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authorBryan Wu <bryan.wu@analog.com>2008-01-30 03:52:22 -0500
committerDavid S. Miller <davem@davemloft.net>2008-02-03 07:28:47 -0500
commit7cc8f38188133e0c278b9f207d63c2c2b4d98236 (patch)
tree175e61cd74d95f67394442bb21d4f35038aa1ac4 /drivers/net
parent6db9e4617e9bdf9d31fbea165b10cb95318adf8c (diff)
EMAC driver: define MDC_CLK=2.5MHz and caculate mdc_div according to SCLK.
Signed-off-by: Bryan Wu <bryan.wu@analog.com> Signed-off-by: Jeff Garzik <jeff@garzik.org> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net')
-rw-r--r--drivers/net/bfin_mac.c16
1 files changed, 12 insertions, 4 deletions
diff --git a/drivers/net/bfin_mac.c b/drivers/net/bfin_mac.c
index 4006a5dea654..ee398196ea80 100644
--- a/drivers/net/bfin_mac.c
+++ b/drivers/net/bfin_mac.c
@@ -412,20 +412,26 @@ static void bf537_adjust_link(struct net_device *dev)
412 spin_unlock_irqrestore(&lp->lock, flags); 412 spin_unlock_irqrestore(&lp->lock, flags);
413} 413}
414 414
415/* MDC = 2.5 MHz */
416#define MDC_CLK 2500000
417
415static int mii_probe(struct net_device *dev) 418static int mii_probe(struct net_device *dev)
416{ 419{
417 struct bf537mac_local *lp = netdev_priv(dev); 420 struct bf537mac_local *lp = netdev_priv(dev);
418 struct phy_device *phydev = NULL; 421 struct phy_device *phydev = NULL;
419 unsigned short sysctl; 422 unsigned short sysctl;
420 int i; 423 int i;
424 u32 sclk, mdc_div;
421 425
422 /* Enable PHY output early */ 426 /* Enable PHY output early */
423 if (!(bfin_read_VR_CTL() & PHYCLKOE)) 427 if (!(bfin_read_VR_CTL() & PHYCLKOE))
424 bfin_write_VR_CTL(bfin_read_VR_CTL() | PHYCLKOE); 428 bfin_write_VR_CTL(bfin_read_VR_CTL() | PHYCLKOE);
425 429
426 /* MDC = 2.5 MHz */ 430 sclk = get_sclk();
431 mdc_div = ((sclk / MDC_CLK) / 2) - 1;
432
427 sysctl = bfin_read_EMAC_SYSCTL(); 433 sysctl = bfin_read_EMAC_SYSCTL();
428 sysctl |= SET_MDCDIV(24); 434 sysctl |= SET_MDCDIV(mdc_div);
429 bfin_write_EMAC_SYSCTL(sysctl); 435 bfin_write_EMAC_SYSCTL(sysctl);
430 436
431 /* search for connect PHY device */ 437 /* search for connect PHY device */
@@ -477,8 +483,10 @@ static int mii_probe(struct net_device *dev)
477 lp->phydev = phydev; 483 lp->phydev = phydev;
478 484
479 printk(KERN_INFO "%s: attached PHY driver [%s] " 485 printk(KERN_INFO "%s: attached PHY driver [%s] "
480 "(mii_bus:phy_addr=%s, irq=%d)\n", 486 "(mii_bus:phy_addr=%s, irq=%d, mdc_clk=%dHz(mdc_div=%d)"
481 DRV_NAME, phydev->drv->name, phydev->dev.bus_id, phydev->irq); 487 "@sclk=%dMHz)\n",
488 DRV_NAME, phydev->drv->name, phydev->dev.bus_id, phydev->irq,
489 MDC_CLK, mdc_div, sclk/1000000);
482 490
483 return 0; 491 return 0;
484} 492}