release/src-rt-6.x.4708/linux/linux-2.6.36/arch/arm/mach-sa1100/h3100.c

   1 /*
   2  * Support for Compaq iPAQ H3100 handheld computer
   3  *
   4  * Copyright (c) 2000,1 Compaq Computer Corporation. (Author: Jamey Hicks)
   5  * Copyright (c) 2009 Dmitry Artamonow <mad_soft@inbox.ru>
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License version 2 as
   9  * published by the Free Software Foundation.
  10  *
  11  */
  12
  13 #include <linux/init.h>
  14 #include <linux/kernel.h>
  15 #include <linux/gpio.h>
  16
  17 #include <asm/mach-types.h>
  18 #include <asm/mach/arch.h>
  19 #include <asm/mach/irda.h>
  20
  21 #include <mach/h3xxx.h>
  22
  23 #include "generic.h"
  24
  25 /*
  26  * helper for sa1100fb
  27  */
  28 static void h3100_lcd_power(int enable)
  29 {
  30         if (!gpio_request(H3XXX_EGPIO_LCD_ON, "LCD ON")) {
  31                 gpio_set_value(H3100_GPIO_LCD_3V_ON, enable);
  32                 gpio_direction_output(H3XXX_EGPIO_LCD_ON, enable);
  33                 gpio_free(H3XXX_EGPIO_LCD_ON);
  34         } else {
  35                 pr_err("%s: can't request H3XXX_EGPIO_LCD_ON\n", __func__);
  36         }
  37 }
  38
  39
  40 static void __init h3100_map_io(void)
  41 {
  42         h3xxx_map_io();
  43
  44         sa1100fb_lcd_power = h3100_lcd_power;
  45
  46         /* Older bootldrs put GPIO2-9 in alternate mode on the
  47            assumption that they are used for video */
  48         GAFR &= ~0x000001fb;
  49 }
  50
  51 /*
  52  * This turns the IRDA power on or off on the Compaq H3100
  53  */
  54 static int h3100_irda_set_power(struct device *dev, unsigned int state)
  55 {
  56         gpio_set_value(H3100_GPIO_IR_ON, state);
  57         return 0;
  58 }
  59
  60 static void h3100_irda_set_speed(struct device *dev, unsigned int speed)
  61 {
  62         gpio_set_value(H3100_GPIO_IR_FSEL, !(speed < 4000000));
  63 }
  64
  65 static struct irda_platform_data h3100_irda_data = {
  66         .set_power      = h3100_irda_set_power,
  67         .set_speed      = h3100_irda_set_speed,
  68 };
  69
  70 static struct gpio_default_state h3100_default_gpio[] = {
  71         { H3100_GPIO_IR_ON,     GPIO_MODE_OUT0, "IrDA power" },
  72         { H3100_GPIO_IR_FSEL,   GPIO_MODE_OUT0, "IrDA fsel" },
  73         { H3XXX_GPIO_COM_DCD,   GPIO_MODE_IN,   "COM DCD" },
  74         { H3XXX_GPIO_COM_CTS,   GPIO_MODE_IN,   "COM CTS" },
  75         { H3XXX_GPIO_COM_RTS,   GPIO_MODE_OUT0, "COM RTS" },
  76         { H3100_GPIO_LCD_3V_ON, GPIO_MODE_OUT0, "LCD 3v" },
  77 };
  78
  79 static void __init h3100_mach_init(void)
  80 {
  81         h3xxx_init_gpio(h3100_default_gpio, ARRAY_SIZE(h3100_default_gpio));
  82         h3xxx_mach_init();
  83         sa11x0_register_irda(&h3100_irda_data);
  84 }
  85
  86 MACHINE_START(H3100, "Compaq iPAQ H3100")
  87         .phys_io        = 0x80000000,
  88         .io_pg_offst    = ((0xf8000000) >> 18) & 0xfffc,
  89         .boot_params    = 0xc0000100,
  90         .map_io         = h3100_map_io,
  91         .init_irq       = sa1100_init_irq,
  92         .timer          = &sa1100_timer,
  93         .init_machine   = h3100_mach_init,
  94 MACHINE_END