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1// SPDX-License-Identifier: (GPL-2.0 OR BSD-3-Clause)
2/*
3 * SoundWire AMD Manager driver
4 *
5 * Copyright 2023-24 Advanced Micro Devices, Inc.
6 */
7
8#include <linux/completion.h>
9#include <linux/cleanup.h>
10#include <linux/device.h>
11#include <linux/io.h>
12#include <linux/jiffies.h>
13#include <linux/kernel.h>
14#include <linux/module.h>
15#include <linux/slab.h>
16#include <linux/soundwire/sdw.h>
17#include <linux/soundwire/sdw_registers.h>
18#include <linux/pm_runtime.h>
19#include <linux/wait.h>
20#include <sound/pcm_params.h>
21#include <sound/soc.h>
22#include "bus.h"
23#include "amd_init.h"
24#include "amd_manager.h"
25
26#define DRV_NAME "amd_sdw_manager"
27
28#define to_amd_sdw(b) container_of(b, struct amd_sdw_manager, bus)
29
30static int amd_init_sdw_manager(struct amd_sdw_manager *amd_manager)
31{
32 u32 val;
33 int ret;
34
35 writel(AMD_SDW_ENABLE, amd_manager->mmio + ACP_SW_EN);
36 ret = readl_poll_timeout(amd_manager->mmio + ACP_SW_EN_STATUS, val, val, ACP_DELAY_US,
37 AMD_SDW_TIMEOUT);
38 if (ret)
39 return ret;
40
41 /* SoundWire manager bus reset */
42 writel(AMD_SDW_BUS_RESET_REQ, amd_manager->mmio + ACP_SW_BUS_RESET_CTRL);
43 ret = readl_poll_timeout(amd_manager->mmio + ACP_SW_BUS_RESET_CTRL, val,
44 (val & AMD_SDW_BUS_RESET_DONE), ACP_DELAY_US, AMD_SDW_TIMEOUT);
45 if (ret)
46 return ret;
47
48 writel(AMD_SDW_BUS_RESET_CLEAR_REQ, amd_manager->mmio + ACP_SW_BUS_RESET_CTRL);
49 ret = readl_poll_timeout(amd_manager->mmio + ACP_SW_BUS_RESET_CTRL, val, !val,
50 ACP_DELAY_US, AMD_SDW_TIMEOUT);
51 if (ret) {
52 dev_err(amd_manager->dev, "Failed to reset SoundWire manager instance%d\n",
53 amd_manager->instance);
54 return ret;
55 }
56
57 writel(AMD_SDW_DISABLE, amd_manager->mmio + ACP_SW_EN);
58 return readl_poll_timeout(amd_manager->mmio + ACP_SW_EN_STATUS, val, !val, ACP_DELAY_US,
59 AMD_SDW_TIMEOUT);
60}
61
62static int amd_enable_sdw_manager(struct amd_sdw_manager *amd_manager)
63{
64 u32 val;
65
66 writel(AMD_SDW_ENABLE, amd_manager->mmio + ACP_SW_EN);
67 return readl_poll_timeout(amd_manager->mmio + ACP_SW_EN_STATUS, val, val, ACP_DELAY_US,
68 AMD_SDW_TIMEOUT);
69}
70
71static int amd_disable_sdw_manager(struct amd_sdw_manager *amd_manager)
72{
73 u32 val;
74
75 writel(AMD_SDW_DISABLE, amd_manager->mmio + ACP_SW_EN);
76 /*
77 * After invoking manager disable sequence, check whether
78 * manager has executed clock stop sequence. In this case,
79 * manager should ignore checking enable status register.
80 */
81 val = readl(amd_manager->mmio + ACP_SW_CLK_RESUME_CTRL);
82 if (val)
83 return 0;
84 return readl_poll_timeout(amd_manager->mmio + ACP_SW_EN_STATUS, val, !val, ACP_DELAY_US,
85 AMD_SDW_TIMEOUT);
86}
87
88static void amd_enable_sdw_interrupts(struct amd_sdw_manager *amd_manager)
89{
90 u32 val;
91
92 mutex_lock(amd_manager->acp_sdw_lock);
93 val = sdw_manager_reg_mask_array[amd_manager->instance];
94 amd_updatel(amd_manager->acp_mmio, ACP_EXTERNAL_INTR_CNTL(amd_manager->instance), val, val);
95 mutex_unlock(amd_manager->acp_sdw_lock);
96
97 writel(AMD_SDW_IRQ_MASK_0TO7, amd_manager->mmio +
98 ACP_SW_STATE_CHANGE_STATUS_MASK_0TO7);
99 writel(AMD_SDW_IRQ_MASK_8TO11, amd_manager->mmio +
100 ACP_SW_STATE_CHANGE_STATUS_MASK_8TO11);
101 writel(AMD_SDW_IRQ_ERROR_MASK, amd_manager->mmio + ACP_SW_ERROR_INTR_MASK);
102}
103
104static void amd_disable_sdw_interrupts(struct amd_sdw_manager *amd_manager)
105{
106 u32 irq_mask;
107
108 mutex_lock(amd_manager->acp_sdw_lock);
109 irq_mask = sdw_manager_reg_mask_array[amd_manager->instance];
110 amd_updatel(amd_manager->acp_mmio, ACP_EXTERNAL_INTR_CNTL(amd_manager->instance),
111 irq_mask, 0);
112 mutex_unlock(amd_manager->acp_sdw_lock);
113
114 writel(0x00, amd_manager->mmio + ACP_SW_STATE_CHANGE_STATUS_MASK_0TO7);
115 writel(0x00, amd_manager->mmio + ACP_SW_STATE_CHANGE_STATUS_MASK_8TO11);
116 writel(0x00, amd_manager->mmio + ACP_SW_ERROR_INTR_MASK);
117}
118
119static int amd_deinit_sdw_manager(struct amd_sdw_manager *amd_manager)
120{
121 amd_disable_sdw_interrupts(amd_manager);
122 return amd_disable_sdw_manager(amd_manager);
123}
124
125static void amd_sdw_set_frameshape(struct amd_sdw_manager *amd_manager)
126{
127 u32 frame_size;
128
129 frame_size = (amd_manager->rows_index << 3) | amd_manager->cols_index;
130 writel(frame_size, amd_manager->mmio + ACP_SW_FRAMESIZE);
131}
132
133static void amd_sdw_wake_enable(struct amd_sdw_manager *amd_manager, bool enable)
134{
135 u32 wake_ctrl;
136
137 wake_ctrl = readl(amd_manager->mmio + ACP_SW_STATE_CHANGE_STATUS_MASK_8TO11);
138 if (enable)
139 wake_ctrl |= AMD_SDW_WAKE_INTR_MASK;
140 else
