1 // SPDX-License-Identifier: GPL-2.0
5  * Driver for Renesas R-Car ISP Channel Selector
7  * The ISP hardware is capable of more than just channel selection, features
20 #include <media/mipi-csi2.h>
21 #include <media/v4l2-subdev.h>
23 #define ISPINPUTSEL0_REG				0x0008
26 #define ISPSTART_REG					0x0014
27 #define ISPSTART_START					0xffff
28 #define ISPSTART_STOP					0x0000
30 #define ISPPROCMODE_DT_REG(n)				(0x1100 + (0x4 * (n)))
31 #define ISPPROCMODE_DT_PROC_MODE_VC3(pm)		(((pm) & 0x3f) << 24)
32 #define ISPPROCMODE_DT_PROC_MODE_VC2(pm)		(((pm) & 0x3f) << 16)
33 #define ISPPROCMODE_DT_PROC_MODE_VC1(pm)		(((pm) & 0x3f) << 8)
34 #define ISPPROCMODE_DT_PROC_MODE_VC0(pm)		((pm) & 0x3f)
36 #define ISPCS_FILTER_ID_CH_REG(n)			(0x3000 + (0x0100 * (n)))
38 #define ISPCS_DT_CODE03_CH_REG(n)			(0x3008 + (0x100 * (n)))
40 #define ISPCS_DT_CODE03_DT3(dt)				(((dt) & 0x3f) << 24)
42 #define ISPCS_DT_CODE03_DT2(dt)				(((dt) & 0x3f) << 16)
44 #define ISPCS_DT_CODE03_DT1(dt)				(((dt) & 0x3f) << 8)
46 #define ISPCS_DT_CODE03_DT0(dt)				((dt) & 0x3f)
58 		.procmode = 0x15
62 		.procmode = 0x10,
66 		.procmode = 0x0c,
70 		.procmode = 0x0c,
74 		.procmode = 0x0c,
78 		.procmode = 0x0c,
82 		.procmode = 0x00,
86 		.procmode = 0x00,
90 		.procmode = 0x00,
94 		.procmode = 0x00,
98 		.procmode = 0x01,
102 		.procmode = 0x01,
106 		.procmode = 0x01,
110 		.procmode = 0x01,
114 		.procmode = 0x02,
118 		.procmode = 0x02,
122 		.procmode = 0x02,
126 		.procmode = 0x02,
134 	for (i = 0; i < ARRAY_SIZE(rcar_isp_formats); i++) {  in risp_code_to_fmt()
187 static void risp_write(struct rcar_isp *isp, u32 offset, u32 value)  in risp_write()  argument
189 	iowrite32(value, isp->base + offset);  in risp_write()
192 static u32 risp_read(struct rcar_isp *isp, u32 offset)  in risp_read()  argument
194 	return ioread32(isp->base + offset);  in risp_read()
197 static int risp_power_on(struct rcar_isp *isp)  in risp_power_on()  argument
201 	ret = pm_runtime_resume_and_get(isp->dev);  in risp_power_on()
202 	if (ret < 0)  in risp_power_on()
205 	ret = reset_control_deassert(isp->rstc);  in risp_power_on()
206 	if (ret < 0) {  in risp_power_on()
207 		pm_runtime_put(isp->dev);  in risp_power_on()
211 	return 0;  in risp_power_on()
214 static void risp_power_off(struct rcar_isp *isp)  in risp_power_off()  argument
216 	reset_control_assert(isp->rstc);  in risp_power_off()
217 	pm_runtime_put(isp->dev);  in risp_power_off()
220 static int risp_start(struct rcar_isp *isp, struct v4l2_subdev_state *state)  in risp_start()  argument
225 	u32 sel_csi = 0;  in risp_start()
230 		return -EINVAL;  in risp_start()
232 	format = risp_code_to_fmt(fmt->code);  in risp_start()
234 		dev_err(isp->dev, "Unsupported bus format\n");  in risp_start()
235 		return -EINVAL;  in risp_start()
238 	ret = risp_power_on(isp);  in risp_start()
240 		dev_err(isp->dev, "Failed to power on ISP\n");  in risp_start()
244 	/* Select CSI-2 input source. */  in risp_start()
245 	if (isp->csi_input == RISP_CSI_INPUT1)  in risp_start()
248 	risp_write(isp, ISPINPUTSEL0_REG,  in risp_start()
249 		   risp_read(isp, ISPINPUTSEL0_REG) | sel_csi);  in risp_start()
252 	for (vc = 0; vc < 4; vc++) {  in risp_start()
254 		u8 dt = format->datatype;  in risp_start()
256 		risp_write(isp, ISPCS_FILTER_ID_CH_REG(ch), BIT(vc));  in risp_start()
257 		risp_write(isp, ISPCS_DT_CODE03_CH_REG(ch),  in risp_start()
265 	risp_write(isp, ISPPROCMODE_DT_REG(format->datatype),  in risp_start()
266 		   ISPPROCMODE_DT_PROC_MODE_VC3(format->procmode) |  in risp_start()
