diff options
author | Gabor Juhos <juhosg@openwrt.org> | 2007-11-08 12:28:27 +0000 |
---|---|---|
committer | Gabor Juhos <juhosg@openwrt.org> | 2007-11-08 12:28:27 +0000 |
commit | 729f4259193979af5c442616e86c0bc25c4b7e7f (patch) | |
tree | 83cf38f5a7c5e5368f2329a53cf5213b0a264fcf /target/linux/adm5120/files/drivers/usb/host/adm5120-hub.c | |
parent | eaca6d017264a9501262d76f4d7b8ec494fee1d2 (diff) | |
download | upstream-729f4259193979af5c442616e86c0bc25c4b7e7f.tar.gz upstream-729f4259193979af5c442616e86c0bc25c4b7e7f.tar.bz2 upstream-729f4259193979af5c442616e86c0bc25c4b7e7f.zip |
[adm5120] USB driver fixes
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@9513 3c298f89-4303-0410-b956-a3cf2f4a3e73
Diffstat (limited to 'target/linux/adm5120/files/drivers/usb/host/adm5120-hub.c')
-rw-r--r-- | target/linux/adm5120/files/drivers/usb/host/adm5120-hub.c | 364 |
1 files changed, 5 insertions, 359 deletions
diff --git a/target/linux/adm5120/files/drivers/usb/host/adm5120-hub.c b/target/linux/adm5120/files/drivers/usb/host/adm5120-hub.c index dc1a4a52d7..48e61e9880 100644 --- a/target/linux/adm5120/files/drivers/usb/host/adm5120-hub.c +++ b/target/linux/adm5120/files/drivers/usb/host/adm5120-hub.c @@ -58,7 +58,7 @@ /*-------------------------------------------------------------------------*/ /* hcd->hub_irq_enable() */ -static void admhc_rhsc_enable(struct usb_hcd *hcd) +static void admhc_hub_irq_enable(struct usb_hcd *hcd) { struct admhcd *ahcd = hcd_to_admhcd(hcd); @@ -69,360 +69,6 @@ static void admhc_rhsc_enable(struct usb_hcd *hcd) spin_unlock_irq(&ahcd->lock); } -#define OHCI_SCHED_ENABLES \ - (OHCI_CTRL_CLE|OHCI_CTRL_BLE|OHCI_CTRL_PLE|OHCI_CTRL_IE) - -#ifdef CONFIG_PM -static int admhc_restart(struct admhcd *ahcd); - -static int admhc_rh_suspend(struct admhcd *ahcd, int autostop) -__releases(ahcd->lock) -__acquires(ahcd->lock) -{ - int status = 0; - - ahcd->hc_control = admhc_readl(ahcd, &ahcd->regs->control); - switch (ahcd->hc_control & OHCI_CTRL_HCFS) { - case OHCI_USB_RESUME: - admhc_dbg(ahcd, "resume/suspend?\n"); - ahcd->hc_control &= ~OHCI_CTRL_HCFS; - ahcd->hc_control |= OHCI_USB_RESET; - admhc_writel(ahcd, ahcd->hc_control, &ahcd->ahcd->regs->control); - (void) admhc_readl(ahcd, &ahcd->regs->control); - /* FALL THROUGH */ - case OHCI_USB_RESET: - status = -EBUSY; - admhc_dbg(ahcd, "needs reinit!\n"); - goto done; - case OHCI_USB_SUSPEND: - if (!ahcd->autostop) { - admhc_dbg(ahcd, "already suspended\n"); - goto done; - } - } - admhc_dbg(ahcd, "%s root hub\n", - autostop ? "auto-stop" : "suspend"); - - /* First stop any processing */ - if (!autostop && (ahcd->hc_control & OHCI_SCHED_ENABLES)) { - ahcd->hc_control &= ~OHCI_SCHED_ENABLES; - admhc_writel(ahcd, ahcd->hc_control, &ahcd->ahcd->regs->control); - ahcd->hc_control = admhc_readl(ahcd, &ahcd->regs->control); - admhc_writel(ahcd, OHCI_INTR_SF, &ahcd->regs->intrstatus); - - /* sched disables take effect on the next frame, - * then the last WDH could take 6+ msec - */ - admhc_dbg(ahcd, "stopping schedules ...