aboutsummaryrefslogblamecommitdiffstats
path: root/drivers/usb/host/isp1760-hcd.c
blob: 8017f1cf78e244b0f37c4a32d2833de3d2d2a586 (plain) (tree)
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
1723
1724
1725
1726
1727
1728
1729
1730
1731
1732
1733
1734
1735
1736
1737
1738
1739
1740
1741
1742
1743
1744
1745
1746
1747
1748
1749
1750
1751
1752
1753
1754
1755
1756
1757
1758
1759
1760
1761
1762
1763
1764
1765
1766
1767
1768
1769
1770
1771
1772
1773
1774
1775
1776
1777
1778
1779
1780
1781
1782
1783
1784
1785
1786
1787
1788
1789
1790
1791
1792
1793
1794
1795
1796
1797
1798
1799
1800
1801
1802
1803
1804
1805
1806
1807
1808
1809
1810
1811
1812
1813
1814
1815
1816
1817
1818
1819
1820
1821
1822
1823
1824
1825
1826
1827
1828
1829
1830
1831
1832
1833
1834
1835
1836
1837
1838
1839
1840
1841
1842
1843
1844
1845
1846
1847
1848
1849
1850
1851
1852
1853
1854
1855
1856
1857
1858
1859
1860
1861
1862
1863
1864
1865
1866
1867
1868
1869
1870
1871
1872
1873
1874
1875
1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027
2028
2029
2030
2031
2032
2033
2034
2035
2036
2037
2038
2039
2040
2041
2042
2043
2044
2045
2046
2047
2048
2049
2050
2051
2052
2053
2054
2055
2056
2057
2058
2059
2060
2061
2062
2063
2064
2065
2066
2067
2068
2069
2070
2071
2072
2073
2074
2075
2076
2077
2078
2079
2080
2081
2082
2083
2084
2085
2086
2087
2088
2089
2090
2091
2092
2093
2094
2095
2096
2097
2098
2099
2100
2101
2102
2103
2104
2105
2106
2107
2108
2109
2110
2111
2112
2113
2114







































                                                                            
                                         






















































































                                                                                
                                            
 






                                                                         













































































































































































































































                                                                              




















                                                                              

                                                               

                                                            





















                                                                     



                                                                               

                       
                                                                            
                   
                                                            
 












                                                                               






































                                                                       
                                                                              






































































































































































































































































































































                                                                                

                                                                             































                                                                              

                                                                             






































































































































                                                                                   






                                                                           
                                                                      





                                                                            
































                                                                                
                                                                                



































































                                                                                
                                                                              





























                                                                               

                                                                     


                                                                               














































































                                                                            













                                                                            

































                                                                                
                                                                              



















































































































































































































































































































































































                                                                                
                                                                            








                                                                    
                            



















































































































































































































































































































































































































































































                                                                               
                            

















































                                                                            
                 







                                                                          

                                                                                






                                                     
                          

                          

                                                                                


















































                                                                              

                                                                      










                                                   
                                                                     



                                        
                                  






                                                



                                    



                                              













                                                                     
/*
 * 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>
 *
 */
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/list.h>
#include <linux/usb.h>
#include <linux/debugfs.h>
#include <linux/uaccess.h>
#include <linux/io.h>
#include <asm/unaligned.h>

#include "../core/hcd.h"
#include "isp1760-hcd.h"

static struct kmem_cache *qtd_cachep;
static struct kmem_cache *qh_cachep;

struct isp1760_hcd {
	u32 hcs_params;
	spinlock_t		lock;
	struct inter_packet_info atl_ints[32];
	struct inter_packet_info int_ints[32];
	struct memory_chunk memory_pool[BLOCKS];

	/* periodic schedule support */
#define	DEFAULT_I_TDPS		1024
	unsigned		periodic_size;
	unsigned		i_thresh;
	unsigned long		reset_done;
	unsigned long		next_statechange;
	unsigned int		devflags;
};

static inline struct isp1760_hcd *hcd_to_priv(struct usb_hcd *hcd)
{
	return (struct isp1760_hcd *) (hcd->hcd_priv);
}
static inline struct usb_hcd *priv_to_hcd(struct isp1760_hcd *priv)
{
	return container_of((void *) priv, struct usb_hcd, hcd_priv);
}

/* Section 2.2 Host Controller Capability Registers */
#define HC_LENGTH(p)		(((p)>>00)&0x00ff)	/* bits 7:0 */
#define HC_VERSION(p)		(((p)>>16)&0xffff)	/* bits 31:16 */
#define HCS_INDICATOR(p)	((p)&(1 << 16))	/* true: has port indicators */
#define HCS_PPC(p)		((p)&(1 << 4))	/* true: port power control */
#define HCS_N_PORTS(p)		(((p)>>0)&0xf)	/* bits 3:0, ports on HC */
#define HCC_ISOC_CACHE(p)       ((p)&(1 << 7))  /* true: can cache isoc frame */
#define HCC_ISOC_THRES(p)       (((p)>>4)&0x7)  /* bits 6:4, uframes cached */

/* Section 2.3 Host Controller Operational Registers */
#define CMD_LRESET	(1<<7)		/* partial reset (no ports, etc) */
#define CMD_RESET	(1<<1)		/* reset HC not bus */
#define CMD_RUN		(1<<0)		/* start/stop HC */
#define STS_PCD		(1<<2)		/* port change detect */
#define FLAG_CF		(1<<0)		/* true: we'll support "high speed" */

#define PORT_OWNER	(1<<13)		/* true: companion hc owns this port */
#define PORT_POWER	(1<<12)		/* true: has power (see PPC) */
#define PORT_USB11(x) (((x) & (3 << 10)) == (1 << 10))	/* USB 1.1 device */
#define PORT_RESET	(1<<8)		/* reset port */
#define PORT_SUSPEND	(1<<7)		/* suspend port */
#define PORT_RESUME	(1<<6)		/* resume it */
#define PORT_PE		(1<<2)		/* port enable */
#define PORT_CSC	(1<<1)		/* connect status change */
#define PORT_CONNECT	(1<<0)		/* device connected */
#define PORT_RWC_BITS   (PORT_CSC)

struct isp1760_qtd {
	struct isp1760_qtd *hw_next;
	u8 packet_type;
	u8 toggle;

	void *data_buffer;
	/* the rest is HCD-private */
	struct list_head qtd_list;
	struct urb *urb;
	size_t length;

	/* isp special*/
	u32 status;
#define URB_COMPLETE_NOTIFY	(1 << 0)
#define URB_ENQUEUED		(1 << 1)
#define URB_TYPE_ATL		(1 << 2)
#define URB_TYPE_INT		(1 << 3)
};

struct isp1760_qh {
	/* first part defined by EHCI spec */
	struct list_head qtd_list;
	struct isp1760_hcd *priv;

	/* periodic schedule info */
	unsigned short period;		/* polling interval */
	struct usb_device *dev;

	u32 toggle;
	u32 ping;
};

#define ehci_port_speed(priv, portsc) (1 << USB_PORT_FEAT_HIGHSPEED)

static unsigned int isp1760_readl(__u32 __iomem *regs)
{
	return readl(regs);
}

static void isp1760_writel(const unsigned int val, __u32 __iomem *regs)
{
	writel(val, regs);
}

/*
 * The next two 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 priv_read_copy(struct isp1760_hcd *priv, u32 *src,
		__u32 __iomem *dst, u32 len)
{
	u32 val;
	u8 *buff8;

	if (!src) {
		printk(KERN_ERR "ERROR: buffer: %p len: %d\n", src, len);
		return;
	}

	while (len >= 4) {
		*src = __raw_readl(dst);
		len -= 4;
		src++;
		dst++;
	}

	if (!len)
		return;

	/* in case we have 3, 2 or 1 by left. The dst buffer may not be fully
	 * allocated.
	 */
	val = isp1760_readl(dst);

	buff8 = (u8 *)src;
	while (len) {

		*buff8 = val;
		val >>= 8;
		len--;
		buff8++;
	}
}

static void priv_write_copy(const struct isp1760_hcd *priv, const u32 *src,
		__u32 __iomem *dst, u32 len)
{
	while (len >= 4) {
		__raw_writel(*src, dst);
		len -= 4;
		src++;
		dst++;
	}

	if (!len)
		return;
	/* in case we have 3, 2 or 1 by left. The buffer is allocated and the
	 * extra bytes should not be read by the HW
	 */

