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mmc: rtsx_pci: Enable MMC_CAP_ERASE to allow erase/discard/trim requests
[linux/fpc-iii.git] / drivers / usb / isp1760 / isp1760-hcd.c
blobac31d19cc54bcee01cbde7e850d5744e53542777
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 * (c) 2011 Arvid Brodin <arvid.brodin@enea.com>
12 *
13 */
14 #include <linux/gpio/consumer.h>
15 #include <linux/module.h>
16 #include <linux/kernel.h>
17 #include <linux/slab.h>
18 #include <linux/list.h>
19 #include <linux/usb.h>
20 #include <linux/usb/hcd.h>
21 #include <linux/debugfs.h>
22 #include <linux/uaccess.h>
23 #include <linux/io.h>
24 #include <linux/mm.h>
25 #include <linux/timer.h>
26 #include <asm/unaligned.h>
27 #include <asm/cacheflush.h>
28
29 #include "isp1760-core.h"
30 #include "isp1760-hcd.h"
31 #include "isp1760-regs.h"
32
33 static struct kmem_cache *qtd_cachep;
34 static struct kmem_cache *qh_cachep;
35 static struct kmem_cache *urb_listitem_cachep;
36
37 typedef void (packet_enqueue)(struct usb_hcd *hcd, struct isp1760_qh *qh,
38 struct isp1760_qtd *qtd);
39
40 static inline struct isp1760_hcd *hcd_to_priv(struct usb_hcd *hcd)
41 {
42 return *(struct isp1760_hcd **)hcd->hcd_priv;
43 }
44
45 /* urb state*/
46 #define DELETE_URB (0x0008)
47 #define NO_TRANSFER_ACTIVE (0xffffffff)
48
49 /* Philips Proprietary Transfer Descriptor (PTD) */
50 typedef __u32 __bitwise __dw;
51 struct ptd {
52 __dw dw0;
53 __dw dw1;
54 __dw dw2;
55 __dw dw3;
56 __dw dw4;
57 __dw dw5;
58 __dw dw6;
59 __dw dw7;
60 };
61 #define PTD_OFFSET 0x0400
62 #define ISO_PTD_OFFSET 0x0400
63 #define INT_PTD_OFFSET 0x0800
64 #define ATL_PTD_OFFSET 0x0c00
65 #define PAYLOAD_OFFSET 0x1000
66
67
68 /* ATL */
69 /* DW0 */
70 #define DW0_VALID_BIT 1
71 #define FROM_DW0_VALID(x) ((x) & 0x01)
72 #define TO_DW0_LENGTH(x) (((u32) x) << 3)
73 #define TO_DW0_MAXPACKET(x) (((u32) x) << 18)
74 #define TO_DW0_MULTI(x) (((u32) x) << 29)
75 #define TO_DW0_ENDPOINT(x) (((u32) x) << 31)
76 /* DW1 */
77 #define TO_DW1_DEVICE_ADDR(x) (((u32) x) << 3)
78 #define TO_DW1_PID_TOKEN(x) (((u32) x) << 10)
79 #define DW1_TRANS_BULK ((u32) 2 << 12)
80 #define DW1_TRANS_INT ((u32) 3 << 12)
81 #define DW1_TRANS_SPLIT ((u32) 1 << 14)
82 #define DW1_SE_USB_LOSPEED ((u32) 2 << 16)
83 #define TO_DW1_PORT_NUM(x) (((u32) x) << 18)
84 #define TO_DW1_HUB_NUM(x) (((u32) x) << 25)
85 /* DW2 */
86 #define TO_DW2_DATA_START_ADDR(x) (((u32) x) << 8)
87 #define TO_DW2_RL(x) ((x) << 25)
88 #define FROM_DW2_RL(x) (((x) >> 25) & 0xf)
89 /* DW3 */
90 #define FROM_DW3_NRBYTESTRANSFERRED(x) ((x) & 0x7fff)
91 #define FROM_DW3_SCS_NRBYTESTRANSFERRED(x) ((x) & 0x07ff)
92 #define TO_DW3_NAKCOUNT(x) ((x) << 19)
93 #define FROM_DW3_NAKCOUNT(x) (((x) >> 19) & 0xf)
94 #define TO_DW3_CERR(x) ((x) << 23)
95 #define FROM_DW3_CERR(x) (((x) >> 23) & 0x3)
96 #define TO_DW3_DATA_TOGGLE(x) ((x) << 25)
97 #define FROM_DW3_DATA_TOGGLE(x) (((x) >> 25) & 0x1)
98 #define TO_DW3_PING(x) ((x) << 26)
99 #define FROM_DW3_PING(x) (((x) >> 26) & 0x1)
100 #define DW3_ERROR_BIT (1 << 28)
101 #define DW3_BABBLE_BIT (1 << 29)
102 #define DW3_HALT_BIT (1 << 30)
103 #define DW3_ACTIVE_BIT (1 << 31)
104 #define FROM_DW3_ACTIVE(x) (((x) >> 31) & 0x01)
105
106 #define INT_UNDERRUN (1 << 2)
107 #define INT_BABBLE (1 << 1)
108 #define INT_EXACT (1 << 0)
109
110 #define SETUP_PID (2)
111 #define IN_PID (1)
112 #define OUT_PID (0)
113
114 /* Errata 1 */
115 #define RL_COUNTER (0)
116 #define NAK_COUNTER (0)
117 #define ERR_COUNTER (2)
118
119 struct isp1760_qtd {
120 u8 packet_type;
121 void *data_buffer;
122 u32 payload_addr;
123
124 /* the rest is HCD-private */
125 struct list_head qtd_list;
126 struct urb *urb;
127 size_t length;
128 size_t actual_length;
129
130 /* QTD_ENQUEUED: waiting for transfer (inactive) */
131 /* QTD_PAYLOAD_ALLOC: chip mem has been allocated for payload */
132 /* QTD_XFER_STARTED: valid ptd has been written to isp176x - only
133 interrupt handler may touch this qtd! */
134 /* QTD_XFER_COMPLETE: payload has been transferred successfully */
135 /* QTD_RETIRE: transfer error/abort qtd */
136 #define QTD_ENQUEUED 0
137 #define QTD_PAYLOAD_ALLOC 1
138 #define QTD_XFER_STARTED 2
139 #define QTD_XFER_COMPLETE 3
140 #define QTD_RETIRE 4
141 u32 status;
142 };
143
144 /* Queue head, one for each active endpoint */
145 struct isp1760_qh {
146 struct list_head qh_list;
147 struct list_head qtd_list;
148 u32 toggle;
149 u32 ping;
150 int slot;
151 int tt_buffer_dirty; /* See USB2.0 spec section 11.17.5 */
152 };
153
154 struct urb_listitem {
155 struct list_head urb_list;
156 struct urb *urb;
157 };
158
159 /*
160 * Access functions for isp176x registers (addresses 0..0x03FF).
161 */
162 static u32 reg_read32(void __iomem *base, u32 reg)
163 {
164 return isp1760_read32(base, reg);
165 }
166
167 static void reg_write32(void __iomem *base, u32 reg, u32 val)
168 {
169 isp1760_write32(base, reg, val);
170 }
171
172 /*
173 * Access functions for isp176x memory (offset >= 0x0400).
174 *
175 * bank_reads8() reads memory locations prefetched by an earlier write to
176 * HC_MEMORY_REG (see isp176x datasheet). Unless you want to do fancy multi-
177 * bank optimizations, you should use the more generic mem_reads8() below.
178 *
179 * For access to ptd memory, use the specialized ptd_read() and ptd_write()
180 * below.
181 *
182 * These functions copy via MMIO data to/from the device. memcpy_{to|from}io()
183 * doesn't quite work because some people have to enforce 32-bit access
184 */
185 static void bank_reads8(void __iomem *src_base, u32 src_offset, u32 bank_addr,
186 __u32 *dst, u32 bytes)
187 {
188 __u32 __iomem *src;
189 u32 val;
190 __u8 *src_byteptr;
191 __u8 *dst_byteptr;
192
193 src = src_base + (bank_addr | src_offset);
194
195 if (src_offset < PAYLOAD_OFFSET) {
196 while (bytes >= 4) {
197 *dst = le32_to_cpu(__raw_readl(src));
198 bytes -= 4;
199 src++;
200 dst++;
201 }
202 } else {
203 while (bytes >= 4) {
204 *dst = __raw_readl(src);
205 bytes -= 4;
206 src++;
207 dst++;
208 }
209 }
210
211 if (!bytes)
212 return;
213
214 /* in case we have 3, 2 or 1 by left. The dst buffer may not be fully
215 * allocated.
216 */
217 if (src_offset < PAYLOAD_OFFSET)
218 val = le32_to_cpu(__raw_readl(src));
219 else
220 val = __raw_readl(src);
221
222 dst_byteptr = (void *) dst;
223 src_byteptr = (void *) &val;
224 while (bytes > 0) {
225 *dst_byteptr = *src_byteptr;
226 dst_byteptr++;
227 src_byteptr++;
228 bytes--;
229 }
230 }
231
232 static void mem_reads8(void __iomem *src_base, u32 src_offset, void *dst,
233 u32 bytes)
234 {
235 reg_write32(src_base, HC_MEMORY_REG, src_offset + ISP_BANK(0));
236 ndelay(90);
237 bank_reads8(src_base, src_offset, ISP_BANK(0), dst, bytes);
238 }
239
240 static void mem_writes8(void __iomem *dst_base, u32 dst_offset,
241 __u32 const *src, u32 bytes)
242 {
243 __u32 __iomem *dst;
244
245 dst = dst_base + dst_offset;
246
247 if (dst_offset < PAYLOAD_OFFSET) {
248 while (bytes >= 4) {
249 __raw_writel(cpu_to_le32(*src), dst);
250 bytes -= 4;
251 src++;
252 dst++;
253 }
254 } else {
255 while (bytes >= 4) {
256 __raw_writel(*src, dst);
257 bytes -= 4;
258 src++;
259 dst++;
260 }
261 }
262
263 if (!bytes)
264 return;
265 /* in case we have 3, 2 or 1 bytes left. The buffer is allocated and the
266 * extra bytes should not be read by the HW.
267 */
268
269 if (dst_offset < PAYLOAD_OFFSET)
270 __raw_writel(cpu_to_le32(*src), dst);
271 else
272 __raw_writel(*src, dst);
273 }
274
275 /*
276 * Read and write ptds. 'ptd_offset' should be one of ISO_PTD_OFFSET,
277 * INT_PTD_OFFSET, and ATL_PTD_OFFSET. 'slot' should be less than 32.
