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
qcom_slim_qmi_send_select_inst_req(struct qcom_slim_ngd_ctrl * ctrl,struct slimbus_select_inst_req_msg_v01 * req)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
qcom_slim_qmi_power_resp_cb(struct qmi_handle * handle,struct sockaddr_qrtr * sq,struct qmi_txn * txn,const void * data)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
qcom_slim_qmi_send_power_request(struct qcom_slim_ngd_ctrl * ctrl,struct slimbus_power_req_msg_v01 * req)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
qcom_slim_qmi_init(struct qcom_slim_ngd_ctrl * ctrl,bool apps_is_master)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
qcom_slim_qmi_exit(struct qcom_slim_ngd_ctrl * ctrl)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
qcom_slim_qmi_power_request(struct qcom_slim_ngd_ctrl * ctrl,bool active)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
qcom_slim_ngd_tx_msg_get(struct qcom_slim_ngd_ctrl * ctrl,int len,struct completion * comp)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
qcom_slim_ngd_tx_msg_dma_cb(void * args)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
qcom_slim_ngd_tx_msg_post(struct qcom_slim_ngd_ctrl * ctrl,void * buf,int len)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
qcom_slim_ngd_rx(struct qcom_slim_ngd_ctrl * ctrl,u8 * buf)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->ctrl.dev);
622 }
623 }
624
qcom_slim_ngd_rx_msgq_cb(void * args)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
qcom_slim_ngd_post_rx_msgq(struct qcom_slim_ngd_ctrl * ctrl)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
qcom_slim_ngd_init_rx_msgq(struct qcom_slim_ngd_ctrl * ctrl)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
qcom_slim_ngd_init_tx_msgq(struct qcom_slim_ngd_ctrl * ctrl)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
qcom_slim_ngd_init_dma(struct qcom_slim_ngd_ctrl * ctrl)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
qcom_slim_ngd_interrupt(int irq,void * d)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;
767
768 if (pm_runtime_suspended(ctrl->ctrl.dev)) {
769 dev_warn_once(ctrl->dev, "Interrupt received while suspended\n");
770 return IRQ_NONE;
771 }
772
773 stat = readl(base + NGD_INT_STAT);
774
775 if ((stat & NGD_INT_MSG_BUF_CONTE) ||
776 (stat & NGD_INT_MSG_TX_INVAL) || (stat & NGD_INT_DEV_ERR) ||
777 (stat & NGD_INT_TX_NACKED_2)) {
778 dev_err(ctrl->dev, "Error Interrupt received 0x%x\n", stat);
779 }
780
781 writel(stat, base + NGD_INT_CLR);
782
783 return IRQ_HANDLED;
784 }
785
qcom_slim_ngd_xfer_msg(struct slim_controller * sctrl,struct slim_msg_txn * txn)786 static int qcom_slim_ngd_xfer_msg(struct slim_controller *sctrl,
787 struct slim_msg_txn *txn)
788 {
789 struct qcom_slim_ngd_ctrl *ctrl = dev_get_drvdata(sctrl->dev);
790 DECLARE_COMPLETION_ONSTACK(tx_sent);
791 DECLARE_COMPLETION_ONSTACK(done);
792 int ret, timeout, i;
793 u8 wbuf[SLIM_MSGQ_BUF_LEN];
794 u8 rbuf[SLIM_MSGQ_BUF_LEN];
795 u32 *pbuf;
796 u8 *puc;
797 u8 la = txn->la;
798 bool usr_msg = false;
799
800 if (txn->mt == SLIM_MSG_MT_CORE &&
801 (txn->mc >= SLIM_MSG_MC_BEGIN_RECONFIGURATION &&
802 txn->mc <= SLIM_MSG_MC_RECONFIGURE_NOW))
803 return 0;
804
805 if (txn->dt == SLIM_MSG_DEST_ENUMADDR)
806 return -EPROTONOSUPPORT;
807
808 if (txn->msg->num_bytes > SLIM_MSGQ_BUF_LEN ||
809 txn->rl > SLIM_MSGQ_BUF_LEN) {
810 dev_err(ctrl->dev, "msg exceeds HW limit\n");
811 return -EINVAL;
812 }
813
814 pbuf = qcom_slim_ngd_tx_msg_get(ctrl, txn->rl, &tx_sent);
815 if (!pbuf) {
816 dev_err(ctrl->dev, "Message buffer unavailable\n");
817 return -ENOMEM;
818 }
819
820 if (txn->mt == SLIM_MSG_MT_CORE &&
821 (txn->mc == SLIM_MSG_MC_CONNECT_SOURCE ||
822 txn->mc == SLIM_MSG_MC_CONNECT_SINK ||
823 txn->mc == SLIM_MSG_MC_DISCONNECT_PORT)) {
824 txn->mt = SLIM_MSG_MT_DEST_REFERRED_USER;
