Commit | Line | Data |
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e8d548d5 KM |
1 | /* |
2 | * Renesas USB driver | |
3 | * | |
4 | * Copyright (C) 2011 Renesas Solutions Corp. | |
5 | * Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> | |
6 | * | |
7 | * This program is distributed in the hope that it will be useful, | |
8 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
9 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
10 | * GNU General Public License for more details. | |
11 | * | |
12 | * You should have received a copy of the GNU General Public License | |
13 | * along with this program; if not, write to the Free Software | |
14 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
15 | * | |
16 | */ | |
17 | #include <linux/delay.h> | |
18 | #include <linux/io.h> | |
9c646cfc | 19 | #include <linux/scatterlist.h> |
cc502bb7 PB |
20 | #include "common.h" |
21 | #include "pipe.h" | |
e8d548d5 | 22 | |
d3af90a5 | 23 | #define usbhsf_get_cfifo(p) (&((p)->fifo_info.cfifo)) |
5ea43994 | 24 | #define usbhsf_is_cfifo(p, f) (usbhsf_get_cfifo(p) == f) |
d3af90a5 | 25 | |
d77e3f4e KM |
26 | #define usbhsf_fifo_is_busy(f) ((f)->pipe) /* see usbhs_pipe_select_fifo */ |
27 | ||
4bd04811 | 28 | /* |
233f519d KM |
29 | * packet initialize |
30 | */ | |
31 | void usbhs_pkt_init(struct usbhs_pkt *pkt) | |
32 | { | |
233f519d KM |
33 | INIT_LIST_HEAD(&pkt->node); |
34 | } | |
35 | ||
36 | /* | |
37 | * packet control function | |
4bd04811 | 38 | */ |
97664a20 | 39 | static int usbhsf_null_handle(struct usbhs_pkt *pkt, int *is_done) |
dad67397 KM |
40 | { |
41 | struct usbhs_priv *priv = usbhs_pipe_to_priv(pkt->pipe); | |
42 | struct device *dev = usbhs_priv_to_dev(priv); | |
43 | ||
44 | dev_err(dev, "null handler\n"); | |
45 | ||
46 | return -EINVAL; | |
47 | } | |
48 | ||
fcb42e23 | 49 | static const struct usbhs_pkt_handle usbhsf_null_handler = { |
dad67397 KM |
50 | .prepare = usbhsf_null_handle, |
51 | .try_run = usbhsf_null_handle, | |
52 | }; | |
53 | ||
659d4954 | 54 | void usbhs_pkt_push(struct usbhs_pipe *pipe, struct usbhs_pkt *pkt, |
b331872b KM |
55 | void (*done)(struct usbhs_priv *priv, |
56 | struct usbhs_pkt *pkt), | |
3edeee38 | 57 | void *buf, int len, int zero, int sequence) |
6acb95d4 | 58 | { |
dad67397 KM |
59 | struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe); |
60 | struct device *dev = usbhs_priv_to_dev(priv); | |
97664a20 KM |
61 | unsigned long flags; |
62 | ||
b331872b KM |
63 | if (!done) { |
64 | dev_err(dev, "no done function\n"); | |
65 | return; | |
66 | } | |
67 | ||
a2c76b83 KM |
68 | /******************** spin lock ********************/ |
69 | usbhs_lock(priv, flags); | |
70 | ||
0c6ef985 | 71 | if (!pipe->handler) { |
dad67397 | 72 | dev_err(dev, "no handler function\n"); |
0c6ef985 | 73 | pipe->handler = &usbhsf_null_handler; |
dad67397 KM |
74 | } |
75 | ||
d5261286 | 76 | list_move_tail(&pkt->node, &pipe->list); |
6acb95d4 | 77 | |
0c6ef985 KM |
78 | /* |
79 | * each pkt must hold own handler. | |
80 | * because handler might be changed by its situation. | |
81 | * dma handler -> pio handler. | |
82 | */ | |
659d4954 KM |
83 | pkt->pipe = pipe; |
84 | pkt->buf = buf; | |
0c6ef985 | 85 | pkt->handler = pipe->handler; |
659d4954 KM |
86 | pkt->length = len; |
87 | pkt->zero = zero; | |
88 | pkt->actual = 0; | |
b331872b | 89 | pkt->done = done; |
3edeee38 | 90 | pkt->sequence = sequence; |
97664a20 KM |
91 | |
92 | usbhs_unlock(priv, flags); | |
93 | /******************** spin unlock ******************/ | |
6acb95d4 KM |
94 | } |
95 | ||
97664a20 | 96 | static void __usbhsf_pkt_del(struct usbhs_pkt *pkt) |
6acb95d4 KM |
97 | { |
98 | list_del_init(&pkt->node); | |
99 | } | |
100 | ||
97664a20 | 101 | static struct usbhs_pkt *__usbhsf_pkt_get(struct usbhs_pipe *pipe) |
6acb95d4 | 102 | { |
31faf878 | 103 | return list_first_entry_or_null(&pipe->list, struct usbhs_pkt, node); |
6acb95d4 KM |
104 | } |
105 | ||
2743e7f9 YS |
106 | static void usbhsf_fifo_clear(struct usbhs_pipe *pipe, |
107 | struct usbhs_fifo *fifo); | |
108 | static void usbhsf_fifo_unselect(struct usbhs_pipe *pipe, | |
109 | struct usbhs_fifo *fifo); | |
110 | static struct dma_chan *usbhsf_dma_chan_get(struct usbhs_fifo *fifo, | |
111 | struct usbhs_pkt *pkt); | |
112 | #define usbhsf_dma_map(p) __usbhsf_dma_map_ctrl(p, 1) | |
113 | #define usbhsf_dma_unmap(p) __usbhsf_dma_map_ctrl(p, 0) | |
114 | static int __usbhsf_dma_map_ctrl(struct usbhs_pkt *pkt, int map); | |
97664a20 KM |
115 | struct usbhs_pkt *usbhs_pkt_pop(struct usbhs_pipe *pipe, struct usbhs_pkt *pkt) |
116 | { | |
117 | struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe); | |
2743e7f9 | 118 | struct usbhs_fifo *fifo = usbhs_pipe_to_fifo(pipe); |
97664a20 KM |
119 | unsigned long flags; |
120 | ||
121 | /******************** spin lock ********************/ | |
122 | usbhs_lock(priv, flags); | |
123 | ||
2743e7f9 YS |
124 | usbhs_pipe_disable(pipe); |
125 | ||
97664a20 KM |
126 | if (!pkt) |
127 | pkt = __usbhsf_pkt_get(pipe); | |
128 | ||
2743e7f9 YS |
129 | if (pkt) { |
130 | struct dma_chan *chan = NULL; | |
131 | ||
132 | if (fifo) | |
133 | chan = usbhsf_dma_chan_get(fifo, pkt); | |
134 | if (chan) { | |
135 | dmaengine_terminate_all(chan); | |
136 | usbhsf_fifo_clear(pipe, fifo); | |
137 | usbhsf_dma_unmap(pkt); | |
138 | } | |
139 | ||
97664a20 | 140 | __usbhsf_pkt_del(pkt); |
2743e7f9 YS |
141 | } |
142 | ||
143 | if (fifo) | |
144 | usbhsf_fifo_unselect(pipe, fifo); | |
97664a20 KM |
145 | |
146 | usbhs_unlock(priv, flags); | |
147 | /******************** spin unlock ******************/ | |
148 | ||
149 | return pkt; | |
150 | } | |
151 | ||
51b8a021 KM |
152 | enum { |
153 | USBHSF_PKT_PREPARE, | |
154 | USBHSF_PKT_TRY_RUN, | |
155 | USBHSF_PKT_DMA_DONE, | |
156 | }; | |
157 | ||
158 | static int usbhsf_pkt_handler(struct usbhs_pipe *pipe, int type) | |
97664a20 KM |
159 | { |
160 | struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe); | |
97664a20 KM |
161 | struct usbhs_pkt *pkt; |
162 | struct device *dev = usbhs_priv_to_dev(priv); | |
163 | int (*func)(struct usbhs_pkt *pkt, int *is_done); | |
164 | unsigned long flags; | |
165 | int ret = 0; | |
166 | int is_done = 0; | |
167 | ||
168 | /******************** spin lock ********************/ | |
169 | usbhs_lock(priv, flags); | |
170 | ||
171 | pkt = __usbhsf_pkt_get(pipe); | |
172 | if (!pkt) | |
173 | goto __usbhs_pkt_handler_end; | |
174 | ||
175 | switch (type) { | |
176 | case USBHSF_PKT_PREPARE: | |
