xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Merge branch 'usb-next' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb-2.6

Browse Source 
* 'usb-next' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb-2.6: (172 commits)
  USB: Add support for SuperSpeed isoc endpoints
  xhci: Clean up cycle bit math used during stalls.
  xhci: Fix cycle bit calculation during stall handling.
  xhci: Update internal dequeue pointers after stalls.
  USB: Disable auto-suspend for USB 3.0 hubs.
  USB: Remove bogus USB_PORT_STAT_SUPER_SPEED symbol.
  xhci: Return canceled URBs immediately when host is halted.
  xhci: Fixes for suspend/resume of shared HCDs.
  xhci: Fix re-init on power loss after resume.
  xhci: Make roothub functions deal with device removal.
  xhci: Limit roothub ports to 15 USB3 & 31 USB2 ports.
  xhci: Return a USB 3.0 hub descriptor for USB3 roothub.
  xhci: Register second xHCI roothub.
  xhci: Change xhci_find_slot_id_by_port() API.
  xhci: Refactor bus suspend state into a struct.
  xhci: Index with a port array instead of PORTSC addresses.
  USB: Set usb_hcd->state and flags for shared roothubs.
  usb: Make core allocate resources per PCI-device.
  usb: Store bus type in usb_hcd, not in driver flags.
  usb: Change usb_hcd->bandwidth_mutex to a pointer.
  ...
This commit is contained in:
Linus Torvalds
2011-03-16 15:04:26 -07:00
parent 2e270d8422 500132a0f2
commit 971f115a50
167 changed files with 10879 additions and 4080 deletions
Download Patch File Download Diff File Expand all files Collapse all files

195
drivers/usb/host/xhci-ring.c
View File

@@ -380,10 +380,8 @@ static struct xhci_segment *find_trb_seg(
while (cur_seg->trbs > trb ||
&cur_seg->trbs[TRBS_PER_SEGMENT - 1] < trb) {
generic_trb = &cur_seg->trbs[TRBS_PER_SEGMENT - 1].generic;
if ((generic_trb->field[3] & TRB_TYPE_BITMASK) ==
TRB_TYPE(TRB_LINK) &&
(generic_trb->field[3] & LINK_TOGGLE))
*cycle_state = ~(*cycle_state) & 0x1;
if (generic_trb->field[3] & LINK_TOGGLE)
*cycle_state ^= 0x1;
cur_seg = cur_seg->next;
if (cur_seg == start_seg)
/* Looped over the entire list. Oops! */
@@ -497,18 +495,29 @@ void xhci_find_new_dequeue_state(struct xhci_hcd *xhci,
trb = &state->new_deq_ptr->generic;
if ((trb->field[3] & TRB_TYPE_BITMASK) == TRB_TYPE(TRB_LINK) &&
(trb->field[3] & LINK_TOGGLE))
state->new_cycle_state = ~(state->new_cycle_state) & 0x1;
state->new_cycle_state ^= 0x1;
next_trb(xhci, ep_ring, &state->new_deq_seg, &state->new_deq_ptr);
/*
* If there is only one segment in a ring, find_trb_seg()'s while loop
* will not run, and it will return before it has a chance to see if it
* needs to toggle the cycle bit. It can't tell if the stalled transfer
* ended just before the link TRB on a one-segment ring, or if the TD
* wrapped around the top of the ring, because it doesn't have the TD in
* question. Look for the one-segment case where stalled TRB's address
* is greater than the new dequeue pointer address.
*/
if (ep_ring->first_seg == ep_ring->first_seg->next &&
state->new_deq_ptr < dev->eps[ep_index].stopped_trb)
state->new_cycle_state ^= 0x1;
xhci_dbg(xhci, "Cycle state = 0x%x\n", state->new_cycle_state);
/* Don't update the ring cycle state for the producer (us). */
xhci_dbg(xhci, "New dequeue segment = %p (virtual)\n",
state->new_deq_seg);
addr = xhci_trb_virt_to_dma(state->new_deq_seg, state->new_deq_ptr);
xhci_dbg(xhci, "New dequeue pointer = 0x%llx (DMA)\n",
(unsigned long long) addr);
xhci_dbg(xhci, "Setting dequeue pointer in internal ring state.\n");
ep_ring->dequeue = state->new_deq_ptr;
ep_ring->deq_seg = state->new_deq_seg;
}
static void td_to_noop(struct xhci_hcd *xhci, struct xhci_ring *ep_ring,
@@ -599,13 +608,14 @@ static inline void xhci_stop_watchdog_timer_in_irq(struct xhci_hcd *xhci,
static void xhci_giveback_urb_in_irq(struct xhci_hcd *xhci,
struct xhci_td *cur_td, int status, char *adjective)
{
struct usb_hcd *hcd = xhci_to_hcd(xhci);
struct usb_hcd *hcd;
struct urb *urb;
struct urb_priv *urb_priv;
urb = cur_td->urb;
urb_priv = urb->hcpriv;
urb_priv->td_cnt++;
hcd = bus_to_hcd(urb->dev->bus);
/* Only giveback urb when this is the last td in urb */
if (urb_priv->td_cnt == urb_priv->length) {
@@ -824,8 +834,7 @@ void xhci_stop_endpoint_command_watchdog(unsigned long arg)
if (ret < 0) {
/* This is bad; the host is not responding to commands and it's
* not allowing itself to be halted. At least interrupts are
* disabled, so we can set HC_STATE_HALT and notify the
* USB core. But if we call usb_hc_died(), it will attempt to
* disabled. If we call usb_hc_died(), it will attempt to
* disconnect all device drivers under this host. Those
* disconnect() methods will wait for all URBs to be unlinked,
* so we must complete them.
