Commit | Line | Data |
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5fd54ace | 1 | // SPDX-License-Identifier: GPL-1.0+ |
e8d548d5 KM |
2 | /* |
3 | * Renesas USB driver | |
4 | * | |
5 | * Copyright (C) 2011 Renesas Solutions Corp. | |
6 | * Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> | |
e8d548d5 KM |
7 | */ |
8 | #include <linux/delay.h> | |
9 | #include <linux/io.h> | |
9c646cfc | 10 | #include <linux/scatterlist.h> |
cc502bb7 PB |
11 | #include "common.h" |
12 | #include "pipe.h" | |
e8d548d5 | 13 | |
d3af90a5 | 14 | #define usbhsf_get_cfifo(p) (&((p)->fifo_info.cfifo)) |
5ea43994 | 15 | #define usbhsf_is_cfifo(p, f) (usbhsf_get_cfifo(p) == f) |
d3af90a5 | 16 | |
d77e3f4e KM |
17 | #define usbhsf_fifo_is_busy(f) ((f)->pipe) /* see usbhs_pipe_select_fifo */ |
18 | ||
4bd04811 | 19 | /* |
233f519d KM |
20 | * packet initialize |
21 | */ | |
22 | void usbhs_pkt_init(struct usbhs_pkt *pkt) | |
23 | { | |
233f519d KM |
24 | INIT_LIST_HEAD(&pkt->node); |
25 | } | |
26 | ||
27 | /* | |
28 | * packet control function | |
4bd04811 | 29 | */ |
97664a20 | 30 | static int usbhsf_null_handle(struct usbhs_pkt *pkt, int *is_done) |
dad67397 KM |
31 | { |
32 | struct usbhs_priv *priv = usbhs_pipe_to_priv(pkt->pipe); | |
33 | struct device *dev = usbhs_priv_to_dev(priv); | |
34 | ||
35 | dev_err(dev, "null handler\n"); | |
36 | ||
37 | return -EINVAL; | |
38 | } | |
39 | ||
fcb42e23 | 40 | static const struct usbhs_pkt_handle usbhsf_null_handler = { |
dad67397 KM |
41 | .prepare = usbhsf_null_handle, |
42 | .try_run = usbhsf_null_handle, | |
43 | }; | |
44 | ||
659d4954 | 45 | void usbhs_pkt_push(struct usbhs_pipe *pipe, struct usbhs_pkt *pkt, |
b331872b KM |
46 | void (*done)(struct usbhs_priv *priv, |
47 | struct usbhs_pkt *pkt), | |
3edeee38 | 48 | void *buf, int len, int zero, int sequence) |
6acb95d4 | 49 | { |
dad67397 KM |
50 | struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe); |
51 | struct device *dev = usbhs_priv_to_dev(priv); | |
97664a20 KM |
52 | unsigned long flags; |
53 | ||
b331872b KM |
54 | if (!done) { |
55 | dev_err(dev, "no done function\n"); | |
56 | return; | |
57 | } | |
58 | ||
a2c76b83 KM |
59 | /******************** spin lock ********************/ |
60 | usbhs_lock(priv, flags); | |
61 | ||
0c6ef985 | 62 | if (!pipe->handler) { |
dad67397 | 63 | dev_err(dev, "no handler function\n"); |
0c6ef985 | 64 | pipe->handler = &usbhsf_null_handler; |
dad67397 KM |
65 | } |
66 | ||
d5261286 | 67 | list_move_tail(&pkt->node, &pipe->list); |
6acb95d4 | 68 | |
0c6ef985 KM |
69 | /* |
70 | * each pkt must hold own handler. | |
71 | * because handler might be changed by its situation. | |
72 | * dma handler -> pio handler. | |
73 | */ | |
659d4954 KM |
74 | pkt->pipe = pipe; |
75 | pkt->buf = buf; | |
0c6ef985 | 76 | pkt->handler = pipe->handler; |
659d4954 KM |
77 | pkt->length = len; |
78 | pkt->zero = zero; | |
79 | pkt->actual = 0; | |
b331872b | 80 | pkt->done = done; |
3edeee38 | 81 | pkt->sequence = sequence; |
97664a20 KM |
82 | |
83 | usbhs_unlock(priv, flags); | |
84 | /******************** spin unlock ******************/ | |
6acb95d4 KM |
85 | } |
86 | ||
97664a20 | 87 | static void __usbhsf_pkt_del(struct usbhs_pkt *pkt) |
6acb95d4 KM |
88 | { |
89 | list_del_init(&pkt->node); | |
90 | } | |
91 | ||
97664a20 | 92 | static struct usbhs_pkt *__usbhsf_pkt_get(struct usbhs_pipe *pipe) |
6acb95d4 | 93 | { |
31faf878 | 94 | return list_first_entry_or_null(&pipe->list, struct usbhs_pkt, node); |
6acb95d4 KM |
95 | } |
96 | ||
2743e7f9 YS |
97 | static void usbhsf_fifo_unselect(struct usbhs_pipe *pipe, |
98 | struct usbhs_fifo *fifo); | |
99 | static struct dma_chan *usbhsf_dma_chan_get(struct usbhs_fifo *fifo, | |
100 | struct usbhs_pkt *pkt); | |
101 | #define usbhsf_dma_map(p) __usbhsf_dma_map_ctrl(p, 1) | |
102 | #define usbhsf_dma_unmap(p) __usbhsf_dma_map_ctrl(p, 0) | |
103 | static int __usbhsf_dma_map_ctrl(struct usbhs_pkt *pkt, int map); | |
97664a20 KM |
104 | struct usbhs_pkt *usbhs_pkt_pop(struct usbhs_pipe *pipe, struct usbhs_pkt *pkt) |
105 | { | |
106 | struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe); | |
2743e7f9 | 107 | struct usbhs_fifo *fifo = usbhs_pipe_to_fifo(pipe); |
97664a20 KM |
108 | unsigned long flags; |
109 | ||
110 | /******************** spin lock ********************/ | |
111 | usbhs_lock(priv, flags); | |
112 | ||
2743e7f9 YS |
113 | usbhs_pipe_disable(pipe); |
114 | ||
97664a20 KM |
115 | if (!pkt) |
116 | pkt = __usbhsf_pkt_get(pipe); | |
117 | ||
2743e7f9 YS |
118 | if (pkt) { |
119 | struct dma_chan *chan = NULL; | |
120 | ||
121 | if (fifo) | |
122 | chan = usbhsf_dma_chan_get(fifo, pkt); | |
123 | if (chan) { | |
124 | dmaengine_terminate_all(chan); | |
2743e7f9 YS |
125 | usbhsf_dma_unmap(pkt); |
126 | } | |
127 | ||
5785e87a YS |
128 | usbhs_pipe_clear_without_sequence(pipe, 0, 0); |
129 | ||
97664a20 | 130 | __usbhsf_pkt_del(pkt); |
2743e7f9 YS |
131 | } |
132 | ||
133 | if (fifo) | |
134 | usbhsf_fifo_unselect(pipe, fifo); | |
97664a20 KM |
135 | |
136 | usbhs_unlock(priv, flags); | |
137 | /******************** spin unlock ******************/ | |
138 | ||
139 | return pkt; | |
140 | } | |
141 | ||
51b8a021 KM |
142 | enum { |
143 | USBHSF_PKT_PREPARE, | |
144 | USBHSF_PKT_TRY_RUN, | |
145 | USBHSF_PKT_DMA_DONE, | |
146 | }; | |
147 | ||
148 | static int usbhsf_pkt_handler(struct usbhs_pipe *pipe, int type) | |
97664a20 KM |
149 | { |
150 | struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe); | |
97664a20 KM |
151 | struct usbhs_pkt *pkt; |
152 | struct device *dev = usbhs_priv_to_dev(priv); | |
153 | int (*func)(struct usbhs_pkt *pkt, int *is_done); | |
154 | unsigned long flags; | |
155 | int ret = 0; | |
156 | int is_done = 0; | |
157 | ||
158 | /******************** spin lock ********************/ | |
159 | usbhs_lock(priv, flags); | |
160 | ||
161 | pkt = __usbhsf_pkt_get(pipe); | |
162 | if (!pkt) | |
163 | goto __usbhs_pkt_handler_end; | |
164 | ||
165 | switch (type) { | |
166 | case USBHSF_PKT_PREPARE: | |
167 | func = pkt->handler->prepare; | |
168 | break; | |
169 | case USBHSF_PKT_TRY_RUN: | |
170 | func = pkt->handler->try_run; | |
171 | break; | |
e73a9891 KM |
172 | case USBHSF_PKT_DMA_DONE: |
173 | func = pkt->handler->dma_done; | |
174 | break; | |
97664a20 | 175 | default: |
984e833c | 176 | dev_err(dev, "unknown pkt handler\n"); |
97664a20 KM |
177 | goto __usbhs_pkt_handler_end; |
178 | } | |
179 | ||
894f2fc4 YS |
180 | if (likely(func)) |
