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linux/drivers/video/msm/mddi.c
Tejun Heo 5a0e3ad6af include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 
percpu.h is included by sched.h and module.h and thus ends up being
included when building most .c files.  percpu.h includes slab.h which
in turn includes gfp.h making everything defined by the two files
universally available and complicating inclusion dependencies.

percpu.h -> slab.h dependency is about to be removed.  Prepare for
this change by updating users of gfp and slab facilities include those
headers directly instead of assuming availability.  As this conversion
needs to touch large number of source files, the following script is
used as the basis of conversion.

  http://userweb.kernel.org/~tj/misc/slabh-sweep.py

The script does the followings.

* Scan files for gfp and slab usages and update includes such that
  only the necessary includes are there.  ie. if only gfp is used,
  gfp.h, if slab is used, slab.h.

* When the script inserts a new include, it looks at the include
  blocks and try to put the new include such that its order conforms
  to its surrounding.  It's put in the include block which contains
  core kernel includes, in the same order that the rest are ordered -
  alphabetical, Christmas tree, rev-Xmas-tree or at the end if there
  doesn't seem to be any matching order.

* If the script can't find a place to put a new include (mostly
  because the file doesn't have fitting include block), it prints out
  an error message indicating which .h file needs to be added to the
  file.

The conversion was done in the following steps.

1. The initial automatic conversion of all .c files updated slightly
   over 4000 files, deleting around 700 includes and adding ~480 gfp.h
   and ~3000 slab.h inclusions.  The script emitted errors for ~400
   files.

2. Each error was manually checked.  Some didn't need the inclusion,
   some needed manual addition while adding it to implementation .h or
   embedding .c file was more appropriate for others.  This step added
   inclusions to around 150 files.

3. The script was run again and the output was compared to the edits
   from #2 to make sure no file was left behind.

4. Several build tests were done and a couple of problems were fixed.
   e.g. lib/decompress_*.c used malloc/free() wrappers around slab
   APIs requiring slab.h to be added manually.

5. The script was run on all .h files but without automatically
   editing them as sprinkling gfp.h and slab.h inclusions around .h
   files could easily lead to inclusion dependency hell.  Most gfp.h
   inclusion directives were ignored as stuff from gfp.h was usually
   wildly available and often used in preprocessor macros.  Each
   slab.h inclusion directive was examined and added manually as
   necessary.

6. percpu.h was updated not to include slab.h.

7. Build test were done on the following configurations and failures
   were fixed.  CONFIG_GCOV_KERNEL was turned off for all tests (as my
   distributed build env didn't work with gcov compiles) and a few
   more options had to be turned off depending on archs to make things
   build (like ipr on powerpc/64 which failed due to missing writeq).

   * x86 and x86_64 UP and SMP allmodconfig and a custom test config.
   * powerpc and powerpc64 SMP allmodconfig
   * sparc and sparc64 SMP allmodconfig
   * ia64 SMP allmodconfig
   * s390 SMP allmodconfig
   * alpha SMP allmodconfig
   * um on x86_64 SMP allmodconfig

8. percpu.h modifications were reverted so that it could be applied as
   a separate patch and serve as bisection point.

Given the fact that I had only a couple of failures from tests on step
6, I'm fairly confident about the coverage of this conversion patch.
If there is a breakage, it's likely to be something in one of the arch
headers which should be easily discoverable easily on most builds of
the specific arch.

Signed-off-by: Tejun Heo <tj@kernel.org>
Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
2010-03-30 22:02:32 +09:00

