drivers/pcmcia/sa1100_assabet.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * drivers/pcmcia/sa1100_assabet.c
   4  *
   5  * PCMCIA implementation routines for Assabet
   6  *
   7  */
   8 #include <linux/module.h>
   9 #include <linux/kernel.h>
  10 #include <linux/errno.h>
  11 #include <linux/interrupt.h>
  12 #include <linux/device.h>
  13 #include <linux/init.h>
  14 #include <linux/gpio.h>
  15
  16 #include <asm/mach-types.h>
  17 #include <mach/assabet.h>
  18
  19 #include "sa1100_generic.h"
  20
  21 static int assabet_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
  22 {
  23         skt->stat[SOC_STAT_CD].gpio = ASSABET_GPIO_CF_CD;
  24         skt->stat[SOC_STAT_CD].name = "CF CD";
  25         skt->stat[SOC_STAT_BVD1].gpio = ASSABET_GPIO_CF_BVD1;
  26         skt->stat[SOC_STAT_BVD1].name = "CF BVD1";
  27         skt->stat[SOC_STAT_BVD2].gpio = ASSABET_GPIO_CF_BVD2;
  28         skt->stat[SOC_STAT_BVD2].name = "CF BVD2";
  29         skt->stat[SOC_STAT_RDY].gpio = ASSABET_GPIO_CF_IRQ;
  30         skt->stat[SOC_STAT_RDY].name = "CF RDY";
  31
  32         return 0;
  33 }
  34
  35 static int
  36 assabet_pcmcia_configure_socket(struct soc_pcmcia_socket *skt, const socket_state_t *state)
  37 {
  38         unsigned int mask;
  39
  40         switch (state->Vcc) {
  41         case 0:
  42                 mask = 0;
  43                 break;
  44
  45         case 50:
  46                 printk(KERN_WARNING "%s(): CS asked for 5V, applying 3.3V...\n",
  47                         __func__);
  48
  49         case 33:  /* Can only apply 3.3V to the CF slot. */
  50                 mask = ASSABET_BCR_CF_PWR;
  51                 break;
  52
  53         default:
  54                 printk(KERN_ERR "%s(): unrecognized Vcc %u\n", __func__,
  55                         state->Vcc);
  56                 return -1;
  57         }
  58
  59         /* Silently ignore Vpp, speaker enable. */
  60
  61         if (state->flags & SS_RESET)
  62                 mask |= ASSABET_BCR_CF_RST;
  63         if (!(state->flags & SS_OUTPUT_ENA))
  64                 mask |= ASSABET_BCR_CF_BUS_OFF;
  65
  66         ASSABET_BCR_frob(ASSABET_BCR_CF_RST | ASSABET_BCR_CF_PWR |
  67                         ASSABET_BCR_CF_BUS_OFF, mask);
  68
  69         return 0;
  70 }
  71
  72 /*
  73  * Disable card status IRQs on suspend.
  74  */
  75 static void assabet_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt)
  76 {
  77         /*
  78          * Tristate the CF bus signals.  Also assert CF
  79          * reset as per user guide page 4-11.
  80          */
  81         ASSABET_BCR_set(ASSABET_BCR_CF_BUS_OFF | ASSABET_BCR_CF_RST);
  82 }
  83
  84 static struct pcmcia_low_level assabet_pcmcia_ops = {
  85         .owner                  = THIS_MODULE,
  86         .hw_init                = assabet_pcmcia_hw_init,
  87         .socket_state           = soc_common_cf_socket_state,
  88         .configure_socket       = assabet_pcmcia_configure_socket,
  89         .socket_suspend         = assabet_pcmcia_socket_suspend,
  90 };
  91
  92 int pcmcia_assabet_init(struct device *dev)
  93 {
  94         int ret = -ENODEV;
  95
  96         if (machine_is_assabet() && !machine_has_neponset())
  97                 ret = sa11xx_drv_pcmcia_probe(dev, &assabet_pcmcia_ops, 1, 1);
  98
  99         return ret;
 100 }