diff options
Diffstat (limited to 'drivers/media/video/gspca/w996Xcf.c')
| -rw-r--r-- | drivers/media/video/gspca/w996Xcf.c | 282 |
1 files changed, 123 insertions, 159 deletions
diff --git a/drivers/media/video/gspca/w996Xcf.c b/drivers/media/video/gspca/w996Xcf.c index 8bffde1..4a9e622 100644 --- a/drivers/media/video/gspca/w996Xcf.c +++ b/drivers/media/video/gspca/w996Xcf.c @@ -59,18 +59,21 @@ static const struct v4l2_pix_format w9968cf_vga_mode[] = { .colorspace = V4L2_COLORSPACE_JPEG}, }; -static int reg_w(struct sd *sd, u16 index, u16 value); +static void reg_w(struct sd *sd, u16 index, u16 value); /*-------------------------------------------------------------------------- Write 64-bit data to the fast serial bus registers. Return 0 on success, -1 otherwise. --------------------------------------------------------------------------*/ -static int w9968cf_write_fsb(struct sd *sd, u16* data) +static void w9968cf_write_fsb(struct sd *sd, u16* data) { struct usb_device *udev = sd->gspca_dev.dev; u16 value; int ret; + if (sd->gspca_dev.usb_err < 0) + return; + value = *data++; memcpy(sd->gspca_dev.usb_buf, data, 6); @@ -79,20 +82,21 @@ static int w9968cf_write_fsb(struct sd *sd, u16* data) value, 0x06, sd->gspca_dev.usb_buf, 6, 500); if (ret < 0) { err("Write FSB registers failed (%d)", ret); - return ret; + sd->gspca_dev.usb_err = ret; } - - return 0; } /*-------------------------------------------------------------------------- Write data to the serial bus control register. Return 0 on success, a negative number otherwise. --------------------------------------------------------------------------*/ -static int w9968cf_write_sb(struct sd *sd, u16 value) +static void w9968cf_write_sb(struct sd *sd, u16 value) { int ret; + if (sd->gspca_dev.usb_err < 0) + return; + /* We don't use reg_w here, as that would cause all writes when bitbanging i2c to be logged, making the logs impossible to read */ ret = usb_control_msg(sd->gspca_dev.dev, @@ -105,10 +109,8 @@ static int w9968cf_write_sb(struct sd *sd, u16 value) if (ret < 0) { err("Write SB reg [01] %04x failed", value); - return ret; + sd->gspca_dev.usb_err = ret; } - - return 0; } /*-------------------------------------------------------------------------- @@ -119,6 +121,9 @@ static int w9968cf_read_sb(struct sd *sd) { int ret; + if (sd->gspca_dev.usb_err < 0) + return -1; + /* We don't use reg_r here, as the w9968cf is special and has 16 bit registers instead of 8 bit */ ret = usb_control_msg(sd->gspca_dev.dev, @@ -126,11 +131,13 @@ static int w9968cf_read_sb(struct sd *sd) 1, USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE, 0, 0x01, sd->gspca_dev.usb_buf, 2, 500); - if (ret >= 0) + if (ret >= 0) { ret = sd->gspca_dev.usb_buf[0] | (sd->gspca_dev.usb_buf[1] << 8); - else + } else { err("Read SB reg [01] failed"); + sd->gspca_dev.usb_err = ret; + } udelay(W9968CF_I2C_BUS_DELAY); @@ -142,12 +149,12 @@ static int