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Commit d4689b74 authored by Jean-François Moine's avatar Jean-François Moine Committed by Mauro Carvalho Chehab
Browse files

[media] gspca - sn9c20x: Optimize the code of write sequences 



The new functions i2c_w1_buf() and i2c_w2_buf() handle the write loops.

Signed-off-by: default avatarJean-François Moine <moinejf@free.fr>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@redhat.com>
parent 4c632e4e

drivers/media/video/gspca/sn9c20x.c

+66 −103
Original line number Diff line number Diff line
@@ -1172,6 +1172,15 @@ static void i2c_w1(struct gspca_dev *gspca_dev, u8 reg, u8 val) 
	i2c_w(gspca_dev, row);

}



static void i2c_w1_buf(struct gspca_dev *gspca_dev,

			struct i2c_reg_u8 *buf, int sz)

{

	while (--sz >= 0) {

		i2c_w1(gspca_dev, buf->reg, buf->val);

		buf++;

	}

}



static void i2c_w2(struct gspca_dev *gspca_dev, u8 reg, u16 val)

{

	struct sd *sd = (struct sd *) gspca_dev;
@@ -1193,6 +1202,15 @@ static void i2c_w2(struct gspca_dev *gspca_dev, u8 reg, u16 val) 
	i2c_w(gspca_dev, row);

}



static void i2c_w2_buf(struct gspca_dev *gspca_dev,

			struct i2c_reg_u16 *buf, int sz)

{

	while (--sz >= 0) {

		i2c_w2(gspca_dev, buf->reg, buf->val);

		buf++;

	}

}



static void i2c_r1(struct gspca_dev *gspca_dev, u8 reg, u8 *val)

{

	struct sd *sd = (struct sd *) gspca_dev;
@@ -1237,7 +1255,6 @@ static void i2c_r2(struct gspca_dev *gspca_dev, u8 reg, u16 *val) 


static void ov9650_init_sensor(struct gspca_dev *gspca_dev)

{

	int i;

	u16 id;

	struct sd *sd = (struct sd *) gspca_dev;
@@ -1253,33 +1270,23 @@ static void ov9650_init_sensor(struct gspca_dev *gspca_dev) 


	i2c_w1(gspca_dev, 0x12, 0x80);		/* sensor reset */

	msleep(200);

	for (i = 0; i < ARRAY_SIZE(ov9650_init); i++) {

		i2c_w1(gspca_dev, ov9650_init[i].reg,

				ov9650_init[i].val);

		if (gspca_dev->usb_err < 0) {

	i2c_w1_buf(gspca_dev, ov9650_init, ARRAY_SIZE(ov9650_init));

	if (gspca_dev->usb_err < 0)

		pr_err("OV9650 sensor initialization failed\n");

			return;

		}

	}

	sd->hstart = 1;

	sd->vstart = 7;

}



static void ov9655_init_sensor(struct gspca_dev *gspca_dev)

{

	int i;

	struct sd *sd = (struct sd *) gspca_dev;



	i2c_w1(gspca_dev, 0x12, 0x80);		/* sensor reset */

	msleep(200);

	for (i = 0; i < ARRAY_SIZE(ov9655_init); i++) {

		i2c_w1(gspca_dev, ov9655_init[i].reg,

				ov9655_init[i].val);

		if (gspca_dev->usb_err < 0) {

	i2c_w1_buf(gspca_dev, ov9655_init, ARRAY_SIZE(ov9655_init));

	if (gspca_dev->usb_err < 0)

		pr_err("OV9655 sensor initialization failed\n");

			return;

		}

	}



	/* disable hflip and vflip */

	gspca_dev->ctrl_dis = (1 << HFLIP) | (1 << VFLIP);

	sd->hstart = 1;
@@ -1288,19 +1295,14 @@ static void ov9655_init_sensor(struct gspca_dev *gspca_dev) 


static void soi968_init_sensor(struct gspca_dev *gspca_dev)

{

	int i;

	struct sd *sd = (struct sd *) gspca_dev;



	i2c_w1(gspca_dev, 0x12, 0x80);		/* sensor reset */

	msleep(200);

	for (i = 0; i < ARRAY_SIZE(soi968_init); i++) {

		i2c_w1(gspca_dev, soi968_init[i].reg,

				soi968_init[i].val);

		if (gspca_dev->usb_err < 0) {

	i2c_w1_buf(gspca_dev, soi968_init, ARRAY_SIZE(soi968_init));

	if (gspca_dev->usb_err < 0)

		pr_err("SOI968 sensor initialization failed\n");

			return;

