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path: root/drivers/media/usb/gspca/stv06xx/stv06xx.c
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Diffstat (limited to 'drivers/media/usb/gspca/stv06xx/stv06xx.c')
-rw-r--r--drivers/media/usb/gspca/stv06xx/stv06xx.c634
1 files changed, 634 insertions, 0 deletions
diff --git a/drivers/media/usb/gspca/stv06xx/stv06xx.c b/drivers/media/usb/gspca/stv06xx/stv06xx.c
new file mode 100644
index 000000000000..999ec7764449
--- /dev/null
+++ b/drivers/media/usb/gspca/stv06xx/stv06xx.c
@@ -0,0 +1,634 @@
+/*
+ * Copyright (c) 2001 Jean-Fredric Clere, Nikolas Zimmermann, Georg Acher
+ * Mark Cave-Ayland, Carlo E Prelz, Dick Streefland
+ * Copyright (c) 2002, 2003 Tuukka Toivonen
+ * Copyright (c) 2008 Erik Andrén
+ *
+ * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ * P/N 861037: Sensor HDCS1000 ASIC STV0600
+ * P/N 861050-0010: Sensor HDCS1000 ASIC STV0600
+ * P/N 861050-0020: Sensor Photobit PB100 ASIC STV0600-1 - QuickCam Express
+ * P/N 861055: Sensor ST VV6410 ASIC STV0610 - LEGO cam
+ * P/N 861075-0040: Sensor HDCS1000 ASIC
+ * P/N 961179-0700: Sensor ST VV6410 ASIC STV0602 - Dexxa WebCam USB
+ * P/N 861040-0000: Sensor ST VV6410 ASIC STV0610 - QuickCam Web
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/input.h>
+#include "stv06xx_sensor.h"
+
+MODULE_AUTHOR("Erik Andrén");
+MODULE_DESCRIPTION("STV06XX USB Camera Driver");
+MODULE_LICENSE("GPL");
+
+static bool dump_bridge;
+static bool dump_sensor;
+
+int stv06xx_write_bridge(struct sd *sd, u16 address, u16 i2c_data)
+{
+ int err;
+ struct usb_device *udev = sd->gspca_dev.dev;
+ __u8 *buf = sd->gspca_dev.usb_buf;
+ u8 len = (i2c_data > 0xff) ? 2 : 1;
+
+ buf[0] = i2c_data & 0xff;
+ buf[1] = (i2c_data >> 8) & 0xff;
+
+ err = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
+ 0x04, 0x40, address, 0, buf, len,
+ STV06XX_URB_MSG_TIMEOUT);
+
+ PDEBUG(D_CONF, "Written 0x%x to address 0x%x, status: %d",
+ i2c_data, address, err);
+
+ return (err < 0) ? err : 0;
+}
+
+int stv06xx_read_bridge(struct sd *sd, u16 address, u8 *i2c_data)
+{
+ int err;
+ 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, address, 0, buf, 1,
+ STV06XX_URB_MSG_TIMEOUT);
+
+ *i2c_data = buf[0];
+
+ PDEBUG(D_CONF, "Reading 0x%x from address 0x%x, status %d",
+ *i2c_data, address, err);
+
+ return (err < 0) ? err : 0;
+}
+
+/* Wraps the normal write sensor bytes / words functions for writing a
+ single value */
+int stv06xx_write_sensor(struct sd *sd, u8 address, u16 value)
+{
+ if (sd->sensor->i2c_len == 2) {
+ u16 data[2] = { address, value };
+ return stv06xx_write_sensor_words(sd, data, 1);
+ } else {
+ u8 data[2] = { address, value };
+ return stv06xx_write_sensor_bytes(sd, data, 1);
+ }
+}
+
+static int stv06xx_write_sensor_finish(struct sd *sd)
+{
+ int err = 0;
+
+ if (sd->bridge == BRIDGE_STV610) {
+ struct usb_device *udev = sd->gspca_dev.dev;
+ __u8 *buf = sd->gspca_dev.usb_buf;
