diff options
Diffstat (limited to 'drivers/usb/dwc3/core.c')
| -rw-r--r-- | drivers/usb/dwc3/core.c | 19 |
1 files changed, 9 insertions, 10 deletions
diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c index 443e4fb9b8f..6aa09133998 100644 --- a/drivers/usb/dwc3/core.c +++ b/drivers/usb/dwc3/core.c @@ -241,6 +241,15 @@ static int __devinit dwc3_core_init(struct dwc3 *dwc) 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 & DWC3_GSNPSREV_MASK; + dwc3_core_soft_reset(dwc); /* issue device SoftReset too */ @@ -260,16 +269,6 @@ static int __devinit dwc3_core_init(struct dwc3 *dwc) cpu_relax(); } while (true); - 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 & DWC3_GSNPSREV_MASK; - ret = dwc3_alloc_event_buffers(dwc, DWC3_EVENT_BUFFERS_NUM, DWC3_EVENT_BUFFERS_SIZE); if (ret) { |