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authorKrishna Kurapati <quic_kriskura@quicinc.com>2024-11-12 23:50:18 +0530
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2024-11-13 07:13:09 +0100
commitce25e2a8d82de7f8bcbedd18973e5b8030749d45 (patch)
treedbb3900c19b63d28b267ee5dbd35660793782774
parent61eb055cd3048ee01ca43d1be924167d33e16fdc (diff)
usb: dwc3: core: Set force_gen1 bit for all applicable SuperSpeed ports
Currently if the maximum-speed is set to Super Speed for a 3.1 Gen2 capable controller, the FORCE_GEN1 bit of LLUCTL register is set only for one SuperSpeed port (or the first port) present. Modify the logic to set the FORCE_GEN1 bit for all ports if speed is being limited to Gen-1. Suggested-by: Thinh Nguyen <Thinh.Nguyen@synopsys.com> Signed-off-by: Krishna Kurapati <quic_kriskura@quicinc.com> Acked-by: Thinh Nguyen <Thinh.Nguyen@synopsys.com> Link: https://lore.kernel.org/r/20241112182018.199392-1-quic_kriskura@quicinc.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-rw-r--r--drivers/usb/dwc3/core.c10
-rw-r--r--drivers/usb/dwc3/core.h2
2 files changed, 8 insertions, 4 deletions
diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c
index 9b888d33e64d..67aefdbe1d5f 100644
--- a/drivers/usb/dwc3/core.c
+++ b/drivers/usb/dwc3/core.c
@@ -1470,9 +1470,13 @@ static int dwc3_core_init(struct dwc3 *dwc)
if (hw_mode != DWC3_GHWPARAMS0_MODE_GADGET &&
(DWC3_IP_IS(DWC31)) &&
dwc->maximum_speed == USB_SPEED_SUPER) {
- reg = dwc3_readl(dwc->regs, DWC3_LLUCTL);
- reg |= DWC3_LLUCTL_FORCE_GEN1;
- dwc3_writel(dwc->regs, DWC3_LLUCTL, reg);
+ int i;
+
+ for (i = 0; i < dwc->num_usb3_ports; i++) {
+ reg = dwc3_readl(dwc->regs, DWC3_LLUCTL(i));
+ reg |= DWC3_LLUCTL_FORCE_GEN1;
+ dwc3_writel(dwc->regs, DWC3_LLUCTL(i), reg);
+ }
}
return 0;
diff --git a/drivers/usb/dwc3/core.h b/drivers/usb/dwc3/core.h
index 8306b39e5c64..2dccd8fa7efd 100644
--- a/drivers/usb/dwc3/core.h
+++ b/drivers/usb/dwc3/core.h
@@ -179,7 +179,7 @@
#define DWC3_OEVTEN 0xcc0C
#define DWC3_OSTS 0xcc10
-#define DWC3_LLUCTL 0xd024
+#define DWC3_LLUCTL(n) (0xd024 + ((n) * 0x80))
/* Bit fields */