void dwc3_set_mode(struct dwc3 *dwc, u32 mode)
{
u32 reg;
reg = dwc3_readl(dwc->regs, DWC3_GCTL);
reg &= ~(DWC3_GCTL_PRTCAPDIR(DWC3_GCTL_PRTCAP_OTG));
reg |= DWC3_GCTL_PRTCAPDIR(mode);
reg |= DWC3_GCTL_U2RSTECN;
reg &= ~(DWC3_GCTL_SOFITPSYNC);
reg &= ~(DWC3_GCTL_PWRDNSCALEMASK);
reg |= DWC3_GCTL_PWRDNSCALE(2);
reg |= DWC3_GCTL_U2EXIT_LFPS;
dwc3_writel(dwc->regs, DWC3_GCTL, reg);
if (mode == DWC3_GCTL_PRTCAP_OTG || mode == DWC3_GCTL_PRTCAP_HOST) {
if (dwc->revision < DWC3_REVISION_250A) {
reg = dwc3_readl(dwc->regs, DWC3_GCTL);
reg |= DWC3_GCTL_SOFITPSYNC;
dwc3_writel(dwc->regs, DWC3_GCTL, reg);
} else {
reg = dwc3_readl(dwc->regs, DWC3_GFLADJ);
reg |= DWC3_GFLADJ_REFCLK_LPM_SEL;
dwc3_writel(dwc->regs, DWC3_GFLADJ, reg);
}
}
reg = dwc3_readl(dwc->regs, DWC3_GUSB3PIPECTL(0));
reg |= DWC3_GUSB3PIPECTL_SUSPHY;
dwc3_writel(dwc->regs, DWC3_GUSB3PIPECTL(0), reg);
reg = dwc3_readl(dwc->regs, DWC3_GUSB2PHYCFG(0));
reg |= DWC3_GUSB2PHYCFG_SUSPHY;
dwc3_writel(dwc->regs, DWC3_GUSB2PHYCFG(0), reg);
}
void dwc3_set_mode(struct dwc3 *dwc, u32 mode)
{
u32 reg;
reg = dwc3_readl(dwc->regs, DWC3_GCTL);
reg &= ~(DWC3_GCTL_PRTCAPDIR(DWC3_GCTL_PRTCAP_OTG));
reg |= DWC3_GCTL_PRTCAPDIR(mode);
/*
* Set this bit so that device attempts three more times at SS, even
* if it failed previously to operate in SS mode.
*/
reg |= DWC3_GCTL_U2RSTECN;
if (mode == DWC3_GCTL_PRTCAP_HOST) {
/*
* Allow ITP generated off of ref clk based counter instead
* of UTMI/ULPI clk based counter, when superspeed only is
* active so that UTMI/ULPI PHY can be suspened.
*/
reg |= DWC3_GCTL_SOFITPSYNC;
reg &= ~(DWC3_GCTL_PWRDNSCALEMASK);
reg |= DWC3_GCTL_PWRDNSCALE(2);
} else if (mode == DWC3_GCTL_PRTCAP_DEVICE) {
reg &= ~(DWC3_GCTL_PWRDNSCALEMASK);
reg |= DWC3_GCTL_PWRDNSCALE(2);
reg &= ~(DWC3_GCTL_SOFITPSYNC);
}
reg |= DWC3_GCTL_U2EXIT_LFPS;
dwc3_writel(dwc->regs, DWC3_GCTL, reg);
reg = dwc3_readl(dwc->regs, DWC3_GUSB3PIPECTL(0));
reg |= DWC3_GUSB3PIPECTL_SUSPHY;
dwc3_writel(dwc->regs, DWC3_GUSB3PIPECTL(0), reg);
reg = dwc3_readl(dwc->regs, DWC3_GUSB2PHYCFG(0));
reg |= DWC3_GUSB2PHYCFG_SUSPHY;
dwc3_writel(dwc->regs, DWC3_GUSB2PHYCFG(0), reg);
}
static int dwc3_ep0_set_config(struct dwc3 *dwc, struct usb_ctrlrequest *ctrl)
{
enum usb_device_state state = dwc->gadget.state;
u32 cfg;
int ret;
u32 reg;
dwc->start_config_issued = false;
cfg = le16_to_cpu(ctrl->wValue);
switch (state) {
case USB_STATE_DEFAULT:
return -EINVAL;
break;
case USB_STATE_ADDRESS:
ret = dwc3_ep0_delegate_req(dwc, ctrl);
/* if the cfg matches and the cfg is non zero */
if (cfg && (!ret || (ret == USB_GADGET_DELAYED_STATUS))) {
usb_gadget_set_state(&dwc->gadget,
USB_STATE_CONFIGURED);
if (dwc->ssphy_clear_auto_suspend_on_disconnect) {
reg = dwc3_readl(dwc->regs,
DWC3_GUSB3PIPECTL(0));
reg |= DWC3_GUSB3PIPECTL_SUSPHY;
dwc3_writel(dwc->regs, DWC3_GUSB3PIPECTL(0),
reg);
}
if (!dwc->usb3_u1u2_disable || enable_dwc3_u1u2) {
/*
* Enable transition to U1/U2 state when
* nothing is pending from application.
