From 14799f6cf35f843806019f548e80ffa669d16102 Mon Sep 17 00:00:00 2001 From: Jean-Francois Moine Date: Wed, 13 Jan 2010 15:28:22 -0300 Subject: [PATCH] V4L/DVB: gspca - pac7311: Use usb_err to propagate USB errors Signed-off-by: Jean-Francois Moine Signed-off-by: Mauro Carvalho Chehab --- drivers/media/video/gspca/pac7311.c | 206 ++++++++++++++---------------------- 1 file changed, 81 insertions(+), 125 deletions(-) diff --git a/drivers/media/video/gspca/pac7311.c b/drivers/media/video/gspca/pac7311.c index a9f195e..ba73eb8 100644 --- a/drivers/media/video/gspca/pac7311.c +++ b/drivers/media/video/gspca/pac7311.c @@ -258,12 +258,14 @@ static const __u8 page4_7311[] = { 0x23, 0x28, 0x04, 0x11, 0x00, 0x00 }; -static int reg_w_buf(struct gspca_dev *gspca_dev, +static void reg_w_buf(struct gspca_dev *gspca_dev, __u8 index, const char *buffer, int len) { int ret; + if (gspca_dev->usb_err < 0) + return; memcpy(gspca_dev->usb_buf, buffer, len); ret = usb_control_msg(gspca_dev->dev, usb_sndctrlpipe(gspca_dev->dev, 0), @@ -272,20 +274,23 @@ static int reg_w_buf(struct gspca_dev *gspca_dev, 0, /* value */ index, gspca_dev->usb_buf, len, 500); - if (ret < 0) + if (ret < 0) { PDEBUG(D_ERR, "reg_w_buf(): " "Failed to write registers to index 0x%x, error %i", index, ret); - return ret; + gspca_dev->usb_err = ret; + } } -static int reg_w(struct gspca_dev *gspca_dev, +static void reg_w(struct gspca_dev *gspca_dev, __u8 index, __u8 value) { int ret; + if (gspca_dev->usb_err < 0) + return; gspca_dev->usb_buf[0] = value; ret = usb_control_msg(gspca_dev->dev, usb_sndctrlpipe(gspca_dev->dev, 0), @@ -293,32 +298,32 @@ static int reg_w(struct gspca_dev *gspca_dev, USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE, 0, index, gspca_dev->usb_buf, 1, 500); - if (ret < 0) + if (ret < 0) { PDEBUG(D_ERR, "reg_w(): " "Failed to write register to index 0x%x, value 0x%x, error %i", index, value, ret); - return ret; + gspca_dev->usb_err = ret; + } } -static int reg_w_seq(struct gspca_dev *gspca_dev, +static void reg_w_seq(struct gspca_dev *gspca_dev, const __u8 *seq, int len) { - int ret = 0; while (--len >= 0) { - if (0 <= ret) - ret = reg_w(gspca_dev, seq[0], seq[1]); + reg_w(gspca_dev, seq[0], seq[1]); seq += 2; } - return ret; } /* load the beginning of a page */ -static int reg_w_page(struct gspca_dev *gspca_dev, +static void reg_w_page(struct gspca_dev *gspca_dev, const __u8 *page, int len) { int index; int ret = 0; + if (gspca_dev->usb_err < 0) + return; for (index = 0; index < len; index++) { if (page[index] == SKIP) /* skip this index */ continue; @@ -334,52 +339,47 @@ static int reg_w_page(struct gspca_dev *gspca_dev, "Failed to write register to index 0x%x, " "value 0x%x, error %i", index, page[index], ret); + gspca_dev->usb_err = ret; break; } } - return ret; } /* output a variable sequence */ -static int reg_w_var(struct