- 根目录:
- drivers
- video
- omap2
- displays
- panel-picodlp.c
/*
* picodlp panel driver
* picodlp_i2c_driver: i2c_client driver
*
* Copyright (C) 2009-2011 Texas Instruments
* Author: Mythri P K <mythripk@ti.com>
* Mayuresh Janorkar <mayur@ti.com>
*
* 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.
*
* 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, see <http://www.gnu.org/licenses/>.
*/
#include <linux/module.h>
#include <linux/input.h>
#include <linux/platform_device.h>
#include <linux/interrupt.h>
#include <linux/firmware.h>
#include <linux/slab.h>
#include <linux/mutex.h>
#include <linux/i2c.h>
#include <linux/delay.h>
#include <linux/gpio.h>
#include <video/omapdss.h>
#include <video/omap-panel-data.h>
#include "panel-picodlp.h"
struct picodlp_data {
struct mutex lock;
struct i2c_client *picodlp_i2c_client;
};
static struct i2c_board_info picodlp_i2c_board_info = {
I2C_BOARD_INFO("picodlp_i2c_driver", 0x1b),
};
struct picodlp_i2c_data {
struct mutex xfer_lock;
};
static struct i2c_device_id picodlp_i2c_id[] = {
{ "picodlp_i2c_driver", 0 },
{ }
};
struct picodlp_i2c_command {
u8 reg;
u32 value;
};
static struct omap_video_timings pico_ls_timings = {
.x_res = 864,
.y_res = 480,
.hsw = 7,
.hfp = 11,
.hbp = 7,
.pixel_clock = 19200,
.vsw = 2,
.vfp = 3,
.vbp = 14,
.vsync_level = OMAPDSS_SIG_ACTIVE_LOW,
.hsync_level = OMAPDSS_SIG_ACTIVE_LOW,
.data_pclk_edge = OMAPDSS_DRIVE_SIG_RISING_EDGE,
.de_level = OMAPDSS_SIG_ACTIVE_HIGH,
.sync_pclk_edge = OMAPDSS_DRIVE_SIG_FALLING_EDGE,
};
static inline struct picodlp_panel_data
*get_panel_data(const struct omap_dss_device *dssdev)
{
return (struct picodlp_panel_data *) dssdev->data;
}
static u32 picodlp_i2c_read(struct i2c_client *client, u8 reg)
{
u8 read_cmd[] = {READ_REG_SELECT, reg}, data[4];
struct picodlp_i2c_data *picodlp_i2c_data = i2c_get_clientdata(client);
struct i2c_msg msg[2];
mutex_lock(&picodlp_i2c_data->xfer_lock);
msg[0].addr = client->addr;
msg[0].flags = 0;
msg[0].len = 2;
msg[0].buf = read_cmd;
msg[1].addr = client->addr;
msg[1].flags = I2C_M_RD;
msg[1].len = 4;
msg[1].buf = data;
i2c_transfer(client->adapter, msg, 2);
mutex_unlock(&picodlp_i2c_data->xfer_lock);
return (data[3] | (data[2] << 8) | (data[1] << 16) | (data[0] << 24));
}
static int picodlp_i2c_write_block(struct i2c_client *client,
u8 *data, int len)
{
struct i2c_msg msg;
int i, r, msg_count = 1;
struct picodlp_i2c_data *picodlp_i2c_data = i2c_get_clientdata(client);
if (len < 1 || len > 32) {
dev_err(&client->dev,
"too long syn_write_block len %d\n", len);
return -EIO;
}
mutex_lock(&picodlp_i2c_data->xfer_lock);
msg.addr = client->addr;
msg.flags = 0;
msg.len = len;
msg.buf = data;
r = i2c_transfer(client->adapter, &msg, msg_count);
mutex_unlock(&picodlp_i2c_data->xfer_lock);
/*
* i2c_transfer returns:
* number of messages sent in case of success
* a negative error number in case of failure
*/
if (r != msg_count)
goto err;
/* In case of success */
for (i = 0; i < len; i++)
dev_dbg(&client->dev,
