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
36 static 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
sg2_pcmcia_hw_init(struct soc_pcmcia_socket * skt)41 static 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
sg2_pcmcia_socket_state(struct soc_pcmcia_socket * skt,struct pcmcia_state * state)50 static 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
sg2_pcmcia_configure_socket(struct soc_pcmcia_socket * skt,const socket_state_t * state)59 static 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
86 static 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
94 static struct platform_device *sg2_pcmcia_device;
95
sg2_pcmcia_init(void)96 static 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;
122 error_free_gpios:
123 gpio_free_array(sg2_pcmcia_gpios, ARRAY_SIZE(sg2_pcmcia_gpios));
124 error_put_platform_device:
125 platform_device_put(sg2_pcmcia_device);
126
127 return ret;
128 }
129
sg2_pcmcia_exit(void)130 static 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
136 fs_initcall(sg2_pcmcia_init);
137 module_exit(sg2_pcmcia_exit);
138
139 MODULE_LICENSE("GPL");
140 MODULE_ALIAS("platform:pxa2xx-pcmcia");
141
