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treewide: remove redundant IS_ERR() before error code check
[linux/fpc-iii.git] / drivers / media / usb / gspca / stv06xx / stv06xx.c
blob79653d4099516f7235b9de87e052a40d906b8526
1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * Copyright (c) 2001 Jean-Fredric Clere, Nikolas Zimmermann, Georg Acher
4 * Mark Cave-Ayland, Carlo E Prelz, Dick Streefland
5 * Copyright (c) 2002, 2003 Tuukka Toivonen
6 * Copyright (c) 2008 Erik Andrén
7 *
8 * P/N 861037: Sensor HDCS1000 ASIC STV0600
9 * P/N 861050-0010: Sensor HDCS1000 ASIC STV0600
10 * P/N 861050-0020: Sensor Photobit PB100 ASIC STV0600-1 - QuickCam Express
11 * P/N 861055: Sensor ST VV6410 ASIC STV0610 - LEGO cam
12 * P/N 861075-0040: Sensor HDCS1000 ASIC
13 * P/N 961179-0700: Sensor ST VV6410 ASIC STV0602 - Dexxa WebCam USB
14 * P/N 861040-0000: Sensor ST VV6410 ASIC STV0610 - QuickCam Web
15 */
16
17 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
18
19 #include <linux/input.h>
20 #include "stv06xx_sensor.h"
21
22 MODULE_AUTHOR("Erik Andrén");
23 MODULE_DESCRIPTION("STV06XX USB Camera Driver");
24 MODULE_LICENSE("GPL");
25
26 static bool dump_bridge;
27 static bool dump_sensor;
28
29 int stv06xx_write_bridge(struct sd *sd, u16 address, u16 i2c_data)
30 {
31 int err;
32 struct gspca_dev *gspca_dev = (struct gspca_dev *)sd;
33 struct usb_device *udev = sd->gspca_dev.dev;
34 __u8 *buf = sd->gspca_dev.usb_buf;
35
36 u8 len = (i2c_data > 0xff) ? 2 : 1;
37
38 buf[0] = i2c_data & 0xff;
39 buf[1] = (i2c_data >> 8) & 0xff;
40
41 err = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
42 0x04, 0x40, address, 0, buf, len,
43 STV06XX_URB_MSG_TIMEOUT);
44
45 gspca_dbg(gspca_dev, D_CONF, "Written 0x%x to address 0x%x, status: %d\n",
46 i2c_data, address, err);
47
48 return (err < 0) ? err : 0;
49 }
50
51 int stv06xx_read_bridge(struct sd *sd, u16 address, u8 *i2c_data)
52 {
53 int err;
54 struct gspca_dev *gspca_dev = (struct gspca_dev *)sd;
55 struct usb_device *udev = sd->gspca_dev.dev;
56 __u8 *buf = sd->gspca_dev.usb_buf;
57
58 err = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
59 0x04, 0xc0, address, 0, buf, 1,
60 STV06XX_URB_MSG_TIMEOUT);
61
62 *i2c_data = buf[0];
63
64 gspca_dbg(gspca_dev, D_CONF, "Reading 0x%x from address 0x%x, status %d\n",
65 *i2c_data, address, err);
66
67 return (err < 0) ? err : 0;
68 }
69
70 /* Wraps the normal write sensor bytes / words functions for writing a
71 single value */
72 int stv06xx_write_sensor(struct sd *sd, u8 address, u16 value)
73 {
74 if (sd->sensor->i2c_len == 2) {
75 u16 data[2] = { address, value };
76 return stv06xx_write_sensor_words(sd, data, 1);
77 } else {
78 u8 data[2] = { address, value };
79 return stv06xx_write_sensor_bytes(sd, data, 1);
80 }
81 }
82
83 static int stv06xx_write_sensor_finish(struct sd *sd)
84 {
85 int err = 0;
86
87 if (sd->bridge == BRIDGE_STV610) {
88 struct usb_device *udev = sd->gspca_dev.dev;
89 __u8 *buf = sd->gspca_dev.usb_buf;
90
91 buf[0] = 0;
92 err = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
93 0x04, 0x40, 0x1704, 0, buf, 1,
94 STV06XX_URB_MSG_TIMEOUT);
95 }
96
97 return (err < 0) ? err : 0;
98 }
99
100 int stv06xx_write_sensor_bytes(struct sd *sd, const u8 *data, u8 len)
