| /* |
| * usbvision-core.c - driver for NT100x USB video capture devices |
| * |
| * |
| * Copyright (c) 1999-2005 Joerg Heckenbach <joerg@heckenbach-aw.de> |
| * Dwaine Garden <dwainegarden@rogers.com> |
| * |
| * This module is part of usbvision driver project. |
| * Updates to driver completed by Dwaine P. Garden |
| * |
| * 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 |
| * (at your option) 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., 675 Mass Ave, Cambridge, MA 02139, USA. |
| */ |
| |
| #include <linux/kernel.h> |
| #include <linux/list.h> |
| #include <linux/timer.h> |
| #include <linux/slab.h> |
| #include <linux/mm.h> |
| #include <linux/utsname.h> |
| #include <linux/highmem.h> |
| #include <linux/videodev.h> |
| #include <linux/vmalloc.h> |
| #include <linux/module.h> |
| #include <linux/init.h> |
| #include <linux/spinlock.h> |
| #include <asm/io.h> |
| #include <linux/videodev2.h> |
| #include <linux/video_decoder.h> |
| #include <linux/i2c.h> |
| |
| #include <media/saa7115.h> |
| #include <media/v4l2-common.h> |
| #include <media/tuner.h> |
| #include <media/audiochip.h> |
| |
| #include <linux/workqueue.h> |
| |
| #ifdef CONFIG_KMOD |
| #include <linux/kmod.h> |
| #endif |
| |
| #include "usbvision.h" |
| |
| static unsigned int core_debug; |
| module_param(core_debug,int,0644); |
| MODULE_PARM_DESC(core_debug,"enable debug messages [core]"); |
| |
| static unsigned int force_testpattern; |
| module_param(force_testpattern,int,0644); |
| MODULE_PARM_DESC(force_testpattern,"enable test pattern display [core]"); |
| |
| static int adjustCompression = 1; /* Set the compression to be adaptive */ |
| module_param(adjustCompression, int, 0444); |
| MODULE_PARM_DESC(adjustCompression, " Set the ADPCM compression for the device. Default: 1 (On)"); |
| |
| /* To help people with Black and White output with using s-video input. |
| * Some cables and input device are wired differently. */ |
| static int SwitchSVideoInput; |
| module_param(SwitchSVideoInput, int, 0444); |
| MODULE_PARM_DESC(SwitchSVideoInput, " Set the S-Video input. Some cables and input device are wired differently. Default: 0 (Off)"); |
| |
| static unsigned int adjust_X_Offset = -1; |
| module_param(adjust_X_Offset, int, 0644); |
| MODULE_PARM_DESC(adjust_X_Offset, "adjust X offset display [core]"); |
| |
| static unsigned int adjust_Y_Offset = -1; |
| module_param(adjust_Y_Offset, int, 0644); |
| MODULE_PARM_DESC(adjust_Y_Offset, "adjust Y offset display [core]"); |
| |
| |
| #define ENABLE_HEXDUMP 0 /* Enable if you need it */ |
| |
| |
| #ifdef USBVISION_DEBUG |
| #define PDEBUG(level, fmt, args...) \ |
| if (core_debug & (level)) info("[%s:%d] " fmt, __PRETTY_FUNCTION__, __LINE__ , ## args) |
| #else |
| #define PDEBUG(level, fmt, args...) do {} while(0) |
| #endif |
| |
| #define DBG_HEADER 1<<0 |
| #define DBG_IRQ 1<<1 |
| #define DBG_ISOC 1<<2 |
| #define DBG_PARSE 1<<3 |
| #define DBG_SCRATCH 1<<4 |
| #define DBG_FUNC 1<<5 |
| |
| static const int max_imgwidth = MAX_FRAME_WIDTH; |
| static const int max_imgheight = MAX_FRAME_HEIGHT; |
| static const int min_imgwidth = MIN_FRAME_WIDTH; |
| static const int min_imgheight = MIN_FRAME_HEIGHT; |
| |
| /* The value of 'scratch_buf_size' affects quality of the picture |
| * in many ways. Shorter buffers may cause loss of data when client |
| * is too slow. Larger buffers are memory-consuming and take longer |
| * to work with. This setting can be adjusted, but the default value |
| * should be OK for most desktop users. |
| */ |
| #define DEFAULT_SCRATCH_BUF_SIZE (0x20000) // 128kB memory scratch buffer |
| static const int scratch_buf_size = DEFAULT_SCRATCH_BUF_SIZE; |
| |
| // Function prototypes |
| static int usbvision_request_intra (struct usb_usbvision *usbvision); |
| static int usbvision_unrequest_intra (struct usb_usbvision *usbvision); |
| static int usbvision_adjust_compression (struct usb_usbvision *usbvision); |
| static int usbvision_measure_bandwidth (struct usb_usbvision *usbvision); |
| |
| /*******************************/ |
| /* Memory management functions */ |
| /*******************************/ |
| |
| /* |
| * Here we want the physical address of the memory. |
| * This is used when initializing the contents of the area. |
| */ |
| |
| static void *usbvision_rvmalloc(unsigned long size) |
| { |
| void *mem; |
| unsigned long adr; |
| |
| size = PAGE_ALIGN(size); |
| mem = vmalloc_32(size); |
| if (!mem) |
| return NULL; |
| |
| memset(mem, 0, size); /* Clear the ram out, no junk to the user */ |
| adr = (unsigned long) mem; |
| while (size > 0) { |
| SetPageReserved(vmalloc_to_page((void *)adr)); |
| adr += PAGE_SIZE; |
| size -= PAGE_SIZE; |
| } |
| |
| return mem; |
| } |
| |
| static void usbvision_rvfree(void *mem, unsigned long size) |
| { |
| unsigned long adr; |
| |
| if (!mem) |
| return; |
| |
| size = PAGE_ALIGN(size); |
| |
| adr = (unsigned long) mem; |
| while ((long) size > 0) { |
| ClearPageReserved(vmalloc_to_page((void *)adr)); |
| adr += PAGE_SIZE; |
| size -= PAGE_SIZE; |
| } |
| |
| vfree(mem); |
| } |
| |
| |
| |
| #if ENABLE_HEXDUMP |
| static void usbvision_hexdump(const unsigned char *data, int len) |
| { |
| char tmp[80]; |
| int i, k; |
| |
| for (i = k = 0; len > 0; i++, len--) { |
| if (i > 0 && (i % 16 == 0)) { |
| printk("%s\n", tmp); |
| k = 0; |
| } |
| k += sprintf(&tmp[k], "%02x ", data[i]); |
| } |
| if (k > 0) |
| printk("%s\n", tmp); |
| } |
| #endif |
| |
| /******************************** |
| * scratch ring buffer handling |
| ********************************/ |
| static int scratch_len(struct usb_usbvision *usbvision) /*This returns the amount of data actually in the buffer */ |
| { |
| int len = usbvision->scratch_write_ptr - usbvision->scratch_read_ptr; |
| if (len < 0) { |
| len += scratch_buf_size; |
| } |
| PDEBUG(DBG_SCRATCH, "scratch_len() = %d\n", len); |
| |
| return len; |
| } |
| |
| |
| /* This returns the free space left in the buffer */ |
| static int scratch_free(struct usb_usbvision *usbvision) |
| { |
| int free = usbvision->scratch_read_ptr - usbvision->scratch_write_ptr; |
| if (free <= 0) { |
| free += scratch_buf_size; |
| } |
| if (free) { |
| free -= 1; /* at least one byte in the buffer must */ |
| /* left blank, otherwise there is no chance to differ between full and empty */ |
| } |
| PDEBUG(DBG_SCRATCH, "return %d\n", free); |
| |
| return free; |
| } |
| |
| |
| /* This puts data into the buffer */ |
| static int scratch_put(struct usb_usbvision *usbvision, unsigned char *data, |
| int len) |
| { |
| int len_part; |
| |
| if (usbvision->scratch_write_ptr + len < scratch_buf_size) { |
| memcpy(usbvision->scratch + usbvision->scratch_write_ptr, data, len); |
| usbvision->scratch_write_ptr += len; |
| } |
| else { |
| len_part = scratch_buf_size - usbvision->scratch_write_ptr; |
| memcpy(usbvision->scratch + usbvision->scratch_write_ptr, data, len_part); |
| if (len == len_part) { |
| usbvision->scratch_write_ptr = 0; /* just set write_ptr to zero */ |
| } |
| else { |
| memcpy(usbvision->scratch, data + len_part, len - len_part); |
| usbvision->scratch_write_ptr = len - len_part; |
| } |
| } |
| |
| PDEBUG(DBG_SCRATCH, "len=%d, new write_ptr=%d\n", len, usbvision->scratch_write_ptr); |
| |
| return len; |
| } |
| |
| /* This marks the write_ptr as position of new frame header */ |
| static void scratch_mark_header(struct usb_usbvision *usbvision) |
| { |
| PDEBUG(DBG_SCRATCH, "header at write_ptr=%d\n", usbvision->scratch_headermarker_write_ptr); |
| |
| usbvision->scratch_headermarker[usbvision->scratch_headermarker_write_ptr] = |
| usbvision->scratch_write_ptr; |
| usbvision->scratch_headermarker_write_ptr += 1; |
| usbvision->scratch_headermarker_write_ptr %= USBVISION_NUM_HEADERMARKER; |
| } |
| |
| /* This gets data from the buffer at the given "ptr" position */ |
| static int scratch_get_extra(struct usb_usbvision *usbvision, |
| unsigned char *data, int *ptr, int len) |
| { |
| int len_part; |
| if (*ptr + len < scratch_buf_size) { |
| memcpy(data, usbvision->scratch + *ptr, len); |
| *ptr += len; |
| } |
| else { |
| len_part = scratch_buf_size - *ptr; |
| memcpy(data, usbvision->scratch + *ptr, len_part); |
| if (len == len_part) { |
| *ptr = 0; /* just set the y_ptr to zero */ |
| } |
| else { |
| memcpy(data + len_part, usbvision->scratch, len - len_part); |
| *ptr = len - len_part; |
| } |
| } |
| |
| PDEBUG(DBG_SCRATCH, "len=%d, new ptr=%d\n", len, *ptr); |
| |
| return len; |
| } |
| |
| |
| /* This sets the scratch extra read pointer */ |
| static void scratch_set_extra_ptr(struct usb_usbvision *usbvision, int *ptr, |
| int len) |
| { |
| *ptr = (usbvision->scratch_read_ptr + len)%scratch_buf_size; |
| |
| PDEBUG(DBG_SCRATCH, "ptr=%d\n", *ptr); |
| } |
| |
| |
| /*This increments the scratch extra read pointer */ |
| static void scratch_inc_extra_ptr(int *ptr, int len) |
| { |
| *ptr = (*ptr + len) % scratch_buf_size; |
| |
| PDEBUG(DBG_SCRATCH, "ptr=%d\n", *ptr); |
| } |
| |
| |
| /* This gets data from the buffer */ |
| static int scratch_get(struct usb_usbvision *usbvision, unsigned char *data, |
| int len) |
| { |
| int len_part; |
| if (usbvision->scratch_read_ptr + len < scratch_buf_size) { |
| memcpy(data, usbvision->scratch + usbvision->scratch_read_ptr, len); |
| usbvision->scratch_read_ptr += len; |
| } |
| else { |
| len_part = scratch_buf_size - usbvision->scratch_read_ptr; |
| memcpy(data, usbvision->scratch + usbvision->scratch_read_ptr, len_part); |
| if (len == len_part) { |
| usbvision->scratch_read_ptr = 0; /* just set the read_ptr to zero */ |
| } |
| else { |
| memcpy(data + len_part, usbvision->scratch, len - len_part); |
| usbvision->scratch_read_ptr = len - len_part; |
| } |
| } |
| |
| PDEBUG(DBG_SCRATCH, "len=%d, new read_ptr=%d\n", len, usbvision->scratch_read_ptr); |
