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path: root/drivers/usb/dwc3/core.c
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Diffstat (limited to 'drivers/usb/dwc3/core.c')
-rw-r--r--drivers/usb/dwc3/core.c183
1 files changed, 133 insertions, 50 deletions
diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c
index 1e91b803ee4e..09e7bedc5e1d 100644
--- a/drivers/usb/dwc3/core.c
+++ b/drivers/usb/dwc3/core.c
@@ -100,7 +100,10 @@ static int dwc3_get_dr_mode(struct dwc3 *dwc)
return 0;
}
-void dwc3_set_mode(struct dwc3 *dwc, u32 mode)
+static void dwc3_event_buffers_cleanup(struct dwc3 *dwc);
+static int dwc3_event_buffers_setup(struct dwc3 *dwc);
+
+static void dwc3_set_prtcap(struct dwc3 *dwc, u32 mode)
{
u32 reg;
@@ -110,6 +113,93 @@ void dwc3_set_mode(struct dwc3 *dwc, u32 mode)
dwc3_writel(dwc->regs, DWC3_GCTL, reg);
}
+static void __dwc3_set_mode(struct work_struct *work)
+{
+ struct dwc3 *dwc = work_to_dwc(work);
+ unsigned long flags;
+ int ret;
+
+ if (!dwc->desired_dr_role)
+ return;
+
+ if (dwc->desired_dr_role == dwc->current_dr_role)
+ return;
+
+ if (dwc->dr_mode != USB_DR_MODE_OTG)
+ return;
+
+ switch (dwc->current_dr_role) {
+ case DWC3_GCTL_PRTCAP_HOST:
+ dwc3_host_exit(dwc);
+ break;
+ case DWC3_GCTL_PRTCAP_DEVICE:
+ dwc3_gadget_exit(dwc);
+ dwc3_event_buffers_cleanup(dwc);
+ break;
+ default:
+ break;
+ }
+
+ spin_lock_irqsave(&dwc->lock, flags);
+
+ dwc3_set_prtcap(dwc, dwc->desired_dr_role);
+
+ dwc->current_dr_role = dwc->desired_dr_role;
+
+ spin_unlock_irqrestore(&dwc->lock, flags);
+
+ switch (dwc->desired_dr_role) {
+ case DWC3_GCTL_PRTCAP_HOST:
+ ret = dwc3_host_init(dwc);
+ if (ret)
+ dev_err(dwc->dev, "failed to initialize host\n");
+ break;
+ case DWC3_GCTL_PRTCAP_DEVICE:
+ dwc3_event_buffers_setup(dwc);
+ ret = dwc3_gadget_init(dwc);
+ if (ret)
+ dev_err(dwc->dev, "failed to initialize peripheral\n");
+ break;
+ default:
+ break;
+ }
+}
+
+void dwc3_set_mode(struct dwc3 *dwc, u32 mode)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&dwc->lock, flags);
+ dwc->desired_dr_role = mode;
+ spin_unlock_irqrestore(&dwc->lock, flags);
+
+ queue_work(system_freezable_wq, &dwc->drd_work);
+}
+
+static int dwc3_set_suspend_clk(struct dwc3 *dwc)
+{
+ u32 reg, scale;
+
+ /*
+ * DWC3_GCTL.PWRDNSCALE: The USB3 suspend_clk input replaces
+ * pipe3_rx_pclk as a clock source to a small part of the USB3
+ * core that operates when the SS PHY is in its lowest power
+ * (P3) state, and therefore does not provide a clock.
+ * The Power Down Scale field specifies how many suspend_clk
+ * periods fit into a 16 kHz clock period. When performing the
+ * division, round up the remainder.
