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 struct imx8ulp_priv {
44 struct device *dev;
45 struct snd_sof_dev *sdev;
46
47 /* DSP IPC handler */
48 struct imx_dsp_ipc *dsp_ipc;
49 struct platform_device *ipc_dev;
50
51 struct regmap *regmap;
52 struct clk_bulk_data *clks;
53 int clk_num;
54 };
55
imx8ulp_sim_lpav_start(struct imx8ulp_priv * priv)56 static void imx8ulp_sim_lpav_start(struct imx8ulp_priv *priv)
57 {
58 /* Controls the HiFi4 DSP Reset: 1 in reset, 0 out of reset */
59 regmap_update_bits(priv->regmap, SYSCTRL0, RESET_BIT, 0);
60
61 /* Reset HiFi4 DSP Debug logic: 1 debug reset, 0 out of reset*/
62 regmap_update_bits(priv->regmap, SYSCTRL0, DEBUG_LOGIC_BIT, 0);
63
64 /* Stall HIFI4 DSP Execution: 1 stall, 0 run */
65 regmap_update_bits(priv->regmap, SYSCTRL0, EXECUTE_BIT, 0);
66 }
67
imx8ulp_get_mailbox_offset(struct snd_sof_dev * sdev)68 static int imx8ulp_get_mailbox_offset(struct snd_sof_dev *sdev)
69 {
70 return MBOX_OFFSET;
71 }
72
imx8ulp_get_window_offset(struct snd_sof_dev * sdev,u32 id)73 static int imx8ulp_get_window_offset(struct snd_sof_dev *sdev, u32 id)
74 {
75 return MBOX_OFFSET;
76 }
77
imx8ulp_dsp_handle_reply(struct imx_dsp_ipc * ipc)78 static void imx8ulp_dsp_handle_reply(struct imx_dsp_ipc *ipc)
79 {
80 struct imx8ulp_priv *priv = imx_dsp_get_data(ipc);
81 unsigned long flags;
82
83 spin_lock_irqsave(&priv->sdev->ipc_lock, flags);
84
85 snd_sof_ipc_process_reply(priv->sdev, 0);
86
87 spin_unlock_irqrestore(&priv->sdev->ipc_lock, flags);
88 }
89
imx8ulp_dsp_handle_request(struct imx_dsp_ipc * ipc)90 static void imx8ulp_dsp_handle_request(struct imx_dsp_ipc *ipc)
91 {
92 struct imx8ulp_priv *priv = imx_dsp_get_data(ipc);
93 u32 p; /* panic code */
94
95 /* Read the message from the debug box. */
96 sof_mailbox_read(priv->sdev, priv->sdev->debug_box.offset + 4, &p, sizeof(p));
97
98 /* Check to see if the message is a panic code (0x0dead***) */
99 if ((p & SOF_IPC_PANIC_MAGIC_MASK) == SOF_IPC_PANIC_MAGIC)
100 snd_sof_dsp_panic(priv->sdev, p, true);
101 else
102 snd_sof_ipc_msgs_rx(priv->sdev);
103 }
104
105 static struct imx_dsp_ops dsp_ops = {
106 .handle_reply = imx8ulp_dsp_handle_reply,
107 .handle_request = imx8ulp_dsp_handle_request,
108 };
109
imx8ulp_send_msg(struct snd_sof_dev * sdev,struct snd_sof_ipc_msg * msg)110 static int imx8ulp_send_msg(struct snd_sof_dev *sdev, struct snd_sof_ipc_msg *msg)
111 {
112 struct imx8ulp_priv *priv = sdev->pdata->hw_pdata;
113
114 sof_mailbox_write(sdev, sdev->host_box.offset, msg->msg_data,
115 msg->msg_size);
116 imx_dsp_ring_doorbell(priv->dsp_ipc, 0);
117
118 return 0;
119 }
120
imx8ulp_run(struct snd_sof_dev * sdev)121 static int imx8ulp_run(struct snd_sof_dev *sdev)
122 {
123 struct imx8ulp_priv *priv = sdev->pdata->hw_pdata;
124
125 imx8ulp_sim_lpav_start(priv);
126
127 return 0;
128 }
129
