1 /*
2 * linux/drivers/pcmcia/pxa/pxa_cm_x255.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 #include <mach/pxa-regs.h>
20
21 #include "soc_common.h"
22
23 #define GPIO_PCMCIA_SKTSEL (54)
24 #define GPIO_PCMCIA_S0_CD_VALID (16)
25 #define GPIO_PCMCIA_S1_CD_VALID (17)
26 #define GPIO_PCMCIA_S0_RDYINT (6)
27 #define GPIO_PCMCIA_S1_RDYINT (8)
28 #define GPIO_PCMCIA_RESET (9)
29
30 #define PCMCIA_S0_CD_VALID IRQ_GPIO(GPIO_PCMCIA_S0_CD_VALID)
31 #define PCMCIA_S1_CD_VALID IRQ_GPIO(GPIO_PCMCIA_S1_CD_VALID)
32 #define PCMCIA_S0_RDYINT IRQ_GPIO(GPIO_PCMCIA_S0_RDYINT)
33 #define PCMCIA_S1_RDYINT IRQ_GPIO(GPIO_PCMCIA_S1_RDYINT)
34
35
36 static struct pcmcia_irqs irqs[] = {
37 { 0, PCMCIA_S0_CD_VALID, "PCMCIA0 CD" },
38 { 1, PCMCIA_S1_CD_VALID, "PCMCIA1 CD" },
39 };
40
cmx255_pcmcia_hw_init(struct soc_pcmcia_socket * skt)41 static int cmx255_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
42 {
43 int ret = gpio_request(GPIO_PCMCIA_RESET, "PCCard reset");
44 if (ret)
45 return ret;
46 gpio_direction_output(GPIO_PCMCIA_RESET, 0);
47
48 skt->irq = skt->nr == 0 ? PCMCIA_S0_RDYINT : PCMCIA_S1_RDYINT;
49 ret = soc_pcmcia_request_irqs(skt, irqs, ARRAY_SIZE(irqs));
50 if (!ret)
51 gpio_free(GPIO_PCMCIA_RESET);
52
53 return ret;
54 }
55
cmx255_pcmcia_shutdown(struct soc_pcmcia_socket * skt)56 static void cmx255_pcmcia_shutdown(struct soc_pcmcia_socket *skt)
57 {
58 soc_pcmcia_free_irqs(skt, irqs, ARRAY_SIZE(irqs));
59 gpio_free(GPIO_PCMCIA_RESET);
60 }
61
62
cmx255_pcmcia_socket_state(struct soc_pcmcia_socket * skt,struct pcmcia_state * state)63 static void cmx255_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
64 struct pcmcia_state *state)
65 {
66 int cd = skt->nr ? GPIO_PCMCIA_S1_CD_VALID : GPIO_PCMCIA_S0_CD_VALID;
67 int rdy = skt->nr ? GPIO_PCMCIA_S0_RDYINT : GPIO_PCMCIA_S1_RDYINT;
68
69 state->detect = !gpio_get_value(cd);
70 state->ready = !!gpio_get_value(rdy);
71 state->bvd1 = 1;
72 state->bvd2 = 1;
73 state->vs_3v = 0;
74 state->vs_Xv = 0;
75 state->wrprot = 0; /* not available */
76 }
77
78
cmx255_pcmcia_configure_socket(struct soc_pcmcia_socket * skt,const socket_state_t * state)79 static int cmx255_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
80 const socket_state_t *state)
81 {
82 switch (skt->nr) {
83 case 0:
84 if (state->flags & SS_RESET) {
85 gpio_set_value(GPIO_PCMCIA_SKTSEL, 0);
86 udelay(1);
87 gpio_set_value(GPIO_PCMCIA_RESET, 1);
88 udelay(10);
89 gpio_set_value(GPIO_PCMCIA_RESET, 0);
90 }
91 break;
92 case 1:
93 if (state->flags & SS_RESET) {
94 gpio_set_value(GPIO_PCMCIA_SKTSEL, 1);
95 udelay(1);
96 gpio_set_value(GPIO_PCMCIA_RESET, 1);
97 udelay(10);
98 gpio_set_value(GPIO_PCMCIA_RESET, 0);
99 }
100 break;
101 }
102
103 return 0;
104 }
105
cmx255_pcmcia_socket_init(struct soc_pcmcia_socket * skt)106 static void cmx255_pcmcia_socket_init(struct soc_pcmcia_socket *skt)
107 {
108 }
109
cmx255_pcmcia_socket_suspend(struct soc_pcmcia_socket * skt)110 static void cmx255_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt)
111 {
112 }
113
114
115 static struct pcmcia_low_level cmx255_pcmcia_ops __initdata = {
116 .owner = THIS_MODULE,
117 .hw_init = cmx255_pcmcia_hw_init,
118 .hw_shutdown = cmx255_pcmcia_shutdown,
119 .socket_state = cmx255_pcmcia_socket_state,
120 .configure_socket = cmx255_pcmcia_configure_socket,
121 .socket_init = cmx255_pcmcia_socket_init,
122 .socket_suspend = cmx255_pcmcia_socket_suspend,
123 .nr = 1,
124 };
125
126 static struct platform_device *cmx255_pcmcia_device;
127
cmx255_pcmcia_init(void)128 int __init cmx255_pcmcia_init(void)
129 {
130 int ret;
131
132 cmx255_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1);
133
134 if (!cmx255_pcmcia_device)
135 return -ENOMEM;
136
137 ret = platform_device_add_data(cmx255_pcmcia_device, &cmx255_pcmcia_ops,
138 sizeof(cmx255_pcmcia_ops));
139
140 if (ret == 0) {
141 printk(KERN_INFO "Registering cm-x255 PCMCIA interface.\n");
142 ret = platform_device_add(cmx255_pcmcia_device);
143 }
144
145 if (ret)
146 platform_device_put(cmx255_pcmcia_device);
147
148 return ret;
149 }
150
cmx255_pcmcia_exit(void)151 void __exit cmx255_pcmcia_exit(void)
152 {
153 platform_device_unregister(cmx255_pcmcia_device);
154 }
155