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Merge branch 'next' of git://git.infradead.org/users/vkoul/slave-dma

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* 'next' of git://git.infradead.org/users/vkoul/slave-dma: (53 commits)
  ARM: mach-shmobile: specify CHCLR registers on SH7372
  dma: shdma: fix runtime PM: clear channel buffers on reset
  dma/imx-sdma: save irq flags when use spin_lock in sdma_tx_submit
  dmaengine/ste_dma40: clear LNK on channel startup
  dmaengine: intel_mid_dma: remove legacy pm interface
  ASoC: mxs: correct 'direction' of device_prep_dma_cyclic
  dmaengine: intel_mid_dma: error path fix
  dmaengine: intel_mid_dma: locking and freeing fixes
  mtd: gpmi-nand: move to dma_transfer_direction
  mtd: fix compile error for gpmi-nand
  mmc: mxs-mmc: fix the dma_transfer_direction migration
  dmaengine: add DMA_TRANS_NONE to dma_transfer_direction
  dma: mxs-dma: Don't use CLKGATE bits in CTRL0 to disable DMA channels
  dma: mxs-dma: make mxs_dma_prep_slave_sg() multi user safe
  dma: mxs-dma: Always leave mxs_dma_init() with the clock disabled.
  dma: mxs-dma: fix a typo in comment
  DMA: PL330: Remove pm_runtime_xxx calls from pl330 probe/remove
  video i.MX IPU: Fix display connections
  i.MX IPU DMA: Fix wrong burstsize settings
  dmaengine/ste_dma40: allow fixed physical channel
  ...

Fix up conflicts in drivers/dma/{Kconfig,mxs-dma.c,pl330.c}

The conflicts looked pretty trivial, but I'll ask people to verify them.
This commit is contained in:
Linus Torvalds 2012-01-17 18:40:24 -08:00
commit 57f2685c16
73 changed files with 1872 additions and 530 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

14
Documentation/devicetree/bindings/dma/atmel-dma.txt Normal file
View File

@ -0,0 +1,14 @@
* Atmel Direct Memory Access Controller (DMA)
Required properties:
- compatible: Should be "atmel,<chip>-dma"
- reg: Should contain DMA registers location and length
- interrupts: Should contain DMA interrupt
Examples:
dma@ffffec00 {
compatible = "atmel,at91sam9g45-dma";
reg = <0xffffec00 0x200>;
interrupts = <21>;
};

8
Documentation/dmaengine.txt
View File

@ -75,6 +75,10 @@ The slave DMA usage consists of following steps:
slave_sg - DMA a list of scatter gather buffers from/to a peripheral
dma_cyclic - Perform a cyclic DMA operation from/to a peripheral till the
operation is explicitly stopped.
interleaved_dma - This is common to Slave as well as M2M clients. For slave
address of devices' fifo could be already known to the driver.
Various types of operations could be expressed by setting
appropriate values to the 'dma_interleaved_template' members.
A non-NULL return of this transfer API represents a "descriptor" for
the given transaction.
@ -89,6 +93,10 @@ The slave DMA usage consists of following steps:
struct dma_chan *chan, dma_addr_t buf_addr, size_t buf_len,
size_t period_len, enum dma_data_direction direction);
struct dma_async_tx_descriptor *(*device_prep_interleaved_dma)(
struct dma_chan *chan, struct dma_interleaved_template *xt,
unsigned long flags);
The peripheral driver is expected to have mapped the scatterlist for
the DMA operation prior to calling device_prep_slave_sg, and must
keep the scatterlist mapped until the DMA operation has completed.

1
MAINTAINERS
View File

@ -745,6 +745,7 @@ M: Barry Song <baohua.song@csr.com>
L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
S: Maintained
F: arch/arm/mach-prima2/
F: drivers/dma/sirf-dma*
ARM/EBSA110 MACHINE SUPPORT
M: Russell King <linux@arm.linux.org.uk>

6
arch/arm/mach-ep93xx/include/mach/dma.h
View File

@ -37,7 +37,7 @@
*/
struct ep93xx_dma_data {
int port;
enum dma_data_direction direction;
enum dma_transfer_direction direction;
const char *name;
};
@ -80,14 +80,14 @@ static inline bool ep93xx_dma_chan_is_m2p(struct dma_chan *chan)
* channel supports given DMA direction. Only M2P channels have such
* limitation, for M2M channels the direction is configurable.
*/
static inline enum dma_data_direction
static inline enum dma_transfer_direction
ep93xx_dma_chan_direction(struct dma_chan *chan)
{
if (!ep93xx_dma_chan_is_m2p(chan))
return DMA_NONE;
/* even channels are for TX, odd for RX */
return (chan->chan_id % 2 == 0) ? DMA_TO_DEVICE : DMA_FROM_DEVICE;
return (chan->chan_id % 2 == 0) ? DMA_MEM_TO_DEV : DMA_DEV_TO_MEM;
}
#endif /* __ASM_ARCH_DMA_H */

15
arch/arm/mach-shmobile/setup-sh7372.c
View File

@ -445,31 +445,39 @@ static const struct sh_dmae_slave_config sh7372_dmae_slaves[] = {
},
};
#define SH7372_CHCLR 0x220
static const struct sh_dmae_channel sh7372_dmae_channels[] = {
{
.offset = 0,
.dmars = 0,
.dmars_bit = 0,
.chclr_offset = SH7372_CHCLR + 0,
}, {
.offset = 0x10,
.dmars = 0,
.dmars_bit = 8,
.chclr_offset = SH7372_CHCLR + 0x10,
}, {
.offset = 0x20,
.dmars = 4,
.dmars_bit = 0,
.chclr_offset = SH7372_CHCLR + 0x20,
}, {
.offset = 0x30,
.dmars = 4,
.dmars_bit = 8,
.chclr_offset = SH7372_CHCLR + 0x30,
}, {
.offset = 0x50,
.dmars = 8,
.dmars_bit = 0,
.chclr_offset = SH7372_CHCLR + 0x50,
}, {
.offset = 0x60,
.dmars = 8,
.dmars_bit = 8,
.chclr_offset = SH7372_CHCLR + 0x60,
}
};
@ -487,6 +495,7 @@ static struct sh_dmae_pdata dma_platform_data = {
.ts_shift = ts_shift,
.ts_shift_num = ARRAY_SIZE(ts_shift),
.dmaor_init = DMAOR_DME,
.chclr_present = 1,
};
/* Resource order important! */
@ -494,7 +503,7 @@ static struct resource sh7372_dmae0_resources[] = {
{
/* Channel registers and DMAOR */
.start = 0xfe008020,
.end = 0xfe00808f,
.end = 0xfe00828f,
.flags = IORESOURCE_MEM,
},
{
@ -522,7 +531,7 @@ static struct resource sh7372_dmae1_resources[] = {
{
/* Channel registers and DMAOR */
.start = 0xfe018020,
.end = 0xfe01808f,
.end = 0xfe01828f,
.flags = IORESOURCE_MEM,
},
{
@ -550,7 +559,7 @@ static struct resource sh7372_dmae2_resources[] = {
{
/* Channel registers and DMAOR */
.start = 0xfe028020,
.end = 0xfe02808f,
.end = 0xfe02828f,
.flags = IORESOURCE_MEM,
},
{

15
arch/arm/plat-mxc/include/mach/mx3fb.h
View File

@ -22,6 +22,20 @@
#define FB_SYNC_SWAP_RGB 0x04000000
#define FB_SYNC_CLK_SEL_EN 0x02000000
/*
* Specify the way your display is connected. The IPU can arbitrarily
* map the internal colors to the external data lines. We only support
* the following mappings at the moment.
*/
enum disp_data_mapping {
/* blue -> d[0..5], green -> d[6..11], red -> d[12..17] */
IPU_DISP_DATA_MAPPING_RGB666,
/* blue -> d[0..4], green -> d[5..10], red -> d[11..15] */
IPU_DISP_DATA_MAPPING_RGB565,
/* blue -> d[0..7], green -> d[8..15], red -> d[16..23] */
IPU_DISP_DATA_MAPPING_RGB888,
};
/**
* struct mx3fb_platform_data - mx3fb platform data
*
@ -33,6 +47,7 @@ struct mx3fb_platform_data {
const char *name;
const struct fb_videomode *mode;
int num_modes;
enum disp_data_mapping disp_data_fmt;
};
#endif

11
arch/arm/plat-nomadik/include/plat/ste_dma40.h
View File

@ -113,7 +113,8 @@ struct stedma40_half_channel_info {
* @dst_dev_type: Dst device type
* @src_info: Parameters for dst half channel
* @dst_info: Parameters for dst half channel
*
* @use_fixed_channel: if true, use physical channel specified by phy_channel
* @phy_channel: physical channel to use, only if use_fixed_channel is true
*
* This structure has to be filled by the client drivers.
* It is recommended to do all dma configurations for clients in the machine.
@ -129,6 +130,9 @@ struct stedma40_chan_cfg {
int dst_dev_type;
struct stedma40_half_channel_info src_info;
struct stedma40_half_channel_info dst_info;
bool use_fixed_channel;
int phy_channel;
};
/**
@ -153,6 +157,7 @@ struct stedma40_platform_data {
struct stedma40_chan_cfg *memcpy_conf_phy;
struct stedma40_chan_cfg *memcpy_conf_log;
int disabled_channels[STEDMA40_MAX_PHYS];
bool use_esram_lcla;
};
#ifdef CONFIG_STE_DMA40
@ -187,7 +192,7 @@ static inline struct
dma_async_tx_descriptor *stedma40_slave_mem(struct dma_chan *chan,
dma_addr_t addr,
unsigned int size,
enum dma_data_direction direction,
enum dma_transfer_direction direction,
unsigned long flags)
{
struct scatterlist sg;
@ -209,7 +214,7 @@ static inline struct
dma_async_tx_descriptor *stedma40_slave_mem(struct dma_chan *chan,
dma_addr_t addr,
unsigned int size,
enum dma_data_direction direction,
enum dma_transfer_direction direction,
unsigned long flags)
{
return NULL;

4
arch/arm/plat-samsung/dma-ops.c
View File

@ -37,14 +37,14 @@ static unsigned samsung_dmadev_request(enum dma_ch dma_ch,
(void *)dma_ch;
chan = dma_request_channel(mask, pl330_filter, filter_param);
if (info->direction == DMA_FROM_DEVICE) {
if (info->direction == DMA_DEV_TO_MEM) {
memset(&slave_config, 0, sizeof(struct dma_slave_config));
slave_config.direction = info->direction;
slave_config.src_addr = info->fifo;
slave_config.src_addr_width = info->width;
slave_config.src_maxburst = 1;
dmaengine_slave_config(chan, &slave_config);
} else if (info->direction == DMA_TO_DEVICE) {
} else if (info->direction == DMA_MEM_TO_DEV) {
memset(&slave_config, 0, sizeof(struct dma_slave_config));
slave_config.direction = info->direction;
slave_config.dst_addr = info->fifo;

4
arch/arm/plat-samsung/include/plat/dma-ops.h
View File

@ -17,7 +17,7 @@
struct samsung_dma_prep_info {
enum dma_transaction_type cap;
enum dma_data_direction direction;
enum dma_transfer_direction direction;
dma_addr_t buf;
unsigned long period;
unsigned long len;
@ -27,7 +27,7 @@ struct samsung_dma_prep_info {
struct samsung_dma_info {
enum dma_transaction_type cap;
enum dma_data_direction direction;
enum dma_transfer_direction direction;
enum dma_slave_buswidth width;
dma_addr_t fifo;
struct s3c2410_dma_client *client;

27
drivers/dma/Kconfig
View File

@ -124,7 +124,7 @@ config MV_XOR
config MX3_IPU
bool "MX3x Image Processing Unit support"
depends on SOC_IMX31 || SOC_IMX35
depends on ARCH_MXC
select DMA_ENGINE
default y
help
@ -187,6 +187,13 @@ config TIMB_DMA
help
Enable support for the Timberdale FPGA DMA engine.
config SIRF_DMA
tristate "CSR SiRFprimaII DMA support"
depends on ARCH_PRIMA2
select DMA_ENGINE
help
Enable support for the CSR SiRFprimaII DMA engine.
config ARCH_HAS_ASYNC_TX_FIND_CHANNEL
bool
@ -201,26 +208,26 @@ config PL330_DMA
platform_data for a dma-pl330 device.
config PCH_DMA
tristate "Intel EG20T PCH / OKI Semi IOH(ML7213/ML7223) DMA support"
tristate "Intel EG20T PCH / LAPIS Semicon IOH(ML7213/ML7223/ML7831) DMA"
depends on PCI && X86
select DMA_ENGINE
help
Enable support for Intel EG20T PCH DMA engine.
This driver also can be used for OKI SEMICONDUCTOR IOH(Input/
Output Hub), ML7213 and ML7223.
ML7213 IOH is for IVI(In-Vehicle Infotainment) use and ML7223 IOH is
for MP(Media Phone) use.
ML7213/ML7223 is companion chip for Intel Atom E6xx series.
ML7213/ML7223 is completely compatible for Intel EG20T PCH.
This driver also can be used for LAPIS Semiconductor IOH(Input/
Output Hub), ML7213, ML7223 and ML7831.
ML7213 IOH is for IVI(In-Vehicle Infotainment) use, ML7223 IOH is
for MP(Media Phone) use and ML7831 IOH is for general purpose use.
ML7213/ML7223/ML7831 is companion chip for Intel Atom E6xx series.
ML7213/ML7223/ML7831 is completely compatible for Intel EG20T PCH.
config IMX_SDMA
tristate "i.MX SDMA support"
depends on ARCH_MX25 || SOC_IMX31 || SOC_IMX35 || ARCH_MX5
depends on ARCH_MXC
select DMA_ENGINE
help
Support the i.MX SDMA engine. This engine is integrated into
Freescale i.MX25/31/35/51 chips.
Freescale i.MX25/31/35/51/53 chips.
config IMX_DMA
tristate "i.MX DMA support"

1
drivers/dma/Makefile
View File

@ -21,6 +21,7 @@ obj-$(CONFIG_IMX_SDMA) += imx-sdma.o
obj-$(CONFIG_IMX_DMA) += imx-dma.o
obj-$(CONFIG_MXS_DMA) += mxs-dma.o
obj-$(CONFIG_TIMB_DMA) += timb_dma.o
obj-$(CONFIG_SIRF_DMA) += sirf-dma.o
obj-$(CONFIG_STE_DMA40) += ste_dma40.o ste_dma40_ll.o
obj-$(CONFIG_PL330_DMA) += pl330.o
obj-$(CONFIG_PCH_DMA) += pch_dma.o

41
drivers/dma/amba-pl08x.c
View File

@ -854,8 +854,10 @@ static int prep_phy_channel(struct pl08x_dma_chan *plchan,
int ret;
/* Check if we already have a channel */
if (plchan->phychan)
return 0;
if (plchan->phychan) {
ch = plchan->phychan;
goto got_channel;
}
ch = pl08x_get_phy_channel(pl08x, plchan);
if (!ch) {
@ -880,21 +882,22 @@ static int prep_phy_channel(struct pl08x_dma_chan *plchan,
return -EBUSY;
}
ch->signal = ret;
/* Assign the flow control signal to this channel */
if (txd->direction == DMA_TO_DEVICE)
txd->ccfg |= ch->signal << PL080_CONFIG_DST_SEL_SHIFT;
else if (txd->direction == DMA_FROM_DEVICE)
txd->ccfg |= ch->signal << PL080_CONFIG_SRC_SEL_SHIFT;
}
plchan->phychan = ch;
dev_dbg(&pl08x->adev->dev, "allocated physical channel %d and signal %d for xfer on %s\n",
ch->id,
ch->signal,
plchan->name);
got_channel:
/* Assign the flow control signal to this channel */
if (txd->direction == DMA_MEM_TO_DEV)
txd->ccfg |= ch->signal << PL080_CONFIG_DST_SEL_SHIFT;
else if (txd->direction == DMA_DEV_TO_MEM)
txd->ccfg |= ch->signal << PL080_CONFIG_SRC_SEL_SHIFT;
plchan->phychan_hold++;
plchan->phychan = ch;
return 0;
}
@ -1102,10 +1105,10 @@ static int dma_set_runtime_config(struct dma_chan *chan,
/* Transfer direction */
plchan->runtime_direction = config->direction;
if (config->direction == DMA_TO_DEVICE) {
if (config->direction == DMA_MEM_TO_DEV) {
addr_width = config->dst_addr_width;
maxburst = config->dst_maxburst;
} else if (config->direction == DMA_FROM_DEVICE) {
} else if (config->direction == DMA_DEV_TO_MEM) {
addr_width = config->src_addr_width;
maxburst = config->src_maxburst;
} else {
@ -1136,7 +1139,7 @@ static int dma_set_runtime_config(struct dma_chan *chan,
cctl |= burst << PL080_CONTROL_SB_SIZE_SHIFT;
cctl |= burst << PL080_CONTROL_DB_SIZE_SHIFT;
if (plchan->runtime_direction == DMA_FROM_DEVICE) {
if (plchan->runtime_direction == DMA_DEV_TO_MEM) {
plchan->src_addr = config->src_addr;
plchan->src_cctl = pl08x_cctl(cctl) | PL080_CONTROL_DST_INCR |
pl08x_select_bus(plchan->cd->periph_buses,
@ -1152,7 +1155,7 @@ static int dma_set_runtime_config(struct dma_chan *chan,
"configured channel %s (%s) for %s, data width %d, "
"maxburst %d words, LE, CCTL=0x%08x\n",
dma_chan_name(chan), plchan->name,
(config->direction == DMA_FROM_DEVICE) ? "RX" : "TX",
(config->direction == DMA_DEV_TO_MEM) ? "RX" : "TX",
addr_width,
maxburst,
cctl);
@ -1322,7 +1325,7 @@ static struct dma_async_tx_descriptor *pl08x_prep_dma_memcpy(
static struct dma_async_tx_descriptor *pl08x_prep_slave_sg(
struct dma_chan *chan, struct scatterlist *sgl,
unsigned int sg_len, enum dma_data_direction direction,
unsigned int sg_len, enum dma_transfer_direction direction,
unsigned long flags)
{
struct pl08x_dma_chan *plchan = to_pl08x_chan(chan);
@ -1354,10 +1357,10 @@ static struct dma_async_tx_descriptor *pl08x_prep_slave_sg(
*/
txd->direction = direction;
if (direction == DMA_TO_DEVICE) {
if (direction == DMA_MEM_TO_DEV) {
txd->cctl = plchan->dst_cctl;
slave_addr = plchan->dst_addr;
} else if (direction == DMA_FROM_DEVICE) {
} else if (direction == DMA_DEV_TO_MEM) {
txd->cctl = plchan->src_cctl;
slave_addr = plchan->src_addr;
} else {
@ -1368,10 +1371,10 @@ static struct dma_async_tx_descriptor *pl08x_prep_slave_sg(
}
if (plchan->cd->device_fc)
tmp = (direction == DMA_TO_DEVICE) ? PL080_FLOW_MEM2PER_PER :
tmp = (direction == DMA_MEM_TO_DEV) ? PL080_FLOW_MEM2PER_PER :
PL080_FLOW_PER2MEM_PER;
else
tmp = (direction == DMA_TO_DEVICE) ? PL080_FLOW_MEM2PER :
tmp = (direction == DMA_MEM_TO_DEV) ? PL080_FLOW_MEM2PER :
PL080_FLOW_PER2MEM;
txd->ccfg |= tmp << PL080_CONFIG_FLOW_CONTROL_SHIFT;
@ -1387,7 +1390,7 @@ static struct dma_async_tx_descriptor *pl08x_prep_slave_sg(
list_add_tail(&dsg->node, &txd->dsg_list);
dsg->len = sg_dma_len(sg);
if (direction == DMA_TO_DEVICE) {
if (direction == DMA_MEM_TO_DEV) {
dsg->src_addr = sg_phys(sg);
dsg->dst_addr = slave_addr;
} else {

103
drivers/dma/at_hdmac.c
View File

@ -23,6 +23,8 @@
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
#include <linux/of.h>
#include <linux/of_device.h>
#include "at_hdmac_regs.h"
@ -660,7 +662,7 @@ err_desc_get:
*/
static struct dma_async_tx_descriptor *
atc_prep_slave_sg(struct dma_chan *chan, struct scatterlist *sgl,
unsigned int sg_len, enum dma_data_direction direction,
unsigned int sg_len, enum dma_transfer_direction direction,
unsigned long flags)
{
struct at_dma_chan *atchan = to_at_dma_chan(chan);
@ -678,7 +680,7 @@ atc_prep_slave_sg(struct dma_chan *chan, struct scatterlist *sgl,
dev_vdbg(chan2dev(chan), "prep_slave_sg (%d): %s f0x%lx\n",
sg_len,
direction == DMA_TO_DEVICE ? "TO DEVICE" : "FROM DEVICE",
direction == DMA_MEM_TO_DEV ? "TO DEVICE" : "FROM DEVICE",
flags);
if (unlikely(!atslave || !sg_len)) {
@ -692,7 +694,7 @@ atc_prep_slave_sg(struct dma_chan *chan, struct scatterlist *sgl,
ctrlb = ATC_IEN;
switch (direction) {
case DMA_TO_DEVICE:
case DMA_MEM_TO_DEV:
ctrla |= ATC_DST_WIDTH(reg_width);
ctrlb |= ATC_DST_ADDR_MODE_FIXED
| ATC_SRC_ADDR_MODE_INCR
@ -725,7 +727,7 @@ atc_prep_slave_sg(struct dma_chan *chan, struct scatterlist *sgl,
total_len += len;
}
break;
case DMA_FROM_DEVICE:
case DMA_DEV_TO_MEM:
ctrla |= ATC_SRC_WIDTH(reg_width);
ctrlb |= ATC_DST_ADDR_MODE_INCR
| ATC_SRC_ADDR_MODE_FIXED
@ -787,7 +789,7 @@ err_desc_get:
*/
static int
atc_dma_cyclic_check_values(unsigned int reg_width, dma_addr_t buf_addr,
size_t period_len, enum dma_data_direction direction)
size_t period_len, enum dma_transfer_direction direction)
{
if (period_len > (ATC_BTSIZE_MAX << reg_width))
goto err_out;
@ -795,7 +797,7 @@ atc_dma_cyclic_check_values(unsigned int reg_width, dma_addr_t buf_addr,
goto err_out;
if (unlikely(buf_addr & ((1 << reg_width) - 1)))
goto err_out;
if (unlikely(!(direction & (DMA_TO_DEVICE | DMA_FROM_DEVICE))))
if (unlikely(!(direction & (DMA_DEV_TO_MEM | DMA_MEM_TO_DEV))))
goto err_out;
return 0;
@ -810,7 +812,7 @@ err_out:
static int
atc_dma_cyclic_fill_desc(struct at_dma_slave *atslave, struct at_desc *desc,
unsigned int period_index, dma_addr_t buf_addr,
size_t period_len, enum dma_data_direction direction)
size_t period_len, enum dma_transfer_direction direction)
{
u32 ctrla;
unsigned int reg_width = atslave->reg_width;
@ -822,7 +824,7 @@ atc_dma_cyclic_fill_desc(struct at_dma_slave *atslave, struct at_desc *desc,
| period_len >> reg_width;
switch (direction) {
case DMA_TO_DEVICE:
case DMA_MEM_TO_DEV:
desc->lli.saddr = buf_addr + (period_len * period_index);
desc->lli.daddr = atslave->tx_reg;
desc->lli.ctrla = ctrla;
@ -833,7 +835,7 @@ atc_dma_cyclic_fill_desc(struct at_dma_slave *atslave, struct at_desc *desc,
| ATC_DIF(AT_DMA_PER_IF);
break;
case DMA_FROM_DEVICE:
case DMA_DEV_TO_MEM:
desc->lli.saddr = atslave->rx_reg;
desc->lli.daddr = buf_addr + (period_len * period_index);
desc->lli.ctrla = ctrla;
@ -861,7 +863,7 @@ atc_dma_cyclic_fill_desc(struct at_dma_slave *atslave, struct at_desc *desc,
*/
static struct dma_async_tx_descriptor *
atc_prep_dma_cyclic(struct dma_chan *chan, dma_addr_t buf_addr, size_t buf_len,
size_t period_len, enum dma_data_direction direction)
size_t period_len, enum dma_transfer_direction direction)
{
struct at_dma_chan *atchan = to_at_dma_chan(chan);
struct at_dma_slave *atslave = chan->private;
@ -872,7 +874,7 @@ atc_prep_dma_cyclic(struct dma_chan *chan, dma_addr_t buf_addr, size_t buf_len,
unsigned int i;
dev_vdbg(chan2dev(chan), "prep_dma_cyclic: %s buf@0x%08x - %d (%d/%d)\n",
direction == DMA_TO_DEVICE ? "TO DEVICE" : "FROM DEVICE",
direction == DMA_MEM_TO_DEV ? "TO DEVICE" : "FROM DEVICE",
buf_addr,
periods, buf_len, period_len);
@ -1175,6 +1177,56 @@ static void atc_free_chan_resources(struct dma_chan *chan)
/*-- Module Management -----------------------------------------------*/
/* cap_mask is a multi-u32 bitfield, fill it with proper C code. */
static struct at_dma_platform_data at91sam9rl_config = {
.nr_channels = 2,
};
static struct at_dma_platform_data at91sam9g45_config = {
.nr_channels = 8,
};
#if defined(CONFIG_OF)
static const struct of_device_id atmel_dma_dt_ids[] = {
{
.compatible = "atmel,at91sam9rl-dma",
.data = &at91sam9rl_config,
}, {
.compatible = "atmel,at91sam9g45-dma",
.data = &at91sam9g45_config,
}, {
/* sentinel */
}
};
MODULE_DEVICE_TABLE(of, atmel_dma_dt_ids);
#endif
static const struct platform_device_id atdma_devtypes[] = {
{
.name = "at91sam9rl_dma",
.driver_data = (unsigned long) &at91sam9rl_config,
}, {
.name = "at91sam9g45_dma",
.driver_data = (unsigned long) &at91sam9g45_config,
}, {
/* sentinel */
}
};
static inline struct at_dma_platform_data * __init at_dma_get_driver_data(
struct platform_device *pdev)
{
if (pdev->dev.of_node) {
const struct of_device_id *match;
match = of_match_node(atmel_dma_dt_ids, pdev->dev.of_node);
if (match == NULL)
return NULL;
return match->data;
}
return (struct at_dma_platform_data *)
platform_get_device_id(pdev)->driver_data;
}
/**
* at_dma_off - disable DMA controller
* @atdma: the Atmel HDAMC device
@ -1193,18 +1245,23 @@ static void at_dma_off(struct at_dma *atdma)
static int __init at_dma_probe(struct platform_device *pdev)
{
struct at_dma_platform_data *pdata;
struct resource *io;
struct at_dma *atdma;
size_t size;
int irq;
int err;
int i;
struct at_dma_platform_data *plat_dat;
/* get DMA Controller parameters from platform */
pdata = pdev->dev.platform_data;
if (!pdata || pdata->nr_channels > AT_DMA_MAX_NR_CHANNELS)
return -EINVAL;
/* setup platform data for each SoC */
dma_cap_set(DMA_MEMCPY, at91sam9rl_config.cap_mask);
dma_cap_set(DMA_MEMCPY, at91sam9g45_config.cap_mask);
dma_cap_set(DMA_SLAVE, at91sam9g45_config.cap_mask);
/* get DMA parameters from controller type */
plat_dat = at_dma_get_driver_data(pdev);
if (!plat_dat)
return -ENODEV;
io = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!io)
@ -1215,14 +1272,14 @@ static int __init at_dma_probe(struct platform_device *pdev)
return irq;
size = sizeof(struct at_dma);
size += pdata->nr_channels * sizeof(struct at_dma_chan);
size += plat_dat->nr_channels * sizeof(struct at_dma_chan);
atdma = kzalloc(size, GFP_KERNEL);
if (!atdma)
return -ENOMEM;
/* discover transaction capabilites from the platform data */
atdma->dma_common.cap_mask = pdata->cap_mask;
atdma->all_chan_mask = (1 << pdata->nr_channels) - 1;
/* discover transaction capabilities */
atdma->dma_common.cap_mask = plat_dat->cap_mask;
atdma->all_chan_mask = (1 << plat_dat->nr_channels) - 1;
size = resource_size(io);
if (!request_mem_region(io->start, size, pdev->dev.driver->name)) {
@ -1268,7 +1325,7 @@ static int __init at_dma_probe(struct platform_device *pdev)
/* initialize channels related values */
INIT_LIST_HEAD(&atdma->dma_common.channels);
for (i = 0; i < pdata->nr_channels; i++) {
for (i = 0; i < plat_dat->nr_channels; i++) {
struct at_dma_chan *atchan = &atdma->chan[i];
atchan->chan_common.device = &atdma->dma_common;
@ -1313,7 +1370,7 @@ static int __init at_dma_probe(struct platform_device *pdev)
dev_info(&pdev->dev, "Atmel AHB DMA Controller ( %s%s), %d channels\n",
dma_has_cap(DMA_MEMCPY, atdma->dma_common.cap_mask) ? "cpy " : "",
dma_has_cap(DMA_SLAVE, atdma->dma_common.cap_mask) ? "slave " : "",
pdata->nr_channels);
plat_dat->nr_channels);
dma_async_device_register(&atdma->dma_common);
@ -1495,9 +1552,11 @@ static const struct dev_pm_ops at_dma_dev_pm_ops = {
static struct platform_driver at_dma_driver = {
.remove = __exit_p(at_dma_remove),
.shutdown = at_dma_shutdown,
.id_table = atdma_devtypes,
.driver = {
.name = "at_hdmac",
.pm = &at_dma_dev_pm_ops,
.of_match_table = of_match_ptr(atmel_dma_dt_ids),
},
};

