1// SPDX-License-Identifier: GPL-2.0+
2//
3// AMD ACP PCI Driver
4//
5//Copyright 2016 Advanced Micro Devices, Inc.
6
7#include <linux/pci.h>
8#include <linux/module.h>
9#include <linux/io.h>
10#include <linux/platform_device.h>
11#include <linux/interrupt.h>
12#include <linux/pm_runtime.h>
13#include <linux/delay.h>
14
15#include "acp3x.h"
16
17struct acp3x_dev_data {
18 void __iomem *acp3x_base;
19 bool acp3x_audio_mode;
20 struct resource *res;
21 struct platform_device *pdev[ACP3x_DEVS];
22 u32 pme_en;
23};
24
25static int acp3x_power_on(struct acp3x_dev_data *adata)
26{
27 void __iomem *acp3x_base = adata->acp3x_base;
28 u32 val;
29 int timeout;
30
31 val = rv_readl(base_addr: acp3x_base + mmACP_PGFSM_STATUS);
32
33 if (val == 0)
34 return val;
35
36 if (!((val & ACP_PGFSM_STATUS_MASK) ==
37 ACP_POWER_ON_IN_PROGRESS))
38 rv_writel(ACP_PGFSM_CNTL_POWER_ON_MASK,
39 base_addr: acp3x_base + mmACP_PGFSM_CONTROL);
40 timeout = 0;
41 while (++timeout < 500) {
42 val = rv_readl(base_addr: acp3x_base + mmACP_PGFSM_STATUS);
43 if (!val) {
44 /* ACP power On clears PME_EN.
45 * Restore the value to its prior state
46 */
47 rv_writel(val: adata->pme_en, base_addr: acp3x_base + mmACP_PME_EN);
48 return 0;
49 }
50 udelay(usec: 1);
51 }
52 return -ETIMEDOUT;
53}
54
55static int acp3x_reset(void __iomem *acp3x_base)
56{
57 u32 val;
58 int timeout;
59
60 rv_writel(val: 1, base_addr: acp3x_base + mmACP_SOFT_RESET);
61 timeout = 0;
62 while (++timeout < 500) {
63 val = rv_readl(base_addr: acp3x_base + mmACP_SOFT_RESET);
64 if (val & ACP3x_SOFT_RESET__SoftResetAudDone_MASK)
65 break;
66 cpu_relax();
67 }
68 rv_writel(val: 0, base_addr: acp3x_base + mmACP_SOFT_RESET);
69 timeout = 0;
70 while (++timeout < 500) {
71 val = rv_readl(base_addr: acp3x_base + mmACP_SOFT_RESET);
72 if (!val)
73 return 0;
74 cpu_relax();
75 }
76 return -ETIMEDOUT;
77}
78
79static void acp3x_enable_interrupts(void __iomem *acp_base)
80{
81 rv_writel(val: 0x01, base_addr: acp_base + mmACP_EXTERNAL_INTR_ENB);
82}
83
84static void acp3x_disable_interrupts(void __iomem *acp_base)
85{
86 rv_writel(ACP_EXT_INTR_STAT_CLEAR_MASK, base_addr: acp_base +
87 mmACP_EXTERNAL_INTR_STAT);
88 rv_writel(val: 0x00, base_addr: acp_base + mmACP_EXTERNAL_INTR_CNTL);
89 rv_writel(val: 0x00, base_addr: acp_base + mmACP_EXTERNAL_INTR_ENB);
90}
91
92static int acp3x_init(struct acp3x_dev_data *adata)
93{
94 void __iomem *acp3x_base = adata->acp3x_base;
95 int ret;
96
97 /* power on */
98 ret = acp3x_power_on(adata);
99 if (ret) {
100 pr_err("ACP3x power on failed\n");
101 return ret;
102 }
103 /* Reset */
104 ret = acp3x_reset(acp3x_base);
105 if (ret) {
106 pr_err("ACP3x reset failed\n");
107 return ret;
108 }
109 acp3x_enable_interrupts(acp_base: acp3x_base);
110 return 0;
111}
112
113static int acp3x_deinit(void __iomem *acp3x_base)
114{
115 int ret;
116
117 acp3x_disable_interrupts(acp_base: acp3x_base);
118 /* Reset */
119 ret = acp3x_reset(acp3x_base);
120 if (ret) {
121 pr_err("ACP3x reset failed\n");
122 return ret;
123 }
124 return 0;
125}
126
127static int snd_acp3x_probe(struct pci_dev *pci,
