1 // SPDX-License-Identifier: (GPL-2.0-only OR BSD-3-Clause) 2 // 3 // Copyright 2021-2022 NXP 4 // 5 // Author: Peng Zhang <peng.zhang_8@nxp.com> 6 // 7 // Hardware interface for audio DSP on i.MX8ULP 8 9 #include <linux/arm-smccc.h> 10 #include <linux/clk.h> 11 #include <linux/firmware.h> 12 #include <linux/firmware/imx/dsp.h> 13 #include <linux/firmware/imx/ipc.h> 14 #include <linux/firmware/imx/svc/misc.h> 15 #include <linux/mfd/syscon.h> 16 #include <linux/module.h> 17 #include <linux/of_address.h> 18 #include <linux/of_irq.h> 19 #include <linux/of_platform.h> 20 #include <linux/of_reserved_mem.h> 21 22 #include <sound/sof.h> 23 #include <sound/sof/xtensa.h> 24 25 #include "../ops.h" 26 #include "../sof-of-dev.h" 27 #include "imx-common.h" 28 29 #define FSL_SIP_HIFI_XRDC 0xc200000e 30 31 /* SIM Domain register */ 32 #define SYSCTRL0 0x8 33 #define EXECUTE_BIT BIT(13) 34 #define RESET_BIT BIT(16) 35 #define HIFI4_CLK_BIT BIT(17) 36 #define PB_CLK_BIT BIT(18) 37 #define PLAT_CLK_BIT BIT(19) 38 #define DEBUG_LOGIC_BIT BIT(25) 39 40 #define MBOX_OFFSET 0x800000 41 #define MBOX_SIZE 0x1000 42 43 static struct clk_bulk_data imx8ulp_dsp_clks[] = { 44 { .id = "core" }, 45 { .id = "ipg" }, 46 { .id = "ocram" }, 47 { .id = "mu" }, 48 }; 49 50 struct imx8ulp_priv { 51 struct device *dev; 52 struct snd_sof_dev *sdev; 53 54 /* DSP IPC handler */ 55 struct imx_dsp_ipc *dsp_ipc; 56 struct platform_device *ipc_dev; 57 58 struct regmap *regmap; 59 struct imx_clocks *clks; 60 }; 61 62 static void imx8ulp_sim_lpav_start(struct imx8ulp_priv *priv) 63 { 64 /* Controls the HiFi4 DSP Reset: 1 in reset, 0 out of reset */ 65 regmap_update_bits(priv->regmap, SYSCTRL0, RESET_BIT, 0); 66 67 /* Reset HiFi4 DSP Debug logic: 1 debug reset, 0 out of reset*/ 68 regmap_update_bits(priv->regmap, SYSCTRL0, DEBUG_LOGIC_BIT, 0); 69 70 /* Stall HIFI4 DSP Execution: 1 stall, 0 run */ 71 regmap_update_bits(priv->regmap, SYSCTRL0, EXECUTE_BIT, 0); 72 } 73 74 static int imx8ulp_get_mailbox_offset(struct snd_sof_dev *sdev) 75 { 76 return MBOX_OFFSET; 77 } 78 79 static int imx8ulp_get_window_offset(struct snd_sof_dev *sdev, u32 id) 80 { 81 return MBOX_OFFSET; 82 } 83 84 static void imx8ulp_dsp_handle_reply(struct imx_dsp_ipc *ipc) 85 { 86 struct imx8ulp_priv *priv = imx_dsp_get_data(ipc); 87 unsigned long flags; 88 89 spin_lock_irqsave(&priv->sdev->ipc_lock, flags); 90 91 snd_sof_ipc_process_reply(priv->sdev, 0); 92 93 spin_unlock_irqrestore(&priv->sdev->ipc_lock, flags); 94 } 95 96 static void imx8ulp_dsp_handle_request(struct imx_dsp_ipc *ipc) 97 { 98 struct imx8ulp_priv *priv = imx_dsp_get_data(ipc); 99 u32 p; /* panic code */ 100 101 /* Read the message from the debug box. */ 102 sof_mailbox_read(priv->sdev, priv->sdev->debug_box.offset + 4, &p, sizeof(p)); 103 104 /* Check to see if the