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) 2007-2011 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 struct gpio palmld_pcmcia_gpios[] = {
  24         { GPIO_NR_PALMLD_PCMCIA_POWER,  GPIOF_INIT_LOW, "PCMCIA Power" },
  25         { GPIO_NR_PALMLD_PCMCIA_RESET,  GPIOF_INIT_HIGH,"PCMCIA Reset" },
  26         { GPIO_NR_PALMLD_PCMCIA_READY,  GPIOF_IN,       "PCMCIA Ready" },
  27 };
  28
  29 static int palmld_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
  30 {
  31         int ret;
  32
  33         ret = gpio_request_array(palmld_pcmcia_gpios,
  34                                 ARRAY_SIZE(palmld_pcmcia_gpios));
  35
  36         skt->socket.pci_irq = IRQ_GPIO(GPIO_NR_PALMLD_PCMCIA_READY);
  37
  38         return ret;
  39 }
  40
  41 static void palmld_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt)
  42 {
  43         gpio_free_array(palmld_pcmcia_gpios, ARRAY_SIZE(palmld_pcmcia_gpios));
  44 }
  45
  46 static void palmld_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
  47                                         struct pcmcia_state *state)
  48 {
  49         state->detect = 1; /* always inserted */
  50         state->ready  = !!gpio_get_value(GPIO_NR_PALMLD_PCMCIA_READY);
  51         state->bvd1   = 1;
  52         state->bvd2   = 1;
  53         state->wrprot = 0;
  54         state->vs_3v  = 1;
  55         state->vs_Xv  = 0;
  56 }
  57
  58 static int palmld_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
  59                                         const socket_state_t *state)
  60 {
  61         gpio_set_value(GPIO_NR_PALMLD_PCMCIA_POWER, 1);
  62         gpio_set_value(GPIO_NR_PALMLD_PCMCIA_RESET,
  63                         !!(state->flags & SS_RESET));
  64
  65         return 0;
  66 }
  67
  68 static struct pcmcia_low_level palmld_pcmcia_ops = {
  69         .owner                  = THIS_MODULE,
  70
  71         .first                  = 1,
  72         .nr                     = 1,
  73
  74         .hw_init                = palmld_pcmcia_hw_init,
  75         .hw_shutdown            = palmld_pcmcia_hw_shutdown,
  76
  77         .socket_state           = palmld_pcmcia_socket_state,
  78         .configure_socket       = palmld_pcmcia_configure_socket,
  79 };
  80
  81 static struct platform_device *palmld_pcmcia_device;
  82
  83 static int __init palmld_pcmcia_init(void)
  84 {
  85         int ret;
  86
  87         if (!machine_is_palmld())
  88                 return -ENODEV;
  89
  90         palmld_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1);
  91         if (!palmld_pcmcia_device)
  92                 return -ENOMEM;
  93
  94         ret = platform_device_add_data(palmld_pcmcia_device, &palmld_pcmcia_ops,
  95                                         sizeof(palmld_pcmcia_ops));
  96
  97         if (!ret)
  98                 ret = platform_device_add(palmld_pcmcia_device);
  99
 100         if (ret)
 101                 platform_device_put(palmld_pcmcia_device);
 102
 103         return ret;
 104 }
 105
 106 static void __exit palmld_pcmcia_exit(void)
 107 {
 108         platform_device_unregister(palmld_pcmcia_device);
 109 }
 110
 111 module_init(palmld_pcmcia_init);
 112 module_exit(palmld_pcmcia_exit);
 113
 114 MODULE_AUTHOR("Alex Osborne <ato@meshy.org>,"
 115             " Marek Vasut <marek.vasut@gmail.com>");
 116 MODULE_DESCRIPTION("PCMCIA support for Palm LifeDrive");
 117 MODULE_ALIAS("platform:pxa2xx-pcmcia");
 118 MODULE_LICENSE("GPL");