linux/drivers/video/msm/mddi_client_toshiba.c

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/* drivers/video/msm_fb/mddi_client_toshiba.c
*
* Support for Toshiba TC358720XBG mddi client devices which require no
* special initialization code.
*
* Copyright (C) 2007 Google 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/platform_device.h>
#include <linux/interrupt.h>
#include <linux/gpio.h>
#include <linux/sched.h>
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>
2010-03-24 08:04:11 +00:00
#include <linux/slab.h>
#include <mach/msm_fb.h>
#define LCD_CONTROL_BLOCK_BASE 0x110000
#define CMN (LCD_CONTROL_BLOCK_BASE|0x10)
#define INTFLG (LCD_CONTROL_BLOCK_BASE|0x18)
#define HCYCLE (LCD_CONTROL_BLOCK_BASE|0x34)
#define HDE_START (LCD_CONTROL_BLOCK_BASE|0x3C)
#define VPOS (LCD_CONTROL_BLOCK_BASE|0xC0)
#define MPLFBUF (LCD_CONTROL_BLOCK_BASE|0x20)
#define WAKEUP (LCD_CONTROL_BLOCK_BASE|0x54)
#define WSYN_DLY (LCD_CONTROL_BLOCK_BASE|0x58)
#define REGENB (LCD_CONTROL_BLOCK_BASE|0x5C)
#define BASE5 0x150000
#define BASE6 0x160000
#define BASE7 0x170000
#define GPIOIEV (BASE5 + 0x10)
#define GPIOIE (BASE5 + 0x14)
#define GPIORIS (BASE5 + 0x18)
#define GPIOMIS (BASE5 + 0x1C)
#define GPIOIC (BASE5 + 0x20)
#define INTMASK (BASE6 + 0x0C)
#define INTMASK_VWAKEOUT (1U << 0)
#define INTMASK_VWAKEOUT_ACTIVE_LOW (1U << 8)
#define GPIOSEL (BASE7 + 0x00)
#define GPIOSEL_VWAKEINT (1U << 0)
static DECLARE_WAIT_QUEUE_HEAD(toshiba_vsync_wait);
struct panel_info {
struct msm_mddi_client_data *client_data;
struct platform_device pdev;
struct msm_panel_data panel_data;
struct msmfb_callback *toshiba_callback;
int toshiba_got_int;
};
static void toshiba_request_vsync(struct msm_panel_data *panel_data,
struct msmfb_callback *callback)
{
struct panel_info *panel = container_of(panel_data, struct panel_info,
panel_data);
struct msm_mddi_client_data *client_data = panel->client_data;
panel->toshiba_callback = callback;
if (panel->toshiba_got_int) {
panel->toshiba_got_int = 0;
client_data->activate_link(client_data);
}
}
static void toshiba_clear_vsync(struct msm_panel_data *panel_data)
{
struct panel_info *panel = container_of(panel_data, struct panel_info,
panel_data);
struct msm_mddi_client_data *client_data = panel->client_data;
client_data->activate_link(client_data);
}
static void toshiba_wait_vsync(struct msm_panel_data *panel_data)
{
struct panel_info *panel = container_of(panel_data, struct panel_info,
panel_data);
struct msm_mddi_client_data *client_data = panel->client_data;
if (panel->toshiba_got_int) {
panel->toshiba_got_int = 0;
client_data->activate_link(client_data); /* clears interrupt */
}
if (wait_event_timeout(toshiba_vsync_wait, panel->toshiba_got_int,
HZ/2) == 0)
printk(KERN_ERR "timeout waiting for VSYNC\n");
panel->toshiba_got_int = 0;
/* interrupt clears when screen dma starts */
}
static int toshiba_suspend(struct msm_panel_data *panel_data)
{
struct panel_info *panel = container_of(panel_data, struct panel_info,
panel_data);
struct msm_mddi_client_data *client_data = panel->client_data;
struct msm_mddi_bridge_platform_data *bridge_data =
client_data->private_client_data;
int ret;
ret = bridge_data->uninit(bridge_data, client_data);
if (ret) {
printk(KERN_INFO "mddi toshiba client: non zero return from "
"uninit\n");
return ret;
}
client_data->suspend(client_data);
return 0;
}
static int toshiba_resume(struct msm_panel_data *panel_data)
{
struct panel_info *panel = container_of(panel_data, struct panel_info,
panel_data);
struct msm_mddi_client_data *client_data = panel->client_data;
struct msm_mddi_bridge_platform_data *bridge_data =
client_data->private_client_data;
int ret;
client_data->resume(client_data);
