1 // SPDX-License-Identifier: GPL-2.0+
3  * IMI RDACM20 GMSL Camera Driver
5  * Copyright (C) 2017-2020 Jacopo Mondi
6  * Copyright (C) 2017-2020 Kieran Bingham
7  * Copyright (C) 2017-2019 Laurent Pinchart
8  * Copyright (C) 2017-2019 Niklas Söderlund
15  * MAX9271 GMSL serializer.
26 #include <media/v4l2-async.h>
27 #include <media/v4l2-ctrls.h>
28 #include <media/v4l2-subdev.h>
131 	/* fifo_hsync_start = 2*(hts - xres) */
132 	{ 0x460a, (2 * (OV10635_HTS - OV10635_WIDTH)) >> 8 },
133 	{ 0x460b, (2 * (OV10635_HTS - OV10635_WIDTH)) & 0xff },
219 	/* Swap data bits order [9:0] -> [0:9] */
236 	{ 0xc488, (OV10635_VTS - 8) * 16 >> 8},
237 	{ 0xc489, (OV10635_VTS - 8) * 16 & 0xff},
238 	{ 0xc48a, (OV10635_VTS - 8) * 16 >> 8},
239 	{ 0xc48b, (OV10635_VTS - 8) * 16 & 0xff}, { 0xc48c, 0x00 },
338 	ret = i2c_master_send(dev->sensor, buf, 2);  in ov10635_read16()
340 		dev_dbg(dev->dev, "%s: register 0x%04x write failed (%d)\n",  in ov10635_read16()
345 	ret = i2c_master_recv(dev->sensor, buf, 2);  in ov10635_read16()
347 		dev_dbg(dev->dev, "%s: register 0x%04x read failed (%d)\n",  in ov10635_read16()
360 	dev_dbg(dev->dev, "%s(0x%04x, 0x%02x)\n", __func__, reg, val);  in __ov10635_write()
362 	ret = i2c_master_send(dev->sensor, buf, 3);  in __ov10635_write()
372 		dev_err(dev->dev, "%s: register 0x%04x write failed (%d)\n",  in ov10635_write()
388 			dev_err(dev->dev,  in ov10635_set_regs()
402 	return max9271_set_serial_link(&dev->serializer, enable);  in rdacm20_s_stream()
409 	if (code->pad || code->index > 0)  in rdacm20_enum_mbus_code()
410 		return -EINVAL;  in rdacm20_enum_mbus_code()
412 	code->code = MEDIA_BUS_FMT_UYVY8_1X16;  in rdacm20_enum_mbus_code()
421 	struct v4l2_mbus_framefmt *mf = &format->format;  in rdacm20_get_fmt()
423 	if (format->pad)  in rdacm20_get_fmt()
424 		return -EINVAL;  in rdacm20_get_fmt()
426 	mf->width		= OV10635_WIDTH;  in rdacm20_get_fmt()
427 	mf->height		= OV10635_HEIGHT;  in rdacm20_get_fmt()
428 	mf->code		= MEDIA_BUS_FMT_UYVY8_1X16;  in rdacm20_get_fmt()
429 	mf->colorspace		= V4L2_COLORSPACE_RAW;  in rdacm20_get_fmt()
430 	mf->field		= V4L2_FIELD_NONE;  in rdacm20_get_fmt()
431 	mf->ycbcr_enc		= V4L2_YCBCR_ENC_601;  in rdacm20_get_fmt()
432 	mf->quantization	= V4L2_QUANTIZATION_FULL_RANGE;  in rdacm20_get_fmt()
433 	mf->xfer_func		= V4L2_XFER_FUNC_NONE;  in rdacm20_get_fmt()
458 	max9271_wake_up(&dev->serializer);  in rdacm20_initialize()
461 	ret = max9271_set_serial_link(&dev->serializer, false);  in rdacm20_initialize()
469 	ret = max9271_configure_i2c(&dev->serializer,  in rdacm20_initialize()
480 	ret = max9271_enable_gpios(&dev->serializer, MAX9271_GPIO1OUT);  in rdacm20_initialize()
484 	ret = max9271_clear_gpios(&dev->serializer, MAX9271_GPIO1OUT);  in rdacm20_initialize()
489 	ret = max9271_configure_gmsl_link(&dev->serializer);  in rdacm20_initialize()
493 	ret = max9271_verify_id(&dev->serializer);  in rdacm20_initialize()
497 	ret = max9271_set_address(&dev->serializer, dev->addrs[0]);  in rdacm20_initialize()
500 	dev->serializer.client->addr = dev->addrs[0];  in rdacm20_initialize()
