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Add linux-next specific files for 20110421
[linux-2.6/next.git] / drivers / usb / host / isp1760-hcd.c
blob795345ad45e62881fb8e28a1abce639a3088cac8
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/usb/hcd.h>
18 #include <linux/debugfs.h>
19 #include <linux/uaccess.h>
20 #include <linux/io.h>
21 #include <linux/mm.h>
22 #include <asm/unaligned.h>
23 #include <asm/cacheflush.h>
24
25 #include "isp1760-hcd.h"
26
27 static struct kmem_cache *qtd_cachep;
28 static struct kmem_cache *qh_cachep;
29
30 struct isp1760_hcd {
31 u32 hcs_params;
32 spinlock_t lock;
33 struct inter_packet_info atl_ints[32];
34 struct inter_packet_info int_ints[32];
35 struct memory_chunk memory_pool[BLOCKS];
36 u32 atl_queued;
37
38 /* periodic schedule support */
39 #define DEFAULT_I_TDPS 1024
40 unsigned periodic_size;
41 unsigned i_thresh;
42 unsigned long reset_done;
43 unsigned long next_statechange;
44 unsigned int devflags;
45 };
46
47 static inline struct isp1760_hcd *hcd_to_priv(struct usb_hcd *hcd)
48 {
49 return (struct isp1760_hcd *) (hcd->hcd_priv);
50 }
51
52 /* Section 2.2 Host Controller Capability Registers */
53 #define HC_LENGTH(p) (((p)>>00)&0x00ff) /* bits 7:0 */
54 #define HC_VERSION(p) (((p)>>16)&0xffff) /* bits 31:16 */
55 #define HCS_INDICATOR(p) ((p)&(1 << 16)) /* true: has port indicators */
56 #define HCS_PPC(p) ((p)&(1 << 4)) /* true: port power control */
57 #define HCS_N_PORTS(p) (((p)>>0)&0xf) /* bits 3:0, ports on HC */
58 #define HCC_ISOC_CACHE(p) ((p)&(1 << 7)) /* true: can cache isoc frame */
59 #define HCC_ISOC_THRES(p) (((p)>>4)&0x7) /* bits 6:4, uframes cached */
60
61 /* Section 2.3 Host Controller Operational Registers */
62 #define CMD_LRESET (1<<7) /* partial reset (no ports, etc) */
63 #define CMD_RESET (1<<1) /* reset HC not bus */
64 #define CMD_RUN (1<<0) /* start/stop HC */
65 #define STS_PCD (1<<2) /* port change detect */
66 #define FLAG_CF (1<<0) /* true: we'll support "high speed" */
67
68 #define PORT_OWNER (1<<13) /* true: companion hc owns this port */
69 #define PORT_POWER (1<<12) /* true: has power (see PPC) */
70 #define PORT_USB11(x) (((x) & (3 << 10)) == (1 << 10)) /* USB 1.1 device */
71 #define PORT_RESET (1<<8) /* reset port */
72 #define PORT_SUSPEND (1<<7) /* suspend port */
73 #define PORT_RESUME (1<<6) /* resume it */
74 #define PORT_PE (1<<2) /* port enable */
75 #define PORT_CSC (1<<1) /* connect status change */
76 #define PORT_CONNECT (1<<0) /* device connected */
77 #define PORT_RWC_BITS (PORT_CSC)
78
79 struct isp1760_qtd {
80 u8 packet_type;
81 void *data_buffer;
82 u32 payload_addr;
83
84 /* the rest is HCD-private */
85 struct list_head qtd_list;
86 struct urb *urb;
87 size_t length;
88
89 /* isp special*/
90 u32 status;
91 #define URB_ENQUEUED (1 << 1)
92 };
93
94 struct isp1760_qh {
95 /* first part defined by EHCI spec */
96 struct list_head qtd_list;
97
98 u32 toggle;
99 u32 ping;
100 };
101
102 /*
103 * Access functions for isp176x registers (addresses 0..0x03FF).
104 */
105 static u32 reg_read32(void __iomem *base, u32 reg)
106 {
107 return readl(base + reg);
108 }
109
110 static void reg_write32(void __iomem *base, u32 reg, u32 val)
111 {
112 writel(val, base + reg);
113 }
114
115 /*
116 * Access functions for isp176x memory (offset >= 0x0400).
117 *
118 * bank_reads8() reads memory locations prefetched by an earlier write to
119 * HC_MEMORY_REG (see isp176x datasheet). Unless you want to do fancy multi-
120 * bank optimizations, you should use the more generic mem_reads8() below.
121 *
122 * For access to ptd memory, use the specialized ptd_read() and ptd_write()
123 * below.
124 *
125 * These functions 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 bank_reads8(void __iomem *src_base, u32 src_offset, u32 bank_addr,
129 __u32 *dst, u32 bytes)
130 {
131 __u32 __iomem *src;
132 u32 val;
133 __u8 *src_byteptr;
134 __u8 *dst_byteptr;
135
136 src = src_base + (bank_addr | src_offset);
137
138 if (src_offset < PAYLOAD_OFFSET) {
139 while (bytes >= 4) {
140 *dst = le32_to_cpu(__raw_readl(src));
141 bytes -= 4;
142 src++;
143 dst++;
144 }
145 } else {
146 while (bytes >= 4) {
147 *dst = __raw_readl(src);
148 bytes -= 4;
149 src++;
150 dst++;
151 }
152 }
153
154 if (!bytes)
155 return;
156
157 /* in case we have 3, 2 or 1 by left. The dst buffer may not be fully
158 * allocated.
159 */
160 if (src_offset < PAYLOAD_OFFSET)
161 val = le32_to_cpu(__raw_readl(src));
162 else
163 val = __raw_readl(src);
164
165 dst_byteptr = (void *) dst;
166 src_byteptr = (void *) &val;
167 while (bytes > 0) {
168 *dst_byteptr = *src_byteptr;
169 dst_byteptr++;
170 src_byteptr++;
171 bytes--;
172 }
173 }
174
175 static void mem_reads8(void __iomem *src_base, u32 src_offset, void *dst,
176 u32 bytes)
177 {
178 reg_write32(src_base, HC_MEMORY_REG, src_offset + ISP_BANK(0));
179 ndelay(90);
180 bank_reads8(src_base, src_offset, ISP_BANK(0), dst, bytes);
181 }
182
183 static void mem_writes8(void __iomem *dst_base, u32 dst_offset,
184 __u32 const *src, u32 bytes)
185 {
186 __u32 __iomem *dst;
187
188 dst = dst_base + dst_offset;
189
190 if (dst_offset < PAYLOAD_OFFSET) {
191 while (bytes >= 4) {
192 __raw_writel(cpu_to_le32(*src), dst);
193 bytes -= 4;
194 src++;
195 dst++;
196 }
197 } else {
198 while (bytes >= 4) {
199 __raw_writel(*src, dst);
200 bytes -= 4;
201 src++;
202 dst++;
203 }
204 }
205
206 if (!bytes)
207 return;
208 /* in case we have 3, 2 or 1 bytes left. The buffer is allocated and the
209 * extra bytes should not be read by the HW.
210 */
211
212 if (dst_offset < PAYLOAD_OFFSET)
213 __raw_writel(cpu_to_le32(*src), dst);
214 else
215 __raw_writel(*src, dst);
216 }
217
218 /*
219 * Read and write ptds. 'ptd_offset' should be one of ISO_PTD_OFFSET,
220 * INT_PTD_OFFSET, and ATL_PTD_OFFSET. 'slot' should be less than 32.
221 */
222 static void ptd_read(void __iomem *base, u32 ptd_offset, u32 slot,
223 struct ptd *ptd)
224 {
225 reg_write32(base, HC_MEMORY_REG,
226 ISP_BANK(0) + ptd_offset + slot*sizeof(*ptd));
227 ndelay(90);
228 bank_reads8(base, ptd_offset + slot*sizeof(*ptd), ISP_BANK(0),
229 (void *) ptd, sizeof(*ptd));
230 }
231
232 static void ptd_write(void __iomem *base, u32 ptd_offset, u32 slot,
233 struct ptd *ptd)
234 {
235 mem_writes8(base, ptd_offset + slot*sizeof(*ptd) + sizeof(ptd->dw0),
236 &ptd->dw1, 7*sizeof(ptd->dw1));
237 /* Make sure dw0 gets written last (after other dw's and after payload)
238 since it contains the enable bit */
239 wmb();
240 mem_writes8(base, ptd_offset + slot*sizeof(*ptd), &ptd->dw0,
241 sizeof(ptd->dw0));
242 }
243
244
245 /* memory management of the 60kb on the chip from 0x1000 to 0xffff */
246 static void init_memory(struct isp1760_hcd *priv)
247 {
248 int i, curr;
249 u32 payload_addr;
250
251 payload_addr = PAYLOAD_OFFSET;
252 for (i = 0; i < BLOCK_1_NUM; i++) {
253 priv->memory_pool[i].start = payload_addr;
254 priv->memory_pool[i].size = BLOCK_1_SIZE;
255 priv->memory_pool[i].free = 1;
256 payload_addr += priv->memory_pool[i].size;
257 }
258
259 curr = i;
260 for (i = 0; i < BLOCK_2_NUM; i++) {
261 priv->memory_pool[curr + i].start = payload_addr;
262 priv->memory_pool[curr + i].size = BLOCK_2_SIZE;
263 priv->memory_pool[curr + i].free = 1;
264 payload_addr += priv->memory_pool[curr + i].size;
265 }
266
267 curr = i;
268 for (i = 0; i < BLOCK_3_NUM; i++) {
269 priv->memory_pool[curr + i].start = payload_addr;
270 priv->memory_pool[curr + i].size = BLOCK_3_SIZE;
271 priv->memory_pool[curr + i].free = 1;
272 payload_addr += priv->memory_pool[curr + i].size;
273 }
274
275 BUG_ON(payload_addr - priv->memory_pool[0].start > PAYLOAD_AREA_SIZE);
276 }
277
278 static void alloc_mem(struct usb_hcd *hcd, struct isp1760_qtd *qtd)
279 {
280 struct isp1760_hcd *priv = hcd_to_priv(hcd);
281 int i;
282
283 BUG_ON(qtd->payload_addr);
284
285 if (!qtd->length)
286 return;
287
288 for (i = 0; i < BLOCKS; i++) {
289 if (priv->memory_pool[i].size >= qtd->length &&
290 priv->memory_pool[i].free) {
291 priv->memory_pool[i].free = 0;
