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|
--- a/drivers/pci/host/pcie-qcom.c
+++ b/drivers/pci/host/pcie-qcom.c
@@ -29,8 +29,53 @@
#include "pcie-designware.h"
+/* DBI registers */
+#define PCIE20_CAP 0x70
+#define PCIE20_CAP_LINKCTRLSTATUS (PCIE20_CAP + 0x10)
+
+#define PCIE20_AXI_MSTR_RESP_COMP_CTRL0 0x818
+#define PCIE20_AXI_MSTR_RESP_COMP_CTRL1 0x81c
+
+#define PCIE20_PLR_IATU_VIEWPORT 0x900
+#define PCIE20_PLR_IATU_REGION_OUTBOUND (0x0 << 31)
+#define PCIE20_PLR_IATU_REGION_INDEX(x) (x << 0)
+
+#define PCIE20_PLR_IATU_CTRL1 0x904
+#define PCIE20_PLR_IATU_TYPE_CFG0 (0x4 << 0)
+#define PCIE20_PLR_IATU_TYPE_MEM (0x0 << 0)
+
+#define PCIE20_PLR_IATU_CTRL2 0x908
+#define PCIE20_PLR_IATU_ENABLE BIT(31)
+
+#define PCIE20_PLR_IATU_LBAR 0x90C
+#define PCIE20_PLR_IATU_UBAR 0x910
+#define PCIE20_PLR_IATU_LAR 0x914
+#define PCIE20_PLR_IATU_LTAR 0x918
+#define PCIE20_PLR_IATU_UTAR 0x91c
+
+#define MSM_PCIE_DEV_CFG_ADDR 0x01000000
+
+/* PARF registers */
+#define PCIE20_PARF_PCS_DEEMPH 0x34
+#define PCS_DEEMPH_TX_DEEMPH_GEN1(x) (x << 16)
+#define PCS_DEEMPH_TX_DEEMPH_GEN2_3_5DB(x) (x << 8)
+#define PCS_DEEMPH_TX_DEEMPH_GEN2_6DB(x) (x << 0)
+
+#define PCIE20_PARF_PCS_SWING 0x38
+#define PCS_SWING_TX_SWING_FULL(x) (x << 8)
+#define PCS_SWING_TX_SWING_LOW(x) (x << 0)
+
#define PCIE20_PARF_PHY_CTRL 0x40
+#define PHY_CTRL_PHY_TX0_TERM_OFFSET_MASK (0x1f << 16)
+#define PHY_CTRL_PHY_TX0_TERM_OFFSET(x) (x << 16)
+
#define PCIE20_PARF_PHY_REFCLK 0x4C
+#define REF_SSP_EN BIT(16)
+#define REF_USE_PAD BIT(12)
+
+#define PCIE20_PARF_CONFIG_BITS 0x50
+#define PHY_RX0_EQ(x) (x << 24)
+
#define PCIE20_PARF_DBI_BASE_ADDR 0x168
#define PCIE20_PARF_SLV_ADDR_SPACE_SIZE 0x16c
#define PCIE20_PARF_AXI_MSTR_WR_ADDR_HALT 0x178
@@ -39,9 +84,6 @@
#define PCIE20_ELBI_SYS_STTS 0x08
#define XMLH_LINK_UP BIT(10)
-#define PCIE20_CAP 0x70
-#define PCIE20_CAP_LINKCTRLSTATUS (PCIE20_CAP + 0x10)
-
#define PERST_DELAY_MIN_US 1000
#define PERST_DELAY_MAX_US 1005
@@ -56,14 +98,18 @@ struct qcom_pcie_resources_v0 {
struct clk *iface_clk;
struct clk *core_clk;
struct clk *phy_clk;
+ struct clk *aux_clk;
+ struct clk *ref_clk;
struct reset_control *pci_reset;
struct reset_control *axi_reset;
struct reset_control *ahb_reset;
struct reset_control *por_reset;
struct reset_control *phy_reset;
+ struct reset_control *ext_reset;
struct regulator *vdda;
struct regulator *vdda_phy;
struct regulator *vdda_refclk;
+ uint8_t phy_tx0_term_offset;
};
struct qcom_pcie_resources_v1 {
@@ -156,10 +202,13 @@ static void qcom_pcie_disable_resources_
reset_control_assert(res->axi_reset);
reset_control_assert(res->ahb_reset);
reset_control_assert(res->por_reset);
- reset_control_assert(res->pci_reset);
+ reset_control_assert(res->phy_reset);
+ reset_control_assert(res->ext_reset);
clk_disable_unprepare(res->iface_clk);
clk_disable_unprepare(res->core_clk);
