[PATCH 1/1] usb: gadget: aspeed: fix stop dma register setting.
From: Ryan Chen <ryan_chen@aspeedtech.com>
Date: 2021-01-08 08:15:05
Also in:
linux-aspeed, linux-usb, lkml
Subsystem:
the rest, usb subsystem · Maintainers:
Linus Torvalds, Greg Kroah-Hartman
The vhub engine has two dma mode, one is descriptor list, another is single stage DMA. Each mode has different stop register setting. Descriptor list operation (bit2) : 0 disable reset, 1: enable reset Single mode operation (bit0) : 0 : disable, 1: enable Signed-off-by: Ryan Chen <ryan_chen@aspeedtech.com> --- drivers/usb/gadget/udc/aspeed-vhub/epn.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/drivers/usb/gadget/udc/aspeed-vhub/epn.c b/drivers/usb/gadget/udc/aspeed-vhub/epn.c
index 0bd6b20435b8..02d8bfae58fb 100644
--- a/drivers/usb/gadget/udc/aspeed-vhub/epn.c
+++ b/drivers/usb/gadget/udc/aspeed-vhub/epn.c@@ -420,7 +420,10 @@ static void ast_vhub_stop_active_req(struct ast_vhub_ep *ep, u32 state, reg, loops; /* Stop DMA activity */ - writel(0, ep->epn.regs + AST_VHUB_EP_DMA_CTLSTAT); + if (ep->epn.desc_mode) + writel(VHUB_EP_DMA_CTRL_RESET, ep->epn.regs + AST_VHUB_EP_DMA_CTLSTAT); + else + writel(0, ep->epn.regs + AST_VHUB_EP_DMA_CTLSTAT); /* Wait for it to complete */ for (loops = 0; loops < 1000; loops++) {
--
2.17.1
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