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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 | * | |
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_S0_CD_VALID (84) | |
22 | #define GPIO_PCMCIA_S0_RDYINT (82) | |
23 | #define GPIO_PCMCIA_RESET (53) | |
24 | ||
25 | static int cmx270_pcmcia_hw_init(struct soc_pcmcia_socket *skt) | |
26 | { | |
27 | int ret = gpio_request(GPIO_PCMCIA_RESET, "PCCard reset"); | |
28 | if (ret) | |
29 | return ret; | |
30 | gpio_direction_output(GPIO_PCMCIA_RESET, 0); | |
31 | ||
32 | skt->stat[SOC_STAT_CD].gpio = GPIO_PCMCIA_S0_CD_VALID; | |
33 | skt->stat[SOC_STAT_CD].name = "PCMCIA0 CD"; | |
34 | skt->stat[SOC_STAT_RDY].gpio = GPIO_PCMCIA_S0_RDYINT; | |
35 | skt->stat[SOC_STAT_RDY].name = "PCMCIA0 RDY"; | |
36 | ||
37 | return ret; | |
38 | } | |
39 | ||
40 | static void cmx270_pcmcia_shutdown(struct soc_pcmcia_socket *skt) | |
41 | { | |
42 | gpio_free(GPIO_PCMCIA_RESET); | |
43 | } | |
44 | ||
45 | ||
46 | static void cmx270_pcmcia_socket_state(struct soc_pcmcia_socket *skt, | |
47 | struct pcmcia_state *state) | |
48 | { | |
49 | state->vs_3v = 0; | |
50 | state->vs_Xv = 0; | |
51 | } | |
52 | ||
53 | ||
54 | static int cmx270_pcmcia_configure_socket(struct soc_pcmcia_socket *skt, | |
55 | const socket_state_t *state) | |
56 | { | |
57 | switch (skt->nr) { | |
58 | case 0: | |
59 | if (state->flags & SS_RESET) { | |
60 | gpio_set_value(GPIO_PCMCIA_RESET, 1); | |
61 | udelay(10); | |
62 | gpio_set_value(GPIO_PCMCIA_RESET, 0); | |
63 | } | |
64 | break; | |
65 | } | |
66 | ||
67 | return 0; | |
68 | } | |
69 | ||
70 | static struct pcmcia_low_level cmx270_pcmcia_ops __initdata = { | |
71 | .owner = THIS_MODULE, | |
72 | .hw_init = cmx270_pcmcia_hw_init, | |
73 | .hw_shutdown = cmx270_pcmcia_shutdown, | |
74 | .socket_state = cmx270_pcmcia_socket_state, | |
75 | .configure_socket = cmx270_pcmcia_configure_socket, | |
76 | .nr = 1, | |
77 | }; | |
78 | ||
79 | static struct platform_device *cmx270_pcmcia_device; | |
80 | ||
81 | int __init cmx270_pcmcia_init(void) | |
82 | { | |
83 | int ret; | |
84 | ||
85 | cmx270_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1); | |
86 | ||
87 | if (!cmx270_pcmcia_device) | |
88 | return -ENOMEM; | |
89 | ||
90 | ret = platform_device_add_data(cmx270_pcmcia_device, &cmx270_pcmcia_ops, | |
91 | sizeof(cmx270_pcmcia_ops)); | |
92 | ||
93 | if (ret == 0) { | |
94 | printk(KERN_INFO "Registering cm-x270 PCMCIA interface.\n"); | |
95 | ret = platform_device_add(cmx270_pcmcia_device); | |
96 | } | |
97 | ||
98 | if (ret) | |
99 | platform_device_put(cmx270_pcmcia_device); | |
100 | ||
101 | return ret; | |
102 | } | |
103 | ||
104 | void __exit cmx270_pcmcia_exit(void) | |
105 | { | |
106 | platform_device_unregister(cmx270_pcmcia_device); | |
107 | } |