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1/*
2 * linux/drivers/pcmcia/pxa2xx_colibri.c
3 *
4 * Driver for Toradex Colibri PXA270 CF socket
5 *
6 * Copyright (C) 2010 Marek Vasut <marek.vasut@gmail.com>
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
11 *
12 */
13
14#include <linux/module.h>
15#include <linux/platform_device.h>
16#include <linux/delay.h>
17#include <linux/gpio.h>
18
19#include <asm/mach-types.h>
20
21#include "soc_common.h"
22
23#define COLIBRI270_RESET_GPIO 53
24#define COLIBRI270_PPEN_GPIO 107
25#define COLIBRI270_BVD1_GPIO 83
26#define COLIBRI270_BVD2_GPIO 82
27#define COLIBRI270_DETECT_GPIO 84
28#define COLIBRI270_READY_GPIO 1
29
30#define COLIBRI320_RESET_GPIO 77
31#define COLIBRI320_PPEN_GPIO 57
32#define COLIBRI320_BVD1_GPIO 53
33#define COLIBRI320_BVD2_GPIO 79
34#define COLIBRI320_DETECT_GPIO 81
35#define COLIBRI320_READY_GPIO 29
36
37enum {
38 DETECT = 0,
39 READY = 1,
40 BVD1 = 2,
41 BVD2 = 3,
42 PPEN = 4,
43 RESET = 5,
44};
45
46/* Contents of this array are configured on-the-fly in init function */
47static struct gpio colibri_pcmcia_gpios[] = {
48 { 0, GPIOF_IN, "PCMCIA Detect" },
49 { 0, GPIOF_IN, "PCMCIA Ready" },
50 { 0, GPIOF_IN, "PCMCIA BVD1" },
51 { 0, GPIOF_IN, "PCMCIA BVD2" },
52 { 0, GPIOF_INIT_LOW, "PCMCIA PPEN" },
53 { 0, GPIOF_INIT_HIGH,"PCMCIA Reset" },
54};
55
56static int colibri_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
57{
58 int ret;
59
60 ret = gpio_request_array(colibri_pcmcia_gpios,
61 ARRAY_SIZE(colibri_pcmcia_gpios));
62 if (ret)
63 goto err1;
64
65 skt->socket.pci_irq = gpio_to_irq(colibri_pcmcia_gpios[READY].gpio);
66 skt->stat[SOC_STAT_CD].irq = gpio_to_irq(colibri_pcmcia_gpios[DETECT].gpio);
67 skt->stat[SOC_STAT_CD].name = "PCMCIA CD";
68
69err1:
70 return ret;
71}
72
73static void colibri_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt)
74{
75 gpio_free_array(colibri_pcmcia_gpios,
76 ARRAY_SIZE(colibri_pcmcia_gpios));
77}
78
79static void colibri_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
80 struct pcmcia_state *state)
81{
82
83 state->detect = !!gpio_get_value(colibri_pcmcia_gpios[DETECT].gpio);
84 state->ready = !!gpio_get_value(colibri_pcmcia_gpios[READY].gpio);
85 state->bvd1 = !!gpio_get_value(colibri_pcmcia_gpios[BVD1].gpio);
86 state->bvd2 = !!gpio_get_value(colibri_pcmcia_gpios[BVD2].gpio);
87 state->vs_3v = 1;
88 state->vs_Xv = 0;
89}
90
91static int
92colibri_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
93 const socket_state_t *state)
94{
95 gpio_set_value(colibri_pcmcia_gpios[PPEN].gpio,
96 !(state->Vcc == 33 && state->Vpp < 50));
97 gpio_set_value(colibri_pcmcia_gpios[RESET].gpio,
98 state->flags & SS_RESET);
99 return 0;
100}
101
102static struct pcmcia_low_level colibri_pcmcia_ops = {
103 .owner = THIS_MODULE,
104
105 .first = 0,
106 .nr = 1,
107
108 .hw_init = colibri_pcmcia_hw_init,
109 .hw_shutdown = colibri_pcmcia_hw_shutdown,
110
111 .socket_state = colibri_pcmcia_socket_state,
112 .configure_socket = colibri_pcmcia_configure_socket,
113};
114
115static struct platform_device *colibri_pcmcia_device;
116
117static int __init colibri_pcmcia_init(void)
118{
119 int ret;
120
121 if (!machine_is_colibri() && !machine_is_colibri320())
122 return -ENODEV;
123
124 colibri_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1);
125 if (!colibri_pcmcia_device)
126 return -ENOMEM;
127
128 /* Colibri PXA270 */
129 if (machine_is_colibri()) {
130 colibri_pcmcia_gpios[RESET].gpio = COLIBRI270_RESET_GPIO;
131 colibri_pcmcia_gpios[PPEN].gpio = COLIBRI270_PPEN_GPIO;
132 colibri_pcmcia_gpios[BVD1].gpio = COLIBRI270_BVD1_GPIO;
133 colibri_pcmcia_gpios[BVD2].gpio = COLIBRI270_BVD2_GPIO;
134 colibri_pcmcia_gpios[DETECT].gpio = COLIBRI270_DETECT_GPIO;
135 colibri_pcmcia_gpios[READY].gpio = COLIBRI270_READY_GPIO;
136 /* Colibri PXA320 */
137 } else if (machine_is_colibri320()) {
138 colibri_pcmcia_gpios[RESET].gpio = COLIBRI320_RESET_GPIO;
139 colibri_pcmcia_gpios[PPEN].gpio = COLIBRI320_PPEN_GPIO;
140 colibri_pcmcia_gpios[BVD1].gpio = COLIBRI320_BVD1_GPIO;
141 colibri_pcmcia_gpios[BVD2].gpio = COLIBRI320_BVD2_GPIO;
142 colibri_pcmcia_gpios[DETECT].gpio = COLIBRI320_DETECT_GPIO;
143 colibri_pcmcia_gpios[READY].gpio = COLIBRI320_READY_GPIO;
144 }
145
146 ret = platform_device_add_data(colibri_pcmcia_device,
147 &colibri_pcmcia_ops, sizeof(colibri_pcmcia_ops));
148
149 if (!ret)
150 ret = platform_device_add(colibri_pcmcia_device);
151
152 if (ret)
153 platform_device_put(colibri_pcmcia_device);
154
155 return ret;
156}
157
158static void __exit colibri_pcmcia_exit(void)
159{
160 platform_device_unregister(colibri_pcmcia_device);
161}
162
163module_init(colibri_pcmcia_init);
164module_exit(colibri_pcmcia_exit);
165
166MODULE_AUTHOR("Marek Vasut <marek.vasut@gmail.com>");
167MODULE_DESCRIPTION("PCMCIA support for Toradex Colibri PXA270/PXA320");
168MODULE_ALIAS("platform:pxa2xx-pcmcia");
169MODULE_LICENSE("GPL");
170

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