[OpenWrt-Devel] ramips/mt7621 after 5.4 switch
Andre Valentin
avalentin at marcant.net
Wed Apr 8 03:13:03 EDT 2020
Hi Sergio!
Am 08.04.20 um 06:28 schrieb Sergio Paracuellos:
> Hi Andre,
>
> On Tue, Apr 7, 2020 at 9:28 PM Andre Valentin <avalentin at marcant.net> wrote:
>>
>> Am 07.04.20 um 20:05 schrieb Sergio Paracuellos:
>>> Hi,
>>>
>>> On Tue, Apr 7, 2020 at 12:16 PM Chuanhong Guo <gch981213 at gmail.com> wrote:
>>>>
>>>> [CC Sergio who worked on upstream PCIE driver]
>>>>
>>>> On Tue, Apr 7, 2020 at 4:45 PM Andre Valentin <avalentin at marcant.net> wrote:
>>>>>
>>>>> Hi!
>>>>>
>>>>> Currently I'm having some serious problems with the new 5.4 port.
>>>>> 1) PCIe
>>>>> I'm developing on the ZyXEL LTE3301-PLUS. It has PCIe and a mt7615e connected to second bus on the first phy.
>>>>> If booting the device, kernel hangs with a RST message, telling the device is not detected. It seems the PCIe bus 1
>>>>> cannot be reseted because nothing is connected to bus 0.
>>>>> An upport of the old PCI driver reenables the function. I can provide more logs on this if needed.
>>>
>>> Logs and dmesg traces are always welcome and would be helpful. Both
>>> working and not working traces.
>>
>> Of course, here we go with the old PCIe driver taken from 4.14 openwrt kernel:
>> [ 0.485729] pinctrl core: add 0 pinctrl maps
>> [ 0.485865] pull PCIe RST: RALINK_RSTCTRL = 4000000
>> [ 0.796015] release PCIe RST: RALINK_RSTCTRL = 7000000
>> [ 0.806088] ***** Xtal 40MHz *****
>> [ 0.812829] release PCIe RST: RALINK_RSTCTRL = 7000000
>> [ 0.823025] Port 0 N_FTS = 1b102800
>> [ 0.829933] Port 1 N_FTS = 1b105000
>> [ 0.836849] Port 2 N_FTS = 1b102800
>> [ 1.995991] PCIE0 no card, disable it(RST&CLK)
>> [ 2.004682] PCIE2 no card, disable it(RST&CLK)
>> [ 2.013495] -> 20107f2
>> [ 2.018328] PCIE1 enabled
>> [ 2.023532] PCI host bridge /pcie at 1e140000 ranges:
>> [ 2.033045] MEM 0x0000000060000000..0x000000006fffffff
>> [ 2.043401] IO 0x000000001e160000..0x000000001e16ffff
>> [ 2.053762] PCI coherence region base: 0xbfbf8000, mask/settings: 0x60000000
>> [ 2.091056] PCI host bridge to bus 0000:00
>> [ 2.099131] pci_bus 0000:00: root bus resource [mem 0x60000000-0x6fffffff]
>> [ 2.112734] pci_bus 0000:00: root bus resource [io 0xffffffff]
>> [ 2.124486] pci_bus 0000:00: root bus resource [??? 0x00000000 flags 0x0]
>> [ 2.137962] pci_bus 0000:00: No busn resource found for root bus, will use [bus 00-ff]
>> [ 2.153766] pci 0000:00:00.0: [0e8d:0801] type 01 class 0x060400
>> [ 2.165651] pci 0000:00:00.0: reg 0x10: [mem 0x00000000-0x7fffffff]
>> [ 2.178057] pci 0000:00:00.0: reg 0x14: [mem 0x60100000-0x6010ffff]
>> [ 2.190585] pci 0000:00:00.0: supports D1
>> [ 2.198439] pci 0000:00:00.0: PME# supported from D0 D1 D3hot
>> [ 2.211463] random: fast init done
>> [ 2.211838] pci 0000:01:00.0: [14c3:7615] type 00 class 0x000280
>> [ 2.230071] pci 0000:01:00.0: reg 0x10: [mem 0x00000000-0x000fffff 64bit]
>> [ 2.243675] pci 0000:01:00.0: 2.000 Gb/s available PCIe bandwidth, limited by 2.5 GT/s x1 link at 0000:00:00.0 (capable of 4.000 Gb/s with 5 GT/s x1 link)
>> [ 2.272296] pci_bus 0000:01: busn_res: [bus 01-ff] end is updated to 01
>> [ 2.285339] pci_bus 0000:00: busn_res: [bus 00-ff] end is updated to 01
>> [ 2.298493] pci 0000:00:00.0: BAR 0: no space for [mem size 0x80000000]
>> [ 2.311581] pci 0000:00:00.0: BAR 0: failed to assign [mem size 0x80000000]
