Commit | Line | Data |
---|---|---|
d62a7d41 VK |
1 | // SPDX-License-Identifier: (GPL-2.0 OR BSD-3-Clause) |
2 | // Copyright(c) 2015-17 Intel Corporation. | |
3 | ||
4 | /* | |
5 | * SDW Intel Init Routines | |
6 | * | |
7 | * Initializes and creates SDW devices based on ACPI and Hardware values | |
8 | */ | |
9 | ||
10 | #include <linux/acpi.h> | |
4abbd783 | 11 | #include <linux/export.h> |
4a98a6b2 | 12 | #include <linux/interrupt.h> |
3fc40449 | 13 | #include <linux/io.h> |
4abbd783 | 14 | #include <linux/module.h> |
29a269c6 | 15 | #include <linux/auxiliary_bus.h> |
ebf878ed | 16 | #include <linux/pm_runtime.h> |
d62a7d41 | 17 | #include <linux/soundwire/sdw_intel.h> |
b6109dd6 | 18 | #include "cadence_master.h" |
4cd5ea6d | 19 | #include "bus.h" |
d62a7d41 | 20 | #include "intel.h" |
7cbf00bd | 21 | #include "intel_auxdevice.h" |
d62a7d41 | 22 | |
29a269c6 PLB |
23 | static void intel_link_dev_release(struct device *dev) |
24 | { | |
25 | struct auxiliary_device *auxdev = to_auxiliary_dev(dev); | |
26 | struct sdw_intel_link_dev *ldev = auxiliary_dev_to_sdw_intel_link_dev(auxdev); | |
27 | ||
28 | kfree(ldev); | |
29 | } | |
30 | ||
31 | /* alloc, init and add link devices */ | |
32 | static struct sdw_intel_link_dev *intel_link_dev_register(struct sdw_intel_res *res, | |
33 | struct sdw_intel_ctx *ctx, | |
34 | struct fwnode_handle *fwnode, | |
35 | const char *name, | |
36 | int link_id) | |
37 | { | |
38 | struct sdw_intel_link_dev *ldev; | |
39 | struct sdw_intel_link_res *link; | |
40 | struct auxiliary_device *auxdev; | |
41 | int ret; | |
42 | ||
43 | ldev = kzalloc(sizeof(*ldev), GFP_KERNEL); | |
44 | if (!ldev) | |
45 | return ERR_PTR(-ENOMEM); | |
46 | ||
47 | auxdev = &ldev->auxdev; | |
48 | auxdev->name = name; | |
49 | auxdev->dev.parent = res->parent; | |
50 | auxdev->dev.fwnode = fwnode; | |
51 | auxdev->dev.release = intel_link_dev_release; | |
52 | ||
53 | /* we don't use an IDA since we already have a link ID */ | |
54 | auxdev->id = link_id; | |
55 | ||
56 | /* | |
57 | * keep a handle on the allocated memory, to be used in all other functions. | |
58 | * Since the same pattern is used to skip links that are not enabled, there is | |
59 | * no need to check if ctx->ldev[i] is NULL later on. | |
60 | */ | |
61 | ctx->ldev[link_id] = ldev; | |
62 | ||
63 | /* Add link information used in the driver probe */ | |
64 | link = &ldev->link_res; | |
b3ad31f3 | 65 | link->hw_ops = res->hw_ops; |
29a269c6 | 66 | link->mmio_base = res->mmio_base; |
6ab915b9 PLB |
67 | if (!res->ext) { |
68 | link->registers = res->mmio_base + SDW_LINK_BASE | |
69 | + (SDW_LINK_SIZE * link_id); | |
e40e0e11 | 70 | link->ip_offset = 0; |
6ab915b9 PLB |
71 | link->shim = res->mmio_base + res->shim_base; |
72 | link->alh = res->mmio_base + res->alh_base; | |
e52cae0b | 73 | link->shim_lock = &ctx->shim_lock; |
6ab915b9 PLB |
74 | } else { |
75 | link->registers = res->mmio_base + SDW_IP_BASE(link_id); | |