	__raw_writel(*src, dst);
}

/* memory management of the 60kb on the chip from 0x1000 to 0xffff */
static void init_memory(struct isp1760_hcd *priv)
{
	int i;
	u32 payload;

	payload = 0x1000;
	for (i = 0; i < BLOCK_1_NUM; i++) {
		priv->memory_pool[i].start = payload;
		priv->memory_pool[i].size = BLOCK_1_SIZE;
		priv->memory_pool[i].free = 1;
		payload += priv->memory_pool[i].size;
	}


	for (i = BLOCK_1_NUM; i < BLOCK_1_NUM + BLOCK_2_NUM; i++) {
		priv->memory_pool[i].start = payload;
		priv->memory_pool[i].size = BLOCK_2_SIZE;
		priv->memory_pool[i].free = 1;
		payload += priv->memory_pool[i].size;
	}


	for (i = BLOCK_1_NUM + BLOCK_2_NUM; i < BLOCKS; i++) {
		priv->memory_pool[i].start = payload;
		priv->memory_pool[i].size = BLOCK_3_SIZE;
		priv->memory_pool[i].free = 1;
		payload += priv->memory_pool[i].size;
	}

	BUG_ON(payload - priv->memory_pool[i - 1].size > PAYLOAD_SIZE);
}

static u32 alloc_mem(struct isp1760_hcd *priv, u32 size)
{
	int i;

	if (!size)
		return ISP1760_NULL_POINTER;

	for (i = 0; i < BLOCKS; i++) {
		if (priv->memory_pool[i].size >= size &&
				priv->memory_pool[i].free) {

			priv->memory_pool[i].free = 0;
			return priv->memory_pool[i].start;
		}
	}

	printk(KERN_ERR "ISP1760 MEM: can not allocate %d bytes of memory\n",
			size);
	printk(KERN_ERR "Current memory map:\n");
	for (i = 0; i < BLOCKS; i++) {
		printk(KERN_ERR "Pool %2d size %4d status: %d\n",
				i, priv->memory_pool[i].size,
				priv->memory_pool[i].free);
	}
	/* XXX maybe -ENOMEM could be possible */
	BUG();
	return 0;
}

static void free_mem(struct isp1760_hcd *priv, u32 mem)
{
	int i;

	if (mem == ISP1760_NULL_POINTER)
		return;

	for (i = 0; i < BLOCKS; i++) {
		if (priv->memory_pool[i].start == mem) {

			BUG_ON(priv->memory_pool[i].free);

			priv->memory_pool[i].free = 1;
			return ;
		}
	}

	printk(KERN_ERR "Trying to free not-here-allocated memory :%08x\n",
			mem);
	BUG();
}

static void isp1760_init_regs(struct usb_hcd *hcd)
{
	isp1760_writel(0, hcd->regs + HC_BUFFER_STATUS_REG);
	isp1760_writel(NO_TRANSFER_ACTIVE, hcd->regs +
			HC_ATL_PTD_SKIPMAP_REG);
	isp1760_writel(NO_TRANSFER_ACTIVE, hcd->regs +
			HC_INT_PTD_SKIPMAP_REG);
	isp1760_writel(NO_TRANSFER_ACTIVE, hcd->regs +
			HC_ISO_PTD_SKIPMAP_REG);

	isp1760_writel(~NO_TRANSFER_ACTIVE, hcd->regs +
			HC_ATL_PTD_DONEMAP_REG);
	isp1760_writel(~NO_TRANSFER_ACTIVE, hcd->regs +
			HC_INT_PTD_DONEMAP_REG);
	isp1760_writel(~NO_TRANSFER_ACTIVE, hcd->regs +
			HC_ISO_PTD_DONEMAP_REG);
}

static int handshake(struct isp1760_hcd *priv, void __iomem *ptr,
		      u32 mask, u32 done, int usec)
{
	u32 result;

	do {
		result = isp1760_readl(ptr);
		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 isp1760_hcd *priv)
{
	int retval;
	struct usb_hcd *hcd = priv_to_hcd(priv);
	u32 command = isp1760_readl(hcd->regs + HC_USBCMD);

	command |= CMD_RESET;
	isp1760_writel(command, hcd->regs + HC_USBCMD);
	hcd->state = HC_STATE_HALT;
	priv->next_statechange = jiffies;
	retval = handshake(priv, hcd->regs + HC_USBCMD,
			    CMD_RESET, 0, 250 * 1000);
	return retval;
}

static void qh_destroy(struct isp1760_qh *qh)
{
	BUG_ON(!list_empty(&qh->qtd_list));
	kmem_cache_free(qh_cachep, qh);
}

static struct isp1760_qh *isp1760_qh_alloc(struct isp1760_hcd *priv,
		gfp_t flags)
{
	struct isp1760_qh *qh;

	qh = kmem_cache_zalloc(qh_cachep, flags);
	if (!qh)
		return qh;

	INIT_LIST_HEAD(&qh->qtd_list);
	qh->priv = priv;
	return qh;
}

/* 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 */

/* 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;

	spin_lock_init(&priv->lock);

	/*
	 * 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 = isp1760_readl(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;

	/* Setup HW Mode Control: This assumes a level active-low interrupt */
	hwmode = HW_DATA_BUS_32BIT;

	if (priv->devflags & ISP1760_FLAG_BUS_WIDTH_16)
		hwmode &= ~HW_DATA_BUS_32BIT;
	if (priv->devflags & ISP1760_FLAG_ANALOG_OC)
		hwmode |= HW_ANA_DIGI_OC;
	if (priv->devflags & ISP1760_FLAG_DACK_POL_HIGH)
		hwmode |= HW_DACK_POL_HIGH;
	if (priv->devflags & ISP1760_FLAG_DREQ_POL_HIGH)
		hwmode |= HW_DREQ_POL_HIGH;

	/*
	 * We have to set this first in case we're in 16-bit mode.
	 * Write it twice to ensure correct upper bits if switching
	 * to 16-bit mode.
	 */
	isp1760_writel(hwmode, hcd->regs + HC_HW_MODE_CTRL);
	isp1760_writel(hwmode, hcd->regs + HC_HW_MODE_CTRL);

	isp1760_writel(0xdeadbabe, hcd->regs + HC_SCRATCH_REG);
	/* Change bus pattern */
	scratch = isp1760_readl(hcd->regs + HC_CHIP_ID_REG);
	scratch = isp1760_readl(hcd->regs + HC_SCRATCH_REG);
	if (scratch != 0xdeadbabe) {
		printk(KERN_ERR "ISP1760: Scratch test failed.\n");
		return -ENODEV;
	}

	/* pre reset */
	isp1760_init_regs(hcd);

	/* reset */
	isp1760_writel(SW_RESET_RESET_ALL, hcd->regs + HC_RESET_REG);
	mdelay(100);

	isp1760_writel(SW_RESET_RESET_HC, hcd->regs + HC_RESET_REG);
	mdelay(100);

	result = ehci_reset(priv);
	if (result)
		return result;

	/* Step 11 passed */

	isp1760_info(priv, "bus width: %d, oc: %s\n",
			   (priv->devflags & ISP1760_FLAG_BUS_WIDTH_16) ?
			   16 : 32, (priv->devflags & ISP1760_FLAG_ANALOG_OC) ?
			   "analog" : "digital");

	/* ATL reset */
	isp1760_writel(hwmode | ALL_ATX_RESET, hcd->regs + HC_HW_MODE_CTRL);
	mdelay(10);
	isp1760_writel(hwmode, hcd->regs + HC_HW_MODE_CTRL);

	isp1760_writel(INTERRUPT_ENABLE_MASK, hcd->regs + HC_INTERRUPT_REG);
	isp1760_writel(INTERRUPT_ENABLE_MASK, hcd->regs + HC_INTERRUPT_ENABLE);

	/*
	 * PORT 1 Control register of the ISP1760 is the OTG control
	 * register on ISP1761.
	 */
	if (!(priv->devflags & ISP1760_FLAG_ISP1761) &&
	    !(priv->devflags & ISP1760_FLAG_PORT1_DIS)) {
		isp1760_writel(PORT1_POWER | PORT1_INIT2,
			       hcd->regs + HC_PORT1_CTRL);
		mdelay(10);
	}

	priv->hcs_params = isp1760_readl(hcd->regs + HC_HCSPARAMS);

	return priv_init(hcd);
}

static void isp1760_init_maps(struct usb_hcd *hcd)
{
	/*set last maps, for iso its only 1, else 32 tds bitmap*/
	isp1760_writel(0x80000000, hcd->regs + HC_ATL_PTD_LASTPTD_REG);
	isp1760_writel(0x80000000, hcd->regs + HC_INT_PTD_LASTPTD_REG);
	isp1760_writel(0x00000001, hcd->regs + HC_ISO_PTD_LASTPTD_REG);
}

static void isp1760_enable_interrupts(struct usb_hcd *hcd)
{
	isp1760_writel(0, hcd->regs + HC_ATL_IRQ_MASK_AND_REG);
	isp1760_writel(0, hcd->regs + HC_ATL_IRQ_MASK_OR_REG);
	isp1760_writel(0, hcd->regs + HC_INT_IRQ_MASK_AND_REG);
	isp1760_writel(0, hcd->regs + HC_INT_IRQ_MASK_OR_REG);
	isp1760_writel(0, hcd->regs + HC_ISO_IRQ_MASK_AND_REG);
	isp1760_writel(0xffffffff, hcd->regs + HC_ISO_IRQ_MASK_OR_REG);
	/* step 23 passed */
}

