50 #include <clocksource/timer-ti-dm.h>
64  * omap_dm_timer_read_reg - read timer registers in posted and non-posted mode
65  * @timer:      timer pointer over which read operation to perform
72 static inline u32 omap_dm_timer_read_reg(struct omap_dm_timer *timer, u32 reg)  in omap_dm_timer_read_reg()  argument
75 	return __omap_dm_timer_read(timer, reg, timer->posted);  in omap_dm_timer_read_reg()
79  * omap_dm_timer_write_reg - write timer registers in posted and non-posted mode
80  * @timer:      timer pointer over which write operation is to perform
88 static void omap_dm_timer_write_reg(struct omap_dm_timer *timer, u32 reg,  in omap_dm_timer_write_reg()  argument
92 	__omap_dm_timer_write(timer, reg, value, timer->posted);  in omap_dm_timer_write_reg()
95 static void omap_timer_restore_context(struct omap_dm_timer *timer)  in omap_timer_restore_context()  argument
97 	omap_dm_timer_write_reg(timer, OMAP_TIMER_WAKEUP_EN_REG,  in omap_timer_restore_context()
98 				timer->context.twer);  in omap_timer_restore_context()
99 	omap_dm_timer_write_reg(timer, OMAP_TIMER_COUNTER_REG,  in omap_timer_restore_context()
100 				timer->context.tcrr);  in omap_timer_restore_context()
101 	omap_dm_timer_write_reg(timer, OMAP_TIMER_LOAD_REG,  in omap_timer_restore_context()
102 				timer->context.tldr);  in omap_timer_restore_context()
103 	omap_dm_timer_write_reg(timer, OMAP_TIMER_MATCH_REG,  in omap_timer_restore_context()
104 				timer->context.tmar);  in omap_timer_restore_context()
105 	omap_dm_timer_write_reg(timer, OMAP_TIMER_IF_CTRL_REG,  in omap_timer_restore_context()
106 				timer->context.tsicr);  in omap_timer_restore_context()
107 	writel_relaxed(timer->context.tier, timer->irq_ena);  in omap_timer_restore_context()
108 	omap_dm_timer_write_reg(timer, OMAP_TIMER_CTRL_REG,  in omap_timer_restore_context()
109 				timer->context.tclr);  in omap_timer_restore_context()
112 static int omap_dm_timer_reset(struct omap_dm_timer *timer)  in omap_dm_timer_reset()  argument
116 	if (timer->revision != 1)  in omap_dm_timer_reset()
119 	omap_dm_timer_write_reg(timer, OMAP_TIMER_IF_CTRL_REG, 0x06);  in omap_dm_timer_reset()
122 		l = __omap_dm_timer_read(timer,  in omap_dm_timer_reset()
127 		dev_err(&timer->pdev->dev, "Timer failed to reset\n");  in omap_dm_timer_reset()
131 	/* Configure timer for smart-idle mode */  in omap_dm_timer_reset()
132 	l = __omap_dm_timer_read(timer, OMAP_TIMER_OCP_CFG_OFFSET, 0);  in omap_dm_timer_reset()
134 	__omap_dm_timer_write(timer, OMAP_TIMER_OCP_CFG_OFFSET, l, 0);  in omap_dm_timer_reset()
136 	timer->posted = 0;  in omap_dm_timer_reset()
141 static int omap_dm_timer_of_set_source(struct omap_dm_timer *timer)  in omap_dm_timer_of_set_source()  argument
150 	if (!timer->fclk)  in omap_dm_timer_of_set_source()
153 	parent = clk_get(&timer->pdev->dev, NULL);  in omap_dm_timer_of_set_source()
158 	if (clk_is_match(parent, timer->fclk))  in omap_dm_timer_of_set_source()
161 	ret = clk_set_parent(timer->fclk, parent);  in omap_dm_timer_of_set_source()
170 static int omap_dm_timer_set_source(struct omap_dm_timer *timer, int source)  in omap_dm_timer_set_source()  argument
177 	if (unlikely(!timer) || IS_ERR(timer->fclk))  in omap_dm_timer_set_source()
194 	pdata = timer->pdev->dev.platform_data;  in omap_dm_timer_set_source()
202 		return pdata->set_timer_src(timer->pdev, source);  in omap_dm_timer_set_source()
206 	if (clk_hw_get_num_parents(__clk_get_hw(timer->fclk)) < 2)  in omap_dm_timer_set_source()
210 	parent = clk_get(&timer->pdev->dev, parent_name);  in omap_dm_timer_set_source()