ret = bridge_data->init(bridge_data, client_data);
if (ret)
return ret;
return 0;
}
static int toshiba_blank(struct msm_panel_data *panel_data)
{
struct panel_info *panel = container_of(panel_data, struct panel_info,
panel_data);
struct msm_mddi_client_data *client_data = panel->client_data;
struct msm_mddi_bridge_platform_data *bridge_data =
client_data->private_client_data;
return bridge_data->blank(bridge_data, client_data);
}
static int toshiba_unblank(struct msm_panel_data *panel_data)
{
struct panel_info *panel = container_of(panel_data, struct panel_info,
panel_data);
struct msm_mddi_client_data *client_data = panel->client_data;
struct msm_mddi_bridge_platform_data *bridge_data =
client_data->private_client_data;
return bridge_data->unblank(bridge_data, client_data);
}
irqreturn_t toshiba_vsync_interrupt(int irq, void *data)
{
struct panel_info *panel = data;
panel->toshiba_got_int = 1;
if (panel->toshiba_callback) {
panel->toshiba_callback->func(panel->toshiba_callback);
panel->toshiba_callback = 0;
}
wake_up(&toshiba_vsync_wait);
return IRQ_HANDLED;
}
static int setup_vsync(struct panel_info *panel,
int init)
{
int ret;
int gpio = 97;
unsigned int irq;
if (!init) {
ret = 0;
goto uninit;
}
ret = gpio_request(gpio, "vsync");
if (ret)
goto err_request_gpio_failed;
ret = gpio_direction_input(gpio);
if (ret)
goto err_gpio_direction_input_failed;
ret = irq = gpio_to_irq(gpio);
if (ret < 0)
goto err_get_irq_num_failed;
ret = request_irq(irq, toshiba_vsync_interrupt, IRQF_TRIGGER_RISING,
"vsync", panel);
if (ret)
goto err_request_irq_failed;
printk(KERN_INFO "vsync on gpio %d now %d\n",
gpio, gpio_get_value(gpio));
return 0;
uninit:
free_irq(gpio_to_irq(gpio), panel);
err_request_irq_failed:
err_get_irq_num_failed:
err_gpio_direction_input_failed:
gpio_free(gpio);
err_request_gpio_failed:
return ret;
}
static int mddi_toshiba_probe(struct platform_device *pdev)
{
int ret;
struct msm_mddi_client_data *client_data = pdev->dev.platform_data;
struct msm_mddi_bridge_platform_data *bridge_data =
client_data->private_client_data;
struct panel_info *panel =
kzalloc(sizeof(struct panel_info), GFP_KERNEL);
if (!panel)
return -ENOMEM;
platform_set_drvdata(pdev, panel);
/* mddi_remote_write(mddi, 0, WAKEUP); */
client_data->remote_write(client_data, GPIOSEL_VWAKEINT, GPIOSEL);
client_data->remote_write(client_data, INTMASK_VWAKEOUT, INTMASK);
ret = setup_vsync(panel, 1);
if (ret) {
dev_err(&pdev->dev, "mddi_bridge_setup_vsync failed\n");
return ret;
}
panel->client_data = client_data;
panel->panel_data.suspend = toshiba_suspend;
panel->panel_data.resume = toshiba_resume;
panel->panel_data.wait_vsync = toshiba_wait_vsync;
panel->panel_data.request_vsync = toshiba_request_vsync;
panel->panel_data.clear_vsync = toshiba_clear_vsync;
panel->panel_data.blank = toshiba_blank;
panel->panel_data.unblank = toshiba_unblank;
panel->panel_data.fb_data = &bridge_data->fb_data;
panel->panel_data.caps = MSMFB_CAP_PARTIAL_UPDATES;
panel->pdev.name = "msm_panel";
panel->pdev.id = pdev->id;
panel->pdev.resource = client_data->fb_resource;
panel->pdev.num_resources = 1;
panel->pdev.dev.platform_data = &panel->panel_data;
bridge_data->init(bridge_data, client_data);
platform_device_register(&panel->pdev);
return 0;
}
static int mddi_toshiba_remove(struct platform_device *pdev)
{
struct panel_info *panel = platform_get_drvdata(pdev);
setup_vsync(panel, 0);
kfree(panel);
return 0;
}
static struct platform_driver mddi_client_d263_0000 = {
.probe = mddi_toshiba_probe,
.remove = mddi_toshiba_remove,
.driver = { .name = "mddi_c_d263_0000" },
};
static int __init mddi_client_toshiba_init(void)
{
platform_driver_register(&mddi_client_d263_0000);
return 0;
}
module_init(mddi_client_toshiba_init);