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7#include <linux/pci.h>
8#include <linux/module.h>
9#include <linux/io.h>
10#include <linux/delay.h>
11#include <linux/platform_device.h>
12#include <linux/interrupt.h>
13#include <linux/pm_runtime.h>
14
15#include "acp5x.h"
16
17struct acp5x_dev_data {
18 void __iomem *acp5x_base;
19 bool acp5x_audio_mode;
20 struct resource *res;
21 struct platform_device *pdev[ACP5x_DEVS];
22};
23
24static int acp5x_power_on(void __iomem *acp5x_base)
25{
26 u32 val;
27 int timeout;
28
29 val = acp_readl(acp5x_base + ACP_PGFSM_STATUS);
30
31 if (val == 0)
32 return val;
33
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);
38 timeout = 0;
39 while (++timeout < 500) {
40 val = acp_readl(acp5x_base + ACP_PGFSM_STATUS);
41 if ((val & ACP_PGFSM_STATUS_MASK) == ACP_POWERED_ON)
42 return 0;
43 udelay(1);
44 }
45 return -ETIMEDOUT;
46}
47
48static int acp5x_reset(void __iomem *acp5x_base)
49{
50 u32 val;
51 int timeout;
52
53 acp_writel(1, acp5x_base + ACP_SOFT_RESET);
54 timeout = 0;
55 while (++timeout < 500) {
56 val = acp_readl(acp5x_base + ACP_SOFT_RESET);
57 if (val & ACP_SOFT_RESET_SOFTRESET_AUDDONE_MASK)
58 break;
59 cpu_relax();
60 }
61 acp_writel(0, acp5x_base + ACP_SOFT_RESET);
62 timeout = 0;
63 while (++timeout < 500) {
64 val = acp_readl(acp5x_base + ACP_SOFT_RESET);
65 if (!val)
66 return 0;
67 cpu_relax();
68 }
69 return -ETIMEDOUT;
70}
71
72static void acp5x_enable_interrupts(void __iomem *acp5x_base)
73{
74 acp_writel(0x01, acp5x_base + ACP_EXTERNAL_INTR_ENB);
75}
76
77static void acp5x_disable_interrupts(void __iomem *acp5x_base)
78{
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);
83}
84
85static int acp5x_init(void __iomem *acp5x_base)
86{
87 int ret;
88
89
90 ret = acp5x_power_on(acp5x_base);
91 if (ret) {
92 pr_err("ACP5x power on failed\n");
93 return ret;
94 }
95
96 ret = acp5x_reset(acp5x_base);
97 if (ret) {
98 pr_err("ACP5x reset failed\n");
99 return ret;
100 }
101 acp5x_enable_interrupts(acp5x_base);
102 return 0;
103}
104
105static int acp5x_deinit(void __iomem *acp5x_base)
106{
107 int ret;
108
109 acp5x_disable_interrupts(acp5x_base);
110
111 ret = acp5x_reset(acp5x_base);
112 if (ret) {
113 pr_err("ACP5x reset failed\n");
114 return ret;
115 }
116 return 0;
117}
118
119static int snd_acp5x_probe(struct pci_dev *pci,
120 const struct pci_device_id *pci_id)
121{
122 struct acp5x_dev_data *adata;
123 struct platform_device_info pdevinfo[ACP5x_DEVS];
124 unsigned int irqflags;
125 int ret, i;
126 u32 addr, val;
127
128 irqflags = IRQF_SHARED;
129 if (pci->revision != 0x50)
130 return -ENODEV;
131
132 if (pci_enable_device(pci)) {
133 dev_err(&pci->dev, "pci_enable_device failed\n");
134 return -ENODEV;
135 }
136
137 ret = pci_request_regions(pci, "AMD ACP5x audio");
138 if (ret < 0) {
139 dev_err(&pci->dev, "pci_request_regions failed\n");
140 goto disable_pci;
141 }
142
143 adata = devm_kzalloc(&pci->dev, sizeof(struct acp5x_dev_data),
144 GFP_KERNEL);
145 if (!adata) {
146 ret = -ENOMEM;
147 goto release_regions;
148 }
149 addr = pci_resource_start(pci, 0);
150 adata->acp5x_base = devm_ioremap(&pci->dev, addr,
151 pci_resource_len(pci, 0));
152 if (!adata->acp5x_base) {
153 ret = -ENOMEM;
154 goto release_regions;
155 }
156 pci_set_master(pci);
157 pci_set_drvdata(pci, adata);
158 ret = acp5x_init(adata->acp5x_base);
159 if (ret)
160 goto release_regions;
161
162 val = acp_readl(adata->acp5x_base + ACP_PIN_CONFIG);
163 switch (val) {
164 case I2S_MODE:
165 adata->res = devm_kzalloc(&pci->dev,
166 sizeof(struct resource) * ACP5x_RES,
167 GFP_KERNEL);
168 if (!adata->res) {
169 ret = -ENOMEM;
170 goto de_init;
171 }
172
173 adata->res[0].name = "acp5x_i2s_iomem";
174 adata->res[0].flags = IORESOURCE_MEM;
175 adata->res[0].start = addr;
176 adata->res[0].end = addr + (ACP5x_REG_END - ACP5x_REG_START);
177
178 adata->res[1].name = "acp5x_i2s_sp";
179 adata->res[1].flags = IORESOURCE_MEM;
180 adata->res[1].start = addr + ACP5x_I2STDM_REG_START;
