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xhci: Remove some unnecessary casts and tidy some endian swap code

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Some of the recently-added cpu_to_leXX and leXX_to_cpu made things somewhat
messy; this patch neatens some of these areas, removing unnecessary casts
in those parts also.  In some places (where Y & Z are constants) a
comparison of (leXX_to_cpu(X) & Y) == Z has been replaced with
(X & cpu_to_leXX(Y)) == cpu_to_leXX(Z).  The endian reversal of the
constants should wash out at compile time.

Signed-off-by: Matt Evans <matt@ozlabs.org>
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
This commit is contained in:
Matt Evans 2011-06-01 10:22:55 +10:00 committed by Sarah Sharp
parent 55922c9d1b
commit f5960b698e
5 changed files with 52 additions and 55 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

22
drivers/usb/host/xhci-dbg.c
View File

@ -266,11 +266,11 @@ void xhci_debug_trb(struct xhci_hcd *xhci, union xhci_trb *trb)
xhci_dbg(xhci, "Interrupter target = 0x%x\n", xhci_dbg(xhci, "Interrupter target = 0x%x\n",
GET_INTR_TARGET(le32_to_cpu(trb->link.intr_target))); GET_INTR_TARGET(le32_to_cpu(trb->link.intr_target)));
xhci_dbg(xhci, "Cycle bit = %u\n", xhci_dbg(xhci, "Cycle bit = %u\n",
(unsigned int) (le32_to_cpu(trb->link.control) & TRB_CYCLE)); le32_to_cpu(trb->link.control) & TRB_CYCLE);
xhci_dbg(xhci, "Toggle cycle bit = %u\n", xhci_dbg(xhci, "Toggle cycle bit = %u\n",
(unsigned int) (le32_to_cpu(trb->link.control) & LINK_TOGGLE)); le32_to_cpu(trb->link.control) & LINK_TOGGLE);
xhci_dbg(xhci, "No Snoop bit = %u\n", xhci_dbg(xhci, "No Snoop bit = %u\n",
(unsigned int) (le32_to_cpu(trb->link.control) & TRB_NO_SNOOP)); le32_to_cpu(trb->link.control) & TRB_NO_SNOOP);
break; break;
case TRB_TYPE(TRB_TRANSFER): case TRB_TYPE(TRB_TRANSFER):
address = le64_to_cpu(trb->trans_event.buffer); address = le64_to_cpu(trb->trans_event.buffer);
@ -284,9 +284,9 @@ void xhci_debug_trb(struct xhci_hcd *xhci, union xhci_trb *trb)
address = le64_to_cpu(trb->event_cmd.cmd_trb); address = le64_to_cpu(trb->event_cmd.cmd_trb);
xhci_dbg(xhci, "Command TRB pointer = %llu\n", address); xhci_dbg(xhci, "Command TRB pointer = %llu\n", address);
xhci_dbg(xhci, "Completion status = %u\n", xhci_dbg(xhci, "Completion status = %u\n",
(unsigned int) GET_COMP_CODE(le32_to_cpu(trb->event_cmd.status))); GET_COMP_CODE(le32_to_cpu(trb->event_cmd.status)));
xhci_dbg(xhci, "Flags = 0x%x\n", xhci_dbg(xhci, "Flags = 0x%x\n",
(unsigned int) le32_to_cpu(trb->event_cmd.flags)); le32_to_cpu(trb->event_cmd.flags));
break; break;
default: default:
xhci_dbg(xhci, "Unknown TRB with TRB type ID %u\n", xhci_dbg(xhci, "Unknown TRB with TRB type ID %u\n",
@ -318,10 +318,10 @@ void xhci_debug_segment(struct xhci_hcd *xhci, struct xhci_segment *seg)
for (i = 0; i < TRBS_PER_SEGMENT; ++i) { for (i = 0; i < TRBS_PER_SEGMENT; ++i) {
trb = &seg->trbs[i]; trb = &seg->trbs[i];
xhci_dbg(xhci, "@%016llx %08x %08x %08x %08x\n", addr, xhci_dbg(xhci, "@%016llx %08x %08x %08x %08x\n", addr,
(u32)lower_32_bits(le64_to_cpu(trb->link.segment_ptr)), lower_32_bits(le64_to_cpu(trb->link.segment_ptr)),
(u32)upper_32_bits(le64_to_cpu(trb->link.segment_ptr)), upper_32_bits(le64_to_cpu(trb->link.segment_ptr)),
(unsigned int) le32_to_cpu(trb->link.intr_target), le32_to_cpu(trb->link.intr_target),
(unsigned int) le32_to_cpu(trb->link.control)); le32_to_cpu(trb->link.control));
addr += sizeof(*trb); addr += sizeof(*trb);
} }
} }
@ -402,8 +402,8 @@ void xhci_dbg_erst(struct xhci_hcd *xhci, struct xhci_erst *erst)
addr, addr,
lower_32_bits(le64_to_cpu(entry->seg_addr)), lower_32_bits(le64_to_cpu(entry->seg_addr)),
upper_32_bits(le64_to_cpu(entry->seg_addr)), upper_32_bits(le64_to_cpu(entry->seg_addr)),
(unsigned int) le32_to_cpu(entry->seg_size), le32_to_cpu(entry->seg_size),
(unsigned int) le32_to_cpu(entry->rsvd)); le32_to_cpu(entry->rsvd));
addr += sizeof(*entry); addr += sizeof(*entry);
} }
} }

