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authorMauro Carvalho Chehab <mchehab@redhat.com>2012-08-14 15:12:06 -0300
committerMauro Carvalho Chehab <mchehab@redhat.com>2012-08-15 16:41:37 -0300
commitd1677dc31ac1918f6a91e77ab74d456df01f2bb2 (patch)
tree643800823d727f3c958ac3ab2f52024752cfd585 /drivers/media/parport
parente5cdf69d36f667d9840ce050abbe4a95c2a6b536 (diff)
downloadlinux-d1677dc31ac1918f6a91e77ab74d456df01f2bb2.tar.gz
[media] move parallel port/isa video drivers to drivers/media/parport/
We should keep just the I2C drivers under drivers/media/video, and then rename it to drivers/media/i2c. Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'drivers/media/parport')
-rw-r--r--drivers/media/parport/Kconfig47
-rw-r--r--drivers/media/parport/Makefile4
-rw-r--r--drivers/media/parport/bw-qcam.c1113
-rw-r--r--drivers/media/parport/c-qcam.c883
-rw-r--r--drivers/media/parport/pms.c1152
-rw-r--r--drivers/media/parport/w9966.c981
6 files changed, 4180 insertions, 0 deletions
diff --git a/drivers/media/parport/Kconfig b/drivers/media/parport/Kconfig
new file mode 100644
index 00000000000..48138fe46e0
--- /dev/null
+++ b/drivers/media/parport/Kconfig
@@ -0,0 +1,47 @@
+menu "V4L ISA and parallel port devices"
+ visible if (ISA || PARPORT) && MEDIA_CAMERA_SUPPORT
+
+config VIDEO_BWQCAM
+ tristate "Quickcam BW Video For Linux"
+ depends on PARPORT && VIDEO_V4L2
+ help
+ Say Y have if you the black and white version of the QuickCam
+ camera. See the next option for the color version.
+
+ To compile this driver as a module, choose M here: the
+ module will be called bw-qcam.
+
+config VIDEO_CQCAM
+ tristate "QuickCam Colour Video For Linux"
+ depends on PARPORT && VIDEO_V4L2
+ help
+ This is the video4linux driver for the colour version of the
+ Connectix QuickCam. If you have one of these cameras, say Y here,
+ otherwise say N. This driver does not work with the original
+ monochrome QuickCam, QuickCam VC or QuickClip. It is also available
+ as a module (c-qcam).
+ Read <file:Documentation/video4linux/CQcam.txt> for more information.
+
+config VIDEO_PMS
+ tristate "Mediavision Pro Movie Studio Video For Linux"
+ depends on ISA && VIDEO_V4L2
+ help
+ Say Y if you have the ISA Mediavision Pro Movie Studio
+ capture card.
+
+ To compile this driver as a module, choose M here: the
+ module will be called pms.
+
+config VIDEO_W9966
+ tristate "W9966CF Webcam (FlyCam Supra and others) Video For Linux"
+ depends on PARPORT_1284 && PARPORT && VIDEO_V4L2
+ help
+ Video4linux driver for Winbond's w9966 based Webcams.
+ Currently tested with the LifeView FlyCam Supra.
+ If you have one of these cameras, say Y here
+ otherwise say N.
+ This driver is also available as a module (w9966).
+
+ Check out <file:Documentation/video4linux/w9966.txt> for more
+ information.
+endmenu
diff --git a/drivers/media/parport/Makefile b/drivers/media/parport/Makefile
new file mode 100644
index 00000000000..4eea06d7af5
--- /dev/null
+++ b/drivers/media/parport/Makefile
@@ -0,0 +1,4 @@
+obj-$(CONFIG_VIDEO_CQCAM) += c-qcam.o
+obj-$(CONFIG_VIDEO_BWQCAM) += bw-qcam.o
+obj-$(CONFIG_VIDEO_W9966) += w9966.o
+obj-$(CONFIG_VIDEO_PMS) += pms.o
diff --git a/drivers/media/parport/bw-qcam.c b/drivers/media/parport/bw-qcam.c
new file mode 100644
index 00000000000..5b75a64b199
--- /dev/null
+++ b/drivers/media/parport/bw-qcam.c
@@ -0,0 +1,1113 @@
+/*
+ * QuickCam Driver For Video4Linux.
+ *
+ * Video4Linux conversion work by Alan Cox.
+ * Parport compatibility by Phil Blundell.
+ * Busy loop avoidance by Mark Cooke.
+ *
+ * Module parameters:
+ *
+ * maxpoll=<1 - 5000>
+ *
+ * When polling the QuickCam for a response, busy-wait for a
+ * maximum of this many loops. The default of 250 gives little
+ * impact on interactive response.
+ *
+ * NOTE: If this parameter is set too high, the processor
+ * will busy wait until this loop times out, and then
+ * slowly poll for a further 5 seconds before failing
+ * the transaction. You have been warned.
+ *
+ * yieldlines=<1 - 250>
+ *
+ * When acquiring a frame from the camera, the data gathering
+ * loop will yield back to the scheduler after completing
+ * this many lines. The default of 4 provides a trade-off
+ * between increased frame acquisition time and impact on
+ * interactive response.
+ */
+
+/* qcam-lib.c -- Library for programming with the Connectix QuickCam.
+ * See the included documentation for usage instructions and details
+ * of the protocol involved. */
+
+
+/* Version 0.5, August 4, 1996 */
+/* Version 0.7, August 27, 1996 */
+/* Version 0.9, November 17, 1996 */
+
+
+/******************************************************************
+
+Copyright (C) 1996 by Scott Laird
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+IN NO EVENT SHALL SCOTT LAIRD BE LIABLE FOR ANY CLAIM, DAMAGES OR
+OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+OTHER DEALINGS IN THE SOFTWARE.
+
+******************************************************************/
+
+#include <linux/module.h>
+#include <linux/delay.h>
+#include <linux/errno.h>
+#include <linux/fs.h>
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/mm.h>
+#include <linux/parport.h>
+#include <linux/sched.h>
+#include <linux/videodev2.h>
+#include <linux/mutex.h>
+#include <asm/uaccess.h>
+#include <media/v4l2-common.h>
+#include <media/v4l2-ioctl.h>
+#include <media/v4l2-device.h>
+#include <media/v4l2-fh.h>
+#include <media/v4l2-ctrls.h>
+#include <media/v4l2-event.h>
+
+/* One from column A... */
+#define QC_NOTSET 0
+#define QC_UNIDIR 1
+#define QC_BIDIR 2
+#define QC_SERIAL 3
+
+/* ... and one from column B */
+#define QC_ANY 0x00
+#define QC_FORCE_UNIDIR 0x10
+#define QC_FORCE_BIDIR 0x20
+#define QC_FORCE_SERIAL 0x30
+/* in the port_mode member */
+
+#define QC_MODE_MASK 0x07
+#define QC_FORCE_MASK 0x70
+
+#define MAX_HEIGHT 243
+#define MAX_WIDTH 336
+
+/* Bit fields for status flags */
+#define QC_PARAM_CHANGE 0x01 /* Camera status change has occurred */
+
+struct qcam {
+ struct v4l2_device v4l2_dev;
+ struct video_device vdev;
+ struct v4l2_ctrl_handler hdl;
+ struct pardevice *pdev;
+ struct parport *pport;
+ struct mutex lock;
+ int width, height;
+ int bpp;
+ int mode;
+ int contrast, brightness, whitebal;
+ int port_mode;
+ int transfer_scale;
+ int top, left;
+ int status;
+ unsigned int saved_bits;
+ unsigned long in_use;
+};
+
+static unsigned int maxpoll = 250; /* Maximum busy-loop count for qcam I/O */
+static unsigned int yieldlines = 4; /* Yield after this many during capture */
+static int video_nr = -1;
+static unsigned int force_init; /* Whether to probe aggressively */
+
+module_param(maxpoll, int, 0);
+module_param(yieldlines, int, 0);
+module_param(video_nr, int, 0);
+
+/* Set force_init=1 to avoid detection by polling status register and
+ * immediately attempt to initialize qcam */
+module_param(force_init, int, 0);
+
+#define MAX_CAMS 4
+static struct qcam *qcams[MAX_CAMS];
+static unsigned int num_cams;
+
+static inline int read_lpstatus(struct qcam *q)
+{
+ return parport_read_status(q->pport);
+}
+
+static inline int read_lpdata(struct qcam *q)
+{
+ return parport_read_data(q->pport);
+}
+
+static inline void write_lpdata(struct qcam *q, int d)
+{
+ parport_write_data(q->pport, d);
+}
+
+static void write_lpcontrol(struct qcam *q, int d)
+{
+ if (d & 0x20) {
+ /* Set bidirectional mode to reverse (data in) */
+ parport_data_reverse(q->pport);
+ } else {
+ /* Set bidirectional mode to forward (data out) */
+ parport_data_forward(q->pport);
+ }
+
+ /* Now issue the regular port command, but strip out the
+ * direction flag */
+ d &= ~0x20;
+ parport_write_control(q->pport, d);
+}
+
+
+/* qc_waithand busy-waits for a handshake signal from the QuickCam.
+ * Almost all communication with the camera requires handshaking. */
+
+static int qc_waithand(struct qcam *q, int val)
+{
+ int status;
+ int runs = 0;
+
+ if (val) {
+ while (!((status = read_lpstatus(q)) & 8)) {
+ /* 1000 is enough spins on the I/O for all normal
+ cases, at that point we start to poll slowly
+ until the camera wakes up. However, we are
+ busy blocked until the camera responds, so
+ setting it lower is much better for interactive
+ response. */
+
+ if (runs++ > maxpoll)
+ msleep_interruptible(5);
+ if (runs > (maxpoll + 1000)) /* 5 seconds */
+ return -1;
+ }
+ } else {
+ while (((status = read_lpstatus(q)) & 8)) {
+ /* 1000 is enough spins on the I/O for all normal
+ cases, at that point we start to poll slowly
+ until the camera wakes up. However, we are
+ busy blocked until the camera responds, so
+ setting it lower is much better for interactive
+ response. */
+
+ if (runs++ > maxpoll)
+ msleep_interruptible(5);
+ if (runs++ > (maxpoll + 1000)) /* 5 seconds */
+ return -1;
+ }
+ }
+
+ return status;
+}
+
+/* Waithand2 is used when the qcam is in bidirectional mode, and the
+ * handshaking signal is CamRdy2 (bit 0 of data reg) instead of CamRdy1
+ * (bit 3 of status register). It also returns the last value read,
+ * since this data is useful. */
+
+static unsigned int qc_waithand2(struct qcam *q, int val)
+{
+ unsigned int status;
+ int runs = 0;
+
+ do {
+ status = read_lpdata(q);
+ /* 1000 is enough spins on the I/O for all normal
+ cases, at that point we start to poll slowly
+ until the camera wakes up. However, we are
+ busy blocked until the camera responds, so
+ setting it lower is much better for interactive
+ response. */
+
+ if (runs++ > maxpoll)
+ msleep_interruptible(5);
+ if (runs++ > (maxpoll + 1000)) /* 5 seconds */
+ return 0;
+ } while ((status & 1) != val);
+
+ return status;
+}
+
+/* qc_command is probably a bit of a misnomer -- it's used to send
+ * bytes *to* the camera. Generally, these bytes are either commands
+ * or arguments to commands, so the name fits, but it still bugs me a
+ * bit. See the documentation for a list of commands. */
+
+static int qc_command(struct qcam *q, int command)
+{
+ int n1, n2;
+ int cmd;
+
+ write_lpdata(q, command);
+ write_lpcontrol(q, 6);
+
+ n1 = qc_waithand(q, 1);
+
+ write_lpcontrol(q, 0xe);
+ n2 = qc_waithand(q, 0);
+
+ cmd = (n1 & 0xf0) | ((n2 & 0xf0) >> 4);
+ return cmd;
+}
+
+static int qc_readparam(struct qcam *q)
+{
+ int n1, n2;
+ int cmd;
+
+ write_lpcontrol(q, 6);
+ n1 = qc_waithand(q, 1);
+
+ write_lpcontrol(q, 0xe);
+ n2 = qc_waithand(q, 0);
+
+ cmd = (n1 & 0xf0) | ((n2 & 0xf0) >> 4);
+ return cmd;
+}
+
+
+/* Try to detect a QuickCam. It appears to flash the upper 4 bits of
+ the status register at 5-10 Hz. This is only used in the autoprobe
+ code. Be aware that this isn't the way Connectix detects the
+ camera (they send a reset and try to handshake), but this should be
+ almost completely safe, while their method screws up my printer if
+ I plug it in before the camera. */
+
+static int qc_detect(struct qcam *q)
+{
+ int reg, lastreg;
+ int count = 0;
+ int i;
+
+ if (force_init)
+ return 1;
+
+ lastreg = reg = read_lpstatus(q) & 0xf0;
+
+ for (i = 0; i < 500; i++) {
+ reg = read_lpstatus(q) & 0xf0;
+ if (reg != lastreg)
+ count++;
+ lastreg = reg;
+ mdelay(2);
+ }
+
+
+#if 0
+ /* Force camera detection during testing. Sometimes the camera
+ won't be flashing these bits. Possibly unloading the module
+ in the middle of a grab? Or some timeout condition?
+ I've seen this parameter as low as 19 on my 450Mhz box - mpc */
+ printk(KERN_DEBUG "Debugging: QCam detection counter <30-200 counts as detected>: %d\n", count);
+ return 1;
+#endif
+
+ /* Be (even more) liberal in what you accept... */
+
+ if (count > 20 && count < 400) {
+ return 1; /* found */
+ } else {
+ printk(KERN_ERR "No Quickcam found on port %s\n",
+ q->pport->name);
+ printk(KERN_DEBUG "Quickcam detection counter: %u\n", count);
+ return 0; /* not found */
+ }
+}
+
+/* Decide which scan mode to use. There's no real requirement that
+ * the scanmode match the resolution in q->height and q-> width -- the
+ * camera takes the picture at the resolution specified in the
+ * "scanmode" and then returns the image at the resolution specified
+ * with the resolution commands. If the scan is bigger than the
+ * requested resolution, the upper-left hand corner of the scan is
+ * returned. If the scan is smaller, then the rest of the image
+ * returned contains garbage. */
+
+static int qc_setscanmode(struct qcam *q)
+{
+ int old_mode = q->mode;
+
+ switch (q->transfer_scale) {
+ case 1:
+ q->mode = 0;
+ break;
+ case 2:
+ q->mode = 4;
+ break;
+ case 4:
+ q->mode = 8;
+ break;
+ }
+
+ switch (q->bpp) {
+ case 4:
+ break;
+ case 6:
+ q->mode += 2;
+ break;
+ }
+
+ switch (q->port_mode & QC_MODE_MASK) {
+ case QC_BIDIR:
+ q->mode += 1;
+ break;
+ case QC_NOTSET:
+ case QC_UNIDIR:
+ break;
+ }
+
+ if (q->mode != old_mode)
+ q->status |= QC_PARAM_CHANGE;
+
+ return 0;
+}
+
+
+/* Reset the QuickCam. This uses the same sequence the Windows
+ * QuickPic program uses. Someone with a bi-directional port should
+ * check that bi-directional mode is detected right, and then
+ * implement bi-directional mode in qc_readbyte(). */
+
+static void qc_reset(struct qcam *q)
+{
+ switch (q->port_mode & QC_FORCE_MASK) {
+ case QC_FORCE_UNIDIR:
+ q->port_mode = (q->port_mode & ~QC_MODE_MASK) | QC_UNIDIR;
+ break;
+
+ case QC_FORCE_BIDIR:
+ q->port_mode = (q->port_mode & ~QC_MODE_MASK) | QC_BIDIR;
+ break;
+
+ case QC_ANY:
+ write_lpcontrol(q, 0x20);
+ write_lpdata(q, 0x75);
+
+ if (read_lpdata(q) != 0x75)
+ q->port_mode = (q->port_mode & ~QC_MODE_MASK) | QC_BIDIR;
+ else
+ q->port_mode = (q->port_mode & ~QC_MODE_MASK) | QC_UNIDIR;
+ break;
+ }
+
+ write_lpcontrol(q, 0xb);
+ udelay(250);
+ write_lpcontrol(q, 0xe);
+ qc_setscanmode(q); /* in case port_mode changed */
+}
+
+
+
+/* Reset the QuickCam and program for brightness, contrast,
+ * white-balance, and resolution. */
+
+static void qc_set(struct qcam *q)
+{
+ int val;
+ int val2;
+
+ qc_reset(q);
+
+ /* Set the brightness. Yes, this is repetitive, but it works.
+ * Shorter versions seem to fail subtly. Feel free to try :-). */
+ /* I think the problem was in qc_command, not here -- bls */
+
+ qc_command(q, 0xb);
+ qc_command(q, q->brightness);
+
+ val = q->height / q->transfer_scale;
+ qc_command(q, 0x11);
+ qc_command(q, val);
+ if ((q->port_mode & QC_MODE_MASK) == QC_UNIDIR && q->bpp == 6) {
+ /* The normal "transfers per line" calculation doesn't seem to work
+ as expected here (and yet it works fine in qc_scan). No idea
+ why this case is the odd man out. Fortunately, Laird's original
+ working version gives me a good way to guess at working values.
