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[PATCH] USB UHCI: Minor improvements

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This patch makes a few small improvements in the UHCI driver.  Some
code is moved between different source files and a more useful pointer
is passed to a callback routine.

Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Alan Stern 2005-04-09 17:26:00 -04:00 committed by Greg Kroah-Hartman
parent 014e73c99a
commit f5946f8220
3 changed files with 55 additions and 53 deletions
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69
drivers/usb/host/uhci-hcd.c
View File

@ -100,22 +100,15 @@ static void uhci_get_current_frame_number(struct uhci_hcd *uhci);
/* to make sure it doesn't hog all of the bandwidth */
#define DEPTH_INTERVAL 5
static inline void restart_timer(struct uhci_hcd *uhci)
{
mod_timer(&uhci->stall_timer, jiffies + msecs_to_jiffies(100));
}
#include "uhci-hub.c"
#include "uhci-debug.c"
#include "uhci-q.c"
static int ports_active(struct uhci_hcd *uhci)
{
unsigned long io_addr = uhci->io_addr;
int connection = 0;
int i;
for (i = 0; i < uhci->rh_numports; i++)
connection |= (inw(io_addr + USBPORTSC1 + i * 2) & USBPORTSC_CCS);
return connection;
}
static int suspend_allowed(struct uhci_hcd *uhci)
{
unsigned long io_addr = uhci->io_addr;
@ -270,14 +263,14 @@ static void hc_state_transitions(struct uhci_hcd *uhci)
case UHCI_RUNNING:
/* global suspend if nothing connected for 1 second */
if (!ports_active(uhci) && suspend_allowed(uhci)) {
if (!any_ports_active(uhci) && suspend_allowed(uhci)) {
uhci->state = UHCI_SUSPENDING_GRACE;
uhci->state_end = jiffies + HZ;
}
break;
case UHCI_SUSPENDING_GRACE:
if (ports_active(uhci))
if (any_ports_active(uhci))
uhci->state = UHCI_RUNNING;
else if (time_after_eq(jiffies, uhci->state_end))
suspend_hc(uhci);
@ -302,58 +295,24 @@ static void hc_state_transitions(struct uhci_hcd *uhci)
}
}
static int init_stall_timer(struct usb_hcd *hcd);
static void stall_callback(unsigned long ptr)
static void stall_callback(unsigned long _uhci)
{
struct usb_hcd *hcd = (struct usb_hcd *)ptr;
struct uhci_hcd *uhci = hcd_to_uhci(hcd);
struct urb_priv *up;
struct uhci_hcd *uhci = (struct uhci_hcd *) _uhci;
unsigned long flags;
spin_lock_irqsave(&uhci->lock, flags);
uhci_scan_schedule(uhci, NULL);
list_for_each_entry(up, &uhci->urb_list, urb_list) {
struct urb *u = up->urb;
spin_lock(&u->lock);
/* Check if the FSBR timed out */
if (up->fsbr && !up->fsbr_timeout && time_after_eq(jiffies, up->fsbrtime + IDLE_TIMEOUT))
uhci_fsbr_timeout(uhci, u);
spin_unlock(&u->lock);
}
/* Really disable FSBR */
if (!uhci->fsbr && uhci->fsbrtimeout && time_after_eq(jiffies, uhci->fsbrtimeout)) {
uhci->fsbrtimeout = 0;
uhci->skel_term_qh->link = UHCI_PTR_TERM;
}
check_fsbr(uhci);
/* Poll for and perform state transitions */
hc_state_transitions(uhci);
if (unlikely(uhci->suspended_ports && uhci->state != UHCI_SUSPENDED))
uhci_check_ports(uhci);
init_stall_timer(hcd);
restart_timer(uhci);
spin_unlock_irqrestore(&uhci->lock, flags);
}
static int init_stall_timer(struct usb_hcd *hcd)
{
struct uhci_hcd *uhci = hcd_to_uhci(hcd);
init_timer(&uhci->stall_timer);
uhci->stall_timer.function = stall_callback;
uhci->stall_timer.data = (unsigned long)hcd;
uhci->stall_timer.expires = jiffies + msecs_to_jiffies(100);
add_timer(&uhci->stall_timer);
return 0;
}
static irqreturn_t uhci_irq(struct usb_hcd *hcd, struct pt_regs *regs)
{
struct uhci_hcd *uhci = hcd_to_uhci(hcd);
@ -509,6 +468,10 @@ static int uhci_start(struct usb_hcd *hcd)
init_waitqueue_head(&uhci->waitqh);
init_timer(&uhci->stall_timer);
uhci->stall_timer.function = stall_callback;
uhci->stall_timer.data = (unsigned long) uhci;
uhci->fl = dma_alloc_coherent(uhci_dev(uhci), sizeof(*uhci->fl),
&dma_handle, 0);
if (!uhci->fl) {
@ -646,7 +609,7 @@ static int uhci_start(struct usb_hcd *hcd)
if ((retval = start_hc(uhci)) != 0)
goto err_alloc_skelqh;
init_stall_timer(hcd);
restart_timer(uhci);
udev->speed = USB_SPEED_FULL;

16
drivers/usb/host/uhci-hub.c
View File

@ -33,6 +33,22 @@ static __u8 root_hub_hub_des[] =
/* status change bits: nonzero writes will clear */
#define RWC_BITS (USBPORTSC_OCC | USBPORTSC_PEC | USBPORTSC_CSC)
/* A port that either is connected or has a changed-bit set will prevent
* us from AUTO_STOPPING.
*/
static int any_ports_active(struct uhci_hcd *uhci)
{
int port;
for (port = 0; port < uhci->rh_numports; ++port) {
if ((inw(uhci->io_addr + USBPORTSC1 + port * 2) &
(USBPORTSC_CCS | RWC_BITS)) ||
test_bit(port, &uhci->port_c_suspend))
return 1;
}
return 0;
}
static int uhci_hub_status_data(struct usb_hcd *hcd, char *buf)
{
struct uhci_hcd *uhci = hcd_to_uhci(hcd);

23
drivers/usb/host/uhci-q.c
View File

@ -1537,3 +1537,26 @@ static void uhci_scan_schedule(struct uhci_hcd *uhci, struct pt_regs *regs)
/* Wake up anyone waiting for an URB to complete */
wake_up_all(&uhci->waitqh);
}
static void check_fsbr(struct uhci_hcd *uhci)
{
struct urb_priv *up;
list_for_each_entry(up, &uhci->urb_list, urb_list) {
struct urb *u = up->urb;
spin_lock(&u->lock);
/* Check if the FSBR timed out */
if (up->fsbr && !up->fsbr_timeout && time_after_eq(jiffies, up->fsbrtime + IDLE_TIMEOUT))
uhci_fsbr_timeout(uhci, u);
spin_unlock(&u->lock);
}
/* Really disable FSBR */
if (!uhci->fsbr && uhci->fsbrtimeout && time_after_eq(jiffies, uhci->fsbrtimeout)) {
uhci->fsbrtimeout = 0;
uhci->skel_term_qh->link = UHCI_PTR_TERM;
}
}