+
+ buf[0] = 0;
+ err = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
+ 0x04, 0x40, 0x1704, 0, buf, 1,
+ STV06XX_URB_MSG_TIMEOUT);
+ }
+
+ return (err < 0) ? err : 0;
+}
+
+int stv06xx_write_sensor_bytes(struct sd *sd, const u8 *data, u8 len)
+{
+ int err, i, j;
+ struct usb_device *udev = sd->gspca_dev.dev;
+ __u8 *buf = sd->gspca_dev.usb_buf;
+
+ PDEBUG(D_CONF, "I2C: Command buffer contains %d entries", len);
+ for (i = 0; i < len;) {
+ /* Build the command buffer */
+ memset(buf, 0, I2C_BUFFER_LENGTH);
+ for (j = 0; j < I2C_MAX_BYTES && i < len; j++, i++) {
+ buf[j] = data[2*i];
+ buf[0x10 + j] = data[2*i+1];
+ PDEBUG(D_CONF, "I2C: Writing 0x%02x to reg 0x%02x",
+ data[2*i+1], data[2*i]);
+ }
+ buf[0x20] = sd->sensor->i2c_addr;
+ buf[0x21] = j - 1; /* Number of commands to send - 1 */
+ buf[0x22] = I2C_WRITE_CMD;
+ err = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
+ 0x04, 0x40, 0x0400, 0, buf,
+ I2C_BUFFER_LENGTH,
+ STV06XX_URB_MSG_TIMEOUT);
+ if (err < 0)
+ return err;
+ }
+ return stv06xx_write_sensor_finish(sd);
+}
+
+int stv06xx_write_sensor_words(struct sd *sd, const u16 *data, u8 len)
+{
+ int err, i, j;
+ struct usb_device *udev = sd->gspca_dev.dev;
+ __u8 *buf = sd->gspca_dev.usb_buf;
+
+ PDEBUG(D_CONF, "I2C: Command buffer contains %d entries", len);
+
+ for (i = 0; i < len;) {
+ /* Build the command buffer */
+ memset(buf, 0, I2C_BUFFER_LENGTH);
+ for (j = 0; j < I2C_MAX_WORDS && i < len; j++, i++) {
+ buf[j] = data[2*i];
+ buf[0x10 + j * 2] = data[2*i+1];
+ buf[0x10 + j * 2 + 1] = data[2*i+1] >> 8;
+ PDEBUG(D_CONF, "I2C: Writing 0x%04x to reg 0x%02x",
+ data[2*i+1], data[2*i]);
+ }
+ buf[0x20] = sd->sensor->i2c_addr;
+ buf[0x21] = j - 1; /* Number of commands to send - 1 */
+ buf[0x22] = I2C_WRITE_CMD;
+ err = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
+ 0x04, 0x40, 0x0400, 0, buf,
+ I2C_BUFFER_LENGTH,
+ STV06XX_URB_MSG_TIMEOUT);
+ if (err < 0)
+ return err;
+ }
+ return stv06xx_write_sensor_finish(sd);
+}
+
+int stv06xx_read_sensor(struct sd *sd, const u8 address, u16 *value)
+{
+ int err;
+ struct usb_device *udev = sd->gspca_dev.dev;
+ __u8 *buf = sd->gspca_dev.usb_buf;
+
+ err = stv06xx_write_bridge(sd, STV_I2C_FLUSH, sd->sensor->i2c_flush);
+ if (err < 0)
+ return err;
+
+ /* Clear mem */
+ memset(buf, 0, I2C_BUFFER_LENGTH);
+
+ buf[0] = address;
+ buf[0x20] = sd->sensor->i2c_addr;
+ buf[0x21] = 0;
+
+ /* Read I2C register */
+ buf[0x22] = I2C_READ_CMD;
+
+ err = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
+ 0x04, 0x40, 0x1400, 0, buf, I2C_BUFFER_LENGTH,
+ STV06XX_URB_MSG_TIMEOUT);
+ if (err < 0) {
+ pr_err("I2C: Read error writing address: %d\n", err);
+ return err;
+ }
+
+ err = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
+ 0x04, 0xc0, 0x1410, 0, buf, sd->sensor->i2c_len,
+ STV06XX_URB_MSG_TIMEOUT);
+ if (sd->sensor->i2c_len == 2)
+ *value = buf[0] | (buf[1] << 8);
+ else
+ *value = buf[0];
