--- /dev/null
+/*
+ * Jeilin JL2005B/C/D library
+ *
+ * Copyright (C) 2011 Theodore Kilgore <kilgota@auburn.edu>
+ *
+ * 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
+ */
+
+#define MODULE_NAME "jl2005bcd"
+
+#include <linux/workqueue.h>
+#include <linux/slab.h>
+#include "gspca.h"
+
+
+MODULE_AUTHOR("Theodore Kilgore <kilgota@auburn.edu>");
+MODULE_DESCRIPTION("JL2005B/C/D USB Camera Driver");
+MODULE_LICENSE("GPL");
+
+/* Default timeouts, in ms */
+#define JL2005C_CMD_TIMEOUT 500
+#define JL2005C_DATA_TIMEOUT 1000
+
+/* Maximum transfer size to use. */
+#define JL2005C_MAX_TRANSFER 0x200
+#define FRAME_HEADER_LEN 16
+
+
+/* specific webcam descriptor */
+struct sd {
+ struct gspca_dev gspca_dev; /* !! must be the first item */
+ unsigned char firmware_id[6];
+ const struct v4l2_pix_format *cap_mode;
+ /* Driver stuff */
+ struct work_struct work_struct;
+ struct workqueue_struct *work_thread;
+ u8 frame_brightness;
+ int block_size; /* block size of camera */
+ int vga; /* 1 if vga cam, 0 if cif cam */
+};
+
+
+/* Camera has two resolution settings. What they are depends on model. */
+static const struct v4l2_pix_format cif_mode[] = {
+ {176, 144, V4L2_PIX_FMT_JL2005BCD, V4L2_FIELD_NONE,
+ .bytesperline = 176,
+ .sizeimage = 176 * 144,
+ .colorspace = V4L2_COLORSPACE_SRGB,
+ .priv = 0},
+ {352, 288, V4L2_PIX_FMT_JL2005BCD, V4L2_FIELD_NONE,
+ .bytesperline = 352,
+ .sizeimage = 352 * 288,
+ .colorspace = V4L2_COLORSPACE_SRGB,
+ .priv = 0},
+};
+
+static const struct v4l2_pix_format vga_mode[] = {
+ {320, 240, V4L2_PIX_FMT_JL2005BCD, V4L2_FIELD_NONE,
+ .bytesperline = 320,
+ .sizeimage = 320 * 240,
+ .colorspace = V4L2_COLORSPACE_SRGB,
+ .priv = 0},
+ {640, 480, V4L2_PIX_FMT_JL2005BCD, V4L2_FIELD_NONE,
+ .bytesperline = 640,
+ .sizeimage = 640 * 480,
+ .colorspace = V4L2_COLORSPACE_SRGB,
+ .priv = 0},
+};
+
+/*
+ * cam uses endpoint 0x03 to send commands, 0x84 for read commands,
+ * and 0x82 for bulk data transfer.
+ */
+
+/* All commands are two bytes only */
+static int jl2005c_write2(struct gspca_dev *gspca_dev, unsigned char *command)
+{
+ int retval;
+
+ memcpy(gspca_dev->usb_buf, command, 2);
+ retval = usb_bulk_msg(gspca_dev->dev,
+ usb_sndbulkpipe(gspca_dev->dev, 3),
+ gspca_dev->usb_buf, 2, NULL, 500);
+ if (retval < 0)
+ pr_err("command write [%02x] error %d\n",
+ gspca_dev->usb_buf[0], retval);
+ return retval;
+}
+
+/* Response to a command is one byte in usb_buf[0], only if requested. */
+static int jl2005c_read1(struct gspca_dev *gspca_dev)
+{
+ int retval;
+
+ retval = usb_bulk_msg(gspca_dev->dev,
+ usb_rcvbulkpipe(gspca_dev->dev, 0x84),
+ gspca_dev->usb_buf, 1, NULL, 500);
+ if (retval < 0)
+ pr_err("read command [0x%02x] error %d\n",
+ gspca_dev->usb_buf[0], retval);
+ return retval;
+}
+
+/* Response appears in gspca_dev->usb_buf[0] */
+static int jl2005c_read_reg(struct gspca_dev *gspca_dev, unsigned char reg)
+{
+ int retval;
+
+ static u8 instruction[2] = {0x95, 0x00};
+ /* put register to read in byte 1 */
+ instruction[1] = reg;
