usb: dwc2: gadget: add reset flag in init function
Add a flag to request physical reset of the controller when
s3c_hsotg_core_init_disconnected is called.
During the usb reset, controller must not be fully reconfigured and
resetted. Else this leads to shorter chirp-k duration during
enumeration.
Tested-by: Robert Baldyga <r.baldyga@samsung.com>
Acked-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Gregory Herrero <gregory.herrero@intel.com>
Signed-off-by: Mian Yousaf Kaukab <yousaf.kaukab@intel.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
diff --git a/drivers/usb/dwc2/core.h b/drivers/usb/dwc2/core.h
index 485b195..f74304b 100644
--- a/drivers/usb/dwc2/core.h
+++ b/drivers/usb/dwc2/core.h
@@ -999,7 +999,8 @@
extern int s3c_hsotg_suspend(struct dwc2_hsotg *dwc2);
extern int s3c_hsotg_resume(struct dwc2_hsotg *dwc2);
extern int dwc2_gadget_init(struct dwc2_hsotg *hsotg, int irq);
-extern void s3c_hsotg_core_init_disconnected(struct dwc2_hsotg *dwc2);
+extern void s3c_hsotg_core_init_disconnected(struct dwc2_hsotg *dwc2,
+ bool reset);
extern void s3c_hsotg_core_connect(struct dwc2_hsotg *hsotg);
extern void s3c_hsotg_disconnect(struct dwc2_hsotg *dwc2);
#else
@@ -1011,7 +1012,8 @@
{ return 0; }
static inline int dwc2_gadget_init(struct dwc2_hsotg *hsotg, int irq)
{ return 0; }
-static inline void s3c_hsotg_core_init_disconnected(struct dwc2_hsotg *dwc2) {}
+static inline void s3c_hsotg_core_init_disconnected(struct dwc2_hsotg *dwc2,
+ bool reset) {}
static inline void s3c_hsotg_core_connect(struct dwc2_hsotg *hsotg) {}
static inline void s3c_hsotg_disconnect(struct dwc2_hsotg *dwc2) {}
#endif
diff --git a/drivers/usb/dwc2/gadget.c b/drivers/usb/dwc2/gadget.c
index 5e91cf15..3cf9c6a 100644
--- a/drivers/usb/dwc2/gadget.c
+++ b/drivers/usb/dwc2/gadget.c
@@ -2271,9 +2271,13 @@
*
* Issue a soft reset to the core, and await the core finishing it.
*/
-void s3c_hsotg_core_init_disconnected(struct dwc2_hsotg *hsotg)
+void s3c_hsotg_core_init_disconnected(struct dwc2_hsotg *hsotg,
+ bool is_usb_reset)
{
- s3c_hsotg_corereset(hsotg);
+ u32 val;
+
+ if (!is_usb_reset)
+ s3c_hsotg_corereset(hsotg);
/*
* we must now enable ep0 ready for host detection and then
@@ -2286,7 +2290,8 @@
s3c_hsotg_init_fifo(hsotg);
- __orr32(hsotg->regs + DCTL, DCTL_SFTDISCON);
+ if (!is_usb_reset)
+ __orr32(hsotg->regs + DCTL, DCTL_SFTDISCON);
writel(1 << 18 | DCFG_DEVSPD_HS, hsotg->regs + DCFG);
@@ -2357,9 +2362,11 @@
s3c_hsotg_ctrl_epint(hsotg, 0, 0, 1);
s3c_hsotg_ctrl_epint(hsotg, 0, 1, 1);
- __orr32(hsotg->regs + DCTL, DCTL_PWRONPRGDONE);
- udelay(10); /* see openiboot */
- __bic32(hsotg->regs + DCTL, DCTL_PWRONPRGDONE);
+ if (!is_usb_reset) {
+ __orr32(hsotg->regs + DCTL, DCTL_PWRONPRGDONE);
+ udelay(10); /* see openiboot */
+ __bic32(hsotg->regs + DCTL, DCTL_PWRONPRGDONE);
+ }
dev_dbg(hsotg->dev, "DCTL=0x%08x\n", readl(hsotg->regs + DCTL));
@@ -2388,8 +2395,10 @@
readl(hsotg->regs + DOEPCTL0));
/* clear global NAKs */
- writel(DCTL_CGOUTNAK | DCTL_CGNPINNAK | DCTL_SFTDISCON,
- hsotg->regs + DCTL);
+ val = DCTL_CGOUTNAK | DCTL_CGNPINNAK;
+ if (!is_usb_reset)
+ val |= DCTL_SFTDISCON;
+ __orr32(hsotg->regs + DCTL, val);
/* must be at-least 3ms to allow bus to see disconnect */
mdelay(3);
@@ -2482,7 +2491,7 @@
kill_all_requests(hsotg, hsotg->eps_out[0],
-ECONNRESET);
- s3c_hsotg_core_init_disconnected(hsotg);
+ s3c_hsotg_core_init_disconnected(hsotg, true);
s3c_hsotg_core_connect(hsotg);
}
}
@@ -3052,7 +3061,7 @@
spin_lock_irqsave(&hsotg->lock, flags);
s3c_hsotg_init(hsotg);
- s3c_hsotg_core_init_disconnected(hsotg);
+ s3c_hsotg_core_init_disconnected(hsotg, false);
hsotg->enabled = 0;
spin_unlock_irqrestore(&hsotg->lock, flags);
@@ -3171,7 +3180,7 @@
if (is_active) {
/* Kill any ep0 requests as controller will be reinitialized */
kill_all_requests(hsotg, hsotg->eps_out[0], -ECONNRESET);
- s3c_hsotg_core_init_disconnected(hsotg);
+ s3c_hsotg_core_init_disconnected(hsotg, false);
if (hsotg->enabled)
s3c_hsotg_core_connect(hsotg);
} else {
@@ -4097,7 +4106,7 @@
s3c_hsotg_phy_enable(hsotg);
spin_lock_irqsave(&hsotg->lock, flags);
- s3c_hsotg_core_init_disconnected(hsotg);
+ s3c_hsotg_core_init_disconnected(hsotg, false);
if (hsotg->enabled)
s3c_hsotg_core_connect(hsotg);
spin_unlock_irqrestore(&hsotg->lock, flags);
diff --git a/drivers/usb/dwc2/hcd.c b/drivers/usb/dwc2/hcd.c
index 4a9bcdd..c78c874 100644
--- a/drivers/usb/dwc2/hcd.c
+++ b/drivers/usb/dwc2/hcd.c
@@ -1373,7 +1373,7 @@
hsotg->op_state = OTG_STATE_B_PERIPHERAL;
dwc2_core_init(hsotg, false, -1);
dwc2_enable_global_interrupts(hsotg);
- s3c_hsotg_core_init_disconnected(hsotg);
+ s3c_hsotg_core_init_disconnected(hsotg, false);
s3c_hsotg_core_connect(hsotg);
} else {
/* A-Device connector (Host Mode) */