diff options
Diffstat (limited to 'ArmPlatformPkg/Drivers/PL061GpioDxe/PL061Gpio.c')
| -rw-r--r-- | ArmPlatformPkg/Drivers/PL061GpioDxe/PL061Gpio.c | 141 |
1 files changed, 106 insertions, 35 deletions
diff --git a/ArmPlatformPkg/Drivers/PL061GpioDxe/PL061Gpio.c b/ArmPlatformPkg/Drivers/PL061GpioDxe/PL061Gpio.c index 38341a3d05..0e2ea61ce8 100644 --- a/ArmPlatformPkg/Drivers/PL061GpioDxe/PL061Gpio.c +++ b/ArmPlatformPkg/Drivers/PL061GpioDxe/PL061Gpio.c @@ -20,6 +20,7 @@ #include <Library/BaseMemoryLib.h>
#include <Library/DebugLib.h>
#include <Library/IoLib.h>
+#include <Library/MemoryAllocationLib.h>
#include <Library/PcdLib.h>
#include <Library/UefiBootServicesTableLib.h>
#include <Library/UefiLib.h>
@@ -28,6 +29,33 @@ #include <Protocol/EmbeddedGpio.h>
#include <Drivers/PL061Gpio.h>
+PLATFORM_GPIO_CONTROLLER *mPL061PlatformGpio;
+
+EFI_STATUS
+EFIAPI
+PL061Locate (
+ IN EMBEDDED_GPIO_PIN Gpio,
+ OUT UINTN *ControllerIndex,
+ OUT UINTN *ControllerOffset,
+ OUT UINTN *RegisterBase
+ )
+{
+ UINT32 Index;
+
+ for (Index = 0; Index < mPL061PlatformGpio->GpioControllerCount; Index++) {
+ if ( (Gpio >= mPL061PlatformGpio->GpioController[Index].GpioIndex)
+ && (Gpio < mPL061PlatformGpio->GpioController[Index].GpioIndex
+ + mPL061PlatformGpio->GpioController[Index].InternalGpioCount)) {
+ *ControllerIndex = Index;
+ *ControllerOffset = Gpio % mPL061PlatformGpio->GpioController[Index].InternalGpioCount;
+ *RegisterBase = mPL061PlatformGpio->GpioController[Index].RegisterBase;
+ return EFI_SUCCESS;
+ }
+ }
+ DEBUG ((EFI_D_ERROR, "%a, failed to locate gpio %d\n", __func__, Gpio));
+ return EFI_INVALID_PARAMETER;
+}
+
//
// The PL061 is a strange beast. The 8-bit data register is aliased across a
// region 0x400 bytes in size, with bits [9:2] of the address operating as a
@@ -88,20 +116,36 @@ PL061Identify ( VOID
)
{
- // Check if this is a PrimeCell Peripheral
- if ( (MmioRead8 (PL061_GPIO_PCELL_ID0) != 0x0D)
- || (MmioRead8 (PL061_GPIO_PCELL_ID1) != 0xF0)
- || (MmioRead8 (PL061_GPIO_PCELL_ID2) != 0x05)
- || (MmioRead8 (PL061_GPIO_PCELL_ID3) != 0xB1)) {
- return EFI_NOT_FOUND;
+ UINTN Index;
+ UINTN RegisterBase;
+
+ if ( (mPL061PlatformGpio->GpioCount == 0)
+ || (mPL061PlatformGpio->GpioControllerCount == 0)) {
+ return EFI_NOT_FOUND;
}
- // Check if this PrimeCell Peripheral is the PL061 GPIO
- if ( (MmioRead8 (PL061_GPIO_PERIPH_ID0) != 0x61)
- || (MmioRead8 (PL061_GPIO_PERIPH_ID1) != 0x10)
- || ((MmioRead8 (PL061_GPIO_PERIPH_ID2) & 0xF) != 0x04)
- || (MmioRead8 (PL061_GPIO_PERIPH_ID3) != 0x00)) {
