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/sched.h>
  10 #include <linux/device.h>
  11 #include <linux/errno.h>
  12 #include <linux/init.h>
  13
  14 #include <asm/hardware.h>
  15 #include <asm/hardware/sa1111.h>
  16 #include <asm/mach-types.h>
  17
  18 #include "sa1111_generic.h"
  19
  20 #define SOCKET0_POWER   GPIO_GPIO0
  21 #define SOCKET0_3V      GPIO_GPIO2
  22 #define SOCKET1_POWER   (GPIO_GPIO1 | GPIO_GPIO3)
  23 #warning *** Does SOCKET1_3V actually do anything?
  24 #define SOCKET1_3V      GPIO_GPIO3
  25
  26 static int jornada720_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
  27 {
  28   /*
  29    * What is all this crap for?
  30    */
  31   GRER |= 0x00000002;
  32   /* Set GPIO_A<3:1> to be outputs for PCMCIA/CF power controller: */
  33   sa1111_set_io_dir(SA1111_DEV(skt->dev), GPIO_A0|GPIO_A1|GPIO_A2|GPIO_A3, 0, 0);
  34   sa1111_set_io(SA1111_DEV(skt->dev), GPIO_A0|GPIO_A1|GPIO_A2|GPIO_A3, 0);
  35   sa1111_set_sleep_io(SA1111_DEV(skt->dev), GPIO_A0|GPIO_A1|GPIO_A2|GPIO_A3, 0);
  36
  37   return sa1111_pcmcia_hw_init(skt);
  38 }
  39
  40 static int
  41 jornada720_pcmcia_configure_socket(struct soc_pcmcia_socket *skt, const socket_state_t *state)
  42 {
  43   unsigned int pa_dwr_mask, pa_dwr_set;
  44   int ret;
  45
  46 printk("%s(): config socket %d vcc %d vpp %d\n", __FUNCTION__,
  47         skt->nr, state->Vcc, state->Vpp);
  48
  49   switch (skt->nr) {
  50   case 0:
  51     pa_dwr_mask = SOCKET0_POWER | SOCKET0_3V;
  52
  53     switch (state->Vcc) {
  54     default:
  55     case 0:     pa_dwr_set = 0;                                 break;
  56     case 33:    pa_dwr_set = SOCKET0_POWER | SOCKET0_3V;        break;
  57     case 50:    pa_dwr_set = SOCKET0_POWER;                     break;
  58     }
  59     break;
  60
  61   case 1:
  62     pa_dwr_mask = SOCKET1_POWER;
  63
  64     switch (state->Vcc) {
  65     default:
  66     case 0:     pa_dwr_set = 0;                                 break;
  67     case 33:    pa_dwr_set = SOCKET1_POWER;                     break;
  68     case 50:    pa_dwr_set = SOCKET1_POWER;                     break;
  69     }
  70     break;
  71
  72   default:
  73     return -1;
  74   }
  75
  76   if (state->Vpp != state->Vcc && state->Vpp != 0) {
  77     printk(KERN_ERR "%s(): slot cannot support VPP %u\n",
  78            __FUNCTION__, state->Vpp);
  79     return -1;
  80   }
  81
  82   ret = sa1111_pcmcia_configure_socket(skt, state);
  83   if (ret == 0) {
  84     unsigned long flags;
  85
  86     local_irq_save(flags);
  87     sa1111_set_io(SA1111_DEV(skt->dev), pa_dwr_mask, pa_dwr_set);
  88     local_irq_restore(flags);
  89   }
  90
  91   return ret;
  92 }
  93
  94 static struct pcmcia_low_level jornada720_pcmcia_ops = {
  95   .owner                = THIS_MODULE,
  96   .hw_init              = jornada720_pcmcia_hw_init,
  97   .hw_shutdown          = sa1111_pcmcia_hw_shutdown,
  98   .socket_state         = sa1111_pcmcia_socket_state,
  99   .configure_socket     = jornada720_pcmcia_configure_socket,
 100
 101   .socket_init          = sa1111_pcmcia_socket_init,
 102   .socket_suspend       = sa1111_pcmcia_socket_suspend,
 103 };
 104
 105 int __init pcmcia_jornada720_init(struct device *dev)
 106 {
 107         int ret = -ENODEV;
 108
 109         if (machine_is_jornada720())
 110                 ret = sa11xx_drv_pcmcia_probe(dev, &jornada720_pcmcia_ops, 0, 2);
 111
 112         return ret;
 113 }