/* * SAMSUNG EXYNOS USB HOST EHCI Controller * * Copyright (C) 2012 Samsung Electronics Co.Ltd * Vivek Gautam * * SPDX-License-Identifier: GPL-2.0+ */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include "ehci.h" /* Declare global data pointer */ DECLARE_GLOBAL_DATA_PTR; struct exynos_ehci_platdata { struct usb_platdata usb_plat; fdt_addr_t hcd_base; fdt_addr_t phy_base; struct gpio_desc vbus_gpio; }; /** * Contains pointers to register base addresses * for the usb controller. */ struct exynos_ehci { struct ehci_ctrl ctrl; struct exynos_usb_phy *usb; struct ehci_hccr *hcd; }; static int ehci_usb_ofdata_to_platdata(struct udevice *dev) { struct exynos_ehci_platdata *plat = dev_get_platdata(dev); const void *blob = gd->fdt_blob; unsigned int node; int depth; /* * Get the base address for XHCI controller from the device node */ plat->hcd_base = dev_get_addr(dev); if (plat->hcd_base == FDT_ADDR_T_NONE) { debug("Can't get the XHCI register base address\n"); return -ENXIO; } depth = 0; node = fdtdec_next_compatible_subnode(blob, dev->of_offset, COMPAT_SAMSUNG_EXYNOS_USB_PHY, &depth); if (node <= 0) { debug("XHCI: Can't get device node for usb3-phy controller\n"); return -ENODEV; } /* * Get the base address for usbphy from the device node */ plat->phy_base = fdtdec_get_addr(blob, node, "reg"); if (plat->phy_base == FDT_ADDR_T_NONE) { debug("Can't get the usbphy register address\n"); return -ENXIO; } /* Vbus gpio */ gpio_request_by_name(dev, "samsung,vbus-gpio", 0, &plat->vbus_gpio, GPIOD_IS_OUT); return 0; } static void exynos5_setup_usb_phy(struct exynos_usb_phy *usb) { u32 hsic_ctrl; clrbits_le32(&usb->usbphyctrl0, HOST_CTRL0_FSEL_MASK | HOST_CTRL0_COMMONON_N | /* HOST Phy setting */ HOST_CTRL0_PHYSWRST | HOST_CTRL0_PHYSWRSTALL | HOST_CTRL0_SIDDQ | HOST_CTRL0_FORCESUSPEND | HOST_CTRL0_FORCESLEEP); setbits_le32(&usb->usbphyctrl0, /* Setting up the ref freq */ (CLK_24MHZ << 16) | /* HOST Phy setting */ HOST_CTRL0_LINKSWRST | HOST_CTRL0_UTMISWRST); udelay(10); clrbits_le32(&usb->usbphyctrl0, HOST_CTRL0_LINKSWRST | HOST_CTRL0_UTMISWRST); /* HSIC Phy Setting */ hsic_ctrl = (HSIC_CTRL_FORCESUSPEND | HSIC_CTRL_FORCESLEEP | HSIC_CTRL_SIDDQ); clrbits_le32(&usb->hsicphyctrl1, hsic_ctrl); clrbits_le32(&usb->hsicphyctrl2, hsic_ctrl); hsic_ctrl = (((HSIC_CTRL_REFCLKDIV_12 & HSIC_CTRL_REFCLKDIV_MASK) << HSIC_CTRL_REFCLKDIV_SHIFT) | ((HSIC_CTRL_REFCLKSEL & HSIC_CTRL_REFCLKSEL_MASK) << HSIC_CTRL_REFCLKSEL_SHIFT) | HSIC_CTRL_UTMISWRST); setbits_le32(&usb->hsicphyctrl1, hsic_ctrl); setbits_le32(&usb->hsicphyctrl2, hsic_ctrl); udelay(10); clrbits_le32(&usb->hsicphyctrl1, HSIC_CTRL_PHYSWRST | HSIC_CTRL_UTMISWRST); clrbits_le32(&usb->hsicphyctrl2, HSIC_CTRL_PHYSWRST | HSIC_CTRL_UTMISWRST); udelay(20); /* EHCI Ctrl setting */ setbits_le32(&usb->ehcictrl, EHCICTRL_ENAINCRXALIGN | EHCICTRL_ENAINCR4 | EHCICTRL_ENAINCR8 | EHCICTRL_ENAINCR16); } static void exynos4412_setup_usb_phy(struct