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> | |
19 | #include "./common.h" | |
20 | #include "./pipe.h" | |
21 | ||
4bd04811 KM |
22 | /* |
23 | * packet info function | |
24 | */ | |
dad67397 KM |
25 | static int usbhsf_null_handle(struct usbhs_pkt *pkt) |
26 | { | |
27 | struct usbhs_priv *priv = usbhs_pipe_to_priv(pkt->pipe); | |
28 | struct device *dev = usbhs_priv_to_dev(priv); | |
29 | ||
30 | dev_err(dev, "null handler\n"); | |
31 | ||
32 | return -EINVAL; | |
33 | } | |
34 | ||
35 | static struct usbhs_pkt_handle usbhsf_null_handler = { | |
36 | .prepare = usbhsf_null_handle, | |
37 | .try_run = usbhsf_null_handle, | |
38 | }; | |
39 | ||
6acb95d4 KM |
40 | void usbhs_pkt_init(struct usbhs_pkt *pkt) |
41 | { | |
42 | INIT_LIST_HEAD(&pkt->node); | |
43 | } | |
44 | ||
659d4954 | 45 | void usbhs_pkt_push(struct usbhs_pipe *pipe, struct usbhs_pkt *pkt, |
dad67397 | 46 | struct usbhs_pkt_handle *handler, |
659d4954 | 47 | void *buf, int len, int zero) |
6acb95d4 | 48 | { |
dad67397 KM |
49 | struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe); |
50 | struct device *dev = usbhs_priv_to_dev(priv); | |
51 | ||
52 | if (!handler) { | |
53 | dev_err(dev, "no handler function\n"); | |
54 | handler = &usbhsf_null_handler; | |
55 | } | |
56 | ||
6acb95d4 KM |
57 | list_del_init(&pkt->node); |
58 | list_add_tail(&pkt->node, &pipe->list); | |
59 | ||
659d4954 KM |
60 | pkt->pipe = pipe; |
61 | pkt->buf = buf; | |
dad67397 | 62 | pkt->handler = handler; |
659d4954 KM |
63 | pkt->length = len; |
64 | pkt->zero = zero; | |
65 | pkt->actual = 0; | |
6acb95d4 KM |
66 | } |
67 | ||
68 | void usbhs_pkt_pop(struct usbhs_pkt *pkt) | |
69 | { | |
70 | list_del_init(&pkt->node); | |
71 | } | |
72 | ||
73 | struct usbhs_pkt *usbhs_pkt_get(struct usbhs_pipe *pipe) | |
74 | { | |
75 | if (list_empty(&pipe->list)) | |
76 | return NULL; | |
77 | ||
78 | return list_entry(pipe->list.next, struct usbhs_pkt, node); | |
79 | } | |
80 | ||
659d4954 KM |
81 | /* |
82 | * irq enable/disable function | |
83 | */ | |
84 | #define usbhsf_irq_empty_ctrl(p, e) usbhsf_irq_callback_ctrl(p, bempsts, e) | |
85 | #define usbhsf_irq_ready_ctrl(p, e) usbhsf_irq_callback_ctrl(p, brdysts, e) | |
86 | #define usbhsf_irq_callback_ctrl(pipe, status, enable) \ | |
87 | ({ \ | |
88 | struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe); \ | |
89 | struct usbhs_mod *mod = usbhs_mod_get_current(priv); \ | |
90 | u16 status = (1 << usbhs_pipe_number(pipe)); \ | |
91 | if (!mod) \ | |
92 | return; \ | |
93 | if (enable) \ | |
94 | mod->irq_##status |= status; \ | |
95 | else \ | |
96 | mod->irq_##status &= ~status; \ | |
97 | usbhs_irq_callback_update(priv, mod); \ | |
98 | }) | |
99 | ||
100 | static void usbhsf_tx_irq_ctrl(struct usbhs_pipe *pipe, int enable) | |
101 | { | |
102 | /* | |
103 | * And DCP pipe can NOT use "ready interrupt" for "send" | |
104 | * it should use "empty" interrupt. | |
105 | * see | |
106 | * "Operation" - "Interrupt Function" - "BRDY Interrupt" | |
107 | * | |