825 switch (txn->mc) {
826 case SLIM_MSG_MC_CONNECT_SOURCE:
827 txn->mc = SLIM_USR_MC_CONNECT_SRC;
828 break;
829 case SLIM_MSG_MC_CONNECT_SINK:
830 txn->mc = SLIM_USR_MC_CONNECT_SINK;
831 break;
832 case SLIM_MSG_MC_DISCONNECT_PORT:
833 txn->mc = SLIM_USR_MC_DISCONNECT_PORT;
834 break;
835 default:
836 return -EINVAL;
837 }
838
839 usr_msg = true;
840 i = 0;
841 wbuf[i++] = txn->la;
842 la = SLIM_LA_MGR;
843 wbuf[i++] = txn->msg->wbuf[0];
844 if (txn->mc != SLIM_USR_MC_DISCONNECT_PORT)
845 wbuf[i++] = txn->msg->wbuf[1];
846
847 txn->comp = &done;
848 ret = slim_alloc_txn_tid(sctrl, txn);
849 if (ret) {
850 dev_err(ctrl->dev, "Unable to allocate TID\n");
851 return ret;
852 }
853
854 wbuf[i++] = txn->tid;
855
856 txn->msg->num_bytes = i;
857 txn->msg->wbuf = wbuf;
858 txn->msg->rbuf = rbuf;
859 txn->rl = txn->msg->num_bytes + 4;
860 }
861
862 /* HW expects length field to be excluded */
863 txn->rl--;
864 puc = (u8 *)pbuf;
865 *pbuf = 0;
866 if (txn->dt == SLIM_MSG_DEST_LOGICALADDR) {
867 *pbuf = SLIM_MSG_ASM_FIRST_WORD(txn->rl, txn->mt, txn->mc, 0,
868 la);
869 puc += 3;
870 } else {
871 *pbuf = SLIM_MSG_ASM_FIRST_WORD(txn->rl, txn->mt, txn->mc, 1,
872 la);
873 puc += 2;
874 }
875
876 if (slim_tid_txn(txn->mt, txn->mc))
877 *(puc++) = txn->tid;
878
879 if (slim_ec_txn(txn->mt, txn->mc)) {
880 *(puc++) = (txn->ec & 0xFF);
881 *(puc++) = (txn->ec >> 8) & 0xFF;
882 }
883
884 if (txn->msg && txn->msg->wbuf)
885 memcpy(puc, txn->msg->wbuf, txn->msg->num_bytes);
886
887 mutex_lock(&ctrl->tx_lock);
888 ret = qcom_slim_ngd_tx_msg_post(ctrl, pbuf, txn->rl);
889 if (ret) {
890 mutex_unlock(&ctrl->tx_lock);
891 return ret;
892 }
893
894 timeout = wait_for_completion_timeout(&tx_sent, HZ);
895 if (!timeout) {
896 dev_err(sctrl->dev, "TX timed out:MC:0x%x,mt:0x%x", txn->mc,
897 txn->mt);
898 mutex_unlock(&ctrl->tx_lock);
899 return -ETIMEDOUT;
900 }
901
902 if (usr_msg) {
903 timeout = wait_for_completion_timeout(&done, HZ);
904 if (!timeout) {
905 dev_err(sctrl->dev, "TX timed out:MC:0x%x,mt:0x%x",
906 txn->mc, txn->mt);
907 mutex_unlock(&ctrl->tx_lock);
908 return -ETIMEDOUT;
909 }
910 }
911
912 mutex_unlock(&ctrl->tx_lock);
913 return 0;
914 }
915
qcom_slim_ngd_xfer_msg_sync(struct slim_controller * ctrl,struct slim_msg_txn * txn)916 static int qcom_slim_ngd_xfer_msg_sync(struct slim_controller *ctrl,
917 struct slim_msg_txn *txn)
918 {
919 DECLARE_COMPLETION_ONSTACK(done);
920 int ret, timeout;
921
922 ret = pm_runtime_get_sync(ctrl->dev);
923 if (ret < 0)
924 goto pm_put;
925
926 txn->comp = &done;
927
928 ret = qcom_slim_ngd_xfer_msg(ctrl, txn);
929 if (ret)
930 goto pm_put;
931
932 timeout = wait_for_completion_timeout(&done, HZ);
933 if (!timeout) {
934 dev_err(ctrl->dev, "TX timed out:MC:0x%x,mt:0x%x", txn->mc,
935 txn->mt);
936 ret = -ETIMEDOUT;
937 goto pm_put;
938 }
939 return 0;
940
941 pm_put:
942 pm_runtime_put(ctrl->dev);
943
944 return ret;
945 }
946
qcom_slim_calc_coef(struct slim_stream_runtime * rt,int * exp)947 static int qcom_slim_calc_coef(struct slim_stream_runtime *rt, int *exp)
948 {
949 struct slim_controller *ctrl = rt->dev->ctrl;
950 int coef;
951
952 if (rt->ratem * ctrl->a_framer->superfreq < rt->rate)
953 rt->ratem++;
954
955 coef = rt->ratem;
956 *exp = 0;
957
958 /*
959 * CRM = Cx(2^E) is the formula we are using.
960 * Here C is the coffecient and E is the exponent.
961 * CRM is the Channel Rate Multiplier.
962 * Coefficeint should be either 1 or 3 and exponenet
963 * should be an integer between 0 to 9, inclusive.
964 */
965 while (1) {
966 while ((coef & 0x1) != 0x1) {
967 coef >>= 1;
968 *exp = *exp + 1;
969 }
970
971 if (coef <= 3)
972 break;
973
974 coef++;
975 }
976
977 /*
978 * we rely on the coef value (1 or 3) to set a bit
979 * in the slimbus message packet. This bit is
980 * BIT(5) which is the segment rate coefficient.