static int isp1760_run(struct usb_hcd *hcd)
{
	struct isp1760_hcd *priv = hcd_to_priv(hcd);
	int retval;
	u32 temp;
	u32 command;
	u32 chipid;

	hcd->uses_new_polling = 1;
	hcd->poll_rh = 0;

	hcd->state = HC_STATE_RUNNING;
	isp1760_enable_interrupts(hcd);
	temp = isp1760_readl(hcd->regs + HC_HW_MODE_CTRL);
	isp1760_writel(temp | HW_GLOBAL_INTR_EN, hcd->regs + HC_HW_MODE_CTRL);

	command = isp1760_readl(hcd->regs + HC_USBCMD);
	command &= ~(CMD_LRESET|CMD_RESET);
	command |= CMD_RUN;
	isp1760_writel(command, hcd->regs + HC_USBCMD);

	retval = handshake(priv, hcd->regs + 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);
	isp1760_writel(FLAG_CF, hcd->regs + HC_CONFIGFLAG);

	retval = handshake(priv, hcd->regs + HC_CONFIGFLAG, FLAG_CF, FLAG_CF,
			250 * 1000);
	up_write(&ehci_cf_port_reset_rwsem);
	if (retval)
		return retval;

	chipid = isp1760_readl(hcd->regs + HC_CHIP_ID_REG);
	isp1760_info(priv, "USB ISP %04x HW rev. %d started\n",	chipid & 0xffff,
			chipid >> 16);

	/* PTD Register Init Part 2, Step 28 */
	/* enable INTs */
	isp1760_init_maps(hcd);

	/* 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 u32 base_to_chip(u32 base)
{
	return ((base - 0x400) >> 3);
}

static void transform_into_atl(struct isp1760_hcd *priv, struct isp1760_qh *qh,
			struct isp1760_qtd *qtd, struct urb *urb,
			u32 payload, struct ptd *ptd)
{
	u32 dw0;
	u32 dw1;
	u32 dw2;
	u32 dw3;
	u32 maxpacket;
	u32 multi;
	u32 pid_code;
	u32 rl = RL_COUNTER;
	u32 nak = NAK_COUNTER;

	/* according to 3.6.2, max packet len can not be > 0x400 */
	maxpacket = usb_maxpacket(urb->dev, urb->pipe, usb_pipeout(urb->pipe));
	multi =  1 + ((maxpacket >> 11) & 0x3);
	maxpacket &= 0x7ff;

	/* DW0 */
	dw0 = PTD_VALID;
	dw0 |= PTD_LENGTH(qtd->length);
	dw0 |= PTD_MAXPACKET(maxpacket);
	dw0 |= PTD_ENDPOINT(usb_pipeendpoint(urb->pipe));
	dw1 = usb_pipeendpoint(urb->pipe) >> 1;

	/* DW1 */
	dw1 |= PTD_DEVICE_ADDR(usb_pipedevice(urb->pipe));

	pid_code = qtd->packet_type;
	dw1 |= PTD_PID_TOKEN(pid_code);

	if (usb_pipebulk(urb->pipe))
		dw1 |= PTD_TRANS_BULK;
	else if  (usb_pipeint(urb->pipe))
		dw1 |= PTD_TRANS_INT;

	if (urb->dev->speed != USB_SPEED_HIGH) {
		/* split transaction */

		dw1 |= PTD_TRANS_SPLIT;
		if (urb->dev->speed == USB_SPEED_LOW)
			dw1 |= PTD_SE_USB_LOSPEED;

		dw1 |= PTD_PORT_NUM(urb->dev->ttport);
		dw1 |= PTD_HUB_NUM(urb->dev->tt->hub->devnum);

		/* SE bit for Split INT transfers */
		if (usb_pipeint(urb->pipe) &&
				(urb->dev->speed == USB_SPEED_LOW))
			dw1 |= 2 << 16;

		dw3 = 0;
		rl = 0;
		nak = 0;
	} else {
		dw0 |= PTD_MULTI(multi);
		if (usb_pipecontrol(urb->pipe) || usb_pipebulk(urb->pipe))
			dw3 = qh->ping;
		else
			dw3 = 0;
	}
	/* DW2 */
	dw2 = 0;
	dw2 |= PTD_DATA_START_ADDR(base_to_chip(payload));
	dw2 |= PTD_RL_CNT(rl);
	dw3 |= PTD_NAC_CNT(nak);

	/* DW3 */
	if (usb_pipecontrol(urb->pipe))
		dw3 |= PTD_DATA_TOGGLE(qtd->toggle);
	else
		dw3 |= qh->toggle;


	dw3 |= PTD_ACTIVE;
	/* Cerr */
	dw3 |= PTD_CERR(ERR_COUNTER);

	memset(ptd, 0, sizeof(*ptd));

	ptd->dw0 = cpu_to_le32(dw0);
	ptd->dw1 = cpu_to_le32(dw1);
	ptd->dw2 = cpu_to_le32(dw2);
	ptd->dw3 = cpu_to_le32(dw3);
}

static void transform_add_int(struct isp1760_hcd *priv, struct isp1760_qh *qh,
			struct isp1760_qtd *qtd, struct urb *urb,
			u32 payload, struct ptd *ptd)
{
	u32 maxpacket;
	u32 multi;
	u32 numberofusofs;
	u32 i;
	u32 usofmask, usof;
	u32 period;

	maxpacket = usb_maxpacket(urb->dev, urb->pipe, usb_pipeout(urb->pipe));
	multi =  1 + ((maxpacket >> 11) & 0x3);
	maxpacket &= 0x7ff;
	/* length of the data per uframe */
	maxpacket = multi * maxpacket;

	numberofusofs = urb->transfer_buffer_length / maxpacket;
	if (urb->transfer_buffer_length % maxpacket)
		numberofusofs += 1;

	usofmask = 1;
	usof = 0;
	for (i = 0; i < numberofusofs; i++) {
		usof |= usofmask;
		usofmask <<= 1;
	}

	if (urb->dev->speed != USB_SPEED_HIGH) {
		/* split */
		ptd->dw5 = __constant_cpu_to_le32(0x1c);

		if (qh->period >= 32)
			period = qh->period / 2;
		else
			period = qh->period;

	} else {

		if (qh->period >= 8)
			period = qh->period/8;
		else
			period = qh->period;

		if (period >= 32)
			period  = 16;

		if (qh->period >= 8) {
			/* millisecond period */
			period = (period << 3);
		} else {
			/* usof based tranmsfers */
			/* minimum 4 usofs */
			usof = 0x11;
		}
	}

	ptd->dw2 |= cpu_to_le32(period);
	ptd->dw4 = cpu_to_le32(usof);
}

static void transform_into_int(struct isp1760_hcd *priv, struct isp1760_qh *qh,
			struct isp1760_qtd *qtd, struct urb *urb,
			u32 payload, struct ptd *ptd)
{
	transform_into_atl(priv, qh, qtd, urb, payload, ptd);
	transform_add_int(priv, qh, qtd, urb,  payload, ptd);
}

static int qtd_fill(struct isp1760_qtd *qtd, void *databuffer, size_t len,
		u32 token)
{
	int count;

	qtd->data_buffer = databuffer;
	qtd->packet_type = GET_QTD_TOKEN_TYPE(token);
	qtd->toggle = GET_DATA_TOGGLE(token);

	if (len > HC_ATL_PL_SIZE)
		count = HC_ATL_PL_SIZE;
	else
		count = len;

	qtd->length = count;
	return count;
}

static int check_error(struct ptd *ptd)
{
	int error = 0;
	u32 dw3;

	dw3 = le32_to_cpu(ptd->dw3);
	if (dw3 & DW3_HALT_BIT)
		error = -EPIPE;

	if (dw3 & DW3_ERROR_BIT) {
		printk(KERN_ERR "error bit is set in DW3\n");
		error = -EPIPE;
	}

	if (dw3 & DW3_QTD_ACTIVE) {
		printk(KERN_ERR "transfer active bit is set DW3\n");
		printk(KERN_ERR "nak counter: %d, rl: %d\n", (dw3 >> 19) & 0xf,
				(le32_to_cpu(ptd->dw2) >> 25) & 0xf);
	}

	return error;
}

static void check_int_err_status(u32 dw4)
{
	u32 i;

	dw4 >>= 8;

	for (i = 0; i < 8; i++) {
		switch (dw4 & 0x7) {
		case INT_UNDERRUN:
			printk(KERN_ERR "ERROR: under run , %d\n", i);
			break;