829 lines
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/*
* MSM MDDI Transport
*
* Copyright (C) 2007 Google Incorporated
* Copyright (C) 2007 QUALCOMM Incorporated
*
* This software is licensed under the terms of the GNU General Public
* License version 2, as published by the Free Software Foundation, and
* may be copied, distributed, and modified under those terms.
*
* 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.
*
*/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/dma-mapping.h>
#include <linux/interrupt.h>
#include <linux/platform_device.h>
#include <linux/delay.h>
#include <linux/gfp.h>
#include <linux/spinlock.h>
#include <linux/clk.h>
#include <linux/io.h>
#include <linux/sched.h>
#include <mach/msm_iomap.h>
#include <mach/irqs.h>
#include <mach/board.h>
#include <mach/msm_fb.h>
#include "mddi_hw.h"
#define FLAG_DISABLE_HIBERNATION 0x0001
#define FLAG_HAVE_CAPS 0x0002
#define FLAG_HAS_VSYNC_IRQ 0x0004
#define FLAG_HAVE_STATUS 0x0008
#define CMD_GET_CLIENT_CAP 0x0601
#define CMD_GET_CLIENT_STATUS 0x0602
union mddi_rev {
unsigned char raw[MDDI_REV_BUFFER_SIZE];
struct mddi_rev_packet hdr;
struct mddi_client_status status;
struct mddi_client_caps caps;
struct mddi_register_access reg;
};
struct reg_read_info {
struct completion done;
uint32_t reg;
uint32_t status;
uint32_t result;
};
struct mddi_info {
uint16_t flags;
uint16_t version;
char __iomem *base;
int irq;
struct clk *clk;
struct msm_mddi_client_data client_data;
/* buffer for rev encap packets */
void *rev_data;
dma_addr_t rev_addr;
struct mddi_llentry *reg_write_data;
dma_addr_t reg_write_addr;
struct mddi_llentry *reg_read_data;
dma_addr_t reg_read_addr;
size_t rev_data_curr;
spinlock_t int_lock;
uint32_t int_enable;
uint32_t got_int;
wait_queue_head_t int_wait;
struct mutex reg_write_lock;
struct mutex reg_read_lock;
struct reg_read_info *reg_read;
struct mddi_client_caps caps;
struct mddi_client_status status;
void (*power_client)(struct msm_mddi_client_data *, int);
/* client device published to bind us to the
* appropriate mddi_client driver
*/
char client_name[20];
struct platform_device client_pdev;
};
static void mddi_init_rev_encap(struct mddi_info *mddi);
#define mddi_readl(r) readl(mddi->base + (MDDI_##r))
#define mddi_writel(v, r) writel((v), mddi->base + (MDDI_##r))
void mddi_activate_link(struct msm_mddi_client_data *cdata)
{
struct mddi_info *mddi = container_of(cdata, struct mddi_info,
client_data);
mddi_writel(MDDI_CMD_LINK_ACTIVE, CMD);
}
static void mddi_handle_link_list_done(struct mddi_info *mddi)
{
}
static void mddi_reset_rev_encap_ptr(struct mddi_info *mddi)
{
printk(KERN_INFO "mddi: resetting rev ptr\n");
mddi->rev_data_curr = 0;
mddi_writel(mddi->rev_addr, REV_PTR);
mddi_writel(mddi->rev_addr, REV_PTR);
mddi_writel(MDDI_CMD_FORCE_NEW_REV_PTR, CMD);
}
static void mddi_handle_rev_data(struct mddi_info *mddi, union mddi_rev *rev)
{
int i;
struct reg_read_info *ri;
if ((rev->hdr.length <= MDDI_REV_BUFFER_SIZE - 2) &&
(rev->hdr.length >= sizeof(struct mddi_rev_packet) - 2)) {
switch (rev->hdr.type) {
