driver/pc80/tpm: Runtime generate ACPI table for TPM driver
Runtime write acpi table for TPM driver. Change-Id: I70896e5874c24f17fca0c48b138ad4917b273f5b Signed-off-by: Naresh G Solanki <naresh.solanki@intel.com> Reviewed-on: https://review.coreboot.org/17425 Tested-by: build bot (Jenkins) Reviewed-by: Duncan Laurie <dlaurie@chromium.org>
This commit is contained in:
Naresh G Solanki
Martin Roth
parent
ab77cd4785
commit
80ff038b28
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@ -1,219 +0,0 @@
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/*
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* This file is part of the coreboot project.
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*
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* Copyright (C) 2014 Google Inc.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; version 2 of the License.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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/* Trusted Platform Module */
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#if CONFIG_LPC_TPM
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Device (TPM)
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{
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Name (_HID, EISAID ("PNP0C31"))
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Name (_CID, 0x310cd041)
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Name (_UID, 1)
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OperationRegion (TREG, SystemMemory,
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CONFIG_TPM_TIS_BASE_ADDRESS, 0x5000)
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Field (TREG, ByteAcc, NoLock, Preserve)
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{
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/* TPM_INT_ENABLE_0 */
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Offset (0x0008),
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, 3,
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ITPL, 2, /* Interrupt type and polarity */
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/* TPM_INT_VECTOR_0 */
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Offset (0x000C),
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IVEC, 4, /* SERIRQ vector */
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/* TPM_DID_VID */
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Offset (0x0f00),
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DVID, 32, /* Device and vendor ID */
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}
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Method (_STA, 0)
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{
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#if !CONFIG_TPM_DEACTIVATE
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If (LAnd (LGreater (DVID, 0), LLess (DVID, 0xffffffff))) {
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Return (0xf)
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} Else {
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/* TPM module missing */
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Return (0x0)
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}
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#else
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Return (0x0)
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#endif
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}
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Name (IBUF, ResourceTemplate ()
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{
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/* Updated based on TPM interrupt for Locality 0 */
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Interrupt (ResourceConsumer, Edge, ActiveHigh,
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Exclusive, , , TIRQ) { 0 }
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})
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Name (RBUF, ResourceTemplate ()
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{
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IO (Decode16, 0x2e, 0x2e, 0x01, 0x02)
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Memory32Fixed (ReadWrite, CONFIG_TPM_TIS_BASE_ADDRESS, 0x5000)
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})
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Method (_CRS, 0, Serialized)
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{
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CreateField (^IBUF, ^TIRQ._INT, 32, TVEC)
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CreateBitField (^IBUF, ^TIRQ._HE, TTYP)
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CreateBitField (^IBUF, ^TIRQ._LL, TPOL)
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CreateBitField (^IBUF, ^TIRQ._SHR, TSHR)
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If (LGreater (CONFIG_TPM_PIRQ, 0)) {
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/*
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* PIRQ: Update interrupt vector with configured PIRQ
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*/
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Store (CONFIG_TPM_PIRQ, TVEC)
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/* Active-Low Level-Triggered Shared */
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Store (One, TPOL)
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Store (Zero, TTYP)
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Store (One, TSHR)
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/* Merge IRQ with base address */
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Return (ConcatenateResTemplate (RBUF, IBUF))
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} ElseIf (LGreater (IVEC, 0)) {
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/*
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* SERIRQ: Update interrupt vector based on TPM register
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*/
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Store (IVEC, TVEC)
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If (LEqual (ITPL, 0x0)) {
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/* Active-High Level-Triggered Shared */
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Store (Zero, TPOL)
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Store (Zero, TTYP)
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Store (One, TSHR)
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} ElseIf (LEqual (ITPL, 0x1)) {
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/* Active-Low Level-Triggered Shared */
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Store (One, TPOL)
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Store (Zero, TTYP)
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Store (One, TSHR)
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} ElseIf (LEqual (ITPL, 0x2)) {
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/* Active-High Edge-Triggered Exclusive */
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Store (Zero, TPOL)
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Store (One, TTYP)
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Store (Zero, TSHR)
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} ElseIf (LEqual (ITPL, 0x3)) {
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/* Active-Low Edge-Triggered Exclusive */
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Store (One, TPOL)
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Store (One, TTYP)
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Store (Zero, TSHR)
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}
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/* Merge IRQ with base address */
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Return (ConcatenateResTemplate (RBUF, IBUF))
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} Else {
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Return (RBUF)
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}
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}
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/* Dummy _DSM to make Bitlocker work. */
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Method (_DSM, 4, Serialized)
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{
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/* Physical presence interface.
