powerdomain.c (12627578523d2d9396cae76b1dad0ed3dccf1730) powerdomain.c (9b7fc907d9378f86eb6b823bbe84ec9ed584b091)
1/*
2 * OMAP powerdomain control
3 *
4 * Copyright (C) 2007-2008 Texas Instruments, Inc.
5 * Copyright (C) 2007-2009 Nokia Corporation
6 *
7 * Written by Paul Walmsley
8 * Added OMAP4 specific support by Abhijit Pagare <abhijitpagare@ti.com>
9 * State counting code by Tero Kristo <tero.kristo@nokia.com>
10 *
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License version 2 as
13 * published by the Free Software Foundation.
14 */
15#undef DEBUG
16
17#include <linux/kernel.h>
1/*
2 * OMAP powerdomain control
3 *
4 * Copyright (C) 2007-2008 Texas Instruments, Inc.
5 * Copyright (C) 2007-2009 Nokia Corporation
6 *
7 * Written by Paul Walmsley
8 * Added OMAP4 specific support by Abhijit Pagare <abhijitpagare@ti.com>
9 * State counting code by Tero Kristo <tero.kristo@nokia.com>
10 *
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License version 2 as
13 * published by the Free Software Foundation.
14 */
15#undef DEBUG
16
17#include <linux/kernel.h>
18#include <linux/module.h>
19#include <linux/types.h>
18#include <linux/types.h>
20#include <linux/delay.h>
21#include <linux/spinlock.h>
22#include <linux/list.h>
23#include <linux/errno.h>
19#include <linux/list.h>
20#include <linux/errno.h>
24#include <linux/err.h>
25#include <linux/io.h>
21#include <linux/string.h>
26
22
27#include <asm/atomic.h>
28
29#include "cm.h"
30#include "cm-regbits-34xx.h"
31#include "cm-regbits-44xx.h"
32#include "prm.h"
33#include "prm-regbits-34xx.h"
34#include "prm-regbits-44xx.h"
35
36#include <plat/cpu.h>
37#include <plat/powerdomain.h>
38#include <plat/clockdomain.h>
39#include <plat/prcm.h>
40
41#include "pm.h"
42
43enum {
44 PWRDM_STATE_NOW = 0,
45 PWRDM_STATE_PREV,
46};
47
23#include <plat/cpu.h>
24#include <plat/powerdomain.h>
25#include <plat/clockdomain.h>
26#include <plat/prcm.h>
27
28#include "pm.h"
29
30enum {
31 PWRDM_STATE_NOW = 0,
32 PWRDM_STATE_PREV,
33};
34
48/* Variable holding value of the CPU dependent PWRSTCTRL Register Offset */
49static u16 pwrstctrl_reg_offs;
50
35
51/* Variable holding value of the CPU dependent PWRSTST Register Offset */
52static u16 pwrstst_reg_offs;
53
54/* OMAP3 and OMAP4 specific register bit initialisations
55 * Notice that the names here are not according to each power
56 * domain but the bit mapping used applies to all of them
57 */
58
59/* OMAP3 and OMAP4 Memory Onstate Masks (common across all power domains) */
60#define OMAP_MEM0_ONSTATE_MASK OMAP3430_SHAREDL1CACHEFLATONSTATE_MASK
61#define OMAP_MEM1_ONSTATE_MASK OMAP3430_L1FLATMEMONSTATE_MASK
62#define OMAP_MEM2_ONSTATE_MASK OMAP3430_SHAREDL2CACHEFLATONSTATE_MASK
63#define OMAP_MEM3_ONSTATE_MASK OMAP3430_L2FLATMEMONSTATE_MASK
64#define OMAP_MEM4_ONSTATE_MASK OMAP4430_OCP_NRET_BANK_ONSTATE_MASK
65
66/* OMAP3 and OMAP4 Memory Retstate Masks (common across all power domains) */
67#define OMAP_MEM0_RETSTATE_MASK OMAP3430_SHAREDL1CACHEFLATRETSTATE_MASK
68#define OMAP_MEM1_RETSTATE_MASK OMAP3430_L1FLATMEMRETSTATE_MASK
69#define OMAP_MEM2_RETSTATE_MASK OMAP3430_SHAREDL2CACHEFLATRETSTATE_MASK
70#define OMAP_MEM3_RETSTATE_MASK OMAP3430_L2FLATMEMRETSTATE_MASK
71#define OMAP_MEM4_RETSTATE_MASK OMAP4430_OCP_NRET_BANK_RETSTATE_MASK
72
73/* OMAP3 and OMAP4 Memory Status bits */
74#define OMAP_MEM0_STATEST_MASK OMAP3430_SHAREDL1CACHEFLATSTATEST_MASK
75#define OMAP_MEM1_STATEST_MASK OMAP3430_L1FLATMEMSTATEST_MASK
76#define OMAP_MEM2_STATEST_MASK OMAP3430_SHAREDL2CACHEFLATSTATEST_MASK
77#define OMAP_MEM3_STATEST_MASK OMAP3430_L2FLATMEMSTATEST_MASK
78#define OMAP_MEM4_STATEST_MASK OMAP4430_OCP_NRET_BANK_STATEST_MASK
79
80/* pwrdm_list contains all registered struct powerdomains */
81static LIST_HEAD(pwrdm_list);
82
83static struct pwrdm_ops *arch_pwrdm;
84
85/* Private functions */
86
87static struct powerdomain *_pwrdm_lookup(const char *name)