278 */
279 static void ptd_read(void __iomem *base, u32 ptd_offset, u32 slot,
280 struct ptd *ptd)
281 {
282 reg_write32(base, HC_MEMORY_REG,
283 ISP_BANK(0) + ptd_offset + slot*sizeof(*ptd));
284 ndelay(90);
285 bank_reads8(base, ptd_offset + slot*sizeof(*ptd), ISP_BANK(0),
286 (void *) ptd, sizeof(*ptd));
287 }
288
289 static void ptd_write(void __iomem *base, u32 ptd_offset, u32 slot,
290 struct ptd *ptd)
291 {
292 mem_writes8(base, ptd_offset + slot*sizeof(*ptd) + sizeof(ptd->dw0),
293 &ptd->dw1, 7*sizeof(ptd->dw1));
294 /* Make sure dw0 gets written last (after other dw's and after payload)
295 since it contains the enable bit */
296 wmb();
297 mem_writes8(base, ptd_offset + slot*sizeof(*ptd), &ptd->dw0,
298 sizeof(ptd->dw0));
299 }
300
301
302 /* memory management of the 60kb on the chip from 0x1000 to 0xffff */
303 static void init_memory(struct isp1760_hcd *priv)
304 {
305 int i, curr;
306 u32 payload_addr;
307
308 payload_addr = PAYLOAD_OFFSET;
309 for (i = 0; i < BLOCK_1_NUM; i++) {
310 priv->memory_pool[i].start = payload_addr;
311 priv->memory_pool[i].size = BLOCK_1_SIZE;
312 priv->memory_pool[i].free = 1;
313 payload_addr += priv->memory_pool[i].size;
314 }
315
316 curr = i;
317 for (i = 0; i < BLOCK_2_NUM; i++) {
318 priv->memory_pool[curr + i].start = payload_addr;
319 priv->memory_pool[curr + i].size = BLOCK_2_SIZE;
320 priv->memory_pool[curr + i].free = 1;
321 payload_addr += priv->memory_pool[curr + i].size;
322 }
323
324 curr = i;
325 for (i = 0; i < BLOCK_3_NUM; i++) {
326 priv->memory_pool[curr + i].start = payload_addr;
327 priv->memory_pool[curr + i].size = BLOCK_3_SIZE;
328 priv->memory_pool[curr + i].free = 1;
329 payload_addr += priv->memory_pool[curr + i].size;
330 }
331
332 WARN_ON(payload_addr - priv->memory_pool[0].start > PAYLOAD_AREA_SIZE);
333 }
334
335 static void alloc_mem(struct usb_hcd *hcd, struct isp1760_qtd *qtd)
336 {
337 struct isp1760_hcd *priv = hcd_to_priv(hcd);
338 int i;
339
340 WARN_ON(qtd->payload_addr);
341
342 if (!qtd->length)
343 return;
344
345 for (i = 0; i < BLOCKS; i++) {
346 if (priv->memory_pool[i].size >= qtd->length &&
347 priv->memory_pool[i].free) {
348 priv->memory_pool[i].free = 0;
349 qtd->payload_addr = priv->memory_pool[i].start;
350 return;
351 }
352 }
353 }
354
355 static void free_mem(struct usb_hcd *hcd, struct isp1760_qtd *qtd)
356 {
357 struct isp1760_hcd *priv = hcd_to_priv(hcd);
358 int i;
359
360 if (!qtd->payload_addr)
361 return;
362
363 for (i = 0; i < BLOCKS; i++) {
364 if (priv->memory_pool[i].start == qtd->payload_addr) {
365 WARN_ON(priv->memory_pool[i].free);
366 priv->memory_pool[i].free = 1;
367 qtd->payload_addr = 0;
368 return;
369 }
370 }
371
372 dev_err(hcd->self.controller, "%s: Invalid pointer: %08x\n",
373 __func__, qtd->payload_addr);
374 WARN_ON(1);
375 qtd->payload_addr = 0;
376 }
377
378 static int handshake(struct usb_hcd *hcd, u32 reg,
379 u32 mask, u32 done, int usec)
380 {
381 u32 result;
382
383 do {
384 result = reg_read32(hcd->regs, reg);
385 if (result == ~0)
386 return -ENODEV;
387 result &= mask;
388 if (result == done)
389 return 0;
390 udelay(1);
391 usec--;
392 } while (usec > 0);
393 return -ETIMEDOUT;
394 }
395
396 /* reset a non-running (STS_HALT == 1) controller */
397 static int ehci_reset(struct usb_hcd *hcd)
398 {
399 int retval;
400 struct isp1760_hcd *priv = hcd_to_priv(hcd);
401
402 u32 command = reg_read32(hcd->regs, HC_USBCMD);
403
404 command |= CMD_RESET;
405 reg_write32(hcd->regs, HC_USBCMD, command);
406 hcd->state = HC_STATE_HALT;
407 priv->next_statechange = jiffies;
408 retval = handshake(hcd, HC_USBCMD,
409 CMD_RESET, 0, 250 * 1000);
410 return retval;
411 }
412
413 static struct isp1760_qh *qh_alloc(gfp_t flags)
414 {
415 struct isp1760_qh *qh;
416
417 qh = kmem_cache_zalloc(qh_cachep, flags);
418 if (!qh)
419 return NULL;
420
421 INIT_LIST_HEAD(&qh->qh_list);
422 INIT_LIST_HEAD(&qh->qtd_list);
423 qh->slot = -1;
424
425 return qh;
426 }
427
428 static void qh_free(struct isp1760_qh *qh)
429 {
430 WARN_ON(!list_empty(&qh->qtd_list));
431 WARN_ON(qh->slot > -1);
432 kmem_cache_free(qh_cachep, qh);
433 }
434
435 /* one-time init, only for memory state */
436 static int priv_init(struct usb_hcd *hcd)
437 {
438 struct isp1760_hcd *priv = hcd_to_priv(hcd);
439 u32 hcc_params;
440 int i;
441
442 spin_lock_init(&priv->lock);
443
444 for (i = 0; i < QH_END; i++)
445 INIT_LIST_HEAD(&priv->qh_list[i]);
446
447 /*
448 * hw default: 1K periodic list heads, one per frame.
449 * periodic_size can shrink by USBCMD update if hcc_params allows.
450 */
451 priv->periodic_size = DEFAULT_I_TDPS;
452
453 /* controllers may cache some of the periodic schedule ... */
454 hcc_params = reg_read32(hcd->regs, HC_HCCPARAMS);
455 /* full frame cache */
456 if (HCC_ISOC_CACHE(hcc_params))
457 priv->i_thresh = 8;
458 else /* N microframes cached */
459 priv->i_thresh = 2 + HCC_ISOC_THRES(hcc_params);
460
461 return 0;
462 }
463
464 static int isp1760_hc_setup(struct usb_hcd *hcd)
465 {
466 struct isp1760_hcd *priv = hcd_to_priv(hcd);
467 int result;
468 u32 scratch, hwmode;
469
470 reg_write32(hcd->regs, HC_SCRATCH_REG, 0xdeadbabe);
471 /* Change bus pattern */
472 scratch = reg_read32(hcd->regs, HC_CHIP_ID_REG);
473 scratch = reg_read32(hcd->regs, HC_SCRATCH_REG);
474 if (scratch != 0xdeadbabe) {
475 dev_err(hcd->self.controller, "Scratch test failed.\n");
476 return -ENODEV;
477 }
478
479 /*
480 * The RESET_HC bit in the SW_RESET register is supposed to reset the
481 * host controller without touching the CPU interface registers, but at
482 * least on the ISP1761 it seems to behave as the RESET_ALL bit and
483 * reset the whole device. We thus can't use it here, so let's reset
484 * the host controller through the EHCI USB Command register. The device
485 * has been reset in core code anyway, so this shouldn't matter.
486 */
487 reg_write32(hcd->regs, HC_BUFFER_STATUS_REG, 0);
488 reg_write32(hcd->regs, HC_ATL_PTD_SKIPMAP_REG, NO_TRANSFER_ACTIVE);
489 reg_write32(hcd->regs, HC_INT_PTD_SKIPMAP_REG, NO_TRANSFER_ACTIVE);
490 reg_write32(hcd->regs, HC_ISO_PTD_SKIPMAP_REG, NO_TRANSFER_ACTIVE);
491
492 result = ehci_reset(hcd);
493 if (result)
494 return result;
495
496 /* Step 11 passed */
497
498 /* ATL reset */
499 hwmode = reg_read32(hcd->regs, HC_HW_MODE_CTRL) & ~ALL_ATX_RESET;
500 reg_write32(hcd->regs, HC_HW_MODE_CTRL, hwmode | ALL_ATX_RESET);
501 mdelay(10);
502 reg_write32(hcd->regs, HC_HW_MODE_CTRL, hwmode);
503
504 reg_write32(hcd->regs, HC_INTERRUPT_ENABLE, INTERRUPT_ENABLE_MASK);
505
506 priv->hcs_params = reg_read32(hcd->regs, HC_HCSPARAMS);
507
508 return priv_init(hcd);
509 }
510
511 static u32 base_to_chip(u32 base)
512 {
513 return ((base - 0x400) >> 3);
514 }
515
516 static int last_qtd_of_urb(struct isp1760_qtd *qtd, struct isp1760_qh *qh)
517 {
518 struct urb *urb;
519
520 if (list_is_last(&qtd->qtd_list, &qh->qtd_list))
521 return 1;
522
523 urb = qtd->urb;
524 qtd = list_entry(qtd->qtd_list.next, typeof(*qtd), qtd_list);
525 return (qtd->urb != urb);
526 }
527
528 /* magic numbers that can affect system performance */
529 #define EHCI_TUNE_CERR 3 /* 0-3 qtd retries; 0 == don't stop */
530 #define EHCI_TUNE_RL_HS 4 /* nak throttle; see 4.9 */
531 #define EHCI_TUNE_RL_TT 0
532 #define EHCI_TUNE_MULT_HS 1 /* 1-3 transactions/uframe; 4.10.3 */
533 #define EHCI_TUNE_MULT_TT 1
534 #define EHCI_TUNE_FLS 2 /* (small) 256 frame schedule */
535
536 static void create_ptd_atl(struct isp1760_qh *qh,
537 struct isp1760_qtd *qtd, struct ptd *ptd)
538 {
539 u32 maxpacket;
540 u32 multi;
541 u32 rl = RL_COUNTER;
542 u32 nak = NAK_COUNTER;
543
544 memset(ptd, 0, sizeof(*ptd));
545
546 /* according to 3.6.2, max packet len can not be > 0x400 */
547 maxpacket = usb_maxpacket(qtd->urb->dev, qtd->urb->pipe,
548 usb_pipeout(qtd->urb->pipe));
549 multi = 1 + ((maxpacket >> 11) & 0x3);
550 maxpacket &= 0x7ff;
551
552 /* DW0 */
553 ptd->dw0 = DW0_VALID_BIT;
554 ptd->dw0 |= TO_DW0_LENGTH(qtd->length);
555 ptd->dw0 |= TO_DW0_MAXPACKET(maxpacket);
556 ptd->dw0 |= TO_DW0_ENDPOINT(usb_pipeendpoint(qtd->urb->pipe));
557
558 /* DW1 */
559 ptd->dw1 = usb_pipeendpoint(qtd->urb->pipe) >> 1;
560 ptd->dw1 |= TO_DW1_DEVICE_ADDR(usb_pipedevice(qtd->urb->pipe));
561 ptd->dw1 |= TO_DW1_PID_TOKEN(qtd->packet_type);
562
563 if (usb_pipebulk(qtd->urb->pipe))
564 ptd->dw1 |= DW1_TRANS_BULK;
565 else if (usb_pipeint(qtd->urb->pipe))
566 ptd->dw1 |= DW1_TRANS_INT;
567
568 if (qtd->urb->dev->speed != USB_SPEED_HIGH) {
569 /* split transaction */
570
571 ptd->dw1 |= DW1_TRANS_SPLIT;
572 if (qtd->urb->dev->speed == USB_SPEED_LOW)
573 ptd->dw1 |= DW1_SE_USB_LOSPEED;
574
575 ptd->dw1 |= TO_DW1_PORT_NUM(qtd->urb->dev->ttport);
576 ptd->dw1 |= TO_DW1_HUB_NUM(qtd->urb->dev->tt->hub->devnum);
577
578 /* SE bit for Split INT transfers */
579 if (usb_pipeint(qtd->urb->pipe) &&
580 (qtd->urb->dev->speed == USB_SPEED_LOW))
581 ptd->dw1 |= 2 << 16;
582
583 rl = 0;
584 nak = 0;
585 } else {
586 ptd->dw0 |= TO_DW0_MULTI(multi);
587 if (usb_pipecontrol(qtd->urb->pipe) ||
588 usb_pipebulk(qtd->urb->pipe))
589 ptd->dw3 |= TO_DW3_PING(qh->ping);
590 }
591 /* DW2 */
592 ptd->dw2 = 0;
593 ptd->dw2 |= TO_DW2_DATA_START_ADDR(base_to_chip(qtd->payload_addr));
594 ptd->dw2 |= TO_DW2_RL(rl);
595
596 /* DW3 */
597 ptd->dw3 |= TO_DW3_NAKCOUNT(nak);
598 ptd->dw3 |= TO_DW3_DATA_TOGGLE(qh->toggle);
599 if (usb_pipecontrol(qtd->urb->pipe)) {
600 if (qtd->data_buffer == qtd->urb->setup_packet)
601 ptd->dw3 &= ~TO_DW3_DATA_TOGGLE(1);
602 else if (last_qtd_of_urb(qtd, qh))
603 ptd->dw3 |= TO_DW3_DATA_TOGGLE(1);
604 }
605
606 ptd->dw3 |= DW3_ACTIVE_BIT;
607 /* Cerr */
608 ptd->dw3 |= TO_DW3_CERR(ERR_COUNTER);
609 }
610
611 static void transform_add_int(struct isp1760_qh *qh,
612 struct isp1760_qtd *qtd, struct ptd *ptd)
613 {
614 u32 usof;
615 u32 period;
616
617 /*
618 * Most of this is guessing. ISP1761 datasheet is quite unclear, and
619 * the algorithm from the original Philips driver code, which was
620 * pretty much used in this driver before as well, is quite horrendous
621 * and, i believe, incorrect. The code below follows the datasheet and
622 * USB2.0 spec as far as I can tell, and plug/unplug seems to be much
623 * more reliable this way (fingers crossed...).
