]>
Commit | Line | Data |
---|---|---|
89e59053 SK |
1 | // SPDX-License-Identifier: (GPL-2.0 OR BSD-3-Clause) |
2 | // Copyright(c) 2015-18 Intel Corporation. | |
3 | ||
4 | /* | |
5 | * stream.c - SoundWire Bus stream operations. | |
6 | */ | |
7 | ||
8 | #include <linux/delay.h> | |
9 | #include <linux/device.h> | |
10 | #include <linux/init.h> | |
11 | #include <linux/module.h> | |
12 | #include <linux/mod_devicetable.h> | |
13 | #include <linux/slab.h> | |
f8101c74 | 14 | #include <linux/soundwire/sdw_registers.h> |
89e59053 SK |
15 | #include <linux/soundwire/sdw.h> |
16 | #include "bus.h" | |
17 | ||
f8101c74 SK |
18 | static int _sdw_program_slave_port_params(struct sdw_bus *bus, |
19 | struct sdw_slave *slave, | |
20 | struct sdw_transport_params *t_params, | |
21 | enum sdw_dpn_type type) | |
22 | { | |
23 | u32 addr1, addr2, addr3, addr4; | |
24 | int ret; | |
25 | u16 wbuf; | |
26 | ||
27 | if (bus->params.next_bank) { | |
28 | addr1 = SDW_DPN_OFFSETCTRL2_B1(t_params->port_num); | |
29 | addr2 = SDW_DPN_BLOCKCTRL3_B1(t_params->port_num); | |
30 | addr3 = SDW_DPN_SAMPLECTRL2_B1(t_params->port_num); | |
31 | addr4 = SDW_DPN_HCTRL_B1(t_params->port_num); | |
32 | } else { | |
33 | addr1 = SDW_DPN_OFFSETCTRL2_B0(t_params->port_num); | |
34 | addr2 = SDW_DPN_BLOCKCTRL3_B0(t_params->port_num); | |
35 | addr3 = SDW_DPN_SAMPLECTRL2_B0(t_params->port_num); | |
36 | addr4 = SDW_DPN_HCTRL_B0(t_params->port_num); | |
37 | } | |
38 | ||
39 | /* Program DPN_OffsetCtrl2 registers */ | |
40 | ret = sdw_write(slave, addr1, t_params->offset2); | |
41 | if (ret < 0) { | |
42 | dev_err(bus->dev, "DPN_OffsetCtrl2 register write failed"); | |
43 | return ret; | |
44 | } | |
45 | ||
46 | /* Program DPN_BlockCtrl3 register */ | |
47 | ret = sdw_write(slave, addr2, t_params->blk_pkg_mode); | |
48 | if (ret < 0) { | |
49 | dev_err(bus->dev, "DPN_BlockCtrl3 register write failed"); | |
50 | return ret; | |
51 | } | |
52 | ||
53 | /* | |
54 | * Data ports are FULL, SIMPLE and REDUCED. This function handles | |
55 | * FULL and REDUCED only and and beyond this point only FULL is | |
56 | * handled, so bail out if we are not FULL data port type | |
57 | */ | |
58 | if (type != SDW_DPN_FULL) | |
59 | return ret; | |
60 | ||
61 | /* Program DPN_SampleCtrl2 register */ | |
62 | wbuf = (t_params->sample_interval - 1); | |
63 | wbuf &= SDW_DPN_SAMPLECTRL_HIGH; | |
64 | wbuf >>= SDW_REG_SHIFT(SDW_DPN_SAMPLECTRL_HIGH); | |
65 | ||
66 | ret = sdw_write(slave, addr3, wbuf); | |
67 | if (ret < 0) { | |
68 | dev_err(bus->dev, "DPN_SampleCtrl2 register write failed"); | |
69 | return ret; | |
70 | } | |
71 | ||
72 | /* Program DPN_HCtrl register */ | |
73 | wbuf = t_params->hstart; | |
74 | wbuf <<= SDW_REG_SHIFT(SDW_DPN_HCTRL_HSTART); | |
75 | wbuf |= t_params->hstop; | |
76 | ||
77 | ret = sdw_write(slave, addr4, wbuf); | |
78 | if (ret < 0) | |
79 | dev_err(bus->dev, "DPN_HCtrl register write failed"); | |
80 | ||
81 | return ret; | |
82 | } | |
83 | ||
84 | static int sdw_program_slave_port_params(struct sdw_bus *bus, | |
85 | struct sdw_slave_runtime *s_rt, | |
86 | struct sdw_port_runtime *p_rt) | |
87 | { | |
88 | struct sdw_transport_params *t_params = &p_rt->transport_params; | |
89 | struct sdw_port_params *p_params = &p_rt->port_params; | |
90 | struct sdw_slave_prop *slave_prop = &s_rt->slave->prop; | |
91 | u32 addr1, addr2, addr3, addr4, addr5, addr6; | |
92 | struct sdw_dpn_prop *dpn_prop; | |
93 | int ret; | |
94 | u8 wbuf; | |
95 | ||
96 | dpn_prop = sdw_get_slave_dpn_prop(s_rt->slave, | |
97 | s_rt->direction, | |
98 | t_params->port_num); | |
99 | if (!dpn_prop) | |
100 | return -EINVAL; | |
101 | ||
102 | addr1 = SDW_DPN_PORTCTRL(t_params->port_num); | |
103 | addr2 = SDW_DPN_BLOCKCTRL1(t_params->port_num); | |
104 | ||
105 | if (bus->params.next_bank) { | |
106 | addr3 = SDW_DPN_SAMPLECTRL1_B1(t_params->port_num); | |
107 | addr4 = SDW_DPN_OFFSETCTRL1_B1(t_params->port_num); | |
108 | addr5 = SDW_DPN_BLOCKCTRL2_B1(t_params->port_num); | |
109 | addr6 = SDW_DPN_LANECTRL_B1(t_params->port_num); | |
110 | ||
111 | } else { | |
112 | addr3 = SDW_DPN_SAMPLECTRL1_B0(t_params->port_num); | |
113 | addr4 = SDW_DPN_OFFSETCTRL1_B0(t_params->port_num); | |
114 | addr5 = SDW_DPN_BLOCKCTRL2_B0(t_params->port_num); | |
115 | addr6 = SDW_DPN_LANECTRL_B0(t_params->port_num); | |
116 | } | |
117 | ||
118 | /* Program DPN_PortCtrl register */ | |