"addr %x bw 0x%02x[%d]: 0x%02x\n",
client->addr, data[0] + i, i, data[i]);
return 0;
err:
dev_err(&client->dev, "picodlp_i2c_write error\n");
return r;
}
static int picodlp_i2c_write(struct i2c_client *client, u8 reg, u32 value)
{
u8 data[5];
int i;
data[0] = reg;
for (i = 1; i < 5; i++)
data[i] = (value >> (32 - (i) * 8)) & 0xFF;
return picodlp_i2c_write_block(client, data, 5);
}
static int picodlp_i2c_write_array(struct i2c_client *client,
const struct picodlp_i2c_command commands[],
int count)
{
int i, r = 0;
for (i = 0; i < count; i++) {
r = picodlp_i2c_write(client, commands[i].reg,
commands[i].value);
if (r)
return r;
}
return r;
}
static int picodlp_wait_for_dma_done(struct i2c_client *client)
{
u8 trial = 100;
do {
msleep(1);
if (!trial--)
return -ETIMEDOUT;
} while (picodlp_i2c_read(client, MAIN_STATUS) & DMA_STATUS);
return 0;
}
/**
* picodlp_i2c_init: i2c_initialization routine
* client: i2c_client for communication
*
* return
* 0 : Success, no error
* error code : Failure
*/
static int picodlp_i2c_init(struct i2c_client *client)
{
int r;
static const struct picodlp_i2c_command init_cmd_set1[] = {
{SOFT_RESET, 1},
{DMD_PARK_TRIGGER, 1},
{MISC_REG, 5},
{SEQ_CONTROL, 0},
{SEQ_VECTOR, 0x100},
{DMD_BLOCK_COUNT, 7},
{DMD_VCC_CONTROL, 0x109},
{DMD_PARK_PULSE_COUNT, 0xA},
{DMD_PARK_PULSE_WIDTH, 0xB},
{DMD_PARK_DELAY, 0x2ED},
{DMD_SHADOW_ENABLE, 0},
{FLASH_OPCODE, 0xB},
{FLASH_DUMMY_BYTES, 1},
{FLASH_ADDR_BYTES, 3},
{PBC_CONTROL, 0},
{FLASH_START_ADDR, CMT_LUT_0_START_ADDR},
{FLASH_READ_BYTES, CMT_LUT_0_SIZE},
{CMT_SPLASH_LUT_START_ADDR, 0},
{CMT_SPLASH_LUT_DEST_SELECT, CMT_LUT_ALL},
{PBC_CONTROL, 1},
};
static const struct picodlp_i2c_command init_cmd_set2[] = {
{PBC_CONTROL, 0},
{CMT_SPLASH_LUT_DEST_SELECT, 0},
{PBC_CONTROL, 0},
{FLASH_START_ADDR, SEQUENCE_0_START_ADDR},
{FLASH_READ_BYTES, SEQUENCE_0_SIZE},
{SEQ_RESET_LUT_START_ADDR, 0},
{SEQ_RESET_LUT_DEST_SELECT, SEQ_SEQ_LUT},
{PBC_CONTROL, 1},
};
static const struct picodlp_i2c_command init_cmd_set3[] = {
{PBC_CONTROL, 0},
{SEQ_RESET_LUT_DEST_SELECT, 0},
{PBC_CONTROL, 0},
{FLASH_START_ADDR, DRC_TABLE_0_START_ADDR},
{FLASH_READ_BYTES, DRC_TABLE_0_SIZE},
{SEQ_RESET_LUT_START_ADDR, 0},
{SEQ_RESET_LUT_DEST_SELECT, SEQ_DRC_LUT_ALL},
{PBC_CONTROL, 1},
};
static const struct picodlp_i2c_command init_cmd_set4[] = {
{PBC_CONTROL, 0},
{SEQ_RESET_LUT_DEST_SELECT, 0},
{SDC_ENABLE, 1},
{AGC_CTRL, 7},
{CCA_C1A, 0x100},
{CCA_C1B, 0x0},
{CCA_C1C, 0x0},
{CCA_C2A, 0x0},
{CCA_C2B, 0x100},
{CCA_C2C, 0x0},
{CCA_C3A, 0x0},
{CCA_C3B, 0x0},
{CCA_C3C, 0x100},
{CCA_C7A, 0x100},
{CCA_C7B, 0x100},
{CCA_C7C, 0x100},
{CCA_ENABLE, 1},
{CPU_IF_MODE, 1},
{SHORT_FLIP, 1},
{CURTAIN_CONTROL, 0},
{DMD_PARK_TRIGGER, 0},
{R_DRIVE_CURRENT, 0x298},
{G_DRIVE_CURRENT, 0x298},
{B_DRIVE_CURRENT, 0x298},
{RGB_DRIVER_ENABLE, 7},
{SEQ_CONTROL, 0},
{ACTGEN_CONTROL, 0x10},
{SEQUENCE_MODE, SEQ_LOCK},
{DATA_FORMAT, RGB888},
{INPUT_RESOLUTION, WVGA_864_LANDSCAPE},
{INPUT_SOURCE, PARALLEL_RGB},
{CPU_IF_SYNC_METHOD, 1},
{SEQ_CONTROL, 1}
