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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 | |
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 | |
50 | static void cmx255_pcmcia_shutdown(struct soc_pcmcia_socket *skt) |
51 | { |
52 | gpio_free(GPIO_PCMCIA_RESET); |
53 | } |
54 | |
55 | |
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 | |
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 | |
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 | |
125 | void __exit cmx255_pcmcia_exit(void) |
126 | { |
127 | platform_device_unregister(cmx255_pcmcia_device); |
128 | } |
129 |
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