+
+ PDEBUG(D_CONF, "I2C: Read 0x%x from address 0x%x, status: %d",
+ *value, address, err);
+
+ return (err < 0) ? err : 0;
+}
+
+/* Dumps all bridge registers */
+static void stv06xx_dump_bridge(struct sd *sd)
+{
+ int i;
+ u8 data, buf;
+
+ pr_info("Dumping all stv06xx bridge registers\n");
+ for (i = 0x1400; i < 0x160f; i++) {
+ stv06xx_read_bridge(sd, i, &data);
+
+ pr_info("Read 0x%x from address 0x%x\n", data, i);
+ }
+
+ pr_info("Testing stv06xx bridge registers for writability\n");
+ for (i = 0x1400; i < 0x160f; i++) {
+ stv06xx_read_bridge(sd, i, &data);
+ buf = data;
+
+ stv06xx_write_bridge(sd, i, 0xff);
+ stv06xx_read_bridge(sd, i, &data);
+ if (data == 0xff)
+ pr_info("Register 0x%x is read/write\n", i);
+ else if (data != buf)
+ pr_info("Register 0x%x is read/write, but only partially\n",
+ i);
+ else
+ pr_info("Register 0x%x is read-only\n", i);
+
+ stv06xx_write_bridge(sd, i, buf);
+ }
+}
+
+/* this function is called at probe and resume time */
+static int stv06xx_init(struct gspca_dev *gspca_dev)
+{
+ struct sd *sd = (struct sd *) gspca_dev;
+ int err;
+
+ PDEBUG(D_PROBE, "Initializing camera");
+
+ /* Let the usb init settle for a bit
+ before performing the initialization */
+ msleep(250);
+
+ err = sd->sensor->init(sd);
+
+ if (dump_sensor && sd->sensor->dump)
+ sd->sensor->dump(sd);
+
+ return (err < 0) ? err : 0;
+}
+
+/* this function is called at probe time */
+static int stv06xx_init_controls(struct gspca_dev *gspca_dev)
+{
+ struct sd *sd = (struct sd *) gspca_dev;
+
+ PDEBUG(D_PROBE, "Initializing controls");
+
+ gspca_dev->vdev.ctrl_handler = &gspca_dev->ctrl_handler;
+ return sd->sensor->init_controls(sd);
+}
+
+/* Start the camera */
+static int stv06xx_start(struct gspca_dev *gspca_dev)
+{
+ struct sd *sd = (struct sd *) gspca_dev;
+ struct usb_host_interface *alt;
+ struct usb_interface *intf;
+ int err, packet_size;
+
+ intf = usb_ifnum_to_if(sd->gspca_dev.dev, sd->gspca_dev.iface);
+ alt = usb_altnum_to_altsetting(intf, sd->gspca_dev.alt);
+ if (!alt) {
+ PDEBUG(D_ERR, "Couldn't get altsetting");
+ return -EIO;
+ }
+
+ packet_size = le16_to_cpu(alt->endpoint[0].desc.wMaxPacketSize);
+ err = stv06xx_write_bridge(sd, STV_ISO_SIZE_L, packet_size);
+ if (err < 0)
+ return err;
+
+ /* Prepare the sensor for start */
+ err = sd->sensor->start(sd);
+ if (err < 0)
+ goto out;
+
+ /* Start isochronous streaming */
+ err = stv06xx_write_bridge(sd, STV_ISO_ENABLE, 1);
+
+out:
+ if (err < 0)
+ PDEBUG(D_STREAM, "Starting stream failed");
+ else
+ PDEBUG(D_STREAM, "Started streaming");
+
+ return (err < 0) ? err : 0;
+}
+
+static int stv06xx_isoc_init(struct gspca_dev *gspca_dev)
+{
+ struct usb_host_interface *alt;
+ struct sd *sd = (struct sd *) gspca_dev;
+
+ /* Start isoc bandwidth "negotiation" at max isoc bandwidth */
+ alt = &gspca_dev->dev->actconfig->intf_cache[0]->altsetting[1];
+ alt->endpoint[0].desc.wMaxPacketSize =
