--- /dev/null
+/*
+ * 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/gfp.h>
+#include <linux/mm.h>
+#include <linux/highmem.h>
+#include <linux/vmalloc.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/spinlock.h>
+#include <linux/io.h>
+#include <linux/videodev2.h>
+#include <linux/i2c.h>
+
+#include <media/saa7115.h>
+#include <media/v4l2-common.h>
+#include <media/tuner.h>
+
+#include <linux/workqueue.h>
+
+#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, 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;
+ 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;
+ 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;
+ }
+
+ 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;
+
+ 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)
+ usbvision_decompress(usbvision, strip_data, V, &block_pos, &block_type_pos, idx_end / 2);
+ else
+ 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;
+ v4l2_get_timestamp(&(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)
+{
+ 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 0;
+}
+
+/* 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)
+{
+ if (usbvision->isoc_measure_bandwidth_count < 2) { /* this gives an average bandwidth of 3 frames */
+ usbvision->isoc_measure_bandwidth_count++;
+ return 0;
+ }
+ 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 0;
+}
+
+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)
+{
+ 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 0;
+}
+
+static int usbvision_unrequest_intra(struct usb_usbvision *usbvision)
+{
+ 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 0;
+}
+
+/*******************************
+ * 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)
+{
+ setup_timer(&usbvision->power_off_timer, usbvision_power_off_timer,
+ (unsigned long)usbvision);
+}
+
+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;
+}
Code Review / kvmfornfv.git / blobdiff