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1/*
2 * linux/drivers/pcmcia/pxa2xx_stargate2.c
3 *
4 * Stargate 2 PCMCIA specific routines.
5 *
6 * Created: December 6, 2005
7 * Author: Ed C. Epp
8 * Copyright: Intel Corp 2005
9 * Jonathan Cameron <jic23@cam.ac.uk> 2009
10 *
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License version 2 as
13 * published by the Free Software Foundation.
14 */
15
16#include <linux/module.h>
17#include <linux/init.h>
18#include <linux/kernel.h>
19#include <linux/interrupt.h>
20#include <linux/delay.h>
21#include <linux/platform_device.h>
22#include <linux/gpio.h>
23
24#include <pcmcia/ss.h>
25
26#include <asm/irq.h>
27#include <asm/mach-types.h>
28
29#include "soc_common.h"
30
31#define SG2_S0_POWER_CTL 108
32#define SG2_S0_GPIO_RESET 82
33#define SG2_S0_GPIO_DETECT 53
34#define SG2_S0_GPIO_READY 81
35
36static struct gpio sg2_pcmcia_gpios[] = {
37 { SG2_S0_GPIO_RESET, GPIOF_OUT_INIT_HIGH, "PCMCIA Reset" },
38 { SG2_S0_POWER_CTL, GPIOF_OUT_INIT_HIGH, "PCMCIA Power Ctrl" },
39};
40
41static int sg2_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
42{
43 skt->stat[SOC_STAT_CD].gpio = SG2_S0_GPIO_DETECT;
44 skt->stat[SOC_STAT_CD].name = "PCMCIA0 CD";
45 skt->stat[SOC_STAT_RDY].gpio = SG2_S0_GPIO_READY;
46 skt->stat[SOC_STAT_RDY].name = "PCMCIA0 RDY";
47 return 0;
48}
49
50static void sg2_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
51 struct pcmcia_state *state)
52{
53 state->bvd1 = 0; /* not available - battery detect on card */
54 state->bvd2 = 0; /* not available */
55 state->vs_3v = 1; /* not available - voltage detect for card */
56 state->vs_Xv = 0; /* not available */
57}
58
59static int sg2_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
60 const socket_state_t *state)
61{
62 /* Enable card power */
63 switch (state->Vcc) {
64 case 0:
65 /* sets power ctl register high */
66 gpio_set_value(SG2_S0_POWER_CTL, 1);
67 break;
68 case 33:
69 case 50:
70 /* sets power control register low (clear) */
71 gpio_set_value(SG2_S0_POWER_CTL, 0);
72 msleep(100);
73 break;
74 default:
75 pr_err("%s(): bad Vcc %u\n",
76 __func__, state->Vcc);
77 return -1;
78 }
79
80 /* reset */
81 gpio_set_value(SG2_S0_GPIO_RESET, !!(state->flags & SS_RESET));
82
83 return 0;
84}
85
86static struct pcmcia_low_level sg2_pcmcia_ops __initdata = {
87 .owner = THIS_MODULE,
88 .hw_init = sg2_pcmcia_hw_init,
89 .socket_state = sg2_pcmcia_socket_state,
90 .configure_socket = sg2_pcmcia_configure_socket,
91 .nr = 1,
92};
93
94static struct platform_device *sg2_pcmcia_device;
95
96static int __init sg2_pcmcia_init(void)
97{
98 int ret;
99
100 if (!machine_is_stargate2())
101 return -ENODEV;
102
103 sg2_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1);
104 if (!sg2_pcmcia_device)
105 return -ENOMEM;
106
107 ret = gpio_request_array(sg2_pcmcia_gpios, ARRAY_SIZE(sg2_pcmcia_gpios));
108 if (ret)
109 goto error_put_platform_device;
110
111 ret = platform_device_add_data(sg2_pcmcia_device,
112 &sg2_pcmcia_ops,
113 sizeof(sg2_pcmcia_ops));
114 if (ret)
115 goto error_free_gpios;
116
117 ret = platform_device_add(sg2_pcmcia_device);
118 if (ret)
119 goto error_free_gpios;
120
121 return 0;
122error_free_gpios:
123 gpio_free_array(sg2_pcmcia_gpios, ARRAY_SIZE(sg2_pcmcia_gpios));
124error_put_platform_device:
125 platform_device_put(sg2_pcmcia_device);
126
127 return ret;
128}
129
130static void __exit sg2_pcmcia_exit(void)
131{
132 platform_device_unregister(sg2_pcmcia_device);
133 gpio_free_array(sg2_pcmcia_gpios, ARRAY_SIZE(sg2_pcmcia_gpios));
134}
135
136fs_initcall(sg2_pcmcia_init);
137module_exit(sg2_pcmcia_exit);
138
139MODULE_LICENSE("GPL");
140MODULE_ALIAS("platform:pxa2xx-pcmcia");
141

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