981 */
982 if (coef == 1) {
983 if (*exp > 9)
984 return -EIO;
985 coef = 0;
986 } else {
987 if (*exp > 8)
988 return -EIO;
989 coef = 1;
990 }
991
992 return coef;
993 }
994
qcom_slim_ngd_enable_stream(struct slim_stream_runtime * rt)995 static int qcom_slim_ngd_enable_stream(struct slim_stream_runtime *rt)
996 {
997 struct slim_device *sdev = rt->dev;
998 struct slim_controller *ctrl = sdev->ctrl;
999 struct slim_val_inf msg = {0};
1000 u8 wbuf[SLIM_MSGQ_BUF_LEN];
1001 u8 rbuf[SLIM_MSGQ_BUF_LEN];
1002 struct slim_msg_txn txn = {0,};
1003 int i, ret;
1004
1005 txn.mt = SLIM_MSG_MT_DEST_REFERRED_USER;
1006 txn.dt = SLIM_MSG_DEST_LOGICALADDR;
1007 txn.la = SLIM_LA_MGR;
1008 txn.ec = 0;
1009 txn.msg = &msg;
1010 txn.msg->num_bytes = 0;
1011 txn.msg->wbuf = wbuf;
1012 txn.msg->rbuf = rbuf;
1013
1014 for (i = 0; i < rt->num_ports; i++) {
1015 struct slim_port *port = &rt->ports[i];
1016
1017 if (txn.msg->num_bytes == 0) {
1018 int exp = 0, coef = 0;
1019
1020 wbuf[txn.msg->num_bytes++] = sdev->laddr;
1021 wbuf[txn.msg->num_bytes] = rt->bps >> 2 |
1022 (port->ch.aux_fmt << 6);
1023
1024 /* calculate coef dynamically */
1025 coef = qcom_slim_calc_coef(rt, &exp);
1026 if (coef < 0) {
1027 dev_err(&sdev->dev,
1028 "%s: error calculating coef %d\n", __func__,
1029 coef);
1030 return -EIO;
1031 }
1032
1033 if (coef)
1034 wbuf[txn.msg->num_bytes] |= BIT(5);
1035
1036 txn.msg->num_bytes++;
1037 wbuf[txn.msg->num_bytes++] = exp << 4 | rt->prot;
1038
1039 if (rt->prot == SLIM_PROTO_ISO)
1040 wbuf[txn.msg->num_bytes++] =
1041 port->ch.prrate |
1042 SLIM_CHANNEL_CONTENT_FL;
1043 else
1044 wbuf[txn.msg->num_bytes++] = port->ch.prrate;
1045
1046 ret = slim_alloc_txn_tid(ctrl, &txn);
1047 if (ret) {
1048 dev_err(&sdev->dev, "Fail to allocate TID\n");
1049 return -ENXIO;
1050 }
1051 wbuf[txn.msg->num_bytes++] = txn.tid;
1052 }
1053 wbuf[txn.msg->num_bytes++] = port->ch.id;
1054 }
1055
1056 txn.mc = SLIM_USR_MC_DEF_ACT_CHAN;
1057 txn.rl = txn.msg->num_bytes + 4;
1058 ret = qcom_slim_ngd_xfer_msg_sync(ctrl, &txn);
1059 if (ret) {
1060 slim_free_txn_tid(ctrl, &txn);
1061 dev_err(&sdev->dev, "TX timed out:MC:0x%x,mt:0x%x", txn.mc,
1062 txn.mt);
1063 return ret;
1064 }
1065
1066 txn.mc = SLIM_USR_MC_RECONFIG_NOW;
1067 txn.msg->num_bytes = 2;
1068 wbuf[1] = sdev->laddr;
1069 txn.rl = txn.msg->num_bytes + 4;
1070
1071 ret = slim_alloc_txn_tid(ctrl, &txn);
1072 if (ret) {
1073 dev_err(ctrl->dev, "Fail to allocate TID\n");
1074 return ret;
1075 }
1076
1077 wbuf[0] = txn.tid;
1078 ret = qcom_slim_ngd_xfer_msg_sync(ctrl, &txn);
1079 if (ret) {
1080 slim_free_txn_tid(ctrl, &txn);
1081 dev_err(&sdev->dev, "TX timed out:MC:0x%x,mt:0x%x", txn.mc,
1082 txn.mt);
1083 }
1084
1085 return ret;
1086 }
1087
qcom_slim_ngd_get_laddr(struct slim_controller * ctrl,struct slim_eaddr * ea,u8 * laddr)1088 static int qcom_slim_ngd_get_laddr(struct slim_controller *ctrl,
1089 struct slim_eaddr *ea, u8 *laddr)
1090 {
1091 struct slim_val_inf msg = {0};
1092 u8 failed_ea[6] = {0, 0, 0, 0, 0, 0};
1093 struct slim_msg_txn txn;
1094 u8 wbuf[10] = {0};
1095 u8 rbuf[10] = {0};
1096 int ret;
1097
1098 txn.mt = SLIM_MSG_MT_DEST_REFERRED_USER;
1099 txn.dt = SLIM_MSG_DEST_LOGICALADDR;
1100 txn.la = SLIM_LA_MGR;
1101 txn.ec = 0;
1102
1103 txn.mc = SLIM_USR_MC_ADDR_QUERY;
1104 txn.rl = 11;
1105 txn.msg = &msg;
1106 txn.msg->num_bytes = 7;
1107 txn.msg->wbuf = wbuf;
1108 txn.msg->rbuf = rbuf;
1109
1110 ret = slim_alloc_txn_tid(ctrl, &txn);
1111 if (ret < 0)
1112 return ret;
1113
1114 wbuf[0] = (u8)txn.tid;
1115 memcpy(&wbuf[1], ea, sizeof(*ea));
1116
1117 ret = qcom_slim_ngd_xfer_msg_sync(ctrl, &txn);
1118 if (ret) {
1119 slim_free_txn_tid(ctrl, &txn);
1120 return ret;
1121 }
1122
1123 if (!memcmp(rbuf, failed_ea, 6))
1124 return -ENXIO;
1125
1126 *laddr = rbuf[6];
1127
1128 return ret;
1129 }
1130
qcom_slim_ngd_exit_dma(struct qcom_slim_ngd_ctrl * ctrl)1131 static int qcom_slim_ngd_exit_dma(struct qcom_slim_ngd_ctrl *ctrl)
1132 {