e40e0e11 | 76 | link->ip_offset = SDW_CADENCE_MCP_IP_OFFSET; |
6ab915b9 PLB |
77 | link->shim = res->mmio_base + SDW_SHIM2_GENERIC_BASE(link_id); |
78 | link->shim_vs = res->mmio_base + SDW_SHIM2_VS_BASE(link_id); | |
e52cae0b | 79 | link->shim_lock = res->eml_lock; |
6ab915b9 | 80 | } |
29a269c6 PLB |
81 | |
82 | link->ops = res->ops; | |
83 | link->dev = res->dev; | |
84 | ||
85 | link->clock_stop_quirks = res->clock_stop_quirks; | |
29a269c6 PLB |
86 | link->shim_mask = &ctx->shim_mask; |
87 | link->link_mask = ctx->link_mask; | |
88 | ||
881cf1e9 PLB |
89 | link->hbus = res->hbus; |
90 | ||
29a269c6 PLB |
91 | /* now follow the two-step init/add sequence */ |
92 | ret = auxiliary_device_init(auxdev); | |
93 | if (ret < 0) { | |
94 | dev_err(res->parent, "failed to initialize link dev %s link_id %d\n", | |
95 | name, link_id); | |
96 | kfree(ldev); | |
97 | return ERR_PTR(ret); | |
98 | } | |
99 | ||
100 | ret = auxiliary_device_add(&ldev->auxdev); | |
101 | if (ret < 0) { | |
102 | dev_err(res->parent, "failed to add link dev %s link_id %d\n", | |
103 | ldev->auxdev.name, link_id); | |
104 | /* ldev will be freed with the put_device() and .release sequence */ | |
105 | auxiliary_device_uninit(&ldev->auxdev); | |
106 | return ERR_PTR(ret); | |
107 | } | |
108 | ||
109 | return ldev; | |
110 | } | |
111 | ||
112 | static void intel_link_dev_unregister(struct sdw_intel_link_dev *ldev) | |
113 | { | |
114 | auxiliary_device_delete(&ldev->auxdev); | |
115 | auxiliary_device_uninit(&ldev->auxdev); | |
116 | } | |
117 | ||
6d2c6669 | 118 | static int sdw_intel_cleanup(struct sdw_intel_ctx *ctx) |
d62a7d41 | 119 | { |
29a269c6 | 120 | struct sdw_intel_link_dev *ldev; |
6d2c6669 | 121 | u32 link_mask; |
d62a7d41 VK |
122 | int i; |
123 | ||
6d2c6669 PLB |
124 | link_mask = ctx->link_mask; |
125 | ||
29a269c6 | 126 | for (i = 0; i < ctx->count; i++) { |
6d2c6669 PLB |
127 | if (!(link_mask & BIT(i))) |
128 | continue; | |
129 | ||
29a269c6 | 130 | ldev = ctx->ldev[i]; |
ab996b29 | 131 | |
29a269c6 PLB |
132 | pm_runtime_disable(&ldev->auxdev.dev); |
133 | if (!ldev->link_res.clock_stop_quirks) | |
134 | pm_runtime_put_noidle(ldev->link_res.dev); | |
135 | ||
136 | intel_link_dev_unregister(ldev); | |
d62a7d41 VK |
137 | } |
138 | ||
d62a7d41 VK |
139 | return 0; |
140 | } | |
141 | ||
4a98a6b2 BL |
142 | irqreturn_t sdw_intel_thread(int irq, void *dev_id) |
143 | { | |
144 | struct sdw_intel_ctx *ctx = dev_id; | |
145 | struct sdw_intel_link_res *link; | |
146 | ||
147 | list_for_each_entry(link, &ctx->link_list, list) | |
148 | sdw_cdns_irq(irq, link->cdns); | |
149 | ||
4a98a6b2 BL |
150 | return IRQ_HANDLED; |
151 | } | |
152 | EXPORT_SYMBOL_NS(sdw_intel_thread, SOUNDWIRE_INTEL_INIT); | |
153 | ||
6d2c6669 PLB |
154 | static struct sdw_intel_ctx |
155 | *sdw_intel_probe_controller(struct sdw_intel_res *res) | |
156 | { | |
6d2c6669 | 157 | struct sdw_intel_link_res *link; |
29a269c6 | 158 | struct sdw_intel_link_dev *ldev; |
