leandrof/linux
1
0
Fork 0
forked from Minki/linux
Code Issues Pull Requests Packages Projects Releases Wiki Activity

ASoC: add DAI and platform / DMA drivers for SH SIU

Browse Source 
Several SuperH platforms, including sh7722, sh7343, sh7354, sh7367 include
a Sound Interface Unit (SIU). This patch adds DAI and platform / DMA
drivers for this interface.

Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Acked-by: Liam Girdwood <lrg@slimlogic.co.uk>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
This commit is contained in:
Guennadi Liakhovetski 2010-01-22 19:09:03 +01:00 committed by Mark Brown
parent 6c2fb6a8d8
commit 895d4509d0
6 changed files with 1690 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

26
arch/sh/include/asm/siu.h Normal file
View File

@ -0,0 +1,26 @@
/*
* platform header for the SIU ASoC driver
*
* Copyright (C) 2009-2010 Guennadi Liakhovetski <g.liakhovetski@gmx.de>
*
* 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
* published by the Free Software Foundation.
*/
#ifndef ASM_SIU_H
#define ASM_SIU_H
#include <asm/dma-sh.h>
struct device;
struct siu_platform {
struct device *dma_dev;
enum sh_dmae_slave_chan_id dma_slave_tx_a;
enum sh_dmae_slave_chan_id dma_slave_rx_a;
enum sh_dmae_slave_chan_id dma_slave_tx_b;
enum sh_dmae_slave_chan_id dma_slave_rx_b;
};
#endif /* ASM_SIU_H */

6
sound/soc/sh/Kconfig
View File

@ -26,6 +26,12 @@ config SND_SOC_SH4_FSI
help
This option enables FSI sound support
config SND_SOC_SH4_SIU
tristate
depends on (SUPERH || ARCH_SHMOBILE) && HAVE_CLK
select DMADEVICES
select SH_DMAE
##
## Boards
##

2
sound/soc/sh/Makefile
View File

@ -6,9 +6,11 @@ obj-$(CONFIG_SND_SOC_PCM_SH7760) += snd-soc-dma-sh7760.o
snd-soc-hac-objs := hac.o
snd-soc-ssi-objs := ssi.o
snd-soc-fsi-objs := fsi.o
snd-soc-siu-objs := siu_pcm.o siu_dai.o
obj-$(CONFIG_SND_SOC_SH4_HAC) += snd-soc-hac.o
obj-$(CONFIG_SND_SOC_SH4_SSI) += snd-soc-ssi.o
obj-$(CONFIG_SND_SOC_SH4_FSI) += snd-soc-fsi.o
obj-$(CONFIG_SND_SOC_SH4_SIU) += snd-soc-siu.o
## boards
snd-soc-sh7760-ac97-objs := sh7760-ac97.o

193
sound/soc/sh/siu.h Normal file
View File

@ -0,0 +1,193 @@
/*
* siu.h - ALSA SoC driver for Renesas SH7343, SH7722 SIU peripheral.
*
* Copyright (C) 2009-2010 Guennadi Liakhovetski <g.liakhovetski@gmx.de>
* Copyright (C) 2006 Carlos Munoz <carlos@kenati.com>
*
* 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., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#ifndef SIU_H
#define SIU_H
/* Common kernel and user-space firmware-building defines and types */
#define YRAM0_SIZE (0x0040 / 4) /* 16 */
#define YRAM1_SIZE (0x0080 / 4) /* 32 */
#define YRAM2_SIZE (0x0040 / 4) /* 16 */
#define YRAM3_SIZE (0x0080 / 4) /* 32 */
#define YRAM4_SIZE (0x0080 / 4) /* 32 */
#define YRAM_DEF_SIZE (YRAM0_SIZE + YRAM1_SIZE + YRAM2_SIZE + \
YRAM3_SIZE + YRAM4_SIZE)
#define YRAM_FIR_SIZE (0x0400 / 4) /* 256 */
#define YRAM_IIR_SIZE (0x0200 / 4) /* 128 */
#define XRAM0_SIZE (0x0400 / 4) /* 256 */
#define XRAM1_SIZE (0x0200 / 4) /* 128 */
#define XRAM2_SIZE (0x0200 / 4) /* 128 */
/* PRAM program array size */
#define PRAM0_SIZE (0x0100 / 4) /* 64 */
#define PRAM1_SIZE ((0x2000 - 0x0100) / 4) /* 1984 */
#include <linux/types.h>
struct siu_spb_param {
__u32 ab1a; /* input FIFO address */
__u32 ab0a; /* output FIFO address */
__u32 dir; /* 0=the ather except CPUOUTPUT, 1=CPUINPUT */
__u32 event; /* SPB program starting conditions */
__u32 stfifo; /* STFIFO register setting value */
__u32 trdat; /* TRDAT register setting value */
};
struct siu_firmware {
__u32 yram_fir_coeff[YRAM_FIR_SIZE];
__u32 pram0[PRAM0_SIZE];
__u32 pram1[PRAM1_SIZE];
__u32 yram0[YRAM0_SIZE];
__u32 yram1[YRAM1_SIZE];
__u32 yram2[YRAM2_SIZE];
__u32 yram3[YRAM3_SIZE];
__u32 yram4[YRAM4_SIZE];
__u32 spbpar_num;
struct siu_spb_param spbpar[32];
};
#ifdef __KERNEL__
#include <linux/dmaengine.h>
#include <linux/interrupt.h>
#include <linux/io.h>
#include <asm/dma-sh.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/soc-dai.h>
#define SIU_PERIOD_BYTES_MAX 8192 /* DMA transfer/period size */
#define SIU_PERIOD_BYTES_MIN 256 /* DMA transfer/period size */
#define SIU_PERIODS_MAX 64 /* Max periods in buffer */
#define SIU_PERIODS_MIN 4 /* Min periods in buffer */
#define SIU_BUFFER_BYTES_MAX (SIU_PERIOD_BYTES_MAX * SIU_PERIODS_MAX)
/* SIU ports: only one can be used at a time */
enum {
SIU_PORT_A,
SIU_PORT_B,
SIU_PORT_NUM,
};
/* SIU clock configuration */
enum {
SIU_CLKA_PLL,
SIU_CLKA_EXT,
SIU_CLKB_PLL,
SIU_CLKB_EXT
};
struct siu_info {
int port_id;
u32 __iomem *pram;
u32 __iomem *xram;
u32 __iomem *yram;
u32 __iomem *reg;
struct siu_firmware fw;
};
struct siu_stream {
struct tasklet_struct tasklet;
struct snd_pcm_substream *substream;
snd_pcm_format_t format;
size_t buf_bytes;
size_t period_bytes;
int cur_period; /* Period currently in dma */
u32 volume;
snd_pcm_sframes_t xfer_cnt; /* Number of frames */
u8 rw_flg; /* transfer status */
/* DMA status */
struct dma_chan *chan; /* DMA channel */
struct dma_async_tx_descriptor *tx_desc;
dma_cookie_t cookie;
struct sh_dmae_slave param;
};
struct siu_port {
unsigned long play_cap; /* Used to track full duplex */
struct snd_pcm *pcm;
struct siu_stream playback;
struct siu_stream capture;
u32 stfifo; /* STFIFO value from firmware */
u32 trdat; /* TRDAT value from firmware */
};
extern struct siu_port *siu_ports[SIU_PORT_NUM];
static inline struct siu_port *siu_port_info(struct snd_pcm_substream *substream)
{
struct platform_device *pdev =
to_platform_device(substream->pcm->card->dev);
return siu_ports[pdev->id];
}
/* Register access */
static inline void siu_write32(u32 __iomem *addr, u32 val)
{
__raw_writel(val, addr);
}
static inline u32 siu_read32(u32 __iomem *addr)
{
return __raw_readl(addr);
}
/* SIU registers */
#define SIU_IFCTL (0x000 / sizeof(u32))
#define SIU_SRCTL (0x004 / sizeof(u32))
#define SIU_SFORM (0x008 / sizeof(u32))
#define SIU_CKCTL (0x00c / sizeof(u32))
#define SIU_TRDAT (0x010 / sizeof(u32))
#define SIU_STFIFO (0x014 / sizeof(u32))
#define SIU_DPAK (0x01c / sizeof(u32))
#define SIU_CKREV (0x020 / sizeof(u32))
#define SIU_EVNTC (0x028 / sizeof(u32))
#define SIU_SBCTL (0x040 / sizeof(u32))
#define SIU_SBPSET (0x044 / sizeof(u32))
#define SIU_SBFSTS (0x068 / sizeof(u32))
#define SIU_SBDVCA (0x06c / sizeof(u32))
#define SIU_SBDVCB (0x070 / sizeof(u32))
#define SIU_SBACTIV (0x074 / sizeof(u32))
#define SIU_DMAIA (0x090 / sizeof(u32))
#define SIU_DMAIB (0x094 / sizeof(u32))
#define SIU_DMAOA (0x098 / sizeof(u32))
#define SIU_DMAOB (0x09c / sizeof(u32))
#define SIU_DMAML (0x0a0 / sizeof(u32))
#define SIU_SPSTS (0x0cc / sizeof(u32))
#define SIU_SPCTL (0x0d0 / sizeof(u32))
#define SIU_BRGASEL (0x100 / sizeof(u32))
#define SIU_BRRA (0x104 / sizeof(u32))
#define SIU_BRGBSEL (0x108 / sizeof(u32))
#define SIU_BRRB (0x10c / sizeof(u32))
extern struct snd_soc_platform siu_platform;
extern struct snd_soc_dai siu_i2s_dai;
int siu_init_port(int port, struct siu_port **port_info, struct snd_card *card);
void siu_free_port(struct siu_port *port_info);
#endif
#endif /* SIU_H */

