27b8f7cb4471e8399f8262feaca409388b11957f
[linux-2.6.git] / drivers / usb / host / isp1760-hcd.c
1 /*
2  * Driver for the NXP ISP1760 chip
3  *
4  * However, the code might contain some bugs. What doesn't work for sure is:
5  * - ISO
6  * - OTG
7  e The interrupt line is configured as active low, level.
8  *
9  * (c) 2007 Sebastian Siewior <bigeasy@linutronix.de>
10  *
11  */
12 #include <linux/module.h>
13 #include <linux/kernel.h>
14 #include <linux/slab.h>
15 #include <linux/list.h>
16 #include <linux/usb.h>
17 #include <linux/debugfs.h>
18 #include <linux/uaccess.h>
19 #include <linux/io.h>
20 #include <asm/unaligned.h>
21
22 #include "../core/hcd.h"
23 #include "isp1760-hcd.h"
24
25 static struct kmem_cache *qtd_cachep;
26 static struct kmem_cache *qh_cachep;
27
28 struct isp1760_hcd {
29         u32 hcs_params;
30         spinlock_t              lock;
31         struct inter_packet_info atl_ints[32];
32         struct inter_packet_info int_ints[32];
33         struct memory_chunk memory_pool[BLOCKS];
34
35         /* periodic schedule support */
36 #define DEFAULT_I_TDPS          1024
37         unsigned                periodic_size;
38         unsigned                i_thresh;
39         unsigned long           reset_done;
40         unsigned long           next_statechange;
41         unsigned int            devflags;
42 };
43
44 static inline struct isp1760_hcd *hcd_to_priv(struct usb_hcd *hcd)
45 {
46         return (struct isp1760_hcd *) (hcd->hcd_priv);
47 }
48 static inline struct usb_hcd *priv_to_hcd(struct isp1760_hcd *priv)
49 {
50         return container_of((void *) priv, struct usb_hcd, hcd_priv);
51 }
52
53 /* Section 2.2 Host Controller Capability Registers */
54 #define HC_LENGTH(p)            (((p)>>00)&0x00ff)      /* bits 7:0 */
55 #define HC_VERSION(p)           (((p)>>16)&0xffff)      /* bits 31:16 */
56 #define HCS_INDICATOR(p)        ((p)&(1 << 16)) /* true: has port indicators */
57 #define HCS_PPC(p)              ((p)&(1 << 4))  /* true: port power control */
58 #define HCS_N_PORTS(p)          (((p)>>0)&0xf)  /* bits 3:0, ports on HC */
59 #define HCC_ISOC_CACHE(p)       ((p)&(1 << 7))  /* true: can cache isoc frame */
60 #define HCC_ISOC_THRES(p)       (((p)>>4)&0x7)  /* bits 6:4, uframes cached */
61
62 /* Section 2.3 Host Controller Operational Registers */
63 #define CMD_LRESET      (1<<7)          /* partial reset (no ports, etc) */
64 #define CMD_RESET       (1<<1)          /* reset HC not bus */
65 #define CMD_RUN         (1<<0)          /* start/stop HC */
66 #define STS_PCD         (1<<2)          /* port change detect */
67 #define FLAG_CF         (1<<0)          /* true: we'll support "high speed" */
68
69 #define PORT_OWNER      (1<<13)         /* true: companion hc owns this port */
70 #define PORT_POWER      (1<<12)         /* true: has power (see PPC) */
71 #define PORT_USB11(x) (((x) & (3 << 10)) == (1 << 10))  /* USB 1.1 device */
72 #define PORT_RESET      (1<<8)          /* reset port */
73 #define PORT_SUSPEND    (1<<7)          /* suspend port */
74 #define PORT_RESUME     (1<<6)          /* resume it */
75 #define PORT_PE         (1<<2)          /* port enable */
76 #define PORT_CSC        (1<<1)          /* connect status change */
77 #define PORT_CONNECT    (1<<0)          /* device connected */
78 #define PORT_RWC_BITS   (PORT_CSC)
79
80 struct isp1760_qtd {
81         struct isp1760_qtd *hw_next;
82         u8 packet_type;
83         u8 toggle;
84
85         void *data_buffer;
86         /* the rest is HCD-private */
87         struct list_head qtd_list;
88         struct urb *urb;
89         size_t length;
90
91         /* isp special*/
92         u32 status;
93 #define URB_COMPLETE_NOTIFY     (1 << 0)
94 #define URB_ENQUEUED            (1 << 1)
95 #define URB_TYPE_ATL            (1 << 2)
96 #define URB_TYPE_INT            (1 << 3)
97 };
98
99 struct isp1760_qh {
100         /* first part defined by EHCI spec */
101         struct list_head qtd_list;
102         struct isp1760_hcd *priv;
103
104         /* periodic schedule info */
105         unsigned short period;          /* polling interval */
106         struct usb_device *dev;
107
108         u32 toggle;
109         u32 ping;
110 };
111
112 #define ehci_port_speed(priv, portsc) (1 << USB_PORT_FEAT_HIGHSPEED)
113
114 static unsigned int isp1760_readl(__u32 __iomem *regs)
115 {
116         return readl(regs);
117 }
118
119 static void isp1760_writel(const unsigned int val, __u32 __iomem *regs)
120 {
121         writel(val, regs);
122 }
123
124 /*
125  * The next two copy via MMIO data to/from the device. memcpy_{to|from}io()
126  * doesn't quite work because some people have to enforce 32-bit access
127  */
128 static void priv_read_copy(struct isp1760_hcd *priv, u32 *src,
129                 __u32 __iomem *dst, u32 len)
130 {
131         u32 val;
132         u8 *buff8;
133
134         if (!src) {
135                 printk(KERN_ERR "ERROR: buffer: %p len: %d\n", src, len);
136                 return;
137         }
138
139         while (len >= 4) {
140                 *src = __raw_readl(dst);
141                 len -= 4;
142                 src++;
143                 dst++;
144         }
145
146         if (!len)
147                 return;
148
149         /* in case we have 3, 2 or 1 by left. The dst buffer may not be fully
150          * allocated.
151          */
152         val = isp1760_readl(dst);
153
154         buff8 = (u8 *)src;
155         while (len) {
156
157                 *buff8 = val;
158                 val >>= 8;
159                 len--;
160                 buff8++;
161         }
162 }
163
164 static void priv_write_copy(const struct isp1760_hcd *priv, const u32 *src,
165                 __u32 __iomem *dst, u32 len)
166 {
167         while (len >= 4) {
168                 __raw_writel(*src, dst);
169                 len -= 4;
170                 src++;
171                 dst++;
172         }
173
174         if (!len)
175                 return;
176         /* in case we have 3, 2 or 1 by left. The buffer is allocated and the
177          * extra bytes should not be read by the HW
178          */
179
180         __raw_writel(*src, dst);
181 }
182
183 /* memory management of the 60kb on the chip from 0x1000 to 0xffff */
184 static void init_memory(struct isp1760_hcd *priv)
185 {
186         int i;
187         u32 payload;
188
189         payload = 0x1000;
190         for (i = 0; i < BLOCK_1_NUM; i++) {
191                 priv->memory_pool[i].start = payload;
192                 priv->memory_pool[i].size = BLOCK_1_SIZE;
193                 priv->memory_pool[i].free = 1;
194                 payload += priv->memory_pool[i].size;
195         }
196
197
198         for (i = BLOCK_1_NUM; i < BLOCK_1_NUM + BLOCK_2_NUM; i++) {
199                 priv->memory_pool[i].start = payload;
200                 priv->memory_pool[i].size = BLOCK_2_SIZE;
201                 priv->memory_pool[i].free = 1;
202                 payload += priv->memory_pool[i].size;
203         }
204
205
206         for (i = BLOCK_1_NUM + BLOCK_2_NUM; i < BLOCKS; i++) {
207                 priv->memory_pool[i].start = payload;
208                 priv->memory_pool[i].size = BLOCK_3_SIZE;
209                 priv->memory_pool[i].free = 1;
210                 payload += priv->memory_pool[i].size;
211         }
212
213         BUG_ON(payload - priv->memory_pool[i - 1].size > PAYLOAD_SIZE);
214 }
215
216 static u32 alloc_mem(struct isp1760_hcd *priv, u32 size)
217 {
218         int i;
219
220         if (!size)
221                 return ISP1760_NULL_POINTER;
222
223         for (i = 0; i < BLOCKS; i++) {
224                 if (priv->memory_pool[i].size >= size &&
225                                 priv->memory_pool[i].free) {
226
227                         priv->memory_pool[i].free = 0;
228                         return priv->memory_pool[i].start;
229                 }
230         }
231
232         printk(KERN_ERR "ISP1760 MEM: can not allocate %d bytes of memory\n",
233                         size);
234         printk(KERN_ERR "Current memory map:\n");
235         for (i = 0; i < BLOCKS; i++) {
236                 printk(KERN_ERR "Pool %2d size %4d status: %d\n",
237                                 i, priv->memory_pool[i].size,
238                                 priv->memory_pool[i].free);
239         }
240         /* XXX maybe -ENOMEM could be possible */
241         BUG();
242         return 0;
243 }
244
245 static void free_mem(struct isp1760_hcd *priv, u32 mem)
246 {
247         int i;
248
249         if (mem == ISP1760_NULL_POINTER)
250                 return;
251
252         for (i = 0; i < BLOCKS; i++) {
253                 if (priv->memory_pool[i].start == mem) {
254
255                         BUG_ON(priv->memory_pool[i].free);
256
257                         priv->memory_pool[i].free = 1;
258                         return ;
259                 }
260         }
261
262         printk(KERN_ERR "Trying to free not-here-allocated memory :%08x\n",
263                         mem);
264         BUG();
265 }
266
267 static void isp1760_init_regs(struct usb_hcd *hcd)
268 {
269         isp1760_writel(0, hcd->regs + HC_BUFFER_STATUS_REG);
270         isp1760_writel(NO_TRANSFER_ACTIVE, hcd->regs +
271                         HC_ATL_PTD_SKIPMAP_REG);
272         isp1760_writel(NO_TRANSFER_ACTIVE, hcd->regs +
273                         HC_INT_PTD_SKIPMAP_REG);
274         isp1760_writel(NO_TRANSFER_ACTIVE, hcd->regs +
275                         HC_ISO_PTD_SKIPMAP_REG);
276
277         isp1760_writel(~NO_TRANSFER_ACTIVE, hcd->regs +
278                         HC_ATL_PTD_DONEMAP_REG);
279         isp1760_writel(~NO_TRANSFER_ACTIVE, hcd->regs +
280                         HC_INT_PTD_DONEMAP_REG);
281         isp1760_writel(~NO_TRANSFER_ACTIVE, hcd->regs +
282                         HC_ISO_PTD_DONEMAP_REG);
283 }
284
285 static int handshake(struct isp1760_hcd *priv, void __iomem *ptr,
286                       u32 mask, u32 done, int usec)
287 {
288         u32 result;
289
290         do {
291                 result = isp1760_readl(ptr);
292                 if (result == ~0)
293                         return -ENODEV;
294                 result &= mask;
295                 if (result == done)
296                         return 0;
297                 udelay(1);
298                 usec--;
299         } while (usec > 0);
300         return -ETIMEDOUT;
301 }
302
303 /* reset a non-running (STS_HALT == 1) controller */
304 static int ehci_reset(struct isp1760_hcd *priv)
305 {
306         int retval;
307         struct usb_hcd *hcd = priv_to_hcd(priv);
308         u32 command = isp1760_readl(hcd->regs + HC_USBCMD);
309
310         command |= CMD_RESET;
311         isp1760_writel(command, hcd->regs + HC_USBCMD);
312         hcd->state = HC_STATE_HALT;
313         priv->next_statechange = jiffies;
314         retval = handshake(priv, hcd->regs + HC_USBCMD,
315                             CMD_RESET, 0, 250 * 1000);
316         return retval;
317 }
318
319 static void qh_destroy(struct isp1760_qh *qh)
320 {
321         BUG_ON(!list_empty(&qh->qtd_list));
322         kmem_cache_free(qh_cachep, qh);
323 }
324
325 static struct isp1760_qh *isp1760_qh_alloc(struct isp1760_hcd *priv,
326                 gfp_t flags)
327 {
328         struct isp1760_qh *qh;
329
330         qh = kmem_cache_zalloc(qh_cachep, flags);
331         if (!qh)
332                 return qh;
333
334         INIT_LIST_HEAD(&qh->qtd_list);
335         qh->priv = priv;
336         return qh;
337 }
338
339 /* magic numbers that can affect system performance */
340 #define EHCI_TUNE_CERR          3       /* 0-3 qtd retries; 0 == don't stop */
341 #define EHCI_TUNE_RL_HS         4       /* nak throttle; see 4.9 */
342 #define EHCI_TUNE_RL_TT         0
343 #define EHCI_TUNE_MULT_HS       1       /* 1-3 transactions/uframe; 4.10.3 */
344 #define EHCI_TUNE_MULT_TT       1
345 #define EHCI_TUNE_FLS           2       /* (small) 256 frame schedule */
346
347 /* one-time init, only for memory state */
348 static int priv_init(struct usb_hcd *hcd)
349 {
350         struct isp1760_hcd              *priv = hcd_to_priv(hcd);
351         u32                     hcc_params;
352
353         spin_lock_init(&priv->lock);
354
355         /*
356          * hw default: 1K periodic list heads, one per frame.
