diff options
Diffstat (limited to 'drivers/media/video/gspca/stv06xx/stv06xx.c')
| -rw-r--r-- | drivers/media/video/gspca/stv06xx/stv06xx.c | 57 |
1 files changed, 55 insertions, 2 deletions
diff --git a/drivers/media/video/gspca/stv06xx/stv06xx.c b/drivers/media/video/gspca/stv06xx/stv06xx.c index 086de44a6e57..28ea4175b80e 100644 --- a/drivers/media/video/gspca/stv06xx/stv06xx.c +++ b/drivers/media/video/gspca/stv06xx/stv06xx.c @@ -263,7 +263,21 @@ static int stv06xx_init(struct gspca_dev *gspca_dev) static int stv06xx_start(struct gspca_dev *gspca_dev) { struct sd *sd = (struct sd *) gspca_dev; - int err; + struct usb_host_interface *alt; + struct usb_interface *intf; + int err, packet_size; + + intf = usb_ifnum_to_if(sd->gspca_dev.dev, sd->gspca_dev.iface); + alt = usb_altnum_to_altsetting(intf, sd->gspca_dev.alt); + if (!alt) { + PDEBUG(D_ERR, "Couldn't get altsetting"); + return -EIO; + } + + packet_size = le16_to_cpu(alt->endpoint[0].desc.wMaxPacketSize); + err = stv06xx_write_bridge(sd, STV_ISO_SIZE_L, packet_size); + if (err < 0) + return err; /* Prepare the sensor for start */ err = sd->sensor->start(sd); @@ -282,6 +296,43 @@ out: return (err < 0) ? err : 0; } +static int stv06xx_isoc_init(struct gspca_dev *gspca_dev) +{ + struct usb_host_interface *alt; + struct sd *sd = (struct sd *) gspca_dev; + + /* Start isoc bandwidth "negotiation" at max isoc bandwidth */ + alt = &gspca_dev->dev->config->intf_cache[0]->altsetting[1]; + alt->endpoint[0].desc.wMaxPacketSize = + cpu_to_le16(sd->sensor->max_packet_size[gspca_dev->curr_mode]); + + return 0; +} + +static int stv06xx_isoc_nego(struct gspca_dev *gspca_dev) +{ + int ret, packet_size, min_packet_size; + struct usb_host_interface *alt; + struct sd *sd = (struct sd *) gspca_dev; + + alt = &gspca_dev->dev->config->intf_cache[0]->altsetting[1]; + packet_size = le16_to_cpu(alt->endpoint[0].desc.wMaxPacketSize); + min_packet_size = sd->sensor->min_packet_size[gspca_dev->curr_mode]; + if (packet_size <= min_packet_size) + return -EIO; + + packet_size -= 100; + if (packet_size < min_packet_size) + packet_size = min_packet_size; + alt->endpoint[0].desc.wMaxPacketSize = cpu_to_le16(packet_size); + + ret = usb_set_interface(gspca_dev->dev, gspca_dev->iface, 1); + if (ret < 0) + PDEBUG(D_ERR|D_STREAM, "set alt 1 err %d", ret); + + return ret; +} + static void stv06xx_stopN(struct gspca_dev *gspca_dev) { int err; @@ -349,7 +400,7 @@ static void stv06xx_pkt_scan(struct gspca_dev *gspca_dev, } /* First byte seem to be 02=data 2nd byte is unknown??? */ - if (sd->bridge == BRIDGE_ST6422 && (id & 0xFF00) == 0x0200) + if (sd->bridge == BRIDGE_ST6422 && (id & 0xff00) == 0x0200) goto frame_data; switch (id) { @@ -462,6 +513,8 @@ static const struct sd_desc sd_desc = { .start = stv06xx_start, .stopN = stv06xx_stopN, .pkt_scan = stv06xx_pkt_scan, + .isoc_init = stv06xx_isoc_init, + .isoc_nego = stv06xx_isoc_nego, #if defined(CONFIG_INPUT) || defined(CONFIG_INPUT_MODULE) .int_pkt_scan = sd_int_pkt_scan, #endif |