From: Márton Németh <nm127@xxxxxxxxxxx> Add debug register write interface to pac7302 to be able to set for example the edge detect mode (bit 2 register 0x55) or the test pattern (bit 0..3, register 0x72) and test overlay (bit 4, register 0x72) from the user space. Only write of register page 0 is supported by this patch. The patch was tested together with Labtec Webcam 2200 (USB ID 093a:2626). Signed-off-by: Márton Németh <nm127@xxxxxxxxxxx> --- The patch is based on 13335:3fd924da7091 from http://linuxtv.org/hg/~jfrancois/gspca/ . --- diff -r 3fd924da7091 linux/drivers/media/video/gspca/pac7302.c --- a/linux/drivers/media/video/gspca/pac7302.c Sun Nov 08 08:41:28 2009 +0100 +++ b/linux/drivers/media/video/gspca/pac7302.c Sun Nov 08 23:21:51 2009 +0100 @@ -68,6 +68,7 @@ #define MODULE_NAME "pac7302" +#include <media/v4l2-chip-ident.h> #include "gspca.h" MODULE_AUTHOR("Thomas Kaiser thomas@xxxxxxxxxxxxxxx"); @@ -1164,6 +1165,55 @@ return 0; } +#ifdef CONFIG_VIDEO_ADV_DEBUG +static int sd_dbg_s_register(struct gspca_dev *gspca_dev, + struct v4l2_dbg_register *reg) +{ + int ret = -EINVAL; + __u8 index; + __u8 value; + + /* reg->reg: bit0..15: reserved for register index (wIndex is 16bit + long on the USB bus) + */ + if (reg->match.type == V4L2_CHIP_MATCH_HOST && + reg->match.addr == 0 && + (reg->reg < 0x000000ff) && + (reg->val <= 0x000000ff) + ) { + /* Currently writing to page 0 is only supported. */ + /* reg_w() only supports 8bit index */ + index = reg->reg & 0x000000ff; + value = reg->val & 0x000000ff; + + /* Note that there shall be no access to other page + by any other function between the page swith and + the actual register write */ + ret = reg_w(gspca_dev, 0xff, 0x00); /* page 0 */ + if (0 <= ret) + ret = reg_w(gspca_dev, index, value); + + if (0 <= ret) + ret = reg_w(gspca_dev, 0xdc, 0x01); + } + return ret; +} + +static int sd_chip_ident(struct gspca_dev *gspca_dev, + struct v4l2_dbg_chip_ident *chip) +{ + int ret = -EINVAL; + + if (chip->match.type == V4L2_CHIP_MATCH_HOST && + chip->match.addr == 0) { + chip->revision = 0; + chip->ident = V4L2_IDENT_UNKNOWN; + ret = 0; + } + return ret; +} +#endif + /* sub-driver description for pac7302 */ static struct sd_desc sd_desc = { .name = MODULE_NAME, @@ -1176,6 +1226,10 @@ .stop0 = sd_stop0, .pkt_scan = sd_pkt_scan, .dq_callback = do_autogain, +#ifdef CONFIG_VIDEO_ADV_DEBUG + .set_register = sd_dbg_s_register, + .get_chip_ident = sd_chip_ident, +#endif }; /* -- module initialisation -- */ -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