624 */
625
626 if (qtd->urb->dev->speed == USB_SPEED_HIGH) {
627 /* urb->interval is in units of microframes (1/8 ms) */
628 period = qtd->urb->interval >> 3;
629
630 if (qtd->urb->interval > 4)
631 usof = 0x01; /* One bit set =>
632 interval 1 ms * uFrame-match */
633 else if (qtd->urb->interval > 2)
634 usof = 0x22; /* Two bits set => interval 1/2 ms */
635 else if (qtd->urb->interval > 1)
636 usof = 0x55; /* Four bits set => interval 1/4 ms */
637 else
638 usof = 0xff; /* All bits set => interval 1/8 ms */
639 } else {
640 /* urb->interval is in units of frames (1 ms) */
641 period = qtd->urb->interval;
642 usof = 0x0f; /* Execute Start Split on any of the
643 four first uFrames */
644
645 /*
646 * First 8 bits in dw5 is uSCS and "specifies which uSOF the
647 * complete split needs to be sent. Valid only for IN." Also,
648 * "All bits can be set to one for every transfer." (p 82,
649 * ISP1761 data sheet.) 0x1c is from Philips driver. Where did
650 * that number come from? 0xff seems to work fine...
651 */
652 /* ptd->dw5 = 0x1c; */
653 ptd->dw5 = 0xff; /* Execute Complete Split on any uFrame */
654 }
655
656 period = period >> 1;/* Ensure equal or shorter period than requested */
657 period &= 0xf8; /* Mask off too large values and lowest unused 3 bits */
658
659 ptd->dw2 |= period;
660 ptd->dw4 = usof;
661 }
662
663 static void create_ptd_int(struct isp1760_qh *qh,
664 struct isp1760_qtd *qtd, struct ptd *ptd)
665 {
666 create_ptd_atl(qh, qtd, ptd);
667 transform_add_int(qh, qtd, ptd);
668 }
669
670 static void isp1760_urb_done(struct usb_hcd *hcd, struct urb *urb)
671 __releases(priv->lock)
672 __acquires(priv->lock)
673 {
674 struct isp1760_hcd *priv = hcd_to_priv(hcd);
675
676 if (!urb->unlinked) {
677 if (urb->status == -EINPROGRESS)
678 urb->status = 0;
679 }
680
681 if (usb_pipein(urb->pipe) && usb_pipetype(urb->pipe) != PIPE_CONTROL) {
682 void *ptr;
683 for (ptr = urb->transfer_buffer;
684 ptr < urb->transfer_buffer + urb->transfer_buffer_length;
685 ptr += PAGE_SIZE)
686 flush_dcache_page(virt_to_page(ptr));
687 }
688
689 /* complete() can reenter this HCD */
690 usb_hcd_unlink_urb_from_ep(hcd, urb);
691 spin_unlock(&priv->lock);
692 usb_hcd_giveback_urb(hcd, urb, urb->status);
693 spin_lock(&priv->lock);
694 }
695
696 static struct isp1760_qtd *qtd_alloc(gfp_t flags, struct urb *urb,
697 u8 packet_type)
698 {
699 struct isp1760_qtd *qtd;
700
701 qtd = kmem_cache_zalloc(qtd_cachep, flags);
702 if (!qtd)
703 return NULL;
704
705 INIT_LIST_HEAD(&qtd->qtd_list);
706 qtd->urb = urb;
707 qtd->packet_type = packet_type;
708 qtd->status = QTD_ENQUEUED;
709 qtd->actual_length = 0;
710
711 return qtd;
712 }
713
714 static void qtd_free(struct isp1760_qtd *qtd)
715 {
716 WARN_ON(qtd->payload_addr);
717 kmem_cache_free(qtd_cachep, qtd);
718 }
719
720 static void start_bus_transfer(struct usb_hcd *hcd, u32 ptd_offset, int slot,
721 struct isp1760_slotinfo *slots,
722 struct isp1760_qtd *qtd, struct isp1760_qh *qh,
723 struct ptd *ptd)
724 {
725 struct isp1760_hcd *priv = hcd_to_priv(hcd);
726 int skip_map;
727
728 WARN_ON((slot < 0) || (slot > 31));
729 WARN_ON(qtd->length && !qtd->payload_addr);
730 WARN_ON(slots[slot].qtd);
731 WARN_ON(slots[slot].qh);
732 WARN_ON(qtd->status != QTD_PAYLOAD_ALLOC);
733
734 /* Make sure done map has not triggered from some unlinked transfer */
735 if (ptd_offset == ATL_PTD_OFFSET) {
736 priv->atl_done_map |= reg_read32(hcd->regs,
737 HC_ATL_PTD_DONEMAP_REG);
738 priv->atl_done_map &= ~(1 << slot);
739 } else {
740 priv->int_done_map |= reg_read32(hcd->regs,
741 HC_INT_PTD_DONEMAP_REG);
742 priv->int_done_map &= ~(1 << slot);
743 }
744
745 qh->slot = slot;
746 qtd->status = QTD_XFER_STARTED;
747 slots[slot].timestamp = jiffies;
748 slots[slot].qtd = qtd;
749 slots[slot].qh = qh;
750 ptd_write(hcd->regs, ptd_offset, slot, ptd);
751
752 if (ptd_offset == ATL_PTD_OFFSET) {
753 skip_map = reg_read32(hcd->regs, HC_ATL_PTD_SKIPMAP_REG);
754 skip_map &= ~(1 << qh->slot);
755 reg_write32(hcd->regs, HC_ATL_PTD_SKIPMAP_REG, skip_map);
756 } else {
757 skip_map = reg_read32(hcd->regs, HC_INT_PTD_SKIPMAP_REG);
758 skip_map &= ~(1 << qh->slot);
759 reg_write32(hcd->regs, HC_INT_PTD_SKIPMAP_REG, skip_map);
760 }
761 }
762
763 static int is_short_bulk(struct isp1760_qtd *qtd)
764 {
765 return (usb_pipebulk(qtd->urb->pipe) &&
766 (qtd->actual_length < qtd->length));
767 }
768
769 static void collect_qtds(struct usb_hcd *hcd, struct isp1760_qh *qh,
770 struct list_head *urb_list)
771 {
772 int last_qtd;
773 struct isp1760_qtd *qtd, *qtd_next;
774 struct urb_listitem *urb_listitem;
775
776 list_for_each_entry_safe(qtd, qtd_next, &qh->qtd_list, qtd_list) {
777 if (qtd->status < QTD_XFER_COMPLETE)
778 break;
779
780 last_qtd = last_qtd_of_urb(qtd, qh);
781
782 if ((!last_qtd) && (qtd->status == QTD_RETIRE))
783 qtd_next->status = QTD_RETIRE;
784
785 if (qtd->status == QTD_XFER_COMPLETE) {
786 if (qtd->actual_length) {
787 switch (qtd->packet_type) {
788 case IN_PID:
789 mem_reads8(hcd->regs, qtd->payload_addr,
790 qtd->data_buffer,
791 qtd->actual_length);
792 /* Fall through (?) */
793 case OUT_PID:
794 qtd->urb->actual_length +=
795 qtd->actual_length;
796 /* Fall through ... */
797 case SETUP_PID:
798 break;
799 }
800 }
801
802 if (is_short_bulk(qtd)) {
803 if (qtd->urb->transfer_flags & URB_SHORT_NOT_OK)
804 qtd->urb->status = -EREMOTEIO;
805 if (!last_qtd)
806 qtd_next->status = QTD_RETIRE;
807 }
808 }
809
810 if (qtd->payload_addr)
811 free_mem(hcd, qtd);
812
813 if (last_qtd) {
814 if ((qtd->status == QTD_RETIRE) &&
815 (qtd->urb->status == -EINPROGRESS))
816 qtd->urb->status = -EPIPE;
817 /* Defer calling of urb_done() since it releases lock */
818 urb_listitem = kmem_cache_zalloc(urb_listitem_cachep,
819 GFP_ATOMIC);
820 if (unlikely(!urb_listitem))
821 break; /* Try again on next call */
822 urb_listitem->urb = qtd->urb;
823 list_add_tail(&urb_listitem->urb_list, urb_list);
824 }
825
826 list_del(&qtd->qtd_list);
827 qtd_free(qtd);
828 }
829 }
830
831 #define ENQUEUE_DEPTH 2
832 static void enqueue_qtds(struct usb_hcd *hcd, struct isp1760_qh *qh)
833 {
834 struct isp1760_hcd *priv = hcd_to_priv(hcd);
835 int ptd_offset;
836 struct isp1760_slotinfo *slots;
837 int curr_slot, free_slot;
