diff --git a/drivers/usb/host/Kconfig b/drivers/usb/host/Kconfig index b4dd005651cf923bbd59efaa9a07ec0143557f9c..1f4b265061d48431197fb789bd25d40592bff4f4 100644 --- a/drivers/usb/host/Kconfig +++ b/drivers/usb/host/Kconfig @@ -94,6 +94,14 @@ config USB_XHCI_FSL depends on !SPL_NO_USB help Enables support for the on-chip xHCI controller on NXP Layerscape SoCs. + +config USB_XHCI_IMX8M + bool "XHCI support for imx8M(mscale)" + depends on ARCH_MX8M + default y + help + Enables support for the on-chip xHCI controller on imx8m(mscale) SoC. + endif # USB_XHCI_HCD config USB_EHCI_HCD diff --git a/drivers/usb/host/Makefile b/drivers/usb/host/Makefile index cb8c315a1510e57c6d19bcf5475f89ad65b59b8d..1f3b7c9a645ce06a42a477cbf701f176f2345da4 100644 --- a/drivers/usb/host/Makefile +++ b/drivers/usb/host/Makefile @@ -58,6 +58,7 @@ obj-$(CONFIG_USB_XHCI_OMAP) += xhci-omap.o obj-$(CONFIG_USB_XHCI_PCI) += xhci-pci.o obj-$(CONFIG_USB_XHCI_RCAR) += xhci-rcar.o obj-$(CONFIG_USB_XHCI_STI) += dwc3-sti-glue.o +obj-$(CONFIG_USB_XHCI_IMX8M) += xhci-imx8m.o # designware obj-$(CONFIG_USB_DWC2) += dwc2.o diff --git a/drivers/usb/host/xhci-imx8m.c b/drivers/usb/host/xhci-imx8m.c new file mode 100644 index 0000000000000000000000000000000000000000..1c63550a8f6c9f57e0016266384042328ed1e522 --- /dev/null +++ b/drivers/usb/host/xhci-imx8m.c @@ -0,0 +1,140 @@ +/* + * Copyright 2017 NXP + * + * FSL i.MX8M USB HOST xHCI Controller + * + * Author: Jun Li <jun.li@nxp.com> + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include <common.h> +#include <usb.h> +#include <linux/errno.h> +#include <linux/compat.h> +#include <linux/usb/dwc3.h> +#include "xhci.h" + +/* Declare global data pointer */ +DECLARE_GLOBAL_DATA_PTR; + +#define USBMIX_PHY_OFFSET 0xF0040 + +#define PHY_CTRL0_REF_SSP_EN BIT(2) + +#define PHY_CTRL1_RESET BIT(0) +#define PHY_CTRL1_ATERESET BIT(3) +#define PHY_CTRL1_VDATSRCENB0 BIT(19) +#define PHY_CTRL1_VDATDETENB0 BIT(20) + +#define PHY_CTRL2_TXENABLEN0 BIT(8) + +struct imx8m_usbmix { + u32 phy_ctrl0; + u32 phy_ctrl1; + u32 phy_ctrl2; + u32 phy_ctrl3; +}; + +struct imx8m_xhci { + struct xhci_hccr *hcd; + struct dwc3 *dwc3_reg; + struct imx8m_usbmix *usbmix_reg; +}; + +static struct imx8m_xhci imx8m_xhci; +unsigned long ctr_addr[] = {USB2_BASE_ADDR}; + +static void imx8m_usb_phy_init(struct imx8m_usbmix *usbmix_reg) +{ + u32 reg; + + reg = readl(&usbmix_reg->phy_ctrl1); + reg &= ~(PHY_CTRL1_VDATSRCENB0 | PHY_CTRL1_VDATDETENB0); + reg |= PHY_CTRL1_RESET | PHY_CTRL1_ATERESET; + writel(reg, &usbmix_reg->phy_ctrl1); + + reg = readl(&usbmix_reg->phy_ctrl0); + reg |= PHY_CTRL0_REF_SSP_EN; + writel(reg, &usbmix_reg->phy_ctrl0); + + reg = readl(&usbmix_reg->phy_ctrl2); + reg |= PHY_CTRL2_TXENABLEN0; + writel(reg, &usbmix_reg->phy_ctrl2); + + reg = readl(&usbmix_reg->phy_ctrl1); + reg &= ~(PHY_CTRL1_RESET | PHY_CTRL1_ATERESET); + writel(reg, &usbmix_reg->phy_ctrl1); +} + +static void imx8m_xhci_set_suspend_clk(struct dwc3 *dwc3_reg) +{ + u32 reg; + + /* Set suspend_clk to be 32KHz */ + reg = readl(&dwc3_reg->g_ctl); + reg &= ~(DWC3_GCTL_PWRDNSCALE_MASK); + reg |= DWC3_GCTL_PWRDNSCALE(2); + + writel(reg, &dwc3_reg->g_ctl); +} + +static int imx8m_xhci_core_init(struct imx8m_xhci *imx8m_xhci) +{ + int ret = 0; + + imx8m_usb_phy_init(imx8m_xhci->usbmix_reg); + + ret = dwc3_core_init(imx8m_xhci->dwc3_reg); + if (ret) { + debug("%s:failed to initialize core\n", __func__); + return ret; + } + + imx8m_xhci_set_suspend_clk(imx8m_xhci->dwc3_reg); + + /* We are hard-coding DWC3 core to Host Mode */ + dwc3_set_mode(imx8m_xhci->dwc3_reg, DWC3_GCTL_PRTCAP_HOST); + + /* Set GFLADJ_30MHZ as 20h as per XHCI spec default value */ + dwc3_set_fladj(imx8m_xhci->dwc3_reg, GFLADJ_30MHZ_DEFAULT); + + return ret; +} + +int xhci_hcd_init(int index, struct xhci_hccr **hccr, struct xhci_hcor **hcor) +{ + struct imx8m_xhci *ctx = &imx8m_xhci; + int ret = 0; + + ctx->hcd = (struct xhci_hccr *)ctr_addr[index]; + ctx->dwc3_reg = (struct dwc3 *)((char *)(ctx->hcd) + DWC3_REG_OFFSET); + ctx->usbmix_reg = (struct imx8m_usbmix *)((char *)(ctx->hcd) + + USBMIX_PHY_OFFSET); + + ret = board_usb_init(index, USB_INIT_HOST); + if (ret != 0) { + puts("Failed to initialize board for imx8m USB\n"); + return ret; + } + + ret = imx8m_xhci_core_init(ctx); + if (ret < 0) { + puts("Failed to initialize imx8m xhci\n"); + return ret; + } + + *hccr = (struct xhci_hccr *)ctx->hcd; + *hcor = (struct xhci_hcor *)((uintptr_t) *hccr + + HC_LENGTH(xhci_readl(&(*hccr)->cr_capbase))); + + debug("imx8m-xhci: init hccr %lx and hcor %lx hc_length %lx\n", + (uintptr_t)*hccr, (uintptr_t)*hcor, + (uintptr_t)HC_LENGTH(xhci_readl(&(*hccr)->cr_capbase))); + + return ret; +} + +void xhci_hcd_stop(int index) +{ +} diff --git a/include/linux/usb/dwc3.h b/include/linux/usb/dwc3.h index 9ceee0a1c9f6eb61dd349a725a89276959c73747..c63a5f34c0ce25588f3f991da99f2cdb2aa7df2d 100644 --- a/include/linux/usb/dwc3.h +++ b/include/linux/usb/dwc3.h @@ -154,6 +154,7 @@ struct dwc3 { /* offset: 0xC100 */ /* Global Configuration Register */ #define DWC3_GCTL_PWRDNSCALE(n) ((n) << 19) +#define DWC3_GCTL_PWRDNSCALE_MASK DWC3_GCTL_PWRDNSCALE(0x1fff) #define DWC3_GCTL_U2RSTECN (1 << 16) #define DWC3_GCTL_RAMCLKSEL(x) \ (((x) & DWC3_GCTL_CLK_MASK) << 6)