imx8ulp_reset(struct snd_sof_dev * sdev)130 static int imx8ulp_reset(struct snd_sof_dev *sdev)
131 {
132 struct imx8ulp_priv *priv = sdev->pdata->hw_pdata;
133 struct arm_smccc_res smc_resource;
134
135 /* HiFi4 Platform Clock Enable: 1 enabled, 0 disabled */
136 regmap_update_bits(priv->regmap, SYSCTRL0, PLAT_CLK_BIT, PLAT_CLK_BIT);
137
138 /* HiFi4 PBCLK clock enable: 1 enabled, 0 disabled */
139 regmap_update_bits(priv->regmap, SYSCTRL0, PB_CLK_BIT, PB_CLK_BIT);
140
141 /* HiFi4 Clock Enable: 1 enabled, 0 disabled */
142 regmap_update_bits(priv->regmap, SYSCTRL0, HIFI4_CLK_BIT, HIFI4_CLK_BIT);
143
144 regmap_update_bits(priv->regmap, SYSCTRL0, RESET_BIT, RESET_BIT);
145 usleep_range(1, 2);
146
147 /* Stall HIFI4 DSP Execution: 1 stall, 0 not stall */
148 regmap_update_bits(priv->regmap, SYSCTRL0, EXECUTE_BIT, EXECUTE_BIT);
149 usleep_range(1, 2);
150
151 arm_smccc_smc(FSL_SIP_HIFI_XRDC, 0, 0, 0, 0, 0, 0, 0, &smc_resource);
152
153 return 0;
154 }
155
imx8ulp_probe(struct snd_sof_dev * sdev)156 static int imx8ulp_probe(struct snd_sof_dev *sdev)
157 {
158 struct platform_device *pdev =
159 container_of(sdev->dev, struct platform_device, dev);
160 struct device_node *np = pdev->dev.of_node;
161 struct device_node *res_node;
162 struct resource *mmio;
163 struct imx8ulp_priv *priv;
164 struct resource res;
165 u32 base, size;
166 int ret = 0;
167
168 priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
169 if (!priv)
170 return -ENOMEM;
171
172 sdev->num_cores = 1;
173 sdev->pdata->hw_pdata = priv;
174 priv->dev = sdev->dev;
175 priv->sdev = sdev;
176
177 /* System integration module(SIM) control dsp configuration */
178 priv->regmap = syscon_regmap_lookup_by_phandle(np, "fsl,dsp-ctrl");
179 if (IS_ERR(priv->regmap))
180 return PTR_ERR(priv->regmap);
181
182 priv->ipc_dev = platform_device_register_data(sdev->dev, "imx-dsp",
183 PLATFORM_DEVID_NONE,
184 pdev, sizeof(*pdev));
185 if (IS_ERR(priv->ipc_dev))
186 return PTR_ERR(priv->ipc_dev);
187
188 priv->dsp_ipc = dev_get_drvdata(&priv->ipc_dev->dev);
189 if (!priv->dsp_ipc) {
190 /* DSP IPC driver not probed yet, try later */
191 ret = -EPROBE_DEFER;
192 dev_err(sdev->dev, "Failed to get drvdata\n");
193 goto exit_pdev_unregister;
194 }
195
196 imx_dsp_set_data(priv->dsp_ipc, priv);
197 priv->dsp_ipc->ops = &dsp_ops;
198
199 /* DSP base */
200 mmio = platform_get_resource(pdev, IORESOURCE_MEM, 0);
201 if (mmio) {
202 base = mmio->start;
203 size = resource_size(mmio);
204 } else {
205 dev_err(sdev->dev, "error: failed to get DSP base at idx 0\n");
206 ret = -EINVAL;
207 goto exit_pdev_unregister;
208 }
209
210 sdev->bar[SOF_FW_BLK_TYPE_IRAM] = devm_ioremap(sdev->dev, base, size);
211 if (!sdev->bar[SOF_FW_BLK_TYPE_IRAM]) {
212 dev_err(sdev->dev, "failed to ioremap base 0x%x size 0x%x\n",
213 base, size);
214 ret = -ENODEV;
215 goto exit_pdev_unregister;
216 }
