summaryrefslogtreecommitdiff
path: root/sound/soc/amd/ps/pci-ps.c
blob: e86f23d97584f6fab89e17391c9999f39802f63c (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
// SPDX-License-Identifier: GPL-2.0+
/*
 * AMD Pink Sardine ACP PCI Driver
 *
 * Copyright 2022 Advanced Micro Devices, Inc.
 */

#include <linux/pci.h>
#include <linux/module.h>
#include <linux/io.h>
#include <linux/delay.h>
#include <linux/platform_device.h>
#include <linux/acpi.h>
#include <linux/interrupt.h>
#include <sound/pcm_params.h>
#include <linux/pm_runtime.h>

#include "acp63.h"

static int acp63_power_on(void __iomem *acp_base)
{
	u32 val;
	int timeout;

	val = acp63_readl(acp_base + ACP_PGFSM_STATUS);

	if (!val)
		return val;

	if ((val & ACP_PGFSM_STATUS_MASK) != ACP_POWER_ON_IN_PROGRESS)
		acp63_writel(ACP_PGFSM_CNTL_POWER_ON_MASK, acp_base + ACP_PGFSM_CONTROL);
	timeout = 0;
	while (++timeout < 500) {
		val = acp63_readl(acp_base + ACP_PGFSM_STATUS);
		if (!val)
			return 0;
		udelay(1);
	}
	return -ETIMEDOUT;
}

static int acp63_reset(void __iomem *acp_base)
{
	u32 val;
	int timeout;

	acp63_writel(1, acp_base + ACP_SOFT_RESET);
	timeout = 0;
	while (++timeout < 500) {
		val = acp63_readl(acp_base + ACP_SOFT_RESET);
		if (val & ACP_SOFT_RESET_SOFTRESET_AUDDONE_MASK)
			break;
		cpu_relax();
	}
	acp63_writel(0, acp_base + ACP_SOFT_RESET);
	timeout = 0;
	while (++timeout < 500) {
		val = acp63_readl(acp_base + ACP_SOFT_RESET);
		if (!val)
			return 0;
		cpu_relax();
	}
	return -ETIMEDOUT;
}

static void acp63_enable_interrupts(void __iomem *acp_base)
{
	acp63_writel(1, acp_base + ACP_EXTERNAL_INTR_ENB);
}

static void acp63_disable_interrupts(void __iomem *acp_base)
{
	acp63_writel(ACP_EXT_INTR_STAT_CLEAR_MASK, acp_base +
		     ACP_EXTERNAL_INTR_STAT);
	acp63_writel(0, acp_base + ACP_EXTERNAL_INTR_CNTL);
	acp63_writel(0, acp_base + ACP_EXTERNAL_INTR_ENB);
}

static int acp63_init(void __iomem *acp_base, struct device *dev)
{
	int ret;

	ret = acp63_power_on(acp_base);
	if (ret) {
		dev_err(dev, "ACP power on failed\n");
		return ret;
	}
	acp63_writel(0x01, acp_base + ACP_CONTROL);
	ret = acp63_reset(acp_base);
	if (ret) {
		dev_err(dev, "ACP reset failed\n");
		return ret;
	}
	acp63_writel(0x03, acp_base + ACP_CLKMUX_SEL);
	acp63_enable_interrupts(acp_base);
	return 0;
}

static int acp63_deinit(void __iomem *acp_base, struct device *dev)
{
	int ret;

	acp63_disable_interrupts(acp_base);
	ret = acp63_reset(acp_base);
	if (ret) {
		dev_err(dev, "ACP reset failed\n");
		return ret;
	}
	acp63_writel(0, acp_base + ACP_CLKMUX_SEL);
	acp63_writel(0, acp_base + ACP_CONTROL);
	return 0;
}

static irqreturn_t acp63_irq_handler(int irq, void *dev_id)
{
	struct acp63_dev_data *adata;
	struct pdm_dev_data *ps_pdm_data;
	u32 val;
	u16 pdev_index;

	adata = dev_id;
	if (!adata)
		return IRQ_NONE;

	val = acp63_readl(adata->acp63_base + ACP_EXTERNAL_INTR_STAT);
	if (val & BIT(PDM_DMA_STAT)) {
		pdev_index = adata->pdm_dev_index;
		ps_pdm_data = dev_get_drvdata(&adata->pdev[pdev_index]->dev);
		acp63_writel(BIT(PDM_DMA_STAT), adata->acp63_base + ACP_EXTERNAL_INTR_STAT);
		if (ps_pdm_data->capture_stream)
			snd_pcm_period_elapsed(ps_pdm_data->capture_stream);
		return IRQ_HANDLED;
	}
	return IRQ_NONE;
}

