diff options
Diffstat (limited to 'SamsungPlatformPkgOrigen/ExynosPkg/TimerDxe/TimerDxe.c')
| -rwxr-xr-x | SamsungPlatformPkgOrigen/ExynosPkg/TimerDxe/TimerDxe.c | 432 |
1 files changed, 0 insertions, 432 deletions
diff --git a/SamsungPlatformPkgOrigen/ExynosPkg/TimerDxe/TimerDxe.c b/SamsungPlatformPkgOrigen/ExynosPkg/TimerDxe/TimerDxe.c deleted file mode 100755 index ea245343d..000000000 --- a/SamsungPlatformPkgOrigen/ExynosPkg/TimerDxe/TimerDxe.c +++ /dev/null @@ -1,432 +0,0 @@ -/** @file - Template for Timer Architecture Protocol driver of the ARM flavor - - Copyright (c) 2011, Samsung Electronics Co. All rights reserved.<BR> - - This program and the accompanying materials - are licensed and made available under the terms and conditions of the BSD License - which accompanies this distribution. The full text of the license may be found at - http://opensource.org/licenses/bsd-license.php - - THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, - WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. - -**/ - - -#include <PiDxe.h> - -#include <Library/BaseLib.h> -#include <Library/DebugLib.h> -#include <Library/BaseMemoryLib.h> -#include <Library/UefiBootServicesTableLib.h> -#include <Library/UefiLib.h> -#include <Library/PcdLib.h> -#include <Library/IoLib.h> - -#include <Protocol/Timer.h> -#include <Protocol/HardwareInterrupt.h> - -#include <Library/ExynosTimerLib.h> -#include <Platform/ArmPlatform.h> - -// The notification function to call on every timer interrupt. -volatile EFI_TIMER_NOTIFY mTimerNotifyFunction = (EFI_TIMER_NOTIFY)NULL; -EFI_EVENT EfiExitBootServicesEvent = (EFI_EVENT)NULL; - -// The current period of the timer interrupt -volatile UINT64 mTimerPeriod = 0; - -// Cached copy of the Hardware Interrupt protocol instance -EFI_HARDWARE_INTERRUPT_PROTOCOL *gInterrupt = NULL; - -// Cached interrupt vector -UINTN gVector; - -UINT32 mLastTickCount; - -/** - - C Interrupt Handler called in the interrupt context when Source interrupt is active. - - - @param Source Source of the interrupt. Hardware routing off a specific platform defines - what source means. - - @param SystemContext Pointer to system register context. Mostly used by debuggers and will - update the system context after the return from the interrupt if - modified. Don't change these values unless you know what you are doing - -**/ -VOID -EFIAPI -TimerInterruptHandler ( - IN HARDWARE_INTERRUPT_SOURCE Source, - IN EFI_SYSTEM_CONTEXT SystemContext - ) -{ - EFI_TPL OriginalTPL; - UINT32 IntStatus; - UINT32 PWMTimerBase; - EFI_STATUS Status; - - PWMTimerBase=PcdGet32(PcdPWMTimerBase); - // - // DXE core uses this callback for the EFI timer tick. The DXE core uses locks - // that raise to TPL_HIGH and then restore back to current level. Thus we need - // to make sure TPL level is set to TPL_HIGH while we are handling the timer tick. - // - OriginalTPL = gBS->RaiseTPL (TPL_HIGH_LEVEL); - - // clear the interrupt - IntStatus = MmioRead32 (PWMTimerBase + PWM_TINT_CSTAT_OFFSET); - if(IntStatus & TIMER_STATUS_MASK(TIMER_0)){ - MmioWrite32 ((PWMTimerBase + PWM_TINT_CSTAT_OFFSET),(IntStatus | TIMER_STATUS_MASK(TIMER_0))); - Status = RETURN_SUCCESS; - DEBUG ((EFI_D_INFO, "\nTimer 0 ISR\n")); - } - if(IntStatus & TIMER_STATUS_MASK(TIMER_1)){ - MmioWrite32 ((PWMTimerBase + PWM_TINT_CSTAT_OFFSET),(IntStatus | TIMER_STATUS_MASK(TIMER_1))); - Status = RETURN_SUCCESS; - DEBUG ((EFI_D_INFO, "\nTimer 1 ISR\n")); - } - if(IntStatus & TIMER_STATUS_MASK(TIMER_2)){ - MmioWrite32 ((PWMTimerBase + PWM_TINT_CSTAT_OFFSET),(IntStatus | TIMER_STATUS_MASK(TIMER_2))); - Status = RETURN_SUCCESS; - DEBUG ((EFI_D_INFO, "\nTimer 2 ISR\n")); - } - if(IntStatus & TIMER_STATUS_MASK(TIMER_3)){ - MmioWrite32 ((PWMTimerBase + PWM_TINT_CSTAT_OFFSET),(IntStatus | TIMER_STATUS_MASK(TIMER_3))); - Status = RETURN_SUCCESS; - DEBUG ((EFI_D_INFO, "\nTimer 3 ISR\n")); - } - if(IntStatus & TIMER_STATUS_MASK(TIMER_4)){ - MmioWrite32 ((PWMTimerBase + PWM_TINT_CSTAT_OFFSET),(IntStatus | TIMER_STATUS_MASK(TIMER_4))); - Status = RETURN_SUCCESS; - DEBUG ((EFI_D_INFO, "\nTimer 4 ISR\n")); - } - if(EFI_ERROR(Status)){ - Status = RETURN_UNSUPPORTED; - ASSERT_EFI_ERROR(FALSE); - } - // signal end of interrupt early to help avoid losing subsequent ticks from long duration handlers - gInterrupt->EndOfInterrupt (gInterrupt, Source); - - if (mTimerNotifyFunction) { - mTimerNotifyFunction (mTimerPeriod); - } - - gBS->RestoreTPL (OriginalTPL); -} - -/** - This function registers the handler NotifyFunction so it is called every time - the timer interrupt fires. It also passes the amount of time since the last - handler call to the NotifyFunction. If NotifyFunction is NULL, then the - handler is unregistered. If the handler is registered, then EFI_SUCCESS is - returned. If the CPU does not support registering a timer interrupt handler, - then EFI_UNSUPPORTED is returned. If an attempt is made to register a handler - when a handler is already registered, then EFI_ALREADY_STARTED is returned. - If an attempt is made to unregister a handler when a handler is not registered, - then EFI_INVALID_PARAMETER is returned. If an error occurs attempting to - register the NotifyFunction with the timer interrupt, then EFI_DEVICE_ERROR - is returned. - - @param This The EFI_TIMER_ARCH_PROTOCOL instance. - @param NotifyFunction The function to call when a timer interrupt fires. This - function executes at TPL_HIGH_LEVEL. The DXE Core will - register a handler for the timer interrupt, so it can know - how much time has passed. This information is used to - signal timer based events. NULL will unregister the handler. - @retval EFI_SUCCESS The timer handler was registered. - @retval EFI_UNSUPPORTED The platform does not support timer interrupts. - @retval EFI_ALREADY_STARTED NotifyFunction is not NULL, and a handler is already - registered. - @retval EFI_INVALID_PARAMETER NotifyFunction is NULL, and a handler was not - previously registered. - @retval EFI_DEVICE_ERROR The timer handler could not be registered. - -**/ -EFI_STATUS -EFIAPI -TimerDriverRegisterHandler ( - IN EFI_TIMER_ARCH_PROTOCOL *This, - IN EFI_TIMER_NOTIFY NotifyFunction - ) -{ - if ((NotifyFunction == NULL) && (mTimerNotifyFunction == NULL)) { - return EFI_INVALID_PARAMETER; - } - - if ((NotifyFunction != NULL) && (mTimerNotifyFunction != NULL)) { - return EFI_ALREADY_STARTED; - } - - DEBUG ((EFI_D_INFO, "Handler Registered Successfully\n")); - mTimerNotifyFunction = NotifyFunction; - - return EFI_SUCCESS; -} - -/** - Make sure all ArrmVe Timers are disabled -**/ -VOID -EFIAPI -ExitBootServicesEvent ( - IN EFI_EVENT Event, - IN VOID *Context - ) -{ - UINT32 PWMTimerBase; - - PWMTimerBase=PcdGet32(PcdPWMTimerBase); - // All PWM timer is off - MmioWrite32 ((PWMTimerBase + PWM_TCON_OFFSET), 0); - DEBUG ((EFI_D_INFO, "\nTimer Exit\n")); -} - -/** - - This function adjusts the period of timer interrupts to the value specified - by TimerPeriod. If the timer period is updated, then the selected timer - period is stored in EFI_TIMER.TimerPeriod, and EFI_SUCCESS is returned. If - the timer hardware is not programmable, then EFI_UNSUPPORTED is returned. - If an error occurs while attempting to update the timer period, then the - timer hardware will be put back in its state prior to this call, and - EFI_DEVICE_ERROR is returned. If TimerPeriod is 0, then the timer interrupt - is disabled. This is not the same as disabling the CPU's interrupts. - Instead, it must either turn off the timer hardware, or it must adjust the - interrupt controller so that a CPU interrupt is not generated when the timer - interrupt fires. - - @param This The EFI_TIMER_ARCH_PROTOCOL instance. - @param TimerPeriod The rate to program the timer interrupt in 100 nS units. If - the timer hardware is not programmable, then EFI_UNSUPPORTED is - returned. If the timer is