diff options
Diffstat (limited to 'Omap35xxPkg/SmbusDxe/Smbus.c')
| -rw-r--r-- | Omap35xxPkg/SmbusDxe/Smbus.c | 319 |
1 files changed, 0 insertions, 319 deletions
diff --git a/Omap35xxPkg/SmbusDxe/Smbus.c b/Omap35xxPkg/SmbusDxe/Smbus.c deleted file mode 100644 index 894ba33..0000000 --- a/Omap35xxPkg/SmbusDxe/Smbus.c +++ /dev/null @@ -1,319 +0,0 @@ -/** @file
-
- Copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>
-
- SPDX-License-Identifier: BSD-2-Clause-Patent
-
-**/
-
-#include <Uefi.h>
-#include <Omap3530/Omap3530.h>
-
-#include <Library/DebugLib.h>
-#include <Library/IoLib.h>
-#include <Library/UefiBootServicesTableLib.h>
-
-#include <Protocol/SmbusHc.h>
-
-#define MAX_RETRY 1000
-
-//
-// Internal Functions
-//
-STATIC
-EFI_STATUS
-WaitForBusBusy (
- VOID
- )
-{
- UINTN Retry = 0;
-
- while (++Retry < MAX_RETRY && (MmioRead16(I2C_STAT) & BB) == 0x1);
-
- if (Retry == MAX_RETRY) {
- return EFI_TIMEOUT;
- }
-
- return EFI_SUCCESS;
-}
-
-STATIC
-EFI_STATUS
-PollForStatus(
- UINT16 StatusBit
- )
-{
- UINTN Retry = 0;
-
- while(Retry < MAX_RETRY) {
- if (MmioRead16(I2C_STAT) & StatusBit) {
- //Clear particular status bit from Status register.
- MmioOr16(I2C_STAT, StatusBit);
- break;
- }
- Retry++;
- }
-
- if (Retry == MAX_RETRY) {
- return EFI_TIMEOUT;
- }
-
- return EFI_SUCCESS;
-}
-
-STATIC
-EFI_STATUS
-ConfigureI2c (
- VOID
- )
-{
- //Program prescaler to obtain 12-MHz clock
- MmioWrite16(I2C_PSC, 0x0000);
-
- //Program SCLL and SCLH
- //NOTE: Following values are the register dump after U-Boot code executed.
- //We need to figure out how its calculated based on the I2C functional clock and I2C_PSC.
- MmioWrite16(I2C_SCLL, 0x0035);
- MmioWrite16(I2C_SCLH, 0x0035);
-
- //Take the I2C controller out of reset.
- MmioOr16(I2C_CON, I2C_EN);
-
- //Initialize the I2C controller.
-
- //Set I2C controller in Master mode.
- MmioOr16(I2C_CON, MST);
-
- //Enable interrupts for receive/transmit mode.
- MmioOr16(I2C_IE, (XRDY_IE | RRDY_IE | ARDY_IE | NACK_IE));
-
- return EFI_SUCCESS;
-}
-
-STATIC
-EFI_STATUS
-I2CReadOneByte (
- UINT8 *Data
- )
-{
- EFI_STATUS Status;
-
- //I2C bus status checking
- Status = WaitForBusBusy();
- if (EFI_ERROR(Status)) {
- return Status;
- }
-
- //Poll till Receive ready bit is set.
- Status = PollForStatus(RRDY);
- if (EFI_ERROR(Status)) {
- return Status;
- }
-
- *Data = MmioRead8(I2C_DATA);
-
- return EFI_SUCCESS;
-}
-
-STATIC
-EFI_STATUS
-I2CWriteOneByte (
- UINT8 Data
- )
-{
- EFI_STATUS Status;
-
- //I2C bus status checking
- Status = WaitForBusBusy();
- if (EFI_ERROR(Status)) {
- return Status;
- }
-
- //Data transfer
- //Poll till Transmit ready bit is set
- Status = PollForStatus(XRDY);
- if (EFI_ERROR(Status)) {
- return Status;
- }
-
- MmioWrite8(I2C_DATA, Data);
-
- //Wait and check if the NACK is not set.
- gBS->Stall(1000);
- if (MmioRead16(I2C_STAT) & NACK) {
- return EFI_DEVICE_ERROR;
- }
-
- return EFI_SUCCESS;
-}
-
-STATIC
-EFI_STATUS
-SmbusBlockRead (
- OUT UINT8 *Buffer,
- IN UINTN Length
- )
-{
- UINTN Index = 0;
- EFI_STATUS Status = EFI_SUCCESS;
-
- //Transfer configuration for receiving data.
- MmioWrite16(I2C_CNT, Length);
- //Need stop bit before sending data.
