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vt: vt_ioctl: fix VT_DISALLOCATE freeing in-use virtual console
[linux/fpc-iii.git] / drivers / slimbus / qcom-ngd-ctrl.c
blob9221ba7b78637b7e5a2f8b5791dff6f39a2dae00
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/of.h>
17 #include <linux/io.h>
18 #include <linux/soc/qcom/qmi.h>
19 #include <net/sock.h>
20 #include "slimbus.h"
21
22 /* NGD (Non-ported Generic Device) registers */
23 #define NGD_CFG 0x0
24 #define NGD_CFG_ENABLE BIT(0)
25 #define NGD_CFG_RX_MSGQ_EN BIT(1)
26 #define NGD_CFG_TX_MSGQ_EN BIT(2)
27 #define NGD_STATUS 0x4
28 #define NGD_LADDR BIT(1)
29 #define NGD_RX_MSGQ_CFG 0x8
30 #define NGD_INT_EN 0x10
31 #define NGD_INT_RECFG_DONE BIT(24)
32 #define NGD_INT_TX_NACKED_2 BIT(25)
33 #define NGD_INT_MSG_BUF_CONTE BIT(26)
34 #define NGD_INT_MSG_TX_INVAL BIT(27)
35 #define NGD_INT_IE_VE_CHG BIT(28)
36 #define NGD_INT_DEV_ERR BIT(29)
37 #define NGD_INT_RX_MSG_RCVD BIT(30)
38 #define NGD_INT_TX_MSG_SENT BIT(31)
39 #define NGD_INT_STAT 0x14
40 #define NGD_INT_CLR 0x18
41 #define DEF_NGD_INT_MASK (NGD_INT_TX_NACKED_2 | NGD_INT_MSG_BUF_CONTE | \
42 NGD_INT_MSG_TX_INVAL | NGD_INT_IE_VE_CHG | \
43 NGD_INT_DEV_ERR | NGD_INT_TX_MSG_SENT | \
44 NGD_INT_RX_MSG_RCVD)
45
46 /* Slimbus QMI service */
47 #define SLIMBUS_QMI_SVC_ID 0x0301
48 #define SLIMBUS_QMI_SVC_V1 1
49 #define SLIMBUS_QMI_INS_ID 0
50 #define SLIMBUS_QMI_SELECT_INSTANCE_REQ_V01 0x0020
51 #define SLIMBUS_QMI_SELECT_INSTANCE_RESP_V01 0x0020
52 #define SLIMBUS_QMI_POWER_REQ_V01 0x0021
53 #define SLIMBUS_QMI_POWER_RESP_V01 0x0021
54 #define SLIMBUS_QMI_CHECK_FRAMER_STATUS_REQ 0x0022
55 #define SLIMBUS_QMI_CHECK_FRAMER_STATUS_RESP 0x0022
56 #define SLIMBUS_QMI_POWER_REQ_MAX_MSG_LEN 14
57 #define SLIMBUS_QMI_POWER_RESP_MAX_MSG_LEN 7
58 #define SLIMBUS_QMI_SELECT_INSTANCE_REQ_MAX_MSG_LEN 14
59 #define SLIMBUS_QMI_SELECT_INSTANCE_RESP_MAX_MSG_LEN 7
60 #define SLIMBUS_QMI_CHECK_FRAMER_STAT_RESP_MAX_MSG_LEN 7
61 /* QMI response timeout of 500ms */
62 #define SLIMBUS_QMI_RESP_TOUT 1000
63
64 /* User defined commands */
65 #define SLIM_USR_MC_GENERIC_ACK 0x25
66 #define SLIM_USR_MC_MASTER_CAPABILITY 0x0
67 #define SLIM_USR_MC_REPORT_SATELLITE 0x1
68 #define SLIM_USR_MC_ADDR_QUERY 0xD
69 #define SLIM_USR_MC_ADDR_REPLY 0xE
70 #define SLIM_USR_MC_DEFINE_CHAN 0x20
71 #define SLIM_USR_MC_DEF_ACT_CHAN 0x21
72 #define SLIM_USR_MC_CHAN_CTRL 0x23
73 #define SLIM_USR_MC_RECONFIG_NOW 0x24
74 #define SLIM_USR_MC_REQ_BW 0x28
75 #define SLIM_USR_MC_CONNECT_SRC 0x2C
76 #define SLIM_USR_MC_CONNECT_SINK 0x2D
77 #define SLIM_USR_MC_DISCONNECT_PORT 0x2E
78 #define SLIM_USR_MC_REPEAT_CHANGE_VALUE 0x0
79
80 #define QCOM_SLIM_NGD_AUTOSUSPEND MSEC_PER_SEC
81 #define SLIM_RX_MSGQ_TIMEOUT_VAL 0x10000
82
83 #define SLIM_LA_MGR 0xFF
84 #define SLIM_ROOT_FREQ 24576000
85 #define LADDR_RETRY 5
86
87 /* Per spec.max 40 bytes per received message */
88 #define SLIM_MSGQ_BUF_LEN 40
89 #define QCOM_SLIM_NGD_DESC_NUM 32
90
91 #define SLIM_MSG_ASM_FIRST_WORD(l, mt, mc, dt, ad) \
92 ((l) | ((mt) << 5) | ((mc) << 8) | ((dt) << 15) | ((ad) << 16))
93
94 #define INIT_MX_RETRIES 10
95 #define DEF_RETRY_MS 10
96 #define SAT_MAGIC_LSB 0xD9
97 #define SAT_MAGIC_MSB 0xC5
98 #define SAT_MSG_VER 0x1
99 #define SAT_MSG_PROT 0x1
100 #define to_ngd(d) container_of(d, struct qcom_slim_ngd, dev)
101
102 struct ngd_reg_offset_data {
103 u32 offset, size;
104 };
105
106 static const struct ngd_reg_offset_data ngd_v1_5_offset_info = {
107 .offset = 0x1000,
108 .size = 0x1000,
109 };
110
111 enum qcom_slim_ngd_state {
112 QCOM_SLIM_NGD_CTRL_AWAKE,
113 QCOM_SLIM_NGD_CTRL_IDLE,
114 QCOM_SLIM_NGD_CTRL_ASLEEP,
115 QCOM_SLIM_NGD_CTRL_DOWN,
116 };
117
118 struct qcom_slim_ngd_qmi {
119 struct qmi_handle qmi;
120 struct sockaddr_qrtr svc_info;
121 struct qmi_handle svc_event_hdl;
122 struct qmi_response_type_v01 resp;
123 struct qmi_handle *handle;
124 struct completion qmi_comp;
125 };
126
127 struct qcom_slim_ngd_ctrl;
128 struct qcom_slim_ngd;
129
130 struct qcom_slim_ngd_dma_desc {
131 struct dma_async_tx_descriptor *desc;
132 struct qcom_slim_ngd_ctrl *ctrl;
133 struct completion *comp;
134 dma_cookie_t cookie;
135 dma_addr_t phys;
136 void *base;
137 };
138
139 struct qcom_slim_ngd {
140 struct platform_device *pdev;
141 void __iomem *base;
142 int id;
143 };
144
145 struct qcom_slim_ngd_ctrl {
146 struct slim_framer framer;
147 struct slim_controller ctrl;
148 struct qcom_slim_ngd_qmi qmi;
149 struct qcom_slim_ngd *ngd;
150 struct device *dev;
151 void __iomem *base;
152 struct dma_chan *dma_rx_channel;
153 struct dma_chan *dma_tx_channel;
154 struct qcom_slim_ngd_dma_desc rx_desc[QCOM_SLIM_NGD_DESC_NUM];
155 struct qcom_slim_ngd_dma_desc txdesc[QCOM_SLIM_NGD_DESC_NUM];
156 struct completion reconf;
157 struct work_struct m_work;
158 struct workqueue_struct *mwq;
159 spinlock_t tx_buf_lock;
160 enum qcom_slim_ngd_state state;
161 dma_addr_t rx_phys_base;
162 dma_addr_t tx_phys_base;
163 void *rx_base;
164 void *tx_base;
165 int tx_tail;
166 int tx_head;
167 u32 ver;
168 };
169
170 enum slimbus_mode_enum_type_v01 {
171 /* To force a 32 bit signed enum. Do not change or use*/
172 SLIMBUS_MODE_ENUM_TYPE_MIN_ENUM_VAL_V01 = INT_MIN,
173 SLIMBUS_MODE_SATELLITE_V01 = 1,
174 SLIMBUS_MODE_MASTER_V01 = 2,
175 SLIMBUS_MODE_ENUM_TYPE_MAX_ENUM_VAL_V01 = INT_MAX,
176 };
177
178 enum slimbus_pm_enum_type_v01 {