case TYPE_CLIENT_CAPS:
memcpy(&mddi->caps, &rev->caps,
sizeof(struct mddi_client_caps));
mddi->flags |= FLAG_HAVE_CAPS;
wake_up(&mddi->int_wait);
break;
case TYPE_CLIENT_STATUS:
memcpy(&mddi->status, &rev->status,
sizeof(struct mddi_client_status));
mddi->flags |= FLAG_HAVE_STATUS;
wake_up(&mddi->int_wait);
break;
case TYPE_REGISTER_ACCESS:
ri = mddi->reg_read;
if (ri == 0) {
printk(KERN_INFO "rev: got reg %x = %x without "
" pending read\n",
rev->reg.register_address,
rev->reg.register_data_list);
break;
}
if (ri->reg != rev->reg.register_address) {
printk(KERN_INFO "rev: got reg %x = %x for "
"wrong register, expected "
"%x\n",
rev->reg.register_address,
rev->reg.register_data_list, ri->reg);
break;
}
mddi->reg_read = NULL;
ri->status = 0;
ri->result = rev->reg.register_data_list;
complete(&ri->done);
break;
default:
printk(KERN_INFO "rev: unknown reverse packet: "
"len=%04x type=%04x CURR_REV_PTR=%x\n",
rev->hdr.length, rev->hdr.type,
mddi_readl(CURR_REV_PTR));
for (i = 0; i < rev->hdr.length + 2; i++) {
if ((i % 16) == 0)
printk(KERN_INFO "\n");
printk(KERN_INFO " %02x", rev->raw[i]);
}
printk(KERN_INFO "\n");
mddi_reset_rev_encap_ptr(mddi);
}
} else {
printk(KERN_INFO "bad rev length, %d, CURR_REV_PTR %x\n",
rev->hdr.length, mddi_readl(CURR_REV_PTR));
mddi_reset_rev_encap_ptr(mddi);
}
}
static void mddi_wait_interrupt(struct mddi_info *mddi, uint32_t intmask);
static void mddi_handle_rev_data_avail(struct mddi_info *mddi)
{
union mddi_rev *rev = mddi->rev_data;
uint32_t rev_data_count;
uint32_t rev_crc_err_count;
int i;
struct reg_read_info *ri;
size_t prev_offset;
uint16_t length;
union mddi_rev *crev = mddi->rev_data + mddi->rev_data_curr;
/* clear the interrupt */
mddi_writel(MDDI_INT_REV_DATA_AVAIL, INT);
rev_data_count = mddi_readl(REV_PKT_CNT);
rev_crc_err_count = mddi_readl(REV_CRC_ERR);
if (rev_data_count > 1)
printk(KERN_INFO "rev_data_count %d\n", rev_data_count);
if (rev_crc_err_count) {
printk(KERN_INFO "rev_crc_err_count %d, INT %x\n",
rev_crc_err_count, mddi_readl(INT));
ri = mddi->reg_read;
if (ri == 0) {
printk(KERN_INFO "rev: got crc error without pending "
"read\n");
} else {
mddi->reg_read = NULL;
ri->status = -EIO;
ri->result = -1;
complete(&ri->done);
}
}
if (rev_data_count == 0)
return;
prev_offset = mddi->rev_data_curr;
length = *((uint8_t *)mddi->rev_data + mddi->rev_data_curr);
mddi->rev_data_curr++;
if (mddi->rev_data_curr == MDDI_REV_BUFFER_SIZE)
mddi->rev_data_curr = 0;
length += *((uint8_t *)mddi->rev_data + mddi->rev_data_curr) << 8;
mddi->rev_data_curr += 1 + length;
if (mddi->rev_data_curr >= MDDI_REV_BUFFER_SIZE)
mddi->rev_data_curr =
mddi->rev_data_curr % MDDI_REV_BUFFER_SIZE;
if (length > MDDI_REV_BUFFER_SIZE - 2) {
printk(KERN_INFO "mddi: rev data length greater than buffer"
"size\n");
mddi_reset_rev_encap_ptr(mddi);
return;
}
if (prev_offset + 2 + length >= MDDI_REV_BUFFER_SIZE) {
union mddi_rev tmprev;
size_t rem = MDDI_REV_BUFFER_SIZE - prev_offset;
memcpy(&tmprev.raw[0], mddi->rev_data + prev_offset, rem);
memcpy(&tmprev.raw[rem], mddi->rev_data, 2 + length - rem);
