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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 | 15 | #include <linux/soundwire/sdw.h> |
4550569b | 16 | #include <sound/soc.h> |
89e59053 SK |
17 | #include "bus.h" |
18 | ||
99b8a5d6 SK |
19 | /* |
20 | * Array of supported rows and columns as per MIPI SoundWire Specification 1.1 | |
21 | * | |
22 | * The rows are arranged as per the array index value programmed | |
23 | * in register. The index 15 has dummy value 0 in order to fill hole. | |
24 | */ | |
fe4b70f2 | 25 | int sdw_rows[SDW_FRAME_ROWS] = {48, 50, 60, 64, 75, 80, 125, 147, |
99b8a5d6 SK |
26 | 96, 100, 120, 128, 150, 160, 250, 0, |
27 | 192, 200, 240, 256, 72, 144, 90, 180}; | |
28 | ||
fe4b70f2 | 29 | int sdw_cols[SDW_FRAME_COLS] = {2, 4, 6, 8, 10, 12, 14, 16}; |
99b8a5d6 | 30 | |
fe4b70f2 | 31 | int sdw_find_col_index(int col) |
99b8a5d6 SK |
32 | { |
33 | int i; | |
34 | ||
35 | for (i = 0; i < SDW_FRAME_COLS; i++) { | |
fe4b70f2 | 36 | if (sdw_cols[i] == col) |
99b8a5d6 SK |
37 | return i; |
38 | } | |
39 | ||
40 | pr_warn("Requested column not found, selecting lowest column no: 2\n"); | |
41 | return 0; | |
42 | } | |
fe4b70f2 | 43 | EXPORT_SYMBOL(sdw_find_col_index); |
99b8a5d6 | 44 | |
fe4b70f2 | 45 | int sdw_find_row_index(int row) |
99b8a5d6 SK |
46 | { |
47 | int i; | |
48 | ||
49 | for (i = 0; i < SDW_FRAME_ROWS; i++) { | |
fe4b70f2 | 50 | if (sdw_rows[i] == row) |
99b8a5d6 SK |
51 | return i; |
52 | } | |
53 | ||
54 | pr_warn("Requested row not found, selecting lowest row no: 48\n"); | |
55 | return 0; | |
56 | } | |
fe4b70f2 | 57 | EXPORT_SYMBOL(sdw_find_row_index); |
897fe40e | 58 | |
f8101c74 | 59 | static int _sdw_program_slave_port_params(struct sdw_bus *bus, |
1fe74a5e PLB |
60 | struct sdw_slave *slave, |
61 | struct sdw_transport_params *t_params, | |
62 | enum sdw_dpn_type type) | |
f8101c74 SK |
63 | { |
64 | u32 addr1, addr2, addr3, addr4; | |
65 | int ret; | |
66 | u16 wbuf; | |
67 | ||
68 | if (bus->params.next_bank) { | |
69 | addr1 = SDW_DPN_OFFSETCTRL2_B1(t_params->port_num); | |
70 | addr2 = SDW_DPN_BLOCKCTRL3_B1(t_params->port_num); | |
71 | addr3 = SDW_DPN_SAMPLECTRL2_B1(t_params->port_num); | |
72 | addr4 = SDW_DPN_HCTRL_B1(t_params->port_num); | |
73 | } else { | |
74 | addr1 = SDW_DPN_OFFSETCTRL2_B0(t_params->port_num); | |
75 | addr2 = SDW_DPN_BLOCKCTRL3_B0(t_params->port_num); | |
76 | addr3 = SDW_DPN_SAMPLECTRL2_B0(t_params->port_num); | |
77 | addr4 = SDW_DPN_HCTRL_B0(t_params->port_num); | |
78 | } | |
79 | ||
80 | /* Program DPN_OffsetCtrl2 registers */ | |
81 | ret = sdw_write(slave, addr1, t_params->offset2); | |
82 | if (ret < 0) { | |
17ed5bef | 83 | dev_err(bus->dev, "DPN_OffsetCtrl2 register write failed\n"); |
f8101c74 SK |
84 | return ret; |
85 | } | |
86 | ||
87 | /* Program DPN_BlockCtrl3 register */ | |
88 | ret = sdw_write(slave, addr2, t_params->blk_pkg_mode); | |
89 | if (ret < 0) { | |
17ed5bef | 90 | dev_err(bus->dev, "DPN_BlockCtrl3 register write failed\n"); |
f8101c74 SK |
91 | return ret; |
92 | } | |
93 | ||
94 | /* | |
95 | * Data ports are FULL, SIMPLE and REDUCED. This function handles | |
7d3b3cdf | 96 | * FULL and REDUCED only and beyond this point only FULL is |
f8101c74 SK |
97 | * handled, so bail out if we are not FULL data port type |
98 | */ | |
99 | if (type != SDW_DPN_FULL) | |
100 | return ret; | |
101 | ||
102 | /* Program DPN_SampleCtrl2 register */ | |
41ff9174 | 103 | wbuf = FIELD_GET(SDW_DPN_SAMPLECTRL_HIGH, t_params->sample_interval - 1); |
f8101c74 SK |
104 | |
105 | ret = sdw_write(slave, addr3, wbuf); | |
106 | if (ret < 0) { | |
17ed5bef | 107 | dev_err(bus->dev, "DPN_SampleCtrl2 register write failed\n"); |
f8101c74 SK |
108 | return ret; |
109 | } | |
110 | ||
111 | /* Program DPN_HCtrl register */ | |
41ff9174 VK |
112 | wbuf = FIELD_PREP(SDW_DPN_HCTRL_HSTART, t_params->hstart); |
113 | wbuf |= FIELD_PREP(SDW_DPN_HCTRL_HSTOP, t_params->hstop); | |
f8101c74 SK |
114 | |
115 | ret = sdw_write(slave, addr4, wbuf); | |
116 | if (ret < 0) | |
17ed5bef | 117 | dev_err(bus->dev, "DPN_HCtrl register write failed\n"); |
f8101c74 SK |
118 | |
119 | return ret; | |
120 | } | |
121 | ||
122 | static int sdw_program_slave_port_params(struct sdw_bus *bus, | |
1fe74a5e PLB |
123 | struct sdw_slave_runtime *s_rt, |
124 | struct sdw_port_runtime *p_rt) | |
f8101c74 SK |
125 | { |
126 | struct sdw_transport_params *t_params = &p_rt->transport_params; | |
127 | struct sdw_port_params *p_params = &p_rt->port_params; | |
128 | struct sdw_slave_prop *slave_prop = &s_rt->slave->prop; | |
129 | u32 addr1, addr2, addr3, addr4, addr5, addr6; | |
130 | struct sdw_dpn_prop *dpn_prop; | |
131 | int ret; | |
132 | u8 wbuf; | |
133 | ||
134 | dpn_prop = sdw_get_slave_dpn_prop(s_rt->slave, | |
1fe74a5e PLB |
135 | s_rt->direction, |
136 | t_params->port_num); | |
f8101c74 SK |
137 | if (!dpn_prop) |
138 | return -EINVAL; | |
139 | ||
140 | addr1 = SDW_DPN_PORTCTRL(t_params->port_num); | |
141 | addr2 = SDW_DPN_BLOCKCTRL1(t_params->port_num); | |
142 | ||
143 | if (bus->params.next_bank) { | |
144 | addr3 = SDW_DPN_SAMPLECTRL1_B1(t_params->port_num); | |
145 | addr4 = SDW_DPN_OFFSETCTRL1_B1(t_params->port_num); | |
146 | addr5 = SDW_DPN_BLOCKCTRL2_B1(t_params->port_num); | |
147 | addr6 = SDW_DPN_LANECTRL_B1(t_params->port_num); | |
148 | ||
149 | } else { | |
150 | addr3 = SDW_DPN_SAMPLECTRL1_B0(t_params->port_num); | |
151 | addr4 = SDW_DPN_OFFSETCTRL1_B0(t_params->port_num); | |
152 | addr5 = SDW_DPN_BLOCKCTRL2_B0(t_params->port_num); | |
153 | addr6 = SDW_DPN_LANECTRL_B0(t_params->port_num); | |
154 | } | |
155 | ||
156 | /* Program DPN_PortCtrl register */ | |
41ff9174 VK |
157 | wbuf = FIELD_PREP(SDW_DPN_PORTCTRL_DATAMODE, p_params->data_mode); |
158 | wbuf |= FIELD_PREP(SDW_DPN_PORTCTRL_FLOWMODE, p_params->flow_mode); | |
f8101c74 SK |
159 | |
160 | ret = sdw_update(s_rt->slave, addr1, 0xF, wbuf); | |
161 | if (ret < 0) { | |
162 | dev_err(&s_rt->slave->dev, | |
17ed5bef | 163 | "DPN_PortCtrl register write failed for port %d\n", |
f8101c74 SK |
164 | t_params->port_num); |
165 | return ret; | |
166 | } | |
167 | ||
a9107de4 SK |
168 | if (!dpn_prop->read_only_wordlength) { |
169 | /* Program DPN_BlockCtrl1 register */ | |
170 | ret = sdw_write(s_rt->slave, addr2, (p_params->bps - 1)); | |
171 | if (ret < 0) { | |
172 | dev_err(&s_rt->slave->dev, | |
173 | "DPN_BlockCtrl1 register write failed for port %d\n", | |
174 | t_params->port_num); | |
175 | return ret; | |
176 | } | |
f8101c74 SK |
177 | } |
178 | ||
179 | /* Program DPN_SampleCtrl1 register */ | |
180 | wbuf = (t_params->sample_interval - 1) & SDW_DPN_SAMPLECTRL_LOW; | |
181 | ret = sdw_write(s_rt->slave, addr3, wbuf); | |
182 | if (ret < 0) { | |
183 | dev_err(&s_rt->slave->dev, | |
17ed5bef | 184 | "DPN_SampleCtrl1 register write failed for port %d\n", |
f8101c74 SK |
185 | t_params->port_num); |
186 | return ret; | |
187 | } | |
188 | ||
189 | /* Program DPN_OffsetCtrl1 registers */ | |
190 | ret = sdw_write(s_rt->slave, addr4, t_params->offset1); | |
191 | if (ret < 0) { | |
192 | dev_err(&s_rt->slave->dev, | |
17ed5bef | 193 | "DPN_OffsetCtrl1 register write failed for port %d\n", |
f8101c74 SK |
194 | t_params->port_num); |
195 | return ret; | |
196 | } | |
197 | ||
198 | /* Program DPN_BlockCtrl2 register*/ | |
199 | if (t_params->blk_grp_ctrl_valid) { | |
200 | ret = sdw_write(s_rt->slave, addr5, t_params->blk_grp_ctrl); | |
201 | if (ret < 0) { | |
202 | dev_err(&s_rt->slave->dev, | |
17ed5bef | 203 | "DPN_BlockCtrl2 reg write failed for port %d\n", |
f8101c74 SK |
204 | t_params->port_num); |
205 | return ret; | |
206 | } | |
207 | } | |
208 | ||
209 | /* program DPN_LaneCtrl register */ | |
210 | if (slave_prop->lane_control_support) { | |
211 | ret = sdw_write(s_rt->slave, addr6, t_params->lane_ctrl); | |
212 | if (ret < 0) { | |
213 | dev_err(&s_rt->slave->dev, | |
17ed5bef | 214 | "DPN_LaneCtrl register write failed for port %d\n", |
f8101c74 SK |
215 | t_params->port_num); |
216 | return ret; | |
217 | } | |
218 | } | |
219 | ||
220 | if (dpn_prop->type != SDW_DPN_SIMPLE) { | |
221 | ret = _sdw_program_slave_port_params(bus, s_rt->slave, | |
1fe74a5e | 222 | t_params, dpn_prop->type); |
f8101c74 SK |
223 | if (ret < 0) |
224 | dev_err(&s_rt->slave->dev, | |
17ed5bef | 225 | "Transport reg write failed for port: %d\n", |
f8101c74 SK |
226 | t_params->port_num); |
227 | } | |
228 | ||
229 | return ret; | |
230 | } | |
231 | ||
232 | static int sdw_program_master_port_params(struct sdw_bus *bus, | |
1fe74a5e | 233 | struct sdw_port_runtime *p_rt) |
f8101c74 SK |
234 | { |
235 | int ret; | |
