mirror of
git://projects.qi-hardware.com/openwrt-xburst.git
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[adm5120] checkin a new, experimental USB driver
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@8905 3c298f89-4303-0410-b956-a3cf2f4a3e73
This commit is contained in:
juhosg
770
target/linux/adm5120/files/drivers/usb/host/adm5120-hub.c
Normal file
770
target/linux/adm5120/files/drivers/usb/host/adm5120-hub.c
Normal file
@@ -0,0 +1,770 @@
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/*
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* OHCI HCD (Host Controller Driver) for USB.
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*
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* (C) Copyright 1999 Roman Weissgaerber <weissg@vienna.at>
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* (C) Copyright 2000-2004 David Brownell <dbrownell@users.sourceforge.net>
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*
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* This file is licenced under GPL
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*/
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/*-------------------------------------------------------------------------*/
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/*
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* OHCI Root Hub ... the nonsharable stuff
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*/
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#define dbg_port(hc,label,num,value) \
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admhc_dbg(hc, \
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"%s port%d " \
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"= 0x%08x%s%s%s%s%s%s%s%s%s%s%s%s\n", \
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label, num, temp, \
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(temp & ADMHC_PS_PRSC) ? " PRSC" : "", \
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(temp & ADMHC_PS_OCIC) ? " OCIC" : "", \
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(temp & ADMHC_PS_PSSC) ? " PSSC" : "", \
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(temp & ADMHC_PS_PESC) ? " PESC" : "", \
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(temp & ADMHC_PS_CSC) ? " CSC" : "", \
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\
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(temp & ADMHC_PS_LSDA) ? " LSDA" : "", \
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(temp & ADMHC_PS_PPS) ? " PPS" : "", \
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(temp & ADMHC_PS_PRS) ? " PRS" : "", \
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(temp & ADMHC_PS_POCI) ? " POCI" : "", \
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(temp & ADMHC_PS_PSS) ? " PSS" : "", \
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\
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(temp & ADMHC_PS_PES) ? " PES" : "", \
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(temp & ADMHC_PS_CCS) ? " CCS" : "" \
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);
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#define dbg_port_write(hc,label,num,value) \
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admhc_dbg(hc, \
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"%s port%d " \
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"= 0x%08x%s%s%s%s%s%s%s%s%s%s%s%s\n", \
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label, num, temp, \
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(temp & ADMHC_PS_PRSC) ? " PRSC" : "", \
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(temp & ADMHC_PS_OCIC) ? " OCIC" : "", \
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(temp & ADMHC_PS_PSSC) ? " PSSC" : "", \
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(temp & ADMHC_PS_PESC) ? " PESC" : "", \
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(temp & ADMHC_PS_CSC) ? " CSC" : "", \
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\
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(temp & ADMHC_PS_CPP) ? " CPP" : "", \
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(temp & ADMHC_PS_SPP) ? " SPP" : "", \
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(temp & ADMHC_PS_SPR) ? " SPR" : "", \
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(temp & ADMHC_PS_CPS) ? " CPS" : "", \
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(temp & ADMHC_PS_SPS) ? " SPS" : "", \
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\
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(temp & ADMHC_PS_SPE) ? " SPE" : "", \
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(temp & ADMHC_PS_CPE) ? " CPE" : "" \
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);
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/*-------------------------------------------------------------------------*/
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/* hcd->hub_irq_enable() */
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static void admhc_rhsc_enable(struct usb_hcd *hcd)
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{
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struct admhcd *ahcd = hcd_to_admhcd(hcd);
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spin_lock_irq(&ahcd->lock);
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if (!ahcd->autostop)
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del_timer(&hcd->rh_timer); /* Prevent next poll */
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admhc_intr_enable(ahcd, ADMHC_INTR_INSM);
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spin_unlock_irq(&ahcd->lock);
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}
