diff options
Diffstat (limited to 'drivers/usb/host/ehci-hcd.c')
| -rw-r--r-- | drivers/usb/host/ehci-hcd.c | 1335 |
1 files changed, 920 insertions, 415 deletions
diff --git a/drivers/usb/host/ehci-hcd.c b/drivers/usb/host/ehci-hcd.c index af3c05eb86f..81cda09b47e 100644 --- a/drivers/usb/host/ehci-hcd.c +++ b/drivers/usb/host/ehci-hcd.c @@ -1,6 +1,10 @@ /* + * Enhanced Host Controller Interface (EHCI) driver for USB. + * + * Maintainer: Alan Stern <stern@rowland.harvard.edu> + * * Copyright (c) 2000-2004 by David Brownell - * + * * This program is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License as published by the * Free Software Foundation; either version 2 of the License, or (at your @@ -16,14 +20,6 @@ * Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ -#include <linux/config.h> - -#ifdef CONFIG_USB_DEBUG - #define DEBUG -#else - #undef DEBUG -#endif - #include <linux/module.h> #include <linux/pci.h> #include <linux/dmapool.h> @@ -31,26 +27,27 @@ #include <linux/delay.h> #include <linux/ioport.h> #include <linux/sched.h> -#include <linux/slab.h> -#include <linux/smp_lock.h> +#include <linux/vmalloc.h> #include <linux/errno.h> #include <linux/init.h> -#include <linux/timer.h> +#include <linux/hrtimer.h> #include <linux/list.h> #include <linux/interrupt.h> -#include <linux/reboot.h> #include <linux/usb.h> +#include <linux/usb/hcd.h> #include <linux/moduleparam.h> #include <linux/dma-mapping.h> - -#include "../core/hcd.h" +#include <linux/debugfs.h> +#include <linux/slab.h> #include <asm/byteorder.h> #include <asm/io.h> #include <asm/irq.h> -#include <asm/system.h> #include <asm/unaligned.h> +#if defined(CONFIG_PPC_PS3) +#include <asm/firmware.h> +#endif /*-------------------------------------------------------------------------*/ @@ -66,63 +63,29 @@ * 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" #define DRIVER_AUTHOR "David Brownell" #define DRIVER_DESC "USB 2.0 'Enhanced' Host Controller (EHCI) Driver" static const char hcd_name [] = "ehci_hcd"; -#undef EHCI_VERBOSE_DEBUG #undef EHCI_URB_TRACE -#ifdef DEBUG -#define EHCI_STATS -#endif - /* magic numbers that can affect system performance */ #define EHCI_TUNE_CERR 3 /* 0-3 qtd retries; 0 == don't stop */ #define EHCI_TUNE_RL_HS 4 /* nak throttle; see 4.9 */ #define EHCI_TUNE_RL_TT 0 #define EHCI_TUNE_MULT_HS 1 /* 1-3 transactions/uframe; 4.10.3 */ #define EHCI_TUNE_MULT_TT 1 -#define EHCI_TUNE_FLS 2 /* (small) 256 frame schedule */ - -#define EHCI_IAA_JIFFIES (HZ/100) /* arbitrary; ~10 msec */ -#define EHCI_IO_JIFFIES (HZ/10) /* io watchdog > irq_thresh */ -#define EHCI_ASYNC_JIFFIES (HZ/20) /* async idle timeout */ -#define EHCI_SHRINK_JIFFIES (HZ/200) /* async qh unlink delay */ +/* + * Some drivers think it's safe to schedule isochronous transfers more than + * 256 ms into the future (partly as a result of an old bug in the scheduling + * code). In an attempt to avoid trouble, we will use a minimum scheduling + * length of 512 frames instead of 256. + */ +#define EHCI_TUNE_FLS 1 /* (medium) 512-frame schedule */ /* Initial IRQ latency: faster than hw default */ static int log2_irq_thresh = 0; // 0 to 6 @@ -134,17 +97,51 @@ static unsigned park = 0; module_param (park, uint, S_IRUGO); MODULE_PARM_DESC (park, "park setting; 1-3 back-to-back async packets"); +/* for flakey hardware, ignore overcurrent indicators */ +static bool ignore_oc = 0; +module_param (ignore_oc, bool, S_IRUGO); +MODULE_PARM_DESC (ignore_oc, "ignore bogus hardware overcurrent indications"); + #define INTR_MASK (STS_IAA | STS_FATAL | STS_PCD | STS_ERR | STS_INT) /*-------------------------------------------------------------------------*/ #include "ehci.h" +#include "pci-quirks.h" + +static void compute_tt_budget(u8 budget_table[EHCI_BANDWIDTH_SIZE], + struct ehci_tt *tt); + +/* + * The MosChip MCS9990 controller updates its microframe counter + * a little before the frame counter, and occasionally we will read + * the invalid intermediate value. Avoid problems by checking the + * microframe number (the low-order 3 bits); if they are 0 then + * re-read the register to get the correct value. + */ +static unsigned ehci_moschip_read_frame_index(struct ehci_hcd *ehci) +{ + unsigned uf; + + uf = ehci_readl(ehci, &ehci->regs->frame_index); + if (unlikely((uf & 7) == 0)) + uf = ehci_readl(ehci, &ehci->regs->frame_index); + return uf; +} + +static inline unsigned ehci_read_frame_index(struct ehci_hcd *ehci) +{ + if (ehci->frame_index_bug) + return ehci_moschip_read_frame_index(ehci); + return ehci_readl(ehci, &ehci->regs->frame_index); +} + #include "ehci-dbg.c" /*-------------------------------------------------------------------------*/ /* - * handshake - spin reading hc until handshake completes or fails + * ehci_handshake - spin reading hc until handshake completes or fails * @ptr: address of hc register to be read * @mask: bits to look at in result of read * @done: value of those bits when handshake succeeds @@ -160,12 +157,13 @@ MODULE_PARM_DESC (park, "park setting; 1-3 back-to-back async packets"); * before driver shutdown. But it also seems to be caused by bugs in cardbus * bridge shutdown: shutting down the bridge before the devices using it. */ -static int handshake (void __iomem *ptr, u32 mask, u32 done, int usec) +int ehci_handshake(struct ehci_hcd *ehci, void __iomem *ptr, + u32 mask, u32 done, int usec) { u32 result; do { - result = readl (ptr); + result = ehci_readl(ehci, ptr); if (result == ~(u32)0) /* card removed */ return -ENODEV; result &= mask; @@ -176,161 +174,203 @@ static int handshake (void __iomem *ptr, u32 mask, u32 done, int usec) } while (usec > 0); return -ETIMEDOUT; } +EXPORT_SYMBOL_GPL(ehci_handshake); -/* force HC to halt state from unknown (EHCI spec section 2.3) */ +/* check TDI/ARC silicon is in host mode */ +static int tdi_in_host_mode (struct ehci_hcd *ehci) +{ + u32 tmp; + + tmp = ehci_readl(ehci, &ehci->regs->usbmode); + return (tmp & 3) == USBMODE_CM_HC; +} + +/* + * Force HC to halt state from unknown (EHCI spec section 2.3). + * Must be called with interrupts enabled and the lock not held. + */ static int ehci_halt (struct ehci_hcd *ehci) { - u32 temp = readl (&ehci->regs->status); + u32 temp; + + spin_lock_irq(&ehci->lock); /* disable any irqs left enabled by previous code */ - writel (0, &ehci->regs->intr_enable); + ehci_writel(ehci, 0, &ehci->regs->intr_enable); - if ((temp & STS_HALT) != 0) + if (ehci_is_TDI(ehci) && !tdi_in_host_mode(ehci)) { + spin_unlock_irq(&ehci->lock); return 0; + } + + /* + * This routine gets called during probe before ehci->command + * has been initialized, so we can't rely on its value. + */ + ehci->command &= ~CMD_RUN; + temp = ehci_readl(ehci, &ehci->regs->command); + temp &= ~(CMD_RUN | CMD_IAAD); + ehci_writel(ehci, temp, &ehci->regs->command); + + spin_unlock_irq(&ehci->lock); + synchronize_irq(ehci_to_hcd(ehci)->irq); - temp = readl (&ehci->regs->command); - temp &= ~CMD_RUN; - writel (temp, &ehci->regs->command); - return handshake (&ehci->regs->status, STS_HALT, STS_HALT, 16 * 125); + return ehci_handshake(ehci, &ehci->regs->status, + STS_HALT, STS_HALT, 16 * 125); } /* put TDI/ARC silicon into EHCI mode */ static void tdi_reset (struct ehci_hcd *ehci) { - u32 __iomem *reg_ptr; u32 tmp; - reg_ptr = (u32 __iomem *)(((u8 __iomem *)ehci->regs) + 0x68); - tmp = readl (reg_ptr); - tmp |= 0x3; - writel (tmp, reg_ptr); + tmp = ehci_readl(ehci, &ehci->regs->usbmode); + tmp |= USBMODE_CM_HC; + /* The default byte access to MMR space is LE after + * controller reset. Set the required endian mode + * for transfer buffers to match the host microprocessor + */ + if (ehci_big_endian_mmio(ehci)) + tmp |= USBMODE_BE; + ehci_writel(ehci, tmp, &ehci->regs->usbmode); } -/* reset a non-running (STS_HALT == 1) controller */ +/* + * Reset a non-running (STS_HALT == 1) controller. + * Must be called with interrupts enabled and the lock not held. + */ static int ehci_reset (struct ehci_hcd *ehci) { int retval; - u32 command = readl (&ehci->regs->command); + u32 command = ehci_readl(ehci, &ehci->regs->command); + + /* If the EHCI debug controller is active, special care must be + * taken before and after a host controller reset */ + if (ehci->debug && !dbgp_reset_prep(ehci_to_hcd(ehci))) + ehci->debug = NULL; command |= CMD_RESET; dbg_cmd (ehci, "reset", command); - writel (command, &ehci->regs->command); - ehci_to_hcd(ehci)->state = HC_STATE_HALT; + ehci_writel(ehci, command, &ehci->regs->command); + ehci->rh_state = EHCI_RH_HALTED; ehci->next_statechange = jiffies; - retval = handshake (&ehci->regs->command, CMD_RESET, 0, 250 * 1000); + retval = ehci_handshake(ehci, &ehci->regs->command, + CMD_RESET, 0, 250 * 1000); + if (ehci->has_hostpc) { + ehci_writel(ehci, USBMODE_EX_HC | USBMODE_EX_VBPS, + &ehci->regs->usbmode_ex); + ehci_writel(ehci, TXFIFO_DEFAULT, &ehci->regs->txfill_tuning); + } if (retval) return retval; if (ehci_is_TDI(ehci)) tdi_reset (ehci); + if (ehci->debug) + dbgp_external_startup(ehci_to_hcd(ehci)); + + ehci->port_c_suspend = ehci->suspended_ports = + ehci->resuming_ports = 0; return retval; } -/* idle the controller (from running) */ +/* + * Idle the controller (turn off the schedules). + * Must be called with interrupts enabled and the lock not held. + */ static void ehci_quiesce (struct ehci_hcd *ehci) { u32 temp; -#ifdef DEBUG - if (!HC_IS_RUNNING (ehci_to_hcd(ehci)->state)) - BUG (); -#endif + if (ehci->rh_state != EHCI_RH_RUNNING) + return; /* wait for any schedule enables/disables to take effect */ - temp = readl (&ehci->regs->command) << 10; - temp &= STS_ASS | STS_PSS; - if (handshake (&ehci->regs->status, STS_ASS | STS_PSS, - temp, 16 * 125) != 0) { - ehci_to_hcd(ehci)->state = HC_STATE_HALT; - return; - } + temp = (ehci->command << 10) & (STS_ASS | STS_PSS); + ehci_handshake(ehci, &ehci->regs->status, STS_ASS | STS_PSS, temp, + 16 * 125); /* then disable anything that's still active */ - temp = readl (&ehci->regs->command); - temp &= ~(CMD_ASE | CMD_IAAD | CMD_PSE); - writel (temp, &ehci->regs->command); + spin_lock_irq(&ehci->lock); + ehci->command &= ~(CMD_ASE | CMD_PSE); + ehci_writel(ehci, ehci->command, &ehci->regs->command); + spin_unlock_irq(&ehci->lock); /* hardware can take 16 microframes to turn off ... */ - if (handshake (&ehci->regs->status, STS_ASS | STS_PSS, - 0, 16 * 125) != 0) { - ehci_to_hcd(ehci)->state = HC_STATE_HALT; - return; - } + ehci_handshake(ehci, &ehci->regs->status, STS_ASS | STS_PSS, 0, + 16 * 125); } /*-------------------------------------------------------------------------*/ -static void ehci_work(struct ehci_hcd *ehci, struct pt_regs *regs); +static void end_unlink_async(struct ehci_hcd *ehci); +static void unlink_empty_async(struct ehci_hcd *ehci); +static void unlink_empty_async_suspended(struct ehci_hcd *ehci); +static void ehci_work(struct ehci_hcd *ehci); +static void start_unlink_intr(struct ehci_hcd *ehci, struct ehci_qh *qh); +static void end_unlink_intr(struct ehci_hcd *ehci, struct ehci_qh *qh); +#include "ehci-timer.c" #include "ehci-hub.c" #include "ehci-mem.c" #include "ehci-q.c" #include "ehci-sched.c" +#include "ehci-sysfs.c" /*-------------------------------------------------------------------------*/ -static void ehci_watchdog (unsigned long param) +/* On some systems, leaving remote wakeup enabled prevents system shutdown. + * The firmware seems to think that powering off is a wakeup event! + * This routine turns off remote wakeup and everything else, on all ports. + */ +static void ehci_turn_off_all_ports(struct ehci_hcd *ehci) { - struct ehci_hcd *ehci = (struct ehci_hcd *) param; - unsigned long flags; + int port = HCS_N_PORTS(ehci->hcs_params); - spin_lock_irqsave (&ehci->lock, flags); - - /* lost IAA irqs wedge things badly; seen with a vt8235 */ - if (ehci->reclaim) { - u32 status = readl (&ehci->regs->status); + while (port--) + ehci_writel(ehci, PORT_RWC_BITS, + &ehci->regs->port_status[port]); +} - if (status & STS_IAA) { - ehci_vdbg (ehci, "lost IAA\n"); - COUNT (ehci->stats.lost_iaa); - writel (STS_IAA, &ehci->regs->status); - ehci->reclaim_ready = 1; - } - } +/* + * Halt HC, turn off all ports, and let the BIOS use the companion controllers. + * Must be called with interrupts enabled and the lock not held. + */ +static void