108 | * on the other hand, normal pipe can use "ready interrupt" for "send" | |
109 | * even though it is single/double buffer | |
110 | */ | |
111 | if (usbhs_pipe_is_dcp(pipe)) | |
112 | usbhsf_irq_empty_ctrl(pipe, enable); | |
113 | else | |
114 | usbhsf_irq_ready_ctrl(pipe, enable); | |
115 | } | |
116 | ||
117 | static void usbhsf_rx_irq_ctrl(struct usbhs_pipe *pipe, int enable) | |
118 | { | |
119 | usbhsf_irq_ready_ctrl(pipe, enable); | |
120 | } | |
121 | ||
e8d548d5 KM |
122 | /* |
123 | * FIFO ctrl | |
124 | */ | |
125 | static void usbhsf_send_terminator(struct usbhs_pipe *pipe) | |
126 | { | |
127 | struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe); | |
128 | ||
129 | usbhs_bset(priv, CFIFOCTR, BVAL, BVAL); | |
130 | } | |
131 | ||
132 | static int usbhsf_fifo_barrier(struct usbhs_priv *priv) | |
133 | { | |
134 | int timeout = 1024; | |
135 | ||
136 | do { | |
137 | /* The FIFO port is accessible */ | |
138 | if (usbhs_read(priv, CFIFOCTR) & FRDY) | |
139 | return 0; | |
140 | ||
141 | udelay(10); | |
142 | } while (timeout--); | |
143 | ||
144 | return -EBUSY; | |
145 | } | |
146 | ||
147 | static void usbhsf_fifo_clear(struct usbhs_pipe *pipe) | |
148 | { | |
149 | struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe); | |
150 | ||
151 | if (!usbhs_pipe_is_dcp(pipe)) | |
152 | usbhsf_fifo_barrier(priv); | |
153 | ||
154 | usbhs_write(priv, CFIFOCTR, BCLR); | |
155 | } | |
156 | ||
157 | static int usbhsf_fifo_rcv_len(struct usbhs_priv *priv) | |
158 | { | |
159 | return usbhs_read(priv, CFIFOCTR) & DTLN_MASK; | |
160 | } | |
161 | ||
162 | static int usbhsf_fifo_select(struct usbhs_pipe *pipe, int write) | |
163 | { | |
164 | struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe); | |
165 | struct device *dev = usbhs_priv_to_dev(priv); | |
166 | int timeout = 1024; | |
167 | u16 mask = ((1 << 5) | 0xF); /* mask of ISEL | CURPIPE */ | |
168 | u16 base = usbhs_pipe_number(pipe); /* CURPIPE */ | |
169 | ||
170 | if (usbhs_pipe_is_dcp(pipe)) | |
171 | base |= (1 == write) << 5; /* ISEL */ | |
172 | ||
173 | /* "base" will be used below */ | |
174 | usbhs_write(priv, CFIFOSEL, base | MBW_32); | |
175 | ||
176 | /* check ISEL and CURPIPE value */ | |
177 | while (timeout--) { | |
178 | if (base == (mask & usbhs_read(priv, CFIFOSEL))) | |
179 | return 0; | |
180 | udelay(10); | |
181 | } | |
182 | ||
183 | dev_err(dev, "fifo select error\n"); | |
184 | ||
185 | return -EIO; | |
186 | } | |
187 | ||
188 | /* | |
189 | * PIO fifo functions | |
190 | */ | |
dad67397 | 191 | static int usbhsf_try_push(struct usbhs_pkt *pkt) |
e8d548d5 | 192 | { |
4bd04811 | 193 | struct usbhs_pipe *pipe = pkt->pipe; |
e8d548d5 | 194 | struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe); |
4bd04811 | 195 | struct usbhs_pipe_info *info = usbhs_priv_to_pipeinfo(priv); |
659d4954 | 196 | struct device *dev = usbhs_priv_to_dev(priv); |
e8d548d5 | 197 | void __iomem *addr = priv->base + CFIFO; |
659d4954 | 198 | u8 *buf; |
e8d548d5 KM |
199 | int maxp = usbhs_pipe_get_maxpacket(pipe); |
200 | int total_len; | |