*/
reg = dwc3_readl(dwc->regs, DWC3_DCTL);
reg |= (DWC3_DCTL_ACCEPTU1ENA |
DWC3_DCTL_ACCEPTU2ENA);
dwc3_writel(dwc->regs, DWC3_DCTL, reg);
}
dwc->resize_fifos = true;
dev_dbg(dwc->dev, "resize fifos flag SET\n");
}
break;
case USB_STATE_CONFIGURED:
ret = dwc3_ep0_delegate_req(dwc, ctrl);
if (!cfg)
usb_gadget_set_state(&dwc->gadget,
USB_STATE_ADDRESS);
break;
default:
ret = -EINVAL;
}
return ret;
}
/**
* dwc3_core_soft_reset - Issues core soft reset and PHY reset
* @dwc: pointer to our context structure
*/
static int dwc3_core_soft_reset(struct dwc3 *dwc)
{
u32 reg;
int ret;
/* Before Resetting PHY, put Core in Reset */
reg = dwc3_readl(dwc->regs, DWC3_GCTL);
reg |= DWC3_GCTL_CORESOFTRESET;
dwc3_writel(dwc->regs, DWC3_GCTL, reg);
/* Assert USB3 PHY reset */
reg = dwc3_readl(dwc->regs, DWC3_GUSB3PIPECTL(0));
reg |= DWC3_GUSB3PIPECTL_PHYSOFTRST;
dwc3_writel(dwc->regs, DWC3_GUSB3PIPECTL(0), reg);
/* Assert USB2 PHY reset */
reg = dwc3_readl(dwc->regs, DWC3_GUSB2PHYCFG(0));
reg |= DWC3_GUSB2PHYCFG_PHYSOFTRST;
dwc3_writel(dwc->regs, DWC3_GUSB2PHYCFG(0), reg);
usb_phy_init(dwc->usb2_phy);
usb_phy_init(dwc->usb3_phy);
ret = phy_init(dwc->usb2_generic_phy);
if (ret < 0)
return ret;
ret = phy_init(dwc->usb3_generic_phy);
if (ret < 0) {
phy_exit(dwc->usb2_generic_phy);
return ret;
}
mdelay(100);
/* Clear USB3 PHY reset */
reg = dwc3_readl(dwc->regs, DWC3_GUSB3PIPECTL(0));
reg &= ~DWC3_GUSB3PIPECTL_PHYSOFTRST;
dwc3_writel(dwc->regs, DWC3_GUSB3PIPECTL(0), reg);
/* Clear USB2 PHY reset */
reg = dwc3_readl(dwc->regs, DWC3_GUSB2PHYCFG(0));
reg &= ~DWC3_GUSB2PHYCFG_PHYSOFTRST;
dwc3_writel(dwc->regs, DWC3_GUSB2PHYCFG(0), reg);
mdelay(100);
/* After PHYs are stable we can take Core out of reset state */
reg = dwc3_readl(dwc->regs, DWC3_GCTL);
reg &= ~DWC3_GCTL_CORESOFTRESET;
dwc3_writel(dwc->regs, DWC3_GCTL, reg);
return 0;
}
/**
* dwc3_core_soft_reset - Issues core soft reset and PHY reset
* @dwc: pointer to our context structure
*/
static void dwc3_core_soft_reset(struct dwc3 *dwc)
{
u32 reg;
if (dwc->core_reset_after_phy_init)
return dwc3_core_soft_reset_after_phy_init(dwc);
/* Before Resetting PHY, put Core in Reset */
reg = dwc3_readl(dwc->regs, DWC3_GCTL);
reg |= DWC3_GCTL_CORESOFTRESET;
dwc3_writel(dwc->regs, DWC3_GCTL, reg);
/* Bring up PHYs */
usb_phy_init(dwc->usb2_phy);
usb_phy_init(dwc->usb3_phy);
dwc3_notify_event(dwc, DWC3_CONTROLLER_RESET_EVENT);
/* Assert USB3 PHY reset */
reg = dwc3_readl(dwc->regs, DWC3_GUSB3PIPECTL(0));
reg |= DWC3_GUSB3PIPECTL_PHYSOFTRST;
dwc3_writel(dwc->regs, DWC3_GUSB3PIPECTL(0), reg);
/* Assert USB2 PHY reset */
reg = dwc3_readl(dwc->regs, DWC3_GUSB2PHYCFG(0));
reg |= DWC3_GUSB2PHYCFG_PHYSOFTRST;
dwc3_writel(dwc->regs, DWC3_GUSB2PHYCFG(0), reg);
mdelay(100);
/* Clear USB3 PHY reset */
reg = dwc3_readl(dwc->regs, DWC3_GUSB3PIPECTL(0));
reg &= ~DWC3_GUSB3PIPECTL_PHYSOFTRST;
dwc3_writel(dwc->regs, DWC3_GUSB3PIPECTL(0), reg);
