Angel Pons submitted this change.
src/**/acpi/smbus.asl: Drop dead code
The `ENABLE_SMBUS_METHODS` symbol is not defined anywhere, so this code
isn't even being tested. So, throw it into the bitbucket before it rots
any further. If anyone needs that code ever again, it's in git history.
Change-Id: I22e3f1ad54e81f811c9660d54f3765f3c6b83f01
Signed-off-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/43024
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Nico Huber <nico.h@gmx.de>
---
M src/soc/intel/broadwell/acpi/smbus.asl
M src/soc/intel/denverton_ns/acpi/smbus.asl
M src/soc/intel/skylake/acpi/smbus.asl
M src/southbridge/intel/common/acpi/smbus.asl
4 files changed, 0 insertions(+), 856 deletions(-)
diff --git a/src/soc/intel/broadwell/acpi/smbus.asl b/src/soc/intel/broadwell/acpi/smbus.asl
index 83c8991..32b0b9c 100644
--- a/src/soc/intel/broadwell/acpi/smbus.asl
+++ b/src/soc/intel/broadwell/acpi/smbus.asl
@@ -5,218 +5,4 @@
Device (SBUS)
{
Name (_ADR, 0x001f0003)
-
-#ifdef ENABLE_SMBUS_METHODS
- OperationRegion (SMBP, PCI_Config, 0x00, 0x100)
- Field(SMBP, DWordAcc, NoLock, Preserve)
- {
- Offset(0x40),
- , 2,
- I2CE, 1
- }
-
- OperationRegion (SMBI, SystemIO, SMBUS_IO_BASE, 0x20)
- Field (SMBI, ByteAcc, NoLock, Preserve)
- {
- HSTS, 8, // Host Status
- , 8,
- HCNT, 8, // Host Control
- HCMD, 8, // Host Command
- TXSA, 8, // Transmit Slave Address
- DAT0, 8, // Host Data 0
- DAT1, 8, // Host Data 1
- HBDB, 8, // Host Block Data Byte
- PECK, 8, // Packet Error Check
- RXSA, 8, // Receive Slave Address
- RXDA, 16, // Receive Slave Data
- AUXS, 8, // Auxiliary Status
- AUXC, 8, // Auxiliary Control
- SLPC, 8, // SMLink Pin Control
- SBPC, 8, // SMBus Pin Control
- SSTS, 8, // Slave Status
- SCMD, 8, // Slave Command
- NADR, 8, // Notify Device Address
- NDLB, 8, // Notify Data Low Byte
- NDLH, 8, // Notify Data High Byte
- }
-
- // Kill all SMBus communication
- Method (KILL, 0, Serialized)
- {
- Or (HCNT, 0x02, HCNT) // Send Kill
- Or (HSTS, 0xff, HSTS) // Clean Status
- }
-
- // Check if last operation completed
- // return Failure = 0, Success = 1
- Method (CMPL, 0, Serialized)
- {
- Store (4000, Local0) // Timeout 200ms in 50us steps
- While (Local0) {
- If (And(HSTS, 0x02)) { // Completion Status?
- Return (1) // Operation Completed
- } Else {
- Stall (50)
- Decrement (Local0)
- If (LEqual(Local0, 0)) {
- KILL()
- }
- }
- }
-
- Return (0) // Failure
- }
-
-
- // Wait for SMBus to become ready
- Method (SRDY, 0, Serialized)
- {
- Store (200, Local0) // Timeout 200ms
- While (Local0) {
- If (And(HSTS, 0x40)) { // IN_USE?
- Sleep(1) // Wait 1ms
- Decrement(Local0) // timeout--
- If (LEqual(Local0, 0)) {
- Return (1)
- }
- } Else {
- Store (0, Local0) // We're ready
- }
- }
-
- Store (4000, Local0) // Timeout 200ms (50us * 4000)
- While (Local0) {
- If (And (HSTS, 0x01)) { // Host Busy?
- Stall(50) // Wait 50us
- Decrement(Local0) // timeout--
- If (LEqual(Local0, 0)) {
- KILL()
- }
- } Else {
- Return (0) // Success
- }
- }
-
- Return (1) // Failure
- }
-
- // SMBus Send Byte
- // Arg0: Address
- // Arg1: Data
- // Return: 1 = Success, 0=Failure
-
- Method (SSXB, 2, Serialized)
- {
-
- // Is the SMBus Controller Ready?