1
drivers/dma/at_hdmac_regs.h
View File

@ -251,6 +251,7 @@ static inline struct at_dma_chan *to_at_dma_chan(struct dma_chan *dchan)
/**
* struct at_dma - internal representation of an Atmel HDMA Controller
* @chan_common: common dmaengine dma_device object members
* @atdma_devtype: identifier of DMA controller compatibility
* @ch_regs: memory mapped register base
* @clk: dma controller clock
* @save_imr: interrupt mask register that is saved on suspend/resume cycle

12
drivers/dma/coh901318.c
View File

@ -39,7 +39,7 @@ struct coh901318_desc {
struct scatterlist *sg;
unsigned int sg_len;
struct coh901318_lli *lli;
enum dma_data_direction dir;
enum dma_transfer_direction dir;
unsigned long flags;
u32 head_config;
u32 head_ctrl;
@ -1034,7 +1034,7 @@ coh901318_prep_memcpy(struct dma_chan *chan, dma_addr_t dest, dma_addr_t src,
static struct dma_async_tx_descriptor *
coh901318_prep_slave_sg(struct dma_chan *chan, struct scatterlist *sgl,
unsigned int sg_len, enum dma_data_direction direction,
unsigned int sg_len, enum dma_transfer_direction direction,
unsigned long flags)
{
struct coh901318_chan *cohc = to_coh901318_chan(chan);
@ -1077,7 +1077,7 @@ coh901318_prep_slave_sg(struct dma_chan *chan, struct scatterlist *sgl,
ctrl_last |= cohc->runtime_ctrl;
ctrl |= cohc->runtime_ctrl;
if (direction == DMA_TO_DEVICE) {
if (direction == DMA_MEM_TO_DEV) {
u32 tx_flags = COH901318_CX_CTRL_PRDD_SOURCE |
COH901318_CX_CTRL_SRC_ADDR_INC_ENABLE;
@ -1085,7 +1085,7 @@ coh901318_prep_slave_sg(struct dma_chan *chan, struct scatterlist *sgl,
ctrl_chained |= tx_flags;
ctrl_last |= tx_flags;
ctrl |= tx_flags;
} else if (direction == DMA_FROM_DEVICE) {
} else if (direction == DMA_DEV_TO_MEM) {
u32 rx_flags = COH901318_CX_CTRL_PRDD_DEST |
COH901318_CX_CTRL_DST_ADDR_INC_ENABLE;
@ -1274,11 +1274,11 @@ static void coh901318_dma_set_runtimeconfig(struct dma_chan *chan,
int i = 0;
/* We only support mem to per or per to mem transfers */
if (config->direction == DMA_FROM_DEVICE) {
if (config->direction == DMA_DEV_TO_MEM) {
addr = config->src_addr;
addr_width = config->src_addr_width;
maxburst = config->src_maxburst;
} else if (config->direction == DMA_TO_DEVICE) {
} else if (config->direction == DMA_MEM_TO_DEV) {
addr = config->dst_addr;
addr_width = config->dst_addr_width;
maxburst = config->dst_maxburst;

23
drivers/dma/coh901318_lli.c
View File

@ -7,11 +7,10 @@
* Author: Per Friden <per.friden@stericsson.com>
*/
#include <linux/dma-mapping.h>
#include <linux/spinlock.h>
#include <linux/dmapool.h>
#include <linux/memory.h>
#include <linux/gfp.h>
#include <linux/dmapool.h>
#include <mach/coh901318.h>
#include "coh901318_lli.h"
@ -177,18 +176,18 @@ coh901318_lli_fill_single(struct coh901318_pool *pool,
struct coh901318_lli *lli,
dma_addr_t buf, unsigned int size,
dma_addr_t dev_addr, u32 ctrl_chained, u32 ctrl_eom,
enum dma_data_direction dir)
enum dma_transfer_direction dir)
{
int s = size;
dma_addr_t src;
dma_addr_t dst;
if (dir == DMA_TO_DEVICE) {
if (dir == DMA_MEM_TO_DEV) {
src = buf;
dst = dev_addr;
} else if (dir == DMA_FROM_DEVICE) {
} else if (dir == DMA_DEV_TO_MEM) {
src = dev_addr;
dst = buf;
@ -215,9 +214,9 @@ coh901318_lli_fill_single(struct coh901318_pool *pool,
lli = coh901318_lli_next(lli);
if (dir == DMA_TO_DEVICE)
if (dir == DMA_MEM_TO_DEV)
src += block_size;
else if (dir == DMA_FROM_DEVICE)
else if (dir == DMA_DEV_TO_MEM)
dst += block_size;
}
@ -234,7 +233,7 @@ coh901318_lli_fill_sg(struct coh901318_pool *pool,
struct scatterlist *sgl, unsigned int nents,
dma_addr_t dev_addr, u32 ctrl_chained, u32 ctrl,
u32 ctrl_last,
enum dma_data_direction dir, u32 ctrl_irq_mask)
enum dma_transfer_direction dir, u32 ctrl_irq_mask)
{
int i;
struct scatterlist *sg;
@ -249,9 +248,9 @@ coh901318_lli_fill_sg(struct coh901318_pool *pool,
spin_lock(&pool->lock);
if (dir == DMA_TO_DEVICE)
if (dir == DMA_MEM_TO_DEV)
dst = dev_addr;
else if (dir == DMA_FROM_DEVICE)
else if (dir == DMA_DEV_TO_MEM)
src = dev_addr;
else
goto err;
@ -269,7 +268,7 @@ coh901318_lli_fill_sg(struct coh901318_pool *pool,
ctrl_sg = ctrl ? ctrl : ctrl_last;
if (dir == DMA_TO_DEVICE)
if (dir == DMA_MEM_TO_DEV)
/* increment source address */
src = sg_phys(sg);
else
@ -293,7 +292,7 @@ coh901318_lli_fill_sg(struct coh901318_pool *pool,
lli->src_addr = src;
lli->dst_addr = dst;
if (dir == DMA_FROM_DEVICE)
if (dir == DMA_DEV_TO_MEM)
dst += elem_size;
else
src += elem_size;

4
drivers/dma/coh901318_lli.h
View File

@ -97,7 +97,7 @@ coh901318_lli_fill_single(struct coh901318_pool *pool,
struct coh901318_lli *lli,
dma_addr_t buf, unsigned int size,
dma_addr_t dev_addr, u32 ctrl_chained, u32 ctrl_last,
enum dma_data_direction dir);
enum dma_transfer_direction dir);
/**
* coh901318_lli_fill_single() - Prepares the lli:s for dma scatter list transfer
@ -119,6 +119,6 @@ coh901318_lli_fill_sg(struct coh901318_pool *pool,
struct scatterlist *sg, unsigned int nents,
dma_addr_t dev_addr, u32 ctrl_chained,
u32 ctrl, u32 ctrl_last,
enum dma_data_direction dir, u32 ctrl_irq_mask);
enum dma_transfer_direction dir, u32 ctrl_irq_mask);
#endif /* COH901318_LLI_H */

4
drivers/dma/dmaengine.c
View File

@ -693,12 +693,12 @@ int dma_async_device_register(struct dma_device *device)
!device->device_prep_dma_interrupt);
BUG_ON(dma_has_cap(DMA_SG, device->cap_mask) &&
!device->device_prep_dma_sg);
BUG_ON(dma_has_cap(DMA_SLAVE, device->cap_mask) &&
!device->device_prep_slave_sg);
BUG_ON(dma_has_cap(DMA_CYCLIC, device->cap_mask) &&
!device->device_prep_dma_cyclic);
BUG_ON(dma_has_cap(DMA_SLAVE, device->cap_mask) &&
!device->device_control);
BUG_ON(dma_has_cap(DMA_INTERLEAVE, device->cap_mask) &&
!device->device_prep_interleaved_dma);
BUG_ON(!device->device_alloc_chan_resources);
BUG_ON(!device->device_free_chan_resources);

83
drivers/dma/dw_dmac.c
View File

@ -166,6 +166,38 @@ dwc_assign_cookie(struct dw_dma_chan *dwc, struct dw_desc *desc)
return cookie;
}
static void dwc_initialize(struct dw_dma_chan *dwc)
{
struct dw_dma *dw = to_dw_dma(dwc->chan.device);
struct dw_dma_slave *dws = dwc->chan.private;
u32 cfghi = DWC_CFGH_FIFO_MODE;
u32 cfglo = DWC_CFGL_CH_PRIOR(dwc->priority);
if (dwc->initialized == true)
return;
if (dws) {
/*
* We need controller-specific data to set up slave
* transfers.
*/
BUG_ON(!dws->dma_dev || dws->dma_dev != dw->dma.dev);
cfghi = dws->cfg_hi;
cfglo |= dws->cfg_lo & ~DWC_CFGL_CH_PRIOR_MASK;
}
channel_writel(dwc, CFG_LO, cfglo);
channel_writel(dwc, CFG_HI, cfghi);
/* Enable interrupts */
channel_set_bit(dw, MASK.XFER, dwc->mask);
channel_set_bit(dw, MASK.BLOCK, dwc->mask);
channel_set_bit(dw, MASK.ERROR, dwc->mask);
dwc->initialized = true;
}
/*----------------------------------------------------------------------*/
/* Called with dwc->lock held and bh disabled */
@ -189,6 +221,8 @@ static void dwc_dostart(struct dw_dma_chan *dwc, struct dw_desc *first)
return;
}
dwc_initialize(dwc);
channel_writel(dwc, LLP, first->txd.phys);
channel_writel(dwc, CTL_LO,
DWC_CTLL_LLP_D_EN | DWC_CTLL_LLP_S_EN);
@ -696,7 +730,7 @@ err_desc_get:
static struct dma_async_tx_descriptor *
dwc_prep_slave_sg(struct dma_chan *chan, struct scatterlist *sgl,
unsigned int sg_len, enum dma_data_direction direction,
unsigned int sg_len, enum dma_transfer_direction direction,
unsigned long flags)
{
struct dw_dma_chan *dwc = to_dw_dma_chan(chan);
@ -720,7 +754,7 @@ dwc_prep_slave_sg(struct dma_chan *chan, struct scatterlist *sgl,
prev = first = NULL;
switch (direction) {
case DMA_TO_DEVICE:
case DMA_MEM_TO_DEV:
ctllo = (DWC_DEFAULT_CTLLO(chan->private)
| DWC_CTLL_DST_WIDTH(reg_width)
| DWC_CTLL_DST_FIX
@ -777,7 +811,7 @@ slave_sg_todev_fill_desc:
goto slave_sg_todev_fill_desc;
}
break;
case DMA_FROM_DEVICE:
case DMA_DEV_TO_MEM:
ctllo = (DWC_DEFAULT_CTLLO(chan->private)
| DWC_CTLL_SRC_WIDTH(reg_width)
| DWC_CTLL_DST_INC
@ -959,10 +993,7 @@ static int dwc_alloc_chan_resources(struct dma_chan *chan)
struct dw_dma_chan *dwc = to_dw_dma_chan(chan);
struct dw_dma *dw = to_dw_dma(chan->device);
struct dw_desc *desc;
struct dw_dma_slave *dws;
int i;
u32 cfghi;
u32 cfglo;
unsigned long flags;
dev_vdbg(chan2dev(chan), "alloc_chan_resources\n");
@ -975,26 +1006,6 @@ static int dwc_alloc_chan_resources(struct dma_chan *chan)
dwc->completed = chan->cookie = 1;
cfghi = DWC_CFGH_FIFO_MODE;
cfglo = 0;
dws = chan->private;
if (dws) {
/*
* We need controller-specific data to set up slave
* transfers.
*/
BUG_ON(!dws->dma_dev || dws->dma_dev != dw->dma.dev);
cfghi = dws->cfg_hi;
cfglo = dws->cfg_lo & ~DWC_CFGL_CH_PRIOR_MASK;
}
cfglo |= DWC_CFGL_CH_PRIOR(dwc->priority);
channel_writel(dwc, CFG_LO, cfglo);
channel_writel(dwc, CFG_HI, cfghi);
/*
* NOTE: some controllers may have additional features that we
* need to initialize here, like "scatter-gather" (which
@ -1026,11 +1037,6 @@ static int dwc_alloc_chan_resources(struct dma_chan *chan)
i = ++dwc->descs_allocated;
}
/* Enable interrupts */
channel_set_bit(dw, MASK.XFER, dwc->mask);
channel_set_bit(dw, MASK.BLOCK, dwc->mask);
channel_set_bit(dw, MASK.ERROR, dwc->mask);
spin_unlock_irqrestore(&dwc->lock, flags);
dev_dbg(chan2dev(chan),
@ -1058,6 +1064,7 @@ static void dwc_free_chan_resources(struct dma_chan *chan)
spin_lock_irqsave(&dwc->lock, flags);
list_splice_init(&dwc->free_list, &list);
dwc->descs_allocated = 0;
dwc->initialized = false;
/* Disable interrupts */
channel_clear_bit(dw, MASK.XFER, dwc->mask);
@ -1165,7 +1172,7 @@ EXPORT_SYMBOL(dw_dma_cyclic_stop);
*/
struct dw_cyclic_desc *dw_dma_cyclic_prep(struct dma_chan *chan,
dma_addr_t buf_addr, size_t buf_len, size_t period_len,
enum dma_data_direction direction)
enum dma_transfer_direction direction)
{
struct dw_dma_chan *dwc = to_dw_dma_chan(chan);
struct dw_cyclic_desc *cdesc;
@ -1206,7 +1213,7 @@ struct dw_cyclic_desc *dw_dma_cyclic_prep(struct dma_chan *chan,
goto out_err;
if (unlikely(buf_addr & ((1 << reg_width) - 1)))
goto out_err;
if (unlikely(!(direction & (DMA_TO_DEVICE | DMA_FROM_DEVICE))))
if (unlikely(!(direction & (DMA_MEM_TO_DEV | DMA_DEV_TO_MEM))))
goto out_err;
retval = ERR_PTR(-ENOMEM);
@ -1228,7 +1235,7 @@ struct dw_cyclic_desc *dw_dma_cyclic_prep(struct dma_chan *chan,
goto out_err_desc_get;
switch (direction) {
case DMA_TO_DEVICE:
case DMA_MEM_TO_DEV:
desc->lli.dar = dws->tx_reg;
desc->lli.sar = buf_addr + (period_len * i);
desc->lli.ctllo = (DWC_DEFAULT_CTLLO(chan->private)
@ -1239,7 +1246,7 @@ struct dw_cyclic_desc *dw_dma_cyclic_prep(struct dma_chan *chan,
| DWC_CTLL_FC(dws->fc)
| DWC_CTLL_INT_EN);
break;
case DMA_FROM_DEVICE:
case DMA_DEV_TO_MEM:
desc->lli.dar = buf_addr + (period_len * i);
desc->lli.sar = dws->rx_reg;
desc->lli.ctllo = (DWC_DEFAULT_CTLLO(chan->private)
@ -1335,6 +1342,8 @@ EXPORT_SYMBOL(dw_dma_cyclic_free);
static void dw_dma_off(struct dw_dma *dw)
{
int i;
dma_writel(dw, CFG, 0);
channel_clear_bit(dw, MASK.XFER, dw->all_chan_mask);
@ -1345,6 +1354,9 @@ static void dw_dma_off(struct dw_dma *dw)
while (dma_readl(dw, CFG) & DW_CFG_DMA_EN)
cpu_relax();
for (i = 0; i < dw->dma.chancnt; i++)
dw->chan[i].initialized = false;
}
static int __init dw_probe(struct platform_device *pdev)
@ -1533,6 +1545,7 @@ static int dw_suspend_noirq(struct device *dev)
dw_dma_off(platform_get_drvdata(pdev));
clk_disable(dw->clk);
return 0;
}

1
drivers/dma/dw_dmac_regs.h
View File

@ -140,6 +140,7 @@ struct dw_dma_chan {
u8 mask;
u8 priority;
bool paused;
bool initialized;
spinlock_t lock;

90
drivers/dma/ep93xx_dma.c
View File

@ -246,6 +246,9 @@ static void ep93xx_dma_set_active(struct ep93xx_dma_chan *edmac,
static struct ep93xx_dma_desc *
ep93xx_dma_get_active(struct ep93xx_dma_chan *edmac)
{
if (list_empty(&edmac->active))
return NULL;
return list_first_entry(&edmac->active, struct ep93xx_dma_desc, node);
}
@ -263,16 +266,22 @@ ep93xx_dma_get_active(struct ep93xx_dma_chan *edmac)
*/
static bool ep93xx_dma_advance_active(struct ep93xx_dma_chan *edmac)
{
struct ep93xx_dma_desc *desc;
list_rotate_left(&edmac->active);
if (test_bit(EP93XX_DMA_IS_CYCLIC, &edmac->flags))
return true;
desc = ep93xx_dma_get_active(edmac);
if (!desc)
return false;
/*
* If txd.cookie is set it means that we are back in the first
* descriptor in the chain and hence done with it.
*/
return !ep93xx_dma_get_active(edmac)->txd.cookie;
return !desc->txd.cookie;
}
/*
@ -327,10 +336,16 @@ static void m2p_hw_shutdown(struct ep93xx_dma_chan *edmac)
static void m2p_fill_desc(struct ep93xx_dma_chan *edmac)
{
struct ep93xx_dma_desc *desc = ep93xx_dma_get_active(edmac);
struct ep93xx_dma_desc *desc;
u32 bus_addr;
if (ep93xx_dma_chan_direction(&edmac->chan) == DMA_TO_DEVICE)
desc = ep93xx_dma_get_active(edmac);
if (!desc) {
dev_warn(chan2dev(edmac), "M2P: empty descriptor list\n");
return;
}
if (ep93xx_dma_chan_direction(&edmac->chan) == DMA_MEM_TO_DEV)
bus_addr = desc->src_addr;
else
bus_addr = desc->dst_addr;
@ -443,7 +458,7 @@ static int m2m_hw_setup(struct ep93xx_dma_chan *edmac)
control = (5 << M2M_CONTROL_PWSC_SHIFT);
control |= M2M_CONTROL_NO_HDSK;
if (data->direction == DMA_TO_DEVICE) {
if (data->direction == DMA_MEM_TO_DEV) {
control |= M2M_CONTROL_DAH;
control |= M2M_CONTROL_TM_TX;
control |= M2M_CONTROL_RSS_SSPTX;
@ -459,11 +474,7 @@ static int m2m_hw_setup(struct ep93xx_dma_chan *edmac)
* This IDE part is totally untested. Values below are taken
* from the EP93xx Users's Guide and might not be correct.
*/
control |= M2M_CONTROL_NO_HDSK;
control |= M2M_CONTROL_RSS_IDE;
control |= M2M_CONTROL_PW_16;
if (data->direction == DMA_TO_DEVICE) {
if (data->direction == DMA_MEM_TO_DEV) {
/* Worst case from the UG */
control = (3 << M2M_CONTROL_PWSC_SHIFT);
control |= M2M_CONTROL_DAH;
@ -473,6 +484,10 @@ static int m2m_hw_setup(struct ep93xx_dma_chan *edmac)
control |= M2M_CONTROL_SAH;
control |= M2M_CONTROL_TM_RX;
}
control |= M2M_CONTROL_NO_HDSK;
control |= M2M_CONTROL_RSS_IDE;
control |= M2M_CONTROL_PW_16;
break;
default:
@ -491,7 +506,13 @@ static void m2m_hw_shutdown(struct ep93xx_dma_chan *edmac)
static void m2m_fill_desc(struct ep93xx_dma_chan *edmac)
{
struct ep93xx_dma_desc *desc = ep93xx_dma_get_active(edmac);
struct ep93xx_dma_desc *desc;
desc = ep93xx_dma_get_active(edmac);
if (!desc) {
dev_warn(chan2dev(edmac), "M2M: empty descriptor list\n");
return;
}
if (edmac->buffer == 0) {
writel(desc->src_addr, edmac->regs + M2M_SAR_BASE0);
@ -669,24 +690,30 @@ static void ep93xx_dma_tasklet(unsigned long data)
{
struct ep93xx_dma_chan *edmac = (struct ep93xx_dma_chan *)data;
struct ep93xx_dma_desc *desc, *d;
dma_async_tx_callback callback;
void *callback_param;
dma_async_tx_callback callback = NULL;
void *callback_param = NULL;
LIST_HEAD(list);
spin_lock_irq(&edmac->lock);
/*
* If dma_terminate_all() was called before we get to run, the active
* list has become empty. If that happens we aren't supposed to do
* anything more than call ep93xx_dma_advance_work().
*/
desc = ep93xx_dma_get_active(edmac);
if (desc->complete) {
edmac->last_completed = desc->txd.cookie;
list_splice_init(&edmac->active, &list);
if (desc) {
if (desc->complete) {
edmac->last_completed = desc->txd.cookie;
list_splice_init(&edmac->active, &list);
}
callback = desc->txd.callback;
callback_param = desc->txd.callback_param;
}
spin_unlock_irq(&edmac->lock);
/* Pick up the next descriptor from the queue */
ep93xx_dma_advance_work(edmac);
callback = desc->txd.callback;
callback_param = desc->txd.callback_param;
/* Now we can release all the chained descriptors */
list_for_each_entry_safe(desc, d, &list, node) {
/*
@ -706,13 +733,22 @@ static void ep93xx_dma_tasklet(unsigned long data)
static irqreturn_t ep93xx_dma_interrupt(int irq, void *dev_id)
{
struct ep93xx_dma_chan *edmac = dev_id;
struct ep93xx_dma_desc *desc;
irqreturn_t ret = IRQ_HANDLED;
spin_lock(&edmac->lock);
desc = ep93xx_dma_get_active(edmac);
if (!desc) {
dev_warn(chan2dev(edmac),
"got interrupt while active list is empty\n");
spin_unlock(&edmac->lock);
return IRQ_NONE;
}
switch (edmac->edma->hw_interrupt(edmac)) {
case INTERRUPT_DONE:
ep93xx_dma_get_active(edmac)->complete = true;
desc->complete = true;
tasklet_schedule(&edmac->tasklet);
break;
@ -803,8 +839,8 @@ static int ep93xx_dma_alloc_chan_resources(struct dma_chan *chan)
switch (data->port) {
case EP93XX_DMA_SSP:
case EP93XX_DMA_IDE:
if (data->direction != DMA_TO_DEVICE &&
data->direction != DMA_FROM_DEVICE)
if (data->direction != DMA_MEM_TO_DEV &&
data->direction != DMA_DEV_TO_MEM)
return -EINVAL;
break;
default:
@ -952,7 +988,7 @@ fail:
*/
static struct dma_async_tx_descriptor *
ep93xx_dma_prep_slave_sg(struct dma_chan *chan, struct scatterlist *sgl,
unsigned int sg_len, enum dma_data_direction dir,
unsigned int sg_len, enum dma_transfer_direction dir,
unsigned long flags)
{
struct ep93xx_dma_chan *edmac = to_ep93xx_dma_chan(chan);
@ -988,7 +1024,7 @@ ep93xx_dma_prep_slave_sg(struct dma_chan *chan, struct scatterlist *sgl,
goto fail;
}
if (dir == DMA_TO_DEVICE) {
if (dir == DMA_MEM_TO_DEV) {
desc->src_addr = sg_dma_address(sg);
desc->dst_addr = edmac->runtime_addr;
} else {
@ -1032,7 +1068,7 @@ fail:
static struct dma_async_tx_descriptor *
ep93xx_dma_prep_dma_cyclic(struct dma_chan *chan, dma_addr_t dma_addr,
size_t buf_len, size_t period_len,
enum dma_data_direction dir)
enum dma_transfer_direction dir)
{
struct ep93xx_dma_chan *edmac = to_ep93xx_dma_chan(chan);
struct ep93xx_dma_desc *desc, *first;
@ -1065,7 +1101,7 @@ ep93xx_dma_prep_dma_cyclic(struct dma_chan *chan, dma_addr_t dma_addr,
goto fail;
}
if (dir == DMA_TO_DEVICE) {
if (dir == DMA_MEM_TO_DEV) {
desc->src_addr = dma_addr + offset;
desc->dst_addr = edmac->runtime_addr;
} else {
@ -1133,12 +1169,12 @@ static int ep93xx_dma_slave_config(struct ep93xx_dma_chan *edmac,
return -EINVAL;
switch (config->direction) {
case DMA_FROM_DEVICE:
case DMA_DEV_TO_MEM:
width = config->src_addr_width;
addr = config->src_addr;
break;
case DMA_TO_DEVICE:
case DMA_MEM_TO_DEV:
width = config->dst_addr_width;
addr = config->dst_addr;
break;

4
drivers/dma/fsldma.c
View File

@ -772,7 +772,7 @@ fail:
*/
static struct dma_async_tx_descriptor *fsl_dma_prep_slave_sg(
struct dma_chan *dchan, struct scatterlist *sgl, unsigned int sg_len,
enum dma_data_direction direction, unsigned long flags)
enum dma_transfer_direction direction, unsigned long flags)
{
/*
* This operation is not supported on the Freescale DMA controller
@ -819,7 +819,7 @@ static int fsl_dma_device_control(struct dma_chan *dchan,
return -ENXIO;
/* we set the controller burst size depending on direction */
if (config->direction == DMA_TO_DEVICE)
if (config->direction == DMA_MEM_TO_DEV)
size = config->dst_addr_width * config->dst_maxburst;
else
size = config->src_addr_width * config->src_maxburst;