119 | wbuf = p_params->data_mode << SDW_REG_SHIFT(SDW_DPN_PORTCTRL_DATAMODE); | |
120 | wbuf |= p_params->flow_mode; | |
121 | ||
122 | ret = sdw_update(s_rt->slave, addr1, 0xF, wbuf); | |
123 | if (ret < 0) { | |
124 | dev_err(&s_rt->slave->dev, | |
125 | "DPN_PortCtrl register write failed for port %d", | |
126 | t_params->port_num); | |
127 | return ret; | |
128 | } | |
129 | ||
130 | /* Program DPN_BlockCtrl1 register */ | |
131 | ret = sdw_write(s_rt->slave, addr2, (p_params->bps - 1)); | |
132 | if (ret < 0) { | |
133 | dev_err(&s_rt->slave->dev, | |
134 | "DPN_BlockCtrl1 register write failed for port %d", | |
135 | t_params->port_num); | |
136 | return ret; | |
137 | } | |
138 | ||
139 | /* Program DPN_SampleCtrl1 register */ | |
140 | wbuf = (t_params->sample_interval - 1) & SDW_DPN_SAMPLECTRL_LOW; | |
141 | ret = sdw_write(s_rt->slave, addr3, wbuf); | |
142 | if (ret < 0) { | |
143 | dev_err(&s_rt->slave->dev, | |
144 | "DPN_SampleCtrl1 register write failed for port %d", | |
145 | t_params->port_num); | |
146 | return ret; | |
147 | } | |
148 | ||
149 | /* Program DPN_OffsetCtrl1 registers */ | |
150 | ret = sdw_write(s_rt->slave, addr4, t_params->offset1); | |
151 | if (ret < 0) { | |
152 | dev_err(&s_rt->slave->dev, | |
153 | "DPN_OffsetCtrl1 register write failed for port %d", | |
154 | t_params->port_num); | |
155 | return ret; | |
156 | } | |
157 | ||
158 | /* Program DPN_BlockCtrl2 register*/ | |
159 | if (t_params->blk_grp_ctrl_valid) { | |
160 | ret = sdw_write(s_rt->slave, addr5, t_params->blk_grp_ctrl); | |
161 | if (ret < 0) { | |
162 | dev_err(&s_rt->slave->dev, | |
163 | "DPN_BlockCtrl2 reg write failed for port %d", | |
164 | t_params->port_num); | |
165 | return ret; | |
166 | } | |
167 | } | |
168 | ||
169 | /* program DPN_LaneCtrl register */ | |
170 | if (slave_prop->lane_control_support) { | |
171 | ret = sdw_write(s_rt->slave, addr6, t_params->lane_ctrl); | |
172 | if (ret < 0) { | |
173 | dev_err(&s_rt->slave->dev, | |
174 | "DPN_LaneCtrl register write failed for port %d", | |
175 | t_params->port_num); | |
176 | return ret; | |
177 | } | |
178 | } | |
179 | ||
180 | if (dpn_prop->type != SDW_DPN_SIMPLE) { | |
181 | ret = _sdw_program_slave_port_params(bus, s_rt->slave, | |
182 | t_params, dpn_prop->type); | |
183 | if (ret < 0) | |
184 | dev_err(&s_rt->slave->dev, | |
185 | "Transport reg write failed for port: %d", | |
186 | t_params->port_num); | |
187 | } | |
188 | ||
189 | return ret; | |
190 | } | |
191 | ||
192 | static int sdw_program_master_port_params(struct sdw_bus *bus, | |
193 | struct sdw_port_runtime *p_rt) | |
194 | { | |
195 | int ret; | |
196 | ||
197 | /* | |
198 | * we need to set transport and port parameters for the port. | |
199 | * Transport parameters refers to the smaple interval, offsets and | |
200 | * hstart/stop etc of the data. Port parameters refers to word | |
201 | * length, flow mode etc of the port | |
202 | */ | |
203 | ret = bus->port_ops->dpn_set_port_transport_params(bus, | |
204 | &p_rt->transport_params, | |
205 | bus->params.next_bank); | |
206 | if (ret < 0) | |
207 | return ret; | |
208 | ||
209 | return bus->port_ops->dpn_set_port_params(bus, | |
210 | &p_rt->port_params, | |
211 | bus->params.next_bank); | |
212 | } | |
213 | ||
214 | /** | |
215 | * sdw_program_port_params() - Programs transport parameters of Master(s) | |
216 | * and Slave(s) | |
217 | * | |
218 | * @m_rt: Master stream runtime | |
219 | */ | |
220 | static int sdw_program_port_params(struct sdw_master_runtime *m_rt) | |
221 | { | |
222 | struct sdw_slave_runtime *s_rt = NULL; | |
223 | struct sdw_bus *bus = m_rt->bus; | |
224 | struct sdw_port_runtime *p_rt; | |
225 | int ret = 0; | |
226 | ||
227 | /* Program transport & port parameters for Slave(s) */ | |
228 | list_for_each_entry(s_rt, &m_rt->slave_rt_list, m_rt_node) { | |
229 | list_for_each_entry(p_rt, &s_rt->port_list, port_node) { | |
230 | ret = sdw_program_slave_port_params(bus, s_rt, p_rt); | |
231 | if (ret < 0) | |
232 | return ret; | |
233 | } | |
234 | } | |
235 | ||
236 | /* Program transport & port parameters for Master(s) */ | |
237 | list_for_each_entry(p_rt, &m_rt->port_list, port_node) { | |
238 | ret = sdw_program_master_port_params(bus, p_rt); | |
239 | if (ret < 0) | |
240 | return ret; | |
241 | } | |
242 | ||
243 | return 0; | |
244 | } | |
245 | ||
79df15b7 SK |
246 | /** |
