drivers/slimbus/qcom-ngd-ctrl.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 // Copyright (c) 2011-2017, The Linux Foundation. All rights reserved.
   3 // Copyright (c) 2018, Linaro Limited
   4
   5 #include <linux/irq.h>
   6 #include <linux/kernel.h>
   7 #include <linux/init.h>
   8 #include <linux/slab.h>
   9 #include <linux/interrupt.h>
  10 #include <linux/platform_device.h>
  11 #include <linux/dma-mapping.h>
  12 #include <linux/dmaengine.h>
  13 #include <linux/slimbus.h>
  14 #include <linux/delay.h>
  15 #include <linux/pm_runtime.h>
  16 #include <linux/mutex.h>
  17 #include <linux/notifier.h>
  18 #include <linux/remoteproc/qcom_rproc.h>
  19 #include <linux/of.h>
  20 #include <linux/io.h>
  21 #include <linux/soc/qcom/qmi.h>
  22 #include <linux/soc/qcom/pdr.h>
  23 #include <net/sock.h>
  24 #include "slimbus.h"
  25
  26 /* NGD (Non-ported Generic Device) registers */
  27 #define NGD_CFG                 0x0
  28 #define NGD_CFG_ENABLE          BIT(0)
  29 #define NGD_CFG_RX_MSGQ_EN      BIT(1)
  30 #define NGD_CFG_TX_MSGQ_EN      BIT(2)
  31 #define NGD_STATUS              0x4
  32 #define NGD_LADDR               BIT(1)
  33 #define NGD_RX_MSGQ_CFG         0x8
  34 #define NGD_INT_EN              0x10
  35 #define NGD_INT_RECFG_DONE      BIT(24)
  36 #define NGD_INT_TX_NACKED_2     BIT(25)
  37 #define NGD_INT_MSG_BUF_CONTE   BIT(26)
  38 #define NGD_INT_MSG_TX_INVAL    BIT(27)
  39 #define NGD_INT_IE_VE_CHG       BIT(28)
  40 #define NGD_INT_DEV_ERR         BIT(29)
  41 #define NGD_INT_RX_MSG_RCVD     BIT(30)
  42 #define NGD_INT_TX_MSG_SENT     BIT(31)
  43 #define NGD_INT_STAT            0x14
  44 #define NGD_INT_CLR             0x18
  45 #define DEF_NGD_INT_MASK (NGD_INT_TX_NACKED_2 | NGD_INT_MSG_BUF_CONTE | \
  46                                 NGD_INT_MSG_TX_INVAL | NGD_INT_IE_VE_CHG | \
  47                                 NGD_INT_DEV_ERR | NGD_INT_TX_MSG_SENT | \
  48                                 NGD_INT_RX_MSG_RCVD)
  49
  50 /* Slimbus QMI service */
  51 #define SLIMBUS_QMI_SVC_ID      0x0301
  52 #define SLIMBUS_QMI_SVC_V1      1
  53 #define SLIMBUS_QMI_INS_ID      0
  54 #define SLIMBUS_QMI_SELECT_INSTANCE_REQ_V01     0x0020
  55 #define SLIMBUS_QMI_SELECT_INSTANCE_RESP_V01    0x0020
  56 #define SLIMBUS_QMI_POWER_REQ_V01               0x0021
  57 #define SLIMBUS_QMI_POWER_RESP_V01              0x0021
  58 #define SLIMBUS_QMI_CHECK_FRAMER_STATUS_REQ     0x0022
  59 #define SLIMBUS_QMI_CHECK_FRAMER_STATUS_RESP    0x0022
  60 #define SLIMBUS_QMI_POWER_REQ_MAX_MSG_LEN       14
  61 #define SLIMBUS_QMI_POWER_RESP_MAX_MSG_LEN      7
  62 #define SLIMBUS_QMI_SELECT_INSTANCE_REQ_MAX_MSG_LEN     14
  63 #define SLIMBUS_QMI_SELECT_INSTANCE_RESP_MAX_MSG_LEN    7
  64 #define SLIMBUS_QMI_CHECK_FRAMER_STAT_RESP_MAX_MSG_LEN  7
  65 /* QMI response timeout of 500ms */
  66 #define SLIMBUS_QMI_RESP_TOUT   1000
  67
  68 /* User defined commands */
  69 #define SLIM_USR_MC_GENERIC_ACK 0x25
  70 #define SLIM_USR_MC_MASTER_CAPABILITY   0x0
  71 #define SLIM_USR_MC_REPORT_SATELLITE    0x1
  72 #define SLIM_USR_MC_ADDR_QUERY          0xD
  73 #define SLIM_USR_MC_ADDR_REPLY          0xE
  74 #define SLIM_USR_MC_DEFINE_CHAN         0x20
  75 #define SLIM_USR_MC_DEF_ACT_CHAN        0x21
  76 #define SLIM_USR_MC_CHAN_CTRL           0x23
  77 #define SLIM_USR_MC_RECONFIG_NOW        0x24
  78 #define SLIM_USR_MC_REQ_BW              0x28
  79 #define SLIM_USR_MC_CONNECT_SRC         0x2C
  80 #define SLIM_USR_MC_CONNECT_SINK        0x2D
  81 #define SLIM_USR_MC_DISCONNECT_PORT     0x2E
  82 #define SLIM_USR_MC_REPEAT_CHANGE_VALUE 0x0
  83
  84 #define QCOM_SLIM_NGD_AUTOSUSPEND       MSEC_PER_SEC
  85 #define SLIM_RX_MSGQ_TIMEOUT_VAL        0x10000
  86
  87 #define SLIM_LA_MGR     0xFF