- return EFI_NOT_FOUND;
+ for (Index = 0; Index < mPL061PlatformGpio->GpioControllerCount; Index++) {
+ if (mPL061PlatformGpio->GpioController[Index].InternalGpioCount != PL061_GPIO_PINS) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ RegisterBase = mPL061PlatformGpio->GpioController[Index].RegisterBase;
+
+ // Check if this is a PrimeCell Peripheral
+ if ( (MmioRead8 (RegisterBase + PL061_GPIO_PCELL_ID0) != 0x0D)
+ || (MmioRead8 (RegisterBase + PL061_GPIO_PCELL_ID1) != 0xF0)
+ || (MmioRead8 (RegisterBase + PL061_GPIO_PCELL_ID2) != 0x05)
+ || (MmioRead8 (RegisterBase + PL061_GPIO_PCELL_ID3) != 0xB1)) {
+ return EFI_NOT_FOUND;
+ }
+
+ // Check if this PrimeCell Peripheral is the PL061 GPIO
+ if ( (MmioRead8 (RegisterBase + PL061_GPIO_PERIPH_ID0) != 0x61)
+ || (MmioRead8 (RegisterBase + PL061_GPIO_PERIPH_ID1) != 0x10)
+ || ((MmioRead8 (RegisterBase + PL061_GPIO_PERIPH_ID2) & 0xF) != 0x04)
+ || (MmioRead8 (RegisterBase + PL061_GPIO_PERIPH_ID3) != 0x00)) {
+ return EFI_NOT_FOUND;
+ }
}
return EFI_SUCCESS;
@@ -132,13 +176,17 @@ Get ( OUT UINTN *Value
)
{
- if ( (Value == NULL)
- || (Gpio > LAST_GPIO_PIN))
- {
+ EFI_STATUS Status = EFI_SUCCESS;
+ UINTN Index, Offset, RegisterBase;
+
+ Status = PL061Locate (Gpio, &Index, &Offset, &RegisterBase);
+ ASSERT_EFI_ERROR (Status);
+
+ if (Value == NULL) {
return EFI_INVALID_PARAMETER;
}
- if (PL061GetPins (PL061_GPIO_DATA_REG, Gpio)) {
+ if (PL061GetPins (RegisterBase + PL061_GPIO_DATA_REG, Offset)) {
*Value = 1;
} else {
*Value = 0;
@@ -174,41 +222,39 @@ Set ( )
{
EFI_STATUS Status = EFI_SUCCESS;
+ UINTN Index, Offset, RegisterBase;
- // Check for errors
- if (Gpio > LAST_GPIO_PIN) {
- Status = EFI_INVALID_PARAMETER;
- goto EXIT;
- }
+ Status = PL061Locate (Gpio, &Index, &Offset, &RegisterBase);
+ ASSERT_EFI_ERROR (Status);
switch (Mode)
{
case GPIO_MODE_INPUT:
// Set the corresponding direction bit to LOW for input
- MmioAnd8 (PL061_GPIO_DIR_REG, ~GPIO_PIN_MASK(Gpio) & 0xFF);
+ MmioAnd8 (RegisterBase + PL061_GPIO_DIR_REG,
+ ~GPIO_PIN_MASK(Offset) & 0xFF);
break;
case GPIO_MODE_OUTPUT_0:
// Set the corresponding direction bit to HIGH for output
- MmioOr8 (PL061_GPIO_DIR_REG, GPIO_PIN_MASK(Gpio));
+ MmioOr8 (RegisterBase + PL061_GPIO_DIR_REG, GPIO_PIN_MASK(Offset));
// Set the corresponding data bit to LOW for 0
- PL061SetPins (PL061_GPIO_DATA_REG, GPIO_PIN_MASK(Gpio), 0);
+ PL061SetPins (RegisterBase + PL061_GPIO_DATA_REG, GPIO_PIN_MASK(Offset), 0);
break;
case GPIO_MODE_OUTPUT_1:
// Set the corresponding direction bit to HIGH for output
- MmioOr8 (PL061_GPIO_DIR_REG, GPIO_PIN_MASK(Gpio));
