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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}; | |
9026118f | 28 | EXPORT_SYMBOL(sdw_rows); |
99b8a5d6 | 29 | |
fe4b70f2 | 30 | int sdw_cols[SDW_FRAME_COLS] = {2, 4, 6, 8, 10, 12, 14, 16}; |
9026118f | 31 | EXPORT_SYMBOL(sdw_cols); |
99b8a5d6 | 32 | |
fe4b70f2 | 33 | int sdw_find_col_index(int col) |
99b8a5d6 SK |
34 | { |
35 | int i; | |
36 | ||
37 | for (i = 0; i < SDW_FRAME_COLS; i++) { | |
fe4b70f2 | 38 | if (sdw_cols[i] == col) |
99b8a5d6 SK |
39 | return i; |
40 | } | |
41 | ||
42 | pr_warn("Requested column not found, selecting lowest column no: 2\n"); | |
43 | return 0; | |
44 | } | |
fe4b70f2 | 45 | EXPORT_SYMBOL(sdw_find_col_index); |
99b8a5d6 | 46 | |
fe4b70f2 | 47 | int sdw_find_row_index(int row) |
99b8a5d6 SK |
48 | { |
49 | int i; | |
50 | ||
51 | for (i = 0; i < SDW_FRAME_ROWS; i++) { | |
fe4b70f2 | 52 | if (sdw_rows[i] == row) |
99b8a5d6 SK |
53 | return i; |
54 | } | |
55 | ||
56 | pr_warn("Requested row not found, selecting lowest row no: 48\n"); | |
57 | return 0; | |
58 | } | |
fe4b70f2 | 59 | EXPORT_SYMBOL(sdw_find_row_index); |
897fe40e | 60 | |
f8101c74 | 61 | static int _sdw_program_slave_port_params(struct sdw_bus *bus, |
1fe74a5e PLB |
62 | struct sdw_slave *slave, |
63 | struct sdw_transport_params *t_params, | |
64 | enum sdw_dpn_type type) | |
f8101c74 SK |
65 | { |
66 | u32 addr1, addr2, addr3, addr4; | |
67 | int ret; | |
68 | u16 wbuf; | |
69 | ||
70 | if (bus->params.next_bank) { | |
71 | addr1 = SDW_DPN_OFFSETCTRL2_B1(t_params->port_num); | |
72 | addr2 = SDW_DPN_BLOCKCTRL3_B1(t_params->port_num); | |
73 | addr3 = SDW_DPN_SAMPLECTRL2_B1(t_params->port_num); | |
74 | addr4 = SDW_DPN_HCTRL_B1(t_params->port_num); | |
75 | } else { | |
76 | addr1 = SDW_DPN_OFFSETCTRL2_B0(t_params->port_num); | |
77 | addr2 = SDW_DPN_BLOCKCTRL3_B0(t_params->port_num); | |
78 | addr3 = SDW_DPN_SAMPLECTRL2_B0(t_params->port_num); | |
79 | addr4 = SDW_DPN_HCTRL_B0(t_params->port_num); | |
80 | } | |
81 | ||
82 | /* Program DPN_OffsetCtrl2 registers */ | |
83 | ret = sdw_write(slave, addr1, t_params->offset2); | |
84 | if (ret < 0) { | |
17ed5bef | 85 | dev_err(bus->dev, "DPN_OffsetCtrl2 register write failed\n"); |
f8101c74 SK |
86 | return ret; |
87 | } | |
88 | ||
89 | /* Program DPN_BlockCtrl3 register */ | |
90 | ret = sdw_write(slave, addr2, t_params->blk_pkg_mode); | |
91 | if (ret < 0) { | |
17ed5bef | 92 | dev_err(bus->dev, "DPN_BlockCtrl3 register write failed\n"); |
f8101c74 SK |
93 | return ret; |
94 | } | |
95 | ||
96 | /* | |
97 | * Data ports are FULL, SIMPLE and REDUCED. This function handles | |
7d3b3cdf | 98 | * FULL and REDUCED only and beyond this point only FULL is |
f8101c74 SK |
99 | * handled, so bail out if we are not FULL data port type |
100 | */ | |
101 | if (type != SDW_DPN_FULL) | |
102 | return ret; | |
103 | ||
104 | /* Program DPN_SampleCtrl2 register */ | |
41ff9174 | 105 | wbuf = FIELD_GET(SDW_DPN_SAMPLECTRL_HIGH, t_params->sample_interval - 1); |
f8101c74 SK |
106 | |
107 | ret = sdw_write(slave, addr3, wbuf); | |
108 | if (ret < 0) { | |
17ed5bef | 109 | dev_err(bus->dev, "DPN_SampleCtrl2 register write failed\n"); |
f8101c74 SK |
110 | return ret; |
111 | } | |
112 | ||
113 | /* Program DPN_HCtrl register */ | |
41ff9174 VK |
114 | wbuf = FIELD_PREP(SDW_DPN_HCTRL_HSTART, t_params->hstart); |
115 | wbuf |= FIELD_PREP(SDW_DPN_HCTRL_HSTOP, t_params->hstop); | |
f8101c74 SK |
116 | |
117 | ret = sdw_write(slave, addr4, wbuf); | |
118 | if (ret < 0) | |
17ed5bef | 119 | dev_err(bus->dev, "DPN_HCtrl register write failed\n"); |
f8101c74 SK |
120 | |
121 | return ret; | |
122 | } | |
123 | ||
124 | static int sdw_program_slave_port_params(struct sdw_bus *bus, | |
1fe74a5e PLB |
125 | struct sdw_slave_runtime *s_rt, |
126 | struct sdw_port_runtime *p_rt) | |
f8101c74 SK |
127 | { |
128 | struct sdw_transport_params *t_params = &p_rt->transport_params; | |
129 | struct sdw_port_params *p_params = &p_rt->port_params; | |
130 | struct sdw_slave_prop *slave_prop = &s_rt->slave->prop; | |
131 | u32 addr1, addr2, addr3, addr4, addr5, addr6; | |
132 | struct sdw_dpn_prop *dpn_prop; | |
133 | int ret; | |
134 | u8 wbuf; | |
135 | ||
136 | dpn_prop = sdw_get_slave_dpn_prop(s_rt->slave, | |
1fe74a5e PLB |
137 | s_rt->direction, |
138 | t_params->port_num); | |
f8101c74 SK |
139 | if (!dpn_prop) |
140 | return -EINVAL; | |
141 | ||
142 | addr1 = SDW_DPN_PORTCTRL(t_params->port_num); | |
143 | addr2 = SDW_DPN_BLOCKCTRL1(t_params->port_num); | |
144 | ||
145 | if (bus->params.next_bank) { | |
146 | addr3 = SDW_DPN_SAMPLECTRL1_B1(t_params->port_num); | |
147 | addr4 = SDW_DPN_OFFSETCTRL1_B1(t_params->port_num); | |
148 | addr5 = SDW_DPN_BLOCKCTRL2_B1(t_params->port_num); | |
149 | addr6 = SDW_DPN_LANECTRL_B1(t_params->port_num); | |
150 | ||
151 | } else { | |
152 | addr3 = SDW_DPN_SAMPLECTRL1_B0(t_params->port_num); | |
153 | addr4 = SDW_DPN_OFFSETCTRL1_B0(t_params->port_num); | |
154 | addr5 = SDW_DPN_BLOCKCTRL2_B0(t_params->port_num); | |
155 | addr6 = SDW_DPN_LANECTRL_B0(t_params->port_num); | |
156 | } | |
157 | ||
158 | /* Program DPN_PortCtrl register */ | |
41ff9174 VK |
159 | wbuf = FIELD_PREP(SDW_DPN_PORTCTRL_DATAMODE, p_params->data_mode); |
160 | wbuf |= FIELD_PREP(SDW_DPN_PORTCTRL_FLOWMODE, p_params->flow_mode); | |
f8101c74 SK |
161 | |
162 | ret = sdw_update(s_rt->slave, addr1, 0xF, wbuf); | |
163 | if (ret < 0) { | |
164 | dev_err(&s_rt->slave->dev, | |
17ed5bef | 165 | "DPN_PortCtrl register write failed for port %d\n", |
f8101c74 SK |
166 | t_params->port_num); |
167 | return ret; | |
168 | } | |
169 | ||
a9107de4 SK |
170 | if (!dpn_prop->read_only_wordlength) { |
171 | /* Program DPN_BlockCtrl1 register */ | |
172 | ret = sdw_write(s_rt->slave, addr2, (p_params->bps - 1)); | |
173 | if (ret < 0) { | |
174 | dev_err(&s_rt->slave->dev, | |
175 | "DPN_BlockCtrl1 register write failed for port %d\n", | |
176 | t_params->port_num); | |
177 | return ret; | |
178 | } | |
f8101c74 SK |
179 | } |
180 | ||
181 | /* Program DPN_SampleCtrl1 register */ | |
182 | wbuf = (t_params->sample_interval - 1) & SDW_DPN_SAMPLECTRL_LOW; | |
183 | ret = sdw_write(s_rt->slave, addr3, wbuf); | |
184 | if (ret < 0) { | |
185 | dev_err(&s_rt->slave->dev, | |
17ed5bef | 186 | "DPN_SampleCtrl1 register write failed for port %d\n", |
f8101c74 SK |
187 | t_params->port_num); |
188 | return ret; | |
189 | } | |
190 | ||
191 | /* Program DPN_OffsetCtrl1 registers */ | |
192 | ret = sdw_write(s_rt->slave, addr4, t_params->offset1); | |
193 | if (ret < 0) { | |
194 | dev_err(&s_rt->slave->dev, | |
17ed5bef | 195 | "DPN_OffsetCtrl1 register write failed for port %d\n", |
f8101c74 SK |
196 | t_params->port_num); |
197 | return ret; | |
198 | } | |
199 | ||
200 | /* Program DPN_BlockCtrl2 register*/ | |
201 | if (t_params->blk_grp_ctrl_valid) { | |
202 | ret = sdw_write(s_rt->slave, addr5, t_params->blk_grp_ctrl); | |
203 | if (ret < 0) { | |
204 | dev_err(&s_rt->slave->dev, | |
17ed5bef | 205 | "DPN_BlockCtrl2 reg write failed for port %d\n", |
f8101c74 SK |
206 | t_params->port_num); |
207 | return ret; | |
208 | } | |
209 | } | |
210 | ||
211 | /* program DPN_LaneCtrl register */ | |
212 | if (slave_prop->lane_control_support) { | |
213 | ret = sdw_write(s_rt->slave, addr6, t_params->lane_ctrl); | |
214 | if (ret < 0) { | |
215 | dev_err(&s_rt->slave->dev, | |
17ed5bef | 216 | "DPN_LaneCtrl register write failed for port %d\n", |
f8101c74 SK |
217 | t_params->port_num); |
218 | return ret; | |
219 | } | |
220 | } | |
221 | ||
222 | if (dpn_prop->type != SDW_DPN_SIMPLE) { | |
223 | ret = _sdw_program_slave_port_params(bus, s_rt->slave, | |
1fe74a5e | 224 | t_params, dpn_prop->type); |
f8101c74 SK |
225 | if (ret < 0) |
226 | dev_err(&s_rt->slave->dev, | |
17ed5bef | 227 | "Transport reg write failed for port: %d\n", |
f8101c74 SK |
228 | t_params->port_num); |
229 | } | |
230 | ||
231 | return ret; | |
232 | } | |
233 | ||
234 | static int sdw_program_master_port_params(struct sdw_bus *bus, | |
1fe74a5e | 235 | struct sdw_port_runtime *p_rt) |
f8101c74 SK |
236 | { |
237 | int ret; | |
238 | ||
239 | /* | |
240 | * we need to set transport and port parameters for the port. | |
7d3b3cdf | 241 | * Transport parameters refers to the sample interval, offsets and |
f8101c74 SK |
242 | * hstart/stop etc of the data. Port parameters refers to word |
243 | * length, flow mode etc of the port | |
244 | */ | |
245 | ret = bus->port_ops->dpn_set_port_transport_params(bus, | |
246 | &p_rt->transport_params, | |
247 | bus->params.next_bank); | |
248 | if (ret < 0) | |
249 | return ret; | |
