From 49796e4059b40032f3dba0fa5ad559ef4b977e89 Mon Sep 17 00:00:00 2001 From: Jean-Francois Moine Date: Mon, 2 Feb 2009 06:33:31 -0300 Subject: [PATCH] V4L/DVB (10432): gspca - vc032x: Cleanup source, optimize and check i2c_write. Signed-off-by: Jean-Francois Moine Signed-off-by: Mauro Carvalho Chehab --- drivers/media/video/gspca/vc032x.c | 93 +++++++++++++++----------------------- 1 file changed, 37 insertions(+), 56 deletions(-) diff --git a/drivers/media/video/gspca/vc032x.c b/drivers/media/video/gspca/vc032x.c index be1507a..f8d535c 100644 --- a/drivers/media/video/gspca/vc032x.c +++ b/drivers/media/video/gspca/vc032x.c @@ -1927,44 +1927,40 @@ static void reg_w(struct usb_device *dev, 500); } -static void read_sensor_register(struct gspca_dev *gspca_dev, - __u16 address, __u16 *value) +static u16 read_sensor_register(struct gspca_dev *gspca_dev, + u16 address) { struct usb_device *dev = gspca_dev->dev; __u8 ldata, mdata, hdata; int retry = 50; - *value = 0; - reg_r(gspca_dev, 0xa1, 0xb33f, 1); - /*PDEBUG(D_PROBE, " I2c Bus Busy Wait 0x%02X ", tmpvalue); */ if (!(gspca_dev->usb_buf[0] & 0x02)) { - PDEBUG(D_ERR, "I2c Bus Busy Wait %d", - gspca_dev->usb_buf[0] & 0x02); - return; + PDEBUG(D_ERR, "I2c Bus Busy Wait %02x", + gspca_dev->usb_buf[0]); + return 0; } reg_w(dev, 0xa0, address, 0xb33a); reg_w(dev, 0xa0, 0x02, 0xb339); - reg_r(gspca_dev, 0xa1, 0xb33b, 1); - while (retry-- && gspca_dev->usb_buf[0]) { + do { + msleep(8); reg_r(gspca_dev, 0xa1, 0xb33b, 1); -/* PDEBUG(D_PROBE, "Read again 0xb33b %d", tmpvalue); */ - msleep(1); - } + } while (retry-- && gspca_dev->usb_buf[0]); + reg_r(gspca_dev, 0xa1, 0xb33e, 1); ldata = gspca_dev->usb_buf[0]; reg_r(gspca_dev, 0xa1, 0xb33d, 1); mdata = gspca_dev->usb_buf[0]; reg_r(gspca_dev, 0xa1, 0xb33c, 1); hdata = gspca_dev->usb_buf[0]; - PDEBUG(D_PROBE, "Read Sensor %02x%02x %02x", - hdata, mdata, ldata); + if (hdata != 0 && mdata != 0 && ldata != 0) + PDEBUG(D_PROBE, "Read Sensor %02x%02x %02x", + hdata, mdata, ldata); reg_r(gspca_dev, 0xa1, 0xb334, 1); if (gspca_dev->usb_buf[0] == 0x02) - *value = (hdata << 8) + mdata; - else - *value = hdata; + return (hdata << 8) + mdata; + return hdata; } static int vc032x_probe_sensor(struct gspca_dev *gspca_dev) @@ -1985,7 +1981,7 @@ static int vc032x_probe_sensor(struct gspca_dev *gspca_dev) reg_w(dev, 0xa0, 0x0c, 0xb309); reg_w(dev, 0xa0, ptsensor_info->I2cAdd, 0xb335); reg_w(dev, 0xa0, ptsensor_info->op, 0xb301); - read_sensor_register(gspca_dev, ptsensor_info->IdAdd, &value); + value = read_sensor_register(gspca_dev, ptsensor_info->IdAdd); if (value == ptsensor_info->VpId) return ptsensor_info->sensorId; @@ -1997,13 +1993,16 @@ static int vc032x_probe_sensor(struct gspca_dev *gspca_dev) return -1; } -static __u8 i2c_write(struct gspca_dev *gspca_dev, +static void i2c_write(struct gspca_dev *gspca_dev, __u8 reg, const __u8 *val, __u8 size) { struct usb_device *dev = gspca_dev->dev; + int retry; +#ifdef GSPCA_DEBUG if (size > 3 || size < 1) - return -EINVAL; + return; +#endif reg_r(gspca_dev, 0xa1, 0xb33f, 1); reg_w(dev, 0xa0, size, 0xb334); reg_w(dev, 0xa0, reg, 0xb33a); @@ -2015,18 +2014,23 @@ static __u8 i2c_write(struct gspca_dev *gspca_dev, reg_w(dev, 0xa0, val[0], 0xb336); reg_w(dev, 0xa0, val[1], 0xb337); break; - case 3: + default: +/* case 3: */ reg_w(dev, 0xa0, val[0], 0xb336); reg_w(dev, 0xa0, val[1], 0xb337); reg_w(dev, 0xa0, val[2], 0xb338); break; - default: - reg_w(dev, 0xa0, 0x01, 0xb334); - return -EINVAL; } reg_w(dev, 0xa0, 0x01, 0xb339); - reg_r(gspca_dev, 0xa1, 0xb33b, 1); - return gspca_dev->usb_buf[0] == 0; + retry = 4; + do { + reg_r(gspca_dev, 0xa1, 0xb33b, 1); + if (gspca_dev->usb_buf[0] == 0) + break; + msleep(20); + } while (--retry > 0); + if (retry <= 0) + PDEBUG(D_ERR, "i2c_write failed"); } static void put_tab_to_reg(struct gspca_dev *gspca_dev, @@ -2051,7 +2055,7 @@ static void usb_exchange(struct gspca_dev *gspca_dev, return; case 0xcc: /* normal write */ reg_w(dev, 0xa0, data[i][2], - ((data[i][0])<<8) | data[i][1]); + (data[i][0]) << 8 | data[i][1]); break; case 0xaa: /* i2c op */ i2c_write(gspca_dev, data[i][1], &data[i][2], 1); @@ -2068,11 +2072,6 @@ static void usb_exchange(struct gspca_dev *gspca_dev, /*not reached*/ } -/* - "GammaT"=hex:04,17,31,4f,6a,83,99,ad,bf,ce,da,e5,ee,f5,fb,ff,ff - "MatrixT"=hex:60,f9,e5,e7,50,05,f3,e6,66 - */ - static void vc0321_reset(struct gspca_dev *gspca_dev) { reg_w(gspca_dev->dev, 0xa0, 0x00, 0xb04d); @@ -2176,7 +2175,7 @@ static int sd_config(struct gspca_dev *gspca_dev, return 0; } -/* this function is called at probe and time */ +/* this function is called at probe and resume time */ static int sd_init(struct gspca_dev *gspca_dev) { return 0; @@ -2332,27 +2331,7 @@ static int sd_start(struct gspca_dev *gspca_dev) put_tab_to_reg(gspca_dev, GammaT, 17, 0xb85b); put_tab_to_reg(gspca_dev, GammaT, 17, 0xb86c); put_tab_to_reg(gspca_dev, MatrixT, 9, 0xb82c); - /* Seem SHARPNESS */ - /* - reg_w(gspca_dev->dev, 0xa0, 0x80, 0xb80a); - reg_w(gspca_dev->dev, 0xa0, 0xff, 0xb80b); - reg_w(gspca_dev->dev, 0xa0, 0xff, 0xb80e); - */ - /* all 0x40 ??? do nothing - reg_w(gspca_dev->dev, 0xa0, 0x40, 0xb822); - reg_w(gspca_dev->dev, 0xa0, 0x40, 0xb823); - reg_w(gspca_dev->dev, 0xa0, 0x40, 0xb824); - */ - /* Only works for HV7131R ?? - reg_r (gspca_dev, 0xa1, 0xb881, 1); - reg_w(gspca_dev->dev, 0xa0, 0xfe01, 0xb881); - reg_w(gspca_dev->dev, 0xa0, 0x79, 0xb801); - */ - /* only hv7131r et ov7660 - reg_w(gspca_dev->dev, 0xa0, 0x20, 0xb827); - reg_w(gspca_dev->dev, 0xa0, 0xff, 0xb826); * ISP_GAIN 80 - reg_w(gspca_dev->dev, 0xa0, 0x23, 0xb800); * ISP CTRL_BAS - */ + /* set the led on 0x0892 0x0896 */ if (sd->sensor != SENSOR_PO1200) { reg_w(gspca_dev->dev, 0x89, 0xffff, 0xfdff); @@ -2502,7 +2481,8 @@ static int sd_querymenu(struct gspca_dev *gspca_dev, case 1: /* V4L2_CID_POWER_LINE_FREQUENCY_50HZ */ strcpy((char *) menu->name, "50 Hz"); return 0; - case 2: /* V4L2_CID_POWER_LINE_FREQUENCY_60HZ */ + default: +/* case 2: * V4L2_CID_POWER_LINE_FREQUENCY_60HZ */ strcpy((char *) menu->name, "60 Hz"); return 0; } @@ -2565,6 +2545,7 @@ static struct usb_driver sd_driver = { static int __init sd_mod_init(void) { int ret; + ret = usb_register(&sd_driver); if (ret < 0) return ret; -- 2.7.4