mddi_handle_rev_data(mddi, &tmprev);
} else {
mddi_handle_rev_data(mddi, crev);
}
if (prev_offset < MDDI_REV_BUFFER_SIZE / 2 &&
mddi->rev_data_curr >= MDDI_REV_BUFFER_SIZE / 2) {
mddi_writel(mddi->rev_addr, REV_PTR);
}
}
static irqreturn_t mddi_isr(int irq, void *data)
{
struct msm_mddi_client_data *cdata = data;
struct mddi_info *mddi = container_of(cdata, struct mddi_info,
client_data);
uint32_t active, status;
spin_lock(&mddi->int_lock);
active = mddi_readl(INT);
status = mddi_readl(STAT);
mddi_writel(active, INT);
/* ignore any interrupts we have disabled */
active &= mddi->int_enable;
mddi->got_int |= active;
wake_up(&mddi->int_wait);
if (active & MDDI_INT_PRI_LINK_LIST_DONE) {
mddi->int_enable &= (~MDDI_INT_PRI_LINK_LIST_DONE);
mddi_handle_link_list_done(mddi);
}
if (active & MDDI_INT_REV_DATA_AVAIL)
mddi_handle_rev_data_avail(mddi);
if (active & ~MDDI_INT_NEED_CLEAR)
mddi->int_enable &= ~(active & ~MDDI_INT_NEED_CLEAR);
if (active & MDDI_INT_LINK_ACTIVE) {
mddi->int_enable &= (~MDDI_INT_LINK_ACTIVE);
mddi->int_enable |= MDDI_INT_IN_HIBERNATION;
}
if (active & MDDI_INT_IN_HIBERNATION) {
mddi->int_enable &= (~MDDI_INT_IN_HIBERNATION);
mddi->int_enable |= MDDI_INT_LINK_ACTIVE;
}
mddi_writel(mddi->int_enable, INTEN);
spin_unlock(&mddi->int_lock);
return IRQ_HANDLED;
}
static long mddi_wait_interrupt_timeout(struct mddi_info *mddi,
uint32_t intmask, int timeout)
{
unsigned long irq_flags;
spin_lock_irqsave(&mddi->int_lock, irq_flags);
mddi->got_int &= ~intmask;
mddi->int_enable |= intmask;
mddi_writel(mddi->int_enable, INTEN);
spin_unlock_irqrestore(&mddi->int_lock, irq_flags);
return wait_event_timeout(mddi->int_wait, mddi->got_int & intmask,
timeout);
}
static void mddi_wait_interrupt(struct mddi_info *mddi, uint32_t intmask)
{
if (mddi_wait_interrupt_timeout(mddi, intmask, HZ/10) == 0)
printk(KERN_INFO KERN_ERR "mddi_wait_interrupt %d, timeout "
"waiting for %x, INT = %x, STAT = %x gotint = %x\n",
current->pid, intmask, mddi_readl(INT), mddi_readl(STAT),
mddi->got_int);
}
static void mddi_init_rev_encap(struct mddi_info *mddi)
{
memset(mddi->rev_data, 0xee, MDDI_REV_BUFFER_SIZE);
mddi_writel(mddi->rev_addr, REV_PTR);
mddi_writel(MDDI_CMD_FORCE_NEW_REV_PTR, CMD);
mddi_wait_interrupt(mddi, MDDI_INT_NO_CMD_PKTS_PEND);
}
void mddi_set_auto_hibernate(struct msm_mddi_client_data *cdata, int on)
{
struct mddi_info *mddi = container_of(cdata, struct mddi_info,
client_data);
mddi_writel(MDDI_CMD_POWERDOWN, CMD);
mddi_wait_interrupt(mddi, MDDI_INT_IN_HIBERNATION);
mddi_writel(MDDI_CMD_HIBERNATE | !!on, CMD);
mddi_wait_interrupt(mddi, MDDI_INT_NO_CMD_PKTS_PEND);
}
static uint16_t mddi_init_registers(struct mddi_info *mddi)
{
mddi_writel(0x0001, VERSION);
mddi_writel(MDDI_HOST_BYTES_PER_SUBFRAME, BPS);
mddi_writel(0x0003, SPM); /* subframes per media */
mddi_writel(0x0005, TA1_LEN);
mddi_writel(MDDI_HOST_TA2_LEN, TA2_LEN);
mddi_writel(0x0096, DRIVE_HI);
/* 0x32 normal, 0x50 for Toshiba display */
mddi_writel(0x0050, DRIVE_LO);
mddi_writel(0x003C, DISP_WAKE); /* wakeup counter */
mddi_writel(MDDI_HOST_REV_RATE_DIV, REV_RATE_DIV);
