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/sched.h>
  10 #include <linux/device.h>
  11 #include <linux/init.h>
  12
  13 #include <asm/hardware.h>
  14 #include <asm/mach-types.h>
  15 #include <asm/arch/shannon.h>
  16 #include <asm/irq.h>
  17 #include "sa1100_generic.h"
  18
  19 static struct pcmcia_irqs irqs[] = {
  20         { 0, SHANNON_IRQ_GPIO_EJECT_0, "PCMCIA_CD_0" },
  21         { 1, SHANNON_IRQ_GPIO_EJECT_1, "PCMCIA_CD_1" },
  22 };
  23
  24 static int shannon_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
  25 {
  26         /* All those are inputs */
  27         GPDR &= ~(SHANNON_GPIO_EJECT_0 | SHANNON_GPIO_EJECT_1 |
  28                   SHANNON_GPIO_RDY_0 | SHANNON_GPIO_RDY_1);
  29         GAFR &= ~(SHANNON_GPIO_EJECT_0 | SHANNON_GPIO_EJECT_1 |
  30                   SHANNON_GPIO_RDY_0 | SHANNON_GPIO_RDY_1);
  31
  32         skt->irq = skt->nr ? SHANNON_IRQ_GPIO_RDY_1 : SHANNON_IRQ_GPIO_RDY_0;
  33
  34         return soc_pcmcia_request_irqs(skt, irqs, ARRAY_SIZE(irqs));
  35 }
  36
  37 static void shannon_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt)
  38 {
  39         soc_pcmcia_free_irqs(skt, irqs, ARRAY_SIZE(irqs));
  40 }
  41
  42 static void
  43 shannon_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
  44                             struct pcmcia_state *state)
  45 {
  46         unsigned long levels = GPLR;
  47
  48         switch (skt->nr) {
  49         case 0:
  50                 state->detect = (levels & SHANNON_GPIO_EJECT_0) ? 0 : 1;
  51                 state->ready  = (levels & SHANNON_GPIO_RDY_0) ? 1 : 0;
  52                 state->wrprot = 0; /* Not available on Shannon. */
  53                 state->bvd1   = 1;
  54                 state->bvd2   = 1;
  55                 state->vs_3v  = 1; /* FIXME Can only apply 3.3V on Shannon. */
  56                 state->vs_Xv  = 0;
  57                 break;
  58
  59         case 1:
  60                 state->detect = (levels & SHANNON_GPIO_EJECT_1) ? 0 : 1;
  61                 state->ready  = (levels & SHANNON_GPIO_RDY_1) ? 1 : 0;
  62                 state->wrprot = 0; /* Not available on Shannon. */
  63                 state->bvd1   = 1;
  64                 state->bvd2   = 1;
  65                 state->vs_3v  = 1; /* FIXME Can only apply 3.3V on Shannon. */
  66                 state->vs_Xv  = 0;
  67                 break;
  68         }
  69 }
  70
  71 static int
  72 shannon_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
  73                                 const socket_state_t *state)
  74 {
  75         switch (state->Vcc) {
  76         case 0: /* power off */
  77                 printk(KERN_WARNING "%s(): CS asked for 0V, still applying 3.3V..\n", __FUNCTION__);
  78                 break;
  79         case 50:
  80                 printk(KERN_WARNING "%s(): CS asked for 5V, applying 3.3V..\n", __FUNCTION__);
  81         case 33:
  82                 break;
  83         default:
  84                 printk(KERN_ERR "%s(): unrecognized Vcc %u\n",
  85                        __FUNCTION__, state->Vcc);
  86                 return -1;
  87         }
  88
  89         printk(KERN_WARNING "%s(): Warning, Can't perform reset\n", __FUNCTION__);
  90
  91         /* Silently ignore Vpp, output enable, speaker enable. */
  92
  93         return 0;
  94 }
  95
  96 static void shannon_pcmcia_socket_init(struct soc_pcmcia_socket *skt)
  97 {
  98         soc_pcmcia_enable_irqs(skt, irqs, ARRAY_SIZE(irqs));
  99 }
 100
 101 static void shannon_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt)
 102 {
 103         soc_pcmcia_disable_irqs(skt, irqs, ARRAY_SIZE(irqs));
 104 }
 105
 106 static struct pcmcia_low_level shannon_pcmcia_ops = {
 107         .owner                  = THIS_MODULE,
 108         .hw_init                = shannon_pcmcia_hw_init,
 109         .hw_shutdown            = shannon_pcmcia_hw_shutdown,
 110         .socket_state           = shannon_pcmcia_socket_state,
 111         .configure_socket       = shannon_pcmcia_configure_socket,
 112
 113         .socket_init            = shannon_pcmcia_socket_init,
 114         .socket_suspend         = shannon_pcmcia_socket_suspend,
 115 };
 116
 117 int __init pcmcia_shannon_init(struct device *dev)
 118 {
 119         int ret = -ENODEV;
 120
 121         if (machine_is_shannon())
 122                 ret = sa11xx_drv_pcmcia_probe(dev, &shannon_pcmcia_ops, 0, 2);
 123
 124         return ret;
 125 }