diff options
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/blackfin/include/asm/context.S | 9 | ||||
| -rw-r--r-- | arch/blackfin/mach-bf609/Makefile | 2 | ||||
| -rw-r--r-- | arch/blackfin/mach-bf609/dpm.S | 155 | ||||
| -rw-r--r-- | arch/blackfin/mach-bf609/hibernate.S | 65 | ||||
| -rw-r--r-- | arch/blackfin/mach-bf609/include/mach/pm.h | 6 | ||||
| -rw-r--r-- | arch/blackfin/mach-bf609/pm.c | 80 | ||||
| -rw-r--r-- | arch/blackfin/mach-common/entry.S | 7 |
7 files changed, 197 insertions, 127 deletions
diff --git a/arch/blackfin/include/asm/context.S b/arch/blackfin/include/asm/context.S index 1f9060395a0a..507e7aa6a561 100644 --- a/arch/blackfin/include/asm/context.S +++ b/arch/blackfin/include/asm/context.S @@ -396,3 +396,12 @@ call \func; #endif .endm + +#if defined(CONFIG_BFIN_SCRATCH_REG_RETN) +# define EX_SCRATCH_REG RETN +#elif defined(CONFIG_BFIN_SCRATCH_REG_RETE) +# define EX_SCRATCH_REG RETE +#else +# define EX_SCRATCH_REG CYCLES +#endif + diff --git a/arch/blackfin/mach-bf609/Makefile b/arch/blackfin/mach-bf609/Makefile index 2a27f8174543..9a3d9f252c11 100644 --- a/arch/blackfin/mach-bf609/Makefile +++ b/arch/blackfin/mach-bf609/Makefile @@ -3,4 +3,4 @@ # obj-y := dma.o clock.o -obj-$(CONFIG_PM) += pm.o hibernate.o +obj-$(CONFIG_PM) += pm.o dpm.o diff --git a/arch/blackfin/mach-bf609/dpm.S b/arch/blackfin/mach-bf609/dpm.S new file mode 100644 index 000000000000..62cc31994298 --- /dev/null +++ b/arch/blackfin/mach-bf609/dpm.S @@ -0,0 +1,155 @@ +#include <linux/linkage.h> +#include <asm/blackfin.h> +#include <asm/dpmc.h> + +#include <asm/context.S> + +#define PM_STACK (COREA_L1_SCRATCH_START + L1_SCRATCH_LENGTH - 12) + +.section .l1.text +ENTRY(_enter_hibernate) + /* switch stack to L1 scratch, prepare for ddr srfr */ + P0.H = HI(PM_STACK); + P0.L = LO(PM_STACK); + SP = P0; + + call _bf609_ddr_sr; + call _bfin_hibernate_syscontrol; + + P0.H = HI(DPM0_RESTORE4); + P0.L = LO(DPM0_RESTORE4); + P1.H = _bf609_pm_data; + P1.L = _bf609_pm_data; + [P0] = P1; + + P0.H = HI(DPM0_CTL); + P0.L = LO(DPM0_CTL); + R3.H = HI(0x00000010); + R3.L = LO(0x00000010); + + bfin_init_pm_bench_cycles; + + [P0] = R3; + + SSYNC; +ENDPROC(_enter_hibernate) + +/* DPM wake up interrupt won't wake up core on bf60x if its core IMASK + * is disabled. This behavior differ from bf5xx serial processor. + */ +ENTRY(_dummy_deepsleep) + [--sp] = SYSCFG; + [--sp] = (R7:0,P5:0); + cli r0; + + /* get wake up interrupt ID */ + P0.l = LO(SEC_SCI_BASE + SEC_CSID); + P0.h = HI(SEC_SCI_BASE + SEC_CSID); + R0 = [P0]; + + /* ACK wake up interrupt in SEC */ + P1.l = LO(SEC_END); + P1.h = HI(SEC_END); + + [P1] = R0; + SSYNC; + + /* restore EVT 11 entry */ + p0.h = hi(EVT11); + p0.l = lo(EVT11); + p1.h = _evt_evt11; + p1.l = _evt_evt11; + + [p0] = p1; + SSYNC; + + (R7:0,P5:0) = [sp++]; + SYSCFG = [sp++]; + RTI; +ENDPROC(_dummy_deepsleep) + +ENTRY(_enter_deepsleep) + LINK 0x0; + [--sp] = (R7:0,P5:0); + + /* Change EVT 11 entry to dummy handler for wake up event */ + p0.h = hi(EVT11); + p0.l = lo(EVT11); + p1.h = _dummy_deepsleep; + p1.l = _dummy_deepsleep; + + [p0] = p1; + + P0.H = HI(PM_STACK); + P0.L = LO(PM_STACK); + + EX_SCRATCH_REG = SP; + SP = P0; + + SSYNC; + + /* should put ddr to self refresh mode before sleep */ + call _bf609_ddr_sr; + + /* Set DPM controller to deep sleep mode */ + P0.H = HI(DPM0_CTL); + P0.L = LO(DPM0_CTL); + R3.H = HI(0x00000008); + R3.L = LO(0x00000008); + [P0] = R3; + CSYNC; + + /* Enable evt 11 in IMASK before idle, otherwise core doesn't wake up. */ + r0.l = 0x800; + r0.h = 0; + sti r0; + SSYNC; + + /* Fall into deep sleep in idle*/ + idle; + SSYNC; + + /* Restore PLL after wake up from deep sleep */ + call _bf609_resume_ccbuf; + + /* turn ddr out of self refresh mode */ + call _bf609_ddr_sr_exit; + + SP = EX_SCRATCH_REG; + + (R7:0,P5:0) = [SP++]; + UNLINK; + RTS; +ENDPROC(_enter_deepsleep) + +.section .text +ENTRY(_bf609_hibernate) + bfin_cpu_reg_save; + bfin_core_mmr_save; + + P0.H = _bf609_pm_data; + P0.L = _bf609_pm_data; + R1.H = 0xDEAD; + R1.L = 0xBEEF; + R2.H = .Lpm_resume_here; + R2.L = .Lpm_resume_here; + [P0++] = R1; + [P0++] = R2; + [P0++] = SP; + + P1.H = _enter_hibernate; + P1.L = _enter_hibernate; + + call (P1); +.Lpm_resume_here: + + bfin_core_mmr_restore; + bfin_cpu_reg_restore; + + [--sp] = RETI; /* Clear Global Interrupt Disable */ + SP += 4; + + RTS; + +ENDPROC(_bf609_hibernate) + diff --git a/arch/blackfin/mach-bf609/hibernate.S b/arch/blackfin/mach-bf609/hibernate.S deleted file mode 100644 index d37a532519c8..000000000000 --- a/arch/blackfin/mach-bf609/hibernate.S +++ /dev/null @@ -1,65 +0,0 @@ -#include <linux/linkage.h> -#include <asm/blackfin.h> -#include <asm/dpmc.h> - -#define PM_STACK (COREA_L1_SCRATCH_START + L1_SCRATCH_LENGTH - 12) - -.section .l1.text -ENTRY(_enter_hibernate) - /* switch stack to L1 scratch, prepare for ddr srfr */ - P0.H = HI(PM_STACK); - P0.L = LO(PM_STACK); - SP = P0; - - call _bf609_ddr_sr; - call _bfin_hibernate_syscontrol; - - P0.H = HI(DPM0_RESTORE4); - P0.L = LO(DPM0_RESTORE4); - P1.H = _bf609_pm_data; - P1.L = _bf609_pm_data; - [P0] = P1; - - P0.H = HI(DPM0_CTL); - P0.L = LO(DPM0_CTL); - R3.H = HI(0x00000010); - R3.L = LO(0x00000010); - - bfin_init_pm_bench_cycles; - - [P0] = R3; - - SSYNC; -ENDPROC(_enter_hibernate_mode) - -.section .text -ENTRY(_bf609_hibernate) - bfin_cpu_reg_save; - bfin_core_mmr_save; - - P0.H = _bf609_pm_data; - P0.L = _bf609_pm_data; - R1.H = 0xDEAD; - R1.L = 0xBEEF; - R2.H = .Lpm_resume_here; - R2.L = .Lpm_resume_here; - [P0++] = R1; - [P0++] = R2; - [P0++] = SP; - - P1.H = _enter_hibernate; - P1.L = _enter_hibernate; - - call (P1); -.Lpm_resume_here: - - bfin_core_mmr_restore; - bfin_cpu_reg_restore; - - [--sp] = RETI; /* Clear Global Interrupt Disable */ - SP += 4; - - RTS; - -ENDPROC(_bf609_hibernate) - diff --git a/arch/blackfin/mach-bf609/include/mach/pm.h b/arch/blackfin/mach-bf609/include/mach/pm.h index 036d9bdc889e..68435f9bafca 100644 --- a/arch/blackfin/mach-bf609/include/mach/pm.h +++ b/arch/blackfin/mach-bf609/include/mach/pm.h @@ -11,9 +11,9 @@ #include <linux/suspend.h> -int bfin609_pm_enter(suspend_state_t state); -int bf609_pm_prepare(void); -void bf609_pm_finish(void); +extern int bfin609_pm_enter(suspend_state_t state); +extern int bf609_pm_prepare(void); +extern void bf609_pm_finish(void); void bf609_hibernate(void); void bfin_sec_raise_irq(unsigned int sid); diff --git a/arch/blackfin/mach-bf609/pm.c b/arch/blackfin/mach-bf609/pm.c index b76966eb16ad..6094c7d3b1f2 100644 --- a/arch/blackfin/mach-bf609/pm.c +++ b/arch/blackfin/mach-bf609/pm.c @@ -18,6 +18,7 @@ #include <asm/pm.h> #include <mach/pm.h> #include <asm/blackfin.h> +#include <asm/mem_init.h> /***********************************************************/ /* */ @@ -132,60 +133,30 @@ void bfin_cpu_suspend(void) } __attribute__((l1_text)) -void bfin_deepsleep(unsigned long mask) +void bf609_ddr_sr(void) { - uint32_t dpm0_ctl; - - bfin_write32(DPM0_WAKE_EN, 0x10); - bfin_write32(DPM0_WAKE_POL, 0x10); - dpm0_ctl = 0x00000008; - bfin_write32(DPM0_CTL, dpm0_ctl); - SSYNC(); - __asm__ __volatile__( \ - ".align 8;" \ - "idle;" \ - : : \ - ); -#ifdef CONFIG_BFIN_PM_WAKEUP_TIME_BENCH - __asm__ __volatile__( - "R0 = 0;" - "CYCLES = R0;" - "CYCLES2 = R0;" - "R0 = SYSCFG;" - "BITSET(R0, 1);" - "SYSCFG = R0;" - : : : "R0" - ); -#endif - + dmc_enter_self_refresh(); } __attribute__((l1_text)) -void bf609_ddr_sr(void) +void bf609_ddr_sr_exit(void) { - uint32_t reg; - - reg = bfin_read_DMC0_CTL(); - reg |= 0x8; - bfin_write_DMC0_CTL(reg); + dmc_exit_self_refresh(); - while (!(bfin_read_DMC0_STAT() & 0x8)) + /* After wake up from deep sleep and exit DDR from self refress mode, + * should wait till CGU PLL is locked. + */ + while (bfin_read32(CGU0_STAT) & CLKSALGN) continue; } __attribute__((l1_text)) -void bf609_ddr_sr_exit(void) +void bf609_resume_ccbuf(void) { - uint32_t reg; - while (!(bfin_read_DMC0_STAT() & 0x1)) - continue; + bfin_write32(DPM0_CCBF_EN, 3); + bfin_write32(DPM0_CTL, 2); - reg = bfin_read_DMC0_CTL(); - reg &= ~0x8; - bfin_write_DMC0_CTL(reg); - - while ((bfin_read_DMC0_STAT() & 0x8)) - continue; + while ((bfin_read32(DPM0_STAT) & 0xf) != 1); } __attribute__((l1_text)) @@ -208,6 +179,17 @@ void bfin_hibernate_syscontrol(void) #else # define SIC_SYSIRQ(irq) ((irq) - IVG15) #endif +asmlinkage void enter_deepsleep(void); + +__attribute__((l1_text)) +void bfin_deepsleep(unsigned long mask) +{ + bfin_write32(DPM0_WAKE_EN, 0x10); + bfin_write32(DPM0_WAKE_POL, 0x10); + SSYNC(); + enter_deepsleep(); +} + void bfin_hibernate(unsigned long mask) { bfin_write32(DPM0_WAKE_EN, 0x10); @@ -215,8 +197,6 @@ void bfin_hibernate(unsigned long mask) bfin_write32(DPM0_PGCNTR, 0x0000FFFF); bfin_write32(DPM0_HIB_DIS, 0xFFFF); - printk(KERN_DEBUG "hibernate: restore %x pgcnt %x\n", bfin_read32(DPM0_RESTORE0), bfin_read32(DPM0_PGCNTR)); - bf609_hibernate(); } @@ -294,6 +274,7 @@ void bf609_cpu_pm_enter(suspend_state_t state) else { bfin_hibernate(wakeup); } + } int bf609_cpu_pm_prepare(void) @@ -320,21 +301,18 @@ static irqreturn_t test_isr(int irq, void *dev_id) static irqreturn_t dpm0_isr(int irq, void *dev_id) { - uint32_t wake_stat; - - wake_stat = bfin_read32(DPM0_WAKE_STAT); - printk(KERN_DEBUG "enter %s wake stat %08x\n", __func__, wake_stat); - - bfin_write32(DPM0_WAKE_STAT, wake_stat); + bfin_write32(DPM0_WAKE_STAT, bfin_read32(DPM0_WAKE_STAT)); + bfin_write32(CGU0_STAT, bfin_read32(CGU0_STAT)); return IRQ_HANDLED; } +#endif static int __init bf609_init_pm(void) { int irq; int error; -#if CONFIG_PM_BFIN_WAKE_PE12 +#ifdef CONFIG_PM_BFIN_WAKE_PE12 irq = gpio_to_irq(GPIO_PE12); if (irq < 0) { error = irq; diff --git a/arch/blackfin/mach-common/entry.S b/arch/blackfin/mach-common/entry.S index 04c2fbe41a7f..1c3d2c5bb0bb 100644 --- a/arch/blackfin/mach-common/entry.S +++ b/arch/blackfin/mach-common/entry.S @@ -25,13 +25,6 @@ #include <asm/context.S> -#if defined(CONFIG_BFIN_SCRATCH_REG_RETN) -# define EX_SCRATCH_REG RETN -#elif defined(CONFIG_BFIN_SCRATCH_REG_RETE) -# define EX_SCRATCH_REG RETE -#else -# define EX_SCRATCH_REG CYCLES -#endif #ifdef CONFIG_EXCPT_IRQ_SYSC_L1 .section .l1.text |