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f7234138f1
If a subdevice pad op is called from a bridge driver, then there is no v4l2_subdev_fh struct that can be passed to the subdevice. This made it hard to use such subdevs from a bridge driver. This patch replaces the v4l2_subdev_fh pointer by a v4l2_subdev_pad_config pointer in the pad ops. This allows bridge drivers to use the various try_ pad ops by creating a v4l2_subdev_pad_config struct and passing it along to the pad op. The v4l2_subdev_get_try_* macros had to be changed because of this, so I also took the opportunity to use the full name of the v4l2_subdev_get_try_* functions in the __V4L2_SUBDEV_MK_GET_TRY macro arguments: if you now do 'git grep v4l2_subdev_get_try_format' you will actually find the header where it is defined. One remark regarding the drivers/staging/media/davinci_vpfe patches: the *_init_formats() functions assumed that fh could be NULL. However, that's not true for this driver, it's always set. This is almost certainly a copy and paste from the omap3isp driver. I've updated the code to reflect the fact that fh is never NULL. Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com> Acked-by: Lad, Prabhakar <prabhakar.csengg@gmail.com> Tested-by: Lad, Prabhakar <prabhakar.csengg@gmail.com> Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Acked-by: Sakari Ailus <sakari.ailus@linux.intel.com> Acked-by: Sylwester Nawrocki <s.nawrocki@samsung.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
902 lines
25 KiB
C
902 lines
25 KiB
C
/*
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* Driver for MT9M032 CMOS Image Sensor from Micron
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*
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* Copyright (C) 2010-2011 Lund Engineering
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* Contact: Gil Lund <gwlund@lundeng.com>
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* Author: Martin Hostettler <martin@neutronstar.dyndns.org>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* version 2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
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* 02110-1301 USA
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*/
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#include <linux/delay.h>
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#include <linux/i2c.h>
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#include <linux/init.h>
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#include <linux/kernel.h>
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#include <linux/math64.h>
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#include <linux/module.h>
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#include <linux/mutex.h>
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#include <linux/slab.h>
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#include <linux/v4l2-mediabus.h>
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#include <media/media-entity.h>
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#include <media/mt9m032.h>
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#include <media/v4l2-ctrls.h>
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#include <media/v4l2-device.h>
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#include <media/v4l2-subdev.h>
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#include "aptina-pll.h"
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/*
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* width and height include active boundary and black parts
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*
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* column 0- 15 active boundary
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* column 16-1455 image
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* column 1456-1471 active boundary
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* column 1472-1599 black
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*
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* row 0- 51 black
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* row 53- 59 active boundary
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* row 60-1139 image
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* row 1140-1147 active boundary
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* row 1148-1151 black
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*/
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#define MT9M032_PIXEL_ARRAY_WIDTH 1600
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#define MT9M032_PIXEL_ARRAY_HEIGHT 1152
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#define MT9M032_CHIP_VERSION 0x00
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#define MT9M032_CHIP_VERSION_VALUE 0x1402
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#define MT9M032_ROW_START 0x01
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#define MT9M032_ROW_START_MIN 0
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#define MT9M032_ROW_START_MAX 1152
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#define MT9M032_ROW_START_DEF 60
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#define MT9M032_COLUMN_START 0x02
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#define MT9M032_COLUMN_START_MIN 0
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#define MT9M032_COLUMN_START_MAX 1600
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#define MT9M032_COLUMN_START_DEF 16
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#define MT9M032_ROW_SIZE 0x03
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#define MT9M032_ROW_SIZE_MIN 32
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#define MT9M032_ROW_SIZE_MAX 1152
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#define MT9M032_ROW_SIZE_DEF 1080
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#define MT9M032_COLUMN_SIZE 0x04
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#define MT9M032_COLUMN_SIZE_MIN 32
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#define MT9M032_COLUMN_SIZE_MAX 1600
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#define MT9M032_COLUMN_SIZE_DEF 1440
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#define MT9M032_HBLANK 0x05
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#define MT9M032_VBLANK 0x06
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#define MT9M032_VBLANK_MAX 0x7ff
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#define MT9M032_SHUTTER_WIDTH_HIGH 0x08
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#define MT9M032_SHUTTER_WIDTH_LOW 0x09
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#define MT9M032_SHUTTER_WIDTH_MIN 1
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#define MT9M032_SHUTTER_WIDTH_MAX 1048575
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#define MT9M032_SHUTTER_WIDTH_DEF 1943
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#define MT9M032_PIX_CLK_CTRL 0x0a
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#define MT9M032_PIX_CLK_CTRL_INV_PIXCLK 0x8000
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#define MT9M032_RESTART 0x0b
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#define MT9M032_RESET 0x0d
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#define MT9M032_PLL_CONFIG1 0x11
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#define MT9M032_PLL_CONFIG1_PREDIV_MASK 0x3f
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#define MT9M032_PLL_CONFIG1_MUL_SHIFT 8
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#define MT9M032_READ_MODE1 0x1e
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#define MT9M032_READ_MODE1_OUTPUT_BAD_FRAMES (1 << 13)
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#define MT9M032_READ_MODE1_MAINTAIN_FRAME_RATE (1 << 12)
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#define MT9M032_READ_MODE1_XOR_LINE_VALID (1 << 11)
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#define MT9M032_READ_MODE1_CONT_LINE_VALID (1 << 10)
