1 // SPDX-License-Identifier: GPL-2.0-only
5  * Copyright (C) 2011-2012 Texas Instruments, Inc.
24 #include "vp.h"
27 #include "prm-regbits-44xx.h"
67  * omap44xx_prm_reset_src_map - map from bits in the PRM_RSTST
69  *   source ID bit shifts (which is an OMAP SoC-independent
90 	{ -1, -1 },
93 /* PRM low-level functions */
107 /* Read-modify-write a register in a PRM module. Caller must lock */
120 /* PRM VP */
123  * struct omap4_vp - OMAP4 VP register access description.
124  * @irqstatus_mpu: offset to IRQSTATUS_MPU register for VP
149 	struct omap4_vp *vp = &omap4_vp[vp_id];  in omap4_prm_vp_check_txdone()  local
154 						vp->irqstatus_mpu);  in omap4_prm_vp_check_txdone()
155 	return irqstatus & vp->tranxdone_status;  in omap4_prm_vp_check_txdone()
160 	struct omap4_vp *vp = &omap4_vp[vp_id];  in omap4_prm_vp_clear_txdone()  local
162 	omap4_prminst_write_inst_reg(vp->tranxdone_status,  in omap4_prm_vp_clear_txdone()
165 				     vp->irqstatus_mpu);  in omap4_prm_vp_clear_txdone()
216  * omap44xx_prm_read_pending_irqs - read pending PRM MPU IRQs into @events
219  * Read PRM_IRQSTATUS_MPU* bits, AND'ed with the currently-enabled PRM
233  * omap44xx_prm_ocp_barrier - force buffered MPU writes to the PRM to complete
247  * omap44xx_prm_save_and_clear_irqen - save/clear PRM_IRQENABLE_MPU* regs
277  * omap44xx_prm_restore_irqen - set PRM_IRQENABLE_MPU* registers from args
297  * omap44xx_prm_reconfigure_io_chain - clear latches and reconfigure I/O chain
299  * Clear any previously-latched I/O wakeup events and ensure that the
344  * omap44xx_prm_enable_io_wakeup - enable wakeup events from I/O wakeup latches
365  * omap44xx_prm_read_reset_sources - return the last SoC reset source
372 	struct prm_reset_src_map *p;  in omap44xx_prm_read_reset_sources()  local
384 	p = omap44xx_prm_reset_src_map;  in omap44xx_prm_read_reset_sources()
385 	while (p->reg_shift >= 0 && p->std_shift >= 0) {  in omap44xx_prm_read_reset_sources()
386 		if (v & (1 << p->reg_shift))  in omap44xx_prm_read_reset_sources()
387 			r |= 1 << p->std_shift;  in omap44xx_prm_read_reset_sources()
388 		p++;  in omap44xx_prm_read_reset_sources()
395  * omap44xx_prm_was_any_context_lost_old - was module hardware context lost?
410  * omap44xx_prm_clear_context_loss_flags_old - clear context loss flags
425 /* Powerdomain low-level functions */
431 					pwrdm->prcm_partition,  in omap4_pwrdm_set_next_pwrst()
432 					pwrdm->prcm_offs, OMAP4_PM_PWSTCTRL);  in omap4_pwrdm_set_next_pwrst()
440 	v = omap4_prminst_read_inst_reg(pwrdm->prcm_partition, pwrdm->prcm_offs,  in omap4_pwrdm_read_next_pwrst()
452 	v = omap4_prminst_read_inst_reg(pwrdm->prcm_partition, pwrdm->prcm_offs,  in omap4_pwrdm_read_pwrst()
464 	v = omap4_prminst_read_inst_reg(pwrdm->prcm_partition, pwrdm->prcm_offs,  in omap4_pwrdm_read_prev_pwrst()
476 					pwrdm->prcm_partition,  in omap4_pwrdm_set_lowpwrstchange()
477 					pwrdm->prcm_offs, OMAP4_PM_PWSTCTRL);  in omap4_pwrdm_set_lowpwrstchange()
