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