exynos4412_usb_phy *usb) { writel(CLK_24MHZ, &usb->usbphyclk); clrbits_le32(&usb->usbphyctrl, (PHYPWR_NORMAL_MASK_HSIC0 | PHYPWR_NORMAL_MASK_HSIC1 | PHYPWR_NORMAL_MASK_PHY1 | PHYPWR_NORMAL_MASK_PHY0)); setbits_le32(&usb->usbphyrstcon, (RSTCON_HOSTPHY_SWRST | RSTCON_SWRST)); udelay(10); clrbits_le32(&usb->usbphyrstcon, (RSTCON_HOSTPHY_SWRST | RSTCON_SWRST)); } static void setup_usb_phy(struct exynos_usb_phy *usb) { set_usbhost_mode(USB20_PHY_CFG_HOST_LINK_EN); set_usbhost_phy_ctrl(POWER_USB_HOST_PHY_CTRL_EN); if (cpu_is_exynos5()) exynos5_setup_usb_phy(usb); else if (cpu_is_exynos4()) if (proid_is_exynos4412()) exynos4412_setup_usb_phy((struct exynos4412_usb_phy *) usb); } static void exynos5_reset_usb_phy(struct exynos_usb_phy *usb) { u32 hsic_ctrl; /* HOST_PHY reset */ setbits_le32(&usb->usbphyctrl0, HOST_CTRL0_PHYSWRST | HOST_CTRL0_PHYSWRSTALL | HOST_CTRL0_SIDDQ | HOST_CTRL0_FORCESUSPEND | HOST_CTRL0_FORCESLEEP); /* HSIC Phy reset */ hsic_ctrl = (HSIC_CTRL_FORCESUSPEND | HSIC_CTRL_FORCESLEEP | HSIC_CTRL_SIDDQ | HSIC_CTRL_PHYSWRST); setbits_le32(&usb->hsicphyctrl1, hsic_ctrl); setbits_le32(&usb->hsicphyctrl2, hsic_ctrl); } static void exynos4412_reset_usb_phy(struct exynos4412_usb_phy *usb) { setbits_le32(&usb->usbphyctrl, (PHYPWR_NORMAL_MASK_HSIC0 | PHYPWR_NORMAL_MASK_HSIC1 | PHYPWR_NORMAL_MASK_PHY1 | PHYPWR_NORMAL_MASK_PHY0)); } /* Reset the EHCI host controller. */ static void reset_usb_phy(struct exynos_usb_phy *usb) { if (cpu_is_exynos5()) exynos5_reset_usb_phy(usb); else if (cpu_is_exynos4()) if (proid_is_exynos4412()) exynos4412_reset_usb_phy((struct exynos4412_usb_phy *) usb); set_usbhost_phy_ctrl(POWER_USB_HOST_PHY_CTRL_DISABLE); } static int ehci_usb_probe(struct udevice *dev) { struct exynos_ehci_platdata *plat = dev_get_platdata(dev); struct exynos_ehci *ctx = dev_get_priv(dev); struct ehci_hcor *hcor; ctx->hcd = (struct ehci_hccr *)plat->hcd_base; ctx->usb = (struct exynos_usb_phy *)plat->phy_base; /* setup the Vbus gpio here */ if (dm_gpio_is_valid(&plat->vbus_gpio)) dm_gpio_set_value(&plat->vbus_gpio, 1); setup_usb_phy(ctx->usb); hcor = (struct ehci_hcor *)((uint32_t)ctx->hcd + HC_LENGTH(ehci_readl(&ctx->hcd->cr_capbase))); return ehci_register(dev, ctx->hcd, hcor, NULL, 0, USB_INIT_HOST); } static int ehci_usb_remove(struct udevice *dev) { struct exynos_ehci *ctx = dev_get_priv(dev); int ret; ret = ehci_deregister(dev); if (ret) return ret; reset_usb_phy(ctx->usb); return 0; } static const struct udevice_id ehci_usb_ids[] = { { .compatible = "samsung,exynos-ehci" }, { } }; U_BOOT_DRIVER(usb_ehci) = { .name = "ehci_exynos", .id = UCLASS_USB, .of_match = ehci_usb_ids, .ofdata_to_platdata = ehci_usb_ofdata_to_platdata, .probe = ehci_usb_probe, .remove = ehci_usb_remove, .ops = &ehci_usb_ops, .priv_auto_alloc_size = sizeof(struct exynos_ehci), .platdata_auto_alloc_size = sizeof(struct exynos_ehci_platdata), .flags = DM_FLAG_ALLOC_PRIV_DMA, };