179 /* To force a 32 bit signed enum. Do not change or use*/
180 SLIMBUS_PM_ENUM_TYPE_MIN_ENUM_VAL_V01 = INT_MIN,
181 SLIMBUS_PM_INACTIVE_V01 = 1,
182 SLIMBUS_PM_ACTIVE_V01 = 2,
183 SLIMBUS_PM_ENUM_TYPE_MAX_ENUM_VAL_V01 = INT_MAX,
184 };
185
186 enum slimbus_resp_enum_type_v01 {
187 SLIMBUS_RESP_ENUM_TYPE_MIN_VAL_V01 = INT_MIN,
188 SLIMBUS_RESP_SYNCHRONOUS_V01 = 1,
189 SLIMBUS_RESP_ENUM_TYPE_MAX_VAL_V01 = INT_MAX,
190 };
191
192 struct slimbus_select_inst_req_msg_v01 {
193 uint32_t instance;
194 uint8_t mode_valid;
195 enum slimbus_mode_enum_type_v01 mode;
196 };
197
198 struct slimbus_select_inst_resp_msg_v01 {
199 struct qmi_response_type_v01 resp;
200 };
201
202 struct slimbus_power_req_msg_v01 {
203 enum slimbus_pm_enum_type_v01 pm_req;
204 uint8_t resp_type_valid;
205 enum slimbus_resp_enum_type_v01 resp_type;
206 };
207
208 struct slimbus_power_resp_msg_v01 {
209 struct qmi_response_type_v01 resp;
210 };
211
212 static struct qmi_elem_info slimbus_select_inst_req_msg_v01_ei[] = {
213 {
214 .data_type = QMI_UNSIGNED_4_BYTE,
215 .elem_len = 1,
216 .elem_size = sizeof(uint32_t),
217 .array_type = NO_ARRAY,
218 .tlv_type = 0x01,
219 .offset = offsetof(struct slimbus_select_inst_req_msg_v01,
220 instance),
221 .ei_array = NULL,
222 },
223 {
224 .data_type = QMI_OPT_FLAG,
225 .elem_len = 1,
226 .elem_size = sizeof(uint8_t),
227 .array_type = NO_ARRAY,
228 .tlv_type = 0x10,
229 .offset = offsetof(struct slimbus_select_inst_req_msg_v01,
230 mode_valid),
231 .ei_array = NULL,
232 },
233 {
234 .data_type = QMI_UNSIGNED_4_BYTE,
235 .elem_len = 1,
236 .elem_size = sizeof(enum slimbus_mode_enum_type_v01),
237 .array_type = NO_ARRAY,
238 .tlv_type = 0x10,
239 .offset = offsetof(struct slimbus_select_inst_req_msg_v01,
240 mode),
241 .ei_array = NULL,
242 },
243 {
244 .data_type = QMI_EOTI,
245 .elem_len = 0,
246 .elem_size = 0,
247 .array_type = NO_ARRAY,
248 .tlv_type = 0x00,
249 .offset = 0,
250 .ei_array = NULL,
251 },
252 };
253
254 static struct qmi_elem_info slimbus_select_inst_resp_msg_v01_ei[] = {
255 {
256 .data_type = QMI_STRUCT,
257 .elem_len = 1,
258 .elem_size = sizeof(struct qmi_response_type_v01),
259 .array_type = NO_ARRAY,
260 .tlv_type = 0x02,
261 .offset = offsetof(struct slimbus_select_inst_resp_msg_v01,
262 resp),
263 .ei_array = qmi_response_type_v01_ei,
264 },
265 {
266 .data_type = QMI_EOTI,
267 .elem_len = 0,
268 .elem_size = 0,
269 .array_type = NO_ARRAY,
270 .tlv_type = 0x00,
271 .offset = 0,
272 .ei_array = NULL,
273 },
274 };
275
276 static struct qmi_elem_info slimbus_power_req_msg_v01_ei[] = {
277 {
278 .data_type = QMI_UNSIGNED_4_BYTE,
279 .elem_len = 1,
280 .elem_size = sizeof(enum slimbus_pm_enum_type_v01),
281 .array_type = NO_ARRAY,
282 .tlv_type = 0x01,
283 .offset = offsetof(struct slimbus_power_req_msg_v01,
284 pm_req),
285 .ei_array = NULL,
286 },
287 {
288 .data_type = QMI_OPT_FLAG,
289 .elem_len = 1,
290 .elem_size = sizeof(uint8_t),
291 .array_type = NO_ARRAY,
292 .tlv_type = 0x10,
293 .offset = offsetof(struct slimbus_power_req_msg_v01,
294 resp_type_valid),
295 },
296 {
297 .data_type = QMI_SIGNED_4_BYTE_ENUM,
298 .elem_len = 1,
299 .elem_size = sizeof(enum slimbus_resp_enum_type_v01),
300 .array_type = NO_ARRAY,
301 .tlv_type = 0x10,
302 .offset = offsetof(struct slimbus_power_req_msg_v01,
303 resp_type),
304 },
305 {
306 .data_type = QMI_EOTI,
307 .elem_len = 0,
308 .elem_size = 0,
309 .array_type = NO_ARRAY,
310 .tlv_type = 0x00,
311 .offset = 0,
312 .ei_array = NULL,
313 },
314 };
315
316 static struct qmi_elem_info slimbus_power_resp_msg_v01_ei[] = {
317 {
318 .data_type = QMI_STRUCT,
319 .elem_len = 1,
320 .elem_size = sizeof(struct qmi_response_type_v01),
321 .array_type = NO_ARRAY,
322 .tlv_type = 0x02,
323 .offset = offsetof(struct slimbus_power_resp_msg_v01, resp),
324 .ei_array = qmi_response_type_v01_ei,
325 },
326 {
327 .data_type = QMI_EOTI,
328 .elem_len = 0,
329 .elem_size = 0,
330 .array_type = NO_ARRAY,
331 .tlv_type = 0x00,
332 .offset = 0,
333 .ei_array = NULL,
334 },
335 };
336
337 static int qcom_slim_qmi_send_select_inst_req(struct qcom_slim_ngd_ctrl *ctrl,
338 struct slimbus_select_inst_req_msg_v01 *req)
339 {
340 struct slimbus_select_inst_resp_msg_v01 resp = { { 0, 0 } };
341 struct qmi_txn txn;
342 int rc;
343
344 rc = qmi_txn_init(ctrl->qmi.handle, &txn,
345 slimbus_select_inst_resp_msg_v01_ei, &resp);
346 if (rc < 0) {
347 dev_err(ctrl->dev, "QMI TXN init fail: %d\n", rc);
348 return rc;
349 }
350
351 rc = qmi_send_request(ctrl->qmi.handle, NULL, &txn,
352 SLIMBUS_QMI_SELECT_INSTANCE_REQ_V01,
353 SLIMBUS_QMI_SELECT_INSTANCE_REQ_MAX_MSG_LEN,
354 slimbus_select_inst_req_msg_v01_ei, req);
355 if (rc < 0) {
356 dev_err(ctrl->dev, "QMI send req fail %d\n", rc);
357 qmi_txn_cancel(&txn);
358 return rc;
359 }
360
361 rc = qmi_txn_wait(&txn, SLIMBUS_QMI_RESP_TOUT);
362 if (rc < 0) {
363 dev_err(ctrl->dev, "QMI TXN wait fail: %d\n", rc);
364 return rc;
365 }
366 /* Check the response */
367 if (resp.resp.result != QMI_RESULT_SUCCESS_V01) {
368 dev_err(ctrl->dev, "QMI request failed 0x%x\n",
369 resp.resp.result);
370 return -EREMOTEIO;
371 }
372
373 return 0;
374 }
375
376 static void qcom_slim_qmi_power_resp_cb(struct qmi_handle *handle,
377 struct sockaddr_qrtr *sq,
378 struct qmi_txn *txn, const void *data)
379 {
380 struct slimbus_power_resp_msg_v01 *resp;
381
