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linux/drivers/usb/host/isp1362-hcd.c
Linus Torvalds e945716538 Merge branch 'usb-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb-2.6 
* 'usb-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb-2.6:
  USB: EHCI: fix obscure race in ehci_endpoint_disable
  USB: gadget: AT91: fix typo in atmel_usba_udc driver
  USB: isp1362-hcd - fix section mismatch warning
  USB: EHCI: AMD periodic frame list table quirk
  USB: OTG: langwell_otg: fix up some sysfs attribute permissions
  USB: misc: usbsevseg: fix up some sysfs attribute permissions
  USB: misc: usbled: fix up some sysfs attribute permissions
  USB: misc: trancevibrator: fix up a sysfs attribute permission
  USB: misc: cypress_cy7c63: fix up some sysfs attribute permissions
  USB: storage: sierra_ms: fix sysfs file attribute
  USB: ehci: fix debugfs 'lpm' permissions
  USB: atm: ueagle-atm: fix up some permissions on the sysfs files
  xhci: Fix command ring replay after resume.
  xHCI: fix wMaxPacketSize mask
  xHCI: release spinlock when setup interrupt
  xhci: Remove excessive printks with shared IRQs.
2010-11-24 08:21:43 +09:00

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/*
* ISP1362 HCD (Host Controller Driver) for USB.
*
* Copyright (C) 2005 Lothar Wassmann <LW@KARO-electronics.de>
*
* Derived from the SL811 HCD, rewritten for ISP116x.
* Copyright (C) 2005 Olav Kongas <ok@artecdesign.ee>
*
* Portions:
* Copyright (C) 2004 Psion Teklogix (for NetBook PRO)
* Copyright (C) 2004 David Brownell
*/
/*
* The ISP1362 chip requires a large delay (300ns and 462ns) between
* accesses to the address and data register.
* The following timing options exist:
*
* 1. Configure your memory controller to add such delays if it can (the best)
* 2. Implement platform-specific delay function possibly
* combined with configuring the memory controller; see
* include/linux/usb_isp1362.h for more info.
* 3. Use ndelay (easiest, poorest).
*
* Use the corresponding macros USE_PLATFORM_DELAY and USE_NDELAY in the
* platform specific section of isp1362.h to select the appropriate variant.
*
* Also note that according to the Philips "ISP1362 Errata" document
* Rev 1.00 from 27 May data corruption may occur when the #WR signal
* is reasserted (even with #CS deasserted) within 132ns after a
* write cycle to any controller register. If the hardware doesn't
* implement the recommended fix (gating the #WR with #CS) software
* must ensure that no further write cycle (not necessarily to the chip!)
* is issued by the CPU within this interval.
* For PXA25x this can be ensured by using VLIO with the maximum
* recovery time (MSCx = 0x7f8c) with a memory clock of 99.53 MHz.
*/
#ifdef CONFIG_USB_DEBUG
# define ISP1362_DEBUG
#else
# undef ISP1362_DEBUG
#endif
/*
* The PXA255 UDC apparently doesn't handle GET_STATUS, GET_CONFIG and
* GET_INTERFACE requests correctly when the SETUP and DATA stages of the
* requests are carried out in separate frames. This will delay any SETUP
* packets until the start of the next frame so that this situation is
* unlikely to occur (and makes usbtest happy running with a PXA255 target
* device).
*/
#undef BUGGY_PXA2XX_UDC_USBTEST
#undef PTD_TRACE
#undef URB_TRACE
#undef VERBOSE
#undef REGISTERS
/* This enables a memory test on the ISP1362 chip memory to make sure the
* chip access timing is correct.
*/
#undef CHIP_BUFFER_TEST
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/kernel.h>
#include <linux/delay.h>
#include <linux/ioport.h>
#include <linux/sched.h>
#include <linux/slab.h>
#include <linux/errno.h>
#include <linux/init.h>
#include <linux/list.h>
#include <linux/interrupt.h>
#include <linux/usb.h>
#include <linux/usb/isp1362.h>
#include <linux/usb/hcd.h>
#include <linux/platform_device.h>
#include <linux/pm.h>
#include <linux/io.h>
#include <linux/bitmap.h>
#include <asm/irq.h>
#include <asm/system.h>
#include <asm/byteorder.h>
#include <asm/unaligned.h>
static int dbg_level;
#ifdef ISP1362_DEBUG
module_param(dbg_level, int, 0644);
#else
module_param(dbg_level, int, 0);
#define STUB_DEBUG_FILE
#endif
#include "../core/usb.h"
#include "isp1362.h"
#define DRIVER_VERSION "2005-04-04"
#define DRIVER_DESC "ISP1362 USB Host Controller Driver"
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_LICENSE("GPL");
static const char hcd_name[] = "isp1362-hcd";
static void isp1362_hc_stop(struct usb_hcd *hcd);
static int isp1362_hc_start(struct usb_hcd *hcd);
/*-------------------------------------------------------------------------*/
/*
* When called from the interrupthandler only isp1362_hcd->irqenb is modified,
* since the interrupt handler will write isp1362_hcd->irqenb to HCuPINT upon
* completion.
* We don't need a 'disable' counterpart, since interrupts will be disabled
* only by the interrupt handler.
*/
static inline void isp1362_enable_int(struct isp1362_hcd *isp1362_hcd, u16 mask)
{
if ((isp1362_hcd->irqenb | mask) == isp1362_hcd->irqenb)
return;
if (mask & ~isp1362_hcd->irqenb)
isp1362_write_reg16(isp1362_hcd, HCuPINT, mask & ~isp1362_hcd->irqenb);
isp1362_hcd->irqenb |= mask;
if (isp1362_hcd->irq_active)
return;
isp1362_write_reg16(isp1362_hcd, HCuPINTENB, isp1362_hcd->irqenb);
}
/*-------------------------------------------------------------------------*/
static inline struct isp1362_ep_queue *get_ptd_queue(struct isp1362_hcd *isp1362_hcd,
u16 offset)
{
struct isp1362_ep_queue *epq = NULL;
if (offset < isp1362_hcd->istl_queue[1].buf_start)
epq = &isp1362_hcd->istl_queue[0];
else if (offset < isp1362_hcd->intl_queue.buf_start)
epq = &isp1362_hcd->istl_queue[1];
else if (offset < isp1362_hcd->atl_queue.buf_start)
epq = &isp1362_hcd->intl_queue;
else if (offset < isp1362_hcd->atl_queue.buf_start +
isp1362_hcd->atl_queue.buf_size)
epq = &isp1362_hcd->atl_queue;
if (epq)
DBG(1, "%s: PTD $%04x is on %s queue\n", __func__, offset, epq->name);
else
pr_warning("%s: invalid PTD $%04x\n", __func__, offset);
return epq;
}
static inline int get_ptd_offset(struct isp1362_ep_queue *epq, u8 index)
{
int offset;
if (index * epq->blk_size > epq->buf_size) {
pr_warning("%s: Bad %s index %d(%d)\n", __func__, epq->name, index,
epq->buf_size / epq->blk_size);
return -EINVAL;
}
offset = epq->buf_start + index * epq->blk_size;
DBG(3, "%s: %s PTD[%02x] # %04x\n", __func__, epq->name, index, offset);
return offset;
}
/*-------------------------------------------------------------------------*/
static inline u16 max_transfer_size(struct isp1362_ep_queue *epq, size_t size,
int mps)
{
u16 xfer_size = min_t(size_t, MAX_XFER_SIZE, size);
xfer_size = min_t(size_t, xfer_size, epq->buf_avail * epq->blk_size - PTD_HEADER_SIZE);
if (xfer_size < size && xfer_size % mps)
xfer_size -= xfer_size % mps;
return xfer_size;
}
static int claim_ptd_buffers(struct isp1362_ep_queue *epq,
struct isp1362_ep *ep, u16 len)
{
int ptd_offset = -EINVAL;
int num_ptds = ((len + PTD_HEADER_SIZE - 1) / epq->blk_size) + 1;
int found;
BUG_ON(len > epq->buf_size);
if (!epq->buf_avail)
return -ENOMEM;
if (ep->num_ptds)
pr_err("%s: %s len %d/%d num_ptds %d buf_map %08lx skip_map %08lx\n", __func__,
epq->name, len, epq->blk_size, num_ptds, epq->buf_map, epq->skip_map);
BUG_ON(ep->num_ptds != 0);
found = bitmap_find_next_zero_area(&epq->buf_map, epq->buf_count, 0,
num_ptds, 0);
if (found >= epq->buf_count)
return -EOVERFLOW;
DBG(1, "%s: Found %d PTDs[%d] for %d/%d byte\n", __func__,
num_ptds, found, len, (int)(epq->blk_size - PTD_HEADER_SIZE));
ptd_offset = get_ptd_offset(epq, found);
WARN_ON(ptd_offset < 0);
ep->ptd_offset = ptd_offset;
ep->num_ptds += num_ptds;
epq->buf_avail -= num_ptds;
BUG_ON(epq->buf_avail > epq->buf_count);
ep->ptd_index = found;
bitmap_set(&epq->buf_map, found, num_ptds);
DBG(1, "%s: Done %s PTD[%d] $%04x, avail %d count %d claimed %d %08lx:%08lx\n",
__func__, epq->name, ep->ptd_index, ep->ptd_offset,
epq->buf_avail, epq->buf_count, num_ptds, epq->buf_map, epq->skip_map);
return found;
}
static inline void release_ptd_buffers(struct isp1362_ep_queue *epq, struct isp1362_ep *ep)
{
int index = ep->ptd_index;
int last = ep->ptd_index + ep->num_ptds;
if (last > epq->buf_count)
pr_err("%s: ep %p req %d len %d %s PTD[%d] $%04x num_ptds %d buf_count %d buf_avail %d buf_map %08lx skip_map %08lx\n",
__func__, ep, ep->num_req, ep->length, epq->name, ep->ptd_index,
ep->ptd_offset, ep->num_ptds, epq->buf_count, epq->buf_avail,
epq->buf_map, epq->skip_map);
BUG_ON(last > epq->buf_count);
for (; index < last; index++) {
__clear_bit(index, &epq->buf_map);
__set_bit(index, &epq->skip_map);
}
epq->buf_avail += ep->num_ptds;
epq->ptd_count--;
BUG_ON(epq->buf_avail > epq->buf_count);
BUG_ON(epq->ptd_count > epq->buf_count);
DBG(1, "%s: Done %s PTDs $%04x released %d avail %d count %d\n",
__func__, epq->name,
ep->ptd_offset, ep->num_ptds, epq->buf_avail, epq->buf_count);
DBG(1, "%s: buf_map %08lx skip_map %08lx\n", __func__,
epq->buf_map, epq->skip_map);
ep->num_ptds = 0;
ep->ptd_offset = -EINVAL;
ep->ptd_index = -EINVAL;
}
/*-------------------------------------------------------------------------*/
/*
Set up PTD's.
*/
static void prepare_ptd(struct isp1362_hcd *isp1362_hcd, struct urb *urb,
struct isp1362_ep *ep, struct isp1362_ep_queue *epq,
u16 fno)
{
struct ptd *ptd;
int toggle;
int dir;
u16 len;
size_t buf_len = urb->transfer_buffer_length - urb->actual_length;
DBG(3, "%s: %s ep %p\n", __func__, epq->name, ep);
ptd = &ep->ptd;
ep->data = (unsigned char *)urb->transfer_buffer + urb->actual_length;
switch (ep->nextpid) {
case USB_PID_IN:
toggle = usb_gettoggle(urb->dev, ep->epnum, 0);
dir = PTD_DIR_IN;
if (usb_pipecontrol(urb->pipe)) {
len = min_t(size_t, ep->maxpacket, buf_len);
} else if (usb_pipeisoc(urb->pipe)) {
len = min_t(size_t, urb->iso_frame_desc[fno].length, MAX_XFER_SIZE);
ep->data = urb->transfer_buffer + urb->iso_frame_desc[fno].offset;
} else
len = max_transfer_size(epq, buf_len, ep->maxpacket);
DBG(1, "%s: IN len %d/%d/%d from URB\n", __func__, len, ep->maxpacket,
(int)buf_len);
break;
case USB_PID_OUT:
toggle = usb_gettoggle(urb->dev, ep->epnum, 1);
dir = PTD_DIR_OUT;
if (usb_pipecontrol(urb->pipe))
len = min_t(size_t, ep->maxpacket, buf_len);
else if (usb_pipeisoc(urb->pipe))
len = min_t(size_t, urb->iso_frame_desc[0].length, MAX_XFER_SIZE);
else
len = max_transfer_size(epq, buf_len, ep->maxpacket);
if (len == 0)
pr_info("%s: Sending ZERO packet: %d\n", __func__,
urb->transfer_flags & URB_ZERO_PACKET);
DBG(1, "%s: OUT len %d/%d/%d from URB\n", __func__, len, ep->maxpacket,
(int)buf_len);
break;
case USB_PID_SETUP:
toggle = 0;
dir = PTD_DIR_SETUP;
len = sizeof(struct usb_ctrlrequest);
DBG(1, "%s: SETUP len %d\n", __func__, len);
ep->data = urb->setup_packet;
break;
case USB_PID_ACK:
toggle = 1;
len = 0;
dir = (urb->transfer_buffer_length && usb_pipein(urb->pipe)) ?
PTD_DIR_OUT : PTD_DIR_IN;
DBG(1, "%s: ACK len %d\n", __func__, len);
break;
default:
toggle = dir = len = 0;
pr_err("%s@%d: ep->nextpid %02x\n", __func__, __LINE__, ep->nextpid);
BUG_ON(1);
}
ep->length = len;
if (!len)
ep->data = NULL;
ptd->count = PTD_CC_MSK | PTD_ACTIVE_MSK | PTD_TOGGLE(toggle);
ptd->mps = PTD_MPS(ep->maxpacket) | PTD_SPD(urb->dev->speed == USB_SPEED_LOW) |
PTD_EP(ep->epnum);
ptd->len = PTD_LEN(len) | PTD_DIR(dir);
ptd->faddr = PTD_FA(usb_pipedevice(urb->pipe));
if (usb_pipeint(urb->pipe)) {
ptd->faddr |= PTD_SF_INT(ep->branch);
ptd->faddr |= PTD_PR(ep->interval ? __ffs(ep->interval) : 0);
}
if (usb_pipeisoc(urb->pipe))
ptd->faddr |= PTD_SF_ISO(fno);
DBG(1, "%s: Finished\n", __func__);
}
static void isp1362_write_ptd(struct isp1362_hcd *isp1362_hcd, struct isp1362_ep *ep,
struct isp1362_ep_queue *epq)
{
struct ptd *ptd = &ep->ptd;
int len = PTD_GET_DIR(ptd) == PTD_DIR_IN ? 0 : ep->length;
_BUG_ON(ep->ptd_offset < 0);
prefetch(ptd);
isp1362_write_buffer(isp1362_hcd, ptd, ep->ptd_offset, PTD_HEADER_SIZE);
if (len)
isp1362_write_buffer(isp1362_hcd, ep->data,
ep->ptd_offset + PTD_HEADER_SIZE, len);
dump_ptd(ptd);
dump_ptd_out_data(ptd, ep->data);
}
static void isp1362_read_ptd(struct isp1362_hcd *isp1362_hcd, struct isp1362_ep *ep,
struct isp1362_ep_queue *epq)
{
struct ptd *ptd = &ep->ptd;
int act_len;
WARN_ON(list_empty(&ep->active));
BUG_ON(ep->ptd_offset < 0);
list_del_init(&ep->active);
DBG(1, "%s: ep %p removed from active list %p\n", __func__, ep, &epq->active);
prefetchw(ptd);
isp1362_read_buffer(isp1362_hcd, ptd, ep->ptd_offset, PTD_HEADER_SIZE);
dump_ptd(ptd);
act_len = PTD_GET_COUNT(ptd);
if (PTD_GET_DIR(ptd) != PTD_DIR_IN || act_len == 0)
return;
if (act_len > ep->length)
pr_err("%s: ep %p PTD $%04x act_len %d ep->length %d\n", __func__, ep,
ep->ptd_offset, act_len, ep->length);
BUG_ON(act_len > ep->length);
/* Only transfer the amount of data that has actually been overwritten
* in the chip buffer. We don't want any data that doesn't belong to the
* transfer to leak out of the chip to the callers transfer buffer!