101 {
102 int err, i, j;
103 struct gspca_dev *gspca_dev = (struct gspca_dev *)sd;
104 struct usb_device *udev = sd->gspca_dev.dev;
105 __u8 *buf = sd->gspca_dev.usb_buf;
106
107 gspca_dbg(gspca_dev, D_CONF, "I2C: Command buffer contains %d entries\n",
108 len);
109 for (i = 0; i < len;) {
110 /* Build the command buffer */
111 memset(buf, 0, I2C_BUFFER_LENGTH);
112 for (j = 0; j < I2C_MAX_BYTES && i < len; j++, i++) {
113 buf[j] = data[2*i];
114 buf[0x10 + j] = data[2*i+1];
115 gspca_dbg(gspca_dev, D_CONF, "I2C: Writing 0x%02x to reg 0x%02x\n",
116 data[2*i+1], data[2*i]);
117 }
118 buf[0x20] = sd->sensor->i2c_addr;
119 buf[0x21] = j - 1; /* Number of commands to send - 1 */
120 buf[0x22] = I2C_WRITE_CMD;
121 err = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
122 0x04, 0x40, 0x0400, 0, buf,
123 I2C_BUFFER_LENGTH,
124 STV06XX_URB_MSG_TIMEOUT);
125 if (err < 0)
126 return err;
127 }
128 return stv06xx_write_sensor_finish(sd);
129 }
130
131 int stv06xx_write_sensor_words(struct sd *sd, const u16 *data, u8 len)
132 {
133 int err, i, j;
134 struct gspca_dev *gspca_dev = (struct gspca_dev *)sd;
135 struct usb_device *udev = sd->gspca_dev.dev;
136 __u8 *buf = sd->gspca_dev.usb_buf;
137
138 gspca_dbg(gspca_dev, D_CONF, "I2C: Command buffer contains %d entries\n",
139 len);
140
141 for (i = 0; i < len;) {
142 /* Build the command buffer */
143 memset(buf, 0, I2C_BUFFER_LENGTH);
144 for (j = 0; j < I2C_MAX_WORDS && i < len; j++, i++) {
145 buf[j] = data[2*i];
146 buf[0x10 + j * 2] = data[2*i+1];
147 buf[0x10 + j * 2 + 1] = data[2*i+1] >> 8;
148 gspca_dbg(gspca_dev, D_CONF, "I2C: Writing 0x%04x to reg 0x%02x\n",
149 data[2*i+1], data[2*i]);
150 }
151 buf[0x20] = sd->sensor->i2c_addr;
152 buf[0x21] = j - 1; /* Number of commands to send - 1 */
153 buf[0x22] = I2C_WRITE_CMD;
154 err = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
155 0x04, 0x40, 0x0400, 0, buf,
156 I2C_BUFFER_LENGTH,
157 STV06XX_URB_MSG_TIMEOUT);
158 if (err < 0)
159 return err;
160 }
161 return stv06xx_write_sensor_finish(sd);
162 }
163
164 int stv06xx_read_sensor(struct sd *sd, const u8 address, u16 *value)
165 {
166 int err;
167 struct gspca_dev *gspca_dev = (struct gspca_dev *)sd;
168 struct usb_device *udev = sd->gspca_dev.dev;
169 __u8 *buf = sd->gspca_dev.usb_buf;
170
171 err = stv06xx_write_bridge(sd, STV_I2C_FLUSH, sd->sensor->i2c_flush);
172 if (err < 0)
173 return err;
174
175 /* Clear mem */
176 memset(buf, 0, I2C_BUFFER_LENGTH);
177
178 buf[0] = address;
179 buf[0x20] = sd->sensor->i2c_addr;
180 buf[0x21] = 0;
181
182 /* Read I2C register */
183 buf[0x22] = I2C_READ_CMD;
184
185 err = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
186 0x04, 0x40, 0x1400, 0, buf, I2C_BUFFER_LENGTH,
187 STV06XX_URB_MSG_TIMEOUT);
188 if (err < 0) {
189 pr_err("I2C: Read error writing address: %d\n", err);
190 return err;
191 }
192
193 err = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
194 0x04, 0xc0, 0x1410, 0, buf, sd->sensor->i2c_len,
195 STV06XX_URB_MSG_TIMEOUT);
196 if (sd->sensor->i2c_len == 2)
197 *value = buf[0] | (buf[1] << 8);
198 else
199 *value = buf[0];
200
201 gspca_dbg(gspca_dev, D_CONF, "I2C: Read 0x%x from address 0x%x, status: %d\n",