+ -- bls */
+ val = q->width;
+ val2 = q->transfer_scale * 4;
+ } else {
+ val = q->width * q->bpp;
+ val2 = (((q->port_mode & QC_MODE_MASK) == QC_BIDIR) ? 24 : 8) *
+ q->transfer_scale;
+ }
+ val = DIV_ROUND_UP(val, val2);
+ qc_command(q, 0x13);
+ qc_command(q, val);
+
+ /* Setting top and left -- bls */
+ qc_command(q, 0xd);
+ qc_command(q, q->top);
+ qc_command(q, 0xf);
+ qc_command(q, q->left / 2);
+
+ qc_command(q, 0x19);
+ qc_command(q, q->contrast);
+ qc_command(q, 0x1f);
+ qc_command(q, q->whitebal);
+
+ /* Clear flag that we must update the grabbing parameters on the camera
+ before we grab the next frame */
+ q->status &= (~QC_PARAM_CHANGE);
+}
+
+/* Qc_readbytes reads some bytes from the QC and puts them in
+ the supplied buffer. It returns the number of bytes read,
+ or -1 on error. */
+
+static inline int qc_readbytes(struct qcam *q, char buffer[])
+{
+ int ret = 1;
+ unsigned int hi, lo;
+ unsigned int hi2, lo2;
+ static int state;
+
+ if (buffer == NULL) {
+ state = 0;
+ return 0;
+ }
+
+ switch (q->port_mode & QC_MODE_MASK) {
+ case QC_BIDIR: /* Bi-directional Port */
+ write_lpcontrol(q, 0x26);
+ lo = (qc_waithand2(q, 1) >> 1);
+ hi = (read_lpstatus(q) >> 3) & 0x1f;
+ write_lpcontrol(q, 0x2e);
+ lo2 = (qc_waithand2(q, 0) >> 1);
+ hi2 = (read_lpstatus(q) >> 3) & 0x1f;
+ switch (q->bpp) {
+ case 4:
+ buffer[0] = lo & 0xf;
+ buffer[1] = ((lo & 0x70) >> 4) | ((hi & 1) << 3);
+ buffer[2] = (hi & 0x1e) >> 1;
+ buffer[3] = lo2 & 0xf;
+ buffer[4] = ((lo2 & 0x70) >> 4) | ((hi2 & 1) << 3);
+ buffer[5] = (hi2 & 0x1e) >> 1;
+ ret = 6;
+ break;
+ case 6:
+ buffer[0] = lo & 0x3f;
+ buffer[1] = ((lo & 0x40) >> 6) | (hi << 1);
+ buffer[2] = lo2 & 0x3f;
+ buffer[3] = ((lo2 & 0x40) >> 6) | (hi2 << 1);
+ ret = 4;
+ break;
+ }
+ break;
+
+ case QC_UNIDIR: /* Unidirectional Port */
+ write_lpcontrol(q, 6);
+ lo = (qc_waithand(q, 1) & 0xf0) >> 4;
+ write_lpcontrol(q, 0xe);
+ hi = (qc_waithand(q, 0) & 0xf0) >> 4;
+
+ switch (q->bpp) {
+ case 4:
+ buffer[0] = lo;
+ buffer[1] = hi;
+ ret = 2;
+ break;
+ case 6:
+ switch (state) {
+ case 0:
+ buffer[0] = (lo << 2) | ((hi & 0xc) >> 2);
+ q->saved_bits = (hi & 3) << 4;
+ state = 1;
+ ret = 1;
+ break;
+ case 1:
+ buffer[0] = lo | q->saved_bits;
+ q->saved_bits = hi << 2;
+ state = 2;
+ ret = 1;
+ break;
+ case 2:
+ buffer[0] = ((lo & 0xc) >> 2) | q->saved_bits;
+ buffer[1] = ((lo & 3) << 4) | hi;
+ state = 0;
+ ret = 2;
+ break;
+ }
+ break;
+ }
+ break;
+ }
+ return ret;
+}
+
+/* requests a scan from the camera. It sends the correct instructions
+ * to the camera and then reads back the correct number of bytes. In
+ * previous versions of this routine the return structure contained
+ * the raw output from the camera, and there was a 'qc_convertscan'
+ * function that converted that to a useful format. In version 0.3 I
+ * rolled qc_convertscan into qc_scan and now I only return the
+ * converted scan. The format is just an one-dimensional array of
+ * characters, one for each pixel, with 0=black up to n=white, where
+ * n=2^(bit depth)-1. Ask me for more details if you don't understand
+ * this. */
+
+static long qc_capture(struct qcam *q, char __user *buf, unsigned long len)
+{
+ int i, j, k, yield;
+ int bytes;
+ int linestotrans, transperline;
+ int divisor;
+ int pixels_per_line;
+ int pixels_read = 0;
+ int got = 0;
+ char buffer[6];
+ int shift = 8 - q->bpp;
+ char invert;
+
+ if (q->mode == -1)
+ return -ENXIO;
+
+ qc_command(q, 0x7);
+ qc_command(q, q->mode);
+
+ if ((q->port_mode & QC_MODE_MASK) == QC_BIDIR) {
+ write_lpcontrol(q, 0x2e); /* turn port around */
+ write_lpcontrol(q, 0x26);
+ qc_waithand(q, 1);
+ write_lpcontrol(q, 0x2e);
+ qc_waithand(q, 0);
+ }
+
+ /* strange -- should be 15:63 below, but 4bpp is odd */
+ invert = (q->bpp == 4) ? 16 : 63;
+
+ linestotrans = q->height / q->transfer_scale;
+ pixels_per_line = q->width / q->transfer_scale;
+ transperline = q->width * q->bpp;
+ divisor = (((q->port_mode & QC_MODE_MASK) == QC_BIDIR) ? 24 : 8) *
+ q->transfer_scale;
+ transperline = DIV_ROUND_UP(transperline, divisor);
+
+ for (i = 0, yield = yieldlines; i < linestotrans; i++) {
+ for (pixels_read = j = 0; j < transperline; j++) {
+ bytes = qc_readbytes(q, buffer);
+ for (k = 0; k < bytes && (pixels_read + k) < pixels_per_line; k++) {
+ int o;
+ if (buffer[k] == 0 && invert == 16) {
+ /* 4bpp is odd (again) -- inverter is 16, not 15, but output
+ must be 0-15 -- bls */
+ buffer[k] = 16;
+ }
+ o = i * pixels_per_line + pixels_read + k;
+ if (o < len) {
+ u8 ch = invert - buffer[k];
+ got++;
+ put_user(ch << shift, buf + o);
+ }
+ }
+ pixels_read += bytes;
+ }
+ qc_readbytes(q, NULL); /* reset state machine */
+
+ /* Grabbing an entire frame from the quickcam is a lengthy
+ process. We don't (usually) want to busy-block the
+ processor for the entire frame. yieldlines is a module
+ parameter. If we yield every line, the minimum frame
+ time will be 240 / 200 = 1.2 seconds. The compile-time
+ default is to yield every 4 lines. */
+ if (i >= yield) {
+ msleep_interruptible(5);
+ yield = i + yieldlines;
+ }
+ }
+
+ if ((q->port_mode & QC_MODE_MASK) == QC_BIDIR) {
+ write_lpcontrol(q, 2);
+ write_lpcontrol(q, 6);
+ udelay(3);
+ write_lpcontrol(q, 0xe);
+ }
+ if (got < len)
+ return got;
+ return len;
+}
+
+/*
+ * Video4linux interfacing
+ */
+
+static int qcam_querycap(struct file *file, void *priv,
+ struct v4l2_capability *vcap)
+{
+ struct qcam *qcam = video_drvdata(file);
+
+ strlcpy(vcap->driver, qcam->v4l2_dev.name, sizeof(vcap->driver));
+ strlcpy(vcap->card, "Connectix B&W Quickcam", sizeof(vcap->card));
+ strlcpy(vcap->bus_info, qcam->pport->name, sizeof(vcap->bus_info));
+ vcap->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_READWRITE;
+ vcap->capabilities = vcap->device_caps | V4L2_CAP_DEVICE_CAPS;
+ return 0;
+}
+
+static int qcam_enum_input(struct file *file, void *fh, struct v4l2_input *vin)
+{
+ if (vin->index > 0)
+ return -EINVAL;
+ strlcpy(vin->name, "Camera", sizeof(vin->name));
+ vin->type = V4L2_INPUT_TYPE_CAMERA;
+ vin->audioset = 0;
+ vin->tuner = 0;
+ vin->std = 0;
+ vin->status = 0;
+ return 0;
+}
+
+static int qcam_g_input(struct file *file, void *fh, unsigned int *inp)
+{
+ *inp = 0;
+ return 0;
+}
+
+static int qcam_s_input(struct file *file, void *fh, unsigned int inp)
+{
+ return (inp > 0) ? -EINVAL : 0;
+}
+
+static int qcam_g_fmt_vid_cap(struct file *file, void *fh, struct v4l2_format *fmt)
+{
+ struct qcam *qcam = video_drvdata(file);
+ struct v4l2_pix_format *pix = &fmt->fmt.pix;
+
+ pix->width = qcam->width / qcam->transfer_scale;
+ pix->height = qcam->height / qcam->transfer_scale;
+ pix->pixelformat = (qcam->bpp == 4) ? V4L2_PIX_FMT_Y4 : V4L2_PIX_FMT_Y6;
+ pix->field = V4L2_FIELD_NONE;
+ pix->bytesperline = pix->width;
+ pix->sizeimage = pix->width * pix->height;
+ /* Just a guess */
+ pix->colorspace = V4L2_COLORSPACE_SRGB;
+ return 0;
+}
+
+static int qcam_try_fmt_vid_cap(struct file *file, void *fh, struct v4l2_format *fmt)
+{
+ struct v4l2_pix_format *pix = &fmt->fmt.pix;
+
+ if (pix->height <= 60 || pix->width <= 80) {
+ pix->height = 60;
+ pix->width = 80;
+ } else if (pix->height <= 120 || pix->width <= 160) {
+ pix->height = 120;
+ pix->width = 160;
+ } else {
+ pix->height = 240;
+ pix->width = 320;
+ }
+ if (pix->pixelformat != V4L2_PIX_FMT_Y4 &&
+ pix->pixelformat != V4L2_PIX_FMT_Y6)
+ pix->pixelformat = V4L2_PIX_FMT_Y4;
+ pix->field = V4L2_FIELD_NONE;
+ pix->bytesperline = pix->width;
+ pix->sizeimage = pix->width * pix->height;
+ /* Just a guess */
+ pix->colorspace = V4L2_COLORSPACE_SRGB;
+ return 0;
+}
+
+static int qcam_s_fmt_vid_cap(struct file *file, void *fh, struct v4l2_format *fmt)
+{
+ struct qcam *qcam = video_drvdata(file);
+ struct v4l2_pix_format *pix = &fmt->fmt.pix;
+ int ret = qcam_try_fmt_vid_cap(file, fh, fmt);
+
+ if (ret)
+ return ret;
+ qcam->width = 320;
+ qcam->height = 240;
+ if (pix->height == 60)
+ qcam->transfer_scale = 4;
+ else if (pix->height == 120)
+ qcam->transfer_scale = 2;
+ else
+ qcam->transfer_scale = 1;
+ if (pix->pixelformat == V4L2_PIX_FMT_Y6)
+ qcam->bpp = 6;
+ else
+ qcam->bpp = 4;
+
+ mutex_lock(&qcam->lock);
+ qc_setscanmode(qcam);
+ /* We must update the camera before we grab. We could
+ just have changed the grab size */
+ qcam->status |= QC_PARAM_CHANGE;
+ mutex_unlock(&qcam->lock);
+ return 0;
+}
+
+static int qcam_enum_fmt_vid_cap(struct file *file, void *fh, struct v4l2_fmtdesc *fmt)
+{
+ static struct v4l2_fmtdesc formats[] = {
+ { 0, 0, 0,
+ "4-Bit Monochrome", V4L2_PIX_FMT_Y4,
+ { 0, 0, 0, 0 }
+ },
+ { 1, 0, 0,
+ "6-Bit Monochrome", V4L2_PIX_FMT_Y6,
+ { 0, 0, 0, 0 }
+ },
+ };
+ enum v4l2_buf_type type = fmt->type;
+
+ if (fmt->index > 1)
+ return -EINVAL;
+
+ *fmt = formats[fmt->index];
+ fmt->type = type;
+ return 0;
+}
+
+static int qcam_enum_framesizes(struct file *file, void *fh,
+ struct v4l2_frmsizeenum *fsize)
+{
+ static const struct v4l2_frmsize_discrete sizes[] = {
+ { 80, 60 },
+ { 160, 120 },
+ { 320, 240 },
+ };
+
+ if (fsize->index > 2)
+ return -EINVAL;
+ if (fsize->pixel_format != V4L2_PIX_FMT_Y4 &&
+ fsize->pixel_format != V4L2_PIX_FMT_Y6)
+ return -EINVAL;
+ fsize->type = V4L2_FRMSIZE_TYPE_DISCRETE;
+ fsize->discrete = sizes[fsize->index];
+ return 0;
+}
+
+static ssize_t qcam_read(struct file *file, char __user *buf,
+ size_t count, loff_t *ppos)
+{
+ struct qcam *qcam = video_drvdata(file);
+ int len;
+ parport_claim_or_block(qcam->pdev);
+
+ mutex_lock(&qcam->lock);
+
+ qc_reset(qcam);
+
+ /* Update the camera parameters if we need to */
+ if (qcam->status & QC_PARAM_CHANGE)
+ qc_set(qcam);
+
+ len = qc_capture(qcam, buf, count);
+
+ mutex_unlock(&qcam->lock);
+
+ parport_release(qcam->pdev);
+ return len;
+}
+
+static unsigned int qcam_poll(struct file *filp, poll_table *wait)
+{
+ return v4l2_ctrl_poll(filp, wait) | POLLIN | POLLRDNORM;
+}
+
+static int qcam_s_ctrl(struct v4l2_ctrl *ctrl)
+{
+ struct qcam *qcam =
+ container_of(ctrl->handler, struct qcam, hdl);
+ int ret = 0;
+
+ mutex_lock(&qcam->lock);
+ switch (ctrl->id) {
+ case V4L2_CID_BRIGHTNESS:
+ qcam->brightness = ctrl->val;
+ break;
+ case V4L2_CID_CONTRAST:
+ qcam->contrast = ctrl->val;
+ break;
+ case V4L2_CID_GAMMA:
+ qcam->whitebal = ctrl->val;
+ break;
+ default:
+ ret = -EINVAL;
+ break;
+ }
+ if (ret == 0) {
+ qc_setscanmode(qcam);
+ qcam->status |= QC_PARAM_CHANGE;
+ }
+ mutex_unlock(&qcam->lock);
+ return ret;
+}
+
+static const struct v4l2_file_operations qcam_fops = {
+ .owner = THIS_MODULE,
+ .open = v4l2_fh_open,
+ .release = v4l2_fh_release,
+ .poll = qcam_poll,
+ .unlocked_ioctl = video_ioctl2,
+ .read = qcam_read,
+};
+
+static const struct v4l2_ioctl_ops qcam_ioctl_ops = {
+ .vidioc_querycap = qcam_querycap,
+ .vidioc_g_input = qcam_g_input,
+ .vidioc_s_input = qcam_s_input,
+ .vidioc_enum_input = qcam_enum_input,
+ .vidioc_enum_fmt_vid_cap = qcam_enum_fmt_vid_cap,
+ .vidioc_enum_framesizes = qcam_enum_framesizes,
+ .vidioc_g_fmt_vid_cap = qcam_g_fmt_vid_cap,
+ .vidioc_s_fmt_vid_cap = qcam_s_fmt_vid_cap,
+ .vidioc_try_fmt_vid_cap = qcam_try_fmt_vid_cap,
+ .vidioc_log_status = v4l2_ctrl_log_status,
+ .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
+ .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
+};
+
+static const struct v4l2_ctrl_ops qcam_ctrl_ops = {
+ .s_ctrl = qcam_s_ctrl,
+};
+
+/* Initialize the QuickCam driver control structure. This is where
+ * defaults are set for people who don't have a config file.*/
+
+static struct qcam *qcam_init(struct parport *port)
+{
+ struct qcam *qcam;
+ struct v4l2_device *v4l2_dev;
+
+ qcam = kzalloc(sizeof(struct qcam), GFP_KERNEL);
+ if (qcam == NULL)
+ return NULL;
+
+ v4l2_dev = &qcam->v4l2_dev;
+ snprintf(v4l2_dev->name, sizeof(v4l2_dev->name), "bw-qcam%d", num_cams);
+
+ if (v4l2_device_register(port->dev, v4l2_dev) < 0) {
+ v4l2_err(v4l2_dev, "Could not register v4l2_device\n");
+ kfree(qcam);
+ return NULL;
+ }
+
+ v4l2_ctrl_handler_init(&qcam->hdl, 3);
+ v4l2_ctrl_new_std(&qcam->hdl, &qcam_ctrl_ops,
+ V4L2_CID_BRIGHTNESS, 0, 255, 1, 180);
+ v4l2_ctrl_new_std(&qcam->hdl, &qcam_ctrl_ops,
+ V4L2_CID_CONTRAST, 0, 255, 1, 192);
+ v4l2_ctrl_new_std(&qcam->hdl, &qcam_ctrl_ops,
+ V4L2_CID_GAMMA, 0, 255, 1, 105);
+ if (qcam->hdl.error) {
+ v4l2_err(v4l2_dev, "couldn't register controls\n");
+ v4l2_ctrl_handler_free(&qcam->hdl);
+ kfree(qcam);
+ return NULL;
+ }
+ qcam->pport = port;
+ qcam->pdev = parport_register_device(port, v4l2_dev->name, NULL, NULL,
+ NULL, 0, NULL);
+ if (qcam->pdev == NULL) {
+ v4l2_err(v4l2_dev, "couldn't register for %s.\n", port->name);
+ v4l2_ctrl_handler_free(&qcam->hdl);
+ kfree(qcam);
+ return NULL;
+ }
+
+ strlcpy(qcam->vdev.name, "Connectix QuickCam", sizeof(qcam->vdev.name));
+ qcam->vdev.v4l2_dev = v4l2_dev;
+ qcam->vdev.ctrl_handler = &qcam->hdl;
+ qcam->vdev.fops = &qcam_fops;
+ qcam->vdev.ioctl_ops = &qcam_ioctl_ops;
+ set_bit(V4L2_FL_USE_FH_PRIO, &qcam->vdev.flags);
+ qcam->vdev.release = video_device_release_empty;
+ video_set_drvdata(&qcam->vdev, qcam);
+
+ mutex_init(&qcam->lock);
+
+ qcam->port_mode = (QC_ANY | QC_NOTSET);
+ qcam->width = 320;
+ qcam->height = 240;
+ qcam->bpp = 4;
+ qcam->transfer_scale = 2;
+ qcam->contrast = 192;
+ qcam->brightness = 180;
+ qcam->whitebal = 105;
+ qcam->top = 1;
+ qcam->left = 14;
+ qcam->mode = -1;
+ qcam->status = QC_PARAM_CHANGE;
+ return qcam;
+}
+
+static int qc_calibrate(struct qcam *q)
+{
+ /*
+ * Bugfix by Hanno Mueller hmueller@kabel.de, Mai 21 96
+ * The white balance is an individual value for each
+ * quickcam.
