From 2a6a85d5368e55e506abd7ca79f08131028bb0bc Mon Sep 17 00:00:00 2001 From: Bjorn Helgaas Date: Tue, 11 Oct 2016 22:18:26 -0500 Subject: PCI: imx6: Use generic DesignWare accessors The dw_pcie_readl_rc() and dw_pcie_writel_rc() interfaces already add in pp->dbi_base, so use those instead of doing it ourselves in the imx6 driver. No functional change intended. Signed-off-by: Bjorn Helgaas --- drivers/pci/host/pci-imx6.c | 67 ++++++++++++++++++++++----------------------- 1 file changed, 33 insertions(+), 34 deletions(-) (limited to 'drivers/pci') diff --git a/drivers/pci/host/pci-imx6.c b/drivers/pci/host/pci-imx6.c index 7dfe400f6606..bedd4368aba3 100644 --- a/drivers/pci/host/pci-imx6.c +++ b/drivers/pci/host/pci-imx6.c @@ -97,13 +97,13 @@ struct imx6_pcie { static int pcie_phy_poll_ack(struct imx6_pcie *imx6_pcie, int exp_val) { - void __iomem *dbi_base = imx6_pcie->pp.dbi_base; + struct pcie_port *pp = &imx6_pcie->pp; u32 val; u32 max_iterations = 10; u32 wait_counter = 0; do { - val = readl(dbi_base + PCIE_PHY_STAT); + val = dw_pcie_readl_rc(pp, PCIE_PHY_STAT); val = (val >> PCIE_PHY_STAT_ACK_LOC) & 0x1; wait_counter++; @@ -118,22 +118,22 @@ static int pcie_phy_poll_ack(struct imx6_pcie *imx6_pcie, int exp_val) static int pcie_phy_wait_ack(struct imx6_pcie *imx6_pcie, int addr) { - void __iomem *dbi_base = imx6_pcie->pp.dbi_base; + struct pcie_port *pp = &imx6_pcie->pp; u32 val; int ret; val = addr << PCIE_PHY_CTRL_DATA_LOC; - writel(val, dbi_base + PCIE_PHY_CTRL); + dw_pcie_writel_rc(pp, PCIE_PHY_CTRL, val); val |= (0x1 << PCIE_PHY_CTRL_CAP_ADR_LOC); - writel(val, dbi_base + PCIE_PHY_CTRL); + dw_pcie_writel_rc(pp, PCIE_PHY_CTRL, val); 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); + dw_pcie_writel_rc(pp, PCIE_PHY_CTRL, val); return pcie_phy_poll_ack(imx6_pcie, 0); } @@ -141,7 +141,7 @@ static int pcie_phy_wait_ack(struct imx6_pcie *imx6_pcie, int addr) /* Read from the 16-bit PCIe PHY control registers (not memory-mapped) */ static int pcie_phy_read(struct imx6_pcie *imx6_pcie, int addr, int *data) { - void __iomem *dbi_base = imx6_pcie->pp.dbi_base; + struct pcie_port *pp = &imx6_pcie->pp; u32 val, phy_ctl; int ret; @@ -151,24 +151,24 @@ static int pcie_phy_read(struct imx6_pcie *imx6_pcie, int addr, int *data) /* assert Read signal */ phy_ctl = 0x1 << PCIE_PHY_CTRL_RD_LOC; - writel(phy_ctl, dbi_base + PCIE_PHY_CTRL); + dw_pcie_writel_rc(pp, PCIE_PHY_CTRL, phy_ctl); ret = pcie_phy_poll_ack(imx6_pcie, 1); if (ret) return ret; - val = readl(dbi_base + PCIE_PHY_STAT); + val = dw_pcie_readl_rc(pp, PCIE_PHY_STAT); *data = val & 0xffff; /* deassert Read signal */ - writel(0x00, dbi_base + PCIE_PHY_CTRL); + dw_pcie_writel_rc(pp, PCIE_PHY_CTRL, 0x00); return pcie_phy_poll_ack(imx6_pcie, 0); } static int pcie_phy_write(struct imx6_pcie *imx6_pcie, int addr, int data) { - void __iomem *dbi_base = imx6_pcie->pp.dbi_base; + struct pcie_port *pp = &imx6_pcie->pp; u32 var; int ret; @@ -179,11 +179,11 @@ static int pcie_phy_write(struct imx6_pcie *imx6_pcie, int addr, int data) return ret; var = data << PCIE_PHY_CTRL_DATA_LOC; - writel(var, dbi_base + PCIE_PHY_CTRL); + dw_pcie_writel_rc(pp, PCIE_PHY_CTRL, var); /* capture data */ var |= (0x1 << PCIE_PHY_CTRL_CAP_DAT_LOC); - writel(var, dbi_base + PCIE_PHY_CTRL); + dw_pcie_writel_rc(pp, PCIE_PHY_CTRL, var); ret = pcie_phy_poll_ack(imx6_pcie, 1); if (ret) @@ -191,7 +191,7 @@ static int pcie_phy_write(struct imx6_pcie *imx6_pcie, int addr, int data) /* deassert cap data */ var = data << PCIE_PHY_CTRL_DATA_LOC; - writel(var, dbi_base + PCIE_PHY_CTRL); + dw_pcie_writel_rc(pp, PCIE_PHY_CTRL, var); /* wait for ack de-assertion */ ret = pcie_phy_poll_ack(imx6_pcie, 0); @@ -200,7 +200,7 @@ static int pcie_phy_write(struct imx6_pcie *imx6_pcie, int addr, int data) /* assert wr signal */ var = 0x1 << PCIE_PHY_CTRL_WR_LOC; - writel(var, dbi_base + PCIE_PHY_CTRL); + dw_pcie_writel_rc(pp, PCIE_PHY_CTRL, var); /* wait for ack */ ret = pcie_phy_poll_ack(imx6_pcie, 1); @@ -209,14 +209,14 @@ static int pcie_phy_write(struct imx6_pcie *imx6_pcie, int addr, int data) /* deassert wr signal */ var = data << PCIE_PHY_CTRL_DATA_LOC; - writel(var, dbi_base + PCIE_PHY_CTRL); + dw_pcie_writel_rc(pp, PCIE_PHY_CTRL, var); /* wait for ack de-assertion */ ret = pcie_phy_poll_ack(imx6_pcie, 0); if (ret) return ret; - writel(0x0, dbi_base + PCIE_PHY_CTRL); + dw_pcie_writel_rc(pp, PCIE_PHY_CTRL, 0x0); return 0; } @@ -284,10 +284,10 @@ static int imx6_pcie_assert_core_reset(struct imx6_pcie *imx6_pcie) if ((gpr1 & IMX6Q_GPR1_PCIE_REF_CLK_EN) && (gpr12 & IMX6Q_GPR12_PCIE_CTL_2)) { - val = readl(pp->dbi_base + PCIE_PL_PFLR); + val = dw_pcie_readl_rc(pp, PCIE_PL_PFLR); val &= ~PCIE_PL_PFLR_LINK_STATE_MASK; val |= PCIE_PL_PFLR_FORCE_LINK; - writel(val, pp->dbi_base + PCIE_PL_PFLR); + dw_pcie_writel_rc(pp, PCIE_PL_PFLR, val); regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR12, IMX6Q_GPR12_PCIE_CTL_2, 0 << 10); @@ -452,8 +452,8 @@ static int imx6_pcie_wait_for_link(struct imx6_pcie *imx6_pcie) return 0; dev_dbg(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)); + dw_pcie_readl_rc(pp, PCIE_PHY_DEBUG_R0), + dw_pcie_readl_rc(pp, PCIE_PHY_DEBUG_R1)); return -ETIMEDOUT; } @@ -465,7 +465,7 @@ static int imx6_pcie_wait_for_speed_change(struct imx6_pcie *imx6_pcie) unsigned int retries; for (retries = 0; retries < 200; retries++) { - tmp = readl(pp->dbi_base + PCIE_LINK_WIDTH_SPEED_CONTROL); + tmp = dw_pcie_readl_rc(pp, PCIE_LINK_WIDTH_SPEED_CONTROL); /* Test if the speed change finished. */ if (!