LXR linux/drivers/pcmcia/pxa2xx

   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
  23static 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
  28static 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
  41static 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
  46static 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
  54static 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
  64static 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
  77static struct platform_device *palmld_pcmcia_device;
  78
  79static 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
 102static void __exit palmld_pcmcia_exit(void)
 103{
 104        platform_device_unregister(palmld_pcmcia_device);
 105}
 106
 107module_init(palmld_pcmcia_init);
 108module_exit(palmld_pcmcia_exit);
 109
 110MODULE_AUTHOR("Alex Osborne <ato@meshy.org>,"
 111            " Marek Vasut <marek.vasut@gmail.com>");
 112MODULE_DESCRIPTION("PCMCIA support for Palm LifeDrive");
 113MODULE_ALIAS("platform:pxa2xx-pcmcia");
 114MODULE_LICENSE("GPL");
 115