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#define OHCI_SCHED_ENABLES \
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(OHCI_CTRL_CLE|OHCI_CTRL_BLE|OHCI_CTRL_PLE|OHCI_CTRL_IE)
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#ifdef CONFIG_PM
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static int admhc_restart(struct admhcd *ahcd);
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static int admhc_rh_suspend(struct admhcd *ahcd, int autostop)
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__releases(ahcd->lock)
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__acquires(ahcd->lock)
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{
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int status = 0;
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ahcd->hc_control = admhc_readl(ahcd, &ahcd->regs->control);
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switch (ahcd->hc_control & OHCI_CTRL_HCFS) {
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case OHCI_USB_RESUME:
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admhc_dbg(ahcd, "resume/suspend?\n");
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ahcd->hc_control &= ~OHCI_CTRL_HCFS;
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ahcd->hc_control |= OHCI_USB_RESET;
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admhc_writel(ahcd, ahcd->hc_control, &ahcd->ahcd->regs->control);
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(void) admhc_readl(ahcd, &ahcd->regs->control);
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/* FALL THROUGH */
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case OHCI_USB_RESET:
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status = -EBUSY;
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admhc_dbg(ahcd, "needs reinit!\n");
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goto done;
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case OHCI_USB_SUSPEND:
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if (!ahcd->autostop) {
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admhc_dbg(ahcd, "already suspended\n");
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goto done;
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}
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}
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admhc_dbg(ahcd, "%s root hub\n",
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autostop ? "auto-stop" : "suspend");
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/* First stop any processing */
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if (!autostop && (ahcd->hc_control & OHCI_SCHED_ENABLES)) {
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ahcd->hc_control &= ~OHCI_SCHED_ENABLES;
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admhc_writel(ahcd, ahcd->hc_control, &ahcd->ahcd->regs->control);
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ahcd->hc_control = admhc_readl(ahcd, &ahcd->regs->control);
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admhc_writel(ahcd, OHCI_INTR_SF, &ahcd->regs->intrstatus);
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/* sched disables take effect on the next frame,
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* then the last WDH could take 6+ msec
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*/
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admhc_dbg(ahcd, "stopping schedules ...\n");
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ahcd->autostop = 0;
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spin_unlock_irq (&ahcd->lock);
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msleep (8);
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spin_lock_irq (&ahcd->lock);
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}
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dl_done_list (ahcd);
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finish_unlinks (ahcd, admhc_frame_no(ahcd));
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/* maybe resume can wake root hub */
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if (device_may_wakeup(&admhcd_to_hcd(ahcd)->self.root_hub->dev) ||
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autostop)
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ahcd->hc_control |= OHCI_CTRL_RWE;
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else {
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admhc_writel(ahcd, OHCI_INTR_RHSC, &ahcd->regs->intrdisable);
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ahcd->hc_control &= ~OHCI_CTRL_RWE;
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}
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/* Suspend hub ... this is the "global (to this bus) suspend" mode,
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* which doesn't imply ports will first be individually suspended.
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*/
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ahcd->hc_control &= ~OHCI_CTRL_HCFS;
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ahcd->hc_control |= OHCI_USB_SUSPEND;
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admhc_writel(ahcd, ahcd->hc_control, &ahcd->ahcd->regs->control);
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(void) admhc_readl(ahcd, &ahcd->regs->control);
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/* no resumes until devices finish suspending */
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if (!autostop) {
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ahcd->next_statechange = jiffies + msecs_to_jiffies (5);
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ahcd->autostop = 0;
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}
