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Merge tag 'wireless-drivers-2020-12-22' of git://git.kernel.org/pub/scm/linux/kernel...
[mirror_ubuntu-jammy-kernel.git] / drivers / slimbus / qcom-ngd-ctrl.c
1 // SPDX-License-Identifier: GPL-2.0
2 // Copyright (c) 2011-2017, The Linux Foundation. All rights reserved.
3 // Copyright (c) 2018, Linaro Limited
4
5 #include <linux/irq.h>
6 #include <linux/kernel.h>
7 #include <linux/init.h>
8 #include <linux/slab.h>
9 #include <linux/interrupt.h>
10 #include <linux/platform_device.h>
11 #include <linux/dma-mapping.h>
12 #include <linux/dmaengine.h>
13 #include <linux/slimbus.h>
14 #include <linux/delay.h>
15 #include <linux/pm_runtime.h>
16 #include <linux/mutex.h>
17 #include <linux/notifier.h>
18 #include <linux/remoteproc/qcom_rproc.h>
19 #include <linux/of.h>
20 #include <linux/io.h>
21 #include <linux/soc/qcom/qmi.h>
22 #include <linux/soc/qcom/pdr.h>
23 #include <net/sock.h>
24 #include "slimbus.h"
25
26 /* NGD (Non-ported Generic Device) registers */
27 #define NGD_CFG 0x0
28 #define NGD_CFG_ENABLE BIT(0)
29 #define NGD_CFG_RX_MSGQ_EN BIT(1)
30 #define NGD_CFG_TX_MSGQ_EN BIT(2)
31 #define NGD_STATUS 0x4
32 #define NGD_LADDR BIT(1)
33 #define NGD_RX_MSGQ_CFG 0x8
34 #define NGD_INT_EN 0x10
35 #define NGD_INT_RECFG_DONE BIT(24)
36 #define NGD_INT_TX_NACKED_2 BIT(25)
37 #define NGD_INT_MSG_BUF_CONTE BIT(26)
38 #define NGD_INT_MSG_TX_INVAL BIT(27)
39 #define NGD_INT_IE_VE_CHG BIT(28)
40 #define NGD_INT_DEV_ERR BIT(29)
41 #define NGD_INT_RX_MSG_RCVD BIT(30)
42 #define NGD_INT_TX_MSG_SENT BIT(31)
43 #define NGD_INT_STAT 0x14
44 #define NGD_INT_CLR 0x18
45 #define DEF_NGD_INT_MASK (NGD_INT_TX_NACKED_2 | NGD_INT_MSG_BUF_CONTE | \
46 NGD_INT_MSG_TX_INVAL | NGD_INT_IE_VE_CHG | \
47 NGD_INT_DEV_ERR | NGD_INT_TX_MSG_SENT | \
48 NGD_INT_RX_MSG_RCVD)
49
50 /* Slimbus QMI service */
51 #define SLIMBUS_QMI_SVC_ID 0x0301
52 #define SLIMBUS_QMI_SVC_V1 1
53 #define SLIMBUS_QMI_INS_ID 0
54 #define SLIMBUS_QMI_SELECT_INSTANCE_REQ_V01 0x0020
55 #define SLIMBUS_QMI_SELECT_INSTANCE_RESP_V01 0x0020
56 #define SLIMBUS_QMI_POWER_REQ_V01 0x0021
57 #define SLIMBUS_QMI_POWER_RESP_V01 0x0021
58 #define SLIMBUS_QMI_CHECK_FRAMER_STATUS_REQ 0x0022
59 #define SLIMBUS_QMI_CHECK_FRAMER_STATUS_RESP 0x0022
60 #define SLIMBUS_QMI_POWER_REQ_MAX_MSG_LEN 14
61 #define SLIMBUS_QMI_POWER_RESP_MAX_MSG_LEN 7
62 #define SLIMBUS_QMI_SELECT_INSTANCE_REQ_MAX_MSG_LEN 14
63 #define SLIMBUS_QMI_SELECT_INSTANCE_RESP_MAX_MSG_LEN 7
64 #define SLIMBUS_QMI_CHECK_FRAMER_STAT_RESP_MAX_MSG_LEN 7
65 /* QMI response timeout of 500ms */
66 #define SLIMBUS_QMI_RESP_TOUT 1000
67
68 /* User defined commands */
69 #define SLIM_USR_MC_GENERIC_ACK 0x25
70 #define SLIM_USR_MC_MASTER_CAPABILITY 0x0
71 #define SLIM_USR_MC_REPORT_SATELLITE 0x1
72 #define SLIM_USR_MC_ADDR_QUERY 0xD
73 #define SLIM_USR_MC_ADDR_REPLY 0xE
74 #define SLIM_USR_MC_DEFINE_CHAN 0x20
75 #define SLIM_USR_MC_DEF_ACT_CHAN 0x21
76 #define SLIM_USR_MC_CHAN_CTRL 0x23
77 #define SLIM_USR_MC_RECONFIG_NOW 0x24
78 #define SLIM_USR_MC_REQ_BW 0x28
79 #define SLIM_USR_MC_CONNECT_SRC 0x2C
80 #define SLIM_USR_MC_CONNECT_SINK 0x2D
81 #define SLIM_USR_MC_DISCONNECT_PORT 0x2E
82 #define SLIM_USR_MC_REPEAT_CHANGE_VALUE 0x0
83
84 #define QCOM_SLIM_NGD_AUTOSUSPEND MSEC_PER_SEC
85 #define SLIM_RX_MSGQ_TIMEOUT_VAL 0x10000
86
87 #define SLIM_LA_MGR 0xFF
88 #define SLIM_ROOT_FREQ 24576000
89 #define LADDR_RETRY 5
90
91 /* Per spec.max 40 bytes per received message */
92 #define SLIM_MSGQ_BUF_LEN 40
93 #define QCOM_SLIM_NGD_DESC_NUM 32
94
95 #define SLIM_MSG_ASM_FIRST_WORD(l, mt, mc, dt, ad) \
96 ((l) | ((mt) << 5) | ((mc) << 8) | ((dt) << 15) | ((ad) << 16))
97
98 #define INIT_MX_RETRIES 10
99 #define DEF_RETRY_MS 10
100 #define SAT_MAGIC_LSB 0xD9
101 #define SAT_MAGIC_MSB 0xC5
102 #define SAT_MSG_VER 0x1
103 #define SAT_MSG_PROT 0x1
104 #define to_ngd(d) container_of(d, struct qcom_slim_ngd, dev)
105
106 struct ngd_reg_offset_data {
107 u32 offset, size;
108 };
109
110 static const struct ngd_reg_offset_data ngd_v1_5_offset_info = {
111 .offset = 0x1000,
112 .size = 0x1000,
113 };
114
115 enum qcom_slim_ngd_state {
116 QCOM_SLIM_NGD_CTRL_AWAKE,
117 QCOM_SLIM_NGD_CTRL_IDLE,
118 QCOM_SLIM_NGD_CTRL_ASLEEP,
119 QCOM_SLIM_NGD_CTRL_DOWN,
120 };
121
122 struct qcom_slim_ngd_qmi {
123 struct qmi_handle qmi;
124 struct sockaddr_qrtr svc_info;
125 struct qmi_handle svc_event_hdl;
126 struct qmi_response_type_v01 resp;
127 struct qmi_handle *handle;
128 struct completion qmi_comp;
129 };
130
131 struct qcom_slim_ngd_ctrl;
132 struct qcom_slim_ngd;
133
134 struct qcom_slim_ngd_dma_desc {
135 struct dma_async_tx_descriptor *desc;
136 struct qcom_slim_ngd_ctrl *ctrl;
137 struct completion *comp;
138 dma_cookie_t cookie;
139 dma_addr_t phys;
140 void *base;
141 };
142
143 struct qcom_slim_ngd {
144 struct platform_device *pdev;
145 void __iomem *base;
146 int id;
147 };
148
149 struct qcom_slim_ngd_ctrl {
150 struct slim_framer framer;
151 struct slim_controller ctrl;
152 struct qcom_slim_ngd_qmi qmi;
153 struct qcom_slim_ngd *ngd;
154 struct device *dev;
155 void __iomem *base;
156 struct dma_chan *dma_rx_channel;
157 struct dma_chan *dma_tx_channel;
158 struct qcom_slim_ngd_dma_desc rx_desc[QCOM_SLIM_NGD_DESC_NUM];
159 struct qcom_slim_ngd_dma_desc txdesc[QCOM_SLIM_NGD_DESC_NUM];
160 struct completion reconf;
161 struct work_struct m_work;
162 struct work_struct ngd_up_work;
163 struct workqueue_struct *mwq;
164 struct completion qmi_up;
165 spinlock_t tx_buf_lock;
166 struct mutex tx_lock;
167 struct mutex ssr_lock;
168 struct notifier_block nb;
169 void *notifier;
170 struct pdr_handle *pdr;
171 enum qcom_slim_ngd_state state;
172 dma_addr_t rx_phys_base;
173 dma_addr_t tx_phys_base;
174 void *rx_base;
175 void *tx_base;
176 int tx_tail;
177 int tx_head;
178 u32 ver;
179 };
180
181 enum slimbus_mode_enum_type_v01 {
182 /* To force a 32 bit signed enum. Do not change or use*/