message is a panic code (0x0dead***) */ 105 if ((p & SOF_IPC_PANIC_MAGIC_MASK) == SOF_IPC_PANIC_MAGIC) 106 snd_sof_dsp_panic(priv->sdev, p, true); 107 else 108 snd_sof_ipc_msgs_rx(priv->sdev); 109 } 110 111 static struct imx_dsp_ops dsp_ops = { 112 .handle_reply = imx8ulp_dsp_handle_reply, 113 .handle_request = imx8ulp_dsp_handle_request, 114 }; 115 116 static int imx8ulp_send_msg(struct snd_sof_dev *sdev, struct snd_sof_ipc_msg *msg) 117 { 118 struct imx8ulp_priv *priv = sdev->pdata->hw_pdata; 119 120 sof_mailbox_write(sdev, sdev->host_box.offset, msg->msg_data, 121 msg->msg_size); 122 imx_dsp_ring_doorbell(priv->dsp_ipc, 0); 123 124 return 0; 125 } 126 127 static int imx8ulp_run(struct snd_sof_dev *sdev) 128 { 129 struct imx8ulp_priv *priv = sdev->pdata->hw_pdata; 130 131 imx8ulp_sim_lpav_start(priv); 132 133 return 0; 134 } 135 136 static int imx8ulp_reset(struct snd_sof_dev *sdev) 137 { 138 struct imx8ulp_priv *priv = sdev->pdata->hw_pdata; 139 struct arm_smccc_res smc_resource; 140 141 /* HiFi4 Platform Clock Enable: 1 enabled, 0 disabled */ 142 regmap_update_bits(priv->regmap, SYSCTRL0, PLAT_CLK_BIT, PLAT_CLK_BIT); 143 144 /* HiFi4 PBCLK clock enable: 1 enabled, 0 disabled */ 145 regmap_update_bits(priv->regmap, SYSCTRL0, PB_CLK_BIT, PB_CLK_BIT); 146 147 /* HiFi4 Clock Enable: 1 enabled, 0 disabled */ 148 regmap_update_bits(priv->regmap, SYSCTRL0, HIFI4_CLK_BIT, HIFI4_CLK_BIT); 149 150 regmap_update_bits(priv->regmap, SYSCTRL0, RESET_BIT, RESET_BIT); 151 usleep_range(1, 2); 152 153 /* Stall HIFI4 DSP Execution: 1 stall, 0 not stall */ 154 regmap_update_bits(priv->regmap, SYSCTRL0, EXECUTE_BIT, EXECUTE_BIT); 155 usleep_range(1, 2); 156 157 arm_smccc_smc(FSL_SIP_HIFI_XRDC, 0, 0, 0, 0, 0, 0, 0, &smc_resource); 158 159 return 0; 160 } 161 162 static int imx8ulp_probe(struct snd_sof_dev *sdev) 163 { 164 struct platform_device *pdev = 165 container_of(sdev->dev, struct platform_device, dev); 166 struct device_node *np = pdev->dev.of_node; 167 struct device_node *res_node; 168 struct resource *mmio; 169 struct imx8ulp_priv *priv; 170 struct resource res; 171 u32 base, size; 172 int ret = 0; 173 174 priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL); 175 if (!priv) 176 return -ENOMEM; 177 178 priv->clks = devm_kzalloc(&pdev->dev, sizeof(*priv->clks), GFP_KERNEL); 179 if (!priv->clks) 180 return -ENOMEM; 181 182 sdev->num_cores = 1; 183 sdev->pdata->hw_pdata = priv; 184 priv->dev = sdev->dev; 185 priv->sdev = sdev; 186 187 /* System integration module(SIM) control dsp configuration */ 188 priv->regmap = syscon_regmap_lookup_by_phandle(np, "fsl,dsp-ctrl"); 189 if (IS_ERR(priv->regmap)) 190 return PTR_ERR(priv->regmap); 191 192 priv->ipc_dev = platform_device_register_data(sdev->dev, "imx-dsp", 193 PLATFORM_DEVID_NONE, 194 pdev, sizeof(*pdev)); 195 if (IS_ERR(priv->ipc_dev)) 196 return PTR_ERR(priv->ipc_dev); 197 198 priv->dsp_ipc = dev_get_drvdata(&priv->ipc_dev->dev); 199 if (!priv->dsp_ipc) { 200 /* DSP IPC driver not probed yet, try later */ 201 ret = -EPROBE_DEFER; 202 dev_err(sdev->dev, "Failed to get drvdata\n"); 203 goto exit_pdev_unregister; 204 } 205 206 imx_dsp_set_data(priv->dsp_ipc, priv); 207 priv->dsp_ipc->ops = &dsp_ops; 208 209 /* DSP base */ 210 mmio = platform_get_resource(pdev, IORESOURCE_MEM, 0); 211 if (mmio) { 212 base = mmio->start; 213 size = resource_size(mmio); 214 } else { 215 dev_err(sdev->dev, "error: failed to get DSP base at idx 0\n"); 216 ret = -EINVAL; 217 goto exit_pdev_unregister; 218 } 219 220 sdev->bar[SOF_FW_BLK_TYPE_IRAM] = devm_ioremap(sdev->dev, base, size); 221 if (!sdev->bar[SOF_FW_BLK_TYPE_IRAM]) { 222 dev_err(sdev->dev, "failed to ioremap base 0x%x size 0x%x\n", 223 base, size); 224 ret = -ENODEV; 225 goto exit_pdev_unregister; 226 } 227 sdev->mmio_bar = SOF_FW_BLK_TYPE_IRAM; 228 229 res_node = of_parse_phandle(np, "memory-reserved", 0); 230 if (!res_node) { 231 dev_err(&pdev->dev, "failed to get memory region node\n"); 232 ret = -ENODEV; 233 goto exit_pdev_unregister; 234 } 235 236 ret = of_address_to_resource(res_node, 0, &res); 237 of_node_put(res_node); 238 if (ret) { 239 dev_err(&pdev->dev, "failed to get reserved region address\n"); 240 goto exit_pdev_unregister; 241 } 242 243 sdev->bar[SOF_FW_BLK_TYPE_SRAM] = devm_ioremap_wc(sdev->dev, res.start, 244 resource_size(&res)); 245 if (!sdev->bar[SOF_FW_BLK_TYPE_SRAM]) { 246 dev_err(sdev->dev, "failed to ioremap mem 0x%x size 0x%x\n", 247 base, size); 248 ret = -ENOMEM; 249 goto exit_pdev_unregister; 250 } 251 sdev->mailbox_bar = SOF_FW_BLK_TYPE_SRAM; 252 253 /* set default mailbox offset for FW ready message */ 254 sdev->dsp_box.offset = MBOX_OFFSET; 255 256 ret = of_reserved_mem_device_init(sdev->dev); 257 if (ret) { 258 dev_err(&pdev->dev, "failed to init reserved memory region %d\n", ret); 259 goto exit_pdev_unregister; 260 } 261 262 priv->clks->dsp_clks = imx8ulp_dsp_clks; 263 priv->clks->num_dsp_clks = ARRAY_SIZE(imx8ulp_dsp_clks); 264 265 ret = imx8_parse_clocks(sdev, priv->clks); 266 if (ret < 0) 267 goto exit_pdev_unregister; 268 269 ret = imx8_enable_clocks(sdev, priv->clks); 270 if (ret < 0) 271 goto exit_pdev_unregister; 272 273 return 0; 274 275 exit_pdev_unregister: 276 platform_device_unregister(priv->ipc_dev); 277 278 return ret; 279 } 280 281 static int imx8ulp_remove(struct snd_sof_dev *sdev) 282 { 283 struct imx8ulp_priv *priv = sdev->pdata->hw_pdata; 284 285 imx8_disable_clocks(sdev, priv->clks); 286 platform_device_unregister(priv->ipc_dev); 287 288 return 0; 289 } 290 291 /* on i.MX8 there is 1 to 1 match between type and BAR idx */ 292 static int imx8ulp_get_bar_index(struct