// SPDX-License-Identifier: GPL-2.0+ /* * Qualcomm EHCI driver * * (C) Copyright 2015 Mateusz Kulikowski * * Based on Linux driver */ #include #include #include #include #include #include #include #include #include #include #include #include #include "ehci.h" struct msm_ehci_priv { struct ehci_ctrl ctrl; /* Needed by EHCI */ struct usb_ehci *ehci; /* Start of IP core*/ struct ulpi_viewport ulpi_vp; /* ULPI Viewport */ struct phy phy; }; static int msm_init_after_reset(struct ehci_ctrl *dev) { struct msm_ehci_priv *p = container_of(dev, struct msm_ehci_priv, ctrl); struct usb_ehci *ehci = p->ehci; generic_phy_reset(&p->phy); /* set mode to host controller */ writel(CM_HOST, &ehci->usbmode); return 0; } static const struct ehci_ops msm_ehci_ops = { .init_after_reset = msm_init_after_reset }; static int ehci_usb_probe(struct udevice *dev) { struct msm_ehci_priv *p = dev_get_priv(dev); struct usb_ehci *ehci = p->ehci; struct ehci_hccr *hccr; struct ehci_hcor *hcor; int ret; hccr = (struct ehci_hccr *)((phys_addr_t)&ehci->caplength); hcor = (struct ehci_hcor *)((phys_addr_t)hccr + HC_LENGTH(ehci_readl(&(hccr)->cr_capbase))); ret = ehci_setup_phy(dev, &p->phy, 0); if (ret) return ret; ret = board_usb_init(0, USB_INIT_HOST); if (ret < 0) return ret; return ehci_register(dev, hccr, hcor, &msm_ehci_ops, 0, USB_INIT_HOST); } static int ehci_usb_remove(struct udevice *dev) { struct msm_ehci_priv *p = dev_get_priv(dev); struct usb_ehci *ehci = p->ehci; int ret; ret = ehci_deregister(dev); if (ret) return ret; /* Stop controller. */ clrbits_le32(&ehci->usbcmd, CMD_RUN); ret = ehci_shutdown_phy(dev, &p->phy); if (ret) return ret; ret = board_usb_init(0, USB_INIT_DEVICE); /* Board specific hook */ if (ret < 0) return ret; /* Reset controller */ setbits_le32(&ehci->usbcmd, CMD_RESET); /* Wait for reset */ if (wait_for_bit_le32(&ehci->usbcmd, CMD_RESET, false, 30, false)) { printf("Stuck on USB reset.\n"); return -ETIMEDOUT; } return 0; } static int ehci_usb_ofdata_to_platdata(struct udevice *dev) { struct msm_ehci_priv *priv = dev_get_priv(dev); priv->ulpi_vp.port_num = 0; priv->ehci = (void *)devfdt_get_addr(dev); if (priv->ehci == (void *)FDT_ADDR_T_NONE) return -EINVAL; /* Warning: this will not work if viewport address is > 64 bit due to * ULPI design. */ priv->ulpi_vp.viewport_addr = (phys_addr_t)&priv->ehci->ulpi_viewpoint; return 0; } static const struct udevice_id ehci_usb_ids[] = { { .compatible = "qcom,ehci-host", }, { } }; U_BOOT_DRIVER(usb_ehci) = { .name = "ehci_msm", .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 msm_ehci_priv), .platdata_auto_alloc_size = sizeof(struct usb_platdata), .flags = DM_FLAG_ALLOC_PRIV_DMA, };