programmable, then the timer period - will be rounded up to the nearest timer period that is supported - by the timer hardware. If TimerPeriod is set to 0, then the - timer interrupts will be disabled. - - - @retval EFI_SUCCESS The timer period was changed. - @retval EFI_UNSUPPORTED The platform cannot change the period of the timer interrupt. - @retval EFI_DEVICE_ERROR The timer period could not be changed due to a device error. - -**/ -EFI_STATUS -EFIAPI -TimerDriverSetTimerPeriod ( - IN EFI_TIMER_ARCH_PROTOCOL *This, - IN UINT64 TimerPeriod - ) -{ - EFI_STATUS Status; - UINT64 TimerTicks; - UINT32 rwVal; - UINT32 PWMTimerBase; - - DEBUG ((EFI_D_INFO, "\nSetTimer called\n")); - PWMTimerBase=PcdGet32(PcdPWMTimerBase); - // Stop PWM timer 0 - rwVal = MmioRead32 (PWMTimerBase + PWM_TCON_OFFSET); - MmioWrite32 ((PWMTimerBase + PWM_TCON_OFFSET),STOP_TIMER_VAL(TIMER_0)); - - if (TimerPeriod == 0) { - // leave timer disabled from above, and... - rwVal = MmioRead32 (PWMTimerBase + PWM_TINT_CSTAT_OFFSET); - MmioWrite32 ((PWMTimerBase + PWM_TINT_CSTAT_OFFSET),(rwVal & ~TIMER_INTR_MASK(TIMER_0))); - // disable timer 0/1 interrupt for a TimerPeriod of 0 - Status = gInterrupt->DisableInterruptSource (gInterrupt, gVector); - } else { - // Convert TimerPeriod into 1MHz clock counts (us units = 100ns units / 10) - TimerTicks = DivU64x32 (TimerPeriod, 10); - // if it's larger than 32-bits, pin to highest value - if (TimerTicks > 0xffffffff) { - TimerTicks = 0xffffffff; - } - - // PWM Timer 0 used by Period counter with Auto re-load mode - MmioWrite32 ((PWMTimerBase + PWM_TCNTB0_OFFSET), TimerTicks); - // Set and Clear PWM Manually update for Timer 0 - rwVal = MmioRead32 (PWMTimerBase + PWM_TCON_OFFSET); - MmioWrite32 ((PWMTimerBase + PWM_TCON_OFFSET), rwVal | UPDATE_COUNT_BUF_MASK(TIMER_0)); - MmioWrite32 ((PWMTimerBase + PWM_TCON_OFFSET), rwVal & ~UPDATE_COUNT_BUF_MASK(TIMER_0)); - - // Set Auto re-load and start Timer - MmioWrite32 ((PWMTimerBase + PWM_TCON_OFFSET), rwVal | RELOAD_AND_START(TIMER_0)); - - //PWM Timer0 INT enable - rwVal = MmioRead32 (PWMTimerBase + PWM_TINT_CSTAT_OFFSET); - MmioWrite32 ((PWMTimerBase + PWM_TINT_CSTAT_OFFSET), rwVal | TIMER_INTR_MASK(TIMER_0) ); - - Status = gInterrupt->EnableInterruptSource (gInterrupt, gVector); - } - - // Save the new timer period - mTimerPeriod = TimerPeriod; - return Status; -} - -/** - This function retrieves the period of timer interrupts in 100 ns units, - returns that value in TimerPeriod, and returns EFI_SUCCESS. If TimerPeriod - is NULL, then EFI_INVALID_PARAMETER is returned. If a TimerPeriod of 0 is - returned, then the timer is currently disabled. - - @param This The EFI_TIMER_ARCH_PROTOCOL instance. - @param TimerPeriod A pointer to the timer period to retrieve in 100 ns units. If - 0 is returned, then the timer is currently disabled. - - - @retval EFI_SUCCESS The timer period was returned in TimerPeriod. - @retval EFI_INVALID_PARAMETER TimerPeriod is NULL. - -**/ -EFI_STATUS -EFIAPI -TimerDriverGetTimerPeriod ( - IN EFI_TIMER_ARCH_PROTOCOL *This, - OUT UINT64 *TimerPeriod - ) -{ - if (TimerPeriod == NULL) { - return EFI_INVALID_PARAMETER; - } - - *TimerPeriod = mTimerPeriod; - return EFI_SUCCESS; -} - -/** - This function generates a soft timer interrupt. If the platform does not support soft - timer interrupts, then EFI_UNSUPPORTED is returned. Otherwise, EFI_SUCCESS is returned. - If a handler has been registered through the EFI_TIMER_ARCH_PROTOCOL.RegisterHandler() - service, then a soft timer interrupt will be generated. If the timer interrupt is - enabled when this service is called, then the registered handler will be invoked. The - registered handler should not be able to distinguish a hardware-generated timer - interrupt from a software-generated timer interrupt. - - @param This The EFI_TIMER_ARCH_PROTOCOL instance. - - @retval EFI_SUCCESS The soft timer interrupt was generated. - @retval