drivers/media/usb/pwc/pwc-kiara.c

Source file repositories/reference/linux-study-clean/drivers/media/usb/pwc/pwc-kiara.c

File Facts

System
Linux kernel
Corpus path
drivers/media/usb/pwc/pwc-kiara.c
Extension
.c
Size
34712 bytes
Lines
881
Domain
Driver Families
Bucket
drivers/media
Inferred role
Driver Families: implementation source
Status
source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

// SPDX-License-Identifier: GPL-2.0-or-later
/* Linux driver for Philips webcam
   (C) 2004-2006 Luc Saillard (luc@saillard.org)

   NOTE: this version of pwc is an unofficial (modified) release of pwc & pcwx
   driver and thus may have bugs that are not present in the original version.
   Please send bug reports and support requests to <luc@saillard.org>.
   The decompression routines have been implemented by reverse-engineering the
   Nemosoft binary pwcx module. Caveat emptor.

*/


/* This tables contains entries for the 730/740/750 (Kiara) camera, with
   4 different qualities (no compression, low, medium, high).
   It lists the bandwidth requirements for said mode by its alternate interface
   number. An alternate of 0 means that the mode is unavailable.

   There are 6 * 4 * 4 entries:
     6 different resolutions subqcif, qsif, qcif, sif, cif, vga
     6 framerates: 5, 10, 15, 20, 25, 30
     4 compression modi: none, low, medium, high

   When an uncompressed mode is not available, the next available compressed mode
   will be chosen (unless the decompressor is absent). Sometimes there are only
   1 or 2 compressed modes available; in that case entries are duplicated.
*/


#include "pwc-kiara.h"

const unsigned int Kiara_fps_vector[PWC_FPS_MAX_KIARA] = { 5, 10, 15, 20, 25, 30 };

const struct Kiara_table_entry Kiara_table[PSZ_MAX][6][4] =
{
   /* SQCIF */
   {
      /* 5 fps */
      {
	 {0, },
	 {0, },
	 {0, },
	 {0, },
      },
      /* 10 fps */
      {
	 {0, },
	 {0, },
	 {0, },
	 {0, },
      },
      /* 15 fps */
      {
	 {0, },
	 {0, },
	 {0, },
	 {0, },
      },
      /* 20 fps */
      {
	 {0, },
	 {0, },
	 {0, },
	 {0, },
      },
      /* 25 fps */
      {
	 {0, },
	 {0, },
	 {0, },
	 {0, },
      },
      /* 30 fps */
      {
	 {0, },
	 {0, },
	 {0, },
	 {0, },
      },
   },
   /* QSIF */
   {
      /* 5 fps */
      {
	 {1, 146,    0, {0x1D, 0xF4, 0x30, 0x00, 0x00, 0x00, 0x00, 0x18, 0x00, 0x92, 0x00, 0x80}},
	 {1, 146,    0, {0x1D, 0xF4, 0x30, 0x00, 0x00, 0x00, 0x00, 0x18, 0x00, 0x92, 0x00, 0x80}},
	 {1, 146,    0, {0x1D, 0xF4, 0x30, 0x00, 0x00, 0x00, 0x00, 0x18, 0x00, 0x92, 0x00, 0x80}},
	 {1, 146,    0, {0x1D, 0xF4, 0x30, 0x00, 0x00, 0x00, 0x00, 0x18, 0x00, 0x92, 0x00, 0x80}},
      },
      /* 10 fps */

Annotation

Implementation Notes