diff options
Diffstat (limited to 'target/linux/xburst/files-2.6.32/drivers/video/backlight/gpm940b0.c')
-rw-r--r-- | target/linux/xburst/files-2.6.32/drivers/video/backlight/gpm940b0.c | 255 |
1 files changed, 0 insertions, 255 deletions
diff --git a/target/linux/xburst/files-2.6.32/drivers/video/backlight/gpm940b0.c b/target/linux/xburst/files-2.6.32/drivers/video/backlight/gpm940b0.c deleted file mode 100644 index 5cfb12f0e..000000000 --- a/target/linux/xburst/files-2.6.32/drivers/video/backlight/gpm940b0.c +++ /dev/null @@ -1,255 +0,0 @@ -/* - * Copyright (C) 2009, Lars-Peter Clausen <lars@metafoo.de> - * JZ4720/JZ4740 SoC LCD framebuffer driver - * - * This program is free software; you can redistribute it and/or modify it - * under the terms of the GNU General Public License as published by the - * Free Software Foundation; either version 2 of the License, or (at your - * option) any later version. - * - * You should have received a copy of the GNU General Public License along - * with this program; if not, write to the Free Software Foundation, Inc., - * 675 Mass Ave, Cambridge, MA 02139, USA. - * - */ - -#include <linux/module.h> -#include <linux/spi/spi.h> -#include <linux/lcd.h> -#include <linux/backlight.h> -#include <linux/delay.h> - -struct gpm940b0 { - struct spi_device *spi; - struct lcd_device *lcd; - struct backlight_device *bl; - unsigned enabled:1; -}; - -static int gpm940b0_write_reg(struct spi_device *spi, uint8_t reg, - uint8_t data) -{ - uint8_t buf[2]; - buf[0] = ((reg & 0x40) << 1) | (reg & 0x3f); - buf[1] = data; - - return spi_write(spi, buf, sizeof(buf)); -} - -static void gpm940b0_power_disable(struct gpm940b0 *gpm940b0) -{ - int ret = gpm940b0_write_reg(gpm940b0->spi, 0x5, 0xc6) ; - if (ret < 0) - printk("Failed to disable power: %d\n", ret); -} - -static void gpm940b0_power_enable(struct gpm940b0 *gpm940b0) -{ - gpm940b0_write_reg(gpm940b0->spi, 0x5, 0xc7); -} - - -static int gpm940b0_set_power(struct lcd_device *lcd, int power) -{ - struct gpm940b0 *gpm940b0 = lcd_get_data(lcd); - - switch (power) { - case FB_BLANK_UNBLANK: - mdelay(20); - gpm940b0->enabled = 1; - gpm940b0_power_enable(gpm940b0); - break; - default: - gpm940b0->enabled = 0; - gpm940b0_power_disable(gpm940b0); - mdelay(20); - break; - } - return 0; -} - -static int gpm940b0_set_contrast(struct lcd_device *lcd, int contrast) -{ - struct gpm940b0 *gpm940b0 = lcd_get_data(lcd); - gpm940b0_write_reg(gpm940b0->spi, 0x0d, contrast); - return 0; -} - -static int gpm940b0_set_mode(struct lcd_device *lcd, struct fb_videomode *mode) -{ - if (mode->xres != 320 && mode->yres != 240) - return -EINVAL; - - return 0; -} - -/* -int gpm940b0_bl_update_status(struct backlight_device *bl) -{ - struct gpm940b0 *gpm940b0 = bl_get_data(bl); - - gpm940b0->reg5 &= ~0x38; - gpm940b0->reg5 |= ((bl->props.brightness << 3) & 0x38); - - gpm940b0_write_reg(gpm940b0->spi, 0x5, gpm940b0->reg5); - - return 0; -}*/ - -static ssize_t reg_write(struct device *dev, struct device_attribute *attr, - const char *buf, size_t count) -{ - char *buf2; - uint32_t reg = simple_strtoul(buf, &buf2, 10); - uint32_t val = simple_strtoul(buf2 + 1, NULL, 10); - struct gpm940b0 *gpm940b0 = dev_get_drvdata(dev); - - if (reg < 0 || val < 0) - return -EINVAL; - - gpm940b0_write_reg(gpm940b0->spi, reg, val); - return count; -} - -static