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#define MT9M032_READ_MODE1_INVERT_TRIGGER (1 << 9)
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#define MT9M032_READ_MODE1_SNAPSHOT (1 << 8)
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#define MT9M032_READ_MODE1_GLOBAL_RESET (1 << 7)
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#define MT9M032_READ_MODE1_BULB_EXPOSURE (1 << 6)
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#define MT9M032_READ_MODE1_INVERT_STROBE (1 << 5)
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#define MT9M032_READ_MODE1_STROBE_ENABLE (1 << 4)
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#define MT9M032_READ_MODE1_STROBE_START_TRIG1 (0 << 2)
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#define MT9M032_READ_MODE1_STROBE_START_EXP (1 << 2)
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#define MT9M032_READ_MODE1_STROBE_START_SHUTTER (2 << 2)
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#define MT9M032_READ_MODE1_STROBE_START_TRIG2 (3 << 2)
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#define MT9M032_READ_MODE1_STROBE_END_TRIG1 (0 << 0)
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#define MT9M032_READ_MODE1_STROBE_END_EXP (1 << 0)
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#define MT9M032_READ_MODE1_STROBE_END_SHUTTER (2 << 0)
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#define MT9M032_READ_MODE1_STROBE_END_TRIG2 (3 << 0)
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#define MT9M032_READ_MODE2 0x20
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#define MT9M032_READ_MODE2_VFLIP_SHIFT 15
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#define MT9M032_READ_MODE2_HFLIP_SHIFT 14
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#define MT9M032_READ_MODE2_ROW_BLC 0x40
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#define MT9M032_GAIN_GREEN1 0x2b
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#define MT9M032_GAIN_BLUE 0x2c
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#define MT9M032_GAIN_RED 0x2d
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#define MT9M032_GAIN_GREEN2 0x2e
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/* write only */
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#define MT9M032_GAIN_ALL 0x35
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#define MT9M032_GAIN_DIGITAL_MASK 0x7f
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#define MT9M032_GAIN_DIGITAL_SHIFT 8
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#define MT9M032_GAIN_AMUL_SHIFT 6
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#define MT9M032_GAIN_ANALOG_MASK 0x3f
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#define MT9M032_FORMATTER1 0x9e
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#define MT9M032_FORMATTER1_PLL_P1_6 (1 << 8)
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#define MT9M032_FORMATTER1_PARALLEL (1 << 12)
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#define MT9M032_FORMATTER2 0x9f
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#define MT9M032_FORMATTER2_DOUT_EN 0x1000
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#define MT9M032_FORMATTER2_PIXCLK_EN 0x2000
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/*
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* The available MT9M032 datasheet is missing documentation for register 0x10
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* MT9P031 seems to be close enough, so use constants from that datasheet for
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* now.
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* But keep the name MT9P031 to remind us, that this isn't really confirmed
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* for this sensor.
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*/
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#define MT9P031_PLL_CONTROL 0x10
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#define MT9P031_PLL_CONTROL_PWROFF 0x0050
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#define MT9P031_PLL_CONTROL_PWRON 0x0051
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#define MT9P031_PLL_CONTROL_USEPLL 0x0052
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struct mt9m032 {
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struct v4l2_subdev subdev;
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struct media_pad pad;
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struct mt9m032_platform_data *pdata;
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unsigned int pix_clock;
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struct v4l2_ctrl_handler ctrls;
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struct {
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struct v4l2_ctrl *hflip;
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struct v4l2_ctrl *vflip;
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};
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struct mutex lock; /* Protects streaming, format, interval and crop */
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bool streaming;
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struct v4l2_mbus_framefmt format;
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struct v4l2_rect crop;
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struct v4l2_fract frame_interval;
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};
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#define to_mt9m032(sd) container_of(sd, struct mt9m032, subdev)
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#define to_dev(sensor) \
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(&((struct i2c_client *)v4l2_get_subdevdata(&(sensor)->subdev))->dev)
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static int mt9m032_read(struct i2c_client *client, u8 reg)
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{
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return i2c_smbus_read_word_swapped(client, reg);
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}
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static int mt9m032_write(struct i2c_client *client, u8 reg, const u16 data)
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{
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return i2c_smbus_write_word_swapped(client, reg, data);
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}
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static u32 mt9m032_row_time(struct mt9m032 *sensor, unsigned int width)
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{
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unsigned int effective_width;
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u32 ns;
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effective_width = width + 716; /* empirical value */
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ns = div_u64(1000000000ULL * effective_width, sensor->pix_clock);
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dev_dbg(to_dev(sensor), "MT9M032 line time: %u ns\n", ns);
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return ns;
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}
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static int mt9m032_update_timing(struct mt9m032 *sensor,
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struct v4l2_fract *interval)
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{
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struct i2c_client *client = v4l2_get_subdevdata(&sensor->subdev);
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struct v4l2_rect *crop = &sensor->crop;
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unsigned int min_vblank;
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unsigned int vblank;
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u32 row_time;
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if (!interval)
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interval = &sensor->frame_interval;
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row_time = mt9m032_row_time(sensor, crop->width);