static void get_acp63_device_config(u32 config, struct pci_dev *pci,
				    struct acp63_dev_data *acp_data)
{
	struct acpi_device *dmic_dev;
	const union acpi_object *obj;
	bool is_dmic_dev = false;

	dmic_dev = acpi_find_child_device(ACPI_COMPANION(&pci->dev), ACP63_DMIC_ADDR, 0);
	if (dmic_dev) {
		if (!acpi_dev_get_property(dmic_dev, "acp-audio-device-type",
					   ACPI_TYPE_INTEGER, &obj) &&
					   obj->integer.value == ACP_DMIC_DEV)
			is_dmic_dev = true;
	}

	switch (config) {
	case ACP_CONFIG_0:
	case ACP_CONFIG_1:
	case ACP_CONFIG_2:
	case ACP_CONFIG_3:
	case ACP_CONFIG_9:
	case ACP_CONFIG_15:
		dev_dbg(&pci->dev, "Audio Mode %d\n", config);
		break;
	default:
		if (is_dmic_dev) {
			acp_data->pdev_mask = ACP63_PDM_DEV_MASK;
			acp_data->pdev_count = ACP63_PDM_MODE_DEVS;
		}
		break;
	}
}

static void acp63_fill_platform_dev_info(struct platform_device_info *pdevinfo,
					 struct device *parent,
					 struct fwnode_handle *fw_node,
					 char *name, unsigned int id,
					 const struct resource *res,
					 unsigned int num_res,
					 const void *data,
					 size_t size_data)
{
	pdevinfo->name = name;
	pdevinfo->id = id;
	pdevinfo->parent = parent;
	pdevinfo->num_res = num_res;
	pdevinfo->res = res;
	pdevinfo->data = data;
	pdevinfo->size_data = size_data;
	pdevinfo->fwnode = fw_node;
}

static int create_acp63_platform_devs(struct pci_dev *pci, struct acp63_dev_data *adata, u32 addr)
{
	struct platform_device_info pdevinfo[ACP63_DEVS];
	struct device *parent;
	int index;
	int ret;

	parent = &pci->dev;
	dev_dbg(&pci->dev,
		"%s pdev_mask:0x%x pdev_count:0x%x\n", __func__, adata->pdev_mask,
		adata->pdev_count);
	if (adata->pdev_mask) {
		adata->res = devm_kzalloc(&pci->dev, sizeof(struct resource), GFP_KERNEL);
		if (!adata->res) {
			ret = -ENOMEM;
			goto de_init;
		}
		adata->res->flags = IORESOURCE_MEM;
		adata->res->start = addr;
		adata->res->end = addr + (ACP63_REG_END - ACP63_REG_START);
		memset(&pdevinfo, 0, sizeof(pdevinfo));
	}

	switch (adata->pdev_mask) {
	case ACP63_PDM_DEV_MASK:
		adata->pdm_dev_index  = 0;
		acp63_fill_platform_dev_info(&pdevinfo[0], parent, NULL, "acp_ps_pdm_dma",
					     0, adata->res, 1, &adata->acp_lock,
					     sizeof(adata->acp_lock));
		acp63_fill_platform_dev_info(&pdevinfo[1], parent, NULL, "dmic-codec",
					     0, NULL, 0, NULL, 0);
		acp63_fill_platform_dev_info(&pdevinfo[2], parent, NULL, "acp_ps_mach",
					     0, NULL, 0, NULL, 0);
		break;
	default:
		dev_dbg(&pci->dev, "No PDM devices found\n");
		return 0;
	}

	for (index = 0; index < adata->pdev_count; index++) {
		adata->pdev[index] = platform_device_register_full(&pdevinfo[index]);
		if (IS_ERR(adata->pdev[index])) {
			dev_err(&pci->dev,
				"cannot register %s device\n", pdevinfo[index].name);
			ret = PTR_ERR(adata->pdev[index]);
			goto unregister_devs;
		}
	}
	return 0;
unregister_devs:
	for (--index; index >= 0; index--)
		platform_device_unregister(adata->pdev[index]);
de_init:
	if (acp63_deinit(adata->acp63_base, &pci->dev))
		dev_err(&pci->dev, "ACP de-init failed\n");
	return ret;
}

static int snd_acp63_probe(struct pci_dev *pci,
			   const struct pci_device_id *pci_id)
{
	struct acp63_dev_data *adata;
	u32 addr;
	u32 irqflags;
	int val;
	int ret;

	irqflags = IRQF_SHARED;
	/* Pink Sardine device check */
	switch (pci->revision) {
	case 0x63:
		break;
	default:
		dev_dbg(&pci->dev, "acp63 pci device not found\n");
		return -ENODEV;
	}
	if (pci_enable_device(pci)) {
		dev_err(&pci->dev, "pci_enable_device failed\n");
		return -ENODEV;
	}