--- 132 unchanged lines hidden (view full) ---

220 * and not null, all of the referenced powerdomains will be
221 * registered. No return value. XXX pwrdm_list is not really a
222 * "list"; it is an array. Rename appropriately.
223 */
224void pwrdm_init(struct powerdomain **pwrdm_list, struct pwrdm_ops *custom_funcs)
225{
226 struct powerdomain **p = NULL;
227
36/* pwrdm_list contains all registered struct powerdomains */
37static LIST_HEAD(pwrdm_list);
38
39static struct pwrdm_ops *arch_pwrdm;
40
41/* Private functions */
42
43static struct powerdomain *_pwrdm_lookup(const char *name)

--- 132 unchanged lines hidden (view full) ---

176 * and not null, all of the referenced powerdomains will be
177 * registered. No return value. XXX pwrdm_list is not really a
178 * "list"; it is an array. Rename appropriately.
179 */
180void pwrdm_init(struct powerdomain **pwrdm_list, struct pwrdm_ops *custom_funcs)
181{
182 struct powerdomain **p = NULL;
183
228 if (cpu_is_omap24xx() || cpu_is_omap34xx()) {
229 pwrstctrl_reg_offs = OMAP2_PM_PWSTCTRL;
230 pwrstst_reg_offs = OMAP2_PM_PWSTST;
231 } else if (cpu_is_omap44xx()) {
232 pwrstctrl_reg_offs = OMAP4_PM_PWSTCTRL;
233 pwrstst_reg_offs = OMAP4_PM_PWSTST;
234 } else {
235 printk(KERN_ERR "Power Domain struct not supported for " \
236 "this CPU\n");
237 return;
238 }
239
240 if (!custom_funcs)
241 WARN(1, "powerdomain: No custom pwrdm functions registered\n");
242 else
243 arch_pwrdm = custom_funcs;
244
245 if (pwrdm_list) {
246 for (p = pwrdm_list; *p; p++)
247 _pwrdm_register(*p);

--- 313 unchanged lines hidden (view full) ---

561 * types of memory, depending on the powerdomain. Returns -EINVAL if
562 * the powerdomain pointer is null or the target power state is not
563 * not supported for this memory bank, -EEXIST if the target memory
564 * bank does not exist or is not controllable, or returns 0 upon
565 * success.
566 */
567int pwrdm_set_mem_onst(struct powerdomain *pwrdm, u8 bank, u8 pwrst)
568{
184 if (!custom_funcs)
185 WARN(1, "powerdomain: No custom pwrdm functions registered\n");
186 else
187 arch_pwrdm = custom_funcs;
188
189 if (pwrdm_list) {
190 for (p = pwrdm_list; *p; p++)
191 _pwrdm_register(*p);