+ */
+
+ int value;
+ int count = 0;
+
+ qc_command(q, 27); /* AutoAdjustOffset */
+ qc_command(q, 0); /* Dummy Parameter, ignored by the camera */
+
+ /* GetOffset (33) will read 255 until autocalibration */
+ /* is finished. After that, a value of 1-254 will be */
+ /* returned. */
+
+ do {
+ qc_command(q, 33);
+ value = qc_readparam(q);
+ mdelay(1);
+ schedule();
+ count++;
+ } while (value == 0xff && count < 2048);
+
+ q->whitebal = value;
+ return value;
+}
+
+static int init_bwqcam(struct parport *port)
+{
+ struct qcam *qcam;
+
+ if (num_cams == MAX_CAMS) {
+ printk(KERN_ERR "Too many Quickcams (max %d)\n", MAX_CAMS);
+ return -ENOSPC;
+ }
+
+ qcam = qcam_init(port);
+ if (qcam == NULL)
+ return -ENODEV;
+
+ parport_claim_or_block(qcam->pdev);
+
+ qc_reset(qcam);
+
+ if (qc_detect(qcam) == 0) {
+ parport_release(qcam->pdev);
+ parport_unregister_device(qcam->pdev);
+ kfree(qcam);
+ return -ENODEV;
+ }
+ qc_calibrate(qcam);
+ v4l2_ctrl_handler_setup(&qcam->hdl);
+
+ parport_release(qcam->pdev);
+
+ v4l2_info(&qcam->v4l2_dev, "Connectix Quickcam on %s\n", qcam->pport->name);
+
+ if (video_register_device(&qcam->vdev, VFL_TYPE_GRABBER, video_nr) < 0) {
+ parport_unregister_device(qcam->pdev);
+ kfree(qcam);
+ return -ENODEV;
+ }
+
+ qcams[num_cams++] = qcam;
+
+ return 0;
+}
+
+static void close_bwqcam(struct qcam *qcam)
+{
+ video_unregister_device(&qcam->vdev);
+ v4l2_ctrl_handler_free(&qcam->hdl);
+ parport_unregister_device(qcam->pdev);
+ kfree(qcam);
+}
+
+/* The parport parameter controls which parports will be scanned.
+ * Scanning all parports causes some printers to print a garbage page.
+ * -- March 14, 1999 Billy Donahue <billy@escape.com> */
+#ifdef MODULE
+static char *parport[MAX_CAMS] = { NULL, };
+module_param_array(parport, charp, NULL, 0);
+#endif
+
+static int accept_bwqcam(struct parport *port)
+{
+#ifdef MODULE
+ int n;
+
+ if (parport[0] && strncmp(parport[0], "auto", 4) != 0) {
+ /* user gave parport parameters */
+ for (n = 0; n < MAX_CAMS && parport[n]; n++) {
+ char *ep;
+ unsigned long r;
+ r = simple_strtoul(parport[n], &ep, 0);
+ if (ep == parport[n]) {
+ printk(KERN_ERR
+ "bw-qcam: bad port specifier \"%s\"\n",
+ parport[n]);
+ continue;
+ }
+ if (r == port->number)
+ return 1;
+ }
+ return 0;
+ }
+#endif
+ return 1;
+}
+
+static void bwqcam_attach(struct parport *port)
+{
+ if (accept_bwqcam(port))
+ init_bwqcam(port);
+}
+
+static void bwqcam_detach(struct parport *port)
+{
+ int i;
+ for (i = 0; i < num_cams; i++) {
+ struct qcam *qcam = qcams[i];
+ if (qcam && qcam->pdev->port == port) {
+ qcams[i] = NULL;
+ close_bwqcam(qcam);
+ }
+ }
+}
+
+static struct parport_driver bwqcam_driver = {
+ .name = "bw-qcam",
+ .attach = bwqcam_attach,
+ .detach = bwqcam_detach,
+};
+
+static void __exit exit_bw_qcams(void)
+{
+ parport_unregister_driver(&bwqcam_driver);
+}
+
+static int __init init_bw_qcams(void)
+{
+#ifdef MODULE
+ /* Do some sanity checks on the module parameters. */
+ if (maxpoll > 5000) {
+ printk(KERN_INFO "Connectix Quickcam max-poll was above 5000. Using 5000.\n");
+ maxpoll = 5000;
+ }
+
+ if (yieldlines < 1) {
+ printk(KERN_INFO "Connectix Quickcam yieldlines was less than 1. Using 1.\n");
+ yieldlines = 1;
+ }
+#endif
+ return parport_register_driver(&bwqcam_driver);
+}
+
+module_init(init_bw_qcams);
+module_exit(exit_bw_qcams);
+
+MODULE_LICENSE("GPL");
+MODULE_VERSION("0.0.3");
diff --git a/drivers/media/parport/c-qcam.c b/drivers/media/parport/c-qcam.c
new file mode 100644
index 00000000000..ec51e1f12e8
--- /dev/null
+++ b/drivers/media/parport/c-qcam.c
@@ -0,0 +1,883 @@
+/*
+ * Video4Linux Colour QuickCam driver
+ * Copyright 1997-2000 Philip Blundell <philb@gnu.org>
+ *
+ * Module parameters:
+ *
+ * parport=auto -- probe all parports (default)
+ * parport=0 -- parport0 becomes qcam1
+ * parport=2,0,1 -- parports 2,0,1 are tried in that order
+ *
+ * probe=0 -- do no probing, assume camera is present
+ * probe=1 -- use IEEE-1284 autoprobe data only (default)
+ * probe=2 -- probe aggressively for cameras
+ *
+ * force_rgb=1 -- force data format to RGB (default is BGR)
+ *
+ * The parport parameter controls which parports will be scanned.
+ * Scanning all parports causes some printers to print a garbage page.
+ * -- March 14, 1999 Billy Donahue <billy@escape.com>
+ *
+ * Fixed data format to BGR, added force_rgb parameter. Added missing
+ * parport_unregister_driver() on module removal.
+ * -- May 28, 2000 Claudio Matsuoka <claudio@conectiva.com>
+ */
+
+#include <linux/module.h>
+#include <linux/delay.h>
+#include <linux/errno.h>
+#include <linux/fs.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/mm.h>
+#include <linux/parport.h>
+#include <linux/sched.h>
+#include <linux/mutex.h>
+#include <linux/jiffies.h>
+#include <linux/videodev2.h>
+#include <asm/uaccess.h>
+#include <media/v4l2-device.h>
+#include <media/v4l2-common.h>
+#include <media/v4l2-ioctl.h>
+#include <media/v4l2-fh.h>
+#include <media/v4l2-ctrls.h>
+#include <media/v4l2-event.h>
+
+struct qcam {
+ struct v4l2_device v4l2_dev;
+ struct video_device vdev;
+ struct v4l2_ctrl_handler hdl;
+ struct pardevice *pdev;
+ struct parport *pport;
+ int width, height;
+ int ccd_width, ccd_height;
+ int mode;
+ int contrast, brightness, whitebal;
+ int top, left;
+ unsigned int bidirectional;
+ struct mutex lock;
+};
+
+/* cameras maximum */
+#define MAX_CAMS 4
+
+/* The three possible QuickCam modes */
+#define QC_MILLIONS 0x18
+#define QC_BILLIONS 0x10
+#define QC_THOUSANDS 0x08 /* with VIDEC compression (not supported) */
+
+/* The three possible decimations */
+#define QC_DECIMATION_1 0
+#define QC_DECIMATION_2 2
+#define QC_DECIMATION_4 4
+
+#define BANNER "Colour QuickCam for Video4Linux v0.06"
+
+static int parport[MAX_CAMS] = { [1 ... MAX_CAMS-1] = -1 };
+static int probe = 2;
+static bool force_rgb;
+static int video_nr = -1;
+
+/* FIXME: parport=auto would never have worked, surely? --RR */
+MODULE_PARM_DESC(parport, "parport=<auto|n[,n]...> for port detection method\n"
+ "probe=<0|1|2> for camera detection method\n"
+ "force_rgb=<0|1> for RGB data format (default BGR)");
+module_param_array(parport, int, NULL, 0);
+module_param(probe, int, 0);
+module_param(force_rgb, bool, 0);
+module_param(video_nr, int, 0);
+
+static struct qcam *qcams[MAX_CAMS];
+static unsigned int num_cams;
+
+static inline void qcam_set_ack(struct qcam *qcam, unsigned int i)
+{
+ /* note: the QC specs refer to the PCAck pin by voltage, not
+ software level. PC ports have builtin inverters. */
+ parport_frob_control(qcam->pport, 8, i ? 8 : 0);
+}
+
+static inline unsigned int qcam_ready1(struct qcam *qcam)
+{
+ return (parport_read_status(qcam->pport) & 0x8) ? 1 : 0;
+}
+
+static inline unsigned int qcam_ready2(struct qcam *qcam)
+{
+ return (parport_read_data(qcam->pport) & 0x1) ? 1 : 0;
+}
+
+static unsigned int qcam_await_ready1(struct qcam *qcam, int value)
+{
+ struct v4l2_device *v4l2_dev = &qcam->v4l2_dev;
+ unsigned long oldjiffies = jiffies;
+ unsigned int i;
+
+ for (oldjiffies = jiffies;
+ time_before(jiffies, oldjiffies + msecs_to_jiffies(40));)
+ if (qcam_ready1(qcam) == value)
+ return 0;
+
+ /* If the camera didn't respond within 1/25 second, poll slowly
+ for a while. */
+ for (i = 0; i < 50; i++) {
+ if (qcam_ready1(qcam) == value)
+ return 0;
+ msleep_interruptible(100);
+ }
+
+ /* Probably somebody pulled the plug out. Not much we can do. */
+ v4l2_err(v4l2_dev, "ready1 timeout (%d) %x %x\n", value,
+ parport_read_status(qcam->pport),
+ parport_read_control(qcam->pport));
+ return 1;
+}
+
+static unsigned int qcam_await_ready2(struct qcam *qcam, int value)
+{
+ struct v4l2_device *v4l2_dev = &qcam->v4l2_dev;
+ unsigned long oldjiffies = jiffies;
+ unsigned int i;
+
+ for (oldjiffies = jiffies;
+ time_before(jiffies, oldjiffies + msecs_to_jiffies(40));)
+ if (qcam_ready2(qcam) == value)
+ return 0;
+
+ /* If the camera didn't respond within 1/25 second, poll slowly
+ for a while. */
+ for (i = 0; i < 50; i++) {
+ if (qcam_ready2(qcam) == value)
+ return 0;
+ msleep_interruptible(100);
+ }
+
+ /* Probably somebody pulled the plug out. Not much we can do. */
+ v4l2_err(v4l2_dev, "ready2 timeout (%d) %x %x %x\n", value,
+ parport_read_status(qcam->pport),
+ parport_read_control(qcam->pport),
+ parport_read_data(qcam->pport));
+ return 1;
+}
+
+static int qcam_read_data(struct qcam *qcam)
+{
+ unsigned int idata;
+
+ qcam_set_ack(qcam, 0);
+ if (qcam_await_ready1(qcam, 1))
+ return -1;
+ idata = parport_read_status(qcam->pport) & 0xf0;
+ qcam_set_ack(qcam, 1);
+ if (qcam_await_ready1(qcam, 0))
+ return -1;
+ idata |= parport_read_status(qcam->pport) >> 4;
+ return idata;
+}
+
+static int qcam_write_data(struct qcam *qcam, unsigned int data)
+{
+ struct v4l2_device *v4l2_dev = &qcam->v4l2_dev;
+ unsigned int idata;
+
+ parport_write_data(qcam->pport, data);
+ idata = qcam_read_data(qcam);
+ if (data != idata) {
+ v4l2_warn(v4l2_dev, "sent %x but received %x\n", data,
+ idata);
+ return 1;
+ }
+ return 0;
+}
+
+static inline int qcam_set(struct qcam *qcam, unsigned int cmd, unsigned int data)
+{
+ if (qcam_write_data(qcam, cmd))
+ return -1;
+ if (qcam_write_data(qcam, data))
+ return -1;
+ return 0;
+}
+
+static inline int qcam_get(struct qcam *qcam, unsigned int cmd)
+{
+ if (qcam_write_data(qcam, cmd))
+ return -1;
+ return qcam_read_data(qcam);
+}
+
+static int qc_detect(struct qcam *qcam)
+{
+ unsigned int stat, ostat, i, count = 0;
+
+ /* The probe routine below is not very reliable. The IEEE-1284
+ probe takes precedence. */
+ /* XXX Currently parport provides no way to distinguish between
+ "the IEEE probe was not done" and "the probe was done, but
+ no device was found". Fix this one day. */
+ if (qcam->pport->probe_info[0].class == PARPORT_CLASS_MEDIA
+ && qcam->pport->probe_info[0].model
+ && !strcmp(qcam->pdev->port->probe_info[0].model,
+ "Color QuickCam 2.0")) {
+ printk(KERN_DEBUG "QuickCam: Found by IEEE1284 probe.\n");
+ return 1;
+ }
+
+ if (probe < 2)
+ return 0;
+
+ parport_write_control(qcam->pport, 0xc);
+
+ /* look for a heartbeat */
+ ostat = stat = parport_read_status(qcam->pport);
+ for (i = 0; i < 250; i++) {
+ mdelay(1);
+ stat = parport_read_status(qcam->pport);
+ if (ostat != stat) {
+ if (++count >= 3)
+ return 1;
+ ostat = stat;
+ }
+ }
+
+ /* Reset the camera and try again */
+ parport_write_control(qcam->pport, 0xc);
+ parport_write_control(qcam->pport, 0x8);
+ mdelay(1);
+ parport_write_control(qcam->pport, 0xc);
+ mdelay(1);
+ count = 0;
+
+ ostat = stat = parport_read_status(qcam->pport);
+ for (i = 0; i < 250; i++) {
+ mdelay(1);
+ stat = parport_read_status(qcam->pport);
+ if (ostat != stat) {
+ if (++count >= 3)
+ return 1;
+ ostat = stat;
+ }
+ }
+
+ /* no (or flatline) camera, give up */
+ return 0;
+}
+
+static void qc_reset(struct qcam *qcam)
+{
+ parport_write_control(qcam->pport, 0xc);
+ parport_write_control(qcam->pport, 0x8);
+ mdelay(1);
+ parport_write_control(qcam->pport, 0xc);
+ mdelay(1);
+}
+
+/* Reset the QuickCam and program for brightness, contrast,
+ * white-balance, and resolution. */
+
+static void qc_setup(struct qcam *qcam)
+{
+ qc_reset(qcam);
+
+ /* Set the brightness. */
+ qcam_set(qcam, 11, qcam->brightness);
+
+ /* Set the height and width. These refer to the actual
+ CCD area *before* applying the selected decimation. */
+ qcam_set(qcam, 17, qcam->ccd_height);
+ qcam_set(qcam, 19, qcam->ccd_width / 2);
+
+ /* Set top and left. */
+ qcam_set(qcam, 0xd, qcam->top);
+ qcam_set(qcam, 0xf, qcam->left);
+
+ /* Set contrast and white balance. */
+ qcam_set(qcam, 0x19, qcam->contrast);
+ qcam_set(qcam, 0x1f, qcam->whitebal);
+
+ /* Set the speed. */
+ qcam_set(qcam, 45, 2);
+}
+
+/* Read some bytes from the camera and put them in the buffer.
