linux/drivers/pcmcia/pxa2xx_palmtx.c
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   1/*
   2 * linux/drivers/pcmcia/pxa2xx_palmtx.c
   3 *
   4 * Driver for Palm T|X PCMCIA
   5 *
   6 * Copyright (C) 2007-2011 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#include <linux/gpio.h>
  17
  18#include <asm/mach-types.h>
  19#include <mach/palmtx.h>
  20#include "soc_common.h"
  21
  22static struct gpio palmtx_pcmcia_gpios[] = {
  23        { GPIO_NR_PALMTX_PCMCIA_POWER1, GPIOF_INIT_LOW, "PCMCIA Power 1" },
  24        { GPIO_NR_PALMTX_PCMCIA_POWER2, GPIOF_INIT_LOW, "PCMCIA Power 2" },
  25        { GPIO_NR_PALMTX_PCMCIA_RESET,  GPIOF_INIT_HIGH,"PCMCIA Reset" },
  26};
  27
  28static int palmtx_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
  29{
  30        int ret;
  31
  32        ret = gpio_request_array(palmtx_pcmcia_gpios,
  33                                ARRAY_SIZE(palmtx_pcmcia_gpios));
  34
  35        skt->stat[SOC_STAT_RDY].gpio = GPIO_NR_PALMTX_PCMCIA_READY;
  36        skt->stat[SOC_STAT_RDY].name = "PCMCIA Ready";
  37
  38        return ret;
  39}
  40
  41static void palmtx_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt)
  42{
  43        gpio_free_array(palmtx_pcmcia_gpios, ARRAY_SIZE(palmtx_pcmcia_gpios));
  44}
  45
  46static void palmtx_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
  55palmtx_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
  56                                const socket_state_t *state)
  57{
  58        gpio_set_value(GPIO_NR_PALMTX_PCMCIA_POWER1, 1);
  59        gpio_set_value(GPIO_NR_PALMTX_PCMCIA_POWER2, 1);
  60        gpio_set_value(GPIO_NR_PALMTX_PCMCIA_RESET,
  61                        !!(state->flags & SS_RESET));
  62
  63        return 0;
  64}
  65
  66static 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
  79static struct platform_device *palmtx_pcmcia_device;
  80
  81static int __init palmtx_pcmcia_init(void)
  82{
  83        int ret;
  84
  85        if (!machine_is_palmtx())
  86                return -ENODEV;
  87
  88        palmtx_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1);
  89        if (!palmtx_pcmcia_device)
  90                return -ENOMEM;
  91
  92        ret = platform_device_add_data(palmtx_pcmcia_device, &palmtx_pcmcia_ops,
  93                                        sizeof(palmtx_pcmcia_ops));
  94
  95        if (!ret)
  96                ret = platform_device_add(palmtx_pcmcia_device);
  97
  98        if (ret)
  99                platform_device_put(palmtx_pcmcia_device);
 100
 101        return ret;
 102}
 103
 104static void __exit palmtx_pcmcia_exit(void)
 105{
 106        platform_device_unregister(palmtx_pcmcia_device);
 107}
 108
 109module_init(palmtx_pcmcia_init);
 110module_exit(palmtx_pcmcia_exit);
 111
 112MODULE_AUTHOR("Marek Vasut <marek.vasut@gmail.com>");
 113MODULE_DESCRIPTION("PCMCIA support for Palm T|X");
 114MODULE_ALIAS("platform:pxa2xx-pcmcia");
 115MODULE_LICENSE("GPL");
 116
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