drivers/pcmcia/pxa2xx_palmtx.c

   1 /*
   2  * linux/drivers/pcmcia/pxa2xx_palmtx.c
   3  *
   4  * Driver for Palm T|X PCMCIA
   5  *
   6  * Copyright (C) 2007-2008 Marek Vasut <marek.vasut@gmail.com>
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License version 2 as
  10  * published by the Free Software Foundation.
  11  *
  12  */
  13
  14 #include <linux/module.h>
  15 #include <linux/platform_device.h>
  16
  17 #include <asm/mach-types.h>
  18
  19 #include <mach/gpio.h>
  20 #include <mach/palmtx.h>
  21
  22 #include "soc_common.h"
  23
  24 static int palmtx_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
  25 {
  26         skt->irq = IRQ_GPIO(GPIO_NR_PALMTX_PCMCIA_READY);
  27         return 0;
  28 }
  29
  30 static void palmtx_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt)
  31 {
  32 }
  33
  34 static void palmtx_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
  35                                         struct pcmcia_state *state)
  36 {
  37         state->detect = 1; /* always inserted */
  38         state->ready  = !!gpio_get_value(GPIO_NR_PALMTX_PCMCIA_READY);
  39         state->bvd1   = 1;
  40         state->bvd2   = 1;
  41         state->wrprot = 0;
  42         state->vs_3v  = 1;
  43         state->vs_Xv  = 0;
  44 }
  45
  46 static int
  47 palmtx_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
  48                                 const socket_state_t *state)
  49 {
  50         gpio_set_value(GPIO_NR_PALMTX_PCMCIA_POWER1, 1);
  51         gpio_set_value(GPIO_NR_PALMTX_PCMCIA_POWER2, 1);
  52         gpio_set_value(GPIO_NR_PALMTX_PCMCIA_RESET,
  53                         !!(state->flags & SS_RESET));
  54
  55         return 0;
  56 }
  57
  58 static void palmtx_pcmcia_socket_init(struct soc_pcmcia_socket *skt)
  59 {
  60 }
  61
  62 static void palmtx_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt)
  63 {
  64 }
  65
  66 static struct pcmcia_low_level palmtx_pcmcia_ops = {
  67         .owner                  = THIS_MODULE,
  68
  69         .first                  = 0,
  70         .nr                     = 1,
  71
  72         .hw_init                = palmtx_pcmcia_hw_init,
  73         .hw_shutdown            = palmtx_pcmcia_hw_shutdown,
  74
  75         .socket_state           = palmtx_pcmcia_socket_state,
  76         .configure_socket       = palmtx_pcmcia_configure_socket,
  77
  78         .socket_init            = palmtx_pcmcia_socket_init,
  79         .socket_suspend         = palmtx_pcmcia_socket_suspend,
  80 };
  81
  82 static struct platform_device *palmtx_pcmcia_device;
  83
  84 static int __init palmtx_pcmcia_init(void)
  85 {
  86         int ret;
  87
  88         if (!machine_is_palmtx())
  89                 return -ENODEV;
  90
  91         palmtx_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1);
  92         if (!palmtx_pcmcia_device)
  93                 return -ENOMEM;
  94
  95         ret = platform_device_add_data(palmtx_pcmcia_device, &palmtx_pcmcia_ops,
  96                                         sizeof(palmtx_pcmcia_ops));
  97
  98         if (!ret)
  99                 ret = platform_device_add(palmtx_pcmcia_device);
 100
 101         if (ret)
 102                 platform_device_put(palmtx_pcmcia_device);
 103
 104         return ret;
 105 }
 106
 107 static void __exit palmtx_pcmcia_exit(void)
 108 {
 109         platform_device_unregister(palmtx_pcmcia_device);
 110 }
 111
 112 fs_initcall(palmtx_pcmcia_init);
 113 module_exit(palmtx_pcmcia_exit);
 114
 115 MODULE_AUTHOR("Marek Vasut <marek.vasut@gmail.com>");
 116 MODULE_DESCRIPTION("PCMCIA support for Palm T|X");
 117 MODULE_ALIAS("platform:pxa2xx-pcmcia");
 118 MODULE_LICENSE("GPL");