linux/drivers/pcmcia/pxa2xx_palmtx.c
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   1// SPDX-License-Identifier: GPL-2.0-only
   2/*
   3 * linux/drivers/pcmcia/pxa2xx_palmtx.c
   4 *
   5 * Driver for Palm T|X PCMCIA
   6 *
   7 * Copyright (C) 2007-2011 Marek Vasut <marek.vasut@gmail.com>
   8 */
   9
  10#include <linux/module.h>
  11#include <linux/platform_device.h>
  12#include <linux/gpio.h>
  13
  14#include <asm/mach-types.h>
  15#include <mach/palmtx.h>
  16#include "soc_common.h"
  17
  18static struct gpio palmtx_pcmcia_gpios[] = {
  19        { GPIO_NR_PALMTX_PCMCIA_POWER1, GPIOF_INIT_LOW, "PCMCIA Power 1" },
  20        { GPIO_NR_PALMTX_PCMCIA_POWER2, GPIOF_INIT_LOW, "PCMCIA Power 2" },
  21        { GPIO_NR_PALMTX_PCMCIA_RESET,  GPIOF_INIT_HIGH,"PCMCIA Reset" },
  22};
  23
  24static int palmtx_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
  25{
  26        int ret;
  27
  28        ret = gpio_request_array(palmtx_pcmcia_gpios,
  29                                ARRAY_SIZE(palmtx_pcmcia_gpios));
  30
  31        skt->stat[SOC_STAT_RDY].gpio = GPIO_NR_PALMTX_PCMCIA_READY;
  32        skt->stat[SOC_STAT_RDY].name = "PCMCIA Ready";
  33
  34        return ret;
  35}
  36
  37static void palmtx_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt)
  38{
  39        gpio_free_array(palmtx_pcmcia_gpios, ARRAY_SIZE(palmtx_pcmcia_gpios));
  40}
  41
  42static void palmtx_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
  51palmtx_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
  52                                const socket_state_t *state)
  53{
  54        gpio_set_value(GPIO_NR_PALMTX_PCMCIA_POWER1, 1);
  55        gpio_set_value(GPIO_NR_PALMTX_PCMCIA_POWER2, 1);
  56        gpio_set_value(GPIO_NR_PALMTX_PCMCIA_RESET,
  57                        !!(state->flags & SS_RESET));
  58
  59        return 0;
  60}
  61
  62static struct pcmcia_low_level palmtx_pcmcia_ops = {
  63        .owner                  = THIS_MODULE,
  64
  65        .first                  = 0,
  66        .nr                     = 1,
  67
  68        .hw_init                = palmtx_pcmcia_hw_init,
  69        .hw_shutdown            = palmtx_pcmcia_hw_shutdown,
  70
  71        .socket_state           = palmtx_pcmcia_socket_state,
  72        .configure_socket       = palmtx_pcmcia_configure_socket,
  73};
  74
  75static struct platform_device *palmtx_pcmcia_device;
  76
  77static int __init palmtx_pcmcia_init(void)
  78{
  79        int ret;
  80
  81        if (!machine_is_palmtx())
  82                return -ENODEV;
  83
  84        palmtx_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1);
  85        if (!palmtx_pcmcia_device)
  86                return -ENOMEM;
  87
  88        ret = platform_device_add_data(palmtx_pcmcia_device, &palmtx_pcmcia_ops,
  89                                        sizeof(palmtx_pcmcia_ops));
  90
  91        if (!ret)
  92                ret = platform_device_add(palmtx_pcmcia_device);
  93
  94        if (ret)
  95                platform_device_put(palmtx_pcmcia_device);
  96
  97        return ret;
  98}
  99
 100static void __exit palmtx_pcmcia_exit(void)
 101{
 102        platform_device_unregister(palmtx_pcmcia_device);
 103}
 104
 105module_init(palmtx_pcmcia_init);
 106module_exit(palmtx_pcmcia_exit);
 107
 108MODULE_AUTHOR("Marek Vasut <marek.vasut@gmail.com>");
 109MODULE_DESCRIPTION("PCMCIA support for Palm T|X");
 110MODULE_ALIAS("platform:pxa2xx-pcmcia");
 111MODULE_LICENSE("GPL");
 112