10
drivers/dma/imx-dma.c
View File

@ -107,7 +107,7 @@ static int imxdma_control(struct dma_chan *chan, enum dma_ctrl_cmd cmd,
imx_dma_disable(imxdmac->imxdma_channel);
return 0;
case DMA_SLAVE_CONFIG:
if (dmaengine_cfg->direction == DMA_FROM_DEVICE) {
if (dmaengine_cfg->direction == DMA_DEV_TO_MEM) {
imxdmac->per_address = dmaengine_cfg->src_addr;
imxdmac->watermark_level = dmaengine_cfg->src_maxburst;
imxdmac->word_size = dmaengine_cfg->src_addr_width;
@ -224,7 +224,7 @@ static void imxdma_free_chan_resources(struct dma_chan *chan)
static struct dma_async_tx_descriptor *imxdma_prep_slave_sg(
struct dma_chan *chan, struct scatterlist *sgl,
unsigned int sg_len, enum dma_data_direction direction,
unsigned int sg_len, enum dma_transfer_direction direction,
unsigned long flags)
{
struct imxdma_channel *imxdmac = to_imxdma_chan(chan);
@ -241,7 +241,7 @@ static struct dma_async_tx_descriptor *imxdma_prep_slave_sg(
dma_length += sg->length;
}
if (direction == DMA_FROM_DEVICE)
if (direction == DMA_DEV_TO_MEM)
dmamode = DMA_MODE_READ;
else
dmamode = DMA_MODE_WRITE;
@ -271,7 +271,7 @@ static struct dma_async_tx_descriptor *imxdma_prep_slave_sg(
static struct dma_async_tx_descriptor *imxdma_prep_dma_cyclic(
struct dma_chan *chan, dma_addr_t dma_addr, size_t buf_len,
size_t period_len, enum dma_data_direction direction)
size_t period_len, enum dma_transfer_direction direction)
{
struct imxdma_channel *imxdmac = to_imxdma_chan(chan);
struct imxdma_engine *imxdma = imxdmac->imxdma;
@ -317,7 +317,7 @@ static struct dma_async_tx_descriptor *imxdma_prep_dma_cyclic(
imxdmac->sg_list[periods].page_link =
((unsigned long)imxdmac->sg_list | 0x01) & ~0x02;
if (direction == DMA_FROM_DEVICE)
if (direction == DMA_DEV_TO_MEM)
dmamode = DMA_MODE_READ;
else
dmamode = DMA_MODE_WRITE;

27
drivers/dma/imx-sdma.c
View File

@ -247,7 +247,7 @@ struct sdma_engine;
struct sdma_channel {
struct sdma_engine *sdma;
unsigned int channel;
enum dma_data_direction direction;
enum dma_transfer_direction direction;
enum sdma_peripheral_type peripheral_type;
unsigned int event_id0;
unsigned int event_id1;
@ -268,6 +268,8 @@ struct sdma_channel {
struct dma_async_tx_descriptor desc;
dma_cookie_t last_completed;
enum dma_status status;
unsigned int chn_count;
unsigned int chn_real_count;
};
#define IMX_DMA_SG_LOOP (1 << 0)
@ -503,6 +505,7 @@ static void mxc_sdma_handle_channel_normal(struct sdma_channel *sdmac)
struct sdma_buffer_descriptor *bd;
int i, error = 0;
sdmac->chn_real_count = 0;
/*
* non loop mode. Iterate over all descriptors, collect
* errors and call callback function
@ -512,6 +515,7 @@ static void mxc_sdma_handle_channel_normal(struct sdma_channel *sdmac)
if (bd->mode.status & (BD_DONE | BD_RROR))
error = -EIO;
sdmac->chn_real_count += bd->mode.count;
}
if (error)
@ -519,9 +523,9 @@ static void mxc_sdma_handle_channel_normal(struct sdma_channel *sdmac)
else
sdmac->status = DMA_SUCCESS;
sdmac->last_completed = sdmac->desc.cookie;
if (sdmac->desc.callback)
sdmac->desc.callback(sdmac->desc.callback_param);
sdmac->last_completed = sdmac->desc.cookie;
}
static void mxc_sdma_handle_channel(struct sdma_channel *sdmac)
@ -650,7 +654,7 @@ static int sdma_load_context(struct sdma_channel *sdmac)
struct sdma_buffer_descriptor *bd0 = sdma->channel[0].bd;
int ret;
if (sdmac->direction == DMA_FROM_DEVICE) {
if (sdmac->direction == DMA_DEV_TO_MEM) {
load_address = sdmac->pc_from_device;
} else {
load_address = sdmac->pc_to_device;
@ -832,17 +836,18 @@ static struct sdma_channel *to_sdma_chan(struct dma_chan *chan)
static dma_cookie_t sdma_tx_submit(struct dma_async_tx_descriptor *tx)
{
unsigned long flags;
struct sdma_channel *sdmac = to_sdma_chan(tx->chan);
struct sdma_engine *sdma = sdmac->sdma;
dma_cookie_t cookie;
spin_lock_irq(&sdmac->lock);
spin_lock_irqsave(&sdmac->lock, flags);
cookie = sdma_assign_cookie(sdmac);
sdma_enable_channel(sdma, sdmac->channel);
spin_unlock_irq(&sdmac->lock);
spin_unlock_irqrestore(&sdmac->lock, flags);
return cookie;
}
@ -911,7 +916,7 @@ static void sdma_free_chan_resources(struct dma_chan *chan)
static struct dma_async_tx_descriptor *sdma_prep_slave_sg(
struct dma_chan *chan, struct scatterlist *sgl,
unsigned int sg_len, enum dma_data_direction direction,
unsigned int sg_len, enum dma_transfer_direction direction,
unsigned long flags)
{
struct sdma_channel *sdmac = to_sdma_chan(chan);
@ -941,6 +946,7 @@ static struct dma_async_tx_descriptor *sdma_prep_slave_sg(
goto err_out;
}
sdmac->chn_count = 0;
for_each_sg(sgl, sg, sg_len, i) {
struct sdma_buffer_descriptor *bd = &sdmac->bd[i];
int param;
@ -957,6 +963,7 @@ static struct dma_async_tx_descriptor *sdma_prep_slave_sg(
}
bd->mode.count = count;
sdmac->chn_count += count;
if (sdmac->word_size > DMA_SLAVE_BUSWIDTH_4_BYTES) {
ret = -EINVAL;
@ -1008,7 +1015,7 @@ err_out:
static struct dma_async_tx_descriptor *sdma_prep_dma_cyclic(
struct dma_chan *chan, dma_addr_t dma_addr, size_t buf_len,
size_t period_len, enum dma_data_direction direction)
size_t period_len, enum dma_transfer_direction direction)
{
struct sdma_channel *sdmac = to_sdma_chan(chan);
struct sdma_engine *sdma = sdmac->sdma;
@ -1093,7 +1100,7 @@ static int sdma_control(struct dma_chan *chan, enum dma_ctrl_cmd cmd,
sdma_disable_channel(sdmac);
return 0;
case DMA_SLAVE_CONFIG:
if (dmaengine_cfg->direction == DMA_FROM_DEVICE) {
if (dmaengine_cfg->direction == DMA_DEV_TO_MEM) {
sdmac->per_address = dmaengine_cfg->src_addr;
sdmac->watermark_level = dmaengine_cfg->src_maxburst;
sdmac->word_size = dmaengine_cfg->src_addr_width;
@ -1102,6 +1109,7 @@ static int sdma_control(struct dma_chan *chan, enum dma_ctrl_cmd cmd,
sdmac->watermark_level = dmaengine_cfg->dst_maxburst;
sdmac->word_size = dmaengine_cfg->dst_addr_width;
}
sdmac->direction = dmaengine_cfg->direction;
return sdma_config_channel(sdmac);
default:
return -ENOSYS;
@ -1119,7 +1127,8 @@ static enum dma_status sdma_tx_status(struct dma_chan *chan,
last_used = chan->cookie;
dma_set_tx_state(txstate, sdmac->last_completed, last_used, 0);
dma_set_tx_state(txstate, sdmac->last_completed, last_used,
sdmac->chn_count - sdmac->chn_real_count);
return sdmac->status;
}

39
drivers/dma/intel_mid_dma.c
View File

@ -280,7 +280,8 @@ static void midc_dostart(struct intel_mid_dma_chan *midc,
* callbacks but must be called with the lock held.
*/
static void midc_descriptor_complete(struct intel_mid_dma_chan *midc,
struct intel_mid_dma_desc *desc)
struct intel_mid_dma_desc *desc)
__releases(&midc->lock) __acquires(&midc->lock)
{
struct dma_async_tx_descriptor *txd = &desc->txd;
dma_async_tx_callback callback_txd = NULL;
@ -311,6 +312,7 @@ static void midc_descriptor_complete(struct intel_mid_dma_chan *midc,
pci_pool_free(desc->lli_pool, desc->lli,
desc->lli_phys);
pci_pool_destroy(desc->lli_pool);
desc->lli = NULL;
}
list_move(&desc->desc_node, &midc->free_list);
midc->busy = false;
@ -395,10 +397,10 @@ static int midc_lli_fill_sg(struct intel_mid_dma_chan *midc,
midc->dma->block_size);
/*Populate SAR and DAR values*/
sg_phy_addr = sg_phys(sg);
if (desc->dirn == DMA_TO_DEVICE) {
if (desc->dirn == DMA_MEM_TO_DEV) {
lli_bloc_desc->sar = sg_phy_addr;
lli_bloc_desc->dar = mids->dma_slave.dst_addr;
} else if (desc->dirn == DMA_FROM_DEVICE) {
} else if (desc->dirn == DMA_DEV_TO_MEM) {
lli_bloc_desc->sar = mids->dma_slave.src_addr;
lli_bloc_desc->dar = sg_phy_addr;
}
@ -490,7 +492,9 @@ static enum dma_status intel_mid_dma_tx_status(struct dma_chan *chan,
ret = dma_async_is_complete(cookie, last_complete, last_used);
if (ret != DMA_SUCCESS) {
spin_lock_bh(&midc->lock);
midc_scan_descriptors(to_middma_device(chan->device), midc);
spin_unlock_bh(&midc->lock);
last_complete = midc->completed;
last_used = chan->cookie;
@ -566,6 +570,7 @@ static int intel_mid_dma_device_control(struct dma_chan *chan,
pci_pool_free(desc->lli_pool, desc->lli,
desc->lli_phys);
pci_pool_destroy(desc->lli_pool);
desc->lli = NULL;
}
list_move(&desc->desc_node, &midc->free_list);
}
@ -632,13 +637,13 @@ static struct dma_async_tx_descriptor *intel_mid_dma_prep_memcpy(
if (midc->dma->pimr_mask) {
cfg_hi.cfgx.protctl = 0x0; /*default value*/
cfg_hi.cfgx.fifo_mode = 1;
if (mids->dma_slave.direction == DMA_TO_DEVICE) {
if (mids->dma_slave.direction == DMA_MEM_TO_DEV) {
cfg_hi.cfgx.src_per = 0;
if (mids->device_instance == 0)
cfg_hi.cfgx.dst_per = 3;
if (mids->device_instance == 1)
cfg_hi.cfgx.dst_per = 1;
} else if (mids->dma_slave.direction == DMA_FROM_DEVICE) {
} else if (mids->dma_slave.direction == DMA_DEV_TO_MEM) {
if (mids->device_instance == 0)
cfg_hi.cfgx.src_per = 2;
if (mids->device_instance == 1)
@ -682,11 +687,11 @@ static struct dma_async_tx_descriptor *intel_mid_dma_prep_memcpy(
ctl_lo.ctlx.sinc = 0;
ctl_lo.ctlx.dinc = 0;
} else {
if (mids->dma_slave.direction == DMA_TO_DEVICE) {
if (mids->dma_slave.direction == DMA_MEM_TO_DEV) {
ctl_lo.ctlx.sinc = 0;
ctl_lo.ctlx.dinc = 2;
ctl_lo.ctlx.tt_fc = 1;
} else if (mids->dma_slave.direction == DMA_FROM_DEVICE) {
} else if (mids->dma_slave.direction == DMA_DEV_TO_MEM) {
ctl_lo.ctlx.sinc = 2;
ctl_lo.ctlx.dinc = 0;
ctl_lo.ctlx.tt_fc = 2;
@ -732,7 +737,7 @@ err_desc_get:
*/
static struct dma_async_tx_descriptor *intel_mid_dma_prep_slave_sg(
struct dma_chan *chan, struct scatterlist *sgl,
unsigned int sg_len, enum dma_data_direction direction,
unsigned int sg_len, enum dma_transfer_direction direction,
unsigned long flags)
{
struct intel_mid_dma_chan *midc = NULL;
@ -868,7 +873,7 @@ static int intel_mid_dma_alloc_chan_resources(struct dma_chan *chan)
pm_runtime_get_sync(&mid->pdev->dev);
if (mid->state == SUSPENDED) {
if (dma_resume(mid->pdev)) {
if (dma_resume(&mid->pdev->dev)) {
pr_err("ERR_MDMA: resume failed");
return -EFAULT;
}
@ -1099,7 +1104,8 @@ static int mid_setup_dma(struct pci_dev *pdev)
LNW_PERIPHRAL_MASK_SIZE);
if (dma->mask_reg == NULL) {
pr_err("ERR_MDMA:Can't map periphral intr space !!\n");
return -ENOMEM;
err = -ENOMEM;
goto err_ioremap;
}
} else
dma->mask_reg = NULL;
@ -1196,6 +1202,9 @@ static int mid_setup_dma(struct pci_dev *pdev)
err_engine:
free_irq(pdev->irq, dma);
err_irq:
if (dma->mask_reg)
iounmap(dma->mask_reg);
err_ioremap:
pci_pool_destroy(dma->dma_pool);
err_dma_pool:
pr_err("ERR_MDMA:setup_dma failed: %d\n", err);
@ -1337,8 +1346,9 @@ static void __devexit intel_mid_dma_remove(struct pci_dev *pdev)
*
* This function is called by OS when a power event occurs
*/
int dma_suspend(struct pci_dev *pci, pm_message_t state)
static int dma_suspend(struct device *dev)
{
struct pci_dev *pci = to_pci_dev(dev);
int i;
struct middma_device *device = pci_get_drvdata(pci);
pr_debug("MDMA: dma_suspend called\n");
@ -1362,8 +1372,9 @@ int dma_suspend(struct pci_dev *pci, pm_message_t state)
*
* This function is called by OS when a power event occurs
*/
int dma_resume(struct pci_dev *pci)
int dma_resume(struct device *dev)
{
struct pci_dev *pci = to_pci_dev(dev);
int ret;
struct middma_device *device = pci_get_drvdata(pci);
@ -1429,6 +1440,8 @@ static const struct dev_pm_ops intel_mid_dma_pm = {
.runtime_suspend = dma_runtime_suspend,
.runtime_resume = dma_runtime_resume,
.runtime_idle = dma_runtime_idle,
.suspend = dma_suspend,
.resume = dma_resume,
};
static struct pci_driver intel_mid_dma_pci_driver = {
@ -1437,8 +1450,6 @@ static struct pci_driver intel_mid_dma_pci_driver = {
.probe = intel_mid_dma_probe,
.remove = __devexit_p(intel_mid_dma_remove),
#ifdef CONFIG_PM
.suspend = dma_suspend,
.resume = dma_resume,
.driver = {
.pm = &intel_mid_dma_pm,
},

4
drivers/dma/intel_mid_dma_regs.h
View File

@ -262,7 +262,7 @@ struct intel_mid_dma_desc {
unsigned int lli_length;
unsigned int current_lli;
dma_addr_t next;
enum dma_data_direction dirn;
enum dma_transfer_direction dirn;
enum dma_status status;
enum dma_slave_buswidth width; /*width of DMA txn*/
enum intel_mid_dma_mode cfg_mode; /*mode configuration*/
@ -296,6 +296,6 @@ static inline struct intel_mid_dma_slave *to_intel_mid_dma_slave
}
int dma_resume(struct pci_dev *pci);
int dma_resume(struct device *dev);
#endif /*__INTEL_MID_DMAC_REGS_H__*/

16
drivers/dma/iop-adma.c
View File

@ -1735,8 +1735,6 @@ static void iop_chan_start_null_xor(struct iop_adma_chan *iop_chan)
spin_unlock_bh(&iop_chan->lock);
}
MODULE_ALIAS("platform:iop-adma");
static struct platform_driver iop_adma_driver = {
.probe = iop_adma_probe,
.remove = __devexit_p(iop_adma_remove),
@ -1746,19 +1744,9 @@ static struct platform_driver iop_adma_driver = {
},
};
static int __init iop_adma_init (void)
{
return platform_driver_register(&iop_adma_driver);
}
static void __exit iop_adma_exit (void)
{
platform_driver_unregister(&iop_adma_driver);
return;
}
module_exit(iop_adma_exit);
module_init(iop_adma_init);
module_platform_driver(iop_adma_driver);
MODULE_AUTHOR("Intel Corporation");
MODULE_DESCRIPTION("IOP ADMA Engine Driver");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:iop-adma");

29
drivers/dma/ipu/ipu_idmac.c
View File

@ -312,7 +312,7 @@ static void ipu_ch_param_set_size(union chan_param_mem *params,
case IPU_PIX_FMT_RGB565:
params->ip.bpp = 2;
params->ip.pfs = 4;
params->ip.npb = 7;
params->ip.npb = 15;
params->ip.sat = 2; /* SAT = 32-bit access */
params->ip.ofs0 = 0; /* Red bit offset */
params->ip.ofs1 = 5; /* Green bit offset */
@ -422,12 +422,6 @@ static void ipu_ch_param_set_size(union chan_param_mem *params,
params->pp.nsb = 1;
}
static void ipu_ch_param_set_burst_size(union chan_param_mem *params,
uint16_t burst_pixels)
{
params->pp.npb = burst_pixels - 1;
}
static void ipu_ch_param_set_buffer(union chan_param_mem *params,
dma_addr_t buf0, dma_addr_t buf1)
{
@ -690,23 +684,6 @@ static int ipu_init_channel_buffer(struct idmac_channel *ichan,
ipu_ch_param_set_size(&params, pixel_fmt, width, height, stride_bytes);
ipu_ch_param_set_buffer(&params, phyaddr_0, phyaddr_1);
ipu_ch_param_set_rotation(&params, rot_mode);
/* Some channels (rotation) have restriction on burst length */
switch (channel) {
case IDMAC_IC_7: /* Hangs with burst 8, 16, other values
invalid - Table 44-30 */
/*
ipu_ch_param_set_burst_size(&params, 8);
*/
break;
case IDMAC_SDC_0:
case IDMAC_SDC_1:
/* In original code only IPU_PIX_FMT_RGB565 was setting burst */
ipu_ch_param_set_burst_size(&params, 16);
break;
case IDMAC_IC_0:
default:
break;
}
spin_lock_irqsave(&ipu->lock, flags);
@ -1364,7 +1341,7 @@ static void ipu_gc_tasklet(unsigned long arg)
/* Allocate and initialise a transfer descriptor. */
static struct dma_async_tx_descriptor *idmac_prep_slave_sg(struct dma_chan *chan,
struct scatterlist *sgl, unsigned int sg_len,
enum dma_data_direction direction, unsigned long tx_flags)
enum dma_transfer_direction direction, unsigned long tx_flags)
{
struct idmac_channel *ichan = to_idmac_chan(chan);
struct idmac_tx_desc *desc = NULL;
@ -1376,7 +1353,7 @@ static struct dma_async_tx_descriptor *idmac_prep_slave_sg(struct dma_chan *chan
chan->chan_id != IDMAC_IC_7)
return NULL;
if (direction != DMA_FROM_DEVICE && direction != DMA_TO_DEVICE) {
if (direction != DMA_DEV_TO_MEM && direction != DMA_MEM_TO_DEV) {
dev_err(chan->device->dev, "Invalid DMA direction %d!\n", direction);
return NULL;
}

12
drivers/dma/mpc512x_dma.c
View File

@ -835,17 +835,7 @@ static struct platform_driver mpc_dma_driver = {
},
};
static int __init mpc_dma_init(void)
{
return platform_driver_register(&mpc_dma_driver);
}
module_init(mpc_dma_init);
static void __exit mpc_dma_exit(void)
{
platform_driver_unregister(&mpc_dma_driver);
}
module_exit(mpc_dma_exit);
module_platform_driver(mpc_dma_driver);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Piotr Ziecik <kosmo@semihalf.com>");

53
drivers/dma/mxs-dma.c
View File

@ -44,7 +44,6 @@
#define HW_APBHX_CTRL0 0x000
#define BM_APBH_CTRL0_APB_BURST8_EN (1 << 29)
#define BM_APBH_CTRL0_APB_BURST_EN (1 << 28)
#define BP_APBH_CTRL0_CLKGATE_CHANNEL 8
#define BP_APBH_CTRL0_RESET_CHANNEL 16
#define HW_APBHX_CTRL1 0x010
#define HW_APBHX_CTRL2 0x020
@ -111,6 +110,7 @@ struct mxs_dma_chan {
int chan_irq;
struct mxs_dma_ccw *ccw;
dma_addr_t ccw_phys;
int desc_count;
dma_cookie_t last_completed;
enum dma_status status;
unsigned int flags;
@ -130,23 +130,6 @@ struct mxs_dma_engine {
struct mxs_dma_chan mxs_chans[MXS_DMA_CHANNELS];
};
static inline void mxs_dma_clkgate(struct mxs_dma_chan *mxs_chan, int enable)
{
struct mxs_dma_engine *mxs_dma = mxs_chan->mxs_dma;
int chan_id = mxs_chan->chan.chan_id;
int set_clr = enable ? MXS_CLR_ADDR : MXS_SET_ADDR;
/* enable apbh channel clock */
if (dma_is_apbh()) {
if (apbh_is_old())
writel(1 << (chan_id + BP_APBH_CTRL0_CLKGATE_CHANNEL),
mxs_dma->base + HW_APBHX_CTRL0 + set_clr);
else
writel(1 << chan_id,
mxs_dma->base + HW_APBHX_CTRL0 + set_clr);
}
}
static void mxs_dma_reset_chan(struct mxs_dma_chan *mxs_chan)
{
struct mxs_dma_engine *mxs_dma = mxs_chan->mxs_dma;
@ -165,9 +148,6 @@ static void mxs_dma_enable_chan(struct mxs_dma_chan *mxs_chan)
struct mxs_dma_engine *mxs_dma = mxs_chan->mxs_dma;
int chan_id = mxs_chan->chan.chan_id;
/* clkgate needs to be enabled before writing other registers */
mxs_dma_clkgate(mxs_chan, 1);
/* set cmd_addr up */
writel(mxs_chan->ccw_phys,
mxs_dma->base + HW_APBHX_CHn_NXTCMDAR(chan_id));
@ -178,9 +158,6 @@ static void mxs_dma_enable_chan(struct mxs_dma_chan *mxs_chan)
static void mxs_dma_disable_chan(struct mxs_dma_chan *mxs_chan)
{
/* disable apbh channel clock */
mxs_dma_clkgate(mxs_chan, 0);
mxs_chan->status = DMA_SUCCESS;
}
@ -268,7 +245,7 @@ static irqreturn_t mxs_dma_int_handler(int irq, void *dev_id)
/*
* When both completion and error of termination bits set at the
* same time, we do not take it as an error. IOW, it only becomes
* an error we need to handler here in case of ether it's (1) an bus
* an error we need to handle here in case of either it's (1) a bus
* error or (2) a termination error with no completion.
*/
stat2 = ((stat2 >> MXS_DMA_CHANNELS) & stat2) | /* (1) */
@ -338,10 +315,7 @@ static int mxs_dma_alloc_chan_resources(struct dma_chan *chan)
if (ret)
goto err_clk;
/* clkgate needs to be enabled for reset to finish */
mxs_dma_clkgate(mxs_chan, 1);
mxs_dma_reset_chan(mxs_chan);
mxs_dma_clkgate(mxs_chan, 0);
dma_async_tx_descriptor_init(&mxs_chan->desc, chan);
mxs_chan->desc.tx_submit = mxs_dma_tx_submit;
@ -377,7 +351,7 @@ static void mxs_dma_free_chan_resources(struct dma_chan *chan)
static struct dma_async_tx_descriptor *mxs_dma_prep_slave_sg(
struct dma_chan *chan, struct scatterlist *sgl,
unsigned int sg_len, enum dma_data_direction direction,
unsigned int sg_len, enum dma_transfer_direction direction,
unsigned long append)
{
struct mxs_dma_chan *mxs_chan = to_mxs_dma_chan(chan);
@ -386,7 +360,7 @@ static struct dma_async_tx_descriptor *mxs_dma_prep_slave_sg(
struct scatterlist *sg;
int i, j;
u32 *pio;
static int idx;
int idx = append ? mxs_chan->desc_count : 0;
if (mxs_chan->status == DMA_IN_PROGRESS && !append)
return NULL;
@ -417,7 +391,7 @@ static struct dma_async_tx_descriptor *mxs_dma_prep_slave_sg(
idx = 0;
}
if (direction == DMA_NONE) {
if (direction == DMA_TRANS_NONE) {
ccw = &mxs_chan->ccw[idx++];
pio = (u32 *) sgl;
@ -450,7 +424,7 @@ static struct dma_async_tx_descriptor *mxs_dma_prep_slave_sg(
ccw->bits |= CCW_CHAIN;
ccw->bits |= CCW_HALT_ON_TERM;
ccw->bits |= CCW_TERM_FLUSH;
ccw->bits |= BF_CCW(direction == DMA_FROM_DEVICE ?
ccw->bits |= BF_CCW(direction == DMA_DEV_TO_MEM ?
MXS_DMA_CMD_WRITE : MXS_DMA_CMD_READ,
COMMAND);
@ -462,6 +436,7 @@ static struct dma_async_tx_descriptor *mxs_dma_prep_slave_sg(
}
}
}
mxs_chan->desc_count = idx;
return &mxs_chan->desc;
@ -472,7 +447,7 @@ err_out:
static struct dma_async_tx_descriptor *mxs_dma_prep_dma_cyclic(
struct dma_chan *chan, dma_addr_t dma_addr, size_t buf_len,
size_t period_len, enum dma_data_direction direction)
size_t period_len, enum dma_transfer_direction direction)
{
struct mxs_dma_chan *mxs_chan = to_mxs_dma_chan(chan);
struct mxs_dma_engine *mxs_dma = mxs_chan->mxs_dma;
@ -515,7 +490,7 @@ static struct dma_async_tx_descriptor *mxs_dma_prep_dma_cyclic(
ccw->bits |= CCW_IRQ;
ccw->bits |= CCW_HALT_ON_TERM;
ccw->bits |= CCW_TERM_FLUSH;
ccw->bits |= BF_CCW(direction == DMA_FROM_DEVICE ?
ccw->bits |= BF_CCW(direction == DMA_DEV_TO_MEM ?
MXS_DMA_CMD_WRITE : MXS_DMA_CMD_READ, COMMAND);
dma_addr += period_len;
@ -523,6 +498,7 @@ static struct dma_async_tx_descriptor *mxs_dma_prep_dma_cyclic(
i++;
}
mxs_chan->desc_count = i;
return &mxs_chan->desc;
@ -539,8 +515,8 @@ static int mxs_dma_control(struct dma_chan *chan, enum dma_ctrl_cmd cmd,
switch (cmd) {
case DMA_TERMINATE_ALL:
mxs_dma_disable_chan(mxs_chan);
mxs_dma_reset_chan(mxs_chan);
mxs_dma_disable_chan(mxs_chan);
break;
case DMA_PAUSE:
mxs_dma_pause_chan(mxs_chan);
@ -580,7 +556,7 @@ static int __init mxs_dma_init(struct mxs_dma_engine *mxs_dma)
ret = clk_prepare_enable(mxs_dma->clk);
if (ret)
goto err_out;
return ret;
ret = mxs_reset_block(mxs_dma->base);
if (ret)
@ -604,11 +580,8 @@ static int __init mxs_dma_init(struct mxs_dma_engine *mxs_dma)
writel(MXS_DMA_CHANNELS_MASK << MXS_DMA_CHANNELS,
mxs_dma->base + HW_APBHX_CTRL1 + MXS_SET_ADDR);
clk_disable_unprepare(mxs_dma->clk);
return 0;
err_out:
clk_disable_unprepare(mxs_dma->clk);
return ret;
}

