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| author | João Loureiro <joaofl@gmail.com> | 2021-03-17 16:52:21 +0100 |
|---|---|---|
| committer | Marek Vasut <marex@denx.de> | 2021-06-09 10:54:26 +0200 |
| commit | dcd2bbe0510d7d47d745eeea063496a83cb3b08e (patch) | |
| tree | 67f60ff5b88a5d31f803e81f39608443b61009f6 | |
| parent | c2d21e0ac087a153f1c4632e4ce46668bbf83633 (diff) | |
| download | u-boot-dcd2bbe0510d7d47d745eeea063496a83cb3b08e.tar.gz u-boot-dcd2bbe0510d7d47d745eeea063496a83cb3b08e.tar.xz u-boot-dcd2bbe0510d7d47d745eeea063496a83cb3b08e.zip | |
usb: dwc2: Avoid delay when initializing USB peripheral by dwc2
When `usb start` is called on the terminal, the dwc2 driver will try
to start every USB device as host first, even if it is explicitly
configured as peripheral in the device tree (dr_mode = "peripheral").
So to avoid an unwanted 15 seconds delay when initializing the usb
(one second per channel = 1s x 15), this patch adds a check to the
initialization, and will skip host initialization of the device is
explicitly set as peripheral. The checking is already done similarly
in the `drivers/usb/gadget/dwc2_udc_otg.c` driver.
Signed-off-by: João Loureiro <joaofl@gmail.com>
| -rw-r--r-- | drivers/usb/host/dwc2.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/drivers/usb/host/dwc2.c b/drivers/usb/host/dwc2.c index ec643e9f45..43cc2e0433 100644 --- a/drivers/usb/host/dwc2.c +++ b/drivers/usb/host/dwc2.c @@ -21,6 +21,7 @@ #include <asm/io.h> #include <dm/device_compat.h> #include <linux/delay.h> +#include <linux/usb/otg.h> #include <power/regulator.h> #include <reset.h> @@ -1204,7 +1205,13 @@ static int dwc2_init_common(struct udevice *dev, struct dwc2_priv *priv) #endif dwc_otg_core_init(dev); - dwc_otg_core_host_init(dev, regs); + + if (usb_get_dr_mode(dev_ofnode(dev)) == USB_DR_MODE_PERIPHERAL) { + dev_dbg(dev, "USB device %s dr_mode set to %d. Skipping host_init.\n", + dev->name, usb_get_dr_mode(dev_ofnode(dev))); + } else { + dwc_otg_core_host_init(dev, regs); + } clrsetbits_le32(®s->hprt0, DWC2_HPRT0_PRTENA | DWC2_HPRT0_PRTCONNDET | DWC2_HPRT0_PRTENCHNG | |