181 | ret = func(pkt, &is_done); | |
97664a20 KM |
182 | |
183 | if (is_done) | |
184 | __usbhsf_pkt_del(pkt); | |
185 | ||
186 | __usbhs_pkt_handler_end: | |
187 | usbhs_unlock(priv, flags); | |
188 | /******************** spin unlock ******************/ | |
189 | ||
0432eed0 | 190 | if (is_done) { |
b331872b | 191 | pkt->done(priv, pkt); |
0432eed0 KM |
192 | usbhs_pkt_start(pipe); |
193 | } | |
97664a20 KM |
194 | |
195 | return ret; | |
196 | } | |
197 | ||
51b8a021 KM |
198 | void usbhs_pkt_start(struct usbhs_pipe *pipe) |
199 | { | |
200 | usbhsf_pkt_handler(pipe, USBHSF_PKT_PREPARE); | |
201 | } | |
202 | ||
659d4954 KM |
203 | /* |
204 | * irq enable/disable function | |
205 | */ | |
3192fcb2 KM |
206 | #define usbhsf_irq_empty_ctrl(p, e) usbhsf_irq_callback_ctrl(p, irq_bempsts, e) |
207 | #define usbhsf_irq_ready_ctrl(p, e) usbhsf_irq_callback_ctrl(p, irq_brdysts, e) | |
659d4954 KM |
208 | #define usbhsf_irq_callback_ctrl(pipe, status, enable) \ |
209 | ({ \ | |
210 | struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe); \ | |
211 | struct usbhs_mod *mod = usbhs_mod_get_current(priv); \ | |
212 | u16 status = (1 << usbhs_pipe_number(pipe)); \ | |
213 | if (!mod) \ | |
214 | return; \ | |
215 | if (enable) \ | |
3192fcb2 | 216 | mod->status |= status; \ |
659d4954 | 217 | else \ |
3192fcb2 | 218 | mod->status &= ~status; \ |
659d4954 KM |
219 | usbhs_irq_callback_update(priv, mod); \ |
220 | }) | |
221 | ||
222 | static void usbhsf_tx_irq_ctrl(struct usbhs_pipe *pipe, int enable) | |
223 | { | |
224 | /* | |
225 | * And DCP pipe can NOT use "ready interrupt" for "send" | |
226 | * it should use "empty" interrupt. | |
227 | * see | |
228 | * "Operation" - "Interrupt Function" - "BRDY Interrupt" | |
229 | * | |
230 | * on the other hand, normal pipe can use "ready interrupt" for "send" | |
231 | * even though it is single/double buffer | |
232 | */ | |
233 | if (usbhs_pipe_is_dcp(pipe)) | |
234 | usbhsf_irq_empty_ctrl(pipe, enable); | |
235 | else | |
236 | usbhsf_irq_ready_ctrl(pipe, enable); | |
237 | } | |
238 | ||
239 | static void usbhsf_rx_irq_ctrl(struct usbhs_pipe *pipe, int enable) | |
240 | { | |
241 | usbhsf_irq_ready_ctrl(pipe, enable); | |
242 | } | |
243 | ||
e8d548d5 KM |
244 | /* |
245 | * FIFO ctrl | |
246 | */ | |
d3af90a5 KM |
247 | static void usbhsf_send_terminator(struct usbhs_pipe *pipe, |
248 | struct usbhs_fifo *fifo) | |
e8d548d5 KM |
249 | { |
250 | struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe); | |
251 | ||
d3af90a5 | 252 | usbhs_bset(priv, fifo->ctr, BVAL, BVAL); |
e8d548d5 KM |
253 | } |
254 | ||
d3af90a5 KM |
255 | static int usbhsf_fifo_barrier(struct usbhs_priv *priv, |
256 | struct usbhs_fifo *fifo) | |
e8d548d5 | 257 | { |
469e2978 YS |
258 | /* The FIFO port is accessible */ |
259 | if (usbhs_read(priv, fifo->ctr) & FRDY) | |
260 | return 0; | |
e8d548d5 KM |
261 | |
262 | return -EBUSY; | |
263 | } | |
264 | ||
d3af90a5 KM |
265 | static void usbhsf_fifo_clear(struct usbhs_pipe *pipe, |
266 | struct usbhs_fifo *fifo) | |
e8d548d5 KM |
267 | { |
268 | struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe); | |
6124607a | 269 | int ret = 0; |
e8d548d5 | 270 | |
0a2ce62b YS |
271 | if (!usbhs_pipe_is_dcp(pipe)) { |
272 | /* | |
273 | * This driver checks the pipe condition first to avoid -EBUSY | |
469e2978 YS |
274 | * from usbhsf_fifo_barrier() if the pipe is RX direction and |
275 | * empty. | |
0a2ce62b YS |
276 | */ |
277 | if (usbhs_pipe_is_dir_in(pipe)) | |
278 | ret = usbhs_pipe_is_accessible(pipe); | |
279 | if (!ret) | |
280 | ret = usbhsf_fifo_barrier(priv, fifo); | |
281 | } | |
e8d548d5 | 282 | |
6124607a YS |
283 | /* |
284 | * if non-DCP pipe, this driver should set BCLR when | |
285 | * usbhsf_fifo_barrier() returns 0. | |
286 | */ | |
287 | if (!ret) | |
288 | usbhs_write(priv, fifo->ctr, BCLR); | |
e8d548d5 KM |
289 | } |
290 | ||
d3af90a5 KM |
291 | static int usbhsf_fifo_rcv_len(struct usbhs_priv *priv, |
292 | struct usbhs_fifo *fifo) | |
e8d548d5 | 293 | { |
d3af90a5 | 294 | return usbhs_read(priv, fifo->ctr) & DTLN_MASK; |
e8d548d5 KM |
295 | } |
296 | ||
d77e3f4e KM |
297 | static void usbhsf_fifo_unselect(struct usbhs_pipe *pipe, |
298 | struct usbhs_fifo *fifo) | |
299 | { | |
300 | struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe); | |
301 | ||
302 | usbhs_pipe_select_fifo(pipe, NULL); | |
303 | usbhs_write(priv, fifo->sel, 0); | |
304 | } | |
305 | ||
d3af90a5 KM |
306 | static int usbhsf_fifo_select(struct usbhs_pipe *pipe, |
307 | struct usbhs_fifo *fifo, | |
308 | int write) | |
e8d548d5 KM |
309 | { |
310 | struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe); | |
311 | struct device *dev = usbhs_priv_to_dev(priv); | |
312 | int timeout = 1024; | |
313 | u16 mask = ((1 << 5) | 0xF); /* mask of ISEL | CURPIPE */ | |
314 | u16 base = usbhs_pipe_number(pipe); /* CURPIPE */ | |
315 | ||
d77e3f4e KM |
316 | if (usbhs_pipe_is_busy(pipe) || |
317 | usbhsf_fifo_is_busy(fifo)) | |
318 | return -EBUSY; | |
319 | ||
92352071 | 320 | if (usbhs_pipe_is_dcp(pipe)) { |
e8d548d5 KM |
321 | base |= (1 == write) << 5; /* ISEL */ |
322 | ||
92352071 KM |
323 | if (usbhs_mod_is_host(priv)) |
324 | usbhs_dcp_dir_for_host(pipe, write); | |
325 | } | |
326 | ||
e8d548d5 | 327 | /* "base" will be used below */ |
5ea43994 SY |
328 | if (usbhs_get_dparam(priv, has_sudmac) && !usbhsf_is_cfifo(priv, fifo)) |
329 | usbhs_write(priv, fifo->sel, base); | |
330 | else | |
331 | usbhs_write(priv, fifo->sel, base | MBW_32); | |
e8d548d5 KM |
332 | |
333 | /* check ISEL and CURPIPE value */ | |
334 | while (timeout--) { | |
d77e3f4e KM |
335 | if (base == (mask & usbhs_read(priv, fifo->sel))) { |
336 | usbhs_pipe_select_fifo(pipe, fifo); | |
e8d548d5 | 337 | return 0; |
d77e3f4e | 338 | } |
e8d548d5 KM |
339 | udelay(10); |
340 | } | |
341 | ||
342 | dev_err(dev, "fifo select error\n"); | |
343 | ||
344 | return -EIO; | |
345 | } | |
346 | ||
9e74d601 KM |
347 | /* |
348 | * DCP status stage | |
349 | */ | |
350 | static int usbhs_dcp_dir_switch_to_write(struct usbhs_pkt *pkt, int *is_done) | |
351 | { | |
352 | struct usbhs_pipe *pipe = pkt->pipe; | |
353 | struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe); | |
354 | struct usbhs_fifo *fifo = usbhsf_get_cfifo(priv); /* CFIFO */ | |
355 | struct device *dev = usbhs_priv_to_dev(priv); | |
356 | int ret; | |
357 | ||
358 | usbhs_pipe_disable(pipe); | |
359 | ||
360 | ret = usbhsf_fifo_select(pipe, fifo, 1); | |
361 | if (ret < 0) { | |