>> [ 2.325410] pci 0000:00:00.0: BAR 8: assigned [mem 0x60000000-0x600fffff]
>> [ 2.338888] pci 0000:00:00.0: BAR 1: assigned [mem 0x60100000-0x6010ffff]
>> [ 2.352376] pci 0000:01:00.0: BAR 0: assigned [mem 0x60000000-0x600fffff 64bit]
>> [ 2.366887] pci 0000:00:00.0: PCI bridge to [bus 01]
>> [ 2.376728] pci 0000:00:00.0: bridge window [mem 0x60000000-0x600fffff]
>>
>>
>> And this is on 5.4 with the new driver with pcie0 status=disabled:
>> [ 30.464407] mt7621-pci 1e140000.pcie: GPIO lookup for consumer reset
>> [ 30.464415] mt7621-pci 1e140000.pcie: using device tree for GPIO lookup
>> [ 30.464474] mt7621-pci 1e140000.pcie: using lookup tables for GPIO lookup
>> [ 30.464484] mt7621-pci 1e140000.pcie: No GPIO consumer reset found
>> [ 30.664239] mt7621-pci 1e140000.pcie: pcie1 no card, disable it (RST & CLK)
>> [ 30.678128] mt7621-pci 1e140000.pcie: Nothing is connected in virtual bridges. Exiting...
>> booting goes on.
>>
>> And with pcie status=enabled:
>> [ 32.415863] rt2880-pinmux pinctrl: pcie is already enabled
>> [ 32.426821] mt7621-pci 1e140000.pcie: Error applying setting, reverse things back
>> [ 32.441900] mt7621-pci-phy 1e149000.pcie-phy: PHY for 0xbe149000 (dual port = 1)
>> [ 32.456880] mt7621-pci-phy 1e14a000.pcie-phy: PHY for 0xbe14a000 (dual port = 0)
>> [ 32.571556] mt7621-pci-phy 1e149000.pcie-phy: Xtal is 40MHz
>> [ 32.582680] mt7621-pci-phy 1e14a000.pcie-phy: Xtal is 40MHz
>> [ 32.693592] mt7621-pci 1e140000.pcie: pcie0 no card, disable it (RST & CLK)
>> hangs.
>
> I think the problem here is that upstream driver use two phy's nodes
> with pcie-phy0 being a dual ported one.
> Because there is nothing connected in pcie0 the phy is just stopped
> assuming nothing will be connected also in pcie1.
> Just to see if that is the problem, can you please patch the
> 'mt7621_pcie_init_ports' function and comment the following piece of
> code:
>
> if (slot != 1)
> phy_power_off(port->phy);
>
> Let's see what happens.
Hmm, that did the trick:
[ 30.444228] rt2880-pinmux pinctrl: found group selector 6 for pcie
[ 30.444249] rt2880-pinmux pinctrl: request pin 19 (io19) for 1e140000.pcie
[ 30.444396] mt7621-pci 1e140000.pcie: Parsing DT failed
[ 32.403940] rt2880-pinmux pinctrl: found group selector 6 for pcie
[ 32.403963] rt2880-pinmux pinctrl: request pin 19 (io19) for 1e140000.pcie
[ 32.403977] rt2880-pinmux pinctrl: pcie is already enabled
[ 32.414931] mt7621-pci 1e140000.pcie: Error applying setting, reverse things back
[ 32.430012] mt7621-pci-phy 1e149000.pcie-phy: PHY for 0xbe149000 (dual port = 1)
[ 32.444754] mt7621-pci 1e140000.pcie: GPIO lookup for consumer reset
[ 32.444763] mt7621-pci 1e140000.pcie: using device tree for GPIO lookup
[ 32.444811] of_get_named_gpiod_flags: parsed 'reset-gpios' property of node '/pcie at 1e140000[0]' - status (0)
[ 32.444875] mt7621-pci 1e140000.pcie: GPIO lookup for consumer reset
[ 32.444883] mt7621-pci 1e140000.pcie: using device tree for GPIO lookup
[ 32.444906] of_get_named_gpiod_flags: can't parse 'reset-gpios' property of node '/pcie at 1e140000[1]'
[ 32.444924] of_get_named_gpiod_flags: can't parse 'reset-gpio' property of node '/pcie at 1e140000[1]'
[ 32.444935] mt7621-pci 1e140000.pcie: using lookup tables for GPIO lookup
[ 32.444945] mt7621-pci 1e140000.pcie: No GPIO consumer reset found