128 const struct pci_device_id *pci_id)
129{
130 struct acp3x_dev_data *adata;
131 struct platform_device_info pdevinfo[ACP3x_DEVS];
132 unsigned int irqflags;
133 int ret, i;
134 u32 addr, val;
135
136 /* Raven device detection */
137 if (pci->revision != 0x00)
138 return -ENODEV;
139
140 if (pci_enable_device(dev: pci)) {
141 dev_err(&pci->dev, "pci_enable_device failed\n");
142 return -ENODEV;
143 }
144
145 ret = pci_request_regions(pci, "AMD ACP3x audio");
146 if (ret < 0) {
147 dev_err(&pci->dev, "pci_request_regions failed\n");
148 goto disable_pci;
149 }
150
151 adata = devm_kzalloc(dev: &pci->dev, size: sizeof(struct acp3x_dev_data),
152 GFP_KERNEL);
153 if (!adata) {
154 ret = -ENOMEM;
155 goto release_regions;
156 }
157
158 irqflags = IRQF_SHARED;
159
160 addr = pci_resource_start(pci, 0);
161 adata->acp3x_base = devm_ioremap(dev: &pci->dev, offset: addr,
162 pci_resource_len(pci, 0));
163 if (!adata->acp3x_base) {
164 ret = -ENOMEM;
165 goto release_regions;
166 }
167 pci_set_master(dev: pci);
168 pci_set_drvdata(pdev: pci, data: adata);
169 /* Save ACP_PME_EN state */
170 adata->pme_en = rv_readl(base_addr: adata->acp3x_base + mmACP_PME_EN);
171 ret = acp3x_init(adata);
172 if (ret)
173 goto release_regions;
174
175 val = rv_readl(base_addr: adata->acp3x_base + mmACP_I2S_PIN_CONFIG);
176 switch (val) {
177 case I2S_MODE:
178 adata->res = devm_kzalloc(dev: &pci->dev,
179 size: sizeof(struct resource) * 4,
180 GFP_KERNEL);
181 if (!adata->res) {
182 ret = -ENOMEM;
183 goto de_init;
184 }
185
186 adata->res[0].name = "acp3x_i2s_iomem";
187 adata->res[0].flags = IORESOURCE_MEM;
188 adata->res[0].start = addr;
189 adata->res[0].end = addr + (ACP3x_REG_END - ACP3x_REG_START);
190
191 adata->res[1].name = "acp3x_i2s_sp";
192 adata->res[1].flags = IORESOURCE_MEM;
193 adata->res[1].start = addr + ACP3x_I2STDM_REG_START;
194 adata->res[1].end = addr + ACP3x_I2STDM_REG_END;
195
196 adata->res[2].name = "acp3x_i2s_bt";
197 adata->res[2].flags = IORESOURCE_MEM;
198 adata->res[2].start = addr + ACP3x_BT_TDM_REG_START;
199 adata->res[2].end = addr + ACP3x_BT_TDM_REG_END;
200
201 adata->res[3].name = "acp3x_i2s_irq";
202 adata->res[3].flags = IORESOURCE_IRQ;
203 adata->res[3].start = pci->irq;
204 adata->res[3].end = adata->res[3].start;
205
206 adata->acp3x_audio_mode = ACP3x_I2S_MODE;
207
208 memset(&pdevinfo, 0, sizeof(pdevinfo));
209 pdevinfo[0].name = "acp3x_rv_i2s_dma";
210 pdevinfo[0].id = 0;
211 pdevinfo[0].parent = &pci->dev;
212 pdevinfo[0].num_res = 4;
213 pdevinfo[0].res = &adata->res[0];
214 pdevinfo[0].data = &irqflags;
215 pdevinfo[0].size_data = sizeof(irqflags);
216
217 pdevinfo[1].name = "acp3x_i2s_playcap";
218 pdevinfo[1].id = 0;
219 pdevinfo[1].parent = &pci->dev;
220 pdevinfo[1].num_res = 1;
221 pdevinfo[1].res = &adata->res[1];
222
223 pdevinfo[2].name = "acp3x_i2s_playcap";
224 pdevinfo[2].id = 1;
225 pdevinfo[2].parent = &pci->dev;
226 pdevinfo[2].num_res = 1;
227 pdevinfo[2].res = &adata->res[1];
228
229 pdevinfo[3].name = "acp3x_i2s_playcap";
230 pdevinfo[3].id = 2;
231 pdevinfo[3].parent = &pci->dev;
232 pdevinfo[3].num_res = 1;
