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13140de0 FD |
1 | // SPDX-License-Identifier: GPL-2.0 |
2 | /* | |
3 | * Copyright (C) STMicroelectronics 2018 - All Rights Reserved | |
4 | * Authors: Ludovic Barre <ludovic.barre@st.com> for STMicroelectronics. | |
5 | * Fabien Dessenne <fabien.dessenne@st.com> for STMicroelectronics. | |
6 | */ | |
7 | ||
8 | #include <linux/arm-smccc.h> | |
9 | #include <linux/dma-mapping.h> | |
10 | #include <linux/interrupt.h> | |
11 | #include <linux/io.h> | |
12 | #include <linux/mailbox_client.h> | |
13 | #include <linux/mfd/syscon.h> | |
14 | #include <linux/module.h> | |
15 | #include <linux/of_address.h> | |
16 | #include <linux/of_device.h> | |
17 | #include <linux/of_reserved_mem.h> | |
410119ee | 18 | #include <linux/pm_wakeirq.h> |
13140de0 FD |
19 | #include <linux/regmap.h> |
20 | #include <linux/remoteproc.h> | |
21 | #include <linux/reset.h> | |
bf02bd9a | 22 | #include <linux/slab.h> |
714cf5e3 | 23 | #include <linux/workqueue.h> |
13140de0 FD |
24 | |
25 | #include "remoteproc_internal.h" | |
26 | ||
27 | #define HOLD_BOOT 0 | |
28 | #define RELEASE_BOOT 1 | |
29 | ||
30 | #define MBOX_NB_VQ 2 | |
31 | #define MBOX_NB_MBX 3 | |
32 | ||
33 | #define STM32_SMC_RCC 0x82001000 | |
34 | #define STM32_SMC_REG_WRITE 0x1 | |
35 | ||
36 | #define STM32_MBX_VQ0 "vq0" | |
714cf5e3 | 37 | #define STM32_MBX_VQ0_ID 0 |
13140de0 | 38 | #define STM32_MBX_VQ1 "vq1" |
714cf5e3 | 39 | #define STM32_MBX_VQ1_ID 1 |
13140de0 FD |
40 | #define STM32_MBX_SHUTDOWN "shutdown" |
41 | ||
42 | struct stm32_syscon { | |
43 | struct regmap *map; | |
44 | u32 reg; | |
45 | u32 mask; | |
46 | }; | |
47 | ||
48 | struct stm32_rproc_mem { | |
49 | char name[20]; | |
50 | void __iomem *cpu_addr; | |
51 | phys_addr_t bus_addr; | |
52 | u32 dev_addr; | |
53 | size_t size; | |
54 | }; | |
55 | ||
56 | struct stm32_rproc_mem_ranges { | |
57 | u32 dev_addr; | |
58 | u32 bus_addr; | |
59 | u32 size; | |
60 | }; | |
61 | ||
62 | struct stm32_mbox { | |
63 | const unsigned char name[10]; | |
64 | struct mbox_chan *chan; | |
65 | struct mbox_client client; | |
714cf5e3 | 66 | struct work_struct vq_work; |
13140de0 FD |
67 | int vq_id; |
68 | }; | |
69 | ||
70 | struct stm32_rproc { | |
71 | struct reset_control *rst; | |
72 | struct stm32_syscon hold_boot; | |
73 | struct stm32_syscon pdds; | |
410119ee | 74 | int wdg_irq; |
13140de0 FD |
75 | u32 nb_rmems; |
76 | struct stm32_rproc_mem *rmems; | |
77 | struct stm32_mbox mb[MBOX_NB_MBX]; | |
714cf5e3 | 78 | struct workqueue_struct *workqueue; |
13140de0 FD |
79 | bool secured_soc; |
80 | }; | |
81 | ||
82 | static int stm32_rproc_pa_to_da(struct rproc *rproc, phys_addr_t pa, u64 *da) | |
83 | { | |
84 | unsigned int i; | |
85 | struct stm32_rproc *ddata = rproc->priv; | |
86 | struct stm32_rproc_mem *p_mem; | |
87 | ||
88 | for (i = 0; i < ddata->nb_rmems; i++) { | |
89 | p_mem = &ddata->rmems[i]; | |
90 | ||