247 | * sdw_enable_disable_slave_ports: Enable/disable slave data port | |
248 | * | |
249 | * @bus: bus instance | |
250 | * @s_rt: slave runtime | |
251 | * @p_rt: port runtime | |
252 | * @en: enable or disable operation | |
253 | * | |
254 | * This function only sets the enable/disable bits in the relevant bank, the | |
255 | * actual enable/disable is done with a bank switch | |
256 | */ | |
257 | static int sdw_enable_disable_slave_ports(struct sdw_bus *bus, | |
258 | struct sdw_slave_runtime *s_rt, | |
259 | struct sdw_port_runtime *p_rt, bool en) | |
260 | { | |
261 | struct sdw_transport_params *t_params = &p_rt->transport_params; | |
262 | u32 addr; | |
263 | int ret; | |
264 | ||
265 | if (bus->params.next_bank) | |
266 | addr = SDW_DPN_CHANNELEN_B1(p_rt->num); | |
267 | else | |
268 | addr = SDW_DPN_CHANNELEN_B0(p_rt->num); | |
269 | ||
270 | /* | |
271 | * Since bus doesn't support sharing a port across two streams, | |
272 | * it is safe to reset this register | |
273 | */ | |
274 | if (en) | |
275 | ret = sdw_update(s_rt->slave, addr, 0xFF, p_rt->ch_mask); | |
276 | else | |
277 | ret = sdw_update(s_rt->slave, addr, 0xFF, 0x0); | |
278 | ||
279 | if (ret < 0) | |
280 | dev_err(&s_rt->slave->dev, | |
281 | "Slave chn_en reg write failed:%d port:%d", | |
282 | ret, t_params->port_num); | |
283 | ||
284 | return ret; | |
285 | } | |
286 | ||
287 | static int sdw_enable_disable_master_ports(struct sdw_master_runtime *m_rt, | |
288 | struct sdw_port_runtime *p_rt, bool en) | |
289 | { | |
290 | struct sdw_transport_params *t_params = &p_rt->transport_params; | |
291 | struct sdw_bus *bus = m_rt->bus; | |
292 | struct sdw_enable_ch enable_ch; | |
293 | int ret = 0; | |
294 | ||
295 | enable_ch.port_num = p_rt->num; | |
296 | enable_ch.ch_mask = p_rt->ch_mask; | |
297 | enable_ch.enable = en; | |
298 | ||
299 | /* Perform Master port channel(s) enable/disable */ | |
300 | if (bus->port_ops->dpn_port_enable_ch) { | |
301 | ret = bus->port_ops->dpn_port_enable_ch(bus, | |
302 | &enable_ch, bus->params.next_bank); | |
303 | if (ret < 0) { | |
304 | dev_err(bus->dev, | |
305 | "Master chn_en write failed:%d port:%d", | |
306 | ret, t_params->port_num); | |
307 | return ret; | |
308 | } | |
309 | } else { | |
310 | dev_err(bus->dev, | |
311 | "dpn_port_enable_ch not supported, %s failed\n", | |
312 | en ? "enable" : "disable"); | |
313 | return -EINVAL; | |
314 | } | |
315 | ||
316 | return 0; | |
317 | } | |
318 | ||
319 | /** | |
320 | * sdw_enable_disable_ports() - Enable/disable port(s) for Master and | |
321 | * Slave(s) | |
322 | * | |
323 | * @m_rt: Master stream runtime | |
324 | * @en: mode (enable/disable) | |
325 | */ | |
326 | static int sdw_enable_disable_ports(struct sdw_master_runtime *m_rt, bool en) | |
327 | { | |
328 | struct sdw_port_runtime *s_port, *m_port; | |
329 | struct sdw_slave_runtime *s_rt = NULL; | |
330 | int ret = 0; | |
331 | ||
332 | /* Enable/Disable Slave port(s) */ | |
333 | list_for_each_entry(s_rt, &m_rt->slave_rt_list, m_rt_node) { | |
334 | list_for_each_entry(s_port, &s_rt->port_list, port_node) { | |
335 | ret = sdw_enable_disable_slave_ports(m_rt->bus, s_rt, | |
336 | s_port, en); | |
337 | if (ret < 0) | |
338 | return ret; | |
339 | } | |
340 | } | |
341 | ||
342 | /* Enable/Disable Master port(s) */ | |
343 | list_for_each_entry(m_port, &m_rt->port_list, port_node) { | |
344 | ret = sdw_enable_disable_master_ports(m_rt, m_port, en); | |
345 | if (ret < 0) | |
346 | return ret; | |
347 | } | |
348 | ||
349 | return 0; | |
350 | } | |
351 | ||
352 | static int sdw_do_port_prep(struct sdw_slave_runtime *s_rt, | |
353 | struct sdw_prepare_ch prep_ch, enum sdw_port_prep_ops cmd) | |
354 | { | |
355 | const struct sdw_slave_ops *ops = s_rt->slave->ops; | |
356 | int ret; | |
357 | ||
358 | if (ops->port_prep) { | |
359 | ret = ops->port_prep(s_rt->slave, &prep_ch, cmd); | |
360 | if (ret < 0) { | |
361 | dev_err(&s_rt->slave->dev, | |
362 | "Slave Port Prep cmd %d failed: %d", cmd, ret); | |
363 | return ret; | |
364 | } | |
365 | } | |
366 | ||
367 | return 0; | |
368 | } | |
369 | ||
370 | static int sdw_prep_deprep_slave_ports(struct sdw_bus *bus, | |
371 | struct sdw_slave_runtime *s_rt, | |
372 | struct sdw_port_runtime *p_rt, bool prep) | |
373 | { | |
374 | struct completion *port_ready = NULL; | |
375 | struct sdw_dpn_prop *dpn_prop; | |
