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03f56d9952
The variable ret is being initialized with a value that is never read
and it is being updated later with a new value. The initialization is
redundant and can be removed.
Addresses-Coverity: ("Unused value")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Reviewed-by: Ezequiel Garcia <ezequiel@collabora.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
545 lines
14 KiB
C
545 lines
14 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/* Driver for Philips webcam
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Functions that send various control messages to the webcam, including
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video modes.
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(C) 1999-2003 Nemosoft Unv.
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(C) 2004-2006 Luc Saillard (luc@saillard.org)
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(C) 2011 Hans de Goede <hdegoede@redhat.com>
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NOTE: this version of pwc is an unofficial (modified) release of pwc & pcwx
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driver and thus may have bugs that are not present in the original version.
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Please send bug reports and support requests to <luc@saillard.org>.
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NOTE: this version of pwc is an unofficial (modified) release of pwc & pcwx
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driver and thus may have bugs that are not present in the original version.
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Please send bug reports and support requests to <luc@saillard.org>.
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The decompression routines have been implemented by reverse-engineering the
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Nemosoft binary pwcx module. Caveat emptor.
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*/
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/*
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Changes
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2001/08/03 Alvarado Added methods for changing white balance and
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red/green gains
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*/
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/* Control functions for the cam; brightness, contrast, video mode, etc. */
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#ifdef __KERNEL__
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#include <linux/uaccess.h>
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#endif
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#include <asm/errno.h>
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#include "pwc.h"
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#include "pwc-kiara.h"
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#include "pwc-timon.h"
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#include "pwc-dec1.h"
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#include "pwc-dec23.h"
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/* Selectors for status controls used only in this file */
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#define GET_STATUS_B00 0x0B00
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#define SENSOR_TYPE_FORMATTER1 0x0C00
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#define GET_STATUS_3000 0x3000
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#define READ_RAW_Y_MEAN_FORMATTER 0x3100
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#define SET_POWER_SAVE_MODE_FORMATTER 0x3200
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#define MIRROR_IMAGE_FORMATTER 0x3300
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#define LED_FORMATTER 0x3400
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#define LOWLIGHT 0x3500
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#define GET_STATUS_3600 0x3600
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#define SENSOR_TYPE_FORMATTER2 0x3700
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#define GET_STATUS_3800 0x3800
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#define GET_STATUS_4000 0x4000
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#define GET_STATUS_4100 0x4100 /* Get */
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#define CTL_STATUS_4200 0x4200 /* [GS] 1 */
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/* Formatters for the Video Endpoint controls [GS]ET_EP_STREAM_CTL */
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#define VIDEO_OUTPUT_CONTROL_FORMATTER 0x0100
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static const char *size2name[PSZ_MAX] =
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{
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"subQCIF",
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"QSIF",
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"QCIF",
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"SIF",
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"CIF",
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"VGA",
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};
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/********/
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/* Entries for the Nala (645/646) camera; the Nala doesn't have compression
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preferences, so you either get compressed or non-compressed streams.
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An alternate value of 0 means this mode is not available at all.
