usb: isp1760: Move driver from drivers/usb/host/ to drivers/usb/isp1760/

Now that this is DRD, it doesn't make sense to keep it under
drivers/usb/host.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>

1 files changed, 0 insertions, 2231 deletions

diff --git a/drivers/usb/host/isp1760-hcd.c b/drivers/usb/host/isp1760-hcd.c
deleted file mode 100644
index 568446c9ce8d..000000000000
--- a/drivers/usb/host/isp1760-hcd.c
+++ /dev/null
@@ -1,2231 +0,0 @@
-/*
- * Driver for the NXP ISP1760 chip
- *
- * However, the code might contain some bugs. What doesn't work for sure is:
- * - ISO
- * - OTG
- e The interrupt line is configured as active low, level.
- *
- * (c) 2007 Sebastian Siewior <bigeasy@linutronix.de>
- *
- * (c) 2011 Arvid Brodin <arvid.brodin@enea.com>
- *
- */
-#include <linux/gpio/consumer.h>
-#include <linux/module.h>
-#include <linux/kernel.h>
-#include <linux/slab.h>
-#include <linux/list.h>
-#include <linux/usb.h>
-#include <linux/usb/hcd.h>
-#include <linux/debugfs.h>
-#include <linux/uaccess.h>
-#include <linux/io.h>
-#include <linux/mm.h>
-#include <linux/timer.h>
-#include <asm/unaligned.h>
-#include <asm/cacheflush.h>
-
-#include "isp1760-core.h"
-#include "isp1760-hcd.h"
-#include "isp1760-regs.h"
-
-static struct kmem_cache *qtd_cachep;
-static struct kmem_cache *qh_cachep;
-static struct kmem_cache *urb_listitem_cachep;
-
-typedef void (packet_enqueue)(struct usb_hcd *hcd, struct isp1760_qh *qh,
-		struct isp1760_qtd *qtd);
-
-static inline struct isp1760_hcd *hcd_to_priv(struct usb_hcd *hcd)
-{
-	return *(struct isp1760_hcd **)hcd->hcd_priv;
-}
-
-/* urb state*/
-#define DELETE_URB		(0x0008)
-#define NO_TRANSFER_ACTIVE	(0xffffffff)
-
-/* Philips Proprietary Transfer Descriptor (PTD) */
-typedef __u32 __bitwise __dw;
-struct ptd {
-	__dw dw0;
-	__dw dw1;
-	__dw dw2;
-	__dw dw3;
-	__dw dw4;
-	__dw dw5;
-	__dw dw6;
-	__dw dw7;
-};
-#define PTD_OFFSET		0x0400
-#define ISO_PTD_OFFSET		0x0400
-#define INT_PTD_OFFSET		0x0800
-#define ATL_PTD_OFFSET		0x0c00
-#define PAYLOAD_OFFSET		0x1000
-
-
-/* ATL */
-/* DW0 */
-#define DW0_VALID_BIT			1
-#define FROM_DW0_VALID(x)		((x) & 0x01)
-#define TO_DW0_LENGTH(x)		(((u32) x) << 3)
-#define TO_DW0_MAXPACKET(x)		(((u32) x) << 18)
-#define TO_DW0_MULTI(x)			(((u32) x) << 29)
-#define TO_DW0_ENDPOINT(x)		(((u32)	x) << 31)
-/* DW1 */
-#define TO_DW1_DEVICE_ADDR(x)		(((u32) x) << 3)
-#define TO_DW1_PID_TOKEN(x)		(((u32) x) << 10)
-#define DW1_TRANS_BULK			((u32) 2 << 12)
-#define DW1_TRANS_INT			((u32) 3 << 12)
-#define DW1_TRANS_SPLIT			((u32) 1 << 14)
-#define DW1_SE_USB_LOSPEED		((u32) 2 << 16)
-#define TO_DW1_PORT_NUM(x)		(((u32) x) << 18)
-#define TO_DW1_HUB_NUM(x)		(((u32) x) << 25)
-/* DW2 */
-#define TO_DW2_DATA_START_ADDR(x)	(((u32) x) << 8)
-#define TO_DW2_RL(x)			((x) << 25)
-#define FROM_DW2_RL(x)			(((x) >> 25) & 0xf)
-/* DW3 */
-#define FROM_DW3_NRBYTESTRANSFERRED(x)		((x) & 0x7fff)
-#define FROM_DW3_SCS_NRBYTESTRANSFERRED(x)	((x) & 0x07ff)
-#define TO_DW3_NAKCOUNT(x)		((x) << 19)
-#define FROM_DW3_NAKCOUNT(x)		(((x) >> 19) & 0xf)
-#define TO_DW3_CERR(x)			((x) << 23)
-#define FROM_DW3_CERR(x)		(((x) >> 23) & 0x3)
-#define TO_DW3_DATA_TOGGLE(x)		((x) << 25)
-#define FROM_DW3_DATA_TOGGLE(x)		(((x) >> 25) & 0x1)
-#define TO_DW3_PING(x)			((x) << 26)
-#define FROM_DW3_PING(x)		(((x) >> 26) & 0x1)
-#define DW3_ERROR_BIT			(1 << 28)
-#define DW3_BABBLE_BIT			(1 << 29)
-#define DW3_HALT_BIT			(1 << 30)
-#define DW3_ACTIVE_BIT			(1 << 31)
-#define FROM_DW3_ACTIVE(x)		(((x) >> 31) & 0x01)
-
-#define INT_UNDERRUN			(1 << 2)
-#define INT_BABBLE			(1 << 1)
-#define INT_EXACT			(1 << 0)
-
-#define SETUP_PID	(2)
-#define IN_PID		(1)
-#define OUT_PID		(0)
-
-/* Errata 1 */
-#define RL_COUNTER	(0)
-#define NAK_COUNTER	(0)
-#define ERR_COUNTER	(2)
-
-struct isp1760_qtd {
-	u8 packet_type;
-	void *data_buffer;
-	u32 payload_addr;
-
-	/* the rest is HCD-private */
-	struct list_head qtd_list;
-	struct urb *urb;
-	size_t length;
-	size_t actual_length;
-
-	/* QTD_ENQUEUED:	waiting for transfer (inactive) */
-	/* QTD_PAYLOAD_ALLOC:	chip mem has been allocated for payload */
-	/* QTD_XFER_STARTED:	valid ptd has been written to isp176x - only
-				interrupt handler may touch this qtd! */
-	/* QTD_XFER_COMPLETE:	payload has been transferred successfully */
-	/* QTD_RETIRE:		transfer error/abort qtd */
-#define QTD_ENQUEUED		0
-#define QTD_PAYLOAD_ALLOC	1
-#define QTD_XFER_STARTED	2
-#define QTD_XFER_COMPLETE	3
-#define QTD_RETIRE		4
-	u32 status;
-};
-
-/* Queue head, one for each active endpoint */
-struct isp1760_qh {
-	struct list_head qh_list;
-	struct list_head qtd_list;
-	u32 toggle;
-	u32 ping;
-	int slot;
-	int tt_buffer_dirty;	/* See USB2.0 spec section 11.17.5 */
-};
-
-struct urb_listitem {
-	struct list_head urb_list;
-	struct urb *urb;
-};
-
-/*
- * Access functions for isp176x registers (addresses 0..0x03FF).
- */
-static u32 reg_read32(void __iomem *base, u32 reg)
-{
-	return isp1760_read32(base, reg);
-}
-
-static void reg_write32(void __iomem *base, u32 reg, u32 val)
-{
-	isp1760_write32(base, reg, val);
-}
-
-/*
- * Access functions for isp176x memory (offset >= 0x0400).
- *
- * bank_reads8() reads memory locations prefetched by an earlier write to
- * HC_MEMORY_REG (see isp176x datasheet). Unless you want to do fancy multi-
- * bank optimizations, you should use the more generic mem_reads8() below.
- *
- * For access to ptd memory, use the specialized ptd_read() and ptd_write()
- * below.
- *
- * These functions copy via MMIO data to/from the device. memcpy_{to|from}io()
- * doesn't quite work because some people have to enforce 32-bit access
- */
-static void bank_reads8(void __iomem *src_base, u32 src_offset, u32 bank_addr,
-							__u32 *dst, u32 bytes)
-{
-	__u32 __iomem *src;
-	u32 val;
-	__u8 *src_byteptr;
-	__u8 *dst_byteptr;
-
-	src = src_base + (bank_addr | src_offset);
-
-	if (src_offset < PAYLOAD_OFFSET) {
-		while (bytes >= 4) {
-			*dst = le32_to_cpu(__raw_readl(src));
-			bytes -= 4;
-			src++;
-			dst++;
-		}
-	} else {
-		while (bytes >= 4) {
-			*dst = __raw_readl(src);
-			bytes -= 4;
-			src++;
-			dst++;
-		}
-	}
-
-	if (!bytes)
-		return;
-
-	/* in case we have 3, 2 or 1 by left. The dst buffer may not be fully
-	 * allocated.
-	 */
-	if (src_offset < PAYLOAD_OFFSET)
-		val = le32_to_cpu(__raw_readl(src));
-	else
-		val = __raw_readl(src);
-
-	dst_byteptr = (void *) dst;
-	src_byteptr = (void *) &val;
-	while (bytes > 0) {
-		*dst_byteptr = *src_byteptr;
-		dst_byteptr++;
-		src_byteptr++;
-		bytes--;
-	}
-}
-
-static void mem_reads8(void __iomem *src_base, u32 src_offset, void *dst,
-								u32 bytes)
-{
-	reg_write32(src_base, HC_MEMORY_REG, src_offset + ISP_BANK(0));
-	ndelay(90);
-	bank_reads8(src_base, src_offset, ISP_BANK(0), dst, bytes);
-}
-
-static void mem_writes8(void __iomem *dst_base, u32 dst_offset,
-						__u32 const *src, u32 bytes)
-{
-	__u32 __iomem *dst;
-
-	dst = dst_base + dst_offset;
-
-	if (dst_offset < PAYLOAD_OFFSET) {
-		while (bytes >= 4) {
-			__raw_writel(cpu_to_le32(*src), dst);
-			bytes -= 4;
-			src++;
-			dst++;
-		}
-	} else {
-		while (bytes >= 4) {
-			__raw_writel(*src, dst);
-			bytes -= 4;
-			src++;
-			dst++;
-		}
-	}
-
-	if (!bytes)
-		return;
-	/* in case we have 3, 2 or 1 bytes left. The buffer is allocated and the
-	 * extra bytes should not be read by the HW.
-	 */
-
-	if (dst_offset < PAYLOAD_OFFSET)
-		__raw_writel(cpu_to_le32(*src), dst);
-	else
-		__raw_writel(*src, dst);
-}
-
-/*
- * Read and write ptds. 'ptd_offset' should be one of ISO_PTD_OFFSET,
- * INT_PTD_OFFSET, and ATL_PTD_OFFSET. 'slot' should be less than 32.
