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 && 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 chip->acp_rev = pci->revision;
81 switch (pci->revision) {
82 case 0x01:
83 chip->name = "acp_asoc_renoir";
84 break;
85 case 0x6f:
86 chip->name = "acp_asoc_rembrandt";
87 break;
88 case 0x63:
89 chip->name = "acp_asoc_acp63";
90 break;
91 case 0x70:
92 chip->name = "acp_asoc_acp70";
93 break;
94 case 0x71:
95 chip->name = "acp_asoc_acp70";
96 break;
97 default:
98 dev_err(dev, "Unsupported device revision:0x%x\n", pci->revision);
99 ret = -EINVAL;
100 goto release_regions;
101 }
102 chip->flag = flag;
103 dmic_dev = platform_device_register_data(dev, "dmic-codec", PLATFORM_DEVID_NONE, NULL, 0);
104 if (IS_ERR(dmic_dev)) {
105 dev_err(dev, "failed to create DMIC device\n");
106 ret = PTR_ERR(dmic_dev);
107 goto release_regions;
108 }
109
110 addr = pci_resource_start(pci, 0);
111 chip->base = devm_ioremap(&pci->dev, addr, pci_resource_len(pci, 0));
112 if (!chip->base) {
113 ret = -ENOMEM;
114 goto unregister_dmic_dev;
115 }
116
117 ret = acp_init(chip);
118 if (ret)
119 goto unregister_dmic_dev;
120
121 check_acp_config(pci, chip);
122 if (!chip->is_pdm_dev && !chip->is_i2s_config)
123 goto skip_pdev_creation;
124
125 res = devm_kcalloc(&pci->dev, num_res, sizeof(struct resource), GFP_KERNEL);
126 if (!res) {
127 ret = -ENOMEM;
128 goto unregister_dmic_dev;
129 }
130
131 for (i = 0; i < num_res; i++, res_acp++) {
132 res[i].name = res_acp->name;
133 res[i].flags = res_acp->flags;
134 res[i].start = addr + res_acp->start;
135 res[i].end = addr + res_acp->end;
136 if (res_acp->flags == IORESOURCE_IRQ) {
137 res[i].start = pci->irq;
138 res[i].end = res[i].start;
139 }
140 }
141
142 memset(&pdevinfo, 0, sizeof(pdevinfo));
143
144 pdevinfo.name = chip->name;
145 pdevinfo.id = 0;
146 pdevinfo.parent = &pci->dev;
147 pdevinfo.num_res = num_res;
148 pdevinfo.res = &res[0];
149 pdevinfo.data = chip;
150 pdevinfo.size_data = sizeof(*chip);
151
152 pdev = platform_device_register_full(&pdevinfo);
153 if (IS_ERR(pdev)) {
154 dev_err(&pci->dev, "cannot register %s device\n", pdevinfo.name);
155 ret = PTR_ERR(pdev);
156 goto unregister_dmic_dev;
157 }
158
159 skip_pdev_creation:
160 chip->chip_pdev = pdev;
161 dev_set_drvdata(&pci->dev, chip);
162 pm_runtime_set_autosuspend_delay(&pci->dev, 2000);
163 pm_runtime_use_autosuspend(&pci->dev);
164 pm_runtime_put_noidle(&pci->dev);
165 pm_runtime_allow(&pci->dev);
166 return ret;
167
168 unregister_dmic_dev:
169 platform_device_unregister(dmic_dev);
170 release_regions:
171 pci_release_regions(pci);
172 disable_pci:
173 pci_disable_device(pci);
174
175 return ret;
176 };
177
snd_acp_suspend(struct device * dev)178 static int __maybe_unused snd_acp_suspend(struct device *dev)
179 {
180 struct acp_chip_info *chip;
181 int ret;
182
183 chip = dev_get_drvdata(dev);
184 ret = acp_deinit(chip);
185 if (ret)
186 dev_err(dev, "ACP de-init failed\n");
187 return ret;
188 }
189
snd_acp_resume(struct device * dev)190 static int __maybe_unused snd_acp_resume(struct device *dev)
191 {
192 struct acp_chip_info *chip;
193 struct acp_dev_data *adata;
194 struct device child;
195 int ret;
196
197 chip = dev_get_drvdata(dev);
198 ret = acp_init(chip);
199 if (ret)
200 dev_err(dev, "ACP init failed\n");
201 if (chip->chip_pdev) {
202 child = chip->chip_pdev->dev;
203 adata = dev_get_drvdata(&child);
204 if (adata)
205 acp_enable_interrupts(adata);
206 }
207 return ret;
208 }
209
210 static const struct dev_pm_ops acp_pm_ops = {
211 SET_RUNTIME_PM_OPS(snd_acp_suspend, snd_acp_resume, NULL)
212 SET_SYSTEM_SLEEP_PM_OPS(snd_acp_suspend, snd_acp_resume)
213 };
214
acp_pci_remove(struct pci_dev * pci)215 static void acp_pci_remove(struct pci_dev *pci)
216 {
217 struct acp_chip_info *chip;
218 int ret;
219
220 chip = pci_get_drvdata(pci);
221 pm_runtime_forbid(&pci->dev);
222 pm_runtime_get_noresume(&pci->dev);
223 if (dmic_dev)
224 platform_device_unregister(dmic_dev);
225 if (pdev)
226 platform_device_unregister(pdev);
227 ret = acp_deinit(chip);
228 if (ret)
229 dev_err(&pci->dev, "ACP de-init failed\n");
230 }
231
232 /* PCI IDs */
233 static const struct pci_device_id acp_pci_ids[] = {
234 { PCI_DEVICE(PCI_VENDOR_ID_AMD, ACP_PCI_DEV_ID)},
235 { 0, }
236 };
237 MODULE_DEVICE_TABLE(pci, acp_pci_ids);
238
239 /* pci_driver definition */
240 static struct pci_driver snd_amd_acp_pci_driver = {
241 .name = KBUILD_MODNAME,
242 .id_table = acp_pci_ids,
243 .probe = acp_pci_probe,
244 .remove = acp_pci_remove,
245 .driver = {
246 .pm = &acp_pm_ops,
247 },
248 };
249 module_pci_driver(snd_amd_acp_pci_driver);
250
251 MODULE_DESCRIPTION("AMD ACP common PCI support");
252 MODULE_LICENSE("Dual BSD/GPL");
253 MODULE_IMPORT_NS("SND_SOC_ACP_COMMON");
254 MODULE_ALIAS(DRV_NAME);
255