*/
prefetchw(ep->data);
isp1362_read_buffer(isp1362_hcd, ep->data,
ep->ptd_offset + PTD_HEADER_SIZE, act_len);
dump_ptd_in_data(ptd, ep->data);
}
/*
* INT PTDs will stay in the chip until data is available.
* This function will remove a PTD from the chip when the URB is dequeued.
* Must be called with the spinlock held and IRQs disabled
*/
static void remove_ptd(struct isp1362_hcd *isp1362_hcd, struct isp1362_ep *ep)
{
int index;
struct isp1362_ep_queue *epq;
DBG(1, "%s: ep %p PTD[%d] $%04x\n", __func__, ep, ep->ptd_index, ep->ptd_offset);
BUG_ON(ep->ptd_offset < 0);
epq = get_ptd_queue(isp1362_hcd, ep->ptd_offset);
BUG_ON(!epq);
/* put ep in remove_list for cleanup */
WARN_ON(!list_empty(&ep->remove_list));
list_add_tail(&ep->remove_list, &isp1362_hcd->remove_list);
/* let SOF interrupt handle the cleanup */
isp1362_enable_int(isp1362_hcd, HCuPINT_SOF);
index = ep->ptd_index;
if (index < 0)
/* ISO queues don't have SKIP registers */
return;
DBG(1, "%s: Disabling PTD[%02x] $%04x %08lx|%08x\n", __func__,
index, ep->ptd_offset, epq->skip_map, 1 << index);
/* prevent further processing of PTD (will be effective after next SOF) */
epq->skip_map |= 1 << index;
if (epq == &isp1362_hcd->atl_queue) {
DBG(2, "%s: ATLSKIP = %08x -> %08lx\n", __func__,
isp1362_read_reg32(isp1362_hcd, HCATLSKIP), epq->skip_map);
isp1362_write_reg32(isp1362_hcd, HCATLSKIP, epq->skip_map);
if (~epq->skip_map == 0)
isp1362_clr_mask16(isp1362_hcd, HCBUFSTAT, HCBUFSTAT_ATL_ACTIVE);
} else if (epq == &isp1362_hcd->intl_queue) {
DBG(2, "%s: INTLSKIP = %08x -> %08lx\n", __func__,
isp1362_read_reg32(isp1362_hcd, HCINTLSKIP), epq->skip_map);
isp1362_write_reg32(isp1362_hcd, HCINTLSKIP, epq->skip_map);
if (~epq->skip_map == 0)
isp1362_clr_mask16(isp1362_hcd, HCBUFSTAT, HCBUFSTAT_INTL_ACTIVE);
}
}
/*
Take done or failed requests out of schedule. Give back
processed urbs.
*/
static void finish_request(struct isp1362_hcd *isp1362_hcd, struct isp1362_ep *ep,
struct urb *urb, int status)
__releases(isp1362_hcd->lock)
__acquires(isp1362_hcd->lock)
{
urb->hcpriv = NULL;
ep->error_count = 0;
if (usb_pipecontrol(urb->pipe))
ep->nextpid = USB_PID_SETUP;
URB_DBG("%s: req %d FA %d ep%d%s %s: len %d/%d %s stat %d\n", __func__,
ep->num_req, usb_pipedevice(urb->pipe),
usb_pipeendpoint(urb->pipe),
!usb_pipein(urb->pipe) ? "out" : "in",
usb_pipecontrol(urb->pipe) ? "ctrl" :
usb_pipeint(urb->pipe) ? "int" :
usb_pipebulk(urb->pipe) ? "bulk" :
"iso",
urb->actual_length, urb->transfer_buffer_length,
!(urb->transfer_flags & URB_SHORT_NOT_OK) ?
"short_ok" : "", urb->status);
usb_hcd_unlink_urb_from_ep(isp1362_hcd_to_hcd(isp1362_hcd), urb);
spin_unlock(&isp1362_hcd->lock);
usb_hcd_giveback_urb(isp1362_hcd_to_hcd(isp1362_hcd), urb, status);
spin_lock(&isp1362_hcd->lock);
/* take idle endpoints out of the schedule right away */
if (!list_empty(&ep->hep->urb_list))
return;
/* async deschedule */
if (!list_empty(&ep->schedule)) {
list_del_init(&ep->schedule);
return;
}
if (ep->interval) {
/* periodic deschedule */
DBG(1, "deschedule qh%d/%p branch %d load %d bandwidth %d -> %d\n", ep->interval,
ep, ep->branch, ep->load,
isp1362_hcd->load[ep->branch],
isp1362_hcd->load[ep->branch] - ep->load);
isp1362_hcd->load[ep->branch] -= ep->load;
ep->branch = PERIODIC_SIZE;
}
}
/*
* Analyze transfer results, handle partial transfers and errors
*/
static void postproc_ep(struct isp1362_hcd *isp1362_hcd, struct isp1362_ep *ep)
{
struct urb *urb = get_urb(ep);
struct usb_device *udev;
struct ptd *ptd;
int short_ok;
u16 len;
int urbstat = -EINPROGRESS;
u8 cc;
DBG(2, "%s: ep %p req %d\n", __func__, ep, ep->num_req);
udev = urb->dev;
ptd = &ep->ptd;
cc = PTD_GET_CC(ptd);
if (cc == PTD_NOTACCESSED) {
pr_err("%s: req %d PTD %p Untouched by ISP1362\n", __func__,
ep->num_req, ptd);
cc = PTD_DEVNOTRESP;
}
short_ok = !(urb->transfer_flags & URB_SHORT_NOT_OK);
len = urb->transfer_buffer_length - urb->actual_length;
/* Data underrun is special. For allowed underrun
we clear the error and continue as normal. For
forbidden underrun we finish the DATA stage
immediately while for control transfer,
we do a STATUS stage.
*/
if (cc == PTD_DATAUNDERRUN) {
if (short_ok) {
DBG(1, "%s: req %d Allowed data underrun short_%sok %d/%d/%d byte\n",
__func__, ep->num_req, short_ok ? "" : "not_",
PTD_GET_COUNT(ptd), ep->maxpacket, len);
cc = PTD_CC_NOERROR;
urbstat = 0;
} else {
DBG(1, "%s: req %d Data Underrun %s nextpid %02x short_%sok %d/%d/%d byte\n",
__func__, ep->num_req,
usb_pipein(urb->pipe) ? "IN" : "OUT", ep->nextpid,
short_ok ? "" : "not_",
PTD_GET_COUNT(ptd), ep->maxpacket, len);
if (usb_pipecontrol(urb->pipe)) {
ep->nextpid = USB_PID_ACK;
/* save the data underrun error code for later and
* procede with the status stage
*/
urb->actual_length += PTD_GET_COUNT(ptd);
BUG_ON(urb->actual_length > urb->transfer_buffer_length);
if (urb->status == -EINPROGRESS)
urb->status = cc_to_error[PTD_DATAUNDERRUN];
} else {
usb_settoggle(udev, ep->epnum, ep->nextpid == USB_PID_OUT,
PTD_GET_TOGGLE(ptd));
urbstat = cc_to_error[PTD_DATAUNDERRUN];
}
goto out;
}
}
if (cc != PTD_CC_NOERROR) {
if (++ep->error_count >= 3 || cc == PTD_CC_STALL || cc == PTD_DATAOVERRUN) {
urbstat = cc_to_error[cc];
DBG(1, "%s: req %d nextpid %02x, status %d, error %d, error_count %d\n",
__func__, ep->num_req, ep->nextpid, urbstat, cc,
ep->error_count);
}
goto out;
}
switch (ep->nextpid) {
case USB_PID_OUT:
if (PTD_GET_COUNT(ptd) != ep->length)
pr_err("%s: count=%d len=%d\n", __func__,
PTD_GET_COUNT(ptd), ep->length);
BUG_ON(PTD_GET_COUNT(ptd) != ep->length);
urb->actual_length += ep->length;
BUG_ON(urb->actual_length > urb->transfer_buffer_length);
usb_settoggle(udev, ep->epnum, 1, PTD_GET_TOGGLE(ptd));
if (urb->actual_length == urb->transfer_buffer_length) {
DBG(3, "%s: req %d xfer complete %d/%d status %d -> 0\n", __func__,
ep->num_req, len, ep->maxpacket, urbstat);
if (usb_pipecontrol(urb->pipe)) {
DBG(3, "%s: req %d %s Wait for ACK\n", __func__,
ep->num_req,
usb_pipein(urb->pipe) ? "IN" : "OUT");
ep->nextpid = USB_PID_ACK;
} else {
if (len % ep->maxpacket ||
!(urb->transfer_flags & URB_ZERO_PACKET)) {
urbstat = 0;
DBG(3, "%s: req %d URB %s status %d count %d/%d/%d\n",
__func__, ep->num_req, usb_pipein(urb->pipe) ? "IN" : "OUT",
urbstat, len, ep->maxpacket, urb->actual_length);
}
}
}
break;
case USB_PID_IN:
len = PTD_GET_COUNT(ptd);
BUG_ON(len > ep->length);
urb->actual_length += len;
BUG_ON(urb->actual_length > urb->transfer_buffer_length);
usb_settoggle(udev, ep->epnum, 0, PTD_GET_TOGGLE(ptd));
/* if transfer completed or (allowed) data underrun */
if ((urb->transfer_buffer_length == urb->actual_length) ||
len % ep->maxpacket) {
DBG(3, "%s: req %d xfer complete %d/%d status %d -> 0\n", __func__,
ep->num_req, len, ep->maxpacket, urbstat);
if (usb_pipecontrol(urb->pipe)) {
DBG(3, "%s: req %d %s Wait for ACK\n", __func__,
ep->num_req,
usb_pipein(urb->pipe) ? "IN" : "OUT");
ep->nextpid = USB_PID_ACK;
} else {
urbstat = 0;
DBG(3, "%s: req %d URB %s status %d count %d/%d/%d\n",
__func__, ep->num_req, usb_pipein(urb->pipe) ? "IN" : "OUT",
urbstat, len, ep->maxpacket, urb->actual_length);
}
}
break;
case USB_PID_SETUP:
if (urb->transfer_buffer_length == urb->actual_length) {
ep->nextpid = USB_PID_ACK;
} else if (usb_pipeout(urb->pipe)) {
usb_settoggle(udev, 0, 1, 1);
ep->nextpid = USB_PID_OUT;
} else {
usb_settoggle(udev, 0, 0, 1);
ep->nextpid = USB_PID_IN;
}
break;
case USB_PID_ACK:
DBG(3, "%s: req %d got ACK %d -> 0\n", __func__, ep->num_req,
urbstat);
WARN_ON(urbstat != -EINPROGRESS);
urbstat = 0;
ep->nextpid = 0;
break;
default:
BUG_ON(1);
}
out:
if (urbstat != -EINPROGRESS) {
DBG(2, "%s: Finishing ep %p req %d urb %p status %d\n", __func__,
ep, ep->num_req, urb, urbstat);
finish_request(isp1362_hcd, ep, urb, urbstat);
}
}
static void finish_unlinks(struct isp1362_hcd *isp1362_hcd)
{
struct isp1362_ep *ep;
struct isp1362_ep *tmp;
list_for_each_entry_safe(ep, tmp, &isp1362_hcd->remove_list, remove_list) {
struct isp1362_ep_queue *epq =
get_ptd_queue(isp1362_hcd, ep->ptd_offset);
int index = ep->ptd_index;
BUG_ON(epq == NULL);
if (index >= 0) {
DBG(1, "%s: remove PTD[%d] $%04x\n", __func__, index, ep->ptd_offset);
BUG_ON(ep->num_ptds == 0);
release_ptd_buffers(epq, ep);
}
if (!list_empty(&ep->hep->urb_list)) {
struct urb *urb = get_urb(ep);
DBG(1, "%s: Finishing req %d ep %p from remove_list\n", __func__,
ep->num_req, ep);
finish_request(isp1362_hcd, ep, urb, -ESHUTDOWN);
}
WARN_ON(list_empty(&ep->active));
if (!list_empty(&ep->active)) {
list_del_init(&ep->active);
DBG(1, "%s: ep %p removed from active list\n", __func__, ep);
}
list_del_init(&ep->remove_list);
DBG(1, "%s: ep %p removed from remove_list\n", __func__, ep);
}
DBG(1, "%s: Done\n", __func__);
}
static inline void enable_atl_transfers(struct isp1362_hcd *isp1362_hcd, int count)
{
if (count > 0) {
if (count < isp1362_hcd->atl_queue.ptd_count)
isp1362_write_reg16(isp1362_hcd, HCATLDTC, count);
isp1362_enable_int(isp1362_hcd, HCuPINT_ATL);
isp1362_write_reg32(isp1362_hcd, HCATLSKIP, isp1362_hcd->atl_queue.skip_map);
isp1362_set_mask16(isp1362_hcd, HCBUFSTAT, HCBUFSTAT_ATL_ACTIVE);
} else
isp1362_enable_int(isp1362_hcd, HCuPINT_SOF);
}
static inline void enable_intl_transfers(struct isp1362_hcd *isp1362_hcd)
{
isp1362_enable_int(isp1362_hcd, HCuPINT_INTL);
isp1362_set_mask16(isp1362_hcd, HCBUFSTAT, HCBUFSTAT_INTL_ACTIVE);
isp1362_write_reg32(isp1362_hcd, HCINTLSKIP, isp1362_hcd->intl_queue.skip_map);
}
static inline void enable_istl_transfers(struct isp1362_hcd *isp1362_hcd, int flip)
{
isp1362_enable_int(isp1362_hcd, flip ? HCuPINT_ISTL1 : HCuPINT_ISTL0);
isp1362_set_mask16(isp1362_hcd, HCBUFSTAT, flip ?
