[U-Boot] [PATCHv4 08/12] pci: ls_pcie_g4: add Workaround for A-011577
Z.q. Hou
zhiqiang.hou at nxp.com
Mon Mar 11 02:58:26 UTC 2019
From: Hou Zhiqiang <Zhiqiang.Hou at nxp.com>
PCIe configuration access to non-existent function triggered
SERROR interrupt exception.
Workaround:
Disable error reporting on AXI bus during the Vendor ID read
transactions in enumeration.
This ERRATA is only for LX2160A Rev1.0 and will be fixed in Rev2.0.
Signed-off-by: Hou Zhiqiang <Zhiqiang.Hou at nxp.com>
---
V4:
- No change
drivers/pci/pcie_layerscape_gen4.c | 8 ++++++++
drivers/pci/pcie_layerscape_gen4.h | 5 +++++
2 files changed, 13 insertions(+)
diff --git a/drivers/pci/pcie_layerscape_gen4.c b/drivers/pci/pcie_layerscape_gen4.c
index 4e0d5b168e..799da2f7df 100644
--- a/drivers/pci/pcie_layerscape_gen4.c
+++ b/drivers/pci/pcie_layerscape_gen4.c
@@ -242,6 +242,9 @@ static int ls_pcie_g4_read_config(struct udevice *bus, pci_dev_t bdf,
address = ls_pcie_g4_conf_address(pcie, bdf, offset);
+ if (pcie->rev == REV_1_0 && offset == PCI_VENDOR_ID)
+ lut_writel(pcie, 0x0 << PCIE_LUT_GCR_RRE, PCIE_LUT_GCR);
+
switch (size) {
case PCI_SIZE_8:
*valuep = readb(address);
@@ -257,6 +260,9 @@ static int ls_pcie_g4_read_config(struct udevice *bus, pci_dev_t bdf,
break;
}
+ if (pcie->rev == REV_1_0 && offset == PCI_VENDOR_ID)
+ lut_writel(pcie, 0x1 << PCIE_LUT_GCR_RRE, PCIE_LUT_GCR);
+
return ret;
}
@@ -518,6 +524,8 @@ static int ls_pcie_g4_probe(struct udevice *dev)
dev->name, (unsigned long)pcie->ccsr, (unsigned long)pcie->cfg,
pcie->big_endian);
+ pcie->rev = readb(pcie->ccsr + PCI_REVISION_ID);
+
pcie->mode = readb(pcie->ccsr + PCI_HEADER_TYPE) & 0x7f;
if (pcie->mode == PCI_HEADER_TYPE_NORMAL) {
diff --git a/drivers/pci/pcie_layerscape_gen4.h b/drivers/pci/pcie_layerscape_gen4.h
index 356b49f9ce..137768cae7 100644
--- a/drivers/pci/pcie_layerscape_gen4.h
+++ b/drivers/pci/pcie_layerscape_gen4.h
@@ -11,6 +11,8 @@
#include <pci.h>
#include <dm.h>
+#define REV_1_0 (0x10)
+
#ifndef CONFIG_SYS_PCI_MEMORY_SIZE
#define CONFIG_SYS_PCI_MEMORY_SIZE (4 * 1024 * 1024 * 1024ULL)
#endif
@@ -161,6 +163,8 @@
#define PCIE_LUT_LDR(n) (0x804 + (n) * 8)
#define PCIE_LUT_ENABLE BIT(31)
#define PCIE_LUT_ENTRY_COUNT 32
+#define PCIE_LUT_GCR (0x28)
+#define PCIE_LUT_GCR_RRE (0)
/* PF control registers */
#define PCIE_LTSSM_STA 0x7fc
@@ -190,6 +194,7 @@ struct ls_pcie_g4 {
int stream_id_cur;
int mode;
int sriov_support;
+ u8 rev;
};
extern struct list_head ls_pcie_g4_list;
--
2.17.1
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