diff options
Diffstat (limited to 'drivers/media/video/gspca/sq905.c')
| -rw-r--r-- | drivers/media/video/gspca/sq905.c | 440 |
1 files changed, 0 insertions, 440 deletions
diff --git a/drivers/media/video/gspca/sq905.c b/drivers/media/video/gspca/sq905.c deleted file mode 100644 index a8ac97931ad6..000000000000 --- a/drivers/media/video/gspca/sq905.c +++ /dev/null @@ -1,440 +0,0 @@ -/* - * SQ905 subdriver - * - * Copyright (C) 2008, 2009 Adam Baker and Theodore Kilgore - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA - */ - -/* - * History and Acknowledgments - * - * The original Linux driver for SQ905 based cameras was written by - * Marcell Lengyel and furter developed by many other contributors - * and is available from http://sourceforge.net/projects/sqcam/ - * - * This driver takes advantage of the reverse engineering work done for - * that driver and for libgphoto2 but shares no code with them. - * - * This driver has used as a base the finepix driver and other gspca - * based drivers and may still contain code fragments taken from those - * drivers. - */ - -#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt - -#define MODULE_NAME "sq905" - -#include <linux/workqueue.h> -#include <linux/slab.h> -#include "gspca.h" - -MODULE_AUTHOR("Adam Baker <linux@baker-net.org.uk>, " - "Theodore Kilgore <kilgota@auburn.edu>"); -MODULE_DESCRIPTION("GSPCA/SQ905 USB Camera Driver"); -MODULE_LICENSE("GPL"); - -/* Default timeouts, in ms */ -#define SQ905_CMD_TIMEOUT 500 -#define SQ905_DATA_TIMEOUT 1000 - -/* Maximum transfer size to use. */ -#define SQ905_MAX_TRANSFER 0x8000 -#define FRAME_HEADER_LEN 64 - -/* The known modes, or registers. These go in the "value" slot. */ - -/* 00 is "none" obviously */ - -#define SQ905_BULK_READ 0x03 /* precedes any bulk read */ -#define SQ905_COMMAND 0x06 /* precedes the command codes below */ -#define SQ905_PING 0x07 /* when reading an "idling" command */ -#define SQ905_READ_DONE 0xc0 /* ack bulk read completed */ - -/* Any non-zero value in the bottom 2 bits of the 2nd byte of - * the ID appears to indicate the camera can do 640*480. If the - * LSB of that byte is set the image is just upside down, otherwise - * it is rotated 180 degrees. */ -#define SQ905_HIRES_MASK 0x00000300 -#define SQ905_ORIENTATION_MASK 0x00000100 - -/* Some command codes. These go in the "index" slot. */ - -#define SQ905_ID 0xf0 /* asks for model string */ -#define SQ905_CONFIG 0x20 /* gets photo alloc. table, not used here */ -#define SQ905_DATA 0x30 /* accesses photo data, not used here */ -#define SQ905_CLEAR 0xa0 /* clear everything */ -#define SQ905_CAPTURE_LOW 0x60 /* Starts capture at 160x120 */ -#define SQ905_CAPTURE_MED 0x61 /* Starts capture at 320x240 */ -#define SQ905_CAPTURE_HIGH 0x62 /* Starts capture at 640x480 (some cams only) */ -/* note that the capture command also controls the output dimensions */ - -/* Structure to hold all of our device specific stuff */ -struct sd { - struct gspca_dev gspca_dev; /* !! must be the first item */ - - /* - * Driver stuff - */ - struct work_struct work_struct; - struct workqueue_struct *work_thread; -}; - -static struct v4l2_pix_format sq905_mode[] = { - { 160, 120, V4L2_PIX_FMT_SBGGR8, V4L2_FIELD_NONE, - .bytesperline = 160, - .sizeimage = 160 * 120, - .colorspace = V4L2_COLORSPACE_SRGB, - .priv = 0}, - { 320, 240, V4L2_PIX_FMT_SBGGR8, V4L2_FIELD_NONE, - .bytesperline = 320, - .sizeimage = 320 * 240, - .colorspace = V4L2_COLORSPACE_SRGB, - .priv = 0}, - { 640, 480, V4L2_PIX_FMT_SBGGR8, V4L2_FIELD_NONE, - .bytesperline = 640, - .sizeimage = 640 * 480, - .colorspace = V4L2_COLORSPACE_SRGB, - .priv = 0} -}; - -/* - * Send a command to the camera. - */ -static int sq905_command(struct gspca_dev *gspca_dev, u16 index) -{ - int ret; - - gspca_dev->usb_buf[0] = '\0'; - ret = usb_control_msg(gspca_dev->dev, - usb_sndctrlpipe(gspca_dev->dev, 0), - USB_REQ_SYNCH_FRAME, /* request */ - USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE, - SQ905_COMMAND, index, gspca_dev->usb_buf, 1, - SQ905_CMD_TIMEOUT); - if (ret < 0) { - pr_err("%s: usb_control_msg failed (%d)\n", __func__, ret); - return ret; - } - - ret = usb_control_msg(gspca_dev->dev, - usb_sndctrlpipe(gspca_dev->dev, 0), - USB_REQ_SYNCH_FRAME, /* request */ - USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE, - SQ905_PING, 0, gspca_dev->usb_buf, 1, - SQ905_CMD_TIMEOUT); - if (ret < 0) { - pr_err("%s: usb_control_msg failed 2 (%d)\n", __func__, ret); - return ret; - } - - return 0; -} - -/* - * Acknowledge the end of a frame - see warning on sq905_command. - */ -static int sq905_ack_frame(struct gspca_dev *gspca_dev) -{ - int ret; - - gspca_dev->usb_buf[0] = '\0'; - ret = usb_control_msg(gspca_dev->dev, - usb_sndctrlpipe(gspca_dev->dev, 0), - USB_REQ_SYNCH_FRAME, /* request */ - USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE, - SQ905_READ_DONE, 0, gspca_dev->usb_buf, 1, - SQ905_CMD_TIMEOUT); - if (ret < 0) { - pr_err("%s: usb_control_msg failed (%d)\n", __func__, ret); - return ret; - } - - return 0; -} - -/* - * request and read a block of data - see warning on sq905_command. - */ -static int -sq905_read_data(struct gspca_dev *gspca_dev, u8 *data, int size, int need_lock) -{ - int ret; - int act_len; - - gspca_dev->usb_buf[0] = '\0'; - if (need_lock) - mutex_lock(&gspca_dev->usb_lock); - ret = usb_control_msg(gspca_dev->dev, - usb_sndctrlpipe(gspca_dev->dev, 0), - USB_REQ_SYNCH_FRAME, /* request */ - USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE, - SQ905_BULK_READ, size, gspca_dev->usb_buf, - 1, SQ905_CMD_TIMEOUT); - if (need_lock) - mutex_unlock(&gspca_dev->usb_lock); - if (ret < 0) { - pr_err("%s: usb_control_msg failed (%d)\n", __func__, ret); - return ret; - } - ret = usb_bulk_msg(gspca_dev->dev, - usb_rcvbulkpipe(gspca_dev->dev, 0x81), - data, size, &act_len, SQ905_DATA_TIMEOUT); - - /* successful, it returns 0, otherwise negative */ - if (ret < 0 || act_len != size) { - pr_err("bulk read fail (%d) len %d/%d\n", ret, act_len, size); - return -EIO; - } - return 0; -} - -/* This function is called as a workqueue function and runs whenever the camera - * is streaming data. Because it is a workqueue function it is allowed to sleep - * so we can use synchronous USB calls. To avoid possible collisions with other - * threads attempting to use the camera's USB interface we take the gspca - * usb_lock when performing USB operations. In practice the only thing we need - * to protect against is the usb_set_interface call that gspca makes during - * stream_off as the camera doesn't provide any controls that the user could try - * to change. - */ -static void sq905_dostream(struct work_struct *work) -{ - struct sd *dev = container_of(work, struct sd, work_struct); - struct gspca_dev *gspca_dev = &dev->gspca_dev; - int bytes_left; /* bytes remaining in current frame. */ - int data_len; /* size to use for the next read. */ - int header_read; /* true if we have already read the frame header. */ - int packet_type; - int frame_sz; - int ret; - u8 *data; - u8 *buffer; - - buffer = kmalloc(SQ905_MAX_TRANSFER, GFP_KERNEL | GFP_DMA); - if (!buffer) { - pr_err("Couldn't allocate USB buffer\n"); - goto quit_stream; - } - - frame_sz = gspca_dev->cam.cam_mode[gspca_dev->curr_mode].sizeimage - + FRAME_HEADER_LEN; - - while (gspca_dev->dev && gspca_dev->streaming) { -#ifdef CONFIG_PM - if (gspca_dev->frozen) - break; -#endif - /* request some data and then read it until we have - * a complete frame. */ - bytes_left = frame_sz; - header_read = 0; - - /* Note we do not check for gspca_dev->streaming here, as - we must finish reading an entire frame, otherwise the - next time we stream we start reading in the middle of a - frame. */ - while (bytes_left > 0 && gspca_dev->dev) { - data_len = bytes_left > SQ905_MAX_TRANSFER ? - SQ905_MAX_TRANSFER : bytes_left; - ret = sq905_read_data(gspca_dev, buffer, data_len, 1); - if (ret < 0) - goto quit_stream; - PDEBUG(D_PACK, - "Got %d bytes out of %d for frame", - data_len, bytes_left); - bytes_left -= data_len; - data = buffer; - if (!header_read) { - packet_type = FIRST_PACKET; - /* The first 64 bytes of each frame are - * a header full of