- If (SRDY()) {
- Return (0)
- }
-
- // Send Byte
- Store (0, I2CE) // SMBus Enable
- Store (0xbf, HSTS)
- Store (Arg0, TXSA) // Write Address
- Store (Arg1, HCMD) // Write Data
-
- Store (0x48, HCNT) // Start + Byte Data Protocol
-
- If (CMPL()) {
- Or (HSTS, 0xff, HSTS) // Clean up
- Return (1) // Success
- }
-
- Return (0)
- }
-
-
- // SMBus Receive Byte
- // Arg0: Address
- // Return: 0xffff = Failure, Data (8bit) = Success
-
- Method (SRXB, 2, Serialized)
- {
-
- // Is the SMBus Controller Ready?
- If (SRDY()) {
- Return (0xffff)
- }
-
- // Receive Byte
- Store (0, I2CE) // SMBus Enable
- Store (0xbf, HSTS)
- Store (Or (Arg0, 1), TXSA) // Write Address
-
- Store (0x44, HCNT) // Start
-
- If (CMPL()) {
- Or (HSTS, 0xff, HSTS) // Clean up
- Return (DAT0) // Success
- }
-
- Return (0xffff)
- }
-
-
- // SMBus Write Byte
- // Arg0: Address
- // Arg1: Command
- // Arg2: Data
- // Return: 1 = Success, 0=Failure
-
- Method (SWRB, 3, Serialized)
- {
-
- // Is the SMBus Controller Ready?
- If (SRDY()) {
- Return (0)
- }
-
- // Send Byte
- Store (0, I2CE) // SMBus Enable
- Store (0xbf, HSTS)
- Store (Arg0, TXSA) // Write Address
- Store (Arg1, HCMD) // Write Command
- Store (Arg2, DAT0) // Write Data
-
- Store (0x48, HCNT) // Start + Byte Protocol
-
- If (CMPL()) {
- Or (HSTS, 0xff, HSTS) // Clean up
- Return (1) // Success
- }
-
- Return (0)
- }
-
-
- // SMBus Read Byte
- // Arg0: Address
- // Arg1: Command
- // Return: 0xffff = Failure, Data (8bit) = Success
-
- Method (SRDB, 2, Serialized)
- {
-
- // Is the SMBus Controller Ready?
- If (SRDY()) {
- Return (0xffff)
- }
-
- // Receive Byte
- Store (0, I2CE) // SMBus Enable
- Store (0xbf, HSTS)
- Store (Or (Arg0, 1), TXSA) // Write Address
- Store (Arg1, HCMD) // Command
-
- Store (0x48, HCNT) // Start
-
- If (CMPL()) {
- Or (HSTS, 0xff, HSTS) // Clean up
- Return (DAT0) // Success
- }
-
- Return (0xffff)
- }
-#endif
}
diff --git a/src/soc/intel/denverton_ns/acpi/smbus.asl b/src/soc/intel/denverton_ns/acpi/smbus.asl
index 6397622..7860f60 100644
--- a/src/soc/intel/denverton_ns/acpi/smbus.asl
+++ b/src/soc/intel/denverton_ns/acpi/smbus.asl
@@ -5,218 +5,4 @@
Device (SBUS)
{
Name (_ADR, 0x001f0004)
-
-#ifdef ENABLE_SMBUS_METHODS
- OperationRegion (SMBP, PCI_Config, 0x00, 0x100)
- Field(SMBP, DWordAcc, NoLock, Preserve)
- {
- Offset(0x40),
- , 2,
- I2CE, 1
- }
-
- OperationRegion (SMBI, SystemIO, SMBUS_IO_BASE, 0x20)
- Field (SMBI, ByteAcc, NoLock, Preserve)
- {
- HSTS, 8, // Host Status
- , 8,
- HCNT, 8, // Host Control
- HCMD, 8, // Host Command
- TXSA, 8, // Transmit Slave Address
- DAT0, 8, // Host Data 0
- DAT1, 8, // Host Data 1
- HBDB, 8, // Host Block Data Byte
- PECK, 8, // Packet Error Check
- RXSA, 8, // Receive Slave Address
- RXDA, 16, // Receive Slave Data
- AUXS, 8, // Auxiliary Status
- AUXC, 8, // Auxiliary Control
- SLPC, 8, // SMLink Pin Control
- SBPC, 8, // SMBus Pin Control
- SSTS, 8, // Slave Status
- SCMD, 8, // Slave Command
- NADR, 8, // Notify Device Address
- NDLB, 8, // Notify Data Low Byte
- NDLH, 8, // Notify Data High Byte
- }
-
- // Kill all SMBus communication
- Method (KILL, 0, Serialized)
- {
- Or (HCNT, 0x02, HCNT) // Send Kill
- Or (HSTS, 0xff, HSTS) // Clean Status
- }
-
- // Check if last operation completed
- // return Failure = 0, Success = 1
- Method (CMPL, 0, Serialized)
- {
- Store (4000, Local0) // Timeout 200ms in 50us steps
- While (Local0) {
- If (And(HSTS, 0x02)) { // Completion Status?
