diff options
Diffstat (limited to 'drivers/media/video/gspca/pac7311.c')
-rw-r--r-- | drivers/media/video/gspca/pac7311.c | 161 |
1 files changed, 105 insertions, 56 deletions
diff --git a/drivers/media/video/gspca/pac7311.c b/drivers/media/video/gspca/pac7311.c index b1127d948974..c3e1f80351ad 100644 --- a/drivers/media/video/gspca/pac7311.c +++ b/drivers/media/video/gspca/pac7311.c @@ -259,7 +259,7 @@ static const __u8 page4_7311[] = { 0x23, 0x28, 0x04, 0x11, 0x00, 0x00 }; -static void reg_w_buf(struct gspca_dev *gspca_dev, +static int reg_w_buf(struct gspca_dev *gspca_dev, __u8 index, const char *buffer, int len) { @@ -277,10 +277,11 @@ static void reg_w_buf(struct gspca_dev *gspca_dev, PDEBUG(D_ERR, "reg_w_buf(): " "Failed to write registers to index 0x%x, error %i", index, ret); + return ret; } -static void reg_w(struct gspca_dev *gspca_dev, +static int reg_w(struct gspca_dev *gspca_dev, __u8 index, __u8 value) { @@ -297,23 +298,27 @@ static void reg_w(struct gspca_dev *gspca_dev, PDEBUG(D_ERR, "reg_w(): " "Failed to write register to index 0x%x, value 0x%x, error %i", index, value, ret); + return ret; } -static void reg_w_seq(struct gspca_dev *gspca_dev, +static int reg_w_seq(struct gspca_dev *gspca_dev, const __u8 *seq, int len) { + int ret = 0; while (--len >= 0) { - reg_w(gspca_dev, seq[0], seq[1]); + if (0 <= ret) + ret = reg_w(gspca_dev, seq[0], seq[1]); seq += 2; } + return ret; } /* load the beginning of a page */ -static void reg_w_page(struct gspca_dev *gspca_dev, +static int reg_w_page(struct gspca_dev *gspca_dev, const __u8 *page, int len) { int index; - int ret; + int ret = 0; for (index = 0; index < len; index++) { if (page[index] == SKIP) /* skip this index */ @@ -325,52 +330,61 @@ static void reg_w_page(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_page(): " "Failed to write register to index 0x%x, " "value 0x%x, error %i", index, page[index], ret); + break; + } } + return ret; } /* output a variable sequence */ -static void reg_w_var(struct gspca_dev *gspca_dev, +static int reg_w_var(struct gspca_dev *gspca_dev, const __u8 *seq, const __u8 *page3, unsigned int page3_len, 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; + return ret; case LOAD_PAGE4: - reg_w_page(gspca_dev, page4, page4_len); + ret = reg_w_page(gspca_dev, page4, page4_len); break; case LOAD_PAGE3: - reg_w_page(gspca_dev, page3, page3_len); + ret = reg_w_page(gspca_dev, page3, page3_len); break; default: if (len > USB_BUF_SZ) { PDEBUG(D_ERR|D_STREAM, "Incorrect variable sequence"); - return; + return -EINVAL; } while (len > 0) { if (len < 8) { - reg_w_buf(gspca_dev, index, seq, len); + ret = reg_w_buf(gspca_dev, + index, seq, len); + if (ret < 0) + return ret; seq += len; break; } - reg_w_buf(gspca_dev, index, seq, 8); + ret = reg_w_buf(gspca_dev, index, seq, 8); seq += 8; index += 8; len -= 8; } } + if (ret < 0) + return ret; } /* not reached */ } @@ -398,36 +412,46 @@ static int sd_config(struct gspca_dev *gspca_dev, } /* This function is used by pac7311 only */ -static void setcontrast(struct gspca_dev *gspca_dev) +static int setcontrast(struct gspca_dev *gspca_dev) { struct sd *sd = (struct sd *) gspca_dev; + int ret; - reg_w(gspca_dev, 0xff, 0x04); - reg_w(gspca_dev, 0x10, sd->contrast >> 4); + ret = reg_w(gspca_dev, 0xff, 0x04); + if (0 <= ret) + ret = reg_w(gspca_dev, 0x10, sd->contrast >> 4); /* load registers to sensor (Bit 0, auto clear) */ - reg_w(gspca_dev, 0x11, 0x01); + if (0 <= ret) + ret = reg_w(gspca_dev, 0x11, 0x01); + return ret; } -static void setgain(struct gspca_dev *gspca_dev) +static int 