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V4L/DVB (10639): gspca - sq905: New subdriver.
Add initial support for cameras based on the SQ Technologies SQ-905 chipset (USB ID 2770:9120) to V4L2 using the gspca infrastructure. Currently only supports one resolution and doesn't attempt to inform libv4l what image flipping options are needed. Signed-off-by: Adam Baker <linux@baker-net.org.uk> Signed-off-by: Theodore Kilgore <kilgota@auburn.edu> Signed-off-by: Jean-Francois Moine <moinejf@free.fr> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
parent
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3 changed files with 449 additions and 0 deletions
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@ -176,6 +176,15 @@ config USB_GSPCA_SPCA561
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To compile this driver as a module, choose M here: the
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module will be called gspca_spca561.
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config USB_GSPCA_SQ905
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tristate "SQ Technologies SQ905 based USB Camera Driver"
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depends on VIDEO_V4L2 && USB_GSPCA
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help
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Say Y here if you want support for cameras based on the SQ905 chip.
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To compile this driver as a module, choose M here: the
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module will be called gspca_sq905.
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config USB_GSPCA_STK014
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tristate "Syntek DV4000 (STK014) USB Camera Driver"
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depends on VIDEO_V4L2 && USB_GSPCA
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@ -16,6 +16,7 @@ obj-$(CONFIG_USB_GSPCA_SPCA505) += gspca_spca505.o
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obj-$(CONFIG_USB_GSPCA_SPCA506) += gspca_spca506.o
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obj-$(CONFIG_USB_GSPCA_SPCA508) += gspca_spca508.o
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obj-$(CONFIG_USB_GSPCA_SPCA561) += gspca_spca561.o
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obj-$(CONFIG_USB_GSPCA_SQ905) += gspca_sq905.o
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obj-$(CONFIG_USB_GSPCA_SUNPLUS) += gspca_sunplus.o
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obj-$(CONFIG_USB_GSPCA_STK014) += gspca_stk014.o
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obj-$(CONFIG_USB_GSPCA_T613) += gspca_t613.o
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@ -41,6 +42,7 @@ gspca_spca505-objs := spca505.o
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gspca_spca506-objs := spca506.o
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gspca_spca508-objs := spca508.o
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gspca_spca561-objs := spca561.o
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gspca_sq905-objs := sq905.o
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gspca_stk014-objs := stk014.o
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gspca_sunplus-objs := sunplus.o
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gspca_t613-objs := t613.o
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438
drivers/media/video/gspca/sq905.c
Normal file
438
drivers/media/video/gspca/sq905.c
Normal file
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@ -0,0 +1,438 @@
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/*
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* SQ905 subdriver
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*
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* Copyright (C) 2008, 2009 Adam Baker and Theodore Kilgore
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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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* 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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/*
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* History and Acknowledgments
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*
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* The original Linux driver for SQ905 based cameras was written by
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* Marcell Lengyel and furter developed by many other contributers
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* and is available from http://sourceforge.net/projects/sqcam/
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*
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* This driver takes advantage of the reverse engineering work done for
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* that driver and for libgphoto2 but shares no code with them.
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*
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* This driver has used as a base the finepix driver and other gspca
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* based drivers and may still contain code fragments taken from those
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* drivers.
