5  * Tero Kristo <t-kristo@ti.com>
28 #include <linux/clk-provider.h>
31 #include "soc.h"
49  * actual amount of memory needed for the SoC
74  * prm_ll_data: function pointers to SoC-specific implementations of
90 	for (i = 0; i < prcm_irq_setup->nr_regs; i++) {  in omap_prcm_events_filter_priority()
92 			events[i] & prcm_irq_setup->priority_mask[i];  in omap_prcm_events_filter_priority()
103  * done by the SoC specific individual handlers.
111 	int nr_irq = prcm_irq_setup->nr_regs * 32;  in omap_prcm_irq_handler()
114 	 * If we are suspended, mask all interrupts from PRCM level,  in omap_prcm_irq_handler()
116 	 * re-enable the interrupts, at which point the  in omap_prcm_irq_handler()
123 	if (prcm_irq_setup->suspended) {  in omap_prcm_irq_handler()
124 		prcm_irq_setup->save_and_clear_irqen(prcm_irq_setup->saved_mask);  in omap_prcm_irq_handler()
125 		prcm_irq_setup->suspend_save_flag = true;  in omap_prcm_irq_handler()
132 	while (!prcm_irq_setup->suspended) {  in omap_prcm_irq_handler()
133 		prcm_irq_setup->read_pending_irqs(pending);  in omap_prcm_irq_handler()
148 			generic_handle_irq(prcm_irq_setup->base_irq + virtirq);  in omap_prcm_irq_handler()
152 			generic_handle_irq(prcm_irq_setup->base_irq + virtirq);  in omap_prcm_irq_handler()
154 	if (chip->irq_ack)  in omap_prcm_irq_handler()
155 		chip->irq_ack(&desc->irq_data);  in omap_prcm_irq_handler()
156 	if (chip->irq_eoi)  in omap_prcm_irq_handler()
157 		chip->irq_eoi(&desc->irq_data);  in omap_prcm_irq_handler()
158 	chip->irq_unmask(&desc->irq_data);  in omap_prcm_irq_handler()
160 	prcm_irq_setup->ocp_barrier(); /* avoid spurious IRQs */  in omap_prcm_irq_handler()
166  * omap_prcm_event_to_irq - given a PRCM event name, returns the
168  * @name: name of the PRCM interrupt bit to look up - see struct omap_prcm_irq
171  * or -ENOENT upon failure.
178 		return -ENOENT;  in omap_prcm_event_to_irq()
180 	for (i = 0; i < prcm_irq_setup->nr_irqs; i++)  in omap_prcm_event_to_irq()
181 		if (!strcmp(prcm_irq_setup->irqs[i].name, name))  in omap_prcm_event_to_irq()
182 			return prcm_irq_setup->base_irq +  in omap_prcm_event_to_irq()
183 				prcm_irq_setup->irqs[i].offset;  in omap_prcm_event_to_irq()
185 	return -ENOENT;  in omap_prcm_event_to_irq()
189  * omap_prcm_irq_cleanup - reverses memory allocated and other steps
205 		for (i = 0; i < prcm_irq_setup->nr_regs; i++) {  in omap_prcm_irq_cleanup()
215 	kfree(prcm_irq_setup->saved_mask);  in omap_prcm_irq_cleanup()
216 	prcm_irq_setup->saved_mask = NULL;  in omap_prcm_irq_cleanup()
218 	kfree(prcm_irq_setup->priority_mask);  in omap_prcm_irq_cleanup()
219 	prcm_irq_setup->priority_mask = NULL;  in omap_prcm_irq_cleanup()
221 	irq = prcm_irq_setup->irq;  in omap_prcm_irq_cleanup()
224 	if (prcm_irq_setup->base_irq > 0)  in omap_prcm_irq_cleanup()
225 		irq_free_descs(prcm_irq_setup->base_irq,  in omap_prcm_irq_cleanup()
226 			prcm_irq_setup->nr_regs * 32);  in omap_prcm_irq_cleanup()
227 	prcm_irq_setup->base_irq = 0;  in omap_prcm_irq_cleanup()
232 	prcm_irq_setup->suspended = true;  in omap_prcm_irq_prepare()
237 	prcm_irq_setup->suspended = false;  in omap_prcm_irq_complete()
240 	if (!prcm_irq_setup->suspend_save_flag)  in omap_prcm_irq_complete()
243 	prcm_irq_setup->suspend_save_flag = false;  in omap_prcm_irq_complete()
246 	 * Re-enable all masked PRCM irq sources, this causes the PRCM  in omap_prcm_irq_complete()
250 	prcm_irq_setup->restore_irqen(prcm_irq_setup->saved_mask);  in omap_prcm_irq_complete()
254  * omap_prcm_register_chain_handler - initializes the prcm chained interrupt
260  * Returns 0 upon success, -EINVAL if called twice or if invalid
261  * arguments are passed, or -ENOMEM on any other error.
