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960c0aca MV |
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 | ||
fd62999b MV |
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 | ||
e593106c MV |
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 | }; | |
960c0aca | 55 | |
960c0aca MV |
56 | static int colibri_pcmcia_hw_init(struct soc_pcmcia_socket *skt) |
57 | { | |
58 | int ret; | |
59 | ||
e593106c MV |
60 | ret = gpio_request_array(colibri_pcmcia_gpios, |
61 | ARRAY_SIZE(colibri_pcmcia_gpios)); | |
960c0aca MV |
62 | if (ret) |
63 | goto err1; | |
960c0aca | 64 | |
e593106c | 65 | skt->socket.pci_irq = gpio_to_irq(colibri_pcmcia_gpios[READY].gpio); |
a9bb5a4b RK |
66 | skt->stat[SOC_STAT_CD].irq = gpio_to_irq(colibri_pcmcia_gpios[DETECT].gpio); |
67 | skt->stat[SOC_STAT_CD].name = "PCMCIA CD"; | |
960c0aca | 68 | |
960c0aca MV |
69 | err1: |
70 | return ret; | |
71 | } | |
72 | ||
73 | static void colibri_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt) | |
74 | { | |
e593106c MV |
75 | gpio_free_array(colibri_pcmcia_gpios, |
76 | ARRAY_SIZE(colibri_pcmcia_gpios)); | |
960c0aca MV |
77 | } |
78 | ||
79 | static void colibri_pcmcia_socket_state(struct soc_pcmcia_socket *skt, | |
80 | struct pcmcia_state *state) | |
81 | { | |
82 | ||
e593106c MV |
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); | |
960c0aca MV |
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 | { | |
e593106c | 95 | gpio_set_value(colibri_pcmcia_gpios[PPEN].gpio, |
960c0aca | 96 | !(state->Vcc == 33 && state->Vpp < 50)); |
e593106c MV |
97 | gpio_set_value(colibri_pcmcia_gpios[RESET].gpio, |
98 | state->flags & SS_RESET); | |
960c0aca MV |
99 | return 0; |
100 | } | |
101 | ||
960c0aca MV |
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, | |
960c0aca MV |
113 | }; |
114 | ||
115 | static struct platform_device *colibri_pcmcia_device; | |
116 | ||
117 | static int __init colibri_pcmcia_init(void) | |
118 | { | |
119 | int ret; | |
120 | ||
8d9bd900 DES |
121 | if (!machine_is_colibri() && !machine_is_colibri320()) |
122 | return -ENODEV; | |
123 | ||
960c0aca MV |
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()) { | |
e593106c MV |
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; | |
fd62999b MV |
136 | /* Colibri PXA320 */ |
137 | } else if (machine_is_colibri320()) { | |
e593106c MV |
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; | |
960c0aca MV |
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>"); | |
fd62999b | 167 | MODULE_DESCRIPTION("PCMCIA support for Toradex Colibri PXA270/PXA320"); |
960c0aca MV |
168 | MODULE_ALIAS("platform:pxa2xx-pcmcia"); |
169 | MODULE_LICENSE("GPL"); |