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*/
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#define MODULE_NAME "sq905"
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#include <linux/workqueue.h>
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#include "gspca.h"
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MODULE_AUTHOR("Adam Baker <linux@baker-net.org.uk>, "
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"Theodore Kilgore <kilgota@auburn.edu>");
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MODULE_DESCRIPTION("GSPCA/SQ905 USB Camera Driver");
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MODULE_LICENSE("GPL");
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/* Default timeouts, in ms */
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#define SQ905_CMD_TIMEOUT 500
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#define SQ905_DATA_TIMEOUT 1000
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/* Maximum transfer size to use. */
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#define SQ905_MAX_TRANSFER 0x8000
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#define FRAME_HEADER_LEN 64
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/* The known modes, or registers. These go in the "value" slot. */
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/* 00 is "none" obviously */
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#define SQ905_BULK_READ 0x03 /* precedes any bulk read */
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#define SQ905_COMMAND 0x06 /* precedes the command codes below */
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#define SQ905_PING 0x07 /* when reading an "idling" command */
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#define SQ905_READ_DONE 0xc0 /* ack bulk read completed */
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/* Some command codes. These go in the "index" slot. */
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#define SQ905_ID 0xf0 /* asks for model string */
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#define SQ905_CONFIG 0x20 /* gets photo alloc. table, not used here */
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#define SQ905_DATA 0x30 /* accesses photo data, not used here */
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#define SQ905_CLEAR 0xa0 /* clear everything */
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#define SQ905_CAPTURE_LOW 0x60 /* Starts capture at 160x120 */
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#define SQ905_CAPTURE_MED 0x61 /* Starts capture at 320x240 */
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/* note that the capture command also controls the output dimensions */
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/* 0x60 -> 160x120, 0x61 -> 320x240 0x62 -> 640x480 depends on camera */
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/* 0x62 is not correct, at least for some cams. Should be 0x63 ? */
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/* Structure to hold all of our device specific stuff */
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struct sd {
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struct gspca_dev gspca_dev; /* !! must be the first item */
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u8 cam_type;
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/*
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* Driver stuff
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*/
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struct work_struct work_struct;
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struct workqueue_struct *work_thread;
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};
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/* The driver only supports 320x240 so far. */
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static struct v4l2_pix_format sq905_mode[1] = {
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{ 320, 240, V4L2_PIX_FMT_SBGGR8, V4L2_FIELD_NONE,
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.bytesperline = 320,
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.sizeimage = 320 * 240,
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.colorspace = V4L2_COLORSPACE_SRGB,
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.priv = 0}
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};
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struct cam_type {
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u32 ident_word;
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char *name;
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struct v4l2_pix_format *min_mode;
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u8 num_modes;
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u8 sensor_flags;
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};
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#define SQ905_FLIP_HORIZ (1 << 0)
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#define SQ905_FLIP_VERT (1 << 1)
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/* Last entry is default if nothing else matches */
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static struct cam_type cam_types[] = {
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{ 0x19010509, "PocketCam", &sq905_mode[0], 1, SQ905_FLIP_HORIZ },
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{ 0x32010509, "Magpix", &sq905_mode[0], 1, SQ905_FLIP_HORIZ },
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{ 0, "Default", &sq905_mode[0], 1, SQ905_FLIP_HORIZ | SQ905_FLIP_VERT }
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};
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/*
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* Send a command to the camera.
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*/
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static int sq905_command(struct gspca_dev *gspca_dev, u16 index)
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{
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int ret;
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gspca_dev->usb_buf[0] = '\0';
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ret = usb_control_msg(gspca_dev->dev,
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usb_sndctrlpipe(gspca_dev->dev, 0),
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USB_REQ_SYNCH_FRAME, /* request */
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USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
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SQ905_COMMAND, index, gspca_dev->usb_buf, 1,
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SQ905_CMD_TIMEOUT);
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if (ret < 0) {
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PDEBUG(D_ERR, "%s: usb_control_msg failed (%d)",
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__func__, ret);
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return ret;
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}
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ret = usb_control_msg(gspca_dev->dev,
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usb_sndctrlpipe(gspca_dev->dev, 0),
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USB_REQ_SYNCH_FRAME, /* request */
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USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
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SQ905_PING, 0, gspca_dev->usb_buf, 1,
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SQ905_CMD_TIMEOUT);
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if (ret < 0) {
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PDEBUG(D_ERR, "%s: usb_control_msg failed 2 (%d)",
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__func__, ret);
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return ret;
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}
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return 0;
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}
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/*
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* Acknowledge the end of a frame - see warning on sq905_command.
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*/
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static int sq905_ack_frame(struct gspca_dev *gspca_dev)
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{
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int ret;
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gspca_dev->usb_buf[0] = '\0';
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ret = usb_control_msg(gspca_dev->dev,
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usb_sndctrlpipe(gspca_dev->dev, 0),
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USB_REQ_SYNCH_FRAME, /* request */
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USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
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SQ905_READ_DONE, 0, gspca_dev->usb_buf, 1,
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SQ905_CMD_TIMEOUT);
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if (ret < 0) {
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PDEBUG(D_ERR, "%s: usb_control_msg failed (%d)", __func__, ret);
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return ret;
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}
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return 0;
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}
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/*
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* request and read a block of data - see warning on sq905_command.