838 int n;
839 struct ptd ptd;
840 struct isp1760_qtd *qtd;
841
842 if (unlikely(list_empty(&qh->qtd_list))) {
843 WARN_ON(1);
844 return;
845 }
846
847 /* Make sure this endpoint's TT buffer is clean before queueing ptds */
848 if (qh->tt_buffer_dirty)
849 return;
850
851 if (usb_pipeint(list_entry(qh->qtd_list.next, struct isp1760_qtd,
852 qtd_list)->urb->pipe)) {
853 ptd_offset = INT_PTD_OFFSET;
854 slots = priv->int_slots;
855 } else {
856 ptd_offset = ATL_PTD_OFFSET;
857 slots = priv->atl_slots;
858 }
859
860 free_slot = -1;
861 for (curr_slot = 0; curr_slot < 32; curr_slot++) {
862 if ((free_slot == -1) && (slots[curr_slot].qtd == NULL))
863 free_slot = curr_slot;
864 if (slots[curr_slot].qh == qh)
865 break;
866 }
867
868 n = 0;
869 list_for_each_entry(qtd, &qh->qtd_list, qtd_list) {
870 if (qtd->status == QTD_ENQUEUED) {
871 WARN_ON(qtd->payload_addr);
872 alloc_mem(hcd, qtd);
873 if ((qtd->length) && (!qtd->payload_addr))
874 break;
875
876 if ((qtd->length) &&
877 ((qtd->packet_type == SETUP_PID) ||
878 (qtd->packet_type == OUT_PID))) {
879 mem_writes8(hcd->regs, qtd->payload_addr,
880 qtd->data_buffer, qtd->length);
881 }
882
883 qtd->status = QTD_PAYLOAD_ALLOC;
884 }
885
886 if (qtd->status == QTD_PAYLOAD_ALLOC) {
887 /*
888 if ((curr_slot > 31) && (free_slot == -1))
889 dev_dbg(hcd->self.controller, "%s: No slot "
890 "available for transfer\n", __func__);
891 */
892 /* Start xfer for this endpoint if not already done */
893 if ((curr_slot > 31) && (free_slot > -1)) {
894 if (usb_pipeint(qtd->urb->pipe))
895 create_ptd_int(qh, qtd, &ptd);
896 else
897 create_ptd_atl(qh, qtd, &ptd);
898
899 start_bus_transfer(hcd, ptd_offset, free_slot,
900 slots, qtd, qh, &ptd);
901 curr_slot = free_slot;
902 }
903
904 n++;
905 if (n >= ENQUEUE_DEPTH)
906 break;
907 }
908 }
909 }
910
911 static void schedule_ptds(struct usb_hcd *hcd)
912 {
913 struct isp1760_hcd *priv;
914 struct isp1760_qh *qh, *qh_next;
915 struct list_head *ep_queue;
916 LIST_HEAD(urb_list);
917 struct urb_listitem *urb_listitem, *urb_listitem_next;
918 int i;
919
920 if (!hcd) {
921 WARN_ON(1);
922 return;
923 }
924
925 priv = hcd_to_priv(hcd);
926
927 /*
928 * check finished/retired xfers, transfer payloads, call urb_done()
929 */
930 for (i = 0; i < QH_END; i++) {
931 ep_queue = &priv->qh_list[i];
932 list_for_each_entry_safe(qh, qh_next, ep_queue, qh_list) {
933 collect_qtds(hcd, qh, &urb_list);
934 if (list_empty(&qh->qtd_list))
935 list_del(&qh->qh_list);
936 }
937 }
938
939 list_for_each_entry_safe(urb_listitem, urb_listitem_next, &urb_list,
940 urb_list) {
941 isp1760_urb_done(hcd, urb_listitem->urb);
942 kmem_cache_free(urb_listitem_cachep, urb_listitem);
943 }
944
945 /*
946 * Schedule packets for transfer.
947 *
948 * According to USB2.0 specification:
949 *
950 * 1st prio: interrupt xfers, up to 80 % of bandwidth
951 * 2nd prio: control xfers
952 * 3rd prio: bulk xfers
953 *
954 * ... but let's use a simpler scheme here (mostly because ISP1761 doc
955 * is very unclear on how to prioritize traffic):
956 *
957 * 1) Enqueue any queued control transfers, as long as payload chip mem
958 * and PTD ATL slots are available.
959 * 2) Enqueue any queued INT transfers, as long as payload chip mem
960 * and PTD INT slots are available.
961 * 3) Enqueue any queued bulk transfers, as long as payload chip mem
962 * and PTD ATL slots are available.
963 *
964 * Use double buffering (ENQUEUE_DEPTH==2) as a compromise between
965 * conservation of chip mem and performance.
966 *
967 * I'm sure this scheme could be improved upon!
968 */
969 for (i = 0; i < QH_END; i++) {
970 ep_queue = &priv->qh_list[i];
971 list_for_each_entry_safe(qh, qh_next, ep_queue, qh_list)
972 enqueue_qtds(hcd, qh);
973 }
974 }
975
976 #define PTD_STATE_QTD_DONE 1
977 #define PTD_STATE_QTD_RELOAD 2
978 #define PTD_STATE_URB_RETIRE 3
979
980 static int check_int_transfer(struct usb_hcd *hcd, struct ptd *ptd,
981 struct urb *urb)
982 {
983 __dw dw4;
984 int i;
985
986 dw4 = ptd->dw4;
987 dw4 >>= 8;
988
989 /* FIXME: ISP1761 datasheet does not say what to do with these. Do we
990 need to handle these errors? Is it done in hardware? */
991
992 if (ptd->dw3 & DW3_HALT_BIT) {
993
994 urb->status = -EPROTO; /* Default unknown error */
995
996 for (i = 0; i < 8; i++) {
997 switch (dw4 & 0x7) {
998 case INT_UNDERRUN:
999 dev_dbg(hcd->self.controller, "%s: underrun "
1000 "during uFrame %d\n",
1001 __func__, i);
1002 urb->status = -ECOMM; /* Could not write data */
1003 break;
1004 case INT_EXACT:
1005 dev_dbg(hcd->self.controller, "%s: transaction "
1006 "error during uFrame %d\n",
1007 __func__, i);
1008 urb->status = -EPROTO; /* timeout, bad CRC, PID
1009 error etc. */
1010 break;
1011 case INT_BABBLE:
1012 dev_dbg(hcd->self.controller, "%s: babble "
1013 "error during uFrame %d\n",
1014 __func__, i);
1015 urb->status = -EOVERFLOW;
1016 break;
1017 }
1018 dw4 >>= 3;
1019 }
1020
1021 return PTD_STATE_URB_RETIRE;
1022 }
1023
1024 return PTD_STATE_QTD_DONE;
1025 }
1026
1027 static int check_atl_transfer(struct usb_hcd *hcd, struct ptd *ptd,
1028 struct urb *urb)
1029 {
1030 WARN_ON(!ptd);
1031 if (ptd->dw3 & DW3_HALT_BIT) {
1032 if (ptd->dw3 & DW3_BABBLE_BIT)
1033 urb->status = -EOVERFLOW;
1034 else if (FROM_DW3_CERR(ptd->dw3))
1035 urb->status = -EPIPE; /* Stall */
1036 else if (ptd->dw3 & DW3_ERROR_BIT)
1037 urb->status = -EPROTO; /* XactErr */
1038 else
1039 urb->status = -EPROTO; /* Unknown */
1040 /*
1041 dev_dbg(hcd->self.controller, "%s: ptd error:\n"
1042 " dw0: %08x dw1: %08x dw2: %08x dw3: %08x\n"
1043 " dw4: %08x dw5: %08x dw6: %08x dw7: %08x\n",
1044 __func__,
1045 ptd->dw0, ptd->dw1, ptd->dw2, ptd->dw3,
1046 ptd->dw4, ptd->dw5, ptd->dw6, ptd->dw7);
1047 */
1048 return PTD_STATE_URB_RETIRE;
1049 }
1050
1051 if ((ptd->dw3 & DW3_ERROR_BIT) && (ptd->dw3 & DW3_ACTIVE_BIT)) {
1052 /* Transfer Error, *but* active and no HALT -> reload */
1053 dev_dbg(hcd->self.controller, "PID error; reloading ptd\n");
1054 return PTD_STATE_QTD_RELOAD;
1055 }
1056
1057 if (!FROM_DW3_NAKCOUNT(ptd->dw3) && (ptd->dw3 & DW3_ACTIVE_BIT)) {
1058 /*
1059 * NAKs are handled in HW by the chip. Usually if the
1060 * device is not able to send data fast enough.
1061 * This happens mostly on slower hardware.
