arch/arm/mach-sa1100/h3600_lcd.c

   1 /*
   2  * Hardware definitions for Compaq iPAQ H36xx Handheld Computers
   3  *
   4  * Use consistent with the GNU GPL is permitted,
   5  * provided that this copyright notice is
   6  * preserved in its entirety in all copies and derived works.
   7  *
   8  * Author: Alessandro Gardich.
   9  *
  10  * History : based on 2.4 drivers.
  11  *
  12  * 2005-11-xx   Alessandro Gardich, let start.
  13  *
  14  */
  15
  16
  17 #include <linux/module.h>
  18 #include <linux/init.h>
  19 #include <linux/kernel.h>
  20 #include <linux/tty.h>
  21 #include <linux/sched.h>
  22 #include <linux/delay.h>
  23 #include <linux/pm.h>
  24 #include <linux/lcd.h>
  25 #include <linux/backlight.h>
  26 #include <linux/fb.h>
  27 #include <linux/err.h>
  28 #include <linux/platform_device.h>
  29
  30 #include <asm/mach-types.h>
  31 #include <asm/hardware.h>
  32 #include <asm/setup.h>
  33
  34 #include <asm/mach/arch.h>
  35 #include <asm/arch/h3600.h>
  36 #include <asm/hardware/ipaq-ops.h>
  37
  38 #include <../arch/arm/mach-sa1100/generic.h>
  39
  40 static int h3600_lcd_power;
  41
  42 /*
  43  * helper for sa1100fb
  44  */
  45 static void __h3600_lcd_power(int enable )
  46 {
  47         assign_ipaqsa_egpio(IPAQ_EGPIO_LCD_POWER, enable);
  48         assign_ipaqsa_egpio(IPAQ_EGPIO_LCD_ENABLE, enable);
  49
  50         return;
  51 }
  52
  53 /*--- sa1100fb END ---*/
  54
  55
  56 static int h3600_lcd_set_power( struct lcd_device *lm, int level )
  57 {
  58         h3600_lcd_power = level;
  59
  60         if (level < 1) {
  61                 assign_ipaqsa_egpio(IPAQ_EGPIO_LCD_POWER, 1);
  62         } else {
  63                 assign_ipaqsa_egpio(IPAQ_EGPIO_LCD_POWER, 0);
  64         }
  65
  66         if (level < 4) {
  67                 assign_ipaqsa_egpio(IPAQ_EGPIO_LCD_ENABLE, 1);
  68         } else {
  69                 assign_ipaqsa_egpio(IPAQ_EGPIO_LCD_ENABLE, 0);
  70         }
  71
  72         return 0;
  73 }
  74
  75 static int h3600_lcd_get_power( struct lcd_device *lm)
  76 {
  77         return h3600_lcd_power;
  78 }
  79
  80
  81 static struct lcd_properties h3600_lcd_properties = {
  82         .owner          = THIS_MODULE,
  83         .get_power      = h3600_lcd_get_power,
  84         .set_power      = h3600_lcd_set_power,
  85 };
  86
  87 static struct lcd_device *h3600_lcd_device;
  88
  89 static int h3600_fp_probe (struct device *dev)
  90 {
  91         if (! machine_is_h3600 ())
  92                 return -ENODEV;
  93
  94         h3600_lcd_device = lcd_device_register("sa1100fb", NULL, &h3600_lcd_properties);
  95         if (IS_ERR (h3600_lcd_device))
  96                 return PTR_ERR (h3600_lcd_device);
  97
  98         h3600_lcd_set_power (h3600_lcd_device, 0);
  99
 100         sa1100fb_lcd_power = __h3600_lcd_power;
 101
 102         return 0;
 103 }
 104
 105 static int h3600_fp_remove (struct device *dev)
 106 {
 107         h3600_lcd_set_power(h3600_lcd_device, 4);
 108         lcd_device_unregister (h3600_lcd_device);
 109
 110         sa1100fb_lcd_power = NULL;
 111
 112         return 0;
 113 }
 114
 115 static int h3600_fp_suspend ( struct device *dev, pm_message_t msg)
 116 {
 117         h3600_lcd_set_power(h3600_lcd_device, 4);
 118         return 0;
 119 }
 120
 121 static int h3600_fp_resume (struct device *dev)
 122 {
 123         h3600_lcd_set_power(h3600_lcd_device, 0);
 124         return 0;
 125 }
 126
 127 struct device_driver h3600_fp_driver = {
 128         .name     = "h3600-lcd",
 129         .bus      = &platform_bus_type,
 130         .probe    = h3600_fp_probe,
 131         .remove   = h3600_fp_remove,
 132         .suspend  = h3600_fp_suspend,
 133         .resume   = h3600_fp_resume,
 134 };
 135
 136 static int __init h3600_fp_init(void)
 137 {
 138         int rc;
 139
 140         if (!machine_is_h3600())
 141                 return -ENODEV;
 142
 143         rc = driver_register(&h3600_fp_driver);
 144
 145         return rc;
 146 }
 147
 148 static void __exit h3600_fp_exit(void)
 149 {
 150         lcd_device_unregister(h3600_lcd_device);
 151         driver_unregister(&h3600_fp_driver);
 152 }
 153
 154 module_init (h3600_fp_init);
 155 module_exit (h3600_fp_exit);
 156
 157 MODULE_LICENSE("GPL");
 158 MODULE_AUTHOR("Alessandro Gardich <gremlin-4KDpiRHFOM2onA0d6jMUrA@public.gmane.org>");
 159 MODULE_DESCRIPTION("iPAQ h3600 LCD driver");
 160