91 | if (pa < p_mem->bus_addr || | |
92 | pa >= p_mem->bus_addr + p_mem->size) | |
93 | continue; | |
94 | *da = pa - p_mem->bus_addr + p_mem->dev_addr; | |
95 | dev_dbg(rproc->dev.parent, "pa %pa to da %llx\n", &pa, *da); | |
96 | return 0; | |
97 | } | |
98 | ||
99 | return -EINVAL; | |
100 | } | |
101 | ||
102 | static int stm32_rproc_mem_alloc(struct rproc *rproc, | |
103 | struct rproc_mem_entry *mem) | |
104 | { | |
105 | struct device *dev = rproc->dev.parent; | |
106 | void *va; | |
107 | ||
108 | dev_dbg(dev, "map memory: %pa+%x\n", &mem->dma, mem->len); | |
109 | va = ioremap_wc(mem->dma, mem->len); | |
110 | if (IS_ERR_OR_NULL(va)) { | |
111 | dev_err(dev, "Unable to map memory region: %pa+%x\n", | |
112 | &mem->dma, mem->len); | |
113 | return -ENOMEM; | |
114 | } | |
115 | ||
116 | /* Update memory entry va */ | |
117 | mem->va = va; | |
118 | ||
119 | return 0; | |
120 | } | |
121 | ||
122 | static int stm32_rproc_mem_release(struct rproc *rproc, | |
123 | struct rproc_mem_entry *mem) | |
124 | { | |
125 | dev_dbg(rproc->dev.parent, "unmap memory: %pa\n", &mem->dma); | |
126 | iounmap(mem->va); | |
127 | ||
128 | return 0; | |
129 | } | |
130 | ||
131 | static int stm32_rproc_of_memory_translations(struct rproc *rproc) | |
132 | { | |
133 | struct device *parent, *dev = rproc->dev.parent; | |
134 | struct stm32_rproc *ddata = rproc->priv; | |
135 | struct device_node *np; | |
136 | struct stm32_rproc_mem *p_mems; | |
137 | struct stm32_rproc_mem_ranges *mem_range; | |
138 | int cnt, array_size, i, ret = 0; | |
139 | ||
140 | parent = dev->parent; | |
141 | np = parent->of_node; | |
142 | ||
143 | cnt = of_property_count_elems_of_size(np, "dma-ranges", | |
144 | sizeof(*mem_range)); | |
145 | if (cnt <= 0) { | |
146 | dev_err(dev, "%s: dma-ranges property not defined\n", __func__); | |
147 | return -EINVAL; | |
148 | } | |
149 | ||
150 | p_mems = devm_kcalloc(dev, cnt, sizeof(*p_mems), GFP_KERNEL); | |
151 | if (!p_mems) | |
152 | return -ENOMEM; | |
153 | mem_range = kcalloc(cnt, sizeof(*mem_range), GFP_KERNEL); | |
154 | if (!mem_range) | |
155 | return -ENOMEM; | |
156 | ||
157 | array_size = cnt * sizeof(struct stm32_rproc_mem_ranges) / sizeof(u32); | |
158 | ||
159 | ret = of_property_read_u32_array(np, "dma-ranges", | |
160 | (u32 *)mem_range, array_size); | |
161 | if (ret) { | |
162 | dev_err(dev, "error while get dma-ranges property: %x\n", ret); | |
163 | goto free_mem; | |
164 | } | |
165 | ||
166 | for (i = 0; i < cnt; i++) { | |
167 | p_mems[i].bus_addr = mem_range[i].bus_addr; | |
168 | p_mems[i].dev_addr = mem_range[i].dev_addr; | |
169 | p_mems[i].size = mem_range[i].size; | |
170 | ||
171 | dev_dbg(dev, "memory range[%i]: da %#x, pa %pa, size %#zx:\n", | |
172 | i, p_mems[i].dev_addr, &p_mems[i].bus_addr, | |
173 | p_mems[i].size); | |
174 | } | |
175 | ||
176 | ddata->rmems = p_mems; | |
177 | ddata->nb_rmems = cnt; | |
178 | ||
179 | free_mem: | |
