/*
- * OHCI HCD (Host Controller Driver) for USB.
+ * ADM5120 HCD (Host Controller Driver) for USB
*
- * (C) Copyright 1999 Roman Weissgaerber <weissg@vienna.at>
- * (C) Copyright 2000-2004 David Brownell <dbrownell@users.sourceforge.net>
+ * Copyright (C) 2007,2008 Gabor Juhos <juhosg at openwrt.org>
*
- * [ Initialisation is based on Linus' ]
- * [ uhci code and gregs ahcd fragments ]
- * [ (C) Copyright 1999 Linus Torvalds ]
- * [ (C) Copyright 1999 Gregory P. Smith]
+ * This file was derived from: drivers/usb/host/ohci-hcd.c
+ * (C) Copyright 1999 Roman Weissgaerber <weissg@vienna.at>
+ * (C) Copyright 2000-2004 David Brownell <dbrownell@users.sourceforge.net>
*
+ * [ Initialisation is based on Linus' ]
+ * [ uhci code and gregs ahcd fragments ]
+ * [ (C) Copyright 1999 Linus Torvalds ]
+ * [ (C) Copyright 1999 Gregory P. Smith]
*
- * OHCI is the main "non-Intel/VIA" standard for USB 1.1 host controller
- * interfaces (though some non-x86 Intel chips use it). It supports
- * smarter hardware than UHCI. A download link for the spec available
- * through the http://www.usb.org website.
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published
+ * by the Free Software Foundation.
*
- * This file is licenced under the GPL.
*/
#include <linux/module.h>
#include <linux/dma-mapping.h>
#include <linux/dmapool.h>
#include <linux/reboot.h>
+#include <linux/debugfs.h>
#include <asm/io.h>
#include <asm/irq.h>
#include "../core/hcd.h"
#include "../core/hub.h"
-#define DRIVER_VERSION "v0.04"
+#define DRIVER_VERSION "0.25.0"
#define DRIVER_AUTHOR "Gabor Juhos <juhosg at openwrt.org>"
#define DRIVER_DESC "ADMtek USB 1.1 Host Controller Driver"
/*-------------------------------------------------------------------------*/
-#define ADMHC_VERBOSE_DEBUG /* not always helpful */
-#define ADMHC_POLL_RH
-#undef ADMHC_LOCK_DMA
+#undef ADMHC_VERBOSE_DEBUG /* not always helpful */
/* For initializing controller (mask in an HCFS mode too) */
#define OHCI_CONTROL_INIT OHCI_CTRL_CBSR
/*
* queue up an urb for anything except the root hub
*/
-static int admhc_urb_enqueue(struct usb_hcd *hcd, struct usb_host_endpoint *ep,
- struct urb *urb, gfp_t mem_flags)
+static int admhc_urb_enqueue(struct usb_hcd *hcd, struct urb *urb,
+ gfp_t mem_flags)
{
struct admhcd *ahcd = hcd_to_admhcd(hcd);
struct ed *ed;
#ifdef ADMHC_VERBOSE_DEBUG
spin_lock_irqsave(&ahcd->lock, flags);
- urb_print(ahcd, urb, "ENQEUE", usb_pipein(pipe));
+ urb_print(ahcd, urb, "ENQEUE", usb_pipein(pipe), -EINPROGRESS);
spin_unlock_irqrestore(&ahcd->lock, flags);
#endif
/* every endpoint has an ed, locate and maybe (re)initialize it */
- ed = ed_get(ahcd, ep, urb->dev, pipe, urb->interval);
+ ed = ed_get(ahcd, urb->ep, urb->dev, pipe, urb->interval);
if (!ed)
return -ENOMEM;
/* 1 TD for setup, 1 for ACK, plus ... */
td_cnt = 2;
- if (urb->transfer_buffer_length)
- td_cnt++;
- break;
+ /* FALLTHROUGH */
case PIPE_BULK:
/* one TD for every 4096 Bytes (can be upto 8K) */
- td_cnt = urb->transfer_buffer_length / TD_DATALEN_MAX;
+ td_cnt += urb->transfer_buffer_length / TD_DATALEN_MAX;
/* ... and for any remaining bytes ... */
if ((urb->transfer_buffer_length % TD_DATALEN_MAX) != 0)
td_cnt++;
/* number of packets from URB */
td_cnt = urb->number_of_packets;
break;
- default:
- /* paranoia */