847
sound/soc/sh/siu_dai.c Normal file
View File

@ -0,0 +1,847 @@
/*
* siu_dai.c - ALSA SoC driver for Renesas SH7343, SH7722 SIU peripheral.
*
* Copyright (C) 2009-2010 Guennadi Liakhovetski <g.liakhovetski@gmx.de>
* Copyright (C) 2006 Carlos Munoz <carlos@kenati.com>
*
* 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., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <linux/delay.h>
#include <linux/firmware.h>
#include <linux/pm_runtime.h>
#include <asm/clock.h>
#include <asm/siu.h>
#include <sound/control.h>
#include <sound/soc-dai.h>
#include "siu.h"
/* Board specifics */
#if defined(CONFIG_CPU_SUBTYPE_SH7722)
# define SIU_MAX_VOLUME 0x1000
#else
# define SIU_MAX_VOLUME 0x7fff
#endif
#define PRAM_SIZE 0x2000
#define XRAM_SIZE 0x800
#define YRAM_SIZE 0x800
#define XRAM_OFFSET 0x4000
#define YRAM_OFFSET 0x6000
#define REG_OFFSET 0xc000
#define PLAYBACK_ENABLED 1
#define CAPTURE_ENABLED 2
#define VOLUME_CAPTURE 0
#define VOLUME_PLAYBACK 1
#define DFLT_VOLUME_LEVEL 0x08000800
/*
* SPDIF is only available on port A and on some SIU implementations it is only
* available for input. Due to the lack of hardware to test it, SPDIF is left
* disabled in this driver version
*/
struct format_flag {
u32 i2s;
u32 pcm;
u32 spdif;
u32 mask;
};
struct port_flag {
struct format_flag playback;
struct format_flag capture;
};
static struct port_flag siu_flags[SIU_PORT_NUM] = {
[SIU_PORT_A] = {
.playback = {
.i2s = 0x50000000,
.pcm = 0x40000000,
.spdif = 0x80000000, /* not on all SIU versions */
.mask = 0xd0000000,
},
.capture = {
.i2s = 0x05000000,
.pcm = 0x04000000,
.spdif = 0x08000000,
.mask = 0x0d000000,
},
},
[SIU_PORT_B] = {
.playback = {
.i2s = 0x00500000,
.pcm = 0x00400000,
.spdif = 0, /* impossible - turn off */
.mask = 0x00500000,
},
.capture = {
.i2s = 0x00050000,
.pcm = 0x00040000,
.spdif = 0, /* impossible - turn off */
.mask = 0x00050000,
},
},
};
static void siu_dai_start(struct siu_port *port_info)
{
struct siu_info *info = siu_i2s_dai.private_data;
u32 __iomem *base = info->reg;
dev_dbg(port_info->pcm->card->dev, "%s\n", __func__);
/* Turn on SIU clock */
pm_runtime_get_sync(siu_i2s_dai.dev);
/* Issue software reset to siu */
siu_write32(base + SIU_SRCTL, 0);
/* Wait for the reset to take effect */
udelay(1);
port_info->stfifo = 0;
port_info->trdat = 0;
/* portA, portB, SIU operate */
siu_write32(base + SIU_SRCTL, 0x301);
/* portA=256fs, portB=256fs */
siu_write32(base + SIU_CKCTL, 0x40400000);
/* portA's BRG does not divide SIUCKA */
siu_write32(base + SIU_BRGASEL, 0);
siu_write32(base + SIU_BRRA, 0);
/* portB's BRG divides SIUCKB by half */
siu_write32(base + SIU_BRGBSEL, 1);
siu_write32(base + SIU_BRRB, 0);
siu_write32(base + SIU_IFCTL, 0x44440000);
/* portA: 32 bit/fs, master; portB: 32 bit/fs, master */
siu_write32(base + SIU_SFORM, 0x0c0c0000);
/*
* Volume levels: looks like the DSP firmware implements volume controls
* differently from what's described in the datasheet
*/
siu_write32(base + SIU_SBDVCA, port_info->playback.volume);
siu_write32(base + SIU_SBDVCB, port_info->capture.volume);
}
static void siu_dai_stop(void)
{
struct siu_info *info = siu_i2s_dai.private_data;
u32 __iomem *base = info->reg;
/* SIU software reset */
siu_write32(base + SIU_SRCTL, 0);
/* Turn off SIU clock */
pm_runtime_put_sync(siu_i2s_dai.dev);
}
static void siu_dai_spbAselect(struct siu_port *port_info)
{
struct siu_info *info = siu_i2s_dai.private_data;
struct siu_firmware *fw = &info->fw;
u32 *ydef = fw->yram0;
u32 idx;
/* path A use */
if (!info->port_id)
idx = 1; /* portA */
else
idx = 2; /* portB */
ydef[0] = (fw->spbpar[idx].ab1a << 16) |
(fw->spbpar[idx].ab0a << 8) |
(fw->spbpar[idx].dir << 7) | 3;
ydef[1] = fw->yram0[1]; /* 0x03000300 */
ydef[2] = (16 / 2) << 24;
ydef[3] = fw->yram0[3]; /* 0 */
ydef[4] = fw->yram0[4]; /* 0 */
ydef[7] = fw->spbpar[idx].event;
port_info->stfifo |= fw->spbpar[idx].stfifo;
port_info->trdat |= fw->spbpar[idx].trdat;
}
static void siu_dai_spbBselect(struct siu_port *port_info)
{
struct siu_info *info = siu_i2s_dai.private_data;
struct siu_firmware *fw = &info->fw;
u32 *ydef = fw->yram0;
u32 idx;
/* path B use */
if (!info->port_id)
idx = 7; /* portA */
else
idx = 8; /* portB */
ydef[5] = (fw->spbpar[idx].ab1a << 16) |
(fw->spbpar[idx].ab0a << 8) | 1;
ydef[6] = fw->spbpar[idx].event;
port_info->stfifo |= fw->spbpar[idx].stfifo;
port_info->trdat |= fw->spbpar[idx].trdat;
}
static void siu_dai_open(struct siu_stream *siu_stream)
{
struct siu_info *info = siu_i2s_dai.private_data;
u32 __iomem *base = info->reg;
u32 srctl, ifctl;
srctl = siu_read32(base + SIU_SRCTL);
ifctl = siu_read32(base + SIU_IFCTL);
switch (info->port_id) {
case SIU_PORT_A:
/* portA operates */
srctl |= 0x200;
ifctl &= ~0xc2;
break;
case SIU_PORT_B:
/* portB operates */
srctl |= 0x100;
ifctl &= ~0x31;
break;
}
