CHROMIUM: Board file changes for Tegra camera

arch/arm/mach-tegra/board-aebl-sensors.c

Index: arch/arm/mach-tegra/board-aebl-sensors.c
diff --git a/arch/arm/mach-tegra/board-aebl-sensors.c b/arch/arm/mach-tegra/board-aebl-sensors.c
new file mode 100644
index 0000000000000000000000000000000000000000..ca0b414e277f0927cc5f35b72dd6b7688120f00e
--- /dev/null
+++ b/arch/arm/mach-tegra/board-aebl-sensors.c
@@ -0,0 +1,190 @@
+/*
+ * Copyright (C) 2011 NVIDIA Corporation.
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * 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.
+ *
+ */
+
+#include <linux/delay.h>
+#include <linux/i2c.h>
+#include <linux/clk.h>
+#include <linux/regulator/consumer.h>
+#include <linux/platform_device.h>
+#include <linux/dma-mapping.h>
+
+#include <media/soc_camera.h>
+#include <media/tegra_v4l2_camera.h>
+
+#include <mach/gpio.h>
+#include <mach/iomap.h>
+#include <mach/nvhost.h>
+
+#include "gpio-names.h"
+#include "devices.h"
+
+/* I2C adapter ID for the camera board. */
+#define TEGRA_CAMERA_I2C_ADAPTER_ID	3
+
+/* GPIOs relevant to camera module. */
+#define TEGRA_CAMERA_GPIO_CAM_PWR_EN	TEGRA_GPIO_PV4
+#define TEGRA_CAMERA_GPIO_CAM_RST	TEGRA_GPIO_PU2
+#define TEGRA_CAMERA_GPIO_CAM_PWDN	TEGRA_GPIO_PU3
+
+static struct regulator *regulator;
+static struct clk *clk_vi;
+static struct clk *clk_vi_sensor;
+static struct clk *clk_csi;
+static struct clk *clk_isp;
+static struct clk *clk_csus;
+
+static int tegra_camera_enable(struct nvhost_device *ndev)
+{
+	int err;
+
+	/* Turn on relevant clocks. */
+	clk_enable(clk_vi);
+	clk_enable(clk_vi_sensor);
+	clk_enable(clk_csi);
+	clk_enable(clk_isp);
+	clk_enable(clk_csus);
+
+	/* Turn on power to the camera board. */
+	regulator = regulator_get(&ndev->dev, "vddio_vi");
+	if (IS_ERR(regulator)) {
+		dev_info(&ndev->dev, "regulator_get() returned error %ld\n",
+			 PTR_ERR(regulator));
+		err = PTR_ERR(regulator);
+		goto exit;
+	}
+
+	err = regulator_enable(regulator);
+	if (err != 0)
+		goto exit_regulator_put;
+
+	/* Set up GPIOs. */
+	gpio_set_value(TEGRA_CAMERA_GPIO_CAM_PWR_EN, 1);
+	gpio_set_value(TEGRA_CAMERA_GPIO_CAM_RST, 1);
+	gpio_set_value(TEGRA_CAMERA_GPIO_CAM_PWDN, 0);
+
+	/* Give the sensor time to come out of reset.  The OV9740 needs
+	   8192 clock cycles (from vi_sensor clock) before the first I2C
+	   transaction. */
+	udelay(1000);
+
+	return 0;
+
+/*exit_regulator_disable:*/
+/*	regulator_disable(regulator);*/

[Olof Johansson, 2011/03/28 22:41:44]

Shouldn't this just be removed?

