diff options
Diffstat (limited to 'arch/arm/plat-samsung')
| -rw-r--r-- | arch/arm/plat-samsung/Kconfig | 5 | ||||
| -rw-r--r-- | arch/arm/plat-samsung/Makefile | 1 | ||||
| -rw-r--r-- | arch/arm/plat-samsung/setup-camif.c | 70 |
3 files changed, 76 insertions, 0 deletions
diff --git a/arch/arm/plat-samsung/Kconfig b/arch/arm/plat-samsung/Kconfig index 59401e1..95360e6 100644 --- a/arch/arm/plat-samsung/Kconfig +++ b/arch/arm/plat-samsung/Kconfig @@ -414,6 +414,11 @@ config S5P_SETUP_MIPIPHY help Compile in common setup code for MIPI-CSIS and MIPI-DSIM devices +config S3C_SETUP_CAMIF + bool + help + Compile in common setup code for S3C CAMIF devices + # DMA config S3C_DMA diff --git a/arch/arm/plat-samsung/Makefile b/arch/arm/plat-samsung/Makefile index 9e40e8d..3a7c64d 100644 --- a/arch/arm/plat-samsung/Makefile +++ b/arch/arm/plat-samsung/Makefile @@ -41,6 +41,7 @@ obj-$(CONFIG_S5P_DEV_UART) += s5p-dev-uart.o obj-$(CONFIG_SAMSUNG_DEV_BACKLIGHT) += dev-backlight.o +obj-$(CONFIG_S3C_SETUP_CAMIF) += setup-camif.o obj-$(CONFIG_S5P_SETUP_MIPIPHY) += setup-mipiphy.o # DMA support diff --git a/arch/arm/plat-samsung/setup-camif.c b/arch/arm/plat-samsung/setup-camif.c new file mode 100644 index 0000000..e01bf76 --- /dev/null +++ b/arch/arm/plat-samsung/setup-camif.c @@ -0,0 +1,70 @@ +/* + * Copyright (C) 2012 Sylwester Nawrocki <sylvester.nawrocki@gmail.com> + * + * Helper functions for S3C24XX/S3C64XX SoC series CAMIF driver + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#include <linux/gpio.h> +#include <plat/gpio-cfg.h> + +/* Number of camera port pins, without FIELD */ +#define S3C_CAMIF_NUM_GPIOS 13 + +/* Default camera port configuration helpers. */ + +static void camif_get_gpios(int *gpio_start, int *gpio_reset) +{ +#ifdef CONFIG_ARCH_S3C24XX + *gpio_start = S3C2410_GPJ(0); + *gpio_reset = S3C2410_GPJ(12); +#else + /* s3c64xx */ + *gpio_start = S3C64XX_GPF(0); + *gpio_reset = S3C64XX_GPF(3); +#endif +} + +int s3c_camif_gpio_get(void) +{ + int gpio_start, gpio_reset; + int ret, i; + + camif_get_gpios(&gpio_start, &gpio_reset); + + for (i = 0; i < S3C_CAMIF_NUM_GPIOS; i++) { + int gpio = gpio_start + i; + + if (gpio == gpio_reset) + continue; + + ret = gpio_request(gpio, "camif"); + if (!ret) + ret = s3c_gpio_cfgpin(gpio, S3C_GPIO_SFN(2)); + if (ret) { + pr_err("failed to configure GPIO %d\n", gpio); + for (--i; i >= 0; i--) + gpio_free(gpio--); + return ret; + } + s3c_gpio_setpull(gpio, S3C_GPIO_PULL_NONE); + } + + return 0; +} + +void s3c_camif_gpio_put(void) +{ + int i, gpio_start, gpio_reset; + + camif_get_gpios(&gpio_start, &gpio_reset); + + for (i = 0; i < S3C_CAMIF_NUM_GPIOS; i++) { + int gpio = gpio_start + i; + if (gpio != gpio_reset) + gpio_free(gpio); + } +} |