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*/
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#define PWC_FPS_MAX_NALA 8
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struct Nala_table_entry {
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char alternate; /* USB alternate setting */
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int compressed; /* Compressed yes/no */
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unsigned char mode[3]; /* precomputed mode table */
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};
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static unsigned int Nala_fps_vector[PWC_FPS_MAX_NALA] = { 4, 5, 7, 10, 12, 15, 20, 24 };
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static struct Nala_table_entry Nala_table[PSZ_MAX][PWC_FPS_MAX_NALA] =
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{
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#include "pwc-nala.h"
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};
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/****************************************************************************/
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static int recv_control_msg(struct pwc_device *pdev,
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u8 request, u16 value, int recv_count)
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{
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int rc;
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rc = usb_control_msg(pdev->udev, usb_rcvctrlpipe(pdev->udev, 0),
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request,
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USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
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value, pdev->vcinterface,
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pdev->ctrl_buf, recv_count, USB_CTRL_GET_TIMEOUT);
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if (rc < 0)
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PWC_ERROR("recv_control_msg error %d req %02x val %04x\n",
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rc, request, value);
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return rc;
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}
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static inline int send_video_command(struct pwc_device *pdev,
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int index, const unsigned char *buf, int buflen)
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{
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int rc;
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memcpy(pdev->ctrl_buf, buf, buflen);
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rc = usb_control_msg(pdev->udev, usb_sndctrlpipe(pdev->udev, 0),
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SET_EP_STREAM_CTL,
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USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
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VIDEO_OUTPUT_CONTROL_FORMATTER, index,
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pdev->ctrl_buf, buflen, USB_CTRL_SET_TIMEOUT);
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if (rc >= 0)
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memcpy(pdev->cmd_buf, buf, buflen);
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else
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PWC_ERROR("send_video_command error %d\n", rc);
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return rc;
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}
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int send_control_msg(struct pwc_device *pdev,
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u8 request, u16 value, void *buf, int buflen)
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{
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return usb_control_msg(pdev->udev, usb_sndctrlpipe(pdev->udev, 0),
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request,
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USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
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value, pdev->vcinterface,
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buf, buflen, USB_CTRL_SET_TIMEOUT);
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}
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static int set_video_mode_Nala(struct pwc_device *pdev, int size, int pixfmt,
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int frames, int *compression, int send_to_cam)
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{
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int fps, ret = 0;
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struct Nala_table_entry *pEntry;
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int frames2frames[31] =
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{ /* closest match of framerate */
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0, 0, 0, 0, 4, /* 0-4 */
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5, 5, 7, 7, 10, /* 5-9 */
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10, 10, 12, 12, 15, /* 10-14 */
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15, 15, 15, 20, 20, /* 15-19 */
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20, 20, 20, 24, 24, /* 20-24 */
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24, 24, 24, 24, 24, /* 25-29 */
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24 /* 30 */
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};
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int frames2table[31] =
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{ 0, 0, 0, 0, 0, /* 0-4 */
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1, 1, 1, 2, 2, /* 5-9 */
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3, 3, 4, 4, 4, /* 10-14 */
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5, 5, 5, 5, 5, /* 15-19 */
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6, 6, 6, 6, 7, /* 20-24 */
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7, 7, 7, 7, 7, /* 25-29 */
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7 /* 30 */
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};
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if (size < 0 || size > PSZ_CIF)
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return -EINVAL;
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if (frames < 4)
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frames = 4;
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else if (size > PSZ_QCIF && frames > 15)
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frames = 15;
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else if (frames > 25)
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frames = 25;
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frames = frames2frames[frames];
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fps = frames2table[frames];
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pEntry = &Nala_table[size][fps];
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if (pEntry->alternate == 0)
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return -EINVAL;
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if (send_to_cam)
