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- // SPDX-License-Identifier: GPL-2.0
- /*
- * Generic DWC3 Glue layer
- *
- * Copyright (C) 2016 - 2018 Xilinx, Inc.
- *
- * Based on dwc3-omap.c.
- */
- #include <common.h>
- #include <cpu_func.h>
- #include <log.h>
- #include <dm.h>
- #include <dm/device-internal.h>
- #include <dm/lists.h>
- #include <dwc3-uboot.h>
- #include <linux/bitops.h>
- #include <linux/delay.h>
- #include <linux/usb/ch9.h>
- #include <linux/usb/gadget.h>
- #include <malloc.h>
- #include <usb.h>
- #include "core.h"
- #include "gadget.h"
- #include <reset.h>
- #include <clk.h>
- #include <usb/xhci.h>
- struct dwc3_glue_data {
- struct clk_bulk clks;
- struct reset_ctl_bulk resets;
- fdt_addr_t regs;
- };
- struct dwc3_generic_plat {
- fdt_addr_t base;
- u32 maximum_speed;
- enum usb_dr_mode dr_mode;
- };
- struct dwc3_generic_priv {
- void *base;
- struct dwc3 dwc3;
- struct phy_bulk phys;
- };
- struct dwc3_generic_host_priv {
- struct xhci_ctrl xhci_ctrl;
- struct dwc3_generic_priv gen_priv;
- };
- static int dwc3_generic_probe(struct udevice *dev,
- struct dwc3_generic_priv *priv)
- {
- int rc;
- struct dwc3_generic_plat *plat = dev_get_plat(dev);
- struct dwc3 *dwc3 = &priv->dwc3;
- struct dwc3_glue_data *glue = dev_get_plat(dev->parent);
- dwc3->dev = dev;
- dwc3->maximum_speed = plat->maximum_speed;
- dwc3->dr_mode = plat->dr_mode;
- #if CONFIG_IS_ENABLED(OF_CONTROL)
- dwc3_of_parse(dwc3);
- #endif
- /*
- * It must hold whole USB3.0 OTG controller in resetting to hold pipe
- * power state in P2 before initializing TypeC PHY on RK3399 platform.
- */
- if (device_is_compatible(dev->parent, "rockchip,rk3399-dwc3")) {
- reset_assert_bulk(&glue->resets);
- udelay(1);
- }
- rc = dwc3_setup_phy(dev, &priv->phys);
- if (rc && rc != -ENOTSUPP)
- return rc;
- if (device_is_compatible(dev->parent, "rockchip,rk3399-dwc3"))
- reset_deassert_bulk(&glue->resets);
- priv->base = map_physmem(plat->base, DWC3_OTG_REGS_END, MAP_NOCACHE);
- dwc3->regs = priv->base + DWC3_GLOBALS_REGS_START;
- rc = dwc3_init(dwc3);
- if (rc) {
- unmap_physmem(priv->base, MAP_NOCACHE);
- return rc;
- }
- return 0;
- }
- static int dwc3_generic_remove(struct udevice *dev,
- struct dwc3_generic_priv *priv)
- {
- struct dwc3 *dwc3 = &priv->dwc3;
- dwc3_remove(dwc3);
- dwc3_shutdown_phy(dev, &priv->phys);
- unmap_physmem(dwc3->regs, MAP_NOCACHE);
- return 0;
- }
- static int dwc3_generic_of_to_plat(struct udevice *dev)
- {
- struct dwc3_generic_plat *plat = dev_get_plat(dev);
- ofnode node = dev_ofnode(dev);
- plat->base = dev_read_addr(dev);
- plat->maximum_speed = usb_get_maximum_speed(node);
- if (plat->maximum_speed == USB_SPEED_UNKNOWN) {
- pr_info("No USB maximum speed specified. Using super speed\n");