/* Clear USB2 PHY reset */
reg = dwc3_readl(dwc->regs, DWC3_GUSB2PHYCFG(0));
reg &= ~DWC3_GUSB2PHYCFG_PHYSOFTRST;
dwc3_writel(dwc->regs, DWC3_GUSB2PHYCFG(0), reg);
mdelay(100);
/* After PHYs are stable we can take Core out of reset state */
reg = dwc3_readl(dwc->regs, DWC3_GCTL);
reg &= ~DWC3_GCTL_CORESOFTRESET;
dwc3_writel(dwc->regs, DWC3_GCTL, reg);
dwc3_notify_event(dwc, DWC3_CONTROLLER_POST_RESET_EVENT);
}
static void dwc3_core_soft_reset(struct dwc3 *dwc)
{
u32 reg;
reg = dwc3_readl(dwc->regs, DWC3_GCTL);
reg |= DWC3_GCTL_CORESOFTRESET;
dwc3_writel(dwc->regs, DWC3_GCTL, reg);
dwc3_notify_event(dwc, DWC3_CONTROLLER_RESET_EVENT);
reg = dwc3_readl(dwc->regs, DWC3_GUSB3PIPECTL(0));
reg |= DWC3_GUSB3PIPECTL_PHYSOFTRST;
dwc3_writel(dwc->regs, DWC3_GUSB3PIPECTL(0), reg);
reg = dwc3_readl(dwc->regs, DWC3_GUSB2PHYCFG(0));
reg |= DWC3_GUSB2PHYCFG_PHYSOFTRST;
dwc3_writel(dwc->regs, DWC3_GUSB2PHYCFG(0), reg);
mdelay(10);
reg = dwc3_readl(dwc->regs, DWC3_GUSB3PIPECTL(0));
reg &= ~DWC3_GUSB3PIPECTL_PHYSOFTRST;
dwc3_writel(dwc->regs, DWC3_GUSB3PIPECTL(0), reg);
reg = dwc3_readl(dwc->regs, DWC3_GUSB2PHYCFG(0));
reg &= ~DWC3_GUSB2PHYCFG_PHYSOFTRST;
dwc3_writel(dwc->regs, DWC3_GUSB2PHYCFG(0), reg);
mdelay(10);
reg = dwc3_readl(dwc->regs, DWC3_GCTL);
reg &= ~DWC3_GCTL_CORESOFTRESET;
dwc3_writel(dwc->regs, DWC3_GCTL, reg);
dwc3_notify_event(dwc, DWC3_CONTROLLER_POST_RESET_EVENT);
}
/**
* dwc3_core_soft_reset - Issues core soft reset and PHY reset
* @dwc: pointer to our context structure
*/
static void dwc3_core_soft_reset(struct dwc3 *dwc)
{
u32 reg;
/* Before Resetting PHY, put Core in Reset */
reg = dwc3_readl(dwc->regs, DWC3_GCTL);
reg |= DWC3_GCTL_CORESOFTRESET;
dwc3_writel(dwc->regs, DWC3_GCTL, reg);
/* Assert USB3 PHY reset */
reg = dwc3_readl(dwc->regs, DWC3_GUSB3PIPECTL(0));
reg |= DWC3_GUSB3PIPECTL_PHYSOFTRST;
dwc3_writel(dwc->regs, DWC3_GUSB3PIPECTL(0), reg);
/* Assert USB2 PHY reset */
reg = dwc3_readl(dwc->regs, DWC3_GUSB2PHYCFG(0));
reg |= DWC3_GUSB2PHYCFG_PHYSOFTRST;
dwc3_writel(dwc->regs, DWC3_GUSB2PHYCFG(0), reg);
//usb_phy_init(dwc->usb3_phy);
dwc_usb3_phy_init();
mdelay(100);
/* Clear USB3 PHY reset */
reg = dwc3_readl(dwc->regs, DWC3_GUSB3PIPECTL(0));
reg &= ~DWC3_GUSB3PIPECTL_PHYSOFTRST;
dwc3_writel(dwc->regs, DWC3_GUSB3PIPECTL(0), reg);
/* Clear USB2 PHY reset */
reg = dwc3_readl(dwc->regs, DWC3_GUSB2PHYCFG(0));
reg &= ~DWC3_GUSB2PHYCFG_PHYSOFTRST;
dwc3_writel(dwc->regs, DWC3_GUSB2PHYCFG(0), reg);
mdelay(100);
/* After PHYs are stable we can take Core out of reset state */
reg = dwc3_readl(dwc->regs, DWC3_GCTL);
reg &= ~DWC3_GCTL_CORESOFTRESET;
dwc3_writel(dwc->regs, DWC3_GCTL, reg);
}
/**
* Peforms core soft reset and PHY soft reset of HS and SS PHYs.
* If used as a part of POR or init sequence it is recommended
* that we should perform hard reset and init of the PHYs prior
* to invoking this function.
