linux-kernel - Re: Nokia N900: musb is in wrong state after boot

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Message-ID: <20160607125044.GI29844@pali>
Date:	Tue, 7 Jun 2016 14:50:44 +0200
From:	Pali Rohár <pali.rohar@...il.com>
To:	Tony Lindgren <tony@...mide.com>
Cc:	joerg Reisenweber <joerg@...nmoko.org>,
	Felipe Balbi <balbi@...com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-omap@...r.kernel.org,
	Ivaylo Dimitrov <ivo.g.dimitrov.75@...il.com>,
	Sebastian Reichel <sre@...nel.org>,
	Aaro Koskinen <aaro.koskinen@....fi>,
	Pavel Machek <pavel@....cz>, Nishanth Menon <nm@...com>
Subject: Re: Nokia N900: musb is in wrong state after boot

On Sunday 29 May 2016 12:38:24 Pali Rohár wrote:
> > From fd67b58e3538c0732750ecad915cde736da099dc Mon Sep 17 00:00:00 2001
> > From: =?UTF-8?q?Pali=20Roh=C3=A1r?= <pali.rohar@...il.com>
> > Date: Sat, 9 Jan 2016 16:57:59 +0100
> > Subject: [PATCH] musb: debugfs: Add support in testmode for forcing host mode
> >  together with speed
> > 
> > ---
> >  drivers/usb/musb/musb_debugfs.c |   44 +++++++++++++++++++++++++--------------
> >  1 file changed, 28 insertions(+), 16 deletions(-)
> > 
> > diff --git a/drivers/usb/musb/musb_debugfs.c b/drivers/usb/musb/musb_debugfs.c
> > index 9b22d94..62c13a2 100644
> > --- a/drivers/usb/musb/musb_debugfs.c
> > +++ b/drivers/usb/musb/musb_debugfs.c
> > @@ -147,28 +147,34 @@ static int musb_test_mode_show(struct seq_file *s, void *unused)
> >  
> >  	test = musb_readb(musb->mregs, MUSB_TESTMODE);
> >  
> > -	if (test & MUSB_TEST_FORCE_HOST)
> > +	if (test & (MUSB_TEST_FORCE_HOST | MUSB_TEST_FORCE_FS))
> > +		seq_printf(s, "force host full-speed\n");
> > +
> > +	else if (test & (MUSB_TEST_FORCE_HOST | MUSB_TEST_FORCE_HS))
> > +		seq_printf(s, "force host high-speed\n");
> > +
> > +	else if (test & MUSB_TEST_FORCE_HOST)
> >  		seq_printf(s, "force host\n");
> >  
> > -	if (test & MUSB_TEST_FIFO_ACCESS)
> > +	else if (test & MUSB_TEST_FIFO_ACCESS)
> >  		seq_printf(s, "fifo access\n");
> >  
> > -	if (test & MUSB_TEST_FORCE_FS)
> > +	else if (test & MUSB_TEST_FORCE_FS)
> >  		seq_printf(s, "force full-speed\n");
> >  
> > -	if (test & MUSB_TEST_FORCE_HS)
> > +	else if (test & MUSB_TEST_FORCE_HS)
> >  		seq_printf(s, "force high-speed\n");
> >  
> > -	if (test & MUSB_TEST_PACKET)
> > +	else if (test & MUSB_TEST_PACKET)
> >  		seq_printf(s, "test packet\n");
> >  
> > -	if (test & MUSB_TEST_K)
> > +	else if (test & MUSB_TEST_K)
> >  		seq_printf(s, "test K\n");
> >  
> > -	if (test & MUSB_TEST_J)
> > +	else if (test & MUSB_TEST_J)
> >  		seq_printf(s, "test J\n");
> >  
> > -	if (test & MUSB_TEST_SE0_NAK)
> > +	else if (test & MUSB_TEST_SE0_NAK)
> >  		seq_printf(s, "test SE0 NAK\n");
> >  
> >  	return 0;
> > @@ -206,30 +212,36 @@ static ssize_t musb_test_mode_write(struct file *file,
> >  	if (copy_from_user(buf, ubuf, min_t(size_t, sizeof(buf) - 1, count)))
> >  		return -EFAULT;
> >  
> > -	if (strstarts(buf, "force host"))
> > +	if (strstarts(buf, "force host full-speed"))
> > +		test = MUSB_TEST_FORCE_HOST | MUSB_TEST_FORCE_FS;
> > +
> > +	else if (strstarts(buf, "force host high-speed"))
> > +		test = MUSB_TEST_FORCE_HOST | MUSB_TEST_FORCE_HS;
> > +
> > +	else if (strstarts(buf, "force host"))
> >  		test = MUSB_TEST_FORCE_HOST;
> >  
> > -	if (strstarts(buf, "fifo access"))
> > +	else if (strstarts(buf, "fifo access"))
> >  		test = MUSB_TEST_FIFO_ACCESS;
> >  
> > -	if (strstarts(buf, "force full-speed"))
> > +	else if (strstarts(buf, "force full-speed"))
> >  		test = MUSB_TEST_FORCE_FS;
> >  
> > -	if (strstarts(buf, "force high-speed"))
> > +	else if (strstarts(buf, "force high-speed"))
> >  		test = MUSB_TEST_FORCE_HS;
> >  
> > -	if (strstarts(buf, "test packet")) {
> > +	else if (strstarts(buf, "test packet")) {
> >  		test = MUSB_TEST_PACKET;
> >  		musb_load_testpacket(musb);
> >  	}
> >  
> > -	if (strstarts(buf, "test K"))
> > +	else if (strstarts(buf, "test K"))
> >  		test = MUSB_TEST_K;
> >  
> > -	if (strstarts(buf, "test J"))
> > +	else if (strstarts(buf, "test J"))
> >  		test = MUSB_TEST_J;
> >  
> > -	if (strstarts(buf, "test SE0 NAK"))
> > +	else if (strstarts(buf, "test SE0 NAK"))
> >  		test = MUSB_TEST_SE0_NAK;
> >  
> >  	musb_writeb(musb->mregs, MUSB_TESTMODE, test);
> > -- 
> > 1.7.9.5
> > 
> 
> Tony, what do you think about that patch?
> 

Tony, PING

-- 
Pali Rohár
pali.rohar@...il.com