- plat->maximum_speed = USB_SPEED_SUPER;
- }
- plat->dr_mode = usb_get_dr_mode(node);
- if (plat->dr_mode == USB_DR_MODE_UNKNOWN) {
- pr_err("Invalid usb mode setup\n");
- return -ENODEV;
- }
- return 0;
- }
- #if CONFIG_IS_ENABLED(DM_USB_GADGET)
- int dm_usb_gadget_handle_interrupts(struct udevice *dev)
- {
- struct dwc3_generic_priv *priv = dev_get_priv(dev);
- struct dwc3 *dwc3 = &priv->dwc3;
- dwc3_gadget_uboot_handle_interrupt(dwc3);
- return 0;
- }
- static int dwc3_generic_peripheral_probe(struct udevice *dev)
- {
- struct dwc3_generic_priv *priv = dev_get_priv(dev);
- return dwc3_generic_probe(dev, priv);
- }
- static int dwc3_generic_peripheral_remove(struct udevice *dev)
- {
- struct dwc3_generic_priv *priv = dev_get_priv(dev);
- return dwc3_generic_remove(dev, priv);
- }
- U_BOOT_DRIVER(dwc3_generic_peripheral) = {
- .name = "dwc3-generic-peripheral",
- .id = UCLASS_USB_GADGET_GENERIC,
- .of_to_plat = dwc3_generic_of_to_plat,
- .probe = dwc3_generic_peripheral_probe,
- .remove = dwc3_generic_peripheral_remove,
- .priv_auto = sizeof(struct dwc3_generic_priv),
- .plat_auto = sizeof(struct dwc3_generic_plat),
- };
- #endif
- #if defined(CONFIG_SPL_USB_HOST) || \
- !defined(CONFIG_SPL_BUILD) && defined(CONFIG_USB_HOST)
- static int dwc3_generic_host_probe(struct udevice *dev)
- {
- struct xhci_hcor *hcor;
- struct xhci_hccr *hccr;
- struct dwc3_generic_host_priv *priv = dev_get_priv(dev);
- int rc;
- rc = dwc3_generic_probe(dev, &priv->gen_priv);
- if (rc)
- return rc;
- hccr = (struct xhci_hccr *)priv->gen_priv.base;
- hcor = (struct xhci_hcor *)(priv->gen_priv.base +
- HC_LENGTH(xhci_readl(&(hccr)->cr_capbase)));
- return xhci_register(dev, hccr, hcor);
- }
- static int dwc3_generic_host_remove(struct udevice *dev)
- {
- struct dwc3_generic_host_priv *priv = dev_get_priv(dev);
- int rc;
- rc = xhci_deregister(dev);
- if (rc)
- return rc;
- return dwc3_generic_remove(dev, &priv->gen_priv);
- }
- U_BOOT_DRIVER(dwc3_generic_host) = {
- .name = "dwc3-generic-host",
- .id = UCLASS_USB,
- .of_to_plat = dwc3_generic_of_to_plat,
- .probe = dwc3_generic_host_probe,
- .remove = dwc3_generic_host_remove,
- .priv_auto = sizeof(struct dwc3_generic_host_priv),
- .plat_auto = sizeof(struct dwc3_generic_plat),
- .ops = &xhci_usb_ops,
- .flags = DM_FLAG_ALLOC_PRIV_DMA,
- };
- #endif
- struct dwc3_glue_ops {
- void (*select_dr_mode)(struct udevice *dev, int index,
- enum usb_dr_mode mode);
- };
- void dwc3_ti_select_dr_mode(struct udevice *dev, int index,
- enum usb_dr_mode mode)
- {
- #define USBOTGSS_UTMI_OTG_STATUS 0x0084
- #define USBOTGSS_UTMI_OTG_OFFSET 0x0480
- /* UTMI_OTG_STATUS REGISTER */
- #define USBOTGSS_UTMI_OTG_STATUS_SW_MODE BIT(31)
- #define USBOTGSS_UTMI_OTG_STATUS_POWERPRESENT BIT(9)