141 wake_ctrl &= ~AMD_SDW_WAKE_INTR_MASK;
142
143 writel(wake_ctrl, amd_manager->mmio + ACP_SW_STATE_CHANGE_STATUS_MASK_8TO11);
144}
145
146static void amd_sdw_ctl_word_prep(u32 *lower_word, u32 *upper_word, struct sdw_msg *msg,
147 int cmd_offset)
148{
149 u32 upper_data;
150 u32 lower_data = 0;
151 u16 addr;
152 u8 upper_addr, lower_addr;
153 u8 data = 0;
154
155 addr = msg->addr + cmd_offset;
156 upper_addr = (addr & 0xFF00) >> 8;
157 lower_addr = addr & 0xFF;
158
159 if (msg->flags == SDW_MSG_FLAG_WRITE)
160 data = msg->buf[cmd_offset];
161
162 upper_data = FIELD_PREP(AMD_SDW_MCP_CMD_DEV_ADDR, msg->dev_num);
163 upper_data |= FIELD_PREP(AMD_SDW_MCP_CMD_COMMAND, msg->flags + 2);
164 upper_data |= FIELD_PREP(AMD_SDW_MCP_CMD_REG_ADDR_HIGH, upper_addr);
165 lower_data |= FIELD_PREP(AMD_SDW_MCP_CMD_REG_ADDR_LOW, lower_addr);
166 lower_data |= FIELD_PREP(AMD_SDW_MCP_CMD_REG_DATA, data);
167
168 *upper_word = upper_data;
169 *lower_word = lower_data;
170}
171
172static u64 amd_sdw_send_cmd_get_resp(struct amd_sdw_manager *amd_manager, u32 lower_data,
173 u32 upper_data)
174{
175 u64 resp;
176 u32 lower_resp, upper_resp;
177 u32 sts;
178 int ret;
179
180 ret = readl_poll_timeout(amd_manager->mmio + ACP_SW_IMM_CMD_STS, sts,
181 !(sts & AMD_SDW_IMM_CMD_BUSY), ACP_DELAY_US, AMD_SDW_TIMEOUT);
182 if (ret) {
183 dev_err(amd_manager->dev, "SDW%x previous cmd status clear failed\n",
184 amd_manager->instance);
185 return ret;
186 }
187
188 if (sts & AMD_SDW_IMM_RES_VALID) {
189 dev_err(amd_manager->dev, "SDW%x manager is in bad state\n", amd_manager->instance);
190 writel(0x00, amd_manager->mmio + ACP_SW_IMM_CMD_STS);
191 }
192 writel(upper_data, amd_manager->mmio + ACP_SW_IMM_CMD_UPPER_WORD);
193 writel(lower_data, amd_manager->mmio + ACP_SW_IMM_CMD_LOWER_QWORD);
194
195 ret = readl_poll_timeout(amd_manager->mmio + ACP_SW_IMM_CMD_STS, sts,
196 (sts & AMD_SDW_IMM_RES_VALID), ACP_DELAY_US, AMD_SDW_TIMEOUT);
197 if (ret) {
198 dev_err(amd_manager->dev, "SDW%x cmd response timeout occurred\n",
199 amd_manager->instance);
200 return ret;
201 }
202 upper_resp = readl(amd_manager->mmio + ACP_SW_IMM_RESP_UPPER_WORD);
203 lower_resp = readl(amd_manager->mmio + ACP_SW_IMM_RESP_LOWER_QWORD);
204
205 writel(AMD_SDW_IMM_RES_VALID, amd_manager->mmio + ACP_SW_IMM_CMD_STS);
206 ret = readl_poll_timeout(amd_manager->mmio + ACP_SW_IMM_CMD_STS, sts,
207 !(sts & AMD_SDW_IMM_RES_VALID), ACP_DELAY_US, AMD_SDW_TIMEOUT);
208 if (ret) {
209 dev_err(amd_manager->dev, "SDW%x cmd status retry failed\n",
210 amd_manager->instance);
211 return ret;
212 }
213 resp = upper_resp;
214 resp = (resp << 32) | lower_resp;
215 return resp;
216}
217
218static enum sdw_command_response
219amd_program_scp_addr(struct amd_sdw_manager *amd_manager, struct sdw_msg *msg)
220{
221 struct sdw_msg scp_msg = {0};
222 u64 response_buf[2] = {0};
223 u32 upper_data = 0, lower_data = 0;
224 int index;
225
226 scp_msg.dev_num = msg->dev_num;
227 scp_msg.addr = SDW_SCP_ADDRPAGE1;
228 scp_msg.buf = &msg->addr_page1;
229 scp_msg.flags = SDW_MSG_FLAG_WRITE;
230 amd_sdw_ctl_word_prep(&lower_data, &upper_data, &scp_msg, 0);
231 response_buf[0] = amd_sdw_send_cmd_get_resp(amd_manager, lower_data, upper_data);
232 scp_msg.addr = SDW_SCP_ADDRPAGE2;
233 scp_msg.buf = &msg->addr_page2;
234 amd_sdw_ctl_word_prep(&lower_data, &upper_data, &scp_msg, 0);
235 response_buf[1] = amd_sdw_send_cmd_get_resp(amd_manager, lower_data, upper_data);
236
237 for (index = 0; index < 2; index++) {
238 if (response_buf[index] == -ETIMEDOUT) {
239 dev_err_ratelimited(amd_manager->dev,
240 "SCP_addrpage command timeout for Slave %d\n",
241 msg->dev_num);
242 return SDW_CMD_TIMEOUT;
243 } else if (!(response_buf[index] & AMD_SDW_MCP_RESP_ACK)) {
244 if (response_buf[index] & AMD_SDW_MCP_RESP_NACK) {
245 dev_err_ratelimited(amd_manager->dev,
246 "SCP_addrpage NACKed for Slave %d\n",
247 msg->dev_num);
248 return SDW_CMD_FAIL;
249 }
250 dev_dbg_ratelimited(amd_manager->dev, "SCP_addrpage ignored for Slave %d\n",
251 msg->dev_num);
252 return SDW_CMD_IGNORED;
253 }
254 }
255 return SDW_CMD_OK;
256}
257
258static int amd_prep_msg(struct amd_sdw_manager *amd_manager, struct sdw_msg *msg)
259{
260 int ret;
261
262 if (msg->page) {
263 ret = amd_program_scp_addr(amd_manager, msg);
264 if (ret) {
265 msg->len = 0;
266 return ret;
267 }
268 }
269 switch (msg->flags) {
270 case SDW_MSG_FLAG_READ:
271 case SDW_MSG_FLAG_WRITE:
272 break;
273 default:
274 dev_err(amd_manager->dev, "Invalid msg cmd: %d\n", msg->flags);
275 return -EINVAL;
276 }
277 return 0;
278}
279
280static enum sdw_command_response amd_sdw_fill_msg_resp(struct amd_sdw_manager *amd_manager,
281 struct sdw_msg *msg, u64 response,
