LXR linux/drivers/pcmcia/pxa2xx

   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
  19static 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
  24static 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
  37static 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
  42static 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
  50static 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
  60static 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
  73static struct platform_device *palmld_pcmcia_device;
  74
  75static 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
  98static void __exit palmld_pcmcia_exit(void)
  99{
 100        platform_device_unregister(palmld_pcmcia_device);
 101}
 102
 103module_init(palmld_pcmcia_init);
 104module_exit(palmld_pcmcia_exit);
 105
 106MODULE_AUTHOR("Alex Osborne <ato@meshy.org>,"
 107            " Marek Vasut <marek.vasut@gmail.com>");
 108MODULE_DESCRIPTION("PCMCIA support for Palm LifeDrive");
 109MODULE_ALIAS("platform:pxa2xx-pcmcia");
 110MODULE_LICENSE("GPL");
 111