- admhc_err(ahcd, "bad EP type %d", ed->type);
- return -EINVAL;
}
urb_priv = urb_priv_alloc(ahcd, td_cnt, mem_flags);
return -ENOMEM;
urb_priv->ed = ed;
- urb_priv->urb = urb;
spin_lock_irqsave(&ahcd->lock, flags);
/* don't submit to a dead HC */
goto fail;
}
- /* in case of unlink-during-submit */
- spin_lock(&urb->lock);
- if (urb->status != -EINPROGRESS) {
- spin_unlock(&urb->lock);
- urb->hcpriv = urb_priv;
- finish_urb(ahcd, urb);
- ret = 0;
+ ret = usb_hcd_link_urb_to_ep(hcd, urb);
+ if (ret)
goto fail;
- }
- if (ed->type == PIPE_ISOCHRONOUS) {
- if (ed->state == ED_NEW) {
+ /* schedule the ed if needed */
+ if (ed->state == ED_IDLE) {
+ ret = ed_schedule(ahcd, ed);
+ if (ret < 0) {
+ usb_hcd_unlink_urb_from_ep(hcd, urb);
+ goto fail;
+ }
+ if (ed->type == PIPE_ISOCHRONOUS) {
u16 frame = admhc_frame_no(ahcd);
/* delay a few frames before the first TD */
/* yes, only URB_ISO_ASAP is supported, and
* urb->start_frame is never used as input.
*/
- } else
- urb->start_frame = ed->last_iso + ed->interval;
- }
+ }
+ } else if (ed->type == PIPE_ISOCHRONOUS)
+ urb->start_frame = ed->last_iso + ed->interval;
+ /* fill the TDs and link them to the ed; and
+ * enable that part of the schedule, if needed
+ * and update count of queued periodic urbs
+ */
urb->hcpriv = urb_priv;
- td_submit_urb(ahcd, urb_priv->urb);
+ td_submit_urb(ahcd, urb);
- /* append it to the ED's queue */
- list_add_tail(&urb_priv->pending, &ed->urb_pending);
-
- /* schedule the ED */
- ret = ed_schedule(ahcd, ed);
+#ifdef ADMHC_VERBOSE_DEBUG
+ admhc_dump_ed(ahcd, "admhc_urb_enqueue", urb_priv->ed, 1);
+#endif
-fail0:
- spin_unlock(&urb->lock);
fail:
- if (ret) {
- urb_priv = urb->hcpriv;
+ if (ret)
urb_priv_free(ahcd, urb_priv);
- }
spin_unlock_irqrestore(&ahcd->lock, flags);
return ret;
}
/*
- * decouple the URB from the HC queues (TDs, urb_priv); it's
- * already marked using urb->status. reporting is always done
+ * decouple the URB from the HC queues (TDs, urb_priv);
+ * reporting is always done
* asynchronously, and we might be dealing with an urb that's
* partially transferred, or an ED with other urbs being unlinked.
*/
-static int admhc_urb_dequeue(struct usb_hcd *hcd, struct urb *urb)
+static int admhc_urb_dequeue(struct usb_hcd *hcd, struct urb *urb,
+ int status)
{
struct admhcd *ahcd = hcd_to_admhcd(hcd);
- struct urb_priv *up;
unsigned long flags;
-
- up = urb->hcpriv;
- if (!up)
- return 0;
+ int ret;
spin_lock_irqsave(&ahcd->lock, flags);
#ifdef ADMHC_VERBOSE_DEBUG
- urb_print(ahcd, urb, "DEQEUE", 1);
+ urb_print(ahcd, urb, "DEQUEUE", 1, status);
#endif
+ ret = usb_hcd_check_unlink_urb(hcd, urb, status);
+ if (ret) {
+ /* Do nothing */
+ ;
+ } else if (HC_IS_RUNNING(hcd->state)) {
+ struct urb_priv *urb_priv;
- if (HC_IS_RUNNING(hcd->state)) {
/* Unless an IRQ completed the unlink while it was being
* handed to us, flag it for unlink and giveback, and force
* some upcoming INTR_SF to call finish_unlinks()
*/
- if (up->ed->urb_active != up) {
- list_del(&up->pending);
- finish_urb(ahcd, urb);
- } else {
- ed_start_deschedule(ahcd, up->ed);
+ urb_priv = urb->hcpriv;
+ if (urb_priv) {
+ if (urb_priv->ed->state == ED_OPER)
+ start_ed_unlink(ahcd, urb_priv->ed);
}
} else {
/*
* with HC dead, we won't respect hc queue pointers
* any more ... just clean up every urb's memory.