236 | ||
237 | /* | |
238 | * we need to set transport and port parameters for the port. | |
7d3b3cdf | 239 | * Transport parameters refers to the sample interval, offsets and |
f8101c74 SK |
240 | * hstart/stop etc of the data. Port parameters refers to word |
241 | * length, flow mode etc of the port | |
242 | */ | |
243 | ret = bus->port_ops->dpn_set_port_transport_params(bus, | |
244 | &p_rt->transport_params, | |
245 | bus->params.next_bank); | |
246 | if (ret < 0) | |
247 | return ret; | |
248 | ||
249 | return bus->port_ops->dpn_set_port_params(bus, | |
1fe74a5e PLB |
250 | &p_rt->port_params, |
251 | bus->params.next_bank); | |
f8101c74 SK |
252 | } |
253 | ||
254 | /** | |
255 | * sdw_program_port_params() - Programs transport parameters of Master(s) | |
256 | * and Slave(s) | |
257 | * | |
258 | * @m_rt: Master stream runtime | |
259 | */ | |
260 | static int sdw_program_port_params(struct sdw_master_runtime *m_rt) | |
261 | { | |
262 | struct sdw_slave_runtime *s_rt = NULL; | |
263 | struct sdw_bus *bus = m_rt->bus; | |
264 | struct sdw_port_runtime *p_rt; | |
265 | int ret = 0; | |
266 | ||
267 | /* Program transport & port parameters for Slave(s) */ | |
268 | list_for_each_entry(s_rt, &m_rt->slave_rt_list, m_rt_node) { | |
269 | list_for_each_entry(p_rt, &s_rt->port_list, port_node) { | |
270 | ret = sdw_program_slave_port_params(bus, s_rt, p_rt); | |
271 | if (ret < 0) | |
272 | return ret; | |
273 | } | |
274 | } | |
275 | ||
276 | /* Program transport & port parameters for Master(s) */ | |
277 | list_for_each_entry(p_rt, &m_rt->port_list, port_node) { | |
278 | ret = sdw_program_master_port_params(bus, p_rt); | |
279 | if (ret < 0) | |
280 | return ret; | |
281 | } | |
282 | ||
283 | return 0; | |
284 | } | |
285 | ||
79df15b7 SK |
286 | /** |
287 | * sdw_enable_disable_slave_ports: Enable/disable slave data port | |
288 | * | |
289 | * @bus: bus instance | |
290 | * @s_rt: slave runtime | |
291 | * @p_rt: port runtime | |
292 | * @en: enable or disable operation | |
293 | * | |
294 | * This function only sets the enable/disable bits in the relevant bank, the | |
295 | * actual enable/disable is done with a bank switch | |
296 | */ | |
297 | static int sdw_enable_disable_slave_ports(struct sdw_bus *bus, | |
1fe74a5e PLB |
298 | struct sdw_slave_runtime *s_rt, |
299 | struct sdw_port_runtime *p_rt, | |
300 | bool en) | |
79df15b7 SK |
301 | { |
302 | struct sdw_transport_params *t_params = &p_rt->transport_params; | |
303 | u32 addr; | |
304 | int ret; | |
305 | ||
306 | if (bus->params.next_bank) | |
307 | addr = SDW_DPN_CHANNELEN_B1(p_rt->num); | |
308 | else | |
309 | addr = SDW_DPN_CHANNELEN_B0(p_rt->num); | |
310 | ||
311 | /* | |
312 | * Since bus doesn't support sharing a port across two streams, | |
313 | * it is safe to reset this register | |
314 | */ | |
315 | if (en) | |
0b43fef9 | 316 | ret = sdw_write(s_rt->slave, addr, p_rt->ch_mask); |
79df15b7 | 317 | else |
0b43fef9 | 318 | ret = sdw_write(s_rt->slave, addr, 0x0); |
79df15b7 SK |
319 | |
320 | if (ret < 0) | |
321 | dev_err(&s_rt->slave->dev, | |
17ed5bef | 322 | "Slave chn_en reg write failed:%d port:%d\n", |
79df15b7 SK |
323 | ret, t_params->port_num); |
324 | ||
325 | return ret; | |
326 | } | |
327 | ||
328 | static int sdw_enable_disable_master_ports(struct sdw_master_runtime *m_rt, | |
1fe74a5e PLB |
329 | struct sdw_port_runtime *p_rt, |
330 | bool en) | |
79df15b7 SK |
331 | { |
332 | struct sdw_transport_params *t_params = &p_rt->transport_params; | |
333 | struct sdw_bus *bus = m_rt->bus; | |
334 | struct sdw_enable_ch enable_ch; | |
a25eab29 | 335 | int ret; |
79df15b7 SK |
336 | |
337 | enable_ch.port_num = p_rt->num; | |
338 | enable_ch.ch_mask = p_rt->ch_mask; | |
339 | enable_ch.enable = en; | |
340 | ||
341 | /* Perform Master port channel(s) enable/disable */ | |
342 | if (bus->port_ops->dpn_port_enable_ch) { | |
343 | ret = bus->port_ops->dpn_port_enable_ch(bus, | |
1fe74a5e PLB |
344 | &enable_ch, |
345 | bus->params.next_bank); | |
79df15b7 SK |
346 | if (ret < 0) { |
347 | dev_err(bus->dev, | |
17ed5bef | 348 | "Master chn_en write failed:%d port:%d\n", |
79df15b7 SK |
349 | ret, t_params->port_num); |
350 | return ret; | |
351 | } | |
352 | } else { | |
353 | dev_err(bus->dev, | |
354 | "dpn_port_enable_ch not supported, %s failed\n", | |
355 | en ? "enable" : "disable"); | |
356 | return -EINVAL; | |
357 | } | |
358 | ||
359 | return 0; | |
360 | } | |
361 | ||
362 | /** | |
363 | * sdw_enable_disable_ports() - Enable/disable port(s) for Master and | |
364 | * Slave(s) | |
365 | * | |
366 | * @m_rt: Master stream runtime | |
367 | * @en: mode (enable/disable) | |
368 | */ | |
369 | static int sdw_enable_disable_ports(struct sdw_master_runtime *m_rt, bool en) | |
370 | { | |
371 | struct sdw_port_runtime *s_port, *m_port; | |
3a0be1a6 | 372 | struct sdw_slave_runtime *s_rt; |
79df15b7 SK |
373 | int ret = 0; |
374 | ||
375 | /* Enable/Disable Slave port(s) */ | |
376 | list_for_each_entry(s_rt, &m_rt->slave_rt_list, m_rt_node) { | |
377 | list_for_each_entry(s_port, &s_rt->port_list, port_node) { | |
378 | ret = sdw_enable_disable_slave_ports(m_rt->bus, s_rt, | |
1fe74a5e | 379 | s_port, en); |
79df15b7 SK |
380 | if (ret < 0) |
381 | return ret; | |
382 | } | |
383 | } | |
384 | ||
385 | /* Enable/Disable Master port(s) */ | |
386 | list_for_each_entry(m_port, &m_rt->port_list, port_node) { | |
387 | ret = sdw_enable_disable_master_ports(m_rt, m_port, en); | |
388 | if (ret < 0) | |
389 | return ret; | |
390 | } | |
391 | ||
392 | return 0; | |
393 | } | |
394 | ||
395 | static int sdw_do_port_prep(struct sdw_slave_runtime *s_rt, | |
1fe74a5e PLB |
396 | struct sdw_prepare_ch prep_ch, |
397 | enum sdw_port_prep_ops cmd) | |
79df15b7 SK |
398 | { |
399 | const struct sdw_slave_ops *ops = s_rt->slave->ops; | |
400 | int ret; | |
401 | ||
402 | if (ops->port_prep) { | |
403 | ret = ops->port_prep(s_rt->slave, &prep_ch, cmd); | |
404 | if (ret < 0) { | |
405 | dev_err(&s_rt->slave->dev, | |
62f0cec3 VK |
406 | "Slave Port Prep cmd %d failed: %d\n", |
407 | cmd, ret); | |
79df15b7 SK |
408 | return ret; |
409 | } | |
410 | } | |
411 | ||
412 | return 0; | |
413 | } | |
414 | ||
415 | static int sdw_prep_deprep_slave_ports(struct sdw_bus *bus, | |
1fe74a5e PLB |
416 | struct sdw_slave_runtime *s_rt, |
417 | struct sdw_port_runtime *p_rt, | |
418 | bool prep) | |
79df15b7 | 419 | { |
3a0be1a6 | 420 | struct completion *port_ready; |
79df15b7 SK |
421 | struct sdw_dpn_prop *dpn_prop; |
422 | struct sdw_prepare_ch prep_ch; | |
423 | unsigned int time_left; | |
424 | bool intr = false; | |
425 | int ret = 0, val; | |
426 | u32 addr; | |
427 | ||
428 | prep_ch.num = p_rt->num; | |
429 | prep_ch.ch_mask = p_rt->ch_mask; | |
430 | ||
431 | dpn_prop = sdw_get_slave_dpn_prop(s_rt->slave, | |
1fe74a5e PLB |
432 | s_rt->direction, |
433 | prep_ch.num); | |
79df15b7 SK |
434 | if (!dpn_prop) { |
435 | dev_err(bus->dev, | |
17ed5bef | 436 | "Slave Port:%d properties not found\n", prep_ch.num); |
79df15b7 SK |
437 | return -EINVAL; |
438 | } | |
439 | ||
440 | prep_ch.prepare = prep; | |
441 | ||
442 | prep_ch.bank = bus->params.next_bank; | |
443 | ||
8acbbfec | 444 | if (dpn_prop->imp_def_interrupts || !dpn_prop->simple_ch_prep_sm) |
79df15b7 SK |
445 | intr = true; |
446 | ||
447 | /* | |
448 | * Enable interrupt before Port prepare. | |
449 | * For Port de-prepare, it is assumed that port | |
450 | * was prepared earlier | |
451 | */ | |
452 | if (prep && intr) { | |
453 | ret = sdw_configure_dpn_intr(s_rt->slave, p_rt->num, prep, | |
8acbbfec | 454 | dpn_prop->imp_def_interrupts); |
79df15b7 SK |
455 | if (ret < 0) |
456 | return ret; | |
457 | } | |
458 | ||
459 | /* Inform slave about the impending port prepare */ | |
460 | sdw_do_port_prep(s_rt, prep_ch, SDW_OPS_PORT_PRE_PREP); | |
461 | ||
462 | /* Prepare Slave port implementing CP_SM */ | |
463 | if (!dpn_prop->simple_ch_prep_sm) { | |
464 | addr = SDW_DPN_PREPARECTRL(p_rt->num); | |
465 | ||
466 | if (prep) | |
0b43fef9 | 467 | ret = sdw_write(s_rt->slave, addr, p_rt->ch_mask); |
79df15b7 | 468 | else |
0b43fef9 | 469 | ret = sdw_write(s_rt->slave, addr, 0x0); |
79df15b7 SK |
470 | |
471 | if (ret < 0) { | |
472 | dev_err(&s_rt->slave->dev, | |
17ed5bef | 473 | "Slave prep_ctrl reg write failed\n"); |
79df15b7 SK |
474 | return ret; |
475 | } | |
476 | ||
477 | /* Wait for completion on port ready */ | |
478 | port_ready = &s_rt->slave->port_ready[prep_ch.num]; | |
479 | time_left = wait_for_completion_timeout(port_ready, | |
480 | msecs_to_jiffies(dpn_prop->ch_prep_timeout)); | |