282 int offset)
283{
284 if (response & AMD_SDW_MCP_RESP_ACK) {
285 if (msg->flags == SDW_MSG_FLAG_READ)
286 msg->buf[offset] = FIELD_GET(AMD_SDW_MCP_RESP_RDATA, response);
287 } else {
288 if (response == -ETIMEDOUT) {
289 dev_err_ratelimited(amd_manager->dev, "command timeout for Slave %d\n",
290 msg->dev_num);
291 return SDW_CMD_TIMEOUT;
292 } else if (response & AMD_SDW_MCP_RESP_NACK) {
293 dev_err_ratelimited(amd_manager->dev,
294 "command response NACK received for Slave %d\n",
295 msg->dev_num);
296 return SDW_CMD_FAIL;
297 }
298 dev_err_ratelimited(amd_manager->dev, "command is ignored for Slave %d\n",
299 msg->dev_num);
300 return SDW_CMD_IGNORED;
301 }
302 return SDW_CMD_OK;
303}
304
305static unsigned int _amd_sdw_xfer_msg(struct amd_sdw_manager *amd_manager, struct sdw_msg *msg,
306 int cmd_offset)
307{
308 u64 response;
309 u32 upper_data = 0, lower_data = 0;
310
311 amd_sdw_ctl_word_prep(&lower_data, &upper_data, msg, cmd_offset);
312 response = amd_sdw_send_cmd_get_resp(amd_manager, lower_data, upper_data);
313 return amd_sdw_fill_msg_resp(amd_manager, msg, response, cmd_offset);
314}
315
316static enum sdw_command_response amd_sdw_xfer_msg(struct sdw_bus *bus, struct sdw_msg *msg)
317{
318 struct amd_sdw_manager *amd_manager = to_amd_sdw(bus);
319 int ret, i;
320
321 ret = amd_prep_msg(amd_manager, msg);
322 if (ret)
323 return SDW_CMD_FAIL_OTHER;
324 for (i = 0; i < msg->len; i++) {
325 ret = _amd_sdw_xfer_msg(amd_manager, msg, i);
326 if (ret)
327 return ret;
328 }
329 return SDW_CMD_OK;
330}
331
332static void amd_sdw_fill_slave_status(struct amd_sdw_manager *amd_manager, u16 index, u32 status)
333{
334 switch (status) {
335 case SDW_SLAVE_ATTACHED:
336 case SDW_SLAVE_UNATTACHED:
337 case SDW_SLAVE_ALERT:
338 amd_manager->status[index] = status;
339 break;
340 default:
341 amd_manager->status[index] = SDW_SLAVE_RESERVED;
342 break;
343 }
344}
345
346static void amd_sdw_process_ping_status(u64 response, struct amd_sdw_manager *amd_manager)
347{
348 u64 slave_stat;
349 u32 val;
350 u16 dev_index;
351
352 /* slave status response */
353 slave_stat = FIELD_GET(AMD_SDW_MCP_SLAVE_STAT_0_3, response);
354 slave_stat |= FIELD_GET(AMD_SDW_MCP_SLAVE_STAT_4_11, response) << 8;
355 dev_dbg(amd_manager->dev, "slave_stat:0x%llx\n", slave_stat);
356 for (dev_index = 0; dev_index <= SDW_MAX_DEVICES; ++dev_index) {
357 val = (slave_stat >> (dev_index * 2)) & AMD_SDW_MCP_SLAVE_STATUS_MASK;
358 dev_dbg(amd_manager->dev, "val:0x%x\n", val);
359 amd_sdw_fill_slave_status(amd_manager, dev_index, val);
360 }
361}
362
363static void amd_sdw_read_and_process_ping_status(struct amd_sdw_manager *amd_manager)
364{
365 u64 response;
366
367 mutex_lock(&amd_manager->bus.msg_lock);
368 response = amd_sdw_send_cmd_get_resp(amd_manager, 0, 0);
369 mutex_unlock(&amd_manager->bus.msg_lock);
370 amd_sdw_process_ping_status(response, amd_manager);
371}
372
373static u32 amd_sdw_read_ping_status(struct sdw_bus *bus)
374{
375 struct amd_sdw_manager *amd_manager = to_amd_sdw(bus);
376 u64 response;
377 u32 slave_stat;
378
379 response = amd_sdw_send_cmd_get_resp(amd_manager, 0, 0);
380 /* slave status from ping response */
381 slave_stat = FIELD_GET(AMD_SDW_MCP_SLAVE_STAT_0_3, response);
382 slave_stat |= FIELD_GET(AMD_SDW_MCP_SLAVE_STAT_4_11, response) << 8;
383 dev_dbg(amd_manager->dev, "slave_stat:0x%x\n", slave_stat);
384 return slave_stat;
385}
386
387static int amd_sdw_compute_params(struct sdw_bus *bus)
388{
389 struct sdw_transport_data t_data = {0};
390 struct sdw_master_runtime *m_rt;
391 struct sdw_port_runtime *p_rt;
392 struct sdw_bus_params *b_params = &bus->params;
393 int port_bo, hstart, hstop, sample_int;
394 unsigned int rate, bps;
395
396 port_bo = 0;
397 hstart = 1;
398 hstop = bus->params.col - 1;
399 t_data.hstop = hstop;
400 t_data.hstart = hstart;
401
402 list_for_each_entry(m_rt, &bus->m_rt_list, bus_node) {
403 rate = m_rt->stream->params.rate;
404 bps = m_rt->stream->params.bps;
405 sample_int = (bus->params.curr_dr_freq / rate);
406 list_for_each_entry(p_rt, &m_rt->port_list, port_node) {
407 port_bo = (p_rt->num * 64) + 1;
408 dev_dbg(bus->dev, "p_rt->num=%d hstart=%d hstop=%d port_bo=%d\n",
409 p_rt->num, hstart, hstop, port_bo);
410 sdw_fill_xport_params(&p_rt->transport_params, p_rt->num,
411 false, SDW_BLK_GRP_CNT_1, sample_int,
412 port_bo, port_bo >> 8, hstart, hstop,
413 SDW_BLK_PKG_PER_PORT, 0x0);
414
415 sdw_fill_port_params(&p_rt->port_params,
416 p_rt->num, bps,
417 SDW_PORT_FLOW_MODE_ISOCH,
418 b_params->m_data_mode);
419 t_data.hstart = hstart;
420 t_data.hstop = hstop;
421 t_data.block_offset = port_bo;
422 t_data.sub_block_offset = 0;
423 }
