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   PA_DDR = 0;
  34   PA_DWR = 0;
  35   PA_SDR = 0;
  36   PA_SSR = 0;
  37
  38   PB_DDR = 0;
  39   PB_DWR = 0x01;
  40   PB_SDR = 0;
  41   PB_SSR = 0;
  42
  43   PC_DDR = 0x88;
  44   PC_DWR = 0x20;
  45   PC_SDR = 0;
  46   PC_SSR = 0;
  47
  48   return sa1111_pcmcia_hw_init(skt);
  49 }
  50
  51 static int
  52 jornada720_pcmcia_configure_socket(struct soc_pcmcia_socket *skt, const socket_state_t *state)
  53 {
  54   unsigned int pa_dwr_mask, pa_dwr_set;
  55   int ret;
  56
  57 printk("%s(): config socket %d vcc %d vpp %d\n", __FUNCTION__,
  58         skt->nr, state->Vcc, state->Vpp);
  59
  60   switch (skt->nr) {
  61   case 0:
  62     pa_dwr_mask = SOCKET0_POWER | SOCKET0_3V;
  63
  64     switch (state->Vcc) {
  65     default:
  66     case 0:     pa_dwr_set = 0;                                 break;
  67     case 33:    pa_dwr_set = SOCKET0_POWER | SOCKET0_3V;        break;
  68     case 50:    pa_dwr_set = SOCKET0_POWER;                     break;
  69     }
  70     break;
  71
  72   case 1:
  73     pa_dwr_mask = SOCKET1_POWER;
  74
  75     switch (state->Vcc) {
  76     default:
  77     case 0:     pa_dwr_set = 0;                                 break;
  78     case 33:    pa_dwr_set = SOCKET1_POWER;                     break;
  79     case 50:    pa_dwr_set = SOCKET1_POWER;                     break;
  80     }
  81     break;
  82
  83   default:
  84     return -1;
  85   }
  86
  87   if (state->Vpp != state->Vcc && state->Vpp != 0) {
  88     printk(KERN_ERR "%s(): slot cannot support VPP %u\n",
  89            __FUNCTION__, state->Vpp);
  90     return -1;
  91   }
  92
  93   ret = sa1111_pcmcia_configure_socket(skt, state);
  94   if (ret == 0) {
  95     unsigned long flags;
  96
  97     local_irq_save(flags);
  98     PA_DWR = (PA_DWR & ~pa_dwr_mask) | pa_dwr_set;
  99     local_irq_restore(flags);
 100   }
 101
 102   return ret;
 103 }
 104
 105 static struct pcmcia_low_level jornada720_pcmcia_ops = {
 106   .owner                = THIS_MODULE,
 107   .hw_init              = jornada720_pcmcia_hw_init,
 108   .hw_shutdown          = sa1111_pcmcia_hw_shutdown,
 109   .socket_state         = sa1111_pcmcia_socket_state,
 110   .configure_socket     = jornada720_pcmcia_configure_socket,
 111
 112   .socket_init          = sa1111_pcmcia_socket_init,
 113   .socket_suspend       = sa1111_pcmcia_socket_suspend,
 114 };
 115
 116 int __init pcmcia_jornada720_init(struct device *dev)
 117 {
 118         int ret = -ENODEV;
 119
 120         if (machine_is_jornada720())
 121                 ret = sa11xx_drv_pcmcia_probe(dev, &jornada720_pcmcia_ops, 0, 2);
 122
 123         return ret;
 124 }