diff options
Diffstat (limited to 'packages/linux/linux-rp-2.6.24/tosa/0052-tosa-platform-backlight-support.patch')
| -rw-r--r-- | packages/linux/linux-rp-2.6.24/tosa/0052-tosa-platform-backlight-support.patch | 400 |
1 files changed, 400 insertions, 0 deletions
diff --git a/packages/linux/linux-rp-2.6.24/tosa/0052-tosa-platform-backlight-support.patch b/packages/linux/linux-rp-2.6.24/tosa/0052-tosa-platform-backlight-support.patch new file mode 100644 index 0000000000..ef5263c18e --- /dev/null +++ b/packages/linux/linux-rp-2.6.24/tosa/0052-tosa-platform-backlight-support.patch @@ -0,0 +1,400 @@ +From c7537657bc33d4ee1616accd0259e160d57c5c1b Mon Sep 17 00:00:00 2001 +From: Ian Molton <spyro@f2s.com> +Date: Wed, 9 Jan 2008 02:05:40 +0300 +Subject: [PATCH 52/64] tosa platform backlight support + +Signed-off-by: Dmitry Baryshkov <dbaryshkov@gmail.com> +--- + drivers/video/backlight/Kconfig | 10 + + drivers/video/backlight/Makefile | 1 + + drivers/video/backlight/tosa_bl.c | 345 +++++++++++++++++++++++++++++++++++++ + 3 files changed, 356 insertions(+), 0 deletions(-) + create mode 100644 drivers/video/backlight/tosa_bl.c + +diff --git a/drivers/video/backlight/Kconfig b/drivers/video/backlight/Kconfig +index 9609a6c..f47a601 100644 +--- a/drivers/video/backlight/Kconfig ++++ b/drivers/video/backlight/Kconfig +@@ -59,6 +59,16 @@ config BACKLIGHT_CORGI + known as the Corgi backlight driver. If you have a Sharp Zaurus + SL-C7xx, SL-Cxx00 or SL-6000x say y. Most users can say n. + ++config BACKLIGHT_TOSA ++ tristate "Sharp Tosa LCD/Backlight Driver (SL-6000)" ++ depends on BACKLIGHT_CLASS_DEVICE && MACH_TOSA ++ default y ++ select I2C ++ select I2C_PXA ++ select PXA_SSP ++ help ++ If you have a Sharp Zaurus SL-6000y enable this driver. ++ + config BACKLIGHT_LOCOMO + tristate "Sharp LOCOMO LCD/Backlight Driver" + depends on BACKLIGHT_CLASS_DEVICE && SHARP_LOCOMO +diff --git a/drivers/video/backlight/Makefile b/drivers/video/backlight/Makefile +index 965a78b..e8a6a7c 100644 +--- a/drivers/video/backlight/Makefile ++++ b/drivers/video/backlight/Makefile +@@ -5,6 +5,7 @@ obj-$(CONFIG_LCD_LTV350QV) += ltv350qv.o + + obj-$(CONFIG_BACKLIGHT_CLASS_DEVICE) += backlight.o + obj-$(CONFIG_BACKLIGHT_CORGI) += corgi_bl.o ++obj-$(CONFIG_BACKLIGHT_TOSA) += tosa_bl.o + obj-$(CONFIG_BACKLIGHT_HP680) += hp680_bl.o + obj-$(CONFIG_BACKLIGHT_LOCOMO) += locomolcd.o + obj-$(CONFIG_BACKLIGHT_PROGEAR) += progear_bl.o +diff --git a/drivers/video/backlight/tosa_bl.c b/drivers/video/backlight/tosa_bl.c +new file mode 100644 +index 0000000..11a89c6 +--- /dev/null ++++ b/drivers/video/backlight/tosa_bl.c +@@ -0,0 +1,345 @@ ++/* ++ * LCD / Backlight control code for Sharp SL-6000x (tosa) ++ * ++ * Copyright (c) 2005 Dirk Opfer ++ * Copyright (c) 2007 Dmitry Baryshkov ++ * ++ * 