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https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
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[media] pwc: Use one shared usb command buffer
The pwc driver used to: 1. kmalloc a buffer 2. memcpy data to send over usb there 3. do the usb_control_msg call (which does not work with data on the stack) 4. free the buffer For every usb command send. This patch changes the code to instead malloc a buffer for this purpose once and use it everywhere. [mchehab@redhat.com: Fix a compilation breakage with allyesconfig: drivers/media/video/pwc/pwc-ctrl.c: In function ‘pwc_get_cmos_sensor’: drivers/media/video/pwc/pwc-ctrl.c:546:3: warning: passing argument 4 of ‘recv_control_msg’ makes integer from pointer without a cast [en$ drivers/media/video/pwc/pwc-ctrl.c:107:12: note: expected ‘int’ but argument is of type ‘unsigned char *’ drivers/media/video/pwc/pwc-ctrl.c:546:3: error: too many arguments to function ‘recv_control_msg’ drivers/media/video/pwc/pwc-ctrl.c:107:12: note: declared here] Signed-off-by: Hans de Goede <hdegoede@redhat.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Hans de Goede
Mauro Carvalho Chehab
parent
1c852201a2
commit
24be689bfb
8 changed files with 81 additions and 118 deletions
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@ -104,47 +104,16 @@ static struct Nala_table_entry Nala_table[PSZ_MAX][PWC_FPS_MAX_NALA] =
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/****************************************************************************/
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static int _send_control_msg(struct pwc_device *pdev,
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u8 request, u16 value, int index, void *buf, int buflen)
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{
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int rc;
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void *kbuf = NULL;
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if (buflen) {
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kbuf = kmemdup(buf, buflen, GFP_KERNEL); /* not allowed on stack */
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if (kbuf == NULL)
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return -ENOMEM;
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}
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rc = 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,
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index,
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kbuf, buflen, USB_CTRL_SET_TIMEOUT);
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kfree(kbuf);
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return rc;
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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, void *buf, int buflen)
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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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void *kbuf = kmalloc(buflen, GFP_KERNEL); /* not allowed on stack */
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if (kbuf == NULL)
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return -ENOMEM;
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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,
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pdev->vcinterface,
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kbuf, buflen, USB_CTRL_GET_TIMEOUT);
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memcpy(buf, kbuf, buflen);
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kfree(kbuf);
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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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@ -152,26 +121,38 @@ static int recv_control_msg(struct pwc_device *pdev,
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}
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static inline int send_video_command(struct pwc_device *pdev,
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int index, void *buf, int buflen)
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int index, const unsigned char *buf, int buflen)
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{
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return _send_control_msg(pdev,
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SET_EP_STREAM_CTL,
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VIDEO_OUTPUT_CONTROL_FORMATTER,
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index,
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buf, buflen);
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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 _send_control_msg(pdev,
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request, value, pdev->vcinterface, buf, buflen);
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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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unsigned char buf[3];
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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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@ -206,18 +187,14 @@ static int set_video_mode_Nala(struct pwc_device *pdev, int size, int pixfmt,
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if (pEntry->alternate == 0)
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return -EINVAL;
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memcpy(buf, pEntry->mode, 3);
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if (send_to_cam)
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ret = send_video_command(pdev, pdev->vendpoint, buf, 3);
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if (ret < 0) {
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PWC_DEBUG_MODULE("Failed to send video command... %d\n", ret);
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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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}
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if (pEntry->compressed && pixfmt == V4L2_PIX_FMT_YUV420)