362 | dev_err(dev, "%s() faile\n", __func__); | |
363 | return ret; | |
364 | } | |
365 | ||
366 | usbhs_pipe_sequence_data1(pipe); /* DATA1 */ | |
367 | ||
368 | usbhsf_fifo_clear(pipe, fifo); | |
369 | usbhsf_send_terminator(pipe, fifo); | |
370 | ||
371 | usbhsf_fifo_unselect(pipe, fifo); | |
372 | ||
373 | usbhsf_tx_irq_ctrl(pipe, 1); | |
374 | usbhs_pipe_enable(pipe); | |
375 | ||
376 | return ret; | |
377 | } | |
378 | ||
379 | static int usbhs_dcp_dir_switch_to_read(struct usbhs_pkt *pkt, int *is_done) | |
380 | { | |
381 | struct usbhs_pipe *pipe = pkt->pipe; | |
382 | struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe); | |
383 | struct usbhs_fifo *fifo = usbhsf_get_cfifo(priv); /* CFIFO */ | |
384 | struct device *dev = usbhs_priv_to_dev(priv); | |
385 | int ret; | |
386 | ||
387 | usbhs_pipe_disable(pipe); | |
388 | ||
389 | ret = usbhsf_fifo_select(pipe, fifo, 0); | |
390 | if (ret < 0) { | |
391 | dev_err(dev, "%s() fail\n", __func__); | |
392 | return ret; | |
393 | } | |
394 | ||
395 | usbhs_pipe_sequence_data1(pipe); /* DATA1 */ | |
396 | usbhsf_fifo_clear(pipe, fifo); | |
397 | ||
398 | usbhsf_fifo_unselect(pipe, fifo); | |
399 | ||
400 | usbhsf_rx_irq_ctrl(pipe, 1); | |
401 | usbhs_pipe_enable(pipe); | |
402 | ||
403 | return ret; | |
404 | ||
405 | } | |
406 | ||
407 | static int usbhs_dcp_dir_switch_done(struct usbhs_pkt *pkt, int *is_done) | |
408 | { | |
409 | struct usbhs_pipe *pipe = pkt->pipe; | |
410 | ||
411 | if (pkt->handler == &usbhs_dcp_status_stage_in_handler) | |
412 | usbhsf_tx_irq_ctrl(pipe, 0); | |
413 | else | |
414 | usbhsf_rx_irq_ctrl(pipe, 0); | |
415 | ||
416 | pkt->actual = pkt->length; | |
417 | *is_done = 1; | |
418 | ||
419 | return 0; | |
420 | } | |
421 | ||
fcb42e23 | 422 | const struct usbhs_pkt_handle usbhs_dcp_status_stage_in_handler = { |
9e74d601 KM |
423 | .prepare = usbhs_dcp_dir_switch_to_write, |
424 | .try_run = usbhs_dcp_dir_switch_done, | |
425 | }; | |
426 | ||
fcb42e23 | 427 | const struct usbhs_pkt_handle usbhs_dcp_status_stage_out_handler = { |
9e74d601 KM |
428 | .prepare = usbhs_dcp_dir_switch_to_read, |
429 | .try_run = usbhs_dcp_dir_switch_done, | |
430 | }; | |
431 | ||
432 | /* | |
433 | * DCP data stage (push) | |
434 | */ | |
435 | static int usbhsf_dcp_data_stage_try_push(struct usbhs_pkt *pkt, int *is_done) | |
436 | { | |
437 | struct usbhs_pipe *pipe = pkt->pipe; | |
438 | ||
439 | usbhs_pipe_sequence_data1(pipe); /* DATA1 */ | |
440 | ||
441 | /* | |
442 | * change handler to PIO push | |
443 | */ | |
444 | pkt->handler = &usbhs_fifo_pio_push_handler; | |
445 | ||
446 | return pkt->handler->prepare(pkt, is_done); | |
447 | } | |
448 | ||
fcb42e23 | 449 | const struct usbhs_pkt_handle usbhs_dcp_data_stage_out_handler = { |
9e74d601 KM |
450 | .prepare = usbhsf_dcp_data_stage_try_push, |
451 | }; | |
452 | ||
453 | /* | |
454 | * DCP data stage (pop) | |
455 | */ | |
456 | static int usbhsf_dcp_data_stage_prepare_pop(struct usbhs_pkt *pkt, | |
457 | int *is_done) | |
458 | { | |
459 | struct usbhs_pipe *pipe = pkt->pipe; | |
460 | struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe); | |
461 | struct usbhs_fifo *fifo = usbhsf_get_cfifo(priv); | |
462 | ||
463 | if (usbhs_pipe_is_busy(pipe)) | |
464 | return 0; | |
465 | ||
466 | /* | |
467 | * prepare pop for DCP should | |
468 | * - change DCP direction, | |
469 | * - clear fifo | |
470 | * - DATA1 | |
471 | */ | |
472 | usbhs_pipe_disable(pipe); | |
473 | ||
474 | usbhs_pipe_sequence_data1(pipe); /* DATA1 */ | |
475 | ||
476 | usbhsf_fifo_select(pipe, fifo, 0); | |
477 | usbhsf_fifo_clear(pipe, fifo); | |
478 | usbhsf_fifo_unselect(pipe, fifo); | |
479 | ||
480 | /* | |
481 | * change handler to PIO pop | |
482 | */ | |
483 | pkt->handler = &usbhs_fifo_pio_pop_handler; | |
484 | ||
485 | return pkt->handler->prepare(pkt, is_done); | |
486 | } | |
487 | ||
fcb42e23 | 488 | const struct usbhs_pkt_handle usbhs_dcp_data_stage_in_handler = { |
9e74d601 KM |
489 | .prepare = usbhsf_dcp_data_stage_prepare_pop, |
490 | }; | |
491 | ||
e8d548d5 | 492 | /* |
233f519d | 493 | * PIO push handler |
e8d548d5 | 494 | */ |
0cb7e61d | 495 | static int usbhsf_pio_try_push(struct usbhs_pkt *pkt, int *is_done) |
e8d548d5 | 496 | { |
4bd04811 | 497 | struct usbhs_pipe *pipe = pkt->pipe; |
e8d548d5 | 498 | struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe); |
659d4954 | 499 | struct device *dev = usbhs_priv_to_dev(priv); |
d3af90a5 KM |
500 | struct usbhs_fifo *fifo = usbhsf_get_cfifo(priv); /* CFIFO */ |
501 | void __iomem *addr = priv->base + fifo->port; | |
659d4954 | 502 | u8 *buf; |
e8d548d5 KM |
503 | int maxp = usbhs_pipe_get_maxpacket(pipe); |
504 | int total_len; | |
4bd04811 | 505 | int i, ret, len; |
97664a20 | 506 | int is_short; |
e8d548d5 | 507 | |
3edeee38 KM |
508 | usbhs_pipe_data_sequence(pipe, pkt->sequence); |
509 | pkt->sequence = -1; /* -1 sequence will be ignored */ | |
510 | ||
1c90ee0b KM |
511 | usbhs_pipe_set_trans_count_if_bulk(pipe, pkt->length); |
512 | ||
d3af90a5 | 513 | ret = usbhsf_fifo_select(pipe, fifo, 1); |
e8d548d5 | 514 | if (ret < 0) |
d77e3f4e | 515 | return 0; |
e8d548d5 | 516 | |
dad67397 | 517 | ret = usbhs_pipe_is_accessible(pipe); |
4ef85e0f KM |
518 | if (ret < 0) { |
519 | /* inaccessible pipe is not an error */ | |
520 | ret = 0; | |
659d4954 | 521 | goto usbhs_fifo_write_busy; |
4ef85e0f | 522 | } |
e8d548d5 | 523 | |
d3af90a5 | 524 | ret = usbhsf_fifo_barrier(priv, fifo); |
e8d548d5 | 525 | if (ret < 0) |
659d4954 | 526 | goto usbhs_fifo_write_busy; |
e8d548d5 | 527 | |
659d4954 KM |
528 | buf = pkt->buf + pkt->actual; |
529 | len = pkt->length - pkt->actual; | |
530 | len = min(len, maxp); | |
531 | total_len = len; | |
532 | is_short = total_len < maxp; | |
e8d548d5 KM |
533 | |
534 | /* | |
535 | * FIXME | |
536 | * | |
537 | * 32-bit access only | |
538 | */ | |
659d4954 | 539 | if (len >= 4 && !((unsigned long)buf & 0x03)) { |
e8d548d5 KM |
540 | iowrite32_rep(addr, buf, len / 4); |
541 | len %= 4; | |
542 | buf += total_len - len; | |
543 | } | |
544 | ||
545 | /* the rest operation */ | |
546 | for (i = 0; i < len; i++) | |
547 | iowrite8(buf[i], addr + (0x03 - (i & 0x03))); | |
548 | ||
659d4954 KM |
549 | /* |
550 | * variable update | |
551 | */ | |
552 | pkt->actual += total_len; | |
553 | ||
554 | if (pkt->actual < pkt->length) | |
97664a20 | 555 | *is_done = 0; /* there are remainder data */ |
659d4954 | 556 | else if (is_short) |
97664a20 | 557 | *is_done = 1; /* short packet */ |
