diff options
Diffstat (limited to 'OptionRomPkg/CirrusLogic5430Dxe/CirrusLogic5430I2c.c')
-rw-r--r-- | OptionRomPkg/CirrusLogic5430Dxe/CirrusLogic5430I2c.c | 433 |
1 files changed, 0 insertions, 433 deletions
diff --git a/OptionRomPkg/CirrusLogic5430Dxe/CirrusLogic5430I2c.c b/OptionRomPkg/CirrusLogic5430Dxe/CirrusLogic5430I2c.c deleted file mode 100644 index 3bfc51205b..0000000000 --- a/OptionRomPkg/CirrusLogic5430Dxe/CirrusLogic5430I2c.c +++ /dev/null @@ -1,433 +0,0 @@ -/** @file
- I2C Bus implementation upon CirrusLogic.
-
- Copyright (c) 2008 - 2009, Intel Corporation. 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 "CirrusLogic5430.h"
-#include "CirrusLogic5430I2c.h"
-
-#define SEQ_ADDRESS_REGISTER 0x3c4
-#define SEQ_DATA_REGISTER 0x3c5
-
-#define I2C_CONTROL 0x08
-#define I2CDAT_IN 7
-#define I2CCLK_IN 2
-#define I2CDAT_OUT 1
-#define I2CCLK_OUT 0
-
-#define I2C_BUS_SPEED 100 //100kbps
-
-/**
- PCI I/O byte write function.
-
- @param PciIo The pointer to PCI_IO_PROTOCOL.
- @param Address The bit map of I2C Data or I2C Clock pins.
- @param Data The date to write.
-
-**/
-VOID
-I2cOutb (
- EFI_PCI_IO_PROTOCOL *PciIo,
- UINTN Address,
- UINT8 Data
- )
-{
- PciIo->Io.Write (
- PciIo,
- EfiPciIoWidthUint8,
- EFI_PCI_IO_PASS_THROUGH_BAR,
- Address,
- 1,
- &Data
- );
-}
-/**
- PCI I/O byte read function.
-
- @param PciIo The pointer to PCI_IO_PROTOCOL.
- @param Address The bit map of I2C Data or I2C Clock pins.
-
- return byte value read from PCI I/O space.
-
-**/
-UINT8
-I2cInb (
- EFI_PCI_IO_PROTOCOL *PciIo,
- UINTN Address
- )
-{
- UINT8 Data;
-
- PciIo->Io.Read (
- PciIo,
- EfiPciIoWidthUint8,
- EFI_PCI_IO_PASS_THROUGH_BAR,
- Address,
- 1,
- &Data
- );
- return Data;
-}
-
-/**
- Read status of I2C Data and I2C Clock Pins.
-
- @param PciIo The pointer to PCI_IO_PROTOCOL.
- @param Blt The bit map of I2C Data or I2C Clock pins.
-
- @retval 0 Low on I2C Data or I2C Clock Pin.
- @retval 1 High on I2C Data or I2C Clock Pin.
-
-**/
-UINT8
-I2cPinRead (
- EFI_PCI_IO_PROTOCOL *PciIo,
- UINT8 Bit
- )
-{
- I2cOutb (PciIo, SEQ_ADDRESS_REGISTER, I2C_CONTROL);
- return (UINT8) ((I2cInb (PciIo, SEQ_DATA_REGISTER) >> Bit ) & 0xfe);
-}
-
-
-/**
- Set/Clear I2C Data and I2C Clock Pins.
-
- @param PciIo The pointer to PCI_IO_PROTOCOL.
- @param Blt The bit map to controller I2C Data or I2C Clock pins.
- @param Value 1 or 0 stands for Set or Clear I2C Data and I2C Clock Pins.
-
-**/
-VOID
-I2cPinWrite (
- EFI_PCI_IO_PROTOCOL *PciIo,
- UINT8 Bit,
- UINT8 Value
- )
-{
- UINT8 Byte;
- I2cOutb (PciIo, SEQ_ADDRESS_REGISTER, I2C_CONTROL);
- Byte = (UINT8) (I2cInb (PciIo, SEQ_DATA_REGISTER) & (UINT8) ~(1 << Bit)) ;
- Byte = (UINT8) (Byte | ((Value & 0x01) << Bit));
- I2cOutb (PciIo, SEQ_DATA_REGISTER, (UINT8) (Byte | 0x40));
- return;
-}
-
-/**
- Read/write delay acoording to I2C Bus Speed.