183 SLIMBUS_MODE_ENUM_TYPE_MIN_ENUM_VAL_V01 = INT_MIN,
184 SLIMBUS_MODE_SATELLITE_V01 = 1,
185 SLIMBUS_MODE_MASTER_V01 = 2,
186 SLIMBUS_MODE_ENUM_TYPE_MAX_ENUM_VAL_V01 = INT_MAX,
187 };
188
189 enum slimbus_pm_enum_type_v01 {
190 /* To force a 32 bit signed enum. Do not change or use*/
191 SLIMBUS_PM_ENUM_TYPE_MIN_ENUM_VAL_V01 = INT_MIN,
192 SLIMBUS_PM_INACTIVE_V01 = 1,
193 SLIMBUS_PM_ACTIVE_V01 = 2,
194 SLIMBUS_PM_ENUM_TYPE_MAX_ENUM_VAL_V01 = INT_MAX,
195 };
196
197 enum slimbus_resp_enum_type_v01 {
198 SLIMBUS_RESP_ENUM_TYPE_MIN_VAL_V01 = INT_MIN,
199 SLIMBUS_RESP_SYNCHRONOUS_V01 = 1,
200 SLIMBUS_RESP_ENUM_TYPE_MAX_VAL_V01 = INT_MAX,
201 };
202
203 struct slimbus_select_inst_req_msg_v01 {
204 uint32_t instance;
205 uint8_t mode_valid;
206 enum slimbus_mode_enum_type_v01 mode;
207 };
208
209 struct slimbus_select_inst_resp_msg_v01 {
210 struct qmi_response_type_v01 resp;
211 };
212
213 struct slimbus_power_req_msg_v01 {
214 enum slimbus_pm_enum_type_v01 pm_req;
215 uint8_t resp_type_valid;
216 enum slimbus_resp_enum_type_v01 resp_type;
217 };
218
219 struct slimbus_power_resp_msg_v01 {
220 struct qmi_response_type_v01 resp;
221 };
222
223 static struct qmi_elem_info slimbus_select_inst_req_msg_v01_ei[] = {
224 {
225 .data_type = QMI_UNSIGNED_4_BYTE,
226 .elem_len = 1,
227 .elem_size = sizeof(uint32_t),
228 .array_type = NO_ARRAY,
229 .tlv_type = 0x01,
230 .offset = offsetof(struct slimbus_select_inst_req_msg_v01,
231 instance),
232 .ei_array = NULL,
233 },
234 {
235 .data_type = QMI_OPT_FLAG,
236 .elem_len = 1,
237 .elem_size = sizeof(uint8_t),
238 .array_type = NO_ARRAY,
239 .tlv_type = 0x10,
240 .offset = offsetof(struct slimbus_select_inst_req_msg_v01,
241 mode_valid),
242 .ei_array = NULL,
243 },
244 {
245 .data_type = QMI_UNSIGNED_4_BYTE,
246 .elem_len = 1,
247 .elem_size = sizeof(enum slimbus_mode_enum_type_v01),
248 .array_type = NO_ARRAY,
249 .tlv_type = 0x10,
250 .offset = offsetof(struct slimbus_select_inst_req_msg_v01,
251 mode),
252 .ei_array = NULL,
253 },
254 {
255 .data_type = QMI_EOTI,
256 .elem_len = 0,
257 .elem_size = 0,
258 .array_type = NO_ARRAY,
259 .tlv_type = 0x00,
260 .offset = 0,
261 .ei_array = NULL,
262 },
263 };
264
265 static struct qmi_elem_info slimbus_select_inst_resp_msg_v01_ei[] = {
266 {
267 .data_type = QMI_STRUCT,
268 .elem_len = 1,
269 .elem_size = sizeof(struct qmi_response_type_v01),
270 .array_type = NO_ARRAY,
271 .tlv_type = 0x02,
272 .offset = offsetof(struct slimbus_select_inst_resp_msg_v01,
273 resp),
274 .ei_array = qmi_response_type_v01_ei,
275 },
276 {
277 .data_type = QMI_EOTI,
278 .elem_len = 0,
279 .elem_size = 0,
280 .array_type = NO_ARRAY,
281 .tlv_type = 0x00,
282 .offset = 0,
283 .ei_array = NULL,
284 },
285 };
286
287 static struct qmi_elem_info slimbus_power_req_msg_v01_ei[] = {
288 {
289 .data_type = QMI_UNSIGNED_4_BYTE,
290 .elem_len = 1,
291 .elem_size = sizeof(enum slimbus_pm_enum_type_v01),
292 .array_type = NO_ARRAY,
293 .tlv_type = 0x01,
294 .offset = offsetof(struct slimbus_power_req_msg_v01,
295 pm_req),
296 .ei_array = NULL,
297 },
298 {
299 .data_type = QMI_OPT_FLAG,
300 .elem_len = 1,
301 .elem_size = sizeof(uint8_t),
302 .array_type = NO_ARRAY,
303 .tlv_type = 0x10,
304 .offset = offsetof(struct slimbus_power_req_msg_v01,
305 resp_type_valid),
306 },
307 {
308 .data_type = QMI_SIGNED_4_BYTE_ENUM,
309 .elem_len = 1,
310 .elem_size = sizeof(enum slimbus_resp_enum_type_v01),
311 .array_type = NO_ARRAY,
312 .tlv_type = 0x10,
313 .offset = offsetof(struct slimbus_power_req_msg_v01,
314 resp_type),
315 },
316 {
317 .data_type = QMI_EOTI,
318 .elem_len = 0,
319 .elem_size = 0,
320 .array_type = NO_ARRAY,
321 .tlv_type = 0x00,
322 .offset = 0,
323 .ei_array = NULL,
324 },
325 };
326
327 static struct qmi_elem_info slimbus_power_resp_msg_v01_ei[] = {
328 {
329 .data_type = QMI_STRUCT,
330 .elem_len = 1,
331 .elem_size = sizeof(struct qmi_response_type_v01),
332 .array_type = NO_ARRAY,
333 .tlv_type = 0x02,
334 .offset = offsetof(struct slimbus_power_resp_msg_v01, resp),
335 .ei_array = qmi_response_type_v01_ei,
336 },
337 {
338 .data_type = QMI_EOTI,
339 .elem_len = 0,
340 .elem_size = 0,
341 .array_type = NO_ARRAY,
342 .tlv_type = 0x00,
343 .offset = 0,
344 .ei_array = NULL,
345 },
346 };
347
348 static int qcom_slim_qmi_send_select_inst_req(struct qcom_slim_ngd_ctrl *ctrl,
349 struct slimbus_select_inst_req_msg_v01 *req)
350 {
351 struct slimbus_select_inst_resp_msg_v01 resp = { { 0, 0 } };
352 struct qmi_txn txn;
353 int rc;
354
355 rc = qmi_txn_init(ctrl->qmi.handle, &txn,
356 slimbus_select_inst_resp_msg_v01_ei, &resp);
357 if (rc < 0) {
358 dev_err(ctrl->dev, "QMI TXN init fail: %d\n", rc);
359 return rc;
360 }
361
362 rc = qmi_send_request(ctrl->qmi.handle, NULL, &txn,
363 SLIMBUS_QMI_SELECT_INSTANCE_REQ_V01,
364 SLIMBUS_QMI_SELECT_INSTANCE_REQ_MAX_MSG_LEN,
365 slimbus_select_inst_req_msg_v01_ei, req);
366 if (rc < 0) {
367 dev_err(ctrl->dev, "QMI send req fail %d\n", rc);
368 qmi_txn_cancel(&txn);
369 return rc;
370 }
371
372 rc = qmi_txn_wait(&txn, SLIMBUS_QMI_RESP_TOUT);
373 if (rc < 0) {
374 dev_err(ctrl->dev, "QMI TXN wait fail: %d\n", rc);
375 return rc;
376 }
377 /* Check the response */
378 if (resp.resp.result != QMI_RESULT_SUCCESS_V01) {
379 dev_err(ctrl->dev, "QMI request failed 0x%x\n",
380 resp.resp.result);
381 return -EREMOTEIO;
382 }
383
384 return 0;
385 }
386
387 static void qcom_slim_qmi_power_resp_cb(struct qmi_handle *handle,
388 struct sockaddr_qrtr *sq,
389 struct qmi_txn *txn, const void *data)
390 {
391 struct slimbus_power_resp_msg_v01 *resp;
392
393 resp = (struct slimbus_power_resp_msg_v01 *)data;
394 if (resp->resp.result != QMI_RESULT_SUCCESS_V01)
395 pr_err("QMI power request failed 0x%x\n",
396 resp->resp.result);
397
398 complete(&txn->completion);
399 }
400
401 static int qcom_slim_qmi_send_power_request(struct qcom_slim_ngd_ctrl *ctrl,
402 struct slimbus_power_req_msg_v01 *req)