* @dwc: pointer to our context structure
*/
static void dwc3_core_and_phy_soft_reset(struct dwc3 *dwc)
{
u32 reg;
/* Before Resetting PHY, put Core in Reset */
reg = dwc3_readl(dwc->regs, DWC3_GCTL);
reg |= DWC3_GCTL_CORESOFTRESET;
dwc3_writel(dwc->regs, DWC3_GCTL, reg);
/* Assert USB3 PHY reset */
reg = dwc3_readl(dwc->regs, DWC3_GUSB3PIPECTL(0));
reg |= DWC3_GUSB3PIPECTL_PHYSOFTRST;
dwc3_writel(dwc->regs, DWC3_GUSB3PIPECTL(0), reg);
usleep_range(1000, 1200);
/* Clear USB3 PHY reset */
reg = dwc3_readl(dwc->regs, DWC3_GUSB3PIPECTL(0));
reg &= ~DWC3_GUSB3PIPECTL_PHYSOFTRST;
dwc3_writel(dwc->regs, DWC3_GUSB3PIPECTL(0), reg);
reg = dwc3_readl(dwc->regs, DWC3_GUSB3PIPECTL(0));
reg &= ~DWC3_GUSB3PIPECTL_DELAYP1TRANS;
dwc3_writel(dwc->regs, DWC3_GUSB3PIPECTL(0), reg);
/* Assert USB2 PHY reset */
reg = dwc3_readl(dwc->regs, DWC3_GUSB2PHYCFG(0));
reg |= DWC3_GUSB2PHYCFG_PHYSOFTRST;
dwc3_writel(dwc->regs, DWC3_GUSB2PHYCFG(0), reg);
usleep_range(1000, 1200);
/* Clear USB2 PHY reset */
reg = dwc3_readl(dwc->regs, DWC3_GUSB2PHYCFG(0));
reg &= ~DWC3_GUSB2PHYCFG_PHYSOFTRST;
dwc3_writel(dwc->regs, DWC3_GUSB2PHYCFG(0), reg);
usleep_range(200, 500);
/* After PHYs are stable we can take Core out of reset state */
reg = dwc3_readl(dwc->regs, DWC3_GCTL);
reg &= ~DWC3_GCTL_CORESOFTRESET;
dwc3_writel(dwc->regs, DWC3_GCTL, reg);
usleep_range(1000, 1200);
}
/**
* dwc3_core_init - Low-level initialization of DWC3 Core
* @dwc: Pointer to our controller context structure
*
* Returns 0 on success otherwise negative errno.
*/
static int dwc3_core_init(struct dwc3 *dwc)
{
unsigned long timeout;
u32 reg;
int ret;
reg = dwc3_readl(dwc->regs, DWC3_GSNPSID);
/* This should read as U3 followed by revision number */
if ((reg & DWC3_GSNPSID_MASK) != 0x55330000) {
dev_err(dwc->dev, "this is not a DesignWare USB3 DRD Core\n");
ret = -ENODEV;
goto err0;
}
dwc->revision = reg;
/* issue device SoftReset too */
timeout = jiffies + msecs_to_jiffies(500);
dwc3_writel(dwc->regs, DWC3_DCTL, DWC3_DCTL_CSFTRST);
do {
reg = dwc3_readl(dwc->regs, DWC3_DCTL);
if (!(reg & DWC3_DCTL_CSFTRST))
break;
if (time_after(jiffies, timeout)) {
dev_err(dwc->dev, "Reset Timed Out\n");
ret = -ETIMEDOUT;
goto err0;
}
cpu_relax();
} while (true);
dwc3_core_soft_reset(dwc);
reg = dwc3_readl(dwc->regs, DWC3_GCTL);
reg &= ~DWC3_GCTL_SCALEDOWN_MASK;
reg &= ~DWC3_GCTL_DISSCRAMBLE;
switch (DWC3_GHWPARAMS1_EN_PWROPT(dwc->hwparams.hwparams1)) {
case DWC3_GHWPARAMS1_EN_PWROPT_CLK:
reg &= ~DWC3_GCTL_DSBLCLKGTNG;
break;
default:
dev_dbg(dwc->dev, "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 (dwc->revision < DWC3_REVISION_190A)
reg |= DWC3_GCTL_U2RSTECN;
dwc3_core_num_eps(dwc);
dwc3_writel(dwc->regs, DWC3_GCTL, reg);
/*
* The default value of GUCTL[31:22] should be 0x8. But on cores
* revision < 2.30a, the default value is mistakenly overridden
* with 0x0. Restore the correct default value.
*/
if (dwc->revision < DWC3_REVISION_230A) {
reg = dwc3_readl(dwc->regs, DWC3_GUCTL);
reg &= ~DWC3_GUCTL_REFCLKPER;
reg |= 0x8 << __ffs(DWC3_GUCTL_REFCLKPER);
dwc3_writel(dwc->regs, DWC3_GUCTL, reg);
}
/*
* Currently, the default and the recommended value for GUSB3PIPECTL
* [21:19] in the RTL is 3'b100 or 32 consecutive errors. Based on
* analysis and experiments in the lab, it is found that there is a
* relatively low probability of getting 32 consecutive word errors
* in the presence of random recovered noise (during electrical idle).
