diff options
Diffstat (limited to 'drivers/pci/host/pci-imx6.c')
| -rw-r--r-- | drivers/pci/host/pci-imx6.c | 41 |
1 files changed, 23 insertions, 18 deletions
diff --git a/drivers/pci/host/pci-imx6.c b/drivers/pci/host/pci-imx6.c index 7af64b2639b4..8a6a8d573e2b 100644 --- a/drivers/pci/host/pci-imx6.c +++ b/drivers/pci/host/pci-imx6.c @@ -95,8 +95,9 @@ struct imx6_pcie { #define PHY_RX_OVRD_IN_LO_RX_DATA_EN (1 << 5) #define PHY_RX_OVRD_IN_LO_RX_PLL_EN (1 << 3) -static int pcie_phy_poll_ack(void __iomem *dbi_base, int exp_val) +static int pcie_phy_poll_ack(struct imx6_pcie *imx6_pcie, int exp_val) { + void __iomem *dbi_base = imx6_pcie->pp.dbi_base; u32 val; u32 max_iterations = 10; u32 wait_counter = 0; @@ -115,8 +116,9 @@ static int pcie_phy_poll_ack(void __iomem *dbi_base, int exp_val) return -ETIMEDOUT; } -static int pcie_phy_wait_ack(void __iomem *dbi_base, int addr) +static int pcie_phy_wait_ack(struct imx6_pcie *imx6_pcie, int addr) { + void __iomem *dbi_base = imx6_pcie->pp.dbi_base; u32 val; int ret; @@ -126,23 +128,24 @@ static int pcie_phy_wait_ack(void __iomem *dbi_base, int addr) val |= (0x1 << PCIE_PHY_CTRL_CAP_ADR_LOC); writel(val, dbi_base + PCIE_PHY_CTRL); - ret = pcie_phy_poll_ack(dbi_base, 1); + ret = pcie_phy_poll_ack(imx6_pcie, 1); if (ret) return ret; val = addr << PCIE_PHY_CTRL_DATA_LOC; writel(val, dbi_base + PCIE_PHY_CTRL); - return pcie_phy_poll_ack(dbi_base, 0); + return pcie_phy_poll_ack(imx6_pcie, 0); } /* Read from the 16-bit PCIe PHY control registers (not memory-mapped) */ -static int pcie_phy_read(void __iomem *dbi_base, int addr, int *data) +static int pcie_phy_read(struct imx6_pcie *imx6_pcie, int addr, int *data) { + void __iomem *dbi_base = imx6_pcie->pp.dbi_base; u32 val, phy_ctl; int ret; - ret = pcie_phy_wait_ack(dbi_base, addr); + ret = pcie_phy_wait_ack(imx6_pcie, addr); if (ret) return ret; @@ -150,7 +153,7 @@ static int pcie_phy_read(void __iomem *dbi_base, int addr, int *data) phy_ctl = 0x1 << PCIE_PHY_CTRL_RD_LOC; writel(phy_ctl, dbi_base + PCIE_PHY_CTRL); - ret = pcie_phy_poll_ack(dbi_base, 1); + ret = pcie_phy_poll_ack(imx6_pcie, 1); if (ret) return ret; @@ -160,17 +163,18 @@ static int pcie_phy_read(void __iomem *dbi_base, int addr, int *data) /* deassert Read signal */ writel(0x00, dbi_base + PCIE_PHY_CTRL); - return pcie_phy_poll_ack(dbi_base, 0); + return pcie_phy_poll_ack(imx6_pcie, 0); } -static int pcie_phy_write(void __iomem *dbi_base, int addr, int data) +static int pcie_phy_write(struct imx6_pcie *imx6_pcie, int addr, int data) { + void __iomem *dbi_base = imx6_pcie->pp.dbi_base; u32 var; int ret; /* write addr */ /* cap addr */ - ret = pcie_phy_wait_ack(dbi_base, addr); + ret = pcie_phy_wait_ack(imx6_pcie, addr); if (ret) return ret; @@ -181,7 +185,7 @@ static int pcie_phy_write(void __iomem *dbi_base, int addr, int data) var |= (0x1 << PCIE_PHY_CTRL_CAP_DAT_LOC); writel(var, dbi_base + PCIE_PHY_CTRL); - ret = pcie_phy_poll_ack(dbi_base, 1); + ret = pcie_phy_poll_ack(imx6_pcie, 1); if (ret) return ret; @@ -190,7 +194,7 @@ static int pcie_phy_write(void __iomem *dbi_base, int addr, int data) writel(var, dbi_base + PCIE_PHY_CTRL); /* wait for ack de-assertion */ - ret = pcie_phy_poll_ack(dbi_base, 0); + ret = pcie_phy_poll_ack(imx6_pcie, 0); if (ret) return ret; @@ -199,7 +203,7 @@ static int pcie_phy_write(void __iomem *dbi_base, int addr, int data) writel(var, dbi_base + PCIE_PHY_CTRL); /* wait for ack */ - ret = pcie_phy_poll_ack(dbi_base, 1); + ret = pcie_phy_poll_ack(imx6_pcie, 1); if (ret) return ret; @@ -208,7 +212,7 @@ static int pcie_phy_write(void __iomem *dbi_base, int addr, int data) writel(var, dbi_base + PCIE_PHY_CTRL); /* wait for ack de-assertion */ - ret = pcie_phy_poll_ack(dbi_base, 0); + ret = pcie_phy_poll_ack(imx6_pcie, 0); if (ret) return ret; @@ -219,19 +223,20 @@ static int pcie_phy_write(void __iomem *dbi_base, int addr, int data) static void imx6_pcie_reset_phy(struct pcie_port *pp) { + struct imx6_pcie *imx6_pcie = to_imx6_pcie(pp); u32 tmp; - pcie_phy_read(pp->dbi_base, PHY_RX_OVRD_IN_LO, &tmp); + pcie_phy_read(imx6_pcie, PHY_RX_OVRD_IN_LO, &tmp); tmp |= (PHY_RX_OVRD_IN_LO_RX_DATA_EN | PHY_RX_OVRD_IN_LO_RX_PLL_EN); - pcie_phy_write(pp->dbi_base, PHY_RX_OVRD_IN_LO, tmp); + pcie_phy_write(imx6_pcie, PHY_RX_OVRD_IN_LO, tmp); usleep_range(2000, 3000); - pcie_phy_read(pp->dbi_base, PHY_RX_OVRD_IN_LO, &tmp); + pcie_phy_read(imx6_pcie, PHY_RX_OVRD_IN_LO, &tmp); tmp &= ~(PHY_RX_OVRD_IN_LO_RX_DATA_EN | PHY_RX_OVRD_IN_LO_RX_PLL_EN); - pcie_phy_write(pp->dbi_base, PHY_RX_OVRD_IN_LO, tmp); + pcie_phy_write(imx6_pcie, PHY_RX_OVRD_IN_LO, tmp); } /* Added for PCI abort handling */ |