403 {
404 struct slimbus_power_resp_msg_v01 resp = { { 0, 0 } };
405 struct qmi_txn txn;
406 int rc;
407
408 rc = qmi_txn_init(ctrl->qmi.handle, &txn,
409 slimbus_power_resp_msg_v01_ei, &resp);
410
411 rc = qmi_send_request(ctrl->qmi.handle, NULL, &txn,
412 SLIMBUS_QMI_POWER_REQ_V01,
413 SLIMBUS_QMI_POWER_REQ_MAX_MSG_LEN,
414 slimbus_power_req_msg_v01_ei, req);
415 if (rc < 0) {
416 dev_err(ctrl->dev, "QMI send req fail %d\n", rc);
417 qmi_txn_cancel(&txn);
418 return rc;
419 }
420
421 rc = qmi_txn_wait(&txn, SLIMBUS_QMI_RESP_TOUT);
422 if (rc < 0) {
423 dev_err(ctrl->dev, "QMI TXN wait fail: %d\n", rc);
424 return rc;
425 }
426
427 /* Check the response */
428 if (resp.resp.result != QMI_RESULT_SUCCESS_V01) {
429 dev_err(ctrl->dev, "QMI request failed 0x%x\n",
430 resp.resp.result);
431 return -EREMOTEIO;
432 }
433
434 return 0;
435 }
436
437 static const struct qmi_msg_handler qcom_slim_qmi_msg_handlers[] = {
438 {
439 .type = QMI_RESPONSE,
440 .msg_id = SLIMBUS_QMI_POWER_RESP_V01,
441 .ei = slimbus_power_resp_msg_v01_ei,
442 .decoded_size = sizeof(struct slimbus_power_resp_msg_v01),
443 .fn = qcom_slim_qmi_power_resp_cb,
444 },
445 {}
446 };
447
448 static int qcom_slim_qmi_init(struct qcom_slim_ngd_ctrl *ctrl,
449 bool apps_is_master)
450 {
451 struct slimbus_select_inst_req_msg_v01 req;
452 struct qmi_handle *handle;
453 int rc;
454
455 handle = devm_kzalloc(ctrl->dev, sizeof(*handle), GFP_KERNEL);
456 if (!handle)
457 return -ENOMEM;
458
459 rc = qmi_handle_init(handle, SLIMBUS_QMI_POWER_REQ_MAX_MSG_LEN,
460 NULL, qcom_slim_qmi_msg_handlers);
461 if (rc < 0) {
462 dev_err(ctrl->dev, "QMI client init failed: %d\n", rc);
463 goto qmi_handle_init_failed;
464 }
465
466 rc = kernel_connect(handle->sock,
467 (struct sockaddr *)&ctrl->qmi.svc_info,
468 sizeof(ctrl->qmi.svc_info), 0);
469 if (rc < 0) {
470 dev_err(ctrl->dev, "Remote Service connect failed: %d\n", rc);
471 goto qmi_connect_to_service_failed;
472 }
473
474 /* Instance is 0 based */
475 req.instance = (ctrl->ngd->id >> 1);
476 req.mode_valid = 1;
477
478 /* Mode indicates the role of the ADSP */
479 if (apps_is_master)
480 req.mode = SLIMBUS_MODE_SATELLITE_V01;
481 else
482 req.mode = SLIMBUS_MODE_MASTER_V01;
483
484 ctrl->qmi.handle = handle;
485
486 rc = qcom_slim_qmi_send_select_inst_req(ctrl, &req);
487 if (rc) {
488 dev_err(ctrl->dev, "failed to select h/w instance\n");
489 goto qmi_select_instance_failed;
490 }
491
492 return 0;
493
494 qmi_select_instance_failed:
495 ctrl->qmi.handle = NULL;
496 qmi_connect_to_service_failed:
497 qmi_handle_release(handle);
498 qmi_handle_init_failed:
499 devm_kfree(ctrl->dev, handle);
500 return rc;
501 }
502
503 static void qcom_slim_qmi_exit(struct qcom_slim_ngd_ctrl *ctrl)
504 {
505 if (!ctrl->qmi.handle)
506 return;
507
508 qmi_handle_release(ctrl->qmi.handle);
509 devm_kfree(ctrl->dev, ctrl->qmi.handle);
510 ctrl->qmi.handle = NULL;
511 }
512
513 static int qcom_slim_qmi_power_request(struct qcom_slim_ngd_ctrl *ctrl,
514 bool active)
515 {
516 struct slimbus_power_req_msg_v01 req;
517
518 if (active)
519 req.pm_req = SLIMBUS_PM_ACTIVE_V01;
520 else
521 req.pm_req = SLIMBUS_PM_INACTIVE_V01;
522
523 req.resp_type_valid = 0;
524
525 return qcom_slim_qmi_send_power_request(ctrl, &req);
526 }
527
528 static u32 *qcom_slim_ngd_tx_msg_get(struct qcom_slim_ngd_ctrl *ctrl, int len,
529 struct completion *comp)
530 {
531 struct qcom_slim_ngd_dma_desc *desc;
532 unsigned long flags;
533
534 spin_lock_irqsave(&ctrl->tx_buf_lock, flags);
535
536 if ((ctrl->tx_tail + 1) % QCOM_SLIM_NGD_DESC_NUM == ctrl->tx_head) {
537 spin_unlock_irqrestore(&ctrl->tx_buf_lock, flags);
538 return NULL;
539 }
540 desc = &ctrl->txdesc[ctrl->tx_tail];
541 desc->base = ctrl->tx_base + ctrl->tx_tail * SLIM_MSGQ_BUF_LEN;
542 desc->comp = comp;
543 ctrl->tx_tail = (ctrl->tx_tail + 1) % QCOM_SLIM_NGD_DESC_NUM;
544
545 spin_unlock_irqrestore(&ctrl->tx_buf_lock, flags);
546
547 return desc->base;
548 }
549
550 static void qcom_slim_ngd_tx_msg_dma_cb(void *args)
551 {
552 struct qcom_slim_ngd_dma_desc *desc = args;
553 struct qcom_slim_ngd_ctrl *ctrl = desc->ctrl;
554 unsigned long flags;
555
556 spin_lock_irqsave(&ctrl->tx_buf_lock, flags);
557
558 if (desc->comp) {
559 complete(desc->comp);
560 desc->comp = NULL;
561 }
562
563 ctrl->tx_head = (ctrl->tx_head + 1) % QCOM_SLIM_NGD_DESC_NUM;
564 spin_unlock_irqrestore(&ctrl->tx_buf_lock, flags);
565 }
566
567 static int qcom_slim_ngd_tx_msg_post(struct qcom_slim_ngd_ctrl *ctrl,
568 void *buf, int len)
569 {
570 struct qcom_slim_ngd_dma_desc *desc;
571 unsigned long flags;
572 int index, offset;
573
574 spin_lock_irqsave(&ctrl->tx_buf_lock, flags);
575 offset = buf - ctrl->tx_base;
576 index = offset/SLIM_MSGQ_BUF_LEN;
577
578 desc = &ctrl->txdesc[index];
579 desc->phys = ctrl->tx_phys_base + offset;
580 desc->base = ctrl->tx_base + offset;
581 desc->ctrl = ctrl;
582 len = (len + 3) & 0xfc;
583
584 desc->desc = dmaengine_prep_slave_single(ctrl->dma_tx_channel,
585 desc->phys, len,
586 DMA_MEM_TO_DEV,
587 DMA_PREP_INTERRUPT);
588 if (!desc->desc) {
589 dev_err(ctrl->dev, "unable to prepare channel\n");
590 spin_unlock_irqrestore(&ctrl->tx_buf_lock, flags);
591 return -EINVAL;
592 }
593
594 desc->desc->callback = qcom_slim_ngd_tx_msg_dma_cb;
595 desc->desc->callback_param = desc;
596 desc->desc->cookie = dmaengine_submit(desc->desc);
597 dma_async_issue_pending(ctrl->dma_tx_channel);
598 spin_unlock_irqrestore(&ctrl->tx_buf_lock, flags);
599
600 return 0;
601 }
602
603 static void qcom_slim_ngd_rx(struct qcom_slim_ngd_ctrl *ctrl, u8 *buf)
604 {
605 u8 mc, mt, len;
606
607 mt = SLIM_HEADER_GET_MT(buf[0]);
608 len = SLIM_HEADER_GET_RL(buf[0]);
609 mc = SLIM_HEADER_GET_MC(buf[1]);
610
611 if (mc == SLIM_USR_MC_MASTER_CAPABILITY &&
612 mt == SLIM_MSG_MT_SRC_REFERRED_USER)
613 queue_work(ctrl->mwq, &ctrl->m_work);
614
615 if (mc == SLIM_MSG_MC_REPLY_INFORMATION ||