382 resp = (struct slimbus_power_resp_msg_v01 *)data;
383 if (resp->resp.result != QMI_RESULT_SUCCESS_V01)
384 pr_err("QMI power request failed 0x%x\n",
385 resp->resp.result);
386
387 complete(&txn->completion);
388 }
389
390 static int qcom_slim_qmi_send_power_request(struct qcom_slim_ngd_ctrl *ctrl,
391 struct slimbus_power_req_msg_v01 *req)
392 {
393 struct slimbus_power_resp_msg_v01 resp = { { 0, 0 } };
394 struct qmi_txn txn;
395 int rc;
396
397 rc = qmi_txn_init(ctrl->qmi.handle, &txn,
398 slimbus_power_resp_msg_v01_ei, &resp);
399
400 rc = qmi_send_request(ctrl->qmi.handle, NULL, &txn,
401 SLIMBUS_QMI_POWER_REQ_V01,
402 SLIMBUS_QMI_POWER_REQ_MAX_MSG_LEN,
403 slimbus_power_req_msg_v01_ei, req);
404 if (rc < 0) {
405 dev_err(ctrl->dev, "QMI send req fail %d\n", rc);
406 qmi_txn_cancel(&txn);
407 return rc;
408 }
409
410 rc = qmi_txn_wait(&txn, SLIMBUS_QMI_RESP_TOUT);
411 if (rc < 0) {
412 dev_err(ctrl->dev, "QMI TXN wait fail: %d\n", rc);
413 return rc;
414 }
415
416 /* Check the response */
417 if (resp.resp.result != QMI_RESULT_SUCCESS_V01) {
418 dev_err(ctrl->dev, "QMI request failed 0x%x\n",
419 resp.resp.result);
420 return -EREMOTEIO;
421 }
422
423 return 0;
424 }
425
426 static struct qmi_msg_handler qcom_slim_qmi_msg_handlers[] = {
427 {
428 .type = QMI_RESPONSE,
429 .msg_id = SLIMBUS_QMI_POWER_RESP_V01,
430 .ei = slimbus_power_resp_msg_v01_ei,
431 .decoded_size = sizeof(struct slimbus_power_resp_msg_v01),
432 .fn = qcom_slim_qmi_power_resp_cb,
433 },
434 {}
435 };
436
437 static int qcom_slim_qmi_init(struct qcom_slim_ngd_ctrl *ctrl,
438 bool apps_is_master)
439 {
440 struct slimbus_select_inst_req_msg_v01 req;
441 struct qmi_handle *handle;
442 int rc;
443
444 handle = devm_kzalloc(ctrl->dev, sizeof(*handle), GFP_KERNEL);
445 if (!handle)
446 return -ENOMEM;
447
448 rc = qmi_handle_init(handle, SLIMBUS_QMI_POWER_REQ_MAX_MSG_LEN,
449 NULL, qcom_slim_qmi_msg_handlers);
450 if (rc < 0) {
451 dev_err(ctrl->dev, "QMI client init failed: %d\n", rc);
452 goto qmi_handle_init_failed;
453 }
454
455 rc = kernel_connect(handle->sock,
456 (struct sockaddr *)&ctrl->qmi.svc_info,
457 sizeof(ctrl->qmi.svc_info), 0);
458 if (rc < 0) {
459 dev_err(ctrl->dev, "Remote Service connect failed: %d\n", rc);
460 goto qmi_connect_to_service_failed;
461 }
462
463 /* Instance is 0 based */
464 req.instance = (ctrl->ngd->id >> 1);
465 req.mode_valid = 1;
466
467 /* Mode indicates the role of the ADSP */
468 if (apps_is_master)
469 req.mode = SLIMBUS_MODE_SATELLITE_V01;
470 else
471 req.mode = SLIMBUS_MODE_MASTER_V01;
472
473 ctrl->qmi.handle = handle;
474
475 rc = qcom_slim_qmi_send_select_inst_req(ctrl, &req);
476 if (rc) {
477 dev_err(ctrl->dev, "failed to select h/w instance\n");
478 goto qmi_select_instance_failed;
479 }
480
481 return 0;
482
483 qmi_select_instance_failed:
484 ctrl->qmi.handle = NULL;
485 qmi_connect_to_service_failed:
486 qmi_handle_release(handle);
487 qmi_handle_init_failed:
488 devm_kfree(ctrl->dev, handle);
489 return rc;
490 }
491
492 static void qcom_slim_qmi_exit(struct qcom_slim_ngd_ctrl *ctrl)
493 {
494 if (!ctrl->qmi.handle)
495 return;
496
497 qmi_handle_release(ctrl->qmi.handle);
498 devm_kfree(ctrl->dev, ctrl->qmi.handle);
499 ctrl->qmi.handle = NULL;
500 }
501
502 static int qcom_slim_qmi_power_request(struct qcom_slim_ngd_ctrl *ctrl,
503 bool active)
504 {
505 struct slimbus_power_req_msg_v01 req;
506
507 if (active)
508 req.pm_req = SLIMBUS_PM_ACTIVE_V01;
509 else
510 req.pm_req = SLIMBUS_PM_INACTIVE_V01;
511
512 req.resp_type_valid = 0;
513
514 return qcom_slim_qmi_send_power_request(ctrl, &req);
515 }
516
517 static u32 *qcom_slim_ngd_tx_msg_get(struct qcom_slim_ngd_ctrl *ctrl, int len,
518 struct completion *comp)
519 {
520 struct qcom_slim_ngd_dma_desc *desc;
521 unsigned long flags;
522
523 spin_lock_irqsave(&ctrl->tx_buf_lock, flags);
524
525 if ((ctrl->tx_tail + 1) % QCOM_SLIM_NGD_DESC_NUM == ctrl->tx_head) {
526 spin_unlock_irqrestore(&ctrl->tx_buf_lock, flags);
527 return NULL;
528 }
529 desc = &ctrl->txdesc[ctrl->tx_tail];
530 desc->base = ctrl->tx_base + ctrl->tx_tail * SLIM_MSGQ_BUF_LEN;
531 desc->comp = comp;
532 ctrl->tx_tail = (ctrl->tx_tail + 1) % QCOM_SLIM_NGD_DESC_NUM;
533
534 spin_unlock_irqrestore(&ctrl->tx_buf_lock, flags);
535
536 return desc->base;
537 }
538
539 static void qcom_slim_ngd_tx_msg_dma_cb(void *args)
540 {
541 struct qcom_slim_ngd_dma_desc *desc = args;
542 struct qcom_slim_ngd_ctrl *ctrl = desc->ctrl;
543 unsigned long flags;
544
545 spin_lock_irqsave(&ctrl->tx_buf_lock, flags);
546
547 if (desc->comp) {
548 complete(desc->comp);
549 desc->comp = NULL;
550 }
551
552 ctrl->tx_head = (ctrl->tx_head + 1) % QCOM_SLIM_NGD_DESC_NUM;
553 spin_unlock_irqrestore(&ctrl->tx_buf_lock, flags);
554 }
555
556 static int qcom_slim_ngd_tx_msg_post(struct qcom_slim_ngd_ctrl *ctrl,
557 void *buf, int len)
558 {
559 struct qcom_slim_ngd_dma_desc *desc;
560 unsigned long flags;
561 int index, offset;
562
563 spin_lock_irqsave(&ctrl->tx_buf_lock, flags);
564 offset = buf - ctrl->tx_base;
565 index = offset/SLIM_MSGQ_BUF_LEN;
566
567 desc = &ctrl->txdesc[index];
568 desc->phys = ctrl->tx_phys_base + offset;
569 desc->base = ctrl->tx_base + offset;
570 desc->ctrl = ctrl;
571 len = (len + 3) & 0xfc;
572
573 desc->desc = dmaengine_prep_slave_single(ctrl->dma_tx_channel,
574 desc->phys, len,
575 DMA_MEM_TO_DEV,
576 DMA_PREP_INTERRUPT);
