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