1 // SPDX-License-Identifier: GPL-2.0-only
5  * Copyright (C) 2011-2012 Texas Instruments Incorporated - https://www.ti.com/
16 #include "prm-regbits-33xx.h"
34 /* Read-modify-write a register in PRM. Caller must lock */
48  * am33xx_prm_is_hardreset_asserted - read the HW reset line state of
57  * -EINVAL upon parameter error.
72  * am33xx_prm_assert_hardreset - assert the HW reset line of a submodule
78  * Some IPs like dsp, ipu or iva contain processors that require an HW
80  * IP.  These modules may have multiple hard-reset lines that reset
82  * place the submodule into reset.  Returns 0 upon success or -EINVAL
96  * am33xx_prm_deassert_hardreset - deassert a submodule hardreset line and
105  * Some IPs like dsp, ipu or iva contain processors that require an HW
107  * IP.  These modules may have multiple hard-reset lines that reset
111  * -EINVAL upon an argument error, -EEXIST if the submodule was already out
112  * of reset, or -EBUSY if the submodule did not exit reset promptly.
121 	/* Check the current status to avoid  de-asserting the line twice */  in am33xx_prm_deassert_hardreset()
123 		return -EEXIST;  in am33xx_prm_deassert_hardreset()
128 	/* de-assert the reset control line */  in am33xx_prm_deassert_hardreset()
138 	return (c == MAX_MODULE_HARDRESET_WAIT) ? -EBUSY : 0;  in am33xx_prm_deassert_hardreset()
145 				pwrdm->prcm_offs, pwrdm->pwrstctrl_offs);  in am33xx_pwrdm_set_next_pwrst()
153 	v = am33xx_prm_read_reg(pwrdm->prcm_offs,  pwrdm->pwrstctrl_offs);  in am33xx_pwrdm_read_next_pwrst()
164 	v = am33xx_prm_read_reg(pwrdm->prcm_offs, pwrdm->pwrstst_offs);  in am33xx_pwrdm_read_pwrst()
175 				pwrdm->prcm_offs, pwrdm->pwrstctrl_offs);  in am33xx_pwrdm_set_lowpwrstchange()
183 				pwrdm->prcm_offs, pwrdm->pwrstst_offs);  in am33xx_pwrdm_clear_all_prev_pwrst()
191 	m = pwrdm->logicretstate_mask;  in am33xx_pwrdm_set_logic_retst()
193 		return -EINVAL;  in am33xx_pwrdm_set_logic_retst()
196 				pwrdm->prcm_offs, pwrdm->pwrstctrl_offs);  in am33xx_pwrdm_set_logic_retst()
205 	v = am33xx_prm_read_reg(pwrdm->prcm_offs, pwrdm->pwrstst_offs);  in am33xx_pwrdm_read_logic_pwrst()
216 	m = pwrdm->logicretstate_mask;  in am33xx_pwrdm_read_logic_retst()
218 		return -EINVAL;  in am33xx_pwrdm_read_logic_retst()
220 	v = am33xx_prm_read_reg(pwrdm->prcm_offs, pwrdm->pwrstctrl_offs);  in am33xx_pwrdm_read_logic_retst()
232 	m = pwrdm->mem_on_mask[bank];  in am33xx_pwrdm_set_mem_onst()
234 		return -EINVAL;  in am33xx_pwrdm_set_mem_onst()
237 				pwrdm->prcm_offs, pwrdm->pwrstctrl_offs);  in am33xx_pwrdm_set_mem_onst()
247 	m = pwrdm->mem_ret_mask[bank];  in am33xx_pwrdm_set_mem_retst()
249 		return -EINVAL;  in am33xx_pwrdm_set_mem_retst()
252 				pwrdm->prcm_offs, pwrdm->pwrstctrl_offs);  in am33xx_pwrdm_set_mem_retst()
261 	m = pwrdm->mem_pwrst_mask[bank];  in am33xx_pwrdm_read_mem_pwrst()
263 		return -EINVAL;  in am33xx_pwrdm_read_mem_pwrst()
265 	v = am33xx_prm_read_reg(pwrdm->prcm_offs, pwrdm->pwrstst_offs);  in am33xx_pwrdm_read_mem_pwrst()
276 	m = pwrdm->mem_retst_mask[bank];  in am33xx_pwrdm_read_mem_retst()
278 		return -EINVAL;  in am33xx_pwrdm_read_mem_retst()
280 	v = am33xx_prm_read_reg(pwrdm->prcm_offs, pwrdm->pwrstctrl_offs);  in am33xx_pwrdm_read_mem_retst()
293 	 * via a callback and a periodic timer check -- how long do we expect  in am33xx_pwrdm_wait_transition()
298 	while ((am33xx_prm_read_reg(pwrdm->prcm_offs, pwrdm->pwrstst_offs)  in am33xx_pwrdm_wait_transition()
305 		       pwrdm->name);  in am33xx_pwrdm_wait_transition()
306 		return -EAGAIN;  in am33xx_pwrdm_wait_transition()
321  * am33xx_prm_global_warm_sw_reset - reboot the device via warm reset
339 	pwrdm->context = am33xx_prm_read_reg(pwrdm->prcm_offs,  in am33xx_pwrdm_save_context()
340 						pwrdm->pwrstctrl_offs);  in am33xx_pwrdm_save_context()
345 	pwrdm->context &= ~AM33XX_LOWPOWERSTATECHANGE_MASK;  in am33xx_pwrdm_save_context()
350 	int st, ctrl;  in am33xx_pwrdm_restore_context()  local
352 	st = am33xx_prm_read_reg(pwrdm->prcm_offs,  in am33xx_pwrdm_restore_context()
353 				 pwrdm->pwrstst_offs);  in am33xx_pwrdm_restore_context()
355 	am33xx_prm_write_reg(pwrdm->context, pwrdm->prcm_offs,  in am33xx_pwrdm_restore_context()
356 			     pwrdm->pwrstctrl_offs);  in am33xx_pwrdm_restore_context()
360 	ctrl = OMAP_POWERSTATEST_MASK & pwrdm->context;  in am33xx_pwrdm_restore_context()
362 	if (st != ctrl)  in am33xx_pwrdm_restore_context()