LXR linux/drivers/pcmcia/sa1100

   1/*
   2 * drivers/pcmcia/sa1100_assabet.c
   3 *
   4 * PCMCIA implementation routines for Assabet
   5 *
   6 */
   7#include <linux/module.h>
   8#include <linux/kernel.h>
   9#include <linux/errno.h>
  10#include <linux/interrupt.h>
  11#include <linux/device.h>
  12#include <linux/init.h>
  13#include <linux/gpio.h>
  14
  15#include <asm/mach-types.h>
  16#include <mach/assabet.h>
  17
  18#include "sa1100_generic.h"
  19
  20static int assabet_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
  21{
  22        skt->stat[SOC_STAT_CD].gpio = ASSABET_GPIO_CF_CD;
  23        skt->stat[SOC_STAT_CD].name = "CF CD";
  24        skt->stat[SOC_STAT_BVD1].gpio = ASSABET_GPIO_CF_BVD1;
  25        skt->stat[SOC_STAT_BVD1].name = "CF BVD1";
  26        skt->stat[SOC_STAT_BVD2].gpio = ASSABET_GPIO_CF_BVD2;
  27        skt->stat[SOC_STAT_BVD2].name = "CF BVD2";
  28        skt->stat[SOC_STAT_RDY].gpio = ASSABET_GPIO_CF_IRQ;
  29        skt->stat[SOC_STAT_RDY].name = "CF RDY";
  30
  31        return 0;
  32}
  33
  34static int
  35assabet_pcmcia_configure_socket(struct soc_pcmcia_socket *skt, const socket_state_t *state)
  36{
  37        unsigned int mask;
  38
  39        switch (state->Vcc) {
  40        case 0:
  41                mask = 0;
  42                break;
  43
  44        case 50:
  45                printk(KERN_WARNING "%s(): CS asked for 5V, applying 3.3V...\n",
  46                        __func__);
  47
  48        case 33:  /* Can only apply 3.3V to the CF slot. */
  49                mask = ASSABET_BCR_CF_PWR;
  50                break;
  51
  52        default:
  53                printk(KERN_ERR "%s(): unrecognized Vcc %u\n", __func__,
  54                        state->Vcc);
  55                return -1;
  56        }
  57
  58        /* Silently ignore Vpp, speaker enable. */
  59
  60        if (state->flags & SS_RESET)
  61                mask |= ASSABET_BCR_CF_RST;
  62        if (!(state->flags & SS_OUTPUT_ENA))
  63                mask |= ASSABET_BCR_CF_BUS_OFF;
  64
  65        ASSABET_BCR_frob(ASSABET_BCR_CF_RST | ASSABET_BCR_CF_PWR |
  66                        ASSABET_BCR_CF_BUS_OFF, mask);
  67
  68        return 0;
  69}
  70
  71/*
  72 * Disable card status IRQs on suspend.
  73 */
  74static void assabet_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt)
  75{
  76        /*
  77         * Tristate the CF bus signals.  Also assert CF
  78         * reset as per user guide page 4-11.
  79         */
  80        ASSABET_BCR_set(ASSABET_BCR_CF_BUS_OFF | ASSABET_BCR_CF_RST);
  81}
  82
  83static struct pcmcia_low_level assabet_pcmcia_ops = { 
  84        .owner                  = THIS_MODULE,
  85        .hw_init                = assabet_pcmcia_hw_init,
  86        .socket_state           = soc_common_cf_socket_state,
  87        .configure_socket       = assabet_pcmcia_configure_socket,
  88        .socket_suspend         = assabet_pcmcia_socket_suspend,
  89};
  90
  91int pcmcia_assabet_init(struct device *dev)
  92{
  93        int ret = -ENODEV;
  94
  95        if (machine_is_assabet() && !machine_has_neponset())
  96                ret = sa11xx_drv_pcmcia_probe(dev, &assabet_pcmcia_ops, 1, 1);
  97
  98        return ret;
  99}
 100