376 | struct sdw_prepare_ch prep_ch; | |
377 | unsigned int time_left; | |
378 | bool intr = false; | |
379 | int ret = 0, val; | |
380 | u32 addr; | |
381 | ||
382 | prep_ch.num = p_rt->num; | |
383 | prep_ch.ch_mask = p_rt->ch_mask; | |
384 | ||
385 | dpn_prop = sdw_get_slave_dpn_prop(s_rt->slave, | |
386 | s_rt->direction, | |
387 | prep_ch.num); | |
388 | if (!dpn_prop) { | |
389 | dev_err(bus->dev, | |
390 | "Slave Port:%d properties not found", prep_ch.num); | |
391 | return -EINVAL; | |
392 | } | |
393 | ||
394 | prep_ch.prepare = prep; | |
395 | ||
396 | prep_ch.bank = bus->params.next_bank; | |
397 | ||
398 | if (dpn_prop->device_interrupts || !dpn_prop->simple_ch_prep_sm) | |
399 | intr = true; | |
400 | ||
401 | /* | |
402 | * Enable interrupt before Port prepare. | |
403 | * For Port de-prepare, it is assumed that port | |
404 | * was prepared earlier | |
405 | */ | |
406 | if (prep && intr) { | |
407 | ret = sdw_configure_dpn_intr(s_rt->slave, p_rt->num, prep, | |
408 | dpn_prop->device_interrupts); | |
409 | if (ret < 0) | |
410 | return ret; | |
411 | } | |
412 | ||
413 | /* Inform slave about the impending port prepare */ | |
414 | sdw_do_port_prep(s_rt, prep_ch, SDW_OPS_PORT_PRE_PREP); | |
415 | ||
416 | /* Prepare Slave port implementing CP_SM */ | |
417 | if (!dpn_prop->simple_ch_prep_sm) { | |
418 | addr = SDW_DPN_PREPARECTRL(p_rt->num); | |
419 | ||
420 | if (prep) | |
421 | ret = sdw_update(s_rt->slave, addr, | |
422 | 0xFF, p_rt->ch_mask); | |
423 | else | |
424 | ret = sdw_update(s_rt->slave, addr, 0xFF, 0x0); | |
425 | ||
426 | if (ret < 0) { | |
427 | dev_err(&s_rt->slave->dev, | |
428 | "Slave prep_ctrl reg write failed"); | |
429 | return ret; | |
430 | } | |
431 | ||
432 | /* Wait for completion on port ready */ | |
433 | port_ready = &s_rt->slave->port_ready[prep_ch.num]; | |
434 | time_left = wait_for_completion_timeout(port_ready, | |
435 | msecs_to_jiffies(dpn_prop->ch_prep_timeout)); | |
436 | ||
437 | val = sdw_read(s_rt->slave, SDW_DPN_PREPARESTATUS(p_rt->num)); | |
438 | val &= p_rt->ch_mask; | |
439 | if (!time_left || val) { | |
440 | dev_err(&s_rt->slave->dev, | |
441 | "Chn prep failed for port:%d", prep_ch.num); | |
442 | return -ETIMEDOUT; | |
443 | } | |
444 | } | |
445 | ||
446 | /* Inform slaves about ports prepared */ | |
447 | sdw_do_port_prep(s_rt, prep_ch, SDW_OPS_PORT_POST_PREP); | |
448 | ||
449 | /* Disable interrupt after Port de-prepare */ | |
450 | if (!prep && intr) | |
451 | ret = sdw_configure_dpn_intr(s_rt->slave, p_rt->num, prep, | |
452 | dpn_prop->device_interrupts); | |
453 | ||
454 | return ret; | |
455 | } | |
456 | ||
457 | static int sdw_prep_deprep_master_ports(struct sdw_master_runtime *m_rt, | |
458 | struct sdw_port_runtime *p_rt, bool prep) | |
459 | { | |
460 | struct sdw_transport_params *t_params = &p_rt->transport_params; | |
461 | struct sdw_bus *bus = m_rt->bus; | |
462 | const struct sdw_master_port_ops *ops = bus->port_ops; | |
463 | struct sdw_prepare_ch prep_ch; | |
464 | int ret = 0; | |
465 | ||
466 | prep_ch.num = p_rt->num; | |
467 | prep_ch.ch_mask = p_rt->ch_mask; | |
468 | prep_ch.prepare = prep; /* Prepare/De-prepare */ | |
469 | prep_ch.bank = bus->params.next_bank; | |
470 | ||
471 | /* Pre-prepare/Pre-deprepare port(s) */ | |
472 | if (ops->dpn_port_prep) { | |
473 | ret = ops->dpn_port_prep(bus, &prep_ch); | |
474 | if (ret < 0) { | |
475 | dev_err(bus->dev, "Port prepare failed for port:%d", | |
476 | t_params->port_num); | |
477 | return ret; | |
478 | } | |
479 | } | |
480 | ||
481 | return ret; | |
482 | } | |
483 | ||
484 | /** | |
485 | * sdw_prep_deprep_ports() - Prepare/De-prepare port(s) for Master(s) and | |
486 | * Slave(s) | |
487 | * | |
488 | * @m_rt: Master runtime handle | |
489 | * @prep: Prepare or De-prepare | |
490 | */ | |
491 | static int sdw_prep_deprep_ports(struct sdw_master_runtime *m_rt, bool prep) | |
492 | { | |
493 | struct sdw_slave_runtime *s_rt = NULL; | |
494 | struct sdw_port_runtime *p_rt; | |
495 | int ret = 0; | |
496 | ||
497 | /* Prepare/De-prepare Slave port(s) */ | |
498 | list_for_each_entry(s_rt, &m_rt->slave_rt_list, m_rt_node) { | |
499 | list_for_each_entry(p_rt, &s_rt->port_list, port_node) { | |
500 | ret = sdw_prep_deprep_slave_ports(m_rt->bus, s_rt, | |
501 | p_rt, prep); | |
502 | if (ret < 0) | |
503 | return ret; | |
504 | } | |
505 | } | |
506 | ||
507 | /* Prepare/De-prepare Master port(s) */ | |