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pwc_dec1_init(pdev, buf);
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pdev->cmd_len = 3;
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memcpy(pdev->cmd_buf, buf, 3);
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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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@ -249,7 +226,6 @@ static int set_video_mode_Nala(struct pwc_device *pdev, int size, int pixfmt,
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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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unsigned char buf[13];
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const struct Timon_table_entry *pChoose;
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int fps, ret = 0;
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@ -274,17 +250,14 @@ static int set_video_mode_Timon(struct pwc_device *pdev, int size, int pixfmt,
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if (pChoose == NULL || pChoose->alternate == 0)
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return -ENOENT; /* Not supported. */
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memcpy(buf, pChoose->mode, 13);
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if (send_to_cam)
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ret = send_video_command(pdev, pdev->vendpoint, buf, 13);
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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, buf);
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pdev->cmd_len = 13;
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memcpy(pdev->cmd_buf, buf, 13);
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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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@ -306,7 +279,6 @@ static int set_video_mode_Kiara(struct pwc_device *pdev, int size, int pixfmt,
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{
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const struct Kiara_table_entry *pChoose = NULL;
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int fps, ret = 0;
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unsigned char buf[12];
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if (size >= PSZ_MAX || *compression < 0 || *compression > 3)
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return -EINVAL;
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@ -328,22 +300,15 @@ static int set_video_mode_Kiara(struct pwc_device *pdev, int size, int pixfmt,
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if (pChoose == NULL || pChoose->alternate == 0)
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return -ENOENT; /* Not supported. */
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PWC_TRACE("Using alternate setting %d.\n", pChoose->alternate);
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/* usb_control_msg won't take staticly allocated arrays as argument?? */
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memcpy(buf, pChoose->mode, 12);
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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, buf, 12);
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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, buf);
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pwc_dec23_init(pdev, pChoose->mode);
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pdev->cmd_len = 12;
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memcpy(pdev->cmd_buf, buf, 12);
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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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@ -445,13 +410,12 @@ unsigned int pwc_get_fps(struct pwc_device *pdev, unsigned int index, unsigned i
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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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u8 buf;
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ret = recv_control_msg(pdev, request, value, &buf, sizeof(buf));
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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 = buf;
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*data = pdev->ctrl_buf[0];
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return 0;
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}
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@ -459,7 +423,8 @@ 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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ret = send_control_msg(pdev, request, value, &data, sizeof(data));
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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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@ -469,37 +434,34 @@ int pwc_set_u8_ctrl(struct pwc_device *pdev, u8 request, u16 value, u8 data)
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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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s8 buf;
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ret = recv_control_msg(pdev, request, value, &buf, sizeof(buf));
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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 = buf;
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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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u8 buf[2];
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ret = recv_control_msg(pdev, request, value, buf, sizeof(buf));
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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 = (buf[1] << 8) | buf[0];
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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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u8 buf[2];
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buf[0] = data & 0xff;
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buf[1] = data >> 8;
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ret = send_control_msg(pdev, request, value, buf, sizeof(buf));