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done:
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return status;
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}
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static inline struct ed *find_head(struct ed *ed)
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{
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/* for bulk and control lists */
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while (ed->ed_prev)
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ed = ed->ed_prev;
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return ed;
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}
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/* caller has locked the root hub */
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static int admhc_rh_resume(struct admhcd *ahcd)
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__releases(ahcd->lock)
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__acquires(ahcd->lock)
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{
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struct usb_hcd *hcd = admhcd_to_hcd (ahcd);
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u32 temp, enables;
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int status = -EINPROGRESS;
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int autostopped = ahcd->autostop;
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ahcd->autostop = 0;
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ahcd->hc_control = admhc_readl(ahcd, &ahcd->regs->control);
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if (ahcd->hc_control & (OHCI_CTRL_IR | OHCI_SCHED_ENABLES)) {
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/* this can happen after resuming a swsusp snapshot */
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if (hcd->state == HC_STATE_RESUMING) {
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admhc_dbg(ahcd, "BIOS/SMM active, control %03x\n",
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ahcd->hc_control);
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status = -EBUSY;
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/* this happens when pmcore resumes HC then root */
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} else {
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admhc_dbg(ahcd, "duplicate resume\n");
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status = 0;
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}
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} else switch (ahcd->hc_control & OHCI_CTRL_HCFS) {
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case OHCI_USB_SUSPEND:
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ahcd->hc_control &= ~(OHCI_CTRL_HCFS|OHCI_SCHED_ENABLES);
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ahcd->hc_control |= OHCI_USB_RESUME;
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admhc_writel(ahcd, ahcd->hc_control, &ahcd->ahcd->regs->control);
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(void) admhc_readl(ahcd, &ahcd->regs->control);
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admhc_dbg(ahcd, "%s root hub\n",
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autostopped ? "auto-start" : "resume");
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break;
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case OHCI_USB_RESUME:
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/* HCFS changes sometime after INTR_RD */
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admhc_dbg(ahcd, "%swakeup root hub\n",
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autostopped ? "auto-" : "");
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break;
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case OHCI_USB_OPER:
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/* this can happen after resuming a swsusp snapshot */
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admhc_dbg(ahcd, "snapshot resume? reinit\n");
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status = -EBUSY;
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break;
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default: /* RESET, we lost power */
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admhc_dbg(ahcd, "lost power\n");
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status = -EBUSY;
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}
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if (status == -EBUSY) {
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if (!autostopped) {
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spin_unlock_irq (&ahcd->lock);
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(void) ahcd_init (ahcd);
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status = admhc_restart (ahcd);
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spin_lock_irq (&ahcd->lock);
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}
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return status;
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}
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if (status != -EINPROGRESS)
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return status;
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if (autostopped)
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goto skip_resume;
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spin_unlock_irq (&ahcd->lock);
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/* Some controllers (lucent erratum) need extra-long delays */
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msleep (20 /* usb 11.5.1.10 */ + 12 /* 32 msec counter */ + 1);
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temp = admhc_readl(ahcd, &ahcd->regs->control);
