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USB: UHCI: Allow dynamic assignment of bus specific functions

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This patch is part of a series that extend the UHCI HCD to support
non-PCI controllers.

This patch changes calls to uhci_reset_hc, uhci_check_and_reset_hc,
configure_hc, resume_detect_interrupts_are_broken and
global_suspend_mode_is_broken so that they are made through pointers
in the uhci hcd struct. This will allow these functions to be replaced
with bus/arch specific functions.

Signed-off-by: Jan Andersson <jan@gaisler.com>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Jan Andersson 2011-05-06 12:00:13 +02:00 committed by Greg Kroah-Hartman
parent dfeca7a875
commit e7652e1ebc
2 changed files with 78 additions and 19 deletions
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87
drivers/usb/host/uhci-hcd.c
View File

@ -142,6 +142,15 @@ static void finish_reset(struct uhci_hcd *uhci)
clear_bit(HCD_FLAG_POLL_RH, &uhci_to_hcd(uhci)->flags);
}
/*
* Make sure the controller is completely inactive, unable to
* generate interrupts or do DMA.
*/
static void uhci_pci_reset_hc(struct uhci_hcd *uhci)
{
uhci_reset_hc(to_pci_dev(uhci_dev(uhci)), uhci->io_addr);
}
/*
* Last rites for a defunct/nonfunctional controller
* or one we don't want to use any more.
@ -149,7 +158,7 @@ static void finish_reset(struct uhci_hcd *uhci)
static void uhci_hc_died(struct uhci_hcd *uhci)
{
uhci_get_current_frame_number(uhci);
uhci_reset_hc(to_pci_dev(uhci_dev(uhci)), uhci->io_addr);
uhci->reset_hc(uhci);
finish_reset(uhci);
uhci->dead = 1;
@ -157,6 +166,18 @@ static void uhci_hc_died(struct uhci_hcd *uhci)
++uhci->frame_number;
}
/*
* Initialize a controller that was newly discovered or has just been
* resumed. In either case we can't be sure of its previous state.
*
* Returns: 1 if the controller was reset, 0 otherwise.
*/
static int uhci_pci_check_and_reset_hc(struct uhci_hcd *uhci)
{
return uhci_check_and_reset_hc(to_pci_dev(uhci_dev(uhci)),
uhci->io_addr);
}
/*
* Initialize a controller that was newly discovered or has lost power
* or otherwise been reset while it was suspended. In none of these cases
@ -164,17 +185,27 @@ static void uhci_hc_died(struct uhci_hcd *uhci)
*/
static void check_and_reset_hc(struct uhci_hcd *uhci)
{
if (uhci_check_and_reset_hc(to_pci_dev(uhci_dev(uhci)), uhci->io_addr))
if (uhci->check_and_reset_hc(uhci))
finish_reset(uhci);
}
static void uhci_pci_configure_hc(struct uhci_hcd *uhci)
{
struct pci_dev *pdev = to_pci_dev(uhci_dev(uhci));
/* Enable PIRQ */
pci_write_config_word(pdev, USBLEGSUP, USBLEGSUP_DEFAULT);
/* Disable platform-specific non-PME# wakeup */
if (pdev->vendor == PCI_VENDOR_ID_INTEL)
pci_write_config_byte(pdev, USBRES_INTEL, 0);
}
/*
* Store the basic register settings needed by the controller.
*/
static void configure_hc(struct uhci_hcd *uhci)
{
struct pci_dev *pdev = to_pci_dev(uhci_dev(uhci));
/* Set the frame length to the default: 1 ms exactly */
outb(USBSOF_DEFAULT, uhci->io_addr + USBSOF);
@ -185,24 +216,15 @@ static void configure_hc(struct uhci_hcd *uhci)
outw(uhci->frame_number & UHCI_MAX_SOF_NUMBER,
uhci->io_addr + USBFRNUM);
/* Enable PIRQ */
