[RFC,v3,2/2] Add platform code to support mt9p031 (LI-5M03 module) in Beagleboard xM.

Commit Message

Javier Martin May 26, 2011, 7:20 a.m. UTC

This patch is not ready to be submitted to mainline since it still
has some issues (code belonging to mt9p031 must be moved to a separate
file, etc...). However it is useful for you to test mt9p031 sensor
driver in kernel 2.6.39 (commit 61c4f2c81c61f73549928dfd9f3e8f26aa36a8cf).

Signed-off-by: Javier Martin <[e-mail]>
---
 arch/arm/mach-omap2/board-omap3beagle.c |  121 +++++++++++++++++++++++++++++++
 1 files changed, 121 insertions(+), 0 deletions(-)

Patch

diff --git a/arch/arm/mach-omap2/board-omap3beagle.c b/arch/arm/mach-omap2/board-omap3beagle.c
index 33007fd..3b55666 100644
--- a/arch/arm/mach-omap2/board-omap3beagle.c
+++ b/arch/arm/mach-omap2/board-omap3beagle.c
@@ -24,15 +24,21 @@ 
 #include <linux/input.h>
 #include <linux/gpio_keys.h>
 #include <linux/opp.h>
+#include <linux/i2c.h>
+#include <linux/mm.h>
+#include <linux/videodev2.h>
 
 #include <linux/mtd/mtd.h>
 #include <linux/mtd/partitions.h>
 #include <linux/mtd/nand.h>
 #include <linux/mmc/host.h>
 
+#include <linux/gpio.h>
 #include <linux/regulator/machine.h>
 #include <linux/i2c/twl.h>
 
+#include <media/mt9p031.h>
+
 #include <mach/hardware.h>
 #include <asm/mach-types.h>
 #include <asm/mach/arch.h>
@@ -47,12 +53,17 @@ 
 #include <plat/nand.h>
 #include <plat/usb.h>
 #include <plat/omap_device.h>
+#include <plat/i2c.h>
 
 #include "mux.h"
 #include "hsmmc.h"
 #include "timer-gp.h"
 #include "pm.h"
+#include "devices.h"
+#include "../../../drivers/media/video/omap3isp/isp.h"
 
+#define MT9P031_RESET_GPIO	98
+#define MT9P031_XCLK		ISP_XCLK_A
 #define NAND_BLOCK_SIZE		SZ_128K
 
 /*
@@ -273,6 +284,44 @@  static struct regulator_consumer_supply beagle_vsim_supply = {
 
 static struct gpio_led gpio_leds[];
 
+static struct regulator_consumer_supply beagle_vaux3_supply = {
+	.supply         = "cam_1v8",
+};
+
+static struct regulator_consumer_supply beagle_vaux4_supply = {
+	.supply         = "cam_2v8",
+};
+
+/* VAUX3 for CAM_1V8 */
+static struct regulator_init_data beagle_vaux3 = {
+	.constraints = {
+		.min_uV			= 1800000,
+		.max_uV			= 1800000,
+		.apply_uV		= true,
+		.valid_modes_mask	= REGULATOR_MODE_NORMAL
+					| REGULATOR_MODE_STANDBY,
+		.valid_ops_mask		= REGULATOR_CHANGE_MODE
+					| REGULATOR_CHANGE_STATUS,
+	},
+	.num_consumer_supplies		= 1,
+	.consumer_supplies		= &beagle_vaux3_supply,
+};
+
+/* VAUX4 for CAM_2V8 */
+static struct regulator_init_data beagle_vaux4 = {
+	.constraints = {
+		.min_uV			= 1800000,
+		.max_uV			= 1800000,
+		.apply_uV		= true,
+		.valid_modes_mask	= REGULATOR_MODE_NORMAL
+					| REGULATOR_MODE_STANDBY,
+		.valid_ops_mask		= REGULATOR_CHANGE_MODE
+					| REGULATOR_CHANGE_STATUS,
+	},
+	.num_consumer_supplies  = 1,
+	.consumer_supplies      = &beagle_vaux4_supply,
+};
+
 static int beagle_twl_gpio_setup(struct device *dev,
 		unsigned gpio, unsigned ngpio)
 {
@@ -309,6 +358,15 @@  static int beagle_twl_gpio_setup(struct device *dev,
 			pr_err("%s: unable to configure EHCI_nOC\n", __func__);
 	}
 
