gitops/mt76
1
0
Fork 0
mirror of https://github.com/outbackdingo/mt76.git synced 2026-10-24 13:26:48 +00:00
Code Issues Packages Projects Releases Wiki Activity

wifi: mt76: mt792x: drain USB UDMA before WFSYS reset

Browse Source 
Stop USB UDMA RX/TX and wait for idle before WFSYS reset.
Warn if the engine remains busy.

Signed-off-by: Sean Wang <[email protected]>
Link: https://patch.msgid.link/[email protected]
This commit is contained in:
Sean Wang
2026-07-21 10:36:58 +02:00
committed by Felix Fietkau
parent 91828c69db
commit e1a1abf100
1 changed files with 20 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files
mt792x_usb.c
+20
View File
@@ -11,6 +11,8 @@
#include "mt792x.h" #include "mt792x.h"
#include "mt76_connac2_mac.h" #include "mt76_connac2_mac.h"
#define MT792X_USB_UDMA_IDLE_TIMEOUT 1000
static int mt792xu_read32(struct mt76_dev *dev, u32 addr, void *buf) static int mt792xu_read32(struct mt76_dev *dev, u32 addr, void *buf)
{ {
return __mt76u_vendor_request(dev, MT_VEND_READ_EXT, return __mt76u_vendor_request(dev, MT_VEND_READ_EXT,
@@ -339,6 +341,23 @@ static void mt792xu_epctl_rst_opt(struct mt792x_dev *dev, bool reset)
mt792xu_uhw_wr(&dev->mt76, MT_SSUSB_EPCTL_CSR_EP_RST_OPT, val); mt792xu_uhw_wr(&dev->mt76, MT_SSUSB_EPCTL_CSR_EP_RST_OPT, val);
} }
static void mt792xu_wait_udma_idle(struct mt792x_dev *dev)
{
u32 mask = MT_WL_RX_BUSY | MT_WL_TX_BUSY;
u32 val;
mt76_set(dev, MT_UDMA_WLCFG_0, MT_WL_RX_FLUSH);
if (mt76_poll_msec(dev, MT_UDMA_WLCFG_0, mask, 0,
MT792X_USB_UDMA_IDLE_TIMEOUT))
return;
val = mt76_rr(dev, MT_UDMA_WLCFG_0);
dev_warn(dev->mt76.dev,
"UDMA busy before WFSYS reset: WLCFG0=0x%08x\n", val);
}
struct mt792xu_wfsys_desc { struct mt792xu_wfsys_desc {
u32 rst_reg; u32 rst_reg;
u32 done_reg; u32 done_reg;
@@ -405,6 +424,7 @@ int mt792xu_wfsys_reset(struct mt792x_dev *dev)
if (atomic_read(&dev->mt76.bus_hung)) if (atomic_read(&dev->mt76.bus_hung))
return -EIO; return -EIO;
mt792xu_wait_udma_idle(dev);
mt792xu_epctl_rst_opt(dev, false); mt792xu_epctl_rst_opt(dev, false);
val = mt792xu_uhw_rr(&dev->mt76, desc->rst_reg); val = mt792xu_uhw_rr(&dev->mt76, desc->rst_reg);