267 		   ISPPROCMODE_DT_PROC_MODE_VC2(format->procmode) |  in risp_start()
268 		   ISPPROCMODE_DT_PROC_MODE_VC1(format->procmode) |  in risp_start()
269 		   ISPPROCMODE_DT_PROC_MODE_VC0(format->procmode));  in risp_start()
271 	/* Start ISP. */  in risp_start()
272 	risp_write(isp, ISPSTART_REG, ISPSTART_START);  in risp_start()
274 	ret = v4l2_subdev_enable_streams(isp->remote, isp->remote_pad,  in risp_start()
275 					 BIT_ULL(0));  in risp_start()
277 		risp_power_off(isp);  in risp_start()
282 static void risp_stop(struct rcar_isp *isp)  in risp_stop()  argument
284 	v4l2_subdev_disable_streams(isp->remote, isp->remote_pad, BIT_ULL(0));  in risp_stop()
286 	/* Stop ISP. */  in risp_stop()
287 	risp_write(isp, ISPSTART_REG, ISPSTART_STOP);  in risp_stop()
289 	risp_power_off(isp);  in risp_stop()
296 	struct rcar_isp *isp = sd_to_isp(sd);  in risp_enable_streams()  local
297 	int ret = 0;  in risp_enable_streams()
300 		return -EINVAL;  in risp_enable_streams()
302 	if (!isp->remote)  in risp_enable_streams()
303 		return -ENODEV;  in risp_enable_streams()
305 	if (isp->stream_count == 0) {  in risp_enable_streams()
306 		ret = risp_start(isp, state);  in risp_enable_streams()
311 	isp->stream_count += 1;  in risp_enable_streams()
320 	struct rcar_isp *isp = sd_to_isp(sd);  in risp_disable_streams()  local
323 		return -EINVAL;  in risp_disable_streams()
325 	if (!isp->remote)  in risp_disable_streams()
326 		return -ENODEV;  in risp_disable_streams()
328 	if (isp->stream_count == 1)  in risp_disable_streams()
329 		risp_stop(isp);  in risp_disable_streams()
331 	isp->stream_count -= 1;  in risp_disable_streams()
333 	return 0;  in risp_disable_streams()
342 	if (format->pad > RCAR_ISP_SINK)  in risp_set_pad_format()
345 	if (!risp_code_to_fmt(format->format.code))  in risp_set_pad_format()
346 		format->format.code = rcar_isp_formats[0].code;  in risp_set_pad_format()
348 	for (unsigned int i = 0; i < RCAR_ISP_NUM_PADS; i++) {  in risp_set_pad_format()
350 		*framefmt = format->format;  in risp_set_pad_format()
353 	return 0;  in risp_set_pad_format()
368 /* -----------------------------------------------------------------------------
376 	struct rcar_isp *isp = notifier_to_isp(notifier);  in risp_notify_bound()  local
379 	pad = media_entity_get_fwnode_pad(&subdev->entity, asd->match.fwnode,  in risp_notify_bound()
381 	if (pad < 0) {  in risp_notify_bound()
382 		dev_err(isp->dev, "Failed to find pad for %s\n", subdev->name);  in risp_notify_bound()
386 	isp->remote = subdev;  in risp_notify_bound()
387 	isp->remote_pad = pad;  in risp_notify_bound()
389 	dev_dbg(isp->dev, "Bound %s pad: %d\n", subdev->name, pad);  in risp_notify_bound()
391 	return media_create_pad_link(&subdev->entity, pad,  in risp_notify_bound()
392 				     &isp->subdev.entity, 0,  in risp_notify_bound()
401 	struct rcar_isp *isp = notifier_to_isp(notifier);  in risp_notify_unbind()  local
403 	isp->remote = NULL;  in risp_notify_unbind()
405 	dev_dbg(isp->dev, "Unbind %s\n", subdev->name);  in risp_notify_unbind()
413 static int risp_parse_dt(struct rcar_isp *isp)  in risp_parse_dt()  argument
421 	for (id = 0; id < 2; id++) {  in risp_parse_dt()
422 		ep = fwnode_graph_get_endpoint_by_id(dev_fwnode(isp->dev),  in risp_parse_dt()
423 						     0, id, 0);  in risp_parse_dt()
429 		dev_err(isp->dev, "Not connected to subdevice\n");  in risp_parse_dt()
430 		return -EINVAL;  in risp_parse_dt()
434 		isp->csi_input = RISP_CSI_INPUT1;  in risp_parse_dt()
