drivers/pcmcia/pxa2xx_vpac270.c

   1 /*
   2  * linux/drivers/pcmcia/pxa2xx_vpac270.c
   3  *
   4  * Driver for Voipac PXA270 PCMCIA and CF sockets
   5  *
   6  * Copyright (C) 2010-2011 Marek Vasut <marek.vasut@gmail.com>
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License version 2 as
  10  * published by the Free Software Foundation.
  11  *
  12  */
  13
  14 #include <linux/gpio.h>
  15 #include <linux/module.h>
  16 #include <linux/platform_device.h>
  17
  18 #include <asm/mach-types.h>
  19
  20 #include <mach/vpac270.h>
  21
  22 #include "soc_common.h"
  23
  24 static struct gpio vpac270_pcmcia_gpios[] = {
  25         { GPIO107_VPAC270_PCMCIA_PPEN,  GPIOF_INIT_LOW, "PCMCIA PPEN" },
  26         { GPIO11_VPAC270_PCMCIA_RESET,  GPIOF_INIT_LOW, "PCMCIA Reset" },
  27 };
  28
  29 static struct gpio vpac270_cf_gpios[] = {
  30         { GPIO16_VPAC270_CF_RESET,      GPIOF_INIT_LOW, "CF Reset" },
  31 };
  32
  33 static int vpac270_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
  34 {
  35         int ret;
  36
  37         if (skt->nr == 0) {
  38                 ret = gpio_request_array(vpac270_pcmcia_gpios,
  39                                 ARRAY_SIZE(vpac270_pcmcia_gpios));
  40
  41                 skt->stat[SOC_STAT_CD].gpio = GPIO84_VPAC270_PCMCIA_CD;
  42                 skt->stat[SOC_STAT_CD].name = "PCMCIA CD";
  43                 skt->stat[SOC_STAT_RDY].gpio = GPIO35_VPAC270_PCMCIA_RDY;
  44                 skt->stat[SOC_STAT_RDY].name = "PCMCIA Ready";
  45         } else {
  46                 ret = gpio_request_array(vpac270_cf_gpios,
  47                                 ARRAY_SIZE(vpac270_cf_gpios));
  48
  49                 skt->stat[SOC_STAT_CD].gpio = GPIO17_VPAC270_CF_CD;
  50                 skt->stat[SOC_STAT_CD].name = "CF CD";
  51                 skt->stat[SOC_STAT_RDY].gpio = GPIO12_VPAC270_CF_RDY;
  52                 skt->stat[SOC_STAT_RDY].name = "CF Ready";
  53         }
  54
  55         return ret;
  56 }
  57
  58 static void vpac270_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt)
  59 {
  60         if (skt->nr == 0)
  61                 gpio_free_array(vpac270_pcmcia_gpios,
  62                                         ARRAY_SIZE(vpac270_pcmcia_gpios));
  63         else
  64                 gpio_free_array(vpac270_cf_gpios,
  65                                         ARRAY_SIZE(vpac270_cf_gpios));
  66 }
  67
  68 static void vpac270_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
  69                                         struct pcmcia_state *state)
  70 {
  71         state->vs_3v  = 1;
  72         state->vs_Xv  = 0;
  73 }
  74
  75 static int
  76 vpac270_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
  77                                 const socket_state_t *state)
  78 {
  79         if (skt->nr == 0) {
  80                 gpio_set_value(GPIO11_VPAC270_PCMCIA_RESET,
  81                         (state->flags & SS_RESET));
  82                 gpio_set_value(GPIO107_VPAC270_PCMCIA_PPEN,
  83                         !(state->Vcc == 33 || state->Vcc == 50));
  84         } else {
  85                 gpio_set_value(GPIO16_VPAC270_CF_RESET,
  86                         (state->flags & SS_RESET));
  87         }
  88
  89         return 0;
  90 }
  91
  92 static struct pcmcia_low_level vpac270_pcmcia_ops = {
  93         .owner                  = THIS_MODULE,
  94
  95         .first                  = 0,
  96         .nr                     = 2,
  97
  98         .hw_init                = vpac270_pcmcia_hw_init,
  99         .hw_shutdown            = vpac270_pcmcia_hw_shutdown,
 100
 101         .socket_state           = vpac270_pcmcia_socket_state,
 102         .configure_socket       = vpac270_pcmcia_configure_socket,
 103 };
 104
 105 static struct platform_device *vpac270_pcmcia_device;
 106
 107 static int __init vpac270_pcmcia_init(void)
 108 {
 109         int ret;
 110
 111         if (!machine_is_vpac270())
 112                 return -ENODEV;
 113
 114         vpac270_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1);
 115         if (!vpac270_pcmcia_device)
 116                 return -ENOMEM;
 117
 118         ret = platform_device_add_data(vpac270_pcmcia_device,
 119                 &vpac270_pcmcia_ops, sizeof(vpac270_pcmcia_ops));
 120
 121         if (!ret)
 122                 ret = platform_device_add(vpac270_pcmcia_device);
 123
 124         if (ret)
 125                 platform_device_put(vpac270_pcmcia_device);
 126
 127         return ret;
 128 }
 129
 130 static void __exit vpac270_pcmcia_exit(void)
 131 {
 132         platform_device_unregister(vpac270_pcmcia_device);
 133 }
 134
 135 module_init(vpac270_pcmcia_init);
 136 module_exit(vpac270_pcmcia_exit);
 137
 138 MODULE_AUTHOR("Marek Vasut <marek.vasut@gmail.com>");
 139 MODULE_DESCRIPTION("PCMCIA support for Voipac PXA270");
 140 MODULE_ALIAS("platform:pxa2xx-pcmcia");
 141 MODULE_LICENSE("GPL");