w9968cf_read_sb(struct sd *sd) This function is called by w9968cf_start_transfer(). Return 0 on success, a negative number otherwise. --------------------------------------------------------------------------*/ -static int w9968cf_upload_quantizationtables(struct sd *sd) +static void w9968cf_upload_quantizationtables(struct sd *sd) { u16 a, b; - int ret = 0, i, j; + int i, j; - ret += reg_w(sd, 0x39, 0x0010); /* JPEG clock enable */ + reg_w(sd, 0x39, 0x0010); /* JPEG clock enable */ for (i = 0, j = 0; i < 32; i++, j += 2) { a = Y_QUANTABLE[j] | ((unsigned)(Y_QUANTABLE[j + 1]) << 8); @@ -155,9 +162,7 @@ static int w9968cf_upload_quantizationtables(struct sd *sd) reg_w(sd, 0x40 + i, a); reg_w(sd, 0x60 + i, b); } - ret += reg_w(sd, 0x39, 0x0012); /* JPEG encoder enable */ - - return ret; + reg_w(sd, 0x39, 0x0012); /* JPEG encoder enable */ } /**************************************************************************** @@ -168,50 +173,39 @@ static int w9968cf_upload_quantizationtables(struct sd *sd) * i2c_adap_read_byte() * ****************************************************************************/ -static int w9968cf_smbus_start(struct sd *sd) +static void w9968cf_smbus_start(struct sd *sd) { - int ret = 0; - - ret += w9968cf_write_sb(sd, 0x0011); /* SDE=1, SDA=0, SCL=1 */ - ret += w9968cf_write_sb(sd, 0x0010); /* SDE=1, SDA=0, SCL=0 */ - - return ret; + w9968cf_write_sb(sd, 0x0011); /* SDE=1, SDA=0, SCL=1 */ + w9968cf_write_sb(sd, 0x0010); /* SDE=1, SDA=0, SCL=0 */ } -static int w9968cf_smbus_stop(struct sd *sd) +static void w9968cf_smbus_stop(struct sd *sd) { - int ret = 0; - - ret += w9968cf_write_sb(sd, 0x0010); /* SDE=1, SDA=0, SCL=0 */ - ret += w9968cf_write_sb(sd, 0x0011); /* SDE=1, SDA=0, SCL=1 */ - ret += w9968cf_write_sb(sd, 0x0013); /* SDE=1, SDA=1, SCL=1 */ - - return ret; + w9968cf_write_sb(sd, 0x0010); /* SDE=1, SDA=0, SCL=0 */ + w9968cf_write_sb(sd, 0x0011); /* SDE=1, SDA=0, SCL=1 */ + w9968cf_write_sb(sd, 0x0013); /* SDE=1, SDA=1, SCL=1 */ } -static int w9968cf_smbus_write_byte(struct sd *sd, u8 v) +static void w9968cf_smbus_write_byte(struct sd *sd, u8 v) { u8 bit; - int ret = 0, sda; + int sda; for (bit = 0 ; bit < 8 ; bit++) { sda = (v & 0x80) ? 2 : 0; v <<= 1; /* SDE=1, SDA=sda, SCL=0 */ - ret += w9968cf_write_sb(sd, 0x10 | sda); + w9968cf_write_sb(sd, 0x10 | sda); /* SDE=1, SDA=sda, SCL=1 */ - ret += w9968cf_write_sb(sd, 0x11 | sda); + w9968cf_write_sb(sd, 0x11 | sda); /* SDE=1, SDA=sda, SCL=0 */ - ret += w9968cf_write_sb(sd, 0x10 | sda); + w9968cf_write_sb(sd, 0x10 | sda); } - - return ret; } -static int w9968cf_smbus_read_byte(struct sd *sd, u8* v) +static void w9968cf_smbus_read_byte(struct sd *sd, u8 *v) { u8 bit; - int ret = 0; /* No need to ensure SDA is high as we are always called after read_ack which ends with SDA high */ @@ -219,51 +213,40 @@ static int w9968cf_smbus_read_byte(struct sd *sd, u8* v) for (bit = 0 ; bit < 8 ; bit++) { *v <<= 1; /* SDE=1, SDA=1, SCL=1 */ - ret += w9968cf_write_sb(sd, 0x0013); + w9968cf_write_sb(sd, 0x0013); *v |= (w9968cf_read_sb(sd) & 0x0008) ? 