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/kernel.h> ++#include <linux/module.h> ++#include <linux/i2c.h> ++#include <linux/backlight.h> ++#include <linux/platform_device.h> ++#include <linux/delay.h> ++#include <linux/fb.h> ++#include <linux/mfd/tc6393xb.h> ++ ++#include <asm/hardware/scoop.h> ++#include <asm/mach/sharpsl_param.h> ++#include <asm/arch/ssp.h> ++#include <asm/arch/pxa-regs.h> ++#include <asm/arch/tosa.h> ++#include <asm/gpio.h> ++ ++#define DAC_BASE 0x4e ++#define DAC_CH1 0 ++#define DAC_CH2 1 ++ ++#define TG_REG0_VQV 0x0001 ++#define TG_REG0_COLOR 0x0002 ++#define TG_REG0_UD 0x0004 ++#define TG_REG0_LR 0x0008 ++#define COMADJ_DEFAULT 97 ++ ++static unsigned short normal_i2c[] = { DAC_BASE, I2C_CLIENT_END }; ++I2C_CLIENT_INSMOD; ++ ++struct tosa_bl_data { ++ struct i2c_client client; ++ ++ int comadj; ++ spinlock_t nssp_lock; ++ struct ssp_dev nssp_dev; ++ struct ssp_state nssp_state; ++ ++ struct backlight_device *bl_dev; ++}; ++ ++static struct i2c_driver tosa_bl_driver; ++ ++static void pxa_nssp_output(struct tosa_bl_data *data, unsigned char reg, unsigned char value) ++{ ++ unsigned long flag; ++ u32 dummy; ++ u32 dat = ( ((reg << 5) & 0xe0) | (value & 0x1f) ); ++ spin_lock_irqsave(&data->nssp_lock, flag); ++ ++ ssp_config(&data->nssp_dev, (SSCR0_Motorola | (SSCR0_DSS & 0x07 )), 0, 0, SSCR0_SerClkDiv(128)); ++ ssp_enable(&data->nssp_dev); ++ ++ ssp_write_word(&data->nssp_dev,dat); ++ ++ /* Read null data back from device to prevent SSP overflow */ ++ ssp_read_word(&data->nssp_dev, &dummy); ++ ssp_disable(&data->nssp_dev); ++ spin_unlock_irqrestore(&data->nssp_lock, flag); ++ ++} ++ ++static void tosa_set_backlight(struct tosa_bl_data *data, int brightness) ++{ ++ /* SetBacklightDuty */ ++ i2c_smbus_write_byte_data(&data->client, DAC_CH2, (unsigned char)brightness); ++ ++ /* SetBacklightVR */ ++ if (brightness) ++ gpio_set_value(TOSA_TC6393XB_BL_C20MA, 1); ++ else ++ gpio_set_value(TOSA_TC6393XB_BL_C20MA, 0); ++ ++ /* bl_enable GP04=1 otherwise GP04=0*/ ++ pxa_nssp_output(data, TG_GPODR2, brightness ? 0x01 : 0x00); ++} ++ ++static void tosa_lcd_tg_init(struct tosa_bl_data *data) ++{ ++ dev_dbg(&data->bl_dev->dev, "tosa_lcd_init\n"); ++ ++ /* L3V On */ ++ set_scoop_gpio( &tosascoop_jc_device.dev,TOSA_SCOOP_JC_TC6393XB_L3V_ON); ++ mdelay(60); ++ ++ /* TG On */ ++ gpio_set_value(TOSA_TC6393XB_TG_ON, 0); ++ mdelay(60); ++ ++ pxa_nssp_output(data, TG_TPOSCTL,0x00); /* delayed 0clk TCTL signal for VGA */ ++ pxa_nssp_output(data, TG_GPOSR,0x02); /* GPOS0=powercontrol, GPOS1=GPIO, GPOS2=TCTL */ ++} ++ ++static void tosa_lcd_tg_on(struct tosa_bl_data *data/*, const struct fb_videomode *mode*/) ++{ ++ const int value = TG_REG0_COLOR | TG_REG0_UD | TG_REG0_LR; ++ ++ tosa_lcd_tg_init(data); ++ ++ dev_dbg(&data->bl_dev->dev, "tosa_lcd_on\n"); ++ pxa_nssp_output(data, TG_PNLCTL, value | (/*mode->yres == 320 ? 