Root/drivers/pcmcia/pxa2xx_palmld.c

1/*
2 * linux/drivers/pcmcia/pxa2xx_palmld.c
3 *
4 * Driver for Palm LifeDrive PCMCIA
5 *
6 * Copyright (C) 2006 Alex Osborne <ato@meshy.org>
7 * Copyright (C) 2007-2008 Marek Vasut <marek.vasut@gmail.com>
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
12 *
13 */
14
15#include <linux/module.h>
16#include <linux/platform_device.h>
17#include <linux/gpio.h>
18
19#include <asm/mach-types.h>
20#include <mach/palmld.h>
21#include "soc_common.h"
22
23static int palmld_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
24{
25    int ret;
26
27    ret = gpio_request(GPIO_NR_PALMLD_PCMCIA_POWER, "PCMCIA PWR");
28    if (ret)
29        goto err1;
30    ret = gpio_direction_output(GPIO_NR_PALMLD_PCMCIA_POWER, 0);
31    if (ret)
32        goto err2;
33
34    ret = gpio_request(GPIO_NR_PALMLD_PCMCIA_RESET, "PCMCIA RST");
35    if (ret)
36        goto err2;
37    ret = gpio_direction_output(GPIO_NR_PALMLD_PCMCIA_RESET, 1);
38    if (ret)
39        goto err3;
40
41    ret = gpio_request(GPIO_NR_PALMLD_PCMCIA_READY, "PCMCIA RDY");
42    if (ret)
43        goto err3;
44    ret = gpio_direction_input(GPIO_NR_PALMLD_PCMCIA_READY);
45    if (ret)
46        goto err4;
47
48    skt->socket.pci_irq = IRQ_GPIO(GPIO_NR_PALMLD_PCMCIA_READY);
49    return 0;
50
51err4:
52    gpio_free(GPIO_NR_PALMLD_PCMCIA_READY);
53err3:
54    gpio_free(GPIO_NR_PALMLD_PCMCIA_RESET);
55err2:
56    gpio_free(GPIO_NR_PALMLD_PCMCIA_POWER);
57err1:
58    return ret;
59}
60
61static void palmld_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt)
62{
63    gpio_free(GPIO_NR_PALMLD_PCMCIA_READY);
64    gpio_free(GPIO_NR_PALMLD_PCMCIA_RESET);
65    gpio_free(GPIO_NR_PALMLD_PCMCIA_POWER);
66}
67
68static void palmld_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
69                    struct pcmcia_state *state)
70{
71    state->detect = 1; /* always inserted */
72    state->ready = !!gpio_get_value(GPIO_NR_PALMLD_PCMCIA_READY);
73    state->bvd1 = 1;
74    state->bvd2 = 1;
75    state->wrprot = 0;
76    state->vs_3v = 1;
77    state->vs_Xv = 0;
78}
79
80static int palmld_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
81                    const socket_state_t *state)
82{
83    gpio_set_value(GPIO_NR_PALMLD_PCMCIA_POWER, 1);
84    gpio_set_value(GPIO_NR_PALMLD_PCMCIA_RESET,
85            !!(state->flags & SS_RESET));
86
87    return 0;
88}
89
90static void palmld_pcmcia_socket_init(struct soc_pcmcia_socket *skt)
91{
92}
93
94static void palmld_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt)
95{
96}
97
98static struct pcmcia_low_level palmld_pcmcia_ops = {
99    .owner = THIS_MODULE,
100
101    .first = 1,
102    .nr = 1,
103
104    .hw_init = palmld_pcmcia_hw_init,
105    .hw_shutdown = palmld_pcmcia_hw_shutdown,
106
107    .socket_state = palmld_pcmcia_socket_state,
108    .configure_socket = palmld_pcmcia_configure_socket,
109
110    .socket_init = palmld_pcmcia_socket_init,
111    .socket_suspend = palmld_pcmcia_socket_suspend,
112};
113
114static struct platform_device *palmld_pcmcia_device;
115
116static int __init palmld_pcmcia_init(void)
117{
118    int ret;
119
120    if (!machine_is_palmld())
121        return -ENODEV;
122
123    palmld_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1);
124    if (!palmld_pcmcia_device)
125        return -ENOMEM;
126
127    ret = platform_device_add_data(palmld_pcmcia_device, &palmld_pcmcia_ops,
128                    sizeof(palmld_pcmcia_ops));
129
130    if (!ret)
131        ret = platform_device_add(palmld_pcmcia_device);
132
133    if (ret)
134        platform_device_put(palmld_pcmcia_device);
135
136    return ret;
137}
138
139static void __exit palmld_pcmcia_exit(void)
140{
141    platform_device_unregister(palmld_pcmcia_device);
142}
143
144module_init(palmld_pcmcia_init);
145module_exit(palmld_pcmcia_exit);
146
147MODULE_AUTHOR("Alex Osborne <ato@meshy.org>,"
148        " Marek Vasut <marek.vasut@gmail.com>");
149MODULE_DESCRIPTION("PCMCIA support for Palm LifeDrive");
150MODULE_ALIAS("platform:pxa2xx-pcmcia");
151MODULE_LICENSE("GPL");
152

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