+ nbytes should be a multiple of 3, because bidirectional mode gives
+ us three bytes at a time. */
+
+static unsigned int qcam_read_bytes(struct qcam *qcam, unsigned char *buf, unsigned int nbytes)
+{
+ unsigned int bytes = 0;
+
+ qcam_set_ack(qcam, 0);
+ if (qcam->bidirectional) {
+ /* It's a bidirectional port */
+ while (bytes < nbytes) {
+ unsigned int lo1, hi1, lo2, hi2;
+ unsigned char r, g, b;
+
+ if (qcam_await_ready2(qcam, 1))
+ return bytes;
+ lo1 = parport_read_data(qcam->pport) >> 1;
+ hi1 = ((parport_read_status(qcam->pport) >> 3) & 0x1f) ^ 0x10;
+ qcam_set_ack(qcam, 1);
+ if (qcam_await_ready2(qcam, 0))
+ return bytes;
+ lo2 = parport_read_data(qcam->pport) >> 1;
+ hi2 = ((parport_read_status(qcam->pport) >> 3) & 0x1f) ^ 0x10;
+ qcam_set_ack(qcam, 0);
+ r = lo1 | ((hi1 & 1) << 7);
+ g = ((hi1 & 0x1e) << 3) | ((hi2 & 0x1e) >> 1);
+ b = lo2 | ((hi2 & 1) << 7);
+ if (force_rgb) {
+ buf[bytes++] = r;
+ buf[bytes++] = g;
+ buf[bytes++] = b;
+ } else {
+ buf[bytes++] = b;
+ buf[bytes++] = g;
+ buf[bytes++] = r;
+ }
+ }
+ } else {
+ /* It's a unidirectional port */
+ int i = 0, n = bytes;
+ unsigned char rgb[3];
+
+ while (bytes < nbytes) {
+ unsigned int hi, lo;
+
+ if (qcam_await_ready1(qcam, 1))
+ return bytes;
+ hi = (parport_read_status(qcam->pport) & 0xf0);
+ qcam_set_ack(qcam, 1);
+ if (qcam_await_ready1(qcam, 0))
+ return bytes;
+ lo = (parport_read_status(qcam->pport) & 0xf0);
+ qcam_set_ack(qcam, 0);
+ /* flip some bits */
+ rgb[(i = bytes++ % 3)] = (hi | (lo >> 4)) ^ 0x88;
+ if (i >= 2) {
+get_fragment:
+ if (force_rgb) {
+ buf[n++] = rgb[0];
+ buf[n++] = rgb[1];
+ buf[n++] = rgb[2];
+ } else {
+ buf[n++] = rgb[2];
+ buf[n++] = rgb[1];
+ buf[n++] = rgb[0];
+ }
+ }
+ }
+ if (i) {
+ i = 0;
+ goto get_fragment;
+ }
+ }
+ return bytes;
+}
+
+#define BUFSZ 150
+
+static long qc_capture(struct qcam *qcam, char __user *buf, unsigned long len)
+{
+ struct v4l2_device *v4l2_dev = &qcam->v4l2_dev;
+ unsigned lines, pixelsperline;
+ unsigned int is_bi_dir = qcam->bidirectional;
+ size_t wantlen, outptr = 0;
+ char tmpbuf[BUFSZ];
+
+ if (!access_ok(VERIFY_WRITE, buf, len))
+ return -EFAULT;
+
+ /* Wait for camera to become ready */
+ for (;;) {
+ int i = qcam_get(qcam, 41);
+
+ if (i == -1) {
+ qc_setup(qcam);
+ return -EIO;
+ }
+ if ((i & 0x80) == 0)
+ break;
+ schedule();
+ }
+
+ if (qcam_set(qcam, 7, (qcam->mode | (is_bi_dir ? 1 : 0)) + 1))
+ return -EIO;
+
+ lines = qcam->height;
+ pixelsperline = qcam->width;
+
+ if (is_bi_dir) {
+ /* Turn the port around */
+ parport_data_reverse(qcam->pport);
+ mdelay(3);
+ qcam_set_ack(qcam, 0);
+ if (qcam_await_ready1(qcam, 1)) {
+ qc_setup(qcam);
+ return -EIO;
+ }
+ qcam_set_ack(qcam, 1);
+ if (qcam_await_ready1(qcam, 0)) {
+ qc_setup(qcam);
+ return -EIO;
+ }
+ }
+
+ wantlen = lines * pixelsperline * 24 / 8;
+
+ while (wantlen) {
+ size_t t, s;
+
+ s = (wantlen > BUFSZ) ? BUFSZ : wantlen;
+ t = qcam_read_bytes(qcam, tmpbuf, s);
+ if (outptr < len) {
+ size_t sz = len - outptr;
+
+ if (sz > t)
+ sz = t;
+ if (__copy_to_user(buf + outptr, tmpbuf, sz))
+ break;
+ outptr += sz;
+ }
+ wantlen -= t;
+ if (t < s)
+ break;
+ cond_resched();
+ }
+
+ len = outptr;
+
+ if (wantlen) {
+ v4l2_err(v4l2_dev, "short read.\n");
+ if (is_bi_dir)
+ parport_data_forward(qcam->pport);
+ qc_setup(qcam);
+ return len;
+ }
+
+ if (is_bi_dir) {
+ int l;
+
+ do {
+ l = qcam_read_bytes(qcam, tmpbuf, 3);
+ cond_resched();
+ } while (l && (tmpbuf[0] == 0x7e || tmpbuf[1] == 0x7e || tmpbuf[2] == 0x7e));
+ if (force_rgb) {
+ if (tmpbuf[0] != 0xe || tmpbuf[1] != 0x0 || tmpbuf[2] != 0xf)
+ v4l2_err(v4l2_dev, "bad EOF\n");
+ } else {
+ if (tmpbuf[0] != 0xf || tmpbuf[1] != 0x0 || tmpbuf[2] != 0xe)
+ v4l2_err(v4l2_dev, "bad EOF\n");
+ }
+ qcam_set_ack(qcam, 0);
+ if (qcam_await_ready1(qcam, 1)) {
+ v4l2_err(v4l2_dev, "no ack after EOF\n");
+ parport_data_forward(qcam->pport);
+ qc_setup(qcam);
+ return len;
+ }
+ parport_data_forward(qcam->pport);
+ mdelay(3);
+ qcam_set_ack(qcam, 1);
+ if (qcam_await_ready1(qcam, 0)) {
+ v4l2_err(v4l2_dev, "no ack to port turnaround\n");
+ qc_setup(qcam);
+ return len;
+ }
+ } else {
+ int l;
+
+ do {
+ l = qcam_read_bytes(qcam, tmpbuf, 1);
+ cond_resched();
+ } while (l && tmpbuf[0] == 0x7e);
+ l = qcam_read_bytes(qcam, tmpbuf + 1, 2);
+ if (force_rgb) {
+ if (tmpbuf[0] != 0xe || tmpbuf[1] != 0x0 || tmpbuf[2] != 0xf)
+ v4l2_err(v4l2_dev, "bad EOF\n");
+ } else {
+ if (tmpbuf[0] != 0xf || tmpbuf[1] != 0x0 || tmpbuf[2] != 0xe)
+ v4l2_err(v4l2_dev, "bad EOF\n");
+ }
+ }
+
+ qcam_write_data(qcam, 0);
+ return len;
+}
+
+/*
+ * Video4linux interfacing
+ */
+
+static int qcam_querycap(struct file *file, void *priv,
+ struct v4l2_capability *vcap)
+{
+ struct qcam *qcam = video_drvdata(file);
+
+ strlcpy(vcap->driver, qcam->v4l2_dev.name, sizeof(vcap->driver));
+ strlcpy(vcap->card, "Color Quickcam", sizeof(vcap->card));
+ strlcpy(vcap->bus_info, "parport", sizeof(vcap->bus_info));
+ vcap->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_READWRITE;
+ vcap->capabilities = vcap->device_caps | V4L2_CAP_DEVICE_CAPS;
+ return 0;
+}
+
+static int qcam_enum_input(struct file *file, void *fh, struct v4l2_input *vin)
+{
+ if (vin->index > 0)
+ return -EINVAL;
+ strlcpy(vin->name, "Camera", sizeof(vin->name));
+ vin->type = V4L2_INPUT_TYPE_CAMERA;
+ vin->audioset = 0;
+ vin->tuner = 0;
+ vin->std = 0;
+ vin->status = 0;
+ return 0;
+}
+
+static int qcam_g_input(struct file *file, void *fh, unsigned int *inp)
+{
+ *inp = 0;
+ return 0;
+}
+
+static int qcam_s_input(struct file *file, void *fh, unsigned int inp)
+{
+ return (inp > 0) ? -EINVAL : 0;
+}
+
+static int qcam_g_fmt_vid_cap(struct file *file, void *fh, struct v4l2_format *fmt)
+{
+ struct qcam *qcam = video_drvdata(file);
+ struct v4l2_pix_format *pix = &fmt->fmt.pix;
+
+ pix->width = qcam->width;
+ pix->height = qcam->height;
+ pix->pixelformat = V4L2_PIX_FMT_RGB24;
+ pix->field = V4L2_FIELD_NONE;
+ pix->bytesperline = 3 * qcam->width;
+ pix->sizeimage = 3 * qcam->width * qcam->height;
+ /* Just a guess */
+ pix->colorspace = V4L2_COLORSPACE_SRGB;
+ return 0;
+}
+
+static int qcam_try_fmt_vid_cap(struct file *file, void *fh, struct v4l2_format *fmt)
+{
+ struct v4l2_pix_format *pix = &fmt->fmt.pix;
+
+ if (pix->height < 60 || pix->width < 80) {
+ pix->height = 60;
+ pix->width = 80;
+ } else if (pix->height < 120 || pix->width < 160) {
+ pix->height = 120;
+ pix->width = 160;
+ } else {
+ pix->height = 240;
+ pix->width = 320;
+ }
+ pix->pixelformat = V4L2_PIX_FMT_RGB24;
+ pix->field = V4L2_FIELD_NONE;
+ pix->bytesperline = 3 * pix->width;
+ pix->sizeimage = 3 * pix->width * pix->height;
+ /* Just a guess */
+ pix->colorspace = V4L2_COLORSPACE_SRGB;
+ return 0;
+}
+
+static int qcam_s_fmt_vid_cap(struct file *file, void *fh, struct v4l2_format *fmt)
+{
+ struct qcam *qcam = video_drvdata(file);
+ struct v4l2_pix_format *pix = &fmt->fmt.pix;
+ int ret = qcam_try_fmt_vid_cap(file, fh, fmt);
+
+ if (ret)
+ return ret;
+ switch (pix->height) {
+ case 60:
+ qcam->mode = QC_DECIMATION_4;
+ break;
+ case 120:
+ qcam->mode = QC_DECIMATION_2;
+ break;
+ default:
+ qcam->mode = QC_DECIMATION_1;
+ break;
+ }
+
+ mutex_lock(&qcam->lock);
+ qcam->mode |= QC_MILLIONS;
+ qcam->height = pix->height;
+ qcam->width = pix->width;
+ parport_claim_or_block(qcam->pdev);
+ qc_setup(qcam);
+ parport_release(qcam->pdev);
+ mutex_unlock(&qcam->lock);
+ return 0;
+}
+
+static int qcam_enum_fmt_vid_cap(struct file *file, void *fh, struct v4l2_fmtdesc *fmt)
+{
+ static struct v4l2_fmtdesc formats[] = {
+ { 0, 0, 0,
+ "RGB 8:8:8", V4L2_PIX_FMT_RGB24,
+ { 0, 0, 0, 0 }
+ },
+ };
+ enum v4l2_buf_type type = fmt->type;
+
+ if (fmt->index > 0)
+ return -EINVAL;
+
+ *fmt = formats[fmt->index];
+ fmt->type = type;
+ return 0;
+}
+
+static ssize_t qcam_read(struct file *file, char __user *buf,
+ size_t count, loff_t *ppos)
+{
+ struct qcam *qcam = video_drvdata(file);
+ int len;
+
+ mutex_lock(&qcam->lock);
+ parport_claim_or_block(qcam->pdev);
+ /* Probably should have a semaphore against multiple users */
+ len = qc_capture(qcam, buf, count);
+ parport_release(qcam->pdev);
+ mutex_unlock(&qcam->lock);
+ return len;
+}
+
+static int qcam_s_ctrl(struct v4l2_ctrl *ctrl)
+{
+ struct qcam *qcam =
+ container_of(ctrl->handler, struct qcam, hdl);
+ int ret = 0;
+
+ mutex_lock(&qcam->lock);
+ switch (ctrl->id) {
+ case V4L2_CID_BRIGHTNESS:
+ qcam->brightness = ctrl->val;
+ break;
+ case V4L2_CID_CONTRAST:
+ qcam->contrast = ctrl->val;
+ break;
+ case V4L2_CID_GAMMA:
+ qcam->whitebal = ctrl->val;
+ break;
+ default:
+ ret = -EINVAL;
+ break;
+ }
+ if (ret == 0) {
+ parport_claim_or_block(qcam->pdev);
+ qc_setup(qcam);
+ parport_release(qcam->pdev);
+ }
+ mutex_unlock(&qcam->lock);
+ return ret;
+}
+
+static const struct v4l2_file_operations qcam_fops = {
+ .owner = THIS_MODULE,
+ .open = v4l2_fh_open,
+ .release = v4l2_fh_release,
+ .poll = v4l2_ctrl_poll,
+ .unlocked_ioctl = video_ioctl2,
+ .read = qcam_read,
+};
+
+static const struct v4l2_ioctl_ops qcam_ioctl_ops = {
+ .vidioc_querycap = qcam_querycap,
+ .vidioc_g_input = qcam_g_input,
+ .vidioc_s_input = qcam_s_input,
+ .vidioc_enum_input = qcam_enum_input,
+ .vidioc_enum_fmt_vid_cap = qcam_enum_fmt_vid_cap,
+ .vidioc_g_fmt_vid_cap = qcam_g_fmt_vid_cap,
+ .vidioc_s_fmt_vid_cap = qcam_s_fmt_vid_cap,
+ .vidioc_try_fmt_vid_cap = qcam_try_fmt_vid_cap,
+ .vidioc_log_status = v4l2_ctrl_log_status,
+ .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
+ .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
+};
+
+static const struct v4l2_ctrl_ops qcam_ctrl_ops = {
+ .s_ctrl = qcam_s_ctrl,
+};
+
+/* Initialize the QuickCam driver control structure. */
+
+static struct qcam *qcam_init(struct parport *port)
+{
+ struct qcam *qcam;
+ struct v4l2_device *v4l2_dev;
+
+ qcam = kzalloc(sizeof(*qcam), GFP_KERNEL);
+ if (qcam == NULL)
+ return NULL;
+
+ v4l2_dev = &qcam->v4l2_dev;
+ strlcpy(v4l2_dev->name, "c-qcam", sizeof(v4l2_dev->name));
+
+ if (v4l2_device_register(NULL, v4l2_dev) < 0) {
+ v4l2_err(v4l2_dev, "Could not register v4l2_device\n");
+ kfree(qcam);
+ return NULL;
+ }
+
+ v4l2_ctrl_handler_init(&qcam->hdl, 3);
+ v4l2_ctrl_new_std(&qcam->hdl, &qcam_ctrl_ops,
+ V4L2_CID_BRIGHTNESS, 0, 255, 1, 240);
+ v4l2_ctrl_new_std(&qcam->hdl, &qcam_ctrl_ops,
+ V4L2_CID_CONTRAST, 0, 255, 1, 192);
+ v4l2_ctrl_new_std(&qcam->hdl, &qcam_ctrl_ops,
+ V4L2_CID_GAMMA, 0, 255, 1, 128);
+ if (qcam->hdl.error) {
+ v4l2_err(v4l2_dev, "couldn't register controls\n");
+ v4l2_ctrl_handler_free(&qcam->hdl);
+ kfree(qcam);
+ return NULL;
+ }
+
+ qcam->pport = port;
+ qcam->pdev = parport_register_device(port, "c-qcam", NULL, NULL,
+ NULL, 0, NULL);
+
+ qcam->bidirectional = (qcam->pport->modes & PARPORT_MODE_TRISTATE) ? 1 : 0;
+
+ if (qcam->pdev == NULL) {
+ v4l2_err(v4l2_dev, "couldn't register for %s.\n", port->name);
+ v4l2_ctrl_handler_free(&qcam->hdl);
+ kfree(qcam);
+ return NULL;
+ }
+
+ strlcpy(qcam->vdev.name, "Colour QuickCam", sizeof(qcam->vdev.name));
+ qcam->vdev.v4l2_dev = v4l2_dev;
+ qcam->vdev.fops = &qcam_fops;
+ qcam->vdev.ioctl_ops = &qcam_ioctl_ops;
+ qcam->vdev.release = video_device_release_empty;
+ qcam->vdev.ctrl_handler = &qcam->hdl;
+ set_bit(V4L2_FL_USE_FH_PRIO, &qcam->vdev.flags);
+ video_set_drvdata(&qcam->vdev, qcam);
+
+ mutex_init(&qcam->lock);
+ qcam->width = qcam->ccd_width = 320;
+ qcam->height = qcam->ccd_height = 240;
+ qcam->mode = QC_MILLIONS | QC_DECIMATION_1;
+ qcam->contrast = 192;
+ qcam->brightness = 240;
+ qcam->whitebal = 128;
+ qcam->top = 1;
+ qcam->left = 14;
+ return qcam;
+}
+
+static int init_cqcam(struct parport *port)
+{
+ struct qcam *qcam;
+ struct v4l2_device *v4l2_dev;
+
+ if (parport[0] != -1) {
+ /* The user gave specific instructions */
+ int i, found = 0;
+
+ for (i = 0; i < MAX_CAMS && parport[i] != -1; i++) {
+ if (parport[0] == port->number)
+ found = 1;
+ }
+ if (!found)
+ return -ENODEV;
+ }
+
+ if (num_cams == MAX_CAMS)
+ return -ENOSPC;
+
+ qcam = qcam_init(port);
+ if (qcam == NULL)
+ return -ENODEV;
+
+ v4l2_dev = &qcam->v4l2_dev;
+
+ parport_claim_or_block(qcam->pdev);
+
+ qc_reset(qcam);
+
+ if (probe && qc_detect(qcam) == 0) {
+ parport_release(qcam->pdev);
+ parport_unregister_device(qcam->pdev);
+ kfree(qcam);
+ return -ENODEV;
+ }
+
+ qc_setup(qcam);
+
+ parport_release(qcam->pdev);
+
+ if (video_register_device(&qcam->vdev, VFL_TYPE_GRABBER, video_nr) < 0) {
+ v4l2_err(v4l2_dev, "Unable to register Colour QuickCam on %s\n",
+ qcam->pport->name);
+ parport_unregister_device(qcam->pdev);
+ kfree(qcam);
+ return -ENODEV;
+ }
+
+ v4l2_info(v4l2_dev, "%s: Colour QuickCam found on %s\n",
+ video_device_node_name(&qcam->vdev), qcam->pport->name);
+
+ qcams[num_cams++] = qcam;
+
+ return 0;
+}
+
+static void close_cqcam(struct qcam *qcam)
+{
+ video_unregister_device(&qcam->vdev);
+ v4l2_ctrl_handler_free(&qcam->hdl);
+ parport_unregister_device(qcam->pdev);
+ kfree(qcam);
+}
+
+static void cq_attach(struct parport *port)
+{
+ init_cqcam(port);
+}
+
+static void cq_detach(struct parport *port)
+{
+ /* Write this some day. */
+}
+
+static struct parport_driver cqcam_driver = {
+ .name = "cqcam",
+ .attach = cq_attach,
+ .detach = cq_detach,
+};
+
+static int __init cqcam_init(void)
+{
+ printk(KERN_INFO BANNER "\n");
+
+ return parport_register_driver(&cqcam_driver);
+}
+
+static void __exit cqcam_cleanup(void)
+{
+ unsigned int i;
+
+ for (i = 0; i < num_cams; i++)
+ close_cqcam(qcams[i]);
+
+ parport_unregister_driver(&cqcam_driver);
+}
+
+MODULE_AUTHOR("Philip Blundell <philb@gnu.org>");
+MODULE_DESCRIPTION(BANNER);
+MODULE_LICENSE("GPL");
+MODULE_VERSION("0.0.4");
+
+module_init(cqcam_init);
+module_exit(cqcam_cleanup);
diff --git a/drivers/media/parport/pms.c b/drivers/media/parport/pms.c
new file mode 100644
index 00000000000..77f9c92186f
--- /dev/null
+++ b/drivers/media/parport/pms.c
@@ -0,0 +1,1152 @@
+/*
+ * Media Vision Pro Movie Studio
+ * or
+ * "all you need is an I2C bus some RAM and a prayer"
+ *
+ * This draws heavily on code
+ *
+ * (c) Wolfgang Koehler, wolf@first.gmd.de, Dec. 1994
+ * Kiefernring 15
+ * 14478 Potsdam, Germany
+ *
+ * Most of this code is directly derived from his userspace driver.
+ * His driver works so send any reports to alan@lxorguk.ukuu.org.uk
+ * unless the userspace driver also doesn't work for you...
+ *
+ * Changes:
+ * 25-11-2009 Hans Verkuil <hverkuil@xs4all.nl>
+ * - converted to version 2 of the V4L API.