20
drivers/dma/pch_dma.c
View File

@ -1,7 +1,7 @@
/*
* Topcliff PCH DMA controller driver
* Copyright (c) 2010 Intel Corporation
* Copyright (C) 2011 OKI SEMICONDUCTOR CO., LTD.
* Copyright (C) 2011 LAPIS Semiconductor Co., Ltd.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
@ -99,7 +99,7 @@ struct pch_dma_desc {
struct pch_dma_chan {
struct dma_chan chan;
void __iomem *membase;
enum dma_data_direction dir;
enum dma_transfer_direction dir;
struct tasklet_struct tasklet;
unsigned long err_status;
@ -224,7 +224,7 @@ static void pdc_set_dir(struct dma_chan *chan)
mask_ctl = DMA_MASK_CTL0_MODE & ~(DMA_CTL0_MODE_MASK_BITS <<
(DMA_CTL0_BITS_PER_CH * chan->chan_id));
val &= mask_mode;
if (pd_chan->dir == DMA_TO_DEVICE)
if (pd_chan->dir == DMA_MEM_TO_DEV)
val |= 0x1 << (DMA_CTL0_BITS_PER_CH * chan->chan_id +
DMA_CTL0_DIR_SHIFT_BITS);
else
@ -242,7 +242,7 @@ static void pdc_set_dir(struct dma_chan *chan)
mask_ctl = DMA_MASK_CTL2_MODE & ~(DMA_CTL0_MODE_MASK_BITS <<
(DMA_CTL0_BITS_PER_CH * ch));
val &= mask_mode;
if (pd_chan->dir == DMA_TO_DEVICE)
if (pd_chan->dir == DMA_MEM_TO_DEV)
val |= 0x1 << (DMA_CTL0_BITS_PER_CH * ch +
DMA_CTL0_DIR_SHIFT_BITS);
else
@ -607,7 +607,7 @@ static void pd_issue_pending(struct dma_chan *chan)
static struct dma_async_tx_descriptor *pd_prep_slave_sg(struct dma_chan *chan,
struct scatterlist *sgl, unsigned int sg_len,
enum dma_data_direction direction, unsigned long flags)
enum dma_transfer_direction direction, unsigned long flags)
{
struct pch_dma_chan *pd_chan = to_pd_chan(chan);
struct pch_dma_slave *pd_slave = chan->private;
@ -623,9 +623,9 @@ static struct dma_async_tx_descriptor *pd_prep_slave_sg(struct dma_chan *chan,
return NULL;
}
if (direction == DMA_FROM_DEVICE)
if (direction == DMA_DEV_TO_MEM)
reg = pd_slave->rx_reg;
else if (direction == DMA_TO_DEVICE)
else if (direction == DMA_MEM_TO_DEV)
reg = pd_slave->tx_reg;
else
return NULL;
@ -1018,6 +1018,8 @@ static void __devexit pch_dma_remove(struct pci_dev *pdev)
#define PCI_DEVICE_ID_ML7223_DMA2_4CH 0x800E
#define PCI_DEVICE_ID_ML7223_DMA3_4CH 0x8017
#define PCI_DEVICE_ID_ML7223_DMA4_4CH 0x803B
#define PCI_DEVICE_ID_ML7831_DMA1_8CH 0x8810
#define PCI_DEVICE_ID_ML7831_DMA2_4CH 0x8815
DEFINE_PCI_DEVICE_TABLE(pch_dma_id_table) = {
{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_EG20T_PCH_DMA_8CH), 8 },
@ -1030,6 +1032,8 @@ DEFINE_PCI_DEVICE_TABLE(pch_dma_id_table) = {
{ PCI_VDEVICE(ROHM, PCI_DEVICE_ID_ML7223_DMA2_4CH), 4}, /* Video SPI */
{ PCI_VDEVICE(ROHM, PCI_DEVICE_ID_ML7223_DMA3_4CH), 4}, /* Security */
{ PCI_VDEVICE(ROHM, PCI_DEVICE_ID_ML7223_DMA4_4CH), 4}, /* FPGA */
{ PCI_VDEVICE(ROHM, PCI_DEVICE_ID_ML7831_DMA1_8CH), 8}, /* UART */
{ PCI_VDEVICE(ROHM, PCI_DEVICE_ID_ML7831_DMA2_4CH), 4}, /* SPI */
{ 0, },
};
@ -1057,7 +1061,7 @@ static void __exit pch_dma_exit(void)
module_init(pch_dma_init);
module_exit(pch_dma_exit);
MODULE_DESCRIPTION("Intel EG20T PCH / OKI SEMICONDUCTOR ML7213 IOH "
MODULE_DESCRIPTION("Intel EG20T PCH / LAPIS Semicon ML7213/ML7223/ML7831 IOH "
"DMA controller driver");
MODULE_AUTHOR("Yong Wang <yong.y.wang@intel.com>");
MODULE_LICENSE("GPL v2");

31
drivers/dma/pl330.c
View File

@ -350,14 +350,14 @@ static int pl330_control(struct dma_chan *chan, enum dma_ctrl_cmd cmd, unsigned
case DMA_SLAVE_CONFIG:
slave_config = (struct dma_slave_config *)arg;
if (slave_config->direction == DMA_TO_DEVICE) {
if (slave_config->direction == DMA_MEM_TO_DEV) {
if (slave_config->dst_addr)
pch->fifo_addr = slave_config->dst_addr;
if (slave_config->dst_addr_width)
pch->burst_sz = __ffs(slave_config->dst_addr_width);
if (slave_config->dst_maxburst)
pch->burst_len = slave_config->dst_maxburst;
} else if (slave_config->direction == DMA_FROM_DEVICE) {
} else if (slave_config->direction == DMA_DEV_TO_MEM) {
if (slave_config->src_addr)
pch->fifo_addr = slave_config->src_addr;
if (slave_config->src_addr_width)
@ -621,7 +621,7 @@ static inline int get_burst_len(struct dma_pl330_desc *desc, size_t len)
static struct dma_async_tx_descriptor *pl330_prep_dma_cyclic(
struct dma_chan *chan, dma_addr_t dma_addr, size_t len,
size_t period_len, enum dma_data_direction direction)
size_t period_len, enum dma_transfer_direction direction)
{
struct dma_pl330_desc *desc;
struct dma_pl330_chan *pch = to_pchan(chan);
@ -636,14 +636,14 @@ static struct dma_async_tx_descriptor *pl330_prep_dma_cyclic(
}
switch (direction) {
case DMA_TO_DEVICE:
case DMA_MEM_TO_DEV:
desc->rqcfg.src_inc = 1;
desc->rqcfg.dst_inc = 0;
desc->req.rqtype = MEMTODEV;
src = dma_addr;
dst = pch->fifo_addr;
break;
case DMA_FROM_DEVICE:
case DMA_DEV_TO_MEM:
desc->rqcfg.src_inc = 0;
desc->rqcfg.dst_inc = 1;
desc->req.rqtype = DEVTOMEM;
@ -710,7 +710,7 @@ pl330_prep_dma_memcpy(struct dma_chan *chan, dma_addr_t dst,
static struct dma_async_tx_descriptor *
pl330_prep_slave_sg(struct dma_chan *chan, struct scatterlist *sgl,
unsigned int sg_len, enum dma_data_direction direction,
unsigned int sg_len, enum dma_transfer_direction direction,
unsigned long flg)
{
struct dma_pl330_desc *first, *desc = NULL;
@ -759,7 +759,7 @@ pl330_prep_slave_sg(struct dma_chan *chan, struct scatterlist *sgl,
else
list_add_tail(&desc->node, &first->node);
if (direction == DMA_TO_DEVICE) {
if (direction == DMA_MEM_TO_DEV) {
desc->rqcfg.src_inc = 1;
desc->rqcfg.dst_inc = 0;
desc->req.rqtype = MEMTODEV;
@ -834,17 +834,7 @@ pl330_probe(struct amba_device *adev, const struct amba_id *id)
amba_set_drvdata(adev, pdmac);
#ifdef CONFIG_PM_RUNTIME
/* to use the runtime PM helper functions */
pm_runtime_enable(&adev->dev);
/* enable the power domain */
if (pm_runtime_get_sync(&adev->dev)) {
dev_err(&adev->dev, "failed to get runtime pm\n");
ret = -ENODEV;
goto probe_err1;
}
#else
#ifndef CONFIG_PM_RUNTIME
/* enable dma clk */
clk_enable(pdmac->clk);
#endif
@ -977,10 +967,7 @@ static int __devexit pl330_remove(struct amba_device *adev)
res = &adev->res;
release_mem_region(res->start, resource_size(res));
#ifdef CONFIG_PM_RUNTIME
pm_runtime_put(&adev->dev);
pm_runtime_disable(&adev->dev);
#else
#ifndef CONFIG_PM_RUNTIME
clk_disable(pdmac->clk);
#endif

72
drivers/dma/shdma.c
View File

@ -23,7 +23,6 @@
#include <linux/interrupt.h>
#include <linux/dmaengine.h>
#include <linux/delay.h>
#include <linux/dma-mapping.h>
#include <linux/platform_device.h>
#include <linux/pm_runtime.h>
#include <linux/sh_dma.h>
@ -57,6 +56,15 @@ static LIST_HEAD(sh_dmae_devices);
static unsigned long sh_dmae_slave_used[BITS_TO_LONGS(SH_DMA_SLAVE_NUMBER)];
static void sh_dmae_chan_ld_cleanup(struct sh_dmae_chan *sh_chan, bool all);
static void sh_chan_xfer_ld_queue(struct sh_dmae_chan *sh_chan);
static void chclr_write(struct sh_dmae_chan *sh_dc, u32 data)
{
struct sh_dmae_device *shdev = to_sh_dev(sh_dc);
__raw_writel(data, shdev->chan_reg +
shdev->pdata->channel[sh_dc->id].chclr_offset);
}
static void sh_dmae_writel(struct sh_dmae_chan *sh_dc, u32 data, u32 reg)
{
@ -129,6 +137,15 @@ static int sh_dmae_rst(struct sh_dmae_device *shdev)
dmaor = dmaor_read(shdev) & ~(DMAOR_NMIF | DMAOR_AE | DMAOR_DME);
if (shdev->pdata->chclr_present) {
int i;
for (i = 0; i < shdev->pdata->channel_num; i++) {
struct sh_dmae_chan *sh_chan = shdev->chan[i];
if (sh_chan)
chclr_write(sh_chan, 0);
}
}
dmaor_write(shdev, dmaor | shdev->pdata->dmaor_init);
dmaor = dmaor_read(shdev);
@ -139,6 +156,10 @@ static int sh_dmae_rst(struct sh_dmae_device *shdev)
dev_warn(shdev->common.dev, "Can't initialize DMAOR.\n");
return -EIO;
}
if (shdev->pdata->dmaor_init & ~dmaor)
dev_warn(shdev->common.dev,
"DMAOR=0x%x hasn't latched the initial value 0x%x.\n",
dmaor, shdev->pdata->dmaor_init);
return 0;
}
@ -259,8 +280,6 @@ static int dmae_set_dmars(struct sh_dmae_chan *sh_chan, u16 val)
return 0;
}
static void sh_chan_xfer_ld_queue(struct sh_dmae_chan *sh_chan);
static dma_cookie_t sh_dmae_tx_submit(struct dma_async_tx_descriptor *tx)
{
struct sh_desc *desc = tx_to_sh_desc(tx), *chunk, *last = desc, *c;
@ -340,6 +359,8 @@ static dma_cookie_t sh_dmae_tx_submit(struct dma_async_tx_descriptor *tx)
sh_chan_xfer_ld_queue(sh_chan);
sh_chan->pm_state = DMAE_PM_ESTABLISHED;
}
} else {
sh_chan->pm_state = DMAE_PM_PENDING;
}
spin_unlock_irq(&sh_chan->desc_lock);
@ -479,19 +500,19 @@ static void sh_dmae_free_chan_resources(struct dma_chan *chan)
* @sh_chan: DMA channel
* @flags: DMA transfer flags
* @dest: destination DMA address, incremented when direction equals
* DMA_FROM_DEVICE or DMA_BIDIRECTIONAL
* DMA_DEV_TO_MEM
* @src: source DMA address, incremented when direction equals
* DMA_TO_DEVICE or DMA_BIDIRECTIONAL
* DMA_MEM_TO_DEV
* @len: DMA transfer length
* @first: if NULL, set to the current descriptor and cookie set to -EBUSY
* @direction: needed for slave DMA to decide which address to keep constant,
* equals DMA_BIDIRECTIONAL for MEMCPY
* equals DMA_MEM_TO_MEM for MEMCPY
* Returns 0 or an error
* Locks: called with desc_lock held
*/
static struct sh_desc *sh_dmae_add_desc(struct sh_dmae_chan *sh_chan,
unsigned long flags, dma_addr_t *dest, dma_addr_t *src, size_t *len,
struct sh_desc **first, enum dma_data_direction direction)
struct sh_desc **first, enum dma_transfer_direction direction)
{
struct sh_desc *new;
size_t copy_size;
@ -531,9 +552,9 @@ static struct sh_desc *sh_dmae_add_desc(struct sh_dmae_chan *sh_chan,
new->direction = direction;
*len -= copy_size;
if (direction == DMA_BIDIRECTIONAL || direction == DMA_TO_DEVICE)
if (direction == DMA_MEM_TO_MEM || direction == DMA_MEM_TO_DEV)
*src += copy_size;
if (direction == DMA_BIDIRECTIONAL || direction == DMA_FROM_DEVICE)
if (direction == DMA_MEM_TO_MEM || direction == DMA_DEV_TO_MEM)
*dest += copy_size;
return new;
@ -546,12 +567,12 @@ static struct sh_desc *sh_dmae_add_desc(struct sh_dmae_chan *sh_chan,
* converted to scatter-gather to guarantee consistent locking and a correct
* list manipulation. For slave DMA direction carries the usual meaning, and,
* logically, the SG list is RAM and the addr variable contains slave address,
* e.g., the FIFO I/O register. For MEMCPY direction equals DMA_BIDIRECTIONAL
* e.g., the FIFO I/O register. For MEMCPY direction equals DMA_MEM_TO_MEM
* and the SG list contains only one element and points at the source buffer.
*/
static struct dma_async_tx_descriptor *sh_dmae_prep_sg(struct sh_dmae_chan *sh_chan,
struct scatterlist *sgl, unsigned int sg_len, dma_addr_t *addr,
enum dma_data_direction direction, unsigned long flags)
enum dma_transfer_direction direction, unsigned long flags)
{
struct scatterlist *sg;
struct sh_desc *first = NULL, *new = NULL /* compiler... */;
@ -592,7 +613,7 @@ static struct dma_async_tx_descriptor *sh_dmae_prep_sg(struct sh_dmae_chan *sh_c
dev_dbg(sh_chan->dev, "Add SG #%d@%p[%d], dma %llx\n",
i, sg, len, (unsigned long long)sg_addr);
if (direction == DMA_FROM_DEVICE)
if (direction == DMA_DEV_TO_MEM)
new = sh_dmae_add_desc(sh_chan, flags,
&sg_addr, addr, &len, &first,
direction);
@ -646,13 +667,13 @@ static struct dma_async_tx_descriptor *sh_dmae_prep_memcpy(
sg_dma_address(&sg) = dma_src;
sg_dma_len(&sg) = len;
return sh_dmae_prep_sg(sh_chan, &sg, 1, &dma_dest, DMA_BIDIRECTIONAL,
return sh_dmae_prep_sg(sh_chan, &sg, 1, &dma_dest, DMA_MEM_TO_MEM,
flags);
}
static struct dma_async_tx_descriptor *sh_dmae_prep_slave_sg(
struct dma_chan *chan, struct scatterlist *sgl, unsigned int sg_len,
enum dma_data_direction direction, unsigned long flags)
enum dma_transfer_direction direction, unsigned long flags)
{
struct sh_dmae_slave *param;
struct sh_dmae_chan *sh_chan;
@ -996,7 +1017,7 @@ static void dmae_do_tasklet(unsigned long data)
spin_lock_irq(&sh_chan->desc_lock);
list_for_each_entry(desc, &sh_chan->ld_queue, node) {
if (desc->mark == DESC_SUBMITTED &&
((desc->direction == DMA_FROM_DEVICE &&
((desc->direction == DMA_DEV_TO_MEM &&
(desc->hw.dar + desc->hw.tcr) == dar_buf) ||
(desc->hw.sar + desc->hw.tcr) == sar_buf)) {
dev_dbg(sh_chan->dev, "done #%d@%p dst %u\n",
@ -1225,6 +1246,8 @@ static int __init sh_dmae_probe(struct platform_device *pdev)
platform_set_drvdata(pdev, shdev);
shdev->common.dev = &pdev->dev;
pm_runtime_enable(&pdev->dev);
pm_runtime_get_sync(&pdev->dev);
@ -1254,7 +1277,6 @@ static int __init sh_dmae_probe(struct platform_device *pdev)
shdev->common.device_prep_slave_sg = sh_dmae_prep_slave_sg;
shdev->common.device_control = sh_dmae_control;
shdev->common.dev = &pdev->dev;
/* Default transfer size of 32 bytes requires 32-byte alignment */
shdev->common.copy_align = LOG2_DEFAULT_XFER_SIZE;
@ -1435,22 +1457,17 @@ static int sh_dmae_runtime_resume(struct device *dev)
#ifdef CONFIG_PM
static int sh_dmae_suspend(struct device *dev)
{
struct sh_dmae_device *shdev = dev_get_drvdata(dev);
int i;
for (i = 0; i < shdev->pdata->channel_num; i++) {
struct sh_dmae_chan *sh_chan = shdev->chan[i];
if (sh_chan->descs_allocated)
sh_chan->pm_error = pm_runtime_put_sync(dev);
}
return 0;
}
static int sh_dmae_resume(struct device *dev)
{
struct sh_dmae_device *shdev = dev_get_drvdata(dev);
int i;
int i, ret;
ret = sh_dmae_rst(shdev);
if (ret < 0)
dev_err(dev, "Failed to reset!\n");
for (i = 0; i < shdev->pdata->channel_num; i++) {
struct sh_dmae_chan *sh_chan = shdev->chan[i];
@ -1459,9 +1476,6 @@ static int sh_dmae_resume(struct device *dev)
if (!sh_chan->descs_allocated)
continue;
if (!sh_chan->pm_error)
pm_runtime_get_sync(dev);
if (param) {
const struct sh_dmae_slave_config *cfg = param->config;
dmae_set_dmars(sh_chan, cfg->mid_rid);

