drivers/pcmcia/pxa2xx_palmtx.c

   1 /*
   2  * linux/drivers/pcmcia/pxa2xx_palmtx.c
   3  *
   4  * Driver for Palm T|X PCMCIA
   5  *
   6  * Copyright (C) 2007-2011 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/module.h>
  15 #include <linux/platform_device.h>
  16 #include <linux/gpio.h>
  17
  18 #include <asm/mach-types.h>
  19 #include <mach/palmtx.h>
  20 #include "soc_common.h"
  21
  22 static struct gpio palmtx_pcmcia_gpios[] = {
  23         { GPIO_NR_PALMTX_PCMCIA_POWER1, GPIOF_INIT_LOW, "PCMCIA Power 1" },
  24         { GPIO_NR_PALMTX_PCMCIA_POWER2, GPIOF_INIT_LOW, "PCMCIA Power 2" },
  25         { GPIO_NR_PALMTX_PCMCIA_RESET,  GPIOF_INIT_HIGH,"PCMCIA Reset" },
  26         { GPIO_NR_PALMTX_PCMCIA_READY,  GPIOF_IN,       "PCMCIA Ready" },
  27 };
  28
  29 static int palmtx_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
  30 {
  31         int ret;
  32
  33         ret = gpio_request_array(palmtx_pcmcia_gpios,
  34                                 ARRAY_SIZE(palmtx_pcmcia_gpios));
  35
  36         skt->socket.pci_irq = gpio_to_irq(GPIO_NR_PALMTX_PCMCIA_READY);
  37
  38         return ret;
  39 }
  40
  41 static void palmtx_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt)
  42 {
  43         gpio_free_array(palmtx_pcmcia_gpios, ARRAY_SIZE(palmtx_pcmcia_gpios));
  44 }
  45
  46 static void palmtx_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
  47                                         struct pcmcia_state *state)
  48 {
  49         state->detect = 1; /* always inserted */
  50         state->ready  = !!gpio_get_value(GPIO_NR_PALMTX_PCMCIA_READY);
  51         state->bvd1   = 1;
  52         state->bvd2   = 1;
  53         state->wrprot = 0;
  54         state->vs_3v  = 1;
  55         state->vs_Xv  = 0;
  56 }
  57
  58 static int
  59 palmtx_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
  60                                 const socket_state_t *state)
  61 {
  62         gpio_set_value(GPIO_NR_PALMTX_PCMCIA_POWER1, 1);
  63         gpio_set_value(GPIO_NR_PALMTX_PCMCIA_POWER2, 1);
  64         gpio_set_value(GPIO_NR_PALMTX_PCMCIA_RESET,
  65                         !!(state->flags & SS_RESET));
  66
  67         return 0;
  68 }
  69
  70 static struct pcmcia_low_level palmtx_pcmcia_ops = {
  71         .owner                  = THIS_MODULE,
  72
  73         .first                  = 0,
  74         .nr                     = 1,
  75
  76         .hw_init                = palmtx_pcmcia_hw_init,
  77         .hw_shutdown            = palmtx_pcmcia_hw_shutdown,
  78
  79         .socket_state           = palmtx_pcmcia_socket_state,
  80         .configure_socket       = palmtx_pcmcia_configure_socket,
  81 };
  82
  83 static struct platform_device *palmtx_pcmcia_device;
  84
  85 static int __init palmtx_pcmcia_init(void)
  86 {
  87         int ret;
  88
  89         if (!machine_is_palmtx())
  90                 return -ENODEV;
  91
  92         palmtx_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1);
  93         if (!palmtx_pcmcia_device)
  94                 return -ENOMEM;
  95
  96         ret = platform_device_add_data(palmtx_pcmcia_device, &palmtx_pcmcia_ops,
  97                                         sizeof(palmtx_pcmcia_ops));
  98
  99         if (!ret)
 100                 ret = platform_device_add(palmtx_pcmcia_device);
 101
 102         if (ret)
 103                 platform_device_put(palmtx_pcmcia_device);
 104
 105         return ret;
 106 }
 107
 108 static void __exit palmtx_pcmcia_exit(void)
 109 {
 110         platform_device_unregister(palmtx_pcmcia_device);
 111 }
 112
 113 module_init(palmtx_pcmcia_init);
 114 module_exit(palmtx_pcmcia_exit);
 115
 116 MODULE_AUTHOR("Marek Vasut <marek.vasut@gmail.com>");
 117 MODULE_DESCRIPTION("PCMCIA support for Palm T|X");
 118 MODULE_ALIAS("platform:pxa2xx-pcmcia");
 119 MODULE_LICENSE("GPL");