(tmp & PORT_LOGIC_SPEED_CHANGE)) return 0; @@ -496,10 +496,10 @@ static int imx6_pcie_establish_link(struct imx6_pcie *imx6_pcie) * started in Gen2 mode, there is a possibility the devices on the * bus will not be detected at all. This happens with PCIe switches. */ - tmp = readl(pp->dbi_base + PCIE_RC_LCR); + tmp = dw_pcie_readl_rc(pp, PCIE_RC_LCR); tmp &= ~PCIE_RC_LCR_MAX_LINK_SPEEDS_MASK; tmp |= PCIE_RC_LCR_MAX_LINK_SPEEDS_GEN1; - writel(tmp, pp->dbi_base + PCIE_RC_LCR); + dw_pcie_writel_rc(pp, PCIE_RC_LCR, tmp); /* Start LTSSM. */ regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR12, @@ -513,10 +513,10 @@ static int imx6_pcie_establish_link(struct imx6_pcie *imx6_pcie) if (imx6_pcie->link_gen == 2) { /* Allow Gen2 mode after the link is up. */ - tmp = readl(pp->dbi_base + PCIE_RC_LCR); + tmp = dw_pcie_readl_rc(pp, PCIE_RC_LCR); tmp &= ~PCIE_RC_LCR_MAX_LINK_SPEEDS_MASK; tmp |= PCIE_RC_LCR_MAX_LINK_SPEEDS_GEN2; - writel(tmp, pp->dbi_base + PCIE_RC_LCR); + dw_pcie_writel_rc(pp, PCIE_RC_LCR, tmp); } else { dev_info(dev, "Link: Gen2 disabled\n"); } @@ -525,9 +525,9 @@ static int imx6_pcie_establish_link(struct imx6_pcie *imx6_pcie) * Start Directed Speed Change so the best possible speed both link * partners support can be negotiated. */ - tmp = readl(pp->dbi_base + PCIE_LINK_WIDTH_SPEED_CONTROL); + tmp = dw_pcie_readl_rc(pp, PCIE_LINK_WIDTH_SPEED_CONTROL); tmp |= PORT_LOGIC_SPEED_CHANGE; - writel(tmp, pp->dbi_base + PCIE_LINK_WIDTH_SPEED_CONTROL); + dw_pcie_writel_rc(pp, PCIE_LINK_WIDTH_SPEED_CONTROL, tmp); ret = imx6_pcie_wait_for_speed_change(imx6_pcie); if (ret) { @@ -542,16 +542,15 @@ static int imx6_pcie_establish_link(struct imx6_pcie *imx6_pcie) goto err_reset_phy; } - tmp = readl(pp->dbi_base + PCIE_RC_LCSR); + tmp = dw_pcie_readl_rc(pp, PCIE_RC_LCSR); dev_info(dev, "Link up, Gen%i\n", (tmp >> 16) & 0xf); return 0; err_reset_phy: dev_dbg(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); - + dw_pcie_readl_rc(pp, PCIE_PHY_DEBUG_R0), + dw_pcie_readl_rc(pp, PCIE_PHY_DEBUG_R1)); + imx6_pcie_reset_phy(imx6_pcie); return ret; } @@ -571,7 +570,7 @@ static void imx6_pcie_host_init(struct pcie_port *pp) static int imx6_pcie_link_up(struct pcie_port *pp) { - return readl(pp->dbi_base + PCIE_PHY_DEBUG_R1) & + return dw_pcie_readl_rc(pp, PCIE_PHY_DEBUG_R1) & PCIE_PHY_DEBUG_R1_XMLH_LINK_UP; } -- cgit v1.2.3