		case INT_EXACT:
			printk(KERN_ERR "ERROR: transaction error, %d\n", i);
			break;

		case INT_BABBLE:
			printk(KERN_ERR "ERROR: babble error, %d\n", i);
			break;
		}
		dw4 >>= 3;
	}
}

static void enqueue_one_qtd(struct isp1760_qtd *qtd, struct isp1760_hcd *priv,
		u32 payload)
{
	u32 token;
	struct usb_hcd *hcd = priv_to_hcd(priv);

	token = qtd->packet_type;

	if (qtd->length && (qtd->length <= HC_ATL_PL_SIZE)) {
		switch (token) {
		case IN_PID:
			break;
		case OUT_PID:
		case SETUP_PID:
			priv_write_copy(priv, qtd->data_buffer,
					hcd->regs + payload,
					qtd->length);
		}
	}
}

static void enqueue_one_atl_qtd(u32 atl_regs, u32 payload,
		struct isp1760_hcd *priv, struct isp1760_qh *qh,
		struct urb *urb, u32 slot, struct isp1760_qtd *qtd)
{
	struct ptd ptd;
	struct usb_hcd *hcd = priv_to_hcd(priv);

	transform_into_atl(priv, qh, qtd, urb, payload, &ptd);
	priv_write_copy(priv, (u32 *)&ptd, hcd->regs + atl_regs, sizeof(ptd));
	enqueue_one_qtd(qtd, priv, payload);

	priv->atl_ints[slot].urb = urb;
	priv->atl_ints[slot].qh = qh;
	priv->atl_ints[slot].qtd = qtd;
	priv->atl_ints[slot].data_buffer = qtd->data_buffer;
	priv->atl_ints[slot].payload = payload;
	qtd->status |= URB_ENQUEUED | URB_TYPE_ATL;
	qtd->status |= slot << 16;
}

static void enqueue_one_int_qtd(u32 int_regs, u32 payload,
		struct isp1760_hcd *priv, struct isp1760_qh *qh,
		struct urb *urb, u32 slot,  struct isp1760_qtd *qtd)
{
	struct ptd ptd;
	struct usb_hcd *hcd = priv_to_hcd(priv);

	transform_into_int(priv, qh, qtd, urb, payload, &ptd);
	priv_write_copy(priv, (u32 *)&ptd, hcd->regs + int_regs, sizeof(ptd));
	enqueue_one_qtd(qtd, priv, payload);

	priv->int_ints[slot].urb = urb;
	priv->int_ints[slot].qh = qh;
	priv->int_ints[slot].qtd = qtd;
	priv->int_ints[slot].data_buffer = qtd->data_buffer;
	priv->int_ints[slot].payload = payload;
	qtd->status |= URB_ENQUEUED | URB_TYPE_INT;
	qtd->status |= slot << 16;
}

static void enqueue_an_ATL_packet(struct usb_hcd *hcd, struct isp1760_qh *qh,
				  struct isp1760_qtd *qtd)
{
	struct isp1760_hcd *priv = hcd_to_priv(hcd);
	u32 skip_map, or_map;
	u32 queue_entry;
	u32 slot;
	u32 atl_regs, payload;
	u32 buffstatus;

	skip_map = isp1760_readl(hcd->regs + HC_ATL_PTD_SKIPMAP_REG);

	BUG_ON(!skip_map);
	slot = __ffs(skip_map);
	queue_entry = 1 << slot;

	atl_regs = ATL_REGS_OFFSET + slot * sizeof(struct ptd);

	payload = alloc_mem(priv, qtd->length);

	enqueue_one_atl_qtd(atl_regs, payload, priv, qh, qtd->urb, slot, qtd);

	or_map = isp1760_readl(hcd->regs + HC_ATL_IRQ_MASK_OR_REG);
	or_map |= queue_entry;
	isp1760_writel(or_map, hcd->regs + HC_ATL_IRQ_MASK_OR_REG);

	skip_map &= ~queue_entry;
	isp1760_writel(skip_map, hcd->regs + HC_ATL_PTD_SKIPMAP_REG);

	buffstatus = isp1760_readl(hcd->regs + HC_BUFFER_STATUS_REG);
	buffstatus |= ATL_BUFFER;
	isp1760_writel(buffstatus, hcd->regs + HC_BUFFER_STATUS_REG);
}

static void enqueue_an_INT_packet(struct usb_hcd *hcd, struct isp1760_qh *qh,
				  struct isp1760_qtd *qtd)
{
	struct isp1760_hcd *priv = hcd_to_priv(hcd);
	u32 skip_map, or_map;
	u32 queue_entry;
	u32 slot;
	u32 int_regs, payload;
	u32 buffstatus;

	skip_map = isp1760_readl(hcd->regs + HC_INT_PTD_SKIPMAP_REG);

	BUG_ON(!skip_map);
	slot = __ffs(skip_map);
	queue_entry = 1 << slot;

	int_regs = INT_REGS_OFFSET + slot * sizeof(struct ptd);

	payload = alloc_mem(priv, qtd->length);

	enqueue_one_int_qtd(int_regs, payload, priv, qh, qtd->urb, slot, qtd);

	or_map = isp1760_readl(hcd->regs + HC_INT_IRQ_MASK_OR_REG);
	or_map |= queue_entry;
	isp1760_writel(or_map, hcd->regs + HC_INT_IRQ_MASK_OR_REG);

	skip_map &= ~queue_entry;
	isp1760_writel(skip_map, hcd->regs + HC_INT_PTD_SKIPMAP_REG);

	buffstatus = isp1760_readl(hcd->regs + HC_BUFFER_STATUS_REG);
	buffstatus |= INT_BUFFER;
	isp1760_writel(buffstatus, hcd->regs + HC_BUFFER_STATUS_REG);
}

static void isp1760_urb_done(struct isp1760_hcd *priv, struct urb *urb, int status)
__releases(priv->lock)
__acquires(priv->lock)
{
	if (!urb->unlinked) {
		if (status == -EINPROGRESS)
			status = 0;
	}

	/* complete() can reenter this HCD */
	usb_hcd_unlink_urb_from_ep(priv_to_hcd(priv), urb);
	spin_unlock(&priv->lock);
	usb_hcd_giveback_urb(priv_to_hcd(priv), urb, status);
	spin_lock(&priv->lock);
}

static void isp1760_qtd_free(struct isp1760_qtd *qtd)
{
	kmem_cache_free(qtd_cachep, qtd);
}

static struct isp1760_qtd *clean_this_qtd(struct isp1760_qtd *qtd)
{
	struct isp1760_qtd *tmp_qtd;

	tmp_qtd = qtd->hw_next;
	list_del(&qtd->qtd_list);
	isp1760_qtd_free(qtd);
	return tmp_qtd;
}

/*
 * Remove this QTD from the QH list and free its memory. If this QTD
 * isn't the last one than remove also his successor(s).
 * Returns the QTD which is part of an new URB and should be enqueued.
 */
static struct isp1760_qtd *clean_up_qtdlist(struct isp1760_qtd *qtd)
{
	struct isp1760_qtd *tmp_qtd;
	int last_one;

	do {
		tmp_qtd = qtd->hw_next;
		last_one = qtd->status & URB_COMPLETE_NOTIFY;
		list_del(&qtd->qtd_list);
		isp1760_qtd_free(qtd);
		qtd = tmp_qtd;
	} while (!last_one && qtd);

	return qtd;
}

static void do_atl_int(struct usb_hcd *usb_hcd)
{
	struct isp1760_hcd *priv = hcd_to_priv(usb_hcd);
	u32 done_map, skip_map;
	struct ptd ptd;
	struct urb *urb = NULL;
	u32 atl_regs_base;
	u32 atl_regs;
	u32 queue_entry;
	u32 payload;
	u32 length;
	u32 or_map;
	u32 status = -EINVAL;
	int error;
	struct isp1760_qtd *qtd;
	struct isp1760_qh *qh;
	u32 rl;
	u32 nakcount;

	done_map = isp1760_readl(usb_hcd->regs +
			HC_ATL_PTD_DONEMAP_REG);
	skip_map = isp1760_readl(usb_hcd->regs +
			HC_ATL_PTD_SKIPMAP_REG);

	or_map = isp1760_readl(usb_hcd->regs + HC_ATL_IRQ_MASK_OR_REG);
	or_map &= ~done_map;
	isp1760_writel(or_map, usb_hcd->regs + HC_ATL_IRQ_MASK_OR_REG);

	atl_regs_base = ATL_REGS_OFFSET;
	while (done_map) {
		u32 dw1;
		u32 dw2;
		u32 dw3;

		status = 0;

		queue_entry = __ffs(done_map);
		done_map &= ~(1 << queue_entry);
		skip_map |= 1 << queue_entry;

		atl_regs = atl_regs_base + queue_entry * sizeof(struct ptd);

