1 | // SPDX-License-Identifier: GPL-2.0-only |
2 | /* |
3 | * OMAP Remote Processor driver |
4 | * |
5 | * Copyright (C) 2011-2020 Texas Instruments Incorporated - http://www.ti.com/ |
6 | * Copyright (C) 2011 Google, Inc. |
7 | * |
8 | * Ohad Ben-Cohen <ohad@wizery.com> |
9 | * Brian Swetland <swetland@google.com> |
10 | * Fernando Guzman Lugo <fernando.lugo@ti.com> |
11 | * Mark Grosen <mgrosen@ti.com> |
12 | * Suman Anna <s-anna@ti.com> |
13 | * Hari Kanigeri <h-kanigeri2@ti.com> |
14 | */ |
15 | |
16 | #include <linux/kernel.h> |
17 | #include <linux/module.h> |
18 | #include <linux/clk.h> |
19 | #include <linux/clk/ti.h> |
20 | #include <linux/err.h> |
21 | #include <linux/io.h> |
22 | #include <linux/of.h> |
23 | #include <linux/of_platform.h> |
24 | #include <linux/of_reserved_mem.h> |
25 | #include <linux/platform_device.h> |
26 | #include <linux/pm_runtime.h> |
27 | #include <linux/dma-mapping.h> |
28 | #include <linux/interrupt.h> |
29 | #include <linux/remoteproc.h> |
30 | #include <linux/mailbox_client.h> |
31 | #include <linux/omap-iommu.h> |
32 | #include <linux/omap-mailbox.h> |
33 | #include <linux/regmap.h> |
34 | #include <linux/mfd/syscon.h> |
35 | #include <linux/reset.h> |
36 | #include <clocksource/timer-ti-dm.h> |
37 | |
38 | #include <linux/platform_data/dmtimer-omap.h> |
39 | |
40 | #include "omap_remoteproc.h" |
41 | #include "remoteproc_internal.h" |
42 | |
43 | /* default auto-suspend delay (ms) */ |
44 | #define DEFAULT_AUTOSUSPEND_DELAY 10000 |
45 | |
46 | /** |
47 | * struct omap_rproc_boot_data - boot data structure for the DSP omap rprocs |
48 | * @syscon: regmap handle for the system control configuration module |
49 | * @boot_reg: boot register offset within the @syscon regmap |
50 | * @boot_reg_shift: bit-field shift required for the boot address value in |
51 | * @boot_reg |
52 | */ |
53 | struct omap_rproc_boot_data { |
54 | struct regmap *syscon; |
55 | unsigned int boot_reg; |
56 | unsigned int boot_reg_shift; |
57 | }; |
58 | |
59 | /** |
60 | * struct omap_rproc_mem - internal memory structure |
61 | * @cpu_addr: MPU virtual address of the memory region |
62 | * @bus_addr: bus address used to access the memory region |
63 | * @dev_addr: device address of the memory region from DSP view |
64 | * @size: size of the memory region |
65 | */ |
66 | struct omap_rproc_mem { |
67 | void __iomem *cpu_addr; |
68 | phys_addr_t bus_addr; |
69 | u32 dev_addr; |
70 | size_t size; |
71 | }; |
72 | |
73 | /** |
74 | * struct omap_rproc_timer - data structure for a timer used by a omap rproc |
75 | * @odt: timer pointer |
76 | * @timer_ops: OMAP dmtimer ops for @odt timer |
77 | * @irq: timer irq |
78 | */ |
79 | struct omap_rproc_timer { |
80 | struct omap_dm_timer *odt; |
81 | const struct omap_dm_timer_ops *timer_ops; |
82 | int irq; |
83 | }; |
84 | |
85 | /** |
86 | * struct omap_rproc - omap remote processor state |
87 | * @mbox: mailbox channel handle |
88 | * @client: mailbox client to request the mailbox channel |
89 | * @boot_data: boot data structure for setting processor boot address |
90 | * @mem: internal memory regions data |
91 | * @num_mems: number of internal memory regions |
92 | * @num_timers: number of rproc timer(s) |
93 | * @num_wd_timers: number of rproc watchdog timers |
94 | * @timers: timer(s) info used by rproc |
95 | * @autosuspend_delay: auto-suspend delay value to be used for runtime pm |
96 | * @need_resume: if true a resume is needed in the system resume callback |
97 | * @rproc: rproc handle |
98 | * @reset: reset handle |
99 | * @pm_comp: completion primitive to sync for suspend response |
100 | * @fck: functional clock for the remoteproc |
101 | * @suspend_acked: state machine flag to store the suspend request ack |
102 | */ |
103 | struct omap_rproc { |
104 | struct mbox_chan *mbox; |
105 | struct mbox_client client; |
106 | struct omap_rproc_boot_data *boot_data; |
107 | struct omap_rproc_mem *mem; |
108 | int num_mems; |
109 | int num_timers; |
110 | int num_wd_timers; |
111 | struct omap_rproc_timer *timers; |
112 | int autosuspend_delay; |
113 | bool need_resume; |
114 | struct rproc *rproc; |
115 | struct reset_control *reset; |
116 | struct completion pm_comp; |
117 | struct clk *fck; |
118 | bool suspend_acked; |
119 | }; |
120 | |
121 | /** |
122 | * struct omap_rproc_mem_data - memory definitions for an omap remote processor |
123 | * @name: name for this memory entry |
124 | * @dev_addr: device address for the memory entry |
125 | */ |
126 | struct omap_rproc_mem_data { |
127 | const char *name; |
128 | const u32 dev_addr; |
129 | }; |
130 | |
131 | /** |
132 | * struct omap_rproc_dev_data - device data for the omap remote processor |
133 | * @device_name: device name of the remote processor |
134 | * @mems: memory definitions for this remote processor |
135 | */ |
136 | struct omap_rproc_dev_data { |
137 | const char *device_name; |
138 | const struct omap_rproc_mem_data *mems; |
139 | }; |
140 | |
141 | /** |
142 | * omap_rproc_request_timer() - request a timer for a remoteproc |
143 | * @dev: device requesting the timer |
144 | * @np: device node pointer to the desired timer |
145 | * @timer: handle to a struct omap_rproc_timer to return the timer handle |
146 | * |
147 | * This helper function is used primarily to request a timer associated with |
148 | * a remoteproc. The returned handle is stored in the .odt field of the |
149 | * @timer structure passed in, and is used to invoke other timer specific |
150 | * ops (like starting a timer either during device initialization or during |
151 | * a resume operation, or for stopping/freeing a timer). |
152 | * |
153 | * Return: 0 on success, otherwise an appropriate failure |
154 | */ |
155 | static int omap_rproc_request_timer(struct device *dev, struct device_node *np, |
156 | struct omap_rproc_timer *timer) |
157 | { |
158 | int ret; |
159 | |
160 | timer->odt = timer->timer_ops->request_by_node(np); |
161 | if (!timer->odt) { |
