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