From 8cd42e97bf451bbbb2f54dc571366ae5a72faaea Mon Sep 17 00:00:00 2001 From: Kumar Gala Date: Fri, 20 Jan 2006 13:57:52 -0800 Subject: [PATCH] [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: Kumar Gala Signed-off-by: David Brownell Signed-off-by: Greg Kroah-Hartman --- drivers/usb/host/ehci-fsl.c | 10 ++++++++++ drivers/usb/host/ehci-q.c | 9 ++++++++- drivers/usb/host/ehci.h | 15 +++++++++++++++ 3 files changed, 33 insertions(+), 1 deletion(-) diff --git a/drivers/usb/host/ehci-fsl.c b/drivers/usb/host/ehci-fsl.c index c6012d6cd5..59f90f76ee 100644 --- a/drivers/usb/host/ehci-fsl.c +++ b/drivers/usb/host/ehci-fsl.c @@ -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) diff --git a/drivers/usb/host/ehci-q.c b/drivers/usb/host/ehci-q.c index 9b13bf2fa9..6e28e593c0 100644 --- a/drivers/usb/host/ehci-q.c +++ b/drivers/usb/host/ehci-q.c @@ -721,7 +721,14 @@ qh_make ( info1 |= maxp << 16; info2 |= (EHCI_TUNE_MULT_TT << 30); - info2 |= urb->dev->ttport << 23; + + /* 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 * root hub tt, leave it zeroed. diff --git a/drivers/usb/host/ehci.h b/drivers/usb/host/ehci.h index 86af41c41d..679c1cdcc9 100644 --- a/drivers/usb/host/ehci.h +++ b/drivers/usb/host/ehci.h @@ -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<has_fsl_port_bug) +#else +#define ehci_has_fsl_portno_bug(e) (0) +#endif + + /*-------------------------------------------------------------------------*/ #ifndef DEBUG -- 2.39.5