659d4954 | 558 | else |
97664a20 | 559 | *is_done = !pkt->zero; /* send zero packet ? */ |
659d4954 KM |
560 | |
561 | /* | |
562 | * pipe/irq handling | |
563 | */ | |
564 | if (is_short) | |
d3af90a5 | 565 | usbhsf_send_terminator(pipe, fifo); |
e8d548d5 | 566 | |
97664a20 | 567 | usbhsf_tx_irq_ctrl(pipe, !*is_done); |
8355b2b3 | 568 | usbhs_pipe_running(pipe, !*is_done); |
4bd04811 KM |
569 | usbhs_pipe_enable(pipe); |
570 | ||
659d4954 KM |
571 | dev_dbg(dev, " send %d (%d/ %d/ %d/ %d)\n", |
572 | usbhs_pipe_number(pipe), | |
97664a20 | 573 | pkt->length, pkt->actual, *is_done, pkt->zero); |
659d4954 | 574 | |
d77e3f4e KM |
575 | usbhsf_fifo_unselect(pipe, fifo); |
576 | ||
4bd04811 | 577 | return 0; |
659d4954 KM |
578 | |
579 | usbhs_fifo_write_busy: | |
d77e3f4e KM |
580 | usbhsf_fifo_unselect(pipe, fifo); |
581 | ||
659d4954 KM |
582 | /* |
583 | * pipe is busy. | |
584 | * retry in interrupt | |
585 | */ | |
586 | usbhsf_tx_irq_ctrl(pipe, 1); | |
8355b2b3 | 587 | usbhs_pipe_running(pipe, 1); |
659d4954 KM |
588 | |
589 | return ret; | |
e8d548d5 KM |
590 | } |
591 | ||
8355b2b3 YS |
592 | static int usbhsf_pio_prepare_push(struct usbhs_pkt *pkt, int *is_done) |
593 | { | |
594 | if (usbhs_pipe_is_running(pkt->pipe)) | |
595 | return 0; | |
596 | ||
597 | return usbhsf_pio_try_push(pkt, is_done); | |
598 | } | |
599 | ||
fcb42e23 | 600 | const struct usbhs_pkt_handle usbhs_fifo_pio_push_handler = { |
8355b2b3 | 601 | .prepare = usbhsf_pio_prepare_push, |
0cb7e61d | 602 | .try_run = usbhsf_pio_try_push, |
dad67397 KM |
603 | }; |
604 | ||
233f519d KM |
605 | /* |
606 | * PIO pop handler | |
607 | */ | |
97664a20 | 608 | static int usbhsf_prepare_pop(struct usbhs_pkt *pkt, int *is_done) |
e8d548d5 | 609 | { |
dad67397 | 610 | struct usbhs_pipe *pipe = pkt->pipe; |
e73d42f1 KM |
611 | struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe); |
612 | struct usbhs_fifo *fifo = usbhsf_get_cfifo(priv); | |
d77e3f4e KM |
613 | |
614 | if (usbhs_pipe_is_busy(pipe)) | |
615 | return 0; | |
e8d548d5 | 616 | |
8355b2b3 YS |
617 | if (usbhs_pipe_is_running(pipe)) |
618 | return 0; | |
619 | ||
e8d548d5 | 620 | /* |
d77e3f4e | 621 | * pipe enable to prepare packet receive |
e8d548d5 | 622 | */ |
3edeee38 KM |
623 | usbhs_pipe_data_sequence(pipe, pkt->sequence); |
624 | pkt->sequence = -1; /* -1 sequence will be ignored */ | |
e8d548d5 | 625 | |
e73d42f1 KM |
626 | if (usbhs_pipe_is_dcp(pipe)) |
627 | usbhsf_fifo_clear(pipe, fifo); | |
628 | ||
1c90ee0b | 629 | usbhs_pipe_set_trans_count_if_bulk(pipe, pkt->length); |
e8d548d5 | 630 | usbhs_pipe_enable(pipe); |
8355b2b3 | 631 | usbhs_pipe_running(pipe, 1); |
659d4954 | 632 | usbhsf_rx_irq_ctrl(pipe, 1); |
e8d548d5 | 633 | |
d3af90a5 | 634 | return 0; |
e8d548d5 KM |
635 | } |
636 | ||
0cb7e61d | 637 | static int usbhsf_pio_try_pop(struct usbhs_pkt *pkt, int *is_done) |
e8d548d5 | 638 | { |
4bd04811 | 639 | struct usbhs_pipe *pipe = pkt->pipe; |
e8d548d5 | 640 | struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe); |
659d4954 | 641 | struct device *dev = usbhs_priv_to_dev(priv); |
d3af90a5 KM |
642 | struct usbhs_fifo *fifo = usbhsf_get_cfifo(priv); /* CFIFO */ |
643 | void __iomem *addr = priv->base + fifo->port; | |
659d4954 KM |
644 | u8 *buf; |
645 | u32 data = 0; | |
646 | int maxp = usbhs_pipe_get_maxpacket(pipe); | |
4bd04811 | 647 | int rcv_len, len; |
e8d548d5 | 648 | int i, ret; |
4bd04811 | 649 | int total_len = 0; |
e8d548d5 | 650 | |
d3af90a5 | 651 | ret = usbhsf_fifo_select(pipe, fifo, 0); |
e8d548d5 | 652 | if (ret < 0) |
d77e3f4e | 653 | return 0; |
e8d548d5 | 654 | |
d3af90a5 | 655 | ret = usbhsf_fifo_barrier(priv, fifo); |
e8d548d5 | 656 | if (ret < 0) |
d77e3f4e | 657 | goto usbhs_fifo_read_busy; |
e8d548d5 | 658 | |
d3af90a5 | 659 | rcv_len = usbhsf_fifo_rcv_len(priv, fifo); |
e8d548d5 | 660 | |
659d4954 KM |
661 | buf = pkt->buf + pkt->actual; |
662 | len = pkt->length - pkt->actual; | |
663 | len = min(len, rcv_len); | |
664 | total_len = len; | |
665 | ||
6ff5d09b KM |
666 | /* |
667 | * update actual length first here to decide disable pipe. | |
668 | * if this pipe keeps BUF status and all data were popped, | |
669 | * then, next interrupt/token will be issued again | |
670 | */ | |
671 | pkt->actual += total_len; | |
672 | ||
673 | if ((pkt->actual == pkt->length) || /* receive all data */ | |
674 | (total_len < maxp)) { /* short packet */ | |
675 | *is_done = 1; | |
676 | usbhsf_rx_irq_ctrl(pipe, 0); | |
8355b2b3 | 677 | usbhs_pipe_running(pipe, 0); |
93fb9127 YS |
678 | /* |
679 | * If function mode, since this controller is possible to enter | |
680 | * Control Write status stage at this timing, this driver | |
681 | * should not disable the pipe. If such a case happens, this | |
682 | * controller is not able to complete the status stage. | |
683 | */ | |
684 | if (!usbhs_mod_is_host(priv) && !usbhs_pipe_is_dcp(pipe)) | |
685 | usbhs_pipe_disable(pipe); /* disable pipe first */ | |
6ff5d09b KM |
686 | } |
687 | ||
e8d548d5 KM |
688 | /* |
689 | * Buffer clear if Zero-Length packet | |
690 | * | |
691 | * see | |
692 | * "Operation" - "FIFO Buffer Memory" - "FIFO Port Function" | |
693 | */ | |
694 | if (0 == rcv_len) { | |
3edeee38 | 695 | pkt->zero = 1; |
d3af90a5 | 696 | usbhsf_fifo_clear(pipe, fifo); |
4bd04811 | 697 | goto usbhs_fifo_read_end; |
e8d548d5 KM |
698 | } |
699 | ||
e8d548d5 KM |
700 | /* |
701 | * FIXME | |
702 | * | |
703 | * 32-bit access only | |
704 | */ | |
659d4954 | 705 | if (len >= 4 && !((unsigned long)buf & 0x03)) { |
e8d548d5 KM |
706 | ioread32_rep(addr, buf, len / 4); |
707 | len %= 4; | |
659d4954 | 708 | buf += total_len - len; |
e8d548d5 KM |
709 | } |
710 | ||
711 | /* the rest operation */ | |
712 | for (i = 0; i < len; i++) { | |
713 | if (!(i & 0x03)) | |
714 | data = ioread32(addr); | |
715 | ||
716 | buf[i] = (data >> ((i & 0x03) * 8)) & 0xff; | |
717 | } | |
718 | ||
4bd04811 | 719 | usbhs_fifo_read_end: |
97664a20 KM |
720 | dev_dbg(dev, " recv %d (%d/ %d/ %d/ %d)\n", |
721 | usbhs_pipe_number(pipe), | |
722 | pkt->length, pkt->actual, *is_done, pkt->zero); | |
723 | ||
d77e3f4e KM |
724 | usbhs_fifo_read_busy: |
725 | usbhsf_fifo_unselect(pipe, fifo); | |
726 | ||
727 | return ret; | |
e8d548d5 | 728 | } |
dad67397 | 729 | |
fcb42e23 | 730 | const struct usbhs_pkt_handle usbhs_fifo_pio_pop_handler = { |
dad67397 | 731 | .prepare = usbhsf_prepare_pop, |
0cb7e61d | 732 | .try_run = usbhsf_pio_try_pop, |
dad67397 KM |
