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 int
  35 assabet_pcmcia_configure_socket(struct soc_pcmcia_socket *skt, const socket_state_t *state)
  36 {
  37         unsigned int mask;
  38
  39         switch (state->Vcc) {
  40         case 0:
  41                 mask = 0;
  42                 break;
  43
  44         case 50:
  45                 printk(KERN_WARNING "%s(): CS asked for 5V, applying 3.3V...\n",
  46                         __func__);
  47
  48         case 33:  /* Can only apply 3.3V to the CF slot. */
  49                 mask = ASSABET_BCR_CF_PWR;
  50                 break;
  51
  52         default:
  53                 printk(KERN_ERR "%s(): unrecognized Vcc %u\n", __func__,
  54                         state->Vcc);
  55                 return -1;
  56         }
  57
  58         /* Silently ignore Vpp, speaker enable. */
  59
  60         if (state->flags & SS_RESET)
  61                 mask |= ASSABET_BCR_CF_RST;
  62         if (!(state->flags & SS_OUTPUT_ENA))
  63                 mask |= ASSABET_BCR_CF_BUS_OFF;
  64
  65         ASSABET_BCR_frob(ASSABET_BCR_CF_RST | ASSABET_BCR_CF_PWR |
  66                         ASSABET_BCR_CF_BUS_OFF, mask);
  67
  68         return 0;
  69 }
  70
  71 /*
  72  * Disable card status IRQs on suspend.
  73  */
  74 static void assabet_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt)
  75 {
  76         /*
  77          * Tristate the CF bus signals.  Also assert CF
  78          * reset as per user guide page 4-11.
  79          */
  80         ASSABET_BCR_set(ASSABET_BCR_CF_BUS_OFF | ASSABET_BCR_CF_RST);
  81 }
  82
  83 static struct pcmcia_low_level assabet_pcmcia_ops = {
  84         .owner                  = THIS_MODULE,
  85         .hw_init                = assabet_pcmcia_hw_init,
  86         .socket_state           = soc_common_cf_socket_state,
  87         .configure_socket       = assabet_pcmcia_configure_socket,
  88         .socket_suspend         = assabet_pcmcia_socket_suspend,
  89 };
  90
  91 int pcmcia_assabet_init(struct device *dev)
  92 {
  93         int ret = -ENODEV;
  94
  95         if (machine_is_assabet() && !machine_has_neponset())
  96                 ret = sa11xx_drv_pcmcia_probe(dev, &assabet_pcmcia_ops, 1, 1);
  97
  98         return ret;
  99 }