616 mc == SLIM_MSG_MC_REPLY_VALUE || (mc == SLIM_USR_MC_ADDR_REPLY &&
617 mt == SLIM_MSG_MT_SRC_REFERRED_USER) ||
618 (mc == SLIM_USR_MC_GENERIC_ACK &&
619 mt == SLIM_MSG_MT_SRC_REFERRED_USER)) {
620 slim_msg_response(&ctrl->ctrl, &buf[4], buf[3], len - 4);
621 pm_runtime_mark_last_busy(ctrl->dev);
622 }
623 }
624
625 static void qcom_slim_ngd_rx_msgq_cb(void *args)
626 {
627 struct qcom_slim_ngd_dma_desc *desc = args;
628 struct qcom_slim_ngd_ctrl *ctrl = desc->ctrl;
629
630 qcom_slim_ngd_rx(ctrl, (u8 *)desc->base);
631 /* Add descriptor back to the queue */
632 desc->desc = dmaengine_prep_slave_single(ctrl->dma_rx_channel,
633 desc->phys, SLIM_MSGQ_BUF_LEN,
634 DMA_DEV_TO_MEM,
635 DMA_PREP_INTERRUPT);
636 if (!desc->desc) {
637 dev_err(ctrl->dev, "Unable to prepare rx channel\n");
638 return;
639 }
640
641 desc->desc->callback = qcom_slim_ngd_rx_msgq_cb;
642 desc->desc->callback_param = desc;
643 desc->desc->cookie = dmaengine_submit(desc->desc);
644 dma_async_issue_pending(ctrl->dma_rx_channel);
645 }
646
647 static int qcom_slim_ngd_post_rx_msgq(struct qcom_slim_ngd_ctrl *ctrl)
648 {
649 struct qcom_slim_ngd_dma_desc *desc;
650 int i;
651
652 for (i = 0; i < QCOM_SLIM_NGD_DESC_NUM; i++) {
653 desc = &ctrl->rx_desc[i];
654 desc->phys = ctrl->rx_phys_base + i * SLIM_MSGQ_BUF_LEN;
655 desc->ctrl = ctrl;
656 desc->base = ctrl->rx_base + i * SLIM_MSGQ_BUF_LEN;
657 desc->desc = dmaengine_prep_slave_single(ctrl->dma_rx_channel,
658 desc->phys, SLIM_MSGQ_BUF_LEN,
659 DMA_DEV_TO_MEM,
660 DMA_PREP_INTERRUPT);
661 if (!desc->desc) {
662 dev_err(ctrl->dev, "Unable to prepare rx channel\n");
663 return -EINVAL;
664 }
665
666 desc->desc->callback = qcom_slim_ngd_rx_msgq_cb;
667 desc->desc->callback_param = desc;
668 desc->desc->cookie = dmaengine_submit(desc->desc);
669 }
670 dma_async_issue_pending(ctrl->dma_rx_channel);
671
672 return 0;
673 }
674
675 static int qcom_slim_ngd_init_rx_msgq(struct qcom_slim_ngd_ctrl *ctrl)
676 {
677 struct device *dev = ctrl->dev;
678 int ret, size;
679
680 ctrl->dma_rx_channel = dma_request_chan(dev, "rx");
681 if (IS_ERR(ctrl->dma_rx_channel)) {
682 dev_err(dev, "Failed to request RX dma channel");
683 ret = PTR_ERR(ctrl->dma_rx_channel);
684 ctrl->dma_rx_channel = NULL;
685 return ret;
686 }
687
688 size = QCOM_SLIM_NGD_DESC_NUM * SLIM_MSGQ_BUF_LEN;
689 ctrl->rx_base = dma_alloc_coherent(dev, size, &ctrl->rx_phys_base,
690 GFP_KERNEL);
691 if (!ctrl->rx_base) {
692 ret = -ENOMEM;
693 goto rel_rx;
694 }
695
696 ret = qcom_slim_ngd_post_rx_msgq(ctrl);
697 if (ret) {
698 dev_err(dev, "post_rx_msgq() failed 0x%x\n", ret);
699 goto rx_post_err;
700 }
701
702 return 0;
703
704 rx_post_err:
705 dma_free_coherent(dev, size, ctrl->rx_base, ctrl->rx_phys_base);
706 rel_rx:
707 dma_release_channel(ctrl->dma_rx_channel);
708 return ret;
709 }
710
711 static int qcom_slim_ngd_init_tx_msgq(struct qcom_slim_ngd_ctrl *ctrl)
712 {
713 struct device *dev = ctrl->dev;
714 unsigned long flags;
715 int ret = 0;
716 int size;
717
718 ctrl->dma_tx_channel = dma_request_chan(dev, "tx");
719 if (IS_ERR(ctrl->dma_tx_channel)) {
720 dev_err(dev, "Failed to request TX dma channel");
721 ret = PTR_ERR(ctrl->dma_tx_channel);
722 ctrl->dma_tx_channel = NULL;
723 return ret;
724 }
725
726 size = ((QCOM_SLIM_NGD_DESC_NUM + 1) * SLIM_MSGQ_BUF_LEN);
727 ctrl->tx_base = dma_alloc_coherent(dev, size, &ctrl->tx_phys_base,
728 GFP_KERNEL);
729 if (!ctrl->tx_base) {
730 ret = -EINVAL;
731 goto rel_tx;
732 }
733
734 spin_lock_irqsave(&ctrl->tx_buf_lock, flags);
735 ctrl->tx_tail = 0;
736 ctrl->tx_head = 0;
737 spin_unlock_irqrestore(&ctrl->tx_buf_lock, flags);
738
739 return 0;
740 rel_tx:
741 dma_release_channel(ctrl->dma_tx_channel);
742 return ret;
743 }
744
745 static int qcom_slim_ngd_init_dma(struct qcom_slim_ngd_ctrl *ctrl)
746 {
747 int ret = 0;
748
749 ret = qcom_slim_ngd_init_rx_msgq(ctrl);
750 if (ret) {
751 dev_err(ctrl->dev, "rx dma init failed\n");
752 return ret;
753 }
754
755 ret = qcom_slim_ngd_init_tx_msgq(ctrl);
756 if (ret)
757 dev_err(ctrl->dev, "tx dma init failed\n");
758
759 return ret;
760 }
761
762 static irqreturn_t qcom_slim_ngd_interrupt(int irq, void *d)
763 {
764 struct qcom_slim_ngd_ctrl *ctrl = d;
765 void __iomem *base = ctrl->ngd->base;
766 u32 stat = readl(base + NGD_INT_STAT);
767
768 if ((stat & NGD_INT_MSG_BUF_CONTE) ||
769 (stat & NGD_INT_MSG_TX_INVAL) || (stat & NGD_INT_DEV_ERR) ||
770 (stat & NGD_INT_TX_NACKED_2)) {
771 dev_err(ctrl->dev, "Error Interrupt received 0x%x\n", stat);
772 }
773
774 writel(stat, base + NGD_INT_CLR);
775
776 return IRQ_HANDLED;
777 }
778
779 static int qcom_slim_ngd_xfer_msg(struct slim_controller *sctrl,
780 struct slim_msg_txn *txn)
781 {
782 struct qcom_slim_ngd_ctrl *ctrl = dev_get_drvdata(sctrl->dev);
783 DECLARE_COMPLETION_ONSTACK(tx_sent);
784 DECLARE_COMPLETION_ONSTACK(done);
785 int ret, timeout, i;
786 u8 wbuf[SLIM_MSGQ_BUF_LEN];
787 u8 rbuf[SLIM_MSGQ_BUF_LEN];
788 u32 *pbuf;
789 u8 *puc;
790 u8 la = txn->la;
791 bool usr_msg = false;
792
793 if (txn->mt == SLIM_MSG_MT_CORE &&
794 (txn->mc >= SLIM_MSG_MC_BEGIN_RECONFIGURATION &&
795 txn->mc <= SLIM_MSG_MC_RECONFIGURE_NOW))
796 return 0;
797
798 if (txn->dt == SLIM_MSG_DEST_ENUMADDR)
799 return -EPROTONOSUPPORT;
800
801 if (txn->msg->num_bytes > SLIM_MSGQ_BUF_LEN ||
802 txn->rl > SLIM_MSGQ_BUF_LEN) {
803 dev_err(ctrl->dev, "msg exceeds HW limit\n");
804 return -EINVAL;
805 }
806
807 pbuf = qcom_slim_ngd_tx_msg_get(ctrl, txn->rl, &tx_sent);
808 if (!pbuf) {
809 dev_err(ctrl->dev, "Message buffer unavailable\n");
810 return -ENOMEM;
811 }
812
813 if (txn->mt == SLIM_MSG_MT_CORE &&
814 (txn->mc == SLIM_MSG_MC_CONNECT_SOURCE ||
815 txn->mc == SLIM_MSG_MC_CONNECT_SINK ||
816 txn->mc == SLIM_MSG_MC_DISCONNECT_PORT)) {
817 txn->mt = SLIM_MSG_MT_DEST_REFERRED_USER;
818 switch (txn->mc) {
819 case SLIM_MSG_MC_CONNECT_SOURCE:
820 txn->mc = SLIM_USR_MC_CONNECT_SRC;
821 break;
822 case SLIM_MSG_MC_CONNECT_SINK:
