diff options
Diffstat (limited to 'drivers/pci/host/pci-imx6.c')
| -rw-r--r-- | drivers/pci/host/pci-imx6.c | 33 |
1 files changed, 7 insertions, 26 deletions
diff --git a/drivers/pci/host/pci-imx6.c b/drivers/pci/host/pci-imx6.c index 8c9b389..eb5a275 100644 --- a/drivers/pci/host/pci-imx6.c +++ b/drivers/pci/host/pci-imx6.c @@ -357,33 +357,14 @@ static void imx6_pcie_init_phy(struct pcie_port *pp) static int imx6_pcie_wait_for_link(struct pcie_port *pp) { - unsigned int retries; + /* check if the link is up or not */ + if (!dw_pcie_wait_for_link(pp)) + return 0; - /* - * Test if the PHY reports that the link is up and also that the LTSSM - * training finished. There are three possible states of the link when - * this code is called: - * 1) The link is DOWN (unlikely) - * The link didn't come up yet for some reason. This usually means - * we have a real problem somewhere, if it happens with a peripheral - * connected. This state calls for inspection of the DEBUG registers. - * 2) The link is UP, but still in LTSSM training - * Wait for the training to finish, which should take a very short - * time. If the training does not finish, we have a problem and we - * need to inspect the DEBUG registers. If the training does finish, - * the link is up and operating correctly. - * 3) The link is UP and no longer in LTSSM training - * The link is up and operating correctly. - */ - for (retries = 0; retries < 200; retries++) { - u32 reg = readl(pp->dbi_base + PCIE_PHY_DEBUG_R1); - if ((reg & PCIE_PHY_DEBUG_R1_XMLH_LINK_UP) && - !(reg & PCIE_PHY_DEBUG_R1_XMLH_LINK_IN_TRAINING)) - return 0; - usleep_range(1000, 2000); - } - - return -EINVAL; + 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 -ETIMEDOUT; } static int imx6_pcie_wait_for_speed_change(struct pcie_port *pp) |