+ * 08/07/2003 Daniele Bellucci <bellucda@tiscali.it>
+ * - pms_capture: report back -EFAULT
+ */
+
+#include <linux/module.h>
+#include <linux/delay.h>
+#include <linux/errno.h>
+#include <linux/fs.h>
+#include <linux/kernel.h>
+#include <linux/mm.h>
+#include <linux/slab.h>
+#include <linux/ioport.h>
+#include <linux/init.h>
+#include <linux/mutex.h>
+#include <linux/uaccess.h>
+#include <linux/isa.h>
+#include <asm/io.h>
+
+#include <linux/videodev2.h>
+#include <media/v4l2-common.h>
+#include <media/v4l2-ioctl.h>
+#include <media/v4l2-ctrls.h>
+#include <media/v4l2-fh.h>
+#include <media/v4l2-event.h>
+#include <media/v4l2-device.h>
+
+MODULE_LICENSE("GPL");
+MODULE_VERSION("0.0.5");
+
+#define MOTOROLA 1
+#define PHILIPS2 2 /* SAA7191 */
+#define PHILIPS1 3
+#define MVVMEMORYWIDTH 0x40 /* 512 bytes */
+
+struct i2c_info {
+ u8 slave;
+ u8 sub;
+ u8 data;
+ u8 hits;
+};
+
+struct pms {
+ struct v4l2_device v4l2_dev;
+ struct video_device vdev;
+ struct v4l2_ctrl_handler hdl;
+ int height;
+ int width;
+ int depth;
+ int input;
+ struct mutex lock;
+ int i2c_count;
+ struct i2c_info i2cinfo[64];
+
+ int decoder;
+ int standard; /* 0 - auto 1 - ntsc 2 - pal 3 - secam */
+ v4l2_std_id std;
+ int io;
+ int data;
+ void __iomem *mem;
+};
+
+/*
+ * I/O ports and Shared Memory
+ */
+
+static int io_port = 0x250;
+module_param(io_port, int, 0);
+
+static int mem_base = 0xc8000;
+module_param(mem_base, int, 0);
+
+static int video_nr = -1;
+module_param(video_nr, int, 0);
+
+
+static inline void mvv_write(struct pms *dev, u8 index, u8 value)
+{
+ outw(index | (value << 8), dev->io);
+}
+
+static inline u8 mvv_read(struct pms *dev, u8 index)
+{
+ outb(index, dev->io);
+ return inb(dev->data);
+}
+
+static int pms_i2c_stat(struct pms *dev, u8 slave)
+{
+ int counter = 0;
+ int i;
+
+ outb(0x28, dev->io);
+
+ while ((inb(dev->data) & 0x01) == 0)
+ if (counter++ == 256)
+ break;
+
+ while ((inb(dev->data) & 0x01) != 0)
+ if (counter++ == 256)
+ break;
+
+ outb(slave, dev->io);
+
+ counter = 0;
+ while ((inb(dev->data) & 0x01) == 0)
+ if (counter++ == 256)
+ break;
+
+ while ((inb(dev->data) & 0x01) != 0)
+ if (counter++ == 256)
+ break;
+
+ for (i = 0; i < 12; i++) {
+ char st = inb(dev->data);
+
+ if ((st & 2) != 0)
+ return -1;
+ if ((st & 1) == 0)
+ break;
+ }
+ outb(0x29, dev->io);
+ return inb(dev->data);
+}
+
+static int pms_i2c_write(struct pms *dev, u16 slave, u16 sub, u16 data)
+{
+ int skip = 0;
+ int count;
+ int i;
+
+ for (i = 0; i < dev->i2c_count; i++) {
+ if ((dev->i2cinfo[i].slave == slave) &&
+ (dev->i2cinfo[i].sub == sub)) {
+ if (dev->i2cinfo[i].data == data)
+ skip = 1;
+ dev->i2cinfo[i].data = data;
+ i = dev->i2c_count + 1;
+ }
+ }
+
+ if (i == dev->i2c_count && dev->i2c_count < 64) {
+ dev->i2cinfo[dev->i2c_count].slave = slave;
+ dev->i2cinfo[dev->i2c_count].sub = sub;
+ dev->i2cinfo[dev->i2c_count].data = data;
+ dev->i2c_count++;
+ }
+
+ if (skip)
+ return 0;
+
+ mvv_write(dev, 0x29, sub);
+ mvv_write(dev, 0x2A, data);
+ mvv_write(dev, 0x28, slave);
+
+ outb(0x28, dev->io);
+
+ count = 0;
+ while ((inb(dev->data) & 1) == 0)
+ if (count > 255)
+ break;
+ while ((inb(dev->data) & 1) != 0)
+ if (count > 255)
+ break;
+
+ count = inb(dev->data);
+
+ if (count & 2)
+ return -1;
+ return count;
+}
+
+static int pms_i2c_read(struct pms *dev, int slave, int sub)
+{
+ int i;
+
+ for (i = 0; i < dev->i2c_count; i++) {
+ if (dev->i2cinfo[i].slave == slave && dev->i2cinfo[i].sub == sub)
+ return dev->i2cinfo[i].data;
+ }
+ return 0;
+}
+
+
+static void pms_i2c_andor(struct pms *dev, int slave, int sub, int and, int or)
+{
+ u8 tmp;
+
+ tmp = pms_i2c_read(dev, slave, sub);
+ tmp = (tmp & and) | or;
+ pms_i2c_write(dev, slave, sub, tmp);
+}
+
+/*
+ * Control functions
+ */
+
+
+static void pms_videosource(struct pms *dev, short source)
+{
+ switch (dev->decoder) {
+ case MOTOROLA:
+ break;
+ case PHILIPS2:
+ pms_i2c_andor(dev, 0x8a, 0x06, 0x7f, source ? 0x80 : 0);
+ break;
+ case PHILIPS1:
+ break;
+ }
+ mvv_write(dev, 0x2E, 0x31);
+ /* Was: mvv_write(dev, 0x2E, source ? 0x31 : 0x30);
+ But could not make this work correctly. Only Composite input
+ worked for me. */
+}
+
+static void pms_hue(struct pms *dev, short hue)
+{
+ switch (dev->decoder) {
+ case MOTOROLA:
+ pms_i2c_write(dev, 0x8a, 0x00, hue);
+ break;
+ case PHILIPS2:
+ pms_i2c_write(dev, 0x8a, 0x07, hue);
+ break;
+ case PHILIPS1:
+ pms_i2c_write(dev, 0x42, 0x07, hue);
+ break;
+ }
+}
+
+static void pms_saturation(struct pms *dev, short sat)
+{
+ switch (dev->decoder) {
+ case MOTOROLA:
+ pms_i2c_write(dev, 0x8a, 0x00, sat);
+ break;
+ case PHILIPS1:
+ pms_i2c_write(dev, 0x42, 0x12, sat);
+ break;
+ }
+}
+
+
+static void pms_contrast(struct pms *dev, short contrast)
+{
+ switch (dev->decoder) {
+ case MOTOROLA:
+ pms_i2c_write(dev, 0x8a, 0x00, contrast);
+ break;
+ case PHILIPS1:
+ pms_i2c_write(dev, 0x42, 0x13, contrast);
+ break;
+ }
+}
+
+static void pms_brightness(struct pms *dev, short brightness)
+{
+ switch (dev->decoder) {
+ case MOTOROLA:
+ pms_i2c_write(dev, 0x8a, 0x00, brightness);
+ pms_i2c_write(dev, 0x8a, 0x00, brightness);
+ pms_i2c_write(dev, 0x8a, 0x00, brightness);
+ break;
+ case PHILIPS1:
+ pms_i2c_write(dev, 0x42, 0x19, brightness);
+ break;
+ }
+}
+
+
+static void pms_format(struct pms *dev, short format)
+{
+ int target;
+
+ dev->standard = format;
+
+ if (dev->decoder == PHILIPS1)
+ target = 0x42;
+ else if (dev->decoder == PHILIPS2)
+ target = 0x8a;
+ else
+ return;
+
+ switch (format) {
+ case 0: /* Auto */
+ pms_i2c_andor(dev, target, 0x0d, 0xfe, 0x00);
+ pms_i2c_andor(dev, target, 0x0f, 0x3f, 0x80);
+ break;
+ case 1: /* NTSC */
+ pms_i2c_andor(dev, target, 0x0d, 0xfe, 0x00);
+ pms_i2c_andor(dev, target, 0x0f, 0x3f, 0x40);
+ break;
+ case 2: /* PAL */
+ pms_i2c_andor(dev, target, 0x0d, 0xfe, 0x00);
+ pms_i2c_andor(dev, target, 0x0f, 0x3f, 0x00);
+ break;
+ case 3: /* SECAM */
+ pms_i2c_andor(dev, target, 0x0d, 0xfe, 0x01);
+ pms_i2c_andor(dev, target, 0x0f, 0x3f, 0x00);
+ break;
+ }
+}
+
+#ifdef FOR_FUTURE_EXPANSION
+
+/*
+ * These features of the PMS card are not currently exposes. They
+ * could become a private v4l ioctl for PMSCONFIG or somesuch if
+ * people need it. We also don't yet use the PMS interrupt.
+ */
+
+static void pms_hstart(struct pms *dev, short start)
+{
+ switch (dev->decoder) {
+ case PHILIPS1:
+ pms_i2c_write(dev, 0x8a, 0x05, start);
+ pms_i2c_write(dev, 0x8a, 0x18, start);
+ break;
+ case PHILIPS2:
+ pms_i2c_write(dev, 0x42, 0x05, start);
+ pms_i2c_write(dev, 0x42, 0x18, start);
+ break;
+ }
+}
+
+/*
+ * Bandpass filters
+ */
+
+static void pms_bandpass(struct pms *dev, short pass)
+{
+ if (dev->decoder == PHILIPS2)
+ pms_i2c_andor(dev, 0x8a, 0x06, 0xcf, (pass & 0x03) << 4);
+ else if (dev->decoder == PHILIPS1)
+ pms_i2c_andor(dev, 0x42, 0x06, 0xcf, (pass & 0x03) << 4);
+}
+
+static void pms_antisnow(struct pms *dev, short snow)
+{
+ if (dev->decoder == PHILIPS2)
+ pms_i2c_andor(dev, 0x8a, 0x06, 0xf3, (snow & 0x03) << 2);
+ else if (dev->decoder == PHILIPS1)
+ pms_i2c_andor(dev, 0x42, 0x06, 0xf3, (snow & 0x03) << 2);
+}
+
+static void pms_sharpness(struct pms *dev, short sharp)
+{
+ if (dev->decoder == PHILIPS2)
+ pms_i2c_andor(dev, 0x8a, 0x06, 0xfc, sharp & 0x03);
+ else if (dev->decoder == PHILIPS1)
+ pms_i2c_andor(dev, 0x42, 0x06, 0xfc, sharp & 0x03);
+}
+
+static void pms_chromaagc(struct pms *dev, short agc)
+{
+ if (dev->decoder == PHILIPS2)
+ pms_i2c_andor(dev, 0x8a, 0x0c, 0x9f, (agc & 0x03) << 5);
+ else if (dev->decoder == PHILIPS1)
+ pms_i2c_andor(dev, 0x42, 0x0c, 0x9f, (agc & 0x03) << 5);
+}
+
+static void pms_vertnoise(struct pms *dev, short noise)
+{
+ if (dev->decoder == PHILIPS2)
+ pms_i2c_andor(dev, 0x8a, 0x10, 0xfc, noise & 3);
+ else if (dev->decoder == PHILIPS1)
+ pms_i2c_andor(dev, 0x42, 0x10, 0xfc, noise & 3);
+}
+
+static void pms_forcecolour(struct pms *dev, short colour)
+{
+ if (dev->decoder == PHILIPS2)
+ pms_i2c_andor(dev, 0x8a, 0x0c, 0x7f, (colour & 1) << 7);
+ else if (dev->decoder == PHILIPS1)
+ pms_i2c_andor(dev, 0x42, 0x0c, 0x7, (colour & 1) << 7);
+}
+
+static void pms_antigamma(struct pms *dev, short gamma)
+{
+ if (dev->decoder == PHILIPS2)
+ pms_i2c_andor(dev, 0xb8, 0x00, 0x7f, (gamma & 1) << 7);
+ else if (dev->decoder == PHILIPS1)
+ pms_i2c_andor(dev, 0x42, 0x20, 0x7, (gamma & 1) << 7);
+}
+
+static void pms_prefilter(struct pms *dev, short filter)
+{
+ if (dev->decoder == PHILIPS2)
+ pms_i2c_andor(dev, 0x8a, 0x06, 0xbf, (filter & 1) << 6);
+ else if (dev->decoder == PHILIPS1)
+ pms_i2c_andor(dev, 0x42, 0x06, 0xbf, (filter & 1) << 6);
+}
+
+static void pms_hfilter(struct pms *dev, short filter)
+{
+ if (dev->decoder == PHILIPS2)
+ pms_i2c_andor(dev, 0xb8, 0x04, 0x1f, (filter & 7) << 5);
+ else if (dev->decoder == PHILIPS1)
+ pms_i2c_andor(dev, 0x42, 0x24, 0x1f, (filter & 7) << 5);
+}
+
+static void pms_vfilter(struct pms *dev, short filter)
+{
+ if (dev->decoder == PHILIPS2)
+ pms_i2c_andor(dev, 0xb8, 0x08, 0x9f, (filter & 3) << 5);
+ else if (dev->decoder == PHILIPS1)
+ pms_i2c_andor(dev, 0x42, 0x28, 0x9f, (filter & 3) << 5);
+}
+
+static void pms_killcolour(struct pms *dev, short colour)
+{
+ if (dev->decoder == PHILIPS2) {
+ pms_i2c_andor(dev, 0x8a, 0x08, 0x07, (colour & 0x1f) << 3);
+ pms_i2c_andor(dev, 0x8a, 0x09, 0x07, (colour & 0x1f) << 3);
+ } else if (dev->decoder == PHILIPS1) {
+ pms_i2c_andor(dev, 0x42, 0x08, 0x07, (colour & 0x1f) << 3);
+ pms_i2c_andor(dev, 0x42, 0x09, 0x07, (colour & 0x1f) << 3);
+ }
+}
+
+static void pms_chromagain(struct pms *dev, short chroma)
+{
+ if (dev->decoder == PHILIPS2)
+ pms_i2c_write(dev, 0x8a, 0x11, chroma);
+ else if (dev->decoder == PHILIPS1)
+ pms_i2c_write(dev, 0x42, 0x11, chroma);
+}
+
+
+static void pms_spacialcompl(struct pms *dev, short data)
+{
+ mvv_write(dev, 0x3b, data);
+}
+
+static void pms_spacialcomph(struct pms *dev, short data)
+{
+ mvv_write(dev, 0x3a, data);
+}
+
+static void pms_vstart(struct pms *dev, short start)
+{
+ mvv_write(dev, 0x16, start);
+ mvv_write(dev, 0x17, (start >> 8) & 0x01);
+}
+
+#endif
+
+static void pms_secamcross(struct pms *dev, short cross)
+{
+ if (dev->decoder == PHILIPS2)
+ pms_i2c_andor(dev, 0x8a, 0x0f, 0xdf, (cross & 1) << 5);
+ else if (dev->decoder == PHILIPS1)
+ pms_i2c_andor(dev, 0x42, 0x0f, 0xdf, (cross & 1) << 5);
+}
+
+
+static void pms_swsense(struct pms *dev, short sense)
+{
+ if (dev->decoder == PHILIPS2) {
+ pms_i2c_write(dev, 0x8a, 0x0a, sense);
+ pms_i2c_write(dev, 0x8a, 0x0b, sense);
+ } else if (dev->decoder == PHILIPS1) {
+ pms_i2c_write(dev, 0x42, 0x0a, sense);
+ pms_i2c_write(dev, 0x42, 0x0b, sense);
+ }
+}
+
+
+static void pms_framerate(struct pms *dev, short frr)
+{
+ int fps = (dev->std & V4L2_STD_525_60) ? 30 : 25;
+
+ if (frr == 0)
+ return;
+ fps = fps/frr;
+ mvv_write(dev, 0x14, 0x80 | fps);
+ mvv_write(dev, 0x15, 1);
+}
+
+static void pms_vert(struct pms *dev, u8 deciden, u8 decinum)
+{
+ mvv_write(dev, 0x1c, deciden); /* Denominator */
+ mvv_write(dev, 0x1d, decinum); /* Numerator */
+}
+
+/*
+ * Turn 16bit ratios into best small ratio the chipset can grok
+ */
+
+static void pms_vertdeci(struct pms *dev, unsigned short decinum, unsigned short deciden)
+{
+ /* Knock it down by / 5 once */
+ if (decinum % 5 == 0) {
+ deciden /= 5;
+ decinum /= 5;
+ }
+ /*
+ * 3's
+ */
+ while (decinum % 3 == 0 && deciden % 3 == 0) {
+ deciden /= 3;
+ decinum /= 3;
+ }
+ /*
+ * 2's
+ */
+ while (decinum % 2 == 0 && deciden % 2 == 0) {
+ decinum /= 2;
+ deciden /= 2;
+ }
+ /*
+ * Fudgyify
+ */
+ while (deciden > 32) {
+ deciden /= 2;
+ decinum = (decinum + 1) / 2;
+ }
+ if (deciden == 32)
+ deciden--;
+ pms_vert(dev, deciden, decinum);
+}
+
+static void pms_horzdeci(struct pms *dev, short decinum, short deciden)
+{
+ if (decinum <= 512) {
+ if (decinum % 5 == 0) {
+ decinum /= 5;
+ deciden /= 5;
+ }
+ } else {
+ decinum = 512;
+ deciden = 640; /* 768 would be ideal */
+ }
+
+ while (((decinum | deciden) & 1) == 0) {
+ decinum >>= 1;
+ deciden >>= 1;
+ }
+ while (deciden > 32) {
+ deciden >>= 1;
+ decinum = (decinum + 1) >> 1;
+ }
+ if (deciden == 32)
+ deciden--;
+
+ mvv_write(dev, 0x24, 0x80 | deciden);
+ mvv_write(dev, 0x25, decinum);
+}
+
+static void pms_resolution(struct pms *dev, short width, short height)
+{
+ int fg_height;
+
+ fg_height = height;
+ if (fg_height > 280)
+ fg_height = 280;
+
+ mvv_write(dev, 0x18, fg_height);
+ mvv_write(dev, 0x19, fg_height >> 8);
+
+ if (dev->std & V4L2_STD_525_60) {
+ mvv_write(dev, 0x1a, 0xfc);
+ mvv_write(dev, 0x1b, 0x00);
+ if (height > fg_height)
+ pms_vertdeci(dev, 240, 240);
+ else
+ pms_vertdeci(dev, fg_height, 240);
+ } else {
+ mvv_write(dev, 0x1a, 0x1a);
+ mvv_write(dev, 0x1b, 0x01);
+ if (fg_height > 256)
+ pms_vertdeci(dev, 270, 270);
+ else
+ pms_vertdeci(dev, fg_height, 270);
+ }
+ mvv_write(dev, 0x12, 0);
+ mvv_write(dev, 0x13, MVVMEMORYWIDTH);
+ mvv_write(dev, 0x42, 0x00);
+ mvv_write(dev, 0x43, 0x00);
+ mvv_write(dev, 0x44, MVVMEMORYWIDTH);
+
+ mvv_write(dev, 0x22, width + 8);
+ mvv_write(dev, 0x23, (width + 8) >> 8);
+
+ if (dev->std & V4L2_STD_525_60)
+ pms_horzdeci(dev, width, 640);
+ else
+ pms_horzdeci(dev, width + 8, 768);
+
+ mvv_write(dev, 0x30, mvv_read(dev, 0x30) & 0xfe);
+ mvv_write(dev, 0x08, mvv_read(dev, 0x08) | 0x01);
+ mvv_write(dev, 0x01, mvv_read(dev, 0x01) & 0xfd);