216 	ret = clk_set_parent(timer->fclk, parent);  in omap_dm_timer_set_source()
226 static void omap_dm_timer_enable(struct omap_dm_timer *timer)  in omap_dm_timer_enable()  argument
230 	pm_runtime_get_sync(&timer->pdev->dev);  in omap_dm_timer_enable()
232 	if (!(timer->capability & OMAP_TIMER_ALWON)) {  in omap_dm_timer_enable()
233 		if (timer->get_context_loss_count) {  in omap_dm_timer_enable()
234 			c = timer->get_context_loss_count(&timer->pdev->dev);  in omap_dm_timer_enable()
235 			if (c != timer->ctx_loss_count) {  in omap_dm_timer_enable()
236 				omap_timer_restore_context(timer);  in omap_dm_timer_enable()
237 				timer->ctx_loss_count = c;  in omap_dm_timer_enable()
240 			omap_timer_restore_context(timer);  in omap_dm_timer_enable()
245 static void omap_dm_timer_disable(struct omap_dm_timer *timer)  in omap_dm_timer_disable()  argument
247 	pm_runtime_put_sync(&timer->pdev->dev);  in omap_dm_timer_disable()
250 static int omap_dm_timer_prepare(struct omap_dm_timer *timer)  in omap_dm_timer_prepare()  argument
258 	if (!(timer->capability & OMAP_TIMER_NEEDS_RESET)) {  in omap_dm_timer_prepare()
259 		timer->fclk = clk_get(&timer->pdev->dev, "fck");  in omap_dm_timer_prepare()
260 		if (WARN_ON_ONCE(IS_ERR(timer->fclk))) {  in omap_dm_timer_prepare()
261 			dev_err(&timer->pdev->dev, ": No fclk handle.\n");  in omap_dm_timer_prepare()
266 	omap_dm_timer_enable(timer);  in omap_dm_timer_prepare()
268 	if (timer->capability & OMAP_TIMER_NEEDS_RESET) {  in omap_dm_timer_prepare()
269 		rc = omap_dm_timer_reset(timer);  in omap_dm_timer_prepare()
271 			omap_dm_timer_disable(timer);  in omap_dm_timer_prepare()
276 	__omap_dm_timer_enable_posted(timer);  in omap_dm_timer_prepare()
277 	omap_dm_timer_disable(timer);  in omap_dm_timer_prepare()
279 	rc = omap_dm_timer_of_set_source(timer);  in omap_dm_timer_prepare()
281 		return omap_dm_timer_set_source(timer, OMAP_TIMER_SRC_32_KHZ);  in omap_dm_timer_prepare()
303 	struct omap_dm_timer *timer = NULL, *t;  in _omap_dm_timer_request()  local
332 				timer = t;  in _omap_dm_timer_request()
333 				timer->reserved = 1;  in _omap_dm_timer_request()
340 				 * If timer is not NULL, we have already found  in _omap_dm_timer_request()
341 				 * one timer. But it was not an exact match  in _omap_dm_timer_request()
344 				 * timer found and see if this one is a better  in _omap_dm_timer_request()
347 				if (timer)  in _omap_dm_timer_request()
348 					timer->reserved = 0;  in _omap_dm_timer_request()
349 				timer = t;  in _omap_dm_timer_request()
350 				timer->reserved = 1;  in _omap_dm_timer_request()
359 				timer = t;  in _omap_dm_timer_request()
360 				timer->reserved = 1;  in _omap_dm_timer_request()
366 			timer = t;  in _omap_dm_timer_request()
367 			timer->reserved = 1;  in _omap_dm_timer_request()
374 	if (timer && omap_dm_timer_prepare(timer)) {  in _omap_dm_timer_request()
375 		timer->reserved = 0;  in _omap_dm_timer_request()
376 		timer = NULL;  in _omap_dm_timer_request()
379 	if (!timer)  in _omap_dm_timer_request()
380 		pr_debug("%s: timer request failed!\n", __func__);  in _omap_dm_timer_request()
382 	return timer;  in _omap_dm_timer_request()
392 	/* Requesting timer by ID is not supported when device tree is used */  in omap_dm_timer_request_specific()
403  * omap_dm_timer_request_by_cap - Request a timer by capability
406  * Find a timer based upon capabilities bit mask. Callers of this function
408  * comment "timer capabilities used in hwmod database". Returns pointer to
409  * timer handle on success and a NULL pointer on failure.
