acp-pci.c

  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(&pci->dev, 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, parent, NULL, chip->name,
 79				   0, chip->res, 1, chip, sizeof(*chip));
 80
 81	chip->acp_plat_dev = platform_device_register_full(&pdevinfo);
 82	if (IS_ERR(chip->acp_plat_dev)) {
 83		dev_err(&pci->dev,
 84			"cannot register %s device\n", pdevinfo.name);
 85		ret = PTR_ERR(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(&pci->dev,
 90								     "dmic-codec",
 91								     PLATFORM_DEVID_NONE,
 92								     NULL, 0);
 93		if (IS_ERR(chip->dmic_codec_dev)) {
 94			dev_err(&pci->dev, "failed to create DMIC device\n");
 95			ret = PTR_ERR(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(&pci->dev, sizeof(*chip), GFP_KERNEL);
118	if (!chip)
119		return -ENOMEM;
120
121	if (pci_enable_device(pci))
122		return dev_err_probe(&pci->dev, -ENODEV,
123				     "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(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(&pci->dev, 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, pci->irq, irq_handler,
184			       IRQF_SHARED, "ACP_I2S_IRQ", 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(&chip->stream_list);
206	spin_lock_init(&chip->acp_lock);
207skip_pdev_creation:
208	dev_set_drvdata(&pci->dev, chip);
209	pm_runtime_set_autosuspend_delay(&pci->dev, 2000);
210	pm_runtime_use_autosuspend(&pci->dev);
211	pm_runtime_put_noidle(&pci->dev);
212	pm_runtime_allow(&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(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(pci);
265	pm_runtime_forbid(&pci->dev);
266	pm_runtime_get_noresume(&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);