1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
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 qset_get_next_prev(struct whc *whc, struct whc_qset *qset,
28 struct whc_qset **next, struct whc_qset **prev)
29{
30 struct list_head *n, *p;
31
32 BUG_ON(list_empty(&whc->async_list));
33
34 n = qset->list_node.next;
35 if (n == &whc->async_list)
36 n = n->next;
37 p = qset->list_node.prev;
38 if (p == &whc->async_list)
39 p = p->prev;
40
41 *next = container_of(n, struct whc_qset, list_node);
42 *prev = container_of(p, struct whc_qset, list_node);
43
44}
45
46static void asl_qset_insert_begin(struct whc *whc, struct whc_qset *qset)
47{
48 list_move(&qset->list_node, &whc->async_list);
49 qset->in_sw_list = true;
50}
51
52static void asl_qset_insert(struct whc *whc, struct whc_qset *qset)
53{
54 struct whc_qset *next, *prev;
55
56 qset_clear(whc, qset);
57
58
59 qset_get_next_prev(whc, qset, &next, &prev);
60 whc_qset_set_link_ptr(&qset->qh.link, next->qset_dma);
61 whc_qset_set_link_ptr(&prev->qh.link, qset->qset_dma);
62 qset->in_hw_list = true;
63}
64
65static void asl_qset_remove(struct whc *whc, struct whc_qset *qset)
66{
67 struct whc_qset *prev, *next;
68
69 qset_get_next_prev(whc, qset, &next, &prev);
70
71 list_move(&qset->list_node, &whc->async_removed_list);
72 qset->in_sw_list = false;
73
74
75
76
77
78 if (list_empty(&whc->async_list))
79 return;
80
81
82 whc_qset_set_link_ptr(&prev->qh.link, next->qset_dma);
83 qset->in_hw_list = false;
84}
85
86
87
88
89
90
91
92
93
94
95
96static uint32_t process_qset(struct whc *whc, struct whc_qset *qset)
97{
98 enum whc_update update = 0;
99 uint32_t status = 0;
100
101 while (qset->ntds) {
102 struct whc_qtd *td;
103 int t;
104
105 t = qset->td_start;
106 td = &qset->qtd[qset->td_start];
107 status = le32_to_cpu(td->status);
108
109
110
111
112 if (status & QTD_STS_ACTIVE)
113 break;
114
115 if (status & QTD_STS_HALTED) {
116
117 process_halted_qtd(whc, qset, td);
118
119
120
121 update |= WHC_UPDATE_UPDATED;
122 goto done;
123 }
124
125
126 process_inactive_qtd(whc, qset, td);
127 }
128
129 if (!qset->remove)
130 update |= qset_add_qtds(whc, qset);
131
132done:
133
134
135
136
137 if (qset->remove && qset->ntds == 0) {
138 asl_qset_remove(whc, qset);
139 update |= WHC_UPDATE_REMOVED;
140 }
141 return update;
142}
143
144void asl_start(struct whc *whc)
145{
146 struct whc_qset *qset;
147
148 qset = list_first_entry(&whc->async_list, struct whc_qset, list_node);
149
150 le_writeq(qset->qset_dma | QH_LINK_NTDS(8), whc->base + WUSBASYNCLISTADDR);
151
152 whc_write_wusbcmd(whc, WUSBCMD_ASYNC_EN, WUSBCMD_ASYNC_EN);
153 whci_wait_for(&whc->umc->dev, whc->base + WUSBSTS,
154 WUSBSTS_ASYNC_SCHED, WUSBSTS_ASYNC_SCHED,
155 1000, "start ASL");
156}
157
158void asl_stop(struct whc *whc)
159{
160 whc_write_wusbcmd(whc, WUSBCMD_ASYNC_EN, 0);
161 whci_wait_for(&whc->umc->dev, whc->base + WUSBSTS,
162 WUSBSTS_ASYNC_SCHED, 0,
163 1000, "stop ASL");
164}
165
166
167
168
169
170
171
172
173
174
175void asl_update(struct whc *whc, uint32_t wusbcmd)
176{
177 struct wusbhc *wusbhc = &whc->wusbhc;
178 long t;
179
180 mutex_lock(&wusbhc->mutex);
181 if (wusbhc->active) {
182 whc_write_wusbcmd(whc, wusbcmd, wusbcmd);
183 t = wait_event_timeout(
184 whc->async_list_wq,
185 (le_readl(whc->base + WUSBCMD) & WUSBCMD_ASYNC_UPDATED) == 0,
186 msecs_to_jiffies(1000));
187 if (t == 0)
188 whc_hw_error(whc, "ASL update timeout");
189 }
190 mutex_unlock(&wusbhc->mutex);
191}
192
193
194
195
196
197
198
199
200
201void scan_async_work(struct work_struct *work)
202{
