/* * 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 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 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) { #ifdef CONFIG_PM if (gspca_dev->frozen) break; #endif /* 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, .config = sd_config, .init = sd_init, .start = sd_start, .stop0 = sd_stop0, }; /* -- module initialisation -- */ static const 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, .reset_resume = gspca_resume, #endif }; module_usb_driver(sd_driver);