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*/
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static int
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sq905_read_data(struct gspca_dev *gspca_dev, u8 *data, int size)
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{
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int ret;
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int act_len;
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gspca_dev->usb_buf[0] = '\0';
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ret = usb_control_msg(gspca_dev->dev,
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usb_sndctrlpipe(gspca_dev->dev, 0),
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USB_REQ_SYNCH_FRAME, /* request */
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USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
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SQ905_BULK_READ, size, gspca_dev->usb_buf,
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1, SQ905_CMD_TIMEOUT);
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if (ret < 0) {
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PDEBUG(D_ERR, "%s: usb_control_msg failed (%d)", __func__, ret);
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return ret;
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}
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ret = usb_bulk_msg(gspca_dev->dev,
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usb_rcvbulkpipe(gspca_dev->dev, 0x81),
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data, size, &act_len, SQ905_DATA_TIMEOUT);
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/* successful, it returns 0, otherwise negative */
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if (ret < 0 || act_len != size) {
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PDEBUG(D_ERR, "bulk read fail (%d) len %d/%d",
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ret, act_len, size);
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return -EIO;
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}
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return 0;
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}
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/* This function is called as a workqueue function and runs whenever the camera
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* is streaming data. Because it is a workqueue function it is allowed to sleep
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* so we can use synchronous USB calls. To avoid possible collisions with other
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* threads attempting to use the camera's USB interface we take the gspca
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* usb_lock when performing USB operations. In practice the only thing we need
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* to protect against is the usb_set_interface call that gspca makes during
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* stream_off as the camera doesn't provide any controls that the user could try
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* to change.
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*/
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static void sq905_dostream(struct work_struct *work)
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{
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struct sd *dev = container_of(work, struct sd, work_struct);
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struct gspca_dev *gspca_dev = &dev->gspca_dev;
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struct gspca_frame *frame;
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int bytes_left; /* bytes remaining in current frame. */
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int data_len; /* size to use for the next read. */
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int header_read; /* true if we have already read the frame header. */
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int discarding; /* true if we failed to get space for frame. */
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int packet_type;
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int ret;
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u8 *data;
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u8 *buffer;
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buffer = kmalloc(SQ905_MAX_TRANSFER, GFP_KERNEL | GFP_DMA);
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mutex_lock(&gspca_dev->usb_lock);
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if (!buffer) {
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PDEBUG(D_ERR, "Couldn't allocate USB buffer");
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goto quit_stream;
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}
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while (gspca_dev->present && gspca_dev->streaming) {
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/* Need a short delay to ensure streaming flag was set by
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* gspca and to make sure gspca can grab the mutex. */
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mutex_unlock(&gspca_dev->usb_lock);
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msleep(1);
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/* request some data and then read it until we have
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* a complete frame. */
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bytes_left = sq905_mode[0].sizeimage + FRAME_HEADER_LEN;
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header_read = 0;
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discarding = 0;
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while (bytes_left > 0) {
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data_len = bytes_left > SQ905_MAX_TRANSFER ?
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SQ905_MAX_TRANSFER : bytes_left;
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mutex_lock(&gspca_dev->usb_lock);
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if (!gspca_dev->present)
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goto quit_stream;
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ret = sq905_read_data(gspca_dev, buffer, data_len);
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if (ret < 0)
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goto quit_stream;
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mutex_unlock(&gspca_dev->usb_lock);
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PDEBUG(D_STREAM,
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"Got %d bytes out of %d for frame",
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data_len, bytes_left);
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bytes_left -= data_len;
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data = buffer;
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if (!header_read) {
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packet_type = FIRST_PACKET;
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/* The first 64 bytes of each frame are
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* a header full of FF 00 bytes */
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data += FRAME_HEADER_LEN;
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data_len -= FRAME_HEADER_LEN;
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header_read = 1;
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} else if (bytes_left == 0) {
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packet_type = LAST_PACKET;
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} else {
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packet_type = INTER_PACKET;
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}
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frame = gspca_get_i_frame(gspca_dev);
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if (frame && !discarding)
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gspca_frame_add(gspca_dev, packet_type,
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frame, data, data_len);
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else
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discarding = 1;
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}
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/* acknowledge the frame */
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mutex_lock(&gspca_dev->usb_lock);
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if (!gspca_dev->present)
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goto quit_stream;
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ret = sq905_ack_frame(gspca_dev);
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if (ret < 0)
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goto quit_stream;
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}
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quit_stream:
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/* the usb_lock is already acquired */
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if (gspca_dev->present)
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sq905_command(gspca_dev, SQ905_CLEAR);
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mutex_unlock(&gspca_dev->usb_lock);
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kfree(buffer);
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}
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/* This function is called at probe time just before sd_init */
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static int sd_config(struct gspca_dev *gspca_dev,
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const struct usb_device_id *id)
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{
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struct cam *cam = &gspca_dev->cam;
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struct sd *dev = (struct sd *) gspca_dev;
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cam->cam_mode = sq905_mode;
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cam->nmodes = 1;
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/* We don't use the buffer gspca allocates so make it small. */
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cam->bulk_size = 64;
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INIT_WORK(&dev->work_struct, sq905_dostream);
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return 0;
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}
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/* called on streamoff with alt==0 and on disconnect */
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/* the usb_lock is held at entry - restore on exit */
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static void sd_stop0(struct gspca_dev *gspca_dev)
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{
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struct sd *dev = (struct sd *) gspca_dev;
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/* wait for the work queue to terminate */
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mutex_unlock(&gspca_dev->usb_lock);
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/* This waits for sq905_dostream to finish */
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destroy_workqueue(dev->work_thread);
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dev->work_thread = NULL;
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mutex_lock(&gspca_dev->usb_lock);
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}
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/* this function is called at probe and resume time */
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static int sd_init(struct gspca_dev *gspca_dev)
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{
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struct sd *dev = (struct sd *) gspca_dev;
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u32 ident;
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int ret;
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/* connect to the camera and read
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* the model ID and process that and put it away.