577 if (!desc->desc) {
578 dev_err(ctrl->dev, "unable to prepare channel\n");
579 spin_unlock_irqrestore(&ctrl->tx_buf_lock, flags);
580 return -EINVAL;
581 }
582
583 desc->desc->callback = qcom_slim_ngd_tx_msg_dma_cb;
584 desc->desc->callback_param = desc;
585 desc->desc->cookie = dmaengine_submit(desc->desc);
586 dma_async_issue_pending(ctrl->dma_tx_channel);
587 spin_unlock_irqrestore(&ctrl->tx_buf_lock, flags);
588
589 return 0;
590 }
591
592 static void qcom_slim_ngd_rx(struct qcom_slim_ngd_ctrl *ctrl, u8 *buf)
593 {
594 u8 mc, mt, len;
595
596 mt = SLIM_HEADER_GET_MT(buf[0]);
597 len = SLIM_HEADER_GET_RL(buf[0]);
598 mc = SLIM_HEADER_GET_MC(buf[1]);
599
600 if (mc == SLIM_USR_MC_MASTER_CAPABILITY &&
601 mt == SLIM_MSG_MT_SRC_REFERRED_USER)
602 queue_work(ctrl->mwq, &ctrl->m_work);
603
604 if (mc == SLIM_MSG_MC_REPLY_INFORMATION ||
605 mc == SLIM_MSG_MC_REPLY_VALUE || (mc == SLIM_USR_MC_ADDR_REPLY &&
606 mt == SLIM_MSG_MT_SRC_REFERRED_USER) ||
607 (mc == SLIM_USR_MC_GENERIC_ACK &&
608 mt == SLIM_MSG_MT_SRC_REFERRED_USER)) {
609 slim_msg_response(&ctrl->ctrl, &buf[4], buf[3], len - 4);
610 pm_runtime_mark_last_busy(ctrl->dev);
611 }
612 }
613
614 static void qcom_slim_ngd_rx_msgq_cb(void *args)
615 {
616 struct qcom_slim_ngd_dma_desc *desc = args;
617 struct qcom_slim_ngd_ctrl *ctrl = desc->ctrl;
618
619 qcom_slim_ngd_rx(ctrl, (u8 *)desc->base);
620 /* Add descriptor back to the queue */
621 desc->desc = dmaengine_prep_slave_single(ctrl->dma_rx_channel,
622 desc->phys, SLIM_MSGQ_BUF_LEN,
623 DMA_DEV_TO_MEM,
624 DMA_PREP_INTERRUPT);
625 if (!desc->desc) {
626 dev_err(ctrl->dev, "Unable to prepare rx channel\n");
627 return;
628 }
629
630 desc->desc->callback = qcom_slim_ngd_rx_msgq_cb;
631 desc->desc->callback_param = desc;
632 desc->desc->cookie = dmaengine_submit(desc->desc);
633 dma_async_issue_pending(ctrl->dma_rx_channel);
634 }
635
636 static int qcom_slim_ngd_post_rx_msgq(struct qcom_slim_ngd_ctrl *ctrl)
637 {
638 struct qcom_slim_ngd_dma_desc *desc;
639 int i;
640
641 for (i = 0; i < QCOM_SLIM_NGD_DESC_NUM; i++) {
642 desc = &ctrl->rx_desc[i];
643 desc->phys = ctrl->rx_phys_base + i * SLIM_MSGQ_BUF_LEN;
644 desc->ctrl = ctrl;
645 desc->base = ctrl->rx_base + i * SLIM_MSGQ_BUF_LEN;
646 desc->desc = dmaengine_prep_slave_single(ctrl->dma_rx_channel,
647 desc->phys, SLIM_MSGQ_BUF_LEN,
648 DMA_DEV_TO_MEM,
649 DMA_PREP_INTERRUPT);
650 if (!desc->desc) {
651 dev_err(ctrl->dev, "Unable to prepare rx channel\n");
652 return -EINVAL;
653 }
654
655 desc->desc->callback = qcom_slim_ngd_rx_msgq_cb;
656 desc->desc->callback_param = desc;
657 desc->desc->cookie = dmaengine_submit(desc->desc);
658 }
659 dma_async_issue_pending(ctrl->dma_rx_channel);
660
661 return 0;
662 }
663
664 static int qcom_slim_ngd_init_rx_msgq(struct qcom_slim_ngd_ctrl *ctrl)
665 {
666 struct device *dev = ctrl->dev;
667 int ret, size;
668
669 ctrl->dma_rx_channel = dma_request_slave_channel(dev, "rx");
670 if (!ctrl->dma_rx_channel) {
671 dev_err(dev, "Failed to request dma channels");
672 return -EINVAL;
673 }
674
675 size = QCOM_SLIM_NGD_DESC_NUM * SLIM_MSGQ_BUF_LEN;
676 ctrl->rx_base = dma_alloc_coherent(dev, size, &ctrl->rx_phys_base,
677 GFP_KERNEL);
678 if (!ctrl->rx_base) {
679 dev_err(dev, "dma_alloc_coherent failed\n");
680 ret = -ENOMEM;
681 goto rel_rx;
682 }
683
684 ret = qcom_slim_ngd_post_rx_msgq(ctrl);
685 if (ret) {
686 dev_err(dev, "post_rx_msgq() failed 0x%x\n", ret);
687 goto rx_post_err;
688 }
689
690 return 0;
691
692 rx_post_err:
693 dma_free_coherent(dev, size, ctrl->rx_base, ctrl->rx_phys_base);
694 rel_rx:
695 dma_release_channel(ctrl->dma_rx_channel);
696 return ret;
697 }
698
699 static int qcom_slim_ngd_init_tx_msgq(struct qcom_slim_ngd_ctrl *ctrl)
700 {
701 struct device *dev = ctrl->dev;
702 unsigned long flags;
703 int ret = 0;
704 int size;
705
706 ctrl->dma_tx_channel = dma_request_slave_channel(dev, "tx");
707 if (!ctrl->dma_tx_channel) {
708 dev_err(dev, "Failed to request dma channels");
709 return -EINVAL;
710 }
711
712 size = ((QCOM_SLIM_NGD_DESC_NUM + 1) * SLIM_MSGQ_BUF_LEN);
713 ctrl->tx_base = dma_alloc_coherent(dev, size, &ctrl->tx_phys_base,
714 GFP_KERNEL);
715 if (!ctrl->tx_base) {
716 dev_err(dev, "dma_alloc_coherent failed\n");
717 ret = -EINVAL;
718 goto rel_tx;
719 }
720
721 spin_lock_irqsave(&ctrl->tx_buf_lock, flags);
722 ctrl->tx_tail = 0;
723 ctrl->tx_head = 0;
724 spin_unlock_irqrestore(&ctrl->tx_buf_lock, flags);
725
726 return 0;
727 rel_tx:
728 dma_release_channel(ctrl->dma_tx_channel);
729 return ret;
730 }
731
732 static int qcom_slim_ngd_init_dma(struct qcom_slim_ngd_ctrl *ctrl)
733 {
734 int ret = 0;
735
736 ret = qcom_slim_ngd_init_rx_msgq(ctrl);
737 if (ret) {
738 dev_err(ctrl->dev, "rx dma init failed\n");
739 return ret;
740 }
741
742 ret = qcom_slim_ngd_init_tx_msgq(ctrl);
743 if (ret)
744 dev_err(ctrl->dev, "tx dma init failed\n");
745
746 return ret;
747 }
748
749 static irqreturn_t qcom_slim_ngd_interrupt(int irq, void *d)
750 {
751 struct qcom_slim_ngd_ctrl *ctrl = d;
752 void __iomem *base = ctrl->ngd->base;
753 u32 stat = readl(base + NGD_INT_STAT);
754
755 if ((stat & NGD_INT_MSG_BUF_CONTE) ||
756 (stat & NGD_INT_MSG_TX_INVAL) || (stat & NGD_INT_DEV_ERR) ||
757 (stat & NGD_INT_TX_NACKED_2)) {
758 dev_err(ctrl->dev, "Error Interrupt received 0x%x\n", stat);
759 }
760
761 writel(stat, base + NGD_INT_CLR);
