diff mbox

[2/4] PCI: imx6: move PHY reset into establish_link

Message ID 1452884210-11359-3-git-send-email-l.stach@pengutronix.de
State Accepted
Headers show

Commit Message

Lucas Stach Jan. 15, 2016, 6:56 p.m. UTC 
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@pengutronix.de>
---
 drivers/pci/host/pci-imx6.c | 28 +++++++++++++++-------------
 1 file changed, 15 insertions(+), 13 deletions(-)
diff mbox

Patch

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;
 }