417  * omap_dm_timer_request_by_node - Request a timer by device-tree node
418  * @np:		Pointer to device-tree timer node
420  * Request a timer based upon a device node pointer. Returns pointer to
421  * timer handle on success and a NULL pointer on failure.
431 static int omap_dm_timer_free(struct omap_dm_timer *timer)  in omap_dm_timer_free()  argument
433 	if (unlikely(!timer))  in omap_dm_timer_free()
436 	clk_put(timer->fclk);  in omap_dm_timer_free()
438 	WARN_ON(!timer->reserved);  in omap_dm_timer_free()
439 	timer->reserved = 0;  in omap_dm_timer_free()
443 int omap_dm_timer_get_irq(struct omap_dm_timer *timer)  in omap_dm_timer_get_irq()  argument
445 	if (timer)  in omap_dm_timer_get_irq()
446 		return timer->irq;  in omap_dm_timer_get_irq()
453 static struct clk *omap_dm_timer_get_fclk(struct omap_dm_timer *timer)  in omap_dm_timer_get_fclk()  argument
465 	struct omap_dm_timer *timer = NULL;  in omap_dm_timer_modify_idlect_mask()  local
472 	/* If any active timer is using ARMXOR return modified mask */  in omap_dm_timer_modify_idlect_mask()
474 	list_for_each_entry(timer, &omap_timer_list, node) {  in omap_dm_timer_modify_idlect_mask()
477 		l = omap_dm_timer_read_reg(timer, OMAP_TIMER_CTRL_REG);  in omap_dm_timer_modify_idlect_mask()
493 static struct clk *omap_dm_timer_get_fclk(struct omap_dm_timer *timer)  in omap_dm_timer_get_fclk()  argument
495 	if (timer && !IS_ERR(timer->fclk))  in omap_dm_timer_get_fclk()
496 		return timer->fclk;  in omap_dm_timer_get_fclk()
509 int omap_dm_timer_trigger(struct omap_dm_timer *timer)  in omap_dm_timer_trigger()  argument
511 	if (unlikely(!timer || pm_runtime_suspended(&timer->pdev->dev))) {  in omap_dm_timer_trigger()
512 		pr_err("%s: timer not available or enabled.\n", __func__);  in omap_dm_timer_trigger()
516 	omap_dm_timer_write_reg(timer, OMAP_TIMER_TRIGGER_REG, 0);  in omap_dm_timer_trigger()
520 static int omap_dm_timer_start(struct omap_dm_timer *timer)  in omap_dm_timer_start()  argument
524 	if (unlikely(!timer))  in omap_dm_timer_start()
527 	omap_dm_timer_enable(timer);  in omap_dm_timer_start()
529 	l = omap_dm_timer_read_reg(timer, OMAP_TIMER_CTRL_REG);  in omap_dm_timer_start()
532 		omap_dm_timer_write_reg(timer, OMAP_TIMER_CTRL_REG, l);  in omap_dm_timer_start()
536 	timer->context.tclr = l;  in omap_dm_timer_start()
540 static int omap_dm_timer_stop(struct omap_dm_timer *timer)  in omap_dm_timer_stop()  argument
544 	if (unlikely(!timer))  in omap_dm_timer_stop()
547 	if (!(timer->capability & OMAP_TIMER_NEEDS_RESET))  in omap_dm_timer_stop()
548 		rate = clk_get_rate(timer->fclk);  in omap_dm_timer_stop()
550 	__omap_dm_timer_stop(timer, timer->posted, rate);  in omap_dm_timer_stop()
557 	timer->context.tclr =  in omap_dm_timer_stop()
558 			omap_dm_timer_read_reg(timer, OMAP_TIMER_CTRL_REG);  in omap_dm_timer_stop()
559 	omap_dm_timer_disable(timer);  in omap_dm_timer_stop()
563 static int omap_dm_timer_set_load(struct omap_dm_timer *timer, int autoreload,  in omap_dm_timer_set_load()  argument
568 	if (unlikely(!timer))  in omap_dm_timer_set_load()
571 	omap_dm_timer_enable(timer);  in omap_dm_timer_set_load()
572 	l = omap_dm_timer_read_reg(timer, OMAP_TIMER_CTRL_REG);  in omap_dm_timer_set_load()
577 	omap_dm_timer_write_reg(timer, OMAP_TIMER_CTRL_REG, l);  in omap_dm_timer_set_load()
578 	omap_dm_timer_write_reg(timer, OMAP_TIMER_LOAD_REG, load);  in omap_dm_timer_set_load()
580 	omap_dm_timer_write_reg(timer, OMAP_TIMER_TRIGGER_REG, 0);  in omap_dm_timer_set_load()
