On Wed, 26 Sep 2007 12:12:50 -0700 Brett Warden wrote:
> Appeases the warning "parport0 (bw-qcam): use data_reverse for this!"
>
> Signed-off-by: Brett T. Warden <[email protected]>
>
Where does the warning come from? (what software produces it?)
> ---
>
> It seems to work fine with my Quickcam under 2.6.22.
>
> diff --git a/drivers/media/video/bw-qcam.c b/drivers/media/video/bw-qcam.c
> index 7d47cbe..01e47ed 100644
> --- a/drivers/media/video/bw-qcam.c
> +++ b/drivers/media/video/bw-qcam.c
> @@ -107,6 +107,11 @@ static inline void write_lpcontrol(struct
> qcam_device *q, int d)
> parport_write_control(q->pport, d);
> }
>
> +static inline void reverse_port(struct qcam_device *q)
> +{
> + parport_data_reverse(q->pport);
> +}
> +
> static int qc_waithand(struct qcam_device *q, int val);
> static int qc_command(struct qcam_device *q, int command);
> static int qc_readparam(struct qcam_device *q);
> @@ -369,7 +374,11 @@ static void qc_reset(struct qcam_device *q)
> break;
>
> case QC_ANY:
> - write_lpcontrol(q, 0x20);
> + /*
> + * Replaced with reverse_port
> + * write_lpcontrol(q, 0x20);
> + */
> + reverse_port(q);
> write_lpdata(q, 0x75);
>
> if (read_lpdata(q) != 0x75) {
> @@ -512,10 +521,12 @@ static inline int qc_readbytes(struct
> qcam_device *q, char buffer[])
> switch (q->port_mode & QC_MODE_MASK)
> {
> case QC_BIDIR: /* Bi-directional Port */
> - write_lpcontrol(q, 0x26);
> + reverse_port(q);
> + write_lpcontrol(q, 0x6);
> lo = (qc_waithand2(q, 1) >> 1);
> hi = (read_lpstatus(q) >> 3) & 0x1f;
> - write_lpcontrol(q, 0x2e);
> + reverse_port(q);
> + write_lpcontrol(q, 0xe);
> lo2 = (qc_waithand2(q, 0) >> 1);
> hi2 = (read_lpstatus(q) >> 3) & 0x1f;
> switch (q->bpp)
> @@ -613,10 +624,13 @@ static long qc_capture(struct qcam_device * q,
> char __user *buf, unsigned long l
>
> if ((q->port_mode & QC_MODE_MASK) == QC_BIDIR)
> {
> - write_lpcontrol(q, 0x2e); /* turn port around */
> - write_lpcontrol(q, 0x26);
> + reverse_port(q); /* turn port around */
> + write_lpcontrol(q, 0xe);
> + reverse_port(q);
> + write_lpcontrol(q, 0x6);
> (void) qc_waithand(q, 1);
> - write_lpcontrol(q, 0x2e);
> + reverse_port(q);
> + write_lpcontrol(q, 0xe);
> (void) qc_waithand(q, 0);
> }
>
>
>
> --
---
~Randy
Phaedrus says that Quality is about caring.
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