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 struct pcmcia_irqs cd_irqs[] = {
  27        {
  28                .sock = 0,
  29                .str  = "CF card detect"
  30        },
  31        {
  32                .sock = 1,
  33                .str  = "Wifi switch"
  34        },
  35};
  36
  37static int e740_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
  38{
  39        if (skt->nr == 0)
  40                skt->socket.pci_irq = gpio_to_irq(GPIO_E740_PCMCIA_RDY0);
  41        else
  42                skt->socket.pci_irq = gpio_to_irq(GPIO_E740_PCMCIA_RDY1);
  43
  44        cd_irqs[0].irq = gpio_to_irq(GPIO_E740_PCMCIA_CD0);
  45        cd_irqs[1].irq = gpio_to_irq(GPIO_E740_PCMCIA_CD1);
  46
  47        return soc_pcmcia_request_irqs(skt, &cd_irqs[skt->nr], 1);
  48}
  49
  50/*
  51 * Release all resources.
  52 */
  53static void e740_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt)
  54{
  55        soc_pcmcia_free_irqs(skt, &cd_irqs[skt->nr], 1);
  56}
  57
  58static void e740_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
  59                                        struct pcmcia_state *state)
  60{
  61        if (skt->nr == 0) {
  62                state->detect = gpio_get_value(GPIO_E740_PCMCIA_CD0) ? 0 : 1;
  63                state->ready  = gpio_get_value(GPIO_E740_PCMCIA_RDY0) ? 1 : 0;
  64        } else {
  65                state->detect = gpio_get_value(GPIO_E740_PCMCIA_CD1) ? 0 : 1;
  66                state->ready  = gpio_get_value(GPIO_E740_PCMCIA_RDY1) ? 1 : 0;
  67        }
  68
  69        state->vs_3v  = 1;
  70        state->bvd1   = 1;
  71        state->bvd2   = 1;
  72        state->wrprot = 0;
  73        state->vs_Xv  = 0;
  74}
  75
  76static int e740_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
  77                                        const socket_state_t *state)
  78{
  79        if (state->flags & SS_RESET) {
  80                if (skt->nr == 0)
  81                        gpio_set_value(GPIO_E740_PCMCIA_RST0, 1);
  82                else
  83                        gpio_set_value(GPIO_E740_PCMCIA_RST1, 1);
  84        } else {
  85                if (skt->nr == 0)
  86                        gpio_set_value(GPIO_E740_PCMCIA_RST0, 0);
  87                else
  88                        gpio_set_value(GPIO_E740_PCMCIA_RST1, 0);
  89        }
  90
  91        switch (state->Vcc) {
  92        case 0: /* Socket off */
  93                if (skt->nr == 0)
  94                        gpio_set_value(GPIO_E740_PCMCIA_PWR0, 0);
  95                else
  96                        gpio_set_value(GPIO_E740_PCMCIA_PWR1, 1);
  97                break;
  98        case 50:
  99        case 33: /* socket on */
 100                if (skt->nr == 0)
 101                        gpio_set_value(GPIO_E740_PCMCIA_PWR0, 1);
 102                else
 103                        gpio_set_value(GPIO_E740_PCMCIA_PWR1, 0);
 104                break;
 105        default:
 106                printk(KERN_ERR "e740_cs: Unsupported Vcc: %d\n", state->Vcc);
 107        }
 108
 109        return 0;
 110}
 111
 112/*
 113 * Enable card status IRQs on (re-)initialisation.  This can
 114 * be called at initialisation, power management event, or
 115 * pcmcia event.
 116 */
 117static void e740_pcmcia_socket_init(struct soc_pcmcia_socket *skt)
 118{
 119        soc_pcmcia_enable_irqs(skt, cd_irqs, ARRAY_SIZE(cd_irqs));
 120}
 121
 122/*
 123 * Disable card status IRQs on suspend.
 124 */
 125static void e740_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt)
 126{
 127        soc_pcmcia_disable_irqs(skt, cd_irqs, ARRAY_SIZE(cd_irqs));
 128}
 129
 130static struct pcmcia_low_level e740_pcmcia_ops = {
 131        .owner            = THIS_MODULE,
 132        .hw_init          = e740_pcmcia_hw_init,
 133        .hw_shutdown      = e740_pcmcia_hw_shutdown,
 134        .socket_state     = e740_pcmcia_socket_state,
 135        .configure_socket = e740_pcmcia_configure_socket,
 136        .socket_init      = e740_pcmcia_socket_init,
 137        .socket_suspend   = e740_pcmcia_socket_suspend,
 138        .nr               = 2,
 139};
 140
 141static struct platform_device *e740_pcmcia_device;
 142
 143static int __init e740_pcmcia_init(void)
 144{
 145        int ret;
 146
 147        if (!machine_is_e740())
 148                return -ENODEV;
 149
 150        e740_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1);
 151        if (!e740_pcmcia_device)
 152                return -ENOMEM;
 153
 154        ret = platform_device_add_data(e740_pcmcia_device, &e740_pcmcia_ops,
 155                                        sizeof(e740_pcmcia_ops));
 156
 157        if (!ret)
 158                ret = platform_device_add(e740_pcmcia_device);
 159
 160        if (ret)
 161                platform_device_put(e740_pcmcia_device);
 162
 163        return ret;
 164}
 165
 166static void __exit e740_pcmcia_exit(void)
 167{
 168        platform_device_unregister(e740_pcmcia_device);
 169}
 170
 171module_init(e740_pcmcia_init);
 172module_exit(e740_pcmcia_exit);
 173
 174MODULE_LICENSE("GPL v2");
 175MODULE_AUTHOR("Ian Molton <spyro@f2s.com>");
 176MODULE_ALIAS("platform:pxa2xx-pcmcia");
 177MODULE_DESCRIPTION("e740 PCMCIA platform support");
 178