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ARM: mx27_3ds: Add camera support
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mx27_3ds has an OV2640 camera connected on i2c0.

Add support for it.

Tested through the following Gstreamer pipeline:

gst-launch -v v4l2src device=/dev/video0 ! video/x-raw-yuv,width=320,height=240,framerate=25/1 ! ffmpegcolorspace ! fbdevsink

Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
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Fabio Estevam authored and Sascha Hauer committed Feb 27, 2012
1 parent 932fe70 commit 4c11c28
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Showing 2 changed files with 109 additions and 0 deletions.
1 change: 1 addition & 0 deletions arch/arm/mach-imx/Kconfig
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Original file line number Diff line number Diff line change
Expand Up @@ -304,6 +304,7 @@ config MACH_MX27_3DS
select IMX_HAVE_PLATFORM_IMX_I2C
select IMX_HAVE_PLATFORM_IMX_KEYPAD
select IMX_HAVE_PLATFORM_IMX_UART
select IMX_HAVE_PLATFORM_MX2_CAMERA
select IMX_HAVE_PLATFORM_MXC_EHCI
select IMX_HAVE_PLATFORM_MXC_MMC
select IMX_HAVE_PLATFORM_SPI_IMX
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108 changes: 108 additions & 0 deletions arch/arm/mach-imx/mach-mx27_3ds.c
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Original file line number Diff line number Diff line change
Expand Up @@ -31,6 +31,8 @@
#include <linux/regulator/machine.h>
#include <linux/spi/l4f00242t03.h>

#include <media/soc_camera.h>

#include <asm/mach-types.h>
#include <asm/mach/arch.h>
#include <asm/mach/time.h>
Expand All @@ -52,6 +54,8 @@
#define SD1_CD IMX_GPIO_NR(2, 26)
#define LCD_RESET IMX_GPIO_NR(1, 3)
#define LCD_ENABLE IMX_GPIO_NR(1, 31)
#define CSI_PWRDWN IMX_GPIO_NR(4, 19)
#define CSI_RESET IMX_GPIO_NR(3, 6)

static const int mx27pdk_pins[] __initconst = {
/* UART1 */
Expand Down Expand Up @@ -141,6 +145,26 @@ static const int mx27pdk_pins[] __initconst = {
PA30_PF_CONTRAST,
LCD_ENABLE | GPIO_GPIO | GPIO_OUT,
LCD_RESET | GPIO_GPIO | GPIO_OUT,
/* CSI */
PB10_PF_CSI_D0,
PB11_PF_CSI_D1,
PB12_PF_CSI_D2,
PB13_PF_CSI_D3,
PB14_PF_CSI_D4,
PB15_PF_CSI_MCLK,
PB16_PF_CSI_PIXCLK,
PB17_PF_CSI_D5,
PB18_PF_CSI_D6,
PB19_PF_CSI_D7,
PB20_PF_CSI_VSYNC,
PB21_PF_CSI_HSYNC,
CSI_PWRDWN | GPIO_GPIO | GPIO_OUT,
CSI_RESET | GPIO_GPIO | GPIO_OUT,
};

static struct gpio mx27_3ds_camera_gpios[] = {
{ CSI_PWRDWN, GPIOF_OUT_INIT_HIGH, "camera-power" },
{ CSI_RESET, GPIOF_OUT_INIT_HIGH, "camera-reset" },
};

static const struct imxuart_platform_data uart_pdata __initconst = {
Expand Down Expand Up @@ -242,6 +266,7 @@ static struct regulator_init_data gpo_init = {

static struct regulator_consumer_supply vmmc1_consumers[] = {
REGULATOR_SUPPLY("vcore", "spi0.0"),
REGULATOR_SUPPLY("cmos_2v8", "soc-camera-pdrv.0"),
};

static struct regulator_init_data vmmc1_init = {
Expand Down Expand Up @@ -270,6 +295,22 @@ static struct regulator_init_data vgen_init = {
.consumer_supplies = vgen_consumers,
};

static struct regulator_consumer_supply vvib_consumers[] = {
REGULATOR_SUPPLY("cmos_vcore", "soc-camera-pdrv.0"),
};

