60 lines
1.9 KiB
Diff
60 lines
1.9 KiB
Diff
From d0ff7a1bcfe886cab1a237895b08ac51ecfe10e7 Mon Sep 17 00:00:00 2001
|
|
From: Tim Harvey <tharvey@gateworks.com>
|
|
Date: Wed, 10 Apr 2019 08:00:47 -0700
|
|
Subject: [PATCH 04/12] PCI: add quirk for Gateworks PLX PEX860x switch with
|
|
GPIO PERST#
|
|
|
|
Gateworks boards use PLX PEX860x switches where downstream ports
|
|
have their PERST# driven from the PEX GPIO.
|
|
|
|
Signed-off-by: Tim Harvey <tharvey@gateworks.com>
|
|
---
|
|
drivers/pci/quirks.c | 32 ++++++++++++++++++++++++++++++++
|
|
1 file changed, 32 insertions(+)
|
|
|
|
--- a/drivers/pci/quirks.c
|
|
+++ b/drivers/pci/quirks.c
|
|
@@ -25,6 +25,7 @@
|
|
#include <linux/ktime.h>
|
|
#include <linux/mm.h>
|
|
#include <linux/nvme.h>
|
|
+#include <linux/of.h>
|
|
#include <linux/platform_data/x86/apple.h>
|
|
#include <linux/pm_runtime.h>
|
|
#include <linux/suspend.h>
|
|
@@ -5769,3 +5770,34 @@ static void nvidia_ion_ahci_fixup(struct
|
|
pdev->dev_flags |= PCI_DEV_FLAGS_HAS_MSI_MASKING;
|
|
}
|
|
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_NVIDIA, 0x0ab8, nvidia_ion_ahci_fixup);
|
|
+
|
|
+#ifdef CONFIG_PCI_HOST_THUNDER_PEM
|
|
+/*
|
|
+ * fixup for PLX PEX8909 bridge to configure GPIO1-7 as output High
|
|
+ * as they are used for slots1-7 PERST#
|
|
+ */
|
|
+static void newport_pciesw_early_fixup(struct pci_dev *dev)
|
|
+{
|
|
+ u32 dw;
|
|
+
|
|
+ if (!of_machine_is_compatible("gw,newport"))
|
|
+ return;
|
|
+
|
|
+ if (dev->devfn != 0)
|
|
+ return;
|
|
+
|
|
+ dev_info(&dev->dev, "de-asserting PERST#\n");
|
|
+ pci_read_config_dword(dev, 0x62c, &dw);
|
|
+ dw |= 0xaaa8; /* GPIO1-7 outputs */
|
|
+ pci_write_config_dword(dev, 0x62c, dw);
|
|
+
|
|
+ pci_read_config_dword(dev, 0x644, &dw);
|
|
+ dw |= 0xfe; /* GPIO1-7 output high */
|
|
+ pci_write_config_dword(dev, 0x644, dw);
|
|
+
|
|
+ msleep(100);
|
|
+}
|
|
+DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_PLX, 0x8609, newport_pciesw_early_fixup);
|
|
+DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_PLX, 0x8606, newport_pciesw_early_fixup);
|
|
+DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_PLX, 0x8604, newport_pciesw_early_fixup);
|
|
+#endif /* CONFIG_PCI_HOST_THUNDER_PEM */
|