762
763 return IRQ_HANDLED;
764 }
765
766 static int qcom_slim_ngd_xfer_msg(struct slim_controller *sctrl,
767 struct slim_msg_txn *txn)
768 {
769 struct qcom_slim_ngd_ctrl *ctrl = dev_get_drvdata(sctrl->dev);
770 DECLARE_COMPLETION_ONSTACK(tx_sent);
771 DECLARE_COMPLETION_ONSTACK(done);
772 int ret, timeout, i;
773 u8 wbuf[SLIM_MSGQ_BUF_LEN];
774 u8 rbuf[SLIM_MSGQ_BUF_LEN];
775 u32 *pbuf;
776 u8 *puc;
777 u8 la = txn->la;
778 bool usr_msg = false;
779
780 if (txn->mc & SLIM_MSG_CLK_PAUSE_SEQ_FLG)
781 return -EPROTONOSUPPORT;
782
783 if (txn->mt == SLIM_MSG_MT_CORE &&
784 (txn->mc >= SLIM_MSG_MC_BEGIN_RECONFIGURATION &&
785 txn->mc <= SLIM_MSG_MC_RECONFIGURE_NOW))
786 return 0;
787
788 if (txn->dt == SLIM_MSG_DEST_ENUMADDR)
789 return -EPROTONOSUPPORT;
790
791 if (txn->msg->num_bytes > SLIM_MSGQ_BUF_LEN ||
792 txn->rl > SLIM_MSGQ_BUF_LEN) {
793 dev_err(ctrl->dev, "msg exeeds HW limit\n");
794 return -EINVAL;
795 }
796
797 pbuf = qcom_slim_ngd_tx_msg_get(ctrl, txn->rl, &tx_sent);
798 if (!pbuf) {
799 dev_err(ctrl->dev, "Message buffer unavailable\n");
800 return -ENOMEM;
801 }
802
803 if (txn->mt == SLIM_MSG_MT_CORE &&
804 (txn->mc == SLIM_MSG_MC_CONNECT_SOURCE ||
805 txn->mc == SLIM_MSG_MC_CONNECT_SINK ||
806 txn->mc == SLIM_MSG_MC_DISCONNECT_PORT)) {
807 txn->mt = SLIM_MSG_MT_DEST_REFERRED_USER;
808 switch (txn->mc) {
809 case SLIM_MSG_MC_CONNECT_SOURCE:
810 txn->mc = SLIM_USR_MC_CONNECT_SRC;
811 break;
812 case SLIM_MSG_MC_CONNECT_SINK:
813 txn->mc = SLIM_USR_MC_CONNECT_SINK;
814 break;
815 case SLIM_MSG_MC_DISCONNECT_PORT:
816 txn->mc = SLIM_USR_MC_DISCONNECT_PORT;
817 break;
818 default:
819 return -EINVAL;
820 }
821
822 usr_msg = true;
823 i = 0;
824 wbuf[i++] = txn->la;
825 la = SLIM_LA_MGR;
826 wbuf[i++] = txn->msg->wbuf[0];
827 if (txn->mc != SLIM_USR_MC_DISCONNECT_PORT)
828 wbuf[i++] = txn->msg->wbuf[1];
829
830 txn->comp = &done;
831 ret = slim_alloc_txn_tid(sctrl, txn);
832 if (ret) {
833 dev_err(ctrl->dev, "Unable to allocate TID\n");
834 return ret;
835 }
836
837 wbuf[i++] = txn->tid;
838
839 txn->msg->num_bytes = i;
840 txn->msg->wbuf = wbuf;
841 txn->msg->rbuf = rbuf;
842 txn->rl = txn->msg->num_bytes + 4;
843 }
844
845 /* HW expects length field to be excluded */
846 txn->rl--;
847 puc = (u8 *)pbuf;
848 *pbuf = 0;
849 if (txn->dt == SLIM_MSG_DEST_LOGICALADDR) {
850 *pbuf = SLIM_MSG_ASM_FIRST_WORD(txn->rl, txn->mt, txn->mc, 0,
851 la);
852 puc += 3;
853 } else {
854 *pbuf = SLIM_MSG_ASM_FIRST_WORD(txn->rl, txn->mt, txn->mc, 1,
855 la);
856 puc += 2;
857 }
858
859 if (slim_tid_txn(txn->mt, txn->mc))
860 *(puc++) = txn->tid;
861
862 if (slim_ec_txn(txn->mt, txn->mc)) {
863 *(puc++) = (txn->ec & 0xFF);
864 *(puc++) = (txn->ec >> 8) & 0xFF;
865 }
866
867 if (txn->msg && txn->msg->wbuf)
868 memcpy(puc, txn->msg->wbuf, txn->msg->num_bytes);
869
870 ret = qcom_slim_ngd_tx_msg_post(ctrl, pbuf, txn->rl);
871 if (ret)
872 return ret;
873
874 timeout = wait_for_completion_timeout(&tx_sent, HZ);
875 if (!timeout) {
876 dev_err(sctrl->dev, "TX timed out:MC:0x%x,mt:0x%x", txn->mc,
877 txn->mt);
878 return -ETIMEDOUT;
879 }
880
881 if (usr_msg) {
882 timeout = wait_for_completion_timeout(&done, HZ);
883 if (!timeout) {
884 dev_err(sctrl->dev, "TX timed out:MC:0x%x,mt:0x%x",
885 txn->mc, txn->mt);
886 return -ETIMEDOUT;
887 }
888 }
889
890 return 0;
891 }
892
893 static int qcom_slim_ngd_xfer_msg_sync(struct slim_controller *ctrl,
894 struct slim_msg_txn *txn)
895 {
896 DECLARE_COMPLETION_ONSTACK(done);
897 int ret, timeout;
898
899 pm_runtime_get_sync(ctrl->dev);
900
901 txn->comp = &done;
902
903 ret = qcom_slim_ngd_xfer_msg(ctrl, txn);
904 if (ret)
905 return ret;
906
907 timeout = wait_for_completion_timeout(&done, HZ);
908 if (!timeout) {
909 dev_err(ctrl->dev, "TX timed out:MC:0x%x,mt:0x%x", txn->mc,
910 txn->mt);
911 return -ETIMEDOUT;
912 }
913 return 0;
914 }
915
916 static int qcom_slim_ngd_enable_stream(struct slim_stream_runtime *rt)
917 {
918 struct slim_device *sdev = rt->dev;
919 struct slim_controller *ctrl = sdev->ctrl;
920 struct slim_val_inf msg = {0};
921 u8 wbuf[SLIM_MSGQ_BUF_LEN];
922 u8 rbuf[SLIM_MSGQ_BUF_LEN];
923 struct slim_msg_txn txn = {0,};
924 int i, ret;
925
926 txn.mt = SLIM_MSG_MT_DEST_REFERRED_USER;
927 txn.dt = SLIM_MSG_DEST_LOGICALADDR;
928 txn.la = SLIM_LA_MGR;
929 txn.ec = 0;
930 txn.msg = &msg;
931 txn.msg->num_bytes = 0;
932 txn.msg->wbuf = wbuf;
933 txn.msg->rbuf = rbuf;
934
935 for (i = 0; i < rt->num_ports; i++) {
936 struct slim_port *port = &rt->ports[i];
937
938 if (txn.msg->num_bytes == 0) {
939 int seg_interval = SLIM_SLOTS_PER_SUPERFRAME/rt->ratem;
940 int exp;
941
942 wbuf[txn.msg->num_bytes++] = sdev->laddr;
943 wbuf[txn.msg->num_bytes] = rt->bps >> 2 |
944 (port->ch.aux_fmt << 6);
945
946 /* Data channel segment interval not multiple of 3 */
947 exp = seg_interval % 3;
948 if (exp)
949 wbuf[txn.msg->num_bytes] |= BIT(5);
950
951 txn.msg->num_bytes++;
952 wbuf[txn.msg->num_bytes++] = exp << 4 | rt->prot;
953
954 if (rt->prot == SLIM_PROTO_ISO)
955 wbuf[txn.msg->num_bytes++] =
956 port->ch.prrate |
957 SLIM_CHANNEL_CONTENT_FL;
958 else
959 wbuf[txn.msg->num_bytes++] = port->ch.prrate;
960
961 ret = slim_alloc_txn_tid(ctrl, &txn);
962 if (ret) {
963 dev_err(&sdev->dev, "Fail to allocate TID\n");
964 return -ENXIO;
965 }
966 wbuf[txn.msg->num_bytes++] = txn.tid;
967 }
968 wbuf[txn.msg->num_bytes++] = port->ch.id;