  88 #define SLIM_ROOT_FREQ  24576000
  89 #define LADDR_RETRY     5
  90
  91 /* Per spec.max 40 bytes per received message */
  92 #define SLIM_MSGQ_BUF_LEN       40
  93 #define QCOM_SLIM_NGD_DESC_NUM  32
  94
  95 #define SLIM_MSG_ASM_FIRST_WORD(l, mt, mc, dt, ad) \
  96                 ((l) | ((mt) << 5) | ((mc) << 8) | ((dt) << 15) | ((ad) << 16))
  97
  98 #define INIT_MX_RETRIES 10
  99 #define DEF_RETRY_MS    10
 100 #define SAT_MAGIC_LSB   0xD9
 101 #define SAT_MAGIC_MSB   0xC5
 102 #define SAT_MSG_VER     0x1
 103 #define SAT_MSG_PROT    0x1
 104 #define to_ngd(d)       container_of(d, struct qcom_slim_ngd, dev)
 105
 106 struct ngd_reg_offset_data {
 107         u32 offset, size;
 108 };
 109
 110 static const struct ngd_reg_offset_data ngd_v1_5_offset_info = {
 111         .offset = 0x1000,
 112         .size = 0x1000,
 113 };
 114
 115 enum qcom_slim_ngd_state {
 116         QCOM_SLIM_NGD_CTRL_AWAKE,
 117         QCOM_SLIM_NGD_CTRL_IDLE,
 118         QCOM_SLIM_NGD_CTRL_ASLEEP,
 119         QCOM_SLIM_NGD_CTRL_DOWN,
 120 };
 121
 122 struct qcom_slim_ngd_qmi {
 123         struct qmi_handle qmi;
 124         struct sockaddr_qrtr svc_info;
 125         struct qmi_handle svc_event_hdl;
 126         struct qmi_response_type_v01 resp;
 127         struct qmi_handle *handle;
 128         struct completion qmi_comp;
 129 };
 130
 131 struct qcom_slim_ngd_ctrl;
 132 struct qcom_slim_ngd;
 133
 134 struct qcom_slim_ngd_dma_desc {
 135         struct dma_async_tx_descriptor *desc;
 136         struct qcom_slim_ngd_ctrl *ctrl;
 137         struct completion *comp;
 138         dma_cookie_t cookie;
 139         dma_addr_t phys;
 140         void *base;
 141 };
 142
 143 struct qcom_slim_ngd {
 144         struct platform_device *pdev;
 145         void __iomem *base;
 146         int id;
 147 };
 148
 149 struct qcom_slim_ngd_ctrl {
 150         struct slim_framer framer;
 151         struct slim_controller ctrl;
 152         struct qcom_slim_ngd_qmi qmi;
 153         struct qcom_slim_ngd *ngd;
 154         struct device *dev;
 155         void __iomem *base;
 156         struct dma_chan *dma_rx_channel;
 157         struct dma_chan *dma_tx_channel;
 158         struct qcom_slim_ngd_dma_desc rx_desc[QCOM_SLIM_NGD_DESC_NUM];
 159         struct qcom_slim_ngd_dma_desc txdesc[QCOM_SLIM_NGD_DESC_NUM];
 160         struct completion reconf;
 161         struct work_struct m_work;
 162         struct work_struct ngd_up_work;
 163         struct workqueue_struct *mwq;
 164         struct completion qmi_up;
 165         spinlock_t tx_buf_lock;
 166         struct mutex tx_lock;
 167         struct mutex ssr_lock;
 168         struct notifier_block nb;
 169         void *notifier;
 170         struct pdr_handle *pdr;
 171         enum qcom_slim_ngd_state state;
 172         dma_addr_t rx_phys_base;
 173         dma_addr_t tx_phys_base;
 174         void *rx_base;
 175         void *tx_base;
 176         int tx_tail;
 177         int tx_head;
 178         u32 ver;
 179 };
 180
 181 enum slimbus_mode_enum_type_v01 {
 182         /* To force a 32 bit signed enum. Do not change or use*/
 183         SLIMBUS_MODE_ENUM_TYPE_MIN_ENUM_VAL_V01 = INT_MIN,
 184         SLIMBUS_MODE_SATELLITE_V01 = 1,
 185         SLIMBUS_MODE_MASTER_V01 = 2,
 186         SLIMBUS_MODE_ENUM_TYPE_MAX_ENUM_VAL_V01 = INT_MAX,
 187 };
 188
 189 enum slimbus_pm_enum_type_v01 {
 190         /* To force a 32 bit signed enum. Do not change or use*/
 191         SLIMBUS_PM_ENUM_TYPE_MIN_ENUM_VAL_V01 = INT_MIN,
 192         SLIMBUS_PM_INACTIVE_V01 = 1,
 193         SLIMBUS_PM_ACTIVE_V01 = 2,
 194         SLIMBUS_PM_ENUM_TYPE_MAX_ENUM_VAL_V01 = INT_MAX,
 195 };
 196
 197 enum slimbus_resp_enum_type_v01 {
 198         SLIMBUS_RESP_ENUM_TYPE_MIN_VAL_V01 = INT_MIN,