-
-**/
-VOID
-I2cDelay (
- VOID
- )
-{
- MicroSecondDelay (1000 / I2C_BUS_SPEED);
-}
-
-/**
- Write a 8-bit data onto I2C Data Pin.
-
- @param PciIo The pointer to PCI_IO_PROTOCOL.
- @param Data The byte data to write.
-
-**/
-VOID
-I2cSendByte (
- EFI_PCI_IO_PROTOCOL *PciIo,
- UINT8 Data
- )
-{
- UINTN Index;
- //
- // Send byte data onto I2C Bus
- //
- for (Index = 0; Index < 8; Index --) {
- I2cPinWrite (PciIo, I2CDAT_OUT, (UINT8) (Data >> (7 - Index)));
- I2cPinWrite (PciIo, I2CCLK_OUT, 1);
- I2cDelay ();
- I2cPinWrite (PciIo, I2CCLK_OUT, 0);
- }
-}
-
-/**
- Read a 8-bit data from I2C Data Pin.
-
- @param PciIo The pointer to PCI_IO_PROTOCOL.
-
- Return the byte data read from I2C Data Pin.
-**/
-UINT8
-I2cReceiveByte (
- EFI_PCI_IO_PROTOCOL *PciIo
- )
-{
- UINT8 Data;
- UINTN Index;
-
- Data = 0;
- //
- // Read byte data from I2C Bus
- //
- for (Index = 0; Index < 8; Index --) {
- I2cPinWrite (PciIo, I2CCLK_OUT, 1);
- I2cDelay ();
- Data = (UINT8) (Data << 1);
- Data = (UINT8) (Data | I2cPinRead (PciIo, I2CDAT_IN));
- I2cPinWrite (PciIo, I2CCLK_OUT, 0);
- }
-
- return Data;
-}
-
-/**
- Receive an ACK signal from I2C Bus.
-
- @param PciIo The pointer to PCI_IO_PROTOCOL.
-
-**/
-BOOLEAN
-I2cWaitAck (
- EFI_PCI_IO_PROTOCOL *PciIo
- )
-{
- //
- // Wait for ACK signal
- //
- I2cPinWrite (PciIo, I2CDAT_OUT, 1);
- I2cPinWrite (PciIo, I2CCLK_OUT, 1);
- I2cDelay ();
- if (I2cPinRead (PciIo, I2CDAT_IN) == 0) {
- I2cPinWrite (PciIo, I2CDAT_OUT, 1);
- return TRUE;
- } else {
- return FALSE;
- }
-}
-
-/**
- Send an ACK signal onto I2C Bus.
-
- @param PciIo The pointer to PCI_IO_PROTOCOL.
-
-**/
-VOID
-I2cSendAck (
- EFI_PCI_IO_PROTOCOL *PciIo
- )
-{
- I2cPinWrite (PciIo, I2CCLK_OUT, 1);
- I2cPinWrite (PciIo, I2CDAT_OUT, 1);
- I2cPinWrite (PciIo, I2CDAT_OUT, 0);
- I2cPinWrite (PciIo, I2CCLK_OUT, 0);
-}
-
-/**
- Start a I2C transfer on I2C Bus.
-
- @param PciIo The pointer to PCI_IO_PROTOCOL.
-
-**/
-VOID
-I2cStart (
- EFI_PCI_IO_PROTOCOL *PciIo
- )
-{
- //
- // Init CLK and DAT pins
- //
- I2cPinWrite (PciIo, I2CCLK_OUT, 1);
- I2cPinWrite (PciIo, I2CDAT_OUT, 1);
- //
- // Start a I2C transfer, set SDA low from high, when SCL is high
- //
- I2cPinWrite (PciIo, I2CDAT_OUT, 0);
- I2cPinWrite (PciIo, I2CCLK_OUT, 0);
-}
-
-/**
- Stop a I2C transfer on I2C Bus.
-
- @param PciIo The pointer to PCI_IO_PROTOCOL.