gspca_dev *gspca_dev, +static void reg_w_var(struct gspca_dev *gspca_dev, const __u8 *seq, const __u8 *page4, unsigned int page4_len) { int index, len; - int ret = 0; for (;;) { index = *seq++; len = *seq++; switch (len) { case END_OF_SEQUENCE: - return ret; + return; case LOAD_PAGE4: - ret = reg_w_page(gspca_dev, page4, page4_len); + reg_w_page(gspca_dev, page4, page4_len); break; default: if (len > USB_BUF_SZ) { PDEBUG(D_ERR|D_STREAM, "Incorrect variable sequence"); - return -EINVAL; + return; } while (len > 0) { if (len < 8) { - ret = reg_w_buf(gspca_dev, + reg_w_buf(gspca_dev, index, seq, len); - if (ret < 0) - return ret; seq += len; break; } - ret = reg_w_buf(gspca_dev, index, seq, 8); + reg_w_buf(gspca_dev, index, seq, 8); seq += 8; index += 8; len -= 8; } } - if (ret < 0) - return ret; } /* not reached */ } @@ -407,46 +407,36 @@ static int sd_config(struct gspca_dev *gspca_dev, } /* This function is used by pac7311 only */ -static int setcontrast(struct gspca_dev *gspca_dev) +static void setcontrast(struct gspca_dev *gspca_dev) { struct sd *sd = (struct sd *) gspca_dev; - int ret; - ret = reg_w(gspca_dev, 0xff, 0x04); - if (0 <= ret) - ret = reg_w(gspca_dev, 0x10, sd->contrast >> 4); + reg_w(gspca_dev, 0xff, 0x04); + reg_w(gspca_dev, 0x10, sd->contrast >> 4); /* load registers to sensor (Bit 0, auto clear) */ - if (0 <= ret) - ret = reg_w(gspca_dev, 0x11, 0x01); - return ret; + reg_w(gspca_dev, 0x11, 0x01); } -static int setgain(struct gspca_dev *gspca_dev) +static void setgain(struct gspca_dev *gspca_dev) { struct sd *sd = (struct sd *) gspca_dev; int gain = GAIN_MAX - sd->gain; - int ret; if (gain < 1) gain = 1; else if (gain > 245) gain = 245; - ret = reg_w(gspca_dev, 0xff, 0x04); /* page 4 */ - if (0 <= ret) - ret = reg_w(gspca_dev, 0x0e, 0x00); - if (0 <= ret) - ret = reg_w(gspca_dev, 0x0f, gain); + reg_w(gspca_dev, 0xff, 0x04); /* page 4 */ + reg_w(gspca_dev, 0x0e, 0x00); + reg_w(gspca_dev, 0x0f, gain); /* load registers to sensor (Bit 0, auto clear) */ - if (0 <= ret) - ret = reg_w(gspca_dev, 0x11, 0x01); - return ret; + reg_w(gspca_dev, 0x11, 0x01); } -static int setexposure(struct gspca_dev *gspca_dev) +static void setexposure(struct gspca_dev *gspca_dev) { struct sd *sd = (struct sd *) gspca_dev; - int ret; __u8 reg; /* register 2 of frame 3/4 contains the clock divider configuring the @@ -458,93 +448,72 @@ static int setexposure(struct gspca_dev *gspca_dev) else if (reg > 63) reg = 63; - ret = reg_w(gspca_dev, 0xff, 0x04); /* page 4 */ - if (0 <= ret) - ret = reg_w(gspca_dev, 0x02, reg); + reg_w(gspca_dev, 0xff, 0x04); /* page 4 */ + reg_w(gspca_dev, 0x02, reg); + /* Page 1 register 8 must always be 0x08 except when not in 640x480 mode and Page3/4 reg 2 <= 3 then it must be 9 */ - if (0 <= ret) - ret = reg_w(gspca_dev, 0xff, 0x01); + reg_w(gspca_dev, 0xff, 0x01); if (gspca_dev->cam.cam_mode[(int)gspca_dev->curr_mode].priv && reg <= 3) { - if (0 <= ret) - ret = reg_w(gspca_dev, 0x08, 0x09); + reg_w(gspca_dev, 0x08, 0x09); } else { - if (0 <= ret) - ret = reg_w(gspca_dev, 0x08, 0x08); + reg_w(gspca_dev, 0x08, 0x08); } /* load registers to sensor (Bit 0, auto clear) */ - if (0 <= ret) - ret = reg_w(gspca_dev, 0x11, 0x01); - return ret; + reg_w(gspca_dev, 0x11, 0x01); } -static int sethvflip(struct gspca_dev *gspca_dev) +static void sethvflip(struct gspca_dev *gspca_dev) { struct sd *sd = (struct sd *) gspca_dev; - int ret; __u8 data; - ret = reg_w(gspca_dev, 0xff, 0x04); /* page 4 */ + reg_w(gspca_dev, 0xff, 0x04); /* page 4 */ data = (sd->hflip ? 0x04 : 0x00) | (sd->vflip ? 0x08 : 0x00); - if (0 <= ret) - ret = reg_w(gspca_dev, 0x21, data); + reg_w(gspca_dev, 0x21, data); + /* load registers to sensor (Bit 0, auto clear) */ - if (0 <= ret) - ret = reg_w(gspca_dev, 0x11, 0x01); - return ret; + reg_w(gspca_dev, 0x11, 0x01); } /* this function is called at probe and resume time for pac7311 */ static int sd_init(struct gspca_dev *gspca_dev) { - return reg_w_seq(gspca_dev, init_7311, sizeof(init_7311)/2); + reg_w_seq(gspca_dev, init_7311, sizeof(init_7311)/2); + return gspca_dev->usb_err; } static int sd_start(struct gspca_dev *gspca_dev) { struct sd *sd = (struct sd *) gspca_dev; - int ret; sd->sof_read = 0; - ret = reg_w_var(gspca_dev, start_7311, + reg_w_var(gspca_dev, start_7311, page4_7311, sizeof(page4_7311)); - if (0 <= ret) - ret = setcontrast(gspca_dev); - if (0 <= ret) - ret = setgain(gspca_dev); - if (0 <= ret) - ret = setexposure(gspca_dev); - if (0 <= ret) - ret = sethvflip(gspca_dev); + setcontrast(gspca_dev); + setgain(gspca_dev); + setexposure(gspca_dev); + sethvflip(gspca_dev); /* set correct resolution */ switch (gspca_dev->cam.cam_mode[(int) gspca_dev->curr_mode].priv) { case 2: /* 160x120 pac7311 */ - if (0 <= ret) - ret = reg_w(gspca_dev, 0xff, 0x01); - if (0 <= ret) - ret = reg_w(gspca_dev, 0x17, 0x20); - if (0 <= ret) - ret = reg_w(gspca_dev, 0x87, 0x10); + reg_w(gspca_dev, 0xff, 0x01); + reg_w(gspca_dev, 0x17, 0x20); + reg_w(gspca_dev, 0x87, 0x10); break; case 1: /* 320x240 pac7311 */ - if (0 <= ret) - ret = reg_w(gspca_dev, 0xff, 0x01); - if (0 <= ret) - ret = reg_w(gspca_dev, 0x17, 0x30); - if (0 <= ret) - ret = reg_w(gspca_dev, 0x87, 0x11); + reg_w(gspca_dev, 0xff, 0x01); + reg_w(gspca_dev, 0x17, 0x30); + reg_w(gspca_dev, 0x87, 0x11); break; case 0: /* 640x480 */ - if (0 <= ret) - ret = reg_w(gspca_dev, 0xff, 0x01); - if (0 <= ret) - ret = reg_w(gspca_dev, 0x17, 0x00); - if (0 <= ret) - ret = reg_w(gspca_dev, 0x87, 0x12); + reg_w(gspca_dev, 0xff, 0x01); + reg_w(gspca_dev, 0x17, 0x00); + reg_w(gspca_dev, 0x87, 0x12); break; } @@ -553,37 +522,24 @@ static int sd_start(struct gspca_dev *gspca_dev) atomic_set(&sd->avg_lum, -1); /* start stream */ - if (0 <= ret) - ret = reg_w(gspca_dev, 