 199         SLIMBUS_RESP_SYNCHRONOUS_V01 = 1,
 200         SLIMBUS_RESP_ENUM_TYPE_MAX_VAL_V01 = INT_MAX,
 201 };
 202
 203 struct slimbus_select_inst_req_msg_v01 {
 204         uint32_t instance;
 205         uint8_t mode_valid;
 206         enum slimbus_mode_enum_type_v01 mode;
 207 };
 208
 209 struct slimbus_select_inst_resp_msg_v01 {
 210         struct qmi_response_type_v01 resp;
 211 };
 212
 213 struct slimbus_power_req_msg_v01 {
 214         enum slimbus_pm_enum_type_v01 pm_req;
 215         uint8_t resp_type_valid;
 216         enum slimbus_resp_enum_type_v01 resp_type;
 217 };
 218
 219 struct slimbus_power_resp_msg_v01 {
 220         struct qmi_response_type_v01 resp;
 221 };
 222
 223 static struct qmi_elem_info slimbus_select_inst_req_msg_v01_ei[] = {
 224         {
 225                 .data_type  = QMI_UNSIGNED_4_BYTE,
 226                 .elem_len   = 1,
 227                 .elem_size  = sizeof(uint32_t),
 228                 .array_type = NO_ARRAY,
 229                 .tlv_type   = 0x01,
 230                 .offset     = offsetof(struct slimbus_select_inst_req_msg_v01,
 231                                        instance),
 232                 .ei_array   = NULL,
 233         },
 234         {
 235                 .data_type  = QMI_OPT_FLAG,
 236                 .elem_len   = 1,
 237                 .elem_size  = sizeof(uint8_t),
 238                 .array_type = NO_ARRAY,
 239                 .tlv_type   = 0x10,
 240                 .offset     = offsetof(struct slimbus_select_inst_req_msg_v01,
 241                                        mode_valid),
 242                 .ei_array   = NULL,
 243         },
 244         {
 245                 .data_type  = QMI_UNSIGNED_4_BYTE,
 246                 .elem_len   = 1,
 247                 .elem_size  = sizeof(enum slimbus_mode_enum_type_v01),
 248                 .array_type = NO_ARRAY,
 249                 .tlv_type   = 0x10,
 250                 .offset     = offsetof(struct slimbus_select_inst_req_msg_v01,
 251                                        mode),
 252                 .ei_array   = NULL,
 253         },
 254         {
 255                 .data_type  = QMI_EOTI,
 256                 .elem_len   = 0,
 257                 .elem_size  = 0,
 258                 .array_type = NO_ARRAY,
 259                 .tlv_type   = 0x00,
 260                 .offset     = 0,
 261                 .ei_array   = NULL,
 262         },
 263 };
 264
 265 static struct qmi_elem_info slimbus_select_inst_resp_msg_v01_ei[] = {
 266         {
 267                 .data_type  = QMI_STRUCT,
 268                 .elem_len   = 1,
 269                 .elem_size  = sizeof(struct qmi_response_type_v01),
 270                 .array_type = NO_ARRAY,
 271                 .tlv_type   = 0x02,
 272                 .offset     = offsetof(struct slimbus_select_inst_resp_msg_v01,
 273                                        resp),
 274                 .ei_array   = qmi_response_type_v01_ei,
 275         },
 276         {
 277                 .data_type  = QMI_EOTI,
 278                 .elem_len   = 0,
 279                 .elem_size  = 0,
 280                 .array_type = NO_ARRAY,
 281                 .tlv_type   = 0x00,
 282                 .offset     = 0,
 283                 .ei_array   = NULL,
 284         },
 285 };
 286
 287 static struct qmi_elem_info slimbus_power_req_msg_v01_ei[] = {
 288         {
 289                 .data_type  = QMI_UNSIGNED_4_BYTE,
 290                 .elem_len   = 1,
 291                 .elem_size  = sizeof(enum slimbus_pm_enum_type_v01),
 292                 .array_type = NO_ARRAY,
 293                 .tlv_type   = 0x01,
 294                 .offset     = offsetof(struct slimbus_power_req_msg_v01,
 295                                        pm_req),