1 : 0; /* SDE=1, SDA=1, SCL=0 */ - ret += w9968cf_write_sb(sd, 0x0012); + w9968cf_write_sb(sd, 0x0012); } - - return ret; } -static int w9968cf_smbus_write_nack(struct sd *sd) +static void w9968cf_smbus_write_nack(struct sd *sd) { - int ret = 0; - /* No need to ensure SDA is high as we are always called after read_byte which ends with SDA high */ - ret += w9968cf_write_sb(sd, 0x0013); /* SDE=1, SDA=1, SCL=1 */ - ret += w9968cf_write_sb(sd, 0x0012); /* SDE=1, SDA=1, SCL=0 */ - - return ret; + w9968cf_write_sb(sd, 0x0013); /* SDE=1, SDA=1, SCL=1 */ + w9968cf_write_sb(sd, 0x0012); /* SDE=1, SDA=1, SCL=0 */ } -static int w9968cf_smbus_read_ack(struct sd *sd) +static void w9968cf_smbus_read_ack(struct sd *sd) { - int ret = 0, sda; + int sda; /* Ensure SDA is high before raising clock to avoid a spurious stop */ - ret += w9968cf_write_sb(sd, 0x0012); /* SDE=1, SDA=1, SCL=0 */ - ret += w9968cf_write_sb(sd, 0x0013); /* SDE=1, SDA=1, SCL=1 */ + w9968cf_write_sb(sd, 0x0012); /* SDE=1, SDA=1, SCL=0 */ + w9968cf_write_sb(sd, 0x0013); /* SDE=1, SDA=1, SCL=1 */ sda = w9968cf_read_sb(sd); - ret += w9968cf_write_sb(sd, 0x0012); /* SDE=1, SDA=1, SCL=0 */ - if (sda < 0) - ret += sda; - else if (sda & 0x08) { + w9968cf_write_sb(sd, 0x0012); /* SDE=1, SDA=1, SCL=0 */ + if (sda >= 0 && (sda & 0x08)) { PDEBUG(D_USBI, "Did not receive i2c ACK"); - ret += -1; + sd->gspca_dev.usb_err = -EIO; } - - return ret; } /* SMBus protocol: S Addr Wr [A] Subaddr [A] Value [A] P */ -static int w9968cf_i2c_w(struct sd *sd, u8 reg, u8 value) +static void w9968cf_i2c_w(struct sd *sd, u8 reg, u8 value) { u16* data = (u16 *)sd->gspca_dev.usb_buf; - int ret = 0; data[0] = 0x082f | ((sd->sensor_addr & 0x80) ? 0x1500 : 0x0); data[0] |= (sd->sensor_addr & 0x40) ? 0x4000 : 0x0; @@ -276,7 +259,7 @@ static int w9968cf_i2c_w(struct sd *sd, u8 reg, u8 value) data[3] = 0x1d20 | ((sd->sensor_addr & 0x02) ? 0x0001 : 0x0); data[3] |= (sd->sensor_addr & 0x01) ? 0x0054 : 0x0; - ret += w9968cf_write_fsb(sd, data); + w9968cf_write_fsb(sd, data); data[0] = 0x8208 | ((reg & 0x80) ? 0x0015 : 0x0); data[0] |= (reg & 0x40) ? 0x0540 : 0x0; @@ -290,7 +273,7 @@ static int w9968cf_i2c_w(struct sd *sd, u8 reg, u8 value) data[2] |= (reg & 0x01) ? 0x5400 : 0x0; data[3] = 0x001d; - ret += w9968cf_write_fsb(sd, data); + w9968cf_write_fsb(sd, data); data[0] = 0x8208 | ((value & 0x80) ? 0x0015 : 0x0); data[0] |= (value & 0x40) ? 0x0540 : 0x0; @@ -304,14 +287,9 @@ static int w9968cf_i2c_w(struct sd *sd, u8 reg, u8 value) data[2] |= (value & 0x01) ? 