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 };
  27
  28 static int palmld_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
  29 {
  30         int ret;
  31
  32         ret = gpio_request_array(palmld_pcmcia_gpios,
  33                                 ARRAY_SIZE(palmld_pcmcia_gpios));
  34
  35         skt->stat[SOC_STAT_RDY].gpio = GPIO_NR_PALMLD_PCMCIA_READY;
  36         skt->stat[SOC_STAT_RDY].name = "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->vs_3v  = 1;
  51         state->vs_Xv  = 0;
  52 }
  53
  54 static int palmld_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
  55                                         const socket_state_t *state)
  56 {
  57         gpio_set_value(GPIO_NR_PALMLD_PCMCIA_POWER, 1);
  58         gpio_set_value(GPIO_NR_PALMLD_PCMCIA_RESET,
  59                         !!(state->flags & SS_RESET));
  60
  61         return 0;
  62 }
  63
  64 static struct pcmcia_low_level palmld_pcmcia_ops = {
  65         .owner                  = THIS_MODULE,
  66
  67         .first                  = 1,
  68         .nr                     = 1,
  69
  70         .hw_init                = palmld_pcmcia_hw_init,
  71         .hw_shutdown            = palmld_pcmcia_hw_shutdown,
  72
  73         .socket_state           = palmld_pcmcia_socket_state,
  74         .configure_socket       = palmld_pcmcia_configure_socket,
  75 };
  76
  77 static struct platform_device *palmld_pcmcia_device;
  78
  79 static int __init palmld_pcmcia_init(void)
  80 {
  81         int ret;
  82
  83         if (!machine_is_palmld())
  84                 return -ENODEV;
  85
  86         palmld_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1);
  87         if (!palmld_pcmcia_device)
  88                 return -ENOMEM;
  89
  90         ret = platform_device_add_data(palmld_pcmcia_device, &palmld_pcmcia_ops,
  91                                         sizeof(palmld_pcmcia_ops));
  92
  93         if (!ret)
  94                 ret = platform_device_add(palmld_pcmcia_device);
  95
  96         if (ret)
  97                 platform_device_put(palmld_pcmcia_device);
  98
  99         return ret;
 100 }
 101
 102 static void __exit palmld_pcmcia_exit(void)
 103 {
 104         platform_device_unregister(palmld_pcmcia_device);
 105 }
 106
 107 module_init(palmld_pcmcia_init);
 108 module_exit(palmld_pcmcia_exit);
 109
 110 MODULE_AUTHOR("Alex Osborne <ato@meshy.org>,"
 111             " Marek Vasut <marek.vasut@gmail.com>");
 112 MODULE_DESCRIPTION("PCMCIA support for Palm LifeDrive");
 113 MODULE_ALIAS("platform:pxa2xx-pcmcia");
 114 MODULE_LICENSE("GPL");