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This is used to submit commands like "Clear TPM" to
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be run at next reboot provided that user confirms them.
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Spec allows user to cancel all commands and/or
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configure BIOS to reject commands. So we pretend that
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user did just this: cancelled everything. If user
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really wants to clear TPM the only option now is to do it manually
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in payload.
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*/
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If (LEqual (Arg0, ToUUID ("3dddfaa6-361b-4eb4-a424-8d10089d1653")))
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{
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If (LEqual (Arg2, 0))
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{
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/* Functions 1-8. */
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Return (Buffer (2) { 0xFF, 0x01 })
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}
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/* Interface version: 1.2 */
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If (LEqual (Arg2, 1))
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{
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Return ("1.2")
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}
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/* Submit operations: drop on the floor and return success. */
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If (LEqual (Arg2, 2))
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{
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Return (0x00)
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}
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/* Pending operation: none. */
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If (LEqual (Arg2, 3))
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{
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Return (Package (2) { 0, 0 })
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}
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/* Pre-OS transition method: reboot. */
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If (LEqual (Arg2, 4))
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{
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Return (2)
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}
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/* Operation response: no operation executed. */
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If (LEqual (Arg2, 5))
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{
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Return (Package (3) { 0, 0, 0 })
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}
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/* Set preffered user language: deprecated and must return 3 aka "not implemented". */
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If (LEqual (Arg2, 6))
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{
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Return (3)
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}
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/* Submit operations: deny. */
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If (LEqual (Arg2, 7))
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{
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Return (3)
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}
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/* All actions are forbidden. */
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If (LEqual (Arg2, 8))
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{
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Return (1)
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}
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Return (1)
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}
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/* Memory clearing on boot: just a dummy. */
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If (LEqual (Arg0, ToUUID("376054ed-cc13-4675-901c-4756d7f2d45d")))
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{
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If (LEqual (Arg2, 0))
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{
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/* Function 1. */
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Return (Buffer (1) { 3 })
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}
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/* Just return success. */
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If (LEqual (Arg2, 1))
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{
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Return (0)
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}
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Return (1)
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}
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Return (Buffer (1) { 0 })
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}
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}
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#endif /* CONFIG_LPC_TPM */
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@ -27,6 +27,10 @@
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#include <string.h>
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#include <string.h>
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#include <delay.h>
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#include <delay.h>
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#include <arch/io.h>
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#include <arch/io.h>
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#include <arch/acpi.h>
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#include <arch/acpigen.h>
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#include <arch/acpi_device.h>
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#include <device/device.h>
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#include <console/console.h>
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#include <console/console.h>
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#include <tpm.h>
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#include <tpm.h>
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#include <arch/early_variables.h>
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#include <arch/early_variables.h>
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#include "chip.h"
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#include "chip.h"
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#define PREFIX "lpc_tpm: "
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#define PREFIX "lpc_tpm: "
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/* TCG Physical Presence Interface */
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#define TPM_PPI_UUID "3dddfaa6-361b-4eb4-a424-8d10089d1653"
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/* TCG Memory Clear Interface */
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#define TPM_MCI_UUID "376054ed-cc13-4675-901c-4756d7f2d45d"
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/* coreboot wrapper for TPM driver (start) */