508 | list_for_each_entry(p_rt, &m_rt->port_list, port_node) { | |
509 | ret = sdw_prep_deprep_master_ports(m_rt, p_rt, prep); | |
510 | if (ret < 0) | |
511 | return ret; | |
512 | } | |
513 | ||
514 | return ret; | |
515 | } | |
516 | ||
89e59053 SK |
517 | /** |
518 | * sdw_release_stream() - Free the assigned stream runtime | |
519 | * | |
520 | * @stream: SoundWire stream runtime | |
521 | * | |
522 | * sdw_release_stream should be called only once per stream | |
523 | */ | |
524 | void sdw_release_stream(struct sdw_stream_runtime *stream) | |
525 | { | |
526 | kfree(stream); | |
527 | } | |
528 | EXPORT_SYMBOL(sdw_release_stream); | |
529 | ||
530 | /** | |
531 | * sdw_alloc_stream() - Allocate and return stream runtime | |
532 | * | |
533 | * @stream_name: SoundWire stream name | |
534 | * | |
535 | * Allocates a SoundWire stream runtime instance. | |
536 | * sdw_alloc_stream should be called only once per stream. Typically | |
537 | * invoked from ALSA/ASoC machine/platform driver. | |
538 | */ | |
539 | struct sdw_stream_runtime *sdw_alloc_stream(char *stream_name) | |
540 | { | |
541 | struct sdw_stream_runtime *stream; | |
542 | ||
543 | stream = kzalloc(sizeof(*stream), GFP_KERNEL); | |
544 | if (!stream) | |
545 | return NULL; | |
546 | ||
547 | stream->name = stream_name; | |
548 | stream->state = SDW_STREAM_ALLOCATED; | |
549 | ||
550 | return stream; | |
551 | } | |
552 | EXPORT_SYMBOL(sdw_alloc_stream); | |
553 | ||
554 | /** | |
555 | * sdw_alloc_master_rt() - Allocates and initialize Master runtime handle | |
556 | * | |
557 | * @bus: SDW bus instance | |
558 | * @stream_config: Stream configuration | |
559 | * @stream: Stream runtime handle. | |
560 | * | |
561 | * This function is to be called with bus_lock held. | |
562 | */ | |
563 | static struct sdw_master_runtime | |
564 | *sdw_alloc_master_rt(struct sdw_bus *bus, | |
565 | struct sdw_stream_config *stream_config, | |
566 | struct sdw_stream_runtime *stream) | |
567 | { | |
568 | struct sdw_master_runtime *m_rt; | |
569 | ||
570 | m_rt = stream->m_rt; | |
571 | ||
572 | /* | |
573 | * check if Master is already allocated (as a result of Slave adding | |
574 | * it first), if so skip allocation and go to configure | |
575 | */ | |
576 | if (m_rt) | |
577 | goto stream_config; | |
578 | ||
579 | m_rt = kzalloc(sizeof(*m_rt), GFP_KERNEL); | |
580 | if (!m_rt) | |
581 | return NULL; | |
582 | ||
583 | /* Initialization of Master runtime handle */ | |
bbe7379d | 584 | INIT_LIST_HEAD(&m_rt->port_list); |
89e59053 SK |
585 | INIT_LIST_HEAD(&m_rt->slave_rt_list); |
586 | stream->m_rt = m_rt; | |
587 | ||
588 | list_add_tail(&m_rt->bus_node, &bus->m_rt_list); | |
589 | ||
590 | stream_config: | |
591 | m_rt->ch_count = stream_config->ch_count; | |
592 | m_rt->bus = bus; | |
593 | m_rt->stream = stream; | |
594 | m_rt->direction = stream_config->direction; | |
595 | ||
596 | return m_rt; | |
597 | } | |
598 | ||
599 | /** | |
600 | * sdw_alloc_slave_rt() - Allocate and initialize Slave runtime handle. | |
601 | * | |
602 | * @slave: Slave handle | |
603 | * @stream_config: Stream configuration | |
604 | * @stream: Stream runtime handle | |
605 | * | |
606 | * This function is to be called with bus_lock held. | |
607 | */ | |
608 | static struct sdw_slave_runtime | |
609 | *sdw_alloc_slave_rt(struct sdw_slave *slave, | |
610 | struct sdw_stream_config *stream_config, | |
611 | struct sdw_stream_runtime *stream) | |
612 | { | |
613 | struct sdw_slave_runtime *s_rt = NULL; | |
614 | ||
615 | s_rt = kzalloc(sizeof(*s_rt), GFP_KERNEL); | |
616 | if (!s_rt) | |
617 | return NULL; | |
618 | ||
bbe7379d | 619 | INIT_LIST_HEAD(&s_rt->port_list); |
89e59053 SK |
620 | s_rt->ch_count = stream_config->ch_count; |
621 | s_rt->direction = stream_config->direction; | |
622 | s_rt->slave = slave; | |
623 | ||
624 | return s_rt; | |
625 | } | |
626 | ||
bbe7379d SK |
627 | static void sdw_master_port_release(struct sdw_bus *bus, |
628 | struct sdw_master_runtime *m_rt) | |
629 | { | |
630 | struct sdw_port_runtime *p_rt, *_p_rt; | |
631 | ||
632 | list_for_each_entry_safe(p_rt, _p_rt, | |
633 | &m_rt->port_list, port_node) { | |
634 | list_del(&p_rt->port_node); | |
635 | kfree(p_rt); | |
636 | } | |
637 | } | |
638 | ||
639 | static void sdw_slave_port_release(struct sdw_bus *bus, | |
640 | struct sdw_slave *slave, | |
