RE: [PATCH v2] arm: omap3evm: Add support for an MT9M032 based camera board.

["Hiremath, Vaibhav" <hvaibhav@ti.com>]

> -----Original Message-----
> From: linux-omap-owner@vger.kernel.org [mailto:linux-omap-
> owner@vger.kernel.org] On Behalf Of Laurent Pinchart
> Sent: Monday, September 19, 2011 3:29 AM
> To: Martin Hostettler
> Cc: Tony Lindgren; linux-omap@vger.kernel.org; linux-
> media@vger.kernel.org; linux-arm-kernel@lists.infradead.org
> Subject: Re: [PATCH v2] arm: omap3evm: Add support for an MT9M032 based
> camera board.
> 
> Hi Martin,
> 
> On Saturday 17 September 2011 11:34:57 Martin Hostettler wrote:
> > Adds board support for an MT9M032 based camera to omap3evm.
> >
> > Sigend-off-by: Martin Hostettler <martin@neutronstar.dyndns.org>
> > ---
> >  arch/arm/mach-omap2/Makefile                |    1 +
> >  arch/arm/mach-omap2/board-omap3evm-camera.c |  183
> > +++++++++++++++++++++++++++ 2 files changed, 184 insertions(+), 0
> > deletions(-)
> >  create mode 100644 arch/arm/mach-omap2/board-omap3evm-camera.c
> >
> > 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 f343365..8ae3d25 100644
> > --- a/arch/arm/mach-omap2/Makefile
> > +++ b/arch/arm/mach-omap2/Makefile
> > @@ -202,6 +202,7 @@ 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..be987d9
> > --- /dev/null
> > +++ b/arch/arm/mach-omap2/board-omap3evm-camera.c
> > @@ -0,0 +1,183 @@
> > +/*
> > + * Copyright (C) 2010-2011 Lund Engineering
> > + * Contact: Gil Lund <gwlund@lundeng.com>
> > + * Author: Martin Hostettler <martin@neutronstar.dyndns.org>
> > + *
[Hiremath, Vaibhav] The file below seems copied from (which is coming from all older releases of TI)

http://arago-project.org/git/projects/?p=linux-omap3.git;a=blob;f=arch/arm/mach-omap2/board-omap3evm-camera.c;h=2e6ccfef69027dee880d507b98b5a7998d4bbe7e;hb=adcd067326836777c049e3cb32a5b7d9d401fc31

So I would appreciate if you keep original copyright and authorship of the file and add your sign-off to the patch.

Thanks,
Vaibhav

> > + * 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 int __init camera_init(void)
> > +{
> > +	int ret = -EINVAL;
> > +
> > +	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);
> > +
> > +
> > +	ret = omap3_init_camera(&isp_platform_data);
> > +	if (ret < 0)
> > +		goto err_8;
> > +	return 0;
> > +
> > +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 ret;
> > +}
> > +
> > +device_initcall(camera_init);
> 
> Please don't use device_initcall(), but call the function directly from
> the
> OMAP3 EVM init handler. Otherwise camera_init() will be called if OMAP3
> EVM
> support is compiled in the kernel, regardless of the board the kernel runs
> on.
> 
> --
> Regards,
> 
> Laurent Pinchart
> --
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