 296                 .ei_array   = NULL,
 297         },
 298         {
 299                 .data_type  = QMI_OPT_FLAG,
 300                 .elem_len   = 1,
 301                 .elem_size  = sizeof(uint8_t),
 302                 .array_type = NO_ARRAY,
 303                 .tlv_type   = 0x10,
 304                 .offset     = offsetof(struct slimbus_power_req_msg_v01,
 305                                        resp_type_valid),
 306         },
 307         {
 308                 .data_type  = QMI_SIGNED_4_BYTE_ENUM,
 309                 .elem_len   = 1,
 310                 .elem_size  = sizeof(enum slimbus_resp_enum_type_v01),
 311                 .array_type = NO_ARRAY,
 312                 .tlv_type   = 0x10,
 313                 .offset     = offsetof(struct slimbus_power_req_msg_v01,
 314                                        resp_type),
 315         },
 316         {
 317                 .data_type  = QMI_EOTI,
 318                 .elem_len   = 0,
 319                 .elem_size  = 0,
 320                 .array_type = NO_ARRAY,
 321                 .tlv_type   = 0x00,
 322                 .offset     = 0,
 323                 .ei_array   = NULL,
 324         },
 325 };
 326
 327 static struct qmi_elem_info slimbus_power_resp_msg_v01_ei[] = {
 328         {
 329                 .data_type  = QMI_STRUCT,
 330                 .elem_len   = 1,
 331                 .elem_size  = sizeof(struct qmi_response_type_v01),
 332                 .array_type = NO_ARRAY,
 333                 .tlv_type   = 0x02,
 334                 .offset     = offsetof(struct slimbus_power_resp_msg_v01, resp),
 335                 .ei_array   = qmi_response_type_v01_ei,
 336         },
 337         {
 338                 .data_type  = QMI_EOTI,
 339                 .elem_len   = 0,
 340                 .elem_size  = 0,
 341                 .array_type = NO_ARRAY,
 342                 .tlv_type   = 0x00,
 343                 .offset     = 0,
 344                 .ei_array   = NULL,
 345         },
 346 };
 347
 348 static int qcom_slim_qmi_send_select_inst_req(struct qcom_slim_ngd_ctrl *ctrl,
 349                                 struct slimbus_select_inst_req_msg_v01 *req)
 350 {
 351         struct slimbus_select_inst_resp_msg_v01 resp = { { 0, 0 } };
 352         struct qmi_txn txn;
 353         int rc;
 354
 355         rc = qmi_txn_init(ctrl->qmi.handle, &txn,
 356                                 slimbus_select_inst_resp_msg_v01_ei, &resp);
 357         if (rc < 0) {
 358                 dev_err(ctrl->dev, "QMI TXN init fail: %d\n", rc);
 359                 return rc;
 360         }
 361
 362         rc = qmi_send_request(ctrl->qmi.handle, NULL, &txn,
 363                                 SLIMBUS_QMI_SELECT_INSTANCE_REQ_V01,
 364                                 SLIMBUS_QMI_SELECT_INSTANCE_REQ_MAX_MSG_LEN,
 365                                 slimbus_select_inst_req_msg_v01_ei, req);
 366         if (rc < 0) {
 367                 dev_err(ctrl->dev, "QMI send req fail %d\n", rc);
 368                 qmi_txn_cancel(&txn);
 369                 return rc;
 370         }
 371
 372         rc = qmi_txn_wait(&txn, SLIMBUS_QMI_RESP_TOUT);
 373         if (rc < 0) {
 374                 dev_err(ctrl->dev, "QMI TXN wait fail: %d\n", rc);
 375                 return rc;
 376         }
 377         /* Check the response */
 378         if (resp.resp.result != QMI_RESULT_SUCCESS_V01) {
 379                 dev_err(ctrl->dev, "QMI request failed 0x%x\n",
 380                         resp.resp.result);
 381                 return -EREMOTEIO;
 382         }
 383
 384         return 0;
 385 }
 386
 387 static void qcom_slim_qmi_power_resp_cb(struct qmi_handle *handle,
 388                                         struct sockaddr_qrtr *sq,