357          * periodic_size can shrink by USBCMD update if hcc_params allows.
358          */
359         priv->periodic_size = DEFAULT_I_TDPS;
360
361         /* controllers may cache some of the periodic schedule ... */
362         hcc_params = isp1760_readl(hcd->regs + HC_HCCPARAMS);
363         /* full frame cache */
364         if (HCC_ISOC_CACHE(hcc_params))
365                 priv->i_thresh = 8;
366         else /* N microframes cached */
367                 priv->i_thresh = 2 + HCC_ISOC_THRES(hcc_params);
368
369         return 0;
370 }
371
372 static int isp1760_hc_setup(struct usb_hcd *hcd)
373 {
374         struct isp1760_hcd *priv = hcd_to_priv(hcd);
375         int result;
376         u32 scratch, hwmode;
377
378         /* Setup HW Mode Control: This assumes a level active-low interrupt */
379         hwmode = HW_DATA_BUS_32BIT;
380
381         if (priv->devflags & ISP1760_FLAG_BUS_WIDTH_16)
382                 hwmode &= ~HW_DATA_BUS_32BIT;
383         if (priv->devflags & ISP1760_FLAG_ANALOG_OC)
384                 hwmode |= HW_ANA_DIGI_OC;
385         if (priv->devflags & ISP1760_FLAG_DACK_POL_HIGH)
386                 hwmode |= HW_DACK_POL_HIGH;
387         if (priv->devflags & ISP1760_FLAG_DREQ_POL_HIGH)
388                 hwmode |= HW_DREQ_POL_HIGH;
389         if (priv->devflags & ISP1760_FLAG_INTR_POL_HIGH)
390                 hwmode |= HW_INTR_HIGH_ACT;
391         if (priv->devflags & ISP1760_FLAG_INTR_EDGE_TRIG)
392                 hwmode |= HW_INTR_EDGE_TRIG;
393
394         /*
395          * We have to set this first in case we're in 16-bit mode.
396          * Write it twice to ensure correct upper bits if switching
397          * to 16-bit mode.
398          */
399         isp1760_writel(hwmode, hcd->regs + HC_HW_MODE_CTRL);
400         isp1760_writel(hwmode, hcd->regs + HC_HW_MODE_CTRL);
401
402         isp1760_writel(0xdeadbabe, hcd->regs + HC_SCRATCH_REG);
403         /* Change bus pattern */
404         scratch = isp1760_readl(hcd->regs + HC_CHIP_ID_REG);
405         scratch = isp1760_readl(hcd->regs + HC_SCRATCH_REG);
406         if (scratch != 0xdeadbabe) {
407                 printk(KERN_ERR "ISP1760: Scratch test failed.\n");
408                 return -ENODEV;
409         }
410
411         /* pre reset */
412         isp1760_init_regs(hcd);
413
414         /* reset */
415         isp1760_writel(SW_RESET_RESET_ALL, hcd->regs + HC_RESET_REG);
416         mdelay(100);
417
418         isp1760_writel(SW_RESET_RESET_HC, hcd->regs + HC_RESET_REG);
419         mdelay(100);
420
421         result = ehci_reset(priv);
422         if (result)
423                 return result;
424
425         /* Step 11 passed */
426
427         isp1760_info(priv, "bus width: %d, oc: %s\n",
428                            (priv->devflags & ISP1760_FLAG_BUS_WIDTH_16) ?
429                            16 : 32, (priv->devflags & ISP1760_FLAG_ANALOG_OC) ?
430                            "analog" : "digital");
431
432         /* ATL reset */
433         isp1760_writel(hwmode | ALL_ATX_RESET, hcd->regs + HC_HW_MODE_CTRL);
434         mdelay(10);
435         isp1760_writel(hwmode, hcd->regs + HC_HW_MODE_CTRL);
436
437         isp1760_writel(INTERRUPT_ENABLE_MASK, hcd->regs + HC_INTERRUPT_REG);
438         isp1760_writel(INTERRUPT_ENABLE_MASK, hcd->regs + HC_INTERRUPT_ENABLE);
439
440         /*
441          * PORT 1 Control register of the ISP1760 is the OTG control
442          * register on ISP1761. Since there is no OTG or device controller
443          * support in this driver, we use port 1 as a "normal" USB host port on
444          * both chips.
445          */
446         isp1760_writel(PORT1_POWER | PORT1_INIT2,
447                        hcd->regs + HC_PORT1_CTRL);
448         mdelay(10);
449
450         priv->hcs_params = isp1760_readl(hcd->regs + HC_HCSPARAMS);
451
452         return priv_init(hcd);
453 }
454
455 static void isp1760_init_maps(struct usb_hcd *hcd)
456 {
457         /*set last maps, for iso its only 1, else 32 tds bitmap*/
458         isp1760_writel(0x80000000, hcd->regs + HC_ATL_PTD_LASTPTD_REG);
459         isp1760_writel(0x80000000, hcd->regs + HC_INT_PTD_LASTPTD_REG);
460         isp1760_writel(0x00000001, hcd->regs + HC_ISO_PTD_LASTPTD_REG);
461 }
462
463 static void isp1760_enable_interrupts(struct usb_hcd *hcd)
464 {
465         isp1760_writel(0, hcd->regs + HC_ATL_IRQ_MASK_AND_REG);
466         isp1760_writel(0, hcd->regs + HC_ATL_IRQ_MASK_OR_REG);
467         isp1760_writel(0, hcd->regs + HC_INT_IRQ_MASK_AND_REG);
468         isp1760_writel(0, hcd->regs + HC_INT_IRQ_MASK_OR_REG);
469         isp1760_writel(0, hcd->regs + HC_ISO_IRQ_MASK_AND_REG);
470         isp1760_writel(0xffffffff, hcd->regs + HC_ISO_IRQ_MASK_OR_REG);
471         /* step 23 passed */
472 }
473
474 static int isp1760_run(struct usb_hcd *hcd)
475 {
476         struct isp1760_hcd *priv = hcd_to_priv(hcd);
477         int retval;
478         u32 temp;
479         u32 command;
480         u32 chipid;
481
482         hcd->uses_new_polling = 1;
483         hcd->poll_rh = 0;
484
485         hcd->state = HC_STATE_RUNNING;
486         isp1760_enable_interrupts(hcd);
487         temp = isp1760_readl(hcd->regs + HC_HW_MODE_CTRL);
488         isp1760_writel(temp | HW_GLOBAL_INTR_EN, hcd->regs + HC_HW_MODE_CTRL);
489
490         command = isp1760_readl(hcd->regs + HC_USBCMD);
491         command &= ~(CMD_LRESET|CMD_RESET);
492         command |= CMD_RUN;
493         isp1760_writel(command, hcd->regs + HC_USBCMD);
494
495         retval = handshake(priv, hcd->regs + HC_USBCMD, CMD_RUN, CMD_RUN,
496                         250 * 1000);
497         if (retval)
498                 return retval;
499
500         /*
501          * XXX
502          * Spec says to write FLAG_CF as last config action, priv code grabs
503          * the semaphore while doing so.
504          */
505         down_write(&ehci_cf_port_reset_rwsem);
506         isp1760_writel(FLAG_CF, hcd->regs + HC_CONFIGFLAG);
507
508         retval = handshake(priv, hcd->regs + HC_CONFIGFLAG, FLAG_CF, FLAG_CF,
509                         250 * 1000);
510         up_write(&ehci_cf_port_reset_rwsem);
511         if (retval)
512                 return retval;
513
514         chipid = isp1760_readl(hcd->regs + HC_CHIP_ID_REG);
515         isp1760_info(priv, "USB ISP %04x HW rev. %d started\n", chipid & 0xffff,
516                         chipid >> 16);
517
518         /* PTD Register Init Part 2, Step 28 */
519         /* enable INTs */
520         isp1760_init_maps(hcd);
521
522         /* GRR this is run-once init(), being done every time the HC starts.
523          * So long as they're part of class devices, we can't do it init()
524          * since the class device isn't created that early.