202 *value, address, err);
203
204 return (err < 0) ? err : 0;
205 }
206
207 /* Dumps all bridge registers */
208 static void stv06xx_dump_bridge(struct sd *sd)
209 {
210 int i;
211 u8 data, buf;
212
213 pr_info("Dumping all stv06xx bridge registers\n");
214 for (i = 0x1400; i < 0x160f; i++) {
215 stv06xx_read_bridge(sd, i, &data);
216
217 pr_info("Read 0x%x from address 0x%x\n", data, i);
218 }
219
220 pr_info("Testing stv06xx bridge registers for writability\n");
221 for (i = 0x1400; i < 0x160f; i++) {
222 stv06xx_read_bridge(sd, i, &data);
223 buf = data;
224
225 stv06xx_write_bridge(sd, i, 0xff);
226 stv06xx_read_bridge(sd, i, &data);
227 if (data == 0xff)
228 pr_info("Register 0x%x is read/write\n", i);
229 else if (data != buf)
230 pr_info("Register 0x%x is read/write, but only partially\n",
231 i);
232 else
233 pr_info("Register 0x%x is read-only\n", i);
234
235 stv06xx_write_bridge(sd, i, buf);
236 }
237 }
238
239 /* this function is called at probe and resume time */
240 static int stv06xx_init(struct gspca_dev *gspca_dev)
241 {
242 struct sd *sd = (struct sd *) gspca_dev;
243 int err;
244
245 gspca_dbg(gspca_dev, D_PROBE, "Initializing camera\n");
246
247 /* Let the usb init settle for a bit
248 before performing the initialization */
249 msleep(250);
250
251 err = sd->sensor->init(sd);
252
253 if (dump_sensor && sd->sensor->dump)
254 sd->sensor->dump(sd);
255
256 return (err < 0) ? err : 0;
257 }
258
259 /* this function is called at probe time */
260 static int stv06xx_init_controls(struct gspca_dev *gspca_dev)
261 {
262 struct sd *sd = (struct sd *) gspca_dev;
263
264 gspca_dbg(gspca_dev, D_PROBE, "Initializing controls\n");
265
266 gspca_dev->vdev.ctrl_handler = &gspca_dev->ctrl_handler;
267 return sd->sensor->init_controls(sd);
268 }
269
270 /* Start the camera */
271 static int stv06xx_start(struct gspca_dev *gspca_dev)
272 {
273 struct sd *sd = (struct sd *) gspca_dev;
274 struct usb_host_interface *alt;
275 struct usb_interface *intf;
276 int err, packet_size;
277
278 intf = usb_ifnum_to_if(sd->gspca_dev.dev, sd->gspca_dev.iface);
279 alt = usb_altnum_to_altsetting(intf, sd->gspca_dev.alt);
280 if (!alt) {
281 gspca_err(gspca_dev, "Couldn't get altsetting\n");
282 return -EIO;
283 }
284
285 packet_size = le16_to_cpu(alt->endpoint[0].desc.wMaxPacketSize);
286 err = stv06xx_write_bridge(sd, STV_ISO_SIZE_L, packet_size);
287 if (err < 0)
288 return err;
289
290 /* Prepare the sensor for start */
291 err = sd->sensor->start(sd);
292 if (err < 0)
293 goto out;
294
295 /* Start isochronous streaming */
296 err = stv06xx_write_bridge(sd, STV_ISO_ENABLE, 1);
297
298 out:
299 if (err < 0)
300 gspca_dbg(gspca_dev, D_STREAM, "Starting stream failed\n");
301 else
302 gspca_dbg(gspca_dev, D_STREAM, "Started streaming\n");
303
304 return (err < 0) ? err : 0;
305 }
306
307 static int stv06xx_isoc_init(struct gspca_dev *gspca_dev)
308 {
309 struct usb_host_interface *alt;
310 struct sd *sd = (struct sd *) gspca_dev;
311
312 /* Start isoc bandwidth "negotiation" at max isoc bandwidth */
313 alt = &gspca_dev->dev->actconfig->intf_cache[0]->altsetting[1];
314 alt->endpoint[0].desc.wMaxPacketSize =
315 cpu_to_le16(sd->sensor->max_packet_size[gspca_dev->curr_mode]);