292 qtd->payload_addr = priv->memory_pool[i].start;
293 return;
294 }
295 }
296
297 dev_err(hcd->self.controller,
298 "%s: Cannot allocate %zu bytes of memory\n"
299 "Current memory map:\n",
300 __func__, qtd->length);
301 for (i = 0; i < BLOCKS; i++) {
302 dev_err(hcd->self.controller, "Pool %2d size %4d status: %d\n",
303 i, priv->memory_pool[i].size,
304 priv->memory_pool[i].free);
305 }
306 /* XXX maybe -ENOMEM could be possible */
307 BUG();
308 return;
309 }
310
311 static void free_mem(struct usb_hcd *hcd, struct isp1760_qtd *qtd)
312 {
313 struct isp1760_hcd *priv = hcd_to_priv(hcd);
314 int i;
315
316 if (!qtd->payload_addr)
317 return;
318
319 for (i = 0; i < BLOCKS; i++) {
320 if (priv->memory_pool[i].start == qtd->payload_addr) {
321 BUG_ON(priv->memory_pool[i].free);
322 priv->memory_pool[i].free = 1;
323 qtd->payload_addr = 0;
324 return;
325 }
326 }
327
328 dev_err(hcd->self.controller, "%s: Invalid pointer: %08x\n",
329 __func__, qtd->payload_addr);
330 BUG();
331 }
332
333 static void isp1760_init_regs(struct usb_hcd *hcd)
334 {
335 reg_write32(hcd->regs, HC_BUFFER_STATUS_REG, 0);
336 reg_write32(hcd->regs, HC_ATL_PTD_SKIPMAP_REG, NO_TRANSFER_ACTIVE);
337 reg_write32(hcd->regs, HC_INT_PTD_SKIPMAP_REG, NO_TRANSFER_ACTIVE);
338 reg_write32(hcd->regs, HC_ISO_PTD_SKIPMAP_REG, NO_TRANSFER_ACTIVE);
339
340 reg_write32(hcd->regs, HC_ATL_PTD_DONEMAP_REG, ~NO_TRANSFER_ACTIVE);
341 reg_write32(hcd->regs, HC_INT_PTD_DONEMAP_REG, ~NO_TRANSFER_ACTIVE);
342 reg_write32(hcd->regs, HC_ISO_PTD_DONEMAP_REG, ~NO_TRANSFER_ACTIVE);
343 }
344
345 static int handshake(struct usb_hcd *hcd, u32 reg,
346 u32 mask, u32 done, int usec)
347 {
348 u32 result;
349
350 do {
351 result = reg_read32(hcd->regs, reg);
352 if (result == ~0)
353 return -ENODEV;
354 result &= mask;
355 if (result == done)
356 return 0;
357 udelay(1);
358 usec--;
359 } while (usec > 0);
360 return -ETIMEDOUT;
361 }
362
363 /* reset a non-running (STS_HALT == 1) controller */
364 static int ehci_reset(struct usb_hcd *hcd)
365 {
366 int retval;
367 struct isp1760_hcd *priv = hcd_to_priv(hcd);
368
369 u32 command = reg_read32(hcd->regs, HC_USBCMD);
370
371 command |= CMD_RESET;
372 reg_write32(hcd->regs, HC_USBCMD, command);
373 hcd->state = HC_STATE_HALT;
374 priv->next_statechange = jiffies;
375 retval = handshake(hcd, HC_USBCMD,
376 CMD_RESET, 0, 250 * 1000);
377 return retval;
378 }
379
380 static void qh_destroy(struct isp1760_qh *qh)
381 {
382 BUG_ON(!list_empty(&qh->qtd_list));
383 kmem_cache_free(qh_cachep, qh);
384 }
385
386 static struct isp1760_qh *isp1760_qh_alloc(gfp_t flags)
387 {
388 struct isp1760_qh *qh;
389
390 qh = kmem_cache_zalloc(qh_cachep, flags);
391 if (!qh)
392 return qh;
393
394 INIT_LIST_HEAD(&qh->qtd_list);
395 return qh;
396 }
397
398 /* magic numbers that can affect system performance */
399 #define EHCI_TUNE_CERR 3 /* 0-3 qtd retries; 0 == don't stop */
400 #define EHCI_TUNE_RL_HS 4 /* nak throttle; see 4.9 */
401 #define EHCI_TUNE_RL_TT 0
402 #define EHCI_TUNE_MULT_HS 1 /* 1-3 transactions/uframe; 4.10.3 */
403 #define EHCI_TUNE_MULT_TT 1
404 #define EHCI_TUNE_FLS 2 /* (small) 256 frame schedule */
405
406 /* one-time init, only for memory state */
407 static int priv_init(struct usb_hcd *hcd)
408 {
409 struct isp1760_hcd *priv = hcd_to_priv(hcd);
410 u32 hcc_params;
411
412 spin_lock_init(&priv->lock);
413
414 /*
415 * hw default: 1K periodic list heads, one per frame.
416 * periodic_size can shrink by USBCMD update if hcc_params allows.
417 */
418 priv->periodic_size = DEFAULT_I_TDPS;
419
420 /* controllers may cache some of the periodic schedule ... */
421 hcc_params = reg_read32(hcd->regs, HC_HCCPARAMS);
422 /* full frame cache */
423 if (HCC_ISOC_CACHE(hcc_params))
424 priv->i_thresh = 8;
425 else /* N microframes cached */
426 priv->i_thresh = 2 + HCC_ISOC_THRES(hcc_params);
427
428 return 0;
429 }
430
431 static int isp1760_hc_setup(struct usb_hcd *hcd)
432 {
433 struct isp1760_hcd *priv = hcd_to_priv(hcd);
434 int result;
435 u32 scratch, hwmode;
436
437 /* Setup HW Mode Control: This assumes a level active-low interrupt */
438 hwmode = HW_DATA_BUS_32BIT;
439
440 if (priv->devflags & ISP1760_FLAG_BUS_WIDTH_16)
441 hwmode &= ~HW_DATA_BUS_32BIT;
442 if (priv->devflags & ISP1760_FLAG_ANALOG_OC)
443 hwmode |= HW_ANA_DIGI_OC;
444 if (priv->devflags & ISP1760_FLAG_DACK_POL_HIGH)
445 hwmode |= HW_DACK_POL_HIGH;
446 if (priv->devflags & ISP1760_FLAG_DREQ_POL_HIGH)
447 hwmode |= HW_DREQ_POL_HIGH;
448 if (priv->devflags & ISP1760_FLAG_INTR_POL_HIGH)
449 hwmode |= HW_INTR_HIGH_ACT;
450 if (priv->devflags & ISP1760_FLAG_INTR_EDGE_TRIG)
451 hwmode |= HW_INTR_EDGE_TRIG;
452
453 /*
454 * We have to set this first in case we're in 16-bit mode.
455 * Write it twice to ensure correct upper bits if switching
456 * to 16-bit mode.
457 */
458 reg_write32(hcd->regs, HC_HW_MODE_CTRL, hwmode);
459 reg_write32(hcd->regs, HC_HW_MODE_CTRL, hwmode);
460
461 reg_write32(hcd->regs, HC_SCRATCH_REG, 0xdeadbabe);
462 /* Change bus pattern */
463 scratch = reg_read32(hcd->regs, HC_CHIP_ID_REG);
464 scratch = reg_read32(hcd->regs, HC_SCRATCH_REG);
465 if (scratch != 0xdeadbabe) {
466 dev_err(hcd->self.controller, "Scratch test failed.\n");
467 return -ENODEV;
468 }
469
470 /* pre reset */
471 isp1760_init_regs(hcd);
472
473 /* reset */
474 reg_write32(hcd->regs, HC_RESET_REG, SW_RESET_RESET_ALL);
475 mdelay(100);
476
477 reg_write32(hcd->regs, HC_RESET_REG, SW_RESET_RESET_HC);
478 mdelay(100);
479
480 result = ehci_reset(hcd);
481 if (result)
482 return result;
483
484 /* Step 11 passed */
485
486 dev_info(hcd->self.controller, "bus width: %d, oc: %s\n",
487 (priv->devflags & ISP1760_FLAG_BUS_WIDTH_16) ?
488 16 : 32, (priv->devflags & ISP1760_FLAG_ANALOG_OC) ?
489 "analog" : "digital");
490
491 /* ATL reset */
492 reg_write32(hcd->regs, HC_HW_MODE_CTRL, hwmode | ALL_ATX_RESET);
493 mdelay(10);
494 reg_write32(hcd->regs, HC_HW_MODE_CTRL, hwmode);
495
496 reg_write32(hcd->regs, HC_INTERRUPT_REG, INTERRUPT_ENABLE_MASK);
497 reg_write32(hcd->regs, HC_INTERRUPT_ENABLE, INTERRUPT_ENABLE_MASK);
498
499 /*
500 * PORT 1 Control register of the ISP1760 is the OTG control
501 * register on ISP1761. Since there is no OTG or device controller
502 * support in this driver, we use port 1 as a "normal" USB host port on
503 * both chips.
504 */
505 reg_write32(hcd->regs, HC_PORT1_CTRL, PORT1_POWER | PORT1_INIT2);
506 mdelay(10);
507
508 priv->hcs_params = reg_read32(hcd->regs, HC_HCSPARAMS);
509
510 return priv_init(hcd);
511 }
512
513 static void isp1760_init_maps(struct usb_hcd *hcd)
514 {
515 /*set last maps, for iso its only 1, else 32 tds bitmap*/
516 reg_write32(hcd->regs, HC_ATL_PTD_LASTPTD_REG, 0x80000000);
517 reg_write32(hcd->regs, HC_INT_PTD_LASTPTD_REG, 0x80000000);
518 reg_write32(hcd->regs, HC_ISO_PTD_LASTPTD_REG, 0x00000001);
519 }
520
521 static void isp1760_enable_interrupts(struct usb_hcd *hcd)
522 {
523 reg_write32(hcd->regs, HC_ATL_IRQ_MASK_AND_REG, 0);
524 reg_write32(hcd->regs, HC_ATL_IRQ_MASK_OR_REG, 0);
525 reg_write32(hcd->regs, HC_INT_IRQ_MASK_AND_REG, 0);
526 reg_write32(hcd->regs, HC_INT_IRQ_MASK_OR_REG, 0);
527 reg_write32(hcd->regs, HC_ISO_IRQ_MASK_AND_REG, 0);
528 reg_write32(hcd->regs, HC_ISO_IRQ_MASK_OR_REG, 0xffffffff);
529 /* step 23 passed */
530 }
531
532 static int isp1760_run(struct usb_hcd *hcd)
533 {
534 int retval;
535 u32 temp;
536 u32 command;
537 u32 chipid;
538
539 hcd->uses_new_polling = 1;
540
541 hcd->state = HC_STATE_RUNNING;
542 isp1760_enable_interrupts(hcd);
543 temp = reg_read32(hcd->regs, HC_HW_MODE_CTRL);
544 reg_write32(hcd->regs, HC_HW_MODE_CTRL, temp | HW_GLOBAL_INTR_EN);
545
546 command = reg_read32(hcd->regs, HC_USBCMD);
547 command &= ~(CMD_LRESET|CMD_RESET);
548 command |= CMD_RUN;
549 reg_write32(hcd->regs, HC_USBCMD, command);
550
551 retval = handshake(hcd, HC_USBCMD, CMD_RUN, CMD_RUN,
552 250 * 1000);
553 if (retval)
554 return retval;
555
556 /*
557 * XXX
558 * Spec says to write FLAG_CF as last config action, priv code grabs
559 * the semaphore while doing so.