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vblank = div_u64(1000000000ULL * interval->numerator,
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(u64)row_time * interval->denominator)
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- crop->height;
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if (vblank > MT9M032_VBLANK_MAX) {
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/* hardware limits to 11 bit values */
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interval->denominator = 1000;
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interval->numerator =
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div_u64((crop->height + MT9M032_VBLANK_MAX) *
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(u64)row_time * interval->denominator,
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1000000000ULL);
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vblank = div_u64(1000000000ULL * interval->numerator,
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(u64)row_time * interval->denominator)
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- crop->height;
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}
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/* enforce minimal 1.6ms blanking time. */
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min_vblank = 1600000 / row_time;
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vblank = clamp_t(unsigned int, vblank, min_vblank, MT9M032_VBLANK_MAX);
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return mt9m032_write(client, MT9M032_VBLANK, vblank);
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}
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static int mt9m032_update_geom_timing(struct mt9m032 *sensor)
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{
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struct i2c_client *client = v4l2_get_subdevdata(&sensor->subdev);
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int ret;
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ret = mt9m032_write(client, MT9M032_COLUMN_SIZE,
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sensor->crop.width - 1);
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if (!ret)
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ret = mt9m032_write(client, MT9M032_ROW_SIZE,
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sensor->crop.height - 1);
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if (!ret)
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ret = mt9m032_write(client, MT9M032_COLUMN_START,
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sensor->crop.left);
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if (!ret)
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ret = mt9m032_write(client, MT9M032_ROW_START,
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sensor->crop.top);
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if (!ret)
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ret = mt9m032_update_timing(sensor, NULL);
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return ret;
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}
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static int update_formatter2(struct mt9m032 *sensor, bool streaming)
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{
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struct i2c_client *client = v4l2_get_subdevdata(&sensor->subdev);
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u16 reg_val = MT9M032_FORMATTER2_DOUT_EN
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| 0x0070; /* parts reserved! */
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/* possibly for changing to 14-bit mode */
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if (streaming)
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reg_val |= MT9M032_FORMATTER2_PIXCLK_EN; /* pixclock enable */
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return mt9m032_write(client, MT9M032_FORMATTER2, reg_val);
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}
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static int mt9m032_setup_pll(struct mt9m032 *sensor)
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{
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static const struct aptina_pll_limits limits = {
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.ext_clock_min = 8000000,
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.ext_clock_max = 16500000,
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.int_clock_min = 2000000,
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.int_clock_max = 24000000,
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.out_clock_min = 322000000,
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.out_clock_max = 693000000,
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.pix_clock_max = 99000000,
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.n_min = 1,
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.n_max = 64,
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.m_min = 16,
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.m_max = 255,
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.p1_min = 6,
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.p1_max = 7,
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};
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struct i2c_client *client = v4l2_get_subdevdata(&sensor->subdev);
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struct mt9m032_platform_data *pdata = sensor->pdata;
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struct aptina_pll pll;
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u16 reg_val;
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int ret;
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pll.ext_clock = pdata->ext_clock;
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pll.pix_clock = pdata->pix_clock;
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ret = aptina_pll_calculate(&client->dev, &limits, &pll);
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if (ret < 0)
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return ret;
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sensor->pix_clock = pdata->pix_clock;
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ret = mt9m032_write(client, MT9M032_PLL_CONFIG1,
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(pll.m << MT9M032_PLL_CONFIG1_MUL_SHIFT) |
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((pll.n - 1) & MT9M032_PLL_CONFIG1_PREDIV_MASK));
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if (!ret)
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ret = mt9m032_write(client, MT9P031_PLL_CONTROL,
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MT9P031_PLL_CONTROL_PWRON |
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MT9P031_PLL_CONTROL_USEPLL);
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if (!ret) /* more reserved, Continuous, Master Mode */
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ret = mt9m032_write(client, MT9M032_READ_MODE1, 0x8000 |
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MT9M032_READ_MODE1_STROBE_START_EXP |
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MT9M032_READ_MODE1_STROBE_END_SHUTTER);
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if (!ret) {
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reg_val = (pll.p1 == 6 ? MT9M032_FORMATTER1_PLL_P1_6 : 0)
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| MT9M032_FORMATTER1_PARALLEL | 0x001e; /* 14-bit */
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ret = mt9m032_write(client, MT9M032_FORMATTER1, reg_val);
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}
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return ret;
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}
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/* -----------------------------------------------------------------------------
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* Subdev pad operations