* This can delay the entry to a low power state such that for
* applications where the link stays in a non-U0 state for a short
* duration (< 1 microsecond), the local PHY does not enter the low
* power state prior to receiving a potential LFPS wakeup. This causes
* the PHY CDR (Clock and Data Recovery) operation to be unstable for
* some Synopsys PHYs.
*
* The proposal now is to change the default and the recommended value
* for GUSB3PIPECTL[21:19] in the RTL from 3'b100 to a minimum of
* 3'b001. Perform the same in software for controllers prior to 2.30a
* revision.
*/
if (dwc->revision < DWC3_REVISION_230A) {
reg = dwc3_readl(dwc->regs, DWC3_GUSB3PIPECTL(0));
reg &= ~DWC3_GUSB3PIPECTL_DELAY_P1P2P3;
reg |= 1 << __ffs(DWC3_GUSB3PIPECTL_DELAY_P1P2P3);
/*
* Receiver Detection in U3/Rx.Det is mistakenly disabled in
* cores < 2.30a. Fix it here.
*/
reg &= ~DWC3_GUSB3PIPECTL_DIS_RXDET_U3_RXDET;
dwc3_writel(dwc->regs, DWC3_GUSB3PIPECTL(0), reg);
}
/*
* clear Elastic buffer mode in GUSBPIPE_CTRL(0) register, otherwise
* it results in high link errors and could cause SS mode transfer
* failure.
*/
if (!dwc->nominal_elastic_buffer) {
reg = dwc3_readl(dwc->regs, DWC3_GUSB3PIPECTL(0));
reg &= ~DWC3_GUSB3PIPECTL_ELASTIC_BUF_MODE;
dwc3_writel(dwc->regs, DWC3_GUSB3PIPECTL(0), reg);
}
return 0;
err0:
return ret;
}
void setup_dwc3(void)
{
u32 reg;
u32 revision;
revision = read32(USB_HOST3_PHY_BASE + DWC3_GSNPSID);
/* This should read as U3 followed by revision number */
if ((revision & DWC3_GSNPSID_MASK) != 0x55330000)
printk(BIOS_INFO, "Error in reading Version\n");
printk(BIOS_INFO, "Version = %x\n", revision);
/* issue device SoftReset too */
write32(USB_HOST3_PHY_BASE + DWC3_DCTL, DWC3_DCTL_CSFTRST);
do {
reg = read32(USB_HOST3_PHY_BASE + DWC3_DCTL);
if (!(reg & DWC3_DCTL_CSFTRST))
break;
udelay(10);
} while (true);
printk(BIOS_INFO, "software reset done\n");
/* Before Resetting PHY, put Core in Reset */
reg = read32(USB_HOST3_PHY_BASE + DWC3_GCTL);
reg |= DWC3_GCTL_CORESOFTRESET;
write32(USB_HOST3_PHY_BASE + DWC3_GCTL, reg);
/* Assert USB3 PHY reset */
reg = read32(USB_HOST3_PHY_BASE + DWC3_GUSB3PIPECTL(0));
reg |= DWC3_GUSB3PIPECTL_PHYSOFTRST;
write32(USB_HOST3_PHY_BASE + DWC3_GUSB3PIPECTL(0), reg);
/* Assert USB2 PHY reset */
reg = read32(USB_HOST3_PHY_BASE + DWC3_GUSB2PHYCFG(0));
reg |= DWC3_GUSB2PHYCFG_PHYSOFTRST;
write32(USB_HOST3_PHY_BASE + DWC3_GUSB2PHYCFG(0), reg);
qcom_baldur_hs_phy_init();
qcom_uni_ss_phy_init();
mdelay(100);
/* Clear USB3 PHY reset */
reg = read32(USB_HOST3_PHY_BASE + DWC3_GUSB3PIPECTL(0));
reg &= ~DWC3_GUSB3PIPECTL_PHYSOFTRST;
write32(USB_HOST3_PHY_BASE + DWC3_GUSB3PIPECTL(0), reg);
/* Clear USB2 PHY reset */
reg = read32(USB_HOST3_PHY_BASE + DWC3_GUSB2PHYCFG(0));
reg &= ~DWC3_GUSB2PHYCFG_PHYSOFTRST;
write32(USB_HOST3_PHY_BASE + DWC3_GUSB2PHYCFG(0), reg);
mdelay(100);
/* After PHYs are stable we can take Core out of reset state */
reg = read32(USB_HOST3_PHY_BASE + DWC3_GCTL);
reg &= ~DWC3_GCTL_CORESOFTRESET;
write32(USB_HOST3_PHY_BASE + DWC3_GCTL, reg);
#if 0
/* Enable Suspend USB2.0 HS/FS/LS PHY (SusPHY) */
reg = read32(USB_HOST3_PHY_BASE + DWC3_GUSB2PHYCFG(0));
reg |= DWC3_GUSB2PHYCFG_SUSPHY;
write32(USB_HOST3_PHY_BASE + DWC3_GUSB2PHYCFG(0), reg);
/* Enable Suspend USB3.0 SS PHY (Suspend_en) */