- */
-static void ptd_read(void __iomem *base, u32 ptd_offset, u32 slot,
-								struct ptd *ptd)
-{
-	reg_write32(base, HC_MEMORY_REG,
-				ISP_BANK(0) + ptd_offset + slot*sizeof(*ptd));
-	ndelay(90);
-	bank_reads8(base, ptd_offset + slot*sizeof(*ptd), ISP_BANK(0),
-						(void *) ptd, sizeof(*ptd));
-}
-
-static void ptd_write(void __iomem *base, u32 ptd_offset, u32 slot,
-								struct ptd *ptd)
-{
-	mem_writes8(base, ptd_offset + slot*sizeof(*ptd) + sizeof(ptd->dw0),
-						&ptd->dw1, 7*sizeof(ptd->dw1));
-	/* Make sure dw0 gets written last (after other dw's and after payload)
-	   since it contains the enable bit */
-	wmb();
-	mem_writes8(base, ptd_offset + slot*sizeof(*ptd), &ptd->dw0,
-							sizeof(ptd->dw0));
-}
-
-
-/* memory management of the 60kb on the chip from 0x1000 to 0xffff */
-static void init_memory(struct isp1760_hcd *priv)
-{
-	int i, curr;
-	u32 payload_addr;
-
-	payload_addr = PAYLOAD_OFFSET;
-	for (i = 0; i < BLOCK_1_NUM; i++) {
-		priv->memory_pool[i].start = payload_addr;
-		priv->memory_pool[i].size = BLOCK_1_SIZE;
-		priv->memory_pool[i].free = 1;
-		payload_addr += priv->memory_pool[i].size;
-	}
-
-	curr = i;
-	for (i = 0; i < BLOCK_2_NUM; i++) {
-		priv->memory_pool[curr + i].start = payload_addr;
-		priv->memory_pool[curr + i].size = BLOCK_2_SIZE;
-		priv->memory_pool[curr + i].free = 1;
-		payload_addr += priv->memory_pool[curr + i].size;
-	}
-
-	curr = i;
-	for (i = 0; i < BLOCK_3_NUM; i++) {
-		priv->memory_pool[curr + i].start = payload_addr;
-		priv->memory_pool[curr + i].size = BLOCK_3_SIZE;
-		priv->memory_pool[curr + i].free = 1;
-		payload_addr += priv->memory_pool[curr + i].size;
-	}
-
-	WARN_ON(payload_addr - priv->memory_pool[0].start > PAYLOAD_AREA_SIZE);
-}
-
-static void alloc_mem(struct usb_hcd *hcd, struct isp1760_qtd *qtd)
-{
-	struct isp1760_hcd *priv = hcd_to_priv(hcd);
-	int i;
-
-	WARN_ON(qtd->payload_addr);
-
-	if (!qtd->length)
-		return;
-
-	for (i = 0; i < BLOCKS; i++) {
-		if (priv->memory_pool[i].size >= qtd->length &&
-				priv->memory_pool[i].free) {
-			priv->memory_pool[i].free = 0;
-			qtd->payload_addr = priv->memory_pool[i].start;
-			return;
-		}
-	}
-}
-
-static void free_mem(struct usb_hcd *hcd, struct isp1760_qtd *qtd)
-{
-	struct isp1760_hcd *priv = hcd_to_priv(hcd);
-	int i;
-
-	if (!qtd->payload_addr)
-		return;
-
-	for (i = 0; i < BLOCKS; i++) {
-		if (priv->memory_pool[i].start == qtd->payload_addr) {
-			WARN_ON(priv->memory_pool[i].free);
-			priv->memory_pool[i].free = 1;
-			qtd->payload_addr = 0;
-			return;
-		}
-	}
-
-	dev_err(hcd->self.controller, "%s: Invalid pointer: %08x\n",
-						__func__, qtd->payload_addr);
-	WARN_ON(1);
-	qtd->payload_addr = 0;
-}
-
-static int handshake(struct usb_hcd *hcd, u32 reg,
-		      u32 mask, u32 done, int usec)
-{
-	u32 result;
-
-	do {
-		result = reg_read32(hcd->regs, reg);
-		if (result == ~0)
-			return -ENODEV;
-		result &= mask;
-		if (result == done)
-			return 0;
-		udelay(1);
-		usec--;
-	} while (usec > 0);
-	return -ETIMEDOUT;
-}
-
-/* reset a non-running (STS_HALT == 1) controller */
-static int ehci_reset(struct usb_hcd *hcd)
-{
-	int retval;
-	struct isp1760_hcd *priv = hcd_to_priv(hcd);
-
-	u32 command = reg_read32(hcd->regs, HC_USBCMD);
-
-	command |= CMD_RESET;
-	reg_write32(hcd->regs, HC_USBCMD, command);
-	hcd->state = HC_STATE_HALT;
-	priv->next_statechange = jiffies;
-	retval = handshake(hcd, HC_USBCMD,
-			    CMD_RESET, 0, 250 * 1000);
-	return retval;
-}
-
-static struct isp1760_qh *qh_alloc(gfp_t flags)
-{
-	struct isp1760_qh *qh;
-
-	qh = kmem_cache_zalloc(qh_cachep, flags);
-	if (!qh)
-		return NULL;
-
-	INIT_LIST_HEAD(&qh->qh_list);
-	INIT_LIST_HEAD(&qh->qtd_list);
-	qh->slot = -1;
-
-	return qh;
-}
-
-static void qh_free(struct isp1760_qh *qh)
-{
-	WARN_ON(!list_empty(&qh->qtd_list));
-	WARN_ON(qh->slot > -1);
-	kmem_cache_free(qh_cachep, qh);
-}
-
-/* one-time init, only for memory state */
-static int priv_init(struct usb_hcd *hcd)
-{
-	struct isp1760_hcd		*priv = hcd_to_priv(hcd);
-	u32			hcc_params;
-	int i;
-
-	spin_lock_init(&priv->lock);
-
-	for (i = 0; i < QH_END; i++)
-		INIT_LIST_HEAD(&priv->qh_list[i]);
-
-	/*
-	 * hw default: 1K periodic list heads, one per frame.
-	 * periodic_size can shrink by USBCMD update if hcc_params allows.
-	 */
-	priv->periodic_size = DEFAULT_I_TDPS;
-
-	/* controllers may cache some of the periodic schedule ... */
-	hcc_params = reg_read32(hcd->regs, HC_HCCPARAMS);
-	/* full frame cache */
-	if (HCC_ISOC_CACHE(hcc_params))
-		priv->i_thresh = 8;
-	else /* N microframes cached */
-		priv->i_thresh = 2 + HCC_ISOC_THRES(hcc_params);
-
-	return 0;
-}
-
-static int isp1760_hc_setup(struct usb_hcd *hcd)
-{
-	struct isp1760_hcd *priv = hcd_to_priv(hcd);
-	int result;
-	u32 scratch, hwmode;
-
-	reg_write32(hcd->regs, HC_SCRATCH_REG, 0xdeadbabe);
-	/* Change bus pattern */
-	scratch = reg_read32(hcd->regs, HC_CHIP_ID_REG);
-	scratch = reg_read32(hcd->regs, HC_SCRATCH_REG);
-	if (scratch != 0xdeadbabe) {
-		dev_err(hcd->self.controller, "Scratch test failed.\n");
-		return -ENODEV;
-	}
-
-	/*
-	 * The RESET_HC bit in the SW_RESET register is supposed to reset the
-	 * host controller without touching the CPU interface registers, but at
-	 * least on the ISP1761 it seems to behave as the RESET_ALL bit and
-	 * reset the whole device. We thus can't use it here, so let's reset
-	 * the host controller through the EHCI USB Command register. The device
-	 * has been reset in core code anyway, so this shouldn't matter.