26
drivers/usb/host/xhci-mem.c
View File

@ -89,8 +89,8 @@ static void xhci_link_segments(struct xhci_hcd *xhci, struct xhci_segment *prev,
return; return;
prev->next = next; prev->next = next;
if (link_trbs) { if (link_trbs) {
prev->trbs[TRBS_PER_SEGMENT-1].link. prev->trbs[TRBS_PER_SEGMENT-1].link.segment_ptr =
segment_ptr = cpu_to_le64(next->dma); cpu_to_le64(next->dma);
/* Set the last TRB in the segment to have a TRB type ID of Link TRB */ /* Set the last TRB in the segment to have a TRB type ID of Link TRB */
val = le32_to_cpu(prev->trbs[TRBS_PER_SEGMENT-1].link.control); val = le32_to_cpu(prev->trbs[TRBS_PER_SEGMENT-1].link.control);
@ -187,8 +187,8 @@ static struct xhci_ring *xhci_ring_alloc(struct xhci_hcd *xhci,
if (link_trbs) { if (link_trbs) {
/* See section 4.9.2.1 and 6.4.4.1 */ /* See section 4.9.2.1 and 6.4.4.1 */
prev->trbs[TRBS_PER_SEGMENT-1].link. prev->trbs[TRBS_PER_SEGMENT-1].link.control |=
control |= cpu_to_le32(LINK_TOGGLE); cpu_to_le32(LINK_TOGGLE);
xhci_dbg(xhci, "Wrote link toggle flag to" xhci_dbg(xhci, "Wrote link toggle flag to"
" segment %p (virtual), 0x%llx (DMA)\n", " segment %p (virtual), 0x%llx (DMA)\n",
prev, (unsigned long long)prev->dma); prev, (unsigned long long)prev->dma);
@ -549,8 +549,8 @@ struct xhci_stream_info *xhci_alloc_stream_info(struct xhci_hcd *xhci,
addr = cur_ring->first_seg->dma | addr = cur_ring->first_seg->dma |
SCT_FOR_CTX(SCT_PRI_TR) | SCT_FOR_CTX(SCT_PRI_TR) |
cur_ring->cycle_state; cur_ring->cycle_state;
stream_info->stream_ctx_array[cur_stream]. stream_info->stream_ctx_array[cur_stream].stream_ring =
stream_ring = cpu_to_le64(addr); cpu_to_le64(addr);
xhci_dbg(xhci, "Setting stream %d ring ptr to 0x%08llx\n", xhci_dbg(xhci, "Setting stream %d ring ptr to 0x%08llx\n",
cur_stream, (unsigned long long) addr); cur_stream, (unsigned long long) addr);
@ -786,7 +786,7 @@ int xhci_alloc_virt_device(struct xhci_hcd *xhci, int slot_id,
xhci_dbg(xhci, "Set slot id %d dcbaa entry %p to 0x%llx\n", xhci_dbg(xhci, "Set slot id %d dcbaa entry %p to 0x%llx\n",
slot_id, slot_id,
&xhci->dcbaa->dev_context_ptrs[slot_id], &xhci->dcbaa->dev_context_ptrs[slot_id],