560 */
561 down_write(&ehci_cf_port_reset_rwsem);
562 reg_write32(hcd->regs, HC_CONFIGFLAG, FLAG_CF);
563
564 retval = handshake(hcd, HC_CONFIGFLAG, FLAG_CF, FLAG_CF, 250 * 1000);
565 up_write(&ehci_cf_port_reset_rwsem);
566 if (retval)
567 return retval;
568
569 chipid = reg_read32(hcd->regs, HC_CHIP_ID_REG);
570 dev_info(hcd->self.controller, "USB ISP %04x HW rev. %d started\n",
571 chipid & 0xffff, chipid >> 16);
572
573 /* PTD Register Init Part 2, Step 28 */
574 /* enable INTs */
575 isp1760_init_maps(hcd);
576
577 /* GRR this is run-once init(), being done every time the HC starts.
578 * So long as they're part of class devices, we can't do it init()
579 * since the class device isn't created that early.
580 */
581 return 0;
582 }
583
584 static u32 base_to_chip(u32 base)
585 {
586 return ((base - 0x400) >> 3);
587 }
588
589 static int last_qtd_of_urb(struct isp1760_qtd *qtd, struct isp1760_qh *qh)
590 {
591 struct urb *urb;
592
593 if (list_is_last(&qtd->qtd_list, &qh->qtd_list))
594 return 1;
595
596 urb = qtd->urb;
597 qtd = list_entry(qtd->qtd_list.next, typeof(*qtd), qtd_list);
598 return (qtd->urb != urb);
599 }
600
601 static void transform_into_atl(struct isp1760_qh *qh,
602 struct isp1760_qtd *qtd, struct ptd *ptd)
603 {
604 u32 maxpacket;
605 u32 multi;
606 u32 pid_code;
607 u32 rl = RL_COUNTER;
608 u32 nak = NAK_COUNTER;
609
610 memset(ptd, 0, sizeof(*ptd));
611
612 /* according to 3.6.2, max packet len can not be > 0x400 */
613 maxpacket = usb_maxpacket(qtd->urb->dev, qtd->urb->pipe,
614 usb_pipeout(qtd->urb->pipe));
615 multi = 1 + ((maxpacket >> 11) & 0x3);
616 maxpacket &= 0x7ff;
617
618 /* DW0 */
619 ptd->dw0 = PTD_VALID;
620 ptd->dw0 |= PTD_LENGTH(qtd->length);
621 ptd->dw0 |= PTD_MAXPACKET(maxpacket);
622 ptd->dw0 |= PTD_ENDPOINT(usb_pipeendpoint(qtd->urb->pipe));
623
624 /* DW1 */
625 ptd->dw1 = usb_pipeendpoint(qtd->urb->pipe) >> 1;
626 ptd->dw1 |= PTD_DEVICE_ADDR(usb_pipedevice(qtd->urb->pipe));
627
628 pid_code = qtd->packet_type;
629 ptd->dw1 |= PTD_PID_TOKEN(pid_code);
630
631 if (usb_pipebulk(qtd->urb->pipe))
632 ptd->dw1 |= PTD_TRANS_BULK;
633 else if (usb_pipeint(qtd->urb->pipe))
634 ptd->dw1 |= PTD_TRANS_INT;
635
636 if (qtd->urb->dev->speed != USB_SPEED_HIGH) {
637 /* split transaction */
638
639 ptd->dw1 |= PTD_TRANS_SPLIT;
640 if (qtd->urb->dev->speed == USB_SPEED_LOW)
641 ptd->dw1 |= PTD_SE_USB_LOSPEED;
642
643 ptd->dw1 |= PTD_PORT_NUM(qtd->urb->dev->ttport);
644 ptd->dw1 |= PTD_HUB_NUM(qtd->urb->dev->tt->hub->devnum);
645
646 /* SE bit for Split INT transfers */
647 if (usb_pipeint(qtd->urb->pipe) &&
648 (qtd->urb->dev->speed == USB_SPEED_LOW))
649 ptd->dw1 |= 2 << 16;
650
651 ptd->dw3 = 0;
652 rl = 0;
653 nak = 0;
654 } else {
655 ptd->dw0 |= PTD_MULTI(multi);
656 if (usb_pipecontrol(qtd->urb->pipe) ||
657 usb_pipebulk(qtd->urb->pipe))
658 ptd->dw3 = qh->ping;
659 else
660 ptd->dw3 = 0;
661 }
662 /* DW2 */
663 ptd->dw2 = 0;
664 ptd->dw2 |= PTD_DATA_START_ADDR(base_to_chip(qtd->payload_addr));
665 ptd->dw2 |= PTD_RL_CNT(rl);
666 ptd->dw3 |= PTD_NAC_CNT(nak);
667
668 /* DW3 */
669 ptd->dw3 |= qh->toggle;
670 if (usb_pipecontrol(qtd->urb->pipe)) {
671 if (qtd->data_buffer == qtd->urb->setup_packet)
672 ptd->dw3 &= ~PTD_DATA_TOGGLE(1);
673 else if (last_qtd_of_urb(qtd, qh))
674 ptd->dw3 |= PTD_DATA_TOGGLE(1);
675 }
676
677 ptd->dw3 |= PTD_ACTIVE;
678 /* Cerr */
679 ptd->dw3 |= PTD_CERR(ERR_COUNTER);
680 }
681
682 static void transform_add_int(struct isp1760_qh *qh,
683 struct isp1760_qtd *qtd, struct ptd *ptd)
684 {
685 u32 usof;
686 u32 period;
687
688 /*
689 * Most of this is guessing. ISP1761 datasheet is quite unclear, and
690 * the algorithm from the original Philips driver code, which was
691 * pretty much used in this driver before as well, is quite horrendous
692 * and, i believe, incorrect. The code below follows the datasheet and
693 * USB2.0 spec as far as I can tell, and plug/unplug seems to be much
694 * more reliable this way (fingers crossed...).
695 */
696
697 if (qtd->urb->dev->speed == USB_SPEED_HIGH) {
698 /* urb->interval is in units of microframes (1/8 ms) */
699 period = qtd->urb->interval >> 3;
700
701 if (qtd->urb->interval > 4)
702 usof = 0x01; /* One bit set =>
703 interval 1 ms * uFrame-match */
704 else if (qtd->urb->interval > 2)
705 usof = 0x22; /* Two bits set => interval 1/2 ms */
706 else if (qtd->urb->interval > 1)
707 usof = 0x55; /* Four bits set => interval 1/4 ms */
708 else
709 usof = 0xff; /* All bits set => interval 1/8 ms */
710 } else {
711 /* urb->interval is in units of frames (1 ms) */
712 period = qtd->urb->interval;
713 usof = 0x0f; /* Execute Start Split on any of the
714 four first uFrames */
715
716 /*
717 * First 8 bits in dw5 is uSCS and "specifies which uSOF the
718 * complete split needs to be sent. Valid only for IN." Also,
719 * "All bits can be set to one for every transfer." (p 82,
720 * ISP1761 data sheet.) 0x1c is from Philips driver. Where did
721 * that number come from? 0xff seems to work fine...
722 */
723 /* ptd->dw5 = 0x1c; */
724 ptd->dw5 = 0xff; /* Execute Complete Split on any uFrame */
725 }
726
727 period = period >> 1;/* Ensure equal or shorter period than requested */
728 period &= 0xf8; /* Mask off too large values and lowest unused 3 bits */
729
730 ptd->dw2 |= period;
731 ptd->dw4 = usof;
732 }
733
734 static void transform_into_int(struct isp1760_qh *qh,
735 struct isp1760_qtd *qtd, struct ptd *ptd)
736 {
737 transform_into_atl(qh, qtd, ptd);
738 transform_add_int(qh, qtd, ptd);
739 }
740
741 static int qtd_fill(struct isp1760_qtd *qtd, void *databuffer, size_t len,
742 u32 token)
743 {
744 int count;
745
746 qtd->data_buffer = databuffer;
747 qtd->packet_type = GET_QTD_TOKEN_TYPE(token);
748
749 if (len > MAX_PAYLOAD_SIZE)
750 count = MAX_PAYLOAD_SIZE;
751 else
752 count = len;
753
754 qtd->length = count;
755 return count;
756 }
757
758 static int check_error(struct usb_hcd *hcd, struct ptd *ptd)
759 {
760 int error = 0;
761
762 if (ptd->dw3 & DW3_HALT_BIT) {
763 error = -EPIPE;
764
765 if (ptd->dw3 & DW3_ERROR_BIT)
766 pr_err("error bit is set in DW3\n");
767 }
768
769 if (ptd->dw3 & DW3_QTD_ACTIVE) {
770 dev_err(hcd->self.controller, "Transfer active bit is set DW3\n"
771 "nak counter: %d, rl: %d\n",
772 (ptd->dw3 >> 19) & 0xf, (ptd->dw2 >> 25) & 0xf);
773 }
774
775 return error;
776 }
777
778 static void check_int_err_status(struct usb_hcd *hcd, u32 dw4)
779 {
780 u32 i;
781
782 dw4 >>= 8;
783
784 for (i = 0; i < 8; i++) {
785 switch (dw4 & 0x7) {
786 case INT_UNDERRUN:
787 dev_err(hcd->self.controller, "Underrun (%d)\n", i);
788 break;
789
790 case INT_EXACT:
791 dev_err(hcd->self.controller,
792 "Transaction error (%d)\n", i);
793 break;
794
795 case INT_BABBLE:
796 dev_err(hcd->self.controller, "Babble error (%d)\n", i);
797 break;
798 }
799 dw4 >>= 3;
800 }
801 }
802
803 static void enqueue_one_qtd(struct usb_hcd *hcd, struct isp1760_qtd *qtd)
804 {
805 if (qtd->length && (qtd->length <= MAX_PAYLOAD_SIZE)) {
806 switch (qtd->packet_type) {
807 case IN_PID:
808 break;
809 case OUT_PID:
810 case SETUP_PID:
811 mem_writes8(hcd->regs, qtd->payload_addr,
812 qtd->data_buffer, qtd->length);
813 }
814 }
815 }
816
817 static void enqueue_one_atl_qtd(struct usb_hcd *hcd, struct isp1760_qh *qh,
818 u32 slot, struct isp1760_qtd *qtd)
819 {
820 struct isp1760_hcd *priv = hcd_to_priv(hcd);
821 struct ptd ptd;
822
823 alloc_mem(hcd, qtd);
824 transform_into_atl(qh, qtd, &ptd);
825 ptd_write(hcd->regs, ATL_PTD_OFFSET, slot, &ptd);
826 enqueue_one_qtd(hcd, qtd);
827
828 priv->atl_ints[slot].qh = qh;
829 priv->atl_ints[slot].qtd = qtd;
830 qtd->status |= URB_ENQUEUED;
831 qtd->status |= slot << 16;
832 }
833
834 static void enqueue_one_int_qtd(struct usb_hcd *hcd, struct isp1760_qh *qh,
835 u32 slot, struct isp1760_qtd *qtd)
836 {
837 struct isp1760_hcd *priv = hcd_to_priv(hcd);
838 struct ptd ptd;
839
840 alloc_mem(hcd, qtd);
841 transform_into_int(qh, qtd, &ptd);
842 ptd_write(hcd->regs, INT_PTD_OFFSET, slot, &ptd);
843 enqueue_one_qtd(hcd, qtd);
844
845 priv->int_ints[slot].qh = qh;
846 priv->int_ints[slot].qtd = qtd;
847 qtd->status |= URB_ENQUEUED;
848 qtd->status |= slot << 16;
849 }
850
851 static void enqueue_an_ATL_packet(struct usb_hcd *hcd, struct isp1760_qh *qh,
852 struct isp1760_qtd *qtd)
853 {
854 struct isp1760_hcd *priv = hcd_to_priv(hcd);
855 u32 skip_map, or_map;
856 u32 slot;
857 u32 buffstatus;
858
859 /*
860 * When this function is called from the interrupt handler to enqueue
861 * a follow-up packet, the SKIP register gets written and read back
862 * almost immediately. With ISP1761, this register requires a delay of
863 * 195ns between a write and subsequent read (see section 15.1.1.3).
