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596 lines
14 KiB
596 lines
14 KiB
// SPDX-License-Identifier: GPL-2.0 |
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// |
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// mt9v011 -Micron 1/4-Inch VGA Digital Image Sensor |
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// |
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// Copyright (c) 2009 Mauro Carvalho Chehab <[email protected]> |
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#include <linux/i2c.h> |
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#include <linux/slab.h> |
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#include <linux/videodev2.h> |
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#include <linux/delay.h> |
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#include <linux/module.h> |
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#include <asm/div64.h> |
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#include <media/v4l2-device.h> |
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#include <media/v4l2-ctrls.h> |
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#include <media/i2c/mt9v011.h> |
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MODULE_DESCRIPTION("Micron mt9v011 sensor driver"); |
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MODULE_AUTHOR("Mauro Carvalho Chehab"); |
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MODULE_LICENSE("GPL v2"); |
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static int debug; |
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module_param(debug, int, 0); |
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MODULE_PARM_DESC(debug, "Debug level (0-2)"); |
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#define R00_MT9V011_CHIP_VERSION 0x00 |
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#define R01_MT9V011_ROWSTART 0x01 |
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#define R02_MT9V011_COLSTART 0x02 |
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#define R03_MT9V011_HEIGHT 0x03 |
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#define R04_MT9V011_WIDTH 0x04 |
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#define R05_MT9V011_HBLANK 0x05 |
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#define R06_MT9V011_VBLANK 0x06 |
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#define R07_MT9V011_OUT_CTRL 0x07 |
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#define R09_MT9V011_SHUTTER_WIDTH 0x09 |
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#define R0A_MT9V011_CLK_SPEED 0x0a |
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#define R0B_MT9V011_RESTART 0x0b |
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#define R0C_MT9V011_SHUTTER_DELAY 0x0c |
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#define R0D_MT9V011_RESET 0x0d |
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#define R1E_MT9V011_DIGITAL_ZOOM 0x1e |
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#define R20_MT9V011_READ_MODE 0x20 |
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#define R2B_MT9V011_GREEN_1_GAIN 0x2b |
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#define R2C_MT9V011_BLUE_GAIN 0x2c |
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#define R2D_MT9V011_RED_GAIN 0x2d |
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#define R2E_MT9V011_GREEN_2_GAIN 0x2e |
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#define R35_MT9V011_GLOBAL_GAIN 0x35 |
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#define RF1_MT9V011_CHIP_ENABLE 0xf1 |
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#define MT9V011_VERSION 0x8232 |
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#define MT9V011_REV_B_VERSION 0x8243 |
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struct mt9v011 { |
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struct v4l2_subdev sd; |
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#ifdef CONFIG_MEDIA_CONTROLLER |
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struct media_pad pad; |
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#endif |
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struct v4l2_ctrl_handler ctrls; |
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unsigned width, height; |
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unsigned xtal; |
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unsigned hflip:1; |
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unsigned vflip:1; |
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u16 global_gain, exposure; |
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s16 red_bal, blue_bal; |
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}; |
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static inline struct mt9v011 *to_mt9v011(struct v4l2_subdev *sd) |
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{ |
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return container_of(sd, struct mt9v011, sd); |
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} |
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static int mt9v011_read(struct v4l2_subdev *sd, unsigned char addr) |
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{ |
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struct i2c_client *c = v4l2_get_subdevdata(sd); |
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__be16 buffer; |
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int rc, val; |
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rc = i2c_master_send(c, &addr, 1); |
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if (rc != 1) |
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v4l2_dbg(0, debug, sd, |
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"i2c i/o error: rc == %d (should be 1)\n", rc); |
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msleep(10); |
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rc = i2c_master_recv(c, (char *)&buffer, 2); |
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if (rc != 2) |
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v4l2_dbg(0, debug, sd, |
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"i2c i/o error: rc == %d (should be 2)\n", rc); |
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val = be16_to_cpu(buffer); |
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v4l2_dbg(2, debug, sd, "mt9v011: read 0x%02x = 0x%04x\n", addr, val); |
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return val; |
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} |
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static void mt9v011_write(struct v4l2_subdev *sd, unsigned char addr, |
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u16 value) |
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{ |
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struct i2c_client *c = v4l2_get_subdevdata(sd); |
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unsigned char buffer[3]; |
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int rc; |
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buffer[0] = addr; |
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buffer[1] = value >> 8; |
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buffer[2] = value & 0xff; |
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v4l2_dbg(2, debug, sd, |
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"mt9v011: writing 0x%02x 0x%04x\n", buffer[0], value); |