(unsigned long long) le64_to_cpu(xhci->dcbaa->dev_context_ptrs[slot_id])); le64_to_cpu(xhci->dcbaa->dev_context_ptrs[slot_id]));
return 1; return 1;
fail: fail:
@ -890,19 +890,19 @@ int xhci_setup_addressable_virt_dev(struct xhci_hcd *xhci, struct usb_device *ud
ctrl_ctx->add_flags = cpu_to_le32(SLOT_FLAG | EP0_FLAG); ctrl_ctx->add_flags = cpu_to_le32(SLOT_FLAG | EP0_FLAG);
/* 3) Only the control endpoint is valid - one endpoint context */ /* 3) Only the control endpoint is valid - one endpoint context */
slot_ctx->dev_info |= cpu_to_le32(LAST_CTX(1) | (u32) udev->route); slot_ctx->dev_info |= cpu_to_le32(LAST_CTX(1) | udev->route);
switch (udev->speed) { switch (udev->speed) {
case USB_SPEED_SUPER: case USB_SPEED_SUPER:
slot_ctx->dev_info |= cpu_to_le32((u32) SLOT_SPEED_SS); slot_ctx->dev_info |= cpu_to_le32(SLOT_SPEED_SS);
break; break;
case USB_SPEED_HIGH: case USB_SPEED_HIGH:
slot_ctx->dev_info |= cpu_to_le32((u32) SLOT_SPEED_HS); slot_ctx->dev_info |= cpu_to_le32(SLOT_SPEED_HS);
break; break;
case USB_SPEED_FULL: case USB_SPEED_FULL:
slot_ctx->dev_info |= cpu_to_le32((u32) SLOT_SPEED_FS); slot_ctx->dev_info |= cpu_to_le32(SLOT_SPEED_FS);
break; break;
case USB_SPEED_LOW: case USB_SPEED_LOW:
slot_ctx->dev_info |= cpu_to_le32((u32) SLOT_SPEED_LS); slot_ctx->dev_info |= cpu_to_le32(SLOT_SPEED_LS);
break; break;
case USB_SPEED_WIRELESS: case USB_SPEED_WIRELESS:
xhci_dbg(xhci, "FIXME xHCI doesn't support wireless speeds\n"); xhci_dbg(xhci, "FIXME xHCI doesn't support wireless speeds\n");
@ -916,7 +916,7 @@ int xhci_setup_addressable_virt_dev(struct xhci_hcd *xhci, struct usb_device *ud
port_num = xhci_find_real_port_number(xhci, udev); port_num = xhci_find_real_port_number(xhci, udev);
if (!port_num) if (!port_num)
return -EINVAL; return -EINVAL;
slot_ctx->dev_info2 |= cpu_to_le32((u32) ROOT_HUB_PORT(port_num)); slot_ctx->dev_info2 |= cpu_to_le32(ROOT_HUB_PORT(port_num));
/* Set the port number in the virtual_device to the faked port number */ /* Set the port number in the virtual_device to the faked port number */
for (top_dev = udev; top_dev->parent && top_dev->parent->parent; for (top_dev = udev; top_dev->parent && top_dev->parent->parent;
top_dev = top_dev->parent) top_dev = top_dev->parent)

