Mini PCIe slot not working

[unknown]

I have tried 6 mini PCIe cards and not a single of them gets detected by the ESPRESSObin. I am using ArchLinux ARM with the latest Kernel.

(please ignore the m.2 card)

[    2.117211] OF: PCI: host bridge /soc/pcie@d0070000 ranges:
[    2.122931] OF: PCI:   MEM 0xe8000000..0xe8ffffff -> 0xe8000000
[    2.129066] OF: PCI:    IO 0xe9000000..0xe900ffff -> 0xe9000000
[    3.135222] advk-pcie d0070000.pcie: link never came up
[    3.140693] advk-pcie d0070000.pcie: PCI host bridge to bus 0000:00
[    3.147069] pci_bus 0000:00: root bus resource [bus 00-ff]
[    3.152722] pci_bus 0000:00: root bus resource [mem 0xe8000000-0xe8ffffff]
[    3.159798] pci_bus 0000:00: root bus resource [io  0x0000-0xffff] (bus address [0xe9000000-0xe900ffff])
[    4.118959] advk-pcie d0070000.pcie: config read/write timed out

Is the slot broken or what’s going on?

[Anonymous]

Mine detect few ath9 cards Atheros 92xx … have you update u-boot to 17.10?

[unknown]

I got the mPCIe slot working now. I had to apply this patch to the kernel:

--- drivers/pci/host/pci-aardvark.c     2018-03-02 21:59:56.553041000 +0100
+++ drivers/pci/host/pci-aardvark.c     2018-03-02 22:00:12.083041000 +0100
@@ -307,10 +307,10 @@
                PCIE_CORE_CTRL2_TD_ENABLE;
        advk_writel(pcie, reg, PCIE_CORE_CTRL2_REG);
 
-       /* Set GEN2 */
+       /* Set GEN1 */
        reg = advk_readl(pcie, PCIE_CORE_CTRL0_REG);
        reg &= ~PCIE_GEN_SEL_MSK;
-       reg |= SPEED_GEN_2;
+       reg |= SPEED_GEN_1;
        advk_writel(pcie, reg, PCIE_CORE_CTRL0_REG);
 
        /* Set lane X1 */

Why on earth is this not done by Marvell? I had to do the same for OpenWRT.

[pali]

Hello! Following patch https://lore.kernel.org/linux-pci/20200430080625.26070-5-pali@kernel.org/ should fix this problem. It configures controller GEN speed based on speed of connected card. So for GEN1 cards is configured SPEED_GEN_1 and for GEN2 cards is configured SPEED_GEN_2.

If you still have more PCIe cards available, could you test them if they finally work with above mentioned patch series on Espressobin?

[Anonymous]

thank you

[Anonymous]

holy, thanks for sharing

[Author]

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