181 adata->res[1].end = addr + ACP5x_I2STDM_REG_END;
182
183 adata->res[2].name = "acp5x_i2s_hs";
184 adata->res[2].flags = IORESOURCE_MEM;
185 adata->res[2].start = addr + ACP5x_HS_TDM_REG_START;
186 adata->res[2].end = addr + ACP5x_HS_TDM_REG_END;
187
188 adata->res[3].name = "acp5x_i2s_irq";
189 adata->res[3].flags = IORESOURCE_IRQ;
190 adata->res[3].start = pci->irq;
191 adata->res[3].end = adata->res[3].start;
192
193 adata->acp5x_audio_mode = ACP5x_I2S_MODE;
194
195 memset(&pdevinfo, 0, sizeof(pdevinfo));
196 pdevinfo[0].name = "acp5x_i2s_dma";
197 pdevinfo[0].id = 0;
198 pdevinfo[0].parent = &pci->dev;
199 pdevinfo[0].num_res = 4;
200 pdevinfo[0].res = &adata->res[0];
201 pdevinfo[0].data = &irqflags;
202 pdevinfo[0].size_data = sizeof(irqflags);
203
204 pdevinfo[1].name = "acp5x_i2s_playcap";
205 pdevinfo[1].id = 0;
206 pdevinfo[1].parent = &pci->dev;
207 pdevinfo[1].num_res = 1;
208 pdevinfo[1].res = &adata->res[1];
209
210 pdevinfo[2].name = "acp5x_i2s_playcap";
211 pdevinfo[2].id = 1;
212 pdevinfo[2].parent = &pci->dev;
213 pdevinfo[2].num_res = 1;
214 pdevinfo[2].res = &adata->res[2];
215
216 for (i = 0; i < ACP5x_DEVS; i++) {
217 adata->pdev[i] =
218 platform_device_register_full(&pdevinfo[i]);
219 if (IS_ERR(adata->pdev[i])) {
220 dev_err(&pci->dev, "cannot register %s device\n",
221 pdevinfo[i].name);
222 ret = PTR_ERR(adata->pdev[i]);
223 goto unregister_devs;
224 }
225 }
226 break;
227 default:
228 dev_info(&pci->dev, "ACP audio mode : %d\n", val);
229 }
230 pm_runtime_set_autosuspend_delay(&pci->dev, 2000);
231 pm_runtime_use_autosuspend(&pci->dev);
232 pm_runtime_put_noidle(&pci->dev);
233 pm_runtime_allow(&pci->dev);
234 return 0;
235
236unregister_devs:
237 for (--i; i >= 0; i--)
238 platform_device_unregister(adata->pdev[i]);
239de_init:
240 if (acp5x_deinit(adata->acp5x_base))
241 dev_err(&pci->dev, "ACP de-init failed\n");
242release_regions:
243 pci_release_regions(pci);
244disable_pci:
245 pci_disable_device(pci);
246
247 return ret;
248}
249
250static int __maybe_unused snd_acp5x_suspend(struct device *dev)
251{
252 int ret;
253 struct acp5x_dev_data *adata;
254
255 adata = dev_get_drvdata(dev);
256 ret = acp5x_deinit(adata->acp5x_base);
257 if (ret)
258 dev_err(dev, "ACP de-init failed\n");
259 else
260 dev_dbg(dev, "ACP de-initialized\n");
261
262 return ret;
263}
264
265static int __maybe_unused snd_acp5x_resume(struct device *dev)
266{
267 int ret;
268 struct acp5x_dev_data *adata;
269
270 adata = dev_get_drvdata(dev);
271 ret = acp5x_init(adata->acp5x_base);
272 if (ret) {
273 dev_err(dev, "ACP init failed\n");
274 return ret;
275 }
276 return 0;
277}
278
279static const struct dev_pm_ops acp5x_pm = {
280 SET_RUNTIME_PM_OPS(snd_acp5x_suspend,
281 snd_acp5x_resume, NULL)
282 SET_SYSTEM_SLEEP_PM_OPS(snd_acp5x_suspend, snd_acp5x_resume)
283};
284
285static void snd_acp5x_remove(struct pci_dev *pci)
286{
287 struct acp5x_dev_data *adata;
288 int i, ret;
289
290 adata = pci_get_drvdata(pci);
291 if (adata->acp5x_audio_mode == ACP5x_I2S_MODE) {
292 for (i = 0; i < ACP5x_DEVS; i++)
293 platform_device_unregister(adata->pdev[i]);
294 }
295 ret = acp5x_deinit(adata->acp5x_base);
296 if (ret)
297 dev_err(&pci->dev, "ACP de-init failed\n");
298 pm_runtime_forbid(&pci->dev);
299 pm_runtime_get_noresume(&pci->dev);
300 pci_release_regions(pci);
301 pci_disable_device(pci);
302}
303
304static const struct pci_device_id snd_acp5x_ids[] = {
305 { PCI_DEVICE(PCI_VENDOR_ID_AMD, ACP_DEVICE_ID),
306 .class = PCI_CLASS_MULTIMEDIA_OTHER << 8,
307 .class_mask = 0xffffff },
308 { 0, },
309};
310MODULE_DEVICE_TABLE(pci, snd_acp5x_ids);
311
312static struct pci_driver acp5x_driver = {
313 .name = KBUILD_MODNAME,
314 .id_table = snd_acp5x_ids,
315 .probe = snd_acp5x_probe,
316 .remove = snd_acp5x_remove,
317 .driver = {
318 .pm = &acp5x_pm,
319 }
320};
321
322module_pci_driver(acp5x_driver);
323
324MODULE_AUTHOR("Vijendar.Mukunda@amd.com");
325MODULE_DESCRIPTION("AMD Vangogh ACP PCI driver");
326MODULE_LICENSE("GPL v2");
327