177 | func = pkt->handler->prepare; | |
178 | break; | |
179 | case USBHSF_PKT_TRY_RUN: | |
180 | func = pkt->handler->try_run; | |
181 | break; | |
e73a9891 KM |
182 | case USBHSF_PKT_DMA_DONE: |
183 | func = pkt->handler->dma_done; | |
184 | break; | |
97664a20 | 185 | default: |
984e833c | 186 | dev_err(dev, "unknown pkt handler\n"); |
97664a20 KM |
187 | goto __usbhs_pkt_handler_end; |
188 | } | |
189 | ||
894f2fc4 YS |
190 | if (likely(func)) |
191 | ret = func(pkt, &is_done); | |
97664a20 KM |
192 | |
193 | if (is_done) | |
194 | __usbhsf_pkt_del(pkt); | |
195 | ||
196 | __usbhs_pkt_handler_end: | |
197 | usbhs_unlock(priv, flags); | |
198 | /******************** spin unlock ******************/ | |
199 | ||
0432eed0 | 200 | if (is_done) { |
b331872b | 201 | pkt->done(priv, pkt); |
0432eed0 KM |
202 | usbhs_pkt_start(pipe); |
203 | } | |
97664a20 KM |
204 | |
205 | return ret; | |
206 | } | |
207 | ||
51b8a021 KM |
208 | void usbhs_pkt_start(struct usbhs_pipe *pipe) |
209 | { | |
210 | usbhsf_pkt_handler(pipe, USBHSF_PKT_PREPARE); | |
211 | } | |
212 | ||
659d4954 KM |
213 | /* |
214 | * irq enable/disable function | |
215 | */ | |
3192fcb2 KM |
216 | #define usbhsf_irq_empty_ctrl(p, e) usbhsf_irq_callback_ctrl(p, irq_bempsts, e) |
217 | #define usbhsf_irq_ready_ctrl(p, e) usbhsf_irq_callback_ctrl(p, irq_brdysts, e) | |
659d4954 KM |
218 | #define usbhsf_irq_callback_ctrl(pipe, status, enable) \ |
219 | ({ \ | |
220 | struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe); \ | |
221 | struct usbhs_mod *mod = usbhs_mod_get_current(priv); \ | |
222 | u16 status = (1 << usbhs_pipe_number(pipe)); \ | |
223 | if (!mod) \ | |
224 | return; \ | |
225 | if (enable) \ | |
3192fcb2 | 226 | mod->status |= status; \ |
659d4954 | 227 | else \ |
3192fcb2 | 228 | mod->status &= ~status; \ |
659d4954 KM |
229 | usbhs_irq_callback_update(priv, mod); \ |
230 | }) | |
231 | ||
232 | static void usbhsf_tx_irq_ctrl(struct usbhs_pipe *pipe, int enable) | |
233 | { | |
234 | /* | |
235 | * And DCP pipe can NOT use "ready interrupt" for "send" | |
236 | * it should use "empty" interrupt. | |
237 | * see | |
238 | * "Operation" - "Interrupt Function" - "BRDY Interrupt" | |
239 | * | |
240 | * on the other hand, normal pipe can use "ready interrupt" for "send" | |
241 | * even though it is single/double buffer | |
242 | */ | |
243 | if (usbhs_pipe_is_dcp(pipe)) | |
244 | usbhsf_irq_empty_ctrl(pipe, enable); | |
245 | else | |
246 | usbhsf_irq_ready_ctrl(pipe, enable); | |
247 | } | |
248 | ||
249 | static void usbhsf_rx_irq_ctrl(struct usbhs_pipe *pipe, int enable) | |
250 | { | |
251 | usbhsf_irq_ready_ctrl(pipe, enable); | |
252 | } | |
253 | ||
e8d548d5 KM |
254 | /* |
255 | * FIFO ctrl | |
256 | */ | |
d3af90a5 KM |
257 | static void usbhsf_send_terminator(struct usbhs_pipe *pipe, |
258 | struct usbhs_fifo *fifo) | |
e8d548d5 KM |
259 | { |
260 | struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe); | |
261 | ||
d3af90a5 | 262 | usbhs_bset(priv, fifo->ctr, BVAL, BVAL); |
e8d548d5 KM |
263 | } |
264 | ||
d3af90a5 KM |
265 | static int usbhsf_fifo_barrier(struct usbhs_priv *priv, |
266 | struct usbhs_fifo *fifo) | |
e8d548d5 KM |
267 | { |
268 | int timeout = 1024; | |
269 | ||
270 | do { | |
271 | /* The FIFO port is accessible */ | |
d3af90a5 | 272 | if (usbhs_read(priv, fifo->ctr) & FRDY) |
e8d548d5 KM |
273 | return 0; |
274 | ||
275 | udelay(10); | |
276 | } while (timeout--); | |
277 | ||
278 | return -EBUSY; | |
279 | } | |
280 | ||
d3af90a5 KM |
281 | static void usbhsf_fifo_clear(struct usbhs_pipe *pipe, |
282 | struct usbhs_fifo *fifo) | |
e8d548d5 KM |
283 | { |
284 | struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe); | |
285 | ||
286 | if (!usbhs_pipe_is_dcp(pipe)) | |
d3af90a5 | 287 | usbhsf_fifo_barrier(priv, fifo); |
e8d548d5 | 288 | |
d3af90a5 | 289 | usbhs_write(priv, fifo->ctr, BCLR); |
e8d548d5 KM |
290 | } |
291 | ||
d3af90a5 KM |
292 | static int usbhsf_fifo_rcv_len(struct usbhs_priv *priv, |
293 | struct usbhs_fifo *fifo) | |
e8d548d5 | 294 | { |
d3af90a5 | 295 | return usbhs_read(priv, fifo->ctr) & DTLN_MASK; |
e8d548d5 KM |
296 | } |
297 | ||
d77e3f4e KM |
298 | static void usbhsf_fifo_unselect(struct usbhs_pipe *pipe, |
299 | struct usbhs_fifo *fifo) | |
300 | { | |
301 | struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe); | |
302 | ||
303 | usbhs_pipe_select_fifo(pipe, NULL); | |
304 | usbhs_write(priv, fifo->sel, 0); | |
305 | } | |
306 | ||
d3af90a5 KM |
307 | static int usbhsf_fifo_select(struct usbhs_pipe *pipe, |
308 | struct usbhs_fifo *fifo, | |
309 | int write) | |
e8d548d5 KM |
310 | { |
311 | struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe); | |
312 | struct device *dev = usbhs_priv_to_dev(priv); | |
313 | int timeout = 1024; | |
314 | u16 mask = ((1 << 5) | 0xF); /* mask of ISEL | CURPIPE */ | |
315 | u16 base = usbhs_pipe_number(pipe); /* CURPIPE */ | |
316 | ||
d77e3f4e KM |
317 | if (usbhs_pipe_is_busy(pipe) || |
318 | usbhsf_fifo_is_busy(fifo)) | |
319 | return -EBUSY; | |
320 | ||
92352071 | 321 | if (usbhs_pipe_is_dcp(pipe)) { |
e8d548d5 KM |
322 | base |= (1 == write) << 5; /* ISEL */ |
323 | ||
92352071 KM |
324 | if (usbhs_mod_is_host(priv)) |
325 | usbhs_dcp_dir_for_host(pipe, write); | |
326 | } | |
327 | ||
e8d548d5 | 328 | /* "base" will be used below */ |
5ea43994 SY |
329 | if (usbhs_get_dparam(priv, has_sudmac) && !usbhsf_is_cfifo(priv, fifo)) |
330 | usbhs_write(priv, fifo->sel, base); | |
331 | else | |
332 | usbhs_write(priv, fifo->sel, base | MBW_32); | |
e8d548d5 KM |
333 | |
334 | /* check ISEL and CURPIPE value */ | |
335 | while (timeout--) { | |
d77e3f4e KM |
336 | if (base == (mask & usbhs_read(priv, fifo->sel))) { |
337 | usbhs_pipe_select_fifo(pipe, fifo); | |
e8d548d5 | 338 | return 0; |
d77e3f4e | 339 | } |
e8d548d5 KM |
340 | udelay(10); |
341 | } | |
342 | ||
343 | dev_err(dev, "fifo select error\n"); | |
344 | ||
345 | return -EIO; | |
346 | } | |
347 | ||
9e74d601 KM |
348 | /* |
349 | * DCP status stage | |
350 | */ | |
351 | static int usbhs_dcp_dir_switch_to_write(struct usbhs_pkt *pkt, int *is_done) | |
352 | { | |
353 | struct usbhs_pipe *pipe = pkt->pipe; | |
354 | struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe); | |
355 | struct usbhs_fifo *fifo = usbhsf_get_cfifo(priv); /* CFIFO */ | |
356 | struct device *dev = usbhs_priv_to_dev(priv); | |
357 | int ret; | |
358 | ||
359 | usbhs_pipe_disable(pipe); | |
360 | ||
361 | ret = usbhsf_fifo_select(pipe, fifo, 1); | |
