drivers/pcmcia/sa1100_yopy.c

   1 /*
   2  * drivers/pcmcia/sa1100_yopy.c
   3  *
   4  * PCMCIA implementation routines for Yopy
   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
  19 static inline void pcmcia_power(int on) {
  20         /* high for power up */
  21         yopy_gpio_set(GPIO_CF_POWER, on);
  22 }
  23
  24 static inline void pcmcia_reset(int reset)
  25 {
  26         /* high for reset */
  27         yopy_gpio_set(GPIO_CF_RESET, reset);
  28 }
  29
  30 static struct pcmcia_irqs irqs[] = {
  31         { 0, IRQ_CF_CD,   "CF_CD"   },
  32         { 0, IRQ_CF_BVD2, "CF_BVD2" },
  33         { 0, IRQ_CF_BVD1, "CF_BVD1" },
  34 };
  35
  36 static int yopy_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
  37 {
  38         skt->irq = IRQ_CF_IREQ;
  39
  40         pcmcia_power(0);
  41         pcmcia_reset(1);
  42
  43         return soc_pcmcia_request_irqs(skt, irqs, ARRAY_SIZE(irqs));
  44 }
  45
  46 static void yopy_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt)
  47 {
  48         soc_pcmcia_free_irqs(skt, irqs, ARRAY_SIZE(irqs));
  49
  50         /* Disable CF */
  51         pcmcia_reset(1);
  52         pcmcia_power(0);
  53 }
  54
  55 static void
  56 yopy_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
  57                          struct pcmcia_state_array *state)
  58 {
  59         unsigned long levels = GPLR;
  60
  61         state->detect = (levels & GPIO_CF_CD)    ? 0 : 1;
  62         state->ready  = (levels & GPIO_CF_READY) ? 1 : 0;
  63         state->bvd1   = (levels & GPIO_CF_BVD1)  ? 1 : 0;
  64         state->bvd2   = (levels & GPIO_CF_BVD2)  ? 1 : 0;
  65         state->wrprot = 0; /* Not available on Yopy. */
  66         state->vs_3v  = 0; /* FIXME Can only apply 3.3V on Yopy. */
  67         state->vs_Xv  = 0;
  68 }
  69
  70 static int
  71 yopy_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                 pcmcia_power(0);
  77                 break;
  78         case 50:
  79                 printk(KERN_WARNING "%s(): CS asked for 5V, applying 3.3V..\n", __FUNCTION__);
  80         case 33:
  81                 pcmcia_power(1);
  82                 break;
  83         default:
  84                 printk(KERN_ERR "%s(): unrecognized Vcc %u\n",
  85                        __FUNCTION__, state->Vcc);
  86                 return -1;
  87         }
  88
  89         pcmcia_reset(state->flags & SS_RESET ? 1 : 0);
  90
  91         /* Silently ignore Vpp, output enable, speaker enable. */
  92
  93         return 0;
  94 }
  95
  96 static void yopy_pcmcia_socket_init(struct soc_pcmcia_socket *skt)
  97 {
  98         soc_pcmcia_enable_irqs(skt, irqs, ARRAY_SIZE(irqs));
  99 }
 100
 101 static void yopy_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 yopy_pcmcia_ops = {
 107         .owner                  = THIS_MODULE,
 108         .init                   = yopy_pcmcia_init,
 109         .shutdown               = yopy_pcmcia_shutdown,
 110         .socket_state           = yopy_pcmcia_socket_state,
 111         .configure_socket       = yopy_pcmcia_configure_socket,
 112
 113         .socket_init            = yopy_pcmcia_socket_init,
 114         .socket_suspend         = yopy_pcmcia_socket_suspend,
 115 };
 116
 117 int __init pcmcia_yopy_init(struct device *dev)
 118 {
 119         int ret = -ENODEV;
 120
 121         if (machine_is_yopy())
 122                 ret = sa11xx_drv_pcmcia_probe(dev, &yopy_pcmcia_ops, 0, 1);
 123
 124         return ret;
 125 }