864 */
865 mmiowb();
866 ndelay(195);
867 skip_map = reg_read32(hcd->regs, HC_ATL_PTD_SKIPMAP_REG);
868
869 BUG_ON(!skip_map);
870 slot = __ffs(skip_map);
871
872 enqueue_one_atl_qtd(hcd, qh, slot, qtd);
873
874 or_map = reg_read32(hcd->regs, HC_ATL_IRQ_MASK_OR_REG);
875 or_map |= (1 << slot);
876 reg_write32(hcd->regs, HC_ATL_IRQ_MASK_OR_REG, or_map);
877
878 skip_map &= ~(1 << slot);
879 reg_write32(hcd->regs, HC_ATL_PTD_SKIPMAP_REG, skip_map);
880
881 priv->atl_queued++;
882 if (priv->atl_queued == 2)
883 reg_write32(hcd->regs, HC_INTERRUPT_ENABLE,
884 INTERRUPT_ENABLE_SOT_MASK);
885
886 buffstatus = reg_read32(hcd->regs, HC_BUFFER_STATUS_REG);
887 buffstatus |= ATL_BUFFER;
888 reg_write32(hcd->regs, HC_BUFFER_STATUS_REG, buffstatus);
889 }
890
891 static void enqueue_an_INT_packet(struct usb_hcd *hcd, struct isp1760_qh *qh,
892 struct isp1760_qtd *qtd)
893 {
894 u32 skip_map, or_map;
895 u32 slot;
896 u32 buffstatus;
897
898 /*
899 * When this function is called from the interrupt handler to enqueue
900 * a follow-up packet, the SKIP register gets written and read back
901 * almost immediately. With ISP1761, this register requires a delay of
902 * 195ns between a write and subsequent read (see section 15.1.1.3).
903 */
904 mmiowb();
905 ndelay(195);
906 skip_map = reg_read32(hcd->regs, HC_INT_PTD_SKIPMAP_REG);
907
908 BUG_ON(!skip_map);
909 slot = __ffs(skip_map);
910
911 enqueue_one_int_qtd(hcd, qh, slot, qtd);
912
913 or_map = reg_read32(hcd->regs, HC_INT_IRQ_MASK_OR_REG);
914 or_map |= (1 << slot);
915 reg_write32(hcd->regs, HC_INT_IRQ_MASK_OR_REG, or_map);
916
917 skip_map &= ~(1 << slot);
918 reg_write32(hcd->regs, HC_INT_PTD_SKIPMAP_REG, skip_map);
919
920 buffstatus = reg_read32(hcd->regs, HC_BUFFER_STATUS_REG);
921 buffstatus |= INT_BUFFER;
922 reg_write32(hcd->regs, HC_BUFFER_STATUS_REG, buffstatus);
923 }
924
925 static void isp1760_urb_done(struct usb_hcd *hcd, struct urb *urb)
926 __releases(priv->lock)
927 __acquires(priv->lock)
928 {
929 struct isp1760_hcd *priv = hcd_to_priv(hcd);
930
931 if (!urb->unlinked) {
932 if (urb->status == -EINPROGRESS)
933 urb->status = 0;
934 }
935
936 if (usb_pipein(urb->pipe) && usb_pipetype(urb->pipe) != PIPE_CONTROL) {
937 void *ptr;
938 for (ptr = urb->transfer_buffer;
939 ptr < urb->transfer_buffer + urb->transfer_buffer_length;
940 ptr += PAGE_SIZE)
941 flush_dcache_page(virt_to_page(ptr));
942 }
943
944 /* complete() can reenter this HCD */
945 usb_hcd_unlink_urb_from_ep(hcd, urb);
946 spin_unlock(&priv->lock);
947 usb_hcd_giveback_urb(hcd, urb, urb->status);
948 spin_lock(&priv->lock);
949 }
950
951 static void isp1760_qtd_free(struct isp1760_qtd *qtd)
952 {
953 BUG_ON(qtd->payload_addr);
954 kmem_cache_free(qtd_cachep, qtd);
955 }
956
957 static struct isp1760_qtd *clean_this_qtd(struct isp1760_qtd *qtd,
958 struct isp1760_qh *qh)
959 {
960 struct isp1760_qtd *tmp_qtd;
961
962 if (list_is_last(&qtd->qtd_list, &qh->qtd_list))
963 tmp_qtd = NULL;
964 else
965 tmp_qtd = list_entry(qtd->qtd_list.next, struct isp1760_qtd,
966 qtd_list);
967 list_del(&qtd->qtd_list);
968 isp1760_qtd_free(qtd);
969 return tmp_qtd;
970 }
971
972 /*
973 * Remove this QTD from the QH list and free its memory. If this QTD
974 * isn't the last one than remove also his successor(s).
975 * Returns the QTD which is part of an new URB and should be enqueued.
976 */
977 static struct isp1760_qtd *clean_up_qtdlist(struct isp1760_qtd *qtd,
978 struct isp1760_qh *qh)
979 {
980 struct urb *urb;
981
982 urb = qtd->urb;
983 do {
984 qtd = clean_this_qtd(qtd, qh);
985 } while (qtd && (qtd->urb == urb));
986
987 return qtd;
988 }
989
990 static void do_atl_int(struct usb_hcd *hcd)
991 {
992 struct isp1760_hcd *priv = hcd_to_priv(hcd);
993 u32 done_map, skip_map;
994 struct ptd ptd;
995 struct urb *urb;
996 u32 slot;
997 u32 length;
998 u32 or_map;
999 u32 status = -EINVAL;
1000 int error;
1001 struct isp1760_qtd *qtd;
1002 struct isp1760_qh *qh;
1003 u32 rl;
1004 u32 nakcount;
1005
1006 done_map = reg_read32(hcd->regs, HC_ATL_PTD_DONEMAP_REG);
1007 skip_map = reg_read32(hcd->regs, HC_ATL_PTD_SKIPMAP_REG);
1008
1009 or_map = reg_read32(hcd->regs, HC_ATL_IRQ_MASK_OR_REG);
1010 or_map &= ~done_map;
1011 reg_write32(hcd->regs, HC_ATL_IRQ_MASK_OR_REG, or_map);
1012
1013 while (done_map) {
1014 status = 0;
1015 priv->atl_queued--;
1016
1017 slot = __ffs(done_map);
1018 done_map &= ~(1 << slot);
1019 skip_map |= (1 << slot);
1020
1021 qtd = priv->atl_ints[slot].qtd;
1022 qh = priv->atl_ints[slot].qh;
1023
1024 if (!qh) {
1025 dev_err(hcd->self.controller, "qh is 0\n");
1026 continue;
1027 }
1028 ptd_read(hcd->regs, ATL_PTD_OFFSET, slot, &ptd);
1029
1030 rl = (ptd.dw2 >> 25) & 0x0f;
1031 nakcount = (ptd.dw3 >> 19) & 0xf;
1032
1033 /* Transfer Error, *but* active and no HALT -> reload */
1034 if ((ptd.dw3 & DW3_ERROR_BIT) && (ptd.dw3 & DW3_QTD_ACTIVE) &&
1035 !(ptd.dw3 & DW3_HALT_BIT)) {
1036
1037 /* according to ppriv code, we have to
1038 * reload this one if trasfered bytes != requested bytes
1039 * else act like everything went smooth..
1040 * XXX This just doesn't feel right and hasn't
1041 * triggered so far.
1042 */
1043
1044 length = PTD_XFERRED_LENGTH(ptd.dw3);
1045 dev_err(hcd->self.controller,
1046 "Should reload now... transferred %d "
1047 "of %zu\n", length, qtd->length);
1048 BUG();
1049 }
1050
1051 if (!nakcount && (ptd.dw3 & DW3_QTD_ACTIVE)) {
1052 u32 buffstatus;
1053
1054 /*
1055 * NAKs are handled in HW by the chip. Usually if the
1056 * device is not able to send data fast enough.
1057 * This happens mostly on slower hardware.
1058 */
1059
1060 /* RL counter = ERR counter */
1061 ptd.dw3 &= ~(0xf << 19);
1062 ptd.dw3 |= rl << 19;
1063 ptd.dw3 &= ~(3 << (55 - 32));
1064 ptd.dw3 |= ERR_COUNTER << (55 - 32);
1065
1066 /*
1067 * It is not needed to write skip map back because it
1068 * is unchanged. Just make sure that this entry is
1069 * unskipped once it gets written to the HW.
