On 11/21/2012 03:52 PM, Felipe Balbi wrote:
> On Thu, Nov 15, 2012 at 04:34:08PM +0200, Roger Quadros wrote:
>> OMAPs till date can have upto 3 ports. We need to initialize
>
> s/upto/up to/
>
>> the port mode in HOSTCONFIG register for all of them.
>
> why *all* of them ? Isn't it enough to initialize only the ones we're
> going to use ? If not, why ?
>
>> Signed-off-by: Roger Quadros <rogerq@xxxxxx>
>> ---
>> drivers/mfd/omap-usb-host.c | 31 ++++++++++++-------------------
>> 1 files changed, 12 insertions(+), 19 deletions(-)
>>
>> diff --git a/drivers/mfd/omap-usb-host.c b/drivers/mfd/omap-usb-host.c
>> index c20234b..0d39bd7 100644
>> --- a/drivers/mfd/omap-usb-host.c
>> +++ b/drivers/mfd/omap-usb-host.c
>> @@ -67,12 +67,9 @@
>> #define OMAP4_UHH_SYSCONFIG_NOSTDBY (1 << 4)
>> #define OMAP4_UHH_SYSCONFIG_SOFTRESET (1 << 0)
>>
>> -#define OMAP4_P1_MODE_CLEAR (3 << 16)
>> +#define OMAP4_P1_MODE_MASK (3 << 16)
>
> changing this name isn't part of $SUBJECT.
>
>> #define OMAP4_P1_MODE_TLL (1 << 16)
>> #define OMAP4_P1_MODE_HSIC (3 << 16)
>> -#define OMAP4_P2_MODE_CLEAR (3 << 18)
>> -#define OMAP4_P2_MODE_TLL (1 << 18)
>> -#define OMAP4_P2_MODE_HSIC (3 << 18)
>
> why do you delete these ? Also not part of $SUBJECT.
>
>>
>> #define OMAP_UHH_DEBUG_CSR (0x44)
>>
>> @@ -343,6 +340,7 @@ static void omap_usbhs_init(struct device *dev)
>> struct usbhs_omap_platform_data *pdata = omap->pdata;
>> unsigned long flags;
>> unsigned reg;
>> + int i;
>>
>> dev_dbg(dev, "starting TI HSUSB Controller\n");
>>
>> @@ -403,21 +401,16 @@ static void omap_usbhs_init(struct device *dev)
>> reg |= OMAP_UHH_HOSTCONFIG_ULPI_P3_BYPASS;
>> }
>> } else if (is_omap_usbhs_rev2(omap)) {
>> - /* Clear port mode fields for PHY mode*/
>> - reg &= ~OMAP4_P1_MODE_CLEAR;
>> - reg &= ~OMAP4_P2_MODE_CLEAR;
>> -
>> - if (is_ehci_tll_mode(pdata->port_mode[0]) ||
>> - (is_ohci_port(pdata->port_mode[0])))
>> - reg |= OMAP4_P1_MODE_TLL;
>> - else if (is_ehci_hsic_mode(pdata->port_mode[0]))
>> - reg |= OMAP4_P1_MODE_HSIC;
>> -
>> - if (is_ehci_tll_mode(pdata->port_mode[1]) ||
>> - (is_ohci_port(pdata->port_mode[1])))
>> - reg |= OMAP4_P2_MODE_TLL;
>> - else if (is_ehci_hsic_mode(pdata->port_mode[1]))
>> - reg |= OMAP4_P2_MODE_HSIC;
>> + for (i = 0; i < omap->nports; i++) {
>> + /* Clear port mode fields for PHY mode*/
>> + reg &= ~(OMAP4_P1_MODE_MASK << 2*i);
>
> add spaces around '*' operator.
>
>> + if (is_ehci_tll_mode(pdata->port_mode[i]) ||
>> + (is_ohci_port(pdata->port_mode[i])))
>> + reg |= OMAP4_P1_MODE_TLL << 2*i;
>
> ditto
>
>> + else if (is_ehci_hsic_mode(pdata->port_mode[i]))
>> + reg |= OMAP4_P1_MODE_HSIC << 2*i;
>
> ditto
>
> in fact, I would convert this construct into a switch which would look
> like:
>
> reg &= ~(OMAP4_P1_MODE_MASK << i * 2);
>
> switch (port_mode[i]) {
> case OMAP4_P1_MODE_TLL:
> reg |= OMAP4_P1_MODE_TLL << i * 2;
> break;
> case OMAP_P1_MODE_HSIC:
> reg |= OMAP4_P1_MODE_HSIC << i * 2;
> break;
> }
>
Just realized that is_ohci_port() takes care of 10 cases, so I'll leave
it the way it was with if statement.
> Also, it looks like the whoel for loop with port mode settings could be
> re-factored to a separate function to aid readability.
>
it seems that the purpose of omap_usbhs_init() is to initialize
HOSTCONFIG so I see no point in adding another function for it. I can
clean it up for better readability though.
--
cheers,
-roger
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