162 | dev_err(dev, "request for timer node %p failed\n" , np); |
163 | return -EBUSY; |
164 | } |
165 | |
166 | ret = timer->timer_ops->set_source(timer->odt, OMAP_TIMER_SRC_SYS_CLK); |
167 | if (ret) { |
168 | dev_err(dev, "error setting OMAP_TIMER_SRC_SYS_CLK as source for timer node %p\n" , |
169 | np); |
170 | timer->timer_ops->free(timer->odt); |
171 | return ret; |
172 | } |
173 | |
174 | /* clean counter, remoteproc code will set the value */ |
175 | timer->timer_ops->set_load(timer->odt, 0); |
176 | |
177 | return 0; |
178 | } |
179 | |
180 | /** |
181 | * omap_rproc_start_timer() - start a timer for a remoteproc |
182 | * @timer: handle to a OMAP rproc timer |
183 | * |
184 | * This helper function is used to start a timer associated with a remoteproc, |
185 | * obtained using the request_timer ops. The helper function needs to be |
186 | * invoked by the driver to start the timer (during device initialization) |
187 | * or to just resume the timer. |
188 | * |
189 | * Return: 0 on success, otherwise a failure as returned by DMTimer ops |
190 | */ |
191 | static inline int omap_rproc_start_timer(struct omap_rproc_timer *timer) |
192 | { |
193 | return timer->timer_ops->start(timer->odt); |
194 | } |
195 | |
196 | /** |
197 | * omap_rproc_stop_timer() - stop a timer for a remoteproc |
198 | * @timer: handle to a OMAP rproc timer |
199 | * |
200 | * This helper function is used to disable a timer associated with a |
201 | * remoteproc, and needs to be called either during a device shutdown |
202 | * or suspend operation. The separate helper function allows the driver |
203 | * to just stop a timer without having to release the timer during a |
204 | * suspend operation. |
205 | * |
206 | * Return: 0 on success, otherwise a failure as returned by DMTimer ops |
207 | */ |
208 | static inline int omap_rproc_stop_timer(struct omap_rproc_timer *timer) |
209 | { |
210 | return timer->timer_ops->stop(timer->odt); |
211 | } |
212 | |
213 | /** |
214 | * omap_rproc_release_timer() - release a timer for a remoteproc |
215 | * @timer: handle to a OMAP rproc timer |
216 | * |
217 | * This helper function is used primarily to release a timer associated |
218 | * with a remoteproc. The dmtimer will be available for other clients to |
219 | * use once released. |
220 | * |
221 | * Return: 0 on success, otherwise a failure as returned by DMTimer ops |
222 | */ |
223 | static inline int omap_rproc_release_timer(struct omap_rproc_timer *timer) |
224 | { |
225 | return timer->timer_ops->free(timer->odt); |
226 | } |
227 | |
228 | /** |
229 | * omap_rproc_get_timer_irq() - get the irq for a timer |
230 | * @timer: handle to a OMAP rproc timer |
231 | * |
232 | * This function is used to get the irq associated with a watchdog timer. The |
233 | * function is called by the OMAP remoteproc driver to register a interrupt |
234 | * handler to handle watchdog events on the remote processor. |
235 | * |
236 | * Return: irq id on success, otherwise a failure as returned by DMTimer ops |
237 | */ |
238 | static inline int omap_rproc_get_timer_irq(struct omap_rproc_timer *timer) |
239 | { |
240 | return timer->timer_ops->get_irq(timer->odt); |
241 | } |
242 | |
243 | /** |
244 | * omap_rproc_ack_timer_irq() - acknowledge a timer irq |
245 | * @timer: handle to a OMAP rproc timer |
246 | * |
247 | * This function is used to clear the irq associated with a watchdog timer. |
248 | * The function is called by the OMAP remoteproc upon a watchdog event on the |
249 | * remote processor to clear the interrupt status of the watchdog timer. |
250 | */ |
251 | static inline void omap_rproc_ack_timer_irq(struct omap_rproc_timer *timer) |
252 | { |
253 | timer->timer_ops->write_status(timer->odt, OMAP_TIMER_INT_OVERFLOW); |
254 | } |
255 | |
256 | /** |
257 | * omap_rproc_watchdog_isr() - Watchdog ISR handler for remoteproc device |
258 | * @irq: IRQ number associated with a watchdog timer |
259 | * @data: IRQ handler data |
260 | * |
261 | * This ISR routine executes the required necessary low-level code to |
262 | * acknowledge a watchdog timer interrupt. There can be multiple watchdog |
263 | * timers associated with a rproc (like IPUs which have 2 watchdog timers, |
264 | * one per Cortex M3/M4 core), so a lookup has to be performed to identify |
265 | * the timer to acknowledge its interrupt. |
266 | * |
267 | * The function also invokes rproc_report_crash to report the watchdog event |
268 | * to the remoteproc driver core, to trigger a recovery. |
269 | * |
270 | * Return: IRQ_HANDLED on success, otherwise IRQ_NONE |
271 | */ |
272 | static irqreturn_t omap_rproc_watchdog_isr(int irq, void *data) |
273 | { |
274 | struct rproc *rproc = data; |
275 | struct omap_rproc *oproc = rproc->priv; |
276 | struct device *dev = rproc->dev.parent; |
277 | struct omap_rproc_timer *timers = oproc->timers; |
278 | struct omap_rproc_timer *wd_timer = NULL; |
279 | int num_timers = oproc->num_timers + oproc->num_wd_timers; |
280 | int i; |
281 | |
282 | for (i = oproc->num_timers; i < num_timers; i++) { |
283 | if (timers[i].irq > 0 && irq == timers[i].irq) { |
284 | wd_timer = &timers[i]; |
285 | break; |
286 | } |
287 | } |
288 | |
289 | if (!wd_timer) { |
290 | dev_err(dev, "invalid timer\n" ); |
291 | return IRQ_NONE; |
292 | } |
293 | |
294 | omap_rproc_ack_timer_irq(timer: wd_timer); |
295 | |
296 | rproc_report_crash(rproc, type: RPROC_WATCHDOG); |
297 | |
298 | return IRQ_HANDLED; |
299 | } |
300 | |
301 | /** |
302 | * omap_rproc_enable_timers() - enable the timers for a remoteproc |
303 | * @rproc: handle of a remote processor |
304 | * @configure: boolean flag used to acquire and configure the timer handle |
305 | * |
306 | * This function is used primarily to enable the timers associated with |
307 | * a remoteproc. The configure flag is provided to allow the driver |
308 | * to either acquire and start a timer (during device initialization) or |
309 | * to just start a timer (during a resume operation). |