250 | ||
251 | return bus->port_ops->dpn_set_port_params(bus, | |
1fe74a5e PLB |
252 | &p_rt->port_params, |
253 | bus->params.next_bank); | |
f8101c74 SK |
254 | } |
255 | ||
256 | /** | |
257 | * sdw_program_port_params() - Programs transport parameters of Master(s) | |
258 | * and Slave(s) | |
259 | * | |
260 | * @m_rt: Master stream runtime | |
261 | */ | |
262 | static int sdw_program_port_params(struct sdw_master_runtime *m_rt) | |
263 | { | |
264 | struct sdw_slave_runtime *s_rt = NULL; | |
265 | struct sdw_bus *bus = m_rt->bus; | |
266 | struct sdw_port_runtime *p_rt; | |
267 | int ret = 0; | |
268 | ||
269 | /* Program transport & port parameters for Slave(s) */ | |
270 | list_for_each_entry(s_rt, &m_rt->slave_rt_list, m_rt_node) { | |
271 | list_for_each_entry(p_rt, &s_rt->port_list, port_node) { | |
272 | ret = sdw_program_slave_port_params(bus, s_rt, p_rt); | |
273 | if (ret < 0) | |
274 | return ret; | |
275 | } | |
276 | } | |
277 | ||
278 | /* Program transport & port parameters for Master(s) */ | |
279 | list_for_each_entry(p_rt, &m_rt->port_list, port_node) { | |
280 | ret = sdw_program_master_port_params(bus, p_rt); | |
281 | if (ret < 0) | |
282 | return ret; | |
283 | } | |
284 | ||
285 | return 0; | |
286 | } | |
287 | ||
79df15b7 SK |
288 | /** |
289 | * sdw_enable_disable_slave_ports: Enable/disable slave data port | |
290 | * | |
291 | * @bus: bus instance | |
292 | * @s_rt: slave runtime | |
293 | * @p_rt: port runtime | |
294 | * @en: enable or disable operation | |
295 | * | |
296 | * This function only sets the enable/disable bits in the relevant bank, the | |
297 | * actual enable/disable is done with a bank switch | |
298 | */ | |
299 | static int sdw_enable_disable_slave_ports(struct sdw_bus *bus, | |
1fe74a5e PLB |
300 | struct sdw_slave_runtime *s_rt, |
301 | struct sdw_port_runtime *p_rt, | |
302 | bool en) | |
79df15b7 SK |
303 | { |
304 | struct sdw_transport_params *t_params = &p_rt->transport_params; | |
305 | u32 addr; | |
306 | int ret; | |
307 | ||
308 | if (bus->params.next_bank) | |
309 | addr = SDW_DPN_CHANNELEN_B1(p_rt->num); | |
310 | else | |
311 | addr = SDW_DPN_CHANNELEN_B0(p_rt->num); | |
312 | ||
313 | /* | |
314 | * Since bus doesn't support sharing a port across two streams, | |
315 | * it is safe to reset this register | |
316 | */ | |
317 | if (en) | |
0b43fef9 | 318 | ret = sdw_write(s_rt->slave, addr, p_rt->ch_mask); |
79df15b7 | 319 | else |
0b43fef9 | 320 | ret = sdw_write(s_rt->slave, addr, 0x0); |
79df15b7 SK |
321 | |
322 | if (ret < 0) | |
323 | dev_err(&s_rt->slave->dev, | |
17ed5bef | 324 | "Slave chn_en reg write failed:%d port:%d\n", |
79df15b7 SK |
325 | ret, t_params->port_num); |
326 | ||
327 | return ret; | |
328 | } | |
329 | ||
330 | static int sdw_enable_disable_master_ports(struct sdw_master_runtime *m_rt, | |
1fe74a5e PLB |
331 | struct sdw_port_runtime *p_rt, |
332 | bool en) | |
79df15b7 SK |
333 | { |
334 | struct sdw_transport_params *t_params = &p_rt->transport_params; | |
335 | struct sdw_bus *bus = m_rt->bus; | |
336 | struct sdw_enable_ch enable_ch; | |
a25eab29 | 337 | int ret; |
79df15b7 SK |
338 | |
339 | enable_ch.port_num = p_rt->num; | |
340 | enable_ch.ch_mask = p_rt->ch_mask; | |
341 | enable_ch.enable = en; | |
342 | ||
343 | /* Perform Master port channel(s) enable/disable */ | |
344 | if (bus->port_ops->dpn_port_enable_ch) { | |
345 | ret = bus->port_ops->dpn_port_enable_ch(bus, | |
1fe74a5e PLB |
346 | &enable_ch, |
347 | bus->params.next_bank); | |
79df15b7 SK |
348 | if (ret < 0) { |
349 | dev_err(bus->dev, | |
17ed5bef | 350 | "Master chn_en write failed:%d port:%d\n", |
79df15b7 SK |
351 | ret, t_params->port_num); |
352 | return ret; | |
353 | } | |
354 | } else { | |
355 | dev_err(bus->dev, | |
356 | "dpn_port_enable_ch not supported, %s failed\n", | |
357 | en ? "enable" : "disable"); | |
358 | return -EINVAL; | |
359 | } | |
360 | ||
361 | return 0; | |
362 | } | |
363 | ||
364 | /** | |
365 | * sdw_enable_disable_ports() - Enable/disable port(s) for Master and | |
366 | * Slave(s) | |
367 | * | |
368 | * @m_rt: Master stream runtime | |
369 | * @en: mode (enable/disable) | |
370 | */ | |
371 | static int sdw_enable_disable_ports(struct sdw_master_runtime *m_rt, bool en) | |
372 | { | |
373 | struct sdw_port_runtime *s_port, *m_port; | |
3a0be1a6 | 374 | struct sdw_slave_runtime *s_rt; |
79df15b7 SK |
375 | int ret = 0; |
376 | ||
377 | /* Enable/Disable Slave port(s) */ | |
378 | list_for_each_entry(s_rt, &m_rt->slave_rt_list, m_rt_node) { | |
379 | list_for_each_entry(s_port, &s_rt->port_list, port_node) { | |
380 | ret = sdw_enable_disable_slave_ports(m_rt->bus, s_rt, | |
1fe74a5e | 381 | s_port, en); |
79df15b7 SK |
382 | if (ret < 0) |
383 | return ret; | |
384 | } | |
385 | } | |
386 | ||
387 | /* Enable/Disable Master port(s) */ | |
388 | list_for_each_entry(m_port, &m_rt->port_list, port_node) { | |
389 | ret = sdw_enable_disable_master_ports(m_rt, m_port, en); | |
390 | if (ret < 0) | |
391 | return ret; | |
392 | } | |
393 | ||
394 | return 0; | |
395 | } | |
396 | ||
397 | static int sdw_do_port_prep(struct sdw_slave_runtime *s_rt, | |
1fe74a5e PLB |
398 | struct sdw_prepare_ch prep_ch, |
399 | enum sdw_port_prep_ops cmd) | |
79df15b7 SK |
400 | { |
401 | const struct sdw_slave_ops *ops = s_rt->slave->ops; | |
402 | int ret; | |
403 | ||
404 | if (ops->port_prep) { | |
405 | ret = ops->port_prep(s_rt->slave, &prep_ch, cmd); | |
406 | if (ret < 0) { | |
407 | dev_err(&s_rt->slave->dev, | |
62f0cec3 VK |
408 | "Slave Port Prep cmd %d failed: %d\n", |
409 | cmd, ret); | |
79df15b7 SK |
410 | return ret; |
411 | } | |
412 | } | |
413 | ||
414 | return 0; | |
415 | } | |
416 | ||
417 | static int sdw_prep_deprep_slave_ports(struct sdw_bus *bus, | |
1fe74a5e PLB |
418 | struct sdw_slave_runtime *s_rt, |
419 | struct sdw_port_runtime *p_rt, | |
420 | bool prep) | |
79df15b7 | 421 | { |
3a0be1a6 | 422 | struct completion *port_ready; |
79df15b7 SK |
423 | struct sdw_dpn_prop *dpn_prop; |
424 | struct sdw_prepare_ch prep_ch; | |
425 | unsigned int time_left; | |
426 | bool intr = false; | |
427 | int ret = 0, val; | |
428 | u32 addr; | |
429 | ||
430 | prep_ch.num = p_rt->num; | |
431 | prep_ch.ch_mask = p_rt->ch_mask; | |
432 | ||
433 | dpn_prop = sdw_get_slave_dpn_prop(s_rt->slave, | |
1fe74a5e PLB |
434 | s_rt->direction, |
435 | prep_ch.num); | |
79df15b7 SK |
436 | if (!dpn_prop) { |
437 | dev_err(bus->dev, | |
17ed5bef | 438 | "Slave Port:%d properties not found\n", prep_ch.num); |
79df15b7 SK |
439 | return -EINVAL; |
440 | } | |
441 | ||
442 | prep_ch.prepare = prep; | |
443 | ||
444 | prep_ch.bank = bus->params.next_bank; | |
445 | ||
dd87a72a PLB |
446 | if (dpn_prop->imp_def_interrupts || !dpn_prop->simple_ch_prep_sm || |
447 | bus->params.s_data_mode != SDW_PORT_DATA_MODE_NORMAL) | |
79df15b7 SK |
448 | intr = true; |
449 | ||
450 | /* | |
451 | * Enable interrupt before Port prepare. | |
452 | * For Port de-prepare, it is assumed that port | |
453 | * was prepared earlier | |
454 | */ | |
455 | if (prep && intr) { | |
456 | ret = sdw_configure_dpn_intr(s_rt->slave, p_rt->num, prep, | |
8acbbfec | 457 | dpn_prop->imp_def_interrupts); |
79df15b7 SK |
458 | if (ret < 0) |
459 | return ret; | |
460 | } | |
461 | ||
462 | /* Inform slave about the impending port prepare */ | |
463 | sdw_do_port_prep(s_rt, prep_ch, SDW_OPS_PORT_PRE_PREP); | |
464 | ||
465 | /* Prepare Slave port implementing CP_SM */ | |
466 | if (!dpn_prop->simple_ch_prep_sm) { | |
467 | addr = SDW_DPN_PREPARECTRL(p_rt->num); | |
468 | ||
469 | if (prep) | |
0b43fef9 | 470 | ret = sdw_write(s_rt->slave, addr, p_rt->ch_mask); |
79df15b7 | 471 | else |
0b43fef9 | 472 | ret = sdw_write(s_rt->slave, addr, 0x0); |
79df15b7 SK |
473 | |
474 | if (ret < 0) { | |
475 | dev_err(&s_rt->slave->dev, | |
17ed5bef | 476 | "Slave prep_ctrl reg write failed\n"); |
79df15b7 SK |
477 | return ret; |
478 | } | |
479 | ||
480 | /* Wait for completion on port ready */ | |
481 | port_ready = &s_rt->slave->port_ready[prep_ch.num]; | |
482 | time_left = wait_for_completion_timeout(port_ready, | |
483 | msecs_to_jiffies(dpn_prop->ch_prep_timeout)); | |
484 | ||
485 | val = sdw_read(s_rt->slave, SDW_DPN_PREPARESTATUS(p_rt->num)); | |
486 | val &= p_rt->ch_mask; | |
487 | if (!time_left || val) { | |
488 | dev_err(&s_rt->slave->dev, | |
17ed5bef | 489 | "Chn prep failed for port:%d\n", prep_ch.num); |
79df15b7 SK |
490 | return -ETIMEDOUT; |
491 | } | |
492 | } | |
493 | ||
494 | /* Inform slaves about ports prepared */ | |
495 | sdw_do_port_prep(s_rt, prep_ch, SDW_OPS_PORT_POST_PREP); | |