823 txn->mc = SLIM_USR_MC_CONNECT_SINK;
824 break;
825 case SLIM_MSG_MC_DISCONNECT_PORT:
826 txn->mc = SLIM_USR_MC_DISCONNECT_PORT;
827 break;
828 default:
829 return -EINVAL;
830 }
831
832 usr_msg = true;
833 i = 0;
834 wbuf[i++] = txn->la;
835 la = SLIM_LA_MGR;
836 wbuf[i++] = txn->msg->wbuf[0];
837 if (txn->mc != SLIM_USR_MC_DISCONNECT_PORT)
838 wbuf[i++] = txn->msg->wbuf[1];
839
840 txn->comp = &done;
841 ret = slim_alloc_txn_tid(sctrl, txn);
842 if (ret) {
843 dev_err(ctrl->dev, "Unable to allocate TID\n");
844 return ret;
845 }
846
847 wbuf[i++] = txn->tid;
848
849 txn->msg->num_bytes = i;
850 txn->msg->wbuf = wbuf;
851 txn->msg->rbuf = rbuf;
852 txn->rl = txn->msg->num_bytes + 4;
853 }
854
855 /* HW expects length field to be excluded */
856 txn->rl--;
857 puc = (u8 *)pbuf;
858 *pbuf = 0;
859 if (txn->dt == SLIM_MSG_DEST_LOGICALADDR) {
860 *pbuf = SLIM_MSG_ASM_FIRST_WORD(txn->rl, txn->mt, txn->mc, 0,
861 la);
862 puc += 3;
863 } else {
864 *pbuf = SLIM_MSG_ASM_FIRST_WORD(txn->rl, txn->mt, txn->mc, 1,
865 la);
866 puc += 2;
867 }
868
869 if (slim_tid_txn(txn->mt, txn->mc))
870 *(puc++) = txn->tid;
871
872 if (slim_ec_txn(txn->mt, txn->mc)) {
873 *(puc++) = (txn->ec & 0xFF);
874 *(puc++) = (txn->ec >> 8) & 0xFF;
875 }
876
877 if (txn->msg && txn->msg->wbuf)
878 memcpy(puc, txn->msg->wbuf, txn->msg->num_bytes);
879
880 mutex_lock(&ctrl->tx_lock);
881 ret = qcom_slim_ngd_tx_msg_post(ctrl, pbuf, txn->rl);
882 if (ret) {
883 mutex_unlock(&ctrl->tx_lock);
884 return ret;
885 }
886
887 timeout = wait_for_completion_timeout(&tx_sent, HZ);
888 if (!timeout) {
889 dev_err(sctrl->dev, "TX timed out:MC:0x%x,mt:0x%x", txn->mc,
890 txn->mt);
891 mutex_unlock(&ctrl->tx_lock);
892 return -ETIMEDOUT;
893 }
894
895 if (usr_msg) {
896 timeout = wait_for_completion_timeout(&done, HZ);
897 if (!timeout) {
898 dev_err(sctrl->dev, "TX timed out:MC:0x%x,mt:0x%x",
899 txn->mc, txn->mt);
900 mutex_unlock(&ctrl->tx_lock);
901 return -ETIMEDOUT;
902 }
903 }
904
905 mutex_unlock(&ctrl->tx_lock);
906 return 0;
907 }
908
909 static int qcom_slim_ngd_xfer_msg_sync(struct slim_controller *ctrl,
910 struct slim_msg_txn *txn)
911 {
912 DECLARE_COMPLETION_ONSTACK(done);
913 int ret, timeout;
914
915 pm_runtime_get_sync(ctrl->dev);
916
917 txn->comp = &done;
918
919 ret = qcom_slim_ngd_xfer_msg(ctrl, txn);
920 if (ret)
921 return ret;
922
923 timeout = wait_for_completion_timeout(&done, HZ);
924 if (!timeout) {
925 dev_err(ctrl->dev, "TX timed out:MC:0x%x,mt:0x%x", txn->mc,
926 txn->mt);
927 return -ETIMEDOUT;
928 }
929 return 0;
930 }
931
932 static int qcom_slim_ngd_enable_stream(struct slim_stream_runtime *rt)
933 {
934 struct slim_device *sdev = rt->dev;
935 struct slim_controller *ctrl = sdev->ctrl;
936 struct slim_val_inf msg = {0};
937 u8 wbuf[SLIM_MSGQ_BUF_LEN];
938 u8 rbuf[SLIM_MSGQ_BUF_LEN];
939 struct slim_msg_txn txn = {0,};
940 int i, ret;
941
942 txn.mt = SLIM_MSG_MT_DEST_REFERRED_USER;
943 txn.dt = SLIM_MSG_DEST_LOGICALADDR;
944 txn.la = SLIM_LA_MGR;
945 txn.ec = 0;
946 txn.msg = &msg;
947 txn.msg->num_bytes = 0;
948 txn.msg->wbuf = wbuf;
949 txn.msg->rbuf = rbuf;
950
951 for (i = 0; i < rt->num_ports; i++) {
952 struct slim_port *port = &rt->ports[i];
953
954 if (txn.msg->num_bytes == 0) {
955 int seg_interval = SLIM_SLOTS_PER_SUPERFRAME/rt->ratem;
956 int exp;
957
958 wbuf[txn.msg->num_bytes++] = sdev->laddr;
959 wbuf[txn.msg->num_bytes] = rt->bps >> 2 |
960 (port->ch.aux_fmt << 6);
961
962 /* Data channel segment interval not multiple of 3 */
963 exp = seg_interval % 3;
964 if (exp)
965 wbuf[txn.msg->num_bytes] |= BIT(5);
966
967 txn.msg->num_bytes++;
968 wbuf[txn.msg->num_bytes++] = exp << 4 | rt->prot;
969
970 if (rt->prot == SLIM_PROTO_ISO)
971 wbuf[txn.msg->num_bytes++] =
972 port->ch.prrate |
973 SLIM_CHANNEL_CONTENT_FL;
974 else
975 wbuf[txn.msg->num_bytes++] = port->ch.prrate;
976
977 ret = slim_alloc_txn_tid(ctrl, &txn);
978 if (ret) {
979 dev_err(&sdev->dev, "Fail to allocate TID\n");
980 return -ENXIO;
981 }
982 wbuf[txn.msg->num_bytes++] = txn.tid;
983 }
984 wbuf[txn.msg->num_bytes++] = port->ch.id;
985 }
986
987 txn.mc = SLIM_USR_MC_DEF_ACT_CHAN;
988 txn.rl = txn.msg->num_bytes + 4;
989 ret = qcom_slim_ngd_xfer_msg_sync(ctrl, &txn);
990 if (ret) {
991 slim_free_txn_tid(ctrl, &txn);
992 dev_err(&sdev->dev, "TX timed out:MC:0x%x,mt:0x%x", txn.mc,
993 txn.mt);
994 return ret;
995 }
996
997 txn.mc = SLIM_USR_MC_RECONFIG_NOW;
998 txn.msg->num_bytes = 2;
999 wbuf[1] = sdev->laddr;
1000 txn.rl = txn.msg->num_bytes + 4;
1001
1002 ret = slim_alloc_txn_tid(ctrl, &txn);
1003 if (ret) {
1004 dev_err(ctrl->dev, "Fail to allocate TID\n");
1005 return ret;
1006 }
1007
1008 wbuf[0] = txn.tid;
1009 ret = qcom_slim_ngd_xfer_msg_sync(ctrl, &txn);
1010 if (ret) {
1011 slim_free_txn_tid(ctrl, &txn);
1012 dev_err(&sdev->dev, "TX timed out:MC:0x%x,mt:0x%x", txn.mc,
1013 txn.mt);
1014 }
1015
1016 return ret;
1017 }
1018
1019 static int qcom_slim_ngd_get_laddr(struct slim_controller *ctrl,
1020 struct slim_eaddr *ea, u8 *laddr)
1021 {
1022 struct slim_val_inf msg = {0};
1023 u8 failed_ea[6] = {0, 0, 0, 0, 0, 0};
1024 struct slim_msg_txn txn;
1025 u8 wbuf[10] = {0};
1026 u8 rbuf[10] = {0};
1027 int ret;
1028
1029 txn.mt = SLIM_MSG_MT_DEST_REFERRED_USER;
1030 txn.dt = SLIM_MSG_DEST_LOGICALADDR;
1031 txn.la = SLIM_LA_MGR;
1032 txn.ec = 0;
1033
1034 txn.mc = SLIM_USR_MC_ADDR_QUERY;
1035 txn.rl = 11;
1036 txn.msg = &msg;
1037 txn.msg->num_bytes = 7;
1038 txn.msg->wbuf = wbuf;
1039 txn.msg->rbuf = rbuf;
1040
1041 ret = slim_alloc_txn_tid(ctrl, &txn);
1042 if (ret < 0)
1043 return ret;
1044
1045 wbuf[0] = (u8)txn.tid;
1046 memcpy(&wbuf[1], ea, sizeof(*ea));
1047
1048 ret = qcom_slim_ngd_xfer_msg_sync(ctrl, &txn);
1049 if (ret) {
1050 slim_free_txn_tid(ctrl, &txn);
1051 return ret;
1052 }
1053
1054 if (!memcmp(rbuf, failed_ea, 6))
1055 return -ENXIO;
1056
1057 *laddr = rbuf[6];
1058
1059 return ret;
1060 }
1061