733 | }; |
734 | ||
735 | /* | |
233f519d | 736 | * DCP ctrol statge handler |
dad67397 | 737 | */ |
97664a20 | 738 | static int usbhsf_ctrl_stage_end(struct usbhs_pkt *pkt, int *is_done) |
dad67397 | 739 | { |
97664a20 | 740 | usbhs_dcp_control_transfer_done(pkt->pipe); |
dad67397 | 741 | |
97664a20 | 742 | *is_done = 1; |
dad67397 KM |
743 | |
744 | return 0; | |
745 | } | |
746 | ||
fcb42e23 | 747 | const struct usbhs_pkt_handle usbhs_ctrl_stage_end_handler = { |
dad67397 KM |
748 | .prepare = usbhsf_ctrl_stage_end, |
749 | .try_run = usbhsf_ctrl_stage_end, | |
750 | }; | |
751 | ||
e73a9891 KM |
752 | /* |
753 | * DMA fifo functions | |
754 | */ | |
755 | static struct dma_chan *usbhsf_dma_chan_get(struct usbhs_fifo *fifo, | |
756 | struct usbhs_pkt *pkt) | |
757 | { | |
758 | if (&usbhs_fifo_dma_push_handler == pkt->handler) | |
759 | return fifo->tx_chan; | |
760 | ||
761 | if (&usbhs_fifo_dma_pop_handler == pkt->handler) | |
762 | return fifo->rx_chan; | |
763 | ||
764 | return NULL; | |
765 | } | |
766 | ||
767 | static struct usbhs_fifo *usbhsf_get_dma_fifo(struct usbhs_priv *priv, | |
768 | struct usbhs_pkt *pkt) | |
769 | { | |
770 | struct usbhs_fifo *fifo; | |
3a2634a5 | 771 | int i; |
e73a9891 | 772 | |
3a2634a5 YS |
773 | usbhs_for_each_dfifo(priv, fifo, i) { |
774 | if (usbhsf_dma_chan_get(fifo, pkt) && | |
775 | !usbhsf_fifo_is_busy(fifo)) | |
776 | return fifo; | |
777 | } | |
e73a9891 KM |
778 | |
779 | return NULL; | |
780 | } | |
781 | ||
782 | #define usbhsf_dma_start(p, f) __usbhsf_dma_ctrl(p, f, DREQE) | |
783 | #define usbhsf_dma_stop(p, f) __usbhsf_dma_ctrl(p, f, 0) | |
784 | static void __usbhsf_dma_ctrl(struct usbhs_pipe *pipe, | |
785 | struct usbhs_fifo *fifo, | |
786 | u16 dreqe) | |
787 | { | |
788 | struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe); | |
789 | ||
790 | usbhs_bset(priv, fifo->sel, DREQE, dreqe); | |
791 | } | |
792 | ||
e73a9891 KM |
793 | static int __usbhsf_dma_map_ctrl(struct usbhs_pkt *pkt, int map) |
794 | { | |
795 | struct usbhs_pipe *pipe = pkt->pipe; | |
796 | struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe); | |
797 | struct usbhs_pipe_info *info = usbhs_priv_to_pipeinfo(priv); | |
c3cdcac7 YS |
798 | struct usbhs_fifo *fifo = usbhs_pipe_to_fifo(pipe); |
799 | struct dma_chan *chan = usbhsf_dma_chan_get(fifo, pkt); | |
e73a9891 | 800 | |
c3cdcac7 | 801 | return info->dma_map_ctrl(chan->device->dev, pkt, map); |
e73a9891 KM |
802 | } |
803 | ||
804 | static void usbhsf_dma_complete(void *arg); | |
6e4b74e4 | 805 | static void xfer_work(struct work_struct *work) |
e73a9891 | 806 | { |
6e4b74e4 | 807 | struct usbhs_pkt *pkt = container_of(work, struct usbhs_pkt, work); |
e73a9891 | 808 | struct usbhs_pipe *pipe = pkt->pipe; |
4fdef698 | 809 | struct usbhs_fifo *fifo; |
e73a9891 | 810 | struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe); |
e73a9891 | 811 | struct dma_async_tx_descriptor *desc; |
4fdef698 | 812 | struct dma_chan *chan; |
e73a9891 | 813 | struct device *dev = usbhs_priv_to_dev(priv); |
55ba4e5e | 814 | enum dma_transfer_direction dir; |
4fdef698 YS |
815 | unsigned long flags; |
816 | ||
817 | usbhs_lock(priv, flags); | |
818 | fifo = usbhs_pipe_to_fifo(pipe); | |
819 | if (!fifo) | |
820 | goto xfer_work_end; | |
e73a9891 | 821 | |
4fdef698 | 822 | chan = usbhsf_dma_chan_get(fifo, pkt); |
55ba4e5e | 823 | dir = usbhs_pipe_is_dir_in(pipe) ? DMA_DEV_TO_MEM : DMA_MEM_TO_DEV; |
e73a9891 | 824 | |
2f0de9d8 KM |
825 | desc = dmaengine_prep_slave_single(chan, pkt->dma + pkt->actual, |
826 | pkt->trans, dir, | |
16052827 | 827 | DMA_PREP_INTERRUPT | DMA_CTRL_ACK); |
e73a9891 | 828 | if (!desc) |
4fdef698 | 829 | goto xfer_work_end; |
e73a9891 KM |
830 | |
831 | desc->callback = usbhsf_dma_complete; | |
832 | desc->callback_param = pipe; | |
833 | ||
ab330cf3 YS |
834 | pkt->cookie = dmaengine_submit(desc); |
835 | if (pkt->cookie < 0) { | |
e73a9891 | 836 | dev_err(dev, "Failed to submit dma descriptor\n"); |
4fdef698 | 837 | goto xfer_work_end; |
e73a9891 KM |
838 | } |
839 | ||
840 | dev_dbg(dev, " %s %d (%d/ %d)\n", | |
841 | fifo->name, usbhs_pipe_number(pipe), pkt->length, pkt->zero); | |
842 | ||
8355b2b3 | 843 | usbhs_pipe_running(pipe, 1); |
9b53d9af | 844 | usbhs_pipe_set_trans_count_if_bulk(pipe, pkt->trans); |
e73a9891 | 845 | dma_async_issue_pending(chan); |
29c7f3e6 | 846 | usbhsf_dma_start(pipe, fifo); |
9b53d9af | 847 | usbhs_pipe_enable(pipe); |
4fdef698 YS |
848 | |
849 | xfer_work_end: | |
850 | usbhs_unlock(priv, flags); | |
e73a9891 KM |
851 | } |
852 | ||
233f519d KM |
853 | /* |
854 | * DMA push handler | |
855 | */ | |
e73a9891 KM |
856 | static int usbhsf_dma_prepare_push(struct usbhs_pkt *pkt, int *is_done) |
857 | { | |
858 | struct usbhs_pipe *pipe = pkt->pipe; | |
859 | struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe); | |
860 | struct usbhs_fifo *fifo; | |
861 | int len = pkt->length - pkt->actual; | |
862 | int ret; | |
ab330cf3 | 863 | uintptr_t align_mask; |
e73a9891 KM |
864 | |
865 | if (usbhs_pipe_is_busy(pipe)) | |
866 | return 0; | |
867 | ||
868 | /* use PIO if packet is less than pio_dma_border or pipe is DCP */ | |
869 | if ((len < usbhs_get_dparam(priv, pio_dma_border)) || | |
700aa7ff | 870 | usbhs_pipe_type_is(pipe, USB_ENDPOINT_XFER_ISOC)) |
e73a9891 KM |
871 | goto usbhsf_pio_prepare_push; |
872 | ||
ab330cf3 YS |
873 | /* check data length if this driver don't use USB-DMAC */ |
874 | if (!usbhs_get_dparam(priv, has_usb_dmac) && len & 0x7) | |
e73a9891 KM |
875 | goto usbhsf_pio_prepare_push; |
876 | ||
ab330cf3 YS |
877 | /* check buffer alignment */ |
878 | align_mask = usbhs_get_dparam(priv, has_usb_dmac) ? | |
879 | USBHS_USB_DMAC_XFER_SIZE - 1 : 0x7; | |
880 | if ((uintptr_t)(pkt->buf + pkt->actual) & align_mask) | |
9a12d097 KM |
881 | goto usbhsf_pio_prepare_push; |
882 | ||
8355b2b3 YS |
883 | /* return at this time if the pipe is running */ |
884 | if (usbhs_pipe_is_running(pipe)) | |
885 | return 0; | |
886 | ||
e73a9891 KM |
887 | /* get enable DMA fifo */ |
888 | fifo = usbhsf_get_dma_fifo(priv, pkt); | |
889 | if (!fifo) | |
890 | goto usbhsf_pio_prepare_push; | |
891 | ||
e73a9891 KM |
892 | ret = usbhsf_fifo_select(pipe, fifo, 0); |
893 | if (ret < 0) | |
e789ece1 YS |
894 | goto usbhsf_pio_prepare_push; |
895 | ||
896 | if (usbhsf_dma_map(pkt) < 0) | |
897 | goto usbhsf_pio_prepare_push_unselect; | |
e73a9891 KM |
898 | |
899 | pkt->trans = len; | |
900 | ||
6490865c | 901 | usbhsf_tx_irq_ctrl(pipe, 0); |