424 sdw_compute_slave_ports(m_rt, &t_data);
425 }
426 return 0;
427}
428
429static int amd_sdw_port_params(struct sdw_bus *bus, struct sdw_port_params *p_params,
430 unsigned int bank)
431{
432 struct amd_sdw_manager *amd_manager = to_amd_sdw(bus);
433 u32 frame_fmt_reg, dpn_frame_fmt;
434
435 dev_dbg(amd_manager->dev, "p_params->num:0x%x\n", p_params->num);
436 switch (amd_manager->acp_rev) {
437 case ACP63_PCI_REV_ID:
438 switch (amd_manager->instance) {
439 case ACP_SDW0:
440 frame_fmt_reg = acp63_sdw0_dp_reg[p_params->num].frame_fmt_reg;
441 break;
442 case ACP_SDW1:
443 frame_fmt_reg = acp63_sdw1_dp_reg[p_params->num].frame_fmt_reg;
444 break;
445 default:
446 return -EINVAL;
447 }
448 break;
449 default:
450 return -EINVAL;
451 }
452
453 dpn_frame_fmt = readl(amd_manager->mmio + frame_fmt_reg);
454 u32p_replace_bits(&dpn_frame_fmt, p_params->flow_mode, AMD_DPN_FRAME_FMT_PFM);
455 u32p_replace_bits(&dpn_frame_fmt, p_params->data_mode, AMD_DPN_FRAME_FMT_PDM);
456 u32p_replace_bits(&dpn_frame_fmt, p_params->bps - 1, AMD_DPN_FRAME_FMT_WORD_LEN);
457 writel(dpn_frame_fmt, amd_manager->mmio + frame_fmt_reg);
458 return 0;
459}
460
461static int amd_sdw_transport_params(struct sdw_bus *bus,
462 struct sdw_transport_params *params,
463 enum sdw_reg_bank bank)
464{
465 struct amd_sdw_manager *amd_manager = to_amd_sdw(bus);
466 u32 dpn_frame_fmt;
467 u32 dpn_sampleinterval;
468 u32 dpn_hctrl;
469 u32 dpn_offsetctrl;
470 u32 dpn_lanectrl;
471 u32 frame_fmt_reg, sample_int_reg, hctrl_dp0_reg;
472 u32 offset_reg, lane_ctrl_ch_en_reg;
473
474 switch (amd_manager->acp_rev) {
475 case ACP63_PCI_REV_ID:
476 switch (amd_manager->instance) {
477 case ACP_SDW0:
478 frame_fmt_reg = acp63_sdw0_dp_reg[params->port_num].frame_fmt_reg;
479 sample_int_reg = acp63_sdw0_dp_reg[params->port_num].sample_int_reg;
480 hctrl_dp0_reg = acp63_sdw0_dp_reg[params->port_num].hctrl_dp0_reg;
481 offset_reg = acp63_sdw0_dp_reg[params->port_num].offset_reg;
482 lane_ctrl_ch_en_reg =
483 acp63_sdw0_dp_reg[params->port_num].lane_ctrl_ch_en_reg;
484 break;
485 case ACP_SDW1:
486 frame_fmt_reg = acp63_sdw1_dp_reg[params->port_num].frame_fmt_reg;
487 sample_int_reg = acp63_sdw1_dp_reg[params->port_num].sample_int_reg;
488 hctrl_dp0_reg = acp63_sdw1_dp_reg[params->port_num].hctrl_dp0_reg;
489 offset_reg = acp63_sdw1_dp_reg[params->port_num].offset_reg;
490 lane_ctrl_ch_en_reg =
491 acp63_sdw1_dp_reg[params->port_num].lane_ctrl_ch_en_reg;
492 break;
493 default:
494 return -EINVAL;
495 }
496 break;
497 default:
498 return -EINVAL;
499 }
500 writel(AMD_SDW_SSP_COUNTER_VAL, amd_manager->mmio + ACP_SW_SSP_COUNTER);
501
502 dpn_frame_fmt = readl(amd_manager->mmio + frame_fmt_reg);
503 u32p_replace_bits(&dpn_frame_fmt, params->blk_pkg_mode, AMD_DPN_FRAME_FMT_BLK_PKG_MODE);
504 u32p_replace_bits(&dpn_frame_fmt, params->blk_grp_ctrl, AMD_DPN_FRAME_FMT_BLK_GRP_CTRL);
505 u32p_replace_bits(&dpn_frame_fmt, SDW_STREAM_PCM, AMD_DPN_FRAME_FMT_PCM_OR_PDM);
506 writel(dpn_frame_fmt, amd_manager->mmio + frame_fmt_reg);
507
508 dpn_sampleinterval = params->sample_interval - 1;
509 writel(dpn_sampleinterval, amd_manager->mmio + sample_int_reg);
510
511 dpn_hctrl = FIELD_PREP(AMD_DPN_HCTRL_HSTOP, params->hstop);
512 dpn_hctrl |= FIELD_PREP(AMD_DPN_HCTRL_HSTART, params->hstart);
513 writel(dpn_hctrl, amd_manager->mmio + hctrl_dp0_reg);
514
515 dpn_offsetctrl = FIELD_PREP(AMD_DPN_OFFSET_CTRL_1, params->offset1);
516 dpn_offsetctrl |= FIELD_PREP(AMD_DPN_OFFSET_CTRL_2, params->offset2);
517 writel(dpn_offsetctrl, amd_manager->mmio + offset_reg);
518
519 /*
520 * lane_ctrl_ch_en_reg will be used to program lane_ctrl and ch_mask
521 * parameters.
522 */
523 dpn_lanectrl = readl(amd_manager->mmio + lane_ctrl_ch_en_reg);
524 u32p_replace_bits(&dpn_lanectrl, params->lane_ctrl, AMD_DPN_CH_EN_LCTRL);
525 writel(dpn_lanectrl, amd_manager->mmio + lane_ctrl_ch_en_reg);
526 return 0;
527}
528
529static int amd_sdw_port_enable(struct sdw_bus *bus,
530 struct sdw_enable_ch *enable_ch,
531 unsigned int bank)
532{
533 struct amd_sdw_manager *amd_manager = to_amd_sdw(bus);
534 u32 dpn_ch_enable;
535 u32 lane_ctrl_ch_en_reg;
536
537 switch (amd_manager->acp_rev) {
538 case ACP63_PCI_REV_ID:
539 switch (amd_manager->instance) {
540 case ACP_SDW0:
541 lane_ctrl_ch_en_reg =
542 acp63_sdw0_dp_reg[enable_ch->port_num].lane_ctrl_ch_en_reg;
543 break;
544 case ACP_SDW1:
545 lane_ctrl_ch_en_reg =
546 acp63_sdw1_dp_reg[enable_ch->port_num].lane_ctrl_ch_en_reg;
547 break;
548 default:
549 return -EINVAL;
550 }
551 break;
552 default:
553 return -EINVAL;
554 }
555
556 /*
557 * lane_ctrl_ch_en_reg will be used to program lane_ctrl and ch_mask
558 * parameters.