316
317 return 0;
318 }
319
320 static int stv06xx_isoc_nego(struct gspca_dev *gspca_dev)
321 {
322 int ret, packet_size, min_packet_size;
323 struct usb_host_interface *alt;
324 struct sd *sd = (struct sd *) gspca_dev;
325
326 alt = &gspca_dev->dev->actconfig->intf_cache[0]->altsetting[1];
327 packet_size = le16_to_cpu(alt->endpoint[0].desc.wMaxPacketSize);
328 min_packet_size = sd->sensor->min_packet_size[gspca_dev->curr_mode];
329 if (packet_size <= min_packet_size)
330 return -EIO;
331
332 packet_size -= 100;
333 if (packet_size < min_packet_size)
334 packet_size = min_packet_size;
335 alt->endpoint[0].desc.wMaxPacketSize = cpu_to_le16(packet_size);
336
337 ret = usb_set_interface(gspca_dev->dev, gspca_dev->iface, 1);
338 if (ret < 0)
339 gspca_err(gspca_dev, "set alt 1 err %d\n", ret);
340
341 return ret;
342 }
343
344 static void stv06xx_stopN(struct gspca_dev *gspca_dev)
345 {
346 int err;
347 struct sd *sd = (struct sd *) gspca_dev;
348
349 /* stop ISO-streaming */
350 err = stv06xx_write_bridge(sd, STV_ISO_ENABLE, 0);
351 if (err < 0)
352 goto out;
353
354 err = sd->sensor->stop(sd);
355
356 out:
357 if (err < 0)
358 gspca_dbg(gspca_dev, D_STREAM, "Failed to stop stream\n");
359 else
360 gspca_dbg(gspca_dev, D_STREAM, "Stopped streaming\n");
361 }
362
363 /*
364 * Analyse an USB packet of the data stream and store it appropriately.
365 * Each packet contains an integral number of chunks. Each chunk has
366 * 2-bytes identification, followed by 2-bytes that describe the chunk
367 * length. Known/guessed chunk identifications are:
368 * 8001/8005/C001/C005 - Begin new frame
369 * 8002/8006/C002/C006 - End frame
370 * 0200/4200 - Contains actual image data, bayer or compressed
371 * 0005 - 11 bytes of unknown data
372 * 0100 - 2 bytes of unknown data
373 * The 0005 and 0100 chunks seem to appear only in compressed stream.
374 */
375 static void stv06xx_pkt_scan(struct gspca_dev *gspca_dev,
376 u8 *data, /* isoc packet */
377 int len) /* iso packet length */
378 {
379 struct sd *sd = (struct sd *) gspca_dev;
380
381 gspca_dbg(gspca_dev, D_PACK, "Packet of length %d arrived\n", len);
382
383 /* A packet may contain several frames
384 loop until the whole packet is reached */
385 while (len) {
386 int id, chunk_len;
387
388 if (len < 4) {
389 gspca_dbg(gspca_dev, D_PACK, "Packet is smaller than 4 bytes\n");
390 return;
391 }
392
393 /* Capture the id */
394 id = (data[0] << 8) | data[1];
395
396 /* Capture the chunk length */
397 chunk_len = (data[2] << 8) | data[3];
398 gspca_dbg(gspca_dev, D_PACK, "Chunk id: %x, length: %d\n",
399 id, chunk_len);
400
401 data += 4;
402 len -= 4;
403
404 if (len < chunk_len) {
405 gspca_err(gspca_dev, "URB packet length is smaller than the specified chunk length\n");
406 gspca_dev->last_packet_type = DISCARD_PACKET;
407 return;
408 }
409
410 /* First byte seem to be 02=data 2nd byte is unknown??? */
411 if (sd->bridge == BRIDGE_ST6422 && (id & 0xff00) == 0x0200)
412 goto frame_data;
413
414 switch (id) {
415 case 0x0200:
416 case 0x4200:
417 frame_data:
418 gspca_dbg(gspca_dev, D_PACK, "Frame data packet detected\n");
419
420 if (sd->to_skip) {
421 int skip = (sd->to_skip < chunk_len) ?