@@ -870,9 +879,8 @@ void xhci_stop_endpoint_command_watchdog(unsigned long arg)
}
}
spin_unlock(&xhci->lock);
xhci_to_hcd(xhci)->state = HC_STATE_HALT;
xhci_dbg(xhci, "Calling usb_hc_died()\n");
usb_hc_died(xhci_to_hcd(xhci));
usb_hc_died(xhci_to_hcd(xhci)->primary_hcd);
xhci_dbg(xhci, "xHCI host controller is dead.\n");
}
@@ -951,9 +959,26 @@ static void handle_set_deq_completion(struct xhci_hcd *xhci,
} else {
xhci_dbg(xhci, "Successful Set TR Deq Ptr cmd, deq = @%08llx\n",
ep_ctx->deq);
if (xhci_trb_virt_to_dma(dev->eps[ep_index].queued_deq_seg,
dev->eps[ep_index].queued_deq_ptr) ==
(ep_ctx->deq & ~(EP_CTX_CYCLE_MASK))) {
/* Update the ring's dequeue segment and dequeue pointer
* to reflect the new position.
*/
ep_ring->deq_seg = dev->eps[ep_index].queued_deq_seg;
ep_ring->dequeue = dev->eps[ep_index].queued_deq_ptr;
} else {
xhci_warn(xhci, "Mismatch between completed Set TR Deq "
"Ptr command & xHCI internal state.\n");
xhci_warn(xhci, "ep deq seg = %p, deq ptr = %p\n",
dev->eps[ep_index].queued_deq_seg,
dev->eps[ep_index].queued_deq_ptr);
}
}
dev->eps[ep_index].ep_state &= ~SET_DEQ_PENDING;
dev->eps[ep_index].queued_deq_seg = NULL;
dev->eps[ep_index].queued_deq_ptr = NULL;
/* Restart any rings with pending URBs */
ring_doorbell_for_active_rings(xhci, slot_id, ep_index);
}
@@ -1118,7 +1143,6 @@ bandwidth_change:
handle_set_deq_completion(xhci, event, xhci->cmd_ring->dequeue);
break;
case TRB_TYPE(TRB_CMD_NOOP):
++xhci->noops_handled;
break;
case TRB_TYPE(TRB_RESET_EP):
handle_reset_ep_completion(xhci, event, xhci->cmd_ring->dequeue);
@@ -1162,15 +1186,55 @@ static void handle_vendor_event(struct xhci_hcd *xhci,
handle_cmd_completion(xhci, &event->event_cmd);
}
/* @port_id: the one-based port ID from the hardware (indexed from array of all
* port registers -- USB 3.0 and USB 2.0).
*
* Returns a zero-based port number, which is suitable for indexing into each of
* the split roothubs' port arrays and bus state arrays.
*/
static unsigned int find_faked_portnum_from_hw_portnum(struct usb_hcd *hcd,
struct xhci_hcd *xhci, u32 port_id)
{
unsigned int i;
unsigned int num_similar_speed_ports = 0;
/* port_id from the hardware is 1-based, but port_array[], usb3_ports[],
* and usb2_ports are 0-based indexes. Count the number of similar
* speed ports, up to 1 port before this port.
*/
for (i = 0; i < (port_id - 1); i++) {
u8 port_speed = xhci->port_array[i];
/*
* Skip ports that don't have known speeds, or have duplicate
* Extended Capabilities port speed entries.
*/
if (port_speed == 0 || port_speed == -1)
continue;
/*
* USB 3.0 ports are always under a USB 3.0 hub. USB 2.0 and
* 1.1 ports are under the USB 2.0 hub. If the port speed
* matches the device speed, it's a similar speed port.