		urb = priv->atl_ints[queue_entry].urb;
		qtd = priv->atl_ints[queue_entry].qtd;
		qh = priv->atl_ints[queue_entry].qh;
		payload = priv->atl_ints[queue_entry].payload;

		if (!qh) {
			printk(KERN_ERR "qh is 0\n");
			continue;
		}
		isp1760_writel(atl_regs + ISP_BANK(0), usb_hcd->regs +
				HC_MEMORY_REG);
		isp1760_writel(payload  + ISP_BANK(1), usb_hcd->regs +
				HC_MEMORY_REG);
		/*
		 * write bank1 address twice to ensure the 90ns delay (time
		 * between BANK0 write and the priv_read_copy() call is at
		 * least 3*t_WHWL + 2*t_w11 = 3*25ns + 2*17ns = 109ns)
		 */
		isp1760_writel(payload  + ISP_BANK(1), usb_hcd->regs +
				HC_MEMORY_REG);

		priv_read_copy(priv, (u32 *)&ptd, usb_hcd->regs + atl_regs +
				ISP_BANK(0), sizeof(ptd));

		dw1 = le32_to_cpu(ptd.dw1);
		dw2 = le32_to_cpu(ptd.dw2);
		dw3 = le32_to_cpu(ptd.dw3);
		rl = (dw2 >> 25) & 0x0f;
		nakcount = (dw3 >> 19) & 0xf;

		/* Transfer Error, *but* active and no HALT -> reload */
		if ((dw3 & DW3_ERROR_BIT) && (dw3 & DW3_QTD_ACTIVE) &&
				!(dw3 & DW3_HALT_BIT)) {

			/* according to ppriv code, we have to
			 * reload this one if trasfered bytes != requested bytes
			 * else act like everything went smooth..
			 * XXX This just doesn't feel right and hasn't
			 * triggered so far.
			 */

			length = PTD_XFERRED_LENGTH(dw3);
			printk(KERN_ERR "Should reload now.... transfered %d "
					"of %zu\n", length, qtd->length);
			BUG();
		}

		if (!nakcount && (dw3 & DW3_QTD_ACTIVE)) {
			u32 buffstatus;

			/* XXX
			 * NAKs are handled in HW by the chip. Usually if the
			 * device is not able to send data fast enough.
			 * This did not trigger for a long time now.
			 */
			printk(KERN_ERR "Reloading ptd %p/%p... qh %p readed: "
					"%d of %zu done: %08x cur: %08x\n", qtd,
					urb, qh, PTD_XFERRED_LENGTH(dw3),
					qtd->length, done_map,
					(1 << queue_entry));

			/* RL counter = ERR counter */
			dw3 &= ~(0xf << 19);
			dw3 |= rl << 19;
			dw3 &= ~(3 << (55 - 32));
			dw3 |= ERR_COUNTER << (55 - 32);

			/*
			 * It is not needed to write skip map back because it
			 * is unchanged. Just make sure that this entry is
			 * unskipped once it gets written to the HW.
			 */
			skip_map &= ~(1 << queue_entry);
			or_map = isp1760_readl(usb_hcd->regs +
					HC_ATL_IRQ_MASK_OR_REG);
			or_map |= 1 << queue_entry;
			isp1760_writel(or_map, usb_hcd->regs +
					HC_ATL_IRQ_MASK_OR_REG);

			ptd.dw3 = cpu_to_le32(dw3);
			priv_write_copy(priv, (u32 *)&ptd, usb_hcd->regs +
					atl_regs, sizeof(ptd));

			ptd.dw0 |= __constant_cpu_to_le32(PTD_VALID);
			priv_write_copy(priv, (u32 *)&ptd, usb_hcd->regs +
					atl_regs, sizeof(ptd));

			buffstatus = isp1760_readl(usb_hcd->regs +
					HC_BUFFER_STATUS_REG);
			buffstatus |= ATL_BUFFER;
			isp1760_writel(buffstatus, usb_hcd->regs +
					HC_BUFFER_STATUS_REG);
			continue;
		}

		error = check_error(&ptd);
		if (error) {
			status = error;
			priv->atl_ints[queue_entry].qh->toggle = 0;
			priv->atl_ints[queue_entry].qh->ping = 0;
			urb->status = -EPIPE;

#if 0
			printk(KERN_ERR "Error in %s().\n", __func__);
			printk(KERN_ERR "IN dw0: %08x dw1: %08x dw2: %08x "
					"dw3: %08x dw4: %08x dw5: %08x dw6: "
					"%08x dw7: %08x\n",
					ptd.dw0, ptd.dw1, ptd.dw2, ptd.dw3,
					ptd.dw4, ptd.dw5, ptd.dw6, ptd.dw7);
#endif
		} else {
			if (usb_pipetype(urb->pipe) == PIPE_BULK) {
				priv->atl_ints[queue_entry].qh->toggle = dw3 &
					(1 << 25);
				priv->atl_ints[queue_entry].qh->ping = dw3 &
					(1 << 26);
			}
		}

		length = PTD_XFERRED_LENGTH(dw3);
		if (length) {
			switch (DW1_GET_PID(dw1)) {
			case IN_PID:
				priv_read_copy(priv,
					priv->atl_ints[queue_entry].data_buffer,
					usb_hcd->regs + payload + ISP_BANK(1),
					length);

			case OUT_PID:

				urb->actual_length += length;

			case SETUP_PID:
				break;
			}
		}

		priv->atl_ints[queue_entry].data_buffer = NULL;
		priv->atl_ints[queue_entry].urb = NULL;
		priv->atl_ints[queue_entry].qtd = NULL;
		priv->atl_ints[queue_entry].qh = NULL;

		free_mem(priv, payload);

		isp1760_writel(skip_map, usb_hcd->regs +
				HC_ATL_PTD_SKIPMAP_REG);

		if (urb->status == -EPIPE) {
			/* HALT was received */

			qtd = clean_up_qtdlist(qtd);
			isp1760_urb_done(priv, urb, urb->status);

		} else if (usb_pipebulk(urb->pipe) && (length < qtd->length)) {
			/* short BULK received */

			if (urb->transfer_flags & URB_SHORT_NOT_OK) {
				urb->status = -EREMOTEIO;
				isp1760_dbg(priv, "short bulk, %d instead %zu "
					"with URB_SHORT_NOT_OK flag.\n",
					length, qtd->length);
			}

			if (urb->status == -EINPROGRESS)
				urb->status = 0;

			qtd = clean_up_qtdlist(qtd);

			isp1760_urb_done(priv, urb, urb->status);

		} else if (qtd->status & URB_COMPLETE_NOTIFY) {
			/* that was the last qtd of that URB */

			if (urb->status == -EINPROGRESS)
				urb->status = 0;

			qtd = clean_this_qtd(qtd);
			isp1760_urb_done(priv, urb, urb->status);

		} else {
			/* next QTD of this URB */

			qtd = clean_this_qtd(qtd);
			BUG_ON(!qtd);
		}

		if (qtd)
			enqueue_an_ATL_packet(usb_hcd, qh, qtd);

		skip_map = isp1760_readl(usb_hcd->regs +
				HC_ATL_PTD_SKIPMAP_REG);
	}
}

static void do_intl_int(struct usb_hcd *usb_hcd)
{
	struct isp1760_hcd *priv = hcd_to_priv(usb_hcd);
	u32 done_map, skip_map;
	struct ptd ptd;
	struct urb *urb = NULL;
	u32 int_regs;
	u32 int_regs_base;
	u32 payload;
	u32 length;
	u32 or_map;
	int error;
	u32 queue_entry;
	struct isp1760_qtd *qtd;
	struct isp1760_qh *qh;

	done_map = isp1760_readl(usb_hcd->regs +
			HC_INT_PTD_DONEMAP_REG);
	skip_map = isp1760_readl(usb_hcd->regs +
			HC_INT_PTD_SKIPMAP_REG);

	or_map = isp1760_readl(usb_hcd->regs + HC_INT_IRQ_MASK_OR_REG);
	or_map &= ~done_map;
	isp1760_writel(or_map, usb_hcd->regs + HC_INT_IRQ_MASK_OR_REG);

	int_regs_base = INT_REGS_OFFSET;

	while (done_map) {
		u32 dw1;
		u32 dw3;

		queue_entry = __ffs(done_map);
		done_map &= ~(1 << queue_entry);
		skip_map |= 1 << queue_entry;

		int_regs = int_regs_base + queue_entry * sizeof(struct ptd);
		urb = priv->int_ints[queue_entry].urb;
		qtd = priv->int_ints[queue_entry].qtd;
		qh = priv->int_ints[queue_entry].qh;
		payload = priv->int_ints[queue_entry].payload;