-	 */
-	reg_write32(hcd->regs, HC_BUFFER_STATUS_REG, 0);
-	reg_write32(hcd->regs, HC_ATL_PTD_SKIPMAP_REG, NO_TRANSFER_ACTIVE);
-	reg_write32(hcd->regs, HC_INT_PTD_SKIPMAP_REG, NO_TRANSFER_ACTIVE);
-	reg_write32(hcd->regs, HC_ISO_PTD_SKIPMAP_REG, NO_TRANSFER_ACTIVE);
-
-	result = ehci_reset(hcd);
-	if (result)
-		return result;
-
-	/* Step 11 passed */
-
-	/* ATL reset */
-	hwmode = reg_read32(hcd->regs, HC_HW_MODE_CTRL) & ~ALL_ATX_RESET;
-	reg_write32(hcd->regs, HC_HW_MODE_CTRL, hwmode | ALL_ATX_RESET);
-	mdelay(10);
-	reg_write32(hcd->regs, HC_HW_MODE_CTRL, hwmode);
-
-	reg_write32(hcd->regs, HC_INTERRUPT_ENABLE, INTERRUPT_ENABLE_MASK);
-
-	priv->hcs_params = reg_read32(hcd->regs, HC_HCSPARAMS);
-
-	return priv_init(hcd);
-}
-
-static u32 base_to_chip(u32 base)
-{
-	return ((base - 0x400) >> 3);
-}
-
-static int last_qtd_of_urb(struct isp1760_qtd *qtd, struct isp1760_qh *qh)
-{
-	struct urb *urb;
-
-	if (list_is_last(&qtd->qtd_list, &qh->qtd_list))
-		return 1;
-
-	urb = qtd->urb;
-	qtd = list_entry(qtd->qtd_list.next, typeof(*qtd), qtd_list);
-	return (qtd->urb != urb);
-}
-
-/* magic numbers that can affect system performance */
-#define	EHCI_TUNE_CERR		3	/* 0-3 qtd retries; 0 == don't stop */
-#define	EHCI_TUNE_RL_HS		4	/* nak throttle; see 4.9 */
-#define	EHCI_TUNE_RL_TT		0
-#define	EHCI_TUNE_MULT_HS	1	/* 1-3 transactions/uframe; 4.10.3 */
-#define	EHCI_TUNE_MULT_TT	1
-#define	EHCI_TUNE_FLS		2	/* (small) 256 frame schedule */
-
-static void create_ptd_atl(struct isp1760_qh *qh,
-			struct isp1760_qtd *qtd, struct ptd *ptd)
-{
-	u32 maxpacket;
-	u32 multi;
-	u32 rl = RL_COUNTER;
-	u32 nak = NAK_COUNTER;
-
-	memset(ptd, 0, sizeof(*ptd));
-
-	/* according to 3.6.2, max packet len can not be > 0x400 */
-	maxpacket = usb_maxpacket(qtd->urb->dev, qtd->urb->pipe,
-						usb_pipeout(qtd->urb->pipe));
-	multi =  1 + ((maxpacket >> 11) & 0x3);
-	maxpacket &= 0x7ff;
-
-	/* DW0 */
-	ptd->dw0 = DW0_VALID_BIT;
-	ptd->dw0 |= TO_DW0_LENGTH(qtd->length);
-	ptd->dw0 |= TO_DW0_MAXPACKET(maxpacket);
-	ptd->dw0 |= TO_DW0_ENDPOINT(usb_pipeendpoint(qtd->urb->pipe));
-
-	/* DW1 */
-	ptd->dw1 = usb_pipeendpoint(qtd->urb->pipe) >> 1;
-	ptd->dw1 |= TO_DW1_DEVICE_ADDR(usb_pipedevice(qtd->urb->pipe));
-	ptd->dw1 |= TO_DW1_PID_TOKEN(qtd->packet_type);
-
-	if (usb_pipebulk(qtd->urb->pipe))
-		ptd->dw1 |= DW1_TRANS_BULK;
-	else if  (usb_pipeint(qtd->urb->pipe))
-		ptd->dw1 |= DW1_TRANS_INT;
-
-	if (qtd->urb->dev->speed != USB_SPEED_HIGH) {
-		/* split transaction */
-
-		ptd->dw1 |= DW1_TRANS_SPLIT;
-		if (qtd->urb->dev->speed == USB_SPEED_LOW)
-			ptd->dw1 |= DW1_SE_USB_LOSPEED;
-
-		ptd->dw1 |= TO_DW1_PORT_NUM(qtd->urb->dev->ttport);
-		ptd->dw1 |= TO_DW1_HUB_NUM(qtd->urb->dev->tt->hub->devnum);
-
-		/* SE bit for Split INT transfers */
-		if (usb_pipeint(qtd->urb->pipe) &&
-				(qtd->urb->dev->speed == USB_SPEED_LOW))
-			ptd->dw1 |= 2 << 16;
-
-		rl = 0;
-		nak = 0;
-	} else {
-		ptd->dw0 |= TO_DW0_MULTI(multi);
-		if (usb_pipecontrol(qtd->urb->pipe) ||
-						usb_pipebulk(qtd->urb->pipe))
-			ptd->dw3 |= TO_DW3_PING(qh->ping);
-	}
-	/* DW2 */
-	ptd->dw2 = 0;
-	ptd->dw2 |= TO_DW2_DATA_START_ADDR(base_to_chip(qtd->payload_addr));
-	ptd->dw2 |= TO_DW2_RL(rl);
-
-	/* DW3 */
-	ptd->dw3 |= TO_DW3_NAKCOUNT(nak);
-	ptd->dw3 |= TO_DW3_DATA_TOGGLE(qh->toggle);
-	if (usb_pipecontrol(qtd->urb->pipe)) {
-		if (qtd->data_buffer == qtd->urb->setup_packet)
-			ptd->dw3 &= ~TO_DW3_DATA_TOGGLE(1);
-		else if (last_qtd_of_urb(qtd, qh))
-			ptd->dw3 |= TO_DW3_DATA_TOGGLE(1);
-	}
-
-	ptd->dw3 |= DW3_ACTIVE_BIT;
-	/* Cerr */
-	ptd->dw3 |= TO_DW3_CERR(ERR_COUNTER);
-}
-
-static void transform_add_int(struct isp1760_qh *qh,
-			struct isp1760_qtd *qtd, struct ptd *ptd)
-{
-	u32 usof;
-	u32 period;
-
-	/*
-	 * Most of this is guessing. ISP1761 datasheet is quite unclear, and
-	 * the algorithm from the original Philips driver code, which was
-	 * pretty much used in this driver before as well, is quite horrendous
-	 * and, i believe, incorrect. The code below follows the datasheet and
-	 * USB2.0 spec as far as I can tell, and plug/unplug seems to be much
-	 * more reliable this way (fingers crossed...).
-	 */
-
-	if (qtd->urb->dev->speed == USB_SPEED_HIGH) {
-		/* urb->interval is in units of microframes (1/8 ms) */
-		period = qtd->urb->interval >> 3;
-
-		if (qtd->urb->interval > 4)
-			usof = 0x01; /* One bit set =>
-						interval 1 ms * uFrame-match */
-		else if (qtd->urb->interval > 2)
-			usof = 0x22; /* Two bits set => interval 1/2 ms */
-		else if (qtd->urb->interval > 1)
-			usof = 0x55; /* Four bits set => interval 1/4 ms */
-		else
-			usof = 0xff; /* All bits set => interval 1/8 ms */
-	} else {
-		/* urb->interval is in units of frames (1 ms) */
-		period = qtd->urb->interval;
-		usof = 0x0f;		/* Execute Start Split on any of the
-					   four first uFrames */
-
-		/*
-		 * First 8 bits in dw5 is uSCS and "specifies which uSOF the
-		 * complete split needs to be sent. Valid only for IN." Also,
-		 * "All bits can be set to one for every transfer." (p 82,
-		 * ISP1761 data sheet.) 0x1c is from Philips driver. Where did
-		 * that number come from? 0xff seems to work fine...
-		 */
-		/* ptd->dw5 = 0x1c; */
-		ptd->dw5 = 0xff; /* Execute Complete Split on any uFrame */
-	}
-
-	period = period >> 1;/* Ensure equal or shorter period than requested */
-	period &= 0xf8; /* Mask off too large values and lowest unused 3 bits */
-
-	ptd->dw2 |= period;
-	ptd->dw4 = usof;
-}
-
-static void create_ptd_int(struct isp1760_qh *qh,
-			struct isp1760_qtd *qtd, struct ptd *ptd)
-{
-	create_ptd_atl(qh, qtd, ptd);
-	transform_add_int(qh, qtd, ptd);
-}
-
-static void isp1760_urb_done(struct usb_hcd *hcd, struct urb *urb)
-__releases(priv->lock)
-__acquires(priv->lock)
-{
-	struct isp1760_hcd *priv = hcd_to_priv(hcd);
-
-	if (!urb->unlinked) {
-		if (urb->status == -EINPROGRESS)
-			urb->status = 0;
-	}
-
-	if (usb_pipein(urb->pipe) && usb_pipetype(urb->pipe) != PIPE_CONTROL) {
-		void *ptr;
-		for (ptr = urb->transfer_buffer;
-		     ptr < urb->transfer_buffer + urb->transfer_buffer_length;
-		     ptr += PAGE_SIZE)
-			flush_dcache_page(virt_to_page(ptr));
-	}
-
-	/* complete() can reenter this HCD */
-	usb_hcd_unlink_urb_from_ep(hcd, urb);
-	spin_unlock(&priv->lock);
-	usb_hcd_giveback_urb(hcd, urb, urb->status);
-	spin_lock(&priv->lock);
-}
-
-static struct isp1760_qtd *qtd_alloc(gfp_t flags, struct urb *urb,
-								u8 packet_type)
-{
-	struct isp1760_qtd *qtd;
-
-	qtd = kmem_cache_zalloc(qtd_cachep, flags);
-	if (!qtd)
-		return NULL;
-
-	INIT_LIST_HEAD(&qtd->qtd_list);
-	qtd->urb = urb;
-	qtd->packet_type = packet_type;
-	qtd->status = QTD_ENQUEUED;
-	qtd->actual_length = 0;
-
-	return qtd;
-}
-
-static void qtd_free(struct isp1760_qtd *qtd)
-{
-	WARN_ON(qtd->payload_addr);
-	kmem_cache_free(qtd_cachep, qtd);
-}
-
-static void start_bus_transfer(struct usb_hcd *hcd, u32 ptd_offset, int slot,
-				struct isp1760_slotinfo *slots,
-				struct isp1760_qtd *qtd, struct isp1760_qh *qh,
-				struct ptd *ptd)
-{
-	struct isp1760_hcd *priv = hcd_to_priv(hcd);
-	int skip_map;
-
-	WARN_ON((slot < 0) || (slot > 31));
-	WARN_ON(qtd->length && !qtd->payload_addr);
-	WARN_ON(slots[slot].qtd);
-	WARN_ON(slots[slot].qh);
-	WARN_ON(qtd->status != QTD_PAYLOAD_ALLOC);
-
-	/* Make sure done map has not triggered from some unlinked transfer */
-	if (ptd_offset == ATL_PTD_OFFSET) {
-		priv->atl_done_map |= reg_read32(hcd->regs,
-						HC_ATL_PTD_DONEMAP_REG);
-		priv->atl_done_map &= ~(1 << slot);
-	} else {
-		priv->int_done_map |= reg_read32(hcd->regs,
-						HC_INT_PTD_DONEMAP_REG);
-		priv->int_done_map &= ~(1 << slot);
-	}
-
-	qh->slot = slot;
-	qtd->status = QTD_XFER_STARTED;
-	slots[slot].timestamp = jiffies;
-	slots[slot].qtd = qtd;
-	slots[slot].qh = qh;
-	ptd_write(hcd->regs, ptd_offset, slot, ptd);
-
-	if (ptd_offset == ATL_PTD_OFFSET) {
-		skip_map = reg_read32(hcd->regs, HC_ATL_PTD_SKIPMAP_REG);
-		skip_map &= ~(1 << qh->slot);
-		reg_write32(hcd->regs, HC_ATL_PTD_SKIPMAP_REG, skip_map);
-	} else {
-		skip_map = reg_read32(hcd->regs, HC_INT_PTD_SKIPMAP_REG);