mddi_writel(MDDI_REV_BUFFER_SIZE, REV_SIZE);
mddi_writel(MDDI_MAX_REV_PKT_SIZE, REV_ENCAP_SZ);
/* disable periodic rev encap */
mddi_writel(MDDI_CMD_PERIODIC_REV_ENCAP, CMD);
mddi_wait_interrupt(mddi, MDDI_INT_NO_CMD_PKTS_PEND);
if (mddi_readl(PAD_CTL) == 0) {
/* If we are turning on band gap, need to wait 5us before
* turning on the rest of the PAD */
mddi_writel(0x08000, PAD_CTL);
udelay(5);
}
/* Recommendation from PAD hw team */
mddi_writel(0xa850f, PAD_CTL);
/* Need an even number for counts */
mddi_writel(0x60006, DRIVER_START_CNT);
mddi_set_auto_hibernate(&mddi->client_data, 0);
mddi_writel(MDDI_CMD_DISP_IGNORE, CMD);
mddi_wait_interrupt(mddi, MDDI_INT_NO_CMD_PKTS_PEND);
mddi_init_rev_encap(mddi);
return mddi_readl(CORE_VER) & 0xffff;
}
static void mddi_suspend(struct msm_mddi_client_data *cdata)
{
struct mddi_info *mddi = container_of(cdata, struct mddi_info,
client_data);
/* turn off the client */
if (mddi->power_client)
mddi->power_client(&mddi->client_data, 0);
/* turn off the link */
mddi_writel(MDDI_CMD_RESET, CMD);
mddi_wait_interrupt(mddi, MDDI_INT_NO_CMD_PKTS_PEND);
/* turn off the clock */
clk_disable(mddi->clk);
}
static void mddi_resume(struct msm_mddi_client_data *cdata)
{
struct mddi_info *mddi = container_of(cdata, struct mddi_info,
client_data);
mddi_set_auto_hibernate(&mddi->client_data, 0);
/* turn on the client */
if (mddi->power_client)
mddi->power_client(&mddi->client_data, 1);
/* turn on the clock */
clk_enable(mddi->clk);
/* set up the local registers */
mddi->rev_data_curr = 0;
mddi_init_registers(mddi);
mddi_writel(mddi->int_enable, INTEN);
mddi_writel(MDDI_CMD_LINK_ACTIVE, CMD);
mddi_writel(MDDI_CMD_SEND_RTD, CMD);
mddi_wait_interrupt(mddi, MDDI_INT_NO_CMD_PKTS_PEND);
mddi_set_auto_hibernate(&mddi->client_data, 1);
}
static int __init mddi_get_client_caps(struct mddi_info *mddi)
{
int i, j;
/* clear any stale interrupts */
mddi_writel(0xffffffff, INT);
mddi->int_enable = MDDI_INT_LINK_ACTIVE |
MDDI_INT_IN_HIBERNATION |
MDDI_INT_PRI_LINK_LIST_DONE |
MDDI_INT_REV_DATA_AVAIL |
MDDI_INT_REV_OVERFLOW |
MDDI_INT_REV_OVERWRITE |
MDDI_INT_RTD_FAILURE;
mddi_writel(mddi->int_enable, INTEN);
mddi_writel(MDDI_CMD_LINK_ACTIVE, CMD);
mddi_wait_interrupt(mddi, MDDI_INT_NO_CMD_PKTS_PEND);
for (j = 0; j < 3; j++) {
/* the toshiba vga panel does not respond to get
* caps unless you SEND_RTD, but the first SEND_RTD
* will fail...
*/
for (i = 0; i < 4; i++) {
uint32_t stat;
mddi_writel(MDDI_CMD_SEND_RTD, CMD);
mddi_wait_interrupt(mddi, MDDI_INT_NO_CMD_PKTS_PEND);
stat = mddi_readl(STAT);
printk(KERN_INFO "mddi cmd send rtd: int %x, stat %x, "
"rtd val %x\n", mddi_readl(INT), stat,
mddi_readl(RTD_VAL));
if ((stat & MDDI_STAT_RTD_MEAS_FAIL) == 0)
break;
msleep(1);
}
mddi_writel(CMD_GET_CLIENT_CAP, CMD);
mddi_wait_interrupt(mddi, MDDI_INT_NO_CMD_PKTS_PEND);
wait_event_timeout(mddi->int_wait, mddi->flags & FLAG_HAVE_CAPS,
HZ / 100);
if (mddi->flags & FLAG_HAVE_CAPS)
break;
printk(KERN_INFO KERN_ERR "mddi_init, timeout waiting for "
"caps\n");
}
return mddi->flags & FLAG_HAVE_CAPS;
}