\n"); - ahcd->autostop = 0; - spin_unlock_irq (&ahcd->lock); - msleep (8); - spin_lock_irq (&ahcd->lock); - } - dl_done_list (ahcd); - finish_unlinks (ahcd, admhc_frame_no(ahcd)); - - /* maybe resume can wake root hub */ - if (device_may_wakeup(&admhcd_to_hcd(ahcd)->self.root_hub->dev) || - autostop) - ahcd->hc_control |= OHCI_CTRL_RWE; - else { - admhc_writel(ahcd, OHCI_INTR_RHSC, &ahcd->regs->intrdisable); - ahcd->hc_control &= ~OHCI_CTRL_RWE; - } - - /* Suspend hub ... this is the "global (to this bus) suspend" mode, - * which doesn't imply ports will first be individually suspended. - */ - ahcd->hc_control &= ~OHCI_CTRL_HCFS; - ahcd->hc_control |= OHCI_USB_SUSPEND; - admhc_writel(ahcd, ahcd->hc_control, &ahcd->ahcd->regs->control); - (void) admhc_readl(ahcd, &ahcd->regs->control); - - /* no resumes until devices finish suspending */ - if (!autostop) { - ahcd->next_statechange = jiffies + msecs_to_jiffies (5); - ahcd->autostop = 0; - } - -done: - return status; -} - -static inline struct ed *find_head(struct ed *ed) -{ - /* for bulk and control lists */ - while (ed->ed_prev) - ed = ed->ed_prev; - return ed; -} - -/* caller has locked the root hub */ -static int admhc_rh_resume(struct admhcd *ahcd) -__releases(ahcd->lock) -__acquires(ahcd->lock) -{ - struct usb_hcd *hcd = admhcd_to_hcd (ahcd); - u32 temp, enables; - int status = -EINPROGRESS; - int autostopped = ahcd->autostop; - - ahcd->autostop = 0; - ahcd->hc_control = admhc_readl(ahcd, &ahcd->regs->control); - - if (ahcd->hc_control & (OHCI_CTRL_IR | OHCI_SCHED_ENABLES)) { - /* this can happen after resuming a swsusp snapshot */ - if (hcd->state == HC_STATE_RESUMING) { - admhc_dbg(ahcd, "BIOS/SMM active, control %03x\n", - ahcd->hc_control); - status = -EBUSY; - /* this happens when pmcore resumes HC then root */ - } else { - admhc_dbg(ahcd, "duplicate resume\n"); - status = 0; - } - } else switch (ahcd->hc_control & OHCI_CTRL_HCFS) { - case OHCI_USB_SUSPEND: - ahcd->hc_control &= ~(OHCI_CTRL_HCFS|OHCI_SCHED_ENABLES); - ahcd->hc_control |= OHCI_USB_RESUME; - admhc_writel(ahcd, ahcd->hc_control, &ahcd->ahcd->regs->control); - (void) admhc_readl(ahcd, &ahcd->regs->control); - admhc_dbg(ahcd, "%s root hub\n", - autostopped ? "auto-start" : "resume"); - break; - case OHCI_USB_RESUME: - /* HCFS changes sometime after INTR_RD */ - admhc_dbg(ahcd, "%swakeup root hub\n", - autostopped ? "auto-" : ""); - break; - case OHCI_USB_OPER: - /* this can happen after resuming a swsusp snapshot */ - admhc_dbg(ahcd, "snapshot resume? reinit\n"); - status = -EBUSY; - break; - default: /* RESET, we lost power */ - admhc_dbg(ahcd, "lost power\n"); - status = -EBUSY; - } - if (status == -EBUSY) { - if (!autostopped) { - spin_unlock_irq (&ahcd->lock); - (void) ahcd_init (ahcd); - status = admhc_restart (ahcd); - spin_lock_irq (&ahcd->lock); - } - return status; - } - if (status != -EINPROGRESS) - return status; - if (autostopped) - goto skip_resume; - spin_unlock_irq (&ahcd->lock); - - /* Some controllers (lucent erratum) need extra-long delays */ - msleep (20 /* usb 11.5.1.10 */ + 12 /* 32 msec