diff options
| author | Magnus Damm <damm@opensource.se> | 2010-02-25 12:07:52 +0100 |
|---|---|---|
| committer | Paul Mundt <lethal@linux-sh.org> | 2010-02-26 07:29:28 +0100 |
| commit | 2839bd61f671d3debf9ef0893a0470fd97b2e2ce (patch) | |
| tree | 84b261fadf0ab9d12212cdb9a4c9a7f39b63c01d /arch/sh/boards/mach-ecovec24/sdram.S | |
| parent | sh: ms7724se r-standby support (diff) | |
| download | linux-2839bd61f671d3debf9ef0893a0470fd97b2e2ce.tar.xz linux-2839bd61f671d3debf9ef0893a0470fd97b2e2ce.zip | |
sh: ecovec r-standby support
This patch adds board specific r-standby resume code
for ecovec.
Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Diffstat (limited to 'arch/sh/boards/mach-ecovec24/sdram.S')
| -rw-r--r-- | arch/sh/boards/mach-ecovec24/sdram.S | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/arch/sh/boards/mach-ecovec24/sdram.S b/arch/sh/boards/mach-ecovec24/sdram.S index 833440044407..3963c6f23d52 100644 --- a/arch/sh/boards/mach-ecovec24/sdram.S +++ b/arch/sh/boards/mach-ecovec24/sdram.S @@ -37,6 +37,10 @@ ENTRY(ecovec24_sdram_enter_end) .balign 4 ENTRY(ecovec24_sdram_leave_start) + mov.l @(SH_SLEEP_MODE, r5), r0 + tst #SUSP_SH_RSTANDBY, r0 + bf resume_rstandby + /* DBSC: put memory in auto-refresh mode */ ED 0xFD000040, 0x00000000 /* DBRFPDN0 */ @@ -49,4 +53,59 @@ ENTRY(ecovec24_sdram_leave_start) rts nop +resume_rstandby: + + /* DBSC: re-initialize and put in auto-refresh */ + + ED 0xFD000108, 0x00000181 /* DBPDCNT0 */ + ED 0xFD000020, 0x015B0002 /* DBCONF */ + ED 0xFD000030, 0x03071502 /* DBTR0 */ + ED 0xFD000034, 0x02020102 /* DBTR1 */ + ED 0xFD000038, 0x01090405 /* DBTR2 */ + ED 0xFD00003C, 0x00000002 /* DBTR3 */ + ED 0xFD000008, 0x00000005 /* DBKIND */ + ED 0xFD000040, 0x00000001 /* DBRFPDN0 */ + ED 0xFD000040, 0x00000000 /* DBRFPDN0 */ + ED 0xFD000018, 0x00000001 /* DBCKECNT */ + + mov #100,r0 +WAIT_400NS: + dt r0 + bf WAIT_400NS + + ED 0xFD000014, 0x00000002 /* DBCMDCNT (PALL) */ + ED 0xFD000060, 0x00020000 /* DBMRCNT (EMR2) */ + ED 0xFD000060, 0x00030000 /* DBMRCNT (EMR3) */ + ED 0xFD000060, 0x00010004 /* DBMRCNT (EMR) */ + ED 0xFD000060, 0x00000532 /* DBMRCNT (MRS) */ + ED 0xFD000014, 0x00000002 /* DBCMDCNT (PALL) */ + ED 0xFD000014, 0x00000004 /* DBCMDCNT (REF) */ + ED 0xFD000014, 0x00000004 /* DBCMDCNT (REF) */ + ED 0xFD000060, 0x00000432 /* DBMRCNT (MRS) */ + ED 0xFD000060, 0x000103c0 /* DBMRCNT (EMR) */ + ED 0xFD000060, 0x00010040 /* DBMRCNT (EMR) */ + + mov #100,r0 +WAIT_400NS_2: + dt r0 + bf WAIT_400NS_2 + + ED 0xFD000010, 0x00000001 /* DBEN */ + ED 0xFD000044, 0x0000050f /* DBRFPDN1 */ + ED 0xFD000048, 0x236800e6 /* DBRFPDN2 */ + + mov.l DUMMY,r0 + mov.l @r0, r1 /* force single dummy read */ + + ED 0xFD000014, 0x00000002 /* DBCMDCNT (PALL) */ + ED 0xFD000014, 0x00000004 /* DBCMDCNT (REF) */ + ED 0xFD000108, 0x00000080 /* DBPDCNT0 */ + ED 0xFD000040, 0x00010000 /* DBRFPDN0 */ + + rts + nop + + .balign 4 +DUMMY: .long 0xac400000 + ENTRY(ecovec24_sdram_leave_end) |