/* * usbvision-core.c - driver for NT100x USB video capture devices * * * Copyright (c) 1999-2005 Joerg Heckenbach * Dwaine Garden * * 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 #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "usbvision.h" static unsigned int core_debug; module_param(core_debug, int, 0644); MODULE_PARM_DESC(core_debug, "enable debug messages [core]"); static int adjust_compression = 1; /* Set the compression to be adaptive */ module_param(adjust_compression, int, 0444); MODULE_PARM_DESC(adjust_compression, " 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 switch_svideo_input; module_param(switch_svideo_input, int, 0444); MODULE_PARM_DESC(switch_svideo_input, " 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)) \ printk(KERN_INFO KBUILD_MODNAME ":[%s:%d] " fmt, \ __func__, __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(KERN_CONT "%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 err_code = 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->header_length == USBVISION_HEADER_LENGTH)) { err_code = USBVISION_HEADER_LENGTH; header->frame_width = header->frame_width_lo + (header->frame_width_hi << 8); header->frame_height = header->frame_height_lo + (header->frame_height_hi << 8); break; } } return err_code; } /* 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 = isoc_state_no_frame; } int usbvision_scratch_alloc(struct usb_usbvision *usbvision) { usbvision->scratch = vmalloc_32(scratch_buf_size); scratch_reset(usbvision); if (usbvision->scratch == NULL) { dev_err(&usbvision->dev->dev, "%s: unable to allocate %d bytes for scratch\n", __func__, scratch_buf_size); return -ENOMEM; } return 0; } void usbvision_scratch_free(struct usb_usbvision *usbvision) { vfree(usbvision->scratch); usbvision->scratch = NULL; } /* * 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->intra_frame_buffer = vmalloc_32(IFB_size); if (usbvision->intra_frame_buffer == NULL) { dev_err(&usbvision->dev->dev, "%s: unable to allocate %d for compr. frame buffer\n", __func__, IFB_size); return -ENOMEM; } return 0; } /* * usbvision_decompress_free() * * frees intermediate buffer for decompression */ void usbvision_decompress_free(struct usb_usbvision *usbvision) { vfree(usbvision->intra_frame_buffer); usbvision->intra_frame_buffer = 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 parse_state usbvision_find_header(struct usb_usbvision *usbvision) { struct usbvision_frame *frame; int found_header = 0; frame = usbvision->cur_frame; while (scratch_get_header(usbvision, &frame->isoc_header) == 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->isoc_header.magic_2, frame->isoc_header.magic_1, frame->isoc_header.header_length, frame->isoc_header.frame_num, frame->isoc_header.frame_phase, frame->isoc_header.frame_latency, frame->isoc_header.data_format, frame->isoc_header.format_param, frame->isoc_header.frame_width, frame->isoc_header.frame_height); if (usbvision->request_intra) { if (frame->isoc_header.format_param & 0x80) { found_header = 1; usbvision->last_isoc_frame_num = -1; /* do not check for lost frames this time */ usbvision_unrequest_intra(usbvision); break; } } else { found_header = 1; break; } } if (found_header) { frame->frmwidth = frame->isoc_header.frame_width * usbvision->stretch_width; frame->frmheight = frame->isoc_header.frame_height * 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 parse_state_end_parse; } /* found header */ if (frame->isoc_header.data_format == ISOC_MODE_COMPRESS) { /* check isoc_header.frame_num for lost frames */ if (usbvision->last_isoc_frame_num >= 0) { if (((usbvision->last_isoc_frame_num + 1) % 32) != frame->isoc_header.frame_num) { /* unexpected frame drop: need to request new intra frame */ PDEBUG(DBG_HEADER, "Lost frame before %d on USB", frame->isoc_header.frame_num); usbvision_request_intra(usbvision); return parse_state_next_frame; } } usbvision->last_isoc_frame_num = frame->isoc_header.frame_num; } usbvision->header_count++; frame->scanstate = scan_state_lines; frame->curline = 0; return parse_state_continue; } static enum parse_state 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->cur_frame; f = frame->data + (frame->v4l2_linesize * frame->curline); /* Make sure there's enough data for the entire line */ len = (frame->isoc_header.frame_width * 2) + 5; if (scratch_len(usbvision) < len) { PDEBUG(DBG_PARSE, "out of data in line %d, need %u.