mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-05 19:10:13 +00:00
6a6468f479
When the device tree indicates support for role switching through the "usb-role-switch" property, take the "role-switch-default-mode" property into account when deciding which role to put the controller into. This makes USB devices work on Apple M1 systems where the device tree may include a "dr_mode" property that is set to "otg", but where we need to put the controller into "host" mode to see devices connected to the type-C ports. Signed-off-by: Mark Kettenis <kettenis@openbsd.org>
256 lines
5.8 KiB
C
256 lines
5.8 KiB
C
// SPDX-License-Identifier: GPL-2.0+
|
|
/*
|
|
* Copyright 2015 Freescale Semiconductor, Inc.
|
|
*
|
|
* DWC3 controller driver
|
|
*
|
|
* Author: Ramneek Mehresh<ramneek.mehresh@freescale.com>
|
|
*/
|
|
|
|
#include <clk.h>
|
|
#include <common.h>
|
|
#include <dm.h>
|
|
#include <generic-phy.h>
|
|
#include <log.h>
|
|
#include <reset.h>
|
|
#include <usb.h>
|
|
#include <dwc3-uboot.h>
|
|
#include <linux/delay.h>
|
|
|
|
#include <usb/xhci.h>
|
|
#include <asm/io.h>
|
|
#include <linux/usb/dwc3.h>
|
|
#include <linux/usb/otg.h>
|
|
|
|
struct xhci_dwc3_plat {
|
|
struct clk_bulk clks;
|
|
struct phy_bulk phys;
|
|
struct reset_ctl_bulk resets;
|
|
};
|
|
|
|
void dwc3_set_mode(struct dwc3 *dwc3_reg, u32 mode)
|
|
{
|
|
clrsetbits_le32(&dwc3_reg->g_ctl,
|
|
DWC3_GCTL_PRTCAPDIR(DWC3_GCTL_PRTCAP_OTG),
|
|
DWC3_GCTL_PRTCAPDIR(mode));
|
|
}
|
|
|
|
static void dwc3_phy_reset(struct dwc3 *dwc3_reg)
|
|
{
|
|
/* Assert USB3 PHY reset */
|
|
setbits_le32(&dwc3_reg->g_usb3pipectl[0], DWC3_GUSB3PIPECTL_PHYSOFTRST);
|
|
|
|
/* Assert USB2 PHY reset */
|
|
setbits_le32(&dwc3_reg->g_usb2phycfg, DWC3_GUSB2PHYCFG_PHYSOFTRST);
|
|
|
|
mdelay(100);
|
|
|
|
/* Clear USB3 PHY reset */
|
|
clrbits_le32(&dwc3_reg->g_usb3pipectl[0], DWC3_GUSB3PIPECTL_PHYSOFTRST);
|
|
|
|
/* Clear USB2 PHY reset */
|
|
clrbits_le32(&dwc3_reg->g_usb2phycfg, DWC3_GUSB2PHYCFG_PHYSOFTRST);
|
|
}
|
|
|
|
void dwc3_core_soft_reset(struct dwc3 *dwc3_reg)
|
|
{
|
|
/* Before Resetting PHY, put Core in Reset */
|
|
setbits_le32(&dwc3_reg->g_ctl, DWC3_GCTL_CORESOFTRESET);
|
|
|
|
/* reset USB3 phy - if required */
|
|
dwc3_phy_reset(dwc3_reg);
|
|
|
|
mdelay(100);
|
|
|
|
/* After PHYs are stable we can take Core out of reset state */
|
|
clrbits_le32(&dwc3_reg->g_ctl, DWC3_GCTL_CORESOFTRESET);
|
|
}
|
|
|
|
int dwc3_core_init(struct dwc3 *dwc3_reg)