+ */
+ if (!device_property_read_u32(dwc->dev, "snps,power-down-scale",
+ &scale)) {
+ reg = dwc3_readl(dwc->regs, DWC3_GCTL);
+ reg &= ~(DWC3_GCTL_PWRDNSCALE_MASK);
+ reg |= DWC3_GCTL_PWRDNSCALE(scale);
+ dwc3_writel(dwc->regs, DWC3_GCTL, reg);
+ }
+
+ return 0;
+}
+
u32 dwc3_core_fifo_space(struct dwc3_ep *dep, u8 type)
{
struct dwc3 *dwc = dep->dwc;
@@ -663,6 +753,9 @@ static int dwc3_core_init(struct dwc3 *dwc)
if (ret)
goto err0;
+ /* Set suspend_clk */
+ dwc3_set_suspend_clk(dwc);
+
ret = dwc3_phy_setup(dwc);
if (ret)
goto err0;
@@ -760,21 +853,6 @@ static int dwc3_core_init(struct dwc3 *dwc)
goto err4;
}
- switch (dwc->dr_mode) {
- case USB_DR_MODE_PERIPHERAL:
- dwc3_set_mode(dwc, DWC3_GCTL_PRTCAP_DEVICE);
- break;
- case USB_DR_MODE_HOST:
- dwc3_set_mode(dwc, DWC3_GCTL_PRTCAP_HOST);
- break;
- case USB_DR_MODE_OTG:
- dwc3_set_mode(dwc, DWC3_GCTL_PRTCAP_OTG);
- break;
- default:
- dev_warn(dwc->dev, "Unsupported mode %d\n", dwc->dr_mode);
- break;
- }
-
/*
* ENDXFER polling is available on version 3.10a and later of
* the DWC_usb3 controller. It is NOT available in the
@@ -882,6 +960,8 @@ static int dwc3_core_init_mode(struct dwc3 *dwc)
switch (dwc->dr_mode) {
case USB_DR_MODE_PERIPHERAL:
+ dwc->current_dr_role = DWC3_GCTL_PRTCAP_DEVICE;
+ dwc3_set_prtcap(dwc, DWC3_GCTL_PRTCAP_DEVICE);
ret = dwc3_gadget_init(dwc);
if (ret) {
if (ret != -EPROBE_DEFER)
@@ -890,6 +970,8 @@ static int dwc3_core_init_mode(struct dwc3 *dwc)
}
break;
case USB_DR_MODE_HOST:
+ dwc->current_dr_role = DWC3_GCTL_PRTCAP_HOST;
+ dwc3_set_prtcap(dwc, DWC3_GCTL_PRTCAP_HOST);
ret = dwc3_host_init(dwc);
if (ret) {
if (ret != -EPROBE_DEFER)
@@ -898,17 +980,11 @@ static int dwc3_core_init_mode(struct dwc3 *dwc)
}
break;
case USB_DR_MODE_OTG:
- ret = dwc3_host_init(dwc);
- if (ret) {
- if (ret != -EPROBE_DEFER)
- dev_err(dev, "failed to initialize host\n");
- return ret;
- }
-
- ret = dwc3_gadget_init(dwc);
+ INIT_WORK(&dwc->drd_work, __dwc3_set_mode);
+ ret = dwc3_drd_init(dwc);
if (ret) {
if (ret != -EPROBE_DEFER)
- dev_err(dev, "failed to initialize gadget\n");
+ dev_err(dev, "failed to initialize dual-role\n");
return ret;
}
break;
@@ -930,8 +1006,7 @@ static void dwc3_core_exit_mode(struct dwc3 *dwc)
dwc3_host_exit(dwc);
break;
case USB_DR_MODE_OTG:
- dwc3_host_exit(dwc);
- dwc3_gadget_exit(dwc);
+ dwc3_drd_exit(dwc);
break;
default:
/* do nothing */
@@ -1061,6 +1136,19 @@ static int dwc3_probe(struct platform_device *pdev)
dwc->hird_threshold = hird_threshold
| (dwc->is_utmi_l1_suspend << 4);
+ if (dwc->dr_mode == USB_DR_MODE_OTG) {
