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
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 && flag != FLAG_AMD_LEGACY_ONLY_DMIC)
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 case 0x63:
91 chip->name = "acp_asoc_acp63";
92 chip->acp_rev = ACP63_DEV;
93 break;
94 case 0x70:
95 chip->name = "acp_asoc_acp70";
96 chip->acp_rev = ACP70_DEV;
97 break;
98 default:
99 dev_err(dev, "Unsupported device revision:0x%x\n", pci->revision);
100 ret = -EINVAL;
101 goto release_regions;
102 }
103 chip->flag = flag;
104 dmic_dev = platform_device_register_data(dev, "dmic-codec", PLATFORM_DEVID_NONE, NULL, 0);
105 if (IS_ERR(dmic_dev)) {
106 dev_err(dev, "failed to create DMIC device\n");
107 ret = PTR_ERR(dmic_dev);
108 goto release_regions;
109 }
110
111 addr = pci_resource_start(pci, 0);
112 chip->base = devm_ioremap(&pci->dev, addr, pci_resource_len(pci, 0));
113 if (!chip->base) {
114 ret = -ENOMEM;
115 goto unregister_dmic_dev;
116 }
117
118 ret = acp_init(chip);
119 if (ret)
120 goto unregister_dmic_dev;
121
122 check_acp_config(pci, chip);
123 if (!chip->is_pdm_dev && !chip->is_i2s_config)
124 goto skip_pdev_creation;
125
126 res = devm_kcalloc(&pci->dev, num_res, sizeof(struct resource), GFP_KERNEL);
127 if (!res) {
128 ret = -ENOMEM;
129 goto unregister_dmic_dev;
130 }
131
132 for (i = 0; i < num_res; i++, res_acp++) {
133 res[i].name = res_acp->name;
134 res[i].flags = res_acp->flags;
135 res[i].start = addr + res_acp->start;
136 res[i].end = addr + res_acp->end;
137 if (res_acp->flags == IORESOURCE_IRQ) {
138 res[i].start = pci->irq;
139 res[i].end = res[i].start;
140 }
141 }
142
143 memset(&pdevinfo, 0, sizeof(pdevinfo));
144
145 pdevinfo.name = chip->name;
146 pdevinfo.id = 0;
147 pdevinfo.parent = &pci->dev;
148 pdevinfo.num_res = num_res;
149 pdevinfo.res = &res[0];
150 pdevinfo.data = chip;
151 pdevinfo.size_data = sizeof(*chip);
152
153 pdev = platform_device_register_full(&pdevinfo);
154 if (IS_ERR(pdev)) {
155 dev_err(&pci->dev, "cannot register %s device\n", pdevinfo.name);
156 ret = PTR_ERR(pdev);
157 goto unregister_dmic_dev;
158 }
159
160 skip_pdev_creation:
161 chip->chip_pdev = pdev;
162 dev_set_drvdata(&pci->dev, chip);
163 pm_runtime_set_autosuspend_delay(&pci->dev, 2000);
164 pm_runtime_use_autosuspend(&pci->dev);
165 pm_runtime_put_noidle(&pci->dev);
166 pm_runtime_allow(&pci->dev);
167 return ret;
168
169 unregister_dmic_dev:
170 platform_device_unregister(dmic_dev);
171 release_regions:
172 pci_release_regions(pci);
173 disable_pci:
174 pci_disable_device(pci);
175
176 return ret;
177 };
178
179 static int __maybe_unused snd_acp_suspend(struct device *dev)
180 {
181 struct acp_chip_info *chip;
182 int ret;
183
184 chip = dev_get_drvdata(dev);
185 ret = acp_deinit(chip);
186 if (ret)
187 dev_err(dev, "ACP de-init failed\n");
188 return ret;
189 }
190
191 static int __maybe_unused snd_acp_resume(struct device *dev)
192 {
193 struct acp_chip_info *chip;
194 struct acp_dev_data *adata;
195 struct device child;
196 int ret;
197
198 chip = dev_get_drvdata(dev);
199 ret = acp_init(chip);
200 if (ret)
201 dev_err(dev, "ACP init failed\n");
202 if (chip->chip_pdev) {
203 child = chip->chip_pdev->dev;
204 adata = dev_get_drvdata(&child);
205 if (adata)
206 acp_enable_interrupts(adata);
207 }
208 return ret;
209 }
210
211 static const struct dev_pm_ops acp_pm_ops = {
212 SET_RUNTIME_PM_OPS(snd_acp_suspend, snd_acp_resume, NULL)
213 SET_SYSTEM_SLEEP_PM_OPS(snd_acp_suspend, snd_acp_resume)
214 };
215
216 static void acp_pci_remove(struct pci_dev *pci)
217 {
218 struct acp_chip_info *chip;
219 int ret;
220
221 chip = pci_get_drvdata(pci);
222 pm_runtime_forbid(&pci->dev);
223 pm_runtime_get_noresume(&pci->dev);
224 if (dmic_dev)
225 platform_device_unregister(dmic_dev);
226 if (pdev)
227 platform_device_unregister(pdev);
228 ret = acp_deinit(chip);
229 if (ret)
230 dev_err(&pci->dev, "ACP de-init failed\n");
231 }
232
233 /* PCI IDs */
234 static const struct pci_device_id acp_pci_ids[] = {
235 { PCI_DEVICE(PCI_VENDOR_ID_AMD, ACP_PCI_DEV_ID)},
236 { 0, }
237 };
238 MODULE_DEVICE_TABLE(pci, acp_pci_ids);
239
240 /* pci_driver definition */
241 static struct pci_driver snd_amd_acp_pci_driver = {
242 .name = KBUILD_MODNAME,
243 .id_table = acp_pci_ids,
244 .probe = acp_pci_probe,
245 .remove = acp_pci_remove,
246 .driver = {
247 .pm = &acp_pm_ops,
248 },
249 };
250 module_pci_driver(snd_amd_acp_pci_driver);
251
252 MODULE_DESCRIPTION("AMD ACP common PCI support");
253 MODULE_LICENSE("Dual BSD/GPL");
254 MODULE_IMPORT_NS(SND_SOC_ACP_COMMON);
255 MODULE_ALIAS(DRV_NAME);
256
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