707
drivers/dma/sirf-dma.c Normal file
View File

@ -0,0 +1,707 @@
/*
* DMA controller driver for CSR SiRFprimaII
*
* Copyright (c) 2011 Cambridge Silicon Radio Limited, a CSR plc group company.
*
* Licensed under GPLv2 or later.
*/
#include <linux/module.h>
#include <linux/dmaengine.h>
#include <linux/dma-mapping.h>
#include <linux/interrupt.h>
#include <linux/io.h>
#include <linux/slab.h>
#include <linux/of_irq.h>
#include <linux/of_address.h>
#include <linux/of_device.h>
#include <linux/of_platform.h>
#include <linux/sirfsoc_dma.h>
#define SIRFSOC_DMA_DESCRIPTORS 16
#define SIRFSOC_DMA_CHANNELS 16
#define SIRFSOC_DMA_CH_ADDR 0x00
#define SIRFSOC_DMA_CH_XLEN 0x04
#define SIRFSOC_DMA_CH_YLEN 0x08
#define SIRFSOC_DMA_CH_CTRL 0x0C
#define SIRFSOC_DMA_WIDTH_0 0x100
#define SIRFSOC_DMA_CH_VALID 0x140
#define SIRFSOC_DMA_CH_INT 0x144
#define SIRFSOC_DMA_INT_EN 0x148
#define SIRFSOC_DMA_CH_LOOP_CTRL 0x150
#define SIRFSOC_DMA_MODE_CTRL_BIT 4
#define SIRFSOC_DMA_DIR_CTRL_BIT 5
/* xlen and dma_width register is in 4 bytes boundary */
#define SIRFSOC_DMA_WORD_LEN 4
struct sirfsoc_dma_desc {
struct dma_async_tx_descriptor desc;
struct list_head node;
/* SiRFprimaII 2D-DMA parameters */
int xlen; /* DMA xlen */
int ylen; /* DMA ylen */
int width; /* DMA width */
int dir;
bool cyclic; /* is loop DMA? */
u32 addr; /* DMA buffer address */
};
struct sirfsoc_dma_chan {
struct dma_chan chan;
struct list_head free;
struct list_head prepared;
struct list_head queued;
struct list_head active;
struct list_head completed;
dma_cookie_t completed_cookie;
unsigned long happened_cyclic;
unsigned long completed_cyclic;
/* Lock for this structure */
spinlock_t lock;
int mode;
};
struct sirfsoc_dma {
struct dma_device dma;
struct tasklet_struct tasklet;
struct sirfsoc_dma_chan channels[SIRFSOC_DMA_CHANNELS];
void __iomem *base;
int irq;
};
#define DRV_NAME "sirfsoc_dma"
/* Convert struct dma_chan to struct sirfsoc_dma_chan */
static inline
struct sirfsoc_dma_chan *dma_chan_to_sirfsoc_dma_chan(struct dma_chan *c)
{
return container_of(c, struct sirfsoc_dma_chan, chan);
}
/* Convert struct dma_chan to struct sirfsoc_dma */
static inline struct sirfsoc_dma *dma_chan_to_sirfsoc_dma(struct dma_chan *c)
{
struct sirfsoc_dma_chan *schan = dma_chan_to_sirfsoc_dma_chan(c);
return container_of(schan, struct sirfsoc_dma, channels[c->chan_id]);
}
/* Execute all queued DMA descriptors */
static void sirfsoc_dma_execute(struct sirfsoc_dma_chan *schan)
{
struct sirfsoc_dma *sdma = dma_chan_to_sirfsoc_dma(&schan->chan);
int cid = schan->chan.chan_id;
struct sirfsoc_dma_desc *sdesc = NULL;
/*
* lock has been held by functions calling this, so we don't hold
* lock again
*/
sdesc = list_first_entry(&schan->queued, struct sirfsoc_dma_desc,
node);
/* Move the first queued descriptor to active list */
list_move_tail(&schan->queued, &schan->active);
/* Start the DMA transfer */
writel_relaxed(sdesc->width, sdma->base + SIRFSOC_DMA_WIDTH_0 +
cid * 4);
writel_relaxed(cid | (schan->mode << SIRFSOC_DMA_MODE_CTRL_BIT) |
(sdesc->dir << SIRFSOC_DMA_DIR_CTRL_BIT),
sdma->base + cid * 0x10 + SIRFSOC_DMA_CH_CTRL);
writel_relaxed(sdesc->xlen, sdma->base + cid * 0x10 +
SIRFSOC_DMA_CH_XLEN);
writel_relaxed(sdesc->ylen, sdma->base + cid * 0x10 +
SIRFSOC_DMA_CH_YLEN);
writel_relaxed(readl_relaxed(sdma->base + SIRFSOC_DMA_INT_EN) |
(1 << cid), sdma->base + SIRFSOC_DMA_INT_EN);
/*
* writel has an implict memory write barrier to make sure data is
* flushed into memory before starting DMA
*/
writel(sdesc->addr >> 2, sdma->base + cid * 0x10 + SIRFSOC_DMA_CH_ADDR);
if (sdesc->cyclic) {
writel((1 << cid) | 1 << (cid + 16) |
readl_relaxed(sdma->base + SIRFSOC_DMA_CH_LOOP_CTRL),
sdma->base + SIRFSOC_DMA_CH_LOOP_CTRL);
schan->happened_cyclic = schan->completed_cyclic = 0;
}
}
/* Interrupt handler */
static irqreturn_t sirfsoc_dma_irq(int irq, void *data)
{
struct sirfsoc_dma *sdma = data;
struct sirfsoc_dma_chan *schan;
struct sirfsoc_dma_desc *sdesc = NULL;
u32 is;
int ch;
is = readl(sdma->base + SIRFSOC_DMA_CH_INT);
while ((ch = fls(is) - 1) >= 0) {
is &= ~(1 << ch);
writel_relaxed(1 << ch, sdma->base + SIRFSOC_DMA_CH_INT);
schan = &sdma->channels[ch];
spin_lock(&schan->lock);
sdesc = list_first_entry(&schan->active, struct sirfsoc_dma_desc,
node);
if (!sdesc->cyclic) {
/* Execute queued descriptors */
list_splice_tail_init(&schan->active, &schan->completed);
if (!list_empty(&schan->queued))
sirfsoc_dma_execute(schan);
} else
schan->happened_cyclic++;
spin_unlock(&schan->lock);
}
/* Schedule tasklet */
tasklet_schedule(&sdma->tasklet);
return IRQ_HANDLED;
}
/* process completed descriptors */
static void sirfsoc_dma_process_completed(struct sirfsoc_dma *sdma)
{
dma_cookie_t last_cookie = 0;
struct sirfsoc_dma_chan *schan;
struct sirfsoc_dma_desc *sdesc;
struct dma_async_tx_descriptor *desc;
unsigned long flags;
unsigned long happened_cyclic;
LIST_HEAD(list);
int i;
for (i = 0; i < sdma->dma.chancnt; i++) {
schan = &sdma->channels[i];
/* Get all completed descriptors */
spin_lock_irqsave(&schan->lock, flags);
if (!list_empty(&schan->completed)) {
list_splice_tail_init(&schan->completed, &list);
spin_unlock_irqrestore(&schan->lock, flags);
/* Execute callbacks and run dependencies */
list_for_each_entry(sdesc, &list, node) {
desc = &sdesc->desc;
if (desc->callback)
desc->callback(desc->callback_param);
last_cookie = desc->cookie;
dma_run_dependencies(desc);
}
/* Free descriptors */
spin_lock_irqsave(&schan->lock, flags);
list_splice_tail_init(&list, &schan->free);
schan->completed_cookie = last_cookie;
spin_unlock_irqrestore(&schan->lock, flags);
} else {
/* for cyclic channel, desc is always in active list */
sdesc = list_first_entry(&schan->active, struct sirfsoc_dma_desc,
node);
if (!sdesc || (sdesc && !sdesc->cyclic)) {
/* without active cyclic DMA */
spin_unlock_irqrestore(&schan->lock, flags);
continue;
}
/* cyclic DMA */
happened_cyclic = schan->happened_cyclic;
spin_unlock_irqrestore(&schan->lock, flags);
desc = &sdesc->desc;
while (happened_cyclic != schan->completed_cyclic) {
if (desc->callback)
desc->callback(desc->callback_param);
schan->completed_cyclic++;
}
}
}
}
/* DMA Tasklet */
static void sirfsoc_dma_tasklet(unsigned long data)
{
struct sirfsoc_dma *sdma = (void *)data;
sirfsoc_dma_process_completed(sdma);
}
/* Submit descriptor to hardware */
static dma_cookie_t sirfsoc_dma_tx_submit(struct dma_async_tx_descriptor *txd)
{
struct sirfsoc_dma_chan *schan = dma_chan_to_sirfsoc_dma_chan(txd->chan);
struct sirfsoc_dma_desc *sdesc;
unsigned long flags;
dma_cookie_t cookie;
sdesc = container_of(txd, struct sirfsoc_dma_desc, desc);
spin_lock_irqsave(&schan->lock, flags);
/* Move descriptor to queue */
list_move_tail(&sdesc->node, &schan->queued);
/* Update cookie */
cookie = schan->chan.cookie + 1;
if (cookie <= 0)
cookie = 1;
schan->chan.cookie = cookie;
sdesc->desc.cookie = cookie;
spin_unlock_irqrestore(&schan->lock, flags);
return cookie;
}
static int sirfsoc_dma_slave_config(struct sirfsoc_dma_chan *schan,
struct dma_slave_config *config)
{
unsigned long flags;
if ((config->src_addr_width != DMA_SLAVE_BUSWIDTH_4_BYTES) ||
(config->dst_addr_width != DMA_SLAVE_BUSWIDTH_4_BYTES))
return -EINVAL;
spin_lock_irqsave(&schan->lock, flags);
schan->mode = (config->src_maxburst == 4 ? 1 : 0);
spin_unlock_irqrestore(&schan->lock, flags);
return 0;
}
static int sirfsoc_dma_terminate_all(struct sirfsoc_dma_chan *schan)
{
struct sirfsoc_dma *sdma = dma_chan_to_sirfsoc_dma(&schan->chan);
int cid = schan->chan.chan_id;
unsigned long flags;
writel_relaxed(readl_relaxed(sdma->base + SIRFSOC_DMA_INT_EN) &
~(1 << cid), sdma->base + SIRFSOC_DMA_INT_EN);
writel_relaxed(1 << cid, sdma->base + SIRFSOC_DMA_CH_VALID);
writel_relaxed(readl_relaxed(sdma->base + SIRFSOC_DMA_CH_LOOP_CTRL)
& ~((1 << cid) | 1 << (cid + 16)),
sdma->base + SIRFSOC_DMA_CH_LOOP_CTRL);
spin_lock_irqsave(&schan->lock, flags);
list_splice_tail_init(&schan->active, &schan->free);
list_splice_tail_init(&schan->queued, &schan->free);
spin_unlock_irqrestore(&schan->lock, flags);
return 0;
}
static int sirfsoc_dma_control(struct dma_chan *chan, enum dma_ctrl_cmd cmd,
unsigned long arg)
{
struct dma_slave_config *config;
struct sirfsoc_dma_chan *schan = dma_chan_to_sirfsoc_dma_chan(chan);
switch (cmd) {
case DMA_TERMINATE_ALL:
return sirfsoc_dma_terminate_all(schan);
case DMA_SLAVE_CONFIG:
config = (struct dma_slave_config *)arg;
return sirfsoc_dma_slave_config(schan, config);
default:
break;
}
return -ENOSYS;
}
/* Alloc channel resources */
static int sirfsoc_dma_alloc_chan_resources(struct dma_chan *chan)
{
struct sirfsoc_dma *sdma = dma_chan_to_sirfsoc_dma(chan);
struct sirfsoc_dma_chan *schan = dma_chan_to_sirfsoc_dma_chan(chan);
struct sirfsoc_dma_desc *sdesc;
unsigned long flags;
LIST_HEAD(descs);
int i;
/* Alloc descriptors for this channel */
for (i = 0; i < SIRFSOC_DMA_DESCRIPTORS; i++) {
sdesc = kzalloc(sizeof(*sdesc), GFP_KERNEL);
if (!sdesc) {
dev_notice(sdma->dma.dev, "Memory allocation error. "
"Allocated only %u descriptors\n", i);
break;
}
dma_async_tx_descriptor_init(&sdesc->desc, chan);
sdesc->desc.flags = DMA_CTRL_ACK;
sdesc->desc.tx_submit = sirfsoc_dma_tx_submit;
list_add_tail(&sdesc->node, &descs);
}
/* Return error only if no descriptors were allocated */
if (i == 0)
return -ENOMEM;
spin_lock_irqsave(&schan->lock, flags);
list_splice_tail_init(&descs, &schan->free);
spin_unlock_irqrestore(&schan->lock, flags);
return i;
}
/* Free channel resources */
static void sirfsoc_dma_free_chan_resources(struct dma_chan *chan)
{
struct sirfsoc_dma_chan *schan = dma_chan_to_sirfsoc_dma_chan(chan);
struct sirfsoc_dma_desc *sdesc, *tmp;
unsigned long flags;
LIST_HEAD(descs);
spin_lock_irqsave(&schan->lock, flags);
/* Channel must be idle */
BUG_ON(!list_empty(&schan->prepared));
BUG_ON(!list_empty(&schan->queued));
BUG_ON(!list_empty(&schan->active));
BUG_ON(!list_empty(&schan->completed));
/* Move data */
list_splice_tail_init(&schan->free, &descs);
spin_unlock_irqrestore(&schan->lock, flags);
/* Free descriptors */
list_for_each_entry_safe(sdesc, tmp, &descs, node)
kfree(sdesc);
}
/* Send pending descriptor to hardware */
static void sirfsoc_dma_issue_pending(struct dma_chan *chan)
{
struct sirfsoc_dma_chan *schan = dma_chan_to_sirfsoc_dma_chan(chan);
unsigned long flags;
spin_lock_irqsave(&schan->lock, flags);
if (list_empty(&schan->active) && !list_empty(&schan->queued))
sirfsoc_dma_execute(schan);
spin_unlock_irqrestore(&schan->lock, flags);
}
/* Check request completion status */
static enum dma_status
sirfsoc_dma_tx_status(struct dma_chan *chan, dma_cookie_t cookie,
struct dma_tx_state *txstate)
{
struct sirfsoc_dma_chan *schan = dma_chan_to_sirfsoc_dma_chan(chan);
unsigned long flags;
dma_cookie_t last_used;
dma_cookie_t last_complete;
spin_lock_irqsave(&schan->lock, flags);
last_used = schan->chan.cookie;
last_complete = schan->completed_cookie;
spin_unlock_irqrestore(&schan->lock, flags);
dma_set_tx_state(txstate, last_complete, last_used, 0);
return dma_async_is_complete(cookie, last_complete, last_used);
}
static struct dma_async_tx_descriptor *sirfsoc_dma_prep_interleaved(
struct dma_chan *chan, struct dma_interleaved_template *xt,
unsigned long flags)
{
struct sirfsoc_dma *sdma = dma_chan_to_sirfsoc_dma(chan);
struct sirfsoc_dma_chan *schan = dma_chan_to_sirfsoc_dma_chan(chan);
struct sirfsoc_dma_desc *sdesc = NULL;
unsigned long iflags;
int ret;
if ((xt->dir != DMA_MEM_TO_DEV) || (xt->dir != DMA_DEV_TO_MEM)) {
ret = -EINVAL;
goto err_dir;
}
/* Get free descriptor */
spin_lock_irqsave(&schan->lock, iflags);
if (!list_empty(&schan->free)) {
sdesc = list_first_entry(&schan->free, struct sirfsoc_dma_desc,
node);
list_del(&sdesc->node);
}
spin_unlock_irqrestore(&schan->lock, iflags);
if (!sdesc) {
/* try to free completed descriptors */
sirfsoc_dma_process_completed(sdma);
ret = 0;
goto no_desc;
}
/* Place descriptor in prepared list */
spin_lock_irqsave(&schan->lock, iflags);
/*
* Number of chunks in a frame can only be 1 for prima2
* and ylen (number of frame - 1) must be at least 0
*/
if ((xt->frame_size == 1) && (xt->numf > 0)) {
sdesc->cyclic = 0;
sdesc->xlen = xt->sgl[0].size / SIRFSOC_DMA_WORD_LEN;
sdesc->width = (xt->sgl[0].size + xt->sgl[0].icg) /
SIRFSOC_DMA_WORD_LEN;
sdesc->ylen = xt->numf - 1;
if (xt->dir == DMA_MEM_TO_DEV) {
sdesc->addr = xt->src_start;
sdesc->dir = 1;
} else {
sdesc->addr = xt->dst_start;
sdesc->dir = 0;
}
list_add_tail(&sdesc->node, &schan->prepared);
} else {
pr_err("sirfsoc DMA Invalid xfer\n");
ret = -EINVAL;
goto err_xfer;
}
spin_unlock_irqrestore(&schan->lock, iflags);
return &sdesc->desc;
err_xfer:
spin_unlock_irqrestore(&schan->lock, iflags);
no_desc:
err_dir:
return ERR_PTR(ret);
}
static struct dma_async_tx_descriptor *
sirfsoc_dma_prep_cyclic(struct dma_chan *chan, dma_addr_t addr,
size_t buf_len, size_t period_len,
enum dma_transfer_direction direction)
{
struct sirfsoc_dma_chan *schan = dma_chan_to_sirfsoc_dma_chan(chan);
struct sirfsoc_dma_desc *sdesc = NULL;
unsigned long iflags;
/*
* we only support cycle transfer with 2 period
* If the X-length is set to 0, it would be the loop mode.
* The DMA address keeps increasing until reaching the end of a loop
* area whose size is defined by (DMA_WIDTH x (Y_LENGTH + 1)). Then
* the DMA address goes back to the beginning of this area.
* In loop mode, the DMA data region is divided into two parts, BUFA
* and BUFB. DMA controller generates interrupts twice in each loop:
* when the DMA address reaches the end of BUFA or the end of the
* BUFB
*/
if (buf_len != 2 * period_len)
return ERR_PTR(-EINVAL);
/* Get free descriptor */
spin_lock_irqsave(&schan->lock, iflags);
if (!list_empty(&schan->free)) {
sdesc = list_first_entry(&schan->free, struct sirfsoc_dma_desc,
node);
list_del(&sdesc->node);
}
spin_unlock_irqrestore(&schan->lock, iflags);
if (!sdesc)
return 0;
/* Place descriptor in prepared list */
spin_lock_irqsave(&schan->lock, iflags);
sdesc->addr = addr;
sdesc->cyclic = 1;
sdesc->xlen = 0;
sdesc->ylen = buf_len / SIRFSOC_DMA_WORD_LEN - 1;
sdesc->width = 1;
list_add_tail(&sdesc->node, &schan->prepared);
spin_unlock_irqrestore(&schan->lock, iflags);
return &sdesc->desc;
}
/*
* The DMA controller consists of 16 independent DMA channels.
* Each channel is allocated to a different function
*/
bool sirfsoc_dma_filter_id(struct dma_chan *chan, void *chan_id)
{
unsigned int ch_nr = (unsigned int) chan_id;
if (ch_nr == chan->chan_id +
chan->device->dev_id * SIRFSOC_DMA_CHANNELS)
return true;
return false;
}
EXPORT_SYMBOL(sirfsoc_dma_filter_id);
static int __devinit sirfsoc_dma_probe(struct platform_device *op)
{
struct device_node *dn = op->dev.of_node;
struct device *dev = &op->dev;
struct dma_device *dma;
struct sirfsoc_dma *sdma;
struct sirfsoc_dma_chan *schan;
struct resource res;
ulong regs_start, regs_size;
u32 id;
int ret, i;
sdma = devm_kzalloc(dev, sizeof(*sdma), GFP_KERNEL);
if (!sdma) {
dev_err(dev, "Memory exhausted!\n");
return -ENOMEM;
}
if (of_property_read_u32(dn, "cell-index", &id)) {
dev_err(dev, "Fail to get DMAC index\n");
ret = -ENODEV;
goto free_mem;
}
sdma->irq = irq_of_parse_and_map(dn, 0);
if (sdma->irq == NO_IRQ) {
dev_err(dev, "Error mapping IRQ!\n");
ret = -EINVAL;
goto free_mem;
}
ret = of_address_to_resource(dn, 0, &res);
if (ret) {
dev_err(dev, "Error parsing memory region!\n");
goto free_mem;
}
regs_start = res.start;
regs_size = resource_size(&res);
sdma->base = devm_ioremap(dev, regs_start, regs_size);
if (!sdma->base) {
dev_err(dev, "Error mapping memory region!\n");
ret = -ENOMEM;
goto irq_dispose;
}
ret = devm_request_irq(dev, sdma->irq, &sirfsoc_dma_irq, 0, DRV_NAME,
sdma);
if (ret) {
dev_err(dev, "Error requesting IRQ!\n");
ret = -EINVAL;
goto unmap_mem;
}
dma = &sdma->dma;
dma->dev = dev;
dma->chancnt = SIRFSOC_DMA_CHANNELS;
dma->device_alloc_chan_resources = sirfsoc_dma_alloc_chan_resources;
dma->device_free_chan_resources = sirfsoc_dma_free_chan_resources;
dma->device_issue_pending = sirfsoc_dma_issue_pending;
dma->device_control = sirfsoc_dma_control;
dma->device_tx_status = sirfsoc_dma_tx_status;
dma->device_prep_interleaved_dma = sirfsoc_dma_prep_interleaved;
dma->device_prep_dma_cyclic = sirfsoc_dma_prep_cyclic;
INIT_LIST_HEAD(&dma->channels);
dma_cap_set(DMA_SLAVE, dma->cap_mask);
dma_cap_set(DMA_CYCLIC, dma->cap_mask);
dma_cap_set(DMA_INTERLEAVE, dma->cap_mask);
dma_cap_set(DMA_PRIVATE, dma->cap_mask);
for (i = 0; i < dma->chancnt; i++) {
schan = &sdma->channels[i];
schan->chan.device = dma;
schan->chan.cookie = 1;
schan->completed_cookie = schan->chan.cookie;
INIT_LIST_HEAD(&schan->free);
INIT_LIST_HEAD(&schan->prepared);
INIT_LIST_HEAD(&schan->queued);
INIT_LIST_HEAD(&schan->active);
INIT_LIST_HEAD(&schan->completed);
spin_lock_init(&schan->lock);
list_add_tail(&schan->chan.device_node, &dma->channels);
}
tasklet_init(&sdma->tasklet, sirfsoc_dma_tasklet, (unsigned long)sdma);
/* Register DMA engine */
dev_set_drvdata(dev, sdma);
ret = dma_async_device_register(dma);
if (ret)
goto free_irq;
dev_info(dev, "initialized SIRFSOC DMAC driver\n");
return 0;
free_irq:
devm_free_irq(dev, sdma->irq, sdma);
irq_dispose:
irq_dispose_mapping(sdma->irq);
unmap_mem:
iounmap(sdma->base);
free_mem:
devm_kfree(dev, sdma);
return ret;
}
static int __devexit sirfsoc_dma_remove(struct platform_device *op)
{
struct device *dev = &op->dev;
struct sirfsoc_dma *sdma = dev_get_drvdata(dev);
dma_async_device_unregister(&sdma->dma);
devm_free_irq(dev, sdma->irq, sdma);
irq_dispose_mapping(sdma->irq);
iounmap(sdma->base);
devm_kfree(dev, sdma);
return 0;
}
static struct of_device_id sirfsoc_dma_match[] = {
{ .compatible = "sirf,prima2-dmac", },
{},
};
static struct platform_driver sirfsoc_dma_driver = {
.probe = sirfsoc_dma_probe,
.remove = __devexit_p(sirfsoc_dma_remove),
.driver = {
.name = DRV_NAME,
.owner = THIS_MODULE,
.of_match_table = sirfsoc_dma_match,
},
};
module_platform_driver(sirfsoc_dma_driver);
MODULE_AUTHOR("Rongjun Ying <rongjun.ying@csr.com>, "
"Barry Song <baohua.song@csr.com>");
MODULE_DESCRIPTION("SIRFSOC DMA control driver");
MODULE_LICENSE("GPL v2");