310 | * |
311 | * Return: 0 on success, otherwise an appropriate failure |
312 | */ |
313 | static int omap_rproc_enable_timers(struct rproc *rproc, bool configure) |
314 | { |
315 | int i; |
316 | int ret = 0; |
317 | struct platform_device *tpdev; |
318 | struct dmtimer_platform_data *tpdata; |
319 | const struct omap_dm_timer_ops *timer_ops; |
320 | struct omap_rproc *oproc = rproc->priv; |
321 | struct omap_rproc_timer *timers = oproc->timers; |
322 | struct device *dev = rproc->dev.parent; |
323 | struct device_node *np = NULL; |
324 | int num_timers = oproc->num_timers + oproc->num_wd_timers; |
325 | |
326 | if (!num_timers) |
327 | return 0; |
328 | |
329 | if (!configure) |
330 | goto start_timers; |
331 | |
332 | for (i = 0; i < num_timers; i++) { |
333 | if (i < oproc->num_timers) |
334 | np = of_parse_phandle(np: dev->of_node, phandle_name: "ti,timers" , index: i); |
335 | else |
336 | np = of_parse_phandle(np: dev->of_node, |
337 | phandle_name: "ti,watchdog-timers" , |
338 | index: (i - oproc->num_timers)); |
339 | if (!np) { |
340 | ret = -ENXIO; |
341 | dev_err(dev, "device node lookup for timer at index %d failed: %d\n" , |
342 | i < oproc->num_timers ? i : |
343 | i - oproc->num_timers, ret); |
344 | goto free_timers; |
345 | } |
346 | |
347 | tpdev = of_find_device_by_node(np); |
348 | if (!tpdev) { |
349 | ret = -ENODEV; |
350 | dev_err(dev, "could not get timer platform device\n" ); |
351 | goto put_node; |
352 | } |
353 | |
354 | tpdata = dev_get_platdata(dev: &tpdev->dev); |
355 | put_device(dev: &tpdev->dev); |
356 | if (!tpdata) { |
357 | ret = -EINVAL; |
358 | dev_err(dev, "dmtimer pdata structure NULL\n" ); |
359 | goto put_node; |
360 | } |
361 | |
362 | timer_ops = tpdata->timer_ops; |
363 | if (!timer_ops || !timer_ops->request_by_node || |
364 | !timer_ops->set_source || !timer_ops->set_load || |
365 | !timer_ops->free || !timer_ops->start || |
366 | !timer_ops->stop || !timer_ops->get_irq || |
367 | !timer_ops->write_status) { |
368 | ret = -EINVAL; |
369 | dev_err(dev, "device does not have required timer ops\n" ); |
370 | goto put_node; |
371 | } |
372 | |
373 | timers[i].irq = -1; |
374 | timers[i].timer_ops = timer_ops; |
375 | ret = omap_rproc_request_timer(dev, np, timer: &timers[i]); |
376 | if (ret) { |
377 | dev_err(dev, "request for timer %p failed: %d\n" , np, |
378 | ret); |
379 | goto put_node; |
380 | } |
381 | of_node_put(node: np); |
382 | |
383 | if (i >= oproc->num_timers) { |
384 | timers[i].irq = omap_rproc_get_timer_irq(timer: &timers[i]); |
385 | if (timers[i].irq < 0) { |
386 | dev_err(dev, "get_irq for timer %p failed: %d\n" , |
387 | np, timers[i].irq); |
388 | ret = -EBUSY; |
389 | goto free_timers; |
390 | } |
391 | |
392 | ret = request_irq(irq: timers[i].irq, |
393 | handler: omap_rproc_watchdog_isr, IRQF_SHARED, |
394 | name: "rproc-wdt" , dev: rproc); |
395 | if (ret) { |
396 | dev_err(dev, "error requesting irq for timer %p\n" , |
397 | np); |
398 | omap_rproc_release_timer(timer: &timers[i]); |
399 | timers[i].odt = NULL; |
400 | timers[i].timer_ops = NULL; |
401 | timers[i].irq = -1; |
402 | goto free_timers; |
403 | } |
404 | } |
405 | } |
406 | |
407 | start_timers: |
408 | for (i = 0; i < num_timers; i++) { |
409 | ret = omap_rproc_start_timer(timer: &timers[i]); |
410 | if (ret) { |
411 | dev_err(dev, "start timer %p failed failed: %d\n" , np, |
412 | ret); |
413 | break; |
414 | } |
415 | } |
416 | if (ret) { |
417 | while (i >= 0) { |
418 | omap_rproc_stop_timer(timer: &timers[i]); |
419 | i--; |
420 | } |
421 | goto put_node; |
422 | } |
423 | return 0; |
424 | |
425 | put_node: |
426 | if (configure) |
427 | of_node_put(node: np); |
428 | free_timers: |
429 | while (i--) { |
430 | if (i >= oproc->num_timers) |
431 | free_irq(timers[i].irq, rproc); |
432 | omap_rproc_release_timer(timer: &timers[i]); |
433 | timers[i].odt = NULL; |
434 | timers[i].timer_ops = NULL; |
435 | timers[i].irq = -1; |
436 | } |
437 | |
438 | return ret; |
439 | } |
440 | |
441 | /** |
442 | * omap_rproc_disable_timers() - disable the timers for a remoteproc |
443 | * @rproc: handle of a remote processor |
444 | * @configure: boolean flag used to release the timer handle |
445 | * |
446 | * This function is used primarily to disable the timers associated with |
447 | * a remoteproc. The configure flag is provided to allow the driver |
448 | * to either stop and release a timer (during device shutdown) or to just |
449 | * stop a timer (during a suspend operation). |
450 | * |
451 | * Return: 0 on success or no timers |
452 | */ |
453 | static int omap_rproc_disable_timers(struct rproc *rproc, bool configure) |
454 | { |
455 | int i; |
456 | struct omap_rproc *oproc = rproc->priv; |
457 | struct omap_rproc_timer *timers = oproc->timers; |
458 | int num_timers = oproc->num_timers + oproc->num_wd_timers; |
459 | |
460 | if (!num_timers) |
461 | return 0; |
462 | |
463 | for (i = 0; i < num_timers; i++) { |
464 | omap_rproc_stop_timer(timer: &timers[i]); |
465 | if (configure) { |
466 | if (i >= oproc->num_timers) |
467 | free_irq(timers[i].irq, rproc); |
468 | omap_rproc_release_timer(timer: &timers[i]); |
469 | timers[i].odt = NULL; |
470 | timers[i].timer_ops = NULL; |
471 | timers[i].irq = -1; |
472 | } |
473 | } |
474 | |
475 | return 0; |
476 | } |
477 | |
478 | /** |
479 | * omap_rproc_mbox_callback() - inbound mailbox message handler |
480 | * @client: mailbox client pointer used for requesting the mailbox channel |
481 | * @data: mailbox payload |
482 | * |
483 | * This handler is invoked by omap's mailbox driver whenever a mailbox |
484 | * message is received. Usually, the mailbox payload simply contains |
485 | * the index of the virtqueue that is kicked by the remote processor, |
486 | * and we let remoteproc core handle it. |
487 | * |
488 | * In addition to virtqueue indices, we also have some out-of-band values |
489 | * that indicates different events. Those values are deliberately very |