};
r = picodlp_i2c_write_array(client, init_cmd_set1,
ARRAY_SIZE(init_cmd_set1));
if (r)
return r;
r = picodlp_wait_for_dma_done(client);
if (r)
return r;
r = picodlp_i2c_write_array(client, init_cmd_set2,
ARRAY_SIZE(init_cmd_set2));
if (r)
return r;
r = picodlp_wait_for_dma_done(client);
if (r)
return r;
r = picodlp_i2c_write_array(client, init_cmd_set3,
ARRAY_SIZE(init_cmd_set3));
if (r)
return r;
r = picodlp_wait_for_dma_done(client);
if (r)
return r;
r = picodlp_i2c_write_array(client, init_cmd_set4,
ARRAY_SIZE(init_cmd_set4));
if (r)
return r;
return 0;
}
static int picodlp_i2c_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
struct picodlp_i2c_data *picodlp_i2c_data;
picodlp_i2c_data = kzalloc(sizeof(struct picodlp_i2c_data), GFP_KERNEL);
if (!picodlp_i2c_data)
return -ENOMEM;
mutex_init(&picodlp_i2c_data->xfer_lock);
i2c_set_clientdata(client, picodlp_i2c_data);
return 0;
}
static int picodlp_i2c_remove(struct i2c_client *client)
{
struct picodlp_i2c_data *picodlp_i2c_data =
i2c_get_clientdata(client);
kfree(picodlp_i2c_data);
return 0;
}
static struct i2c_driver picodlp_i2c_driver = {
.driver = {
.name = "picodlp_i2c_driver",
},
.probe = picodlp_i2c_probe,
.remove = picodlp_i2c_remove,
.id_table = picodlp_i2c_id,
};
static int picodlp_panel_power_on(struct omap_dss_device *dssdev)
{
int r, trial = 100;
struct picodlp_data *picod = dev_get_drvdata(&dssdev->dev);
struct picodlp_panel_data *picodlp_pdata = get_panel_data(dssdev);
gpio_set_value(picodlp_pdata->pwrgood_gpio, 0);
msleep(1);
gpio_set_value(picodlp_pdata->pwrgood_gpio, 1);
while (!gpio_get_value(picodlp_pdata->emu_done_gpio)) {
if (!trial--) {
dev_err(&dssdev->dev, "emu_done signal not"
" going high\n");
return -ETIMEDOUT;
}
msleep(5);
}
/*
* As per dpp2600 programming guide,
* it is required to sleep for 1000ms after emu_done signal goes high
* then only i2c commands can be successfully sent to dpp2600
*/
msleep(1000);
omapdss_dpi_set_timings(dssdev, &dssdev->panel.timings);
omapdss_dpi_set_data_lines(dssdev, dssdev->phy.dpi.data_lines);
r = omapdss_dpi_display_enable(dssdev);
if (r) {
dev_err(&dssdev->dev, "failed to enable DPI\n");
goto err1;
}
r = picodlp_i2c_init(picod->picodlp_i2c_client);
if (r)
goto err;
dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;
return r;
err:
omapdss_dpi_display_disable(dssdev);
err1:
return r;
}
static void picodlp_panel_power_off(struct omap_dss_device *dssdev)
{
struct picodlp_panel_data *picodlp_pdata = get_panel_data(dssdev);
omapdss_dpi_display_disable(dssdev);
gpio_set_value(picodlp_pdata->emu_done_gpio, 0);
gpio_set_value(picodlp_pdata->pwrgood_gpio, 0);
}
static int picodlp_panel_probe(struct omap_dss_device *dssdev)
{
struct picodlp_data *picod;
struct picodlp_panel_data *picodlp_pdata = get_panel_data(dssdev);
struct i2c_adapter *adapter;
struct i2c_client *picodlp_i2c_client;
int r, picodlp_adapter_id;
dssdev->panel.timings = pico_ls_timings;
if (!picodlp_pdata)
return -EINVAL;