+ /* Send the read request */
+ retval = jl2005c_write2(gspca_dev, instruction);
+ if (retval < 0)
+ return retval;
+ retval = jl2005c_read1(gspca_dev);
+
+ return retval;
+}
+
+static int jl2005c_start_new_frame(struct gspca_dev *gspca_dev)
+{
+ int i;
+ int retval;
+ int frame_brightness = 0;
+
+ static u8 instruction[2] = {0x7f, 0x01};
+
+ retval = jl2005c_write2(gspca_dev, instruction);
+ if (retval < 0)
+ return retval;
+
+ i = 0;
+ while (i < 20 && !frame_brightness) {
+ /* If we tried 20 times, give up. */
+ retval = jl2005c_read_reg(gspca_dev, 0x7e);
+ if (retval < 0)
+ return retval;
+ frame_brightness = gspca_dev->usb_buf[0];
+ retval = jl2005c_read_reg(gspca_dev, 0x7d);
+ if (retval < 0)
+ return retval;
+ i++;
+ }
+ PDEBUG(D_FRAM, "frame_brightness is 0x%02x", gspca_dev->usb_buf[0]);
+ return retval;
+}
+
+static int jl2005c_write_reg(struct gspca_dev *gspca_dev, unsigned char reg,
+ unsigned char value)
+{
+ int retval;
+ u8 instruction[2];
+
+ instruction[0] = reg;
+ instruction[1] = value;
+
+ retval = jl2005c_write2(gspca_dev, instruction);
+ if (retval < 0)
+ return retval;
+
+ return retval;
+}
+
+static int jl2005c_get_firmware_id(struct gspca_dev *gspca_dev)
+{
+ struct sd *sd = (struct sd *)gspca_dev;
+ int i = 0;
+ int retval = -1;
+ unsigned char regs_to_read[] = {0x57, 0x02, 0x03, 0x5d, 0x5e, 0x5f};
+
+ PDEBUG(D_PROBE, "Running jl2005c_get_firmware_id");
+ /* Read the first ID byte once for warmup */
+ retval = jl2005c_read_reg(gspca_dev, regs_to_read[0]);
+ PDEBUG(D_PROBE, "response is %02x", gspca_dev->usb_buf[0]);
+ if (retval < 0)
+ return retval;
+ /* Now actually get the ID string */
+ for (i = 0; i < 6; i++) {
+ retval = jl2005c_read_reg(gspca_dev, regs_to_read[i]);
+ if (retval < 0)
+ return retval;
+ sd->firmware_id[i] = gspca_dev->usb_buf[0];
+ }
+ PDEBUG(D_PROBE, "firmware ID is %02x%02x%02x%02x%02x%02x",
+ sd->firmware_id[0],
+ sd->firmware_id[1],
+ sd->firmware_id[2],
+ sd->firmware_id[3],
+ sd->firmware_id[4],
+ sd->firmware_id[5]);
+ return 0;
+}
+
+static int jl2005c_stream_start_vga_lg
+ (struct gspca_dev *gspca_dev)
+{
+ int i;
+ int retval = -1;
+ static u8 instruction[][2] = {
+ {0x05, 0x00},
+ {0x7c, 0x00},
+ {0x7d, 0x18},
+ {0x02, 0x00},
+ {0x01, 0x00},
+ {0x04, 0x52},
+ };
+
+ for (i = 0; i < ARRAY_SIZE(instruction); i++) {
+ msleep(60);
+ retval = jl2005c_write2(gspca_dev, instruction[i]);
+ if (retval < 0)
+ return retval;
+ }
+ msleep(60);
+ return retval;
+}
+
+static int jl2005c_stream_start_vga_small(struct gspca_dev *gspca_dev)
+{
+ int i;
+ int retval = -1;
+ static u8 instruction[][2] = {
+ {0x06, 0x00},
+ {0x7c, 0x00},
+ {0x7d, 0x1a},
+ {0x02, 0x00},
+ {0x01, 0x00},
+ {0x04, 0x52},
+ };
+
+ for (i = 0; i < ARRAY_SIZE(instruction); i++) {
+ msleep(60);
+ retval = jl2005c_write2(gspca_dev, instruction[i]);
+ if (retval < 0)
+ return retval;
+ }
+ msleep(60);
+ return retval;
+}
+
+static int jl2005c_stream_start_cif_lg(struct gspca_dev *gspca_dev)
+{
+ int i;
+ int retval = -1;
+ static u8 instruction[][2] = {