233 pdevinfo[3].res = &adata->res[2];
234 for (i = 0; i < ACP3x_DEVS; i++) {
235 adata->pdev[i] =
236 platform_device_register_full(pdevinfo: &pdevinfo[i]);
237 if (IS_ERR(ptr: adata->pdev[i])) {
238 dev_err(&pci->dev, "cannot register %s device\n",
239 pdevinfo[i].name);
240 ret = PTR_ERR(ptr: adata->pdev[i]);
241 goto unregister_devs;
242 }
243 }
244 break;
245 default:
246 dev_info(&pci->dev, "ACP audio mode : %d\n", val);
247 break;
248 }
249 pm_runtime_set_autosuspend_delay(dev: &pci->dev, delay: 2000);
250 pm_runtime_use_autosuspend(dev: &pci->dev);
251 pm_runtime_put_noidle(dev: &pci->dev);
252 pm_runtime_allow(dev: &pci->dev);
253 return 0;
254
255unregister_devs:
256 if (val == I2S_MODE)
257 for (i = 0; i < ACP3x_DEVS; i++)
258 platform_device_unregister(adata->pdev[i]);
259de_init:
260 if (acp3x_deinit(acp3x_base: adata->acp3x_base))
261 dev_err(&pci->dev, "ACP de-init failed\n");
262release_regions:
263 pci_release_regions(pci);
264disable_pci:
265 pci_disable_device(dev: pci);
266
267 return ret;
268}
269
270static int snd_acp3x_suspend(struct device *dev)
271{
272 int ret;
273 struct acp3x_dev_data *adata;
274
275 adata = dev_get_drvdata(dev);
276 ret = acp3x_deinit(acp3x_base: adata->acp3x_base);
277 if (ret)
278 dev_err(dev, "ACP de-init failed\n");
279 else
280 dev_dbg(dev, "ACP de-initialized\n");
281
282 return 0;
283}
284
285static int snd_acp3x_resume(struct device *dev)
286{
287 int ret;
288 struct acp3x_dev_data *adata;
289
290 adata = dev_get_drvdata(dev);
291 ret = acp3x_init(adata);
292 if (ret) {
293 dev_err(dev, "ACP init failed\n");
294 return ret;
295 }
296 return 0;
297}
298
299static const struct dev_pm_ops acp3x_pm = {
300 .runtime_suspend = snd_acp3x_suspend,
301 .runtime_resume = snd_acp3x_resume,
302 .resume = snd_acp3x_resume,
303};
304
305static void snd_acp3x_remove(struct pci_dev *pci)
306{
307 struct acp3x_dev_data *adata;
308 int i, ret;
309
310 adata = pci_get_drvdata(pdev: pci);
311 if (adata->acp3x_audio_mode == ACP3x_I2S_MODE) {
312 for (i = 0; i < ACP3x_DEVS; i++)
313 platform_device_unregister(adata->pdev[i]);
314 }
315 ret = acp3x_deinit(acp3x_base: adata->acp3x_base);
316 if (ret)
317 dev_err(&pci->dev, "ACP de-init failed\n");
318 pm_runtime_forbid(dev: &pci->dev);
319 pm_runtime_get_noresume(dev: &pci->dev);
320 pci_release_regions(pci);
321 pci_disable_device(dev: pci);
322}
323
324static const struct pci_device_id snd_acp3x_ids[] = {
325 { PCI_DEVICE(PCI_VENDOR_ID_AMD, 0x15e2),
326 .class = PCI_CLASS_MULTIMEDIA_OTHER << 8,
327 .class_mask = 0xffffff },
328 { 0, },
329};
330MODULE_DEVICE_TABLE(pci, snd_acp3x_ids);
331
332static struct pci_driver acp3x_driver = {
333 .name = KBUILD_MODNAME,
334 .id_table = snd_acp3x_ids,
335 .probe = snd_acp3x_probe,
336 .remove = snd_acp3x_remove,
337 .driver = {
338 .pm = &acp3x_pm,
339 }
340};
341
342module_pci_driver(acp3x_driver);
343
344MODULE_AUTHOR("Vishnuvardhanrao.Ravulapati@amd.com");
345MODULE_AUTHOR("Maruthi.Bayyavarapu@amd.com");
346MODULE_DESCRIPTION("AMD ACP3x PCI driver");
347MODULE_LICENSE("GPL v2");
348

source code of linux/sound/soc/amd/raven/pci-acp3x.c