arch/arm/mach-pxa/asus620/asus620_lcd.c

   1 /*
   2  *  linux/arch/arm/mach-pxa/asus620_lcd.c
   3  *
   4  *  This program is free software; you can redistribute it and/or modify
   5  *  it under the terms of the GNU General Public License version 2 as
   6  *  published by the Free Software Foundation.
   7  *
   8  *  Copyright (c) 2003 Adam Turowski
   9  *  Copyright(C) 2004 Vitaliy Sardyko
  10  *
  11  *  2003-12-03: Adam Turowski
  12  *              initial code.
  13  *  2004-11-07: Vitaliy Sardyko
  14  *              updated to 2.6.7
  15  */
  16
  17 #include <linux/module.h>
  18 #include <linux/init.h>
  19 #include <linux/notifier.h>
  20 #include <linux/lcd.h>
  21 #include <linux/backlight.h>
  22
  23 #include <asm/mach-types.h>
  24 #include <asm/arch/pxa-regs.h>
  25 #include <asm/arch/asus620-init.h>
  26 #include <asm/arch/asus620-gpio.h>
  27 #include <linux/fb.h>
  28 #include <asm/arch/pxafb.h>
  29
  30 #define DEBUG 1
  31
  32
  33
  34 #if DEBUG
  35 #  define DPRINTK(fmt, args...) printk("%s: " fmt, __FUNCTION__ , ## args)
  36 #else
  37 #  define DPRINTK(fmt, args...)
  38 #endif
  39
  40
  41 static int asus620_lcd_set_power (struct lcd_device *lm, int setp)
  42 {
  43         return 0;
  44 }
  45
  46 static int asus620_lcd_get_power (struct lcd_device *lm)
  47 {
  48         return 0;
  49 }
  50 struct lcd_properties asus620_lcd_properties =
  51 {
  52         .owner = THIS_MODULE,
  53         .set_power = asus620_lcd_set_power,
  54         .get_power = asus620_lcd_get_power,
  55 };
  56 /* asus620: LCCR0: 0x003000f9   -- ENB | LDM | SFM | IUM | EFM | PAS | QDM | BM | OUM
  57          LCCR1: 0x15150cef      -- PPL=0xef, HSW=0x4, ELW=0xA, BLW=0x1A
  58          LCCR2: 0x06060d3f      -- BFW=0x0, EFW=0x30, VSW=0xC, LPP=0x13F
  59          LCCR3: 0x04700007      -- PCD=0x8, ACB=0x0, API=0x0, VSP, HSP, PCP, BPP=0x4 */
  60
  61 static struct pxafb_mach_info asus620_fb_info  = {
  62         .pixclock =     171521,
  63         .bpp =          16,
  64         .xres =         240,
  65         .yres =         320,
  66         .hsync_len =    4,
  67         .vsync_len =    4,
  68         .left_margin =  22,
  69         .upper_margin = 6,
  70         .right_margin = 22,
  71         .lower_margin = 6,
  72         .sync =         0,
  73         .lccr0 =        (LCCR0_LDM | LCCR0_SFM | LCCR0_IUM | LCCR0_EFM | LCCR0_PAS | LCCR0_QDM | LCCR0_BM | LCCR0_OUM),
  74         .lccr3 =        (LCCR3_HorSnchL | LCCR3_VrtSnchL | LCCR3_16BPP | LCCR3_PCP)
  75 };
  76
  77 static int asus620_backlight_set_power (struct backlight_device *bm, int on)
  78 {
  79         return 0;
  80 }
  81
  82 static int asus620_backlight_get_power (struct backlight_device *bm)
  83 {
  84         return 0;
  85 }
  86
  87 static struct backlight_properties asus620_backlight_properties =
  88 {
  89         .owner         = THIS_MODULE,
  90         .set_power     = asus620_backlight_set_power,
  91         .get_power     = asus620_backlight_get_power,
  92 };
  93
  94 static struct lcd_device *pxafb_lcd_device;
  95 static struct backlight_device *pxafb_backlight_device;
  96
  97 int asus620_lcd_init (void)
  98 {
  99         int ret = 0;
 100
 101         if (!machine_is_a620 ())
 102                 return -ENODEV;
 103
 104         set_pxa_fb_info (&asus620_fb_info);
 105
 106         pxafb_lcd_device = lcd_device_register("pxafb", NULL, &asus620_lcd_properties);
 107         if (IS_ERR (pxafb_lcd_device)) {
 108                 DPRINTK(" LCD device doesn't registered, booting failed !\n");
 109                 return ret;
 110         }
 111
 112         pxafb_backlight_device = backlight_device_register("pxafb", NULL,
 113                                                            &asus620_backlight_properties);
 114
 115         return ret;
 116 }
 117
 118
 119 static void asus620_lcd_exit (void)
 120 {
 121         lcd_device_unregister (pxafb_lcd_device);
 122         backlight_device_unregister (pxafb_backlight_device);
 123 }
 124
 125 module_init(asus620_lcd_init);
 126 module_exit(asus620_lcd_exit);
 127
 128 MODULE_AUTHOR("Adam Turowski");
 129 MODULE_DESCRIPTION("LCD driver for Asus 620");
 130 MODULE_LICENSE("GPL");