Commit f8786a91 authored by Nikhil Badola's avatar Nikhil Badola Committed by Greg Kroah-Hartman
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drivers: usb: fsl: Workaround for USB erratum-A005275 



Incoming packets in high speed are randomly corrupted by h/w
resulting in multiple errors. This workaround makes FS as
default mode in all affected socs by disabling HS chirp
signalling.This errata does not affect FS and LS mode.

Forces all HS devices to connect in FS mode for all socs
affected by this erratum:
P3041 and P2041 rev 1.0 and 1.1
P5020 and P5010 rev 1.0 and 2.0
P5040, P1010 and T4240 rev 1.0

Signed-off-by: default avatarRamneek Mehresh <ramneek.mehresh@freescale.com>
Signed-off-by: default avatarNikhil Badola <nikhil.badola@freescale.com>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent d50f1480

drivers/usb/host/ehci-fsl.c

+4 −0
Original line number Diff line number Diff line
@@ -278,6 +278,10 @@ static int ehci_fsl_usb_setup(struct ehci_hcd *ehci) 
		out_be32(non_ehci + FSL_SOC_USB_SNOOP2, 0x80000000 | SNOOP_SIZE_2GB);

	}



	/* Deal with USB erratum A-005275 */

	if (pdata->has_fsl_erratum_a005275 == 1)

		ehci->has_fsl_hs_errata = 1;



	if ((pdata->operating_mode == FSL_USB2_DR_HOST) ||

			(pdata->operating_mode == FSL_USB2_DR_OTG))

		if (ehci_fsl_setup_phy(hcd, pdata->phy_mode, 0))

drivers/usb/host/ehci-hub.c

+7 −0
Original line number Diff line number Diff line
@@ -1221,6 +1221,13 @@ int ehci_hub_control( 
				 */

				ehci->reset_done [wIndex] = jiffies

						+ msecs_to_jiffies (50);



				/*

				 * Force full-speed connect for FSL high-speed

				 * erratum; disable HS Chirp by setting PFSC bit

				 */

				if (ehci_has_fsl_hs_errata(ehci))

					temp |= (1 << PORTSC_FSL_PFSC);

			}

			ehci_writel(ehci, temp, status_reg);

			break;

drivers/usb/host/ehci.h

+12 −0
Original line number Diff line number Diff line
@@ -215,6 +215,7 @@ struct ehci_hcd { /* one per controller */ 
	/* SILICON QUIRKS */

	unsigned		no_selective_suspend:1;

	unsigned		has_fsl_port_bug:1; /* FreeScale */

	unsigned		has_fsl_hs_errata:1;	/* Freescale HS quirk */

	unsigned		big_endian_mmio:1;

	unsigned		big_endian_desc:1;

	unsigned		big_endian_capbase:1;
@@ -686,6 +687,17 @@ ehci_port_speed(struct ehci_hcd *ehci, unsigned int portsc) 
#define	ehci_has_fsl_portno_bug(e)		(0)

#endif



#define PORTSC_FSL_PFSC	24	/* Port Force Full-Speed Connect */



#if defined(CONFIG_PPC_85xx)

/* Some Freescale processors have an erratum (USB A-005275) in which

 * incoming packets get corrupted in HS mode

 */

#define ehci_has_fsl_hs_errata(e)	((e)->has_fsl_hs_errata)

#else

#define ehci_has_fsl_hs_errata(e)	(0)

#endif



/*

 * While most USB host controllers implement their registers in

 * little-endian format, a minority (celleb companion chip) implement

drivers/usb/host/fsl-mph-dr-of.c

+4 −0
Original line number Diff line number Diff line
@@ -221,6 +221,10 @@ static int fsl_usb2_mph_dr_of_probe(struct platform_device *ofdev) 
		pdata->has_fsl_erratum_a007792 = 1;

	else

		pdata->has_fsl_erratum_a007792 = 0;

	if (of_get_property(np, "fsl,usb-erratum-a005275", NULL))

		pdata->has_fsl_erratum_a005275 = 1;

	else

		pdata->has_fsl_erratum_a005275 = 0;



	/*

	 * Determine whether phy_clk_valid needs to be checked

include/linux/fsl_devices.h

+1 −0
Original line number Diff line number Diff line
@@ -99,6 +99,7 @@ struct fsl_usb2_platform_data { 
	unsigned	suspended:1;

	unsigned	already_suspended:1;

	unsigned        has_fsl_erratum_a007792:1;

	unsigned        has_fsl_erratum_a005275:1;

	unsigned        check_phy_clk_valid:1;



	/* register save area for suspend/resume */

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