525          */
526         return 0;
527 }
528
529 static u32 base_to_chip(u32 base)
530 {
531         return ((base - 0x400) >> 3);
532 }
533
534 static void transform_into_atl(struct isp1760_hcd *priv, struct isp1760_qh *qh,
535                         struct isp1760_qtd *qtd, struct urb *urb,
536                         u32 payload, struct ptd *ptd)
537 {
538         u32 dw0;
539         u32 dw1;
540         u32 dw2;
541         u32 dw3;
542         u32 maxpacket;
543         u32 multi;
544         u32 pid_code;
545         u32 rl = RL_COUNTER;
546         u32 nak = NAK_COUNTER;
547
548         /* according to 3.6.2, max packet len can not be > 0x400 */
549         maxpacket = usb_maxpacket(urb->dev, urb->pipe, usb_pipeout(urb->pipe));
550         multi =  1 + ((maxpacket >> 11) & 0x3);
551         maxpacket &= 0x7ff;
552
553         /* DW0 */
554         dw0 = PTD_VALID;
555         dw0 |= PTD_LENGTH(qtd->length);
556         dw0 |= PTD_MAXPACKET(maxpacket);
557         dw0 |= PTD_ENDPOINT(usb_pipeendpoint(urb->pipe));
558         dw1 = usb_pipeendpoint(urb->pipe) >> 1;
559
560         /* DW1 */
561         dw1 |= PTD_DEVICE_ADDR(usb_pipedevice(urb->pipe));
562
563         pid_code = qtd->packet_type;
564         dw1 |= PTD_PID_TOKEN(pid_code);
565
566         if (usb_pipebulk(urb->pipe))
567                 dw1 |= PTD_TRANS_BULK;
568         else if  (usb_pipeint(urb->pipe))
569                 dw1 |= PTD_TRANS_INT;
570
571         if (urb->dev->speed != USB_SPEED_HIGH) {
572                 /* split transaction */
573
574                 dw1 |= PTD_TRANS_SPLIT;
575                 if (urb->dev->speed == USB_SPEED_LOW)
576                         dw1 |= PTD_SE_USB_LOSPEED;
577
578                 dw1 |= PTD_PORT_NUM(urb->dev->ttport);
579                 dw1 |= PTD_HUB_NUM(urb->dev->tt->hub->devnum);
580
581                 /* SE bit for Split INT transfers */
582                 if (usb_pipeint(urb->pipe) &&
583                                 (urb->dev->speed == USB_SPEED_LOW))
584                         dw1 |= 2 << 16;
585
586                 dw3 = 0;
587                 rl = 0;
588                 nak = 0;
589         } else {
590                 dw0 |= PTD_MULTI(multi);
591                 if (usb_pipecontrol(urb->pipe) || usb_pipebulk(urb->pipe))
592                         dw3 = qh->ping;
593                 else
594                         dw3 = 0;
595         }
596         /* DW2 */
597         dw2 = 0;
598         dw2 |= PTD_DATA_START_ADDR(base_to_chip(payload));
599         dw2 |= PTD_RL_CNT(rl);
600         dw3 |= PTD_NAC_CNT(nak);
601
602         /* DW3 */
603         if (usb_pipecontrol(urb->pipe))
604                 dw3 |= PTD_DATA_TOGGLE(qtd->toggle);
605         else
606                 dw3 |= qh->toggle;
607
608
609         dw3 |= PTD_ACTIVE;
610         /* Cerr */
611         dw3 |= PTD_CERR(ERR_COUNTER);
612
613         memset(ptd, 0, sizeof(*ptd));
614
615         ptd->dw0 = cpu_to_le32(dw0);
616         ptd->dw1 = cpu_to_le32(dw1);
617         ptd->dw2 = cpu_to_le32(dw2);
618         ptd->dw3 = cpu_to_le32(dw3);
619 }
620
621 static void transform_add_int(struct isp1760_hcd *priv, struct isp1760_qh *qh,
622                         struct isp1760_qtd *qtd, struct urb *urb,
623                         u32 payload, struct ptd *ptd)
624 {
625         u32 maxpacket;
626         u32 multi;
627         u32 numberofusofs;
628         u32 i;
629         u32 usofmask, usof;
630         u32 period;
631
632         maxpacket = usb_maxpacket(urb->dev, urb->pipe, usb_pipeout(urb->pipe));
633         multi =  1 + ((maxpacket >> 11) & 0x3);
634         maxpacket &= 0x7ff;
635         /* length of the data per uframe */
636         maxpacket = multi * maxpacket;
637
638         numberofusofs = urb->transfer_buffer_length / maxpacket;
639         if (urb->transfer_buffer_length % maxpacket)
640                 numberofusofs += 1;
641
642         usofmask = 1;
643         usof = 0;
644         for (i = 0; i < numberofusofs; i++) {
645                 usof |= usofmask;
646                 usofmask <<= 1;
647         }
648
649         if (urb->dev->speed != USB_SPEED_HIGH) {
650                 /* split */
651                 ptd->dw5 = cpu_to_le32(0x1c);
652
653                 if (qh->period >= 32)
654                         period = qh->period / 2;
655                 else
656                         period = qh->period;
657
658         } else {
659
660                 if (qh->period >= 8)
661                         period = qh->period/8;
662                 else
663                         period = qh->period;
664
665                 if (period >= 32)
666                         period  = 16;
667
668                 if (qh->period >= 8) {
669                         /* millisecond period */
670                         period = (period << 3);
671                 } else {
672                         /* usof based tranmsfers */
673                         /* minimum 4 usofs */
674                         usof = 0x11;
675                 }
676         }
677
678         ptd->dw2 |= cpu_to_le32(period);
679         ptd->dw4 = cpu_to_le32(usof);
680 }
681
682 static void transform_into_int(struct isp1760_hcd *priv, struct isp1760_qh *qh,
683                         struct isp1760_qtd *qtd, struct urb *urb,
684                         u32 payload, struct ptd *ptd)
685 {
686         transform_into_atl(priv, qh, qtd, urb, payload, ptd);
687         transform_add_int(priv, qh, qtd, urb,  payload, ptd);
688 }
689
690 static int qtd_fill(struct isp1760_qtd *qtd, void *databuffer, size_t len,
691                 u32 token)
692 {
693         int count;
694
695         qtd->data_buffer = databuffer;
696         qtd->packet_type = GET_QTD_TOKEN_TYPE(token);
697         qtd->toggle = GET_DATA_TOGGLE(token);
698
699         if (len > HC_ATL_PL_SIZE)
700                 count = HC_ATL_PL_SIZE;
701         else
702                 count = len;
703
704         qtd->length = count;
705         return count;
706 }
707
708 static int check_error(struct ptd *ptd)
709 {
710         int error = 0;
711         u32 dw3;
712
713         dw3 = le32_to_cpu(ptd->dw3);
714         if (dw3 & DW3_HALT_BIT)
715                 error = -EPIPE;
716
717         if (dw3 & DW3_ERROR_BIT) {
718                 printk(KERN_ERR "error bit is set in DW3\n");
719                 error = -EPIPE;
720         }
721
722         if (dw3 & DW3_QTD_ACTIVE) {
723                 printk(KERN_ERR "transfer active bit is set DW3\n");
724                 printk(KERN_ERR "nak counter: %d, rl: %d\n", (dw3 >> 19) & 0xf,
725                                 (le32_to_cpu(ptd->dw2) >> 25) & 0xf);
726         }
727
728         return error;
729 }
730
731 static void check_int_err_status(u32 dw4)
732 {
733         u32 i;
734
735         dw4 >>= 8;
736
737         for (i = 0; i < 8; i++) {
738                 switch (dw4 & 0x7) {
739                 case INT_UNDERRUN:
740                         printk(KERN_ERR "ERROR: under run , %d\n", i);
741                         break;
742
743                 case INT_EXACT:
744                         printk(KERN_ERR "ERROR: transaction error, %d\n", i);
745                         break;
746
747                 case INT_BABBLE:
748                         printk(KERN_ERR "ERROR: babble error, %d\n", i);
749                         break;
750                 }
751                 dw4 >>= 3;
752         }
753 }
754
755 static void enqueue_one_qtd(struct isp1760_qtd *qtd, struct isp1760_hcd *priv,
756                 u32 payload)
757 {
758         u32 token;
759         struct usb_hcd *hcd = priv_to_hcd(priv);
760
761         token = qtd->packet_type;
762
763         if (qtd->length && (qtd->length <= HC_ATL_PL_SIZE)) {
764                 switch (token) {
765                 case IN_PID:
766                         break;
767                 case OUT_PID:
768                 case SETUP_PID:
769                         priv_write_copy(priv, qtd->data_buffer,
770                                         hcd->regs + payload,
771                                         qtd->length);
772                 }
773         }
774 }
775
776 static void enqueue_one_atl_qtd(u32 atl_regs, u32 payload,
777                 struct isp1760_hcd *priv, struct isp1760_qh *qh,
778                 struct urb *urb, u32 slot, struct isp1760_qtd *qtd)
779 {
780         struct ptd ptd;
781         struct usb_hcd *hcd = priv_to_hcd(priv);
782
783         transform_into_atl(priv, qh, qtd, urb, payload, &ptd);
784         priv_write_copy(priv, (u32 *)&ptd, hcd->regs + atl_regs, sizeof(ptd));
785         enqueue_one_qtd(qtd, priv, payload);
786
787         priv->atl_ints[slot].urb = urb;
788         priv->atl_ints[slot].qh = qh;
789         priv->atl_ints[slot].qtd = qtd;
790         priv->atl_ints[slot].data_buffer = qtd->data_buffer;
791         priv->atl_ints[slot].payload = payload;
792         qtd->status |= URB_ENQUEUED | URB_TYPE_ATL;
793         qtd->status |= slot << 16;
794 }
795
796 static void enqueue_one_int_qtd(u32 int_regs, u32 payload,
797                 struct isp1760_hcd *priv, struct isp1760_qh *qh,
798                 struct urb *urb, u32 slot,  struct isp1760_qtd *qtd)
799 {
800         struct ptd ptd;
801         struct usb_hcd *hcd = priv_to_hcd(priv);
802
803         transform_into_int(priv, qh, qtd, urb, payload, &ptd);
804         priv_write_copy(priv, (u32 *)&ptd, hcd->regs + int_regs, sizeof(ptd));
805         enqueue_one_qtd(qtd, priv, payload);
806
807         priv->int_ints[slot].urb = urb;
808         priv->int_ints[slot].qh = qh;
809         priv->int_ints[slot].qtd = qtd;
810         priv->int_ints[slot].data_buffer = qtd->data_buffer;
811         priv->int_ints[slot].payload = payload;
812         qtd->status |= URB_ENQUEUED | URB_TYPE_INT;
813         qtd->status |= slot << 16;
814 }
815
816 static void enqueue_an_ATL_packet(struct usb_hcd *hcd, struct isp1760_qh *qh,
817                                   struct isp1760_qtd *qtd)
818 {
819         struct isp1760_hcd *priv = hcd_to_priv(hcd);
820         u32 skip_map, or_map;
821         u32 queue_entry;
822         u32 slot;
823         u32 atl_regs, payload;
824         u32 buffstatus;
825
826         /*
827          * When this function is called from the interrupt handler to enqueue
828          * a follow-up packet, the SKIP register gets written and read back
829          * almost immediately. With ISP1761, this register requires a delay of
830          * 195ns between a write and subsequent read (see section 15.1.1.3).
831          */
832         ndelay(195);
833         skip_map = isp1760_readl(hcd->regs + HC_ATL_PTD_SKIPMAP_REG);
834
835         BUG_ON(!skip_map);
836         slot = __ffs(skip_map);
837         queue_entry = 1 << slot;
838
839         atl_regs = ATL_REGS_OFFSET + slot * sizeof(struct ptd);
840
841         payload = alloc_mem(priv, qtd->length);
842
843         enqueue_one_atl_qtd(atl_regs, payload, priv, qh, qtd->urb, slot, qtd);
844
845         or_map = isp1760_readl(hcd->regs + HC_ATL_IRQ_MASK_OR_REG);
846         or_map |= queue_entry;
847         isp1760_writel(or_map, hcd->regs + HC_ATL_IRQ_MASK_OR_REG);
848
849         skip_map &= ~queue_entry;
850         isp1760_writel(skip_map, hcd->regs + HC_ATL_PTD_SKIPMAP_REG);
851
852         buffstatus = isp1760_readl(hcd->regs + HC_BUFFER_STATUS_REG);
853         buffstatus |= ATL_BUFFER;
854         isp1760_writel(buffstatus, hcd->regs + HC_BUFFER_STATUS_REG);
855 }
856
857 static void enqueue_an_INT_packet(struct usb_hcd *hcd, struct isp1760_qh *qh,
858                                   struct isp1760_qtd *qtd)
859 {
860         struct isp1760_hcd *priv = hcd_to_priv(hcd);
861         u32 skip_map, or_map;
862         u32 queue_entry;
863         u32 slot;
864         u32 int_regs, payload;
865         u32 buffstatus;
866
867         /*
868          * When this function is called from the interrupt handler to enqueue
869          * a follow-up packet, the SKIP register gets written and read back
870          * almost immediately. With ISP1761, this register requires a delay of
871          * 195ns between a write and subsequent read (see section 15.1.1.3).