217 sdev->mmio_bar = SOF_FW_BLK_TYPE_IRAM;
218
219 res_node = of_parse_phandle(np, "memory-reserved", 0);
220 if (!res_node) {
221 dev_err(&pdev->dev, "failed to get memory region node\n");
222 ret = -ENODEV;
223 goto exit_pdev_unregister;
224 }
225
226 ret = of_address_to_resource(res_node, 0, &res);
227 of_node_put(res_node);
228 if (ret) {
229 dev_err(&pdev->dev, "failed to get reserved region address\n");
230 goto exit_pdev_unregister;
231 }
232
233 sdev->bar[SOF_FW_BLK_TYPE_SRAM] = devm_ioremap_wc(sdev->dev, res.start,
234 resource_size(&res));
235 if (!sdev->bar[SOF_FW_BLK_TYPE_SRAM]) {
236 dev_err(sdev->dev, "failed to ioremap mem 0x%x size 0x%x\n",
237 base, size);
238 ret = -ENOMEM;
239 goto exit_pdev_unregister;
240 }
241 sdev->mailbox_bar = SOF_FW_BLK_TYPE_SRAM;
242
243 /* set default mailbox offset for FW ready message */
244 sdev->dsp_box.offset = MBOX_OFFSET;
245
246 ret = of_reserved_mem_device_init(sdev->dev);
247 if (ret) {
248 dev_err(&pdev->dev, "failed to init reserved memory region %d\n", ret);
249 goto exit_pdev_unregister;
250 }
251
252 ret = devm_clk_bulk_get_all(sdev->dev, &priv->clks);
253 if (ret < 0) {
254 dev_err(sdev->dev, "failed to fetch clocks: %d\n", ret);
255 goto exit_pdev_unregister;
256 }
257 priv->clk_num = ret;
258
259 ret = clk_bulk_prepare_enable(priv->clk_num, priv->clks);
260 if (ret < 0) {
261 dev_err(sdev->dev, "failed to enable clocks: %d\n", ret);
262 goto exit_pdev_unregister;
263 }
264
265 return 0;
266
267 exit_pdev_unregister:
268 platform_device_unregister(priv->ipc_dev);
269
270 return ret;
271 }
272
imx8ulp_remove(struct snd_sof_dev * sdev)273 static void imx8ulp_remove(struct snd_sof_dev *sdev)
274 {
275 struct imx8ulp_priv *priv = sdev->pdata->hw_pdata;
276
277 clk_bulk_disable_unprepare(priv->clk_num, priv->clks);
278 platform_device_unregister(priv->ipc_dev);
279 }
280
281 /* on i.MX8 there is 1 to 1 match between type and BAR idx */
imx8ulp_get_bar_index(struct snd_sof_dev * sdev,u32 type)282 static int imx8ulp_get_bar_index(struct snd_sof_dev *sdev, u32 type)
283 {
284 return type;
285 }
286
imx8ulp_suspend(struct snd_sof_dev * sdev)287 static int imx8ulp_suspend(struct snd_sof_dev *sdev)
288 {
289 int i;
290 struct imx8ulp_priv *priv = (struct imx8ulp_priv *)sdev->pdata->hw_pdata;
291
292 /*Stall DSP, release in .run() */
293 regmap_update_bits(priv->regmap, SYSCTRL0, EXECUTE_BIT, EXECUTE_BIT);
294
295 for (i = 0; i < DSP_MU_CHAN_NUM; i++)
296 imx_dsp_free_channel(priv->dsp_ipc, i);
297
298 clk_bulk_disable_unprepare(priv->clk_num, priv->clks);
299
300 return 0;
301 }
302
imx8ulp_resume(struct snd_sof_dev * sdev)303 static int imx8ulp_resume(struct snd_sof_dev *sdev)
304 {
305 struct imx8ulp_priv *priv = (struct imx8ulp_priv *)sdev->pdata->hw_pdata;
306 int i, ret;
307
308 ret = clk_bulk_prepare_enable(priv->clk_num, priv->clks);
309 if (ret < 0) {