496 | ||
497 | /* Disable interrupt after Port de-prepare */ | |
498 | if (!prep && intr) | |
499 | ret = sdw_configure_dpn_intr(s_rt->slave, p_rt->num, prep, | |
8acbbfec | 500 | dpn_prop->imp_def_interrupts); |
79df15b7 SK |
501 | |
502 | return ret; | |
503 | } | |
504 | ||
505 | static int sdw_prep_deprep_master_ports(struct sdw_master_runtime *m_rt, | |
1fe74a5e PLB |
506 | struct sdw_port_runtime *p_rt, |
507 | bool prep) | |
79df15b7 SK |
508 | { |
509 | struct sdw_transport_params *t_params = &p_rt->transport_params; | |
510 | struct sdw_bus *bus = m_rt->bus; | |
511 | const struct sdw_master_port_ops *ops = bus->port_ops; | |
512 | struct sdw_prepare_ch prep_ch; | |
513 | int ret = 0; | |
514 | ||
515 | prep_ch.num = p_rt->num; | |
516 | prep_ch.ch_mask = p_rt->ch_mask; | |
517 | prep_ch.prepare = prep; /* Prepare/De-prepare */ | |
518 | prep_ch.bank = bus->params.next_bank; | |
519 | ||
520 | /* Pre-prepare/Pre-deprepare port(s) */ | |
521 | if (ops->dpn_port_prep) { | |
522 | ret = ops->dpn_port_prep(bus, &prep_ch); | |
523 | if (ret < 0) { | |
17ed5bef | 524 | dev_err(bus->dev, "Port prepare failed for port:%d\n", |
1fe74a5e | 525 | t_params->port_num); |
79df15b7 SK |
526 | return ret; |
527 | } | |
528 | } | |
529 | ||
530 | return ret; | |
531 | } | |
532 | ||
533 | /** | |
534 | * sdw_prep_deprep_ports() - Prepare/De-prepare port(s) for Master(s) and | |
535 | * Slave(s) | |
536 | * | |
537 | * @m_rt: Master runtime handle | |
538 | * @prep: Prepare or De-prepare | |
539 | */ | |
540 | static int sdw_prep_deprep_ports(struct sdw_master_runtime *m_rt, bool prep) | |
541 | { | |
3a0be1a6 | 542 | struct sdw_slave_runtime *s_rt; |
79df15b7 SK |
543 | struct sdw_port_runtime *p_rt; |
544 | int ret = 0; | |
545 | ||
546 | /* Prepare/De-prepare Slave port(s) */ | |
547 | list_for_each_entry(s_rt, &m_rt->slave_rt_list, m_rt_node) { | |
548 | list_for_each_entry(p_rt, &s_rt->port_list, port_node) { | |
549 | ret = sdw_prep_deprep_slave_ports(m_rt->bus, s_rt, | |
1fe74a5e | 550 | p_rt, prep); |
79df15b7 SK |
551 | if (ret < 0) |
552 | return ret; | |
553 | } | |
554 | } | |
555 | ||
556 | /* Prepare/De-prepare Master port(s) */ | |
557 | list_for_each_entry(p_rt, &m_rt->port_list, port_node) { | |
558 | ret = sdw_prep_deprep_master_ports(m_rt, p_rt, prep); | |
559 | if (ret < 0) | |
560 | return ret; | |
561 | } | |
562 | ||
563 | return ret; | |
564 | } | |
565 | ||
99b8a5d6 SK |
566 | /** |
567 | * sdw_notify_config() - Notify bus configuration | |
568 | * | |
569 | * @m_rt: Master runtime handle | |
570 | * | |
571 | * This function notifies the Master(s) and Slave(s) of the | |
572 | * new bus configuration. | |
573 | */ | |
574 | static int sdw_notify_config(struct sdw_master_runtime *m_rt) | |
575 | { | |
576 | struct sdw_slave_runtime *s_rt; | |
577 | struct sdw_bus *bus = m_rt->bus; | |
578 | struct sdw_slave *slave; | |
579 | int ret = 0; | |
580 | ||
581 | if (bus->ops->set_bus_conf) { | |
582 | ret = bus->ops->set_bus_conf(bus, &bus->params); | |
583 | if (ret < 0) | |
584 | return ret; | |
585 | } | |
586 | ||
587 | list_for_each_entry(s_rt, &m_rt->slave_rt_list, m_rt_node) { | |
588 | slave = s_rt->slave; | |
589 | ||
590 | if (slave->ops->bus_config) { | |
591 | ret = slave->ops->bus_config(slave, &bus->params); | |
60835022 | 592 | if (ret < 0) { |
17ed5bef | 593 | dev_err(bus->dev, "Notify Slave: %d failed\n", |
1fe74a5e | 594 | slave->dev_num); |
60835022 RW |
595 | return ret; |
596 | } | |
99b8a5d6 SK |
597 | } |
598 | } | |
599 | ||
600 | return ret; | |
601 | } | |
602 | ||
603 | /** | |
604 | * sdw_program_params() - Program transport and port parameters for Master(s) | |
605 | * and Slave(s) | |
606 | * | |
607 | * @bus: SDW bus instance | |
bfaa3549 | 608 | * @prepare: true if sdw_program_params() is called by _prepare. |
99b8a5d6 | 609 | */ |
bfaa3549 | 610 | static int sdw_program_params(struct sdw_bus *bus, bool prepare) |
99b8a5d6 | 611 | { |
3a0be1a6 | 612 | struct sdw_master_runtime *m_rt; |
99b8a5d6 SK |
613 | int ret = 0; |
614 | ||
615 | list_for_each_entry(m_rt, &bus->m_rt_list, bus_node) { | |
bfaa3549 RW |
616 | |
617 | /* | |
618 | * this loop walks through all master runtimes for a | |
619 | * bus, but the ports can only be configured while | |
620 | * explicitly preparing a stream or handling an | |
621 | * already-prepared stream otherwise. | |
622 | */ | |
623 | if (!prepare && | |
624 | m_rt->stream->state == SDW_STREAM_CONFIGURED) | |
625 | continue; | |
626 | ||
99b8a5d6 SK |
627 | ret = sdw_program_port_params(m_rt); |
628 | if (ret < 0) { | |
629 | dev_err(bus->dev, | |
17ed5bef | 630 | "Program transport params failed: %d\n", ret); |
99b8a5d6 SK |
631 | return ret; |
632 | } | |
633 | ||
634 | ret = sdw_notify_config(m_rt); | |
635 | if (ret < 0) { | |
62f0cec3 VK |
636 | dev_err(bus->dev, |
637 | "Notify bus config failed: %d\n", ret); | |
99b8a5d6 SK |
638 | return ret; |
639 | } | |
640 | ||
641 | /* Enable port(s) on alternate bank for all active streams */ | |
642 | if (m_rt->stream->state != SDW_STREAM_ENABLED) | |
643 | continue; | |
644 | ||
645 | ret = sdw_enable_disable_ports(m_rt, true); | |
646 | if (ret < 0) { | |
17ed5bef | 647 | dev_err(bus->dev, "Enable channel failed: %d\n", ret); |
99b8a5d6 SK |
648 | return ret; |
649 | } | |
650 | } | |
651 | ||
652 | return ret; | |
653 | } | |
654 | ||
ce6e74d0 | 655 | static int sdw_bank_switch(struct sdw_bus *bus, int m_rt_count) |
99b8a5d6 SK |
656 | { |
657 | int col_index, row_index; | |
ce6e74d0 | 658 | bool multi_link; |
99b8a5d6 | 659 | struct sdw_msg *wr_msg; |
3a0be1a6 PLB |
660 | u8 *wbuf; |
661 | int ret; | |
99b8a5d6 SK |
662 | u16 addr; |
663 | ||
664 | wr_msg = kzalloc(sizeof(*wr_msg), GFP_KERNEL); | |
665 | if (!wr_msg) | |
666 | return -ENOMEM; | |
667 | ||
ce6e74d0 SN |
668 | bus->defer_msg.msg = wr_msg; |
669 | ||
99b8a5d6 SK |
670 | wbuf = kzalloc(sizeof(*wbuf), GFP_KERNEL); |
671 | if (!wbuf) { | |
672 | ret = -ENOMEM; | |
673 | goto error_1; | |
674 | } | |
675 | ||
676 | /* Get row and column index to program register */ | |
677 | col_index = sdw_find_col_index(bus->params.col); | |
678 | row_index = sdw_find_row_index(bus->params.row); | |
679 | wbuf[0] = col_index | (row_index << 3); | |
680 | ||
681 | if (bus->params.next_bank) | |
682 | addr = SDW_SCP_FRAMECTRL_B1; | |
683 | else | |
684 | addr = SDW_SCP_FRAMECTRL_B0; | |
685 | ||
686 | sdw_fill_msg(wr_msg, NULL, addr, 1, SDW_BROADCAST_DEV_NUM, | |
1fe74a5e | 687 | SDW_MSG_FLAG_WRITE, wbuf); |
99b8a5d6 SK |
688 | wr_msg->ssp_sync = true; |
689 | ||
ce6e74d0 SN |
690 | /* |
691 | * Set the multi_link flag only when both the hardware supports | |
063ff4e5 | 692 | * and hardware-based sync is required |
ce6e74d0 | 693 | */ |
063ff4e5 | 694 | multi_link = bus->multi_link && (m_rt_count >= bus->hw_sync_min_links); |
ce6e74d0 SN |
695 | |
696 | if (multi_link) | |
697 | ret = sdw_transfer_defer(bus, wr_msg, &bus->defer_msg); | |
698 | else | |
699 | ret = sdw_transfer(bus, wr_msg); | |
700 | ||
99b8a5d6 | 701 | if (ret < 0) { |
17ed5bef | 702 | dev_err(bus->dev, "Slave frame_ctrl reg write failed\n"); |
99b8a5d6 SK |
703 | goto error; |
704 | } | |
705 | ||
ce6e74d0 SN |
706 | if (!multi_link) { |
707 | kfree(wr_msg); | |
708 | kfree(wbuf); | |
709 | bus->defer_msg.msg = NULL; | |
710 | bus->params.curr_bank = !bus->params.curr_bank; | |
711 | bus->params.next_bank = !bus->params.next_bank; | |
712 | } | |
99b8a5d6 SK |
713 | |
714 | return 0; | |
715 | ||
716 | error: | |
717 | kfree(wbuf); | |
718 | error_1: | |
719 | kfree(wr_msg); | |
3fbbf214 | 720 | bus->defer_msg.msg = NULL; |
99b8a5d6 SK |
721 | return ret; |
722 | } | |
723 | ||
ce6e74d0 SN |
724 | /** |
725 | * sdw_ml_sync_bank_switch: Multilink register bank switch | |
726 | * | |
727 | * @bus: SDW bus instance | |
728 | * | |
729 | * Caller function should free the buffers on error | |
730 | */ | |
731 | static int sdw_ml_sync_bank_switch(struct sdw_bus *bus) | |
732 | { | |
733 | unsigned long time_left; | |
734 | ||
735 | if (!bus->multi_link) | |
736 | return 0; | |
737 | ||
738 | /* Wait for completion of transfer */ | |
739 | time_left = wait_for_completion_timeout(&bus->defer_msg.complete, | |
740 | bus->bank_switch_timeout); | |
741 | ||
742 | if (!time_left) { | |
17ed5bef | 743 | dev_err(bus->dev, "Controller Timed out on bank switch\n"); |
ce6e74d0 SN |
744 | return -ETIMEDOUT; |
745 | } | |
746 | ||
747 | bus->params.curr_bank = !bus->params.curr_bank; | |
748 | bus->params.next_bank = !bus->params.next_bank; | |
749 | ||
750 | if (bus->defer_msg.msg) { | |
