78 lines
2.3 KiB
Diff
78 lines
2.3 KiB
Diff
From 7e7acebe992543334be05546dd02a9e80ba32d6c Mon Sep 17 00:00:00 2001
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From: Alice Liu <alice.liu@intel.com>
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Date: Thu, 10 Nov 2016 20:11:59 +0800
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Subject: [PATCH 042/550] dwc3 setup highspeed to USB3.0 on bxtp platform
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We find USB3.0 dwc3 can't work at superspeed on bxtp platform. We
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setup dwc3 highspeed to enable USB3.0 on bxtp platform.
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Change-Id: I48df90c39b652f8e2a48598e9e31947e5d68ca17
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Tracked-On:
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Signed-off-by: xiao jin <jin.xiao@intel.com>
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Signed-off-by: Liu, Alice <alice.liu@intel.com>
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Signed-off-by: Greniger, Jacek <jacekx.greniger@intel.com>
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(cherry picked from commit 4fc6d0494f0d5f21223c5b3f802a116a757c5893)
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---
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drivers/usb/dwc3/gadget.c | 29 +++++++++++++++++++++++++++--
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1 file changed, 27 insertions(+), 2 deletions(-)
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diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c
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index 2b53194081ba..cefd586301c8 100644
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--- a/drivers/usb/dwc3/gadget.c
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+++ b/drivers/usb/dwc3/gadget.c
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@@ -18,6 +18,7 @@
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#include <linux/io.h>
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#include <linux/list.h>
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#include <linux/dma-mapping.h>
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+#include <asm/processor.h>
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#include <linux/usb/ch9.h>
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#include <linux/usb/gadget.h>
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@@ -1810,6 +1811,17 @@ static void dwc3_gadget_setup_nump(struct dwc3 *dwc)
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dwc3_writel(dwc->regs, DWC3_DCFG, reg);
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}
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+static inline bool platform_is_bxtp(void)
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+{
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+#ifdef CONFIG_X86_64
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+ if ((boot_cpu_data.x86_model == 0x5c)
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+ && (boot_cpu_data.x86_stepping >= 0x8)
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+ && (boot_cpu_data.x86_stepping <= 0xf))
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+ return true;
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+#endif
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+ return false;
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+}
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+
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static int __dwc3_gadget_start(struct dwc3 *dwc)
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{
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struct dwc3_ep *dep;
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@@ -2018,10 +2030,23 @@ static void dwc3_gadget_set_speed(struct usb_gadget *g,
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reg |= DWC3_DCFG_HIGHSPEED;
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break;
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case USB_SPEED_SUPER:
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- reg |= DWC3_DCFG_SUPERSPEED;
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+ /*
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+ * WORKAROUND: BXTP platform USB3.0 port SS fail,
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+ * We switch SS to HS to enable USB3.0.
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+ */
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+ if (platform_is_bxtp())
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+ reg |= DWC3_DCFG_HIGHSPEED;
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+ else
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+ reg |= DWC3_DCFG_SUPERSPEED;
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break;
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case USB_SPEED_SUPER_PLUS:
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- if (dwc3_is_usb31(dwc))
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+ /*
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+ * WORKAROUND: BXTP platform USB3.0 port SS fail,
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+ * We switch SS to HS to enable USB3.0.
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+ */
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+ if (platform_is_bxtp())
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+ reg |= DWC3_DCFG_HIGHSPEED;
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+ else if (dwc3_is_usb31(dwc))
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reg |= DWC3_DCFG_SUPERSPEED_PLUS;
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else
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reg |= DWC3_DCFG_SUPERSPEED;
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--
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2.19.1
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