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usb: musb: Add 'extvbus' in musb_hdrc_platform_data 

Some of the board might use external Vbus power supply on musb
interface which would require to program ULPI_BUSCONTROL register.

Adding 'extvbus' flag which can be set from such boards which will
be checked at musb driver files before programming ULPI_BUSCONTROL.

Signed-off-by: Ajay Kumar Gupta <ajay.gupta@ti.com>
Signed-off-by: Felipe Balbi <felipe.balbi@nokia.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Ajay Kumar Gupta 2009-12-28 13:40:42 +02:00 committed by Greg Kroah-Hartman
parent 51bf0d0e6c
commit 5fc4e77911
3 changed files with 16 additions and 0 deletions
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8
drivers/usb/musb/musb_core.c
View File

@ -2031,6 +2031,7 @@ bad_config:
/* host side needs more setup */
if (is_host_enabled(musb)) {
struct usb_hcd *hcd = musb_to_hcd(musb);
u8 busctl;
otg_set_host(musb->xceiv, &hcd->self);
@ -2038,6 +2039,13 @@ bad_config:
hcd->self.otg_port = 1;
musb->xceiv->host = &hcd->self;
hcd->power_budget = 2 * (plat->power ? : 250);
/* program PHY to use external vBus if required */
if (plat->extvbus) {
busctl = musb_readb(musb->mregs, MUSB_ULPI_BUSCONTROL);
busctl |= MUSB_ULPI_USE_EXTVBUS;
musb_writeb(musb->mregs, MUSB_ULPI_BUSCONTROL, busctl);
}
}
/* For the host-only role, we can activate right away.

5
drivers/usb/musb/musb_regs.h
View File

@ -72,6 +72,10 @@
#define MUSB_DEVCTL_HR 0x02
#define MUSB_DEVCTL_SESSION 0x01
/* MUSB ULPI VBUSCONTROL */
#define MUSB_ULPI_USE_EXTVBUS 0x01
#define MUSB_ULPI_USE_EXTVBUSIND 0x02
/* TESTMODE */
#define MUSB_TEST_FORCE_HOST 0x80
#define MUSB_TEST_FIFO_ACCESS 0x40
@ -246,6 +250,7 @@
/* REVISIT: vctrl/vstatus: optional vendor utmi+phy register at 0x68 */
#define MUSB_HWVERS 0x6C /* 8 bit */
#define MUSB_ULPI_BUSCONTROL 0x70 /* 8 bit */
#define MUSB_EPINFO 0x78 /* 8 bit */
#define MUSB_RAMINFO 0x79 /* 8 bit */

3
include/linux/usb/musb.h
View File

@ -76,6 +76,9 @@ struct musb_hdrc_platform_data {
/* (HOST or OTG) msec/2 after VBUS on till power good */
u8 potpgt;
/* (HOST or OTG) program PHY for external Vbus */
unsigned extvbus:1;
/* Power the device on or off */
int (*set_power)(int state);