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ret = send_video_command(pdev, pdev->vendpoint,
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pEntry->mode, 3);
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if (ret < 0)
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return ret;
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if (pEntry->compressed && pixfmt == V4L2_PIX_FMT_YUV420)
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pwc_dec1_init(pdev, pEntry->mode);
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/* Set various parameters */
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pdev->pixfmt = pixfmt;
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pdev->vframes = frames;
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pdev->valternate = pEntry->alternate;
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pdev->width = pwc_image_sizes[size][0];
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pdev->height = pwc_image_sizes[size][1];
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pdev->frame_size = (pdev->width * pdev->height * 3) / 2;
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if (pEntry->compressed) {
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if (pdev->release < 5) { /* 4 fold compression */
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pdev->vbandlength = 528;
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pdev->frame_size /= 4;
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}
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else {
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pdev->vbandlength = 704;
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pdev->frame_size /= 3;
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}
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}
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else
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pdev->vbandlength = 0;
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/* Let pwc-if.c:isoc_init know we don't support higher compression */
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*compression = 3;
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return 0;
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}
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static int set_video_mode_Timon(struct pwc_device *pdev, int size, int pixfmt,
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int frames, int *compression, int send_to_cam)
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{
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const struct Timon_table_entry *pChoose;
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int fps, ret = 0;
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if (size >= PSZ_MAX || *compression < 0 || *compression > 3)
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return -EINVAL;
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if (frames < 5)
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frames = 5;
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else if (size == PSZ_VGA && frames > 15)
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frames = 15;
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else if (frames > 30)
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frames = 30;
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fps = (frames / 5) - 1;
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/* Find a supported framerate with progressively higher compression */
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do {
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pChoose = &Timon_table[size][fps][*compression];
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if (pChoose->alternate != 0)
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break;
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(*compression)++;
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} while (*compression <= 3);
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if (pChoose->alternate == 0)
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return -ENOENT; /* Not supported. */
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if (send_to_cam)
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ret = send_video_command(pdev, pdev->vendpoint,
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pChoose->mode, 13);
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if (ret < 0)
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return ret;
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if (pChoose->bandlength > 0 && pixfmt == V4L2_PIX_FMT_YUV420)
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pwc_dec23_init(pdev, pChoose->mode);
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/* Set various parameters */
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pdev->pixfmt = pixfmt;
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pdev->vframes = (fps + 1) * 5;
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pdev->valternate = pChoose->alternate;
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pdev->width = pwc_image_sizes[size][0];
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pdev->height = pwc_image_sizes[size][1];
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pdev->vbandlength = pChoose->bandlength;
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if (pChoose->bandlength > 0)
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pdev->frame_size = (pChoose->bandlength * pdev->height) / 4;
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else
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pdev->frame_size = (pdev->width * pdev->height * 12) / 8;
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return 0;
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}
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static int set_video_mode_Kiara(struct pwc_device *pdev, int size, int pixfmt,
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int frames, int *compression, int send_to_cam)
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{
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const struct Kiara_table_entry *pChoose;
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int fps, ret = 0;
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if (size >= PSZ_MAX || *compression < 0 || *compression > 3)
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return -EINVAL;
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if (frames < 5)
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frames = 5;
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else if (size == PSZ_VGA && frames > 15)
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frames = 15;
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else if (frames > 30)
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frames = 30;
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fps = (frames / 5) - 1;
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/* Find a supported framerate with progressively higher compression */
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do {
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pChoose = &Kiara_table[size][fps][*compression];