559 */
560 dpn_ch_enable = readl(amd_manager->mmio + lane_ctrl_ch_en_reg);
561 u32p_replace_bits(&dpn_ch_enable, enable_ch->ch_mask, AMD_DPN_CH_EN_CHMASK);
562 if (enable_ch->enable)
563 writel(dpn_ch_enable, amd_manager->mmio + lane_ctrl_ch_en_reg);
564 else
565 writel(0, amd_manager->mmio + lane_ctrl_ch_en_reg);
566 return 0;
567}
568
569static int sdw_master_read_amd_prop(struct sdw_bus *bus)
570{
571 struct amd_sdw_manager *amd_manager = to_amd_sdw(bus);
572 struct fwnode_handle *link;
573 struct sdw_master_prop *prop;
574 u32 quirk_mask = 0;
575 u32 wake_en_mask = 0;
576 u32 power_mode_mask = 0;
577 char name[32];
578
579 prop = &bus->prop;
580 /* Find manager handle */
581 snprintf(name, sizeof(name), "mipi-sdw-link-%d-subproperties", bus->link_id);
582 link = device_get_named_child_node(bus->dev, name);
583 if (!link) {
584 dev_err(bus->dev, "Manager node %s not found\n", name);
585 return -EIO;
586 }
587 fwnode_property_read_u32(link, "amd-sdw-enable", &quirk_mask);
588 if (!(quirk_mask & AMD_SDW_QUIRK_MASK_BUS_ENABLE))
589 prop->hw_disabled = true;
590 prop->quirks = SDW_MASTER_QUIRKS_CLEAR_INITIAL_CLASH |
591 SDW_MASTER_QUIRKS_CLEAR_INITIAL_PARITY;
592
593 fwnode_property_read_u32(link, "amd-sdw-wakeup-enable", &wake_en_mask);
594 amd_manager->wake_en_mask = wake_en_mask;
595 fwnode_property_read_u32(link, "amd-sdw-power-mode", &power_mode_mask);
596 amd_manager->power_mode_mask = power_mode_mask;
597
598 fwnode_handle_put(link);
599
600 return 0;
601}
602
603static int amd_prop_read(struct sdw_bus *bus)
604{
605 sdw_master_read_prop(bus);
606 sdw_master_read_amd_prop(bus);
607 return 0;
608}
609
610static const struct sdw_master_port_ops amd_sdw_port_ops = {
611 .dpn_set_port_params = amd_sdw_port_params,
612 .dpn_set_port_transport_params = amd_sdw_transport_params,
613 .dpn_port_enable_ch = amd_sdw_port_enable,
614};
615
616static const struct sdw_master_ops amd_sdw_ops = {
617 .read_prop = amd_prop_read,
618 .xfer_msg = amd_sdw_xfer_msg,
619 .read_ping_status = amd_sdw_read_ping_status,
620};
621
622static int amd_sdw_hw_params(struct snd_pcm_substream *substream,
623 struct snd_pcm_hw_params *params,
624 struct snd_soc_dai *dai)
625{
626 struct amd_sdw_manager *amd_manager = snd_soc_dai_get_drvdata(dai);
627 struct sdw_amd_dai_runtime *dai_runtime;
628 struct sdw_stream_config sconfig;
629 int ch, dir;
630 int ret;
631
632 dai_runtime = amd_manager->dai_runtime_array[dai->id];
633 if (!dai_runtime)
634 return -EIO;
635
636 ch = params_channels(params);
637 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
638 dir = SDW_DATA_DIR_RX;
639 else
640 dir = SDW_DATA_DIR_TX;
641 dev_dbg(amd_manager->dev, "dir:%d dai->id:0x%x\n", dir, dai->id);
642
643 sconfig.direction = dir;
644 sconfig.ch_count = ch;
645 sconfig.frame_rate = params_rate(params);
646 sconfig.type = dai_runtime->stream_type;
647
648 sconfig.bps = snd_pcm_format_width(params_format(params));
649
650 /* Port configuration */
651 struct sdw_port_config *pconfig __free(kfree) = kzalloc(sizeof(*pconfig),
652 GFP_KERNEL);
653 if (!pconfig)
654 return -ENOMEM;
655
656 pconfig->num = dai->id;
657 pconfig->ch_mask = (1 << ch) - 1;
658 ret = sdw_stream_add_master(&amd_manager->bus, &sconfig,
659 pconfig, 1, dai_runtime->stream);
660 if (ret)
661 dev_err(amd_manager->dev, "add manager to stream failed:%d\n", ret);
662
663 return ret;
664}
665
666static int amd_sdw_hw_free(struct snd_pcm_substream *substream, struct snd_soc_dai *dai)
667{
668 struct amd_sdw_manager *amd_manager = snd_soc_dai_get_drvdata(dai);
669 struct sdw_amd_dai_runtime *dai_runtime;
670 int ret;
671
672 dai_runtime = amd_manager->dai_runtime_array[dai->id];
673 if (!dai_runtime)
674 return -EIO;
675
676 ret = sdw_stream_remove_master(&amd_manager->bus, dai_runtime->stream);
677 if (ret < 0)
678 dev_err(dai->dev, "remove manager from stream %s failed: %d\n",
679 dai_runtime->stream->name, ret);
680 return ret;
681}
682
683static int amd_set_sdw_stream(struct snd_soc_dai *dai, void *stream, int direction)
684{
685 struct amd_sdw_manager *amd_manager = snd_soc_dai_get_drvdata(dai);
686 struct sdw_amd_dai_runtime *dai_runtime;
687
688 dai_runtime = amd_manager->dai_runtime_array[dai->id];
689 if (stream) {
690 /* first paranoia check */
691 if (dai_runtime) {
692 dev_err(dai->dev, "dai_runtime already allocated for dai %s\n", dai->name);
693 return -EINVAL;
694 }
695
696 /* allocate and set dai_runtime info */
697 dai_runtime = kzalloc(sizeof(*dai_runtime), GFP_KERNEL);
698 if (!dai_runtime)
699 return -ENOMEM;
700
701 dai_runtime->stream_type = SDW_STREAM_PCM;
702 dai_runtime->bus = &amd_manager->bus;
703 dai_runtime->stream = stream;
704 amd_manager->dai_runtime_array[dai->id] = dai_runtime;
705 } else {
706 /* second paranoia check */
707 if (!dai_runtime) {
708 dev_err(dai->dev, "dai_runtime not allocated for dai %s\n", dai->name);
709 return -EINVAL;
710 }
711
712 /* for NULL stream we release allocated dai_runtime */
713 kfree(dai_runtime);
714 amd_manager->dai_runtime_array[dai->id] = NULL;
715 }
716 return 0;
717}
718
719static int amd_pcm_set_sdw_stream(struct snd_soc_dai *dai, void *stream, int direction)
720{
721 return amd_set_sdw_stream(dai, stream, direction);
722}
723
724static void *amd_get_sdw_stream(struct snd_soc_dai *dai, int direction)
725{
726 struct amd_sdw_manager *amd_manager = snd_soc_dai_get_drvdata(dai);
727 struct sdw_amd_dai_runtime *dai_runtime;
728
729 dai_runtime = amd_manager->dai_runtime_array[dai->id];
730 if (!dai_runtime)
731 return ERR_PTR(-EINVAL);
732
733 return dai_runtime->stream;
734}
735
736static const struct snd_soc_dai_ops amd_sdw_dai_ops = {
737 .hw_params = amd_sdw_hw_params,
738 .hw_free = amd_sdw_hw_free,
739 .set_stream = amd_pcm_set_sdw_stream,
740 .get_stream = amd_get_sdw_stream,
741};
742
743static const struct snd_soc_component_driver amd_sdw_dai_component = {
744 .name = "soundwire",
745};
746
747static int amd_sdw_register_dais(struct amd_sdw_manager *amd_manager)
748{
749 struct sdw_amd_dai_runtime **dai_runtime_array;
750 struct snd_soc_dai_driver *dais;
751 struct snd_soc_pcm_stream *stream;
752 struct device *dev;
753 int i, num_dais;
754
755 dev = amd_manager->dev;
756 num_dais = amd_manager->num_dout_ports + amd_manager->num_din_ports;
757 dais = devm_kcalloc(dev, num_dais, sizeof(*dais), GFP_KERNEL);
758 if (!dais)
759 return -ENOMEM;
760
761 dai_runtime_array = devm_kcalloc(dev, num_dais,
762 sizeof(struct sdw_amd_dai_runtime *),
763 GFP_KERNEL);
764 if (!dai_runtime_array)
765 return -ENOMEM;
766 amd_manager->dai_runtime_array = dai_runtime_array;
767 for (i = 0; i < num_dais; i++) {
768 dais[i].name = devm_kasprintf(dev, GFP_KERNEL, "SDW%d Pin%d", amd_manager->instance,
769 i);
770 if (!dais[i].name)
771 return -ENOMEM;
772 if (i < amd_manager->num_dout_ports)
773 stream = &dais[i].playback;
774 else
775 stream = &dais[i].capture;
776
777 stream->channels_min = 2;
778 stream->channels_max = 2;
779 stream->rates = SNDRV_PCM_RATE_48000;
780 stream->formats = SNDRV_PCM_FMTBIT_S16_LE;
781
782 dais[i].ops = &amd_sdw_dai_ops;
783 dais[i].id = i;
784 }
785
786 return devm_snd_soc_register_component(dev, &amd_sdw_dai_component,
787 dais, num_dais);
788}
789
790static void amd_sdw_update_slave_status_work(struct work_struct *work)
791{
792 struct amd_sdw_manager *amd_manager =
793 container_of(work, struct amd_sdw_manager, amd_sdw_work);
794 int retry_count = 0;
795
796 if (amd_manager->status[0] == SDW_SLAVE_ATTACHED) {
797 writel(0, amd_manager->mmio + ACP_SW_STATE_CHANGE_STATUS_MASK_0TO7);
798 writel(0, amd_manager->mmio + ACP_SW_STATE_CHANGE_STATUS_MASK_8TO11);
799 }
800
801update_status:
802 sdw_handle_slave_status(&amd_manager->bus, amd_manager->status);
803 /*
804 * During the peripheral enumeration sequence, the SoundWire manager interrupts
805 * are masked. Once the device number programming is done for all peripherals,
806 * interrupts will be unmasked. Read the peripheral device status from ping command
807 * and process the response. This sequence will ensure all peripheral devices enumerated
808 * and initialized properly.