441
drivers/dma/ste_dma40.c
View File

@ -14,6 +14,8 @@
#include <linux/platform_device.h>
#include <linux/clk.h>
#include <linux/delay.h>
#include <linux/pm.h>
#include <linux/pm_runtime.h>
#include <linux/err.h>
#include <linux/amba/bus.h>
@ -32,6 +34,9 @@
/* Maximum iterations taken before giving up suspending a channel */
#define D40_SUSPEND_MAX_IT 500
/* Milliseconds */
#define DMA40_AUTOSUSPEND_DELAY 100
/* Hardware requirement on LCLA alignment */
#define LCLA_ALIGNMENT 0x40000
@ -62,6 +67,55 @@ enum d40_command {
D40_DMA_SUSPENDED = 3
};
/*
* These are the registers that has to be saved and later restored
* when the DMA hw is powered off.
* TODO: Add save/restore of D40_DREG_GCC on dma40 v3 or later, if that works.
*/
static u32 d40_backup_regs[] = {
D40_DREG_LCPA,
D40_DREG_LCLA,
D40_DREG_PRMSE,
D40_DREG_PRMSO,
D40_DREG_PRMOE,
D40_DREG_PRMOO,
};
#define BACKUP_REGS_SZ ARRAY_SIZE(d40_backup_regs)
/* TODO: Check if all these registers have to be saved/restored on dma40 v3 */
static u32 d40_backup_regs_v3[] = {
D40_DREG_PSEG1,
D40_DREG_PSEG2,
D40_DREG_PSEG3,
D40_DREG_PSEG4,
D40_DREG_PCEG1,
D40_DREG_PCEG2,
D40_DREG_PCEG3,
D40_DREG_PCEG4,
D40_DREG_RSEG1,
D40_DREG_RSEG2,
D40_DREG_RSEG3,
D40_DREG_RSEG4,
D40_DREG_RCEG1,
D40_DREG_RCEG2,
D40_DREG_RCEG3,
D40_DREG_RCEG4,
};
#define BACKUP_REGS_SZ_V3 ARRAY_SIZE(d40_backup_regs_v3)
static u32 d40_backup_regs_chan[] = {
D40_CHAN_REG_SSCFG,
D40_CHAN_REG_SSELT,
D40_CHAN_REG_SSPTR,
D40_CHAN_REG_SSLNK,
D40_CHAN_REG_SDCFG,
D40_CHAN_REG_SDELT,
D40_CHAN_REG_SDPTR,
D40_CHAN_REG_SDLNK,
};
/**
* struct d40_lli_pool - Structure for keeping LLIs in memory
*
@ -96,7 +150,7 @@ struct d40_lli_pool {
* during a transfer.
* @node: List entry.
* @is_in_client_list: true if the client owns this descriptor.
* the previous one.
* @cyclic: true if this is a cyclic job
*
* This descriptor is used for both logical and physical transfers.
*/
@ -143,6 +197,7 @@ struct d40_lcla_pool {
* channels.
*
* @lock: A lock protection this entity.
* @reserved: True if used by secure world or otherwise.
* @num: The physical channel number of this entity.
* @allocated_src: Bit mapped to show which src event line's are mapped to
* this physical channel. Can also be free or physically allocated.
@ -152,6 +207,7 @@ struct d40_lcla_pool {
*/
struct d40_phy_res {
spinlock_t lock;
bool reserved;
int num;
u32 allocated_src;
u32 allocated_dst;
@ -185,7 +241,6 @@ struct d40_base;
* @src_def_cfg: Default cfg register setting for src.
* @dst_def_cfg: Default cfg register setting for dst.
* @log_def: Default logical channel settings.
* @lcla: Space for one dst src pair for logical channel transfers.
* @lcpa: Pointer to dst and src lcpa settings.
* @runtime_addr: runtime configured address.
* @runtime_direction: runtime configured direction.
@ -217,7 +272,7 @@ struct d40_chan {
struct d40_log_lli_full *lcpa;
/* Runtime reconfiguration */
dma_addr_t runtime_addr;
enum dma_data_direction runtime_direction;
enum dma_transfer_direction runtime_direction;
};
/**
@ -241,6 +296,7 @@ struct d40_chan {
* @dma_both: dma_device channels that can do both memcpy and slave transfers.
* @dma_slave: dma_device channels that can do only do slave transfers.
* @dma_memcpy: dma_device channels that can do only do memcpy transfers.
* @phy_chans: Room for all possible physical channels in system.
* @log_chans: Room for all possible logical channels in system.
* @lookup_log_chans: Used to map interrupt number to logical channel. Points
* to log_chans entries.
@ -248,12 +304,20 @@ struct d40_chan {
* to phy_chans entries.
* @plat_data: Pointer to provided platform_data which is the driver
* configuration.
* @lcpa_regulator: Pointer to hold the regulator for the esram bank for lcla.
* @phy_res: Vector containing all physical channels.
* @lcla_pool: lcla pool settings and data.
* @lcpa_base: The virtual mapped address of LCPA.
* @phy_lcpa: The physical address of the LCPA.
* @lcpa_size: The size of the LCPA area.
* @desc_slab: cache for descriptors.
* @reg_val_backup: Here the values of some hardware registers are stored
* before the DMA is powered off. They are restored when the power is back on.
* @reg_val_backup_v3: Backup of registers that only exits on dma40 v3 and
* later.
* @reg_val_backup_chan: Backup data for standard channel parameter registers.
* @gcc_pwr_off_mask: Mask to maintain the channels that can be turned off.
* @initialized: true if the dma has been initialized
*/
struct d40_base {
spinlock_t interrupt_lock;
@ -275,6 +339,7 @@ struct d40_base {
struct d40_chan **lookup_log_chans;
struct d40_chan **lookup_phy_chans;
struct stedma40_platform_data *plat_data;
struct regulator *lcpa_regulator;
/* Physical half channels */
struct d40_phy_res *phy_res;
struct d40_lcla_pool lcla_pool;
@ -282,6 +347,11 @@ struct d40_base {
dma_addr_t phy_lcpa;
resource_size_t lcpa_size;
struct kmem_cache *desc_slab;
u32 reg_val_backup[BACKUP_REGS_SZ];
u32 reg_val_backup_v3[BACKUP_REGS_SZ_V3];
u32 *reg_val_backup_chan;
u16 gcc_pwr_off_mask;
bool initialized;
};
/**
@ -479,13 +549,14 @@ static struct d40_desc *d40_desc_get(struct d40_chan *d40c)
struct d40_desc *d;
struct d40_desc *_d;
list_for_each_entry_safe(d, _d, &d40c->client, node)
list_for_each_entry_safe(d, _d, &d40c->client, node) {
if (async_tx_test_ack(&d->txd)) {
d40_desc_remove(d);
desc = d;
memset(desc, 0, sizeof(*desc));
break;
}
}
}
if (!desc)
@ -536,6 +607,7 @@ static void d40_log_lli_to_lcxa(struct d40_chan *chan, struct d40_desc *desc)
bool cyclic = desc->cyclic;
int curr_lcla = -EINVAL;
int first_lcla = 0;
bool use_esram_lcla = chan->base->plat_data->use_esram_lcla;
bool linkback;
/*
@ -608,11 +680,16 @@ static void d40_log_lli_to_lcxa(struct d40_chan *chan, struct d40_desc *desc)
&lli->src[lli_current],
next_lcla, flags);
dma_sync_single_range_for_device(chan->base->dev,
pool->dma_addr, lcla_offset,
2 * sizeof(struct d40_log_lli),
DMA_TO_DEVICE);
/*
* Cache maintenance is not needed if lcla is
* mapped in esram
*/
if (!use_esram_lcla) {
dma_sync_single_range_for_device(chan->base->dev,
pool->dma_addr, lcla_offset,
2 * sizeof(struct d40_log_lli),
DMA_TO_DEVICE);
}
curr_lcla = next_lcla;
if (curr_lcla == -EINVAL || curr_lcla == first_lcla) {
@ -740,7 +817,61 @@ static int d40_sg_2_dmalen(struct scatterlist *sgl, int sg_len,
return len;
}
/* Support functions for logical channels */
#ifdef CONFIG_PM
static void dma40_backup(void __iomem *baseaddr, u32 *backup,
u32 *regaddr, int num, bool save)
{
int i;
for (i = 0; i < num; i++) {
void __iomem *addr = baseaddr + regaddr[i];
if (save)
backup[i] = readl_relaxed(addr);
else
writel_relaxed(backup[i], addr);
}
}
static void d40_save_restore_registers(struct d40_base *base, bool save)
{
int i;
/* Save/Restore channel specific registers */
for (i = 0; i < base->num_phy_chans; i++) {
void __iomem *addr;
int idx;
if (base->phy_res[i].reserved)
continue;
addr = base->virtbase + D40_DREG_PCBASE + i * D40_DREG_PCDELTA;
idx = i * ARRAY_SIZE(d40_backup_regs_chan);
dma40_backup(addr, &base->reg_val_backup_chan[idx],
d40_backup_regs_chan,
ARRAY_SIZE(d40_backup_regs_chan),
save);
}
/* Save/Restore global registers */
dma40_backup(base->virtbase, base->reg_val_backup,
d40_backup_regs, ARRAY_SIZE(d40_backup_regs),
save);
/* Save/Restore registers only existing on dma40 v3 and later */
if (base->rev >= 3)
dma40_backup(base->virtbase, base->reg_val_backup_v3,
d40_backup_regs_v3,
ARRAY_SIZE(d40_backup_regs_v3),
save);
}
#else
static void d40_save_restore_registers(struct d40_base *base, bool save)
{
}
#endif
static int d40_channel_execute_command(struct d40_chan *d40c,
enum d40_command command)
@ -973,6 +1104,10 @@ static void d40_config_write(struct d40_chan *d40c)
/* Set LIDX for lcla */
writel(lidx, chanbase + D40_CHAN_REG_SSELT);
writel(lidx, chanbase + D40_CHAN_REG_SDELT);
/* Clear LNK which will be used by d40_chan_has_events() */
writel(0, chanbase + D40_CHAN_REG_SSLNK);
writel(0, chanbase + D40_CHAN_REG_SDLNK);
}
}
@ -1013,6 +1148,7 @@ static int d40_pause(struct d40_chan *d40c)
if (!d40c->busy)
return 0;
pm_runtime_get_sync(d40c->base->dev);
spin_lock_irqsave(&d40c->lock, flags);
res = d40_channel_execute_command(d40c, D40_DMA_SUSPEND_REQ);
@ -1025,7 +1161,8 @@ static int d40_pause(struct d40_chan *d40c)
D40_DMA_RUN);
}
}
pm_runtime_mark_last_busy(d40c->base->dev);
pm_runtime_put_autosuspend(d40c->base->dev);
spin_unlock_irqrestore(&d40c->lock, flags);
return res;
}
@ -1039,7 +1176,7 @@ static int d40_resume(struct d40_chan *d40c)
return 0;
spin_lock_irqsave(&d40c->lock, flags);
pm_runtime_get_sync(d40c->base->dev);
if (d40c->base->rev == 0)
if (chan_is_logical(d40c)) {
res = d40_channel_execute_command(d40c,
@ -1057,6 +1194,8 @@ static int d40_resume(struct d40_chan *d40c)
}
no_suspend:
pm_runtime_mark_last_busy(d40c->base->dev);
pm_runtime_put_autosuspend(d40c->base->dev);
spin_unlock_irqrestore(&d40c->lock, flags);
return res;
}
@ -1129,7 +1268,10 @@ static struct d40_desc *d40_queue_start(struct d40_chan *d40c)
d40d = d40_first_queued(d40c);
if (d40d != NULL) {
d40c->busy = true;
if (!d40c->busy)
d40c->busy = true;
pm_runtime_get_sync(d40c->base->dev);
/* Remove from queue */
d40_desc_remove(d40d);
@ -1190,6 +1332,8 @@ static void dma_tc_handle(struct d40_chan *d40c)
if (d40_queue_start(d40c) == NULL)
d40c->busy = false;
pm_runtime_mark_last_busy(d40c->base->dev);
pm_runtime_put_autosuspend(d40c->base->dev);
}
d40c->pending_tx++;
@ -1405,11 +1549,16 @@ static int d40_validate_conf(struct d40_chan *d40c,
return res;
}
static bool d40_alloc_mask_set(struct d40_phy_res *phy, bool is_src,
int log_event_line, bool is_log)
static bool d40_alloc_mask_set(struct d40_phy_res *phy,
bool is_src, int log_event_line, bool is_log,
bool *first_user)
{
unsigned long flags;
spin_lock_irqsave(&phy->lock, flags);
*first_user = ((phy->allocated_src | phy->allocated_dst)
== D40_ALLOC_FREE);
if (!is_log) {
/* Physical interrupts are masked per physical full channel */
if (phy->allocated_src == D40_ALLOC_FREE &&
@ -1490,7 +1639,7 @@ out:
return is_free;
}
static int d40_allocate_channel(struct d40_chan *d40c)
static int d40_allocate_channel(struct d40_chan *d40c, bool *first_phy_user)
{
int dev_type;
int event_group;
@ -1526,7 +1675,8 @@ static int d40_allocate_channel(struct d40_chan *d40c)
for (i = 0; i < d40c->base->num_phy_chans; i++) {
if (d40_alloc_mask_set(&phys[i], is_src,
0, is_log))
0, is_log,
first_phy_user))
goto found_phy;
}
} else
@ -1536,7 +1686,8 @@ static int d40_allocate_channel(struct d40_chan *d40c)
if (d40_alloc_mask_set(&phys[i],
is_src,
0,
is_log))
is_log,
first_phy_user))
goto found_phy;
}
}
@ -1552,6 +1703,25 @@ found_phy:
/* Find logical channel */
for (j = 0; j < d40c->base->num_phy_chans; j += 8) {
int phy_num = j + event_group * 2;
if (d40c->dma_cfg.use_fixed_channel) {
i = d40c->dma_cfg.phy_channel;
if ((i != phy_num) && (i != phy_num + 1)) {
dev_err(chan2dev(d40c),
"invalid fixed phy channel %d\n", i);
return -EINVAL;
}
if (d40_alloc_mask_set(&phys[i], is_src, event_line,
is_log, first_phy_user))
goto found_log;
dev_err(chan2dev(d40c),
"could not allocate fixed phy channel %d\n", i);
return -EINVAL;
}
/*
* Spread logical channels across all available physical rather
* than pack every logical channel at the first available phy
@ -1560,13 +1730,15 @@ found_phy:
if (is_src) {
for (i = phy_num; i < phy_num + 2; i++) {
if (d40_alloc_mask_set(&phys[i], is_src,
event_line, is_log))
event_line, is_log,
first_phy_user))
goto found_log;
}
} else {
for (i = phy_num + 1; i >= phy_num; i--) {
if (d40_alloc_mask_set(&phys[i], is_src,
event_line, is_log))
event_line, is_log,
first_phy_user))
goto found_log;
}
}
@ -1643,10 +1815,11 @@ static int d40_free_dma(struct d40_chan *d40c)
return -EINVAL;
}
pm_runtime_get_sync(d40c->base->dev);
res = d40_channel_execute_command(d40c, D40_DMA_SUSPEND_REQ);
if (res) {
chan_err(d40c, "suspend failed\n");
return res;
goto out;
}
if (chan_is_logical(d40c)) {
@ -1664,13 +1837,11 @@ static int d40_free_dma(struct d40_chan *d40c)
if (d40_chan_has_events(d40c)) {
res = d40_channel_execute_command(d40c,
D40_DMA_RUN);
if (res) {
if (res)
chan_err(d40c,
"Executing RUN command\n");
return res;
}
}
return 0;
goto out;
}
} else {
(void) d40_alloc_mask_free(phy, is_src, 0);
@ -1680,13 +1851,23 @@ static int d40_free_dma(struct d40_chan *d40c)
res = d40_channel_execute_command(d40c, D40_DMA_STOP);
if (res) {
chan_err(d40c, "Failed to stop channel\n");
return res;
goto out;
}
if (d40c->busy) {
pm_runtime_mark_last_busy(d40c->base->dev);
pm_runtime_put_autosuspend(d40c->base->dev);
}
d40c->busy = false;
d40c->phy_chan = NULL;
d40c->configured = false;
d40c->base->lookup_phy_chans[phy->num] = NULL;
out:
return 0;
pm_runtime_mark_last_busy(d40c->base->dev);
pm_runtime_put_autosuspend(d40c->base->dev);
return res;
}
static bool d40_is_paused(struct d40_chan *d40c)
@ -1855,7 +2036,7 @@ err:
}
static dma_addr_t
d40_get_dev_addr(struct d40_chan *chan, enum dma_data_direction direction)
d40_get_dev_addr(struct d40_chan *chan, enum dma_transfer_direction direction)
{
struct stedma40_platform_data *plat = chan->base->plat_data;
struct stedma40_chan_cfg *cfg = &chan->dma_cfg;
@ -1864,9 +2045,9 @@ d40_get_dev_addr(struct d40_chan *chan, enum dma_data_direction direction)
if (chan->runtime_addr)
return chan->runtime_addr;
if (direction == DMA_FROM_DEVICE)
if (direction == DMA_DEV_TO_MEM)
addr = plat->dev_rx[cfg->src_dev_type];
else if (direction == DMA_TO_DEVICE)
else if (direction == DMA_MEM_TO_DEV)
addr = plat->dev_tx[cfg->dst_dev_type];
return addr;
@ -1875,7 +2056,7 @@ d40_get_dev_addr(struct d40_chan *chan, enum dma_data_direction direction)
static struct dma_async_tx_descriptor *
d40_prep_sg(struct dma_chan *dchan, struct scatterlist *sg_src,
struct scatterlist *sg_dst, unsigned int sg_len,
enum dma_data_direction direction, unsigned long dma_flags)
enum dma_transfer_direction direction, unsigned long dma_flags)
{
struct d40_chan *chan = container_of(dchan, struct d40_chan, chan);
dma_addr_t src_dev_addr = 0;
@ -1902,9 +2083,9 @@ d40_prep_sg(struct dma_chan *dchan, struct scatterlist *sg_src,
if (direction != DMA_NONE) {
dma_addr_t dev_addr = d40_get_dev_addr(chan, direction);
if (direction == DMA_FROM_DEVICE)
if (direction == DMA_DEV_TO_MEM)
src_dev_addr = dev_addr;
else if (direction == DMA_TO_DEVICE)
else if (direction == DMA_MEM_TO_DEV)
dst_dev_addr = dev_addr;
}
@ -2011,14 +2192,15 @@ static int d40_alloc_chan_resources(struct dma_chan *chan)
goto fail;
}
}
is_free_phy = (d40c->phy_chan == NULL);
err = d40_allocate_channel(d40c);
err = d40_allocate_channel(d40c, &is_free_phy);
if (err) {
chan_err(d40c, "Failed to allocate channel\n");
d40c->configured = false;
goto fail;
}
pm_runtime_get_sync(d40c->base->dev);
/* Fill in basic CFG register values */
d40_phy_cfg(&d40c->dma_cfg, &d40c->src_def_cfg,
&d40c->dst_def_cfg, chan_is_logical(d40c));
@ -2038,6 +2220,12 @@ static int d40_alloc_chan_resources(struct dma_chan *chan)
D40_LCPA_CHAN_SIZE + D40_LCPA_CHAN_DST_DELTA;
}
dev_dbg(chan2dev(d40c), "allocated %s channel (phy %d%s)\n",
chan_is_logical(d40c) ? "logical" : "physical",
d40c->phy_chan->num,
d40c->dma_cfg.use_fixed_channel ? ", fixed" : "");
/*
* Only write channel configuration to the DMA if the physical
* resource is free. In case of multiple logical channels
@ -2046,6 +2234,8 @@ static int d40_alloc_chan_resources(struct dma_chan *chan)
if (is_free_phy)
d40_config_write(d40c);
fail:
pm_runtime_mark_last_busy(d40c->base->dev);
pm_runtime_put_autosuspend(d40c->base->dev);
spin_unlock_irqrestore(&d40c->lock, flags);
return err;
}
@ -2108,10 +2298,10 @@ d40_prep_memcpy_sg(struct dma_chan *chan,
static struct dma_async_tx_descriptor *d40_prep_slave_sg(struct dma_chan *chan,
struct scatterlist *sgl,
unsigned int sg_len,
enum dma_data_direction direction,
enum dma_transfer_direction direction,
unsigned long dma_flags)
{
if (direction != DMA_FROM_DEVICE && direction != DMA_TO_DEVICE)
if (direction != DMA_DEV_TO_MEM && direction != DMA_MEM_TO_DEV)
return NULL;
return d40_prep_sg(chan, sgl, sgl, sg_len, direction, dma_flags);
@ -2120,7 +2310,7 @@ static struct dma_async_tx_descriptor *d40_prep_slave_sg(struct dma_chan *chan,
static struct dma_async_tx_descriptor *
dma40_prep_dma_cyclic(struct dma_chan *chan, dma_addr_t dma_addr,
size_t buf_len, size_t period_len,
enum dma_data_direction direction)
enum dma_transfer_direction direction)
{
unsigned int periods = buf_len / period_len;
struct dma_async_tx_descriptor *txd;
@ -2269,7 +2459,7 @@ static int d40_set_runtime_config(struct dma_chan *chan,
dst_addr_width = config->dst_addr_width;
dst_maxburst = config->dst_maxburst;
if (config->direction == DMA_FROM_DEVICE) {
if (config->direction == DMA_DEV_TO_MEM) {
dma_addr_t dev_addr_rx =
d40c->base->plat_data->dev_rx[cfg->src_dev_type];
@ -2292,7 +2482,7 @@ static int d40_set_runtime_config(struct dma_chan *chan,
if (dst_maxburst == 0)
dst_maxburst = src_maxburst;
} else if (config->direction == DMA_TO_DEVICE) {
} else if (config->direction == DMA_MEM_TO_DEV) {
dma_addr_t dev_addr_tx =
d40c->base->plat_data->dev_tx[cfg->dst_dev_type];
@ -2357,7 +2547,7 @@ static int d40_set_runtime_config(struct dma_chan *chan,
"configured channel %s for %s, data width %d/%d, "
"maxburst %d/%d elements, LE, no flow control\n",
dma_chan_name(chan),
(config->direction == DMA_FROM_DEVICE) ? "RX" : "TX",
(config->direction == DMA_DEV_TO_MEM) ? "RX" : "TX",
src_addr_width, dst_addr_width,
src_maxburst, dst_maxburst);
@ -2519,6 +2709,72 @@ failure1:
return err;
}
/* Suspend resume functionality */
#ifdef CONFIG_PM
static int dma40_pm_suspend(struct device *dev)
{
struct platform_device *pdev = to_platform_device(dev);
struct d40_base *base = platform_get_drvdata(pdev);
int ret = 0;
if (!pm_runtime_suspended(dev))
return -EBUSY;
if (base->lcpa_regulator)
ret = regulator_disable(base->lcpa_regulator);
return ret;
}
static int dma40_runtime_suspend(struct device *dev)
{
struct platform_device *pdev = to_platform_device(dev);
struct d40_base *base = platform_get_drvdata(pdev);
d40_save_restore_registers(base, true);
/* Don't disable/enable clocks for v1 due to HW bugs */
if (base->rev != 1)
writel_relaxed(base->gcc_pwr_off_mask,
base->virtbase + D40_DREG_GCC);
return 0;
}
static int dma40_runtime_resume(struct device *dev)
{
struct platform_device *pdev = to_platform_device(dev);
struct d40_base *base = platform_get_drvdata(pdev);
if (base->initialized)
d40_save_restore_registers(base, false);
writel_relaxed(D40_DREG_GCC_ENABLE_ALL,
base->virtbase + D40_DREG_GCC);
return 0;
}
static int dma40_resume(struct device *dev)
{
struct platform_device *pdev = to_platform_device(dev);
struct d40_base *base = platform_get_drvdata(pdev);
int ret = 0;
if (base->lcpa_regulator)
ret = regulator_enable(base->lcpa_regulator);
return ret;
}
static const struct dev_pm_ops dma40_pm_ops = {
.suspend = dma40_pm_suspend,
.runtime_suspend = dma40_runtime_suspend,
.runtime_resume = dma40_runtime_resume,
.resume = dma40_resume,
};
#define DMA40_PM_OPS (&dma40_pm_ops)
#else
#define DMA40_PM_OPS NULL
#endif
/* Initialization functions. */
static int __init d40_phy_res_init(struct d40_base *base)
@ -2527,6 +2783,7 @@ static int __init d40_phy_res_init(struct d40_base *base)
int num_phy_chans_avail = 0;
u32 val[2];
int odd_even_bit = -2;
int gcc = D40_DREG_GCC_ENA;
val[0] = readl(base->virtbase + D40_DREG_PRSME);
val[1] = readl(base->virtbase + D40_DREG_PRSMO);
@ -2538,9 +2795,17 @@ static int __init d40_phy_res_init(struct d40_base *base)
/* Mark security only channels as occupied */
base->phy_res[i].allocated_src = D40_ALLOC_PHY;
base->phy_res[i].allocated_dst = D40_ALLOC_PHY;
base->phy_res[i].reserved = true;
gcc |= D40_DREG_GCC_EVTGRP_ENA(D40_PHYS_TO_GROUP(i),
D40_DREG_GCC_SRC);
gcc |= D40_DREG_GCC_EVTGRP_ENA(D40_PHYS_TO_GROUP(i),
D40_DREG_GCC_DST);
} else {
base->phy_res[i].allocated_src = D40_ALLOC_FREE;
base->phy_res[i].allocated_dst = D40_ALLOC_FREE;
base->phy_res[i].reserved = false;
num_phy_chans_avail++;
}
spin_lock_init(&base->phy_res[i].lock);
@ -2552,6 +2817,11 @@ static int __init d40_phy_res_init(struct d40_base *base)
base->phy_res[chan].allocated_src = D40_ALLOC_PHY;
base->phy_res[chan].allocated_dst = D40_ALLOC_PHY;
base->phy_res[chan].reserved = true;
gcc |= D40_DREG_GCC_EVTGRP_ENA(D40_PHYS_TO_GROUP(chan),
D40_DREG_GCC_SRC);
gcc |= D40_DREG_GCC_EVTGRP_ENA(D40_PHYS_TO_GROUP(chan),
D40_DREG_GCC_DST);
num_phy_chans_avail--;
}
@ -2572,6 +2842,15 @@ static int __init d40_phy_res_init(struct d40_base *base)
val[0] = val[0] >> 2;
}
/*
* To keep things simple, Enable all clocks initially.
* The clocks will get managed later post channel allocation.
* The clocks for the event lines on which reserved channels exists
* are not managed here.
*/
writel(D40_DREG_GCC_ENABLE_ALL, base->virtbase + D40_DREG_GCC);
base->gcc_pwr_off_mask = gcc;
return num_phy_chans_avail;
}
@ -2699,10 +2978,15 @@ static struct d40_base * __init d40_hw_detect_init(struct platform_device *pdev)
goto failure;
}
base->lcla_pool.alloc_map = kzalloc(num_phy_chans *
sizeof(struct d40_desc *) *
D40_LCLA_LINK_PER_EVENT_GRP,
base->reg_val_backup_chan = kmalloc(base->num_phy_chans *
sizeof(d40_backup_regs_chan),
GFP_KERNEL);
if (!base->reg_val_backup_chan)
goto failure;
base->lcla_pool.alloc_map =
kzalloc(num_phy_chans * sizeof(struct d40_desc *)
* D40_LCLA_LINK_PER_EVENT_GRP, GFP_KERNEL);
if (!base->lcla_pool.alloc_map)
goto failure;
@ -2741,9 +3025,9 @@ failure:
static void __init d40_hw_init(struct d40_base *base)
{
static const struct d40_reg_val dma_init_reg[] = {
static struct d40_reg_val dma_init_reg[] = {
/* Clock every part of the DMA block from start */
{ .reg = D40_DREG_GCC, .val = 0x0000ff01},
{ .reg = D40_DREG_GCC, .val = D40_DREG_GCC_ENABLE_ALL},
/* Interrupts on all logical channels */
{ .reg = D40_DREG_LCMIS0, .val = 0xFFFFFFFF},
@ -2943,11 +3227,31 @@ static int __init d40_probe(struct platform_device *pdev)
d40_err(&pdev->dev, "Failed to ioremap LCPA region\n");
goto failure;
}
/* If lcla has to be located in ESRAM we don't need to allocate */
if (base->plat_data->use_esram_lcla) {
res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
"lcla_esram");
if (!res) {
ret = -ENOENT;
d40_err(&pdev->dev,
"No \"lcla_esram\" memory resource\n");
goto failure;
}
base->lcla_pool.base = ioremap(res->start,
resource_size(res));
if (!base->lcla_pool.base) {
ret = -ENOMEM;
d40_err(&pdev->dev, "Failed to ioremap LCLA region\n");
goto failure;
}
writel(res->start, base->virtbase + D40_DREG_LCLA);
ret = d40_lcla_allocate(base);
if (ret) {
d40_err(&pdev->dev, "Failed to allocate LCLA area\n");
goto failure;
} else {
ret = d40_lcla_allocate(base);
if (ret) {
d40_err(&pdev->dev, "Failed to allocate LCLA area\n");
goto failure;
}
}
spin_lock_init(&base->lcla_pool.lock);
@ -2960,6 +3264,32 @@ static int __init d40_probe(struct platform_device *pdev)
goto failure;
}
pm_runtime_irq_safe(base->dev);
pm_runtime_set_autosuspend_delay(base->dev, DMA40_AUTOSUSPEND_DELAY);
pm_runtime_use_autosuspend(base->dev);
pm_runtime_enable(base->dev);
pm_runtime_resume(base->dev);
if (base->plat_data->use_esram_lcla) {
base->lcpa_regulator = regulator_get(base->dev, "lcla_esram");
if (IS_ERR(base->lcpa_regulator)) {
d40_err(&pdev->dev, "Failed to get lcpa_regulator\n");
base->lcpa_regulator = NULL;
goto failure;
}
ret = regulator_enable(base->lcpa_regulator);
if (ret) {
d40_err(&pdev->dev,
"Failed to enable lcpa_regulator\n");
regulator_put(base->lcpa_regulator);
base->lcpa_regulator = NULL;
goto failure;
}
}
base->initialized = true;
err = d40_dmaengine_init(base, num_reserved_chans);
if (err)
goto failure;
@ -2976,6 +3306,11 @@ failure:
if (base->virtbase)
iounmap(base->virtbase);
if (base->lcla_pool.base && base->plat_data->use_esram_lcla) {
iounmap(base->lcla_pool.base);
base->lcla_pool.base = NULL;
}
if (base->lcla_pool.dma_addr)
dma_unmap_single(base->dev, base->lcla_pool.dma_addr,
SZ_1K * base->num_phy_chans,
@ -2998,6 +3333,11 @@ failure:
clk_put(base->clk);
}
if (base->lcpa_regulator) {
regulator_disable(base->lcpa_regulator);
regulator_put(base->lcpa_regulator);
}
kfree(base->lcla_pool.alloc_map);
kfree(base->lookup_log_chans);
kfree(base->lookup_phy_chans);
@ -3013,6 +3353,7 @@ static struct platform_driver d40_driver = {
.driver = {
.owner = THIS_MODULE,
.name = D40_NAME,
.pm = DMA40_PM_OPS,
},
};

11
drivers/dma/ste_dma40_ll.h
View File

@ -16,6 +16,8 @@
#define D40_TYPE_TO_GROUP(type) (type / 16)
#define D40_TYPE_TO_EVENT(type) (type % 16)
#define D40_GROUP_SIZE 8
#define D40_PHYS_TO_GROUP(phys) ((phys & (D40_GROUP_SIZE - 1)) / 2)
/* Most bits of the CFG register are the same in log as in phy mode */
#define D40_SREG_CFG_MST_POS 15
@ -123,6 +125,15 @@
/* DMA Register Offsets */
#define D40_DREG_GCC 0x000
#define D40_DREG_GCC_ENA 0x1
/* This assumes that there are only 4 event groups */
#define D40_DREG_GCC_ENABLE_ALL 0xff01
#define D40_DREG_GCC_EVTGRP_POS 8
#define D40_DREG_GCC_SRC 0
#define D40_DREG_GCC_DST 1
#define D40_DREG_GCC_EVTGRP_ENA(x, y) \
(1 << (D40_DREG_GCC_EVTGRP_POS + 2 * x + y))
#define D40_DREG_PRTYP 0x004
#define D40_DREG_PRSME 0x008
#define D40_DREG_PRSMO 0x00C

30
drivers/dma/timb_dma.c
View File

@ -90,7 +90,7 @@ struct timb_dma_chan {
struct list_head queue;
struct list_head free_list;
unsigned int bytes_per_line;
enum dma_data_direction direction;
enum dma_transfer_direction direction;
unsigned int descs; /* Descriptors to allocate */
unsigned int desc_elems; /* number of elems per descriptor */
};
@ -166,10 +166,10 @@ static void __td_unmap_desc(struct timb_dma_chan *td_chan, const u8 *dma_desc,
if (single)
dma_unmap_single(chan2dev(&td_chan->chan), addr, len,
td_chan->direction);
DMA_TO_DEVICE);
else
dma_unmap_page(chan2dev(&td_chan->chan), addr, len,
td_chan->direction);
DMA_TO_DEVICE);
}
static void __td_unmap_descs(struct timb_dma_desc *td_desc, bool single)
@ -235,7 +235,7 @@ static void __td_start_dma(struct timb_dma_chan *td_chan)
"td_chan: %p, chan: %d, membase: %p\n",
td_chan, td_chan->chan.chan_id, td_chan->membase);
if (td_chan->direction == DMA_FROM_DEVICE) {
if (td_chan->direction == DMA_DEV_TO_MEM) {
/* descriptor address */
iowrite32(0, td_chan->membase + TIMBDMA_OFFS_RX_DHAR);
@ -278,7 +278,7 @@ static void __td_finish(struct timb_dma_chan *td_chan)
txd->cookie);
/* make sure to stop the transfer */
if (td_chan->direction == DMA_FROM_DEVICE)
if (td_chan->direction == DMA_DEV_TO_MEM)
iowrite32(0, td_chan->membase + TIMBDMA_OFFS_RX_ER);
/* Currently no support for stopping DMA transfers
else
@ -558,7 +558,7 @@ static void td_issue_pending(struct dma_chan *chan)
static struct dma_async_tx_descriptor *td_prep_slave_sg(struct dma_chan *chan,
struct scatterlist *sgl, unsigned int sg_len,
enum dma_data_direction direction, unsigned long flags)
enum dma_transfer_direction direction, unsigned long flags)
{
struct timb_dma_chan *td_chan =
container_of(chan, struct timb_dma_chan, chan);
@ -606,7 +606,7 @@ static struct dma_async_tx_descriptor *td_prep_slave_sg(struct dma_chan *chan,
}
dma_sync_single_for_device(chan2dmadev(chan), td_desc->txd.phys,
td_desc->desc_list_len, DMA_TO_DEVICE);
td_desc->desc_list_len, DMA_MEM_TO_DEV);
return &td_desc->txd;
}
@ -775,8 +775,8 @@ static int __devinit td_probe(struct platform_device *pdev)
td_chan->descs = pchan->descriptors;
td_chan->desc_elems = pchan->descriptor_elements;
td_chan->bytes_per_line = pchan->bytes_per_line;
td_chan->direction = pchan->rx ? DMA_FROM_DEVICE :
DMA_TO_DEVICE;
td_chan->direction = pchan->rx ? DMA_DEV_TO_MEM :
DMA_MEM_TO_DEV;
td_chan->membase = td->membase +
(i / 2) * TIMBDMA_INSTANCE_OFFSET +
@ -841,17 +841,7 @@ static struct platform_driver td_driver = {
.remove = __exit_p(td_remove),
};
static int __init td_init(void)
{
return platform_driver_register(&td_driver);
}
module_init(td_init);
static void __exit td_exit(void)
{
platform_driver_unregister(&td_driver);
}
module_exit(td_exit);
module_platform_driver(td_driver);
MODULE_LICENSE("GPL v2");
MODULE_DESCRIPTION("Timberdale DMA controller driver");

12
drivers/dma/txx9dmac.c
View File

@ -845,7 +845,7 @@ txx9dmac_prep_dma_memcpy(struct dma_chan *chan, dma_addr_t dest, dma_addr_t src,
static struct dma_async_tx_descriptor *
txx9dmac_prep_slave_sg(struct dma_chan *chan, struct scatterlist *sgl,
unsigned int sg_len, enum dma_data_direction direction,
unsigned int sg_len, enum dma_transfer_direction direction,
unsigned long flags)
{
struct txx9dmac_chan *dc = to_txx9dmac_chan(chan);
@ -860,9 +860,9 @@ txx9dmac_prep_slave_sg(struct dma_chan *chan, struct scatterlist *sgl,
BUG_ON(!ds || !ds->reg_width);
if (ds->tx_reg)
BUG_ON(direction != DMA_TO_DEVICE);
BUG_ON(direction != DMA_MEM_TO_DEV);
else
BUG_ON(direction != DMA_FROM_DEVICE);
BUG_ON(direction != DMA_DEV_TO_MEM);
if (unlikely(!sg_len))
return NULL;
@ -882,7 +882,7 @@ txx9dmac_prep_slave_sg(struct dma_chan *chan, struct scatterlist *sgl,
mem = sg_dma_address(sg);
if (__is_dmac64(ddev)) {
if (direction == DMA_TO_DEVICE) {
if (direction == DMA_MEM_TO_DEV) {
desc->hwdesc.SAR = mem;
desc->hwdesc.DAR = ds->tx_reg;
} else {
@ -891,7 +891,7 @@ txx9dmac_prep_slave_sg(struct dma_chan *chan, struct scatterlist *sgl,
}
desc->hwdesc.CNTR = sg_dma_len(sg);
} else {
if (direction == DMA_TO_DEVICE) {
if (direction == DMA_MEM_TO_DEV) {
desc->hwdesc32.SAR = mem;
desc->hwdesc32.DAR = ds->tx_reg;
} else {
@ -900,7 +900,7 @@ txx9dmac_prep_slave_sg(struct dma_chan *chan, struct scatterlist *sgl,
}
desc->hwdesc32.CNTR = sg_dma_len(sg);
}
if (direction == DMA_TO_DEVICE) {
if (direction == DMA_MEM_TO_DEV) {
sai = ds->reg_width;
dai = 0;
} else {

2
drivers/media/video/mx3_camera.c
View File

@ -287,7 +287,7 @@ static void mx3_videobuf_queue(struct vb2_buffer *vb)
sg_dma_len(sg) = new_size;
txd = ichan->dma_chan.device->device_prep_slave_sg(
&ichan->dma_chan, sg, 1, DMA_FROM_DEVICE,
&ichan->dma_chan, sg, 1, DMA_DEV_TO_MEM,
DMA_PREP_INTERRUPT);
if (!txd)
goto error;