490 | * big so they don't coincide with virtqueue indices. |
491 | */ |
492 | static void omap_rproc_mbox_callback(struct mbox_client *client, void *data) |
493 | { |
494 | struct omap_rproc *oproc = container_of(client, struct omap_rproc, |
495 | client); |
496 | struct device *dev = oproc->rproc->dev.parent; |
497 | const char *name = oproc->rproc->name; |
498 | u32 msg = (u32)data; |
499 | |
500 | dev_dbg(dev, "mbox msg: 0x%x\n" , msg); |
501 | |
502 | switch (msg) { |
503 | case RP_MBOX_CRASH: |
504 | /* |
505 | * remoteproc detected an exception, notify the rproc core. |
506 | * The remoteproc core will handle the recovery. |
507 | */ |
508 | dev_err(dev, "omap rproc %s crashed\n" , name); |
509 | rproc_report_crash(rproc: oproc->rproc, type: RPROC_FATAL_ERROR); |
510 | break; |
511 | case RP_MBOX_ECHO_REPLY: |
512 | dev_info(dev, "received echo reply from %s\n" , name); |
513 | break; |
514 | case RP_MBOX_SUSPEND_ACK: |
515 | case RP_MBOX_SUSPEND_CANCEL: |
516 | oproc->suspend_acked = msg == RP_MBOX_SUSPEND_ACK; |
517 | complete(&oproc->pm_comp); |
518 | break; |
519 | default: |
520 | if (msg >= RP_MBOX_READY && msg < RP_MBOX_END_MSG) |
521 | return; |
522 | if (msg > oproc->rproc->max_notifyid) { |
523 | dev_dbg(dev, "dropping unknown message 0x%x" , msg); |
524 | return; |
525 | } |
526 | /* msg contains the index of the triggered vring */ |
527 | if (rproc_vq_interrupt(rproc: oproc->rproc, vq_id: msg) == IRQ_NONE) |
528 | dev_dbg(dev, "no message was found in vqid %d\n" , msg); |
529 | } |
530 | } |
531 | |
532 | /* kick a virtqueue */ |
533 | static void omap_rproc_kick(struct rproc *rproc, int vqid) |
534 | { |
535 | struct omap_rproc *oproc = rproc->priv; |
536 | struct device *dev = rproc->dev.parent; |
537 | int ret; |
538 | |
539 | /* wake up the rproc before kicking it */ |
540 | ret = pm_runtime_get_sync(dev); |
541 | if (WARN_ON(ret < 0)) { |
542 | dev_err(dev, "pm_runtime_get_sync() failed during kick, ret = %d\n" , |
543 | ret); |
544 | pm_runtime_put_noidle(dev); |
545 | return; |
546 | } |
547 | |
548 | /* send the index of the triggered virtqueue in the mailbox payload */ |
549 | ret = mbox_send_message(chan: oproc->mbox, mssg: (void *)vqid); |
550 | if (ret < 0) |
551 | dev_err(dev, "failed to send mailbox message, status = %d\n" , |
552 | ret); |
553 | |
554 | pm_runtime_mark_last_busy(dev); |
555 | pm_runtime_put_autosuspend(dev); |
556 | } |
557 | |
558 | /** |
559 | * omap_rproc_write_dsp_boot_addr() - set boot address for DSP remote processor |
560 | * @rproc: handle of a remote processor |
561 | * |
562 | * Set boot address for a supported DSP remote processor. |
563 | * |
564 | * Return: 0 on success, or -EINVAL if boot address is not aligned properly |
565 | */ |
566 | static int omap_rproc_write_dsp_boot_addr(struct rproc *rproc) |
567 | { |
568 | struct device *dev = rproc->dev.parent; |
569 | struct omap_rproc *oproc = rproc->priv; |
570 | struct omap_rproc_boot_data *bdata = oproc->boot_data; |
571 | u32 offset = bdata->boot_reg; |
572 | u32 value; |
573 | u32 mask; |
574 | |
575 | if (rproc->bootaddr & (SZ_1K - 1)) { |
576 | dev_err(dev, "invalid boot address 0x%llx, must be aligned on a 1KB boundary\n" , |
577 | rproc->bootaddr); |
578 | return -EINVAL; |
579 | } |
580 | |
581 | value = rproc->bootaddr >> bdata->boot_reg_shift; |
582 | mask = ~(SZ_1K - 1) >> bdata->boot_reg_shift; |
583 | |
584 | return regmap_update_bits(map: bdata->syscon, reg: offset, mask, val: value); |
585 | } |
586 | |
587 | /* |
588 | * Power up the remote processor. |
589 | * |
590 | * This function will be invoked only after the firmware for this rproc |
591 | * was loaded, parsed successfully, and all of its resource requirements |
592 | * were met. |
593 | */ |
594 | static int omap_rproc_start(struct rproc *rproc) |
595 | { |
596 | struct omap_rproc *oproc = rproc->priv; |
597 | struct device *dev = rproc->dev.parent; |
598 | int ret; |
599 | struct mbox_client *client = &oproc->client; |
600 | |
601 | if (oproc->boot_data) { |
602 | ret = omap_rproc_write_dsp_boot_addr(rproc); |
603 | if (ret) |
604 | return ret; |
605 | } |
606 | |
607 | client->dev = dev; |
608 | client->tx_done = NULL; |
609 | client->rx_callback = omap_rproc_mbox_callback; |
610 | client->tx_block = false; |
611 | client->knows_txdone = false; |
612 | |
613 | oproc->mbox = mbox_request_channel(cl: client, index: 0); |
614 | if (IS_ERR(ptr: oproc->mbox)) { |
615 | ret = -EBUSY; |
616 | dev_err(dev, "mbox_request_channel failed: %ld\n" , |
617 | PTR_ERR(oproc->mbox)); |
618 | return ret; |
619 | } |
620 | |
621 | /* |
622 | * Ping the remote processor. this is only for sanity-sake; |
623 | * there is no functional effect whatsoever. |
624 | * |
625 | * Note that the reply will _not_ arrive immediately: this message |
626 | * will wait in the mailbox fifo until the remote processor is booted. |
627 | */ |
628 | ret = mbox_send_message(chan: oproc->mbox, mssg: (void *)RP_MBOX_ECHO_REQUEST); |
629 | if (ret < 0) { |
630 | dev_err(dev, "mbox_send_message failed: %d\n" , ret); |
631 | goto put_mbox; |
632 | } |
633 | |
634 | ret = omap_rproc_enable_timers(rproc, configure: true); |
635 | if (ret) { |
636 | dev_err(dev, "omap_rproc_enable_timers failed: %d\n" , ret); |
637 | goto put_mbox; |
638 | } |
639 | |
640 | ret = reset_control_deassert(rstc: oproc->reset); |
641 | if (ret) { |
642 | dev_err(dev, "reset control deassert failed: %d\n" , ret); |
643 | goto disable_timers; |
644 | } |
645 | |
646 | /* |
647 | * remote processor is up, so update the runtime pm status and |
648 | * enable the auto-suspend. The device usage count is incremented |
649 | * manually for balancing it for auto-suspend |
650 | */ |
651 | pm_runtime_set_active(dev); |
652 | pm_runtime_use_autosuspend(dev); |
653 | pm_runtime_get_noresume(dev); |
654 | pm_runtime_enable(dev); |
655 | pm_runtime_mark_last_busy(dev); |
656 | pm_runtime_put_autosuspend(dev); |
657 | |
658 | return 0; |
659 | |
660 | disable_timers: |