-		skip_map &= ~(1 << qh->slot);
-		reg_write32(hcd->regs, HC_INT_PTD_SKIPMAP_REG, skip_map);
-	}
-}
-
-static int is_short_bulk(struct isp1760_qtd *qtd)
-{
-	return (usb_pipebulk(qtd->urb->pipe) &&
-					(qtd->actual_length < qtd->length));
-}
-
-static void collect_qtds(struct usb_hcd *hcd, struct isp1760_qh *qh,
-						struct list_head *urb_list)
-{
-	int last_qtd;
-	struct isp1760_qtd *qtd, *qtd_next;
-	struct urb_listitem *urb_listitem;
-
-	list_for_each_entry_safe(qtd, qtd_next, &qh->qtd_list, qtd_list) {
-		if (qtd->status < QTD_XFER_COMPLETE)
-			break;
-
-		last_qtd = last_qtd_of_urb(qtd, qh);
-
-		if ((!last_qtd) && (qtd->status == QTD_RETIRE))
-			qtd_next->status = QTD_RETIRE;
-
-		if (qtd->status == QTD_XFER_COMPLETE) {
-			if (qtd->actual_length) {
-				switch (qtd->packet_type) {
-				case IN_PID:
-					mem_reads8(hcd->regs, qtd->payload_addr,
-							qtd->data_buffer,
-							qtd->actual_length);
-					/* Fall through (?) */
-				case OUT_PID:
-					qtd->urb->actual_length +=
-							qtd->actual_length;
-					/* Fall through ... */
-				case SETUP_PID:
-					break;
-				}
-			}
-
-			if (is_short_bulk(qtd)) {
-				if (qtd->urb->transfer_flags & URB_SHORT_NOT_OK)
-					qtd->urb->status = -EREMOTEIO;
-				if (!last_qtd)
-					qtd_next->status = QTD_RETIRE;
-			}
-		}
-
-		if (qtd->payload_addr)
-			free_mem(hcd, qtd);
-
-		if (last_qtd) {
-			if ((qtd->status == QTD_RETIRE) &&
-					(qtd->urb->status == -EINPROGRESS))
-				qtd->urb->status = -EPIPE;
-			/* Defer calling of urb_done() since it releases lock */
-			urb_listitem = kmem_cache_zalloc(urb_listitem_cachep,
-								GFP_ATOMIC);
-			if (unlikely(!urb_listitem))
-				break; /* Try again on next call */
-			urb_listitem->urb = qtd->urb;
-			list_add_tail(&urb_listitem->urb_list, urb_list);
-		}
-
-		list_del(&qtd->qtd_list);
-		qtd_free(qtd);
-	}
-}
-
-#define ENQUEUE_DEPTH	2
-static void enqueue_qtds(struct usb_hcd *hcd, struct isp1760_qh *qh)
-{
-	struct isp1760_hcd *priv = hcd_to_priv(hcd);
-	int ptd_offset;
-	struct isp1760_slotinfo *slots;
-	int curr_slot, free_slot;
-	int n;
-	struct ptd ptd;
-	struct isp1760_qtd *qtd;
-
-	if (unlikely(list_empty(&qh->qtd_list))) {
-		WARN_ON(1);
-		return;
-	}
-
-	/* Make sure this endpoint's TT buffer is clean before queueing ptds */
-	if (qh->tt_buffer_dirty)
-		return;
-
-	if (usb_pipeint(list_entry(qh->qtd_list.next, struct isp1760_qtd,
-							qtd_list)->urb->pipe)) {
-		ptd_offset = INT_PTD_OFFSET;
-		slots = priv->int_slots;
-	} else {
-		ptd_offset = ATL_PTD_OFFSET;
-		slots = priv->atl_slots;
-	}
-
-	free_slot = -1;
-	for (curr_slot = 0; curr_slot < 32; curr_slot++) {
-		if ((free_slot == -1) && (slots[curr_slot].qtd == NULL))
-			free_slot = curr_slot;
-		if (slots[curr_slot].qh == qh)
-			break;
-	}
-
-	n = 0;
-	list_for_each_entry(qtd, &qh->qtd_list, qtd_list) {
-		if (qtd->status == QTD_ENQUEUED) {
-			WARN_ON(qtd->payload_addr);
-			alloc_mem(hcd, qtd);
-			if ((qtd->length) && (!qtd->payload_addr))
-				break;
-
-			if ((qtd->length) &&
-			    ((qtd->packet_type == SETUP_PID) ||
-			     (qtd->packet_type == OUT_PID))) {
-				mem_writes8(hcd->regs, qtd->payload_addr,
-						qtd->data_buffer, qtd->length);
-			}
-
-			qtd->status = QTD_PAYLOAD_ALLOC;
-		}
-
-		if (qtd->status == QTD_PAYLOAD_ALLOC) {
-/*
-			if ((curr_slot > 31) && (free_slot == -1))
-				dev_dbg(hcd->self.controller, "%s: No slot "
-					"available for transfer\n", __func__);
-*/
-			/* Start xfer for this endpoint if not already done */
-			if ((curr_slot > 31) && (free_slot > -1)) {
-				if (usb_pipeint(qtd->urb->pipe))
-					create_ptd_int(qh, qtd, &ptd);
-				else
-					create_ptd_atl(qh, qtd, &ptd);
-
-				start_bus_transfer(hcd, ptd_offset, free_slot,
-							slots, qtd, qh, &ptd);
-				curr_slot = free_slot;
-			}
-
-			n++;
-			if (n >= ENQUEUE_DEPTH)
-				break;
-		}
-	}
-}
-
-static void schedule_ptds(struct usb_hcd *hcd)
-{
-	struct isp1760_hcd *priv;
-	struct isp1760_qh *qh, *qh_next;
-	struct list_head *ep_queue;
-	LIST_HEAD(urb_list);
-	struct urb_listitem *urb_listitem, *urb_listitem_next;
-	int i;
-
-	if (!hcd) {
-		WARN_ON(1);
-		return;
-	}
-
-	priv = hcd_to_priv(hcd);
-
-	/*
-	 * check finished/retired xfers, transfer payloads, call urb_done()
-	 */
-	for (i = 0; i < QH_END; i++) {
-		ep_queue = &priv->qh_list[i];
-		list_for_each_entry_safe(qh, qh_next, ep_queue, qh_list) {
-			collect_qtds(hcd, qh, &urb_list);
-			if (list_empty(&qh->qtd_list))
-				list_del(&qh->qh_list);
-		}
-	}
-
-	list_for_each_entry_safe(urb_listitem, urb_listitem_next, &urb_list,
-								urb_list) {
-		isp1760_urb_done(hcd, urb_listitem->urb);
-		kmem_cache_free(urb_listitem_cachep, urb_listitem);
-	}
-
-	/*
-	 * Schedule packets for transfer.
-	 *
-	 * According to USB2.0 specification:
-	 *
-	 * 1st prio: interrupt xfers, up to 80 % of bandwidth
-	 * 2nd prio: control xfers
-	 * 3rd prio: bulk xfers
-	 *
-	 * ... but let's use a simpler scheme here (mostly because ISP1761 doc
-	 * is very unclear on how to prioritize traffic):
-	 *
-	 * 1) Enqueue any queued control transfers, as long as payload chip mem
-	 *    and PTD ATL slots are available.
-	 * 2) Enqueue any queued INT transfers, as long as payload chip mem
-	 *    and PTD INT slots are available.
-	 * 3) Enqueue any queued bulk transfers, as long as payload chip mem
-	 *    and PTD ATL slots are available.
-	 *
-	 * Use double buffering (ENQUEUE_DEPTH==2) as a compromise between
-	 * conservation of chip mem and performance.
-	 *
-	 * I'm sure this scheme could be improved upon!
-	 */
-	for (i = 0; i < QH_END; i++) {
-		ep_queue = &priv->qh_list[i];
-		list_for_each_entry_safe(qh, qh_next, ep_queue, qh_list)
-			enqueue_qtds(hcd, qh);
-	}
-}
-
-#define PTD_STATE_QTD_DONE	1
-#define PTD_STATE_QTD_RELOAD	2
-#define PTD_STATE_URB_RETIRE	3
-
-static int check_int_transfer(struct usb_hcd *hcd, struct ptd *ptd,
-								struct urb *urb)
-{
-	__dw dw4;
-	int i;
-
-	dw4 = ptd->dw4;
-	dw4 >>= 8;
-
-	/* FIXME: ISP1761 datasheet does not say what to do with these. Do we
-	   need to handle these errors? Is it done in hardware? */
-
-	if (ptd->dw3 & DW3_HALT_BIT) {
-
-		urb->status = -EPROTO; /* Default unknown error */
-
-		for (i = 0; i < 8; i++) {
-			switch (dw4 & 0x7) {
-			case INT_UNDERRUN:
-				dev_dbg(hcd->self.controller, "%s: underrun "
-						"during uFrame %d\n",
-						__func__, i);
-				urb->status = -ECOMM; /* Could not write data */
-				break;
-			case INT_EXACT:
-				dev_dbg(hcd->self.controller, "%s: transaction "
-						"error during uFrame %d\n",
-						__func__, i);
-				urb->status = -EPROTO; /* timeout, bad CRC, PID
-							  error etc. */
-				break;
-			case INT_BABBLE:
-				dev_dbg(hcd->self.controller, "%s: babble "
-						"error during uFrame %d\n",
-						__func__, i);
-				urb->status = -EOVERFLOW;
-				break;
-			}
-			dw4 >>= 3;
-		}
-
-		return PTD_STATE_URB_RETIRE;
-	}
-
-	return PTD_STATE_QTD_DONE;
-}
-
-static int check_atl_transfer(struct usb_hcd *hcd, struct ptd *ptd,
-								struct urb *urb)
-{
-	WARN_ON(!ptd);
-	if (ptd->dw3 & DW3_HALT_BIT) {
-		if (ptd->dw3 & DW3_BABBLE_BIT)
-			urb->status = -EOVERFLOW;
-		else if (FROM_DW3_CERR(ptd->dw3))
-			urb->status = -EPIPE;  /* Stall */
-		else if (ptd->dw3 & DW3_ERROR_BIT)
-			urb->status = -EPROTO; /* XactErr */
-		else
-			urb->status = -EPROTO; /* Unknown */
-/*
-		dev_dbg(hcd->self.controller, "%s: ptd error:\n"
-			"        dw0: %08x dw1: %08x dw2: %08x dw3: %08x\n"
-			"        dw4: %08x dw5: %08x dw6: %08x dw7: %08x\n",
-			__func__,
-			ptd->dw0, ptd->dw1, ptd->dw2, ptd->dw3,
-			ptd->dw4, ptd->dw5, ptd->dw6, ptd->dw7);
-*/
-		return PTD_STATE_URB_RETIRE;
-	}
-
-	if ((ptd->dw3 & DW3_ERROR_BIT) && (ptd->dw3 & DW3_ACTIVE_BIT)) {
-		/* Transfer Error, *but* active and no HALT -> reload */
-		dev_dbg(hcd->self.controller, "PID error; reloading ptd\n");
-		return PTD_STATE_QTD_RELOAD;
-	}
-
-	if (!FROM_DW3_NAKCOUNT(ptd->dw3) && (ptd->dw3 & DW3_ACTIVE_BIT)) {
-		/*
-		 * NAKs are handled in HW by the chip. Usually if the
-		 * device is not able to send data fast enough.
-		 * This happens mostly on slower hardware.