		}

	}



	/* disable hflip and vflip */

	gspca_dev->ctrl_dis = (1 << HFLIP) | (1 << VFLIP)

				| (1 << EXPOSURE);
@@ -1310,38 +1312,27 @@ static void soi968_init_sensor(struct gspca_dev *gspca_dev) 


static void ov7660_init_sensor(struct gspca_dev *gspca_dev)

{

	int i;

	struct sd *sd = (struct sd *) gspca_dev;



	i2c_w1(gspca_dev, 0x12, 0x80);		/* sensor reset */

	msleep(200);

	for (i = 0; i < ARRAY_SIZE(ov7660_init); i++) {

		i2c_w1(gspca_dev, ov7660_init[i].reg,

				ov7660_init[i].val);

		if (gspca_dev->usb_err < 0) {

	i2c_w1_buf(gspca_dev, ov7660_init, ARRAY_SIZE(ov7660_init));

	if (gspca_dev->usb_err < 0)

		pr_err("OV7660 sensor initialization failed\n");

			return;

		}

	}

	sd->hstart = 3;

	sd->vstart = 3;

}



static void ov7670_init_sensor(struct gspca_dev *gspca_dev)

{

	int i;

	struct sd *sd = (struct sd *) gspca_dev;



	i2c_w1(gspca_dev, 0x12, 0x80);		/* sensor reset */

	msleep(200);

	for (i = 0; i < ARRAY_SIZE(ov7670_init); i++) {

		i2c_w1(gspca_dev, ov7670_init[i].reg,

				ov7670_init[i].val);

		if (gspca_dev->usb_err < 0) {

	i2c_w1_buf(gspca_dev, ov7670_init, ARRAY_SIZE(ov7670_init));

	if (gspca_dev->usb_err < 0)

		pr_err("OV7670 sensor initialization failed\n");

			return;

		}

	}



	/* disable hflip and vflip */

	gspca_dev->ctrl_dis = (1 << HFLIP) | (1 << VFLIP);

	sd->hstart = 0;
@@ -1351,21 +1342,17 @@ static void ov7670_init_sensor(struct gspca_dev *gspca_dev) 
static void mt9v_init_sensor(struct gspca_dev *gspca_dev)

{

	struct sd *sd = (struct sd *) gspca_dev;

	int i;

	u16 value;



	sd->i2c_addr = 0x5d;

	i2c_r2(gspca_dev, 0xff, &value);

	if (gspca_dev->usb_err >= 0

	 && value == 0x8243) {

		for (i = 0; i < ARRAY_SIZE(mt9v011_init); i++) {

			i2c_w2(gspca_dev, mt9v011_init[i].reg,

					mt9v011_init[i].val);

		i2c_w2_buf(gspca_dev, mt9v011_init, ARRAY_SIZE(mt9v011_init));

		if (gspca_dev->usb_err < 0) {

			pr_err("MT9V011 sensor initialization failed\n");

			return;

		}

		}

		sd->hstart = 2;

		sd->vstart = 2;

		sd->sensor = SENSOR_MT9V011;
@@ -1379,14 +1366,11 @@ static void mt9v_init_sensor(struct gspca_dev *gspca_dev) 
	i2c_r2(gspca_dev, 0xff, &value);

	if (gspca_dev->usb_err >= 0

	 && value == 0x823a) {

		for (i = 0; i < ARRAY_SIZE(mt9v111_init); i++) {

			i2c_w2(gspca_dev, mt9v111_init[i].reg,

					mt9v111_init[i].val);

		i2c_w2_buf(gspca_dev, mt9v111_init, ARRAY_SIZE(mt9v111_init));

		if (gspca_dev->usb_err < 0) {

			pr_err("MT9V111 sensor initialization failed\n");

			return;

		}

		}

		gspca_dev->ctrl_dis = (1 << EXPOSURE)

					| (1 << AUTOGAIN)

					| (1 << GAIN);
@@ -1408,14 +1392,11 @@ static void mt9v_init_sensor(struct gspca_dev *gspca_dev) 
	i2c_r2(gspca_dev, 0x00, &value);

	if (gspca_dev->usb_err >= 0

	 && value == 0x1229) {

		for (i = 0; i < ARRAY_SIZE(mt9v112_init); i++) {

			i2c_w2(gspca_dev, mt9v112_init[i].reg,

					mt9v112_init[i].val);

		i2c_w2_buf(gspca_dev, mt9v112_init, ARRAY_SIZE(mt9v112_init));

		if (gspca_dev->usb_err < 0) {

			pr_err("MT9V112 sensor initialization failed\n");

			return;

