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authorElyes HAOUAS <ehaouas@noos.fr>2019-10-31 10:12:02 +0100
committerPatrick Georgi <pgeorgi@google.com>2019-11-04 11:35:16 +0000
commit085ab5a3472689fcd6c7d0e4c4fee2d8b4cdb763 (patch)
tree058da8257faf0c8e8c0235fdfe2c5f0febcf4c43 /src/southbridge/intel/common
parentca64305152df777b6d53834c0d13b11636e9919a (diff)
downloadcoreboot-085ab5a3472689fcd6c7d0e4c4fee2d8b4cdb763.tar.xz
sb/intel: Move 'smbus.asl' to common place
Change-Id: Ia5b148c54224269bda98afe7c8a2c22c10a3bf56 Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr> Reviewed-on: https://review.coreboot.org/c/coreboot/+/36500 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: David Guckian Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
Diffstat (limited to 'src/southbridge/intel/common')
-rw-r--r--src/southbridge/intel/common/acpi/smbus.asl236
1 files changed, 236 insertions, 0 deletions
diff --git a/src/southbridge/intel/common/acpi/smbus.asl b/src/southbridge/intel/common/acpi/smbus.asl
new file mode 100644
index 0000000000..268298fb4c
--- /dev/null
+++ b/src/southbridge/intel/common/acpi/smbus.asl
@@ -0,0 +1,236 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2007-2009 coresystems GmbH
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; version 2 of
+ * the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+// Intel SMBus Controller 0:1f.3
+
+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
+}