1 // SPDX-License-Identifier: (GPL-2.0-only OR BSD-3-Clause)
2 //
3 // This file is provided under a dual BSD/GPLv2 license. When using or
4 // redistributing this file, you may do so under either license.
5 //
6 // Copyright(c) 2022 Advanced Micro Devices, Inc. All rights reserved.
7 //
8 // Authors: Ajit Kumar Pandey <AjitKumar.Pandey@amd.com>
9
10 /*
11 * Generic PCI interface for ACP device
12 */
13
14 #include <linux/delay.h>
15 #include <linux/interrupt.h>
16 #include <linux/pci.h>
17 #include <linux/platform_device.h>
18 #include <linux/module.h>
19 #include <linux/pm_runtime.h>
20
21 #include "amd.h"
22 #include "../mach-config.h"
23
24 #define DRV_NAME "acp_pci"
25
26 #define ACP3x_REG_START 0x1240000
27 #define ACP3x_REG_END 0x125C000
28
29 static struct platform_device *dmic_dev;
30 static struct platform_device *pdev;
31
32 static const struct resource acp_res[] = {
33 {
34 .start = 0,
35 .end = ACP3x_REG_END - ACP3x_REG_START,
36 .name = "acp_mem",
37 .flags = IORESOURCE_MEM,
38 },
39 {
40 .start = 0,
41 .end = 0,
42 .name = "acp_dai_irq",
43 .flags = IORESOURCE_IRQ,
44 },
45 };
46
acp_pci_probe(struct pci_dev * pci,const struct pci_device_id * pci_id)47 static int acp_pci_probe(struct pci_dev *pci, const struct pci_device_id *pci_id)
48 {
49 struct platform_device_info pdevinfo;
50 struct device *dev = &pci->dev;
51 const struct resource *res_acp;
52 struct acp_chip_info *chip;
53 struct resource *res;
54 unsigned int flag, addr, num_res, i;
55 int ret;
56
57 flag = snd_amd_acp_find_config(pci);
58 if (flag != FLAG_AMD_LEGACY)
59 return -ENODEV;
60
61 chip = devm_kzalloc(&pci->dev, sizeof(*chip), GFP_KERNEL);
62 if (!chip)
63 return -ENOMEM;
64
65 if (pci_enable_device(pci))
66 return dev_err_probe(&pci->dev, -ENODEV,
67 "pci_enable_device failed\n");
68
69 ret = pci_request_regions(pci, "AMD ACP3x audio");
70 if (ret < 0) {
71 dev_err(&pci->dev, "pci_request_regions failed\n");
72 ret = -ENOMEM;
73 goto disable_pci;
74 }
75
76 pci_set_master(pci);
77
78 res_acp = acp_res;
79 num_res = ARRAY_SIZE(acp_res);
80
81 switch (pci->revision) {
82 case 0x01:
83 chip->name = "acp_asoc_renoir";
84 chip->acp_rev = ACP3X_DEV;
85 break;
86 case 0x6f:
87 chip->name = "acp_asoc_rembrandt";
88 chip->acp_rev = ACP6X_DEV;
89 break;
90 default:
91 dev_err(dev, "Unsupported device revision:0x%x\n", pci->revision);
92 ret = -EINVAL;
93 goto release_regions;
94 }
95
96 dmic_dev = platform_device_register_data(dev, "dmic-codec", PLATFORM_DEVID_NONE, NULL, 0);
97 if (IS_ERR(dmic_dev)) {
98 dev_err(dev, "failed to create DMIC device\n");
99 ret = PTR_ERR(dmic_dev);
100 goto release_regions;
101 }
102
103 addr = pci_resource_start(pci, 0);
104 chip->base = devm_ioremap(&pci->dev, addr, pci_resource_len(pci, 0));
105 if (!chip->base) {
106 ret = -ENOMEM;
107 goto unregister_dmic_dev;
108 }
109
110 ret = acp_init(chip);
111 if (ret)
112 goto unregister_dmic_dev;
113
114 res = devm_kcalloc(&pci->dev, num_res, sizeof(struct resource), GFP_KERNEL);
115 if (!res) {
116 ret = -ENOMEM;
117 goto unregister_dmic_dev;
118 }
119
120 for (i = 0; i < num_res; i++, res_acp++) {
121 res[i].name = res_acp->name;
122 res[i].flags = res_acp->flags;