2
drivers/media/video/timblogiw.c
View File

@ -565,7 +565,7 @@ static void buffer_queue(struct videobuf_queue *vq, struct videobuf_buffer *vb)
spin_unlock_irq(&fh->queue_lock);
desc = fh->chan->device->device_prep_slave_sg(fh->chan,
buf->sg, sg_elems, DMA_FROM_DEVICE,
buf->sg, sg_elems, DMA_DEV_TO_MEM,
DMA_PREP_INTERRUPT | DMA_COMPL_SKIP_SRC_UNMAP);
if (!desc) {
spin_lock_irq(&fh->queue_lock);

2
drivers/misc/carma/carma-fpga-program.c
View File

@ -513,7 +513,7 @@ static noinline int fpga_program_dma(struct fpga_dev *priv)
* transaction, and then put it under external control
*/
memset(&config, 0, sizeof(config));
config.direction = DMA_TO_DEVICE;
config.direction = DMA_MEM_TO_DEV;
config.dst_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
config.dst_maxburst = fpga_fifo_size(priv->regs) / 2 / 4;
ret = chan->device->device_control(chan, DMA_SLAVE_CONFIG,

10
drivers/mmc/host/atmel-mci.c
View File

@ -823,6 +823,7 @@ atmci_prepare_data_dma(struct atmel_mci *host, struct mmc_data *data)
struct scatterlist *sg;
unsigned int i;
enum dma_data_direction direction;
enum dma_transfer_direction slave_dirn;
unsigned int sglen;
u32 iflags;
@ -860,16 +861,19 @@ atmci_prepare_data_dma(struct atmel_mci *host, struct mmc_data *data)
if (host->caps.has_dma)
atmci_writel(host, ATMCI_DMA, ATMCI_DMA_CHKSIZE(3) | ATMCI_DMAEN);
if (data->flags & MMC_DATA_READ)
if (data->flags & MMC_DATA_READ) {
direction = DMA_FROM_DEVICE;
else
slave_dirn = DMA_DEV_TO_MEM;
} else {
direction = DMA_TO_DEVICE;
slave_dirn = DMA_MEM_TO_DEV;
}
sglen = dma_map_sg(chan->device->dev, data->sg,
data->sg_len, direction);
desc = chan->device->device_prep_slave_sg(chan,
data->sg, sglen, direction,
data->sg, sglen, slave_dirn,
DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
if (!desc)
goto unmap_exit;

11
drivers/mmc/host/mmci.c
View File

@ -374,6 +374,7 @@ static int mmci_dma_prep_data(struct mmci_host *host, struct mmc_data *data,
struct dma_chan *chan;
struct dma_device *device;
struct dma_async_tx_descriptor *desc;
enum dma_data_direction buffer_dirn;
int nr_sg;
/* Check if next job is already prepared */
@ -387,10 +388,12 @@ static int mmci_dma_prep_data(struct mmci_host *host, struct mmc_data *data,
}
if (data->flags & MMC_DATA_READ) {
conf.direction = DMA_FROM_DEVICE;
conf.direction = DMA_DEV_TO_MEM;
buffer_dirn = DMA_FROM_DEVICE;
chan = host->dma_rx_channel;
} else {
conf.direction = DMA_TO_DEVICE;
conf.direction = DMA_MEM_TO_DEV;
buffer_dirn = DMA_TO_DEVICE;
chan = host->dma_tx_channel;
}
@ -403,7 +406,7 @@ static int mmci_dma_prep_data(struct mmci_host *host, struct mmc_data *data,
return -EINVAL;
device = chan->device;
nr_sg = dma_map_sg(device->dev, data->sg, data->sg_len, conf.direction);
nr_sg = dma_map_sg(device->dev, data->sg, data->sg_len, buffer_dirn);
if (nr_sg == 0)
return -EINVAL;
@ -426,7 +429,7 @@ static int mmci_dma_prep_data(struct mmci_host *host, struct mmc_data *data,
unmap_exit:
if (!next)
dmaengine_terminate_all(chan);
dma_unmap_sg(device->dev, data->sg, data->sg_len, conf.direction);
dma_unmap_sg(device->dev, data->sg, data->sg_len, buffer_dirn);
return -ENOMEM;
}

10
drivers/mmc/host/mxcmmc.c
View File

@ -218,6 +218,7 @@ static int mxcmci_setup_data(struct mxcmci_host *host, struct mmc_data *data)
unsigned int blksz = data->blksz;
unsigned int datasize = nob * blksz;
struct scatterlist *sg;
enum dma_transfer_direction slave_dirn;
int i, nents;
if (data->flags & MMC_DATA_STREAM)
@ -240,10 +241,13 @@ static int mxcmci_setup_data(struct mxcmci_host *host, struct mmc_data *data)
}
}
if (data->flags & MMC_DATA_READ)
if (data->flags & MMC_DATA_READ) {
host->dma_dir = DMA_FROM_DEVICE;
else
slave_dirn = DMA_DEV_TO_MEM;
} else {
host->dma_dir = DMA_TO_DEVICE;
slave_dirn = DMA_MEM_TO_DEV;
}
nents = dma_map_sg(host->dma->device->dev, data->sg,
data->sg_len, host->dma_dir);
@ -251,7 +255,7 @@ static int mxcmci_setup_data(struct mxcmci_host *host, struct mmc_data *data)
return -EINVAL;
host->desc = host->dma->device->device_prep_slave_sg(host->dma,
data->sg, data->sg_len, host->dma_dir,
data->sg, data->sg_len, slave_dirn,
DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
if (!host->desc) {

10
drivers/mmc/host/mxs-mmc.c
View File

@ -154,6 +154,7 @@ struct mxs_mmc_host {
struct dma_chan *dmach;
struct mxs_dma_data dma_data;
unsigned int dma_dir;
enum dma_transfer_direction slave_dirn;
u32 ssp_pio_words[SSP_PIO_NUM];
unsigned int version;
@ -324,7 +325,7 @@ static struct dma_async_tx_descriptor *mxs_mmc_prep_dma(
}
desc = host->dmach->device->device_prep_slave_sg(host->dmach,
sgl, sg_len, host->dma_dir, append);
sgl, sg_len, host->slave_dirn, append);
if (desc) {
desc->callback = mxs_mmc_dma_irq_callback;
desc->callback_param = host;
@ -356,6 +357,7 @@ static void mxs_mmc_bc(struct mxs_mmc_host *host)
host->ssp_pio_words[1] = cmd0;
host->ssp_pio_words[2] = cmd1;
host->dma_dir = DMA_NONE;
host->slave_dirn = DMA_TRANS_NONE;
desc = mxs_mmc_prep_dma(host, 0);
if (!desc)
goto out;
@ -395,6 +397,7 @@ static void mxs_mmc_ac(struct mxs_mmc_host *host)
host->ssp_pio_words[1] = cmd0;
host->ssp_pio_words[2] = cmd1;
host->dma_dir = DMA_NONE;
host->slave_dirn = DMA_TRANS_NONE;
desc = mxs_mmc_prep_dma(host, 0);
if (!desc)
goto out;
@ -433,6 +436,7 @@ static void mxs_mmc_adtc(struct mxs_mmc_host *host)
int i;
unsigned short dma_data_dir, timeout;
enum dma_transfer_direction slave_dirn;
unsigned int data_size = 0, log2_blksz;
unsigned int blocks = data->blocks;
@ -448,9 +452,11 @@ static void mxs_mmc_adtc(struct mxs_mmc_host *host)
if (data->flags & MMC_DATA_WRITE) {
dma_data_dir = DMA_TO_DEVICE;
slave_dirn = DMA_MEM_TO_DEV;
read = 0;
} else {
dma_data_dir = DMA_FROM_DEVICE;
slave_dirn = DMA_DEV_TO_MEM;
read = BM_SSP_CTRL0_READ;
}
@ -510,6 +516,7 @@ static void mxs_mmc_adtc(struct mxs_mmc_host *host)
host->ssp_pio_words[1] = cmd0;
host->ssp_pio_words[2] = cmd1;
host->dma_dir = DMA_NONE;
host->slave_dirn = DMA_TRANS_NONE;
desc = mxs_mmc_prep_dma(host, 0);
if (!desc)
goto out;
@ -518,6 +525,7 @@ static void mxs_mmc_adtc(struct mxs_mmc_host *host)
WARN_ON(host->data != NULL);
host->data = data;
host->dma_dir = dma_data_dir;
host->slave_dirn = slave_dirn;
desc = mxs_mmc_prep_dma(host, 1);
if (!desc)
goto out;

4
drivers/mmc/host/sh_mmcif.c
View File

@ -286,7 +286,7 @@ static void sh_mmcif_start_dma_rx(struct sh_mmcif_host *host)
if (ret > 0) {
host->dma_active = true;
desc = chan->device->device_prep_slave_sg(chan, sg, ret,
DMA_FROM_DEVICE, DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
DMA_DEV_TO_MEM, DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
}
if (desc) {
@ -335,7 +335,7 @@ static void sh_mmcif_start_dma_tx(struct sh_mmcif_host *host)
if (ret > 0) {
host->dma_active = true;
desc = chan->device->device_prep_slave_sg(chan, sg, ret,
DMA_TO_DEVICE, DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
DMA_MEM_TO_DEV, DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
}
if (desc) {

4
drivers/mmc/host/tmio_mmc_dma.c
View File

@ -77,7 +77,7 @@ static void tmio_mmc_start_dma_rx(struct tmio_mmc_host *host)
ret = dma_map_sg(chan->device->dev, sg, host->sg_len, DMA_FROM_DEVICE);
if (ret > 0)
desc = chan->device->device_prep_slave_sg(chan, sg, ret,
DMA_FROM_DEVICE, DMA_CTRL_ACK);
DMA_DEV_TO_MEM, DMA_CTRL_ACK);
if (desc) {
cookie = dmaengine_submit(desc);
@ -158,7 +158,7 @@ static void tmio_mmc_start_dma_tx(struct tmio_mmc_host *host)
ret = dma_map_sg(chan->device->dev, sg, host->sg_len, DMA_TO_DEVICE);
if (ret > 0)
desc = chan->device->device_prep_slave_sg(chan, sg, ret,
DMA_TO_DEVICE, DMA_CTRL_ACK);
DMA_MEM_TO_DEV, DMA_CTRL_ACK);
if (desc) {
cookie = dmaengine_submit(desc);

22
drivers/mtd/nand/gpmi-nand/gpmi-lib.c
View File

@ -827,7 +827,7 @@ int gpmi_send_command(struct gpmi_nand_data *this)
pio[1] = pio[2] = 0;
desc = channel->device->device_prep_slave_sg(channel,
(struct scatterlist *)pio,
ARRAY_SIZE(pio), DMA_NONE, 0);
ARRAY_SIZE(pio), DMA_TRANS_NONE, 0);
if (!desc) {
pr_err("step 1 error\n");
return -1;
@ -839,7 +839,7 @@ int gpmi_send_command(struct gpmi_nand_data *this)
sg_init_one(sgl, this->cmd_buffer, this->command_length);
dma_map_sg(this->dev, sgl, 1, DMA_TO_DEVICE);
desc = channel->device->device_prep_slave_sg(channel,
sgl, 1, DMA_TO_DEVICE, 1);
sgl, 1, DMA_MEM_TO_DEV, 1);
if (!desc) {
pr_err("step 2 error\n");
return -1;
@ -872,7 +872,7 @@ int gpmi_send_data(struct gpmi_nand_data *this)
pio[1] = 0;
desc = channel->device->device_prep_slave_sg(channel,
(struct scatterlist *)pio,
ARRAY_SIZE(pio), DMA_NONE, 0);
ARRAY_SIZE(pio), DMA_TRANS_NONE, 0);
if (!desc) {
pr_err("step 1 error\n");
return -1;
@ -881,7 +881,7 @@ int gpmi_send_data(struct gpmi_nand_data *this)
/* [2] send DMA request */
prepare_data_dma(this, DMA_TO_DEVICE);
desc = channel->device->device_prep_slave_sg(channel, &this->data_sgl,
1, DMA_TO_DEVICE, 1);
1, DMA_MEM_TO_DEV, 1);
if (!desc) {
pr_err("step 2 error\n");
return -1;
@ -908,7 +908,7 @@ int gpmi_read_data(struct gpmi_nand_data *this)
pio[1] = 0;
desc = channel->device->device_prep_slave_sg(channel,
(struct scatterlist *)pio,
ARRAY_SIZE(pio), DMA_NONE, 0);
ARRAY_SIZE(pio), DMA_TRANS_NONE, 0);
if (!desc) {
pr_err("step 1 error\n");
return -1;
@ -917,7 +917,7 @@ int gpmi_read_data(struct gpmi_nand_data *this)
/* [2] : send DMA request */
prepare_data_dma(this, DMA_FROM_DEVICE);
desc = channel->device->device_prep_slave_sg(channel, &this->data_sgl,
1, DMA_FROM_DEVICE, 1);
1, DMA_DEV_TO_MEM, 1);
if (!desc) {
pr_err("step 2 error\n");
return -1;
@ -964,7 +964,7 @@ int gpmi_send_page(struct gpmi_nand_data *this,
desc = channel->device->device_prep_slave_sg(channel,
(struct scatterlist *)pio,
ARRAY_SIZE(pio), DMA_NONE, 0);
ARRAY_SIZE(pio), DMA_TRANS_NONE, 0);
if (!desc) {
pr_err("step 2 error\n");
return -1;
@ -998,7 +998,8 @@ int gpmi_read_page(struct gpmi_nand_data *this,
| BF_GPMI_CTRL0_XFER_COUNT(0);
pio[1] = 0;
desc = channel->device->device_prep_slave_sg(channel,
(struct scatterlist *)pio, 2, DMA_NONE, 0);
(struct scatterlist *)pio, 2,
DMA_TRANS_NONE, 0);
if (!desc) {
pr_err("step 1 error\n");
return -1;
@ -1027,7 +1028,7 @@ int gpmi_read_page(struct gpmi_nand_data *this,
pio[5] = auxiliary;
desc = channel->device->device_prep_slave_sg(channel,
(struct scatterlist *)pio,
ARRAY_SIZE(pio), DMA_NONE, 1);
ARRAY_SIZE(pio), DMA_TRANS_NONE, 1);
if (!desc) {
pr_err("step 2 error\n");
return -1;
@ -1045,7 +1046,8 @@ int gpmi_read_page(struct gpmi_nand_data *this,
| BF_GPMI_CTRL0_XFER_COUNT(geo->page_size);
pio[1] = 0;
desc = channel->device->device_prep_slave_sg(channel,
(struct scatterlist *)pio, 2, DMA_NONE, 1);
(struct scatterlist *)pio, 2,
DMA_TRANS_NONE, 1);
if (!desc) {
pr_err("step 3 error\n");
return -1;

4
drivers/net/ethernet/micrel/ks8842.c
View File

@ -459,7 +459,7 @@ static int ks8842_tx_frame_dma(struct sk_buff *skb, struct net_device *netdev)
sg_dma_len(&ctl->sg) += 4 - sg_dma_len(&ctl->sg) % 4;
ctl->adesc = ctl->chan->device->device_prep_slave_sg(ctl->chan,
&ctl->sg, 1, DMA_TO_DEVICE,
&ctl->sg, 1, DMA_MEM_TO_DEV,
DMA_PREP_INTERRUPT | DMA_COMPL_SKIP_SRC_UNMAP);
if (!ctl->adesc)
return NETDEV_TX_BUSY;
@ -571,7 +571,7 @@ static int __ks8842_start_new_rx_dma(struct net_device *netdev)
sg_dma_len(sg) = DMA_BUFFER_SIZE;
ctl->adesc = ctl->chan->device->device_prep_slave_sg(ctl->chan,
sg, 1, DMA_FROM_DEVICE,
sg, 1, DMA_DEV_TO_MEM,
DMA_PREP_INTERRUPT | DMA_COMPL_SKIP_SRC_UNMAP);
if (!ctl->adesc)

8
drivers/spi/spi-dw-mid.c
View File

@ -131,7 +131,7 @@ static int mid_spi_dma_transfer(struct dw_spi *dws, int cs_change)
rxchan = dws->rxchan;
/* 2. Prepare the TX dma transfer */
txconf.direction = DMA_TO_DEVICE;
txconf.direction = DMA_MEM_TO_DEV;
txconf.dst_addr = dws->dma_addr;
txconf.dst_maxburst = LNW_DMA_MSIZE_16;
txconf.src_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
@ -147,13 +147,13 @@ static int mid_spi_dma_transfer(struct dw_spi *dws, int cs_change)
txdesc = txchan->device->device_prep_slave_sg(txchan,
&dws->tx_sgl,
1,
DMA_TO_DEVICE,
DMA_MEM_TO_DEV,
DMA_PREP_INTERRUPT | DMA_COMPL_SKIP_DEST_UNMAP);
txdesc->callback = dw_spi_dma_done;
txdesc->callback_param = dws;
/* 3. Prepare the RX dma transfer */
rxconf.direction = DMA_FROM_DEVICE;
rxconf.direction = DMA_DEV_TO_MEM;
rxconf.src_addr = dws->dma_addr;
rxconf.src_maxburst = LNW_DMA_MSIZE_16;
rxconf.dst_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
@ -169,7 +169,7 @@ static int mid_spi_dma_transfer(struct dw_spi *dws, int cs_change)
rxdesc = rxchan->device->device_prep_slave_sg(rxchan,
&dws->rx_sgl,
1,
DMA_FROM_DEVICE,
DMA_DEV_TO_MEM,
DMA_PREP_INTERRUPT | DMA_COMPL_SKIP_DEST_UNMAP);
rxdesc->callback = dw_spi_dma_done;
rxdesc->callback_param = dws;

9
drivers/spi/spi-ep93xx.c
View File

@ -551,6 +551,7 @@ ep93xx_spi_dma_prepare(struct ep93xx_spi *espi, enum dma_data_direction dir)
struct dma_async_tx_descriptor *txd;
enum dma_slave_buswidth buswidth;
struct dma_slave_config conf;
enum dma_transfer_direction slave_dirn;
struct scatterlist *sg;
struct sg_table *sgt;
struct dma_chan *chan;
@ -573,6 +574,7 @@ ep93xx_spi_dma_prepare(struct ep93xx_spi *espi, enum dma_data_direction dir)
conf.src_addr = espi->sspdr_phys;
conf.src_addr_width = buswidth;
slave_dirn = DMA_DEV_TO_MEM;
} else {
chan = espi->dma_tx;
buf = t->tx_buf;
@ -580,6 +582,7 @@ ep93xx_spi_dma_prepare(struct ep93xx_spi *espi, enum dma_data_direction dir)
conf.dst_addr = espi->sspdr_phys;
conf.dst_addr_width = buswidth;
slave_dirn = DMA_MEM_TO_DEV;
}
ret = dmaengine_slave_config(chan, &conf);
@ -631,7 +634,7 @@ ep93xx_spi_dma_prepare(struct ep93xx_spi *espi, enum dma_data_direction dir)
return ERR_PTR(-ENOMEM);
txd = chan->device->device_prep_slave_sg(chan, sgt->sgl, nents,
dir, DMA_CTRL_ACK);
slave_dirn, DMA_CTRL_ACK);
if (!txd) {
dma_unmap_sg(chan->device->dev, sgt->sgl, sgt->nents, dir);
return ERR_PTR(-ENOMEM);
@ -979,7 +982,7 @@ static int ep93xx_spi_setup_dma(struct ep93xx_spi *espi)
dma_cap_set(DMA_SLAVE, mask);
espi->dma_rx_data.port = EP93XX_DMA_SSP;
espi->dma_rx_data.direction = DMA_FROM_DEVICE;
espi->dma_rx_data.direction = DMA_DEV_TO_MEM;
espi->dma_rx_data.name = "ep93xx-spi-rx";
espi->dma_rx = dma_request_channel(mask, ep93xx_spi_dma_filter,
@ -990,7 +993,7 @@ static int ep93xx_spi_setup_dma(struct ep93xx_spi *espi)
}
espi->dma_tx_data.port = EP93XX_DMA_SSP;
espi->dma_tx_data.direction = DMA_TO_DEVICE;
espi->dma_tx_data.direction = DMA_MEM_TO_DEV;
espi->dma_tx_data.name = "ep93xx-spi-tx";
espi->dma_tx = dma_request_channel(mask, ep93xx_spi_dma_filter,

8
drivers/spi/spi-pl022.c
View File

@ -900,11 +900,11 @@ static int configure_dma(struct pl022 *pl022)
{
struct dma_slave_config rx_conf = {
.src_addr = SSP_DR(pl022->phybase),
.direction = DMA_FROM_DEVICE,
.direction = DMA_DEV_TO_MEM,
};
struct dma_slave_config tx_conf = {
.dst_addr = SSP_DR(pl022->phybase),
.direction = DMA_TO_DEVICE,
.direction = DMA_MEM_TO_DEV,
};
unsigned int pages;
int ret;
@ -1041,7 +1041,7 @@ static int configure_dma(struct pl022 *pl022)
rxdesc = rxchan->device->device_prep_slave_sg(rxchan,
pl022->sgt_rx.sgl,
rx_sglen,
DMA_FROM_DEVICE,
DMA_DEV_TO_MEM,
DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
if (!rxdesc)
goto err_rxdesc;
@ -1049,7 +1049,7 @@ static int configure_dma(struct pl022 *pl022)
txdesc = txchan->device->device_prep_slave_sg(txchan,
pl022->sgt_tx.sgl,
tx_sglen,
DMA_TO_DEVICE,
DMA_MEM_TO_DEV,
DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
if (!txdesc)
goto err_txdesc;

4
drivers/spi/spi-topcliff-pch.c
View File

@ -1079,7 +1079,7 @@ static void pch_spi_handle_dma(struct pch_spi_data *data, int *bpw)
}
sg = dma->sg_rx_p;
desc_rx = dma->chan_rx->device->device_prep_slave_sg(dma->chan_rx, sg,
num, DMA_FROM_DEVICE,
num, DMA_DEV_TO_MEM,
DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
if (!desc_rx) {
dev_err(&data->master->dev, "%s:device_prep_slave_sg Failed\n",
@ -1124,7 +1124,7 @@ static void pch_spi_handle_dma(struct pch_spi_data *data, int *bpw)
}
sg = dma->sg_tx_p;
desc_tx = dma->chan_tx->device->device_prep_slave_sg(dma->chan_tx,
sg, num, DMA_TO_DEVICE,
sg, num, DMA_MEM_TO_DEV,
DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
if (!desc_tx) {
dev_err(&data->master->dev, "%s:device_prep_slave_sg Failed\n",

8
drivers/tty/serial/amba-pl011.c
View File

@ -268,7 +268,7 @@ static void pl011_dma_probe_initcall(struct uart_amba_port *uap)
struct dma_slave_config tx_conf = {
.dst_addr = uap->port.mapbase + UART01x_DR,
.dst_addr_width = DMA_SLAVE_BUSWIDTH_1_BYTE,
.direction = DMA_TO_DEVICE,
.direction = DMA_MEM_TO_DEV,
.dst_maxburst = uap->fifosize >> 1,
};
struct dma_chan *chan;
@ -301,7 +301,7 @@ static void pl011_dma_probe_initcall(struct uart_amba_port *uap)
struct dma_slave_config rx_conf = {
.src_addr = uap->port.mapbase + UART01x_DR,
.src_addr_width = DMA_SLAVE_BUSWIDTH_1_BYTE,
.direction = DMA_FROM_DEVICE,
.direction = DMA_DEV_TO_MEM,
.src_maxburst = uap->fifosize >> 1,
};
@ -480,7 +480,7 @@ static int pl011_dma_tx_refill(struct uart_amba_port *uap)
return -EBUSY;
}
desc = dma_dev->device_prep_slave_sg(chan, &dmatx->sg, 1, DMA_TO_DEVICE,
desc = dma_dev->device_prep_slave_sg(chan, &dmatx->sg, 1, DMA_MEM_TO_DEV,
DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
if (!desc) {
dma_unmap_sg(dma_dev->dev, &dmatx->sg, 1, DMA_TO_DEVICE);
@ -676,7 +676,7 @@ static int pl011_dma_rx_trigger_dma(struct uart_amba_port *uap)
&uap->dmarx.sgbuf_b : &uap->dmarx.sgbuf_a;
dma_dev = rxchan->device;
desc = rxchan->device->device_prep_slave_sg(rxchan, &sgbuf->sg, 1,
DMA_FROM_DEVICE,
DMA_DEV_TO_MEM,
DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
/*
* If the DMA engine is busy and cannot prepare a

4
drivers/tty/serial/pch_uart.c
View File

@ -764,7 +764,7 @@ static int dma_handle_rx(struct eg20t_port *priv)
sg_dma_address(sg) = priv->rx_buf_dma;
desc = priv->chan_rx->device->device_prep_slave_sg(priv->chan_rx,
sg, 1, DMA_FROM_DEVICE,
sg, 1, DMA_DEV_TO_MEM,
DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
if (!desc)
@ -923,7 +923,7 @@ static unsigned int dma_handle_tx(struct eg20t_port *priv)
}
desc = priv->chan_tx->device->device_prep_slave_sg(priv->chan_tx,
priv->sg_tx_p, nent, DMA_TO_DEVICE,
priv->sg_tx_p, nent, DMA_MEM_TO_DEV,
DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
if (!desc) {
dev_err(priv->port.dev, "%s:device_prep_slave_sg Failed\n",

4
drivers/tty/serial/sh-sci.c
View File

@ -1339,7 +1339,7 @@ static void sci_submit_rx(struct sci_port *s)
struct dma_async_tx_descriptor *desc;
desc = chan->device->device_prep_slave_sg(chan,
sg, 1, DMA_FROM_DEVICE, DMA_PREP_INTERRUPT);
sg, 1, DMA_DEV_TO_MEM, DMA_PREP_INTERRUPT);
if (desc) {
s->desc_rx[i] = desc;
@ -1454,7 +1454,7 @@ static void work_fn_tx(struct work_struct *work)
BUG_ON(!sg_dma_len(sg));
desc = chan->device->device_prep_slave_sg(chan,
sg, s->sg_len_tx, DMA_TO_DEVICE,
sg, s->sg_len_tx, DMA_MEM_TO_DEV,
DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
if (!desc) {
/* switch to PIO */

4
drivers/usb/musb/ux500_dma.c
View File

@ -84,7 +84,7 @@ static bool ux500_configure_channel(struct dma_channel *channel,
struct musb_hw_ep *hw_ep = ux500_channel->hw_ep;
struct dma_chan *dma_chan = ux500_channel->dma_chan;
struct dma_async_tx_descriptor *dma_desc;
enum dma_data_direction direction;
enum dma_transfer_direction direction;
struct scatterlist sg;
struct dma_slave_config slave_conf;
enum dma_slave_buswidth addr_width;
@ -104,7 +104,7 @@ static bool ux500_configure_channel(struct dma_channel *channel,
sg_dma_address(&sg) = dma_addr;
sg_dma_len(&sg) = len;
direction = ux500_channel->is_tx ? DMA_TO_DEVICE : DMA_FROM_DEVICE;
direction = ux500_channel->is_tx ? DMA_MEM_TO_DEV : DMA_DEV_TO_MEM;
addr_width = (len & 0x3) ? DMA_SLAVE_BUSWIDTH_1_BYTE :
DMA_SLAVE_BUSWIDTH_4_BYTES;