1133 if (ctrl->dma_rx_channel) {
1134 dmaengine_terminate_sync(ctrl->dma_rx_channel);
1135 dma_release_channel(ctrl->dma_rx_channel);
1136 }
1137
1138 if (ctrl->dma_tx_channel) {
1139 dmaengine_terminate_sync(ctrl->dma_tx_channel);
1140 dma_release_channel(ctrl->dma_tx_channel);
1141 }
1142
1143 ctrl->dma_tx_channel = ctrl->dma_rx_channel = NULL;
1144
1145 return 0;
1146 }
1147
qcom_slim_ngd_setup(struct qcom_slim_ngd_ctrl * ctrl)1148 static void qcom_slim_ngd_setup(struct qcom_slim_ngd_ctrl *ctrl)
1149 {
1150 u32 cfg = readl_relaxed(ctrl->ngd->base);
1151
1152 if (ctrl->state == QCOM_SLIM_NGD_CTRL_DOWN ||
1153 ctrl->state == QCOM_SLIM_NGD_CTRL_ASLEEP)
1154 qcom_slim_ngd_init_dma(ctrl);
1155
1156 /* By default enable message queues */
1157 cfg |= NGD_CFG_RX_MSGQ_EN;
1158 cfg |= NGD_CFG_TX_MSGQ_EN;
1159
1160 /* Enable NGD if it's not already enabled*/
1161 if (!(cfg & NGD_CFG_ENABLE))
1162 cfg |= NGD_CFG_ENABLE;
1163
1164 writel_relaxed(cfg, ctrl->ngd->base);
1165 }
1166
qcom_slim_ngd_power_up(struct qcom_slim_ngd_ctrl * ctrl)1167 static int qcom_slim_ngd_power_up(struct qcom_slim_ngd_ctrl *ctrl)
1168 {
1169 enum qcom_slim_ngd_state cur_state = ctrl->state;
1170 struct qcom_slim_ngd *ngd = ctrl->ngd;
1171 u32 laddr, rx_msgq;
1172 int timeout, ret = 0;
1173
1174 if (ctrl->state == QCOM_SLIM_NGD_CTRL_DOWN) {
1175 timeout = wait_for_completion_timeout(&ctrl->qmi.qmi_comp, HZ);
1176 if (!timeout)
1177 return -EREMOTEIO;
1178 }
1179
1180 if (ctrl->state == QCOM_SLIM_NGD_CTRL_ASLEEP ||
1181 ctrl->state == QCOM_SLIM_NGD_CTRL_DOWN) {
1182 ret = qcom_slim_qmi_power_request(ctrl, true);
1183 if (ret) {
1184 dev_err(ctrl->dev, "SLIM QMI power request failed:%d\n",
1185 ret);
1186 return ret;
1187 }
1188 }
1189
1190 ctrl->ver = readl_relaxed(ctrl->base);
1191 /* Version info in 16 MSbits */
1192 ctrl->ver >>= 16;
1193
1194 laddr = readl_relaxed(ngd->base + NGD_STATUS);
1195 if (laddr & NGD_LADDR) {
1196 /*
1197 * external MDM restart case where ADSP itself was active framer
1198 * For example, modem restarted when playback was active
1199 */
1200 if (cur_state == QCOM_SLIM_NGD_CTRL_AWAKE) {
1201 dev_info(ctrl->dev, "Subsys restart: ADSP active framer\n");
1202 return 0;
1203 }
1204 qcom_slim_ngd_setup(ctrl);
1205 return 0;
1206 }
1207
1208 /*
1209 * Reinitialize only when registers are not retained or when enumeration
1210 * is lost for ngd.
1211 */
1212 reinit_completion(&ctrl->reconf);
1213
1214 writel_relaxed(DEF_NGD_INT_MASK, ngd->base + NGD_INT_EN);
1215 rx_msgq = readl_relaxed(ngd->base + NGD_RX_MSGQ_CFG);
1216
1217 writel_relaxed(rx_msgq|SLIM_RX_MSGQ_TIMEOUT_VAL,
1218 ngd->base + NGD_RX_MSGQ_CFG);
1219 qcom_slim_ngd_setup(ctrl);
1220
1221 timeout = wait_for_completion_timeout(&ctrl->reconf, HZ);
1222 if (!timeout) {
1223 dev_err(ctrl->dev, "capability exchange timed-out\n");
1224 return -ETIMEDOUT;
1225 }
1226
1227 return 0;
1228 }
1229
qcom_slim_ngd_notify_slaves(struct qcom_slim_ngd_ctrl * ctrl)1230 static void qcom_slim_ngd_notify_slaves(struct qcom_slim_ngd_ctrl *ctrl)
1231 {
1232 struct slim_device *sbdev;
1233 struct device_node *node;
1234
1235 for_each_child_of_node(ctrl->ngd->pdev->dev.of_node, node) {
1236 sbdev = of_slim_get_device(&ctrl->ctrl, node);
1237 if (!sbdev)
1238 continue;
1239
1240 if (slim_get_logical_addr(sbdev))
1241 dev_err(ctrl->dev, "Failed to get logical address\n");
1242 }
1243 }
1244
qcom_slim_ngd_master_worker(struct work_struct * work)1245 static void qcom_slim_ngd_master_worker(struct work_struct *work)
1246 {
1247 struct qcom_slim_ngd_ctrl *ctrl;
1248 struct slim_msg_txn txn;
1249 struct slim_val_inf msg = {0};
1250 int retries = 0;
1251 u8 wbuf[8];
1252 int ret = 0;
1253
1254 ctrl = container_of(work, struct qcom_slim_ngd_ctrl, m_work);
1255 txn.dt = SLIM_MSG_DEST_LOGICALADDR;
1256 txn.ec = 0;
1257 txn.mc = SLIM_USR_MC_REPORT_SATELLITE;
1258 txn.mt = SLIM_MSG_MT_SRC_REFERRED_USER;
1259 txn.la = SLIM_LA_MGR;
1260 wbuf[0] = SAT_MAGIC_LSB;