582 	timer->context.tclr = l;  in omap_dm_timer_set_load()
583 	timer->context.tldr = load;  in omap_dm_timer_set_load()
584 	omap_dm_timer_disable(timer);  in omap_dm_timer_set_load()
589 int omap_dm_timer_set_load_start(struct omap_dm_timer *timer, int autoreload,  in omap_dm_timer_set_load_start()  argument
594 	if (unlikely(!timer))  in omap_dm_timer_set_load_start()
597 	omap_dm_timer_enable(timer);  in omap_dm_timer_set_load_start()
599 	l = omap_dm_timer_read_reg(timer, OMAP_TIMER_CTRL_REG);  in omap_dm_timer_set_load_start()
602 		omap_dm_timer_write_reg(timer, OMAP_TIMER_LOAD_REG, load);  in omap_dm_timer_set_load_start()
608 	__omap_dm_timer_load_start(timer, l, load, timer->posted);  in omap_dm_timer_set_load_start()
611 	timer->context.tclr = l;  in omap_dm_timer_set_load_start()
612 	timer->context.tldr = load;  in omap_dm_timer_set_load_start()
613 	timer->context.tcrr = load;  in omap_dm_timer_set_load_start()
616 static int omap_dm_timer_set_match(struct omap_dm_timer *timer, int enable,  in omap_dm_timer_set_match()  argument
621 	if (unlikely(!timer))  in omap_dm_timer_set_match()
624 	omap_dm_timer_enable(timer);  in omap_dm_timer_set_match()
625 	l = omap_dm_timer_read_reg(timer, OMAP_TIMER_CTRL_REG);  in omap_dm_timer_set_match()
630 	omap_dm_timer_write_reg(timer, OMAP_TIMER_MATCH_REG, match);  in omap_dm_timer_set_match()
631 	omap_dm_timer_write_reg(timer, OMAP_TIMER_CTRL_REG, l);  in omap_dm_timer_set_match()
634 	timer->context.tclr = l;  in omap_dm_timer_set_match()
635 	timer->context.tmar = match;  in omap_dm_timer_set_match()
636 	omap_dm_timer_disable(timer);  in omap_dm_timer_set_match()
640 static int omap_dm_timer_set_pwm(struct omap_dm_timer *timer, int def_on,  in omap_dm_timer_set_pwm()  argument
645 	if (unlikely(!timer))  in omap_dm_timer_set_pwm()
648 	omap_dm_timer_enable(timer);  in omap_dm_timer_set_pwm()
649 	l = omap_dm_timer_read_reg(timer, OMAP_TIMER_CTRL_REG);  in omap_dm_timer_set_pwm()
657 	omap_dm_timer_write_reg(timer, OMAP_TIMER_CTRL_REG, l);  in omap_dm_timer_set_pwm()
660 	timer->context.tclr = l;  in omap_dm_timer_set_pwm()
661 	omap_dm_timer_disable(timer);  in omap_dm_timer_set_pwm()
665 static int omap_dm_timer_set_prescaler(struct omap_dm_timer *timer,  in omap_dm_timer_set_prescaler()  argument
670 	if (unlikely(!timer) || prescaler < -1 || prescaler > 7)  in omap_dm_timer_set_prescaler()
673 	omap_dm_timer_enable(timer);  in omap_dm_timer_set_prescaler()
674 	l = omap_dm_timer_read_reg(timer, OMAP_TIMER_CTRL_REG);  in omap_dm_timer_set_prescaler()
680 	omap_dm_timer_write_reg(timer, OMAP_TIMER_CTRL_REG, l);  in omap_dm_timer_set_prescaler()
683 	timer->context.tclr = l;  in omap_dm_timer_set_prescaler()
684 	omap_dm_timer_disable(timer);  in omap_dm_timer_set_prescaler()
688 static int omap_dm_timer_set_int_enable(struct omap_dm_timer *timer,  in omap_dm_timer_set_int_enable()  argument
691 	if (unlikely(!timer))  in omap_dm_timer_set_int_enable()
694 	omap_dm_timer_enable(timer);  in omap_dm_timer_set_int_enable()
695 	__omap_dm_timer_int_enable(timer, value);  in omap_dm_timer_set_int_enable()
698 	timer->context.tier = value;  in omap_dm_timer_set_int_enable()
699 	timer->context.twer = value;  in omap_dm_timer_set_int_enable()
700 	omap_dm_timer_disable(timer);  in omap_dm_timer_set_int_enable()
705  * omap_dm_timer_set_int_disable - disable timer interrupts
706  * @timer:	pointer to timer handle
709  * Disables the specified timer interrupts for a timer.
