diff options
| author | Henry Nestler | 2011-02-22 11:29:42 +0000 |
|---|---|---|
| committer | David S. Miller | 2011-02-23 14:29:50 -0800 |
| commit | 108f518cc4f81eb8e3b46a0bd5cb902ef90a51a8 (patch) | |
| tree | e7b48499a74f577c006b4828ee3d140f93eab725 /drivers/net/dm9000.c | |
| parent | 8dde924217fdf5b69f6cbbdca099d077ba269ad0 (diff) | |
DM9000B: Fix PHY power for network down/up
DM9000 revision B needs 1 ms delay after PHY power-on.
PHY must be powered on by writing 0 into register DM9000_GPR before
all other settings will change (see Davicom spec and example code).
Remember, that register DM9000_GPR was not changed by reset sequence.
Without this fix the FIFO is out of sync and sends wrong data after
sequence of "ifconfig ethX down ; ifconfig ethX up".
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/dm9000.c')
| -rw-r--r-- | drivers/net/dm9000.c | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/drivers/net/dm9000.c b/drivers/net/dm9000.c index 2bbd49653aa2..461dd6f905f7 100644 --- a/drivers/net/dm9000.c +++ b/drivers/net/dm9000.c @@ -802,10 +802,7 @@ dm9000_init_dm9000(struct net_device *dev) /* Checksum mode */ dm9000_set_rx_csum_unlocked(dev, db->rx_csum); - /* GPIO0 on pre-activate PHY */ - iow(db, DM9000_GPR, 0); /* REG_1F bit0 activate phyxcer */ iow(db, DM9000_GPCR, GPCR_GEP_CNTL); /* Let GPIO0 output */ - iow(db, DM9000_GPR, 0); /* Enable PHY */ ncr = (db->flags & DM9000_PLATF_EXT_PHY) ? NCR_EXT_PHY : 0; @@ -1194,6 +1191,10 @@ dm9000_open(struct net_device *dev) if (request_irq(dev->irq, dm9000_interrupt, irqflags, dev->name, dev)) return -EAGAIN; + /* GPIO0 on pre-activate PHY, Reg 1F is not set by reset */ + iow(db, DM9000_GPR, 0); /* REG_1F bit0 activate phyxcer */ + mdelay(1); /* delay needs by DM9000B */ + /* Initialize DM9000 board */ dm9000_reset(db); dm9000_init_dm9000(dev); |