481 | ||
482 | val = sdw_read(s_rt->slave, SDW_DPN_PREPARESTATUS(p_rt->num)); | |
483 | val &= p_rt->ch_mask; | |
484 | if (!time_left || val) { | |
485 | dev_err(&s_rt->slave->dev, | |
17ed5bef | 486 | "Chn prep failed for port:%d\n", prep_ch.num); |
79df15b7 SK |
487 | return -ETIMEDOUT; |
488 | } | |
489 | } | |
490 | ||
491 | /* Inform slaves about ports prepared */ | |
492 | sdw_do_port_prep(s_rt, prep_ch, SDW_OPS_PORT_POST_PREP); | |
493 | ||
494 | /* Disable interrupt after Port de-prepare */ | |
495 | if (!prep && intr) | |
496 | ret = sdw_configure_dpn_intr(s_rt->slave, p_rt->num, prep, | |
8acbbfec | 497 | dpn_prop->imp_def_interrupts); |
79df15b7 SK |
498 | |
499 | return ret; | |
500 | } | |
501 | ||
502 | static int sdw_prep_deprep_master_ports(struct sdw_master_runtime *m_rt, | |
1fe74a5e PLB |
503 | struct sdw_port_runtime *p_rt, |
504 | bool prep) | |
79df15b7 SK |
505 | { |
506 | struct sdw_transport_params *t_params = &p_rt->transport_params; | |
507 | struct sdw_bus *bus = m_rt->bus; | |
508 | const struct sdw_master_port_ops *ops = bus->port_ops; | |
509 | struct sdw_prepare_ch prep_ch; | |
510 | int ret = 0; | |
511 | ||
512 | prep_ch.num = p_rt->num; | |
513 | prep_ch.ch_mask = p_rt->ch_mask; | |
514 | prep_ch.prepare = prep; /* Prepare/De-prepare */ | |
515 | prep_ch.bank = bus->params.next_bank; | |
516 | ||
517 | /* Pre-prepare/Pre-deprepare port(s) */ | |
518 | if (ops->dpn_port_prep) { | |
519 | ret = ops->dpn_port_prep(bus, &prep_ch); | |
520 | if (ret < 0) { | |
17ed5bef | 521 | dev_err(bus->dev, "Port prepare failed for port:%d\n", |
1fe74a5e | 522 | t_params->port_num); |
79df15b7 SK |
523 | return ret; |
524 | } | |
525 | } | |
526 | ||
527 | return ret; | |
528 | } | |
529 | ||
530 | /** | |
531 | * sdw_prep_deprep_ports() - Prepare/De-prepare port(s) for Master(s) and | |
532 | * Slave(s) | |
533 | * | |
534 | * @m_rt: Master runtime handle | |
535 | * @prep: Prepare or De-prepare | |
536 | */ | |
537 | static int sdw_prep_deprep_ports(struct sdw_master_runtime *m_rt, bool prep) | |
538 | { | |
3a0be1a6 | 539 | struct sdw_slave_runtime *s_rt; |
79df15b7 SK |
540 | struct sdw_port_runtime *p_rt; |
541 | int ret = 0; | |
542 | ||
543 | /* Prepare/De-prepare Slave port(s) */ | |
544 | list_for_each_entry(s_rt, &m_rt->slave_rt_list, m_rt_node) { | |
545 | list_for_each_entry(p_rt, &s_rt->port_list, port_node) { | |
546 | ret = sdw_prep_deprep_slave_ports(m_rt->bus, s_rt, | |
1fe74a5e | 547 | p_rt, prep); |
79df15b7 SK |
548 | if (ret < 0) |
549 | return ret; | |
550 | } | |
551 | } | |
552 | ||
553 | /* Prepare/De-prepare Master port(s) */ | |
554 | list_for_each_entry(p_rt, &m_rt->port_list, port_node) { | |
555 | ret = sdw_prep_deprep_master_ports(m_rt, p_rt, prep); | |
556 | if (ret < 0) | |
557 | return ret; | |
558 | } | |
559 | ||
560 | return ret; | |
561 | } | |
562 | ||
99b8a5d6 SK |
563 | /** |
564 | * sdw_notify_config() - Notify bus configuration | |
565 | * | |
566 | * @m_rt: Master runtime handle | |
567 | * | |
568 | * This function notifies the Master(s) and Slave(s) of the | |
569 | * new bus configuration. | |
570 | */ | |
571 | static int sdw_notify_config(struct sdw_master_runtime *m_rt) | |
572 | { | |
573 | struct sdw_slave_runtime *s_rt; | |
574 | struct sdw_bus *bus = m_rt->bus; | |
575 | struct sdw_slave *slave; | |
576 | int ret = 0; | |
577 | ||
578 | if (bus->ops->set_bus_conf) { | |
579 | ret = bus->ops->set_bus_conf(bus, &bus->params); | |
580 | if (ret < 0) | |
581 | return ret; | |
582 | } | |
583 | ||
584 | list_for_each_entry(s_rt, &m_rt->slave_rt_list, m_rt_node) { | |
585 | slave = s_rt->slave; | |
586 | ||
587 | if (slave->ops->bus_config) { | |
588 | ret = slave->ops->bus_config(slave, &bus->params); | |
60835022 | 589 | if (ret < 0) { |
17ed5bef | 590 | dev_err(bus->dev, "Notify Slave: %d failed\n", |
1fe74a5e | 591 | slave->dev_num); |
60835022 RW |
592 | return ret; |
593 | } | |
99b8a5d6 SK |
594 | } |
595 | } | |
596 | ||
597 | return ret; | |
598 | } | |
599 | ||
600 | /** | |
601 | * sdw_program_params() - Program transport and port parameters for Master(s) | |
602 | * and Slave(s) | |
603 | * | |
604 | * @bus: SDW bus instance | |
bfaa3549 | 605 | * @prepare: true if sdw_program_params() is called by _prepare. |
99b8a5d6 | 606 | */ |
bfaa3549 | 607 | static int sdw_program_params(struct sdw_bus *bus, bool prepare) |
99b8a5d6 | 608 | { |
3a0be1a6 | 609 | struct sdw_master_runtime *m_rt; |
99b8a5d6 SK |
610 | int ret = 0; |
611 | ||
612 | list_for_each_entry(m_rt, &bus->m_rt_list, bus_node) { | |
bfaa3549 RW |
613 | |
614 | /* | |
615 | * this loop walks through all master runtimes for a | |
616 | * bus, but the ports can only be configured while | |
617 | * explicitly preparing a stream or handling an | |
618 | * already-prepared stream otherwise. | |
619 | */ | |
620 | if (!prepare && | |
621 | m_rt->stream->state == SDW_STREAM_CONFIGURED) | |
622 | continue; | |
623 | ||
99b8a5d6 SK |
624 | ret = sdw_program_port_params(m_rt); |
625 | if (ret < 0) { | |
626 | dev_err(bus->dev, | |
17ed5bef | 627 | "Program transport params failed: %d\n", ret); |
99b8a5d6 SK |
628 | return ret; |
629 | } | |
630 | ||
631 | ret = sdw_notify_config(m_rt); | |
632 | if (ret < 0) { | |
62f0cec3 VK |
633 | dev_err(bus->dev, |
634 | "Notify bus config failed: %d\n", ret); | |
99b8a5d6 SK |
635 | return ret; |
636 | } | |
637 | ||
638 | /* Enable port(s) on alternate bank for all active streams */ | |
639 | if (m_rt->stream->state != SDW_STREAM_ENABLED) | |
640 | continue; | |
641 | ||
642 | ret = sdw_enable_disable_ports(m_rt, true); | |
643 | if (ret < 0) { | |
17ed5bef | 644 | dev_err(bus->dev, "Enable channel failed: %d\n", ret); |
99b8a5d6 SK |
645 | return ret; |
646 | } | |
647 | } | |
648 | ||
649 | return ret; | |
650 | } | |
651 | ||
ce6e74d0 | 652 | static int sdw_bank_switch(struct sdw_bus *bus, int m_rt_count) |
99b8a5d6 SK |
653 | { |
654 | int col_index, row_index; | |
ce6e74d0 | 655 | bool multi_link; |
99b8a5d6 | 656 | struct sdw_msg *wr_msg; |
3a0be1a6 PLB |
657 | u8 *wbuf; |
658 | int ret; | |
99b8a5d6 SK |
659 | u16 addr; |
660 | ||
661 | wr_msg = kzalloc(sizeof(*wr_msg), GFP_KERNEL); | |
662 | if (!wr_msg) | |
663 | return -ENOMEM; | |
664 | ||
ce6e74d0 SN |
665 | bus->defer_msg.msg = wr_msg; |
666 | ||
99b8a5d6 SK |
667 | wbuf = kzalloc(sizeof(*wbuf), GFP_KERNEL); |
668 | if (!wbuf) { | |
669 | ret = -ENOMEM; | |
670 | goto error_1; | |
671 | } | |
672 | ||
673 | /* Get row and column index to program register */ | |
674 | col_index = sdw_find_col_index(bus->params.col); | |
675 | row_index = sdw_find_row_index(bus->params.row); | |
676 | wbuf[0] = col_index | (row_index << 3); | |
677 | ||
678 | if (bus->params.next_bank) | |
679 | addr = SDW_SCP_FRAMECTRL_B1; | |
680 | else | |
681 | addr = SDW_SCP_FRAMECTRL_B0; | |
682 | ||
683 | sdw_fill_msg(wr_msg, NULL, addr, 1, SDW_BROADCAST_DEV_NUM, | |
1fe74a5e | 684 | SDW_MSG_FLAG_WRITE, wbuf); |
99b8a5d6 SK |
685 | wr_msg->ssp_sync = true; |
686 | ||
ce6e74d0 SN |
687 | /* |
688 | * Set the multi_link flag only when both the hardware supports | |
063ff4e5 | 689 | * and hardware-based sync is required |
ce6e74d0 | 690 | */ |
063ff4e5 | 691 | multi_link = bus->multi_link && (m_rt_count >= bus->hw_sync_min_links); |
ce6e74d0 SN |
692 | |
693 | if (multi_link) | |
694 | ret = sdw_transfer_defer(bus, wr_msg, &bus->defer_msg); | |
695 | else | |
696 | ret = sdw_transfer(bus, wr_msg); | |
697 | ||
99b8a5d6 | 698 | if (ret < 0) { |
17ed5bef | 699 | dev_err(bus->dev, "Slave frame_ctrl reg write failed\n"); |
99b8a5d6 SK |
700 | goto error; |
701 | } | |
702 | ||
ce6e74d0 SN |
703 | if (!multi_link) { |
704 | kfree(wr_msg); | |
705 | kfree(wbuf); | |
706 | bus->defer_msg.msg = NULL; | |
707 | bus->params.curr_bank = !bus->params.curr_bank; | |
708 | bus->params.next_bank = !bus->params.next_bank; | |
709 | } | |
99b8a5d6 SK |
710 | |
711 | return 0; | |
712 | ||
713 | error: | |
714 | kfree(wbuf); | |
715 | error_1: | |
716 | kfree(wr_msg); | |
717 | return ret; | |
718 | } | |
719 | ||
ce6e74d0 SN |
720 | /** |
721 | * sdw_ml_sync_bank_switch: Multilink register bank switch | |
722 | * | |
723 | * @bus: SDW bus instance | |
724 | * | |
725 | * Caller function should free the buffers on error | |
726 | */ | |
727 | static int sdw_ml_sync_bank_switch(struct sdw_bus *bus) | |
728 | { | |
729 | unsigned long time_left; | |
730 | ||
731 | if (!bus->multi_link) | |
732 | return 0; | |
733 | ||
734 | /* Wait for completion of transfer */ | |
735 | time_left = wait_for_completion_timeout(&bus->defer_msg.complete, | |
736 | bus->bank_switch_timeout); | |