711 static int omap_dm_timer_set_int_disable(struct omap_dm_timer *timer, u32 mask)  in omap_dm_timer_set_int_disable()  argument
715 	if (unlikely(!timer))  in omap_dm_timer_set_int_disable()
718 	omap_dm_timer_enable(timer);  in omap_dm_timer_set_int_disable()
720 	if (timer->revision == 1)  in omap_dm_timer_set_int_disable()
721 		l = readl_relaxed(timer->irq_ena) & ~mask;  in omap_dm_timer_set_int_disable()
723 	writel_relaxed(l, timer->irq_dis);  in omap_dm_timer_set_int_disable()
724 	l = omap_dm_timer_read_reg(timer, OMAP_TIMER_WAKEUP_EN_REG) & ~mask;  in omap_dm_timer_set_int_disable()
725 	omap_dm_timer_write_reg(timer, OMAP_TIMER_WAKEUP_EN_REG, l);  in omap_dm_timer_set_int_disable()
728 	timer->context.tier &= ~mask;  in omap_dm_timer_set_int_disable()
729 	timer->context.twer &= ~mask;  in omap_dm_timer_set_int_disable()
730 	omap_dm_timer_disable(timer);  in omap_dm_timer_set_int_disable()
734 static unsigned int omap_dm_timer_read_status(struct omap_dm_timer *timer)  in omap_dm_timer_read_status()  argument
738 	if (unlikely(!timer || pm_runtime_suspended(&timer->pdev->dev))) {  in omap_dm_timer_read_status()
739 		pr_err("%s: timer not available or enabled.\n", __func__);  in omap_dm_timer_read_status()
743 	l = readl_relaxed(timer->irq_stat);  in omap_dm_timer_read_status()
748 static int omap_dm_timer_write_status(struct omap_dm_timer *timer, unsigned int value)  in omap_dm_timer_write_status()  argument
750 	if (unlikely(!timer || pm_runtime_suspended(&timer->pdev->dev)))  in omap_dm_timer_write_status()
753 	__omap_dm_timer_write_status(timer, value);  in omap_dm_timer_write_status()
758 static unsigned int omap_dm_timer_read_counter(struct omap_dm_timer *timer)  in omap_dm_timer_read_counter()  argument
760 	if (unlikely(!timer || pm_runtime_suspended(&timer->pdev->dev))) {  in omap_dm_timer_read_counter()
761 		pr_err("%s: timer not iavailable or enabled.\n", __func__);  in omap_dm_timer_read_counter()
765 	return __omap_dm_timer_read_counter(timer, timer->posted);  in omap_dm_timer_read_counter()
768 static int omap_dm_timer_write_counter(struct omap_dm_timer *timer, unsigned int value)  in omap_dm_timer_write_counter()  argument
770 	if (unlikely(!timer || pm_runtime_suspended(&timer->pdev->dev))) {  in omap_dm_timer_write_counter()
771 		pr_err("%s: timer not available or enabled.\n", __func__);  in omap_dm_timer_write_counter()
775 	omap_dm_timer_write_reg(timer, OMAP_TIMER_COUNTER_REG, value);  in omap_dm_timer_write_counter()
778 	timer->context.tcrr = value;  in omap_dm_timer_write_counter()
784 	struct omap_dm_timer *timer;  in omap_dm_timers_active()  local
786 	list_for_each_entry(timer, &omap_timer_list, node) {  in omap_dm_timers_active()
787 		if (!timer->reserved)  in omap_dm_timers_active()
790 		if (omap_dm_timer_read_reg(timer, OMAP_TIMER_CTRL_REG) &  in omap_dm_timers_active()
802  * @pdev:	pointer to current timer platform device
805  * timer devices.