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*/
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static int mt9m032_enum_mbus_code(struct v4l2_subdev *subdev,
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struct v4l2_subdev_pad_config *cfg,
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struct v4l2_subdev_mbus_code_enum *code)
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{
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if (code->index != 0)
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return -EINVAL;
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code->code = MEDIA_BUS_FMT_Y8_1X8;
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return 0;
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}
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static int mt9m032_enum_frame_size(struct v4l2_subdev *subdev,
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struct v4l2_subdev_pad_config *cfg,
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struct v4l2_subdev_frame_size_enum *fse)
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{
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if (fse->index != 0 || fse->code != MEDIA_BUS_FMT_Y8_1X8)
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return -EINVAL;
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fse->min_width = MT9M032_COLUMN_SIZE_DEF;
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fse->max_width = MT9M032_COLUMN_SIZE_DEF;
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fse->min_height = MT9M032_ROW_SIZE_DEF;
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fse->max_height = MT9M032_ROW_SIZE_DEF;
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return 0;
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}
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/**
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* __mt9m032_get_pad_crop() - get crop rect
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* @sensor: pointer to the sensor struct
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* @cfg: v4l2_subdev_pad_config for getting the try crop rect from
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* @which: select try or active crop rect
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*
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* Returns a pointer the current active or fh relative try crop rect
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*/
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static struct v4l2_rect *
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__mt9m032_get_pad_crop(struct mt9m032 *sensor, struct v4l2_subdev_pad_config *cfg,
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enum v4l2_subdev_format_whence which)
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{
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switch (which) {
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case V4L2_SUBDEV_FORMAT_TRY:
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return v4l2_subdev_get_try_crop(&sensor->subdev, cfg, 0);
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case V4L2_SUBDEV_FORMAT_ACTIVE:
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return &sensor->crop;
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default:
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return NULL;
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}
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}
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/**
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* __mt9m032_get_pad_format() - get format
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* @sensor: pointer to the sensor struct
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* @cfg: v4l2_subdev_pad_config for getting the try format from
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* @which: select try or active format
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*
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* Returns a pointer the current active or fh relative try format
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*/
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static struct v4l2_mbus_framefmt *
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__mt9m032_get_pad_format(struct mt9m032 *sensor, struct v4l2_subdev_pad_config *cfg,
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enum v4l2_subdev_format_whence which)
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{
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switch (which) {
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case V4L2_SUBDEV_FORMAT_TRY:
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return v4l2_subdev_get_try_format(&sensor->subdev, cfg, 0);
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case V4L2_SUBDEV_FORMAT_ACTIVE:
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return &sensor->format;
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default:
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return NULL;
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}
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}
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static int mt9m032_get_pad_format(struct v4l2_subdev *subdev,
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struct v4l2_subdev_pad_config *cfg,
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struct v4l2_subdev_format *fmt)
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{
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struct mt9m032 *sensor = to_mt9m032(subdev);
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mutex_lock(&sensor->lock);
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fmt->format = *__mt9m032_get_pad_format(sensor, cfg, fmt->which);
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mutex_unlock(&sensor->lock);
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return 0;
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}
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static int mt9m032_set_pad_format(struct v4l2_subdev *subdev,
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struct v4l2_subdev_pad_config *cfg,
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struct v4l2_subdev_format *fmt)
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{
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struct mt9m032 *sensor = to_mt9m032(subdev);
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int ret;
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mutex_lock(&sensor->lock);
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if (sensor->streaming && fmt->which == V4L2_SUBDEV_FORMAT_ACTIVE) {
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ret = -EBUSY;
|
|
goto done;
|
|
}
|
|
|
|
/* Scaling is not supported, the format is thus fixed. */
|
|
fmt->format = *__mt9m032_get_pad_format(sensor, cfg, fmt->which);
|
|
ret = 0;
|
|
|
|
done:
|
|
mutex_unlock(&sensor->lock);
|
|
return ret;
|
|
}
|
|
|
|
static int mt9m032_get_pad_selection(struct v4l2_subdev *subdev,
|
|
struct v4l2_subdev_pad_config *cfg,
|
|
struct v4l2_subdev_selection *sel)
|
|
{
|
|
struct mt9m032 *sensor = to_mt9m032(subdev);
|
|
|
|
if (sel->target != V4L2_SEL_TGT_CROP)
|
|
return -EINVAL;
|
|
|
|
mutex_lock(&sensor->lock);
|
|
sel->r = *__mt9m032_get_pad_crop(sensor, cfg, sel->which);
|
|
mutex_unlock(&sensor->lock);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int mt9m032_set_pad_selection(struct v4l2_subdev *subdev,
|
|
struct v4l2_subdev_pad_config *cfg,
|
|
struct v4l2_subdev_selection *sel)
|
|
{
|
|
struct mt9m032 *sensor = to_mt9m032(subdev);
|
|
struct v4l2_mbus_framefmt *format;
|
|
struct v4l2_rect *__crop;
|
|
struct v4l2_rect rect;
|
|
int ret = 0;
|
|
|
|
if (sel->target != V4L2_SEL_TGT_CROP)
|
|
return -EINVAL;
|
|
|
|
mutex_lock(&sensor->lock);
|
|
|
|
if (sensor->streaming && sel->which == V4L2_SUBDEV_FORMAT_ACTIVE) {
|
|
ret = -EBUSY;
|
|
goto done;
|
|
}
|
|
|
|
/* Clamp the crop rectangle boundaries and align them to a multiple of 2
|
|
* pixels to ensure a GRBG Bayer pattern.
