diff options
Diffstat (limited to 'drivers/video')
| -rw-r--r-- | drivers/video/backlight/Kconfig | 18 | ||||
| -rw-r--r-- | drivers/video/backlight/Makefile | 3 | ||||
| -rw-r--r-- | drivers/video/backlight/tosa_bl.c | 198 | ||||
| -rw-r--r-- | drivers/video/backlight/tosa_lcd.c | 280 |
4 files changed, 499 insertions, 0 deletions
diff --git a/drivers/video/backlight/Kconfig b/drivers/video/backlight/Kconfig index c72a135..10b701f 100644 --- a/drivers/video/backlight/Kconfig +++ b/drivers/video/backlight/Kconfig @@ -75,6 +75,15 @@ config LCD_PLATFORM This driver provides a platform-device registered LCD power control interface. +config LCD_TOSA + tristate "Sharp SL-6000 LCD Driver" + depends on LCD_CLASS_DEVICE && SPI + depends on MACH_TOSA + default n + help + If you have an Sharp SL-6000 Zaurus say Y to enable a driver + for its LCD. + # # Backlight # @@ -179,3 +188,12 @@ config BACKLIGHT_MBP_NVIDIA If you have an Apple Macbook Pro with Nvidia graphics hardware say Y to enable a driver for its backlight +config BACKLIGHT_TOSA + tristate "Sharp SL-6000 Backlight Driver" + depends on BACKLIGHT_CLASS_DEVICE && I2C + depends on MACH_TOSA && LCD_TOSA + default n + help + If you have an Sharp SL-6000 Zaurus say Y to enable a driver + for its backlight + diff --git a/drivers/video/backlight/Makefile b/drivers/video/backlight/Makefile index 3ec551e..36f2026 100644 --- a/drivers/video/backlight/Makefile +++ b/drivers/video/backlight/Makefile @@ -7,6 +7,7 @@ obj-$(CONFIG_LCD_ILI9320) += ili9320.o obj-$(CONFIG_LCD_PLATFORM) += platform_lcd.o obj-$(CONFIG_LCD_VGG2432A4) += vgg2432a4.o obj-$(CONFIG_LCD_TDO24M) += tdo24m.o +obj-$(CONFIG_LCD_TOSA) += tosa_lcd.o obj-$(CONFIG_BACKLIGHT_CLASS_DEVICE) += backlight.o obj-$(CONFIG_BACKLIGHT_ATMEL_PWM) += atmel-pwm-bl.o @@ -18,4 +19,6 @@ obj-$(CONFIG_BACKLIGHT_PROGEAR) += progear_bl.o obj-$(CONFIG_BACKLIGHT_CARILLO_RANCH) += cr_bllcd.o obj-$(CONFIG_BACKLIGHT_PWM) += pwm_bl.o obj-$(CONFIG_BACKLIGHT_MBP_NVIDIA) += mbp_nvidia_bl.o +obj-$(CONFIG_BACKLIGHT_TOSA) += tosa_bl.o + diff --git a/drivers/video/backlight/tosa_bl.c b/drivers/video/backlight/tosa_bl.c new file mode 100644 index 0000000..43edbad --- /dev/null +++ b/drivers/video/backlight/tosa_bl.c @@ -0,0 +1,198 @@ +/* + * LCD / Backlight control code for Sharp SL-6000x (tosa) + * + * Copyright (c) 2005 Dirk Opfer + * Copyright (c) 2007,2008 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/device.h> +#include <linux/spi/spi.h> +#include <linux/i2c.h> +#include <linux/gpio.h> +#include <linux/fb.h> +#include <linux/backlight.h> + +#include <asm/mach/sharpsl_param.h> + +#include <mach/tosa.h> + +#define COMADJ_DEFAULT 97 + +#define DAC_CH1 0 +#define DAC_CH2 1 + +struct tosa_bl_data { + struct i2c_client *i2c; + struct backlight_device *bl; + + int comadj; +}; + +static void tosa_bl_set_backlight(struct tosa_bl_data *data, int brightness) +{ + struct spi_device *spi = data->i2c->dev.platform_data; + + i2c_smbus_write_byte_data(data->i2c, DAC_CH1, data->comadj); + + /* SetBacklightDuty */ + i2c_smbus_write_byte_data(data->i2c, DAC_CH2, (u8)(brightness & 0xff)); + + /* SetBacklightVR */ + gpio_set_value(TOSA_GPIO_BL_C20MA, brightness & 0x100); + + tosa_bl_enable(spi, brightness); +} + +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 power = max(props->power, props->fb_blank); + int brightness = props->brightness; + + if (power) + brightness = 0; + + tosa_bl_set_backlight(data, brightness); + + 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 bl_ops = { + .get_brightness = tosa_bl_get_brightness, + .update_status = tosa_bl_update_status, +}; + +static int __devinit tosa_bl_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + struct tosa_bl_data *data = kzalloc(sizeof(struct tosa_bl_data), GFP_KERNEL); + int ret = 0; + if (!data) + return -ENOMEM; + + data->comadj = sharpsl_param.comadj == -1 ? COMADJ_DEFAULT : sharpsl_param.comadj; + + ret = gpio_request(TOSA_GPIO_BL_C20MA, "backlight"); + if (ret) { + dev_dbg(&data->bl->dev, "Unable to request gpio!\n"); + goto err_gpio_bl; + } + ret = gpio_direction_output(TOSA_GPIO_BL_C20MA, 0); + if (ret) + goto err_gpio_dir; + + i2c_set_clientdata(client, data); + data->i2c = client; + + data->bl = backlight_device_register("tosa-bl", &client->dev, + data, &bl_ops); + if (IS_ERR(data->bl)) { + ret = PTR_ERR(data->bl); + goto err_reg; + } + + data->bl->props.brightness = 69; + data->bl->props.max_brightness = 512 - 1; + data->bl->props.power = FB_BLANK_UNBLANK; + + backlight_update_status(data->bl); + + return 0; + +err_reg: + data->bl = NULL; + i2c_set_clientdata(client, NULL); +err_gpio_dir: + gpio_free(TOSA_GPIO_BL_C20MA); +err_gpio_bl: + kfree(data); + return ret; +} + +static int __devexit tosa_bl_remove(struct i2c_client *client) +{ + struct tosa_bl_data *data = i2c_get_clientdata(client); + + backlight_device_unregister(data->bl); + data->bl = NULL; + i2c_set_clientdata(client, NULL); + + gpio_free(TOSA_GPIO_BL_C20MA); + + kfree(data); + + return 0; +} + +#ifdef CONFIG_PM +static int tosa_bl_suspend(struct i2c_client *client, pm_message_t pm) +{ + struct tosa_bl_data *data = i2c_get_clientdata(client); + + tosa_bl_set_backlight(data, 0); + + return 0; +} + +static int tosa_bl_resume(struct i2c_client *client) +{ + struct tosa_bl_data *data = i2c_get_clientdata(client); + + backlight_update_status(data->bl); + return 0; +} +#else +#define tosa_bl_suspend NULL +#define tosa_bl_resume NULL +#endif + +static const struct i2c_device_id tosa_bl_id[] = { + { "tosa-bl", 0 }, + { }, +}; + + +static struct i2c_driver tosa_bl_driver = { + .driver = { + .name = "tosa-bl", + .owner = THIS_MODULE, + }, + .probe = tosa_bl_probe, + .remove = __devexit_p(tosa_bl_remove), + .suspend = tosa_bl_suspend, + .resume = tosa_bl_resume, + .id_table = tosa_bl_id, +}; + +static int __init tosa_bl_init(void) +{ + return i2c_add_driver(&tosa_bl_driver); +} + +static void __exit tosa_bl_exit(void) +{ + i2c_del_driver(&tosa_bl_driver); +} + +module_init(tosa_bl_init); +module_exit(tosa_bl_exit); + +MODULE_AUTHOR("Dmitry Baryshkov"); +MODULE_LICENSE("GPL