- Return (1) // Operation Completed
- } Else {
- Stall (50)
- Decrement (Local0)
- If (LEqual(Local0, 0)) {
- KILL()
- }
- }
- }
-
- Return (0) // Failure
- }
-
-
- // Wait for SMBus to become ready
- Method (SRDY, 0, Serialized)
- {
- Store (200, Local0) // Timeout 200ms
- While (Local0) {
- If (And(HSTS, 0x40)) { // IN_USE?
- Sleep(1) // Wait 1ms
- Decrement(Local0) // timeout--
- If (LEqual(Local0, 0)) {
- Return (1)
- }
- } Else {
- Store (0, Local0) // We're ready
- }
- }
-
- Store (4000, Local0) // Timeout 200ms (50us * 4000)
- While (Local0) {
- If (And (HSTS, 0x01)) { // Host Busy?
- Stall(50) // Wait 50us
- Decrement(Local0) // timeout--
- If (LEqual(Local0, 0)) {
- KILL()
- }
- } Else {
- Return (0) // Success
- }
- }
-
- Return (1) // Failure
- }
-
- // SMBus Send Byte
- // Arg0: Address
- // Arg1: Data
- // Return: 1 = Success, 0=Failure
-
- Method (SSXB, 2, Serialized)
- {
-
- // Is the SMBus Controller Ready?
- If (SRDY()) {
- Return (0)
- }
-
- // Send Byte
- Store (0, I2CE) // SMBus Enable
- Store (0xbf, HSTS)
- Store (Arg0, TXSA) // Write Address
- Store (Arg1, HCMD) // Write Data
-
- Store (0x48, HCNT) // Start + Byte Data Protocol
-
- If (CMPL()) {
- Or (HSTS, 0xff, HSTS) // Clean up
- Return (1) // Success
- }
-
- Return (0)
- }
-
-
- // SMBus Receive Byte
- // Arg0: Address
- // Return: 0xffff = Failure, Data (8bit) = Success
-
- Method (SRXB, 2, Serialized)
- {
-
- // Is the SMBus Controller Ready?
- If (SRDY()) {
- Return (0xffff)
- }
-
- // Receive Byte
- Store (0, I2CE) // SMBus Enable
- Store (0xbf, HSTS)
- Store (Or (Arg0, 1), TXSA) // Write Address
-
- Store (0x44, HCNT) // Start
-
- If (CMPL()) {
- Or (HSTS, 0xff, HSTS) // Clean up
- Return (DAT0) // Success
- }
-
- Return (0xffff)
- }
-
-
- // SMBus Write Byte
- // Arg0: Address
- // Arg1: Command
- // Arg2: Data
- // Return: 1 = Success, 0=Failure
-
- Method (SWRB, 3, Serialized)
- {
-
- // Is the SMBus Controller Ready?
- If (SRDY()) {
- Return (0)
- }
-
- // Send Byte
- Store (0, I2CE) // SMBus Enable
- Store (0xbf, HSTS)
- Store (Arg0, TXSA) // Write Address
- Store (Arg1, HCMD) // Write Command
- Store (Arg2, DAT0) // Write Data
-
- Store (0x48, HCNT) // Start + Byte Protocol
-
- If (CMPL()) {
- Or (HSTS, 0xff, HSTS) // Clean up
- Return (1) // Success
- }
-
- Return (0)
- }
-
-
- // SMBus Read Byte
- // Arg0: Address
- // Arg1: Command
- // Return: 0xffff = Failure, Data (8bit) = Success
-
- Method (SRDB, 2, Serialized)
- {
-
- // Is the SMBus Controller Ready?
