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7#include <linux/pci.h>
8#include <linux/acpi.h>
9#include <linux/dmi.h>
10#include <linux/module.h>
11#include <linux/io.h>
12#include <linux/delay.h>
13#include <linux/platform_device.h>
14#include <linux/interrupt.h>
15#include <linux/pm_runtime.h>
16
17#include "rn_acp3x.h"
18
19static int acp_power_gating;
20module_param(acp_power_gating, int, 0644);
21MODULE_PARM_DESC(acp_power_gating, "Enable acp power gating");
22
23
24
25
26
27
28static int dmic_acpi_check = ACP_DMIC_AUTO;
29module_param(dmic_acpi_check, bint, 0644);
30MODULE_PARM_DESC(dmic_acpi_check, "Digital microphone presence (-1=auto, 0=none, 1=force)");
31
32struct acp_dev_data {
33 void __iomem *acp_base;
34 struct resource *res;
35 struct platform_device *pdev[ACP_DEVS];
36};
37
38static int rn_acp_power_on(void __iomem *acp_base)
39{
40 u32 val;
41 int timeout;
42
43 val = rn_readl(acp_base + ACP_PGFSM_STATUS);
44
45 if (val == 0)
46 return val;
47
48 if ((val & ACP_PGFSM_STATUS_MASK) !=
49 ACP_POWER_ON_IN_PROGRESS)
50 rn_writel(ACP_PGFSM_CNTL_POWER_ON_MASK,
51 acp_base + ACP_PGFSM_CONTROL);
52 timeout = 0;
53 while (++timeout < 500) {
54 val = rn_readl(acp_base + ACP_PGFSM_STATUS);
55 if (!val)
56 return 0;
57 udelay(1);
58 }
59 return -ETIMEDOUT;
60}
61
62static int rn_acp_power_off(void __iomem *acp_base)
63{
64 u32 val;
65 int timeout;
66
67 rn_writel(ACP_PGFSM_CNTL_POWER_OFF_MASK,
68 acp_base + ACP_PGFSM_CONTROL);
69 timeout = 0;
70 while (++timeout < 500) {
71 val = rn_readl(acp_base + ACP_PGFSM_STATUS);
72 if ((val & ACP_PGFSM_STATUS_MASK) == ACP_POWERED_OFF)
73 return 0;
74 udelay(1);
75 }
76 return -ETIMEDOUT;
77}
78
79static int rn_acp_reset(void __iomem *acp_base)
80{
81 u32 val;
82 int timeout;
83
84 rn_writel(1, acp_base + ACP_SOFT_RESET);
85 timeout = 0;
86 while (++timeout < 500) {
87 val = rn_readl(acp_base + ACP_SOFT_RESET);
88 if (val & ACP_SOFT_RESET_SOFTRESET_AUDDONE_MASK)
89 break;
90 cpu_relax();
91 }
92 rn_writel(0, acp_base + ACP_SOFT_RESET);
93 timeout = 0;
94 while (++timeout < 500) {
95 val = rn_readl(acp_base + ACP_SOFT_RESET);
96 if (!val)
97 return 0;
98 cpu_relax();
99 }
100 return -ETIMEDOUT;
101}
102
103static void rn_acp_enable_interrupts(void __iomem *acp_base)
104{
105 u32 ext_intr_ctrl;
106
107 rn_writel(0x01, acp_base + ACP_EXTERNAL_INTR_ENB);
108 ext_intr_ctrl = rn_readl(acp_base + ACP_EXTERNAL_INTR_CNTL);
109 ext_intr_ctrl |= ACP_ERROR_MASK;
110 rn_writel(ext_intr_ctrl, acp_base + ACP_EXTERNAL_INTR_CNTL);
111}
112
113static void rn_acp_disable_interrupts(void __iomem *acp_base)
114{
115 rn_writel(ACP_EXT_INTR_STAT_CLEAR_MASK, acp_base +
116 ACP_EXTERNAL_INTR_STAT);
117 rn_writel(0x00, acp_base + ACP_EXTERNAL_INTR_ENB);
118}
119
120static int rn_acp_init(void __iomem *acp_base)
121{
122 int ret;
123
124
125 ret = rn_acp_power_on(acp_base);
126 if (ret) {
127 pr_err("ACP power on failed\n");
128 return ret;
129 }
130 rn_writel(0x01, acp_base + ACP_CONTROL);
131
132 ret = rn_acp_reset(acp_base);
133 if (ret) {
134 pr_err("ACP reset failed\n");
135 return ret;
136 }
137 rn_writel(0x03, acp_base + ACP_CLKMUX_SEL);
138 rn_acp_enable_interrupts(acp_base);
139 return 0;
140}
141
142static int rn_acp_deinit(void __iomem *acp_base)
143{
144 int ret;
145
146 rn_acp_disable_interrupts(acp_base);
147
148 ret = rn_acp_reset(acp_base);
149 if (ret) {
150 pr_err("ACP reset failed\n");
151 return ret;
152 }
153 rn_writel(0x00, acp_base + ACP_CLKMUX_SEL);