|
|
{
|
|
u32 reg;
|
|
u32 revision;
|
|
unsigned int dwc3_hwparams1;
|
|
|
|
revision = readl(&dwc3_reg->g_snpsid);
|
|
/* This should read as U3 followed by revision number */
|
|
if ((revision & DWC3_GSNPSID_MASK) != 0x55330000 &&
|
|
(revision & DWC3_GSNPSID_MASK) != 0x33310000) {
|
|
puts("this is not a DesignWare USB3 DRD Core\n");
|
|
return -1;
|
|
}
|
|
|
|
dwc3_core_soft_reset(dwc3_reg);
|
|
|
|
dwc3_hwparams1 = readl(&dwc3_reg->g_hwparams1);
|
|
|
|
reg = readl(&dwc3_reg->g_ctl);
|
|
reg &= ~DWC3_GCTL_SCALEDOWN_MASK;
|
|
reg &= ~DWC3_GCTL_DISSCRAMBLE;
|
|
switch (DWC3_GHWPARAMS1_EN_PWROPT(dwc3_hwparams1)) {
|
|
case DWC3_GHWPARAMS1_EN_PWROPT_CLK:
|
|
reg &= ~DWC3_GCTL_DSBLCLKGTNG;
|
|
break;
|
|
default:
|
|
debug("No power optimization available\n");
|
|
}
|
|
|
|
/*
|
|
* WORKAROUND: DWC3 revisions <1.90a have a bug
|
|
* where the device can fail to connect at SuperSpeed
|
|
* and falls back to high-speed mode which causes
|
|
* the device to enter a Connect/Disconnect loop
|
|
*/
|
|
if ((revision & DWC3_REVISION_MASK) < 0x190a)
|
|
reg |= DWC3_GCTL_U2RSTECN;
|
|
|
|
writel(reg, &dwc3_reg->g_ctl);
|
|
|
|
return 0;
|
|
}
|
|
|
|
void dwc3_set_fladj(struct dwc3 *dwc3_reg, u32 val)
|
|
{
|
|
setbits_le32(&dwc3_reg->g_fladj, GFLADJ_30MHZ_REG_SEL |
|
|
GFLADJ_30MHZ(val));
|
|
}
|
|
|
|
#if CONFIG_IS_ENABLED(DM_USB)
|
|
static int xhci_dwc3_reset_init(struct udevice *dev,
|
|
struct xhci_dwc3_plat *plat)
|
|
{
|
|
int ret;
|
|
|
|
ret = reset_get_bulk(dev, &plat->resets);
|
|
if (ret == -ENOTSUPP || ret == -ENOENT)
|
|
return 0;
|
|
else if (ret)
|
|
return ret;
|
|
|
|
ret = reset_deassert_bulk(&plat->resets);
|
|
if (ret) {
|
|
reset_release_bulk(&plat->resets);
|
|
return ret;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int xhci_dwc3_clk_init(struct udevice *dev,
|
|
struct xhci_dwc3_plat *plat)
|
|
{
|
|
int ret;
|
|
|
|
ret = clk_get_bulk(dev, &plat->clks);
|
|
if (ret == -ENOSYS || ret == -ENOENT)
|
|
return 0;
|
|
if (ret)
|
|
return ret;
|
|
|
|
ret = clk_enable_bulk(&plat->clks);
|
|
if (ret) {
|
|
clk_release_bulk(&plat->clks);
|
|
return ret;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int xhci_dwc3_probe(struct udevice *dev)
|
|
{
|
|
struct xhci_hcor *hcor;
|
|
struct xhci_hccr *hccr;
|
|
struct dwc3 *dwc3_reg;
|
|
enum usb_dr_mode dr_mode;
|
|
struct xhci_dwc3_plat *plat = dev_get_plat(dev);
|
|
const char *phy;
|
|
u32 reg;
|
|