- If (SRDY()) {
- Return (0xffff)
- }
-
- // Receive Byte
- Store (0, I2CE) // SMBus Enable
- Store (0xbf, HSTS)
- Store (Or (Arg0, 1), TXSA) // Write Address
- Store (Arg1, HCMD) // Command
-
- Store (0x48, HCNT) // Start
-
- If (CMPL()) {
- Or (HSTS, 0xff, HSTS) // Clean up
- Return (DAT0) // Success
- }
-
- Return (0xffff)
- }
-#endif
}
diff --git a/src/soc/intel/skylake/acpi/smbus.asl b/src/soc/intel/skylake/acpi/smbus.asl
index 6397622..7860f60 100644
--- a/src/soc/intel/skylake/acpi/smbus.asl
+++ b/src/soc/intel/skylake/acpi/smbus.asl
@@ -5,218 +5,4 @@
Device (SBUS)
{
Name (_ADR, 0x001f0004)
-
-#ifdef ENABLE_SMBUS_METHODS
- OperationRegion (SMBP, PCI_Config, 0x00, 0x100)
- Field(SMBP, DWordAcc, NoLock, Preserve)
- {
- Offset(0x40),
- , 2,
- I2CE, 1
- }
-
- OperationRegion (SMBI, SystemIO, SMBUS_IO_BASE, 0x20)
- Field (SMBI, ByteAcc, NoLock, Preserve)
- {
- HSTS, 8, // Host Status
- , 8,
- HCNT, 8, // Host Control
- HCMD, 8, // Host Command
- TXSA, 8, // Transmit Slave Address
- DAT0, 8, // Host Data 0
- DAT1, 8, // Host Data 1
- HBDB, 8, // Host Block Data Byte
- PECK, 8, // Packet Error Check
- RXSA, 8, // Receive Slave Address
- RXDA, 16, // Receive Slave Data
- AUXS, 8, // Auxiliary Status
- AUXC, 8, // Auxiliary Control
- SLPC, 8, // SMLink Pin Control
- SBPC, 8, // SMBus Pin Control
- SSTS, 8, // Slave Status
- SCMD, 8, // Slave Command
- NADR, 8, // Notify Device Address
- NDLB, 8, // Notify Data Low Byte
- NDLH, 8, // Notify Data High Byte
- }
-
- // Kill all SMBus communication
- Method (KILL, 0, Serialized)
- {
- Or (HCNT, 0x02, HCNT) // Send Kill
- Or (HSTS, 0xff, HSTS) // Clean Status
- }
-
- // Check if last operation completed
- // return Failure = 0, Success = 1
- Method (CMPL, 0, Serialized)
- {
- Store (4000, Local0) // Timeout 200ms in 50us steps
- While (Local0) {
- If (And(HSTS, 0x02)) { // Completion Status?
- Return (1) // Operation Completed
- } Else {
- Stall (50)
- Decrement (Local0)
- If (LEqual(Local0, 0)) {
- KILL()
- }
- }
- }
-
- Return (0) // Failure
- }
-
-
- // Wait for SMBus to become ready
- Method (SRDY, 0, Serialized)
- {
- Store (200, Local0) // Timeout 200ms
- While (Local0) {
- If (And(HSTS, 0x40)) { // IN_USE?
- Sleep(1) // Wait 1ms
- Decrement(Local0) // timeout--
- If (LEqual(Local0, 0)) {
- Return (1)
- }
- } Else {
- Store (0, Local0) // We're ready
- }
- }
-
- Store (4000, Local0) // Timeout 200ms (50us * 4000)
- While (Local0) {
- If (And (HSTS, 0x01)) { // Host Busy?
- Stall(50) // Wait 50us
- Decrement(Local0) // timeout--
- If (LEqual(Local0, 0)) {
- KILL()
- }
- } Else {
- Return (0) // Success
- }
- }
-
- Return (1) // Failure
- }
-
- // SMBus Send Byte
- // Arg0: Address
- // Arg1: Data
- // Return: 1 = Success, 0=Failure
-
- Method (SSXB, 2, Serialized)
- {
-
- // Is the SMBus Controller Ready?
