linux/drivers/pcmcia/sa1100_h3600.c
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   1/*
   2 * drivers/pcmcia/sa1100_h3600.c
   3 *
   4 * PCMCIA implementation routines for H3600
   5 *
   6 */
   7#include <linux/module.h>
   8#include <linux/kernel.h>
   9#include <linux/device.h>
  10#include <linux/interrupt.h>
  11#include <linux/init.h>
  12#include <linux/delay.h>
  13
  14#include <mach/hardware.h>
  15#include <asm/irq.h>
  16#include <asm/mach-types.h>
  17#include <mach/h3600.h>
  18
  19#include "sa1100_generic.h"
  20
  21static struct pcmcia_irqs irqs[] = {
  22        { 0, IRQ_GPIO_H3600_PCMCIA_CD0, "PCMCIA CD0" },
  23        { 1, IRQ_GPIO_H3600_PCMCIA_CD1, "PCMCIA CD1" }
  24};
  25
  26static int h3600_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
  27{
  28        skt->irq = skt->nr ? IRQ_GPIO_H3600_PCMCIA_IRQ1
  29                           : IRQ_GPIO_H3600_PCMCIA_IRQ0;
  30
  31
  32        return soc_pcmcia_request_irqs(skt, irqs, ARRAY_SIZE(irqs));
  33}
  34
  35static void h3600_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt)
  36{
  37        soc_pcmcia_free_irqs(skt, irqs, ARRAY_SIZE(irqs));
  38  
  39        /* Disable CF bus: */
  40        clr_h3600_egpio(IPAQ_EGPIO_OPT_NVRAM_ON);
  41        clr_h3600_egpio(IPAQ_EGPIO_OPT_ON);
  42        set_h3600_egpio(IPAQ_EGPIO_OPT_RESET);
  43}
  44
  45static void
  46h3600_pcmcia_socket_state(struct soc_pcmcia_socket *skt, struct pcmcia_state *state)
  47{
  48        unsigned long levels = GPLR;
  49
  50        switch (skt->nr) {
  51        case 0:
  52                state->detect = levels & GPIO_H3600_PCMCIA_CD0 ? 0 : 1;
  53                state->ready = levels & GPIO_H3600_PCMCIA_IRQ0 ? 1 : 0;
  54                state->bvd1 = 0;
  55                state->bvd2 = 0;
  56                state->wrprot = 0; /* Not available on H3600. */
  57                state->vs_3v = 0;
  58                state->vs_Xv = 0;
  59                break;
  60
  61        case 1:
  62                state->detect = levels & GPIO_H3600_PCMCIA_CD1 ? 0 : 1;
  63                state->ready = levels & GPIO_H3600_PCMCIA_IRQ1 ? 1 : 0;
  64                state->bvd1 = 0;
  65                state->bvd2 = 0;
  66                state->wrprot = 0; /* Not available on H3600. */
  67                state->vs_3v = 0;
  68                state->vs_Xv = 0;
  69                break;
  70        }
  71}
  72
  73static int
  74h3600_pcmcia_configure_socket(struct soc_pcmcia_socket *skt, const socket_state_t *state)
  75{
  76        if (state->Vcc != 0 && state->Vcc != 33 && state->Vcc != 50) {
  77                printk(KERN_ERR "h3600_pcmcia: unrecognized Vcc %u.%uV\n",
  78                       state->Vcc / 10, state->Vcc % 10);
  79                return -1;
  80        }
  81
  82        if (state->flags & SS_RESET)
  83                set_h3600_egpio(IPAQ_EGPIO_CARD_RESET);
  84        else
  85                clr_h3600_egpio(IPAQ_EGPIO_CARD_RESET);
  86
  87        /* Silently ignore Vpp, output enable, speaker enable. */
  88
  89        return 0;
  90}
  91
  92static void h3600_pcmcia_socket_init(struct soc_pcmcia_socket *skt)
  93{
  94        /* Enable CF bus: */
  95        set_h3600_egpio(IPAQ_EGPIO_OPT_NVRAM_ON);
  96        set_h3600_egpio(IPAQ_EGPIO_OPT_ON);
  97        clr_h3600_egpio(IPAQ_EGPIO_OPT_RESET);
  98
  99        msleep(10);
 100
 101        soc_pcmcia_enable_irqs(skt, irqs, ARRAY_SIZE(irqs));
 102}
 103
 104static void h3600_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt)
 105{
 106        soc_pcmcia_disable_irqs(skt, irqs, ARRAY_SIZE(irqs));
 107
 108        /*
 109         * FIXME:  This doesn't fit well.  We don't have the mechanism in
 110         * the generic PCMCIA layer to deal with the idea of two sockets
 111         * on one bus.  We rely on the cs.c behaviour shutting down
 112         * socket 0 then socket 1.
 113         */
 114        if (skt->nr == 1) {
 115                clr_h3600_egpio(IPAQ_EGPIO_OPT_ON);
 116                clr_h3600_egpio(IPAQ_EGPIO_OPT_NVRAM_ON);
 117                /* hmm, does this suck power? */
 118                set_h3600_egpio(IPAQ_EGPIO_OPT_RESET);
 119        }
 120}
 121
 122struct pcmcia_low_level h3600_pcmcia_ops = { 
 123        .owner                  = THIS_MODULE,
 124        .hw_init                = h3600_pcmcia_hw_init,
 125        .hw_shutdown            = h3600_pcmcia_hw_shutdown,
 126        .socket_state           = h3600_pcmcia_socket_state,
 127        .configure_socket       = h3600_pcmcia_configure_socket,
 128
 129        .socket_init            = h3600_pcmcia_socket_init,
 130        .socket_suspend         = h3600_pcmcia_socket_suspend,
 131};
 132
 133int __init pcmcia_h3600_init(struct device *dev)
 134{
 135        int ret = -ENODEV;
 136
 137        if (machine_is_h3600())
 138                ret = sa11xx_drv_pcmcia_probe(dev, &h3600_pcmcia_ops, 0, 2);
 139
 140        return ret;
 141}
 142