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18#include <linux/kernel.h>
19#include <linux/dma-mapping.h>
20#include <linux/uwb/umc.h>
21#include <linux/usb.h>
22
23#include "../../wusbcore/wusbhc.h"
24
25#include "whcd.h"
26
27static void update_pzl_pointers(struct whc *whc, int period, u64 addr)
28{
29 switch (period) {
30 case 0:
31 whc_qset_set_link_ptr(&whc->pz_list[0], addr);
32 whc_qset_set_link_ptr(&whc->pz_list[2], addr);
33 whc_qset_set_link_ptr(&whc->pz_list[4], addr);
34 whc_qset_set_link_ptr(&whc->pz_list[6], addr);
35 whc_qset_set_link_ptr(&whc->pz_list[8], addr);
36 whc_qset_set_link_ptr(&whc->pz_list[10], addr);
37 whc_qset_set_link_ptr(&whc->pz_list[12], addr);
38 whc_qset_set_link_ptr(&whc->pz_list[14], addr);
39 break;
40 case 1:
41 whc_qset_set_link_ptr(&whc->pz_list[1], addr);
42 whc_qset_set_link_ptr(&whc->pz_list[5], addr);
43 whc_qset_set_link_ptr(&whc->pz_list[9], addr);
44 whc_qset_set_link_ptr(&whc->pz_list[13], addr);
45 break;
46 case 2:
47 whc_qset_set_link_ptr(&whc->pz_list[3], addr);
48 whc_qset_set_link_ptr(&whc->pz_list[11], addr);
49 break;
50 case 3:
51 whc_qset_set_link_ptr(&whc->pz_list[7], addr);
52 break;
53 case 4:
54 whc_qset_set_link_ptr(&whc->pz_list[15], addr);
55 break;
56 }
57}
58
59
60
61
62
63
64static int qset_get_period(struct whc *whc, struct whc_qset *qset)
65{
66 uint8_t bInterval = qset->ep->desc.bInterval;
67
68 if (bInterval < 6)
69 bInterval = 6;
70 if (bInterval > 10)
71 bInterval = 10;
72 return bInterval - 6;
73}
74
75static void qset_insert_in_sw_list(struct whc *whc, struct whc_qset *qset)
76{
77 int period;
78
79 period = qset_get_period(whc, qset);
80
81 qset_clear(whc, qset);
82 list_move(&qset->list_node, &whc->periodic_list[period]);
83 qset->in_sw_list = true;
84}
85
86static void pzl_qset_remove(struct whc *whc, struct whc_qset *qset)
87{
88 list_move(&qset->list_node, &whc->periodic_removed_list);
89 qset->in_hw_list = false;
90 qset->in_sw_list = false;
91}
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101
102static enum whc_update pzl_process_qset(struct whc *whc, struct whc_qset *qset)
103{
104 enum whc_update update = 0;
105 uint32_t status = 0;
106
107 while (qset->ntds) {
108 struct whc_qtd *td;
109 int t;
110
111 t = qset->td_start;
112 td = &qset->qtd[qset->td_start];
113 status = le32_to_cpu(td->status);
114
115
116
117
118 if (status & QTD_STS_ACTIVE)
119 break;
120
121 if (status & QTD_STS_HALTED) {
122
123 process_halted_qtd(whc, qset, td);
124
125
126
127 update |= WHC_UPDATE_UPDATED;
128 goto done;
129 }
130
131
132 process_inactive_qtd(whc, qset, td);
133 }
134
135 if (!qset->remove)
136 update |= qset_add_qtds(whc, qset);
137
138done:
139
140
141
142 if (qset->remove && qset->ntds == 0) {
143 pzl_qset_remove(whc, qset);
144 update |= WHC_UPDATE_REMOVED;
145 }
146
147 return update;
148}
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156
157void pzl_start(struct whc *whc)
158{
159 le_writeq(whc->pz_list_dma, whc->base + WUSBPERIODICLISTBASE);
160
161 whc_write_wusbcmd(whc, WUSBCMD_PERIODIC_EN, WUSBCMD_PERIODIC_EN);
162 whci_wait_for(&whc->umc->dev, whc->base + WUSBSTS,
163 WUSBSTS_PERIODIC_SCHED, WUSBSTS_PERIODIC_SCHED,
164 1000, "start PZL");
165}
166
167
168
169
170
171void pzl_stop(struct whc *whc)
172{
173 whc_write_wusbcmd(whc, WUSBCMD_PERIODIC_EN, 0);
174 whci_wait_for(&whc->umc->dev, whc->base + WUSBSTS,
175 WUSBSTS_PERIODIC_SCHED, 0,
176 1000, "stop PZL");
177}
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186
187
188void pzl_update(struct whc *whc, uint32_t wusbcmd)
189{
190 struct wusbhc *wusbhc = &whc->wusbhc;
191 long t;
192
193 mutex_lock(&wusbhc->mutex);
194 if (wusbhc->active) {
195 whc_write_wusbcmd(whc, wusbcmd, wusbcmd);
196 t = wait_event_timeout(
197 whc->periodic_list_wq,
198 (le_readl(whc->base + WUSBCMD) & WUSBCMD_PERIODIC_UPDATED) == 0,
199 msecs_to_jiffies(1000));
200 if (t == 0)
201 whc_hw_error(whc, "PZL update timeout");
202 }
203 mutex_unlock(&wusbhc->mutex);
204}
205
206static void update_pzl_hw_view(struct whc *whc)
207{
208 struct whc_qset *qset, *t;
209 int period;
210 u64 tmp_qh = 0;
211
212 for (period = 0; period < 5; period++) {
213 list_for_each_entry_safe(qset, t, &whc->periodic_list[period], list_node) {
