[PATCH RFC] arm: omap3evm: Add support for an MT9M032 based camera board.

Martin Hostettler martin at neutronstar.dyndns.org
Tue Jan 18 17:32:16 EST 2011


Adds board support for an MT9M032 based camera to omap3evm.

Sigend-off-by: Martin Hostettler <martin at neutronstar.dyndns.org>
---
 arch/arm/mach-omap2/Makefile                |    1 +
 arch/arm/mach-omap2/board-omap3evm-camera.c |  177 +++++++++++++++++++++++++++
 2 files changed, 178 insertions(+), 0 deletions(-)
 create mode 100644 arch/arm/mach-omap2/board-omap3evm-camera.c

This patch depends on the recent not yet mainline media controller framework
and omap3-isp driver availible at git.linuxtv.org/pinchartl/media.git.

diff --git a/arch/arm/mach-omap2/Makefile b/arch/arm/mach-omap2/Makefile
index 60e51bc..5f43cc5 100644
--- a/arch/arm/mach-omap2/Makefile
+++ b/arch/arm/mach-omap2/Makefile
@@ -132,6 +132,7 @@ obj-$(CONFIG_MACH_OMAP3_TORPEDO)        += board-omap3logic.o \
 obj-$(CONFIG_MACH_OVERO)		+= board-overo.o \
 					   hsmmc.o
 obj-$(CONFIG_MACH_OMAP3EVM)		+= board-omap3evm.o \
+					   board-omap3evm-camera.o \
 					   hsmmc.o
 obj-$(CONFIG_MACH_OMAP3_PANDORA)	+= board-omap3pandora.o \
 					   hsmmc.o
diff --git a/arch/arm/mach-omap2/board-omap3evm-camera.c b/arch/arm/mach-omap2/board-omap3evm-camera.c
new file mode 100644
index 0000000..ea82a49
--- /dev/null
+++ b/arch/arm/mach-omap2/board-omap3evm-camera.c
@@ -0,0 +1,177 @@
+/*
+ * Copyright (C) 2010-2011 Lund Engineering
+ * Contact: Gil Lund <gwlund at lundeng.com>
+ * Author: Martin Hostettler <martin at neutronstar.dyndns.org>
+ *
+ * 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.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+ * 02110-1301 USA
+ */
+
+#include <linux/i2c.h>
+#include <linux/init.h>
+#include <linux/platform_device.h>
+
+#include <asm/gpio.h>
+#include <plat/mux.h>
+#include "mux.h"
+
+#include "../../../drivers/media/video/isp/isp.h"
+#include "../../../drivers/media/video/mt9m032.h"
+
+#include "devices.h"
+
+#define EVM_TWL_GPIO_BASE OMAP_MAX_GPIO_LINES
+#define GPIO98_VID_DEC_RES	98
+#define nCAM_VD_SEL		157
+
+#define MT9M032_I2C_BUS_NUM	2
+
+
+enum omap3evmdc_mux {
+	MUX_TVP5146,
+	MUX_CAMERA_SENSOR,
+	MUX_EXP_CAMERA_SENSOR,
+};
+
+/**
+ * omap3evm_set_mux - Sets mux to enable signal routing to
+ *                           different peripherals present on new EVM board
+ * @mux_id: enum, mux id to enable
+ *
+ * Returns 0 for success or a negative error code
+ */
+static int omap3evm_set_mux(enum omap3evmdc_mux mux_id)
+{
+	/* Set GPIO6 = 1 */
+	gpio_set_value_cansleep(EVM_TWL_GPIO_BASE + 6, 1);
+	gpio_set_value_cansleep(EVM_TWL_GPIO_BASE + 2, 0);
+
+	switch (mux_id) {
+	case MUX_TVP5146:
+		gpio_set_value_cansleep(EVM_TWL_GPIO_BASE + 2, 0);
+		gpio_set_value(nCAM_VD_SEL, 1);