1261 wbuf[1] = SAT_MAGIC_MSB;
1262 wbuf[2] = SAT_MSG_VER;
1263 wbuf[3] = SAT_MSG_PROT;
1264 txn.msg = &msg;
1265 txn.msg->wbuf = wbuf;
1266 txn.msg->num_bytes = 4;
1267 txn.rl = 8;
1268
1269 dev_info(ctrl->dev, "SLIM SAT: Rcvd master capability\n");
1270
1271 capability_retry:
1272 ret = qcom_slim_ngd_xfer_msg(&ctrl->ctrl, &txn);
1273 if (!ret) {
1274 if (ctrl->state >= QCOM_SLIM_NGD_CTRL_ASLEEP)
1275 complete(&ctrl->reconf);
1276 else
1277 dev_err(ctrl->dev, "unexpected state:%d\n",
1278 ctrl->state);
1279
1280 if (ctrl->state == QCOM_SLIM_NGD_CTRL_DOWN)
1281 qcom_slim_ngd_notify_slaves(ctrl);
1282
1283 } else if (ret == -EIO) {
1284 dev_err(ctrl->dev, "capability message NACKed, retrying\n");
1285 if (retries < INIT_MX_RETRIES) {
1286 msleep(DEF_RETRY_MS);
1287 retries++;
1288 goto capability_retry;
1289 }
1290 } else {
1291 dev_err(ctrl->dev, "SLIM: capability TX failed:%d\n", ret);
1292 }
1293 }
1294
qcom_slim_ngd_update_device_status(struct device * dev,void * null)1295 static int qcom_slim_ngd_update_device_status(struct device *dev, void *null)
1296 {
1297 slim_report_absent(to_slim_device(dev));
1298
1299 return 0;
1300 }
1301
qcom_slim_ngd_runtime_resume(struct device * dev)1302 static int qcom_slim_ngd_runtime_resume(struct device *dev)
1303 {
1304 struct qcom_slim_ngd_ctrl *ctrl = dev_get_drvdata(dev);
1305 int ret = 0;
1306
1307 if (!ctrl->qmi.handle)
1308 return 0;
1309
1310 if (ctrl->state >= QCOM_SLIM_NGD_CTRL_ASLEEP)
1311 ret = qcom_slim_ngd_power_up(ctrl);
1312 if (ret) {
1313 /* Did SSR cause this power up failure */
1314 if (ctrl->state != QCOM_SLIM_NGD_CTRL_DOWN)
1315 ctrl->state = QCOM_SLIM_NGD_CTRL_ASLEEP;
1316 else
1317 dev_err(ctrl->dev, "HW wakeup attempt during SSR\n");
1318 } else {
1319 ctrl->state = QCOM_SLIM_NGD_CTRL_AWAKE;
1320 }
1321
1322 return 0;
1323 }
1324
qcom_slim_ngd_enable(struct qcom_slim_ngd_ctrl * ctrl,bool enable)1325 static int qcom_slim_ngd_enable(struct qcom_slim_ngd_ctrl *ctrl, bool enable)
1326 {
1327 if (enable) {
1328 int ret = qcom_slim_qmi_init(ctrl, false);
1329
1330 if (ret) {
1331 dev_err(ctrl->dev, "qmi init fail, ret:%d, state:%d\n",
1332 ret, ctrl->state);
1333 return ret;
1334 }
1335 /* controller state should be in sync with framework state */
1336 complete(&ctrl->qmi.qmi_comp);
1337 if (!pm_runtime_enabled(ctrl->ctrl.dev) ||
1338 !pm_runtime_suspended(ctrl->ctrl.dev))
1339 qcom_slim_ngd_runtime_resume(ctrl->ctrl.dev);
1340 else
1341 pm_runtime_resume(ctrl->ctrl.dev);
1342
1343 pm_runtime_mark_last_busy(ctrl->ctrl.dev);
1344 pm_runtime_put(ctrl->ctrl.dev);
1345
1346 ret = slim_register_controller(&ctrl->ctrl);
1347 if (ret) {
1348 dev_err(ctrl->dev, "error adding slim controller\n");
1349 return ret;
1350 }
1351
1352 dev_info(ctrl->dev, "SLIM controller Registered\n");
1353 } else {
1354 qcom_slim_qmi_exit(ctrl);
1355 slim_unregister_controller(&ctrl->ctrl);
1356 }
1357
1358 return 0;
1359 }
1360
qcom_slim_ngd_qmi_new_server(struct qmi_handle * hdl,struct qmi_service * service)1361 static int qcom_slim_ngd_qmi_new_server(struct qmi_handle *hdl,
1362 struct qmi_service *service)
1363 {
1364 struct qcom_slim_ngd_qmi *qmi =
1365 container_of(hdl, struct qcom_slim_ngd_qmi, svc_event_hdl);
1366 struct qcom_slim_ngd_ctrl *ctrl =
1367 container_of(qmi, struct qcom_slim_ngd_ctrl, qmi);
1368
1369 qmi->svc_info.sq_family = AF_QIPCRTR;
1370 qmi->svc_info.sq_node = service->node;
1371 qmi->svc_info.sq_port = service->port;
1372
1373 complete(&ctrl->qmi_up);
1374
1375 return 0;
1376 }
1377
qcom_slim_ngd_qmi_del_server(struct qmi_handle * hdl,struct qmi_service * service)1378 static void qcom_slim_ngd_qmi_del_server(struct qmi_handle *hdl,
1379 struct qmi_service *service)
1380 {
1381 struct qcom_slim_ngd_qmi *qmi =
1382 container_of(hdl, struct qcom_slim_ngd_qmi, svc_event_hdl);
1383 struct qcom_slim_ngd_ctrl *ctrl =
1384 container_of(qmi, struct qcom_slim_ngd_ctrl, qmi);
1385
1386 reinit_completion(&ctrl->qmi_up);
1387 qmi->svc_info.sq_node = 0;