- #define USBOTGSS_UTMI_OTG_STATUS_TXBITSTUFFENABLE BIT(8)
- #define USBOTGSS_UTMI_OTG_STATUS_IDDIG BIT(4)
- #define USBOTGSS_UTMI_OTG_STATUS_SESSEND BIT(3)
- #define USBOTGSS_UTMI_OTG_STATUS_SESSVALID BIT(2)
- #define USBOTGSS_UTMI_OTG_STATUS_VBUSVALID BIT(1)
- enum dwc3_omap_utmi_mode {
- DWC3_OMAP_UTMI_MODE_UNKNOWN = 0,
- DWC3_OMAP_UTMI_MODE_HW,
- DWC3_OMAP_UTMI_MODE_SW,
- };
- u32 use_id_pin;
- u32 host_mode;
- u32 reg;
- u32 utmi_mode;
- u32 utmi_status_offset = USBOTGSS_UTMI_OTG_STATUS;
- struct dwc3_glue_data *glue = dev_get_plat(dev);
- void *base = map_physmem(glue->regs, 0x10000, MAP_NOCACHE);
- if (device_is_compatible(dev, "ti,am437x-dwc3"))
- utmi_status_offset += USBOTGSS_UTMI_OTG_OFFSET;
- utmi_mode = dev_read_u32_default(dev, "utmi-mode",
- DWC3_OMAP_UTMI_MODE_UNKNOWN);
- if (utmi_mode != DWC3_OMAP_UTMI_MODE_HW) {
- debug("%s: OTG is not supported. defaulting to PERIPHERAL\n",
- dev->name);
- mode = USB_DR_MODE_PERIPHERAL;
- }
- switch (mode) {
- case USB_DR_MODE_PERIPHERAL:
- use_id_pin = 0;
- host_mode = 0;
- break;
- case USB_DR_MODE_HOST:
- use_id_pin = 0;
- host_mode = 1;
- break;
- case USB_DR_MODE_OTG:
- default:
- use_id_pin = 1;
- host_mode = 0;
- break;
- }
- reg = readl(base + utmi_status_offset);
- reg &= ~(USBOTGSS_UTMI_OTG_STATUS_SW_MODE);
- if (!use_id_pin)
- reg |= USBOTGSS_UTMI_OTG_STATUS_SW_MODE;
- writel(reg, base + utmi_status_offset);
- reg &= ~(USBOTGSS_UTMI_OTG_STATUS_SESSEND |
- USBOTGSS_UTMI_OTG_STATUS_VBUSVALID |
- USBOTGSS_UTMI_OTG_STATUS_IDDIG);
- reg |= USBOTGSS_UTMI_OTG_STATUS_SESSVALID |
- USBOTGSS_UTMI_OTG_STATUS_POWERPRESENT;
- if (!host_mode)
- reg |= USBOTGSS_UTMI_OTG_STATUS_IDDIG |
- USBOTGSS_UTMI_OTG_STATUS_VBUSVALID;
- writel(reg, base + utmi_status_offset);
- unmap_physmem(base, MAP_NOCACHE);
- }
- struct dwc3_glue_ops ti_ops = {
- .select_dr_mode = dwc3_ti_select_dr_mode,
- };
- static int dwc3_glue_bind(struct udevice *parent)
- {
- ofnode node;
- int ret;
- ofnode_for_each_subnode(node, dev_ofnode(parent)) {
- const char *name = ofnode_get_name(node);
- enum usb_dr_mode dr_mode;
- struct udevice *dev;
- const char *driver = NULL;
- debug("%s: subnode name: %s\n", __func__, name);
- dr_mode = usb_get_dr_mode(node);
- switch (dr_mode) {
- case USB_DR_MODE_PERIPHERAL:
- case USB_DR_MODE_OTG:
- #if CONFIG_IS_ENABLED(DM_USB_GADGET)
- debug("%s: dr_mode: OTG or Peripheral\n", __func__);
- driver = "dwc3-generic-peripheral";
- #endif
- break;
- #if defined(CONFIG_SPL_USB_HOST) || !defined(CONFIG_SPL_BUILD)
- case USB_DR_MODE_HOST:
- debug("%s: dr_mode: HOST\n", __func__);
- driver = "dwc3-generic-host";
- break;
- #endif
- default:
- debug("%s: unsupported dr_mode\n", __func__);
- return -ENODEV;
- };
- if (!driver)
- continue;
