LXR linux/drivers/pcmcia/pxa2xx

   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 struct pcmcia_irqs cd_irqs[] = {
  27        {
  28                .sock = 0,
  29                .irq  = IRQ_GPIO(GPIO_E740_PCMCIA_CD0),
  30                .str  = "CF card detect"
  31        },
  32        {
  33                .sock = 1,
  34                .irq  = IRQ_GPIO(GPIO_E740_PCMCIA_CD1),
  35                .str  = "Wifi switch"
  36        },
  37};
  38
  39static int e740_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
  40{
  41        skt->socket.pci_irq = skt->nr == 0 ? IRQ_GPIO(GPIO_E740_PCMCIA_RDY0) :
  42                                IRQ_GPIO(GPIO_E740_PCMCIA_RDY1);
  43
  44        return soc_pcmcia_request_irqs(skt, &cd_irqs[skt->nr], 1);
  45}
  46
  47/*
  48 * Release all resources.
  49 */
  50static void e740_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt)
  51{
  52        soc_pcmcia_free_irqs(skt, &cd_irqs[skt->nr], 1);
  53}
  54
  55static void e740_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
  56                                        struct pcmcia_state *state)
  57{
  58        if (skt->nr == 0) {
  59                state->detect = gpio_get_value(GPIO_E740_PCMCIA_CD0) ? 0 : 1;
  60                state->ready  = gpio_get_value(GPIO_E740_PCMCIA_RDY0) ? 1 : 0;
  61        } else {
  62                state->detect = gpio_get_value(GPIO_E740_PCMCIA_CD1) ? 0 : 1;
  63                state->ready  = gpio_get_value(GPIO_E740_PCMCIA_RDY1) ? 1 : 0;
  64        }
  65
  66        state->vs_3v  = 1;
  67        state->bvd1   = 1;
  68        state->bvd2   = 1;
  69        state->wrprot = 0;
  70        state->vs_Xv  = 0;
  71}
  72
  73static int e740_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
  74                                        const socket_state_t *state)
  75{
  76        if (state->flags & SS_RESET) {
  77                if (skt->nr == 0)
  78                        gpio_set_value(GPIO_E740_PCMCIA_RST0, 1);
  79                else
  80                        gpio_set_value(GPIO_E740_PCMCIA_RST1, 1);
  81        } else {
  82                if (skt->nr == 0)
  83                        gpio_set_value(GPIO_E740_PCMCIA_RST0, 0);
  84                else
  85                        gpio_set_value(GPIO_E740_PCMCIA_RST1, 0);
  86        }
  87
  88        switch (state->Vcc) {
  89        case 0: /* Socket off */
  90                if (skt->nr == 0)
  91                        gpio_set_value(GPIO_E740_PCMCIA_PWR0, 0);
  92                else
  93                        gpio_set_value(GPIO_E740_PCMCIA_PWR1, 1);
  94                break;
  95        case 50:
  96        case 33: /* socket on */
  97                if (skt->nr == 0)
  98                        gpio_set_value(GPIO_E740_PCMCIA_PWR0, 1);
  99                else
 100                        gpio_set_value(GPIO_E740_PCMCIA_PWR1, 0);
 101                break;
 102        default:
 103                printk(KERN_ERR "e740_cs: Unsupported Vcc: %d\n", state->Vcc);
 104        }
 105
 106        return 0;
 107}
 108
 109/*
 110 * Enable card status IRQs on (re-)initialisation.  This can
 111 * be called at initialisation, power management event, or
 112 * pcmcia event.
 113 */
 114static void e740_pcmcia_socket_init(struct soc_pcmcia_socket *skt)
 115{
 116        soc_pcmcia_enable_irqs(skt, cd_irqs, ARRAY_SIZE(cd_irqs));
 117}
 118
 119/*
 120 * Disable card status IRQs on suspend.
 121 */
 122static void e740_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt)
 123{
 124        soc_pcmcia_disable_irqs(skt, cd_irqs, ARRAY_SIZE(cd_irqs));
 125}
 126
 127static struct pcmcia_low_level e740_pcmcia_ops = {
 128        .owner            = THIS_MODULE,
 129        .hw_init          = e740_pcmcia_hw_init,
 130        .hw_shutdown      = e740_pcmcia_hw_shutdown,
 131        .socket_state     = e740_pcmcia_socket_state,
 132        .configure_socket = e740_pcmcia_configure_socket,
 133        .socket_init      = e740_pcmcia_socket_init,
 134        .socket_suspend   = e740_pcmcia_socket_suspend,
 135        .nr               = 2,
 136};
 137
 138static struct platform_device *e740_pcmcia_device;
 139
 140static int __init e740_pcmcia_init(void)
 141{
 142        int ret;
 143
 144        if (!machine_is_e740())
 145                return -ENODEV;
 146
 147        e740_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1);
 148        if (!e740_pcmcia_device)
 149                return -ENOMEM;
 150
 151        ret = platform_device_add_data(e740_pcmcia_device, &e740_pcmcia_ops,
 152                                        sizeof(e740_pcmcia_ops));
 153
 154        if (!ret)
 155                ret = platform_device_add(e740_pcmcia_device);
 156
 157        if (ret)
 158                platform_device_put(e740_pcmcia_device);
 159
 160        return ret;
 161}
 162
 163static void __exit e740_pcmcia_exit(void)
 164{
 165        platform_device_unregister(e740_pcmcia_device);
 166}
 167
 168module_init(e740_pcmcia_init);
 169module_exit(e740_pcmcia_exit);
 170
 171MODULE_LICENSE("GPL v2");
 172MODULE_AUTHOR("Ian Molton <spyro@f2s.com>");
 173MODULE_ALIAS("platform:pxa2xx-pcmcia");
 174MODULE_DESCRIPTION("e740 PCMCIA platform support");
 175