641 | struct sdw_stream_runtime *stream) | |
642 | { | |
643 | struct sdw_port_runtime *p_rt, *_p_rt; | |
644 | struct sdw_master_runtime *m_rt = stream->m_rt; | |
645 | struct sdw_slave_runtime *s_rt; | |
646 | ||
647 | list_for_each_entry(s_rt, &m_rt->slave_rt_list, m_rt_node) { | |
648 | if (s_rt->slave != slave) | |
649 | continue; | |
650 | ||
651 | list_for_each_entry_safe(p_rt, _p_rt, | |
652 | &s_rt->port_list, port_node) { | |
653 | list_del(&p_rt->port_node); | |
654 | kfree(p_rt); | |
655 | } | |
656 | } | |
657 | } | |
658 | ||
89e59053 SK |
659 | /** |
660 | * sdw_release_slave_stream() - Free Slave(s) runtime handle | |
661 | * | |
662 | * @slave: Slave handle. | |
663 | * @stream: Stream runtime handle. | |
664 | * | |
665 | * This function is to be called with bus_lock held. | |
666 | */ | |
667 | static void sdw_release_slave_stream(struct sdw_slave *slave, | |
668 | struct sdw_stream_runtime *stream) | |
669 | { | |
670 | struct sdw_slave_runtime *s_rt, *_s_rt; | |
671 | struct sdw_master_runtime *m_rt = stream->m_rt; | |
672 | ||
673 | /* Retrieve Slave runtime handle */ | |
674 | list_for_each_entry_safe(s_rt, _s_rt, | |
675 | &m_rt->slave_rt_list, m_rt_node) { | |
676 | ||
677 | if (s_rt->slave == slave) { | |
678 | list_del(&s_rt->m_rt_node); | |
679 | kfree(s_rt); | |
680 | return; | |
681 | } | |
682 | } | |
683 | } | |
684 | ||
685 | /** | |
686 | * sdw_release_master_stream() - Free Master runtime handle | |
687 | * | |
688 | * @stream: Stream runtime handle. | |
689 | * | |
690 | * This function is to be called with bus_lock held | |
691 | * It frees the Master runtime handle and associated Slave(s) runtime | |
692 | * handle. If this is called first then sdw_release_slave_stream() will have | |
693 | * no effect as Slave(s) runtime handle would already be freed up. | |
694 | */ | |
695 | static void sdw_release_master_stream(struct sdw_stream_runtime *stream) | |
696 | { | |
697 | struct sdw_master_runtime *m_rt = stream->m_rt; | |
698 | struct sdw_slave_runtime *s_rt, *_s_rt; | |
699 | ||
700 | list_for_each_entry_safe(s_rt, _s_rt, | |
701 | &m_rt->slave_rt_list, m_rt_node) | |
702 | sdw_stream_remove_slave(s_rt->slave, stream); | |
703 | ||
704 | list_del(&m_rt->bus_node); | |
705 | } | |
706 | ||
707 | /** | |
708 | * sdw_stream_remove_master() - Remove master from sdw_stream | |
709 | * | |
710 | * @bus: SDW Bus instance | |
711 | * @stream: SoundWire stream | |
712 | * | |
bbe7379d | 713 | * This removes and frees port_rt and master_rt from a stream |
89e59053 SK |
714 | */ |
715 | int sdw_stream_remove_master(struct sdw_bus *bus, | |
716 | struct sdw_stream_runtime *stream) | |
717 | { | |
718 | mutex_lock(&bus->bus_lock); | |
719 | ||
720 | sdw_release_master_stream(stream); | |
bbe7379d | 721 | sdw_master_port_release(bus, stream->m_rt); |
89e59053 SK |
722 | stream->state = SDW_STREAM_RELEASED; |
723 | kfree(stream->m_rt); | |
724 | stream->m_rt = NULL; | |
725 | ||
726 | mutex_unlock(&bus->bus_lock); | |
727 | ||
728 | return 0; | |
729 | } | |
730 | EXPORT_SYMBOL(sdw_stream_remove_master); | |
731 | ||
732 | /** | |
733 | * sdw_stream_remove_slave() - Remove slave from sdw_stream | |
734 | * | |
735 | * @slave: SDW Slave instance | |
736 | * @stream: SoundWire stream | |
737 | * | |
bbe7379d | 738 | * This removes and frees port_rt and slave_rt from a stream |
89e59053 SK |
739 | */ |
740 | int sdw_stream_remove_slave(struct sdw_slave *slave, | |
741 | struct sdw_stream_runtime *stream) | |
742 | { | |
743 | mutex_lock(&slave->bus->bus_lock); | |
744 | ||
bbe7379d | 745 | sdw_slave_port_release(slave->bus, slave, stream); |
89e59053 SK |
746 | sdw_release_slave_stream(slave, stream); |
747 | ||
748 | mutex_unlock(&slave->bus->bus_lock); | |
749 | ||
750 | return 0; | |
751 | } | |
752 | EXPORT_SYMBOL(sdw_stream_remove_slave); | |
753 | ||
754 | /** | |
755 | * sdw_config_stream() - Configure the allocated stream | |
756 | * | |
757 | * @dev: SDW device | |
758 | * @stream: SoundWire stream | |
759 | * @stream_config: Stream configuration for audio stream | |
760 | * @is_slave: is API called from Slave or Master | |
761 | * | |
762 | * This function is to be called with bus_lock held. | |
763 | */ | |
764 | static int sdw_config_stream(struct device *dev, | |
765 | struct sdw_stream_runtime *stream, | |
766 | struct sdw_stream_config *stream_config, bool is_slave) | |
767 | { | |
768 | /* | |