+ mvv_write(dev, 0x32, 0x00);
+ mvv_write(dev, 0x33, MVVMEMORYWIDTH);
+}
+
+
+/*
+ * Set Input
+ */
+
+static void pms_vcrinput(struct pms *dev, short input)
+{
+ if (dev->decoder == PHILIPS2)
+ pms_i2c_andor(dev, 0x8a, 0x0d, 0x7f, (input & 1) << 7);
+ else if (dev->decoder == PHILIPS1)
+ pms_i2c_andor(dev, 0x42, 0x0d, 0x7f, (input & 1) << 7);
+}
+
+
+static int pms_capture(struct pms *dev, char __user *buf, int rgb555, int count)
+{
+ int y;
+ int dw = 2 * dev->width;
+ char tmp[dw + 32]; /* using a temp buffer is faster than direct */
+ int cnt = 0;
+ int len = 0;
+ unsigned char r8 = 0x5; /* value for reg8 */
+
+ if (rgb555)
+ r8 |= 0x20; /* else use untranslated rgb = 565 */
+ mvv_write(dev, 0x08, r8); /* capture rgb555/565, init DRAM, PC enable */
+
+/* printf("%d %d %d %d %d %x %x\n",width,height,voff,nom,den,mvv_buf); */
+
+ for (y = 0; y < dev->height; y++) {
+ writeb(0, dev->mem); /* synchronisiert neue Zeile */
+
+ /*
+ * This is in truth a fifo, be very careful as if you
+ * forgot this odd things will occur 8)
+ */
+
+ memcpy_fromio(tmp, dev->mem, dw + 32); /* discard 16 word */
+ cnt -= dev->height;
+ while (cnt <= 0) {
+ /*
+ * Don't copy too far
+ */
+ int dt = dw;
+ if (dt + len > count)
+ dt = count - len;
+ cnt += dev->height;
+ if (copy_to_user(buf, tmp + 32, dt))
+ return len ? len : -EFAULT;
+ buf += dt;
+ len += dt;
+ }
+ }
+ return len;
+}
+
+
+/*
+ * Video4linux interfacing
+ */
+
+static int pms_querycap(struct file *file, void *priv,
+ struct v4l2_capability *vcap)
+{
+ struct pms *dev = video_drvdata(file);
+
+ strlcpy(vcap->driver, dev->v4l2_dev.name, sizeof(vcap->driver));
+ strlcpy(vcap->card, "Mediavision PMS", sizeof(vcap->card));
+ snprintf(vcap->bus_info, sizeof(vcap->bus_info),
+ "ISA:%s", dev->v4l2_dev.name);
+ vcap->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_READWRITE;
+ vcap->capabilities = vcap->device_caps | V4L2_CAP_DEVICE_CAPS;
+ return 0;
+}
+
+static int pms_enum_input(struct file *file, void *fh, struct v4l2_input *vin)
+{
+ static const char *inputs[4] = {
+ "Composite",
+ "S-Video",
+ "Composite (VCR)",
+ "S-Video (VCR)"
+ };
+
+ if (vin->index > 3)
+ return -EINVAL;
+ strlcpy(vin->name, inputs[vin->index], sizeof(vin->name));
+ vin->type = V4L2_INPUT_TYPE_CAMERA;
+ vin->audioset = 0;
+ vin->tuner = 0;
+ vin->std = V4L2_STD_ALL;
+ vin->status = 0;
+ return 0;
+}
+
+static int pms_g_input(struct file *file, void *fh, unsigned int *inp)
+{
+ struct pms *dev = video_drvdata(file);
+
+ *inp = dev->input;
+ return 0;
+}
+
+static int pms_s_input(struct file *file, void *fh, unsigned int inp)
+{
+ struct pms *dev = video_drvdata(file);
+
+ if (inp > 3)
+ return -EINVAL;
+
+ dev->input = inp;
+ pms_videosource(dev, inp & 1);
+ pms_vcrinput(dev, inp >> 1);
+ return 0;
+}
+
+static int pms_g_std(struct file *file, void *fh, v4l2_std_id *std)
+{
+ struct pms *dev = video_drvdata(file);
+
+ *std = dev->std;
+ return 0;
+}
+
+static int pms_s_std(struct file *file, void *fh, v4l2_std_id *std)
+{
+ struct pms *dev = video_drvdata(file);
+ int ret = 0;
+
+ dev->std = *std;
+ if (dev->std & V4L2_STD_NTSC) {
+ pms_framerate(dev, 30);
+ pms_secamcross(dev, 0);
+ pms_format(dev, 1);
+ } else if (dev->std & V4L2_STD_PAL) {
+ pms_framerate(dev, 25);
+ pms_secamcross(dev, 0);
+ pms_format(dev, 2);
+ } else if (dev->std & V4L2_STD_SECAM) {
+ pms_framerate(dev, 25);
+ pms_secamcross(dev, 1);
+ pms_format(dev, 2);
+ } else {
+ ret = -EINVAL;
+ }
+ /*
+ switch (v->mode) {
+ case VIDEO_MODE_AUTO:
+ pms_framerate(dev, 25);
+ pms_secamcross(dev, 0);
+ pms_format(dev, 0);
+ break;
+ }*/
+ return ret;
+}
+
+static int pms_s_ctrl(struct v4l2_ctrl *ctrl)
+{
+ struct pms *dev = container_of(ctrl->handler, struct pms, hdl);
+ int ret = 0;
+
+ switch (ctrl->id) {
+ case V4L2_CID_BRIGHTNESS:
+ pms_brightness(dev, ctrl->val);
+ break;
+ case V4L2_CID_CONTRAST:
+ pms_contrast(dev, ctrl->val);
+ break;
+ case V4L2_CID_SATURATION:
+ pms_saturation(dev, ctrl->val);
+ break;
+ case V4L2_CID_HUE:
+ pms_hue(dev, ctrl->val);
+ break;
+ default:
+ ret = -EINVAL;
+ break;
+ }
+ return ret;
+}
+
+static int pms_g_fmt_vid_cap(struct file *file, void *fh, struct v4l2_format *fmt)
+{
+ struct pms *dev = video_drvdata(file);
+ struct v4l2_pix_format *pix = &fmt->fmt.pix;
+
+ pix->width = dev->width;
+ pix->height = dev->height;
+ pix->pixelformat = dev->width == 15 ?
+ V4L2_PIX_FMT_RGB555 : V4L2_PIX_FMT_RGB565;
+ pix->field = V4L2_FIELD_NONE;
+ pix->bytesperline = 2 * dev->width;
+ pix->sizeimage = 2 * dev->width * dev->height;
+ /* Just a guess */
+ pix->colorspace = V4L2_COLORSPACE_SRGB;
+ return 0;
+}
+
+static int pms_try_fmt_vid_cap(struct file *file, void *fh, struct v4l2_format *fmt)
+{
+ struct v4l2_pix_format *pix = &fmt->fmt.pix;
+
+ if (pix->height < 16 || pix->height > 480)
+ return -EINVAL;
+ if (pix->width < 16 || pix->width > 640)
+ return -EINVAL;
+ if (pix->pixelformat != V4L2_PIX_FMT_RGB555 &&
+ pix->pixelformat != V4L2_PIX_FMT_RGB565)
+ return -EINVAL;
+ pix->field = V4L2_FIELD_NONE;
+ pix->bytesperline = 2 * pix->width;
+ pix->sizeimage = 2 * pix->width * pix->height;
+ /* Just a guess */
+ pix->colorspace = V4L2_COLORSPACE_SRGB;
+ return 0;
+}
+
+static int pms_s_fmt_vid_cap(struct file *file, void *fh, struct v4l2_format *fmt)
+{
+ struct pms *dev = video_drvdata(file);
+ struct v4l2_pix_format *pix = &fmt->fmt.pix;
+ int ret = pms_try_fmt_vid_cap(file, fh, fmt);
+
+ if (ret)
+ return ret;
+ dev->width = pix->width;
+ dev->height = pix->height;
+ dev->depth = (pix->pixelformat == V4L2_PIX_FMT_RGB555) ? 15 : 16;
+ pms_resolution(dev, dev->width, dev->height);
+ /* Ok we figured out what to use from our wide choice */
+ return 0;
+}
+
+static int pms_enum_fmt_vid_cap(struct file *file, void *fh, struct v4l2_fmtdesc *fmt)
+{
+ static struct v4l2_fmtdesc formats[] = {
+ { 0, 0, 0,
+ "RGB 5:5:5", V4L2_PIX_FMT_RGB555,
+ { 0, 0, 0, 0 }
+ },
+ { 1, 0, 0,
+ "RGB 5:6:5", V4L2_PIX_FMT_RGB565,
+ { 0, 0, 0, 0 }
+ },
+ };
+ enum v4l2_buf_type type = fmt->type;
+
+ if (fmt->index > 1)
+ return -EINVAL;
+
+ *fmt = formats[fmt->index];
+ fmt->type = type;
+ return 0;
+}
+
+static ssize_t pms_read(struct file *file, char __user *buf,
+ size_t count, loff_t *ppos)
+{
+ struct pms *dev = video_drvdata(file);
+ int len;
+
+ len = pms_capture(dev, buf, (dev->depth == 15), count);
+ return len;
+}
+
+static unsigned int pms_poll(struct file *file, struct poll_table_struct *wait)
+{
+ struct v4l2_fh *fh = file->private_data;
+ unsigned int res = POLLIN | POLLRDNORM;
+
+ if (v4l2_event_pending(fh))
+ res |= POLLPRI;
+ poll_wait(file, &fh->wait, wait);
+ return res;
+}
+
+static const struct v4l2_file_operations pms_fops = {
+ .owner = THIS_MODULE,
+ .open = v4l2_fh_open,
+ .release = v4l2_fh_release,
+ .poll = pms_poll,
+ .unlocked_ioctl = video_ioctl2,
+ .read = pms_read,
+};
+
+static const struct v4l2_ioctl_ops pms_ioctl_ops = {
+ .vidioc_querycap = pms_querycap,
+ .vidioc_g_input = pms_g_input,
+ .vidioc_s_input = pms_s_input,
+ .vidioc_enum_input = pms_enum_input,
+ .vidioc_g_std = pms_g_std,
+ .vidioc_s_std = pms_s_std,
+ .vidioc_enum_fmt_vid_cap = pms_enum_fmt_vid_cap,
+ .vidioc_g_fmt_vid_cap = pms_g_fmt_vid_cap,
+ .vidioc_s_fmt_vid_cap = pms_s_fmt_vid_cap,
+ .vidioc_try_fmt_vid_cap = pms_try_fmt_vid_cap,
+ .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
+ .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
+};
+
+/*
+ * Probe for and initialise the Mediavision PMS
+ */
+
+static int init_mediavision(struct pms *dev)
+{
+ int idec, decst;
+ int i;
+ static const unsigned char i2c_defs[] = {
+ 0x4c, 0x30, 0x00, 0xe8,
+ 0xb6, 0xe2, 0x00, 0x00,
+ 0xff, 0xff, 0x00, 0x00,
+ 0x00, 0x00, 0x78, 0x98,
+ 0x00, 0x00, 0x00, 0x00,
+ 0x34, 0x0a, 0xf4, 0xce,
+ 0xe4
+ };
+
+ dev->mem = ioremap(mem_base, 0x800);
+ if (!dev->mem)
+ return -ENOMEM;
+
+ if (!request_region(0x9a01, 1, "Mediavision PMS config")) {
+ printk(KERN_WARNING "mediavision: unable to detect: 0x9a01 in use.\n");
+ iounmap(dev->mem);
+ return -EBUSY;
+ }
+ if (!request_region(dev->io, 3, "Mediavision PMS")) {
+ printk(KERN_WARNING "mediavision: I/O port %d in use.\n", dev->io);
+ release_region(0x9a01, 1);
+ iounmap(dev->mem);
+ return -EBUSY;
+ }
+ outb(0xb8, 0x9a01); /* Unlock */
+ outb(dev->io >> 4, 0x9a01); /* Set IO port */
+
+
+ decst = pms_i2c_stat(dev, 0x43);
+
+ if (decst != -1)
+ idec = 2;
+ else if (pms_i2c_stat(dev, 0xb9) != -1)
+ idec = 3;
+ else if (pms_i2c_stat(dev, 0x8b) != -1)
+ idec = 1;
+ else
+ idec = 0;
+
+ printk(KERN_INFO "PMS type is %d\n", idec);
+ if (idec == 0) {
+ release_region(dev->io, 3);
+ release_region(0x9a01, 1);
+ iounmap(dev->mem);
+ return -ENODEV;
+ }
+
+ /*
+ * Ok we have a PMS of some sort
+ */
+
+ mvv_write(dev, 0x04, mem_base >> 12); /* Set the memory area */
+
+ /* Ok now load the defaults */
+
+ for (i = 0; i < 0x19; i++) {
+ if (i2c_defs[i] == 0xff)
+ pms_i2c_andor(dev, 0x8a, i, 0x07, 0x00);
+ else
+ pms_i2c_write(dev, 0x8a, i, i2c_defs[i]);
+ }
+
+ pms_i2c_write(dev, 0xb8, 0x00, 0x12);
+ pms_i2c_write(dev, 0xb8, 0x04, 0x00);
+ pms_i2c_write(dev, 0xb8, 0x07, 0x00);
+ pms_i2c_write(dev, 0xb8, 0x08, 0x00);
+ pms_i2c_write(dev, 0xb8, 0x09, 0xff);
+ pms_i2c_write(dev, 0xb8, 0x0a, 0x00);
+ pms_i2c_write(dev, 0xb8, 0x0b, 0x10);
+ pms_i2c_write(dev, 0xb8, 0x10, 0x03);
+
+ mvv_write(dev, 0x01, 0x00);
+ mvv_write(dev, 0x05, 0xa0);
+ mvv_write(dev, 0x08, 0x25);
+ mvv_write(dev, 0x09, 0x00);
+ mvv_write(dev, 0x0a, 0x20 | MVVMEMORYWIDTH);
+
+ mvv_write(dev, 0x10, 0x02);
+ mvv_write(dev, 0x1e, 0x0c);
+ mvv_write(dev, 0x1f, 0x03);
+ mvv_write(dev, 0x26, 0x06);
+
+ mvv_write(dev, 0x2b, 0x00);
+ mvv_write(dev, 0x2c, 0x20);
+ mvv_write(dev, 0x2d, 0x00);
+ mvv_write(dev, 0x2f, 0x70);
+ mvv_write(dev, 0x32, 0x00);
+ mvv_write(dev, 0x33, MVVMEMORYWIDTH);
+ mvv_write(dev, 0x34, 0x00);
+ mvv_write(dev, 0x35, 0x00);
+ mvv_write(dev, 0x3a, 0x80);
+ mvv_write(dev, 0x3b, 0x10);
+ mvv_write(dev, 0x20, 0x00);
+ mvv_write(dev, 0x21, 0x00);
+ mvv_write(dev, 0x30, 0x22);
+ return 0;
+}
+
+/*
+ * Initialization and module stuff
+ */
+
+#ifndef MODULE
+static int enable;
+module_param(enable, int, 0);
+#endif
+
+static const struct v4l2_ctrl_ops pms_ctrl_ops = {
+ .s_ctrl = pms_s_ctrl,
+};
+
+static int pms_probe(struct device *pdev, unsigned int card)
+{
+ struct pms *dev;
+ struct v4l2_device *v4l2_dev;
+ struct v4l2_ctrl_handler *hdl;
+ int res;
+
+#ifndef MODULE
+ if (!enable) {
+ pr_err("PMS: not enabled, use pms.enable=1 to probe\n");
+ return -ENODEV;
+ }
+#endif
+
+ dev = kzalloc(sizeof(*dev), GFP_KERNEL);
+ if (dev == NULL)
+ return -ENOMEM;
+
+ dev->decoder = PHILIPS2;
+ dev->io = io_port;
+ dev->data = io_port + 1;
+ v4l2_dev = &dev->v4l2_dev;
+ hdl = &dev->hdl;
+
+ res = v4l2_device_register(pdev, v4l2_dev);
+ if (res < 0) {
+ v4l2_err(v4l2_dev, "Could not register v4l2_device\n");
+ goto free_dev;
+ }
+ v4l2_info(v4l2_dev, "Mediavision Pro Movie Studio driver 0.05\n");
+
+ res = init_mediavision(dev);
+ if (res) {
+ v4l2_err(v4l2_dev, "Board not found.\n");
+ goto free_io;
+ }
+
+ v4l2_ctrl_handler_init(hdl, 4);
+ v4l2_ctrl_new_std(hdl, &pms_ctrl_ops,
+ V4L2_CID_BRIGHTNESS, 0, 255, 1, 139);
+ v4l2_ctrl_new_std(hdl, &pms_ctrl_ops,
+ V4L2_CID_CONTRAST, 0, 255, 1, 70);
+ v4l2_ctrl_new_std(hdl, &pms_ctrl_ops,
+ V4L2_CID_SATURATION, 0, 255, 1, 64);
+ v4l2_ctrl_new_std(hdl, &pms_ctrl_ops,
+ V4L2_CID_HUE, 0, 255, 1, 0);
+ if (hdl->error) {
+ res = hdl->error;
+ goto free_hdl;
+ }
+
+ mutex_init(&dev->lock);
+ strlcpy(dev->vdev.name, v4l2_dev->name, sizeof(dev->vdev.name));
+ dev->vdev.v4l2_dev = v4l2_dev;
+ dev->vdev.ctrl_handler = hdl;
+ dev->vdev.fops = &pms_fops;
+ dev->vdev.ioctl_ops = &pms_ioctl_ops;
+ dev->vdev.release = video_device_release_empty;
+ dev->vdev.lock = &dev->lock;
+ dev->vdev.tvnorms = V4L2_STD_NTSC | V4L2_STD_PAL | V4L2_STD_SECAM;
+ set_bit(V4L2_FL_USE_FH_PRIO, &dev->vdev.flags);
+ video_set_drvdata(&dev->vdev, dev);
+ dev->std = V4L2_STD_NTSC_M;
+ dev->height = 240;
+ dev->width = 320;
+ dev->depth = 16;
+ pms_swsense(dev, 75);
+ pms_resolution(dev, 320, 240);
+ pms_videosource(dev, 0);
+ pms_vcrinput(dev, 0);
+ v4l2_ctrl_handler_setup(hdl);
+ res = video_register_device(&dev->vdev, VFL_TYPE_GRABBER, video_nr);
+ if (res >= 0)
+ return 0;
+
+free_hdl:
+ v4l2_ctrl_handler_free(hdl);
+ v4l2_device_unregister(&dev->v4l2_dev);
+free_io:
+ release_region(dev->io, 3);
+ release_region(0x9a01, 1);
+ iounmap(dev->mem);
+free_dev:
+ kfree(dev);
+ return res;
+}
+
+static int pms_remove(struct device *pdev, unsigned int card)
+{
+ struct pms *dev = dev_get_drvdata(pdev);
+
+ video_unregister_device(&dev->vdev);
+ v4l2_ctrl_handler_free(&dev->hdl);
+ release_region(dev->io, 3);
+ release_region(0x9a01, 1);
+ iounmap(dev->mem);
+ return 0;
+}
+
+static struct isa_driver pms_driver = {
+ .probe = pms_probe,
+ .remove = pms_remove,
+ .driver = {
+ .name = "pms",
+ },
+};
+
+static int __init pms_init(void)
+{
+ return isa_register_driver(&pms_driver, 1);
+}
+
+static void __exit pms_exit(void)
+{
+ isa_unregister_driver(&pms_driver);
+}
+
+module_init(pms_init);
+module_exit(pms_exit);
diff --git a/drivers/media/parport/w9966.c b/drivers/media/parport/w9966.c
new file mode 100644
index 00000000000..db2a6003a1c
--- /dev/null
+++ b/drivers/media/parport/w9966.c
@@ -0,0 +1,981 @@
+/*
+ Winbond w9966cf Webcam parport driver.