+ cpu_to_le16(sd->sensor->max_packet_size[gspca_dev->curr_mode]);
+
+ return 0;
+}
+
+static int stv06xx_isoc_nego(struct gspca_dev *gspca_dev)
+{
+ int ret, packet_size, min_packet_size;
+ struct usb_host_interface *alt;
+ struct sd *sd = (struct sd *) gspca_dev;
+
+ alt = &gspca_dev->dev->actconfig->intf_cache[0]->altsetting[1];
+ packet_size = le16_to_cpu(alt->endpoint[0].desc.wMaxPacketSize);
+ min_packet_size = sd->sensor->min_packet_size[gspca_dev->curr_mode];
+ if (packet_size <= min_packet_size)
+ return -EIO;
+
+ packet_size -= 100;
+ if (packet_size < min_packet_size)
+ packet_size = min_packet_size;
+ alt->endpoint[0].desc.wMaxPacketSize = cpu_to_le16(packet_size);
+
+ ret = usb_set_interface(gspca_dev->dev, gspca_dev->iface, 1);
+ if (ret < 0)
+ PDEBUG(D_ERR|D_STREAM, "set alt 1 err %d", ret);
+
+ return ret;
+}
+
+static void stv06xx_stopN(struct gspca_dev *gspca_dev)
+{
+ int err;
+ struct sd *sd = (struct sd *) gspca_dev;
+
+ /* stop ISO-streaming */
+ err = stv06xx_write_bridge(sd, STV_ISO_ENABLE, 0);
+ if (err < 0)
+ goto out;
+
+ err = sd->sensor->stop(sd);
+
+out:
+ if (err < 0)
+ PDEBUG(D_STREAM, "Failed to stop stream");
+ else
+ PDEBUG(D_STREAM, "Stopped streaming");
+}
+
+/*
+ * Analyse an USB packet of the data stream and store it appropriately.
+ * Each packet contains an integral number of chunks. Each chunk has
+ * 2-bytes identification, followed by 2-bytes that describe the chunk
+ * length. Known/guessed chunk identifications are:
+ * 8001/8005/C001/C005 - Begin new frame
+ * 8002/8006/C002/C006 - End frame
+ * 0200/4200 - Contains actual image data, bayer or compressed
+ * 0005 - 11 bytes of unknown data
+ * 0100 - 2 bytes of unknown data
+ * The 0005 and 0100 chunks seem to appear only in compressed stream.
+ */
+static void stv06xx_pkt_scan(struct gspca_dev *gspca_dev,
+ u8 *data, /* isoc packet */
+ int len) /* iso packet length */
+{
+ struct sd *sd = (struct sd *) gspca_dev;
+
+ PDEBUG(D_PACK, "Packet of length %d arrived", len);
+
+ /* A packet may contain several frames
+ loop until the whole packet is reached */
+ while (len) {
+ int id, chunk_len;
+
+ if (len < 4) {
+ PDEBUG(D_PACK, "Packet is smaller than 4 bytes");
+ return;
+ }
+
+ /* Capture the id */
+ id = (data[0] << 8) | data[1];
+
+ /* Capture the chunk length */
+ chunk_len = (data[2] << 8) | data[3];
+ PDEBUG(D_PACK, "Chunk id: %x, length: %d", id, chunk_len);
+
+ data += 4;
+ len -= 4;
+
+ if (len < chunk_len) {
+ PDEBUG(D_ERR, "URB packet length is smaller"
+ " than the specified chunk length");
+ gspca_dev->last_packet_type = DISCARD_PACKET;
+ return;
+ }
+
+ /* First byte seem to be 02=data 2nd byte is unknown??? */
+ if (sd->bridge == BRIDGE_ST6422 && (id & 0xff00) == 0x0200)
+ goto frame_data;
+
+ switch (id) {
+ case 0x0200:
+ case 0x4200:
+frame_data:
+ PDEBUG(D_PACK, "Frame data packet detected");
+
+ if (sd->to_skip) {
+ int skip = (sd->to_skip < chunk_len) ?