6d2c6669 PLB |
159 | struct sdw_intel_ctx *ctx; |
160 | struct acpi_device *adev; | |
a8184403 BL |
161 | struct sdw_slave *slave; |
162 | struct list_head *node; | |
163 | struct sdw_bus *bus; | |
6d2c6669 | 164 | u32 link_mask; |
a8184403 | 165 | int num_slaves = 0; |
6d2c6669 PLB |
166 | int count; |
167 | int i; | |
168 | ||
169 | if (!res) | |
170 | return NULL; | |
171 | ||
8733729e RW |
172 | adev = acpi_fetch_acpi_dev(res->handle); |
173 | if (!adev) | |
6d2c6669 PLB |
174 | return NULL; |
175 | ||
176 | if (!res->count) | |
177 | return NULL; | |
178 | ||
179 | count = res->count; | |
d62a7d41 VK |
180 | dev_dbg(&adev->dev, "Creating %d SDW Link devices\n", count); |
181 | ||
29a269c6 PLB |
182 | /* |
183 | * we need to alloc/free memory manually and can't use devm: | |
184 | * this routine may be called from a workqueue, and not from | |
185 | * the parent .probe. | |
186 | * If devm_ was used, the memory might never be freed on errors. | |
187 | */ | |
188 | ctx = kzalloc(sizeof(*ctx), GFP_KERNEL); | |
d62a7d41 VK |
189 | if (!ctx) |
190 | return NULL; | |
191 | ||
192 | ctx->count = count; | |
29a269c6 PLB |
193 | |
194 | /* | |
195 | * allocate the array of pointers. The link-specific data is allocated | |
196 | * as part of the first loop below and released with the auxiliary_device_uninit(). | |
197 | * If some links are disabled, the link pointer will remain NULL. Given that the | |
198 | * number of links is small, this is simpler than using a list to keep track of links. | |
199 | */ | |
200 | ctx->ldev = kcalloc(ctx->count, sizeof(*ctx->ldev), GFP_KERNEL); | |
201 | if (!ctx->ldev) { | |
202 | kfree(ctx); | |
dd906cc6 | 203 | return NULL; |
29a269c6 | 204 | } |
d62a7d41 | 205 | |
6d2c6669 | 206 | ctx->mmio_base = res->mmio_base; |
60e9feb7 BL |
207 | ctx->shim_base = res->shim_base; |
208 | ctx->alh_base = res->alh_base; | |
6d2c6669 PLB |
209 | ctx->link_mask = res->link_mask; |
210 | ctx->handle = res->handle; | |
4a17c441 | 211 | mutex_init(&ctx->shim_lock); |
6d2c6669 | 212 | |
6d2c6669 | 213 | link_mask = ctx->link_mask; |
d62a7d41 | 214 | |
4a98a6b2 BL |
215 | INIT_LIST_HEAD(&ctx->link_list); |
216 | ||
29a269c6 PLB |
217 | for (i = 0; i < count; i++) { |
218 | if (!(link_mask & BIT(i))) | |
50302fc7 | 219 | continue; |
50302fc7 | 220 | |
29a269c6 PLB |
221 | /* |
222 | * init and add a device for each link | |
223 | * | |
224 | * The name of the device will be soundwire_intel.link.[i], | |
225 | * with the "soundwire_intel" module prefix automatically added | |
226 | * by the auxiliary bus core. | |
227 | */ | |
228 | ldev = intel_link_dev_register(res, | |
229 | ctx, | |
230 | acpi_fwnode_handle(adev), | |
231 | "link", | |
232 | i); | |
233 | if (IS_ERR(ldev)) | |
6d2c6669 | 234 | goto err; |
29a269c6 PLB |
235 | |
236 | link = &ldev->link_res; | |
3edac08e | 237 | link->cdns = auxiliary_get_drvdata(&ldev->auxdev); |
4a98a6b2 | 238 | |
14968dd3 BL |
239 | if (!link->cdns) { |