+
+ Version 0.33
+
+ Copyright (C) 2001 Jakob Kemi <jakob.kemi@post.utfors.se>
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+*/
+/*
+ Supported devices:
+ *Lifeview FlyCam Supra (using the Philips saa7111a chip)
+
+ Does any other model using the w9966 interface chip exist ?
+
+ Todo:
+
+ *Add a working EPP mode, since DMA ECP read isn't implemented
+ in the parport drivers. (That's why it's so sloow)
+
+ *Add support for other ccd-control chips than the saa7111
+ please send me feedback on what kind of chips you have.
+
+ *Add proper probing. I don't know what's wrong with the IEEE1284
+ parport drivers but (IEEE1284_MODE_NIBBLE|IEEE1284_DEVICE_ID)
+ and nibble read seems to be broken for some peripherals.
+
+ *Add probing for onboard SRAM, port directions etc. (if possible)
+
+ *Add support for the hardware compressed modes (maybe using v4l2)
+
+ *Fix better support for the capture window (no skewed images, v4l
+ interface to capt. window)
+
+ *Probably some bugs that I don't know of
+
+ Please support me by sending feedback!
+
+ Changes:
+
+ Alan Cox: Removed RGB mode for kernel merge, added THIS_MODULE
+ and owner support for newer module locks
+*/
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/delay.h>
+#include <linux/videodev2.h>
+#include <linux/slab.h>
+#include <media/v4l2-common.h>
+#include <media/v4l2-ioctl.h>
+#include <media/v4l2-device.h>
+#include <media/v4l2-fh.h>
+#include <media/v4l2-ctrls.h>
+#include <media/v4l2-event.h>
+#include <linux/parport.h>
+
+/*#define DEBUG*/ /* Undef me for production */
+
+#ifdef DEBUG
+#define DPRINTF(x, a...) printk(KERN_DEBUG "W9966: %s(): "x, __func__ , ##a)
+#else
+#define DPRINTF(x...)
+#endif
+
+/*
+ * Defines, simple typedefs etc.
+ */
+
+#define W9966_DRIVERNAME "W9966CF Webcam"
+#define W9966_MAXCAMS 4 /* Maximum number of cameras */
+#define W9966_RBUFFER 2048 /* Read buffer (must be an even number) */
+#define W9966_SRAMSIZE 131072 /* 128kb */
+#define W9966_SRAMID 0x02 /* check w9966cf.pdf */
+
+/* Empirically determined window limits */
+#define W9966_WND_MIN_X 16
+#define W9966_WND_MIN_Y 14
+#define W9966_WND_MAX_X 705
+#define W9966_WND_MAX_Y 253
+#define W9966_WND_MAX_W (W9966_WND_MAX_X - W9966_WND_MIN_X)
+#define W9966_WND_MAX_H (W9966_WND_MAX_Y - W9966_WND_MIN_Y)
+
+/* Keep track of our current state */
+#define W9966_STATE_PDEV 0x01
+#define W9966_STATE_CLAIMED 0x02
+#define W9966_STATE_VDEV 0x04
+
+#define W9966_I2C_W_ID 0x48
+#define W9966_I2C_R_ID 0x49
+#define W9966_I2C_R_DATA 0x08
+#define W9966_I2C_R_CLOCK 0x04
+#define W9966_I2C_W_DATA 0x02
+#define W9966_I2C_W_CLOCK 0x01
+
+struct w9966 {
+ struct v4l2_device v4l2_dev;
+ struct v4l2_ctrl_handler hdl;
+ unsigned char dev_state;
+ unsigned char i2c_state;
+ unsigned short ppmode;
+ struct parport *pport;
+ struct pardevice *pdev;
+ struct video_device vdev;
+ unsigned short width;
+ unsigned short height;
+ unsigned char brightness;
+ signed char contrast;
+ signed char color;
+ signed char hue;
+ struct mutex lock;
+};
+
+/*
+ * Module specific properties
+ */
+
+MODULE_AUTHOR("Jakob Kemi <jakob.kemi@post.utfors.se>");
+MODULE_DESCRIPTION("Winbond w9966cf WebCam driver (0.32)");
+MODULE_LICENSE("GPL");
+MODULE_VERSION("0.33.1");
+
+#ifdef MODULE
+static char *pardev[] = {[0 ... W9966_MAXCAMS] = ""};
+#else
+static char *pardev[] = {[0 ... W9966_MAXCAMS] = "aggressive"};
+#endif
+module_param_array(pardev, charp, NULL, 0);
+MODULE_PARM_DESC(pardev, "pardev: where to search for\n"
+ "\teach camera. 'aggressive' means brute-force search.\n"
+ "\tEg: >pardev=parport3,aggressive,parport2,parport1< would assign\n"
+ "\tcam 1 to parport3 and search every parport for cam 2 etc...");
+
+static int parmode;
+module_param(parmode, int, 0);
+MODULE_PARM_DESC(parmode, "parmode: transfer mode (0=auto, 1=ecp, 2=epp");
+
+static int video_nr = -1;
+module_param(video_nr, int, 0);
+
+static struct w9966 w9966_cams[W9966_MAXCAMS];
+
+/*
+ * Private function defines
+ */
+
+
+/* Set camera phase flags, so we know what to uninit when terminating */
+static inline void w9966_set_state(struct w9966 *cam, int mask, int val)
+{
+ cam->dev_state = (cam->dev_state & ~mask) ^ val;
+}
+
+/* Get camera phase flags */
+static inline int w9966_get_state(struct w9966 *cam, int mask, int val)
+{
+ return ((cam->dev_state & mask) == val);
+}
+
+/* Claim parport for ourself */
+static void w9966_pdev_claim(struct w9966 *cam)
+{
+ if (w9966_get_state(cam, W9966_STATE_CLAIMED, W9966_STATE_CLAIMED))
+ return;
+ parport_claim_or_block(cam->pdev);
+ w9966_set_state(cam, W9966_STATE_CLAIMED, W9966_STATE_CLAIMED);
+}
+
+/* Release parport for others to use */
+static void w9966_pdev_release(struct w9966 *cam)
+{
+ if (w9966_get_state(cam, W9966_STATE_CLAIMED, 0))
+ return;
+ parport_release(cam->pdev);
+ w9966_set_state(cam, W9966_STATE_CLAIMED, 0);
+}
+
+/* Read register from W9966 interface-chip
+ Expects a claimed pdev
+ -1 on error, else register data (byte) */
+static int w9966_read_reg(struct w9966 *cam, int reg)
+{
+ /* ECP, read, regtransfer, REG, REG, REG, REG, REG */
+ const unsigned char addr = 0x80 | (reg & 0x1f);
+ unsigned char val;
+
+ if (parport_negotiate(cam->pport, cam->ppmode | IEEE1284_ADDR) != 0)
+ return -1;
+ if (parport_write(cam->pport, &addr, 1) != 1)
+ return -1;
+ if (parport_negotiate(cam->pport, cam->ppmode | IEEE1284_DATA) != 0)
+ return -1;
+ if (parport_read(cam->pport, &val, 1) != 1)
+ return -1;
+
+ return val;
+}
+
+/* Write register to W9966 interface-chip
+ Expects a claimed pdev
+ -1 on error */
+static int w9966_write_reg(struct w9966 *cam, int reg, int data)
+{
+ /* ECP, write, regtransfer, REG, REG, REG, REG, REG */
+ const unsigned char addr = 0xc0 | (reg & 0x1f);
+ const unsigned char val = data;
+
+ if (parport_negotiate(cam->pport, cam->ppmode | IEEE1284_ADDR) != 0)
+ return -1;
+ if (parport_write(cam->pport, &addr, 1) != 1)
+ return -1;
+ if (parport_negotiate(cam->pport, cam->ppmode | IEEE1284_DATA) != 0)
+ return -1;
+ if (parport_write(cam->pport, &val, 1) != 1)
+ return -1;
+
+ return 0;
+}
+
+/*
+ * Ugly and primitive i2c protocol functions
+ */
+
+/* Sets the data line on the i2c bus.
+ Expects a claimed pdev. */
+static void w9966_i2c_setsda(struct w9966 *cam, int state)
+{
+ if (state)
+ cam->i2c_state |= W9966_I2C_W_DATA;
+ else
+ cam->i2c_state &= ~W9966_I2C_W_DATA;
+
+ w9966_write_reg(cam, 0x18, cam->i2c_state);
+ udelay(5);
+}
+
+/* Get peripheral clock line
+ Expects a claimed pdev. */
+static int w9966_i2c_getscl(struct w9966 *cam)
+{
+ const unsigned char state = w9966_read_reg(cam, 0x18);
+ return ((state & W9966_I2C_R_CLOCK) > 0);
+}
+
+/* Sets the clock line on the i2c bus.
+ Expects a claimed pdev. -1 on error */
+static int w9966_i2c_setscl(struct w9966 *cam, int state)
+{
+ unsigned long timeout;
+
+ if (state)
+ cam->i2c_state |= W9966_I2C_W_CLOCK;
+ else
+ cam->i2c_state &= ~W9966_I2C_W_CLOCK;
+
+ w9966_write_reg(cam, 0x18, cam->i2c_state);
+ udelay(5);
+
+ /* we go to high, we also expect the peripheral to ack. */
+ if (state) {
+ timeout = jiffies + 100;
+ while (!w9966_i2c_getscl(cam)) {
+ if (time_after(jiffies, timeout))
+ return -1;
+ }
+ }
+ return 0;
+}
+
+#if 0
+/* Get peripheral data line
+ Expects a claimed pdev. */
+static int w9966_i2c_getsda(struct w9966 *cam)
+{
+ const unsigned char state = w9966_read_reg(cam, 0x18);
+ return ((state & W9966_I2C_R_DATA) > 0);
+}
+#endif
+
+/* Write a byte with ack to the i2c bus.
+ Expects a claimed pdev. -1 on error */
+static int w9966_i2c_wbyte(struct w9966 *cam, int data)
+{
+ int i;
+
+ for (i = 7; i >= 0; i--) {
+ w9966_i2c_setsda(cam, (data >> i) & 0x01);
+
+ if (w9966_i2c_setscl(cam, 1) == -1)
+ return -1;
+ w9966_i2c_setscl(cam, 0);
+ }
+
+ w9966_i2c_setsda(cam, 1);
+
+ if (w9966_i2c_setscl(cam, 1) == -1)
+ return -1;
+ w9966_i2c_setscl(cam, 0);
+
+ return 0;
+}
+
+/* Read a data byte with ack from the i2c-bus
+ Expects a claimed pdev. -1 on error */
+#if 0
+static int w9966_i2c_rbyte(struct w9966 *cam)
+{
+ unsigned char data = 0x00;
+ int i;
+
+ w9966_i2c_setsda(cam, 1);
+
+ for (i = 0; i < 8; i++) {
+ if (w9966_i2c_setscl(cam, 1) == -1)
+ return -1;
+ data = data << 1;
+ if (w9966_i2c_getsda(cam))
+ data |= 0x01;
+
+ w9966_i2c_setscl(cam, 0);
+ }
+ return data;
+}
+#endif
+
+/* Read a register from the i2c device.
+ Expects claimed pdev. -1 on error */
+#if 0
+static int w9966_read_reg_i2c(struct w9966 *cam, int reg)
+{
+ int data;
+
+ w9966_i2c_setsda(cam, 0);
+ w9966_i2c_setscl(cam, 0);
+
+ if (w9966_i2c_wbyte(cam, W9966_I2C_W_ID) == -1 ||
+ w9966_i2c_wbyte(cam, reg) == -1)
+ return -1;
+
+ w9966_i2c_setsda(cam, 1);
+ if (w9966_i2c_setscl(cam, 1) == -1)
+ return -1;
+ w9966_i2c_setsda(cam, 0);
+ w9966_i2c_setscl(cam, 0);
+
+ if (w9966_i2c_wbyte(cam, W9966_I2C_R_ID) == -1)
+ return -1;
+ data = w9966_i2c_rbyte(cam);
+ if (data == -1)
+ return -1;
+
+ w9966_i2c_setsda(cam, 0);
+
+ if (w9966_i2c_setscl(cam, 1) == -1)
+ return -1;
+ w9966_i2c_setsda(cam, 1);
+
+ return data;
+}
+#endif
+
+/* Write a register to the i2c device.
+ Expects claimed pdev. -1 on error */
+static int w9966_write_reg_i2c(struct w9966 *cam, int reg, int data)
+{
+ w9966_i2c_setsda(cam, 0);
+ w9966_i2c_setscl(cam, 0);
+
+ if (w9966_i2c_wbyte(cam, W9966_I2C_W_ID) == -1 ||
+ w9966_i2c_wbyte(cam, reg) == -1 ||
+ w9966_i2c_wbyte(cam, data) == -1)
+ return -1;
+
+ w9966_i2c_setsda(cam, 0);
+ if (w9966_i2c_setscl(cam, 1) == -1)
+ return -1;
+
+ w9966_i2c_setsda(cam, 1);
+
+ return 0;
+}
+
+/* Find a good length for capture window (used both for W and H)
+ A bit ugly but pretty functional. The capture length
+ have to match the downscale */
+static int w9966_findlen(int near, int size, int maxlen)
+{
+ int bestlen = size;
+ int besterr = abs(near - bestlen);
+ int len;
+
+ for (len = size + 1; len < maxlen; len++) {
+ int err;
+ if (((64 * size) % len) != 0)
+ continue;
+
+ err = abs(near - len);
+
+ /* Only continue as long as we keep getting better values */
+ if (err > besterr)
+ break;
+
+ besterr = err;
+ bestlen = len;
+ }
+
+ return bestlen;
+}
+
+/* Modify capture window (if necessary)
+ and calculate downscaling
+ Return -1 on error */
+static int w9966_calcscale(int size, int min, int max, int *beg, int *end, unsigned char *factor)
+{
+ int maxlen = max - min;
+ int len = *end - *beg + 1;
+ int newlen = w9966_findlen(len, size, maxlen);
+ int err = newlen - len;
+
+ /* Check for bad format */
+ if (newlen > maxlen || newlen < size)
+ return -1;
+
+ /* Set factor (6 bit fixed) */
+ *factor = (64 * size) / newlen;
+ if (*factor == 64)
+ *factor = 0x00; /* downscale is disabled */
+ else
+ *factor |= 0x80; /* set downscale-enable bit */
+
+ /* Modify old beginning and end */
+ *beg -= err / 2;
+ *end += err - (err / 2);
+
+ /* Move window if outside borders */
+ if (*beg < min) {
+ *end += min - *beg;
+ *beg += min - *beg;
+ }
+ if (*end > max) {
+ *beg -= *end - max;
+ *end -= *end - max;
+ }
+
+ return 0;
+}
+
+/* Setup the cameras capture window etc.