6e4b74e4 GL |
902 | INIT_WORK(&pkt->work, xfer_work); |
903 | schedule_work(&pkt->work); | |
e73a9891 KM |
904 | |
905 | return 0; | |
906 | ||
e789ece1 YS |
907 | usbhsf_pio_prepare_push_unselect: |
908 | usbhsf_fifo_unselect(pipe, fifo); | |
e73a9891 KM |
909 | usbhsf_pio_prepare_push: |
910 | /* | |
911 | * change handler to PIO | |
912 | */ | |
913 | pkt->handler = &usbhs_fifo_pio_push_handler; | |
914 | ||
915 | return pkt->handler->prepare(pkt, is_done); | |
916 | } | |
917 | ||
918 | static int usbhsf_dma_push_done(struct usbhs_pkt *pkt, int *is_done) | |
919 | { | |
920 | struct usbhs_pipe *pipe = pkt->pipe; | |
c0ed8b23 | 921 | int is_short = pkt->trans % usbhs_pipe_get_maxpacket(pipe); |
e73a9891 | 922 | |
c0ed8b23 YS |
923 | pkt->actual += pkt->trans; |
924 | ||
925 | if (pkt->actual < pkt->length) | |
926 | *is_done = 0; /* there are remainder data */ | |
927 | else if (is_short) | |
928 | *is_done = 1; /* short packet */ | |
929 | else | |
930 | *is_done = !pkt->zero; /* send zero packet? */ | |
e73a9891 | 931 | |
8355b2b3 | 932 | usbhs_pipe_running(pipe, !*is_done); |
e73a9891 KM |
933 | |
934 | usbhsf_dma_stop(pipe, pipe->fifo); | |
935 | usbhsf_dma_unmap(pkt); | |
936 | usbhsf_fifo_unselect(pipe, pipe->fifo); | |
937 | ||
c0ed8b23 YS |
938 | if (!*is_done) { |
939 | /* change handler to PIO */ | |
940 | pkt->handler = &usbhs_fifo_pio_push_handler; | |
941 | return pkt->handler->try_run(pkt, is_done); | |
942 | } | |
943 | ||
e73a9891 KM |
944 | return 0; |
945 | } | |
946 | ||
fcb42e23 | 947 | const struct usbhs_pkt_handle usbhs_fifo_dma_push_handler = { |
e73a9891 KM |
948 | .prepare = usbhsf_dma_prepare_push, |
949 | .dma_done = usbhsf_dma_push_done, | |
950 | }; | |
951 | ||
233f519d KM |
952 | /* |
953 | * DMA pop handler | |
954 | */ | |
ab330cf3 YS |
955 | |
956 | static int usbhsf_dma_prepare_pop_with_rx_irq(struct usbhs_pkt *pkt, | |
957 | int *is_done) | |
958 | { | |
959 | return usbhsf_prepare_pop(pkt, is_done); | |
960 | } | |
961 | ||
962 | static int usbhsf_dma_prepare_pop_with_usb_dmac(struct usbhs_pkt *pkt, | |
963 | int *is_done) | |
964 | { | |
965 | struct usbhs_pipe *pipe = pkt->pipe; | |
966 | struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe); | |
967 | struct usbhs_fifo *fifo; | |
968 | int ret; | |
969 | ||
970 | if (usbhs_pipe_is_busy(pipe)) | |
971 | return 0; | |
972 | ||
973 | /* use PIO if packet is less than pio_dma_border or pipe is DCP */ | |
974 | if ((pkt->length < usbhs_get_dparam(priv, pio_dma_border)) || | |
700aa7ff | 975 | usbhs_pipe_type_is(pipe, USB_ENDPOINT_XFER_ISOC)) |
ab330cf3 YS |
976 | goto usbhsf_pio_prepare_pop; |
977 | ||
978 | fifo = usbhsf_get_dma_fifo(priv, pkt); | |
979 | if (!fifo) | |
980 | goto usbhsf_pio_prepare_pop; | |
981 | ||
982 | if ((uintptr_t)pkt->buf & (USBHS_USB_DMAC_XFER_SIZE - 1)) | |
983 | goto usbhsf_pio_prepare_pop; | |
984 | ||
985 | usbhs_pipe_config_change_bfre(pipe, 1); | |
986 | ||
987 | ret = usbhsf_fifo_select(pipe, fifo, 0); | |
988 | if (ret < 0) | |
989 | goto usbhsf_pio_prepare_pop; | |
990 | ||
991 | if (usbhsf_dma_map(pkt) < 0) | |
992 | goto usbhsf_pio_prepare_pop_unselect; | |
993 | ||
994 | /* DMA */ | |
995 | ||
996 | /* | |
997 | * usbhs_fifo_dma_pop_handler :: prepare | |
998 | * enabled irq to come here. | |
999 | * but it is no longer needed for DMA. disable it. | |
1000 | */ | |
1001 | usbhsf_rx_irq_ctrl(pipe, 0); | |
1002 | ||
1003 | pkt->trans = pkt->length; | |
1004 | ||
1005 | INIT_WORK(&pkt->work, xfer_work); | |
1006 | schedule_work(&pkt->work); | |
1007 | ||
1008 | return 0; | |
1009 | ||
1010 | usbhsf_pio_prepare_pop_unselect: | |
1011 | usbhsf_fifo_unselect(pipe, fifo); | |
1012 | usbhsf_pio_prepare_pop: | |
1013 | ||
1014 | /* | |
1015 | * change handler to PIO | |
1016 | */ | |
1017 | pkt->handler = &usbhs_fifo_pio_pop_handler; | |
1018 | usbhs_pipe_config_change_bfre(pipe, 0); | |
1019 | ||
1020 | return pkt->handler->prepare(pkt, is_done); | |
1021 | } | |
1022 | ||
1023 | static int usbhsf_dma_prepare_pop(struct usbhs_pkt *pkt, int *is_done) | |
1024 | { | |
1025 | struct usbhs_priv *priv = usbhs_pipe_to_priv(pkt->pipe); | |
1026 | ||
1027 | if (usbhs_get_dparam(priv, has_usb_dmac)) | |
1028 | return usbhsf_dma_prepare_pop_with_usb_dmac(pkt, is_done); | |
1029 | else | |
1030 | return usbhsf_dma_prepare_pop_with_rx_irq(pkt, is_done); | |
1031 | } | |
1032 | ||
1033 | static int usbhsf_dma_try_pop_with_rx_irq(struct usbhs_pkt *pkt, int *is_done) | |
e73a9891 KM |
1034 | { |
1035 | struct usbhs_pipe *pipe = pkt->pipe; | |
1036 | struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe); | |
1037 | struct usbhs_fifo *fifo; | |
1038 | int len, ret; | |
1039 | ||
1040 | if (usbhs_pipe_is_busy(pipe)) | |
1041 | return 0; | |
1042 | ||
1043 | if (usbhs_pipe_is_dcp(pipe)) | |
1044 | goto usbhsf_pio_prepare_pop; | |
1045 | ||
1046 | /* get enable DMA fifo */ | |
1047 | fifo = usbhsf_get_dma_fifo(priv, pkt); | |
1048 | if (!fifo) | |
1049 | goto usbhsf_pio_prepare_pop; | |
1050 | ||
c9ae0c91 | 1051 | if ((uintptr_t)(pkt->buf + pkt->actual) & 0x7) /* 8byte alignment */ |
9a12d097 KM |
1052 | goto usbhsf_pio_prepare_pop; |
1053 | ||
e73a9891 KM |
1054 | ret = usbhsf_fifo_select(pipe, fifo, 0); |
1055 | if (ret < 0) | |
1056 | goto usbhsf_pio_prepare_pop; | |
1057 | ||
1058 | /* use PIO if packet is less than pio_dma_border */ | |
1059 | len = usbhsf_fifo_rcv_len(priv, fifo); | |
1060 | len = min(pkt->length - pkt->actual, len); | |
77975eec | 1061 | if (len & 0x7) /* 8byte alignment */ |
e73a9891 KM |
1062 | goto usbhsf_pio_prepare_pop_unselect; |
1063 | ||
1064 | if (len < usbhs_get_dparam(priv, pio_dma_border)) | |
1065 | goto usbhsf_pio_prepare_pop_unselect; | |
1066 | ||
1067 | ret = usbhsf_fifo_barrier(priv, fifo); | |
1068 | if (ret < 0) | |
1069 | goto usbhsf_pio_prepare_pop_unselect; | |
1070 | ||
1071 | if (usbhsf_dma_map(pkt) < 0) | |
1072 | goto usbhsf_pio_prepare_pop_unselect; | |
1073 | ||
1074 | /* DMA */ | |
1075 | ||
1076 | /* | |
1077 | * usbhs_fifo_dma_pop_handler :: prepare | |
1078 | * enabled irq to come here. | |
1079 | * but it is no longer needed for DMA. disable it. | |
1080 | */ | |
1081 | usbhsf_rx_irq_ctrl(pipe, 0); | |
1082 | ||
1083 | pkt->trans = len; | |
1084 | ||
6e4b74e4 GL |
1085 | INIT_WORK(&pkt->work, xfer_work); |
1086 | schedule_work(&pkt->work); | |
e73a9891 KM |
1087 | |
1088 | return 0; | |
1089 | ||
1090 | usbhsf_pio_prepare_pop_unselect: | |
1091 | usbhsf_fifo_unselect(pipe, fifo); | |
