The Qualcomm specific dwc3 wrapper isn't hugely complicated, implemented the missing initialisation for host and gadget mode.
Reviewed-by: Mattijs Korpershoek mkorpershoek@baylibre.com Reviewed-by: Marek Vasut marex@denx.de Reviewed-by: Neil Armstrong neil.armstrong@linaro.org Signed-off-by: Caleb Connolly caleb.connolly@linaro.org --- drivers/usb/dwc3/dwc3-generic.c | 81 ++++++++++++++++++++++++++++++++++++++++- 1 file changed, 80 insertions(+), 1 deletion(-)
diff --git a/drivers/usb/dwc3/dwc3-generic.c b/drivers/usb/dwc3/dwc3-generic.c index a379a0002e77..7a00529a2a8e 100644 --- a/drivers/usb/dwc3/dwc3-generic.c +++ b/drivers/usb/dwc3/dwc3-generic.c @@ -424,8 +424,79 @@ enum dwc3_omap_utmi_mode { struct dwc3_glue_ops ti_ops = { .glue_configure = dwc3_ti_glue_configure, };
+/* USB QSCRATCH Hardware registers */ +#define QSCRATCH_GENERAL_CFG 0x08 +#define PIPE_UTMI_CLK_SEL BIT(0) +#define PIPE3_PHYSTATUS_SW BIT(3) +#define PIPE_UTMI_CLK_DIS BIT(8) + +#define QSCRATCH_HS_PHY_CTRL 0x10 +#define UTMI_OTG_VBUS_VALID BIT(20) +#define SW_SESSVLD_SEL BIT(28) + +#define QSCRATCH_SS_PHY_CTRL 0x30 +#define LANE0_PWR_PRESENT BIT(24) + +#define PWR_EVNT_IRQ_STAT_REG 0x58 +#define PWR_EVNT_LPM_IN_L2_MASK BIT(4) +#define PWR_EVNT_LPM_OUT_L2_MASK BIT(5) + +#define SDM845_QSCRATCH_BASE_OFFSET 0xf8800 +#define SDM845_QSCRATCH_SIZE 0x400 +#define SDM845_DWC3_CORE_SIZE 0xcd00 + +static void dwc3_qcom_vbus_override_enable(void __iomem *qscratch_base, bool enable) +{ + if (enable) { + setbits_le32(qscratch_base + QSCRATCH_SS_PHY_CTRL, + LANE0_PWR_PRESENT); + setbits_le32(qscratch_base + QSCRATCH_HS_PHY_CTRL, + UTMI_OTG_VBUS_VALID | SW_SESSVLD_SEL); + } else { + clrbits_le32(qscratch_base + QSCRATCH_SS_PHY_CTRL, + LANE0_PWR_PRESENT); + clrbits_le32(qscratch_base + QSCRATCH_HS_PHY_CTRL, + UTMI_OTG_VBUS_VALID | SW_SESSVLD_SEL); + } +} + +/* For controllers running without superspeed PHYs */ +static void dwc3_qcom_select_utmi_clk(void __iomem *qscratch_base) +{ + /* Configure dwc3 to use UTMI clock as PIPE clock not present */ + setbits_le32(qscratch_base + QSCRATCH_GENERAL_CFG, + PIPE_UTMI_CLK_DIS); + + setbits_le32(qscratch_base + QSCRATCH_GENERAL_CFG, + PIPE_UTMI_CLK_SEL | PIPE3_PHYSTATUS_SW); + + clrbits_le32(qscratch_base + QSCRATCH_GENERAL_CFG, + PIPE_UTMI_CLK_DIS); +} + +static void dwc3_qcom_glue_configure(struct udevice *dev, int index, + enum usb_dr_mode mode) +{ + struct dwc3_glue_data *glue = dev_get_plat(dev); + void __iomem *qscratch_base = map_physmem(glue->regs, 0x400, MAP_NOCACHE); + if (IS_ERR_OR_NULL(qscratch_base)) { + log_err("%s: Invalid qscratch base address\n", dev->name); + return; + } + + if (dev_read_bool(dev, "qcom,select-utmi-as-pipe-clk")) + dwc3_qcom_select_utmi_clk(qscratch_base); + + if (mode != USB_DR_MODE_HOST) + dwc3_qcom_vbus_override_enable(qscratch_base, true); +} + +struct dwc3_glue_ops qcom_ops = { + .glue_configure = dwc3_qcom_glue_configure, +}; + static int dwc3_rk_glue_get_ctrl_dev(struct udevice *dev, ofnode *node) { *node = dev_ofnode(dev); if (!ofnode_valid(*node)) @@ -511,8 +582,16 @@ static int dwc3_glue_reset_init(struct udevice *dev, return 0; else if (ret) return ret;
+ if (device_is_compatible(dev, "qcom,dwc3")) { + reset_assert_bulk(&glue->resets); + /* We should wait at least 6 sleep clock cycles, that's + * (6 / 32764) * 1000000 ~= 200us. But some platforms + * have slower sleep clocks so we'll play it safe. + */ + udelay(500); + } ret = reset_deassert_bulk(&glue->resets); if (ret) { reset_release_bulk(&glue->resets); return ret; @@ -628,9 +707,9 @@ static const struct udevice_id dwc3_glue_ids[] = { { .compatible = "rockchip,rk3328-dwc3", .data = (ulong)&rk_ops }, { .compatible = "rockchip,rk3399-dwc3" }, { .compatible = "rockchip,rk3568-dwc3", .data = (ulong)&rk_ops }, { .compatible = "rockchip,rk3588-dwc3", .data = (ulong)&rk_ops }, - { .compatible = "qcom,dwc3" }, + { .compatible = "qcom,dwc3", .data = (ulong)&qcom_ops }, { .compatible = "fsl,imx8mp-dwc3", .data = (ulong)&imx8mp_ops }, { .compatible = "fsl,imx8mq-dwc3" }, { .compatible = "intel,tangier-dwc3" }, { }