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