HCBUFSTAT_ISTL1_FULL : HCBUFSTAT_ISTL0_FULL);
}
static int submit_req(struct isp1362_hcd *isp1362_hcd, struct urb *urb,
struct isp1362_ep *ep, struct isp1362_ep_queue *epq)
{
int index = epq->free_ptd;
prepare_ptd(isp1362_hcd, urb, ep, epq, 0);
index = claim_ptd_buffers(epq, ep, ep->length);
if (index == -ENOMEM) {
DBG(1, "%s: req %d No free %s PTD available: %d, %08lx:%08lx\n", __func__,
ep->num_req, epq->name, ep->num_ptds, epq->buf_map, epq->skip_map);
return index;
} else if (index == -EOVERFLOW) {
DBG(1, "%s: req %d Not enough space for %d byte %s PTD %d %08lx:%08lx\n",
__func__, ep->num_req, ep->length, epq->name, ep->num_ptds,
epq->buf_map, epq->skip_map);
return index;
} else
BUG_ON(index < 0);
list_add_tail(&ep->active, &epq->active);
DBG(1, "%s: ep %p req %d len %d added to active list %p\n", __func__,
ep, ep->num_req, ep->length, &epq->active);
DBG(1, "%s: Submitting %s PTD $%04x for ep %p req %d\n", __func__, epq->name,
ep->ptd_offset, ep, ep->num_req);
isp1362_write_ptd(isp1362_hcd, ep, epq);
__clear_bit(ep->ptd_index, &epq->skip_map);
return 0;
}
static void start_atl_transfers(struct isp1362_hcd *isp1362_hcd)
{
int ptd_count = 0;
struct isp1362_ep_queue *epq = &isp1362_hcd->atl_queue;
struct isp1362_ep *ep;
int defer = 0;
if (atomic_read(&epq->finishing)) {
DBG(1, "%s: finish_transfers is active for %s\n", __func__, epq->name);
return;
}
list_for_each_entry(ep, &isp1362_hcd->async, schedule) {
struct urb *urb = get_urb(ep);
int ret;
if (!list_empty(&ep->active)) {
DBG(2, "%s: Skipping active %s ep %p\n", __func__, epq->name, ep);
continue;
}
DBG(1, "%s: Processing %s ep %p req %d\n", __func__, epq->name,
ep, ep->num_req);
ret = submit_req(isp1362_hcd, urb, ep, epq);
if (ret == -ENOMEM) {
defer = 1;
break;
} else if (ret == -EOVERFLOW) {
defer = 1;
continue;
}
#ifdef BUGGY_PXA2XX_UDC_USBTEST
defer = ep->nextpid == USB_PID_SETUP;
#endif
ptd_count++;
}
/* Avoid starving of endpoints */
if (isp1362_hcd->async.next != isp1362_hcd->async.prev) {
DBG(2, "%s: Cycling ASYNC schedule %d\n", __func__, ptd_count);
list_move(&isp1362_hcd->async, isp1362_hcd->async.next);
}
if (ptd_count || defer)
enable_atl_transfers(isp1362_hcd, defer ? 0 : ptd_count);
epq->ptd_count += ptd_count;
if (epq->ptd_count > epq->stat_maxptds) {
epq->stat_maxptds = epq->ptd_count;
DBG(0, "%s: max_ptds: %d\n", __func__, epq->stat_maxptds);
}
}
static void start_intl_transfers(struct isp1362_hcd *isp1362_hcd)
{
int ptd_count = 0;
struct isp1362_ep_queue *epq = &isp1362_hcd->intl_queue;
struct isp1362_ep *ep;
if (atomic_read(&epq->finishing)) {
DBG(1, "%s: finish_transfers is active for %s\n", __func__, epq->name);
return;
}
list_for_each_entry(ep, &isp1362_hcd->periodic, schedule) {
struct urb *urb = get_urb(ep);
int ret;
if (!list_empty(&ep->active)) {
DBG(1, "%s: Skipping active %s ep %p\n", __func__,
epq->name, ep);
continue;
}
DBG(1, "%s: Processing %s ep %p req %d\n", __func__,
epq->name, ep, ep->num_req);
ret = submit_req(isp1362_hcd, urb, ep, epq);
if (ret == -ENOMEM)
break;
else if (ret == -EOVERFLOW)
continue;
ptd_count++;
}
if (ptd_count) {
static int last_count;
if (ptd_count != last_count) {
DBG(0, "%s: ptd_count: %d\n", __func__, ptd_count);
last_count = ptd_count;
}
enable_intl_transfers(isp1362_hcd);
}
epq->ptd_count += ptd_count;
if (epq->ptd_count > epq->stat_maxptds)
epq->stat_maxptds = epq->ptd_count;
}
static inline int next_ptd(struct isp1362_ep_queue *epq, struct isp1362_ep *ep)
{
u16 ptd_offset = ep->ptd_offset;
int num_ptds = (ep->length + PTD_HEADER_SIZE + (epq->blk_size - 1)) / epq->blk_size;
DBG(2, "%s: PTD offset $%04x + %04x => %d * %04x -> $%04x\n", __func__, ptd_offset,
ep->length, num_ptds, epq->blk_size, ptd_offset + num_ptds * epq->blk_size);
ptd_offset += num_ptds * epq->blk_size;
if (ptd_offset < epq->buf_start + epq->buf_size)
return ptd_offset;
else
return -ENOMEM;
}
static void start_iso_transfers(struct isp1362_hcd *isp1362_hcd)
{
int ptd_count = 0;
int flip = isp1362_hcd->istl_flip;
struct isp1362_ep_queue *epq;
int ptd_offset;
struct isp1362_ep *ep;
struct isp1362_ep *tmp;
u16 fno = isp1362_read_reg32(isp1362_hcd, HCFMNUM);
fill2:
epq = &isp1362_hcd->istl_queue[flip];
if (atomic_read(&epq->finishing)) {
DBG(1, "%s: finish_transfers is active for %s\n", __func__, epq->name);
return;
}
if (!list_empty(&epq->active))
return;
ptd_offset = epq->buf_start;
list_for_each_entry_safe(ep, tmp, &isp1362_hcd->isoc, schedule) {
struct urb *urb = get_urb(ep);
s16 diff = fno - (u16)urb->start_frame;
DBG(1, "%s: Processing %s ep %p\n", __func__, epq->name, ep);
if (diff > urb->number_of_packets) {
/* time frame for this URB has elapsed */
finish_request(isp1362_hcd, ep, urb, -EOVERFLOW);
continue;
} else if (diff < -1) {
/* URB is not due in this frame or the next one.
* Comparing with '-1' instead of '0' accounts for double
* buffering in the ISP1362 which enables us to queue the PTD
* one frame ahead of time
*/
} else if (diff == -1) {
/* submit PTD's that are due in the next frame */
prepare_ptd(isp1362_hcd, urb, ep, epq, fno);
if (ptd_offset + PTD_HEADER_SIZE + ep->length >
epq->buf_start + epq->buf_size) {
pr_err("%s: Not enough ISO buffer space for %d byte PTD\n",
__func__, ep->length);
continue;
}
ep->ptd_offset = ptd_offset;
list_add_tail(&ep->active, &epq->active);
ptd_offset = next_ptd(epq, ep);
if (ptd_offset < 0) {
pr_warning("%s: req %d No more %s PTD buffers available\n", __func__,
ep->num_req, epq->name);
break;
}
}
}
list_for_each_entry(ep, &epq->active, active) {
if (epq->active.next == &ep->active)
ep->ptd.mps |= PTD_LAST_MSK;
isp1362_write_ptd(isp1362_hcd, ep, epq);
ptd_count++;
}
if (ptd_count)
enable_istl_transfers(isp1362_hcd, flip);
epq->ptd_count += ptd_count;
if (epq->ptd_count > epq->stat_maxptds)
epq->stat_maxptds = epq->ptd_count;
/* check, whether the second ISTL buffer may also be filled */
if (!(isp1362_read_reg16(isp1362_hcd, HCBUFSTAT) &
(flip ? HCBUFSTAT_ISTL0_FULL : HCBUFSTAT_ISTL1_FULL))) {
fno++;
ptd_count = 0;
flip = 1 - flip;
goto fill2;
}
}
static void finish_transfers(struct isp1362_hcd *isp1362_hcd, unsigned long done_map,
struct isp1362_ep_queue *epq)
{
struct isp1362_ep *ep;
struct isp1362_ep *tmp;
if (list_empty(&epq->active)) {
DBG(1, "%s: Nothing to do for %s queue\n", __func__, epq->name);
return;
}
DBG(1, "%s: Finishing %s transfers %08lx\n", __func__, epq->name, done_map);
atomic_inc(&epq->finishing);
list_for_each_entry_safe(ep, tmp, &epq->active, active) {
int index = ep->ptd_index;
DBG(1, "%s: Checking %s PTD[%02x] $%04x\n", __func__, epq->name,
index, ep->ptd_offset);
BUG_ON(index < 0);
if (__test_and_clear_bit(index, &done_map)) {
isp1362_read_ptd(isp1362_hcd, ep, epq);
epq->free_ptd = index;
BUG_ON(ep->num_ptds == 0);
release_ptd_buffers(epq, ep);
DBG(1, "%s: ep %p req %d removed from active list\n", __func__,
ep, ep->num_req);
if (!list_empty(&ep->remove_list)) {
list_del_init(&ep->remove_list);
DBG(1, "%s: ep %p removed from remove list\n", __func__, ep);
}
DBG(1, "%s: Postprocessing %s ep %p req %d\n", __func__, epq->name,
ep, ep->num_req);
postproc_ep(isp1362_hcd, ep);
}
if (!done_map)
break;
}
if (done_map)
pr_warning("%s: done_map not clear: %08lx:%08lx\n", __func__, done_map,
epq->skip_map);
atomic_dec(&epq->finishing);
}
static void finish_iso_transfers(struct isp1362_hcd *isp1362_hcd, struct isp1362_ep_queue *epq)
{
struct isp1362_ep *ep;
struct isp1362_ep *tmp;
if (list_empty(&epq->active)) {
DBG(1, "%s: Nothing to do for %s queue\n", __func__, epq->name);
return;
}
DBG(1, "%s: Finishing %s transfers\n", __func__, epq->name);
atomic_inc(&epq->finishing);
list_for_each_entry_safe(ep, tmp, &epq->active, active) {
DBG(1, "%s: Checking PTD $%04x\n", __func__, ep->ptd_offset);
isp1362_read_ptd(isp1362_hcd, ep, epq);
DBG(1, "%s: Postprocessing %s ep %p\n", __func__, epq->name, ep);
postproc_ep(isp1362_hcd, ep);
}
WARN_ON(epq->blk_size != 0);
atomic_dec(&epq->finishing);
}
static irqreturn_t isp1362_irq(struct usb_hcd *hcd)
{
int handled = 0;
struct isp1362_hcd *isp1362_hcd = hcd_to_isp1362_hcd(hcd);
u16 irqstat;
u16 svc_mask;
spin_lock(&isp1362_hcd->lock);
BUG_ON(isp1362_hcd->irq_active++);
isp1362_write_reg16(isp1362_hcd, HCuPINTENB, 0);
irqstat = isp1362_read_reg16(isp1362_hcd, HCuPINT);
DBG(3, "%s: got IRQ %04x:%04x\n", __func__, irqstat, isp1362_hcd->irqenb);
/* only handle interrupts that are currently enabled */
irqstat &= isp1362_hcd->irqenb;
isp1362_write_reg16(isp1362_hcd, HCuPINT, irqstat);
svc_mask = irqstat;
if (irqstat & HCuPINT_SOF) {
isp1362_hcd->irqenb &= ~HCuPINT_SOF;
isp1362_hcd->irq_stat[ISP1362_INT_SOF]++;
handled = 1;
svc_mask &= ~HCuPINT_SOF;
DBG(3, "%s: SOF\n", __func__);
isp1362_hcd->fmindex = isp1362_read_reg32(isp1362_hcd, HCFMNUM);
if (!list_empty(&isp1362_hcd->remove_list))
finish_unlinks(isp1362_hcd);
if (!list_empty(&isp1362_hcd->async) && !(irqstat & HCuPINT_ATL)) {
if (list_empty(&isp1362_hcd->atl_queue.active)) {
start_atl_transfers(isp1362_hcd);
} else {
isp1362_enable_int(isp1362_hcd, HCuPINT_ATL);
isp1362_write_reg32(isp1362_hcd, HCATLSKIP,
isp1362_hcd->atl_queue.skip_map);
isp1362_set_mask16(isp1362_hcd, HCBUFSTAT, HCBUFSTAT_ATL_ACTIVE);
}
}
}
if (irqstat & HCuPINT_ISTL0) {
isp1362_hcd->irq_stat[ISP1362_INT_ISTL0]++;
handled = 1;
svc_mask &= ~HCuPINT_ISTL0;
isp1362_clr_mask16(isp1362_hcd, HCBUFSTAT, HCBUFSTAT_ISTL0_FULL);
DBG(1, "%s: ISTL0\n", __func__);
WARN_ON((int)!!isp1362_hcd->istl_flip);
WARN_ON(isp1362_read_reg16(isp1362_hcd, HCBUFSTAT) &
HCBUFSTAT_ISTL0_ACTIVE);
WARN_ON(!(isp1362_read_reg16(isp1362_hcd, HCBUFSTAT) &
HCBUFSTAT_ISTL0_DONE));
isp1362_hcd->irqenb &= ~HCuPINT_ISTL0;
}
if (irqstat & HCuPINT_ISTL1) {
isp1362_hcd->irq_stat[ISP1362_INT_ISTL1]++;
handled = 1;
svc_mask &= ~HCuPINT_ISTL1;
isp1362_clr_mask16(isp1362_hcd, HCBUFSTAT, HCBUFSTAT_ISTL1_FULL);
DBG(1, "%s: ISTL1\n", __func__);
WARN_ON(!(int)isp1362_hcd->istl_flip);
WARN_ON(isp1362_read_reg16(isp1362_hcd, HCBUFSTAT) &
HCBUFSTAT_ISTL1_ACTIVE);
WARN_ON(!(isp1362_read_reg16(isp1362_hcd, HCBUFSTAT) &
HCBUFSTAT_ISTL1_DONE));
isp1362_hcd->irqenb &= ~HCuPINT_ISTL1;
}
if (irqstat & (HCuPINT_ISTL0 | HCuPINT_ISTL1)) {
WARN_ON((irqstat & (HCuPINT_ISTL0 | HCuPINT_ISTL1)) ==
(HCuPINT_ISTL0 | HCuPINT_ISTL1));
finish_iso_transfers(isp1362_hcd,
&isp1362_hcd->istl_queue[isp1362_hcd->istl_flip]);
start_iso_transfers(isp1362_hcd);
isp1362_hcd->istl_flip = 1 - isp1362_hcd->istl_flip;
}
if (irqstat & HCuPINT_INTL) {
u32 done_map = isp1362_read_reg32(isp1362_hcd, HCINTLDONE);
u32 skip_map = isp1362_read_reg32(isp1362_hcd, HCINTLSKIP);
isp1362_hcd->irq_stat[ISP1362_INT_INTL]++;
DBG(2, "%s: INTL\n", __func__);
svc_mask &= ~HCuPINT_INTL;
isp1362_write_reg32(isp1362_hcd, HCINTLSKIP, skip_map | done_map);
if (~(done_map | skip_map) == 0)
/* All PTDs are finished, disable INTL processing entirely */
isp1362_clr_mask16(isp1362_hcd, HCBUFSTAT, HCBUFSTAT_INTL_ACTIVE);
handled = 1;
WARN_ON(!done_map);
if (done_map) {
DBG(3, "%s: INTL done_map %08x\n", __func__, done_map);
finish_transfers(isp1362_hcd, done_map, &isp1362_hcd->intl_queue);
start_intl_transfers(isp1362_hcd);
}
}
if (irqstat & HCuPINT_ATL) {
u32 done_map = isp1362_read_reg32(isp1362_hcd, HCATLDONE);
u32 skip_map = isp1362_read_reg32(isp1362_hcd, HCATLSKIP);
isp1362_hcd->irq_stat[ISP1362_INT_ATL]++;
DBG(2, "%s: ATL\n", __func__);
svc_mask &= ~HCuPINT_ATL;
isp1362_write_reg32(isp1362_hcd, HCATLSKIP, skip_map | done_map);
if (~(done_map | skip_map) == 0)
isp1362_clr_mask16(isp1362_hcd, HCBUFSTAT, HCBUFSTAT_ATL_ACTIVE);
if (done_map) {
DBG(3, "%s: ATL done_map %08x\n", __func__, done_map);
finish_transfers(isp1362_hcd, done_map, &isp1362_hcd->atl_queue);
start_atl_transfers(isp1362_hcd);
}
handled = 1;
}
if (irqstat & HCuPINT_OPR) {
u32 intstat = isp1362_read_reg32(isp1362_hcd, HCINTSTAT);
isp1362_hcd->irq_stat[ISP1362_INT_OPR]++;
svc_mask &= ~HCuPINT_OPR;
DBG(2, "%s: OPR %08x:%08x\n", __func__, intstat, isp1362_hcd->intenb);
intstat &= isp1362_hcd->intenb;
if (intstat & OHCI_INTR_UE) {
pr_err("Unrecoverable error\n");
/* FIXME: do here reset or cleanup or whatever */
}
if (intstat & OHCI_INTR_RHSC) {
isp1362_hcd->rhstatus = isp1362_read_reg32(isp1362_hcd, HCRHSTATUS);
isp1362_hcd->rhport[0] = isp1362_read_reg32(isp1362_hcd, HCRHPORT1);
isp1362_hcd->rhport[1] = isp1362_read_reg32(isp1362_hcd, HCRHPORT2);
}
if (intstat & OHCI_INTR_RD) {
pr_info("%s: RESUME DETECTED\n", __func__);
isp1362_show_reg(isp1362_hcd, HCCONTROL);
usb_hcd_resume_root_hub(hcd);
}
isp1362_write_reg32(isp1362_hcd, HCINTSTAT, intstat);
irqstat &= ~HCuPINT_OPR;
handled = 1;
}
if (irqstat & HCuPINT_SUSP) {
isp1362_hcd->irq_stat[ISP1362_INT_SUSP]++;
handled = 1;
svc_mask &= ~HCuPINT_SUSP;
pr_info("%s: SUSPEND IRQ\n", __func__);
}
if (irqstat & HCuPINT_CLKRDY) {
isp1362_hcd->irq_stat[ISP1362_INT_CLKRDY]++;
handled = 1;
isp1362_hcd->irqenb &= ~HCuPINT_CLKRDY;
svc_mask &= ~HCuPINT_CLKRDY;
pr_info("%s: CLKRDY IRQ\n", __func__);
}
if (svc_mask)
pr_err("%s: Unserviced interrupt(s) %04x\n", __func__, svc_mask);
isp1362_write_reg16(isp1362_hcd, HCuPINTENB, isp1362_hcd->irqenb);
isp1362_hcd->irq_active--;
spin_unlock(&isp1362_hcd->lock);
return IRQ_RETVAL(handled);
}
/*-------------------------------------------------------------------------*/
#define MAX_PERIODIC_LOAD 900 /* out of 1000 usec */
static int balance(struct isp1362_hcd *isp1362_hcd, u16 interval, u16 load)
{
int i, branch = -ENOSPC;
/* search for the least loaded schedule branch of that interval
* which has enough bandwidth left unreserved.