1070 */
1071 skip_map &= ~(1 << slot);
1072 or_map = reg_read32(hcd->regs, HC_ATL_IRQ_MASK_OR_REG);
1073 or_map |= 1 << slot;
1074 reg_write32(hcd->regs, HC_ATL_IRQ_MASK_OR_REG, or_map);
1075
1076 ptd.dw0 |= PTD_VALID;
1077 ptd_write(hcd->regs, ATL_PTD_OFFSET, slot, &ptd);
1078
1079 priv->atl_queued++;
1080 if (priv->atl_queued == 2)
1081 reg_write32(hcd->regs, HC_INTERRUPT_ENABLE,
1082 INTERRUPT_ENABLE_SOT_MASK);
1083
1084 buffstatus = reg_read32(hcd->regs,
1085 HC_BUFFER_STATUS_REG);
1086 buffstatus |= ATL_BUFFER;
1087 reg_write32(hcd->regs, HC_BUFFER_STATUS_REG,
1088 buffstatus);
1089 continue;
1090 }
1091
1092 error = check_error(hcd, &ptd);
1093 if (error) {
1094 status = error;
1095 priv->atl_ints[slot].qh->toggle = 0;
1096 priv->atl_ints[slot].qh->ping = 0;
1097 qtd->urb->status = -EPIPE;
1098
1099 #if 0
1100 printk(KERN_ERR "Error in %s().\n", __func__);
1101 printk(KERN_ERR "IN dw0: %08x dw1: %08x dw2: %08x "
1102 "dw3: %08x dw4: %08x dw5: %08x dw6: "
1103 "%08x dw7: %08x\n",
1104 ptd.dw0, ptd.dw1, ptd.dw2, ptd.dw3,
1105 ptd.dw4, ptd.dw5, ptd.dw6, ptd.dw7);
1106 #endif
1107 } else {
1108 priv->atl_ints[slot].qh->toggle = ptd.dw3 & (1 << 25);
1109 priv->atl_ints[slot].qh->ping = ptd.dw3 & (1 << 26);
1110 }
1111
1112 length = PTD_XFERRED_LENGTH(ptd.dw3);
1113 if (length) {
1114 switch (DW1_GET_PID(ptd.dw1)) {
1115 case IN_PID:
1116 mem_reads8(hcd->regs, qtd->payload_addr,
1117 qtd->data_buffer, length);
1118
1119 case OUT_PID:
1120
1121 qtd->urb->actual_length += length;
1122
1123 case SETUP_PID:
1124 break;
1125 }
1126 }
1127
1128 priv->atl_ints[slot].qtd = NULL;
1129 priv->atl_ints[slot].qh = NULL;
1130
1131 free_mem(hcd, qtd);
1132
1133 reg_write32(hcd->regs, HC_ATL_PTD_SKIPMAP_REG, skip_map);
1134
1135 if (qtd->urb->status == -EPIPE) {
1136 /* HALT was received */
1137
1138 urb = qtd->urb;
1139 qtd = clean_up_qtdlist(qtd, qh);
1140 isp1760_urb_done(hcd, urb);
1141
1142 } else if (usb_pipebulk(qtd->urb->pipe) &&
1143 (length < qtd->length)) {
1144 /* short BULK received */
1145
1146 if (qtd->urb->transfer_flags & URB_SHORT_NOT_OK) {
1147 qtd->urb->status = -EREMOTEIO;
1148 dev_dbg(hcd->self.controller,
1149 "short bulk, %d instead %zu "
1150 "with URB_SHORT_NOT_OK flag.\n",
1151 length, qtd->length);
1152 }
1153
1154 if (qtd->urb->status == -EINPROGRESS)
1155 qtd->urb->status = 0;
1156
1157 urb = qtd->urb;
1158 qtd = clean_up_qtdlist(qtd, qh);
1159 isp1760_urb_done(hcd, urb);
1160
1161 } else if (last_qtd_of_urb(qtd, qh)) {
1162 /* that was the last qtd of that URB */
1163
1164 if (qtd->urb->status == -EINPROGRESS)
1165 qtd->urb->status = 0;
1166
1167 urb = qtd->urb;
1168 qtd = clean_up_qtdlist(qtd, qh);
1169 isp1760_urb_done(hcd, urb);
1170
1171 } else {
1172 /* next QTD of this URB */
1173
1174 qtd = clean_this_qtd(qtd, qh);
1175 BUG_ON(!qtd);
1176 }
1177
1178 if (qtd)
1179 enqueue_an_ATL_packet(hcd, qh, qtd);
1180
1181 skip_map = reg_read32(hcd->regs, HC_ATL_PTD_SKIPMAP_REG);
1182 }
1183 if (priv->atl_queued <= 1)
1184 reg_write32(hcd->regs, HC_INTERRUPT_ENABLE,
1185 INTERRUPT_ENABLE_MASK);
1186 }
1187
1188 static void do_intl_int(struct usb_hcd *hcd)
1189 {
1190 struct isp1760_hcd *priv = hcd_to_priv(hcd);
1191 u32 done_map, skip_map;
1192 struct ptd ptd;
1193 struct urb *urb;
1194 u32 length;
1195 u32 or_map;
1196 int error;
1197 u32 slot;
1198 struct isp1760_qtd *qtd;
1199 struct isp1760_qh *qh;
1200
1201 done_map = reg_read32(hcd->regs, HC_INT_PTD_DONEMAP_REG);
1202 skip_map = reg_read32(hcd->regs, HC_INT_PTD_SKIPMAP_REG);
1203
1204 or_map = reg_read32(hcd->regs, HC_INT_IRQ_MASK_OR_REG);
1205 or_map &= ~done_map;
1206 reg_write32(hcd->regs, HC_INT_IRQ_MASK_OR_REG, or_map);
1207
1208 while (done_map) {
1209 slot = __ffs(done_map);
1210 done_map &= ~(1 << slot);
1211 skip_map |= (1 << slot);
1212
1213 qtd = priv->int_ints[slot].qtd;
1214 qh = priv->int_ints[slot].qh;
1215
1216 if (!qh) {
1217 dev_err(hcd->self.controller, "(INT) qh is 0\n");
1218 continue;
1219 }
1220
1221 ptd_read(hcd->regs, INT_PTD_OFFSET, slot, &ptd);
1222 check_int_err_status(hcd, ptd.dw4);
1223
1224 error = check_error(hcd, &ptd);
1225 if (error) {
1226 #if 0
1227 printk(KERN_ERR "Error in %s().\n", __func__);
1228 printk(KERN_ERR "IN dw0: %08x dw1: %08x dw2: %08x "
1229 "dw3: %08x dw4: %08x dw5: %08x dw6: "
1230 "%08x dw7: %08x\n",
1231 ptd.dw0, ptd.dw1, ptd.dw2, ptd.dw3,
1232 ptd.dw4, ptd.dw5, ptd.dw6, ptd.dw7);
1233 #endif
1234 qtd->urb->status = -EPIPE;
1235 priv->int_ints[slot].qh->toggle = 0;
1236 priv->int_ints[slot].qh->ping = 0;
1237
1238 } else {
1239 priv->int_ints[slot].qh->toggle = ptd.dw3 & (1 << 25);
1240 priv->int_ints[slot].qh->ping = ptd.dw3 & (1 << 26);
1241 }
1242
1243 if (qtd->urb->dev->speed != USB_SPEED_HIGH)
1244 length = PTD_XFERRED_LENGTH_LO(ptd.dw3);
1245 else
1246 length = PTD_XFERRED_LENGTH(ptd.dw3);
1247
1248 if (length) {
1249 switch (DW1_GET_PID(ptd.dw1)) {
1250 case IN_PID:
1251 mem_reads8(hcd->regs, qtd->payload_addr,
1252 qtd->data_buffer, length);
1253 case OUT_PID:
1254
1255 qtd->urb->actual_length += length;
1256
1257 case SETUP_PID:
1258 break;
1259 }
1260 }
1261
1262 priv->int_ints[slot].qtd = NULL;
1263 priv->int_ints[slot].qh = NULL;
1264
1265 reg_write32(hcd->regs, HC_INT_PTD_SKIPMAP_REG, skip_map);
1266 free_mem(hcd, qtd);
1267
1268 if (qtd->urb->status == -EPIPE) {
1269 /* HALT received */
1270
1271 urb = qtd->urb;
1272 qtd = clean_up_qtdlist(qtd, qh);
1273 isp1760_urb_done(hcd, urb);
1274
1275 } else if (last_qtd_of_urb(qtd, qh)) {
1276
1277 if (qtd->urb->status == -EINPROGRESS)
1278 qtd->urb->status = 0;
1279
1280 urb = qtd->urb;
1281 qtd = clean_up_qtdlist(qtd, qh);
1282 isp1760_urb_done(hcd, urb);
1283
1284 } else {
1285 /* next QTD of this URB */
1286
1287 qtd = clean_this_qtd(qtd, qh);
1288 BUG_ON(!qtd);
1289 }
1290
1291 if (qtd)
1292 enqueue_an_INT_packet(hcd, qh, qtd);
1293
1294 skip_map = reg_read32(hcd->regs, HC_INT_PTD_SKIPMAP_REG);
1295 }
1296 }
1297
1298 static struct isp1760_qh *qh_make(struct usb_hcd *hcd, struct urb *urb,
1299 gfp_t flags)
1300 {
1301 struct isp1760_qh *qh;
1302 int is_input, type;
1303
1304 qh = isp1760_qh_alloc(flags);
1305 if (!qh)
1306 return qh;
1307
1308 /*
1309 * init endpoint/device data for this QH
1310 */
1311 is_input = usb_pipein(urb->pipe);
1312 type = usb_pipetype(urb->pipe);
1313
1314 if (!usb_pipecontrol(urb->pipe))
1315 usb_settoggle(urb->dev, usb_pipeendpoint(urb->pipe), !is_input,
1316 1);
1317 return qh;
1318 }
1319
1320 /*
1321 * For control/bulk/interrupt, return QH with these TDs appended.
1322 * Allocates and initializes the QH if necessary.
1323 * Returns null if it can't allocate a QH it needs to.
1324 * If the QH has TDs (urbs) already, that's great.
