This patch (as1568) introduces symbolic constants for some of the
less-frequently used bitfields in the QH structure. This makes the
code a little easier to read and understand.
Signed-off-by: Alan Stern <stern@xxxxxxxxxxxxxxxxxxx>
---
drivers/usb/host/ehci-dbg.c | 6 +++---
drivers/usb/host/ehci-hcd.c | 2 +-
drivers/usb/host/ehci-q.c | 12 ++++++------
drivers/usb/host/ehci.h | 8 +++++++-
4 files changed, 17 insertions(+), 11 deletions(-)
Index: usb-3.4/drivers/usb/host/ehci.h
===================================================================
--- usb-3.4.orig/drivers/usb/host/ehci.h
+++ usb-3.4/drivers/usb/host/ehci.h
@@ -324,7 +324,13 @@ union ehci_shadow {
struct ehci_qh_hw {
__hc32 hw_next; /* see EHCI 3.6.1 */
__hc32 hw_info1; /* see EHCI 3.6.2 */
-#define QH_HEAD 0x00008000
+#define QH_CONTROL_EP (1 << 27) /* FS/LS control endpoint */
+#define QH_HEAD (1 << 15) /* Head of async reclamation list */
+#define QH_TOGGLE_CTL (1 << 14) /* Data toggle control */
+#define QH_HIGH_SPEED (2 << 12) /* Endpoint speed */
+#define QH_LOW_SPEED (1 << 12)
+#define QH_FULL_SPEED (0 << 12)
+#define QH_INACTIVATE (1 << 7) /* Inactivate on next transaction */
__hc32 hw_info2; /* see EHCI 3.6.2 */
#define QH_SMASK 0x000000ff
#define QH_CMASK 0x0000ff00
Index: usb-3.4/drivers/usb/host/ehci-dbg.c
===================================================================
--- usb-3.4.orig/drivers/usb/host/ehci-dbg.c
+++ usb-3.4/drivers/usb/host/ehci-dbg.c
@@ -404,9 +404,9 @@ struct debug_buffer {
#define speed_char(info1) ({ char tmp; \
switch (info1 & (3 << 12)) { \
- case 0 << 12: tmp = 'f'; break; \
- case 1 << 12: tmp = 'l'; break; \
- case 2 << 12: tmp = 'h'; break; \
+ case QH_FULL_SPEED: tmp = 'f'; break; \
+ case QH_LOW_SPEED: tmp = 'l'; break; \
+ case QH_HIGH_SPEED: tmp = 'h'; break; \
default: tmp = '?'; break; \
}; tmp; })
Index: usb-3.4/drivers/usb/host/ehci-hcd.c
===================================================================
--- usb-3.4.orig/drivers/usb/host/ehci-hcd.c
+++ usb-3.4/drivers/usb/host/ehci-hcd.c
@@ -667,7 +667,7 @@ static int ehci_init(struct usb_hcd *hcd
hw->hw_next = QH_NEXT(ehci, ehci->async->qh_dma);
hw->hw_info1 = cpu_to_hc32(ehci, QH_HEAD);
#if defined(CONFIG_PPC_PS3)
- hw->hw_info1 |= cpu_to_hc32(ehci, (1 << 7)); /* I = 1 */
+ hw->hw_info1 |= cpu_to_hc32(ehci, QH_INACTIVATE);
#endif
hw->hw_token = cpu_to_hc32(ehci, QTD_STS_HALT);
hw->hw_qtd_next = EHCI_LIST_END(ehci);
Index: usb-3.4/drivers/usb/host/ehci-q.c
===================================================================
--- usb-3.4.orig/drivers/usb/host/ehci-q.c
+++ usb-3.4/drivers/usb/host/ehci-q.c
@@ -100,7 +100,7 @@ qh_update (struct ehci_hcd *ehci, struct
* and set the pseudo-toggle in udev. Only usb_clear_halt() will
* ever clear it.
*/
- if (!(hw->hw_info1 & cpu_to_hc32(ehci, 1 << 14))) {
+ if (!(hw->hw_info1 & cpu_to_hc32(ehci, QH_TOGGLE_CTL))) {
unsigned is_out, epnum;
is_out = qh->is_out;
@@ -886,7 +886,7 @@ qh_make (
/* using TT? */
switch (urb->dev->speed) {
case USB_SPEED_LOW:
- info1 |= (1 << 12); /* EPS "low" */
+ info1 |= QH_LOW_SPEED;
/* FALL THROUGH */
case USB_SPEED_FULL:
@@ -894,8 +894,8 @@ qh_make (
if (type != PIPE_INTERRUPT)
info1 |= (EHCI_TUNE_RL_TT << 28);
if (type == PIPE_CONTROL) {
- info1 |= (1 << 27); /* for TT */
- info1 |= 1 << 14; /* toggle from qtd */
+ info1 |= QH_CONTROL_EP; /* for TT */
+ info1 |= QH_TOGGLE_CTL; /* toggle from qtd */
}
info1 |= maxp << 16;
@@ -920,11 +920,11 @@ qh_make (
break;
case USB_SPEED_HIGH: /* no TT involved */
- info1 |= (2 << 12); /* EPS "high" */
+ info1 |= QH_HIGH_SPEED;
if (type == PIPE_CONTROL) {
info1 |= (EHCI_TUNE_RL_HS << 28);
info1 |= 64 << 16; /* usb2 fixed maxpacket */
- info1 |= 1 << 14; /* toggle from qtd */
+ info1 |= QH_TOGGLE_CTL; /* toggle from qtd */
info2 |= (EHCI_TUNE_MULT_HS << 30);
} else if (type == PIPE_BULK) {
info1 |= (EHCI_TUNE_RL_HS << 28);
--
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