+ sd->to_skip : chunk_len;
+ data += skip;
+ len -= skip;
+ chunk_len -= skip;
+ sd->to_skip -= skip;
+ }
+
+ gspca_frame_add(gspca_dev, INTER_PACKET,
+ data, chunk_len);
+ break;
+
+ case 0x8001:
+ case 0x8005:
+ case 0xc001:
+ case 0xc005:
+ PDEBUG(D_PACK, "Starting new frame");
+
+ /* Create a new frame, chunk length should be zero */
+ gspca_frame_add(gspca_dev, FIRST_PACKET,
+ NULL, 0);
+
+ if (sd->bridge == BRIDGE_ST6422)
+ sd->to_skip = gspca_dev->width * 4;
+
+ if (chunk_len)
+ PDEBUG(D_ERR, "Chunk length is "
+ "non-zero on a SOF");
+ break;
+
+ case 0x8002:
+ case 0x8006:
+ case 0xc002:
+ PDEBUG(D_PACK, "End of frame detected");
+
+ /* Complete the last frame (if any) */
+ gspca_frame_add(gspca_dev, LAST_PACKET,
+ NULL, 0);
+
+ if (chunk_len)
+ PDEBUG(D_ERR, "Chunk length is "
+ "non-zero on a EOF");
+ break;
+
+ case 0x0005:
+ PDEBUG(D_PACK, "Chunk 0x005 detected");
+ /* Unknown chunk with 11 bytes of data,
+ occurs just before end of each frame
+ in compressed mode */
+ break;
+
+ case 0x0100:
+ PDEBUG(D_PACK, "Chunk 0x0100 detected");
+ /* Unknown chunk with 2 bytes of data,
+ occurs 2-3 times per USB interrupt */
+ break;
+ case 0x42ff:
+ PDEBUG(D_PACK, "Chunk 0x42ff detected");
+ /* Special chunk seen sometimes on the ST6422 */
+ break;
+ default:
+ PDEBUG(D_PACK, "Unknown chunk 0x%04x detected", id);
+ /* Unknown chunk */
+ }
+ data += chunk_len;
+ len -= chunk_len;
+ }
+}
+
+#if defined(CONFIG_INPUT) || defined(CONFIG_INPUT_MODULE)
+static int sd_int_pkt_scan(struct gspca_dev *gspca_dev,
+ u8 *data, /* interrupt packet data */
+ int len) /* interrupt packet length */
+{
+ int ret = -EINVAL;
+
+ if (len == 1 && data[0] == 0x80) {
+ input_report_key(gspca_dev->input_dev, KEY_CAMERA, 1);
+ input_sync(gspca_dev->input_dev);
+ ret = 0;
+ }
+
+ if (len == 1 && data[0] == 0x88) {
+ input_report_key(gspca_dev->input_dev, KEY_CAMERA, 0);
+ input_sync(gspca_dev->input_dev);
+ ret = 0;
+ }
+
+ return ret;
+}
+#endif
+
+static int stv06xx_config(struct gspca_dev *gspca_dev,
+ const struct usb_device_id *id);
+
+/* sub-driver description */
+static const struct sd_desc sd_desc = {
+ .name = MODULE_NAME,
+ .config = stv06xx_config,
+ .init = stv06xx_init,
+ .init_controls = stv06xx_init_controls,
+ .start = stv06xx_start,
+ .stopN = stv06xx_stopN,
+ .pkt_scan = stv06xx_pkt_scan,
+ .isoc_init = stv06xx_isoc_init,
+ .isoc_nego = stv06xx_isoc_nego,
+#if defined(CONFIG_INPUT) || defined(CONFIG_INPUT_MODULE)
+ .int_pkt_scan = sd_int_pkt_scan,
+#endif
+};
+