751 | kfree(bus->defer_msg.msg->buf); | |
752 | kfree(bus->defer_msg.msg); | |
753 | } | |
754 | ||
755 | return 0; | |
756 | } | |
757 | ||
99b8a5d6 SK |
758 | static int do_bank_switch(struct sdw_stream_runtime *stream) |
759 | { | |
3a0be1a6 | 760 | struct sdw_master_runtime *m_rt; |
99b8a5d6 | 761 | const struct sdw_master_ops *ops; |
3a0be1a6 | 762 | struct sdw_bus *bus; |
ce6e74d0 | 763 | bool multi_link = false; |
063ff4e5 | 764 | int m_rt_count; |
99b8a5d6 SK |
765 | int ret = 0; |
766 | ||
063ff4e5 PLB |
767 | m_rt_count = stream->m_rt_count; |
768 | ||
48949722 VK |
769 | list_for_each_entry(m_rt, &stream->master_list, stream_node) { |
770 | bus = m_rt->bus; | |
771 | ops = bus->ops; | |
772 | ||
063ff4e5 | 773 | if (bus->multi_link && m_rt_count >= bus->hw_sync_min_links) { |
ce6e74d0 SN |
774 | multi_link = true; |
775 | mutex_lock(&bus->msg_lock); | |
776 | } | |
777 | ||
48949722 VK |
778 | /* Pre-bank switch */ |
779 | if (ops->pre_bank_switch) { | |
780 | ret = ops->pre_bank_switch(bus); | |
781 | if (ret < 0) { | |
782 | dev_err(bus->dev, | |
17ed5bef | 783 | "Pre bank switch op failed: %d\n", ret); |
ce6e74d0 | 784 | goto msg_unlock; |
48949722 VK |
785 | } |
786 | } | |
787 | ||
ce6e74d0 SN |
788 | /* |
789 | * Perform Bank switch operation. | |
790 | * For multi link cases, the actual bank switch is | |
791 | * synchronized across all Masters and happens later as a | |
792 | * part of post_bank_switch ops. | |
793 | */ | |
063ff4e5 | 794 | ret = sdw_bank_switch(bus, m_rt_count); |
99b8a5d6 | 795 | if (ret < 0) { |
17ed5bef | 796 | dev_err(bus->dev, "Bank switch failed: %d\n", ret); |
ce6e74d0 | 797 | goto error; |
99b8a5d6 SK |
798 | } |
799 | } | |
800 | ||
ce6e74d0 SN |
801 | /* |
802 | * For multi link cases, it is expected that the bank switch is | |
803 | * triggered by the post_bank_switch for the first Master in the list | |
804 | * and for the other Masters the post_bank_switch() should return doing | |
805 | * nothing. | |
806 | */ | |
48949722 VK |
807 | list_for_each_entry(m_rt, &stream->master_list, stream_node) { |
808 | bus = m_rt->bus; | |
809 | ops = bus->ops; | |
99b8a5d6 | 810 | |
48949722 VK |
811 | /* Post-bank switch */ |
812 | if (ops->post_bank_switch) { | |
813 | ret = ops->post_bank_switch(bus); | |
814 | if (ret < 0) { | |
815 | dev_err(bus->dev, | |
62f0cec3 VK |
816 | "Post bank switch op failed: %d\n", |
817 | ret); | |
ce6e74d0 | 818 | goto error; |
48949722 | 819 | } |
063ff4e5 | 820 | } else if (multi_link) { |
ce6e74d0 | 821 | dev_err(bus->dev, |
17ed5bef | 822 | "Post bank switch ops not implemented\n"); |
ce6e74d0 SN |
823 | goto error; |
824 | } | |
825 | ||
826 | /* Set the bank switch timeout to default, if not set */ | |
827 | if (!bus->bank_switch_timeout) | |
828 | bus->bank_switch_timeout = DEFAULT_BANK_SWITCH_TIMEOUT; | |
829 | ||
830 | /* Check if bank switch was successful */ | |
831 | ret = sdw_ml_sync_bank_switch(bus); | |
832 | if (ret < 0) { | |
833 | dev_err(bus->dev, | |
17ed5bef | 834 | "multi link bank switch failed: %d\n", ret); |
ce6e74d0 SN |
835 | goto error; |
836 | } | |
837 | ||
063ff4e5 | 838 | if (multi_link) |
9315d904 | 839 | mutex_unlock(&bus->msg_lock); |
ce6e74d0 SN |
840 | } |
841 | ||
842 | return ret; | |
843 | ||
844 | error: | |
845 | list_for_each_entry(m_rt, &stream->master_list, stream_node) { | |
ce6e74d0 | 846 | bus = m_rt->bus; |
3fbbf214 TR |
847 | if (bus->defer_msg.msg) { |
848 | kfree(bus->defer_msg.msg->buf); | |
849 | kfree(bus->defer_msg.msg); | |
850 | } | |
ce6e74d0 SN |
851 | } |
852 | ||
853 | msg_unlock: | |
854 | ||
855 | if (multi_link) { | |
856 | list_for_each_entry(m_rt, &stream->master_list, stream_node) { | |
857 | bus = m_rt->bus; | |
858 | if (mutex_is_locked(&bus->msg_lock)) | |
859 | mutex_unlock(&bus->msg_lock); | |
99b8a5d6 SK |
860 | } |
861 | } | |
862 | ||
863 | return ret; | |
864 | } | |
865 | ||
89e59053 SK |
866 | /** |
867 | * sdw_release_stream() - Free the assigned stream runtime | |
868 | * | |
869 | * @stream: SoundWire stream runtime | |
870 | * | |
871 | * sdw_release_stream should be called only once per stream | |
872 | */ | |
873 | void sdw_release_stream(struct sdw_stream_runtime *stream) | |
874 | { | |
875 | kfree(stream); | |
876 | } | |
877 | EXPORT_SYMBOL(sdw_release_stream); | |
878 | ||
879 | /** | |
880 | * sdw_alloc_stream() - Allocate and return stream runtime | |
881 | * | |
882 | * @stream_name: SoundWire stream name | |
883 | * | |
884 | * Allocates a SoundWire stream runtime instance. | |
885 | * sdw_alloc_stream should be called only once per stream. Typically | |
886 | * invoked from ALSA/ASoC machine/platform driver. | |
887 | */ | |
dfcff3f8 | 888 | struct sdw_stream_runtime *sdw_alloc_stream(const char *stream_name) |
89e59053 SK |
889 | { |
890 | struct sdw_stream_runtime *stream; | |
891 | ||
892 | stream = kzalloc(sizeof(*stream), GFP_KERNEL); | |
893 | if (!stream) | |
894 | return NULL; | |
895 | ||
896 | stream->name = stream_name; | |
0c4a1049 | 897 | INIT_LIST_HEAD(&stream->master_list); |
89e59053 | 898 | stream->state = SDW_STREAM_ALLOCATED; |
9b5c132a | 899 | stream->m_rt_count = 0; |
89e59053 SK |
900 | |
901 | return stream; | |
902 | } | |
903 | EXPORT_SYMBOL(sdw_alloc_stream); | |
904 | ||
48949722 VK |
905 | static struct sdw_master_runtime |
906 | *sdw_find_master_rt(struct sdw_bus *bus, | |
1fe74a5e | 907 | struct sdw_stream_runtime *stream) |
48949722 | 908 | { |
3a0be1a6 | 909 | struct sdw_master_runtime *m_rt; |
48949722 VK |
910 | |
911 | /* Retrieve Bus handle if already available */ | |
912 | list_for_each_entry(m_rt, &stream->master_list, stream_node) { | |
913 | if (m_rt->bus == bus) | |
914 | return m_rt; | |
915 | } | |
916 | ||
917 | return NULL; | |
918 | } | |
919 | ||
89e59053 SK |
920 | /** |
921 | * sdw_alloc_master_rt() - Allocates and initialize Master runtime handle | |
922 | * | |
923 | * @bus: SDW bus instance | |
924 | * @stream_config: Stream configuration | |
925 | * @stream: Stream runtime handle. | |
926 | * | |
927 | * This function is to be called with bus_lock held. | |
928 | */ | |
929 | static struct sdw_master_runtime | |
930 | *sdw_alloc_master_rt(struct sdw_bus *bus, | |
1fe74a5e PLB |
931 | struct sdw_stream_config *stream_config, |
932 | struct sdw_stream_runtime *stream) | |
89e59053 SK |
933 | { |
934 | struct sdw_master_runtime *m_rt; | |
935 | ||
89e59053 SK |
936 | /* |
937 | * check if Master is already allocated (as a result of Slave adding | |
938 | * it first), if so skip allocation and go to configure | |
939 | */ | |
48949722 | 940 | m_rt = sdw_find_master_rt(bus, stream); |
89e59053 SK |
941 | if (m_rt) |
942 | goto stream_config; | |
943 | ||
944 | m_rt = kzalloc(sizeof(*m_rt), GFP_KERNEL); | |
945 | if (!m_rt) | |
946 | return NULL; | |
947 | ||
948 | /* Initialization of Master runtime handle */ | |
bbe7379d | 949 | INIT_LIST_HEAD(&m_rt->port_list); |
89e59053 | 950 | INIT_LIST_HEAD(&m_rt->slave_rt_list); |
48949722 | 951 | list_add_tail(&m_rt->stream_node, &stream->master_list); |
89e59053 SK |
952 | |
953 | list_add_tail(&m_rt->bus_node, &bus->m_rt_list); | |
954 | ||
955 | stream_config: | |
956 | m_rt->ch_count = stream_config->ch_count; | |
957 | m_rt->bus = bus; | |
958 | m_rt->stream = stream; | |
959 | m_rt->direction = stream_config->direction; | |
960 | ||
961 | return m_rt; | |
962 | } | |
963 | ||
964 | /** | |
965 | * sdw_alloc_slave_rt() - Allocate and initialize Slave runtime handle. | |
966 | * | |
967 | * @slave: Slave handle | |
968 | * @stream_config: Stream configuration | |
969 | * @stream: Stream runtime handle | |
970 | * | |
971 | * This function is to be called with bus_lock held. | |
972 | */ | |
973 | static struct sdw_slave_runtime | |
974 | *sdw_alloc_slave_rt(struct sdw_slave *slave, | |
1fe74a5e PLB |
975 | struct sdw_stream_config *stream_config, |
976 | struct sdw_stream_runtime *stream) | |
89e59053 | 977 | { |
3a0be1a6 | 978 | struct sdw_slave_runtime *s_rt; |
89e59053 SK |
979 | |
980 | s_rt = kzalloc(sizeof(*s_rt), GFP_KERNEL); | |
981 | if (!s_rt) | |
982 | return NULL; | |
983 | ||
bbe7379d | 984 | INIT_LIST_HEAD(&s_rt->port_list); |
89e59053 SK |
985 | s_rt->ch_count = stream_config->ch_count; |
986 | s_rt->direction = stream_config->direction; | |
987 | s_rt->slave = slave; | |
988 | ||
989 | return s_rt; | |
990 | } | |
991 | ||
bbe7379d | 992 | static void sdw_master_port_release(struct sdw_bus *bus, |
1fe74a5e | 993 | struct sdw_master_runtime *m_rt) |
bbe7379d SK |
994 | { |
995 | struct sdw_port_runtime *p_rt, *_p_rt; | |
996 | ||
1fe74a5e | 997 | list_for_each_entry_safe(p_rt, _p_rt, &m_rt->port_list, port_node) { |