1388 qmi->svc_info.sq_port = 0;
1389 }
1390
1391 static const struct qmi_ops qcom_slim_ngd_qmi_svc_event_ops = {
1392 .new_server = qcom_slim_ngd_qmi_new_server,
1393 .del_server = qcom_slim_ngd_qmi_del_server,
1394 };
1395
qcom_slim_ngd_qmi_svc_event_init(struct qcom_slim_ngd_ctrl * ctrl)1396 static int qcom_slim_ngd_qmi_svc_event_init(struct qcom_slim_ngd_ctrl *ctrl)
1397 {
1398 struct qcom_slim_ngd_qmi *qmi = &ctrl->qmi;
1399 int ret;
1400
1401 ret = qmi_handle_init(&qmi->svc_event_hdl, 0,
1402 &qcom_slim_ngd_qmi_svc_event_ops, NULL);
1403 if (ret < 0) {
1404 dev_err(ctrl->dev, "qmi_handle_init failed: %d\n", ret);
1405 return ret;
1406 }
1407
1408 ret = qmi_add_lookup(&qmi->svc_event_hdl, SLIMBUS_QMI_SVC_ID,
1409 SLIMBUS_QMI_SVC_V1, SLIMBUS_QMI_INS_ID);
1410 if (ret < 0) {
1411 dev_err(ctrl->dev, "qmi_add_lookup failed: %d\n", ret);
1412 qmi_handle_release(&qmi->svc_event_hdl);
1413 }
1414 return ret;
1415 }
1416
qcom_slim_ngd_qmi_svc_event_deinit(struct qcom_slim_ngd_qmi * qmi)1417 static void qcom_slim_ngd_qmi_svc_event_deinit(struct qcom_slim_ngd_qmi *qmi)
1418 {
1419 qmi_handle_release(&qmi->svc_event_hdl);
1420 }
1421
1422 static struct platform_driver qcom_slim_ngd_driver;
1423 #define QCOM_SLIM_NGD_DRV_NAME "qcom,slim-ngd"
1424
1425 static const struct of_device_id qcom_slim_ngd_dt_match[] = {
1426 {
1427 .compatible = "qcom,slim-ngd-v1.5.0",
1428 .data = &ngd_v1_5_offset_info,
1429 },{
1430 .compatible = "qcom,slim-ngd-v2.1.0",
1431 .data = &ngd_v1_5_offset_info,
1432 },
1433 {}
1434 };
1435
1436 MODULE_DEVICE_TABLE(of, qcom_slim_ngd_dt_match);
1437
qcom_slim_ngd_down(struct qcom_slim_ngd_ctrl * ctrl)1438 static void qcom_slim_ngd_down(struct qcom_slim_ngd_ctrl *ctrl)
1439 {
1440 mutex_lock(&ctrl->ssr_lock);
1441 device_for_each_child(ctrl->ctrl.dev, NULL,
1442 qcom_slim_ngd_update_device_status);
1443 qcom_slim_ngd_enable(ctrl, false);
1444 mutex_unlock(&ctrl->ssr_lock);
1445 }
1446
qcom_slim_ngd_up_worker(struct work_struct * work)1447 static void qcom_slim_ngd_up_worker(struct work_struct *work)
1448 {
1449 struct qcom_slim_ngd_ctrl *ctrl;
1450
1451 ctrl = container_of(work, struct qcom_slim_ngd_ctrl, ngd_up_work);
1452
1453 /* Make sure qmi service is up before continuing */
1454 wait_for_completion_interruptible(&ctrl->qmi_up);
1455
1456 mutex_lock(&ctrl->ssr_lock);
1457 qcom_slim_ngd_enable(ctrl, true);
1458 mutex_unlock(&ctrl->ssr_lock);
1459 }
1460
qcom_slim_ngd_ssr_pdr_notify(struct qcom_slim_ngd_ctrl * ctrl,unsigned long action)1461 static int qcom_slim_ngd_ssr_pdr_notify(struct qcom_slim_ngd_ctrl *ctrl,
1462 unsigned long action)
1463 {
1464 switch (action) {
1465 case QCOM_SSR_BEFORE_SHUTDOWN:
1466 case SERVREG_SERVICE_STATE_DOWN:
1467 /* Make sure the last dma xfer is finished */
1468 mutex_lock(&ctrl->tx_lock);
1469 if (ctrl->state != QCOM_SLIM_NGD_CTRL_DOWN) {
1470 pm_runtime_get_noresume(ctrl->ctrl.dev);
1471 ctrl->state = QCOM_SLIM_NGD_CTRL_DOWN;
1472 qcom_slim_ngd_down(ctrl);
1473 qcom_slim_ngd_exit_dma(ctrl);
1474 }
1475 mutex_unlock(&ctrl->tx_lock);
1476 break;
1477 case QCOM_SSR_AFTER_POWERUP:
1478 case SERVREG_SERVICE_STATE_UP:
1479 schedule_work(&ctrl->ngd_up_work);
1480 break;
1481 default:
1482 break;
1483 }
1484
1485 return NOTIFY_OK;
1486 }
1487
qcom_slim_ngd_ssr_notify(struct notifier_block * nb,unsigned long action,void * data)1488 static int qcom_slim_ngd_ssr_notify(struct notifier_block *nb,
1489 unsigned long action,
1490 void *data)
1491 {
1492 struct qcom_slim_ngd_ctrl *ctrl = container_of(nb,
1493 struct qcom_slim_ngd_ctrl, nb);
1494
1495 return qcom_slim_ngd_ssr_pdr_notify(ctrl, action);
1496 }
1497
slim_pd_status(int state,char * svc_path,void * priv)1498 static void slim_pd_status(int state, char *svc_path, void *priv)
1499 {
1500 struct qcom_slim_ngd_ctrl *ctrl = (struct qcom_slim_ngd_ctrl *)priv;
1501
1502 qcom_slim_ngd_ssr_pdr_notify(ctrl, state);
1503 }