+/* This function is called at probe time */
+static int stv06xx_config(struct gspca_dev *gspca_dev,
+ const struct usb_device_id *id)
+{
+ struct sd *sd = (struct sd *) gspca_dev;
+
+ PDEBUG(D_PROBE, "Configuring camera");
+
+ sd->bridge = id->driver_info;
+ gspca_dev->sd_desc = &sd_desc;
+
+ if (dump_bridge)
+ stv06xx_dump_bridge(sd);
+
+ sd->sensor = &stv06xx_sensor_st6422;
+ if (!sd->sensor->probe(sd))
+ return 0;
+
+ sd->sensor = &stv06xx_sensor_vv6410;
+ if (!sd->sensor->probe(sd))
+ return 0;
+
+ sd->sensor = &stv06xx_sensor_hdcs1x00;
+ if (!sd->sensor->probe(sd))
+ return 0;
+
+ sd->sensor = &stv06xx_sensor_hdcs1020;
+ if (!sd->sensor->probe(sd))
+ return 0;
+
+ sd->sensor = &stv06xx_sensor_pb0100;
+ if (!sd->sensor->probe(sd))
+ return 0;
+
+ sd->sensor = NULL;
+ return -ENODEV;
+}
+
+
+
+/* -- module initialisation -- */
+static const struct usb_device_id device_table[] = {
+ /* QuickCam Express */
+ {USB_DEVICE(0x046d, 0x0840), .driver_info = BRIDGE_STV600 },
+ /* LEGO cam / QuickCam Web */
+ {USB_DEVICE(0x046d, 0x0850), .driver_info = BRIDGE_STV610 },
+ /* Dexxa WebCam USB */
+ {USB_DEVICE(0x046d, 0x0870), .driver_info = BRIDGE_STV602 },
+ /* QuickCam Messenger */
+ {USB_DEVICE(0x046D, 0x08F0), .driver_info = BRIDGE_ST6422 },
+ /* QuickCam Communicate */
+ {USB_DEVICE(0x046D, 0x08F5), .driver_info = BRIDGE_ST6422 },
+ /* QuickCam Messenger (new) */
+ {USB_DEVICE(0x046D, 0x08F6), .driver_info = BRIDGE_ST6422 },
+ {}
+};
+MODULE_DEVICE_TABLE(usb, device_table);
+
+/* -- device connect -- */
+static int sd_probe(struct usb_interface *intf,
+ const struct usb_device_id *id)
+{
+ PDEBUG(D_PROBE, "Probing for a stv06xx device");
+ return gspca_dev_probe(intf, id, &sd_desc, sizeof(struct sd),
+ THIS_MODULE);
+}
+
+static void sd_disconnect(struct usb_interface *intf)
+{
+ struct gspca_dev *gspca_dev = usb_get_intfdata(intf);
+ struct sd *sd = (struct sd *) gspca_dev;
+ void *priv = sd->sensor_priv;
+ PDEBUG(D_PROBE, "Disconnecting the stv06xx device");
+
+ sd->sensor = NULL;
+ gspca_disconnect(intf);
+ kfree(priv);
+}
+
+static struct usb_driver sd_driver = {
+ .name = MODULE_NAME,
+ .id_table = device_table,
+ .probe = sd_probe,
+ .disconnect = sd_disconnect,
+#ifdef CONFIG_PM
+ .suspend = gspca_suspend,
+ .resume = gspca_resume,
+ .reset_resume = gspca_resume,
+#endif
+};
+
+module_usb_driver(sd_driver);
+
+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 sensor registers at startup");
generated by cgit v1.2.3 (git 2.25.1) at 2024-04-25 15:06:58 +0000