diff options
author | Alan Stern <stern@rowland.harvard.edu> | 2008-10-06 15:25:53 (GMT) |
---|---|---|
committer | Greg Kroah-Hartman <gregkh@suse.de> | 2008-10-17 21:41:03 (GMT) |
commit | eafe5b99f2135488b21cf17a262c54997c44f784 (patch) | |
tree | 648a1c93460c7ae9b12624989cb8aca21d789114 | |
parent | 2da41d5f6c036e7a6e496a7e601a685f8b87acb0 (diff) | |
download | linux-fsl-qoriq-eafe5b99f2135488b21cf17a262c54997c44f784.tar.xz |
USB: EHCI: fix remote-wakeup support for ARC/TDI core
This patch (as1147) fixes the remote-wakeup support for EHCI
controllers using the ARC/TDI "embedded-TT" core. These controllers
turn off the RESUME bit by themselves when a port resume is complete;
hence we need to keep separate track of which ports are suspended or
in the process of resuming.
The patch also makes a couple of small improvements in ehci_irq(),
replacing reads of the command register with the value already stored
in a local variable.
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Tested-by: Thomas Reitmayr <treitmayr@devbase.at>
CC: David Brownell <david-b@pacbell.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
-rw-r--r-- | drivers/usb/host/ehci-hcd.c | 14 | ||||
-rw-r--r-- | drivers/usb/host/ehci-hub.c | 27 | ||||
-rw-r--r-- | drivers/usb/host/ehci.h | 2 |
3 files changed, 29 insertions, 14 deletions
diff --git a/drivers/usb/host/ehci-hcd.c b/drivers/usb/host/ehci-hcd.c index 358df2a..d343afa 100644 --- a/drivers/usb/host/ehci-hcd.c +++ b/drivers/usb/host/ehci-hcd.c @@ -706,7 +706,7 @@ static irqreturn_t ehci_irq (struct usb_hcd *hcd) pcd_status = status; /* resume root hub? */ - if (!(ehci_readl(ehci, &ehci->regs->command) & CMD_RUN)) + if (!(cmd & CMD_RUN)) usb_hcd_resume_root_hub(hcd); while (i--) { @@ -715,8 +715,11 @@ static irqreturn_t ehci_irq (struct usb_hcd *hcd) if (pstatus & PORT_OWNER) continue; - if (!(pstatus & PORT_RESUME) - || ehci->reset_done [i] != 0) + if (!(test_bit(i, &ehci->suspended_ports) && + ((pstatus & PORT_RESUME) || + !(pstatus & PORT_SUSPEND)) && + (pstatus & PORT_PE) && + ehci->reset_done[i] == 0)) continue; /* start 20 msec resume signaling from this port, @@ -731,9 +734,8 @@ static irqreturn_t ehci_irq (struct usb_hcd *hcd) /* PCI errors [4.15.2.4] */ if (unlikely ((status & STS_FATAL) != 0)) { - dbg_cmd (ehci, "fatal", ehci_readl(ehci, - &ehci->regs->command)); - dbg_status (ehci, "fatal", status); + dbg_cmd(ehci, "fatal", cmd); + dbg_status(ehci, "fatal", status); if (status & STS_HALT) { ehci_err (ehci, "fatal error\n"); dead: diff --git a/drivers/usb/host/ehci-hub.c b/drivers/usb/host/ehci-hub.c index 740835b..218f966 100644 --- a/drivers/usb/host/ehci-hub.c +++ b/drivers/usb/host/ehci-hub.c @@ -236,10 +236,8 @@ static int ehci_bus_resume (struct usb_hcd *hcd) temp = ehci_readl(ehci, &ehci->regs->port_status [i]); temp &= ~(PORT_RWC_BITS | PORT_WAKE_BITS); if (test_bit(i, &ehci->bus_suspended) && - (temp & PORT_SUSPEND)) { - ehci->reset_done [i] = jiffies + msecs_to_jiffies (20); + (temp & PORT_SUSPEND)) temp |= PORT_RESUME; - } ehci_writel(ehci, temp, &ehci->regs->port_status [i]); } i = HCS_N_PORTS (ehci->hcs_params); @@ -482,10 +480,9 @@ ehci_hub_status_data (struct usb_hcd *hcd, char *buf) * controller by the user. */ - if ((temp & mask) != 0 - || ((temp & PORT_RESUME) != 0 - && time_after_eq(jiffies, - ehci->reset_done[i]))) { + if ((temp & mask) != 0 || test_bit(i, &ehci->port_c_suspend) + || (ehci->reset_done[i] && time_after_eq( + jiffies, ehci->reset_done[i]))) { if (i < 7) buf [0] |= 1 << (i + 1); else @@ -688,6 +685,7 @@ static int ehci_hub_control ( /* resume completed? */ else if (time_after_eq(jiffies, ehci->reset_done[wIndex])) { + clear_bit(wIndex, &ehci->suspended_ports); set_bit(wIndex, &ehci->port_c_suspend); ehci->reset_done[wIndex] = 0; @@ -734,6 +732,9 @@ static int ehci_hub_control ( ehci_readl(ehci, status_reg)); } + if (!(temp & (PORT_RESUME|PORT_RESET))) + ehci->reset_done[wIndex] = 0; + /* transfer dedicated ports to the companion hc */ if ((temp & PORT_CONNECT) && test_bit(wIndex, &ehci->companion_ports)) { @@ -757,8 +758,17 @@ static int ehci_hub_control ( } if (temp & PORT_PE) status |= 1 << USB_PORT_FEAT_ENABLE; - if (temp & (PORT_SUSPEND|PORT_RESUME)) + + /* maybe the port was unsuspended without our knowledge */ + if (temp & (PORT_SUSPEND|PORT_RESUME)) { status |= 1 << USB_PORT_FEAT_SUSPEND; + } else if (test_bit(wIndex, &ehci->suspended_ports)) { + clear_bit(wIndex, &ehci->suspended_ports); + ehci->reset_done[wIndex] = 0; + if (temp & PORT_PE) + set_bit(wIndex, &ehci->port_c_suspend); + } + if (temp & PORT_OC) status |= 1 << USB_PORT_FEAT_OVER_CURRENT; if (temp & PORT_RESET) @@ -803,6 +813,7 @@ static int ehci_hub_control ( || (temp & PORT_RESET) != 0) goto error; ehci_writel(ehci, temp | PORT_SUSPEND, status_reg); + set_bit(wIndex, &ehci->suspended_ports); break; case USB_PORT_FEAT_POWER: if (HCS_PPC (ehci->hcs_params)) diff --git a/drivers/usb/host/ehci.h b/drivers/usb/host/ehci.h index a6fd550..b11798d 100644 --- a/drivers/usb/host/ehci.h +++ b/drivers/usb/host/ehci.h @@ -99,6 +99,8 @@ struct ehci_hcd { /* one per controller */ owned by the companion during a bus suspend */ unsigned long port_c_suspend; /* which ports have the change-suspend feature turned on */ + unsigned long suspended_ports; /* which ports are + suspended */ /* per-HC memory pools (could be per-bus, but ...) */ struct dma_pool *qh_pool; /* qh per active urb */ |