362 | if (ret < 0) { | |
363 | dev_err(dev, "%s() faile\n", __func__); | |
364 | return ret; | |
365 | } | |
366 | ||
367 | usbhs_pipe_sequence_data1(pipe); /* DATA1 */ | |
368 | ||
369 | usbhsf_fifo_clear(pipe, fifo); | |
370 | usbhsf_send_terminator(pipe, fifo); | |
371 | ||
372 | usbhsf_fifo_unselect(pipe, fifo); | |
373 | ||
374 | usbhsf_tx_irq_ctrl(pipe, 1); | |
375 | usbhs_pipe_enable(pipe); | |
376 | ||
377 | return ret; | |
378 | } | |
379 | ||
380 | static int usbhs_dcp_dir_switch_to_read(struct usbhs_pkt *pkt, int *is_done) | |
381 | { | |
382 | struct usbhs_pipe *pipe = pkt->pipe; | |
383 | struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe); | |
384 | struct usbhs_fifo *fifo = usbhsf_get_cfifo(priv); /* CFIFO */ | |
385 | struct device *dev = usbhs_priv_to_dev(priv); | |
386 | int ret; | |
387 | ||
388 | usbhs_pipe_disable(pipe); | |
389 | ||
390 | ret = usbhsf_fifo_select(pipe, fifo, 0); | |
391 | if (ret < 0) { | |
392 | dev_err(dev, "%s() fail\n", __func__); | |
393 | return ret; | |
394 | } | |
395 | ||
396 | usbhs_pipe_sequence_data1(pipe); /* DATA1 */ | |
397 | usbhsf_fifo_clear(pipe, fifo); | |
398 | ||
399 | usbhsf_fifo_unselect(pipe, fifo); | |
400 | ||
401 | usbhsf_rx_irq_ctrl(pipe, 1); | |
402 | usbhs_pipe_enable(pipe); | |
403 | ||
404 | return ret; | |
405 | ||
406 | } | |
407 | ||
408 | static int usbhs_dcp_dir_switch_done(struct usbhs_pkt *pkt, int *is_done) | |
409 | { | |
410 | struct usbhs_pipe *pipe = pkt->pipe; | |
411 | ||
412 | if (pkt->handler == &usbhs_dcp_status_stage_in_handler) | |
413 | usbhsf_tx_irq_ctrl(pipe, 0); | |
414 | else | |
415 | usbhsf_rx_irq_ctrl(pipe, 0); | |
416 | ||
417 | pkt->actual = pkt->length; | |
418 | *is_done = 1; | |
419 | ||
420 | return 0; | |
421 | } | |
422 | ||
fcb42e23 | 423 | const struct usbhs_pkt_handle usbhs_dcp_status_stage_in_handler = { |
9e74d601 KM |
424 | .prepare = usbhs_dcp_dir_switch_to_write, |
425 | .try_run = usbhs_dcp_dir_switch_done, | |
426 | }; | |
427 | ||
fcb42e23 | 428 | const struct usbhs_pkt_handle usbhs_dcp_status_stage_out_handler = { |
9e74d601 KM |
429 | .prepare = usbhs_dcp_dir_switch_to_read, |
430 | .try_run = usbhs_dcp_dir_switch_done, | |
431 | }; | |
432 | ||
433 | /* | |
434 | * DCP data stage (push) | |
435 | */ | |
436 | static int usbhsf_dcp_data_stage_try_push(struct usbhs_pkt *pkt, int *is_done) | |
437 | { | |
438 | struct usbhs_pipe *pipe = pkt->pipe; | |
439 | ||
440 | usbhs_pipe_sequence_data1(pipe); /* DATA1 */ | |
441 | ||
442 | /* | |
443 | * change handler to PIO push | |
444 | */ | |
445 | pkt->handler = &usbhs_fifo_pio_push_handler; | |
446 | ||
447 | return pkt->handler->prepare(pkt, is_done); | |
448 | } | |
449 | ||
fcb42e23 | 450 | const struct usbhs_pkt_handle usbhs_dcp_data_stage_out_handler = { |
9e74d601 KM |
451 | .prepare = usbhsf_dcp_data_stage_try_push, |
452 | }; | |
453 | ||
454 | /* | |
455 | * DCP data stage (pop) | |
456 | */ | |
457 | static int usbhsf_dcp_data_stage_prepare_pop(struct usbhs_pkt *pkt, | |
458 | int *is_done) | |
459 | { | |
460 | struct usbhs_pipe *pipe = pkt->pipe; | |
461 | struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe); | |
462 | struct usbhs_fifo *fifo = usbhsf_get_cfifo(priv); | |
463 | ||
464 | if (usbhs_pipe_is_busy(pipe)) | |
465 | return 0; | |
466 | ||
467 | /* | |
468 | * prepare pop for DCP should | |
469 | * - change DCP direction, | |
470 | * - clear fifo | |
471 | * - DATA1 | |
472 | */ | |
473 | usbhs_pipe_disable(pipe); | |
474 | ||
475 | usbhs_pipe_sequence_data1(pipe); /* DATA1 */ | |
476 | ||
477 | usbhsf_fifo_select(pipe, fifo, 0); | |
478 | usbhsf_fifo_clear(pipe, fifo); | |
479 | usbhsf_fifo_unselect(pipe, fifo); | |
480 | ||
481 | /* | |
482 | * change handler to PIO pop | |
483 | */ | |
484 | pkt->handler = &usbhs_fifo_pio_pop_handler; | |
485 | ||
486 | return pkt->handler->prepare(pkt, is_done); | |
487 | } | |
488 | ||
fcb42e23 | 489 | const struct usbhs_pkt_handle usbhs_dcp_data_stage_in_handler = { |
9e74d601 KM |
490 | .prepare = usbhsf_dcp_data_stage_prepare_pop, |
491 | }; | |
492 | ||
e8d548d5 | 493 | /* |
233f519d | 494 | * PIO push handler |
e8d548d5 | 495 | */ |
0cb7e61d | 496 | static int usbhsf_pio_try_push(struct usbhs_pkt *pkt, int *is_done) |
e8d548d5 | 497 | { |
4bd04811 | 498 | struct usbhs_pipe *pipe = pkt->pipe; |
e8d548d5 | 499 | struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe); |
659d4954 | 500 | struct device *dev = usbhs_priv_to_dev(priv); |
d3af90a5 KM |
501 | struct usbhs_fifo *fifo = usbhsf_get_cfifo(priv); /* CFIFO */ |
502 | void __iomem *addr = priv->base + fifo->port; | |
659d4954 | 503 | u8 *buf; |
e8d548d5 KM |
504 | int maxp = usbhs_pipe_get_maxpacket(pipe); |
505 | int total_len; | |
4bd04811 | 506 | int i, ret, len; |
97664a20 | 507 | int is_short; |
e8d548d5 | 508 | |
3edeee38 KM |
509 | usbhs_pipe_data_sequence(pipe, pkt->sequence); |
510 | pkt->sequence = -1; /* -1 sequence will be ignored */ | |
511 | ||
1c90ee0b KM |
512 | usbhs_pipe_set_trans_count_if_bulk(pipe, pkt->length); |
513 | ||
d3af90a5 | 514 | ret = usbhsf_fifo_select(pipe, fifo, 1); |
e8d548d5 | 515 | if (ret < 0) |
d77e3f4e | 516 | return 0; |
e8d548d5 | 517 | |
dad67397 | 518 | ret = usbhs_pipe_is_accessible(pipe); |
4ef85e0f KM |
519 | if (ret < 0) { |
520 | /* inaccessible pipe is not an error */ | |
521 | ret = 0; | |
659d4954 | 522 | goto usbhs_fifo_write_busy; |
4ef85e0f | 523 | } |
e8d548d5 | 524 | |
d3af90a5 | 525 | ret = usbhsf_fifo_barrier(priv, fifo); |
e8d548d5 | 526 | if (ret < 0) |
659d4954 | 527 | goto usbhs_fifo_write_busy; |
e8d548d5 | 528 | |
659d4954 KM |
529 | buf = pkt->buf + pkt->actual; |
530 | len = pkt->length - pkt->actual; | |
531 | len = min(len, maxp); | |
532 | total_len = len; | |
533 | is_short = total_len < maxp; | |
e8d548d5 KM |
534 | |
535 | /* | |
536 | * FIXME | |
537 | * | |
538 | * 32-bit access only | |
539 | */ | |
659d4954 | 540 | if (len >= 4 && !((unsigned long)buf & 0x03)) { |
e8d548d5 KM |
541 | iowrite32_rep(addr, buf, len / 4); |
542 | len %= 4; | |
543 | buf += total_len - len; | |
544 | } | |
545 | ||
546 | /* the rest operation */ | |
547 | for (i = 0; i < len; i++) | |
548 | iowrite8(buf[i], addr + (0x03 - (i & 0x03))); | |
549 | ||
659d4954 KM |
550 | /* |
551 | * variable update | |
552 | */ | |
553 | pkt->actual += total_len; | |
554 | ||
555 | if (pkt->actual < pkt->length) | |
97664a20 | 556 | *is_done = 0; /* there are remainder data */ |
659d4954 | 557 | else if (is_short) |