1062 */
1063 return PTD_STATE_QTD_RELOAD;
1064 }
1065
1066 return PTD_STATE_QTD_DONE;
1067 }
1068
1069 static void handle_done_ptds(struct usb_hcd *hcd)
1070 {
1071 struct isp1760_hcd *priv = hcd_to_priv(hcd);
1072 struct ptd ptd;
1073 struct isp1760_qh *qh;
1074 int slot;
1075 int state;
1076 struct isp1760_slotinfo *slots;
1077 u32 ptd_offset;
1078 struct isp1760_qtd *qtd;
1079 int modified;
1080 int skip_map;
1081
1082 skip_map = reg_read32(hcd->regs, HC_INT_PTD_SKIPMAP_REG);
1083 priv->int_done_map &= ~skip_map;
1084 skip_map = reg_read32(hcd->regs, HC_ATL_PTD_SKIPMAP_REG);
1085 priv->atl_done_map &= ~skip_map;
1086
1087 modified = priv->int_done_map || priv->atl_done_map;
1088
1089 while (priv->int_done_map || priv->atl_done_map) {
1090 if (priv->int_done_map) {
1091 /* INT ptd */
1092 slot = __ffs(priv->int_done_map);
1093 priv->int_done_map &= ~(1 << slot);
1094 slots = priv->int_slots;
1095 /* This should not trigger, and could be removed if
1096 noone have any problems with it triggering: */
1097 if (!slots[slot].qh) {
1098 WARN_ON(1);
1099 continue;
1100 }
1101 ptd_offset = INT_PTD_OFFSET;
1102 ptd_read(hcd->regs, INT_PTD_OFFSET, slot, &ptd);
1103 state = check_int_transfer(hcd, &ptd,
1104 slots[slot].qtd->urb);
1105 } else {
1106 /* ATL ptd */
1107 slot = __ffs(priv->atl_done_map);
1108 priv->atl_done_map &= ~(1 << slot);
1109 slots = priv->atl_slots;
1110 /* This should not trigger, and could be removed if
1111 noone have any problems with it triggering: */
1112 if (!slots[slot].qh) {
1113 WARN_ON(1);
1114 continue;
1115 }
1116 ptd_offset = ATL_PTD_OFFSET;
1117 ptd_read(hcd->regs, ATL_PTD_OFFSET, slot, &ptd);
1118 state = check_atl_transfer(hcd, &ptd,
1119 slots[slot].qtd->urb);
1120 }
1121
1122 qtd = slots[slot].qtd;
1123 slots[slot].qtd = NULL;
1124 qh = slots[slot].qh;
1125 slots[slot].qh = NULL;
1126 qh->slot = -1;
1127
1128 WARN_ON(qtd->status != QTD_XFER_STARTED);
1129
1130 switch (state) {
1131 case PTD_STATE_QTD_DONE:
1132 if ((usb_pipeint(qtd->urb->pipe)) &&
1133 (qtd->urb->dev->speed != USB_SPEED_HIGH))
1134 qtd->actual_length =
1135 FROM_DW3_SCS_NRBYTESTRANSFERRED(ptd.dw3);
1136 else
1137 qtd->actual_length =
1138 FROM_DW3_NRBYTESTRANSFERRED(ptd.dw3);
1139
1140 qtd->status = QTD_XFER_COMPLETE;
1141 if (list_is_last(&qtd->qtd_list, &qh->qtd_list) ||
1142 is_short_bulk(qtd))
1143 qtd = NULL;
1144 else
1145 qtd = list_entry(qtd->qtd_list.next,
1146 typeof(*qtd), qtd_list);
1147
1148 qh->toggle = FROM_DW3_DATA_TOGGLE(ptd.dw3);
1149 qh->ping = FROM_DW3_PING(ptd.dw3);
1150 break;
1151
1152 case PTD_STATE_QTD_RELOAD: /* QTD_RETRY, for atls only */
1153 qtd->status = QTD_PAYLOAD_ALLOC;
1154 ptd.dw0 |= DW0_VALID_BIT;
1155 /* RL counter = ERR counter */
1156 ptd.dw3 &= ~TO_DW3_NAKCOUNT(0xf);
1157 ptd.dw3 |= TO_DW3_NAKCOUNT(FROM_DW2_RL(ptd.dw2));
1158 ptd.dw3 &= ~TO_DW3_CERR(3);
1159 ptd.dw3 |= TO_DW3_CERR(ERR_COUNTER);
1160 qh->toggle = FROM_DW3_DATA_TOGGLE(ptd.dw3);
1161 qh->ping = FROM_DW3_PING(ptd.dw3);
1162 break;
1163
1164 case PTD_STATE_URB_RETIRE:
1165 qtd->status = QTD_RETIRE;
1166 if ((qtd->urb->dev->speed != USB_SPEED_HIGH) &&
1167 (qtd->urb->status != -EPIPE) &&
1168 (qtd->urb->status != -EREMOTEIO)) {
1169 qh->tt_buffer_dirty = 1;
1170 if (usb_hub_clear_tt_buffer(qtd->urb))
1171 /* Clear failed; let's hope things work
1172 anyway */
1173 qh->tt_buffer_dirty = 0;
1174 }
1175 qtd = NULL;
1176 qh->toggle = 0;
1177 qh->ping = 0;
1178 break;
1179
1180 default:
1181 WARN_ON(1);
1182 continue;
1183 }
1184
1185 if (qtd && (qtd->status == QTD_PAYLOAD_ALLOC)) {
1186 if (slots == priv->int_slots) {
1187 if (state == PTD_STATE_QTD_RELOAD)
1188 dev_err(hcd->self.controller,
1189 "%s: PTD_STATE_QTD_RELOAD on "
1190 "interrupt packet\n", __func__);
1191 if (state != PTD_STATE_QTD_RELOAD)
1192 create_ptd_int(qh, qtd, &ptd);
1193 } else {
1194 if (state != PTD_STATE_QTD_RELOAD)
1195 create_ptd_atl(qh, qtd, &ptd);
1196 }
1197
1198 start_bus_transfer(hcd, ptd_offset, slot, slots, qtd,
1199 qh, &ptd);
1200 }
1201 }
1202
1203 if (modified)
1204 schedule_ptds(hcd);
1205 }
1206
1207 static irqreturn_t isp1760_irq(struct usb_hcd *hcd)
1208 {
1209 struct isp1760_hcd *priv = hcd_to_priv(hcd);
1210 u32 imask;
1211 irqreturn_t irqret = IRQ_NONE;
1212
1213 spin_lock(&priv->lock);
1214
1215 if (!(hcd->state & HC_STATE_RUNNING))
1216 goto leave;
1217
1218 imask = reg_read32(hcd->regs, HC_INTERRUPT_REG);
1219 if (unlikely(!imask))
1220 goto leave;
1221 reg_write32(hcd->regs, HC_INTERRUPT_REG, imask); /* Clear */
1222
1223 priv->int_done_map |= reg_read32(hcd->regs, HC_INT_PTD_DONEMAP_REG);
1224 priv->atl_done_map |= reg_read32(hcd->regs, HC_ATL_PTD_DONEMAP_REG);
1225
1226 handle_done_ptds(hcd);
1227
1228 irqret = IRQ_HANDLED;
1229 leave:
1230 spin_unlock(&priv->lock);
1231
1232 return irqret;
1233 }
1234
1235 /*
1236 * Workaround for problem described in chip errata 2:
1237 *
1238 * Sometimes interrupts are not generated when ATL (not INT?) completion occurs.
1239 * One solution suggested in the errata is to use SOF interrupts _instead_of_
1240 * ATL done interrupts (the "instead of" might be important since it seems
1241 * enabling ATL interrupts also causes the chip to sometimes - rarely - "forget"
1242 * to set the PTD's done bit in addition to not generating an interrupt!).
1243 *
1244 * So if we use SOF + ATL interrupts, we sometimes get stale PTDs since their
1245 * done bit is not being set. This is bad - it blocks the endpoint until reboot.
1246 *
1247 * If we use SOF interrupts only, we get latency between ptd completion and the
1248 * actual handling. This is very noticeable in testusb runs which takes several
1249 * minutes longer without ATL interrupts.
1250 *
1251 * A better solution is to run the code below every SLOT_CHECK_PERIOD ms. If it
1252 * finds active ATL slots which are older than SLOT_TIMEOUT ms, it checks the
1253 * slot's ACTIVE and VALID bits. If these are not set, the ptd is considered
1254 * completed and its done map bit is set.
1255 *
1256 * The values of SLOT_TIMEOUT and SLOT_CHECK_PERIOD have been arbitrarily chosen
1257 * not to cause too much lag when this HW bug occurs, while still hopefully
1258 * ensuring that the check does not falsely trigger.
1259 */
1260 #define SLOT_TIMEOUT 300
1261 #define SLOT_CHECK_PERIOD 200
1262 static struct timer_list errata2_timer;
1263
1264 static void errata2_function(unsigned long data)
1265 {
1266 struct usb_hcd *hcd = (struct usb_hcd *) data;
1267 struct isp1760_hcd *priv = hcd_to_priv(hcd);
1268 int slot;
1269 struct ptd ptd;
1270 unsigned long spinflags;
1271
1272 spin_lock_irqsave(&priv->lock, spinflags);
1273
1274 for (slot = 0; slot < 32; slot++)
1275 if (priv->atl_slots[slot].qh && time_after(jiffies,
1276 priv->atl_slots[slot].timestamp +
1277 msecs_to_jiffies(SLOT_TIMEOUT))) {
1278 ptd_read(hcd->regs, ATL_PTD_OFFSET, slot, &ptd);
1279 if (!FROM_DW0_VALID(ptd.dw0) &&
1280 !FROM_DW3_ACTIVE(ptd.dw3))
1281 priv->atl_done_map |= 1 << slot;
1282 }
1283
1284 if (priv->atl_done_map)
1285 handle_done_ptds(hcd);
1286
1287 spin_unlock_irqrestore(&priv->lock, spinflags);
1288
1289 errata2_timer.expires = jiffies + msecs_to_jiffies(SLOT_CHECK_PERIOD);
1290 add_timer(&errata2_timer);
1291 }
1292
1293 static int isp1760_run(struct usb_hcd *hcd)
1294 {
1295 int retval;
1296 u32 temp;
1297 u32 command;
1298 u32 chipid;
1299
1300 hcd->uses_new_polling = 1;
1301
1302 hcd->state = HC_STATE_RUNNING;
1303
1304 /* Set PTD interrupt AND & OR maps */
1305 reg_write32(hcd->regs, HC_ATL_IRQ_MASK_AND_REG, 0);
1306 reg_write32(hcd->regs, HC_ATL_IRQ_MASK_OR_REG, 0xffffffff);
1307 reg_write32(hcd->regs, HC_INT_IRQ_MASK_AND_REG, 0);
1308 reg_write32(hcd->regs, HC_INT_IRQ_MASK_OR_REG, 0xffffffff);
1309 reg_write32(hcd->regs, HC_ISO_IRQ_MASK_AND_REG, 0);
1310 reg_write32(hcd->regs, HC_ISO_IRQ_MASK_OR_REG, 0xffffffff);
1311 /* step 23 passed */
1312
1313 temp = reg_read32(hcd->regs, HC_HW_MODE_CTRL);
1314 reg_write32(hcd->regs, HC_HW_MODE_CTRL, temp | HW_GLOBAL_INTR_EN);
1315
1316 command = reg_read32(hcd->regs, HC_USBCMD);
1317 command &= ~(CMD_LRESET|CMD_RESET);
1318 command |= CMD_RUN;
1319 reg_write32(hcd->regs, HC_USBCMD, command);
1320
1321 retval = handshake(hcd, HC_USBCMD, CMD_RUN, CMD_RUN, 250 * 1000);
1322 if (retval)
1323 return retval;
1324
1325 /*
1326 * XXX
1327 * Spec says to write FLAG_CF as last config action, priv code grabs
1328 * the semaphore while doing so.
1329 */
1330 down_write(&ehci_cf_port_reset_rwsem);
1331 reg_write32(hcd->regs, HC_CONFIGFLAG, FLAG_CF);
1332
1333 retval = handshake(hcd, HC_CONFIGFLAG, FLAG_CF, FLAG_CF, 250 * 1000);
1334 up_write(&ehci_cf_port_reset_rwsem);
1335 if (retval)
1336 return retval;
1337
1338 setup_timer(&errata2_timer, errata2_function, (unsigned long)hcd);
1339 errata2_timer.expires = jiffies + msecs_to_jiffies(SLOT_CHECK_PERIOD);
1340 add_timer(&errata2_timer);
1341
1342 chipid = reg_read32(hcd->regs, HC_CHIP_ID_REG);
1343 dev_info(hcd->self.controller, "USB ISP %04x HW rev. %d started\n",
1344 chipid & 0xffff, chipid >> 16);
1345
1346 /* PTD Register Init Part 2, Step 28 */
1347
1348 /* Setup registers controlling PTD checking */
1349 reg_write32(hcd->regs, HC_ATL_PTD_LASTPTD_REG, 0x80000000);
1350 reg_write32(hcd->regs, HC_INT_PTD_LASTPTD_REG, 0x80000000);
1351 reg_write32(hcd->regs, HC_ISO_PTD_LASTPTD_REG, 0x00000001);
1352 reg_write32(hcd->regs, HC_ATL_PTD_SKIPMAP_REG, 0xffffffff);
1353 reg_write32(hcd->regs, HC_INT_PTD_SKIPMAP_REG, 0xffffffff);
1354 reg_write32(hcd->regs, HC_ISO_PTD_SKIPMAP_REG, 0xffffffff);
1355 reg_write32(hcd->regs, HC_BUFFER_STATUS_REG,
1356 ATL_BUF_FILL | INT_BUF_FILL);
1357
1358 /* GRR this is run-once init(), being done every time the HC starts.
