This adds the PHY reset into a common error path of the
establish_link function, deduplicating some of the debug
prints. Also reduce the severity of the "no-link" message
in the one place where it is expected to be hit when no
peripheral is attached.
Signed-off-by: Lucas Stach <l.stach@xxxxxxxxxxxxxx>
---
drivers/pci/host/pci-imx6.c | 28 +++++++++++++++-------------
1 file changed, 15 insertions(+), 13 deletions(-)
diff --git a/drivers/pci/host/pci-imx6.c b/drivers/pci/host/pci-imx6.c
index 48ee2ed26be3..3bb8ccc68792 100644
--- a/drivers/pci/host/pci-imx6.c
+++ b/drivers/pci/host/pci-imx6.c
@@ -355,10 +355,6 @@ static int imx6_pcie_wait_for_link(struct pcie_port *pp)
usleep_range(100, 1000);
}
- dev_err(pp->dev, "phy link never came up\n");
- dev_dbg(pp->dev, "DEBUG_R0: 0x%08x, DEBUG_R1: 0x%08x\n",
- readl(pp->dbi_base + PCIE_PHY_DEBUG_R0),
- readl(pp->dbi_base + PCIE_PHY_DEBUG_R1));
return -EINVAL;
}
@@ -407,8 +403,10 @@ static int imx6_pcie_establish_link(struct pcie_port *pp)
IMX6Q_GPR12_PCIE_CTL_2, 1 << 10);
ret = imx6_pcie_wait_for_link(pp);
- if (ret)
- return ret;
+ if (ret) {
+ dev_info(pp->dev, "Link never came up\n");
+ goto err_reset_phy;
+ }
/* Allow Gen2 mode after the link is up. */
tmp = readl(pp->dbi_base + PCIE_RC_LCR);
@@ -427,19 +425,28 @@ static int imx6_pcie_establish_link(struct pcie_port *pp)
ret = imx6_pcie_wait_for_speed_change(pp);
if (ret) {
dev_err(pp->dev, "Failed to bring link up!\n");
- return ret;
+ goto err_reset_phy;
}
/* Make sure link training is finished as well! */
ret = imx6_pcie_wait_for_link(pp);
if (ret) {
dev_err(pp->dev, "Failed to bring link up!\n");
- return ret;
+ goto err_reset_phy;
}
tmp = readl(pp->dbi_base + PCIE_RC_LCSR);
dev_dbg(pp->dev, "Link up, Gen=%i\n", (tmp >> 16) & 0xf);
+
return 0;
+
+err_reset_phy:
+ dev_dbg(pp->dev, "PHY DEBUG_R0=0x%08x DEBUG_R1=0x%08x\n",
+ readl(pp->dbi_base + PCIE_PHY_DEBUG_R0),
+ readl(pp->dbi_base + PCIE_PHY_DEBUG_R1));
+ imx6_pcie_reset_phy(pp);
+
+ return ret;
}
static void imx6_pcie_host_init(struct pcie_port *pp)
@@ -510,11 +517,6 @@ static int imx6_pcie_link_up(struct pcie_port *pp)
if ((debug_r0 & 0x3f) != 0x0d)
return 0;
- dev_err(pp->dev, "transition to gen2 is stuck, reset PHY!\n");
- dev_dbg(pp->dev, "debug_r0=%08x debug_r1=%08x\n", debug_r0, rc);
-
- imx6_pcie_reset_phy(pp);
-
return 0;
}
--
2.6.4
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