485 					pwrdm->prcm_partition,  in omap4_pwrdm_clear_all_prev_pwrst()
486 					pwrdm->prcm_offs, OMAP4_PM_PWSTST);  in omap4_pwrdm_clear_all_prev_pwrst()
496 					pwrdm->prcm_partition, pwrdm->prcm_offs,  in omap4_pwrdm_set_logic_retst()
510 					pwrdm->prcm_partition, pwrdm->prcm_offs,  in omap4_pwrdm_set_mem_onst()
524 					pwrdm->prcm_partition, pwrdm->prcm_offs,  in omap4_pwrdm_set_mem_retst()
534 	v = omap4_prminst_read_inst_reg(pwrdm->prcm_partition, pwrdm->prcm_offs,  in omap4_pwrdm_read_logic_pwrst()
546 	v = omap4_prminst_read_inst_reg(pwrdm->prcm_partition, pwrdm->prcm_offs,  in omap4_pwrdm_read_logic_retst()
555  * omap4_pwrdm_read_prev_logic_pwrst - read the previous logic powerstate
588 	v = omap4_prminst_read_inst_reg(pwrdm->prcm_partition, pwrdm->prcm_offs,  in omap4_pwrdm_read_mem_pwrst()
602 	v = omap4_prminst_read_inst_reg(pwrdm->prcm_partition, pwrdm->prcm_offs,  in omap4_pwrdm_read_mem_retst()
611  * omap4_pwrdm_read_prev_mem_pwrst - reads the previous memory powerstate
645 	 * via a callback and a periodic timer check -- how long do we expect  in omap4_pwrdm_wait_transition()
650 	while ((omap4_prminst_read_inst_reg(pwrdm->prcm_partition,  in omap4_pwrdm_wait_transition()
651 					    pwrdm->prcm_offs,  in omap4_pwrdm_wait_transition()
659 		       pwrdm->name);  in omap4_pwrdm_wait_transition()
660 		return -EAGAIN;  in omap4_pwrdm_wait_transition()
677  * omap4_pwrdm_save_context - Saves the powerdomain state
685 	pwrdm->context = omap4_prminst_read_inst_reg(pwrdm->prcm_partition,  in omap4_pwrdm_save_context()
686 						     pwrdm->prcm_offs,  in omap4_pwrdm_save_context()
687 						     pwrdm->pwrstctrl_offs);  in omap4_pwrdm_save_context()
693 	pwrdm->context &= ~OMAP4430_LOWPOWERSTATECHANGE_MASK;  in omap4_pwrdm_save_context()
697  * omap4_pwrdm_restore_context - Restores the powerdomain state
707 	st = omap4_prminst_read_inst_reg(pwrdm->prcm_partition,  in omap4_pwrdm_restore_context()
708 					 pwrdm->prcm_offs,  in omap4_pwrdm_restore_context()
709 					 pwrdm->pwrstctrl_offs);  in omap4_pwrdm_restore_context()
711 	omap4_prminst_write_inst_reg(pwrdm->context,  in omap4_pwrdm_restore_context()
712 				     pwrdm->prcm_partition,  in omap4_pwrdm_restore_context()
713 				     pwrdm->prcm_offs,  in omap4_pwrdm_restore_context()
714 				     pwrdm->pwrstctrl_offs);  in omap4_pwrdm_restore_context()
718 	ctrl = OMAP_POWERSTATEST_MASK & pwrdm->context;  in omap4_pwrdm_restore_context()
811 	if (data->flags & PRM_HAS_IO_WAKEUP)  in omap44xx_prm_init()
814 	if (data->flags & PRM_HAS_VOLTAGE)  in omap44xx_prm_init()
817 	omap4_prminst_set_prm_dev_inst(data->device_inst_offset);  in omap44xx_prm_init()
820 	if (of_device_is_compatible(data->np, "ti,am4-prcm")) {  in omap44xx_prm_init()
828 	/* Only AM43XX can lose prm context during rtc-ddr suspend */  in omap44xx_prm_init()
844 	irq_num = of_irq_get(prm_init_data->np, 0);  in omap44xx_prm_late_init()
845 	if (irq_num == -EPROBE_DEFER)  in omap44xx_prm_late_init()