drivers/pcmcia/pxa2xx_palmld.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * linux/drivers/pcmcia/pxa2xx_palmld.c
   4  *
   5  * Driver for Palm LifeDrive PCMCIA
   6  *
   7  * Copyright (C) 2006 Alex Osborne <ato@meshy.org>
   8  * Copyright (C) 2007-2011 Marek Vasut <marek.vasut@gmail.com>
   9  */
  10
  11 #include <linux/module.h>
  12 #include <linux/platform_device.h>
  13 #include <linux/gpio.h>
  14
  15 #include <asm/mach-types.h>
  16 #include <mach/palmld.h>
  17 #include "soc_common.h"
  18
  19 static struct gpio palmld_pcmcia_gpios[] = {
  20         { GPIO_NR_PALMLD_PCMCIA_POWER,  GPIOF_INIT_LOW, "PCMCIA Power" },
  21         { GPIO_NR_PALMLD_PCMCIA_RESET,  GPIOF_INIT_HIGH,"PCMCIA Reset" },
  22 };
  23
  24 static int palmld_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
  25 {
  26         int ret;
  27
  28         ret = gpio_request_array(palmld_pcmcia_gpios,
  29                                 ARRAY_SIZE(palmld_pcmcia_gpios));
  30
  31         skt->stat[SOC_STAT_RDY].gpio = GPIO_NR_PALMLD_PCMCIA_READY;
  32         skt->stat[SOC_STAT_RDY].name = "PCMCIA Ready";
  33
  34         return ret;
  35 }
  36
  37 static void palmld_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt)
  38 {
  39         gpio_free_array(palmld_pcmcia_gpios, ARRAY_SIZE(palmld_pcmcia_gpios));
  40 }
  41
  42 static void palmld_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
  43                                         struct pcmcia_state *state)
  44 {
  45         state->detect = 1; /* always inserted */
  46         state->vs_3v  = 1;
  47         state->vs_Xv  = 0;
  48 }
  49
  50 static int palmld_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
  51                                         const socket_state_t *state)
  52 {
  53         gpio_set_value(GPIO_NR_PALMLD_PCMCIA_POWER, 1);
  54         gpio_set_value(GPIO_NR_PALMLD_PCMCIA_RESET,
  55                         !!(state->flags & SS_RESET));
  56
  57         return 0;
  58 }
  59
  60 static struct pcmcia_low_level palmld_pcmcia_ops = {
  61         .owner                  = THIS_MODULE,
  62
  63         .first                  = 1,
  64         .nr                     = 1,
  65
  66         .hw_init                = palmld_pcmcia_hw_init,
  67         .hw_shutdown            = palmld_pcmcia_hw_shutdown,
  68
  69         .socket_state           = palmld_pcmcia_socket_state,
  70         .configure_socket       = palmld_pcmcia_configure_socket,
  71 };
  72
  73 static struct platform_device *palmld_pcmcia_device;
  74
  75 static int __init palmld_pcmcia_init(void)
  76 {
  77         int ret;
  78
  79         if (!machine_is_palmld())
  80                 return -ENODEV;
  81
  82         palmld_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1);
  83         if (!palmld_pcmcia_device)
  84                 return -ENOMEM;
  85
  86         ret = platform_device_add_data(palmld_pcmcia_device, &palmld_pcmcia_ops,
  87                                         sizeof(palmld_pcmcia_ops));
  88
  89         if (!ret)
  90                 ret = platform_device_add(palmld_pcmcia_device);
  91
  92         if (ret)
  93                 platform_device_put(palmld_pcmcia_device);
  94
  95         return ret;
  96 }
  97
  98 static void __exit palmld_pcmcia_exit(void)
  99 {
 100         platform_device_unregister(palmld_pcmcia_device);
 101 }
 102
 103 module_init(palmld_pcmcia_init);
 104 module_exit(palmld_pcmcia_exit);
 105
 106 MODULE_AUTHOR("Alex Osborne <ato@meshy.org>,"
 107             " Marek Vasut <marek.vasut@gmail.com>");
 108 MODULE_DESCRIPTION("PCMCIA support for Palm LifeDrive");
 109 MODULE_ALIAS("platform:pxa2xx-pcmcia");
 110 MODULE_LICENSE("GPL");