809 */
810 if (amd_manager->status[0] == SDW_SLAVE_ATTACHED) {
811 if (retry_count++ < SDW_MAX_DEVICES) {
812 writel(AMD_SDW_IRQ_MASK_0TO7, amd_manager->mmio +
813 ACP_SW_STATE_CHANGE_STATUS_MASK_0TO7);
814 writel(AMD_SDW_IRQ_MASK_8TO11, amd_manager->mmio +
815 ACP_SW_STATE_CHANGE_STATUS_MASK_8TO11);
816 amd_sdw_read_and_process_ping_status(amd_manager);
817 goto update_status;
818 } else {
819 dev_err_ratelimited(amd_manager->dev,
820 "Device0 detected after %d iterations\n",
821 retry_count);
822 }
823 }
824}
825
826static void amd_sdw_update_slave_status(u32 status_change_0to7, u32 status_change_8to11,
827 struct amd_sdw_manager *amd_manager)
828{
829 u64 slave_stat;
830 u32 val;
831 int dev_index;
832
833 if (status_change_0to7 == AMD_SDW_SLAVE_0_ATTACHED)
834 memset(amd_manager->status, 0, sizeof(amd_manager->status));
835 slave_stat = status_change_0to7;
836 slave_stat |= FIELD_GET(AMD_SDW_MCP_SLAVE_STATUS_8TO_11, status_change_8to11) << 32;
837 dev_dbg(amd_manager->dev, "status_change_0to7:0x%x status_change_8to11:0x%x\n",
838 status_change_0to7, status_change_8to11);
839 if (slave_stat) {
840 for (dev_index = 0; dev_index <= SDW_MAX_DEVICES; ++dev_index) {
841 if (slave_stat & AMD_SDW_MCP_SLAVE_STATUS_VALID_MASK(dev_index)) {
842 val = (slave_stat >> AMD_SDW_MCP_SLAVE_STAT_SHIFT_MASK(dev_index)) &
843 AMD_SDW_MCP_SLAVE_STATUS_MASK;
844 amd_sdw_fill_slave_status(amd_manager, dev_index, val);
845 }
846 }
847 }
848}
849
850static void amd_sdw_process_wake_event(struct amd_sdw_manager *amd_manager)
851{
852 pm_request_resume(amd_manager->dev);
853 writel(0x00, amd_manager->acp_mmio + ACP_SW_WAKE_EN(amd_manager->instance));
854 writel(0x00, amd_manager->mmio + ACP_SW_STATE_CHANGE_STATUS_8TO11);
855}
856
857static void amd_sdw_irq_thread(struct work_struct *work)
858{
859 struct amd_sdw_manager *amd_manager =
860 container_of(work, struct amd_sdw_manager, amd_sdw_irq_thread);
861 u32 status_change_8to11;
862 u32 status_change_0to7;
863
864 status_change_8to11 = readl(amd_manager->mmio + ACP_SW_STATE_CHANGE_STATUS_8TO11);
865 status_change_0to7 = readl(amd_manager->mmio + ACP_SW_STATE_CHANGE_STATUS_0TO7);
866 dev_dbg(amd_manager->dev, "[SDW%d] SDW INT: 0to7=0x%x, 8to11=0x%x\n",
867 amd_manager->instance, status_change_0to7, status_change_8to11);
868 if (status_change_8to11 & AMD_SDW_WAKE_STAT_MASK)
869 return amd_sdw_process_wake_event(amd_manager);
870
871 if (status_change_8to11 & AMD_SDW_PREQ_INTR_STAT) {
872 amd_sdw_read_and_process_ping_status(amd_manager);
873 } else {
874 /* Check for the updated status on peripheral device */
875 amd_sdw_update_slave_status(status_change_0to7, status_change_8to11, amd_manager);
876 }
877 if (status_change_8to11 || status_change_0to7)
878 schedule_work(&amd_manager->amd_sdw_work);
879 writel(0x00, amd_manager->mmio + ACP_SW_STATE_CHANGE_STATUS_8TO11);
880 writel(0x00, amd_manager->mmio + ACP_SW_STATE_CHANGE_STATUS_0TO7);
881}
882
883int amd_sdw_manager_start(struct amd_sdw_manager *amd_manager)
884{
885 struct sdw_master_prop *prop;
886 int ret;
887
888 prop = &amd_manager->bus.prop;
889 if (!prop->hw_disabled) {
890 ret = amd_init_sdw_manager(amd_manager);
891 if (ret)
892 return ret;
893 amd_enable_sdw_interrupts(amd_manager);
894 ret = amd_enable_sdw_manager(amd_manager);
895 if (ret)
896 return ret;
897 amd_sdw_set_frameshape(amd_manager);
898 }
899 /* Enable runtime PM */
900 pm_runtime_set_autosuspend_delay(amd_manager->dev, AMD_SDW_MASTER_SUSPEND_DELAY_MS);
901 pm_runtime_use_autosuspend(amd_manager->dev);
902 pm_runtime_mark_last_busy(amd_manager->dev);
903 pm_runtime_set_active(amd_manager->dev);
904 pm_runtime_enable(amd_manager->dev);
905 return 0;
906}
907
908static int amd_sdw_manager_probe(struct platform_device *pdev)
909{
910 const struct acp_sdw_pdata *pdata = pdev->dev.platform_data;
911 struct resource *res;
912 struct device *dev = &pdev->dev;
913 struct sdw_master_prop *prop;
914 struct sdw_bus_params *params;
915 struct amd_sdw_manager *amd_manager;
916 int ret;
917
918 amd_manager = devm_kzalloc(dev, sizeof(struct amd_sdw_manager), GFP_KERNEL);
919 if (!amd_manager)
920 return -ENOMEM;
921
922 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
923 if (!res)
924 return -ENOMEM;
925
926 amd_manager->acp_mmio = devm_ioremap(dev, res->start, resource_size(res));
927 if (!amd_manager->acp_mmio) {
928 dev_err(dev, "mmio not found\n");
929 return -ENOMEM;
930 }
931 amd_manager->instance = pdata->instance;
932 amd_manager->mmio = amd_manager->acp_mmio +
933 (amd_manager->instance * SDW_MANAGER_REG_OFFSET);
934 amd_manager->acp_sdw_lock = pdata->acp_sdw_lock;
935 amd_manager->acp_rev = pdata->acp_rev;
936 amd_manager->cols_index = sdw_find_col_index(AMD_SDW_DEFAULT_COLUMNS);
937 amd_manager->rows_index = sdw_find_row_index(AMD_SDW_DEFAULT_ROWS);
938 amd_manager->dev = dev;
939 amd_manager->bus.ops = &amd_sdw_ops;
940 amd_manager->bus.port_ops = &amd_sdw_port_ops;
941 amd_manager->bus.compute_params = &amd_sdw_compute_params;
942 amd_manager->bus.clk_stop_timeout = 200;
943 amd_manager->bus.link_id = amd_manager->instance;
944
945 /*
946 * Due to BIOS compatibility, the two links are exposed within
947 * the scope of a single controller. If this changes, the
948 * controller_id will have to be updated with drv_data
949 * information.