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rc = i2c_master_send(c, buffer, 3); |
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if (rc != 3) |
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v4l2_dbg(0, debug, sd, |
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"i2c i/o error: rc == %d (should be 3)\n", rc); |
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} |
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struct i2c_reg_value { |
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unsigned char reg; |
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u16 value; |
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}; |
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/* |
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* Values used at the original driver |
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* Some values are marked as Reserved at the datasheet |
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*/ |
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static const struct i2c_reg_value mt9v011_init_default[] = { |
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{ R0D_MT9V011_RESET, 0x0001 }, |
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{ R0D_MT9V011_RESET, 0x0000 }, |
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{ R0C_MT9V011_SHUTTER_DELAY, 0x0000 }, |
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{ R09_MT9V011_SHUTTER_WIDTH, 0x1fc }, |
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{ R0A_MT9V011_CLK_SPEED, 0x0000 }, |
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{ R1E_MT9V011_DIGITAL_ZOOM, 0x0000 }, |
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{ R07_MT9V011_OUT_CTRL, 0x0002 }, /* chip enable */ |
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}; |
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static u16 calc_mt9v011_gain(s16 lineargain) |
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{ |
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u16 digitalgain = 0; |
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u16 analogmult = 0; |
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u16 analoginit = 0; |
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if (lineargain < 0) |
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lineargain = 0; |
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/* recommended minimum */ |
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lineargain += 0x0020; |
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if (lineargain > 2047) |
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lineargain = 2047; |
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if (lineargain > 1023) { |
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digitalgain = 3; |
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analogmult = 3; |
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analoginit = lineargain / 16; |
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} else if (lineargain > 511) { |
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digitalgain = 1; |
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analogmult = 3; |
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analoginit = lineargain / 8; |
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} else if (lineargain > 255) { |
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analogmult = 3; |
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analoginit = lineargain / 4; |
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} else if (lineargain > 127) { |
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analogmult = 1; |
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analoginit = lineargain / 2; |
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} else |
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analoginit = lineargain; |
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return analoginit + (analogmult << 7) + (digitalgain << 9); |
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} |
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static void set_balance(struct v4l2_subdev *sd) |
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{ |
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struct mt9v011 *core = to_mt9v011(sd); |
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u16 green_gain, blue_gain, red_gain; |
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u16 exposure; |
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s16 bal; |
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exposure = core->exposure; |
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green_gain = calc_mt9v011_gain(core->global_gain); |
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bal = core->global_gain; |
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bal += (core->blue_bal * core->global_gain / (1 << 7)); |
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blue_gain = calc_mt9v011_gain(bal); |
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bal = core->global_gain; |
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bal += (core->red_bal * core->global_gain / (1 << 7)); |
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red_gain = calc_mt9v011_gain(bal); |
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mt9v011_write(sd, R2B_MT9V011_GREEN_1_GAIN, green_gain); |
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mt9v011_write(sd, R2E_MT9V011_GREEN_2_GAIN, green_gain); |
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mt9v011_write(sd, R2C_MT9V011_BLUE_GAIN, blue_gain); |
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mt9v011_write(sd, R2D_MT9V011_RED_GAIN, red_gain); |
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mt9v011_write(sd, R09_MT9V011_SHUTTER_WIDTH, exposure); |
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} |
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static void calc_fps(struct v4l2_subdev *sd, u32 *numerator, u32 *denominator) |
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{ |
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struct mt9v011 *core = to_mt9v011(sd); |
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unsigned height, width, hblank, vblank, speed; |
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unsigned row_time, t_time; |
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u64 frames_per_ms; |
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unsigned tmp; |
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height = mt9v011_read(sd, R03_MT9V011_HEIGHT); |
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width = mt9v011_read(sd, R04_MT9V011_WIDTH); |
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hblank = mt9v011_read(sd, R05_MT9V011_HBLANK); |
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vblank = mt9v011_read(sd, R06_MT9V011_VBLANK); |
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speed = mt9v011_read(sd, R0A_MT9V011_CLK_SPEED); |
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row_time = (width + 113 + hblank) * (speed + 2); |
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t_time = row_time * (height + vblank + 1); |
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frames_per_ms = core->xtal * 1000l; |
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do_div(frames_per_ms, t_time); |
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tmp = frames_per_ms; |
