linux/drivers/pcmcia/sa1100_assabet.c
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   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 void
  35assabet_pcmcia_socket_state(struct soc_pcmcia_socket *skt, struct pcmcia_state *state)
  36{
  37        state->vs_3v  = 1; /* Can only apply 3.3V on Assabet. */
  38        state->vs_Xv  = 0;
  39}
  40
  41static int
  42assabet_pcmcia_configure_socket(struct soc_pcmcia_socket *skt, const socket_state_t *state)
  43{
  44        unsigned int mask;
  45
  46        switch (state->Vcc) {
  47        case 0:
  48                mask = 0;
  49                break;
  50
  51        case 50:
  52                printk(KERN_WARNING "%s(): CS asked for 5V, applying 3.3V...\n",
  53                        __func__);
  54
  55        case 33:  /* Can only apply 3.3V to the CF slot. */
  56                mask = ASSABET_BCR_CF_PWR;
  57                break;
  58
  59        default:
  60                printk(KERN_ERR "%s(): unrecognized Vcc %u\n", __func__,
  61                        state->Vcc);
  62                return -1;
  63        }
  64
  65        /* Silently ignore Vpp, speaker enable. */
  66
  67        if (state->flags & SS_RESET)
  68                mask |= ASSABET_BCR_CF_RST;
  69        if (!(state->flags & SS_OUTPUT_ENA))
  70                mask |= ASSABET_BCR_CF_BUS_OFF;
  71
  72        ASSABET_BCR_frob(ASSABET_BCR_CF_RST | ASSABET_BCR_CF_PWR |
  73                        ASSABET_BCR_CF_BUS_OFF, mask);
  74
  75        return 0;
  76}
  77
  78/*
  79 * Disable card status IRQs on suspend.
  80 */
  81static void assabet_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt)
  82{
  83        /*
  84         * Tristate the CF bus signals.  Also assert CF
  85         * reset as per user guide page 4-11.
  86         */
  87        ASSABET_BCR_set(ASSABET_BCR_CF_BUS_OFF | ASSABET_BCR_CF_RST);
  88}
  89
  90static struct pcmcia_low_level assabet_pcmcia_ops = { 
  91        .owner                  = THIS_MODULE,
  92        .hw_init                = assabet_pcmcia_hw_init,
  93        .socket_state           = assabet_pcmcia_socket_state,
  94        .configure_socket       = assabet_pcmcia_configure_socket,
  95        .socket_suspend         = assabet_pcmcia_socket_suspend,
  96};
  97
  98int pcmcia_assabet_init(struct device *dev)
  99{
 100        int ret = -ENODEV;
 101
 102        if (machine_is_assabet() && !machine_has_neponset())
 103                ret = sa11xx_drv_pcmcia_probe(dev, &assabet_pcmcia_ops, 1, 1);
 104
 105        return ret;
 106}
 107
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