1 // SPDX-License-Identifier: GPL-2.0-only
17 #include <uapi/linux/counter/microchip-tcb-capture.h>
38 static const enum counter_function mchp_tc_count_functions[] = {
43 static const enum counter_synapse_action mchp_tc_synapse_actions[] = {
53 		.name = "Channel A",
57 		.name = "Channel B",
76 				       enum counter_function *function)  in mchp_tc_count_function_read()
80 	if (priv->qdec_mode)  in mchp_tc_count_function_read()
90 					enum counter_function function)  in mchp_tc_count_function_write()
95 	regmap_read(priv->regmap, ATMEL_TC_BMR, &bmr);  in mchp_tc_count_function_write()
96 	regmap_read(priv->regmap, ATMEL_TC_REG(priv->channel[0], CMR), &cmr);  in mchp_tc_count_function_write()
103 		priv->qdec_mode = 0;  in mchp_tc_count_function_write()
106 		if (!priv->tc_cfg->has_gclk)  in mchp_tc_count_function_write()
115 		if (!priv->tc_cfg->has_qdec)  in mchp_tc_count_function_write()
116 			return -EINVAL;  in mchp_tc_count_function_write()
118 		if (priv->num_channels < 2 || priv->channel[0] != 0 ||  in mchp_tc_count_function_write()
119 		    priv->channel[1] != 1) {  in mchp_tc_count_function_write()
121 			return -EINVAL;  in mchp_tc_count_function_write()
123 		priv->qdec_mode = 1;  in mchp_tc_count_function_write()
129 		return -EINVAL;  in mchp_tc_count_function_write()
132 	regmap_write(priv->regmap, ATMEL_TC_BMR, bmr);  in mchp_tc_count_function_write()
133 	regmap_write(priv->regmap, ATMEL_TC_REG(priv->channel[0], CMR), cmr);  in mchp_tc_count_function_write()
136 	regmap_write(priv->regmap, ATMEL_TC_REG(priv->channel[0], CCR),  in mchp_tc_count_function_write()
139 	if (priv->qdec_mode) {  in mchp_tc_count_function_write()
140 		regmap_write(priv->regmap,  in mchp_tc_count_function_write()
141 			     ATMEL_TC_REG(priv->channel[1], CMR), cmr);  in mchp_tc_count_function_write()
142 		regmap_write(priv->regmap,  in mchp_tc_count_function_write()
143 			     ATMEL_TC_REG(priv->channel[1], CCR),  in mchp_tc_count_function_write()
152 				     enum counter_signal_level *lvl)  in mchp_tc_count_signal_read()
158 	regmap_read(priv->regmap, ATMEL_TC_REG(priv->channel[0], SR), &sr);  in mchp_tc_count_signal_read()
160 	if (signal->id == 1)  in mchp_tc_count_signal_read()
173 				     enum counter_synapse_action *action)  in mchp_tc_count_action_read()
178 	if (priv->qdec_mode) {  in mchp_tc_count_action_read()
183 	/* Only TIOA signal is evaluated in non-QDEC mode */  in mchp_tc_count_action_read()
184 	if (synapse->signal->id != 0) {  in mchp_tc_count_action_read()
189 	regmap_read(priv->regmap, ATMEL_TC_REG(priv->channel[0], CMR), &cmr);  in mchp_tc_count_action_read()
212 				      enum counter_synapse_action action)  in mchp_tc_count_action_write()
217 	/* QDEC mode is rising edge only; only TIOA handled in non-QDEC mode */  in mchp_tc_count_action_write()
218 	if (priv->qdec_mode || synapse->signal->id != 0)  in mchp_tc_count_action_write()
219 		return -EINVAL;  in mchp_tc_count_action_write()
236 		return -EINVAL;  in mchp_tc_count_action_write()
239 	return regmap_write_bits(priv->regmap,  in mchp_tc_count_action_write()
240 				ATMEL_TC_REG(priv->channel[0], CMR),  in mchp_tc_count_action_write()
248 	u32 cnt;  in mchp_tc_count_read()  local
250 	regmap_read(priv->regmap, ATMEL_TC_REG(priv->channel[0], CV), &cnt);  in mchp_tc_count_read()
251 	*val = cnt;  in mchp_tc_count_read()
260 	u32 cnt;  in mchp_tc_count_cap_read()  local
265 		ret = regmap_read(priv->regmap, ATMEL_TC_REG(priv->channel[0], RA), &cnt);  in mchp_tc_count_cap_read()
268 		ret = regmap_read(priv->regmap, ATMEL_TC_REG(priv->channel[0], RB), &cnt);  in mchp_tc_count_cap_read()
271 		return -EINVAL;  in mchp_tc_count_cap_read()
277 	*val = cnt;  in mchp_tc_count_cap_read()
289 		return -ERANGE;  in mchp_tc_count_cap_write()
293 		ret = regmap_write(priv->regmap, ATMEL_TC_REG(priv->channel[0], RA), val);  in mchp_tc_count_cap_write()
296 		ret = regmap_write(priv->regmap, ATMEL_TC_REG(priv->channel[0], RB), val);  in mchp_tc_count_cap_write()
299 		return -EINVAL;  in mchp_tc_count_cap_write()
309 	u32 cnt;  in mchp_tc_count_compare_read()  local
312 	ret = regmap_read(priv->regmap, ATMEL_TC_REG(priv->channel[0], RC), &cnt);  in mchp_tc_count_compare_read()
