diff options
| author | françois romieu <romieu@fr.zoreil.com> | 2012-04-17 11:11:40 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2012-04-17 22:54:13 -0400 |
| commit | 0c20494050a848af4479dbaa89e632a8c5903cf3 (patch) | |
| tree | bd869102a3f5f6b071d097e756b5e0293572f61c /drivers/net/ethernet/dec/tulip/dmfe.c | |
| parent | 584c5e2ad3ada1a5ccfffa68347b79c3681cc36e (diff) | |
dmfe: enforce consistent timing delay.
The driver does not always use the same timing for what looks like
the same operations.
- DCR0
Use the same udelay everywhere for reset. Upper bound is 100 us.
- DCR9
Use 5us delay for srom clock. 1us delay for phy_write_1bit (writes
PHY_DATA_[01]) are not changed as they stay withing a 2,5MHz MDIO
clock range.
Signed-off-by: Francois Romieu <romieu@fr.zoreil.com>
Reviewed-by: Grant Grundler <grundler@parisc-linux.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet/dec/tulip/dmfe.c')
| -rw-r--r-- | drivers/net/ethernet/dec/tulip/dmfe.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/drivers/net/ethernet/dec/tulip/dmfe.c b/drivers/net/ethernet/dec/tulip/dmfe.c index 0ef5b68acd05..4d6fe604fa64 100644 --- a/drivers/net/ethernet/dec/tulip/dmfe.c +++ b/drivers/net/ethernet/dec/tulip/dmfe.c @@ -767,7 +767,7 @@ static int dmfe_stop(struct DEVICE *dev) /* Reset & stop DM910X board */ dw32(DCR0, DM910X_RESET); - udelay(5); + udelay(100); phy_write(ioaddr, db->phy_addr, 0, 0x8000, db->chip_id); /* free interrupt */ @@ -1601,7 +1601,9 @@ static u16 read_srom_word(void __iomem *ioaddr, int offset) int i; dw32(DCR9, CR9_SROM_READ); + udelay(5); dw32(DCR9, CR9_SROM_READ | CR9_SRCS); + udelay(5); /* Send the Read Command 110b */ srom_clk_write(ioaddr, SROM_DATA_1); @@ -1615,6 +1617,7 @@ static u16 read_srom_word(void __iomem *ioaddr, int offset) } dw32(DCR9, CR9_SROM_READ | CR9_SRCS); + udelay(5); for (i = 16; i > 0; i--) { dw32(DCR9, CR9_SROM_READ | CR9_SRCS | CR9_SRCLK); @@ -1626,6 +1629,7 @@ static u16 read_srom_word(void __iomem *ioaddr, int offset) } dw32(DCR9, CR9_SROM_READ); + udelay(5); return srom_data; } |