-
-**/
-VOID
-I2cStop (
- EFI_PCI_IO_PROTOCOL *PciIo
- )
-{
- //
- // Stop a I2C transfer, set SDA high from low, when SCL is high
- //
- I2cPinWrite (PciIo, I2CDAT_OUT, 0);
- I2cPinWrite (PciIo, I2CCLK_OUT, 1);
- I2cPinWrite (PciIo, I2CDAT_OUT, 1);
-}
-
-/**
- Read one byte data on I2C Bus.
-
- Read one byte data from the slave device connectet to I2C Bus.
- If Data is NULL, then ASSERT().
-
- @param PciIo The pointer to PCI_IO_PROTOCOL.
- @param DeviceAddress Slave device's address.
- @param RegisterAddress The register address on slave device.
- @param Data The pointer to returned data if EFI_SUCCESS returned.
-
- @retval EFI_DEVICE_ERROR
- @retval EFI_SUCCESS
-
-**/
-EFI_STATUS
-EFIAPI
-I2cReadByte (
- EFI_PCI_IO_PROTOCOL *PciIo,
- UINT8 DeviceAddress,
- UINT8 RegisterAddress,
- UINT8 *Data
- )
-{
- ASSERT (Data != NULL);
-
- //
- // Start I2C transfer
- //
- I2cStart (PciIo);
-
- //
- // Send slave address with enabling write flag
- //
- I2cSendByte (PciIo, (UINT8) (DeviceAddress & 0xfe));
-
- //
- // Wait for ACK signal
- //
- if (I2cWaitAck (PciIo) == FALSE) {
- return EFI_DEVICE_ERROR;
- }
-
- //
- // Send register address
- //
- I2cSendByte (PciIo, RegisterAddress);
-
- //
- // Wait for ACK signal
- //
- if (I2cWaitAck (PciIo) == FALSE) {
- return EFI_DEVICE_ERROR;
- }
-
- //
- // Send slave address with enabling read flag
- //
- I2cSendByte (PciIo, (UINT8) (DeviceAddress | 0x01));
-
- //
- // Wait for ACK signal
- //
- if (I2cWaitAck (PciIo) == FALSE) {
- return EFI_DEVICE_ERROR;
- }
-
- //
- // Read byte data from I2C Bus
- //
- *Data = I2cReceiveByte (PciIo);
-
- //
- // Send ACK signal onto I2C Bus
- //
- I2cSendAck (PciIo);
-
- //
- // Stop a I2C transfer
- //
- I2cStop (PciIo);
-
- return EFI_SUCCESS;
-}
-
-/**
- Write one byte data onto I2C Bus.
-
- Write one byte data to the slave device connectet to I2C Bus.
- If Data is NULL, then ASSERT().
-
- @param PciIo The pointer to PCI_IO_PROTOCOL.
- @param DeviceAddress Slave device's address.
- @param RegisterAddress The register address on slave device.
- @param Data The pointer to write data.
-
- @retval EFI_DEVICE_ERROR
- @retval EFI_SUCCESS
-
-**/
-EFI_STATUS
-EFIAPI
-I2cWriteByte (
- EFI_PCI_IO_PROTOCOL *PciIo,
- UINT8 DeviceAddress,
- UINT8 RegisterAddress,
- UINT8 *Data
- )
-{
- ASSERT (Data != NULL);
-
- I2cStart (PciIo);
- //
- // Send slave address with enabling write flag
- //
- I2cSendByte (PciIo, (UINT8) (DeviceAddress & 0xfe));
-
- //
- // Wait for ACK signal
- //
- if (I2cWaitAck (PciIo) == FALSE) {
- return EFI_DEVICE_ERROR;
- }
-
- //
- // Send register address
- //
- I2cSendByte (PciIo, RegisterAddress);
-
- //
- // Wait for ACK signal
- //
- if (I2cWaitAck (PciIo) == FALSE) {
- return EFI_DEVICE_ERROR;
- }
-
- //
- // Send byte data onto I2C Bus
- //
- I2cSendByte (PciIo, *Data);
-
- //
- // Wait for ACK signal
- //
- if (I2cWaitAck (PciIo) == FALSE) {
- return EFI_DEVICE_ERROR;
- }
-
- //
- // Stop a I2C transfer
- //
- I2cStop (PciIo);
-
- return EFI_SUCCESS;
-}
-
-
-
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