-		 */
-		return PTD_STATE_QTD_RELOAD;
-	}
-
-	return PTD_STATE_QTD_DONE;
-}
-
-static void handle_done_ptds(struct usb_hcd *hcd)
-{
-	struct isp1760_hcd *priv = hcd_to_priv(hcd);
-	struct ptd ptd;
-	struct isp1760_qh *qh;
-	int slot;
-	int state;
-	struct isp1760_slotinfo *slots;
-	u32 ptd_offset;
-	struct isp1760_qtd *qtd;
-	int modified;
-	int skip_map;
-
-	skip_map = reg_read32(hcd->regs, HC_INT_PTD_SKIPMAP_REG);
-	priv->int_done_map &= ~skip_map;
-	skip_map = reg_read32(hcd->regs, HC_ATL_PTD_SKIPMAP_REG);
-	priv->atl_done_map &= ~skip_map;
-
-	modified = priv->int_done_map || priv->atl_done_map;
-
-	while (priv->int_done_map || priv->atl_done_map) {
-		if (priv->int_done_map) {
-			/* INT ptd */
-			slot = __ffs(priv->int_done_map);
-			priv->int_done_map &= ~(1 << slot);
-			slots = priv->int_slots;
-			/* This should not trigger, and could be removed if
-			   noone have any problems with it triggering: */
-			if (!slots[slot].qh) {
-				WARN_ON(1);
-				continue;
-			}
-			ptd_offset = INT_PTD_OFFSET;
-			ptd_read(hcd->regs, INT_PTD_OFFSET, slot, &ptd);
-			state = check_int_transfer(hcd, &ptd,
-							slots[slot].qtd->urb);
-		} else {
-			/* ATL ptd */
-			slot = __ffs(priv->atl_done_map);
-			priv->atl_done_map &= ~(1 << slot);
-			slots = priv->atl_slots;
-			/* This should not trigger, and could be removed if
-			   noone have any problems with it triggering: */
-			if (!slots[slot].qh) {
-				WARN_ON(1);
-				continue;
-			}
-			ptd_offset = ATL_PTD_OFFSET;
-			ptd_read(hcd->regs, ATL_PTD_OFFSET, slot, &ptd);
-			state = check_atl_transfer(hcd, &ptd,
-							slots[slot].qtd->urb);
-		}
-
-		qtd = slots[slot].qtd;
-		slots[slot].qtd = NULL;
-		qh = slots[slot].qh;
-		slots[slot].qh = NULL;
-		qh->slot = -1;
-
-		WARN_ON(qtd->status != QTD_XFER_STARTED);
-
-		switch (state) {
-		case PTD_STATE_QTD_DONE:
-			if ((usb_pipeint(qtd->urb->pipe)) &&
-				       (qtd->urb->dev->speed != USB_SPEED_HIGH))
-				qtd->actual_length =
-				       FROM_DW3_SCS_NRBYTESTRANSFERRED(ptd.dw3);
-			else
-				qtd->actual_length =
-					FROM_DW3_NRBYTESTRANSFERRED(ptd.dw3);
-
-			qtd->status = QTD_XFER_COMPLETE;
-			if (list_is_last(&qtd->qtd_list, &qh->qtd_list) ||
-							is_short_bulk(qtd))
-				qtd = NULL;
-			else
-				qtd = list_entry(qtd->qtd_list.next,
-							typeof(*qtd), qtd_list);
-
-			qh->toggle = FROM_DW3_DATA_TOGGLE(ptd.dw3);
-			qh->ping = FROM_DW3_PING(ptd.dw3);
-			break;
-
-		case PTD_STATE_QTD_RELOAD: /* QTD_RETRY, for atls only */
-			qtd->status = QTD_PAYLOAD_ALLOC;
-			ptd.dw0 |= DW0_VALID_BIT;
-			/* RL counter = ERR counter */
-			ptd.dw3 &= ~TO_DW3_NAKCOUNT(0xf);
-			ptd.dw3 |= TO_DW3_NAKCOUNT(FROM_DW2_RL(ptd.dw2));
-			ptd.dw3 &= ~TO_DW3_CERR(3);
-			ptd.dw3 |= TO_DW3_CERR(ERR_COUNTER);
-			qh->toggle = FROM_DW3_DATA_TOGGLE(ptd.dw3);
-			qh->ping = FROM_DW3_PING(ptd.dw3);
-			break;
-
-		case PTD_STATE_URB_RETIRE:
-			qtd->status = QTD_RETIRE;
-			if ((qtd->urb->dev->speed != USB_SPEED_HIGH) &&
-					(qtd->urb->status != -EPIPE) &&
-					(qtd->urb->status != -EREMOTEIO)) {
-				qh->tt_buffer_dirty = 1;
-				if (usb_hub_clear_tt_buffer(qtd->urb))
-					/* Clear failed; let's hope things work
-					   anyway */
-					qh->tt_buffer_dirty = 0;
-			}
-			qtd = NULL;
-			qh->toggle = 0;
-			qh->ping = 0;
-			break;
-
-		default:
-			WARN_ON(1);
-			continue;
-		}
-
-		if (qtd && (qtd->status == QTD_PAYLOAD_ALLOC)) {
-			if (slots == priv->int_slots) {
-				if (state == PTD_STATE_QTD_RELOAD)
-					dev_err(hcd->self.controller,
-						"%s: PTD_STATE_QTD_RELOAD on "
-						"interrupt packet\n", __func__);
-				if (state != PTD_STATE_QTD_RELOAD)
-					create_ptd_int(qh, qtd, &ptd);
-			} else {
-				if (state != PTD_STATE_QTD_RELOAD)
-					create_ptd_atl(qh, qtd, &ptd);
-			}
-
-			start_bus_transfer(hcd, ptd_offset, slot, slots, qtd,
-				qh, &ptd);
-		}
-	}
-
-	if (modified)
-		schedule_ptds(hcd);
-}
-
-static irqreturn_t isp1760_irq(struct usb_hcd *hcd)
-{
-	struct isp1760_hcd *priv = hcd_to_priv(hcd);
-	u32 imask;
-	irqreturn_t irqret = IRQ_NONE;
-
-	spin_lock(&priv->lock);
-
-	if (!(hcd->state & HC_STATE_RUNNING))
-		goto leave;
-
-	imask = reg_read32(hcd->regs, HC_INTERRUPT_REG);
-	if (unlikely(!imask))
-		goto leave;
-	reg_write32(hcd->regs, HC_INTERRUPT_REG, imask); /* Clear */
-
-	priv->int_done_map |= reg_read32(hcd->regs, HC_INT_PTD_DONEMAP_REG);
-	priv->atl_done_map |= reg_read32(hcd->regs, HC_ATL_PTD_DONEMAP_REG);
-
-	handle_done_ptds(hcd);
-
-	irqret = IRQ_HANDLED;
-leave:
-	spin_unlock(&priv->lock);
-
-	return irqret;
-}
-
-/*
- * Workaround for problem described in chip errata 2:
- *
- * Sometimes interrupts are not generated when ATL (not INT?) completion occurs.
- * One solution suggested in the errata is to use SOF interrupts _instead_of_
- * ATL done interrupts (the "instead of" might be important since it seems
- * enabling ATL interrupts also causes the chip to sometimes - rarely - "forget"
- * to set the PTD's done bit in addition to not generating an interrupt!).
- *
- * So if we use SOF + ATL interrupts, we sometimes get stale PTDs since their
- * done bit is not being set. This is bad - it blocks the endpoint until reboot.
- *
- * If we use SOF interrupts only, we get latency between ptd completion and the
- * actual handling. This is very noticeable in testusb runs which takes several
- * minutes longer without ATL interrupts.
- *
- * A better solution is to run the code below every SLOT_CHECK_PERIOD ms. If it
- * finds active ATL slots which are older than SLOT_TIMEOUT ms, it checks the
- * slot's ACTIVE and VALID bits. If these are not set, the ptd is considered
- * completed and its done map bit is set.
- *
- * The values of SLOT_TIMEOUT and SLOT_CHECK_PERIOD have been arbitrarily chosen
- * not to cause too much lag when this HW bug occurs, while still hopefully
- * ensuring that the check does not falsely trigger.
- */
-#define SLOT_TIMEOUT 300
-#define SLOT_CHECK_PERIOD 200
-static struct timer_list errata2_timer;
-
-static void errata2_function(unsigned long data)
-{
-	struct usb_hcd *hcd = (struct usb_hcd *) data;
-	struct isp1760_hcd *priv = hcd_to_priv(hcd);
-	int slot;
-	struct ptd ptd;
-	unsigned long spinflags;
-
-	spin_lock_irqsave(&priv->lock, spinflags);
-
-	for (slot = 0; slot < 32; slot++)
-		if (priv->atl_slots[slot].qh && time_after(jiffies,
-					priv->atl_slots[slot].timestamp +
-					SLOT_TIMEOUT * HZ / 1000)) {
-			ptd_read(hcd->regs, ATL_PTD_OFFSET, slot, &ptd);
-			if (!FROM_DW0_VALID(ptd.dw0) &&
-					!FROM_DW3_ACTIVE(ptd.dw3))
-				priv->atl_done_map |= 1 << slot;
-		}
-
-	if (priv->atl_done_map)
-		handle_done_ptds(hcd);
-
-	spin_unlock_irqrestore(&priv->lock, spinflags);
-
-	errata2_timer.expires = jiffies + SLOT_CHECK_PERIOD * HZ / 1000;
-	add_timer(&errata2_timer);
-}
-
-static int isp1760_run(struct usb_hcd *hcd)
-{
-	int retval;
-	u32 temp;
-	u32 command;
-	u32 chipid;
-
-	hcd->uses_new_polling = 1;
-
-	hcd->state = HC_STATE_RUNNING;
-
-	/* Set PTD interrupt AND & OR maps */
-	reg_write32(hcd->regs, HC_ATL_IRQ_MASK_AND_REG, 0);
-	reg_write32(hcd->regs, HC_ATL_IRQ_MASK_OR_REG, 0xffffffff);
-	reg_write32(hcd->regs, HC_INT_IRQ_MASK_AND_REG, 0);
-	reg_write32(hcd->regs, HC_INT_IRQ_MASK_OR_REG, 0xffffffff);
-	reg_write32(hcd->regs, HC_ISO_IRQ_MASK_AND_REG, 0);
-	reg_write32(hcd->regs, HC_ISO_IRQ_MASK_OR_REG, 0xffffffff);
-	/* step 23 passed */
-
-	temp = reg_read32(hcd->regs, HC_HW_MODE_CTRL);
-	reg_write32(hcd->regs, HC_HW_MODE_CTRL, temp | HW_GLOBAL_INTR_EN);
-
-	command = reg_read32(hcd->regs, HC_USBCMD);
-	command &= ~(CMD_LRESET|CMD_RESET);
-	command |= CMD_RUN;
-	reg_write32(hcd->regs, HC_USBCMD, command);
-
-	retval = handshake(hcd, HC_USBCMD, CMD_RUN, CMD_RUN, 250 * 1000);
-	if (retval)
-		return retval;
-
-	/*
-	 * XXX
-	 * Spec says to write FLAG_CF as last config action, priv code grabs
-	 * the semaphore while doing so.
