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10#include <linux/acpi.h>
11#include <linux/export.h>
12#include <linux/interrupt.h>
13#include <linux/io.h>
14#include <linux/module.h>
15#include <linux/auxiliary_bus.h>
16#include <linux/pm_runtime.h>
17#include <linux/soundwire/sdw_intel.h>
18#include "cadence_master.h"
19#include "intel.h"
20
21static void intel_link_dev_release(struct device *dev)
22{
23 struct auxiliary_device *auxdev = to_auxiliary_dev(dev);
24 struct sdw_intel_link_dev *ldev = auxiliary_dev_to_sdw_intel_link_dev(auxdev);
25
26 kfree(ldev);
27}
28
29
30static struct sdw_intel_link_dev *intel_link_dev_register(struct sdw_intel_res *res,
31 struct sdw_intel_ctx *ctx,
32 struct fwnode_handle *fwnode,
33 const char *name,
34 int link_id)
35{
36 struct sdw_intel_link_dev *ldev;
37 struct sdw_intel_link_res *link;
38 struct auxiliary_device *auxdev;
39 int ret;
40
41 ldev = kzalloc(sizeof(*ldev), GFP_KERNEL);
42 if (!ldev)
43 return ERR_PTR(-ENOMEM);
44
45 auxdev = &ldev->auxdev;
46 auxdev->name = name;
47 auxdev->dev.parent = res->parent;
48 auxdev->dev.fwnode = fwnode;
49 auxdev->dev.release = intel_link_dev_release;
50
51
52 auxdev->id = link_id;
53
54
55
56
57
58
59 ctx->ldev[link_id] = ldev;
60
61
62 link = &ldev->link_res;
63 link->mmio_base = res->mmio_base;
64 link->registers = res->mmio_base + SDW_LINK_BASE
65 + (SDW_LINK_SIZE * link_id);
66 link->shim = res->mmio_base + res->shim_base;
67 link->alh = res->mmio_base + res->alh_base;
68
69 link->ops = res->ops;
70 link->dev = res->dev;
71
72 link->clock_stop_quirks = res->clock_stop_quirks;
73 link->shim_lock = &ctx->shim_lock;
74 link->shim_mask = &ctx->shim_mask;
75 link->link_mask = ctx->link_mask;
76
77
78 ret = auxiliary_device_init(auxdev);
79 if (ret < 0) {
80 dev_err(res->parent, "failed to initialize link dev %s link_id %d\n",
81 name, link_id);
82 kfree(ldev);
83 return ERR_PTR(ret);
84 }
85
86 ret = auxiliary_device_add(&ldev->auxdev);
87 if (ret < 0) {
88 dev_err(res->parent, "failed to add link dev %s link_id %d\n",
89 ldev->auxdev.name, link_id);
90
91 auxiliary_device_uninit(&ldev->auxdev);
92 return ERR_PTR(ret);
93 }
94
95 return ldev;
96}
97
98static void intel_link_dev_unregister(struct sdw_intel_link_dev *ldev)
99{
100 auxiliary_device_delete(&ldev->auxdev);
101 auxiliary_device_uninit(&ldev->auxdev);
102}
103
104static int sdw_intel_cleanup(struct sdw_intel_ctx *ctx)
105{
106 struct sdw_intel_link_dev *ldev;
107 u32 link_mask;
108 int i;
109
110 link_mask = ctx->link_mask;
111
112 for (i = 0; i < ctx->count; i++) {
113 if (!(link_mask & BIT(i)))
114 continue;
115
116 ldev = ctx->ldev[i];
117
118 pm_runtime_disable(&ldev->auxdev.dev);
119 if (!ldev->link_res.clock_stop_quirks)
120 pm_runtime_put_noidle(ldev->link_res.dev);
121
122 intel_link_dev_unregister(ldev);
123 }
124
125 return 0;
126}
127