97664a20 | 558 | *is_done = 1; /* short packet */ |
659d4954 | 559 | else |
97664a20 | 560 | *is_done = !pkt->zero; /* send zero packet ? */ |
659d4954 KM |
561 | |
562 | /* | |
563 | * pipe/irq handling | |
564 | */ | |
565 | if (is_short) | |
d3af90a5 | 566 | usbhsf_send_terminator(pipe, fifo); |
e8d548d5 | 567 | |
97664a20 | 568 | usbhsf_tx_irq_ctrl(pipe, !*is_done); |
8355b2b3 | 569 | usbhs_pipe_running(pipe, !*is_done); |
4bd04811 KM |
570 | usbhs_pipe_enable(pipe); |
571 | ||
659d4954 KM |
572 | dev_dbg(dev, " send %d (%d/ %d/ %d/ %d)\n", |
573 | usbhs_pipe_number(pipe), | |
97664a20 | 574 | pkt->length, pkt->actual, *is_done, pkt->zero); |
659d4954 | 575 | |
d77e3f4e KM |
576 | usbhsf_fifo_unselect(pipe, fifo); |
577 | ||
4bd04811 | 578 | return 0; |
659d4954 KM |
579 | |
580 | usbhs_fifo_write_busy: | |
d77e3f4e KM |
581 | usbhsf_fifo_unselect(pipe, fifo); |
582 | ||
659d4954 KM |
583 | /* |
584 | * pipe is busy. | |
585 | * retry in interrupt | |
586 | */ | |
587 | usbhsf_tx_irq_ctrl(pipe, 1); | |
8355b2b3 | 588 | usbhs_pipe_running(pipe, 1); |
659d4954 KM |
589 | |
590 | return ret; | |
e8d548d5 KM |
591 | } |
592 | ||
8355b2b3 YS |
593 | static int usbhsf_pio_prepare_push(struct usbhs_pkt *pkt, int *is_done) |
594 | { | |
595 | if (usbhs_pipe_is_running(pkt->pipe)) | |
596 | return 0; | |
597 | ||
598 | return usbhsf_pio_try_push(pkt, is_done); | |
599 | } | |
600 | ||
fcb42e23 | 601 | const struct usbhs_pkt_handle usbhs_fifo_pio_push_handler = { |
8355b2b3 | 602 | .prepare = usbhsf_pio_prepare_push, |
0cb7e61d | 603 | .try_run = usbhsf_pio_try_push, |
dad67397 KM |
604 | }; |
605 | ||
233f519d KM |
606 | /* |
607 | * PIO pop handler | |
608 | */ | |
97664a20 | 609 | static int usbhsf_prepare_pop(struct usbhs_pkt *pkt, int *is_done) |
e8d548d5 | 610 | { |
dad67397 | 611 | struct usbhs_pipe *pipe = pkt->pipe; |
e73d42f1 KM |
612 | struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe); |
613 | struct usbhs_fifo *fifo = usbhsf_get_cfifo(priv); | |
d77e3f4e KM |
614 | |
615 | if (usbhs_pipe_is_busy(pipe)) | |
616 | return 0; | |
e8d548d5 | 617 | |
8355b2b3 YS |
618 | if (usbhs_pipe_is_running(pipe)) |
619 | return 0; | |
620 | ||
e8d548d5 | 621 | /* |
d77e3f4e | 622 | * pipe enable to prepare packet receive |
e8d548d5 | 623 | */ |
3edeee38 KM |
624 | usbhs_pipe_data_sequence(pipe, pkt->sequence); |
625 | pkt->sequence = -1; /* -1 sequence will be ignored */ | |
e8d548d5 | 626 | |
e73d42f1 KM |
627 | if (usbhs_pipe_is_dcp(pipe)) |
628 | usbhsf_fifo_clear(pipe, fifo); | |
629 | ||
1c90ee0b | 630 | usbhs_pipe_set_trans_count_if_bulk(pipe, pkt->length); |
e8d548d5 | 631 | usbhs_pipe_enable(pipe); |
8355b2b3 | 632 | usbhs_pipe_running(pipe, 1); |
659d4954 | 633 | usbhsf_rx_irq_ctrl(pipe, 1); |
e8d548d5 | 634 | |
d3af90a5 | 635 | return 0; |
e8d548d5 KM |
636 | } |
637 | ||
0cb7e61d | 638 | static int usbhsf_pio_try_pop(struct usbhs_pkt *pkt, int *is_done) |
e8d548d5 | 639 | { |
4bd04811 | 640 | struct usbhs_pipe *pipe = pkt->pipe; |
e8d548d5 | 641 | struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe); |
659d4954 | 642 | struct device *dev = usbhs_priv_to_dev(priv); |
d3af90a5 KM |
643 | struct usbhs_fifo *fifo = usbhsf_get_cfifo(priv); /* CFIFO */ |
644 | void __iomem *addr = priv->base + fifo->port; | |
659d4954 KM |
645 | u8 *buf; |
646 | u32 data = 0; | |
647 | int maxp = usbhs_pipe_get_maxpacket(pipe); | |
4bd04811 | 648 | int rcv_len, len; |
e8d548d5 | 649 | int i, ret; |
4bd04811 | 650 | int total_len = 0; |
e8d548d5 | 651 | |
d3af90a5 | 652 | ret = usbhsf_fifo_select(pipe, fifo, 0); |
e8d548d5 | 653 | if (ret < 0) |
d77e3f4e | 654 | return 0; |
e8d548d5 | 655 | |
d3af90a5 | 656 | ret = usbhsf_fifo_barrier(priv, fifo); |
e8d548d5 | 657 | if (ret < 0) |
d77e3f4e | 658 | goto usbhs_fifo_read_busy; |
e8d548d5 | 659 | |
d3af90a5 | 660 | rcv_len = usbhsf_fifo_rcv_len(priv, fifo); |
e8d548d5 | 661 | |
659d4954 KM |
662 | buf = pkt->buf + pkt->actual; |
663 | len = pkt->length - pkt->actual; | |
664 | len = min(len, rcv_len); | |
665 | total_len = len; | |
666 | ||
6ff5d09b KM |
667 | /* |
668 | * update actual length first here to decide disable pipe. | |
669 | * if this pipe keeps BUF status and all data were popped, | |
670 | * then, next interrupt/token will be issued again | |
671 | */ | |
672 | pkt->actual += total_len; | |
673 | ||
674 | if ((pkt->actual == pkt->length) || /* receive all data */ | |
675 | (total_len < maxp)) { /* short packet */ | |
676 | *is_done = 1; | |
677 | usbhsf_rx_irq_ctrl(pipe, 0); | |
8355b2b3 | 678 | usbhs_pipe_running(pipe, 0); |
93fb9127 YS |
679 | /* |
680 | * If function mode, since this controller is possible to enter | |
681 | * Control Write status stage at this timing, this driver | |
682 | * should not disable the pipe. If such a case happens, this | |
683 | * controller is not able to complete the status stage. | |
684 | */ | |
685 | if (!usbhs_mod_is_host(priv) && !usbhs_pipe_is_dcp(pipe)) | |
686 | usbhs_pipe_disable(pipe); /* disable pipe first */ | |
6ff5d09b KM |
687 | } |
688 | ||
e8d548d5 KM |
689 | /* |
690 | * Buffer clear if Zero-Length packet | |
691 | * | |
692 | * see | |
693 | * "Operation" - "FIFO Buffer Memory" - "FIFO Port Function" | |
694 | */ | |
695 | if (0 == rcv_len) { | |
3edeee38 | 696 | pkt->zero = 1; |
d3af90a5 | 697 | usbhsf_fifo_clear(pipe, fifo); |
4bd04811 | 698 | goto usbhs_fifo_read_end; |
e8d548d5 KM |
699 | } |
700 | ||
e8d548d5 KM |
701 | /* |
702 | * FIXME | |
703 | * | |
704 | * 32-bit access only | |
705 | */ | |
659d4954 | 706 | if (len >= 4 && !((unsigned long)buf & 0x03)) { |
e8d548d5 KM |
707 | ioread32_rep(addr, buf, len / 4); |
708 | len %= 4; | |
659d4954 | 709 | buf += total_len - len; |
e8d548d5 KM |
710 | } |
711 | ||
712 | /* the rest operation */ | |
713 | for (i = 0; i < len; i++) { | |
714 | if (!(i & 0x03)) | |
715 | data = ioread32(addr); | |
716 | ||
717 | buf[i] = (data >> ((i & 0x03) * 8)) & 0xff; | |
718 | } | |
719 | ||
4bd04811 | 720 | usbhs_fifo_read_end: |
97664a20 KM |
721 | dev_dbg(dev, " recv %d (%d/ %d/ %d/ %d)\n", |
722 | usbhs_pipe_number(pipe), | |
723 | pkt->length, pkt->actual, *is_done, pkt->zero); | |
724 | ||
d77e3f4e KM |
725 | usbhs_fifo_read_busy: |
726 | usbhsf_fifo_unselect(pipe, fifo); | |
727 | ||
728 | return ret; | |
e8d548d5 | 729 | } |
dad67397 | 730 | |
fcb42e23 | 731 | const struct usbhs_pkt_handle usbhs_fifo_pio_pop_handler = { |
dad67397 | 732 | .prepare = usbhsf_prepare_pop, |
0cb7e61d | 733 | .try_run = usbhsf_pio_try_pop, |
