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/config.h>
   9 #include <linux/module.h>
  10 #include <linux/kernel.h>
  11 #include <linux/sched.h>
  12 #include <linux/device.h>
  13 #include <linux/init.h>
  14 #include <linux/delay.h>
  15
  16 #include <asm/hardware.h>
  17 #include <asm/mach-types.h>
  18 #include <asm/irq.h>
  19 #include <asm/arch/cerf.h>
  20 #include "sa1100_generic.h"
  21
  22 #define CERF_SOCKET     1
  23
  24 static struct pcmcia_irqs irqs[] = {
  25         { CERF_SOCKET, CERF_IRQ_GPIO_CF_CD,   "CF_CD"   },
  26         { CERF_SOCKET, CERF_IRQ_GPIO_CF_BVD2, "CF_BVD2" },
  27         { CERF_SOCKET, CERF_IRQ_GPIO_CF_BVD1, "CF_BVD1" }
  28 };
  29
  30 static int cerf_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
  31 {
  32         skt->irq = CERF_IRQ_GPIO_CF_IRQ;
  33
  34         return soc_pcmcia_request_irqs(skt, irqs, ARRAY_SIZE(irqs));
  35 }
  36
  37 static void cerf_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt)
  38 {
  39         soc_pcmcia_free_irqs(skt, irqs, ARRAY_SIZE(irqs));
  40 }
  41
  42 static void
  43 cerf_pcmcia_socket_state(struct soc_pcmcia_socket *skt, struct pcmcia_state *state)
  44 {
  45         unsigned long levels = GPLR;
  46
  47         state->detect   = (levels & CERF_GPIO_CF_CD)  ?0:1;
  48         state->ready    = (levels & CERF_GPIO_CF_IRQ) ?1:0;
  49         state->bvd1     = (levels & CERF_GPIO_CF_BVD1)?1:0;
  50         state->bvd2     = (levels & CERF_GPIO_CF_BVD2)?1:0;
  51         state->wrprot   = 0;
  52         state->vs_3v    = 1;
  53         state->vs_Xv    = 0;
  54 }
  55
  56 static int
  57 cerf_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
  58                              const socket_state_t *state)
  59 {
  60         switch (state->Vcc) {
  61         case 0:
  62         case 50:
  63         case 33:
  64                 break;
  65
  66         default:
  67                 printk(KERN_ERR "%s(): unrecognized Vcc %u\n",
  68                         __FUNCTION__, state->Vcc);
  69                 return -1;
  70         }
  71
  72         if (state->flags & SS_RESET) {
  73                 GPSR = CERF_GPIO_CF_RESET;
  74         } else {
  75                 GPCR = CERF_GPIO_CF_RESET;
  76         }
  77
  78         return 0;
  79 }
  80
  81 static void cerf_pcmcia_socket_init(struct soc_pcmcia_socket *skt)
  82 {
  83         soc_pcmcia_enable_irqs(skt, irqs, ARRAY_SIZE(irqs));
  84 }
  85
  86 static void cerf_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt)
  87 {
  88         soc_pcmcia_disable_irqs(skt, irqs, ARRAY_SIZE(irqs));
  89 }
  90
  91 static struct pcmcia_low_level cerf_pcmcia_ops = {
  92         .owner                  = THIS_MODULE,
  93         .hw_init                = cerf_pcmcia_hw_init,
  94         .hw_shutdown            = cerf_pcmcia_hw_shutdown,
  95         .socket_state           = cerf_pcmcia_socket_state,
  96         .configure_socket       = cerf_pcmcia_configure_socket,
  97
  98         .socket_init            = cerf_pcmcia_socket_init,
  99         .socket_suspend         = cerf_pcmcia_socket_suspend,
 100 };
 101
 102 int __init pcmcia_cerf_init(struct device *dev)
 103 {
 104         int ret = -ENODEV;
 105
 106         if (machine_is_cerf())
 107                 ret = sa11xx_drv_pcmcia_probe(dev, &cerf_pcmcia_ops, CERF_SOCKET, 1);
 108
 109         return ret;
 110 }