projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 987132bb PM |
1 | /* |
| 2 | * Backlight control code for Sharp Zaurus SL-5500 | |
| 3 | * | |
| 4 | * Copyright 2005 John Lenz <lenz@cs.wisc.edu> | |
| 5 | * Maintainer: Pavel Machek <pavel@suse.cz> (unless John wants to :-) | |
| 6 | * GPL v2 | |
| 7 | * | |
| 8 | * This driver assumes single CPU. That's okay, because collie is | |
| 9 | * slightly old hardware, and noone is going to retrofit second CPU to | |
| 10 | * old PDA. | |
| 11 | */ | |
| 12 | ||
| 13 | /* LCD power functions */ | |
| 14 | #include <linux/config.h> | |
| 15 | #include <linux/module.h> | |
| 16 | #include <linux/init.h> | |
| 17 | #include <linux/delay.h> | |
| 18 | #include <linux/device.h> | |
| 19 | #include <linux/interrupt.h> | |
| 20 | ||
| 21 | #include <asm/hardware/locomo.h> | |
| 22 | #include <asm/irq.h> | |
| 23 | ||
| 24 | #ifdef CONFIG_SA1100_COLLIE | |
| 25 | #include <asm/arch/collie.h> | |
| 26 | #else | |
| 27 | #include <asm/arch/poodle.h> | |
| 28 | #endif | |
| 29 | ||
| 30 | extern void (*sa1100fb_lcd_power)(int on); | |
| 31 | ||
| 32 | static struct locomo_dev *locomolcd_dev; | |
| 33 | ||
| 34 | static void locomolcd_on(int comadj) | |
| 35 | { | |
| 36 | locomo_gpio_set_dir(locomolcd_dev, LOCOMO_GPIO_LCD_VSHA_ON, 0); | |
| 37 | locomo_gpio_write(locomolcd_dev, LOCOMO_GPIO_LCD_VSHA_ON, 1); | |
| 38 | mdelay(2); | |
| 39 | ||
| 40 | locomo_gpio_set_dir(locomolcd_dev, LOCOMO_GPIO_LCD_VSHD_ON, 0); | |
| 41 | locomo_gpio_write(locomolcd_dev, LOCOMO_GPIO_LCD_VSHD_ON, 1); | |
| 42 | mdelay(2); | |
| 43 | ||
| 44 | locomo_m62332_senddata(locomolcd_dev, comadj, 0); | |
| 45 | mdelay(5); | |
| 46 | ||
| 47 | locomo_gpio_set_dir(locomolcd_dev, LOCOMO_GPIO_LCD_VEE_ON, 0); | |
| 48 | locomo_gpio_write(locomolcd_dev, LOCOMO_GPIO_LCD_VEE_ON, 1); | |
| 49 | mdelay(10); | |
| 50 | ||
| 51 | /* TFTCRST | CPSOUT=0 | CPSEN */ | |
| 52 | locomo_writel(0x01, locomolcd_dev->mapbase + LOCOMO_TC); | |
| 53 | ||
| 54 | /* Set CPSD */ | |
| 55 | locomo_writel(6, locomolcd_dev->mapbase + LOCOMO_CPSD); | |
| 56 | ||
| 57 | /* TFTCRST | CPSOUT=0 | CPSEN */ | |
| 58 | locomo_writel((0x04 | 0x01), locomolcd_dev->mapbase + LOCOMO_TC); | |
| 59 | mdelay(10); | |
| 60 | ||
| 61 | locomo_gpio_set_dir(locomolcd_dev, LOCOMO_GPIO_LCD_MOD, 0); | |
| 62 | locomo_gpio_write(locomolcd_dev, LOCOMO_GPIO_LCD_MOD, 1); | |
| 63 | } | |
| 64 | ||
| 65 | static void locomolcd_off(int comadj) | |
| 66 | { | |
| 67 | /* TFTCRST=1 | CPSOUT=1 | CPSEN = 0 */ | |
| 68 | locomo_writel(0x06, locomolcd_dev->mapbase + LOCOMO_TC); | |
| 69 | mdelay(1); | |
| 70 | ||