1325 */
1326 static struct isp1760_qh *qh_append_tds(struct usb_hcd *hcd,
1327 struct urb *urb, struct list_head *qtd_list, int epnum,
1328 void **ptr)
1329 {
1330 struct isp1760_qh *qh;
1331
1332 qh = (struct isp1760_qh *)*ptr;
1333 if (!qh) {
1334 /* can't sleep here, we have priv->lock... */
1335 qh = qh_make(hcd, urb, GFP_ATOMIC);
1336 if (!qh)
1337 return qh;
1338 *ptr = qh;
1339 }
1340
1341 list_splice(qtd_list, qh->qtd_list.prev);
1342
1343 return qh;
1344 }
1345
1346 static void qtd_list_free(struct urb *urb, struct list_head *qtd_list)
1347 {
1348 struct list_head *entry, *temp;
1349
1350 list_for_each_safe(entry, temp, qtd_list) {
1351 struct isp1760_qtd *qtd;
1352
1353 qtd = list_entry(entry, struct isp1760_qtd, qtd_list);
1354 list_del(&qtd->qtd_list);
1355 isp1760_qtd_free(qtd);
1356 }
1357 }
1358
1359 static int isp1760_prepare_enqueue(struct usb_hcd *hcd, struct urb *urb,
1360 struct list_head *qtd_list, gfp_t mem_flags, packet_enqueue *p)
1361 {
1362 struct isp1760_hcd *priv = hcd_to_priv(hcd);
1363 struct isp1760_qtd *qtd;
1364 int epnum;
1365 unsigned long flags;
1366 struct isp1760_qh *qh = NULL;
1367 int rc;
1368 int qh_busy;
1369
1370 qtd = list_entry(qtd_list->next, struct isp1760_qtd, qtd_list);
1371 epnum = urb->ep->desc.bEndpointAddress;
1372
1373 spin_lock_irqsave(&priv->lock, flags);
1374 if (!HCD_HW_ACCESSIBLE(hcd)) {
1375 rc = -ESHUTDOWN;
1376 goto done;
1377 }
1378 rc = usb_hcd_link_urb_to_ep(hcd, urb);
1379 if (rc)
1380 goto done;
1381
1382 qh = urb->ep->hcpriv;
1383 if (qh)
1384 qh_busy = !list_empty(&qh->qtd_list);
1385 else
1386 qh_busy = 0;
1387
1388 qh = qh_append_tds(hcd, urb, qtd_list, epnum, &urb->ep->hcpriv);
1389 if (!qh) {
1390 usb_hcd_unlink_urb_from_ep(hcd, urb);
1391 rc = -ENOMEM;
1392 goto done;
1393 }
1394
1395 if (!qh_busy)
1396 p(hcd, qh, qtd);
1397
1398 done:
1399 spin_unlock_irqrestore(&priv->lock, flags);
1400 if (!qh)
1401 qtd_list_free(urb, qtd_list);
1402 return rc;
1403 }
1404
1405 static struct isp1760_qtd *isp1760_qtd_alloc(gfp_t flags)
1406 {
1407 struct isp1760_qtd *qtd;
1408
1409 qtd = kmem_cache_zalloc(qtd_cachep, flags);
1410 if (qtd)
1411 INIT_LIST_HEAD(&qtd->qtd_list);
1412
1413 return qtd;
1414 }
1415
1416 /*
1417 * create a list of filled qtds for this URB; won't link into qh.
1418 */
1419 #define max_packet(wMaxPacketSize) ((wMaxPacketSize) & 0x07ff)
1420 static struct list_head *qh_urb_transaction(struct usb_hcd *hcd,
1421 struct urb *urb, struct list_head *head, gfp_t flags)
1422 {
1423 struct isp1760_qtd *qtd;
1424 void *buf;
1425 int len, maxpacket;
1426 int is_input;
1427 u32 token;
1428
1429 /*
1430 * URBs map to sequences of QTDs: one logical transaction
1431 */
1432 qtd = isp1760_qtd_alloc(flags);
1433 if (!qtd)
1434 return NULL;
1435
1436 list_add_tail(&qtd->qtd_list, head);
1437 qtd->urb = urb;
1438 urb->status = -EINPROGRESS;
1439
1440 token = 0;
1441 /* for split transactions, SplitXState initialized to zero */
1442
1443 len = urb->transfer_buffer_length;
1444 is_input = usb_pipein(urb->pipe);
1445 if (usb_pipecontrol(urb->pipe)) {
1446 /* SETUP pid */
1447 qtd_fill(qtd, urb->setup_packet,
1448 sizeof(struct usb_ctrlrequest),
1449 token | SETUP_PID);
1450
1451 /* ... and always at least one more pid */
1452 qtd = isp1760_qtd_alloc(flags);
1453 if (!qtd)
1454 goto cleanup;
1455 qtd->urb = urb;
1456 list_add_tail(&qtd->qtd_list, head);
1457
1458 /* for zero length DATA stages, STATUS is always IN */
1459 if (len == 0)
1460 token |= IN_PID;
1461 }
1462
1463 /*
1464 * data transfer stage: buffer setup
1465 */
1466 buf = urb->transfer_buffer;
1467
1468 if (is_input)
1469 token |= IN_PID;
1470 else
1471 token |= OUT_PID;
1472
1473 maxpacket = max_packet(usb_maxpacket(urb->dev, urb->pipe, !is_input));
1474
1475 /*
1476 * buffer gets wrapped in one or more qtds;
1477 * last one may be "short" (including zero len)
1478 * and may serve as a control status ack
1479 */
1480 for (;;) {
1481 int this_qtd_len;
1482
1483 if (!buf && len) {
1484 /* XXX This looks like usb storage / SCSI bug */
1485 dev_err(hcd->self.controller, "buf is null, dma is %08lx len is %d\n",
1486 (long unsigned)urb->transfer_dma, len);
1487 WARN_ON(1);
1488 }
1489
1490 this_qtd_len = qtd_fill(qtd, buf, len, token);
1491 len -= this_qtd_len;
1492 buf += this_qtd_len;
1493
1494 if (len <= 0)
1495 break;
1496
1497 qtd = isp1760_qtd_alloc(flags);
1498 if (!qtd)
1499 goto cleanup;
1500 qtd->urb = urb;
1501 list_add_tail(&qtd->qtd_list, head);
1502 }
1503
1504 /*
1505 * control requests may need a terminating data "status" ack;
1506 * bulk ones may need a terminating short packet (zero length).
1507 */
1508 if (urb->transfer_buffer_length != 0) {
1509 int one_more = 0;
1510
1511 if (usb_pipecontrol(urb->pipe)) {
1512 one_more = 1;
1513 /* "in" <--> "out" */
1514 token ^= IN_PID;
1515 } else if (usb_pipebulk(urb->pipe)
1516 && (urb->transfer_flags & URB_ZERO_PACKET)
1517 && !(urb->transfer_buffer_length % maxpacket)) {
1518 one_more = 1;
1519 }
1520 if (one_more) {
1521 qtd = isp1760_qtd_alloc(flags);
1522 if (!qtd)
1523 goto cleanup;
1524 qtd->urb = urb;
1525 list_add_tail(&qtd->qtd_list, head);
1526
1527 /* never any data in such packets */
1528 qtd_fill(qtd, NULL, 0, token);
1529 }
1530 }
1531
1532 qtd->status = 0;
1533 return head;
1534
1535 cleanup:
1536 qtd_list_free(urb, head);
1537 return NULL;
1538 }
1539
1540 static int isp1760_urb_enqueue(struct usb_hcd *hcd, struct urb *urb,
1541 gfp_t mem_flags)
1542 {
1543 struct list_head qtd_list;
1544 packet_enqueue *pe;
1545
1546 INIT_LIST_HEAD(&qtd_list);
1547
1548 switch (usb_pipetype(urb->pipe)) {
1549 case PIPE_CONTROL:
1550 case PIPE_BULK:
1551 if (!qh_urb_transaction(hcd, urb, &qtd_list, mem_flags))
1552 return -ENOMEM;
1553 pe = enqueue_an_ATL_packet;
1554 break;
1555
1556 case PIPE_INTERRUPT:
1557 if (!qh_urb_transaction(hcd, urb, &qtd_list, mem_flags))
1558 return -ENOMEM;
1559 pe = enqueue_an_INT_packet;
1560 break;
1561
1562 case PIPE_ISOCHRONOUS:
1563 dev_err(hcd->self.controller, "PIPE_ISOCHRONOUS ain't supported\n");
1564 default:
1565 return -EPIPE;
1566 }
1567
1568 return isp1760_prepare_enqueue(hcd, urb, &qtd_list, mem_flags, pe);
1569 }
1570
1571 static int isp1760_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status)
1572 {
1573 struct isp1760_hcd *priv = hcd_to_priv(hcd);
1574 struct inter_packet_info *ints;
1575 u32 i;
1576 u32 reg_base, or_reg, skip_reg;
1577 unsigned long flags;
1578 struct ptd ptd;
1579 packet_enqueue *pe;
1580
1581 switch (usb_pipetype(urb->pipe)) {
1582 case PIPE_ISOCHRONOUS:
1583 return -EPIPE;
1584 break;
1585
1586 case PIPE_INTERRUPT:
1587 ints = priv->int_ints;
1588 reg_base = INT_PTD_OFFSET;
1589 or_reg = HC_INT_IRQ_MASK_OR_REG;
1590 skip_reg = HC_INT_PTD_SKIPMAP_REG;
1591 pe = enqueue_an_INT_packet;
1592 break;
1593
1594 default:
1595 ints = priv->atl_ints;
1596 reg_base = ATL_PTD_OFFSET;
1597 or_reg = HC_ATL_IRQ_MASK_OR_REG;
1598 skip_reg = HC_ATL_PTD_SKIPMAP_REG;
1599 pe = enqueue_an_ATL_packet;
1600 break;
1601 }
1602
1603 memset(&ptd, 0, sizeof(ptd));
1604 spin_lock_irqsave(&priv->lock, flags);
1605
1606 for (i = 0; i < 32; i++) {
1607 if (!ints[i].qh)
1608 continue;
1609 BUG_ON(!ints[i].qtd);
1610
1611 if (ints[i].qtd->urb == urb) {
1612 u32 skip_map;
1613 u32 or_map;
1614 struct isp1760_qtd *qtd;
1615 struct isp1760_qh *qh;
1616
1617 skip_map = reg_read32(hcd->regs, skip_reg);
1618 skip_map |= 1 << i;
1619 reg_write32(hcd->regs, skip_reg, skip_map);
1620
1621 or_map = reg_read32(hcd->regs, or_reg);
1622 or_map &= ~(1 << i);
1623 reg_write32(hcd->regs, or_reg, or_map);
1624
1625 ptd_write(hcd->regs, reg_base, i, &ptd);
1626
1627 qtd = ints[i].qtd;
1628 qh = ints[i].qh;
1629
1630 free_mem(hcd, qtd);
1631 qtd = clean_up_qtdlist(qtd, qh);
1632
1633 ints[i].qh = NULL;
1634 ints[i].qtd = NULL;
1635
1636 isp1760_urb_done(hcd, urb);
1637 if (qtd)
1638 pe(hcd, qh, qtd);
1639 break;
1640
1641 } else {
1642 struct isp1760_qtd *qtd;
1643
1644 list_for_each_entry(qtd, &ints[i].qtd->qtd_list,
1645 qtd_list) {
1646 if (qtd->urb == urb) {
1647 clean_up_qtdlist(qtd, ints[i].qh);
1648 isp1760_urb_done(hcd, urb);
1649 qtd = NULL;
1650 break;
1651 }
1652 }
1653
1654 /* We found the urb before the last slot */
1655 if (!qtd)
1656 break;
1657 }
1658 }
1659
1660 spin_unlock_irqrestore(&priv->lock, flags);
1661 return 0;
1662 }
1663
1664 static irqreturn_t isp1760_irq(struct usb_hcd *hcd)
1665 {
1666 struct isp1760_hcd *priv = hcd_to_priv(hcd);
1667 u32 imask;
1668 irqreturn_t irqret = IRQ_NONE;
1669
1670 spin_lock(&priv->lock);
1671
1672 if (!(hcd->state & HC_STATE_RUNNING))
1673 goto leave;
1674
1675 imask = reg_read32(hcd->regs, HC_INTERRUPT_REG);
1676 if (unlikely(!imask))
1677 goto leave;
1678
1679 reg_write32(hcd->regs, HC_INTERRUPT_REG, imask);
1680 if (imask & (HC_ATL_INT | HC_SOT_INT))
1681 do_atl_int(hcd);
1682
1683 if (imask & HC_INTL_INT)
1684 do_intl_int(hcd);
1685
1686 irqret = IRQ_HANDLED;
1687 leave:
1688 spin_unlock(&priv->lock);
1689 return irqret;
1690 }
1691
1692 static int isp1760_hub_status_data(struct usb_hcd *hcd, char *buf)
1693 {
1694 struct isp1760_hcd *priv = hcd_to_priv(hcd);
1695 u32 temp, status = 0;
1696 u32 mask;
1697 int retval = 1;
1698 unsigned long flags;
1699
1700 /* if !USB_SUSPEND, root hub timers won't get shut down ... */
1701 if (!HC_IS_RUNNING(hcd->state))
1702 return 0;
1703
1704 /* init status to no-changes */
1705 buf[0] = 0;
1706 mask = PORT_CSC;
1707
1708 spin_lock_irqsave(&priv->lock, flags);
1709 temp = reg_read32(hcd->regs, HC_PORTSC1);
1710
1711 if (temp & PORT_OWNER) {
1712 if (temp & PORT_CSC) {
1713 temp &= ~PORT_CSC;
1714 reg_write32(hcd->regs, HC_PORTSC1, temp);
1715 goto done;
1716 }
1717 }
1718
1719 /*
1720 * Return status information even for ports with OWNER set.