dad67397 KM |
734 | }; |
735 | ||
736 | /* | |
233f519d | 737 | * DCP ctrol statge handler |
dad67397 | 738 | */ |
97664a20 | 739 | static int usbhsf_ctrl_stage_end(struct usbhs_pkt *pkt, int *is_done) |
dad67397 | 740 | { |
97664a20 | 741 | usbhs_dcp_control_transfer_done(pkt->pipe); |
dad67397 | 742 | |
97664a20 | 743 | *is_done = 1; |
dad67397 KM |
744 | |
745 | return 0; | |
746 | } | |
747 | ||
fcb42e23 | 748 | const struct usbhs_pkt_handle usbhs_ctrl_stage_end_handler = { |
dad67397 KM |
749 | .prepare = usbhsf_ctrl_stage_end, |
750 | .try_run = usbhsf_ctrl_stage_end, | |
751 | }; | |
752 | ||
e73a9891 KM |
753 | /* |
754 | * DMA fifo functions | |
755 | */ | |
756 | static struct dma_chan *usbhsf_dma_chan_get(struct usbhs_fifo *fifo, | |
757 | struct usbhs_pkt *pkt) | |
758 | { | |
759 | if (&usbhs_fifo_dma_push_handler == pkt->handler) | |
760 | return fifo->tx_chan; | |
761 | ||
762 | if (&usbhs_fifo_dma_pop_handler == pkt->handler) | |
763 | return fifo->rx_chan; | |
764 | ||
765 | return NULL; | |
766 | } | |
767 | ||
768 | static struct usbhs_fifo *usbhsf_get_dma_fifo(struct usbhs_priv *priv, | |
769 | struct usbhs_pkt *pkt) | |
770 | { | |
771 | struct usbhs_fifo *fifo; | |
3a2634a5 | 772 | int i; |
e73a9891 | 773 | |
3a2634a5 YS |
774 | usbhs_for_each_dfifo(priv, fifo, i) { |
775 | if (usbhsf_dma_chan_get(fifo, pkt) && | |
776 | !usbhsf_fifo_is_busy(fifo)) | |
777 | return fifo; | |
778 | } | |
e73a9891 KM |
779 | |
780 | return NULL; | |
781 | } | |
782 | ||
783 | #define usbhsf_dma_start(p, f) __usbhsf_dma_ctrl(p, f, DREQE) | |
784 | #define usbhsf_dma_stop(p, f) __usbhsf_dma_ctrl(p, f, 0) | |
785 | static void __usbhsf_dma_ctrl(struct usbhs_pipe *pipe, | |
786 | struct usbhs_fifo *fifo, | |
787 | u16 dreqe) | |
788 | { | |
789 | struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe); | |
790 | ||
791 | usbhs_bset(priv, fifo->sel, DREQE, dreqe); | |
792 | } | |
793 | ||
e73a9891 KM |
794 | static int __usbhsf_dma_map_ctrl(struct usbhs_pkt *pkt, int map) |
795 | { | |
796 | struct usbhs_pipe *pipe = pkt->pipe; | |
797 | struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe); | |
798 | struct usbhs_pipe_info *info = usbhs_priv_to_pipeinfo(priv); | |
c3cdcac7 YS |
799 | struct usbhs_fifo *fifo = usbhs_pipe_to_fifo(pipe); |
800 | struct dma_chan *chan = usbhsf_dma_chan_get(fifo, pkt); | |
e73a9891 | 801 | |
c3cdcac7 | 802 | return info->dma_map_ctrl(chan->device->dev, pkt, map); |
e73a9891 KM |
803 | } |
804 | ||
805 | static void usbhsf_dma_complete(void *arg); | |
6e4b74e4 | 806 | static void xfer_work(struct work_struct *work) |
e73a9891 | 807 | { |
6e4b74e4 | 808 | struct usbhs_pkt *pkt = container_of(work, struct usbhs_pkt, work); |
e73a9891 | 809 | struct usbhs_pipe *pipe = pkt->pipe; |
4fdef698 | 810 | struct usbhs_fifo *fifo; |
e73a9891 | 811 | struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe); |
e73a9891 | 812 | struct dma_async_tx_descriptor *desc; |
4fdef698 | 813 | struct dma_chan *chan; |
e73a9891 | 814 | struct device *dev = usbhs_priv_to_dev(priv); |
55ba4e5e | 815 | enum dma_transfer_direction dir; |
4fdef698 YS |
816 | unsigned long flags; |
817 | ||
818 | usbhs_lock(priv, flags); | |
819 | fifo = usbhs_pipe_to_fifo(pipe); | |
820 | if (!fifo) | |
821 | goto xfer_work_end; | |
e73a9891 | 822 | |
4fdef698 | 823 | chan = usbhsf_dma_chan_get(fifo, pkt); |
55ba4e5e | 824 | dir = usbhs_pipe_is_dir_in(pipe) ? DMA_DEV_TO_MEM : DMA_MEM_TO_DEV; |
e73a9891 | 825 | |
2f0de9d8 KM |
826 | desc = dmaengine_prep_slave_single(chan, pkt->dma + pkt->actual, |
827 | pkt->trans, dir, | |
16052827 | 828 | DMA_PREP_INTERRUPT | DMA_CTRL_ACK); |
e73a9891 | 829 | if (!desc) |
4fdef698 | 830 | goto xfer_work_end; |
e73a9891 KM |
831 | |
832 | desc->callback = usbhsf_dma_complete; | |
833 | desc->callback_param = pipe; | |
834 | ||
ab330cf3 YS |
835 | pkt->cookie = dmaengine_submit(desc); |
836 | if (pkt->cookie < 0) { | |
e73a9891 | 837 | dev_err(dev, "Failed to submit dma descriptor\n"); |
4fdef698 | 838 | goto xfer_work_end; |
e73a9891 KM |
839 | } |
840 | ||
841 | dev_dbg(dev, " %s %d (%d/ %d)\n", | |
842 | fifo->name, usbhs_pipe_number(pipe), pkt->length, pkt->zero); | |
843 | ||
8355b2b3 | 844 | usbhs_pipe_running(pipe, 1); |
e73a9891 | 845 | usbhsf_dma_start(pipe, fifo); |
9b53d9af | 846 | usbhs_pipe_set_trans_count_if_bulk(pipe, pkt->trans); |
e73a9891 | 847 | dma_async_issue_pending(chan); |
9b53d9af | 848 | usbhs_pipe_enable(pipe); |
4fdef698 YS |
849 | |
850 | xfer_work_end: | |
851 | usbhs_unlock(priv, flags); | |
e73a9891 KM |
852 | } |
853 | ||
233f519d KM |
854 | /* |
855 | * DMA push handler | |
856 | */ | |
e73a9891 KM |
857 | static int usbhsf_dma_prepare_push(struct usbhs_pkt *pkt, int *is_done) |
858 | { | |
859 | struct usbhs_pipe *pipe = pkt->pipe; | |
860 | struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe); | |
861 | struct usbhs_fifo *fifo; | |
862 | int len = pkt->length - pkt->actual; | |
863 | int ret; | |
ab330cf3 | 864 | uintptr_t align_mask; |
e73a9891 KM |
865 | |
866 | if (usbhs_pipe_is_busy(pipe)) | |
867 | return 0; | |
868 | ||
869 | /* use PIO if packet is less than pio_dma_border or pipe is DCP */ | |
870 | if ((len < usbhs_get_dparam(priv, pio_dma_border)) || | |
700aa7ff | 871 | usbhs_pipe_type_is(pipe, USB_ENDPOINT_XFER_ISOC)) |
e73a9891 KM |
872 | goto usbhsf_pio_prepare_push; |
873 | ||
ab330cf3 YS |
874 | /* check data length if this driver don't use USB-DMAC */ |
875 | if (!usbhs_get_dparam(priv, has_usb_dmac) && len & 0x7) | |
e73a9891 KM |
876 | goto usbhsf_pio_prepare_push; |
877 | ||
ab330cf3 YS |
878 | /* check buffer alignment */ |
879 | align_mask = usbhs_get_dparam(priv, has_usb_dmac) ? | |
880 | USBHS_USB_DMAC_XFER_SIZE - 1 : 0x7; | |
881 | if ((uintptr_t)(pkt->buf + pkt->actual) & align_mask) | |
9a12d097 KM |
882 | goto usbhsf_pio_prepare_push; |
883 | ||
8355b2b3 YS |
884 | /* return at this time if the pipe is running */ |
885 | if (usbhs_pipe_is_running(pipe)) | |
886 | return 0; | |
887 | ||
e73a9891 KM |
888 | /* get enable DMA fifo */ |
889 | fifo = usbhsf_get_dma_fifo(priv, pkt); | |
890 | if (!fifo) | |
891 | goto usbhsf_pio_prepare_push; | |
892 | ||
e73a9891 KM |
893 | ret = usbhsf_fifo_select(pipe, fifo, 0); |
894 | if (ret < 0) | |
e789ece1 YS |
895 | goto usbhsf_pio_prepare_push; |
896 | ||
897 | if (usbhsf_dma_map(pkt) < 0) | |
898 | goto usbhsf_pio_prepare_push_unselect; | |
e73a9891 KM |
899 | |
900 | pkt->trans = len; | |
901 | ||
