c0b33bdc5b
stv06xx devices have only one altsetting, but the actual used bandwidth can be programmed through a register. We were already setting this register lower then the max packetsize of the altsetting indicates. This patch makes the gspca-stv06xx update the usb descriptor for the alt setting to reflect the actual packetsize in use, so that the usb subsystem uses the correct information for scheduling usb transfers. This patch also tries to fallback to lower speeds in case a ENOSPC error is received when submitting urbs, but currently this is only supported with stv06xx cams with the pb0100 sensor, as this is the only one for which we know how to change the framerate. This patch is based on an initial incomplete patch by Lee Jones <lee.jones@canonical.com> Signed-off-by: Lee Jones <lee.jones@canonical.com> Signed-off-by: Hans de Goede <hdegoede@redhat.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
87 lines
2.8 KiB
C
87 lines
2.8 KiB
C
/*
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* Copyright (c) 2001 Jean-Fredric Clere, Nikolas Zimmermann, Georg Acher
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* Mark Cave-Ayland, Carlo E Prelz, Dick Streefland
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* Copyright (c) 2002, 2003 Tuukka Toivonen
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* Copyright (c) 2008 Erik Andrén
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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* P/N 861037: Sensor HDCS1000 ASIC STV0600
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* P/N 861050-0010: Sensor HDCS1000 ASIC STV0600
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* P/N 861050-0020: Sensor Photobit PB100 ASIC STV0600-1 - QuickCam Express
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* P/N 861055: Sensor ST VV6410 ASIC STV0610 - LEGO cam
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* P/N 861075-0040: Sensor HDCS1000 ASIC
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* P/N 961179-0700: Sensor ST VV6410 ASIC STV0602 - Dexxa WebCam USB
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* P/N 861040-0000: Sensor ST VV6410 ASIC STV0610 - QuickCam Web
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*/
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#ifndef STV06XX_SENSOR_H_
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#define STV06XX_SENSOR_H_
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#include "stv06xx.h"
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#define IS_1020(sd) ((sd)->sensor == &stv06xx_sensor_hdcs1020)
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extern const struct stv06xx_sensor stv06xx_sensor_vv6410;
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extern const struct stv06xx_sensor stv06xx_sensor_hdcs1x00;
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extern const struct stv06xx_sensor stv06xx_sensor_hdcs1020;
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extern const struct stv06xx_sensor stv06xx_sensor_pb0100;
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extern const struct stv06xx_sensor stv06xx_sensor_st6422;
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struct stv06xx_sensor {
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/* Defines the name of a sensor */
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char name[32];
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/* Sensor i2c address */
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u8 i2c_addr;
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/* Flush value*/
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u8 i2c_flush;
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/* length of an i2c word */
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u8 i2c_len;
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/* Isoc packet size (per mode) */
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int min_packet_size[4];
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int max_packet_size[4];
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/* Probes if the sensor is connected */
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int (*probe)(struct sd *sd);
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/* Performs a initialization sequence */
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int (*init)(struct sd *sd);
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/* Executed at device disconnect */
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void (*disconnect)(struct sd *sd);
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/* Reads a sensor register */
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int (*read_sensor)(struct sd *sd, const u8 address,
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u8 *i2c_data, const u8 len);
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/* Writes to a sensor register */
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int (*write_sensor)(struct sd *sd, const u8 address,
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u8 *i2c_data, const u8 len);
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/* Instructs the sensor to start streaming */
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int (*start)(struct sd *sd);
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/* Instructs the sensor to stop streaming */
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int (*stop)(struct sd *sd);
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/* Instructs the sensor to dump all its contents */
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int (*dump)(struct sd *sd);
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};
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#endif
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