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if (pChoose->alternate != 0)
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break;
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(*compression)++;
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} while (*compression <= 3);
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if (pChoose->alternate == 0)
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return -ENOENT; /* Not supported. */
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/* Firmware bug: video endpoint is 5, but commands are sent to endpoint 4 */
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if (send_to_cam)
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ret = send_video_command(pdev, 4, pChoose->mode, 12);
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if (ret < 0)
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return ret;
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if (pChoose->bandlength > 0 && pixfmt == V4L2_PIX_FMT_YUV420)
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pwc_dec23_init(pdev, pChoose->mode);
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/* All set and go */
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pdev->pixfmt = pixfmt;
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pdev->vframes = (fps + 1) * 5;
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pdev->valternate = pChoose->alternate;
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pdev->width = pwc_image_sizes[size][0];
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pdev->height = pwc_image_sizes[size][1];
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pdev->vbandlength = pChoose->bandlength;
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if (pdev->vbandlength > 0)
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pdev->frame_size = (pdev->vbandlength * pdev->height) / 4;
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else
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pdev->frame_size = (pdev->width * pdev->height * 12) / 8;
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PWC_TRACE("frame_size=%d, vframes=%d, vsize=%d, vbandlength=%d\n",
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pdev->frame_size, pdev->vframes, size, pdev->vbandlength);
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return 0;
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}
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int pwc_set_video_mode(struct pwc_device *pdev, int width, int height,
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int pixfmt, int frames, int *compression, int send_to_cam)
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{
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int ret, size;
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PWC_DEBUG_FLOW("set_video_mode(%dx%d @ %d, pixfmt %08x).\n",
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width, height, frames, pixfmt);
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size = pwc_get_size(pdev, width, height);
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PWC_TRACE("decode_size = %d.\n", size);
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if (DEVICE_USE_CODEC1(pdev->type)) {
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ret = set_video_mode_Nala(pdev, size, pixfmt, frames,
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compression, send_to_cam);
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} else if (DEVICE_USE_CODEC3(pdev->type)) {
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ret = set_video_mode_Kiara(pdev, size, pixfmt, frames,
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compression, send_to_cam);
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} else {
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ret = set_video_mode_Timon(pdev, size, pixfmt, frames,
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compression, send_to_cam);
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}
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if (ret < 0) {
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PWC_ERROR("Failed to set video mode %s@%d fps; return code = %d\n", size2name[size], frames, ret);
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return ret;
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}
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pdev->frame_total_size = pdev->frame_size + pdev->frame_header_size + pdev->frame_trailer_size;
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PWC_DEBUG_SIZE("Set resolution to %dx%d\n", pdev->width, pdev->height);
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return 0;
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}
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static unsigned int pwc_get_fps_Nala(struct pwc_device *pdev, unsigned int index, unsigned int size)
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{
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unsigned int i;
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for (i = 0; i < PWC_FPS_MAX_NALA; i++) {
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if (Nala_table[size][i].alternate) {
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if (index--==0) return Nala_fps_vector[i];
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}
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}
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return 0;
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}
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static unsigned int pwc_get_fps_Kiara(struct pwc_device *pdev, unsigned int index, unsigned int size)
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{
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unsigned int i;
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for (i = 0; i < PWC_FPS_MAX_KIARA; i++) {
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if (Kiara_table[size][i][3].alternate) {
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if (index--==0) return Kiara_fps_vector[i];
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}
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}
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return 0;
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}
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static unsigned int pwc_get_fps_Timon(struct pwc_device *pdev, unsigned int index, unsigned int size)
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{
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unsigned int i;
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for (i=0; i < PWC_FPS_MAX_TIMON; i++) {
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if (Timon_table[size][i][3].alternate) {
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if (index--==0) return Timon_fps_vector[i];
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}
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}
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return 0;
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}
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unsigned int pwc_get_fps(struct pwc_device *pdev, unsigned int index, unsigned int size)
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{
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unsigned int ret;