6490865c | 902 | usbhsf_tx_irq_ctrl(pipe, 0); |
6e4b74e4 GL |
903 | INIT_WORK(&pkt->work, xfer_work); |
904 | schedule_work(&pkt->work); | |
e73a9891 KM |
905 | |
906 | return 0; | |
907 | ||
e789ece1 YS |
908 | usbhsf_pio_prepare_push_unselect: |
909 | usbhsf_fifo_unselect(pipe, fifo); | |
e73a9891 KM |
910 | usbhsf_pio_prepare_push: |
911 | /* | |
912 | * change handler to PIO | |
913 | */ | |
914 | pkt->handler = &usbhs_fifo_pio_push_handler; | |
915 | ||
916 | return pkt->handler->prepare(pkt, is_done); | |
917 | } | |
918 | ||
919 | static int usbhsf_dma_push_done(struct usbhs_pkt *pkt, int *is_done) | |
920 | { | |
921 | struct usbhs_pipe *pipe = pkt->pipe; | |
c0ed8b23 | 922 | int is_short = pkt->trans % usbhs_pipe_get_maxpacket(pipe); |
e73a9891 | 923 | |
c0ed8b23 YS |
924 | pkt->actual += pkt->trans; |
925 | ||
926 | if (pkt->actual < pkt->length) | |
927 | *is_done = 0; /* there are remainder data */ | |
928 | else if (is_short) | |
929 | *is_done = 1; /* short packet */ | |
930 | else | |
931 | *is_done = !pkt->zero; /* send zero packet? */ | |
e73a9891 | 932 | |
8355b2b3 | 933 | usbhs_pipe_running(pipe, !*is_done); |
e73a9891 KM |
934 | |
935 | usbhsf_dma_stop(pipe, pipe->fifo); | |
936 | usbhsf_dma_unmap(pkt); | |
937 | usbhsf_fifo_unselect(pipe, pipe->fifo); | |
938 | ||
c0ed8b23 YS |
939 | if (!*is_done) { |
940 | /* change handler to PIO */ | |
941 | pkt->handler = &usbhs_fifo_pio_push_handler; | |
942 | return pkt->handler->try_run(pkt, is_done); | |
943 | } | |
944 | ||
e73a9891 KM |
945 | return 0; |
946 | } | |
947 | ||
fcb42e23 | 948 | const struct usbhs_pkt_handle usbhs_fifo_dma_push_handler = { |
e73a9891 KM |
949 | .prepare = usbhsf_dma_prepare_push, |
950 | .dma_done = usbhsf_dma_push_done, | |
951 | }; | |
952 | ||
233f519d KM |
953 | /* |
954 | * DMA pop handler | |
955 | */ | |
ab330cf3 YS |
956 | |
957 | static int usbhsf_dma_prepare_pop_with_rx_irq(struct usbhs_pkt *pkt, | |
958 | int *is_done) | |
959 | { | |
960 | return usbhsf_prepare_pop(pkt, is_done); | |
961 | } | |
962 | ||
963 | static int usbhsf_dma_prepare_pop_with_usb_dmac(struct usbhs_pkt *pkt, | |
964 | int *is_done) | |
965 | { | |
966 | struct usbhs_pipe *pipe = pkt->pipe; | |
967 | struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe); | |
968 | struct usbhs_fifo *fifo; | |
969 | int ret; | |
970 | ||
971 | if (usbhs_pipe_is_busy(pipe)) | |
972 | return 0; | |
973 | ||
974 | /* use PIO if packet is less than pio_dma_border or pipe is DCP */ | |
975 | if ((pkt->length < usbhs_get_dparam(priv, pio_dma_border)) || | |
700aa7ff | 976 | usbhs_pipe_type_is(pipe, USB_ENDPOINT_XFER_ISOC)) |
ab330cf3 YS |
977 | goto usbhsf_pio_prepare_pop; |
978 | ||
979 | fifo = usbhsf_get_dma_fifo(priv, pkt); | |
980 | if (!fifo) | |
981 | goto usbhsf_pio_prepare_pop; | |
982 | ||
983 | if ((uintptr_t)pkt->buf & (USBHS_USB_DMAC_XFER_SIZE - 1)) | |
984 | goto usbhsf_pio_prepare_pop; | |
985 | ||
986 | usbhs_pipe_config_change_bfre(pipe, 1); | |
987 | ||
988 | ret = usbhsf_fifo_select(pipe, fifo, 0); | |
989 | if (ret < 0) | |
990 | goto usbhsf_pio_prepare_pop; | |
991 | ||
992 | if (usbhsf_dma_map(pkt) < 0) | |
993 | goto usbhsf_pio_prepare_pop_unselect; | |
994 | ||
995 | /* DMA */ | |
996 | ||
997 | /* | |
998 | * usbhs_fifo_dma_pop_handler :: prepare | |
999 | * enabled irq to come here. | |
1000 | * but it is no longer needed for DMA. disable it. | |
1001 | */ | |
1002 | usbhsf_rx_irq_ctrl(pipe, 0); | |
1003 | ||
1004 | pkt->trans = pkt->length; | |
1005 | ||
1006 | INIT_WORK(&pkt->work, xfer_work); | |
1007 | schedule_work(&pkt->work); | |
1008 | ||
1009 | return 0; | |
1010 | ||
1011 | usbhsf_pio_prepare_pop_unselect: | |
1012 | usbhsf_fifo_unselect(pipe, fifo); | |
1013 | usbhsf_pio_prepare_pop: | |
1014 | ||
1015 | /* | |
1016 | * change handler to PIO | |
1017 | */ | |
1018 | pkt->handler = &usbhs_fifo_pio_pop_handler; | |
1019 | usbhs_pipe_config_change_bfre(pipe, 0); | |
1020 | ||
1021 | return pkt->handler->prepare(pkt, is_done); | |
1022 | } | |
1023 | ||
1024 | static int usbhsf_dma_prepare_pop(struct usbhs_pkt *pkt, int *is_done) | |
1025 | { | |
1026 | struct usbhs_priv *priv = usbhs_pipe_to_priv(pkt->pipe); | |
1027 | ||
1028 | if (usbhs_get_dparam(priv, has_usb_dmac)) | |
1029 | return usbhsf_dma_prepare_pop_with_usb_dmac(pkt, is_done); | |
1030 | else | |
1031 | return usbhsf_dma_prepare_pop_with_rx_irq(pkt, is_done); | |
1032 | } | |
1033 | ||
1034 | static int usbhsf_dma_try_pop_with_rx_irq(struct usbhs_pkt *pkt, int *is_done) | |
e73a9891 KM |
1035 | { |
1036 | struct usbhs_pipe *pipe = pkt->pipe; | |
1037 | struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe); | |
1038 | struct usbhs_fifo *fifo; | |
1039 | int len, ret; | |
1040 | ||
1041 | if (usbhs_pipe_is_busy(pipe)) | |
1042 | return 0; | |
1043 | ||
1044 | if (usbhs_pipe_is_dcp(pipe)) | |
1045 | goto usbhsf_pio_prepare_pop; | |
1046 | ||
1047 | /* get enable DMA fifo */ | |
1048 | fifo = usbhsf_get_dma_fifo(priv, pkt); | |
1049 | if (!fifo) | |
1050 | goto usbhsf_pio_prepare_pop; | |
1051 | ||
c9ae0c91 | 1052 | if ((uintptr_t)(pkt->buf + pkt->actual) & 0x7) /* 8byte alignment */ |
9a12d097 KM |
1053 | goto usbhsf_pio_prepare_pop; |
1054 | ||
e73a9891 KM |
1055 | ret = usbhsf_fifo_select(pipe, fifo, 0); |
1056 | if (ret < 0) | |
1057 | goto usbhsf_pio_prepare_pop; | |
1058 | ||
1059 | /* use PIO if packet is less than pio_dma_border */ | |
1060 | len = usbhsf_fifo_rcv_len(priv, fifo); | |
1061 | len = min(pkt->length - pkt->actual, len); | |
77975eec | 1062 | if (len & 0x7) /* 8byte alignment */ |
e73a9891 KM |
1063 | goto usbhsf_pio_prepare_pop_unselect; |
1064 | ||
1065 | if (len < usbhs_get_dparam(priv, pio_dma_border)) | |
1066 | goto usbhsf_pio_prepare_pop_unselect; | |
1067 | ||
1068 | ret = usbhsf_fifo_barrier(priv, fifo); | |
1069 | if (ret < 0) | |
1070 | goto usbhsf_pio_prepare_pop_unselect; | |
1071 | ||
1072 | if (usbhsf_dma_map(pkt) < 0) | |
1073 | goto usbhsf_pio_prepare_pop_unselect; | |
1074 | ||
1075 | /* DMA */ | |
1076 | ||
1077 | /* | |
1078 | * usbhs_fifo_dma_pop_handler :: prepare | |
1079 | * enabled irq to come here. | |
1080 | * but it is no longer needed for DMA. disable it. | |
1081 | */ | |
1082 | usbhsf_rx_irq_ctrl(pipe, 0); | |
1083 | ||
1084 | pkt->trans = len; | |
1085 | ||
6e4b74e4 GL |
1086 | INIT_WORK(&pkt->work, xfer_work); |
1087 | schedule_work(&pkt->work); | |
e73a9891 KM |
1088 | |
1089 | return 0; | |
1090 | ||
1091 | usbhsf_pio_prepare_pop_unselect: | |
1092 | usbhsf_fifo_unselect(pipe, fifo); | |
