[PATCH v2 2/5] usb: dwc3: Support quirk for writing high-low order

Daehwan Jung
2024-05-31T06:07:32Z

Set xhci "write-64-hi-lo-quirk" property via
"snps,xhci-write-64-hi-lo-quirk" property.

Signed-off-by: Daehwan Jung <dh10.jung@samsung.com>
---
drivers/usb/dwc3/core.c | 3 +++
drivers/usb/dwc3/core.h | 2 ++
drivers/usb/dwc3/host.c | 5 ++++-
3 files changed, 9 insertions(+), 1 deletion(-)

diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c
index 7ee61a8..89985fd 100644
--- a/drivers/usb/dwc3/core.c
+++ b/drivers/usb/dwc3/core.c
@@ -1716,6 +1716,9 @@ static void dwc3_get_properties(struct dwc3 *dwc)
dwc->dis_split_quirk = device_property_read_bool(dev,
"snps,dis-split-quirk");

+ dwc->xhci_write_64_hi_lo_quirk = device_property_read_bool(dev,
+ "snps,xhci-write-64-hi-lo-quirk");
+
dwc->lpm_nyet_threshold = lpm_nyet_threshold;
dwc->tx_de_emphasis = tx_de_emphasis;

diff --git a/drivers/usb/dwc3/core.h b/drivers/usb/dwc3/core.h
index 3781c73..ab5913c 100644
--- a/drivers/usb/dwc3/core.h
+++ b/drivers/usb/dwc3/core.h
@@ -1142,6 +1142,7 @@ struct dwc3_scratchpad_array {
* 3 - Reserved
* @dis_metastability_quirk: set to disable metastability quirk.
* @dis_split_quirk: set to disable split boundary.
+ * @xhci_write_64_hi_lo_quirk: set if we enable quirk for writing in high-low order.
* @sys_wakeup: set if the device may do system wakeup.
* @wakeup_configured: set if the device is configured for remote wakeup.
* @suspended: set to track suspend event due to U3/L2.
@@ -1369,6 +1370,7 @@ struct dwc3 {
unsigned dis_metastability_quirk:1;

unsigned dis_split_quirk:1;
+ unsigned xhci_write_64_hi_lo_quirk:1;
unsigned async_callbacks:1;
unsigned sys_wakeup:1;
unsigned wakeup_configured:1;
diff --git a/drivers/usb/dwc3/host.c b/drivers/usb/dwc3/host.c
index a171b27..8cc0def 100644
--- a/drivers/usb/dwc3/host.c
+++ b/drivers/usb/dwc3/host.c
@@ -126,7 +126,7 @@ static int dwc3_host_get_irq(struct dwc3 *dwc)

int dwc3_host_init(struct dwc3 *dwc)
{
- struct property_entry props[5];
+ struct property_entry props[6];
struct platform_device *xhci;
int ret, irq;
int prop_idx = 0;
@@ -162,6 +162,9 @@ int dwc3_host_init(struct dwc3 *dwc)

props[prop_idx++] = PROPERTY_ENTRY_BOOL("xhci-sg-trb-cache-size-quirk");

+ if (dwc->xhci_write_64_hi_lo_quirk)
+ props[prop_idx++] = PROPERTY_ENTRY_BOOL("write-64-hi-lo-quirk");
+
if (dwc->usb3_lpm_capable)
props[prop_idx++] = PROPERTY_ENTRY_BOOL("usb3-lpm-capable");

--
2.7.4