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1/*
2 * linux/drivers/pcmcia/pxa2xx_palmtc.c
3 *
4 * Driver for Palm Tungsten|C PCMCIA
5 *
6 * Copyright (C) 2008 Alex Osborne <ato@meshy.org>
7 * Copyright (C) 2009-2011 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#include <linux/delay.h>
19
20#include <asm/mach-types.h>
21#include <mach/palmtc.h>
22#include "soc_common.h"
23
24static struct gpio palmtc_pcmcia_gpios[] = {
25 { GPIO_NR_PALMTC_PCMCIA_POWER1, GPIOF_INIT_LOW, "PCMCIA Power 1" },
26 { GPIO_NR_PALMTC_PCMCIA_POWER2, GPIOF_INIT_LOW, "PCMCIA Power 2" },
27 { GPIO_NR_PALMTC_PCMCIA_POWER3, GPIOF_INIT_LOW, "PCMCIA Power 3" },
28 { GPIO_NR_PALMTC_PCMCIA_RESET, GPIOF_INIT_HIGH,"PCMCIA Reset" },
29 { GPIO_NR_PALMTC_PCMCIA_PWRREADY, GPIOF_IN, "PCMCIA Power Ready" },
30};
31
32static int palmtc_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
33{
34 int ret;
35
36 ret = gpio_request_array(palmtc_pcmcia_gpios,
37 ARRAY_SIZE(palmtc_pcmcia_gpios));
38
39 skt->stat[SOC_STAT_RDY].gpio = GPIO_NR_PALMTC_PCMCIA_READY;
40 skt->stat[SOC_STAT_RDY].name = "PCMCIA Ready";
41
42 return ret;
43}
44
45static void palmtc_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt)
46{
47 gpio_free_array(palmtc_pcmcia_gpios, ARRAY_SIZE(palmtc_pcmcia_gpios));
48}
49
50static void palmtc_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
51 struct pcmcia_state *state)
52{
53 state->detect = 1; /* always inserted */
54 state->vs_3v = 1;
55 state->vs_Xv = 0;
56}
57
58static int palmtc_wifi_powerdown(void)
59{
60 gpio_set_value(GPIO_NR_PALMTC_PCMCIA_RESET, 1);
61 gpio_set_value(GPIO_NR_PALMTC_PCMCIA_POWER2, 0);
62 mdelay(40);
63 gpio_set_value(GPIO_NR_PALMTC_PCMCIA_POWER1, 0);
64 return 0;
65}
66
67static int palmtc_wifi_powerup(void)
68{
69 int timeout = 50;
70
71 gpio_set_value(GPIO_NR_PALMTC_PCMCIA_POWER3, 1);
72 mdelay(50);
73
74 /* Power up the card, 1.8V first, after a while 3.3V */
75 gpio_set_value(GPIO_NR_PALMTC_PCMCIA_POWER1, 1);
76 mdelay(100);
77 gpio_set_value(GPIO_NR_PALMTC_PCMCIA_POWER2, 1);
78
79 /* Wait till the card is ready */
80 while (!gpio_get_value(GPIO_NR_PALMTC_PCMCIA_PWRREADY) &&
81 timeout) {
82 mdelay(1);
83 timeout--;
84 }
85
86 /* Power down the WiFi in case of error */
87 if (!timeout) {
88 palmtc_wifi_powerdown();
89 return 1;
90 }
91
92 /* Reset the card */
93 gpio_set_value(GPIO_NR_PALMTC_PCMCIA_RESET, 1);
94 mdelay(20);
95 gpio_set_value(GPIO_NR_PALMTC_PCMCIA_RESET, 0);
96 mdelay(25);
97
98 gpio_set_value(GPIO_NR_PALMTC_PCMCIA_POWER3, 0);
99
100 return 0;
101}
102
103static int palmtc_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
104 const socket_state_t *state)
105{
106 int ret = 1;
107
108 if (state->Vcc == 0)
109 ret = palmtc_wifi_powerdown();
110 else if (state->Vcc == 33)
111 ret = palmtc_wifi_powerup();
112
113 return ret;
114}
115
116static struct pcmcia_low_level palmtc_pcmcia_ops = {
117 .owner = THIS_MODULE,
118
119 .first = 0,
120 .nr = 1,
121
122 .hw_init = palmtc_pcmcia_hw_init,
123 .hw_shutdown = palmtc_pcmcia_hw_shutdown,
124
125 .socket_state = palmtc_pcmcia_socket_state,
126 .configure_socket = palmtc_pcmcia_configure_socket,
127};
128
129static struct platform_device *palmtc_pcmcia_device;
130
131static int __init palmtc_pcmcia_init(void)
132{
133 int ret;
134
135 if (!machine_is_palmtc())
136 return -ENODEV;
137
138 palmtc_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1);
139 if (!palmtc_pcmcia_device)
140 return -ENOMEM;
141
142 ret = platform_device_add_data(palmtc_pcmcia_device, &palmtc_pcmcia_ops,
143 sizeof(palmtc_pcmcia_ops));
144
145 if (!ret)
146 ret = platform_device_add(palmtc_pcmcia_device);
147
148 if (ret)
149 platform_device_put(palmtc_pcmcia_device);
150
151 return ret;
152}
153
154static void __exit palmtc_pcmcia_exit(void)
155{
156 platform_device_unregister(palmtc_pcmcia_device);
157}
158
159module_init(palmtc_pcmcia_init);
160module_exit(palmtc_pcmcia_exit);
161
162MODULE_AUTHOR("Alex Osborne <ato@meshy.org>,"
163 " Marek Vasut <marek.vasut@gmail.com>");
164MODULE_DESCRIPTION("PCMCIA support for Palm Tungsten|C");
165MODULE_ALIAS("platform:pxa2xx-pcmcia");
166MODULE_LICENSE("GPL");
167

Warning: That file was not part of the compilation database. It may have many parsing errors.