| 71 | locomo_gpio_write(locomolcd_dev, LOCOMO_GPIO_LCD_VSHA_ON, 0); | |
| 72 | mdelay(110); | |
| 73 | ||
| 74 | locomo_gpio_write(locomolcd_dev, LOCOMO_GPIO_LCD_VEE_ON, 0); | |
| 75 | mdelay(700); | |
| 76 | ||
| 77 | /* TFTCRST=0 | CPSOUT=0 | CPSEN = 0 */ | |
| 78 | locomo_writel(0, locomolcd_dev->mapbase + LOCOMO_TC); | |
| 79 | locomo_gpio_write(locomolcd_dev, LOCOMO_GPIO_LCD_MOD, 0); | |
| 80 | locomo_gpio_write(locomolcd_dev, LOCOMO_GPIO_LCD_VSHD_ON, 0); | |
| 81 | } | |
| 82 | ||
| 83 | void locomolcd_power(int on) | |
| 84 | { | |
| 85 | int comadj = 118; | |
| 86 | unsigned long flags; | |
| 87 | ||
| 88 | local_irq_save(flags); | |
| 89 | ||
| 90 | if (!locomolcd_dev) { | |
| 91 | local_irq_restore(flags); | |
| 92 | return; | |
| 93 | } | |
| 94 | ||
| 95 | /* read comadj */ | |
| 96 | #ifdef CONFIG_MACH_POODLE | |
| 97 | comadj = 118; | |
| 98 | #else | |
| 99 | comadj = 128; | |
| 100 | #endif | |
| 101 | ||
| 102 | if (on) | |
| 103 | locomolcd_on(comadj); | |
| 104 | else | |
| 105 | locomolcd_off(comadj); | |
| 106 | ||
| 107 | local_irq_restore(flags); | |
| 108 | } | |
| 109 | EXPORT_SYMBOL(locomolcd_power); | |
| 110 | ||
| 111 | static int poodle_lcd_probe(struct locomo_dev *dev) | |
| 112 | { | |
| 113 | unsigned long flags; | |
| 114 | ||
| 115 | local_irq_save(flags); | |
| 116 | locomolcd_dev = dev; | |
| 117 | ||
| 118 | /* the poodle_lcd_power function is called for the first time | |
| 119 | * from fs_initcall, which is before locomo is activated. | |
| 120 | * We need to recall poodle_lcd_power here*/ | |
| 121 | #ifdef CONFIG_MACH_POODLE | |
| 122 | locomolcd_power(1); | |
| 123 | #endif | |
| 124 | local_irq_restore(flags); | |
| 125 | return 0; | |
| 126 | } | |
| 127 | ||
| 128 | static int poodle_lcd_remove(struct locomo_dev *dev) | |
| 129 | { | |
| 130 | unsigned long flags; | |
| 131 | local_irq_save(flags); | |
| 132 | locomolcd_dev = NULL; | |
| 133 | local_irq_restore(flags); | |
| 134 | return 0; | |
| 135 | } | |
| 136 | ||
| 137 | static struct locomo_driver poodle_lcd_driver = { | |
| 138 | .drv = { | |
| 139 | .name = "locomo-backlight", | |
| 140 | }, | |
| 141 | .devid = LOCOMO_DEVID_BACKLIGHT, | |
| 142 | .probe = poodle_lcd_probe, | |
| 143 | .remove = poodle_lcd_remove, | |
| 144 | }; | |
| 145 | ||
| 146 | static int __init poodle_lcd_init(void) | |
| 147 | { | |
| 148 | int ret = locomo_driver_register(&poodle_lcd_driver); | |
| 149 | if (ret) return ret; | |
| 150 | ||
| 151 | #ifdef CONFIG_SA1100_COLLIE | |
| 152 | sa1100fb_lcd_power = locomolcd_power; | |
| 153 | #endif | |
| 154 | return 0; | |
| 155 | } | |
| 156 | device_initcall(poodle_lcd_init); | |
| 157 |