kernel/2.6.29.6-aldebaran-rt/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 #define SOCKET0_POWER   GPIO_GPIO0
  20 #define SOCKET0_3V      GPIO_GPIO2
  21 #define SOCKET1_POWER   (GPIO_GPIO1 | GPIO_GPIO3)
  22 #warning *** Does SOCKET1_3V actually do anything?
  23 #define SOCKET1_3V      GPIO_GPIO3
  24
  25 static int jornada720_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
  26 {
  27   /*
  28    * What is all this crap for?
  29    */
  30   GRER |= 0x00000002;
  31   /* Set GPIO_A<3:1> to be outputs for PCMCIA/CF power controller: */
  32   sa1111_set_io_dir(SA1111_DEV(skt->dev), GPIO_A0|GPIO_A1|GPIO_A2|GPIO_A3, 0, 0);
  33   sa1111_set_io(SA1111_DEV(skt->dev), GPIO_A0|GPIO_A1|GPIO_A2|GPIO_A3, 0);
  34   sa1111_set_sleep_io(SA1111_DEV(skt->dev), GPIO_A0|GPIO_A1|GPIO_A2|GPIO_A3, 0);
  35
  36   return sa1111_pcmcia_hw_init(skt);
  37 }
  38
  39 static int
  40 jornada720_pcmcia_configure_socket(struct soc_pcmcia_socket *skt, const socket_state_t *state)
  41 {
  42   unsigned int pa_dwr_mask, pa_dwr_set;
  43   int ret;
  44
  45 printk("%s(): config socket %d vcc %d vpp %d\n", __func__,
  46         skt->nr, state->Vcc, state->Vpp);
  47
  48   switch (skt->nr) {
  49   case 0:
  50     pa_dwr_mask = SOCKET0_POWER | SOCKET0_3V;
  51
  52     switch (state->Vcc) {
  53     default:
  54     case 0:     pa_dwr_set = 0;                                 break;
  55     case 33:    pa_dwr_set = SOCKET0_POWER | SOCKET0_3V;        break;
  56     case 50:    pa_dwr_set = SOCKET0_POWER;                     break;
  57     }
  58     break;
  59
  60   case 1:
  61     pa_dwr_mask = SOCKET1_POWER;
  62
  63     switch (state->Vcc) {
  64     default:
  65     case 0:     pa_dwr_set = 0;                                 break;
  66     case 33:    pa_dwr_set = SOCKET1_POWER;                     break;
  67     case 50:    pa_dwr_set = SOCKET1_POWER;                     break;
  68     }
  69     break;
  70
  71   default:
  72     return -1;
  73   }
  74
  75   if (state->Vpp != state->Vcc && state->Vpp != 0) {
  76     printk(KERN_ERR "%s(): slot cannot support VPP %u\n",
  77            __func__, state->Vpp);
  78     return -1;
  79   }
  80
  81   ret = sa1111_pcmcia_configure_socket(skt, state);
  82   if (ret == 0) {
  83     unsigned long flags;
  84
  85     local_irq_save(flags);
  86     sa1111_set_io(SA1111_DEV(skt->dev), pa_dwr_mask, pa_dwr_set);
  87     local_irq_restore(flags);
  88   }
  89
  90   return ret;
  91 }
  92
  93 static struct pcmcia_low_level jornada720_pcmcia_ops = {
  94   .owner                = THIS_MODULE,
  95   .hw_init              = jornada720_pcmcia_hw_init,
  96   .hw_shutdown          = sa1111_pcmcia_hw_shutdown,
  97   .socket_state         = sa1111_pcmcia_socket_state,
  98   .configure_socket     = jornada720_pcmcia_configure_socket,
  99
 100   .socket_init          = sa1111_pcmcia_socket_init,
 101   .socket_suspend       = sa1111_pcmcia_socket_suspend,
 102 };
 103
 104 int __devinit pcmcia_jornada720_init(struct device *dev)
 105 {
 106         int ret = -ENODEV;
 107
 108         if (machine_is_jornada720())
 109                 ret = sa11xx_drv_pcmcia_probe(dev, &jornada720_pcmcia_ops, 0, 2);
 110
 111         return ret;
 112 }