1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
|
/*
* linux/drivers/pcmcia/pxa2xx_stargate2.c
*
* Stargate 2 PCMCIA specific routines.
*
* Created: December 6, 2005
* Author: Ed C. Epp
* Copyright: Intel Corp 2005
* Jonathan Cameron <jic23@cam.ac.uk> 2009
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/module.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/interrupt.h>
#include <linux/delay.h>
#include <linux/platform_device.h>
#include <linux/gpio.h>
#include <pcmcia/ss.h>
#include <asm/irq.h>
#include <asm/mach-types.h>
#include "soc_common.h"
#define SG2_S0_BUFF_CTL 120
#define SG2_S0_POWER_CTL 108
#define SG2_S0_GPIO_RESET 82
#define SG2_S0_GPIO_DETECT 53
#define SG2_S0_GPIO_READY 81
static struct pcmcia_irqs irqs[] = {
{ 0, IRQ_GPIO(SG2_S0_GPIO_DETECT), "PCMCIA0 CD" },
};
static int sg2_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
{
skt->socket.pci_irq = IRQ_GPIO(SG2_S0_GPIO_READY);
return soc_pcmcia_request_irqs(skt, irqs, ARRAY_SIZE(irqs));
}
static void sg2_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt)
{
soc_pcmcia_free_irqs(skt, irqs, ARRAY_SIZE(irqs));
}
static void sg2_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
struct pcmcia_state *state)
{
state->detect = !gpio_get_value(SG2_S0_GPIO_DETECT);
state->ready = !!gpio_get_value(SG2_S0_GPIO_READY);
state->bvd1 = 0; /* not available - battery detect on card */
state->bvd2 = 0; /* not available */
state->vs_3v = 1; /* not available - voltage detect for card */
state->vs_Xv = 0; /* not available */
state->wrprot = 0; /* not available - write protect */
}
static int sg2_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
const socket_state_t *state)
{
/* Enable card power */
switch (state->Vcc) {
case 0:
/* sets power ctl register high */
gpio_set_value(SG2_S0_POWER_CTL, 1);
break;
case 33:
case 50:
/* sets power control register low (clear) */
gpio_set_value(SG2_S0_POWER_CTL, 0);
msleep(100);
break;
default:
pr_err("%s(): bad Vcc %u\n",
__func__, state->Vcc);
return -1;
}
/* reset */
gpio_set_value(SG2_S0_GPIO_RESET, !!(state->flags & SS_RESET));
return 0;
}
static void sg2_pcmcia_socket_init(struct soc_pcmcia_socket *skt)
{
soc_pcmcia_enable_irqs(skt, irqs, ARRAY_SIZE(irqs));
}
static void sg2_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt)
{
soc_pcmcia_disable_irqs(skt, irqs, ARRAY_SIZE(irqs));
}
static struct pcmcia_low_level sg2_pcmcia_ops __initdata = {
.owner = THIS_MODULE,
.hw_init = sg2_pcmcia_hw_init,
.hw_shutdown = sg2_pcmcia_hw_shutdown,
.socket_state = sg2_pcmcia_socket_state,
.configure_socket = sg2_pcmcia_configure_socket,
.socket_init = sg2_pcmcia_socket_init,
.socket_suspend = sg2_pcmcia_socket_suspend,
.nr = 1,
};
static struct platform_device *sg2_pcmcia_device;
static int __init sg2_pcmcia_init(void)
{
int ret;
if (!machine_is_stargate2())
return -ENODEV;
sg2_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1);
if (!sg2_pcmcia_device)
return -ENOMEM;
ret = gpio_request(SG2_S0_BUFF_CTL, "SG2 CF buff ctl");
if (ret)
goto error_put_platform_device;
ret = gpio_request(SG2_S0_POWER_CTL, "SG2 CF power ctl");
if (ret)
goto error_free_gpio_buff_ctl;
ret = gpio_request(SG2_S0_GPIO_RESET, "SG2 CF reset");
if (ret)
goto error_free_gpio_power_ctl;
/* Set gpio directions */
gpio_direction_output(SG2_S0_BUFF_CTL, 0);
gpio_direction_output(SG2_S0_POWER_CTL, 1);
gpio_direction_output(SG2_S0_GPIO_RESET, 1);
ret = platform_device_add_data(sg2_pcmcia_device,
&sg2_pcmcia_ops,
sizeof(sg2_pcmcia_ops));
if (ret)
goto error_free_gpio_reset;
ret = platform_device_add(sg2_pcmcia_device);
if (ret)
goto error_free_gpio_reset;
return 0;
error_free_gpio_reset:
gpio_free(SG2_S0_GPIO_RESET);
error_free_gpio_power_ctl:
gpio_free(SG2_S0_POWER_CTL);
error_free_gpio_buff_ctl:
gpio_free(SG2_S0_BUFF_CTL);
error_put_platform_device:
platform_device_put(sg2_pcmcia_device);
return ret;
}
static void __exit sg2_pcmcia_exit(void)
{
platform_device_unregister(sg2_pcmcia_device);
gpio_free(SG2_S0_BUFF_CTL);
gpio_free(SG2_S0_POWER_CTL);
gpio_free(SG2_S0_GPIO_RESET);
}
fs_initcall(sg2_pcmcia_init);
module_exit(sg2_pcmcia_exit);
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:pxa2xx-pcmcia");
|