872          */
873         ndelay(195);
874         skip_map = isp1760_readl(hcd->regs + HC_INT_PTD_SKIPMAP_REG);
875
876         BUG_ON(!skip_map);
877         slot = __ffs(skip_map);
878         queue_entry = 1 << slot;
879
880         int_regs = INT_REGS_OFFSET + slot * sizeof(struct ptd);
881
882         payload = alloc_mem(priv, qtd->length);
883
884         enqueue_one_int_qtd(int_regs, payload, priv, qh, qtd->urb, slot, qtd);
885
886         or_map = isp1760_readl(hcd->regs + HC_INT_IRQ_MASK_OR_REG);
887         or_map |= queue_entry;
888         isp1760_writel(or_map, hcd->regs + HC_INT_IRQ_MASK_OR_REG);
889
890         skip_map &= ~queue_entry;
891         isp1760_writel(skip_map, hcd->regs + HC_INT_PTD_SKIPMAP_REG);
892
893         buffstatus = isp1760_readl(hcd->regs + HC_BUFFER_STATUS_REG);
894         buffstatus |= INT_BUFFER;
895         isp1760_writel(buffstatus, hcd->regs + HC_BUFFER_STATUS_REG);
896 }
897
898 static void isp1760_urb_done(struct isp1760_hcd *priv, struct urb *urb, int status)
899 __releases(priv->lock)
900 __acquires(priv->lock)
901 {
902         if (!urb->unlinked) {
903                 if (status == -EINPROGRESS)
904                         status = 0;
905         }
906
907         /* complete() can reenter this HCD */
908         usb_hcd_unlink_urb_from_ep(priv_to_hcd(priv), urb);
909         spin_unlock(&priv->lock);
910         usb_hcd_giveback_urb(priv_to_hcd(priv), urb, status);
911         spin_lock(&priv->lock);
912 }
913
914 static void isp1760_qtd_free(struct isp1760_qtd *qtd)
915 {
916         kmem_cache_free(qtd_cachep, qtd);
917 }
918
919 static struct isp1760_qtd *clean_this_qtd(struct isp1760_qtd *qtd)
920 {
921         struct isp1760_qtd *tmp_qtd;
922
923         tmp_qtd = qtd->hw_next;
924         list_del(&qtd->qtd_list);
925         isp1760_qtd_free(qtd);
926         return tmp_qtd;
927 }
928
929 /*
930  * Remove this QTD from the QH list and free its memory. If this QTD
931  * isn't the last one than remove also his successor(s).
932  * Returns the QTD which is part of an new URB and should be enqueued.
933  */
934 static struct isp1760_qtd *clean_up_qtdlist(struct isp1760_qtd *qtd)
935 {
936         struct isp1760_qtd *tmp_qtd;
937         int last_one;
938
939         do {
940                 tmp_qtd = qtd->hw_next;
941                 last_one = qtd->status & URB_COMPLETE_NOTIFY;
942                 list_del(&qtd->qtd_list);
943                 isp1760_qtd_free(qtd);
944                 qtd = tmp_qtd;
945         } while (!last_one && qtd);
946
947         return qtd;
948 }
949
950 static void do_atl_int(struct usb_hcd *usb_hcd)
951 {
952         struct isp1760_hcd *priv = hcd_to_priv(usb_hcd);
953         u32 done_map, skip_map;
954         struct ptd ptd;
955         struct urb *urb = NULL;
956         u32 atl_regs_base;
957         u32 atl_regs;
958         u32 queue_entry;
959         u32 payload;
960         u32 length;
961         u32 or_map;
962         u32 status = -EINVAL;
963         int error;
964         struct isp1760_qtd *qtd;
965         struct isp1760_qh *qh;
966         u32 rl;
967         u32 nakcount;
968
969         done_map = isp1760_readl(usb_hcd->regs +
970                         HC_ATL_PTD_DONEMAP_REG);
971         skip_map = isp1760_readl(usb_hcd->regs +
972                         HC_ATL_PTD_SKIPMAP_REG);
973
974         or_map = isp1760_readl(usb_hcd->regs + HC_ATL_IRQ_MASK_OR_REG);
975         or_map &= ~done_map;
976         isp1760_writel(or_map, usb_hcd->regs + HC_ATL_IRQ_MASK_OR_REG);
977
978         atl_regs_base = ATL_REGS_OFFSET;
979         while (done_map) {
980                 u32 dw1;
981                 u32 dw2;
982                 u32 dw3;
983
984                 status = 0;
985
986                 queue_entry = __ffs(done_map);
987                 done_map &= ~(1 << queue_entry);
988                 skip_map |= 1 << queue_entry;
989
990                 atl_regs = atl_regs_base + queue_entry * sizeof(struct ptd);
991
992                 urb = priv->atl_ints[queue_entry].urb;
993                 qtd = priv->atl_ints[queue_entry].qtd;
994                 qh = priv->atl_ints[queue_entry].qh;
995                 payload = priv->atl_ints[queue_entry].payload;
996
997                 if (!qh) {
998                         printk(KERN_ERR "qh is 0\n");
999                         continue;
1000                 }
1001                 isp1760_writel(atl_regs + ISP_BANK(0), usb_hcd->regs +
1002                                 HC_MEMORY_REG);
1003                 isp1760_writel(payload  + ISP_BANK(1), usb_hcd->regs +
1004                                 HC_MEMORY_REG);
1005                 /*
1006                  * write bank1 address twice to ensure the 90ns delay (time
1007                  * between BANK0 write and the priv_read_copy() call is at
1008                  * least 3*t_WHWL + 2*t_w11 = 3*25ns + 2*17ns = 109ns)
1009                  */
1010                 isp1760_writel(payload  + ISP_BANK(1), usb_hcd->regs +
1011                                 HC_MEMORY_REG);
1012
1013                 priv_read_copy(priv, (u32 *)&ptd, usb_hcd->regs + atl_regs +
1014                                 ISP_BANK(0), sizeof(ptd));
1015
1016                 dw1 = le32_to_cpu(ptd.dw1);
1017                 dw2 = le32_to_cpu(ptd.dw2);
1018                 dw3 = le32_to_cpu(ptd.dw3);
1019                 rl = (dw2 >> 25) & 0x0f;
1020                 nakcount = (dw3 >> 19) & 0xf;
1021
1022                 /* Transfer Error, *but* active and no HALT -> reload */
1023                 if ((dw3 & DW3_ERROR_BIT) && (dw3 & DW3_QTD_ACTIVE) &&
1024                                 !(dw3 & DW3_HALT_BIT)) {
1025
1026                         /* according to ppriv code, we have to
1027                          * reload this one if trasfered bytes != requested bytes
1028                          * else act like everything went smooth..
1029                          * XXX This just doesn't feel right and hasn't
1030                          * triggered so far.
1031                          */
1032
1033                         length = PTD_XFERRED_LENGTH(dw3);
1034                         printk(KERN_ERR "Should reload now.... transfered %d "
1035                                         "of %zu\n", length, qtd->length);
1036                         BUG();
1037                 }
1038
1039                 if (!nakcount && (dw3 & DW3_QTD_ACTIVE)) {
1040                         u32 buffstatus;
1041
1042                         /*
1043                          * NAKs are handled in HW by the chip. Usually if the
1044                          * device is not able to send data fast enough.
1045                          * This happens mostly on slower hardware.
1046                          */
1047                         printk(KERN_NOTICE "Reloading ptd %p/%p... qh %p read: "
1048                                         "%d of %zu done: %08x cur: %08x\n", qtd,
1049                                         urb, qh, PTD_XFERRED_LENGTH(dw3),
1050                                         qtd->length, done_map,
1051                                         (1 << queue_entry));
1052
1053                         /* RL counter = ERR counter */
1054                         dw3 &= ~(0xf << 19);
1055                         dw3 |= rl << 19;
1056                         dw3 &= ~(3 << (55 - 32));
1057                         dw3 |= ERR_COUNTER << (55 - 32);
1058
1059                         /*
1060                          * It is not needed to write skip map back because it
1061                          * is unchanged. Just make sure that this entry is
1062                          * unskipped once it gets written to the HW.
1063                          */
1064                         skip_map &= ~(1 << queue_entry);
1065                         or_map = isp1760_readl(usb_hcd->regs +
1066                                         HC_ATL_IRQ_MASK_OR_REG);
1067                         or_map |= 1 << queue_entry;
1068                         isp1760_writel(or_map, usb_hcd->regs +
1069                                         HC_ATL_IRQ_MASK_OR_REG);
1070
1071                         ptd.dw3 = cpu_to_le32(dw3);
1072                         priv_write_copy(priv, (u32 *)&ptd, usb_hcd->regs +
1073                                         atl_regs, sizeof(ptd));
1074
1075                         ptd.dw0 |= cpu_to_le32(PTD_VALID);
1076                         priv_write_copy(priv, (u32 *)&ptd, usb_hcd->regs +
1077                                         atl_regs, sizeof(ptd));
1078
1079                         buffstatus = isp1760_readl(usb_hcd->regs +
1080                                         HC_BUFFER_STATUS_REG);
1081                         buffstatus |= ATL_BUFFER;
1082                         isp1760_writel(buffstatus, usb_hcd->regs +
1083                                         HC_BUFFER_STATUS_REG);
1084                         continue;
1085                 }
1086
1087                 error = check_error(&ptd);
1088                 if (error) {
1089                         status = error;
1090                         priv->atl_ints[queue_entry].qh->toggle = 0;
1091                         priv->atl_ints[queue_entry].qh->ping = 0;
1092                         urb->status = -EPIPE;
1093
1094 #if 0
1095                         printk(KERN_ERR "Error in %s().\n", __func__);
1096                         printk(KERN_ERR "IN dw0: %08x dw1: %08x dw2: %08x "
1097                                         "dw3: %08x dw4: %08x dw5: %08x dw6: "
1098                                         "%08x dw7: %08x\n",
1099                                         ptd.dw0, ptd.dw1, ptd.dw2, ptd.dw3,
1100                                         ptd.dw4, ptd.dw5, ptd.dw6, ptd.dw7);
1101 #endif
1102                 } else {
1103                         if (usb_pipetype(urb->pipe) == PIPE_BULK) {
1104                                 priv->atl_ints[queue_entry].qh->toggle = dw3 &
1105                                         (1 << 25);
1106                                 priv->atl_ints[queue_entry].qh->ping = dw3 &
1107                                         (1 << 26);
1108                         }
1109                 }
1110
1111                 length = PTD_XFERRED_LENGTH(dw3);
1112                 if (length) {
1113                         switch (DW1_GET_PID(dw1)) {
1114                         case IN_PID:
1115                                 priv_read_copy(priv,
1116                                         priv->atl_ints[queue_entry].data_buffer,
1117                                         usb_hcd->regs + payload + ISP_BANK(1),
1118                                         length);
1119
1120                         case OUT_PID:
1121
