Author: manu
Date: Thu Dec 3 11:15:49 2020
New Revision: 368299
URL: https://svnweb.freebsd.org/changeset/base/368299
Log:
if_dwc: Honor snps,pbl property
DTS node can have this property which configure the burst length
for both TX and RX if it's the same.
This unbreak if_dwc on Allwinner A20 and possibly other boards that
uses this prop.
Reported by: qroxana <qrox...@mail.ru>
Modified:
head/sys/dev/dwc/if_dwc.c
head/sys/dev/dwc/if_dwc.h
Modified: head/sys/dev/dwc/if_dwc.c
==============================================================================
--- head/sys/dev/dwc/if_dwc.c Thu Dec 3 10:41:06 2020 (r368298)
+++ head/sys/dev/dwc/if_dwc.c Thu Dec 3 11:15:49 2020 (r368299)
@@ -1496,7 +1496,7 @@ dwc_attach(device_t dev)
uint32_t reg;
char *phy_mode;
phandle_t node;
- uint32_t txpbl, rxpbl;
+ uint32_t txpbl, rxpbl, pbl;
bool nopblx8 = false;
bool fixed_burst = false;
@@ -1516,10 +1516,12 @@ dwc_attach(device_t dev)
OF_prop_free(phy_mode);
}
+ if (OF_getencprop(node, "snps,pbl", &pbl, sizeof(uint32_t)) <= 0)
+ pbl = BUS_MODE_DEFAULT_PBL;
if (OF_getencprop(node, "snps,txpbl", &txpbl, sizeof(uint32_t)) <= 0)
- txpbl = 8;
+ txpbl = pbl;
if (OF_getencprop(node, "snps,rxpbl", &rxpbl, sizeof(uint32_t)) <= 0)
- rxpbl = 8;
+ rxpbl = pbl;
if (OF_hasprop(node, "snps,no-pbl-x8") == 1)
nopblx8 = true;
if (OF_hasprop(node, "snps,fixed-burst") == 1)
@@ -1569,6 +1571,7 @@ dwc_attach(device_t dev)
reg |= (rxpbl << BUS_MODE_RPBL_SHIFT);
if (fixed_burst)
reg |= BUS_MODE_FIXEDBURST;
+
WRITE4(sc, BUS_MODE, reg);
/*
Modified: head/sys/dev/dwc/if_dwc.h
==============================================================================
--- head/sys/dev/dwc/if_dwc.h Thu Dec 3 10:41:06 2020 (r368298)
+++ head/sys/dev/dwc/if_dwc.h Thu Dec 3 11:15:49 2020 (r368299)
@@ -229,8 +229,8 @@
#define BUS_MODE_PRIORXTX_21 1
#define BUS_MODE_PRIORXTX_11 0
#define BUS_MODE_PBL_SHIFT 8 /* Single block transfer size */
-#define BUS_MODE_PBL_BEATS_8 8
#define BUS_MODE_SWR (1 << 0) /* Reset */
+#define BUS_MODE_DEFAULT_PBL 8
#define TRANSMIT_POLL_DEMAND 0x1004
#define RECEIVE_POLL_DEMAND 0x1008
#define RX_DESCR_LIST_ADDR 0x100C
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