1 // SPDX-License-Identifier: GPL-2.0+
5 //Copyright 2016 Advanced Micro Devices, Inc.
8 #include <linux/module.h>
10 #include <linux/platform_device.h>
11 #include <linux/interrupt.h>
12 #include <linux/pm_runtime.h>
13 #include <linux/delay.h>
17 struct acp3x_dev_data {
18 void __iomem *acp3x_base;
19 bool acp3x_audio_mode;
21 struct platform_device *pdev[ACP3x_DEVS];
25 static int acp3x_power_on(struct acp3x_dev_data *adata)
27 void __iomem *acp3x_base = adata->acp3x_base;
31 val = rv_readl(acp3x_base + mmACP_PGFSM_STATUS);
36 if (!((val & ACP_PGFSM_STATUS_MASK) ==
37 ACP_POWER_ON_IN_PROGRESS))
38 rv_writel(ACP_PGFSM_CNTL_POWER_ON_MASK,
39 acp3x_base + mmACP_PGFSM_CONTROL);
41 while (++timeout < 500) {
42 val = rv_readl(acp3x_base + mmACP_PGFSM_STATUS);
44 /* ACP power On clears PME_EN.
45 * Restore the value to its prior state
47 rv_writel(adata->pme_en, acp3x_base + mmACP_PME_EN);
55 static int acp3x_reset(void __iomem *acp3x_base)
60 rv_writel(1, acp3x_base + mmACP_SOFT_RESET);
62 while (++timeout < 500) {
63 val = rv_readl(acp3x_base + mmACP_SOFT_RESET);
64 if (val & ACP3x_SOFT_RESET__SoftResetAudDone_MASK)
68 rv_writel(0, acp3x_base + mmACP_SOFT_RESET);
70 while (++timeout < 500) {
71 val = rv_readl(acp3x_base + mmACP_SOFT_RESET);
79 static int acp3x_init(struct acp3x_dev_data *adata)
81 void __iomem *acp3x_base = adata->acp3x_base;
85 ret = acp3x_power_on(adata);
87 pr_err("ACP3x power on failed\n");
91 ret = acp3x_reset(acp3x_base);
93 pr_err("ACP3x reset failed\n");
99 static int acp3x_deinit(void __iomem *acp3x_base)
104 ret = acp3x_reset(acp3x_base);
106 pr_err("ACP3x reset failed\n");
112 static int snd_acp3x_probe(struct pci_dev *pci,
113 const struct pci_device_id *pci_id)
115 struct acp3x_dev_data *adata;
116 struct platform_device_info pdevinfo[ACP3x_DEVS];
117 unsigned int irqflags;
121 if (pci_enable_device(pci)) {
122 dev_err(&pci->dev, "pci_enable_device failed\n");
126 ret = pci_request_regions(pci, "AMD ACP3x audio");
128 dev_err(&pci->dev, "pci_request_regions failed\n");
132 adata = devm_kzalloc(&pci->dev, sizeof(struct acp3x_dev_data),
136 goto release_regions;
139 /* check for msi interrupt support */
140 ret = pci_enable_msi(pci);
142 /* msi is not enabled */
143 irqflags = IRQF_SHARED;
148 addr = pci_resource_start(pci, 0);
149 adata->acp3x_base = devm_ioremap(&pci->dev, addr,
150 pci_resource_len(pci, 0));
151 if (!adata->acp3x_base) {
156 pci_set_drvdata(pci, adata);
157 /* Save ACP_PME_EN state */
158 adata->pme_en = rv_readl(adata->acp3x_base + mmACP_PME_EN);
159 ret = acp3x_init(adata);
163 val = rv_readl(adata->acp3x_base + mmACP_I2S_PIN_CONFIG);
166 adata->res = devm_kzalloc(&pci->dev,
167 sizeof(struct resource) * 4,
174 adata->res[0].name = "acp3x_i2s_iomem";
175 adata->res[0].flags = IORESOURCE_MEM;
176 adata->res[0].start = addr;
177 adata->res[0].end = addr + (ACP3x_REG_END - ACP3x_REG_START);
179 adata->res[1].name = "acp3x_i2s_sp";
180 adata->res[1].flags = IORESOURCE_MEM;
181 adata->res[1].start = addr + ACP3x_I2STDM_REG_START;
182 adata->res[1].end = addr + ACP3x_I2STDM_REG_END;
184 adata->res[2].name = "acp3x_i2s_bt";
185 adata->res[2].flags = IORESOURCE_MEM;
186 adata->res[2].start = addr + ACP3x_BT_TDM_REG_START;
187 adata->res[2].end = addr + ACP3x_BT_TDM_REG_END;
189 adata->res[3].name = "acp3x_i2s_irq";
