linux/drivers/pcmcia/pxa2xx_e740.c
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   1/*
   2 * Toshiba e740 PCMCIA specific routines.
   3 *
   4 * (c) 2004 Ian Molton <spyro@f2s.com>
   5 *
   6 * This program is free software; you can redistribute it and/or modify
   7 * it under the terms of the GNU General Public License version 2 as
   8 * published by the Free Software Foundation.
   9 */
  10
  11#include <linux/init.h>
  12#include <linux/module.h>
  13#include <linux/kernel.h>
  14#include <linux/errno.h>
  15#include <linux/gpio.h>
  16#include <linux/interrupt.h>
  17#include <linux/platform_device.h>
  18
  19#include <mach/eseries-gpio.h>
  20
  21#include <asm/irq.h>
  22#include <asm/mach-types.h>
  23
  24#include "soc_common.h"
  25
  26static int e740_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
  27{
  28        if (skt->nr == 0) {
  29                skt->stat[SOC_STAT_CD].gpio = GPIO_E740_PCMCIA_CD0;
  30                skt->stat[SOC_STAT_CD].name = "CF card detect";
  31                skt->stat[SOC_STAT_RDY].gpio = GPIO_E740_PCMCIA_RDY0;
  32                skt->stat[SOC_STAT_RDY].name = "CF ready";
  33        } else {
  34                skt->stat[SOC_STAT_CD].gpio = GPIO_E740_PCMCIA_CD1;
  35                skt->stat[SOC_STAT_CD].name = "Wifi switch";
  36                skt->stat[SOC_STAT_RDY].gpio = GPIO_E740_PCMCIA_RDY1;
  37                skt->stat[SOC_STAT_RDY].name = "Wifi ready";
  38        }
  39
  40        return 0;
  41}
  42
  43static void e740_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
  44                                        struct pcmcia_state *state)
  45{
  46        state->vs_3v  = 1;
  47        state->vs_Xv  = 0;
  48}
  49
  50static int e740_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
  51                                        const socket_state_t *state)
  52{
  53        if (state->flags & SS_RESET) {
  54                if (skt->nr == 0)
  55                        gpio_set_value(GPIO_E740_PCMCIA_RST0, 1);
  56                else
  57                        gpio_set_value(GPIO_E740_PCMCIA_RST1, 1);
  58        } else {
  59                if (skt->nr == 0)
  60                        gpio_set_value(GPIO_E740_PCMCIA_RST0, 0);
  61                else
  62                        gpio_set_value(GPIO_E740_PCMCIA_RST1, 0);
  63        }
  64
  65        switch (state->Vcc) {
  66        case 0: /* Socket off */
  67                if (skt->nr == 0)
  68                        gpio_set_value(GPIO_E740_PCMCIA_PWR0, 0);
  69                else
  70                        gpio_set_value(GPIO_E740_PCMCIA_PWR1, 1);
  71                break;
  72        case 50:
  73        case 33: /* socket on */
  74                if (skt->nr == 0)
  75                        gpio_set_value(GPIO_E740_PCMCIA_PWR0, 1);
  76                else
  77                        gpio_set_value(GPIO_E740_PCMCIA_PWR1, 0);
  78                break;
  79        default:
  80                printk(KERN_ERR "e740_cs: Unsupported Vcc: %d\n", state->Vcc);
  81        }
  82
  83        return 0;
  84}
  85
  86static struct pcmcia_low_level e740_pcmcia_ops = {
  87        .owner            = THIS_MODULE,
  88        .hw_init          = e740_pcmcia_hw_init,
  89        .socket_state     = e740_pcmcia_socket_state,
  90        .configure_socket = e740_pcmcia_configure_socket,
  91        .nr               = 2,
  92};
  93
  94static struct platform_device *e740_pcmcia_device;
  95
  96static int __init e740_pcmcia_init(void)
  97{
  98        int ret;
  99
 100        if (!machine_is_e740())
 101                return -ENODEV;
 102
 103        e740_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1);
 104        if (!e740_pcmcia_device)
 105                return -ENOMEM;
 106
 107        ret = platform_device_add_data(e740_pcmcia_device, &e740_pcmcia_ops,
 108                                        sizeof(e740_pcmcia_ops));
 109
 110        if (!ret)
 111                ret = platform_device_add(e740_pcmcia_device);
 112
 113        if (ret)
 114                platform_device_put(e740_pcmcia_device);
 115
 116        return ret;
 117}
 118
 119static void __exit e740_pcmcia_exit(void)
 120{
 121        platform_device_unregister(e740_pcmcia_device);
 122}
 123
 124module_init(e740_pcmcia_init);
 125module_exit(e740_pcmcia_exit);
 126
 127MODULE_LICENSE("GPL v2");
 128MODULE_AUTHOR("Ian Molton <spyro@f2s.com>");
 129MODULE_ALIAS("platform:pxa2xx-pcmcia");
 130MODULE_DESCRIPTION("e740 PCMCIA platform support");
 131
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