4
drivers/usb/renesas_usbhs/fifo.c
View File

@ -772,10 +772,10 @@ static void usbhsf_dma_prepare_tasklet(unsigned long data)
struct dma_async_tx_descriptor *desc;
struct dma_chan *chan = usbhsf_dma_chan_get(fifo, pkt);
struct device *dev = usbhs_priv_to_dev(priv);
enum dma_data_direction dir;
enum dma_transfer_direction dir;
dma_cookie_t cookie;
dir = usbhs_pipe_is_dir_in(pipe) ? DMA_FROM_DEVICE : DMA_TO_DEVICE;
dir = usbhs_pipe_is_dir_in(pipe) ? DMA_DEV_TO_MEM : DMA_MEM_TO_DEV;
sg_init_table(&sg, 1);
sg_set_page(&sg, virt_to_page(pkt->dma),

65
drivers/video/mx3fb.c
View File

@ -245,6 +245,7 @@ struct mx3fb_data {
uint32_t h_start_width;
uint32_t v_start_width;
enum disp_data_mapping disp_data_fmt;
};
struct dma_chan_request {
@ -287,11 +288,14 @@ static void mx3fb_write_reg(struct mx3fb_data *mx3fb, u32 value, unsigned long r
__raw_writel(value, mx3fb->reg_base + reg);
}
static const uint32_t di_mappings[] = {
0x1600AAAA, 0x00E05555, 0x00070000, 3, /* RGB888 */
0x0005000F, 0x000B000F, 0x0011000F, 1, /* RGB666 */
0x0011000F, 0x000B000F, 0x0005000F, 1, /* BGR666 */
0x0004003F, 0x000A000F, 0x000F003F, 1 /* RGB565 */
struct di_mapping {
uint32_t b0, b1, b2;
};
static const struct di_mapping di_mappings[] = {
[IPU_DISP_DATA_MAPPING_RGB666] = { 0x0005000f, 0x000b000f, 0x0011000f },
[IPU_DISP_DATA_MAPPING_RGB565] = { 0x0004003f, 0x000a000f, 0x000f003f },
[IPU_DISP_DATA_MAPPING_RGB888] = { 0x00070000, 0x000f0000, 0x00170000 },
};
static void sdc_fb_init(struct mx3fb_info *fbi)
@ -334,7 +338,7 @@ static void sdc_enable_channel(struct mx3fb_info *mx3_fbi)
/* This enables the channel */
if (mx3_fbi->cookie < 0) {
mx3_fbi->txd = dma_chan->device->device_prep_slave_sg(dma_chan,
&mx3_fbi->sg[0], 1, DMA_TO_DEVICE, DMA_PREP_INTERRUPT);
&mx3_fbi->sg[0], 1, DMA_MEM_TO_DEV, DMA_PREP_INTERRUPT);
if (!mx3_fbi->txd) {
dev_err(mx3fb->dev, "Cannot allocate descriptor on %d\n",
dma_chan->chan_id);
@ -425,7 +429,6 @@ static int sdc_set_window_pos(struct mx3fb_data *mx3fb, enum ipu_channel channel
* @pixel_clk: desired pixel clock frequency in Hz.
* @width: width of panel in pixels.
* @height: height of panel in pixels.
* @pixel_fmt: pixel format of buffer as FOURCC ASCII code.
* @h_start_width: number of pixel clocks between the HSYNC signal pulse
* and the start of valid data.
* @h_sync_width: width of the HSYNC signal in units of pixel clocks.
@ -442,7 +445,6 @@ static int sdc_set_window_pos(struct mx3fb_data *mx3fb, enum ipu_channel channel
static int sdc_init_panel(struct mx3fb_data *mx3fb, enum ipu_panel panel,
uint32_t pixel_clk,
uint16_t width, uint16_t height,
enum pixel_fmt pixel_fmt,
uint16_t h_start_width, uint16_t h_sync_width,
uint16_t h_end_width, uint16_t v_start_width,
uint16_t v_sync_width, uint16_t v_end_width,
@ -453,6 +455,7 @@ static int sdc_init_panel(struct mx3fb_data *mx3fb, enum ipu_panel panel,
uint32_t old_conf;
uint32_t div;
struct clk *ipu_clk;
const struct di_mapping *map;
dev_dbg(mx3fb->dev, "panel size = %d x %d", width, height);
@ -540,36 +543,10 @@ static int sdc_init_panel(struct mx3fb_data *mx3fb, enum ipu_panel panel,
sig.Vsync_pol << DI_D3_VSYNC_POL_SHIFT;
mx3fb_write_reg(mx3fb, old_conf, DI_DISP_SIG_POL);
switch (pixel_fmt) {
case IPU_PIX_FMT_RGB24:
mx3fb_write_reg(mx3fb, di_mappings[0], DI_DISP3_B0_MAP);
mx3fb_write_reg(mx3fb, di_mappings[1], DI_DISP3_B1_MAP);
mx3fb_write_reg(mx3fb, di_mappings[2], DI_DISP3_B2_MAP);
mx3fb_write_reg(mx3fb, mx3fb_read_reg(mx3fb, DI_DISP_ACC_CC) |
((di_mappings[3] - 1) << 12), DI_DISP_ACC_CC);
break;
case IPU_PIX_FMT_RGB666:
mx3fb_write_reg(mx3fb, di_mappings[4], DI_DISP3_B0_MAP);
mx3fb_write_reg(mx3fb, di_mappings[5], DI_DISP3_B1_MAP);
mx3fb_write_reg(mx3fb, di_mappings[6], DI_DISP3_B2_MAP);
mx3fb_write_reg(mx3fb, mx3fb_read_reg(mx3fb, DI_DISP_ACC_CC) |
((di_mappings[7] - 1) << 12), DI_DISP_ACC_CC);
break;
case IPU_PIX_FMT_BGR666:
mx3fb_write_reg(mx3fb, di_mappings[8], DI_DISP3_B0_MAP);
mx3fb_write_reg(mx3fb, di_mappings[9], DI_DISP3_B1_MAP);
mx3fb_write_reg(mx3fb, di_mappings[10], DI_DISP3_B2_MAP);
mx3fb_write_reg(mx3fb, mx3fb_read_reg(mx3fb, DI_DISP_ACC_CC) |
((di_mappings[11] - 1) << 12), DI_DISP_ACC_CC);
break;
default:
mx3fb_write_reg(mx3fb, di_mappings[12], DI_DISP3_B0_MAP);
mx3fb_write_reg(mx3fb, di_mappings[13], DI_DISP3_B1_MAP);
mx3fb_write_reg(mx3fb, di_mappings[14], DI_DISP3_B2_MAP);
mx3fb_write_reg(mx3fb, mx3fb_read_reg(mx3fb, DI_DISP_ACC_CC) |
((di_mappings[15] - 1) << 12), DI_DISP_ACC_CC);
break;
}
map = &di_mappings[mx3fb->disp_data_fmt];
mx3fb_write_reg(mx3fb, map->b0, DI_DISP3_B0_MAP);
mx3fb_write_reg(mx3fb, map->b1, DI_DISP3_B1_MAP);
mx3fb_write_reg(mx3fb, map->b2, DI_DISP3_B2_MAP);
spin_unlock_irqrestore(&mx3fb->lock, lock_flags);
@ -780,8 +757,6 @@ static int __set_par(struct fb_info *fbi, bool lock)
if (sdc_init_panel(mx3fb, mode,
(PICOS2KHZ(fbi->var.pixclock)) * 1000UL,
fbi->var.xres, fbi->var.yres,
(fbi->var.sync & FB_SYNC_SWAP_RGB) ?
IPU_PIX_FMT_BGR666 : IPU_PIX_FMT_RGB666,
fbi->var.left_margin,
fbi->var.hsync_len,
fbi->var.right_margin +
@ -1117,7 +1092,7 @@ static int mx3fb_pan_display(struct fb_var_screeninfo *var,
async_tx_ack(mx3_fbi->txd);
txd = dma_chan->device->device_prep_slave_sg(dma_chan, sg +
mx3_fbi->cur_ipu_buf, 1, DMA_TO_DEVICE, DMA_PREP_INTERRUPT);
mx3_fbi->cur_ipu_buf, 1, DMA_MEM_TO_DEV, DMA_PREP_INTERRUPT);
if (!txd) {
dev_err(fbi->device,
"Error preparing a DMA transaction descriptor.\n");
@ -1349,6 +1324,12 @@ static int init_fb_chan(struct mx3fb_data *mx3fb, struct idmac_channel *ichan)
const struct fb_videomode *mode;
int ret, num_modes;
if (mx3fb_pdata->disp_data_fmt >= ARRAY_SIZE(di_mappings)) {
dev_err(dev, "Illegal display data format %d\n",
mx3fb_pdata->disp_data_fmt);
return -EINVAL;
}
ichan->client = mx3fb;
irq = ichan->eof_irq;
@ -1402,6 +1383,8 @@ static int init_fb_chan(struct mx3fb_data *mx3fb, struct idmac_channel *ichan)
mx3fbi->mx3fb = mx3fb;
mx3fbi->blank = FB_BLANK_NORMAL;
mx3fb->disp_data_fmt = mx3fb_pdata->disp_data_fmt;
init_completion(&mx3fbi->flip_cmpl);
disable_irq(ichan->eof_irq);
dev_dbg(mx3fb->dev, "disabling irq %d\n", ichan->eof_irq);

4
include/linux/amba/pl08x.h
View File

@ -134,7 +134,7 @@ struct pl08x_txd {
struct dma_async_tx_descriptor tx;
struct list_head node;
struct list_head dsg_list;
enum dma_data_direction direction;
enum dma_transfer_direction direction;
dma_addr_t llis_bus;
struct pl08x_lli *llis_va;
/* Default cctl value for LLIs */
@ -197,7 +197,7 @@ struct pl08x_dma_chan {
dma_addr_t dst_addr;
u32 src_cctl;
u32 dst_cctl;
enum dma_data_direction runtime_direction;
enum dma_transfer_direction runtime_direction;
dma_cookie_t lc;
struct list_head pend_list;
struct pl08x_txd *at;

99
include/linux/dmaengine.h
View File

@ -23,7 +23,6 @@
#include <linux/device.h>
#include <linux/uio.h>
#include <linux/dma-direction.h>
#include <linux/scatterlist.h>
#include <linux/bitmap.h>
#include <asm/page.h>
@ -72,11 +71,93 @@ enum dma_transaction_type {
DMA_ASYNC_TX,
DMA_SLAVE,
DMA_CYCLIC,
DMA_INTERLEAVE,
/* last transaction type for creation of the capabilities mask */
DMA_TX_TYPE_END,
};
/* last transaction type for creation of the capabilities mask */
#define DMA_TX_TYPE_END (DMA_CYCLIC + 1)
/**
* enum dma_transfer_direction - dma transfer mode and direction indicator
* @DMA_MEM_TO_MEM: Async/Memcpy mode
* @DMA_MEM_TO_DEV: Slave mode & From Memory to Device
* @DMA_DEV_TO_MEM: Slave mode & From Device to Memory
* @DMA_DEV_TO_DEV: Slave mode & From Device to Device
*/
enum dma_transfer_direction {
DMA_MEM_TO_MEM,
DMA_MEM_TO_DEV,
DMA_DEV_TO_MEM,
DMA_DEV_TO_DEV,
DMA_TRANS_NONE,
};
/**
* Interleaved Transfer Request
* ----------------------------
* A chunk is collection of contiguous bytes to be transfered.
* The gap(in bytes) between two chunks is called inter-chunk-gap(ICG).
* ICGs may or maynot change between chunks.
* A FRAME is the smallest series of contiguous {chunk,icg} pairs,
* that when repeated an integral number of times, specifies the transfer.
* A transfer template is specification of a Frame, the number of times
* it is to be repeated and other per-transfer attributes.
*
* Practically, a client driver would have ready a template for each
* type of transfer it is going to need during its lifetime and
* set only 'src_start' and 'dst_start' before submitting the requests.
*
*
* | Frame-1 | Frame-2 | ~ | Frame-'numf' |
* |====....==.===...=...|====....==.===...=...| ~ |====....==.===...=...|
*
* == Chunk size
* ... ICG
*/
/**
* struct data_chunk - Element of scatter-gather list that makes a frame.
* @size: Number of bytes to read from source.
* size_dst := fn(op, size_src), so doesn't mean much for destination.
* @icg: Number of bytes to jump after last src/dst address of this
* chunk and before first src/dst address for next chunk.
* Ignored for dst(assumed 0), if dst_inc is true and dst_sgl is false.
* Ignored for src(assumed 0), if src_inc is true and src_sgl is false.
*/
struct data_chunk {
size_t size;
size_t icg;
};
/**
* struct dma_interleaved_template - Template to convey DMAC the transfer pattern
* and attributes.
* @src_start: Bus address of source for the first chunk.
* @dst_start: Bus address of destination for the first chunk.
* @dir: Specifies the type of Source and Destination.
* @src_inc: If the source address increments after reading from it.
* @dst_inc: If the destination address increments after writing to it.
* @src_sgl: If the 'icg' of sgl[] applies to Source (scattered read).
* Otherwise, source is read contiguously (icg ignored).
* Ignored if src_inc is false.
* @dst_sgl: If the 'icg' of sgl[] applies to Destination (scattered write).
* Otherwise, destination is filled contiguously (icg ignored).
* Ignored if dst_inc is false.
* @numf: Number of frames in this template.
* @frame_size: Number of chunks in a frame i.e, size of sgl[].
* @sgl: Array of {chunk,icg} pairs that make up a frame.
*/
struct dma_interleaved_template {
dma_addr_t src_start;
dma_addr_t dst_start;
enum dma_transfer_direction dir;
bool src_inc;
bool dst_inc;
bool src_sgl;
bool dst_sgl;
size_t numf;
size_t frame_size;
struct data_chunk sgl[0];
};
/**
* enum dma_ctrl_flags - DMA flags to augment operation preparation,
@ -269,7 +350,7 @@ enum dma_slave_buswidth {
* struct, if applicable.
*/
struct dma_slave_config {
enum dma_data_direction direction;
enum dma_transfer_direction direction;
dma_addr_t src_addr;
dma_addr_t dst_addr;
enum dma_slave_buswidth src_addr_width;
@ -433,6 +514,7 @@ struct dma_tx_state {
* @device_prep_dma_cyclic: prepare a cyclic dma operation suitable for audio.
* The function takes a buffer of size buf_len. The callback function will
* be called after period_len bytes have been transferred.
* @device_prep_interleaved_dma: Transfer expression in a generic way.
* @device_control: manipulate all pending operations on a channel, returns
* zero or error code
* @device_tx_status: poll for transaction completion, the optional
@ -492,11 +574,14 @@ struct dma_device {
struct dma_async_tx_descriptor *(*device_prep_slave_sg)(
struct dma_chan *chan, struct scatterlist *sgl,
unsigned int sg_len, enum dma_data_direction direction,
unsigned int sg_len, enum dma_transfer_direction direction,
unsigned long flags);
struct dma_async_tx_descriptor *(*device_prep_dma_cyclic)(
struct dma_chan *chan, dma_addr_t buf_addr, size_t buf_len,
size_t period_len, enum dma_data_direction direction);
size_t period_len, enum dma_transfer_direction direction);
struct dma_async_tx_descriptor *(*device_prep_interleaved_dma)(
struct dma_chan *chan, struct dma_interleaved_template *xt,
unsigned long flags);
int (*device_control)(struct dma_chan *chan, enum dma_ctrl_cmd cmd,
unsigned long arg);
@ -522,7 +607,7 @@ static inline int dmaengine_slave_config(struct dma_chan *chan,
static inline struct dma_async_tx_descriptor *dmaengine_prep_slave_single(
struct dma_chan *chan, void *buf, size_t len,
enum dma_data_direction dir, unsigned long flags)
enum dma_transfer_direction dir, unsigned long flags)
{
struct scatterlist sg;
sg_init_one(&sg, buf, len);

2
include/linux/dw_dmac.h
View File

@ -127,7 +127,7 @@ struct dw_cyclic_desc {
struct dw_cyclic_desc *dw_dma_cyclic_prep(struct dma_chan *chan,
dma_addr_t buf_addr, size_t buf_len, size_t period_len,
enum dma_data_direction direction);
enum dma_transfer_direction direction);
void dw_dma_cyclic_free(struct dma_chan *chan);
int dw_dma_cyclic_start(struct dma_chan *chan);
void dw_dma_cyclic_stop(struct dma_chan *chan);

68
include/linux/mtd/gpmi-nand.h Normal file
View File

@ -0,0 +1,68 @@
/*
* Copyright (C) 2011 Freescale Semiconductor, Inc. All Rights Reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#ifndef __MACH_MXS_GPMI_NAND_H__
#define __MACH_MXS_GPMI_NAND_H__
/* The size of the resources is fixed. */
#define GPMI_NAND_RES_SIZE 6
/* Resource names for the GPMI NAND driver. */
#define GPMI_NAND_GPMI_REGS_ADDR_RES_NAME "GPMI NAND GPMI Registers"
#define GPMI_NAND_GPMI_INTERRUPT_RES_NAME "GPMI NAND GPMI Interrupt"
#define GPMI_NAND_BCH_REGS_ADDR_RES_NAME "GPMI NAND BCH Registers"
#define GPMI_NAND_BCH_INTERRUPT_RES_NAME "GPMI NAND BCH Interrupt"
#define GPMI_NAND_DMA_CHANNELS_RES_NAME "GPMI NAND DMA Channels"
#define GPMI_NAND_DMA_INTERRUPT_RES_NAME "GPMI NAND DMA Interrupt"
/**
* struct gpmi_nand_platform_data - GPMI NAND driver platform data.
*
* This structure communicates platform-specific information to the GPMI NAND
* driver that can't be expressed as resources.
*
* @platform_init: A pointer to a function the driver will call to
* initialize the platform (e.g., set up the pin mux).
* @min_prop_delay_in_ns: Minimum propagation delay of GPMI signals to and
* from the NAND Flash device, in nanoseconds.
* @max_prop_delay_in_ns: Maximum propagation delay of GPMI signals to and
* from the NAND Flash device, in nanoseconds.
* @max_chip_count: The maximum number of chips for which the driver
* should configure the hardware. This value most
* likely reflects the number of pins that are
* connected to a NAND Flash device. If this is
* greater than the SoC hardware can support, the
* driver will print a message and fail to initialize.
* @partitions: An optional pointer to an array of partition
* descriptions.
* @partition_count: The number of elements in the partitions array.
*/
struct gpmi_nand_platform_data {
/* SoC hardware information. */
int (*platform_init)(void);
/* NAND Flash information. */
unsigned int min_prop_delay_in_ns;
unsigned int max_prop_delay_in_ns;
unsigned int max_chip_count;
/* Medium information. */
struct mtd_partition *partitions;
unsigned partition_count;
};
#endif

4
include/linux/sh_dma.h
View File

@ -30,7 +30,7 @@ struct sh_desc {
struct sh_dmae_regs hw;
struct list_head node;
struct dma_async_tx_descriptor async_tx;
enum dma_data_direction direction;
enum dma_transfer_direction direction;
dma_cookie_t cookie;
size_t partial;
int chunks;
@ -48,6 +48,7 @@ struct sh_dmae_channel {
unsigned int offset;
unsigned int dmars;
unsigned int dmars_bit;
unsigned int chclr_offset;
};
struct sh_dmae_pdata {
@ -68,6 +69,7 @@ struct sh_dmae_pdata {
unsigned int dmaor_is_32bit:1;
unsigned int needs_tend_set:1;
unsigned int no_dmars:1;
unsigned int chclr_present:1;
};
/* DMA register */

6
include/linux/sirfsoc_dma.h Normal file
View File

@ -0,0 +1,6 @@
#ifndef _SIRFSOC_DMA_H_
#define _SIRFSOC_DMA_H_
bool sirfsoc_dma_filter_id(struct dma_chan *chan, void *chan_id);
#endif

2
sound/atmel/abdac.c
View File

@ -133,7 +133,7 @@ static int atmel_abdac_prepare_dma(struct atmel_abdac *dac,
period_len = frames_to_bytes(runtime, runtime->period_size);
cdesc = dw_dma_cyclic_prep(chan, runtime->dma_addr, buffer_len,
period_len, DMA_TO_DEVICE);
period_len, DMA_MEM_TO_DEV);
if (IS_ERR(cdesc)) {
dev_dbg(&dac->pdev->dev, "could not prepare cyclic DMA\n");
return PTR_ERR(cdesc);

10
sound/atmel/ac97c.c
View File

@ -102,7 +102,7 @@ static void atmel_ac97c_dma_capture_period_done(void *arg)
static int atmel_ac97c_prepare_dma(struct atmel_ac97c *chip,
struct snd_pcm_substream *substream,
enum dma_data_direction direction)
enum dma_transfer_direction direction)
{
struct dma_chan *chan;
struct dw_cyclic_desc *cdesc;
@ -118,7 +118,7 @@ static int atmel_ac97c_prepare_dma(struct atmel_ac97c *chip,
return -EINVAL;
}
if (direction == DMA_TO_DEVICE)
if (direction == DMA_MEM_TO_DEV)
chan = chip->dma.tx_chan;
else
chan = chip->dma.rx_chan;
@ -133,7 +133,7 @@ static int atmel_ac97c_prepare_dma(struct atmel_ac97c *chip,
return PTR_ERR(cdesc);
}
if (direction == DMA_TO_DEVICE) {
if (direction == DMA_MEM_TO_DEV) {
cdesc->period_callback = atmel_ac97c_dma_playback_period_done;
set_bit(DMA_TX_READY, &chip->flags);
} else {
@ -393,7 +393,7 @@ static int atmel_ac97c_playback_prepare(struct snd_pcm_substream *substream)
if (cpu_is_at32ap7000()) {
if (!test_bit(DMA_TX_READY, &chip->flags))
retval = atmel_ac97c_prepare_dma(chip, substream,
DMA_TO_DEVICE);
DMA_MEM_TO_DEV);
} else {
/* Initialize and start the PDC */
writel(runtime->dma_addr, chip->regs + ATMEL_PDC_TPR);
@ -484,7 +484,7 @@ static int atmel_ac97c_capture_prepare(struct snd_pcm_substream *substream)
if (cpu_is_at32ap7000()) {
if (!test_bit(DMA_RX_READY, &chip->flags))
retval = atmel_ac97c_prepare_dma(chip, substream,
DMA_FROM_DEVICE);
DMA_DEV_TO_MEM);
} else {
/* Initialize and start the PDC */
writel(runtime->dma_addr, chip->regs + ATMEL_PDC_RPR);

4
sound/soc/ep93xx/ep93xx-pcm.c
View File

@ -113,9 +113,9 @@ static int ep93xx_pcm_open(struct snd_pcm_substream *substream)
rtd->dma_data.name = dma_params->name;
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
rtd->dma_data.direction = DMA_TO_DEVICE;
rtd->dma_data.direction = DMA_MEM_TO_DEV;
else
rtd->dma_data.direction = DMA_FROM_DEVICE;
rtd->dma_data.direction = DMA_DEV_TO_MEM;
rtd->dma_chan = dma_request_channel(mask, ep93xx_pcm_dma_filter,
&rtd->dma_data);

6
sound/soc/imx/imx-pcm-dma-mx2.c
View File

@ -107,12 +107,12 @@ static int imx_ssi_dma_alloc(struct snd_pcm_substream *substream,
}
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
slave_config.direction = DMA_TO_DEVICE;
slave_config.direction = DMA_MEM_TO_DEV;
slave_config.dst_addr = dma_params->dma_addr;
slave_config.dst_addr_width = buswidth;
slave_config.dst_maxburst = dma_params->burstsize;
} else {
slave_config.direction = DMA_FROM_DEVICE;
slave_config.direction = DMA_DEV_TO_MEM;
slave_config.src_addr = dma_params->dma_addr;
slave_config.src_addr_width = buswidth;
slave_config.src_maxburst = dma_params->burstsize;
@ -159,7 +159,7 @@ static int snd_imx_pcm_hw_params(struct snd_pcm_substream *substream,
iprtd->period_bytes * iprtd->periods,
iprtd->period_bytes,
substream->stream == SNDRV_PCM_STREAM_PLAYBACK ?
DMA_TO_DEVICE : DMA_FROM_DEVICE);
DMA_MEM_TO_DEV : DMA_DEV_TO_MEM);
if (!iprtd->desc) {
dev_err(&chan->dev->device, "cannot prepare slave dma\n");
return -EINVAL;

2
sound/soc/mxs/mxs-pcm.c
View File

@ -136,7 +136,7 @@ static int snd_mxs_pcm_hw_params(struct snd_pcm_substream *substream,
iprtd->period_bytes * iprtd->periods,
iprtd->period_bytes,
substream->stream == SNDRV_PCM_STREAM_PLAYBACK ?
DMA_TO_DEVICE : DMA_FROM_DEVICE);
DMA_MEM_TO_DEV : DMA_DEV_TO_MEM);
if (!iprtd->desc) {
dev_err(&chan->dev->device, "cannot prepare slave dma\n");
return -EINVAL;

4
sound/soc/samsung/dma.c
View File

@ -86,7 +86,7 @@ static void dma_enqueue(struct snd_pcm_substream *substream)
dma_info.cap = (samsung_dma_has_circular() ? DMA_CYCLIC : DMA_SLAVE);
dma_info.direction =
(substream->stream == SNDRV_PCM_STREAM_PLAYBACK
? DMA_TO_DEVICE : DMA_FROM_DEVICE);
? DMA_MEM_TO_DEV : DMA_DEV_TO_MEM);
dma_info.fp = audio_buffdone;
dma_info.fp_param = substream;
dma_info.period = prtd->dma_period;
@ -171,7 +171,7 @@ static int dma_hw_params(struct snd_pcm_substream *substream,
dma_info.client = prtd->params->client;
dma_info.direction =
(substream->stream == SNDRV_PCM_STREAM_PLAYBACK
? DMA_TO_DEVICE : DMA_FROM_DEVICE);
? DMA_MEM_TO_DEV : DMA_DEV_TO_MEM);
dma_info.width = prtd->params->dma_size;
dma_info.fifo = prtd->params->dma_addr;
prtd->params->ch = prtd->params->ops->request(

4
sound/soc/sh/siu_pcm.c
View File

@ -131,7 +131,7 @@ static int siu_pcm_wr_set(struct siu_port *port_info,
sg_dma_address(&sg) = buff;
desc = siu_stream->chan->device->device_prep_slave_sg(siu_stream->chan,
&sg, 1, DMA_TO_DEVICE, DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
&sg, 1, DMA_MEM_TO_DEV, DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
if (!desc) {
dev_err(dev, "Failed to allocate a dma descriptor\n");
return -ENOMEM;
@ -181,7 +181,7 @@ static int siu_pcm_rd_set(struct siu_port *port_info,
sg_dma_address(&sg) = buff;
desc = siu_stream->chan->device->device_prep_slave_sg(siu_stream->chan,
&sg, 1, DMA_FROM_DEVICE, DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
&sg, 1, DMA_DEV_TO_MEM, DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
if (!desc) {
dev_err(dev, "Failed to allocate dma descriptor\n");
return -ENOMEM;

2
sound/soc/txx9/txx9aclc.c
View File

@ -134,7 +134,7 @@ txx9aclc_dma_submit(struct txx9aclc_dmadata *dmadata, dma_addr_t buf_dma_addr)
sg_dma_address(&sg) = buf_dma_addr;
desc = chan->device->device_prep_slave_sg(chan, &sg, 1,
dmadata->substream->stream == SNDRV_PCM_STREAM_PLAYBACK ?
DMA_TO_DEVICE : DMA_FROM_DEVICE,
DMA_MEM_TO_DEV : DMA_DEV_TO_MEM,
DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
if (!desc) {
dev_err(&chan->dev->device, "cannot prepare slave dma\n");