diff options
Diffstat (limited to 'src/vendorcode')
| -rw-r--r-- | src/vendorcode/google/chromeos/acpi/vpd.asl | 212 |
1 files changed, 0 insertions, 212 deletions
diff --git a/src/vendorcode/google/chromeos/acpi/vpd.asl b/src/vendorcode/google/chromeos/acpi/vpd.asl deleted file mode 100644 index a1ea3386ba..0000000000 --- a/src/vendorcode/google/chromeos/acpi/vpd.asl +++ /dev/null @@ -1,212 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0-only */ - -/* - * This device provides an ACPI interface to read VPD keys from either - * the RO_VPD or RW_VPD region. For example: - * - * VPD.VPDF ("RO", "ro_key_name") - * VPD.VPDF ("RW", "rw_key_name") - */ - -Device (VPD) -{ - Name (_HID, "GOOG000F") - Name (_UID, 1) - Name (_STA, 0xf) - - Name (VOFS, 0x600) /* Start of VPD header in VPD region */ - Name (VIHL, 0x10) /* Length of VPD info header */ - Name (VPET, 0x00) /* VPD Entry Type: Terminator */ - Name (VPES, 0x01) /* VPD Entry Type: String */ - Name (VPEI, 0xfe) /* VPD Entry Type: Info (header) */ - Name (MORE, 0x80) /* Bit to indicate more length bytes */ - - Name (VPTR, Zero) /* Pointer to current byte in VPD for parser */ - Name (VEND, Zero) /* End of VPD region */ - - /* - * VLOC() - Return location and length of VPD region in memory. - * These values must be initialized in GNVS by coreboot. - * - * Returns: Package indicating start and length of region: - * [0] = Address of the start of VPD region. - * [1] = Length of the VPD region. - */ - Method (VLOC, 1, Serialized) - { - Switch (ToString (Arg0)) - { - Case ("RO") { - Return (Package () { \ROVP, \ROVL }) - } - Case ("RW") { - Return (Package () { \RWVP, \RWVL }) - } - Default { - Return (Package () { Zero, Zero }) - } - } - } - - /* - * VVPD() - Verify VPD info header. - * Arg0: VPD partition base address. - * Returns: VPD length or Zero if VPD header is not valid. - */ - Method (VVPD, 1, Serialized) - { - Local0 = Arg0 + ^VOFS - - OperationRegion (VPDH, SystemMemory, Local0, ^VIHL) - Field (VPDH, DWordAcc, NoLock, Preserve) - { - TYPE, 8, /* VPD Header Tag (=0xfe) */ - KLEN, 8, /* Key length (=9) */ - IVER, 8, /* Info version (=1) */ - SIGN, 64, /* Signature (="gVpdInfo") */ - VLEN, 8, /* Value length (=4) */ - SIZE, 32, /* VPD length */ - } - - If (TYPE != ^VPEI) { - Return (Zero) - } - If (KLEN != 9) { - Return (Zero) - } - If (IVER != 1) { - Return (Zero) - } - If (ToString (SIGN) != "gVpdInfo") { - Return (Zero) - } - If (VLEN != 4) { - Return (Zero) - } - - Return (SIZE) - } - - /* Return next byte from VPD at pointer VPTR, and increment VPTR. */ - Method (VPRB, 0, Serialized) - { - If (^VPTR > ^VEND) { - Printf ("Access beyond end of VPD region") - Return (Zero) - } - - Local0 = ^VPTR - OperationRegion (VPDR, SystemMemory, Local0, One) - Field (VPDR, DWordAcc, NoLock, Preserve) - { - BYTE, 8, - } - - /* Increment address pointer */ - ^VPTR++ - Return (BYTE) - } - - /* Extract and return next string from VPD. */ - Method (VPDE, 0, Serialized) - { - Local0 = One /* Indicates if there are more bytes */ - Local1 = Zero /* Length */ - - /* Decode the string length */ - While (Local0) { - /* Read the next byte at indicated address */ - Local2 = ^VPRB () - - /* Update the more bit from the byte in Local2 */ - Local0 = Local2 >> 7 - - /* Save the length bits from Local2 */ - Local1 <<= 7 - Local1 |= Local2 & 0x7f - } - If (Local1 == Zero) { - Return (Zero) - } - - /* Extract the string */ - Local3 = Zero - Local4 = "" - While (Local3 < Local1) { - Concatenate (Local4, ToString (^VPRB ()), Local4) - Local3++ - } - - Return (Local4) - } - - /* - * VPDS() - Find next VPD key and value. - * Returns: Package containing key and value: - * [0] = VPD key string - * [1] = VPD value string - */ - Method (VPDS, 0, Serialized) - { - Name (VPKV, Package () { "", "" }) - - /* Read the VPD type and ensure it is a string */ - If (^VPRB () != ^VPES) { - Printf ("VPDS: Type is not a string") - Return (VPKV) - } - - /* Extract the key string and value */ - VPKV[0] = VPDE () - VPKV[1] = VPDE () - - Return (VPKV) - } - - /* - * VPDF() - Find VPD key with matching name. - * Arg0: VPD Partition, either "RO" or "RW". - * Arg1: VPD key name to search for. - * Returns: VPD string corresponding to VPD key, or Zero if not found. - */ - Method (VPDF, 2, Serialized) - { - Local0 = VLOC (Arg0) - - /* Start of VPD region */ - ^VPTR = DerefOf (Local0[0]) - - /* End address of VPD region */ - ^VEND = ^VPTR + DerefOf (Local0[1]) - - If (^VPTR == Zero || ^VEND == Zero) { - Printf ("Unable to find VPD region") - Return (Zero) - } - - /* Verify VPD info header and save size */ - Local0 = VVPD (^VPTR) - If (Local0 == Zero) { - Printf ("VPD region %o did not verify", Arg0) - Return (Zero) - } - - /* Set VPD pointer to start of VPD entries */ - ^VPTR += ^VOFS + ^VIHL - - /* Search through VPD entries until key is found */ - Local1 = "" - While (Local1 != ToString (Arg1)) { - Local2 = VPDS () - Local1 = DerefOf (Local2[0]) - If (Local1 == "") { - Printf ("VPD KEY %o not found", Arg1) - Return (Zero) - } - } - Local3 = DerefOf (Local2[1]) - - Printf ("Found VPD KEY %o = %o", Local1, Local3) - Return (Local3) - } -} |