0 : */ TG_REG0_VQV)); ++ ++ /* TG LCD pannel power up */ ++ pxa_nssp_output(data, TG_PINICTL,0x4); ++ mdelay(50); ++ ++ /* TG LCD GVSS */ ++ pxa_nssp_output(data, TG_PINICTL,0x0); ++ mdelay(50); ++ ++ /* set common voltage */ ++ i2c_smbus_write_byte_data(&data->client, DAC_CH1, data->comadj); ++} ++ ++static void tosa_lcd_tg_off(struct tosa_bl_data *data) ++{ ++ tosa_set_backlight(data, 0); ++ dev_dbg(&data->bl_dev->dev, "tosa_lcd_off\n"); ++ /* TG LCD VHSA off */ ++ pxa_nssp_output(data, TG_PINICTL,0x4); ++ mdelay(50); ++ ++ /* TG LCD signal off */ ++ pxa_nssp_output(data, TG_PINICTL,0x6); ++ mdelay(50); ++ ++ /* TG Off */ ++ gpio_set_value(TOSA_TC6393XB_TG_ON, 1); ++ mdelay(100); ++ ++ /* L3V Off */ ++ reset_scoop_gpio( &tosascoop_jc_device.dev,TOSA_SCOOP_JC_TC6393XB_L3V_ON); ++} ++ ++ ++static int tosa_bl_update_status(struct backlight_device *dev) ++{ ++ struct backlight_properties *props = &dev->props; ++ struct tosa_bl_data *data = dev_get_drvdata(&dev->dev); ++ int new_power = max(props->power, props->fb_blank); ++ ++ tosa_set_backlight(data, props->brightness); ++ ++ if (new_power) ++ tosa_lcd_tg_off(data); ++ else ++ tosa_lcd_tg_on(data); ++ ++ return 0; ++} ++ ++static int tosa_bl_get_brightness(struct backlight_device *dev) ++{ ++ struct backlight_properties *props = &dev->props; ++ ++ return props->brightness; ++} ++ ++static struct backlight_ops tosa_bl_ops = { ++ .get_brightness = tosa_bl_get_brightness, ++ .update_status = tosa_bl_update_status, ++}; ++ ++static int tosa_bl_detect_client(struct i2c_adapter *adapter, int address, ++ int kind) ++{ ++ int err = 0; ++ struct i2c_client *client; ++ struct tosa_bl_data *data; ++ ++ if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA )) ++ goto out; ++ ++ if (!(data = kzalloc(sizeof(struct tosa_bl_data), GFP_KERNEL))) { ++ err = -ENOMEM; ++ goto out; ++ } ++ ++ client = &data->client; ++ i2c_set_clientdata(client, data); ++ ++ client->addr = address; ++ client->adapter = adapter; ++ client->driver = &tosa_bl_driver; ++ ++ strlcpy(client->name, "tosa_bl", I2C_NAME_SIZE); ++ ++ spin_lock_init(&data->nssp_lock); ++ data->comadj = sharpsl_param.comadj == -1 ? COMADJ_DEFAULT : sharpsl_param.comadj; ++ ++ err = gpio_request(TOSA_TC6393XB_BL_C20MA, "backlight"); ++ if (err) { ++ dev_dbg(&data->bl_dev->dev, "Unable to request gpio!\n"); ++ goto err_gpio_bl; ++ } ++ ++ err = gpio_request(TOSA_TC6393XB_TG_ON, "tg"); ++ if (err) { ++ dev_dbg(&data->bl_dev->dev, "Unable to request gpio!\n"); ++ goto err_gpio_tg; ++ } ++ ++ err = ssp_init(&data->nssp_dev,2,0); ++ if (err) { ++ dev_err(&data->bl_dev->dev, "Unable to register NSSP handler!