 389                                         struct qmi_txn *txn, const void *data)
 390 {
 391         struct slimbus_power_resp_msg_v01 *resp;
 392
 393         resp = (struct slimbus_power_resp_msg_v01 *)data;
 394         if (resp->resp.result != QMI_RESULT_SUCCESS_V01)
 395                 pr_err("QMI power request failed 0x%x\n",
 396                                 resp->resp.result);
 397
 398         complete(&txn->completion);
 399 }
 400
 401 static int qcom_slim_qmi_send_power_request(struct qcom_slim_ngd_ctrl *ctrl,
 402                                         struct slimbus_power_req_msg_v01 *req)
 403 {
 404         struct slimbus_power_resp_msg_v01 resp = { { 0, 0 } };
 405         struct qmi_txn txn;
 406         int rc;
 407
 408         rc = qmi_txn_init(ctrl->qmi.handle, &txn,
 409                                 slimbus_power_resp_msg_v01_ei, &resp);
 410
 411         rc = qmi_send_request(ctrl->qmi.handle, NULL, &txn,
 412                                 SLIMBUS_QMI_POWER_REQ_V01,
 413                                 SLIMBUS_QMI_POWER_REQ_MAX_MSG_LEN,
 414                                 slimbus_power_req_msg_v01_ei, req);
 415         if (rc < 0) {
 416                 dev_err(ctrl->dev, "QMI send req fail %d\n", rc);
 417                 qmi_txn_cancel(&txn);
 418                 return rc;
 419         }
 420
 421         rc = qmi_txn_wait(&txn, SLIMBUS_QMI_RESP_TOUT);
 422         if (rc < 0) {
 423                 dev_err(ctrl->dev, "QMI TXN wait fail: %d\n", rc);
 424                 return rc;
 425         }
 426
 427         /* Check the response */
 428         if (resp.resp.result != QMI_RESULT_SUCCESS_V01) {
 429                 dev_err(ctrl->dev, "QMI request failed 0x%x\n",
 430                         resp.resp.result);
 431                 return -EREMOTEIO;
 432         }
 433
 434         return 0;
 435 }
 436
 437 static const struct qmi_msg_handler qcom_slim_qmi_msg_handlers[] = {
 438         {
 439                 .type = QMI_RESPONSE,
 440                 .msg_id = SLIMBUS_QMI_POWER_RESP_V01,
 441                 .ei = slimbus_power_resp_msg_v01_ei,
 442                 .decoded_size = sizeof(struct slimbus_power_resp_msg_v01),
 443                 .fn = qcom_slim_qmi_power_resp_cb,
 444         },
 445         {}
 446 };
 447
 448 static int qcom_slim_qmi_init(struct qcom_slim_ngd_ctrl *ctrl,
 449                               bool apps_is_master)
 450 {
 451         struct slimbus_select_inst_req_msg_v01 req;
 452         struct qmi_handle *handle;
 453         int rc;
 454
 455         handle = devm_kzalloc(ctrl->dev, sizeof(*handle), GFP_KERNEL);
 456         if (!handle)
 457                 return -ENOMEM;
 458
 459         rc = qmi_handle_init(handle, SLIMBUS_QMI_POWER_REQ_MAX_MSG_LEN,
 460                                 NULL, qcom_slim_qmi_msg_handlers);
 461         if (rc < 0) {
 462                 dev_err(ctrl->dev, "QMI client init failed: %d\n", rc);
 463                 goto qmi_handle_init_failed;
 464         }
 465
 466         rc = kernel_connect(handle->sock,
 467                                 (struct sockaddr *)&ctrl->qmi.svc_info,
 468                                 sizeof(ctrl->qmi.svc_info), 0);
 469         if (rc < 0) {
 470                 dev_err(ctrl->dev, "Remote Service connect failed: %d\n", rc);
 471                 goto qmi_connect_to_service_failed;
 472         }
 473
 474         /* Instance is 0 based */
 475         req.instance = (ctrl->ngd->id >> 1);
 476         req.mode_valid = 1;
 477
 478         /* Mode indicates the role of the ADSP */
 479         if (apps_is_master)
 480                 req.mode = SLIMBUS_MODE_SATELLITE_V01;
 481         else
 482                 req.mode = SLIMBUS_MODE_MASTER_V01;
 483
 484         ctrl->qmi.handle = handle;