ehci_silence_controller(struct ehci_hcd *ehci) +{ + ehci_halt(ehci); - /* stop async processing after it's idled a bit */ - if (test_bit (TIMER_ASYNC_OFF, &ehci->actions)) - start_unlink_async (ehci, ehci->async); + spin_lock_irq(&ehci->lock); + ehci->rh_state = EHCI_RH_HALTED; + ehci_turn_off_all_ports(ehci); - /* ehci could run by timer, without IRQs ... */ - ehci_work (ehci, NULL); + /* make BIOS/etc use companion controller during reboot */ + ehci_writel(ehci, 0, &ehci->regs->configured_flag); - spin_unlock_irqrestore (&ehci->lock, flags); + /* unblock posted writes */ + ehci_readl(ehci, &ehci->regs->configured_flag); + spin_unlock_irq(&ehci->lock); } -/* Reboot notifiers kick in for silicon on any bus (not just pci, etc). +/* 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 int -ehci_reboot (struct notifier_block *self, unsigned long code, void *null) +static void ehci_shutdown(struct usb_hcd *hcd) { - struct ehci_hcd *ehci; - - ehci = container_of (self, struct ehci_hcd, reboot_notifier); - (void) ehci_halt (ehci); - - /* make BIOS/etc use companion controller during reboot */ - writel (0, &ehci->regs->configured_flag); - return 0; -} + struct ehci_hcd *ehci = hcd_to_ehci(hcd); -static void ehci_port_power (struct ehci_hcd *ehci, int is_on) -{ - unsigned port; + spin_lock_irq(&ehci->lock); + ehci->shutdown = true; + ehci->rh_state = EHCI_RH_STOPPING; + ehci->enabled_hrtimer_events = 0; + spin_unlock_irq(&ehci->lock); - if (!HCS_PPC (ehci->hcs_params)) - return; + ehci_silence_controller(ehci); - ehci_dbg (ehci, "...power%s ports...\n", is_on ? "up" : "down"); - for (port = HCS_N_PORTS (ehci->hcs_params); port > 0; ) - (void) ehci_hub_control(ehci_to_hcd(ehci), - is_on ? SetPortFeature : ClearPortFeature, - USB_PORT_FEAT_POWER, - port--, NULL, 0); - msleep(20); + hrtimer_cancel(&ehci->hrtimer); } /*-------------------------------------------------------------------------*/ @@ -339,121 +379,132 @@ static void ehci_port_power (struct ehci_hcd *ehci, int is_on) * ehci_work is called from some interrupts, timers, and so on. * it calls driver completion functions, after dropping ehci->lock. */ -static void ehci_work (struct ehci_hcd *ehci, struct pt_regs *regs) +static void ehci_work (struct ehci_hcd *ehci) { - timer_action_done (ehci, TIMER_IO_WATCHDOG); - if (ehci->reclaim_ready) - end_unlink_async (ehci, regs); - /* another CPU may drop ehci->lock during a schedule scan while * it reports urb completions. this flag guards against bogus * attempts at re-entrant schedule scanning. */ - if (ehci->scanning) + if (ehci->scanning) { + ehci->need_rescan = true; return; - ehci->scanning = 1; - scan_async (ehci, regs); - if (ehci->next_uframe != -1) - scan_periodic (ehci, regs); - ehci->scanning = 0; + } + ehci->scanning = true; + + rescan: + ehci->need_rescan = false; + if (ehci->async_count) + scan_async(ehci); + if (ehci->intr_count > 0) + scan_intr(ehci); + if (ehci->isoc_count > 0) + scan_isoc(ehci); + if (ehci->need_rescan) + goto rescan; + ehci->scanning = false; /* the IO watchdog guards against hardware or driver bugs that * misplace IRQs, and should let us run completely without IRQs. * such lossage has been observed on both VT6202 and VT8235. */ - if (HC_IS_RUNNING (ehci_to_hcd(ehci)->state) && - (ehci->async->qh_next.ptr != NULL || - ehci->periodic_sched != 0)) - timer_action (ehci, TIMER_IO_WATCHDOG); + turn_on_io_watchdog(ehci); } +/* + * 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); spin_lock_irq(&ehci->lock); - if (HC_IS_RUNNING (hcd->state)) - ehci_quiesce (ehci); - - ehci_reset (ehci); - writel (0, &ehci->regs->intr_enable); + ehci->enabled_hrtimer_events = 0; spin_unlock_irq(&ehci->lock); - /* let companion controllers work when we aren't */ - writel (0, &ehci->regs->configured_flag); - unregister_reboot_notifier (&ehci->reboot_notifier); + ehci_quiesce(ehci); + ehci_silence_controller(ehci); + ehci_reset (ehci); + hrtimer_cancel(&ehci->hrtimer); + remove_sysfs_files(ehci); remove_debug_files (ehci); /* root hub is shut down separately (first, when possible) */ spin_lock_irq (&ehci->lock); - if (ehci->async) - ehci_work (ehci, NULL); + end_free_itds(ehci); spin_unlock_irq (&ehci->lock); ehci_mem_cleanup (ehci); -#ifdef EHCI_STATS - ehci_dbg (ehci, "irq normal %ld err %ld reclaim %ld (lost %ld)\n", - ehci->stats.normal, ehci->stats.error, ehci->stats.reclaim, - ehci->stats.lost_iaa); - ehci_dbg (ehci, "complete %ld unlink %ld\n", - ehci->stats.complete, ehci->stats.unlink); -#endif + if (ehci->amd_pll_fix == 1) + usb_amd_dev_put(); - dbg_status (ehci, "ehci_stop completed", readl (&ehci->regs->status)); + dbg_status (ehci, "ehci_stop completed", + ehci_readl(ehci, &ehci->regs->status)); } -static int ehci_run (struct usb_hcd *hcd) +/* one-time init, only for memory state */ +static int ehci_init(struct usb_hcd *hcd) { - struct ehci_hcd *ehci = hcd_to_ehci (hcd); + struct ehci_hcd *ehci = hcd_to_ehci(hcd); u32 temp; int retval; u32 hcc_params; - int first; - - /* skip some things on restart paths */ - first = (ehci->watchdog.data == 0); - if (first) { - init_timer (&ehci->watchdog); - ehci->watchdog.function = ehci_watchdog; - ehci->watchdog.data = (unsigned long) ehci; - } + struct ehci_qh_hw *hw; + + spin_lock_init(&ehci->lock); + + /* + * keep io watchdog by default, those good HCDs could turn off it later + */ + ehci->need_io_watchdog = 1; + + hrtimer_init(&ehci->hrtimer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS); + ehci->hrtimer.function = ehci_hrtimer_func; + ehci->next_hrtimer_event = EHCI_HRTIMER_NO_EVENT; + + hcc_params = ehci_readl(ehci, &ehci->caps->hcc_params); + + /* + * by default set standard 80% (== 100 usec/uframe) max periodic + * bandwidth as required by USB 2.0 + */ + ehci->uframe_periodic_max = 100; /* * hw default: 1K periodic list heads, one per frame. * periodic_size can shrink by USBCMD update if hcc_params allows. */ ehci->periodic_size = DEFAULT_I_TDPS; - if (first && (retval = ehci_mem_init (ehci, GFP_KERNEL)) < 