128#define HDA_DSP_REG_ADSPIC2 (0x10)
129#define HDA_DSP_REG_ADSPIS2 (0x14)
130#define HDA_DSP_REG_ADSPIC2_SNDW BIT(5)
131
132
133
134
135
136
137void sdw_intel_enable_irq(void __iomem *mmio_base, bool enable)
138{
139 u32 val;
140
141 val = readl(mmio_base + HDA_DSP_REG_ADSPIC2);
142
143 if (enable)
144 val |= HDA_DSP_REG_ADSPIC2_SNDW;
145 else
146 val &= ~HDA_DSP_REG_ADSPIC2_SNDW;
147
148 writel(val, mmio_base + HDA_DSP_REG_ADSPIC2);
149}
150EXPORT_SYMBOL_NS(sdw_intel_enable_irq, SOUNDWIRE_INTEL_INIT);
151
152irqreturn_t sdw_intel_thread(int irq, void *dev_id)
153{
154 struct sdw_intel_ctx *ctx = dev_id;
155 struct sdw_intel_link_res *link;
156
157 list_for_each_entry(link, &ctx->link_list, list)
158 sdw_cdns_irq(irq, link->cdns);
159
160 sdw_intel_enable_irq(ctx->mmio_base, true);
161 return IRQ_HANDLED;
162}
163EXPORT_SYMBOL_NS(sdw_intel_thread, SOUNDWIRE_INTEL_INIT);
164
165static struct sdw_intel_ctx
166*sdw_intel_probe_controller(struct sdw_intel_res *res)
167{
168 struct sdw_intel_link_res *link;
169 struct sdw_intel_link_dev *ldev;
170 struct sdw_intel_ctx *ctx;
171 struct acpi_device *adev;
172 struct sdw_slave *slave;
173 struct list_head *node;
174 struct sdw_bus *bus;
175 u32 link_mask;
176 int num_slaves = 0;
177 int count;
178 int i;
179
180 if (!res)
181 return NULL;
182
183 if (acpi_bus_get_device(res->handle, &adev))
184 return NULL;
185
186 if (!res->count)
187 return NULL;
188
189 count = res->count;
190 dev_dbg(&adev->dev, "Creating %d SDW Link devices\n", count);
191
192
193
194
195
196
197
198 ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
199 if (!ctx)
200 return NULL;
201
202 ctx->count = count;
203
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208
209
210 ctx->ldev = kcalloc(ctx->count, sizeof(*ctx->ldev), GFP_KERNEL);
211 if (!ctx->ldev) {
212 kfree(ctx);
213 return NULL;
214 }
215
216 ctx->mmio_base = res->mmio_base;
217 ctx->shim_base = res->shim_base;
218 ctx->alh_base = res->alh_base;
219 ctx->link_mask = res->link_mask;
220 ctx->handle = res->handle;
221 mutex_init(&ctx->shim_lock);
222
223 link_mask = ctx->link_mask;
224
225 INIT_LIST_HEAD(&ctx->link_list);
226
227 for (i = 0; i < count; i++) {
228 if (!(link_mask & BIT(i)))
229 continue;
230
231
232
233
234
235
236
237
238 ldev = intel_link_dev_register(res,
239 ctx,
240 acpi_fwnode_handle(adev),
241 "link",
242 i);
243 if (IS_ERR(ldev))
244 goto err;
245
246 link = &ldev->link_res;
247 link->cdns = dev_get_drvdata(&ldev->auxdev.dev);
248
249 if (!link->cdns) {
250 dev_err(&adev->dev, "failed to get link->cdns\n");
251
252
253
254
255 i++;
256 goto err;
257 }
258 list_add_tail(&link->list, &ctx->link_list);
259 bus = &link->cdns->bus;
260
261 list_for_each(node, &bus->slaves)
262 num_slaves++;
263 }
264
265 ctx->ids = kcalloc(num_slaves, sizeof(*ctx->ids), GFP_KERNEL);
266 if (!ctx->ids)
267 goto err;
268
