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>
diff --git a/arch/mips/alchemy/common/sleeper.S b/arch/mips/alchemy/common/sleeper.S
index 77f3c74..c7bcc7e 100644
--- a/arch/mips/alchemy/common/sleeper.S
+++ b/arch/mips/alchemy/common/sleeper.S
@@ -153,6 +153,79 @@
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.