\n", frame->curline, len); return parse_state_out; } if ((frame->curline + 1) >= frame->frmheight) return parse_state_next_frame; 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 parse_state_next_frame; return parse_state_continue; } /* The decompression routine */ static int usbvision_decompress(struct usb_usbvision *usbvision, unsigned char *compressed, unsigned char *decompressed, int *start_pos, int *block_typestart_pos, int len) { int rest_pixel, idx, max_pos, pos, extra_pos, block_len, block_type_pos, block_type_len; unsigned char block_byte, block_code, block_type, block_type_byte, integrator; integrator = 0; pos = *start_pos; block_type_pos = *block_typestart_pos; max_pos = 396; /* pos + len; */ extra_pos = pos; block_len = 0; block_byte = 0; block_code = 0; block_type = 0; block_type_byte = 0; block_type_len = 0; rest_pixel = len; for (idx = 0; idx < len; idx++) { if (block_len == 0) { if (block_type_len == 0) { block_type_byte = compressed[block_type_pos]; block_type_pos++; block_type_len = 4; } block_type = (block_type_byte & 0xC0) >> 6; /* statistic: */ usbvision->compr_block_types[block_type]++; pos = extra_pos; if (block_type == 0) { if (rest_pixel >= 24) { idx += 23; rest_pixel -= 24; integrator = decompressed[idx]; } else { idx += rest_pixel - 1; rest_pixel = 0; } } else { block_code = compressed[pos]; pos++; if (rest_pixel >= 24) block_len = 24; else block_len = rest_pixel; rest_pixel -= block_len; extra_pos = pos + (block_len / 4); } block_type_byte <<= 2; block_type_len -= 1; } if (block_len > 0) { if ((block_len % 4) == 0) { block_byte = compressed[pos]; pos++; } if (block_type == 1) /* inter Block */ integrator = decompressed[idx]; switch (block_byte & 0xC0) { case 0x03 << 6: integrator += compressed[extra_pos]; extra_pos++; break; case 0x02 << 6: integrator += block_code; break; case 0x00: integrator -= block_code; break; } decompressed[idx] = integrator; block_byte <<= 2; block_len -= 1; } } *start_pos = extra_pos; *block_typestart_pos = block_type_pos; 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 parse_state 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 strip_data[USBVISION_STRIP_LEN_MAX]; unsigned char strip_header[USBVISION_STRIP_HEADER_LEN]; int idx, idx_end, strip_len, strip_ptr, startblock_pos, block_pos, block_type_pos; int clipmask_index, bytes_per_pixel, rc; int image_size; unsigned char rv, gv, bv; static unsigned char *Y, *U, *V; frame = usbvision->cur_frame; image_size = 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 + image_size + (frame->frmwidth >> 1) * frame->curline; v = u + (image_size >> 1); } else if (frame->v4l2_format.format == V4L2_PIX_FMT_YVU420) { v = frame->data + image_size + ((frame->curline * (frame->width)) >> 2); u = v + (image_size >> 2); } if (frame->curline == 0) usbvision_adjust_compression(usbvision); if (scratch_len(usbvision) < USBVISION_STRIP_HEADER_LEN) return parse_state_out; /* get strip header without changing the scratch_read_ptr */ scratch_set_extra_ptr(usbvision, &strip_ptr, 0); scratch_get_extra(usbvision, &strip_header[0], &strip_ptr, USBVISION_STRIP_HEADER_LEN); if (strip_header[0] != USBVISION_STRIP_MAGIC) { /* wrong strip magic */ usbvision->strip_magic_errors++; return parse_state_next_frame; } if (frame->curline != (int)strip_header[2]) { /* line number mismatch error */ usbvision->strip_line_number_errors++; } strip_len = 2 * (unsigned int)strip_header[1]; if (strip_len > USBVISION_STRIP_LEN_MAX) { /* strip overrun */ /* I think this never happens */ usbvision_request_intra(usbvision); } if (scratch_len(usbvision) < strip_len) { /* there is not enough data for the strip */ return parse_state_out; } if (usbvision->intra_frame_buffer) { Y = usbvision->intra_frame_buffer + frame->frmwidth * frame->curline; U = usbvision->intra_frame_buffer + image_size + (frame->frmwidth / 2) * (frame->curline / 2); V = usbvision->intra_frame_buffer + image_size / 4 * 5 + (frame->frmwidth / 2) * (frame->curline / 2); } else { return parse_state_next_frame; } bytes_per_pixel = frame->v4l2_format.bytes_per_pixel; clipmask_index = frame->curline * MAX_FRAME_WIDTH; scratch_get(usbvision, strip_data, strip_len); idx_end = frame->frmwidth; block_type_pos = USBVISION_STRIP_HEADER_LEN; startblock_pos = block_type_pos + (idx_end - 1) / 96 + (idx_end / 2 - 1) / 96 + 2; block_pos = startblock_pos; usbvision->block_pos = block_pos; rc = usbvision_decompress(usbvision, strip_data, Y, &block_pos, &block_type_pos, idx_end); if (strip_len > usbvision->max_strip_len) usbvision->max_strip_len = strip_len; if (frame->curline % 2) rc = usbvision_decompress(usbvision, strip_data, V, &block_pos, &block_type_pos, idx_end / 2); else rc = usbvision_decompress(usbvision, strip_data, U, &block_pos, &block_type_pos, idx_end / 2); if (block_pos > usbvision->comprblock_pos) usbvision->comprblock_pos = block_pos; if (block_pos > strip_len) usbvision->strip_len_errors++; for (idx = 0; idx < idx_end; 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 parse_state_next_frame; return parse_state_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 parse_state 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->cur_frame; 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->isoc_header.frame_width; if (scratch_len(usbvision) < (int)pixel_per_line * 3) { /* printk(KERN_DEBUG "out of data, need %d\n", len); */ return parse_state_out; } if ((frame->curline + 1) >= frame->frmheight) return parse_state_next_frame; 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 parse_state_next_frame; return parse_state_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 parse_state newstate; long copylen = 0; unsigned long lock_flags; frame = usbvision->cur_frame; PDEBUG(DBG_PARSE, "parsing len=%d\n", scratch_len(usbvision)); while (1) { newstate = parse_state_out; if (scratch_len(usbvision)) { if (frame->scanstate == scan_state_scanning) { newstate = usbvision_find_header(usbvision); } else if (frame->scanstate == scan_state_lines) { if (usbvision->isoc_mode == ISOC_MODE_YUV420) newstate = usbvision_parse_lines_420(usbvision, ©len); else if (usbvision->isoc_mode == ISOC_MODE_YUV422) newstate = usbvision_parse_lines_422(usbvision, ©len); else if (usbvision->isoc_mode == ISOC_MODE_COMPRESS) newstate = usbvision_parse_compress(usbvision, ©len); } } if (newstate == parse_state_continue) continue; if ((newstate == parse_state_next_frame) || (newstate == parse_state_out)) break; return; /* parse_state_end_parse */ } if (newstate == parse_state_next_frame) { frame->grabstate = frame_state_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->cur_frame = 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 = frame_state_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->isoc_err_count++; continue; } /* Detect and ignore empty packets */ if (packet_len < 0) { PDEBUG(DBG_ISOC, "error packet [%d]", i); usbvision->isoc_skip_count++; continue; } else if (packet_len == 0) { /* Frame end ????? */ PDEBUG(DBG_ISOC, "null packet [%d]", i); usbvision->isocstate = isoc_state_no_frame; usbvision->isoc_skip_count++; continue; } else if (packet_len > usbvision->isoc_packet_size) { PDEBUG(DBG_ISOC, "packet[%d] > isoc_packet_size", i); usbvision->isoc_skip_count++; continue; } PDEBUG(DBG_ISOC, "packet ok [%d] len=%d", i, packet_len); if (usbvision->isocstate == isoc_state_no_frame) { /* new frame begins */ usbvision->isocstate = isoc_state_in_frame; 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->isoc_data_count += packet_len; usbvision->isoc_packet_count++; } #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_isoc_irq(struct urb *urb) { int err_code = 0; int len; struct usb_usbvision *usbvision = urb->context; int i; unsigned long start_time = 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->cur_frame; /* Manage streaming interruption */ if (usbvision->streaming == stream_interrupt) { usbvision->streaming = stream_idle; if ((*f)) { (*f)->grabstate = frame_state_ready; (*f)->scanstate = scan_state_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->isoc_urb_count++; 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->time_in_irq += jiffies - start_time; 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; err_code = usb_submit_urb(urb, GFP_ATOMIC); if (err_code) { dev_err(&usbvision->dev->dev, "%s: usb_submit_urb failed: error %d\n", __func__, err_code); } 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 