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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 | |
37 | enum { |
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 */ |
47 | static 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 | |
56 | static 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 | |
69 | err1: |
70 | return ret; |
71 | } |
72 | |
73 | static 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 | |
79 | static 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 | |
91 | static int |
92 | colibri_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 | |
102 | static 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 | |
115 | static struct platform_device *colibri_pcmcia_device; |
116 | |
117 | static 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 | |
158 | static void __exit colibri_pcmcia_exit(void) |
159 | { |
160 | platform_device_unregister(colibri_pcmcia_device); |
161 | } |
162 | |
163 | module_init(colibri_pcmcia_init); |
164 | module_exit(colibri_pcmcia_exit); |
165 | |
166 | MODULE_AUTHOR("Marek Vasut <marek.vasut@gmail.com>"); |
167 | MODULE_DESCRIPTION("PCMCIA support for Toradex Colibri PXA270/PXA320"); |
168 | MODULE_ALIAS("platform:pxa2xx-pcmcia"); |
169 | MODULE_LICENSE("GPL"); |
170 |
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