272 		return -EINVAL;  in omap_prcm_register_chain_handler()
274 	nr_regs = irq_setup->nr_regs;  in omap_prcm_register_chain_handler()
278 		return -EINVAL;  in omap_prcm_register_chain_handler()
283 		return -EINVAL;  in omap_prcm_register_chain_handler()
289 	prcm_irq_setup->saved_mask = kcalloc(nr_regs, sizeof(u32),  in omap_prcm_register_chain_handler()
291 	prcm_irq_setup->priority_mask = kcalloc(nr_regs, sizeof(u32),  in omap_prcm_register_chain_handler()
294 	if (!prcm_irq_chips || !prcm_irq_setup->saved_mask ||  in omap_prcm_register_chain_handler()
295 	    !prcm_irq_setup->priority_mask)  in omap_prcm_register_chain_handler()
300 	for (i = 0; i < irq_setup->nr_irqs; i++) {  in omap_prcm_register_chain_handler()
301 		offset = irq_setup->irqs[i].offset;  in omap_prcm_register_chain_handler()
303 		if (irq_setup->irqs[i].priority)  in omap_prcm_register_chain_handler()
304 			irq_setup->priority_mask[offset >> 5] |=  in omap_prcm_register_chain_handler()
308 	irq = irq_setup->irq;  in omap_prcm_register_chain_handler()
311 	irq_setup->base_irq = irq_alloc_descs(-1, 0, irq_setup->nr_regs * 32,  in omap_prcm_register_chain_handler()
314 	if (irq_setup->base_irq < 0) {  in omap_prcm_register_chain_handler()
316 			irq_setup->base_irq);  in omap_prcm_register_chain_handler()
320 	for (i = 0; i < irq_setup->nr_regs; i++) {  in omap_prcm_register_chain_handler()
322 			irq_setup->base_irq + i * 32, prm_base.va,  in omap_prcm_register_chain_handler()
329 		ct = gc->chip_types;  in omap_prcm_register_chain_handler()
330 		ct->chip.irq_ack = irq_gc_ack_set_bit;  in omap_prcm_register_chain_handler()
331 		ct->chip.irq_mask = irq_gc_mask_clr_bit;  in omap_prcm_register_chain_handler()
332 		ct->chip.irq_unmask = irq_gc_mask_set_bit;  in omap_prcm_register_chain_handler()
334 		ct->regs.ack = irq_setup->ack + i * 4;  in omap_prcm_register_chain_handler()
335 		ct->regs.mask = irq_setup->mask + i * 4;  in omap_prcm_register_chain_handler()
342 	omap_pcs_legacy_init(irq, irq_setup->reconfigure_io_chain);  in omap_prcm_register_chain_handler()
348 	return -ENOMEM;  in omap_prcm_register_chain_handler()
352  * omap2_set_globals_prm - set the PRM base address (for early use)
363  * prm_read_reset_sources - return the sources of the SoC's last reset
366  * SoC to reset.  The low-level per-SoC functions called by this
367  * function remap the SoC-specific reset source bits into an
368  * OMAP-common set of reset source bits, defined in
369  * arch/arm/mach-omap2/prm.h.  Returns the standardized reset source
371  * OMAP_UNKNOWN_RST_SRC_ID_SHIFT) if no low-level read_reset_sources()
378 	if (prm_ll_data->read_reset_sources)  in prm_read_reset_sources()
379 		ret = prm_ll_data->read_reset_sources();  in prm_read_reset_sources()
387  * prm_was_any_context_lost_old - was device context lost? (old API)
395  * callers need to use a less-SoC-dependent way to identify hardware
402 	if (prm_ll_data->was_any_context_lost_old)  in prm_was_any_context_lost_old()
403 		ret = prm_ll_data->was_any_context_lost_old(part, inst, idx);  in prm_was_any_context_lost_old()
412  * prm_clear_context_lost_flags_old - clear context loss flags (old API)
419  * need to use a less-SoC-dependent way to identify hardware IP
424 	if (prm_ll_data->clear_context_loss_flags_old)  in prm_clear_context_loss_flags_old()
425 		prm_ll_data->clear_context_loss_flags_old(part, inst, idx);  in prm_clear_context_loss_flags_old()
432  * omap_prm_assert_hardreset - assert hardreset for an IP block
442 	if (!prm_ll_data->assert_hardreset) {  in omap_prm_assert_hardreset()
445 		return -EINVAL;  in omap_prm_assert_hardreset()
448 	return prm_ll_data->assert_hardreset(shift, part, prm_mod, offset);  in omap_prm_assert_hardreset()
452  * omap_prm_deassert_hardreset - deassert hardreset for an IP block
465 	if (!prm_ll_data->deassert_hardreset) {  in omap_prm_deassert_hardreset()
468 		return -EINVAL;  in omap_prm_deassert_hardreset()
471 	return prm_ll_data->deassert_hardreset(shift, st_shift, part, prm_mod,  in omap_prm_deassert_hardreset()
476  * omap_prm_is_hardreset_asserted - check the hardreset status for an IP block
486 	if (!prm_ll_data->is_hardreset_asserted) {  in omap_prm_is_hardreset_asserted()
489 		return -EINVAL;  in omap_prm_is_hardreset_asserted()
492 	return prm_ll_data->is_hardreset_asserted(shift, part, prm_mod, offset);  in omap_prm_is_hardreset_asserted()
496  * omap_prm_reconfigure_io_chain - clear latches and reconfigure I/O chain
498  * Clear any previously-latched I/O wakeup events and ensure that the
500  * Calls SoC specific I/O chain reconfigure function if available,
505 	if (!prcm_irq_setup || !prcm_irq_setup->reconfigure_io_chain)  in omap_prm_reconfigure_io_chain()
508 	prcm_irq_setup->reconfigure_io_chain();  in omap_prm_reconfigure_io_chain()
512  * omap_prm_reset_system - trigger global SW reset
514  * Triggers SoC specific global warm reset to reboot the device.