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/* coreboot wrapper for TPM driver (start) */
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#define TPM_DEBUG(fmt, args...) \
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#define TPM_DEBUG(fmt, args...) \
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if (IS_ENABLED(CONFIG_DEBUG_TPM)) { \
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if (IS_ENABLED(CONFIG_DEBUG_TPM)) { \
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@ -211,6 +218,13 @@ static inline void tpm_write_int_vector(int vector, int locality)
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write8(TIS_REG(locality, TIS_REG_INT_VECTOR), vector & 0xf);
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write8(TIS_REG(locality, TIS_REG_INT_VECTOR), vector & 0xf);
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}
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}
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static inline u8 tpm_read_int_vector(int locality)
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{
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u8 value = read8(TIS_REG(locality, TIS_REG_INT_VECTOR));
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TPM_DEBUG_IO_READ(TIS_REG_INT_VECTOR, value);
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return value;
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}
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static inline void tpm_write_int_polarity(int polarity, int locality)
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static inline void tpm_write_int_polarity(int polarity, int locality)
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{
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{
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/* Set polarity and leave all other bits at 0 */
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/* Set polarity and leave all other bits at 0 */
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@ -219,6 +233,15 @@ static inline void tpm_write_int_polarity(int polarity, int locality)
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write32(TIS_REG(locality, TIS_REG_INT_ENABLE), value);
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write32(TIS_REG(locality, TIS_REG_INT_ENABLE), value);
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}
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}
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static inline u32 tpm_read_int_polarity(int locality)
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{
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/* Get polarity and leave all other bits */
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u32 value = read8(TIS_REG(locality, TIS_REG_INT_ENABLE));
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value = (value >> 3) & 0x3;
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TPM_DEBUG_IO_READ(TIS_REG_INT_ENABLE, value);
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return value;
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}
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/*
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/*
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* tis_wait_sts()
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* tis_wait_sts()
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*
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*
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@ -750,9 +773,232 @@ static void lpc_tpm_set_resources(struct device *dev)
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}
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}
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}
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}
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#if IS_ENABLED(CONFIG_HAVE_ACPI_TABLES)
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static void tpm_ppi_func0_cb(void *arg)
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{
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/* Functions 1-8. */
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u8 buf[] = {0xff, 0x01};
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acpigen_write_return_byte_buffer(buf, 2);
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}
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static void tpm_ppi_func1_cb(void *arg)
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{
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if (IS_ENABLED(CONFIG_TPM2))
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/* Interface version: 2.0 */
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acpigen_write_return_string("2.0");
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else
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/* Interface version: 1.2 */
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acpigen_write_return_string("1.2");
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}
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static void tpm_ppi_func2_cb(void *arg)
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{
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/* Submit operations: drop on the floor and return success. */
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acpigen_write_return_byte(0);
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}
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static void tpm_ppi_func3_cb(void *arg)
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{
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/* Pending operation: none. */
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acpigen_emit_byte(RETURN_OP);
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acpigen_write_package(2);
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acpigen_write_byte(0);
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acpigen_write_byte(0);
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acpigen_pop_len();
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}
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static void tpm_ppi_func4_cb(void *arg)
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{
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/* Pre-OS transition method: reboot. */
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acpigen_write_return_byte(2);
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}
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static void tpm_ppi_func5_cb(void *arg)
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{
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/* Operation response: no operation executed. */
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acpigen_emit_byte(RETURN_OP);
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acpigen_write_package(3);
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acpigen_write_byte(0);
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acpigen_write_byte(0);
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acpigen_write_byte(0);
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acpigen_pop_len();
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}
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static void tpm_ppi_func6_cb(void *arg)
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{
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/*
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* Set preferred user language: deprecated and must return 3 aka
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* "not implemented".