0) + INIT_LIST_HEAD(&ehci->async_unlink); + INIT_LIST_HEAD(&ehci->async_idle); + INIT_LIST_HEAD(&ehci->intr_unlink_wait); + INIT_LIST_HEAD(&ehci->intr_unlink); + INIT_LIST_HEAD(&ehci->intr_qh_list); + INIT_LIST_HEAD(&ehci->cached_itd_list); + INIT_LIST_HEAD(&ehci->cached_sitd_list); + INIT_LIST_HEAD(&ehci->tt_list); + + if (HCC_PGM_FRAMELISTLEN(hcc_params)) { + /* periodic schedule size can be smaller than default */ + switch (EHCI_TUNE_FLS) { + case 0: ehci->periodic_size = 1024; break; + case 1: ehci->periodic_size = 512; break; + case 2: ehci->periodic_size = 256; break; + default: BUG(); + } + } + if ((retval = ehci_mem_init(ehci, GFP_KERNEL)) < 0) return retval; /* controllers may cache some of the periodic schedule ... */ - hcc_params = readl (&ehci->caps->hcc_params); - if (HCC_ISOC_CACHE (hcc_params)) // full frame cache - ehci->i_thresh = 8; + if (HCC_ISOC_CACHE(hcc_params)) // full frame cache + ehci->i_thresh = 0; else // N microframes cached - ehci->i_thresh = 2 + HCC_ISOC_THRES (hcc_params); - - ehci->reclaim = NULL; - ehci->reclaim_ready = 0; - ehci->next_uframe = -1; - - /* controller state: unknown --> reset */ - - /* EHCI spec section 4.1 */ - if ((retval = ehci_reset (ehci)) != 0) { - ehci_mem_cleanup (ehci); - return retval; - } - writel (ehci->periodic_dma, &ehci->regs->frame_list); + ehci->i_thresh = 2 + HCC_ISOC_THRES(hcc_params); /* * dedicate a qh for the async ring head, since we couldn't unlink @@ -462,42 +513,27 @@ static int ehci_run (struct usb_hcd *hcd) * its dummy is used in hw_alt_next of many tds, to prevent the qh * from automatically advancing to the next td after short reads. */ - if (first) { - ehci->async->qh_next.qh = NULL; - ehci->async->hw_next = QH_NEXT (ehci->async->qh_dma); - ehci->async->hw_info1 = cpu_to_le32 (QH_HEAD); - ehci->async->hw_token = cpu_to_le32 (QTD_STS_HALT); - ehci->async->hw_qtd_next = EHCI_LIST_END; - ehci->async->qh_state = QH_STATE_LINKED; - ehci->async->hw_alt_next = QTD_NEXT (ehci->async->dummy->qtd_dma); - } - writel ((u32)ehci->async->qh_dma, &ehci->regs->async_next); - - /* - * hcc_params controls whether ehci->regs->segment must (!!!) - * be used; it constrains QH/ITD/SITD and QTD locations. - * pci_pool consistent memory always uses segment zero. - * streaming mappings for I/O buffers, like pci_map_single(), - * can return segments above 4GB, if the device allows. - * - * NOTE: the dma mask is visible through dma_supported(), so - * drivers can pass this info along ... like NETIF_F_HIGHDMA, - * Scsi_Host.highmem_io, and so forth. It's readonly to all - * host side drivers though. - */ - if (HCC_64BIT_ADDR (hcc_params)) { - writel (0, &ehci->regs->segment); -#if 0 -// this is deeply broken on almost all architectures - if (!dma_set_mask (hcd->self.controller, DMA_64BIT_MASK)) - ehci_info (ehci, "enabled 64bit DMA\n"); + ehci->async->qh_next.qh = NULL; + hw = ehci->async->hw; + hw->hw_next = QH_NEXT(ehci, ehci->async->qh_dma); + hw->hw_info1 = cpu_to_hc32(ehci, QH_HEAD); +#if defined(CONFIG_PPC_PS3) + hw->hw_info1 |= cpu_to_hc32(ehci, QH_INACTIVATE); #endif - } + hw->hw_token = cpu_to_hc32(ehci, QTD_STS_HALT); + hw->hw_qtd_next = EHCI_LIST_END(ehci); + ehci->async->qh_state = QH_STATE_LINKED; + hw->hw_alt_next = QTD_NEXT(ehci, ehci->async->dummy->qtd_dma); /* clear interrupt enables, set irq latency */ if (log2_irq_thresh < 0 || log2_irq_thresh > 6) log2_irq_thresh = 0; temp = 1 << (16 + log2_irq_thresh); + if (HCC_PER_PORT_CHANGE_EVENT(hcc_params)) { + ehci->has_ppcd = 1; + ehci_dbg(ehci, "enable per-port change event\n"); + temp |= CMD_PPCEE; + } if (HCC_CANPARK(hcc_params)) { /* HW default park == 3, on hardware that supports it (like * NVidia and ALI silicon), maximizes throughput on the async @@ -507,72 +543,159 @@ static int ehci_run (struct usb_hcd *hcd) * make problems: throughput reduction (!), data errors... */ if (park) { - park = min (park, (unsigned) 3); + park = min(park, (unsigned) 3); temp |= CMD_PARK; temp |= park << 8; } - ehci_info (ehci, "park %d\n", park); + ehci_dbg(ehci, "park %d\n", park); } - if (HCC_PGM_FRAMELISTLEN (hcc_params)) { + if (HCC_PGM_FRAMELISTLEN(hcc_params)) { /* periodic schedule size can be smaller than default */ temp &= ~(3 << 2); temp |= (EHCI_TUNE_FLS << 2); - switch (EHCI_TUNE_FLS) { - case 0: ehci->periodic_size = 1024; break; - case 1: ehci->periodic_size = 512; break; - case 2: ehci->periodic_size = 256; break; - default: BUG (); - } } + ehci->command = temp; + + /* Accept arbitrarily long scatter-gather lists */ + if (!(hcd->driver->flags & HCD_LOCAL_MEM)) + hcd->self.sg_tablesize = ~0; + return 0; +} + +/* start HC running; it's halted, ehci_init() has been run (once) */ +static int ehci_run (struct usb_hcd *hcd) +{ + struct ehci_hcd *ehci = hcd_to_ehci (hcd); + u32 temp; + u32 hcc_params; + + hcd->uses_new_polling = 1; + + /* EHCI spec section 4.1 */ + + ehci_writel(ehci, ehci->periodic_dma, &ehci->regs->frame_list); + ehci_writel(ehci, (u32)ehci->async->qh_dma, &ehci->regs->async_next); + + /* + * hcc_params controls whether ehci->regs->segment must (!!!) + * be used; it constrains QH/ITD/SITD and QTD locations. + * pci_pool consistent memory always uses segment zero. + * streaming mappings for I/O buffers, like pci_map_single(), + * can return segments above 4GB, if the device allows. + * + * NOTE: the dma mask is visible through dma_supported(), so + * drivers can pass this info along ... like NETIF_F_HIGHDMA, + * Scsi_Host.highmem_io, and so forth. It's readonly to all + * host side drivers though. + */ + hcc_params = ehci_readl(ehci, &ehci->caps->hcc_params); + if (HCC_64BIT_ADDR(hcc_params)) { + ehci_writel(ehci, 0, &ehci->regs->segment); +#if 0 +// this is deeply broken on almost all architectures + if (!dma_set_mask(hcd->self.controller, DMA_BIT_MASK(64))) + ehci_info(ehci, "enabled 64bit DMA\n"); +#endif + } + + // Philips, Intel, and maybe others need CMD_RUN before the // root hub will detect new devices (why?); NEC doesn't - temp |= CMD_RUN; - writel (temp, &ehci->regs->command); - dbg_cmd (ehci, "init", temp); - - /* set async sleep time = 10 us ... ? */ + ehci->command &= ~(CMD_LRESET|CMD_IAAD|CMD_PSE|CMD_ASE|CMD_RESET); + ehci->command |= CMD_RUN; + ehci_writel(ehci, ehci->command, &ehci->regs->command); + dbg_cmd (ehci, "init", ehci->command); /* * Start, enabling full USB 2.0 functionality ... usb 1.1 devices * are explicitly handed to companion controller(s), so no TT is * involved with the root hub. (Except where one is integrated, * and there's no companion controller unless maybe for USB OTG.) + * + * Turning on the CF flag will transfer ownership of all ports + * from the companions to the EHCI controller. If any of the + * companions are in the middle of a port reset at the time, it + * could cause trouble. Write-locking ehci_cf_port_reset_rwsem + * guarantees that no resets are in progress. After we set CF, + * a short delay lets the hardware catch up; new resets shouldn't + * be started before the port switching actions could complete. */ - if (first) { - ehci->reboot_notifier.notifier_call = ehci_reboot; - register_reboot_notifier (&ehci->reboot_notifier); - } - - hcd->state = HC_STATE_RUNNING; - writel (FLAG_CF, &ehci->regs->configured_flag); - readl (&ehci->regs->command); /* unblock posted write */ - - temp = HC_VERSION(readl (&ehci->caps->hc_capbase)); + down_write(&ehci_cf_port_reset_rwsem); + ehci->rh_state = EHCI_RH_RUNNING; + ehci_writel(ehci, FLAG_CF, &ehci->regs->configured_flag); + ehci_readl(ehci, &ehci->regs->command); /* unblock posted writes */ + msleep(5); + up_write(&ehci_cf_port_reset_rwsem); + ehci->last_periodic_enable = ktime_get_real(); + + temp = HC_VERSION(ehci, ehci_readl(ehci, &ehci->caps->hc_capbase)); ehci_info (ehci, - "USB %x.%x %s, EHCI %x.%02x, driver %s\n", + "USB %x.%x started, EHCI %x.%02x%s\n", ((ehci->sbrn & 0xf0)>>4), (ehci->sbrn & 0x0f), - first ? "initialized" : "restarted", - temp >> 8, temp & 0xff, DRIVER_VERSION); + temp >> 8, temp & 0xff, + ignore_oc ? ", overcurrent ignored" : ""); - writel (INTR_MASK, &ehci->regs->intr_enable); /* Turn On Interrupts */ + ehci_writel(ehci, INTR_MASK, + &ehci->regs->intr_enable); /* Turn On Interrupts */ - if (first) - create_debug_files (ehci); + /* GRR this is run-once init(), being done every time the HC starts. + * So long as they're part of class devices, we can't do it init() + * since the class device isn't created that early. + */ + create_debug_files(ehci); + create_sysfs_files(ehci); return 0; } +int ehci_setup(struct usb_hcd *hcd) +{ + struct ehci_hcd *ehci = hcd_to_ehci(hcd); + int retval; + + ehci->regs = (void __iomem *)ehci->caps + + HC_LENGTH(ehci, ehci_readl(ehci, &ehci->caps->hc_capbase)); + dbg_hcs_params(ehci, "reset"); + dbg_hcc_params(ehci, "reset"); + + /* cache this readonly data; minimize chip reads */ + ehci->hcs_params = ehci_readl(ehci, &ehci->caps->hcs_params); + + ehci->sbrn = HCD_USB2; + + /* data structure init */ + retval = ehci_init(hcd); + if (retval) + return retval; + + retval = ehci_halt(ehci); + if (retval) + return retval; + + ehci_reset(ehci); + + return 0; +} +EXPORT_SYMBOL_GPL(ehci_setup); + /*-------------------------------------------------------------------------*/ -static irqreturn_t ehci_irq (struct usb_hcd *hcd, struct pt_regs *regs) +static irqreturn_t ehci_irq (struct usb_hcd *hcd) { struct ehci_hcd *ehci = hcd_to_ehci (hcd); - u32 status; + u32 status, masked_status, pcd_status = 0, cmd; int bh; + unsigned long flags; - spin_lock (&ehci->lock); + /* + * For threadirqs option we use spin_lock_irqsave() variant to prevent + * deadlock with ehci hrtimer callback, because hrtimer callbacks run + * in interrupt context even when threadirqs is specified. We can go + * back to spin_lock() variant when hrtimer callbacks become threaded. + */ + spin_lock_irqsave(&ehci->lock, flags); - status = readl (&ehci->regs->status); + status = ehci_readl(ehci, &ehci->regs->status); /* e.g. cardbus physical eject */ if (status == ~(u32) 0) { @@ -580,24 +703,23 @@ static irqreturn_t ehci_irq (struct usb_hcd *hcd, struct pt_regs *regs) goto dead; } - status &= INTR_MASK; - if (!status) { /* irq sharing? */ - spin_unlock(&ehci->lock); + /* + * We don't use STS_FLR, but some controllers don't like it to + * remain on, so mask it out along with the other status bits. + */ + masked_status = status & (INTR_MASK | STS_FLR); + + /* Shared IRQ? */ + if (!masked_status || unlikely(ehci->rh_state == EHCI_RH_HALTED)) { + spin_unlock_irqrestore(&ehci->lock, flags); return IRQ_NONE; } /* clear (just) interrupts */ - writel (status, &ehci->regs->status); - readl (&ehci->regs->command); /* unblock posted write */ + ehci_writel(ehci, masked_status, &ehci->regs->status); + cmd = ehci_readl(ehci, &ehci->regs->command); bh = 0; -#ifdef EHCI_VERBOSE_DEBUG - /* unrequested/ignored: Frame List Rollover */ - dbg_status (ehci, "irq", status); -#endif - - /* INT, ERR, and IAA interrupt rates can be throttled */ - /* normal [4.15.1.2] or error [4.15.1.1] completion */ if (likely ((status & (STS_INT|STS_ERR)) != 0)) { if (likely ((status & STS_ERR) == 0)) @@ -609,60 +731,100 @@ static irqreturn_t ehci_irq (struct usb_hcd *hcd, struct pt_regs *regs) /* complete the unlinking of some qh [4.15.2.3] */ if (status & STS_IAA) { - COUNT (ehci->stats.reclaim); - ehci->reclaim_ready = 1; - bh = 1; + + /* Turn off the IAA watchdog */ + ehci->enabled_hrtimer_events &= ~BIT(EHCI_HRTIMER_IAA_WATCHDOG); + + /* + * Mild optimization: Allow another IAAD to reset the + * hrtimer, if one occurs before the next expiration. + * In theory we could always cancel the hrtimer, but + * tests show that about half the time it will be reset + * for some other event anyway. + */ + if (ehci->next_hrtimer_event == EHCI_HRTIMER_IAA_WATCHDOG) + ++ehci->next_hrtimer_event; + + /* guard against (alleged) silicon errata */ + if (cmd & CMD_IAAD) + ehci_dbg(ehci, "IAA with IAAD still set?\n"); + if (ehci->iaa_in_progress) + COUNT(ehci->stats.iaa); + end_unlink_async(ehci); } /* remote wakeup [4.3.1] */ - if ((status & STS_PCD) && hcd->remote_wakeup) { + if (status & STS_PCD) { unsigned i = HCS_N_PORTS (ehci->hcs_params); + u32 ppcd = ~0; + + /* kick root hub later */ + pcd_status = status; /* resume root hub? */ - status = readl (&ehci->regs->command); - if (!