pci_write_config_word(pdev, USBLEGSUP, USBLEGSUP_DEFAULT);
/* Disable platform-specific non-PME# wakeup */
if (pdev->vendor == PCI_VENDOR_ID_INTEL)
pci_write_config_byte(pdev, USBRES_INTEL, 0);
/* perform any arch/bus specific configuration */
if (uhci->configure_hc)
uhci->configure_hc(uhci);
}
static int resume_detect_interrupts_are_broken(struct uhci_hcd *uhci)
static int uhci_pci_resume_detect_interrupts_are_broken(struct uhci_hcd *uhci)
{
int port;
/* If we have to ignore overcurrent events then almost by definition
* we can't depend on resume-detect interrupts. */
if (ignore_oc)
return 1;
switch (to_pci_dev(uhci_dev(uhci))->vendor) {
default:
break;
@ -231,7 +253,18 @@ static int resume_detect_interrupts_are_broken(struct uhci_hcd *uhci)
return 0;
}
static int global_suspend_mode_is_broken(struct uhci_hcd *uhci)
static int resume_detect_interrupts_are_broken(struct uhci_hcd *uhci)
{
/* If we have to ignore overcurrent events then almost by definition
* we can't depend on resume-detect interrupts. */
if (ignore_oc)
return 1;
return uhci->resume_detect_interrupts_are_broken ?
uhci->resume_detect_interrupts_are_broken(uhci) : 0;
}
static int uhci_pci_global_suspend_mode_is_broken(struct uhci_hcd *uhci)
{
int port;
const char *sys_info;
@ -253,6 +286,12 @@ static int global_suspend_mode_is_broken(struct uhci_hcd *uhci)
return 0;
}
static int global_suspend_mode_is_broken(struct uhci_hcd *uhci)
{
return uhci->global_suspend_mode_is_broken ?
uhci->global_suspend_mode_is_broken(uhci) : 0;
}
static void suspend_rh(struct uhci_hcd *uhci, enum uhci_rh_state new_state)
__releases(uhci->lock)
__acquires(uhci->lock)
@ -557,6 +596,16 @@ static int uhci_init(struct usb_hcd *hcd)
if (to_pci_dev(uhci_dev(uhci))->vendor == PCI_VENDOR_ID_HP)
uhci->wait_for_hp = 1;
/* Set up pointers to PCI-specific functions */
uhci->reset_hc = uhci_pci_reset_hc;
uhci->check_and_reset_hc = uhci_pci_check_and_reset_hc;
uhci->configure_hc = uhci_pci_configure_hc;
uhci->resume_detect_interrupts_are_broken =
uhci_pci_resume_detect_interrupts_are_broken;
uhci->global_suspend_mode_is_broken =
uhci_pci_global_suspend_mode_is_broken;
/* Kick BIOS off this hardware and reset if the controller
* isn't already safely quiescent.
*/
@ -847,7 +896,7 @@ static int uhci_pci_resume(struct usb_hcd *hcd, bool hibernated)
/* Make sure resume from hibernation re-enumerates everything */
if (hibernated) {
uhci_reset_hc(to_pci_dev(uhci_dev(uhci)), uhci->io_addr);
uhci->reset_hc(uhci);
finish_reset(uhci);
}

10
drivers/usb/host/uhci-hcd.h
View File

@ -433,6 +433,16 @@ struct uhci_hcd {
int total_load; /* Sum of array values */
short load[MAX_PHASE]; /* Periodic allocations */
/* Reset host controller */
void (*reset_hc) (struct uhci_hcd *uhci);
int (*check_and_reset_hc) (struct uhci_hcd *uhci);
/* configure_hc should perform arch specific settings, if needed */
void (*configure_hc) (struct uhci_hcd *uhci);
/* Check for broken resume detect interrupts */
int (*resume_detect_interrupts_are_broken) (struct uhci_hcd *uhci);
/* Check for broken global suspend */
int (*global_suspend_mode_is_broken) (struct uhci_hcd *uhci);
};
/* Convert between a usb_hcd pointer and the corresponding uhci_hcd */