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if (DEVICE_USE_CODEC1(pdev->type)) {
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ret = pwc_get_fps_Nala(pdev, index, size);
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} else if (DEVICE_USE_CODEC3(pdev->type)) {
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ret = pwc_get_fps_Kiara(pdev, index, size);
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} else {
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ret = pwc_get_fps_Timon(pdev, index, size);
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}
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return ret;
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}
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int pwc_get_u8_ctrl(struct pwc_device *pdev, u8 request, u16 value, int *data)
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{
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int ret;
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ret = recv_control_msg(pdev, request, value, 1);
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if (ret < 0)
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return ret;
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*data = pdev->ctrl_buf[0];
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return 0;
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}
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int pwc_set_u8_ctrl(struct pwc_device *pdev, u8 request, u16 value, u8 data)
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{
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int ret;
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pdev->ctrl_buf[0] = data;
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ret = send_control_msg(pdev, request, value, pdev->ctrl_buf, 1);
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if (ret < 0)
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return ret;
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return 0;
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}
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int pwc_get_s8_ctrl(struct pwc_device *pdev, u8 request, u16 value, int *data)
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{
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int ret;
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ret = recv_control_msg(pdev, request, value, 1);
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if (ret < 0)
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return ret;
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*data = ((s8 *)pdev->ctrl_buf)[0];
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return 0;
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}
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int pwc_get_u16_ctrl(struct pwc_device *pdev, u8 request, u16 value, int *data)
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{
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int ret;
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ret = recv_control_msg(pdev, request, value, 2);
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if (ret < 0)
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return ret;
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*data = (pdev->ctrl_buf[1] << 8) | pdev->ctrl_buf[0];
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return 0;
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}
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int pwc_set_u16_ctrl(struct pwc_device *pdev, u8 request, u16 value, u16 data)
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{
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int ret;
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pdev->ctrl_buf[0] = data & 0xff;
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pdev->ctrl_buf[1] = data >> 8;
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ret = send_control_msg(pdev, request, value, pdev->ctrl_buf, 2);
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if (ret < 0)
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return ret;
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return 0;
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}
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int pwc_button_ctrl(struct pwc_device *pdev, u16 value)
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{
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int ret;
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ret = send_control_msg(pdev, SET_STATUS_CTL, value, NULL, 0);
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if (ret < 0)
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return ret;
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return 0;
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}
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/* POWER */
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void pwc_camera_power(struct pwc_device *pdev, int power)
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{
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int r;
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if (!pdev->power_save)
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return;
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if (pdev->type < 675 || (pdev->type < 730 && pdev->release < 6))
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return; /* Not supported by Nala or Timon < release 6 */
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if (power)
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pdev->ctrl_buf[0] = 0x00; /* active */
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else
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pdev->ctrl_buf[0] = 0xFF; /* power save */
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r = send_control_msg(pdev, SET_STATUS_CTL,
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SET_POWER_SAVE_MODE_FORMATTER, pdev->ctrl_buf, 1);
|
|
if (r < 0)
|
|
PWC_ERROR("Failed to power %s camera (%d)\n",
|
|
power ? "on" : "off", r);
|
|
}
|
|
|
|
int pwc_set_leds(struct pwc_device *pdev, int on_value, int off_value)
|
|
{
|
|
int r;
|
|
|
|
if (pdev->type < 730)
|
|
return 0;
|
|
on_value /= 100;
|
|
off_value /= 100;
|
|
if (on_value < 0)
|
|
on_value = 0;
|
|
if (on_value > 0xff)
|
|
on_value = 0xff;
|
|
if (off_value < 0)
|
|
off_value = 0;
|
|
if (off_value > 0xff)
|
|
off_value = 0xff;
|
|
|
|
pdev->ctrl_buf[0] = on_value;
|
|
pdev->ctrl_buf[1] = off_value;
|
|
|
|
r = send_control_msg(pdev,
|
|
SET_STATUS_CTL, LED_FORMATTER, pdev->ctrl_buf, 2);
|
|
if (r < 0)
|
|
PWC_ERROR("Failed to set LED on/off time (%d)\n", r);
|
|
|
|
return r;
|
|
}
|
|
|
|
#ifdef CONFIG_USB_PWC_DEBUG
|
|
int pwc_get_cmos_sensor(struct pwc_device *pdev, int *sensor)
|
|
{
|
|
int ret, request;
|
|
|
|
if (pdev->type < 675)
|
|
request = SENSOR_TYPE_FORMATTER1;
|
|
else if (pdev->type < 730)
|
|
return -1; /* The Vesta series doesn't have this call */
|
|
else
|
|
request = SENSOR_TYPE_FORMATTER2;
|
|
|
|
ret = recv_control_msg(pdev, GET_STATUS_CTL, request, 1);
|
|
if (ret < 0)
|
|
return ret;
|
|
if (pdev->type < 675)
|
|
*sensor = pdev->ctrl_buf[0] | 0x100;
|
|
else
|
|
*sensor = pdev->ctrl_buf[0];
|
|
return 0;
|
|
}
|
|
#endif
|