+++ /dev/null
---- 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 {
-@@ -106,20 +152,10 @@ writel_masked(void __iomem *addr, u32 cl
-
- static void qcom_ep_reset_assert_deassert(struct qcom_pcie *pcie, int assert)
- {
-- int val, active_low;
--
- if (IS_ERR_OR_NULL(pcie->reset))
- return;
-
-- active_low = gpiod_is_active_low(pcie->reset);
--
-- if (assert)
-- val = !!active_low;
-- else
-- val = !active_low;
--
-- gpiod_set_value(pcie->reset, val);
--
-+ gpiod_set_value(pcie->reset, assert);
- usleep_range(PERST_DELAY_MIN_US, PERST_DELAY_MAX_US);
- }
-
-@@ -156,10 +192,13 @@ 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 +240,12 @@ 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");
-@@ -219,21 +264,40 @@ 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");
- goto err_reset_ahb;
- }
-+ udelay(1);
-
- 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 +393,14 @@ 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 +421,14 @@ 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 +541,57 @@ 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);
-@@ -470,15 +601,34 @@ static void qcom_pcie_host_init_v0(struc
-
- qcom_ep_reset_assert(pcie);
-
-+ reset_control_assert(res->ahb_reset);
-+
- ret = qcom_pcie_enable_resources_v0(pcie);
- if (ret)
- return;
-
- 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 +667,9 @@ 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);
projects / openwrt / staging / lynxis / omap.git / blobdiff