> For the complete documentation index, see [llms.txt](https://open-rt.gitbook.io/open-surfacert/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://open-rt.gitbook.io/open-surfacert/surface-rt/uefi/acpi-tables/acpi-ssdt.md). # SSDT Extends DSDT. Surface RT has 2 SSDT tables. SSDT0000.bin contains the hardware description (very interesting)\ SSDT0001.bin contains only TPM stuff. (uninteresting at the moment) ## Decompile SSDT0000.bin Most of the ACPI tables can be decompiled by iASL (Intel ASL compiler).\ But SSDT0000.bin can **not** be decompiled by iASL.\ We have to use MS-ASL compiler. (MS ASL is not as strict as iASL which leads to issues with Linux)\ \ use `asl.exe /u /e /ResDecode SSDT0000.bin`\ Decompiled output below: {% file src="/files/-MMUxhJi3sfKjLttf7nN" %} ## Compile SSDT0000.ASL There is a way to compile the SSDT0000.ASL with iasl, without getting a lot of errors about external symbols. Just put the file next to the other acpi tables (don't decompile them), and it shouldn't give errors about missing external symbols. There are 4 syntax errors, currently there are no fixes available. ## What SSDT0000.ASL can tell you WorkInProgress ### I2C Devices Search for `I2CSerialBus` should reveal all i2c devices. #### I2C1 (HID Stuff) 1. I2C1 0x00 - tCover 2. I2C1 0x28 - SEN1 / SNMU 3. I2C1 0x50 - GFXC?? #### I2C2 - Daughterboard 1. I2C2 0x0C - SARA 2. I2C2 0x2D - TEV2 - cypress 3. I2C2 0x39 - TIC2 4. I2C2 0x5B - TOUA -atmel #### I2C3 1. I2C3 0x10 - GFXC 2. I2C3 0x72 - GFXC #### I2C4 - HDMI 1. I2C4 0x30 - GFXC - EDID 2. I2C4 0x3A - GFXC - EDID 3. I2C4 0x3B - GFXC - EDID 4. I2C4 0x50 - GFXC - EDID #### I2C5 -Mainboard 1. I2C5 0x0A - TRO1 - battery? 2. I2C5 0x0C - SARA / TIC1 3. I2C5 0x1A - AUDI - wolfson 4. I2C5 0x2D - Power resource / PMUD / TR3\_(RTC) - PMIC 5. I2C5 0x4C - THEM / TI2C 6. I2C5 0x60 - PMUD - PMIC2 ### GPIOs ``` PB2: (Exclusive, PullDefault, 0, 0, IoRestrictionNoneAndPreserve, "\\_SB.GPIO", 0, ResourceConsumer, , ) PD1: (Exclusive, PullDefault, 0, 0, IoRestrictionOutputOnly, "\\_SB.GPIO", 0, ResourceConsumer, , ) PD7: (Exclusive, PullDefault, 0, 0, IoRestrictionNone, "\\_SB.GPIO", 0, ResourceConsumer, , ) PDD0: (Exclusive, PullDefault, 0, 0, IoRestrictionNoneAndPreserve, "\\_SB.GPIO", 0, ResourceConsumer, , ) PDD2: (Exclusive, PullDefault, 0, 0, IoRestrictionNoneAndPreserve, "\\_SB.GPIO", 0, ResourceConsumer, , ) PDD7: (Exclusive, PullDefault, 0, 0, IoRestrictionNone, "\\_SB.GPIO", 0, ResourceConsumer, , ) PH0: (Shared, PullDefault, 0, 0, IoRestrictionNoneAndPreserve, "\\_SB.GPIO", 0, ResourceConsumer, , ) PH6: (Exclusive, PullDefault, 