240 | dev_err(&adev->dev, "failed to get link->cdns\n"); | |
241 | /* | |
242 | * 1 will be subtracted from i in the err label, but we need to call | |
243 | * intel_link_dev_unregister for this ldev, so plus 1 now | |
244 | */ | |
245 | i++; | |
246 | goto err; | |
247 | } | |
4a98a6b2 | 248 | list_add_tail(&link->list, &ctx->link_list); |
a8184403 BL |
249 | bus = &link->cdns->bus; |
250 | /* Calculate number of slaves */ | |
251 | list_for_each(node, &bus->slaves) | |
252 | num_slaves++; | |
253 | } | |
254 | ||
29a269c6 | 255 | ctx->ids = kcalloc(num_slaves, sizeof(*ctx->ids), GFP_KERNEL); |
a8184403 BL |
256 | if (!ctx->ids) |
257 | goto err; | |
258 | ||
259 | ctx->num_slaves = num_slaves; | |
260 | i = 0; | |
261 | list_for_each_entry(link, &ctx->link_list, list) { | |
262 | bus = &link->cdns->bus; | |
263 | list_for_each_entry(slave, &bus->slaves, node) { | |
264 | ctx->ids[i].id = slave->id; | |
265 | ctx->ids[i].link_id = bus->link_id; | |
266 | i++; | |
267 | } | |
d62a7d41 VK |
268 | } |
269 | ||
270 | return ctx; | |
271 | ||
6d2c6669 | 272 | err: |
29a269c6 PLB |
273 | while (i--) { |
274 | if (!(link_mask & BIT(i))) | |
275 | continue; | |
276 | ldev = ctx->ldev[i]; | |
277 | intel_link_dev_unregister(ldev); | |
278 | } | |
279 | kfree(ctx->ldev); | |
280 | kfree(ctx); | |
d62a7d41 VK |
281 | return NULL; |
282 | } | |
283 | ||
6d2c6669 PLB |
284 | static int |
285 | sdw_intel_startup_controller(struct sdw_intel_ctx *ctx) | |
286 | { | |
8733729e | 287 | struct acpi_device *adev = acpi_fetch_acpi_dev(ctx->handle); |
29a269c6 | 288 | struct sdw_intel_link_dev *ldev; |
6d2c6669 PLB |
289 | u32 link_mask; |
290 | int i; | |
291 | ||
8733729e | 292 | if (!adev) |
6d2c6669 PLB |
293 | return -EINVAL; |
294 | ||
29a269c6 | 295 | if (!ctx->ldev) |
6d2c6669 PLB |
296 | return -EINVAL; |
297 | ||
6d2c6669 PLB |
298 | link_mask = ctx->link_mask; |
299 | ||
300 | /* Startup SDW Master devices */ | |
29a269c6 | 301 | for (i = 0; i < ctx->count; i++) { |
6d2c6669 PLB |
302 | if (!(link_mask & BIT(i))) |
303 | continue; | |
304 | ||
29a269c6 PLB |
305 | ldev = ctx->ldev[i]; |
306 | ||
307 | intel_link_startup(&ldev->auxdev); | |
ab996b29 | 308 | |
29a269c6 | 309 | if (!ldev->link_res.clock_stop_quirks) { |
ab996b29 PLB |
310 | /* |
311 | * we need to prevent the parent PCI device | |
312 | * from entering pm_runtime suspend, so that | |
313 | * power rails to the SoundWire IP are not | |
314 | * turned off. | |
315 | */ | |
29a269c6 | 316 | pm_runtime_get_noresume(ldev->link_res.dev); |
ab996b29 | 317 | } |
6d2c6669 PLB |
318 | } |
319 | ||
320 | return 0; | |
321 | } | |
322 | ||
6d2c6669 PLB |
323 | /** |
324 | * sdw_intel_probe() - SoundWire Intel probe routine | |
325 | * @res: resource data | |
326 | * | |
29a269c6 PLB |
327 | * This registers an auxiliary device for each Master handled by the controller, |
328 | * and SoundWire Master and Slave devices will be created by the auxiliary | |
6d2c6669 PLB |