picod = devm_kzalloc(&dssdev->dev, sizeof(*picod), GFP_KERNEL);
if (!picod)
return -ENOMEM;
mutex_init(&picod->lock);
picodlp_adapter_id = picodlp_pdata->picodlp_adapter_id;
adapter = i2c_get_adapter(picodlp_adapter_id);
if (!adapter) {
dev_err(&dssdev->dev, "can't get i2c adapter\n");
return -ENODEV;
}
picodlp_i2c_client = i2c_new_device(adapter, &picodlp_i2c_board_info);
if (!picodlp_i2c_client) {
dev_err(&dssdev->dev, "can't add i2c device::"
" picodlp_i2c_client is NULL\n");
return -ENODEV;
}
picod->picodlp_i2c_client = picodlp_i2c_client;
dev_set_drvdata(&dssdev->dev, picod);
if (gpio_is_valid(picodlp_pdata->emu_done_gpio)) {
r = devm_gpio_request_one(&dssdev->dev,
picodlp_pdata->emu_done_gpio,
GPIOF_IN, "DLP EMU DONE");
if (r)
return r;
}
if (gpio_is_valid(picodlp_pdata->pwrgood_gpio)) {
r = devm_gpio_request_one(&dssdev->dev,
picodlp_pdata->pwrgood_gpio,
GPIOF_OUT_INIT_LOW, "DLP PWRGOOD");
if (r)
return r;
}
return 0;
}
static void picodlp_panel_remove(struct omap_dss_device *dssdev)
{
struct picodlp_data *picod = dev_get_drvdata(&dssdev->dev);
i2c_unregister_device(picod->picodlp_i2c_client);
dev_set_drvdata(&dssdev->dev, NULL);
dev_dbg(&dssdev->dev, "removing picodlp panel\n");
kfree(picod);
}
static int picodlp_panel_enable(struct omap_dss_device *dssdev)
{
struct picodlp_data *picod = dev_get_drvdata(&dssdev->dev);
int r;
dev_dbg(&dssdev->dev, "enabling picodlp panel\n");
mutex_lock(&picod->lock);
if (dssdev->state != OMAP_DSS_DISPLAY_DISABLED) {
mutex_unlock(&picod->lock);
return -EINVAL;
}
r = picodlp_panel_power_on(dssdev);
mutex_unlock(&picod->lock);
return r;
}
static void picodlp_panel_disable(struct omap_dss_device *dssdev)
{
struct picodlp_data *picod = dev_get_drvdata(&dssdev->dev);
mutex_lock(&picod->lock);
/* Turn off DLP Power */
if (dssdev->state == OMAP_DSS_DISPLAY_ACTIVE)
picodlp_panel_power_off(dssdev);
dssdev->state = OMAP_DSS_DISPLAY_DISABLED;
mutex_unlock(&picod->lock);
dev_dbg(&dssdev->dev, "disabling picodlp panel\n");
}
static void picodlp_get_resolution(struct omap_dss_device *dssdev,
u16 *xres, u16 *yres)
{
*xres = dssdev->panel.timings.x_res;
*yres = dssdev->panel.timings.y_res;
}
static struct omap_dss_driver picodlp_driver = {
.probe = picodlp_panel_probe,
.remove = picodlp_panel_remove,
.enable = picodlp_panel_enable,
.disable = picodlp_panel_disable,
.get_resolution = picodlp_get_resolution,
.driver = {
.name = "picodlp_panel",
.owner = THIS_MODULE,
},
};
static int __init picodlp_init(void)
{
int r = 0;
r = i2c_add_driver(&picodlp_i2c_driver);
if (r) {
printk(KERN_WARNING "picodlp_i2c_driver" \
" registration failed\n");
return r;
}
r = omap_dss_register_driver(&picodlp_driver);
if (r)
i2c_del_driver(&picodlp_i2c_driver);
return r;
}
static void __exit picodlp_exit(void)
{
i2c_del_driver(&picodlp_i2c_driver);
omap_dss_unregister_driver(&picodlp_driver);
}
module_init(picodlp_init);
module_exit(picodlp_exit);
MODULE_AUTHOR("Mythri P K <mythripk@ti.com>");
MODULE_DESCRIPTION("picodlp driver");
MODULE_LICENSE("GPL");