- ret = device_bind_driver_to_node(parent, driver, name,
- node, &dev);
- if (ret) {
- debug("%s: not able to bind usb device mode\n",
- __func__);
- return ret;
- }
- }
- return 0;
- }
- static int dwc3_glue_reset_init(struct udevice *dev,
- struct dwc3_glue_data *glue)
- {
- int ret;
- ret = reset_get_bulk(dev, &glue->resets);
- if (ret == -ENOTSUPP || ret == -ENOENT)
- return 0;
- else if (ret)
- return ret;
- ret = reset_deassert_bulk(&glue->resets);
- if (ret) {
- reset_release_bulk(&glue->resets);
- return ret;
- }
- return 0;
- }
- static int dwc3_glue_clk_init(struct udevice *dev,
- struct dwc3_glue_data *glue)
- {
- int ret;
- ret = clk_get_bulk(dev, &glue->clks);
- if (ret == -ENOSYS || ret == -ENOENT)
- return 0;
- if (ret)
- return ret;
- #if CONFIG_IS_ENABLED(CLK)
- ret = clk_enable_bulk(&glue->clks);
- if (ret) {
- clk_release_bulk(&glue->clks);
- return ret;
- }
- #endif
- return 0;
- }
- static int dwc3_glue_probe(struct udevice *dev)
- {
- struct dwc3_glue_ops *ops = (struct dwc3_glue_ops *)dev_get_driver_data(dev);
- struct dwc3_glue_data *glue = dev_get_plat(dev);
- struct udevice *child = NULL;
- int index = 0;
- int ret;
- glue->regs = dev_read_addr(dev);
- ret = dwc3_glue_clk_init(dev, glue);
- if (ret)
- return ret;
- ret = dwc3_glue_reset_init(dev, glue);
- if (ret)
- return ret;
- ret = device_find_first_child(dev, &child);
- if (ret)
- return ret;
- if (glue->resets.count == 0) {
- ret = dwc3_glue_reset_init(child, glue);
- if (ret)
- return ret;
- }
- while (child) {
- enum usb_dr_mode dr_mode;
- dr_mode = usb_get_dr_mode(dev_ofnode(child));
- device_find_next_child(&child);
- if (ops && ops->select_dr_mode)
- ops->select_dr_mode(dev, index, dr_mode);
- index++;
- }
- return 0;
- }
- static int dwc3_glue_remove(struct udevice *dev)
- {
- struct dwc3_glue_data *glue = dev_get_plat(dev);
- reset_release_bulk(&glue->resets);
- clk_release_bulk(&glue->clks);
- return 0;
- }
- static const struct udevice_id dwc3_glue_ids[] = {
- { .compatible = "xlnx,zynqmp-dwc3" },
- { .compatible = "xlnx,versal-dwc3" },
- { .compatible = "ti,keystone-dwc3"},
- { .compatible = "ti,dwc3", .data = (ulong)&ti_ops },
- { .compatible = "ti,am437x-dwc3", .data = (ulong)&ti_ops },
- { .compatible = "ti,am654-dwc3" },
- { .compatible = "rockchip,rk3328-dwc3" },
- { .compatible = "rockchip,rk3399-dwc3" },
- { .compatible = "qcom,dwc3" },
- { .compatible = "intel,tangier-dwc3" },
- { }
- };
- U_BOOT_DRIVER(dwc3_generic_wrapper) = {
- .name = "dwc3-generic-wrapper",
- .id = UCLASS_NOP,
- .of_match = dwc3_glue_ids,
- .bind = dwc3_glue_bind,
- .probe = dwc3_glue_probe,
- .remove = dwc3_glue_remove,
- .plat_auto = sizeof(struct dwc3_glue_data),
- };
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