*/
if ((port_speed == 0x03) == (hcd->speed == HCD_USB3))
num_similar_speed_ports++;
}
return num_similar_speed_ports;
}
static void handle_port_status(struct xhci_hcd *xhci,
union xhci_trb *event)
{
struct usb_hcd *hcd = xhci_to_hcd(xhci);
struct usb_hcd *hcd;
u32 port_id;
u32 temp, temp1;
u32 __iomem *addr;
int ports;
int max_ports;
int slot_id;
unsigned int faked_port_index;
u8 major_revision;
struct xhci_bus_state *bus_state;
u32 __iomem **port_array;
/* Port status change events always have a successful completion code */
if (GET_COMP_CODE(event->generic.field[2]) != COMP_SUCCESS) {
@@ -1180,14 +1244,50 @@ static void handle_port_status(struct xhci_hcd *xhci,
port_id = GET_PORT_ID(event->generic.field[0]);
xhci_dbg(xhci, "Port Status Change Event for port %d\n", port_id);
ports = HCS_MAX_PORTS(xhci->hcs_params1);
if ((port_id <= 0) || (port_id > ports)) {
max_ports = HCS_MAX_PORTS(xhci->hcs_params1);
if ((port_id <= 0) || (port_id > max_ports)) {
xhci_warn(xhci, "Invalid port id %d\n", port_id);
goto cleanup;
}
addr = &xhci->op_regs->port_status_base + NUM_PORT_REGS * (port_id - 1);
temp = xhci_readl(xhci, addr);
/* Figure out which usb_hcd this port is attached to:
* is it a USB 3.0 port or a USB 2.0/1.1 port?
*/
major_revision = xhci->port_array[port_id - 1];
if (major_revision == 0) {
xhci_warn(xhci, "Event for port %u not in "
"Extended Capabilities, ignoring.\n",
port_id);
goto cleanup;
}
if (major_revision == (u8) -1) {
xhci_warn(xhci, "Event for port %u duplicated in"
"Extended Capabilities, ignoring.\n",
port_id);
goto cleanup;
}
/*
* Hardware port IDs reported by a Port Status Change Event include USB
* 3.0 and USB 2.0 ports. We want to check if the port has reported a
* resume event, but we first need to translate the hardware port ID
* into the index into the ports on the correct split roothub, and the
* correct bus_state structure.
*/
/* Find the right roothub. */
hcd = xhci_to_hcd(xhci);
if ((major_revision == 0x03) != (hcd->speed == HCD_USB3))
hcd = xhci->shared_hcd;
bus_state = &xhci->bus_state[hcd_index(hcd)];
if (hcd->speed == HCD_USB3)
port_array = xhci->usb3_ports;
else
port_array = xhci->usb2_ports;
/* Find the faked port hub number */
faked_port_index = find_faked_portnum_from_hw_portnum(hcd, xhci,
port_id);
temp = xhci_readl(xhci, port_array[faked_port_index]);
if (hcd->state == HC_STATE_SUSPENDED) {
xhci_dbg(xhci, "resume root hub\n");
usb_hcd_resume_root_hub(hcd);
@@ -1207,8 +1307,9 @@ static void handle_port_status(struct xhci_hcd *xhci,
temp = xhci_port_state_to_neutral(temp);
temp &= ~PORT_PLS_MASK;
temp |= PORT_LINK_STROBE | XDEV_U0;
xhci_writel(xhci, temp, addr);
slot_id = xhci_find_slot_id_by_port(xhci, port_id);
xhci_writel(xhci, temp, port_array[faked_port_index]);
slot_id = xhci_find_slot_id_by_port(hcd, xhci,
faked_port_index);
if (!slot_id) {
xhci_dbg(xhci, "slot_id is zero\n");
goto cleanup;
@@ -1216,16 +1317,16 @@ static void handle_port_status(struct xhci_hcd *xhci,
xhci_ring_device(xhci, slot_id);
xhci_dbg(xhci, "resume SS port %d finished\n", port_id);
/* Clear PORT_PLC */
temp = xhci_readl(xhci, addr);
temp = xhci_readl(xhci, port_array[faked_port_index]);
temp = xhci_port_state_to_neutral(temp);
temp |= PORT_PLC;
xhci_writel(xhci, temp, addr);
xhci_writel(xhci, temp, port_array[faked_port_index]);