clk_disable_unprepare(res->phy_clk);
+ clk_disable_unprepare(res->aux_clk);
+ clk_disable_unprepare(res->ref_clk);
regulator_disable(res->vdda);
regulator_disable(res->vdda_phy);
regulator_disable(res->vdda_refclk);
@@ -201,6 +250,12 @@ static int qcom_pcie_enable_resources_v0
goto err_vdda_phy;
}
+ ret = reset_control_deassert(res->ext_reset);
+ if (ret) {
+ dev_err(dev, "cannot assert ext reset\n");
+ goto err_reset_ext;
+ }
+
ret = clk_prepare_enable(res->iface_clk);
if (ret) {
dev_err(dev, "cannot prepare/enable iface clock\n");
@@ -219,6 +274,18 @@ static int qcom_pcie_enable_resources_v0
goto err_clk_phy;
}
+ ret = clk_prepare_enable(res->aux_clk);
+ if (ret) {
+ dev_err(dev, "cannot prepare/enable aux clock\n");
+ goto err_clk_aux;
+ }
+
+ ret = clk_prepare_enable(res->ref_clk);
+ if (ret) {
+ dev_err(dev, "cannot prepare/enable ref clock\n");
+ goto err_clk_ref;
+ }
+
ret = reset_control_deassert(res->ahb_reset);
if (ret) {
dev_err(dev, "cannot deassert ahb reset\n");
@@ -228,12 +295,18 @@ static int qcom_pcie_enable_resources_v0
return 0;
err_reset_ahb:
+ clk_disable_unprepare(res->ref_clk);
+err_clk_ref:
+ clk_disable_unprepare(res->aux_clk);
+err_clk_aux:
clk_disable_unprepare(res->phy_clk);
err_clk_phy:
clk_disable_unprepare(res->core_clk);
err_clk_core:
clk_disable_unprepare(res->iface_clk);
err_iface:
+ reset_control_assert(res->ext_reset);
+err_reset_ext:
regulator_disable(res->vdda_phy);
err_vdda_phy:
regulator_disable(res->vdda_refclk);
@@ -329,6 +402,14 @@ static int qcom_pcie_get_resources_v0(st
if (IS_ERR(res->phy_clk))
return PTR_ERR(res->phy_clk);
+ res->aux_clk = devm_clk_get(dev, "aux");
+ if (IS_ERR(res->aux_clk))
+ return PTR_ERR(res->aux_clk);
+
+ res->ref_clk = devm_clk_get(dev, "ref");
+ if (IS_ERR(res->ref_clk))
+ return PTR_ERR(res->ref_clk);
+
res->pci_reset = devm_reset_control_get(dev, "pci");
if (IS_ERR(res->pci_reset))
return PTR_ERR(res->pci_reset);
@@ -349,6 +430,14 @@ static int qcom_pcie_get_resources_v0(st
if (IS_ERR(res->phy_reset))
return PTR_ERR(res->phy_reset);
+ res->ext_reset = devm_reset_control_get(dev, "ext");
+ if (IS_ERR(res->ext_reset))
+ return PTR_ERR(res->ext_reset);
+
+ if (of_property_read_u8(dev->of_node, "phy-tx0-term-offset",
+ &res->phy_tx0_term_offset))
+ res->phy_tx0_term_offset = 0;
+
return 0;
}
@@ -461,6 +550,57 @@ err_res:
qcom_pcie_disable_resources_v1(pcie);
}
+static void qcom_pcie_prog_viewport_cfg0(struct qcom_pcie *pcie, u32 busdev)
+{
+ struct pcie_port *pp = &pcie->pp;
+
+ /*
+ * program and enable address translation region 0 (device config
+ * address space); region type config;
+ * axi config address range to device config address range
+ */
+ writel(PCIE20_PLR_IATU_REGION_OUTBOUND |
+ PCIE20_PLR_IATU_REGION_INDEX(0),
+ pcie->dbi + PCIE20_PLR_IATU_VIEWPORT);
+
+ writel(PCIE20_PLR_IATU_TYPE_CFG0, pcie->dbi + PCIE20_PLR_IATU_CTRL1);