1122                                 urb->actual_length += length;
1123
1124                         case SETUP_PID:
1125                                 break;
1126                         }
1127                 }
1128
1129                 priv->atl_ints[queue_entry].data_buffer = NULL;
1130                 priv->atl_ints[queue_entry].urb = NULL;
1131                 priv->atl_ints[queue_entry].qtd = NULL;
1132                 priv->atl_ints[queue_entry].qh = NULL;
1133
1134                 free_mem(priv, payload);
1135
1136                 isp1760_writel(skip_map, usb_hcd->regs +
1137                                 HC_ATL_PTD_SKIPMAP_REG);
1138
1139                 if (urb->status == -EPIPE) {
1140                         /* HALT was received */
1141
1142                         qtd = clean_up_qtdlist(qtd);
1143                         isp1760_urb_done(priv, urb, urb->status);
1144
1145                 } else if (usb_pipebulk(urb->pipe) && (length < qtd->length)) {
1146                         /* short BULK received */
1147
1148                         if (urb->transfer_flags & URB_SHORT_NOT_OK) {
1149                                 urb->status = -EREMOTEIO;
1150                                 isp1760_dbg(priv, "short bulk, %d instead %zu "
1151                                         "with URB_SHORT_NOT_OK flag.\n",
1152                                         length, qtd->length);
1153                         }
1154
1155                         if (urb->status == -EINPROGRESS)
1156                                 urb->status = 0;
1157
1158                         qtd = clean_up_qtdlist(qtd);
1159
1160                         isp1760_urb_done(priv, urb, urb->status);
1161
1162                 } else if (qtd->status & URB_COMPLETE_NOTIFY) {
1163                         /* that was the last qtd of that URB */
1164
1165                         if (urb->status == -EINPROGRESS)
1166                                 urb->status = 0;
1167
1168                         qtd = clean_this_qtd(qtd);
1169                         isp1760_urb_done(priv, urb, urb->status);
1170
1171                 } else {
1172                         /* next QTD of this URB */
1173
1174                         qtd = clean_this_qtd(qtd);
1175                         BUG_ON(!qtd);
1176                 }
1177
1178                 if (qtd)
1179                         enqueue_an_ATL_packet(usb_hcd, qh, qtd);
1180
1181                 skip_map = isp1760_readl(usb_hcd->regs +
1182                                 HC_ATL_PTD_SKIPMAP_REG);
1183         }
1184 }
1185
1186 static void do_intl_int(struct usb_hcd *usb_hcd)
1187 {
1188         struct isp1760_hcd *priv = hcd_to_priv(usb_hcd);
1189         u32 done_map, skip_map;
1190         struct ptd ptd;
1191         struct urb *urb = NULL;
1192         u32 int_regs;
1193         u32 int_regs_base;
1194         u32 payload;
1195         u32 length;
1196         u32 or_map;
1197         int error;
1198         u32 queue_entry;
1199         struct isp1760_qtd *qtd;
1200         struct isp1760_qh *qh;
1201
1202         done_map = isp1760_readl(usb_hcd->regs +
1203                         HC_INT_PTD_DONEMAP_REG);
1204         skip_map = isp1760_readl(usb_hcd->regs +
1205                         HC_INT_PTD_SKIPMAP_REG);
1206
1207         or_map = isp1760_readl(usb_hcd->regs + HC_INT_IRQ_MASK_OR_REG);
1208         or_map &= ~done_map;
1209         isp1760_writel(or_map, usb_hcd->regs + HC_INT_IRQ_MASK_OR_REG);
1210
1211         int_regs_base = INT_REGS_OFFSET;
1212
1213         while (done_map) {
1214                 u32 dw1;
1215                 u32 dw3;
1216
1217                 queue_entry = __ffs(done_map);
1218                 done_map &= ~(1 << queue_entry);
1219                 skip_map |= 1 << queue_entry;
1220
1221                 int_regs = int_regs_base + queue_entry * sizeof(struct ptd);
1222                 urb = priv->int_ints[queue_entry].urb;
1223                 qtd = priv->int_ints[queue_entry].qtd;
1224                 qh = priv->int_ints[queue_entry].qh;
1225                 payload = priv->int_ints[queue_entry].payload;
1226
1227                 if (!qh) {
1228                         printk(KERN_ERR "(INT) qh is 0\n");
1229                         continue;
1230                 }
1231
1232                 isp1760_writel(int_regs + ISP_BANK(0), usb_hcd->regs +
1233                                 HC_MEMORY_REG);
1234                 isp1760_writel(payload  + ISP_BANK(1), usb_hcd->regs +
1235                                 HC_MEMORY_REG);
1236                 /*
1237                  * write bank1 address twice to ensure the 90ns delay (time
1238                  * between BANK0 write and the priv_read_copy() call is at
1239                  * least 3*t_WHWL + 2*t_w11 = 3*25ns + 2*17ns = 92ns)
1240                  */
1241                 isp1760_writel(payload  + ISP_BANK(1), usb_hcd->regs +
1242                                 HC_MEMORY_REG);
1243
1244                 priv_read_copy(priv, (u32 *)&ptd, usb_hcd->regs + int_regs +
1245                                 ISP_BANK(0), sizeof(ptd));
1246                 dw1 = le32_to_cpu(ptd.dw1);
1247                 dw3 = le32_to_cpu(ptd.dw3);
1248                 check_int_err_status(le32_to_cpu(ptd.dw4));
1249
1250                 error = check_error(&ptd);
1251                 if (error) {
1252 #if 0
1253                         printk(KERN_ERR "Error in %s().\n", __func__);
1254                         printk(KERN_ERR "IN dw0: %08x dw1: %08x dw2: %08x "
1255                                         "dw3: %08x dw4: %08x dw5: %08x dw6: "
1256                                         "%08x dw7: %08x\n",
1257                                         ptd.dw0, ptd.dw1, ptd.dw2, ptd.dw3,
1258                                         ptd.dw4, ptd.dw5, ptd.dw6, ptd.dw7);
1259 #endif
1260                         urb->status = -EPIPE;
1261                         priv->int_ints[queue_entry].qh->toggle = 0;
1262                         priv->int_ints[queue_entry].qh->ping = 0;
1263
1264                 } else {
1265                         priv->int_ints[queue_entry].qh->toggle =
1266                                 dw3 & (1 << 25);
1267                         priv->int_ints[queue_entry].qh->ping = dw3 & (1 << 26);
1268                 }
1269
1270                 if (urb->dev->speed != USB_SPEED_HIGH)
1271                         length = PTD_XFERRED_LENGTH_LO(dw3);
1272                 else
1273                         length = PTD_XFERRED_LENGTH(dw3);
1274
1275                 if (length) {
1276                         switch (DW1_GET_PID(dw1)) {
1277                         case IN_PID:
1278                                 priv_read_copy(priv,
1279                                         priv->int_ints[queue_entry].data_buffer,
1280                                         usb_hcd->regs + payload + ISP_BANK(1),
1281                                         length);
1282                         case OUT_PID:
1283
1284                                 urb->actual_length += length;
1285
1286                         case SETUP_PID:
1287                                 break;
1288                         }
1289                 }
1290
1291                 priv->int_ints[queue_entry].data_buffer = NULL;
1292                 priv->int_ints[queue_entry].urb = NULL;
1293                 priv->int_ints[queue_entry].qtd = NULL;
1294                 priv->int_ints[queue_entry].qh = NULL;
1295
1296                 isp1760_writel(skip_map, usb_hcd->regs +
1297                                 HC_INT_PTD_SKIPMAP_REG);
1298                 free_mem(priv, payload);
1299
1300                 if (urb->status == -EPIPE) {
1301                         /* HALT received */
1302
1303                          qtd = clean_up_qtdlist(qtd);
1304                          isp1760_urb_done(priv, urb, urb->status);
1305
1306                 } else if (qtd->status & URB_COMPLETE_NOTIFY) {
1307
1308                         if (urb->status == -EINPROGRESS)
1309                                 urb->status = 0;
1310
1311                         qtd = clean_this_qtd(qtd);
1312                         isp1760_urb_done(priv, urb, urb->status);
1313
1314                 } else {
1315                         /* next QTD of this URB */
1316
1317                         qtd = clean_this_qtd(qtd);
1318                         BUG_ON(!qtd);
1319                 }
1320
1321                 if (qtd)
1322                         enqueue_an_INT_packet(usb_hcd, qh, qtd);
1323
1324                 skip_map = isp1760_readl(usb_hcd->regs +
1325                                 HC_INT_PTD_SKIPMAP_REG);
1326         }
1327 }
1328
1329 #define max_packet(wMaxPacketSize) ((wMaxPacketSize) & 0x07ff)
1330 static struct isp1760_qh *qh_make(struct isp1760_hcd *priv, struct urb *urb,
1331                 gfp_t flags)
1332 {
1333         struct isp1760_qh *qh;
1334         int is_input, type;
1335
1336         qh = isp1760_qh_alloc(priv, flags);
1337         if (!qh)
1338                 return qh;
1339
1340         /*
1341          * init endpoint/device data for this QH
1342          */
1343         is_input = usb_pipein(urb->pipe);
1344         type = usb_pipetype(urb->pipe);
1345
1346         if (type == PIPE_INTERRUPT) {
1347
1348                 if (urb->dev->speed == USB_SPEED_HIGH) {
1349
1350                         qh->period = urb->interval >> 3;
1351                         if (qh->period == 0 && urb->interval != 1) {
1352                                 /* NOTE interval 2 or 4 uframes could work.
1353                                  * But interval 1 scheduling is simpler, and
1354                                  * includes high bandwidth.
1355                                  */
1356                                 printk(KERN_ERR "intr period %d uframes, NYET!",
1357                                                 urb->interval);
1358                                 qh_destroy(qh);
1359                                 return NULL;
1360                         }
1361                 } else {
1362                         qh->period = urb->interval;
1363                 }
1364         }
1365
1366         /* support for tt scheduling, and access to toggles */
1367         qh->dev = urb->dev;
1368
1369         if (!usb_pipecontrol(urb->pipe))
1370                 usb_settoggle(urb->dev, usb_pipeendpoint(urb->pipe), !is_input,
1371                                 1);
1372         return qh;
1373 }
1374
1375 /*
1376  * For control/bulk/interrupt, return QH with these TDs appended.
1377  * Allocates and initializes the QH if necessary.
1378  * Returns null if it can't allocate a QH it needs to.
1379  * If the QH has TDs (urbs) already, that's great.
