diff options
Diffstat (limited to 'plat/rockchip/rk3399/drivers/m0/src')
| -rw-r--r-- | plat/rockchip/rk3399/drivers/m0/src/dram.c | 84 | ||||
| -rw-r--r-- | plat/rockchip/rk3399/drivers/m0/src/rk3399m0.ld.S | 26 | ||||
| -rw-r--r-- | plat/rockchip/rk3399/drivers/m0/src/startup.c | 92 | ||||
| -rw-r--r-- | plat/rockchip/rk3399/drivers/m0/src/stopwatch.c | 74 | ||||
| -rw-r--r-- | plat/rockchip/rk3399/drivers/m0/src/suspend.c | 62 |
5 files changed, 338 insertions, 0 deletions
diff --git a/plat/rockchip/rk3399/drivers/m0/src/dram.c b/plat/rockchip/rk3399/drivers/m0/src/dram.c new file mode 100644 index 0000000..84e8884 --- /dev/null +++ b/plat/rockchip/rk3399/drivers/m0/src/dram.c @@ -0,0 +1,84 @@ +/* + * Copyright (c) 2016, ARM Limited and Contributors. All rights reserved. + * + * SPDX-License-Identifier: BSD-3-Clause + */ + +#include <dram_regs.h> +#include <m0_param.h> +#include <pmu_bits.h> +#include <pmu_regs.h> +#include "misc_regs.h" +#include "rk3399_mcu.h" + +static uint32_t gatedis_con0; + +static void idle_port(void) +{ + gatedis_con0 = mmio_read_32(PMUCRU_BASE + PMU_CRU_GATEDIS_CON0); + mmio_write_32(PMUCRU_BASE + PMU_CRU_GATEDIS_CON0, 0x3fffffff); + + mmio_setbits_32(PMU_BASE + PMU_BUS_IDLE_REQ, + (1 << PMU_IDLE_REQ_MSCH0) | (1 << PMU_IDLE_REQ_MSCH1)); + while ((mmio_read_32(PMU_BASE + PMU_BUS_IDLE_ST) & + ((1 << PMU_IDLE_ST_MSCH1) | (1 << PMU_IDLE_ST_MSCH0))) != + ((1 << PMU_IDLE_ST_MSCH1) | (1 << PMU_IDLE_ST_MSCH0))) + continue; +} + +static void deidle_port(void) +{ + mmio_clrbits_32(PMU_BASE + PMU_BUS_IDLE_REQ, + (1 << PMU_IDLE_REQ_MSCH0) | (1 << PMU_IDLE_REQ_MSCH1)); + while (mmio_read_32(PMU_BASE + PMU_BUS_IDLE_ST) & + ((1 << PMU_IDLE_ST_MSCH1) | (1 << PMU_IDLE_ST_MSCH0))) + continue; + + /* document is wrong, PMU_CRU_GATEDIS_CON0 do not need set MASK BIT */ + mmio_write_32(PMUCRU_BASE + PMU_CRU_GATEDIS_CON0, gatedis_con0); +} + +static void ddr_set_pll(void) +{ + mmio_write_32(CRU_BASE + CRU_DPLL_CON3, PLL_MODE(PLL_SLOW_MODE)); + + mmio_write_32(CRU_BASE + CRU_DPLL_CON3, PLL_POWER_DOWN(1)); + mmio_write_32(CRU_BASE + CRU_DPLL_CON0, + mmio_read_32(PARAM_ADDR + PARAM_DPLL_CON0)); + mmio_write_32(CRU_BASE + CRU_DPLL_CON1, + mmio_read_32(PARAM_ADDR + PARAM_DPLL_CON1)); + mmio_write_32(CRU_BASE + CRU_DPLL_CON3, PLL_POWER_DOWN(0)); + + while ((mmio_read_32(CRU_BASE + CRU_DPLL_CON2) & (1u << 31)) == 0) + continue; + + mmio_write_32(CRU_BASE + CRU_DPLL_CON3, PLL_MODE(PLL_NORMAL_MODE)); +} + +__attribute__((noreturn)) void m0_main(void) +{ + mmio_setbits_32(PHY_REG(0, 927), (1 << 22)); + mmio_setbits_32(PHY_REG(1, 927), (1 << 22)); + idle_port(); + + mmio_write_32(CIC_BASE + CIC_CTRL0, + (((0x3 << 4) | (1 << 2) | 1) << 16) | + (1 << 2) | 1 | + mmio_read_32(PARAM_ADDR + PARAM_FREQ_SELECT)); + while ((mmio_read_32(CIC_BASE + CIC_STATUS0) & (1 << 2)) == 0) + continue; + + ddr_set_pll(); + mmio_write_32(CIC_BASE + CIC_CTRL0, 0x20002); + while ((mmio_read_32(CIC_BASE + CIC_STATUS0) & (1 << 0)) == 0) + continue; + + deidle_port(); + mmio_clrbits_32(PHY_REG(0, 927), (1 << 22)); + mmio_clrbits_32(PHY_REG(1, 927), (1 << 22)); + + mmio_write_32(PARAM_ADDR + PARAM_M0_DONE, M0_DONE_FLAG); + + for (;;) + __asm__ volatile ("wfi"); +} diff --git a/plat/rockchip/rk3399/drivers/m0/src/rk3399m0.ld.S b/plat/rockchip/rk3399/drivers/m0/src/rk3399m0.ld.S new file mode 100644 index 0000000..bfe054e --- /dev/null +++ b/plat/rockchip/rk3399/drivers/m0/src/rk3399m0.ld.S @@ -0,0 +1,26 @@ +/* + * Copyright (c) 2016, ARM Limited and Contributors. All