| |
| return len; |
| } |
| |
| |
| /* This sets read pointer to next header and returns it */ |
| static int scratch_get_header(struct usb_usbvision *usbvision, |
| struct usbvision_frame_header *header) |
| { |
| int errCode = 0; |
| |
| PDEBUG(DBG_SCRATCH, "from read_ptr=%d", usbvision->scratch_headermarker_read_ptr); |
| |
| while (usbvision->scratch_headermarker_write_ptr - |
| usbvision->scratch_headermarker_read_ptr != 0) { |
| usbvision->scratch_read_ptr = |
| usbvision->scratch_headermarker[usbvision->scratch_headermarker_read_ptr]; |
| usbvision->scratch_headermarker_read_ptr += 1; |
| usbvision->scratch_headermarker_read_ptr %= USBVISION_NUM_HEADERMARKER; |
| scratch_get(usbvision, (unsigned char *)header, USBVISION_HEADER_LENGTH); |
| if ((header->magic_1 == USBVISION_MAGIC_1) |
| && (header->magic_2 == USBVISION_MAGIC_2) |
| && (header->headerLength == USBVISION_HEADER_LENGTH)) { |
| errCode = USBVISION_HEADER_LENGTH; |
| header->frameWidth = header->frameWidthLo + (header->frameWidthHi << 8); |
| header->frameHeight = header->frameHeightLo + (header->frameHeightHi << 8); |
| break; |
| } |
| } |
| |
| return errCode; |
| } |
| |
| |
| /*This removes len bytes of old data from the buffer */ |
| static void scratch_rm_old(struct usb_usbvision *usbvision, int len) |
| { |
| |
| usbvision->scratch_read_ptr += len; |
| usbvision->scratch_read_ptr %= scratch_buf_size; |
| PDEBUG(DBG_SCRATCH, "read_ptr is now %d\n", usbvision->scratch_read_ptr); |
| } |
| |
| |
| /*This resets the buffer - kills all data in it too */ |
| static void scratch_reset(struct usb_usbvision *usbvision) |
| { |
| PDEBUG(DBG_SCRATCH, "\n"); |
| |
| usbvision->scratch_read_ptr = 0; |
| usbvision->scratch_write_ptr = 0; |
| usbvision->scratch_headermarker_read_ptr = 0; |
| usbvision->scratch_headermarker_write_ptr = 0; |
| usbvision->isocstate = IsocState_NoFrame; |
| } |
| |
| int usbvision_scratch_alloc(struct usb_usbvision *usbvision) |
| { |
| usbvision->scratch = vmalloc_32(scratch_buf_size); |
| scratch_reset(usbvision); |
| if(usbvision->scratch == NULL) { |
| err("%s: unable to allocate %d bytes for scratch", |
| __func__, scratch_buf_size); |
| return -ENOMEM; |
| } |
| return 0; |
| } |
| |
| void usbvision_scratch_free(struct usb_usbvision *usbvision) |
| { |
| if (usbvision->scratch != NULL) { |
| vfree(usbvision->scratch); |
| usbvision->scratch = NULL; |
| } |
| } |
| |
| /* |
| * usbvision_testpattern() |
| * |
| * Procedure forms a test pattern (yellow grid on blue background). |
| * |
| * Parameters: |
| * fullframe: if TRUE then entire frame is filled, otherwise the procedure |
| * continues from the current scanline. |
| * pmode 0: fill the frame with solid blue color (like on VCR or TV) |
| * 1: Draw a colored grid |
| * |
| */ |
| static void usbvision_testpattern(struct usb_usbvision *usbvision, |
| int fullframe, int pmode) |
| { |
| static const char proc[] = "usbvision_testpattern"; |
| struct usbvision_frame *frame; |
| unsigned char *f; |
| int num_cell = 0; |
| int scan_length = 0; |
| static int num_pass; |
| |
| if (usbvision == NULL) { |
| printk(KERN_ERR "%s: usbvision == NULL\n", proc); |
| return; |
| } |
| if (usbvision->curFrame == NULL) { |
| printk(KERN_ERR "%s: usbvision->curFrame is NULL.\n", proc); |
| return; |
| } |
| |
| /* Grab the current frame */ |
| frame = usbvision->curFrame; |
| |
| /* Optionally start at the beginning */ |
| if (fullframe) { |
| frame->curline = 0; |
| frame->scanlength = 0; |
| } |
| |
| /* Form every scan line */ |
| for (; frame->curline < frame->frmheight; frame->curline++) { |
| int i; |
| |
| f = frame->data + (usbvision->curwidth * 3 * frame->curline); |
| for (i = 0; i < usbvision->curwidth; i++) { |
| unsigned char cb = 0x80; |
| unsigned char cg = 0; |
| unsigned char cr = 0; |
| |
| if (pmode == 1) { |
| if (frame->curline % 32 == 0) |
| cb = 0, cg = cr = 0xFF; |
| else if (i % 32 == 0) { |
| if (frame->curline % 32 == 1) |
| num_cell++; |
| cb = 0, cg = cr = 0xFF; |
| } else { |
| cb = |
| ((num_cell * 7) + |
| num_pass) & 0xFF; |
| cg = |
| ((num_cell * 5) + |
| num_pass * 2) & 0xFF; |
| cr = |
| ((num_cell * 3) + |
| num_pass * 3) & 0xFF; |
| } |
| } else { |
| /* Just the blue screen */ |
| } |
| |
| *f++ = cb; |
| *f++ = cg; |
| *f++ = cr; |
| scan_length += 3; |
| } |
| } |
| |
| frame->grabstate = FrameState_Done; |
| frame->scanlength += scan_length; |
| ++num_pass; |
| |
| } |
| |
| /* |
| * usbvision_decompress_alloc() |
| * |
| * allocates intermediate buffer for decompression |
| */ |
| int usbvision_decompress_alloc(struct usb_usbvision *usbvision) |
| { |
| int IFB_size = MAX_FRAME_WIDTH * MAX_FRAME_HEIGHT * 3 / 2; |
| usbvision->IntraFrameBuffer = vmalloc_32(IFB_size); |
| if (usbvision->IntraFrameBuffer == NULL) { |
| err("%s: unable to allocate %d for compr. frame buffer", |
| __func__, IFB_size); |
| return -ENOMEM; |
| } |
| return 0; |
| } |
| |
| /* |
| * usbvision_decompress_free() |
| * |
| * frees intermediate buffer for decompression |
| */ |
| void usbvision_decompress_free(struct usb_usbvision *usbvision) |
| { |
| if (usbvision->IntraFrameBuffer != NULL) { |
| vfree(usbvision->IntraFrameBuffer); |
| usbvision->IntraFrameBuffer = NULL; |
| } |
| } |
| |
| /************************************************************ |
| * Here comes the data parsing stuff that is run as interrupt |
| ************************************************************/ |
| /* |
| * usbvision_find_header() |
| * |
| * Locate one of supported header markers in the scratch buffer. |
| */ |
| static enum ParseState usbvision_find_header(struct usb_usbvision *usbvision) |
| { |
| struct usbvision_frame *frame; |
| int foundHeader = 0; |
| |
| frame = usbvision->curFrame; |
| |
| while (scratch_get_header(usbvision, &frame->isocHeader) == USBVISION_HEADER_LENGTH) { |
| // found header in scratch |
| PDEBUG(DBG_HEADER, "found header: 0x%02x%02x %d %d %d %d %#x 0x%02x %u %u", |
| frame->isocHeader.magic_2, |
| frame->isocHeader.magic_1, |
| frame->isocHeader.headerLength, |
| frame->isocHeader.frameNum, |
| frame->isocHeader.framePhase, |
| frame->isocHeader.frameLatency, |
| frame->isocHeader.dataFormat, |
| frame->isocHeader.formatParam, |
| frame->isocHeader.frameWidth, |
| frame->isocHeader.frameHeight); |
| |
| if (usbvision->requestIntra) { |
| if (frame->isocHeader.formatParam & 0x80) { |
| foundHeader = 1; |
| usbvision->lastIsocFrameNum = -1; // do not check for lost frames this time |
| usbvision_unrequest_intra(usbvision); |
| break; |
| } |
| } |
| else { |
| foundHeader = 1; |
| break; |
| } |
| } |
| |
| if (foundHeader) { |
| frame->frmwidth = frame->isocHeader.frameWidth * usbvision->stretch_width; |
| frame->frmheight = frame->isocHeader.frameHeight * usbvision->stretch_height; |
| frame->v4l2_linesize = (frame->frmwidth * frame->v4l2_format.depth)>> 3; |
| } |
| else { // no header found |
| PDEBUG(DBG_HEADER, "skipping scratch data, no header"); |
| scratch_reset(usbvision); |
| return ParseState_EndParse; |
| } |
| |
| // found header |
| if (frame->isocHeader.dataFormat==ISOC_MODE_COMPRESS) { |
| //check isocHeader.frameNum for lost frames |
| if (usbvision->lastIsocFrameNum >= 0) { |
| if (((usbvision->lastIsocFrameNum + 1) % 32) != frame->isocHeader.frameNum) { |
| // unexpected frame drop: need to request new intra frame |
| PDEBUG(DBG_HEADER, "Lost frame before %d on USB", frame->isocHeader.frameNum); |
| usbvision_request_intra(usbvision); |
| return ParseState_NextFrame; |
| } |
| } |
| usbvision->lastIsocFrameNum = frame->isocHeader.frameNum; |
| } |
| usbvision->header_count++; |
| frame->scanstate = ScanState_Lines; |
| frame->curline = 0; |
| |
| if (force_testpattern) { |
| usbvision_testpattern(usbvision, 1, 1); |
| return ParseState_NextFrame; |
| } |
| return ParseState_Continue; |
| } |
| |
| static enum ParseState usbvision_parse_lines_422(struct usb_usbvision *usbvision, |
| long *pcopylen) |
| { |
| volatile struct usbvision_frame *frame; |
| unsigned char *f; |
| int len; |
| int i; |
| unsigned char yuyv[4]={180, 128, 10, 128}; // YUV components |
| unsigned char rv, gv, bv; // RGB components |
| int clipmask_index, bytes_per_pixel; |
| int stretch_bytes, clipmask_add; |
| |
| frame = usbvision->curFrame; |
| f = frame->data + (frame->v4l2_linesize * frame->curline); |
| |
| /* Make sure there's enough data for the entire line */ |
| len = (frame->isocHeader.frameWidth * 2)+5; |
| if (scratch_len(usbvision) < len) { |
| PDEBUG(DBG_PARSE, "out of data in line %d, need %u.\n", frame->curline, len); |
| return ParseState_Out; |
| } |
| |
| if ((frame->curline + 1) >= frame->frmheight) { |
| return ParseState_NextFrame; |
| } |
| |
| bytes_per_pixel = frame->v4l2_format.bytes_per_pixel; |
| stretch_bytes = (usbvision->stretch_width - 1) * bytes_per_pixel; |
| clipmask_index = frame->curline * MAX_FRAME_WIDTH; |
| clipmask_add = usbvision->stretch_width; |
| |
| for (i = 0; i < frame->frmwidth; i+=(2 * usbvision->stretch_width)) { |
| |
| scratch_get(usbvision, &yuyv[0], 4); |
| |
| if (frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) { |
| *f++ = yuyv[0]; // Y |
| *f++ = yuyv[3]; // U |
| } |
| else { |
| |
| YUV_TO_RGB_BY_THE_BOOK(yuyv[0], yuyv[1], yuyv[3], rv, gv, bv); |
| switch (frame->v4l2_format.format) { |
| case V4L2_PIX_FMT_RGB565: |
| *f++ = (0x1F & rv) | |
| (0xE0 & (gv << 5)); |
| *f++ = (0x07 & (gv >> 3)) | |
| (0xF8 & bv); |
| break; |
| case V4L2_PIX_FMT_RGB24: |
| *f++ = rv; |
| *f++ = gv; |
| *f++ = bv; |
| break; |
| case V4L2_PIX_FMT_RGB32: |
| *f++ = rv; |
| *f++ = gv; |
| *f++ = bv; |
| f++; |
| break; |
| case V4L2_PIX_FMT_RGB555: |
| *f++ = (0x1F & rv) | |
| (0xE0 & (gv << 5)); |
| *f++ = (0x03 & (gv >> 3)) | |
| (0x7C & (bv << 2)); |
| break; |
| } |
| } |
| clipmask_index += clipmask_add; |
| f += stretch_bytes; |