|
|
*/
|
|
rect.left = clamp(ALIGN(sel->r.left, 2), MT9M032_COLUMN_START_MIN,
|
|
MT9M032_COLUMN_START_MAX);
|
|
rect.top = clamp(ALIGN(sel->r.top, 2), MT9M032_ROW_START_MIN,
|
|
MT9M032_ROW_START_MAX);
|
|
rect.width = clamp_t(unsigned int, ALIGN(sel->r.width, 2),
|
|
MT9M032_COLUMN_SIZE_MIN, MT9M032_COLUMN_SIZE_MAX);
|
|
rect.height = clamp_t(unsigned int, ALIGN(sel->r.height, 2),
|
|
MT9M032_ROW_SIZE_MIN, MT9M032_ROW_SIZE_MAX);
|
|
|
|
rect.width = min_t(unsigned int, rect.width,
|
|
MT9M032_PIXEL_ARRAY_WIDTH - rect.left);
|
|
rect.height = min_t(unsigned int, rect.height,
|
|
MT9M032_PIXEL_ARRAY_HEIGHT - rect.top);
|
|
|
|
__crop = __mt9m032_get_pad_crop(sensor, cfg, sel->which);
|
|
|
|
if (rect.width != __crop->width || rect.height != __crop->height) {
|
|
/* Reset the output image size if the crop rectangle size has
|
|
* been modified.
|
|
*/
|
|
format = __mt9m032_get_pad_format(sensor, cfg, sel->which);
|
|
format->width = rect.width;
|
|
format->height = rect.height;
|
|
}
|
|
|
|
*__crop = rect;
|
|
sel->r = rect;
|
|
|
|
if (sel->which == V4L2_SUBDEV_FORMAT_ACTIVE)
|
|
ret = mt9m032_update_geom_timing(sensor);
|
|
|
|
done:
|
|
mutex_unlock(&sensor->lock);
|
|
return ret;
|
|
}
|
|
|
|
static int mt9m032_get_frame_interval(struct v4l2_subdev *subdev,
|
|
struct v4l2_subdev_frame_interval *fi)
|
|
{
|
|
struct mt9m032 *sensor = to_mt9m032(subdev);
|
|
|
|
mutex_lock(&sensor->lock);
|
|
memset(fi, 0, sizeof(*fi));
|
|
fi->interval = sensor->frame_interval;
|
|
mutex_unlock(&sensor->lock);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int mt9m032_set_frame_interval(struct v4l2_subdev *subdev,
|
|
struct v4l2_subdev_frame_interval *fi)
|
|
{
|
|
struct mt9m032 *sensor = to_mt9m032(subdev);
|
|
int ret;
|
|
|
|
mutex_lock(&sensor->lock);
|
|
|
|
if (sensor->streaming) {
|
|
ret = -EBUSY;
|
|
goto done;
|
|
}
|
|
|
|
/* Avoid divisions by 0. */
|
|
if (fi->interval.denominator == 0)
|
|
fi->interval.denominator = 1;
|
|
|
|
ret = mt9m032_update_timing(sensor, &fi->interval);
|
|
if (!ret)
|
|
sensor->frame_interval = fi->interval;
|
|
|
|
done:
|
|
mutex_unlock(&sensor->lock);
|
|
return ret;
|
|
}
|
|
|
|
static int mt9m032_s_stream(struct v4l2_subdev *subdev, int streaming)
|
|
{
|
|
struct mt9m032 *sensor = to_mt9m032(subdev);
|
|
int ret;
|
|
|
|
mutex_lock(&sensor->lock);
|
|
ret = update_formatter2(sensor, streaming);
|
|
if (!ret)
|
|
sensor->streaming = streaming;
|
|
mutex_unlock(&sensor->lock);
|
|
|
|
return ret;
|
|
}
|
|
|
|
/* -----------------------------------------------------------------------------
|
|
* V4L2 subdev core operations
|
|
*/
|
|
|
|
#ifdef CONFIG_VIDEO_ADV_DEBUG
|
|
static int mt9m032_g_register(struct v4l2_subdev *sd,
|
|
struct v4l2_dbg_register *reg)
|
|
{
|
|
struct mt9m032 *sensor = to_mt9m032(sd);
|
|
struct i2c_client *client = v4l2_get_subdevdata(&sensor->subdev);
|
|
int val;
|
|
|
|
if (reg->reg > 0xff)
|
|
return -EINVAL;
|
|
|
|
val = mt9m032_read(client, reg->reg);
|
|
if (val < 0)
|
|
return -EIO;
|
|
|
|
reg->size = 2;
|
|
reg->val = val;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int mt9m032_s_register(struct v4l2_subdev *sd,
|
|
const struct v4l2_dbg_register *reg)
|
|
{
|
|
