drivers/pcmcia/sa1100_freebird.c

   1 /*
   2  * drivers/pcmcia/sa1100_freebird.c
   3  *
   4  * Created by Eric Peng <ericpeng@coventive.com>
   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/irq.h>
  16 #include "sa1100_generic.h"
  17
  18 static struct pcmcia_irqs irqs[] = {
  19         { 0, IRQ_GPIO_FREEBIRD_CF_CD,  "CF_CD"   },
  20         { 0, IRQ_GPIO_FREEBIRD_CF_BVD, "CF_BVD1" },
  21 };
  22
  23 static int freebird_pcmcia_init(struct soc_pcmcia_socket *skt)
  24 {
  25         /* Enable Linkup CF card */
  26         LINKUP_PRC = 0xc0;
  27         mdelay(100);
  28         LINKUP_PRC = 0xc1;
  29         mdelay(100);
  30         LINKUP_PRC = 0xd1;
  31         mdelay(100);
  32         LINKUP_PRC = 0xd1;
  33         mdelay(100);
  34         LINKUP_PRC = 0xc0;
  35
  36         skt->irq = IRQ_GPIO_FREEBIRD_CF_IRQ;
  37
  38         return soc_pcmcia_request_irqs(skt, irqs, ARRAY_SIZE(irqs));
  39 }
  40
  41 static void freebird_pcmcia_shutdown(struct soc_pcmcia_socket *skt)
  42 {
  43         soc_pcmcia_free_irqs(skt, irqs, ARRAY_SIZE(irqs);
  44
  45         /* Disable CF card */
  46         LINKUP_PRC = 0x40;  /* SSP=1   SOE=0 */
  47         mdelay(100);
  48 }
  49
  50 static void
  51 freebird_pcmcia_socket_state(struct soc_pcmcia_socket *skt, struct pcmcia_state *state)
  52 {
  53         unsigned long levels = LINKUP_PRS;
  54 //      printk("LINKUP_PRS=%x\n",levels);
  55
  56         state->detect = ((levels & (LINKUP_CD1 | LINKUP_CD2))==0)?1:0;
  57         state->ready  = (levels & LINKUP_RDY)?1:0;
  58         state->bvd1   = (levels & LINKUP_BVD1)?1:0;
  59         state->bvd2   = (levels & LINKUP_BVD2)?1:0;
  60         state->wrprot = 0; /* Not available on Assabet. */
  61         state->vs_3v  = 1;  /* Can only apply 3.3V on Assabet. */
  62         state->vs_Xv  = 0;
  63 }
  64
  65 static int
  66 freebird_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
  67                                  socket_state_t *state)
  68 {
  69         unsigned long value, flags;
  70
  71         local_irq_save(flags);
  72
  73         value = 0xc0;   /* SSP=1  SOE=1  CFE=1 */
  74
  75         switch (state->Vcc) {
  76         case 0:
  77                 break;
  78
  79         case 50:
  80                 printk(KERN_WARNING "%s(): CS asked for 5V, applying 3.3V...\n",
  81                         __FUNCTION__);
  82
  83         case 33:  /* Can only apply 3.3V to the CF slot. */
  84                 value |= LINKUP_S1;
  85                 break;
  86
  87         default:
  88                 printk(KERN_ERR "%s(): unrecognized Vcc %u\n",
  89                         __FUNCTION__, state->Vcc);
  90                 local_irq_restore(flags);
  91                 return -1;
  92         }
  93
  94         if (state->flags & SS_RESET)
  95                 value |= LINKUP_RESET;
  96
  97         /* Silently ignore Vpp, output enable, speaker enable. */
  98
  99         LINKUP_PRC = value;
 100 //      printk("LINKUP_PRC=%x\n",value);
 101         local_irq_restore(flags);
 102
 103         return 0;
 104 }
 105
 106 static void freebird_pcmcia_socket_init(struct soc_pcmcia_socket *skt)
 107 {
 108         soc_pcmcia_disable_irqs(skt, irqs, ARRAY_SIZE(irqs));
 109 }
 110
 111 static void freebird_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt)
 112 {
 113         soc_pcmcia_enable_irqs(skt, irqs, ARRAY_SIZE(irqs));
 114 }
 115
 116 static struct pcmcia_low_level freebird_pcmcia_ops = {
 117         .owner                  = THIS_MODULE,
 118         .hw_init                = freebird_pcmcia_hw_init,
 119         .hw_shutdown            = freebird_pcmcia_hw_shutdown,
 120         .socket_state           = freebird_pcmcia_socket_state,
 121         .configure_socket       = freebird_pcmcia_configure_socket,
 122
 123         .socket_init            = freebird_pcmcia_socket_init,
 124         .socket_suspend         = freebird_pcmcia_socket_suspend,
 125 };
 126
 127 int __init pcmcia_freebird_init(struct device *dev)
 128 {
 129         int ret = -ENODEV;
 130
 131         if (machine_is_freebird())
 132                 ret = sa11xx_drv_pcmcia_probe(dev, &freebird_pcmcia_ops, 0, 1);
 133
 134         return ret;
 135 }