0xff, 0x01); - if (0 <= ret) - ret = reg_w(gspca_dev, 0x78, 0x05); + reg_w(gspca_dev, 0xff, 0x01); + reg_w(gspca_dev, 0x78, 0x05); - return ret; + return gspca_dev->usb_err; } static void sd_stopN(struct gspca_dev *gspca_dev) { - int ret; - - ret = reg_w(gspca_dev, 0xff, 0x04); - if (0 <= ret) - ret = reg_w(gspca_dev, 0x27, 0x80); - if (0 <= ret) - ret = reg_w(gspca_dev, 0x28, 0xca); - if (0 <= ret) - ret = reg_w(gspca_dev, 0x29, 0x53); - if (0 <= ret) - ret = reg_w(gspca_dev, 0x2a, 0x0e); - if (0 <= ret) - ret = reg_w(gspca_dev, 0xff, 0x01); - if (0 <= ret) - ret = reg_w(gspca_dev, 0x3e, 0x20); - if (0 <= ret) - ret = reg_w(gspca_dev, 0x78, 0x44); /* Bit_0=start stream, Bit_6=LED */ - if (0 <= ret) - ret = reg_w(gspca_dev, 0x78, 0x44); /* Bit_0=start stream, Bit_6=LED */ - if (0 <= ret) - ret = reg_w(gspca_dev, 0x78, 0x44); /* Bit_0=start stream, Bit_6=LED */ + reg_w(gspca_dev, 0xff, 0x04); + reg_w(gspca_dev, 0x27, 0x80); + reg_w(gspca_dev, 0x28, 0xca); + reg_w(gspca_dev, 0x29, 0x53); + reg_w(gspca_dev, 0x2a, 0x0e); + reg_w(gspca_dev, 0xff, 0x01); + reg_w(gspca_dev, 0x3e, 0x20); + reg_w(gspca_dev, 0x78, 0x44); /* Bit_0=start stream, Bit_6=LED */ + reg_w(gspca_dev, 0x78, 0x44); /* Bit_0=start stream, Bit_6=LED */ + reg_w(gspca_dev, 0x78, 0x44); /* Bit_0=start stream, Bit_6=LED */ } /* called on streamoff with alt 0 and on disconnect for 7311 */ @@ -728,7 +684,7 @@ static int sd_setcontrast(struct gspca_dev *gspca_dev, __s32 val) if (gspca_dev->streaming) { setcontrast(gspca_dev); } - return 0; + return gspca_dev->usb_err; } static int sd_getcontrast(struct gspca_dev *gspca_dev, __s32 *val) @@ -746,7 +702,7 @@ static int sd_setgain(struct gspca_dev *gspca_dev, __s32 val) sd->gain = val; if (gspca_dev->streaming) setgain(gspca_dev); - return 0; + return gspca_dev->usb_err; } static int sd_getgain(struct gspca_dev *gspca_dev, __s32 *val) @@ -764,7 +720,7 @@ static int sd_setexposure(struct gspca_dev *gspca_dev, __s32 val) sd->exposure = val; if (gspca_dev->streaming) setexposure(gspca_dev); - return 0; + return gspca_dev->usb_err; } static int sd_getexposure(struct gspca_dev *gspca_dev, __s32 *val) @@ -795,7 +751,7 @@ static int sd_setautogain(struct gspca_dev *gspca_dev, __s32 val) } } - return 0; + return gspca_dev->usb_err; } static int sd_getautogain(struct gspca_dev *gspca_dev, __s32 *val) @@ -813,7 +769,7 @@ static int sd_sethflip(struct gspca_dev *gspca_dev, __s32 val) sd->hflip = val; if (gspca_dev->streaming) sethvflip(gspca_dev); - return 0; + return gspca_dev->usb_err; } static int sd_gethflip(struct gspca_dev *gspca_dev, __s32 *val) @@ -831,7 +787,7 @@ static int sd_setvflip(struct gspca_dev *gspca_dev, __s32 val) sd->vflip = val; if (gspca_dev->streaming) sethvflip(gspca_dev); - return 0; + return gspca_dev->usb_err; } static int sd_getvflip(struct gspca_dev *gspca_dev, __s32 *val) -- 2.7.4