diff options
Diffstat (limited to 'ANDROID_3.4.5/drivers/video/backlight/ltv350qv.c')
| -rw-r--r-- | ANDROID_3.4.5/drivers/video/backlight/ltv350qv.c | 329 |
1 files changed, 0 insertions, 329 deletions
diff --git a/ANDROID_3.4.5/drivers/video/backlight/ltv350qv.c b/ANDROID_3.4.5/drivers/video/backlight/ltv350qv.c deleted file mode 100644 index 333949ff..00000000 --- a/ANDROID_3.4.5/drivers/video/backlight/ltv350qv.c +++ /dev/null @@ -1,329 +0,0 @@ -/* - * Power control for Samsung LTV350QV Quarter VGA LCD Panel - * - * Copyright (C) 2006, 2007 Atmel Corporation - * - * 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. - */ -#include <linux/delay.h> -#include <linux/err.h> -#include <linux/fb.h> -#include <linux/init.h> -#include <linux/lcd.h> -#include <linux/module.h> -#include <linux/slab.h> -#include <linux/spi/spi.h> - -#include "ltv350qv.h" - -#define POWER_IS_ON(pwr) ((pwr) <= FB_BLANK_NORMAL) - -struct ltv350qv { - struct spi_device *spi; - u8 *buffer; - int power; - struct lcd_device *ld; -}; - -/* - * The power-on and power-off sequences are taken from the - * LTV350QV-F04 data sheet from Samsung. The register definitions are - * taken from the S6F2002 command list also from Samsung. Both - * documents are distributed with the AVR32 Linux BSP CD from Atmel. - * - * There's still some voodoo going on here, but it's a lot better than - * in the first incarnation of the driver where all we had was the raw - * numbers from the initialization sequence. - */ -static int ltv350qv_write_reg(struct ltv350qv *lcd, u8 reg, u16 val) -{ - struct spi_message msg; - struct spi_transfer index_xfer = { - .len = 3, - .cs_change = 1, - }; - struct spi_transfer value_xfer = { - .len = 3, - }; - - spi_message_init(&msg); - - /* register index */ - lcd->buffer[0] = LTV_OPC_INDEX; - lcd->buffer[1] = 0x00; - lcd->buffer[2] = reg & 0x7f; - index_xfer.tx_buf = lcd->buffer; - spi_message_add_tail(&index_xfer, &msg); - - /* register value */ - lcd->buffer[4] = LTV_OPC_DATA; - lcd->buffer[5] = val >> 8; - lcd->buffer[6] = val; - value_xfer.tx_buf = lcd->buffer + 4; - spi_message_add_tail(&value_xfer, &msg); - - return spi_sync(lcd->spi, &msg); -} - -/* The comments are taken straight from the data sheet */ -static int ltv350qv_power_on(struct ltv350qv *lcd) -{ - int ret; - - /* Power On Reset Display off State */ - if (ltv350qv_write_reg(lcd, LTV_PWRCTL1, 0x0000)) - goto err; - msleep(15); - - /* Power Setting Function 1 */ - if (ltv350qv_write_reg(lcd, LTV_PWRCTL1, LTV_VCOM_DISABLE)) - goto err; - if (ltv350qv_write_reg(lcd, LTV_PWRCTL2, LTV_VCOML_ENABLE)) - goto err_power1; - - /* Power Setting Function 2 */ - if (ltv350qv_write_reg(lcd, LTV_PWRCTL1, - LTV_VCOM_DISABLE | LTV_DRIVE_CURRENT(5) - | LTV_SUPPLY_CURRENT(5))) - goto err_power2; - - msleep(55); - - /* Instruction Setting */ - ret = ltv350qv_write_reg(lcd, LTV_IFCTL, - LTV_NMD | LTV_REV | LTV_NL(0x1d)); - ret |= ltv350qv_write_reg(lcd, LTV_DATACTL, - LTV_DS_SAME | LTV_CHS_480 - | LTV_DF_RGB | LTV_RGB_BGR); - ret |= ltv350qv_write_reg(lcd, LTV_ENTRY_MODE, - LTV_VSPL_ACTIVE_LOW - | LTV_HSPL_ACTIVE_LOW - | LTV_DPL_SAMPLE_RISING - | LTV_EPL_ACTIVE_LOW - | LTV_SS_RIGHT_TO_LEFT); - ret |= ltv350qv_write_reg(lcd, LTV_GATECTL1, LTV_CLW(3)); - ret |= ltv350qv_write_reg(lcd, LTV_GATECTL2, - LTV_NW_INV_1LINE | LTV_FWI(3)); - ret |= ltv350qv_write_reg(lcd, LTV_VBP, 0x000a); - ret |= ltv350qv_write_reg(lcd, LTV_HBP, 0x0021); - ret |= ltv350qv_write_reg(lcd, LTV_SOTCTL, LTV_SDT(3) | LTV_EQ(0)); - ret |= ltv350qv_write_reg(lcd, LTV_GAMMA(0), 0x0103); - ret |= ltv350qv_write_reg(lcd, LTV_GAMMA(1), 0x0301); - ret |= ltv350qv_write_reg(lcd, LTV_GAMMA(2), 0x1f0f); - ret |= ltv350qv_write_reg(lcd, LTV_GAMMA(3), 0x1f0f); - ret |= ltv350qv_write_reg(lcd, LTV_GAMMA(4), 0x0707); - ret |= ltv350qv_write_reg(lcd, LTV_GAMMA(5), 0x0307); - ret |= ltv350qv_write_reg(lcd, LTV_GAMMA(6), 0x0707); - ret |= ltv350qv_write_reg(lcd, LTV_GAMMA(7), 0x0000); - ret |= ltv350qv_write_reg(lcd, LTV_GAMMA(8), 0x0004); - ret |= ltv350qv_write_reg(lcd, LTV_GAMMA(9), 0x0000); - if (ret) - goto err_settings; - - /* Wait more than 2 frames */ - msleep(20); - - /* Display On Sequence */ - ret = ltv350qv_write_reg(lcd, LTV_PWRCTL1, - LTV_VCOM_DISABLE | LTV_VCOMOUT_ENABLE - | LTV_POWER_ON | LTV_DRIVE_CURRENT(5) - | LTV_SUPPLY_CURRENT(5)); - ret |= ltv350qv_write_reg(lcd, LTV_GATECTL2, - LTV_NW_INV_1LINE | LTV_DSC | LTV_FWI(3)); - if (ret) - goto err_disp_on; - - /* Display should now be ON. Phew. */ - return 0; - -err_disp_on: - /* - * Try to recover. Error handling probably isn't very useful - * at this point, just make a best effort to switch the panel - * off. - */ - ltv350qv_write_reg(lcd, LTV_PWRCTL1, - LTV_VCOM_DISABLE | LTV_DRIVE_CURRENT(5) - | LTV_SUPPLY_CURRENT(5)); - ltv350qv_write_reg(lcd, LTV_GATECTL2, - LTV_NW_INV_1LINE | LTV_FWI(3)); -err_settings: -err_power2: -err_power1: - ltv350qv_write_reg(lcd, LTV_PWRCTL2, 0x0000); - msleep(1); -err: - ltv350qv_write_reg(lcd, LTV_PWRCTL1, LTV_VCOM_DISABLE); - return -EIO; -} - -static int ltv350qv_power_off(struct ltv350qv *lcd) -{ - int ret; - - /* Display Off Sequence */ - ret = ltv350qv_write_reg(lcd, LTV_PWRCTL1, - LTV_VCOM_DISABLE - | LTV_DRIVE_CURRENT(5) - | LTV_SUPPLY_CURRENT(5)); - ret |= ltv350qv_write_reg(lcd, LTV_GATECTL2, - LTV_NW_INV_1LINE | LTV_FWI(3)); - - /* Power down setting 1 */ - ret |= ltv350qv_write_reg(lcd, LTV_PWRCTL2, 0x0000); - - /* Wait at least 1 ms */ - msleep(1); - - /* Power down setting 2 */ - ret |= ltv350qv_write_reg(lcd, LTV_PWRCTL1, LTV_VCOM_DISABLE); - - /* - * No point in trying to recover here. If we can't switch the - * panel off, what are we supposed to do other than inform the - * user about the failure? - */ - if (ret) - return -EIO; - - /* Display power should now be OFF */ - return 0; -} - -static int