--- 313 unchanged lines hidden (view full) ---

505 * types of memory, depending on the powerdomain. Returns -EINVAL if
506 * the powerdomain pointer is null or the target power state is not
507 * not supported for this memory bank, -EEXIST if the target memory
508 * bank does not exist or is not controllable, or returns 0 upon
509 * success.
510 */
511int pwrdm_set_mem_onst(struct powerdomain *pwrdm, u8 bank, u8 pwrst)
512{
569 u32 m;
513 int ret = -EINVAL;
570
571 if (!pwrdm)
572 return -EINVAL;
573
574 if (pwrdm->banks < (bank + 1))
575 return -EEXIST;
576
577 if (!(pwrdm->pwrsts_mem_on[bank] & (1 << pwrst)))
578 return -EINVAL;
579
580 pr_debug("powerdomain: setting next memory powerstate for domain %s "
581 "bank %0x while pwrdm-ON to %0x\n", pwrdm->name, bank, pwrst);
582
514
515 if (!pwrdm)
516 return -EINVAL;
517
518 if (pwrdm->banks < (bank + 1))
519 return -EEXIST;
520
521 if (!(pwrdm->pwrsts_mem_on[bank] & (1 << pwrst)))
522 return -EINVAL;
523
524 pr_debug("powerdomain: setting next memory powerstate for domain %s "
525 "bank %0x while pwrdm-ON to %0x\n", pwrdm->name, bank, pwrst);
526
583 /*
584 * The register bit names below may not correspond to the
585 * actual names of the bits in each powerdomain's register,
586 * but the type of value returned is the same for each
587 * powerdomain.
588 */
589 switch (bank) {
590 case 0:
591 m = OMAP_MEM0_ONSTATE_MASK;
592 break;
593 case 1:
594 m = OMAP_MEM1_ONSTATE_MASK;
595 break;
596 case 2:
597 m = OMAP_MEM2_ONSTATE_MASK;
598 break;
599 case 3:
600 m = OMAP_MEM3_ONSTATE_MASK;
601 break;
602 case 4:
603 m = OMAP_MEM4_ONSTATE_MASK;
604 break;
605 default:
606 WARN_ON(1); /* should never happen */
607 return -EEXIST;
608 }
527 if (arch_pwrdm && arch_pwrdm->pwrdm_set_mem_onst)
528 ret = arch_pwrdm->pwrdm_set_mem_onst(pwrdm, bank, pwrst);
609
529
610 prm_rmw_mod_reg_bits(m, (pwrst << __ffs(m)),
611 pwrdm->prcm_offs, pwrstctrl_reg_offs);
612
613 return 0;
530 return ret;
614}
615
616/**
617 * pwrdm_set_mem_retst - set memory power state while powerdomain in RET
618 * @pwrdm: struct powerdomain * to set
619 * @bank: memory bank number to set (0-3)
620 * @pwrst: one of the PWRDM_POWER_* macros
621 *

--- 4 unchanged lines hidden (view full) ---

626 * will be either RETENTION or OFF, if supported. Returns -EINVAL if
627 * the powerdomain pointer is null or the target power state is not
628 * not supported for this memory bank, -EEXIST if the target memory
629 * bank does not exist or is not controllable, or returns 0 upon
630 * success.
631 */