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temp &= OHCI_CTRL_HCFS;
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if (temp != OHCI_USB_RESUME) {
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admhc_err (ahcd, "controller won't resume\n");
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spin_lock_irq(&ahcd->lock);
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return -EBUSY;
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}
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/* disable old schedule state, reinit from scratch */
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admhc_writel(ahcd, 0, &ahcd->regs->ed_controlhead);
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admhc_writel(ahcd, 0, &ahcd->regs->ed_controlcurrent);
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admhc_writel(ahcd, 0, &ahcd->regs->ed_bulkhead);
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admhc_writel(ahcd, 0, &ahcd->regs->ed_bulkcurrent);
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admhc_writel(ahcd, 0, &ahcd->regs->ed_periodcurrent);
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admhc_writel(ahcd, (u32) ahcd->hcca_dma, &ahcd->ahcd->regs->hcca);
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/* Sometimes PCI D3 suspend trashes frame timings ... */
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periodic_reinit(ahcd);
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/* the following code is executed with ahcd->lock held and
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* irqs disabled if and only if autostopped is true
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*/
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skip_resume:
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/* interrupts might have been disabled */
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admhc_writel(ahcd, OHCI_INTR_INIT, &ahcd->regs->int_enable);
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if (ahcd->ed_rm_list)
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admhc_writel(ahcd, OHCI_INTR_SF, &ahcd->regs->int_enable);
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/* Then re-enable operations */
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admhc_writel(ahcd, OHCI_USB_OPER, &ahcd->regs->control);
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(void) admhc_readl(ahcd, &ahcd->regs->control);
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if (!autostopped)
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msleep (3);
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temp = ahcd->hc_control;
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temp &= OHCI_CTRL_RWC;
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temp |= OHCI_CONTROL_INIT | OHCI_USB_OPER;
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ahcd->hc_control = temp;
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admhc_writel(ahcd, temp, &ahcd->regs->control);
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(void) admhc_readl(ahcd, &ahcd->regs->control);
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/* TRSMRCY */
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if (!autostopped) {
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msleep (10);
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spin_lock_irq (&ahcd->lock);
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}
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/* now ahcd->lock is always held and irqs are always disabled */
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/* keep it alive for more than ~5x suspend + resume costs */
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ahcd->next_statechange = jiffies + STATECHANGE_DELAY;
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/* maybe turn schedules back on */
|
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enables = 0;
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temp = 0;
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if (!ahcd->ed_rm_list) {
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||||
if (ahcd->ed_controltail) {
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||||
admhc_writel(ahcd,
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||||
find_head (ahcd->ed_controltail)->dma,
|
||||
&ahcd->regs->ed_controlhead);
|
||||
enables |= OHCI_CTRL_CLE;
|
||||
temp |= OHCI_CLF;
|
||||
}
|
||||
if (ahcd->ed_bulktail) {
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admhc_writel(ahcd, find_head (ahcd->ed_bulktail)->dma,
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||||
&ahcd->regs->ed_bulkhead);
|
||||
enables |= OHCI_CTRL_BLE;
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||||
temp |= OHCI_BLF;
|
||||
}
|
||||
}
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||||
if (hcd->self.bandwidth_isoc_reqs || hcd->self.bandwidth_int_reqs)
|
||||
enables |= OHCI_CTRL_PLE|OHCI_CTRL_IE;
|
||||
if (enables) {
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||||
admhc_dbg(ahcd, "restarting schedules ... %08x\n", enables);
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||||
ahcd->hc_control |= enables;
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||||
admhc_writel(ahcd, ahcd->hc_control, &ahcd->ahcd->regs->control);
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||||
if (temp)
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||||
admhc_writel(ahcd, temp, &ahcd->regs->cmdstatus);
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(void) admhc_readl(ahcd, &ahcd->regs->control);
|
||||
}
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||||
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||||
return 0;