518 	if (!prm_ll_data->reset_system) {  in omap_prm_reset_system()
524 	prm_ll_data->reset_system();  in omap_prm_reset_system()
533  * omap_prm_clear_mod_irqs - clear wake-up events from PRCM interrupt
539  * Uses SoC specific implementation to do the actual wakeup status
544 	if (!prm_ll_data->clear_mod_irqs) {  in omap_prm_clear_mod_irqs()
547 		return -EINVAL;  in omap_prm_clear_mod_irqs()
550 	return prm_ll_data->clear_mod_irqs(module, regs, wkst_mask);  in omap_prm_clear_mod_irqs()
554  * omap_prm_vp_check_txdone - check voltage processor TX done status
557  * Returns non-zero if a transmission has completed, 0 otherwise.
561 	if (!prm_ll_data->vp_check_txdone) {  in omap_prm_vp_check_txdone()
567 	return prm_ll_data->vp_check_txdone(vp_id);  in omap_prm_vp_check_txdone()
571  * omap_prm_vp_clear_txdone - clears voltage processor TX done status
578 	if (!prm_ll_data->vp_clear_txdone) {  in omap_prm_vp_clear_txdone()
584 	prm_ll_data->vp_clear_txdone(vp_id);  in omap_prm_vp_clear_txdone()
588  * prm_register - register per-SoC low-level data with the PRM
589  * @pld: low-level per-SoC OMAP PRM data & function pointers to register
591  * Register per-SoC low-level OMAP PRM data and function pointers with
594  * it returns successfully.  Returns 0 upon success, -EINVAL if @pld
595  * is NULL, or -EEXIST if prm_register() has already been called
601 		return -EINVAL;  in prm_register()
604 		return -EEXIST;  in prm_register()
612  * prm_unregister - unregister per-SoC low-level data & function pointers
613  * @pld: low-level per-SoC OMAP PRM data & function pointers to unregister
615  * Unregister per-SoC low-level OMAP PRM data and function pointers
619  * -EINVAL if @pld is NULL or if @pld does not match the struct
625 		return -EINVAL;  in prm_unregister()
648 	.offset = -OMAP3430_IVA2_MOD,
710 	{ .compatible = "ti,am3-prcm", .data = &am3_prm_data },
713 	{ .compatible = "ti,am4-prcm", .data = &am4_prm_data },
716 	{ .compatible = "ti,dm814-prcm", .data = &am3_prm_data },
717 	{ .compatible = "ti,dm814-pllss", .data = &dm814_pllss_data },
718 	{ .compatible = "ti,dm816-prcm", .data = &am3_prm_data },
721 	{ .compatible = "ti,omap2-prcm", .data = &omap2_prm_data },
724 	{ .compatible = "ti,omap3-prm", .data = &omap3_prm_data },
727 	{ .compatible = "ti,omap4-prm", .data = &omap4_prm_data },
728 	{ .compatible = "ti,omap4-scrm", .data = &scrm_data },
731 	{ .compatible = "ti,omap5-prm", .data = &omap5_prm_data },
732 	{ .compatible = "ti,omap5-scrm", .data = &scrm_data },
735 	{ .compatible = "ti,dra7-prm", .data = &dra7_prm_data },
741  * omap2_prm_base_init - initialize iomappings for the PRM driver
756 		data = (struct omap_prcm_init_data *)match->data;  in omap2_prm_base_init()
762 		data->mem = ioremap(res.start, resource_size(&res));  in omap2_prm_base_init()
764 		if (data->index == TI_CLKM_PRM) {  in omap2_prm_base_init()
765 			prm_base.va = data->mem + data->offset;  in omap2_prm_base_init()
766 			prm_base.pa = res.start + data->offset;  in omap2_prm_base_init()
769 		data->np = np;  in omap2_prm_base_init()
771 		if (data->init)  in omap2_prm_base_init()
772 			data->init(data);  in omap2_prm_base_init()
790  * omap_prcm_init - low level init for the PRCM drivers
792  * Initializes the low level clock infrastructure for PRCM drivers.
803 		data = match->data;  in omap_prcm_init()
805 		ret = omap2_clk_provider_init(np, data->index, NULL, data->mem);  in omap_prcm_init()
817 	if (prm_ll_data->late_init)  in prm_late_init()
818 		return prm_ll_data->late_init();  in prm_late_init()