203 struct whc *whc = container_of(work, struct whc, async_work);
204 struct whc_qset *qset, *t;
205 enum whc_update update = 0;
206
207 spin_lock_irq(&whc->lock);
208
209
210
211
212
213 list_for_each_entry_safe_reverse(qset, t, &whc->async_list, list_node) {
214 if (!qset->in_hw_list) {
215 asl_qset_insert(whc, qset);
216 update |= WHC_UPDATE_ADDED;
217 }
218
219 update |= process_qset(whc, qset);
220 }
221
222 spin_unlock_irq(&whc->lock);
223
224 if (update) {
225 uint32_t wusbcmd = WUSBCMD_ASYNC_UPDATED | WUSBCMD_ASYNC_SYNCED_DB;
226 if (update & WHC_UPDATE_REMOVED)
227 wusbcmd |= WUSBCMD_ASYNC_QSET_RM;
228 asl_update(whc, wusbcmd);
229 }
230
231
232
233
234
235
236
237
238 spin_lock_irq(&whc->lock);
239
240 list_for_each_entry_safe(qset, t, &whc->async_removed_list, list_node) {
241 qset_remove_complete(whc, qset);
242 if (qset->reset) {
243 qset_reset(whc, qset);
244 if (!list_empty(&qset->stds)) {
245 asl_qset_insert_begin(whc, qset);
246 queue_work(whc->workqueue, &whc->async_work);
247 }
248 }
249 }
250
251 spin_unlock_irq(&whc->lock);
252}
253
254
255
256
257
258
259
260
261
262
263
264int asl_urb_enqueue(struct whc *whc, struct urb *urb, gfp_t mem_flags)
265{
266 struct whc_qset *qset;
267 int err;
268 unsigned long flags;
269
270 spin_lock_irqsave(&whc->lock, flags);
271
272 err = usb_hcd_link_urb_to_ep(&whc->wusbhc.usb_hcd, urb);
273 if (err < 0) {
274 spin_unlock_irqrestore(&whc->lock, flags);
275 return err;
276 }
277
278 qset = get_qset(whc, urb, GFP_ATOMIC);
279 if (qset == NULL)
280 err = -ENOMEM;
281 else
282 err = qset_add_urb(whc, qset, urb, GFP_ATOMIC);
283 if (!err) {
284 if (!qset->in_sw_list && !qset->remove)
285 asl_qset_insert_begin(whc, qset);
286 } else
287 usb_hcd_unlink_urb_from_ep(&whc->wusbhc.usb_hcd, urb);
288
289 spin_unlock_irqrestore(&whc->lock, flags);
290
291 if (!err)
292 queue_work(whc->workqueue, &whc->async_work);
293
294 return err;
295}
296
297
298
299
300
301
302
303
304
305
306
307int asl_urb_dequeue(struct whc *whc, struct urb *urb, int status)
308{
309 struct whc_urb *wurb = urb->hcpriv;
310 struct whc_qset *qset = wurb->qset;
311 struct whc_std *std, *t;
312 bool has_qtd = false;
313 int ret;
314 unsigned long flags;
315
316 spin_lock_irqsave(&whc->lock, flags);
317
318 ret = usb_hcd_check_unlink_urb(&whc->wusbhc.usb_hcd, urb, status);
319 if (ret < 0)
320 goto out;
321
322 list_for_each_entry_safe(std, t, &qset->stds, list_node) {
323 if (std->urb == urb) {
324 if (std->qtd)
325 has_qtd = true;
326 qset_free_std(whc, std);
327 } else
328 std->qtd = NULL;
329 }
330
331 if (has_qtd) {
332 asl_qset_remove(whc, qset);
333 wurb->status = status;
334 wurb->is_async = true;
335 queue_work(whc->workqueue, &wurb->dequeue_work);
336 } else
337 qset_remove_urb(whc, qset, urb, status);
338out:
339 spin_unlock_irqrestore(&whc->lock, flags);
340
341 return ret;
342}
343
344
345
346
347void asl_qset_delete(struct whc *whc, struct whc_qset *qset)
348{
349 qset->remove = 1;
350 queue_work(whc->workqueue, &whc->async_work);
351 qset_delete(whc, qset);
352}
353
354
355
356
357
358
359
360int asl_init(struct whc *whc)
361{
362 struct whc_qset *qset;
363
364 qset = qset_alloc(whc, GFP_KERNEL);
365 if (qset == NULL)
366 return -ENOMEM;
367
368 asl_qset_insert_begin(whc, qset);
369 asl_qset_insert(whc, qset);
370
371 return 0;
372}
373
374
375
376
377
378
379void asl_clean_up(struct whc *whc)
380{
381 struct whc_qset *qset;
382
383 if (!list_empty(&whc->async_list)) {
384 qset = list_first_entry(&whc->async_list, struct whc_qset, list_node);
385 list_del(&qset->list_node);
386 qset_free(whc, qset);
387 }
388}
389