--- /dev/null
+ /*
+ * USB Driver for ALi m5602 based webcams
+ *
+ * Copyright (C) 2008 Erik Andrén
+ * Copyright (C) 2007 Ilyes Gouta. Based on the m5603x Linux Driver Project.
+ * Copyright (C) 2005 m5603x Linux Driver Project <m5602@x3ng.com.br>
+ *
+ * Portions of code to USB interface and ALi driver software,
+ * Copyright (c) 2006 Willem Duinker
+ * v4l2 interface modeled after the V4L2 driver
+ * for SN9C10x PC Camera Controllers
+ *
+ * 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, version 2.
+ *
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include "m5602_ov9650.h"
+#include "m5602_ov7660.h"
+#include "m5602_mt9m111.h"
+#include "m5602_po1030.h"
+#include "m5602_s5k83a.h"
+#include "m5602_s5k4aa.h"
+
+/* Kernel module parameters */
+int force_sensor;
+static bool dump_bridge;
+bool dump_sensor;
+
+static const struct usb_device_id m5602_table[] = {
+ {USB_DEVICE(0x0402, 0x5602)},
+ {}
+};
+
+MODULE_DEVICE_TABLE(usb, m5602_table);
+
+/* Reads a byte from the m5602 */
+int m5602_read_bridge(struct sd *sd, const u8 address, u8 *i2c_data)
+{
+ int err;
+ struct gspca_dev *gspca_dev = (struct gspca_dev *) sd;
+ struct usb_device *udev = sd->gspca_dev.dev;
+ __u8 *buf = sd->gspca_dev.usb_buf;
+
+ err = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
+ 0x04, 0xc0, 0x14,
+ 0x8100 + address, buf,
+ 1, M5602_URB_MSG_TIMEOUT);
+ *i2c_data = buf[0];
+
+ PDEBUG(D_CONF, "Reading bridge register 0x%x containing 0x%x",
+ address, *i2c_data);
+
+ /* usb_control_msg(...) returns the number of bytes sent upon success,
+ mask that and return zero instead*/
+ return (err < 0) ? err : 0;
+}
+
+/* Writes a byte to the m5602 */
+int m5602_write_bridge(struct sd *sd, const u8 address, const u8 i2c_data)
+{
+ int err;
+ struct gspca_dev *gspca_dev = (struct gspca_dev *) sd;
+ struct usb_device *udev = sd->gspca_dev.dev;
+ __u8 *buf = sd->gspca_dev.usb_buf;
+
+ PDEBUG(D_CONF, "Writing bridge register 0x%x with 0x%x",
+ address, i2c_data);
+
+ memcpy(buf, bridge_urb_skeleton,
+ sizeof(bridge_urb_skeleton));
+ buf[1] = address;
+ buf[3] = i2c_data;
+
+ err = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
+ 0x04, 0x40, 0x19,
+ 0x0000, buf,
+ 4, M5602_URB_MSG_TIMEOUT);
+
+ /* usb_control_msg(...) returns the number of bytes sent upon success,
+ mask that and return zero instead */
+ return (err < 0) ? err : 0;
+}
+
+static int m5602_wait_for_i2c(struct sd *sd)
+{
+ int err;
+ u8 data;
+
+ do {
+ err = m5602_read_bridge(sd, M5602_XB_I2C_STATUS, &data);
+ } while ((data & I2C_BUSY) && !err);
+ return err;
+}
+
+int m5602_read_sensor(struct sd *sd, const u8 address,
+ u8 *i2c_data, const u8 len)
+{
+ int err, i;
+ struct gspca_dev *gspca_dev = (struct gspca_dev *) sd;
+
+ if (!len || len > sd->sensor->i2c_regW)
+ return -EINVAL;
+
+ err = m5602_wait_for_i2c(sd);
+ if (err < 0)
+ return err;
+
+ err = m5602_write_bridge(sd, M5602_XB_I2C_DEV_ADDR,
+ sd->sensor->i2c_slave_id);
+ if (err < 0)
+ return err;
+
+ err = m5602_write_bridge(sd, M5602_XB_I2C_REG_ADDR, address);
+ if (err < 0)
+ return err;
+
+ /* Sensors with registers that are of only
+ one byte width are differently read */
+
+ /* FIXME: This works with the ov9650, but has issues with the po1030 */
+ if (sd->sensor->i2c_regW == 1) {
+ err = m5602_write_bridge(sd, M5602_XB_I2C_CTRL, 1);
+ if (err < 0)
+ return err;
+
+ err = m5602_write_bridge(sd, M5602_XB_I2C_CTRL, 0x08);
+ } else {
+ err = m5602_write_bridge(sd, M5602_XB_I2C_CTRL, 0x18 + len);
+ }
+
+ for (i = 0; (i < len) && !err; i++) {
+ err = m5602_wait_for_i2c(sd);
