1 // SPDX-License-Identifier: GPL-2.0+
2 //
3 // AMD Vangogh ACP PCI Driver
4 //
5 // Copyright (C) 2021 Advanced Micro Devices, Inc. All rights reserved.
6
7 #include <linux/pci.h>
8 #include <linux/module.h>
9 #include <linux/io.h>
10 #include <linux/delay.h>
11 #include <linux/platform_device.h>
12 #include <linux/interrupt.h>
13 #include <linux/pm_runtime.h>
14
15 #include "acp5x.h"
16
17 struct acp5x_dev_data {
18 void __iomem *acp5x_base;
19 bool acp5x_audio_mode;
20 struct resource *res;
21 struct platform_device *pdev[ACP5x_DEVS];
22 };
23
acp5x_power_on(void __iomem * acp5x_base)24 static int acp5x_power_on(void __iomem *acp5x_base)
25 {
26 u32 val;
27 int timeout;
28
29 val = acp_readl(acp5x_base + ACP_PGFSM_STATUS);
30
31 if (val == 0)
32 return val;
33
34 if ((val & ACP_PGFSM_STATUS_MASK) !=
35 ACP_POWER_ON_IN_PROGRESS)
36 acp_writel(ACP_PGFSM_CNTL_POWER_ON_MASK,
37 acp5x_base + ACP_PGFSM_CONTROL);
38 timeout = 0;
39 while (++timeout < 500) {
40 val = acp_readl(acp5x_base + ACP_PGFSM_STATUS);
41 if ((val & ACP_PGFSM_STATUS_MASK) == ACP_POWERED_ON)
42 return 0;
43 udelay(1);
44 }
45 return -ETIMEDOUT;
46 }
47
acp5x_reset(void __iomem * acp5x_base)48 static int acp5x_reset(void __iomem *acp5x_base)
49 {
50 u32 val;
51 int timeout;
52
53 acp_writel(1, acp5x_base + ACP_SOFT_RESET);
54 timeout = 0;
55 while (++timeout < 500) {
56 val = acp_readl(acp5x_base + ACP_SOFT_RESET);
57 if (val & ACP_SOFT_RESET_SOFTRESET_AUDDONE_MASK)
58 break;
59 cpu_relax();
60 }
61 acp_writel(0, acp5x_base + ACP_SOFT_RESET);
62 timeout = 0;
63 while (++timeout < 500) {
64 val = acp_readl(acp5x_base + ACP_SOFT_RESET);
65 if (!val)
66 return 0;
67 cpu_relax();
68 }
69 return -ETIMEDOUT;
70 }
71
acp5x_enable_interrupts(void __iomem * acp5x_base)72 static void acp5x_enable_interrupts(void __iomem *acp5x_base)
73 {
74 acp_writel(0x01, acp5x_base + ACP_EXTERNAL_INTR_ENB);
75 }
76
acp5x_disable_interrupts(void __iomem * acp5x_base)77 static void acp5x_disable_interrupts(void __iomem *acp5x_base)
78 {
79 acp_writel(ACP_EXT_INTR_STAT_CLEAR_MASK, acp5x_base +
80 ACP_EXTERNAL_INTR_STAT);
81 acp_writel(0x00, acp5x_base + ACP_EXTERNAL_INTR_CNTL);
82 acp_writel(0x00, acp5x_base + ACP_EXTERNAL_INTR_ENB);
83 }
84
acp5x_init(void __iomem * acp5x_base)85 static int acp5x_init(void __iomem *acp5x_base)
86 {
87 int ret;
88
89 /* power on */
90 ret = acp5x_power_on(acp5x_base);
91 if (ret) {
92 pr_err("ACP5x power on failed\n");
93 return ret;
94 }
95 acp_writel(0x01, acp5x_base + ACP_CONTROL);
96 /* Reset */
97 ret = acp5x_reset(acp5x_base);
98 if (ret) {
99 pr_err("ACP5x reset failed\n");
100 return ret;
101 }
102 acp_writel(0x03, acp5x_base + ACP_CLKMUX_SEL);
103 acp5x_enable_interrupts(acp5x_base);
104 return 0;
105 }
106
acp5x_deinit(void __iomem * acp5x_base)107 static int acp5x_deinit(void __iomem *acp5x_base)
108 {
109 int ret;
110
111 acp5x_disable_interrupts(acp5x_base);
112 /* Reset */
113 ret = acp5x_reset(acp5x_base);
114 if (ret) {
115 pr_err("ACP5x reset failed\n");
116 return ret;
117 }
118 acp_writel(0x00, acp5x_base + ACP_CLKMUX_SEL);