rights reserved. + * + * SPDX-License-Identifier: BSD-3-Clause + */ + +#include <m0_param.h> + +OUTPUT_FORMAT("elf32-littlearm") + +SECTIONS { + .m0_bin 0 : { + KEEP(*(.isr_vector)) + ASSERT(. == 0xc0, "ISR vector has the wrong size."); + ASSERT(. == PARAM_ADDR, "M0 params should go right behind ISR table."); + . += PARAM_M0_SIZE; + *(.text*) + *(.rodata*) + *(.data*) + *(.bss*) + . = ALIGN(8); + *(.co_stack*) + } + + /DISCARD/ : { *(.comment) *(.note*) } +} diff --git a/plat/rockchip/rk3399/drivers/m0/src/startup.c b/plat/rockchip/rk3399/drivers/m0/src/startup.c new file mode 100644 index 0000000..dfd8af2 --- /dev/null +++ b/plat/rockchip/rk3399/drivers/m0/src/startup.c @@ -0,0 +1,92 @@ +/* + * Copyright (c) 2016, ARM Limited and Contributors. All rights reserved. + * + * SPDX-License-Identifier: BSD-3-Clause + */ + +#include "rk3399_mcu.h" + +/* Stack configuration */ +#define STACK_SIZE 0x00000040 +__attribute__ ((section(".co_stack"))) +unsigned long pstack[STACK_SIZE]; + +/* Macro definition */ +#define WEAK __attribute__ ((weak)) + +/* System exception vector handler */ +__attribute__ ((used)) +void WEAK reset_handler(void); +void WEAK nmi_handler(void); +void WEAK hardware_fault_handler(void); +void WEAK svc_handler(void); +void WEAK pend_sv_handler(void); +void WEAK systick_handler(void); + +extern int m0_main(void); + +/* Function prototypes */ +static void default_reset_handler(void); +static void default_handler(void); + +/* + * The minimal vector table for a Cortex M3. Note that the proper constructs + * must be placed on this to ensure that it ends up at physical address + * 0x00000000. + */ +__attribute__ ((used, section(".isr_vector"))) +void (* const g_pfnVectors[])(void) = { + /* core Exceptions */ + (void *)&pstack[STACK_SIZE], /* the initial stack pointer */ + reset_handler, + nmi_handler, + hardware_fault_handler, + 0, 0, 0, 0, 0, 0, 0, + svc_handler, + 0, 0, + pend_sv_handler, + systick_handler, + + /* external exceptions */ + 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0 +}; + +/** + * This is the code that gets called when the processor first + * starts execution following a reset event. Only the absolutely + * necessary set is performed, after which the application + * supplied m0_main() routine is called. + */ +static void default_reset_handler(void) +{ + /* call the application's entry point */ + m0_main(); +} + +/** + * Provide weak aliases for each Exception handler to the Default_Handler. + * As they are weak aliases, any function with the same name will override + * this definition. + */ +#pragma weak reset_handler = default_reset_handler +#pragma weak nmi_handler = default_handler +#pragma weak hardware_fault_handler = default_handler +#pragma weak svc_handler = default_handler +#pragma weak pend_sv_handler = default_handler +#pragma weak systick_handler = default_handler + +/** + * This is the code that gets called when the processor receives + * an unexpected interrupt. This simply enters an infinite loop, + * preserving the system state for examination by a debugger. + */ +static void default_handler(void) +{ + /* go into an infinite loop. */ + while (1) + ; +} diff --git a/plat/rockchip/rk3399/drivers/m0/src/stopwatch.c b/plat/rockchip/rk3399/drivers/m0/src/stopwatch.c new file mode 100644 index 0000000..5af8caa --- /dev/null +++ b/plat/rockchip/rk3399/drivers/m0/src/stopwatch.c @@ -0,0 +1,74 @@ +/* + * Copyright (c) 2016, ARM Limited and Contributors. All rights