1062 static int qcom_slim_ngd_exit_dma(struct qcom_slim_ngd_ctrl *ctrl)
1063 {
1064 if (ctrl->dma_rx_channel) {
1065 dmaengine_terminate_sync(ctrl->dma_rx_channel);
1066 dma_release_channel(ctrl->dma_rx_channel);
1067 }
1068
1069 if (ctrl->dma_tx_channel) {
1070 dmaengine_terminate_sync(ctrl->dma_tx_channel);
1071 dma_release_channel(ctrl->dma_tx_channel);
1072 }
1073
1074 ctrl->dma_tx_channel = ctrl->dma_rx_channel = NULL;
1075
1076 return 0;
1077 }
1078
1079 static void qcom_slim_ngd_setup(struct qcom_slim_ngd_ctrl *ctrl)
1080 {
1081 u32 cfg = readl_relaxed(ctrl->ngd->base);
1082
1083 if (ctrl->state == QCOM_SLIM_NGD_CTRL_DOWN)
1084 qcom_slim_ngd_init_dma(ctrl);
1085
1086 /* By default enable message queues */
1087 cfg |= NGD_CFG_RX_MSGQ_EN;
1088 cfg |= NGD_CFG_TX_MSGQ_EN;
1089
1090 /* Enable NGD if it's not already enabled*/
1091 if (!(cfg & NGD_CFG_ENABLE))
1092 cfg |= NGD_CFG_ENABLE;
1093
1094 writel_relaxed(cfg, ctrl->ngd->base);
1095 }
1096
1097 static int qcom_slim_ngd_power_up(struct qcom_slim_ngd_ctrl *ctrl)
1098 {
1099 enum qcom_slim_ngd_state cur_state = ctrl->state;
1100 struct qcom_slim_ngd *ngd = ctrl->ngd;
1101 u32 laddr, rx_msgq;
1102 int timeout, ret = 0;
1103
1104 if (ctrl->state == QCOM_SLIM_NGD_CTRL_DOWN) {
1105 timeout = wait_for_completion_timeout(&ctrl->qmi.qmi_comp, HZ);
1106 if (!timeout)
1107 return -EREMOTEIO;
1108 }
1109
1110 if (ctrl->state == QCOM_SLIM_NGD_CTRL_ASLEEP ||
1111 ctrl->state == QCOM_SLIM_NGD_CTRL_DOWN) {
1112 ret = qcom_slim_qmi_power_request(ctrl, true);
1113 if (ret) {
1114 dev_err(ctrl->dev, "SLIM QMI power request failed:%d\n",
1115 ret);
1116 return ret;
1117 }
1118 }
1119
1120 ctrl->ver = readl_relaxed(ctrl->base);
1121 /* Version info in 16 MSbits */
1122 ctrl->ver >>= 16;
1123
1124 laddr = readl_relaxed(ngd->base + NGD_STATUS);
1125 if (laddr & NGD_LADDR) {
1126 /*
1127 * external MDM restart case where ADSP itself was active framer
1128 * For example, modem restarted when playback was active
1129 */
1130 if (cur_state == QCOM_SLIM_NGD_CTRL_AWAKE) {
1131 dev_info(ctrl->dev, "Subsys restart: ADSP active framer\n");
1132 return 0;
1133 }
1134 return 0;
1135 }
1136
1137 writel_relaxed(DEF_NGD_INT_MASK, ngd->base + NGD_INT_EN);
1138 rx_msgq = readl_relaxed(ngd->base + NGD_RX_MSGQ_CFG);
1139
1140 writel_relaxed(rx_msgq|SLIM_RX_MSGQ_TIMEOUT_VAL,
1141 ngd->base + NGD_RX_MSGQ_CFG);
1142 qcom_slim_ngd_setup(ctrl);
1143
1144 timeout = wait_for_completion_timeout(&ctrl->reconf, HZ);
1145 if (!timeout) {
1146 dev_err(ctrl->dev, "capability exchange timed-out\n");
1147 return -ETIMEDOUT;
1148 }
1149
1150 return 0;
1151 }
1152
1153 static void qcom_slim_ngd_notify_slaves(struct qcom_slim_ngd_ctrl *ctrl)
1154 {
1155 struct slim_device *sbdev;
1156 struct device_node *node;
1157
1158 for_each_child_of_node(ctrl->ngd->pdev->dev.of_node, node) {
1159 sbdev = of_slim_get_device(&ctrl->ctrl, node);
1160 if (!sbdev)
1161 continue;
1162
1163 if (slim_get_logical_addr(sbdev))
1164 dev_err(ctrl->dev, "Failed to get logical address\n");
1165 }
1166 }
1167
1168 static void qcom_slim_ngd_master_worker(struct work_struct *work)
1169 {
1170 struct qcom_slim_ngd_ctrl *ctrl;
1171 struct slim_msg_txn txn;
1172 struct slim_val_inf msg = {0};
1173 int retries = 0;
1174 u8 wbuf[8];
1175 int ret = 0;
1176
1177 ctrl = container_of(work, struct qcom_slim_ngd_ctrl, m_work);
1178 txn.dt = SLIM_MSG_DEST_LOGICALADDR;
1179 txn.ec = 0;
1180 txn.mc = SLIM_USR_MC_REPORT_SATELLITE;
1181 txn.mt = SLIM_MSG_MT_SRC_REFERRED_USER;
1182 txn.la = SLIM_LA_MGR;
1183 wbuf[0] = SAT_MAGIC_LSB;
1184 wbuf[1] = SAT_MAGIC_MSB;
1185 wbuf[2] = SAT_MSG_VER;
1186 wbuf[3] = SAT_MSG_PROT;
1187 txn.msg = &msg;
1188 txn.msg->wbuf = wbuf;
1189 txn.msg->num_bytes = 4;
1190 txn.rl = 8;
1191
1192 dev_info(ctrl->dev, "SLIM SAT: Rcvd master capability\n");
1193
1194 capability_retry:
1195 ret = qcom_slim_ngd_xfer_msg(&ctrl->ctrl, &txn);
1196 if (!ret) {
1197 if (ctrl->state >= QCOM_SLIM_NGD_CTRL_ASLEEP)
1198 complete(&ctrl->reconf);
1199 else
1200 dev_err(ctrl->dev, "unexpected state:%d\n",
1201 ctrl->state);
1202
1203 if (ctrl->state == QCOM_SLIM_NGD_CTRL_DOWN)
1204 qcom_slim_ngd_notify_slaves(ctrl);
1205
1206 } else if (ret == -EIO) {
1207 dev_err(ctrl->dev, "capability message NACKed, retrying\n");
1208 if (retries < INIT_MX_RETRIES) {
1209 msleep(DEF_RETRY_MS);
1210 retries++;
1211 goto capability_retry;
1212 }
1213 } else {
1214 dev_err(ctrl->dev, "SLIM: capability TX failed:%d\n", ret);
1215 }
1216 }
1217
1218 static int qcom_slim_ngd_update_device_status(struct device *dev, void *null)
1219 {
1220 slim_report_absent(to_slim_device(dev));
1221
1222 return 0;
1223 }
1224
1225 static int qcom_slim_ngd_runtime_resume(struct device *dev)
1226 {
1227 struct qcom_slim_ngd_ctrl *ctrl = dev_get_drvdata(dev);
1228 int ret = 0;
1229
1230 if (!ctrl->qmi.handle)
1231 return 0;
1232
1233 if (ctrl->state >= QCOM_SLIM_NGD_CTRL_ASLEEP)
1234 ret = qcom_slim_ngd_power_up(ctrl);
1235 if (ret) {
1236 /* Did SSR cause this power up failure */
1237 if (ctrl->state != QCOM_SLIM_NGD_CTRL_DOWN)
1238 ctrl->state = QCOM_SLIM_NGD_CTRL_ASLEEP;
1239 else
1240 dev_err(ctrl->dev, "HW wakeup attempt during SSR\n");
1241 } else {
1242 ctrl->state = QCOM_SLIM_NGD_CTRL_AWAKE;
1243 }
1244
1245 return 0;
1246 }
1247
1248 static int qcom_slim_ngd_enable(struct qcom_slim_ngd_ctrl *ctrl, bool enable)
1249 {
1250 if (enable) {
1251 int ret = qcom_slim_qmi_init(ctrl, false);
1252
1253 if (ret) {
1254 dev_err(ctrl->dev, "qmi init fail, ret:%d, state:%d\n",
1255 ret, ctrl->state);
1256 return ret;
1257 }
1258 /* controller state should be in sync with framework state */
1259 complete(&ctrl->qmi.qmi_comp);
1260 if (!pm_runtime_enabled(ctrl->dev) ||
1261 !pm_runtime_suspended(ctrl->dev))
1262 qcom_slim_ngd_runtime_resume(ctrl->dev);
1263 else
1264 pm_runtime_resume(ctrl->dev);
1265 pm_runtime_mark_last_busy(ctrl->dev);
1266 pm_runtime_put(ctrl->dev);
1267