737 | ||
738 | if (!time_left) { | |
17ed5bef | 739 | dev_err(bus->dev, "Controller Timed out on bank switch\n"); |
ce6e74d0 SN |
740 | return -ETIMEDOUT; |
741 | } | |
742 | ||
743 | bus->params.curr_bank = !bus->params.curr_bank; | |
744 | bus->params.next_bank = !bus->params.next_bank; | |
745 | ||
746 | if (bus->defer_msg.msg) { | |
747 | kfree(bus->defer_msg.msg->buf); | |
748 | kfree(bus->defer_msg.msg); | |
749 | } | |
750 | ||
751 | return 0; | |
752 | } | |
753 | ||
99b8a5d6 SK |
754 | static int do_bank_switch(struct sdw_stream_runtime *stream) |
755 | { | |
3a0be1a6 | 756 | struct sdw_master_runtime *m_rt; |
99b8a5d6 | 757 | const struct sdw_master_ops *ops; |
3a0be1a6 | 758 | struct sdw_bus *bus; |
ce6e74d0 | 759 | bool multi_link = false; |
063ff4e5 | 760 | int m_rt_count; |
99b8a5d6 SK |
761 | int ret = 0; |
762 | ||
063ff4e5 PLB |
763 | m_rt_count = stream->m_rt_count; |
764 | ||
48949722 VK |
765 | list_for_each_entry(m_rt, &stream->master_list, stream_node) { |
766 | bus = m_rt->bus; | |
767 | ops = bus->ops; | |
768 | ||
063ff4e5 | 769 | if (bus->multi_link && m_rt_count >= bus->hw_sync_min_links) { |
ce6e74d0 SN |
770 | multi_link = true; |
771 | mutex_lock(&bus->msg_lock); | |
772 | } | |
773 | ||
48949722 VK |
774 | /* Pre-bank switch */ |
775 | if (ops->pre_bank_switch) { | |
776 | ret = ops->pre_bank_switch(bus); | |
777 | if (ret < 0) { | |
778 | dev_err(bus->dev, | |
17ed5bef | 779 | "Pre bank switch op failed: %d\n", ret); |
ce6e74d0 | 780 | goto msg_unlock; |
48949722 VK |
781 | } |
782 | } | |
783 | ||
ce6e74d0 SN |
784 | /* |
785 | * Perform Bank switch operation. | |
786 | * For multi link cases, the actual bank switch is | |
787 | * synchronized across all Masters and happens later as a | |
788 | * part of post_bank_switch ops. | |
789 | */ | |
063ff4e5 | 790 | ret = sdw_bank_switch(bus, m_rt_count); |
99b8a5d6 | 791 | if (ret < 0) { |
17ed5bef | 792 | dev_err(bus->dev, "Bank switch failed: %d\n", ret); |
ce6e74d0 | 793 | goto error; |
99b8a5d6 SK |
794 | } |
795 | } | |
796 | ||
ce6e74d0 SN |
797 | /* |
798 | * For multi link cases, it is expected that the bank switch is | |
799 | * triggered by the post_bank_switch for the first Master in the list | |
800 | * and for the other Masters the post_bank_switch() should return doing | |
801 | * nothing. | |
802 | */ | |
48949722 VK |
803 | list_for_each_entry(m_rt, &stream->master_list, stream_node) { |
804 | bus = m_rt->bus; | |
805 | ops = bus->ops; | |
99b8a5d6 | 806 | |
48949722 VK |
807 | /* Post-bank switch */ |
808 | if (ops->post_bank_switch) { | |
809 | ret = ops->post_bank_switch(bus); | |
810 | if (ret < 0) { | |
811 | dev_err(bus->dev, | |
62f0cec3 VK |
812 | "Post bank switch op failed: %d\n", |
813 | ret); | |
ce6e74d0 | 814 | goto error; |
48949722 | 815 | } |
063ff4e5 | 816 | } else if (multi_link) { |
ce6e74d0 | 817 | dev_err(bus->dev, |
17ed5bef | 818 | "Post bank switch ops not implemented\n"); |
ce6e74d0 SN |
819 | goto error; |
820 | } | |
821 | ||
822 | /* Set the bank switch timeout to default, if not set */ | |
823 | if (!bus->bank_switch_timeout) | |
824 | bus->bank_switch_timeout = DEFAULT_BANK_SWITCH_TIMEOUT; | |
825 | ||
826 | /* Check if bank switch was successful */ | |
827 | ret = sdw_ml_sync_bank_switch(bus); | |
828 | if (ret < 0) { | |
829 | dev_err(bus->dev, | |
17ed5bef | 830 | "multi link bank switch failed: %d\n", ret); |
ce6e74d0 SN |
831 | goto error; |
832 | } | |
833 | ||
063ff4e5 | 834 | if (multi_link) |
9315d904 | 835 | mutex_unlock(&bus->msg_lock); |
ce6e74d0 SN |
836 | } |
837 | ||
838 | return ret; | |
839 | ||
840 | error: | |
841 | list_for_each_entry(m_rt, &stream->master_list, stream_node) { | |
ce6e74d0 SN |
842 | bus = m_rt->bus; |
843 | ||
844 | kfree(bus->defer_msg.msg->buf); | |
845 | kfree(bus->defer_msg.msg); | |
846 | } | |
847 | ||
848 | msg_unlock: | |
849 | ||
850 | if (multi_link) { | |
851 | list_for_each_entry(m_rt, &stream->master_list, stream_node) { | |
852 | bus = m_rt->bus; | |
853 | if (mutex_is_locked(&bus->msg_lock)) | |
854 | mutex_unlock(&bus->msg_lock); | |
99b8a5d6 SK |
855 | } |
856 | } | |
857 | ||
858 | return ret; | |
859 | } | |
860 | ||
89e59053 SK |
861 | /** |
862 | * sdw_release_stream() - Free the assigned stream runtime | |
863 | * | |
864 | * @stream: SoundWire stream runtime | |
865 | * | |
866 | * sdw_release_stream should be called only once per stream | |
867 | */ | |
868 | void sdw_release_stream(struct sdw_stream_runtime *stream) | |
869 | { | |
870 | kfree(stream); | |
871 | } | |
872 | EXPORT_SYMBOL(sdw_release_stream); | |
873 | ||
874 | /** | |
875 | * sdw_alloc_stream() - Allocate and return stream runtime | |
876 | * | |
877 | * @stream_name: SoundWire stream name | |
878 | * | |
879 | * Allocates a SoundWire stream runtime instance. | |
880 | * sdw_alloc_stream should be called only once per stream. Typically | |
881 | * invoked from ALSA/ASoC machine/platform driver. | |
882 | */ | |
dfcff3f8 | 883 | struct sdw_stream_runtime *sdw_alloc_stream(const char *stream_name) |
89e59053 SK |
884 | { |
885 | struct sdw_stream_runtime *stream; | |
886 | ||
887 | stream = kzalloc(sizeof(*stream), GFP_KERNEL); | |
888 | if (!stream) | |
889 | return NULL; | |
890 | ||
891 | stream->name = stream_name; | |
0c4a1049 | 892 | INIT_LIST_HEAD(&stream->master_list); |
89e59053 | 893 | stream->state = SDW_STREAM_ALLOCATED; |
9b5c132a | 894 | stream->m_rt_count = 0; |
89e59053 SK |
895 | |
896 | return stream; | |
897 | } | |
898 | EXPORT_SYMBOL(sdw_alloc_stream); | |
899 | ||
48949722 VK |
900 | static struct sdw_master_runtime |
901 | *sdw_find_master_rt(struct sdw_bus *bus, | |
1fe74a5e | 902 | struct sdw_stream_runtime *stream) |
48949722 | 903 | { |
3a0be1a6 | 904 | struct sdw_master_runtime *m_rt; |
48949722 VK |
905 | |
906 | /* Retrieve Bus handle if already available */ | |
907 | list_for_each_entry(m_rt, &stream->master_list, stream_node) { | |
908 | if (m_rt->bus == bus) | |
909 | return m_rt; | |
910 | } | |
911 | ||
912 | return NULL; | |
913 | } | |
914 | ||
89e59053 SK |
915 | /** |
916 | * sdw_alloc_master_rt() - Allocates and initialize Master runtime handle | |
917 | * | |
918 | * @bus: SDW bus instance | |
919 | * @stream_config: Stream configuration | |
920 | * @stream: Stream runtime handle. | |
921 | * | |
922 | * This function is to be called with bus_lock held. | |
923 | */ | |
924 | static struct sdw_master_runtime | |
925 | *sdw_alloc_master_rt(struct sdw_bus *bus, | |
1fe74a5e PLB |
926 | struct sdw_stream_config *stream_config, |
927 | struct sdw_stream_runtime *stream) | |
89e59053 SK |
928 | { |
929 | struct sdw_master_runtime *m_rt; | |
930 | ||
89e59053 SK |
931 | /* |
932 | * check if Master is already allocated (as a result of Slave adding | |
933 | * it first), if so skip allocation and go to configure | |
934 | */ | |
48949722 | 935 | m_rt = sdw_find_master_rt(bus, stream); |
89e59053 SK |
936 | if (m_rt) |
937 | goto stream_config; | |
938 | ||
939 | m_rt = kzalloc(sizeof(*m_rt), GFP_KERNEL); | |
940 | if (!m_rt) | |
941 | return NULL; | |
942 | ||
943 | /* Initialization of Master runtime handle */ | |
bbe7379d | 944 | INIT_LIST_HEAD(&m_rt->port_list); |
89e59053 | 945 | INIT_LIST_HEAD(&m_rt->slave_rt_list); |
48949722 | 946 | list_add_tail(&m_rt->stream_node, &stream->master_list); |
89e59053 SK |
947 | |
948 | list_add_tail(&m_rt->bus_node, &bus->m_rt_list); | |
949 | ||
950 | stream_config: | |
951 | m_rt->ch_count = stream_config->ch_count; | |
952 | m_rt->bus = bus; | |
953 | m_rt->stream = stream; | |
954 | m_rt->direction = stream_config->direction; | |
955 | ||
956 | return m_rt; | |
957 | } | |
958 | ||
959 | /** | |
960 | * sdw_alloc_slave_rt() - Allocate and initialize Slave runtime handle. | |
961 | * | |
962 | * @slave: Slave handle | |
963 | * @stream_config: Stream configuration | |
964 | * @stream: Stream runtime handle | |
965 | * | |
966 | * This function is to be called with bus_lock held. | |
967 | */ | |
968 | static struct sdw_slave_runtime | |
969 | *sdw_alloc_slave_rt(struct sdw_slave *slave, | |
1fe74a5e PLB |
970 | struct sdw_stream_config *stream_config, |
971 | struct sdw_stream_runtime *stream) | |
89e59053 | 972 | { |
3a0be1a6 | 973 | struct sdw_slave_runtime *s_rt; |
89e59053 SK |
974 | |
975 | s_rt = kzalloc(sizeof(*s_rt), GFP_KERNEL); | |
976 | if (!s_rt) | |
977 | return NULL; | |
978 | ||
bbe7379d | 979 | INIT_LIST_HEAD(&s_rt->port_list); |
89e59053 SK |
980 | s_rt->ch_count = stream_config->ch_count; |
981 | s_rt->direction = stream_config->direction; | |
982 | s_rt->slave = slave; | |
983 | ||