1380  */
1381 static struct isp1760_qh *qh_append_tds(struct isp1760_hcd *priv,
1382                 struct urb *urb, struct list_head *qtd_list, int epnum,
1383                 void **ptr)
1384 {
1385         struct isp1760_qh *qh;
1386         struct isp1760_qtd *qtd;
1387         struct isp1760_qtd *prev_qtd;
1388
1389         qh = (struct isp1760_qh *)*ptr;
1390         if (!qh) {
1391                 /* can't sleep here, we have priv->lock... */
1392                 qh = qh_make(priv, urb, GFP_ATOMIC);
1393                 if (!qh)
1394                         return qh;
1395                 *ptr = qh;
1396         }
1397
1398         qtd = list_entry(qtd_list->next, struct isp1760_qtd,
1399                         qtd_list);
1400         if (!list_empty(&qh->qtd_list))
1401                 prev_qtd = list_entry(qh->qtd_list.prev,
1402                                 struct isp1760_qtd, qtd_list);
1403         else
1404                 prev_qtd = NULL;
1405
1406         list_splice(qtd_list, qh->qtd_list.prev);
1407         if (prev_qtd) {
1408                 BUG_ON(prev_qtd->hw_next);
1409                 prev_qtd->hw_next = qtd;
1410         }
1411
1412         urb->hcpriv = qh;
1413         return qh;
1414 }
1415
1416 static void qtd_list_free(struct isp1760_hcd *priv, struct urb *urb,
1417                 struct list_head *qtd_list)
1418 {
1419         struct list_head *entry, *temp;
1420
1421         list_for_each_safe(entry, temp, qtd_list) {
1422                 struct isp1760_qtd      *qtd;
1423
1424                 qtd = list_entry(entry, struct isp1760_qtd, qtd_list);
1425                 list_del(&qtd->qtd_list);
1426                 isp1760_qtd_free(qtd);
1427         }
1428 }
1429
1430 static int isp1760_prepare_enqueue(struct isp1760_hcd *priv, struct urb *urb,
1431                 struct list_head *qtd_list, gfp_t mem_flags, packet_enqueue *p)
1432 {
1433         struct isp1760_qtd         *qtd;
1434         int                     epnum;
1435         unsigned long           flags;
1436         struct isp1760_qh          *qh = NULL;
1437         int                     rc;
1438         int qh_busy;
1439
1440         qtd = list_entry(qtd_list->next, struct isp1760_qtd, qtd_list);
1441         epnum = urb->ep->desc.bEndpointAddress;
1442
1443         spin_lock_irqsave(&priv->lock, flags);
1444         if (!test_bit(HCD_FLAG_HW_ACCESSIBLE, &priv_to_hcd(priv)->flags)) {
1445                 rc = -ESHUTDOWN;
1446                 goto done;
1447         }
1448         rc = usb_hcd_link_urb_to_ep(priv_to_hcd(priv), urb);
1449         if (rc)
1450                 goto done;
1451
1452         qh = urb->ep->hcpriv;
1453         if (qh)
1454                 qh_busy = !list_empty(&qh->qtd_list);
1455         else
1456                 qh_busy = 0;
1457
1458         qh = qh_append_tds(priv, urb, qtd_list, epnum, &urb->ep->hcpriv);
1459         if (!qh) {
1460                 usb_hcd_unlink_urb_from_ep(priv_to_hcd(priv), urb);
1461                 rc = -ENOMEM;
1462                 goto done;
1463         }
1464
1465         if (!qh_busy)
1466                 p(priv_to_hcd(priv), qh, qtd);
1467
1468 done:
1469         spin_unlock_irqrestore(&priv->lock, flags);
1470         if (!qh)
1471                 qtd_list_free(priv, urb, qtd_list);
1472         return rc;
1473 }
1474
1475 static struct isp1760_qtd *isp1760_qtd_alloc(struct isp1760_hcd *priv,
1476                 gfp_t flags)
1477 {
1478         struct isp1760_qtd *qtd;
1479
1480         qtd = kmem_cache_zalloc(qtd_cachep, flags);
1481         if (qtd)
1482                 INIT_LIST_HEAD(&qtd->qtd_list);
1483
1484         return qtd;
1485 }
1486
1487 /*
1488  * create a list of filled qtds for this URB; won't link into qh.
1489  */
1490 static struct list_head *qh_urb_transaction(struct isp1760_hcd *priv,
1491                 struct urb *urb, struct list_head *head, gfp_t flags)
1492 {
1493         struct isp1760_qtd *qtd, *qtd_prev;
1494         void *buf;
1495         int len, maxpacket;
1496         int is_input;
1497         u32 token;
1498
1499         /*
1500          * URBs map to sequences of QTDs:  one logical transaction
1501          */
1502         qtd = isp1760_qtd_alloc(priv, flags);
1503         if (!qtd)
1504                 return NULL;
1505
1506         list_add_tail(&qtd->qtd_list, head);
1507         qtd->urb = urb;
1508         urb->status = -EINPROGRESS;
1509
1510         token = 0;
1511         /* for split transactions, SplitXState initialized to zero */
1512
1513         len = urb->transfer_buffer_length;
1514         is_input = usb_pipein(urb->pipe);
1515         if (usb_pipecontrol(urb->pipe)) {
1516                 /* SETUP pid */
1517                 qtd_fill(qtd, urb->setup_packet,
1518                                 sizeof(struct usb_ctrlrequest),
1519                                 token | SETUP_PID);
1520
1521                 /* ... and always at least one more pid */
1522                 token ^= DATA_TOGGLE;
1523                 qtd_prev = qtd;
1524                 qtd = isp1760_qtd_alloc(priv, flags);
1525                 if (!qtd)
1526                         goto cleanup;
1527                 qtd->urb = urb;
1528                 qtd_prev->hw_next = qtd;
1529                 list_add_tail(&qtd->qtd_list, head);
1530
1531                 /* for zero length DATA stages, STATUS is always IN */
1532                 if (len == 0)
1533                         token |= IN_PID;
1534         }
1535
1536         /*
1537          * data transfer stage:  buffer setup
1538          */
1539         buf = urb->transfer_buffer;
1540
1541         if (is_input)
1542                 token |= IN_PID;
1543         else
1544                 token |= OUT_PID;
1545
1546         maxpacket = max_packet(usb_maxpacket(urb->dev, urb->pipe, !is_input));
1547
1548         /*
1549          * buffer gets wrapped in one or more qtds;
1550          * last one may be "short" (including zero len)
1551          * and may serve as a control status ack
1552          */
1553         for (;;) {
1554                 int this_qtd_len;
1555
1556                 if (!buf && len) {
1557                         /* XXX This looks like usb storage / SCSI bug */
1558                         printk(KERN_ERR "buf is null, dma is %08lx len is %d\n",
1559                                         (long unsigned)urb->transfer_dma, len);
1560                         WARN_ON(1);
1561                 }
1562
1563                 this_qtd_len = qtd_fill(qtd, buf, len, token);
1564                 len -= this_qtd_len;
1565                 buf += this_qtd_len;
1566
1567                 /* qh makes control packets use qtd toggle; maybe switch it */
1568                 if ((maxpacket & (this_qtd_len + (maxpacket - 1))) == 0)
1569                         token ^= DATA_TOGGLE;
1570
1571                 if (len <= 0)
1572                         break;
1573
1574                 qtd_prev = qtd;
1575                 qtd = isp1760_qtd_alloc(priv, flags);
1576                 if (!qtd)
1577                         goto cleanup;
1578                 qtd->urb = urb;
1579                 qtd_prev->hw_next = qtd;
1580                 list_add_tail(&qtd->qtd_list, head);
1581         }
1582
1583         /*
1584          * control requests may need a terminating data "status" ack;
1585          * bulk ones may need a terminating short packet (zero length).
1586          */
1587         if (urb->transfer_buffer_length != 0) {
1588                 int one_more = 0;
1589
1590                 if (usb_pipecontrol(urb->pipe)) {
1591                         one_more = 1;
1592                         /* "in" <--> "out"  */
1593                         token ^= IN_PID;
1594                         /* force DATA1 */
1595                         token |= DATA_TOGGLE;
1596                 } else if (usb_pipebulk(urb->pipe)
1597                                 && (urb->transfer_flags & URB_ZERO_PACKET)
1598                                 && !(urb->transfer_buffer_length % maxpacket)) {
1599                         one_more = 1;
1600                 }
1601                 if (one_more) {
1602                         qtd_prev = qtd;
1603                         qtd = isp1760_qtd_alloc(priv, flags);
1604                         if (!qtd)
1605                                 goto cleanup;
1606                         qtd->urb = urb;
1607                         qtd_prev->hw_next = qtd;
1608                         list_add_tail(&qtd->qtd_list, head);
1609
1610                         /* never any data in such packets */
1611                         qtd_fill(qtd, NULL, 0, token);
1612                 }
1613         }
1614
1615         qtd->status = URB_COMPLETE_NOTIFY;
1616         return head;
1617
1618 cleanup:
1619         qtd_list_free(priv, urb, head);
1620         return NULL;
1621 }
1622
1623 static int isp1760_urb_enqueue(struct usb_hcd *hcd, struct urb *urb,
1624                 gfp_t mem_flags)
1625 {
1626         struct isp1760_hcd *priv = hcd_to_priv(hcd);
1627         struct list_head qtd_list;
1628         packet_enqueue *pe;
1629
1630         INIT_LIST_HEAD(&qtd_list);
1631
1632         switch (usb_pipetype(urb->pipe)) {
1633         case PIPE_CONTROL:
1634         case PIPE_BULK:
1635
1636                 if (!qh_urb_transaction(priv, urb, &qtd_list, mem_flags))
1637                         return -ENOMEM;
1638                 pe =  enqueue_an_ATL_packet;
1639                 break;
1640
1641         case PIPE_INTERRUPT:
1642                 if (!qh_urb_transaction(priv, urb, &qtd_list, mem_flags))
1643                         return -ENOMEM;
1644                 pe = enqueue_an_INT_packet;
1645                 break;
1646
1647         case PIPE_ISOCHRONOUS:
1648                 printk(KERN_ERR "PIPE_ISOCHRONOUS ain't supported\n");
1649         default:
1650                 return -EPIPE;
1651         }
1652
1653         return isp1760_prepare_enqueue(priv, urb, &qtd_list, mem_flags, pe);
1654 }
1655
1656 static int isp1760_urb_dequeue(struct usb_hcd *hcd, struct urb *urb,
1657                 int status)
1658 {
1659         struct isp1760_hcd *priv = hcd_to_priv(hcd);
1660         struct inter_packet_info *ints;
1661         u32 i;
1662         u32 reg_base, or_reg, skip_reg;
1663         unsigned long flags;
1664         struct ptd ptd;
1665         packet_enqueue *pe;
1666
1667         switch (usb_pipetype(urb->pipe)) {
1668         case PIPE_ISOCHRONOUS:
1669                 return -EPIPE;
1670                 break;
1671
1672         case PIPE_INTERRUPT:
1673                 ints = priv->int_ints;
1674                 reg_base = INT_REGS_OFFSET;
1675                 or_reg = HC_INT_IRQ_MASK_OR_REG;
1676                 skip_reg = HC_INT_PTD_SKIPMAP_REG;
1677                 pe = enqueue_an_INT_packet;
1678                 break;
1679
1680         default:
1681                 ints = priv->atl_ints;
1682                 reg_base = ATL_REGS_OFFSET;
1683                 or_reg = HC_ATL_IRQ_MASK_OR_REG;
1684                 skip_reg = HC_ATL_PTD_SKIPMAP_REG;
1685                 pe =  enqueue_an_ATL_packet;
1686                 break;
1687         }
1688
1689         memset(&ptd, 0, sizeof(ptd));
1690         spin_lock_irqsave(&priv->lock, flags);
1691
1692         for (i = 0; i < 32; i++) {
1693                 if (ints->urb == urb) {
1694                         u32 skip_map;
1695                         u32 or_map;
1696                         struct isp1760_qtd *qtd;
1697                         struct isp1760_qh *qh = ints->qh;
1698
1699                         skip_map = isp1760_readl(hcd->regs + skip_reg);
1700                         skip_map |= 1 << i;
1701                         isp1760_writel(skip_map, hcd->regs + skip_reg);
1702
1703                         or_map = isp1760_readl(hcd->regs + or_reg);
1704                         or_map &= ~(1 << i);
1705                         isp1760_writel(or_map, hcd->regs + or_reg);
1706
1707                         priv_write_copy(priv, (u32 *)&ptd, hcd->regs + reg_base
1708                                         + i * sizeof(ptd), sizeof(ptd));
1709                         qtd = ints->qtd;
1710                         qtd = clean_up_qtdlist(qtd);
1711
1712                         free_mem(priv, ints->payload);
1713
1714                         ints->urb = NULL;
1715                         ints->qh = NULL;
1716                         ints->qtd = NULL;
1717                         ints->data_buffer = NULL;
1718                         ints->payload = 0;
1719
1720                         isp1760_urb_done(priv, urb, status);
1721                         if (qtd)
1722                                 pe(hcd, qh, qtd);
1723                         break;
1724
1725                 } else if (ints->qtd) {
1726                         struct isp1760_qtd *qtd, *prev_qtd = ints->qtd;
1727
1728                         for (qtd = ints->qtd->hw_next; qtd; qtd = qtd->hw_next) {
1729                                 if (qtd->urb == urb) {
1730                                         prev_qtd->hw_next = clean_up_qtdlist(qtd);
1731                                         isp1760_urb_done(priv, urb, status);
1732                                         break;
1733                                 }
1734                                 prev_qtd = qtd;
1735                         }
1736                         /* we found the urb before the end of the list */
1737                         if (qtd)
1738                                 break;
1739                 }
1740                 ints++;
1741         }
1742
1743         spin_unlock_irqrestore(&priv->lock, flags);
1744         return 0;
1745 }
1746
1747 static irqreturn_t isp1760_irq(struct usb_hcd *usb_hcd)
1748 {
1749         struct isp1760_hcd *priv = hcd_to_priv(usb_hcd);
1750         u32 imask;
1751         irqreturn_t irqret = IRQ_NONE;
1752
1753         spin_lock(&priv->lock);
1754
1755         if (!(usb_hcd->state & HC_STATE_RUNNING))
1756                 goto leave;
1757
1758         imask = isp1760_readl(usb_hcd->regs + HC_INTERRUPT_REG);
1759         if (unlikely(!imask))
1760                 goto leave;
1761
1762         isp1760_writel(imask, usb_hcd->regs + HC_INTERRUPT_REG);
1763         if (imask & HC_ATL_INT)
1764                 do_atl_int(usb_hcd);
1765
1766         if (imask & HC_INTL_INT)
1767                 do_intl_int(usb_hcd);
1768
1769         irqret = IRQ_HANDLED;
1770 leave:
1771         spin_unlock(&priv->lock);
1772         return irqret;
1773 }
1774
1775 static int isp1760_hub_status_data(struct usb_hcd *hcd, char *buf)
1776 {
1777         struct isp1760_hcd *priv = hcd_to_priv(hcd);
1778         u32 temp, status = 0;
1779         u32 mask;
1780         int retval = 1;
1781         unsigned long flags;
1782
1783         /* if !USB_SUSPEND, root hub timers won't get shut down ... */
1784         if (!HC_IS_RUNNING(hcd->state))
1785                 return 0;
1786
1787         /* init status to no-changes */
1788         buf[0] = 0;
1789         mask = PORT_CSC;
1790
1791         spin_lock_irqsave(&priv->lock, flags);
1792         temp = isp1760_readl(hcd->regs + HC_PORTSC1);
1793
1794         if (temp & PORT_OWNER) {
1795                 if (temp & PORT_CSC) {
1796                         temp &= ~PORT_CSC;
1797                         isp1760_writel(temp, hcd->regs + HC_PORTSC1);
1798                         goto done;
1799                 }
1800         }
1801
1802         /*
1803          * Return status information even for ports with OWNER set.