/* link must be active when this is called */
int mddi_check_status(struct mddi_info *mddi)
{
int ret = -1, retry = 3;
mutex_lock(&mddi->reg_read_lock);
mddi_writel(MDDI_CMD_PERIODIC_REV_ENCAP | 1, CMD);
mddi_wait_interrupt(mddi, MDDI_INT_NO_CMD_PKTS_PEND);
do {
mddi->flags &= ~FLAG_HAVE_STATUS;
mddi_writel(CMD_GET_CLIENT_STATUS, CMD);
mddi_wait_interrupt(mddi, MDDI_INT_NO_CMD_PKTS_PEND);
wait_event_timeout(mddi->int_wait,
mddi->flags & FLAG_HAVE_STATUS,
HZ / 100);
if (mddi->flags & FLAG_HAVE_STATUS) {
if (mddi->status.crc_error_count)
printk(KERN_INFO "mddi status: crc_error "
"count: %d\n",
mddi->status.crc_error_count);
else
ret = 0;
break;
} else
printk(KERN_INFO "mddi status: failed to get client "
"status\n");
mddi_writel(MDDI_CMD_SEND_RTD, CMD);
mddi_wait_interrupt(mddi, MDDI_INT_NO_CMD_PKTS_PEND);
} while (--retry);
mddi_writel(MDDI_CMD_PERIODIC_REV_ENCAP | 0, CMD);
mddi_wait_interrupt(mddi, MDDI_INT_NO_CMD_PKTS_PEND);
mutex_unlock(&mddi->reg_read_lock);
return ret;
}
void mddi_remote_write(struct msm_mddi_client_data *cdata, uint32_t val,
uint32_t reg)
{
struct mddi_info *mddi = container_of(cdata, struct mddi_info,
client_data);
struct mddi_llentry *ll;
struct mddi_register_access *ra;
mutex_lock(&mddi->reg_write_lock);
ll = mddi->reg_write_data;
ra = &(ll->u.r);
ra->length = 14 + 4;
ra->type = TYPE_REGISTER_ACCESS;
ra->client_id = 0;
ra->read_write_info = MDDI_WRITE | 1;
ra->crc16 = 0;
ra->register_address = reg;
ra->register_data_list = val;
ll->flags = 1;
ll->header_count = 14;
ll->data_count = 4;
ll->data = mddi->reg_write_addr + offsetof(struct mddi_llentry,
u.r.register_data_list);
ll->next = 0;
ll->reserved = 0;
mddi_writel(mddi->reg_write_addr, PRI_PTR);
mddi_wait_interrupt(mddi, MDDI_INT_PRI_LINK_LIST_DONE);
mutex_unlock(&mddi->reg_write_lock);
}
uint32_t mddi_remote_read(struct msm_mddi_client_data *cdata, uint32_t reg)
{
struct mddi_info *mddi = container_of(cdata, struct mddi_info,
client_data);
struct mddi_llentry *ll;
struct mddi_register_access *ra;
struct reg_read_info ri;
unsigned s;
int retry_count = 2;
unsigned long irq_flags;
mutex_lock(&mddi->reg_read_lock);
ll = mddi->reg_read_data;
ra = &(ll->u.r);
ra->length = 14;
ra->type = TYPE_REGISTER_ACCESS;
ra->client_id = 0;
ra->read_write_info = MDDI_READ | 1;
ra->crc16 = 0;
ra->register_address = reg;
ll->flags = 0x11;
ll->header_count = 14;
ll->data_count = 0;
ll->data = 0;
ll->next = 0;
ll->reserved = 0;
s = mddi_readl(STAT);
ri.reg = reg;
ri.status = -1;
do {
init_completion(&ri.done);
mddi->reg_read = &ri;
mddi_writel(mddi->reg_read_addr, PRI_PTR);
mddi_wait_interrupt(mddi, MDDI_INT_PRI_LINK_LIST_DONE);
/* Enable Periodic Reverse Encapsulation. */
mddi_writel(MDDI_CMD_PERIODIC_REV_ENCAP | 1, CMD);
mddi_wait_interrupt(mddi, MDDI_INT_NO_CMD_PKTS_PEND);
if (wait_for_completion_timeout(&ri.done, HZ/10) == 0 &&
!ri.done.done) {
printk(KERN_INFO "mddi_remote_read(%x) timeout "
"(%d %d %d)\n",
reg, ri.status, ri.result, ri.done.done);
spin_lock_irqsave(&mddi->int_lock, irq_flags);
mddi->reg_read = NULL;
spin_unlock_irqrestore(&mddi->int_lock, irq_flags);