 485
 486         rc = qcom_slim_qmi_send_select_inst_req(ctrl, &req);
 487         if (rc) {
 488                 dev_err(ctrl->dev, "failed to select h/w instance\n");
 489                 goto qmi_select_instance_failed;
 490         }
 491
 492         return 0;
 493
 494 qmi_select_instance_failed:
 495         ctrl->qmi.handle = NULL;
 496 qmi_connect_to_service_failed:
 497         qmi_handle_release(handle);
 498 qmi_handle_init_failed:
 499         devm_kfree(ctrl->dev, handle);
 500         return rc;
 501 }
 502
 503 static void qcom_slim_qmi_exit(struct qcom_slim_ngd_ctrl *ctrl)
 504 {
 505         if (!ctrl->qmi.handle)
 506                 return;
 507
 508         qmi_handle_release(ctrl->qmi.handle);
 509         devm_kfree(ctrl->dev, ctrl->qmi.handle);
 510         ctrl->qmi.handle = NULL;
 511 }
 512
 513 static int qcom_slim_qmi_power_request(struct qcom_slim_ngd_ctrl *ctrl,
 514                                        bool active)
 515 {
 516         struct slimbus_power_req_msg_v01 req;
 517
 518         if (active)
 519                 req.pm_req = SLIMBUS_PM_ACTIVE_V01;
 520         else
 521                 req.pm_req = SLIMBUS_PM_INACTIVE_V01;
 522
 523         req.resp_type_valid = 0;
 524
 525         return qcom_slim_qmi_send_power_request(ctrl, &req);
 526 }
 527
 528 static u32 *qcom_slim_ngd_tx_msg_get(struct qcom_slim_ngd_ctrl *ctrl, int len,
 529                                      struct completion *comp)
 530 {
 531         struct qcom_slim_ngd_dma_desc *desc;
 532         unsigned long flags;
 533
 534         spin_lock_irqsave(&ctrl->tx_buf_lock, flags);
 535
 536         if ((ctrl->tx_tail + 1) % QCOM_SLIM_NGD_DESC_NUM == ctrl->tx_head) {
 537                 spin_unlock_irqrestore(&ctrl->tx_buf_lock, flags);
 538                 return NULL;
 539         }
 540         desc  = &ctrl->txdesc[ctrl->tx_tail];
 541         desc->base = ctrl->tx_base + ctrl->tx_tail * SLIM_MSGQ_BUF_LEN;
 542         desc->comp = comp;
 543         ctrl->tx_tail = (ctrl->tx_tail + 1) % QCOM_SLIM_NGD_DESC_NUM;
 544
 545         spin_unlock_irqrestore(&ctrl->tx_buf_lock, flags);
 546
 547         return desc->base;
 548 }
 549
 550 static void qcom_slim_ngd_tx_msg_dma_cb(void *args)
 551 {
 552         struct qcom_slim_ngd_dma_desc *desc = args;
 553         struct qcom_slim_ngd_ctrl *ctrl = desc->ctrl;
 554         unsigned long flags;
 555
 556         spin_lock_irqsave(&ctrl->tx_buf_lock, flags);
 557
 558         if (desc->comp) {
 559                 complete(desc->comp);
 560                 desc->comp = NULL;
 561         }
 562
 563         ctrl->tx_head = (ctrl->tx_head + 1) % QCOM_SLIM_NGD_DESC_NUM;
 564         spin_unlock_irqrestore(&ctrl->tx_buf_lock, flags);
 565 }
 566
 567 static int qcom_slim_ngd_tx_msg_post(struct qcom_slim_ngd_ctrl *ctrl,
 568                                      void *buf, int len)
 569 {
 570         struct qcom_slim_ngd_dma_desc *desc;
 571         unsigned long flags;
 572         int index, offset;
 573
 574         spin_lock_irqsave(&ctrl->tx_buf_lock, flags);
 575         offset = buf - ctrl->tx_base;
 576         index = offset/SLIM_MSGQ_BUF_LEN;
 577
 578         desc = &ctrl->txdesc[index];
 579         desc->phys = ctrl->tx_phys_base + offset;
 580         desc->base = ctrl->tx_base + offset;
 581         desc->ctrl = ctrl;
 582         len = (len + 3) & 0xfc;
 583
 584         desc->desc = dmaengine_prep_slave_single(ctrl->dma_tx_channel,
 585                                                 desc->phys, len,
 586                                                 DMA_MEM_TO_DEV,
 587                                                 DMA_PREP_INTERRUPT);
 588         if (!desc->desc) {
 589                 dev_err(ctrl->dev, "unable to prepare channel\n");