1721 * Otherwise khubd wouldn't see the disconnect event when a
1722 * high-speed device is switched over to the companion
1723 * controller by the user.
1724 */
1725
1726 if ((temp & mask) != 0
1727 || ((temp & PORT_RESUME) != 0
1728 && time_after_eq(jiffies,
1729 priv->reset_done))) {
1730 buf [0] |= 1 << (0 + 1);
1731 status = STS_PCD;
1732 }
1733 /* FIXME autosuspend idle root hubs */
1734 done:
1735 spin_unlock_irqrestore(&priv->lock, flags);
1736 return status ? retval : 0;
1737 }
1738
1739 static void isp1760_hub_descriptor(struct isp1760_hcd *priv,
1740 struct usb_hub_descriptor *desc)
1741 {
1742 int ports = HCS_N_PORTS(priv->hcs_params);
1743 u16 temp;
1744
1745 desc->bDescriptorType = 0x29;
1746 /* priv 1.0, 2.3.9 says 20ms max */
1747 desc->bPwrOn2PwrGood = 10;
1748 desc->bHubContrCurrent = 0;
1749
1750 desc->bNbrPorts = ports;
1751 temp = 1 + (ports / 8);
1752 desc->bDescLength = 7 + 2 * temp;
1753
1754 /* ports removable, and usb 1.0 legacy PortPwrCtrlMask */
1755 memset(&desc->u.hs.DeviceRemovable[0], 0, temp);
1756 memset(&desc->u.hs.DeviceRemovable[temp], 0xff, temp);
1757
1758 /* per-port overcurrent reporting */
1759 temp = 0x0008;
1760 if (HCS_PPC(priv->hcs_params))
1761 /* per-port power control */
1762 temp |= 0x0001;
1763 else
1764 /* no power switching */
1765 temp |= 0x0002;
1766 desc->wHubCharacteristics = cpu_to_le16(temp);
1767 }
1768
1769 #define PORT_WAKE_BITS (PORT_WKOC_E|PORT_WKDISC_E|PORT_WKCONN_E)
1770
1771 static int check_reset_complete(struct usb_hcd *hcd, int index,
1772 int port_status)
1773 {
1774 if (!(port_status & PORT_CONNECT))
1775 return port_status;
1776
1777 /* if reset finished and it's still not enabled -- handoff */
1778 if (!(port_status & PORT_PE)) {
1779
1780 dev_err(hcd->self.controller,
1781 "port %d full speed --> companion\n",
1782 index + 1);
1783
1784 port_status |= PORT_OWNER;
1785 port_status &= ~PORT_RWC_BITS;
1786 reg_write32(hcd->regs, HC_PORTSC1, port_status);
1787
1788 } else
1789 dev_err(hcd->self.controller, "port %d high speed\n",
1790 index + 1);
1791
1792 return port_status;
1793 }
1794
1795 static int isp1760_hub_control(struct usb_hcd *hcd, u16 typeReq,
1796 u16 wValue, u16 wIndex, char *buf, u16 wLength)
1797 {
1798 struct isp1760_hcd *priv = hcd_to_priv(hcd);
1799 int ports = HCS_N_PORTS(priv->hcs_params);
1800 u32 temp, status;
1801 unsigned long flags;
1802 int retval = 0;
1803 unsigned selector;
1804
1805 /*
1806 * FIXME: support SetPortFeatures USB_PORT_FEAT_INDICATOR.
1807 * HCS_INDICATOR may say we can change LEDs to off/amber/green.
1808 * (track current state ourselves) ... blink for diagnostics,
1809 * power, "this is the one", etc. EHCI spec supports this.
1810 */
1811
1812 spin_lock_irqsave(&priv->lock, flags);
1813 switch (typeReq) {
1814 case ClearHubFeature:
1815 switch (wValue) {
1816 case C_HUB_LOCAL_POWER:
1817 case C_HUB_OVER_CURRENT:
1818 /* no hub-wide feature/status flags */
1819 break;
1820 default:
1821 goto error;
1822 }
1823 break;
1824 case ClearPortFeature:
1825 if (!wIndex || wIndex > ports)
1826 goto error;
1827 wIndex--;
1828 temp = reg_read32(hcd->regs, HC_PORTSC1);
1829
1830 /*
1831 * Even if OWNER is set, so the port is owned by the
1832 * companion controller, khubd needs to be able to clear
1833 * the port-change status bits (especially
1834 * USB_PORT_STAT_C_CONNECTION).
1835 */
1836
1837 switch (wValue) {
1838 case USB_PORT_FEAT_ENABLE:
1839 reg_write32(hcd->regs, HC_PORTSC1, temp & ~PORT_PE);
1840 break;
1841 case USB_PORT_FEAT_C_ENABLE:
1842 /* XXX error? */
1843 break;
1844 case USB_PORT_FEAT_SUSPEND:
1845 if (temp & PORT_RESET)
1846 goto error;
1847
1848 if (temp & PORT_SUSPEND) {
1849 if ((temp & PORT_PE) == 0)
1850 goto error;
1851 /* resume signaling for 20 msec */
1852 temp &= ~(PORT_RWC_BITS);
1853 reg_write32(hcd->regs, HC_PORTSC1,
1854 temp | PORT_RESUME);
1855 priv->reset_done = jiffies +
1856 msecs_to_jiffies(20);
1857 }
1858 break;
1859 case USB_PORT_FEAT_C_SUSPEND:
1860 /* we auto-clear this feature */
1861 break;
1862 case USB_PORT_FEAT_POWER:
1863 if (HCS_PPC(priv->hcs_params))
1864 reg_write32(hcd->regs, HC_PORTSC1,
1865 temp & ~PORT_POWER);
1866 break;
1867 case USB_PORT_FEAT_C_CONNECTION:
1868 reg_write32(hcd->regs, HC_PORTSC1, temp | PORT_CSC);
1869 break;
1870 case USB_PORT_FEAT_C_OVER_CURRENT:
1871 /* XXX error ?*/
1872 break;
1873 case USB_PORT_FEAT_C_RESET:
1874 /* GetPortStatus clears reset */
1875 break;
1876 default:
1877 goto error;
1878 }
1879 reg_read32(hcd->regs, HC_USBCMD);
1880 break;
1881 case GetHubDescriptor:
1882 isp1760_hub_descriptor(priv, (struct usb_hub_descriptor *)
1883 buf);
1884 break;
1885 case GetHubStatus:
1886 /* no hub-wide feature/status flags */
1887 memset(buf, 0, 4);
1888 break;
1889 case GetPortStatus:
1890 if (!wIndex || wIndex > ports)
1891 goto error;
1892 wIndex--;
1893 status = 0;
1894 temp = reg_read32(hcd->regs, HC_PORTSC1);
1895
1896 /* wPortChange bits */
1897 if (temp & PORT_CSC)
1898 status |= USB_PORT_STAT_C_CONNECTION << 16;
1899
1900
1901 /* whoever resumes must GetPortStatus to complete it!! */
1902 if (temp & PORT_RESUME) {
1903 dev_err(hcd->self.controller, "Port resume should be skipped.\n");
1904
1905 /* Remote Wakeup received? */
1906 if (!priv->reset_done) {
1907 /* resume signaling for 20 msec */
1908 priv->reset_done = jiffies
1909 + msecs_to_jiffies(20);
1910 /* check the port again */
1911 mod_timer(&hcd->rh_timer, priv->reset_done);
1912 }
1913
1914 /* resume completed? */
1915 else if (time_after_eq(jiffies,
1916 priv->reset_done)) {
1917 status |= USB_PORT_STAT_C_SUSPEND << 16;
1918 priv->reset_done = 0;
1919
1920 /* stop resume signaling */
1921 temp = reg_read32(hcd->regs, HC_PORTSC1);
1922 reg_write32(hcd->regs, HC_PORTSC1,
1923 temp & ~(PORT_RWC_BITS | PORT_RESUME));
1924 retval = handshake(hcd, HC_PORTSC1,
1925 PORT_RESUME, 0, 2000 /* 2msec */);
1926 if (retval != 0) {
1927 dev_err(hcd->self.controller,
1928 "port %d resume error %d\n",
1929 wIndex + 1, retval);
1930 goto error;
1931 }
1932 temp &= ~(PORT_SUSPEND|PORT_RESUME|(3<<10));
1933 }
1934 }
1935
1936 /* whoever resets must GetPortStatus to complete it!! */
1937 if ((temp & PORT_RESET)
1938 && time_after_eq(jiffies,
1939 priv->reset_done)) {
1940 status |= USB_PORT_STAT_C_RESET << 16;
1941 priv->reset_done = 0;
1942
1943 /* force reset to complete */
1944 reg_write32(hcd->regs, HC_PORTSC1, temp & ~PORT_RESET);
1945 /* REVISIT: some hardware needs 550+ usec to clear
1946 * this bit; seems too long to spin routinely...
1947 */
1948 retval = handshake(hcd, HC_PORTSC1,
1949 PORT_RESET, 0, 750);
1950 if (retval != 0) {
1951 dev_err(hcd->self.controller, "port %d reset error %d\n",
1952 wIndex + 1, retval);
1953 goto error;
1954 }
1955
1956 /* see what we found out */
1957 temp = check_reset_complete(hcd, wIndex,
1958 reg_read32(hcd->regs, HC_PORTSC1));
1959 }
1960 /*
1961 * Even if OWNER is set, there's no harm letting khubd
1962 * see the wPortStatus values (they should all be 0 except
1963 * for PORT_POWER anyway).
