drivers/pcmcia/sa1100_cerf.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * drivers/pcmcia/sa1100_cerf.c
   4  *
   5  * PCMCIA implementation routines for CerfBoard
   6  * Based off the Assabet.
   7  *
   8  */
   9 #include <linux/module.h>
  10 #include <linux/kernel.h>
  11 #include <linux/device.h>
  12 #include <linux/init.h>
  13 #include <linux/delay.h>
  14 #include <linux/gpio.h>
  15
  16 #include <mach/hardware.h>
  17 #include <asm/mach-types.h>
  18 #include <asm/irq.h>
  19 #include <mach/cerf.h>
  20 #include "sa1100_generic.h"
  21
  22 #define CERF_SOCKET     1
  23
  24 static int cerf_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
  25 {
  26         int ret;
  27
  28         ret = gpio_request_one(CERF_GPIO_CF_RESET, GPIOF_OUT_INIT_LOW, "CF_RESET");
  29         if (ret)
  30                 return ret;
  31
  32         skt->stat[SOC_STAT_CD].gpio = CERF_GPIO_CF_CD;
  33         skt->stat[SOC_STAT_CD].name = "CF_CD";
  34         skt->stat[SOC_STAT_BVD1].gpio = CERF_GPIO_CF_BVD1;
  35         skt->stat[SOC_STAT_BVD1].name = "CF_BVD1";
  36         skt->stat[SOC_STAT_BVD2].gpio = CERF_GPIO_CF_BVD2;
  37         skt->stat[SOC_STAT_BVD2].name = "CF_BVD2";
  38         skt->stat[SOC_STAT_RDY].gpio = CERF_GPIO_CF_IRQ;
  39         skt->stat[SOC_STAT_RDY].name = "CF_IRQ";
  40
  41         return 0;
  42 }
  43
  44 static void cerf_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt)
  45 {
  46         gpio_free(CERF_GPIO_CF_RESET);
  47 }
  48
  49 static int
  50 cerf_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
  51                              const socket_state_t *state)
  52 {
  53         switch (state->Vcc) {
  54         case 0:
  55         case 50:
  56         case 33:
  57                 break;
  58
  59         default:
  60                 printk(KERN_ERR "%s(): unrecognized Vcc %u\n",
  61                         __func__, state->Vcc);
  62                 return -1;
  63         }
  64
  65         gpio_set_value(CERF_GPIO_CF_RESET, !!(state->flags & SS_RESET));
  66
  67         return 0;
  68 }
  69
  70 static struct pcmcia_low_level cerf_pcmcia_ops = {
  71         .owner                  = THIS_MODULE,
  72         .hw_init                = cerf_pcmcia_hw_init,
  73         .hw_shutdown            = cerf_pcmcia_hw_shutdown,
  74         .socket_state           = soc_common_cf_socket_state,
  75         .configure_socket       = cerf_pcmcia_configure_socket,
  76 };
  77
  78 int pcmcia_cerf_init(struct device *dev)
  79 {
  80         int ret = -ENODEV;
  81
  82         if (machine_is_cerf())
  83                 ret = sa11xx_drv_pcmcia_probe(dev, &cerf_pcmcia_ops, CERF_SOCKET, 1);
  84
  85         return ret;
  86 }