1093 | usbhsf_pio_prepare_pop: | |
1094 | ||
1095 | /* | |
1096 | * change handler to PIO | |
1097 | */ | |
1098 | pkt->handler = &usbhs_fifo_pio_pop_handler; | |
1099 | ||
1100 | return pkt->handler->try_run(pkt, is_done); | |
1101 | } | |
1102 | ||
ab330cf3 YS |
1103 | static int usbhsf_dma_try_pop(struct usbhs_pkt *pkt, int *is_done) |
1104 | { | |
1105 | struct usbhs_priv *priv = usbhs_pipe_to_priv(pkt->pipe); | |
1106 | ||
1107 | BUG_ON(usbhs_get_dparam(priv, has_usb_dmac)); | |
1108 | ||
1109 | return usbhsf_dma_try_pop_with_rx_irq(pkt, is_done); | |
1110 | } | |
1111 | ||
1112 | static int usbhsf_dma_pop_done_with_rx_irq(struct usbhs_pkt *pkt, int *is_done) | |
e73a9891 KM |
1113 | { |
1114 | struct usbhs_pipe *pipe = pkt->pipe; | |
1115 | int maxp = usbhs_pipe_get_maxpacket(pipe); | |
1116 | ||
1117 | usbhsf_dma_stop(pipe, pipe->fifo); | |
1118 | usbhsf_dma_unmap(pkt); | |
1119 | usbhsf_fifo_unselect(pipe, pipe->fifo); | |
1120 | ||
1121 | pkt->actual += pkt->trans; | |
1122 | ||
1123 | if ((pkt->actual == pkt->length) || /* receive all data */ | |
1124 | (pkt->trans < maxp)) { /* short packet */ | |
1125 | *is_done = 1; | |
8355b2b3 | 1126 | usbhs_pipe_running(pipe, 0); |
e73a9891 KM |
1127 | } else { |
1128 | /* re-enable */ | |
8355b2b3 | 1129 | usbhs_pipe_running(pipe, 0); |
e73a9891 KM |
1130 | usbhsf_prepare_pop(pkt, is_done); |
1131 | } | |
1132 | ||
1133 | return 0; | |
1134 | } | |
1135 | ||
ab330cf3 YS |
1136 | static size_t usbhs_dma_calc_received_size(struct usbhs_pkt *pkt, |
1137 | struct dma_chan *chan, int dtln) | |
1138 | { | |
1139 | struct usbhs_pipe *pipe = pkt->pipe; | |
1140 | struct dma_tx_state state; | |
1141 | size_t received_size; | |
1142 | int maxp = usbhs_pipe_get_maxpacket(pipe); | |
1143 | ||
1144 | dmaengine_tx_status(chan, pkt->cookie, &state); | |
1145 | received_size = pkt->length - state.residue; | |
1146 | ||
1147 | if (dtln) { | |
1148 | received_size -= USBHS_USB_DMAC_XFER_SIZE; | |
1149 | received_size &= ~(maxp - 1); | |
1150 | received_size += dtln; | |
1151 | } | |
1152 | ||
1153 | return received_size; | |
1154 | } | |
1155 | ||
1156 | static int usbhsf_dma_pop_done_with_usb_dmac(struct usbhs_pkt *pkt, | |
1157 | int *is_done) | |
1158 | { | |
1159 | struct usbhs_pipe *pipe = pkt->pipe; | |
1160 | struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe); | |
1161 | struct usbhs_fifo *fifo = usbhs_pipe_to_fifo(pipe); | |
1162 | struct dma_chan *chan = usbhsf_dma_chan_get(fifo, pkt); | |
1163 | int rcv_len; | |
1164 | ||
1165 | /* | |
1166 | * Since the driver disables rx_irq in DMA mode, the interrupt handler | |
1167 | * cannot the BRDYSTS. So, the function clears it here because the | |
1168 | * driver may use PIO mode next time. | |
1169 | */ | |
1170 | usbhs_xxxsts_clear(priv, BRDYSTS, usbhs_pipe_number(pipe)); | |
1171 | ||
1172 | rcv_len = usbhsf_fifo_rcv_len(priv, fifo); | |
1173 | usbhsf_fifo_clear(pipe, fifo); | |
1174 | pkt->actual = usbhs_dma_calc_received_size(pkt, chan, rcv_len); | |
1175 | ||
1176 | usbhsf_dma_stop(pipe, fifo); | |
1177 | usbhsf_dma_unmap(pkt); | |
1178 | usbhsf_fifo_unselect(pipe, pipe->fifo); | |
1179 | ||
1180 | /* The driver can assume the rx transaction is always "done" */ | |
1181 | *is_done = 1; | |
1182 | ||
1183 | return 0; | |
1184 | } | |
1185 | ||
1186 | static int usbhsf_dma_pop_done(struct usbhs_pkt *pkt, int *is_done) | |
1187 | { | |
1188 | struct usbhs_priv *priv = usbhs_pipe_to_priv(pkt->pipe); | |
1189 | ||
1190 | if (usbhs_get_dparam(priv, has_usb_dmac)) | |
1191 | return usbhsf_dma_pop_done_with_usb_dmac(pkt, is_done); | |
1192 | else | |
1193 | return usbhsf_dma_pop_done_with_rx_irq(pkt, is_done); | |
1194 | } | |
1195 | ||
fcb42e23 | 1196 | const struct usbhs_pkt_handle usbhs_fifo_dma_pop_handler = { |
ab330cf3 | 1197 | .prepare = usbhsf_dma_prepare_pop, |
e73a9891 KM |
1198 | .try_run = usbhsf_dma_try_pop, |
1199 | .dma_done = usbhsf_dma_pop_done | |
1200 | }; | |
1201 | ||
1202 | /* | |
1203 | * DMA setting | |
1204 | */ | |
1205 | static bool usbhsf_dma_filter(struct dma_chan *chan, void *param) | |
1206 | { | |
1207 | struct sh_dmae_slave *slave = param; | |
1208 | ||
1209 | /* | |
1210 | * FIXME | |
1211 | * | |
1212 | * usbhs doesn't recognize id = 0 as valid DMA | |
1213 | */ | |
f19b7e0d | 1214 | if (0 == slave->shdma_slave.slave_id) |
e73a9891 KM |
1215 | return false; |
1216 | ||
1217 | chan->private = slave; | |
1218 | ||
1219 | return true; | |
1220 | } | |
1221 | ||
1222 | static void usbhsf_dma_quit(struct usbhs_priv *priv, struct usbhs_fifo *fifo) | |
1223 | { | |
1224 | if (fifo->tx_chan) | |
1225 | dma_release_channel(fifo->tx_chan); | |
1226 | if (fifo->rx_chan) | |
1227 | dma_release_channel(fifo->rx_chan); | |
1228 | ||
1229 | fifo->tx_chan = NULL; | |
1230 | fifo->rx_chan = NULL; | |
1231 | } | |
1232 | ||
6e3f53ab | 1233 | static void usbhsf_dma_init_pdev(struct usbhs_fifo *fifo) |
e73a9891 | 1234 | { |
e73a9891 KM |
1235 | dma_cap_mask_t mask; |
1236 | ||
1237 | dma_cap_zero(mask); | |
1238 | dma_cap_set(DMA_SLAVE, mask); | |
1239 | fifo->tx_chan = dma_request_channel(mask, usbhsf_dma_filter, | |
1240 | &fifo->tx_slave); | |
1241 | ||
1242 | dma_cap_zero(mask); | |
1243 | dma_cap_set(DMA_SLAVE, mask); | |
1244 | fifo->rx_chan = dma_request_channel(mask, usbhsf_dma_filter, | |
1245 | &fifo->rx_slave); | |
6e3f53ab YS |
1246 | } |
1247 | ||
7a96b784 YS |
1248 | static void usbhsf_dma_init_dt(struct device *dev, struct usbhs_fifo *fifo, |
1249 | int channel) | |
abd2dbf6 | 1250 | { |
7a96b784 YS |
1251 | char name[16]; |
1252 | ||
7cc99f1e YS |
1253 | /* |
1254 | * To avoid complex handing for DnFIFOs, the driver uses each | |
1255 | * DnFIFO as TX or RX direction (not bi-direction). | |
1256 | * So, the driver uses odd channels for TX, even channels for RX. | |
1257 | */ | |
1258 | snprintf(name, sizeof(name), "ch%d", channel); | |
1259 | if (channel & 1) { | |
1260 | fifo->tx_chan = dma_request_slave_channel_reason(dev, name); | |
1261 | if (IS_ERR(fifo->tx_chan)) | |
1262 | fifo->tx_chan = NULL; | |
1263 | } else { | |
1264 | fifo->rx_chan = dma_request_slave_channel_reason(dev, name); | |
1265 | if (IS_ERR(fifo->rx_chan)) | |
1266 | fifo->rx_chan = NULL; | |
1267 | } | |
abd2dbf6 YS |
1268 | } |
1269 | ||
7a96b784 YS |
1270 | static void usbhsf_dma_init(struct usbhs_priv *priv, struct usbhs_fifo *fifo, |
1271 | int channel) | |
6e3f53ab YS |
1272 | { |
1273 | struct device *dev = usbhs_priv_to_dev(priv); | |
1274 | ||