*/
for (i = 0; i < interval; i++) {
if (branch < 0 || isp1362_hcd->load[branch] > isp1362_hcd->load[i]) {
int j;
for (j = i; j < PERIODIC_SIZE; j += interval) {
if ((isp1362_hcd->load[j] + load) > MAX_PERIODIC_LOAD) {
pr_err("%s: new load %d load[%02x] %d max %d\n", __func__,
load, j, isp1362_hcd->load[j], MAX_PERIODIC_LOAD);
break;
}
}
if (j < PERIODIC_SIZE)
continue;
branch = i;
}
}
return branch;
}
/* NB! ALL the code above this point runs with isp1362_hcd->lock
held, irqs off
*/
/*-------------------------------------------------------------------------*/
static int isp1362_urb_enqueue(struct usb_hcd *hcd,
struct urb *urb,
gfp_t mem_flags)
{
struct isp1362_hcd *isp1362_hcd = hcd_to_isp1362_hcd(hcd);
struct usb_device *udev = urb->dev;
unsigned int pipe = urb->pipe;
int is_out = !usb_pipein(pipe);
int type = usb_pipetype(pipe);
int epnum = usb_pipeendpoint(pipe);
struct usb_host_endpoint *hep = urb->ep;
struct isp1362_ep *ep = NULL;
unsigned long flags;
int retval = 0;
DBG(3, "%s: urb %p\n", __func__, urb);
if (type == PIPE_ISOCHRONOUS) {
pr_err("Isochronous transfers not supported\n");
return -ENOSPC;
}
URB_DBG("%s: FA %d ep%d%s %s: len %d %s%s\n", __func__,
usb_pipedevice(pipe), epnum,
is_out ? "out" : "in",
usb_pipecontrol(pipe) ? "ctrl" :
usb_pipeint(pipe) ? "int" :
usb_pipebulk(pipe) ? "bulk" :
"iso",
urb->transfer_buffer_length,
(urb->transfer_flags & URB_ZERO_PACKET) ? "ZERO_PACKET " : "",
!(urb->transfer_flags & URB_SHORT_NOT_OK) ?
"short_ok" : "");
/* avoid all allocations within spinlocks: request or endpoint */
if (!hep->hcpriv) {
ep = kzalloc(sizeof *ep, mem_flags);
if (!ep)
return -ENOMEM;
}
spin_lock_irqsave(&isp1362_hcd->lock, flags);
/* don't submit to a dead or disabled port */
if (!((isp1362_hcd->rhport[0] | isp1362_hcd->rhport[1]) &
USB_PORT_STAT_ENABLE) ||
!HC_IS_RUNNING(hcd->state)) {
kfree(ep);
retval = -ENODEV;
goto fail_not_linked;
}
retval = usb_hcd_link_urb_to_ep(hcd, urb);
if (retval) {
kfree(ep);
goto fail_not_linked;
}
if (hep->hcpriv) {
ep = hep->hcpriv;
} else {
INIT_LIST_HEAD(&ep->schedule);
INIT_LIST_HEAD(&ep->active);
INIT_LIST_HEAD(&ep->remove_list);
ep->udev = usb_get_dev(udev);
ep->hep = hep;
ep->epnum = epnum;
ep->maxpacket = usb_maxpacket(udev, urb->pipe, is_out);
ep->ptd_offset = -EINVAL;
ep->ptd_index = -EINVAL;
usb_settoggle(udev, epnum, is_out, 0);
if (type == PIPE_CONTROL)
ep->nextpid = USB_PID_SETUP;
else if (is_out)
ep->nextpid = USB_PID_OUT;
else
ep->nextpid = USB_PID_IN;
switch (type) {
case PIPE_ISOCHRONOUS:
case PIPE_INTERRUPT:
if (urb->interval > PERIODIC_SIZE)
urb->interval = PERIODIC_SIZE;
ep->interval = urb->interval;
ep->branch = PERIODIC_SIZE;
ep->load = usb_calc_bus_time(udev->speed, !is_out,
(type == PIPE_ISOCHRONOUS),
usb_maxpacket(udev, pipe, is_out)) / 1000;
break;
}
hep->hcpriv = ep;
}
ep->num_req = isp1362_hcd->req_serial++;
/* maybe put endpoint into schedule */
switch (type) {
case PIPE_CONTROL:
case PIPE_BULK:
if (list_empty(&ep->schedule)) {
DBG(1, "%s: Adding ep %p req %d to async schedule\n",
__func__, ep, ep->num_req);
list_add_tail(&ep->schedule, &isp1362_hcd->async);
}
break;
case PIPE_ISOCHRONOUS:
case PIPE_INTERRUPT:
urb->interval = ep->interval;
/* urb submitted for already existing EP */
if (ep->branch < PERIODIC_SIZE)
break;
retval = balance(isp1362_hcd, ep->interval, ep->load);
if (retval < 0) {
pr_err("%s: balance returned %d\n", __func__, retval);
goto fail;
}
ep->branch = retval;
retval = 0;
isp1362_hcd->fmindex = isp1362_read_reg32(isp1362_hcd, HCFMNUM);
DBG(1, "%s: Current frame %04x branch %02x start_frame %04x(%04x)\n",
__func__, isp1362_hcd->fmindex, ep->branch,
((isp1362_hcd->fmindex + PERIODIC_SIZE - 1) &
~(PERIODIC_SIZE - 1)) + ep->branch,
(isp1362_hcd->fmindex & (PERIODIC_SIZE - 1)) + ep->branch);
if (list_empty(&ep->schedule)) {
if (type == PIPE_ISOCHRONOUS) {
u16 frame = isp1362_hcd->fmindex;
frame += max_t(u16, 8, ep->interval);
frame &= ~(ep->interval - 1);
frame |= ep->branch;
if (frame_before(frame, isp1362_hcd->fmindex))
frame += ep->interval;
urb->start_frame = frame;
DBG(1, "%s: Adding ep %p to isoc schedule\n", __func__, ep);
list_add_tail(&ep->schedule, &isp1362_hcd->isoc);
} else {
DBG(1, "%s: Adding ep %p to periodic schedule\n", __func__, ep);
list_add_tail(&ep->schedule, &isp1362_hcd->periodic);
}
} else
DBG(1, "%s: ep %p already scheduled\n", __func__, ep);
DBG(2, "%s: load %d bandwidth %d -> %d\n", __func__,
ep->load / ep->interval, isp1362_hcd->load[ep->branch],
isp1362_hcd->load[ep->branch] + ep->load);
isp1362_hcd->load[ep->branch] += ep->load;
}
urb->hcpriv = hep;
ALIGNSTAT(isp1362_hcd, urb->transfer_buffer);
switch (type) {
case PIPE_CONTROL:
case PIPE_BULK:
start_atl_transfers(isp1362_hcd);
break;
case PIPE_INTERRUPT:
start_intl_transfers(isp1362_hcd);
break;
case PIPE_ISOCHRONOUS:
start_iso_transfers(isp1362_hcd);
break;
default:
BUG();
}
fail:
if (retval)
usb_hcd_unlink_urb_from_ep(hcd, urb);
fail_not_linked:
spin_unlock_irqrestore(&isp1362_hcd->lock, flags);
if (retval)
DBG(0, "%s: urb %p failed with %d\n", __func__, urb, retval);
return retval;
}
static int isp1362_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status)
{
struct isp1362_hcd *isp1362_hcd = hcd_to_isp1362_hcd(hcd);
struct usb_host_endpoint *hep;
unsigned long flags;
struct isp1362_ep *ep;
int retval = 0;
DBG(3, "%s: urb %p\n", __func__, urb);
spin_lock_irqsave(&isp1362_hcd->lock, flags);
retval = usb_hcd_check_unlink_urb(hcd, urb, status);
if (retval)
goto done;
hep = urb->hcpriv;
if (!hep) {
spin_unlock_irqrestore(&isp1362_hcd->lock, flags);
return -EIDRM;
}
ep = hep->hcpriv;
if (ep) {
/* In front of queue? */
if (ep->hep->urb_list.next == &urb->urb_list) {
if (!list_empty(&ep->active)) {
DBG(1, "%s: urb %p ep %p req %d active PTD[%d] $%04x\n", __func__,
urb, ep, ep->num_req, ep->ptd_index, ep->ptd_offset);
/* disable processing and queue PTD for removal */
remove_ptd(isp1362_hcd, ep);
urb = NULL;
}
}
if (urb) {
DBG(1, "%s: Finishing ep %p req %d\n", __func__, ep,
ep->num_req);
finish_request(isp1362_hcd, ep, urb, status);
} else
DBG(1, "%s: urb %p active; wait4irq\n", __func__, urb);
} else {
pr_warning("%s: No EP in URB %p\n", __func__, urb);
retval = -EINVAL;
}
done:
spin_unlock_irqrestore(&isp1362_hcd->lock, flags);
DBG(3, "%s: exit\n", __func__);
return retval;
}
static void isp1362_endpoint_disable(struct usb_hcd *hcd, struct usb_host_endpoint *hep)
{
struct isp1362_ep *ep = hep->hcpriv;
struct isp1362_hcd *isp1362_hcd = hcd_to_isp1362_hcd(hcd);
unsigned long flags;
DBG(1, "%s: ep %p\n", __func__, ep);
if (!ep)
return;
spin_lock_irqsave(&isp1362_hcd->lock, flags);
if (!list_empty(&hep->urb_list)) {
if (!list_empty(&ep->active) && list_empty(&ep->remove_list)) {
DBG(1, "%s: Removing ep %p req %d PTD[%d] $%04x\n", __func__,
ep, ep->num_req, ep->ptd_index, ep->ptd_offset);
remove_ptd(isp1362_hcd, ep);
pr_info("%s: Waiting for Interrupt to clean up\n", __func__);
}
}
spin_unlock_irqrestore(&isp1362_hcd->lock, flags);
/* Wait for interrupt to clear out active list */
while (!list_empty(&ep->active))
msleep(1);
DBG(1, "%s: Freeing EP %p\n", __func__, ep);
usb_put_dev(ep->udev);
kfree(ep);
hep->hcpriv = NULL;
}
static int isp1362_get_frame(struct usb_hcd *hcd)
{
struct isp1362_hcd *isp1362_hcd = hcd_to_isp1362_hcd(hcd);
u32 fmnum;
unsigned long flags;
spin_lock_irqsave(&isp1362_hcd->lock, flags);
fmnum = isp1362_read_reg32(isp1362_hcd, HCFMNUM);
spin_unlock_irqrestore(&isp1362_hcd->lock, flags);
return (int)fmnum;
}
/*-------------------------------------------------------------------------*/
/* Adapted from ohci-hub.c */
static int isp1362_hub_status_data(struct usb_hcd *hcd, char *buf)
{
struct isp1362_hcd *isp1362_hcd = hcd_to_isp1362_hcd(hcd);
int ports, i, changed = 0;
unsigned long flags;
if (!HC_IS_RUNNING(hcd->state))
return -ESHUTDOWN;
/* Report no status change now, if we are scheduled to be
called later */
if (timer_pending(&hcd->rh_timer))
return 0;
ports = isp1362_hcd->rhdesca & RH_A_NDP;
BUG_ON(ports > 2);
spin_lock_irqsave(&isp1362_hcd->lock, flags);
/* init status */
if (isp1362_hcd->rhstatus & (RH_HS_LPSC | RH_HS_OCIC))
buf[0] = changed = 1;
else
buf[0] = 0;
for (i = 0; i < ports; i++) {
u32 status = isp1362_hcd->rhport[i];
if (status & (RH_PS_CSC | RH_PS_PESC | RH_PS_PSSC |
RH_PS_OCIC | RH_PS_PRSC)) {
changed = 1;
buf[0] |= 1 << (i + 1);
continue;
}
if (!(status & RH_PS_CCS))
continue;
}
spin_unlock_irqrestore(&isp1362_hcd->lock, flags);
return changed;
}
static void isp1362_hub_descriptor(struct isp1362_hcd *isp1362_hcd,
struct usb_hub_descriptor *desc)
{
u32 reg = isp1362_hcd->rhdesca;
DBG(3, "%s: enter\n", __func__);
desc->bDescriptorType = 0x29;
desc->bDescLength = 9;
desc->bHubContrCurrent = 0;
desc->bNbrPorts = reg & 0x3;
/* Power switching, device type, overcurrent. */
desc->wHubCharacteristics = cpu_to_le16((reg >> 8) & 0x1f);
DBG(0, "%s: hubcharacteristics = %02x\n", __func__, cpu_to_le16((reg >> 8) & 0x1f));
desc->bPwrOn2PwrGood = (reg >> 24) & 0xff;
/* two bitmaps: ports removable, and legacy PortPwrCtrlMask */
desc->bitmap[0] = desc->bNbrPorts == 1 ? 1 << 1 : 3 << 1;
desc->bitmap[1] = ~0;
DBG(3, "%s: exit\n", __func__);
}
/* Adapted from ohci-hub.c */
static int isp1362_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
u16 wIndex, char *buf, u16 wLength)
{
struct isp1362_hcd *isp1362_hcd = hcd_to_isp1362_hcd(hcd);
int retval = 0;
unsigned long flags;
unsigned long t1;
int ports = isp1362_hcd->rhdesca & RH_A_NDP;