of_qcom_slim_ngd_register(struct device * parent,struct qcom_slim_ngd_ctrl * ctrl)1504 static int of_qcom_slim_ngd_register(struct device *parent,
1505 struct qcom_slim_ngd_ctrl *ctrl)
1506 {
1507 const struct ngd_reg_offset_data *data;
1508 struct qcom_slim_ngd *ngd;
1509 const struct of_device_id *match;
1510 struct device_node *node;
1511 u32 id;
1512 int ret;
1513
1514 match = of_match_node(qcom_slim_ngd_dt_match, parent->of_node);
1515 data = match->data;
1516 for_each_available_child_of_node(parent->of_node, node) {
1517 if (of_property_read_u32(node, "reg", &id))
1518 continue;
1519
1520 ngd = kzalloc(sizeof(*ngd), GFP_KERNEL);
1521 if (!ngd) {
1522 of_node_put(node);
1523 return -ENOMEM;
1524 }
1525
1526 ngd->pdev = platform_device_alloc(QCOM_SLIM_NGD_DRV_NAME, id);
1527 if (!ngd->pdev) {
1528 kfree(ngd);
1529 of_node_put(node);
1530 return -ENOMEM;
1531 }
1532 ngd->id = id;
1533 ngd->pdev->dev.parent = parent;
1534
1535 ret = driver_set_override(&ngd->pdev->dev,
1536 &ngd->pdev->driver_override,
1537 QCOM_SLIM_NGD_DRV_NAME,
1538 strlen(QCOM_SLIM_NGD_DRV_NAME));
1539 if (ret) {
1540 platform_device_put(ngd->pdev);
1541 kfree(ngd);
1542 of_node_put(node);
1543 return ret;
1544 }
1545 ngd->pdev->dev.of_node = node;
1546 ctrl->ngd = ngd;
1547
1548 ret = platform_device_add(ngd->pdev);
1549 if (ret) {
1550 platform_device_put(ngd->pdev);
1551 kfree(ngd);
1552 of_node_put(node);
1553 return ret;
1554 }
1555 ngd->base = ctrl->base + ngd->id * data->offset +
1556 (ngd->id - 1) * data->size;
1557
1558 return 0;
1559 }
1560
1561 return -ENODEV;
1562 }
1563
qcom_slim_ngd_probe(struct platform_device * pdev)1564 static int qcom_slim_ngd_probe(struct platform_device *pdev)
1565 {
1566 struct device *dev = &pdev->dev;
1567 struct qcom_slim_ngd_ctrl *ctrl = dev_get_drvdata(dev->parent);
1568 int ret;
1569
1570 ctrl->ctrl.dev = dev;
1571
1572 platform_set_drvdata(pdev, ctrl);
1573 pm_runtime_use_autosuspend(dev);
1574 pm_runtime_set_autosuspend_delay(dev, QCOM_SLIM_NGD_AUTOSUSPEND);
1575 pm_runtime_set_suspended(dev);
1576 pm_runtime_enable(dev);
1577 pm_runtime_get_noresume(dev);
1578 ret = qcom_slim_ngd_qmi_svc_event_init(ctrl);
1579 if (ret) {
1580 dev_err(&pdev->dev, "QMI service registration failed:%d", ret);
1581 return ret;
1582 }
1583
1584 INIT_WORK(&ctrl->m_work, qcom_slim_ngd_master_worker);
1585 INIT_WORK(&ctrl->ngd_up_work, qcom_slim_ngd_up_worker);
1586 ctrl->mwq = create_singlethread_workqueue("ngd_master");
1587 if (!ctrl->mwq) {
1588 dev_err(&pdev->dev, "Failed to start master worker\n");
1589 ret = -ENOMEM;
1590 goto wq_err;
1591 }
1592
1593 return 0;
1594 wq_err:
1595 qcom_slim_ngd_qmi_svc_event_deinit(&ctrl->qmi);
1596 if (ctrl->mwq)
1597 destroy_workqueue(ctrl->mwq);
1598
1599 return ret;
1600 }
1601
qcom_slim_ngd_ctrl_probe(struct platform_device * pdev)1602 static int qcom_slim_ngd_ctrl_probe(struct platform_device *pdev)
1603 {
1604 struct device *dev = &pdev->dev;
1605 struct qcom_slim_ngd_ctrl *ctrl;
1606 int ret;
1607 struct pdr_service *pds;
1608
1609 ctrl = devm_kzalloc(dev, sizeof(*ctrl), GFP_KERNEL);
1610 if (!ctrl)
1611 return -ENOMEM;
1612
1613 dev_set_drvdata(dev, ctrl);
1614
1615 ctrl->base = devm_platform_get_and_ioremap_resource(pdev, 0, NULL);
1616 if (IS_ERR(ctrl->base))
1617 return PTR_ERR(ctrl->base);
1618
1619 ret = platform_get_irq(pdev, 0);
1620 if (ret < 0)
1621 return ret;
1622
1623 ret = devm_request_irq(dev, ret, qcom_slim_ngd_interrupt,
1624 IRQF_TRIGGER_HIGH, "slim-ngd", ctrl);
1625 if (ret)
1626 return dev_err_probe(&pdev->dev, ret, "request IRQ failed\n");
1627
1628 ctrl->nb.notifier_call = qcom_slim_ngd_ssr_notify;
1629 ctrl->notifier = qcom_register_ssr_notifier("lpass", &ctrl->nb);
1630 if (IS_ERR(ctrl->notifier))
1631 return PTR_ERR(ctrl->notifier);
1632
1633 ctrl->dev = dev;
1634 ctrl->framer.rootfreq = SLIM_ROOT_FREQ >> 3;
1635 ctrl->framer.superfreq =
1636 ctrl->framer.rootfreq / SLIM_CL_PER_SUPERFRAME_DIV8;
1637
1638 ctrl->ctrl.a_framer = &ctrl->framer;