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; - reg_w(gspca_dev, 0xff, 0x04); /* page 4 */ - reg_w(gspca_dev, 0x0e, 0x00); - reg_w(gspca_dev, 0x0f, gain); + 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); /* load registers to sensor (Bit 0, auto clear) */ - reg_w(gspca_dev, 0x11, 0x01); + if (0 <= ret) + ret = reg_w(gspca_dev, 0x11, 0x01); + return ret; } -static void setexposure(struct gspca_dev *gspca_dev) +static int 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 @@ -439,71 +463,94 @@ static void setexposure(struct gspca_dev *gspca_dev) else if (reg > 63) reg = 63; - reg_w(gspca_dev, 0xff, 0x04); /* page 4 */ - reg_w(gspca_dev, 0x02, reg); + ret = reg_w(gspca_dev, 0xff, 0x04); /* page 4 */ + if (0 <= ret) + ret = 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 */ - reg_w(gspca_dev, 0xff, 0x01); + if (0 <= ret) + ret = reg_w(gspca_dev, 0xff, 0x01); if (gspca_dev->cam.cam_mode[(int)gspca_dev->curr_mode].priv && - reg <= 3) - reg_w(gspca_dev, 0x08, 0x09); - else - reg_w(gspca_dev, 0x08, 0x08); + reg <= 3) { + if (0 <= ret) + ret = reg_w(gspca_dev, 0x08, 0x09); + } else { + if (0 <= ret) + ret = reg_w(gspca_dev, 0x08, 0x08); + } /* load registers to sensor (Bit 0, auto clear) */ - reg_w(gspca_dev, 0x11, 0x01); + if (0 <= ret) + ret = reg_w(gspca_dev, 0x11, 0x01); + return ret; } -static void sethvflip(struct gspca_dev *gspca_dev) +static int sethvflip(struct gspca_dev *gspca_dev) { struct sd *sd = (struct sd *) gspca_dev; + int ret; __u8 data; - reg_w(gspca_dev, 0xff, 0x04); /* page 4 */ + ret = reg_w(gspca_dev, 0xff, 0x04); /* page 4 */ data = (sd->hflip ? 0x04 : 0x00) | (sd->vflip ? 0x08 : 0x00); - reg_w(gspca_dev, 0x21, data); + if (0 <= ret) + ret = reg_w(gspca_dev, 0x21, data); /* load registers to sensor (Bit 0, auto clear) */ - reg_w(gspca_dev, 0x11, 0x01); + if (0 <= ret) + ret = reg_w(gspca_dev, 0x11, 0x01); + return ret; } /* this function is called at probe and resume time for pac7311 */ static int sd_init(struct gspca_dev *gspca_dev) { - reg_w_seq(gspca_dev, init_7311, sizeof(init_7311)/2); - - return 0; + return reg_w_seq(gspca_dev, init_7311, sizeof(init_7311)/2); } static int sd_start(struct gspca_dev *gspca_dev) { struct sd *sd = (struct sd *) gspca_dev; + int ret; sd->sof_read = 0; - reg_w_var(gspca_dev, start_7311, + ret = reg_w_var(gspca_dev, start_7311, NULL, 0, page4_7311, sizeof(page4_7311)); - setcontrast(gspca_dev); - setgain(gspca_dev); - setexposure(gspca_dev); - sethvflip(gspca_dev); + 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); /* set correct resolution */ switch (gspca_dev->cam.cam_mode[(int) gspca_dev->curr_mode].priv) { case 2: /* 160x120 pac7311 */ - reg_w(gspca_dev, 0xff, 0x01); - reg_w(gspca_dev, 0x17, 0x20); - reg_w(gspca_dev, 0x87, 0x10); + 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); break; case 1: /* 320x240 pac7311 */ - reg_w(gspca_dev, 0xff, 0x01); - reg_w(gspca_dev, 0x17, 0x30); - reg_w(gspca_dev, 0x87, 0x11); + 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); break; case 0: /* 640x480 */ - reg_w(gspca_dev, 0xff, 0x01); - reg_w(gspca_dev, 0x17, 0x00); - reg_w(gspca_dev, 0x87, 0x12); + 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); break; } @@ -512,10 +559,12 @@ static int sd_start(struct gspca_dev *gspca_dev) atomic_set(&sd->avg_lum, -1); /* start stream */ - reg_w(gspca_dev, 0xff, 0x01); - reg_w(gspca_dev, 0x78, 0x05); + if (0 <= ret) + ret = reg_w(gspca_dev, 0xff, 0x01); + if (0 <= ret) + ret = reg_w(gspca_dev, 0x78, 0x05); - return 0; + return ret; } static void sd_stopN(struct gspca_dev *gspca_dev) |