| |
| if (frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) { |
| *f++ = yuyv[2]; // Y |
| *f++ = yuyv[1]; // V |
| } |
| else { |
| |
| YUV_TO_RGB_BY_THE_BOOK(yuyv[2], yuyv[1], yuyv[3], rv, gv, bv); |
| switch (frame->v4l2_format.format) { |
| case V4L2_PIX_FMT_RGB565: |
| *f++ = (0x1F & rv) | |
| (0xE0 & (gv << 5)); |
| *f++ = (0x07 & (gv >> 3)) | |
| (0xF8 & bv); |
| break; |
| case V4L2_PIX_FMT_RGB24: |
| *f++ = rv; |
| *f++ = gv; |
| *f++ = bv; |
| break; |
| case V4L2_PIX_FMT_RGB32: |
| *f++ = rv; |
| *f++ = gv; |
| *f++ = bv; |
| f++; |
| break; |
| case V4L2_PIX_FMT_RGB555: |
| *f++ = (0x1F & rv) | |
| (0xE0 & (gv << 5)); |
| *f++ = (0x03 & (gv >> 3)) | |
| (0x7C & (bv << 2)); |
| break; |
| } |
| } |
| clipmask_index += clipmask_add; |
| f += stretch_bytes; |
| } |
| |
| frame->curline += usbvision->stretch_height; |
| *pcopylen += frame->v4l2_linesize * usbvision->stretch_height; |
| |
| if (frame->curline >= frame->frmheight) { |
| return ParseState_NextFrame; |
| } |
| else { |
| return ParseState_Continue; |
| } |
| } |
| |
| /* The decompression routine */ |
| static int usbvision_decompress(struct usb_usbvision *usbvision,unsigned char *Compressed, |
| unsigned char *Decompressed, int *StartPos, |
| int *BlockTypeStartPos, int Len) |
| { |
| int RestPixel, Idx, MaxPos, Pos, ExtraPos, BlockLen, BlockTypePos, BlockTypeLen; |
| unsigned char BlockByte, BlockCode, BlockType, BlockTypeByte, Integrator; |
| |
| Integrator = 0; |
| Pos = *StartPos; |
| BlockTypePos = *BlockTypeStartPos; |
| MaxPos = 396; //Pos + Len; |
| ExtraPos = Pos; |
| BlockLen = 0; |
| BlockByte = 0; |
| BlockCode = 0; |
| BlockType = 0; |
| BlockTypeByte = 0; |
| BlockTypeLen = 0; |
| RestPixel = Len; |
| |
| for (Idx = 0; Idx < Len; Idx++) { |
| |
| if (BlockLen == 0) { |
| if (BlockTypeLen==0) { |
| BlockTypeByte = Compressed[BlockTypePos]; |
| BlockTypePos++; |
| BlockTypeLen = 4; |
| } |
| BlockType = (BlockTypeByte & 0xC0) >> 6; |
| |
| //statistic: |
| usbvision->ComprBlockTypes[BlockType]++; |
| |
| Pos = ExtraPos; |
| if (BlockType == 0) { |
| if(RestPixel >= 24) { |
| Idx += 23; |
| RestPixel -= 24; |
| Integrator = Decompressed[Idx]; |
| } else { |
| Idx += RestPixel - 1; |
| RestPixel = 0; |
| } |
| } else { |
| BlockCode = Compressed[Pos]; |
| Pos++; |
| if (RestPixel >= 24) { |
| BlockLen = 24; |
| } else { |
| BlockLen = RestPixel; |
| } |
| RestPixel -= BlockLen; |
| ExtraPos = Pos + (BlockLen / 4); |
| } |
| BlockTypeByte <<= 2; |
| BlockTypeLen -= 1; |
| } |
| if (BlockLen > 0) { |
| if ((BlockLen%4) == 0) { |
| BlockByte = Compressed[Pos]; |
| Pos++; |
| } |
| if (BlockType == 1) { //inter Block |
| Integrator = Decompressed[Idx]; |
| } |
| switch (BlockByte & 0xC0) { |
| case 0x03<<6: |
| Integrator += Compressed[ExtraPos]; |
| ExtraPos++; |
| break; |
| case 0x02<<6: |
| Integrator += BlockCode; |
| break; |
| case 0x00: |
| Integrator -= BlockCode; |
| break; |
| } |
| Decompressed[Idx] = Integrator; |
| BlockByte <<= 2; |
| BlockLen -= 1; |
| } |
| } |
| *StartPos = ExtraPos; |
| *BlockTypeStartPos = BlockTypePos; |
| return Idx; |
| } |
| |
| |
| /* |
| * usbvision_parse_compress() |
| * |
| * Parse compressed frame from the scratch buffer, put |
| * decoded RGB value into the current frame buffer and add the written |
| * number of bytes (RGB) to the *pcopylen. |
| * |
| */ |
| static enum ParseState usbvision_parse_compress(struct usb_usbvision *usbvision, |
| long *pcopylen) |
| { |
| #define USBVISION_STRIP_MAGIC 0x5A |
| #define USBVISION_STRIP_LEN_MAX 400 |
| #define USBVISION_STRIP_HEADER_LEN 3 |
| |
| struct usbvision_frame *frame; |
| unsigned char *f,*u = NULL ,*v = NULL; |
| unsigned char StripData[USBVISION_STRIP_LEN_MAX]; |
| unsigned char StripHeader[USBVISION_STRIP_HEADER_LEN]; |
| int Idx, IdxEnd, StripLen, StripPtr, StartBlockPos, BlockPos, BlockTypePos; |
| int clipmask_index, bytes_per_pixel, rc; |
| int imageSize; |
| unsigned char rv, gv, bv; |
| static unsigned char *Y, *U, *V; |
| |
| frame = usbvision->curFrame; |
| imageSize = frame->frmwidth * frame->frmheight; |
| if ( (frame->v4l2_format.format == V4L2_PIX_FMT_YUV422P) || |
| (frame->v4l2_format.format == V4L2_PIX_FMT_YVU420) ) { // this is a planar format |
| //... v4l2_linesize not used here. |
| f = frame->data + (frame->width * frame->curline); |
| } else |
| f = frame->data + (frame->v4l2_linesize * frame->curline); |
| |
| if (frame->v4l2_format.format == V4L2_PIX_FMT_YUYV){ //initialise u and v pointers |
| // get base of u and b planes add halfoffset |
| |
| u = frame->data |
| + imageSize |
| + (frame->frmwidth >>1) * frame->curline ; |
| v = u + (imageSize >>1 ); |
| |
| } else if (frame->v4l2_format.format == V4L2_PIX_FMT_YVU420){ |
| |
| v = frame->data + imageSize + ((frame->curline* (frame->width))>>2) ; |
| u = v + (imageSize >>2) ; |
| } |
| |
| if (frame->curline == 0) { |
| usbvision_adjust_compression(usbvision); |
| } |
| |
| if (scratch_len(usbvision) < USBVISION_STRIP_HEADER_LEN) { |
| return ParseState_Out; |
| } |
| |
| //get strip header without changing the scratch_read_ptr |
| scratch_set_extra_ptr(usbvision, &StripPtr, 0); |
| scratch_get_extra(usbvision, &StripHeader[0], &StripPtr, |
| USBVISION_STRIP_HEADER_LEN); |
| |
| if (StripHeader[0] != USBVISION_STRIP_MAGIC) { |
| // wrong strip magic |
| usbvision->stripMagicErrors++; |
| return ParseState_NextFrame; |
| } |
| |
| if (frame->curline != (int)StripHeader[2]) { |
| //line number missmatch error |
| usbvision->stripLineNumberErrors++; |
| } |
| |
| StripLen = 2 * (unsigned int)StripHeader[1]; |
| if (StripLen > USBVISION_STRIP_LEN_MAX) { |
| // strip overrun |
| // I think this never happens |
| usbvision_request_intra(usbvision); |
| } |
| |
| if (scratch_len(usbvision) < StripLen) { |
| //there is not enough data for the strip |
| return ParseState_Out; |
| } |
| |
| if (usbvision->IntraFrameBuffer) { |
| Y = usbvision->IntraFrameBuffer + frame->frmwidth * frame->curline; |
| U = usbvision->IntraFrameBuffer + imageSize + (frame->frmwidth / 2) * (frame->curline / 2); |
| V = usbvision->IntraFrameBuffer + imageSize / 4 * 5 + (frame->frmwidth / 2) * (frame->curline / 2); |
| } |
| else { |
| return ParseState_NextFrame; |
| } |
| |
| bytes_per_pixel = frame->v4l2_format.bytes_per_pixel; |
| clipmask_index = frame->curline * MAX_FRAME_WIDTH; |
| |
| scratch_get(usbvision, StripData, StripLen); |
| |
| IdxEnd = frame->frmwidth; |
| BlockTypePos = USBVISION_STRIP_HEADER_LEN; |
| StartBlockPos = BlockTypePos + (IdxEnd - 1) / 96 + (IdxEnd / 2 - 1) / 96 + 2; |
| BlockPos = StartBlockPos; |
| |
| usbvision->BlockPos = BlockPos; |
| |
| if ((rc = usbvision_decompress(usbvision, StripData, Y, &BlockPos, &BlockTypePos, IdxEnd)) != IdxEnd) { |
| //return ParseState_Continue; |
| } |
| if (StripLen > usbvision->maxStripLen) { |
| usbvision->maxStripLen = StripLen; |
| } |
| |
| if (frame->curline%2) { |
| if ((rc = usbvision_decompress(usbvision, StripData, V, &BlockPos, &BlockTypePos, IdxEnd/2)) != IdxEnd/2) { |
| //return ParseState_Continue; |
| } |
| } |
| else { |
| if ((rc = usbvision_decompress(usbvision, StripData, U, &BlockPos, &BlockTypePos, IdxEnd/2)) != IdxEnd/2) { |
| //return ParseState_Continue; |
| } |
| } |
| |
| if (BlockPos > usbvision->comprBlockPos) { |
| usbvision->comprBlockPos = BlockPos; |
| } |
| if (BlockPos > StripLen) { |
| usbvision->stripLenErrors++; |
| } |
| |
| for (Idx = 0; Idx < IdxEnd; Idx++) { |
| if(frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) { |
| *f++ = Y[Idx]; |
| *f++ = Idx & 0x01 ? U[Idx/2] : V[Idx/2]; |
| } |
| else if(frame->v4l2_format.format == V4L2_PIX_FMT_YUV422P) { |
| *f++ = Y[Idx]; |
| if ( Idx & 0x01) |
| *u++ = U[Idx>>1] ; |
| else |
| *v++ = V[Idx>>1]; |
| } |
| else if (frame->v4l2_format.format == V4L2_PIX_FMT_YVU420) { |
| *f++ = Y [Idx]; |
| if ( !(( Idx & 0x01 ) | ( frame->curline & 0x01 )) ){ |
| |
| /* only need do this for 1 in 4 pixels */ |
| /* intraframe buffer is YUV420 format */ |
| |
| *u++ = U[Idx >>1]; |
| *v++ = V[Idx >>1]; |
| } |
| |
| } |
| else { |
| YUV_TO_RGB_BY_THE_BOOK(Y[Idx], U[Idx/2], V[Idx/2], rv, gv, bv); |
| switch (frame->v4l2_format.format) { |
| case V4L2_PIX_FMT_GREY: |
| *f++ = Y[Idx]; |
| break; |
| case V4L2_PIX_FMT_RGB555: |
| *f++ = (0x1F & rv) | |
| (0xE0 & (gv << 5)); |
| *f++ = (0x03 & (gv >> 3)) | |
| (0x7C & (bv << 2)); |
| break; |
| case V4L2_PIX_FMT_RGB565: |
| *f++ = (0x1F & rv) | |
| (0xE0 & (gv << 5)); |
| *f++ = (0x07 & (gv >> 3)) | |
| (0xF8 & bv); |
| break; |
| case V4L2_PIX_FMT_RGB24: |
| *f++ = rv; |
| *f++ = gv; |
| *f++ = bv; |
| break; |
| case V4L2_PIX_FMT_RGB32: |
| *f++ = rv; |
| *f++ = gv; |
| *f++ = bv; |
| f++; |
| break; |
| } |
| } |
| clipmask_index++; |
| } |
| /* Deal with non-integer no. of bytes for YUV420P */ |
| if (frame->v4l2_format.format != V4L2_PIX_FMT_YVU420 ) |
| *pcopylen += frame->v4l2_linesize; |
| else |
| *pcopylen += frame->curline & 0x01 ? frame->v4l2_linesize : frame->v4l2_linesize << 1; |
| |
| frame->curline += 1; |
| |
| if (frame->curline >= frame->frmheight) { |
| return ParseState_NextFrame; |
| } |
| else { |
| return ParseState_Continue; |
| } |
| |
| } |
| |
| |
| /* |
| * usbvision_parse_lines_420() |
| * |
| * Parse two lines from the scratch buffer, put |
| * decoded RGB value into the current frame buffer and add the written |
| * number of bytes (RGB) to the *pcopylen. |
| * |
| */ |
| static enum ParseState usbvision_parse_lines_420(struct usb_usbvision *usbvision, |
| long *pcopylen) |
| { |
| struct usbvision_frame *frame; |
| unsigned char *f_even = NULL, *f_odd = NULL; |
| unsigned int pixel_per_line, block; |
| int pixel, block_split; |
| int y_ptr, u_ptr, v_ptr, y_odd_offset; |
| const int y_block_size = 128; |
| const int uv_block_size = 64; |
| const int sub_block_size = 32; |
