projects / linux-2.6-block.git / blame
| Commit | Line | Data |
|---|---|---|
| e51d5486 SN |
1 | /* |
| 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 | ||
| 19 | static 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 | ||
| 31 | int 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 | ||
| 59 | void 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 | } |