316 	*val = cnt;  in mchp_tc_count_compare_read()
327 		return -ERANGE;  in mchp_tc_count_compare_write()
329 	return regmap_write(priv->regmap, ATMEL_TC_REG(priv->channel[0], RC), val);  in mchp_tc_count_compare_write()
343 	if (watch->channel == COUNTER_MCHP_EVCHN_CV || watch->channel == COUNTER_MCHP_EVCHN_RA)  in mchp_tc_watch_validate()
344 		switch (watch->event) {  in mchp_tc_watch_validate()
350 			return -EINVAL;  in mchp_tc_watch_validate()
353 	if (watch->channel == COUNTER_MCHP_EVCHN_RB && watch->event == COUNTER_EVENT_CAPTURE)  in mchp_tc_watch_validate()
356 	if (watch->channel == COUNTER_MCHP_EVCHN_RC && watch->event == COUNTER_EVENT_THRESHOLD)  in mchp_tc_watch_validate()
359 	return -EINVAL;  in mchp_tc_watch_validate()
365 		.name = "Timer Counter",
405 	{ .compatible = "atmel,at91rm9200-tcb", .data = &tcb_rm9200_config, },
406 	{ .compatible = "atmel,at91sam9x5-tcb", .data = &tcb_sam9x5_config, },
407 	{ .compatible = "atmel,sama5d2-tcb", .data = &tcb_sama5d2_config, },
408 	{ .compatible = "atmel,sama5d3-tcb", .data = &tcb_sama5d3_config, },
418 	regmap_read(priv->regmap, ATMEL_TC_REG(priv->channel[0], SR), &sr);  in mchp_tc_isr()
419 	regmap_read(priv->regmap, ATMEL_TC_REG(priv->channel[0], IMR), &mask);  in mchp_tc_isr()
448 	regmap_write(priv->regmap, ATMEL_TC_REG(priv->channel[0], IDR), ATMEL_TC_DEF_IRQS);  in mchp_tc_irq_remove()
454 	int ret = devm_request_irq(counter->parent, irq, mchp_tc_isr, 0,  in mchp_tc_irq_enable()
455 				   dev_name(counter->parent), counter);  in mchp_tc_irq_enable()
460 	ret = regmap_write(priv->regmap, ATMEL_TC_REG(priv->channel[0], IER), ATMEL_TC_DEF_IRQS);  in mchp_tc_irq_enable()
464 	ret = devm_add_action_or_reset(counter->parent, mchp_tc_irq_remove, priv);  in mchp_tc_irq_enable()
478 	struct device_node *np = pdev->dev.of_node;  in mchp_tc_probe()
489 	counter = devm_counter_alloc(&pdev->dev, sizeof(*priv));  in mchp_tc_probe()
491 		return -ENOMEM;  in mchp_tc_probe()
494 	match = of_match_node(atmel_tc_of_match, np->parent);  in mchp_tc_probe()
495 	tcb_config = match->data;  in mchp_tc_probe()
497 		dev_err(&pdev->dev, "No matching parent node found\n");  in mchp_tc_probe()
498 		return -ENODEV;  in mchp_tc_probe()
501 	regmap = syscon_node_to_regmap(np->parent);  in mchp_tc_probe()
506 	priv->num_channels = of_property_count_u32_elems(np, "reg");  in mchp_tc_probe()
507 	if (priv->num_channels < 0) {  in mchp_tc_probe()
508 		dev_err(&pdev->dev, "Invalid or missing channel\n");  in mchp_tc_probe()
509 		return -EINVAL;  in mchp_tc_probe()
513 	for (i = 0; i < priv->num_channels; i++) {  in mchp_tc_probe()
516 			return -ENODEV;  in mchp_tc_probe()
518 		priv->channel[i] = channel;  in mchp_tc_probe()
522 		clk[i] = of_clk_get_by_name(np->parent, clk_name);  in mchp_tc_probe()
525 			clk[i] = of_clk_get_by_name(np->parent, "t0_clk");  in mchp_tc_probe()
534 		ret = devm_add_action_or_reset(&pdev->dev,  in mchp_tc_probe()
540 		dev_dbg(&pdev->dev,  in mchp_tc_probe()
551 	ret = regmap_update_bits(regmap, ATMEL_TC_REG(priv->channel[0], CMR),  in mchp_tc_probe()
559 	ret = regmap_write(regmap, ATMEL_TC_REG(priv->channel[0], CCR),  in mchp_tc_probe()
564 	priv->tc_cfg = tcb_config;  in mchp_tc_probe()
565 	priv->regmap = regmap;  in mchp_tc_probe()
566 	counter->name = dev_name(&pdev->dev);  in mchp_tc_probe()
567 	counter->parent = &pdev->dev;  in mchp_tc_probe()
568 	counter->ops = &mchp_tc_ops;  in mchp_tc_probe()
569 	counter->num_counts = ARRAY_SIZE(mchp_tc_counts);  in mchp_tc_probe()
570 	counter->counts = mchp_tc_counts;  in mchp_tc_probe()
571 	counter->num_signals = ARRAY_SIZE(mchp_tc_count_signals);  in mchp_tc_probe()
572 	counter->signals = mchp_tc_count_signals;  in mchp_tc_probe()
574 	i = of_irq_get(np->parent, 0);  in mchp_tc_probe()
575 	if (i == -EPROBE_DEFER)  in mchp_tc_probe()
576 		return -EPROBE_DEFER;  in mchp_tc_probe()
580 			return dev_err_probe(&pdev->dev, ret, "Failed to set up IRQ");  in mchp_tc_probe()
583 	ret = devm_counter_add(&pdev->dev, counter);  in mchp_tc_probe()
585 		return dev_err_probe(&pdev->dev, ret, "Failed to add counter\n");  in mchp_tc_probe()
591 	{ .compatible = "microchip,tcb-capture", },
599 		.name = "microchip-tcb-capture",