154 rn_writel(0x00, acp_base + ACP_CONTROL);
155
156 if (acp_power_gating) {
157 ret = rn_acp_power_off(acp_base);
158 if (ret) {
159 pr_err("ACP power off failed\n");
160 return ret;
161 }
162 }
163 return 0;
164}
165
166static const struct dmi_system_id rn_acp_quirk_table[] = {
167 {
168
169 .matches = {
170 DMI_EXACT_MATCH(DMI_BOARD_VENDOR, "LENOVO"),
171 DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "81NB"),
172 }
173 },
174 {
175
176 .matches = {
177 DMI_EXACT_MATCH(DMI_BOARD_VENDOR, "LENOVO"),
178 DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "81X2"),
179 }
180 },
181 {
182
183 .matches = {
184 DMI_EXACT_MATCH(DMI_BOARD_VENDOR, "LENOVO"),
185 DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "81YQ"),
186 }
187 },
188 {
189
190 .matches = {
191 DMI_EXACT_MATCH(DMI_BOARD_VENDOR, "LENOVO"),
192 DMI_EXACT_MATCH(DMI_BOARD_NAME, "20T6CTO1WW"),
193 }
194 },
195 {
196
197 .matches = {
198 DMI_EXACT_MATCH(DMI_BOARD_VENDOR, "LENOVO"),
199 DMI_EXACT_MATCH(DMI_BOARD_NAME, "20NLCTO1WW"),
200 }
201 },
202 {}
203};
204
205static int snd_rn_acp_probe(struct pci_dev *pci,
206 const struct pci_device_id *pci_id)
207{
208 struct acp_dev_data *adata;
209 struct platform_device_info pdevinfo[ACP_DEVS];
210#if defined(CONFIG_ACPI)
211 acpi_handle handle;
212 acpi_integer dmic_status;
213#endif
214 const struct dmi_system_id *dmi_id;
215 unsigned int irqflags;
216 int ret, index;
217 u32 addr;
218
219
220 if (pci->revision != 0x01)
221 return -ENODEV;
222
223 if (pci_enable_device(pci)) {
224 dev_err(&pci->dev, "pci_enable_device failed\n");
225 return -ENODEV;
226 }
227
228 ret = pci_request_regions(pci, "AMD ACP3x audio");
229 if (ret < 0) {
230 dev_err(&pci->dev, "pci_request_regions failed\n");
231 goto disable_pci;
232 }
233
234 adata = devm_kzalloc(&pci->dev, sizeof(struct acp_dev_data),
235 GFP_KERNEL);
236 if (!adata) {
237 ret = -ENOMEM;
238 goto release_regions;
239 }
240
241
242 ret = pci_enable_msi(pci);
243 if (ret)
244
245 irqflags = IRQF_SHARED;
246 else
247
248 irqflags = 0;
249
250 addr = pci_resource_start(pci, 0);
251 adata->acp_base = devm_ioremap(&pci->dev, addr,
252 pci_resource_len(pci, 0));
253 if (!adata->acp_base) {
254 ret = -ENOMEM;
255 goto disable_msi;
256 }
257 pci_set_master(pci);
258 pci_set_drvdata(pci, adata);
259 ret = rn_acp_init(adata->acp_base);
260 if (ret)
261 goto disable_msi;
262
263 if (!dmic_acpi_check) {
264 ret = -ENODEV;
265 goto de_init;
266 } else if (dmic_acpi_check == ACP_DMIC_AUTO) {
267#if defined(CONFIG_ACPI)
268 handle = ACPI_HANDLE(&pci->dev);
269 ret = acpi_evaluate_integer(handle, "_WOV", NULL, &dmic_status);
270 if (ACPI_FAILURE(ret)) {
271 ret = -ENODEV;
272 goto de_init;
273 }
274 if (!dmic_status) {
275 ret = -ENODEV;
276 goto de_init;
277 }
278#endif
279 dmi_id = dmi_first_match(rn_acp_quirk_table);
280 if (dmi_id && !dmi_id->driver_data) {
281 dev_info(&pci->dev, "ACPI settings override using DMI (ACP mic is not present)");
282 ret = -ENODEV;
283 goto de_init;
284 }
285 }
286
287 adata->res = devm_kzalloc(&pci->dev,
288 sizeof(struct resource) * 2,
289 GFP_KERNEL);
290 if (!adata->res) {
291 ret = -ENOMEM;
292 goto de_init;
293 }
294
295 adata->res[0].name = "acp_pdm_iomem";
296 adata->res[0].flags = IORESOURCE_MEM;
297 adata->res[0].start = addr;
298 adata->res[0].end = addr + (ACP_REG_END - ACP_REG_START);
299 adata->res[1].name = "acp_pdm_irq";
300 adata->res[1].flags = IORESOURCE_IRQ;
301 adata->res[1].start = pci->irq;