180 | kfree(mem_range); | |
181 | return ret; | |
182 | } | |
183 | ||
184 | static int stm32_rproc_mbox_idx(struct rproc *rproc, const unsigned char *name) | |
185 | { | |
186 | struct stm32_rproc *ddata = rproc->priv; | |
187 | int i; | |
188 | ||
189 | for (i = 0; i < ARRAY_SIZE(ddata->mb); i++) { | |
190 | if (!strncmp(ddata->mb[i].name, name, strlen(name))) | |
191 | return i; | |
192 | } | |
193 | dev_err(&rproc->dev, "mailbox %s not found\n", name); | |
194 | ||
195 | return -EINVAL; | |
196 | } | |
197 | ||
198 | static int stm32_rproc_elf_load_rsc_table(struct rproc *rproc, | |
199 | const struct firmware *fw) | |
200 | { | |
201 | if (rproc_elf_load_rsc_table(rproc, fw)) | |
202 | dev_warn(&rproc->dev, "no resource table found for this firmware\n"); | |
203 | ||
204 | return 0; | |
205 | } | |
206 | ||
207 | static int stm32_rproc_parse_fw(struct rproc *rproc, const struct firmware *fw) | |
208 | { | |
209 | struct device *dev = rproc->dev.parent; | |
210 | struct device_node *np = dev->of_node; | |
211 | struct of_phandle_iterator it; | |
212 | struct rproc_mem_entry *mem; | |
213 | struct reserved_mem *rmem; | |
214 | u64 da; | |
215 | int index = 0; | |
216 | ||
217 | /* Register associated reserved memory regions */ | |
218 | of_phandle_iterator_init(&it, np, "memory-region", NULL, 0); | |
219 | while (of_phandle_iterator_next(&it) == 0) { | |
220 | rmem = of_reserved_mem_lookup(it.node); | |
221 | if (!rmem) { | |
222 | dev_err(dev, "unable to acquire memory-region\n"); | |
223 | return -EINVAL; | |
224 | } | |
225 | ||
226 | if (stm32_rproc_pa_to_da(rproc, rmem->base, &da) < 0) { | |
227 | dev_err(dev, "memory region not valid %pa\n", | |
228 | &rmem->base); | |
229 | return -EINVAL; | |
230 | } | |
231 | ||
232 | /* No need to map vdev buffer */ | |
233 | if (strcmp(it.node->name, "vdev0buffer")) { | |
234 | /* Register memory region */ | |
235 | mem = rproc_mem_entry_init(dev, NULL, | |
236 | (dma_addr_t)rmem->base, | |
237 | rmem->size, da, | |
238 | stm32_rproc_mem_alloc, | |
239 | stm32_rproc_mem_release, | |
240 | it.node->name); | |
241 | ||
242 | if (mem) | |
243 | rproc_coredump_add_segment(rproc, da, | |
244 | rmem->size); | |
245 | } else { | |
246 | /* Register reserved memory for vdev buffer alloc */ | |
247 | mem = rproc_of_resm_mem_entry_init(dev, index, | |
248 | rmem->size, | |
249 | rmem->base, | |
250 | it.node->name); | |
251 | } | |
252 | ||
253 | if (!mem) | |
254 | return -ENOMEM; | |
255 | ||
256 | rproc_add_carveout(rproc, mem); | |
257 | index++; | |
258 | } | |
259 | ||
260 | return stm32_rproc_elf_load_rsc_table(rproc, fw); | |
261 | } | |
262 | ||
263 | static irqreturn_t stm32_rproc_wdg(int irq, void *data) | |
264 | { | |
265 | struct rproc *rproc = data; | |
266 | ||
267 | rproc_report_crash(rproc, RPROC_WATCHDOG); | |
268 | ||
269 | return IRQ_HANDLED; | |
270 | } | |
271 | ||
714cf5e3 AP |
272 | static void stm32_rproc_mb_vq_work(struct work_struct *work) |