+ dwc->otg_caps.otg_rev = 0x0300;
+ dwc->otg_caps.hnp_support = true;
+ dwc->otg_caps.srp_support = true;
+ dwc->otg_caps.adp_support = true;
+
+ /* Update otg capabilities by DT properties */
+ ret = of_usb_update_otg_caps(dev->of_node,
+ &dwc->otg_caps);
+ if (ret)
+ goto err0;
+ }
+
platform_set_drvdata(pdev, dwc);
dwc3_cache_hwparams(dwc);
@@ -1206,21 +1294,19 @@ static int dwc3_suspend_common(struct dwc3 *dwc)
{
unsigned long flags;
- switch (dwc->dr_mode) {
- case USB_DR_MODE_PERIPHERAL:
- case USB_DR_MODE_OTG:
+ switch (dwc->current_dr_role) {
+ case DWC3_GCTL_PRTCAP_DEVICE:
spin_lock_irqsave(&dwc->lock, flags);
dwc3_gadget_suspend(dwc);
spin_unlock_irqrestore(&dwc->lock, flags);
+ dwc3_core_exit(dwc);
break;
- case USB_DR_MODE_HOST:
+ case DWC3_GCTL_PRTCAP_HOST:
default:
/* do nothing */
break;
}
- dwc3_core_exit(dwc);
-
return 0;
}
@@ -1229,18 +1315,17 @@ static int dwc3_resume_common(struct dwc3 *dwc)
unsigned long flags;
int ret;
- ret = dwc3_core_init(dwc);
- if (ret)
- return ret;
+ switch (dwc->current_dr_role) {
+ case DWC3_GCTL_PRTCAP_DEVICE:
+ ret = dwc3_core_init(dwc);
+ if (ret)
+ return ret;
- switch (dwc->dr_mode) {
- case USB_DR_MODE_PERIPHERAL:
- case USB_DR_MODE_OTG:
spin_lock_irqsave(&dwc->lock, flags);
dwc3_gadget_resume(dwc);
spin_unlock_irqrestore(&dwc->lock, flags);
- /* FALLTHROUGH */
- case USB_DR_MODE_HOST:
+ break;
+ case DWC3_GCTL_PRTCAP_HOST:
default:
/* do nothing */
break;
@@ -1251,7 +1336,7 @@ static int dwc3_resume_common(struct dwc3 *dwc)
static int dwc3_runtime_checks(struct dwc3 *dwc)
{
- switch (dwc->dr_mode) {
+ switch (dwc->current_dr_role) {
case USB_DR_MODE_PERIPHERAL:
case USB_DR_MODE_OTG:
if (dwc->connected)
@@ -1294,12 +1379,11 @@ static int dwc3_runtime_resume(struct device *dev)
if (ret)
return ret;
- switch (dwc->dr_mode) {
- case USB_DR_MODE_PERIPHERAL:
- case USB_DR_MODE_OTG:
+ switch (dwc->current_dr_role) {
+ case DWC3_GCTL_PRTCAP_DEVICE:
dwc3_gadget_process_pending_events(dwc);
break;
- case USB_DR_MODE_HOST:
+ case DWC3_GCTL_PRTCAP_HOST:
default:
/* do nothing */
break;
@@ -1315,13 +1399,12 @@ static int dwc3_runtime_idle(struct device *dev)
{
struct dwc3 *dwc = dev_get_drvdata(dev);
- switch (dwc->dr_mode) {
- case USB_DR_MODE_PERIPHERAL:
- case USB_DR_MODE_OTG:
+ switch (dwc->current_dr_role) {
+ case DWC3_GCTL_PRTCAP_DEVICE:
if (dwc3_runtime_checks(dwc))
return -EBUSY;
break;
- case USB_DR_MODE_HOST:
+ case DWC3_GCTL_PRTCAP_HOST:
default:
/* do nothing */
break;
generated by cgit v1.2.3 (git 2.0.4) at 2024-06-02 06:39:21 +0000