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8616e2fb MR |
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 | ||
18 | #include <asm/mach-types.h> | |
19 | #include <mach/pxa-regs.h> | |
20 | ||
21 | #include "soc_common.h" | |
22 | ||
23 | #define GPIO_PCMCIA_SKTSEL (54) | |
24 | #define GPIO_PCMCIA_S0_CD_VALID (16) | |
25 | #define GPIO_PCMCIA_S1_CD_VALID (17) | |
26 | #define GPIO_PCMCIA_S0_RDYINT (6) | |
27 | #define GPIO_PCMCIA_S1_RDYINT (8) | |
28 | #define GPIO_PCMCIA_RESET (9) | |
29 | ||
30 | #define PCMCIA_S0_CD_VALID IRQ_GPIO(GPIO_PCMCIA_S0_CD_VALID) | |
31 | #define PCMCIA_S1_CD_VALID IRQ_GPIO(GPIO_PCMCIA_S1_CD_VALID) | |
32 | #define PCMCIA_S0_RDYINT IRQ_GPIO(GPIO_PCMCIA_S0_RDYINT) | |
33 | #define PCMCIA_S1_RDYINT IRQ_GPIO(GPIO_PCMCIA_S1_RDYINT) | |
34 | ||
35 | ||
36 | static struct pcmcia_irqs irqs[] = { | |
37 | { 0, PCMCIA_S0_CD_VALID, "PCMCIA0 CD" }, | |
38 | { 1, PCMCIA_S1_CD_VALID, "PCMCIA1 CD" }, | |
39 | }; | |
40 | ||
41 | static int cmx255_pcmcia_hw_init(struct soc_pcmcia_socket *skt) | |
42 | { | |
43 | int ret = gpio_request(GPIO_PCMCIA_RESET, "PCCard reset"); | |
44 | if (ret) | |
45 | return ret; | |
46 | gpio_direction_output(GPIO_PCMCIA_RESET, 0); | |
47 | ||
48 | skt->irq = skt->nr == 0 ? PCMCIA_S0_RDYINT : PCMCIA_S1_RDYINT; | |
49 | ret = soc_pcmcia_request_irqs(skt, irqs, ARRAY_SIZE(irqs)); | |
50 | if (!ret) | |
51 | gpio_free(GPIO_PCMCIA_RESET); | |
52 | ||
53 | return ret; | |
54 | } | |
55 | ||
56 | static void cmx255_pcmcia_shutdown(struct soc_pcmcia_socket *skt) | |
57 | { | |
58 | soc_pcmcia_free_irqs(skt, irqs, ARRAY_SIZE(irqs)); | |
59 | gpio_free(GPIO_PCMCIA_RESET); | |
60 | } | |
61 | ||
62 | ||
63 | static void cmx255_pcmcia_socket_state(struct soc_pcmcia_socket *skt, | |
64 | struct pcmcia_state *state) | |
65 | { | |
66 | int cd = skt->nr ? GPIO_PCMCIA_S1_CD_VALID : GPIO_PCMCIA_S0_CD_VALID; | |
67 | int rdy = skt->nr ? GPIO_PCMCIA_S0_RDYINT : GPIO_PCMCIA_S1_RDYINT; | |
68 | ||
69 | state->detect = !gpio_get_value(cd); | |
70 | state->ready = !!gpio_get_value(rdy); | |
71 | state->bvd1 = 1; | |
72 | state->bvd2 = 1; | |
73 | state->vs_3v = 0; | |
74 | state->vs_Xv = 0; | |
75 | state->wrprot = 0; /* not available */ | |
76 | } | |
77 | ||
78 | ||
79 | static int cmx255_pcmcia_configure_socket(struct soc_pcmcia_socket *skt, | |
80 | const socket_state_t *state) | |
81 | { | |
82 | switch (skt->nr) { | |
83 | case 0: | |
84 | if (state->flags & SS_RESET) { | |
85 | gpio_set_value(GPIO_PCMCIA_SKTSEL, 0); | |
86 | udelay(1); | |
87 | gpio_set_value(GPIO_PCMCIA_RESET, 1); | |
88 | udelay(10); | |
89 | gpio_set_value(GPIO_PCMCIA_RESET, 0); | |
90 | } | |
91 | break; | |
92 | case 1: | |
93 | if (state->flags & SS_RESET) { | |
94 | gpio_set_value(GPIO_PCMCIA_SKTSEL, 1); | |
95 | udelay(1); | |
96 | gpio_set_value(GPIO_PCMCIA_RESET, 1); | |
97 | udelay(10); | |
98 | gpio_set_value(GPIO_PCMCIA_RESET, 0); | |
99 | } | |
100 | break; | |
101 | } | |
102 | ||
103 | return 0; | |
104 | } | |
105 | ||
106 | static void cmx255_pcmcia_socket_init(struct soc_pcmcia_socket *skt) | |
107 | { | |
108 | } | |
109 | ||
110 | static void cmx255_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt) | |
111 | { | |
112 | } | |
113 | ||
114 | ||
115 | static struct pcmcia_low_level cmx255_pcmcia_ops __initdata = { | |
116 | .owner = THIS_MODULE, | |
117 | .hw_init = cmx255_pcmcia_hw_init, | |
118 | .hw_shutdown = cmx255_pcmcia_shutdown, | |
119 | .socket_state = cmx255_pcmcia_socket_state, | |
120 | .configure_socket = cmx255_pcmcia_configure_socket, | |
121 | .socket_init = cmx255_pcmcia_socket_init, | |
122 | .socket_suspend = cmx255_pcmcia_socket_suspend, | |
123 | .nr = 1, | |
124 | }; | |
125 | ||
126 | static struct platform_device *cmx255_pcmcia_device; | |
127 | ||
128 | int __init cmx255_pcmcia_init(void) | |
129 | { | |
130 | int ret; | |
131 | ||
132 | cmx255_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1); | |
133 | ||
134 | if (!cmx255_pcmcia_device) | |
135 | return -ENOMEM; | |
136 | ||
137 | ret = platform_device_add_data(cmx255_pcmcia_device, &cmx255_pcmcia_ops, | |
138 | sizeof(cmx255_pcmcia_ops)); | |
139 | ||
140 | if (ret == 0) { | |
141 | printk(KERN_INFO "Registering cm-x255 PCMCIA interface.\n"); | |
142 | ret = platform_device_add(cmx255_pcmcia_device); | |
143 | } | |
144 | ||
145 | if (ret) | |
146 | platform_device_put(cmx255_pcmcia_device); | |
147 | ||
148 | return ret; | |
149 | } | |
150 | ||
151 | void __exit cmx255_pcmcia_exit(void) | |
152 | { | |
153 | platform_device_unregister(cmx255_pcmcia_device); | |
154 | } |