diff options
Diffstat (limited to 'target/linux/bcm53xx/patches-4.3/144-PCI-iproc-Improve-link-detection-logic.patch')
| -rw-r--r-- | target/linux/bcm53xx/patches-4.3/144-PCI-iproc-Improve-link-detection-logic.patch | 84 |
1 files changed, 0 insertions, 84 deletions
diff --git a/target/linux/bcm53xx/patches-4.3/144-PCI-iproc-Improve-link-detection-logic.patch b/target/linux/bcm53xx/patches-4.3/144-PCI-iproc-Improve-link-detection-logic.patch deleted file mode 100644 index 3fecba2b26..0000000000 --- a/target/linux/bcm53xx/patches-4.3/144-PCI-iproc-Improve-link-detection-logic.patch +++ /dev/null @@ -1,84 +0,0 @@ -From aaf22ab4e916afa68a2e1aed4e913b76cbd58276 Mon Sep 17 00:00:00 2001 -From: Ray Jui <rjui@broadcom.com> -Date: Tue, 15 Sep 2015 17:39:19 -0700 -Subject: [PATCH 144/147] PCI: iproc: Improve link detection logic - -Improve the link detection logic by explicitly querying the link status -register to ensure link is active. - -Also force class to PCI_CLASS_BRIDGE_PCI (0x0604) through the host -configuration space register. - -Signed-off-by: Ray Jui <rjui@broadcom.com> -Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> -Reviewed-by: Anup Patel <anup.patel@broadcom.com> -Reviewed-by: Scott Branden <sbranden@broadcom.com> ---- - drivers/pci/host/pcie-iproc.c | 29 +++++++++++++++++++++++------ - 1 file changed, 23 insertions(+), 6 deletions(-) - ---- a/drivers/pci/host/pcie-iproc.c -+++ b/drivers/pci/host/pcie-iproc.c -@@ -60,6 +60,12 @@ - #define SYS_RC_INTX_EN 0x330 - #define SYS_RC_INTX_MASK 0xf - -+#define PCIE_LINK_STATUS_OFFSET 0xf0c -+#define PCIE_PHYLINKUP_SHIFT 3 -+#define PCIE_PHYLINKUP BIT(PCIE_PHYLINKUP_SHIFT) -+#define PCIE_DL_ACTIVE_SHIFT 2 -+#define PCIE_DL_ACTIVE BIT(PCIE_DL_ACTIVE_SHIFT) -+ - static inline struct iproc_pcie *iproc_data(struct pci_bus *bus) - { - struct iproc_pcie *pcie; -@@ -138,9 +144,15 @@ static void iproc_pcie_reset(struct ipro - static int iproc_pcie_check_link(struct iproc_pcie *pcie, struct pci_bus *bus) - { - u8 hdr_type; -- u32 link_ctrl; -+ u32 link_ctrl, class, val; - u16 pos, link_status; -- int link_is_active = 0; -+ bool link_is_active = false; -+ -+ val = readl(pcie->base + PCIE_LINK_STATUS_OFFSET); -+ if (!(val & PCIE_PHYLINKUP) || !(val & PCIE_DL_ACTIVE)) { -+ dev_err(pcie->dev, "PHY or data link is INACTIVE!\n"); -+ return -ENODEV; -+ } - - /* make sure we are not in EP mode */ - pci_bus_read_config_byte(bus, 0, PCI_HEADER_TYPE, &hdr_type); -@@ -150,14 +162,19 @@ static int iproc_pcie_check_link(struct - } - - /* force class to PCI_CLASS_BRIDGE_PCI (0x0604) */ -- pci_bus_write_config_word(bus, 0, PCI_CLASS_DEVICE, -- PCI_CLASS_BRIDGE_PCI); -+#define PCI_BRIDGE_CTRL_REG_OFFSET 0x43c -+#define PCI_CLASS_BRIDGE_MASK 0xffff00 -+#define PCI_CLASS_BRIDGE_SHIFT 8 -+ pci_bus_read_config_dword(bus, 0, PCI_BRIDGE_CTRL_REG_OFFSET, &class); -+ class &= ~PCI_CLASS_BRIDGE_MASK; -+ class |= (PCI_CLASS_BRIDGE_PCI << PCI_CLASS_BRIDGE_SHIFT); -+ pci_bus_write_config_dword(bus, 0, PCI_BRIDGE_CTRL_REG_OFFSET, class); - - /* check link status to see if link is active */ - pos = pci_bus_find_capability(bus, 0, PCI_CAP_ID_EXP); - pci_bus_read_config_word(bus, 0, pos + PCI_EXP_LNKSTA, &link_status); - if (link_status & PCI_EXP_LNKSTA_NLW) -- link_is_active = 1; -+ link_is_active = true; - - if (!link_is_active) { - /* try GEN 1 link speed */ -@@ -181,7 +198,7 @@ static int iproc_pcie_check_link(struct - pci_bus_read_config_word(bus, 0, pos + PCI_EXP_LNKSTA, - &link_status); - if (link_status & PCI_EXP_LNKSTA_NLW) -- link_is_active = 1; -+ link_is_active = true; - } - } - |