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
  14#include <mach/hardware.h>
  15#include <asm/mach-types.h>
  16#include <asm/irq.h>
  17#include <mach/cerf.h>
  18#include "sa1100_generic.h"
  19
  20#define CERF_SOCKET     1
  21
  22static struct pcmcia_irqs irqs[] = {
  23        { CERF_SOCKET, CERF_IRQ_GPIO_CF_CD,   "CF_CD"   },
  24        { CERF_SOCKET, CERF_IRQ_GPIO_CF_BVD2, "CF_BVD2" },
  25        { CERF_SOCKET, CERF_IRQ_GPIO_CF_BVD1, "CF_BVD1" }
  26};
  27
  28static int cerf_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
  29{
  30        skt->socket.pci_irq = CERF_IRQ_GPIO_CF_IRQ;
  31
  32        return soc_pcmcia_request_irqs(skt, irqs, ARRAY_SIZE(irqs));
  33}
  34
  35static void cerf_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt)
  36{
  37        soc_pcmcia_free_irqs(skt, irqs, ARRAY_SIZE(irqs));
  38}
  39
  40static void
  41cerf_pcmcia_socket_state(struct soc_pcmcia_socket *skt, struct pcmcia_state *state)
  42{
  43        unsigned long levels = GPLR;
  44
  45        state->detect   = (levels & CERF_GPIO_CF_CD)  ?0:1;
  46        state->ready    = (levels & CERF_GPIO_CF_IRQ) ?1:0;
  47        state->bvd1     = (levels & CERF_GPIO_CF_BVD1)?1:0;
  48        state->bvd2     = (levels & CERF_GPIO_CF_BVD2)?1:0;
  49        state->wrprot   = 0;
  50        state->vs_3v    = 1;
  51        state->vs_Xv    = 0;
  52}
  53
  54static int
  55cerf_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
  56                             const socket_state_t *state)
  57{
  58        switch (state->Vcc) {
  59        case 0:
  60        case 50:
  61        case 33:
  62                break;
  63
  64        default:
  65                printk(KERN_ERR "%s(): unrecognized Vcc %u\n",
  66                        __func__, state->Vcc);
  67                return -1;
  68        }
  69
  70        if (state->flags & SS_RESET) {
  71                GPSR = CERF_GPIO_CF_RESET;
  72        } else {
  73                GPCR = CERF_GPIO_CF_RESET;
  74        }
  75
  76        return 0;
  77}
  78
  79static void cerf_pcmcia_socket_init(struct soc_pcmcia_socket *skt)
  80{
  81        soc_pcmcia_enable_irqs(skt, irqs, ARRAY_SIZE(irqs));
  82}
  83
  84static void cerf_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt)
  85{
  86        soc_pcmcia_disable_irqs(skt, irqs, ARRAY_SIZE(irqs));
  87}
  88
  89static struct pcmcia_low_level cerf_pcmcia_ops = { 
  90        .owner                  = THIS_MODULE,
  91        .hw_init                = cerf_pcmcia_hw_init,
  92        .hw_shutdown            = cerf_pcmcia_hw_shutdown,
  93        .socket_state           = cerf_pcmcia_socket_state,
  94        .configure_socket       = cerf_pcmcia_configure_socket,
  95
  96        .socket_init            = cerf_pcmcia_socket_init,
  97        .socket_suspend         = cerf_pcmcia_socket_suspend,
  98};
  99
 100int __devinit pcmcia_cerf_init(struct device *dev)
 101{
 102        int ret = -ENODEV;
 103
 104        if (machine_is_cerf())
 105                ret = sa11xx_drv_pcmcia_probe(dev, &cerf_pcmcia_ops, CERF_SOCKET, 1);
 106
 107        return ret;
 108}
 109