661 | omap_rproc_disable_timers(rproc, configure: true); |
662 | put_mbox: |
663 | mbox_free_channel(chan: oproc->mbox); |
664 | return ret; |
665 | } |
666 | |
667 | /* power off the remote processor */ |
668 | static int omap_rproc_stop(struct rproc *rproc) |
669 | { |
670 | struct device *dev = rproc->dev.parent; |
671 | struct omap_rproc *oproc = rproc->priv; |
672 | int ret; |
673 | |
674 | /* |
675 | * cancel any possible scheduled runtime suspend by incrementing |
676 | * the device usage count, and resuming the device. The remoteproc |
677 | * also needs to be woken up if suspended, to avoid the remoteproc |
678 | * OS to continue to remember any context that it has saved, and |
679 | * avoid potential issues in misindentifying a subsequent device |
680 | * reboot as a power restore boot |
681 | */ |
682 | ret = pm_runtime_get_sync(dev); |
683 | if (ret < 0) { |
684 | pm_runtime_put_noidle(dev); |
685 | return ret; |
686 | } |
687 | |
688 | ret = reset_control_assert(rstc: oproc->reset); |
689 | if (ret) |
690 | goto out; |
691 | |
692 | ret = omap_rproc_disable_timers(rproc, configure: true); |
693 | if (ret) |
694 | goto enable_device; |
695 | |
696 | mbox_free_channel(chan: oproc->mbox); |
697 | |
698 | /* |
699 | * update the runtime pm states and status now that the remoteproc |
700 | * has stopped |
701 | */ |
702 | pm_runtime_disable(dev); |
703 | pm_runtime_dont_use_autosuspend(dev); |
704 | pm_runtime_put_noidle(dev); |
705 | pm_runtime_set_suspended(dev); |
706 | |
707 | return 0; |
708 | |
709 | enable_device: |
710 | reset_control_deassert(rstc: oproc->reset); |
711 | out: |
712 | /* schedule the next auto-suspend */ |
713 | pm_runtime_mark_last_busy(dev); |
714 | pm_runtime_put_autosuspend(dev); |
715 | return ret; |
716 | } |
717 | |
718 | /** |
719 | * omap_rproc_da_to_va() - internal memory translation helper |
720 | * @rproc: remote processor to apply the address translation for |
721 | * @da: device address to translate |
722 | * @len: length of the memory buffer |
723 | * |
724 | * Custom function implementing the rproc .da_to_va ops to provide address |
725 | * translation (device address to kernel virtual address) for internal RAMs |
726 | * present in a DSP or IPU device). The translated addresses can be used |
727 | * either by the remoteproc core for loading, or by any rpmsg bus drivers. |
728 | * |
729 | * Return: translated virtual address in kernel memory space on success, |
730 | * or NULL on failure. |
731 | */ |
732 | static void *omap_rproc_da_to_va(struct rproc *rproc, u64 da, size_t len, bool *is_iomem) |
733 | { |
734 | struct omap_rproc *oproc = rproc->priv; |
735 | int i; |
736 | u32 offset; |
737 | |
738 | if (len <= 0) |
739 | return NULL; |
740 | |
741 | if (!oproc->num_mems) |
742 | return NULL; |
743 | |
744 | for (i = 0; i < oproc->num_mems; i++) { |
745 | if (da >= oproc->mem[i].dev_addr && da + len <= |
746 | oproc->mem[i].dev_addr + oproc->mem[i].size) { |
747 | offset = da - oproc->mem[i].dev_addr; |
748 | /* __force to make sparse happy with type conversion */ |
749 | return (__force void *)(oproc->mem[i].cpu_addr + |
750 | offset); |
751 | } |
752 | } |
753 | |
754 | return NULL; |
755 | } |
756 | |
757 | static const struct rproc_ops omap_rproc_ops = { |
758 | .start = omap_rproc_start, |
759 | .stop = omap_rproc_stop, |
760 | .kick = omap_rproc_kick, |
761 | .da_to_va = omap_rproc_da_to_va, |
762 | }; |
763 | |
764 | #ifdef CONFIG_PM |
765 | static bool _is_rproc_in_standby(struct omap_rproc *oproc) |
766 | { |
767 | return ti_clk_is_in_standby(clk: oproc->fck); |
768 | } |
769 | |
770 | /* 1 sec is long enough time to let the remoteproc side suspend the device */ |
771 | #define DEF_SUSPEND_TIMEOUT 1000 |
772 | static int _omap_rproc_suspend(struct rproc *rproc, bool auto_suspend) |
773 | { |
774 | struct device *dev = rproc->dev.parent; |
775 | struct omap_rproc *oproc = rproc->priv; |
776 | unsigned long to = msecs_to_jiffies(DEF_SUSPEND_TIMEOUT); |
777 | unsigned long ta = jiffies + to; |
778 | u32 suspend_msg = auto_suspend ? |
779 | RP_MBOX_SUSPEND_AUTO : RP_MBOX_SUSPEND_SYSTEM; |
780 | int ret; |
781 | |
782 | reinit_completion(x: &oproc->pm_comp); |
783 | oproc->suspend_acked = false; |
784 | ret = mbox_send_message(chan: oproc->mbox, mssg: (void *)suspend_msg); |
785 | if (ret < 0) { |
786 | dev_err(dev, "PM mbox_send_message failed: %d\n" , ret); |
787 | return ret; |
788 | } |
789 | |
790 | ret = wait_for_completion_timeout(x: &oproc->pm_comp, timeout: to); |
791 | if (!oproc->suspend_acked) |
792 | return -EBUSY; |
793 | |
794 | /* |
795 | * The remoteproc side is returning the ACK message before saving the |
796 | * context, because the context saving is performed within a SYS/BIOS |
797 | * function, and it cannot have any inter-dependencies against the IPC |
798 | * layer. Also, as the SYS/BIOS needs to preserve properly the processor |
799 | * register set, sending this ACK or signalling the completion of the |
800 | * context save through a shared memory variable can never be the |
801 | * absolute last thing to be executed on the remoteproc side, and the |
802 | * MPU cannot use the ACK message as a sync point to put the remoteproc |
803 | * into reset. The only way to ensure that the remote processor has |
804 | * completed saving the context is to check that the module has reached |
805 | * STANDBY state (after saving the context, the SYS/BIOS executes the |
806 | * appropriate target-specific WFI instruction causing the module to |
807 | * enter STANDBY). |
808 | */ |
809 | while (!_is_rproc_in_standby(oproc)) { |
810 | if (time_after(jiffies, ta)) |
811 | return -ETIME; |
812 | schedule(); |
813 | } |
814 | |
815 | ret = reset_control_assert(rstc: oproc->reset); |
816 | if (ret) { |
817 | dev_err(dev, "reset assert during suspend failed %d\n" , ret); |
818 | return ret; |
819 | } |
820 | |
821 | ret = omap_rproc_disable_timers(rproc, configure: false); |
822 | if (ret) { |