static struct regulator_init_data vvib_init = {
.constraints = {
.min_uV = 1300000,
.max_uV = 1300000,
.apply_uV = 1,
.valid_ops_mask = REGULATOR_CHANGE_VOLTAGE |
REGULATOR_CHANGE_STATUS,
},
.num_consumer_supplies = ARRAY_SIZE(vvib_consumers),
.consumer_supplies = vvib_consumers,
};

static struct mc13xxx_regulator_init_data mx27_3ds_regulators[] = {
{
.id = MC13783_REG_VMMC1,
Expand All @@ -283,6 +324,9 @@ static struct mc13xxx_regulator_init_data mx27_3ds_regulators[] = {
}, {
.id = MC13783_REG_GPO3, /* Turn on 3.3V */
.init_data = &gpo_init,
}, {
.id = MC13783_REG_VVIB, /* Power OV2640 */
.init_data = &vvib_init,
},
};

Expand Down Expand Up @@ -311,6 +355,51 @@ static const struct spi_imx_master spi2_pdata __initconst = {
.num_chipselect = ARRAY_SIZE(spi2_chipselect),
};

static int mx27_3ds_camera_power(struct device *dev, int on)
{
/* enable or disable the camera */
pr_debug("%s: %s the camera\n", __func__, on ? "ENABLE" : "DISABLE");
gpio_set_value(CSI_PWRDWN, on ? 0 : 1);

if (!on)
goto out;

/* If enabled, give a reset impulse */
gpio_set_value(CSI_RESET, 0);
msleep(20);
gpio_set_value(CSI_RESET, 1);
msleep(100);

out:
return 0;
}

static struct i2c_board_info mx27_3ds_i2c_camera = {
I2C_BOARD_INFO("ov2640", 0x30),
};

static struct regulator_bulk_data mx27_3ds_camera_regs[] = {
{ .supply = "cmos_vcore" },
{ .supply = "cmos_2v8" },
};

static struct soc_camera_link iclink_ov2640 = {
.bus_id = 0,
.board_info = &mx27_3ds_i2c_camera,
.i2c_adapter_id = 0,
.power = mx27_3ds_camera_power,
.regulators = mx27_3ds_camera_regs,
.num_regulators = ARRAY_SIZE(mx27_3ds_camera_regs),
};

static struct platform_device mx27_3ds_ov2640 = {
.name = "soc-camera-pdrv",
.id = 0,
.dev = {
.platform_data = &iclink_ov2640,
},
};

static struct imx_fb_videomode mx27_3ds_modes[] = {
{ /* 480x640 @ 60 Hz */
.mode = {
Expand Down Expand Up @@ -367,12 +456,21 @@ static struct spi_board_info mx27_3ds_spi_devs[] __initdata = {
},
};

static struct platform_device *devices[] __initdata = {
&mx27_3ds_ov2640,
};

static const struct mx2_camera_platform_data mx27_3ds_cam_pdata __initconst = {
.clk = 26000000,
};

static const struct imxi2c_platform_data mx27_3ds_i2c0_data __initconst = {
.bitrate = 100000,
};

static void __init mx27pdk_init(void)
{
int ret;
imx27_soc_init();

mxc_gpio_setup_multiple_pins(mx27pdk_pins, ARRAY_SIZE(mx27pdk_pins),
Expand Down Expand Up @@ -404,7 +502,17 @@ static void __init mx27pdk_init(void)
if (mxc_expio_init(MX27_CS5_BASE_ADDR, EXPIO_PARENT_INT))
pr_warn("Init of the debugboard failed, all devices on the debugboard are unusable.\n");
imx27_add_imx_i2c(0, &mx27_3ds_i2c0_data);
platform_add_devices(devices, ARRAY_SIZE(devices));
imx27_add_imx_fb(&mx27_3ds_fb_data);

ret = gpio_request_array(mx27_3ds_camera_gpios,
ARRAY_SIZE(mx27_3ds_camera_gpios));
if (ret) {
pr_err("Failed to request camera gpios");
iclink_ov2640.power = NULL;
}

imx27_add_mx2_camera(&mx27_3ds_cam_pdata);
}

static void __init mx27pdk_timer_init(void)
Expand Down

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