EFI_UNSUPPORTED The platform does not support the generation of soft timer interrupts. - -**/ -EFI_STATUS -EFIAPI -TimerDriverGenerateSoftInterrupt ( - IN EFI_TIMER_ARCH_PROTOCOL *This - ) -{ - return EFI_UNSUPPORTED; -} - -/** - Interface structure for the Timer Architectural Protocol. - - @par Protocol Description: - This protocol provides the services to initialize a periodic timer - interrupt, and to register a handler that is called each time the timer - interrupt fires. It may also provide a service to adjust the rate of the - periodic timer interrupt. When a timer interrupt occurs, the handler is - passed the amount of time that has passed since the previous timer - interrupt. - - @param RegisterHandler - Registers a handler that will be called each time the - timer interrupt fires. TimerPeriod defines the minimum - time between timer interrupts, so TimerPeriod will also - be the minimum time between calls to the registered - handler. - - @param SetTimerPeriod - Sets the period of the timer interrupt in 100 nS units. - This function is optional, and may return EFI_UNSUPPORTED. - If this function is supported, then the timer period will - be rounded up to the nearest supported timer period. - - - @param GetTimerPeriod - Retrieves the period of the timer interrupt in 100 nS units. - - @param GenerateSoftInterrupt - Generates a soft timer interrupt that simulates the firing of - the timer interrupt. This service can be used to invoke the registered handler if the timer interrupt has been masked for - a period of time. - -**/ -EFI_TIMER_ARCH_PROTOCOL gTimer = { - TimerDriverRegisterHandler, - TimerDriverSetTimerPeriod, - TimerDriverGetTimerPeriod, - TimerDriverGenerateSoftInterrupt -}; - - -/** - Initialize the state information for the Timer Architectural Protocol and - the Timer Debug support protocol that allows the debugger to break into a - running program. - - @param ImageHandle of the loaded driver - @param SystemTable Pointer to the System Table - - @retval EFI_SUCCESS Protocol registered - @retval EFI_OUT_OF_RESOURCES Cannot allocate protocol data structure - @retval EFI_DEVICE_ERROR Hardware problems - -**/ -EFI_STATUS -EFIAPI -TimerInitialize ( - IN EFI_HANDLE ImageHandle, - IN EFI_SYSTEM_TABLE *SystemTable - ) -{ - EFI_HANDLE Handle = NULL; - EFI_STATUS Status; - - UINT32 Tmp; - UINT32 PWMTimerBase; - - PWMTimerBase=PcdGet32(PcdPWMTimerBase); - // Find the interrupt controller protocol. ASSERT if not found. - Status = gBS->LocateProtocol (&gHardwareInterruptProtocolGuid, NULL, (VOID **)&gInterrupt); - ASSERT_EFI_ERROR (Status); - - // PWM Input source clock is 100Mhz and Configure 1Mhz for PWM Timer - Tmp = MmioRead32 (PWMTimerBase + PWM_TCFG0_OFFSET); - Tmp &= ~(0xFF << PRESCALE_GRP0_START_POS); - Tmp |= (PRESCALE_TIMER_GRP0 << PRESCALE_GRP0_START_POS); - MmioWrite32 ((PWMTimerBase + PWM_TCFG0_OFFSET), Tmp); - MmioWrite32 ((PWMTimerBase + PWM_TCFG1_OFFSET), 0); - - // Disable the timer - Status = TimerDriverSetTimerPeriod (&gTimer, 0); - ASSERT_EFI_ERROR (Status); - - // Install interrupt handler - gVector = PWM_TIMER0_INTERRUPT_NUM; - Status = gInterrupt->RegisterInterruptSource (gInterrupt, gVector, TimerInterruptHandler); - ASSERT_EFI_ERROR (Status); - - // PWM Timer 0 used by Period counter with Auto re-load mode - MmioWrite32 ((PWMTimerBase + PWM_TCNTB0_OFFSET), FixedPcdGet32(PcdTimerPeriod)); - Status = TimerDriverSetTimerPeriod (&gTimer, FixedPcdGet32(PcdTimerPeriod)); - ASSERT_EFI_ERROR (Status); - - // Install the Timer Architectural Protocol onto a new handle - Status = gBS->InstallMultipleProtocolInterfaces( - &Handle, - &gEfiTimerArchProtocolGuid, &gTimer, - NULL - ); - ASSERT_EFI_ERROR(Status); - - // Register for an ExitBootServicesEvent - Status = gBS->CreateEvent (EVT_SIGNAL_EXIT_BOOT_SERVICES, TPL_NOTIFY, ExitBootServicesEvent, NULL, &EfiExitBootServicesEvent); - ASSERT_EFI_ERROR (Status); - - return Status; -} |