1268 ret = slim_register_controller(&ctrl->ctrl);
1269 if (ret) {
1270 dev_err(ctrl->dev, "error adding slim controller\n");
1271 return ret;
1272 }
1273
1274 dev_info(ctrl->dev, "SLIM controller Registered\n");
1275 } else {
1276 qcom_slim_qmi_exit(ctrl);
1277 slim_unregister_controller(&ctrl->ctrl);
1278 }
1279
1280 return 0;
1281 }
1282
1283 static int qcom_slim_ngd_qmi_new_server(struct qmi_handle *hdl,
1284 struct qmi_service *service)
1285 {
1286 struct qcom_slim_ngd_qmi *qmi =
1287 container_of(hdl, struct qcom_slim_ngd_qmi, svc_event_hdl);
1288 struct qcom_slim_ngd_ctrl *ctrl =
1289 container_of(qmi, struct qcom_slim_ngd_ctrl, qmi);
1290
1291 qmi->svc_info.sq_family = AF_QIPCRTR;
1292 qmi->svc_info.sq_node = service->node;
1293 qmi->svc_info.sq_port = service->port;
1294
1295 complete(&ctrl->qmi_up);
1296
1297 return 0;
1298 }
1299
1300 static void qcom_slim_ngd_qmi_del_server(struct qmi_handle *hdl,
1301 struct qmi_service *service)
1302 {
1303 struct qcom_slim_ngd_qmi *qmi =
1304 container_of(hdl, struct qcom_slim_ngd_qmi, svc_event_hdl);
1305 struct qcom_slim_ngd_ctrl *ctrl =
1306 container_of(qmi, struct qcom_slim_ngd_ctrl, qmi);
1307
1308 reinit_completion(&ctrl->qmi_up);
1309 qmi->svc_info.sq_node = 0;
1310 qmi->svc_info.sq_port = 0;
1311 }
1312
1313 static const struct qmi_ops qcom_slim_ngd_qmi_svc_event_ops = {
1314 .new_server = qcom_slim_ngd_qmi_new_server,
1315 .del_server = qcom_slim_ngd_qmi_del_server,
1316 };
1317
1318 static int qcom_slim_ngd_qmi_svc_event_init(struct qcom_slim_ngd_ctrl *ctrl)
1319 {
1320 struct qcom_slim_ngd_qmi *qmi = &ctrl->qmi;
1321 int ret;
1322
1323 ret = qmi_handle_init(&qmi->svc_event_hdl, 0,
1324 &qcom_slim_ngd_qmi_svc_event_ops, NULL);
1325 if (ret < 0) {
1326 dev_err(ctrl->dev, "qmi_handle_init failed: %d\n", ret);
1327 return ret;
1328 }
1329
1330 ret = qmi_add_lookup(&qmi->svc_event_hdl, SLIMBUS_QMI_SVC_ID,
1331 SLIMBUS_QMI_SVC_V1, SLIMBUS_QMI_INS_ID);
1332 if (ret < 0) {
1333 dev_err(ctrl->dev, "qmi_add_lookup failed: %d\n", ret);
1334 qmi_handle_release(&qmi->svc_event_hdl);
1335 }
1336 return ret;
1337 }
1338
1339 static void qcom_slim_ngd_qmi_svc_event_deinit(struct qcom_slim_ngd_qmi *qmi)
1340 {
1341 qmi_handle_release(&qmi->svc_event_hdl);
1342 }
1343
1344 static struct platform_driver qcom_slim_ngd_driver;
1345 #define QCOM_SLIM_NGD_DRV_NAME "qcom,slim-ngd"
1346
1347 static const struct of_device_id qcom_slim_ngd_dt_match[] = {
1348 {
1349 .compatible = "qcom,slim-ngd-v1.5.0",
1350 .data = &ngd_v1_5_offset_info,
1351 },{
1352 .compatible = "qcom,slim-ngd-v2.1.0",
1353 .data = &ngd_v1_5_offset_info,
1354 },
1355 {}
1356 };
1357
1358 MODULE_DEVICE_TABLE(of, qcom_slim_ngd_dt_match);
1359
1360 static void qcom_slim_ngd_down(struct qcom_slim_ngd_ctrl *ctrl)
1361 {
1362 mutex_lock(&ctrl->ssr_lock);
1363 device_for_each_child(ctrl->ctrl.dev, NULL,
1364 qcom_slim_ngd_update_device_status);
1365 qcom_slim_ngd_enable(ctrl, false);
1366 mutex_unlock(&ctrl->ssr_lock);
1367 }
1368
1369 static void qcom_slim_ngd_up_worker(struct work_struct *work)
1370 {
1371 struct qcom_slim_ngd_ctrl *ctrl;
1372
1373 ctrl = container_of(work, struct qcom_slim_ngd_ctrl, ngd_up_work);
1374
1375 /* Make sure qmi service is up before continuing */
1376 wait_for_completion_interruptible(&ctrl->qmi_up);
1377
1378 mutex_lock(&ctrl->ssr_lock);
1379 qcom_slim_ngd_enable(ctrl, true);
1380 mutex_unlock(&ctrl->ssr_lock);
1381 }
1382
1383 static int qcom_slim_ngd_ssr_pdr_notify(struct qcom_slim_ngd_ctrl *ctrl,
1384 unsigned long action)
1385 {
1386 switch (action) {
1387 case QCOM_SSR_BEFORE_SHUTDOWN:
1388 case SERVREG_SERVICE_STATE_DOWN:
1389 /* Make sure the last dma xfer is finished */
1390 mutex_lock(&ctrl->tx_lock);
1391 if (ctrl->state != QCOM_SLIM_NGD_CTRL_DOWN) {
1392 pm_runtime_get_noresume(ctrl->dev);
1393 ctrl->state = QCOM_SLIM_NGD_CTRL_DOWN;
1394 qcom_slim_ngd_down(ctrl);
1395 qcom_slim_ngd_exit_dma(ctrl);
1396 }
1397 mutex_unlock(&ctrl->tx_lock);
1398 break;
1399 case QCOM_SSR_AFTER_POWERUP:
1400 case SERVREG_SERVICE_STATE_UP:
1401 schedule_work(&ctrl->ngd_up_work);
1402 break;
1403 default:
1404 break;
1405 }
1406
1407 return NOTIFY_OK;
1408 }
1409
1410 static int qcom_slim_ngd_ssr_notify(struct notifier_block *nb,
1411 unsigned long action,
1412 void *data)
1413 {
1414 struct qcom_slim_ngd_ctrl *ctrl = container_of(nb,
1415 struct qcom_slim_ngd_ctrl, nb);
1416
1417 return qcom_slim_ngd_ssr_pdr_notify(ctrl, action);
1418 }
1419
1420 static void slim_pd_status(int state, char *svc_path, void *priv)
1421 {
1422 struct qcom_slim_ngd_ctrl *ctrl = (struct qcom_slim_ngd_ctrl *)priv;
1423
1424 qcom_slim_ngd_ssr_pdr_notify(ctrl, state);
1425 }
1426 static int of_qcom_slim_ngd_register(struct device *parent,
1427 struct qcom_slim_ngd_ctrl *ctrl)
1428 {
1429 const struct ngd_reg_offset_data *data;
1430 struct qcom_slim_ngd *ngd;
1431 const struct of_device_id *match;
1432 struct device_node *node;
1433 u32 id;
1434
1435 match = of_match_node(qcom_slim_ngd_dt_match, parent->of_node);
1436 data = match->data;
1437 for_each_available_child_of_node(parent->of_node, node) {
1438 if (of_property_read_u32(node, "reg", &id))
1439 continue;
1440
1441 ngd = kzalloc(sizeof(*ngd), GFP_KERNEL);
1442 if (!ngd) {
1443 of_node_put(node);
1444 return -ENOMEM;
1445 }
1446
1447 ngd->pdev = platform_device_alloc(QCOM_SLIM_NGD_DRV_NAME, id);
1448 if (!ngd->pdev) {
1449 kfree(ngd);
1450 of_node_put(node);
1451 return -ENOMEM;
1452 }
1453 ngd->id = id;
1454 ngd->pdev->dev.parent = parent;
1455 ngd->pdev->driver_override = QCOM_SLIM_NGD_DRV_NAME;
1456 ngd->pdev->dev.of_node = node;
1457 ctrl->ngd = ngd;
1458
1459 platform_device_add(ngd->pdev);
1460 ngd->base = ctrl->base + ngd->id * data->offset +
1461 (ngd->id - 1) * data->size;
1462
1463 return 0;
1464 }
1465
1466 return -ENODEV;
1467 }
1468
1469 static int qcom_slim_ngd_probe(struct platform_device *pdev)
1470 {
1471 struct device *dev = &pdev->dev;