| const int y_step[] = { 0, 0, 0, 2 }, y_step_size = 4; |
| const int uv_step[]= { 0, 0, 0, 4 }, uv_step_size = 4; |
| unsigned char y[2], u, v; /* YUV components */ |
| int y_, u_, v_, vb, uvg, ur; |
| int r_, g_, b_; /* RGB components */ |
| unsigned char g; |
| int clipmask_even_index, clipmask_odd_index, bytes_per_pixel; |
| int clipmask_add, stretch_bytes; |
| |
| frame = usbvision->curFrame; |
| f_even = frame->data + (frame->v4l2_linesize * frame->curline); |
| f_odd = f_even + frame->v4l2_linesize * usbvision->stretch_height; |
| |
| /* Make sure there's enough data for the entire line */ |
| /* In this mode usbvision transfer 3 bytes for every 2 pixels */ |
| /* I need two lines to decode the color */ |
| bytes_per_pixel = frame->v4l2_format.bytes_per_pixel; |
| stretch_bytes = (usbvision->stretch_width - 1) * bytes_per_pixel; |
| clipmask_even_index = frame->curline * MAX_FRAME_WIDTH; |
| clipmask_odd_index = clipmask_even_index + MAX_FRAME_WIDTH; |
| clipmask_add = usbvision->stretch_width; |
| pixel_per_line = frame->isocHeader.frameWidth; |
| |
| if (scratch_len(usbvision) < (int)pixel_per_line * 3) { |
| //printk(KERN_DEBUG "out of data, need %d\n", len); |
| return ParseState_Out; |
| } |
| |
| if ((frame->curline + 1) >= frame->frmheight) { |
| return ParseState_NextFrame; |
| } |
| |
| block_split = (pixel_per_line%y_block_size) ? 1 : 0; //are some blocks splitted into different lines? |
| |
| y_odd_offset = (pixel_per_line / y_block_size) * (y_block_size + uv_block_size) |
| + block_split * uv_block_size; |
| |
| scratch_set_extra_ptr(usbvision, &y_ptr, y_odd_offset); |
| scratch_set_extra_ptr(usbvision, &u_ptr, y_block_size); |
| scratch_set_extra_ptr(usbvision, &v_ptr, y_odd_offset |
| + (4 - block_split) * sub_block_size); |
| |
| for (block = 0; block < (pixel_per_line / sub_block_size); |
| block++) { |
| |
| |
| for (pixel = 0; pixel < sub_block_size; pixel +=2) { |
| scratch_get(usbvision, &y[0], 2); |
| scratch_get_extra(usbvision, &u, &u_ptr, 1); |
| scratch_get_extra(usbvision, &v, &v_ptr, 1); |
| |
| //I don't use the YUV_TO_RGB macro for better performance |
| v_ = v - 128; |
| u_ = u - 128; |
| vb = 132252 * v_; |
| uvg= -53281 * u_ - 25625 * v_; |
| ur = 104595 * u_; |
| |
| if(frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) { |
| *f_even++ = y[0]; |
| *f_even++ = v; |
| } |
| else { |
| y_ = 76284 * (y[0] - 16); |
| |
| b_ = (y_ + vb) >> 16; |
| g_ = (y_ + uvg)>> 16; |
| r_ = (y_ + ur) >> 16; |
| |
| switch (frame->v4l2_format.format) { |
| case V4L2_PIX_FMT_RGB565: |
| g = LIMIT_RGB(g_); |
| *f_even++ = |
| (0x1F & LIMIT_RGB(r_)) | |
| (0xE0 & (g << 5)); |
| *f_even++ = |
| (0x07 & (g >> 3)) | |
| (0xF8 & LIMIT_RGB(b_)); |
| break; |
| case V4L2_PIX_FMT_RGB24: |
| *f_even++ = LIMIT_RGB(r_); |
| *f_even++ = LIMIT_RGB(g_); |
| *f_even++ = LIMIT_RGB(b_); |
| break; |
| case V4L2_PIX_FMT_RGB32: |
| *f_even++ = LIMIT_RGB(r_); |
| *f_even++ = LIMIT_RGB(g_); |
| *f_even++ = LIMIT_RGB(b_); |
| f_even++; |
| break; |
| case V4L2_PIX_FMT_RGB555: |
| g = LIMIT_RGB(g_); |
| *f_even++ = (0x1F & LIMIT_RGB(r_)) | |
| (0xE0 & (g << 5)); |
| *f_even++ = (0x03 & (g >> 3)) | |
| (0x7C & (LIMIT_RGB(b_) << 2)); |
| break; |
| } |
| } |
| clipmask_even_index += clipmask_add; |
| f_even += stretch_bytes; |
| |
| if(frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) { |
| *f_even++ = y[1]; |
| *f_even++ = u; |
| } |
| else { |
| y_ = 76284 * (y[1] - 16); |
| |
| b_ = (y_ + vb) >> 16; |
| g_ = (y_ + uvg)>> 16; |
| r_ = (y_ + ur) >> 16; |
| |
| switch (frame->v4l2_format.format) { |
| case V4L2_PIX_FMT_RGB565: |
| g = LIMIT_RGB(g_); |
| *f_even++ = |
| (0x1F & LIMIT_RGB(r_)) | |
| (0xE0 & (g << 5)); |
| *f_even++ = |
| (0x07 & (g >> 3)) | |
| (0xF8 & LIMIT_RGB(b_)); |
| break; |
| case V4L2_PIX_FMT_RGB24: |
| *f_even++ = LIMIT_RGB(r_); |
| *f_even++ = LIMIT_RGB(g_); |
| *f_even++ = LIMIT_RGB(b_); |
| break; |
| case V4L2_PIX_FMT_RGB32: |
| *f_even++ = LIMIT_RGB(r_); |
| *f_even++ = LIMIT_RGB(g_); |
| *f_even++ = LIMIT_RGB(b_); |
| f_even++; |
| break; |
| case V4L2_PIX_FMT_RGB555: |
| g = LIMIT_RGB(g_); |
| *f_even++ = (0x1F & LIMIT_RGB(r_)) | |
| (0xE0 & (g << 5)); |
| *f_even++ = (0x03 & (g >> 3)) | |
| (0x7C & (LIMIT_RGB(b_) << 2)); |
| break; |
| } |
| } |
| clipmask_even_index += clipmask_add; |
| f_even += stretch_bytes; |
| |
| scratch_get_extra(usbvision, &y[0], &y_ptr, 2); |
| |
| if(frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) { |
| *f_odd++ = y[0]; |
| *f_odd++ = v; |
| } |
| else { |
| y_ = 76284 * (y[0] - 16); |
| |
| b_ = (y_ + vb) >> 16; |
| g_ = (y_ + uvg)>> 16; |
| r_ = (y_ + ur) >> 16; |
| |
| switch (frame->v4l2_format.format) { |
| case V4L2_PIX_FMT_RGB565: |
| g = LIMIT_RGB(g_); |
| *f_odd++ = |
| (0x1F & LIMIT_RGB(r_)) | |
| (0xE0 & (g << 5)); |
| *f_odd++ = |
| (0x07 & (g >> 3)) | |
| (0xF8 & LIMIT_RGB(b_)); |
| break; |
| case V4L2_PIX_FMT_RGB24: |
| *f_odd++ = LIMIT_RGB(r_); |
| *f_odd++ = LIMIT_RGB(g_); |
| *f_odd++ = LIMIT_RGB(b_); |
| break; |
| case V4L2_PIX_FMT_RGB32: |
| *f_odd++ = LIMIT_RGB(r_); |
| *f_odd++ = LIMIT_RGB(g_); |
| *f_odd++ = LIMIT_RGB(b_); |
| f_odd++; |
| break; |
| case V4L2_PIX_FMT_RGB555: |
| g = LIMIT_RGB(g_); |
| *f_odd++ = (0x1F & LIMIT_RGB(r_)) | |
| (0xE0 & (g << 5)); |
| *f_odd++ = (0x03 & (g >> 3)) | |
| (0x7C & (LIMIT_RGB(b_) << 2)); |
| break; |
| } |
| } |
| clipmask_odd_index += clipmask_add; |
| f_odd += stretch_bytes; |
| |
| if(frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) { |
| *f_odd++ = y[1]; |
| *f_odd++ = u; |
| } |
| else { |
| y_ = 76284 * (y[1] - 16); |
| |
| b_ = (y_ + vb) >> 16; |
| g_ = (y_ + uvg)>> 16; |
| r_ = (y_ + ur) >> 16; |
| |
| switch (frame->v4l2_format.format) { |
| case V4L2_PIX_FMT_RGB565: |
| g = LIMIT_RGB(g_); |
| *f_odd++ = |
| (0x1F & LIMIT_RGB(r_)) | |
| (0xE0 & (g << 5)); |
| *f_odd++ = |
| (0x07 & (g >> 3)) | |
| (0xF8 & LIMIT_RGB(b_)); |
| break; |
| case V4L2_PIX_FMT_RGB24: |
| *f_odd++ = LIMIT_RGB(r_); |
| *f_odd++ = LIMIT_RGB(g_); |
| *f_odd++ = LIMIT_RGB(b_); |
| break; |
| case V4L2_PIX_FMT_RGB32: |
| *f_odd++ = LIMIT_RGB(r_); |
| *f_odd++ = LIMIT_RGB(g_); |
| *f_odd++ = LIMIT_RGB(b_); |
| f_odd++; |
| break; |
| case V4L2_PIX_FMT_RGB555: |
| g = LIMIT_RGB(g_); |
| *f_odd++ = (0x1F & LIMIT_RGB(r_)) | |
| (0xE0 & (g << 5)); |
| *f_odd++ = (0x03 & (g >> 3)) | |
| (0x7C & (LIMIT_RGB(b_) << 2)); |
| break; |
| } |
| } |
| clipmask_odd_index += clipmask_add; |
| f_odd += stretch_bytes; |
| } |
| |
| scratch_rm_old(usbvision,y_step[block % y_step_size] * sub_block_size); |
| scratch_inc_extra_ptr(&y_ptr, y_step[(block + 2 * block_split) % y_step_size] |
| * sub_block_size); |
| scratch_inc_extra_ptr(&u_ptr, uv_step[block % uv_step_size] |
| * sub_block_size); |
| scratch_inc_extra_ptr(&v_ptr, uv_step[(block + 2 * block_split) % uv_step_size] |
| * sub_block_size); |
| } |
| |
| scratch_rm_old(usbvision, pixel_per_line * 3 / 2 |
| + block_split * sub_block_size); |
| |
| frame->curline += 2 * usbvision->stretch_height; |
| *pcopylen += frame->v4l2_linesize * 2 * usbvision->stretch_height; |
| |
| if (frame->curline >= frame->frmheight) |
| return ParseState_NextFrame; |
| else |
| return ParseState_Continue; |
| } |
| |
| /* |
| * usbvision_parse_data() |
| * |
| * Generic routine to parse the scratch buffer. It employs either |
| * usbvision_find_header() or usbvision_parse_lines() to do most |
| * of work. |
| * |
| */ |
| static void usbvision_parse_data(struct usb_usbvision *usbvision) |
| { |
| struct usbvision_frame *frame; |
| enum ParseState newstate; |
| long copylen = 0; |
| unsigned long lock_flags; |
| |
| frame = usbvision->curFrame; |
| |
| PDEBUG(DBG_PARSE, "parsing len=%d\n", scratch_len(usbvision)); |
| |
| while (1) { |
| |
| newstate = ParseState_Out; |
| if (scratch_len(usbvision)) { |
| if (frame->scanstate == ScanState_Scanning) { |
| newstate = usbvision_find_header(usbvision); |
| } |
| else if (frame->scanstate == ScanState_Lines) { |
| if (usbvision->isocMode == ISOC_MODE_YUV420) { |
| newstate = usbvision_parse_lines_420(usbvision, ©len); |
| } |
| else if (usbvision->isocMode == ISOC_MODE_YUV422) { |
| newstate = usbvision_parse_lines_422(usbvision, ©len); |
| } |
| else if (usbvision->isocMode == ISOC_MODE_COMPRESS) { |
| newstate = usbvision_parse_compress(usbvision, ©len); |
| } |
| |
| } |
| } |
| if (newstate == ParseState_Continue) { |
| continue; |
| } |
| else if ((newstate == ParseState_NextFrame) || (newstate == ParseState_Out)) { |
| break; |
| } |
| else { |
| return; /* ParseState_EndParse */ |
| } |
| } |
| |
| if (newstate == ParseState_NextFrame) { |
| frame->grabstate = FrameState_Done; |
| do_gettimeofday(&(frame->timestamp)); |
| frame->sequence = usbvision->frame_num; |
| |
| spin_lock_irqsave(&usbvision->queue_lock, lock_flags); |
| list_move_tail(&(frame->frame), &usbvision->outqueue); |
| usbvision->curFrame = NULL; |
| spin_unlock_irqrestore(&usbvision->queue_lock, lock_flags); |
| |
| usbvision->frame_num++; |
| |
| /* This will cause the process to request another frame. */ |
| if (waitqueue_active(&usbvision->wait_frame)) { |
| PDEBUG(DBG_PARSE, "Wake up !"); |
| wake_up_interruptible(&usbvision->wait_frame); |
| } |
| } |
| else |
| frame->grabstate = FrameState_Grabbing; |
| |
| |
| /* Update the frame's uncompressed length. */ |
| frame->scanlength += copylen; |
| } |
| |
| |
| /* |
| * Make all of the blocks of data contiguous |
| */ |
| static int usbvision_compress_isochronous(struct usb_usbvision *usbvision, |
| struct urb *urb) |
| { |
| unsigned char *packet_data; |
| int i, totlen = 0; |
| |
| for (i = 0; i < urb->number_of_packets; i++) { |
| int packet_len = urb->iso_frame_desc[i].actual_length; |
| int packet_stat = urb->iso_frame_desc[i].status; |
| |
| packet_data = urb->transfer_buffer + urb->iso_frame_desc[i].offset; |
| |
| /* Detect and ignore errored packets */ |