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||||
}
|
||||
|
||||
static int admhc_bus_suspend(struct usb_hcd *hcd)
|
||||
{
|
||||
struct admhcd *ahcd = hcd_to_admhcd(hcd);
|
||||
int rc;
|
||||
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||||
spin_lock_irq(&ahcd->lock);
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||||
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||||
if (unlikely(!test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags)))
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rc = -ESHUTDOWN;
|
||||
else
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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))
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||||
msleep(5);
|
||||
|
||||
spin_lock_irq (&ahcd->lock);
|
||||
|
||||
if (unlikely(!test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags)))
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||||
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 */
|
||||
|
||||
static int
|
||||
admhc_hub_status_data(struct usb_hcd *hcd, char *buf)
|
||||
{
|
||||
struct admhcd *ahcd = hcd_to_admhcd(hcd);
|
||||
int i, changed = 0, length = 1;
|
||||
int any_connected = 0;
|
||||
unsigned long flags;
|
||||
u32 status;
|
||||
|
||||
spin_lock_irqsave(&ahcd->lock, flags);
|
||||
if (!test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags))
|
||||
goto done;
|
||||
|
||||
/* init status */
|
||||
status = admhc_get_rhdesc(ahcd);
|
||||
if (status & (ADMHC_RH_LPSC | ADMHC_RH_OCIC))
|
||||
buf [0] = changed = 1;
|
||||
else
|
||||
buf [0] = 0;
|
||||
if (ahcd->num_ports > 7) {
|
||||
buf [1] = 0;
|
||||
length++;
|
||||
}
|
||||
|
||||
/* look at each port */
|
||||
for (i = 0; i < ahcd->num_ports; i++) {
|
||||
status = admhc_get_portstatus(ahcd, i);
|
||||
|
||||
/* can't autostop if ports are connected */
|
||||
any_connected |= (status & ADMHC_PS_CCS);
|
||||
|
||||
if (status & (ADMHC_PS_CSC | ADMHC_PS_PESC | ADMHC_PS_PSSC
|
||||
| ADMHC_PS_OCIC | ADMHC_PS_PRSC)) {
|
||||
changed = 1;
|
||||
if (i < 7)
|
||||
buf [0] |= 1 << (i + 1);
|
||||
else
|
||||
buf [1] |= 1 << (i - 7);
|
||||
}
|
||||
}
|
||||
|
||||
hcd->poll_rh = admhc_root_hub_state_changes(ahcd, changed,
|
||||
any_connected);
|
||||
|
||||
done:
|
||||
spin_unlock_irqrestore(&ahcd->lock, flags);
|
||||
|
||||
return changed ? length : 0;
|
||||
}
|
||||
|
||||
/*-------------------------------------------------------------------------*/
|
||||
|
||||
static void admhc_hub_descriptor(struct admhcd *ahcd,
|
||||
struct usb_hub_descriptor *desc)
|
||||
{
|
||||
u32 rh = admhc_get_rhdesc(ahcd);
|
||||
u16 temp;
|
||||
|
||||
desc->bDescriptorType = USB_DT_HUB; /* Hub-descriptor */
|
||||
desc->bPwrOn2PwrGood = ADMHC_POTPGT/2; /* use default value */
|
||||
desc->bHubContrCurrent = 0x00; /* 0mA */
|
||||
|
||||
desc->bNbrPorts = ahcd->num_ports;
|
||||
temp = 1 + (ahcd->num_ports / 8);
|
||||
desc->bDescLength = USB_DT_HUB_NONVAR_SIZE + 2 * temp;
|
||||
|
||||
/* FIXME */
|
||||
temp = 0;
|
||||
if (rh & ADMHC_RH_NPS) /* no power switching? */
|
||||
temp |= 0x0002;
|
||||
if (rh & ADMHC_RH_PSM) /* per-port power switching? */
|
||||
temp |= 0x0001;
|
||||
if (rh & ADMHC_RH_NOCP) /* no overcurrent reporting? */
|
||||
temp |= 0x0010;
|
||||
else if (rh & ADMHC_RH_OCPM) /* per-port overcurrent reporting? */
|
||||
temp |= 0x0008;
|
||||
desc->wHubCharacteristics = (__force __u16)cpu_to_hc16(ahcd, temp);
|
||||
|
||||
/* two bitmaps: ports removable, and usb 1.0 legacy PortPwrCtrlMask */
|
||||
desc->bitmap [0] = 0;
|
||||
desc->bitmap [0] = ~0;
|
||||
}
|
||||
|
||||
/*-------------------------------------------------------------------------*/
|
||||
|
||||
#ifdef CONFIG_USB_OTG
|
||||
|
||||
static int admhc_start_port_reset(struct usb_hcd *hcd, unsigned port)
|
||||
{
|
||||
struct admhcd *ahcd = hcd_to_admhcd(hcd);
|
||||
u32 status;
|
||||
|
||||
if (!port)
|
||||
return -EINVAL;
|
||||
port--;
|
||||
|
||||
/* start port reset before HNP protocol times out */
|
||||
status = admhc_readl(ahcd, &ahcd->regs->portstatus[port]);
|
||||
if (!(status & ADMHC_PS_CCS))
|
||||
return -ENODEV;
|
||||
|
||||
/* khubd will finish the reset later */
|
||||
admhc_writel(ahcd, ADMHC_PS_PRS, &ahcd->regs->portstatus[port]);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void start_hnp(struct admhcd *ahcd);
|
||||
|
||||
#else
|
||||
|
||||
#define admhc_start_port_reset NULL
|
||||
|
||||
#endif
|
||||
|
||||
/*-------------------------------------------------------------------------*/
|
||||
|
||||
|
||||
/* See usb 7.1.7.5: root hubs must issue at least 50 msec reset signaling,
|
||||
* not necessarily continuous ... to guard against resume signaling.
|
||||
* The short timeout is safe for non-root hubs, and is backward-compatible
|
||||
* with earlier Linux hosts.
|
||||
*/
|
||||
#ifdef CONFIG_USB_SUSPEND
|
||||
#define PORT_RESET_MSEC 50
|
||||
#else
|
||||
#define PORT_RESET_MSEC 10
|
||||
#endif
|
||||
|
||||
/* this timer value might be vendor-specific ... */
|
||||
#define PORT_RESET_HW_MSEC 10
|
||||
|
||||
/* wrap-aware logic morphed from <linux/jiffies.h> */
|
||||
#define tick_before(t1,t2) ((s16)(((s16)(t1))-((s16)(t2))) < 0)
|
||||
|
||||
/* called from some task, normally khubd */
|
||||
static inline int root_port_reset(struct admhcd *ahcd, unsigned port)
|
||||
{
|
||||
#if 0
|
||||
/* FIXME: revert to this when frame numbers are updated */
|
||||
__hc32 __iomem *portstat = &ahcd->regs->portstatus[port];
|
||||
u32 temp;
|
||||
u16 now = admhc_readl(ahcd, &ahcd->regs->fmnumber);
|
||||
u16 reset_done = now + PORT_RESET_MSEC;
|
||||
|
||||
/* build a "continuous enough" reset signal, with up to
|
||||
* 3msec gap between pulses. scheduler HZ==100 must work;
|
||||
* this might need to be deadline-scheduled.