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*/
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acpigen_write_return_byte(3);
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}
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static void tpm_ppi_func7_cb(void *arg)
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{
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/* Submit operations: deny. */
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acpigen_write_return_byte(3);
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}
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static void tpm_ppi_func8_cb(void *arg)
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{
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/* All actions are forbidden. */
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acpigen_write_return_byte(1);
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}
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static void (*tpm_ppi_callbacks[])(void *) = {
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tpm_ppi_func0_cb,
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tpm_ppi_func1_cb,
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tpm_ppi_func2_cb,
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tpm_ppi_func3_cb,
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tpm_ppi_func4_cb,
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tpm_ppi_func5_cb,
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tpm_ppi_func6_cb,
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tpm_ppi_func7_cb,
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tpm_ppi_func8_cb,
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};
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static void tpm_mci_func0_cb(void *arg)
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{
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/* Function 1. */
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acpigen_write_return_singleton_buffer(0x3);
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}
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static void tpm_mci_func1_cb(void *arg)
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{
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/* Just return success. */
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acpigen_write_return_byte(0);
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}
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static void (*tpm_mci_callbacks[])(void *) = {
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tpm_mci_func0_cb,
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tpm_mci_func1_cb,
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};
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static void lpc_tpm_fill_ssdt(struct device *dev)
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{
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const char *path = acpi_device_path(dev->bus->dev);
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u32 arg;
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struct opregion opreg = OPREGION("TREG", SYSTEMMEMORY,
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CONFIG_TPM_TIS_BASE_ADDRESS, 0x5000);
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if (!path)
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return;
|
||||||
|
|
||||||
|
/* Device */
|
||||||
|
acpigen_write_scope(path);
|
||||||
|
acpigen_write_device(acpi_device_name(dev));
|
||||||
|
|
||||||
|
acpigen_write_name("_HID");
|
||||||
|
acpigen_emit_eisaid("PNP0C31");
|
||||||
|
|
||||||
|
acpigen_write_name("_CID");
|
||||||
|
acpigen_emit_eisaid("PNP0C31");
|
||||||
|
|
||||||
|
acpigen_write_name_integer("_UID", 1);
|
||||||
|
|
||||||
|
acpigen_write_opregion(&opreg);
|
||||||
|
|
||||||
|
struct fieldlist tpm_field_list[] = {
|
||||||
|
/*
|
||||||
|
* TPM_INT_ENABLE_0
|
||||||
|
* bit 0 : dataAvailIntEnable,
|
||||||
|
* bit 1 : stsValidIntEnable,
|
||||||
|
* bit 2 : localityChangeIntEnable,
|
||||||