950 */
951 amd_manager->bus.controller_id = 0;
952 dev_dbg(dev, "acp_rev:0x%x\n", amd_manager->acp_rev);
953 switch (amd_manager->acp_rev) {
954 case ACP63_PCI_REV_ID:
955 switch (amd_manager->instance) {
956 case ACP_SDW0:
957 amd_manager->num_dout_ports = AMD_ACP63_SDW0_MAX_TX_PORTS;
958 amd_manager->num_din_ports = AMD_ACP63_SDW0_MAX_RX_PORTS;
959 break;
960 case ACP_SDW1:
961 amd_manager->num_dout_ports = AMD_ACP63_SDW1_MAX_TX_PORTS;
962 amd_manager->num_din_ports = AMD_ACP63_SDW1_MAX_RX_PORTS;
963 break;
964 default:
965 return -EINVAL;
966 }
967 break;
968 default:
969 return -EINVAL;
970 }
971
972 params = &amd_manager->bus.params;
973
974 params->col = AMD_SDW_DEFAULT_COLUMNS;
975 params->row = AMD_SDW_DEFAULT_ROWS;
976 prop = &amd_manager->bus.prop;
977 prop->clk_freq = &amd_sdw_freq_tbl[0];
978 prop->mclk_freq = AMD_SDW_BUS_BASE_FREQ;
979 prop->max_clk_freq = AMD_SDW_DEFAULT_CLK_FREQ;
980
981 ret = sdw_bus_master_add(&amd_manager->bus, dev, dev->fwnode);
982 if (ret) {
983 dev_err(dev, "Failed to register SoundWire manager(%d)\n", ret);
984 return ret;
985 }
986 ret = amd_sdw_register_dais(amd_manager);
987 if (ret) {
988 dev_err(dev, "CPU DAI registration failed\n");
989 sdw_bus_master_delete(&amd_manager->bus);
990 return ret;
991 }
992 dev_set_drvdata(dev, amd_manager);
993 INIT_WORK(&amd_manager->amd_sdw_irq_thread, amd_sdw_irq_thread);
994 INIT_WORK(&amd_manager->amd_sdw_work, amd_sdw_update_slave_status_work);
995 return 0;
996}
997
998static void amd_sdw_manager_remove(struct platform_device *pdev)
999{
1000 struct amd_sdw_manager *amd_manager = dev_get_drvdata(&pdev->dev);
1001 int ret;
1002
1003 pm_runtime_disable(&pdev->dev);
1004 amd_disable_sdw_interrupts(amd_manager);
1005 sdw_bus_master_delete(&amd_manager->bus);
1006 ret = amd_disable_sdw_manager(amd_manager);
1007 if (ret)
1008 dev_err(&pdev->dev, "Failed to disable device (%pe)\n", ERR_PTR(ret));
1009}
1010
1011static int amd_sdw_clock_stop(struct amd_sdw_manager *amd_manager)
1012{
1013 u32 val;
1014 int ret;
1015
1016 ret = sdw_bus_prep_clk_stop(&amd_manager->bus);
1017 if (ret < 0 && ret != -ENODATA) {
1018 dev_err(amd_manager->dev, "prepare clock stop failed %d", ret);
1019 return 0;
1020 }
1021 ret = sdw_bus_clk_stop(&amd_manager->bus);
1022 if (ret < 0 && ret != -ENODATA) {
1023 dev_err(amd_manager->dev, "bus clock stop failed %d", ret);
1024 return 0;
1025 }
1026
1027 ret = readl_poll_timeout(amd_manager->mmio + ACP_SW_CLK_RESUME_CTRL, val,
1028 (val & AMD_SDW_CLK_STOP_DONE), ACP_DELAY_US, AMD_SDW_TIMEOUT);
1029 if (ret) {
1030 dev_err(amd_manager->dev, "SDW%x clock stop failed\n", amd_manager->instance);
1031 return 0;
1032 }
1033
1034 amd_manager->clk_stopped = true;
1035 if (amd_manager->wake_en_mask)
1036 writel(0x01, amd_manager->acp_mmio + ACP_SW_WAKE_EN(amd_manager->instance));
1037
1038 dev_dbg(amd_manager->dev, "SDW%x clock stop successful\n", amd_manager->instance);
1039 return 0;
1040}
1041
1042static int amd_sdw_clock_stop_exit(struct amd_sdw_manager *amd_manager)
1043{
1044 int ret;
1045 u32 val;
1046
1047 if (amd_manager->clk_stopped) {
1048 val = readl(amd_manager->mmio + ACP_SW_CLK_RESUME_CTRL);
1049 val |= AMD_SDW_CLK_RESUME_REQ;
1050 writel(val, amd_manager->mmio + ACP_SW_CLK_RESUME_CTRL);
1051 ret = readl_poll_timeout(amd_manager->mmio + ACP_SW_CLK_RESUME_CTRL, val,
1052 (val & AMD_SDW_CLK_RESUME_DONE), ACP_DELAY_US,
1053 AMD_SDW_TIMEOUT);
1054 if (val & AMD_SDW_CLK_RESUME_DONE) {
1055 writel(0, amd_manager->mmio + ACP_SW_CLK_RESUME_CTRL);
1056 ret = sdw_bus_exit_clk_stop(&amd_manager->bus);
1057 if (ret < 0)
1058 dev_err(amd_manager->dev, "bus failed to exit clock stop %d\n",
1059 ret);
1060 amd_manager->clk_stopped = false;
1061 }
1062 }
1063 if (amd_manager->clk_stopped) {
1064 dev_err(amd_manager->dev, "SDW%x clock stop exit failed\n", amd_manager->instance);
1065 return 0;
1066 }
1067 dev_dbg(amd_manager->dev, "SDW%x clock stop exit successful\n", amd_manager->instance);
1068 return 0;
1069}
1070
1071static int amd_resume_child_device(struct device *dev, void *data)
1072{
1073 struct sdw_slave *slave = dev_to_sdw_dev(dev);
1074 int ret;
1075
1076 if (!slave->probed) {
1077 dev_dbg(dev, "skipping device, no probed driver\n");
1078 return 0;
1079 }
1080 if (!slave->dev_num_sticky) {
1081 dev_dbg(dev, "skipping device, never detected on bus\n");
1082 return 0;
1083 }
1084 ret = pm_request_resume(dev);
1085 if (ret < 0) {
1086 dev_err(dev, "pm_request_resume failed: %d\n", ret);
1087 return ret;
1088 }
1089 return 0;
1090}
1091
1092static int __maybe_unused amd_pm_prepare(struct device *dev)
1093{
1094 struct amd_sdw_manager *amd_manager = dev_get_drvdata(dev);
1095 struct sdw_bus *bus = &amd_manager->bus;
1096 int ret;
1097
1098 if (bus->prop.hw_disabled) {
1099 dev_dbg(bus->dev, "SoundWire manager %d is disabled, ignoring\n",
1100 bus->link_id);
1101 return 0;
1102 }
1103 /*
1104 * When multiple peripheral devices connected over the same link, if SoundWire manager
1105 * device is not in runtime suspend state, observed that device alerts are missing
1106 * without pm_prepare on AMD platforms in clockstop mode0.