269 ctx->num_slaves = num_slaves;
270 i = 0;
271 list_for_each_entry(link, &ctx->link_list, list) {
272 bus = &link->cdns->bus;
273 list_for_each_entry(slave, &bus->slaves, node) {
274 ctx->ids[i].id = slave->id;
275 ctx->ids[i].link_id = bus->link_id;
276 i++;
277 }
278 }
279
280 return ctx;
281
282err:
283 while (i--) {
284 if (!(link_mask & BIT(i)))
285 continue;
286 ldev = ctx->ldev[i];
287 intel_link_dev_unregister(ldev);
288 }
289 kfree(ctx->ldev);
290 kfree(ctx);
291 return NULL;
292}
293
294static int
295sdw_intel_startup_controller(struct sdw_intel_ctx *ctx)
296{
297 struct acpi_device *adev;
298 struct sdw_intel_link_dev *ldev;
299 u32 caps;
300 u32 link_mask;
301 int i;
302
303 if (acpi_bus_get_device(ctx->handle, &adev))
304 return -EINVAL;
305
306
307 caps = ioread32(ctx->mmio_base + ctx->shim_base + SDW_SHIM_LCAP);
308 caps &= GENMASK(2, 0);
309
310
311 if (caps < ctx->count) {
312 dev_err(&adev->dev,
313 "BIOS master count is larger than hardware capabilities\n");
314 return -EINVAL;
315 }
316
317 if (!ctx->ldev)
318 return -EINVAL;
319
320 link_mask = ctx->link_mask;
321
322
323 for (i = 0; i < ctx->count; i++) {
324 if (!(link_mask & BIT(i)))
325 continue;
326
327 ldev = ctx->ldev[i];
328
329 intel_link_startup(&ldev->auxdev);
330
331 if (!ldev->link_res.clock_stop_quirks) {
332
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334
335
336
337
338 pm_runtime_get_noresume(ldev->link_res.dev);
339 }
340 }
341
342 return 0;
343}
344
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353
354
355struct sdw_intel_ctx
356*sdw_intel_probe(struct sdw_intel_res *res)
357{
358 return sdw_intel_probe_controller(res);
359}
360EXPORT_SYMBOL_NS(sdw_intel_probe, SOUNDWIRE_INTEL_INIT);
361
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364
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367
368
369int sdw_intel_startup(struct sdw_intel_ctx *ctx)
370{
371 return sdw_intel_startup_controller(ctx);
372}
373EXPORT_SYMBOL_NS(sdw_intel_startup, SOUNDWIRE_INTEL_INIT);
374
375
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377
378
379
380void sdw_intel_exit(struct sdw_intel_ctx *ctx)
381{
382 sdw_intel_cleanup(ctx);
383 kfree(ctx->ids);
384 kfree(ctx->ldev);
385 kfree(ctx);
386}
387EXPORT_SYMBOL_NS(sdw_intel_exit, SOUNDWIRE_INTEL_INIT);
388
389void sdw_intel_process_wakeen_event(struct sdw_intel_ctx *ctx)
390{
391 struct sdw_intel_link_dev *ldev;
392 u32 link_mask;
393 int i;
394
395 if (!ctx->ldev)
396 return;
397
398 link_mask = ctx->link_mask;
399
400
401 for (i = 0; i < ctx->count; i++) {
402 if (!(link_mask & BIT(i)))
403 continue;
404
405 ldev = ctx->ldev[i];
406
407 intel_link_process_wakeen_event(&ldev->auxdev);
408 }
409}
410EXPORT_SYMBOL_NS(sdw_intel_process_wakeen_event, SOUNDWIRE_INTEL_INIT);
411
412MODULE_LICENSE("Dual BSD/GPL");
413MODULE_DESCRIPTION("Intel Soundwire Init Library");
414