Hi Community,
I have an issue trying to get PCIe working on a Sabresd board. Kernel version is 3.19.0, u-boot version is 2015.01.
U-boot output:
switch to partitions #0, OK
mmc1 is current device
SD/MMC found on device 1
Checking for: /uEnv.txt ...
Checking for: /boot/uEnv.txt ...
55 bytes read in 130 ms (0 Bytes/s)
Loaded environment from /boot/uEnv.txt
Checking if uname_r is set in /boot/uEnv.txt...
Running uname_boot ...
loading /boot/vmlinuz-3.19.0 ...
5293776 bytes read in 415 ms (12.2 MiB/s)
loading /boot/dtbs/3.19.0/imx6q-sabresd.dtb ...
35322 bytes read in 456 ms (75.2 KiB/s)
debug: [console=ttymxc0,115200 root=/dev/mmcblk0p1 ro rootfstype=ext4 rootwait fixrtc quiet init=/lib/systemd/systemd] ...
debug: [bootz 0x12000000 - 0x18000000] ...
Kernel image @ 0x12000000 [ 0x000000 - 0x50c6d0 ]
## Flattened Device Tree blob at 18000000
Booting using the fdt blob at 0x18000000
Using Device Tree in place at 18000000, end 1800b9f9
Starting kernel ...
[ 1.973027] of_dma_request_slave_channel: dma-names property of node '/soc/aips-bus@02100000/i2c@021a0000' missing or empty
[ 1.973807] of_dma_request_slave_channel: dma-names property of node '/soc/aips-bus@02100000/i2c@021a4000' missing or empty
[ 1.974568] of_dma_request_slave_channel: dma-names property of node '/soc/aips-bus@02100000/i2c@021a8000' missing or empty
[ 2.381711] imx6q-pcie 1ffc000.pcie: phy link never came up
[ 2.384062] pwm-backlight backlight: unable to request PWM, trying legacy API
[ 2.384076] pwm-backlight backlight: unable to request legacy PWM
[ 2.466612] Error: Driver 'tfp410' is already registered, aborting...
[ 2.626601] coda 2040000.vpu: firmware request failed
[ 2.828356] pwm-backlight backlight: unable to request PWM, trying legacy API
[ 2.835503] pwm-backlight backlight: unable to request legacy PWM
[ 2.843209] pwm-backlight backlight: unable to request PWM, trying legacy API
[ 2.850433] pwm-backlight backlight: unable to request legacy PWM
[ 2.858155] sr_init: platform driver register failed for SR
[ 2.863927] pwm-backlight backlight: unable to request PWM, trying legacy API
[ 2.880022] pwm-backlight backlight: unable to request PWM, trying legacy API
[ 2.887181] pwm-backlight backlight: unable to request legacy PWM
[ 2.988895] pwm-backlight backlight: unable to request PWM, trying legacy API
[ 2.996169] pwm-backlight backlight: unable to request legacy PWM
systemd-fsck[120]: rootfs: clean, 32707/241920 files, 182650/967424 blocks (check deferred; on battery)
[ 4.296597] m25p80 spi0.0: unrecognized JEDEC id bytes: 00, 0, 0
[ 4.877478] egalax_ts 2-0004: Failed to read firmware version
Debian GNU/Linux 7 sabresd-172 ttymxc0
When I try to use the pci command on u-boot, I only get:
pci_bus_to_hose() failed
The PCI references in my dmesg output are as follows:
[ 2.062416] PCI: CLS 0 bytes, default 64
[ 2.381195] imx6q-pcie 1ffc000.pcie: phy link never came up
[ 2.381459] imx6q-pcie 1ffc000.pcie: PCI host bridge to bus 0000:00
[ 2.381478] pci_bus 0000:00: root bus resource [io 0x1000-0xffff]
[ 2.381493] pci_bus 0000:00: root bus resource [mem 0x01000000-0x01efffff]
[ 2.381506] pci_bus 0000:00: root bus resource [bus 00-ff]
[ 2.381544] pci 0000:00:00.0: [16c3:abcd] type 01 class 0x060400
[ 2.381572] pci 0000:00:00.0: reg 0x10: [mem 0x00000000-0x000fffff]
[ 2.381593] pci 0000:00:00.0: reg 0x38: [mem 0x00000000-0x0000ffff pref]
[ 2.381664] pci 0000:00:00.0: supports D1
[ 2.381675] pci 0000:00:00.0: PME# supported from D0 D1 D3hot D3cold
[ 2.381979] PCI: bus0: Fast back to back transfers disabled
[ 2.382152] PCI: bus1: Fast back to back transfers enabled
[ 2.382170] pci_bus 0000:01: busn_res: [bus 01-ff] end is updated to 01
[ 2.382252] pci 0000:00:00.0: BAR 0: assigned [mem 0x01000000-0x010fffff]
[ 2.382272] pci 0000:00:00.0: BAR 6: assigned [mem 0x01100000-0x0110ffff pref]
[ 2.382288] pci 0000:00:00.0: PCI bridge to [bus 01]
[ 2.382570] pcieport 0000:00:00.0: Signaling PME through PCIe PME interrupt
[ 2.382587] pcie_pme 0000:00:00.0:pcie01: service driver pcie_pme loaded
[ 2.382742] aer 0000:00:00.0:pcie02: service driver aer loaded
[ 2.554849] ehci-pci: EHCI PCI platform driver
lspci -v output:
00:00.0 PCI bridge: Synopsys, Inc. Device abcd (rev 01) (prog-if 00 [Normal decode])
Flags: bus master, fast devsel, latency 0
Memory at 01000000 (32-bit, non-prefetchable) [size=1M]
Bus: primary=00, secondary=01, subordinate=01, sec-latency=0
[virtual] Expansion ROM at 01100000 [disabled] [size=64K]
Capabilities: [40] Power Management version 3
Capabilities: [50] MSI: Enable+ Count=1/1 Maskable+ 64bit+
Capabilities: [70] Express Root Port (Slot-), MSI 00
Capabilities: [100] Advanced Error Reporting
Capabilities: [140] Virtual Channel
Kernel driver in use: pcieport
Any help gratefully received!
: i.MX 6Quad, i.MX 6Dual, i.MX 6DualLite, i.MX 6Solo