bbe7379d SK |
998 | list_del(&p_rt->port_node); |
999 | kfree(p_rt); | |
1000 | } | |
1001 | } | |
1002 | ||
1003 | static void sdw_slave_port_release(struct sdw_bus *bus, | |
1fe74a5e PLB |
1004 | struct sdw_slave *slave, |
1005 | struct sdw_stream_runtime *stream) | |
bbe7379d SK |
1006 | { |
1007 | struct sdw_port_runtime *p_rt, *_p_rt; | |
48949722 | 1008 | struct sdw_master_runtime *m_rt; |
bbe7379d SK |
1009 | struct sdw_slave_runtime *s_rt; |
1010 | ||
48949722 VK |
1011 | list_for_each_entry(m_rt, &stream->master_list, stream_node) { |
1012 | list_for_each_entry(s_rt, &m_rt->slave_rt_list, m_rt_node) { | |
48949722 VK |
1013 | if (s_rt->slave != slave) |
1014 | continue; | |
1015 | ||
1016 | list_for_each_entry_safe(p_rt, _p_rt, | |
1fe74a5e | 1017 | &s_rt->port_list, port_node) { |
48949722 VK |
1018 | list_del(&p_rt->port_node); |
1019 | kfree(p_rt); | |
1020 | } | |
bbe7379d SK |
1021 | } |
1022 | } | |
1023 | } | |
1024 | ||
89e59053 SK |
1025 | /** |
1026 | * sdw_release_slave_stream() - Free Slave(s) runtime handle | |
1027 | * | |
1028 | * @slave: Slave handle. | |
1029 | * @stream: Stream runtime handle. | |
1030 | * | |
1031 | * This function is to be called with bus_lock held. | |
1032 | */ | |
1033 | static void sdw_release_slave_stream(struct sdw_slave *slave, | |
1fe74a5e | 1034 | struct sdw_stream_runtime *stream) |
89e59053 SK |
1035 | { |
1036 | struct sdw_slave_runtime *s_rt, *_s_rt; | |
48949722 | 1037 | struct sdw_master_runtime *m_rt; |
89e59053 | 1038 | |
48949722 VK |
1039 | list_for_each_entry(m_rt, &stream->master_list, stream_node) { |
1040 | /* Retrieve Slave runtime handle */ | |
1041 | list_for_each_entry_safe(s_rt, _s_rt, | |
1fe74a5e | 1042 | &m_rt->slave_rt_list, m_rt_node) { |
48949722 VK |
1043 | if (s_rt->slave == slave) { |
1044 | list_del(&s_rt->m_rt_node); | |
1045 | kfree(s_rt); | |
1046 | return; | |
1047 | } | |
89e59053 SK |
1048 | } |
1049 | } | |
1050 | } | |
1051 | ||
1052 | /** | |
1053 | * sdw_release_master_stream() - Free Master runtime handle | |
1054 | * | |
48949722 | 1055 | * @m_rt: Master runtime node |
89e59053 SK |
1056 | * @stream: Stream runtime handle. |
1057 | * | |
1058 | * This function is to be called with bus_lock held | |
1059 | * It frees the Master runtime handle and associated Slave(s) runtime | |
1060 | * handle. If this is called first then sdw_release_slave_stream() will have | |
1061 | * no effect as Slave(s) runtime handle would already be freed up. | |
1062 | */ | |
48949722 | 1063 | static void sdw_release_master_stream(struct sdw_master_runtime *m_rt, |
1fe74a5e | 1064 | struct sdw_stream_runtime *stream) |
89e59053 | 1065 | { |
89e59053 SK |
1066 | struct sdw_slave_runtime *s_rt, *_s_rt; |
1067 | ||
8d6ccf5c SK |
1068 | list_for_each_entry_safe(s_rt, _s_rt, &m_rt->slave_rt_list, m_rt_node) { |
1069 | sdw_slave_port_release(s_rt->slave->bus, s_rt->slave, stream); | |
1070 | sdw_release_slave_stream(s_rt->slave, stream); | |
1071 | } | |
89e59053 | 1072 | |
48949722 | 1073 | list_del(&m_rt->stream_node); |
89e59053 | 1074 | list_del(&m_rt->bus_node); |
48949722 | 1075 | kfree(m_rt); |
89e59053 SK |
1076 | } |
1077 | ||
1078 | /** | |
1079 | * sdw_stream_remove_master() - Remove master from sdw_stream | |
1080 | * | |
1081 | * @bus: SDW Bus instance | |
1082 | * @stream: SoundWire stream | |
1083 | * | |
bbe7379d | 1084 | * This removes and frees port_rt and master_rt from a stream |
89e59053 SK |
1085 | */ |
1086 | int sdw_stream_remove_master(struct sdw_bus *bus, | |
1fe74a5e | 1087 | struct sdw_stream_runtime *stream) |
89e59053 | 1088 | { |
48949722 VK |
1089 | struct sdw_master_runtime *m_rt, *_m_rt; |
1090 | ||
89e59053 SK |
1091 | mutex_lock(&bus->bus_lock); |
1092 | ||
48949722 | 1093 | list_for_each_entry_safe(m_rt, _m_rt, |
1fe74a5e | 1094 | &stream->master_list, stream_node) { |
48949722 VK |
1095 | if (m_rt->bus != bus) |
1096 | continue; | |
1097 | ||
1098 | sdw_master_port_release(bus, m_rt); | |
1099 | sdw_release_master_stream(m_rt, stream); | |
ce6e74d0 | 1100 | stream->m_rt_count--; |
48949722 VK |
1101 | } |
1102 | ||
1103 | if (list_empty(&stream->master_list)) | |
1104 | stream->state = SDW_STREAM_RELEASED; | |
89e59053 SK |
1105 | |
1106 | mutex_unlock(&bus->bus_lock); | |
1107 | ||
1108 | return 0; | |
1109 | } | |
1110 | EXPORT_SYMBOL(sdw_stream_remove_master); | |
1111 | ||
1112 | /** | |
1113 | * sdw_stream_remove_slave() - Remove slave from sdw_stream | |
1114 | * | |
1115 | * @slave: SDW Slave instance | |
1116 | * @stream: SoundWire stream | |
1117 | * | |
bbe7379d | 1118 | * This removes and frees port_rt and slave_rt from a stream |
89e59053 SK |
1119 | */ |
1120 | int sdw_stream_remove_slave(struct sdw_slave *slave, | |
1fe74a5e | 1121 | struct sdw_stream_runtime *stream) |
89e59053 SK |
1122 | { |
1123 | mutex_lock(&slave->bus->bus_lock); | |
1124 | ||
bbe7379d | 1125 | sdw_slave_port_release(slave->bus, slave, stream); |
89e59053 SK |
1126 | sdw_release_slave_stream(slave, stream); |
1127 | ||
1128 | mutex_unlock(&slave->bus->bus_lock); | |
1129 | ||
1130 | return 0; | |
1131 | } | |
1132 | EXPORT_SYMBOL(sdw_stream_remove_slave); | |
1133 | ||
1134 | /** | |
1135 | * sdw_config_stream() - Configure the allocated stream | |
1136 | * | |
1137 | * @dev: SDW device | |
1138 | * @stream: SoundWire stream | |
1139 | * @stream_config: Stream configuration for audio stream | |
1140 | * @is_slave: is API called from Slave or Master | |
1141 | * | |
1142 | * This function is to be called with bus_lock held. | |
1143 | */ | |
1144 | static int sdw_config_stream(struct device *dev, | |
1fe74a5e PLB |
1145 | struct sdw_stream_runtime *stream, |
1146 | struct sdw_stream_config *stream_config, | |
1147 | bool is_slave) | |
89e59053 SK |
1148 | { |
1149 | /* | |
1150 | * Update the stream rate, channel and bps based on data | |
1151 | * source. For more than one data source (multilink), | |
1152 | * match the rate, bps, stream type and increment number of channels. | |
1153 | * | |
1154 | * If rate/bps is zero, it means the values are not set, so skip | |
1155 | * comparison and allow the value to be set and stored in stream | |
1156 | */ | |
1157 | if (stream->params.rate && | |
1fe74a5e | 1158 | stream->params.rate != stream_config->frame_rate) { |
17ed5bef | 1159 | dev_err(dev, "rate not matching, stream:%s\n", stream->name); |
89e59053 SK |
1160 | return -EINVAL; |
1161 | } | |
1162 | ||
1163 | if (stream->params.bps && | |
1fe74a5e | 1164 | stream->params.bps != stream_config->bps) { |
17ed5bef | 1165 | dev_err(dev, "bps not matching, stream:%s\n", stream->name); |
89e59053 SK |
1166 | return -EINVAL; |
1167 | } | |
1168 | ||
1169 | stream->type = stream_config->type; | |
1170 | stream->params.rate = stream_config->frame_rate; | |
1171 | stream->params.bps = stream_config->bps; | |
1172 | ||
1173 | /* TODO: Update this check during Device-device support */ | |
1174 | if (is_slave) | |
1175 | stream->params.ch_count += stream_config->ch_count; | |
1176 | ||
1177 | return 0; | |
1178 | } | |
1179 | ||
bbe7379d | 1180 | static int sdw_is_valid_port_range(struct device *dev, |
1fe74a5e | 1181 | struct sdw_port_runtime *p_rt) |
bbe7379d SK |
1182 | { |
1183 | if (!SDW_VALID_PORT_RANGE(p_rt->num)) { | |
1184 | dev_err(dev, | |
17ed5bef | 1185 | "SoundWire: Invalid port number :%d\n", p_rt->num); |
bbe7379d SK |
1186 | return -EINVAL; |
1187 | } | |
1188 | ||
1189 | return 0; | |
1190 | } | |
1191 | ||
1fe74a5e PLB |
1192 | static struct sdw_port_runtime |
1193 | *sdw_port_alloc(struct device *dev, | |
1194 | struct sdw_port_config *port_config, | |
1195 | int port_index) | |
bbe7379d SK |
1196 | { |
1197 | struct sdw_port_runtime *p_rt; | |
1198 | ||
1199 | p_rt = kzalloc(sizeof(*p_rt), GFP_KERNEL); | |
1200 | if (!p_rt) | |
1201 | return NULL; | |
1202 | ||
1203 | p_rt->ch_mask = port_config[port_index].ch_mask; | |
1204 | p_rt->num = port_config[port_index].num; | |
1205 | ||
1206 | return p_rt; | |
1207 | } | |
1208 | ||
1209 | static int sdw_master_port_config(struct sdw_bus *bus, | |
1fe74a5e PLB |
1210 | struct sdw_master_runtime *m_rt, |
1211 | struct sdw_port_config *port_config, | |
1212 | unsigned int num_ports) | |
bbe7379d SK |
1213 | { |
1214 | struct sdw_port_runtime *p_rt; | |
1215 | int i; | |
1216 | ||
1217 | /* Iterate for number of ports to perform initialization */ | |
1218 | for (i = 0; i < num_ports; i++) { | |
1219 | p_rt = sdw_port_alloc(bus->dev, port_config, i); | |
1220 | if (!p_rt) | |
1221 | return -ENOMEM; | |
1222 | ||
1223 | /* | |
1224 | * TODO: Check port capabilities for requested | |
