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authorSteven Miao <realmz6@gmail.com>2012-03-31 16:01:50 +0800
committersonic <sonic@sonic-linuxvm.(none)>2013-03-04 13:42:08 +0800
commit9faf4f08e752ca95d0986a200d48b67b59cde5ef (patch)
tree2ffbbcb34c3dd19d7d82708dd44ef8dd2e0d56b2 /arch/blackfin/cpu
parent49c2da53b7aa63f68118fa9ffa5c5e546440ebb2 (diff)
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blackfin: bf60x: add resume from hibernate
Add Bf60x resume from hibernate support Signed-off-by: Steven Miao <realmz6@gmail.com> Signed-off-by: Sonic Zhang <sonic.zhang@analog.com> Signed-off-by: Bob Liu <lliubbo@gmail.com> Signed-off-by: Sonic Zhang <sonic.adi@gmail.com>
Diffstat (limited to 'arch/blackfin/cpu')
-rw-r--r--arch/blackfin/cpu/initcode.c46
1 files changed, 46 insertions, 0 deletions
diff --git a/arch/blackfin/cpu/initcode.c b/arch/blackfin/cpu/initcode.c
index ce9a435..1a06680 100644
--- a/arch/blackfin/cpu/initcode.c
+++ b/arch/blackfin/cpu/initcode.c
@@ -509,6 +509,11 @@ maybe_self_refresh(ADI_BOOT_DATA *bs)
return false;
#ifdef __ADSPBF60x__
+ /* resume from hibernate, return false let ddr initialize */
+ if ((bfin_read32(DPM0_STAT) & 0xF0) == 0x50) {
+ serial_putc('b');
+ return false;
+ }
#else /* __ADSPBF60x__ */
@@ -827,6 +832,7 @@ program_memory_controller(ADI_BOOT_DATA *bs, bool put_into_srfs)
while (!(bfin_read_DMC0_STAT() & DLLCALDONE))
continue;
serial_putc('!');
+
#else /* __ADSPBF60x__ */
/* Program the external memory controller before we come out of
@@ -894,7 +900,46 @@ check_hibernation(ADI_BOOT_DATA *bs, u16 vr_ctl, bool put_into_srfs)
return;
serial_putc('b');
+#ifdef __ADSPBF60x__
+ if (bfin_read32(DPM0_RESTORE0) != 0) {
+ uint32_t reg = bfin_read_DMC0_CTL();
+ reg &= ~0x8;
+ bfin_write_DMC0_CTL(reg);
+
+ while ((bfin_read_DMC0_STAT() & 0x8))
+ continue;
+ while (!(bfin_read_DMC0_STAT() & 0x1))
+ continue;
+ serial_putc('z');
+ uint32_t *hibernate_magic = bfin_read32(DPM0_RESTORE4);
+ SSYNC(); /* make sure memory controller is done */
+ if (hibernate_magic[0] == 0xDEADBEEF) {
+ serial_putc('c');
+ SSYNC();
+ bfin_write_EVT15(hibernate_magic[1]);
+ bfin_write_IMASK(EVT_IVG15);
+ __asm__ __volatile__ (
+ /* load reti early to avoid anomaly 281 */
+ "reti = %2;"
+ /* clear hibernate magic */
+ "[%0] = %1;"
+ /* load stack pointer */
+ "SP = [%0 + 8];"
+ /* lower ourselves from reset ivg to ivg15 */
+ "raise 15;"
+ "nop;nop;nop;"
+ "rti;"
+ :
+ : "p"(hibernate_magic),
+ "d"(0x2000 /* jump.s 0 */),
+ "d"(0xffa00000)
+ );
+ }
+
+
+ }
+#else
/* Are we coming out of hibernate (suspend to memory) ?
* The memory layout is:
* 0x0: hibernate magic for anomaly 307 (0xDEADBEEF)
@@ -927,6 +972,7 @@ check_hibernation(ADI_BOOT_DATA *bs, u16 vr_ctl, bool put_into_srfs)
}
serial_putc('d');
}
+#endif
serial_putc('e');
}