snd_sof_dev *sdev, u32 type) 293 { 294 return type; 295 } 296 297 static int imx8ulp_suspend(struct snd_sof_dev *sdev) 298 { 299 int i; 300 struct imx8ulp_priv *priv = (struct imx8ulp_priv *)sdev->pdata->hw_pdata; 301 302 /*Stall DSP, release in .run() */ 303 regmap_update_bits(priv->regmap, SYSCTRL0, EXECUTE_BIT, EXECUTE_BIT); 304 305 for (i = 0; i < DSP_MU_CHAN_NUM; i++) 306 imx_dsp_free_channel(priv->dsp_ipc, i); 307 308 imx8_disable_clocks(sdev, priv->clks); 309 310 return 0; 311 } 312 313 static int imx8ulp_resume(struct snd_sof_dev *sdev) 314 { 315 struct imx8ulp_priv *priv = (struct imx8ulp_priv *)sdev->pdata->hw_pdata; 316 int i; 317 318 imx8_enable_clocks(sdev, priv->clks); 319 320 for (i = 0; i < DSP_MU_CHAN_NUM; i++) 321 imx_dsp_request_channel(priv->dsp_ipc, i); 322 323 return 0; 324 } 325 326 static int imx8ulp_dsp_runtime_resume(struct snd_sof_dev *sdev) 327 { 328 const struct sof_dsp_power_state target_dsp_state = { 329 .state = SOF_DSP_PM_D0, 330 .substate = 0, 331 }; 332 333 imx8ulp_resume(sdev); 334 335 return snd_sof_dsp_set_power_state(sdev, &target_dsp_state); 336 } 337 338 static int imx8ulp_dsp_runtime_suspend(struct snd_sof_dev *sdev) 339 { 340 const struct sof_dsp_power_state target_dsp_state = { 341 .state = SOF_DSP_PM_D3, 342 .substate = 0, 343 }; 344 345 imx8ulp_suspend(sdev); 346 347 return snd_sof_dsp_set_power_state(sdev, &target_dsp_state); 348 } 349 350 static int imx8ulp_dsp_suspend(struct snd_sof_dev *sdev, unsigned int target_state) 351 { 352 const struct sof_dsp_power_state target_dsp_state = { 353 .state = target_state, 354 .substate = 0, 355 }; 356 357 if (!pm_runtime_suspended(sdev->dev)) 358 imx8ulp_suspend(sdev); 359 360 return snd_sof_dsp_set_power_state(sdev, &target_dsp_state); 361 } 362 363 static int imx8ulp_dsp_resume(struct snd_sof_dev *sdev) 364 { 365 const struct sof_dsp_power_state target_dsp_state = { 366 .state = SOF_DSP_PM_D0, 367 .substate = 0, 368 }; 369 370 imx8ulp_resume(sdev); 371 372 if (pm_runtime_suspended(sdev->dev)) { 373 pm_runtime_disable(sdev->dev); 374 pm_runtime_set_active(sdev->dev); 375 pm_runtime_mark_last_busy(sdev->dev); 376 pm_runtime_enable(sdev->dev); 377 pm_runtime_idle(sdev->dev); 378 } 379 380 return snd_sof_dsp_set_power_state(sdev, &target_dsp_state); 381 } 382 383 static struct snd_soc_dai_driver imx8ulp_dai[] = { 384 { 385 .name = "sai5", 386 .playback = { 387 .channels_min = 1, 388 .channels_max = 32, 389 }, 390 .capture = { 391 .channels_min = 1, 392 .channels_max = 32, 393 }, 394 }, 395 { 396 .name = "sai6", 397 .playback = { 398 .channels_min = 1, 399 .channels_max = 32, 400 }, 401 .capture = { 402 .channels_min = 1, 403 .channels_max = 32, 404 }, 405 }, 406 }; 407 408 static int imx8ulp_dsp_set_power_state(struct snd_sof_dev *sdev, 409 const struct sof_dsp_power_state *target_state) 410 { 411 sdev->dsp_power_state = *target_state; 412 413 return 0; 414 } 415 416 /* i.MX8 ops */ 417 static struct snd_sof_dsp_ops sof_imx8ulp_ops = { 418 /* probe and remove */ 419 .probe = imx8ulp_probe, 420 .remove = imx8ulp_remove, 421 /* DSP core boot */ 422 .run = imx8ulp_run, 423 .reset = imx8ulp_reset, 424 425 /* Block IO */ 426 .block_read = sof_block_read, 427 .block_write = sof_block_write, 428 429 /* Module IO */ 430 .read64 = sof_io_read64, 431 432 /* Mailbox IO */ 433 .mailbox_read = sof_mailbox_read, 434 .mailbox_write = sof_mailbox_write, 435 436 /* ipc */ 437 .send_msg = imx8ulp_send_msg, 438 .get_mailbox_offset = imx8ulp_get_mailbox_offset, 439 .get_window_offset = imx8ulp_get_window_offset, 440 441 .ipc_msg_data = sof_ipc_msg_data, 442 .set_stream_data_offset = sof_set_stream_data_offset, 443 444 /* stream callbacks */ 445 .pcm_open = sof_stream_pcm_open, 446 .pcm_close = sof_stream_pcm_close, 447 448 /* module loading */ 449 .get_bar_index = imx8ulp_get_bar_index, 450 /* firmware loading */ 451 .load_firmware = snd_sof_load_firmware_memcpy, 452 453 /* Debug information */ 454 .dbg_dump = imx8_dump, 455 456 /* Firmware ops */ 457 .dsp_arch_ops = &sof_xtensa_arch_ops, 458 459 /* DAI drivers */ 460 .drv = imx8ulp_dai, 461 .num_drv = ARRAY_SIZE(imx8ulp_dai), 462 463 /* ALSA HW info flags */ 464 .hw_info = SNDRV_PCM_INFO_MMAP | 465 SNDRV_PCM_INFO_MMAP_VALID | 466 SNDRV_PCM_INFO_INTERLEAVED | 467 SNDRV_PCM_INFO_PAUSE | 468 SNDRV_PCM_INFO_NO_PERIOD_WAKEUP, 469 470 /* PM */ 471 .runtime_suspend = imx8ulp_dsp_runtime_suspend, 472 .runtime_resume = imx8ulp_dsp_runtime_resume, 473 474 .suspend = imx8ulp_dsp_suspend, 475 .resume = imx8ulp_dsp_resume, 476 477 .set_power_state = imx8ulp_dsp_set_power_state, 478 }; 479 480 static struct sof_dev_desc sof_of_imx8ulp_desc = { 481 .ipc_supported_mask = BIT(SOF_IPC), 482 .ipc_default = SOF_IPC, 483 .default_fw_path = { 484 [SOF_IPC] = "imx/sof", 485 }, 486 .default_tplg_path = { 487 [SOF_IPC] = "imx/sof-tplg", 488 }, 489 .default_fw_filename = { 490 [SOF_IPC] = "sof-imx8ulp.ri", 491 }, 492 .nocodec_tplg_filename = "sof-imx8ulp-nocodec.tplg", 493 .ops = &sof_imx8ulp_ops, 494 }; 495 496 static const struct of_device_id sof_of_imx8ulp_ids[] = { 497 { .compatible = "fsl,imx8ulp-dsp", .data = &sof_of_imx8ulp_desc}, 498 { } 499 }; 500 MODULE_DEVICE_TABLE(of, sof_of_imx8ulp_ids); 501 502 /* DT driver definition */ 503 static struct platform_driver snd_sof_of_imx8ulp_driver = { 504 .probe = sof_of_probe, 505 .remove = sof_of_remove, 506 .driver = { 507 .name = "sof-audio-of-imx8ulp", 508 .pm = &sof_of_pm, 509 .of_match_table = sof_of_imx8ulp_ids, 510 }, 511 }; 512 module_platform_driver(snd_sof_of_imx8ulp_driver); 513 514 MODULE_IMPORT_NS(SND_SOC_SOF_XTENSA); 515 MODULE_LICENSE("Dual BSD/GPL"); 516