release/src-rt-6.x.4708/linux/linux-2.6.36/drivers/pcmcia/sa1100_jornada720.c

   1 /*
   2  * drivers/pcmcia/sa1100_jornada720.c
   3  *
   4  * Jornada720 PCMCIA specific routines
   5  *
   6  */
   7 #include <linux/module.h>
   8 #include <linux/kernel.h>
   9 #include <linux/device.h>
  10 #include <linux/errno.h>
  11 #include <linux/init.h>
  12
  13 #include <mach/hardware.h>
  14 #include <asm/hardware/sa1111.h>
  15 #include <asm/mach-types.h>
  16
  17 #include "sa1111_generic.h"
  18
  19 /* Does SOCKET1_3V actually do anything? */
  20 #define SOCKET0_POWER   GPIO_GPIO0
  21 #define SOCKET0_3V      GPIO_GPIO2
  22 #define SOCKET1_POWER   (GPIO_GPIO1 | GPIO_GPIO3)
  23 #define SOCKET1_3V      GPIO_GPIO3
  24
  25 static int
  26 jornada720_pcmcia_configure_socket(struct soc_pcmcia_socket *skt, const socket_state_t *state)
  27 {
  28         struct sa1111_pcmcia_socket *s = to_skt(skt);
  29         unsigned int pa_dwr_mask, pa_dwr_set;
  30         int ret;
  31
  32         printk(KERN_INFO "%s(): config socket %d vcc %d vpp %d\n", __func__,
  33                 skt->nr, state->Vcc, state->Vpp);
  34
  35         switch (skt->nr) {
  36         case 0:
  37                 pa_dwr_mask = SOCKET0_POWER | SOCKET0_3V;
  38
  39                 switch (state->Vcc) {
  40                 default:
  41                 case  0:
  42                         pa_dwr_set = 0;
  43                         break;
  44                 case 33:
  45                         pa_dwr_set = SOCKET0_POWER | SOCKET0_3V;
  46                         break;
  47                 case 50:
  48                         pa_dwr_set = SOCKET0_POWER;
  49                         break;
  50                 }
  51                 break;
  52
  53         case 1:
  54                 pa_dwr_mask = SOCKET1_POWER;
  55
  56                 switch (state->Vcc) {
  57                 default:
  58                 case 0:
  59                         pa_dwr_set = 0;
  60                         break;
  61                 case 33:
  62                         pa_dwr_set = SOCKET1_POWER;
  63                         break;
  64                 case 50:
  65                         pa_dwr_set = SOCKET1_POWER;
  66                         break;
  67                 }
  68                 break;
  69
  70         default:
  71                 return -1;
  72         }
  73
  74         if (state->Vpp != state->Vcc && state->Vpp != 0) {
  75                 printk(KERN_ERR "%s(): slot cannot support VPP %u\n",
  76                         __func__, state->Vpp);
  77                 return -EPERM;
  78         }
  79
  80         ret = sa1111_pcmcia_configure_socket(skt, state);
  81         if (ret == 0) {
  82                 unsigned long flags;
  83
  84                 local_irq_save(flags);
  85                 sa1111_set_io(s->dev, pa_dwr_mask, pa_dwr_set);
  86                 local_irq_restore(flags);
  87         }
  88
  89         return ret;
  90 }
  91
  92 static struct pcmcia_low_level jornada720_pcmcia_ops = {
  93         .owner                  = THIS_MODULE,
  94         .configure_socket       = jornada720_pcmcia_configure_socket,
  95         .socket_init            = sa1111_pcmcia_socket_init,
  96         .first                  = 0,
  97         .nr                     = 2,
  98 };
  99
 100 int __devinit pcmcia_jornada720_init(struct device *dev)
 101 {
 102         int ret = -ENODEV;
 103
 104         if (machine_is_jornada720()) {
 105                 unsigned int pin = GPIO_A0 | GPIO_A1 | GPIO_A2 | GPIO_A3;
 106
 107                 GRER |= 0x00000002;
 108
 109                 /* Set GPIO_A<3:1> to be outputs for PCMCIA/CF power controller: */
 110                 sa1111_set_io_dir(dev, pin, 0, 0);
 111                 sa1111_set_io(dev, pin, 0);
 112                 sa1111_set_sleep_io(dev, pin, 0);
 113
 114                 sa11xx_drv_pcmcia_ops(&jornada720_pcmcia_ops);
 115                 ret = sa1111_pcmcia_add(dev, &jornada720_pcmcia_ops,
 116                                 sa11xx_drv_pcmcia_add_one);
 117         }
 118
 119         return ret;
 120 }