| if (packet_stat) { // packet_stat != 0 ????????????? |
| PDEBUG(DBG_ISOC, "data error: [%d] len=%d, status=%X", i, packet_len, packet_stat); |
| usbvision->isocErrCount++; |
| continue; |
| } |
| |
| /* Detect and ignore empty packets */ |
| if (packet_len < 0) { |
| PDEBUG(DBG_ISOC, "error packet [%d]", i); |
| usbvision->isocSkipCount++; |
| continue; |
| } |
| else if (packet_len == 0) { /* Frame end ????? */ |
| PDEBUG(DBG_ISOC, "null packet [%d]", i); |
| usbvision->isocstate=IsocState_NoFrame; |
| usbvision->isocSkipCount++; |
| continue; |
| } |
| else if (packet_len > usbvision->isocPacketSize) { |
| PDEBUG(DBG_ISOC, "packet[%d] > isocPacketSize", i); |
| usbvision->isocSkipCount++; |
| continue; |
| } |
| |
| PDEBUG(DBG_ISOC, "packet ok [%d] len=%d", i, packet_len); |
| |
| if (usbvision->isocstate==IsocState_NoFrame) { //new frame begins |
| usbvision->isocstate=IsocState_InFrame; |
| scratch_mark_header(usbvision); |
| usbvision_measure_bandwidth(usbvision); |
| PDEBUG(DBG_ISOC, "packet with header"); |
| } |
| |
| /* |
| * If usbvision continues to feed us with data but there is no |
| * consumption (if, for example, V4L client fell asleep) we |
| * may overflow the buffer. We have to move old data over to |
| * free room for new data. This is bad for old data. If we |
| * just drop new data then it's bad for new data... choose |
| * your favorite evil here. |
| */ |
| if (scratch_free(usbvision) < packet_len) { |
| |
| usbvision->scratch_ovf_count++; |
| PDEBUG(DBG_ISOC, "scratch buf overflow! scr_len: %d, n: %d", |
| scratch_len(usbvision), packet_len); |
| scratch_rm_old(usbvision, packet_len - scratch_free(usbvision)); |
| } |
| |
| /* Now we know that there is enough room in scratch buffer */ |
| scratch_put(usbvision, packet_data, packet_len); |
| totlen += packet_len; |
| usbvision->isocDataCount += packet_len; |
| usbvision->isocPacketCount++; |
| } |
| #if ENABLE_HEXDUMP |
| if (totlen > 0) { |
| static int foo; |
| if (foo < 1) { |
| printk(KERN_DEBUG "+%d.\n", usbvision->scratchlen); |
| usbvision_hexdump(data0, (totlen > 64) ? 64 : totlen); |
| ++foo; |
| } |
| } |
| #endif |
| return totlen; |
| } |
| |
| static void usbvision_isocIrq(struct urb *urb) |
| { |
| int errCode = 0; |
| int len; |
| struct usb_usbvision *usbvision = urb->context; |
| int i; |
| unsigned long startTime = jiffies; |
| struct usbvision_frame **f; |
| |
| /* We don't want to do anything if we are about to be removed! */ |
| if (!USBVISION_IS_OPERATIONAL(usbvision)) |
| return; |
| |
| /* any urb with wrong status is ignored without acknowledgement */ |
| if (urb->status == -ENOENT) { |
| return; |
| } |
| |
| f = &usbvision->curFrame; |
| |
| /* Manage streaming interruption */ |
| if (usbvision->streaming == Stream_Interrupt) { |
| usbvision->streaming = Stream_Idle; |
| if ((*f)) { |
| (*f)->grabstate = FrameState_Ready; |
| (*f)->scanstate = ScanState_Scanning; |
| } |
| PDEBUG(DBG_IRQ, "stream interrupted"); |
| wake_up_interruptible(&usbvision->wait_stream); |
| } |
| |
| /* Copy the data received into our scratch buffer */ |
| len = usbvision_compress_isochronous(usbvision, urb); |
| |
| usbvision->isocUrbCount++; |
| usbvision->urb_length = len; |
| |
| if (usbvision->streaming == Stream_On) { |
| |
| /* If we collected enough data let's parse! */ |
| if ((scratch_len(usbvision) > USBVISION_HEADER_LENGTH) && |
| (!list_empty(&(usbvision->inqueue))) ) { |
| if (!(*f)) { |
| (*f) = list_entry(usbvision->inqueue.next, |
| struct usbvision_frame, |
| frame); |
| } |
| usbvision_parse_data(usbvision); |
| } |
| else { |
| /*If we don't have a frame |
| we're current working on, complain */ |
| PDEBUG(DBG_IRQ, |
| "received data, but no one needs it"); |
| scratch_reset(usbvision); |
| } |
| } |
| else { |
| PDEBUG(DBG_IRQ, "received data, but no one needs it"); |
| scratch_reset(usbvision); |
| } |
| |
| usbvision->timeInIrq += jiffies - startTime; |
| |
| for (i = 0; i < USBVISION_URB_FRAMES; i++) { |
| urb->iso_frame_desc[i].status = 0; |
| urb->iso_frame_desc[i].actual_length = 0; |
| } |
| |
| urb->status = 0; |
| urb->dev = usbvision->dev; |
| errCode = usb_submit_urb (urb, GFP_ATOMIC); |
| |
| if(errCode) { |
| err("%s: usb_submit_urb failed: error %d", |
| __func__, errCode); |
| } |
| |
| return; |
| } |
| |
| /*************************************/ |
| /* Low level usbvision access functions */ |
| /*************************************/ |
| |
| /* |
| * usbvision_read_reg() |
| * |
| * return < 0 -> Error |
| * >= 0 -> Data |
| */ |
| |
| int usbvision_read_reg(struct usb_usbvision *usbvision, unsigned char reg) |
| { |
| int errCode = 0; |
| unsigned char buffer[1]; |
| |
| if (!USBVISION_IS_OPERATIONAL(usbvision)) |
| return -1; |
| |
| errCode = usb_control_msg(usbvision->dev, usb_rcvctrlpipe(usbvision->dev, 1), |
| USBVISION_OP_CODE, |
| USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT, |
| 0, (__u16) reg, buffer, 1, HZ); |
| |
| if (errCode < 0) { |
| err("%s: failed: error %d", __func__, errCode); |
| return errCode; |
| } |
| return buffer[0]; |
| } |
| |
| /* |
| * usbvision_write_reg() |
| * |
| * return 1 -> Reg written |
| * 0 -> usbvision is not yet ready |
| * -1 -> Something went wrong |
| */ |
| |
| int usbvision_write_reg(struct usb_usbvision *usbvision, unsigned char reg, |
| unsigned char value) |
| { |
| int errCode = 0; |
| |
| if (!USBVISION_IS_OPERATIONAL(usbvision)) |
| return 0; |
| |
| errCode = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1), |
| USBVISION_OP_CODE, |
| USB_DIR_OUT | USB_TYPE_VENDOR | |
| USB_RECIP_ENDPOINT, 0, (__u16) reg, &value, 1, HZ); |
| |
| if (errCode < 0) { |
| err("%s: failed: error %d", __func__, errCode); |
| } |
| return errCode; |
| } |
| |
| |
| static void usbvision_ctrlUrb_complete(struct urb *urb) |
| { |
| struct usb_usbvision *usbvision = (struct usb_usbvision *)urb->context; |
| |
| PDEBUG(DBG_IRQ, ""); |
| usbvision->ctrlUrbBusy = 0; |
| if (waitqueue_active(&usbvision->ctrlUrb_wq)) { |
| wake_up_interruptible(&usbvision->ctrlUrb_wq); |
| } |
| } |
| |
| |
| static int usbvision_write_reg_irq(struct usb_usbvision *usbvision,int address, |
| unsigned char *data, int len) |
| { |
| int errCode = 0; |
| |
| PDEBUG(DBG_IRQ, ""); |
| if (len > 8) { |
| return -EFAULT; |
| } |
| if (usbvision->ctrlUrbBusy) { |
| return -EBUSY; |
| } |
| usbvision->ctrlUrbBusy = 1; |
| |
| usbvision->ctrlUrbSetup.bRequestType = USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT; |
| usbvision->ctrlUrbSetup.bRequest = USBVISION_OP_CODE; |
| usbvision->ctrlUrbSetup.wValue = 0; |
| usbvision->ctrlUrbSetup.wIndex = cpu_to_le16(address); |
| usbvision->ctrlUrbSetup.wLength = cpu_to_le16(len); |
| usb_fill_control_urb (usbvision->ctrlUrb, usbvision->dev, |
| usb_sndctrlpipe(usbvision->dev, 1), |
| (unsigned char *)&usbvision->ctrlUrbSetup, |
| (void *)usbvision->ctrlUrbBuffer, len, |
| usbvision_ctrlUrb_complete, |
| (void *)usbvision); |
| |
| memcpy(usbvision->ctrlUrbBuffer, data, len); |
| |
| errCode = usb_submit_urb(usbvision->ctrlUrb, GFP_ATOMIC); |
| if (errCode < 0) { |
| // error in usb_submit_urb() |
| usbvision->ctrlUrbBusy = 0; |
| } |
| PDEBUG(DBG_IRQ, "submit %d byte: error %d", len, errCode); |
| return errCode; |
| } |
| |
| |
| static int usbvision_init_compression(struct usb_usbvision *usbvision) |
| { |
| int errCode = 0; |
| |
| usbvision->lastIsocFrameNum = -1; |
| usbvision->isocDataCount = 0; |
| usbvision->isocPacketCount = 0; |
| usbvision->isocSkipCount = 0; |
| usbvision->comprLevel = 50; |
| usbvision->lastComprLevel = -1; |
| usbvision->isocUrbCount = 0; |
| usbvision->requestIntra = 1; |
| usbvision->isocMeasureBandwidthCount = 0; |
| |
| return errCode; |
| } |
| |
| /* this function measures the used bandwidth since last call |
| * return: 0 : no error |
| * sets usedBandwidth to 1-100 : 1-100% of full bandwidth resp. to isocPacketSize |
| */ |
| static int usbvision_measure_bandwidth (struct usb_usbvision *usbvision) |
| { |
| int errCode = 0; |
| |
| if (usbvision->isocMeasureBandwidthCount < 2) { // this gives an average bandwidth of 3 frames |
| usbvision->isocMeasureBandwidthCount++; |
| return errCode; |
| } |
| if ((usbvision->isocPacketSize > 0) && (usbvision->isocPacketCount > 0)) { |
| usbvision->usedBandwidth = usbvision->isocDataCount / |
| (usbvision->isocPacketCount + usbvision->isocSkipCount) * |
| 100 / usbvision->isocPacketSize; |
| } |
| usbvision->isocMeasureBandwidthCount = 0; |
| usbvision->isocDataCount = 0; |
| usbvision->isocPacketCount = 0; |
| usbvision->isocSkipCount = 0; |
| return errCode; |
| } |
| |
| static int usbvision_adjust_compression (struct usb_usbvision *usbvision) |
| { |
| int errCode = 0; |
| unsigned char buffer[6]; |
| |
| PDEBUG(DBG_IRQ, ""); |
| if ((adjustCompression) && (usbvision->usedBandwidth > 0)) { |
| usbvision->comprLevel += (usbvision->usedBandwidth - 90) / 2; |
| RESTRICT_TO_RANGE(usbvision->comprLevel, 0, 100); |
| if (usbvision->comprLevel != usbvision->lastComprLevel) { |
| int distorsion; |
| if (usbvision->bridgeType == BRIDGE_NT1004 || usbvision->bridgeType == BRIDGE_NT1005) { |
| buffer[0] = (unsigned char)(4 + 16 * usbvision->comprLevel / 100); // PCM Threshold 1 |
| buffer[1] = (unsigned char)(4 + 8 * usbvision->comprLevel / 100); // PCM Threshold 2 |
| distorsion = 7 + 248 * usbvision->comprLevel / 100; |
| buffer[2] = (unsigned char)(distorsion & 0xFF); // Average distorsion Threshold (inter) |
| buffer[3] = (unsigned char)(distorsion & 0xFF); // Average distorsion Threshold (intra) |
| distorsion = 1 + 42 * usbvision->comprLevel / 100; |
| buffer[4] = (unsigned char)(distorsion & 0xFF); // Maximum distorsion Threshold (inter) |
| buffer[5] = (unsigned char)(distorsion & 0xFF); // Maximum distorsion Threshold (intra) |
| } |
| else { //BRIDGE_NT1003 |
