On Tue, Feb 10, 2009 at 05:47:16AM +0100, Ajay Kumar Gupta wrote: > > -----Original Message----- > > From: Steve Sakoman [mailto:sakoman@xxxxxxxxx] > > Sent: Tuesday, February 10, 2009 10:13 AM > > To: Gupta, Ajay Kumar > > Cc: linux-omap > > Subject: Re: musb OTG broken in 2.6.29-rc3? > > > > On Mon, Feb 9, 2009 at 8:05 PM, Gupta, Ajay Kumar <ajay.gupta@xxxxxx> wrote: > > > > >> Before I spend too much time debugging, has anyone else been > > >> successful with musb OTG in 2.6.29-rc3? A quick search of this list > > >> didn't turn up any discussion of issues. > > > > > > It works fine on OMAP35x EVM too. I had to add a proc entry for session start > > > (Switching on the vBus). > > > > Could you give me a little more detail on what you had to do for > > session start? Perhaps I have a similar issue on Overo. > It is same $ echo "F" >/proc/driver/musb_hdrc, which was earlier > In musb_procfs.c and now been removed. > > + case 'F': > + reg = musb_readb(mbase, MUSB_DEVCTL); > + reg |= MUSB_DEVCTL_SESSION; > + musb_writeb(mbase, MUSB_DEVCTL, reg); a temp sysfs for that will help: Steve, could you try the following ==== cut here ==== diff --git a/drivers/usb/musb/musb_core.c b/drivers/usb/musb/musb_core.c index 2cc34fa..0ffd611 100644 --- a/drivers/usb/musb/musb_core.c +++ b/drivers/usb/musb/musb_core.c @@ -1713,6 +1713,32 @@ musb_vbus_show(struct device *dev, struct device_attribute *attr, char *buf) } static DEVICE_ATTR(vbus, 0644, musb_vbus_show, musb_vbus_store); +static ssize_t +musb_session_store(struct device *dev, struct device_attribute *attr, + const char *buf, size_t n) +{ + struct musb *musb = dev_to_musb(dev); + unsigned short session; + u8 devctl; + + if (sscanf(buf, "%hu", &session) != 1 + || (session != 1) || (session != 0)) { + dev_err(dev, "value must be 1 on 0\n"); + return -EINVAL; + } + + devctl = musb_readb(musb->mregs, MUSB_DEVCTL); + if (session) + devctl |= MUSB_DEVCTL_SESSION; + else + devctl &= ~MUSB_DEVCTL_SESSION; + + musb_writeb(musb->mregs, MUSB_DEVCTL, devctl); + + return n; +} +static DEVICE_ATTR(session, 0644, NULL, musb_session_store); + #ifdef CONFIG_USB_GADGET_MUSB_HDRC /* Gadget drivers can't know that a host is connected so they might want @@ -1813,6 +1839,7 @@ static void musb_free(struct musb *musb) */ #ifdef CONFIG_SYSFS + device_remove_file(musb->controller, &dev_attr_session); device_remove_file(musb->controller, &dev_attr_mode); device_remove_file(musb->controller, &dev_attr_vbus); #ifdef CONFIG_USB_MUSB_OTG @@ -2047,6 +2074,7 @@ bad_config: } #ifdef CONFIG_SYSFS + status = device_create_file(dev, &dev_attr_session); status = device_create_file(dev, &dev_attr_mode); status = device_create_file(dev, &dev_attr_vbus); #ifdef CONFIG_USB_GADGET_MUSB_HDRC @@ -2061,6 +2089,7 @@ bad_config: fail2: #ifdef CONFIG_SYSFS + device_remove_file(musb->controller, &dev_attr_session); device_remove_file(musb->controller, &dev_attr_mode); device_remove_file(musb->controller, &dev_attr_vbus); #ifdef CONFIG_USB_MUSB_OTG -- balbi -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