1225 | * configuration (audio mode support) | |
1226 | */ | |
1227 | ||
1228 | list_add_tail(&p_rt->port_node, &m_rt->port_list); | |
1229 | } | |
1230 | ||
1231 | return 0; | |
1232 | } | |
1233 | ||
1234 | static int sdw_slave_port_config(struct sdw_slave *slave, | |
1fe74a5e PLB |
1235 | struct sdw_slave_runtime *s_rt, |
1236 | struct sdw_port_config *port_config, | |
1237 | unsigned int num_config) | |
bbe7379d SK |
1238 | { |
1239 | struct sdw_port_runtime *p_rt; | |
1240 | int i, ret; | |
1241 | ||
1242 | /* Iterate for number of ports to perform initialization */ | |
1243 | for (i = 0; i < num_config; i++) { | |
1244 | p_rt = sdw_port_alloc(&slave->dev, port_config, i); | |
1245 | if (!p_rt) | |
1246 | return -ENOMEM; | |
1247 | ||
1248 | /* | |
1249 | * TODO: Check valid port range as defined by DisCo/ | |
1250 | * slave | |
1251 | */ | |
1252 | ret = sdw_is_valid_port_range(&slave->dev, p_rt); | |
1253 | if (ret < 0) { | |
1254 | kfree(p_rt); | |
1255 | return ret; | |
1256 | } | |
1257 | ||
1258 | /* | |
1259 | * TODO: Check port capabilities for requested | |
1260 | * configuration (audio mode support) | |
1261 | */ | |
1262 | ||
1263 | list_add_tail(&p_rt->port_node, &s_rt->port_list); | |
1264 | } | |
1265 | ||
1266 | return 0; | |
1267 | } | |
1268 | ||
89e59053 SK |
1269 | /** |
1270 | * sdw_stream_add_master() - Allocate and add master runtime to a stream | |
1271 | * | |
1272 | * @bus: SDW Bus instance | |
1273 | * @stream_config: Stream configuration for audio stream | |
bbe7379d SK |
1274 | * @port_config: Port configuration for audio stream |
1275 | * @num_ports: Number of ports | |
89e59053 SK |
1276 | * @stream: SoundWire stream |
1277 | */ | |
1278 | int sdw_stream_add_master(struct sdw_bus *bus, | |
1fe74a5e PLB |
1279 | struct sdw_stream_config *stream_config, |
1280 | struct sdw_port_config *port_config, | |
1281 | unsigned int num_ports, | |
1282 | struct sdw_stream_runtime *stream) | |
89e59053 | 1283 | { |
3a0be1a6 | 1284 | struct sdw_master_runtime *m_rt; |
89e59053 SK |
1285 | int ret; |
1286 | ||
1287 | mutex_lock(&bus->bus_lock); | |
1288 | ||
ce6e74d0 SN |
1289 | /* |
1290 | * For multi link streams, add the second master only if | |
1291 | * the bus supports it. | |
1292 | * Check if bus->multi_link is set | |
1293 | */ | |
1294 | if (!bus->multi_link && stream->m_rt_count > 0) { | |
1295 | dev_err(bus->dev, | |
17ed5bef | 1296 | "Multilink not supported, link %d\n", bus->link_id); |
ce6e74d0 SN |
1297 | ret = -EINVAL; |
1298 | goto unlock; | |
1299 | } | |
1300 | ||
89e59053 SK |
1301 | m_rt = sdw_alloc_master_rt(bus, stream_config, stream); |
1302 | if (!m_rt) { | |
1303 | dev_err(bus->dev, | |
17ed5bef | 1304 | "Master runtime config failed for stream:%s\n", |
1fe74a5e | 1305 | stream->name); |
89e59053 | 1306 | ret = -ENOMEM; |
3fef1a22 | 1307 | goto unlock; |
89e59053 SK |
1308 | } |
1309 | ||
1310 | ret = sdw_config_stream(bus->dev, stream, stream_config, false); | |
1311 | if (ret) | |
1312 | goto stream_error; | |
1313 | ||
bbe7379d SK |
1314 | ret = sdw_master_port_config(bus, m_rt, port_config, num_ports); |
1315 | if (ret) | |
1316 | goto stream_error; | |
1317 | ||
ce6e74d0 SN |
1318 | stream->m_rt_count++; |
1319 | ||
3fef1a22 SN |
1320 | goto unlock; |
1321 | ||
89e59053 | 1322 | stream_error: |
48949722 | 1323 | sdw_release_master_stream(m_rt, stream); |
3fef1a22 | 1324 | unlock: |
89e59053 SK |
1325 | mutex_unlock(&bus->bus_lock); |
1326 | return ret; | |
1327 | } | |
1328 | EXPORT_SYMBOL(sdw_stream_add_master); | |
1329 | ||
1330 | /** | |
1331 | * sdw_stream_add_slave() - Allocate and add master/slave runtime to a stream | |
1332 | * | |
1333 | * @slave: SDW Slave instance | |
1334 | * @stream_config: Stream configuration for audio stream | |
1335 | * @stream: SoundWire stream | |
bbe7379d SK |
1336 | * @port_config: Port configuration for audio stream |
1337 | * @num_ports: Number of ports | |
0aebe40b SN |
1338 | * |
1339 | * It is expected that Slave is added before adding Master | |
1340 | * to the Stream. | |
1341 | * | |
89e59053 SK |
1342 | */ |
1343 | int sdw_stream_add_slave(struct sdw_slave *slave, | |
1fe74a5e PLB |
1344 | struct sdw_stream_config *stream_config, |
1345 | struct sdw_port_config *port_config, | |
1346 | unsigned int num_ports, | |
1347 | struct sdw_stream_runtime *stream) | |
89e59053 SK |
1348 | { |
1349 | struct sdw_slave_runtime *s_rt; | |
1350 | struct sdw_master_runtime *m_rt; | |
1351 | int ret; | |
1352 | ||
1353 | mutex_lock(&slave->bus->bus_lock); | |
1354 | ||
1355 | /* | |
1356 | * If this API is invoked by Slave first then m_rt is not valid. | |
1357 | * So, allocate m_rt and add Slave to it. | |
1358 | */ | |
1359 | m_rt = sdw_alloc_master_rt(slave->bus, stream_config, stream); | |
1360 | if (!m_rt) { | |
1361 | dev_err(&slave->dev, | |
17ed5bef | 1362 | "alloc master runtime failed for stream:%s\n", |
1fe74a5e | 1363 | stream->name); |
89e59053 SK |
1364 | ret = -ENOMEM; |
1365 | goto error; | |
1366 | } | |
1367 | ||
1368 | s_rt = sdw_alloc_slave_rt(slave, stream_config, stream); | |
1369 | if (!s_rt) { | |
1370 | dev_err(&slave->dev, | |
17ed5bef | 1371 | "Slave runtime config failed for stream:%s\n", |
1fe74a5e | 1372 | stream->name); |
89e59053 SK |
1373 | ret = -ENOMEM; |
1374 | goto stream_error; | |
1375 | } | |
1376 | ||
1377 | ret = sdw_config_stream(&slave->dev, stream, stream_config, true); | |
1378 | if (ret) | |
1379 | goto stream_error; | |
1380 | ||
1381 | list_add_tail(&s_rt->m_rt_node, &m_rt->slave_rt_list); | |
1382 | ||
bbe7379d SK |
1383 | ret = sdw_slave_port_config(slave, s_rt, port_config, num_ports); |
1384 | if (ret) | |
1385 | goto stream_error; | |
1386 | ||
0aebe40b SN |
1387 | /* |
1388 | * Change stream state to CONFIGURED on first Slave add. | |
1389 | * Bus is not aware of number of Slave(s) in a stream at this | |
1390 | * point so cannot depend on all Slave(s) to be added in order to | |
1391 | * change stream state to CONFIGURED. | |
1392 | */ | |
89e59053 SK |
1393 | stream->state = SDW_STREAM_CONFIGURED; |
1394 | goto error; | |
1395 | ||
1396 | stream_error: | |
1397 | /* | |
1398 | * we hit error so cleanup the stream, release all Slave(s) and | |
1399 | * Master runtime | |
1400 | */ | |
48949722 | 1401 | sdw_release_master_stream(m_rt, stream); |
89e59053 SK |
1402 | error: |
1403 | mutex_unlock(&slave->bus->bus_lock); | |
1404 | return ret; | |
1405 | } | |
1406 | EXPORT_SYMBOL(sdw_stream_add_slave); | |
f8101c74 SK |
1407 | |
1408 | /** | |
1409 | * sdw_get_slave_dpn_prop() - Get Slave port capabilities | |
1410 | * | |
1411 | * @slave: Slave handle | |
1412 | * @direction: Data direction. | |
1413 | * @port_num: Port number | |
1414 | */ | |
1415 | struct sdw_dpn_prop *sdw_get_slave_dpn_prop(struct sdw_slave *slave, | |
1fe74a5e PLB |
1416 | enum sdw_data_direction direction, |
1417 | unsigned int port_num) | |
f8101c74 SK |
1418 | { |
1419 | struct sdw_dpn_prop *dpn_prop; | |
1420 | u8 num_ports; | |
1421 | int i; | |
1422 | ||
1423 | if (direction == SDW_DATA_DIR_TX) { | |
1424 | num_ports = hweight32(slave->prop.source_ports); | |
1425 | dpn_prop = slave->prop.src_dpn_prop; | |
1426 | } else { | |
1427 | num_ports = hweight32(slave->prop.sink_ports); | |
1428 | dpn_prop = slave->prop.sink_dpn_prop; | |
1429 | } | |
1430 | ||
1431 | for (i = 0; i < num_ports; i++) { | |
03ecad90 | 1432 | if (dpn_prop[i].num == port_num) |
f8101c74 SK |
1433 | return &dpn_prop[i]; |
1434 | } | |
1435 | ||
1436 | return NULL; | |
1437 | } | |
5c3eb9f7 | 1438 | |
0c4a1049 SK |
1439 | /** |
1440 | * sdw_acquire_bus_lock: Acquire bus lock for all Master runtime(s) | |
1441 | * | |
1442 | * @stream: SoundWire stream | |
1443 | * | |
1444 | * Acquire bus_lock for each of the master runtime(m_rt) part of this | |
1445 | * stream to reconfigure the bus. | |
1446 | * NOTE: This function is called from SoundWire stream ops and is | |
1447 | * expected that a global lock is held before acquiring bus_lock. | |
1448 | */ | |
1449 | static void sdw_acquire_bus_lock(struct sdw_stream_runtime *stream) | |
1450 | { | |
3a0be1a6 | 1451 | struct sdw_master_runtime *m_rt; |
0c4a1049 SK |
1452 | struct sdw_bus *bus = NULL; |
1453 | ||
1454 | /* Iterate for all Master(s) in Master list */ | |
1455 | list_for_each_entry(m_rt, &stream->master_list, stream_node) { | |
1456 | bus = m_rt->bus; | |
1457 | ||
1458 | mutex_lock(&bus->bus_lock); | |
1459 | } | |
1460 | } | |
1461 | ||
1462 | /** | |
1463 | * sdw_release_bus_lock: Release bus lock for all Master runtime(s) | |
1464 | * | |
1465 | * @stream: SoundWire stream | |
1466 | * | |
