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 #include <linux/export.h>
18
19 #include "soc_common.h"
20
21 #define GPIO_PCMCIA_SKTSEL (54)
22 #define GPIO_PCMCIA_S0_CD_VALID (16)
23 #define GPIO_PCMCIA_S1_CD_VALID (17)
24 #define GPIO_PCMCIA_S0_RDYINT (6)
25 #define GPIO_PCMCIA_S1_RDYINT (8)
26 #define GPIO_PCMCIA_RESET (9)
27
cmx255_pcmcia_hw_init(struct soc_pcmcia_socket * skt)28 static int cmx255_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
29 {
30 int ret = gpio_request(GPIO_PCMCIA_RESET, "PCCard reset");
31 if (ret)
32 return ret;
33 gpio_direction_output(GPIO_PCMCIA_RESET, 0);
34
35 if (skt->nr == 0) {
36 skt->stat[SOC_STAT_CD].gpio = GPIO_PCMCIA_S0_CD_VALID;
37 skt->stat[SOC_STAT_CD].name = "PCMCIA0 CD";
38 skt->stat[SOC_STAT_RDY].gpio = GPIO_PCMCIA_S0_RDYINT;
39 skt->stat[SOC_STAT_RDY].name = "PCMCIA0 RDY";
40 } else {
41 skt->stat[SOC_STAT_CD].gpio = GPIO_PCMCIA_S1_CD_VALID;
42 skt->stat[SOC_STAT_CD].name = "PCMCIA1 CD";
43 skt->stat[SOC_STAT_RDY].gpio = GPIO_PCMCIA_S1_RDYINT;
44 skt->stat[SOC_STAT_RDY].name = "PCMCIA1 RDY";
45 }
46
47 return 0;
48 }
49
cmx255_pcmcia_shutdown(struct soc_pcmcia_socket * skt)50 static void cmx255_pcmcia_shutdown(struct soc_pcmcia_socket *skt)
51 {
52 gpio_free(GPIO_PCMCIA_RESET);
53 }
54
55
cmx255_pcmcia_socket_state(struct soc_pcmcia_socket * skt,struct pcmcia_state * state)56 static void cmx255_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
57 struct pcmcia_state *state)
58 {
59 state->vs_3v = 0;
60 state->vs_Xv = 0;
61 }
62
63
cmx255_pcmcia_configure_socket(struct soc_pcmcia_socket * skt,const socket_state_t * state)64 static int cmx255_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
65 const socket_state_t *state)
66 {
67 switch (skt->nr) {
68 case 0:
69 if (state->flags & SS_RESET) {
70 gpio_set_value(GPIO_PCMCIA_SKTSEL, 0);
71 udelay(1);
72 gpio_set_value(GPIO_PCMCIA_RESET, 1);
73 udelay(10);
74 gpio_set_value(GPIO_PCMCIA_RESET, 0);
75 }
76 break;
77 case 1:
78 if (state->flags & SS_RESET) {
79 gpio_set_value(GPIO_PCMCIA_SKTSEL, 1);
80 udelay(1);
81 gpio_set_value(GPIO_PCMCIA_RESET, 1);
82 udelay(10);
83 gpio_set_value(GPIO_PCMCIA_RESET, 0);
84 }
85 break;
86 }
87
88 return 0;
89 }
90
91 static struct pcmcia_low_level cmx255_pcmcia_ops __initdata = {
92 .owner = THIS_MODULE,
93 .hw_init = cmx255_pcmcia_hw_init,
94 .hw_shutdown = cmx255_pcmcia_shutdown,
95 .socket_state = cmx255_pcmcia_socket_state,
96 .configure_socket = cmx255_pcmcia_configure_socket,
97 .nr = 1,
98 };
99
100 static struct platform_device *cmx255_pcmcia_device;
101
cmx255_pcmcia_init(void)102 int __init cmx255_pcmcia_init(void)
103 {
104 int ret;
105
106 cmx255_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1);
107
108 if (!cmx255_pcmcia_device)
109 return -ENOMEM;
110
111 ret = platform_device_add_data(cmx255_pcmcia_device, &cmx255_pcmcia_ops,
112 sizeof(cmx255_pcmcia_ops));
113
114 if (ret == 0) {
115 printk(KERN_INFO "Registering cm-x255 PCMCIA interface.\n");
116 ret = platform_device_add(cmx255_pcmcia_device);
117 }
118
119 if (ret)
120 platform_device_put(cmx255_pcmcia_device);
121
122 return ret;
123 }
124
cmx255_pcmcia_exit(void)125 void __exit cmx255_pcmcia_exit(void)
126 {
127 platform_device_unregister(cmx255_pcmcia_device);
128 }
129