3.16.7-ckt19 -stable review patch. If anyone has any objections, please let me know.
------------------ From: Nikhil Badola <[email protected]> commit f8786a91548df6930643a052e40e5c0b7a8403a5 upstream. 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: Ramneek Mehresh <[email protected]> Signed-off-by: Nikhil Badola <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]> Signed-off-by: Luis Henriques <[email protected]> --- drivers/usb/host/ehci-fsl.c | 4 ++++ drivers/usb/host/ehci-hub.c | 7 +++++++ drivers/usb/host/ehci.h | 12 ++++++++++++ drivers/usb/host/fsl-mph-dr-of.c | 4 ++++ include/linux/fsl_devices.h | 1 + 5 files changed, 28 insertions(+) diff --git a/drivers/usb/host/ehci-fsl.c b/drivers/usb/host/ehci-fsl.c index c412c4f35007..0b5b95e350dc 100644 --- a/drivers/usb/host/ehci-fsl.c +++ b/drivers/usb/host/ehci-fsl.c @@ -298,6 +298,10 @@ 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)) diff --git a/drivers/usb/host/ehci-hub.c b/drivers/usb/host/ehci-hub.c index 837a1edd33e2..f82bc5cded08 100644 --- a/drivers/usb/host/ehci-hub.c +++ b/drivers/usb/host/ehci-hub.c @@ -1218,6 +1218,13 @@ 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; diff --git a/drivers/usb/host/ehci.h b/drivers/usb/host/ehci.h index eee228a26a0e..1c57b4a148e4 100644 --- a/drivers/usb/host/ehci.h +++ b/drivers/usb/host/ehci.h @@ -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 diff --git a/drivers/usb/host/fsl-mph-dr-of.c b/drivers/usb/host/fsl-mph-dr-of.c index 4d03afb7cf4a..21dcdc8f95c2 100644 --- a/drivers/usb/host/fsl-mph-dr-of.c +++ b/drivers/usb/host/fsl-mph-dr-of.c @@ -211,6 +211,10 @@ 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; if (pdata->have_sysif_regs) { if (pdata->controller_ver < 0) { diff --git a/include/linux/fsl_devices.h b/include/linux/fsl_devices.h index 0f17316ce420..f7103ba6e509 100644 --- a/include/linux/fsl_devices.h +++ b/include/linux/fsl_devices.h @@ -93,6 +93,7 @@ struct fsl_usb2_platform_data { unsigned suspended:1; unsigned already_suspended:1; unsigned has_fsl_erratum_a007792:1; + unsigned has_fsl_erratum_a005275:1; /* register save area for suspend/resume */ u32 pm_command; -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