[ 32.445011] mt7621-pci-phy 1e14a000.pcie-phy: PHY for 0xbe14a000 (dual port = 0)
[ 32.459753] mt7621-pci 1e140000.pcie: GPIO lookup for consumer reset
[ 32.459761] mt7621-pci 1e140000.pcie: using device tree for GPIO lookup
[ 32.459791] of_get_named_gpiod_flags: can't parse 'reset-gpios' property of node '/pcie at 1e140000[2]'
[ 32.459808] of_get_named_gpiod_flags: can't parse 'reset-gpio' property of node '/pcie at 1e140000[2]'
[ 32.459818] mt7621-pci 1e140000.pcie: using lookup tables for GPIO lookup
[ 32.459826] mt7621-pci 1e140000.pcie: No GPIO consumer reset found
[ 32.559695] mt7621-pci-phy 1e149000.pcie-phy: Xtal is 40MHz
[ 32.570819] mt7621-pci-phy 1e14a000.pcie-phy: Xtal is 40MHz
[ 32.681732] mt7621-pci 1e140000.pcie: pcie0 no card, disable it (RST & CLK)
[ 32.695603] mt7621-pci 1e140000.pcie: pcie2 no card, disable it (RST & CLK)
[ 32.709477] mt7621-pci 1e140000.pcie: PCIE1 enabled
[ 32.719207] mt7621-pci 1e140000.pcie: PCI coherence region base: 0x60000000, mask/settings: 0xf0000002
[ 32.737964] mt7621-pci 1e140000.pcie: PCI host bridge to bus 0000:00
[ 32.750653] pci_bus 0000:00: root bus resource [io 0x1e160000-0x1e16ffff]
[ 32.764358] pci_bus 0000:00: root bus resource [mem 0x60000000-0x6fffffff]
[ 32.778073] pci_bus 0000:00: root bus resource [bus 00-ff]
[ 32.789053] pci 0000:00:00.0: [0e8d:0801] type 01 class 0x060400
[ 32.801064] pci 0000:00:00.0: reg 0x10: [mem 0x00000000-0x7fffffff]
[ 32.813561] pci 0000:00:00.0: reg 0x14: [mem 0x00000000-0x0000ffff]
[ 32.826152] pci 0000:00:00.0: supports D1
[ 32.834144] pci 0000:00:00.0: PME# supported from D0 D1 D3hot
[ 32.846953] pci 0000:00:00.0: bridge configuration invalid ([bus 00-00]), reconfiguring
[ 32.863173] pci 0000:01:00.0: [14c3:7615] type 00 class 0x000280
[ 32.875209] pci 0000:01:00.0: reg 0x10: [mem 0x00000000-0x000fffff 64bit]
[ 32.888911] pci 0000:01:00.0: 2.000 Gb/s available PCIe bandwidth, limited by 2.5 GT/s x1 link at 0000:00:00.0 (capable of 4.000 Gb/s with 5 GT/s x1 link)
[ 32.917782] pci 0000:00:00.0: PCI bridge to [bus 01-ff]
[ 32.928208] pci 0000:00:00.0: bridge window [io 0x0000-0x0fff]
[ 32.940355] pci 0000:00:00.0: bridge window [mem 0x00000000-0x000fffff]
[ 32.953890] pci 0000:00:00.0: bridge window [mem 0x00000000-0x000fffff pref]
[ 32.968289] pci_bus 0000:01: busn_res: [bus 01-ff] end is updated to 01
[ 32.981535] pci 0000:00:00.0: BAR 0: no space for [mem size 0x80000000]
[ 32.994721] pci 0000:00:00.0: BAR 0: failed to assign [mem size 0x80000000]
[ 33.008598] pci 0000:00:00.0: BAR 8: assigned [mem 0x60000000-0x600fffff]
[ 33.022134] pci 0000:00:00.0: BAR 9: assigned [mem 0x60100000-0x601fffff pref]
[ 33.036535] pci 0000:00:00.0: BAR 1: assigned [mem 0x60200000-0x6020ffff]
[ 33.050082] pci 0000:00:00.0: BAR 7: assigned [io 0x1e160000-0x1e160fff]
[ 33.063622] pci 0000:01:00.0: BAR 0: assigned [mem 0x60000000-0x600fffff 64bit]
[ 33.078208] pci 0000:00:00.0: PCI bridge to [bus 01]
[ 33.088106] pci 0000:00:00.0: bridge window [io 0x1e160000-0x1e160fff]
[ 33.101640] pci 0000:00:00.0: bridge window [mem 0x60000000-0x600fffff]
[ 33.115169] pci 0000:00:00.0: bridge window [mem 0x60100000-0x601fffff pref]
[ 45.990931] pci 0000:00:00.0: enabling device (0004 -> 0007)
It works, yeah! But what now? Do you fix the driver? When I can help/test ..
Thanks,
André
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