usb: gadget: aspeed: fix stop dma register setting.
commit5.4-rM2-2.2.x-imx-squashed4e0dcf62ab
upstream. 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 Fixes:7ecca2a408
("usb/gadget: Add driver for Aspeed SoC virtual hub") Cc: stable <stable@vger.kernel.org> Acked-by: Felipe Balbi <balbi@kernel.org> Acked-by: Joel Stanley <joel@jms.id.au> Signed-off-by: Ryan Chen <ryan_chen@aspeedtech.com> Link: https://lore.kernel.org/r/20210108081238.10199-2-ryan_chen@aspeedtech.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
parent
f89a193fd9
commit
564f3c5326
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@ -420,7 +420,10 @@ static void ast_vhub_stop_active_req(struct ast_vhub_ep *ep,
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u32 state, reg, loops;
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/* Stop DMA activity */
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writel(0, ep->epn.regs + AST_VHUB_EP_DMA_CTLSTAT);
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if (ep->epn.desc_mode)
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writel(VHUB_EP_DMA_CTRL_RESET, ep->epn.regs + AST_VHUB_EP_DMA_CTLSTAT);
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else
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writel(0, ep->epn.regs + AST_VHUB_EP_DMA_CTLSTAT);
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/* Wait for it to complete */
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for (loops = 0; loops < 1000; loops++) {
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