984 | return s_rt; | |
985 | } | |
986 | ||
bbe7379d | 987 | static void sdw_master_port_release(struct sdw_bus *bus, |
1fe74a5e | 988 | struct sdw_master_runtime *m_rt) |
bbe7379d SK |
989 | { |
990 | struct sdw_port_runtime *p_rt, *_p_rt; | |
991 | ||
1fe74a5e | 992 | list_for_each_entry_safe(p_rt, _p_rt, &m_rt->port_list, port_node) { |
bbe7379d SK |
993 | list_del(&p_rt->port_node); |
994 | kfree(p_rt); | |
995 | } | |
996 | } | |
997 | ||
998 | static void sdw_slave_port_release(struct sdw_bus *bus, | |
1fe74a5e PLB |
999 | struct sdw_slave *slave, |
1000 | struct sdw_stream_runtime *stream) | |
bbe7379d SK |
1001 | { |
1002 | struct sdw_port_runtime *p_rt, *_p_rt; | |
48949722 | 1003 | struct sdw_master_runtime *m_rt; |
bbe7379d SK |
1004 | struct sdw_slave_runtime *s_rt; |
1005 | ||
48949722 VK |
1006 | list_for_each_entry(m_rt, &stream->master_list, stream_node) { |
1007 | list_for_each_entry(s_rt, &m_rt->slave_rt_list, m_rt_node) { | |
48949722 VK |
1008 | if (s_rt->slave != slave) |
1009 | continue; | |
1010 | ||
1011 | list_for_each_entry_safe(p_rt, _p_rt, | |
1fe74a5e | 1012 | &s_rt->port_list, port_node) { |
48949722 VK |
1013 | list_del(&p_rt->port_node); |
1014 | kfree(p_rt); | |
1015 | } | |
bbe7379d SK |
1016 | } |
1017 | } | |
1018 | } | |
1019 | ||
89e59053 SK |
1020 | /** |
1021 | * sdw_release_slave_stream() - Free Slave(s) runtime handle | |
1022 | * | |
1023 | * @slave: Slave handle. | |
1024 | * @stream: Stream runtime handle. | |
1025 | * | |
1026 | * This function is to be called with bus_lock held. | |
1027 | */ | |
1028 | static void sdw_release_slave_stream(struct sdw_slave *slave, | |
1fe74a5e | 1029 | struct sdw_stream_runtime *stream) |
89e59053 SK |
1030 | { |
1031 | struct sdw_slave_runtime *s_rt, *_s_rt; | |
48949722 | 1032 | struct sdw_master_runtime *m_rt; |
89e59053 | 1033 | |
48949722 VK |
1034 | list_for_each_entry(m_rt, &stream->master_list, stream_node) { |
1035 | /* Retrieve Slave runtime handle */ | |
1036 | list_for_each_entry_safe(s_rt, _s_rt, | |
1fe74a5e | 1037 | &m_rt->slave_rt_list, m_rt_node) { |
48949722 VK |
1038 | if (s_rt->slave == slave) { |
1039 | list_del(&s_rt->m_rt_node); | |
1040 | kfree(s_rt); | |
1041 | return; | |
1042 | } | |
89e59053 SK |
1043 | } |
1044 | } | |
1045 | } | |
1046 | ||
1047 | /** | |
1048 | * sdw_release_master_stream() - Free Master runtime handle | |
1049 | * | |
48949722 | 1050 | * @m_rt: Master runtime node |
89e59053 SK |
1051 | * @stream: Stream runtime handle. |
1052 | * | |
1053 | * This function is to be called with bus_lock held | |
1054 | * It frees the Master runtime handle and associated Slave(s) runtime | |
1055 | * handle. If this is called first then sdw_release_slave_stream() will have | |
1056 | * no effect as Slave(s) runtime handle would already be freed up. | |
1057 | */ | |
48949722 | 1058 | static void sdw_release_master_stream(struct sdw_master_runtime *m_rt, |
1fe74a5e | 1059 | struct sdw_stream_runtime *stream) |
89e59053 | 1060 | { |
89e59053 SK |
1061 | struct sdw_slave_runtime *s_rt, *_s_rt; |
1062 | ||
8d6ccf5c SK |
1063 | list_for_each_entry_safe(s_rt, _s_rt, &m_rt->slave_rt_list, m_rt_node) { |
1064 | sdw_slave_port_release(s_rt->slave->bus, s_rt->slave, stream); | |
1065 | sdw_release_slave_stream(s_rt->slave, stream); | |
1066 | } | |
89e59053 | 1067 | |
48949722 | 1068 | list_del(&m_rt->stream_node); |
89e59053 | 1069 | list_del(&m_rt->bus_node); |
48949722 | 1070 | kfree(m_rt); |
89e59053 SK |
1071 | } |
1072 | ||
1073 | /** | |
1074 | * sdw_stream_remove_master() - Remove master from sdw_stream | |
1075 | * | |
1076 | * @bus: SDW Bus instance | |
1077 | * @stream: SoundWire stream | |
1078 | * | |
bbe7379d | 1079 | * This removes and frees port_rt and master_rt from a stream |
89e59053 SK |
1080 | */ |
1081 | int sdw_stream_remove_master(struct sdw_bus *bus, | |
1fe74a5e | 1082 | struct sdw_stream_runtime *stream) |
89e59053 | 1083 | { |
48949722 VK |
1084 | struct sdw_master_runtime *m_rt, *_m_rt; |
1085 | ||
89e59053 SK |
1086 | mutex_lock(&bus->bus_lock); |
1087 | ||
48949722 | 1088 | list_for_each_entry_safe(m_rt, _m_rt, |
1fe74a5e | 1089 | &stream->master_list, stream_node) { |
48949722 VK |
1090 | if (m_rt->bus != bus) |
1091 | continue; | |
1092 | ||
1093 | sdw_master_port_release(bus, m_rt); | |
1094 | sdw_release_master_stream(m_rt, stream); | |
ce6e74d0 | 1095 | stream->m_rt_count--; |
48949722 VK |
1096 | } |
1097 | ||
1098 | if (list_empty(&stream->master_list)) | |
1099 | stream->state = SDW_STREAM_RELEASED; | |
89e59053 SK |
1100 | |
1101 | mutex_unlock(&bus->bus_lock); | |
1102 | ||
1103 | return 0; | |
1104 | } | |
1105 | EXPORT_SYMBOL(sdw_stream_remove_master); | |
1106 | ||
1107 | /** | |
1108 | * sdw_stream_remove_slave() - Remove slave from sdw_stream | |
1109 | * | |
1110 | * @slave: SDW Slave instance | |
1111 | * @stream: SoundWire stream | |
1112 | * | |
bbe7379d | 1113 | * This removes and frees port_rt and slave_rt from a stream |
89e59053 SK |
1114 | */ |
1115 | int sdw_stream_remove_slave(struct sdw_slave *slave, | |
1fe74a5e | 1116 | struct sdw_stream_runtime *stream) |
89e59053 SK |
1117 | { |
1118 | mutex_lock(&slave->bus->bus_lock); | |
1119 | ||
bbe7379d | 1120 | sdw_slave_port_release(slave->bus, slave, stream); |
89e59053 SK |
1121 | sdw_release_slave_stream(slave, stream); |
1122 | ||
1123 | mutex_unlock(&slave->bus->bus_lock); | |
1124 | ||
1125 | return 0; | |
1126 | } | |
1127 | EXPORT_SYMBOL(sdw_stream_remove_slave); | |
1128 | ||
1129 | /** | |
1130 | * sdw_config_stream() - Configure the allocated stream | |
1131 | * | |
1132 | * @dev: SDW device | |
1133 | * @stream: SoundWire stream | |
1134 | * @stream_config: Stream configuration for audio stream | |
1135 | * @is_slave: is API called from Slave or Master | |
1136 | * | |
1137 | * This function is to be called with bus_lock held. | |
1138 | */ | |
1139 | static int sdw_config_stream(struct device *dev, | |
1fe74a5e PLB |
1140 | struct sdw_stream_runtime *stream, |
1141 | struct sdw_stream_config *stream_config, | |
1142 | bool is_slave) | |
89e59053 SK |
1143 | { |
1144 | /* | |
1145 | * Update the stream rate, channel and bps based on data | |
1146 | * source. For more than one data source (multilink), | |
1147 | * match the rate, bps, stream type and increment number of channels. | |
1148 | * | |
1149 | * If rate/bps is zero, it means the values are not set, so skip | |
1150 | * comparison and allow the value to be set and stored in stream | |
1151 | */ | |
1152 | if (stream->params.rate && | |
1fe74a5e | 1153 | stream->params.rate != stream_config->frame_rate) { |
17ed5bef | 1154 | dev_err(dev, "rate not matching, stream:%s\n", stream->name); |
89e59053 SK |
1155 | return -EINVAL; |
1156 | } | |
1157 | ||
1158 | if (stream->params.bps && | |
1fe74a5e | 1159 | stream->params.bps != stream_config->bps) { |
17ed5bef | 1160 | dev_err(dev, "bps not matching, stream:%s\n", stream->name); |
89e59053 SK |
1161 | return -EINVAL; |
1162 | } | |
1163 | ||
1164 | stream->type = stream_config->type; | |
1165 | stream->params.rate = stream_config->frame_rate; | |
1166 | stream->params.bps = stream_config->bps; | |
1167 | ||
1168 | /* TODO: Update this check during Device-device support */ | |
1169 | if (is_slave) | |
1170 | stream->params.ch_count += stream_config->ch_count; | |
1171 | ||
1172 | return 0; | |
1173 | } | |
1174 | ||
bbe7379d | 1175 | static int sdw_is_valid_port_range(struct device *dev, |
1fe74a5e | 1176 | struct sdw_port_runtime *p_rt) |
bbe7379d SK |
1177 | { |
1178 | if (!SDW_VALID_PORT_RANGE(p_rt->num)) { | |
1179 | dev_err(dev, | |
17ed5bef | 1180 | "SoundWire: Invalid port number :%d\n", p_rt->num); |
bbe7379d SK |
1181 | return -EINVAL; |
1182 | } | |
1183 | ||
1184 | return 0; | |
1185 | } | |
1186 | ||
1fe74a5e PLB |
1187 | static struct sdw_port_runtime |
1188 | *sdw_port_alloc(struct device *dev, | |
1189 | struct sdw_port_config *port_config, | |
1190 | int port_index) | |
bbe7379d SK |
1191 | { |
1192 | struct sdw_port_runtime *p_rt; | |
1193 | ||
1194 | p_rt = kzalloc(sizeof(*p_rt), GFP_KERNEL); | |
1195 | if (!p_rt) | |
1196 | return NULL; | |
1197 | ||
1198 | p_rt->ch_mask = port_config[port_index].ch_mask; | |
1199 | p_rt->num = port_config[port_index].num; | |
1200 | ||
1201 | return p_rt; | |
1202 | } | |
1203 | ||
1204 | static int sdw_master_port_config(struct sdw_bus *bus, | |
1fe74a5e PLB |
1205 | struct sdw_master_runtime *m_rt, |
1206 | struct sdw_port_config *port_config, | |
1207 | unsigned int num_ports) | |
bbe7379d SK |
1208 | { |
1209 | struct sdw_port_runtime *p_rt; | |
1210 | int i; | |
