V4L/DVB (10366): gspca - mr97310a: New subdriver.

This patch adds support for USB webcams based on the MR97310A chip. It was
tested with an Aiptek PenCam VGA+ webcam.

Signed-off-by: Kyle Guinn <elyk03@gmail.com>
Signed-off-by: Jean-Francois Moine <moinejf@free.fr>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

1 files changed, 378 insertions, 0 deletions

diff --git a/drivers/media/video/gspca/mr97310a.c b/drivers/media/video/gspca/mr97310a.c
new file mode 100644
index 000000000000..24180bf0cdab
--- /dev/null
+++ b/drivers/media/video/gspca/mr97310a.c
@@ -0,0 +1,378 @@
+/*
+ * Mars MR97310A library
+ *
+ * Copyright (C) 2009 Kyle Guinn <elyk03@gmail.com>
+ *
+ * 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
+ * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#define MODULE_NAME "mr97310a"
+
+#include "gspca.h"
+
+MODULE_AUTHOR("Kyle Guinn <elyk03@gmail.com>");
+MODULE_DESCRIPTION("GSPCA/Mars-Semi MR97310A USB Camera Driver");
+MODULE_LICENSE("GPL");
+
+/* specific webcam descriptor */
+struct sd {
+        struct gspca_dev gspca_dev;  /* !! must be the first item */
+
+        u8 sof_read;
+        u8 header_read;
+};
+
+/* V4L2 controls supported by the driver */
+static struct ctrl sd_ctrls[] = {
+};
+
+static const struct v4l2_pix_format vga_mode[] = {
+        {160, 120, V4L2_PIX_FMT_MR97310A, V4L2_FIELD_NONE,
+                .bytesperline = 160,
+                .sizeimage = 160 * 120,
+                .colorspace = V4L2_COLORSPACE_SRGB,
+                .priv = 4},
+        {176, 144, V4L2_PIX_FMT_MR97310A, V4L2_FIELD_NONE,
+                .bytesperline = 176,
+                .sizeimage = 176 * 144,
+                .colorspace = V4L2_COLORSPACE_SRGB,
+                .priv = 3},
+        {320, 240, V4L2_PIX_FMT_MR97310A, V4L2_FIELD_NONE,
+                .bytesperline = 320,
+                .sizeimage = 320 * 240,
+                .colorspace = V4L2_COLORSPACE_SRGB,
+                .priv = 2},
+        {352, 288, V4L2_PIX_FMT_MR97310A, V4L2_FIELD_NONE,
+                .bytesperline = 352,
+                .sizeimage = 352 * 288,
+                .colorspace = V4L2_COLORSPACE_SRGB,
+                .priv = 1},
+        {640, 480, V4L2_PIX_FMT_MR97310A, V4L2_FIELD_NONE,
+                .bytesperline = 640,
+                .sizeimage = 640 * 480,
+                .colorspace = V4L2_COLORSPACE_SRGB,
+                .priv = 0},
+};
+
+/* the bytes to write are in gspca_dev->usb_buf */
+static int reg_w(struct gspca_dev *gspca_dev, int len)
+{
+        int rc;
+
+        rc = usb_bulk_msg(gspca_dev->dev,
+                          usb_sndbulkpipe(gspca_dev->dev, 4),
+                          gspca_dev->usb_buf, len, 0, 500);
+        if (rc < 0)
+                PDEBUG(D_ERR, "reg write [%02x] error %d",
+                       gspca_dev->usb_buf[0], rc);
+        return rc;
+}
+
+/* this function is called at probe time */
+static int sd_config(struct gspca_dev *gspca_dev,
+                     const struct usb_device_id *id)
+{
+        struct cam *cam;
+
+        cam = &gspca_dev->cam;
+        cam->cam_mode = vga_mode;
+        cam->nmodes = ARRAY_SIZE(vga_mode);
+        return 0;
+}
+
+/* this function is called at probe and resume time */
+static int sd_init(struct gspca_dev *gspca_dev)
+{
+        return 0;
+}
+
+static int sd_start(struct gspca_dev *gspca_dev)
+{
+        struct sd *sd = (struct sd *) gspca_dev;
+        __u8 *data = gspca_dev->usb_buf;
+        int err_code;
+
+        sd->sof_read = 0;
+
+        /* Note:  register descriptions guessed from MR97113A driver */
+
+        data[0] = 0x01;
+        data[1] = 0x01;
+        err_code = reg_w(gspca_dev, 2);
+        if (err_code < 0)
+                return err_code;