ltv350qv_power(struct ltv350qv *lcd, int power) -{ - int ret = 0; - - if (POWER_IS_ON(power) && !POWER_IS_ON(lcd->power)) - ret = ltv350qv_power_on(lcd); - else if (!POWER_IS_ON(power) && POWER_IS_ON(lcd->power)) - ret = ltv350qv_power_off(lcd); - - if (!ret) - lcd->power = power; - - return ret; -} - -static int ltv350qv_set_power(struct lcd_device *ld, int power) -{ - struct ltv350qv *lcd = lcd_get_data(ld); - - return ltv350qv_power(lcd, power); -} - -static int ltv350qv_get_power(struct lcd_device *ld) -{ - struct ltv350qv *lcd = lcd_get_data(ld); - - return lcd->power; -} - -static struct lcd_ops ltv_ops = { - .get_power = ltv350qv_get_power, - .set_power = ltv350qv_set_power, -}; - -static int __devinit ltv350qv_probe(struct spi_device *spi) -{ - struct ltv350qv *lcd; - struct lcd_device *ld; - int ret; - - lcd = kzalloc(sizeof(struct ltv350qv), GFP_KERNEL); - if (!lcd) - return -ENOMEM; - - lcd->spi = spi; - lcd->power = FB_BLANK_POWERDOWN; - lcd->buffer = kzalloc(8, GFP_KERNEL); - if (!lcd->buffer) { - ret = -ENOMEM; - goto out_free_lcd; - } - - ld = lcd_device_register("ltv350qv", &spi->dev, lcd, <v_ops); - if (IS_ERR(ld)) { - ret = PTR_ERR(ld); - goto out_free_buffer; - } - lcd->ld = ld; - - ret = ltv350qv_power(lcd, FB_BLANK_UNBLANK); - if (ret) - goto out_unregister; - - dev_set_drvdata(&spi->dev, lcd); - - return 0; - -out_unregister: - lcd_device_unregister(ld); -out_free_buffer: - kfree(lcd->buffer); -out_free_lcd: - kfree(lcd); - return ret; -} - -static int __devexit ltv350qv_remove(struct spi_device *spi) -{ - struct ltv350qv *lcd = dev_get_drvdata(&spi->dev); - - ltv350qv_power(lcd, FB_BLANK_POWERDOWN); - lcd_device_unregister(lcd->ld); - kfree(lcd->buffer); - kfree(lcd); - - return 0; -} - -#ifdef CONFIG_PM -static int ltv350qv_suspend(struct spi_device *spi, pm_message_t state) -{ - struct ltv350qv *lcd = dev_get_drvdata(&spi->dev); - - return ltv350qv_power(lcd, FB_BLANK_POWERDOWN); -} - -static int ltv350qv_resume(struct spi_device *spi) -{ - struct ltv350qv *lcd = dev_get_drvdata(&spi->dev); - - return ltv350qv_power(lcd, FB_BLANK_UNBLANK); -} -#else -#define ltv350qv_suspend NULL -#define ltv350qv_resume NULL -#endif - -/* Power down all displays on reboot, poweroff or halt */ -static void ltv350qv_shutdown(struct spi_device *spi) -{ - struct ltv350qv *lcd = dev_get_drvdata(&spi->dev); - - ltv350qv_power(lcd, FB_BLANK_POWERDOWN); -} - -static struct spi_driver ltv350qv_driver = { - .driver = { - .name = "ltv350qv", - .bus = &spi_bus_type, - .owner = THIS_MODULE, - }, - - .probe = ltv350qv_probe, - .remove = __devexit_p(ltv350qv_remove), - .shutdown = ltv350qv_shutdown, - .suspend = ltv350qv_suspend, - .resume = ltv350qv_resume, -}; - -module_spi_driver(ltv350qv_driver); - -MODULE_AUTHOR("Haavard Skinnemoen (Atmel)"); -MODULE_DESCRIPTION("Samsung LTV350QV LCD Driver"); -MODULE_LICENSE("GPL"); -MODULE_ALIAS("spi:ltv350qv"); |