0x5400 : 0x0; data[3] = 0xfe1d; - ret += w9968cf_write_fsb(sd, data); - - if (!ret) - PDEBUG(D_USBO, "i2c 0x%02x -> [0x%02x]", value, reg); - else - PDEBUG(D_ERR, "i2c 0x%02x -> [0x%02x] failed", value, reg); + w9968cf_write_fsb(sd, data); - return ret; + PDEBUG(D_USBO, "i2c 0x%02x -> [0x%02x]", value, reg); } /* SMBus protocol: S Addr Wr [A] Subaddr [A] P S Addr+1 Rd [A] [Value] NA P */ @@ -321,28 +299,28 @@ static int w9968cf_i2c_r(struct sd *sd, u8 reg) u8 value; /* Fast serial bus data control disable */ - ret += w9968cf_write_sb(sd, 0x0013); /* don't change ! */ - - ret += w9968cf_smbus_start(sd); - ret += w9968cf_smbus_write_byte(sd, sd->sensor_addr); - ret += w9968cf_smbus_read_ack(sd); - ret += w9968cf_smbus_write_byte(sd, reg); - ret += w9968cf_smbus_read_ack(sd); - ret += w9968cf_smbus_stop(sd); - ret += w9968cf_smbus_start(sd); - ret += w9968cf_smbus_write_byte(sd, sd->sensor_addr + 1); - ret += w9968cf_smbus_read_ack(sd); - ret += w9968cf_smbus_read_byte(sd, &value); + w9968cf_write_sb(sd, 0x0013); /* don't change ! */ + + w9968cf_smbus_start(sd); + w9968cf_smbus_write_byte(sd, sd->sensor_addr); + w9968cf_smbus_read_ack(sd); + w9968cf_smbus_write_byte(sd, reg); + w9968cf_smbus_read_ack(sd); + w9968cf_smbus_stop(sd); + w9968cf_smbus_start(sd); + w9968cf_smbus_write_byte(sd, sd->sensor_addr + 1); + w9968cf_smbus_read_ack(sd); + w9968cf_smbus_read_byte(sd, &value); /* signal we don't want to read anymore, the v4l1 driver used to send an ack here which is very wrong! (and then fixed the issues this gave by retrying reads) */ - ret += w9968cf_smbus_write_nack(sd); - ret += w9968cf_smbus_stop(sd); + w9968cf_smbus_write_nack(sd); + w9968cf_smbus_stop(sd); /* Fast serial bus data control re-enable */ - ret += w9968cf_write_sb(sd, 0x0030); + w9968cf_write_sb(sd, 0x0030); - if (!ret) { + if (sd->gspca_dev.usb_err >= 0) { ret = value; PDEBUG(D_USBI, "i2c [0x%02X] -> 0x%02X", reg, value); } else @@ -355,29 +333,21 @@ static int w9968cf_i2c_r(struct sd *sd, u8 reg) Turn on the LED on some webcams. A beep should be heard too. Return 0 on success, a negative number otherwise. --------------------------------------------------------------------------*/ -static int w9968cf_configure(struct sd *sd) +static void w9968cf_configure(struct sd *sd) { - int ret = 0; - - ret += reg_w(sd, 0x00, 0xff00); /* power-down */ - ret += reg_w(sd, 0x00, 0xbf17); /* reset everything */ - ret += reg_w(sd, 0x00, 0xbf10); /* normal operation */ - ret += reg_w(sd, 0x01, 0x0010); /* serial bus, SDS high */ - ret += reg_w(sd, 0x01, 0x0000); /* serial bus, SDS low */ - ret += reg_w(sd, 0x01, 0x0010); /* ..high 'beep-beep' */ - ret += reg_w(sd, 0x01, 0x0030); /* Set sda scl to FSB mode */ - - if (ret) - PDEBUG(D_ERR, "Couldn't turn on the LED"); + reg_w(sd, 0x00, 0xff00); /* power-down */ + reg_w(sd, 0x00, 0xbf17); /* reset everything */ + reg_w(sd, 0x00, 0xbf10); /* normal operation */ + reg_w(sd, 0x01, 0x0010); /* serial bus, SDS high */ + reg_w(sd, 0x01, 0x0000); /* serial bus, SDS low */ + reg_w(sd, 0x01, 0x0010); /* ..high 'beep-beep' */ + reg_w(sd, 0x01, 0x0030); /* Set sda scl to FSB mode */ sd->stopped = 1; - - return ret; } -static int w9968cf_init(struct