769 | * Update the stream rate, channel and bps based on data | |
770 | * source. For more than one data source (multilink), | |
771 | * match the rate, bps, stream type and increment number of channels. | |
772 | * | |
773 | * If rate/bps is zero, it means the values are not set, so skip | |
774 | * comparison and allow the value to be set and stored in stream | |
775 | */ | |
776 | if (stream->params.rate && | |
777 | stream->params.rate != stream_config->frame_rate) { | |
778 | dev_err(dev, "rate not matching, stream:%s", stream->name); | |
779 | return -EINVAL; | |
780 | } | |
781 | ||
782 | if (stream->params.bps && | |
783 | stream->params.bps != stream_config->bps) { | |
784 | dev_err(dev, "bps not matching, stream:%s", stream->name); | |
785 | return -EINVAL; | |
786 | } | |
787 | ||
788 | stream->type = stream_config->type; | |
789 | stream->params.rate = stream_config->frame_rate; | |
790 | stream->params.bps = stream_config->bps; | |
791 | ||
792 | /* TODO: Update this check during Device-device support */ | |
793 | if (is_slave) | |
794 | stream->params.ch_count += stream_config->ch_count; | |
795 | ||
796 | return 0; | |
797 | } | |
798 | ||
bbe7379d SK |
799 | static int sdw_is_valid_port_range(struct device *dev, |
800 | struct sdw_port_runtime *p_rt) | |
801 | { | |
802 | if (!SDW_VALID_PORT_RANGE(p_rt->num)) { | |
803 | dev_err(dev, | |
804 | "SoundWire: Invalid port number :%d", p_rt->num); | |
805 | return -EINVAL; | |
806 | } | |
807 | ||
808 | return 0; | |
809 | } | |
810 | ||
811 | static struct sdw_port_runtime *sdw_port_alloc(struct device *dev, | |
812 | struct sdw_port_config *port_config, | |
813 | int port_index) | |
814 | { | |
815 | struct sdw_port_runtime *p_rt; | |
816 | ||
817 | p_rt = kzalloc(sizeof(*p_rt), GFP_KERNEL); | |
818 | if (!p_rt) | |
819 | return NULL; | |
820 | ||
821 | p_rt->ch_mask = port_config[port_index].ch_mask; | |
822 | p_rt->num = port_config[port_index].num; | |
823 | ||
824 | return p_rt; | |
825 | } | |
826 | ||
827 | static int sdw_master_port_config(struct sdw_bus *bus, | |
828 | struct sdw_master_runtime *m_rt, | |
829 | struct sdw_port_config *port_config, | |
830 | unsigned int num_ports) | |
831 | { | |
832 | struct sdw_port_runtime *p_rt; | |
833 | int i; | |
834 | ||
835 | /* Iterate for number of ports to perform initialization */ | |
836 | for (i = 0; i < num_ports; i++) { | |
837 | p_rt = sdw_port_alloc(bus->dev, port_config, i); | |
838 | if (!p_rt) | |
839 | return -ENOMEM; | |
840 | ||
841 | /* | |
842 | * TODO: Check port capabilities for requested | |
843 | * configuration (audio mode support) | |
844 | */ | |
845 | ||
846 | list_add_tail(&p_rt->port_node, &m_rt->port_list); | |
847 | } | |
848 | ||
849 | return 0; | |
850 | } | |
851 | ||
852 | static int sdw_slave_port_config(struct sdw_slave *slave, | |
853 | struct sdw_slave_runtime *s_rt, | |
854 | struct sdw_port_config *port_config, | |
855 | unsigned int num_config) | |
856 | { | |
857 | struct sdw_port_runtime *p_rt; | |
858 | int i, ret; | |
859 | ||
860 | /* Iterate for number of ports to perform initialization */ | |
861 | for (i = 0; i < num_config; i++) { | |
862 | p_rt = sdw_port_alloc(&slave->dev, port_config, i); | |
863 | if (!p_rt) | |
864 | return -ENOMEM; | |
865 | ||
866 | /* | |
867 | * TODO: Check valid port range as defined by DisCo/ | |
868 | * slave | |
869 | */ | |
870 | ret = sdw_is_valid_port_range(&slave->dev, p_rt); | |
871 | if (ret < 0) { | |
872 | kfree(p_rt); | |
873 | return ret; | |
874 | } | |
875 | ||
876 | /* | |
877 | * TODO: Check port capabilities for requested | |
878 | * configuration (audio mode support) | |
879 | */ | |
880 | ||
881 | list_add_tail(&p_rt->port_node, &s_rt->port_list); | |
882 | } | |
883 | ||
884 | return 0; | |
885 | } | |
886 | ||
89e59053 SK |
887 | /** |
888 | * sdw_stream_add_master() - Allocate and add master runtime to a stream | |
889 | * | |
890 | * @bus: SDW Bus instance | |
891 | * @stream_config: Stream configuration for audio stream | |
bbe7379d SK |
892 | * @port_config: Port configuration for audio stream |
893 | * @num_ports: Number of ports | |
89e59053 SK |
894 | * @stream: SoundWire stream |
895 | */ | |
896 | int sdw_stream_add_master(struct sdw_bus *bus, | |
897 | struct sdw_stream_config *stream_config, | |
bbe7379d SK |
898 | struct sdw_port_config *port_config, |
899 | unsigned int num_ports, | |