823 | dev_err(dev, "disabling timers during suspend failed %d\n" , |
824 | ret); |
825 | goto enable_device; |
826 | } |
827 | |
828 | /* |
829 | * IOMMUs would have to be disabled specifically for runtime suspend. |
830 | * They are handled automatically through System PM callbacks for |
831 | * regular system suspend |
832 | */ |
833 | if (auto_suspend) { |
834 | ret = omap_iommu_domain_deactivate(domain: rproc->domain); |
835 | if (ret) { |
836 | dev_err(dev, "iommu domain deactivate failed %d\n" , |
837 | ret); |
838 | goto enable_timers; |
839 | } |
840 | } |
841 | |
842 | return 0; |
843 | |
844 | enable_timers: |
845 | /* ignore errors on re-enabling code */ |
846 | omap_rproc_enable_timers(rproc, configure: false); |
847 | enable_device: |
848 | reset_control_deassert(rstc: oproc->reset); |
849 | return ret; |
850 | } |
851 | |
852 | static int _omap_rproc_resume(struct rproc *rproc, bool auto_suspend) |
853 | { |
854 | struct device *dev = rproc->dev.parent; |
855 | struct omap_rproc *oproc = rproc->priv; |
856 | int ret; |
857 | |
858 | /* |
859 | * IOMMUs would have to be enabled specifically for runtime resume. |
860 | * They would have been already enabled automatically through System |
861 | * PM callbacks for regular system resume |
862 | */ |
863 | if (auto_suspend) { |
864 | ret = omap_iommu_domain_activate(domain: rproc->domain); |
865 | if (ret) { |
866 | dev_err(dev, "omap_iommu activate failed %d\n" , ret); |
867 | goto out; |
868 | } |
869 | } |
870 | |
871 | /* boot address could be lost after suspend, so restore it */ |
872 | if (oproc->boot_data) { |
873 | ret = omap_rproc_write_dsp_boot_addr(rproc); |
874 | if (ret) { |
875 | dev_err(dev, "boot address restore failed %d\n" , ret); |
876 | goto suspend_iommu; |
877 | } |
878 | } |
879 | |
880 | ret = omap_rproc_enable_timers(rproc, configure: false); |
881 | if (ret) { |
882 | dev_err(dev, "enabling timers during resume failed %d\n" , ret); |
883 | goto suspend_iommu; |
884 | } |
885 | |
886 | ret = reset_control_deassert(rstc: oproc->reset); |
887 | if (ret) { |
888 | dev_err(dev, "reset deassert during resume failed %d\n" , ret); |
889 | goto disable_timers; |
890 | } |
891 | |
892 | return 0; |
893 | |
894 | disable_timers: |
895 | omap_rproc_disable_timers(rproc, configure: false); |
896 | suspend_iommu: |
897 | if (auto_suspend) |
898 | omap_iommu_domain_deactivate(domain: rproc->domain); |
899 | out: |
900 | return ret; |
901 | } |
902 | |
903 | static int __maybe_unused omap_rproc_suspend(struct device *dev) |
904 | { |
905 | struct rproc *rproc = dev_get_drvdata(dev); |
906 | struct omap_rproc *oproc = rproc->priv; |
907 | int ret = 0; |
908 | |
909 | mutex_lock(&rproc->lock); |
910 | if (rproc->state == RPROC_OFFLINE) |
911 | goto out; |
912 | |
913 | if (rproc->state == RPROC_SUSPENDED) |
914 | goto out; |
915 | |
916 | if (rproc->state != RPROC_RUNNING) { |
917 | ret = -EBUSY; |
918 | goto out; |
919 | } |
920 | |
921 | ret = _omap_rproc_suspend(rproc, auto_suspend: false); |
922 | if (ret) { |
923 | dev_err(dev, "suspend failed %d\n" , ret); |
924 | goto out; |
925 | } |
926 | |
927 | /* |
928 | * remoteproc is running at the time of system suspend, so remember |
929 | * it so as to wake it up during system resume |
930 | */ |
931 | oproc->need_resume = true; |
932 | rproc->state = RPROC_SUSPENDED; |
933 | |
934 | out: |
935 | mutex_unlock(lock: &rproc->lock); |
936 | return ret; |
937 | } |
938 | |
939 | static int __maybe_unused omap_rproc_resume(struct device *dev) |
940 | { |
941 | struct rproc *rproc = dev_get_drvdata(dev); |
942 | struct omap_rproc *oproc = rproc->priv; |
943 | int ret = 0; |
944 | |
945 | mutex_lock(&rproc->lock); |
946 | if (rproc->state == RPROC_OFFLINE) |
947 | goto out; |
948 | |
949 | if (rproc->state != RPROC_SUSPENDED) { |
950 | ret = -EBUSY; |
951 | goto out; |
952 | } |
953 | |
954 | /* |
955 | * remoteproc was auto-suspended at the time of system suspend, |
956 | * so no need to wake-up the processor (leave it in suspended |
957 | * state, will be woken up during a subsequent runtime_resume) |
958 | */ |
959 | if (!oproc->need_resume) |
960 | goto out; |
961 | |
962 | ret = _omap_rproc_resume(rproc, auto_suspend: false); |
963 | if (ret) { |
964 | dev_err(dev, "resume failed %d\n" , ret); |
965 | goto out; |
966 | } |
967 | |
968 | oproc->need_resume = false; |
969 | rproc->state = RPROC_RUNNING; |
970 | |
971 | pm_runtime_mark_last_busy(dev); |
972 | out: |
973 | mutex_unlock(lock: &rproc->lock); |
974 | return ret; |
975 | } |
976 | |
977 | static int omap_rproc_runtime_suspend(struct device *dev) |
978 | { |
979 | struct rproc *rproc = dev_get_drvdata(dev); |
980 | struct omap_rproc *oproc = rproc->priv; |
981 | int ret; |
982 | |
983 | mutex_lock(&rproc->lock); |
984 | if (rproc->state == RPROC_CRASHED) { |
985 | dev_dbg(dev, "rproc cannot be runtime suspended when crashed!\n" ); |
986 | ret = -EBUSY; |
987 | goto out; |
988 | } |
989 | |
990 | if (WARN_ON(rproc->state != RPROC_RUNNING)) { |
991 | dev_err(dev, "rproc cannot be runtime suspended when not running!\n" ); |
992 | ret = -EBUSY; |
993 | goto out; |
994 | } |
995 | |
996 | /* |
997 | * do not even attempt suspend if the remote processor is not |
998 | * idled for runtime auto-suspend |
999 | */ |
1000 | if (!_is_rproc_in_standby(oproc)) { |
1001 | ret = -EBUSY; |
1002 | goto abort; |
1003 | } |
1004 | |
1005 | ret = _omap_rproc_suspend(rproc, auto_suspend: true); |
1006 | if (ret) |
1007 | goto abort; |
1008 | |
1009 | rproc->state = RPROC_SUSPENDED; |
1010 | mutex_unlock(lock: &rproc->lock); |
1011 | return 0; |
1012 | |
1013 | abort: |
1014 | pm_runtime_mark_last_busy(dev); |
1015 | out: |
1016 | mutex_unlock(lock: &rproc->lock); |
1017 | return ret; |
1018 | } |
1019 | |
1020 | static int omap_rproc_runtime_resume(struct device *dev) |
1021 | { |
1022 | struct rproc *rproc = dev_get_drvdata(dev); |
1023 | int ret; |
1024 | |
1025 | mutex_lock(&rproc->lock); |
1026 | if (WARN_ON(rproc->state != RPROC_SUSPENDED)) { |