1639 ctrl->ctrl.clkgear = SLIM_MAX_CLK_GEAR;
1640 ctrl->ctrl.get_laddr = qcom_slim_ngd_get_laddr;
1641 ctrl->ctrl.enable_stream = qcom_slim_ngd_enable_stream;
1642 ctrl->ctrl.xfer_msg = qcom_slim_ngd_xfer_msg;
1643 ctrl->ctrl.wakeup = NULL;
1644 ctrl->state = QCOM_SLIM_NGD_CTRL_DOWN;
1645
1646 mutex_init(&ctrl->tx_lock);
1647 mutex_init(&ctrl->ssr_lock);
1648 spin_lock_init(&ctrl->tx_buf_lock);
1649 init_completion(&ctrl->reconf);
1650 init_completion(&ctrl->qmi.qmi_comp);
1651 init_completion(&ctrl->qmi_up);
1652
1653 ctrl->pdr = pdr_handle_alloc(slim_pd_status, ctrl);
1654 if (IS_ERR(ctrl->pdr)) {
1655 ret = dev_err_probe(dev, PTR_ERR(ctrl->pdr),
1656 "Failed to init PDR handle\n");
1657 goto err_pdr_alloc;
1658 }
1659
1660 pds = pdr_add_lookup(ctrl->pdr, "avs/audio", "msm/adsp/audio_pd");
1661 if (IS_ERR(pds) && PTR_ERR(pds) != -EALREADY) {
1662 ret = dev_err_probe(dev, PTR_ERR(pds), "pdr add lookup failed\n");
1663 goto err_pdr_lookup;
1664 }
1665
1666 platform_driver_register(&qcom_slim_ngd_driver);
1667 return of_qcom_slim_ngd_register(dev, ctrl);
1668
1669 err_pdr_alloc:
1670 qcom_unregister_ssr_notifier(ctrl->notifier, &ctrl->nb);
1671
1672 err_pdr_lookup:
1673 pdr_handle_release(ctrl->pdr);
1674
1675 return ret;
1676 }
1677
qcom_slim_ngd_ctrl_remove(struct platform_device * pdev)1678 static int qcom_slim_ngd_ctrl_remove(struct platform_device *pdev)
1679 {
1680 platform_driver_unregister(&qcom_slim_ngd_driver);
1681
1682 return 0;
1683 }
1684
qcom_slim_ngd_remove(struct platform_device * pdev)1685 static int qcom_slim_ngd_remove(struct platform_device *pdev)
1686 {
1687 struct qcom_slim_ngd_ctrl *ctrl = platform_get_drvdata(pdev);
1688
1689 pm_runtime_disable(&pdev->dev);
1690 pdr_handle_release(ctrl->pdr);
1691 qcom_unregister_ssr_notifier(ctrl->notifier, &ctrl->nb);
1692 qcom_slim_ngd_enable(ctrl, false);
1693 qcom_slim_ngd_exit_dma(ctrl);
1694 qcom_slim_ngd_qmi_svc_event_deinit(&ctrl->qmi);
1695 if (ctrl->mwq)
1696 destroy_workqueue(ctrl->mwq);
1697
1698 kfree(ctrl->ngd);
1699 ctrl->ngd = NULL;
1700 return 0;
1701 }
1702
qcom_slim_ngd_runtime_idle(struct device * dev)1703 static int __maybe_unused qcom_slim_ngd_runtime_idle(struct device *dev)
1704 {
1705 struct qcom_slim_ngd_ctrl *ctrl = dev_get_drvdata(dev);
1706
1707 if (ctrl->state == QCOM_SLIM_NGD_CTRL_AWAKE)
1708 ctrl->state = QCOM_SLIM_NGD_CTRL_IDLE;
1709 pm_request_autosuspend(dev);
1710 return -EAGAIN;
1711 }
1712
qcom_slim_ngd_runtime_suspend(struct device * dev)1713 static int __maybe_unused qcom_slim_ngd_runtime_suspend(struct device *dev)
1714 {
1715 struct qcom_slim_ngd_ctrl *ctrl = dev_get_drvdata(dev);
1716 int ret = 0;
1717
1718 qcom_slim_ngd_exit_dma(ctrl);
1719 if (!ctrl->qmi.handle)
1720 return 0;
1721
1722 ret = qcom_slim_qmi_power_request(ctrl, false);
1723 if (ret && ret != -EBUSY)
1724 dev_info(ctrl->dev, "slim resource not idle:%d\n", ret);
1725 if (!ret || ret == -ETIMEDOUT)
1726 ctrl->state = QCOM_SLIM_NGD_CTRL_ASLEEP;
1727
1728 return ret;
1729 }
1730
1731 static const struct dev_pm_ops qcom_slim_ngd_dev_pm_ops = {
1732 SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
1733 pm_runtime_force_resume)
1734 SET_RUNTIME_PM_OPS(
1735 qcom_slim_ngd_runtime_suspend,
1736 qcom_slim_ngd_runtime_resume,
1737 qcom_slim_ngd_runtime_idle
1738 )
1739 };
1740
1741 static struct platform_driver qcom_slim_ngd_ctrl_driver = {
1742 .probe = qcom_slim_ngd_ctrl_probe,
1743 .remove = qcom_slim_ngd_ctrl_remove,
1744 .driver = {
1745 .name = "qcom,slim-ngd-ctrl",
1746 .of_match_table = qcom_slim_ngd_dt_match,
1747 },
1748 };
1749
1750 static struct platform_driver qcom_slim_ngd_driver = {
1751 .probe = qcom_slim_ngd_probe,
1752 .remove = qcom_slim_ngd_remove,
1753 .driver = {
1754 .name = QCOM_SLIM_NGD_DRV_NAME,
1755 .pm = &qcom_slim_ngd_dev_pm_ops,
1756 },
1757 };
1758
1759 module_platform_driver(qcom_slim_ngd_ctrl_driver);
1760 MODULE_LICENSE("GPL v2");
1761 MODULE_DESCRIPTION("Qualcomm SLIMBus NGD controller");
1762