siu_write32(base + SIU_SRCTL, srctl);
/* Unmute and configure portA */
siu_write32(base + SIU_IFCTL, ifctl);
}
/*
* At the moment only fixed Left-upper, Left-lower, Right-upper, Right-lower
* packing is supported
*/
static void siu_dai_pcmdatapack(struct siu_stream *siu_stream)
{
struct siu_info *info = siu_i2s_dai.private_data;
u32 __iomem *base = info->reg;
u32 dpak;
dpak = siu_read32(base + SIU_DPAK);
switch (info->port_id) {
case SIU_PORT_A:
dpak &= ~0xc0000000;
break;
case SIU_PORT_B:
dpak &= ~0x00c00000;
break;
}
siu_write32(base + SIU_DPAK, dpak);
}
static int siu_dai_spbstart(struct siu_port *port_info)
{
struct siu_info *info = siu_i2s_dai.private_data;
u32 __iomem *base = info->reg;
struct siu_firmware *fw = &info->fw;
u32 *ydef = fw->yram0;
int cnt;
u32 __iomem *add;
u32 *ptr;
/* Load SPB Program in PRAM */
ptr = fw->pram0;
add = info->pram;
for (cnt = 0; cnt < PRAM0_SIZE; cnt++, add++, ptr++)
siu_write32(add, *ptr);
ptr = fw->pram1;
add = info->pram + (0x0100 / sizeof(u32));
for (cnt = 0; cnt < PRAM1_SIZE; cnt++, add++, ptr++)
siu_write32(add, *ptr);
/* XRAM initialization */
add = info->xram;
for (cnt = 0; cnt < XRAM0_SIZE + XRAM1_SIZE + XRAM2_SIZE; cnt++, add++)
siu_write32(add, 0);
/* YRAM variable area initialization */
add = info->yram;
for (cnt = 0; cnt < YRAM_DEF_SIZE; cnt++, add++)
siu_write32(add, ydef[cnt]);
/* YRAM FIR coefficient area initialization */
add = info->yram + (0x0200 / sizeof(u32));
for (cnt = 0; cnt < YRAM_FIR_SIZE; cnt++, add++)
siu_write32(add, fw->yram_fir_coeff[cnt]);
/* YRAM IIR coefficient area initialization */
add = info->yram + (0x0600 / sizeof(u32));
for (cnt = 0; cnt < YRAM_IIR_SIZE; cnt++, add++)
siu_write32(add, 0);
siu_write32(base + SIU_TRDAT, port_info->trdat);
port_info->trdat = 0x0;
/* SPB start condition: software */
siu_write32(base + SIU_SBACTIV, 0);
/* Start SPB */
siu_write32(base + SIU_SBCTL, 0xc0000000);
/* Wait for program to halt */
cnt = 0x10000;
while (--cnt && siu_read32(base + SIU_SBCTL) != 0x80000000)
cpu_relax();
if (!cnt)
return -EBUSY;
/* SPB program start address setting */
siu_write32(base + SIU_SBPSET, 0x00400000);
/* SPB hardware start(FIFOCTL source) */
siu_write32(base + SIU_SBACTIV, 0xc0000000);
return 0;
}
static void siu_dai_spbstop(struct siu_port *port_info)
{
struct siu_info *info = siu_i2s_dai.private_data;
u32 __iomem *base = info->reg;
siu_write32(base + SIU_SBACTIV, 0);
/* SPB stop */
siu_write32(base + SIU_SBCTL, 0);
port_info->stfifo = 0;
}
/* API functions */
/* Playback and capture hardware properties are identical */
static struct snd_pcm_hardware siu_dai_pcm_hw = {
.info = SNDRV_PCM_INFO_INTERLEAVED,
.formats = SNDRV_PCM_FMTBIT_S16,
.rates = SNDRV_PCM_RATE_8000_48000,
.rate_min = 8000,
.rate_max = 48000,
.channels_min = 2,
.channels_max = 2,
.buffer_bytes_max = SIU_BUFFER_BYTES_MAX,
.period_bytes_min = SIU_PERIOD_BYTES_MIN,
.period_bytes_max = SIU_PERIOD_BYTES_MAX,
.periods_min = SIU_PERIODS_MIN,
.periods_max = SIU_PERIODS_MAX,
};
static int siu_dai_info_volume(struct snd_kcontrol *kctrl,
struct snd_ctl_elem_info *uinfo)
{
struct siu_port *port_info = snd_kcontrol_chip(kctrl);
dev_dbg(port_info->pcm->card->dev, "%s\n", __func__);
uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
uinfo->count = 2;
uinfo->value.integer.min = 0;
uinfo->value.integer.max = SIU_MAX_VOLUME;
return 0;
}
static int siu_dai_get_volume(struct snd_kcontrol *kctrl,
struct snd_ctl_elem_value *ucontrol)
{
struct siu_port *port_info = snd_kcontrol_chip(kctrl);
struct device *dev = port_info->pcm->card->dev;
u32 vol;
dev_dbg(dev, "%s\n", __func__);
switch (kctrl->private_value) {
case VOLUME_PLAYBACK:
/* Playback is always on port 0 */
vol = port_info->playback.volume;
ucontrol->value.integer.value[0] = vol & 0xffff;
ucontrol->value.integer.value[1] = vol >> 16 & 0xffff;
break;
case VOLUME_CAPTURE:
/* Capture is always on port 1 */
vol = port_info->capture.volume;
ucontrol->value.integer.value[0] = vol & 0xffff;
ucontrol->value.integer.value[1] = vol >> 16 & 0xffff;
break;
default:
dev_err(dev, "%s() invalid private_value=%ld\n",
__func__, kctrl->private_value);
return -EINVAL;
}
return 0;
}
static int siu_dai_put_volume(struct snd_kcontrol *kctrl,
struct snd_ctl_elem_value *ucontrol)
{
struct siu_port *port_info = snd_kcontrol_chip(kctrl);
struct device *dev = port_info->pcm->card->dev;
struct siu_info *info = siu_i2s_dai.private_data;
u32 __iomem *base = info->reg;
u32 new_vol;
u32 cur_vol;
dev_dbg(dev, "%s\n", __func__);
if (ucontrol->value.integer.value[0] < 0 ||
ucontrol->value.integer.value[0] > SIU_MAX_VOLUME ||
ucontrol->value.integer.value[1] < 0 ||
ucontrol->value.integer.value[1] > SIU_MAX_VOLUME)
return -EINVAL;
new_vol = ucontrol->value.integer.value[0] |
ucontrol->value.integer.value[1] << 16;
/* See comment above - DSP firmware implementation */