190 adata->res[3].flags = IORESOURCE_IRQ;
191 adata->res[3].start = pci->irq;
192 adata->res[3].end = adata->res[3].start;
194 adata->acp3x_audio_mode = ACP3x_I2S_MODE;
196 memset(&pdevinfo, 0, sizeof(pdevinfo));
197 pdevinfo[0].name = "acp3x_rv_i2s_dma";
199 pdevinfo[0].parent = &pci->dev;
200 pdevinfo[0].num_res = 4;
201 pdevinfo[0].res = &adata->res[0];
202 pdevinfo[0].data = &irqflags;
203 pdevinfo[0].size_data = sizeof(irqflags);
205 pdevinfo[1].name = "acp3x_i2s_playcap";
207 pdevinfo[1].parent = &pci->dev;
208 pdevinfo[1].num_res = 1;
209 pdevinfo[1].res = &adata->res[1];
211 pdevinfo[2].name = "acp3x_i2s_playcap";
213 pdevinfo[2].parent = &pci->dev;
214 pdevinfo[2].num_res = 1;
215 pdevinfo[2].res = &adata->res[1];
217 pdevinfo[3].name = "acp3x_i2s_playcap";
219 pdevinfo[3].parent = &pci->dev;
220 pdevinfo[3].num_res = 1;
221 pdevinfo[3].res = &adata->res[2];
222 for (i = 0; i < ACP3x_DEVS; i++) {
224 platform_device_register_full(&pdevinfo[i]);
225 if (IS_ERR(adata->pdev[i])) {
226 dev_err(&pci->dev, "cannot register %s device\n",
228 ret = PTR_ERR(adata->pdev[i]);
229 goto unregister_devs;
234 dev_err(&pci->dev, "Invalid ACP audio mode : %d\n", val);
238 pm_runtime_set_autosuspend_delay(&pci->dev, 2000);
239 pm_runtime_use_autosuspend(&pci->dev);
240 pm_runtime_put_noidle(&pci->dev);
241 pm_runtime_allow(&pci->dev);
246 for (i = 0; i < ACP3x_DEVS; i++)
247 platform_device_unregister(adata->pdev[i]);
249 if (acp3x_deinit(adata->acp3x_base))
250 dev_err(&pci->dev, "ACP de-init failed\n");
252 pci_disable_msi(pci);
254 pci_release_regions(pci);
256 pci_disable_device(pci);
261 static int snd_acp3x_suspend(struct device *dev)
264 struct acp3x_dev_data *adata;
266 adata = dev_get_drvdata(dev);
267 ret = acp3x_deinit(adata->acp3x_base);
269 dev_err(dev, "ACP de-init failed\n");
271 dev_dbg(dev, "ACP de-initialized\n");
276 static int snd_acp3x_resume(struct device *dev)
279 struct acp3x_dev_data *adata;
281 adata = dev_get_drvdata(dev);
282 ret = acp3x_init(adata);
284 dev_err(dev, "ACP init failed\n");
290 static const struct dev_pm_ops acp3x_pm = {
291 .runtime_suspend = snd_acp3x_suspend,
292 .runtime_resume = snd_acp3x_resume,
293 .resume = snd_acp3x_resume,
296 static void snd_acp3x_remove(struct pci_dev *pci)
298 struct acp3x_dev_data *adata;
301 adata = pci_get_drvdata(pci);
302 if (adata->acp3x_audio_mode == ACP3x_I2S_MODE) {
303 for (i = 0; i < ACP3x_DEVS; i++)
304 platform_device_unregister(adata->pdev[i]);
306 ret = acp3x_deinit(adata->acp3x_base);
308 dev_err(&pci->dev, "ACP de-init failed\n");
309 pm_runtime_forbid(&pci->dev);
310 pm_runtime_get_noresume(&pci->dev);
311 pci_disable_msi(pci);
312 pci_release_regions(pci);
313 pci_disable_device(pci);
316 static const struct pci_device_id snd_acp3x_ids[] = {
317 { PCI_DEVICE(PCI_VENDOR_ID_AMD, 0x15e2),
318 .class = PCI_CLASS_MULTIMEDIA_OTHER << 8,
319 .class_mask = 0xffffff },
322 MODULE_DEVICE_TABLE(pci, snd_acp3x_ids);
324 static struct pci_driver acp3x_driver = {
325 .name = KBUILD_MODNAME,
326 .id_table = snd_acp3x_ids,
327 .probe = snd_acp3x_probe,
328 .remove = snd_acp3x_remove,
334 module_pci_driver(acp3x_driver);
336 MODULE_AUTHOR("Vishnuvardhanrao.Ravulapati@amd.com");
337 MODULE_AUTHOR("Maruthi.Bayyavarapu@amd.com");
338 MODULE_DESCRIPTION("AMD ACP3x PCI driver");
339 MODULE_LICENSE("GPL v2");