310 dev_err(sdev->dev, "failed to enable clocks: %d\n", ret);
311 return ret;
312 }
313
314 for (i = 0; i < DSP_MU_CHAN_NUM; i++)
315 imx_dsp_request_channel(priv->dsp_ipc, i);
316
317 return 0;
318 }
319
imx8ulp_dsp_runtime_resume(struct snd_sof_dev * sdev)320 static int imx8ulp_dsp_runtime_resume(struct snd_sof_dev *sdev)
321 {
322 const struct sof_dsp_power_state target_dsp_state = {
323 .state = SOF_DSP_PM_D0,
324 .substate = 0,
325 };
326
327 imx8ulp_resume(sdev);
328
329 return snd_sof_dsp_set_power_state(sdev, &target_dsp_state);
330 }
331
imx8ulp_dsp_runtime_suspend(struct snd_sof_dev * sdev)332 static int imx8ulp_dsp_runtime_suspend(struct snd_sof_dev *sdev)
333 {
334 const struct sof_dsp_power_state target_dsp_state = {
335 .state = SOF_DSP_PM_D3,
336 .substate = 0,
337 };
338
339 imx8ulp_suspend(sdev);
340
341 return snd_sof_dsp_set_power_state(sdev, &target_dsp_state);
342 }
343
imx8ulp_dsp_suspend(struct snd_sof_dev * sdev,unsigned int target_state)344 static int imx8ulp_dsp_suspend(struct snd_sof_dev *sdev, unsigned int target_state)
345 {
346 const struct sof_dsp_power_state target_dsp_state = {
347 .state = target_state,
348 .substate = 0,
349 };
350
351 if (!pm_runtime_suspended(sdev->dev))
352 imx8ulp_suspend(sdev);
353
354 return snd_sof_dsp_set_power_state(sdev, &target_dsp_state);
355 }
356
imx8ulp_dsp_resume(struct snd_sof_dev * sdev)357 static int imx8ulp_dsp_resume(struct snd_sof_dev *sdev)
358 {
359 const struct sof_dsp_power_state target_dsp_state = {
360 .state = SOF_DSP_PM_D0,
361 .substate = 0,
362 };
363
364 imx8ulp_resume(sdev);
365
366 if (pm_runtime_suspended(sdev->dev)) {
367 pm_runtime_disable(sdev->dev);
368 pm_runtime_set_active(sdev->dev);
369 pm_runtime_mark_last_busy(sdev->dev);
370 pm_runtime_enable(sdev->dev);
371 pm_runtime_idle(sdev->dev);
372 }
373
374 return snd_sof_dsp_set_power_state(sdev, &target_dsp_state);
375 }
376
377 static struct snd_soc_dai_driver imx8ulp_dai[] = {
378 {
379 .name = "sai5",
380 .playback = {
381 .channels_min = 1,
382 .channels_max = 32,
383 },
384 .capture = {
385 .channels_min = 1,
386 .channels_max = 32,
387 },
388 },
389 {
390 .name = "sai6",
391 .playback = {
392 .channels_min = 1,
393 .channels_max = 32,
394 },
395 .capture = {
396 .channels_min = 1,
397 .channels_max = 32,
398 },
399 },
400 };
401
imx8ulp_dsp_set_power_state(struct snd_sof_dev * sdev,const struct sof_dsp_power_state * target_state)402 static int imx8ulp_dsp_set_power_state(struct snd_sof_dev *sdev,
403 const struct sof_dsp_power_state *target_state)
404 {
405 sdev->dsp_power_state = *target_state;
406
407 return 0;
408 }
409
410 /* i.MX8 ops */
411 static const struct snd_sof_dsp_ops sof_imx8ulp_ops = {
412 /* probe and remove */
413 .probe = imx8ulp_probe,
414 .remove = imx8ulp_remove,
415 /* DSP core boot */
416 .run = imx8ulp_run,
417 .reset = imx8ulp_reset,
418