632int pwrdm_set_mem_retst(struct powerdomain *pwrdm, u8 bank, u8 pwrst)
633{
531}
532
533/**
534 * pwrdm_set_mem_retst - set memory power state while powerdomain in RET
535 * @pwrdm: struct powerdomain * to set
536 * @bank: memory bank number to set (0-3)
537 * @pwrst: one of the PWRDM_POWER_* macros
538 *

--- 4 unchanged lines hidden (view full) ---

543 * will be either RETENTION or OFF, if supported. Returns -EINVAL if
544 * the powerdomain pointer is null or the target power state is not
545 * not supported for this memory bank, -EEXIST if the target memory
546 * bank does not exist or is not controllable, or returns 0 upon
547 * success.
548 */
549int pwrdm_set_mem_retst(struct powerdomain *pwrdm, u8 bank, u8 pwrst)
550{
634 u32 m;
551 int ret = -EINVAL;
635
636 if (!pwrdm)
637 return -EINVAL;
638
639 if (pwrdm->banks < (bank + 1))
640 return -EEXIST;
641
642 if (!(pwrdm->pwrsts_mem_ret[bank] & (1 << pwrst)))
643 return -EINVAL;
644
645 pr_debug("powerdomain: setting next memory powerstate for domain %s "
646 "bank %0x while pwrdm-RET to %0x\n", pwrdm->name, bank, pwrst);
647
552
553 if (!pwrdm)
554 return -EINVAL;
555
556 if (pwrdm->banks < (bank + 1))
557 return -EEXIST;
558
559 if (!(pwrdm->pwrsts_mem_ret[bank] & (1 << pwrst)))
560 return -EINVAL;
561
562 pr_debug("powerdomain: setting next memory powerstate for domain %s "
563 "bank %0x while pwrdm-RET to %0x\n", pwrdm->name, bank, pwrst);
564
648 /*
649 * The register bit names below may not correspond to the
650 * actual names of the bits in each powerdomain's register,
651 * but the type of value returned is the same for each
652 * powerdomain.
653 */
654 switch (bank) {
655 case 0:
656 m = OMAP_MEM0_RETSTATE_MASK;
657 break;
658 case 1:
659 m = OMAP_MEM1_RETSTATE_MASK;
660 break;
661 case 2:
662 m = OMAP_MEM2_RETSTATE_MASK;
663 break;
664 case 3:
665 m = OMAP_MEM3_RETSTATE_MASK;
666 break;
667 case 4:
668 m = OMAP_MEM4_RETSTATE_MASK;
669 break;
670 default:
671 WARN_ON(1); /* should never happen */
672 return -EEXIST;
673 }
565 if (arch_pwrdm && arch_pwrdm->pwrdm_set_mem_retst)
566 ret = arch_pwrdm->pwrdm_set_mem_retst(pwrdm, bank, pwrst);
674
567
675 prm_rmw_mod_reg_bits(m, (pwrst << __ffs(m)), pwrdm->prcm_offs,
676 pwrstctrl_reg_offs);
677
678 return 0;
568 return ret;
679}
680
681/**
682 * pwrdm_read_logic_pwrst - get current powerdomain logic retention power state
683 * @pwrdm: struct powerdomain * to get current logic retention power state
684 *
685 * Return the power state that the logic portion of powerdomain @pwrdm
686 * will enter when the powerdomain enters retention. Returns -EINVAL

