Commit 8cd42e97 authored by Kumar Gala's avatar Kumar Gala Committed by Greg Kroah-Hartman
Browse files

[PATCH] USB: EHCI and Freescale 83xx quirk 



On the MPC834x processors the multiport host (MPH) EHCI controller has an
erratum in which the port number in the queue head expects to be 0..N-1
instead of 1..N.  If we are on one of these chips we subtract one from
the port number before putting it into the queue head.

Signed-off-by: default avatarKumar Gala <galak@kernel.crashing.org>
Signed-off-by: default avatarDavid Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
parent 80cb9aee

drivers/usb/host/ehci-fsl.c

+10 −0
Original line number Diff line number Diff line
@@ -198,6 +198,16 @@ static void mpc83xx_usb_setup(struct usb_hcd *hcd) 
		mpc83xx_setup_phy(ehci, pdata->phy_mode, 0);



	if (pdata->operating_mode == FSL_USB2_MPH_HOST) {

		unsigned int chip, rev, svr;



		svr = mfspr(SPRN_SVR);

		chip = svr >> 16;

		rev = (svr >> 4) & 0xf;



		/* Deal with USB Erratum #14 on MPC834x Rev 1.0 & 1.1 chips */

		if ((rev == 1) && (chip >= 0x8050) && (chip <= 0x8055))

			ehci->has_fsl_port_bug = 1;



		if (pdata->port_enables & FSL_USB2_PORT0_ENABLED)

			mpc83xx_setup_phy(ehci, pdata->phy_mode, 0);

		if (pdata->port_enables & FSL_USB2_PORT1_ENABLED)

drivers/usb/host/ehci-q.c

+8 −1
Original line number Diff line number Diff line
@@ -721,6 +721,13 @@ qh_make ( 
		info1 |= maxp << 16;



		info2 |= (EHCI_TUNE_MULT_TT << 30);



		/* Some Freescale processors have an erratum in which the

		 * port number in the queue head was 0..N-1 instead of 1..N.

		 */

		if (ehci_has_fsl_portno_bug(ehci))

			info2 |= (urb->dev->ttport-1) << 23;

		else

			info2 |= urb->dev->ttport << 23;



		/* set the address of the TT; for TDI's integrated

drivers/usb/host/ehci.h

+15 −0
Original line number Diff line number Diff line
@@ -88,8 +88,11 @@ struct ehci_hcd { /* one per controller */ 
	unsigned long		next_statechange;

	u32			command;



	/* SILICON QUIRKS */

	unsigned		is_tdi_rh_tt:1;	/* TDI roothub with TT */

	unsigned		no_selective_suspend:1;

	unsigned		has_fsl_port_bug:1; /* FreeScale */



	u8			sbrn;		/* packed release number */



	/* irq statistics */
@@ -637,6 +640,18 @@ ehci_port_speed(struct ehci_hcd *ehci, unsigned int portsc) 
#define	ehci_port_speed(ehci, portsc)	(1<<USB_PORT_FEAT_HIGHSPEED)

#endif



/*-------------------------------------------------------------------------*/



#ifdef CONFIG_PPC_83xx

/* Some Freescale processors have an erratum in which the TT

 * port number in the queue head was 0..N-1 instead of 1..N.

 */

#define	ehci_has_fsl_portno_bug(e)		((e)->has_fsl_port_bug)

#else

#define	ehci_has_fsl_portno_bug(e)		(0)

#endif





/*-------------------------------------------------------------------------*/



#ifndef DEBUG

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