v2"); +MODULE_DESCRIPTION("LCD/Backlight control for Sharp SL-6000 PDA"); + diff --git a/drivers/video/backlight/tosa_lcd.c b/drivers/video/backlight/tosa_lcd.c new file mode 100644 index 0000000..57a2664 --- /dev/null +++ b/drivers/video/backlight/tosa_lcd.c @@ -0,0 +1,280 @@ +/* + * LCD / Backlight control code for Sharp SL-6000x (tosa) + * + * Copyright (c) 2005 Dirk Opfer + * Copyright (c) 2007,2008 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/device.h> +#include <linux/spi/spi.h> +#include <linux/i2c.h> +#include <linux/gpio.h> +#include <linux/delay.h> +#include <linux/lcd.h> +#include <linux/fb.h> + +#include <asm/mach/sharpsl_param.h> + +#include <mach/tosa.h> + +#define POWER_IS_ON(pwr) ((pwr) <= FB_BLANK_NORMAL) + +#define TG_REG0_VQV 0x0001 +#define TG_REG0_COLOR 0x0002 +#define TG_REG0_UD 0x0004 +#define TG_REG0_LR 0x0008 + +#define DAC_BASE 0x4e + +struct tosa_lcd_data { + struct spi_device *spi; + struct lcd_device *lcd; + struct i2c_client *i2c; + + int lcd_power; +}; + +static int tosa_tg_send(struct spi_device *spi, int adrs, uint8_t data) +{ + u8 buf[1]; + struct spi_message msg; + struct spi_transfer xfer = { + .len = 1, + .cs_change = 1, + .tx_buf = buf, + }; + + buf[0] = ((adrs & 0x07) << 5) | (data & 0x1f); + spi_message_init(&msg); + spi_message_add_tail(&xfer, &msg); + + return spi_sync(spi, &msg); +} + +int tosa_bl_enable(struct spi_device *spi, int enable) +{ + /* bl_enable GP04=1 otherwise GP04=0*/ + return tosa_tg_send(spi, TG_GPODR2, enable? 0x01 : 0x00); +} +EXPORT_SYMBOL(tosa_bl_enable); + +static void tosa_lcd_tg_init(struct tosa_lcd_data *data) +{ + /* TG on */ + gpio_set_value(TOSA_GPIO_TG_ON, 0); + + mdelay(60); + + /* delayed 0clk TCTL signal for VGA */ + tosa_tg_send(data->spi, TG_TPOSCTL, 0x00); + /* GPOS0=powercontrol, GPOS1=GPIO, GPOS2=TCTL */ + tosa_tg_send(data->spi, TG_GPOSR, 0x02); +} + +static void tosa_lcd_tg_on(struct tosa_lcd_data *data) +{ + struct spi_device *spi = data->spi; + const int value = TG_REG0_COLOR | TG_REG0_UD | TG_REG0_LR; + tosa_tg_send(spi, TG_PNLCTL, value | TG_REG0_VQV); /* this depends on mode */ + + /* TG LCD pannel power up */ + tosa_tg_send(spi, TG_PINICTL,0x4); + mdelay(50); + + /* TG LCD GVSS */ + tosa_tg_send(spi, TG_PINICTL,0x0); + + if (!data->i2c) { + /* after the pannel is powered up the first time, we can access the i2c bus */ + /* so probe for the DAC */ + struct i2c_adapter *adap = i2c_get_adapter(0); + struct i2c_board_info info = { + .type = "tosa-bl", + .addr = DAC_BASE, + .platform_data = data->spi, + }; + data->i2c = i2c_new_device(adap, &info); + } +} + +static void tosa_lcd_tg_off(struct tosa_lcd_data *data) +{ + struct spi_device *spi = data->spi; + + /* TG LCD VHSA off */ + tosa_tg_send(spi, TG_PINICTL,0x4); + mdelay(50); + + /* TG LCD signal off */ + tosa_tg_send(spi, TG_PINICTL,0x6); + mdelay(50); + + /* TG Off */ + gpio_set_value(TOSA_GPIO_TG_ON, 1); + mdelay(100); +} + +int tosa_lcd_set_power(struct lcd_device *lcd, int power) +{ + struct tosa_lcd_data *data = lcd_get_data(lcd); + + if (POWER_IS_ON(power) && !POWER_IS_ON(data->lcd_power)) + tosa_lcd_tg_on(data); + + if (!POWER_IS_ON(power) && POWER_IS_ON(data->lcd_power)) + tosa_lcd_tg_off(data); + + data->lcd_power = power; + return 0; +} + +static int tosa_lcd_get_power(struct lcd_device *lcd) +{ + struct tosa_lcd_data *data = lcd_get_data(lcd); + + return data->lcd_power; +} + +static struct lcd_ops tosa_lcd_ops = { + .set_power = tosa_lcd_set_power, + .get_power = tosa_lcd_get_power, +}; + +static int __devinit tosa_lcd_probe(struct spi_device *spi) +{ + int ret; + struct tosa_lcd_data *data; + + data = kzalloc(sizeof(struct tosa_lcd_data), GFP_KERNEL); + if (!data) + return -ENOMEM; + + /* + * bits_per_word cannot be configured in platform data + */ + spi->bits_per_word = 8; + + ret = spi_setup(spi); + if (ret < 0) + goto err_spi; + + data->spi = spi; + dev_set_drvdata(&spi->dev, data); + + ret = gpio_request(TOSA_GPIO_TG_ON, "tg #pwr"); + if (ret < 0) + goto err_gpio_tg; + + mdelay(60); + + ret = gpio_direction_output(TOSA_GPIO_TG_ON, 0); + if (ret < 0) + goto err_gpio_dir; + + mdelay(60); + tosa_lcd_tg_init(data); + + tosa_lcd_tg_on(data); + + data->lcd = lcd_device_register("tosa-lcd", &spi->dev, data, + &tosa_lcd_ops); + + if (IS_ERR(data->lcd)) { + ret = PTR_ERR(data->lcd); + data->lcd = NULL; + goto err_register; + } + + return 0; + +err_register: + tosa_lcd_tg_off(data); +err_gpio_dir: + gpio_free(TOSA_GPIO_TG_ON); +err_gpio_tg: + dev_set_drvdata(&spi->dev, NULL); +err_spi: + kfree(data); + return ret; +} + +static int __devexit tosa_lcd_remove(struct spi_device *spi) +{ + struct tosa_lcd_data *data = dev_get_drvdata(&spi->dev); + + lcd_device_unregister(data->lcd); + + if (data->i2c) + i2c_unregister_device(data->i2c); + + tosa_lcd_tg_off(data); + + gpio_free(TOSA_GPIO_TG_ON); + dev_set_drvdata(&spi->dev, NULL); + kfree(data); + + return 0; +} + +#ifdef CONFIG_PM +static int tosa_lcd_suspend(struct spi_device *spi, pm_message_t state) +{ + struct tosa_lcd_data *data = dev_get_drvdata(&spi->dev); + + tosa_lcd_tg_off(data); + + return 0; +} + +static int tosa_lcd_resume(struct spi_device *spi) +{ + struct tosa_lcd_data *data = dev_get_drvdata(&spi->dev); + + tosa_lcd_tg_init(data); + if (POWER_IS_ON(data->lcd_power)) + tosa_lcd_tg_on(data); + else + tosa_lcd_tg_off(data); + + return 0; +} +#else +#define tosa_lcd_suspend NULL +#define tosa_lcd_reume NULL +#endif + +static struct spi_driver tosa_lcd_driver = { + .driver = { + .name = "tosa-lcd", + .owner = THIS_MODULE, + }, + .probe = tosa_lcd_probe, + .remove = __devexit_p(tosa_lcd_remove), + .suspend = tosa_lcd_suspend, + .resume = tosa_lcd_resume, +}; + +static int __init tosa_lcd_init(void) +{ + return spi_register_driver(&tosa_lcd_driver); +} + +static void __exit tosa_lcd_exit(void) +{ + spi_unregister_driver(&tosa_lcd_driver); +} + +module_init(tosa_lcd_init); +module_exit(tosa_lcd_exit); + +MODULE_AUTHOR("Dmitry Baryshkov"); +MODULE_LICENSE("GPL v2"); +MODULE_DESCRIPTION("LCD/Backlight control for Sharp SL-6000 PDA"); + |