119 acp_writel(0x00, acp5x_base + ACP_CONTROL);
120 return 0;
121 }
122
snd_acp5x_probe(struct pci_dev * pci,const struct pci_device_id * pci_id)123 static int snd_acp5x_probe(struct pci_dev *pci,
124 const struct pci_device_id *pci_id)
125 {
126 struct acp5x_dev_data *adata;
127 struct platform_device_info pdevinfo[ACP5x_DEVS];
128 unsigned int irqflags;
129 int ret, i;
130 u32 addr, val;
131
132 irqflags = IRQF_SHARED;
133 if (pci->revision != 0x50)
134 return -ENODEV;
135
136 if (pci_enable_device(pci)) {
137 dev_err(&pci->dev, "pci_enable_device failed\n");
138 return -ENODEV;
139 }
140
141 ret = pci_request_regions(pci, "AMD ACP5x audio");
142 if (ret < 0) {
143 dev_err(&pci->dev, "pci_request_regions failed\n");
144 goto disable_pci;
145 }
146
147 adata = devm_kzalloc(&pci->dev, sizeof(struct acp5x_dev_data),
148 GFP_KERNEL);
149 if (!adata) {
150 ret = -ENOMEM;
151 goto release_regions;
152 }
153 addr = pci_resource_start(pci, 0);
154 adata->acp5x_base = devm_ioremap(&pci->dev, addr,
155 pci_resource_len(pci, 0));
156 if (!adata->acp5x_base) {
157 ret = -ENOMEM;
158 goto release_regions;
159 }
160 pci_set_master(pci);
161 pci_set_drvdata(pci, adata);
162 ret = acp5x_init(adata->acp5x_base);
163 if (ret)
164 goto release_regions;
165
166 val = acp_readl(adata->acp5x_base + ACP_PIN_CONFIG);
167 switch (val) {
168 case I2S_MODE:
169 adata->res = devm_kzalloc(&pci->dev,
170 sizeof(struct resource) * ACP5x_RES,
171 GFP_KERNEL);
172 if (!adata->res) {
173 ret = -ENOMEM;
174 goto de_init;
175 }
176
177 adata->res[0].name = "acp5x_i2s_iomem";
178 adata->res[0].flags = IORESOURCE_MEM;
179 adata->res[0].start = addr;
180 adata->res[0].end = addr + (ACP5x_REG_END - ACP5x_REG_START);
181
182 adata->res[1].name = "acp5x_i2s_sp";
183 adata->res[1].flags = IORESOURCE_MEM;
184 adata->res[1].start = addr + ACP5x_I2STDM_REG_START;
185 adata->res[1].end = addr + ACP5x_I2STDM_REG_END;
186
187 adata->res[2].name = "acp5x_i2s_hs";
188 adata->res[2].flags = IORESOURCE_MEM;
189 adata->res[2].start = addr + ACP5x_HS_TDM_REG_START;
190 adata->res[2].end = addr + ACP5x_HS_TDM_REG_END;
191
192 adata->res[3].name = "acp5x_i2s_irq";
193 adata->res[3].flags = IORESOURCE_IRQ;
194 adata->res[3].start = pci->irq;
195 adata->res[3].end = adata->res[3].start;
196
197 adata->acp5x_audio_mode = ACP5x_I2S_MODE;
198
199 memset(&pdevinfo, 0, sizeof(pdevinfo));
200 pdevinfo[0].name = "acp5x_i2s_dma";
201 pdevinfo[0].id = 0;
202 pdevinfo[0].parent = &pci->dev;
203 pdevinfo[0].num_res = 4;
204 pdevinfo[0].res = &adata->res[0];
205 pdevinfo[0].data = &irqflags;
206 pdevinfo[0].size_data = sizeof(irqflags);
207
208 pdevinfo[1].name = "acp5x_i2s_playcap";
209 pdevinfo[1].id = 0;
210 pdevinfo[1].parent = &pci->dev;
211 pdevinfo[1].num_res = 1;
212 pdevinfo[1].res = &adata->res[1];
213
214 pdevinfo[2].name = "acp5x_i2s_playcap";
215 pdevinfo[2].id = 1;
216 pdevinfo[2].parent = &pci->dev;
217 pdevinfo[2].num_res = 1;
218 pdevinfo[2].res = &adata->res[2];
219
220 pdevinfo[3].name = "acp5x_mach";
221 pdevinfo[3].id = 0;
