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Code Issues

ramips: awake rt305x USB controller

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Because of Ralink uboot set USB controller into sleep mode [1]
we check it and awake controller before any registers access.
Fix ticket #21396 [2]

[1] http://marc.info/?l=linux-usb&m=137398626102108&w=2
[2] https://dev.openwrt.org/ticket/21396

Signed-Off-By: Serge Vasilugin <vasilugin@yandex.ru>

SVN-Revision: 49212
This commit is contained in:
John Crispin 2016-04-21 19:47:02 +00:00
parent 37b50fdb92
commit a6c7c0029e
1 changed files with 15 additions and 0 deletions
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15
target/linux/ramips/patches-4.4/0069-awake-rt305x-dwc2-controller.patch Normal file
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@ -0,0 +1,15 @@
--- a/drivers/usb/dwc2/platform.c
+++ b/drivers/usb/dwc2/platform.c
@@ -375,6 +375,12 @@ static int dwc2_driver_probe(struct plat
dev_dbg(&dev->dev, "mapped PA %08lx to VA %p\n",
(unsigned long)res->start, hsotg->regs);
+ /* Enable USB port before any regs access */
+ if(dwc2_readl(hsotg->regs + PCGCTL) & 0x0f) {
+ dwc2_writel(0x00, hsotg->regs + PCGCTL);
+ /* TODO: mdelay(25) here? vendor driver don't use it */
+ }
+
hsotg->dr_mode = usb_get_dr_mode(&dev->dev);
if (IS_ENABLED(CONFIG_USB_DWC2_HOST) &&
hsotg->dr_mode != USB_DR_MODE_HOST) {