1092 | usbhsf_pio_prepare_pop: | |
1093 | ||
1094 | /* | |
1095 | * change handler to PIO | |
1096 | */ | |
1097 | pkt->handler = &usbhs_fifo_pio_pop_handler; | |
1098 | ||
1099 | return pkt->handler->try_run(pkt, is_done); | |
1100 | } | |
1101 | ||
ab330cf3 YS |
1102 | static int usbhsf_dma_try_pop(struct usbhs_pkt *pkt, int *is_done) |
1103 | { | |
1104 | struct usbhs_priv *priv = usbhs_pipe_to_priv(pkt->pipe); | |
1105 | ||
1106 | BUG_ON(usbhs_get_dparam(priv, has_usb_dmac)); | |
1107 | ||
1108 | return usbhsf_dma_try_pop_with_rx_irq(pkt, is_done); | |
1109 | } | |
1110 | ||
1111 | static int usbhsf_dma_pop_done_with_rx_irq(struct usbhs_pkt *pkt, int *is_done) | |
e73a9891 KM |
1112 | { |
1113 | struct usbhs_pipe *pipe = pkt->pipe; | |
1114 | int maxp = usbhs_pipe_get_maxpacket(pipe); | |
1115 | ||
1116 | usbhsf_dma_stop(pipe, pipe->fifo); | |
1117 | usbhsf_dma_unmap(pkt); | |
1118 | usbhsf_fifo_unselect(pipe, pipe->fifo); | |
1119 | ||
1120 | pkt->actual += pkt->trans; | |
1121 | ||
1122 | if ((pkt->actual == pkt->length) || /* receive all data */ | |
1123 | (pkt->trans < maxp)) { /* short packet */ | |
1124 | *is_done = 1; | |
8355b2b3 | 1125 | usbhs_pipe_running(pipe, 0); |
e73a9891 KM |
1126 | } else { |
1127 | /* re-enable */ | |
8355b2b3 | 1128 | usbhs_pipe_running(pipe, 0); |
e73a9891 KM |
1129 | usbhsf_prepare_pop(pkt, is_done); |
1130 | } | |
1131 | ||
1132 | return 0; | |
1133 | } | |
1134 | ||
ab330cf3 YS |
1135 | static size_t usbhs_dma_calc_received_size(struct usbhs_pkt *pkt, |
1136 | struct dma_chan *chan, int dtln) | |
1137 | { | |
1138 | struct usbhs_pipe *pipe = pkt->pipe; | |
1139 | struct dma_tx_state state; | |
1140 | size_t received_size; | |
1141 | int maxp = usbhs_pipe_get_maxpacket(pipe); | |
1142 | ||
1143 | dmaengine_tx_status(chan, pkt->cookie, &state); | |
1144 | received_size = pkt->length - state.residue; | |
1145 | ||
1146 | if (dtln) { | |
1147 | received_size -= USBHS_USB_DMAC_XFER_SIZE; | |
1148 | received_size &= ~(maxp - 1); | |
1149 | received_size += dtln; | |
1150 | } | |
1151 | ||
1152 | return received_size; | |
1153 | } | |
1154 | ||
1155 | static int usbhsf_dma_pop_done_with_usb_dmac(struct usbhs_pkt *pkt, | |
1156 | int *is_done) | |
1157 | { | |
1158 | struct usbhs_pipe *pipe = pkt->pipe; | |
1159 | struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe); | |
1160 | struct usbhs_fifo *fifo = usbhs_pipe_to_fifo(pipe); | |
1161 | struct dma_chan *chan = usbhsf_dma_chan_get(fifo, pkt); | |
1162 | int rcv_len; | |
1163 | ||
1164 | /* | |
1165 | * Since the driver disables rx_irq in DMA mode, the interrupt handler | |
1166 | * cannot the BRDYSTS. So, the function clears it here because the | |
1167 | * driver may use PIO mode next time. | |
1168 | */ | |
1169 | usbhs_xxxsts_clear(priv, BRDYSTS, usbhs_pipe_number(pipe)); | |
1170 | ||
1171 | rcv_len = usbhsf_fifo_rcv_len(priv, fifo); | |
1172 | usbhsf_fifo_clear(pipe, fifo); | |
1173 | pkt->actual = usbhs_dma_calc_received_size(pkt, chan, rcv_len); | |
1174 | ||
1175 | usbhsf_dma_stop(pipe, fifo); | |
1176 | usbhsf_dma_unmap(pkt); | |
1177 | usbhsf_fifo_unselect(pipe, pipe->fifo); | |
1178 | ||
1179 | /* The driver can assume the rx transaction is always "done" */ | |
1180 | *is_done = 1; | |
1181 | ||
1182 | return 0; | |
1183 | } | |
1184 | ||
1185 | static int usbhsf_dma_pop_done(struct usbhs_pkt *pkt, int *is_done) | |
1186 | { | |
1187 | struct usbhs_priv *priv = usbhs_pipe_to_priv(pkt->pipe); | |
1188 | ||
1189 | if (usbhs_get_dparam(priv, has_usb_dmac)) | |
1190 | return usbhsf_dma_pop_done_with_usb_dmac(pkt, is_done); | |
1191 | else | |
1192 | return usbhsf_dma_pop_done_with_rx_irq(pkt, is_done); | |
1193 | } | |
1194 | ||
fcb42e23 | 1195 | const struct usbhs_pkt_handle usbhs_fifo_dma_pop_handler = { |
ab330cf3 | 1196 | .prepare = usbhsf_dma_prepare_pop, |
e73a9891 KM |
1197 | .try_run = usbhsf_dma_try_pop, |
1198 | .dma_done = usbhsf_dma_pop_done | |
1199 | }; | |
1200 | ||
1201 | /* | |
1202 | * DMA setting | |
1203 | */ | |
1204 | static bool usbhsf_dma_filter(struct dma_chan *chan, void *param) | |
1205 | { | |
1206 | struct sh_dmae_slave *slave = param; | |
1207 | ||
1208 | /* | |
1209 | * FIXME | |
1210 | * | |
1211 | * usbhs doesn't recognize id = 0 as valid DMA | |
1212 | */ | |
f19b7e0d | 1213 | if (0 == slave->shdma_slave.slave_id) |
e73a9891 KM |
1214 | return false; |
1215 | ||
1216 | chan->private = slave; | |
1217 | ||
1218 | return true; | |
1219 | } | |
1220 | ||
1221 | static void usbhsf_dma_quit(struct usbhs_priv *priv, struct usbhs_fifo *fifo) | |
1222 | { | |
1223 | if (fifo->tx_chan) | |
1224 | dma_release_channel(fifo->tx_chan); | |
1225 | if (fifo->rx_chan) | |
1226 | dma_release_channel(fifo->rx_chan); | |
1227 | ||
1228 | fifo->tx_chan = NULL; | |
1229 | fifo->rx_chan = NULL; | |
1230 | } | |
1231 | ||
6e3f53ab | 1232 | static void usbhsf_dma_init_pdev(struct usbhs_fifo *fifo) |
e73a9891 | 1233 | { |
e73a9891 KM |
1234 | dma_cap_mask_t mask; |
1235 | ||
1236 | dma_cap_zero(mask); | |
1237 | dma_cap_set(DMA_SLAVE, mask); | |
1238 | fifo->tx_chan = dma_request_channel(mask, usbhsf_dma_filter, | |
1239 | &fifo->tx_slave); | |
1240 | ||
1241 | dma_cap_zero(mask); | |
1242 | dma_cap_set(DMA_SLAVE, mask); | |
1243 | fifo->rx_chan = dma_request_channel(mask, usbhsf_dma_filter, | |
1244 | &fifo->rx_slave); | |
6e3f53ab YS |
1245 | } |
1246 | ||
7a96b784 YS |
1247 | static void usbhsf_dma_init_dt(struct device *dev, struct usbhs_fifo *fifo, |
1248 | int channel) | |
abd2dbf6 | 1249 | { |
7a96b784 YS |
1250 | char name[16]; |
1251 | ||
7cc99f1e YS |
1252 | /* |
1253 | * To avoid complex handing for DnFIFOs, the driver uses each | |
1254 | * DnFIFO as TX or RX direction (not bi-direction). | |
1255 | * So, the driver uses odd channels for TX, even channels for RX. | |
1256 | */ | |
1257 | snprintf(name, sizeof(name), "ch%d", channel); | |
1258 | if (channel & 1) { | |
1259 | fifo->tx_chan = dma_request_slave_channel_reason(dev, name); | |
1260 | if (IS_ERR(fifo->tx_chan)) | |
1261 | fifo->tx_chan = NULL; | |
1262 | } else { | |
1263 | fifo->rx_chan = dma_request_slave_channel_reason(dev, name); | |
1264 | if (IS_ERR(fifo->rx_chan)) | |
1265 | fifo->rx_chan = NULL; | |
1266 | } | |
abd2dbf6 YS |
1267 | } |
1268 | ||
7a96b784 YS |
1269 | static void usbhsf_dma_init(struct usbhs_priv *priv, struct usbhs_fifo *fifo, |
1270 | int channel) | |
6e3f53ab YS |
1271 | { |
1272 | struct device *dev = usbhs_priv_to_dev(priv); | |
1273 | ||
