drivers/pcmcia/pxa2xx_palmld.c

   1 /*
   2  * linux/drivers/pcmcia/pxa2xx_palmld.c
   3  *
   4  * Driver for Palm LifeDrive PCMCIA
   5  *
   6  * Copyright (C) 2006 Alex Osborne <ato@meshy.org>
   7  * Copyright (C) 2007-2008 Marek Vasut <marek.vasut@gmail.com>
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License version 2 as
  11  * published by the Free Software Foundation.
  12  *
  13  */
  14
  15 #include <linux/module.h>
  16 #include <linux/platform_device.h>
  17 #include <linux/gpio.h>
  18
  19 #include <asm/mach-types.h>
  20 #include <mach/palmld.h>
  21 #include "soc_common.h"
  22
  23 static int palmld_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
  24 {
  25         int ret;
  26
  27         ret = gpio_request(GPIO_NR_PALMLD_PCMCIA_POWER, "PCMCIA PWR");
  28         if (ret)
  29                 goto err1;
  30         ret = gpio_direction_output(GPIO_NR_PALMLD_PCMCIA_POWER, 0);
  31         if (ret)
  32                 goto err2;
  33
  34         ret = gpio_request(GPIO_NR_PALMLD_PCMCIA_RESET, "PCMCIA RST");
  35         if (ret)
  36                 goto err2;
  37         ret = gpio_direction_output(GPIO_NR_PALMLD_PCMCIA_RESET, 1);
  38         if (ret)
  39                 goto err3;
  40
  41         ret = gpio_request(GPIO_NR_PALMLD_PCMCIA_READY, "PCMCIA RDY");
  42         if (ret)
  43                 goto err3;
  44         ret = gpio_direction_input(GPIO_NR_PALMLD_PCMCIA_READY);
  45         if (ret)
  46                 goto err4;
  47
  48         skt->irq = IRQ_GPIO(GPIO_NR_PALMLD_PCMCIA_READY);
  49         return 0;
  50
  51 err4:
  52         gpio_free(GPIO_NR_PALMLD_PCMCIA_READY);
  53 err3:
  54         gpio_free(GPIO_NR_PALMLD_PCMCIA_RESET);
  55 err2:
  56         gpio_free(GPIO_NR_PALMLD_PCMCIA_POWER);
  57 err1:
  58         return ret;
  59 }
  60
  61 static void palmld_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt)
  62 {
  63         gpio_free(GPIO_NR_PALMLD_PCMCIA_READY);
  64         gpio_free(GPIO_NR_PALMLD_PCMCIA_RESET);
  65         gpio_free(GPIO_NR_PALMLD_PCMCIA_POWER);
  66 }
  67
  68 static void palmld_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
  69                                         struct pcmcia_state *state)
  70 {
  71         state->detect = 1; /* always inserted */
  72         state->ready  = !!gpio_get_value(GPIO_NR_PALMLD_PCMCIA_READY);
  73         state->bvd1   = 1;
  74         state->bvd2   = 1;
  75         state->wrprot = 0;
  76         state->vs_3v  = 1;
  77         state->vs_Xv  = 0;
  78 }
  79
  80 static int palmld_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
  81                                         const socket_state_t *state)
  82 {
  83         gpio_set_value(GPIO_NR_PALMLD_PCMCIA_POWER, 1);
  84         gpio_set_value(GPIO_NR_PALMLD_PCMCIA_RESET,
  85                         !!(state->flags & SS_RESET));
  86
  87         return 0;
  88 }
  89
  90 static void palmld_pcmcia_socket_init(struct soc_pcmcia_socket *skt)
  91 {
  92 }
  93
  94 static void palmld_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt)
  95 {
  96 }
  97
  98 static struct pcmcia_low_level palmld_pcmcia_ops = {
  99         .owner                  = THIS_MODULE,
 100
 101         .first                  = 1,
 102         .nr                     = 1,
 103
 104         .hw_init                = palmld_pcmcia_hw_init,
 105         .hw_shutdown            = palmld_pcmcia_hw_shutdown,
 106
 107         .socket_state           = palmld_pcmcia_socket_state,
 108         .configure_socket       = palmld_pcmcia_configure_socket,
 109
 110         .socket_init            = palmld_pcmcia_socket_init,
 111         .socket_suspend         = palmld_pcmcia_socket_suspend,
 112 };
 113
 114 static struct platform_device *palmld_pcmcia_device;
 115
 116 static int __init palmld_pcmcia_init(void)
 117 {
 118         int ret;
 119
 120         if (!machine_is_palmld())
 121                 return -ENODEV;
 122
 123         palmld_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1);
 124         if (!palmld_pcmcia_device)
 125                 return -ENOMEM;
 126
 127         ret = platform_device_add_data(palmld_pcmcia_device, &palmld_pcmcia_ops,
 128                                         sizeof(palmld_pcmcia_ops));
 129
 130         if (!ret)
 131                 ret = platform_device_add(palmld_pcmcia_device);
 132
 133         if (ret)
 134                 platform_device_put(palmld_pcmcia_device);
 135
 136         return ret;
 137 }
 138
 139 static void __exit palmld_pcmcia_exit(void)
 140 {
 141         platform_device_unregister(palmld_pcmcia_device);
 142 }
 143
 144 module_init(palmld_pcmcia_init);
 145 module_exit(palmld_pcmcia_exit);
 146
 147 MODULE_AUTHOR("Alex Osborne <ato@meshy.org>,"
 148             " Marek Vasut <marek.vasut@gmail.com>");
 149 MODULE_DESCRIPTION("PCMCIA support for Palm LifeDrive");
 150 MODULE_ALIAS("platform:pxa2xx-pcmcia");
 151 MODULE_LICENSE("GPL");