err_code = 0; unsigned char buffer[1]; if (!USBVISION_IS_OPERATIONAL(usbvision)) return -1; err_code = 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 (err_code < 0) { dev_err(&usbvision->dev->dev, "%s: failed: error %d\n", __func__, err_code); return err_code; } 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 err_code = 0; if (!USBVISION_IS_OPERATIONAL(usbvision)) return 0; err_code = 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 (err_code < 0) { dev_err(&usbvision->dev->dev, "%s: failed: error %d\n", __func__, err_code); } return err_code; } static void usbvision_ctrl_urb_complete(struct urb *urb) { struct usb_usbvision *usbvision = (struct usb_usbvision *)urb->context; PDEBUG(DBG_IRQ, ""); usbvision->ctrl_urb_busy = 0; if (waitqueue_active(&usbvision->ctrl_urb_wq)) wake_up_interruptible(&usbvision->ctrl_urb_wq); } static int usbvision_write_reg_irq(struct usb_usbvision *usbvision, int address, unsigned char *data, int len) { int err_code = 0; PDEBUG(DBG_IRQ, ""); if (len > 8) return -EFAULT; if (usbvision->ctrl_urb_busy) return -EBUSY; usbvision->ctrl_urb_busy = 1; usbvision->ctrl_urb_setup.bRequestType = USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT; usbvision->ctrl_urb_setup.bRequest = USBVISION_OP_CODE; usbvision->ctrl_urb_setup.wValue = 0; usbvision->ctrl_urb_setup.wIndex = cpu_to_le16(address); usbvision->ctrl_urb_setup.wLength = cpu_to_le16(len); usb_fill_control_urb(usbvision->ctrl_urb, usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1), (unsigned char *)&usbvision->ctrl_urb_setup, (void *)usbvision->ctrl_urb_buffer, len, usbvision_ctrl_urb_complete, (void *)usbvision); memcpy(usbvision->ctrl_urb_buffer, data, len); err_code = usb_submit_urb(usbvision->ctrl_urb, GFP_ATOMIC); if (err_code < 0) { /* error in usb_submit_urb() */ usbvision->ctrl_urb_busy = 0; } PDEBUG(DBG_IRQ, "submit %d byte: error %d", len, err_code); return err_code; } static int usbvision_init_compression(struct usb_usbvision *usbvision) { int err_code = 0; usbvision->last_isoc_frame_num = -1; usbvision->isoc_data_count = 0; usbvision->isoc_packet_count = 0; usbvision->isoc_skip_count = 0; usbvision->compr_level = 50; usbvision->last_compr_level = -1; usbvision->isoc_urb_count = 0; usbvision->request_intra = 1; usbvision->isoc_measure_bandwidth_count = 0; return err_code; } /* this function measures the used bandwidth since last call * return: 0 : no error * sets used_bandwidth to 1-100 : 1-100% of full bandwidth resp. to isoc_packet_size */ static int usbvision_measure_bandwidth(struct usb_usbvision *usbvision) { int err_code = 0; if (usbvision->isoc_measure_bandwidth_count < 2) { /* this gives an average bandwidth of 3 frames */ usbvision->isoc_measure_bandwidth_count++; return err_code; } if ((usbvision->isoc_packet_size > 0) && (usbvision->isoc_packet_count > 0)) { usbvision->used_bandwidth = usbvision->isoc_data_count / (usbvision->isoc_packet_count + usbvision->isoc_skip_count) * 100 / usbvision->isoc_packet_size; } usbvision->isoc_measure_bandwidth_count = 0; usbvision->isoc_data_count = 0; usbvision->isoc_packet_count = 0; usbvision->isoc_skip_count = 0; return err_code; } static int usbvision_adjust_compression(struct usb_usbvision *usbvision) { int err_code = 0; unsigned char buffer[6]; PDEBUG(DBG_IRQ, ""); if ((adjust_compression) && (usbvision->used_bandwidth > 0)) { usbvision->compr_level += (usbvision->used_bandwidth - 90) / 2; RESTRICT_TO_RANGE(usbvision->compr_level, 0, 100); if (usbvision->compr_level != usbvision->last_compr_level) { int distortion; if (usbvision->bridge_type == BRIDGE_NT1004 || usbvision->bridge_type == BRIDGE_NT1005) { buffer[0] = (unsigned char)(4 + 16 * usbvision->compr_level / 100); /* PCM Threshold 1 */ buffer[1] = (unsigned char)(4 + 8 * usbvision->compr_level / 100); /* PCM Threshold 2 */ distortion = 7 + 248 * usbvision->compr_level / 100; buffer[2] = (unsigned char)(distortion & 0xFF); /* Average distortion Threshold (inter) */ buffer[3] = (unsigned char)(distortion & 0xFF); /* Average distortion Threshold (intra) */ distortion = 1 + 42 * usbvision->compr_level / 100; buffer[4] = (unsigned char)(distortion & 0xFF); /* Maximum distortion Threshold (inter) */ buffer[5] = (unsigned char)(distortion & 0xFF); /* Maximum distortion Threshold (intra) */ } else { /* BRIDGE_NT1003 */ buffer[0] = (unsigned char)(4 + 16 * usbvision->compr_level / 100); /* PCM threshold 1 */ buffer[1] = (unsigned char)(4 + 8 * usbvision->compr_level / 100); /* PCM threshold 2 */ distortion = 2 + 253 * usbvision->compr_level / 100; buffer[2] = (unsigned char)(distortion & 0xFF); /* distortion threshold bit0-7 */ buffer[3] = 0; /* (unsigned char)((distortion >> 8) & 0x0F); distortion threshold bit 8-11 */ distortion = 0 + 43 * usbvision->compr_level / 100; buffer[4] = (unsigned char)(distortion & 0xFF); /* maximum distortion bit0-7 */ buffer[5] = 0; /* (unsigned char)((distortion >> 8) & 0x01); maximum distortion bit 8 */ } err_code = usbvision_write_reg_irq(usbvision, USBVISION_PCM_THR1, buffer, 6); if (err_code == 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->last_compr_level = usbvision->compr_level; } } } return err_code; } static int usbvision_request_intra(struct usb_usbvision *usbvision) { int err_code = 0; unsigned char buffer[1]; PDEBUG(DBG_IRQ, ""); usbvision->request_intra = 1; buffer[0] = 1; usbvision_write_reg_irq(usbvision, USBVISION_FORCE_INTRA, buffer, 1); return err_code; } static int usbvision_unrequest_intra(struct usb_usbvision *usbvision) { int err_code = 0; unsigned char buffer[1]; PDEBUG(DBG_IRQ, ""); usbvision->request_intra = 0; buffer[0] = 0; usbvision_write_reg_irq(usbvision, USBVISION_FORCE_INTRA, buffer, 1); return err_code; } /******************************* * usbvision utility functions *******************************/ int usbvision_power_off(struct usb_usbvision *usbvision) { int err_code = 0; PDEBUG(DBG_FUNC, ""); err_code = usbvision_write_reg(usbvision, USBVISION_PWR_REG, USBVISION_SSPND_EN); if (err_code == 1) usbvision->power = 0; PDEBUG(DBG_FUNC, "%s: err_code %d", (err_code != 1) ? "ERROR" : "power is off", err_code); return err_code; } /* configure webcam image sensor using the serial port */ static int usbvision_init_webcam(struct usb_usbvision *usbvision) { int rc; int i; static char init_values[38][3] = { { 0x04, 0x12, 0x08 }, { 0x05, 0xff, 0xc8 }, { 0x06, 0x18, 0x07 }, { 0x07, 0x90, 0x00 }, { 0x09, 0x00, 0x00 }, { 0x0a, 0x00, 0x00 }, { 0x0b, 0x08, 0x00 }, { 0x0d, 0xcc, 0xcc }, { 0x0e, 0x13, 0x14 }, { 0x10, 0x9b, 0x83 }, { 0x11, 0x5a, 0x3f }, { 0x12, 0xe4, 0x73 }, { 0x13, 0x88, 0x84 }, { 0x14, 0x89, 0x80 }, { 0x15, 0x00, 0x20 }, { 0x16, 0x00, 0x00 }, { 0x17, 0xff, 0xa0 }, { 0x18, 0x6b, 0x20 }, { 0x19, 0x22, 0x40 }, { 0x1a, 0x10, 0x07 }, { 0x1b, 0x00, 0x47 }, { 0x1c, 0x03, 0xe0 }, { 0x1d, 0x00, 0x00 }, { 0x1e, 0x00, 0x00 }, { 0x1f, 0x00, 0x00 }, { 0x20, 0x00, 0x00 }, { 0x21, 0x00, 0x00 }, { 0x22, 0x00, 0x00 }, { 0x23, 0x00, 0x00 }, { 0x24, 0x00, 0x00 }, { 0x25, 0x00, 0x00 }, { 0x26, 0x00, 0x00 }, { 0x27, 0x00, 0x00 }, { 0x28, 0x00, 0x00 }, { 0x29, 0x00, 0x00 }, { 0x08, 0x80, 0x60 }, { 0x0f, 0x2d, 0x24 }, { 0x0c, 0x80, 0x80 } }; char value[3]; /* the only difference between PAL and NTSC init_values */ if (usbvision_device_data[usbvision->dev_model].video_norm == V4L2_STD_NTSC) init_values[4][1] = 0x34; for (i = 0; i < sizeof(init_values) / 3; i++) { usbvision_write_reg(usbvision, USBVISION_SER_MODE, USBVISION_SER_MODE_SOFT); memcpy(value, init_values[i], 3); 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_SER_DAT1, value, 3, HZ); if (rc < 0) return rc; usbvision_write_reg(usbvision, USBVISION_SER_MODE, USBVISION_SER_MODE_SIO); /* write 3 bytes to the serial port using SIO mode */ usbvision_write_reg(usbvision, USBVISION_SER_CONT, 3 | 0x10); usbvision_write_reg(usbvision, USBVISION_IOPIN_REG, 0); usbvision_write_reg(usbvision, USBVISION_SER_MODE, USBVISION_SER_MODE_SOFT); usbvision_write_reg(usbvision, USBVISION_IOPIN_REG, USBVISION_IO_2); usbvision_write_reg(usbvision, USBVISION_SER_MODE, USBVISION_SER_MODE_SOFT | USBVISION_CLK_OUT); usbvision_write_reg(usbvision, USBVISION_SER_MODE, USBVISION_SER_MODE_SOFT | USBVISION_DAT_IO); usbvision_write_reg(usbvision, USBVISION_SER_MODE, USBVISION_SER_MODE_SOFT | USBVISION_CLK_OUT | USBVISION_DAT_IO); } return 0; } /* * 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, "isoc_mode %#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->isoc_mode = format; return rc; } /* * usbvision_set_output() * */ int usbvision_set_output(struct usb_usbvision *usbvision, int