1 /*
2 * linux/drivers/pcmcia/pxa/pxa_cm_x270.c
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License version 2 as
6 * published by the Free Software Foundation.
7 *
8 * Compulab Ltd., 2003, 2007, 2008
9 * Mike Rapoport <mike@compulab.co.il>
10 *
11 */
12
13 #include <linux/platform_device.h>
14 #include <linux/irq.h>
15 #include <linux/delay.h>
16 #include <linux/gpio.h>
17
18 #include <asm/mach-types.h>
19
20 #include "soc_common.h"
21
22 #define GPIO_PCMCIA_S0_CD_VALID (84)
23 #define GPIO_PCMCIA_S0_RDYINT (82)
24 #define GPIO_PCMCIA_RESET (53)
25
26 #define PCMCIA_S0_CD_VALID IRQ_GPIO(GPIO_PCMCIA_S0_CD_VALID)
27 #define PCMCIA_S0_RDYINT IRQ_GPIO(GPIO_PCMCIA_S0_RDYINT)
28
29
30 static struct pcmcia_irqs irqs[] = {
31 { 0, PCMCIA_S0_CD_VALID, "PCMCIA0 CD" },
32 };
33
34 static int cmx270_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
35 {
36 int ret = gpio_request(GPIO_PCMCIA_RESET, "PCCard reset");
37 if (ret)
38 return ret;
39 gpio_direction_output(GPIO_PCMCIA_RESET, 0);
40
41 skt->irq = PCMCIA_S0_RDYINT;
42 ret = soc_pcmcia_request_irqs(skt, irqs, ARRAY_SIZE(irqs));
43 if (!ret)
44 gpio_free(GPIO_PCMCIA_RESET);
45
46 return ret;
47 }
48
49 static void cmx270_pcmcia_shutdown(struct soc_pcmcia_socket *skt)
50 {
51 soc_pcmcia_free_irqs(skt, irqs, ARRAY_SIZE(irqs));
52 gpio_free(GPIO_PCMCIA_RESET);
53 }
54
55
56 static void cmx270_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
57 struct pcmcia_state *state)
58 {
59 state->detect = (gpio_get_value(GPIO_PCMCIA_S0_CD_VALID) == 0) ? 1 : 0;
60 state->ready = (gpio_get_value(GPIO_PCMCIA_S0_RDYINT) == 0) ? 0 : 1;
61 state->bvd1 = 1;
62 state->bvd2 = 1;
63 state->vs_3v = 0;
64 state->vs_Xv = 0;
65 state->wrprot = 0; /* not available */
66 }
67
68
69 static int cmx270_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
70 const socket_state_t *state)
71 {
72 switch (skt->nr) {
73 case 0:
74 if (state->flags & SS_RESET) {
75 gpio_set_value(GPIO_PCMCIA_RESET, 1);
76 udelay(10);
77 gpio_set_value(GPIO_PCMCIA_RESET, 0);
78 }
79 break;
80 }
81
82 return 0;
83 }
84
85 static void cmx270_pcmcia_socket_init(struct soc_pcmcia_socket *skt)
86 {
87 }
88
89 static void cmx270_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt)
90 {
91 }
92
93
94 static struct pcmcia_low_level cmx270_pcmcia_ops __initdata = {
95 .owner = THIS_MODULE,
96 .hw_init = cmx270_pcmcia_hw_init,
97 .hw_shutdown = cmx270_pcmcia_shutdown,
98 .socket_state = cmx270_pcmcia_socket_state,
99 .configure_socket = cmx270_pcmcia_configure_socket,
100 .socket_init = cmx270_pcmcia_socket_init,
101 .socket_suspend = cmx270_pcmcia_socket_suspend,
102 .nr = 1,
103 };
104
105 static struct platform_device *cmx270_pcmcia_device;
106
107 int __init cmx270_pcmcia_init(void)
108 {
109 int ret;
110
111 cmx270_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1);
112
113 if (!cmx270_pcmcia_device)
114 return -ENOMEM;
115
116 ret = platform_device_add_data(cmx270_pcmcia_device, &cmx270_pcmcia_ops,
117 sizeof(cmx270_pcmcia_ops));
118
119 if (ret == 0) {
120 printk(KERN_INFO "Registering cm-x270 PCMCIA interface.\n");
121 ret = platform_device_add(cmx270_pcmcia_device);
122 }
123
124 if (ret)
125 platform_device_put(cmx270_pcmcia_device);
126
127 return ret;
128 }
129
130 void __exit cmx270_pcmcia_exit(void)
131 {
132 platform_device_unregister(cmx270_pcmcia_device);
133 }
134
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