u32 tmp = 0;
switch (typeReq) {
case ClearHubFeature:
DBG(0, "ClearHubFeature: ");
switch (wValue) {
case C_HUB_OVER_CURRENT:
_DBG(0, "C_HUB_OVER_CURRENT\n");
spin_lock_irqsave(&isp1362_hcd->lock, flags);
isp1362_write_reg32(isp1362_hcd, HCRHSTATUS, RH_HS_OCIC);
spin_unlock_irqrestore(&isp1362_hcd->lock, flags);
case C_HUB_LOCAL_POWER:
_DBG(0, "C_HUB_LOCAL_POWER\n");
break;
default:
goto error;
}
break;
case SetHubFeature:
DBG(0, "SetHubFeature: ");
switch (wValue) {
case C_HUB_OVER_CURRENT:
case C_HUB_LOCAL_POWER:
_DBG(0, "C_HUB_OVER_CURRENT or C_HUB_LOCAL_POWER\n");
break;
default:
goto error;
}
break;
case GetHubDescriptor:
DBG(0, "GetHubDescriptor\n");
isp1362_hub_descriptor(isp1362_hcd, (struct usb_hub_descriptor *)buf);
break;
case GetHubStatus:
DBG(0, "GetHubStatus\n");
put_unaligned(cpu_to_le32(0), (__le32 *) buf);
break;
case GetPortStatus:
#ifndef VERBOSE
DBG(0, "GetPortStatus\n");
#endif
if (!wIndex || wIndex > ports)
goto error;
tmp = isp1362_hcd->rhport[--wIndex];
put_unaligned(cpu_to_le32(tmp), (__le32 *) buf);
break;
case ClearPortFeature:
DBG(0, "ClearPortFeature: ");
if (!wIndex || wIndex > ports)
goto error;
wIndex--;
switch (wValue) {
case USB_PORT_FEAT_ENABLE:
_DBG(0, "USB_PORT_FEAT_ENABLE\n");
tmp = RH_PS_CCS;
break;
case USB_PORT_FEAT_C_ENABLE:
_DBG(0, "USB_PORT_FEAT_C_ENABLE\n");
tmp = RH_PS_PESC;
break;
case USB_PORT_FEAT_SUSPEND:
_DBG(0, "USB_PORT_FEAT_SUSPEND\n");
tmp = RH_PS_POCI;
break;
case USB_PORT_FEAT_C_SUSPEND:
_DBG(0, "USB_PORT_FEAT_C_SUSPEND\n");
tmp = RH_PS_PSSC;
break;
case USB_PORT_FEAT_POWER:
_DBG(0, "USB_PORT_FEAT_POWER\n");
tmp = RH_PS_LSDA;
break;
case USB_PORT_FEAT_C_CONNECTION:
_DBG(0, "USB_PORT_FEAT_C_CONNECTION\n");
tmp = RH_PS_CSC;
break;
case USB_PORT_FEAT_C_OVER_CURRENT:
_DBG(0, "USB_PORT_FEAT_C_OVER_CURRENT\n");
tmp = RH_PS_OCIC;
break;
case USB_PORT_FEAT_C_RESET:
_DBG(0, "USB_PORT_FEAT_C_RESET\n");
tmp = RH_PS_PRSC;
break;
default:
goto error;
}
spin_lock_irqsave(&isp1362_hcd->lock, flags);
isp1362_write_reg32(isp1362_hcd, HCRHPORT1 + wIndex, tmp);
isp1362_hcd->rhport[wIndex] =
isp1362_read_reg32(isp1362_hcd, HCRHPORT1 + wIndex);
spin_unlock_irqrestore(&isp1362_hcd->lock, flags);
break;
case SetPortFeature:
DBG(0, "SetPortFeature: ");
if (!wIndex || wIndex > ports)
goto error;
wIndex--;
switch (wValue) {
case USB_PORT_FEAT_SUSPEND:
_DBG(0, "USB_PORT_FEAT_SUSPEND\n");
spin_lock_irqsave(&isp1362_hcd->lock, flags);
isp1362_write_reg32(isp1362_hcd, HCRHPORT1 + wIndex, RH_PS_PSS);
isp1362_hcd->rhport[wIndex] =
isp1362_read_reg32(isp1362_hcd, HCRHPORT1 + wIndex);
spin_unlock_irqrestore(&isp1362_hcd->lock, flags);
break;
case USB_PORT_FEAT_POWER:
_DBG(0, "USB_PORT_FEAT_POWER\n");
spin_lock_irqsave(&isp1362_hcd->lock, flags);
isp1362_write_reg32(isp1362_hcd, HCRHPORT1 + wIndex, RH_PS_PPS);
isp1362_hcd->rhport[wIndex] =
isp1362_read_reg32(isp1362_hcd, HCRHPORT1 + wIndex);
spin_unlock_irqrestore(&isp1362_hcd->lock, flags);
break;
case USB_PORT_FEAT_RESET:
_DBG(0, "USB_PORT_FEAT_RESET\n");
spin_lock_irqsave(&isp1362_hcd->lock, flags);
t1 = jiffies + msecs_to_jiffies(USB_RESET_WIDTH);
while (time_before(jiffies, t1)) {
/* spin until any current reset finishes */
for (;;) {
tmp = isp1362_read_reg32(isp1362_hcd, HCRHPORT1 + wIndex);
if (!(tmp & RH_PS_PRS))
break;
udelay(500);
}
if (!(tmp & RH_PS_CCS))
break;
/* Reset lasts 10ms (claims datasheet) */
isp1362_write_reg32(isp1362_hcd, HCRHPORT1 + wIndex, (RH_PS_PRS));
spin_unlock_irqrestore(&isp1362_hcd->lock, flags);
msleep(10);
spin_lock_irqsave(&isp1362_hcd->lock, flags);
}
isp1362_hcd->rhport[wIndex] = isp1362_read_reg32(isp1362_hcd,
HCRHPORT1 + wIndex);
spin_unlock_irqrestore(&isp1362_hcd->lock, flags);
break;
default:
goto error;
}
break;
default:
error:
/* "protocol stall" on error */
_DBG(0, "PROTOCOL STALL\n");
retval = -EPIPE;
}
return retval;
}
#ifdef CONFIG_PM
static int isp1362_bus_suspend(struct usb_hcd *hcd)
{
int status = 0;
struct isp1362_hcd *isp1362_hcd = hcd_to_isp1362_hcd(hcd);
unsigned long flags;
if (time_before(jiffies, isp1362_hcd->next_statechange))
msleep(5);
spin_lock_irqsave(&isp1362_hcd->lock, flags);
isp1362_hcd->hc_control = isp1362_read_reg32(isp1362_hcd, HCCONTROL);
switch (isp1362_hcd->hc_control & OHCI_CTRL_HCFS) {
case OHCI_USB_RESUME:
DBG(0, "%s: resume/suspend?\n", __func__);
isp1362_hcd->hc_control &= ~OHCI_CTRL_HCFS;
isp1362_hcd->hc_control |= OHCI_USB_RESET;
isp1362_write_reg32(isp1362_hcd, HCCONTROL, isp1362_hcd->hc_control);
/* FALL THROUGH */
case OHCI_USB_RESET:
status = -EBUSY;
pr_warning("%s: needs reinit!\n", __func__);
goto done;
case OHCI_USB_SUSPEND:
pr_warning("%s: already suspended?\n", __func__);
goto done;
}
DBG(0, "%s: suspend root hub\n", __func__);
/* First stop any processing */
hcd->state = HC_STATE_QUIESCING;
if (!list_empty(&isp1362_hcd->atl_queue.active) ||
!list_empty(&isp1362_hcd->intl_queue.active) ||
!list_empty(&isp1362_hcd->istl_queue[0] .active) ||
!list_empty(&isp1362_hcd->istl_queue[1] .active)) {
int limit;
isp1362_write_reg32(isp1362_hcd, HCATLSKIP, ~0);
isp1362_write_reg32(isp1362_hcd, HCINTLSKIP, ~0);
isp1362_write_reg16(isp1362_hcd, HCBUFSTAT, 0);
isp1362_write_reg16(isp1362_hcd, HCuPINTENB, 0);
isp1362_write_reg32(isp1362_hcd, HCINTSTAT, OHCI_INTR_SF);
DBG(0, "%s: stopping schedules ...\n", __func__);
limit = 2000;
while (limit > 0) {
udelay(250);
limit -= 250;
if (isp1362_read_reg32(isp1362_hcd, HCINTSTAT) & OHCI_INTR_SF)
break;
}
mdelay(7);
if (isp1362_read_reg16(isp1362_hcd, HCuPINT) & HCuPINT_ATL) {
u32 done_map = isp1362_read_reg32(isp1362_hcd, HCATLDONE);
finish_transfers(isp1362_hcd, done_map, &isp1362_hcd->atl_queue);
}
if (isp1362_read_reg16(isp1362_hcd, HCuPINT) & HCuPINT_INTL) {
u32 done_map = isp1362_read_reg32(isp1362_hcd, HCINTLDONE);
finish_transfers(isp1362_hcd, done_map, &isp1362_hcd->intl_queue);
}
if (isp1362_read_reg16(isp1362_hcd, HCuPINT) & HCuPINT_ISTL0)
finish_iso_transfers(isp1362_hcd, &isp1362_hcd->istl_queue[0]);
if (isp1362_read_reg16(isp1362_hcd, HCuPINT) & HCuPINT_ISTL1)
finish_iso_transfers(isp1362_hcd, &isp1362_hcd->istl_queue[1]);
}
DBG(0, "%s: HCINTSTAT: %08x\n", __func__,
isp1362_read_reg32(isp1362_hcd, HCINTSTAT));
isp1362_write_reg32(isp1362_hcd, HCINTSTAT,
isp1362_read_reg32(isp1362_hcd, HCINTSTAT));
/* Suspend hub */
isp1362_hcd->hc_control = OHCI_USB_SUSPEND;
isp1362_show_reg(isp1362_hcd, HCCONTROL);
isp1362_write_reg32(isp1362_hcd, HCCONTROL, isp1362_hcd->hc_control);
isp1362_show_reg(isp1362_hcd, HCCONTROL);
#if 1
isp1362_hcd->hc_control = isp1362_read_reg32(isp1362_hcd, HCCONTROL);
if ((isp1362_hcd->hc_control & OHCI_CTRL_HCFS) != OHCI_USB_SUSPEND) {
pr_err("%s: controller won't suspend %08x\n", __func__,
isp1362_hcd->hc_control);
status = -EBUSY;
} else
#endif
{
/* no resumes until devices finish suspending */
isp1362_hcd->next_statechange = jiffies + msecs_to_jiffies(5);
}
done:
if (status == 0) {
hcd->state = HC_STATE_SUSPENDED;
DBG(0, "%s: HCD suspended: %08x\n", __func__,
isp1362_read_reg32(isp1362_hcd, HCCONTROL));
}
spin_unlock_irqrestore(&isp1362_hcd->lock, flags);
return status;
}
static int isp1362_bus_resume(struct usb_hcd *hcd)
{
struct isp1362_hcd *isp1362_hcd = hcd_to_isp1362_hcd(hcd);
u32 port;
unsigned long flags;
int status = -EINPROGRESS;
if (time_before(jiffies, isp1362_hcd->next_statechange))
msleep(5);
spin_lock_irqsave(&isp1362_hcd->lock, flags);
isp1362_hcd->hc_control = isp1362_read_reg32(isp1362_hcd, HCCONTROL);
pr_info("%s: HCCONTROL: %08x\n", __func__, isp1362_hcd->hc_control);
if (hcd->state == HC_STATE_RESUMING) {
pr_warning("%s: duplicate resume\n", __func__);
status = 0;
} else
switch (isp1362_hcd->hc_control & OHCI_CTRL_HCFS) {
case OHCI_USB_SUSPEND:
DBG(0, "%s: resume root hub\n", __func__);
isp1362_hcd->hc_control &= ~OHCI_CTRL_HCFS;
isp1362_hcd->hc_control |= OHCI_USB_RESUME;
isp1362_write_reg32(isp1362_hcd, HCCONTROL, isp1362_hcd->hc_control);
break;
case OHCI_USB_RESUME:
/* HCFS changes sometime after INTR_RD */
DBG(0, "%s: remote wakeup\n", __func__);
break;
case OHCI_USB_OPER:
DBG(0, "%s: odd resume\n", __func__);
status = 0;
hcd->self.root_hub->dev.power.power_state = PMSG_ON;
break;
default: /* RESET, we lost power */
DBG(0, "%s: root hub hardware reset\n", __func__);
status = -EBUSY;
}
spin_unlock_irqrestore(&isp1362_hcd->lock, flags);
if (status == -EBUSY) {
DBG(0, "%s: Restarting HC\n", __func__);
isp1362_hc_stop(hcd);
return isp1362_hc_start(hcd);
}
if (status != -EINPROGRESS)
return status;
spin_lock_irqsave(&isp1362_hcd->lock, flags);
port = isp1362_read_reg32(isp1362_hcd, HCRHDESCA) & RH_A_NDP;
while (port--) {
u32 stat = isp1362_read_reg32(isp1362_hcd, HCRHPORT1 + port);
/* force global, not selective, resume */
if (!(stat & RH_PS_PSS)) {
DBG(0, "%s: Not Resuming RH port %d\n", __func__, port);
continue;
}
DBG(0, "%s: Resuming RH port %d\n", __func__, port);
isp1362_write_reg32(isp1362_hcd, HCRHPORT1 + port, RH_PS_POCI);
}
spin_unlock_irqrestore(&isp1362_hcd->lock, flags);
/* Some controllers (lucent) need extra-long delays */
hcd->state = HC_STATE_RESUMING;
mdelay(20 /* usb 11.5.1.10 */ + 15);
isp1362_hcd->hc_control = OHCI_USB_OPER;
spin_lock_irqsave(&isp1362_hcd->lock, flags);
isp1362_show_reg(isp1362_hcd, HCCONTROL);
isp1362_write_reg32(isp1362_hcd, HCCONTROL, isp1362_hcd->hc_control);
spin_unlock_irqrestore(&isp1362_hcd->lock, flags);
/* TRSMRCY */
msleep(10);
/* keep it alive for ~5x suspend + resume costs */
isp1362_hcd->next_statechange = jiffies + msecs_to_jiffies(250);
