[RFC 25/27] PCI: dwc/qcom: Use common PCI register definitions

[Rob Herring <robh@kernel.org>]

The QCom driver has its own defines for common PCI config space
registers. It also hard codes the capability register offsets which are
discoverable. Convert it to use the standard register definitions.

Cc: Stanimir Varbanov <svarbanov@mm-sol.com>
Cc: Andy Gross <agross@kernel.org>
Cc: Bjorn Andersson <bjorn.andersson@linaro.org>
Cc: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Cc: Bjorn Helgaas <bhelgaas@google.com>
Cc: linux-pci@vger.kernel.org
Cc: linux-arm-msm@vger.kernel.org
Signed-off-by: Rob Herring <robh@kernel.org>
---
 drivers/pci/controller/dwc/pcie-qcom.c | 27 ++++++++++----------------
 1 file changed, 10 insertions(+), 17 deletions(-)

diff --git a/drivers/pci/controller/dwc/pcie-qcom.c b/drivers/pci/controller/dwc/pcie-qcom.c
index 9f1d3ba686fa..dba5f7d7f727 100644
--- a/drivers/pci/controller/dwc/pcie-qcom.c
+++ b/drivers/pci/controller/dwc/pcie-qcom.c
@@ -39,11 +39,6 @@
 #define L23_CLK_RMV_DIS				BIT(2)
 #define L1_CLK_RMV_DIS				BIT(1)
 
-#define PCIE20_COMMAND_STATUS			0x04
-#define CMD_BME_VAL				0x4
-#define PCIE20_DEVICE_CONTROL2_STATUS2		0x98
-#define PCIE_CAP_CPL_TIMEOUT_DISABLE		0x10
-
 #define PCIE20_PARF_PHY_CTRL			0x40
 #define PCIE20_PARF_PHY_REFCLK			0x4C
 #define PCIE20_PARF_DBI_BASE_ADDR		0x168
@@ -65,10 +60,6 @@
 #define PCIE20_AXI_MSTR_RESP_COMP_CTRL1		0x81c
 #define CFG_BRIDGE_SB_INIT			BIT(0)
 
-#define PCIE20_CAP				0x70
-#define PCIE20_CAP_LINK_CAPABILITIES		(PCIE20_CAP + 0xC)
-#define PCIE20_CAP_ACTIVE_STATE_LINK_PM_SUPPORT	(BIT(10) | BIT(11))
-#define PCIE20_CAP_LINK_1			(PCIE20_CAP + 0x14)
 #define PCIE_CAP_LINK1_VAL			0x2FD7F
 
 #define PCIE20_PARF_Q2A_FLUSH			0x1AC
@@ -974,6 +965,7 @@ static int qcom_pcie_init_2_3_3(struct qcom_pcie *pcie)
 	struct qcom_pcie_resources_2_3_3 *res = &pcie->res.v2_3_3;
 	struct dw_pcie *pci = pcie->pci;
 	struct device *dev = pci->dev;
+	u16 offset = dw_pcie_find_capability(pci, PCI_CAP_ID_EXP);
 	int i, ret;
 	u32 val;
 
@@ -1047,16 +1039,16 @@ static int qcom_pcie_init_2_3_3(struct qcom_pcie *pcie)
 		pcie->parf + PCIE20_PARF_SYS_CTRL);
 	writel(0, pcie->parf + PCIE20_PARF_Q2A_FLUSH);
 
-	writel(CMD_BME_VAL, pci->dbi_base + PCIE20_COMMAND_STATUS);
+	writel(PCI_COMMAND_MASTER, pci->dbi_base + PCI_COMMAND);
 	writel(DBI_RO_WR_EN, pci->dbi_base + PCIE20_MISC_CONTROL_1_REG);
-	writel(PCIE_CAP_LINK1_VAL, pci->dbi_base + PCIE20_CAP_LINK_1);
+	writel(PCIE_CAP_LINK1_VAL, pci->dbi_base + offset + PCI_EXP_SLTCAP);
 
-	val = readl(pci->dbi_base + PCIE20_CAP_LINK_CAPABILITIES);
-	val &= ~PCIE20_CAP_ACTIVE_STATE_LINK_PM_SUPPORT;
-	writel(val, pci->dbi_base + PCIE20_CAP_LINK_CAPABILITIES);
+	val = readl(pci->dbi_base + offset + PCI_EXP_LNKCAP);
+	val &= ~PCI_EXP_LNKCAP_ASPMS;
+	writel(val, pci->dbi_base + offset + PCI_EXP_LNKCAP);
 
-	writel(PCIE_CAP_CPL_TIMEOUT_DISABLE, pci->dbi_base +
-		PCIE20_DEVICE_CONTROL2_STATUS2);
+	writel(PCI_EXP_DEVCTL2_COMP_TMOUT_DIS, pci->dbi_base + offset +
+		PCI_EXP_DEVCTL2);
 
 	return 0;
 
@@ -1209,7 +1201,8 @@ static void qcom_pcie_post_deinit_2_7_0(struct qcom_pcie *pcie)
 
 static int qcom_pcie_link_up(struct dw_pcie *pci)
 {
-	u16 val = readw(pci->dbi_base + PCIE20_CAP + PCI_EXP_LNKSTA);
+	u16 offset = dw_pcie_find_capability(pci, PCI_CAP_ID_EXP);
+	u16 val = readw(pci->dbi_base + offset + PCI_EXP_LNKSTA);
 
 	return !!(val & PCI_EXP_LNKSTA_DLLLA);
 }
-- 
2.25.1