+ writel(PCIE20_PLR_IATU_ENABLE, pcie->dbi + PCIE20_PLR_IATU_CTRL2);
+ writel(pp->cfg0_mod_base, pcie->dbi + PCIE20_PLR_IATU_LBAR);
+ writel((pp->cfg0_mod_base >> 32), pcie->dbi + PCIE20_PLR_IATU_UBAR);
+ writel((pp->cfg0_mod_base + pp->cfg0_size - 1),
+ pcie->dbi + PCIE20_PLR_IATU_LAR);
+ writel(busdev, pcie->dbi + PCIE20_PLR_IATU_LTAR);
+ writel(0, pcie->dbi + PCIE20_PLR_IATU_UTAR);
+}
+
+static void qcom_pcie_prog_viewport_mem2_outbound(struct qcom_pcie *pcie)
+{
+ struct pcie_port *pp = &pcie->pp;
+
+ /*
+ * program and enable address translation region 2 (device resource
+ * address space); region type memory;
+ * axi device bar address range to device bar address range
+ */
+ writel(PCIE20_PLR_IATU_REGION_OUTBOUND |
+ PCIE20_PLR_IATU_REGION_INDEX(2),
+ pcie->dbi + PCIE20_PLR_IATU_VIEWPORT);
+
+ writel(PCIE20_PLR_IATU_TYPE_MEM, pcie->dbi + PCIE20_PLR_IATU_CTRL1);
+ writel(PCIE20_PLR_IATU_ENABLE, pcie->dbi + PCIE20_PLR_IATU_CTRL2);
+ writel(pp->mem_mod_base, pcie->dbi + PCIE20_PLR_IATU_LBAR);
+ writel((pp->mem_mod_base >> 32), pcie->dbi + PCIE20_PLR_IATU_UBAR);
+ writel(pp->mem_mod_base + pp->mem_size - 1,
+ pcie->dbi + PCIE20_PLR_IATU_LAR);
+ writel(pp->mem_bus_addr, pcie->dbi + PCIE20_PLR_IATU_LTAR);
+ writel(upper_32_bits(pp->mem_bus_addr),
+ pcie->dbi + PCIE20_PLR_IATU_UTAR);
+
+ /* 256B PCIE buffer setting */
+ writel(0x1, pcie->dbi + PCIE20_AXI_MSTR_RESP_COMP_CTRL0);
+ writel(0x1, pcie->dbi + PCIE20_AXI_MSTR_RESP_COMP_CTRL1);
+}
+
static void qcom_pcie_host_init_v0(struct pcie_port *pp)
{
struct qcom_pcie *pcie = to_qcom_pcie(pp);
@@ -476,9 +616,26 @@ static void qcom_pcie_host_init_v0(struc
writel_masked(pcie->parf + PCIE20_PARF_PHY_CTRL, BIT(0), 0);
- /* enable external reference clock */
- writel_masked(pcie->parf + PCIE20_PARF_PHY_REFCLK, 0, BIT(16));
+ /* Set Tx termination offset */
+ writel_masked(pcie->parf + PCIE20_PARF_PHY_CTRL,
+ PHY_CTRL_PHY_TX0_TERM_OFFSET_MASK,
+ PHY_CTRL_PHY_TX0_TERM_OFFSET(res->phy_tx0_term_offset));
+
+ /* PARF programming */
+ writel(PCS_DEEMPH_TX_DEEMPH_GEN1(0x18) |
+ PCS_DEEMPH_TX_DEEMPH_GEN2_3_5DB(0x18) |
+ PCS_DEEMPH_TX_DEEMPH_GEN2_6DB(0x22),
+ pcie->parf + PCIE20_PARF_PCS_DEEMPH);
+ writel(PCS_SWING_TX_SWING_FULL(0x78) |
+ PCS_SWING_TX_SWING_LOW(0x78),
+ pcie->parf + PCIE20_PARF_PCS_SWING);
+ writel(PHY_RX0_EQ(0x4), pcie->parf + PCIE20_PARF_CONFIG_BITS);
+
+ /* Enable reference clock */
+ writel_masked(pcie->parf + PCIE20_PARF_PHY_REFCLK,
+ REF_USE_PAD, REF_SSP_EN);
+ /* De-assert PHY, PCIe, POR and AXI resets */
ret = reset_control_deassert(res->phy_reset);
if (ret) {
dev_err(dev, "cannot deassert phy reset\n");
@@ -517,6 +674,9 @@ static void qcom_pcie_host_init_v0(struc
if (ret)
goto err;
+ qcom_pcie_prog_viewport_cfg0(pcie, MSM_PCIE_DEV_CFG_ADDR);
+ qcom_pcie_prog_viewport_mem2_outbound(pcie);
+
return;
err:
qcom_ep_reset_assert(pcie);
|