DEVICE_ATTR(reg, 0644, NULL, reg_write); - -static struct lcd_ops gpm940b0_lcd_ops = { - .set_power = gpm940b0_set_power, - .set_contrast = gpm940b0_set_contrast, - .set_mode = gpm940b0_set_mode, -}; - -#if 0 -static struct backlight_ops gpm940b0_bl_ops = { -/* .get_brightness = gpm940b0_bl_get_brightness,*/ - .update_status = gpm940b0_bl_update_status, -}; -#endif - -static int __devinit gpm940b0_probe(struct spi_device *spi) -{ - int ret; - struct gpm940b0 *gpm940b0; - - gpm940b0 = kmalloc(sizeof(*gpm940b0), GFP_KERNEL); - - spi->bits_per_word = 8; - - ret = spi_setup(spi); - if (ret) { - dev_err(&spi->dev, "Failed to setup spi\n"); - goto err_free_gpm940b0; - } - - gpm940b0->spi = spi; - - gpm940b0->lcd = lcd_device_register("gpm940b0-lcd", &spi->dev, gpm940b0, - &gpm940b0_lcd_ops); - - if (IS_ERR(gpm940b0->lcd)) { - ret = PTR_ERR(gpm940b0->lcd); - dev_err(&spi->dev, "Failed to register lcd device: %d\n", ret); - goto err_free_gpm940b0; - } - - gpm940b0->lcd->props.max_contrast = 255; - -#if 0 - gpm940b0->bl = backlight_device_register("gpm940b0-bl", &spi->dev, gpm940b0, - &gpm940b0_bl_ops); - - if (IS_ERR(gpm940b0->bl)) { - ret = PTR_ERR(gpm940b0->bl); - dev_err(&spi->dev, "Failed to register backlight device: %d\n", ret); - gpm940b0->bl = NULL; - } else { - gpm940b0->bl->props.max_brightness = 8; - gpm940b0->bl->props.brightness = 0; - gpm940b0->bl->props.power = FB_BLANK_UNBLANK; - } -#endif - - ret = device_create_file(&spi->dev, &dev_attr_reg); - if (ret) - goto err_unregister_lcd; - - gpm940b0->enabled = 1; - dev_set_drvdata(&spi->dev, gpm940b0); - - gpm940b0_write_reg(spi, 0x13, 0x01); - gpm940b0_write_reg(spi, 0x5, 0xc7); - return 0; -err_unregister_lcd: - lcd_device_unregister(gpm940b0->lcd); -err_free_gpm940b0: - kfree(gpm940b0); - return ret; -} - -static int __devexit gpm940b0_remove(struct spi_device *spi) -{ - struct gpm940b0 *gpm940b0 = spi_get_drvdata(spi); -#if 0 - if (gpm940b0->bl) - backlight_device_unregister(gpm940b0->bl); -#endif - - lcd_device_unregister(gpm940b0->lcd); - - spi_set_drvdata(spi, NULL); - kfree(gpm940b0); - return 0; -} - -#ifdef CONFIG_PM - -static int gpm940b0_suspend(struct spi_device *spi, pm_message_t state) -{ - struct gpm940b0 *gpm940b0 = spi_get_drvdata(spi); - if (gpm940b0->enabled) { - gpm940b0_power_disable(gpm940b0); - mdelay(10); - } - return 0; -} - -static int gpm940b0_resume(struct spi_device *spi) -{ - struct gpm940b0 *gpm940b0 = spi_get_drvdata(spi); - if (gpm940b0->enabled) - gpm940b0_power_enable(gpm940b0); - return 0; -} - -#else -#define gpm940b0_suspend NULL -#define gpm940b0_resume NULL -#endif - -static struct spi_driver gpm940b0_driver = { - .driver = { - .name = "gpm940b0", - .owner = THIS_MODULE, - }, - .probe = gpm940b0_probe, - .remove = __devexit_p(gpm940b0_remove), - .suspend = gpm940b0_suspend, - .resume = gpm940b0_resume, -}; - -static int __init gpm940b0_init(void) -{ - return spi_register_driver(&gpm940b0_driver); -} -module_init(gpm940b0_init); - -static void __exit gpm940b0_exit(void) -{ - return spi_unregister_driver(&gpm940b0_driver); -} -module_exit(gpm940b0_exit) - -MODULE_AUTHOR("Lars-Peter Clausen"); -MODULE_LICENSE("GPL v2"); -MODULE_DESCRIPTION("LCD and backlight controll for Giantplus GPM940B0"); -MODULE_ALIAS("spi:gpm940b0"); 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