hcd->self.root_hub->dev.power.power_state = PMSG_ON;
hcd->state = HC_STATE_RUNNING;
return 0;
}
#else
#define isp1362_bus_suspend NULL
#define isp1362_bus_resume NULL
#endif
/*-------------------------------------------------------------------------*/
#ifdef STUB_DEBUG_FILE
static inline void create_debug_file(struct isp1362_hcd *isp1362_hcd)
{
}
static inline void remove_debug_file(struct isp1362_hcd *isp1362_hcd)
{
}
#else
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
static void dump_irq(struct seq_file *s, char *label, u16 mask)
{
seq_printf(s, "%-15s %04x%s%s%s%s%s%s\n", label, mask,
mask & HCuPINT_CLKRDY ? " clkrdy" : "",
mask & HCuPINT_SUSP ? " susp" : "",
mask & HCuPINT_OPR ? " opr" : "",
mask & HCuPINT_EOT ? " eot" : "",
mask & HCuPINT_ATL ? " atl" : "",
mask & HCuPINT_SOF ? " sof" : "");
}
static void dump_int(struct seq_file *s, char *label, u32 mask)
{
seq_printf(s, "%-15s %08x%s%s%s%s%s%s%s\n", label, mask,
mask & OHCI_INTR_MIE ? " MIE" : "",
mask & OHCI_INTR_RHSC ? " rhsc" : "",
mask & OHCI_INTR_FNO ? " fno" : "",
mask & OHCI_INTR_UE ? " ue" : "",
mask & OHCI_INTR_RD ? " rd" : "",
mask & OHCI_INTR_SF ? " sof" : "",
mask & OHCI_INTR_SO ? " so" : "");
}
static void dump_ctrl(struct seq_file *s, char *label, u32 mask)
{
seq_printf(s, "%-15s %08x%s%s%s\n", label, mask,
mask & OHCI_CTRL_RWC ? " rwc" : "",
mask & OHCI_CTRL_RWE ? " rwe" : "",
({
char *hcfs;
switch (mask & OHCI_CTRL_HCFS) {
case OHCI_USB_OPER:
hcfs = " oper";
break;
case OHCI_USB_RESET:
hcfs = " reset";
break;
case OHCI_USB_RESUME:
hcfs = " resume";
break;
case OHCI_USB_SUSPEND:
hcfs = " suspend";
break;
default:
hcfs = " ?";
}
hcfs;
}));
}
static void dump_regs(struct seq_file *s, struct isp1362_hcd *isp1362_hcd)
{
seq_printf(s, "HCREVISION [%02x] %08x\n", ISP1362_REG_NO(ISP1362_REG_HCREVISION),
isp1362_read_reg32(isp1362_hcd, HCREVISION));
seq_printf(s, "HCCONTROL [%02x] %08x\n", ISP1362_REG_NO(ISP1362_REG_HCCONTROL),
isp1362_read_reg32(isp1362_hcd, HCCONTROL));
seq_printf(s, "HCCMDSTAT [%02x] %08x\n", ISP1362_REG_NO(ISP1362_REG_HCCMDSTAT),
isp1362_read_reg32(isp1362_hcd, HCCMDSTAT));
seq_printf(s, "HCINTSTAT [%02x] %08x\n", ISP1362_REG_NO(ISP1362_REG_HCINTSTAT),
isp1362_read_reg32(isp1362_hcd, HCINTSTAT));
seq_printf(s, "HCINTENB [%02x] %08x\n", ISP1362_REG_NO(ISP1362_REG_HCINTENB),
isp1362_read_reg32(isp1362_hcd, HCINTENB));
seq_printf(s, "HCFMINTVL [%02x] %08x\n", ISP1362_REG_NO(ISP1362_REG_HCFMINTVL),
isp1362_read_reg32(isp1362_hcd, HCFMINTVL));
seq_printf(s, "HCFMREM [%02x] %08x\n", ISP1362_REG_NO(ISP1362_REG_HCFMREM),
isp1362_read_reg32(isp1362_hcd, HCFMREM));
seq_printf(s, "HCFMNUM [%02x] %08x\n", ISP1362_REG_NO(ISP1362_REG_HCFMNUM),
isp1362_read_reg32(isp1362_hcd, HCFMNUM));
seq_printf(s, "HCLSTHRESH [%02x] %08x\n", ISP1362_REG_NO(ISP1362_REG_HCLSTHRESH),
isp1362_read_reg32(isp1362_hcd, HCLSTHRESH));
seq_printf(s, "HCRHDESCA [%02x] %08x\n", ISP1362_REG_NO(ISP1362_REG_HCRHDESCA),
isp1362_read_reg32(isp1362_hcd, HCRHDESCA));
seq_printf(s, "HCRHDESCB [%02x] %08x\n", ISP1362_REG_NO(ISP1362_REG_HCRHDESCB),
isp1362_read_reg32(isp1362_hcd, HCRHDESCB));
seq_printf(s, "HCRHSTATUS [%02x] %08x\n", ISP1362_REG_NO(ISP1362_REG_HCRHSTATUS),
isp1362_read_reg32(isp1362_hcd, HCRHSTATUS));
seq_printf(s, "HCRHPORT1 [%02x] %08x\n", ISP1362_REG_NO(ISP1362_REG_HCRHPORT1),
isp1362_read_reg32(isp1362_hcd, HCRHPORT1));
seq_printf(s, "HCRHPORT2 [%02x] %08x\n", ISP1362_REG_NO(ISP1362_REG_HCRHPORT2),
isp1362_read_reg32(isp1362_hcd, HCRHPORT2));
seq_printf(s, "\n");
seq_printf(s, "HCHWCFG [%02x] %04x\n", ISP1362_REG_NO(ISP1362_REG_HCHWCFG),
isp1362_read_reg16(isp1362_hcd, HCHWCFG));
seq_printf(s, "HCDMACFG [%02x] %04x\n", ISP1362_REG_NO(ISP1362_REG_HCDMACFG),
isp1362_read_reg16(isp1362_hcd, HCDMACFG));
seq_printf(s, "HCXFERCTR [%02x] %04x\n", ISP1362_REG_NO(ISP1362_REG_HCXFERCTR),
isp1362_read_reg16(isp1362_hcd, HCXFERCTR));
seq_printf(s, "HCuPINT [%02x] %04x\n", ISP1362_REG_NO(ISP1362_REG_HCuPINT),
isp1362_read_reg16(isp1362_hcd, HCuPINT));
seq_printf(s, "HCuPINTENB [%02x] %04x\n", ISP1362_REG_NO(ISP1362_REG_HCuPINTENB),
isp1362_read_reg16(isp1362_hcd, HCuPINTENB));
seq_printf(s, "HCCHIPID [%02x] %04x\n", ISP1362_REG_NO(ISP1362_REG_HCCHIPID),
isp1362_read_reg16(isp1362_hcd, HCCHIPID));
seq_printf(s, "HCSCRATCH [%02x] %04x\n", ISP1362_REG_NO(ISP1362_REG_HCSCRATCH),
isp1362_read_reg16(isp1362_hcd, HCSCRATCH));
seq_printf(s, "HCBUFSTAT [%02x] %04x\n", ISP1362_REG_NO(ISP1362_REG_HCBUFSTAT),
isp1362_read_reg16(isp1362_hcd, HCBUFSTAT));
seq_printf(s, "HCDIRADDR [%02x] %08x\n", ISP1362_REG_NO(ISP1362_REG_HCDIRADDR),
isp1362_read_reg32(isp1362_hcd, HCDIRADDR));
#if 0
seq_printf(s, "HCDIRDATA [%02x] %04x\n", ISP1362_REG_NO(HCDIRDATA),
isp1362_read_reg16(isp1362_hcd, HCDIRDATA));
#endif
seq_printf(s, "HCISTLBUFSZ[%02x] %04x\n", ISP1362_REG_NO(ISP1362_REG_HCISTLBUFSZ),
isp1362_read_reg16(isp1362_hcd, HCISTLBUFSZ));
seq_printf(s, "HCISTLRATE [%02x] %04x\n", ISP1362_REG_NO(ISP1362_REG_HCISTLRATE),
isp1362_read_reg16(isp1362_hcd, HCISTLRATE));
seq_printf(s, "\n");
seq_printf(s, "HCINTLBUFSZ[%02x] %04x\n", ISP1362_REG_NO(ISP1362_REG_HCINTLBUFSZ),
isp1362_read_reg16(isp1362_hcd, HCINTLBUFSZ));
seq_printf(s, "HCINTLBLKSZ[%02x] %04x\n", ISP1362_REG_NO(ISP1362_REG_HCINTLBLKSZ),
isp1362_read_reg16(isp1362_hcd, HCINTLBLKSZ));
seq_printf(s, "HCINTLDONE [%02x] %08x\n", ISP1362_REG_NO(ISP1362_REG_HCINTLDONE),
isp1362_read_reg32(isp1362_hcd, HCINTLDONE));
seq_printf(s, "HCINTLSKIP [%02x] %08x\n", ISP1362_REG_NO(ISP1362_REG_HCINTLSKIP),
isp1362_read_reg32(isp1362_hcd, HCINTLSKIP));
seq_printf(s, "HCINTLLAST [%02x] %08x\n", ISP1362_REG_NO(ISP1362_REG_HCINTLLAST),
isp1362_read_reg32(isp1362_hcd, HCINTLLAST));
seq_printf(s, "HCINTLCURR [%02x] %04x\n", ISP1362_REG_NO(ISP1362_REG_HCINTLCURR),
isp1362_read_reg16(isp1362_hcd, HCINTLCURR));
seq_printf(s, "\n");
seq_printf(s, "HCATLBUFSZ [%02x] %04x\n", ISP1362_REG_NO(ISP1362_REG_HCATLBUFSZ),
isp1362_read_reg16(isp1362_hcd, HCATLBUFSZ));
seq_printf(s, "HCATLBLKSZ [%02x] %04x\n", ISP1362_REG_NO(ISP1362_REG_HCATLBLKSZ),
isp1362_read_reg16(isp1362_hcd, HCATLBLKSZ));
#if 0
seq_printf(s, "HCATLDONE [%02x] %08x\n", ISP1362_REG_NO(ISP1362_REG_HCATLDONE),
isp1362_read_reg32(isp1362_hcd, HCATLDONE));
#endif
seq_printf(s, "HCATLSKIP [%02x] %08x\n", ISP1362_REG_NO(ISP1362_REG_HCATLSKIP),
isp1362_read_reg32(isp1362_hcd, HCATLSKIP));
seq_printf(s, "HCATLLAST [%02x] %08x\n", ISP1362_REG_NO(ISP1362_REG_HCATLLAST),
isp1362_read_reg32(isp1362_hcd, HCATLLAST));
seq_printf(s, "HCATLCURR [%02x] %04x\n", ISP1362_REG_NO(ISP1362_REG_HCATLCURR),
isp1362_read_reg16(isp1362_hcd, HCATLCURR));
seq_printf(s, "\n");
seq_printf(s, "HCATLDTC [%02x] %04x\n", ISP1362_REG_NO(ISP1362_REG_HCATLDTC),
isp1362_read_reg16(isp1362_hcd, HCATLDTC));
seq_printf(s, "HCATLDTCTO [%02x] %04x\n", ISP1362_REG_NO(ISP1362_REG_HCATLDTCTO),
isp1362_read_reg16(isp1362_hcd, HCATLDTCTO));
}
static int proc_isp1362_show(struct seq_file *s, void *unused)
{
struct isp1362_hcd *isp1362_hcd = s->private;
struct isp1362_ep *ep;
int i;
seq_printf(s, "%s\n%s version %s\n",
isp1362_hcd_to_hcd(isp1362_hcd)->product_desc, hcd_name, DRIVER_VERSION);
/* collect statistics to help estimate potential win for
* DMA engines that care about alignment (PXA)
*/
seq_printf(s, "alignment: 16b/%ld 8b/%ld 4b/%ld 2b/%ld 1b/%ld\n",
isp1362_hcd->stat16, isp1362_hcd->stat8, isp1362_hcd->stat4,
isp1362_hcd->stat2, isp1362_hcd->stat1);
seq_printf(s, "max # ptds in ATL fifo: %d\n", isp1362_hcd->atl_queue.stat_maxptds);
seq_printf(s, "max # ptds in INTL fifo: %d\n", isp1362_hcd->intl_queue.stat_maxptds);
seq_printf(s, "max # ptds in ISTL fifo: %d\n",
max(isp1362_hcd->istl_queue[0] .stat_maxptds,
isp1362_hcd->istl_queue[1] .stat_maxptds));
/* FIXME: don't show the following in suspended state */
spin_lock_irq(&isp1362_hcd->lock);
dump_irq(s, "hc_irq_enable", isp1362_read_reg16(isp1362_hcd, HCuPINTENB));
dump_irq(s, "hc_irq_status", isp1362_read_reg16(isp1362_hcd, HCuPINT));
dump_int(s, "ohci_int_enable", isp1362_read_reg32(isp1362_hcd, HCINTENB));
dump_int(s, "ohci_int_status", isp1362_read_reg32(isp1362_hcd, HCINTSTAT));
dump_ctrl(s, "ohci_control", isp1362_read_reg32(isp1362_hcd, HCCONTROL));
for (i = 0; i < NUM_ISP1362_IRQS; i++)
if (isp1362_hcd->irq_stat[i])
seq_printf(s, "%-15s: %d\n",
ISP1362_INT_NAME(i), isp1362_hcd->irq_stat[i]);
dump_regs(s, isp1362_hcd);
list_for_each_entry(ep, &isp1362_hcd->async, schedule) {
struct urb *urb;
seq_printf(s, "%p, ep%d%s, maxpacket %d:\n", ep, ep->epnum,
({
char *s;
switch (ep->nextpid) {
case USB_PID_IN:
s = "in";
break;
case USB_PID_OUT:
s = "out";
break;
case USB_PID_SETUP:
s = "setup";
break;
case USB_PID_ACK:
s = "status";
break;
default:
s = "?";
break;
};
s;}), ep->maxpacket) ;
list_for_each_entry(urb, &ep->hep->urb_list, urb_list) {
seq_printf(s, " urb%p, %d/%d\n", urb,
urb->actual_length,
urb->transfer_buffer_length);
}
}
if (!list_empty(&isp1362_hcd->async))
seq_printf(s, "\n");
dump_ptd_queue(&isp1362_hcd->atl_queue);
seq_printf(s, "periodic size= %d\n", PERIODIC_SIZE);
list_for_each_entry(ep, &isp1362_hcd->periodic, schedule) {
seq_printf(s, "branch:%2d load:%3d PTD[%d] $%04x:\n", ep->branch,
isp1362_hcd->load[ep->branch], ep->ptd_index, ep->ptd_offset);
seq_printf(s, " %d/%p (%sdev%d ep%d%s max %d)\n",
ep->interval, ep,
(ep->udev->speed == USB_SPEED_FULL) ? "" : "ls ",
ep->udev->devnum, ep->epnum,
(ep->epnum == 0) ? "" :
((ep->nextpid == USB_PID_IN) ?