--- 62 unchanged lines hidden (view full) ---

749 *
750 * Return the powerdomain @pwrdm's current memory power state for bank
751 * @bank. Returns -EINVAL if the powerdomain pointer is null, -EEXIST if
752 * the target memory bank does not exist or is not controllable, or
753 * returns the current memory power state upon success.
754 */
755int pwrdm_read_mem_pwrst(struct powerdomain *pwrdm, u8 bank)
756{
569}
570
571/**
572 * pwrdm_read_logic_pwrst - get current powerdomain logic retention power state
573 * @pwrdm: struct powerdomain * to get current logic retention power state
574 *
575 * Return the power state that the logic portion of powerdomain @pwrdm
576 * will enter when the powerdomain enters retention. Returns -EINVAL

--- 62 unchanged lines hidden (view full) ---

639 *
640 * Return the powerdomain @pwrdm's current memory power state for bank
641 * @bank. Returns -EINVAL if the powerdomain pointer is null, -EEXIST if
642 * the target memory bank does not exist or is not controllable, or
643 * returns the current memory power state upon success.
644 */
645int pwrdm_read_mem_pwrst(struct powerdomain *pwrdm, u8 bank)
646{
757 u32 m;
647 int ret = -EINVAL;
758
759 if (!pwrdm)
648
649 if (!pwrdm)
760 return -EINVAL;
650 return ret;
761
762 if (pwrdm->banks < (bank + 1))
651
652 if (pwrdm->banks < (bank + 1))
763 return -EEXIST;
653 return ret;
764
765 if (pwrdm->flags & PWRDM_HAS_MPU_QUIRK)
766 bank = 1;
767
654
655 if (pwrdm->flags & PWRDM_HAS_MPU_QUIRK)
656 bank = 1;
657
768 /*
769 * The register bit names below may not correspond to the
770 * actual names of the bits in each powerdomain's register,
771 * but the type of value returned is the same for each
772 * powerdomain.
773 */
774 switch (bank) {
775 case 0:
776 m = OMAP_MEM0_STATEST_MASK;
777 break;
778 case 1:
779 m = OMAP_MEM1_STATEST_MASK;
780 break;
781 case 2:
782 m = OMAP_MEM2_STATEST_MASK;
783 break;
784 case 3:
785 m = OMAP_MEM3_STATEST_MASK;
786 break;
787 case 4:
788 m = OMAP_MEM4_STATEST_MASK;
789 break;
790 default:
791 WARN_ON(1); /* should never happen */
792 return -EEXIST;
793 }
658 if (arch_pwrdm && arch_pwrdm->pwrdm_read_mem_pwrst)
659 ret = arch_pwrdm->pwrdm_read_mem_pwrst(pwrdm, bank);
794
660
795 return prm_read_mod_bits_shift(pwrdm->prcm_offs,
796 pwrstst_reg_offs, m);
661 return ret;
797}
798
799/**
800 * pwrdm_read_prev_mem_pwrst - get previous memory bank power state
801 * @pwrdm: struct powerdomain * to get previous memory bank power state
802 * @bank: memory bank number (0-3)
803 *
804 * Return the powerdomain @pwrdm's previous memory power state for
805 * bank @bank. Returns -EINVAL if the powerdomain pointer is null,
806 * -EEXIST if the target memory bank does not exist or is not
807 * controllable, or returns the previous memory power state upon
808 * success.
809 */
810int pwrdm_read_prev_mem_pwrst(struct powerdomain *pwrdm, u8 bank)
811{
662}
663
664/**
665 * pwrdm_read_prev_mem_pwrst - get previous memory bank power state
666 * @pwrdm: struct powerdomain * to get previous memory bank power state
667 * @bank: memory bank number (0-3)
668 *
669 * Return the powerdomain @pwrdm's previous memory power state for
670 * bank @bank. Returns -EINVAL if the powerdomain pointer is null,
671 * -EEXIST if the target memory bank does not exist or is not
672 * controllable, or returns the previous memory power state upon
673 * success.
674 */
675int pwrdm_read_prev_mem_pwrst(struct powerdomain *pwrdm, u8 bank)
676{
812 u32 m;
677 int ret = -EINVAL;
813
814 if (!pwrdm)
678
679 if (!pwrdm)
815 return -EINVAL;
680 return ret;
816
817 if (pwrdm->banks < (bank + 1))
681
682 if (pwrdm->banks < (bank + 1))
818 return -EEXIST;
683 return ret;
819
820 if (pwrdm->flags & PWRDM_HAS_MPU_QUIRK)
821 bank = 1;
822
684
685 if (pwrdm->flags & PWRDM_HAS_MPU_QUIRK)
686 bank = 1;
687
823 /*
824 * The register bit names below may not correspond to the
825 * actual names of the bits in each powerdomain's register,
826 * but the type of value returned is the same for each
827 * powerdomain.
828 */
829 switch (bank) {
830 case 0:
831 m = OMAP3430_LASTMEM1STATEENTERED_MASK;
832 break;