1964 */
1965
1966 if (temp & PORT_OWNER)
1967 dev_err(hcd->self.controller, "PORT_OWNER is set\n");
1968
1969 if (temp & PORT_CONNECT) {
1970 status |= USB_PORT_STAT_CONNECTION;
1971 /* status may be from integrated TT */
1972 status |= USB_PORT_STAT_HIGH_SPEED;
1973 }
1974 if (temp & PORT_PE)
1975 status |= USB_PORT_STAT_ENABLE;
1976 if (temp & (PORT_SUSPEND|PORT_RESUME))
1977 status |= USB_PORT_STAT_SUSPEND;
1978 if (temp & PORT_RESET)
1979 status |= USB_PORT_STAT_RESET;
1980 if (temp & PORT_POWER)
1981 status |= USB_PORT_STAT_POWER;
1982
1983 put_unaligned(cpu_to_le32(status), (__le32 *) buf);
1984 break;
1985 case SetHubFeature:
1986 switch (wValue) {
1987 case C_HUB_LOCAL_POWER:
1988 case C_HUB_OVER_CURRENT:
1989 /* no hub-wide feature/status flags */
1990 break;
1991 default:
1992 goto error;
1993 }
1994 break;
1995 case SetPortFeature:
1996 selector = wIndex >> 8;
1997 wIndex &= 0xff;
1998 if (!wIndex || wIndex > ports)
1999 goto error;
2000 wIndex--;
2001 temp = reg_read32(hcd->regs, HC_PORTSC1);
2002 if (temp & PORT_OWNER)
2003 break;
2004
2005 /* temp &= ~PORT_RWC_BITS; */
2006 switch (wValue) {
2007 case USB_PORT_FEAT_ENABLE:
2008 reg_write32(hcd->regs, HC_PORTSC1, temp | PORT_PE);
2009 break;
2010
2011 case USB_PORT_FEAT_SUSPEND:
2012 if ((temp & PORT_PE) == 0
2013 || (temp & PORT_RESET) != 0)
2014 goto error;
2015
2016 reg_write32(hcd->regs, HC_PORTSC1, temp | PORT_SUSPEND);
2017 break;
2018 case USB_PORT_FEAT_POWER:
2019 if (HCS_PPC(priv->hcs_params))
2020 reg_write32(hcd->regs, HC_PORTSC1,
2021 temp | PORT_POWER);
2022 break;
2023 case USB_PORT_FEAT_RESET:
2024 if (temp & PORT_RESUME)
2025 goto error;
2026 /* line status bits may report this as low speed,
2027 * which can be fine if this root hub has a
2028 * transaction translator built in.
2029 */
2030 if ((temp & (PORT_PE|PORT_CONNECT)) == PORT_CONNECT
2031 && PORT_USB11(temp)) {
2032 temp |= PORT_OWNER;
2033 } else {
2034 temp |= PORT_RESET;
2035 temp &= ~PORT_PE;
2036
2037 /*
2038 * caller must wait, then call GetPortStatus
2039 * usb 2.0 spec says 50 ms resets on root
2040 */
2041 priv->reset_done = jiffies +
2042 msecs_to_jiffies(50);
2043 }
2044 reg_write32(hcd->regs, HC_PORTSC1, temp);
2045 break;
2046 default:
2047 goto error;
2048 }
2049 reg_read32(hcd->regs, HC_USBCMD);
2050 break;
2051
2052 default:
2053 error:
2054 /* "stall" on error */
2055 retval = -EPIPE;
2056 }
2057 spin_unlock_irqrestore(&priv->lock, flags);
2058 return retval;
2059 }
2060
2061 static void isp1760_endpoint_disable(struct usb_hcd *hcd,
2062 struct usb_host_endpoint *ep)
2063 {
2064 struct isp1760_hcd *priv = hcd_to_priv(hcd);
2065 struct isp1760_qh *qh;
2066 struct isp1760_qtd *qtd;
2067 unsigned long flags;
2068
2069 spin_lock_irqsave(&priv->lock, flags);
2070 qh = ep->hcpriv;
2071 if (!qh)
2072 goto out;
2073
2074 ep->hcpriv = NULL;
2075 do {
2076 /* more than entry might get removed */
2077 if (list_empty(&qh->qtd_list))
2078 break;
2079
2080 qtd = list_first_entry(&qh->qtd_list, struct isp1760_qtd,
2081 qtd_list);
2082
2083 if (qtd->status & URB_ENQUEUED) {
2084 spin_unlock_irqrestore(&priv->lock, flags);
2085 isp1760_urb_dequeue(hcd, qtd->urb, -ECONNRESET);
2086 spin_lock_irqsave(&priv->lock, flags);
2087 } else {
2088 struct urb *urb;
2089
2090 urb = qtd->urb;
2091 clean_up_qtdlist(qtd, qh);
2092 urb->status = -ECONNRESET;
2093 isp1760_urb_done(hcd, urb);
2094 }
2095 } while (1);
2096
2097 qh_destroy(qh);
2098 /* remove requests and leak them.
2099 * ATL are pretty fast done, INT could take a while...
2100 * The latter shoule be removed
2101 */
2102 out:
2103 spin_unlock_irqrestore(&priv->lock, flags);
2104 }
2105
2106 static int isp1760_get_frame(struct usb_hcd *hcd)
2107 {
2108 struct isp1760_hcd *priv = hcd_to_priv(hcd);
2109 u32 fr;
2110
2111 fr = reg_read32(hcd->regs, HC_FRINDEX);
2112 return (fr >> 3) % priv->periodic_size;
2113 }
2114
2115 static void isp1760_stop(struct usb_hcd *hcd)
2116 {
2117 struct isp1760_hcd *priv = hcd_to_priv(hcd);
2118 u32 temp;
2119
2120 isp1760_hub_control(hcd, ClearPortFeature, USB_PORT_FEAT_POWER, 1,
2121 NULL, 0);
2122 mdelay(20);
2123
2124 spin_lock_irq(&priv->lock);
2125 ehci_reset(hcd);
2126 /* Disable IRQ */
2127 temp = reg_read32(hcd->regs, HC_HW_MODE_CTRL);
2128 reg_write32(hcd->regs, HC_HW_MODE_CTRL, temp &= ~HW_GLOBAL_INTR_EN);
2129 spin_unlock_irq(&priv->lock);
2130
2131 reg_write32(hcd->regs, HC_CONFIGFLAG, 0);
2132 }
2133
2134 static void isp1760_shutdown(struct usb_hcd *hcd)
2135 {
2136 u32 command, temp;
2137
2138 isp1760_stop(hcd);
2139 temp = reg_read32(hcd->regs, HC_HW_MODE_CTRL);
2140 reg_write32(hcd->regs, HC_HW_MODE_CTRL, temp &= ~HW_GLOBAL_INTR_EN);
2141
2142 command = reg_read32(hcd->regs, HC_USBCMD);
2143 command &= ~CMD_RUN;
2144 reg_write32(hcd->regs, HC_USBCMD, command);
2145 }
2146
2147 static const struct hc_driver isp1760_hc_driver = {
2148 .description = "isp1760-hcd",
2149 .product_desc = "NXP ISP1760 USB Host Controller",
2150 .hcd_priv_size = sizeof(struct isp1760_hcd),
2151 .irq = isp1760_irq,
2152 .flags = HCD_MEMORY | HCD_USB2,
2153 .reset = isp1760_hc_setup,
2154 .start = isp1760_run,
2155 .stop = isp1760_stop,
2156 .shutdown = isp1760_shutdown,
2157 .urb_enqueue = isp1760_urb_enqueue,
2158 .urb_dequeue = isp1760_urb_dequeue,
2159 .endpoint_disable = isp1760_endpoint_disable,
2160 .get_frame_number = isp1760_get_frame,
2161 .hub_status_data = isp1760_hub_status_data,
2162 .hub_control = isp1760_hub_control,
2163 };
2164
2165 int __init init_kmem_once(void)
2166 {
2167 qtd_cachep = kmem_cache_create("isp1760_qtd",
2168 sizeof(struct isp1760_qtd), 0, SLAB_TEMPORARY |
2169 SLAB_MEM_SPREAD, NULL);
2170
2171 if (!qtd_cachep)
2172 return -ENOMEM;
2173
2174 qh_cachep = kmem_cache_create("isp1760_qh", sizeof(struct isp1760_qh),
2175 0, SLAB_TEMPORARY | SLAB_MEM_SPREAD, NULL);
2176
2177 if (!qh_cachep) {
2178 kmem_cache_destroy(qtd_cachep);
2179 return -ENOMEM;
2180 }
2181
2182 return 0;
2183 }
2184
2185 void deinit_kmem_cache(void)
2186 {
2187 kmem_cache_destroy(qtd_cachep);
2188 kmem_cache_destroy(qh_cachep);
2189 }
2190
2191 struct usb_hcd *isp1760_register(phys_addr_t res_start, resource_size_t res_len,
2192 int irq, unsigned long irqflags,
2193 struct device *dev, const char *busname,
2194 unsigned int devflags)
2195 {
2196 struct usb_hcd *hcd;
2197 struct isp1760_hcd *priv;
2198 int ret;
2199
2200 if (usb_disabled())
2201 return ERR_PTR(-ENODEV);
2202
2203 /* prevent usb-core allocating DMA pages */
2204 dev->dma_mask = NULL;
2205
2206 hcd = usb_create_hcd(&isp1760_hc_driver, dev, dev_name(dev));
2207 if (!hcd)
2208 return ERR_PTR(-ENOMEM);
2209
2210 priv = hcd_to_priv(hcd);
2211 priv->devflags = devflags;
2212 init_memory(priv);
2213 hcd->regs = ioremap(res_start, res_len);
2214 if (!hcd->regs) {
2215 ret = -EIO;
2216 goto err_put;
2217 }
2218
2219 hcd->irq = irq;
2220 hcd->rsrc_start = res_start;
2221 hcd->rsrc_len = res_len;
2222
2223 ret = usb_add_hcd(hcd, irq, irqflags);
2224 if (ret)
2225 goto err_unmap;
2226
2227 return hcd;
2228
2229 err_unmap:
2230 iounmap(hcd->regs);
2231
2232 err_put:
2233 usb_put_hcd(hcd);
2234
2235 return ERR_PTR(ret);
2236 }
2237
2238 MODULE_DESCRIPTION("Driver for the ISP1760 USB-controller from NXP");
2239 MODULE_AUTHOR("Sebastian Siewior <bigeasy@linuxtronix.de>");
2240 MODULE_LICENSE("GPL v2");
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