switch (kctrl->private_value) {
case VOLUME_PLAYBACK:
/* Playback is always on port 0 */
cur_vol = port_info->playback.volume;
siu_write32(base + SIU_SBDVCA, new_vol);
port_info->playback.volume = new_vol;
break;
case VOLUME_CAPTURE:
/* Capture is always on port 1 */
cur_vol = port_info->capture.volume;
siu_write32(base + SIU_SBDVCB, new_vol);
port_info->capture.volume = new_vol;
break;
default:
dev_err(dev, "%s() invalid private_value=%ld\n",
__func__, kctrl->private_value);
return -EINVAL;
}
if (cur_vol != new_vol)
return 1;
return 0;
}
static struct snd_kcontrol_new playback_controls = {
.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
.name = "PCM Playback Volume",
.index = 0,
.info = siu_dai_info_volume,
.get = siu_dai_get_volume,
.put = siu_dai_put_volume,
.private_value = VOLUME_PLAYBACK,
};
static struct snd_kcontrol_new capture_controls = {
.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
.name = "PCM Capture Volume",
.index = 0,
.info = siu_dai_info_volume,
.get = siu_dai_get_volume,
.put = siu_dai_put_volume,
.private_value = VOLUME_CAPTURE,
};
int siu_init_port(int port, struct siu_port **port_info, struct snd_card *card)
{
struct device *dev = card->dev;
struct snd_kcontrol *kctrl;
int ret;
*port_info = kzalloc(sizeof(**port_info), GFP_KERNEL);
if (!*port_info)
return -ENOMEM;
dev_dbg(dev, "%s: port #%d@%p\n", __func__, port, *port_info);
(*port_info)->playback.volume = DFLT_VOLUME_LEVEL;
(*port_info)->capture.volume = DFLT_VOLUME_LEVEL;
/*
* Add mixer support. The SPB is used to change the volume. Both
* ports use the same SPB. Therefore, we only register one
* control instance since it will be used by both channels.
* In error case we continue without controls.
*/
kctrl = snd_ctl_new1(&playback_controls, *port_info);
ret = snd_ctl_add(card, kctrl);
if (ret < 0)
dev_err(dev,
"failed to add playback controls %p port=%d err=%d\n",
kctrl, port, ret);
kctrl = snd_ctl_new1(&capture_controls, *port_info);
ret = snd_ctl_add(card, kctrl);
if (ret < 0)
dev_err(dev,
"failed to add capture controls %p port=%d err=%d\n",
kctrl, port, ret);
return 0;
}
void siu_free_port(struct siu_port *port_info)
{
kfree(port_info);
}
static int siu_dai_startup(struct snd_pcm_substream *substream,
struct snd_soc_dai *dai)
{
struct siu_info *info = siu_i2s_dai.private_data;
struct snd_pcm_runtime *rt = substream->runtime;
struct siu_port *port_info = siu_port_info(substream);
int ret;
dev_dbg(substream->pcm->card->dev, "%s: port=%d@%p\n", __func__,
info->port_id, port_info);
snd_soc_set_runtime_hwparams(substream, &siu_dai_pcm_hw);
ret = snd_pcm_hw_constraint_integer(rt, SNDRV_PCM_HW_PARAM_PERIODS);
if (unlikely(ret < 0))
return ret;
siu_dai_start(port_info);
return 0;
}
static void siu_dai_shutdown(struct snd_pcm_substream *substream,
struct snd_soc_dai *dai)
{
struct siu_info *info = siu_i2s_dai.private_data;
struct siu_port *port_info = siu_port_info(substream);
dev_dbg(substream->pcm->card->dev, "%s: port=%d@%p\n", __func__,
info->port_id, port_info);
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
port_info->play_cap &= ~PLAYBACK_ENABLED;
else
port_info->play_cap &= ~CAPTURE_ENABLED;
/* Stop the siu if the other stream is not using it */
if (!port_info->play_cap) {
/* during stmread or stmwrite ? */
BUG_ON(port_info->playback.rw_flg || port_info->capture.rw_flg);
siu_dai_spbstop(port_info);
siu_dai_stop();
}
}
/* PCM part of siu_dai_playback_prepare() / siu_dai_capture_prepare() */
static int siu_dai_prepare(struct snd_pcm_substream *substream,
struct snd_soc_dai *dai)
{
struct siu_info *info = siu_i2s_dai.private_data;
struct snd_pcm_runtime *rt = substream->runtime;
struct siu_port *port_info = siu_port_info(substream);
struct siu_stream *siu_stream;
int self, ret;
dev_dbg(substream->pcm->card->dev,
"%s: port %d, active streams %lx, %d channels\n",
__func__, info->port_id, port_info->play_cap, rt->channels);
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
self = PLAYBACK_ENABLED;
siu_stream = &port_info->playback;
} else {
self = CAPTURE_ENABLED;
siu_stream = &port_info->capture;
}
/* Set up the siu if not already done */
if (!port_info->play_cap) {
siu_stream->rw_flg = 0; /* stream-data transfer flag */
siu_dai_spbAselect(port_info);
siu_dai_spbBselect(port_info);
siu_dai_open(siu_stream);
siu_dai_pcmdatapack(siu_stream);
ret = siu_dai_spbstart(port_info);
if (ret < 0)
goto fail;
}
port_info->play_cap |= self;
fail:
return ret;
}
/*
* SIU can set bus format to I2S / PCM / SPDIF independently for playback and
* capture, however, the current API sets the bus format globally for a DAI.
*/
static int siu_dai_set_fmt(struct snd_soc_dai *dai,
unsigned int fmt)
{
struct siu_info *info = siu_i2s_dai.private_data;
u32 __iomem *base = info->reg;
u32 ifctl;
dev_dbg(dai->dev, "%s: fmt 0x%x on port %d\n",