4bd04811 | 201 | int i, ret, len; |
659d4954 | 202 | int is_short, is_done; |
e8d548d5 | 203 | |
dad67397 | 204 | ret = usbhsf_fifo_select(pipe, 1); |
e8d548d5 | 205 | if (ret < 0) |
659d4954 | 206 | goto usbhs_fifo_write_busy; |
e8d548d5 | 207 | |
dad67397 | 208 | ret = usbhs_pipe_is_accessible(pipe); |
e8d548d5 | 209 | if (ret < 0) |
659d4954 | 210 | goto usbhs_fifo_write_busy; |
e8d548d5 KM |
211 | |
212 | ret = usbhsf_fifo_barrier(priv); | |
213 | if (ret < 0) | |
659d4954 | 214 | goto usbhs_fifo_write_busy; |
e8d548d5 | 215 | |
659d4954 KM |
216 | buf = pkt->buf + pkt->actual; |
217 | len = pkt->length - pkt->actual; | |
218 | len = min(len, maxp); | |
219 | total_len = len; | |
220 | is_short = total_len < maxp; | |
e8d548d5 KM |
221 | |
222 | /* | |
223 | * FIXME | |
224 | * | |
225 | * 32-bit access only | |
226 | */ | |
659d4954 | 227 | if (len >= 4 && !((unsigned long)buf & 0x03)) { |
e8d548d5 KM |
228 | iowrite32_rep(addr, buf, len / 4); |
229 | len %= 4; | |
230 | buf += total_len - len; | |
231 | } | |
232 | ||
233 | /* the rest operation */ | |
234 | for (i = 0; i < len; i++) | |
235 | iowrite8(buf[i], addr + (0x03 - (i & 0x03))); | |
236 | ||
659d4954 KM |
237 | /* |
238 | * variable update | |
239 | */ | |
240 | pkt->actual += total_len; | |
241 | ||
242 | if (pkt->actual < pkt->length) | |
243 | is_done = 0; /* there are remainder data */ | |
244 | else if (is_short) | |
245 | is_done = 1; /* short packet */ | |
246 | else | |
247 | is_done = !pkt->zero; /* send zero packet ? */ | |
248 | ||
249 | /* | |
250 | * pipe/irq handling | |
251 | */ | |
252 | if (is_short) | |
e8d548d5 KM |
253 | usbhsf_send_terminator(pipe); |
254 | ||
659d4954 | 255 | usbhsf_tx_irq_ctrl(pipe, !is_done); |
4bd04811 KM |
256 | usbhs_pipe_enable(pipe); |
257 | ||
659d4954 KM |
258 | dev_dbg(dev, " send %d (%d/ %d/ %d/ %d)\n", |
259 | usbhs_pipe_number(pipe), | |
260 | pkt->length, pkt->actual, is_done, pkt->zero); | |
261 | ||
262 | /* | |
263 | * Transmission end | |
264 | */ | |
265 | if (is_done) { | |
266 | if (usbhs_pipe_is_dcp(pipe)) | |
267 | usbhs_dcp_control_transfer_done(pipe); | |
268 | ||
dad67397 | 269 | info->done(pkt); |
4bd04811 KM |
270 | } |
271 | ||
272 | return 0; | |
659d4954 KM |
273 | |
274 | usbhs_fifo_write_busy: | |
275 | /* | |
276 | * pipe is busy. | |
277 | * retry in interrupt | |
278 | */ | |
279 | usbhsf_tx_irq_ctrl(pipe, 1); | |
280 | ||
281 | return ret; | |
e8d548d5 KM |
282 | } |
283 | ||
dad67397 KM |
284 | struct usbhs_pkt_handle usbhs_fifo_push_handler = { |
285 | .prepare = usbhsf_try_push, | |
286 | .try_run = usbhsf_try_push, | |
287 | }; | |
288 | ||
289 | static int usbhsf_prepare_pop(struct usbhs_pkt *pkt) | |
e8d548d5 | 290 | { |
dad67397 | 291 | struct usbhs_pipe *pipe = pkt->pipe; |
e8d548d5 KM |
292 | int ret; |
293 | ||
294 | /* | |
295 | * select pipe and enable it to prepare packet receive | |
296 | */ | |
297 | ret = usbhsf_fifo_select(pipe, 0); | |
298 | if (ret < 0) | |
299 | return ret; | |
300 | ||
301 | usbhs_pipe_enable(pipe); | |