reserved. + * + * SPDX-License-Identifier: BSD-3-Clause + */ + +#include <m0_param.h> +#include "rk3399_mcu.h" + +/* use 24MHz SysTick */ +#define US_TO_CYCLE(US) (US * 24) + +#define SYST_CST 0xe000e010 +/* enable counter */ +#define ENABLE (1 << 0) +/* count down to 0 does not cause SysTick exception to pend */ +#define TICKINT (1 << 1) +/* core clock used for SysTick */ +#define CLKSOURCE (1 << 2) + +#define COUNTFLAG (1 << 16) +#define SYST_RVR 0xe000e014 +#define MAX_VALUE 0xffffff +#define MAX_USECS (MAX_VALUE / US_TO_CYCLE(1)) +#define SYST_CVR 0xe000e018 +#define SYST_CALIB 0xe000e01c + +unsigned int remaining_usecs; + +static inline void stopwatch_set_usecs(void) +{ + unsigned int cycle; + unsigned int usecs = MIN(MAX_USECS, remaining_usecs); + + remaining_usecs -= usecs; + cycle = US_TO_CYCLE(usecs); + mmio_write_32(SYST_RVR, cycle); + mmio_write_32(SYST_CVR, 0); + + mmio_write_32(SYST_CST, ENABLE | TICKINT | CLKSOURCE); +} + +void stopwatch_init_usecs_expire(unsigned int usecs) +{ + /* + * Enter an inifite loop if the stopwatch is in use. This will allow the + * state to be analyzed with a debugger. + */ + if (mmio_read_32(SYST_CST) & ENABLE) + while (1) + ; + + remaining_usecs = usecs; + stopwatch_set_usecs(); +} + +int stopwatch_expired(void) +{ + int val = mmio_read_32(SYST_CST); + if ((val & COUNTFLAG) || !(val & ENABLE)) { + if (!remaining_usecs) + return 1; + + stopwatch_set_usecs(); + } + + return 0; +} + +void stopwatch_reset(void) +{ + mmio_clrbits_32(SYST_CST, ENABLE); + remaining_usecs = 0; +} diff --git a/plat/rockchip/rk3399/drivers/m0/src/suspend.c b/plat/rockchip/rk3399/drivers/m0/src/suspend.c new file mode 100644 index 0000000..9ad2fa2 --- /dev/null +++ b/plat/rockchip/rk3399/drivers/m0/src/suspend.c @@ -0,0 +1,62 @@ +/* + * Copyright (c) 2016, ARM Limited and Contributors. All rights reserved. + * + * SPDX-License-Identifier: BSD-3-Clause + */ + +#include <pmu_regs.h> +#include "rk3399_mcu.h" + +#define M0_SCR 0xe000ed10 /* System Control Register (SCR) */ + +#define SCR_SLEEPDEEP_SHIFT (1 << 2) + +__attribute__((noreturn)) void m0_main(void) +{ + unsigned int status_value; + + /* + * PMU sometimes doesn't clear power mode bit as it's supposed to due + * to a hardware bug. Make the M0 clear it manually to be sure, + * otherwise interrupts some cases with concurrent wake interrupts + * we stay asleep forever. + */ + while (1) { + status_value = mmio_read_32(PMU_BASE + PMU_POWER_ST); + if (status_value) { + mmio_clrbits_32(PMU_BASE + PMU_PWRMODE_CON, 0x01); + break; + } + } + + /* + * FSM power secquence is .. -> ST_INPUT_CLAMP(step.17) -> .. -> + * ST_WAKEUP_RESET -> ST_EXT_PWRUP-> ST_RELEASE_CLAMP -> + * ST_24M_OSC_EN -> .. -> ST_WAKEUP_RESET_CLR(step.26) -> .., + * INPUT_CLAMP and WAKEUP_RESET will hold the SOC not affect by + * power or other single glitch, but WAKEUP_RESET need work with 24MHz, + * so between RELEASE_CLAMP and 24M_OSC_EN, there have a chance + * that glitch will affect SOC, and mess up SOC status, so we + * addressmap_shared software clamp between ST_INPUT_CLAMP and + * ST_WAKEUP_RESET_CLR to avoid this happen. + */ + while (1) { + status_value = mmio_read_32(PMU_BASE + PMU_POWER_ST); + if (status_value >= 17) { + mmio_setbits_32(PMU_BASE + PMU_SFT_CON, 0x02); + break; + } + + } + + while (1) { + status_value = mmio_read_32(PMU_BASE + PMU_POWER_ST); + if (status_value >= 26) { + mmio_clrbits_32(PMU_BASE + PMU_SFT_CON, 0x02); + break; + } + } + + for (;;) + __asm__ volatile ("wfi"); +} |