123 res[i].start = addr + res_acp->start;
124 res[i].end = addr + res_acp->end;
125 if (res_acp->flags == IORESOURCE_IRQ) {
126 res[i].start = pci->irq;
127 res[i].end = res[i].start;
128 }
129 }
130
131 memset(&pdevinfo, 0, sizeof(pdevinfo));
132
133 pdevinfo.name = chip->name;
134 pdevinfo.id = 0;
135 pdevinfo.parent = &pci->dev;
136 pdevinfo.num_res = num_res;
137 pdevinfo.res = &res[0];
138 pdevinfo.data = chip;
139 pdevinfo.size_data = sizeof(*chip);
140
141 pdev = platform_device_register_full(&pdevinfo);
142 if (IS_ERR(pdev)) {
143 dev_err(&pci->dev, "cannot register %s device\n", pdevinfo.name);
144 ret = PTR_ERR(pdev);
145 goto unregister_dmic_dev;
146 }
147 chip->chip_pdev = pdev;
148 dev_set_drvdata(&pci->dev, chip);
149 pm_runtime_set_autosuspend_delay(&pci->dev, 2000);
150 pm_runtime_use_autosuspend(&pci->dev);
151 pm_runtime_put_noidle(&pci->dev);
152 pm_runtime_allow(&pci->dev);
153 return ret;
154
155 unregister_dmic_dev:
156 platform_device_unregister(dmic_dev);
157 release_regions:
158 pci_release_regions(pci);
159 disable_pci:
160 pci_disable_device(pci);
161
162 return ret;
163 };
164
snd_acp_suspend(struct device * dev)165 static int __maybe_unused snd_acp_suspend(struct device *dev)
166 {
167 struct acp_chip_info *chip;
168 int ret;
169
170 chip = dev_get_drvdata(dev);
171 ret = acp_deinit(chip->base);
172 if (ret)
173 dev_err(dev, "ACP de-init failed\n");
174 return ret;
175 }
176
snd_acp_resume(struct device * dev)177 static int __maybe_unused snd_acp_resume(struct device *dev)
178 {
179 struct acp_chip_info *chip;
180 struct acp_dev_data *adata;
181 struct device child;
182 int ret;
183
184 chip = dev_get_drvdata(dev);
185 ret = acp_init(chip);
186 if (ret)
187 dev_err(dev, "ACP init failed\n");
188 if (chip->chip_pdev) {
189 child = chip->chip_pdev->dev;
190 adata = dev_get_drvdata(&child);
191 if (adata)
192 acp_enable_interrupts(adata);
193 }
194 return ret;
195 }
196
197 static const struct dev_pm_ops acp_pm_ops = {
198 SET_RUNTIME_PM_OPS(snd_acp_suspend, snd_acp_resume, NULL)
199 SET_SYSTEM_SLEEP_PM_OPS(snd_acp_suspend, snd_acp_resume)
200 };
201
acp_pci_remove(struct pci_dev * pci)202 static void acp_pci_remove(struct pci_dev *pci)
203 {
204 struct acp_chip_info *chip;
205 int ret;
206
207 chip = pci_get_drvdata(pci);
208 pm_runtime_forbid(&pci->dev);
209 pm_runtime_get_noresume(&pci->dev);
210 if (dmic_dev)
211 platform_device_unregister(dmic_dev);
212 if (pdev)
213 platform_device_unregister(pdev);
214 ret = acp_deinit(chip->base);
215 if (ret)
216 dev_err(&pci->dev, "ACP de-init failed\n");
217 }
218
219 /* PCI IDs */
220 static const struct pci_device_id acp_pci_ids[] = {
221 { PCI_DEVICE(PCI_VENDOR_ID_AMD, ACP_PCI_DEV_ID)},
222 { 0, }
223 };
224 MODULE_DEVICE_TABLE(pci, acp_pci_ids);
225
226 /* pci_driver definition */
227 static struct pci_driver snd_amd_acp_pci_driver = {
228 .name = KBUILD_MODNAME,
229 .id_table = acp_pci_ids,
230 .probe = acp_pci_probe,
231 .remove = acp_pci_remove,
232 .driver = {
233 .pm = &acp_pm_ops,
234 },
235 };
236 module_pci_driver(snd_amd_acp_pci_driver);
237
238 MODULE_LICENSE("Dual BSD/GPL");
239 MODULE_IMPORT_NS(SND_SOC_ACP_COMMON);
240 MODULE_ALIAS(DRV_NAME);
241