|
||||
*/
|
||||
do {
|
||||
/* spin until any current reset finishes */
|
||||
for (;;) {
|
||||
temp = admhc_readl(ahcd, portstat);
|
||||
/* handle e.g. CardBus eject */
|
||||
if (temp == ~(u32)0)
|
||||
return -ESHUTDOWN;
|
||||
if (!(temp & ADMHC_PS_PRS))
|
||||
break;
|
||||
udelay (500);
|
||||
}
|
||||
|
||||
if (!(temp & ADMHC_PS_CCS))
|
||||
break;
|
||||
if (temp & ADMHC_PS_PRSC)
|
||||
admhc_writel(ahcd, ADMHC_PS_PRSC, portstat);
|
||||
|
||||
/* start the next reset, sleep till it's probably done */
|
||||
admhc_writel(ahcd, ADMHC_PS_PRS, portstat);
|
||||
msleep(PORT_RESET_HW_MSEC);
|
||||
now = admhc_readl(ahcd, &ahcd->regs->fmnumber);
|
||||
} while (tick_before(now, reset_done));
|
||||
/* caller synchronizes using PRSC */
|
||||
#else
|
||||
__hc32 __iomem *portstat = &ahcd->regs->portstatus[port];
|
||||
u32 temp;
|
||||
unsigned long reset_done = jiffies + msecs_to_jiffies(PORT_RESET_MSEC);
|
||||
|
||||
/* build a "continuous enough" reset signal, with up to
|
||||
* 3msec gap between pulses. scheduler HZ==100 must work;
|
||||
* this might need to be deadline-scheduled.
|
||||
*/
|
||||
do {
|
||||
/* spin until any current reset finishes */
|
||||
for (;;) {
|
||||
temp = admhc_readl(ahcd, portstat);
|
||||
/* handle e.g. CardBus eject */
|
||||
if (temp == ~(u32)0)
|
||||
return -ESHUTDOWN;
|
||||
if (!(temp & ADMHC_PS_PRS))
|
||||
break;
|
||||
udelay (500);
|
||||
}
|
||||
|
||||
if (!(temp & ADMHC_PS_CCS))
|
||||
break;
|
||||
|
||||
if (temp & ADMHC_PS_PRSC)
|
||||
admhc_writel(ahcd, ADMHC_PS_PRSC, portstat);
|
||||
|
||||
/* start the next reset, sleep till it's probably done */
|
||||
admhc_writel(ahcd, ADMHC_PS_PRS, portstat);
|
||||
msleep(PORT_RESET_HW_MSEC);
|
||||
} while (time_before(jiffies, reset_done));
|
||||
|
||||
admhc_writel(ahcd, ADMHC_PS_SPE | ADMHC_PS_CSC, portstat);
|
||||
msleep(100);
|
||||
#endif
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int admhc_hub_control (
|
||||
struct usb_hcd *hcd,
|
||||
u16 typeReq,
|
||||
u16 wValue,
|
||||
u16 wIndex,
|
||||
char *buf,
|
||||
u16 wLength
|
||||
) {
|
||||
struct admhcd *ahcd = hcd_to_admhcd(hcd);
|
||||
int ports = hcd_to_bus (hcd)->root_hub->maxchild;
|
||||
u32 temp;
|
||||
int retval = 0;
|
||||
|
||||
if (unlikely(!test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags)))
|
||||
return -ESHUTDOWN;
|
||||
|
||||
switch (typeReq) {
|
||||
case ClearHubFeature:
|
||||
switch (wValue) {
|
||||
case C_HUB_OVER_CURRENT:
|
||||
#if 0 /* FIXME */
|
||||
admhc_writel(ahcd, ADMHC_RH_OCIC,
|
||||
&ahcd->regs->roothub.status);
|
||||
#endif
|
||||
case C_HUB_LOCAL_POWER:
|
||||
break;
|
||||
default:
|
||||
goto error;
|
||||
}
|
||||
break;
|
||||