1472 struct qcom_slim_ngd_ctrl *ctrl = dev_get_drvdata(dev->parent);
1473 int ret;
1474
1475 ctrl->ctrl.dev = dev;
1476
1477 platform_set_drvdata(pdev, ctrl);
1478 pm_runtime_use_autosuspend(dev);
1479 pm_runtime_set_autosuspend_delay(dev, QCOM_SLIM_NGD_AUTOSUSPEND);
1480 pm_runtime_set_suspended(dev);
1481 pm_runtime_enable(dev);
1482 pm_runtime_get_noresume(dev);
1483 ret = qcom_slim_ngd_qmi_svc_event_init(ctrl);
1484 if (ret) {
1485 dev_err(&pdev->dev, "QMI service registration failed:%d", ret);
1486 return ret;
1487 }
1488
1489 INIT_WORK(&ctrl->m_work, qcom_slim_ngd_master_worker);
1490 INIT_WORK(&ctrl->ngd_up_work, qcom_slim_ngd_up_worker);
1491 ctrl->mwq = create_singlethread_workqueue("ngd_master");
1492 if (!ctrl->mwq) {
1493 dev_err(&pdev->dev, "Failed to start master worker\n");
1494 ret = -ENOMEM;
1495 goto wq_err;
1496 }
1497
1498 return 0;
1499 wq_err:
1500 qcom_slim_ngd_qmi_svc_event_deinit(&ctrl->qmi);
1501 if (ctrl->mwq)
1502 destroy_workqueue(ctrl->mwq);
1503
1504 return ret;
1505 }
1506
1507 static int qcom_slim_ngd_ctrl_probe(struct platform_device *pdev)
1508 {
1509 struct device *dev = &pdev->dev;
1510 struct qcom_slim_ngd_ctrl *ctrl;
1511 struct resource *res;
1512 int ret;
1513 struct pdr_service *pds;
1514
1515 ctrl = devm_kzalloc(dev, sizeof(*ctrl), GFP_KERNEL);
1516 if (!ctrl)
1517 return -ENOMEM;
1518
1519 dev_set_drvdata(dev, ctrl);
1520
1521 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1522 ctrl->base = devm_ioremap_resource(dev, res);
1523 if (IS_ERR(ctrl->base))
1524 return PTR_ERR(ctrl->base);
1525
1526 res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
1527 if (!res) {
1528 dev_err(&pdev->dev, "no slimbus IRQ resource\n");
1529 return -ENODEV;
1530 }
1531
1532 ret = devm_request_irq(dev, res->start, qcom_slim_ngd_interrupt,
1533 IRQF_TRIGGER_HIGH, "slim-ngd", ctrl);
1534 if (ret) {
1535 dev_err(&pdev->dev, "request IRQ failed\n");
1536 return ret;
1537 }
1538
1539 ctrl->nb.notifier_call = qcom_slim_ngd_ssr_notify;
1540 ctrl->notifier = qcom_register_ssr_notifier("lpass", &ctrl->nb);
1541 if (IS_ERR(ctrl->notifier))
1542 return PTR_ERR(ctrl->notifier);
1543
1544 ctrl->dev = dev;
1545 ctrl->framer.rootfreq = SLIM_ROOT_FREQ >> 3;
1546 ctrl->framer.superfreq =
1547 ctrl->framer.rootfreq / SLIM_CL_PER_SUPERFRAME_DIV8;
1548
1549 ctrl->ctrl.a_framer = &ctrl->framer;
1550 ctrl->ctrl.clkgear = SLIM_MAX_CLK_GEAR;
1551 ctrl->ctrl.get_laddr = qcom_slim_ngd_get_laddr;
1552 ctrl->ctrl.enable_stream = qcom_slim_ngd_enable_stream;
1553 ctrl->ctrl.xfer_msg = qcom_slim_ngd_xfer_msg;
1554 ctrl->ctrl.wakeup = NULL;
1555 ctrl->state = QCOM_SLIM_NGD_CTRL_DOWN;
1556
1557 mutex_init(&ctrl->tx_lock);
1558 mutex_init(&ctrl->ssr_lock);
1559 spin_lock_init(&ctrl->tx_buf_lock);
1560 init_completion(&ctrl->reconf);
1561 init_completion(&ctrl->qmi.qmi_comp);
1562 init_completion(&ctrl->qmi_up);
1563
1564 ctrl->pdr = pdr_handle_alloc(slim_pd_status, ctrl);
1565 if (IS_ERR(ctrl->pdr)) {
1566 dev_err(dev, "Failed to init PDR handle\n");
1567 return PTR_ERR(ctrl->pdr);
1568 }
1569
1570 pds = pdr_add_lookup(ctrl->pdr, "avs/audio", "msm/adsp/audio_pd");
1571 if (IS_ERR(pds) && PTR_ERR(pds) != -EALREADY) {
1572 dev_err(dev, "pdr add lookup failed: %d\n", ret);
1573 return PTR_ERR(pds);
1574 }
1575
1576 platform_driver_register(&qcom_slim_ngd_driver);
1577 return of_qcom_slim_ngd_register(dev, ctrl);
1578 }
1579
1580 static int qcom_slim_ngd_ctrl_remove(struct platform_device *pdev)
1581 {
1582 platform_driver_unregister(&qcom_slim_ngd_driver);
1583
1584 return 0;
1585 }
1586
1587 static int qcom_slim_ngd_remove(struct platform_device *pdev)
1588 {
1589 struct qcom_slim_ngd_ctrl *ctrl = platform_get_drvdata(pdev);
1590
1591 pm_runtime_disable(&pdev->dev);
1592 pdr_handle_release(ctrl->pdr);
1593 qcom_unregister_ssr_notifier(ctrl->notifier, &ctrl->nb);
1594 qcom_slim_ngd_enable(ctrl, false);
1595 qcom_slim_ngd_exit_dma(ctrl);
1596 qcom_slim_ngd_qmi_svc_event_deinit(&ctrl->qmi);
1597 if (ctrl->mwq)
1598 destroy_workqueue(ctrl->mwq);
1599
1600 kfree(ctrl->ngd);
1601 ctrl->ngd = NULL;
1602 return 0;
1603 }
1604
1605 static int __maybe_unused qcom_slim_ngd_runtime_idle(struct device *dev)
1606 {
1607 struct qcom_slim_ngd_ctrl *ctrl = dev_get_drvdata(dev);
1608
1609 if (ctrl->state == QCOM_SLIM_NGD_CTRL_AWAKE)
1610 ctrl->state = QCOM_SLIM_NGD_CTRL_IDLE;
1611 pm_request_autosuspend(dev);
1612 return -EAGAIN;
1613 }
1614
1615 static int __maybe_unused qcom_slim_ngd_runtime_suspend(struct device *dev)
1616 {
1617 struct qcom_slim_ngd_ctrl *ctrl = dev_get_drvdata(dev);
1618 int ret = 0;
1619
1620 if (!ctrl->qmi.handle)
1621 return 0;
1622
1623 ret = qcom_slim_qmi_power_request(ctrl, false);
1624 if (ret && ret != -EBUSY)
1625 dev_info(ctrl->dev, "slim resource not idle:%d\n", ret);
1626 if (!ret || ret == -ETIMEDOUT)
1627 ctrl->state = QCOM_SLIM_NGD_CTRL_ASLEEP;
1628
1629 return ret;
1630 }
1631
1632 static const struct dev_pm_ops qcom_slim_ngd_dev_pm_ops = {
1633 SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
1634 pm_runtime_force_resume)
1635 SET_RUNTIME_PM_OPS(
1636 qcom_slim_ngd_runtime_suspend,
1637 qcom_slim_ngd_runtime_resume,
1638 qcom_slim_ngd_runtime_idle
1639 )
1640 };
1641
1642 static struct platform_driver qcom_slim_ngd_ctrl_driver = {
1643 .probe = qcom_slim_ngd_ctrl_probe,
1644 .remove = qcom_slim_ngd_ctrl_remove,
1645 .driver = {
1646 .name = "qcom,slim-ngd-ctrl",
1647 .of_match_table = qcom_slim_ngd_dt_match,
1648 },
1649 };
1650
1651 static struct platform_driver qcom_slim_ngd_driver = {
1652 .probe = qcom_slim_ngd_probe,
1653 .remove = qcom_slim_ngd_remove,
1654 .driver = {
1655 .name = QCOM_SLIM_NGD_DRV_NAME,
1656 .pm = &qcom_slim_ngd_dev_pm_ops,
1657 },
1658 };
1659
1660 module_platform_driver(qcom_slim_ngd_ctrl_driver);
1661 MODULE_LICENSE("GPL v2");
1662 MODULE_DESCRIPTION("Qualcomm SLIMBus NGD controller");
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