1804          * Otherwise khubd wouldn't see the disconnect event when a
1805          * high-speed device is switched over to the companion
1806          * controller by the user.
1807          */
1808
1809         if ((temp & mask) != 0
1810                         || ((temp & PORT_RESUME) != 0
1811                                 && time_after_eq(jiffies,
1812                                         priv->reset_done))) {
1813                 buf [0] |= 1 << (0 + 1);
1814                 status = STS_PCD;
1815         }
1816         /* FIXME autosuspend idle root hubs */
1817 done:
1818         spin_unlock_irqrestore(&priv->lock, flags);
1819         return status ? retval : 0;
1820 }
1821
1822 static void isp1760_hub_descriptor(struct isp1760_hcd *priv,
1823                 struct usb_hub_descriptor *desc)
1824 {
1825         int ports = HCS_N_PORTS(priv->hcs_params);
1826         u16 temp;
1827
1828         desc->bDescriptorType = 0x29;
1829         /* priv 1.0, 2.3.9 says 20ms max */
1830         desc->bPwrOn2PwrGood = 10;
1831         desc->bHubContrCurrent = 0;
1832
1833         desc->bNbrPorts = ports;
1834         temp = 1 + (ports / 8);
1835         desc->bDescLength = 7 + 2 * temp;
1836
1837         /* two bitmaps:  ports removable, and usb 1.0 legacy PortPwrCtrlMask */
1838         memset(&desc->bitmap[0], 0, temp);
1839         memset(&desc->bitmap[temp], 0xff, temp);
1840
1841         /* per-port overcurrent reporting */
1842         temp = 0x0008;
1843         if (HCS_PPC(priv->hcs_params))
1844                 /* per-port power control */
1845                 temp |= 0x0001;
1846         else
1847                 /* no power switching */
1848                 temp |= 0x0002;
1849         desc->wHubCharacteristics = cpu_to_le16(temp);
1850 }
1851
1852 #define PORT_WAKE_BITS  (PORT_WKOC_E|PORT_WKDISC_E|PORT_WKCONN_E)
1853
1854 static int check_reset_complete(struct isp1760_hcd *priv, int index,
1855                 u32 __iomem *status_reg, int port_status)
1856 {
1857         if (!(port_status & PORT_CONNECT))
1858                 return port_status;
1859
1860         /* if reset finished and it's still not enabled -- handoff */
1861         if (!(port_status & PORT_PE)) {
1862
1863                 printk(KERN_ERR "port %d full speed --> companion\n",
1864                         index + 1);
1865
1866                 port_status |= PORT_OWNER;
1867                 port_status &= ~PORT_RWC_BITS;
1868                 isp1760_writel(port_status, status_reg);
1869
1870         } else
1871                 printk(KERN_ERR "port %d high speed\n", index + 1);
1872
1873         return port_status;
1874 }
1875
1876 static int isp1760_hub_control(struct usb_hcd *hcd, u16 typeReq,
1877                 u16 wValue, u16 wIndex, char *buf, u16 wLength)
1878 {
1879         struct isp1760_hcd *priv = hcd_to_priv(hcd);
1880         int ports = HCS_N_PORTS(priv->hcs_params);
1881         u32 __iomem *status_reg = hcd->regs + HC_PORTSC1;
1882         u32 temp, status;
1883         unsigned long flags;
1884         int retval = 0;
1885         unsigned selector;
1886
1887         /*
1888          * FIXME:  support SetPortFeatures USB_PORT_FEAT_INDICATOR.
1889          * HCS_INDICATOR may say we can change LEDs to off/amber/green.
1890          * (track current state ourselves) ... blink for diagnostics,
1891          * power, "this is the one", etc.  EHCI spec supports this.
1892          */
1893
1894         spin_lock_irqsave(&priv->lock, flags);
1895         switch (typeReq) {
1896         case ClearHubFeature:
1897                 switch (wValue) {
1898                 case C_HUB_LOCAL_POWER:
1899                 case C_HUB_OVER_CURRENT:
1900                         /* no hub-wide feature/status flags */
1901                         break;
1902                 default:
1903                         goto error;
1904                 }
1905                 break;
1906         case ClearPortFeature:
1907                 if (!wIndex || wIndex > ports)
1908                         goto error;
1909                 wIndex--;
1910                 temp = isp1760_readl(status_reg);
1911
1912                 /*
1913                  * Even if OWNER is set, so the port is owned by the
1914                  * companion controller, khubd needs to be able to clear
1915                  * the port-change status bits (especially
1916                  * USB_PORT_FEAT_C_CONNECTION).
1917                  */
1918
1919                 switch (wValue) {
1920                 case USB_PORT_FEAT_ENABLE:
1921                         isp1760_writel(temp & ~PORT_PE, status_reg);
1922                         break;
1923                 case USB_PORT_FEAT_C_ENABLE:
1924                         /* XXX error? */
1925                         break;
1926                 case USB_PORT_FEAT_SUSPEND:
1927                         if (temp & PORT_RESET)
1928                                 goto error;
1929
1930                         if (temp & PORT_SUSPEND) {
1931                                 if ((temp & PORT_PE) == 0)
1932                                         goto error;
1933                                 /* resume signaling for 20 msec */
1934                                 temp &= ~(PORT_RWC_BITS);
1935                                 isp1760_writel(temp | PORT_RESUME,
1936                                                 status_reg);
1937                                 priv->reset_done = jiffies +
1938                                         msecs_to_jiffies(20);
1939                         }
1940                         break;
1941                 case USB_PORT_FEAT_C_SUSPEND:
1942                         /* we auto-clear this feature */
1943                         break;
1944                 case USB_PORT_FEAT_POWER:
1945                         if (HCS_PPC(priv->hcs_params))
1946                                 isp1760_writel(temp & ~PORT_POWER, status_reg);
1947                         break;
1948                 case USB_PORT_FEAT_C_CONNECTION:
1949                         isp1760_writel(temp | PORT_CSC,
1950                                         status_reg);
1951                         break;
1952                 case USB_PORT_FEAT_C_OVER_CURRENT:
1953                         /* XXX error ?*/
1954                         break;
1955                 case USB_PORT_FEAT_C_RESET:
1956                         /* GetPortStatus clears reset */
1957                         break;
1958                 default:
1959                         goto error;
1960                 }
1961                 isp1760_readl(hcd->regs + HC_USBCMD);
1962                 break;
1963         case GetHubDescriptor:
1964                 isp1760_hub_descriptor(priv, (struct usb_hub_descriptor *)
1965                         buf);
1966                 break;
1967         case GetHubStatus:
1968                 /* no hub-wide feature/status flags */
1969                 memset(buf, 0, 4);
1970                 break;
1971         case GetPortStatus:
1972                 if (!wIndex || wIndex > ports)
1973                         goto error;
1974                 wIndex--;
1975                 status = 0;
1976                 temp = isp1760_readl(status_reg);
1977
1978                 /* wPortChange bits */
1979                 if (temp & PORT_CSC)
1980                         status |= 1 << USB_PORT_FEAT_C_CONNECTION;
1981
1982
1983                 /* whoever resumes must GetPortStatus to complete it!! */
1984                 if (temp & PORT_RESUME) {
1985                         printk(KERN_ERR "Port resume should be skipped.\n");
1986
1987                         /* Remote Wakeup received? */
1988                         if (!priv->reset_done) {
1989                                 /* resume signaling for 20 msec */
1990                                 priv->reset_done = jiffies
1991                                                 + msecs_to_jiffies(20);
1992                                 /* check the port again */
1993                                 mod_timer(&priv_to_hcd(priv)->rh_timer,
1994                                                 priv->reset_done);
1995                         }
1996
1997                         /* resume completed? */
1998                         else if (time_after_eq(jiffies,
1999                                         priv->reset_done)) {
2000                                 status |= 1 << USB_PORT_FEAT_C_SUSPEND;
2001                                 priv->reset_done = 0;
2002
2003                                 /* stop resume signaling */
2004                                 temp = isp1760_readl(status_reg);
2005                                 isp1760_writel(
2006                                         temp & ~(PORT_RWC_BITS | PORT_RESUME),
2007                                         status_reg);
2008                                 retval = handshake(priv, status_reg,
2009                                            PORT_RESUME, 0, 2000 /* 2msec */);
2010                                 if (retval != 0) {
2011                                         isp1760_err(priv,
2012                                                 "port %d resume error %d\n",
2013                                                 wIndex + 1, retval);
2014                                         goto error;
2015                                 }
2016                                 temp &= ~(PORT_SUSPEND|PORT_RESUME|(3<<10));
2017                         }
2018                 }
2019
2020                 /* whoever resets must GetPortStatus to complete it!! */
2021                 if ((temp & PORT_RESET)
2022                                 && time_after_eq(jiffies,
2023                                         priv->reset_done)) {
2024                         status |= 1 << USB_PORT_FEAT_C_RESET;
2025                         priv->reset_done = 0;
2026
2027                         /* force reset to complete */
2028                         isp1760_writel(temp & ~PORT_RESET,
2029                                         status_reg);
2030                         /* REVISIT:  some hardware needs 550+ usec to clear
2031                          * this bit; seems too long to spin routinely...
