Thread (19 messages) 19 messages, 5 authors, 2006-08-04

Re: [PATCH] SMSC LAN911x and LAN921x vendor driver

From: <hidden>
Date: 2006-08-02 19:39:57

Possibly related (same subject, not in this thread)

Hi Francois,

Thanks again for all your feedback.  I have implemented most of your 
suggestions, 
quoted
                             /* Enable phy clocks to the MAC */
                             hwcfg &= (~HW_CFG_PHY_CLK_SEL_);
                             hwcfg |= HW_CFG_PHY_CLK_SEL_EXT_PHY_;
                             smsc911x_reg_write(hwcfg, pdata, HW_CFG);
                             udelay(10);             /* Enough time 
for clocks to restart */
(back to my original question that I should have reworded in a different
thread)

Does the platform guarantees that the register write has actually 
reached
the real register when the udelay is issued ?
I think so, but maybe you can help me check.  The LAN911x device is always 
directly connected to a simple SRAM-like host bus, and smsc911x_reg_write 
is implemented using readl.  Does this implicitly guarantee it to be 
volatile?

quoted
             if (!pdata->software_irq_signal) {
                             printk(KERN_WARNING "%s: ISR failed 
signaling test (IRQ %d)\n",
quoted
                                    dev->name, dev->irq);
                             return -ENODEV;
             }
             SMSC_TRACE("IRQ handler passed test using IRQ %d", 
dev->irq);
quoted
             printk(KERN_INFO "%s: SMSC911x/921x identified at %#08lx, 
IRQ: %d\n",
quoted
                    dev->name, (unsigned long)pdata->ioaddr, 
dev->irq);
quoted
             spin_lock_irqsave(&pdata->phy_lock, flags);
flags useless: ->open() is issued in irq-enabled context.
How do you mean? I thought an irq-enabled context meant i DO have to 
disable irqs?

quoted
             unsigned long flags;

             SMSC_TRACE("ioctl cmd 0x%x", cmd);
             switch (cmd) {
             case SIOCGMIIPHY:
             case SIOCDEVPRIVATE:
The SIOCDEVPRIVATE can/should be removed.
I have removed these, they were only in as a quick fix because mii-tool 
here sends SIOCDEVPRIVATE instead of SIOCGMIIPHY.  I fixed my copy of 
mii-tool instead :o)

Best Regards,
--
Steve Glendinning
SMSC GmbH
m: +44 777 933 9124
e: steve.glendinning@smsc.com
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