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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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@ -520,7 +482,6 @@ int pwc_button_ctrl(struct pwc_device *pdev, u16 value)
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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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char buf;
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int r;
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if (!pdev->power_save)
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@ -530,13 +491,11 @@ void pwc_camera_power(struct pwc_device *pdev, int power)
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return; /* Not supported by Nala or Timon < release 6 */
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if (power)
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buf = 0x00; /* active */
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pdev->ctrl_buf[0] = 0x00; /* active */
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else
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buf = 0xFF; /* power save */
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r = send_control_msg(pdev,
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SET_STATUS_CTL, SET_POWER_SAVE_MODE_FORMATTER,
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&buf, sizeof(buf));
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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);
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if (r < 0)
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PWC_ERROR("Failed to power %s camera (%d)\n",
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power ? "on" : "off", r);
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@ -544,7 +503,6 @@ void pwc_camera_power(struct pwc_device *pdev, int power)
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int pwc_set_leds(struct pwc_device *pdev, int on_value, int off_value)
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{
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unsigned char buf[2];
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int r;
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if (pdev->type < 730)
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@ -560,11 +518,11 @@ int pwc_set_leds(struct pwc_device *pdev, int on_value, int off_value)
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if (off_value > 0xff)
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off_value = 0xff;
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buf[0] = on_value;
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buf[1] = off_value;
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pdev->ctrl_buf[0] = on_value;
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pdev->ctrl_buf[1] = off_value;
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r = send_control_msg(pdev,
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SET_STATUS_CTL, LED_FORMATTER, &buf, sizeof(buf));
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SET_STATUS_CTL, LED_FORMATTER, pdev->ctrl_buf, 2);
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if (r < 0)
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PWC_ERROR("Failed to set LED on/off time (%d)\n", r);
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@ -574,7 +532,6 @@ int pwc_set_leds(struct pwc_device *pdev, int on_value, int off_value)
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#ifdef CONFIG_USB_PWC_DEBUG
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int pwc_get_cmos_sensor(struct pwc_device *pdev, int *sensor)
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{
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unsigned char buf;
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int ret = -1, request;
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if (pdev->type < 675)
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@ -584,14 +541,13 @@ int pwc_get_cmos_sensor(struct pwc_device *pdev, int *sensor)
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else
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request = SENSOR_TYPE_FORMATTER2;
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ret = recv_control_msg(pdev,
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GET_STATUS_CTL, request, &buf, sizeof(buf));
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ret = recv_control_msg(pdev, GET_STATUS_CTL, request, 1);
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if (ret < 0)
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return ret;
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if (pdev->type < 675)
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*sensor = buf | 0x100;
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*sensor = pdev->ctrl_buf[0] | 0x100;
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else
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*sensor = buf;
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*sensor = pdev->ctrl_buf[0];
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return 0;
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}
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#endif
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@ -24,7 +24,7 @@
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*/
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#include "pwc.h"
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void pwc_dec1_init(struct pwc_device *pdev, void *buffer)
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void pwc_dec1_init(struct pwc_device *pdev, const unsigned char *cmd)
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{
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struct pwc_dec1_private *pdec = &pdev->dec1;
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@ -34,6 +34,6 @@ struct pwc_dec1_private
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int version;
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};
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void pwc_dec1_init(struct pwc_device *pdev, void *buffer);
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void pwc_dec1_init(struct pwc_device *pdev, const unsigned char *cmd);
