summaryrefslogtreecommitdiffstats
path: root/drivers/media/usb/gspca/sq905.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/media/usb/gspca/sq905.c')
-rw-r--r--drivers/media/usb/gspca/sq905.c434
1 files changed, 434 insertions, 0 deletions
diff --git a/drivers/media/usb/gspca/sq905.c b/drivers/media/usb/gspca/sq905.c
new file mode 100644
index 000000000..dc3caf1b3
--- /dev/null
+++ b/drivers/media/usb/gspca/sq905.c
@@ -0,0 +1,434 @@
+/*
+ * 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.
+ */
+
+/*
+ * 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_rcvctrlpipe(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 = 0;
+
+ 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 gspca_dev->usb_buf we take the usb_lock when
+ * performing USB operations using it. In practice we don't really need this
+ * as the camera doesn't provide any controls.
+ */
+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);
+ 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->present && 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->present) {
+ 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;
+ gspca_dbg(gspca_dev, D_PACK,
+ "Got %d bytes out of %d for frame\n",
+ 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->present) {
+ /* 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->present) {
+ 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;
+ gspca_dbg(gspca_dev, D_CONF, "SQ905 camera ID %08x detected\n", 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: */
+ gspca_dbg(gspca_dev, D_STREAM, "Start streaming at high resolution\n");
+ ret = sq905_command(&dev->gspca_dev, SQ905_CAPTURE_HIGH);
+ break;
+ case 1:
+ gspca_dbg(gspca_dev, D_STREAM, "Start streaming at medium resolution\n");
+ ret = sq905_command(&dev->gspca_dev, SQ905_CAPTURE_MED);
+ break;
+ case 0:
+ gspca_dbg(gspca_dev, D_STREAM, "Start streaming at low resolution\n");
+ ret = sq905_command(&dev->gspca_dev, SQ905_CAPTURE_LOW);
+ }
+
+ if (ret < 0) {
+ gspca_err(gspca_dev, "Start streaming command failed\n");
+ 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);
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-28 09:36:53 +0000