diff options
| author | Nikhil Badola <nikhil.badola@freescale.com> | 2015-08-06 12:21:27 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2015-08-15 02:50:36 +0300 |
| commit | f8786a91548df6930643a052e40e5c0b7a8403a5 (patch) | |
| tree | 96dd69b15435733dd606d4d448111b8fc848283b /drivers/usb/host/ehci.h | |
| parent | d50f14805ec0f1cf50654e23559d1dcf81c68b26 (diff) | |
| download | linux-f8786a91548df6930643a052e40e5c0b7a8403a5.tar.xz | |
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: Ramneek Mehresh <ramneek.mehresh@freescale.com>
Signed-off-by: Nikhil Badola <nikhil.badola@freescale.com>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb/host/ehci.h')
| -rw-r--r-- | drivers/usb/host/ehci.h | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/drivers/usb/host/ehci.h b/drivers/usb/host/ehci.h index f700157cd084..46f62e41bcde 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 |