*/
- if (up->ed->urb_active != up) {
- list_del(&up->pending);
- finish_urb(ahcd, urb);
- } else {
- finish_urb(ahcd, urb);
- up->ed->urb_active = NULL;
- up->ed->state = ED_IDLE;
- }
+ if (urb->hcpriv)
+ finish_urb(ahcd, urb, status);
}
spin_unlock_irqrestore(&ahcd->lock, flags);
- return 0;
+ return ret;
}
/*-------------------------------------------------------------------------*/
/* frees config/altsetting state for endpoints,
* including ED memory, dummy TD, and bulk/intr data toggle
*/
+
static void admhc_endpoint_disable(struct usb_hcd *hcd,
struct usb_host_endpoint *ep)
{
if (!HC_IS_RUNNING(hcd->state)) {
sanitize:
- ed->state = ED_UNLINK;
- admhc_finish_unlinks(ahcd, 0);
+ ed->state = ED_IDLE;
+ finish_unlinks(ahcd, 0);
}
switch (ed->state) {
spin_unlock_irqrestore(&ahcd->lock, flags);
schedule_timeout_uninterruptible(1);
goto rescan;
- case ED_IDLE:
- case ED_NEW: /* fully unlinked */
- if (list_empty(&ed->urb_pending)) {
- td_free(ahcd, ed->dummy);
- ed_free(ahcd, ed);
+ case ED_IDLE: /* fully unlinked */
+ if (list_empty(&ed->td_list)) {
+ td_free (ahcd, ed->dummy);
+ ed_free (ahcd, ed);
break;
}
/* else FALL THROUGH */
/* caller was supposed to have unlinked any requests;
* that's not our job. can't recover; must leak ed.
*/
- admhc_err(ahcd, "leak ed %p (#%02x) %s act %p%s\n",
- ed, ep->desc.bEndpointAddress,
- ed_statestring(ed->state),
- ed->urb_active,
- list_empty(&ed->urb_pending) ? "" : " (has urbs)");
+ admhc_err(ahcd, "leak ed %p (#%02x) state %d%s\n",
+ ed, ep->desc.bEndpointAddress, ed->state,
+ list_empty(&ed->td_list) ? "" : " (has tds)");
+ td_free(ahcd, ed->dummy);
break;
}
static void admhc_usb_reset(struct admhcd *ahcd)
{
+#if 0
+ ahcd->hc_control = admhc_readl(ahcd, &ahcd->regs->control);
+ ahcd->hc_control &= OHCI_CTRL_RWC;
+ admhc_writel(ahcd, ahcd->hc_control, &ahcd->regs->control);
+#else
+ /* FIXME */
ahcd->host_control = ADMHC_BUSS_RESET;
- admhc_writel(ahcd, ahcd->host_control, &ahcd->regs->host_control);
+ admhc_writel(ahcd, ahcd->host_control ,&ahcd->regs->host_control);
+#endif
}
/* admhc_shutdown forcibly disables IRQs and DMA, helping kexec and
admhc_intr_disable(ahcd, ADMHC_INTR_MIE);
admhc_dma_disable(ahcd);
admhc_usb_reset(ahcd);
+ /* flush the writes */
+ admhc_writel_flush(ahcd);
}
/*-------------------------------------------------------------------------*
/* also: power/overcurrent flags in rhdesc */
}
+#if 0 /* TODO: not applicable */
+ /* Reset USB nearly "by the book". RemoteWakeupConnected was
+ * saved if boot firmware (BIOS/SMM/...) told us it's connected,
+ * or if bus glue did the same (e.g. for PCI add-in cards with
+ * PCI PM support).
