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usb: musb: fix for v3.12-rc

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A single patch fixing musb start when using peripheral
 only configurations. It turns out that musb_start() needs
 to be called for peripheral too, so that function is
 factored out of musb_virthub.c and into musb_core.c since
 it's shared for both roles.
 
 Signed-of-by: Felipe Balbi <balbi@ti.com>
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Merge tag 'fixes-for-v3.12-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/balbi/usb into usb-linus

Pull USB gadget fixes from Felipe:

usb: musb: fix for v3.12-rc

A single patch fixing musb start when using peripheral
only configurations. It turns out that musb_start() needs
to be called for peripheral too, so that function is
factored out of musb_virthub.c and into musb_core.c since
it's shared for both roles.

Signed-of-by: Felipe Balbi <balbi@ti.com>
This commit is contained in:
Greg Kroah-Hartman 2013-10-11 16:10:56 -07:00
commit 22c7ef0a51
4 changed files with 49 additions and 46 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

46
drivers/usb/musb/musb_core.c
View File

@ -921,6 +921,52 @@ static void musb_generic_disable(struct musb *musb)
} }
/*
* Program the HDRC to start (enable interrupts, dma, etc.).
*/
void musb_start(struct musb *musb)
{
void __iomem *regs = musb->mregs;
u8 devctl = musb_readb(regs, MUSB_DEVCTL);
dev_dbg(musb->controller, "<== devctl %02x\n", devctl);
/* Set INT enable registers, enable interrupts */
musb->intrtxe = musb->epmask;
musb_writew(regs, MUSB_INTRTXE, musb->intrtxe);
musb->intrrxe = musb->epmask & 0xfffe;
musb_writew(regs, MUSB_INTRRXE, musb->intrrxe);
musb_writeb(regs, MUSB_INTRUSBE, 0xf7);
musb_writeb(regs, MUSB_TESTMODE, 0);
/* put into basic highspeed mode and start session */
musb_writeb(regs, MUSB_POWER, MUSB_POWER_ISOUPDATE
| MUSB_POWER_HSENAB
/* ENSUSPEND wedges tusb */
/* | MUSB_POWER_ENSUSPEND */
);
musb->is_active = 0;
devctl = musb_readb(regs, MUSB_DEVCTL);
devctl &= ~MUSB_DEVCTL_SESSION;
/* session started after:
* (a) ID-grounded irq, host mode;
* (b) vbus present/connect IRQ, peripheral mode;
* (c) peripheral initiates, using SRP
*/
if (musb->port_mode != MUSB_PORT_MODE_HOST &&
(devctl & MUSB_DEVCTL_VBUS) == MUSB_DEVCTL_VBUS) {
musb->is_active = 1;
} else {
devctl |= MUSB_DEVCTL_SESSION;
}
musb_platform_enable(musb);
musb_writeb(regs, MUSB_DEVCTL, devctl);
}
/* /*
* Make the HDRC stop (disable interrupts, etc.); * Make the HDRC stop (disable interrupts, etc.);
* reversible by musb_start * reversible by musb_start

1
drivers/usb/musb/musb_core.h
View File

@ -503,6 +503,7 @@ static inline void musb_configure_ep0(struct musb *musb)
extern const char musb_driver_name[]; extern const char musb_driver_name[];
extern void musb_stop(struct musb *musb); extern void musb_stop(struct musb *musb);
extern void musb_start(struct musb *musb);
extern void musb_write_fifo(struct musb_hw_ep *ep, u16 len, const u8 *src); extern void musb_write_fifo(struct musb_hw_ep *ep, u16 len, const u8 *src);
extern void musb_read_fifo(struct musb_hw_ep *ep, u16 len, u8 *dst); extern void musb_read_fifo(struct musb_hw_ep *ep, u16 len, u8 *dst);

2
drivers/usb/musb/musb_gadget.c
View File

@ -1858,6 +1858,8 @@ static int musb_gadget_start(struct usb_gadget *g,
musb->xceiv->state = OTG_STATE_B_IDLE; musb->xceiv->state = OTG_STATE_B_IDLE;
spin_unlock_irqrestore(&musb->lock, flags); spin_unlock_irqrestore(&musb->lock, flags);
musb_start(musb);
/* REVISIT: funcall to other code, which also /* REVISIT: funcall to other code, which also
* handles power budgeting ... this way also * handles power budgeting ... this way also
* ensures HdrcStart is indirectly called. * ensures HdrcStart is indirectly called.

46
drivers/usb/musb/musb_virthub.c
View File

@ -44,52 +44,6 @@
#include "musb_core.h" #include "musb_core.h"
/*
* Program the HDRC to start (enable interrupts, dma, etc.).
*/
static void musb_start(struct musb *musb)
{
void __iomem *regs = musb->mregs;
u8 devctl = musb_readb(regs, MUSB_DEVCTL);
dev_dbg(musb->controller, "<== devctl %02x\n", devctl);
/* Set INT enable registers, enable interrupts */
musb->intrtxe = musb->epmask;
musb_writew(regs, MUSB_INTRTXE, musb->intrtxe);
musb->intrrxe = musb->epmask & 0xfffe;
musb_writew(regs, MUSB_INTRRXE, musb->intrrxe);
musb_writeb(regs, MUSB_INTRUSBE, 0xf7);
musb_writeb(regs, MUSB_TESTMODE, 0);
/* put into basic highspeed mode and start session */
musb_writeb(regs, MUSB_POWER, MUSB_POWER_ISOUPDATE
| MUSB_POWER_HSENAB
/* ENSUSPEND wedges tusb */
/* | MUSB_POWER_ENSUSPEND */
);
musb->is_active = 0;
devctl = musb_readb(regs, MUSB_DEVCTL);
devctl &= ~MUSB_DEVCTL_SESSION;
/* session started after:
* (a) ID-grounded irq, host mode;
* (b) vbus present/connect IRQ, peripheral mode;
* (c) peripheral initiates, using SRP
*/
if (musb->port_mode != MUSB_PORT_MODE_HOST &&
(devctl & MUSB_DEVCTL_VBUS) == MUSB_DEVCTL_VBUS) {
musb->is_active = 1;
} else {
devctl |= MUSB_DEVCTL_SESSION;
}
musb_platform_enable(musb);
musb_writeb(regs, MUSB_DEVCTL, devctl);
}
static void musb_port_suspend(struct musb *musb, bool do_suspend) static void musb_port_suspend(struct musb *musb, bool do_suspend)
{ {
struct usb_otg *otg = musb->xceiv->otg; struct usb_otg *otg = musb->xceiv->otg;