drivers/pcmcia/sa1100_adsbitsy.c

   1 /*
   2  * drivers/pcmcia/sa1100_adsbitsy.c
   3  *
   4  * PCMCIA implementation routines for ADS Bitsy
   5  *
   6  * 9/18/01 Woojung
   7  *         Fixed wrong PCMCIA voltage setting
   8  *
   9  * 7/5/01 Woojung Huh <whuh@applieddata.net>
  10  *
  11  */
  12 #include <linux/module.h>
  13 #include <linux/kernel.h>
  14 #include <linux/sched.h>
  15 #include <linux/device.h>
  16 #include <linux/init.h>
  17
  18 #include <asm/hardware.h>
  19 #include <asm/mach-types.h>
  20
  21 #include "sa1111_generic.h"
  22
  23 static int adsbitsy_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
  24 {
  25         /* Set GPIO_A<3:0> to be outputs for PCMCIA/CF power controller: */
  26         PA_DDR &= ~(GPIO_GPIO0 | GPIO_GPIO1 | GPIO_GPIO2 | GPIO_GPIO3);
  27
  28         /* Disable Power 3.3V/5V for PCMCIA/CF */
  29         PA_DWR |= GPIO_GPIO0 | GPIO_GPIO1 | GPIO_GPIO2 | GPIO_GPIO3;
  30
  31         /* Why? */
  32         MECR = 0x09430943;
  33
  34         return sa1111_pcmcia_init(skt);
  35 }
  36
  37 static int
  38 adsbitsy_pcmcia_configure_socket(struct soc_pcmcia_socket *skt, const socket_state_t *state)
  39 {
  40         unsigned int pa_dwr_mask, pa_dwr_set;
  41         int ret;
  42
  43         switch (skt->nr) {
  44         case 0:
  45                 pa_dwr_mask = GPIO_GPIO0 | GPIO_GPIO1;
  46
  47                 switch (state->Vcc) {
  48                 default:
  49                 case 0:  pa_dwr_set = GPIO_GPIO0 | GPIO_GPIO1;  break;
  50                 case 33: pa_dwr_set = GPIO_GPIO1;               break;
  51                 case 50: pa_dwr_set = GPIO_GPIO0;               break;
  52                 }
  53                 break;
  54
  55         case 1:
  56                 pa_dwr_mask = GPIO_GPIO2 | GPIO_GPIO3;
  57
  58                 switch (state->Vcc) {
  59                 default:
  60                 case 0:  pa_dwr_set = 0;                        break;
  61                 case 33: pa_dwr_set = GPIO_GPIO2;               break;
  62                 case 50: pa_dwr_set = GPIO_GPIO3;               break;
  63                 }
  64
  65         default:
  66                 return -1;
  67         }
  68
  69         if (state->Vpp != state->Vcc && state->Vpp != 0) {
  70                 printk(KERN_ERR "%s(): CF slot cannot support VPP %u\n",
  71                         __FUNCTION__, state->Vpp);
  72                 return -1;
  73         }
  74
  75         ret = sa1111_pcmcia_configure_socket(skt, state);
  76         if (ret == 0) {
  77                 unsigned long flags;
  78
  79                 local_irq_save(flags);
  80                 PA_DWR = (PA_DWR & ~pa_dwr_mask) | pa_dwr_set;
  81                 local_irq_restore(flags);
  82         }
  83
  84         return ret;
  85 }
  86
  87 static struct pcmcia_low_level adsbitsy_pcmcia_ops = {
  88         .owner                  = THIS_MODULE,
  89         .hw_init                = adsbitsy_pcmcia_hw_init,
  90         .hw_shutdown            = sa1111_pcmcia_hw_shutdown,
  91         .socket_state           = sa1111_pcmcia_socket_state,
  92         .configure_socket       = adsbitsy_pcmcia_configure_socket,
  93         .socket_init            = sa1111_pcmcia_socket_init,
  94         .socket_suspend         = sa1111_pcmcia_socket_suspend,
  95 };
  96
  97 int __init pcmcia_adsbitsy_init(struct device *dev)
  98 {
  99         int ret = -ENODEV;
 100         if (machine_is_adsbitsy())
 101                 ret = sa11xx_drv_pcmcia_probe(dev, &adsbitsy_pcmcia_ops, 0, 2);
 102         return ret;
 103 }