__func__, fmt, info->port_id);
if (info->port_id < 0)
return -ENODEV;
/* Here select between I2S / PCM / SPDIF */
switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
case SND_SOC_DAIFMT_I2S:
ifctl = siu_flags[info->port_id].playback.i2s |
siu_flags[info->port_id].capture.i2s;
break;
case SND_SOC_DAIFMT_LEFT_J:
ifctl = siu_flags[info->port_id].playback.pcm |
siu_flags[info->port_id].capture.pcm;
break;
/* SPDIF disabled - see comment at the top */
default:
return -EINVAL;
}
ifctl |= ~(siu_flags[info->port_id].playback.mask |
siu_flags[info->port_id].capture.mask) &
siu_read32(base + SIU_IFCTL);
siu_write32(base + SIU_IFCTL, ifctl);
return 0;
}
static int siu_dai_set_sysclk(struct snd_soc_dai *dai, int clk_id,
unsigned int freq, int dir)
{
struct clk *siu_clk, *parent_clk;
char *siu_name, *parent_name;
int ret;
if (dir != SND_SOC_CLOCK_IN)
return -EINVAL;
dev_dbg(dai->dev, "%s: using clock %d\n", __func__, clk_id);
switch (clk_id) {
case SIU_CLKA_PLL:
siu_name = "siua_clk";
parent_name = "pll_clk";
break;
case SIU_CLKA_EXT:
siu_name = "siua_clk";
parent_name = "siumcka_clk";
break;
case SIU_CLKB_PLL:
siu_name = "siub_clk";
parent_name = "pll_clk";
break;
case SIU_CLKB_EXT:
siu_name = "siub_clk";
parent_name = "siumckb_clk";
break;
default:
return -EINVAL;
}
siu_clk = clk_get(siu_i2s_dai.dev, siu_name);
if (IS_ERR(siu_clk))
return PTR_ERR(siu_clk);
parent_clk = clk_get(siu_i2s_dai.dev, parent_name);
if (!IS_ERR(parent_clk)) {
ret = clk_set_parent(siu_clk, parent_clk);
if (!ret)
clk_set_rate(siu_clk, freq);
clk_put(parent_clk);
}
clk_put(siu_clk);
return 0;
}
static struct snd_soc_dai_ops siu_dai_ops = {
.startup = siu_dai_startup,
.shutdown = siu_dai_shutdown,
.prepare = siu_dai_prepare,
.set_sysclk = siu_dai_set_sysclk,
.set_fmt = siu_dai_set_fmt,
};
struct snd_soc_dai siu_i2s_dai = {
.name = "sh-siu",
.id = 0,
.playback = {
.channels_min = 2,
.channels_max = 2,
.formats = SNDRV_PCM_FMTBIT_S16,
.rates = SNDRV_PCM_RATE_8000_48000,
},
.capture = {
.channels_min = 2,
.channels_max = 2,
.formats = SNDRV_PCM_FMTBIT_S16,
.rates = SNDRV_PCM_RATE_8000_48000,
},
.ops = &siu_dai_ops,
};
EXPORT_SYMBOL_GPL(siu_i2s_dai);
static int __devinit siu_probe(struct platform_device *pdev)
{
const struct firmware *fw_entry;
struct resource *res, *region;
struct siu_info *info;
int ret;
info = kmalloc(sizeof(*info), GFP_KERNEL);
if (!info)
return -ENOMEM;
ret = request_firmware(&fw_entry, "siu_spb.bin", &pdev->dev);
if (ret)
goto ereqfw;
/*
* Loaded firmware is "const" - read only, but we have to modify it in
* snd_siu_sh7343_spbAselect() and snd_siu_sh7343_spbBselect()
*/
memcpy(&info->fw, fw_entry->data, fw_entry->size);
release_firmware(fw_entry);
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!res) {
ret = -ENODEV;
goto egetres;
}
region = request_mem_region(res->start, resource_size(res),
pdev->name);
if (!region) {
dev_err(&pdev->dev, "SIU region already claimed\n");
ret = -EBUSY;
goto ereqmemreg;
}
ret = -ENOMEM;
info->pram = ioremap(res->start, PRAM_SIZE);
if (!info->pram)
goto emappram;
info->xram = ioremap(res->start + XRAM_OFFSET, XRAM_SIZE);
if (!info->xram)
goto emapxram;
info->yram = ioremap(res->start + YRAM_OFFSET, YRAM_SIZE);
if (!info->yram)
goto emapyram;
info->reg = ioremap(res->start + REG_OFFSET, resource_size(res) -
REG_OFFSET);
if (!info->reg)
goto emapreg;
siu_i2s_dai.dev = &pdev->dev;
siu_i2s_dai.private_data = info;
ret = snd_soc_register_dais(&siu_i2s_dai, 1);
if (ret < 0)
goto edaiinit;
ret = snd_soc_register_platform(&siu_platform);
if (ret < 0)
goto esocregp;
pm_runtime_enable(&pdev->dev);
return ret;
esocregp:
snd_soc_unregister_dais(&siu_i2s_dai, 1);
edaiinit:
iounmap(info->reg);
emapreg:
iounmap(info->yram);
emapyram:
iounmap(info->xram);
emapxram:
iounmap(info->pram);
emappram:
release_mem_region(res->start, resource_size(res));
ereqmemreg:
egetres:
ereqfw:
kfree(info);
return ret;
}
static int __devexit siu_remove(struct platform_device *pdev)
{
struct siu_info *info = siu_i2s_dai.private_data;
struct resource *res;
pm_runtime_disable(&pdev->dev);
snd_soc_unregister_platform(&siu_platform);
snd_soc_unregister_dais(&siu_i2s_dai, 1);
iounmap(info->reg);
iounmap(info->yram);
iounmap(info->xram);
iounmap(info->pram);
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (res)
release_mem_region(res->start, resource_size(res));
kfree(info);
return 0;
}
static struct platform_driver siu_driver = {
.driver = {
.name = "sh_siu",
},
.probe = siu_probe,
.remove = __devexit_p(siu_remove),
};
static int __init siu_init(void)
{
return platform_driver_register(&siu_driver);
}
static void __exit siu_exit(void)
{
platform_driver_unregister(&siu_driver);
}
module_init(siu_init)
module_exit(siu_exit)
MODULE_AUTHOR("Carlos Munoz <carlos@kenati.com>");
MODULE_DESCRIPTION("ALSA SoC SH7722 SIU driver");
MODULE_LICENSE("GPL");