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v4l2_dbg(1, debug, sd, "Programmed to %u.%03u fps (%d pixel clcks)\n", |
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tmp / 1000, tmp % 1000, t_time); |
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if (numerator && denominator) { |
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*numerator = 1000; |
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*denominator = (u32)frames_per_ms; |
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} |
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} |
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static u16 calc_speed(struct v4l2_subdev *sd, u32 numerator, u32 denominator) |
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{ |
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struct mt9v011 *core = to_mt9v011(sd); |
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unsigned height, width, hblank, vblank; |
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unsigned row_time, line_time; |
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u64 t_time, speed; |
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/* Avoid bogus calculus */ |
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if (!numerator || !denominator) |
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return 0; |
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height = mt9v011_read(sd, R03_MT9V011_HEIGHT); |
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width = mt9v011_read(sd, R04_MT9V011_WIDTH); |
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hblank = mt9v011_read(sd, R05_MT9V011_HBLANK); |
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vblank = mt9v011_read(sd, R06_MT9V011_VBLANK); |
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row_time = width + 113 + hblank; |
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line_time = height + vblank + 1; |
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t_time = core->xtal * ((u64)numerator); |
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/* round to the closest value */ |
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t_time += denominator / 2; |
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do_div(t_time, denominator); |
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speed = t_time; |
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do_div(speed, row_time * line_time); |
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/* Avoid having a negative value for speed */ |
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if (speed < 2) |
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speed = 0; |
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else |
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speed -= 2; |
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/* Avoid speed overflow */ |
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if (speed > 15) |
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return 15; |
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return (u16)speed; |
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} |
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static void set_res(struct v4l2_subdev *sd) |
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{ |
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struct mt9v011 *core = to_mt9v011(sd); |
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unsigned vstart, hstart; |
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/* |
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* The mt9v011 doesn't have scaling. So, in order to select the desired |
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* resolution, we're cropping at the middle of the sensor. |
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* hblank and vblank should be adjusted, in order to warrant that |
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* we'll preserve the line timings for 30 fps, no matter what resolution |
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* is selected. |
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* NOTE: datasheet says that width (and height) should be filled with |
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* width-1. However, this doesn't work, since one pixel per line will |
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* be missing. |
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*/ |
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hstart = 20 + (640 - core->width) / 2; |
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mt9v011_write(sd, R02_MT9V011_COLSTART, hstart); |
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mt9v011_write(sd, R04_MT9V011_WIDTH, core->width); |
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mt9v011_write(sd, R05_MT9V011_HBLANK, 771 - core->width); |
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vstart = 8 + (480 - core->height) / 2; |
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mt9v011_write(sd, R01_MT9V011_ROWSTART, vstart); |
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mt9v011_write(sd, R03_MT9V011_HEIGHT, core->height); |
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mt9v011_write(sd, R06_MT9V011_VBLANK, 508 - core->height); |
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calc_fps(sd, NULL, NULL); |
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}; |
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static void set_read_mode(struct v4l2_subdev *sd) |
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{ |
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struct mt9v011 *core = to_mt9v011(sd); |
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unsigned mode = 0x1000; |
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if (core->hflip) |
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mode |= 0x4000; |
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if (core->vflip) |
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mode |= 0x8000; |
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mt9v011_write(sd, R20_MT9V011_READ_MODE, mode); |
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} |
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static int mt9v011_reset(struct v4l2_subdev *sd, u32 val) |
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{ |
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int i; |
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for (i = 0; i < ARRAY_SIZE(mt9v011_init_default); i++) |
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mt9v011_write(sd, mt9v011_init_default[i].reg, |
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mt9v011_init_default[i].value); |
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set_balance(sd); |
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set_res(sd); |
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set_read_mode(sd); |
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return 0; |
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} |
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static int mt9v011_enum_mbus_code(struct v4l2_subdev *sd, |
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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->pad || code->index > 0) |
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return -EINVAL; |
