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[PATCH] usbcore: Remove hub_set_power_budget 

This patch removes the hub_set_power_budget routine, which was used by a
couple of HCDs to indicate that the root hub was running on battery power.
In its place is a new field added to struct usb_hcd, which HCDs can set
before the root hub is registered.  Special-case code in the hub driver
knows to look at this field when configuring a root hub.

Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Acked-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Alan Stern 2005-04-25 11:18:32 -04:00 committed by Greg Kroah-Hartman
parent f58f97fa9d
commit 7d35b92985
3 changed files with 10 additions and 14 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
drivers/usb/core/hcd.h
View File

@ -87,6 +87,7 @@ struct usb_hcd { /* usb_bus.hcpriv points to this */
void __iomem *regs; /* device memory/io */
u64 rsrc_start; /* memory/io resource start */
u64 rsrc_len; /* memory/io resource length */
unsigned power_budget; /* in mA, 0 = no limit */
#define HCD_BUFFER_POOLS 4
struct dma_pool *pool [HCD_BUFFER_POOLS];

12
drivers/usb/core/hub.c
View File

@ -643,15 +643,21 @@ static int hub_configure(struct usb_hub *hub,
message = "can't get hub status";
goto fail;
}
cpu_to_le16s(&hubstatus);
if ((hubstatus & (1 << USB_DEVICE_SELF_POWERED)) == 0) {
le16_to_cpus(&hubstatus);
if (hdev == hdev->bus->root_hub) {
struct usb_hcd *hcd =
container_of(hdev->bus, struct usb_hcd, self);
hub->power_budget = min(500u, hcd->power_budget) / 2;
} else if ((hubstatus & (1 << USB_DEVICE_SELF_POWERED)) == 0) {
dev_dbg(hub_dev, "hub controller current requirement: %dmA\n",
hub->descriptor->bHubContrCurrent);
hub->power_budget = (501 - hub->descriptor->bHubContrCurrent)
/ 2;
}
if (hub->power_budget)
dev_dbg(hub_dev, "%dmA bus power budget for children\n",
hub->power_budget * 2);
}
ret = hub_hub_status(hub, &hubstatus, &hubchange);

11
drivers/usb/core/hub.h
View File

@ -224,15 +224,4 @@ struct usb_hub {
struct work_struct leds;
};
/* use this for low-powered root hubs */
static inline void
hub_set_power_budget (struct usb_device *hubdev, unsigned mA)
{
struct usb_hub *hub;
hub = (struct usb_hub *)
usb_get_intfdata (hubdev->actconfig->interface[0]);
hub->power_budget = min(mA,(unsigned)500)/2;
}
#endif /* __LINUX_HUB_H */