616
sound/soc/sh/siu_pcm.c Normal file
View File

@ -0,0 +1,616 @@
/*
* siu_pcm.c - ALSA driver for Renesas SH7343, SH7722 SIU peripheral.
*
* Copyright (C) 2009-2010 Guennadi Liakhovetski <g.liakhovetski@gmx.de>
* Copyright (C) 2006 Carlos Munoz <carlos@kenati.com>
*
* 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., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <linux/delay.h>
#include <linux/dma-mapping.h>
#include <linux/dmaengine.h>
#include <linux/interrupt.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
#include <sound/control.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/soc-dai.h>
#include <asm/dma-sh.h>
#include <asm/siu.h>
#include "siu.h"
#define GET_MAX_PERIODS(buf_bytes, period_bytes) \
((buf_bytes) / (period_bytes))
#define PERIOD_OFFSET(buf_addr, period_num, period_bytes) \
((buf_addr) + ((period_num) * (period_bytes)))
#define RWF_STM_RD 0x01 /* Read in progress */
#define RWF_STM_WT 0x02 /* Write in progress */
struct siu_port *siu_ports[SIU_PORT_NUM];
/* transfersize is number of u32 dma transfers per period */
static int siu_pcm_stmwrite_stop(struct siu_port *port_info)
{
struct siu_info *info = siu_i2s_dai.private_data;
u32 __iomem *base = info->reg;
struct siu_stream *siu_stream = &port_info->playback;
u32 stfifo;
if (!siu_stream->rw_flg)
return -EPERM;
/* output FIFO disable */
stfifo = siu_read32(base + SIU_STFIFO);
siu_write32(base + SIU_STFIFO, stfifo & ~0x0c180c18);
pr_debug("%s: STFIFO %x -> %x\n", __func__,
stfifo, stfifo & ~0x0c180c18);
/* during stmwrite clear */
siu_stream->rw_flg = 0;
return 0;
}
static int siu_pcm_stmwrite_start(struct siu_port *port_info)
{
struct siu_stream *siu_stream = &port_info->playback;
if (siu_stream->rw_flg)
return -EPERM;
/* Current period in buffer */
port_info->playback.cur_period = 0;
/* during stmwrite flag set */
siu_stream->rw_flg = RWF_STM_WT;
/* DMA transfer start */
tasklet_schedule(&siu_stream->tasklet);
return 0;
}
static void siu_dma_tx_complete(void *arg)
{
struct siu_stream *siu_stream = arg;
if (!siu_stream->rw_flg)
return;
/* Update completed period count */
if (++siu_stream->cur_period >=
GET_MAX_PERIODS(siu_stream->buf_bytes,
siu_stream->period_bytes))
siu_stream->cur_period = 0;
pr_debug("%s: done period #%d (%u/%u bytes), cookie %d\n",
__func__, siu_stream->cur_period,
siu_stream->cur_period * siu_stream->period_bytes,
siu_stream->buf_bytes, siu_stream->cookie);
tasklet_schedule(&siu_stream->tasklet);
/* Notify alsa: a period is done */
snd_pcm_period_elapsed(siu_stream->substream);
}
static int siu_pcm_wr_set(struct siu_port *port_info,
dma_addr_t buff, u32 size)
{
struct siu_info *info = siu_i2s_dai.private_data;
u32 __iomem *base = info->reg;
struct siu_stream *siu_stream = &port_info->playback;
struct snd_pcm_substream *substream = siu_stream->substream;
struct device *dev = substream->pcm->card->dev;
struct dma_async_tx_descriptor *desc;
dma_cookie_t cookie;
struct scatterlist sg;
u32 stfifo;
sg_init_table(&sg, 1);
sg_set_page(&sg, pfn_to_page(PFN_DOWN(buff)),
size, offset_in_page(buff));
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);
if (!desc) {
dev_err(dev, "Failed to allocate a dma descriptor\n");
return -ENOMEM;
}
desc->callback = siu_dma_tx_complete;
desc->callback_param = siu_stream;
cookie = desc->tx_submit(desc);
if (cookie < 0) {
dev_err(dev, "Failed to submit a dma transfer\n");
return cookie;
}
siu_stream->tx_desc = desc;
siu_stream->cookie = cookie;
dma_async_issue_pending(siu_stream->chan);
/* only output FIFO enable */
stfifo = siu_read32(base + SIU_STFIFO);
siu_write32(base + SIU_STFIFO, stfifo | (port_info->stfifo & 0x0c180c18));
dev_dbg(dev, "%s: STFIFO %x -> %x\n", __func__,
stfifo, stfifo | (port_info->stfifo & 0x0c180c18));
return 0;
}
static int siu_pcm_rd_set(struct siu_port *port_info,
dma_addr_t buff, size_t size)
{
struct siu_info *info = siu_i2s_dai.private_data;
u32 __iomem *base = info->reg;
struct siu_stream *siu_stream = &port_info->capture;
struct snd_pcm_substream *substream = siu_stream->substream;
struct device *dev = substream->pcm->card->dev;
struct dma_async_tx_descriptor *desc;
dma_cookie_t cookie;
struct scatterlist sg;
u32 stfifo;
dev_dbg(dev, "%s: %u@%llx\n", __func__, size, (unsigned long long)buff);
sg_init_table(&sg, 1);
sg_set_page(&sg, pfn_to_page(PFN_DOWN(buff)),
size, offset_in_page(buff));
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);
if (!desc) {
dev_err(dev, "Failed to allocate dma descriptor\n");
return -ENOMEM;
}
desc->callback = siu_dma_tx_complete;
desc->callback_param = siu_stream;
cookie = desc->tx_submit(desc);
if (cookie < 0) {
dev_err(dev, "Failed to submit dma descriptor\n");
return cookie;
}
siu_stream->tx_desc = desc;
siu_stream->cookie = cookie;
dma_async_issue_pending(siu_stream->chan);
/* only input FIFO enable */
stfifo = siu_read32(base + SIU_STFIFO);
siu_write32(base + SIU_STFIFO, siu_read32(base + SIU_STFIFO) |
(port_info->stfifo & 0x13071307));
dev_dbg(dev, "%s: STFIFO %x -> %x\n", __func__,
stfifo, stfifo | (port_info->stfifo & 0x13071307));
return 0;
}
static void siu_io_tasklet(unsigned long data)