\n"); ++ goto err_ssp_init; ++ } ++ ++ /* Tell the i2c layer a new client has arrived */ ++ err = i2c_attach_client(client); ++ if (err) ++ goto err_i2c_attach; ++ ++ gpio_direction_output(TOSA_TC6393XB_BL_C20MA, 0); ++ gpio_direction_output(TOSA_TC6393XB_TG_ON, 1); ++ ++ tosa_lcd_tg_init(data); ++ ++ data->bl_dev = backlight_device_register("tosa_bl", ++ &client->dev, data, &tosa_bl_ops); ++ if (err) ++ goto err_bl_register; ++ ++ data->bl_dev->props.brightness = 69; ++ data->bl_dev->props.max_brightness = 255; ++ data->bl_dev->props.power = FB_BLANK_UNBLANK; ++ backlight_update_status(data->bl_dev); ++ ++ ++ return 0; ++ ++err_bl_register: ++ tosa_set_backlight(data, 0); ++ tosa_lcd_tg_off(data); ++ ++ err = i2c_detach_client(client); ++ if (err) ++ return err; ++err_i2c_attach: ++ ssp_exit(&data->nssp_dev); ++err_ssp_init: ++ gpio_free(TOSA_TC6393XB_TG_ON); ++err_gpio_tg: ++ gpio_free(TOSA_TC6393XB_BL_C20MA); ++err_gpio_bl: ++ kfree(data); ++out: ++ return err; ++} ++ ++static int tosa_bl_detach_client(struct i2c_client *client) ++{ ++ int err = 0; ++ struct tosa_bl_data *data = i2c_get_clientdata(client); ++ ++ backlight_device_unregister(data->bl_dev); ++ ++ tosa_set_backlight(data, 0); ++ tosa_lcd_tg_off(data); ++ ++ /* Try to detach the client from i2c space */ ++ if ((err = i2c_detach_client(client))) ++ return err; ++ ++ ssp_exit(&data->nssp_dev); ++ ++ gpio_free(TOSA_TC6393XB_TG_ON); ++ gpio_free(TOSA_TC6393XB_BL_C20MA); ++ ++ kfree(data); ++ ++ return err; ++} ++ ++#ifdef CONFIG_PM ++static int tosa_bl_suspend(struct i2c_client *client, pm_message_t mesg) ++{ ++ struct tosa_bl_data *data = i2c_get_clientdata(client); ++ ++ tosa_lcd_tg_off(data); ++ ssp_flush(&data->nssp_dev); ++ ssp_save_state(&data->nssp_dev,&data->nssp_state); ++ ++ return 0; ++} ++ ++static int tosa_bl_resume(struct i2c_client *client) ++{ ++ struct tosa_bl_data *data = i2c_get_clientdata(client); ++ ++ ssp_restore_state(&data->nssp_dev,&data->nssp_state); ++ ssp_enable(&data->nssp_dev); ++ tosa_bl_update_status(data->bl_dev); ++ ++ return 0; ++} ++#else ++#define tosa_bl_suspend NULL ++#define tosa_bl_resume NULL ++#endif ++ ++static int tosa_bl_attach_adapter(struct i2c_adapter *adapter) ++{ ++ return i2c_probe(adapter, &addr_data, &tosa_bl_detect_client); ++} ++ ++static struct i2c_driver tosa_bl_driver = { ++ .driver = { ++ .name = "tosa_bl", ++ }, ++ ++ .attach_adapter = tosa_bl_attach_adapter, ++ .detach_client = tosa_bl_detach_client, ++ ++ .suspend = tosa_bl_suspend, ++ .resume = tosa_bl_resume, ++}; ++ ++static int __init tosa_bl_init(void) ++{ ++ return i2c_add_driver(&tosa_bl_driver); ++} ++ ++static void __exit tosa_bl_cleanup (void) ++{ ++ i2c_del_driver(&tosa_bl_driver); ++} ++ ++module_init(tosa_bl_init); ++module_exit(tosa_bl_cleanup); ++ ++MODULE_DESCRIPTION("Tosa LCD device"); ++MODULE_AUTHOR("Dirk Opfer, Dmitry Baryshkov"); ++MODULE_LICENSE("GPL v2"); +-- +1.5.3.8 + |