[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: Jean-François Moine <moinejf@free.fr>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

diff --git a/drivers/media/video/gspca/sn9c20x.c b/drivers/media/video/gspca/sn9c20x.c
index 0894a3d..e45f5c4 100644 (file)
--- a/drivers/media/video/gspca/sn9c20x.c
+++ b/drivers/media/video/gspca/sn9c20x.c
@@ -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) {
-                       pr_err("OV9650 sensor initialization failed\n");
-                       return;
-               }
-       }
+       i2c_w1_buf(gspca_dev, ov9650_init, ARRAY_SIZE(ov9650_init));
+       if (gspca_dev->usb_err < 0)
+               pr_err("OV9650 sensor initialization failed\n");
        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) {
-                       pr_err("OV9655 sensor initialization failed\n");
-                       return;
-               }
-       }
+       i2c_w1_buf(gspca_dev, ov9655_init, ARRAY_SIZE(ov9655_init));
+       if (gspca_dev->usb_err < 0)
+               pr_err("OV9655 sensor initialization failed\n");
+
        /* 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) {
-                       pr_err("SOI968 sensor initialization failed\n");
-                       return;
-               }
-       }
+       i2c_w1_buf(gspca_dev, soi968_init, ARRAY_SIZE(soi968_init));
+       if (gspca_dev->usb_err < 0)
+               pr_err("SOI968 sensor initialization failed\n");
+
        /* 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) {
-                       pr_err("OV7660 sensor initialization failed\n");
-                       return;
-               }
-       }
+       i2c_w1_buf(gspca_dev, ov7660_init, ARRAY_SIZE(ov7660_init));
+       if (gspca_dev->usb_err < 0)
+               pr_err("OV7660 sensor initialization failed\n");
        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) {
-                       pr_err("OV7670 sensor initialization failed\n");
-                       return;
-               }
-       }
+       i2c_w1_buf(gspca_dev, ov7670_init, ARRAY_SIZE(ov7670_init));
+       if (gspca_dev->usb_err < 0)
+               pr_err("OV7670 sensor initialization failed\n");
+
        /* disable hflip and vflip */
        gspca_dev->ctrl_dis = (1 << HFLIP) | (1 << VFLIP);
        sd->hstart = 0;
@@ -1351,20 +1342,16 @@ 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);
-                       if (gspca_dev->usb_err < 0) {
-                               pr_err("MT9V011 sensor initialization failed\n");
-                               return;
-                       }
+               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;
@@ -1379,13 +1366,10 @@ 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);
-                       if (gspca_dev->usb_err < 0) {
-                               pr_err("MT9V111 sensor initialization failed\n");
-                               return;
-                       }
+               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)
@@ -1408,13 +1392,10 @@ 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);
-                       if (gspca_dev->usb_err < 0) {
-                               pr_err("MT9V112 sensor initialization failed\n");
-                               return;
-                       }
+               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;
@@ -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) {
-                       pr_err("MT9M112 sensor initialization failed\n");
-                       return;
-               }
-       }
+
+       i2c_w2_buf(gspca_dev, mt9m112_init, ARRAY_SIZE(mt9m112_init));
+       if (gspca_dev->usb_err < 0)
+               pr_err("MT9M112 sensor initialization failed\n");
+
        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) {
-                       pr_err("MT9M111 sensor initialization failed\n");
-                       return;
-               }
-       }
+
+       i2c_w2_buf(gspca_dev, mt9m111_init, ARRAY_SIZE(mt9m111_init));
+       if (gspca_dev->usb_err < 0)
+               pr_err("MT9M111 sensor initialization failed\n");
+
        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) {
-                       pr_err("MT9M001 sensor initialization failed\n");
-                       return;
-               }
-       }
+       i2c_w2_buf(gspca_dev, mt9m001_init, ARRAY_SIZE(mt9m001_init));
+       if (gspca_dev->usb_err < 0)
+               pr_err("MT9M001 sensor initialization failed\n");
+
        /* 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) {
-                       pr_err("HV7131R Sensor initialization failed\n");
-                       return;
-               }
-       }
+       i2c_w1_buf(gspca_dev, hv7131r_init, ARRAY_SIZE(hv7131r_init));
+       if (gspca_dev->usb_err < 0)
+               pr_err("HV7131R Sensor initialization failed\n");
+
        sd->hstart = 0;
        sd->vstart = 1;
 }