reg = read32(USB_HOST3_PHY_BASE + DWC3_GUSB3PIPECTL(0));
reg |= DWC3_GUSB3PIPECTL_SUSPHY;
write32(USB_HOST3_PHY_BASE + DWC3_GUSB3PIPECTL(0), reg);
#endif
/* configure controller in Host mode */
reg = read32(USB_HOST3_PHY_BASE + DWC3_GCTL);
reg &= ~(DWC3_GCTL_PRTCAPDIR(DWC3_GCTL_PRTCAP_OTG));
reg |= DWC3_GCTL_PRTCAPDIR(0x1); /* host mode */
write32(USB_HOST3_PHY_BASE + DWC3_GCTL, reg);
printk(BIOS_INFO, "USB Host mode reg = %x\n", reg);
reg = read32(USB_HOST3_PHY_BASE + DWC3_GCTL);
reg &= ~DWC3_GCTL_SCALEDOWN_MASK;
reg &= ~DWC3_GCTL_DISSCRAMBLE;
reg &= ~DWC3_GCTL_DSBLCLKGTNG;
/*
* 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_190A)
reg |= DWC3_GCTL_U2RSTECN;
write32(USB_HOST3_PHY_BASE + DWC3_GCTL, reg);
}
/**
* dwc3_phy_setup - Configure USB PHY Interface of DWC3 Core
* @dwc: Pointer to our controller context structure
*
* Returns 0 on success. The USB PHY interfaces are configured but not
* initialized. The PHY interfaces and the PHYs get initialized together with
* the core in dwc3_core_init.
*/
static int dwc3_phy_setup(struct dwc3 *dwc)
{
u32 reg;
int ret;
reg = dwc3_readl(dwc->regs, DWC3_GUSB3PIPECTL(0));
/*
* Make sure UX_EXIT_PX is cleared as that causes issues with some
* PHYs. Also, this bit is not supposed to be used in normal operation.
*/
reg &= ~DWC3_GUSB3PIPECTL_UX_EXIT_PX;
/*
* Above 1.94a, it is recommended to set DWC3_GUSB3PIPECTL_SUSPHY
* to '0' during coreConsultant configuration. So default value
* will be '0' when the core is reset. Application needs to set it
* to '1' after the core initialization is completed.
*/
if (dwc->revision > DWC3_REVISION_194A)
reg |= DWC3_GUSB3PIPECTL_SUSPHY;
if (dwc->u2ss_inp3_quirk)
reg |= DWC3_GUSB3PIPECTL_U2SSINP3OK;
if (dwc->dis_rxdet_inp3_quirk)
reg |= DWC3_GUSB3PIPECTL_DISRXDETINP3;
if (dwc->req_p1p2p3_quirk)
reg |= DWC3_GUSB3PIPECTL_REQP1P2P3;
if (dwc->del_p1p2p3_quirk)
reg |= DWC3_GUSB3PIPECTL_DEP1P2P3_EN;
if (dwc->del_phy_power_chg_quirk)
reg |= DWC3_GUSB3PIPECTL_DEPOCHANGE;
if (dwc->lfps_filter_quirk)
reg |= DWC3_GUSB3PIPECTL_LFPSFILT;
if (dwc->rx_detect_poll_quirk)
reg |= DWC3_GUSB3PIPECTL_RX_DETOPOLL;
if (dwc->tx_de_emphasis_quirk)
reg |= DWC3_GUSB3PIPECTL_TX_DEEPH(dwc->tx_de_emphasis);
if (dwc->dis_u3_susphy_quirk)
reg &= ~DWC3_GUSB3PIPECTL_SUSPHY;
if (dwc->dis_del_phy_power_chg_quirk)
reg &= ~DWC3_GUSB3PIPECTL_DEPOCHANGE;
dwc3_writel(dwc->regs, DWC3_GUSB3PIPECTL(0), reg);
reg = dwc3_readl(dwc->regs, DWC3_GUSB2PHYCFG(0));
/* Select the HS PHY interface */
switch (DWC3_GHWPARAMS3_HSPHY_IFC(dwc->hwparams.hwparams3)) {
case DWC3_GHWPARAMS3_HSPHY_IFC_UTMI_ULPI:
if (dwc->hsphy_interface &&
!strncmp(dwc->hsphy_interface, "utmi", 4)) {
reg &= ~DWC3_GUSB2PHYCFG_ULPI_UTMI;
break;
} else if (dwc->hsphy_interface &&
!strncmp(dwc->hsphy_interface, "ulpi", 4)) {
reg |= DWC3_GUSB2PHYCFG_ULPI_UTMI;
dwc3_writel(dwc->regs, DWC3_GUSB2PHYCFG(0), reg);
} else {
/* Relying on default value. */
if (!(reg & DWC3_GUSB2PHYCFG_ULPI_UTMI))
break;
}
/* FALLTHROUGH */
case DWC3_GHWPARAMS3_HSPHY_IFC_ULPI:
ret = dwc3_ulpi_init(dwc);
if (ret)
return ret;
/* FALLTHROUGH */
default:
break;
}
switch (dwc->hsphy_mode) {
case USBPHY_INTERFACE_MODE_UTMI:
reg &= ~(DWC3_GUSB2PHYCFG_PHYIF_MASK |
DWC3_GUSB2PHYCFG_USBTRDTIM_MASK);
reg |= DWC3_GUSB2PHYCFG_PHYIF(UTMI_PHYIF_8_BIT) |
