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| author | Andiry Xu <andiry.xu@amd.com> | 2010-10-14 18:23:06 +0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2010-10-22 21:22:13 +0400 |
| commit | 5535b1d5f8885695c6ded783c692e3c0d0eda8ca (patch) | |
| tree | f5454493a1c50e4a6254d904578dc3ecfd1d6e63 /drivers/usb/host/xhci.h | |
| parent | 9777e3ce907d4cb5a513902a87ecd03b52499569 (diff) | |
| download | linux-5535b1d5f8885695c6ded783c692e3c0d0eda8ca.tar.xz | |
USB: xHCI: PCI power management implementation
This patch implements the PCI suspend/resume.
Please refer to xHCI spec for doing the suspend/resume operation.
For S3, CSS/SRS in USBCMD is used to save/restore the internal state.
However, an error maybe occurs while restoring the internal state.
In this case, it means that HC internal state is wrong and HC will be
re-initialized.
Signed-off-by: Libin Yang <libin.yang@amd.com>
Signed-off-by: Dong Nguyen <dong.nguyen@amd.com>
Signed-off-by: Andiry Xu <andiry.xu@amd.com>
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/usb/host/xhci.h')
| -rw-r--r-- | drivers/usb/host/xhci.h | 16 |
1 files changed, 15 insertions, 1 deletions
diff --git a/drivers/usb/host/xhci.h b/drivers/usb/host/xhci.h index 196e21fb36ff..c08928adc524 100644 --- a/drivers/usb/host/xhci.h +++ b/drivers/usb/host/xhci.h @@ -191,7 +191,7 @@ struct xhci_op_regs { /* bits 4:6 are reserved (and should be preserved on writes). */ /* light reset (port status stays unchanged) - reset completed when this is 0 */ #define CMD_LRESET (1 << 7) -/* FIXME: ignoring host controller save/restore state for now. */ +/* host controller save/restore state. */ #define CMD_CSS (1 << 8) #define CMD_CRS (1 << 9) /* Enable Wrap Event - '1' means xHC generates an event when MFINDEX wraps. */ @@ -1130,6 +1130,17 @@ struct urb_priv { #define XHCI_STOP_EP_CMD_TIMEOUT 5 /* XXX: Make these module parameters */ +struct s3_save { + u32 command; + u32 dev_nt; + u64 dcbaa_ptr; + u32 config_reg; + u32 irq_pending; + u32 irq_control; + u32 erst_size; + u64 erst_base; + u64 erst_dequeue; +}; /* There is one ehci_hci structure per controller */ struct xhci_hcd { @@ -1198,6 +1209,7 @@ struct xhci_hcd { unsigned long next_statechange; u32 command; + struct s3_save s3; /* Host controller is dying - not responding to commands. "I'm not dead yet!" * * xHC interrupts have been disabled and a watchdog timer will (or has already) @@ -1393,6 +1405,8 @@ int xhci_init(struct usb_hcd *hcd); int xhci_run(struct usb_hcd *hcd); void xhci_stop(struct usb_hcd *hcd); void xhci_shutdown(struct usb_hcd *hcd); +int xhci_suspend(struct xhci_hcd *xhci); +int xhci_resume(struct xhci_hcd *xhci, bool hibernated); int xhci_get_frame(struct usb_hcd *hcd); irqreturn_t xhci_irq(struct usb_hcd *hcd); irqreturn_t xhci_msi_irq(int irq, struct usb_hcd *hcd); |