-	 */
-	down_write(&ehci_cf_port_reset_rwsem);
-	reg_write32(hcd->regs, HC_CONFIGFLAG, FLAG_CF);
-
-	retval = handshake(hcd, HC_CONFIGFLAG, FLAG_CF, FLAG_CF, 250 * 1000);
-	up_write(&ehci_cf_port_reset_rwsem);
-	if (retval)
-		return retval;
-
-	init_timer(&errata2_timer);
-	errata2_timer.function = errata2_function;
-	errata2_timer.data = (unsigned long) hcd;
-	errata2_timer.expires = jiffies + SLOT_CHECK_PERIOD * HZ / 1000;
-	add_timer(&errata2_timer);
-
-	chipid = reg_read32(hcd->regs, HC_CHIP_ID_REG);
-	dev_info(hcd->self.controller, "USB ISP %04x HW rev. %d started\n",
-					chipid & 0xffff, chipid >> 16);
-
-	/* PTD Register Init Part 2, Step 28 */
-
-	/* Setup registers controlling PTD checking */
-	reg_write32(hcd->regs, HC_ATL_PTD_LASTPTD_REG, 0x80000000);
-	reg_write32(hcd->regs, HC_INT_PTD_LASTPTD_REG, 0x80000000);
-	reg_write32(hcd->regs, HC_ISO_PTD_LASTPTD_REG, 0x00000001);
-	reg_write32(hcd->regs, HC_ATL_PTD_SKIPMAP_REG, 0xffffffff);
-	reg_write32(hcd->regs, HC_INT_PTD_SKIPMAP_REG, 0xffffffff);
-	reg_write32(hcd->regs, HC_ISO_PTD_SKIPMAP_REG, 0xffffffff);
-	reg_write32(hcd->regs, HC_BUFFER_STATUS_REG,
-						ATL_BUF_FILL | INT_BUF_FILL);
-
-	/* GRR this is run-once init(), being done every time the HC starts.
-	 * So long as they're part of class devices, we can't do it init()
-	 * since the class device isn't created that early.
-	 */
-	return 0;
-}
-
-static int qtd_fill(struct isp1760_qtd *qtd, void *databuffer, size_t len)
-{
-	qtd->data_buffer = databuffer;
-
-	if (len > MAX_PAYLOAD_SIZE)
-		len = MAX_PAYLOAD_SIZE;
-	qtd->length = len;
-
-	return qtd->length;
-}
-
-static void qtd_list_free(struct list_head *qtd_list)
-{
-	struct isp1760_qtd *qtd, *qtd_next;
-
-	list_for_each_entry_safe(qtd, qtd_next, qtd_list, qtd_list) {
-		list_del(&qtd->qtd_list);
-		qtd_free(qtd);
-	}
-}
-
-/*
- * Packetize urb->transfer_buffer into list of packets of size wMaxPacketSize.
- * Also calculate the PID type (SETUP/IN/OUT) for each packet.
- */
-#define max_packet(wMaxPacketSize) ((wMaxPacketSize) & 0x07ff)
-static void packetize_urb(struct usb_hcd *hcd,
-		struct urb *urb, struct list_head *head, gfp_t flags)
-{
-	struct isp1760_qtd *qtd;
-	void *buf;
-	int len, maxpacketsize;
-	u8 packet_type;
-
-	/*
-	 * URBs map to sequences of QTDs:  one logical transaction
-	 */
-
-	if (!urb->transfer_buffer && urb->transfer_buffer_length) {
-		/* XXX This looks like usb storage / SCSI bug */
-		dev_err(hcd->self.controller,
-				"buf is null, dma is %08lx len is %d\n",
-				(long unsigned)urb->transfer_dma,
-				urb->transfer_buffer_length);
-		WARN_ON(1);
-	}
-
-	if (usb_pipein(urb->pipe))
-		packet_type = IN_PID;
-	else
-		packet_type = OUT_PID;
-
-	if (usb_pipecontrol(urb->pipe)) {
-		qtd = qtd_alloc(flags, urb, SETUP_PID);
-		if (!qtd)
-			goto cleanup;
-		qtd_fill(qtd, urb->setup_packet, sizeof(struct usb_ctrlrequest));
-		list_add_tail(&qtd->qtd_list, head);
-
-		/* for zero length DATA stages, STATUS is always IN */
-		if (urb->transfer_buffer_length == 0)
-			packet_type = IN_PID;
-	}
-
-	maxpacketsize = max_packet(usb_maxpacket(urb->dev, urb->pipe,
-						usb_pipeout(urb->pipe)));
-
-	/*
-	 * buffer gets wrapped in one or more qtds;
-	 * last one may be "short" (including zero len)
-	 * and may serve as a control status ack
-	 */
-	buf = urb->transfer_buffer;
-	len = urb->transfer_buffer_length;
-
-	for (;;) {
-		int this_qtd_len;
-
-		qtd = qtd_alloc(flags, urb, packet_type);
-		if (!qtd)
-			goto cleanup;
-		this_qtd_len = qtd_fill(qtd, buf, len);
-		list_add_tail(&qtd->qtd_list, head);
-
-		len -= this_qtd_len;
-		buf += this_qtd_len;
-
-		if (len <= 0)
-			break;
-	}
-
-	/*
-	 * control requests may need a terminating data "status" ack;
-	 * bulk ones may need a terminating short packet (zero length).
-	 */
-	if (urb->transfer_buffer_length != 0) {
-		int one_more = 0;
-
-		if (usb_pipecontrol(urb->pipe)) {
-			one_more = 1;
-			if (packet_type == IN_PID)
-				packet_type = OUT_PID;
-			else
-				packet_type = IN_PID;
-		} else if (usb_pipebulk(urb->pipe)
-				&& (urb->transfer_flags & URB_ZERO_PACKET)
-				&& !(urb->transfer_buffer_length %
-							maxpacketsize)) {
-			one_more = 1;
-		}
-		if (one_more) {
-			qtd = qtd_alloc(flags, urb, packet_type);
-			if (!qtd)
-				goto cleanup;
-
-			/* never any data in such packets */
-			qtd_fill(qtd, NULL, 0);
-			list_add_tail(&qtd->qtd_list, head);
-		}
-	}
-
-	return;
-
-cleanup:
-	qtd_list_free(head);
-}
-
-static int isp1760_urb_enqueue(struct usb_hcd *hcd, struct urb *urb,
-		gfp_t mem_flags)
-{
-	struct isp1760_hcd *priv = hcd_to_priv(hcd);
-	struct list_head *ep_queue;
-	struct isp1760_qh *qh, *qhit;
-	unsigned long spinflags;
-	LIST_HEAD(new_qtds);
-	int retval;
-	int qh_in_queue;
-
-	switch (usb_pipetype(urb->pipe)) {
-	case PIPE_CONTROL:
-		ep_queue = &priv->qh_list[QH_CONTROL];
-		break;
-	case PIPE_BULK:
-		ep_queue = &priv->qh_list[QH_BULK];
-		break;
-	case PIPE_INTERRUPT:
-		if (urb->interval < 0)
-			return -EINVAL;
-		/* FIXME: Check bandwidth  */
-		ep_queue = &priv->qh_list[QH_INTERRUPT];
-		break;
-	case PIPE_ISOCHRONOUS:
-		dev_err(hcd->self.controller, "%s: isochronous USB packets "
-							"not yet supported\n",
-							__func__);
-		return -EPIPE;
-	default:
-		dev_err(hcd->self.controller, "%s: unknown pipe type\n",
-							__func__);
-		return -EPIPE;
-	}
-
-	if (usb_pipein(urb->pipe))
-		urb->actual_length = 0;
-
-	packetize_urb(hcd, urb, &new_qtds, mem_flags);
-	if (list_empty(&new_qtds))
-		return -ENOMEM;
-
-	retval = 0;
-	spin_lock_irqsave(&priv->lock, spinflags);
-
-	if (!test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags)) {
-		retval = -ESHUTDOWN;
-		qtd_list_free(&new_qtds);
-		goto out;
-	}
-	retval = usb_hcd_link_urb_to_ep(hcd, urb);
-	if (retval) {
-		qtd_list_free(&new_qtds);
-		goto out;
-	}
-
-	qh = urb->ep->hcpriv;
-	if (qh) {
-		qh_in_queue = 0;
-		list_for_each_entry(qhit, ep_queue, qh_list) {
-			if (qhit == qh) {
-				qh_in_queue = 1;
-				break;
-			}
-		}
-		if (!qh_in_queue)
-			list_add_tail(&qh->qh_list, ep_queue);
-	} else {
-		qh = qh_alloc(GFP_ATOMIC);
-		if (!qh) {
-			retval = -ENOMEM;
-			usb_hcd_unlink_urb_from_ep(hcd, urb);
-			qtd_list_free(&new_qtds);
-			goto out;
-		}
-		list_add_tail(&qh->qh_list, ep_queue);
-		urb->ep->hcpriv = qh;
-	}
-
-	list_splice_tail(&new_qtds, &qh->qtd_list);
-	schedule_ptds(hcd);
-
-out:
-	spin_unlock_irqrestore(&priv->lock, spinflags);
-	return retval;
-}
-
-static void kill_transfer(struct usb_hcd *hcd, struct urb *urb,
-		struct isp1760_qh *qh)
-{
-	struct isp1760_hcd *priv = hcd_to_priv(hcd);
-	int skip_map;
-
-	WARN_ON(qh->slot == -1);
-
-	/* We need to forcefully reclaim the slot since some transfers never
-	   return, e.g. interrupt transfers and NAKed bulk transfers. */
-	if (usb_pipecontrol(urb->pipe) || usb_pipebulk(urb->pipe)) {
-		skip_map = reg_read32(hcd->regs, HC_ATL_PTD_SKIPMAP_REG);
-		skip_map |= (1 << qh->slot);
-		reg_write32(hcd->regs, HC_ATL_PTD_SKIPMAP_REG, skip_map);
-		priv->atl_slots[qh->slot].qh = NULL;
-		priv->atl_slots[qh->slot].qtd = NULL;
-	} else {
-		skip_map = reg_read32(hcd->regs, HC_INT_PTD_SKIPMAP_REG);
-		skip_map |= (1 << qh->slot);
-		reg_write32(hcd->regs, HC_INT_PTD_SKIPMAP_REG, skip_map);
-		priv->int_slots[qh->slot].qh = NULL;
-		priv->int_slots[qh->slot].qtd = NULL;
-	}
-
-	qh->slot = -1;
-}
-
-/*
- * Retire the qtds beginning at 'qtd' and belonging all to the same urb, killing
- * any active transfer belonging to the urb in the process.