439 	dev_dbg(isp->dev, "Found '%pOF'\n", to_of_node(fwnode));  in risp_parse_dt()
441 	v4l2_async_subdev_nf_init(&isp->notifier, &isp->subdev);  in risp_parse_dt()
442 	isp->notifier.ops = &risp_notify_ops;  in risp_parse_dt()
444 	asd = v4l2_async_nf_add_fwnode(&isp->notifier, fwnode,  in risp_parse_dt()
450 	ret = v4l2_async_nf_register(&isp->notifier);  in risp_parse_dt()
452 		v4l2_async_nf_cleanup(&isp->notifier);  in risp_parse_dt()
457 /* -----------------------------------------------------------------------------
465 static int risp_probe_resources(struct rcar_isp *isp,  in risp_probe_resources()  argument
468 	isp->base = devm_platform_get_and_ioremap_resource(pdev, 0, NULL);  in risp_probe_resources()
469 	if (IS_ERR(isp->base))  in risp_probe_resources()
470 		return PTR_ERR(isp->base);  in risp_probe_resources()
472 	isp->rstc = devm_reset_control_get(&pdev->dev, NULL);  in risp_probe_resources()
474 	return PTR_ERR_OR_ZERO(isp->rstc);  in risp_probe_resources()
478 	{ .compatible = "renesas,r8a779a0-isp" },
479 	{ .compatible = "renesas,r8a779g0-isp" },
481 	{ .compatible = "renesas,rcar-gen4-isp" },
488 	struct rcar_isp *isp;  in risp_probe()  local
492 	isp = devm_kzalloc(&pdev->dev, sizeof(*isp), GFP_KERNEL);  in risp_probe()
493 	if (!isp)  in risp_probe()
494 		return -ENOMEM;  in risp_probe()
496 	isp->dev = &pdev->dev;  in risp_probe()
498 	ret = risp_probe_resources(isp, pdev);  in risp_probe()
500 		dev_err(isp->dev, "Failed to get resources\n");  in risp_probe()
504 	platform_set_drvdata(pdev, isp);  in risp_probe()
506 	pm_runtime_enable(&pdev->dev);  in risp_probe()
508 	ret = risp_parse_dt(isp);  in risp_probe()
512 	isp->subdev.owner = THIS_MODULE;  in risp_probe()
513 	isp->subdev.dev = &pdev->dev;  in risp_probe()
514 	v4l2_subdev_init(&isp->subdev, &rcar_isp_subdev_ops);  in risp_probe()
515 	v4l2_set_subdevdata(&isp->subdev, &pdev->dev);  in risp_probe()
516 	snprintf(isp->subdev.name, sizeof(isp->subdev.name), "%s %s",  in risp_probe()
517 		 KBUILD_MODNAME, dev_name(&pdev->dev));  in risp_probe()
518 	isp->subdev.flags = V4L2_SUBDEV_FL_HAS_DEVNODE;  in risp_probe()
520 	isp->subdev.entity.function = MEDIA_ENT_F_VID_MUX;  in risp_probe()
521 	isp->subdev.entity.ops = &risp_entity_ops;  in risp_probe()
523 	isp->pads[RCAR_ISP_SINK].flags = MEDIA_PAD_FL_SINK;  in risp_probe()
525 		isp->pads[i].flags = MEDIA_PAD_FL_SOURCE;  in risp_probe()
527 	ret = media_entity_pads_init(&isp->subdev.entity, RCAR_ISP_NUM_PADS,  in risp_probe()
528 				     isp->pads);  in risp_probe()
532 	ret = v4l2_subdev_init_finalize(&isp->subdev);  in risp_probe()
536 	ret = v4l2_async_register_subdev(&isp->subdev);  in risp_probe()
537 	if (ret < 0)  in risp_probe()
540 	dev_info(isp->dev, "Using CSI-2 input: %u\n", isp->csi_input);  in risp_probe()
542 	return 0;  in risp_probe()
545 	v4l2_subdev_cleanup(&isp->subdev);  in risp_probe()
547 	v4l2_async_nf_unregister(&isp->notifier);  in risp_probe()
548 	v4l2_async_nf_cleanup(&isp->notifier);  in risp_probe()
550 	pm_runtime_disable(&pdev->dev);  in risp_probe()
557 	struct rcar_isp *isp = platform_get_drvdata(pdev);  in risp_remove()  local
559 	v4l2_async_nf_unregister(&isp->notifier);  in risp_remove()
560 	v4l2_async_nf_cleanup(&isp->notifier);  in risp_remove()
562 	v4l2_async_unregister_subdev(&isp->subdev);  in risp_remove()
563 	v4l2_subdev_cleanup(&isp->subdev);  in risp_remove()
565 	pm_runtime_disable(&pdev->dev);  in risp_remove()
570 		.name = "rcar-isp",
581 MODULE_DESCRIPTION("Renesas R-Car ISP Channel Selector driver");