1 /*
2 * linux/drivers/pcmcia/pxa2xx_vpac270.c
3 *
4 * Driver for Voipac PXA270 PCMCIA and CF sockets
5 *
6 * Copyright (C) 2010-2011 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/gpio.h>
15 #include <linux/module.h>
16 #include <linux/platform_device.h>
17
18 #include <asm/mach-types.h>
19
20 #include <asm/gpio.h>
21 #include <mach/vpac270.h>
22
23 #include "soc_common.h"
24
25 static struct gpio vpac270_pcmcia_gpios[] = {
26 { GPIO107_VPAC270_PCMCIA_PPEN, GPIOF_INIT_LOW, "PCMCIA PPEN" },
27 { GPIO11_VPAC270_PCMCIA_RESET, GPIOF_INIT_LOW, "PCMCIA Reset" },
28 };
29
30 static struct gpio vpac270_cf_gpios[] = {
31 { GPIO16_VPAC270_CF_RESET, GPIOF_INIT_LOW, "CF Reset" },
32 };
33
vpac270_pcmcia_hw_init(struct soc_pcmcia_socket * skt)34 static int vpac270_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
35 {
36 int ret;
37
38 if (skt->nr == 0) {
39 ret = gpio_request_array(vpac270_pcmcia_gpios,
40 ARRAY_SIZE(vpac270_pcmcia_gpios));
41
42 skt->stat[SOC_STAT_CD].gpio = GPIO84_VPAC270_PCMCIA_CD;
43 skt->stat[SOC_STAT_CD].name = "PCMCIA CD";
44 skt->stat[SOC_STAT_RDY].gpio = GPIO35_VPAC270_PCMCIA_RDY;
45 skt->stat[SOC_STAT_RDY].name = "PCMCIA Ready";
46 } else {
47 ret = gpio_request_array(vpac270_cf_gpios,
48 ARRAY_SIZE(vpac270_cf_gpios));
49
50 skt->stat[SOC_STAT_CD].gpio = GPIO17_VPAC270_CF_CD;
51 skt->stat[SOC_STAT_CD].name = "CF CD";
52 skt->stat[SOC_STAT_RDY].gpio = GPIO12_VPAC270_CF_RDY;
53 skt->stat[SOC_STAT_RDY].name = "CF Ready";
54 }
55
56 return ret;
57 }
58
vpac270_pcmcia_hw_shutdown(struct soc_pcmcia_socket * skt)59 static void vpac270_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt)
60 {
61 if (skt->nr == 0)
62 gpio_free_array(vpac270_pcmcia_gpios,
63 ARRAY_SIZE(vpac270_pcmcia_gpios));
64 else
65 gpio_free_array(vpac270_cf_gpios,
66 ARRAY_SIZE(vpac270_cf_gpios));
67 }
68
vpac270_pcmcia_socket_state(struct soc_pcmcia_socket * skt,struct pcmcia_state * state)69 static void vpac270_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
70 struct pcmcia_state *state)
71 {
72 state->vs_3v = 1;
73 state->vs_Xv = 0;
74 }
75
76 static int
vpac270_pcmcia_configure_socket(struct soc_pcmcia_socket * skt,const socket_state_t * state)77 vpac270_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
78 const socket_state_t *state)
79 {
80 if (skt->nr == 0) {
81 gpio_set_value(GPIO11_VPAC270_PCMCIA_RESET,
82 (state->flags & SS_RESET));
83 gpio_set_value(GPIO107_VPAC270_PCMCIA_PPEN,
84 !(state->Vcc == 33 || state->Vcc == 50));
85 } else {
86 gpio_set_value(GPIO16_VPAC270_CF_RESET,
87 (state->flags & SS_RESET));
88 }
89
90 return 0;
91 }
92
93 static struct pcmcia_low_level vpac270_pcmcia_ops = {
94 .owner = THIS_MODULE,
95
96 .first = 0,
97 .nr = 2,
98
99 .hw_init = vpac270_pcmcia_hw_init,
100 .hw_shutdown = vpac270_pcmcia_hw_shutdown,
101
102 .socket_state = vpac270_pcmcia_socket_state,
103 .configure_socket = vpac270_pcmcia_configure_socket,
104 };
105
106 static struct platform_device *vpac270_pcmcia_device;
107
vpac270_pcmcia_init(void)108 static int __init vpac270_pcmcia_init(void)
109 {
110 int ret;
111
112 if (!machine_is_vpac270())
113 return -ENODEV;
114
115 vpac270_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1);
116 if (!vpac270_pcmcia_device)
117 return -ENOMEM;
118
119 ret = platform_device_add_data(vpac270_pcmcia_device,
120 &vpac270_pcmcia_ops, sizeof(vpac270_pcmcia_ops));
121
122 if (!ret)
123 ret = platform_device_add(vpac270_pcmcia_device);
124
125 if (ret)
126 platform_device_put(vpac270_pcmcia_device);
127
128 return ret;
129 }
130
vpac270_pcmcia_exit(void)131 static void __exit vpac270_pcmcia_exit(void)
132 {
133 platform_device_unregister(vpac270_pcmcia_device);
134 }
135
136 module_init(vpac270_pcmcia_init);
137 module_exit(vpac270_pcmcia_exit);
138
139 MODULE_AUTHOR("Marek Vasut <marek.vasut@gmail.com>");
140 MODULE_DESCRIPTION("PCMCIA support for Voipac PXA270");
141 MODULE_ALIAS("platform:pxa2xx-pcmcia");
142 MODULE_LICENSE("GPL");
143