419 /* Block IO */
420 .block_read = sof_block_read,
421 .block_write = sof_block_write,
422
423 /* Module IO */
424 .read64 = sof_io_read64,
425
426 /* Mailbox IO */
427 .mailbox_read = sof_mailbox_read,
428 .mailbox_write = sof_mailbox_write,
429
430 /* ipc */
431 .send_msg = imx8ulp_send_msg,
432 .get_mailbox_offset = imx8ulp_get_mailbox_offset,
433 .get_window_offset = imx8ulp_get_window_offset,
434
435 .ipc_msg_data = sof_ipc_msg_data,
436 .set_stream_data_offset = sof_set_stream_data_offset,
437
438 /* stream callbacks */
439 .pcm_open = sof_stream_pcm_open,
440 .pcm_close = sof_stream_pcm_close,
441
442 /* module loading */
443 .get_bar_index = imx8ulp_get_bar_index,
444 /* firmware loading */
445 .load_firmware = snd_sof_load_firmware_memcpy,
446
447 /* Debug information */
448 .dbg_dump = imx8_dump,
449
450 /* Firmware ops */
451 .dsp_arch_ops = &sof_xtensa_arch_ops,
452
453 /* DAI drivers */
454 .drv = imx8ulp_dai,
455 .num_drv = ARRAY_SIZE(imx8ulp_dai),
456
457 /* ALSA HW info flags */
458 .hw_info = SNDRV_PCM_INFO_MMAP |
459 SNDRV_PCM_INFO_MMAP_VALID |
460 SNDRV_PCM_INFO_INTERLEAVED |
461 SNDRV_PCM_INFO_PAUSE |
462 SNDRV_PCM_INFO_BATCH |
463 SNDRV_PCM_INFO_NO_PERIOD_WAKEUP,
464
465 /* PM */
466 .runtime_suspend = imx8ulp_dsp_runtime_suspend,
467 .runtime_resume = imx8ulp_dsp_runtime_resume,
468
469 .suspend = imx8ulp_dsp_suspend,
470 .resume = imx8ulp_dsp_resume,
471
472 .set_power_state = imx8ulp_dsp_set_power_state,
473 };
474
475 static struct snd_sof_of_mach sof_imx8ulp_machs[] = {
476 {
477 .compatible = "fsl,imx8ulp-evk",
478 .sof_tplg_filename = "sof-imx8ulp-btsco.tplg",
479 .drv_name = "asoc-audio-graph-card2",
480 },
481 {}
482 };
483
484 static struct sof_dev_desc sof_of_imx8ulp_desc = {
485 .of_machines = sof_imx8ulp_machs,
486 .ipc_supported_mask = BIT(SOF_IPC_TYPE_3),
487 .ipc_default = SOF_IPC_TYPE_3,
488 .default_fw_path = {
489 [SOF_IPC_TYPE_3] = "imx/sof",
490 },
491 .default_tplg_path = {
492 [SOF_IPC_TYPE_3] = "imx/sof-tplg",
493 },
494 .default_fw_filename = {
495 [SOF_IPC_TYPE_3] = "sof-imx8ulp.ri",
496 },
497 .nocodec_tplg_filename = "sof-imx8ulp-nocodec.tplg",
498 .ops = &sof_imx8ulp_ops,
499 };
500
501 static const struct of_device_id sof_of_imx8ulp_ids[] = {
502 { .compatible = "fsl,imx8ulp-dsp", .data = &sof_of_imx8ulp_desc},
503 { }
504 };
505 MODULE_DEVICE_TABLE(of, sof_of_imx8ulp_ids);
506
507 /* DT driver definition */
508 static struct platform_driver snd_sof_of_imx8ulp_driver = {
509 .probe = sof_of_probe,
510 .remove = sof_of_remove,
511 .driver = {
512 .name = "sof-audio-of-imx8ulp",
513 .pm = &sof_of_pm,
514 .of_match_table = sof_of_imx8ulp_ids,
515 },
516 };
517 module_platform_driver(snd_sof_of_imx8ulp_driver);
518
519 MODULE_LICENSE("Dual BSD/GPL");
520 MODULE_DESCRIPTION("SOF support for IMX8ULP platforms");
521 MODULE_IMPORT_NS(SND_SOC_SOF_XTENSA);
522