+	if (omap3_beagle_get_rev() == OMAP3BEAGLE_BOARD_XM) {
+		/*
+		 * Power on camera interface - only on pre-production, not
+		 * needed on production boards
+		 */
+		gpio_request(gpio + 2, "CAM_EN");
+		gpio_direction_output(gpio + 2, 1);
+	}
+
 	/*
 	 * TWL4030_GPIO_MAX + 0 == ledA, EHCI nEN_USB_PWR (out, XM active
 	 * high / others active low)
@@ -451,6 +509,8 @@  static struct twl4030_platform_data beagle_twldata = {
 	.vsim		= &beagle_vsim,
 	.vdac		= &beagle_vdac,
 	.vpll2		= &beagle_vpll2,
+	.vaux3          = &beagle_vaux3,
+	.vaux4          = &beagle_vaux4,
 };
 
 static struct i2c_board_info __initdata beagle_i2c_boardinfo[] = {
@@ -472,6 +532,7 @@  static int __init omap3_beagle_i2c_init(void)
 {
 	omap_register_i2c_bus(1, 2600, beagle_i2c_boardinfo,
 			ARRAY_SIZE(beagle_i2c_boardinfo));
+	omap_register_i2c_bus(2, 100, NULL, 0); /* Enable I2C2 for camera */
 	/* Bus 3 is attached to the DVI port where devices like the pico DLP
 	 * projector don't work reliably with 400kHz */
 	omap_register_i2c_bus(3, 100, beagle_i2c_eeprom, ARRAY_SIZE(beagle_i2c_eeprom));
@@ -654,6 +715,61 @@  static void __init beagle_opp_init(void)
 	return;
 }
 
+static int beagle_cam_set_xclk(struct v4l2_subdev *subdev, int hz)
+{
+	struct isp_device *isp = v4l2_dev_to_isp_device(subdev->v4l2_dev);
+	int ret;
+
+	ret = isp->platform_cb.set_xclk(isp, hz, MT9P031_XCLK);
+	return 0;
+}
+
+static int beagle_cam_reset(struct v4l2_subdev *subdev, int active)
+{
+	/* Set RESET_BAR to !active */
+	gpio_set_value(MT9P031_RESET_GPIO, !active);
+
+	return 0;
+}
+
+static struct mt9p031_platform_data beagle_mt9p031_platform_data = {
+	.set_xclk               = beagle_cam_set_xclk,
+	.reset                  = beagle_cam_reset,
+};
+
+static struct i2c_board_info mt9p031_camera_i2c_device = {
+	I2C_BOARD_INFO("mt9p031", 0x48),
+	.platform_data = &beagle_mt9p031_platform_data,
+};
+
+static struct isp_subdev_i2c_board_info mt9p031_camera_subdevs[] = {
+	{
+		.board_info = &mt9p031_camera_i2c_device,
+		.i2c_adapter_id = 2,
+	},
+	{ NULL, 0, },
+};
+
+static struct isp_v4l2_subdevs_group beagle_camera_subdevs[] = {
+	{
+		.subdevs = mt9p031_camera_subdevs,
+		.interface = ISP_INTERFACE_PARALLEL,
+		.bus = {
+				.parallel = {
+					.data_lane_shift = 0,
+					.clk_pol = 1,
+					.bridge = ISPCTRL_PAR_BRIDGE_DISABLE,
+				}
+		},
+	},
+	{ },
+};
+
+static struct isp_platform_data beagle_isp_platform_data = {
+	.subdevs = beagle_camera_subdevs,
+};
+
+
 static void __init omap3_beagle_init(void)
 {
 	omap3_mux_init(board_mux, OMAP_PACKAGE_CBB);
@@ -679,6 +795,11 @@  static void __init omap3_beagle_init(void)
 
 	beagle_display_init();
 	beagle_opp_init();
+
+	/* Enable camera */
+	gpio_request(MT9P031_RESET_GPIO, "cam_rst");
+	gpio_direction_output(MT9P031_RESET_GPIO, 0);
+	omap3_init_camera(&beagle_isp_platform_data);
 }
 
 MACHINE_START(OMAP3_BEAGLE, "OMAP3 Beagle Board")