counter */ + 1); - - temp = admhc_readl(ahcd, &ahcd->regs->control); - temp &= OHCI_CTRL_HCFS; - if (temp != OHCI_USB_RESUME) { - admhc_err (ahcd, "controller won't resume\n"); - spin_lock_irq(&ahcd->lock); - return -EBUSY; - } - - /* disable old schedule state, reinit from scratch */ - admhc_writel(ahcd, 0, &ahcd->regs->ed_controlhead); - admhc_writel(ahcd, 0, &ahcd->regs->ed_controlcurrent); - admhc_writel(ahcd, 0, &ahcd->regs->ed_bulkhead); - admhc_writel(ahcd, 0, &ahcd->regs->ed_bulkcurrent); - admhc_writel(ahcd, 0, &ahcd->regs->ed_periodcurrent); - admhc_writel(ahcd, (u32) ahcd->hcca_dma, &ahcd->ahcd->regs->hcca); - - /* Sometimes PCI D3 suspend trashes frame timings ... */ - periodic_reinit(ahcd); - - /* the following code is executed with ahcd->lock held and - * irqs disabled if and only if autostopped is true - */ - -skip_resume: - /* interrupts might have been disabled */ - admhc_writel(ahcd, OHCI_INTR_INIT, &ahcd->regs->int_enable); - if (ahcd->ed_rm_list) - admhc_writel(ahcd, OHCI_INTR_SF, &ahcd->regs->int_enable); - - /* Then re-enable operations */ - admhc_writel(ahcd, OHCI_USB_OPER, &ahcd->regs->control); - (void) admhc_readl(ahcd, &ahcd->regs->control); - if (!autostopped) - msleep (3); - - temp = ahcd->hc_control; - temp &= OHCI_CTRL_RWC; - temp |= OHCI_CONTROL_INIT | OHCI_USB_OPER; - ahcd->hc_control = temp; - admhc_writel(ahcd, temp, &ahcd->regs->control); - (void) admhc_readl(ahcd, &ahcd->regs->control); - - /* TRSMRCY */ - if (!autostopped) { - msleep (10); - spin_lock_irq (&ahcd->lock); - } - /* now ahcd->lock is always held and irqs are always disabled */ - - /* keep it alive for more than ~5x suspend + resume costs */ - ahcd->next_statechange = jiffies + STATECHANGE_DELAY; - - /* maybe turn schedules back on */ - enables = 0; - temp = 0; - if (!ahcd->ed_rm_list) { - if (ahcd->ed_controltail) { - admhc_writel(ahcd, - find_head (ahcd->ed_controltail)->dma, - &ahcd->regs->ed_controlhead); - enables |= OHCI_CTRL_CLE; - temp |= OHCI_CLF; - } - if (ahcd->ed_bulktail) { - admhc_writel(ahcd, find_head (ahcd->ed_bulktail)->dma, - &ahcd->regs->ed_bulkhead); - enables |= OHCI_CTRL_BLE; - temp |= OHCI_BLF; - } - } - if (hcd->self.bandwidth_isoc_reqs || hcd->self.bandwidth_int_reqs) - enables |= OHCI_CTRL_PLE|OHCI_CTRL_IE; - if (enables) { - admhc_dbg(ahcd, "restarting schedules ... %08x\n", enables); - ahcd->hc_control |= enables; - admhc_writel(ahcd, ahcd->hc_control, &ahcd->ahcd->regs->control); - if (temp) - admhc_writel(ahcd, temp, &ahcd->regs->cmdstatus); - (void) admhc_readl(ahcd, &ahcd->regs->control); - } - - return 0; -} - -static int admhc_bus_suspend(struct usb_hcd *hcd) -{ - struct admhcd *ahcd = hcd_to_admhcd(hcd); - int rc; - - spin_lock_irq(&ahcd->lock); - - if (unlikely(!test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags))) - rc = -ESHUTDOWN; - else - rc = admhc_rh_suspend (ahcd, 0); - spin_unlock_irq(&ahcd->lock); - return rc; -} - -static int admhc_bus_resume(struct usb_hcd *hcd) -{ - struct admhcd *ahcd = hcd_to_admhcd(hcd); - int rc; - - if (time_before(jiffies, ahcd->next_statechange)) - msleep(5); - - spin_lock_irq (&ahcd->lock); - - if (unlikely(!test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags))) - rc = -ESHUTDOWN; - else - rc = admhc_rh_resume (ahcd); - spin_unlock_irq(&ahcd->lock); - - /* poll until we know a device is connected or we autostop */ - if (rc == 0) - usb_hcd_poll_rh_status(hcd); - return rc; -} - -/* Carry out polling-, autostop-, and autoresume-related state changes */ -static int admhc_root_hub_state_changes(struct admhcd *ahcd, int changed, - int any_connected) -{ - int poll_rh = 1; - - switch (ahcd->hc_control & OHCI_CTRL_HCFS) { - - case OHCI_USB_OPER: - /* keep on polling until we know a device is connected - * and RHSC is enabled */ - if (!ahcd->autostop) { - if (any_connected || - !device_may_wakeup(&admhcd_to_hcd(ahcd) - ->self.root_hub->dev)) { - if (admhc_readl(ahcd, &ahcd->regs->int_enable) & - OHCI_INTR_RHSC) - poll_rh = 0; - } else { - ahcd->autostop = 1; - ahcd->next_statechange = jiffies + HZ; - } - - /* if no devices have been attached for one second, autostop */ - } else { - if (changed || any_connected) { - ahcd->autostop = 0; - ahcd->next_statechange = jiffies + - STATECHANGE_DELAY; - } else if (time_after_eq(jiffies, - ahcd->next_statechange) - && !ahcd->ed_rm_list - && !(ahcd->hc_control & - OHCI_SCHED_ENABLES)) { - ahcd_rh_suspend(ahcd, 1); - } - } - break; - - /* if there is a port change, autostart or ask to be resumed */ - case OHCI_USB_SUSPEND: - case OHCI_USB_RESUME: - if (changed) { - if (ahcd->autostop) - admhc_rh_resume(ahcd); - else - usb_hcd_resume_root_hub(admhcd_to_hcd(ahcd)); - } else { - /* everything is idle, no need for polling */ - poll_rh = 0; - } - break; - } - return poll_rh; -} - -#else /* CONFIG_PM */ - -static inline int admhc_rh_resume(struct admhcd *ahcd) -{ - return 0; -} - -/* Carry out polling-related state changes. - * autostop isn't used when CONFIG_PM is turned off. - */ -static int admhc_root_hub_state_changes(struct admhcd *ahcd, int changed, - int any_connected) -{ - int poll_rh = 1; - - /* keep on polling until RHSC is enabled */ - if (admhc_readl(ahcd, &ahcd->regs->int_enable) & ADMHC_INTR_INSM) - poll_rh = 0; - - return poll_rh; -} - -#endif /* CONFIG_PM */ - /*-------------------------------------------------------------------------*/ /* build "status change" packet (one or two bytes) from HC registers */ @@ -647,7 +293,7 @@ static int admhc_hub_control ( struct admhcd *ahcd = hcd_to_admhcd(hcd); int ports = hcd_to_bus (hcd)->root_hub->maxchild; u32 temp; - int retval = 0; + int ret = 0; if (unlikely(!test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags))) return -ESHUTDOWN; @@ -753,7 +399,7 @@ static int admhc_hub_control ( &ahcd->regs->portstatus[wIndex]); break; case USB_PORT_FEAT_RESET: - retval = root_port_reset(ahcd, wIndex); + ret = root_port_reset(ahcd, wIndex); break; default: goto error; @@ -763,8 +409,8 @@ static int admhc_hub_control ( default: error: /* "protocol stall" on error */ - retval = -EPIPE; + ret = -EPIPE; } - return retval; + return ret; } |