1467 | * Release the previously held bus_lock after reconfiguring the bus. | |
48949722 VK |
1468 | * NOTE: This function is called from SoundWire stream ops and is |
1469 | * expected that a global lock is held before releasing bus_lock. | |
0c4a1049 SK |
1470 | */ |
1471 | static void sdw_release_bus_lock(struct sdw_stream_runtime *stream) | |
1472 | { | |
1473 | struct sdw_master_runtime *m_rt = NULL; | |
1474 | struct sdw_bus *bus = NULL; | |
1475 | ||
1476 | /* Iterate for all Master(s) in Master list */ | |
1477 | list_for_each_entry_reverse(m_rt, &stream->master_list, stream_node) { | |
1478 | bus = m_rt->bus; | |
1479 | mutex_unlock(&bus->bus_lock); | |
1480 | } | |
1481 | } | |
1482 | ||
c7a8f049 PLB |
1483 | static int _sdw_prepare_stream(struct sdw_stream_runtime *stream, |
1484 | bool update_params) | |
5c3eb9f7 | 1485 | { |
3a0be1a6 | 1486 | struct sdw_master_runtime *m_rt; |
48949722 | 1487 | struct sdw_bus *bus = NULL; |
3a0be1a6 | 1488 | struct sdw_master_prop *prop; |
5c3eb9f7 SK |
1489 | struct sdw_bus_params params; |
1490 | int ret; | |
1491 | ||
48949722 VK |
1492 | /* Prepare Master(s) and Slave(s) port(s) associated with stream */ |
1493 | list_for_each_entry(m_rt, &stream->master_list, stream_node) { | |
1494 | bus = m_rt->bus; | |
1495 | prop = &bus->prop; | |
1496 | memcpy(¶ms, &bus->params, sizeof(params)); | |
5c3eb9f7 | 1497 | |
48949722 | 1498 | /* TODO: Support Asynchronous mode */ |
3424305b | 1499 | if ((prop->max_clk_freq % stream->params.rate) != 0) { |
17ed5bef | 1500 | dev_err(bus->dev, "Async mode not supported\n"); |
48949722 VK |
1501 | return -EINVAL; |
1502 | } | |
5c3eb9f7 | 1503 | |
c7a8f049 PLB |
1504 | if (!update_params) |
1505 | goto program_params; | |
1506 | ||
48949722 VK |
1507 | /* Increment cumulative bus bandwidth */ |
1508 | /* TODO: Update this during Device-Device support */ | |
1509 | bus->params.bandwidth += m_rt->stream->params.rate * | |
1510 | m_rt->ch_count * m_rt->stream->params.bps; | |
1511 | ||
c7578c1d VK |
1512 | /* Compute params */ |
1513 | if (bus->compute_params) { | |
1514 | ret = bus->compute_params(bus); | |
1515 | if (ret < 0) { | |
1516 | dev_err(bus->dev, "Compute params failed: %d", | |
1517 | ret); | |
1518 | return ret; | |
1519 | } | |
1520 | } | |
1521 | ||
c7a8f049 | 1522 | program_params: |
48949722 | 1523 | /* Program params */ |
bfaa3549 | 1524 | ret = sdw_program_params(bus, true); |
48949722 | 1525 | if (ret < 0) { |
17ed5bef | 1526 | dev_err(bus->dev, "Program params failed: %d\n", ret); |
48949722 VK |
1527 | goto restore_params; |
1528 | } | |
5c3eb9f7 SK |
1529 | } |
1530 | ||
3a0be1a6 PLB |
1531 | if (!bus) { |
1532 | pr_err("Configuration error in %s\n", __func__); | |
1533 | return -EINVAL; | |
1534 | } | |
1535 | ||
5c3eb9f7 SK |
1536 | ret = do_bank_switch(stream); |
1537 | if (ret < 0) { | |
17ed5bef | 1538 | dev_err(bus->dev, "Bank switch failed: %d\n", ret); |
5c3eb9f7 SK |
1539 | goto restore_params; |
1540 | } | |
1541 | ||
48949722 VK |
1542 | list_for_each_entry(m_rt, &stream->master_list, stream_node) { |
1543 | bus = m_rt->bus; | |
1544 | ||
1545 | /* Prepare port(s) on the new clock configuration */ | |
1546 | ret = sdw_prep_deprep_ports(m_rt, true); | |
1547 | if (ret < 0) { | |
17ed5bef | 1548 | dev_err(bus->dev, "Prepare port(s) failed ret = %d\n", |
1fe74a5e | 1549 | ret); |
48949722 VK |
1550 | return ret; |
1551 | } | |
5c3eb9f7 SK |
1552 | } |
1553 | ||
1554 | stream->state = SDW_STREAM_PREPARED; | |
1555 | ||
1556 | return ret; | |
1557 | ||
1558 | restore_params: | |
1559 | memcpy(&bus->params, ¶ms, sizeof(params)); | |
1560 | return ret; | |
1561 | } | |
1562 | ||
1563 | /** | |
1564 | * sdw_prepare_stream() - Prepare SoundWire stream | |
1565 | * | |
1566 | * @stream: Soundwire stream | |
1567 | * | |
34962fb8 | 1568 | * Documentation/driver-api/soundwire/stream.rst explains this API in detail |
5c3eb9f7 SK |
1569 | */ |
1570 | int sdw_prepare_stream(struct sdw_stream_runtime *stream) | |
1571 | { | |
c7a8f049 | 1572 | bool update_params = true; |
c32464c9 | 1573 | int ret; |
5c3eb9f7 SK |
1574 | |
1575 | if (!stream) { | |
17ed5bef | 1576 | pr_err("SoundWire: Handle not found for stream\n"); |
5c3eb9f7 SK |
1577 | return -EINVAL; |
1578 | } | |
1579 | ||
48949722 | 1580 | sdw_acquire_bus_lock(stream); |
5c3eb9f7 | 1581 | |
c32464c9 BL |
1582 | if (stream->state == SDW_STREAM_PREPARED) { |
1583 | ret = 0; | |
1584 | goto state_err; | |
1585 | } | |
1586 | ||
59528807 PLB |
1587 | if (stream->state != SDW_STREAM_CONFIGURED && |
1588 | stream->state != SDW_STREAM_DEPREPARED && | |
1589 | stream->state != SDW_STREAM_DISABLED) { | |
1590 | pr_err("%s: %s: inconsistent state state %d\n", | |
1591 | __func__, stream->name, stream->state); | |
1592 | ret = -EINVAL; | |
1593 | goto state_err; | |
1594 | } | |
1595 | ||
c7a8f049 PLB |
1596 | /* |
1597 | * when the stream is DISABLED, this means sdw_prepare_stream() | |
1598 | * is called as a result of an underflow or a resume operation. | |
1599 | * In this case, the bus parameters shall not be recomputed, but | |
1600 | * still need to be re-applied | |
1601 | */ | |
1602 | if (stream->state == SDW_STREAM_DISABLED) | |
1603 | update_params = false; | |
1604 | ||
1605 | ret = _sdw_prepare_stream(stream, update_params); | |
5c3eb9f7 | 1606 | |
59528807 | 1607 | state_err: |
48949722 | 1608 | sdw_release_bus_lock(stream); |
5c3eb9f7 SK |
1609 | return ret; |
1610 | } | |
1611 | EXPORT_SYMBOL(sdw_prepare_stream); | |
1612 | ||
1613 | static int _sdw_enable_stream(struct sdw_stream_runtime *stream) | |
1614 | { | |
3a0be1a6 | 1615 | struct sdw_master_runtime *m_rt; |
48949722 | 1616 | struct sdw_bus *bus = NULL; |
5c3eb9f7 SK |
1617 | int ret; |
1618 | ||
48949722 VK |
1619 | /* Enable Master(s) and Slave(s) port(s) associated with stream */ |
1620 | list_for_each_entry(m_rt, &stream->master_list, stream_node) { | |
1621 | bus = m_rt->bus; | |
5c3eb9f7 | 1622 | |
48949722 | 1623 | /* Program params */ |
bfaa3549 | 1624 | ret = sdw_program_params(bus, false); |
48949722 | 1625 | if (ret < 0) { |
17ed5bef | 1626 | dev_err(bus->dev, "Program params failed: %d\n", ret); |
48949722 VK |
1627 | return ret; |
1628 | } | |
1629 | ||
1630 | /* Enable port(s) */ | |
1631 | ret = sdw_enable_disable_ports(m_rt, true); | |
1632 | if (ret < 0) { | |
62f0cec3 VK |
1633 | dev_err(bus->dev, |
1634 | "Enable port(s) failed ret: %d\n", ret); | |
48949722 VK |
1635 | return ret; |
1636 | } | |
5c3eb9f7 SK |
1637 | } |
1638 | ||
3a0be1a6 PLB |
1639 | if (!bus) { |
1640 | pr_err("Configuration error in %s\n", __func__); | |
1641 | return -EINVAL; | |
1642 | } | |
1643 | ||
5c3eb9f7 SK |
1644 | ret = do_bank_switch(stream); |
1645 | if (ret < 0) { | |
17ed5bef | 1646 | dev_err(bus->dev, "Bank switch failed: %d\n", ret); |
5c3eb9f7 SK |
1647 | return ret; |
1648 | } | |
1649 | ||
1650 | stream->state = SDW_STREAM_ENABLED; | |
1651 | return 0; | |
1652 | } | |
1653 | ||
1654 | /** | |
1655 | * sdw_enable_stream() - Enable SoundWire stream | |
1656 | * | |
1657 | * @stream: Soundwire stream | |
1658 | * | |
34962fb8 | 1659 | * Documentation/driver-api/soundwire/stream.rst explains this API in detail |
5c3eb9f7 SK |
1660 | */ |
1661 | int sdw_enable_stream(struct sdw_stream_runtime *stream) | |
1662 | { | |
3a0be1a6 | 1663 | int ret; |
5c3eb9f7 SK |
1664 | |
1665 | if (!stream) { | |
17ed5bef | 1666 | pr_err("SoundWire: Handle not found for stream\n"); |
5c3eb9f7 SK |
1667 | return -EINVAL; |
1668 | } | |
1669 | ||
48949722 | 1670 | sdw_acquire_bus_lock(stream); |
5c3eb9f7 | 1671 | |
59528807 PLB |
1672 | if (stream->state != SDW_STREAM_PREPARED && |
1673 | stream->state != SDW_STREAM_DISABLED) { | |
1674 | pr_err("%s: %s: inconsistent state state %d\n", | |
1675 | __func__, stream->name, stream->state); | |
1676 | ret = -EINVAL; | |
1677 | goto state_err; | |
1678 | } | |
1679 | ||
5c3eb9f7 | 1680 | ret = _sdw_enable_stream(stream); |
5c3eb9f7 | 1681 | |
59528807 | 1682 | state_err: |
48949722 | 1683 | sdw_release_bus_lock(stream); |
5c3eb9f7 SK |
1684 | return ret; |
1685 | } | |
1686 | EXPORT_SYMBOL(sdw_enable_stream); | |
1687 | ||
1688 | static int _sdw_disable_stream(struct sdw_stream_runtime *stream) | |
1689 | { | |
3a0be1a6 | 1690 | struct sdw_master_runtime *m_rt; |
5c3eb9f7 SK |
1691 | int ret; |
1692 | ||
48949722 | 1693 | list_for_each_entry(m_rt, &stream->master_list, stream_node) { |
3a0be1a6 PLB |
1694 | struct sdw_bus *bus = m_rt->bus; |
1695 | ||
48949722 VK |
1696 | /* Disable port(s) */ |
1697 | ret = sdw_enable_disable_ports(m_rt, false); | |
1698 | if (ret < 0) { | |