	ret = pci_request_regions(pci, "AMD ACP6.2 audio");
	if (ret < 0) {
		dev_err(&pci->dev, "pci_request_regions failed\n");
		goto disable_pci;
	}
	adata = devm_kzalloc(&pci->dev, sizeof(struct acp63_dev_data),
			     GFP_KERNEL);
	if (!adata) {
		ret = -ENOMEM;
		goto release_regions;
	}

	addr = pci_resource_start(pci, 0);
	adata->acp63_base = devm_ioremap(&pci->dev, addr,
					 pci_resource_len(pci, 0));
	if (!adata->acp63_base) {
		ret = -ENOMEM;
		goto release_regions;
	}
	pci_set_master(pci);
	pci_set_drvdata(pci, adata);
	mutex_init(&adata->acp_lock);
	ret = acp63_init(adata->acp63_base, &pci->dev);
	if (ret)
		goto release_regions;
	ret = devm_request_irq(&pci->dev, pci->irq, acp63_irq_handler,
			       irqflags, "ACP_PCI_IRQ", adata);
	if (ret) {
		dev_err(&pci->dev, "ACP PCI IRQ request failed\n");
		goto de_init;
	}
	val = acp63_readl(adata->acp63_base + ACP_PIN_CONFIG);
	get_acp63_device_config(val, pci, adata);
	ret = create_acp63_platform_devs(pci, adata, addr);
	if (ret < 0) {
		dev_err(&pci->dev, "ACP platform devices creation failed\n");
		goto de_init;
	}
	pm_runtime_set_autosuspend_delay(&pci->dev, ACP_SUSPEND_DELAY_MS);
	pm_runtime_use_autosuspend(&pci->dev);
	pm_runtime_put_noidle(&pci->dev);
	pm_runtime_allow(&pci->dev);
	return 0;
de_init:
	if (acp63_deinit(adata->acp63_base, &pci->dev))
		dev_err(&pci->dev, "ACP de-init failed\n");
release_regions:
	pci_release_regions(pci);
disable_pci:
	pci_disable_device(pci);

	return ret;
}

static int __maybe_unused snd_acp63_suspend(struct device *dev)
{
	struct acp63_dev_data *adata;
	int ret;

	adata = dev_get_drvdata(dev);
	ret = acp63_deinit(adata->acp63_base, dev);
	if (ret)
		dev_err(dev, "ACP de-init failed\n");
	return ret;
}

static int __maybe_unused snd_acp63_resume(struct device *dev)
{
	struct acp63_dev_data *adata;
	int ret;

	adata = dev_get_drvdata(dev);
	ret = acp63_init(adata->acp63_base, dev);
	if (ret)
		dev_err(dev, "ACP init failed\n");
	return ret;
}

static const struct dev_pm_ops acp63_pm_ops = {
	SET_RUNTIME_PM_OPS(snd_acp63_suspend, snd_acp63_resume, NULL)
	SET_SYSTEM_SLEEP_PM_OPS(snd_acp63_suspend, snd_acp63_resume)
};

static void snd_acp63_remove(struct pci_dev *pci)
{
	struct acp63_dev_data *adata;
	int ret, index;

	adata = pci_get_drvdata(pci);
	for (index = 0; index < adata->pdev_count; index++)
		platform_device_unregister(adata->pdev[index]);
	ret = acp63_deinit(adata->acp63_base, &pci->dev);
	if (ret)
		dev_err(&pci->dev, "ACP de-init failed\n");
	pm_runtime_forbid(&pci->dev);
	pm_runtime_get_noresume(&pci->dev);
	pci_release_regions(pci);
	pci_disable_device(pci);
}

static const struct pci_device_id snd_acp63_ids[] = {
	{ PCI_DEVICE(PCI_VENDOR_ID_AMD, ACP_DEVICE_ID),
	.class = PCI_CLASS_MULTIMEDIA_OTHER << 8,
	.class_mask = 0xffffff },
	{ 0, },
};
MODULE_DEVICE_TABLE(pci, snd_acp63_ids);

static struct pci_driver ps_acp63_driver  = {
	.name = KBUILD_MODNAME,
	.id_table = snd_acp63_ids,
	.probe = snd_acp63_probe,
	.remove = snd_acp63_remove,
	.driver = {
		.pm = &acp63_pm_ops,
	}
};

module_pci_driver(ps_acp63_driver);

MODULE_AUTHOR("Vijendar.Mukunda@amd.com");
MODULE_AUTHOR("Syed.SabaKareem@amd.com");
MODULE_DESCRIPTION("AMD ACP Pink Sardine PCI driver");
MODULE_LICENSE("GPL v2");