linux/drivers/pcmcia/sa1100_cerf.c
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   1/*
   2 * drivers/pcmcia/sa1100_cerf.c
   3 *
   4 * PCMCIA implementation routines for CerfBoard
   5 * Based off the Assabet.
   6 *
   7 */
   8#include <linux/module.h>
   9#include <linux/kernel.h>
  10#include <linux/device.h>
  11#include <linux/init.h>
  12#include <linux/delay.h>
  13#include <linux/gpio.h>
  14
  15#include <mach/hardware.h>
  16#include <asm/mach-types.h>
  17#include <asm/irq.h>
  18#include <mach/cerf.h>
  19#include "sa1100_generic.h"
  20
  21#define CERF_SOCKET     1
  22
  23static int cerf_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
  24{
  25        int ret;
  26
  27        ret = gpio_request_one(CERF_GPIO_CF_RESET, GPIOF_OUT_INIT_LOW, "CF_RESET");
  28        if (ret)
  29                return ret;
  30
  31        skt->stat[SOC_STAT_CD].gpio = CERF_GPIO_CF_CD;
  32        skt->stat[SOC_STAT_CD].name = "CF_CD";
  33        skt->stat[SOC_STAT_BVD1].gpio = CERF_GPIO_CF_BVD1;
  34        skt->stat[SOC_STAT_BVD1].name = "CF_BVD1";
  35        skt->stat[SOC_STAT_BVD2].gpio = CERF_GPIO_CF_BVD2;
  36        skt->stat[SOC_STAT_BVD2].name = "CF_BVD2";
  37        skt->stat[SOC_STAT_RDY].gpio = CERF_GPIO_CF_IRQ;
  38        skt->stat[SOC_STAT_RDY].name = "CF_IRQ";
  39
  40        return 0;
  41}
  42
  43static void cerf_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt)
  44{
  45        gpio_free(CERF_GPIO_CF_RESET);
  46}
  47
  48static void
  49cerf_pcmcia_socket_state(struct soc_pcmcia_socket *skt, struct pcmcia_state *state)
  50{
  51        state->vs_3v    = 1;
  52        state->vs_Xv    = 0;
  53}
  54
  55static int
  56cerf_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
  57                             const socket_state_t *state)
  58{
  59        switch (state->Vcc) {
  60        case 0:
  61        case 50:
  62        case 33:
  63                break;
  64
  65        default:
  66                printk(KERN_ERR "%s(): unrecognized Vcc %u\n",
  67                        __func__, state->Vcc);
  68                return -1;
  69        }
  70
  71        gpio_set_value(CERF_GPIO_CF_RESET, !!(state->flags & SS_RESET));
  72
  73        return 0;
  74}
  75
  76static struct pcmcia_low_level cerf_pcmcia_ops = { 
  77        .owner                  = THIS_MODULE,
  78        .hw_init                = cerf_pcmcia_hw_init,
  79        .hw_shutdown            = cerf_pcmcia_hw_shutdown,
  80        .socket_state           = cerf_pcmcia_socket_state,
  81        .configure_socket       = cerf_pcmcia_configure_socket,
  82};
  83
  84int __devinit pcmcia_cerf_init(struct device *dev)
  85{
  86        int ret = -ENODEV;
  87
  88        if (machine_is_cerf())
  89                ret = sa11xx_drv_pcmcia_probe(dev, &cerf_pcmcia_ops, CERF_SOCKET, 1);
  90
  91        return ret;
  92}
  93
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