- */
-static void dequeue_urb_from_qtd(struct usb_hcd *hcd, struct isp1760_qh *qh,
-						struct isp1760_qtd *qtd)
-{
-	struct urb *urb;
-	int urb_was_running;
-
-	urb = qtd->urb;
-	urb_was_running = 0;
-	list_for_each_entry_from(qtd, &qh->qtd_list, qtd_list) {
-		if (qtd->urb != urb)
-			break;
-
-		if (qtd->status >= QTD_XFER_STARTED)
-			urb_was_running = 1;
-		if (last_qtd_of_urb(qtd, qh) &&
-					(qtd->status >= QTD_XFER_COMPLETE))
-			urb_was_running = 0;
-
-		if (qtd->status == QTD_XFER_STARTED)
-			kill_transfer(hcd, urb, qh);
-		qtd->status = QTD_RETIRE;
-	}
-
-	if ((urb->dev->speed != USB_SPEED_HIGH) && urb_was_running) {
-		qh->tt_buffer_dirty = 1;
-		if (usb_hub_clear_tt_buffer(urb))
-			/* Clear failed; let's hope things work anyway */
-			qh->tt_buffer_dirty = 0;
-	}
-}
-
-static int isp1760_urb_dequeue(struct usb_hcd *hcd, struct urb *urb,
-		int status)
-{
-	struct isp1760_hcd *priv = hcd_to_priv(hcd);
-	unsigned long spinflags;
-	struct isp1760_qh *qh;
-	struct isp1760_qtd *qtd;
-	int retval = 0;
-
-	spin_lock_irqsave(&priv->lock, spinflags);
-	retval = usb_hcd_check_unlink_urb(hcd, urb, status);
-	if (retval)
-		goto out;
-
-	qh = urb->ep->hcpriv;
-	if (!qh) {
-		retval = -EINVAL;
-		goto out;
-	}
-
-	list_for_each_entry(qtd, &qh->qtd_list, qtd_list)
-		if (qtd->urb == urb) {
-			dequeue_urb_from_qtd(hcd, qh, qtd);
-			list_move(&qtd->qtd_list, &qh->qtd_list);
-			break;
-		}
-
-	urb->status = status;
-	schedule_ptds(hcd);
-
-out:
-	spin_unlock_irqrestore(&priv->lock, spinflags);
-	return retval;
-}
-
-static void isp1760_endpoint_disable(struct usb_hcd *hcd,
-		struct usb_host_endpoint *ep)
-{
-	struct isp1760_hcd *priv = hcd_to_priv(hcd);
-	unsigned long spinflags;
-	struct isp1760_qh *qh, *qh_iter;
-	int i;
-
-	spin_lock_irqsave(&priv->lock, spinflags);
-
-	qh = ep->hcpriv;
-	if (!qh)
-		goto out;
-
-	WARN_ON(!list_empty(&qh->qtd_list));
-
-	for (i = 0; i < QH_END; i++)
-		list_for_each_entry(qh_iter, &priv->qh_list[i], qh_list)
-			if (qh_iter == qh) {
-				list_del(&qh_iter->qh_list);
-				i = QH_END;
-				break;
-			}
-	qh_free(qh);
-	ep->hcpriv = NULL;
-
-	schedule_ptds(hcd);
-
-out:
-	spin_unlock_irqrestore(&priv->lock, spinflags);
-}
-
-static int isp1760_hub_status_data(struct usb_hcd *hcd, char *buf)
-{
-	struct isp1760_hcd *priv = hcd_to_priv(hcd);
-	u32 temp, status = 0;
-	u32 mask;
-	int retval = 1;
-	unsigned long flags;
-
-	/* if !PM, root hub timers won't get shut down ... */
-	if (!HC_IS_RUNNING(hcd->state))
-		return 0;
-
-	/* init status to no-changes */
-	buf[0] = 0;
-	mask = PORT_CSC;
-
-	spin_lock_irqsave(&priv->lock, flags);
-	temp = reg_read32(hcd->regs, HC_PORTSC1);
-
-	if (temp & PORT_OWNER) {
-		if (temp & PORT_CSC) {
-			temp &= ~PORT_CSC;
-			reg_write32(hcd->regs, HC_PORTSC1, temp);
-			goto done;
-		}
-	}
-
-	/*
-	 * Return status information even for ports with OWNER set.
-	 * Otherwise hub_wq wouldn't see the disconnect event when a
-	 * high-speed device is switched over to the companion
-	 * controller by the user.
-	 */
-
-	if ((temp & mask) != 0
-			|| ((temp & PORT_RESUME) != 0
-				&& time_after_eq(jiffies,
-					priv->reset_done))) {
-		buf [0] |= 1 << (0 + 1);
-		status = STS_PCD;
-	}
-	/* FIXME autosuspend idle root hubs */
-done:
-	spin_unlock_irqrestore(&priv->lock, flags);
-	return status ? retval : 0;
-}
-
-static void isp1760_hub_descriptor(struct isp1760_hcd *priv,
-		struct usb_hub_descriptor *desc)
-{
-	int ports = HCS_N_PORTS(priv->hcs_params);
-	u16 temp;
-
-	desc->bDescriptorType = 0x29;
-	/* priv 1.0, 2.3.9 says 20ms max */
-	desc->bPwrOn2PwrGood = 10;
-	desc->bHubContrCurrent = 0;
-
-	desc->bNbrPorts = ports;
-	temp = 1 + (ports / 8);
-	desc->bDescLength = 7 + 2 * temp;
-
-	/* ports removable, and usb 1.0 legacy PortPwrCtrlMask */
-	memset(&desc->u.hs.DeviceRemovable[0], 0, temp);
-	memset(&desc->u.hs.DeviceRemovable[temp], 0xff, temp);
-
-	/* per-port overcurrent reporting */
-	temp = 0x0008;
-	if (HCS_PPC(priv->hcs_params))
-		/* per-port power control */
-		temp |= 0x0001;
-	else
-		/* no power switching */
-		temp |= 0x0002;
-	desc->wHubCharacteristics = cpu_to_le16(temp);
-}
-
-#define	PORT_WAKE_BITS	(PORT_WKOC_E|PORT_WKDISC_E|PORT_WKCONN_E)
-
-static int check_reset_complete(struct usb_hcd *hcd, int index,
-		int port_status)
-{
-	if (!(port_status & PORT_CONNECT))
-		return port_status;
-
-	/* if reset finished and it's still not enabled -- handoff */
-	if (!(port_status & PORT_PE)) {
-
-		dev_info(hcd->self.controller,
-					"port %d full speed --> companion\n",
-					index + 1);
-
-		port_status |= PORT_OWNER;
-		port_status &= ~PORT_RWC_BITS;
-		reg_write32(hcd->regs, HC_PORTSC1, port_status);
-
-	} else
-		dev_info(hcd->self.controller, "port %d high speed\n",
-								index + 1);
-
-	return port_status;
-}
-
-static int isp1760_hub_control(struct usb_hcd *hcd, u16 typeReq,
-		u16 wValue, u16 wIndex, char *buf, u16 wLength)
-{
-	struct isp1760_hcd *priv = hcd_to_priv(hcd);
-	int ports = HCS_N_PORTS(priv->hcs_params);
-	u32 temp, status;
-	unsigned long flags;
-	int retval = 0;
-	unsigned selector;
-
-	/*
-	 * FIXME:  support SetPortFeatures USB_PORT_FEAT_INDICATOR.
-	 * HCS_INDICATOR may say we can change LEDs to off/amber/green.
-	 * (track current state ourselves) ... blink for diagnostics,
-	 * power, "this is the one", etc.  EHCI spec supports this.
-	 */
-
-	spin_lock_irqsave(&priv->lock, flags);
-	switch (typeReq) {
-	case ClearHubFeature:
-		switch (wValue) {
-		case C_HUB_LOCAL_POWER:
-		case C_HUB_OVER_CURRENT:
-			/* no hub-wide feature/status flags */
-			break;
-		default:
-			goto error;
-		}
-		break;
-	case ClearPortFeature:
-		if (!wIndex || wIndex > ports)
-			goto error;
-		wIndex--;
-		temp = reg_read32(hcd->regs, HC_PORTSC1);
-
-		/*
-		 * Even if OWNER is set, so the port is owned by the
-		 * companion controller, hub_wq needs to be able to clear
-		 * the port-change status bits (especially
-		 * USB_PORT_STAT_C_CONNECTION).
-		 */
-
-		switch (wValue) {
-		case USB_PORT_FEAT_ENABLE:
-			reg_write32(hcd->regs, HC_PORTSC1, temp & ~PORT_PE);
-			break;
-		case USB_PORT_FEAT_C_ENABLE:
-			/* XXX error? */
-			break;
-		case USB_PORT_FEAT_SUSPEND:
-			if (temp & PORT_RESET)
-				goto error;
-
-			if (temp & PORT_SUSPEND) {
-				if ((temp & PORT_PE) == 0)
-					goto error;
-				/* resume signaling for 20 msec */
-				temp &= ~(PORT_RWC_BITS);
-				reg_write32(hcd->regs, HC_PORTSC1,
-							temp | PORT_RESUME);
-				priv->reset_done = jiffies +
-					msecs_to_jiffies(20);
-			}
-			break;
-		case USB_PORT_FEAT_C_SUSPEND:
-			/* we auto-clear this feature */
-			break;
-		case USB_PORT_FEAT_POWER:
-			if (HCS_PPC(priv->hcs_params))
-				reg_write32(hcd->regs, HC_PORTSC1,
-							temp & ~PORT_POWER);
-			break;
-		case USB_PORT_FEAT_C_CONNECTION:
-			reg_write32(hcd->regs, HC_PORTSC1, temp | PORT_CSC);
-			break;
-		case USB_PORT_FEAT_C_OVER_CURRENT:
-			/* XXX error ?*/
-			break;
-		case USB_PORT_FEAT_C_RESET:
-			/* GetPortStatus clears reset */
-			break;
-		default:
-			goto error;
-		}
-		reg_read32(hcd->regs, HC_USBCMD);
-		break;
-	case GetHubDescriptor:
-		isp1760_hub_descriptor(priv, (struct usb_hub_descriptor *)
-			buf);
-		break;
-	case GetHubStatus:
-		/* no hub-wide feature/status flags */
-		memset(buf, 0, 4);
-		break;
-	case GetPortStatus:
-		if (!wIndex || wIndex > ports)
-			goto error;
-		wIndex--;
-		status = 0;
-		temp = reg_read32(hcd->regs, HC_PORTSC1);
-
-		/* wPortChange bits */
-		if (temp & PORT_CSC)
-			status |= USB_PORT_STAT_C_CONNECTION << 16;
-
-
-		/* whoever resumes must GetPortStatus to complete it!! */
-		if (temp & PORT_RESUME) {
-			dev_err(hcd->self.controller, "Port resume should be skipped.\n");
-
-			/* Remote Wakeup received? */
-			if (!priv->reset_done) {
-				/* resume signaling for 20 msec */
-				priv->reset_done = jiffies
-						+ msecs_to_jiffies(20);
-				/* check the port again */
-				mod_timer(&hcd->rh_timer, priv->reset_done);
-			}
-
-			/* resume completed? */
-			else if (time_after_eq(jiffies,
-					priv->reset_done)) {
-				status |= USB_PORT_STAT_C_SUSPEND << 16;
-				priv->reset_done = 0;
-
-				/* stop resume signaling */
-				temp = reg_read32(hcd->regs, HC_PORTSC1);
-				reg_write32(hcd->regs, HC_PORTSC1,
-					temp & ~(PORT_RWC_BITS | PORT_RESUME));
-				retval = handshake(hcd, HC_PORTSC1,
-					   PORT_RESUME, 0, 2000 /* 2msec */);
-				if (retval != 0) {
-					dev_err(hcd->self.controller,
-						"port %d resume error %d\n",
-						wIndex + 1, retval);
-					goto error;
-				}
-				temp &= ~(PORT_SUSPEND|PORT_RESUME|(3<<10));
-			}
-		}
-
-		/* whoever resets must GetPortStatus to complete it!! */
-		if ((temp & PORT_RESET)
-				&& time_after_eq(jiffies,
-					priv->reset_done)) {
-			status |= USB_PORT_STAT_C_RESET << 16;
-			priv->reset_done = 0;
-
-			/* force reset to complete */
-			reg_write32(hcd->regs, HC_PORTSC1, temp & ~PORT_RESET);
-			/* REVISIT:  some hardware needs 550+ usec to clear
-			 * this bit; seems too long to spin routinely...