17ed5bef | 1699 | dev_err(bus->dev, "Disable port(s) failed: %d\n", ret); |
48949722 VK |
1700 | return ret; |
1701 | } | |
5c3eb9f7 | 1702 | } |
5c3eb9f7 SK |
1703 | stream->state = SDW_STREAM_DISABLED; |
1704 | ||
48949722 | 1705 | list_for_each_entry(m_rt, &stream->master_list, stream_node) { |
3a0be1a6 PLB |
1706 | struct sdw_bus *bus = m_rt->bus; |
1707 | ||
48949722 | 1708 | /* Program params */ |
bfaa3549 | 1709 | ret = sdw_program_params(bus, false); |
48949722 | 1710 | if (ret < 0) { |
17ed5bef | 1711 | dev_err(bus->dev, "Program params failed: %d\n", ret); |
48949722 VK |
1712 | return ret; |
1713 | } | |
5c3eb9f7 SK |
1714 | } |
1715 | ||
e0279b6b PLB |
1716 | ret = do_bank_switch(stream); |
1717 | if (ret < 0) { | |
3a0be1a6 | 1718 | pr_err("Bank switch failed: %d\n", ret); |
e0279b6b PLB |
1719 | return ret; |
1720 | } | |
1721 | ||
1722 | /* make sure alternate bank (previous current) is also disabled */ | |
1723 | list_for_each_entry(m_rt, &stream->master_list, stream_node) { | |
3a0be1a6 PLB |
1724 | struct sdw_bus *bus = m_rt->bus; |
1725 | ||
e0279b6b PLB |
1726 | /* Disable port(s) */ |
1727 | ret = sdw_enable_disable_ports(m_rt, false); | |
1728 | if (ret < 0) { | |
1729 | dev_err(bus->dev, "Disable port(s) failed: %d\n", ret); | |
1730 | return ret; | |
1731 | } | |
1732 | } | |
1733 | ||
1734 | return 0; | |
5c3eb9f7 SK |
1735 | } |
1736 | ||
1737 | /** | |
1738 | * sdw_disable_stream() - Disable SoundWire stream | |
1739 | * | |
1740 | * @stream: Soundwire stream | |
1741 | * | |
34962fb8 | 1742 | * Documentation/driver-api/soundwire/stream.rst explains this API in detail |
5c3eb9f7 SK |
1743 | */ |
1744 | int sdw_disable_stream(struct sdw_stream_runtime *stream) | |
1745 | { | |
3a0be1a6 | 1746 | int ret; |
5c3eb9f7 SK |
1747 | |
1748 | if (!stream) { | |
17ed5bef | 1749 | pr_err("SoundWire: Handle not found for stream\n"); |
5c3eb9f7 SK |
1750 | return -EINVAL; |
1751 | } | |
1752 | ||
48949722 | 1753 | sdw_acquire_bus_lock(stream); |
5c3eb9f7 | 1754 | |
59528807 PLB |
1755 | if (stream->state != SDW_STREAM_ENABLED) { |
1756 | pr_err("%s: %s: inconsistent state state %d\n", | |
1757 | __func__, stream->name, stream->state); | |
1758 | ret = -EINVAL; | |
1759 | goto state_err; | |
1760 | } | |
1761 | ||
5c3eb9f7 | 1762 | ret = _sdw_disable_stream(stream); |
5c3eb9f7 | 1763 | |
59528807 | 1764 | state_err: |
48949722 | 1765 | sdw_release_bus_lock(stream); |
5c3eb9f7 SK |
1766 | return ret; |
1767 | } | |
1768 | EXPORT_SYMBOL(sdw_disable_stream); | |
1769 | ||
1770 | static int _sdw_deprepare_stream(struct sdw_stream_runtime *stream) | |
1771 | { | |
3a0be1a6 PLB |
1772 | struct sdw_master_runtime *m_rt; |
1773 | struct sdw_bus *bus; | |
5c3eb9f7 SK |
1774 | int ret = 0; |
1775 | ||
48949722 VK |
1776 | list_for_each_entry(m_rt, &stream->master_list, stream_node) { |
1777 | bus = m_rt->bus; | |
1778 | /* De-prepare port(s) */ | |
1779 | ret = sdw_prep_deprep_ports(m_rt, false); | |
1780 | if (ret < 0) { | |
62f0cec3 VK |
1781 | dev_err(bus->dev, |
1782 | "De-prepare port(s) failed: %d\n", ret); | |
48949722 VK |
1783 | return ret; |
1784 | } | |
5c3eb9f7 | 1785 | |
48949722 VK |
1786 | /* TODO: Update this during Device-Device support */ |
1787 | bus->params.bandwidth -= m_rt->stream->params.rate * | |
1788 | m_rt->ch_count * m_rt->stream->params.bps; | |
5c3eb9f7 | 1789 | |
9026118f BL |
1790 | /* Compute params */ |
1791 | if (bus->compute_params) { | |
1792 | ret = bus->compute_params(bus); | |
1793 | if (ret < 0) { | |
1794 | dev_err(bus->dev, "Compute params failed: %d", | |
1795 | ret); | |
1796 | return ret; | |
1797 | } | |
1798 | } | |
1799 | ||
48949722 | 1800 | /* Program params */ |
bfaa3549 | 1801 | ret = sdw_program_params(bus, false); |
48949722 | 1802 | if (ret < 0) { |
17ed5bef | 1803 | dev_err(bus->dev, "Program params failed: %d\n", ret); |
48949722 VK |
1804 | return ret; |
1805 | } | |
5c3eb9f7 SK |
1806 | } |
1807 | ||
48949722 | 1808 | stream->state = SDW_STREAM_DEPREPARED; |
5c3eb9f7 SK |
1809 | return do_bank_switch(stream); |
1810 | } | |
1811 | ||
1812 | /** | |
1813 | * sdw_deprepare_stream() - Deprepare SoundWire stream | |
1814 | * | |
1815 | * @stream: Soundwire stream | |
1816 | * | |
34962fb8 | 1817 | * Documentation/driver-api/soundwire/stream.rst explains this API in detail |
5c3eb9f7 SK |
1818 | */ |
1819 | int sdw_deprepare_stream(struct sdw_stream_runtime *stream) | |
1820 | { | |
3a0be1a6 | 1821 | int ret; |
5c3eb9f7 SK |
1822 | |
1823 | if (!stream) { | |
17ed5bef | 1824 | pr_err("SoundWire: Handle not found for stream\n"); |
5c3eb9f7 SK |
1825 | return -EINVAL; |
1826 | } | |
1827 | ||
48949722 | 1828 | sdw_acquire_bus_lock(stream); |
59528807 PLB |
1829 | |
1830 | if (stream->state != SDW_STREAM_PREPARED && | |
1831 | stream->state != SDW_STREAM_DISABLED) { | |
1832 | pr_err("%s: %s: inconsistent state state %d\n", | |
1833 | __func__, stream->name, stream->state); | |
1834 | ret = -EINVAL; | |
1835 | goto state_err; | |
1836 | } | |
1837 | ||
5c3eb9f7 | 1838 | ret = _sdw_deprepare_stream(stream); |
5c3eb9f7 | 1839 | |
59528807 | 1840 | state_err: |
48949722 | 1841 | sdw_release_bus_lock(stream); |
5c3eb9f7 SK |
1842 | return ret; |
1843 | } | |
1844 | EXPORT_SYMBOL(sdw_deprepare_stream); | |
4550569b PLB |
1845 | |
1846 | static int set_stream(struct snd_pcm_substream *substream, | |
1847 | struct sdw_stream_runtime *sdw_stream) | |
1848 | { | |
1849 | struct snd_soc_pcm_runtime *rtd = substream->private_data; | |
1850 | struct snd_soc_dai *dai; | |
1851 | int ret = 0; | |
1852 | int i; | |
1853 | ||
1854 | /* Set stream pointer on all DAIs */ | |
1855 | for_each_rtd_dais(rtd, i, dai) { | |
1856 | ret = snd_soc_dai_set_sdw_stream(dai, sdw_stream, substream->stream); | |
1857 | if (ret < 0) { | |
1858 | dev_err(rtd->dev, "failed to set stream pointer on dai %s", dai->name); | |
1859 | break; | |
1860 | } | |
1861 | } | |
1862 | ||
1863 | return ret; | |
1864 | } | |
1865 | ||
1866 | /** | |
1867 | * sdw_startup_stream() - Startup SoundWire stream | |
1868 | * | |
3b71c690 | 1869 | * @sdw_substream: Soundwire stream |
4550569b PLB |
1870 | * |
1871 | * Documentation/driver-api/soundwire/stream.rst explains this API in detail | |
1872 | */ | |
1873 | int sdw_startup_stream(void *sdw_substream) | |
1874 | { | |
1875 | struct snd_pcm_substream *substream = sdw_substream; | |
1876 | struct snd_soc_pcm_runtime *rtd = substream->private_data; | |
1877 | struct sdw_stream_runtime *sdw_stream; | |
1878 | char *name; | |
1879 | int ret; | |
1880 | ||
1881 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) | |
1882 | name = kasprintf(GFP_KERNEL, "%s-Playback", substream->name); | |
1883 | else | |
1884 | name = kasprintf(GFP_KERNEL, "%s-Capture", substream->name); | |
1885 | ||
1886 | if (!name) | |
1887 | return -ENOMEM; | |
1888 | ||
1889 | sdw_stream = sdw_alloc_stream(name); | |
1890 | if (!sdw_stream) { | |
1891 | dev_err(rtd->dev, "alloc stream failed for substream DAI %s", substream->name); | |
1892 | ret = -ENOMEM; | |
1893 | goto error; | |
1894 | } | |
1895 | ||
1896 | ret = set_stream(substream, sdw_stream); | |
1897 | if (ret < 0) | |
1898 | goto release_stream; | |
1899 | return 0; | |
1900 | ||
1901 | release_stream: | |
1902 | sdw_release_stream(sdw_stream); | |
1903 | set_stream(substream, NULL); | |
1904 | error: | |
1905 | kfree(name); | |
1906 | return ret; | |
1907 | } | |
1908 | EXPORT_SYMBOL(sdw_startup_stream); | |
1909 | ||
1910 | /** | |
1911 | * sdw_shutdown_stream() - Shutdown SoundWire stream | |
1912 | * | |
3b71c690 | 1913 | * @sdw_substream: Soundwire stream |
4550569b PLB |
1914 | * |
1915 | * Documentation/driver-api/soundwire/stream.rst explains this API in detail | |
1916 | */ | |
1917 | void sdw_shutdown_stream(void *sdw_substream) | |
1918 | { | |
1919 | struct snd_pcm_substream *substream = sdw_substream; | |
1920 | struct snd_soc_pcm_runtime *rtd = substream->private_data; | |
1921 | struct sdw_stream_runtime *sdw_stream; | |
1922 | struct snd_soc_dai *dai; | |
1923 | ||
1924 | /* Find stream from first CPU DAI */ | |
1925 | dai = asoc_rtd_to_cpu(rtd, 0); | |
1926 | ||
1927 | sdw_stream = snd_soc_dai_get_sdw_stream(dai, substream->stream); | |
1928 | ||
3471d2a1 | 1929 | if (IS_ERR(sdw_stream)) { |
4550569b PLB |
1930 | dev_err(rtd->dev, "no stream found for DAI %s", dai->name); |
1931 | return; | |
1932 | } | |
1933 | ||
1934 | /* release memory */ | |
1935 | kfree(sdw_stream->name); | |
1936 | sdw_release_stream(sdw_stream); | |
1937 | ||
1938 | /* clear DAI data */ | |
1939 | set_stream(substream, NULL); | |
1940 | } | |
1941 | EXPORT_SYMBOL(sdw_shutdown_stream); |