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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 | |
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 | |
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 | |
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 | |
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 | |
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 |
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