-			 */
-			retval = handshake(hcd, HC_PORTSC1,
-					PORT_RESET, 0, 750);
-			if (retval != 0) {
-				dev_err(hcd->self.controller, "port %d reset error %d\n",
-						wIndex + 1, retval);
-				goto error;
-			}
-
-			/* see what we found out */
-			temp = check_reset_complete(hcd, wIndex,
-					reg_read32(hcd->regs, HC_PORTSC1));
-		}
-		/*
-		 * Even if OWNER is set, there's no harm letting hub_wq
-		 * see the wPortStatus values (they should all be 0 except
-		 * for PORT_POWER anyway).
-		 */
-
-		if (temp & PORT_OWNER)
-			dev_err(hcd->self.controller, "PORT_OWNER is set\n");
-
-		if (temp & PORT_CONNECT) {
-			status |= USB_PORT_STAT_CONNECTION;
-			/* status may be from integrated TT */
-			status |= USB_PORT_STAT_HIGH_SPEED;
-		}
-		if (temp & PORT_PE)
-			status |= USB_PORT_STAT_ENABLE;
-		if (temp & (PORT_SUSPEND|PORT_RESUME))
-			status |= USB_PORT_STAT_SUSPEND;
-		if (temp & PORT_RESET)
-			status |= USB_PORT_STAT_RESET;
-		if (temp & PORT_POWER)
-			status |= USB_PORT_STAT_POWER;
-
-		put_unaligned(cpu_to_le32(status), (__le32 *) buf);
-		break;
-	case SetHubFeature:
-		switch (wValue) {
-		case C_HUB_LOCAL_POWER:
-		case C_HUB_OVER_CURRENT:
-			/* no hub-wide feature/status flags */
-			break;
-		default:
-			goto error;
-		}
-		break;
-	case SetPortFeature:
-		selector = wIndex >> 8;
-		wIndex &= 0xff;
-		if (!wIndex || wIndex > ports)
-			goto error;
-		wIndex--;
-		temp = reg_read32(hcd->regs, HC_PORTSC1);
-		if (temp & PORT_OWNER)
-			break;
-
-/*		temp &= ~PORT_RWC_BITS; */
-		switch (wValue) {
-		case USB_PORT_FEAT_ENABLE:
-			reg_write32(hcd->regs, HC_PORTSC1, temp | PORT_PE);
-			break;
-
-		case USB_PORT_FEAT_SUSPEND:
-			if ((temp & PORT_PE) == 0
-					|| (temp & PORT_RESET) != 0)
-				goto error;
-
-			reg_write32(hcd->regs, HC_PORTSC1, temp | PORT_SUSPEND);
-			break;
-		case USB_PORT_FEAT_POWER:
-			if (HCS_PPC(priv->hcs_params))
-				reg_write32(hcd->regs, HC_PORTSC1,
-							temp | PORT_POWER);
-			break;
-		case USB_PORT_FEAT_RESET:
-			if (temp & PORT_RESUME)
-				goto error;
-			/* line status bits may report this as low speed,
-			 * which can be fine if this root hub has a
-			 * transaction translator built in.
-			 */
-			if ((temp & (PORT_PE|PORT_CONNECT)) == PORT_CONNECT
-					&& PORT_USB11(temp)) {
-				temp |= PORT_OWNER;
-			} else {
-				temp |= PORT_RESET;
-				temp &= ~PORT_PE;
-
-				/*
-				 * caller must wait, then call GetPortStatus
-				 * usb 2.0 spec says 50 ms resets on root
-				 */
-				priv->reset_done = jiffies +
-					msecs_to_jiffies(50);
-			}
-			reg_write32(hcd->regs, HC_PORTSC1, temp);
-			break;
-		default:
-			goto error;
-		}
-		reg_read32(hcd->regs, HC_USBCMD);
-		break;
-
-	default:
-error:
-		/* "stall" on error */
-		retval = -EPIPE;
-	}
-	spin_unlock_irqrestore(&priv->lock, flags);
-	return retval;
-}
-
-static int isp1760_get_frame(struct usb_hcd *hcd)
-{
-	struct isp1760_hcd *priv = hcd_to_priv(hcd);
-	u32 fr;
-
-	fr = reg_read32(hcd->regs, HC_FRINDEX);
-	return (fr >> 3) % priv->periodic_size;
-}
-
-static void isp1760_stop(struct usb_hcd *hcd)
-{
-	struct isp1760_hcd *priv = hcd_to_priv(hcd);
-	u32 temp;
-
-	del_timer(&errata2_timer);
-
-	isp1760_hub_control(hcd, ClearPortFeature, USB_PORT_FEAT_POWER,	1,
-			NULL, 0);
-	mdelay(20);
-
-	spin_lock_irq(&priv->lock);
-	ehci_reset(hcd);
-	/* Disable IRQ */
-	temp = reg_read32(hcd->regs, HC_HW_MODE_CTRL);
-	reg_write32(hcd->regs, HC_HW_MODE_CTRL, temp &= ~HW_GLOBAL_INTR_EN);
-	spin_unlock_irq(&priv->lock);
-
-	reg_write32(hcd->regs, HC_CONFIGFLAG, 0);
-}
-
-static void isp1760_shutdown(struct usb_hcd *hcd)
-{
-	u32 command, temp;
-
-	isp1760_stop(hcd);
-	temp = reg_read32(hcd->regs, HC_HW_MODE_CTRL);
-	reg_write32(hcd->regs, HC_HW_MODE_CTRL, temp &= ~HW_GLOBAL_INTR_EN);
-
-	command = reg_read32(hcd->regs, HC_USBCMD);
-	command &= ~CMD_RUN;
-	reg_write32(hcd->regs, HC_USBCMD, command);
-}
-
-static void isp1760_clear_tt_buffer_complete(struct usb_hcd *hcd,
-						struct usb_host_endpoint *ep)
-{
-	struct isp1760_hcd *priv = hcd_to_priv(hcd);
-	struct isp1760_qh *qh = ep->hcpriv;
-	unsigned long spinflags;
-
-	if (!qh)
-		return;
-
-	spin_lock_irqsave(&priv->lock, spinflags);
-	qh->tt_buffer_dirty = 0;
-	schedule_ptds(hcd);
-	spin_unlock_irqrestore(&priv->lock, spinflags);
-}
-
-
-static const struct hc_driver isp1760_hc_driver = {
-	.description		= "isp1760-hcd",
-	.product_desc		= "NXP ISP1760 USB Host Controller",
-	.hcd_priv_size		= sizeof(struct isp1760_hcd *),
-	.irq			= isp1760_irq,
-	.flags			= HCD_MEMORY | HCD_USB2,
-	.reset			= isp1760_hc_setup,
-	.start			= isp1760_run,
-	.stop			= isp1760_stop,
-	.shutdown		= isp1760_shutdown,
-	.urb_enqueue		= isp1760_urb_enqueue,
-	.urb_dequeue		= isp1760_urb_dequeue,
-	.endpoint_disable	= isp1760_endpoint_disable,
-	.get_frame_number	= isp1760_get_frame,
-	.hub_status_data	= isp1760_hub_status_data,
-	.hub_control		= isp1760_hub_control,
-	.clear_tt_buffer_complete	= isp1760_clear_tt_buffer_complete,
-};
-
-int __init isp1760_init_kmem_once(void)
-{
-	urb_listitem_cachep = kmem_cache_create("isp1760_urb_listitem",
-			sizeof(struct urb_listitem), 0, SLAB_TEMPORARY |
-			SLAB_MEM_SPREAD, NULL);
-
-	if (!urb_listitem_cachep)
-		return -ENOMEM;
-
-	qtd_cachep = kmem_cache_create("isp1760_qtd",
-			sizeof(struct isp1760_qtd), 0, SLAB_TEMPORARY |
-			SLAB_MEM_SPREAD, NULL);
-
-	if (!qtd_cachep)
-		return -ENOMEM;
-
-	qh_cachep = kmem_cache_create("isp1760_qh", sizeof(struct isp1760_qh),
-			0, SLAB_TEMPORARY | SLAB_MEM_SPREAD, NULL);
-
-	if (!qh_cachep) {
-		kmem_cache_destroy(qtd_cachep);
-		return -ENOMEM;
-	}
-
-	return 0;
-}
-
-void isp1760_deinit_kmem_cache(void)
-{
-	kmem_cache_destroy(qtd_cachep);
-	kmem_cache_destroy(qh_cachep);
-	kmem_cache_destroy(urb_listitem_cachep);
-}
-
-int isp1760_hcd_register(struct isp1760_hcd *priv, void __iomem *regs,
-			 struct resource *mem, int irq, unsigned long irqflags,
-			 struct device *dev)
-{
-	struct usb_hcd *hcd;
-	int ret;
-
-	hcd = usb_create_hcd(&isp1760_hc_driver, dev, dev_name(dev));
-	if (!hcd)
-		return -ENOMEM;
-
-	*(struct isp1760_hcd **)hcd->hcd_priv = priv;
-
-	priv->hcd = hcd;
-
-	init_memory(priv);
-
-	hcd->irq = irq;
-	hcd->regs = regs;
-	hcd->rsrc_start = mem->start;
-	hcd->rsrc_len = resource_size(mem);
-
-	ret = usb_add_hcd(hcd, irq, irqflags);
-	if (ret)
-		goto error;
-
-	device_wakeup_enable(hcd->self.controller);
-
-	return 0;
-
-error:
-	usb_put_hcd(hcd);
-	return ret;
-}
-
-void isp1760_hcd_unregister(struct isp1760_hcd *priv)
-{
-	usb_remove_hcd(priv->hcd);
-	usb_put_hcd(priv->hcd);
-}