diff options
Diffstat (limited to 'arch/sh/boards/mach-se/7724/sdram.S')
| -rw-r--r-- | arch/sh/boards/mach-se/7724/sdram.S | 79 |
1 files changed, 79 insertions, 0 deletions
diff --git a/arch/sh/boards/mach-se/7724/sdram.S b/arch/sh/boards/mach-se/7724/sdram.S index 9040167d5022..6fa4734d09c7 100644 --- a/arch/sh/boards/mach-se/7724/sdram.S +++ b/arch/sh/boards/mach-se/7724/sdram.S @@ -39,6 +39,10 @@ ENTRY(ms7724se_sdram_leave_start) /* DBSC: put memory in auto-refresh mode */ + mov.l @(SH_SLEEP_MODE, r5), r0 + tst #SUSP_SH_RSTANDBY, r0 + bf resume_rstandby + ED 0xFD000040, 0x00000000 /* DBRFPDN0 */ WAIT 1 ED 0xFD000014, 0x00000002 /* DBCMDCNT (PALL) */ @@ -49,4 +53,79 @@ ENTRY(ms7724se_sdram_leave_start) rts nop +resume_rstandby: + + /* CPG: setup clocks before restarting external memory */ + + ED 0xA4150024, 0x00004000 /* PLLCR */ + + mov.l FRQCRA,r0 + mov.l @r0,r3 + mov.l KICK,r1 + or r1, r3 + mov.l r3, @r0 + + mov.l LSTATS,r0 + mov #1,r1 +WAIT_LSTATS: + mov.l @r0,r3 + tst r1,r3 + bf WAIT_LSTATS + + /* 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 +FRQCRA: .long 0xa4150000 +KICK: .long 0x80000000 +LSTATS: .long 0xa4150060 + ENTRY(ms7724se_sdram_leave_end) |