2032                          */
2033                         retval = handshake(priv, status_reg,
2034                                         PORT_RESET, 0, 750);
2035                         if (retval != 0) {
2036                                 isp1760_err(priv, "port %d reset error %d\n",
2037                                                 wIndex + 1, retval);
2038                                 goto error;
2039                         }
2040
2041                         /* see what we found out */
2042                         temp = check_reset_complete(priv, wIndex, status_reg,
2043                                         isp1760_readl(status_reg));
2044                 }
2045                 /*
2046                  * Even if OWNER is set, there's no harm letting khubd
2047                  * see the wPortStatus values (they should all be 0 except
2048                  * for PORT_POWER anyway).
2049                  */
2050
2051                 if (temp & PORT_OWNER)
2052                         printk(KERN_ERR "Warning: PORT_OWNER is set\n");
2053
2054                 if (temp & PORT_CONNECT) {
2055                         status |= 1 << USB_PORT_FEAT_CONNECTION;
2056                         /* status may be from integrated TT */
2057                         status |= ehci_port_speed(priv, temp);
2058                 }
2059                 if (temp & PORT_PE)
2060                         status |= 1 << USB_PORT_FEAT_ENABLE;
2061                 if (temp & (PORT_SUSPEND|PORT_RESUME))
2062                         status |= 1 << USB_PORT_FEAT_SUSPEND;
2063                 if (temp & PORT_RESET)
2064                         status |= 1 << USB_PORT_FEAT_RESET;
2065                 if (temp & PORT_POWER)
2066                         status |= 1 << USB_PORT_FEAT_POWER;
2067
2068                 put_unaligned(cpu_to_le32(status), (__le32 *) buf);
2069                 break;
2070         case SetHubFeature:
2071                 switch (wValue) {
2072                 case C_HUB_LOCAL_POWER:
2073                 case C_HUB_OVER_CURRENT:
2074                         /* no hub-wide feature/status flags */
2075                         break;
2076                 default:
2077                         goto error;
2078                 }
2079                 break;
2080         case SetPortFeature:
2081                 selector = wIndex >> 8;
2082                 wIndex &= 0xff;
2083                 if (!wIndex || wIndex > ports)
2084                         goto error;
2085                 wIndex--;
2086                 temp = isp1760_readl(status_reg);
2087                 if (temp & PORT_OWNER)
2088                         break;
2089
2090 /*              temp &= ~PORT_RWC_BITS; */
2091                 switch (wValue) {
2092                 case USB_PORT_FEAT_ENABLE:
2093                         isp1760_writel(temp | PORT_PE, status_reg);
2094                         break;
2095
2096                 case USB_PORT_FEAT_SUSPEND:
2097                         if ((temp & PORT_PE) == 0
2098                                         || (temp & PORT_RESET) != 0)
2099                                 goto error;
2100
2101                         isp1760_writel(temp | PORT_SUSPEND, status_reg);
2102                         break;
2103                 case USB_PORT_FEAT_POWER:
2104                         if (HCS_PPC(priv->hcs_params))
2105                                 isp1760_writel(temp | PORT_POWER,
2106                                                 status_reg);
2107                         break;
2108                 case USB_PORT_FEAT_RESET:
2109                         if (temp & PORT_RESUME)
2110                                 goto error;
2111                         /* line status bits may report this as low speed,
2112                          * which can be fine if this root hub has a
2113                          * transaction translator built in.
2114                          */
2115                         if ((temp & (PORT_PE|PORT_CONNECT)) == PORT_CONNECT
2116                                         && PORT_USB11(temp)) {
2117                                 temp |= PORT_OWNER;
2118                         } else {
2119                                 temp |= PORT_RESET;
2120                                 temp &= ~PORT_PE;
2121
2122                                 /*
2123                                  * caller must wait, then call GetPortStatus
2124                                  * usb 2.0 spec says 50 ms resets on root
2125                                  */
2126                                 priv->reset_done = jiffies +
2127                                         msecs_to_jiffies(50);
2128                         }
2129                         isp1760_writel(temp, status_reg);
2130                         break;
2131                 default:
2132                         goto error;
2133                 }
2134                 isp1760_readl(hcd->regs + HC_USBCMD);
2135                 break;
2136
2137         default:
2138 error:
2139                 /* "stall" on error */
2140                 retval = -EPIPE;
2141         }
2142         spin_unlock_irqrestore(&priv->lock, flags);
2143         return retval;
2144 }
2145
2146 static void isp1760_endpoint_disable(struct usb_hcd *usb_hcd,
2147                 struct usb_host_endpoint *ep)
2148 {
2149         struct isp1760_hcd *priv = hcd_to_priv(usb_hcd);
2150         struct isp1760_qh *qh;
2151         struct isp1760_qtd *qtd;
2152         unsigned long flags;
2153
2154         spin_lock_irqsave(&priv->lock, flags);
2155         qh = ep->hcpriv;
2156         if (!qh)
2157                 goto out;
2158
2159         ep->hcpriv = NULL;
2160         do {
2161                 /* more than entry might get removed */
2162                 if (list_empty(&qh->qtd_list))
2163                         break;
2164
2165                 qtd = list_first_entry(&qh->qtd_list, struct isp1760_qtd,
2166                                 qtd_list);
2167
2168                 if (qtd->status & URB_ENQUEUED) {
2169
2170                         spin_unlock_irqrestore(&priv->lock, flags);
2171                         isp1760_urb_dequeue(usb_hcd, qtd->urb, -ECONNRESET);
2172                         spin_lock_irqsave(&priv->lock, flags);
2173                 } else {
2174                         struct urb *urb;
2175
2176                         urb = qtd->urb;
2177                         clean_up_qtdlist(qtd);
2178                         isp1760_urb_done(priv, urb, -ECONNRESET);
2179                 }
2180         } while (1);
2181
2182         qh_destroy(qh);
2183         /* remove requests and leak them.
2184          * ATL are pretty fast done, INT could take a while...
2185          * The latter shoule be removed
2186          */
2187 out:
2188         spin_unlock_irqrestore(&priv->lock, flags);
2189 }
2190
2191 static int isp1760_get_frame(struct usb_hcd *hcd)
2192 {
2193         struct isp1760_hcd *priv = hcd_to_priv(hcd);
2194         u32 fr;
2195
2196         fr = isp1760_readl(hcd->regs + HC_FRINDEX);
2197         return (fr >> 3) % priv->periodic_size;
2198 }
2199
2200 static void isp1760_stop(struct usb_hcd *hcd)
2201 {
2202         struct isp1760_hcd *priv = hcd_to_priv(hcd);
2203         u32 temp;
2204
2205         isp1760_hub_control(hcd, ClearPortFeature, USB_PORT_FEAT_POWER, 1,
2206                         NULL, 0);
2207         mdelay(20);
2208
2209         spin_lock_irq(&priv->lock);
2210         ehci_reset(priv);
2211         /* Disable IRQ */
2212         temp = isp1760_readl(hcd->regs + HC_HW_MODE_CTRL);
2213         isp1760_writel(temp &= ~HW_GLOBAL_INTR_EN, hcd->regs + HC_HW_MODE_CTRL);
2214         spin_unlock_irq(&priv->lock);
2215
2216         isp1760_writel(0, hcd->regs + HC_CONFIGFLAG);
2217 }
2218
2219 static void isp1760_shutdown(struct usb_hcd *hcd)
2220 {
2221         u32 command, temp;
2222
2223         isp1760_stop(hcd);
2224         temp = isp1760_readl(hcd->regs + HC_HW_MODE_CTRL);
2225         isp1760_writel(temp &= ~HW_GLOBAL_INTR_EN, hcd->regs + HC_HW_MODE_CTRL);
2226
2227         command = isp1760_readl(hcd->regs + HC_USBCMD);
2228         command &= ~CMD_RUN;
2229         isp1760_writel(command, hcd->regs + HC_USBCMD);
2230 }
2231
2232 static const struct hc_driver isp1760_hc_driver = {
2233         .description            = "isp1760-hcd",
2234         .product_desc           = "NXP ISP1760 USB Host Controller",
2235         .hcd_priv_size          = sizeof(struct isp1760_hcd),
2236         .irq                    = isp1760_irq,
2237         .flags                  = HCD_MEMORY | HCD_USB2,
2238         .reset                  = isp1760_hc_setup,
2239         .start                  = isp1760_run,
2240         .stop                   = isp1760_stop,
2241         .shutdown               = isp1760_shutdown,
2242         .urb_enqueue            = isp1760_urb_enqueue,
2243         .urb_dequeue            = isp1760_urb_dequeue,
2244         .endpoint_disable       = isp1760_endpoint_disable,
2245         .get_frame_number       = isp1760_get_frame,
2246         .hub_status_data        = isp1760_hub_status_data,
2247         .hub_control            = isp1760_hub_control,
2248 };
2249
2250 int __init init_kmem_once(void)
2251 {
2252         qtd_cachep = kmem_cache_create("isp1760_qtd",
2253                         sizeof(struct isp1760_qtd), 0, SLAB_TEMPORARY |
2254                         SLAB_MEM_SPREAD, NULL);
2255
2256         if (!qtd_cachep)
2257                 return -ENOMEM;
2258
2259         qh_cachep = kmem_cache_create("isp1760_qh", sizeof(struct isp1760_qh),
2260                         0, SLAB_TEMPORARY | SLAB_MEM_SPREAD, NULL);
2261
2262         if (!qh_cachep) {
2263                 kmem_cache_destroy(qtd_cachep);
2264                 return -ENOMEM;
2265         }
2266
2267         return 0;
2268 }
2269
2270 void deinit_kmem_cache(void)
2271 {
2272         kmem_cache_destroy(qtd_cachep);
2273         kmem_cache_destroy(qh_cachep);
2274 }
2275
2276 struct usb_hcd *isp1760_register(phys_addr_t res_start, resource_size_t res_len,
2277                                  int irq, unsigned long irqflags,
2278                                  struct device *dev, const char *busname,
2279                                  unsigned int devflags)
2280 {
2281         struct usb_hcd *hcd;
2282         struct isp1760_hcd *priv;
2283         int ret;
2284
2285         if (usb_disabled())
2286                 return ERR_PTR(-ENODEV);
2287
2288         /* prevent usb-core allocating DMA pages */
2289         dev->dma_mask = NULL;
2290
2291         hcd = usb_create_hcd(&isp1760_hc_driver, dev, dev_name(dev));
2292         if (!hcd)
2293                 return ERR_PTR(-ENOMEM);
2294
2295         priv = hcd_to_priv(hcd);
2296         priv->devflags = devflags;
2297         init_memory(priv);
2298         hcd->regs = ioremap(res_start, res_len);
2299         if (!hcd->regs) {
2300                 ret = -EIO;
2301                 goto err_put;
2302         }
2303
2304         hcd->irq = irq;
2305         hcd->rsrc_start = res_start;
2306         hcd->rsrc_len = res_len;
2307
2308         ret = usb_add_hcd(hcd, irq, irqflags);
2309         if (ret)
2310                 goto err_unmap;
2311
2312         return hcd;
2313
2314 err_unmap:
2315          iounmap(hcd->regs);
2316
2317 err_put:
2318          usb_put_hcd(hcd);
2319
2320          return ERR_PTR(ret);
2321 }
2322
2323 MODULE_DESCRIPTION("Driver for the ISP1760 USB-controller from NXP");
2324 MODULE_AUTHOR("Sebastian Siewior <bigeasy@linuxtronix.de>");
2325 MODULE_LICENSE("GPL v2");