struct mt9m032 *sensor = to_mt9m032(sd);
|
|
struct i2c_client *client = v4l2_get_subdevdata(&sensor->subdev);
|
|
|
|
if (reg->reg > 0xff)
|
|
return -EINVAL;
|
|
|
|
return mt9m032_write(client, reg->reg, reg->val);
|
|
}
|
|
#endif
|
|
|
|
/* -----------------------------------------------------------------------------
|
|
* V4L2 subdev control operations
|
|
*/
|
|
|
|
static int update_read_mode2(struct mt9m032 *sensor, bool vflip, bool hflip)
|
|
{
|
|
struct i2c_client *client = v4l2_get_subdevdata(&sensor->subdev);
|
|
int reg_val = (vflip << MT9M032_READ_MODE2_VFLIP_SHIFT)
|
|
| (hflip << MT9M032_READ_MODE2_HFLIP_SHIFT)
|
|
| MT9M032_READ_MODE2_ROW_BLC
|
|
| 0x0007;
|
|
|
|
return mt9m032_write(client, MT9M032_READ_MODE2, reg_val);
|
|
}
|
|
|
|
static int mt9m032_set_gain(struct mt9m032 *sensor, s32 val)
|
|
{
|
|
struct i2c_client *client = v4l2_get_subdevdata(&sensor->subdev);
|
|
int digital_gain_val; /* in 1/8th (0..127) */
|
|
int analog_mul; /* 0 or 1 */
|
|
int analog_gain_val; /* in 1/16th. (0..63) */
|
|
u16 reg_val;
|
|
|
|
digital_gain_val = 51; /* from setup example */
|
|
|
|
if (val < 63) {
|
|
analog_mul = 0;
|
|
analog_gain_val = val;
|
|
} else {
|
|
analog_mul = 1;
|
|
analog_gain_val = val / 2;
|
|
}
|
|
|
|
/* a_gain = (1 + analog_mul) + (analog_gain_val + 1) / 16 */
|
|
/* overall_gain = a_gain * (1 + digital_gain_val / 8) */
|
|
|
|
reg_val = ((digital_gain_val & MT9M032_GAIN_DIGITAL_MASK)
|
|
<< MT9M032_GAIN_DIGITAL_SHIFT)
|
|
| ((analog_mul & 1) << MT9M032_GAIN_AMUL_SHIFT)
|
|
| (analog_gain_val & MT9M032_GAIN_ANALOG_MASK);
|
|
|
|
return mt9m032_write(client, MT9M032_GAIN_ALL, reg_val);
|
|
}
|
|
|
|
static int mt9m032_try_ctrl(struct v4l2_ctrl *ctrl)
|
|
{
|
|
if (ctrl->id == V4L2_CID_GAIN && ctrl->val >= 63) {
|
|
/* round because of multiplier used for values >= 63 */
|
|
ctrl->val &= ~1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int mt9m032_set_ctrl(struct v4l2_ctrl *ctrl)
|
|
{
|
|
struct mt9m032 *sensor =
|
|
container_of(ctrl->handler, struct mt9m032, ctrls);
|
|
struct i2c_client *client = v4l2_get_subdevdata(&sensor->subdev);
|
|
int ret;
|
|
|
|
switch (ctrl->id) {
|
|
case V4L2_CID_GAIN:
|
|
return mt9m032_set_gain(sensor, ctrl->val);
|
|
|
|
case V4L2_CID_HFLIP:
|
|
/* case V4L2_CID_VFLIP: -- In the same cluster */
|
|
return update_read_mode2(sensor, sensor->vflip->val,
|
|
sensor->hflip->val);
|
|
|
|
case V4L2_CID_EXPOSURE:
|
|
ret = mt9m032_write(client, MT9M032_SHUTTER_WIDTH_HIGH,
|
|
(ctrl->val >> 16) & 0xffff);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
return mt9m032_write(client, MT9M032_SHUTTER_WIDTH_LOW,
|
|
ctrl->val & 0xffff);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct v4l2_ctrl_ops mt9m032_ctrl_ops = {
|
|
.s_ctrl = mt9m032_set_ctrl,
|
|
.try_ctrl = mt9m032_try_ctrl,
|
|
};
|
|
|
|
/* -------------------------------------------------------------------------- */
|
|
|
|
static const struct v4l2_subdev_core_ops mt9m032_core_ops = {
|
|
#ifdef CONFIG_VIDEO_ADV_DEBUG
|
|
.g_register = mt9m032_g_register,
|
|
.s_register = mt9m032_s_register,
|
|
#endif
|
|
};
|
|
|
|
static const struct v4l2_subdev_video_ops mt9m032_video_ops = {
|
|
.s_stream = mt9m032_s_stream,
|
