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if_dwc: Honor snps,pbl property

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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 <qroxana@mail.ru>
This commit is contained in:
Emmanuel Vadot 2020-12-03 11:15:49 +00:00
parent 8eba75ed68
commit 3e5cd548af
2 changed files with 7 additions and 4 deletions
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9
sys/dev/dwc/if_dwc.c
View File

@ -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);
/*

2
sys/dev/dwc/if_dwc.h
View File

@ -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