- If (SRDY()) {
- Return (0)
- }
-
- // Send Byte
- Store (0, I2CE) // SMBus Enable
- Store (0xbf, HSTS)
- Store (Arg0, TXSA) // Write Address
- Store (Arg1, HCMD) // Write Data
-
- Store (0x48, HCNT) // Start + Byte Data Protocol
-
- If (CMPL()) {
- Or (HSTS, 0xff, HSTS) // Clean up
- Return (1) // Success
- }
-
- Return (0)
- }
-
-
- // SMBus Receive Byte
- // Arg0: Address
- // Return: 0xffff = Failure, Data (8bit) = Success
-
- Method (SRXB, 2, Serialized)
- {
-
- // Is the SMBus Controller Ready?
- If (SRDY()) {
- Return (0xffff)
- }
-
- // Receive Byte
- Store (0, I2CE) // SMBus Enable
- Store (0xbf, HSTS)
- Store (Or (Arg0, 1), TXSA) // Write Address
-
- Store (0x44, HCNT) // Start
-
- If (CMPL()) {
- Or (HSTS, 0xff, HSTS) // Clean up
- Return (DAT0) // Success
- }
-
- Return (0xffff)
- }
-
-
- // SMBus Write Byte
- // Arg0: Address
- // Arg1: Command
- // Arg2: Data
- // Return: 1 = Success, 0=Failure
-
- Method (SWRB, 3, Serialized)
- {
-
- // Is the SMBus Controller Ready?
- If (SRDY()) {
- Return (0)
- }
-
- // Send Byte
- Store (0, I2CE) // SMBus Enable
- Store (0xbf, HSTS)
- Store (Arg0, TXSA) // Write Address
- Store (Arg1, HCMD) // Write Command
- Store (Arg2, DAT0) // Write Data
-
- Store (0x48, HCNT) // Start + Byte Protocol
-
- If (CMPL()) {
- Or (HSTS, 0xff, HSTS) // Clean up
- Return (1) // Success
- }
-
- Return (0)
- }
-
-
- // SMBus Read Byte
- // Arg0: Address
- // Arg1: Command
- // Return: 0xffff = Failure, Data (8bit) = Success
-
- Method (SRDB, 2, Serialized)
- {
-
- // Is the SMBus Controller Ready?
- If (SRDY()) {
- Return (0xffff)
- }
-
- // Receive Byte
- Store (0, I2CE) // SMBus Enable
- Store (0xbf, HSTS)
- Store (Or (Arg0, 1), TXSA) // Write Address
- Store (Arg1, HCMD) // Command
-
- Store (0x48, HCNT) // Start
-
- If (CMPL()) {
- Or (HSTS, 0xff, HSTS) // Clean up
- Return (DAT0) // Success
- }
-
- Return (0xffff)
- }
-#endif
}
diff --git a/src/southbridge/intel/common/acpi/smbus.asl b/src/southbridge/intel/common/acpi/smbus.asl
index cc9c4e2..32b0b9c 100644
--- a/src/southbridge/intel/common/acpi/smbus.asl
+++ b/src/southbridge/intel/common/acpi/smbus.asl
@@ -5,218 +5,4 @@
Device (SBUS)
{
Name (_ADR, 0x001f0003)
-
-#ifdef ENABLE_SMBUS_METHODS
- OperationRegion (SMBP, PCI_Config, 0x00, 0x100)
- Field(SMBP, DWordAcc, NoLock, Preserve)
- {
- Offset(0x40),
- , 2,
- I2CE, 1
- }
-
- OperationRegion (SMBI, SystemIO, SMBUS_IO_BASE, 0x20)
- Field (SMBI, ByteAcc, NoLock, Preserve)
- {
- HSTS, 8, // Host Status
- , 8,
- HCNT, 8, // Host Control
- HCMD, 8, // Host Command
- TXSA, 8, // Transmit Slave Address
- DAT0, 8, // Host Data 0
- DAT1, 8, // Host Data 1
- HBDB, 8, // Host Block Data Byte
- PECK, 8, // Packet Error Check
- RXSA, 8, // Receive Slave Address
- RXDA, 16, // Receive Slave Data
- AUXS, 8, // Auxiliary Status
- AUXC, 8, // Auxiliary Control
- SLPC, 8, // SMLink Pin Control
- SBPC, 8, // SMBus Pin Control
- SSTS, 8, // Slave Status
- SCMD, 8, // Slave Command
- NADR, 8, // Notify Device Address
- NDLB, 8, // Notify Data Low Byte
- NDLH, 8, // Notify Data High Byte
- }
-
- // Kill all SMBus communication
- Method (KILL, 0, Serialized)
- {
- HCNT |= 0x02 // Send Kill
- HSTS |= 0xff // Clean Status
- }
-
- // Check if last operation completed
- // return Failure = 0, Success = 1
- Method (CMPL, 0, Serialized)
- {
- Local0 = 4000 // Timeout 200ms in 50us steps
- While (Local0) {
- If (HSTS & 0x02) { // Completion Status?