1211 | ||
1212 | /* Iterate for number of ports to perform initialization */ | |
1213 | for (i = 0; i < num_ports; i++) { | |
1214 | p_rt = sdw_port_alloc(bus->dev, port_config, i); | |
1215 | if (!p_rt) | |
1216 | return -ENOMEM; | |
1217 | ||
1218 | /* | |
1219 | * TODO: Check port capabilities for requested | |
1220 | * configuration (audio mode support) | |
1221 | */ | |
1222 | ||
1223 | list_add_tail(&p_rt->port_node, &m_rt->port_list); | |
1224 | } | |
1225 | ||
1226 | return 0; | |
1227 | } | |
1228 | ||
1229 | static int sdw_slave_port_config(struct sdw_slave *slave, | |
1fe74a5e PLB |
1230 | struct sdw_slave_runtime *s_rt, |
1231 | struct sdw_port_config *port_config, | |
1232 | unsigned int num_config) | |
bbe7379d SK |
1233 | { |
1234 | struct sdw_port_runtime *p_rt; | |
1235 | int i, ret; | |
1236 | ||
1237 | /* Iterate for number of ports to perform initialization */ | |
1238 | for (i = 0; i < num_config; i++) { | |
1239 | p_rt = sdw_port_alloc(&slave->dev, port_config, i); | |
1240 | if (!p_rt) | |
1241 | return -ENOMEM; | |
1242 | ||
1243 | /* | |
1244 | * TODO: Check valid port range as defined by DisCo/ | |
1245 | * slave | |
1246 | */ | |
1247 | ret = sdw_is_valid_port_range(&slave->dev, p_rt); | |
1248 | if (ret < 0) { | |
1249 | kfree(p_rt); | |
1250 | return ret; | |
1251 | } | |
1252 | ||
1253 | /* | |
1254 | * TODO: Check port capabilities for requested | |
1255 | * configuration (audio mode support) | |
1256 | */ | |
1257 | ||
1258 | list_add_tail(&p_rt->port_node, &s_rt->port_list); | |
1259 | } | |
1260 | ||
1261 | return 0; | |
1262 | } | |
1263 | ||
89e59053 SK |
1264 | /** |
1265 | * sdw_stream_add_master() - Allocate and add master runtime to a stream | |
1266 | * | |
1267 | * @bus: SDW Bus instance | |
1268 | * @stream_config: Stream configuration for audio stream | |
bbe7379d SK |
1269 | * @port_config: Port configuration for audio stream |
1270 | * @num_ports: Number of ports | |
89e59053 SK |
1271 | * @stream: SoundWire stream |
1272 | */ | |
1273 | int sdw_stream_add_master(struct sdw_bus *bus, | |
1fe74a5e PLB |
1274 | struct sdw_stream_config *stream_config, |
1275 | struct sdw_port_config *port_config, | |
1276 | unsigned int num_ports, | |
1277 | struct sdw_stream_runtime *stream) | |
89e59053 | 1278 | { |
3a0be1a6 | 1279 | struct sdw_master_runtime *m_rt; |
89e59053 SK |
1280 | int ret; |
1281 | ||
1282 | mutex_lock(&bus->bus_lock); | |
1283 | ||
ce6e74d0 SN |
1284 | /* |
1285 | * For multi link streams, add the second master only if | |
1286 | * the bus supports it. | |
1287 | * Check if bus->multi_link is set | |
1288 | */ | |
1289 | if (!bus->multi_link && stream->m_rt_count > 0) { | |
1290 | dev_err(bus->dev, | |
17ed5bef | 1291 | "Multilink not supported, link %d\n", bus->link_id); |
ce6e74d0 SN |
1292 | ret = -EINVAL; |
1293 | goto unlock; | |
1294 | } | |
1295 | ||
89e59053 SK |
1296 | m_rt = sdw_alloc_master_rt(bus, stream_config, stream); |
1297 | if (!m_rt) { | |
1298 | dev_err(bus->dev, | |
17ed5bef | 1299 | "Master runtime config failed for stream:%s\n", |
1fe74a5e | 1300 | stream->name); |
89e59053 | 1301 | ret = -ENOMEM; |
3fef1a22 | 1302 | goto unlock; |
89e59053 SK |
1303 | } |
1304 | ||
1305 | ret = sdw_config_stream(bus->dev, stream, stream_config, false); | |
1306 | if (ret) | |
1307 | goto stream_error; | |
1308 | ||
bbe7379d SK |
1309 | ret = sdw_master_port_config(bus, m_rt, port_config, num_ports); |
1310 | if (ret) | |
1311 | goto stream_error; | |
1312 | ||
ce6e74d0 SN |
1313 | stream->m_rt_count++; |
1314 | ||
3fef1a22 SN |
1315 | goto unlock; |
1316 | ||
89e59053 | 1317 | stream_error: |
48949722 | 1318 | sdw_release_master_stream(m_rt, stream); |
3fef1a22 | 1319 | unlock: |
89e59053 SK |
1320 | mutex_unlock(&bus->bus_lock); |
1321 | return ret; | |
1322 | } | |
1323 | EXPORT_SYMBOL(sdw_stream_add_master); | |
1324 | ||
1325 | /** | |
1326 | * sdw_stream_add_slave() - Allocate and add master/slave runtime to a stream | |
1327 | * | |
1328 | * @slave: SDW Slave instance | |
1329 | * @stream_config: Stream configuration for audio stream | |
1330 | * @stream: SoundWire stream | |
bbe7379d SK |
1331 | * @port_config: Port configuration for audio stream |
1332 | * @num_ports: Number of ports | |
0aebe40b SN |
1333 | * |
1334 | * It is expected that Slave is added before adding Master | |
1335 | * to the Stream. | |
1336 | * | |
89e59053 SK |
1337 | */ |
1338 | int sdw_stream_add_slave(struct sdw_slave *slave, | |
1fe74a5e PLB |
1339 | struct sdw_stream_config *stream_config, |
1340 | struct sdw_port_config *port_config, | |
1341 | unsigned int num_ports, | |
1342 | struct sdw_stream_runtime *stream) | |
89e59053 SK |
1343 | { |
1344 | struct sdw_slave_runtime *s_rt; | |
1345 | struct sdw_master_runtime *m_rt; | |
1346 | int ret; | |
1347 | ||
1348 | mutex_lock(&slave->bus->bus_lock); | |
1349 | ||
1350 | /* | |
1351 | * If this API is invoked by Slave first then m_rt is not valid. | |
1352 | * So, allocate m_rt and add Slave to it. | |
1353 | */ | |
1354 | m_rt = sdw_alloc_master_rt(slave->bus, stream_config, stream); | |
1355 | if (!m_rt) { | |
1356 | dev_err(&slave->dev, | |
17ed5bef | 1357 | "alloc master runtime failed for stream:%s\n", |
1fe74a5e | 1358 | stream->name); |
89e59053 SK |
1359 | ret = -ENOMEM; |
1360 | goto error; | |
1361 | } | |
1362 | ||
1363 | s_rt = sdw_alloc_slave_rt(slave, stream_config, stream); | |
1364 | if (!s_rt) { | |
1365 | dev_err(&slave->dev, | |
17ed5bef | 1366 | "Slave runtime config failed for stream:%s\n", |
1fe74a5e | 1367 | stream->name); |
89e59053 SK |
1368 | ret = -ENOMEM; |
1369 | goto stream_error; | |
1370 | } | |
1371 | ||
1372 | ret = sdw_config_stream(&slave->dev, stream, stream_config, true); | |
1373 | if (ret) | |
1374 | goto stream_error; | |
1375 | ||
1376 | list_add_tail(&s_rt->m_rt_node, &m_rt->slave_rt_list); | |
1377 | ||
bbe7379d SK |
1378 | ret = sdw_slave_port_config(slave, s_rt, port_config, num_ports); |
1379 | if (ret) | |
1380 | goto stream_error; | |
1381 | ||
0aebe40b SN |
1382 | /* |
1383 | * Change stream state to CONFIGURED on first Slave add. | |
1384 | * Bus is not aware of number of Slave(s) in a stream at this | |
1385 | * point so cannot depend on all Slave(s) to be added in order to | |
1386 | * change stream state to CONFIGURED. | |
1387 | */ | |
89e59053 SK |
1388 | stream->state = SDW_STREAM_CONFIGURED; |
1389 | goto error; | |
1390 | ||
1391 | stream_error: | |
1392 | /* | |
1393 | * we hit error so cleanup the stream, release all Slave(s) and | |
1394 | * Master runtime | |
1395 | */ | |
48949722 | 1396 | sdw_release_master_stream(m_rt, stream); |
89e59053 SK |
1397 | error: |
1398 | mutex_unlock(&slave->bus->bus_lock); | |
1399 | return ret; | |
1400 | } | |
1401 | EXPORT_SYMBOL(sdw_stream_add_slave); | |
f8101c74 SK |
1402 | |
1403 | /** | |
1404 | * sdw_get_slave_dpn_prop() - Get Slave port capabilities | |
1405 | * | |
1406 | * @slave: Slave handle | |
1407 | * @direction: Data direction. | |
1408 | * @port_num: Port number | |
1409 | */ | |
1410 | struct sdw_dpn_prop *sdw_get_slave_dpn_prop(struct sdw_slave *slave, | |
1fe74a5e PLB |
1411 | enum sdw_data_direction direction, |
1412 | unsigned int port_num) | |
f8101c74 SK |
1413 | { |
1414 | struct sdw_dpn_prop *dpn_prop; | |
1415 | u8 num_ports; | |
1416 | int i; | |
1417 | ||
1418 | if (direction == SDW_DATA_DIR_TX) { | |
1419 | num_ports = hweight32(slave->prop.source_ports); | |
1420 | dpn_prop = slave->prop.src_dpn_prop; | |
1421 | } else { | |
1422 | num_ports = hweight32(slave->prop.sink_ports); | |
1423 | dpn_prop = slave->prop.sink_dpn_prop; | |
1424 | } | |
1425 | ||
1426 | for (i = 0; i < num_ports; i++) { | |
03ecad90 | 1427 | if (dpn_prop[i].num == port_num) |
f8101c74 SK |
1428 | return &dpn_prop[i]; |
1429 | } | |
1430 | ||
1431 | return NULL; | |
1432 | } | |
5c3eb9f7 | 1433 | |
0c4a1049 SK |
1434 | /** |
1435 | * sdw_acquire_bus_lock: Acquire bus lock for all Master runtime(s) | |
1436 | * | |
1437 | * @stream: SoundWire stream | |
1438 | * | |
1439 | * Acquire bus_lock for each of the master runtime(m_rt) part of this | |
1440 | * stream to reconfigure the bus. | |
1441 | * NOTE: This function is called from SoundWire stream ops and is | |
1442 | * expected that a global lock is held before acquiring bus_lock. | |
1443 | */ | |
1444 | static void sdw_acquire_bus_lock(struct sdw_stream_runtime *stream) | |
1445 | { | |
3a0be1a6 | 1446 | struct sdw_master_runtime *m_rt; |
0c4a1049 SK |
1447 | struct sdw_bus *bus = NULL; |
1448 | ||
1449 | /* Iterate for all Master(s) in Master list */ | |