		if (!qh) {
			printk(KERN_ERR "(INT) qh is 0\n");
			continue;
		}

		isp1760_writel(int_regs + ISP_BANK(0), usb_hcd->regs +
				HC_MEMORY_REG);
		isp1760_writel(payload  + ISP_BANK(1), usb_hcd->regs +
				HC_MEMORY_REG);
		/*
		 * write bank1 address twice to ensure the 90ns delay (time
		 * between BANK0 write and the priv_read_copy() call is at
		 * least 3*t_WHWL + 2*t_w11 = 3*25ns + 2*17ns = 92ns)
		 */
		isp1760_writel(payload  + ISP_BANK(1), usb_hcd->regs +
				HC_MEMORY_REG);

		priv_read_copy(priv, (u32 *)&ptd, usb_hcd->regs + int_regs +
				ISP_BANK(0), sizeof(ptd));
		dw1 = le32_to_cpu(ptd.dw1);
		dw3 = le32_to_cpu(ptd.dw3);
		check_int_err_status(le32_to_cpu(ptd.dw4));

		error = check_error(&ptd);
		if (error) {
#if 0
			printk(KERN_ERR "Error in %s().\n", __func__);
			printk(KERN_ERR "IN dw0: %08x dw1: %08x dw2: %08x "
					"dw3: %08x dw4: %08x dw5: %08x dw6: "
					"%08x dw7: %08x\n",
					ptd.dw0, ptd.dw1, ptd.dw2, ptd.dw3,
					ptd.dw4, ptd.dw5, ptd.dw6, ptd.dw7);
#endif
			urb->status = -EPIPE;
			priv->int_ints[queue_entry].qh->toggle = 0;
			priv->int_ints[queue_entry].qh->ping = 0;

		} else {
			priv->int_ints[queue_entry].qh->toggle =
				dw3 & (1 << 25);
			priv->int_ints[queue_entry].qh->ping = dw3 & (1 << 26);
		}

		if (urb->dev->speed != USB_SPEED_HIGH)
			length = PTD_XFERRED_LENGTH_LO(dw3);
		else
			length = PTD_XFERRED_LENGTH(dw3);

		if (length) {
			switch (DW1_GET_PID(dw1)) {
			case IN_PID:
				priv_read_copy(priv,
					priv->int_ints[queue_entry].data_buffer,
					usb_hcd->regs + payload + ISP_BANK(1),
					length);
			case OUT_PID:

				urb->actual_length += length;

			case SETUP_PID:
				break;
			}
		}

		priv->int_ints[queue_entry].data_buffer = NULL;
		priv->int_ints[queue_entry].urb = NULL;
		priv->int_ints[queue_entry].qtd = NULL;
		priv->int_ints[queue_entry].qh = NULL;

		isp1760_writel(skip_map, usb_hcd->regs +
				HC_INT_PTD_SKIPMAP_REG);
		free_mem(priv, payload);

		if (urb->status == -EPIPE) {
			/* HALT received */

			 qtd = clean_up_qtdlist(qtd);
			 isp1760_urb_done(priv, urb, urb->status);

		} else if (qtd->status & URB_COMPLETE_NOTIFY) {

			if (urb->status == -EINPROGRESS)
				urb->status = 0;

			qtd = clean_this_qtd(qtd);
			isp1760_urb_done(priv, urb, urb->status);

		} else {
			/* next QTD of this URB */

			qtd = clean_this_qtd(qtd);
			BUG_ON(!qtd);
		}

		if (qtd)
			enqueue_an_INT_packet(usb_hcd, qh, qtd);

		skip_map = isp1760_readl(usb_hcd->regs +
				HC_INT_PTD_SKIPMAP_REG);
	}
}

#define max_packet(wMaxPacketSize) ((wMaxPacketSize) & 0x07ff)
static struct isp1760_qh *qh_make(struct isp1760_hcd *priv, struct urb *urb,
		gfp_t flags)
{
	struct isp1760_qh *qh;
	int is_input, type;

	qh = isp1760_qh_alloc(priv, flags);
	if (!qh)
		return qh;

	/*
	 * init endpoint/device data for this QH
	 */
	is_input = usb_pipein(urb->pipe);
	type = usb_pipetype(urb->pipe);

	if (type == PIPE_INTERRUPT) {

		if (urb->dev->speed == USB_SPEED_HIGH) {

			qh->period = urb->interval >> 3;
			if (qh->period == 0 && urb->interval != 1) {
				/* NOTE interval 2 or 4 uframes could work.
				 * But interval 1 scheduling is simpler, and
				 * includes high bandwidth.
				 */
				printk(KERN_ERR "intr period %d uframes, NYET!",
						urb->interval);
				qh_destroy(qh);
				return NULL;
			}
		} else {
			qh->period = urb->interval;
		}
	}

	/* support for tt scheduling, and access to toggles */
	qh->dev = urb->dev;

	if (!usb_pipecontrol(urb->pipe))
		usb_settoggle(urb->dev, usb_pipeendpoint(urb->pipe), !is_input,
				1);
	return qh;
}

/*
 * For control/bulk/interrupt, return QH with these TDs appended.
 * Allocates and initializes the QH if necessary.
 * Returns null if it can't allocate a QH it needs to.
 * If the QH has TDs (urbs) already, that's great.
 */
static struct isp1760_qh *qh_append_tds(struct isp1760_hcd *priv,
		struct urb *urb, struct list_head *qtd_list, int epnum,
		void **ptr)
{
	struct isp1760_qh *qh;
	struct isp1760_qtd *qtd;
	struct isp1760_qtd *prev_qtd;

	qh = (struct isp1760_qh *)*ptr;
	if (!qh) {
		/* can't sleep here, we have priv->lock... */
		qh = qh_make(priv, urb, GFP_ATOMIC);
		if (!qh)
			return qh;
		*ptr = qh;
	}

	qtd = list_entry(qtd_list->next, struct isp1760_qtd,
			qtd_list);
	if (!list_empty(&qh->qtd_list))
		prev_qtd = list_entry(qh->qtd_list.prev,
				struct isp1760_qtd, qtd_list);
	else
		prev_qtd = NULL;

	list_splice(qtd_list, qh->qtd_list.prev);
	if (prev_qtd) {
		BUG_ON(prev_qtd->hw_next);
		prev_qtd->hw_next = qtd;
	}

	urb->hcpriv = qh;
	return qh;
}

static void qtd_list_free(struct isp1760_hcd *priv, struct urb *urb,
		struct list_head *qtd_list)
{
	struct list_head *entry, *temp;

	list_for_each_safe(entry, temp, qtd_list) {
		struct isp1760_qtd	*qtd;

		qtd = list_entry(entry, struct isp1760_qtd, qtd_list);
		list_del(&qtd->qtd_list);
		isp1760_qtd_free(qtd);
	}
}

static int isp1760_prepare_enqueue(struct isp1760_hcd *priv, struct urb *urb,
		struct list_head *qtd_list, gfp_t mem_flags, packet_enqueue *p)
{
	struct isp1760_qtd         *qtd;
	int                     epnum;
	unsigned long           flags;
	struct isp1760_qh          *qh = NULL;
	int                     rc;
	int qh_busy;

	qtd = list_entry(qtd_list->next, struct isp1760_qtd, qtd_list);
	epnum = urb->ep->desc.bEndpointAddress;

	spin_lock_irqsave(&priv->lock, flags);
	if (!test_bit(HCD_FLAG_HW_ACCESSIBLE, &priv_to_hcd(priv)->flags)) {
		rc = -ESHUTDOWN;
		goto done;
	}
	rc = usb_hcd_link_urb_to_ep(priv_to_hcd(priv), urb);
	if (rc)
		goto done;

	qh = urb->ep->hcpriv;
	if (qh)
		qh_busy = !list_empty(&qh->qtd_list);
	else
		qh_busy = 0;

	qh = qh_append_tds(priv, urb, qtd_list, epnum, &urb->ep->hcpriv);
	if (!qh) {
		usb_hcd_unlink_urb_from_ep(priv_to_hcd(priv), urb);
		rc = -ENOMEM;
		goto done;
	}

	if (!qh_busy)
		p(priv_to_hcd(priv), qh, qtd);

done:
	spin_unlock_irqrestore(&priv->lock, flags);
	if (!qh)
		qtd_list_free(priv, urb, qtd_list);
	return rc;
}

static struct isp1760_qtd *isp1760_qtd_alloc(struct isp1760_hcd *priv,
		gfp_t flags)
{
	struct isp1760_qtd *qtd;

	qtd = kmem_cache_zalloc(qtd_cachep, flags);
	if (qtd)
		INIT_LIST_HEAD(&qtd->qtd_list);

	return qtd;
}

/*
 * create a list of filled qtds for this URB; won't link into qh.
 */
static struct list_head *qh_urb_transaction(struct isp1760_hcd *priv,
		struct urb *urb, struct list_head *head, gfp_t flags)
{
	struct isp1760_qtd *qtd, *qtd_prev;
	void *buf;
	int len, maxpacket;
	int is_input;
	u32 token;