659d4954 | 302 | usbhsf_rx_irq_ctrl(pipe, 1); |
e8d548d5 KM |
303 | |
304 | return ret; | |
305 | } | |
306 | ||
dad67397 | 307 | static int usbhsf_try_pop(struct usbhs_pkt *pkt) |
e8d548d5 | 308 | { |
4bd04811 | 309 | struct usbhs_pipe *pipe = pkt->pipe; |
e8d548d5 | 310 | struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe); |
659d4954 | 311 | struct device *dev = usbhs_priv_to_dev(priv); |
e8d548d5 | 312 | void __iomem *addr = priv->base + CFIFO; |
659d4954 KM |
313 | u8 *buf; |
314 | u32 data = 0; | |
315 | int maxp = usbhs_pipe_get_maxpacket(pipe); | |
4bd04811 | 316 | int rcv_len, len; |
e8d548d5 | 317 | int i, ret; |
4bd04811 | 318 | int total_len = 0; |
659d4954 | 319 | int is_done = 0; |
e8d548d5 KM |
320 | |
321 | ret = usbhsf_fifo_select(pipe, 0); | |
322 | if (ret < 0) | |
323 | return ret; | |
324 | ||
325 | ret = usbhsf_fifo_barrier(priv); | |
326 | if (ret < 0) | |
327 | return ret; | |
328 | ||
329 | rcv_len = usbhsf_fifo_rcv_len(priv); | |
330 | ||
659d4954 KM |
331 | buf = pkt->buf + pkt->actual; |
332 | len = pkt->length - pkt->actual; | |
333 | len = min(len, rcv_len); | |
334 | total_len = len; | |
335 | ||
e8d548d5 KM |
336 | /* |
337 | * Buffer clear if Zero-Length packet | |
338 | * | |
339 | * see | |
340 | * "Operation" - "FIFO Buffer Memory" - "FIFO Port Function" | |
341 | */ | |
342 | if (0 == rcv_len) { | |
343 | usbhsf_fifo_clear(pipe); | |
4bd04811 | 344 | goto usbhs_fifo_read_end; |
e8d548d5 KM |
345 | } |
346 | ||
e8d548d5 KM |
347 | /* |
348 | * FIXME | |
349 | * | |
350 | * 32-bit access only | |
351 | */ | |
659d4954 | 352 | if (len >= 4 && !((unsigned long)buf & 0x03)) { |
e8d548d5 KM |
353 | ioread32_rep(addr, buf, len / 4); |
354 | len %= 4; | |
659d4954 | 355 | buf += total_len - len; |
e8d548d5 KM |
356 | } |
357 | ||
358 | /* the rest operation */ | |
359 | for (i = 0; i < len; i++) { | |
360 | if (!(i & 0x03)) | |
361 | data = ioread32(addr); | |
362 | ||
363 | buf[i] = (data >> ((i & 0x03) * 8)) & 0xff; | |
364 | } | |
365 | ||
659d4954 KM |
366 | pkt->actual += total_len; |
367 | ||
4bd04811 | 368 | usbhs_fifo_read_end: |
659d4954 KM |
369 | if ((pkt->actual == pkt->length) || /* receive all data */ |
370 | (total_len < maxp)) /* short packet */ | |
371 | is_done = 1; | |
372 | ||
373 | dev_dbg(dev, " recv %d (%d/ %d/ %d/ %d)\n", | |
374 | usbhs_pipe_number(pipe), | |
375 | pkt->length, pkt->actual, is_done, pkt->zero); | |
376 | ||
377 | if (is_done) { | |
378 | struct usbhs_pipe_info *info = usbhs_priv_to_pipeinfo(priv); | |
379 | ||
380 | usbhsf_rx_irq_ctrl(pipe, 0); | |
381 | usbhs_pipe_disable(pipe); | |
382 | ||
dad67397 | 383 | info->done(pkt); |
4bd04811 KM |
384 | } |
385 | ||
386 | return 0; | |
e8d548d5 | 387 | } |
dad67397 KM |
388 | |
389 | struct usbhs_pkt_handle usbhs_fifo_pop_handler = { | |
390 | .prepare = usbhsf_prepare_pop, | |
391 | .try_run = usbhsf_try_pop, | |
392 | }; | |
393 | ||
394 | /* | |
395 | * handler function | |
396 | */ | |
397 | static int usbhsf_ctrl_stage_end(struct usbhs_pkt *pkt) | |
398 | { | |