ri.status = -1;
ri.result = -1;
}
if (ri.status == 0)
break;
mddi_writel(MDDI_CMD_SEND_RTD, CMD);
mddi_writel(MDDI_CMD_LINK_ACTIVE, CMD);
mddi_wait_interrupt(mddi, MDDI_INT_NO_CMD_PKTS_PEND);
printk(KERN_INFO "mddi_remote_read: failed, sent "
"MDDI_CMD_SEND_RTD: int %x, stat %x, rtd val %x "
"curr_rev_ptr %x\n", mddi_readl(INT), mddi_readl(STAT),
mddi_readl(RTD_VAL), mddi_readl(CURR_REV_PTR));
} while (retry_count-- > 0);
/* Disable Periodic Reverse Encapsulation. */
mddi_writel(MDDI_CMD_PERIODIC_REV_ENCAP | 0, CMD);
mddi_wait_interrupt(mddi, MDDI_INT_NO_CMD_PKTS_PEND);
mddi->reg_read = NULL;
mutex_unlock(&mddi->reg_read_lock);
return ri.result;
}
static struct mddi_info mddi_info[2];
static int __init mddi_clk_setup(struct platform_device *pdev,
struct mddi_info *mddi,
unsigned long clk_rate)
{
int ret;
/* set up the clocks */
mddi->clk = clk_get(&pdev->dev, "mddi_clk");
if (IS_ERR(mddi->clk)) {
printk(KERN_INFO "mddi: failed to get clock\n");
return PTR_ERR(mddi->clk);
}
ret = clk_enable(mddi->clk);
if (ret)
goto fail;
ret = clk_set_rate(mddi->clk, clk_rate);
if (ret)
goto fail;
return 0;
fail:
clk_put(mddi->clk);
return ret;
}
static int __init mddi_rev_data_setup(struct mddi_info *mddi)
{
void *dma;
dma_addr_t dma_addr;
/* set up dma buffer */
dma = dma_alloc_coherent(NULL, 0x1000, &dma_addr, GFP_KERNEL);
if (dma == 0)
return -ENOMEM;
mddi->rev_data = dma;
mddi->rev_data_curr = 0;
mddi->rev_addr = dma_addr;
mddi->reg_write_data = dma + MDDI_REV_BUFFER_SIZE;
mddi->reg_write_addr = dma_addr + MDDI_REV_BUFFER_SIZE;
mddi->reg_read_data = mddi->reg_write_data + 1;
mddi->reg_read_addr = mddi->reg_write_addr +
sizeof(*mddi->reg_write_data);
return 0;
}
static int __init mddi_probe(struct platform_device *pdev)
{
struct msm_mddi_platform_data *pdata = pdev->dev.platform_data;
struct mddi_info *mddi = &mddi_info[pdev->id];
struct resource *resource;
int ret, i;
resource = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!resource) {
printk(KERN_ERR "mddi: no associated mem resource!\n");
return -ENOMEM;
}
mddi->base = ioremap(resource->start, resource->end - resource->start);
if (!mddi->base) {
printk(KERN_ERR "mddi: failed to remap base!\n");
ret = -EINVAL;
goto error_ioremap;
}
resource = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
if (!resource) {
printk(KERN_ERR "mddi: no associated irq resource!\n");
ret = -EINVAL;
goto error_get_irq_resource;
}
mddi->irq = resource->start;
printk(KERN_INFO "mddi: init() base=0x%p irq=%d\n", mddi->base,
mddi->irq);
mddi->power_client = pdata->power_client;
mutex_init(&mddi->reg_write_lock);
mutex_init(&mddi->reg_read_lock);
spin_lock_init(&mddi->int_lock);
init_waitqueue_head(&mddi->int_wait);
ret = mddi_clk_setup(pdev, mddi, pdata->clk_rate);
if (ret) {
printk(KERN_ERR "mddi: failed to setup clock!\n");
goto error_clk_setup;
}
ret = mddi_rev_data_setup(mddi);
if (ret) {
printk(KERN_ERR "mddi: failed to setup rev data!\n");
goto error_rev_data;
}
mddi->int_enable = 0;
mddi_writel(mddi->int_enable, INTEN);
ret = request_irq(mddi->irq, mddi_isr, IRQF_DISABLED, "mddi",