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code->code = MEDIA_BUS_FMT_SGRBG8_1X8; |
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return 0; |
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} |
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static int mt9v011_set_fmt(struct v4l2_subdev *sd, |
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struct v4l2_subdev_pad_config *cfg, |
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struct v4l2_subdev_format *format) |
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{ |
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struct v4l2_mbus_framefmt *fmt = &format->format; |
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struct mt9v011 *core = to_mt9v011(sd); |
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if (format->pad || fmt->code != MEDIA_BUS_FMT_SGRBG8_1X8) |
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return -EINVAL; |
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v4l_bound_align_image(&fmt->width, 48, 639, 1, |
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&fmt->height, 32, 480, 1, 0); |
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fmt->field = V4L2_FIELD_NONE; |
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fmt->colorspace = V4L2_COLORSPACE_SRGB; |
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if (format->which == V4L2_SUBDEV_FORMAT_ACTIVE) { |
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core->width = fmt->width; |
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core->height = fmt->height; |
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set_res(sd); |
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} else { |
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cfg->try_fmt = *fmt; |
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} |
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return 0; |
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} |
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static int mt9v011_g_frame_interval(struct v4l2_subdev *sd, |
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struct v4l2_subdev_frame_interval *ival) |
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{ |
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calc_fps(sd, |
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&ival->interval.numerator, |
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&ival->interval.denominator); |
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return 0; |
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} |
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static int mt9v011_s_frame_interval(struct v4l2_subdev *sd, |
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struct v4l2_subdev_frame_interval *ival) |
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{ |
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struct v4l2_fract *tpf = &ival->interval; |
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u16 speed; |
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speed = calc_speed(sd, tpf->numerator, tpf->denominator); |
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mt9v011_write(sd, R0A_MT9V011_CLK_SPEED, speed); |
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v4l2_dbg(1, debug, sd, "Setting speed to %d\n", speed); |
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/* Recalculate and update fps info */ |
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calc_fps(sd, &tpf->numerator, &tpf->denominator); |
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return 0; |
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} |
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#ifdef CONFIG_VIDEO_ADV_DEBUG |
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static int mt9v011_g_register(struct v4l2_subdev *sd, |
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struct v4l2_dbg_register *reg) |
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{ |
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reg->val = mt9v011_read(sd, reg->reg & 0xff); |
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reg->size = 2; |
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return 0; |
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} |
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static int mt9v011_s_register(struct v4l2_subdev *sd, |
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const struct v4l2_dbg_register *reg) |
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{ |
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mt9v011_write(sd, reg->reg & 0xff, reg->val & 0xffff); |
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return 0; |
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} |
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#endif |
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static int mt9v011_s_ctrl(struct v4l2_ctrl *ctrl) |
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{ |
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struct mt9v011 *core = |
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container_of(ctrl->handler, struct mt9v011, ctrls); |
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struct v4l2_subdev *sd = &core->sd; |
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switch (ctrl->id) { |
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case V4L2_CID_GAIN: |
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core->global_gain = ctrl->val; |
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break; |
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case V4L2_CID_EXPOSURE: |
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core->exposure = ctrl->val; |
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break; |
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case V4L2_CID_RED_BALANCE: |
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core->red_bal = ctrl->val; |
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break; |
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case V4L2_CID_BLUE_BALANCE: |
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core->blue_bal = ctrl->val; |
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break; |
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case V4L2_CID_HFLIP: |
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core->hflip = ctrl->val; |
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set_read_mode(sd); |
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return 0; |
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case V4L2_CID_VFLIP: |
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core->vflip = ctrl->val; |
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set_read_mode(sd); |
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return 0; |
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default: |
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return -EINVAL; |
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} |
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set_balance(sd); |
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return 0; |
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} |
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static const struct v4l2_ctrl_ops mt9v011_ctrl_ops = { |
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.s_ctrl = mt9v011_s_ctrl, |
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}; |