case ClearPortFeature:
|
||||
if (!wIndex || wIndex > ports)
|
||||
goto error;
|
||||
wIndex--;
|
||||
|
||||
switch (wValue) {
|
||||
case USB_PORT_FEAT_ENABLE:
|
||||
temp = ADMHC_PS_CPE;
|
||||
break;
|
||||
case USB_PORT_FEAT_SUSPEND:
|
||||
temp = ADMHC_PS_CPS;
|
||||
break;
|
||||
case USB_PORT_FEAT_POWER:
|
||||
temp = ADMHC_PS_CPP;
|
||||
break;
|
||||
case USB_PORT_FEAT_C_CONNECTION:
|
||||
temp = ADMHC_PS_CSC;
|
||||
break;
|
||||
case USB_PORT_FEAT_C_ENABLE:
|
||||
temp = ADMHC_PS_PESC;
|
||||
break;
|
||||
case USB_PORT_FEAT_C_SUSPEND:
|
||||
temp = ADMHC_PS_PSSC;
|
||||
break;
|
||||
case USB_PORT_FEAT_C_OVER_CURRENT:
|
||||
temp = ADMHC_PS_OCIC;
|
||||
break;
|
||||
case USB_PORT_FEAT_C_RESET:
|
||||
temp = ADMHC_PS_PRSC;
|
||||
break;
|
||||
default:
|
||||
goto error;
|
||||
}
|
||||
admhc_writel(ahcd, temp, &ahcd->regs->portstatus[wIndex]);
|
||||
break;
|
||||
case GetHubDescriptor:
|
||||
admhc_hub_descriptor(ahcd, (struct usb_hub_descriptor *) buf);
|
||||
break;
|
||||
case GetHubStatus:
|
||||
temp = admhc_get_rhdesc(ahcd);
|
||||
temp &= ~(ADMHC_RH_CRWE | ADMHC_RH_DRWE);
|
||||
put_unaligned(cpu_to_le32 (temp), (__le32 *) buf);
|
||||
break;
|
||||
case GetPortStatus:
|
||||
if (!wIndex || wIndex > ports)
|
||||
goto error;
|
||||
wIndex--;
|
||||
temp = admhc_get_portstatus(ahcd, wIndex);
|
||||
put_unaligned(cpu_to_le32 (temp), (__le32 *) buf);
|
||||
|
||||
dbg_port(ahcd, "GetPortStatus", wIndex, temp);
|
||||
break;
|
||||
case SetHubFeature:
|
||||
switch (wValue) {
|
||||
case C_HUB_OVER_CURRENT:
|
||||
// FIXME: this can be cleared, yes?
|
||||
case C_HUB_LOCAL_POWER:
|
||||
break;
|
||||
default:
|
||||
goto error;
|
||||
}
|
||||
break;
|
||||
case SetPortFeature:
|
||||
if (!wIndex || wIndex > ports)
|
||||
goto error;
|
||||
wIndex--;
|
||||
|
||||
switch (wValue) {
|
||||
case USB_PORT_FEAT_ENABLE:
|
||||
admhc_writel(ahcd, ADMHC_PS_SPE,
|
||||
&ahcd->regs->portstatus[wIndex]);
|
||||
break;
|
||||
case USB_PORT_FEAT_SUSPEND:
|
||||
#ifdef CONFIG_USB_OTG
|
||||
if (hcd->self.otg_port == (wIndex + 1)
|
||||
&& hcd->self.b_hnp_enable)
|
||||
start_hnp(ahcd);
|
||||
else
|
||||
#endif
|
||||
admhc_writel(ahcd, ADMHC_PS_SPS,
|
||||
&ahcd->regs->portstatus[wIndex]);
|
||||
break;
|
||||
case USB_PORT_FEAT_POWER:
|
||||
admhc_writel(ahcd, ADMHC_PS_SPP,
|
||||
&ahcd->regs->portstatus[wIndex]);
|
||||
break;
|
||||
case USB_PORT_FEAT_RESET:
|
||||
retval = root_port_reset(ahcd, wIndex);
|
||||
break;
|
||||
default:
|
||||
goto error;
|
||||
}
|
||||
break;
|
||||
|
||||
default:
|
||||
error:
|
||||
/* "protocol stall" on error */
|
||||
retval = -EPIPE;
|
||||
}
|
||||
return retval;
|
||||
}
|
||||
|
||||
Reference in New Issue
Block a user