0, 0, IoRestrictionNone, "\\_SB.GPIO", 0, ResourceConsumer, , ) PI5: (Shared, PullDefault, 0, 0, IoRestrictionNone, "\\_SB.GPIO", 0, ResourceConsumer, , ) PL1: (Shared, PullDefault, 0, 0, IoRestrictionNone, "\\_SB.GPIO", 0, ResourceConsumer, , ) PN0: (Exclusive, PullDefault, 0, 0, IoRestrictionNone, "\\_SB.GPIO", 0, ResourceConsumer, , ) PN3: (Exclusive, PullDefault, 0, 0, IoRestrictionNone, "\\_SB.GPIO", 0, ResourceConsumer, , ) PN7: (Shared, PullDefault, 0, 0, IoRestrictionNoneAndPreserve, "\\_SB.GPIO", 0, ResourceConsumer, , ) PR4: (Exclusive, PullDefault, 0, 0, IoRestrictionNone, "\\_SB.GPIO", 0, ResourceConsumer, , ) PR6: (Shared, PullDefault, 0, 0, IoRestrictionNone, "\\_SB.GPIO", 0, ResourceConsumer, , ) PR6: (Shared, PullDefault, 0, 0, IoRestrictionNoneAndPreserve, "\\_SB.GPIO", 0, ResourceConsumer, , ) PR7: (Shared, PullDefault, 0, 0, IoRestrictionNone, "\\_SB.GPIO", 0, ResourceConsumer, , ) PR7: (Shared, PullDefault, 0, 0, IoRestrictionNoneAndPreserve, "\\_SB.GPIO", 0, ResourceConsumer, , ) PS0: (Shared, PullDefault, 0, 0, IoRestrictionNone, "\\_SB.GPIO", 0, ResourceConsumer, , ) PS1: (Exclusive, PullDefault, 0, 0, IoRestrictionNone, "\\_SB.GPIO", 0, ResourceConsumer, , ) PS3: (Exclusive, PullDefault, 0, 0, IoRestrictionOutputOnly, "\\_SB.GPIO", 0, ResourceConsumer, , ) PS5: (Shared, PullDefault, 0, 0, IoRestrictionNone, "\\_SB.GPIO", 0, ResourceConsumer, , ) PS5: (Shared, PullDefault, 0, 0, IoRestrictionNone, "\\_SB.GPIO", 0, ResourceConsumer, , ) PS6: (Shared, PullDefault, 0, 0, IoRestrictionNone, "\\_SB.GPIO", 0, ResourceConsumer, , ) PS6: (Shared, PullDefault, 0, 0, IoRestrictionNone, "\\_SB.GPIO", 0, ResourceConsumer, , ) PS7: (Shared, PullDefault, 0, 0, IoRestrictionNone, "\\_SB.GPIO", 0, ResourceConsumer, , ) PS7: (Shared, PullDefault, 0, 0, IoRestrictionNone, "\\_SB.GPIO", 0, ResourceConsumer, , ) PT3: (Exclusive, PullDefault, 0, 0, IoRestrictionNone, "\\_SB.GPIO", 0, ResourceConsumer, , ) PV0: (Shared, PullDefault, 0, 0, IoRestrictionNone, "\\_SB.GPIO", 0, ResourceConsumer, , ) PV0: (Shared, PullDefault, 0, 0, IoRestrictionNone, "\\_SB.GPIO", 0, ResourceConsumer, , ) PW2: (Shared, PullUp, 0, 0, IoRestrictionNone, "\\_SB.GPIO", 0, ResourceConsumer, , ) PW3: (Shared, PullUp, 0, 0, IoRestrictionNone, "\\_SB.GPIO", 0, ResourceConsumer, , ) PBB0: (Exclusive, PullDefault, 0, 0, IoRestrictionNone, "\\_SB.GPIO", 0, ResourceConsumer, , ) PBB4: (Exclusive, PullDefault, 0, 0, IoRestrictionNone, "\\_SB.GPIO", 0, ResourceConsumer, , ) PBB7: (Exclusive, PullDefault, 0, 0, IoRestrictionNone, "\\_SB.GPIO", 0, ResourceConsumer, , ) PCC7: (Exclusive, PullDefault, 0, 0, IoRestrictionNone, "\\_SB.GPIO", 0, ResourceConsumer, , ) ``` ### Interrupts ``` PI5: (Edge, ActiveBoth, SharedAndWake, PullDefault, 0x1388, "\\_SB.GPIO", 0, ResourceConsumer, , ) PJ0: (Edge, ActiveHigh, SharedAndWake, PullDefault, 0, "\\_SB.GPIO", 0, ResourceConsumer, , ) PJ0: (Edge, ActiveHigh, SharedAndWake, PullDefault, 0, "\\_SB.GPIO", 0, ResourceConsumer, , ) PK2: (Level, ActiveLow, Shared, PullDefault, 0, "\\_SB.GPIO", 0, ResourceConsumer, , ) PL1: (Edge, ActiveBoth, SharedAndWake, PullDefault, 0, "\\_SB.GPIO", 0, ResourceConsumer, , ) PN2: (Level, ActiveLow, Shared, PullDefault, 0, "\\_SB.GPIO", 0, ResourceConsumer, , ) PN7: (Edge, ActiveBoth, Shared, PullDefault, 0, "\\_SB.GPIO", 0, ResourceConsumer, , ) PN7: (Edge, ActiveBoth, Shared, PullDefault, 0, "\\_SB.GPIO", 0, ResourceConsumer, , ) PS0: (Edge, ActiveBoth, SharedAndWake, PullDefault, 0, "\\_SB.GPIO", 0, ResourceConsumer, , ) PS0: (Edge, ActiveBoth, SharedAndWake, PullDefault, 0, "\\_SB.GPIO", 0, ResourceConsumer, , ) PS5: (Edge, ActiveBoth, SharedAndWake, PullDefault, 0, "\\_SB.GPIO", 0, ResourceConsumer, , ) PS5: (Edge, ActiveBoth, SharedAndWake, PullDefault, 0, "\\_SB.GPIO", 0, ResourceConsumer, , ) PS6: (Edge, ActiveBoth, Shared, PullUp, 0x9c4, "\\_SB.GPIO", 0, ResourceConsumer, , ) PS6: (Edge, ActiveBoth, Shared, PullUp, 0x9c4, "\\_SB.GPIO", 0, ResourceConsumer, , ) PS7: (Edge, ActiveBoth, Shared, PullUp, 0x9c4, "\\_SB.GPIO", 0, ResourceConsumer, , ) PS7: (Edge, ActiveBoth, Shared, PullUp, 0x9c4, "\\_SB.GPIO", 0, ResourceConsumer, , ) PU5: (Level, ActiveHigh, SharedAndWake, PullDown, 0, "\\_SB.GPIO", 0, ResourceConsumer, , ) PU6: (Edge, ActiveLow, ExclusiveAndWake, PullDefault, 0, "\\_SB.GPIO", 0, ResourceConsumer, , ) PV0: (Edge, ActiveHigh, SharedAndWake, PullDefault, 0x9c4, "\\_SB.GPIO", 0, ResourceConsumer, , ) PV0: (Edge, ActiveHigh, SharedAndWake, PullDefault, 0x9c4, "\\_SB.GPIO", 0, ResourceConsumer, , ) PW2: (Edge, ActiveBoth, SharedAndWake, PullUp, 0, "\\_SB.GPIO", 0, ResourceConsumer, , ) PW3: (Edge, ActiveBoth, Shared, PullUp, 0, "\\_SB.GPIO", 0, ResourceConsumer, , ) PBB6: (Level, ActiveLow, Shared, PullDefault, 0, "\\_SB.GPIO", 0, ResourceConsumer, , ) PDD3: (Edge, ActiveBoth, SharedAndWake, PullDefault, 0, "\\_SB.GPIO", 0, ResourceConsumer, , ) PDD3: (Level, ActiveLow, ExclusiveAndWake, PullDefault, 0, "\\_SB.GPIO", 0, ResourceConsumer, , ) ``` ### Power Resources * PRS1 * PD7 - ESD1 * PRCN - PMIC(I2C5) * LDO5 - SD Regulator 1V8-3V3 * PRMU * PD7 - ESD1 * PRTU * PD1- ESD1 * PD2 - ESD2 * PRI5 * PRTC GFXC:\ PR6 LDO1\ PR7 LDO2\ PBB4 E1V8