 590                 spin_unlock_irqrestore(&ctrl->tx_buf_lock, flags);
 591                 return -EINVAL;
 592         }
 593
 594         desc->desc->callback = qcom_slim_ngd_tx_msg_dma_cb;
 595         desc->desc->callback_param = desc;
 596         desc->desc->cookie = dmaengine_submit(desc->desc);
 597         dma_async_issue_pending(ctrl->dma_tx_channel);
 598         spin_unlock_irqrestore(&ctrl->tx_buf_lock, flags);
 599
 600         return 0;
 601 }
 602
 603 static void qcom_slim_ngd_rx(struct qcom_slim_ngd_ctrl *ctrl, u8 *buf)
 604 {
 605         u8 mc, mt, len;
 606
 607         mt = SLIM_HEADER_GET_MT(buf[0]);
 608         len = SLIM_HEADER_GET_RL(buf[0]);
 609         mc = SLIM_HEADER_GET_MC(buf[1]);
 610
 611         if (mc == SLIM_USR_MC_MASTER_CAPABILITY &&
 612                 mt == SLIM_MSG_MT_SRC_REFERRED_USER)
 613                 queue_work(ctrl->mwq, &ctrl->m_work);
 614
 615         if (mc == SLIM_MSG_MC_REPLY_INFORMATION ||
 616             mc == SLIM_MSG_MC_REPLY_VALUE || (mc == SLIM_USR_MC_ADDR_REPLY &&
 617             mt == SLIM_MSG_MT_SRC_REFERRED_USER) ||
 618                 (mc == SLIM_USR_MC_GENERIC_ACK &&
 619                  mt == SLIM_MSG_MT_SRC_REFERRED_USER)) {
 620                 slim_msg_response(&ctrl->ctrl, &buf[4], buf[3], len - 4);
 621                 pm_runtime_mark_last_busy(ctrl->ctrl.dev);
 622         }
 623 }
 624
 625 static void qcom_slim_ngd_rx_msgq_cb(void *args)
 626 {
 627         struct qcom_slim_ngd_dma_desc *desc = args;
 628         struct qcom_slim_ngd_ctrl *ctrl = desc->ctrl;
 629
 630         qcom_slim_ngd_rx(ctrl, (u8 *)desc->base);
 631         /* Add descriptor back to the queue */
 632         desc->desc = dmaengine_prep_slave_single(ctrl->dma_rx_channel,
 633                                         desc->phys, SLIM_MSGQ_BUF_LEN,
 634                                         DMA_DEV_TO_MEM,
 635                                         DMA_PREP_INTERRUPT);
 636         if (!desc->desc) {
 637                 dev_err(ctrl->dev, "Unable to prepare rx channel\n");
 638                 return;
 639         }
 640
 641         desc->desc->callback = qcom_slim_ngd_rx_msgq_cb;
 642         desc->desc->callback_param = desc;
 643         desc->desc->cookie = dmaengine_submit(desc->desc);
 644         dma_async_issue_pending(ctrl->dma_rx_channel);
 645 }
 646
 647 static int qcom_slim_ngd_post_rx_msgq(struct qcom_slim_ngd_ctrl *ctrl)
 648 {
 649         struct qcom_slim_ngd_dma_desc *desc;
 650         int i;
 651
 652         for (i = 0; i < QCOM_SLIM_NGD_DESC_NUM; i++) {
 653                 desc = &ctrl->rx_desc[i];
 654                 desc->phys = ctrl->rx_phys_base + i * SLIM_MSGQ_BUF_LEN;
 655                 desc->ctrl = ctrl;
 656                 desc->base = ctrl->rx_base + i * SLIM_MSGQ_BUF_LEN;
 657                 desc->desc = dmaengine_prep_slave_single(ctrl->dma_rx_channel,
 658                                                 desc->phys, SLIM_MSGQ_BUF_LEN,
 659                                                 DMA_DEV_TO_MEM,
 660                                                 DMA_PREP_INTERRUPT);
 661                 if (!desc->desc) {
 662                         dev_err(ctrl->dev, "Unable to prepare rx channel\n");
 663                         return -EINVAL;
 664                 }
 665
 666                 desc->desc->callback = qcom_slim_ngd_rx_msgq_cb;
 667                 desc->desc->callback_param = desc;
 668                 desc->desc->cookie = dmaengine_submit(desc->desc);
 669         }
 670         dma_async_issue_pending(ctrl->dma_rx_channel);
 671
 672         return 0;
 673 }
 674
 675 static int qcom_slim_ngd_init_rx_msgq(struct qcom_slim_ngd_ctrl *ctrl)
 676 {
 677         struct device *dev = ctrl->dev;
 678         int ret, size;