329 | * device probe. All the information necessary is stored in the context, and |
330 | * the res argument pointer can be freed after this step. | |
331 | * This function will be called after sdw_intel_acpi_scan() by SOF probe. | |
332 | */ | |
333 | struct sdw_intel_ctx | |
334 | *sdw_intel_probe(struct sdw_intel_res *res) | |
335 | { | |
336 | return sdw_intel_probe_controller(res); | |
337 | } | |
8459cea7 | 338 | EXPORT_SYMBOL_NS(sdw_intel_probe, SOUNDWIRE_INTEL_INIT); |
6d2c6669 PLB |
339 | |
340 | /** | |
341 | * sdw_intel_startup() - SoundWire Intel startup | |
342 | * @ctx: SoundWire context allocated in the probe | |
343 | * | |
344 | * Startup Intel SoundWire controller. This function will be called after | |
345 | * Intel Audio DSP is powered up. | |
346 | */ | |
347 | int sdw_intel_startup(struct sdw_intel_ctx *ctx) | |
348 | { | |
349 | return sdw_intel_startup_controller(ctx); | |
350 | } | |
8459cea7 | 351 | EXPORT_SYMBOL_NS(sdw_intel_startup, SOUNDWIRE_INTEL_INIT); |
d62a7d41 VK |
352 | /** |
353 | * sdw_intel_exit() - SoundWire Intel exit | |
6d2c6669 | 354 | * @ctx: SoundWire context allocated in the probe |
d62a7d41 VK |
355 | * |
356 | * Delete the controller instances created and cleanup | |
357 | */ | |
f98f690f | 358 | void sdw_intel_exit(struct sdw_intel_ctx *ctx) |
d62a7d41 | 359 | { |
4cd5ea6d BL |
360 | struct sdw_intel_link_res *link; |
361 | ||
362 | /* we first resume links and devices and wait synchronously before the cleanup */ | |
363 | list_for_each_entry(link, &ctx->link_list, list) { | |
364 | struct sdw_bus *bus = &link->cdns->bus; | |
365 | int ret; | |
366 | ||
367 | ret = device_for_each_child(bus->dev, NULL, intel_resume_child_device); | |
368 | if (ret < 0) | |
369 | dev_err(bus->dev, "%s: intel_resume_child_device failed: %d\n", | |
370 | __func__, ret); | |
371 | } | |
372 | ||
6d2c6669 | 373 | sdw_intel_cleanup(ctx); |
29a269c6 PLB |
374 | kfree(ctx->ids); |
375 | kfree(ctx->ldev); | |
376 | kfree(ctx); | |
d62a7d41 | 377 | } |
8459cea7 | 378 | EXPORT_SYMBOL_NS(sdw_intel_exit, SOUNDWIRE_INTEL_INIT); |
d62a7d41 | 379 | |
ab2c9132 RW |
380 | void sdw_intel_process_wakeen_event(struct sdw_intel_ctx *ctx) |
381 | { | |
29a269c6 | 382 | struct sdw_intel_link_dev *ldev; |
ab2c9132 RW |
383 | u32 link_mask; |
384 | int i; | |
385 | ||
29a269c6 | 386 | if (!ctx->ldev) |
ab2c9132 RW |
387 | return; |
388 | ||
ab2c9132 RW |
389 | link_mask = ctx->link_mask; |
390 | ||
391 | /* Startup SDW Master devices */ | |
29a269c6 | 392 | for (i = 0; i < ctx->count; i++) { |
ab2c9132 RW |
393 | if (!(link_mask & BIT(i))) |
394 | continue; | |
395 | ||
29a269c6 PLB |
396 | ldev = ctx->ldev[i]; |
397 | ||
398 | intel_link_process_wakeen_event(&ldev->auxdev); | |
ab2c9132 RW |
399 | } |
400 | } | |
401 | EXPORT_SYMBOL_NS(sdw_intel_process_wakeen_event, SOUNDWIRE_INTEL_INIT); | |
402 | ||
d62a7d41 VK |
403 | MODULE_LICENSE("Dual BSD/GPL"); |
404 | MODULE_DESCRIPTION("Intel Soundwire Init Library"); |