+ MmioOr8 (RegisterBase + PL061_GPIO_DIR_REG, GPIO_PIN_MASK(Offset));
// Set the corresponding data bit to HIGH for 1
- PL061SetPins (PL061_GPIO_DATA_REG, GPIO_PIN_MASK(Gpio), 0xff);
- break;
+ PL061SetPins (RegisterBase + PL061_GPIO_DATA_REG, GPIO_PIN_MASK(Offset), 0xff);
+ break;
default:
// Other modes are not supported
return EFI_UNSUPPORTED;
}
-EXIT:
- return Status;
+ return EFI_SUCCESS;
}
/**
@@ -237,16 +283,21 @@ GetMode ( OUT EMBEDDED_GPIO_MODE *Mode
)
{
+ EFI_STATUS Status = EFI_SUCCESS;
+ UINTN Index, Offset, RegisterBase;
+
+ Status = PL061Locate (Gpio, &Index, &Offset, &RegisterBase);
+ ASSERT_EFI_ERROR (Status);
+
// Check for errors
- if ( (Mode == NULL)
- || (Gpio > LAST_GPIO_PIN)) {
+ if (Mode == NULL) {
return EFI_INVALID_PARAMETER;
}
// Check if it is input or output
- if (MmioRead8 (PL061_GPIO_DIR_REG) & GPIO_PIN_MASK(Gpio)) {
+ if (MmioRead8 (RegisterBase + PL061_GPIO_DIR_REG) & GPIO_PIN_MASK(Offset)) {
// Pin set to output
- if (PL061GetPins (PL061_GPIO_DATA_REG, GPIO_PIN_MASK(Gpio))) {
+ if (PL061GetPins (RegisterBase + PL061_GPIO_DATA_REG, GPIO_PIN_MASK(Offset))) {
*Mode = GPIO_MODE_OUTPUT_1;
} else {
*Mode = GPIO_MODE_OUTPUT_0;
@@ -315,14 +366,34 @@ PL061InstallProtocol ( IN EFI_SYSTEM_TABLE *SystemTable
)
{
- EFI_STATUS Status;
- EFI_HANDLE Handle;
+ EFI_STATUS Status;
+ EFI_HANDLE Handle;
+ GPIO_CONTROLLER *GpioController;
//
// Make sure the Gpio protocol has not been installed in the system yet.
//
ASSERT_PROTOCOL_ALREADY_INSTALLED (NULL, &gEmbeddedGpioProtocolGuid);
+ Status = gBS->LocateProtocol (&gPlatformGpioProtocolGuid, NULL, (VOID **)&mPL061PlatformGpio);
+ if (EFI_ERROR (Status) && (Status == EFI_NOT_FOUND)) {
+ // Create the mPL061PlatformGpio
+ mPL061PlatformGpio = (PLATFORM_GPIO_CONTROLLER *)AllocateZeroPool (sizeof (PLATFORM_GPIO_CONTROLLER) + sizeof (GPIO_CONTROLLER));
+ if (mPL061PlatformGpio == NULL) {
+ DEBUG ((EFI_D_ERROR, "%a: failed to allocate PLATFORM_GPIO_CONTROLLER\n", __func__));
+ return EFI_BAD_BUFFER_SIZE;
+ }
+
+ mPL061PlatformGpio->GpioCount = PL061_GPIO_PINS;
+ mPL061PlatformGpio->GpioControllerCount = 1;
+ mPL061PlatformGpio->GpioController = (GPIO_CONTROLLER *)((UINTN) mPL061PlatformGpio + sizeof (PLATFORM_GPIO_CONTROLLER));
+
+ GpioController = mPL061PlatformGpio->GpioController;
+ GpioController->RegisterBase = (UINTN) PcdGet32 (PcdPL061GpioBase);
+ GpioController->GpioIndex = 0;
+ GpioController->InternalGpioCount = PL061_GPIO_PINS;
+ }
+
Status = PL061Identify();
if (EFI_ERROR(Status)) {
return EFI_DEVICE_ERROR;
|