[PATCH v3] arm: omap3evm: Add support for an MT9M032 based camera board.
Martin Hostettler
martin at neutronstar.dyndns.org
Tue Dec 13 20:25:34 EST 2011
Adds board support for an MT9M032 based camera to omap3evm.
Signed-off-by: Martin Hostettler <martin at neutronstar.dyndns.org>
---
arch/arm/mach-omap2/Makefile | 3 +-
arch/arm/mach-omap2/board-omap3evm-camera.c | 155 +++++++++++++++++++++++++++
arch/arm/mach-omap2/board-omap3evm.c | 4 +
3 files changed, 161 insertions(+), 1 deletions(-)
create mode 100644 arch/arm/mach-omap2/board-omap3evm-camera.c
Changes in V3
* Added missing copyright and attribution.
* switched to gpio_request_array for gpio init.
* removed device_initcall and added call to omap3_evm_camera_init into omap3_evm_init
Changes in V2:
* ported to current mainline
* Style fixes
* Fix error handling
diff --git a/arch/arm/mach-omap2/Makefile b/arch/arm/mach-omap2/Makefile
index b009f17..6045789 100644
--- a/arch/arm/mach-omap2/Makefile
+++ b/arch/arm/mach-omap2/Makefile
@@ -196,7 +196,8 @@ obj-$(CONFIG_MACH_OMAP3530_LV_SOM) += board-omap3logic.o
obj-$(CONFIG_MACH_OMAP3_TORPEDO) += board-omap3logic.o
obj-$(CONFIG_MACH_ENCORE) += board-omap3encore.o
obj-$(CONFIG_MACH_OVERO) += board-overo.o
-obj-$(CONFIG_MACH_OMAP3EVM) += board-omap3evm.o
+obj-$(CONFIG_MACH_OMAP3EVM) += board-omap3evm.o \
+ board-omap3evm-camera.o
obj-$(CONFIG_MACH_OMAP3_PANDORA) += board-omap3pandora.o
obj-$(CONFIG_MACH_OMAP_3430SDP) += board-3430sdp.o
obj-$(CONFIG_MACH_NOKIA_N8X0) += board-n8x0.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..bffd5b8
--- /dev/null
+++ b/arch/arm/mach-omap2/board-omap3evm-camera.c
@@ -0,0 +1,155 @@
+/*
+ * Copyright (C) 2011 Texas Instruments Inc
+ * Copyright (C) 2010-2011 Lund Engineering
+ * Contact: Gil Lund <gwlund at lundeng.com>
+ * Authors:
+ * Vaibhav Hiremath <hvaibhav at ti.com>
+ * Martin Hostettler <martin at neutronstar.dyndns.org>
+ *
+ * Board intregration for a MT9M032 camera connected to IMAGE_CONN and I2C Bus 2
+ *
+ * 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 <linux/gpio.h>
+#include <plat/mux.h>
+#include "mux.h"
+
+#include "../../../drivers/media/video/omap3isp/isp.h"
+#include "media/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,
+ }
+ },
+ },
+ {},
+};
+
+static struct isp_platform_data isp_platform_data = {
+ .subdevs = camera_subdevs,
+};
+
+
+static struct gpio setup_gpios[] = {
+ { nCAM_VD_SEL, GPIOF_OUT_INIT_HIGH, "nCAM_VD_SEL" },
+ { EVM_TWL_GPIO_BASE + 2, GPIOF_OUT_INIT_LOW, "T2_GPIO2" },
+ { EVM_TWL_GPIO_BASE + 8, GPIOF_OUT_INIT_LOW, "nCAM_VD_EN" },
+};
+
+
+int __init omap3_evm_camera_init(void)
+{
+ int ret = -EINVAL;
+
+ omap_mux_init_gpio(nCAM_VD_SEL, OMAP_PIN_OUTPUT);
+ ret = gpio_request_array(setup_gpios, ARRAY_SIZE(setup_gpios));
+ if (ret < 0) {
+ pr_err("omap3evm-camera: Failed to setup camera signal routing.\n");
+ return ret;
+ }
+ omap3evm_set_mux(MUX_CAMERA_SENSOR);
+ ret = omap3_init_camera(&isp_platform_data);
+ if (ret < 0) {
+ gpio_free_array(setup_gpios, ARRAY_SIZE(setup_gpios));
+ return ret;
+ }
+ return 0;
+}
diff --git a/arch/arm/mach-omap2/board-omap3evm.c b/arch/arm/mach-omap2/board-omap3evm.c
index ec00b2e..1b50539 100644
--- a/arch/arm/mach-omap2/board-omap3evm.c
+++ b/arch/arm/mach-omap2/board-omap3evm.c
@@ -617,6 +617,8 @@ static struct gpio omap3_evm_ehci_gpios[] __initdata = {
{ OMAP3_EVM_EHCI_SELECT, GPIOF_OUT_INIT_LOW, "select EHCI port" },
};
+int omap3_evm_camera_init(void);
+
static void __init omap3_evm_init(void)
{
omap3_evm_get_revision();
@@ -672,6 +674,8 @@ static void __init omap3_evm_init(void)
pr_err("error setting wl12xx data\n");
platform_device_register(&omap3evm_wlan_regulator);
#endif
+
+ omap3_evm_camera_init();
}
MACHINE_START(OMAP3EVM, "OMAP3 EVM")
--
1.7.2.5
More information about the linux-arm-kernel
mailing list