- MmioWrite16(I2C_CON, (I2C_EN | MST | STP | STT));
-
- while (Index < Length) {
- //Read a byte
- Status = I2CReadOneByte(&Buffer[Index++]);
- if (EFI_ERROR(Status)) {
- return Status;
- }
- }
-
- //Transfer completion
- Status = PollForStatus(ARDY);
- if (EFI_ERROR(Status)) {
- return Status;
- }
-
- return Status;
-}
-
-STATIC
-EFI_STATUS
-SmbusBlockWrite (
- IN UINT8 *Buffer,
- IN UINTN Length
- )
-{
- UINTN Index = 0;
- EFI_STATUS Status = EFI_SUCCESS;
-
- //Transfer configuration for transmitting data
- MmioWrite16(I2C_CNT, Length);
- MmioWrite16(I2C_CON, (I2C_EN | TRX | MST | STT | STP));
-
- while (Index < Length) {
- //Send a byte
- Status = I2CWriteOneByte(Buffer[Index++]);
- if (EFI_ERROR(Status)) {
- return Status;
- }
- }
-
- //Transfer completion
- Status = PollForStatus(ARDY);
- if (EFI_ERROR(Status)) {
- return Status;
- }
-
- return Status;
-}
-
-//
-// Public Functions.
-//
-EFI_STATUS
-EFIAPI
-SmbusExecute (
- IN CONST EFI_SMBUS_HC_PROTOCOL *This,
- IN CONST EFI_SMBUS_DEVICE_ADDRESS SlaveAddress,
- IN CONST EFI_SMBUS_DEVICE_COMMAND Command,
- IN CONST EFI_SMBUS_OPERATION Operation,
- IN CONST BOOLEAN PecCheck,
- IN OUT UINTN *Length,
- IN OUT VOID *Buffer
- )
-{
- UINT8 *ByteBuffer = Buffer;
- EFI_STATUS Status = EFI_SUCCESS;
- UINT8 SlaveAddr = (UINT8)(SlaveAddress.SmbusDeviceAddress);
-
- if (PecCheck) {
- return EFI_UNSUPPORTED;
- }
-
- if ((Operation != EfiSmbusWriteBlock) && (Operation != EfiSmbusReadBlock)) {
- return EFI_UNSUPPORTED;
- }
-
- //Set the Slave address.
- MmioWrite16(I2C_SA, SlaveAddr);
-
- if (Operation == EfiSmbusReadBlock) {
- Status = SmbusBlockRead(ByteBuffer, *Length);
- } else if (Operation == EfiSmbusWriteBlock) {
- Status = SmbusBlockWrite(ByteBuffer, *Length);
- }
-
- return Status;
-}
-
-EFI_STATUS
-EFIAPI
-SmbusArpDevice (
- IN CONST EFI_SMBUS_HC_PROTOCOL *This,
- IN BOOLEAN ArpAll,
- IN EFI_SMBUS_UDID *SmbusUdid OPTIONAL,
- IN OUT EFI_SMBUS_DEVICE_ADDRESS *SlaveAddress OPTIONAL
- )
-{
- return EFI_UNSUPPORTED;
-}
-
-
-EFI_STATUS
-EFIAPI
-SmbusGetArpMap (
- IN CONST EFI_SMBUS_HC_PROTOCOL *This,
- IN OUT UINTN *Length,
- IN OUT EFI_SMBUS_DEVICE_MAP **SmbusDeviceMap
- )
-{
- return EFI_UNSUPPORTED;
-}
-
-
-EFI_STATUS
-EFIAPI
-SmbusNotify (
- IN CONST EFI_SMBUS_HC_PROTOCOL *This,
- IN CONST EFI_SMBUS_DEVICE_ADDRESS SlaveAddress,
- IN CONST UINTN Data,
- IN CONST EFI_SMBUS_NOTIFY_FUNCTION NotifyFunction
- )
-{
- return EFI_UNSUPPORTED;
-}
-
-EFI_SMBUS_HC_PROTOCOL SmbusProtocol =
-{
- SmbusExecute,
- SmbusArpDevice,
- SmbusGetArpMap,
- SmbusNotify
-};
-
-EFI_STATUS
-InitializeSmbus (
- IN EFI_HANDLE ImageHandle,
- IN EFI_SYSTEM_TABLE *SystemTable
- )
-{
- EFI_HANDLE Handle = NULL;
- EFI_STATUS Status;
-
- //Configure I2C controller.
- Status = ConfigureI2c();
- if (EFI_ERROR(Status)) {
- DEBUG ((EFI_D_ERROR, "InitializeI2c fails.\n"));
- return Status;
- }
-
- // Install the SMBUS interface
- Status = gBS->InstallMultipleProtocolInterfaces(&Handle, &gEfiSmbusHcProtocolGuid, &SmbusProtocol, NULL);
- ASSERT_EFI_ERROR(Status);
-
- return Status;
-}
-
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