width, int height) { int err_code = 0; int usb_width, usb_height; unsigned int frame_rate = 0, frame_drop = 0; unsigned char value[4]; if (!USBVISION_IS_OPERATIONAL(usbvision)) return 0; if (width > MAX_USB_WIDTH) { usb_width = width / 2; usbvision->stretch_width = 2; } else { usb_width = width; usbvision->stretch_width = 1; } if (height > MAX_USB_HEIGHT) { usb_height = height / 2; usbvision->stretch_height = 2; } else { usb_height = height; usbvision->stretch_height = 1; } RESTRICT_TO_RANGE(usb_width, MIN_FRAME_WIDTH, MAX_USB_WIDTH); usb_width &= ~(MIN_FRAME_WIDTH-1); RESTRICT_TO_RANGE(usb_height, MIN_FRAME_HEIGHT, MAX_USB_HEIGHT); usb_height &= ~(1); PDEBUG(DBG_FUNC, "usb %dx%d; screen %dx%d; stretch %dx%d", usb_width, usb_height, width, height, usbvision->stretch_width, usbvision->stretch_height); /* I'll not rewrite the same values */ if ((usb_width != usbvision->curwidth) || (usb_height != usbvision->curheight)) { value[0] = usb_width & 0xff; /* LSB */ value[1] = (usb_width >> 8) & 0x03; /* MSB */ value[2] = usb_height & 0xff; /* LSB */ value[3] = (usb_height >> 8) & 0x03; /* MSB */ err_code = 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 (err_code < 0) { dev_err(&usbvision->dev->dev, "%s failed: error %d\n", __func__, err_code); return err_code; } usbvision->curwidth = usbvision->stretch_width * usb_width; usbvision->curheight = usbvision->stretch_height * usb_height; } if (usbvision->isoc_mode == ISOC_MODE_YUV422) frame_rate = (usbvision->isoc_packet_size * 1000) / (usb_width * usb_height * 2); else if (usbvision->isoc_mode == ISOC_MODE_YUV420) frame_rate = (usbvision->isoc_packet_size * 1000) / ((usb_width * usb_height * 12) / 8); else frame_rate = FRAMERATE_MAX; if (usbvision->tvnorm_id & V4L2_STD_625_50) frame_drop = frame_rate * 32 / 25 - 1; else if (usbvision->tvnorm_id & V4L2_STD_525_60) frame_drop = frame_rate * 32 / 30 - 1; RESTRICT_TO_RANGE(frame_drop, FRAMERATE_MIN, FRAMERATE_MAX); PDEBUG(DBG_FUNC, "frame_rate %d fps, frame_drop %d", frame_rate, frame_drop); frame_drop = FRAMERATE_MAX; /* We can allow the maximum here, because dropping is controlled */ if (usbvision_device_data[usbvision->dev_model].codec == CODEC_WEBCAM) { if (usbvision_device_data[usbvision->dev_model].video_norm == V4L2_STD_PAL) frame_drop = 25; else frame_drop = 30; } /* frame_drop = 7; => frame_phase = 1, 5, 9, 13, 17, 21, 25, 0, 4, 8, ... => frame_skip = 4; => frame_rate = (7 + 1) * 25 / 32 = 200 / 32 = 6.25; frame_drop = 9; => frame_phase = 1, 5, 8, 11, 14, 17, 21, 24, 27, 1, 4, 8, ... => frame_skip = 4, 3, 3, 3, 3, 4, 3, 3, 3, 3, 4, ... => frame_rate = (9 + 1) * 25 / 32 = 250 / 32 = 7.8125; */ err_code = usbvision_write_reg(usbvision, USBVISION_FRM_RATE, frame_drop); return err_code; } /* * 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; usbvision->fbuf = usbvision_rvmalloc(usbvision->fbuf_size); if (usbvision->fbuf) 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 = frame_state_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 = frame_state_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->bridge_type == BRIDGE_NT1004) { value[0] = 20; /* PCM Threshold 1 */ value[1] = 12; /* PCM Threshold 2 */ value[2] = 255; /* Distortion Threshold inter */ value[3] = 255; /* Distortion Threshold intra */ value[4] = 43; /* Max Distortion inter */ value[5] = 43; /* Max Distortion intra */ } else { value[0] = 20; /* PCM Threshold 1 */ value[1] = 12; /* PCM Threshold 2 */ value[2] = 255; /* Distortion Threshold d7-d0 */ value[3] = 0; /* Distortion Threshold d11-d8 */ value[4] = 43; /* Max Distortion d7-d0 */ value[5] = 0; /* Max Distortion 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; } /* * 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->dev_model].vin_reg1_override) { value[0] = usbvision_device_data[usbvision->dev_model].vin_reg1; } else if (usbvision_device_data[usbvision->dev_model].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->tvnorm_id & 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->tvnorm_id & 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 */ } /* webcam is only 480 pixels wide, both PAL and NTSC version */ if (usbvision_device_data[usbvision->dev_model].codec == CODEC_WEBCAM) { value[0] = 0xe0; value[1] = 0x01; /* 0x01E0 -> 480 Input video line length */ } if (usbvision_device_data[usbvision->dev_model].x_offset >= 0) { value[4] = usbvision_device_data[usbvision->dev_model].x_offset & 0xff; value[5] = (usbvision_device_data[usbvision->dev_model].