diff options
Diffstat (limited to 'drivers/usb/host/ehci-hcd.c')
| -rw-r--r-- | drivers/usb/host/ehci-hcd.c | 113 |
1 files changed, 52 insertions, 61 deletions
diff --git a/drivers/usb/host/ehci-hcd.c b/drivers/usb/host/ehci-hcd.c index 85074cb36f38..369a8a5ea7bb 100644 --- a/drivers/usb/host/ehci-hcd.c +++ b/drivers/usb/host/ehci-hcd.c @@ -57,35 +57,6 @@ * Special thanks to Intel and VIA for providing host controllers to * test this driver on, and Cypress (including In-System Design) for * providing early devices for those host controllers to talk to! - * - * HISTORY: - * - * 2004-05-10 Root hub and PCI suspend/resume support; remote wakeup. (db) - * 2004-02-24 Replace pci_* with generic dma_* API calls (dsaxena@plexity.net) - * 2003-12-29 Rewritten high speed iso transfer support (by Michal Sojka, - * <sojkam@centrum.cz>, updates by DB). - * - * 2002-11-29 Correct handling for hw async_next register. - * 2002-08-06 Handling for bulk and interrupt transfers is mostly shared; - * only scheduling is different, no arbitrary limitations. - * 2002-07-25 Sanity check PCI reads, mostly for better cardbus support, - * clean up HC run state handshaking. - * 2002-05-24 Preliminary FS/LS interrupts, using scheduling shortcuts - * 2002-05-11 Clear TT errors for FS/LS ctrl/bulk. Fill in some other - * missing pieces: enabling 64bit dma, handoff from BIOS/SMM. - * 2002-05-07 Some error path cleanups to report better errors; wmb(); - * use non-CVS version id; better iso bandwidth claim. - * 2002-04-19 Control/bulk/interrupt submit no longer uses giveback() on - * errors in submit path. Bugfixes to interrupt scheduling/processing. - * 2002-03-05 Initial high-speed ISO support; reduce ITD memory; shift - * more checking to generic hcd framework (db). Make it work with - * Philips EHCI; reduce PCI traffic; shorten IRQ path (Rory Bolt). - * 2002-01-14 Minor cleanup; version synch. - * 2002-01-08 Fix roothub handoff of FS/LS to companion controllers. - * 2002-01-04 Control/Bulk queuing behaves. - * - * 2001-12-12 Initial patch version for Linux 2.5.1 kernel. - * 2001-June Works with usb-storage and NEC EHCI on 2.4 */ #define DRIVER_VERSION "10 Dec 2004" @@ -95,7 +66,7 @@ static const char hcd_name [] = "ehci_hcd"; -#undef EHCI_VERBOSE_DEBUG +#undef VERBOSE_DEBUG #undef EHCI_URB_TRACE #ifdef DEBUG @@ -174,6 +145,16 @@ static int handshake (struct ehci_hcd *ehci, void __iomem *ptr, return -ETIMEDOUT; } +static int handshake_on_error_set_halt(struct ehci_hcd *ehci, void __iomem *ptr, + u32 mask, u32 done, int usec) +{ + int error = handshake(ehci, ptr, mask, done, usec); + if (error) + ehci_to_hcd(ehci)->state = HC_STATE_HALT; + + return error; +} + /* force HC to halt state from unknown (EHCI spec section 2.3) */ static int ehci_halt (struct ehci_hcd *ehci) { @@ -246,11 +227,9 @@ static void ehci_quiesce (struct ehci_hcd *ehci) /* wait for any schedule enables/disables to take effect */ temp = ehci_readl(ehci, &ehci->regs->command) << 10; temp &= STS_ASS | STS_PSS; - if (handshake (ehci, &ehci->regs->status, STS_ASS | STS_PSS, - temp, 16 * 125) != 0) { - ehci_to_hcd(ehci)->state = HC_STATE_HALT; + if (handshake_on_error_set_halt(ehci, &ehci->regs->status, + STS_ASS | STS_PSS, temp, 16 * 125)) return; - } /* then disable anything that's still active */ temp = ehci_readl(ehci, &ehci->regs->command); @@ -258,11 +237,8 @@ static void ehci_quiesce (struct ehci_hcd *ehci) ehci_writel(ehci, temp, &ehci->regs->command); /* hardware can take 16 microframes to turn off ... */ - if (handshake (ehci, &ehci->regs->status, STS_ASS | STS_PSS, - 0, 16 * 125) != 0) { - ehci_to_hcd(ehci)->state = HC_STATE_HALT; - return; - } + handshake_on_error_set_halt(ehci, &ehci->regs->status, + STS_ASS | STS_PSS, 0, 16 * 125); } /*-------------------------------------------------------------------------*/ @@ -355,17 +331,13 @@ static void ehci_turn_off_all_ports(struct ehci_hcd *ehci) &ehci->regs->port_status[port]); } -/* ehci_shutdown kick in for silicon on any bus (not just pci, etc). - * This forcibly disables dma and IRQs, helping kexec and other cases - * where the next system software may expect clean state. +/* + * Halt HC, turn off all ports, and let the BIOS use the companion controllers. + * Should be called with ehci->lock held. */ -static void -ehci_shutdown (struct usb_hcd *hcd) +static void ehci_silence_controller(struct ehci_hcd *ehci) { - struct ehci_hcd *ehci; - - ehci = hcd_to_ehci (hcd); - (void) ehci_halt (ehci); + ehci_halt(ehci); ehci_turn_off_all_ports(ehci); /* make BIOS/etc use companion controller during reboot */ @@ -375,6 +347,22 @@ ehci_shutdown (struct usb_hcd *hcd) ehci_readl(ehci, &ehci->regs->configured_flag); } +/* ehci_shutdown kick in for silicon on any bus (not just pci, etc). + * This forcibly disables dma and IRQs, helping kexec and other cases + * where the next system software may expect clean state. + */ +static void ehci_shutdown(struct usb_hcd *hcd) +{ + struct ehci_hcd *ehci = hcd_to_ehci(hcd); + + del_timer_sync(&ehci->watchdog); + del_timer_sync(&ehci->iaa_watchdog); + + spin_lock_irq(&ehci->lock); + ehci_silence_controller(ehci); + spin_unlock_irq(&ehci->lock); +} + static void ehci_port_power (struct ehci_hcd *ehci, int is_on) { unsigned port; @@ -425,15 +413,15 @@ static void ehci_work (struct ehci_hcd *ehci) timer_action (ehci, TIMER_IO_WATCHDOG); } +/* + * Called when the ehci_hcd module is removed. + */ static void ehci_stop (struct usb_hcd *hcd) { struct ehci_hcd *ehci = hcd_to_ehci (hcd); ehci_dbg (ehci, "stop\n"); - /* Turn off port power on all root hub ports. */ - ehci_port_power (ehci, 0); - /* no more interrupts ... */ del_timer_sync (&ehci->watchdog); del_timer_sync(&ehci->iaa_watchdog); @@ -442,13 +430,10 @@ static void ehci_stop (struct usb_hcd *hcd) if (HC_IS_RUNNING (hcd->state)) ehci_quiesce (ehci); + ehci_silence_controller(ehci); ehci_reset (ehci); - ehci_writel(ehci, 0, &ehci->regs->intr_enable); spin_unlock_irq(&ehci->lock); - /* let companion controllers work when we aren't */ - ehci_writel(ehci, 0, &ehci->regs->configured_flag); - remove_companion_file(ehci); remove_debug_files (ehci); @@ -676,7 +661,7 @@ static irqreturn_t ehci_irq (struct usb_hcd *hcd) cmd = ehci_readl(ehci, &ehci->regs->command); bh = 0; -#ifdef EHCI_VERBOSE_DEBUG +#ifdef VERBOSE_DEBUG /* unrequested/ignored: Frame List Rollover */ dbg_status (ehci, "irq", status); #endif @@ -710,6 +695,8 @@ static irqreturn_t ehci_irq (struct usb_hcd *hcd) /* remote wakeup [4.3.1] */ if (status & STS_PCD) { unsigned i = HCS_N_PORTS (ehci->hcs_params); + + /* kick root hub later */ pcd_status = status; /* resume root hub? */ @@ -738,8 +725,6 @@ static irqreturn_t ehci_irq (struct usb_hcd *hcd) /* PCI errors [4.15.2.4] */ if (unlikely ((status & STS_FATAL) != 0)) { - /* bogus "fatal" IRQs appear on some chips... why? */ - status = ehci_readl(ehci, &ehci->regs->status); dbg_cmd (ehci, "fatal", ehci_readl(ehci, &ehci->regs->command)); dbg_status (ehci, "fatal", status); @@ -758,7 +743,7 @@ dead: if (bh) ehci_work (ehci); spin_unlock (&ehci->lock); - if (pcd_status & STS_PCD) + if (pcd_status) usb_hcd_poll_rh_status(hcd); return IRQ_HANDLED; } @@ -788,8 +773,14 @@ static int ehci_urb_enqueue ( INIT_LIST_HEAD (&qtd_list); switch (usb_pipetype (urb->pipe)) { - // case PIPE_CONTROL: - // case PIPE_BULK: + case PIPE_CONTROL: + /* qh_completions() code doesn't handle all the fault cases + * in multi-TD control transfers. Even 1KB is rare anyway. + */ + if (urb->transfer_buffer_length > (16 * 1024)) + return -EMSGSIZE; + /* FALLTHROUGH */ + /* case PIPE_BULK: */ default: if (!qh_urb_transaction (ehci, urb, &qtd_list, mem_flags)) return -ENOMEM; |