42
drivers/usb/host/xhci-ring.c
View File

@ -113,15 +113,13 @@ static int last_trb(struct xhci_hcd *xhci, struct xhci_ring *ring,
if (ring == xhci->event_ring) if (ring == xhci->event_ring)
return trb == &seg->trbs[TRBS_PER_SEGMENT]; return trb == &seg->trbs[TRBS_PER_SEGMENT];
else else
return (le32_to_cpu(trb->link.control) & TRB_TYPE_BITMASK) return TRB_TYPE_LINK_LE32(trb->link.control);
== TRB_TYPE(TRB_LINK);
} }
static int enqueue_is_link_trb(struct xhci_ring *ring) static int enqueue_is_link_trb(struct xhci_ring *ring)
{ {
struct xhci_link_trb *link = &ring->enqueue->link; struct xhci_link_trb *link = &ring->enqueue->link;
return ((le32_to_cpu(link->control) & TRB_TYPE_BITMASK) == return TRB_TYPE_LINK_LE32(link->control);
TRB_TYPE(TRB_LINK));
} }
/* Updates trb to point to the next TRB in the ring, and updates seg if the next /* Updates trb to point to the next TRB in the ring, and updates seg if the next
@ -372,7 +370,7 @@ static struct xhci_segment *find_trb_seg(
while (cur_seg->trbs > trb || while (cur_seg->trbs > trb ||
&cur_seg->trbs[TRBS_PER_SEGMENT - 1] < trb) { &cur_seg->trbs[TRBS_PER_SEGMENT - 1] < trb) {
generic_trb = &cur_seg->trbs[TRBS_PER_SEGMENT - 1].generic; generic_trb = &cur_seg->trbs[TRBS_PER_SEGMENT - 1].generic;
if (le32_to_cpu(generic_trb->field[3]) & LINK_TOGGLE) if (generic_trb->field[3] & cpu_to_le32(LINK_TOGGLE))
*cycle_state ^= 0x1; *cycle_state ^= 0x1;
cur_seg = cur_seg->next; cur_seg = cur_seg->next;
if (cur_seg == start_seg) if (cur_seg == start_seg)
@ -489,8 +487,8 @@ void xhci_find_new_dequeue_state(struct xhci_hcd *xhci,
} }
trb = &state->new_deq_ptr->generic; trb = &state->new_deq_ptr->generic;
if ((le32_to_cpu(trb->field[3]) & TRB_TYPE_BITMASK) == if (TRB_TYPE_LINK_LE32(trb->field[3]) &&
TRB_TYPE(TRB_LINK) && (le32_to_cpu(trb->field[3]) & LINK_TOGGLE)) (trb->field[3] & cpu_to_le32(LINK_TOGGLE)))
state->new_cycle_state ^= 0x1; state->new_cycle_state ^= 0x1;
next_trb(xhci, ep_ring, &state->new_deq_seg, &state->new_deq_ptr); next_trb(xhci, ep_ring, &state->new_deq_seg, &state->new_deq_ptr);
@ -525,8 +523,7 @@ static void td_to_noop(struct xhci_hcd *xhci, struct xhci_ring *ep_ring,
for (cur_seg = cur_td->start_seg, cur_trb = cur_td->first_trb; for (cur_seg = cur_td->start_seg, cur_trb = cur_td->first_trb;
true; true;
next_trb(xhci, ep_ring, &cur_seg, &cur_trb)) { next_trb(xhci, ep_ring, &cur_seg, &cur_trb)) {
if ((le32_to_cpu(cur_trb->generic.field[3]) & TRB_TYPE_BITMASK) if (TRB_TYPE_LINK_LE32(cur_trb->generic.field[3])) {
== TRB_TYPE(TRB_LINK)) {
/* Unchain any chained Link TRBs, but /* Unchain any chained Link TRBs, but
* leave the pointers intact. * leave the pointers intact.
*/ */
@ -1000,7 +997,7 @@ static void handle_reset_ep_completion(struct xhci_hcd *xhci,
* but we don't care. * but we don't care.
*/ */
xhci_dbg(xhci, "Ignoring reset ep completion code of %u\n", xhci_dbg(xhci, "Ignoring reset ep completion code of %u\n",
(unsigned int) GET_COMP_CODE(le32_to_cpu(event->status))); GET_COMP_CODE(le32_to_cpu(event->status)));
/* HW with the reset endpoint quirk needs to have a configure endpoint /* HW with the reset endpoint quirk needs to have a configure endpoint
* command complete before the endpoint can be used. Queue that here * command complete before the endpoint can be used. Queue that here
@ -1458,7 +1455,8 @@ static int xhci_requires_manual_halt_cleanup(struct xhci_hcd *xhci,
* endpoint anyway. Check if a babble halted the * endpoint anyway. Check if a babble halted the