+		break;
+
+	case MUX_CAMERA_SENSOR:
+		gpio_set_value_cansleep(EVM_TWL_GPIO_BASE + 2, 0);
+		gpio_set_value(nCAM_VD_SEL, 0);
+		break;
+
+	case MUX_EXP_CAMERA_SENSOR:
+		gpio_set_value_cansleep(EVM_TWL_GPIO_BASE + 2, 1);
+		break;
+
+	default:
+		pr_err("omap3evm-camera: Invalid mux id #%d\n", mux_id);
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static struct mt9m032_platform_data mt9m032_platform_data = {
+	.ext_clock = 13500000,
+	.pll_pre_div = 6,
+	.pll_mul = 120,
+	.pll_out_div = 5,
+	.invert_pixclock = 1,
+};
+
+static struct i2c_board_info camera_i2c_devices[] = {
+	{
+		I2C_BOARD_INFO(MT9M032_NAME, MT9M032_I2C_ADDR),
+		.platform_data = &mt9m032_platform_data,
+	},
+};
+
+static struct isp_subdev_i2c_board_info camera_i2c_subdevs[] = {
+	{
+		.board_info = &camera_i2c_devices[0],
+		.i2c_adapter_id = MT9M032_I2C_BUS_NUM,
+	},
+	{},
+};
+
+static struct isp_v4l2_subdevs_group camera_subdevs[] = {
+	{
+		.subdevs = camera_i2c_subdevs,
+		.interface = ISP_INTERFACE_PARALLEL,
+		.bus = {
+			.parallel = {
+				.data_lane_shift = 1,
+				.clk_pol = 0,
+				.bridge = ISPCTRL_PAR_BRIDGE_DISABLE,
+				.width = 8,
+			}
+		},
+	},
+	{},
+};
+
+static struct isp_platform_data isp_platform_data = {
+	.subdevs = camera_subdevs,
+};
+
+static int __init camera_init(void)
+{
+	omap_mux_init_gpio(nCAM_VD_SEL, OMAP_PIN_OUTPUT);
+	if (gpio_request(nCAM_VD_SEL, "nCAM_VD_SEL") < 0) {
+		pr_err("omap3evm-camera: Failed to get GPIO nCAM_VD_SEL(%d)\n",
+		       nCAM_VD_SEL);
+		goto err;
+	}
+	if (gpio_direction_output(nCAM_VD_SEL, 1) < 0) {
+		pr_err("omap3evm-camera: Failed to set GPIO nCAM_VD_SEL(%d) direction\n",
+		       nCAM_VD_SEL);
+		goto err_vdsel;
+	}
+
+	if (gpio_request(EVM_TWL_GPIO_BASE + 2, "T2_GPIO2") < 0) {
+		pr_err("omap3evm-camera: Failed to get GPIO T2_GPIO2(%d)\n",
+		       EVM_TWL_GPIO_BASE + 2);
+		goto err_vdsel;
+	}
+	if (gpio_direction_output(EVM_TWL_GPIO_BASE + 2, 0) < 0) {
+		pr_err("omap3evm-camera: Failed to set GPIO T2_GPIO2(%d) direction\n",
+		       EVM_TWL_GPIO_BASE + 2);
+		goto err_2;
+	}
+
+	if (gpio_request(EVM_TWL_GPIO_BASE + 8, "nCAM_VD_EN") < 0) {
+		pr_err("omap3evm-camera: Failed to get GPIO nCAM_VD_EN(%d)\n",
+		       EVM_TWL_GPIO_BASE + 8);
+		goto err_2;
+	}
+	if (gpio_direction_output(EVM_TWL_GPIO_BASE + 8, 0) < 0) {
+		pr_err("omap3evm-camera: Failed to set GPIO nCAM_VD_EN(%d) direction\n",
+		       EVM_TWL_GPIO_BASE + 8);
+		goto err_8;
+	}
+
+	omap3evm_set_mux(MUX_CAMERA_SENSOR);
+
+	
+	return omap3_init_camera(&isp_platform_data);
+
+err_8:
+	gpio_free(EVM_TWL_GPIO_BASE + 8);
+err_2:
+	gpio_free(EVM_TWL_GPIO_BASE + 2);
+err_vdsel:
+	gpio_free(nCAM_VD_SEL);
+err:
+	return -EINVAL;
+}
+
+device_initcall(camera_init);
-- 
1.7.1




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