+ if (err < 0)
+ return err;
+
+ err = m5602_read_bridge(sd, M5602_XB_I2C_DATA, &(i2c_data[i]));
+
+ PDEBUG(D_CONF, "Reading sensor register "
+ "0x%x containing 0x%x ", address, *i2c_data);
+ }
+ return err;
+}
+
+int m5602_write_sensor(struct sd *sd, const u8 address,
+ u8 *i2c_data, const u8 len)
+{
+ int err, i;
+ u8 *p;
+ struct gspca_dev *gspca_dev = (struct gspca_dev *) sd;
+ struct usb_device *udev = sd->gspca_dev.dev;
+ __u8 *buf = sd->gspca_dev.usb_buf;
+
+ /* No sensor with a data width larger than 16 bits has yet been seen */
+ if (len > sd->sensor->i2c_regW || !len)
+ return -EINVAL;
+
+ memcpy(buf, sensor_urb_skeleton,
+ sizeof(sensor_urb_skeleton));
+
+ buf[11] = sd->sensor->i2c_slave_id;
+ buf[15] = address;
+
+ /* Special case larger sensor writes */
+ p = buf + 16;
+
+ /* Copy a four byte write sequence for each byte to be written to */
+ for (i = 0; i < len; i++) {
+ memcpy(p, sensor_urb_skeleton + 16, 4);
+ p[3] = i2c_data[i];
+ p += 4;
+ PDEBUG(D_CONF, "Writing sensor register 0x%x with 0x%x",
+ address, i2c_data[i]);
+ }
+
+ /* Copy the tailer */
+ memcpy(p, sensor_urb_skeleton + 20, 4);
+
+ /* Set the total length */
+ p[3] = 0x10 + len;
+
+ err = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
+ 0x04, 0x40, 0x19,
+ 0x0000, buf,
+ 20 + len * 4, M5602_URB_MSG_TIMEOUT);
+
+ return (err < 0) ? err : 0;
+}
+
+/* Dump all the registers of the m5602 bridge,
+ unfortunately this breaks the camera until it's power cycled */
+static void m5602_dump_bridge(struct sd *sd)
+{
+ int i;
+ for (i = 0; i < 0x80; i++) {
+ unsigned char val = 0;
+ m5602_read_bridge(sd, i, &val);
+ pr_info("ALi m5602 address 0x%x contains 0x%x\n", i, val);
+ }
+ pr_info("Warning: The ALi m5602 webcam probably won't work until it's power cycled\n");
+}
+
+static int m5602_probe_sensor(struct sd *sd)
+{
+ /* Try the po1030 */
+ sd->sensor = &po1030;
+ if (!sd->sensor->probe(sd))
+ return 0;
+
+ /* Try the mt9m111 sensor */
+ sd->sensor = &mt9m111;
+ if (!sd->sensor->probe(sd))
+ return 0;
+
+ /* Try the s5k4aa */
+ sd->sensor = &s5k4aa;
+ if (!sd->sensor->probe(sd))
+ return 0;
+
+ /* Try the ov9650 */
+ sd->sensor = &ov9650;
+ if (!sd->sensor->probe(sd))
+ return 0;
+
+ /* Try the ov7660 */
+ sd->sensor = &ov7660;
+ if (!sd->sensor->probe(sd))
+ return 0;
+
+ /* Try the s5k83a */
+ sd->sensor = &s5k83a;
+ if (!sd->sensor->probe(sd))
+ return 0;
+
+ /* More sensor probe function goes here */
+ pr_info("Failed to find a sensor\n");
+ sd->sensor = NULL;
+ return -ENODEV;
+}
+
+static int m5602_configure(struct gspca_dev *gspca_dev,
+ const struct usb_device_id *id);
+
+static int m5602_init(struct gspca_dev *gspca_dev)
+{
+ struct sd *sd = (struct sd *) gspca_dev;
+ int err;
+
+ PDEBUG(D_CONF, "Initializing ALi m5602 webcam");
+ /* Run the init sequence */
+ err = sd->sensor->init(sd);
+
+ return err;
+}
+
+static int m5602_init_controls(struct gspca_dev *gspca_dev)
+{
+ struct sd *sd = (struct sd *) gspca_dev;
+
+ if (!sd->sensor->init_controls)
+ return 0;
+
+ return sd->sensor->init_controls(sd);
+}
+
+static int m5602_start_transfer(struct gspca_dev *gspca_dev)
+{
+ struct sd *sd = (struct sd *) gspca_dev;
+ __u8 *buf = sd->gspca_dev.usb_buf;
+ int err;
+
+ /* Send start command to the camera */
+ const u8 buffer[4] = {0x13, 0xf9, 0x0f, 0x01};
+
+ if (sd->sensor->start)
+ sd->sensor->start(sd);
+
+ memcpy(buf, buffer, sizeof(buffer));
+ err = usb_control_msg(gspca_dev->dev,
+ usb_sndctrlpipe(gspca_dev->dev, 0),
+ 0x04, 0x40, 0x19, 0x0000, buf,
+ sizeof(buffer), M5602_URB_MSG_TIMEOUT);
+