1359 * So long as they're part of class devices, we can't do it init()
1360 * since the class device isn't created that early.
1361 */
1362 return 0;
1363 }
1364
1365 static int qtd_fill(struct isp1760_qtd *qtd, void *databuffer, size_t len)
1366 {
1367 qtd->data_buffer = databuffer;
1368
1369 if (len > MAX_PAYLOAD_SIZE)
1370 len = MAX_PAYLOAD_SIZE;
1371 qtd->length = len;
1372
1373 return qtd->length;
1374 }
1375
1376 static void qtd_list_free(struct list_head *qtd_list)
1377 {
1378 struct isp1760_qtd *qtd, *qtd_next;
1379
1380 list_for_each_entry_safe(qtd, qtd_next, qtd_list, qtd_list) {
1381 list_del(&qtd->qtd_list);
1382 qtd_free(qtd);
1383 }
1384 }
1385
1386 /*
1387 * Packetize urb->transfer_buffer into list of packets of size wMaxPacketSize.
1388 * Also calculate the PID type (SETUP/IN/OUT) for each packet.
1389 */
1390 #define max_packet(wMaxPacketSize) ((wMaxPacketSize) & 0x07ff)
1391 static void packetize_urb(struct usb_hcd *hcd,
1392 struct urb *urb, struct list_head *head, gfp_t flags)
1393 {
1394 struct isp1760_qtd *qtd;
1395 void *buf;
1396 int len, maxpacketsize;
1397 u8 packet_type;
1398
1399 /*
1400 * URBs map to sequences of QTDs: one logical transaction
1401 */
1402
1403 if (!urb->transfer_buffer && urb->transfer_buffer_length) {
1404 /* XXX This looks like usb storage / SCSI bug */
1405 dev_err(hcd->self.controller,
1406 "buf is null, dma is %08lx len is %d\n",
1407 (long unsigned)urb->transfer_dma,
1408 urb->transfer_buffer_length);
1409 WARN_ON(1);
1410 }
1411
1412 if (usb_pipein(urb->pipe))
1413 packet_type = IN_PID;
1414 else
1415 packet_type = OUT_PID;
1416
1417 if (usb_pipecontrol(urb->pipe)) {
1418 qtd = qtd_alloc(flags, urb, SETUP_PID);
1419 if (!qtd)
1420 goto cleanup;
1421 qtd_fill(qtd, urb->setup_packet, sizeof(struct usb_ctrlrequest));
1422 list_add_tail(&qtd->qtd_list, head);
1423
1424 /* for zero length DATA stages, STATUS is always IN */
1425 if (urb->transfer_buffer_length == 0)
1426 packet_type = IN_PID;
1427 }
1428
1429 maxpacketsize = max_packet(usb_maxpacket(urb->dev, urb->pipe,
1430 usb_pipeout(urb->pipe)));
1431
1432 /*
1433 * buffer gets wrapped in one or more qtds;
1434 * last one may be "short" (including zero len)
1435 * and may serve as a control status ack
1436 */
1437 buf = urb->transfer_buffer;
1438 len = urb->transfer_buffer_length;
1439
1440 for (;;) {
1441 int this_qtd_len;
1442
1443 qtd = qtd_alloc(flags, urb, packet_type);
1444 if (!qtd)
1445 goto cleanup;
1446 this_qtd_len = qtd_fill(qtd, buf, len);
1447 list_add_tail(&qtd->qtd_list, head);
1448
1449 len -= this_qtd_len;
1450 buf += this_qtd_len;
1451
1452 if (len <= 0)
1453 break;
1454 }
1455
1456 /*
1457 * control requests may need a terminating data "status" ack;
1458 * bulk ones may need a terminating short packet (zero length).
1459 */
1460 if (urb->transfer_buffer_length != 0) {
1461 int one_more = 0;
1462
1463 if (usb_pipecontrol(urb->pipe)) {
1464 one_more = 1;
1465 if (packet_type == IN_PID)
1466 packet_type = OUT_PID;
1467 else
1468 packet_type = IN_PID;
1469 } else if (usb_pipebulk(urb->pipe)
1470 && (urb->transfer_flags & URB_ZERO_PACKET)
1471 && !(urb->transfer_buffer_length %
1472 maxpacketsize)) {
1473 one_more = 1;
1474 }
1475 if (one_more) {
1476 qtd = qtd_alloc(flags, urb, packet_type);
1477 if (!qtd)
1478 goto cleanup;
1479
1480 /* never any data in such packets */
1481 qtd_fill(qtd, NULL, 0);
1482 list_add_tail(&qtd->qtd_list, head);
1483 }
1484 }
1485
1486 return;
1487
1488 cleanup:
1489 qtd_list_free(head);
1490 }
1491
1492 static int isp1760_urb_enqueue(struct usb_hcd *hcd, struct urb *urb,
1493 gfp_t mem_flags)
1494 {
1495 struct isp1760_hcd *priv = hcd_to_priv(hcd);
1496 struct list_head *ep_queue;
1497 struct isp1760_qh *qh, *qhit;
1498 unsigned long spinflags;
1499 LIST_HEAD(new_qtds);
1500 int retval;
1501 int qh_in_queue;
1502
1503 switch (usb_pipetype(urb->pipe)) {
1504 case PIPE_CONTROL:
1505 ep_queue = &priv->qh_list[QH_CONTROL];
1506 break;
1507 case PIPE_BULK:
1508 ep_queue = &priv->qh_list[QH_BULK];
1509 break;
1510 case PIPE_INTERRUPT:
1511 if (urb->interval < 0)
1512 return -EINVAL;
1513 /* FIXME: Check bandwidth */
1514 ep_queue = &priv->qh_list[QH_INTERRUPT];
1515 break;
1516 case PIPE_ISOCHRONOUS:
1517 dev_err(hcd->self.controller, "%s: isochronous USB packets "
1518 "not yet supported\n",
1519 __func__);
1520 return -EPIPE;
1521 default:
1522 dev_err(hcd->self.controller, "%s: unknown pipe type\n",
1523 __func__);
1524 return -EPIPE;
1525 }
1526
1527 if (usb_pipein(urb->pipe))
1528 urb->actual_length = 0;
1529
1530 packetize_urb(hcd, urb, &new_qtds, mem_flags);
1531 if (list_empty(&new_qtds))
1532 return -ENOMEM;
1533
1534 retval = 0;
1535 spin_lock_irqsave(&priv->lock, spinflags);
1536
1537 if (!test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags)) {
1538 retval = -ESHUTDOWN;
1539 qtd_list_free(&new_qtds);
1540 goto out;
1541 }
1542 retval = usb_hcd_link_urb_to_ep(hcd, urb);
1543 if (retval) {
1544 qtd_list_free(&new_qtds);
1545 goto out;
1546 }
1547
1548 qh = urb->ep->hcpriv;
1549 if (qh) {
1550 qh_in_queue = 0;
1551 list_for_each_entry(qhit, ep_queue, qh_list) {
1552 if (qhit == qh) {
1553 qh_in_queue = 1;
1554 break;
1555 }
1556 }
1557 if (!qh_in_queue)
1558 list_add_tail(&qh->qh_list, ep_queue);
1559 } else {
1560 qh = qh_alloc(GFP_ATOMIC);
1561 if (!qh) {
1562 retval = -ENOMEM;
1563 usb_hcd_unlink_urb_from_ep(hcd, urb);
1564 qtd_list_free(&new_qtds);
1565 goto out;
1566 }
1567 list_add_tail(&qh->qh_list, ep_queue);
1568 urb->ep->hcpriv = qh;
1569 }
1570
1571 list_splice_tail(&new_qtds, &qh->qtd_list);
1572 schedule_ptds(hcd);
1573
1574 out:
1575 spin_unlock_irqrestore(&priv->lock, spinflags);
1576 return retval;
1577 }
1578
1579 static void kill_transfer(struct usb_hcd *hcd, struct urb *urb,
1580 struct isp1760_qh *qh)
1581 {
1582 struct isp1760_hcd *priv = hcd_to_priv(hcd);
1583 int skip_map;
1584
1585 WARN_ON(qh->slot == -1);
1586
1587 /* We need to forcefully reclaim the slot since some transfers never
1588 return, e.g. interrupt transfers and NAKed bulk transfers. */
1589 if (usb_pipecontrol(urb->pipe) || usb_pipebulk(urb->pipe)) {
1590 skip_map = reg_read32(hcd->regs, HC_ATL_PTD_SKIPMAP_REG);
1591 skip_map |= (1 << qh->slot);
1592 reg_write32(hcd->regs, HC_ATL_PTD_SKIPMAP_REG, skip_map);
1593 priv->atl_slots[qh->slot].qh = NULL;
1594 priv->atl_slots[qh->slot].qtd = NULL;
1595 } else {
1596 skip_map = reg_read32(hcd->regs, HC_INT_PTD_SKIPMAP_REG);
1597 skip_map |= (1 << qh->slot);
1598 reg_write32(hcd->regs, HC_INT_PTD_SKIPMAP_REG, skip_map);
1599 priv->int_slots[qh->slot].qh = NULL;
1600 priv->int_slots[qh->slot].qtd = NULL;
1601 }
1602
1603 qh->slot = -1;
1604 }
1605
1606 /*
1607 * Retire the qtds beginning at 'qtd' and belonging all to the same urb, killing
1608 * any active transfer belonging to the urb in the process.