* endpoint. * endpoint.
*/ */
if ((le32_to_cpu(ep_ctx->ep_info) & EP_STATE_MASK) == EP_STATE_HALTED) if ((ep_ctx->ep_info & cpu_to_le32(EP_STATE_MASK)) ==
cpu_to_le32(EP_STATE_HALTED))
return 1; return 1;
return 0; return 0;
@ -1752,10 +1750,8 @@ static int process_isoc_td(struct xhci_hcd *xhci, struct xhci_td *td,
for (cur_trb = ep_ring->dequeue, for (cur_trb = ep_ring->dequeue,
cur_seg = ep_ring->deq_seg; cur_trb != event_trb; cur_seg = ep_ring->deq_seg; cur_trb != event_trb;
next_trb(xhci, ep_ring, &cur_seg, &cur_trb)) { next_trb(xhci, ep_ring, &cur_seg, &cur_trb)) {
if ((le32_to_cpu(cur_trb->generic.field[3]) & if (!TRB_TYPE_NOOP_LE32(cur_trb->generic.field[3]) &&
TRB_TYPE_BITMASK) != TRB_TYPE(TRB_TR_NOOP) && !TRB_TYPE_LINK_LE32(cur_trb->generic.field[3]))
(le32_to_cpu(cur_trb->generic.field[3]) &
TRB_TYPE_BITMASK) != TRB_TYPE(TRB_LINK))
len += TRB_LEN(le32_to_cpu(cur_trb->generic.field[2])); len += TRB_LEN(le32_to_cpu(cur_trb->generic.field[2]));
} }
len += TRB_LEN(le32_to_cpu(cur_trb->generic.field[2])) - len += TRB_LEN(le32_to_cpu(cur_trb->generic.field[2])) -
@ -1888,10 +1884,8 @@ static int process_bulk_intr_td(struct xhci_hcd *xhci, struct xhci_td *td,
for (cur_trb = ep_ring->dequeue, cur_seg = ep_ring->deq_seg; for (cur_trb = ep_ring->dequeue, cur_seg = ep_ring->deq_seg;
cur_trb != event_trb; cur_trb != event_trb;
next_trb(xhci, ep_ring, &cur_seg, &cur_trb)) { next_trb(xhci, ep_ring, &cur_seg, &cur_trb)) {
if ((le32_to_cpu(cur_trb->generic.field[3]) & if (!TRB_TYPE_NOOP_LE32(cur_trb->generic.field[3]) &&
TRB_TYPE_BITMASK) != TRB_TYPE(TRB_TR_NOOP) && !TRB_TYPE_LINK_LE32(cur_trb->generic.field[3]))
(le32_to_cpu(cur_trb->generic.field[3]) &
TRB_TYPE_BITMASK) != TRB_TYPE(TRB_LINK))
td->urb->actual_length += td->urb->actual_length +=
TRB_LEN(le32_to_cpu(cur_trb->generic.field[2])); TRB_LEN(le32_to_cpu(cur_trb->generic.field[2]));
} }
@ -2046,8 +2040,8 @@ static int handle_tx_event(struct xhci_hcd *xhci,
TRB_TO_SLOT_ID(le32_to_cpu(event->flags)), TRB_TO_SLOT_ID(le32_to_cpu(event->flags)),
ep_index); ep_index);
xhci_dbg(xhci, "Event TRB with TRB type ID %u\n", xhci_dbg(xhci, "Event TRB with TRB type ID %u\n",
(unsigned int) (le32_to_cpu(event->flags) (le32_to_cpu(event->flags) &
& TRB_TYPE_BITMASK)>>10); TRB_TYPE_BITMASK)>>10);
xhci_print_trb_offsets(xhci, (union xhci_trb *) event); xhci_print_trb_offsets(xhci, (union xhci_trb *) event);
if (ep->skip) { if (ep->skip) {
ep->skip = false; ep->skip = false;
@ -2104,9 +2098,7 @@ static int handle_tx_event(struct xhci_hcd *xhci,
* corresponding TD has been cancelled. Just ignore * corresponding TD has been cancelled. Just ignore
* the TD. * the TD.
*/ */
if ((le32_to_cpu(event_trb->generic.field[3]) if (TRB_TYPE_NOOP_LE32(event_trb->generic.field[3])) {
& TRB_TYPE_BITMASK)
== TRB_TYPE(TRB_TR_NOOP)) {
xhci_dbg(xhci, xhci_dbg(xhci,
"event_trb is a no-op TRB. Skip it\n"); "event_trb is a no-op TRB. Skip it\n");
goto cleanup; goto cleanup;
@ -2432,7 +2424,7 @@ static int prepare_ring(struct xhci_hcd *xhci, struct xhci_ring *ep_ring,
next->link.control |= cpu_to_le32(TRB_CHAIN); next->link.control |= cpu_to_le32(TRB_CHAIN);
wmb(); wmb();
next->link.control ^= cpu_to_le32((u32) TRB_CYCLE); next->link.control ^= cpu_to_le32(TRB_CYCLE);
/* Toggle the cycle bit after the last ring segment. */ /* Toggle the cycle bit after the last ring segment. */
if (last_trb_on_last_seg(xhci, ring, ring->enq_seg, next)) { if (last_trb_on_last_seg(xhci, ring, ring->enq_seg, next)) {

