release/src-rt-6.x.4708/linux/linux-2.6.36/drivers/pcmcia/sa1100_shannon.c

   1 /*
   2  * drivers/pcmcia/sa1100_shannon.c
   3  *
   4  * PCMCIA implementation routines for Shannon
   5  *
   6  */
   7 #include <linux/module.h>
   8 #include <linux/kernel.h>
   9 #include <linux/device.h>
  10 #include <linux/init.h>
  11
  12 #include <mach/hardware.h>
  13 #include <asm/mach-types.h>
  14 #include <mach/shannon.h>
  15 #include <asm/irq.h>
  16 #include "sa1100_generic.h"
  17
  18 static struct pcmcia_irqs irqs[] = {
  19         { 0, SHANNON_IRQ_GPIO_EJECT_0, "PCMCIA_CD_0" },
  20         { 1, SHANNON_IRQ_GPIO_EJECT_1, "PCMCIA_CD_1" },
  21 };
  22
  23 static int shannon_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
  24 {
  25         /* All those are inputs */
  26         GPDR &= ~(SHANNON_GPIO_EJECT_0 | SHANNON_GPIO_EJECT_1 |
  27                   SHANNON_GPIO_RDY_0 | SHANNON_GPIO_RDY_1);
  28         GAFR &= ~(SHANNON_GPIO_EJECT_0 | SHANNON_GPIO_EJECT_1 |
  29                   SHANNON_GPIO_RDY_0 | SHANNON_GPIO_RDY_1);
  30
  31         skt->socket.pci_irq = skt->nr ? SHANNON_IRQ_GPIO_RDY_1 : SHANNON_IRQ_GPIO_RDY_0;
  32
  33         return soc_pcmcia_request_irqs(skt, irqs, ARRAY_SIZE(irqs));
  34 }
  35
  36 static void shannon_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt)
  37 {
  38         soc_pcmcia_free_irqs(skt, irqs, ARRAY_SIZE(irqs));
  39 }
  40
  41 static void
  42 shannon_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
  43                             struct pcmcia_state *state)
  44 {
  45         unsigned long levels = GPLR;
  46
  47         switch (skt->nr) {
  48         case 0:
  49                 state->detect = (levels & SHANNON_GPIO_EJECT_0) ? 0 : 1;
  50                 state->ready  = (levels & SHANNON_GPIO_RDY_0) ? 1 : 0;
  51                 state->wrprot = 0; /* Not available on Shannon. */
  52                 state->bvd1   = 1;
  53                 state->bvd2   = 1;
  54                 state->vs_3v  = 1;
  55                 state->vs_Xv  = 0;
  56                 break;
  57
  58         case 1:
  59                 state->detect = (levels & SHANNON_GPIO_EJECT_1) ? 0 : 1;
  60                 state->ready  = (levels & SHANNON_GPIO_RDY_1) ? 1 : 0;
  61                 state->wrprot = 0; /* Not available on Shannon. */
  62                 state->bvd1   = 1;
  63                 state->bvd2   = 1;
  64                 state->vs_3v  = 1;
  65                 state->vs_Xv  = 0;
  66                 break;
  67         }
  68 }
  69
  70 static int
  71 shannon_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
  72                                 const socket_state_t *state)
  73 {
  74         switch (state->Vcc) {
  75         case 0: /* power off */
  76                 printk(KERN_WARNING "%s(): CS asked for 0V, still applying 3.3V..\n", __func__);
  77                 break;
  78         case 50:
  79                 printk(KERN_WARNING "%s(): CS asked for 5V, applying 3.3V..\n", __func__);
  80         case 33:
  81                 break;
  82         default:
  83                 printk(KERN_ERR "%s(): unrecognized Vcc %u\n",
  84                        __func__, state->Vcc);
  85                 return -1;
  86         }
  87
  88         printk(KERN_WARNING "%s(): Warning, Can't perform reset\n", __func__);
  89
  90         /* Silently ignore Vpp, output enable, speaker enable. */
  91
  92         return 0;
  93 }
  94
  95 static void shannon_pcmcia_socket_init(struct soc_pcmcia_socket *skt)
  96 {
  97         soc_pcmcia_enable_irqs(skt, irqs, ARRAY_SIZE(irqs));
  98 }
  99
 100 static void shannon_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt)
 101 {
 102         soc_pcmcia_disable_irqs(skt, irqs, ARRAY_SIZE(irqs));
 103 }
 104
 105 static struct pcmcia_low_level shannon_pcmcia_ops = {
 106         .owner                  = THIS_MODULE,
 107         .hw_init                = shannon_pcmcia_hw_init,
 108         .hw_shutdown            = shannon_pcmcia_hw_shutdown,
 109         .socket_state           = shannon_pcmcia_socket_state,
 110         .configure_socket       = shannon_pcmcia_configure_socket,
 111
 112         .socket_init            = shannon_pcmcia_socket_init,
 113         .socket_suspend         = shannon_pcmcia_socket_suspend,
 114 };
 115
 116 int __init pcmcia_shannon_init(struct device *dev)
 117 {
 118         int ret = -ENODEV;
 119
 120         if (machine_is_shannon())
 121                 ret = sa11xx_drv_pcmcia_probe(dev, &shannon_pcmcia_ops, 0, 2);
 122
 123         return ret;
 124 }