diff options
| author | Manuel Lauss <manuel.lauss@googlemail.com> | 2011-11-01 20:03:30 +0100 |
|---|---|---|
| committer | Ralf Baechle <ralf@linux-mips.org> | 2011-12-07 22:02:05 +0000 |
| commit | 809f36c6f4a0568178c909ff1096ca83eae33f7d (patch) | |
| tree | 6b99b1ac701c0bd581811c39e85856f3bcbda22d /arch/mips/alchemy/common/sleeper.S | |
| parent | fb469f084fdf1631e31d87270f5263c20a7f5cd6 (diff) | |
MIPS: Alchemy: Au1300 SoC support
Add basic support for the Au1300 variant(s):
- New GPIO/Interrupt controller
- DBDMA ids
- USB setup
- MMC support
- enable various PSC drivers
- detection code.
Signed-off-by: Manuel Lauss <manuel.lauss@googlemail.com>
To: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/2866/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips/alchemy/common/sleeper.S')
| -rw-r--r-- | arch/mips/alchemy/common/sleeper.S | 73 |
1 files changed, 73 insertions, 0 deletions
diff --git a/arch/mips/alchemy/common/sleeper.S b/arch/mips/alchemy/common/sleeper.S index 77f3c743b716..c7bcc7e5c822 100644 --- a/arch/mips/alchemy/common/sleeper.S +++ b/arch/mips/alchemy/common/sleeper.S @@ -153,6 +153,79 @@ LEAF(alchemy_sleep_au1550) END(alchemy_sleep_au1550) +/* sleepcode for Au1300 memory controller type */ +LEAF(alchemy_sleep_au1300) + + SETUP_SLEEP + + /* cache following instructions, as memory gets put to sleep */ + la t0, 2f + la t1, 4f + subu t2, t1, t0 + + .set mips3 + +1: cache 0x14, 0(t0) + subu t2, t2, 32 + bgez t2, 1b + addu t0, t0, 32 + + .set mips0 + +2: lui a0, 0xb400 /* mem_xxx */ + + /* disable all ports in mem_sdportcfga */ + sw zero, 0x868(a0) /* mem_sdportcfga */ + sync + + /* disable ODT */ + li t0, 0x03010000 + sw t0, 0x08d8(a0) /* mem_sdcmd0 */ + sw t0, 0x08dc(a0) /* mem_sdcmd1 */ + sync + + /* precharge */ + li t0, 0x23000400 + sw t0, 0x08dc(a0) /* mem_sdcmd1 */ + sw t0, 0x08d8(a0) /* mem_sdcmd0 */ + sync + + /* auto refresh */ + sw zero, 0x08c8(a0) /* mem_sdautoref */ + sync + + /* block access to the DDR */ + lw t0, 0x0848(a0) /* mem_sdconfigb */ + li t1, (1 << 7 | 0x3F) + or t0, t0, t1 + sw t0, 0x0848(a0) /* mem_sdconfigb */ + sync + + /* issue the Self Refresh command */ + li t0, 0x10000000 + sw t0, 0x08dc(a0) /* mem_sdcmd1 */ + sw t0, 0x08d8(a0) /* mem_sdcmd0 */ + sync + + /* wait for sdram to enter self-refresh mode */ + lui t0, 0x0300 +3: lw t1, 0x0850(a0) /* mem_sdstat */ + and t2, t1, t0 + bne t2, t0, 3b + nop + + /* disable SDRAM clocks */ + li t0, ~(3<<28) + lw t1, 0x0840(a0) /* mem_sdconfiga */ + and t1, t1, t0 /* clear CE[1:0] */ + sw t1, 0x0840(a0) /* mem_sdconfiga */ + sync + + DO_SLEEP +4: + +END(alchemy_sleep_au1300) + /* This is where we return upon wakeup. * Reload all of the registers and return. |