On 29 March 2016 at 03:46, Florian Fainelli <f.faine...@gmail.com> wrote:
> CC: bcm-kernel-feedback-list, Jon
>
> Le 28/03/2016 14:59, Rafał Miłecki a écrit :
>> +static inline struct bcm_ns_usb3 *phy_to_usb3(struct usb_phy *phy)
>> +{
>> + return container_of(phy, struct bcm_ns_usb3, phy);
>> +}
>> +
>> +static bool bcm_ns_usb3_wait_reg(struct bcm_ns_usb3 *usb3, void __iomem
>> *addr,
>> + u32 mask, u32 value, int timeout)
>> +{
>> + unsigned long deadline = jiffies + timeout;
>
> We are mixing timeout in micro seconds with jiffies here, should that be
> msecs_to_jiffies(timeout) instead?
It should! Thanks.
>> + u32 val;
>> +
>> + do {
>> + val = readl(addr);
>> + if ((val & mask) == value)
>> + return true;
>> + cpu_relax();
>> + udelay(10);
>
> Delay + relax, why not a msleep() instead?
I dropped cpu_relax and added counting how many iterations were
needed. In the worst case it took 3 loop iterations to have hw idle.
It gives ~30 us as the max needed waiting time. msleep would add too
much delay.
>> +static void bcm_ns_usb3_phy_init_ns_bx(struct bcm_ns_usb3 *usb3)
>> +{
>> + struct bcma_drv_cc_b *ccb = &usb3->bus->drv_cc_b;
>> +
>> + /* Enable MDIO. Setting MDCDIV as 26 */
>> + iowrite32(0x0000009a, ccb->mii + BCMA_CCB_MII_MNG_CTL);
>> + udelay(2);
>> +
>> + /* USB3 PLL Block */
>> + bcm_ns_usb3_mii_mng_write32(usb3, 0x587e8000);
>
> We might want to make the first write check whether the MII bus was idle
> or not, just in case?
Sure, good idea.
--
Rafał
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