+exit_regulator_put:
+	regulator_put(regulator);
+exit:
+	return err;
+}
+
+static void tegra_camera_disable(struct nvhost_device *ndev)
+{
+	gpio_set_value(TEGRA_CAMERA_GPIO_CAM_PWDN, 1);
+	gpio_set_value(TEGRA_CAMERA_GPIO_CAM_RST, 0);
+	gpio_set_value(TEGRA_CAMERA_GPIO_CAM_PWR_EN, 0);
+
+	BUG_ON(!regulator);
+	regulator_disable(regulator);
+	regulator_put(regulator);
+	regulator = NULL;
+
+	/* Turn off relevant clocks. */
+	clk_disable(clk_vi);
+	clk_disable(clk_vi_sensor);
+	clk_disable(clk_csi);
+	clk_disable(clk_isp);
+	clk_disable(clk_csus);
+}
+
+static struct i2c_board_info aebl_i2c_bus3_sensor_info = {
+	I2C_BOARD_INFO("mt9m114", 0x48),
+};
+
+static struct soc_camera_link mt9m114_iclink = {
+	.bus_id		= 0,
+	.i2c_adapter_id	= TEGRA_CAMERA_I2C_ADAPTER_ID,
+	.board_info	= &aebl_i2c_bus3_sensor_info,
+	.module_name	= "mt9m114",
+};
+
+static struct platform_device soc_camera = {
+	.name	= "soc-camera-pdrv",
+	.id	= 0,
+	.dev	= {
+		.platform_data = &mt9m114_iclink,
+	},
+};
+
+static struct tegra_camera_platform_data tegra_camera_platform_data = {
+	.enable_camera		= tegra_camera_enable,
+	.disable_camera		= tegra_camera_disable,
+	.flip_v			= 0,
+	.flip_h			= 0,
+};
+
+int __init aebl_sensors_init(void)
+{
+	int err;
+
+	tegra_camera_device.dev.platform_data = &tegra_camera_platform_data;
+
+	tegra_gpio_enable(TEGRA_CAMERA_GPIO_CAM_PWR_EN);
+	err = gpio_request(TEGRA_CAMERA_GPIO_CAM_PWR_EN, "cam_pwr_en");
+	if (err != 0)
+		goto exit;
+	err = gpio_direction_output(TEGRA_CAMERA_GPIO_CAM_PWR_EN, 0);
+	if (err != 0)
+		goto exit_free_gpio_cam_pwr_en;
+
+	tegra_gpio_enable(TEGRA_CAMERA_GPIO_CAM_RST);
+	err = gpio_request(TEGRA_CAMERA_GPIO_CAM_RST, "cam_rst");
+	if (err != 0)
+		goto exit_free_gpio_cam_pwr_en;
+	err = gpio_direction_output(TEGRA_CAMERA_GPIO_CAM_RST, 0);
+	if (err != 0)
+		goto exit_free_gpio_cam_rst;
+
+	tegra_gpio_enable(TEGRA_CAMERA_GPIO_CAM_PWDN);
+	err = gpio_request(TEGRA_CAMERA_GPIO_CAM_PWDN, "cam_pwdn");
+	if (err != 0)
+		goto exit_free_gpio_cam_rst;
+	err = gpio_direction_output(TEGRA_CAMERA_GPIO_CAM_PWDN, 0);
+	if (err != 0)
+		goto exit_free_gpio_cam_pwdn;
+
+	clk_vi = clk_get_sys("tegra_camera", "vi");
+	clk_vi_sensor = clk_get_sys("tegra_camera", "vi_sensor");
+	clk_csi = clk_get_sys("tegra_camera", "csi");
+	clk_isp = clk_get_sys("tegra_camera", "isp");
+	clk_csus = clk_get_sys("tegra_camera", "csus");
+
+	clk_set_rate(clk_vi_sensor, 24000000);
+
+	nvhost_device_register(&tegra_camera_device);
+
+	platform_device_register(&soc_camera);
+
+	return 0;
+
+exit_free_gpio_cam_pwdn:
+	gpio_free(TEGRA_CAMERA_GPIO_CAM_PWDN);
+exit_free_gpio_cam_rst:
+	gpio_free(TEGRA_CAMERA_GPIO_CAM_RST);
+exit_free_gpio_cam_pwr_en:
+	gpio_free(TEGRA_CAMERA_GPIO_CAM_PWR_EN);
+exit:
+	BUG_ON(1);
+	return err;
+}
+