|
.g_frame_interval = mt9m032_get_frame_interval,
|
|
.s_frame_interval = mt9m032_set_frame_interval,
|
|
};
|
|
|
|
static const struct v4l2_subdev_pad_ops mt9m032_pad_ops = {
|
|
.enum_mbus_code = mt9m032_enum_mbus_code,
|
|
.enum_frame_size = mt9m032_enum_frame_size,
|
|
.get_fmt = mt9m032_get_pad_format,
|
|
.set_fmt = mt9m032_set_pad_format,
|
|
.set_selection = mt9m032_set_pad_selection,
|
|
.get_selection = mt9m032_get_pad_selection,
|
|
};
|
|
|
|
static const struct v4l2_subdev_ops mt9m032_ops = {
|
|
.core = &mt9m032_core_ops,
|
|
.video = &mt9m032_video_ops,
|
|
.pad = &mt9m032_pad_ops,
|
|
};
|
|
|
|
/* -----------------------------------------------------------------------------
|
|
* Driver initialization and probing
|
|
*/
|
|
|
|
static int mt9m032_probe(struct i2c_client *client,
|
|
const struct i2c_device_id *devid)
|
|
{
|
|
struct mt9m032_platform_data *pdata = client->dev.platform_data;
|
|
struct i2c_adapter *adapter = client->adapter;
|
|
struct mt9m032 *sensor;
|
|
int chip_version;
|
|
int ret;
|
|
|
|
if (pdata == NULL) {
|
|
dev_err(&client->dev, "No platform data\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_WORD_DATA)) {
|
|
dev_warn(&client->dev,
|
|
"I2C-Adapter doesn't support I2C_FUNC_SMBUS_WORD\n");
|
|
return -EIO;
|
|
}
|
|
|
|
if (!client->dev.platform_data)
|
|
return -ENODEV;
|
|
|
|
sensor = devm_kzalloc(&client->dev, sizeof(*sensor), GFP_KERNEL);
|
|
if (sensor == NULL)
|
|
return -ENOMEM;
|
|
|
|
mutex_init(&sensor->lock);
|
|
|
|
sensor->pdata = pdata;
|
|
|
|
v4l2_i2c_subdev_init(&sensor->subdev, client, &mt9m032_ops);
|
|
sensor->subdev.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
|
|
|
|
chip_version = mt9m032_read(client, MT9M032_CHIP_VERSION);
|
|
if (chip_version != MT9M032_CHIP_VERSION_VALUE) {
|
|
dev_err(&client->dev, "MT9M032 not detected, wrong version "
|
|
"0x%04x\n", chip_version);
|
|
ret = -ENODEV;
|
|
goto error_sensor;
|
|
}
|
|
|
|
dev_info(&client->dev, "MT9M032 detected at address 0x%02x\n",
|
|
client->addr);
|
|
|
|
sensor->frame_interval.numerator = 1;
|
|
sensor->frame_interval.denominator = 30;
|
|
|
|
sensor->crop.left = MT9M032_COLUMN_START_DEF;
|
|
sensor->crop.top = MT9M032_ROW_START_DEF;
|
|
sensor->crop.width = MT9M032_COLUMN_SIZE_DEF;
|
|
sensor->crop.height = MT9M032_ROW_SIZE_DEF;
|
|
|
|
sensor->format.width = sensor->crop.width;
|
|
sensor->format.height = sensor->crop.height;
|
|
sensor->format.code = MEDIA_BUS_FMT_Y8_1X8;
|
|
sensor->format.field = V4L2_FIELD_NONE;
|
|
sensor->format.colorspace = V4L2_COLORSPACE_SRGB;
|
|
|
|
v4l2_ctrl_handler_init(&sensor->ctrls, 5);
|
|
|
|
v4l2_ctrl_new_std(&sensor->ctrls, &mt9m032_ctrl_ops,
|
|
V4L2_CID_GAIN, 0, 127, 1, 64);
|
|
|
|
sensor->hflip = v4l2_ctrl_new_std(&sensor->ctrls,
|
|
&mt9m032_ctrl_ops,
|
|
V4L2_CID_HFLIP, 0, 1, 1, 0);
|
|
sensor->vflip = v4l2_ctrl_new_std(&sensor->ctrls,
|
|
&mt9m032_ctrl_ops,
|
|
V4L2_CID_VFLIP, 0, 1, 1, 0);
|
|
|
|
v4l2_ctrl_new_std(&sensor->ctrls, &mt9m032_ctrl_ops,
|
|
V4L2_CID_EXPOSURE, MT9M032_SHUTTER_WIDTH_MIN,
|
|
MT9M032_SHUTTER_WIDTH_MAX, 1,
|
|
MT9M032_SHUTTER_WIDTH_DEF);
|
|
v4l2_ctrl_new_std(&sensor->ctrls, &mt9m032_ctrl_ops,
|
|
V4L2_CID_PIXEL_RATE, pdata->pix_clock,