	/*
	 * URBs map to sequences of QTDs:  one logical transaction
	 */
	qtd = isp1760_qtd_alloc(priv, flags);
	if (!qtd)
		return NULL;

	list_add_tail(&qtd->qtd_list, head);
	qtd->urb = urb;
	urb->status = -EINPROGRESS;

	token = 0;
	/* for split transactions, SplitXState initialized to zero */

	len = urb->transfer_buffer_length;
	is_input = usb_pipein(urb->pipe);
	if (usb_pipecontrol(urb->pipe)) {
		/* SETUP pid */
		qtd_fill(qtd, urb->setup_packet,
				sizeof(struct usb_ctrlrequest),
				token | SETUP_PID);

		/* ... and always at least one more pid */
		token ^= DATA_TOGGLE;
		qtd_prev = qtd;
		qtd = isp1760_qtd_alloc(priv, flags);
		if (!qtd)
			goto cleanup;
		qtd->urb = urb;
		qtd_prev->hw_next = qtd;
		list_add_tail(&qtd->qtd_list, head);

		/* for zero length DATA stages, STATUS is always IN */
		if (len == 0)
			token |= IN_PID;
	}

	/*
	 * data transfer stage:  buffer setup
	 */
	buf = urb->transfer_buffer;

	if (is_input)
		token |= IN_PID;
	else
		token |= OUT_PID;

	maxpacket = max_packet(usb_maxpacket(urb->dev, urb->pipe, !is_input));

	/*
	 * buffer gets wrapped in one or more qtds;
	 * last one may be "short" (including zero len)
	 * and may serve as a control status ack
	 */
	for (;;) {
		int this_qtd_len;

		if (!buf && len) {
			/* XXX This looks like usb storage / SCSI bug */
			printk(KERN_ERR "buf is null, dma is %08lx len is %d\n",
					(long unsigned)urb->transfer_dma, len);
			WARN_ON(1);
		}

		this_qtd_len = qtd_fill(qtd, buf, len, token);
		len -= this_qtd_len;
		buf += this_qtd_len;

		/* qh makes control packets use qtd toggle; maybe switch it */
		if ((maxpacket & (this_qtd_len + (maxpacket - 1))) == 0)
			token ^= DATA_TOGGLE;

		if (len <= 0)
			break;

		qtd_prev = qtd;
		qtd = isp1760_qtd_alloc(priv, flags);
		if (!qtd)
			goto cleanup;
		qtd->urb = urb;
		qtd_prev->hw_next = qtd;
		list_add_tail(&qtd->qtd_list, head);
	}

	/*
	 * 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;
			/* "in" <--> "out"  */
			token ^= IN_PID;
			/* force DATA1 */
			token |= DATA_TOGGLE;
		} else if (usb_pipebulk(urb->pipe)
				&& (urb->transfer_flags & URB_ZERO_PACKET)
				&& !(urb->transfer_buffer_length % maxpacket)) {
			one_more = 1;
		}
		if (one_more) {
			qtd_prev = qtd;
			qtd = isp1760_qtd_alloc(priv, flags);
			if (!qtd)
				goto cleanup;
			qtd->urb = urb;
			qtd_prev->hw_next = qtd;
			list_add_tail(&qtd->qtd_list, head);

			/* never any data in such packets */
			qtd_fill(qtd, NULL, 0, token);
		}
	}

	qtd->status = URB_COMPLETE_NOTIFY;
	return head;

cleanup:
	qtd_list_free(priv, urb, head);
	return NULL;
}

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 qtd_list;
	packet_enqueue *pe;

	INIT_LIST_HEAD(&qtd_list);

	switch (usb_pipetype(urb->pipe)) {
	case PIPE_CONTROL:
	case PIPE_BULK:

		if (!qh_urb_transaction(priv, urb, &qtd_list, mem_flags))
			return -ENOMEM;
		pe =  enqueue_an_ATL_packet;
		break;

	case PIPE_INTERRUPT:
		if (!qh_urb_transaction(priv, urb, &qtd_list, mem_flags))
			return -ENOMEM;
		pe = enqueue_an_INT_packet;
		break;

	case PIPE_ISOCHRONOUS:
		printk(KERN_ERR "PIPE_ISOCHRONOUS ain't supported\n");
	default:
		return -EPIPE;
	}

	return isp1760_prepare_enqueue(priv, urb, &qtd_list, mem_flags, pe);
}

static int isp1760_urb_dequeue(struct usb_hcd *hcd, struct urb *urb,
		int status)
{
	struct isp1760_hcd *priv = hcd_to_priv(hcd);
	struct inter_packet_info *ints;
	u32 i;
	u32 reg_base, or_reg, skip_reg;
	unsigned long flags;
	struct ptd ptd;

	switch (usb_pipetype(urb->pipe)) {
	case PIPE_ISOCHRONOUS:
		return -EPIPE;
		break;

	case PIPE_INTERRUPT:
		ints = priv->int_ints;
		reg_base = INT_REGS_OFFSET;
		or_reg = HC_INT_IRQ_MASK_OR_REG;
		skip_reg = HC_INT_PTD_SKIPMAP_REG;
		break;

	default:
		ints = priv->atl_ints;
		reg_base = ATL_REGS_OFFSET;
		or_reg = HC_ATL_IRQ_MASK_OR_REG;
		skip_reg = HC_ATL_PTD_SKIPMAP_REG;
		break;
	}

	memset(&ptd, 0, sizeof(ptd));
	spin_lock_irqsave(&priv->lock, flags);

	for (i = 0; i < 32; i++) {
		if (ints->urb == urb) {
			u32 skip_map;
			u32 or_map;
			struct isp1760_qtd *qtd;

			skip_map = isp1760_readl(hcd->regs + skip_reg);
			skip_map |= 1 << i;
			isp1760_writel(skip_map, hcd->regs + skip_reg);

			or_map = isp1760_readl(hcd->regs + or_reg);
			or_map &= ~(1 << i);
			isp1760_writel(or_map, hcd->regs + or_reg);

			priv_write_copy(priv, (u32 *)&ptd, hcd->regs + reg_base
					+ i * sizeof(ptd), sizeof(ptd));
			qtd = ints->qtd;

			clean_up_qtdlist(qtd);

			free_mem(priv, ints->payload);

			ints->urb = NULL;
			ints->qh = NULL;
			ints->qtd = NULL;
			ints->data_buffer = NULL;
			ints->payload = 0;

			isp1760_urb_done(priv, urb, status);
			break;
		}
		ints++;
	}

	spin_unlock_irqrestore(&priv->lock, flags);
	return 0;
}

static irqreturn_t isp1760_irq(struct usb_hcd *usb_hcd)
{
	struct isp1760_hcd *priv = hcd_to_priv(usb_hcd);
	u32 imask;
	irqreturn_t irqret = IRQ_NONE;

	spin_lock(&priv->lock);

	if (!(usb_hcd->state & HC_STATE_RUNNING))
		goto leave;

	imask = isp1760_readl(usb_hcd->regs + HC_INTERRUPT_REG);
	if (unlikely(!imask))
		goto leave;

	isp1760_writel(imask, usb_hcd->regs + HC_INTERRUPT_REG);
	if (imask & HC_ATL_INT)
		do_atl_int(usb_hcd);

	if (imask & HC_INTL_INT)
		do_intl_int(usb_hcd);

	irqret = IRQ_HANDLED;
leave:
	spin_unlock(&priv->lock);
	return irqret;
}

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 !USB_SUSPEND, 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 = isp1760_readl(hcd->regs + HC_PORTSC1);

	if (temp & PORT_OWNER) {
		if (temp & PORT_CSC) {
			temp &= ~PORT_CSC;
			isp1760_writel(temp, hcd->regs + HC_PORTSC1);
			goto done;
		}
	}

	/*
	 * Return status information even for ports with OWNER set.
	 * Otherwise khubd 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;

	/* two bitmaps:  ports removable, and usb 1.0 legacy PortPwrCtrlMask */
	memset(&desc->bitmap[0], 0, temp);
	memset(&desc->bitmap[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 isp1760_hcd *priv, int index,
		u32 __iomem *status_reg, 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)) {

		printk(KERN_ERR "port %d full speed --> companion\n",
			index + 1);

		port_status |= PORT_OWNER;
		port_status &= ~PORT_RWC_BITS;
		isp1760_writel(port_status, status_reg);

	} else
		printk(KERN_ERR "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 __iomem *status_reg = hcd->regs + HC_PORTSC1;
	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 = isp1760_readl(status_reg);