214 whc_qset_set_link_ptr(&qset->qh.link, tmp_qh);
215 tmp_qh = qset->qset_dma;
216 qset->in_hw_list = true;
217 }
218 update_pzl_pointers(whc, period, tmp_qh);
219 }
220}
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228
229
230void scan_periodic_work(struct work_struct *work)
231{
232 struct whc *whc = container_of(work, struct whc, periodic_work);
233 struct whc_qset *qset, *t;
234 enum whc_update update = 0;
235 int period;
236
237 spin_lock_irq(&whc->lock);
238
239 for (period = 4; period >= 0; period--) {
240 list_for_each_entry_safe(qset, t, &whc->periodic_list[period], list_node) {
241 if (!qset->in_hw_list)
242 update |= WHC_UPDATE_ADDED;
243 update |= pzl_process_qset(whc, qset);
244 }
245 }
246
247 if (update & (WHC_UPDATE_ADDED | WHC_UPDATE_REMOVED))
248 update_pzl_hw_view(whc);
249
250 spin_unlock_irq(&whc->lock);
251
252 if (update) {
253 uint32_t wusbcmd = WUSBCMD_PERIODIC_UPDATED | WUSBCMD_PERIODIC_SYNCED_DB;
254 if (update & WHC_UPDATE_REMOVED)
255 wusbcmd |= WUSBCMD_PERIODIC_QSET_RM;
256 pzl_update(whc, wusbcmd);
257 }
258
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264
265
266 spin_lock_irq(&whc->lock);
267
268 list_for_each_entry_safe(qset, t, &whc->periodic_removed_list, list_node) {
269 qset_remove_complete(whc, qset);
270 if (qset->reset) {
271 qset_reset(whc, qset);
272 if (!list_empty(&qset->stds)) {
273 qset_insert_in_sw_list(whc, qset);
274 queue_work(whc->workqueue, &whc->periodic_work);
275 }
276 }
277 }
278
279 spin_unlock_irq(&whc->lock);
280}
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291
292int pzl_urb_enqueue(struct whc *whc, struct urb *urb, gfp_t mem_flags)
293{
294 struct whc_qset *qset;
295 int err;
296 unsigned long flags;
297
298 spin_lock_irqsave(&whc->lock, flags);
299
300 err = usb_hcd_link_urb_to_ep(&whc->wusbhc.usb_hcd, urb);
301 if (err < 0) {
302 spin_unlock_irqrestore(&whc->lock, flags);
303 return err;
304 }
305
306 qset = get_qset(whc, urb, GFP_ATOMIC);
307 if (qset == NULL)
308 err = -ENOMEM;
309 else
310 err = qset_add_urb(whc, qset, urb, GFP_ATOMIC);
311 if (!err) {
312 if (!qset->in_sw_list && !qset->remove)
313 qset_insert_in_sw_list(whc, qset);
314 } else
315 usb_hcd_unlink_urb_from_ep(&whc->wusbhc.usb_hcd, urb);
316
317 spin_unlock_irqrestore(&whc->lock, flags);
318
319 if (!err)
320 queue_work(whc->workqueue, &whc->periodic_work);
321
322 return err;
323}
324
325
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327
328
329
330
331
332
333
334
335int pzl_urb_dequeue(struct whc *whc, struct urb *urb, int status)
336{
337 struct whc_urb *wurb = urb->hcpriv;
338 struct whc_qset *qset = wurb->qset;
339 struct whc_std *std, *t;
340 bool has_qtd = false;
341 int ret;
342 unsigned long flags;
343
344 spin_lock_irqsave(&whc->lock, flags);
345
346 ret = usb_hcd_check_unlink_urb(&whc->wusbhc.usb_hcd, urb, status);
347 if (ret < 0)
348 goto out;
349
350 list_for_each_entry_safe(std, t, &qset->stds, list_node) {
351 if (std->urb == urb) {
352 if (std->qtd)
353 has_qtd = true;
354 qset_free_std(whc, std);
355 } else
356 std->qtd = NULL;
357 }
358
359 if (has_qtd) {
360 pzl_qset_remove(whc, qset);
361 update_pzl_hw_view(whc);
362 wurb->status = status;
363 wurb->is_async = false;
364 queue_work(whc->workqueue, &wurb->dequeue_work);
365 } else
366 qset_remove_urb(whc, qset, urb, status);
367out:
368 spin_unlock_irqrestore(&whc->lock, flags);
369
370 return ret;
371}
372
373
374
375
376void pzl_qset_delete(struct whc *whc, struct whc_qset *qset)
377{
378 qset->remove = 1;
379 queue_work(whc->workqueue, &whc->periodic_work);
380 qset_delete(whc, qset);
381}
382
383
384
385
386
387int pzl_init(struct whc *whc)
388{
389 int i;
390
391 whc->pz_list = dma_alloc_coherent(&whc->umc->dev, sizeof(u64) * 16,
392 &whc->pz_list_dma, GFP_KERNEL);
393 if (whc->pz_list == NULL)
394 return -ENOMEM;
395
396
397 for (i = 0; i < 16; i++)
398 whc->pz_list[i] = cpu_to_le64(QH_LINK_NTDS(8) | QH_LINK_T);
399
400 le_writeq(whc->pz_list_dma, whc->base + WUSBPERIODICLISTBASE);
401
402 return 0;
403}
404
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409
410
411void pzl_clean_up(struct whc *whc)
412{
413 if (whc->pz_list)
414 dma_free_coherent(&whc->umc->dev, sizeof(u64) * 16, whc->pz_list,
415 whc->pz_list_dma);
416}
417