abd2dbf6 | 1275 | if (dev->of_node) |
7a96b784 | 1276 | usbhsf_dma_init_dt(dev, fifo, channel); |
abd2dbf6 YS |
1277 | else |
1278 | usbhsf_dma_init_pdev(fifo); | |
e73a9891 KM |
1279 | |
1280 | if (fifo->tx_chan || fifo->rx_chan) | |
4ce68805 | 1281 | dev_dbg(dev, "enable DMAEngine (%s%s%s)\n", |
e73a9891 KM |
1282 | fifo->name, |
1283 | fifo->tx_chan ? "[TX]" : " ", | |
1284 | fifo->rx_chan ? "[RX]" : " "); | |
1285 | } | |
1286 | ||
dad67397 KM |
1287 | /* |
1288 | * irq functions | |
1289 | */ | |
1290 | static int usbhsf_irq_empty(struct usbhs_priv *priv, | |
1291 | struct usbhs_irq_state *irq_state) | |
1292 | { | |
1293 | struct usbhs_pipe *pipe; | |
dad67397 KM |
1294 | struct device *dev = usbhs_priv_to_dev(priv); |
1295 | int i, ret; | |
1296 | ||
1297 | if (!irq_state->bempsts) { | |
1298 | dev_err(dev, "debug %s !!\n", __func__); | |
1299 | return -EIO; | |
1300 | } | |
1301 | ||
1302 | dev_dbg(dev, "irq empty [0x%04x]\n", irq_state->bempsts); | |
1303 | ||
1304 | /* | |
1305 | * search interrupted "pipe" | |
1306 | * not "uep". | |
1307 | */ | |
1308 | usbhs_for_each_pipe_with_dcp(pipe, priv, i) { | |
1309 | if (!(irq_state->bempsts & (1 << i))) | |
1310 | continue; | |
1311 | ||
51b8a021 | 1312 | ret = usbhsf_pkt_handler(pipe, USBHSF_PKT_TRY_RUN); |
dad67397 KM |
1313 | if (ret < 0) |
1314 | dev_err(dev, "irq_empty run_error %d : %d\n", i, ret); | |
1315 | } | |
1316 | ||
1317 | return 0; | |
1318 | } | |
1319 | ||
1320 | static int usbhsf_irq_ready(struct usbhs_priv *priv, | |
1321 | struct usbhs_irq_state *irq_state) | |
1322 | { | |
1323 | struct usbhs_pipe *pipe; | |
dad67397 KM |
1324 | struct device *dev = usbhs_priv_to_dev(priv); |
1325 | int i, ret; | |
1326 | ||
1327 | if (!irq_state->brdysts) { | |
1328 | dev_err(dev, "debug %s !!\n", __func__); | |
1329 | return -EIO; | |
1330 | } | |
1331 | ||
1332 | dev_dbg(dev, "irq ready [0x%04x]\n", irq_state->brdysts); | |
1333 | ||
1334 | /* | |
1335 | * search interrupted "pipe" | |
1336 | * not "uep". | |
1337 | */ | |
1338 | usbhs_for_each_pipe_with_dcp(pipe, priv, i) { | |
1339 | if (!(irq_state->brdysts & (1 << i))) | |
1340 | continue; | |
1341 | ||
51b8a021 | 1342 | ret = usbhsf_pkt_handler(pipe, USBHSF_PKT_TRY_RUN); |
dad67397 KM |
1343 | if (ret < 0) |
1344 | dev_err(dev, "irq_ready run_error %d : %d\n", i, ret); | |
1345 | } | |
1346 | ||
1347 | return 0; | |
1348 | } | |
1349 | ||
e73a9891 KM |
1350 | static void usbhsf_dma_complete(void *arg) |
1351 | { | |
1352 | struct usbhs_pipe *pipe = arg; | |
1353 | struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe); | |
1354 | struct device *dev = usbhs_priv_to_dev(priv); | |
1355 | int ret; | |
1356 | ||
51b8a021 | 1357 | ret = usbhsf_pkt_handler(pipe, USBHSF_PKT_DMA_DONE); |
e73a9891 KM |
1358 | if (ret < 0) |
1359 | dev_err(dev, "dma_complete run_error %d : %d\n", | |
1360 | usbhs_pipe_number(pipe), ret); | |
1361 | } | |
1362 | ||
cdeb7943 YS |
1363 | void usbhs_fifo_clear_dcp(struct usbhs_pipe *pipe) |
1364 | { | |
1365 | struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe); | |
1366 | struct usbhs_fifo *fifo = usbhsf_get_cfifo(priv); /* CFIFO */ | |
1367 | ||
1368 | /* clear DCP FIFO of transmission */ | |
1369 | if (usbhsf_fifo_select(pipe, fifo, 1) < 0) | |
1370 | return; | |
1371 | usbhsf_fifo_clear(pipe, fifo); | |
1372 | usbhsf_fifo_unselect(pipe, fifo); | |
1373 | ||
1374 | /* clear DCP FIFO of reception */ | |
1375 | if (usbhsf_fifo_select(pipe, fifo, 0) < 0) | |
1376 | return; | |
1377 | usbhsf_fifo_clear(pipe, fifo); | |
1378 | usbhsf_fifo_unselect(pipe, fifo); | |
1379 | } | |
1380 | ||
dad67397 KM |
1381 | /* |
1382 | * fifo init | |
1383 | */ | |
1384 | void usbhs_fifo_init(struct usbhs_priv *priv) | |
1385 | { | |
1386 | struct usbhs_mod *mod = usbhs_mod_get_current(priv); | |
d77e3f4e | 1387 | struct usbhs_fifo *cfifo = usbhsf_get_cfifo(priv); |
3a2634a5 YS |
1388 | struct usbhs_fifo *dfifo; |
1389 | int i; | |
dad67397 KM |
1390 | |
1391 | mod->irq_empty = usbhsf_irq_empty; | |
1392 | mod->irq_ready = usbhsf_irq_ready; | |
1393 | mod->irq_bempsts = 0; | |
1394 | mod->irq_brdysts = 0; | |
d77e3f4e KM |
1395 | |
1396 | cfifo->pipe = NULL; | |
3a2634a5 YS |
1397 | usbhs_for_each_dfifo(priv, dfifo, i) |
1398 | dfifo->pipe = NULL; | |
dad67397 KM |
1399 | } |
1400 | ||
1401 | void usbhs_fifo_quit(struct usbhs_priv *priv) | |
1402 | { | |
1403 | struct usbhs_mod *mod = usbhs_mod_get_current(priv); | |
1404 | ||
1405 | mod->irq_empty = NULL; | |
1406 | mod->irq_ready = NULL; | |
1407 | mod->irq_bempsts = 0; | |
1408 | mod->irq_brdysts = 0; | |
1409 | } | |
d3af90a5 | 1410 | |
53e734b1 | 1411 | #define __USBHS_DFIFO_INIT(priv, fifo, channel, fifo_port) \ |
3a2634a5 YS |
1412 | do { \ |
1413 | fifo = usbhsf_get_dnfifo(priv, channel); \ | |
1414 | fifo->name = "D"#channel"FIFO"; \ | |
53e734b1 | 1415 | fifo->port = fifo_port; \ |
3a2634a5 YS |
1416 | fifo->sel = D##channel##FIFOSEL; \ |
1417 | fifo->ctr = D##channel##FIFOCTR; \ | |
1418 | fifo->tx_slave.shdma_slave.slave_id = \ | |
1419 | usbhs_get_dparam(priv, d##channel##_tx_id); \ | |
1420 | fifo->rx_slave.shdma_slave.slave_id = \ | |
1421 | usbhs_get_dparam(priv, d##channel##_rx_id); \ | |
7a96b784 | 1422 | usbhsf_dma_init(priv, fifo, channel); \ |
3a2634a5 YS |
1423 | } while (0) |
1424 | ||
53e734b1 YS |
1425 | #define USBHS_DFIFO_INIT(priv, fifo, channel) \ |
1426 | __USBHS_DFIFO_INIT(priv, fifo, channel, D##channel##FIFO) | |
1427 | #define USBHS_DFIFO_INIT_NO_PORT(priv, fifo, channel) \ | |
1428 | __USBHS_DFIFO_INIT(priv, fifo, channel, 0) | |
1429 | ||
d3af90a5 KM |
1430 | int usbhs_fifo_probe(struct usbhs_priv *priv) |
1431 | { | |
1432 | struct usbhs_fifo *fifo; | |
1433 | ||
1434 | /* CFIFO */ | |
1435 | fifo = usbhsf_get_cfifo(priv); | |
e73a9891 | 1436 | fifo->name = "CFIFO"; |
d3af90a5 KM |
1437 | fifo->port = CFIFO; |
1438 | fifo->sel = CFIFOSEL; | |
1439 | fifo->ctr = CFIFOCTR; | |
1440 | ||
3a2634a5 YS |
1441 | /* DFIFO */ |
1442 | USBHS_DFIFO_INIT(priv, fifo, 0); | |
1443 | USBHS_DFIFO_INIT(priv, fifo, 1); | |
d3cf6a4b YS |
1444 | USBHS_DFIFO_INIT_NO_PORT(priv, fifo, 2); |
1445 | USBHS_DFIFO_INIT_NO_PORT(priv, fifo, 3); | |
e73a9891 | 1446 | |
d3af90a5 KM |
1447 | return 0; |
1448 | } | |
1449 | ||
1450 | void usbhs_fifo_remove(struct usbhs_priv *priv) | |
1451 | { | |
3a2634a5 YS |
1452 | struct usbhs_fifo *fifo; |
1453 | int i; | |
1454 | ||
1455 | usbhs_for_each_dfifo(priv, fifo, i) | |
1456 | usbhsf_dma_quit(priv, fifo); | |
d3af90a5 | 1457 | } |