+ {0x05, 0x00},
+ {0x7c, 0x00},
+ {0x7d, 0x30},
+ {0x02, 0x00},
+ {0x01, 0x00},
+ {0x04, 0x42},
+ };
+
+ for (i = 0; i < ARRAY_SIZE(instruction); i++) {
+ msleep(60);
+ retval = jl2005c_write2(gspca_dev, instruction[i]);
+ if (retval < 0)
+ return retval;
+ }
+ msleep(60);
+ return retval;
+}
+
+static int jl2005c_stream_start_cif_small(struct gspca_dev *gspca_dev)
+{
+ int i;
+ int retval = -1;
+ static u8 instruction[][2] = {
+ {0x06, 0x00},
+ {0x7c, 0x00},
+ {0x7d, 0x32},
+ {0x02, 0x00},
+ {0x01, 0x00},
+ {0x04, 0x42},
+ };
+
+ for (i = 0; i < ARRAY_SIZE(instruction); i++) {
+ msleep(60);
+ retval = jl2005c_write2(gspca_dev, instruction[i]);
+ if (retval < 0)
+ return retval;
+ }
+ msleep(60);
+ return retval;
+}
+
+
+static int jl2005c_stop(struct gspca_dev *gspca_dev)
+{
+ int retval;
+
+ retval = jl2005c_write_reg(gspca_dev, 0x07, 0x00);
+ return retval;
+}
+
+/* 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 the gspca usb_lock is
+ * used when performing the one USB control operation inside the workqueue,
+ * which tells the camera to close the stream. In practice the only thing
+ * which needs to be protected against is the usb_set_interface call that
+ * gspca makes during stream_off. Otherwise the camera doesn't provide any
+ * controls that the user could try to change.
+ */
+static void jl2005c_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 = 0; /* bytes remaining in current frame. */
+ int data_len; /* size to use for the next read. */
+ int header_read = 0;
+ unsigned char header_sig[2] = {0x4a, 0x4c};
+ int act_len;
+ int packet_type;
+ int ret;
+ u8 *buffer;
+
+ buffer = kmalloc(JL2005C_MAX_TRANSFER, GFP_KERNEL | GFP_DMA);
+ if (!buffer) {
+ pr_err("Couldn't allocate USB buffer\n");
+ goto quit_stream;
+ }
+
+ while (gspca_dev->present && gspca_dev->streaming) {
+ /* Check if this is a new frame. If so, start the frame first */
+ if (!header_read) {
+ mutex_lock(&gspca_dev->usb_lock);
+ ret = jl2005c_start_new_frame(gspca_dev);
+ mutex_unlock(&gspca_dev->usb_lock);
+ if (ret < 0)
+ goto quit_stream;
+ ret = usb_bulk_msg(gspca_dev->dev,
+ usb_rcvbulkpipe(gspca_dev->dev, 0x82),
+ buffer, JL2005C_MAX_TRANSFER, &act_len,
+ JL2005C_DATA_TIMEOUT);
+ PDEBUG(D_PACK,
+ "Got %d bytes out of %d for header",
+ act_len, JL2005C_MAX_TRANSFER);
+ if (ret < 0 || act_len < JL2005C_MAX_TRANSFER)
+ goto quit_stream;
+ /* Check whether we actually got the first blodk */
+ if (memcmp(header_sig, buffer, 2) != 0) {
+ pr_err("First block is not the first block\n");
+ goto quit_stream;
+ }
+ /* total size to fetch is byte 7, times blocksize
+ * of which we already got act_len */
+ bytes_left = buffer[0x07] * dev->block_size - act_len;
+ PDEBUG(D_PACK, "bytes_left = 0x%x", bytes_left);
+ /* We keep the header. It has other information, too.*/
+ packet_type = FIRST_PACKET;
+ gspca_frame_add(gspca_dev, packet_type,
+ buffer, act_len);
+ header_read = 1;
+ }
+ while (bytes_left > 0 && gspca_dev->present) {
+ data_len = bytes_left > JL2005C_MAX_TRANSFER ?
