drivers/pcmcia/sa1100_assabet.c

   1 /*
   2  * drivers/pcmcia/sa1100_assabet.c
   3  *
   4  * PCMCIA implementation routines for Assabet
   5  *
   6  */
   7 #include <linux/module.h>
   8 #include <linux/kernel.h>
   9 #include <linux/errno.h>
  10 #include <linux/interrupt.h>
  11 #include <linux/device.h>
  12 #include <linux/init.h>
  13 #include <linux/gpio.h>
  14
  15 #include <asm/mach-types.h>
  16 #include <mach/assabet.h>
  17
  18 #include "sa1100_generic.h"
  19
  20 static int assabet_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
  21 {
  22         skt->stat[SOC_STAT_CD].gpio = ASSABET_GPIO_CF_CD;
  23         skt->stat[SOC_STAT_CD].name = "CF CD";
  24         skt->stat[SOC_STAT_BVD1].gpio = ASSABET_GPIO_CF_BVD1;
  25         skt->stat[SOC_STAT_BVD1].name = "CF BVD1";
  26         skt->stat[SOC_STAT_BVD2].gpio = ASSABET_GPIO_CF_BVD2;
  27         skt->stat[SOC_STAT_BVD2].name = "CF BVD2";
  28         skt->stat[SOC_STAT_RDY].gpio = ASSABET_GPIO_CF_IRQ;
  29         skt->stat[SOC_STAT_RDY].name = "CF RDY";
  30
  31         return 0;
  32 }
  33
  34 static void
  35 assabet_pcmcia_socket_state(struct soc_pcmcia_socket *skt, struct pcmcia_state *state)
  36 {
  37         state->vs_3v  = 1; /* Can only apply 3.3V on Assabet. */
  38         state->vs_Xv  = 0;
  39 }
  40
  41 static int
  42 assabet_pcmcia_configure_socket(struct soc_pcmcia_socket *skt, const socket_state_t *state)
  43 {
  44         unsigned int mask;
  45
  46         switch (state->Vcc) {
  47         case 0:
  48                 mask = 0;
  49                 break;
  50
  51         case 50:
  52                 printk(KERN_WARNING "%s(): CS asked for 5V, applying 3.3V...\n",
  53                         __func__);
  54
  55         case 33:  /* Can only apply 3.3V to the CF slot. */
  56                 mask = ASSABET_BCR_CF_PWR;
  57                 break;
  58
  59         default:
  60                 printk(KERN_ERR "%s(): unrecognized Vcc %u\n", __func__,
  61                         state->Vcc);
  62                 return -1;
  63         }
  64
  65         /* Silently ignore Vpp, speaker enable. */
  66
  67         if (state->flags & SS_RESET)
  68                 mask |= ASSABET_BCR_CF_RST;
  69         if (!(state->flags & SS_OUTPUT_ENA))
  70                 mask |= ASSABET_BCR_CF_BUS_OFF;
  71
  72         ASSABET_BCR_frob(ASSABET_BCR_CF_RST | ASSABET_BCR_CF_PWR |
  73                         ASSABET_BCR_CF_BUS_OFF, mask);
  74
  75         return 0;
  76 }
  77
  78 /*
  79  * Disable card status IRQs on suspend.
  80  */
  81 static void assabet_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt)
  82 {
  83         /*
  84          * Tristate the CF bus signals.  Also assert CF
  85          * reset as per user guide page 4-11.
  86          */
  87         ASSABET_BCR_set(ASSABET_BCR_CF_BUS_OFF | ASSABET_BCR_CF_RST);
  88 }
  89
  90 static struct pcmcia_low_level assabet_pcmcia_ops = {
  91         .owner                  = THIS_MODULE,
  92         .hw_init                = assabet_pcmcia_hw_init,
  93         .socket_state           = assabet_pcmcia_socket_state,
  94         .configure_socket       = assabet_pcmcia_configure_socket,
  95         .socket_suspend         = assabet_pcmcia_socket_suspend,
  96 };
  97
  98 int pcmcia_assabet_init(struct device *dev)
  99 {
 100         int ret = -ENODEV;
 101
 102         if (machine_is_assabet() && !machine_has_neponset())
 103                 ret = sa11xx_drv_pcmcia_probe(dev, &assabet_pcmcia_ops, 1, 1);
 104
 105         return ret;
 106 }