		}

		}

		sd->hstart = 6;

		sd->vstart = 2;

		sd->sensor = SENSOR_MT9V112;
@@ -1429,15 +1410,11 @@ static void mt9v_init_sensor(struct gspca_dev *gspca_dev) 
static void mt9m112_init_sensor(struct gspca_dev *gspca_dev)

{

	struct sd *sd = (struct sd *) gspca_dev;

	int i;

	for (i = 0; i < ARRAY_SIZE(mt9m112_init); i++) {

		i2c_w2(gspca_dev, mt9m112_init[i].reg,

				mt9m112_init[i].val);

		if (gspca_dev->usb_err < 0) {



	i2c_w2_buf(gspca_dev, mt9m112_init, ARRAY_SIZE(mt9m112_init));

	if (gspca_dev->usb_err < 0)

		pr_err("MT9M112 sensor initialization failed\n");

			return;

		}

	}



	gspca_dev->ctrl_dis = (1 << EXPOSURE) | (1 << AUTOGAIN)

				| (1 << GAIN);

	sd->hstart = 0;
@@ -1447,15 +1424,11 @@ static void mt9m112_init_sensor(struct gspca_dev *gspca_dev) 
static void mt9m111_init_sensor(struct gspca_dev *gspca_dev)

{

	struct sd *sd = (struct sd *) gspca_dev;

	int i;

	for (i = 0; i < ARRAY_SIZE(mt9m111_init); i++) {

		i2c_w2(gspca_dev, mt9m111_init[i].reg,

				mt9m111_init[i].val);

		if (gspca_dev->usb_err < 0) {



	i2c_w2_buf(gspca_dev, mt9m111_init, ARRAY_SIZE(mt9m111_init));

	if (gspca_dev->usb_err < 0)

		pr_err("MT9M111 sensor initialization failed\n");

			return;

		}

	}



	gspca_dev->ctrl_dis = (1 << EXPOSURE) | (1 << AUTOGAIN)

				| (1 << GAIN);

	sd->hstart = 0;
@@ -1465,7 +1438,6 @@ static void mt9m111_init_sensor(struct gspca_dev *gspca_dev) 
static void mt9m001_init_sensor(struct gspca_dev *gspca_dev)

{

	struct sd *sd = (struct sd *) gspca_dev;

	int i;

	u16 id;



	i2c_r2(gspca_dev, 0x00, &id);
@@ -1487,14 +1459,10 @@ static void mt9m001_init_sensor(struct gspca_dev *gspca_dev) 
		return;

	}



	for (i = 0; i < ARRAY_SIZE(mt9m001_init); i++) {

		i2c_w2(gspca_dev, mt9m001_init[i].reg,

				mt9m001_init[i].val);

		if (gspca_dev->usb_err < 0) {

	i2c_w2_buf(gspca_dev, mt9m001_init, ARRAY_SIZE(mt9m001_init));

	if (gspca_dev->usb_err < 0)

		pr_err("MT9M001 sensor initialization failed\n");

			return;

		}

	}



	/* disable hflip and vflip */

	gspca_dev->ctrl_dis = (1 << HFLIP) | (1 << VFLIP);

	sd->hstart = 1;
@@ -1503,17 +1471,12 @@ static void mt9m001_init_sensor(struct gspca_dev *gspca_dev) 


static void hv7131r_init_sensor(struct gspca_dev *gspca_dev)

{

	int i;

	struct sd *sd = (struct sd *) gspca_dev;



	for (i = 0; i < ARRAY_SIZE(hv7131r_init); i++) {

		i2c_w1(gspca_dev, hv7131r_init[i].reg,

				hv7131r_init[i].val);

		if (gspca_dev->usb_err < 0) {

	i2c_w1_buf(gspca_dev, hv7131r_init, ARRAY_SIZE(hv7131r_init));

	if (gspca_dev->usb_err < 0)

		pr_err("HV7131R Sensor initialization failed\n");

			return;

		}

	}



	sd->hstart = 0;

	sd->vstart = 1;

}