		/*
		 * Even if OWNER is set, so the port is owned by the
		 * companion controller, khubd needs to be able to clear
		 * the port-change status bits (especially
		 * USB_PORT_FEAT_C_CONNECTION).
		 */

		switch (wValue) {
		case USB_PORT_FEAT_ENABLE:
			isp1760_writel(temp & ~PORT_PE, status_reg);
			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);
				isp1760_writel(temp | PORT_RESUME,
						status_reg);
				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))
				isp1760_writel(temp & ~PORT_POWER, status_reg);
			break;
		case USB_PORT_FEAT_C_CONNECTION:
			isp1760_writel(temp | PORT_CSC,
					status_reg);
			break;
		case USB_PORT_FEAT_C_OVER_CURRENT:
			/* XXX error ?*/
			break;
		case USB_PORT_FEAT_C_RESET:
			/* GetPortStatus clears reset */
			break;
		default:
			goto error;
		}
		isp1760_readl(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 = isp1760_readl(status_reg);

		/* wPortChange bits */
		if (temp & PORT_CSC)
			status |= 1 << USB_PORT_FEAT_C_CONNECTION;


		/* whoever resumes must GetPortStatus to complete it!! */
		if (temp & PORT_RESUME) {
			printk(KERN_ERR "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(&priv_to_hcd(priv)->rh_timer,
						priv->reset_done);
			}

			/* resume completed? */
			else if (time_after_eq(jiffies,
					priv->reset_done)) {
				status |= 1 << USB_PORT_FEAT_C_SUSPEND;
				priv->reset_done = 0;

				/* stop resume signaling */
				temp = isp1760_readl(status_reg);
				isp1760_writel(
					temp & ~(PORT_RWC_BITS | PORT_RESUME),
					status_reg);
				retval = handshake(priv, status_reg,
					   PORT_RESUME, 0, 2000 /* 2msec */);
				if (retval != 0) {
					isp1760_err(priv,
						"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 |= 1 << USB_PORT_FEAT_C_RESET;
			priv->reset_done = 0;

			/* force reset to complete */
			isp1760_writel(temp & ~PORT_RESET,
					status_reg);
			/* REVISIT:  some hardware needs 550+ usec to clear
			 * this bit; seems too long to spin routinely...
			 */
			retval = handshake(priv, status_reg,
					PORT_RESET, 0, 750);
			if (retval != 0) {
				isp1760_err(priv, "port %d reset error %d\n",
						wIndex + 1, retval);
				goto error;
			}

			/* see what we found out */
			temp = check_reset_complete(priv, wIndex, status_reg,
					isp1760_readl(status_reg));
		}
		/*
		 * Even if OWNER is set, there's no harm letting khubd
		 * see the wPortStatus values (they should all be 0 except
		 * for PORT_POWER anyway).
		 */

		if (temp & PORT_OWNER)
			printk(KERN_ERR "Warning: PORT_OWNER is set\n");

		if (temp & PORT_CONNECT) {
			status |= 1 << USB_PORT_FEAT_CONNECTION;
			/* status may be from integrated TT */
			status |= ehci_port_speed(priv, temp);
		}
		if (temp & PORT_PE)
			status |= 1 << USB_PORT_FEAT_ENABLE;
		if (temp & (PORT_SUSPEND|PORT_RESUME))
			status |= 1 << USB_PORT_FEAT_SUSPEND;
		if (temp & PORT_RESET)
			status |= 1 << USB_PORT_FEAT_RESET;
		if (temp & PORT_POWER)
			status |= 1 << USB_PORT_FEAT_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 = isp1760_readl(status_reg);
		if (temp & PORT_OWNER)
			break;

/*		temp &= ~PORT_RWC_BITS; */
		switch (wValue) {
		case USB_PORT_FEAT_ENABLE:
			isp1760_writel(temp | PORT_PE, status_reg);
			break;

		case USB_PORT_FEAT_SUSPEND:
			if ((temp & PORT_PE) == 0
					|| (temp & PORT_RESET) != 0)
				goto error;

			isp1760_writel(temp | PORT_SUSPEND, status_reg);
			break;
		case USB_PORT_FEAT_POWER:
			if (HCS_PPC(priv->hcs_params))
				isp1760_writel(temp | PORT_POWER,
						status_reg);
			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);
			}
			isp1760_writel(temp, status_reg);
			break;
		default:
			goto error;
		}
		isp1760_readl(hcd->regs + HC_USBCMD);
		break;

	default:
error:
		/* "stall" on error */
		retval = -EPIPE;
	}
	spin_unlock_irqrestore(&priv->lock, flags);
	return retval;
}

static void isp1760_endpoint_disable(struct usb_hcd *usb_hcd,
		struct usb_host_endpoint *ep)
{
	struct isp1760_hcd *priv = hcd_to_priv(usb_hcd);
	struct isp1760_qh *qh;
	struct isp1760_qtd *qtd;
	unsigned long flags;

	spin_lock_irqsave(&priv->lock, flags);
	qh = ep->hcpriv;
	if (!qh)
		goto out;

	ep->hcpriv = NULL;
	do {
		/* more than entry might get removed */
		if (list_empty(&qh->qtd_list))
			break;

		qtd = list_first_entry(&qh->qtd_list, struct isp1760_qtd,
				qtd_list);

		if (qtd->status & URB_ENQUEUED) {

			spin_unlock_irqrestore(&priv->lock, flags);
			isp1760_urb_dequeue(usb_hcd, qtd->urb, -ECONNRESET);
			spin_lock_irqsave(&priv->lock, flags);
		} else {
			struct urb *urb;

			urb = qtd->urb;
			clean_up_qtdlist(qtd);
			isp1760_urb_done(priv, urb, -ECONNRESET);
		}
	} while (1);

	qh_destroy(qh);
	/* remove requests and leak them.
	 * ATL are pretty fast done, INT could take a while...
	 * The latter shoule be removed
	 */
out:
	spin_unlock_irqrestore(&priv->lock, flags);
}

static int isp1760_get_frame(struct usb_hcd *hcd)
{
	struct isp1760_hcd *priv = hcd_to_priv(hcd);
	u32 fr;

	fr = isp1760_readl(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;

	isp1760_hub_control(hcd, ClearPortFeature, USB_PORT_FEAT_POWER,	1,
			NULL, 0);
	mdelay(20);

	spin_lock_irq(&priv->lock);
	ehci_reset(priv);
	/* Disable IRQ */
	temp = isp1760_readl(hcd->regs + HC_HW_MODE_CTRL);
	isp1760_writel(temp &= ~HW_GLOBAL_INTR_EN, hcd->regs + HC_HW_MODE_CTRL);
	spin_unlock_irq(&priv->lock);

	isp1760_writel(0, hcd->regs + HC_CONFIGFLAG);
}

static void isp1760_shutdown(struct usb_hcd *hcd)
{
	u32 command, temp;

	isp1760_stop(hcd);
	temp = isp1760_readl(hcd->regs + HC_HW_MODE_CTRL);
	isp1760_writel(temp &= ~HW_GLOBAL_INTR_EN, hcd->regs + HC_HW_MODE_CTRL);

	command = isp1760_readl(hcd->regs + HC_USBCMD);
	command &= ~CMD_RUN;
	isp1760_writel(command, hcd->regs + HC_USBCMD);
}

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,
};

int __init init_kmem_once(void)
{
	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 deinit_kmem_cache(void)
{
	kmem_cache_destroy(qtd_cachep);
	kmem_cache_destroy(qh_cachep);
}

struct usb_hcd *isp1760_register(u64 res_start, u64 res_len, int irq,
		u64 irqflags, struct device *dev, const char *busname,
		unsigned int devflags)
{
	struct usb_hcd *hcd;
	struct isp1760_hcd *priv;
	int ret;

	if (usb_disabled())
		return ERR_PTR(-ENODEV);

	/* prevent usb-core allocating DMA pages */
	dev->dma_mask = NULL;

	hcd = usb_create_hcd(&isp1760_hc_driver, dev, dev_name(dev));
	if (!hcd)
		return ERR_PTR(-ENOMEM);

	priv = hcd_to_priv(hcd);
	priv->devflags = devflags;
	init_memory(priv);
	hcd->regs = ioremap(res_start, res_len);
	if (!hcd->regs) {
		ret = -EIO;
		goto err_put;
	}

	hcd->irq = irq;
	hcd->rsrc_start = res_start;
	hcd->rsrc_len = res_len;

	ret = usb_add_hcd(hcd, irq, irqflags);
	if (ret)
		goto err_unmap;

	return hcd;

err_unmap:
	 iounmap(hcd->regs);

err_put:
	 usb_put_hcd(hcd);

	 return ERR_PTR(ret);
}

MODULE_DESCRIPTION("Driver for the ISP1760 USB-controller from NXP");
MODULE_AUTHOR("Sebastian Siewior <bigeasy@linuxtronix.de>");
MODULE_LICENSE("GPL v2");