arch/arm/mach-pxa/aximx30/aximx30_lcd.c

   1 /*
   2  * LCD driver for Dell Axim X30
   3  *
   4  * Authors: Giuseppe Zompatori <giuseppe_zompatori@yahoo.it>
   5  *
   6  * based on previous work, see below:
   7  *
   8  * Machine initialization for Dell Axim X3
   9  *
  10  * Authors: Andrew Zabolotny <zap@homelink.ru>
  11  *
  12  * For now this is mostly a placeholder file; since I don't own an Axim X3
  13  * it is supposed the project to be overtaken by somebody else. The code
  14  * in here is *supposed* to work so that you can at least boot to the command
  15  * line, but there is no guarantee.
  16  *
  17  * This file is subject to the terms and conditions of the GNU General Public
  18  * License.  See the file COPYING in the main directory of this archive for
  19  * more details.
  20  */
  21
  22 #include <linux/module.h>
  23 #include <linux/init.h>
  24 #include <linux/notifier.h>
  25 #include <linux/lcd.h>
  26 #include <linux/backlight.h>
  27 #include <linux/err.h>
  28
  29 #include <asm/arch/aximx3-init.h>
  30 #include <asm/arch/aximx3-gpio.h>
  31 #include <linux/fb.h>
  32 #include <asm/mach-types.h>
  33 #include "asm/arch/pxa-regs.h"
  34 #include "asm/arch/pxafb.h"
  35
  36 static int aximx30_lcd_set_power (struct lcd_device *lm, int setp)
  37 {
  38         return 0;
  39 }
  40
  41 static int aximx30_lcd_get_power (struct lcd_device *lm)
  42 {
  43         return 0;
  44 }
  45
  46 static struct pxafb_mach_info aximx30_fb_info =
  47 {
  48         .pixclock =     0,   // --
  49         .bpp =          16,  // ??
  50         .xres =         240, // PPL + 1
  51         .yres =         320, // LPP + 1
  52         .hsync_len =    20,  // HSW + 1
  53         .vsync_len =    4,   // VSW + 1
  54         .left_margin =  59,  // BLW + 1
  55         .upper_margin = 4,   // BFW
  56         .right_margin = 16,  // ELW + 1
  57         .lower_margin = 0,   // EFW
  58         .sync =         0,   // --
  59         .lccr0 = 0x003008f9, // yes that's ugly, but it's due a limitation of the
  60         .lccr3 = 0x04900008 // pxafb driver assuming pxa25x fbs...
  61 };
  62
  63 struct lcd_properties aximx30_lcd_properties =
  64 {
  65         .owner = THIS_MODULE,
  66         .set_power = aximx30_lcd_set_power,
  67         .get_power = aximx30_lcd_get_power,
  68         /* @@ more here @@ */
  69 };
  70
  71 static int aximx30_backlight_set_power (struct backlight_device *bm, int on)
  72 {
  73         return 0;
  74 }
  75
  76 static int aximx30_backlight_get_power (struct backlight_device *bm)
  77 {
  78         return 0;
  79 }
  80
  81 static struct backlight_properties aximx30_backlight_properties =
  82 {
  83         .owner         = THIS_MODULE,
  84         .set_power     = aximx30_backlight_set_power,
  85         .get_power     = aximx30_backlight_get_power,
  86 };
  87
  88 static struct lcd_device *pxafb_lcd_device;
  89 static struct backlight_device *pxafb_backlight_device;
  90
  91 static int __init
  92 aximx30_lcd_init (void)
  93 {
  94 //      if (! machine_is_x30 ())
  95 //              return -ENODEV;
  96
  97         set_pxa_fb_info(&aximx30_fb_info);
  98         pxafb_lcd_device = lcd_device_register("pxafb", NULL, &aximx30_lcd_properties);
  99 //      if (IS_ERR (pxafb_lcd_device))
 100 //              return PTR_ERR (pxafb_lcd_device);
 101         pxafb_backlight_device = backlight_device_register("pxafb", NULL,
 102                 &aximx30_backlight_properties);
 103 //      if (IS_ERR (pxafb_backlight_device)) {
 104 //              lcd_device_unregister (pxafb_lcd_device);
 105 //              return PTR_ERR (pxafb_backlight_device);
 106 //      }
 107
 108         return 0;
 109 }
 110
 111 static void __exit
 112 aximx30_lcd_exit (void)
 113 {
 114         lcd_device_unregister (pxafb_lcd_device);
 115         backlight_device_unregister (pxafb_backlight_device);
 116 }
 117
 118 module_init (aximx30_lcd_init);
 119 module_exit (aximx30_lcd_exit);
 120
 121 MODULE_AUTHOR("Giuseppe Zompatori <giuseppe_zompatori@yahoo.it>");
 122 MODULE_DESCRIPTION("Dell Axim X30 Core frambuffer driver");
 123 MODULE_LICENSE("GPL");
 124