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 jornada720_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
  26 {
  27         unsigned int pin = GPIO_A0 | GPIO_A1 | GPIO_A2 | GPIO_A3;
  28
  29         /*
  30         * What is all this crap for?
  31         */
  32         GRER |= 0x00000002;
  33         /* Set GPIO_A<3:1> to be outputs for PCMCIA/CF power controller: */
  34         sa1111_set_io_dir(SA1111_DEV(skt->dev), pin, 0, 0);
  35         sa1111_set_io(SA1111_DEV(skt->dev), pin, 0);
  36         sa1111_set_sleep_io(SA1111_DEV(skt->dev), pin, 0);
  37
  38         return sa1111_pcmcia_hw_init(skt);
  39 }
  40
  41 static int
  42 jornada720_pcmcia_configure_socket(struct soc_pcmcia_socket *skt, const socket_state_t *state)
  43 {
  44         unsigned int pa_dwr_mask, pa_dwr_set;
  45         int ret;
  46
  47         printk(KERN_INFO "%s(): config socket %d vcc %d vpp %d\n", __func__,
  48                 skt->nr, state->Vcc, state->Vpp);
  49
  50         switch (skt->nr) {
  51         case 0:
  52                 pa_dwr_mask = SOCKET0_POWER | SOCKET0_3V;
  53
  54                 switch (state->Vcc) {
  55                 default:
  56                 case  0:
  57                         pa_dwr_set = 0;
  58                         break;
  59                 case 33:
  60                         pa_dwr_set = SOCKET0_POWER | SOCKET0_3V;
  61                         break;
  62                 case 50:
  63                         pa_dwr_set = SOCKET0_POWER;
  64                         break;
  65                 }
  66                 break;
  67
  68         case 1:
  69                 pa_dwr_mask = SOCKET1_POWER;
  70
  71                 switch (state->Vcc) {
  72                 default:
  73                 case 0:
  74                         pa_dwr_set = 0;
  75                         break;
  76                 case 33:
  77                         pa_dwr_set = SOCKET1_POWER;
  78                         break;
  79                 case 50:
  80                         pa_dwr_set = SOCKET1_POWER;
  81                         break;
  82                 }
  83                 break;
  84
  85         default:
  86                 return -1;
  87         }
  88
  89         if (state->Vpp != state->Vcc && state->Vpp != 0) {
  90                 printk(KERN_ERR "%s(): slot cannot support VPP %u\n",
  91                         __func__, state->Vpp);
  92                 return -EPERM;
  93         }
  94
  95         ret = sa1111_pcmcia_configure_socket(skt, state);
  96         if (ret == 0) {
  97                 unsigned long flags;
  98
  99                 local_irq_save(flags);
 100                 sa1111_set_io(SA1111_DEV(skt->dev), pa_dwr_mask, pa_dwr_set);
 101                 local_irq_restore(flags);
 102         }
 103
 104         return ret;
 105 }
 106
 107 static struct pcmcia_low_level jornada720_pcmcia_ops = {
 108         .owner                  = THIS_MODULE,
 109         .hw_init                = jornada720_pcmcia_hw_init,
 110         .hw_shutdown            = sa1111_pcmcia_hw_shutdown,
 111         .socket_state           = sa1111_pcmcia_socket_state,
 112         .configure_socket       = jornada720_pcmcia_configure_socket,
 113
 114         .socket_init            = sa1111_pcmcia_socket_init,
 115         .socket_suspend         = sa1111_pcmcia_socket_suspend,
 116 };
 117
 118 int __devinit pcmcia_jornada720_init(struct device *dev)
 119 {
 120         int ret = -ENODEV;
 121
 122         if (machine_is_jornada720())
 123                 ret = sa11xx_drv_pcmcia_probe(dev, &jornada720_pcmcia_ops, 0, 2);
 124
 125         return ret;
 126 }