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");