422 sd->to_skip : chunk_len;
423 data += skip;
424 len -= skip;
425 chunk_len -= skip;
426 sd->to_skip -= skip;
427 }
428
429 gspca_frame_add(gspca_dev, INTER_PACKET,
430 data, chunk_len);
431 break;
432
433 case 0x8001:
434 case 0x8005:
435 case 0xc001:
436 case 0xc005:
437 gspca_dbg(gspca_dev, D_PACK, "Starting new frame\n");
438
439 /* Create a new frame, chunk length should be zero */
440 gspca_frame_add(gspca_dev, FIRST_PACKET,
441 NULL, 0);
442
443 if (sd->bridge == BRIDGE_ST6422)
444 sd->to_skip = gspca_dev->pixfmt.width * 4;
445
446 if (chunk_len)
447 gspca_err(gspca_dev, "Chunk length is non-zero on a SOF\n");
448 break;
449
450 case 0x8002:
451 case 0x8006:
452 case 0xc002:
453 gspca_dbg(gspca_dev, D_PACK, "End of frame detected\n");
454
455 /* Complete the last frame (if any) */
456 gspca_frame_add(gspca_dev, LAST_PACKET,
457 NULL, 0);
458
459 if (chunk_len)
460 gspca_err(gspca_dev, "Chunk length is non-zero on a EOF\n");
461 break;
462
463 case 0x0005:
464 gspca_dbg(gspca_dev, D_PACK, "Chunk 0x005 detected\n");
465 /* Unknown chunk with 11 bytes of data,
466 occurs just before end of each frame
467 in compressed mode */
468 break;
469
470 case 0x0100:
471 gspca_dbg(gspca_dev, D_PACK, "Chunk 0x0100 detected\n");
472 /* Unknown chunk with 2 bytes of data,
473 occurs 2-3 times per USB interrupt */
474 break;
475 case 0x42ff:
476 gspca_dbg(gspca_dev, D_PACK, "Chunk 0x42ff detected\n");
477 /* Special chunk seen sometimes on the ST6422 */
478 break;
479 default:
480 gspca_dbg(gspca_dev, D_PACK, "Unknown chunk 0x%04x detected\n",
481 id);
482 /* Unknown chunk */
483 }
484 data += chunk_len;
485 len -= chunk_len;
486 }
487 }
488
489 #if IS_ENABLED(CONFIG_INPUT)
490 static int sd_int_pkt_scan(struct gspca_dev *gspca_dev,
491 u8 *data, /* interrupt packet data */
492 int len) /* interrupt packet length */
493 {
494 int ret = -EINVAL;
495
496 if (len == 1 && (data[0] == 0x80 || data[0] == 0x10)) {
497 input_report_key(gspca_dev->input_dev, KEY_CAMERA, 1);
498 input_sync(gspca_dev->input_dev);
499 ret = 0;
500 }
501
502 if (len == 1 && (data[0] == 0x88 || data[0] == 0x11)) {
503 input_report_key(gspca_dev->input_dev, KEY_CAMERA, 0);
504 input_sync(gspca_dev->input_dev);
505 ret = 0;
506 }
507
508 return ret;
509 }
510 #endif
511
512 static int stv06xx_config(struct gspca_dev *gspca_dev,
513 const struct usb_device_id *id);
514
515 /* sub-driver description */
516 static const struct sd_desc sd_desc = {
517 .name = MODULE_NAME,
518 .config = stv06xx_config,
519 .init = stv06xx_init,
520 .init_controls = stv06xx_init_controls,
521 .start = stv06xx_start,
522 .stopN = stv06xx_stopN,
523 .pkt_scan = stv06xx_pkt_scan,
524 .isoc_init = stv06xx_isoc_init,
525 .isoc_nego = stv06xx_isoc_nego,
526 #if IS_ENABLED(CONFIG_INPUT)
527 .int_pkt_scan = sd_int_pkt_scan,
528 #endif
529 };