1450 | list_for_each_entry(m_rt, &stream->master_list, stream_node) { | |
1451 | bus = m_rt->bus; | |
1452 | ||
1453 | mutex_lock(&bus->bus_lock); | |
1454 | } | |
1455 | } | |
1456 | ||
1457 | /** | |
1458 | * sdw_release_bus_lock: Release bus lock for all Master runtime(s) | |
1459 | * | |
1460 | * @stream: SoundWire stream | |
1461 | * | |
1462 | * Release the previously held bus_lock after reconfiguring the bus. | |
48949722 VK |
1463 | * NOTE: This function is called from SoundWire stream ops and is |
1464 | * expected that a global lock is held before releasing bus_lock. | |
0c4a1049 SK |
1465 | */ |
1466 | static void sdw_release_bus_lock(struct sdw_stream_runtime *stream) | |
1467 | { | |
1468 | struct sdw_master_runtime *m_rt = NULL; | |
1469 | struct sdw_bus *bus = NULL; | |
1470 | ||
1471 | /* Iterate for all Master(s) in Master list */ | |
1472 | list_for_each_entry_reverse(m_rt, &stream->master_list, stream_node) { | |
1473 | bus = m_rt->bus; | |
1474 | mutex_unlock(&bus->bus_lock); | |
1475 | } | |
1476 | } | |
1477 | ||
c7a8f049 PLB |
1478 | static int _sdw_prepare_stream(struct sdw_stream_runtime *stream, |
1479 | bool update_params) | |
5c3eb9f7 | 1480 | { |
3a0be1a6 | 1481 | struct sdw_master_runtime *m_rt; |
48949722 | 1482 | struct sdw_bus *bus = NULL; |
3a0be1a6 | 1483 | struct sdw_master_prop *prop; |
5c3eb9f7 SK |
1484 | struct sdw_bus_params params; |
1485 | int ret; | |
1486 | ||
48949722 VK |
1487 | /* Prepare Master(s) and Slave(s) port(s) associated with stream */ |
1488 | list_for_each_entry(m_rt, &stream->master_list, stream_node) { | |
1489 | bus = m_rt->bus; | |
1490 | prop = &bus->prop; | |
1491 | memcpy(¶ms, &bus->params, sizeof(params)); | |
5c3eb9f7 | 1492 | |
48949722 | 1493 | /* TODO: Support Asynchronous mode */ |
3424305b | 1494 | if ((prop->max_clk_freq % stream->params.rate) != 0) { |
17ed5bef | 1495 | dev_err(bus->dev, "Async mode not supported\n"); |
48949722 VK |
1496 | return -EINVAL; |
1497 | } | |
5c3eb9f7 | 1498 | |
c7a8f049 PLB |
1499 | if (!update_params) |
1500 | goto program_params; | |
1501 | ||
48949722 VK |
1502 | /* Increment cumulative bus bandwidth */ |
1503 | /* TODO: Update this during Device-Device support */ | |
1504 | bus->params.bandwidth += m_rt->stream->params.rate * | |
1505 | m_rt->ch_count * m_rt->stream->params.bps; | |
1506 | ||
c7578c1d VK |
1507 | /* Compute params */ |
1508 | if (bus->compute_params) { | |
1509 | ret = bus->compute_params(bus); | |
1510 | if (ret < 0) { | |
1511 | dev_err(bus->dev, "Compute params failed: %d", | |
1512 | ret); | |
1513 | return ret; | |
1514 | } | |
1515 | } | |
1516 | ||
c7a8f049 | 1517 | program_params: |
48949722 | 1518 | /* Program params */ |
bfaa3549 | 1519 | ret = sdw_program_params(bus, true); |
48949722 | 1520 | if (ret < 0) { |
17ed5bef | 1521 | dev_err(bus->dev, "Program params failed: %d\n", ret); |
48949722 VK |
1522 | goto restore_params; |
1523 | } | |
5c3eb9f7 SK |
1524 | } |
1525 | ||
3a0be1a6 PLB |
1526 | if (!bus) { |
1527 | pr_err("Configuration error in %s\n", __func__); | |
1528 | return -EINVAL; | |
1529 | } | |
1530 | ||
5c3eb9f7 SK |
1531 | ret = do_bank_switch(stream); |
1532 | if (ret < 0) { | |
17ed5bef | 1533 | dev_err(bus->dev, "Bank switch failed: %d\n", ret); |
5c3eb9f7 SK |
1534 | goto restore_params; |
1535 | } | |
1536 | ||
48949722 VK |
1537 | list_for_each_entry(m_rt, &stream->master_list, stream_node) { |
1538 | bus = m_rt->bus; | |
1539 | ||
1540 | /* Prepare port(s) on the new clock configuration */ | |
1541 | ret = sdw_prep_deprep_ports(m_rt, true); | |
1542 | if (ret < 0) { | |
17ed5bef | 1543 | dev_err(bus->dev, "Prepare port(s) failed ret = %d\n", |
1fe74a5e | 1544 | ret); |
48949722 VK |
1545 | return ret; |
1546 | } | |
5c3eb9f7 SK |
1547 | } |
1548 | ||
1549 | stream->state = SDW_STREAM_PREPARED; | |
1550 | ||
1551 | return ret; | |
1552 | ||
1553 | restore_params: | |
1554 | memcpy(&bus->params, ¶ms, sizeof(params)); | |
1555 | return ret; | |
1556 | } | |
1557 | ||
1558 | /** | |
1559 | * sdw_prepare_stream() - Prepare SoundWire stream | |
1560 | * | |
1561 | * @stream: Soundwire stream | |
1562 | * | |
34962fb8 | 1563 | * Documentation/driver-api/soundwire/stream.rst explains this API in detail |
5c3eb9f7 SK |
1564 | */ |
1565 | int sdw_prepare_stream(struct sdw_stream_runtime *stream) | |
1566 | { | |
c7a8f049 | 1567 | bool update_params = true; |
c32464c9 | 1568 | int ret; |
5c3eb9f7 SK |
1569 | |
1570 | if (!stream) { | |
17ed5bef | 1571 | pr_err("SoundWire: Handle not found for stream\n"); |
5c3eb9f7 SK |
1572 | return -EINVAL; |
1573 | } | |
1574 | ||
48949722 | 1575 | sdw_acquire_bus_lock(stream); |
5c3eb9f7 | 1576 | |
c32464c9 BL |
1577 | if (stream->state == SDW_STREAM_PREPARED) { |
1578 | ret = 0; | |
1579 | goto state_err; | |
1580 | } | |
1581 | ||
59528807 PLB |
1582 | if (stream->state != SDW_STREAM_CONFIGURED && |
1583 | stream->state != SDW_STREAM_DEPREPARED && | |
1584 | stream->state != SDW_STREAM_DISABLED) { | |
1585 | pr_err("%s: %s: inconsistent state state %d\n", | |
1586 | __func__, stream->name, stream->state); | |
1587 | ret = -EINVAL; | |
1588 | goto state_err; | |
1589 | } | |
1590 | ||
c7a8f049 PLB |
1591 | /* |
1592 | * when the stream is DISABLED, this means sdw_prepare_stream() | |
1593 | * is called as a result of an underflow or a resume operation. | |
1594 | * In this case, the bus parameters shall not be recomputed, but | |
1595 | * still need to be re-applied | |
1596 | */ | |
1597 | if (stream->state == SDW_STREAM_DISABLED) | |
1598 | update_params = false; | |
1599 | ||
1600 | ret = _sdw_prepare_stream(stream, update_params); | |
5c3eb9f7 | 1601 | |
59528807 | 1602 | state_err: |
48949722 | 1603 | sdw_release_bus_lock(stream); |
5c3eb9f7 SK |
1604 | return ret; |
1605 | } | |
1606 | EXPORT_SYMBOL(sdw_prepare_stream); | |
1607 | ||
1608 | static int _sdw_enable_stream(struct sdw_stream_runtime *stream) | |
1609 | { | |
3a0be1a6 | 1610 | struct sdw_master_runtime *m_rt; |
48949722 | 1611 | struct sdw_bus *bus = NULL; |
5c3eb9f7 SK |
1612 | int ret; |
1613 | ||
48949722 VK |
1614 | /* Enable Master(s) and Slave(s) port(s) associated with stream */ |
1615 | list_for_each_entry(m_rt, &stream->master_list, stream_node) { | |
1616 | bus = m_rt->bus; | |
5c3eb9f7 | 1617 | |
48949722 | 1618 | /* Program params */ |
bfaa3549 | 1619 | ret = sdw_program_params(bus, false); |
48949722 | 1620 | if (ret < 0) { |
17ed5bef | 1621 | dev_err(bus->dev, "Program params failed: %d\n", ret); |
48949722 VK |
1622 | return ret; |
1623 | } | |
1624 | ||
1625 | /* Enable port(s) */ | |
1626 | ret = sdw_enable_disable_ports(m_rt, true); | |
1627 | if (ret < 0) { | |
62f0cec3 VK |
1628 | dev_err(bus->dev, |
1629 | "Enable port(s) failed ret: %d\n", ret); | |
48949722 VK |
1630 | return ret; |
1631 | } | |
5c3eb9f7 SK |
1632 | } |
1633 | ||
3a0be1a6 PLB |
1634 | if (!bus) { |
1635 | pr_err("Configuration error in %s\n", __func__); | |
1636 | return -EINVAL; | |
1637 | } | |
1638 | ||
5c3eb9f7 SK |
1639 | ret = do_bank_switch(stream); |
1640 | if (ret < 0) { | |
17ed5bef | 1641 | dev_err(bus->dev, "Bank switch failed: %d\n", ret); |
5c3eb9f7 SK |
1642 | return ret; |
1643 | } | |
1644 | ||
1645 | stream->state = SDW_STREAM_ENABLED; | |
1646 | return 0; | |
1647 | } | |
1648 | ||
1649 | /** | |
1650 | * sdw_enable_stream() - Enable SoundWire stream | |
1651 | * | |
1652 | * @stream: Soundwire stream | |
1653 | * | |
34962fb8 | 1654 | * Documentation/driver-api/soundwire/stream.rst explains this API in detail |
5c3eb9f7 SK |
1655 | */ |
1656 | int sdw_enable_stream(struct sdw_stream_runtime *stream) | |
1657 | { | |
3a0be1a6 | 1658 | int ret; |
5c3eb9f7 SK |
1659 | |
1660 | if (!stream) { | |
17ed5bef | 1661 | pr_err("SoundWire: Handle not found for stream\n"); |
5c3eb9f7 SK |
1662 | return -EINVAL; |
1663 | } | |
1664 | ||
48949722 | 1665 | sdw_acquire_bus_lock(stream); |
5c3eb9f7 | 1666 | |
59528807 PLB |
1667 | if (stream->state != SDW_STREAM_PREPARED && |
1668 | stream->state != SDW_STREAM_DISABLED) { | |
1669 | pr_err("%s: %s: inconsistent state state %d\n", | |
1670 | __func__, stream->name, stream->state); | |
1671 | ret = -EINVAL; | |
1672 | goto state_err; | |
1673 | } | |
1674 | ||
5c3eb9f7 | 1675 | ret = _sdw_enable_stream(stream); |
5c3eb9f7 | 1676 | |
59528807 | 1677 | state_err: |
48949722 | 1678 | sdw_release_bus_lock(stream); |
5c3eb9f7 SK |
1679 | return ret; |
1680 | } | |
1681 | EXPORT_SYMBOL(sdw_enable_stream); | |
1682 | ||
1683 | static int _sdw_disable_stream(struct sdw_stream_runtime *stream) | |
1684 | { | |
3a0be1a6 | 1685 | struct sdw_master_runtime *m_rt; |
5c3eb9f7 SK |
1686 | int ret; |