89e59053 SK |
900 | struct sdw_stream_runtime *stream) |
901 | { | |
902 | struct sdw_master_runtime *m_rt = NULL; | |
903 | int ret; | |
904 | ||
905 | mutex_lock(&bus->bus_lock); | |
906 | ||
907 | m_rt = sdw_alloc_master_rt(bus, stream_config, stream); | |
908 | if (!m_rt) { | |
909 | dev_err(bus->dev, | |
910 | "Master runtime config failed for stream:%s", | |
911 | stream->name); | |
912 | ret = -ENOMEM; | |
913 | goto error; | |
914 | } | |
915 | ||
916 | ret = sdw_config_stream(bus->dev, stream, stream_config, false); | |
917 | if (ret) | |
918 | goto stream_error; | |
919 | ||
bbe7379d SK |
920 | ret = sdw_master_port_config(bus, m_rt, port_config, num_ports); |
921 | if (ret) | |
922 | goto stream_error; | |
923 | ||
89e59053 SK |
924 | stream->state = SDW_STREAM_CONFIGURED; |
925 | ||
926 | stream_error: | |
927 | sdw_release_master_stream(stream); | |
928 | error: | |
929 | mutex_unlock(&bus->bus_lock); | |
930 | return ret; | |
931 | } | |
932 | EXPORT_SYMBOL(sdw_stream_add_master); | |
933 | ||
934 | /** | |
935 | * sdw_stream_add_slave() - Allocate and add master/slave runtime to a stream | |
936 | * | |
937 | * @slave: SDW Slave instance | |
938 | * @stream_config: Stream configuration for audio stream | |
939 | * @stream: SoundWire stream | |
bbe7379d SK |
940 | * @port_config: Port configuration for audio stream |
941 | * @num_ports: Number of ports | |
89e59053 SK |
942 | */ |
943 | int sdw_stream_add_slave(struct sdw_slave *slave, | |
944 | struct sdw_stream_config *stream_config, | |
bbe7379d SK |
945 | struct sdw_port_config *port_config, |
946 | unsigned int num_ports, | |
89e59053 SK |
947 | struct sdw_stream_runtime *stream) |
948 | { | |
949 | struct sdw_slave_runtime *s_rt; | |
950 | struct sdw_master_runtime *m_rt; | |
951 | int ret; | |
952 | ||
953 | mutex_lock(&slave->bus->bus_lock); | |
954 | ||
955 | /* | |
956 | * If this API is invoked by Slave first then m_rt is not valid. | |
957 | * So, allocate m_rt and add Slave to it. | |
958 | */ | |
959 | m_rt = sdw_alloc_master_rt(slave->bus, stream_config, stream); | |
960 | if (!m_rt) { | |
961 | dev_err(&slave->dev, | |
962 | "alloc master runtime failed for stream:%s", | |
963 | stream->name); | |
964 | ret = -ENOMEM; | |
965 | goto error; | |
966 | } | |
967 | ||
968 | s_rt = sdw_alloc_slave_rt(slave, stream_config, stream); | |
969 | if (!s_rt) { | |
970 | dev_err(&slave->dev, | |
971 | "Slave runtime config failed for stream:%s", | |
972 | stream->name); | |
973 | ret = -ENOMEM; | |
974 | goto stream_error; | |
975 | } | |
976 | ||
977 | ret = sdw_config_stream(&slave->dev, stream, stream_config, true); | |
978 | if (ret) | |
979 | goto stream_error; | |
980 | ||
981 | list_add_tail(&s_rt->m_rt_node, &m_rt->slave_rt_list); | |
982 | ||
bbe7379d SK |
983 | ret = sdw_slave_port_config(slave, s_rt, port_config, num_ports); |
984 | if (ret) | |
985 | goto stream_error; | |
986 | ||
89e59053 SK |
987 | stream->state = SDW_STREAM_CONFIGURED; |
988 | goto error; | |
989 | ||
990 | stream_error: | |
991 | /* | |
992 | * we hit error so cleanup the stream, release all Slave(s) and | |
993 | * Master runtime | |
994 | */ | |
995 | sdw_release_master_stream(stream); | |
996 | error: | |
997 | mutex_unlock(&slave->bus->bus_lock); | |
998 | return ret; | |
999 | } | |
1000 | EXPORT_SYMBOL(sdw_stream_add_slave); | |
f8101c74 SK |
1001 | |
1002 | /** | |
1003 | * sdw_get_slave_dpn_prop() - Get Slave port capabilities | |
1004 | * | |
1005 | * @slave: Slave handle | |
1006 | * @direction: Data direction. | |
1007 | * @port_num: Port number | |
1008 | */ | |
1009 | struct sdw_dpn_prop *sdw_get_slave_dpn_prop(struct sdw_slave *slave, | |
1010 | enum sdw_data_direction direction, | |
1011 | unsigned int port_num) | |
1012 | { | |
1013 | struct sdw_dpn_prop *dpn_prop; | |
1014 | u8 num_ports; | |
1015 | int i; | |
1016 | ||
1017 | if (direction == SDW_DATA_DIR_TX) { | |
1018 | num_ports = hweight32(slave->prop.source_ports); | |
1019 | dpn_prop = slave->prop.src_dpn_prop; | |
1020 | } else { | |
1021 | num_ports = hweight32(slave->prop.sink_ports); | |
1022 | dpn_prop = slave->prop.sink_dpn_prop; | |
1023 | } | |
1024 | ||
1025 | for (i = 0; i < num_ports; i++) { | |
1026 | dpn_prop = &dpn_prop[i]; | |
1027 | ||
1028 | if (dpn_prop->num == port_num) | |
1029 | return &dpn_prop[i]; | |
1030 | } | |
1031 | ||
1032 | return NULL; | |
1033 | } |