drivers/pcmcia/sa1100_shannon.c

   1 /*
   2  * drivers/pcmcia/sa1100_shannon.c
   3  *
   4  * PCMCIA implementation routines for Shannon
   5  *
   6  */
   7 #include <linux/module.h>
   8 #include <linux/kernel.h>
   9 #include <linux/device.h>
  10 #include <linux/init.h>
  11 #include <linux/io.h>
  12
  13 #include <mach/hardware.h>
  14 #include <asm/mach-types.h>
  15 #include <mach/shannon.h>
  16 #include <asm/irq.h>
  17 #include "sa1100_generic.h"
  18
  19 static int shannon_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
  20 {
  21         /* All those are inputs */
  22         GAFR &= ~(GPIO_GPIO(SHANNON_GPIO_EJECT_0) |
  23                   GPIO_GPIO(SHANNON_GPIO_EJECT_1) |
  24                   GPIO_GPIO(SHANNON_GPIO_RDY_0) |
  25                   GPIO_GPIO(SHANNON_GPIO_RDY_1));
  26
  27         if (skt->nr == 0) {
  28                 skt->stat[SOC_STAT_CD].gpio = SHANNON_GPIO_EJECT_0;
  29                 skt->stat[SOC_STAT_CD].name = "PCMCIA_CD_0";
  30                 skt->stat[SOC_STAT_RDY].gpio = SHANNON_GPIO_RDY_0;
  31                 skt->stat[SOC_STAT_RDY].name = "PCMCIA_RDY_0";
  32         } else {
  33                 skt->stat[SOC_STAT_CD].gpio = SHANNON_GPIO_EJECT_1;
  34                 skt->stat[SOC_STAT_CD].name = "PCMCIA_CD_1";
  35                 skt->stat[SOC_STAT_RDY].gpio = SHANNON_GPIO_RDY_1;
  36                 skt->stat[SOC_STAT_RDY].name = "PCMCIA_RDY_1";
  37         }
  38
  39         return 0;
  40 }
  41
  42 static void
  43 shannon_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
  44                             struct pcmcia_state *state)
  45 {
  46         switch (skt->nr) {
  47         case 0:
  48                 state->bvd1   = 1;
  49                 state->bvd2   = 1;
  50                 state->vs_3v  = 1; /* FIXME Can only apply 3.3V on Shannon. */
  51                 state->vs_Xv  = 0;
  52                 break;
  53
  54         case 1:
  55                 state->bvd1   = 1;
  56                 state->bvd2   = 1;
  57                 state->vs_3v  = 1; /* FIXME Can only apply 3.3V on Shannon. */
  58                 state->vs_Xv  = 0;
  59                 break;
  60         }
  61 }
  62
  63 static int
  64 shannon_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
  65                                 const socket_state_t *state)
  66 {
  67         switch (state->Vcc) {
  68         case 0: /* power off */
  69                 printk(KERN_WARNING "%s(): CS asked for 0V, still applying 3.3V..\n", __func__);
  70                 break;
  71         case 50:
  72                 printk(KERN_WARNING "%s(): CS asked for 5V, applying 3.3V..\n", __func__);
  73         case 33:
  74                 break;
  75         default:
  76                 printk(KERN_ERR "%s(): unrecognized Vcc %u\n",
  77                        __func__, state->Vcc);
  78                 return -1;
  79         }
  80
  81         printk(KERN_WARNING "%s(): Warning, Can't perform reset\n", __func__);
  82
  83         /* Silently ignore Vpp, output enable, speaker enable. */
  84
  85         return 0;
  86 }
  87
  88 static struct pcmcia_low_level shannon_pcmcia_ops = {
  89         .owner                  = THIS_MODULE,
  90         .hw_init                = shannon_pcmcia_hw_init,
  91         .socket_state           = shannon_pcmcia_socket_state,
  92         .configure_socket       = shannon_pcmcia_configure_socket,
  93 };
  94
  95 int pcmcia_shannon_init(struct device *dev)
  96 {
  97         int ret = -ENODEV;
  98
  99         if (machine_is_shannon())
 100                 ret = sa11xx_drv_pcmcia_probe(dev, &shannon_pcmcia_ops, 0, 2);
 101
 102         return ret;
 103 }