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[ARM] ohci-pxa27x: introduce flags to avoid direct access to OHCI registers

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Direct access to USB host controller registers is considered to be not
portable, and is usually a bad sign for poorly abstracted interface.
Introduce .flags and .power_on_delay to "struct pxaohci_platform_data"
so that most platforms don't bother to write their own .init/.exit()
sequences.

Signed-off-by: Eric Miao <[email protected]>
Signed-off-by: Russell King <[email protected]>
This commit is contained in:
Eric Miao 2008-09-27 15:49:57 +08:00 • committed by Russell King
commit 097b53348f
12 changed files with 70 additions and 104 deletions
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37
drivers/usb/host/ohci-pxa27x.c
View file

@ -76,6 +76,41 @@ extern int usb_disabled(void);
/*-------------------------------------------------------------------------*/
static inline void pxa27x_setup_hc(struct pxaohci_platform_data *inf)
{
uint32_t uhchr = UHCHR;
uint32_t uhcrhda = UHCRHDA;
if (inf->flags & ENABLE_PORT1)
uhchr &= ~UHCHR_SSEP1;
if (inf->flags & ENABLE_PORT2)
uhchr &= ~UHCHR_SSEP2;
if (inf->flags & ENABLE_PORT3)
uhchr &= ~UHCHR_SSEP3;
if (inf->flags & POWER_CONTROL_LOW)
uhchr |= UHCHR_PCPL;
if (inf->flags & POWER_SENSE_LOW)
uhchr |= UHCHR_PSPL;
if (inf->flags & NO_OC_PROTECTION)
uhcrhda |= UHCRHDA_NOCP;
if (inf->flags & OC_MODE_PERPORT)
uhcrhda |= UHCRHDA_OCPM;
if (inf->power_on_delay) {
uhcrhda &= ~UHCRHDA_POTPGT(0xff);
uhcrhda |= UHCRHDA_POTPGT(inf->power_on_delay / 2);
}
UHCHR = uhchr;
UHCRHDA = uhcrhda;
}
static int pxa27x_start_hc(struct device *dev)
{
int retval = 0;
@ -93,6 +128,8 @@ static int pxa27x_start_hc(struct device *dev)
while (UHCHR & UHCHR_FSBIR)
cpu_relax();
pxa27x_setup_hc(inf);
if (inf->init)
retval = inf->init(dev);