504 	 * requires at least 2048 XVCLK cycles (85 micro-seconds at 24MHz)  in rdacm20_initialize()
505 	 * before being available. Stay safe and wait up to 500 micro-seconds.  in rdacm20_initialize()
507 	ret = max9271_set_gpios(&dev->serializer, MAX9271_GPIO1OUT);  in rdacm20_initialize()
515 		if (retry--)  in rdacm20_initialize()
518 		dev_err(dev->dev, "OV10635 ID read failed (%d)\n",  in rdacm20_initialize()
520 		return -ENXIO;  in rdacm20_initialize()
524 		if (retry--)  in rdacm20_initialize()
527 		dev_err(dev->dev, "OV10635 ID mismatch (0x%04x)\n",  in rdacm20_initialize()
529 		return -ENXIO;  in rdacm20_initialize()
534 			    (dev->addrs[1] << 1) |  in rdacm20_initialize()
537 		dev_err(dev->dev,  in rdacm20_initialize()
541 	dev->sensor->addr = dev->addrs[1];  in rdacm20_initialize()
550 	dev_info(dev->dev, "Identified RDACM20 camera module\n");  in rdacm20_initialize()
556 	 * amplitude on the remote deserializer side.  in rdacm20_initialize()
564 	return max9271_set_high_threshold(&dev->serializer, true);  in rdacm20_initialize()
572 	dev = devm_kzalloc(&client->dev, sizeof(*dev), GFP_KERNEL);  in rdacm20_probe()
574 		return -ENOMEM;  in rdacm20_probe()
575 	dev->dev = &client->dev;  in rdacm20_probe()
576 	dev->serializer.client = client;  in rdacm20_probe()
578 	ret = of_property_read_u32_array(client->dev.of_node, "reg",  in rdacm20_probe()
579 					 dev->addrs, 2);  in rdacm20_probe()
581 		dev_err(dev->dev, "Invalid DT reg property: %d\n", ret);  in rdacm20_probe()
582 		return -EINVAL;  in rdacm20_probe()
586 	dev->sensor = i2c_new_dummy_device(client->adapter,  in rdacm20_probe()
588 	if (IS_ERR(dev->sensor)) {  in rdacm20_probe()
589 		ret = PTR_ERR(dev->sensor);  in rdacm20_probe()
599 	v4l2_i2c_subdev_init(&dev->sd, client, &rdacm20_subdev_ops);  in rdacm20_probe()
600 	dev->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;  in rdacm20_probe()
602 	v4l2_ctrl_handler_init(&dev->ctrls, 1);  in rdacm20_probe()
603 	v4l2_ctrl_new_std(&dev->ctrls, NULL, V4L2_CID_PIXEL_RATE,  in rdacm20_probe()
606 	dev->sd.ctrl_handler = &dev->ctrls;  in rdacm20_probe()
608 	ret = dev->ctrls.error;  in rdacm20_probe()
612 	dev->pad.flags = MEDIA_PAD_FL_SOURCE;  in rdacm20_probe()
613 	dev->sd.entity.function = MEDIA_ENT_F_CAM_SENSOR;  in rdacm20_probe()
614 	ret = media_entity_pads_init(&dev->sd.entity, 1, &dev->pad);  in rdacm20_probe()
618 	ret = v4l2_async_register_subdev(&dev->sd);  in rdacm20_probe()
625 	v4l2_ctrl_handler_free(&dev->ctrls);  in rdacm20_probe()
627 	media_entity_cleanup(&dev->sd.entity);  in rdacm20_probe()
628 	i2c_unregister_device(dev->sensor);  in rdacm20_probe()
630 	dev_err(&client->dev, "probe failed\n");  in rdacm20_probe()
639 	v4l2_async_unregister_subdev(&dev->sd);  in rdacm20_remove()
640 	v4l2_ctrl_handler_free(&dev->ctrls);  in rdacm20_remove()
641 	media_entity_cleanup(&dev->sd.entity);  in rdacm20_remove()
642 	i2c_unregister_device(dev->sensor);  in rdacm20_remove()
650 	rdacm20_s_stream(&dev->sd, 0);  in rdacm20_shutdown()
671 MODULE_DESCRIPTION("GMSL Camera driver for RDACM20");