#define MODULE_NAME "sq905"
#include <linux/workqueue.h>
+#include <linux/slab.h>
#include "gspca.h"
MODULE_AUTHOR("Adam Baker <linux@baker-net.org.uk>, "
#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_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 */
-/* 0x60 -> 160x120, 0x61 -> 320x240 0x62 -> 640x480 depends on camera */
-/* 0x62 is not correct, at least for some cams. Should be 0x63 ? */
/* Structure to hold all of our device specific stuff */
struct sd {
struct gspca_dev gspca_dev; /* !! must be the first item */
- u8 cam_type;
-
/*
* Driver stuff
*/
struct workqueue_struct *work_thread;
};
-/* The driver only supports 320x240 so far. */
-static struct v4l2_pix_format sq905_mode[1] = {
+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}
};
-struct cam_type {
- u32 ident_word;
- char *name;
- struct v4l2_pix_format *min_mode;
- u8 num_modes;
- u8 sensor_flags;
-};
-
-#define SQ905_FLIP_HORIZ (1 << 0)
-#define SQ905_FLIP_VERT (1 << 1)
-
-/* Last entry is default if nothing else matches */
-static struct cam_type cam_types[] = {
- { 0x19010509, "PocketCam", &sq905_mode[0], 1, SQ905_FLIP_HORIZ },
- { 0x32010509, "Magpix", &sq905_mode[0], 1, SQ905_FLIP_HORIZ },
- { 0, "Default", &sq905_mode[0], 1, SQ905_FLIP_HORIZ | SQ905_FLIP_VERT }
-};
-
/*
* Send a command to the camera.
*/
* 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)
+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) {
PDEBUG(D_ERR, "%s: usb_control_msg failed (%d)", __func__, ret);
return ret;
{
struct sd *dev = container_of(work, struct sd, work_struct);
struct gspca_dev *gspca_dev = &dev->gspca_dev;
- struct gspca_frame *frame;
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 discarding; /* true if we failed to get space for frame. */
int packet_type;
+ int frame_sz;
int ret;
u8 *data;
u8 *buffer;
buffer = kmalloc(SQ905_MAX_TRANSFER, GFP_KERNEL | GFP_DMA);
- mutex_lock(&gspca_dev->usb_lock);
if (!buffer) {
PDEBUG(D_ERR, "Couldn't allocate USB buffer");
goto quit_stream;
}
- while (gspca_dev->present && gspca_dev->streaming) {
- /* Need a short delay to ensure streaming flag was set by
- * gspca and to make sure gspca can grab the mutex. */
- mutex_unlock(&gspca_dev->usb_lock);
- msleep(1);
+ frame_sz = gspca_dev->cam.cam_mode[gspca_dev->curr_mode].sizeimage
+ + FRAME_HEADER_LEN;
+ while (gspca_dev->present && gspca_dev->streaming) {
/* request some data and then read it until we have
* a complete frame. */
- bytes_left = sq905_mode[0].sizeimage + FRAME_HEADER_LEN;
+ bytes_left = frame_sz;
header_read = 0;
- discarding = 0;
- while (bytes_left > 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;
- mutex_lock(&gspca_dev->usb_lock);
- if (!gspca_dev->present)
- goto quit_stream;
- ret = sq905_read_data(gspca_dev, buffer, data_len);
+ ret = sq905_read_data(gspca_dev, buffer, data_len, 1);
if (ret < 0)
goto quit_stream;
- mutex_unlock(&gspca_dev->usb_lock);
- PDEBUG(D_STREAM,
+ PDEBUG(D_PACK,
"Got %d bytes out of %d for frame",
data_len, bytes_left);
bytes_left -= data_len;
} else {
packet_type = INTER_PACKET;
}
- frame = gspca_get_i_frame(gspca_dev);
- if (frame && !discarding)
- gspca_frame_add(gspca_dev, packet_type,
- frame, data, data_len);
- else
- discarding = 1;
+ 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;
}
- /* acknowledge the frame */
- mutex_lock(&gspca_dev->usb_lock);
- if (!gspca_dev->present)
- goto quit_stream;
- ret = sq905_ack_frame(gspca_dev);
- if (ret < 0)
- goto quit_stream;
}
quit_stream:
- /* the usb_lock is already acquired */
- if (gspca_dev->present)
+ if (gspca_dev->present) {
+ mutex_lock(&gspca_dev->usb_lock);
sq905_command(gspca_dev, SQ905_CLEAR);
- mutex_unlock(&gspca_dev->usb_lock);
+ mutex_unlock(&gspca_dev->usb_lock);
+ }
kfree(buffer);
}
struct cam *cam = &gspca_dev->cam;
struct sd *dev = (struct sd *) gspca_dev;
- cam->cam_mode = sq905_mode;
- cam->nmodes = 1;
/* 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);
/* this function is called at probe and resume time */
static int sd_init(struct gspca_dev *gspca_dev)
{
- struct sd *dev = (struct sd *) gspca_dev;
u32 ident;
int ret;
ret = sq905_command(gspca_dev, SQ905_ID);
if (ret < 0)
return ret;
- ret = sq905_read_data(gspca_dev, gspca_dev->usb_buf, 4);
+ 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. */
- ident = le32_to_cpup((u32 *)gspca_dev->usb_buf);
+ /* 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;
- dev->cam_type = 0;
- while (dev->cam_type < ARRAY_SIZE(cam_types) - 1 &&
- ident != cam_types[dev->cam_type].ident_word)
- dev->cam_type++;
- PDEBUG(D_CONF, "SQ905 camera %s, ID %08x detected",
- cam_types[dev->cam_type].name, ident);
+ 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;
}
int ret;
/* "Open the shutter" and set size, to start capture */
- ret = sq905_command(&dev->gspca_dev, SQ905_CAPTURE_MED);
+ 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);
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