10
drivers/usb/host/xhci.c
View File

@ -1333,8 +1333,8 @@ int xhci_drop_endpoint(struct usb_hcd *hcd, struct usb_device *udev,
/* If the HC already knows the endpoint is disabled, /* If the HC already knows the endpoint is disabled,
* or the HCD has noted it is disabled, ignore this request * or the HCD has noted it is disabled, ignore this request
*/ */
if ((le32_to_cpu(ep_ctx->ep_info) & EP_STATE_MASK) == if (((ep_ctx->ep_info & cpu_to_le32(EP_STATE_MASK)) ==
EP_STATE_DISABLED || cpu_to_le32(EP_STATE_DISABLED)) ||
le32_to_cpu(ctrl_ctx->drop_flags) & le32_to_cpu(ctrl_ctx->drop_flags) &
xhci_get_endpoint_flag(&ep->desc)) { xhci_get_endpoint_flag(&ep->desc)) {
xhci_warn(xhci, "xHCI %s called with disabled ep %p\n", xhci_warn(xhci, "xHCI %s called with disabled ep %p\n",
@ -1725,8 +1725,7 @@ static int xhci_configure_endpoint(struct xhci_hcd *xhci,
/* Enqueue pointer can be left pointing to the link TRB, /* Enqueue pointer can be left pointing to the link TRB,
* we must handle that * we must handle that
*/ */
if ((le32_to_cpu(command->command_trb->link.control) if (TRB_TYPE_LINK_LE32(command->command_trb->link.control))
& TRB_TYPE_BITMASK) == TRB_TYPE(TRB_LINK))
command->command_trb = command->command_trb =
xhci->cmd_ring->enq_seg->next->trbs; xhci->cmd_ring->enq_seg->next->trbs;
@ -2519,8 +2518,7 @@ int xhci_discover_or_reset_device(struct usb_hcd *hcd, struct usb_device *udev)
/* Enqueue pointer can be left pointing to the link TRB, /* Enqueue pointer can be left pointing to the link TRB,
* we must handle that * we must handle that
*/ */
if ((le32_to_cpu(reset_device_cmd->command_trb->link.control) if (TRB_TYPE_LINK_LE32(reset_device_cmd->command_trb->link.control))
& TRB_TYPE_BITMASK) == TRB_TYPE(TRB_LINK))
reset_device_cmd->command_trb = reset_device_cmd->command_trb =
xhci->cmd_ring->enq_seg->next->trbs; xhci->cmd_ring->enq_seg->next->trbs;

7
drivers/usb/host/xhci.h
View File

@ -1065,6 +1065,13 @@ union xhci_trb {
/* Get NEC firmware revision. */ /* Get NEC firmware revision. */
#define TRB_NEC_GET_FW 49 #define TRB_NEC_GET_FW 49
#define TRB_TYPE_LINK(x) (((x) & TRB_TYPE_BITMASK) == TRB_TYPE(TRB_LINK))
/* Above, but for __le32 types -- can avoid work by swapping constants: */
#define TRB_TYPE_LINK_LE32(x) (((x) & cpu_to_le32(TRB_TYPE_BITMASK)) == \
cpu_to_le32(TRB_TYPE(TRB_LINK)))
#define TRB_TYPE_NOOP_LE32(x) (((x) & cpu_to_le32(TRB_TYPE_BITMASK)) == \
cpu_to_le32(TRB_TYPE(TRB_TR_NOOP)))
#define NEC_FW_MINOR(p) (((p) >> 0) & 0xff) #define NEC_FW_MINOR(p) (((p) >> 0) & 0xff)
#define NEC_FW_MAJOR(p) (((p) >> 8) & 0xff) #define NEC_FW_MAJOR(p) (((p) >> 8) & 0xff)