833 case 1:
834 m = OMAP3430_LASTMEM2STATEENTERED_MASK;
835 break;
836 case 2:
837 m = OMAP3430_LASTSHAREDL2CACHEFLATSTATEENTERED_MASK;
838 break;
839 case 3:
840 m = OMAP3430_LASTL2FLATMEMSTATEENTERED_MASK;
841 break;
842 default:
843 WARN_ON(1); /* should never happen */
844 return -EEXIST;
845 }
688 if (arch_pwrdm && arch_pwrdm->pwrdm_read_prev_mem_pwrst)
689 ret = arch_pwrdm->pwrdm_read_prev_mem_pwrst(pwrdm, bank);
846
690
847 return prm_read_mod_bits_shift(pwrdm->prcm_offs,
848 OMAP3430_PM_PREPWSTST, m);
691 return ret;
849}
850
851/**
852 * pwrdm_read_mem_retst - get next memory bank power state
853 * @pwrdm: struct powerdomain * to get mext memory bank power state
854 * @bank: memory bank number (0-3)
855 *
856 * Return the powerdomain pwrdm's next memory power state for bank
857 * x. Returns -EINVAL if the powerdomain pointer is null, -EEXIST if
858 * the target memory bank does not exist or is not controllable, or
859 * returns the next memory power state upon success.
860 */
861int pwrdm_read_mem_retst(struct powerdomain *pwrdm, u8 bank)
862{
692}
693
694/**
695 * pwrdm_read_mem_retst - get next memory bank power state
696 * @pwrdm: struct powerdomain * to get mext memory bank power state
697 * @bank: memory bank number (0-3)
698 *
699 * Return the powerdomain pwrdm's next memory power state for bank
700 * x. Returns -EINVAL if the powerdomain pointer is null, -EEXIST if
701 * the target memory bank does not exist or is not controllable, or
702 * returns the next memory power state upon success.
703 */
704int pwrdm_read_mem_retst(struct powerdomain *pwrdm, u8 bank)
705{
863 u32 m;
706 int ret = -EINVAL;
864
865 if (!pwrdm)
707
708 if (!pwrdm)
866 return -EINVAL;
709 return ret;
867
868 if (pwrdm->banks < (bank + 1))
710
711 if (pwrdm->banks < (bank + 1))
869 return -EEXIST;
712 return ret;
870
713
871 /*
872 * The register bit names below may not correspond to the
873 * actual names of the bits in each powerdomain's register,
874 * but the type of value returned is the same for each
875 * powerdomain.
876 */
877 switch (bank) {
878 case 0:
879 m = OMAP_MEM0_RETSTATE_MASK;
880 break;
881 case 1:
882 m = OMAP_MEM1_RETSTATE_MASK;
883 break;
884 case 2:
885 m = OMAP_MEM2_RETSTATE_MASK;
886 break;
887 case 3:
888 m = OMAP_MEM3_RETSTATE_MASK;
889 break;
890 case 4:
891 m = OMAP_MEM4_RETSTATE_MASK;
892 break;
893 default:
894 WARN_ON(1); /* should never happen */
895 return -EEXIST;
896 }
714 if (arch_pwrdm && arch_pwrdm->pwrdm_read_mem_retst)
715 ret = arch_pwrdm->pwrdm_read_mem_retst(pwrdm, bank);
897
716
898 return prm_read_mod_bits_shift(pwrdm->prcm_offs,
899 pwrstctrl_reg_offs, m);
717 return ret;
900}
901
902/**
903 * pwrdm_clear_all_prev_pwrst - clear previous powerstate register for a pwrdm
904 * @pwrdm: struct powerdomain * to clear
905 *
906 * Clear the powerdomain's previous power state register @pwrdm.
907 * Clears the entire register, including logic and memory bank
908 * previous power states. Returns -EINVAL if the powerdomain pointer
909 * is null, or returns 0 upon success.
910 */
911int pwrdm_clear_all_prev_pwrst(struct powerdomain *pwrdm)
912{
718}
719
720/**
721 * pwrdm_clear_all_prev_pwrst - clear previous powerstate register for a pwrdm
722 * @pwrdm: struct powerdomain * to clear
723 *
724 * Clear the powerdomain's previous power state register @pwrdm.
725 * Clears the entire register, including logic and memory bank
726 * previous power states. Returns -EINVAL if the powerdomain pointer
727 * is null, or returns 0 upon success.
728 */
729int pwrdm_clear_all_prev_pwrst(struct powerdomain *pwrdm)
730{
731 int ret = -EINVAL;
732
913 if (!pwrdm)
733 if (!pwrdm)
914 return -EINVAL;
734 return ret;
915
916 /*
917 * XXX should get the powerdomain's current state here;
918 * warn & fail if it is not ON.
919 */
920
921 pr_debug("powerdomain: clearing previous power state reg for %s\n",
922 pwrdm->name);
923
735
736 /*
737 * XXX should get the powerdomain's current state here;
738 * warn & fail if it is not ON.
739 */
740
741 pr_debug("powerdomain: clearing previous power state reg for %s\n",
742 pwrdm->name);
743
