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