| buffer[0] = (unsigned char)(4 + 16 * usbvision->comprLevel / 100); // PCM threshold 1 |
| buffer[1] = (unsigned char)(4 + 8 * usbvision->comprLevel / 100); // PCM threshold 2 |
| distorsion = 2 + 253 * usbvision->comprLevel / 100; |
| buffer[2] = (unsigned char)(distorsion & 0xFF); // distorsion threshold bit0-7 |
| buffer[3] = 0; //(unsigned char)((distorsion >> 8) & 0x0F); // distorsion threshold bit 8-11 |
| distorsion = 0 + 43 * usbvision->comprLevel / 100; |
| buffer[4] = (unsigned char)(distorsion & 0xFF); // maximum distorsion bit0-7 |
| buffer[5] = 0; //(unsigned char)((distorsion >> 8) & 0x01); // maximum distorsion bit 8 |
| } |
| errCode = usbvision_write_reg_irq(usbvision, USBVISION_PCM_THR1, buffer, 6); |
| if (errCode == 0){ |
| PDEBUG(DBG_IRQ, "new compr params %#02x %#02x %#02x %#02x %#02x %#02x", buffer[0], |
| buffer[1], buffer[2], buffer[3], buffer[4], buffer[5]); |
| usbvision->lastComprLevel = usbvision->comprLevel; |
| } |
| } |
| } |
| return errCode; |
| } |
| |
| static int usbvision_request_intra (struct usb_usbvision *usbvision) |
| { |
| int errCode = 0; |
| unsigned char buffer[1]; |
| |
| PDEBUG(DBG_IRQ, ""); |
| usbvision->requestIntra = 1; |
| buffer[0] = 1; |
| usbvision_write_reg_irq(usbvision, USBVISION_FORCE_INTRA, buffer, 1); |
| return errCode; |
| } |
| |
| static int usbvision_unrequest_intra (struct usb_usbvision *usbvision) |
| { |
| int errCode = 0; |
| unsigned char buffer[1]; |
| |
| PDEBUG(DBG_IRQ, ""); |
| usbvision->requestIntra = 0; |
| buffer[0] = 0; |
| usbvision_write_reg_irq(usbvision, USBVISION_FORCE_INTRA, buffer, 1); |
| return errCode; |
| } |
| |
| /******************************* |
| * usbvision utility functions |
| *******************************/ |
| |
| int usbvision_power_off(struct usb_usbvision *usbvision) |
| { |
| int errCode = 0; |
| |
| PDEBUG(DBG_FUNC, ""); |
| |
| errCode = usbvision_write_reg(usbvision, USBVISION_PWR_REG, USBVISION_SSPND_EN); |
| if (errCode == 1) { |
| usbvision->power = 0; |
| } |
| PDEBUG(DBG_FUNC, "%s: errCode %d", (errCode!=1)?"ERROR":"power is off", errCode); |
| return errCode; |
| } |
| |
| /* |
| * usbvision_set_video_format() |
| * |
| */ |
| static int usbvision_set_video_format(struct usb_usbvision *usbvision, int format) |
| { |
| static const char proc[] = "usbvision_set_video_format"; |
| int rc; |
| unsigned char value[2]; |
| |
| if (!USBVISION_IS_OPERATIONAL(usbvision)) |
| return 0; |
| |
| PDEBUG(DBG_FUNC, "isocMode %#02x", format); |
| |
| if ((format != ISOC_MODE_YUV422) |
| && (format != ISOC_MODE_YUV420) |
| && (format != ISOC_MODE_COMPRESS)) { |
| printk(KERN_ERR "usbvision: unknown video format %02x, using default YUV420", |
| format); |
| format = ISOC_MODE_YUV420; |
| } |
| value[0] = 0x0A; //TODO: See the effect of the filter |
| value[1] = format; // Sets the VO_MODE register which follows FILT_CONT |
| rc = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1), |
| USBVISION_OP_CODE, |
| USB_DIR_OUT | USB_TYPE_VENDOR | |
| USB_RECIP_ENDPOINT, 0, |
| (__u16) USBVISION_FILT_CONT, value, 2, HZ); |
| |
| if (rc < 0) { |
| printk(KERN_ERR "%s: ERROR=%d. USBVISION stopped - " |
| "reconnect or reload driver.\n", proc, rc); |
| } |
| usbvision->isocMode = format; |
| return rc; |
| } |
| |
| /* |
| * usbvision_set_output() |
| * |
| */ |
| |
| int usbvision_set_output(struct usb_usbvision *usbvision, int width, |
| int height) |
| { |
| int errCode = 0; |
| int UsbWidth, UsbHeight; |
| unsigned int frameRate=0, frameDrop=0; |
| unsigned char value[4]; |
| |
| if (!USBVISION_IS_OPERATIONAL(usbvision)) { |
| return 0; |
| } |
| |
| if (width > MAX_USB_WIDTH) { |
| UsbWidth = width / 2; |
| usbvision->stretch_width = 2; |
| } |
| else { |
| UsbWidth = width; |
| usbvision->stretch_width = 1; |
| } |
| |
| if (height > MAX_USB_HEIGHT) { |
| UsbHeight = height / 2; |
| usbvision->stretch_height = 2; |
| } |
| else { |
| UsbHeight = height; |
| usbvision->stretch_height = 1; |
| } |
| |
| RESTRICT_TO_RANGE(UsbWidth, MIN_FRAME_WIDTH, MAX_USB_WIDTH); |
| UsbWidth &= ~(MIN_FRAME_WIDTH-1); |
| RESTRICT_TO_RANGE(UsbHeight, MIN_FRAME_HEIGHT, MAX_USB_HEIGHT); |
| UsbHeight &= ~(1); |
| |
| PDEBUG(DBG_FUNC, "usb %dx%d; screen %dx%d; stretch %dx%d", |
| UsbWidth, UsbHeight, width, height, |
| usbvision->stretch_width, usbvision->stretch_height); |
| |
| /* I'll not rewrite the same values */ |
| if ((UsbWidth != usbvision->curwidth) || (UsbHeight != usbvision->curheight)) { |
| value[0] = UsbWidth & 0xff; //LSB |
| value[1] = (UsbWidth >> 8) & 0x03; //MSB |
| value[2] = UsbHeight & 0xff; //LSB |
| value[3] = (UsbHeight >> 8) & 0x03; //MSB |
| |
| errCode = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1), |
| USBVISION_OP_CODE, |
| USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT, |
| 0, (__u16) USBVISION_LXSIZE_O, value, 4, HZ); |
| |
| if (errCode < 0) { |
| err("%s failed: error %d", __func__, errCode); |
| return errCode; |
| } |
| usbvision->curwidth = usbvision->stretch_width * UsbWidth; |
| usbvision->curheight = usbvision->stretch_height * UsbHeight; |
| } |
| |
| if (usbvision->isocMode == ISOC_MODE_YUV422) { |
| frameRate = (usbvision->isocPacketSize * 1000) / (UsbWidth * UsbHeight * 2); |
| } |
| else if (usbvision->isocMode == ISOC_MODE_YUV420) { |
| frameRate = (usbvision->isocPacketSize * 1000) / ((UsbWidth * UsbHeight * 12) / 8); |
| } |
| else { |
| frameRate = FRAMERATE_MAX; |
| } |
| |
| if (usbvision->tvnormId & V4L2_STD_625_50) { |
| frameDrop = frameRate * 32 / 25 - 1; |
| } |
| else if (usbvision->tvnormId & V4L2_STD_525_60) { |
| frameDrop = frameRate * 32 / 30 - 1; |
| } |
| |
| RESTRICT_TO_RANGE(frameDrop, FRAMERATE_MIN, FRAMERATE_MAX); |
| |
| PDEBUG(DBG_FUNC, "frameRate %d fps, frameDrop %d", frameRate, frameDrop); |
| |
| frameDrop = FRAMERATE_MAX; // We can allow the maximum here, because dropping is controlled |
| |
| /* frameDrop = 7; => framePhase = 1, 5, 9, 13, 17, 21, 25, 0, 4, 8, ... |
| => frameSkip = 4; |
| => frameRate = (7 + 1) * 25 / 32 = 200 / 32 = 6.25; |
| |
| frameDrop = 9; => framePhase = 1, 5, 8, 11, 14, 17, 21, 24, 27, 1, 4, 8, ... |
| => frameSkip = 4, 3, 3, 3, 3, 4, 3, 3, 3, 3, 4, ... |
| => frameRate = (9 + 1) * 25 / 32 = 250 / 32 = 7.8125; |
| */ |
| errCode = usbvision_write_reg(usbvision, USBVISION_FRM_RATE, frameDrop); |
| return errCode; |
| } |
| |
| |
| /* |
| * usbvision_frames_alloc |
| * allocate the required frames |
| */ |
| int usbvision_frames_alloc(struct usb_usbvision *usbvision, int number_of_frames) |
| { |
| int i; |
| |
| /*needs to be page aligned cause the buffers can be mapped individually! */ |
| usbvision->max_frame_size = PAGE_ALIGN(usbvision->curwidth * |
| usbvision->curheight * |
| usbvision->palette.bytes_per_pixel); |
| |
| /* Try to do my best to allocate the frames the user want in the remaining memory */ |
| usbvision->num_frames = number_of_frames; |
| while (usbvision->num_frames > 0) { |
| usbvision->fbuf_size = usbvision->num_frames * usbvision->max_frame_size; |
| if((usbvision->fbuf = usbvision_rvmalloc(usbvision->fbuf_size))) { |
| break; |
| } |
| usbvision->num_frames--; |
| } |
| |
| spin_lock_init(&usbvision->queue_lock); |
| init_waitqueue_head(&usbvision->wait_frame); |
| init_waitqueue_head(&usbvision->wait_stream); |
| |
| /* Allocate all buffers */ |
| for (i = 0; i < usbvision->num_frames; i++) { |
| usbvision->frame[i].index = i; |
| usbvision->frame[i].grabstate = FrameState_Unused; |
| usbvision->frame[i].data = usbvision->fbuf + |
| i * usbvision->max_frame_size; |
| /* |
| * Set default sizes for read operation. |
| */ |
| usbvision->stretch_width = 1; |
| usbvision->stretch_height = 1; |
| usbvision->frame[i].width = usbvision->curwidth; |
| usbvision->frame[i].height = usbvision->curheight; |
| usbvision->frame[i].bytes_read = 0; |
| } |
| PDEBUG(DBG_FUNC, "allocated %d frames (%d bytes per frame)",usbvision->num_frames,usbvision->max_frame_size); |
| return usbvision->num_frames; |
| } |
| |
| /* |
| * usbvision_frames_free |
| * frees memory allocated for the frames |
| */ |
| void usbvision_frames_free(struct usb_usbvision *usbvision) |
| { |
| /* Have to free all that memory */ |
| PDEBUG(DBG_FUNC, "free %d frames",usbvision->num_frames); |
| |
| if (usbvision->fbuf != NULL) { |
| usbvision_rvfree(usbvision->fbuf, usbvision->fbuf_size); |
| usbvision->fbuf = NULL; |
| |
| usbvision->num_frames = 0; |
| } |
| } |
| /* |
| * usbvision_empty_framequeues() |
| * prepare queues for incoming and outgoing frames |
| */ |
| void usbvision_empty_framequeues(struct usb_usbvision *usbvision) |
| { |
| u32 i; |
| |
| INIT_LIST_HEAD(&(usbvision->inqueue)); |
| INIT_LIST_HEAD(&(usbvision->outqueue)); |
| |
| for (i = 0; i < USBVISION_NUMFRAMES; i++) { |
| usbvision->frame[i].grabstate = FrameState_Unused; |
| usbvision->frame[i].bytes_read = 0; |
| } |
| } |
| |
| /* |
| * usbvision_stream_interrupt() |
| * stops streaming |
| */ |
| int usbvision_stream_interrupt(struct usb_usbvision *usbvision) |
| { |
| int ret = 0; |
| |
| /* stop reading from the device */ |
| |
| usbvision->streaming = Stream_Interrupt; |
| ret = wait_event_timeout(usbvision->wait_stream, |
| (usbvision->streaming == Stream_Idle), |
| msecs_to_jiffies(USBVISION_NUMSBUF*USBVISION_URB_FRAMES)); |
| return ret; |
| } |
| |
| /* |
| * usbvision_set_compress_params() |
| * |
| */ |
| |
| static int usbvision_set_compress_params(struct usb_usbvision *usbvision) |
| { |
| static const char proc[] = "usbvision_set_compresion_params: "; |
| int rc; |
| unsigned char value[6]; |
| |
| value[0] = 0x0F; // Intra-Compression cycle |
| value[1] = 0x01; // Reg.45 one line per strip |
| value[2] = 0x00; // Reg.46 Force intra mode on all new frames |
| value[3] = 0x00; // Reg.47 FORCE_UP <- 0 normal operation (not force) |