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->dev_model].y_offset >= 0) { value[6] = usbvision_device_data[usbvision->dev_model].y_offset & 0xff; value[7] = (usbvision_device_data[usbvision->dev_model].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->dev_model].dvi_yuv_override) { dvi_yuv_value = usbvision_device_data[usbvision->dev_model].dvi_yuv; } else if (usbvision_device_data[usbvision->dev_model].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->isoc_mode == 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) { dev_err(&usbvision->dev->dev, "%s: ERROR=%d\n", __func__, rc); return rc; } /* Restart the video buffer logic */ rc = usbvision_write_reg(usbvision, USBVISION_DRM_CONT, USBVISION_RES_UR | USBVISION_RES_FDL | USBVISION_RES_VDW); if (rc < 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 err_code = 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); if (usbvision_device_data[usbvision->dev_model].codec == CODEC_WEBCAM) { usbvision_write_reg(usbvision, USBVISION_VIN_REG1, USBVISION_16_422_SYNC | USBVISION_HVALID_PO); usbvision_write_reg(usbvision, USBVISION_VIN_REG2, USBVISION_NOHVALID | USBVISION_KEEP_BLANK); } usbvision_write_reg(usbvision, USBVISION_PWR_REG, USBVISION_SSPND_EN | USBVISION_PWR_VID); mdelay(10); err_code = usbvision_write_reg(usbvision, USBVISION_PWR_REG, USBVISION_SSPND_EN | USBVISION_PWR_VID | USBVISION_RES2); if (err_code == 1) usbvision->power = 1; PDEBUG(DBG_FUNC, "%s: err_code %d", (err_code < 0) ? "ERROR" : "power is on", err_code); return err_code; } /* * 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, power_off_work); PDEBUG(DBG_FUNC, ""); if (mutex_lock_interruptible(&usbvision->v4l2_lock)) return; if (usbvision->user == 0) { usbvision_i2c_unregister(usbvision); usbvision_power_off(usbvision); usbvision->initialized = 0; } mutex_unlock(&usbvision->v4l2_lock); } static void usbvision_power_off_timer(unsigned long data) { struct usb_usbvision *usbvision = (void *)data; PDEBUG(DBG_FUNC, ""); del_timer(&usbvision->power_off_timer); INIT_WORK(&usbvision->power_off_work, call_usbvision_power_off); (void) schedule_work(&usbvision->power_off_work); } void usbvision_init_power_off_timer(struct usb_usbvision *usbvision) { init_timer(&usbvision->power_off_timer); usbvision->power_off_timer.data = (long)usbvision; usbvision->power_off_timer.function = usbvision_power_off_timer; } void usbvision_set_power_off_timer(struct usb_usbvision *usbvision) { mod_timer(&usbvision->power_off_timer, jiffies + USBVISION_POWEROFF_TIME); } void usbvision_reset_power_off_timer(struct usb_usbvision *usbvision) { if (timer_pending(&usbvision->power_off_timer)) del_timer(&usbvision->power_off_timer); } /* * 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) { if (usbvision->isoc_mode == ISOC_MODE_COMPRESS) usbvision_init_compression(usbvision); return usbvision_write_reg(usbvision, USBVISION_VIN_REG2, USBVISION_NOHVALID | usbvision->vin_reg2_preset); } /* * 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; ret = usbvision_write_reg(usbvision, USBVISION_PWR_REG, USBVISION_SSPND_EN | USBVISION_PWR_VID); if (ret < 0) return ret; ret = usbvision_write_reg(usbvision, USBVISION_PWR_REG, USBVISION_SSPND_EN | USBVISION_PWR_VID | USBVISION_RES2); if (ret < 0) return ret; ret = usbvision_write_reg(usbvision, USBVISION_VIN_REG2, USBVISION_KEEP_BLANK | USBVISION_NOHVALID | usbvision->vin_reg2_preset); if (ret < 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 write reg\n"); return -1; } usbvision->audio_mute = 0; usbvision->audio_channel = USBVISION_AUDIO_MUTE; return 0; } int usbvision_set_audio(struct usb_usbvision *usbvision, int audio_channel) { if (!usbvision->audio_mute) { if (usbvision_write_reg(usbvision, USBVISION_IOPIN_REG, audio_channel) < 0) { printk(KERN_ERR "usbvision_set_audio: can't write iopin register for audio switching\n"); return -1; } } usbvision->audio_channel = audio_channel; return 0; } int usbvision_setup(struct usb_usbvision *usbvision, int format) { if (usbvision_device_data[usbvision->dev_model].codec == CODEC_WEBCAM) usbvision_init_webcam(usbvision); 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 err_code, prev_alt = dev->iface_alt; int i; dev->iface_alt = 0; for (i = 0; i < dev->num_alt; i++) if (dev->alt_max_pkt_size[i] > dev->alt_max_pkt_size[dev->iface_alt]) dev->iface_alt = i; if (dev->iface_alt != prev_alt) { dev->isoc_packet_size = dev->alt_max_pkt_size[dev->iface_alt]; PDEBUG(DBG_FUNC, "setting alternate %d with max_packet_size=%u", dev->iface_alt, dev->isoc_packet_size); err_code = usb_set_interface(dev->dev, dev->iface, dev->iface_alt); if (err_code < 0) { dev_err(&dev->dev->dev, "cannot change alternate number to %d (error=%i)\n", dev->iface_alt, err_code); return err_code; } } PDEBUG(DBG_ISOC, "ISO Packet Length:%d", dev->isoc_packet_size); return 0; } /* * usbvision_init_isoc() * */ int usbvision_init_isoc(struct usb_usbvision *usbvision) { struct usb_device *dev = usbvision->dev; int buf_idx, err_code, reg_value; int sb_size; if (!USBVISION_IS_OPERATIONAL(usbvision)) return -EFAULT; usbvision->cur_frame = NULL; scratch_reset(usbvision); /* Alternate interface 1 is is the biggest frame size */ err_code = usbvision_set_alternate(usbvision); if (err_code < 0) { usbvision->last_error = err_code; return -EBUSY; } sb_size = USBVISION_URB_FRAMES * usbvision->isoc_packet_size; reg_value = (16 - usbvision_read_reg(usbvision, USBVISION_ALTER_REG)) & 0x0F; usbvision->usb_bandwidth = reg_value >> 1; PDEBUG(DBG_ISOC, "USB Bandwidth Usage: %dMbit/Sec", usbvision->usb_bandwidth); /* We double buffer the Iso lists */ for (buf_idx = 0; buf_idx < USBVISION_NUMSBUF; buf_idx++) { int j, k; struct urb *urb; urb = usb_alloc_urb(USBVISION_URB_FRAMES, GFP_KERNEL); if (urb == NULL) { dev_err(&usbvision->dev->dev, "%s: usb_alloc_urb() failed\n", __func__); return -ENOMEM; } usbvision->sbuf[buf_idx].urb = urb; usbvision->sbuf[buf_idx].data = usb_alloc_coherent(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_NO_TRANSFER_DMA_MAP; urb->interval = 1; urb->transfer_buffer = usbvision->sbuf[buf_idx].data; urb->complete = usbvision_isoc_irq; urb->number_of_packets = USBVISION_URB_FRAMES; urb->transfer_buffer_length = usbvision->isoc_packet_size * USBVISION_URB_FRAMES; for (j = k = 0; j < USBVISION_URB_FRAMES; j++, k += usbvision->isoc_packet_size) { urb->iso_frame_desc[j].offset = k; urb->iso_frame_desc[j].length = usbvision->isoc_packet_size; } } /* Submit all URBs */ for (buf_idx = 0; buf_idx < USBVISION_NUMSBUF; buf_idx++) { err_code = usb_submit_urb(usbvision->sbuf[buf_idx].urb, GFP_KERNEL); if (err_code) { dev_err(&usbvision->dev->dev, "%s: usb_submit_urb(%d) failed: error %d\n", __func__, buf_idx, err_code); } } 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 buf_idx, err_code, reg_value; int sb_size = USBVISION_URB_FRAMES * usbvision->isoc_packet_size; if ((usbvision->streaming == stream_off) || (usbvision->dev == NULL)) return; /* Unschedule all of the iso td's */ for (buf_idx = 0; buf_idx < USBVISION_NUMSBUF; buf_idx++) { usb_kill_urb(usbvision->sbuf[buf_idx].urb); if (usbvision->sbuf[buf_idx].data) { usb_free_coherent(usbvision->dev, sb_size, usbvision->sbuf[buf_idx].data, usbvision->sbuf[buf_idx].urb->transfer_dma); } usb_free_urb(usbvision->sbuf[buf_idx].urb); usbvision->sbuf[buf_idx].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->iface_alt = 0; err_code = usb_set_interface(usbvision->dev, usbvision->iface, usbvision->iface_alt); if (err_code < 0) { dev_err(&usbvision->dev->dev, "%s: usb_set_interface() failed: error %d\n", __func__, err_code); usbvision->last_error = err_code; } reg_value = (16-usbvision_read_reg(usbvision, USBVISION_ALTER_REG)) & 0x0F; usbvision->isoc_packet_size = (reg_value == 0) ? 0 : (reg_value * 64) - 1; PDEBUG(DBG_ISOC, "ISO Packet Length:%d", usbvision->isoc_packet_size); usbvision->usb_bandwidth = reg_value >> 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 }; /* 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->dev_model].codec) { case CODEC_SAA7113: mode[1] = SAA7115_COMPOSITE2; if (switch_svideo_input) { /* To handle problems with S-Video Input for * some devices. Use switch_svideo_input * 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; } call_all(usbvision, video, s_routing, mode[channel], 0, 0); 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: */