int ret;
|
|
|
|
ret = xhci_dwc3_reset_init(dev, plat);
|
|
if (ret)
|
|
return ret;
|
|
|
|
ret = xhci_dwc3_clk_init(dev, plat);
|
|
if (ret)
|
|
return ret;
|
|
|
|
hccr = (struct xhci_hccr *)((uintptr_t)dev_remap_addr(dev));
|
|
hcor = (struct xhci_hcor *)((uintptr_t)hccr +
|
|
HC_LENGTH(xhci_readl(&(hccr)->cr_capbase)));
|
|
|
|
ret = dwc3_setup_phy(dev, &plat->phys);
|
|
if (ret && (ret != -ENOTSUPP))
|
|
return ret;
|
|
|
|
dwc3_reg = (struct dwc3 *)((char *)(hccr) + DWC3_REG_OFFSET);
|
|
|
|
dwc3_core_init(dwc3_reg);
|
|
|
|
/* Set dwc3 usb2 phy config */
|
|
reg = readl(&dwc3_reg->g_usb2phycfg[0]);
|
|
|
|
phy = dev_read_string(dev, "phy_type");
|
|
if (phy && strcmp(phy, "utmi_wide") == 0) {
|
|
reg |= DWC3_GUSB2PHYCFG_PHYIF;
|
|
reg &= ~DWC3_GUSB2PHYCFG_USBTRDTIM_MASK;
|
|
reg |= DWC3_GUSB2PHYCFG_USBTRDTIM_16BIT;
|
|
}
|
|
|
|
if (dev_read_bool(dev, "snps,dis_enblslpm-quirk"))
|
|
reg &= ~DWC3_GUSB2PHYCFG_ENBLSLPM;
|
|
|
|
if (dev_read_bool(dev, "snps,dis-u2-freeclk-exists-quirk"))
|
|
reg &= ~DWC3_GUSB2PHYCFG_U2_FREECLK_EXISTS;
|
|
|
|
if (dev_read_bool(dev, "snps,dis_u2_susphy_quirk"))
|
|
reg &= ~DWC3_GUSB2PHYCFG_SUSPHY;
|
|
|
|
writel(reg, &dwc3_reg->g_usb2phycfg[0]);
|
|
|
|
dr_mode = usb_get_dr_mode(dev_ofnode(dev));
|
|
if (dr_mode == USB_DR_MODE_OTG &&
|
|
dev_read_bool(dev, "usb-role-switch")) {
|
|
dr_mode = usb_get_role_switch_default_mode(dev_ofnode(dev));
|
|
if (dr_mode == USB_DR_MODE_UNKNOWN)
|
|
dr_mode = USB_DR_MODE_OTG;
|
|
}
|
|
if (dr_mode == USB_DR_MODE_UNKNOWN)
|
|
/* by default set dual role mode to HOST */
|
|
dr_mode = USB_DR_MODE_HOST;
|
|
|
|
dwc3_set_mode(dwc3_reg, dr_mode);
|
|
|
|
return xhci_register(dev, hccr, hcor);
|
|
}
|
|
|
|
static int xhci_dwc3_remove(struct udevice *dev)
|
|
{
|
|
struct xhci_dwc3_plat *plat = dev_get_plat(dev);
|
|
|
|
dwc3_shutdown_phy(dev, &plat->phys);
|
|
|
|
clk_release_bulk(&plat->clks);
|
|
|
|
reset_release_bulk(&plat->resets);
|
|
|
|
return xhci_deregister(dev);
|
|
}
|
|
|
|
static const struct udevice_id xhci_dwc3_ids[] = {
|
|
{ .compatible = "snps,dwc3" },
|
|
{ }
|
|
};
|
|
|
|
U_BOOT_DRIVER(xhci_dwc3) = {
|
|
.name = "xhci-dwc3",
|
|
.id = UCLASS_USB,
|
|
.of_match = xhci_dwc3_ids,
|
|
.probe = xhci_dwc3_probe,
|
|
.remove = xhci_dwc3_remove,
|
|
.ops = &xhci_usb_ops,
|
|
.priv_auto = sizeof(struct xhci_ctrl),
|
|
.plat_auto = sizeof(struct xhci_dwc3_plat),
|
|
.flags = DM_FLAG_ALLOC_PRIV_DMA,
|
|
};
|
|
#endif
|