969 }
970
971 txn.mc = SLIM_USR_MC_DEF_ACT_CHAN;
972 txn.rl = txn.msg->num_bytes + 4;
973 ret = qcom_slim_ngd_xfer_msg_sync(ctrl, &txn);
974 if (ret) {
975 slim_free_txn_tid(ctrl, &txn);
976 dev_err(&sdev->dev, "TX timed out:MC:0x%x,mt:0x%x", txn.mc,
977 txn.mt);
978 return ret;
979 }
980
981 txn.mc = SLIM_USR_MC_RECONFIG_NOW;
982 txn.msg->num_bytes = 2;
983 wbuf[1] = sdev->laddr;
984 txn.rl = txn.msg->num_bytes + 4;
985
986 ret = slim_alloc_txn_tid(ctrl, &txn);
987 if (ret) {
988 dev_err(ctrl->dev, "Fail to allocate TID\n");
989 return ret;
990 }
991
992 wbuf[0] = txn.tid;
993 ret = qcom_slim_ngd_xfer_msg_sync(ctrl, &txn);
994 if (ret) {
995 slim_free_txn_tid(ctrl, &txn);
996 dev_err(&sdev->dev, "TX timed out:MC:0x%x,mt:0x%x", txn.mc,
997 txn.mt);
998 }
999
1000 return ret;
1001 }
1002
1003 static int qcom_slim_ngd_get_laddr(struct slim_controller *ctrl,
1004 struct slim_eaddr *ea, u8 *laddr)
1005 {
1006 struct slim_val_inf msg = {0};
1007 struct slim_msg_txn txn;
1008 u8 wbuf[10] = {0};
1009 u8 rbuf[10] = {0};
1010 int ret;
1011
1012 txn.mt = SLIM_MSG_MT_DEST_REFERRED_USER;
1013 txn.dt = SLIM_MSG_DEST_LOGICALADDR;
1014 txn.la = SLIM_LA_MGR;
1015 txn.ec = 0;
1016
1017 txn.mc = SLIM_USR_MC_ADDR_QUERY;
1018 txn.rl = 11;
1019 txn.msg = &msg;
1020 txn.msg->num_bytes = 7;
1021 txn.msg->wbuf = wbuf;
1022 txn.msg->rbuf = rbuf;
1023
1024 ret = slim_alloc_txn_tid(ctrl, &txn);
1025 if (ret < 0)
1026 return ret;
1027
1028 wbuf[0] = (u8)txn.tid;
1029 memcpy(&wbuf[1], ea, sizeof(*ea));
1030
1031 ret = qcom_slim_ngd_xfer_msg_sync(ctrl, &txn);
1032 if (ret) {
1033 slim_free_txn_tid(ctrl, &txn);
1034 return ret;
1035 }
1036
1037 *laddr = rbuf[6];
1038
1039 return ret;
1040 }
1041
1042 static int qcom_slim_ngd_exit_dma(struct qcom_slim_ngd_ctrl *ctrl)
1043 {
1044 if (ctrl->dma_rx_channel) {
1045 dmaengine_terminate_sync(ctrl->dma_rx_channel);
1046 dma_release_channel(ctrl->dma_rx_channel);
1047 }
1048
1049 if (ctrl->dma_tx_channel) {
1050 dmaengine_terminate_sync(ctrl->dma_tx_channel);
1051 dma_release_channel(ctrl->dma_tx_channel);
1052 }
1053
1054 ctrl->dma_tx_channel = ctrl->dma_rx_channel = NULL;
1055
1056 return 0;
1057 }
1058
1059 static void qcom_slim_ngd_setup(struct qcom_slim_ngd_ctrl *ctrl)
1060 {
1061 u32 cfg = readl_relaxed(ctrl->ngd->base);
1062
1063 if (ctrl->state == QCOM_SLIM_NGD_CTRL_DOWN)
1064 qcom_slim_ngd_init_dma(ctrl);
1065
1066 /* By default enable message queues */
1067 cfg |= NGD_CFG_RX_MSGQ_EN;
1068 cfg |= NGD_CFG_TX_MSGQ_EN;
1069
1070 /* Enable NGD if it's not already enabled*/
1071 if (!(cfg & NGD_CFG_ENABLE))
1072 cfg |= NGD_CFG_ENABLE;
1073
1074 writel_relaxed(cfg, ctrl->ngd->base);
1075 }
1076
1077 static int qcom_slim_ngd_power_up(struct qcom_slim_ngd_ctrl *ctrl)
1078 {
1079 enum qcom_slim_ngd_state cur_state = ctrl->state;
1080 struct qcom_slim_ngd *ngd = ctrl->ngd;
1081 u32 laddr, rx_msgq;
1082 int timeout, ret = 0;
1083
1084 if (ctrl->state == QCOM_SLIM_NGD_CTRL_DOWN) {
1085 timeout = wait_for_completion_timeout(&ctrl->qmi.qmi_comp, HZ);
1086 if (!timeout)
1087 return -EREMOTEIO;
1088 }
1089
1090 if (ctrl->state == QCOM_SLIM_NGD_CTRL_ASLEEP ||
1091 ctrl->state == QCOM_SLIM_NGD_CTRL_DOWN) {
1092 ret = qcom_slim_qmi_power_request(ctrl, true);
1093 if (ret) {
1094 dev_err(ctrl->dev, "SLIM QMI power request failed:%d\n",
1095 ret);
1096 return ret;
1097 }
1098 }
1099
1100 ctrl->ver = readl_relaxed(ctrl->base);
1101 /* Version info in 16 MSbits */
1102 ctrl->ver >>= 16;
1103
1104 laddr = readl_relaxed(ngd->base + NGD_STATUS);
1105 if (laddr & NGD_LADDR) {
1106 /*
1107 * external MDM restart case where ADSP itself was active framer
1108 * For example, modem restarted when playback was active
1109 */
1110 if (cur_state == QCOM_SLIM_NGD_CTRL_AWAKE) {
1111 dev_info(ctrl->dev, "Subsys restart: ADSP active framer\n");
1112 return 0;
1113 }
1114 return 0;
1115 }
1116
1117 writel_relaxed(DEF_NGD_INT_MASK, ngd->base + NGD_INT_EN);
1118 rx_msgq = readl_relaxed(ngd->base + NGD_RX_MSGQ_CFG);
1119
1120 writel_relaxed(rx_msgq|SLIM_RX_MSGQ_TIMEOUT_VAL,
1121 ngd->base + NGD_RX_MSGQ_CFG);
1122 qcom_slim_ngd_setup(ctrl);
1123
1124 timeout = wait_for_completion_timeout(&ctrl->reconf, HZ);
1125 if (!timeout) {
1126 dev_err(ctrl->dev, "capability exchange timed-out\n");
1127 return -ETIMEDOUT;
1128 }
1129
1130 return 0;
1131 }
1132
1133 static void qcom_slim_ngd_notify_slaves(struct qcom_slim_ngd_ctrl *ctrl)
1134 {
1135 struct slim_device *sbdev;
1136 struct device_node *node;
1137
1138 for_each_child_of_node(ctrl->ngd->pdev->dev.of_node, node) {
1139 sbdev = of_slim_get_device(&ctrl->ctrl, node);
1140 if (!sbdev)
1141 continue;
1142
1143 if (slim_get_logical_addr(sbdev))
1144 dev_err(ctrl->dev, "Failed to get logical address\n");
1145 }
1146 }
1147
1148 static void qcom_slim_ngd_master_worker(struct work_struct *work)
1149 {
1150 struct qcom_slim_ngd_ctrl *ctrl;
1151 struct slim_msg_txn txn;
1152 struct slim_val_inf msg = {0};
1153 int retries = 0;
1154 u8 wbuf[8];
1155 int ret = 0;
1156
1157 ctrl = container_of(work, struct qcom_slim_ngd_ctrl, m_work);
1158 txn.dt = SLIM_MSG_DEST_LOGICALADDR;
1159 txn.ec = 0;
1160 txn.mc = SLIM_USR_MC_REPORT_SATELLITE;
1161 txn.mt = SLIM_MSG_MT_SRC_REFERRED_USER;
1162 txn.la = SLIM_LA_MGR;
1163 wbuf[0] = SAT_MAGIC_LSB;
1164 wbuf[1] = SAT_MAGIC_MSB;
1165 wbuf[2] = SAT_MSG_VER;
1166 wbuf[3] = SAT_MSG_PROT;
