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u-boot/drivers/usb/dwc3/dwc3-generic.c
Angus Ainslie c08db05455 usb: dwc3: dwc3-generic: check the parent nodes 
The kernel devicetree has definitions for port and hub nodes as subnodes
to the USB devices. These subnodes don't contain all of the data required
to properly configure the dwc3. Check the parent nodes if the data is not
in the port/hub node.

Here's an example from the librem5 kernel dts file

&usb_dwc3_0 {
	#address-cells = <1>;
	#size-cells = <0>;
	dr_mode = "otg";
	snps,dis_u3_susphy_quirk;
	status = "okay";

	port@0 {
		reg = <0>;

		typec_hs: endpoint {
			remote-endpoint = <&usb_con_hs>;
		};
	};

	port@1 {
		reg = <1>;

		typec_ss: endpoint {
			remote-endpoint = <&usb_con_ss>;
		};
	};
};

&usb_dwc3_1 {
	dr_mode = "host";
	status = "okay";
	#address-cells = <1>;
	#size-cells = <0>;

	/* Microchip USB2642 */
	hub@1 {
		compatible = "usb424,2640";
		reg = <1>;
		#address-cells = <1>;
		#size-cells = <0>;

		mass-storage@1 {
			compatible = "usb424,4041";
			reg = <1>;
		};
	};
};

Signed-off-by: Angus Ainslie <angus@akkea.ca>
2022-02-16 16:52:56 +01:00

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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);
if (!strncmp(dev->name, "port", 4) || !strncmp(dev->name, "hub", 3)) {
/* This is a leaf so check the parent */
plat->base = dev_read_addr(dev->parent);
} else {
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) {
/* might be a leaf so check the parent for mode */
node = dev_ofnode(dev->parent);
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;
enum usb_dr_mode dr_mode;
dr_mode = usb_get_dr_mode(dev_ofnode(parent));
ofnode_for_each_subnode(node, dev_ofnode(parent)) {
const char *name = ofnode_get_name(node);
struct udevice *dev;
const char *driver = NULL;
debug("%s: subnode name: %s\n", __func__, name);
/* if the parent node doesn't have a mode check the leaf */
if (!dr_mode)
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 = "fsl,imx8mq-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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