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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>
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@ -509,6 +509,11 @@ maybe_self_refresh(ADI_BOOT_DATA *bs)
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return false;
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return false;
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#ifdef __ADSPBF60x__
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#ifdef __ADSPBF60x__
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/* resume from hibernate, return false let ddr initialize */
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if ((bfin_read32(DPM0_STAT) & 0xF0) == 0x50) {
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serial_putc('b');
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return false;
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}
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#else /* __ADSPBF60x__ */
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#else /* __ADSPBF60x__ */
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@ -827,6 +832,7 @@ program_memory_controller(ADI_BOOT_DATA *bs, bool put_into_srfs)
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while (!(bfin_read_DMC0_STAT() & DLLCALDONE))
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while (!(bfin_read_DMC0_STAT() & DLLCALDONE))
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continue;
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continue;
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serial_putc('!');
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serial_putc('!');
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#else /* __ADSPBF60x__ */
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#else /* __ADSPBF60x__ */
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/* Program the external memory controller before we come out of
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/* Program the external memory controller before we come out of
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@ -894,7 +900,46 @@ check_hibernation(ADI_BOOT_DATA *bs, u16 vr_ctl, bool put_into_srfs)
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return;
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return;
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serial_putc('b');
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serial_putc('b');
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#ifdef __ADSPBF60x__
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if (bfin_read32(DPM0_RESTORE0) != 0) {
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uint32_t reg = bfin_read_DMC0_CTL();
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reg &= ~0x8;
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bfin_write_DMC0_CTL(reg);
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while ((bfin_read_DMC0_STAT() & 0x8))
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continue;
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while (!(bfin_read_DMC0_STAT() & 0x1))
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continue;
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serial_putc('z');
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uint32_t *hibernate_magic = bfin_read32(DPM0_RESTORE4);
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SSYNC(); /* make sure memory controller is done */
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if (hibernate_magic[0] == 0xDEADBEEF) {
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serial_putc('c');
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SSYNC();
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bfin_write_EVT15(hibernate_magic[1]);
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bfin_write_IMASK(EVT_IVG15);
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__asm__ __volatile__ (
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/* load reti early to avoid anomaly 281 */
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"reti = %2;"
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/* clear hibernate magic */
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"[%0] = %1;"
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/* load stack pointer */
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"SP = [%0 + 8];"
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/* lower ourselves from reset ivg to ivg15 */
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"raise 15;"
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"nop;nop;nop;"
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"rti;"
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:
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: "p"(hibernate_magic),
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"d"(0x2000 /* jump.s 0 */),
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"d"(0xffa00000)
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);
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}
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}
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#else
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/* Are we coming out of hibernate (suspend to memory) ?
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/* Are we coming out of hibernate (suspend to memory) ?
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* The memory layout is:
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* The memory layout is:
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* 0x0: hibernate magic for anomaly 307 (0xDEADBEEF)
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* 0x0: hibernate magic for anomaly 307 (0xDEADBEEF)
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@ -927,6 +972,7 @@ check_hibernation(ADI_BOOT_DATA *bs, u16 vr_ctl, bool put_into_srfs)
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}
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}
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serial_putc('d');
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serial_putc('d');
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}
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}
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#endif
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serial_putc('e');
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serial_putc('e');
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}
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}
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