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
29static irqreturn_t irq_handler(int irq, void *data)
30{
31 struct acp_chip_info *chip = data;
32
33 if (chip && chip->acp_hw_ops && chip->acp_hw_ops->irq)
34 return chip->acp_hw_ops->irq(irq, chip);
35
36 return IRQ_NONE;
37}
38static void acp_fill_platform_dev_info(struct platform_device_info *pdevinfo,
39 struct device *parent,
40 struct fwnode_handle *fw_node,
41 char *name, unsigned int id,
42 const struct resource *res,
43 unsigned int num_res,
44 const void *data,
45 size_t size_data)
46{
47 pdevinfo->name = name;
48 pdevinfo->id = id;
49 pdevinfo->parent = parent;
50 pdevinfo->num_res = num_res;
51 pdevinfo->res = res;
52 pdevinfo->data = data;
53 pdevinfo->size_data = size_data;
54 pdevinfo->fwnode = fw_node;
55}
56
57static int create_acp_platform_devs(struct pci_dev *pci, struct acp_chip_info *chip, u32 addr)
58{
59 struct platform_device_info pdevinfo;
60 struct device *parent;
61 int ret;
62
63 parent = &pci->dev;
64
65 if (chip->is_i2s_config || chip->is_pdm_dev) {
66 chip->res = devm_kzalloc(dev: &pci->dev, size: sizeof(struct resource), GFP_KERNEL);
67 if (!chip->res) {
68 ret = -ENOMEM;
69 goto err;
70 }
71 chip->res->flags = IORESOURCE_MEM;
72 chip->res->start = addr;
73 chip->res->end = addr + (ACP3x_REG_END - ACP3x_REG_START);
74 memset(&pdevinfo, 0, sizeof(pdevinfo));
75 }
76
77 memset(&pdevinfo, 0, sizeof(pdevinfo));
78 acp_fill_platform_dev_info(pdevinfo: &pdevinfo, parent, NULL, name: chip->name,
79 id: 0, res: chip->res, num_res: 1, data: chip, size_data: sizeof(*chip));
80
81 chip->acp_plat_dev = platform_device_register_full(pdevinfo: &pdevinfo);
82 if (IS_ERR(ptr: chip->acp_plat_dev)) {
83 dev_err(&pci->dev,
84 "cannot register %s device\n", pdevinfo.name);
85 ret = PTR_ERR(ptr: chip->acp_plat_dev);
86 goto err;
87 }
88 if (chip->is_pdm_dev && chip->is_pdm_config) {
89 chip->dmic_codec_dev = platform_device_register_data(parent: &pci->dev,
90 name: "dmic-codec",
91 PLATFORM_DEVID_NONE,
92 NULL, size: 0);
93 if (IS_ERR(ptr: chip->dmic_codec_dev)) {
94 dev_err(&pci->dev, "failed to create DMIC device\n");
95 ret = PTR_ERR(ptr: chip->dmic_codec_dev);
96 goto unregister_acp_plat_dev;
97 }
98 }
99 return 0;
100unregister_acp_plat_dev:
101 platform_device_unregister(chip->acp_plat_dev);
102err:
103 return ret;
104}
105
106static int acp_pci_probe(struct pci_dev *pci, const struct pci_device_id *pci_id)
107{
108 struct device *dev = &pci->dev;
109 struct acp_chip_info *chip;
110 unsigned int flag, addr;
111 int ret;
112
113 flag = snd_amd_acp_find_config(pci);
114 if (flag != FLAG_AMD_LEGACY && flag != FLAG_AMD_LEGACY_ONLY_DMIC)
115 return -ENODEV;
116
117 chip = devm_kzalloc(dev: &pci->dev, size: sizeof(*chip), GFP_KERNEL);
118 if (!chip)
119 return -ENOMEM;
120
121 if (pci_enable_device(dev: pci))
122 return dev_err_probe(dev: &pci->dev, err: -ENODEV,
123 fmt: "pci_enable_device failed\n");
124
125 ret = pci_request_regions(pci, "AMD ACP3x audio");
126 if (ret < 0) {
127 dev_err(&pci->dev, "pci_request_regions failed\n");
128 ret = -ENOMEM;
129 goto disable_pci;
130 }
131
132 pci_set_master(dev: pci);
133
134 chip->acp_rev = pci->revision;
135 switch (pci->revision) {
136 case 0x01:
137 chip->name = "acp_asoc_renoir";
138 chip->rsrc = &rn_rsrc;
139 chip->acp_hw_ops_init = acp31_hw_ops_init;
140 chip->machines = snd_soc_acpi_amd_acp_machines;
141 break;
142 case 0x6f:
143 chip->name = "acp_asoc_rembrandt";
144 chip->rsrc = &rmb_rsrc;
145 chip->acp_hw_ops_init = acp6x_hw_ops_init;
146 chip->machines = snd_soc_acpi_amd_rmb_acp_machines;
147 break;
148 case 0x63:
149 chip->name = "acp_asoc_acp63";
150 chip->rsrc = &acp63_rsrc;
151 chip->acp_hw_ops_init = acp63_hw_ops_init;
152 chip->machines = snd_soc_acpi_amd_acp63_acp_machines;
153 break;
154 case 0x70:
155 case 0x71:
156 case 0x72:
157 chip->name = "acp_asoc_acp70";