1687 | ||
48949722 | 1688 | list_for_each_entry(m_rt, &stream->master_list, stream_node) { |
3a0be1a6 PLB |
1689 | struct sdw_bus *bus = m_rt->bus; |
1690 | ||
48949722 VK |
1691 | /* Disable port(s) */ |
1692 | ret = sdw_enable_disable_ports(m_rt, false); | |
1693 | if (ret < 0) { | |
17ed5bef | 1694 | dev_err(bus->dev, "Disable port(s) failed: %d\n", ret); |
48949722 VK |
1695 | return ret; |
1696 | } | |
5c3eb9f7 | 1697 | } |
5c3eb9f7 SK |
1698 | stream->state = SDW_STREAM_DISABLED; |
1699 | ||
48949722 | 1700 | list_for_each_entry(m_rt, &stream->master_list, stream_node) { |
3a0be1a6 PLB |
1701 | struct sdw_bus *bus = m_rt->bus; |
1702 | ||
48949722 | 1703 | /* Program params */ |
bfaa3549 | 1704 | ret = sdw_program_params(bus, false); |
48949722 | 1705 | if (ret < 0) { |
17ed5bef | 1706 | dev_err(bus->dev, "Program params failed: %d\n", ret); |
48949722 VK |
1707 | return ret; |
1708 | } | |
5c3eb9f7 SK |
1709 | } |
1710 | ||
e0279b6b PLB |
1711 | ret = do_bank_switch(stream); |
1712 | if (ret < 0) { | |
3a0be1a6 | 1713 | pr_err("Bank switch failed: %d\n", ret); |
e0279b6b PLB |
1714 | return ret; |
1715 | } | |
1716 | ||
1717 | /* make sure alternate bank (previous current) is also disabled */ | |
1718 | list_for_each_entry(m_rt, &stream->master_list, stream_node) { | |
3a0be1a6 PLB |
1719 | struct sdw_bus *bus = m_rt->bus; |
1720 | ||
e0279b6b PLB |
1721 | /* Disable port(s) */ |
1722 | ret = sdw_enable_disable_ports(m_rt, false); | |
1723 | if (ret < 0) { | |
1724 | dev_err(bus->dev, "Disable port(s) failed: %d\n", ret); | |
1725 | return ret; | |
1726 | } | |
1727 | } | |
1728 | ||
1729 | return 0; | |
5c3eb9f7 SK |
1730 | } |
1731 | ||
1732 | /** | |
1733 | * sdw_disable_stream() - Disable SoundWire stream | |
1734 | * | |
1735 | * @stream: Soundwire stream | |
1736 | * | |
34962fb8 | 1737 | * Documentation/driver-api/soundwire/stream.rst explains this API in detail |
5c3eb9f7 SK |
1738 | */ |
1739 | int sdw_disable_stream(struct sdw_stream_runtime *stream) | |
1740 | { | |
3a0be1a6 | 1741 | int ret; |
5c3eb9f7 SK |
1742 | |
1743 | if (!stream) { | |
17ed5bef | 1744 | pr_err("SoundWire: Handle not found for stream\n"); |
5c3eb9f7 SK |
1745 | return -EINVAL; |
1746 | } | |
1747 | ||
48949722 | 1748 | sdw_acquire_bus_lock(stream); |
5c3eb9f7 | 1749 | |
59528807 PLB |
1750 | if (stream->state != SDW_STREAM_ENABLED) { |
1751 | pr_err("%s: %s: inconsistent state state %d\n", | |
1752 | __func__, stream->name, stream->state); | |
1753 | ret = -EINVAL; | |
1754 | goto state_err; | |
1755 | } | |
1756 | ||
5c3eb9f7 | 1757 | ret = _sdw_disable_stream(stream); |
5c3eb9f7 | 1758 | |
59528807 | 1759 | state_err: |
48949722 | 1760 | sdw_release_bus_lock(stream); |
5c3eb9f7 SK |
1761 | return ret; |
1762 | } | |
1763 | EXPORT_SYMBOL(sdw_disable_stream); | |
1764 | ||
1765 | static int _sdw_deprepare_stream(struct sdw_stream_runtime *stream) | |
1766 | { | |
3a0be1a6 PLB |
1767 | struct sdw_master_runtime *m_rt; |
1768 | struct sdw_bus *bus; | |
5c3eb9f7 SK |
1769 | int ret = 0; |
1770 | ||
48949722 VK |
1771 | list_for_each_entry(m_rt, &stream->master_list, stream_node) { |
1772 | bus = m_rt->bus; | |
1773 | /* De-prepare port(s) */ | |
1774 | ret = sdw_prep_deprep_ports(m_rt, false); | |
1775 | if (ret < 0) { | |
62f0cec3 VK |
1776 | dev_err(bus->dev, |
1777 | "De-prepare port(s) failed: %d\n", ret); | |
48949722 VK |
1778 | return ret; |
1779 | } | |
5c3eb9f7 | 1780 | |
48949722 VK |
1781 | /* TODO: Update this during Device-Device support */ |
1782 | bus->params.bandwidth -= m_rt->stream->params.rate * | |
1783 | m_rt->ch_count * m_rt->stream->params.bps; | |
5c3eb9f7 | 1784 | |
48949722 | 1785 | /* Program params */ |
bfaa3549 | 1786 | ret = sdw_program_params(bus, false); |
48949722 | 1787 | if (ret < 0) { |
17ed5bef | 1788 | dev_err(bus->dev, "Program params failed: %d\n", ret); |
48949722 VK |
1789 | return ret; |
1790 | } | |
5c3eb9f7 SK |
1791 | } |
1792 | ||
48949722 | 1793 | stream->state = SDW_STREAM_DEPREPARED; |
5c3eb9f7 SK |
1794 | return do_bank_switch(stream); |
1795 | } | |
1796 | ||
1797 | /** | |
1798 | * sdw_deprepare_stream() - Deprepare SoundWire stream | |
1799 | * | |
1800 | * @stream: Soundwire stream | |
1801 | * | |
34962fb8 | 1802 | * Documentation/driver-api/soundwire/stream.rst explains this API in detail |
5c3eb9f7 SK |
1803 | */ |
1804 | int sdw_deprepare_stream(struct sdw_stream_runtime *stream) | |
1805 | { | |
3a0be1a6 | 1806 | int ret; |
5c3eb9f7 SK |
1807 | |
1808 | if (!stream) { | |
17ed5bef | 1809 | pr_err("SoundWire: Handle not found for stream\n"); |
5c3eb9f7 SK |
1810 | return -EINVAL; |
1811 | } | |
1812 | ||
48949722 | 1813 | sdw_acquire_bus_lock(stream); |
59528807 PLB |
1814 | |
1815 | if (stream->state != SDW_STREAM_PREPARED && | |
1816 | stream->state != SDW_STREAM_DISABLED) { | |
1817 | pr_err("%s: %s: inconsistent state state %d\n", | |
1818 | __func__, stream->name, stream->state); | |
1819 | ret = -EINVAL; | |
1820 | goto state_err; | |
1821 | } | |
1822 | ||
5c3eb9f7 | 1823 | ret = _sdw_deprepare_stream(stream); |
5c3eb9f7 | 1824 | |
59528807 | 1825 | state_err: |
48949722 | 1826 | sdw_release_bus_lock(stream); |
5c3eb9f7 SK |
1827 | return ret; |
1828 | } | |
1829 | EXPORT_SYMBOL(sdw_deprepare_stream); | |
4550569b PLB |
1830 | |
1831 | static int set_stream(struct snd_pcm_substream *substream, | |
1832 | struct sdw_stream_runtime *sdw_stream) | |
1833 | { | |
1834 | struct snd_soc_pcm_runtime *rtd = substream->private_data; | |
1835 | struct snd_soc_dai *dai; | |
1836 | int ret = 0; | |
1837 | int i; | |
1838 | ||
1839 | /* Set stream pointer on all DAIs */ | |
1840 | for_each_rtd_dais(rtd, i, dai) { | |
1841 | ret = snd_soc_dai_set_sdw_stream(dai, sdw_stream, substream->stream); | |
1842 | if (ret < 0) { | |
1843 | dev_err(rtd->dev, "failed to set stream pointer on dai %s", dai->name); | |
1844 | break; | |
1845 | } | |
1846 | } | |
1847 | ||
1848 | return ret; | |
1849 | } | |
1850 | ||
1851 | /** | |
1852 | * sdw_startup_stream() - Startup SoundWire stream | |
1853 | * | |
3b71c690 | 1854 | * @sdw_substream: Soundwire stream |
4550569b PLB |
1855 | * |
1856 | * Documentation/driver-api/soundwire/stream.rst explains this API in detail | |
1857 | */ | |
1858 | int sdw_startup_stream(void *sdw_substream) | |
1859 | { | |
1860 | struct snd_pcm_substream *substream = sdw_substream; | |
1861 | struct snd_soc_pcm_runtime *rtd = substream->private_data; | |
1862 | struct sdw_stream_runtime *sdw_stream; | |
1863 | char *name; | |
1864 | int ret; | |
1865 | ||
1866 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) | |
1867 | name = kasprintf(GFP_KERNEL, "%s-Playback", substream->name); | |
1868 | else | |
1869 | name = kasprintf(GFP_KERNEL, "%s-Capture", substream->name); | |
1870 | ||
1871 | if (!name) | |
1872 | return -ENOMEM; | |
1873 | ||
1874 | sdw_stream = sdw_alloc_stream(name); | |
1875 | if (!sdw_stream) { | |
1876 | dev_err(rtd->dev, "alloc stream failed for substream DAI %s", substream->name); | |
1877 | ret = -ENOMEM; | |
1878 | goto error; | |
1879 | } | |
1880 | ||
1881 | ret = set_stream(substream, sdw_stream); | |
1882 | if (ret < 0) | |
1883 | goto release_stream; | |
1884 | return 0; | |
1885 | ||
1886 | release_stream: | |
1887 | sdw_release_stream(sdw_stream); | |
1888 | set_stream(substream, NULL); | |
1889 | error: | |
1890 | kfree(name); | |
1891 | return ret; | |
1892 | } | |
1893 | EXPORT_SYMBOL(sdw_startup_stream); | |
1894 | ||
1895 | /** | |
1896 | * sdw_shutdown_stream() - Shutdown SoundWire stream | |
1897 | * | |
3b71c690 | 1898 | * @sdw_substream: Soundwire stream |
4550569b PLB |
1899 | * |
1900 | * Documentation/driver-api/soundwire/stream.rst explains this API in detail | |
1901 | */ | |
1902 | void sdw_shutdown_stream(void *sdw_substream) | |
1903 | { | |
1904 | struct snd_pcm_substream *substream = sdw_substream; | |
1905 | struct snd_soc_pcm_runtime *rtd = substream->private_data; | |
1906 | struct sdw_stream_runtime *sdw_stream; | |
1907 | struct snd_soc_dai *dai; | |
1908 | ||
1909 | /* Find stream from first CPU DAI */ | |
1910 | dai = asoc_rtd_to_cpu(rtd, 0); | |
1911 | ||
1912 | sdw_stream = snd_soc_dai_get_sdw_stream(dai, substream->stream); | |
1913 | ||
1914 | if (!sdw_stream) { | |
1915 | dev_err(rtd->dev, "no stream found for DAI %s", dai->name); | |
1916 | return; | |
1917 | } | |
1918 | ||
1919 | /* release memory */ | |
1920 | kfree(sdw_stream->name); | |
1921 | sdw_release_stream(sdw_stream); | |
1922 | ||
1923 | /* clear DAI data */ | |
1924 | set_stream(substream, NULL); | |
1925 | } | |
1926 | EXPORT_SYMBOL(sdw_shutdown_stream); |