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author | Sarah Sharp <sarah.a.sharp@linux.intel.com> | 2009-04-27 19:57:38 -0700 |
---|---|---|
committer | Greg Kroah-Hartman <gregkh@suse.de> | 2009-06-15 21:44:49 -0700 |
commit | 3ffbba9511b4148cbe1f6b6238686adaeaca8feb (patch) | |
tree | f69e42d07d596039e049fe2b14b720ddc6be2694 /drivers/usb/host/xhci-ring.c | |
parent | c6515272b858742962c1de0f3bf497a048b9abd7 (diff) | |
download | kernel_samsung_smdk4412-3ffbba9511b4148cbe1f6b6238686adaeaca8feb.zip kernel_samsung_smdk4412-3ffbba9511b4148cbe1f6b6238686adaeaca8feb.tar.gz kernel_samsung_smdk4412-3ffbba9511b4148cbe1f6b6238686adaeaca8feb.tar.bz2 |
USB: xhci: Allocate and address USB devices
xHCI needs to get a "Slot ID" from the host controller and allocate other
data structures for every USB device. Make usb_alloc_dev() and
usb_release_dev() allocate and free these device structures. After
setting up the xHC device structures, usb_alloc_dev() must wait for the
hardware to respond to an Enable Slot command. usb_alloc_dev() fires off
a Disable Slot command and does not wait for it to complete.
When the USB core wants to choose an address for the device, the xHCI
driver must issue a Set Address command and wait for an event for that
command.
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-ring.c')
-rw-r--r-- | drivers/usb/host/xhci-ring.c | 34 |
1 files changed, 30 insertions, 4 deletions
diff --git a/drivers/usb/host/xhci-ring.c b/drivers/usb/host/xhci-ring.c index 9d6bb3d..901ce70 100644 --- a/drivers/usb/host/xhci-ring.c +++ b/drivers/usb/host/xhci-ring.c @@ -252,13 +252,10 @@ void ring_cmd_db(struct xhci_hcd *xhci) static void handle_cmd_completion(struct xhci_hcd *xhci, struct xhci_event_cmd *event) { + int slot_id = TRB_TO_SLOT_ID(event->flags); u64 cmd_dma; dma_addr_t cmd_dequeue_dma; - /* Check completion code */ - if (GET_COMP_CODE(event->status) != COMP_SUCCESS) - xhci_dbg(xhci, "WARN: unsuccessful no-op command\n"); - cmd_dma = (((u64) event->cmd_trb[1]) << 32) + event->cmd_trb[0]; cmd_dequeue_dma = trb_virt_to_dma(xhci->cmd_ring->deq_seg, xhci->cmd_ring->dequeue); @@ -273,6 +270,21 @@ static void handle_cmd_completion(struct xhci_hcd *xhci, return; } switch (xhci->cmd_ring->dequeue->generic.field[3] & TRB_TYPE_BITMASK) { + case TRB_TYPE(TRB_ENABLE_SLOT): + if (GET_COMP_CODE(event->status) == COMP_SUCCESS) + xhci->slot_id = slot_id; + else + xhci->slot_id = 0; + complete(&xhci->addr_dev); + break; + case TRB_TYPE(TRB_DISABLE_SLOT): + if (xhci->devs[slot_id]) + xhci_free_virt_device(xhci, slot_id); + break; + case TRB_TYPE(TRB_ADDR_DEV): + xhci->devs[slot_id]->cmd_status = GET_COMP_CODE(event->status); + complete(&xhci->addr_dev); + break; case TRB_TYPE(TRB_CMD_NOOP): ++xhci->noops_handled; break; @@ -400,3 +412,17 @@ void *setup_one_noop(struct xhci_hcd *xhci) xhci->noops_submitted++; return ring_cmd_db; } + +/* Queue a slot enable or disable request on the command ring */ +int queue_slot_control(struct xhci_hcd *xhci, u32 trb_type, u32 slot_id) +{ + return queue_command(xhci, 0, 0, 0, + TRB_TYPE(trb_type) | SLOT_ID_FOR_TRB(slot_id)); +} + +/* Queue an address device command TRB */ +int queue_address_device(struct xhci_hcd *xhci, dma_addr_t in_ctx_ptr, u32 slot_id) +{ + return queue_command(xhci, in_ctx_ptr, 0, 0, + TRB_TYPE(TRB_ADDR_DEV) | SLOT_ID_FOR_TRB(slot_id)); +} |