+ Expects a claimed pdev
+ return -1 on error */
+static int w9966_setup(struct w9966 *cam, int x1, int y1, int x2, int y2, int w, int h)
+{
+ unsigned int i;
+ unsigned int enh_s, enh_e;
+ unsigned char scale_x, scale_y;
+ unsigned char regs[0x1c];
+ unsigned char saa7111_regs[] = {
+ 0x21, 0x00, 0xd8, 0x23, 0x00, 0x80, 0x80, 0x00,
+ 0x88, 0x10, 0x80, 0x40, 0x40, 0x00, 0x01, 0x00,
+ 0x48, 0x0c, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x71, 0xe7, 0x00, 0x00, 0xc0
+ };
+
+
+ if (w * h * 2 > W9966_SRAMSIZE) {
+ DPRINTF("capture window exceeds SRAM size!.\n");
+ w = 200; h = 160; /* Pick default values */
+ }
+
+ w &= ~0x1;
+ if (w < 2)
+ w = 2;
+ if (h < 1)
+ h = 1;
+ if (w > W9966_WND_MAX_W)
+ w = W9966_WND_MAX_W;
+ if (h > W9966_WND_MAX_H)
+ h = W9966_WND_MAX_H;
+
+ cam->width = w;
+ cam->height = h;
+
+ enh_s = 0;
+ enh_e = w * h * 2;
+
+ /* Modify capture window if necessary and calculate downscaling */
+ if (w9966_calcscale(w, W9966_WND_MIN_X, W9966_WND_MAX_X, &x1, &x2, &scale_x) != 0 ||
+ w9966_calcscale(h, W9966_WND_MIN_Y, W9966_WND_MAX_Y, &y1, &y2, &scale_y) != 0)
+ return -1;
+
+ DPRINTF("%dx%d, x: %d<->%d, y: %d<->%d, sx: %d/64, sy: %d/64.\n",
+ w, h, x1, x2, y1, y2, scale_x & ~0x80, scale_y & ~0x80);
+
+ /* Setup registers */
+ regs[0x00] = 0x00; /* Set normal operation */
+ regs[0x01] = 0x18; /* Capture mode */
+ regs[0x02] = scale_y; /* V-scaling */
+ regs[0x03] = scale_x; /* H-scaling */
+
+ /* Capture window */
+ regs[0x04] = (x1 & 0x0ff); /* X-start (8 low bits) */
+ regs[0x05] = (x1 & 0x300)>>8; /* X-start (2 high bits) */
+ regs[0x06] = (y1 & 0x0ff); /* Y-start (8 low bits) */
+ regs[0x07] = (y1 & 0x300)>>8; /* Y-start (2 high bits) */
+ regs[0x08] = (x2 & 0x0ff); /* X-end (8 low bits) */
+ regs[0x09] = (x2 & 0x300)>>8; /* X-end (2 high bits) */
+ regs[0x0a] = (y2 & 0x0ff); /* Y-end (8 low bits) */
+
+ regs[0x0c] = W9966_SRAMID; /* SRAM-banks (1x 128kb) */
+
+ /* Enhancement layer */
+ regs[0x0d] = (enh_s & 0x000ff); /* Enh. start (0-7) */
+ regs[0x0e] = (enh_s & 0x0ff00) >> 8; /* Enh. start (8-15) */
+ regs[0x0f] = (enh_s & 0x70000) >> 16; /* Enh. start (16-17/18??) */
+ regs[0x10] = (enh_e & 0x000ff); /* Enh. end (0-7) */
+ regs[0x11] = (enh_e & 0x0ff00) >> 8; /* Enh. end (8-15) */
+ regs[0x12] = (enh_e & 0x70000) >> 16; /* Enh. end (16-17/18??) */
+
+ /* Misc */
+ regs[0x13] = 0x40; /* VEE control (raw 4:2:2) */
+ regs[0x17] = 0x00; /* ??? */
+ regs[0x18] = cam->i2c_state = 0x00; /* Serial bus */
+ regs[0x19] = 0xff; /* I/O port direction control */
+ regs[0x1a] = 0xff; /* I/O port data register */
+ regs[0x1b] = 0x10; /* ??? */
+
+ /* SAA7111 chip settings */
+ saa7111_regs[0x0a] = cam->brightness;
+ saa7111_regs[0x0b] = cam->contrast;
+ saa7111_regs[0x0c] = cam->color;
+ saa7111_regs[0x0d] = cam->hue;
+
+ /* Reset (ECP-fifo & serial-bus) */
+ if (w9966_write_reg(cam, 0x00, 0x03) == -1)
+ return -1;
+
+ /* Write regs to w9966cf chip */
+ for (i = 0; i < 0x1c; i++)
+ if (w9966_write_reg(cam, i, regs[i]) == -1)
+ return -1;
+
+ /* Write regs to saa7111 chip */
+ for (i = 0; i < 0x20; i++)
+ if (w9966_write_reg_i2c(cam, i, saa7111_regs[i]) == -1)
+ return -1;
+
+ return 0;
+}
+
+/*
+ * Video4linux interfacing
+ */
+
+static int cam_querycap(struct file *file, void *priv,
+ struct v4l2_capability *vcap)
+{
+ struct w9966 *cam = video_drvdata(file);
+
+ strlcpy(vcap->driver, cam->v4l2_dev.name, sizeof(vcap->driver));
+ strlcpy(vcap->card, W9966_DRIVERNAME, sizeof(vcap->card));
+ strlcpy(vcap->bus_info, "parport", sizeof(vcap->bus_info));
+ vcap->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_READWRITE;
+ vcap->capabilities = vcap->device_caps | V4L2_CAP_DEVICE_CAPS;
+ return 0;
+}
+
+static int cam_enum_input(struct file *file, void *fh, struct v4l2_input *vin)
+{
+ if (vin->index > 0)
+ return -EINVAL;
+ strlcpy(vin->name, "Camera", sizeof(vin->name));
+ vin->type = V4L2_INPUT_TYPE_CAMERA;
+ vin->audioset = 0;
+ vin->tuner = 0;
+ vin->std = 0;
+ vin->status = 0;
+ return 0;
+}
+
+static int cam_g_input(struct file *file, void *fh, unsigned int *inp)
+{
+ *inp = 0;
+ return 0;
+}
+
+static int cam_s_input(struct file *file, void *fh, unsigned int inp)
+{
+ return (inp > 0) ? -EINVAL : 0;
+}
+
+static int cam_s_ctrl(struct v4l2_ctrl *ctrl)
+{
+ struct w9966 *cam =
+ container_of(ctrl->handler, struct w9966, hdl);
+ int ret = 0;
+
+ mutex_lock(&cam->lock);
+ switch (ctrl->id) {
+ case V4L2_CID_BRIGHTNESS:
+ cam->brightness = ctrl->val;
+ break;
+ case V4L2_CID_CONTRAST:
+ cam->contrast = ctrl->val;
+ break;
+ case V4L2_CID_SATURATION:
+ cam->color = ctrl->val;
+ break;
+ case V4L2_CID_HUE:
+ cam->hue = ctrl->val;
+ break;
+ default:
+ ret = -EINVAL;
+ break;
+ }
+
+ if (ret == 0) {
+ w9966_pdev_claim(cam);
+
+ if (w9966_write_reg_i2c(cam, 0x0a, cam->brightness) == -1 ||
+ w9966_write_reg_i2c(cam, 0x0b, cam->contrast) == -1 ||
+ w9966_write_reg_i2c(cam, 0x0c, cam->color) == -1 ||
+ w9966_write_reg_i2c(cam, 0x0d, cam->hue) == -1) {
+ ret = -EIO;
+ }
+
+ w9966_pdev_release(cam);
+ }
+ mutex_unlock(&cam->lock);
+ return ret;
+}
+
+static int cam_g_fmt_vid_cap(struct file *file, void *fh, struct v4l2_format *fmt)
+{
+ struct w9966 *cam = video_drvdata(file);
+ struct v4l2_pix_format *pix = &fmt->fmt.pix;
+
+ pix->width = cam->width;
+ pix->height = cam->height;
+ pix->pixelformat = V4L2_PIX_FMT_YUYV;
+ pix->field = V4L2_FIELD_NONE;
+ pix->bytesperline = 2 * cam->width;
+ pix->sizeimage = 2 * cam->width * cam->height;
+ /* Just a guess */
+ pix->colorspace = V4L2_COLORSPACE_SMPTE170M;
+ return 0;
+}
+
+static int cam_try_fmt_vid_cap(struct file *file, void *fh, struct v4l2_format *fmt)
+{
+ struct v4l2_pix_format *pix = &fmt->fmt.pix;
+
+ if (pix->width < 2)
+ pix->width = 2;
+ if (pix->height < 1)
+ pix->height = 1;
+ if (pix->width > W9966_WND_MAX_W)
+ pix->width = W9966_WND_MAX_W;
+ if (pix->height > W9966_WND_MAX_H)
+ pix->height = W9966_WND_MAX_H;
+ pix->pixelformat = V4L2_PIX_FMT_YUYV;
+ pix->field = V4L2_FIELD_NONE;
+ pix->bytesperline = 2 * pix->width;
+ pix->sizeimage = 2 * pix->width * pix->height;
+ /* Just a guess */
+ pix->colorspace = V4L2_COLORSPACE_SMPTE170M;
+ return 0;
+}
+
+static int cam_s_fmt_vid_cap(struct file *file, void *fh, struct v4l2_format *fmt)
+{
+ struct w9966 *cam = video_drvdata(file);
+ struct v4l2_pix_format *pix = &fmt->fmt.pix;
+ int ret = cam_try_fmt_vid_cap(file, fh, fmt);
+
+ if (ret)
+ return ret;
+
+ mutex_lock(&cam->lock);
+ /* Update camera regs */
+ w9966_pdev_claim(cam);
+ ret = w9966_setup(cam, 0, 0, 1023, 1023, pix->width, pix->height);
+ w9966_pdev_release(cam);
+ mutex_unlock(&cam->lock);
+ return ret;
+}
+
+static int cam_enum_fmt_vid_cap(struct file *file, void *fh, struct v4l2_fmtdesc *fmt)
+{
+ static struct v4l2_fmtdesc formats[] = {
+ { 0, 0, 0,
+ "YUV 4:2:2", V4L2_PIX_FMT_YUYV,
+ { 0, 0, 0, 0 }
+ },
+ };
+ enum v4l2_buf_type type = fmt->type;
+
+ if (fmt->index > 0)
+ return -EINVAL;
+
+ *fmt = formats[fmt->index];
+ fmt->type = type;
+ return 0;
+}
+
+/* Capture data */
+static ssize_t w9966_v4l_read(struct file *file, char __user *buf,
+ size_t count, loff_t *ppos)
+{
+ struct w9966 *cam = video_drvdata(file);
+ unsigned char addr = 0xa0; /* ECP, read, CCD-transfer, 00000 */
+ unsigned char __user *dest = (unsigned char __user *)buf;
+ unsigned long dleft = count;
+ unsigned char *tbuf;
+
+ /* Why would anyone want more than this?? */
+ if (count > cam->width * cam->height * 2)
+ return -EINVAL;
+
+ mutex_lock(&cam->lock);
+ w9966_pdev_claim(cam);
+ w9966_write_reg(cam, 0x00, 0x02); /* Reset ECP-FIFO buffer */
+ w9966_write_reg(cam, 0x00, 0x00); /* Return to normal operation */
+ w9966_write_reg(cam, 0x01, 0x98); /* Enable capture */
+
+ /* write special capture-addr and negotiate into data transfer */
+ if ((parport_negotiate(cam->pport, cam->ppmode|IEEE1284_ADDR) != 0) ||
+ (parport_write(cam->pport, &addr, 1) != 1) ||
+ (parport_negotiate(cam->pport, cam->ppmode|IEEE1284_DATA) != 0)) {
+ w9966_pdev_release(cam);
+ mutex_unlock(&cam->lock);
+ return -EFAULT;
+ }
+
+ tbuf = kmalloc(W9966_RBUFFER, GFP_KERNEL);
+ if (tbuf == NULL) {
+ count = -ENOMEM;
+ goto out;
+ }
+
+ while (dleft > 0) {
+ unsigned long tsize = (dleft > W9966_RBUFFER) ? W9966_RBUFFER : dleft;
+
+ if (parport_read(cam->pport, tbuf, tsize) < tsize) {
+ count = -EFAULT;
+ goto out;
+ }
+ if (copy_to_user(dest, tbuf, tsize) != 0) {
+ count = -EFAULT;
+ goto out;
+ }
+ dest += tsize;
+ dleft -= tsize;
+ }
+
+ w9966_write_reg(cam, 0x01, 0x18); /* Disable capture */
+
+out:
+ kfree(tbuf);
+ w9966_pdev_release(cam);
+ mutex_unlock(&cam->lock);
+
+ return count;
+}
+
+static const struct v4l2_file_operations w9966_fops = {
+ .owner = THIS_MODULE,
+ .open = v4l2_fh_open,
+ .release = v4l2_fh_release,
+ .poll = v4l2_ctrl_poll,
+ .unlocked_ioctl = video_ioctl2,
+ .read = w9966_v4l_read,
+};
+
+static const struct v4l2_ioctl_ops w9966_ioctl_ops = {
+ .vidioc_querycap = cam_querycap,
+ .vidioc_g_input = cam_g_input,
+ .vidioc_s_input = cam_s_input,
+ .vidioc_enum_input = cam_enum_input,
+ .vidioc_enum_fmt_vid_cap = cam_enum_fmt_vid_cap,
+ .vidioc_g_fmt_vid_cap = cam_g_fmt_vid_cap,
+ .vidioc_s_fmt_vid_cap = cam_s_fmt_vid_cap,
+ .vidioc_try_fmt_vid_cap = cam_try_fmt_vid_cap,
+ .vidioc_log_status = v4l2_ctrl_log_status,
+ .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
+ .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
+};
+
+static const struct v4l2_ctrl_ops cam_ctrl_ops = {
+ .s_ctrl = cam_s_ctrl,
+};
+
+
+/* Initialize camera device. Setup all internal flags, set a
+ default video mode, setup ccd-chip, register v4l device etc..
+ Also used for 'probing' of hardware.
+ -1 on error */
+static int w9966_init(struct w9966 *cam, struct parport *port)
+{
+ struct v4l2_device *v4l2_dev = &cam->v4l2_dev;
+
+ if (cam->dev_state != 0)
+ return -1;
+
+ strlcpy(v4l2_dev->name, "w9966", sizeof(v4l2_dev->name));
+
+ if (v4l2_device_register(NULL, v4l2_dev) < 0) {
+ v4l2_err(v4l2_dev, "Could not register v4l2_device\n");
+ return -1;
+ }
+
+ v4l2_ctrl_handler_init(&cam->hdl, 4);
+ v4l2_ctrl_new_std(&cam->hdl, &cam_ctrl_ops,
+ V4L2_CID_BRIGHTNESS, 0, 255, 1, 128);
+ v4l2_ctrl_new_std(&cam->hdl, &cam_ctrl_ops,
+ V4L2_CID_CONTRAST, -64, 64, 1, 64);
+ v4l2_ctrl_new_std(&cam->hdl, &cam_ctrl_ops,
+ V4L2_CID_SATURATION, -64, 64, 1, 64);
+ v4l2_ctrl_new_std(&cam->hdl, &cam_ctrl_ops,
+ V4L2_CID_HUE, -128, 127, 1, 0);
+ if (cam->hdl.error) {
+ v4l2_err(v4l2_dev, "couldn't register controls\n");
+ return -1;
+ }
+ cam->pport = port;
+ cam->brightness = 128;
+ cam->contrast = 64;
+ cam->color = 64;
+ cam->hue = 0;
+
+ /* Select requested transfer mode */
+ switch (parmode) {
+ default: /* Auto-detect (priority: hw-ecp, hw-epp, sw-ecp) */
+ case 0:
+ if (port->modes & PARPORT_MODE_ECP)
+ cam->ppmode = IEEE1284_MODE_ECP;
+ else if (port->modes & PARPORT_MODE_EPP)
+ cam->ppmode = IEEE1284_MODE_EPP;
+ else
+ cam->ppmode = IEEE1284_MODE_ECP;
+ break;
+ case 1: /* hw- or sw-ecp */
+ cam->ppmode = IEEE1284_MODE_ECP;
+ break;
+ case 2: /* hw- or sw-epp */
+ cam->ppmode = IEEE1284_MODE_EPP;
+ break;
+ }
+
+ /* Tell the parport driver that we exists */
+ cam->pdev = parport_register_device(port, "w9966", NULL, NULL, NULL, 0, NULL);
+ if (cam->pdev == NULL) {
+ DPRINTF("parport_register_device() failed\n");
+ return -1;
+ }
+ w9966_set_state(cam, W9966_STATE_PDEV, W9966_STATE_PDEV);
+
+ w9966_pdev_claim(cam);
+
+ /* Setup a default capture mode */
+ if (w9966_setup(cam, 0, 0, 1023, 1023, 200, 160) != 0) {
+ DPRINTF("w9966_setup() failed.\n");
+ return -1;
+ }
+
+ w9966_pdev_release(cam);
+
+ /* Fill in the video_device struct and register us to v4l */
+ strlcpy(cam->vdev.name, W9966_DRIVERNAME, sizeof(cam->vdev.name));
+ cam->vdev.v4l2_dev = v4l2_dev;
+ cam->vdev.fops = &w9966_fops;
+ cam->vdev.ioctl_ops = &w9966_ioctl_ops;
+ cam->vdev.release = video_device_release_empty;
+ cam->vdev.ctrl_handler = &cam->hdl;
+ set_bit(V4L2_FL_USE_FH_PRIO, &cam->vdev.flags);
+ video_set_drvdata(&cam->vdev, cam);
+
+ mutex_init(&cam->lock);
+
+ if (video_register_device(&cam->vdev, VFL_TYPE_GRABBER, video_nr) < 0)
+ return -1;
+
+ w9966_set_state(cam, W9966_STATE_VDEV, W9966_STATE_VDEV);
+
+ /* All ok */
+ v4l2_info(v4l2_dev, "Found and initialized a webcam on %s.\n",
+ cam->pport->name);
+ return 0;
+}
+
+
+/* Terminate everything gracefully */
+static void w9966_term(struct w9966 *cam)
+{
+ /* Unregister from v4l */
+ if (w9966_get_state(cam, W9966_STATE_VDEV, W9966_STATE_VDEV)) {
+ video_unregister_device(&cam->vdev);
+ w9966_set_state(cam, W9966_STATE_VDEV, 0);
+ }
+
+ v4l2_ctrl_handler_free(&cam->hdl);
+
+ /* Terminate from IEEE1284 mode and release pdev block */
+ if (w9966_get_state(cam, W9966_STATE_PDEV, W9966_STATE_PDEV)) {
+ w9966_pdev_claim(cam);
+ parport_negotiate(cam->pport, IEEE1284_MODE_COMPAT);
+ w9966_pdev_release(cam);
+ }
+
+ /* Unregister from parport */
+ if (w9966_get_state(cam, W9966_STATE_PDEV, W9966_STATE_PDEV)) {
+ parport_unregister_device(cam->pdev);
+ w9966_set_state(cam, W9966_STATE_PDEV, 0);
+ }
+ memset(cam, 0, sizeof(*cam));
+}
+
+
+/* Called once for every parport on init */
+static void w9966_attach(struct parport *port)
+{
+ int i;
+
+ for (i = 0; i < W9966_MAXCAMS; i++) {
+ if (w9966_cams[i].dev_state != 0) /* Cam is already assigned */
+ continue;
+ if (strcmp(pardev[i], "aggressive") == 0 || strcmp(pardev[i], port->name) == 0) {
+ if (w9966_init(&w9966_cams[i], port) != 0)
+ w9966_term(&w9966_cams[i]);
+ break; /* return */
+ }
+ }
+}
+
+/* Called once for every parport on termination */
+static void w9966_detach(struct parport *port)
+{
+ int i;
+
+ for (i = 0; i < W9966_MAXCAMS; i++)
+ if (w9966_cams[i].dev_state != 0 && w9966_cams[i].pport == port)
+ w9966_term(&w9966_cams[i]);
+}
+
+
+static struct parport_driver w9966_ppd = {
+ .name = W9966_DRIVERNAME,
+ .attach = w9966_attach,
+ .detach = w9966_detach,
+};
+
+/* Module entry point */
+static int __init w9966_mod_init(void)
+{
+ int i;
+
+ for (i = 0; i < W9966_MAXCAMS; i++)
+ w9966_cams[i].dev_state = 0;
+
+ return parport_register_driver(&w9966_ppd);
+}
+
+/* Module cleanup */
+static void __exit w9966_mod_term(void)
+{
+ parport_unregister_driver(&w9966_ppd);
+}
+
+module_init(w9966_mod_init);
+module_exit(w9966_mod_term);