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87944f33 MR |
1 | /* |
2 | * linux/drivers/pcmcia/pxa/pxa_cm_x270.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 | * | |
779c545d | 8 | * Compulab Ltd., 2003, 2007, 2008 |
87944f33 MR |
9 | * Mike Rapoport <mike@compulab.co.il> |
10 | * | |
11 | */ | |
12 | ||
87944f33 MR |
13 | #include <linux/platform_device.h> |
14 | #include <linux/irq.h> | |
15 | #include <linux/delay.h> | |
779c545d | 16 | #include <linux/gpio.h> |
87944f33 | 17 | |
04ba0f65 | 18 | #include <asm/mach-types.h> |
a09e64fb | 19 | #include <mach/pxa-regs.h> |
87944f33 MR |
20 | |
21 | #include "soc_common.h" | |
22 | ||
779c545d MR |
23 | #define GPIO_PCMCIA_S0_CD_VALID (84) |
24 | #define GPIO_PCMCIA_S0_RDYINT (82) | |
25 | #define GPIO_PCMCIA_RESET (53) | |
26 | ||
27 | #define PCMCIA_S0_CD_VALID IRQ_GPIO(GPIO_PCMCIA_S0_CD_VALID) | |
28 | #define PCMCIA_S0_RDYINT IRQ_GPIO(GPIO_PCMCIA_S0_RDYINT) | |
29 | ||
30 | ||
87944f33 MR |
31 | static struct pcmcia_irqs irqs[] = { |
32 | { 0, PCMCIA_S0_CD_VALID, "PCMCIA0 CD" }, | |
87944f33 MR |
33 | }; |
34 | ||
35 | static int cmx270_pcmcia_hw_init(struct soc_pcmcia_socket *skt) | |
36 | { | |
779c545d MR |
37 | int ret = gpio_request(GPIO_PCMCIA_RESET, "PCCard reset"); |
38 | if (ret) | |
39 | return ret; | |
40 | gpio_direction_output(GPIO_PCMCIA_RESET, 0); | |
41 | ||
42 | skt->irq = PCMCIA_S0_RDYINT; | |
43 | ret = soc_pcmcia_request_irqs(skt, irqs, ARRAY_SIZE(irqs)); | |
44 | if (!ret) | |
45 | gpio_free(GPIO_PCMCIA_RESET); | |
46 | ||
47 | return ret; | |
87944f33 MR |
48 | } |
49 | ||
50 | static void cmx270_pcmcia_shutdown(struct soc_pcmcia_socket *skt) | |
51 | { | |
52 | soc_pcmcia_free_irqs(skt, irqs, ARRAY_SIZE(irqs)); | |
779c545d | 53 | gpio_free(GPIO_PCMCIA_RESET); |
87944f33 MR |
54 | } |
55 | ||
56 | ||
57 | static void cmx270_pcmcia_socket_state(struct soc_pcmcia_socket *skt, | |
58 | struct pcmcia_state *state) | |
59 | { | |
779c545d MR |
60 | state->detect = (gpio_get_value(GPIO_PCMCIA_S0_CD_VALID) == 0) ? 1 : 0; |
61 | state->ready = (gpio_get_value(GPIO_PCMCIA_S0_RDYINT) == 0) ? 0 : 1; | |
87944f33 MR |
62 | state->bvd1 = 1; |
63 | state->bvd2 = 1; | |
64 | state->vs_3v = 0; | |
65 | state->vs_Xv = 0; | |
66 | state->wrprot = 0; /* not available */ | |
67 | } | |
68 | ||
69 | ||
70 | static int cmx270_pcmcia_configure_socket(struct soc_pcmcia_socket *skt, | |
71 | const socket_state_t *state) | |
72 | { | |
87944f33 MR |
73 | switch (skt->nr) { |
74 | case 0: | |
75 | if (state->flags & SS_RESET) { | |
779c545d | 76 | gpio_set_value(GPIO_PCMCIA_RESET, 1); |
87944f33 | 77 | udelay(10); |
779c545d | 78 | gpio_set_value(GPIO_PCMCIA_RESET, 0); |
87944f33 MR |
79 | } |
80 | break; | |
81 | } | |
82 | ||
87944f33 MR |
83 | return 0; |
84 | } | |
85 | ||
86 | static void cmx270_pcmcia_socket_init(struct soc_pcmcia_socket *skt) | |
87 | { | |
88 | } | |
89 | ||
90 | static void cmx270_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt) | |
91 | { | |
92 | } | |
93 | ||
94 | ||
4e5e8de0 | 95 | static struct pcmcia_low_level cmx270_pcmcia_ops __initdata = { |
87944f33 MR |
96 | .owner = THIS_MODULE, |
97 | .hw_init = cmx270_pcmcia_hw_init, | |
98 | .hw_shutdown = cmx270_pcmcia_shutdown, | |
99 | .socket_state = cmx270_pcmcia_socket_state, | |
100 | .configure_socket = cmx270_pcmcia_configure_socket, | |
101 | .socket_init = cmx270_pcmcia_socket_init, | |
102 | .socket_suspend = cmx270_pcmcia_socket_suspend, | |
779c545d | 103 | .nr = 1, |
87944f33 MR |
104 | }; |
105 | ||
106 | static struct platform_device *cmx270_pcmcia_device; | |
107 | ||
8616e2fb | 108 | int __init cmx270_pcmcia_init(void) |
87944f33 MR |
109 | { |
110 | int ret; | |
111 | ||
112 | cmx270_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1); | |
113 | ||
114 | if (!cmx270_pcmcia_device) | |
115 | return -ENOMEM; | |
116 | ||
4e5e8de0 RK |
117 | ret = platform_device_add_data(cmx270_pcmcia_device, &cmx270_pcmcia_ops, |
118 | sizeof(cmx270_pcmcia_ops)); | |
87944f33 | 119 | |
4e5e8de0 RK |
120 | if (ret == 0) { |
121 | printk(KERN_INFO "Registering cm-x270 PCMCIA interface.\n"); | |
122 | ret = platform_device_add(cmx270_pcmcia_device); | |
123 | } | |
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124 | |
125 | if (ret) | |
126 | platform_device_put(cmx270_pcmcia_device); | |
127 | ||
128 | return ret; | |
129 | } | |
130 | ||
8616e2fb | 131 | void __exit cmx270_pcmcia_exit(void) |
87944f33 MR |
132 | { |
133 | platform_device_unregister(cmx270_pcmcia_device); | |
134 | } |