1609 */
1610 static void dequeue_urb_from_qtd(struct usb_hcd *hcd, struct isp1760_qh *qh,
1611 struct isp1760_qtd *qtd)
1612 {
1613 struct urb *urb;
1614 int urb_was_running;
1615
1616 urb = qtd->urb;
1617 urb_was_running = 0;
1618 list_for_each_entry_from(qtd, &qh->qtd_list, qtd_list) {
1619 if (qtd->urb != urb)
1620 break;
1621
1622 if (qtd->status >= QTD_XFER_STARTED)
1623 urb_was_running = 1;
1624 if (last_qtd_of_urb(qtd, qh) &&
1625 (qtd->status >= QTD_XFER_COMPLETE))
1626 urb_was_running = 0;
1627
1628 if (qtd->status == QTD_XFER_STARTED)
1629 kill_transfer(hcd, urb, qh);
1630 qtd->status = QTD_RETIRE;
1631 }
1632
1633 if ((urb->dev->speed != USB_SPEED_HIGH) && urb_was_running) {
1634 qh->tt_buffer_dirty = 1;
1635 if (usb_hub_clear_tt_buffer(urb))
1636 /* Clear failed; let's hope things work anyway */
1637 qh->tt_buffer_dirty = 0;
1638 }
1639 }
1640
1641 static int isp1760_urb_dequeue(struct usb_hcd *hcd, struct urb *urb,
1642 int status)
1643 {
1644 struct isp1760_hcd *priv = hcd_to_priv(hcd);
1645 unsigned long spinflags;
1646 struct isp1760_qh *qh;
1647 struct isp1760_qtd *qtd;
1648 int retval = 0;
1649
1650 spin_lock_irqsave(&priv->lock, spinflags);
1651 retval = usb_hcd_check_unlink_urb(hcd, urb, status);
1652 if (retval)
1653 goto out;
1654
1655 qh = urb->ep->hcpriv;
1656 if (!qh) {
1657 retval = -EINVAL;
1658 goto out;
1659 }
1660
1661 list_for_each_entry(qtd, &qh->qtd_list, qtd_list)
1662 if (qtd->urb == urb) {
1663 dequeue_urb_from_qtd(hcd, qh, qtd);
1664 list_move(&qtd->qtd_list, &qh->qtd_list);
1665 break;
1666 }
1667
1668 urb->status = status;
1669 schedule_ptds(hcd);
1670
1671 out:
1672 spin_unlock_irqrestore(&priv->lock, spinflags);
1673 return retval;
1674 }
1675
1676 static void isp1760_endpoint_disable(struct usb_hcd *hcd,
1677 struct usb_host_endpoint *ep)
1678 {
1679 struct isp1760_hcd *priv = hcd_to_priv(hcd);
1680 unsigned long spinflags;
1681 struct isp1760_qh *qh, *qh_iter;
1682 int i;
1683
1684 spin_lock_irqsave(&priv->lock, spinflags);
1685
1686 qh = ep->hcpriv;
1687 if (!qh)
1688 goto out;
1689
1690 WARN_ON(!list_empty(&qh->qtd_list));
1691
1692 for (i = 0; i < QH_END; i++)
1693 list_for_each_entry(qh_iter, &priv->qh_list[i], qh_list)
1694 if (qh_iter == qh) {
1695 list_del(&qh_iter->qh_list);
1696 i = QH_END;
1697 break;
1698 }
1699 qh_free(qh);
1700 ep->hcpriv = NULL;
1701
1702 schedule_ptds(hcd);
1703
1704 out:
1705 spin_unlock_irqrestore(&priv->lock, spinflags);
1706 }
1707
1708 static int isp1760_hub_status_data(struct usb_hcd *hcd, char *buf)
1709 {
1710 struct isp1760_hcd *priv = hcd_to_priv(hcd);
1711 u32 temp, status = 0;
1712 u32 mask;
1713 int retval = 1;
1714 unsigned long flags;
1715
1716 /* if !PM, root hub timers won't get shut down ... */
1717 if (!HC_IS_RUNNING(hcd->state))
1718 return 0;
1719
1720 /* init status to no-changes */
1721 buf[0] = 0;
1722 mask = PORT_CSC;
1723
1724 spin_lock_irqsave(&priv->lock, flags);
1725 temp = reg_read32(hcd->regs, HC_PORTSC1);
1726
1727 if (temp & PORT_OWNER) {
1728 if (temp & PORT_CSC) {
1729 temp &= ~PORT_CSC;
1730 reg_write32(hcd->regs, HC_PORTSC1, temp);
1731 goto done;
1732 }
1733 }
1734
1735 /*
1736 * Return status information even for ports with OWNER set.
1737 * Otherwise hub_wq wouldn't see the disconnect event when a
1738 * high-speed device is switched over to the companion
1739 * controller by the user.
1740 */
1741
1742 if ((temp & mask) != 0
1743 || ((temp & PORT_RESUME) != 0
1744 && time_after_eq(jiffies,
1745 priv->reset_done))) {
1746 buf [0] |= 1 << (0 + 1);
1747 status = STS_PCD;
1748 }
1749 /* FIXME autosuspend idle root hubs */
1750 done:
1751 spin_unlock_irqrestore(&priv->lock, flags);
1752 return status ? retval : 0;
1753 }
1754
1755 static void isp1760_hub_descriptor(struct isp1760_hcd *priv,
1756 struct usb_hub_descriptor *desc)
1757 {
1758 int ports = HCS_N_PORTS(priv->hcs_params);
1759 u16 temp;
1760
1761 desc->bDescriptorType = USB_DT_HUB;
1762 /* priv 1.0, 2.3.9 says 20ms max */
1763 desc->bPwrOn2PwrGood = 10;
1764 desc->bHubContrCurrent = 0;
1765
1766 desc->bNbrPorts = ports;
1767 temp = 1 + (ports / 8);
1768 desc->bDescLength = 7 + 2 * temp;
1769
1770 /* ports removable, and usb 1.0 legacy PortPwrCtrlMask */
1771 memset(&desc->u.hs.DeviceRemovable[0], 0, temp);
1772 memset(&desc->u.hs.DeviceRemovable[temp], 0xff, temp);
1773
1774 /* per-port overcurrent reporting */
1775 temp = HUB_CHAR_INDV_PORT_OCPM;
1776 if (HCS_PPC(priv->hcs_params))
1777 /* per-port power control */
1778 temp |= HUB_CHAR_INDV_PORT_LPSM;
1779 else
1780 /* no power switching */
1781 temp |= HUB_CHAR_NO_LPSM;
1782 desc->wHubCharacteristics = cpu_to_le16(temp);
1783 }
1784
1785 #define PORT_WAKE_BITS (PORT_WKOC_E|PORT_WKDISC_E|PORT_WKCONN_E)
1786
1787 static int check_reset_complete(struct usb_hcd *hcd, int index,
1788 int port_status)
1789 {
1790 if (!(port_status & PORT_CONNECT))
1791 return port_status;
1792
1793 /* if reset finished and it's still not enabled -- handoff */
1794 if (!(port_status & PORT_PE)) {
1795
1796 dev_info(hcd->self.controller,
1797 "port %d full speed --> companion\n",
1798 index + 1);
1799
1800 port_status |= PORT_OWNER;
1801 port_status &= ~PORT_RWC_BITS;
1802 reg_write32(hcd->regs, HC_PORTSC1, port_status);
1803
1804 } else
1805 dev_info(hcd->self.controller, "port %d high speed\n",
1806 index + 1);
1807
1808 return port_status;
1809 }
1810
1811 static int isp1760_hub_control(struct usb_hcd *hcd, u16 typeReq,
1812 u16 wValue, u16 wIndex, char *buf, u16 wLength)
1813 {
1814 struct isp1760_hcd *priv = hcd_to_priv(hcd);
1815 int ports = HCS_N_PORTS(priv->hcs_params);
1816 u32 temp, status;
1817 unsigned long flags;
1818 int retval = 0;
1819 unsigned selector;
1820
1821 /*
1822 * FIXME: support SetPortFeatures USB_PORT_FEAT_INDICATOR.
1823 * HCS_INDICATOR may say we can change LEDs to off/amber/green.
1824 * (track current state ourselves) ... blink for diagnostics,
1825 * power, "this is the one", etc. EHCI spec supports this.
1826 */
1827
1828 spin_lock_irqsave(&priv->lock, flags);
1829 switch (typeReq) {
1830 case ClearHubFeature:
1831 switch (wValue) {
1832 case C_HUB_LOCAL_POWER:
1833 case C_HUB_OVER_CURRENT:
1834 /* no hub-wide feature/status flags */
1835 break;
1836 default:
1837 goto error;
1838 }
1839 break;
1840 case ClearPortFeature:
1841 if (!wIndex || wIndex > ports)
1842 goto error;
1843 wIndex--;
1844 temp = reg_read32(hcd->regs, HC_PORTSC1);
1845
1846 /*
1847 * Even if OWNER is set, so the port is owned by the
1848 * companion controller, hub_wq needs to be able to clear
1849 * the port-change status bits (especially
1850 * USB_PORT_STAT_C_CONNECTION).
1851 */
1852
1853 switch (wValue) {
1854 case USB_PORT_FEAT_ENABLE:
1855 reg_write32(hcd->regs, HC_PORTSC1, temp & ~PORT_PE);
1856 break;
1857 case USB_PORT_FEAT_C_ENABLE:
1858 /* XXX error? */
1859 break;
1860 case USB_PORT_FEAT_SUSPEND:
1861 if (temp & PORT_RESET)
1862 goto error;
1863
1864 if (temp & PORT_SUSPEND) {
1865 if ((temp & PORT_PE) == 0)
1866 goto error;
1867 /* resume signaling for 20 msec */
1868 temp &= ~(PORT_RWC_BITS);
1869 reg_write32(hcd->regs, HC_PORTSC1,
1870 temp | PORT_RESUME);
1871 priv->reset_done = jiffies +
1872 msecs_to_jiffies(USB_RESUME_TIMEOUT);
1873 }
1874 break;
1875 case USB_PORT_FEAT_C_SUSPEND:
1876 /* we auto-clear this feature */
1877 break;
1878 case USB_PORT_FEAT_POWER:
1879 if (HCS_PPC(priv->hcs_params))
1880 reg_write32(hcd->regs, HC_PORTSC1,
1881 temp & ~PORT_POWER);
1882 break;
1883 case USB_PORT_FEAT_C_CONNECTION:
1884 reg_write32(hcd->regs, HC_PORTSC1, temp | PORT_CSC);
1885 break;
1886 case USB_PORT_FEAT_C_OVER_CURRENT:
1887 /* XXX error ?*/
1888 break;
1889 case USB_PORT_FEAT_C_RESET:
1890 /* GetPortStatus clears reset */
1891 break;
1892 default:
1893 goto error;
1894 }
1895 reg_read32(hcd->regs, HC_USBCMD);
1896 break;
1897 case GetHubDescriptor:
1898 isp1760_hub_descriptor(priv, (struct usb_hub_descriptor *)
1899 buf);
1900 break;
1901 case GetHubStatus:
1902 /* no hub-wide feature/status flags */
1903 memset(buf, 0, 4);
1904 break;
1905 case GetPortStatus:
1906 if (!wIndex || wIndex > ports)
1907 goto error;
1908 wIndex--;
1909 status = 0;
1910 temp = reg_read32(hcd->regs, HC_PORTSC1);
1911
1912 /* wPortChange bits */
1913 if (temp & PORT_CSC)
1914 status |= USB_PORT_STAT_C_CONNECTION << 16;
1915
1916
1917 /* whoever resumes must GetPortStatus to complete it!! */
1918 if (temp & PORT_RESUME) {
1919 dev_err(hcd->self.controller, "Port resume should be skipped.\n");
1920
1921 /* Remote Wakeup received? */
1922 if (!priv->reset_done) {
1923 /* resume signaling for 20 msec */
1924 priv->reset_done = jiffies
1925 + msecs_to_jiffies(20);
1926 /* check the port again */
1927 mod_timer(&hcd->rh_timer, priv->reset_done);
1928 }
1929
1930 /* resume completed? */
1931 else if (time_after_eq(jiffies,
1932 priv->reset_done)) {
1933 status |= USB_PORT_STAT_C_SUSPEND << 16;
1934 priv->reset_done = 0;
1935
1936 /* stop resume signaling */
1937 temp = reg_read32(hcd->regs, HC_PORTSC1);
1938 reg_write32(hcd->regs, HC_PORTSC1,
1939 temp & ~(PORT_RWC_BITS | PORT_RESUME));
1940 retval = handshake(hcd, HC_PORTSC1,
1941 PORT_RESUME, 0, 2000 /* 2msec */);
1942 if (retval != 0) {
1943 dev_err(hcd->self.controller,
1944 "port %d resume error %d\n",
1945 wIndex + 1, retval);
1946 goto error;
1947 }
1948 temp &= ~(PORT_SUSPEND|PORT_RESUME|(3<<10));
1949 }
1950 }
1951
1952 /* whoever resets must GetPortStatus to complete it!! */
1953 if ((temp & PORT_RESET)
1954 && time_after_eq(jiffies,
1955 priv->reset_done)) {
1956 status |= USB_PORT_STAT_C_RESET << 16;
1957 priv->reset_done = 0;
1958
1959 /* force reset to complete */
1960 reg_write32(hcd->regs, HC_PORTSC1, temp & ~PORT_RESET);
1961 /* REVISIT: some hardware needs 550+ usec to clear
1962 * this bit; seems too long to spin routinely...