"in" : "out"), ep->maxpacket);
}
dump_ptd_queue(&isp1362_hcd->intl_queue);
seq_printf(s, "ISO:\n");
list_for_each_entry(ep, &isp1362_hcd->isoc, schedule) {
seq_printf(s, " %d/%p (%sdev%d ep%d%s max %d)\n",
ep->interval, ep,
(ep->udev->speed == USB_SPEED_FULL) ? "" : "ls ",
ep->udev->devnum, ep->epnum,
(ep->epnum == 0) ? "" :
((ep->nextpid == USB_PID_IN) ?
"in" : "out"), ep->maxpacket);
}
spin_unlock_irq(&isp1362_hcd->lock);
seq_printf(s, "\n");
return 0;
}
static int proc_isp1362_open(struct inode *inode, struct file *file)
{
return single_open(file, proc_isp1362_show, PDE(inode)->data);
}
static const struct file_operations proc_ops = {
.open = proc_isp1362_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
};
/* expect just one isp1362_hcd per system */
static const char proc_filename[] = "driver/isp1362";
static void create_debug_file(struct isp1362_hcd *isp1362_hcd)
{
struct proc_dir_entry *pde;
pde = create_proc_entry(proc_filename, 0, NULL);
if (pde == NULL) {
pr_warning("%s: Failed to create debug file '%s'\n", __func__, proc_filename);
return;
}
pde->proc_fops = &proc_ops;
pde->data = isp1362_hcd;
isp1362_hcd->pde = pde;
}
static void remove_debug_file(struct isp1362_hcd *isp1362_hcd)
{
if (isp1362_hcd->pde)
remove_proc_entry(proc_filename, NULL);
}
#endif
/*-------------------------------------------------------------------------*/
static void __isp1362_sw_reset(struct isp1362_hcd *isp1362_hcd)
{
int tmp = 20;
isp1362_write_reg16(isp1362_hcd, HCSWRES, HCSWRES_MAGIC);
isp1362_write_reg32(isp1362_hcd, HCCMDSTAT, OHCI_HCR);
while (--tmp) {
mdelay(1);
if (!(isp1362_read_reg32(isp1362_hcd, HCCMDSTAT) & OHCI_HCR))
break;
}
if (!tmp)
pr_err("Software reset timeout\n");
}
static void isp1362_sw_reset(struct isp1362_hcd *isp1362_hcd)
{
unsigned long flags;
spin_lock_irqsave(&isp1362_hcd->lock, flags);
__isp1362_sw_reset(isp1362_hcd);
spin_unlock_irqrestore(&isp1362_hcd->lock, flags);
}
static int isp1362_mem_config(struct usb_hcd *hcd)
{
struct isp1362_hcd *isp1362_hcd = hcd_to_isp1362_hcd(hcd);
unsigned long flags;
u32 total;
u16 istl_size = ISP1362_ISTL_BUFSIZE;
u16 intl_blksize = ISP1362_INTL_BLKSIZE + PTD_HEADER_SIZE;
u16 intl_size = ISP1362_INTL_BUFFERS * intl_blksize;
u16 atl_blksize = ISP1362_ATL_BLKSIZE + PTD_HEADER_SIZE;
u16 atl_buffers = (ISP1362_BUF_SIZE - (istl_size + intl_size)) / atl_blksize;
u16 atl_size;
int i;
WARN_ON(istl_size & 3);
WARN_ON(atl_blksize & 3);
WARN_ON(intl_blksize & 3);
WARN_ON(atl_blksize < PTD_HEADER_SIZE);
WARN_ON(intl_blksize < PTD_HEADER_SIZE);
BUG_ON((unsigned)ISP1362_INTL_BUFFERS > 32);
if (atl_buffers > 32)
atl_buffers = 32;
atl_size = atl_buffers * atl_blksize;
total = atl_size + intl_size + istl_size;
dev_info(hcd->self.controller, "ISP1362 Memory usage:\n");
dev_info(hcd->self.controller, " ISTL: 2 * %4d: %4d @ $%04x:$%04x\n",
istl_size / 2, istl_size, 0, istl_size / 2);
dev_info(hcd->self.controller, " INTL: %4d * (%3zu+8): %4d @ $%04x\n",
ISP1362_INTL_BUFFERS, intl_blksize - PTD_HEADER_SIZE,
intl_size, istl_size);
dev_info(hcd->self.controller, " ATL : %4d * (%3zu+8): %4d @ $%04x\n",
atl_buffers, atl_blksize - PTD_HEADER_SIZE,
atl_size, istl_size + intl_size);
dev_info(hcd->self.controller, " USED/FREE: %4d %4d\n", total,
ISP1362_BUF_SIZE - total);
if (total > ISP1362_BUF_SIZE) {
dev_err(hcd->self.controller, "%s: Memory requested: %d, available %d\n",
__func__, total, ISP1362_BUF_SIZE);
return -ENOMEM;
}
total = istl_size + intl_size + atl_size;
spin_lock_irqsave(&isp1362_hcd->lock, flags);
for (i = 0; i < 2; i++) {
isp1362_hcd->istl_queue[i].buf_start = i * istl_size / 2,
isp1362_hcd->istl_queue[i].buf_size = istl_size / 2;
isp1362_hcd->istl_queue[i].blk_size = 4;
INIT_LIST_HEAD(&isp1362_hcd->istl_queue[i].active);
snprintf(isp1362_hcd->istl_queue[i].name,
sizeof(isp1362_hcd->istl_queue[i].name), "ISTL%d", i);
DBG(3, "%s: %5s buf $%04x %d\n", __func__,
isp1362_hcd->istl_queue[i].name,
isp1362_hcd->istl_queue[i].buf_start,
isp1362_hcd->istl_queue[i].buf_size);
}
isp1362_write_reg16(isp1362_hcd, HCISTLBUFSZ, istl_size / 2);
isp1362_hcd->intl_queue.buf_start = istl_size;
isp1362_hcd->intl_queue.buf_size = intl_size;
isp1362_hcd->intl_queue.buf_count = ISP1362_INTL_BUFFERS;
isp1362_hcd->intl_queue.blk_size = intl_blksize;
isp1362_hcd->intl_queue.buf_avail = isp1362_hcd->intl_queue.buf_count;
isp1362_hcd->intl_queue.skip_map = ~0;
INIT_LIST_HEAD(&isp1362_hcd->intl_queue.active);
isp1362_write_reg16(isp1362_hcd, HCINTLBUFSZ,
isp1362_hcd->intl_queue.buf_size);
isp1362_write_reg16(isp1362_hcd, HCINTLBLKSZ,
isp1362_hcd->intl_queue.blk_size - PTD_HEADER_SIZE);
isp1362_write_reg32(isp1362_hcd, HCINTLSKIP, ~0);
isp1362_write_reg32(isp1362_hcd, HCINTLLAST,
1 << (ISP1362_INTL_BUFFERS - 1));
isp1362_hcd->atl_queue.buf_start = istl_size + intl_size;
isp1362_hcd->atl_queue.buf_size = atl_size;
isp1362_hcd->atl_queue.buf_count = atl_buffers;
isp1362_hcd->atl_queue.blk_size = atl_blksize;
isp1362_hcd->atl_queue.buf_avail = isp1362_hcd->atl_queue.buf_count;
isp1362_hcd->atl_queue.skip_map = ~0;
INIT_LIST_HEAD(&isp1362_hcd->atl_queue.active);
isp1362_write_reg16(isp1362_hcd, HCATLBUFSZ,
isp1362_hcd->atl_queue.buf_size);
isp1362_write_reg16(isp1362_hcd, HCATLBLKSZ,
isp1362_hcd->atl_queue.blk_size - PTD_HEADER_SIZE);
isp1362_write_reg32(isp1362_hcd, HCATLSKIP, ~0);
isp1362_write_reg32(isp1362_hcd, HCATLLAST,
1 << (atl_buffers - 1));
snprintf(isp1362_hcd->atl_queue.name,
sizeof(isp1362_hcd->atl_queue.name), "ATL");
snprintf(isp1362_hcd->intl_queue.name,
sizeof(isp1362_hcd->intl_queue.name), "INTL");
DBG(3, "%s: %5s buf $%04x %2d * %4d = %4d\n", __func__,
isp1362_hcd->intl_queue.name,
isp1362_hcd->intl_queue.buf_start,
ISP1362_INTL_BUFFERS, isp1362_hcd->intl_queue.blk_size,
isp1362_hcd->intl_queue.buf_size);
DBG(3, "%s: %5s buf $%04x %2d * %4d = %4d\n", __func__,
isp1362_hcd->atl_queue.name,
isp1362_hcd->atl_queue.buf_start,
atl_buffers, isp1362_hcd->atl_queue.blk_size,
isp1362_hcd->atl_queue.buf_size);
spin_unlock_irqrestore(&isp1362_hcd->lock, flags);
return 0;
}
static int isp1362_hc_reset(struct usb_hcd *hcd)
{
int ret = 0;
struct isp1362_hcd *isp1362_hcd = hcd_to_isp1362_hcd(hcd);
unsigned long t;
unsigned long timeout = 100;
unsigned long flags;
int clkrdy = 0;
pr_info("%s:\n", __func__);
if (isp1362_hcd->board && isp1362_hcd->board->reset) {
isp1362_hcd->board->reset(hcd->self.controller, 1);
msleep(20);
if (isp1362_hcd->board->clock)
isp1362_hcd->board->clock(hcd->self.controller, 1);
isp1362_hcd->board->reset(hcd->self.controller, 0);
} else
isp1362_sw_reset(isp1362_hcd);
/* chip has been reset. First we need to see a clock */
t = jiffies + msecs_to_jiffies(timeout);
while (!clkrdy && time_before_eq(jiffies, t)) {
spin_lock_irqsave(&isp1362_hcd->lock, flags);
clkrdy = isp1362_read_reg16(isp1362_hcd, HCuPINT) & HCuPINT_CLKRDY;
spin_unlock_irqrestore(&isp1362_hcd->lock, flags);
if (!clkrdy)
msleep(4);
}
spin_lock_irqsave(&isp1362_hcd->lock, flags);
isp1362_write_reg16(isp1362_hcd, HCuPINT, HCuPINT_CLKRDY);
spin_unlock_irqrestore(&isp1362_hcd->lock, flags);
if (!clkrdy) {
pr_err("Clock not ready after %lums\n", timeout);
ret = -ENODEV;
}
return ret;
}
static void isp1362_hc_stop(struct usb_hcd *hcd)
{
struct isp1362_hcd *isp1362_hcd = hcd_to_isp1362_hcd(hcd);
unsigned long flags;
u32 tmp;
pr_info("%s:\n", __func__);
del_timer_sync(&hcd->rh_timer);
spin_lock_irqsave(&isp1362_hcd->lock, flags);
isp1362_write_reg16(isp1362_hcd, HCuPINTENB, 0);
/* Switch off power for all ports */
tmp = isp1362_read_reg32(isp1362_hcd, HCRHDESCA);
tmp &= ~(RH_A_NPS | RH_A_PSM);
isp1362_write_reg32(isp1362_hcd, HCRHDESCA, tmp);
isp1362_write_reg32(isp1362_hcd, HCRHSTATUS, RH_HS_LPS);
/* Reset the chip */
if (isp1362_hcd->board && isp1362_hcd->board->reset)
isp1362_hcd->board->reset(hcd->self.controller, 1);
else
__isp1362_sw_reset(isp1362_hcd);
if (isp1362_hcd->board && isp1362_hcd->board->clock)
isp1362_hcd->board->clock(hcd->self.controller, 0);
spin_unlock_irqrestore(&isp1362_hcd->lock, flags);
}
#ifdef CHIP_BUFFER_TEST
static int isp1362_chip_test(struct isp1362_hcd *isp1362_hcd)
{
int ret = 0;
u16 *ref;
unsigned long flags;
ref = kmalloc(2 * ISP1362_BUF_SIZE, GFP_KERNEL);
if (ref) {
int offset;
u16 *tst = &ref[ISP1362_BUF_SIZE / 2];
for (offset = 0; offset < ISP1362_BUF_SIZE / 2; offset++) {
ref[offset] = ~offset;
tst[offset] = offset;
}
for (offset = 0; offset < 4; offset++) {
int j;
for (j = 0; j < 8; j++) {
spin_lock_irqsave(&isp1362_hcd->lock, flags);
isp1362_write_buffer(isp1362_hcd, (u8 *)ref + offset, 0, j);
isp1362_read_buffer(isp1362_hcd, (u8 *)tst + offset, 0, j);
spin_unlock_irqrestore(&isp1362_hcd->lock, flags);
if (memcmp(ref, tst, j)) {
ret = -ENODEV;
pr_err("%s: memory check with %d byte offset %d failed\n",
__func__, j, offset);
dump_data((u8 *)ref + offset, j);
dump_data((u8 *)tst + offset, j);
}
}
}
spin_lock_irqsave(&isp1362_hcd->lock, flags);
isp1362_write_buffer(isp1362_hcd, ref, 0, ISP1362_BUF_SIZE);
isp1362_read_buffer(isp1362_hcd, tst, 0, ISP1362_BUF_SIZE);
spin_unlock_irqrestore(&isp1362_hcd->lock, flags);
if (memcmp(ref, tst, ISP1362_BUF_SIZE)) {
ret = -ENODEV;
pr_err("%s: memory check failed\n", __func__);
dump_data((u8 *)tst, ISP1362_BUF_SIZE / 2);
}
for (offset = 0; offset < 256; offset++) {
int test_size = 0;
yield();
memset(tst, 0, ISP1362_BUF_SIZE);
spin_lock_irqsave(&isp1362_hcd->lock, flags);
isp1362_write_buffer(isp1362_hcd, tst, 0, ISP1362_BUF_SIZE);
isp1362_read_buffer(isp1362_hcd, tst, 0, ISP1362_BUF_SIZE);
spin_unlock_irqrestore(&isp1362_hcd->lock, flags);
if (memcmp(tst, tst + (ISP1362_BUF_SIZE / (2 * sizeof(*tst))),
ISP1362_BUF_SIZE / 2)) {
pr_err("%s: Failed to clear buffer\n", __func__);
dump_data((u8 *)tst, ISP1362_BUF_SIZE);
break;
}
spin_lock_irqsave(&isp1362_hcd->lock, flags);
isp1362_write_buffer(isp1362_hcd, ref, offset * 2, PTD_HEADER_SIZE);
isp1362_write_buffer(isp1362_hcd, ref + PTD_HEADER_SIZE / sizeof(*ref),
offset * 2 + PTD_HEADER_SIZE, test_size);
isp1362_read_buffer(isp1362_hcd, tst, offset * 2,
PTD_HEADER_SIZE + test_size);
spin_unlock_irqrestore(&isp1362_hcd->lock, flags);
if (memcmp(ref, tst, PTD_HEADER_SIZE + test_size)) {
dump_data(((u8 *)ref) + offset, PTD_HEADER_SIZE + test_size);
dump_data((u8 *)tst, PTD_HEADER_SIZE + test_size);
spin_lock_irqsave(&isp1362_hcd->lock, flags);
isp1362_read_buffer(isp1362_hcd, tst, offset * 2,
PTD_HEADER_SIZE + test_size);
spin_unlock_irqrestore(&isp1362_hcd->lock, flags);
if (memcmp(ref, tst, PTD_HEADER_SIZE + test_size)) {
