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Sylwester Nawrockie51d5482012-11-22 14:29:18 +09001/*
2 * Copyright (C) 2012 Sylwester Nawrocki <sylvester.nawrocki@gmail.com>
3 *
4 * Helper functions for S3C24XX/S3C64XX SoC series CAMIF driver
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
9 */
10
11#include <linux/gpio.h>
12#include <plat/gpio-cfg.h>
13
14/* Number of camera port pins, without FIELD */
15#define S3C_CAMIF_NUM_GPIOS 13
16
17/* Default camera port configuration helpers. */
18
19static void camif_get_gpios(int *gpio_start, int *gpio_reset)
20{
21#ifdef CONFIG_ARCH_S3C24XX
22 *gpio_start = S3C2410_GPJ(0);
23 *gpio_reset = S3C2410_GPJ(12);
24#else
25 /* s3c64xx */
26 *gpio_start = S3C64XX_GPF(0);
27 *gpio_reset = S3C64XX_GPF(3);
28#endif
29}
30
31int s3c_camif_gpio_get(void)
32{
33 int gpio_start, gpio_reset;
34 int ret, i;
35
36 camif_get_gpios(&gpio_start, &gpio_reset);
37
38 for (i = 0; i < S3C_CAMIF_NUM_GPIOS; i++) {
39 int gpio = gpio_start + i;
40
41 if (gpio == gpio_reset)
42 continue;
43
44 ret = gpio_request(gpio, "camif");
45 if (!ret)
46 ret = s3c_gpio_cfgpin(gpio, S3C_GPIO_SFN(2));
47 if (ret) {
48 pr_err("failed to configure GPIO %d\n", gpio);
49 for (--i; i >= 0; i--)
50 gpio_free(gpio--);
51 return ret;
52 }
53 s3c_gpio_setpull(gpio, S3C_GPIO_PULL_NONE);
54 }
55
56 return 0;
57}
58
59void s3c_camif_gpio_put(void)
60{
61 int i, gpio_start, gpio_reset;
62
63 camif_get_gpios(&gpio_start, &gpio_reset);
64
65 for (i = 0; i < S3C_CAMIF_NUM_GPIOS; i++) {
66 int gpio = gpio_start + i;
67 if (gpio != gpio_reset)
68 gpio_free(gpio);
69 }
70}