+ JL2005C_MAX_TRANSFER : bytes_left;
+ ret = usb_bulk_msg(gspca_dev->dev,
+ usb_rcvbulkpipe(gspca_dev->dev, 0x82),
+ buffer, data_len, &act_len,
+ JL2005C_DATA_TIMEOUT);
+ if (ret < 0 || act_len < data_len)
+ goto quit_stream;
+ PDEBUG(D_PACK,
+ "Got %d bytes out of %d for frame",
+ data_len, bytes_left);
+ bytes_left -= data_len;
+ if (bytes_left == 0) {
+ packet_type = LAST_PACKET;
+ header_read = 0;
+ } else
+ packet_type = INTER_PACKET;
+ gspca_frame_add(gspca_dev, packet_type,
+ buffer, data_len);
+ }
+ }
+quit_stream:
+ if (gspca_dev->present) {
+ mutex_lock(&gspca_dev->usb_lock);
+ jl2005c_stop(gspca_dev);
+ mutex_unlock(&gspca_dev->usb_lock);
+ }
+ kfree(buffer);
+}
+
+
+
+
+/* This function is called at probe time */
+static int sd_config(struct gspca_dev *gspca_dev,
+ const struct usb_device_id *id)
+{
+ struct cam *cam;
+ struct sd *sd = (struct sd *) gspca_dev;
+
+ cam = &gspca_dev->cam;
+ /* We don't use the buffer gspca allocates so make it small. */
+ cam->bulk_size = 64;
+ cam->bulk = 1;
+ /* For the rest, the camera needs to be detected */
+ jl2005c_get_firmware_id(gspca_dev);
+ /* Here are some known firmware IDs
+ * First some JL2005B cameras
+ * {0x41, 0x07, 0x04, 0x2c, 0xe8, 0xf2} Sakar KidzCam
+ * {0x45, 0x02, 0x08, 0xb9, 0x00, 0xd2} No-name JL2005B
+ * JL2005C cameras
+ * {0x01, 0x0c, 0x16, 0x10, 0xf8, 0xc8} Argus DC-1512
+ * {0x12, 0x04, 0x03, 0xc0, 0x00, 0xd8} ICarly
+ * {0x86, 0x08, 0x05, 0x02, 0x00, 0xd4} Jazz
+ *
+ * Based upon this scanty evidence, we can detect a CIF camera by
+ * testing byte 0 for 0x4x.
+ */
+ if ((sd->firmware_id[0] & 0xf0) == 0x40) {
+ cam->cam_mode = cif_mode;
+ cam->nmodes = ARRAY_SIZE(cif_mode);
+ sd->block_size = 0x80;
+ } else {
+ cam->cam_mode = vga_mode;
+ cam->nmodes = ARRAY_SIZE(vga_mode);
+ sd->block_size = 0x200;
+ }
+
+ INIT_WORK(&sd->work_struct, jl2005c_dostream);
+
+ return 0;
+}
+
+/* this function is called at probe and resume time */
+static int sd_init(struct gspca_dev *gspca_dev)
+{
+ return 0;
+}
+
+static int sd_start(struct gspca_dev *gspca_dev)
+{
+
+ struct sd *sd = (struct sd *) gspca_dev;
+ sd->cap_mode = gspca_dev->cam.cam_mode;
+
+ switch (gspca_dev->width) {
+ case 640:
+ PDEBUG(D_STREAM, "Start streaming at vga resolution");
+ jl2005c_stream_start_vga_lg(gspca_dev);
+ break;
+ case 320:
+ PDEBUG(D_STREAM, "Start streaming at qvga resolution");
+ jl2005c_stream_start_vga_small(gspca_dev);
+ break;
+ case 352:
+ PDEBUG(D_STREAM, "Start streaming at cif resolution");
+ jl2005c_stream_start_cif_lg(gspca_dev);
+ break;
+ case 176:
+ PDEBUG(D_STREAM, "Start streaming at qcif resolution");
+ jl2005c_stream_start_cif_small(gspca_dev);
+ break;
+ default:
+ pr_err("Unknown resolution specified\n");
+ return -1;
+ }
+
+ /* Start the workqueue function to do the streaming */
+ sd->work_thread = create_singlethread_workqueue(MODULE_NAME);
+ queue_work(sd->work_thread, &sd->work_struct);
+
+ 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 sq905c_dostream to finish */
+ destroy_workqueue(dev->work_thread);
+ dev->work_thread = NULL;
+ mutex_lock(&gspca_dev->usb_lock);
+}
+
+
+
+/* sub-driver description */
+static const struct sd_desc sd_desc = {
+ .name = MODULE_NAME,
+ /* .ctrls = none have been detected */
+ /* .nctrls = ARRAY_SIZE(sd_ctrls), */
+ .config = sd_config,
+ .init = sd_init,
+ .start = sd_start,
+ .stop0 = sd_stop0,
+};
+
+/* -- module initialisation -- */
+static const __devinitdata struct usb_device_id device_table[] = {
+ {USB_DEVICE(0x0979, 0x0227)},
+ {}
+};
+MODULE_DEVICE_TABLE(usb, device_table);
+
+/* -- 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;
+ return 0;
+}
+static void __exit sd_mod_exit(void)
+{
+ usb_deregister(&sd_driver);
+}
+
+module_init(sd_mod_init);
+module_exit(sd_mod_exit);
projects / GitHub / exynos8895 / android_kernel_samsung_universal8895.git / commitdiff