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*/
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ret = sq905_command(gspca_dev, SQ905_CLEAR);
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if (ret < 0)
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return ret;
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ret = sq905_command(gspca_dev, SQ905_ID);
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if (ret < 0)
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return ret;
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ret = sq905_read_data(gspca_dev, gspca_dev->usb_buf, 4);
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if (ret < 0)
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return ret;
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/* usb_buf is allocated with kmalloc so is aligned. */
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ident = le32_to_cpup((u32 *)gspca_dev->usb_buf);
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ret = sq905_command(gspca_dev, SQ905_CLEAR);
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if (ret < 0)
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return ret;
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dev->cam_type = 0;
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while (dev->cam_type < ARRAY_SIZE(cam_types) - 1 &&
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ident != cam_types[dev->cam_type].ident_word)
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dev->cam_type++;
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PDEBUG(D_CONF, "SQ905 camera %s, ID %08x detected",
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cam_types[dev->cam_type].name, ident);
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return 0;
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}
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/* Set up for getting frames. */
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static int sd_start(struct gspca_dev *gspca_dev)
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{
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struct sd *dev = (struct sd *) gspca_dev;
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int ret;
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/* "Open the shutter" and set size, to start capture */
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ret = sq905_command(&dev->gspca_dev, SQ905_CAPTURE_MED);
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if (ret < 0) {
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PDEBUG(D_ERR, "Start streaming command failed");
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return ret;
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}
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/* Start the workqueue function to do the streaming */
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dev->work_thread = create_singlethread_workqueue(MODULE_NAME);
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queue_work(dev->work_thread, &dev->work_struct);
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return 0;
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}
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/* Table of supported USB devices */
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static const __devinitdata struct usb_device_id device_table[] = {
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{USB_DEVICE(0x2770, 0x9120)},
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{}
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};
|
||||
|
||||
MODULE_DEVICE_TABLE(usb, device_table);
|
||||
|
||||
/* sub-driver description */
|
||||
static const struct sd_desc sd_desc = {
|
||||
.name = MODULE_NAME,
|
||||
.config = sd_config,
|
||||
.init = sd_init,
|
||||
.start = sd_start,
|
||||
.stop0 = sd_stop0,
|
||||
};
|
||||
|
||||
/* -- device connect -- */
|
||||
static int sd_probe(struct usb_interface *intf,
|
||||
const struct usb_device_id *id)
|
||||
{
|
||||
return gspca_dev_probe(intf, id,
|
||||
&sd_desc,
|
||||
sizeof(struct sd),
|
||||
THIS_MODULE);
|
||||
}
|
||||
|
||||
static struct usb_driver sd_driver = {
|
||||
.name = MODULE_NAME,
|
||||
.id_table = device_table,
|
||||
.probe = sd_probe,
|
||||
.disconnect = gspca_disconnect,
|
||||
#ifdef CONFIG_PM
|
||||
.suspend = gspca_suspend,
|
||||
.resume = gspca_resume,
|
||||
#endif
|
||||
};
|
||||
|
||||
/* -- module insert / remove -- */
|
||||
static int __init sd_mod_init(void)
|
||||
{
|
||||
int ret;
|
||||
|
||||
ret = usb_register(&sd_driver);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
PDEBUG(D_PROBE, "registered");
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void __exit sd_mod_exit(void)
|
||||
{
|
||||
usb_deregister(&sd_driver);
|
||||
PDEBUG(D_PROBE, "deregistered");
|
||||
}
|
||||
|
||||
module_init(sd_mod_init);
|
||||
module_exit(sd_mod_exit);
|
Loading…
Reference in a new issue