DWC3_GUSB2PHYCFG_USBTRDTIM(USBTRDTIM_UTMI_8_BIT);
break;
case USBPHY_INTERFACE_MODE_UTMIW:
reg &= ~(DWC3_GUSB2PHYCFG_PHYIF_MASK |
DWC3_GUSB2PHYCFG_USBTRDTIM_MASK);
reg |= DWC3_GUSB2PHYCFG_PHYIF(UTMI_PHYIF_16_BIT) |
DWC3_GUSB2PHYCFG_USBTRDTIM(USBTRDTIM_UTMI_16_BIT);
break;
default:
break;
}
/*
* Above 1.94a, it is recommended to set DWC3_GUSB2PHYCFG_SUSPHY to
* '0' during coreConsultant configuration. So default value will
* be '0' when the core is reset. Application needs to set it to
* '1' after the core initialization is completed.
*/
if (dwc->revision > DWC3_REVISION_194A)
reg |= DWC3_GUSB2PHYCFG_SUSPHY;
if (dwc->dis_u2_susphy_quirk)
reg &= ~DWC3_GUSB2PHYCFG_SUSPHY;
if (dwc->dis_enblslpm_quirk)
reg &= ~DWC3_GUSB2PHYCFG_ENBLSLPM;
if (dwc->dis_u2_freeclk_exists_quirk)
reg &= ~DWC3_GUSB2PHYCFG_U2_FREECLK_EXISTS;
dwc3_writel(dwc->regs, DWC3_GUSB2PHYCFG(0), reg);
return 0;
}
/**
* dwc3_phy_setup - Configure USB PHY Interface of DWC3 Core
* @dwc: Pointer to our controller context structure
*
* Returns 0 on success. The USB PHY interfaces are configured but not
* initialized. The PHY interfaces and the PHYs get initialized together with
* the core in dwc3_core_init.
*/
static int dwc3_phy_setup(struct dwc3 *dwc)
{
u32 reg;
int ret;
reg = dwc3_readl(dwc->regs, DWC3_GUSB3PIPECTL(0));
/*
* Above 1.94a, it is recommended to set DWC3_GUSB3PIPECTL_SUSPHY
* to '0' during coreConsultant configuration. So default value
* will be '0' when the core is reset. Application needs to set it
* to '1' after the core initialization is completed.
*/
if (dwc->revision > DWC3_REVISION_194A)
reg |= DWC3_GUSB3PIPECTL_SUSPHY;
if (dwc->u2ss_inp3_quirk)
reg |= DWC3_GUSB3PIPECTL_U2SSINP3OK;
if (dwc->req_p1p2p3_quirk)
reg |= DWC3_GUSB3PIPECTL_REQP1P2P3;
if (dwc->del_p1p2p3_quirk)
reg |= DWC3_GUSB3PIPECTL_DEP1P2P3_EN;
if (dwc->del_phy_power_chg_quirk)
reg |= DWC3_GUSB3PIPECTL_DEPOCHANGE;
if (dwc->lfps_filter_quirk)
reg |= DWC3_GUSB3PIPECTL_LFPSFILT;
if (dwc->rx_detect_poll_quirk)
reg |= DWC3_GUSB3PIPECTL_RX_DETOPOLL;
if (dwc->tx_de_emphasis_quirk)
reg |= DWC3_GUSB3PIPECTL_TX_DEEPH(dwc->tx_de_emphasis);
if (dwc->dis_u3_susphy_quirk)
reg &= ~DWC3_GUSB3PIPECTL_SUSPHY;
dwc3_writel(dwc->regs, DWC3_GUSB3PIPECTL(0), reg);
reg = dwc3_readl(dwc->regs, DWC3_GUSB2PHYCFG(0));
/* Select the HS PHY interface */
switch (DWC3_GHWPARAMS3_HSPHY_IFC(dwc->hwparams.hwparams3)) {
case DWC3_GHWPARAMS3_HSPHY_IFC_UTMI_ULPI:
if (dwc->hsphy_interface &&
!strncmp(dwc->hsphy_interface, "utmi", 4)) {
reg &= ~DWC3_GUSB2PHYCFG_ULPI_UTMI;
break;
} else if (dwc->hsphy_interface &&
!strncmp(dwc->hsphy_interface, "ulpi", 4)) {
reg |= DWC3_GUSB2PHYCFG_ULPI_UTMI;
dwc3_writel(dwc->regs, DWC3_GUSB2PHYCFG(0), reg);
} else {
/* Relying on default value. */
if (!(reg & DWC3_GUSB2PHYCFG_ULPI_UTMI))
break;
}
/* FALLTHROUGH */
case DWC3_GHWPARAMS3_HSPHY_IFC_ULPI:
/* Making sure the interface and PHY are operational */
ret = dwc3_soft_reset(dwc);
if (ret)
return ret;
udelay(1);
ret = dwc3_ulpi_init(dwc);
if (ret)
return ret;
/* FALLTHROUGH */
default:
break;
}
/*
* Above 1.94a, it is recommended to set DWC3_GUSB2PHYCFG_SUSPHY to
* '0' during coreConsultant configuration. So default value will
* be '0' when the core is reset. Application needs to set it to
* '1' after the core initialization is completed.