+ PDEBUG(D_STREAM, "Transfer started");
+ return (err < 0) ? err : 0;
+}
+
+static void m5602_urb_complete(struct gspca_dev *gspca_dev,
+ u8 *data, int len)
+{
+ struct sd *sd = (struct sd *) gspca_dev;
+
+ if (len < 6) {
+ PDEBUG(D_PACK, "Packet is less than 6 bytes");
+ return;
+ }
+
+ /* Frame delimiter: ff xx xx xx ff ff */
+ if (data[0] == 0xff && data[4] == 0xff && data[5] == 0xff &&
+ data[2] != sd->frame_id) {
+ PDEBUG(D_FRAM, "Frame delimiter detected");
+ sd->frame_id = data[2];
+
+ /* Remove the extra fluff appended on each header */
+ data += 6;
+ len -= 6;
+
+ /* Complete the last frame (if any) */
+ gspca_frame_add(gspca_dev, LAST_PACKET,
+ NULL, 0);
+ sd->frame_count++;
+
+ /* Create a new frame */
+ gspca_frame_add(gspca_dev, FIRST_PACKET, data, len);
+
+ PDEBUG(D_FRAM, "Starting new frame %d",
+ sd->frame_count);
+
+ } else {
+ int cur_frame_len;
+
+ cur_frame_len = gspca_dev->image_len;
+ /* Remove urb header */
+ data += 4;
+ len -= 4;
+
+ if (cur_frame_len + len <= gspca_dev->frsz) {
+ PDEBUG(D_FRAM, "Continuing frame %d copying %d bytes",
+ sd->frame_count, len);
+
+ gspca_frame_add(gspca_dev, INTER_PACKET,
+ data, len);
+ } else {
+ /* Add the remaining data up to frame size */
+ gspca_frame_add(gspca_dev, INTER_PACKET, data,
+ gspca_dev->frsz - cur_frame_len);
+ }
+ }
+}
+
+static void m5602_stop_transfer(struct gspca_dev *gspca_dev)
+{
+ struct sd *sd = (struct sd *) gspca_dev;
+
+ /* Run the sensor specific end transfer sequence */
+ if (sd->sensor->stop)
+ sd->sensor->stop(sd);
+}
+
+/* sub-driver description */
+static const struct sd_desc sd_desc = {
+ .name = MODULE_NAME,
+ .config = m5602_configure,
+ .init = m5602_init,
+ .init_controls = m5602_init_controls,
+ .start = m5602_start_transfer,
+ .stopN = m5602_stop_transfer,
+ .pkt_scan = m5602_urb_complete
+};
+
+/* this function is called at probe time */
+static int m5602_configure(struct gspca_dev *gspca_dev,
+ const struct usb_device_id *id)
+{
+ struct sd *sd = (struct sd *) gspca_dev;
+ struct cam *cam;
+ int err;
+
+ cam = &gspca_dev->cam;
+
+ if (dump_bridge)
+ m5602_dump_bridge(sd);
+
+ /* Probe sensor */
+ err = m5602_probe_sensor(sd);
+ if (err)
+ goto fail;
+
+ return 0;
+
+fail:
+ PERR("ALi m5602 webcam failed");
+ cam->cam_mode = NULL;
+ cam->nmodes = 0;
+
+ return err;
+}
+
+static int m5602_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 void m5602_disconnect(struct usb_interface *intf)
+{
+ struct gspca_dev *gspca_dev = usb_get_intfdata(intf);
+ struct sd *sd = (struct sd *) gspca_dev;
+
+ if (sd->sensor->disconnect)
+ sd->sensor->disconnect(sd);
+
+ gspca_disconnect(intf);
+}
+
+static struct usb_driver sd_driver = {
+ .name = MODULE_NAME,
+ .id_table = m5602_table,
+ .probe = m5602_probe,
+#ifdef CONFIG_PM
+ .suspend = gspca_suspend,
+ .resume = gspca_resume,
+ .reset_resume = gspca_resume,
+#endif
+ .disconnect = m5602_disconnect
+};
+
+module_usb_driver(sd_driver);
+
+MODULE_AUTHOR(DRIVER_AUTHOR);
+MODULE_DESCRIPTION(DRIVER_DESC);
+MODULE_LICENSE("GPL");
+module_param(force_sensor, int, S_IRUGO | S_IWUSR);
+MODULE_PARM_DESC(force_sensor,
+ "forces detection of a sensor, "
+ "1 = OV9650, 2 = S5K83A, 3 = S5K4AA, "
+ "4 = MT9M111, 5 = PO1030, 6 = OV7660");
+
+module_param(dump_bridge, bool, S_IRUGO | S_IWUSR);
+MODULE_PARM_DESC(dump_bridge, "Dumps all usb bridge registers at startup");
+
+module_param(dump_sensor, bool, S_IRUGO | S_IWUSR);
+MODULE_PARM_DESC(dump_sensor, "Dumps all usb sensor registers "
+ "at startup providing a sensor is found");
Code Review / kvmfornfv.git / blobdiff