diff options
Diffstat (limited to 'drivers/staging/media/usbvision/usbvision-core.c')
| -rw-r--r-- | drivers/staging/media/usbvision/usbvision-core.c | 2428 |
1 files changed, 2428 insertions, 0 deletions
diff --git a/drivers/staging/media/usbvision/usbvision-core.c b/drivers/staging/media/usbvision/usbvision-core.c new file mode 100644 index 000000000000..f05a5c84dc18 --- /dev/null +++ b/drivers/staging/media/usbvision/usbvision-core.c @@ -0,0 +1,2428 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * 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 + */ + +#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/i2c/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) + +/* 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 split 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; + frame->ts = ktime_get_ns(); + 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; + 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); + } + + 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 = usbvision->ctrl_urb_buffer; + + 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; + + usbvision->ctrl_urb_buffer[0] = value; + 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, + usbvision->ctrl_urb_buffer, 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; +} + + +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 } + }; + unsigned char *value = usbvision->ctrl_urb_buffer; + + /* 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"; + unsigned char *value = usbvision->ctrl_urb_buffer; + int rc; + + 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 = usbvision->ctrl_urb_buffer; + + 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--; + } + + /* 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_compression_params: "; + int rc; + unsigned char *value = usbvision->ctrl_urb_buffer; + + 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 */ + + /* caught 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 = usbvision->ctrl_urb_buffer; + 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 using 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) +{ + unsigned char *value = usbvision->ctrl_urb_buffer; + int rc; + + 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_begin_streaming() + * Sure you have to put bit 7 to 0, if not incoming frames are dropped, 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) + 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); + if (!usbvision->sbuf[buf_idx].data) + return -ENOMEM; + + 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; +} |