sd *sd) +static void w9968cf_init(struct sd *sd) { - int ret = 0; unsigned long hw_bufsize = sd->sif ? (352 * 288 * 2) : (640 * 480 * 2), y0 = 0x0000, u0 = y0 + hw_bufsize / 2, @@ -386,43 +356,41 @@ static int w9968cf_init(struct sd *sd) u1 = y1 + hw_bufsize / 2, v1 = u1 + hw_bufsize / 4; - ret += reg_w(sd, 0x00, 0xff00); /* power off */ - ret += reg_w(sd, 0x00, 0xbf10); /* power on */ - - ret += reg_w(sd, 0x03, 0x405d); /* DRAM timings */ - ret += reg_w(sd, 0x04, 0x0030); /* SDRAM timings */ + reg_w(sd, 0x00, 0xff00); /* power off */ + reg_w(sd, 0x00, 0xbf10); /* power on */ - ret += reg_w(sd, 0x20, y0 & 0xffff); /* Y buf.0, low */ - ret += reg_w(sd, 0x21, y0 >> 16); /* Y buf.0, high */ - ret += reg_w(sd, 0x24, u0 & 0xffff); /* U buf.0, low */ - ret += reg_w(sd, 0x25, u0 >> 16); /* U buf.0, high */ - ret += reg_w(sd, 0x28, v0 & 0xffff); /* V buf.0, low */ - ret += reg_w(sd, 0x29, v0 >> 16); /* V buf.0, high */ + reg_w(sd, 0x03, 0x405d); /* DRAM timings */ + reg_w(sd, 0x04, 0x0030); /* SDRAM timings */ - ret += reg_w(sd, 0x22, y1 & 0xffff); /* Y buf.1, low */ - ret += reg_w(sd, 0x23, y1 >> 16); /* Y buf.1, high */ - ret += reg_w(sd, 0x26, u1 & 0xffff); /* U buf.1, low */ - ret += reg_w(sd, 0x27, u1 >> 16); /* U buf.1, high */ - ret += reg_w(sd, 0x2a, v1 & 0xffff); /* V buf.1, low */ - ret += reg_w(sd, 0x2b, v1 >> 16); /* V buf.1, high */ + reg_w(sd, 0x20, y0 & 0xffff); /* Y buf.0, low */ + reg_w(sd, 0x21, y0 >> 16); /* Y buf.0, high */ + reg_w(sd, 0x24, u0 & 0xffff); /* U buf.0, low */ + reg_w(sd, 0x25, u0 >> 16); /* U buf.0, high */ + reg_w(sd, 0x28, v0 & 0xffff); /* V buf.0, low */ + reg_w(sd, 0x29, v0 >> 16); /* V buf.0, high */ - ret += reg_w(sd, 0x32, y1 & 0xffff); /* JPEG buf 0 low */ - ret += reg_w(sd, 0x33, y1 >> 16); /* JPEG buf 0 high */ + reg_w(sd, 0x22, y1 & 0xffff); /* Y buf.1, low */ + reg_w(sd, 0x23, y1 >> 16); /* Y buf.1, high */ + reg_w(sd, 0x26, u1 & 0xffff); /* U buf.1, low */ + reg_w(sd, 0x27, u1 >> 16); /* U buf.1, high */ + reg_w(sd, 0x2a, v1 & 0xffff); /* V buf.1, low */ + reg_w(sd, 0x2b, v1 >> 16); /* V buf.1, high */ - ret += reg_w(sd, 0x34, y1 & 0xffff); /* JPEG buf 1 low */ - ret += reg_w(sd, 0x35, y1 >> 16); /* JPEG bug 1 high */ + reg_w(sd, 0x32, y1 & 0xffff); /* JPEG buf 0 low */ + reg_w(sd, 0x33, y1 >> 16); /* JPEG buf 0 high */ - ret += reg_w(sd, 0x36, 0x0000);/* JPEG restart interval */ - ret += reg_w(sd, 0x37, 0x0804);/*JPEG VLE FIFO threshold*/ - ret += reg_w(sd, 0x38, 0x0000);/* disable hw up-scaling */ - ret += reg_w(sd, 0x3f, 0x0000); /* JPEG/MCTL test data */ + reg_w(sd, 0x34, y1 & 0xffff); /* JPEG buf 1 low */ + reg_w(sd, 0x35, y1 >> 16); /* JPEG bug 1 high */ - return ret; + reg_w(sd, 0x36, 0x0000);/* JPEG restart interval */ + reg_w(sd, 0x37, 0x0804);/*JPEG VLE FIFO threshold*/ + reg_w(sd, 0x38, 0x0000);/* disable hw up-scaling */ + reg_w(sd, 0x3f, 0x0000); /* JPEG/MCTL test data */ } -static int w9968cf_set_crop_window(struct