&mddi->client_data);
if (ret) {
printk(KERN_ERR "mddi: failed to request enable irq!\n");
goto error_request_irq;
}
/* turn on the mddi client bridge chip */
if (mddi->power_client)
mddi->power_client(&mddi->client_data, 1);
/* initialize the mddi registers */
mddi_set_auto_hibernate(&mddi->client_data, 0);
mddi_writel(MDDI_CMD_RESET, CMD);
mddi_wait_interrupt(mddi, MDDI_INT_NO_CMD_PKTS_PEND);
mddi->version = mddi_init_registers(mddi);
if (mddi->version < 0x20) {
printk(KERN_ERR "mddi: unsupported version 0x%x\n",
mddi->version);
ret = -ENODEV;
goto error_mddi_version;
}
/* read the capabilities off the client */
if (!mddi_get_client_caps(mddi)) {
printk(KERN_INFO "mddi: no client found\n");
/* power down the panel */
mddi_writel(MDDI_CMD_POWERDOWN, CMD);
printk(KERN_INFO "mddi powerdown: stat %x\n", mddi_readl(STAT));
msleep(100);
printk(KERN_INFO "mddi powerdown: stat %x\n", mddi_readl(STAT));
return 0;
}
mddi_set_auto_hibernate(&mddi->client_data, 1);
if (mddi->caps.Mfr_Name == 0 && mddi->caps.Product_Code == 0)
pdata->fixup(&mddi->caps.Mfr_Name, &mddi->caps.Product_Code);
mddi->client_pdev.id = 0;
for (i = 0; i < pdata->num_clients; i++) {
if (pdata->client_platform_data[i].product_id ==
(mddi->caps.Mfr_Name << 16 | mddi->caps.Product_Code)) {
mddi->client_data.private_client_data =
pdata->client_platform_data[i].client_data;
mddi->client_pdev.name =
pdata->client_platform_data[i].name;
mddi->client_pdev.id =
pdata->client_platform_data[i].id;
/* XXX: possibly set clock */
break;
}
}
if (i >= pdata->num_clients)
mddi->client_pdev.name = "mddi_c_dummy";
printk(KERN_INFO "mddi: registering panel %s\n",
mddi->client_pdev.name);
mddi->client_data.suspend = mddi_suspend;
mddi->client_data.resume = mddi_resume;
mddi->client_data.activate_link = mddi_activate_link;
mddi->client_data.remote_write = mddi_remote_write;
mddi->client_data.remote_read = mddi_remote_read;
mddi->client_data.auto_hibernate = mddi_set_auto_hibernate;
mddi->client_data.fb_resource = pdata->fb_resource;
if (pdev->id == 0)
mddi->client_data.interface_type = MSM_MDDI_PMDH_INTERFACE;
else if (pdev->id == 1)
mddi->client_data.interface_type = MSM_MDDI_EMDH_INTERFACE;
else {
printk(KERN_ERR "mddi: can not determine interface %d!\n",
pdev->id);
ret = -EINVAL;
goto error_mddi_interface;
}
mddi->client_pdev.dev.platform_data = &mddi->client_data;
printk(KERN_INFO "mddi: publish: %s\n", mddi->client_name);
platform_device_register(&mddi->client_pdev);
return 0;
error_mddi_interface:
error_mddi_version:
free_irq(mddi->irq, 0);
error_request_irq:
dma_free_coherent(NULL, 0x1000, mddi->rev_data, mddi->rev_addr);
error_rev_data:
error_clk_setup:
error_get_irq_resource:
iounmap(mddi->base);
error_ioremap:
printk(KERN_INFO "mddi: mddi_init() failed (%d)\n", ret);
return ret;
}
static struct platform_driver mddi_driver = {
.probe = mddi_probe,
.driver = { .name = "msm_mddi" },
};
static int __init _mddi_init(void)
{
return platform_driver_register(&mddi_driver);
}
module_init(_mddi_init);
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