+ */
+ if ((ahcd->hc_control & OHCI_CTRL_RWC) != 0
+ && !device_may_wakeup(hcd->self.controller))
+ device_init_wakeup(hcd->self.controller, 1);
+#endif
+
switch (ahcd->host_control & ADMHC_HC_BUSS) {
case ADMHC_BUSS_OPER:
temp = 0;
}
admhc_writel(ahcd, ahcd->host_control, &ahcd->regs->host_control);
+ /* flush the writes */
+ admhc_writel_flush(ahcd);
+
msleep(temp);
temp = admhc_read_rhdesc(ahcd);
if (!(temp & ADMHC_RH_NPS)) {
for (temp = 0; temp < ahcd->num_ports; temp++)
admhc_write_portstatus(ahcd, temp, ADMHC_PS_CPP);
}
+ /* flush those writes */
+ admhc_writel_flush(ahcd);
/* 2msec timelimit here means no irqs/preempt */
spin_lock_irq(&ahcd->lock);
admhc_err(ahcd, "USB HC reset timed out!\n");
return -1;
}
- udelay (1);
+ udelay(1);
}
/* enable HOST mode, before access any host specific register */
admhc_writel(ahcd, ADMHC_RH_NPS | ADMHC_RH_LPSC, &ahcd->regs->rhdesc);
+ /* flush those writes */
+ admhc_writel_flush(ahcd);
+
/* start controller operations */
ahcd->host_control = ADMHC_BUSS_OPER;
admhc_writel(ahcd, ahcd->host_control, &ahcd->regs->host_control);
}
hcd->state = HC_STATE_RUNNING;
+
ahcd->next_statechange = jiffies + STATECHANGE_DELAY;
+#if 0
+ /* FIXME: enabling DMA is always failed here for an unknown reason */
+ admhc_dma_enable(ahcd);
+
+ temp = 200;
+ while ((admhc_readl(ahcd, &ahcd->regs->host_control)
+ & ADMHC_HC_DMAE) != ADMHC_HC_DMAE) {
+ if (--temp == 0) {
+ spin_unlock_irq(&ahcd->lock);
+ admhc_err(ahcd, "unable to enable DMA!\n");
+ admhc_dump(ahcd, 1);
+ return -1;
+ }
+ mdelay(1);
+ }
+
+#endif
+
spin_unlock_irq(&ahcd->lock);
mdelay(ADMHC_POTPGT);
u32 ints;
ints = admhc_readl(ahcd, ®s->int_status);
- if (!(ints & ADMHC_INTR_INTA))
+ if ((ints & ADMHC_INTR_INTA) == 0) {
/* no unmasked interrupt status is set */
return IRQ_NONE;
+ }
ints &= admhc_readl(ahcd, ®s->int_enable);
- if (!ints)
- return IRQ_NONE;
if (ints & ADMHC_INTR_FATI) {
+ /* e.g. due to PCI Master/Target Abort */
admhc_disable(ahcd);
admhc_err(ahcd, "Fatal Error, controller disabled\n");
+ admhc_dump(ahcd, 1);
admhc_usb_reset(ahcd);
}
if (ints & ADMHC_INTR_BABI) {
- admhc_disable(ahcd);
+ admhc_intr_disable(ahcd, ADMHC_INTR_BABI);
+ admhc_intr_ack(ahcd, ADMHC_INTR_BABI);
admhc_err(ahcd, "Babble Detected\n");
- admhc_usb_reset(ahcd);
}
if (ints & ADMHC_INTR_INSM) {
admhc_intr_ack(ahcd, ADMHC_INTR_RESI);
hcd->poll_rh = 1;
if (ahcd->autostop) {
+ spin_lock(&ahcd->lock);
admhc_rh_resume(ahcd);
+ spin_unlock(&ahcd->lock);
} else
usb_hcd_resume_root_hub(hcd);
}
if (ints & ADMHC_INTR_TDC) {
+ admhc_vdbg(ahcd, "Transfer Descriptor Complete\n");
admhc_intr_ack(ahcd, ADMHC_INTR_TDC);