- Return (1) // Operation Completed
- } Else {
- Stall (50)
- Local0--
- If (Local0 == 0) {
- KILL()
- }
- }
- }
-
- Return (0) // Failure
- }
-
-
- // Wait for SMBus to become ready
- Method (SRDY, 0, Serialized)
- {
- Local0 = 200 // Timeout 200ms
- While (Local0) {
- If (HSTS & 0x40) { // IN_USE?
- Sleep(1) // Wait 1ms
- Local0-- // timeout--
- If (Local0 == 0) {
- Return (1)
- }
- } Else {
- Local0 = 0 // We're ready
- }
- }
-
- Local0 = 4000 // Timeout 200ms (50us * 4000)
- While (Local0) {
- If (HSTS & 0x01) { // Host Busy?
- Stall(50) // Wait 50us
- Local0-- // timeout--
- If (Local0 == 0) {
- KILL()
- }
- } Else {
- Return (0) // Success
- }
- }
-
- Return (1) // Failure
- }
-
- // SMBus Send Byte
- // Arg0: Address
- // Arg1: Data
- // Return: 1 = Success, 0=Failure
-
- Method (SSXB, 2, Serialized)
- {
-
- // Is the SMBus Controller Ready?
- If (SRDY()) {
- Return (0)
- }
-
- // Send Byte
- I2CE = 0 // SMBus Enable
- HSTS = 0xbf
- TXSA = Arg0 // Write Address
- HCMD = Arg1 // Write Data
-
- HCNT = 0x48 // Start + Byte Data Protocol
-
- If (CMPL()) {
- HSTS |= 0xff // Clean up
- Return (1) // Success
- }
-
- Return (0)
- }
-
-
- // SMBus Receive Byte
- // Arg0: Address
- // Return: 0xffff = Failure, Data (8bit) = Success
-
- Method (SRXB, 2, Serialized)
- {
-
- // Is the SMBus Controller Ready?
- If (SRDY()) {
- Return (0xffff)
- }
-
- // Receive Byte
- I2CE = 0 // SMBus Enable
- HSTS = 0xbf
- TXSA = Arg0 | 1 // Write Address
-
- HCNT = 0x44 // Start
-
- If (CMPL()) {
- HSTS |= 0xff // Clean up
- Return (DAT0) // Success
- }
-
- Return (0xffff)
- }
-
-
- // SMBus Write Byte
- // Arg0: Address
- // Arg1: Command
- // Arg2: Data
- // Return: 1 = Success, 0=Failure
-
- Method (SWRB, 3, Serialized)
- {
-
- // Is the SMBus Controller Ready?
- If (SRDY()) {
- Return (0)
- }
-
- // Send Byte
- I2CE = 0 // SMBus Enable
- HSTS = 0xbf
- TXSA = Arg0 // Write Address
- HCMD = Arg1 // Write Command
- DAT0 = Arg2 // Write Data
-
- HCNT = 0x48 // Start + Byte Protocol
-
- If (CMPL()) {
- HSTS |= 0xff // Clean up
- Return (1) // Success
- }
-
- Return (0)
- }
-
-
- // SMBus Read Byte
- // Arg0: Address
- // Arg1: Command
- // Return: 0xffff = Failure, Data (8bit) = Success
-
- Method (SRDB, 2, Serialized)
- {
-
- // Is the SMBus Controller Ready?
- If (SRDY()) {
- Return (0xffff)
- }
-
- // Receive Byte
- I2CE = 0 // SMBus Enable
- HSTS = 0xbf
- TXSA = Arg0 | 1 // Write Address
- HCMD = Arg1 // Command
-
- HCNT = 0x48 // Start
-
- If (CMPL()) {
- HSTS |= 0xff // Clean up
- Return (DAT0) // Success
- }
-
- Return (0xffff)
- }
-#endif
}
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