sd *sd) +static void w9968cf_set_crop_window(struct sd *sd) { - int ret = 0, start_cropx, start_cropy, x, y, fw, fh, cw, ch, + int start_cropx, start_cropy, x, y, fw, fh, cw, ch, max_width, max_height; if (sd->sif) { @@ -464,42 +432,40 @@ static int w9968cf_set_crop_window(struct sd *sd) x = (max_width - cw) / 2; y = (max_height - ch) / 2; - ret += reg_w(sd, 0x10, start_cropx + x); - ret += reg_w(sd, 0x11, start_cropy + y); - ret += reg_w(sd, 0x12, start_cropx + x + cw); - ret += reg_w(sd, 0x13, start_cropy + y + ch); - - return ret; + reg_w(sd, 0x10, start_cropx + x); + reg_w(sd, 0x11, start_cropy + y); + reg_w(sd, 0x12, start_cropx + x + cw); + reg_w(sd, 0x13, start_cropy + y + ch); } -static int w9968cf_mode_init_regs(struct sd *sd) +static void w9968cf_mode_init_regs(struct sd *sd) { - int ret = 0, val, vs_polarity, hs_polarity; + int val, vs_polarity, hs_polarity; - ret += w9968cf_set_crop_window(sd); + w9968cf_set_crop_window(sd); - ret += reg_w(sd, 0x14, sd->gspca_dev.width); - ret += reg_w(sd, 0x15, sd->gspca_dev.height); + reg_w(sd, 0x14, sd->gspca_dev.width); + reg_w(sd, 0x15, sd->gspca_dev.height); /* JPEG width & height */ - ret += reg_w(sd, 0x30, sd->gspca_dev.width); - ret += reg_w(sd, 0x31, sd->gspca_dev.height); + reg_w(sd, 0x30, sd->gspca_dev.width); + reg_w(sd, 0x31, sd->gspca_dev.height); /* Y & UV frame buffer strides (in WORD) */ if (w9968cf_vga_mode[sd->gspca_dev.curr_mode].pixelformat == V4L2_PIX_FMT_JPEG) { - ret += reg_w(sd, 0x2c, sd->gspca_dev.width / 2); - ret += reg_w(sd, 0x2d, sd->gspca_dev.width / 4); + reg_w(sd, 0x2c, sd->gspca_dev.width / 2); + reg_w(sd, 0x2d, sd->gspca_dev.width / 4); } else - ret += reg_w(sd, 0x2c, sd->gspca_dev.width); + reg_w(sd, 0x2c, sd->gspca_dev.width); - ret += reg_w(sd, 0x00, 0xbf17); /* reset everything */ - ret += reg_w(sd, 0x00, 0xbf10); /* normal operation */ + reg_w(sd, 0x00, 0xbf17); /* reset everything */ + reg_w(sd, 0x00, 0xbf10); /* normal operation */ /* Transfer size in WORDS (for UYVY format only) */ val = sd->gspca_dev.width * sd->gspca_dev.height; - ret += reg_w(sd, 0x3d, val & 0xffff); /* low bits */ - ret += reg_w(sd, 0x3e, val >> 16); /* high bits */ + reg_w(sd, 0x3d, val & 0xffff); /* low bits */ + reg_w(sd, 0x3e, val >> 16); /* high bits */ if (w9968cf_vga_mode[sd->gspca_dev.curr_mode].pixelformat == V4L2_PIX_FMT_JPEG) { @@ -507,7 +473,7 @@ static int w9968cf_mode_init_regs(struct sd *sd) jpeg_define(sd->jpeg_hdr, sd->gspca_dev.height, sd->gspca_dev.width, 0x22); /* JPEG 420 */ jpeg_set_qual(sd->jpeg_hdr, sd->quality); - ret += w9968cf_upload_quantizationtables(sd); + w9968cf_upload_quantizationtables(sd); } /* Video Capture Control Register */ @@ -539,11 +505,9 @@ static int w9968cf_mode_init_regs(struct sd *sd) val |= 0x8000; /* capt. enable */ - ret += reg_w(sd, 0x16, val); + reg_w(sd, 0x16, val); sd->gspca_dev.empty_packet = 0; - - return ret; } static void w9968cf_stop0(struct sd *sd) |