{
struct siu_stream *siu_stream = (struct siu_stream *)data;
struct snd_pcm_substream *substream = siu_stream->substream;
struct device *dev = substream->pcm->card->dev;
struct snd_pcm_runtime *rt = substream->runtime;
struct siu_port *port_info = siu_port_info(substream);
dev_dbg(dev, "%s: flags %x\n", __func__, siu_stream->rw_flg);
if (!siu_stream->rw_flg) {
dev_dbg(dev, "%s: stream inactive\n", __func__);
return;
}
if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) {
dma_addr_t buff;
size_t count;
u8 *virt;
buff = (dma_addr_t)PERIOD_OFFSET(rt->dma_addr,
siu_stream->cur_period,
siu_stream->period_bytes);
virt = PERIOD_OFFSET(rt->dma_area,
siu_stream->cur_period,
siu_stream->period_bytes);
count = siu_stream->period_bytes;
/* DMA transfer start */
siu_pcm_rd_set(port_info, buff, count);
} else {
siu_pcm_wr_set(port_info,
(dma_addr_t)PERIOD_OFFSET(rt->dma_addr,
siu_stream->cur_period,
siu_stream->period_bytes),
siu_stream->period_bytes);
}
}
/* Capture */
static int siu_pcm_stmread_start(struct siu_port *port_info)
{
struct siu_stream *siu_stream = &port_info->capture;
if (siu_stream->xfer_cnt > 0x1000000)
return -EINVAL;
if (siu_stream->rw_flg)
return -EPERM;
/* Current period in buffer */
siu_stream->cur_period = 0;
/* during stmread flag set */
siu_stream->rw_flg = RWF_STM_RD;
tasklet_schedule(&siu_stream->tasklet);
return 0;
}
static int siu_pcm_stmread_stop(struct siu_port *port_info)
{
struct siu_info *info = siu_i2s_dai.private_data;
u32 __iomem *base = info->reg;
struct siu_stream *siu_stream = &port_info->capture;
struct device *dev = siu_stream->substream->pcm->card->dev;
u32 stfifo;
if (!siu_stream->rw_flg)
return -EPERM;
/* input FIFO disable */
stfifo = siu_read32(base + SIU_STFIFO);
siu_write32(base + SIU_STFIFO, stfifo & ~0x13071307);
dev_dbg(dev, "%s: STFIFO %x -> %x\n", __func__,
stfifo, stfifo & ~0x13071307);
/* during stmread flag clear */
siu_stream->rw_flg = 0;
return 0;
}
static int siu_pcm_hw_params(struct snd_pcm_substream *ss,
struct snd_pcm_hw_params *hw_params)
{
struct siu_info *info = siu_i2s_dai.private_data;
struct device *dev = ss->pcm->card->dev;
int ret;
dev_dbg(dev, "%s: port=%d\n", __func__, info->port_id);
ret = snd_pcm_lib_malloc_pages(ss, params_buffer_bytes(hw_params));
if (ret < 0)
dev_err(dev, "snd_pcm_lib_malloc_pages() failed\n");
return ret;
}
static int siu_pcm_hw_free(struct snd_pcm_substream *ss)
{
struct siu_info *info = siu_i2s_dai.private_data;
struct siu_port *port_info = siu_port_info(ss);
struct device *dev = ss->pcm->card->dev;
struct siu_stream *siu_stream;
if (ss->stream == SNDRV_PCM_STREAM_PLAYBACK)
siu_stream = &port_info->playback;
else
siu_stream = &port_info->capture;
dev_dbg(dev, "%s: port=%d\n", __func__, info->port_id);
return snd_pcm_lib_free_pages(ss);
}
static bool filter(struct dma_chan *chan, void *slave)
{
struct sh_dmae_slave *param = slave;
pr_debug("%s: slave ID %d\n", __func__, param->slave_id);
if (unlikely(param->dma_dev != chan->device->dev))
return false;
chan->private = param;
return true;
}
static int siu_pcm_open(struct snd_pcm_substream *ss)
{
/* Playback / Capture */
struct siu_info *info = siu_i2s_dai.private_data;
struct siu_port *port_info = siu_port_info(ss);
struct siu_stream *siu_stream;
u32 port = info->port_id;
struct siu_platform *pdata = siu_i2s_dai.dev->platform_data;
struct device *dev = ss->pcm->card->dev;
dma_cap_mask_t mask;
struct sh_dmae_slave *param;
dma_cap_zero(mask);
dma_cap_set(DMA_SLAVE, mask);
dev_dbg(dev, "%s, port=%d@%p\n", __func__, port, port_info);
if (ss->stream == SNDRV_PCM_STREAM_PLAYBACK) {
siu_stream = &port_info->playback;
param = &siu_stream->param;
param->slave_id = port ? SHDMA_SLAVE_SIUB_TX :
SHDMA_SLAVE_SIUA_TX;
} else {
siu_stream = &port_info->capture;
param = &siu_stream->param;
param->slave_id = port ? SHDMA_SLAVE_SIUB_RX :
SHDMA_SLAVE_SIUA_RX;
}
param->dma_dev = pdata->dma_dev;
/* Get DMA channel */
siu_stream->chan = dma_request_channel(mask, filter, param);
if (!siu_stream->chan) {
dev_err(dev, "DMA channel allocation failed!\n");
return -EBUSY;
}
siu_stream->substream = ss;
return 0;
}
static int siu_pcm_close(struct snd_pcm_substream *ss)
{
struct siu_info *info = siu_i2s_dai.private_data;
struct device *dev = ss->pcm->card->dev;
struct siu_port *port_info = siu_port_info(ss);
struct siu_stream *siu_stream;
dev_dbg(dev, "%s: port=%d\n", __func__, info->port_id);
if (ss->stream == SNDRV_PCM_STREAM_PLAYBACK)
siu_stream = &port_info->playback;
else
siu_stream = &port_info->capture;
dma_release_channel(siu_stream->chan);
siu_stream->chan = NULL;
siu_stream->substream = NULL;
return 0;
}
static int siu_pcm_prepare(struct snd_pcm_substream *ss)
{
struct siu_info *info = siu_i2s_dai.private_data;
struct siu_port *port_info = siu_port_info(ss);
struct device *dev = ss->pcm->card->dev;
struct snd_pcm_runtime *rt = ss->runtime;
struct siu_stream *siu_stream;
snd_pcm_sframes_t xfer_cnt;
if (ss->stream == SNDRV_PCM_STREAM_PLAYBACK)
siu_stream = &port_info->playback;
else
siu_stream = &port_info->capture;
rt = siu_stream->substream->runtime;
siu_stream->buf_bytes = snd_pcm_lib_buffer_bytes(ss);