1167 txn.msg = &msg;
1168 txn.msg->wbuf = wbuf;
1169 txn.msg->num_bytes = 4;
1170 txn.rl = 8;
1171
1172 dev_info(ctrl->dev, "SLIM SAT: Rcvd master capability\n");
1173
1174 capability_retry:
1175 ret = qcom_slim_ngd_xfer_msg(&ctrl->ctrl, &txn);
1176 if (!ret) {
1177 if (ctrl->state >= QCOM_SLIM_NGD_CTRL_ASLEEP)
1178 complete(&ctrl->reconf);
1179 else
1180 dev_err(ctrl->dev, "unexpected state:%d\n",
1181 ctrl->state);
1182
1183 if (ctrl->state == QCOM_SLIM_NGD_CTRL_DOWN)
1184 qcom_slim_ngd_notify_slaves(ctrl);
1185
1186 } else if (ret == -EIO) {
1187 dev_err(ctrl->dev, "capability message NACKed, retrying\n");
1188 if (retries < INIT_MX_RETRIES) {
1189 msleep(DEF_RETRY_MS);
1190 retries++;
1191 goto capability_retry;
1192 }
1193 } else {
1194 dev_err(ctrl->dev, "SLIM: capability TX failed:%d\n", ret);
1195 }
1196 }
1197
1198 static int qcom_slim_ngd_runtime_resume(struct device *dev)
1199 {
1200 struct qcom_slim_ngd_ctrl *ctrl = dev_get_drvdata(dev);
1201 int ret = 0;
1202
1203 if (ctrl->state >= QCOM_SLIM_NGD_CTRL_ASLEEP)
1204 ret = qcom_slim_ngd_power_up(ctrl);
1205 if (ret) {
1206 /* Did SSR cause this power up failure */
1207 if (ctrl->state != QCOM_SLIM_NGD_CTRL_DOWN)
1208 ctrl->state = QCOM_SLIM_NGD_CTRL_ASLEEP;
1209 else
1210 dev_err(ctrl->dev, "HW wakeup attempt during SSR\n");
1211 } else {
1212 ctrl->state = QCOM_SLIM_NGD_CTRL_AWAKE;
1213 }
1214
1215 return 0;
1216 }
1217
1218 static int qcom_slim_ngd_enable(struct qcom_slim_ngd_ctrl *ctrl, bool enable)
1219 {
1220 if (enable) {
1221 int ret = qcom_slim_qmi_init(ctrl, false);
1222
1223 if (ret) {
1224 dev_err(ctrl->dev, "qmi init fail, ret:%d, state:%d\n",
1225 ret, ctrl->state);
1226 return ret;
1227 }
1228 /* controller state should be in sync with framework state */
1229 complete(&ctrl->qmi.qmi_comp);
1230 if (!pm_runtime_enabled(ctrl->dev) ||
1231 !pm_runtime_suspended(ctrl->dev))
1232 qcom_slim_ngd_runtime_resume(ctrl->dev);
1233 else
1234 pm_runtime_resume(ctrl->dev);
1235 pm_runtime_mark_last_busy(ctrl->dev);
1236 pm_runtime_put(ctrl->dev);
1237
1238 ret = slim_register_controller(&ctrl->ctrl);
1239 if (ret) {
1240 dev_err(ctrl->dev, "error adding slim controller\n");
1241 return ret;
1242 }
1243
1244 dev_info(ctrl->dev, "SLIM controller Registered\n");
1245 } else {
1246 qcom_slim_qmi_exit(ctrl);
1247 slim_unregister_controller(&ctrl->ctrl);
1248 }
1249
1250 return 0;
1251 }
1252
1253 static int qcom_slim_ngd_qmi_new_server(struct qmi_handle *hdl,
1254 struct qmi_service *service)
1255 {
1256 struct qcom_slim_ngd_qmi *qmi =
1257 container_of(hdl, struct qcom_slim_ngd_qmi, svc_event_hdl);
1258 struct qcom_slim_ngd_ctrl *ctrl =
1259 container_of(qmi, struct qcom_slim_ngd_ctrl, qmi);
1260
1261 qmi->svc_info.sq_family = AF_QIPCRTR;
1262 qmi->svc_info.sq_node = service->node;
1263 qmi->svc_info.sq_port = service->port;
1264
1265 qcom_slim_ngd_enable(ctrl, true);
1266
1267 return 0;
1268 }
1269
1270 static void qcom_slim_ngd_qmi_del_server(struct qmi_handle *hdl,
1271 struct qmi_service *service)
1272 {
1273 struct qcom_slim_ngd_qmi *qmi =
1274 container_of(hdl, struct qcom_slim_ngd_qmi, svc_event_hdl);
1275
1276 qmi->svc_info.sq_node = 0;
1277 qmi->svc_info.sq_port = 0;
1278 }
1279
1280 static struct qmi_ops qcom_slim_ngd_qmi_svc_event_ops = {
1281 .new_server = qcom_slim_ngd_qmi_new_server,
1282 .del_server = qcom_slim_ngd_qmi_del_server,
1283 };
1284
1285 static int qcom_slim_ngd_qmi_svc_event_init(struct qcom_slim_ngd_ctrl *ctrl)
1286 {
1287 struct qcom_slim_ngd_qmi *qmi = &ctrl->qmi;
1288 int ret;
1289
1290 ret = qmi_handle_init(&qmi->svc_event_hdl, 0,
1291 &qcom_slim_ngd_qmi_svc_event_ops, NULL);
1292 if (ret < 0) {
1293 dev_err(ctrl->dev, "qmi_handle_init failed: %d\n", ret);
1294 return ret;
1295 }
1296
1297 ret = qmi_add_lookup(&qmi->svc_event_hdl, SLIMBUS_QMI_SVC_ID,
1298 SLIMBUS_QMI_SVC_V1, SLIMBUS_QMI_INS_ID);
1299 if (ret < 0) {
1300 dev_err(ctrl->dev, "qmi_add_lookup failed: %d\n", ret);
1301 qmi_handle_release(&qmi->svc_event_hdl);
1302 }
1303 return ret;
1304 }
1305
1306 static void qcom_slim_ngd_qmi_svc_event_deinit(struct qcom_slim_ngd_qmi *qmi)
1307 {
1308 qmi_handle_release(&qmi->svc_event_hdl);
1309 }
1310
1311 static struct platform_driver qcom_slim_ngd_driver;
1312 #define QCOM_SLIM_NGD_DRV_NAME "qcom,slim-ngd"
1313
1314 static const struct of_device_id qcom_slim_ngd_dt_match[] = {
1315 {
1316 .compatible = "qcom,slim-ngd-v1.5.0",
1317 .data = &ngd_v1_5_offset_info,
1318 },
1319 {}
1320 };
1321
1322 MODULE_DEVICE_TABLE(of, qcom_slim_ngd_dt_match);
1323
1324 static int of_qcom_slim_ngd_register(struct device *parent,
1325 struct qcom_slim_ngd_ctrl *ctrl)
1326 {
1327 const struct ngd_reg_offset_data *data;
1328 struct qcom_slim_ngd *ngd;
1329 const struct of_device_id *match;
1330 struct device_node *node;
1331 u32 id;
1332
1333 match = of_match_node(qcom_slim_ngd_dt_match, parent->of_node);
1334 data = match->data;
1335 for_each_available_child_of_node(parent->of_node, node) {
1336 if (of_property_read_u32(node, "reg", &id))
1337 continue;
1338
1339 ngd = kzalloc(sizeof(*ngd), GFP_KERNEL);
1340 if (!ngd)
1341 return -ENOMEM;
1342
1343 ngd->pdev = platform_device_alloc(QCOM_SLIM_NGD_DRV_NAME, id);
1344 if (!ngd->pdev) {
1345 kfree(ngd);
1346 return -ENOMEM;
1347 }
1348 ngd->id = id;
1349 ngd->pdev->dev.parent = parent;
1350 ngd->pdev->driver_override = QCOM_SLIM_NGD_DRV_NAME;