399 | struct usbhs_pipe *pipe = pkt->pipe; | |
400 | struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe); | |
401 | struct usbhs_pipe_info *info = usbhs_priv_to_pipeinfo(priv); | |
402 | ||
403 | usbhs_dcp_control_transfer_done(pipe); | |
404 | ||
405 | info->done(pkt); | |
406 | ||
407 | return 0; | |
408 | } | |
409 | ||
410 | struct usbhs_pkt_handle usbhs_ctrl_stage_end_handler = { | |
411 | .prepare = usbhsf_ctrl_stage_end, | |
412 | .try_run = usbhsf_ctrl_stage_end, | |
413 | }; | |
414 | ||
415 | /* | |
416 | * irq functions | |
417 | */ | |
418 | static int usbhsf_irq_empty(struct usbhs_priv *priv, | |
419 | struct usbhs_irq_state *irq_state) | |
420 | { | |
421 | struct usbhs_pipe *pipe; | |
422 | struct usbhs_pkt *pkt; | |
423 | struct device *dev = usbhs_priv_to_dev(priv); | |
424 | int i, ret; | |
425 | ||
426 | if (!irq_state->bempsts) { | |
427 | dev_err(dev, "debug %s !!\n", __func__); | |
428 | return -EIO; | |
429 | } | |
430 | ||
431 | dev_dbg(dev, "irq empty [0x%04x]\n", irq_state->bempsts); | |
432 | ||
433 | /* | |
434 | * search interrupted "pipe" | |
435 | * not "uep". | |
436 | */ | |
437 | usbhs_for_each_pipe_with_dcp(pipe, priv, i) { | |
438 | if (!(irq_state->bempsts & (1 << i))) | |
439 | continue; | |
440 | ||
441 | pkt = usbhs_pkt_get(pipe); | |
442 | ret = usbhs_pkt_run(pkt); | |
443 | if (ret < 0) | |
444 | dev_err(dev, "irq_empty run_error %d : %d\n", i, ret); | |
445 | } | |
446 | ||
447 | return 0; | |
448 | } | |
449 | ||
450 | static int usbhsf_irq_ready(struct usbhs_priv *priv, | |
451 | struct usbhs_irq_state *irq_state) | |
452 | { | |
453 | struct usbhs_pipe *pipe; | |
454 | struct usbhs_pkt *pkt; | |
455 | struct device *dev = usbhs_priv_to_dev(priv); | |
456 | int i, ret; | |
457 | ||
458 | if (!irq_state->brdysts) { | |
459 | dev_err(dev, "debug %s !!\n", __func__); | |
460 | return -EIO; | |
461 | } | |
462 | ||
463 | dev_dbg(dev, "irq ready [0x%04x]\n", irq_state->brdysts); | |
464 | ||
465 | /* | |
466 | * search interrupted "pipe" | |
467 | * not "uep". | |
468 | */ | |
469 | usbhs_for_each_pipe_with_dcp(pipe, priv, i) { | |
470 | if (!(irq_state->brdysts & (1 << i))) | |
471 | continue; | |
472 | ||
473 | pkt = usbhs_pkt_get(pipe); | |
474 | ret = usbhs_pkt_run(pkt); | |
475 | if (ret < 0) | |
476 | dev_err(dev, "irq_ready run_error %d : %d\n", i, ret); | |
477 | } | |
478 | ||
479 | return 0; | |
480 | } | |
481 | ||
482 | /* | |
483 | * fifo init | |
484 | */ | |
485 | void usbhs_fifo_init(struct usbhs_priv *priv) | |
486 | { | |
487 | struct usbhs_mod *mod = usbhs_mod_get_current(priv); | |
488 | ||
489 | mod->irq_empty = usbhsf_irq_empty; | |
490 | mod->irq_ready = usbhsf_irq_ready; | |
491 | mod->irq_bempsts = 0; | |
492 | mod->irq_brdysts = 0; | |
493 | } | |
494 | ||
495 | void usbhs_fifo_quit(struct usbhs_priv *priv) | |
496 | { | |
497 | struct usbhs_mod *mod = usbhs_mod_get_current(priv); | |
498 | ||
499 | mod->irq_empty = NULL; | |
500 | mod->irq_ready = NULL; | |
501 | mod->irq_bempsts = 0; | |
502 | mod->irq_brdysts = 0; | |
503 | } |