siu_stream->period_bytes = snd_pcm_lib_period_bytes(ss);
dev_dbg(dev, "%s: port=%d, %d channels, period=%u bytes\n", __func__,
info->port_id, rt->channels, siu_stream->period_bytes);
/* We only support buffers that are multiples of the period */
if (siu_stream->buf_bytes % siu_stream->period_bytes) {
dev_err(dev, "%s() - buffer=%d not multiple of period=%d\n",
__func__, siu_stream->buf_bytes,
siu_stream->period_bytes);
return -EINVAL;
}
xfer_cnt = bytes_to_frames(rt, siu_stream->period_bytes);
if (!xfer_cnt || xfer_cnt > 0x1000000)
return -EINVAL;
siu_stream->format = rt->format;
siu_stream->xfer_cnt = xfer_cnt;
dev_dbg(dev, "port=%d buf=%lx buf_bytes=%d period_bytes=%d "
"format=%d channels=%d xfer_cnt=%d\n", info->port_id,
(unsigned long)rt->dma_addr, siu_stream->buf_bytes,
siu_stream->period_bytes,
siu_stream->format, rt->channels, (int)xfer_cnt);
return 0;
}
static int siu_pcm_trigger(struct snd_pcm_substream *ss, int cmd)
{
struct siu_info *info = siu_i2s_dai.private_data;
struct device *dev = ss->pcm->card->dev;
struct siu_port *port_info = siu_port_info(ss);
int ret;
dev_dbg(dev, "%s: port=%d@%p, cmd=%d\n", __func__,
info->port_id, port_info, cmd);
switch (cmd) {
case SNDRV_PCM_TRIGGER_START:
if (ss->stream == SNDRV_PCM_STREAM_PLAYBACK)
ret = siu_pcm_stmwrite_start(port_info);
else
ret = siu_pcm_stmread_start(port_info);
if (ret < 0)
dev_warn(dev, "%s: start failed on port=%d\n",
__func__, info->port_id);
break;
case SNDRV_PCM_TRIGGER_STOP:
if (ss->stream == SNDRV_PCM_STREAM_PLAYBACK)
siu_pcm_stmwrite_stop(port_info);
else
siu_pcm_stmread_stop(port_info);
ret = 0;
break;
default:
dev_err(dev, "%s() unsupported cmd=%d\n", __func__, cmd);
ret = -EINVAL;
}
return ret;
}
/*
* So far only resolution of one period is supported, subject to extending the
* dmangine API
*/
static snd_pcm_uframes_t siu_pcm_pointer_dma(struct snd_pcm_substream *ss)
{
struct device *dev = ss->pcm->card->dev;
struct siu_info *info = siu_i2s_dai.private_data;
u32 __iomem *base = info->reg;
struct siu_port *port_info = siu_port_info(ss);
struct snd_pcm_runtime *rt = ss->runtime;
size_t ptr;
struct siu_stream *siu_stream;
if (ss->stream == SNDRV_PCM_STREAM_PLAYBACK)
siu_stream = &port_info->playback;
else
siu_stream = &port_info->capture;
/*
* ptr is the offset into the buffer where the dma is currently at. We
* check if the dma buffer has just wrapped.
*/
ptr = PERIOD_OFFSET(rt->dma_addr,
siu_stream->cur_period,
siu_stream->period_bytes) - rt->dma_addr;
dev_dbg(dev,
"%s: port=%d, events %x, FSTS %x, xferred %u/%u, cookie %d\n",
__func__, info->port_id, siu_read32(base + SIU_EVNTC),
siu_read32(base + SIU_SBFSTS), ptr, siu_stream->buf_bytes,
siu_stream->cookie);
if (ptr >= siu_stream->buf_bytes)
ptr = 0;
return bytes_to_frames(ss->runtime, ptr);
}
static int siu_pcm_new(struct snd_card *card, struct snd_soc_dai *dai,
struct snd_pcm *pcm)
{
/* card->dev == socdev->dev, see snd_soc_new_pcms() */
struct siu_info *info = siu_i2s_dai.private_data;
struct platform_device *pdev = to_platform_device(card->dev);
int ret;
int i;
/* pdev->id selects between SIUA and SIUB */
if (pdev->id < 0 || pdev->id >= SIU_PORT_NUM)
return -EINVAL;
info->port_id = pdev->id;
/*
* While the siu has 2 ports, only one port can be on at a time (only 1
* SPB). So far all the boards using the siu had only one of the ports
* wired to a codec. To simplify things, we only register one port with
* alsa. In case both ports are needed, it should be changed here
*/
for (i = pdev->id; i < pdev->id + 1; i++) {
struct siu_port **port_info = &siu_ports[i];
ret = siu_init_port(i, port_info, card);
if (ret < 0)
return ret;
ret = snd_pcm_lib_preallocate_pages_for_all(pcm,
SNDRV_DMA_TYPE_DEV, NULL,
SIU_BUFFER_BYTES_MAX, SIU_BUFFER_BYTES_MAX);
if (ret < 0) {
dev_err(card->dev,
"snd_pcm_lib_preallocate_pages_for_all() err=%d",
ret);
goto fail;
}
(*port_info)->pcm = pcm;
/* IO tasklets */
tasklet_init(&(*port_info)->playback.tasklet, siu_io_tasklet,
(unsigned long)&(*port_info)->playback);
tasklet_init(&(*port_info)->capture.tasklet, siu_io_tasklet,
(unsigned long)&(*port_info)->capture);
}
dev_info(card->dev, "SuperH SIU driver initialized.\n");
return 0;
fail:
siu_free_port(siu_ports[pdev->id]);
dev_err(card->dev, "SIU: failed to initialize.\n");
return ret;
}
static void siu_pcm_free(struct snd_pcm *pcm)
{
struct platform_device *pdev = to_platform_device(pcm->card->dev);
struct siu_port *port_info = siu_ports[pdev->id];
tasklet_kill(&port_info->capture.tasklet);
tasklet_kill(&port_info->playback.tasklet);
siu_free_port(port_info);
snd_pcm_lib_preallocate_free_for_all(pcm);
dev_dbg(pcm->card->dev, "%s\n", __func__);
}
static struct snd_pcm_ops siu_pcm_ops = {
.open = siu_pcm_open,
.close = siu_pcm_close,
.ioctl = snd_pcm_lib_ioctl,
.hw_params = siu_pcm_hw_params,
.hw_free = siu_pcm_hw_free,
.prepare = siu_pcm_prepare,
.trigger = siu_pcm_trigger,
.pointer = siu_pcm_pointer_dma,
};
struct snd_soc_platform siu_platform = {
.name = "siu-audio",
.pcm_ops = &siu_pcm_ops,
.pcm_new = siu_pcm_new,
.pcm_free = siu_pcm_free,
};
EXPORT_SYMBOL_GPL(siu_platform);