+
+        data[0] = 0x00;
+        data[1] = 0x0d;
+        data[2] = 0x01;
+        data[5] = 0x2b;
+        data[7] = 0x00;
+        data[9] = 0x50;  /* reg 8, no scale down */
+        data[10] = 0xc0;
+
+        switch (gspca_dev->width) {
+        case 160:
+                data[9] |= 0x0c;  /* reg 8, 4:1 scale down */
+                /* fall thru */
+        case 320:
+                data[9] |= 0x04;  /* reg 8, 2:1 scale down */
+                /* fall thru */
+        case 640:
+        default:
+                data[3] = 0x50;  /* reg 2, H size */
+                data[4] = 0x78;  /* reg 3, V size */
+                data[6] = 0x04;  /* reg 5, H start */
+                data[8] = 0x03;  /* reg 7, V start */
+                break;
+
+        case 176:
+                data[9] |= 0x04;  /* reg 8, 2:1 scale down */
+                /* fall thru */
+        case 352:
+                data[3] = 0x2c;  /* reg 2, H size */
+                data[4] = 0x48;  /* reg 3, V size */
+                data[6] = 0x94;  /* reg 5, H start */
+                data[8] = 0x63;  /* reg 7, V start */
+                break;
+        }
+
+        err_code = reg_w(gspca_dev, 11);
+        if (err_code < 0)
+                return err_code;
+
+        data[0] = 0x0a;
+        data[1] = 0x80;
+        err_code = reg_w(gspca_dev, 2);
+        if (err_code < 0)
+                return err_code;
+
+        data[0] = 0x14;
+        data[1] = 0x0a;
+        err_code = reg_w(gspca_dev, 2);
+        if (err_code < 0)
+                return err_code;
+
+        data[0] = 0x1b;
+        data[1] = 0x00;
+        err_code = reg_w(gspca_dev, 2);
+        if (err_code < 0)
+                return err_code;
+
+        data[0] = 0x15;
+        data[1] = 0x16;
+        err_code = reg_w(gspca_dev, 2);
+        if (err_code < 0)
+                return err_code;
+
+        data[0] = 0x16;
+        data[1] = 0x10;
+        err_code = reg_w(gspca_dev, 2);
+        if (err_code < 0)
+                return err_code;
+
+        data[0] = 0x17;
+        data[1] = 0x3a;
+        err_code = reg_w(gspca_dev, 2);
+        if (err_code < 0)
+                return err_code;
+
+        data[0] = 0x18;
+        data[1] = 0x68;
+        err_code = reg_w(gspca_dev, 2);
+        if (err_code < 0)
+                return err_code;
+
+        data[0] = 0x1f;
+        data[1] = 0x00;
+        data[2] = 0x02;
+        data[3] = 0x06;
+        data[4] = 0x59;
+        data[5] = 0x0c;
+        data[6] = 0x16;
+        data[7] = 0x00;
+        data[8] = 0x07;
+        data[9] = 0x00;
+        data[10] = 0x01;
+        err_code = reg_w(gspca_dev, 11);
+        if (err_code < 0)
+                return err_code;
+
+        data[0] = 0x1f;
+        data[1] = 0x04;
+        data[2] = 0x11;
+        data[3] = 0x01;
+        err_code = reg_w(gspca_dev, 4);
+        if (err_code < 0)
+                return err_code;
+
+        data[0] = 0x1f;
+        data[1] = 0x00;
+        data[2] = 0x0a;
+        data[3] = 0x00;
+        data[4] = 0x01;
+        data[5] = 0x00;
+        data[6] = 0x00;
+        data[7] = 0x01;
+        data[8] = 0x00;
+        data[9] = 0x0a;
+        err_code = reg_w(gspca_dev, 10);
+        if (err_code < 0)
+                return err_code;
+
+        data[0] = 0x1f;
+        data[1] = 0x04;
+        data[2] = 0x11;
+        data[3] = 0x01;
+        err_code = reg_w(gspca_dev, 4);
+        if (err_code < 0)
+                return err_code;
+
+        data[0] = 0x1f;
+        data[1] = 0x00;
+        data[2] = 0x12;
+        data[3] = 0x00;
+        data[4] = 0x63;
+        data[5] = 0x00;
+        data[6] = 0x70;
+        data[7] = 0x00;
+        data[8] = 0x01;
+        err_code = reg_w(gspca_dev, 10);