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#endif
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@ -294,7 +294,7 @@ static unsigned char pwc_crop_table[256 + 2*MAX_OUTER_CROP_VALUE];
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/* If the type or the command change, we rebuild the lookup table */
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void pwc_dec23_init(struct pwc_device *pdev, unsigned char *cmd)
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void pwc_dec23_init(struct pwc_device *pdev, const unsigned char *cmd)
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{
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int flags, version, shift, i;
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struct pwc_dec23_private *pdec = &pdev->dec23;
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@ -54,7 +54,7 @@ struct pwc_dec23_private
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};
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void pwc_dec23_init(struct pwc_device *pdev, unsigned char *cmd);
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void pwc_dec23_init(struct pwc_device *pdev, const unsigned char *cmd);
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void pwc_dec23_decompress(struct pwc_device *pdev,
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const void *src,
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void *dst);
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@ -605,6 +605,7 @@ static void pwc_video_release(struct v4l2_device *v)
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v4l2_ctrl_handler_free(&pdev->ctrl_handler);
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kfree(pdev->ctrl_buf);
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kfree(pdev);
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}
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@ -1115,6 +1116,14 @@ static int usb_pwc_probe(struct usb_interface *intf, const struct usb_device_id
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if (hint < MAX_DEV_HINTS)
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device_hint[hint].pdev = pdev;
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/* Allocate USB command buffers */
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pdev->ctrl_buf = kmalloc(sizeof(pdev->cmd_buf), GFP_KERNEL);
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if (!pdev->ctrl_buf) {
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PWC_ERROR("Oops, could not allocate memory for pwc_device.\n");
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rc = -ENOMEM;
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goto err_free_mem;
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}
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#ifdef CONFIG_USB_PWC_DEBUG
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/* Query sensor type */
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if (pwc_get_cmos_sensor(pdev, &rc) >= 0) {
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@ -1199,6 +1208,7 @@ static int usb_pwc_probe(struct usb_interface *intf, const struct usb_device_id
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err_free_mem:
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if (hint < MAX_DEV_HINTS)
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device_hint[hint].pdev = NULL;
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kfree(pdev->ctrl_buf);
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kfree(pdev);
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return rc;
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}
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@ -772,33 +772,33 @@ static int pwc_set_autogain_expo(struct pwc_device *pdev)
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static int pwc_set_motor(struct pwc_device *pdev)
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{
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int ret;
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u8 buf[4];
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||||
|
||||
buf[0] = 0;
|
||||
pdev->ctrl_buf[0] = 0;
|
||||
if (pdev->motor_pan_reset->is_new)
|
||||
buf[0] |= 0x01;
|
||||
pdev->ctrl_buf[0] |= 0x01;
|
||||
if (pdev->motor_tilt_reset->is_new)
|
||||
buf[0] |= 0x02;
|
||||
pdev->ctrl_buf[0] |= 0x02;
|
||||
if (pdev->motor_pan_reset->is_new || pdev->motor_tilt_reset->is_new) {
|
||||
ret = send_control_msg(pdev, SET_MPT_CTL,
|
||||
PT_RESET_CONTROL_FORMATTER, buf, 1);
|
||||
PT_RESET_CONTROL_FORMATTER,
|
||||
pdev->ctrl_buf, 1);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
}
|
||||
|
||||
memset(buf, 0, sizeof(buf));
|
||||
memset(pdev->ctrl_buf, 0, 4);
|
||||
if (pdev->motor_pan->is_new) {
|
||||
buf[0] = pdev->motor_pan->val & 0xFF;
|
||||
buf[1] = (pdev->motor_pan->val >> 8);
|
||||
pdev->ctrl_buf[0] = pdev->motor_pan->val & 0xFF;
|
||||
pdev->ctrl_buf[1] = (pdev->motor_pan->val >> 8);
|
||||
}
|
||||
if (pdev->motor_tilt->is_new) {
|
||||
buf[2] = pdev->motor_tilt->val & 0xFF;
|
||||
buf[3] = (pdev->motor_tilt->val >> 8);
|
||||
pdev->ctrl_buf[2] = pdev->motor_tilt->val & 0xFF;
|
||||
pdev->ctrl_buf[3] = (pdev->motor_tilt->val >> 8);
|
||||
}
|
||||
if (pdev->motor_pan->is_new || pdev->motor_tilt->is_new) {
|
||||
ret = send_control_msg(pdev, SET_MPT_CTL,
|
||||
PT_RELATIVE_CONTROL_FORMATTER,
|
||||
buf, sizeof(buf));
|
||||
pdev->ctrl_buf, 4);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
}
|
||||
|
|
|
|||
|
|
@ -134,9 +134,6 @@
|
|||
#define DEVICE_USE_CODEC3(x) ((x)>=700)
|
||||
#define DEVICE_USE_CODEC23(x) ((x)>=675)
|
||||
|
||||
/* from pwc-dec.h */
|
||||
#define PWCX_FLAG_PLANAR 0x0001
|
||||
|
||||
/* Request types: video */
|
||||
#define SET_LUM_CTL 0x01
|
||||
#define GET_LUM_CTL 0x02
|
||||
|
|
@ -250,8 +247,8 @@ struct pwc_device
|
|||
char vmirror; /* for ToUCaM series */
|
||||
char power_save; /* Do powersaving for this cam */
|
||||
|
||||
int cmd_len;
|
||||
unsigned char cmd_buf[13];
|
||||
unsigned char *ctrl_buf;
|
||||
|
||||
struct urb *urbs[MAX_ISO_BUFS];
|
||||
char iso_init;
|
||||
|
|
|
|||
Loading…
Reference in a new issue