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static const struct v4l2_subdev_core_ops mt9v011_core_ops = { |
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.reset = mt9v011_reset, |
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#ifdef CONFIG_VIDEO_ADV_DEBUG |
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.g_register = mt9v011_g_register, |
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.s_register = mt9v011_s_register, |
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#endif |
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}; |
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static const struct v4l2_subdev_video_ops mt9v011_video_ops = { |
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.g_frame_interval = mt9v011_g_frame_interval, |
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.s_frame_interval = mt9v011_s_frame_interval, |
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}; |
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static const struct v4l2_subdev_pad_ops mt9v011_pad_ops = { |
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.enum_mbus_code = mt9v011_enum_mbus_code, |
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.set_fmt = mt9v011_set_fmt, |
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}; |
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static const struct v4l2_subdev_ops mt9v011_ops = { |
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.core = &mt9v011_core_ops, |
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.video = &mt9v011_video_ops, |
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.pad = &mt9v011_pad_ops, |
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}; |
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/**************************************************************************** |
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I2C Client & Driver |
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****************************************************************************/ |
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static int mt9v011_probe(struct i2c_client *c, |
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const struct i2c_device_id *id) |
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{ |
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u16 version; |
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struct mt9v011 *core; |
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struct v4l2_subdev *sd; |
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#ifdef CONFIG_MEDIA_CONTROLLER |
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int ret; |
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#endif |
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/* Check if the adapter supports the needed features */ |
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if (!i2c_check_functionality(c->adapter, |
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I2C_FUNC_SMBUS_READ_BYTE | I2C_FUNC_SMBUS_WRITE_BYTE_DATA)) |
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return -EIO; |
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core = devm_kzalloc(&c->dev, sizeof(struct mt9v011), GFP_KERNEL); |
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if (!core) |
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return -ENOMEM; |
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sd = &core->sd; |
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v4l2_i2c_subdev_init(sd, c, &mt9v011_ops); |
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#ifdef CONFIG_MEDIA_CONTROLLER |
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core->pad.flags = MEDIA_PAD_FL_SOURCE; |
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sd->entity.function = MEDIA_ENT_F_CAM_SENSOR; |
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ret = media_entity_pads_init(&sd->entity, 1, &core->pad); |
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if (ret < 0) |
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return ret; |
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#endif |
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/* Check if the sensor is really a MT9V011 */ |
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version = mt9v011_read(sd, R00_MT9V011_CHIP_VERSION); |
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if ((version != MT9V011_VERSION) && |
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(version != MT9V011_REV_B_VERSION)) { |
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v4l2_info(sd, "*** unknown micron chip detected (0x%04x).\n", |
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version); |
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return -EINVAL; |
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} |
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v4l2_ctrl_handler_init(&core->ctrls, 5); |
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v4l2_ctrl_new_std(&core->ctrls, &mt9v011_ctrl_ops, |
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V4L2_CID_GAIN, 0, (1 << 12) - 1 - 0x20, 1, 0x20); |
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v4l2_ctrl_new_std(&core->ctrls, &mt9v011_ctrl_ops, |
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V4L2_CID_EXPOSURE, 0, 2047, 1, 0x01fc); |
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v4l2_ctrl_new_std(&core->ctrls, &mt9v011_ctrl_ops, |
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V4L2_CID_RED_BALANCE, -(1 << 9), (1 << 9) - 1, 1, 0); |
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v4l2_ctrl_new_std(&core->ctrls, &mt9v011_ctrl_ops, |
|
V4L2_CID_BLUE_BALANCE, -(1 << 9), (1 << 9) - 1, 1, 0); |
|
v4l2_ctrl_new_std(&core->ctrls, &mt9v011_ctrl_ops, |
|
V4L2_CID_HFLIP, 0, 1, 1, 0); |
|
v4l2_ctrl_new_std(&core->ctrls, &mt9v011_ctrl_ops, |
|
V4L2_CID_VFLIP, 0, 1, 1, 0); |
|
|
|
if (core->ctrls.error) { |
|
int ret = core->ctrls.error; |
|
|
|
v4l2_err(sd, "control initialization error %d\n", ret); |
|
v4l2_ctrl_handler_free(&core->ctrls); |
|
return ret; |
|
} |
|
core->sd.ctrl_handler = &core->ctrls; |
|
|
|
core->global_gain = 0x0024; |
|
core->exposure = 0x01fc; |
|
core->width = 640; |
|
core->height = 480; |
|
core->xtal = 27000000; /* Hz */ |
|
|
|
if (c->dev.platform_data) { |
|
struct mt9v011_platform_data *pdata = c->dev.platform_data; |
|
|
|
core->xtal = pdata->xtal; |
|
v4l2_dbg(1, debug, sd, "xtal set to %d.%03d MHz\n", |
|
core->xtal / 1000000, (core->xtal / 1000) % 1000); |
|
} |
|
|
|
v4l_info(c, "chip found @ 0x%02x (%s - chip version 0x%04x)\n", |
|
c->addr << 1, c->adapter->name, version); |
|
|
|
return 0; |
|
} |
|
|
|
static int mt9v011_remove(struct i2c_client *c) |
|
{ |
|
struct v4l2_subdev *sd = i2c_get_clientdata(c); |
|
struct mt9v011 *core = to_mt9v011(sd); |
|
|
|
v4l2_dbg(1, debug, sd, |
|
"mt9v011.c: removing mt9v011 adapter on address 0x%x\n", |
|
c->addr << 1); |
|
|
|
v4l2_device_unregister_subdev(sd); |
|
v4l2_ctrl_handler_free(&core->ctrls); |
|
|
|
return 0; |
|
} |
|
|
|
/* ----------------------------------------------------------------------- */ |
|
|
|
static const struct i2c_device_id mt9v011_id[] = { |
|
{ "mt9v011", 0 }, |
|
{ } |
|
}; |
|
MODULE_DEVICE_TABLE(i2c, mt9v011_id); |
|
|
|
static struct i2c_driver mt9v011_driver = { |
|
.driver = { |
|
.name = "mt9v011", |
|
}, |
|
.probe = mt9v011_probe, |
|
.remove = mt9v011_remove, |
|
.id_table = mt9v011_id, |
|
}; |
|
|
|
module_i2c_driver(mt9v011_driver);
|
|
|