| value[4] = 0xA2; // Reg.48 BUF_THR I'm not sure if this does something in not compressed mode. |
| value[5] = 0x00; // Reg.49 DVI_YUV This has nothing to do with compression |
| |
| //catched values for NT1004 |
| // value[0] = 0xFF; // Never apply intra mode automatically |
| // value[1] = 0xF1; // Use full frame height for virtual strip width; One line per strip |
| // value[2] = 0x01; // Force intra mode on all new frames |
| // value[3] = 0x00; // Strip size 400 Bytes; do not force up |
| // value[4] = 0xA2; // |
| if (!USBVISION_IS_OPERATIONAL(usbvision)) |
| return 0; |
| |
| rc = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1), |
| USBVISION_OP_CODE, |
| USB_DIR_OUT | USB_TYPE_VENDOR | |
| USB_RECIP_ENDPOINT, 0, |
| (__u16) USBVISION_INTRA_CYC, value, 5, HZ); |
| |
| if (rc < 0) { |
| printk(KERN_ERR "%sERROR=%d. USBVISION stopped - " |
| "reconnect or reload driver.\n", proc, rc); |
| return rc; |
| } |
| |
| if (usbvision->bridgeType == BRIDGE_NT1004) { |
| value[0] = 20; // PCM Threshold 1 |
| value[1] = 12; // PCM Threshold 2 |
| value[2] = 255; // Distorsion Threshold inter |
| value[3] = 255; // Distorsion Threshold intra |
| value[4] = 43; // Max Distorsion inter |
| value[5] = 43; // Max Distorsion intra |
| } |
| else { |
| value[0] = 20; // PCM Threshold 1 |
| value[1] = 12; // PCM Threshold 2 |
| value[2] = 255; // Distorsion Threshold d7-d0 |
| value[3] = 0; // Distorsion Threshold d11-d8 |
| value[4] = 43; // Max Distorsion d7-d0 |
| value[5] = 0; // Max Distorsion d8 |
| } |
| |
| if (!USBVISION_IS_OPERATIONAL(usbvision)) |
| return 0; |
| |
| rc = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1), |
| USBVISION_OP_CODE, |
| USB_DIR_OUT | USB_TYPE_VENDOR | |
| USB_RECIP_ENDPOINT, 0, |
| (__u16) USBVISION_PCM_THR1, value, 6, HZ); |
| |
| if (rc < 0) { |
| printk(KERN_ERR "%sERROR=%d. USBVISION stopped - " |
| "reconnect or reload driver.\n", proc, rc); |
| return rc; |
| } |
| |
| |
| return rc; |
| } |
| |
| |
| /* |
| * usbvision_set_input() |
| * |
| * Set the input (saa711x, ...) size x y and other misc input params |
| * I've no idea if this parameters are right |
| * |
| */ |
| int usbvision_set_input(struct usb_usbvision *usbvision) |
| { |
| static const char proc[] = "usbvision_set_input: "; |
| int rc; |
| unsigned char value[8]; |
| unsigned char dvi_yuv_value; |
| |
| if (!USBVISION_IS_OPERATIONAL(usbvision)) |
| return 0; |
| |
| /* Set input format expected from decoder*/ |
| if (usbvision_device_data[usbvision->DevModel].Vin_Reg1_override) { |
| value[0] = usbvision_device_data[usbvision->DevModel].Vin_Reg1; |
| } else if(usbvision_device_data[usbvision->DevModel].Codec == CODEC_SAA7113) { |
| /* SAA7113 uses 8 bit output */ |
| value[0] = USBVISION_8_422_SYNC; |
| } else { |
| /* I'm sure only about d2-d0 [010] 16 bit 4:2:2 usin sync pulses |
| * as that is how saa7111 is configured */ |
| value[0] = USBVISION_16_422_SYNC; |
| /* | USBVISION_VSNC_POL | USBVISION_VCLK_POL);*/ |
| } |
| |
| rc = usbvision_write_reg(usbvision, USBVISION_VIN_REG1, value[0]); |
| if (rc < 0) { |
| printk(KERN_ERR "%sERROR=%d. USBVISION stopped - " |
| "reconnect or reload driver.\n", proc, rc); |
| return rc; |
| } |
| |
| |
| if (usbvision->tvnormId & V4L2_STD_PAL) { |
| value[0] = 0xC0; |
| value[1] = 0x02; //0x02C0 -> 704 Input video line length |
| value[2] = 0x20; |
| value[3] = 0x01; //0x0120 -> 288 Input video n. of lines |
| value[4] = 0x60; |
| value[5] = 0x00; //0x0060 -> 96 Input video h offset |
| value[6] = 0x16; |
| value[7] = 0x00; //0x0016 -> 22 Input video v offset |
| } else if (usbvision->tvnormId & V4L2_STD_SECAM) { |
| value[0] = 0xC0; |
| value[1] = 0x02; //0x02C0 -> 704 Input video line length |
| value[2] = 0x20; |
| value[3] = 0x01; //0x0120 -> 288 Input video n. of lines |
| value[4] = 0x01; |
| value[5] = 0x00; //0x0001 -> 01 Input video h offset |
| value[6] = 0x01; |
| value[7] = 0x00; //0x0001 -> 01 Input video v offset |
| } else { /* V4L2_STD_NTSC */ |
| value[0] = 0xD0; |
| value[1] = 0x02; //0x02D0 -> 720 Input video line length |
| value[2] = 0xF0; |
| value[3] = 0x00; //0x00F0 -> 240 Input video number of lines |
| value[4] = 0x50; |
| value[5] = 0x00; //0x0050 -> 80 Input video h offset |
| value[6] = 0x10; |
| value[7] = 0x00; //0x0010 -> 16 Input video v offset |
| } |
| |
| if (usbvision_device_data[usbvision->DevModel].X_Offset >= 0) { |
| value[4]=usbvision_device_data[usbvision->DevModel].X_Offset & 0xff; |
| value[5]=(usbvision_device_data[usbvision->DevModel].X_Offset & 0x0300) >> 8; |
| } |
| |
| if (adjust_X_Offset != -1) { |
| value[4] = adjust_X_Offset & 0xff; |
| value[5] = (adjust_X_Offset & 0x0300) >> 8; |
| } |
| |
| if (usbvision_device_data[usbvision->DevModel].Y_Offset >= 0) { |
| value[6]=usbvision_device_data[usbvision->DevModel].Y_Offset & 0xff; |
| value[7]=(usbvision_device_data[usbvision->DevModel].Y_Offset & 0x0300) >> 8; |
| } |
| |
| if (adjust_Y_Offset != -1) { |
| value[6] = adjust_Y_Offset & 0xff; |
| value[7] = (adjust_Y_Offset & 0x0300) >> 8; |
| } |
| |
| rc = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1), |
| USBVISION_OP_CODE, /* USBVISION specific code */ |
| USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT, 0, |
| (__u16) USBVISION_LXSIZE_I, value, 8, HZ); |
| if (rc < 0) { |
| printk(KERN_ERR "%sERROR=%d. USBVISION stopped - " |
| "reconnect or reload driver.\n", proc, rc); |
| return rc; |
| } |
| |
| |
| dvi_yuv_value = 0x00; /* U comes after V, Ya comes after U/V, Yb comes after Yb */ |
| |
| if(usbvision_device_data[usbvision->DevModel].Dvi_yuv_override){ |
| dvi_yuv_value = usbvision_device_data[usbvision->DevModel].Dvi_yuv; |
| } |
| else if(usbvision_device_data[usbvision->DevModel].Codec == CODEC_SAA7113) { |
| /* This changes as the fine sync control changes. Further investigation necessary */ |
| dvi_yuv_value = 0x06; |
| } |
| |
| return (usbvision_write_reg(usbvision, USBVISION_DVI_YUV, dvi_yuv_value)); |
| } |
| |
| |
| /* |
| * usbvision_set_dram_settings() |
| * |
| * Set the buffer address needed by the usbvision dram to operate |
| * This values has been taken with usbsnoop. |
| * |
| */ |
| |
| static int usbvision_set_dram_settings(struct usb_usbvision *usbvision) |
| { |
| int rc; |
| unsigned char value[8]; |
| |
| if (usbvision->isocMode == ISOC_MODE_COMPRESS) { |
| value[0] = 0x42; |
| value[1] = 0x71; |
| value[2] = 0xff; |
| value[3] = 0x00; |
| value[4] = 0x98; |
| value[5] = 0xe0; |
| value[6] = 0x71; |
| value[7] = 0xff; |
| // UR: 0x0E200-0x3FFFF = 204288 Words (1 Word = 2 Byte) |
| // FDL: 0x00000-0x0E099 = 57498 Words |
| // VDW: 0x0E3FF-0x3FFFF |
| } |
| else { |
| value[0] = 0x42; |
| value[1] = 0x00; |
| value[2] = 0xff; |
| value[3] = 0x00; |
| value[4] = 0x00; |
| value[5] = 0x00; |
| value[6] = 0x00; |
| value[7] = 0xff; |
| } |
| /* These are the values of the address of the video buffer, |
| * they have to be loaded into the USBVISION_DRM_PRM1-8 |
| * |
| * Start address of video output buffer for read: drm_prm1-2 -> 0x00000 |
| * End address of video output buffer for read: drm_prm1-3 -> 0x1ffff |
| * Start address of video frame delay buffer: drm_prm1-4 -> 0x20000 |
| * Only used in compressed mode |
| * End address of video frame delay buffer: drm_prm1-5-6 -> 0x3ffff |
| * Only used in compressed mode |
| * Start address of video output buffer for write: drm_prm1-7 -> 0x00000 |
| * End address of video output buffer for write: drm_prm1-8 -> 0x1ffff |
| */ |
| |
| if (!USBVISION_IS_OPERATIONAL(usbvision)) |
| return 0; |
| |
| rc = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1), |
| USBVISION_OP_CODE, /* USBVISION specific code */ |
| USB_DIR_OUT | USB_TYPE_VENDOR | |
| USB_RECIP_ENDPOINT, 0, |
| (__u16) USBVISION_DRM_PRM1, value, 8, HZ); |
| |
| if (rc < 0) { |
| err("%sERROR=%d", __func__, rc); |
| return rc; |
| } |
| |
| /* Restart the video buffer logic */ |
| if ((rc = usbvision_write_reg(usbvision, USBVISION_DRM_CONT, USBVISION_RES_UR | |
| USBVISION_RES_FDL | USBVISION_RES_VDW)) < 0) |
| return rc; |
| rc = usbvision_write_reg(usbvision, USBVISION_DRM_CONT, 0x00); |
| |
| return rc; |
| } |
| |
| /* |
| * () |
| * |
| * Power on the device, enables suspend-resume logic |
| * & reset the isoc End-Point |
| * |
| */ |
| |
| int usbvision_power_on(struct usb_usbvision *usbvision) |
| { |
| int errCode = 0; |
| |
| PDEBUG(DBG_FUNC, ""); |
| |
| usbvision_write_reg(usbvision, USBVISION_PWR_REG, USBVISION_SSPND_EN); |
| usbvision_write_reg(usbvision, USBVISION_PWR_REG, |
| USBVISION_SSPND_EN | USBVISION_RES2); |
| |
| usbvision_write_reg(usbvision, USBVISION_PWR_REG, |
| USBVISION_SSPND_EN | USBVISION_PWR_VID); |
| errCode = usbvision_write_reg(usbvision, USBVISION_PWR_REG, |
| USBVISION_SSPND_EN | USBVISION_PWR_VID | USBVISION_RES2); |
| if (errCode == 1) { |
| usbvision->power = 1; |
| } |
| PDEBUG(DBG_FUNC, "%s: errCode %d", (errCode<0)?"ERROR":"power is on", errCode); |
| return errCode; |
| } |
| |
| |
| /* |
| * usbvision timer stuff |
| */ |
| |
| // to call usbvision_power_off from task queue |
| static void call_usbvision_power_off(struct work_struct *work) |
| { |
| struct usb_usbvision *usbvision = container_of(work, struct usb_usbvision, powerOffWork); |
| |
| PDEBUG(DBG_FUNC, ""); |
| if(mutex_lock_interruptible(&usbvision->lock)) { |
| return; |
| } |
| |
| |
| if(usbvision->user == 0) { |
| usbvision_i2c_unregister(usbvision); |
| |
| usbvision_power_off(usbvision); |
| usbvision->initialized = 0; |
| } |
| mutex_unlock(&usbvision->lock); |
| } |
| |
| static void usbvision_powerOffTimer(unsigned long data) |
| { |
| struct usb_usbvision *usbvision = (void *) data; |
| |
| PDEBUG(DBG_FUNC, ""); |
| del_timer(&usbvision->powerOffTimer); |
| INIT_WORK(&usbvision->powerOffWork, call_usbvision_power_off); |
| (void) schedule_work(&usbvision->powerOffWork); |
| |
| } |
| |