924 prm_write_mod_reg(0, pwrdm->prcm_offs, OMAP3430_PM_PREPWSTST);
744 if (arch_pwrdm && arch_pwrdm->pwrdm_clear_all_prev_pwrst)
745 ret = arch_pwrdm->pwrdm_clear_all_prev_pwrst(pwrdm);
925
746
926 return 0;
747 return ret;
927}
928
929/**
930 * pwrdm_enable_hdwr_sar - enable automatic hardware SAR for a pwrdm
931 * @pwrdm: struct powerdomain *
932 *
933 * Enable automatic context save-and-restore upon power state change
934 * for some devices in the powerdomain @pwrdm. Warning: this only
935 * affects a subset of devices in a powerdomain; check the TRM
936 * closely. Returns -EINVAL if the powerdomain pointer is null or if
937 * the powerdomain does not support automatic save-and-restore, or
938 * returns 0 upon success.
939 */
940int pwrdm_enable_hdwr_sar(struct powerdomain *pwrdm)
941{
748}
749
750/**
751 * pwrdm_enable_hdwr_sar - enable automatic hardware SAR for a pwrdm
752 * @pwrdm: struct powerdomain *
753 *
754 * Enable automatic context save-and-restore upon power state change
755 * for some devices in the powerdomain @pwrdm. Warning: this only
756 * affects a subset of devices in a powerdomain; check the TRM
757 * closely. Returns -EINVAL if the powerdomain pointer is null or if
758 * the powerdomain does not support automatic save-and-restore, or
759 * returns 0 upon success.
760 */
761int pwrdm_enable_hdwr_sar(struct powerdomain *pwrdm)
762{
763 int ret = -EINVAL;
764
942 if (!pwrdm)
765 if (!pwrdm)
943 return -EINVAL;
766 return ret;
944
945 if (!(pwrdm->flags & PWRDM_HAS_HDWR_SAR))
767
768 if (!(pwrdm->flags & PWRDM_HAS_HDWR_SAR))
946 return -EINVAL;
769 return ret;
947
948 pr_debug("powerdomain: %s: setting SAVEANDRESTORE bit\n",
949 pwrdm->name);
950
770
771 pr_debug("powerdomain: %s: setting SAVEANDRESTORE bit\n",
772 pwrdm->name);
773
951 prm_rmw_mod_reg_bits(0, 1 << OMAP3430ES2_SAVEANDRESTORE_SHIFT,
952 pwrdm->prcm_offs, pwrstctrl_reg_offs);
774 if (arch_pwrdm && arch_pwrdm->pwrdm_enable_hdwr_sar)
775 ret = arch_pwrdm->pwrdm_enable_hdwr_sar(pwrdm);
953
776
954 return 0;
777 return ret;
955}
956
957/**
958 * pwrdm_disable_hdwr_sar - disable automatic hardware SAR for a pwrdm
959 * @pwrdm: struct powerdomain *
960 *
961 * Disable automatic context save-and-restore upon power state change
962 * for some devices in the powerdomain @pwrdm. Warning: this only
963 * affects a subset of devices in a powerdomain; check the TRM
964 * closely. Returns -EINVAL if the powerdomain pointer is null or if
965 * the powerdomain does not support automatic save-and-restore, or
966 * returns 0 upon success.
967 */
968int pwrdm_disable_hdwr_sar(struct powerdomain *pwrdm)
969{
778}
779
780/**
781 * pwrdm_disable_hdwr_sar - disable automatic hardware SAR for a pwrdm
782 * @pwrdm: struct powerdomain *
783 *
784 * Disable automatic context save-and-restore upon power state change
785 * for some devices in the powerdomain @pwrdm. Warning: this only
786 * affects a subset of devices in a powerdomain; check the TRM
787 * closely. Returns -EINVAL if the powerdomain pointer is null or if
788 * the powerdomain does not support automatic save-and-restore, or
789 * returns 0 upon success.
790 */
791int pwrdm_disable_hdwr_sar(struct powerdomain *pwrdm)
792{
793 int ret = -EINVAL;
794
970 if (!pwrdm)
795 if (!pwrdm)
971 return -EINVAL;
796 return ret;
972
973 if (!(pwrdm->flags & PWRDM_HAS_HDWR_SAR))
797
798 if (!(pwrdm->flags & PWRDM_HAS_HDWR_SAR))
974 return -EINVAL;
799 return ret;
975
976 pr_debug("powerdomain: %s: clearing SAVEANDRESTORE bit\n",
977 pwrdm->name);
978
800
801 pr_debug("powerdomain: %s: clearing SAVEANDRESTORE bit\n",
802 pwrdm->name);
803
979 prm_rmw_mod_reg_bits(1 << OMAP3430ES2_SAVEANDRESTORE_SHIFT, 0,
980 pwrdm->prcm_offs, pwrstctrl_reg_offs);
804 if (arch_pwrdm && arch_pwrdm->pwrdm_disable_hdwr_sar)
805 ret = arch_pwrdm->pwrdm_disable_hdwr_sar(pwrdm);
981
806
982 return 0;
807 return ret;
983}
984
985/**
986 * pwrdm_has_hdwr_sar - test whether powerdomain supports hardware SAR
987 * @pwrdm: struct powerdomain *
988 *
989 * Returns 1 if powerdomain @pwrdm supports hardware save-and-restore
990 * for some devices, or 0 if it does not.