530
531 /* This function is called at probe time */
532 static int stv06xx_config(struct gspca_dev *gspca_dev,
533 const struct usb_device_id *id)
534 {
535 struct sd *sd = (struct sd *) gspca_dev;
536
537 gspca_dbg(gspca_dev, D_PROBE, "Configuring camera\n");
538
539 sd->bridge = id->driver_info;
540 gspca_dev->sd_desc = &sd_desc;
541
542 if (dump_bridge)
543 stv06xx_dump_bridge(sd);
544
545 sd->sensor = &stv06xx_sensor_st6422;
546 if (!sd->sensor->probe(sd))
547 return 0;
548
549 sd->sensor = &stv06xx_sensor_vv6410;
550 if (!sd->sensor->probe(sd))
551 return 0;
552
553 sd->sensor = &stv06xx_sensor_hdcs1x00;
554 if (!sd->sensor->probe(sd))
555 return 0;
556
557 sd->sensor = &stv06xx_sensor_hdcs1020;
558 if (!sd->sensor->probe(sd))
559 return 0;
560
561 sd->sensor = &stv06xx_sensor_pb0100;
562 if (!sd->sensor->probe(sd))
563 return 0;
564
565 sd->sensor = NULL;
566 return -ENODEV;
567 }
568
569
570
571 /* -- module initialisation -- */
572 static const struct usb_device_id device_table[] = {
573 {USB_DEVICE(0x046d, 0x0840), .driver_info = BRIDGE_STV600 }, /* QuickCam Express */
574 {USB_DEVICE(0x046d, 0x0850), .driver_info = BRIDGE_STV610 }, /* LEGO cam / QuickCam Web */
575 {USB_DEVICE(0x046d, 0x0870), .driver_info = BRIDGE_STV602 }, /* Dexxa WebCam USB */
576 {USB_DEVICE(0x046D, 0x08F0), .driver_info = BRIDGE_ST6422 }, /* QuickCam Messenger */
577 {USB_DEVICE(0x046D, 0x08F5), .driver_info = BRIDGE_ST6422 }, /* QuickCam Communicate */
578 {USB_DEVICE(0x046D, 0x08F6), .driver_info = BRIDGE_ST6422 }, /* QuickCam Messenger (new) */
579 {}
580 };
581 MODULE_DEVICE_TABLE(usb, device_table);
582
583 /* -- device connect -- */
584 static int sd_probe(struct usb_interface *intf,
585 const struct usb_device_id *id)
586 {
587 return gspca_dev_probe(intf, id, &sd_desc, sizeof(struct sd),
588 THIS_MODULE);
589 }
590
591 static void sd_disconnect(struct usb_interface *intf)
592 {
593 struct gspca_dev *gspca_dev = usb_get_intfdata(intf);
594 struct sd *sd = (struct sd *) gspca_dev;
595 void *priv = sd->sensor_priv;
596 gspca_dbg(gspca_dev, D_PROBE, "Disconnecting the stv06xx device\n");
597
598 sd->sensor = NULL;
599 gspca_disconnect(intf);
600 kfree(priv);
601 }
602
603 static struct usb_driver sd_driver = {
604 .name = MODULE_NAME,
605 .id_table = device_table,
606 .probe = sd_probe,
607 .disconnect = sd_disconnect,
608 #ifdef CONFIG_PM
609 .suspend = gspca_suspend,
610 .resume = gspca_resume,
611 .reset_resume = gspca_resume,
612 #endif
613 };
614
615 module_usb_driver(sd_driver);
616
617 module_param(dump_bridge, bool, S_IRUGO | S_IWUSR);
618 MODULE_PARM_DESC(dump_bridge, "Dumps all usb bridge registers at startup");
619
620 module_param(dump_sensor, bool, S_IRUGO | S_IWUSR);
621 MODULE_PARM_DESC(dump_sensor, "Dumps all sensor registers at startup");
Linux with added FPC-III support