abd2dbf6 | 1274 | if (dev->of_node) |
7a96b784 | 1275 | usbhsf_dma_init_dt(dev, fifo, channel); |
abd2dbf6 YS |
1276 | else |
1277 | usbhsf_dma_init_pdev(fifo); | |
e73a9891 KM |
1278 | |
1279 | if (fifo->tx_chan || fifo->rx_chan) | |
4ce68805 | 1280 | dev_dbg(dev, "enable DMAEngine (%s%s%s)\n", |
e73a9891 KM |
1281 | fifo->name, |
1282 | fifo->tx_chan ? "[TX]" : " ", | |
1283 | fifo->rx_chan ? "[RX]" : " "); | |
1284 | } | |
1285 | ||
dad67397 KM |
1286 | /* |
1287 | * irq functions | |
1288 | */ | |
1289 | static int usbhsf_irq_empty(struct usbhs_priv *priv, | |
1290 | struct usbhs_irq_state *irq_state) | |
1291 | { | |
1292 | struct usbhs_pipe *pipe; | |
dad67397 KM |
1293 | struct device *dev = usbhs_priv_to_dev(priv); |
1294 | int i, ret; | |
1295 | ||
1296 | if (!irq_state->bempsts) { | |
1297 | dev_err(dev, "debug %s !!\n", __func__); | |
1298 | return -EIO; | |
1299 | } | |
1300 | ||
1301 | dev_dbg(dev, "irq empty [0x%04x]\n", irq_state->bempsts); | |
1302 | ||
1303 | /* | |
1304 | * search interrupted "pipe" | |
1305 | * not "uep". | |
1306 | */ | |
1307 | usbhs_for_each_pipe_with_dcp(pipe, priv, i) { | |
1308 | if (!(irq_state->bempsts & (1 << i))) | |
1309 | continue; | |
1310 | ||
51b8a021 | 1311 | ret = usbhsf_pkt_handler(pipe, USBHSF_PKT_TRY_RUN); |
dad67397 KM |
1312 | if (ret < 0) |
1313 | dev_err(dev, "irq_empty run_error %d : %d\n", i, ret); | |
1314 | } | |
1315 | ||
1316 | return 0; | |
1317 | } | |
1318 | ||
1319 | static int usbhsf_irq_ready(struct usbhs_priv *priv, | |
1320 | struct usbhs_irq_state *irq_state) | |
1321 | { | |
1322 | struct usbhs_pipe *pipe; | |
dad67397 KM |
1323 | struct device *dev = usbhs_priv_to_dev(priv); |
1324 | int i, ret; | |
1325 | ||
1326 | if (!irq_state->brdysts) { | |
1327 | dev_err(dev, "debug %s !!\n", __func__); | |
1328 | return -EIO; | |
1329 | } | |
1330 | ||
1331 | dev_dbg(dev, "irq ready [0x%04x]\n", irq_state->brdysts); | |
1332 | ||
1333 | /* | |
1334 | * search interrupted "pipe" | |
1335 | * not "uep". | |
1336 | */ | |
1337 | usbhs_for_each_pipe_with_dcp(pipe, priv, i) { | |
1338 | if (!(irq_state->brdysts & (1 << i))) | |
1339 | continue; | |
1340 | ||
51b8a021 | 1341 | ret = usbhsf_pkt_handler(pipe, USBHSF_PKT_TRY_RUN); |
dad67397 KM |
1342 | if (ret < 0) |
1343 | dev_err(dev, "irq_ready run_error %d : %d\n", i, ret); | |
1344 | } | |
1345 | ||
1346 | return 0; | |
1347 | } | |
1348 | ||
e73a9891 KM |
1349 | static void usbhsf_dma_complete(void *arg) |
1350 | { | |
1351 | struct usbhs_pipe *pipe = arg; | |
1352 | struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe); | |
1353 | struct device *dev = usbhs_priv_to_dev(priv); | |
1354 | int ret; | |
1355 | ||
51b8a021 | 1356 | ret = usbhsf_pkt_handler(pipe, USBHSF_PKT_DMA_DONE); |
e73a9891 KM |
1357 | if (ret < 0) |
1358 | dev_err(dev, "dma_complete run_error %d : %d\n", | |
1359 | usbhs_pipe_number(pipe), ret); | |
1360 | } | |
1361 | ||
cdeb7943 YS |
1362 | void usbhs_fifo_clear_dcp(struct usbhs_pipe *pipe) |
1363 | { | |
1364 | struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe); | |
1365 | struct usbhs_fifo *fifo = usbhsf_get_cfifo(priv); /* CFIFO */ | |
1366 | ||
1367 | /* clear DCP FIFO of transmission */ | |
1368 | if (usbhsf_fifo_select(pipe, fifo, 1) < 0) | |
1369 | return; | |
1370 | usbhsf_fifo_clear(pipe, fifo); | |
1371 | usbhsf_fifo_unselect(pipe, fifo); | |
1372 | ||
1373 | /* clear DCP FIFO of reception */ | |
1374 | if (usbhsf_fifo_select(pipe, fifo, 0) < 0) | |
1375 | return; | |
1376 | usbhsf_fifo_clear(pipe, fifo); | |
1377 | usbhsf_fifo_unselect(pipe, fifo); | |
1378 | } | |
1379 | ||
dad67397 KM |
1380 | /* |
1381 | * fifo init | |
1382 | */ | |
1383 | void usbhs_fifo_init(struct usbhs_priv *priv) | |
1384 | { | |
1385 | struct usbhs_mod *mod = usbhs_mod_get_current(priv); | |
d77e3f4e | 1386 | struct usbhs_fifo *cfifo = usbhsf_get_cfifo(priv); |
3a2634a5 YS |
1387 | struct usbhs_fifo *dfifo; |
1388 | int i; | |
dad67397 KM |
1389 | |
1390 | mod->irq_empty = usbhsf_irq_empty; | |
1391 | mod->irq_ready = usbhsf_irq_ready; | |
1392 | mod->irq_bempsts = 0; | |
1393 | mod->irq_brdysts = 0; | |
d77e3f4e KM |
1394 | |
1395 | cfifo->pipe = NULL; | |
3a2634a5 YS |
1396 | usbhs_for_each_dfifo(priv, dfifo, i) |
1397 | dfifo->pipe = NULL; | |
dad67397 KM |
1398 | } |
1399 | ||
1400 | void usbhs_fifo_quit(struct usbhs_priv *priv) | |
1401 | { | |
1402 | struct usbhs_mod *mod = usbhs_mod_get_current(priv); | |
1403 | ||
1404 | mod->irq_empty = NULL; | |
1405 | mod->irq_ready = NULL; | |
1406 | mod->irq_bempsts = 0; | |
1407 | mod->irq_brdysts = 0; | |
1408 | } | |
d3af90a5 | 1409 | |
53e734b1 | 1410 | #define __USBHS_DFIFO_INIT(priv, fifo, channel, fifo_port) \ |
3a2634a5 YS |
1411 | do { \ |
1412 | fifo = usbhsf_get_dnfifo(priv, channel); \ | |
1413 | fifo->name = "D"#channel"FIFO"; \ | |
53e734b1 | 1414 | fifo->port = fifo_port; \ |
3a2634a5 YS |
1415 | fifo->sel = D##channel##FIFOSEL; \ |
1416 | fifo->ctr = D##channel##FIFOCTR; \ | |
1417 | fifo->tx_slave.shdma_slave.slave_id = \ | |
1418 | usbhs_get_dparam(priv, d##channel##_tx_id); \ | |
1419 | fifo->rx_slave.shdma_slave.slave_id = \ | |
1420 | usbhs_get_dparam(priv, d##channel##_rx_id); \ | |
7a96b784 | 1421 | usbhsf_dma_init(priv, fifo, channel); \ |
3a2634a5 YS |
1422 | } while (0) |
1423 | ||
53e734b1 YS |
1424 | #define USBHS_DFIFO_INIT(priv, fifo, channel) \ |
1425 | __USBHS_DFIFO_INIT(priv, fifo, channel, D##channel##FIFO) | |
1426 | #define USBHS_DFIFO_INIT_NO_PORT(priv, fifo, channel) \ | |
1427 | __USBHS_DFIFO_INIT(priv, fifo, channel, 0) | |
1428 | ||
d3af90a5 KM |
1429 | int usbhs_fifo_probe(struct usbhs_priv *priv) |
1430 | { | |
1431 | struct usbhs_fifo *fifo; | |
1432 | ||
1433 | /* CFIFO */ | |
1434 | fifo = usbhsf_get_cfifo(priv); | |
e73a9891 | 1435 | fifo->name = "CFIFO"; |
d3af90a5 KM |
1436 | fifo->port = CFIFO; |
1437 | fifo->sel = CFIFOSEL; | |
1438 | fifo->ctr = CFIFOCTR; | |
1439 | ||
3a2634a5 YS |
1440 | /* DFIFO */ |
1441 | USBHS_DFIFO_INIT(priv, fifo, 0); | |
1442 | USBHS_DFIFO_INIT(priv, fifo, 1); | |
d3cf6a4b YS |
1443 | USBHS_DFIFO_INIT_NO_PORT(priv, fifo, 2); |
1444 | USBHS_DFIFO_INIT_NO_PORT(priv, fifo, 3); | |
e73a9891 | 1445 | |
d3af90a5 KM |
1446 | return 0; |
1447 | } | |
1448 | ||
1449 | void usbhs_fifo_remove(struct usbhs_priv *priv) | |
1450 | { | |
3a2634a5 YS |
1451 | struct usbhs_fifo *fifo; |
1452 | int i; | |
1453 | ||
1454 | usbhs_for_each_dfifo(priv, fifo, i) | |
1455 | usbhsf_dma_quit(priv, fifo); | |
d3af90a5 | 1456 | } |