if (HC_IS_RUNNING(hcd->state))
admhc_intr_disable(ahcd, ADMHC_INTR_TDC);
- admhc_vdbg(ahcd, "Transfer Descriptor Complete\n");
spin_lock(&ahcd->lock);
admhc_td_complete(ahcd);
spin_unlock(&ahcd->lock);
admhc_vdbg(ahcd, "Schedule Overrun\n");
}
+#if 1
+ spin_lock(&ahcd->lock);
+ if (ahcd->ed_rm_list)
+ finish_unlinks(ahcd, admhc_frame_no(ahcd));
+
+ if ((ints & ADMHC_INTR_SOFI) != 0 && !ahcd->ed_rm_list
+ && HC_IS_RUNNING(hcd->state))
+ admhc_intr_disable(ahcd, ADMHC_INTR_SOFI);
+ spin_unlock(&ahcd->lock);
+#else
if (ints & ADMHC_INTR_SOFI) {
- admhc_intr_ack(ahcd, ADMHC_INTR_SOFI);
+ admhc_vdbg(ahcd, "Start Of Frame\n");
spin_lock(&ahcd->lock);
+
/* handle any pending ED removes */
- admhc_finish_unlinks(ahcd, admhc_frame_no(ahcd));
- admhc_sof_refill(ahcd);
+ finish_unlinks(ahcd, admhc_frameno(ahcd));
+
+ /* leaving INTR_SOFI enabled when there's still unlinking
+ * to be done in the (next frame).
+ */
+ if ((ahcd->ed_rm_list == NULL) ||
+ HC_IS_RUNNING(hcd->state) == 0)
+ /*
+ * disable INTR_SOFI if there are no unlinking to be
+ * done (in the next frame)
+ */
+ admhc_intr_disable(ahcd, ADMHC_INTR_SOFI);
+
spin_unlock(&ahcd->lock);
}
+#endif
if (HC_IS_RUNNING(hcd->state)) {
admhc_intr_ack(ahcd, ints);
admhc_intr_enable(ahcd, ADMHC_INTR_MIE);
+ admhc_writel_flush(ahcd);
}
return IRQ_HANDLED;
flush_scheduled_work();
admhc_usb_reset(ahcd);
- admhc_intr_disable(ahcd, ~0);
+ admhc_intr_disable(ahcd, ADMHC_INTR_MIE);
free_irq(hcd->irq, hcd);
hcd->irq = -1;
#error "missing bus glue for admhc-hcd"
#endif
-#define DRIVER_INFO DRIVER_DESC " " DRIVER_VERSION
+#define DRIVER_INFO DRIVER_DESC " version " DRIVER_VERSION
static int __init admhc_hcd_mod_init(void)
{
pr_info("%s: block sizes: ed %Zd td %Zd\n", hcd_name,
sizeof (struct ed), sizeof (struct td));
+#ifdef DEBUG
+ admhc_debug_root = debugfs_create_dir("admhc", NULL);
+ if (!admhc_debug_root) {
+ ret = -ENOENT;
+ goto error_debug;
+ }
+#endif
+
#ifdef PLATFORM_DRIVER
ret = platform_driver_register(&PLATFORM_DRIVER);
if (ret < 0)
#ifdef PLATFORM_DRIVER
platform_driver_unregister(&PLATFORM_DRIVER);
error_platform:
+#endif
+
+#ifdef DEBUG
+ debugfs_remove(admhc_debug_root);
+ admhc_debug_root = NULL;
+error_debug:
#endif
return ret;
}
static void __exit admhc_hcd_mod_exit(void)
{
platform_driver_unregister(&PLATFORM_DRIVER);
+#ifdef DEBUG
+ debugfs_remove(admhc_debug_root);
+#endif
}
module_exit(admhc_hcd_mod_exit);
MODULE_AUTHOR(DRIVER_AUTHOR);
MODULE_DESCRIPTION(DRIVER_INFO);
-MODULE_LICENSE("GPL");
+MODULE_VERSION(DRIVER_VERSION);
+MODULE_LICENSE("GPL v2");
projects / openwrt.git / blobdiff