LXR linux/drivers/pcmcia/pxa2xx

   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        { GPIO_NR_PALMTX_PCMCIA_READY,  GPIOF_IN,       "PCMCIA Ready" },
  27};
  28
  29static int palmtx_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
  30{
  31        int ret;
  32
  33        ret = gpio_request_array(palmtx_pcmcia_gpios,
  34                                ARRAY_SIZE(palmtx_pcmcia_gpios));
  35
  36        skt->socket.pci_irq = gpio_to_irq(GPIO_NR_PALMTX_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->ready  = !!gpio_get_value(GPIO_NR_PALMTX_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
  58static int
  59palmtx_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
  60                                const socket_state_t *state)
  61{
  62        gpio_set_value(GPIO_NR_PALMTX_PCMCIA_POWER1, 1);
  63        gpio_set_value(GPIO_NR_PALMTX_PCMCIA_POWER2, 1);
  64        gpio_set_value(GPIO_NR_PALMTX_PCMCIA_RESET,
  65                        !!(state->flags & SS_RESET));
  66
  67        return 0;
  68}
  69
  70static struct pcmcia_low_level palmtx_pcmcia_ops = {
  71        .owner                  = THIS_MODULE,
  72
  73        .first                  = 0,
  74        .nr                     = 1,
  75
  76        .hw_init                = palmtx_pcmcia_hw_init,
  77        .hw_shutdown            = palmtx_pcmcia_hw_shutdown,
  78
  79        .socket_state           = palmtx_pcmcia_socket_state,
  80        .configure_socket       = palmtx_pcmcia_configure_socket,
  81};
  82
  83static struct platform_device *palmtx_pcmcia_device;
  84
  85static int __init palmtx_pcmcia_init(void)
  86{
  87        int ret;
  88
  89        if (!machine_is_palmtx())
  90                return -ENODEV;
  91
  92        palmtx_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1);
  93        if (!palmtx_pcmcia_device)
  94                return -ENOMEM;
  95
  96        ret = platform_device_add_data(palmtx_pcmcia_device, &palmtx_pcmcia_ops,
  97                                        sizeof(palmtx_pcmcia_ops));
  98
  99        if (!ret)
 100                ret = platform_device_add(palmtx_pcmcia_device);
 101
 102        if (ret)
 103                platform_device_put(palmtx_pcmcia_device);
 104
 105        return ret;
 106}
 107
 108static void __exit palmtx_pcmcia_exit(void)
 109{
 110        platform_device_unregister(palmtx_pcmcia_device);
 111}
 112
 113module_init(palmtx_pcmcia_init);
 114module_exit(palmtx_pcmcia_exit);
 115
 116MODULE_AUTHOR("Marek Vasut <marek.vasut@gmail.com>");
 117MODULE_DESCRIPTION("PCMCIA support for Palm T|X");
 118MODULE_ALIAS("platform:pxa2xx-pcmcia");
 119MODULE_LICENSE("GPL");
 120