drivers/pcmcia/sa1100_cerf.c

   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
  23 static 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
  43 static void cerf_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt)
  44 {
  45         gpio_free(CERF_GPIO_CF_RESET);
  46 }
  47
  48 static void
  49 cerf_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
  55 static int
  56 cerf_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
  76 static 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
  84 int 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 }