FF 00 bytes */ - data += FRAME_HEADER_LEN; - data_len -= FRAME_HEADER_LEN; - header_read = 1; - } else if (bytes_left == 0) { - packet_type = LAST_PACKET; - } else { - packet_type = INTER_PACKET; - } - gspca_frame_add(gspca_dev, packet_type, - data, data_len); - /* If entire frame fits in one packet we still - need to add a LAST_PACKET */ - if (packet_type == FIRST_PACKET && - bytes_left == 0) - gspca_frame_add(gspca_dev, LAST_PACKET, - NULL, 0); - } - if (gspca_dev->dev) { - /* acknowledge the frame */ - mutex_lock(&gspca_dev->usb_lock); - ret = sq905_ack_frame(gspca_dev); - mutex_unlock(&gspca_dev->usb_lock); - if (ret < 0) - goto quit_stream; - } - } -quit_stream: - if (gspca_dev->dev) { - mutex_lock(&gspca_dev->usb_lock); - sq905_command(gspca_dev, SQ905_CLEAR); - mutex_unlock(&gspca_dev->usb_lock); - } - kfree(buffer); -} - -/* This function is called at probe time just before sd_init */ -static int sd_config(struct gspca_dev *gspca_dev, - const struct usb_device_id *id) -{ - struct cam *cam = &gspca_dev->cam; - struct sd *dev = (struct sd *) gspca_dev; - - /* We don't use the buffer gspca allocates so make it small. */ - cam->bulk = 1; - cam->bulk_size = 64; - - INIT_WORK(&dev->work_struct, sq905_dostream); - - return 0; -} - -/* called on streamoff with alt==0 and on disconnect */ -/* the usb_lock is held at entry - restore on exit */ -static void sd_stop0(struct gspca_dev *gspca_dev) -{ - struct sd *dev = (struct sd *) gspca_dev; - - /* wait for the work queue to terminate */ - mutex_unlock(&gspca_dev->usb_lock); - /* This waits for sq905_dostream to finish */ - destroy_workqueue(dev->work_thread); - dev->work_thread = NULL; - mutex_lock(&gspca_dev->usb_lock); -} - -/* this function is called at probe and resume time */ -static int sd_init(struct gspca_dev *gspca_dev) -{ - u32 ident; - int ret; - - /* connect to the camera and read - * the model ID and process that and put it away. - */ - ret = sq905_command(gspca_dev, SQ905_CLEAR); - if (ret < 0) - return ret; - ret = sq905_command(gspca_dev, SQ905_ID); - if (ret < 0) - return ret; - ret = sq905_read_data(gspca_dev, gspca_dev->usb_buf, 4, 0); - if (ret < 0) - return ret; - /* usb_buf is allocated with kmalloc so is aligned. - * Camera model number is the right way round if we assume this - * reverse engineered ID is supposed to be big endian. */ - ident = be32_to_cpup((__be32 *)gspca_dev->usb_buf); - ret = sq905_command(gspca_dev, SQ905_CLEAR); - if (ret < 0) - return ret; - PDEBUG(D_CONF, "SQ905 camera ID %08x detected", ident); - gspca_dev->cam.cam_mode = sq905_mode; - gspca_dev->cam.nmodes = ARRAY_SIZE(sq905_mode); - if (!(ident & SQ905_HIRES_MASK)) - gspca_dev->cam.nmodes--; - - if (ident & SQ905_ORIENTATION_MASK) - gspca_dev->cam.input_flags = V4L2_IN_ST_VFLIP; - else - gspca_dev->cam.input_flags = V4L2_IN_ST_VFLIP | - V4L2_IN_ST_HFLIP; - return 0; -} - -/* Set up for getting frames. */ -static int sd_start(struct gspca_dev *gspca_dev) -{ - struct sd *dev = (struct sd *) gspca_dev; - int ret; - - /* "Open the shutter" and set size, to start capture */ - switch (gspca_dev->curr_mode) { - default: -/* case 2: */ - PDEBUG(D_STREAM, "Start streaming at high resolution"); - ret = sq905_command(&dev->gspca_dev, SQ905_CAPTURE_HIGH); - break; - case 1: - PDEBUG(D_STREAM, "Start streaming at medium resolution"); - ret = sq905_command(&dev->gspca_dev, SQ905_CAPTURE_MED); - break; - case 0: - PDEBUG(D_STREAM, "Start streaming at low resolution"); - ret = sq905_command(&dev->gspca_dev, SQ905_CAPTURE_LOW); - } - - if (ret < 0) { - PDEBUG(D_ERR, "Start streaming command failed"); - return ret; - } - /* Start the workqueue function to do the streaming */ - dev->work_thread = create_singlethread_workqueue(MODULE_NAME); - queue_work(dev->work_thread, &dev->work_struct); - - return 0; -} - -/* Table of supported USB devices */ -static const struct usb_device_id device_table[] = { - {USB_DEVICE(0x2770, 0x9120)}, - {} -}; - -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, - .reset_resume = gspca_resume, -#endif -}; - -module_usb_driver(sd_driver); |