| void usbvision_init_powerOffTimer(struct usb_usbvision *usbvision) |
| { |
| init_timer(&usbvision->powerOffTimer); |
| usbvision->powerOffTimer.data = (long) usbvision; |
| usbvision->powerOffTimer.function = usbvision_powerOffTimer; |
| } |
| |
| void usbvision_set_powerOffTimer(struct usb_usbvision *usbvision) |
| { |
| mod_timer(&usbvision->powerOffTimer, jiffies + USBVISION_POWEROFF_TIME); |
| } |
| |
| void usbvision_reset_powerOffTimer(struct usb_usbvision *usbvision) |
| { |
| if (timer_pending(&usbvision->powerOffTimer)) { |
| del_timer(&usbvision->powerOffTimer); |
| } |
| } |
| |
| /* |
| * usbvision_begin_streaming() |
| * Sure you have to put bit 7 to 0, if not incoming frames are droped, but no |
| * idea about the rest |
| */ |
| int usbvision_begin_streaming(struct usb_usbvision *usbvision) |
| { |
| int errCode = 0; |
| |
| if (usbvision->isocMode == ISOC_MODE_COMPRESS) { |
| usbvision_init_compression(usbvision); |
| } |
| errCode = usbvision_write_reg(usbvision, USBVISION_VIN_REG2, USBVISION_NOHVALID | |
| usbvision->Vin_Reg2_Preset); |
| return errCode; |
| } |
| |
| /* |
| * usbvision_restart_isoc() |
| * Not sure yet if touching here PWR_REG make loose the config |
| */ |
| |
| int usbvision_restart_isoc(struct usb_usbvision *usbvision) |
| { |
| int ret; |
| |
| if ( |
| (ret = |
| usbvision_write_reg(usbvision, USBVISION_PWR_REG, |
| USBVISION_SSPND_EN | USBVISION_PWR_VID)) < 0) |
| return ret; |
| if ( |
| (ret = |
| usbvision_write_reg(usbvision, USBVISION_PWR_REG, |
| USBVISION_SSPND_EN | USBVISION_PWR_VID | |
| USBVISION_RES2)) < 0) |
| return ret; |
| if ( |
| (ret = |
| usbvision_write_reg(usbvision, USBVISION_VIN_REG2, |
| USBVISION_KEEP_BLANK | USBVISION_NOHVALID | |
| usbvision->Vin_Reg2_Preset)) < 0) return ret; |
| |
| /* TODO: schedule timeout */ |
| while ((usbvision_read_reg(usbvision, USBVISION_STATUS_REG) & 0x01) != 1); |
| |
| return 0; |
| } |
| |
| int usbvision_audio_off(struct usb_usbvision *usbvision) |
| { |
| if (usbvision_write_reg(usbvision, USBVISION_IOPIN_REG, USBVISION_AUDIO_MUTE) < 0) { |
| printk(KERN_ERR "usbvision_audio_off: can't wirte reg\n"); |
| return -1; |
| } |
| usbvision->AudioMute = 0; |
| usbvision->AudioChannel = USBVISION_AUDIO_MUTE; |
| return 0; |
| } |
| |
| int usbvision_set_audio(struct usb_usbvision *usbvision, int AudioChannel) |
| { |
| if (!usbvision->AudioMute) { |
| if (usbvision_write_reg(usbvision, USBVISION_IOPIN_REG, AudioChannel) < 0) { |
| printk(KERN_ERR "usbvision_set_audio: can't write iopin register for audio switching\n"); |
| return -1; |
| } |
| } |
| usbvision->AudioChannel = AudioChannel; |
| return 0; |
| } |
| |
| int usbvision_setup(struct usb_usbvision *usbvision,int format) |
| { |
| usbvision_set_video_format(usbvision, format); |
| usbvision_set_dram_settings(usbvision); |
| usbvision_set_compress_params(usbvision); |
| usbvision_set_input(usbvision); |
| usbvision_set_output(usbvision, MAX_USB_WIDTH, MAX_USB_HEIGHT); |
| usbvision_restart_isoc(usbvision); |
| |
| /* cosas del PCM */ |
| return USBVISION_IS_OPERATIONAL(usbvision); |
| } |
| |
| int usbvision_set_alternate(struct usb_usbvision *dev) |
| { |
| int errCode, prev_alt = dev->ifaceAlt; |
| int i; |
| |
| dev->ifaceAlt=0; |
| for(i=0;i< dev->num_alt; i++) |
| if(dev->alt_max_pkt_size[i]>dev->alt_max_pkt_size[dev->ifaceAlt]) |
| dev->ifaceAlt=i; |
| |
| if (dev->ifaceAlt != prev_alt) { |
| dev->isocPacketSize = dev->alt_max_pkt_size[dev->ifaceAlt]; |
| PDEBUG(DBG_FUNC,"setting alternate %d with wMaxPacketSize=%u", dev->ifaceAlt,dev->isocPacketSize); |
| errCode = usb_set_interface(dev->dev, dev->iface, dev->ifaceAlt); |
| if (errCode < 0) { |
| err ("cannot change alternate number to %d (error=%i)", |
| dev->ifaceAlt, errCode); |
| return errCode; |
| } |
| } |
| |
| PDEBUG(DBG_ISOC, "ISO Packet Length:%d", dev->isocPacketSize); |
| |
| return 0; |
| } |
| |
| /* |
| * usbvision_init_isoc() |
| * |
| */ |
| int usbvision_init_isoc(struct usb_usbvision *usbvision) |
| { |
| struct usb_device *dev = usbvision->dev; |
| int bufIdx, errCode, regValue; |
| int sb_size; |
| |
| if (!USBVISION_IS_OPERATIONAL(usbvision)) |
| return -EFAULT; |
| |
| usbvision->curFrame = NULL; |
| scratch_reset(usbvision); |
| |
| /* Alternate interface 1 is is the biggest frame size */ |
| errCode = usbvision_set_alternate(usbvision); |
| if (errCode < 0) { |
| usbvision->last_error = errCode; |
| return -EBUSY; |
| } |
| sb_size = USBVISION_URB_FRAMES * usbvision->isocPacketSize; |
| |
| regValue = (16 - usbvision_read_reg(usbvision, |
| USBVISION_ALTER_REG)) & 0x0F; |
| |
| usbvision->usb_bandwidth = regValue >> 1; |
| PDEBUG(DBG_ISOC, "USB Bandwidth Usage: %dMbit/Sec", |
| usbvision->usb_bandwidth); |
| |
| |
| |
| /* We double buffer the Iso lists */ |
| |
| for (bufIdx = 0; bufIdx < USBVISION_NUMSBUF; bufIdx++) { |
| int j, k; |
| struct urb *urb; |
| |
| urb = usb_alloc_urb(USBVISION_URB_FRAMES, GFP_KERNEL); |
| if (urb == NULL) { |
| err("%s: usb_alloc_urb() failed", __func__); |
| return -ENOMEM; |
| } |
| usbvision->sbuf[bufIdx].urb = urb; |
| usbvision->sbuf[bufIdx].data = |
| usb_buffer_alloc(usbvision->dev, |
| sb_size, |
| GFP_KERNEL, |
| &urb->transfer_dma); |
| urb->dev = dev; |
| urb->context = usbvision; |
| urb->pipe = usb_rcvisocpipe(dev, usbvision->video_endp); |
| urb->transfer_flags = URB_ISO_ASAP; |
| urb->interval = 1; |
| urb->transfer_buffer = usbvision->sbuf[bufIdx].data; |
| urb->complete = usbvision_isocIrq; |
| urb->number_of_packets = USBVISION_URB_FRAMES; |
| urb->transfer_buffer_length = |
| usbvision->isocPacketSize * USBVISION_URB_FRAMES; |
| for (j = k = 0; j < USBVISION_URB_FRAMES; j++, |
| k += usbvision->isocPacketSize) { |
| urb->iso_frame_desc[j].offset = k; |
| urb->iso_frame_desc[j].length = |
| usbvision->isocPacketSize; |
| } |
| } |
| |
| |
| /* Submit all URBs */ |
| for (bufIdx = 0; bufIdx < USBVISION_NUMSBUF; bufIdx++) { |
| errCode = usb_submit_urb(usbvision->sbuf[bufIdx].urb, |
| GFP_KERNEL); |
| if (errCode) { |
| err("%s: usb_submit_urb(%d) failed: error %d", |
| __func__, bufIdx, errCode); |
| } |
| } |
| |
| usbvision->streaming = Stream_Idle; |
| PDEBUG(DBG_ISOC, "%s: streaming=1 usbvision->video_endp=$%02x", |
| __func__, |
| usbvision->video_endp); |
| return 0; |
| } |
| |
| /* |
| * usbvision_stop_isoc() |
| * |
| * This procedure stops streaming and deallocates URBs. Then it |
| * activates zero-bandwidth alt. setting of the video interface. |
| * |
| */ |
| void usbvision_stop_isoc(struct usb_usbvision *usbvision) |
| { |
| int bufIdx, errCode, regValue; |
| int sb_size = USBVISION_URB_FRAMES * usbvision->isocPacketSize; |
| |
| if ((usbvision->streaming == Stream_Off) || (usbvision->dev == NULL)) |
| return; |
| |
| /* Unschedule all of the iso td's */ |
| for (bufIdx = 0; bufIdx < USBVISION_NUMSBUF; bufIdx++) { |
| usb_kill_urb(usbvision->sbuf[bufIdx].urb); |
| if (usbvision->sbuf[bufIdx].data){ |
| usb_buffer_free(usbvision->dev, |
| sb_size, |
| usbvision->sbuf[bufIdx].data, |
| usbvision->sbuf[bufIdx].urb->transfer_dma); |
| } |
| usb_free_urb(usbvision->sbuf[bufIdx].urb); |
| usbvision->sbuf[bufIdx].urb = NULL; |
| } |
| |
| |
| PDEBUG(DBG_ISOC, "%s: streaming=Stream_Off\n", __func__); |
| usbvision->streaming = Stream_Off; |
| |
| if (!usbvision->remove_pending) { |
| |
| /* Set packet size to 0 */ |
| usbvision->ifaceAlt=0; |
| errCode = usb_set_interface(usbvision->dev, usbvision->iface, |
| usbvision->ifaceAlt); |
| if (errCode < 0) { |
| err("%s: usb_set_interface() failed: error %d", |
| __func__, errCode); |
| usbvision->last_error = errCode; |
| } |
| regValue = (16-usbvision_read_reg(usbvision, USBVISION_ALTER_REG)) & 0x0F; |
| usbvision->isocPacketSize = |
| (regValue == 0) ? 0 : (regValue * 64) - 1; |
| PDEBUG(DBG_ISOC, "ISO Packet Length:%d", |
| usbvision->isocPacketSize); |
| |
| usbvision->usb_bandwidth = regValue >> 1; |
| PDEBUG(DBG_ISOC, "USB Bandwidth Usage: %dMbit/Sec", |
| usbvision->usb_bandwidth); |
| } |
| } |
| |
| int usbvision_muxsel(struct usb_usbvision *usbvision, int channel) |
| { |
| /* inputs #0 and #3 are constant for every SAA711x. */ |
| /* inputs #1 and #2 are variable for SAA7111 and SAA7113 */ |
| int mode[4]= {SAA7115_COMPOSITE0, 0, 0, SAA7115_COMPOSITE3}; |
| int audio[]= {1, 0, 0, 0}; |
| struct v4l2_routing route; |
| //channel 0 is TV with audiochannel 1 (tuner mono) |
| //channel 1 is Composite with audio channel 0 (line in) |
| //channel 2 is S-Video with audio channel 0 (line in) |
| //channel 3 is additional video inputs to the device with audio channel 0 (line in) |
| |
| RESTRICT_TO_RANGE(channel, 0, usbvision->video_inputs); |
| usbvision->ctl_input = channel; |
| |
| // set the new channel |
| // Regular USB TV Tuners -> channel: 0 = Television, 1 = Composite, 2 = S-Video |
| // Four video input devices -> channel: 0 = Chan White, 1 = Chan Green, 2 = Chan Yellow, 3 = Chan Red |
| |
| switch (usbvision_device_data[usbvision->DevModel].Codec) { |
| case CODEC_SAA7113: |
| mode[1] = SAA7115_COMPOSITE2; |
| if (SwitchSVideoInput) { |
| /* To handle problems with S-Video Input for |
| * some devices. Use SwitchSVideoInput |
| * parameter when loading the module.*/ |
| mode[2] = SAA7115_COMPOSITE1; |
| } |
| else { |
| mode[2] = SAA7115_SVIDEO1; |
| } |
| break; |
| case CODEC_SAA7111: |
| default: |
| /* modes for saa7111 */ |
| mode[1] = SAA7115_COMPOSITE1; |
| mode[2] = SAA7115_SVIDEO1; |
| break; |
| } |
| route.input = mode[channel]; |
| route.output = 0; |
| call_i2c_clients(usbvision, VIDIOC_INT_S_VIDEO_ROUTING,&route); |
| usbvision_set_audio(usbvision, audio[channel]); |
| return 0; |
| } |
| |
| /* |
| * Overrides for Emacs so that we follow Linus's tabbing style. |
| * --------------------------------------------------------------------------- |
| * Local variables: |
| * c-basic-offset: 8 |
| * End: |
| */ |