1 // SPDX-License-Identifier: GPL-2.0+
3 // AMD Vangogh ACP PCI Driver
5 // Copyright (C) 2021 Advanced Micro Devices, Inc. All rights reserved.
8 #include <linux/module.h>
10 #include <linux/delay.h>
11 #include <linux/platform_device.h>
12 #include <linux/interrupt.h>
13 #include <linux/pm_runtime.h>
17 struct acp5x_dev_data {
18 void __iomem *acp5x_base;
19 bool acp5x_audio_mode;
21 struct platform_device *pdev[ACP5x_DEVS];
24 static int acp5x_power_on(void __iomem *acp5x_base)
29 val = acp_readl(acp5x_base + ACP_PGFSM_STATUS);
34 if ((val & ACP_PGFSM_STATUS_MASK) !=
35 ACP_POWER_ON_IN_PROGRESS)
36 acp_writel(ACP_PGFSM_CNTL_POWER_ON_MASK,
37 acp5x_base + ACP_PGFSM_CONTROL);
39 while (++timeout < 500) {
40 val = acp_readl(acp5x_base + ACP_PGFSM_STATUS);
41 if ((val & ACP_PGFSM_STATUS_MASK) == ACP_POWERED_ON)
48 static int acp5x_reset(void __iomem *acp5x_base)
53 acp_writel(1, acp5x_base + ACP_SOFT_RESET);
55 while (++timeout < 500) {
56 val = acp_readl(acp5x_base + ACP_SOFT_RESET);
57 if (val & ACP_SOFT_RESET_SOFTRESET_AUDDONE_MASK)
61 acp_writel(0, acp5x_base + ACP_SOFT_RESET);
63 while (++timeout < 500) {
64 val = acp_readl(acp5x_base + ACP_SOFT_RESET);
72 static void acp5x_enable_interrupts(void __iomem *acp5x_base)
74 acp_writel(0x01, acp5x_base + ACP_EXTERNAL_INTR_ENB);
77 static void acp5x_disable_interrupts(void __iomem *acp5x_base)
79 acp_writel(ACP_EXT_INTR_STAT_CLEAR_MASK, acp5x_base +
80 ACP_EXTERNAL_INTR_STAT);
81 acp_writel(0x00, acp5x_base + ACP_EXTERNAL_INTR_CNTL);
82 acp_writel(0x00, acp5x_base + ACP_EXTERNAL_INTR_ENB);
85 static int acp5x_init(void __iomem *acp5x_base)
90 ret = acp5x_power_on(acp5x_base);
92 pr_err("ACP5x power on failed\n");
95 acp_writel(0x01, acp5x_base + ACP_CONTROL);
97 ret = acp5x_reset(acp5x_base);
99 pr_err("ACP5x reset failed\n");
102 acp_writel(0x03, acp5x_base + ACP_CLKMUX_SEL);
103 acp5x_enable_interrupts(acp5x_base);
107 static int acp5x_deinit(void __iomem *acp5x_base)
111 acp5x_disable_interrupts(acp5x_base);
113 ret = acp5x_reset(acp5x_base);
115 pr_err("ACP5x reset failed\n");
118 acp_writel(0x00, acp5x_base + ACP_CLKMUX_SEL);
119 acp_writel(0x00, acp5x_base + ACP_CONTROL);
123 static int snd_acp5x_probe(struct pci_dev *pci,
124 const struct pci_device_id *pci_id)
126 struct acp5x_dev_data *adata;
127 struct platform_device_info pdevinfo[ACP5x_DEVS];
128 unsigned int irqflags;
132 irqflags = IRQF_SHARED;
133 if (pci->revision != 0x50)
136 if (pci_enable_device(pci)) {
137 dev_err(&pci->dev, "pci_enable_device failed\n");
141 ret = pci_request_regions(pci, "AMD ACP5x audio");
143 dev_err(&pci->dev, "pci_request_regions failed\n");
147 adata = devm_kzalloc(&pci->dev, sizeof(struct acp5x_dev_data),
151 goto release_regions;
153 addr = pci_resource_start(pci, 0);
154 adata->acp5x_base = devm_ioremap(&pci->dev, addr,
155 pci_resource_len(pci, 0));
156 if (!adata->acp5x_base) {
158 goto release_regions;
161 pci_set_drvdata(pci, adata);
162 ret = acp5x_init(adata->acp5x_base);
164 goto release_regions;
166 val = acp_readl(adata->acp5x_base + ACP_PIN_CONFIG);
169 adata->res = devm_kzalloc(&pci->dev,
170 sizeof(struct resource) * ACP5x_RES,
177 adata->res[0].name = "acp5x_i2s_iomem";
178 adata->res[0].flags = IORESOURCE_MEM;
179 adata->res[0].start = addr;
180 adata->res[0].end = addr + (ACP5x_REG_END - ACP5x_REG_START);
182 adata->res[1].name = "acp5x_i2s_sp";
183 adata->res[1].flags = IORESOURCE_MEM;
184 adata->res[1].start = addr + ACP5x_I2STDM_REG_START;