1351 ngd->pdev->dev.of_node = node;
1352 ctrl->ngd = ngd;
1353 platform_set_drvdata(ngd->pdev, ctrl);
1354
1355 platform_device_add(ngd->pdev);
1356 ngd->base = ctrl->base + ngd->id * data->offset +
1357 (ngd->id - 1) * data->size;
1358 ctrl->ngd = ngd;
1359
1360 return 0;
1361 }
1362
1363 return -ENODEV;
1364 }
1365
1366 static int qcom_slim_ngd_probe(struct platform_device *pdev)
1367 {
1368 struct qcom_slim_ngd_ctrl *ctrl = platform_get_drvdata(pdev);
1369 struct device *dev = &pdev->dev;
1370 int ret;
1371
1372 ctrl->ctrl.dev = dev;
1373
1374 pm_runtime_use_autosuspend(dev);
1375 pm_runtime_set_autosuspend_delay(dev, QCOM_SLIM_NGD_AUTOSUSPEND);
1376 pm_runtime_set_suspended(dev);
1377 pm_runtime_enable(dev);
1378 pm_runtime_get_noresume(dev);
1379 ret = qcom_slim_ngd_qmi_svc_event_init(ctrl);
1380 if (ret) {
1381 dev_err(&pdev->dev, "QMI service registration failed:%d", ret);
1382 return ret;
1383 }
1384
1385 INIT_WORK(&ctrl->m_work, qcom_slim_ngd_master_worker);
1386 ctrl->mwq = create_singlethread_workqueue("ngd_master");
1387 if (!ctrl->mwq) {
1388 dev_err(&pdev->dev, "Failed to start master worker\n");
1389 ret = -ENOMEM;
1390 goto wq_err;
1391 }
1392
1393 return 0;
1394 wq_err:
1395 qcom_slim_ngd_qmi_svc_event_deinit(&ctrl->qmi);
1396 if (ctrl->mwq)
1397 destroy_workqueue(ctrl->mwq);
1398
1399 return ret;
1400 }
1401
1402 static int qcom_slim_ngd_ctrl_probe(struct platform_device *pdev)
1403 {
1404 struct device *dev = &pdev->dev;
1405 struct qcom_slim_ngd_ctrl *ctrl;
1406 struct resource *res;
1407 int ret;
1408
1409 ctrl = devm_kzalloc(dev, sizeof(*ctrl), GFP_KERNEL);
1410 if (!ctrl)
1411 return -ENOMEM;
1412
1413 dev_set_drvdata(dev, ctrl);
1414
1415 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1416 ctrl->base = devm_ioremap_resource(dev, res);
1417 if (IS_ERR(ctrl->base))
1418 return PTR_ERR(ctrl->base);
1419
1420 res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
1421 if (!res) {
1422 dev_err(&pdev->dev, "no slimbus IRQ resource\n");
1423 return -ENODEV;
1424 }
1425
1426 ret = devm_request_irq(dev, res->start, qcom_slim_ngd_interrupt,
1427 IRQF_TRIGGER_HIGH, "slim-ngd", ctrl);
1428 if (ret) {
1429 dev_err(&pdev->dev, "request IRQ failed\n");
1430 return ret;
1431 }
1432
1433 ctrl->dev = dev;
1434 ctrl->framer.rootfreq = SLIM_ROOT_FREQ >> 3;
1435 ctrl->framer.superfreq =
1436 ctrl->framer.rootfreq / SLIM_CL_PER_SUPERFRAME_DIV8;
1437
1438 ctrl->ctrl.a_framer = &ctrl->framer;
1439 ctrl->ctrl.clkgear = SLIM_MAX_CLK_GEAR;
1440 ctrl->ctrl.get_laddr = qcom_slim_ngd_get_laddr;
1441 ctrl->ctrl.enable_stream = qcom_slim_ngd_enable_stream;
1442 ctrl->ctrl.xfer_msg = qcom_slim_ngd_xfer_msg;
1443 ctrl->ctrl.wakeup = NULL;
1444 ctrl->state = QCOM_SLIM_NGD_CTRL_DOWN;
1445
1446 spin_lock_init(&ctrl->tx_buf_lock);
1447 init_completion(&ctrl->reconf);
1448 init_completion(&ctrl->qmi.qmi_comp);
1449
1450 platform_driver_register(&qcom_slim_ngd_driver);
1451 return of_qcom_slim_ngd_register(dev, ctrl);
1452 }
1453
1454 static int qcom_slim_ngd_ctrl_remove(struct platform_device *pdev)
1455 {
1456 platform_driver_unregister(&qcom_slim_ngd_driver);
1457
1458 return 0;
1459 }
1460
1461 static int qcom_slim_ngd_remove(struct platform_device *pdev)
1462 {
1463 struct qcom_slim_ngd_ctrl *ctrl = platform_get_drvdata(pdev);
1464
1465 pm_runtime_disable(&pdev->dev);
1466 qcom_slim_ngd_enable(ctrl, false);
1467 qcom_slim_ngd_exit_dma(ctrl);
1468 qcom_slim_ngd_qmi_svc_event_deinit(&ctrl->qmi);
1469 if (ctrl->mwq)
1470 destroy_workqueue(ctrl->mwq);
1471
1472 kfree(ctrl->ngd);
1473 ctrl->ngd = NULL;
1474 return 0;
1475 }
1476
1477 static int __maybe_unused qcom_slim_ngd_runtime_idle(struct device *dev)
1478 {
1479 struct qcom_slim_ngd_ctrl *ctrl = dev_get_drvdata(dev);
1480
1481 if (ctrl->state == QCOM_SLIM_NGD_CTRL_AWAKE)
1482 ctrl->state = QCOM_SLIM_NGD_CTRL_IDLE;
1483 pm_request_autosuspend(dev);
1484 return -EAGAIN;
1485 }
1486
1487 static int __maybe_unused qcom_slim_ngd_runtime_suspend(struct device *dev)
1488 {
1489 struct qcom_slim_ngd_ctrl *ctrl = dev_get_drvdata(dev);
1490 int ret = 0;
1491
1492 ret = qcom_slim_qmi_power_request(ctrl, false);
1493 if (ret && ret != -EBUSY)
1494 dev_info(ctrl->dev, "slim resource not idle:%d\n", ret);
1495 if (!ret || ret == -ETIMEDOUT)
1496 ctrl->state = QCOM_SLIM_NGD_CTRL_ASLEEP;
1497
1498 return ret;
1499 }
1500
1501 static const struct dev_pm_ops qcom_slim_ngd_dev_pm_ops = {
1502 SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
1503 pm_runtime_force_resume)
1504 SET_RUNTIME_PM_OPS(
1505 qcom_slim_ngd_runtime_suspend,
1506 qcom_slim_ngd_runtime_resume,
1507 qcom_slim_ngd_runtime_idle
1508 )
1509 };
1510
1511 static struct platform_driver qcom_slim_ngd_ctrl_driver = {
1512 .probe = qcom_slim_ngd_ctrl_probe,
1513 .remove = qcom_slim_ngd_ctrl_remove,
1514 .driver = {
1515 .name = "qcom,slim-ngd-ctrl",
1516 .of_match_table = qcom_slim_ngd_dt_match,
1517 },
1518 };
1519
1520 static struct platform_driver qcom_slim_ngd_driver = {
1521 .probe = qcom_slim_ngd_probe,
1522 .remove = qcom_slim_ngd_remove,
1523 .driver = {
1524 .name = QCOM_SLIM_NGD_DRV_NAME,
1525 .pm = &qcom_slim_ngd_dev_pm_ops,
1526 },
1527 };
1528
1529 module_platform_driver(qcom_slim_ngd_ctrl_driver);
1530 MODULE_LICENSE("GPL v2");
1531 MODULE_DESCRIPTION("Qualcomm SLIMBus NGD controller");
Linux with added FPC-III support