1  # HP EliteBook Folio 9480m
  2  
  3  This page is about the notebook [HP EliteBook Folio 9480m].
  4  
  5  ## Release status
  6  
  7  HP EliteBook Folio 9480m was released in 2014 and is now end of life.
  8  It can be bought from a secondhand market like Taobao or eBay.
  9  
 10  ## Required proprietary blobs
 11  
 12  The following blobs are required to operate the hardware:
 13  
 14  1. EC firmware
 15  2. Intel ME firmware
 16  3. mrc.bin
 17  
 18  HP EliteBook Folio 9480m uses SMSC MEC1322 as its embedded controller.
 19  The EC firmware is stored in the flash chip, but we don't need to touch it
 20  or use it in the coreboot build process.
 21  
 22  Intel ME firmware is in the flash chip. It is not needed when building coreboot.
 23  
 24  The Haswell memory reference code binary is needed when building coreboot.
 25  Please see [mrc.bin](../../northbridge/intel/haswell/mrc.bin).
 26  
 27  ## Programming
 28  
 29  Before flashing, remove the battery and the hard drive cover according to the
 30  [Maintenance and Service Guide] of this laptop.
 31  
 32  ![Two flash chips of HP EliteBook Folio 9480m](folio_9480m_flash.webp)
 33  
 34  HP EliteBook Folio 9480m has two flash chips, a 16MiB system flash, and a 2MiB
 35  private flash. To install coreboot, we need to program both flash chips.
 36  Read [HP Sure Start] for detailed information.
 37  
 38  To access the system flash, we need to connect the AC adapter to the machine,
 39  then clip on the flash chip with an SOIC-8 clip. An [STM32-based flash programmer]
 40  made with an STM32 development board is tested to work.
 41  
 42  To access the private flash chip, we can use a ch341a based flash programmer and
 43  flash the chip with the AC adapter disconnected.
 44  
 45  Before flashing coreboot, we need to do the following:
 46  
 47  1. Erase the private flash to disable the IFD protection
 48  2. Modify the IFD to shrink the BIOS region, so that we'll not use or override
 49     the protected bootblock and PEI region, as well as the EC firmware
 50  
 51  To erase the private flash chip, attach it with the flash programmer via the SOIC-8 clip,
 52  then run:
 53  
 54      flashrom -p <programmer> --erase
 55  
 56  To modify the IFD, we need a new flash layout. The flash layout of the OEM firmware is:
 57  
 58      00000000:00000fff fd
 59      00001000:00002fff gbe
 60      00003000:005fffff me
 61      00600000:00ffffff bios
 62  
 63  The default coreboot configuration sets the flash chip size to 12MiB, so set the end of the
 64  BIOS region to 0xbfffff in the new layout. The modified IFD is as follows (Platform Data
 65  region pd is the region protected by HP Sure Start):
 66  
 67      00000000:00000fff fd
 68      00001000:00002fff gbe
 69      00003000:005fffff me
 70      00600000:00bfffff bios
 71      00eb5000:00ffffff pd
 72  
 73  Write the above layout in a file, and use ifdtool to modify the IFD of a flash image.
 74  Suppose the above layout file is ``layout.txt`` and the origin content of the system flash
 75  is in ``factory-sys.rom``, run:
 76  
 77      ifdtool -n layout.txt factory-sys.rom
 78  
 79  Then a flash image with a new IFD will be in ``factory-sys.rom.new``.
 80  
 81  Flash the IFD of the system flash:
 82  
 83      flashrom -p <programmer> --ifd -i fd -w factory-sys.rom.new
 84  
 85  Then flash the coreboot image:
 86  
 87      # first extend the 12M coreboot.rom to 16M
 88      fallocate -l 16M build/coreboot.rom
 89      flashrom -p <programmer> --ifd -i bios -w build/coreboot.rom
 90  
 91  After coreboot is installed, the coreboot firmware can be updated with internal flashing:
 92  
 93      flashrom -p internal --ifd -i bios --noverify-all -w build/coreboot.rom
 94  
 95  ## Debugging
 96  
 97  The board can be debugged with EHCI debug. The EHCI debug port is the USB port on the left.
 98  
 99  ## Test status
100  
101  ### Known issues
102  
103  - GRUB payload freezes just like previous EliteBook laptops
104  - Sometimes the PCIe WLAN module can not be found in the OS after booting to the system
105  - Sometimes all the USB devices can not be found in the OS after S3 resume
106  
107  ### Untested
108  
109  - Fingerprint reader
110  - Smart Card reader
111  
112  ### Working
113  
114  - i5-4310U CPU with 4G+4G memory
115  - SATA and M.2 SATA disk
116  - Ethernet
117  - WLAN
118  - WWAN
119  - SD card reader
120  - USB
121  - Keyboard and touchpad
122  - DisplayPort
123  - VGA
124  - Dock
125  - Audio output from speaker and headphone jack
126  - Webcam
127  - TPM
128  - EC ACPI
129  - S3 resume
130  - Arch Linux with Linux 5.8.9
131  - Memory initialization with mrc.bin version 1.6.1 Build 2
132  - Graphics initialization with libgfxinit
133  - Payload: SeaBIOS, edk2
134  - EC firmware
135    - KBC Revision 92.15 from OEM firmware version 01.33
136    - KBC Revision 92.17 from OEM firmware version 01.50
137  - Internal flashing under coreboot
138  
139  ## Technology
140  
141  ```{eval-rst}
142  +------------------+-----------------------------+
143  | CPU              | Intel Haswell-ULT           |
144  +------------------+-----------------------------+
145  | PCH              | Intel Lynx Point Low Power  |
146  +------------------+-----------------------------+
147  | EC               | SMSC MEC1322                |
148  +------------------+-----------------------------+
149  | Coprocessor      | Intel Management Engine     |
150  +------------------+-----------------------------+
151  ```
152  
153  [HP EliteBook Folio 9480m]: https://support.hp.com/us-en/product/hp-elitebook-folio-9480m-notebook-pc/7089926
154  [Maintenance and Service Guide]: http://h10032.www1.hp.com/ctg/Manual/c05228980
155  [STM32-based flash programmer]: https://github.com/dword1511/stm32-vserprog
156  [HP Sure Start]: hp_sure_start.md