1107 */
1108 if (amd_manager->power_mode_mask & AMD_SDW_CLK_STOP_MODE) {
1109 ret = pm_request_resume(dev);
1110 if (ret < 0) {
1111 dev_err(bus->dev, "pm_request_resume failed: %d\n", ret);
1112 return 0;
1113 }
1114 }
1115 /* To force peripheral devices to system level suspend state, resume the devices
1116 * from runtime suspend state first. Without that unable to dispatch the alert
1117 * status to peripheral driver during system level resume as they are in runtime
1118 * suspend state.
1119 */
1120 ret = device_for_each_child(bus->dev, NULL, amd_resume_child_device);
1121 if (ret < 0)
1122 dev_err(dev, "amd_resume_child_device failed: %d\n", ret);
1123 return 0;
1124}
1125
1126static int __maybe_unused amd_suspend(struct device *dev)
1127{
1128 struct amd_sdw_manager *amd_manager = dev_get_drvdata(dev);
1129 struct sdw_bus *bus = &amd_manager->bus;
1130 int ret;
1131
1132 if (bus->prop.hw_disabled) {
1133 dev_dbg(bus->dev, "SoundWire manager %d is disabled, ignoring\n",
1134 bus->link_id);
1135 return 0;
1136 }
1137
1138 if (amd_manager->power_mode_mask & AMD_SDW_CLK_STOP_MODE) {
1139 amd_sdw_wake_enable(amd_manager, false);
1140 return amd_sdw_clock_stop(amd_manager);
1141 } else if (amd_manager->power_mode_mask & AMD_SDW_POWER_OFF_MODE) {
1142 /*
1143 * As per hardware programming sequence on AMD platforms,
1144 * clock stop should be invoked first before powering-off
1145 */
1146 ret = amd_sdw_clock_stop(amd_manager);
1147 if (ret)
1148 return ret;
1149 return amd_deinit_sdw_manager(amd_manager);
1150 }
1151 return 0;
1152}
1153
1154static int __maybe_unused amd_suspend_runtime(struct device *dev)
1155{
1156 struct amd_sdw_manager *amd_manager = dev_get_drvdata(dev);
1157 struct sdw_bus *bus = &amd_manager->bus;
1158 int ret;
1159
1160 if (bus->prop.hw_disabled) {
1161 dev_dbg(bus->dev, "SoundWire manager %d is disabled,\n",
1162 bus->link_id);
1163 return 0;
1164 }
1165 if (amd_manager->power_mode_mask & AMD_SDW_CLK_STOP_MODE) {
1166 amd_sdw_wake_enable(amd_manager, true);
1167 return amd_sdw_clock_stop(amd_manager);
1168 } else if (amd_manager->power_mode_mask & AMD_SDW_POWER_OFF_MODE) {
1169 ret = amd_sdw_clock_stop(amd_manager);
1170 if (ret)
1171 return ret;
1172 return amd_deinit_sdw_manager(amd_manager);
1173 }
1174 return 0;
1175}
1176
1177static int __maybe_unused amd_resume_runtime(struct device *dev)
1178{
1179 struct amd_sdw_manager *amd_manager = dev_get_drvdata(dev);
1180 struct sdw_bus *bus = &amd_manager->bus;
1181 int ret;
1182 u32 val;
1183
1184 if (bus->prop.hw_disabled) {
1185 dev_dbg(bus->dev, "SoundWire manager %d is disabled, ignoring\n",
1186 bus->link_id);
1187 return 0;
1188 }
1189
1190 if (amd_manager->power_mode_mask & AMD_SDW_CLK_STOP_MODE) {
1191 return amd_sdw_clock_stop_exit(amd_manager);
1192 } else if (amd_manager->power_mode_mask & AMD_SDW_POWER_OFF_MODE) {
1193 val = readl(amd_manager->mmio + ACP_SW_CLK_RESUME_CTRL);
1194 if (val) {
1195 val |= AMD_SDW_CLK_RESUME_REQ;
1196 writel(val, amd_manager->mmio + ACP_SW_CLK_RESUME_CTRL);
1197 ret = readl_poll_timeout(amd_manager->mmio + ACP_SW_CLK_RESUME_CTRL, val,
1198 (val & AMD_SDW_CLK_RESUME_DONE), ACP_DELAY_US,
1199 AMD_SDW_TIMEOUT);
1200 if (val & AMD_SDW_CLK_RESUME_DONE) {
1201 writel(0, amd_manager->mmio + ACP_SW_CLK_RESUME_CTRL);
1202 amd_manager->clk_stopped = false;
1203 }
1204 }
1205 sdw_clear_slave_status(bus, SDW_UNATTACH_REQUEST_MASTER_RESET);
1206 amd_init_sdw_manager(amd_manager);
1207 amd_enable_sdw_interrupts(amd_manager);
1208 ret = amd_enable_sdw_manager(amd_manager);
1209 if (ret)
1210 return ret;
1211 amd_sdw_set_frameshape(amd_manager);
1212 }
1213 return 0;
1214}
1215
1216static const struct dev_pm_ops amd_pm = {
1217 .prepare = amd_pm_prepare,
1218 SET_SYSTEM_SLEEP_PM_OPS(amd_suspend, amd_resume_runtime)
1219 SET_RUNTIME_PM_OPS(amd_suspend_runtime, amd_resume_runtime, NULL)
1220};
1221
1222static struct platform_driver amd_sdw_driver = {
1223 .probe = &amd_sdw_manager_probe,
1224 .remove = &amd_sdw_manager_remove,
1225 .driver = {
1226 .name = "amd_sdw_manager",
1227 .pm = &amd_pm,
1228 }
1229};
1230module_platform_driver(amd_sdw_driver);
1231
1232MODULE_AUTHOR("Vijendar.Mukunda@amd.com");
1233MODULE_DESCRIPTION("AMD SoundWire driver");
1234MODULE_LICENSE("Dual BSD/GPL");
1235MODULE_ALIAS("platform:" DRV_NAME);