158 chip->rsrc = &acp70_rsrc;
159 chip->acp_hw_ops_init = acp70_hw_ops_init;
160 chip->machines = snd_soc_acpi_amd_acp70_acp_machines;
161 break;
162 default:
163 dev_err(dev, "Unsupported device revision:0x%x\n", pci->revision);
164 ret = -EINVAL;
165 goto release_regions;
166 }
167 chip->flag = flag;
168
169 addr = pci_resource_start(pci, 0);
170 chip->base = devm_ioremap(dev: &pci->dev, offset: addr, pci_resource_len(pci, 0));
171 if (!chip->base) {
172 ret = -ENOMEM;
173 goto release_regions;
174 }
175
176 chip->addr = addr;
177
178 chip->acp_hw_ops_init(chip);
179 ret = acp_hw_init(chip);
180 if (ret)
181 goto release_regions;
182
183 ret = devm_request_irq(dev, irq: pci->irq, handler: irq_handler,
184 IRQF_SHARED, devname: "ACP_I2S_IRQ", dev_id: chip);
185 if (ret) {
186 dev_err(&pci->dev, "ACP I2S IRQ request failed %d\n", ret);
187 goto de_init;
188 }
189
190 check_acp_config(pci, chip);
191 if (!chip->is_pdm_dev && !chip->is_i2s_config)
192 goto skip_pdev_creation;
193
194 ret = create_acp_platform_devs(pci, chip, addr);
195 if (ret < 0) {
196 dev_err(&pci->dev, "ACP platform devices creation failed\n");
197 goto de_init;
198 }
199
200 chip->chip_pdev = chip->acp_plat_dev;
201 chip->dev = &chip->acp_plat_dev->dev;
202
203 acp_machine_select(chip);
204
205 INIT_LIST_HEAD(list: &chip->stream_list);
206 spin_lock_init(&chip->acp_lock);
207skip_pdev_creation:
208 dev_set_drvdata(dev: &pci->dev, data: chip);
209 pm_runtime_set_autosuspend_delay(dev: &pci->dev, delay: 2000);
210 pm_runtime_use_autosuspend(dev: &pci->dev);
211 pm_runtime_put_noidle(dev: &pci->dev);
212 pm_runtime_allow(dev: &pci->dev);
213 return ret;
214
215de_init:
216 acp_hw_deinit(chip);
217release_regions:
218 pci_release_regions(pci);
219disable_pci:
220 pci_disable_device(dev: pci);
221
222 return ret;
223};
224
225static int snd_acp_suspend(struct device *dev)
226{
227 struct acp_chip_info *chip;
228 int ret;
229
230 chip = dev_get_drvdata(dev);
231 ret = acp_hw_deinit(chip);
232 if (ret)
233 dev_err(dev, "ACP de-init failed\n");
234 return ret;
235}
236
237static int snd_acp_resume(struct device *dev)
238{
239 struct acp_chip_info *chip;
240 int ret;
241
242 chip = dev_get_drvdata(dev);
243 ret = acp_hw_init(chip);
244 if (ret)
245 dev_err(dev, "ACP init failed\n");
246
247 ret = acp_hw_en_interrupts(chip);
248 if (ret)
249 dev_err(dev, "ACP en-interrupts failed\n");
250
251 return ret;
252}
253
254static const struct dev_pm_ops acp_pm_ops = {
255 RUNTIME_PM_OPS(snd_acp_suspend, snd_acp_resume, NULL)
256 SYSTEM_SLEEP_PM_OPS(snd_acp_suspend, snd_acp_resume)
257};
258
259static void acp_pci_remove(struct pci_dev *pci)
260{
261 struct acp_chip_info *chip;
262 int ret;
263
264 chip = pci_get_drvdata(pdev: pci);
265 pm_runtime_forbid(dev: &pci->dev);
266 pm_runtime_get_noresume(dev: &pci->dev);
267 if (chip->dmic_codec_dev)
268 platform_device_unregister(chip->dmic_codec_dev);
269 if (chip->acp_plat_dev)
270 platform_device_unregister(chip->acp_plat_dev);
271 if (chip->mach_dev)
272 platform_device_unregister(chip->mach_dev);
273
274 ret = acp_hw_deinit(chip);
275 if (ret)
276 dev_err(&pci->dev, "ACP de-init failed\n");
277}
278
279/* PCI IDs */
280static const struct pci_device_id acp_pci_ids[] = {
281 { PCI_DEVICE(PCI_VENDOR_ID_AMD, ACP_PCI_DEV_ID)},
282 { 0, }
283};
284MODULE_DEVICE_TABLE(pci, acp_pci_ids);
285
286/* pci_driver definition */
287static struct pci_driver snd_amd_acp_pci_driver = {
288 .name = KBUILD_MODNAME,
289 .id_table = acp_pci_ids,
290 .probe = acp_pci_probe,
291 .remove = acp_pci_remove,
292 .driver = {
293 .pm = pm_ptr(&acp_pm_ops),
294 },
295};
296module_pci_driver(snd_amd_acp_pci_driver);
297
298MODULE_DESCRIPTION("AMD ACP common PCI support");
299MODULE_LICENSE("Dual BSD/GPL");
300MODULE_IMPORT_NS("SND_SOC_ACP_COMMON");
301MODULE_ALIAS(DRV_NAME);
302

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