222 pdevinfo[3].parent = &pci->dev;
223 for (i = 0; i < ACP5x_DEVS; i++) {
224 adata->pdev[i] =
225 platform_device_register_full(&pdevinfo[i]);
226 if (IS_ERR(adata->pdev[i])) {
227 dev_err(&pci->dev, "cannot register %s device\n",
228 pdevinfo[i].name);
229 ret = PTR_ERR(adata->pdev[i]);
230 goto unregister_devs;
231 }
232 }
233 break;
234 default:
235 dev_info(&pci->dev, "ACP audio mode : %d\n", val);
236 }
237 pm_runtime_set_autosuspend_delay(&pci->dev, 2000);
238 pm_runtime_use_autosuspend(&pci->dev);
239 pm_runtime_put_noidle(&pci->dev);
240 pm_runtime_allow(&pci->dev);
241 return 0;
242
243 unregister_devs:
244 for (--i; i >= 0; i--)
245 platform_device_unregister(adata->pdev[i]);
246 de_init:
247 if (acp5x_deinit(adata->acp5x_base))
248 dev_err(&pci->dev, "ACP de-init failed\n");
249 release_regions:
250 pci_release_regions(pci);
251 disable_pci:
252 pci_disable_device(pci);
253
254 return ret;
255 }
256
snd_acp5x_suspend(struct device * dev)257 static int __maybe_unused snd_acp5x_suspend(struct device *dev)
258 {
259 int ret;
260 struct acp5x_dev_data *adata;
261
262 adata = dev_get_drvdata(dev);
263 ret = acp5x_deinit(adata->acp5x_base);
264 if (ret)
265 dev_err(dev, "ACP de-init failed\n");
266 else
267 dev_dbg(dev, "ACP de-initialized\n");
268
269 return ret;
270 }
271
snd_acp5x_resume(struct device * dev)272 static int __maybe_unused snd_acp5x_resume(struct device *dev)
273 {
274 int ret;
275 struct acp5x_dev_data *adata;
276
277 adata = dev_get_drvdata(dev);
278 ret = acp5x_init(adata->acp5x_base);
279 if (ret) {
280 dev_err(dev, "ACP init failed\n");
281 return ret;
282 }
283 return 0;
284 }
285
286 static const struct dev_pm_ops acp5x_pm = {
287 SET_RUNTIME_PM_OPS(snd_acp5x_suspend,
288 snd_acp5x_resume, NULL)
289 SET_SYSTEM_SLEEP_PM_OPS(snd_acp5x_suspend, snd_acp5x_resume)
290 };
291
snd_acp5x_remove(struct pci_dev * pci)292 static void snd_acp5x_remove(struct pci_dev *pci)
293 {
294 struct acp5x_dev_data *adata;
295 int i, ret;
296
297 adata = pci_get_drvdata(pci);
298 if (adata->acp5x_audio_mode == ACP5x_I2S_MODE) {
299 for (i = 0; i < ACP5x_DEVS; i++)
300 platform_device_unregister(adata->pdev[i]);
301 }
302 ret = acp5x_deinit(adata->acp5x_base);
303 if (ret)
304 dev_err(&pci->dev, "ACP de-init failed\n");
305 pm_runtime_forbid(&pci->dev);
306 pm_runtime_get_noresume(&pci->dev);
307 pci_release_regions(pci);
308 pci_disable_device(pci);
309 }
310
311 static const struct pci_device_id snd_acp5x_ids[] = {
312 { PCI_DEVICE(PCI_VENDOR_ID_AMD, ACP_DEVICE_ID),
313 .class = PCI_CLASS_MULTIMEDIA_OTHER << 8,
314 .class_mask = 0xffffff },
315 { 0, },
316 };
317 MODULE_DEVICE_TABLE(pci, snd_acp5x_ids);
318
319 static struct pci_driver acp5x_driver = {
320 .name = KBUILD_MODNAME,
321 .id_table = snd_acp5x_ids,
322 .probe = snd_acp5x_probe,
323 .remove = snd_acp5x_remove,
324 .driver = {
325 .pm = &acp5x_pm,
326 }
327 };
328
329 module_pci_driver(acp5x_driver);
330
331 MODULE_AUTHOR("Vijendar.Mukunda@amd.com");
332 MODULE_DESCRIPTION("AMD Vangogh ACP PCI driver");
333 MODULE_LICENSE("GPL v2");
334
