[U-Boot] Armada 38x clearfog pci trouble

[Влад Мао]

Hello. I have a clearfog base board with PCI-E video card based on
SIlicon Motion s750 (InnoDisk EMPV-1201), and i have trouble with
u-boot and accessing to this card.

I use last u-boot from git, and when i try to read memory from Base
address 0 of PCI-E, board resetted. log from board:

High speed PHY - Version: 2.0
Detected Device ID 6828
board SerDes lanes topology details:
 | Lane #  | Speed |  Type       |
 --------------------------------
 |   0    |  3   |  SATA0       |
 |   1    |  0   |  SGMII1      |
 |   2    |  5   |  PCIe1       |
 |   3    |  5   |  USB3 HOST1  |
 |   4    |  5   |  PCIe2       |
 |   5    |  0   |  SGMII2      |
 --------------------------------
:** Link is Gen1, check the EP capability
PCIe, Idx 1: remains Gen1
PCIe, Idx 2: detected no link
High speed PHY - Ended Successfully
DDR3 Training Sequence - Ver TIP-1.29.0
DDR3 Training Sequence - Switching XBAR Window to FastPath Window
DDR3 Training Sequence - Ended Successfully
Trying to boot from MMC1


U-Boot 2017.09-00255-ge884656c2c-dirty (Sep 22 2017 - 09:05:09 +0300)

SoC:   MV88F6828-A0 at 1600 MHz
I2C:   ready
DRAM:  1 GiB (800 MHz, ECC not enabled)
MMC:   mv_sdh: 0
PCI:
  00:01.0     - 126f:0750 - Display controller
Model: SolidRun Clearfog A1
Board: SolidRun ClearFog
Net:   eth2: ethernet at 30000, eth3: ethernet at 34000, eth1: ethernet at 70000
Hit any key to stop autoboot:  0
=> pci
Scanning PCI devices on bus 0
BusDevFun  VendorId   DeviceId   Device Class       Sub-Class
_____________________________________________________________
00.01.00   0x126f     0x0750     Display controller      0x00
=> pci header 00.01.00
  vendor ID =                   0x126f
  device ID =                   0x0750
  command register ID =         0x0007
  status register =             0x0010
  revision ID =                 0xa1
  class code =                  0x03 (Display controller)
  sub class code =              0x00
  programming interface =       0x00
  cache line =                  0x08
  latency time =                0x00
  header type =                 0x00
  BIST =                        0x00
  base address 0 =              0xfc000008
  base address 1 =              0xe8000000
  base address 2 =              0x00000000
  base address 3 =              0x00000000
  base address 4 =              0x00000000
  base address 5 =              0x00000000
  cardBus CIS pointer =         0x00000000
  sub system vendor ID =        0x126f
  sub system ID =               0x0750
  expansion ROM base address =  0xe8200000
  interrupt line =              0xff
  interrupt pin =               0x01
  min Grant =                   0x00
  max Latency =                 0x00
=> md.l 0xe8000000 10
e8000000: 20a00000 01000060 01f00000 01765324    ... `.......$Sv.
e8000010: 01765324 00000000 00000000 00000000    $Sv.............
e8000020: 00000008 00000000 00000000 00000000    ................
e8000030: 00000000 00000000 00000000 00000000    ................
=> md.l 0xfc000008 10
fc000008:data abort
pc : [<3ffb8104>]          lr : [<3ffb80e0>]
reloc pc : [<0083a104>]    lr : [<0083a0e0>]
sp : 3fb68950  ip : 00000002     fp : fc000008
r10: fc000008  r9 : 3fb6ded8     r8 : 00000004
r7 : 00000000  r6 : 00000004     r5 : 00000004  r4 : 00000010
r3 : fc000008  r2 : 0000003a     r1 : 3fb68964  r0 : 00000009
Flags: nZCv  IRQs off  FIQs off  Mode SVC_32
Resetting CPU ...

resetting ...
:05:09)
High speed PHY - Version: 2.0
Detected Device ID 6828
board SerDes lanes topology details:
 | Lane #  | Speed |  Type       |
 --------------------------------
 |   0    |  3   |  SATA0       |
 |   1    |  0   |  SGMII1      |
 |   2    |  5   |  PCIe1       |
 |   3    |  5   |  USB3 HOST1  |
 |   4    |  5   |  PCIe2       |
 |   5    |  0   |  SGMII2      |
 --------------------------------
:** Link is Gen1, check the EP capability
PCIe, Idx 1: remains Gen1
PCIe, Idx 2: detected no link
High speed PHY - Ended Successfully
DDR3 Training Sequence - Ver TIP-1.29.0
DDR3 Training Sequence - Switching XBAR Window to FastPath Window
DDR3 Training Sequence - Ended Successfully
Trying to boot from MMC1


U-Boot 2017.09-00255-ge884656c2c-dirty (Sep 22 2017 - 09:05:09 +0300)

SoC:   MV88F6828-A0 at 1600 MHz
I2C:   ready
DRAM:  1 GiB (800 MHz, ECC not enabled)
MMC:   mv_sdh: 0
PCI:
  00:01.0     - 126f:0750 - Display controller
Model: SolidRun Clearfog A1
Board: SolidRun ClearFog
Net:   eth2: ethernet at 30000, eth3: ethernet at 34000, eth1: ethernet at 70000
Hit any key to stop autoboot:  0
=>

As you can see, memory from base address 1 readed sucessfully. What is
the problem and how i can fix this? Feel free to ask logs or something
other, i grant it for you