810 	struct omap_dm_timer *timer;  in omap_dm_timer_probe()  local
839 	timer = devm_kzalloc(dev, sizeof(*timer), GFP_KERNEL);  in omap_dm_timer_probe()
840 	if (!timer)  in omap_dm_timer_probe()
843 	timer->fclk = ERR_PTR(-ENODEV);  in omap_dm_timer_probe()
844 	timer->io_base = devm_ioremap_resource(dev, mem);  in omap_dm_timer_probe()
845 	if (IS_ERR(timer->io_base))  in omap_dm_timer_probe()
846 		return PTR_ERR(timer->io_base);  in omap_dm_timer_probe()
849 		if (of_find_property(dev->of_node, "ti,timer-alwon", NULL))  in omap_dm_timer_probe()
850 			timer->capability |= OMAP_TIMER_ALWON;  in omap_dm_timer_probe()
851 		if (of_find_property(dev->of_node, "ti,timer-dsp", NULL))  in omap_dm_timer_probe()
852 			timer->capability |= OMAP_TIMER_HAS_DSP_IRQ;  in omap_dm_timer_probe()
853 		if (of_find_property(dev->of_node, "ti,timer-pwm", NULL))  in omap_dm_timer_probe()
854 			timer->capability |= OMAP_TIMER_HAS_PWM;  in omap_dm_timer_probe()
855 		if (of_find_property(dev->of_node, "ti,timer-secure", NULL))  in omap_dm_timer_probe()
856 			timer->capability |= OMAP_TIMER_SECURE;  in omap_dm_timer_probe()
858 		timer->id = pdev->id;  in omap_dm_timer_probe()
859 		timer->capability = pdata->timer_capability;  in omap_dm_timer_probe()
860 		timer->reserved = omap_dm_timer_reserved_systimer(timer->id);  in omap_dm_timer_probe()
861 		timer->get_context_loss_count = pdata->get_context_loss_count;  in omap_dm_timer_probe()
865 		timer->errata = pdata->timer_errata;  in omap_dm_timer_probe()
867 	timer->irq = irq->start;  in omap_dm_timer_probe()
868 	timer->pdev = pdev;  in omap_dm_timer_probe()
872 	if (!timer->reserved) {  in omap_dm_timer_probe()
879 		__omap_dm_timer_init_regs(timer);  in omap_dm_timer_probe()
883 	/* add the timer element to the list */  in omap_dm_timer_probe()
885 	list_add_tail(&timer->node, &omap_timer_list);  in omap_dm_timer_probe()
899  * omap_dm_timer_remove - cleanup a registered timer device
900  * @pdev:	pointer to current timer platform device
902  * Called by driver framework whenever a timer device is unregistered.
903  * In addition to freeing platform resources it also deletes the timer
908 	struct omap_dm_timer *timer;  in omap_dm_timer_remove()  local
913 	list_for_each_entry(timer, &omap_timer_list, node)  in omap_dm_timer_remove()
914 		if (!strcmp(dev_name(&timer->pdev->dev),  in omap_dm_timer_remove()
916 			list_del(&timer->node);  in omap_dm_timer_remove()
958 		.compatible = "ti,omap2420-timer",
961 		.compatible = "ti,omap3430-timer",
965 		.compatible = "ti,omap4430-timer",
969 		.compatible = "ti,omap5430-timer",
973 		.compatible = "ti,am335x-timer",
977 		.compatible = "ti,am335x-timer-1ms",
981 		.compatible = "ti,dm816-timer",
1000 MODULE_DESCRIPTION("OMAP Dual-Mode Timer Driver");