From: Patrice Chotard patrice.chotard@st.com
Add support for on-chip DWC3 controller available on STMicrolectronics STiH407 family SoCs. On B2260 board, the type AB USB connector is managed by a DWC3 IP. As USB3 signals are not wired, only USB2 is supported.
Signed-off-by: Patrice Chotard patrice.chotard@st.com --- drivers/usb/host/Kconfig | 8 +++ drivers/usb/host/Makefile | 1 + drivers/usb/host/xhci-sti.c | 156 ++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 165 insertions(+) create mode 100644 drivers/usb/host/xhci-sti.c
diff --git a/drivers/usb/host/Kconfig b/drivers/usb/host/Kconfig index 33ded5d..58b64df 100644 --- a/drivers/usb/host/Kconfig +++ b/drivers/usb/host/Kconfig @@ -37,6 +37,14 @@ config USB_XHCI_ROCKCHIP help Enables support for the on-chip xHCI controller on Rockchip SoCs.
+config USB_XHCI_STI + bool "Support for STMicroelectronics STiH407 family on-chip xHCI USB controller" + depends on ARCH_STI + default y + help + Enables support for the on-chip xHCI controller on STMicroelectronics + STiH407 family SoCs. + config USB_XHCI_ZYNQMP bool "Support for Xilinx ZynqMP on-chip xHCI USB controller" depends on ARCH_ZYNQMP diff --git a/drivers/usb/host/Makefile b/drivers/usb/host/Makefile index b78e632..40ff830 100644 --- a/drivers/usb/host/Makefile +++ b/drivers/usb/host/Makefile @@ -66,6 +66,7 @@ obj-$(CONFIG_USB_XHCI_FSL) += xhci-fsl.o obj-$(CONFIG_USB_XHCI_MVEBU) += xhci-mvebu.o obj-$(CONFIG_USB_XHCI_OMAP) += xhci-omap.o obj-$(CONFIG_USB_XHCI_PCI) += xhci-pci.o +obj-$(CONFIG_USB_XHCI_STI) += xhci-sti.o
# designware obj-$(CONFIG_USB_DWC2) += dwc2.o diff --git a/drivers/usb/host/xhci-sti.c b/drivers/usb/host/xhci-sti.c new file mode 100644 index 0000000..00f17ce --- /dev/null +++ b/drivers/usb/host/xhci-sti.c @@ -0,0 +1,156 @@ +/* + * Copyright (c) 2017 + * Patrice Chotard patrice.chotard@st.com + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include <common.h> +#include <asm/io.h> +#include <dm.h> +#include <errno.h> +#include <fdtdec.h> +#include <libfdt.h> +#include <reset-uclass.h> +#include <usb.h> + +#include <linux/usb/dwc3.h> + +#include "xhci.h" + +DECLARE_GLOBAL_DATA_PTR; + +struct sti_xhci_platdata { + struct reset_ctl powerdown_ctl; + struct reset_ctl softreset_ctl; + phys_addr_t dwc3_regs; +}; + +struct sti_xhci_priv { + struct xhci_ctrl ctrl; +}; + + +static int sti_xhci_ofdata_to_platdata(struct udevice *dev) +{ + struct sti_xhci_platdata *plat = dev_get_platdata(dev); + struct udevice *dev_phy; + int ret; + int phy_node; + int dwc3_node; + u32 reg[2]; + + /* get powerdown reset */ + ret = reset_get_by_name(dev, "powerdown", &plat->powerdown_ctl); + if (ret) { + error("can't get powerdown reset for %s (%d)", dev->name, ret); + return ret; + } + + /* get softreset reset */ + ret = reset_get_by_name(dev, "softreset", &plat->softreset_ctl); + if (ret) { + error("can't get soft reset for %s (%d)", dev->name, ret); + return ret; + } + + /* deassert both powerdown and softreset */ + ret = reset_deassert(&plat->powerdown_ctl); + if (ret < 0) { + error("DWC3 powerdown reset deassert failed: %d", ret); + return ret; + } + + ret = reset_deassert(&plat->softreset_ctl); + if (ret < 0) { + error("DWC3 soft reset deassert failed: %d", ret); + return ret; + } + + /* check if dwc3 subnode is present */ + dwc3_node = fdt_first_subnode(gd->fdt_blob, dev_of_offset(dev)); + if (dwc3_node <= 0) { + error("Can't find subnode for st_dwc3 glue driver\n"); + return -ENODEV; + } + + if (fdt_node_check_compatible(gd->fdt_blob, dwc3_node, + "snps,dwc3") != 0) { + error("Can't find dwv3 subnode for st_dwc3 glue driver\n"); + return -ENODEV; + } + + /* + * now parse the dwc3 node + * first get the phy node: only usb2-phy, no need to get usb3-phy as + * usb3 is not wired + */ + phy_node = fdtdec_lookup_phandle(gd->fdt_blob, dwc3_node, "phys"); + if (phy_node <= 0) { + error("Can't find usb phy device\n"); + return -ENODEV; + } + + /* get the dwc3 register space base address */ + if (fdtdec_get_int_array(gd->fdt_blob, dwc3_node, "reg", reg, + ARRAY_SIZE(reg))) { + debug("dwc3 node has bad/missing 'reg' property\n"); + return -FDT_ERR_NOTFOUND; + } + plat->dwc3_regs = reg[0]; + + /* probe associated phy */ + return uclass_get_device_by_of_offset(UCLASS_MISC, phy_node, &dev_phy); +}; + +static int sti_xhci_core_init(struct dwc3 *dwc3_reg) +{ + int ret; + + ret = dwc3_core_init(dwc3_reg); + if (ret) { + debug("failed to initialize core\n"); + return ret; + } + + /* We are hard-coding DWC3 core to Host Mode */ + dwc3_set_mode(dwc3_reg, DWC3_GCTL_PRTCAP_HOST); + + return 0; +} + +static int sti_dwc3_probe(struct udevice *dev) +{ + struct sti_xhci_platdata *plat = dev_get_platdata(dev); + struct xhci_hcor *hcor; + struct xhci_hccr *hccr; + struct dwc3 *dwc3_reg; + + hccr = (struct xhci_hccr *)plat->dwc3_regs; + hcor = (struct xhci_hcor *)((phys_addr_t)hccr + + HC_LENGTH(xhci_readl(&(hccr)->cr_capbase))); + + dwc3_reg = (struct dwc3 *)((char *)(hccr) + DWC3_REG_OFFSET); + + sti_xhci_core_init(dwc3_reg); + + return xhci_register(dev, hccr, hcor); +} + +static const struct udevice_id sti_dwc3_ids[] = { + { .compatible = "st,stih407-dwc3" }, + { } +}; + +U_BOOT_DRIVER(xhci_sti) = { + .name = "xhci_sti", + .id = UCLASS_USB, + .of_match = sti_dwc3_ids, + .ofdata_to_platdata = sti_xhci_ofdata_to_platdata, + .probe = sti_dwc3_probe, + .remove = xhci_deregister, + .ops = &xhci_usb_ops, + .priv_auto_alloc_size = sizeof(struct sti_xhci_priv), + .platdata_auto_alloc_size = sizeof(struct sti_xhci_platdata), + .flags = DM_FLAG_ALLOC_PRIV_DMA, +};