ret = -ENODEV;
pr_err("%s: memory check with offset %02x failed\n",
__func__, offset);
break;
}
pr_warning("%s: memory check with offset %02x ok after second read\n",
__func__, offset);
}
}
kfree(ref);
}
return ret;
}
#endif
static int isp1362_hc_start(struct usb_hcd *hcd)
{
int ret;
struct isp1362_hcd *isp1362_hcd = hcd_to_isp1362_hcd(hcd);
struct isp1362_platform_data *board = isp1362_hcd->board;
u16 hwcfg;
u16 chipid;
unsigned long flags;
pr_info("%s:\n", __func__);
spin_lock_irqsave(&isp1362_hcd->lock, flags);
chipid = isp1362_read_reg16(isp1362_hcd, HCCHIPID);
spin_unlock_irqrestore(&isp1362_hcd->lock, flags);
if ((chipid & HCCHIPID_MASK) != HCCHIPID_MAGIC) {
pr_err("%s: Invalid chip ID %04x\n", __func__, chipid);
return -ENODEV;
}
#ifdef CHIP_BUFFER_TEST
ret = isp1362_chip_test(isp1362_hcd);
if (ret)
return -ENODEV;
#endif
spin_lock_irqsave(&isp1362_hcd->lock, flags);
/* clear interrupt status and disable all interrupt sources */
isp1362_write_reg16(isp1362_hcd, HCuPINT, 0xff);
isp1362_write_reg16(isp1362_hcd, HCuPINTENB, 0);
/* HW conf */
hwcfg = HCHWCFG_INT_ENABLE | HCHWCFG_DBWIDTH(1);
if (board->sel15Kres)
hwcfg |= HCHWCFG_PULLDOWN_DS2 |
((MAX_ROOT_PORTS > 1) ? HCHWCFG_PULLDOWN_DS1 : 0);
if (board->clknotstop)
hwcfg |= HCHWCFG_CLKNOTSTOP;
if (board->oc_enable)
hwcfg |= HCHWCFG_ANALOG_OC;
if (board->int_act_high)
hwcfg |= HCHWCFG_INT_POL;
if (board->int_edge_triggered)
hwcfg |= HCHWCFG_INT_TRIGGER;
if (board->dreq_act_high)
hwcfg |= HCHWCFG_DREQ_POL;
if (board->dack_act_high)
hwcfg |= HCHWCFG_DACK_POL;
isp1362_write_reg16(isp1362_hcd, HCHWCFG, hwcfg);
isp1362_show_reg(isp1362_hcd, HCHWCFG);
isp1362_write_reg16(isp1362_hcd, HCDMACFG, 0);
spin_unlock_irqrestore(&isp1362_hcd->lock, flags);
ret = isp1362_mem_config(hcd);
if (ret)
return ret;
spin_lock_irqsave(&isp1362_hcd->lock, flags);
/* Root hub conf */
isp1362_hcd->rhdesca = 0;
if (board->no_power_switching)
isp1362_hcd->rhdesca |= RH_A_NPS;
if (board->power_switching_mode)
isp1362_hcd->rhdesca |= RH_A_PSM;
if (board->potpg)
isp1362_hcd->rhdesca |= (board->potpg << 24) & RH_A_POTPGT;
else
isp1362_hcd->rhdesca |= (25 << 24) & RH_A_POTPGT;
isp1362_write_reg32(isp1362_hcd, HCRHDESCA, isp1362_hcd->rhdesca & ~RH_A_OCPM);
isp1362_write_reg32(isp1362_hcd, HCRHDESCA, isp1362_hcd->rhdesca | RH_A_OCPM);
isp1362_hcd->rhdesca = isp1362_read_reg32(isp1362_hcd, HCRHDESCA);
isp1362_hcd->rhdescb = RH_B_PPCM;
isp1362_write_reg32(isp1362_hcd, HCRHDESCB, isp1362_hcd->rhdescb);
isp1362_hcd->rhdescb = isp1362_read_reg32(isp1362_hcd, HCRHDESCB);
isp1362_read_reg32(isp1362_hcd, HCFMINTVL);
isp1362_write_reg32(isp1362_hcd, HCFMINTVL, (FSMP(FI) << 16) | FI);
isp1362_write_reg32(isp1362_hcd, HCLSTHRESH, LSTHRESH);
spin_unlock_irqrestore(&isp1362_hcd->lock, flags);
isp1362_hcd->hc_control = OHCI_USB_OPER;
hcd->state = HC_STATE_RUNNING;
spin_lock_irqsave(&isp1362_hcd->lock, flags);
/* Set up interrupts */
isp1362_hcd->intenb = OHCI_INTR_MIE | OHCI_INTR_RHSC | OHCI_INTR_UE;
isp1362_hcd->intenb |= OHCI_INTR_RD;
isp1362_hcd->irqenb = HCuPINT_OPR | HCuPINT_SUSP;
isp1362_write_reg32(isp1362_hcd, HCINTENB, isp1362_hcd->intenb);
isp1362_write_reg16(isp1362_hcd, HCuPINTENB, isp1362_hcd->irqenb);
/* Go operational */
isp1362_write_reg32(isp1362_hcd, HCCONTROL, isp1362_hcd->hc_control);
/* enable global power */
isp1362_write_reg32(isp1362_hcd, HCRHSTATUS, RH_HS_LPSC | RH_HS_DRWE);
spin_unlock_irqrestore(&isp1362_hcd->lock, flags);
return 0;
}
/*-------------------------------------------------------------------------*/
static struct hc_driver isp1362_hc_driver = {
.description = hcd_name,
.product_desc = "ISP1362 Host Controller",
.hcd_priv_size = sizeof(struct isp1362_hcd),
.irq = isp1362_irq,
.flags = HCD_USB11 | HCD_MEMORY,
.reset = isp1362_hc_reset,
.start = isp1362_hc_start,
.stop = isp1362_hc_stop,
.urb_enqueue = isp1362_urb_enqueue,
.urb_dequeue = isp1362_urb_dequeue,
.endpoint_disable = isp1362_endpoint_disable,
.get_frame_number = isp1362_get_frame,
.hub_status_data = isp1362_hub_status_data,
.hub_control = isp1362_hub_control,
.bus_suspend = isp1362_bus_suspend,
.bus_resume = isp1362_bus_resume,
};
/*-------------------------------------------------------------------------*/
static int __devexit isp1362_remove(struct platform_device *pdev)
{
struct usb_hcd *hcd = platform_get_drvdata(pdev);
struct isp1362_hcd *isp1362_hcd = hcd_to_isp1362_hcd(hcd);
struct resource *res;
remove_debug_file(isp1362_hcd);
DBG(0, "%s: Removing HCD\n", __func__);
usb_remove_hcd(hcd);
DBG(0, "%s: Unmapping data_reg @ %p\n", __func__,
isp1362_hcd->data_reg);
iounmap(isp1362_hcd->data_reg);
DBG(0, "%s: Unmapping addr_reg @ %p\n", __func__,
isp1362_hcd->addr_reg);
iounmap(isp1362_hcd->addr_reg);
res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
DBG(0, "%s: release mem_region: %08lx\n", __func__, (long unsigned int)res->start);
if (res)
release_mem_region(res->start, resource_size(res));
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
DBG(0, "%s: release mem_region: %08lx\n", __func__, (long unsigned int)res->start);
if (res)
release_mem_region(res->start, resource_size(res));
DBG(0, "%s: put_hcd\n", __func__);
usb_put_hcd(hcd);
DBG(0, "%s: Done\n", __func__);
return 0;
}
static int __devinit isp1362_probe(struct platform_device *pdev)
{
struct usb_hcd *hcd;
struct isp1362_hcd *isp1362_hcd;
struct resource *addr, *data;
void __iomem *addr_reg;
void __iomem *data_reg;
int irq;
int retval = 0;
struct resource *irq_res;
unsigned int irq_flags = 0;
/* basic sanity checks first. board-specific init logic should
* have initialized this the three resources and probably board
* specific platform_data. we don't probe for IRQs, and do only
* minimal sanity checking.
*/
if (pdev->num_resources < 3) {
retval = -ENODEV;
goto err1;
}
data = platform_get_resource(pdev, IORESOURCE_MEM, 0);
addr = platform_get_resource(pdev, IORESOURCE_MEM, 1);
irq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
if (!addr || !data || !irq_res) {
retval = -ENODEV;
goto err1;
}
irq = irq_res->start;
if (pdev->dev.dma_mask) {
DBG(1, "won't do DMA");
retval = -ENODEV;
goto err1;
}
if (!request_mem_region(addr->start, resource_size(addr), hcd_name)) {
retval = -EBUSY;
goto err1;
}
addr_reg = ioremap(addr->start, resource_size(addr));
if (addr_reg == NULL) {
retval = -ENOMEM;
goto err2;
}
if (!request_mem_region(data->start, resource_size(data), hcd_name)) {
retval = -EBUSY;
goto err3;
}
data_reg = ioremap(data->start, resource_size(data));
if (data_reg == NULL) {
retval = -ENOMEM;
goto err4;
}
/* allocate and initialize hcd */
hcd = usb_create_hcd(&isp1362_hc_driver, &pdev->dev, dev_name(&pdev->dev));
if (!hcd) {
retval = -ENOMEM;
goto err5;
}
hcd->rsrc_start = data->start;
isp1362_hcd = hcd_to_isp1362_hcd(hcd);
isp1362_hcd->data_reg = data_reg;
isp1362_hcd->addr_reg = addr_reg;
isp1362_hcd->next_statechange = jiffies;
spin_lock_init(&isp1362_hcd->lock);
INIT_LIST_HEAD(&isp1362_hcd->async);
INIT_LIST_HEAD(&isp1362_hcd->periodic);
INIT_LIST_HEAD(&isp1362_hcd->isoc);
INIT_LIST_HEAD(&isp1362_hcd->remove_list);
isp1362_hcd->board = pdev->dev.platform_data;
#if USE_PLATFORM_DELAY
if (!isp1362_hcd->board->delay) {
dev_err(hcd->self.controller, "No platform delay function given\n");
retval = -ENODEV;
goto err6;
}
#endif
if (irq_res->flags & IORESOURCE_IRQ_HIGHEDGE)
irq_flags |= IRQF_TRIGGER_RISING;
if (irq_res->flags & IORESOURCE_IRQ_LOWEDGE)
irq_flags |= IRQF_TRIGGER_FALLING;
if (irq_res->flags & IORESOURCE_IRQ_HIGHLEVEL)
irq_flags |= IRQF_TRIGGER_HIGH;
if (irq_res->flags & IORESOURCE_IRQ_LOWLEVEL)
irq_flags |= IRQF_TRIGGER_LOW;
retval = usb_add_hcd(hcd, irq, irq_flags | IRQF_DISABLED | IRQF_SHARED);
if (retval != 0)
goto err6;
pr_info("%s, irq %d\n", hcd->product_desc, irq);
create_debug_file(isp1362_hcd);
return 0;
err6:
DBG(0, "%s: Freeing dev %p\n", __func__, isp1362_hcd);
usb_put_hcd(hcd);
err5:
DBG(0, "%s: Unmapping data_reg @ %p\n", __func__, data_reg);
iounmap(data_reg);
err4:
DBG(0, "%s: Releasing mem region %08lx\n", __func__, (long unsigned int)data->start);
release_mem_region(data->start, resource_size(data));
err3:
DBG(0, "%s: Unmapping addr_reg @ %p\n", __func__, addr_reg);
iounmap(addr_reg);
err2:
DBG(0, "%s: Releasing mem region %08lx\n", __func__, (long unsigned int)addr->start);
release_mem_region(addr->start, resource_size(addr));
err1:
pr_err("%s: init error, %d\n", __func__, retval);
return retval;
}
#ifdef CONFIG_PM
static int isp1362_suspend(struct platform_device *pdev, pm_message_t state)
{
struct usb_hcd *hcd = platform_get_drvdata(pdev);
struct isp1362_hcd *isp1362_hcd = hcd_to_isp1362_hcd(hcd);
unsigned long flags;
int retval = 0;
DBG(0, "%s: Suspending device\n", __func__);
if (state.event == PM_EVENT_FREEZE) {
DBG(0, "%s: Suspending root hub\n", __func__);
retval = isp1362_bus_suspend(hcd);
} else {
DBG(0, "%s: Suspending RH ports\n", __func__);
spin_lock_irqsave(&isp1362_hcd->lock, flags);
isp1362_write_reg32(isp1362_hcd, HCRHSTATUS, RH_HS_LPS);
spin_unlock_irqrestore(&isp1362_hcd->lock, flags);
}
if (retval == 0)
pdev->dev.power.power_state = state;
return retval;
}
static int isp1362_resume(struct platform_device *pdev)
{
struct usb_hcd *hcd = platform_get_drvdata(pdev);
struct isp1362_hcd *isp1362_hcd = hcd_to_isp1362_hcd(hcd);
unsigned long flags;
DBG(0, "%s: Resuming\n", __func__);
if (pdev->dev.power.power_state.event == PM_EVENT_SUSPEND) {
DBG(0, "%s: Resume RH ports\n", __func__);
spin_lock_irqsave(&isp1362_hcd->lock, flags);
isp1362_write_reg32(isp1362_hcd, HCRHSTATUS, RH_HS_LPSC);
spin_unlock_irqrestore(&isp1362_hcd->lock, flags);
return 0;
}
pdev->dev.power.power_state = PMSG_ON;
return isp1362_bus_resume(isp1362_hcd_to_hcd(isp1362_hcd));
}
#else
#define isp1362_suspend NULL
#define isp1362_resume NULL
#endif
static struct platform_driver isp1362_driver = {
.probe = isp1362_probe,
.remove = __devexit_p(isp1362_remove),
.suspend = isp1362_suspend,
.resume = isp1362_resume,
.driver = {
.name = (char *)hcd_name,
.owner = THIS_MODULE,
},
};
/*-------------------------------------------------------------------------*/
static int __init isp1362_init(void)
{
if (usb_disabled())
return -ENODEV;
pr_info("driver %s, %s\n", hcd_name, DRIVER_VERSION);
return platform_driver_register(&isp1362_driver);
}
module_init(isp1362_init);
static void __exit isp1362_cleanup(void)
{
platform_driver_unregister(&isp1362_driver);
}
module_exit(isp1362_cleanup);
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