+        if (err_code < 0)
+                return err_code;
+
+        data[0] = 0x1f;
+        data[1] = 0x04;
+        data[2] = 0x11;
+        data[3] = 0x01;
+        err_code = reg_w(gspca_dev, 4);
+        if (err_code < 0)
+                return err_code;
+
+        data[0] = 0x00;
+        data[1] = 0x4d;  /* ISOC transfering enable... */
+        err_code = reg_w(gspca_dev, 2);
+        return err_code;
+}
+
+static void sd_stopN(struct gspca_dev *gspca_dev)
+{
+        int result;
+
+        gspca_dev->usb_buf[0] = 1;
+        gspca_dev->usb_buf[1] = 0;
+        result = reg_w(gspca_dev, 2);
+        if (result < 0)
+                PDEBUG(D_ERR, "Camera Stop failed");
+}
+
+/* Include pac common sof detection functions */
+#include "pac_common.h"
+
+static void sd_pkt_scan(struct gspca_dev *gspca_dev,
+                        struct gspca_frame *frame,    /* target */
+                        __u8 *data,                   /* isoc packet */
+                        int len)                      /* iso packet length */
+{
+        struct sd *sd = (struct sd *) gspca_dev;
+        unsigned char *sof;
+
+        sof = pac_find_sof(gspca_dev, data, len);
+        if (sof) {
+                int n;
+
+                /* finish decoding current frame */
+                n = sof - data;
+                if (n > sizeof pac_sof_marker)
+                        n -= sizeof pac_sof_marker;
+                else
+                        n = 0;
+                frame = gspca_frame_add(gspca_dev, LAST_PACKET, frame,
+                                        data, n);
+                sd->header_read = 0;
+                gspca_frame_add(gspca_dev, FIRST_PACKET, frame, NULL, 0);
+                len -= sof - data;
+                data = sof;
+        }
+        if (sd->header_read < 7) {
+                int needed;
+
+                /* skip the rest of the header */
+                needed = 7 - sd->header_read;
+                if (len <= needed) {
+                        sd->header_read += len;
+                        return;
+                }
+                data += needed;
+                len -= needed;
+                sd->header_read = 7;
+        }
+
+        gspca_frame_add(gspca_dev, INTER_PACKET, frame, data, len);
+}
+
+/* sub-driver description */
+static const struct sd_desc sd_desc = {
+        .name = MODULE_NAME,
+        .ctrls = sd_ctrls,
+        .nctrls = ARRAY_SIZE(sd_ctrls),
+        .config = sd_config,
+        .init = sd_init,
+        .start = sd_start,
+        .stopN = sd_stopN,
+        .pkt_scan = sd_pkt_scan,
+};
+
+/* -- module initialisation -- */
+static const __devinitdata struct usb_device_id device_table[] = {
+        {USB_DEVICE(0x08ca, 0x0111)},
+        {}
+};
+MODULE_DEVICE_TABLE(usb, device_table);
+
+/* -- device connect -- */
+static int sd_probe(struct usb_interface *intf,
+                    const struct usb_device_id *id)
+{
+        return gspca_dev_probe(intf, id, &sd_desc, sizeof(struct sd),
+                               THIS_MODULE);
+}
+
+static struct usb_driver sd_driver = {
+        .name = MODULE_NAME,
+        .id_table = device_table,
+        .probe = sd_probe,
+        .disconnect = gspca_disconnect,
+#ifdef CONFIG_PM
+        .suspend = gspca_suspend,
+        .resume = gspca_resume,
+#endif
+};
+
+/* -- module insert / remove -- */
+static int __init sd_mod_init(void)
+{
+        if (usb_register(&sd_driver) < 0)
+                return -1;
+        PDEBUG(D_PROBE, "registered");
+        return 0;
+}
+static void __exit sd_mod_exit(void)
+{
+        usb_deregister(&sd_driver);
+        PDEBUG(D_PROBE, "deregistered");
+}
+
+module_init(sd_mod_init);
+module_exit(sd_mod_exit);