1027 | dev_err(dev, "rproc cannot be runtime resumed if not suspended! state=%d\n" , |
1028 | rproc->state); |
1029 | ret = -EBUSY; |
1030 | goto out; |
1031 | } |
1032 | |
1033 | ret = _omap_rproc_resume(rproc, auto_suspend: true); |
1034 | if (ret) { |
1035 | dev_err(dev, "runtime resume failed %d\n" , ret); |
1036 | goto out; |
1037 | } |
1038 | |
1039 | rproc->state = RPROC_RUNNING; |
1040 | out: |
1041 | mutex_unlock(lock: &rproc->lock); |
1042 | return ret; |
1043 | } |
1044 | #endif /* CONFIG_PM */ |
1045 | |
1046 | static const struct omap_rproc_mem_data ipu_mems[] = { |
1047 | { .name = "l2ram" , .dev_addr = 0x20000000 }, |
1048 | { }, |
1049 | }; |
1050 | |
1051 | static const struct omap_rproc_mem_data dra7_dsp_mems[] = { |
1052 | { .name = "l2ram" , .dev_addr = 0x800000 }, |
1053 | { .name = "l1pram" , .dev_addr = 0xe00000 }, |
1054 | { .name = "l1dram" , .dev_addr = 0xf00000 }, |
1055 | { }, |
1056 | }; |
1057 | |
1058 | static const struct omap_rproc_dev_data omap4_dsp_dev_data = { |
1059 | .device_name = "dsp" , |
1060 | }; |
1061 | |
1062 | static const struct omap_rproc_dev_data omap4_ipu_dev_data = { |
1063 | .device_name = "ipu" , |
1064 | .mems = ipu_mems, |
1065 | }; |
1066 | |
1067 | static const struct omap_rproc_dev_data omap5_dsp_dev_data = { |
1068 | .device_name = "dsp" , |
1069 | }; |
1070 | |
1071 | static const struct omap_rproc_dev_data omap5_ipu_dev_data = { |
1072 | .device_name = "ipu" , |
1073 | .mems = ipu_mems, |
1074 | }; |
1075 | |
1076 | static const struct omap_rproc_dev_data dra7_dsp_dev_data = { |
1077 | .device_name = "dsp" , |
1078 | .mems = dra7_dsp_mems, |
1079 | }; |
1080 | |
1081 | static const struct omap_rproc_dev_data dra7_ipu_dev_data = { |
1082 | .device_name = "ipu" , |
1083 | .mems = ipu_mems, |
1084 | }; |
1085 | |
1086 | static const struct of_device_id omap_rproc_of_match[] = { |
1087 | { |
1088 | .compatible = "ti,omap4-dsp" , |
1089 | .data = &omap4_dsp_dev_data, |
1090 | }, |
1091 | { |
1092 | .compatible = "ti,omap4-ipu" , |
1093 | .data = &omap4_ipu_dev_data, |
1094 | }, |
1095 | { |
1096 | .compatible = "ti,omap5-dsp" , |
1097 | .data = &omap5_dsp_dev_data, |
1098 | }, |
1099 | { |
1100 | .compatible = "ti,omap5-ipu" , |
1101 | .data = &omap5_ipu_dev_data, |
1102 | }, |
1103 | { |
1104 | .compatible = "ti,dra7-dsp" , |
1105 | .data = &dra7_dsp_dev_data, |
1106 | }, |
1107 | { |
1108 | .compatible = "ti,dra7-ipu" , |
1109 | .data = &dra7_ipu_dev_data, |
1110 | }, |
1111 | { |
1112 | /* end */ |
1113 | }, |
1114 | }; |
1115 | MODULE_DEVICE_TABLE(of, omap_rproc_of_match); |
1116 | |
1117 | static const char *omap_rproc_get_firmware(struct platform_device *pdev) |
1118 | { |
1119 | const char *fw_name; |
1120 | int ret; |
1121 | |
1122 | ret = of_property_read_string(np: pdev->dev.of_node, propname: "firmware-name" , |
1123 | out_string: &fw_name); |
1124 | if (ret) |
1125 | return ERR_PTR(error: ret); |
1126 | |
1127 | return fw_name; |
1128 | } |
1129 | |
1130 | static int omap_rproc_get_boot_data(struct platform_device *pdev, |
1131 | struct rproc *rproc) |
1132 | { |
1133 | struct device_node *np = pdev->dev.of_node; |
1134 | struct omap_rproc *oproc = rproc->priv; |
1135 | const struct omap_rproc_dev_data *data; |
1136 | int ret; |
1137 | |
1138 | data = of_device_get_match_data(dev: &pdev->dev); |
1139 | if (!data) |
1140 | return -ENODEV; |
1141 | |
1142 | if (!of_property_read_bool(np, propname: "ti,bootreg" )) |
1143 | return 0; |
1144 | |
1145 | oproc->boot_data = devm_kzalloc(dev: &pdev->dev, size: sizeof(*oproc->boot_data), |
1146 | GFP_KERNEL); |
1147 | if (!oproc->boot_data) |
1148 | return -ENOMEM; |
1149 | |
1150 | oproc->boot_data->syscon = |
1151 | syscon_regmap_lookup_by_phandle(np, property: "ti,bootreg" ); |
1152 | if (IS_ERR(ptr: oproc->boot_data->syscon)) { |
1153 | ret = PTR_ERR(ptr: oproc->boot_data->syscon); |
1154 | return ret; |
1155 | } |
1156 | |
1157 | if (of_property_read_u32_index(np, propname: "ti,bootreg" , index: 1, |
1158 | out_value: &oproc->boot_data->boot_reg)) { |
1159 | dev_err(&pdev->dev, "couldn't get the boot register\n" ); |
1160 | return -EINVAL; |
1161 | } |
1162 | |
1163 | of_property_read_u32_index(np, propname: "ti,bootreg" , index: 2, |
1164 | out_value: &oproc->boot_data->boot_reg_shift); |
1165 | |
1166 | return 0; |
1167 | } |
1168 | |
1169 | static int omap_rproc_of_get_internal_memories(struct platform_device *pdev, |
1170 | struct rproc *rproc) |
1171 | { |
1172 | struct omap_rproc *oproc = rproc->priv; |
1173 | struct device *dev = &pdev->dev; |
1174 | const struct omap_rproc_dev_data *data; |
1175 | struct resource *res; |
1176 | int num_mems; |
1177 | int i; |
1178 | |
1179 | data = of_device_get_match_data(dev); |
1180 | if (!data) |
1181 | return -ENODEV; |
1182 | |
1183 | if (!data->mems) |
1184 | return 0; |
1185 | |
1186 | num_mems = of_property_count_elems_of_size(np: dev->of_node, propname: "reg" , |
1187 | elem_size: sizeof(u32)) / 2; |
1188 | |
1189 | oproc->mem = devm_kcalloc(dev, n: num_mems, size: sizeof(*oproc->mem), |
1190 | GFP_KERNEL); |
1191 | if (!oproc->mem) |
1192 | return -ENOMEM; |
1193 | |
1194 | for (i = 0; data->mems[i].name; i++) { |
1195 | res = platform_get_resource_byname(pdev, IORESOURCE_MEM, |
1196 | data->mems[i].name); |
1197 | if (!res) { |
1198 | dev_err(dev, "no memory defined for %s\n" , |
1199 | data->mems[i].name); |
1200 | return -ENOMEM; |
1201 | } |
1202 | oproc->mem[i].cpu_addr = devm_ioremap_resource(dev, res); |
1203 | if (IS_ERR(ptr: oproc->mem[i].cpu_addr)) { |
1204 | dev_err(dev, "failed to parse and map %s memory\n" , |
1205 | data->mems[i].name); |
1206 | return PTR_ERR(ptr: oproc->mem[i].cpu_addr); |
1207 | } |
1208 | oproc->mem[i].bus_addr = res->start; |
1209 | oproc->mem[i].dev_addr = data->mems[i].dev_addr; |
1210 | oproc->mem[i].size = resource_size(res); |
1211 | |
1212 | dev_dbg(dev, "memory %8s: bus addr %pa size 0x%x va %pK da 0x%x\n" , |
1213 | data->mems[i].name, &oproc->mem[i].bus_addr, |