185 adata->res[1].end = addr + ACP5x_I2STDM_REG_END;
187 adata->res[2].name = "acp5x_i2s_hs";
188 adata->res[2].flags = IORESOURCE_MEM;
189 adata->res[2].start = addr + ACP5x_HS_TDM_REG_START;
190 adata->res[2].end = addr + ACP5x_HS_TDM_REG_END;
192 adata->res[3].name = "acp5x_i2s_irq";
193 adata->res[3].flags = IORESOURCE_IRQ;
194 adata->res[3].start = pci->irq;
195 adata->res[3].end = adata->res[3].start;
197 adata->acp5x_audio_mode = ACP5x_I2S_MODE;
199 memset(&pdevinfo, 0, sizeof(pdevinfo));
200 pdevinfo[0].name = "acp5x_i2s_dma";
202 pdevinfo[0].parent = &pci->dev;
203 pdevinfo[0].num_res = 4;
204 pdevinfo[0].res = &adata->res[0];
205 pdevinfo[0].data = &irqflags;
206 pdevinfo[0].size_data = sizeof(irqflags);
208 pdevinfo[1].name = "acp5x_i2s_playcap";
210 pdevinfo[1].parent = &pci->dev;
211 pdevinfo[1].num_res = 1;
212 pdevinfo[1].res = &adata->res[1];
214 pdevinfo[2].name = "acp5x_i2s_playcap";
216 pdevinfo[2].parent = &pci->dev;
217 pdevinfo[2].num_res = 1;
218 pdevinfo[2].res = &adata->res[2];
220 pdevinfo[3].name = "acp5x_mach";
222 pdevinfo[3].parent = &pci->dev;
223 for (i = 0; i < ACP5x_DEVS; i++) {
225 platform_device_register_full(&pdevinfo[i]);
226 if (IS_ERR(adata->pdev[i])) {
227 dev_err(&pci->dev, "cannot register %s device\n",
229 ret = PTR_ERR(adata->pdev[i]);
230 goto unregister_devs;
235 dev_info(&pci->dev, "ACP audio mode : %d\n", val);
237 pm_runtime_set_autosuspend_delay(&pci->dev, 2000);
238 pm_runtime_use_autosuspend(&pci->dev);
239 pm_runtime_put_noidle(&pci->dev);
240 pm_runtime_allow(&pci->dev);
244 for (--i; i >= 0; i--)
245 platform_device_unregister(adata->pdev[i]);
247 if (acp5x_deinit(adata->acp5x_base))
248 dev_err(&pci->dev, "ACP de-init failed\n");
250 pci_release_regions(pci);
252 pci_disable_device(pci);
257 static int __maybe_unused snd_acp5x_suspend(struct device *dev)
260 struct acp5x_dev_data *adata;
262 adata = dev_get_drvdata(dev);
263 ret = acp5x_deinit(adata->acp5x_base);
265 dev_err(dev, "ACP de-init failed\n");
267 dev_dbg(dev, "ACP de-initialized\n");
272 static int __maybe_unused snd_acp5x_resume(struct device *dev)
275 struct acp5x_dev_data *adata;
277 adata = dev_get_drvdata(dev);
278 ret = acp5x_init(adata->acp5x_base);
280 dev_err(dev, "ACP init failed\n");
286 static const struct dev_pm_ops acp5x_pm = {
287 SET_RUNTIME_PM_OPS(snd_acp5x_suspend,
288 snd_acp5x_resume, NULL)
289 SET_SYSTEM_SLEEP_PM_OPS(snd_acp5x_suspend, snd_acp5x_resume)
292 static void snd_acp5x_remove(struct pci_dev *pci)
294 struct acp5x_dev_data *adata;
297 adata = pci_get_drvdata(pci);
298 if (adata->acp5x_audio_mode == ACP5x_I2S_MODE) {
299 for (i = 0; i < ACP5x_DEVS; i++)
300 platform_device_unregister(adata->pdev[i]);
302 ret = acp5x_deinit(adata->acp5x_base);
304 dev_err(&pci->dev, "ACP de-init failed\n");
305 pm_runtime_forbid(&pci->dev);
306 pm_runtime_get_noresume(&pci->dev);
307 pci_release_regions(pci);
308 pci_disable_device(pci);
311 static const struct pci_device_id snd_acp5x_ids[] = {
312 { PCI_DEVICE(PCI_VENDOR_ID_AMD, ACP_DEVICE_ID),
313 .class = PCI_CLASS_MULTIMEDIA_OTHER << 8,
314 .class_mask = 0xffffff },
317 MODULE_DEVICE_TABLE(pci, snd_acp5x_ids);
319 static struct pci_driver acp5x_driver = {
320 .name = KBUILD_MODNAME,
321 .id_table = snd_acp5x_ids,
322 .probe = snd_acp5x_probe,
323 .remove = snd_acp5x_remove,
329 module_pci_driver(acp5x_driver);
331 MODULE_AUTHOR("Vijendar.Mukunda@amd.com");
332 MODULE_DESCRIPTION("AMD Vangogh ACP PCI driver");
333 MODULE_LICENSE("GPL v2");