--- 10 unchanged lines hidden (view full) ---

1001 * Allows a powerdomain to transtion to a lower power sleep state
1002 * from an existing sleep state without waking up the powerdomain.
1003 * Returns -EINVAL if the powerdomain pointer is null or if the
1004 * powerdomain does not support LOWPOWERSTATECHANGE, or returns 0
1005 * upon success.
1006 */
1007int pwrdm_set_lowpwrstchange(struct powerdomain *pwrdm)
1008{
808}
809
810/**
811 * pwrdm_has_hdwr_sar - test whether powerdomain supports hardware SAR
812 * @pwrdm: struct powerdomain *
813 *
814 * Returns 1 if powerdomain @pwrdm supports hardware save-and-restore
815 * for some devices, or 0 if it does not.

--- 10 unchanged lines hidden (view full) ---

826 * Allows a powerdomain to transtion to a lower power sleep state
827 * from an existing sleep state without waking up the powerdomain.
828 * Returns -EINVAL if the powerdomain pointer is null or if the
829 * powerdomain does not support LOWPOWERSTATECHANGE, or returns 0
830 * upon success.
831 */
832int pwrdm_set_lowpwrstchange(struct powerdomain *pwrdm)
833{
834 int ret = -EINVAL;
835
1009 if (!pwrdm)
1010 return -EINVAL;
1011
1012 if (!(pwrdm->flags & PWRDM_HAS_LOWPOWERSTATECHANGE))
1013 return -EINVAL;
1014
1015 pr_debug("powerdomain: %s: setting LOWPOWERSTATECHANGE bit\n",
1016 pwrdm->name);
1017
836 if (!pwrdm)
837 return -EINVAL;
838
839 if (!(pwrdm->flags & PWRDM_HAS_LOWPOWERSTATECHANGE))
840 return -EINVAL;
841
842 pr_debug("powerdomain: %s: setting LOWPOWERSTATECHANGE bit\n",
843 pwrdm->name);
844
1018 prm_rmw_mod_reg_bits(OMAP4430_LOWPOWERSTATECHANGE_MASK,
1019 (1 << OMAP4430_LOWPOWERSTATECHANGE_SHIFT),
1020 pwrdm->prcm_offs, pwrstctrl_reg_offs);
845 if (arch_pwrdm && arch_pwrdm->pwrdm_set_lowpwrstchange)
846 ret = arch_pwrdm->pwrdm_set_lowpwrstchange(pwrdm);
1021
847
1022 return 0;
848 return ret;
1023}
1024
1025/**
1026 * pwrdm_wait_transition - wait for powerdomain power transition to finish
1027 * @pwrdm: struct powerdomain * to wait for
1028 *
1029 * If the powerdomain @pwrdm is in the process of a state transition,
1030 * spin until it completes the power transition, or until an iteration
1031 * bailout value is reached. Returns -EINVAL if the powerdomain
1032 * pointer is null, -EAGAIN if the bailout value was reached, or
1033 * returns 0 upon success.
1034 */
1035int pwrdm_wait_transition(struct powerdomain *pwrdm)
1036{
849}
850
851/**
852 * pwrdm_wait_transition - wait for powerdomain power transition to finish
853 * @pwrdm: struct powerdomain * to wait for
854 *
855 * If the powerdomain @pwrdm is in the process of a state transition,
856 * spin until it completes the power transition, or until an iteration
857 * bailout value is reached. Returns -EINVAL if the powerdomain
858 * pointer is null, -EAGAIN if the bailout value was reached, or
859 * returns 0 upon success.
860 */
861int pwrdm_wait_transition(struct powerdomain *pwrdm)
862{
1037 u32 c = 0;
863 int ret = -EINVAL;
1038
1039 if (!pwrdm)
1040 return -EINVAL;
1041
864
865 if (!pwrdm)
866 return -EINVAL;
867
1042 /*
1043 * REVISIT: pwrdm_wait_transition() may be better implemented
1044 * via a callback and a periodic timer check -- how long do we expect
1045 * powerdomain transitions to take?
1046 */
868 if (arch_pwrdm && arch_pwrdm->pwrdm_wait_transition)
869 ret = arch_pwrdm->pwrdm_wait_transition(pwrdm);
1047
870
1048 /* XXX Is this udelay() value meaningful? */
1049 while ((prm_read_mod_reg(pwrdm->prcm_offs, pwrstst_reg_offs) &
1050 OMAP_INTRANSITION_MASK) &&
1051 (c++ < PWRDM_TRANSITION_BAILOUT))
1052 udelay(1);
1053
1054 if (c > PWRDM_TRANSITION_BAILOUT) {
1055 printk(KERN_ERR "powerdomain: waited too long for "
1056 "powerdomain %s to complete transition\n", pwrdm->name);
1057 return -EAGAIN;
1058 }
1059
1060 pr_debug("powerdomain: completed transition in %d loops\n", c);
1061
1062 return 0;
871 return ret;
1063}
1064
1065int pwrdm_state_switch(struct powerdomain *pwrdm)
1066{
1067 return _pwrdm_state_switch(pwrdm, PWRDM_STATE_NOW);
1068}
1069
1070int pwrdm_clkdm_state_switch(struct clockdomain *clkdm)

--- 20 unchanged lines hidden --- 		872}
873
874int pwrdm_state_switch(struct powerdomain *pwrdm)
875{
876 return _pwrdm_state_switch(pwrdm, PWRDM_STATE_NOW);
877}
878
879int pwrdm_clkdm_state_switch(struct clockdomain *clkdm)

--- 20 unchanged lines hidden ---