|
|
pdata->pix_clock, 1, pdata->pix_clock);
|
|
|
|
if (sensor->ctrls.error) {
|
|
ret = sensor->ctrls.error;
|
|
dev_err(&client->dev, "control initialization error %d\n", ret);
|
|
goto error_ctrl;
|
|
}
|
|
|
|
v4l2_ctrl_cluster(2, &sensor->hflip);
|
|
|
|
sensor->subdev.ctrl_handler = &sensor->ctrls;
|
|
sensor->pad.flags = MEDIA_PAD_FL_SOURCE;
|
|
ret = media_entity_init(&sensor->subdev.entity, 1, &sensor->pad, 0);
|
|
if (ret < 0)
|
|
goto error_ctrl;
|
|
|
|
ret = mt9m032_write(client, MT9M032_RESET, 1); /* reset on */
|
|
if (ret < 0)
|
|
goto error_entity;
|
|
ret = mt9m032_write(client, MT9M032_RESET, 0); /* reset off */
|
|
if (ret < 0)
|
|
goto error_entity;
|
|
|
|
ret = mt9m032_setup_pll(sensor);
|
|
if (ret < 0)
|
|
goto error_entity;
|
|
usleep_range(10000, 11000);
|
|
|
|
ret = v4l2_ctrl_handler_setup(&sensor->ctrls);
|
|
if (ret < 0)
|
|
goto error_entity;
|
|
|
|
/* SIZE */
|
|
ret = mt9m032_update_geom_timing(sensor);
|
|
if (ret < 0)
|
|
goto error_entity;
|
|
|
|
ret = mt9m032_write(client, 0x41, 0x0000); /* reserved !!! */
|
|
if (ret < 0)
|
|
goto error_entity;
|
|
ret = mt9m032_write(client, 0x42, 0x0003); /* reserved !!! */
|
|
if (ret < 0)
|
|
goto error_entity;
|
|
ret = mt9m032_write(client, 0x43, 0x0003); /* reserved !!! */
|
|
if (ret < 0)
|
|
goto error_entity;
|
|
ret = mt9m032_write(client, 0x7f, 0x0000); /* reserved !!! */
|
|
if (ret < 0)
|
|
goto error_entity;
|
|
if (sensor->pdata->invert_pixclock) {
|
|
ret = mt9m032_write(client, MT9M032_PIX_CLK_CTRL,
|
|
MT9M032_PIX_CLK_CTRL_INV_PIXCLK);
|
|
if (ret < 0)
|
|
goto error_entity;
|
|
}
|
|
|
|
ret = mt9m032_write(client, MT9M032_RESTART, 1); /* Restart on */
|
|
if (ret < 0)
|
|
goto error_entity;
|
|
msleep(100);
|
|
ret = mt9m032_write(client, MT9M032_RESTART, 0); /* Restart off */
|
|
if (ret < 0)
|
|
goto error_entity;
|
|
msleep(100);
|
|
ret = update_formatter2(sensor, false);
|
|
if (ret < 0)
|
|
goto error_entity;
|
|
|
|
return ret;
|
|
|
|
error_entity:
|
|
media_entity_cleanup(&sensor->subdev.entity);
|
|
error_ctrl:
|
|
v4l2_ctrl_handler_free(&sensor->ctrls);
|
|
error_sensor:
|
|
mutex_destroy(&sensor->lock);
|
|
return ret;
|
|
}
|
|
|
|
static int mt9m032_remove(struct i2c_client *client)
|
|
{
|
|
struct v4l2_subdev *subdev = i2c_get_clientdata(client);
|
|
struct mt9m032 *sensor = to_mt9m032(subdev);
|
|
|
|
v4l2_device_unregister_subdev(subdev);
|
|
v4l2_ctrl_handler_free(&sensor->ctrls);
|
|
media_entity_cleanup(&subdev->entity);
|
|
mutex_destroy(&sensor->lock);
|
|
return 0;
|
|
}
|
|
|
|
static const struct i2c_device_id mt9m032_id_table[] = {
|
|
{ MT9M032_NAME, 0 },
|
|
{ }
|
|
};
|
|
|
|
MODULE_DEVICE_TABLE(i2c, mt9m032_id_table);
|
|
|
|
static struct i2c_driver mt9m032_i2c_driver = {
|
|
.driver = {
|
|
.name = MT9M032_NAME,
|
|
},
|
|
.probe = mt9m032_probe,
|
|
.remove = mt9m032_remove,
|
|
.id_table = mt9m032_id_table,
|
|
};
|
|
|
|
module_i2c_driver(mt9m032_i2c_driver);
|
|
|
|
MODULE_AUTHOR("Martin Hostettler <martin@neutronstar.dyndns.org>");
|
|
MODULE_DESCRIPTION("MT9M032 camera sensor driver");
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MODULE_LICENSE("GPL v2");
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