(status & CMD_RUN)) - writel (status | CMD_RUN, &ehci->regs->command); + if (ehci->rh_state == EHCI_RH_SUSPENDED) + usb_hcd_resume_root_hub(hcd); + + /* get per-port change detect bits */ + if (ehci->has_ppcd) + ppcd = status >> 16; while (i--) { - status = readl (&ehci->regs->port_status [i]); - if (status & PORT_OWNER) + int pstatus; + + /* leverage per-port change bits feature */ + if (!(ppcd & (1 << i))) + continue; + pstatus = ehci_readl(ehci, + &ehci->regs->port_status[i]); + + if (pstatus & PORT_OWNER) continue; - if (!(status & PORT_RESUME) - || ehci->reset_done [i] != 0) + if (!(test_bit(i, &ehci->suspended_ports) && + ((pstatus & PORT_RESUME) || + !(pstatus & PORT_SUSPEND)) && + (pstatus & PORT_PE) && + ehci->reset_done[i] == 0)) continue; /* start 20 msec resume signaling from this port, * and make khubd collect PORT_STAT_C_SUSPEND to - * stop that signaling. + * stop that signaling. Use 5 ms extra for safety, + * like usb_port_resume() does. */ - ehci->reset_done [i] = jiffies + msecs_to_jiffies (20); - mod_timer (&hcd->rh_timer, - ehci->reset_done [i] + 1); + ehci->reset_done[i] = jiffies + msecs_to_jiffies(25); + set_bit(i, &ehci->resuming_ports); ehci_dbg (ehci, "port %d remote wakeup\n", i + 1); + usb_hcd_start_port_resume(&hcd->self, i); + mod_timer(&hcd->rh_timer, ehci->reset_done[i]); } } /* PCI errors [4.15.2.4] */ if (unlikely ((status & STS_FATAL) != 0)) { - /* bogus "fatal" IRQs appear on some chips... why? */ - status = readl (&ehci->regs->status); - dbg_cmd (ehci, "fatal", readl (&ehci->regs->command)); - dbg_status (ehci, "fatal", status); - if (status & STS_HALT) { - ehci_err (ehci, "fatal error\n"); + ehci_err(ehci, "fatal error\n"); + dbg_cmd(ehci, "fatal", cmd); + dbg_status(ehci, "fatal", status); dead: - ehci_reset (ehci); - writel (0, &ehci->regs->configured_flag); - /* generic layer kills/unlinks all urbs, then - * uses ehci_stop to clean up the rest - */ - bh = 1; - } + usb_hc_died(hcd); + + /* Don't let the controller do anything more */ + ehci->shutdown = true; + ehci->rh_state = EHCI_RH_STOPPING; + ehci->command &= ~(CMD_RUN | CMD_ASE | CMD_PSE); + ehci_writel(ehci, ehci->command, &ehci->regs->command); + ehci_writel(ehci, 0, &ehci->regs->intr_enable); + ehci_handle_controller_death(ehci); + + /* Handle completions when the controller stops */ + bh = 0; } if (bh) - ehci_work (ehci, regs); - spin_unlock (&ehci->lock); + ehci_work (ehci); + spin_unlock_irqrestore(&ehci->lock, flags); + if (pcd_status) + usb_hcd_poll_rh_status(hcd); return IRQ_HANDLED; } @@ -682,7 +844,6 @@ dead: */ static int ehci_urb_enqueue ( struct usb_hcd *hcd, - struct usb_host_endpoint *ep, struct urb *urb, gfp_t mem_flags ) { @@ -692,17 +853,23 @@ 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; - return submit_async (ehci, ep, urb, &qtd_list, mem_flags); + return submit_async(ehci, urb, &qtd_list, mem_flags); case PIPE_INTERRUPT: if (!qh_urb_transaction (ehci, urb, &qtd_list, mem_flags)) return -ENOMEM; - return intr_submit (ehci, ep, urb, &qtd_list, mem_flags); + return intr_submit(ehci, urb, &qtd_list, mem_flags); case PIPE_ISOCHRONOUS: if (urb->dev->speed == USB_SPEED_HIGH) @@ -712,96 +879,54 @@ static int ehci_urb_enqueue ( } } -static void unlink_async (struct ehci_hcd *ehci, struct ehci_qh *qh) -{ - /* if we need to use IAA and it's busy, defer */ - if (qh->qh_state == QH_STATE_LINKED - && ehci->reclaim - && HC_IS_RUNNING (ehci_to_hcd(ehci)->state)) { - struct ehci_qh *last; - - for (last = ehci->reclaim; - last->reclaim; - last = last->reclaim) - continue; - qh->qh_state = QH_STATE_UNLINK_WAIT; - last->reclaim = qh; - - /* bypass IAA if the hc can't care */ - } else if (!HC_IS_RUNNING (ehci_to_hcd(ehci)->state) && ehci->reclaim) - end_unlink_async (ehci, NULL); - - /* something else might have unlinked the qh by now */ - if (qh->qh_state == QH_STATE_LINKED) - start_unlink_async (ehci, qh); -} - /* remove from hardware lists * completions normally happen asynchronously */ -static int ehci_urb_dequeue (struct usb_hcd *hcd, struct urb *urb) +static int ehci_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status) { struct ehci_hcd *ehci = hcd_to_ehci (hcd); struct ehci_qh *qh; unsigned long flags; + int rc; spin_lock_irqsave (&ehci->lock, flags); - switch (usb_pipetype (urb->pipe)) { - // case PIPE_CONTROL: - // case PIPE_BULK: - default: - qh = (struct ehci_qh *) urb->hcpriv; - if (!qh) - break; - unlink_async (ehci, qh); - break; + rc = usb_hcd_check_unlink_urb(hcd, urb, status); + if (rc) + goto done; - case PIPE_INTERRUPT: + if (usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS) { + /* + * We don't expedite dequeue for isochronous URBs. + * Just wait until they complete normally or their + * time slot expires. + */ + } else { qh = (struct ehci_qh *) urb->hcpriv; - if (!qh) - break; + qh->exception = 1; switch (qh->qh_state) { case QH_STATE_LINKED: - intr_deschedule (ehci, qh); - /* FALL THROUGH */ + if (usb_pipetype(urb->pipe) == PIPE_INTERRUPT) + start_unlink_intr(ehci, qh); + else + start_unlink_async(ehci, qh); + break; + case QH_STATE_COMPLETING: + qh->dequeue_during_giveback = 1; + break; + case QH_STATE_UNLINK: + case QH_STATE_UNLINK_WAIT: + /* already started */ + break; case QH_STATE_IDLE: - qh_completions (ehci, qh, NULL); + /* QH might be waiting for a Clear-TT-Buffer */ + qh_completions(ehci, qh); break; - default: - ehci_dbg (ehci, "bogus qh %p state %d\n", - qh, qh->qh_state); - goto done; - } - - /* reschedule QH iff another request is queued */ - if (!list_empty (&qh->qtd_list) - && HC_IS_RUNNING (hcd->state)) { - int status; - - status = qh_schedule (ehci, qh); - spin_unlock_irqrestore (&ehci->lock, flags); - - if (status != 0) { - // shouldn't happen often, but ... - // FIXME kill those tds' urbs - err ("can't reschedule qh %p, err %d", - qh, status); - } - return status; } - break; - - case PIPE_ISOCHRONOUS: - // itd or sitd ... - - // wait till next completion, do it then. - // completion irqs can wait up to 1024 msec, - break; } done: spin_unlock_irqrestore (&ehci->lock, flags); - return 0; + return rc; } /*-------------------------------------------------------------------------*/ @@ -813,7 +938,7 @@ ehci_endpoint_disable (struct usb_hcd *hcd, struct usb_host_endpoint *ep) { struct ehci_hcd *ehci = hcd_to_ehci (hcd); unsigned long flags; - struct ehci_qh *qh, *tmp; + struct ehci_qh *qh; /* ASSERT: any requests/urbs are being unlinked */ /* ASSERT: nobody can be submitting urbs for this any more */ @@ -827,37 +952,47 @@ rescan: /* endpoints can be iso streams. for now, we don't * accelerate iso completions ... so spin a while. */ - if (qh->hw_info1 == 0) { - ehci_vdbg (ehci, "iso delay\n"); - goto idle_timeout; + if (qh->hw == NULL) { + struct ehci_iso_stream *stream = ep->hcpriv; + + if (!list_empty(&stream->td_list)) + goto idle_timeout; + + /* BUG_ON(!list_empty(&stream->free_list)); */ + reserve_release_iso_bandwidth(ehci, stream, -1); + kfree(stream); + goto done; } - if (!HC_IS_RUNNING (hcd->state)) + qh->exception = 1; + if (ehci->rh_state < EHCI_RH_RUNNING) qh->qh_state = QH_STATE_IDLE; switch (qh->qh_state) { case QH_STATE_LINKED: - for (tmp = ehci->async->qh_next.qh; - tmp && tmp != qh; - tmp = tmp->qh_next.qh) - continue; - /* periodic qh self-unlinks on empty */ - if (!tmp) - goto nogood; - unlink_async (ehci, qh); + WARN_ON(!list_empty(&qh->qtd_list)); + if (usb_endpoint_type(&ep->desc) != USB_ENDPOINT_XFER_INT) + start_unlink_async(ehci, qh); + else + start_unlink_intr(ehci, qh); /* FALL THROUGH */ + case QH_STATE_COMPLETING: /* already in unlinking */ case QH_STATE_UNLINK: /* wait for hw to finish? */ + case QH_STATE_UNLINK_WAIT: idle_timeout: spin_unlock_irqrestore (&ehci->lock, flags); schedule_timeout_uninterruptible(1); goto rescan; case QH_STATE_IDLE: /* fully unlinked */ + if (qh->clearing_tt) + goto idle_timeout; if (list_empty (&qh->qtd_list)) { - qh_put (qh); + if (qh->ps.bw_uperiod) + reserve_release_intr_bandwidth(ehci, qh, -1); + qh_destroy(ehci, qh); break; } /* else FALL THROUGH */ default: -nogood: /* caller was supposed to have unlinked any requests; * that's not our job. just leak this memory. */ @@ -866,30 +1001,400 @@ nogood: list_empty (&qh->qtd_list) ? "" : "(has tds)"); break; } + done: ep->hcpriv = NULL; -done: spin_unlock_irqrestore (&ehci->lock, flags); - return; +} + +static void +ehci_endpoint_reset(struct usb_hcd *hcd, struct usb_host_endpoint *ep) +{ + struct ehci_hcd *ehci = hcd_to_ehci(hcd); + struct ehci_qh *qh; + int eptype = usb_endpoint_type(&ep->desc); + int epnum = usb_endpoint_num(&ep->desc); + int is_out = usb_endpoint_dir_out(&ep->desc); + unsigned long flags; + + if (eptype != USB_ENDPOINT_XFER_BULK && eptype != USB_ENDPOINT_XFER_INT) + return; + + spin_lock_irqsave(&ehci->lock, flags); + qh = ep->hcpriv; + + /* For Bulk and Interrupt endpoints we maintain the toggle state + * in the hardware; the toggle bits in udev aren't used at all. + * When an endpoint is reset by usb_clear_halt() we must reset + * the toggle bit in the QH. + */ + if (qh) { + if (!list_empty(&qh->qtd_list)) { + WARN_ONCE(1, "clear_halt for a busy endpoint\n"); + } else { + /* The toggle value in the QH can't be updated + * while the QH is active. Unlink it now; + * re-linking will call qh_refresh(). + */ + usb_settoggle(qh->ps.udev, epnum, is_out, 0); + qh->exception = 1; + if (eptype == USB_ENDPOINT_XFER_BULK) + start_unlink_async(ehci, qh); + else + start_unlink_intr(ehci, qh); + } + } + spin_unlock_irqrestore(&ehci->lock, flags); } static int ehci_get_frame (struct usb_hcd *hcd) { struct ehci_hcd *ehci = hcd_to_ehci (hcd); - return (readl (&ehci->regs->frame_index) >> 3) % ehci->periodic_size; + return (ehci_read_frame_index(ehci) >> 3) % ehci->periodic_size; +} + +/*-------------------------------------------------------------------------*/ + +/* Device addition and removal */ + +static void ehci_remove_device(struct usb_hcd *hcd, struct usb_device *udev) +{ + struct ehci_hcd *ehci = hcd_to_ehci(hcd); + + spin_lock_irq(&ehci->lock); + drop_tt(udev); + spin_unlock_irq(&ehci->lock); +} + +/*-------------------------------------------------------------------------*/ + +#ifdef CONFIG_PM + +/* suspend/resume, section 4.3 */ + +/* These routines handle the generic parts of controller suspend/resume */ + +int ehci_suspend(struct usb_hcd *hcd, bool do_wakeup) +{ + struct ehci_hcd *ehci = hcd_to_ehci(hcd); + + if (time_before(jiffies, ehci->next_statechange)) + msleep(10); + + /* + * Root hub was already suspended. Disable IRQ emission and + * mark HW unaccessible. The PM and USB cores make sure that + * the root hub is either suspended or stopped. + */ + ehci_prepare_ports_for_controller_suspend(ehci, do_wakeup); + + spin_lock_irq(&ehci->lock); + ehci_writel(ehci, 0, &ehci->regs->intr_enable); + (void) ehci_readl(ehci, &ehci->regs->intr_enable); + + clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags); + spin_unlock_irq(&ehci->lock); + + synchronize_irq(hcd->irq); + + /* Check for race with a wakeup request */ + if (do_wakeup && HCD_WAKEUP_PENDING(hcd)) { + ehci_resume(hcd, false); + return -EBUSY; + } + + return 0; } +EXPORT_SYMBOL_GPL(ehci_suspend); + +/* Returns 0 if power was preserved, 1 if power was lost */ +int ehci_resume(struct usb_hcd *hcd, bool hibernated) +{ + struct ehci_hcd *ehci = hcd_to_ehci(hcd); + + if (time_before(jiffies, ehci->next_statechange)) + msleep(100); + + /* Mark hardware accessible again as we are back to full power by now */ + set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags); + + if (ehci->shutdown) + return 0; /* Controller is dead */ + + /* + * If CF is still set and we aren't resuming from hibernation + * then we maintained suspend power. + * Just undo the effect of ehci_suspend(). + */ + if (ehci_readl(ehci, &ehci->regs->configured_flag) == FLAG_CF && + !hibernated) { + int mask = INTR_MASK; + + ehci_prepare_ports_for_controller_resume(ehci); + + spin_lock_irq(&ehci->lock); + if (ehci->shutdown) + goto skip; + + if (!hcd->self.root_hub->do_remote_wakeup) + mask &= ~STS_PCD; + ehci_writel(ehci, mask, &ehci->regs->intr_enable); + ehci_readl(ehci, &ehci->regs->intr_enable); + skip: + spin_unlock_irq(&ehci->lock); + return 0; + } + + /* + * Else reset, to cope with power loss or resume from hibernation + * having let the firmware kick in during reboot. + */ + usb_root_hub_lost_power(hcd->self.root_hub); + (void) ehci_halt(ehci); + (void) ehci_reset(ehci); + + spin_lock_irq(&ehci->lock); + if (ehci->shutdown) + goto skip; + + ehci_writel(ehci, ehci->command, &ehci->regs->command); + ehci_writel(ehci, FLAG_CF, &ehci->regs->configured_flag); + ehci_readl(ehci, &ehci->regs->command); /* unblock posted writes */ + + ehci->rh_state = EHCI_RH_SUSPENDED; + spin_unlock_irq(&ehci->lock); + + return 1; +} +EXPORT_SYMBOL_GPL(ehci_resume); + +#endif /*-------------------------------------------------------------------------*/ -#define DRIVER_INFO DRIVER_VERSION " " DRIVER_DESC +/* + * Generic structure: This gets copied for platform drivers so that + * individual entries can be overridden as needed. + */ + +static const struct hc_driver ehci_hc_driver = { + .description = hcd_name, + .product_desc = "EHCI Host Controller", + .hcd_priv_size = sizeof(struct ehci_hcd), -MODULE_DESCRIPTION (DRIVER_INFO); + /* + * generic hardware linkage + */ + .irq = ehci_irq, + .flags = HCD_MEMORY | HCD_USB2 | HCD_BH, + + /* + * basic lifecycle operations + */ + .reset = ehci_setup, + .start = ehci_run, + .stop = ehci_stop, + .shutdown = ehci_shutdown, + + /* + * managing i/o requests and associated device resources + */ + .urb_enqueue = ehci_urb_enqueue, + .urb_dequeue = ehci_urb_dequeue, + .endpoint_disable = ehci_endpoint_disable, + .endpoint_reset = ehci_endpoint_reset, + .clear_tt_buffer_complete = ehci_clear_tt_buffer_complete, + + /* + * scheduling support + */ + .get_frame_number = ehci_get_frame, + + /* + * root hub support + */ + .hub_status_data = ehci_hub_status_data, + .hub_control = ehci_hub_control, + .bus_suspend = ehci_bus_suspend, + .bus_resume = ehci_bus_resume, + .relinquish_port = ehci_relinquish_port, + .port_handed_over = ehci_port_handed_over, + + /* + * device support + */ + .free_dev = ehci_remove_device, +}; + +void ehci_init_driver(struct hc_driver *drv, + const struct ehci_driver_overrides *over) +{ + /* Copy the generic table to drv and then apply the overrides */ + *drv = ehci_hc_driver; + + if (over) { + drv->hcd_priv_size += over->extra_priv_size; + if (over->reset) + drv->reset = over->reset; + } +} +EXPORT_SYMBOL_GPL(ehci_init_driver); + +/*-------------------------------------------------------------------------*/ + +MODULE_DESCRIPTION(DRIVER_DESC); MODULE_AUTHOR (DRIVER_AUTHOR); MODULE_LICENSE ("GPL"); -#ifdef CONFIG_PCI -#include "ehci-pci.c" +#ifdef CONFIG_USB_EHCI_FSL +#include "ehci-fsl.c" +#define PLATFORM_DRIVER ehci_fsl_driver +#endif + +#ifdef CONFIG_USB_EHCI_SH +#include "ehci-sh.c" +#define PLATFORM_DRIVER ehci_hcd_sh_driver +#endif + +#ifdef CONFIG_PPC_PS3 +#include "ehci-ps3.c" +#define PS3_SYSTEM_BUS_DRIVER ps3_ehci_driver +#endif + +#ifdef CONFIG_USB_EHCI_HCD_PPC_OF +#include "ehci-ppc-of.c" +#define OF_PLATFORM_DRIVER ehci_hcd_ppc_of_driver +#endif + +#ifdef CONFIG_XPS_USB_HCD_XILINX +#include "ehci-xilinx-of.c" +#define XILINX_OF_PLATFORM_DRIVER ehci_hcd_xilinx_of_driver +#endif + +#ifdef CONFIG_USB_OCTEON_EHCI +#include "ehci-octeon.c" +#define PLATFORM_DRIVER ehci_octeon_driver +#endif + +#ifdef CONFIG_TILE_USB +#include "ehci-tilegx.c" +#define PLATFORM_DRIVER ehci_hcd_tilegx_driver +#endif + +#ifdef CONFIG_USB_EHCI_HCD_PMC_MSP +#include "ehci-pmcmsp.c" +#define PLATFORM_DRIVER ehci_hcd_msp_driver +#endif + +#ifdef CONFIG_SPARC_LEON +#include "ehci-grlib.c" +#define PLATFORM_DRIVER ehci_grlib_driver +#endif + +#ifdef CONFIG_USB_EHCI_MV +#include "ehci-mv.c" +#define PLATFORM_DRIVER ehci_mv_driver +#endif + +#ifdef CONFIG_MIPS_SEAD3 +#include "ehci-sead3.c" +#define PLATFORM_DRIVER ehci_hcd_sead3_driver +#endif + +static int __init ehci_hcd_init(void) +{ + int retval = 0; + + if (usb_disabled()) + return -ENODEV; + + printk(KERN_INFO "%s: " DRIVER_DESC "\n", hcd_name); + set_bit(USB_EHCI_LOADED, &usb_hcds_loaded); + if (test_bit(USB_UHCI_LOADED, &usb_hcds_loaded) || + test_bit(USB_OHCI_LOADED, &usb_hcds_loaded)) + printk(KERN_WARNING "Warning! ehci_hcd should always be loaded" + " before uhci_hcd and ohci_hcd, not after\n"); + + pr_debug("%s: block sizes: qh %Zd qtd %Zd itd %Zd sitd %Zd\n", + hcd_name, + sizeof(struct ehci_qh), sizeof(struct ehci_qtd), + sizeof(struct ehci_itd), sizeof(struct ehci_sitd)); + +#ifdef CONFIG_DYNAMIC_DEBUG + ehci_debug_root = debugfs_create_dir("ehci", usb_debug_root); + if (!ehci_debug_root) { + retval = -ENOENT; + goto err_debug; + } +#endif + +#ifdef PLATFORM_DRIVER + retval = platform_driver_register(&PLATFORM_DRIVER); + if (retval < 0) + goto clean0; +#endif + +#ifdef PS3_SYSTEM_BUS_DRIVER + retval = ps3_ehci_driver_register(&PS3_SYSTEM_BUS_DRIVER); + if (retval < 0) + goto clean2; +#endif + +#ifdef OF_PLATFORM_DRIVER + retval = platform_driver_register(&OF_PLATFORM_DRIVER); + if (retval < 0) + goto clean3; +#endif + +#ifdef XILINX_OF_PLATFORM_DRIVER + retval = platform_driver_register(&XILINX_OF_PLATFORM_DRIVER); + if (retval < 0) + goto clean4; +#endif + return retval; + +#ifdef XILINX_OF_PLATFORM_DRIVER + /* platform_driver_unregister(&XILINX_OF_PLATFORM_DRIVER); */ +clean4: #endif +#ifdef OF_PLATFORM_DRIVER + platform_driver_unregister(&OF_PLATFORM_DRIVER); +clean3: +#endif +#ifdef PS3_SYSTEM_BUS_DRIVER + ps3_ehci_driver_unregister(&PS3_SYSTEM_BUS_DRIVER); +clean2: +#endif +#ifdef PLATFORM_DRIVER + platform_driver_unregister(&PLATFORM_DRIVER); +clean0: +#endif +#ifdef CONFIG_DYNAMIC_DEBUG + debugfs_remove(ehci_debug_root); + ehci_debug_root = NULL; +err_debug: +#endif + clear_bit(USB_EHCI_LOADED, &usb_hcds_loaded); + return retval; +} +module_init(ehci_hcd_init); -#if !defined(CONFIG_PCI) -#error "missing bus glue for ehci-hcd" +static void __exit ehci_hcd_cleanup(void) +{ +#ifdef XILINX_OF_PLATFORM_DRIVER + platform_driver_unregister(&XILINX_OF_PLATFORM_DRIVER); +#endif +#ifdef OF_PLATFORM_DRIVER + platform_driver_unregister(&OF_PLATFORM_DRIVER); +#endif +#ifdef PLATFORM_DRIVER + platform_driver_unregister(&PLATFORM_DRIVER); #endif +#ifdef PS3_SYSTEM_BUS_DRIVER + ps3_ehci_driver_unregister(&PS3_SYSTEM_BUS_DRIVER); +#endif +#ifdef CONFIG_DYNAMIC_DEBUG + debugfs_remove(ehci_debug_root); +#endif + clear_bit(USB_EHCI_LOADED, &usb_hcds_loaded); +} +module_exit(ehci_hcd_cleanup); |