} else {
xhci_dbg(xhci, "resume HS port %d\n", port_id);
xhci->resume_done[port_id - 1] = jiffies +
bus_state->resume_done[faked_port_index] = jiffies +
msecs_to_jiffies(20);
mod_timer(&hcd->rh_timer,
xhci->resume_done[port_id - 1]);
bus_state->resume_done[faked_port_index]);
/* Do the rest in GetPortStatus */
}
}
@@ -1236,7 +1337,7 @@ cleanup:
spin_unlock(&xhci->lock);
/* Pass this up to the core */
usb_hcd_poll_rh_status(xhci_to_hcd(xhci));
usb_hcd_poll_rh_status(hcd);
spin_lock(&xhci->lock);
}
@@ -1990,12 +2091,12 @@ cleanup:
trb_comp_code != COMP_BABBLE))
xhci_urb_free_priv(xhci, urb_priv);
usb_hcd_unlink_urb_from_ep(xhci_to_hcd(xhci), urb);
usb_hcd_unlink_urb_from_ep(bus_to_hcd(urb->dev->bus), urb);
xhci_dbg(xhci, "Giveback URB %p, len = %d, "
"status = %d\n",
urb, urb->actual_length, status);
spin_unlock(&xhci->lock);
usb_hcd_giveback_urb(xhci_to_hcd(xhci), urb, status);
usb_hcd_giveback_urb(bus_to_hcd(urb->dev->bus), urb, status);
spin_lock(&xhci->lock);
}
@@ -2119,7 +2220,6 @@ irqreturn_t xhci_irq(struct usb_hcd *hcd)
xhci_warn(xhci, "WARNING: Host System Error\n");
xhci_halt(xhci);
hw_died:
xhci_to_hcd(xhci)->state = HC_STATE_HALT;
spin_unlock(&xhci->lock);
return -ESHUTDOWN;
}
@@ -2187,8 +2287,12 @@ hw_died:
irqreturn_t xhci_msi_irq(int irq, struct usb_hcd *hcd)
{
irqreturn_t ret;
struct xhci_hcd *xhci;
xhci = hcd_to_xhci(hcd);
set_bit(HCD_FLAG_SAW_IRQ, &hcd->flags);
if (xhci->shared_hcd)
set_bit(HCD_FLAG_SAW_IRQ, &xhci->shared_hcd->flags);
ret = xhci_irq(hcd);
@@ -2332,7 +2436,7 @@ static int prepare_transfer(struct xhci_hcd *xhci,
INIT_LIST_HEAD(&td->cancelled_td_list);
if (td_index == 0) {
ret = usb_hcd_link_urb_to_ep(xhci_to_hcd(xhci), urb);
ret = usb_hcd_link_urb_to_ep(bus_to_hcd(urb->dev->bus), urb);
if (unlikely(ret)) {
xhci_urb_free_priv(xhci, urb_priv);
urb->hcpriv = NULL;
@@ -3131,24 +3235,6 @@ static int queue_command(struct xhci_hcd *xhci, u32 field1, u32 field2,
return 0;
}
/* Queue a no-op command on the command ring */
static int queue_cmd_noop(struct xhci_hcd *xhci)
{
return queue_command(xhci, 0, 0, 0, TRB_TYPE(TRB_CMD_NOOP), false);
}
/*
* Place a no-op command on the command ring to test the command and
* event ring.
*/
void *xhci_setup_one_noop(struct xhci_hcd *xhci)
{
if (queue_cmd_noop(xhci) < 0)
return NULL;
xhci->noops_submitted++;
return xhci_ring_cmd_db;
}
/* Queue a slot enable or disable request on the command ring */
int xhci_queue_slot_control(struct xhci_hcd *xhci, u32 trb_type, u32 slot_id)
{
@@ -3229,6 +3315,7 @@ static int queue_set_tr_deq(struct xhci_hcd *xhci, int slot_id,
u32 trb_ep_index = EP_ID_FOR_TRB(ep_index);
u32 trb_stream_id = STREAM_ID_FOR_TRB(stream_id);
u32 type = TRB_TYPE(TRB_SET_DEQ);
struct xhci_virt_ep *ep;
addr = xhci_trb_virt_to_dma(deq_seg, deq_ptr);
if (addr == 0) {
@@ -3237,6 +3324,14 @@ static int queue_set_tr_deq(struct xhci_hcd *xhci, int slot_id,
deq_seg, deq_ptr);
return 0;
}
ep = &xhci->devs[slot_id]->eps[ep_index];
if ((ep->ep_state & SET_DEQ_PENDING)) {
xhci_warn(xhci, "WARN Cannot submit Set TR Deq Ptr\n");
xhci_warn(xhci, "A Set TR Deq Ptr command is pending.\n");
return 0;
}
ep->queued_deq_seg = deq_seg;
ep->queued_deq_ptr = deq_ptr;
return queue_command(xhci, lower_32_bits(addr) | cycle_state,
upper_32_bits(addr), trb_stream_id,
trb_slot_id | trb_ep_index | type, false);