*/
if (dwc->revision > DWC3_REVISION_194A)
reg |= DWC3_GUSB2PHYCFG_SUSPHY;
if (dwc->dis_u2_susphy_quirk)
reg &= ~DWC3_GUSB2PHYCFG_SUSPHY;
if (dwc->dis_enblslpm_quirk)
reg &= ~DWC3_GUSB2PHYCFG_ENBLSLPM;
dwc3_writel(dwc->regs, DWC3_GUSB2PHYCFG(0), reg);
return 0;
}
static int dwc3_core_init(struct dwc3 *dwc)
{
unsigned long timeout;
u32 reg;
int ret;
reg = dwc3_readl(dwc->regs, DWC3_GSNPSID);
if ((reg & DWC3_GSNPSID_MASK) != 0x55330000) {
dev_err(dwc->dev, "this is not a DesignWare USB3 DRD Core\n");
ret = -ENODEV;
goto err0;
}
dwc->revision = reg;
timeout = jiffies + msecs_to_jiffies(500);
dwc3_writel(dwc->regs, DWC3_DCTL, DWC3_DCTL_CSFTRST);
do {
reg = dwc3_readl(dwc->regs, DWC3_DCTL);
if (!(reg & DWC3_DCTL_CSFTRST))
break;
if (time_after(jiffies, timeout)) {
dev_err(dwc->dev, "Reset Timed Out\n");
ret = -ETIMEDOUT;
goto err0;
}
cpu_relax();
} while (true);
dwc3_core_soft_reset(dwc);
dwc3_cache_hwparams(dwc);
reg = dwc3_readl(dwc->regs, DWC3_GCTL);
reg &= ~DWC3_GCTL_SCALEDOWN_MASK;
reg &= ~DWC3_GCTL_DISSCRAMBLE;
switch (DWC3_GHWPARAMS1_EN_PWROPT(dwc->hwparams.hwparams1)) {
case DWC3_GHWPARAMS1_EN_PWROPT_CLK:
reg &= ~DWC3_GCTL_DSBLCLKGTNG;
break;
default:
dev_dbg(dwc->dev, "No power optimization available\n");
}
if (dwc->revision < DWC3_REVISION_190A)
reg |= DWC3_GCTL_U2RSTECN;
dwc3_writel(dwc->regs, DWC3_GCTL, reg);
if (dwc->revision < DWC3_REVISION_230A) {
reg = dwc3_readl(dwc->regs, DWC3_GUCTL);
reg &= ~DWC3_GUCTL_REFCLKPER;
reg |= 0x8 << __ffs(DWC3_GUCTL_REFCLKPER);
dwc3_writel(dwc->regs, DWC3_GUCTL, reg);
}
if (dwc->revision < DWC3_REVISION_230A) {
reg = dwc3_readl(dwc->regs, DWC3_GUSB3PIPECTL(0));
reg &= ~DWC3_GUSB3PIPECTL_DELAY_P1P2P3;
reg |= 1 << __ffs(DWC3_GUSB3PIPECTL_DELAY_P1P2P3);
reg &= ~DWC3_GUSB3PIPECTL_DIS_RXDET_U3_RXDET;
dwc3_writel(dwc->regs, DWC3_GUSB3PIPECTL(0), reg);
}
reg = dwc3_readl(dwc->regs, DWC3_GUSB3PIPECTL(0));
reg &= ~DWC3_GUSB3PIPECTL_ELASTIC_BUF_MODE;
dwc3_writel(dwc->regs, DWC3_GUSB3PIPECTL(0), reg);
if (!dwc->ev_buffs) {
ret = dwc3_alloc_event_buffers(dwc, DWC3_EVENT_BUFFERS_SIZE);
if (ret) {
dev_err(dwc->dev, "failed to allocate event buffers\n");
ret = -ENOMEM;
goto err1;
}
}
ret = dwc3_event_buffers_setup(dwc);
if (ret) {
dev_err(dwc->dev, "failed to setup event buffers\n");
goto err1;
}
return 0;
err1:
dwc3_free_event_buffers(dwc);
err0:
return ret;
}