1214 | oproc->mem[i].size, oproc->mem[i].cpu_addr, |
1215 | oproc->mem[i].dev_addr); |
1216 | } |
1217 | oproc->num_mems = num_mems; |
1218 | |
1219 | return 0; |
1220 | } |
1221 | |
1222 | #ifdef CONFIG_OMAP_REMOTEPROC_WATCHDOG |
1223 | static int omap_rproc_count_wdog_timers(struct device *dev) |
1224 | { |
1225 | struct device_node *np = dev->of_node; |
1226 | int ret; |
1227 | |
1228 | ret = of_count_phandle_with_args(np, "ti,watchdog-timers" , NULL); |
1229 | if (ret <= 0) { |
1230 | dev_dbg(dev, "device does not have watchdog timers, status = %d\n" , |
1231 | ret); |
1232 | ret = 0; |
1233 | } |
1234 | |
1235 | return ret; |
1236 | } |
1237 | #else |
1238 | static int omap_rproc_count_wdog_timers(struct device *dev) |
1239 | { |
1240 | return 0; |
1241 | } |
1242 | #endif |
1243 | |
1244 | static int omap_rproc_of_get_timers(struct platform_device *pdev, |
1245 | struct rproc *rproc) |
1246 | { |
1247 | struct device_node *np = pdev->dev.of_node; |
1248 | struct omap_rproc *oproc = rproc->priv; |
1249 | struct device *dev = &pdev->dev; |
1250 | int num_timers; |
1251 | |
1252 | /* |
1253 | * Timer nodes are directly used in client nodes as phandles, so |
1254 | * retrieve the count using appropriate size |
1255 | */ |
1256 | oproc->num_timers = of_count_phandle_with_args(np, list_name: "ti,timers" , NULL); |
1257 | if (oproc->num_timers <= 0) { |
1258 | dev_dbg(dev, "device does not have timers, status = %d\n" , |
1259 | oproc->num_timers); |
1260 | oproc->num_timers = 0; |
1261 | } |
1262 | |
1263 | oproc->num_wd_timers = omap_rproc_count_wdog_timers(dev); |
1264 | |
1265 | num_timers = oproc->num_timers + oproc->num_wd_timers; |
1266 | if (num_timers) { |
1267 | oproc->timers = devm_kcalloc(dev, n: num_timers, |
1268 | size: sizeof(*oproc->timers), |
1269 | GFP_KERNEL); |
1270 | if (!oproc->timers) |
1271 | return -ENOMEM; |
1272 | |
1273 | dev_dbg(dev, "device has %d tick timers and %d watchdog timers\n" , |
1274 | oproc->num_timers, oproc->num_wd_timers); |
1275 | } |
1276 | |
1277 | return 0; |
1278 | } |
1279 | |
1280 | static int omap_rproc_probe(struct platform_device *pdev) |
1281 | { |
1282 | struct device_node *np = pdev->dev.of_node; |
1283 | struct omap_rproc *oproc; |
1284 | struct rproc *rproc; |
1285 | const char *firmware; |
1286 | int ret; |
1287 | struct reset_control *reset; |
1288 | |
1289 | if (!np) { |
1290 | dev_err(&pdev->dev, "only DT-based devices are supported\n" ); |
1291 | return -ENODEV; |
1292 | } |
1293 | |
1294 | reset = devm_reset_control_array_get_exclusive(dev: &pdev->dev); |
1295 | if (IS_ERR(ptr: reset)) |
1296 | return PTR_ERR(ptr: reset); |
1297 | |
1298 | firmware = omap_rproc_get_firmware(pdev); |
1299 | if (IS_ERR(ptr: firmware)) |
1300 | return PTR_ERR(ptr: firmware); |
1301 | |
1302 | ret = dma_set_coherent_mask(dev: &pdev->dev, DMA_BIT_MASK(32)); |
1303 | if (ret) { |
1304 | dev_err(&pdev->dev, "dma_set_coherent_mask: %d\n" , ret); |
1305 | return ret; |
1306 | } |
1307 | |
1308 | rproc = rproc_alloc(dev: &pdev->dev, name: dev_name(dev: &pdev->dev), ops: &omap_rproc_ops, |
1309 | firmware, len: sizeof(*oproc)); |
1310 | if (!rproc) |
1311 | return -ENOMEM; |
1312 | |
1313 | oproc = rproc->priv; |
1314 | oproc->rproc = rproc; |
1315 | oproc->reset = reset; |
1316 | /* All existing OMAP IPU and DSP processors have an MMU */ |
1317 | rproc->has_iommu = true; |
1318 | |
1319 | ret = omap_rproc_of_get_internal_memories(pdev, rproc); |
1320 | if (ret) |
1321 | goto free_rproc; |
1322 | |
1323 | ret = omap_rproc_get_boot_data(pdev, rproc); |
1324 | if (ret) |
1325 | goto free_rproc; |
1326 | |
1327 | ret = omap_rproc_of_get_timers(pdev, rproc); |
1328 | if (ret) |
1329 | goto free_rproc; |
1330 | |
1331 | init_completion(x: &oproc->pm_comp); |
1332 | oproc->autosuspend_delay = DEFAULT_AUTOSUSPEND_DELAY; |
1333 | |
1334 | of_property_read_u32(np: pdev->dev.of_node, propname: "ti,autosuspend-delay-ms" , |
1335 | out_value: &oproc->autosuspend_delay); |
1336 | |
1337 | pm_runtime_set_autosuspend_delay(dev: &pdev->dev, delay: oproc->autosuspend_delay); |
1338 | |
1339 | oproc->fck = devm_clk_get(dev: &pdev->dev, id: 0); |
1340 | if (IS_ERR(ptr: oproc->fck)) { |
1341 | ret = PTR_ERR(ptr: oproc->fck); |
1342 | goto free_rproc; |
1343 | } |
1344 | |
1345 | ret = of_reserved_mem_device_init(dev: &pdev->dev); |
1346 | if (ret) { |
1347 | dev_warn(&pdev->dev, "device does not have specific CMA pool.\n" ); |
1348 | dev_warn(&pdev->dev, "Typically this should be provided,\n" ); |
1349 | dev_warn(&pdev->dev, "only omit if you know what you are doing.\n" ); |
1350 | } |
1351 | |
1352 | platform_set_drvdata(pdev, data: rproc); |
1353 | |
1354 | ret = rproc_add(rproc); |
1355 | if (ret) |
1356 | goto release_mem; |
1357 | |
1358 | return 0; |
1359 | |
1360 | release_mem: |
1361 | of_reserved_mem_device_release(dev: &pdev->dev); |
1362 | free_rproc: |
1363 | rproc_free(rproc); |
1364 | return ret; |
1365 | } |
1366 | |
1367 | static void omap_rproc_remove(struct platform_device *pdev) |
1368 | { |
1369 | struct rproc *rproc = platform_get_drvdata(pdev); |
1370 | |
1371 | rproc_del(rproc); |
1372 | rproc_free(rproc); |
1373 | of_reserved_mem_device_release(dev: &pdev->dev); |
1374 | } |
1375 | |
1376 | static const struct dev_pm_ops omap_rproc_pm_ops = { |
1377 | SET_SYSTEM_SLEEP_PM_OPS(omap_rproc_suspend, omap_rproc_resume) |
1378 | SET_RUNTIME_PM_OPS(omap_rproc_runtime_suspend, |
1379 | omap_rproc_runtime_resume, NULL) |
1380 | }; |
1381 | |
1382 | static struct platform_driver omap_rproc_driver = { |
1383 | .probe = omap_rproc_probe, |
1384 | .remove_new = omap_rproc_remove, |
1385 | .driver = { |
1386 | .name = "omap-rproc" , |
1387 | .pm = &omap_rproc_pm_ops, |
1388 | .of_match_table = omap_rproc_of_match, |
1389 | }, |
1390 | }; |
1391 | |
1392 | module_platform_driver(omap_rproc_driver); |
1393 | |
1394 | MODULE_LICENSE("GPL v2" ); |
1395 | MODULE_DESCRIPTION("OMAP Remote Processor control driver" ); |
1396 | |