1963 */
1964 retval = handshake(hcd, HC_PORTSC1,
1965 PORT_RESET, 0, 750);
1966 if (retval != 0) {
1967 dev_err(hcd->self.controller, "port %d reset error %d\n",
1968 wIndex + 1, retval);
1969 goto error;
1970 }
1971
1972 /* see what we found out */
1973 temp = check_reset_complete(hcd, wIndex,
1974 reg_read32(hcd->regs, HC_PORTSC1));
1975 }
1976 /*
1977 * Even if OWNER is set, there's no harm letting hub_wq
1978 * see the wPortStatus values (they should all be 0 except
1979 * for PORT_POWER anyway).
1980 */
1981
1982 if (temp & PORT_OWNER)
1983 dev_err(hcd->self.controller, "PORT_OWNER is set\n");
1984
1985 if (temp & PORT_CONNECT) {
1986 status |= USB_PORT_STAT_CONNECTION;
1987 /* status may be from integrated TT */
1988 status |= USB_PORT_STAT_HIGH_SPEED;
1989 }
1990 if (temp & PORT_PE)
1991 status |= USB_PORT_STAT_ENABLE;
1992 if (temp & (PORT_SUSPEND|PORT_RESUME))
1993 status |= USB_PORT_STAT_SUSPEND;
1994 if (temp & PORT_RESET)
1995 status |= USB_PORT_STAT_RESET;
1996 if (temp & PORT_POWER)
1997 status |= USB_PORT_STAT_POWER;
1998
1999 put_unaligned(cpu_to_le32(status), (__le32 *) buf);
2000 break;
2001 case SetHubFeature:
2002 switch (wValue) {
2003 case C_HUB_LOCAL_POWER:
2004 case C_HUB_OVER_CURRENT:
2005 /* no hub-wide feature/status flags */
2006 break;
2007 default:
2008 goto error;
2009 }
2010 break;
2011 case SetPortFeature:
2012 selector = wIndex >> 8;
2013 wIndex &= 0xff;
2014 if (!wIndex || wIndex > ports)
2015 goto error;
2016 wIndex--;
2017 temp = reg_read32(hcd->regs, HC_PORTSC1);
2018 if (temp & PORT_OWNER)
2019 break;
2020
2021 /* temp &= ~PORT_RWC_BITS; */
2022 switch (wValue) {
2023 case USB_PORT_FEAT_ENABLE:
2024 reg_write32(hcd->regs, HC_PORTSC1, temp | PORT_PE);
2025 break;
2026
2027 case USB_PORT_FEAT_SUSPEND:
2028 if ((temp & PORT_PE) == 0
2029 || (temp & PORT_RESET) != 0)
2030 goto error;
2031
2032 reg_write32(hcd->regs, HC_PORTSC1, temp | PORT_SUSPEND);
2033 break;
2034 case USB_PORT_FEAT_POWER:
2035 if (HCS_PPC(priv->hcs_params))
2036 reg_write32(hcd->regs, HC_PORTSC1,
2037 temp | PORT_POWER);
2038 break;
2039 case USB_PORT_FEAT_RESET:
2040 if (temp & PORT_RESUME)
2041 goto error;
2042 /* line status bits may report this as low speed,
2043 * which can be fine if this root hub has a
2044 * transaction translator built in.
2045 */
2046 if ((temp & (PORT_PE|PORT_CONNECT)) == PORT_CONNECT
2047 && PORT_USB11(temp)) {
2048 temp |= PORT_OWNER;
2049 } else {
2050 temp |= PORT_RESET;
2051 temp &= ~PORT_PE;
2052
2053 /*
2054 * caller must wait, then call GetPortStatus
2055 * usb 2.0 spec says 50 ms resets on root
2056 */
2057 priv->reset_done = jiffies +
2058 msecs_to_jiffies(50);
2059 }
2060 reg_write32(hcd->regs, HC_PORTSC1, temp);
2061 break;
2062 default:
2063 goto error;
2064 }
2065 reg_read32(hcd->regs, HC_USBCMD);
2066 break;
2067
2068 default:
2069 error:
2070 /* "stall" on error */
2071 retval = -EPIPE;
2072 }
2073 spin_unlock_irqrestore(&priv->lock, flags);
2074 return retval;
2075 }
2076
2077 static int isp1760_get_frame(struct usb_hcd *hcd)
2078 {
2079 struct isp1760_hcd *priv = hcd_to_priv(hcd);
2080 u32 fr;
2081
2082 fr = reg_read32(hcd->regs, HC_FRINDEX);
2083 return (fr >> 3) % priv->periodic_size;
2084 }
2085
2086 static void isp1760_stop(struct usb_hcd *hcd)
2087 {
2088 struct isp1760_hcd *priv = hcd_to_priv(hcd);
2089 u32 temp;
2090
2091 del_timer(&errata2_timer);
2092
2093 isp1760_hub_control(hcd, ClearPortFeature, USB_PORT_FEAT_POWER, 1,
2094 NULL, 0);
2095 mdelay(20);
2096
2097 spin_lock_irq(&priv->lock);
2098 ehci_reset(hcd);
2099 /* Disable IRQ */
2100 temp = reg_read32(hcd->regs, HC_HW_MODE_CTRL);
2101 reg_write32(hcd->regs, HC_HW_MODE_CTRL, temp &= ~HW_GLOBAL_INTR_EN);
2102 spin_unlock_irq(&priv->lock);
2103
2104 reg_write32(hcd->regs, HC_CONFIGFLAG, 0);
2105 }
2106
2107 static void isp1760_shutdown(struct usb_hcd *hcd)
2108 {
2109 u32 command, temp;
2110
2111 isp1760_stop(hcd);
2112 temp = reg_read32(hcd->regs, HC_HW_MODE_CTRL);
2113 reg_write32(hcd->regs, HC_HW_MODE_CTRL, temp &= ~HW_GLOBAL_INTR_EN);
2114
2115 command = reg_read32(hcd->regs, HC_USBCMD);
2116 command &= ~CMD_RUN;
2117 reg_write32(hcd->regs, HC_USBCMD, command);
2118 }
2119
2120 static void isp1760_clear_tt_buffer_complete(struct usb_hcd *hcd,
2121 struct usb_host_endpoint *ep)
2122 {
2123 struct isp1760_hcd *priv = hcd_to_priv(hcd);
2124 struct isp1760_qh *qh = ep->hcpriv;
2125 unsigned long spinflags;
2126
2127 if (!qh)
2128 return;
2129
2130 spin_lock_irqsave(&priv->lock, spinflags);
2131 qh->tt_buffer_dirty = 0;
2132 schedule_ptds(hcd);
2133 spin_unlock_irqrestore(&priv->lock, spinflags);
2134 }
2135
2136
2137 static const struct hc_driver isp1760_hc_driver = {
2138 .description = "isp1760-hcd",
2139 .product_desc = "NXP ISP1760 USB Host Controller",
2140 .hcd_priv_size = sizeof(struct isp1760_hcd *),
2141 .irq = isp1760_irq,
2142 .flags = HCD_MEMORY | HCD_USB2,
2143 .reset = isp1760_hc_setup,
2144 .start = isp1760_run,
2145 .stop = isp1760_stop,
2146 .shutdown = isp1760_shutdown,
2147 .urb_enqueue = isp1760_urb_enqueue,
2148 .urb_dequeue = isp1760_urb_dequeue,
2149 .endpoint_disable = isp1760_endpoint_disable,
2150 .get_frame_number = isp1760_get_frame,
2151 .hub_status_data = isp1760_hub_status_data,
2152 .hub_control = isp1760_hub_control,
2153 .clear_tt_buffer_complete = isp1760_clear_tt_buffer_complete,
2154 };
2155
2156 int __init isp1760_init_kmem_once(void)
2157 {
2158 urb_listitem_cachep = kmem_cache_create("isp1760_urb_listitem",
2159 sizeof(struct urb_listitem), 0, SLAB_TEMPORARY |
2160 SLAB_MEM_SPREAD, NULL);
2161
2162 if (!urb_listitem_cachep)
2163 return -ENOMEM;
2164
2165 qtd_cachep = kmem_cache_create("isp1760_qtd",
2166 sizeof(struct isp1760_qtd), 0, SLAB_TEMPORARY |
2167 SLAB_MEM_SPREAD, NULL);
2168
2169 if (!qtd_cachep)
2170 return -ENOMEM;
2171
2172 qh_cachep = kmem_cache_create("isp1760_qh", sizeof(struct isp1760_qh),
2173 0, SLAB_TEMPORARY | SLAB_MEM_SPREAD, NULL);
2174
2175 if (!qh_cachep) {
2176 kmem_cache_destroy(qtd_cachep);
2177 return -ENOMEM;
2178 }
2179
2180 return 0;
2181 }
2182
2183 void isp1760_deinit_kmem_cache(void)
2184 {
2185 kmem_cache_destroy(qtd_cachep);
2186 kmem_cache_destroy(qh_cachep);
2187 kmem_cache_destroy(urb_listitem_cachep);
2188 }
2189
2190 int isp1760_hcd_register(struct isp1760_hcd *priv, void __iomem *regs,
2191 struct resource *mem, int irq, unsigned long irqflags,
2192 struct device *dev)
2193 {
2194 struct usb_hcd *hcd;
2195 int ret;
2196
2197 hcd = usb_create_hcd(&isp1760_hc_driver, dev, dev_name(dev));
2198 if (!hcd)
2199 return -ENOMEM;
2200
2201 *(struct isp1760_hcd **)hcd->hcd_priv = priv;
2202
2203 priv->hcd = hcd;
2204
2205 init_memory(priv);
2206
2207 hcd->irq = irq;
2208 hcd->regs = regs;
2209 hcd->rsrc_start = mem->start;
2210 hcd->rsrc_len = resource_size(mem);
2211
2212 /* This driver doesn't support wakeup requests */
2213 hcd->cant_recv_wakeups = 1;
2214
2215 ret = usb_add_hcd(hcd, irq, irqflags);
2216 if (ret)
2217 goto error;
2218
2219 device_wakeup_enable(hcd->self.controller);
2220
2221 return 0;
2222
2223 error:
2224 usb_put_hcd(hcd);
2225 return ret;
2226 }
2227
2228 void isp1760_hcd_unregister(struct isp1760_hcd *priv)
2229 {
2230 if (!priv->hcd)
2231 return;
2232
2233 usb_remove_hcd(priv->hcd);
2234 usb_put_hcd(priv->hcd);
2235 }
Linux with added FPC-III support