302 adata->res[1].end = pci->irq;
303
304 memset(&pdevinfo, 0, sizeof(pdevinfo));
305 pdevinfo[0].name = "acp_rn_pdm_dma";
306 pdevinfo[0].id = 0;
307 pdevinfo[0].parent = &pci->dev;
308 pdevinfo[0].num_res = 2;
309 pdevinfo[0].res = adata->res;
310 pdevinfo[0].data = &irqflags;
311 pdevinfo[0].size_data = sizeof(irqflags);
312
313 pdevinfo[1].name = "dmic-codec";
314 pdevinfo[1].id = 0;
315 pdevinfo[1].parent = &pci->dev;
316 pdevinfo[2].name = "acp_pdm_mach";
317 pdevinfo[2].id = 0;
318 pdevinfo[2].parent = &pci->dev;
319 for (index = 0; index < ACP_DEVS; index++) {
320 adata->pdev[index] =
321 platform_device_register_full(&pdevinfo[index]);
322 if (IS_ERR(adata->pdev[index])) {
323 dev_err(&pci->dev, "cannot register %s device\n",
324 pdevinfo[index].name);
325 ret = PTR_ERR(adata->pdev[index]);
326 goto unregister_devs;
327 }
328 }
329 pm_runtime_set_autosuspend_delay(&pci->dev, ACP_SUSPEND_DELAY_MS);
330 pm_runtime_use_autosuspend(&pci->dev);
331 pm_runtime_put_noidle(&pci->dev);
332 pm_runtime_allow(&pci->dev);
333 return 0;
334
335unregister_devs:
336 for (index = 0; index < ACP_DEVS; index++)
337 platform_device_unregister(adata->pdev[index]);
338de_init:
339 if (rn_acp_deinit(adata->acp_base))
340 dev_err(&pci->dev, "ACP de-init failed\n");
341disable_msi:
342 pci_disable_msi(pci);
343release_regions:
344 pci_release_regions(pci);
345disable_pci:
346 pci_disable_device(pci);
347
348 return ret;
349}
350
351static int snd_rn_acp_suspend(struct device *dev)
352{
353 int ret;
354 struct acp_dev_data *adata;
355
356 adata = dev_get_drvdata(dev);
357 ret = rn_acp_deinit(adata->acp_base);
358 if (ret)
359 dev_err(dev, "ACP de-init failed\n");
360 else
361 dev_dbg(dev, "ACP de-initialized\n");
362
363 return ret;
364}
365
366static int snd_rn_acp_resume(struct device *dev)
367{
368 int ret;
369 struct acp_dev_data *adata;
370
371 adata = dev_get_drvdata(dev);
372 ret = rn_acp_init(adata->acp_base);
373 if (ret) {
374 dev_err(dev, "ACP init failed\n");
375 return ret;
376 }
377 return 0;
378}
379
380static const struct dev_pm_ops rn_acp_pm = {
381 .runtime_suspend = snd_rn_acp_suspend,
382 .runtime_resume = snd_rn_acp_resume,
383 .suspend = snd_rn_acp_suspend,
384 .resume = snd_rn_acp_resume,
385 .restore = snd_rn_acp_resume,
386 .poweroff = snd_rn_acp_suspend,
387};
388
389static void snd_rn_acp_remove(struct pci_dev *pci)
390{
391 struct acp_dev_data *adata;
392 int ret, index;
393
394 adata = pci_get_drvdata(pci);
395 for (index = 0; index < ACP_DEVS; index++)
396 platform_device_unregister(adata->pdev[index]);
397 ret = rn_acp_deinit(adata->acp_base);
398 if (ret)
399 dev_err(&pci->dev, "ACP de-init failed\n");
400 pm_runtime_forbid(&pci->dev);
401 pm_runtime_get_noresume(&pci->dev);
402 pci_disable_msi(pci);
403 pci_release_regions(pci);
404 pci_disable_device(pci);
405}
406
407static const struct pci_device_id snd_rn_acp_ids[] = {
408 { PCI_DEVICE(PCI_VENDOR_ID_AMD, ACP_DEVICE_ID),
409 .class = PCI_CLASS_MULTIMEDIA_OTHER << 8,
410 .class_mask = 0xffffff },
411 { 0, },
412};
413MODULE_DEVICE_TABLE(pci, snd_rn_acp_ids);
414
415static struct pci_driver rn_acp_driver = {
416 .name = KBUILD_MODNAME,
417 .id_table = snd_rn_acp_ids,
418 .probe = snd_rn_acp_probe,
419 .remove = snd_rn_acp_remove,
420 .driver = {
421 .pm = &rn_acp_pm,
422 }
423};
424
425module_pci_driver(rn_acp_driver);
426
427MODULE_AUTHOR("Vijendar.Mukunda@amd.com");
428MODULE_DESCRIPTION("AMD ACP Renoir PCI driver");
429MODULE_LICENSE("GPL v2");
430