 679
 680         ctrl->dma_rx_channel = dma_request_chan(dev, "rx");
 681         if (IS_ERR(ctrl->dma_rx_channel)) {
 682                 dev_err(dev, "Failed to request RX dma channel");
 683                 ret = PTR_ERR(ctrl->dma_rx_channel);
 684                 ctrl->dma_rx_channel = NULL;
 685                 return ret;
 686         }
 687
 688         size = QCOM_SLIM_NGD_DESC_NUM * SLIM_MSGQ_BUF_LEN;
 689         ctrl->rx_base = dma_alloc_coherent(dev, size, &ctrl->rx_phys_base,
 690                                            GFP_KERNEL);
 691         if (!ctrl->rx_base) {
 692                 ret = -ENOMEM;
 693                 goto rel_rx;
 694         }
 695
 696         ret = qcom_slim_ngd_post_rx_msgq(ctrl);
 697         if (ret) {
 698                 dev_err(dev, "post_rx_msgq() failed 0x%x\n", ret);
 699                 goto rx_post_err;
 700         }
 701
 702         return 0;
 703
 704 rx_post_err:
 705         dma_free_coherent(dev, size, ctrl->rx_base, ctrl->rx_phys_base);
 706 rel_rx:
 707         dma_release_channel(ctrl->dma_rx_channel);
 708         return ret;
 709 }
 710
 711 static int qcom_slim_ngd_init_tx_msgq(struct qcom_slim_ngd_ctrl *ctrl)
 712 {
 713         struct device *dev = ctrl->dev;
 714         unsigned long flags;
 715         int ret = 0;
 716         int size;
 717
 718         ctrl->dma_tx_channel = dma_request_chan(dev, "tx");
 719         if (IS_ERR(ctrl->dma_tx_channel)) {
 720                 dev_err(dev, "Failed to request TX dma channel");
 721                 ret = PTR_ERR(ctrl->dma_tx_channel);
 722                 ctrl->dma_tx_channel = NULL;
 723                 return ret;
 724         }
 725
 726         size = ((QCOM_SLIM_NGD_DESC_NUM + 1) * SLIM_MSGQ_BUF_LEN);
 727         ctrl->tx_base = dma_alloc_coherent(dev, size, &ctrl->tx_phys_base,
 728                                            GFP_KERNEL);
 729         if (!ctrl->tx_base) {
 730                 ret = -EINVAL;
 731                 goto rel_tx;
 732         }
 733
 734         spin_lock_irqsave(&ctrl->tx_buf_lock, flags);
 735         ctrl->tx_tail = 0;
 736         ctrl->tx_head = 0;
 737         spin_unlock_irqrestore(&ctrl->tx_buf_lock, flags);
 738
 739         return 0;
 740 rel_tx:
 741         dma_release_channel(ctrl->dma_tx_channel);
 742         return ret;
 743 }
 744
 745 static int qcom_slim_ngd_init_dma(struct qcom_slim_ngd_ctrl *ctrl)
 746 {
 747         int ret = 0;
 748
 749         ret = qcom_slim_ngd_init_rx_msgq(ctrl);
 750         if (ret) {
 751                 dev_err(ctrl->dev, "rx dma init failed\n");
 752                 return ret;
 753         }
 754
 755         ret = qcom_slim_ngd_init_tx_msgq(ctrl);
 756         if (ret)
 757                 dev_err(ctrl->dev, "tx dma init failed\n");
 758
 759         return ret;
 760 }
 761
 762 static irqreturn_t qcom_slim_ngd_interrupt(int irq, void *d)
 763 {
 764         struct qcom_slim_ngd_ctrl *ctrl = d;
 765         void __iomem *base = ctrl->ngd->base;
 766         u32 stat;
 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
 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
 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
 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
 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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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 }
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
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
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
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
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
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
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");