|
* bit 3:4 typePolarity.
|
||||||
|
*/
|
||||||
|
FIELDLIST_OFFSET(0x8),
|
||||||
|
FIELDLIST_NAMESTR("INTE", 3),
|
||||||
|
FIELDLIST_NAMESTR("ITPL", 2),
|
||||||
|
|
||||||
|
/* TPM_INT_VECTOR_0 */
|
||||||
|
FIELDLIST_OFFSET(0xC),
|
||||||
|
FIELDLIST_NAMESTR("IVEC", 4),
|
||||||
|
|
||||||
|
/* TPM_DID_VID */
|
||||||
|
FIELDLIST_OFFSET(0xf00),
|
||||||
|
FIELDLIST_NAMESTR("DVID", 32),
|
||||||
|
};
|
||||||
|
|
||||||
|
acpigen_write_field(opreg.name, tpm_field_list,
|
||||||
|
ARRAY_SIZE(tpm_field_list),
|
||||||
|
FIELD_BYTEACC | FIELD_NOLOCK | FIELD_PRESERVE);
|
||||||
|
|
||||||
|
u32 did_vid = tpm_read_did_vid(0);
|
||||||
|
if (did_vid > 0 && did_vid < 0xffffffff)
|
||||||
|
acpigen_write_STA(ACPI_STATUS_DEVICE_ALL_ON);
|
||||||
|
else
|
||||||
|
acpigen_write_STA(ACPI_STATUS_DEVICE_ALL_OFF);
|
||||||
|
|
||||||
|
/* Resources */
|
||||||
|
acpigen_write_name("_CRS");
|
||||||
|
acpigen_write_resourcetemplate_header();
|
||||||
|
acpigen_write_mem32fixed(1, CONFIG_TPM_TIS_BASE_ADDRESS, 0x5000);
|
||||||
|
acpigen_write_io16(0x2e, 0x2e, 1, 2, 1);
|
||||||
|
|
||||||
|
if (CONFIG_TPM_PIRQ) {
|
||||||
|
/*
|
||||||
|
* PIRQ: Update interrupt vector with configured PIRQ
|
||||||
|
* Active-Low Level-Triggered Shared
|
||||||
|
*/
|
||||||
|
struct acpi_irq tpm_irq_a = IRQ_LEVEL_LOW(CONFIG_TPM_PIRQ);
|
||||||
|
acpi_device_write_interrupt(&tpm_irq_a);
|
||||||
|
} else if (tpm_read_int_vector(0) > 0) {
|
||||||
|
u8 int_vec = tpm_read_int_vector(0);
|
||||||
|
u8 int_pol = tpm_read_int_polarity(0);
|
||||||
|
struct acpi_irq tpm_irq = IRQ_LEVEL_LOW(int_vec);
|
||||||
|
|
||||||
|
if (int_pol & 1)
|
||||||
|
tpm_irq.polarity = IRQ_ACTIVE_LOW;
|
||||||
|
else
|
||||||
|
tpm_irq.polarity = IRQ_ACTIVE_HIGH;
|
||||||
|
|
||||||
|
if (int_pol & 2)
|
||||||
|
tpm_irq.mode = IRQ_EDGE_TRIGGERED;
|
||||||
|
else
|
||||||
|
tpm_irq.mode = IRQ_LEVEL_TRIGGERED;
|
||||||
|
|
||||||
|
acpi_device_write_interrupt(&tpm_irq);
|
||||||
|
}
|
||||||
|
|
||||||
|
acpigen_write_resourcetemplate_footer();
|
||||||
|
|
||||||
|
if (!IS_ENABLED(CONFIG_CHROMEOS)) {
|
||||||
|
/*
|
||||||
|
* _DSM method
|
||||||
|
*/
|
||||||
|
struct dsm_uuid ids[] = {
|
||||||
|
/* Physical presence interface.
|
||||||
|
* This is used to submit commands like "Clear TPM" to
|
||||||
|
* be run at next reboot provided that user confirms
|
||||||
|
* them. Spec allows user to cancel all commands and/or
|
||||||
|
* configure BIOS to reject commands. So we pretend that
|
||||||
|
* user did just this: cancelled everything. If user
|
||||||
|
* really wants to clear TPM the only option now is to
|
||||||
|
* do it manually in payload.
|
||||||
|
*/
|
||||||
|
DSM_UUID(TPM_PPI_UUID, &tpm_ppi_callbacks[0],
|
||||||
|
ARRAY_SIZE(tpm_ppi_callbacks), (void *) &arg),
|
||||||
|
/* Memory clearing on boot: just a dummy. */
|
||||||
|
DSM_UUID(TPM_MCI_UUID, &tpm_mci_callbacks[0],
|
||||||
|
ARRAY_SIZE(tpm_mci_callbacks), (void *) &arg),
|
||||||
|
};
|
||||||
|
|
||||||
|
acpigen_write_dsm_uuid_arr(ids, ARRAY_SIZE(ids));
|
||||||
|
}
|
||||||
|
acpigen_pop_len(); /* Device */
|
||||||
|
acpigen_pop_len(); /* Scope */
|
||||||
|
|
||||||
|
printk(BIOS_INFO, "%s.%s: %s %s\n", path, acpi_device_name(dev),
|
||||||
|
dev->chip_ops->name, dev_path(dev));
|
||||||
|
}
|
||||||
|
|
||||||
|
static const char *lpc_tpm_acpi_name(struct device *dev)
|
||||||
|
{
|
||||||
|
return "TPM";
|
||||||
|
}
|
||||||
|
#endif
|
||||||
|
|
||||||
static struct device_operations lpc_tpm_ops = {
|
static struct device_operations lpc_tpm_ops = {
|
||||||
.read_resources = &lpc_tpm_read_resources,
|
.read_resources = &lpc_tpm_read_resources,
|
||||||
.set_resources = &lpc_tpm_set_resources,
|
.set_resources = &lpc_tpm_set_resources,
|
||||||
|
#if IS_ENABLED(CONFIG_HAVE_ACPI_TABLES)
|
||||||
|
.acpi_name = &lpc_tpm_acpi_name,
|
||||||
|
.acpi_fill_ssdt_generator = &lpc_tpm_fill_ssdt,
|
||||||
|
#endif
|
||||||
};
|
};
|
||||||
|
|
||||||
static struct pnp_info pnp_dev_info[] = {
|
static struct pnp_info pnp_dev_info[] = {
|
||||||
|
|
|
||||||
Loading…
Reference in New Issue