273 | { | |
274 | struct stm32_mbox *mb = container_of(work, struct stm32_mbox, vq_work); | |
275 | struct rproc *rproc = dev_get_drvdata(mb->client.dev); | |
276 | ||
277 | if (rproc_vq_interrupt(rproc, mb->vq_id) == IRQ_NONE) | |
278 | dev_dbg(&rproc->dev, "no message found in vq%d\n", mb->vq_id); | |
279 | } | |
280 | ||
13140de0 FD |
281 | static void stm32_rproc_mb_callback(struct mbox_client *cl, void *data) |
282 | { | |
283 | struct rproc *rproc = dev_get_drvdata(cl->dev); | |
284 | struct stm32_mbox *mb = container_of(cl, struct stm32_mbox, client); | |
714cf5e3 | 285 | struct stm32_rproc *ddata = rproc->priv; |
13140de0 | 286 | |
714cf5e3 | 287 | queue_work(ddata->workqueue, &mb->vq_work); |
13140de0 FD |
288 | } |
289 | ||
290 | static void stm32_rproc_free_mbox(struct rproc *rproc) | |
291 | { | |
292 | struct stm32_rproc *ddata = rproc->priv; | |
293 | unsigned int i; | |
294 | ||
295 | for (i = 0; i < ARRAY_SIZE(ddata->mb); i++) { | |
296 | if (ddata->mb[i].chan) | |
297 | mbox_free_channel(ddata->mb[i].chan); | |
298 | ddata->mb[i].chan = NULL; | |
299 | } | |
300 | } | |
301 | ||
302 | static const struct stm32_mbox stm32_rproc_mbox[MBOX_NB_MBX] = { | |
303 | { | |
304 | .name = STM32_MBX_VQ0, | |
714cf5e3 | 305 | .vq_id = STM32_MBX_VQ0_ID, |
13140de0 FD |
306 | .client = { |
307 | .rx_callback = stm32_rproc_mb_callback, | |
308 | .tx_block = false, | |
309 | }, | |
310 | }, | |
311 | { | |
312 | .name = STM32_MBX_VQ1, | |
714cf5e3 | 313 | .vq_id = STM32_MBX_VQ1_ID, |
13140de0 FD |
314 | .client = { |
315 | .rx_callback = stm32_rproc_mb_callback, | |
316 | .tx_block = false, | |
317 | }, | |
318 | }, | |
319 | { | |
320 | .name = STM32_MBX_SHUTDOWN, | |
321 | .vq_id = -1, | |
322 | .client = { | |
323 | .tx_block = true, | |
324 | .tx_done = NULL, | |
325 | .tx_tout = 500, /* 500 ms time out */ | |
326 | }, | |
327 | } | |
328 | }; | |
329 | ||
4a56e423 | 330 | static int stm32_rproc_request_mbox(struct rproc *rproc) |
13140de0 FD |
331 | { |
332 | struct stm32_rproc *ddata = rproc->priv; | |
333 | struct device *dev = &rproc->dev; | |
334 | unsigned int i; | |
4a56e423 | 335 | int j; |
13140de0 FD |
336 | const unsigned char *name; |
337 | struct mbox_client *cl; | |
338 | ||
339 | /* Initialise mailbox structure table */ | |
340 | memcpy(ddata->mb, stm32_rproc_mbox, sizeof(stm32_rproc_mbox)); | |
341 | ||
342 | for (i = 0; i < MBOX_NB_MBX; i++) { | |
343 | name = ddata->mb[i].name; | |
344 | ||
345 | cl = &ddata->mb[i].client; | |
346 | cl->dev = dev->parent; | |
347 | ||
348 | ddata->mb[i].chan = mbox_request_channel_byname(cl, name); | |
349 | if (IS_ERR(ddata->mb[i].chan)) { | |
4a56e423 FD |
350 | if (PTR_ERR(ddata->mb[i].chan) == -EPROBE_DEFER) |
351 | goto err_probe; | |
13140de0 FD |
352 | dev_warn(dev, "cannot get %s mbox\n", name); |
353 | ddata->mb[i].chan = NULL; | |
354 | } | |
714cf5e3 AP |
355 | if (ddata->mb[i].vq_id >= 0) { |
356 | INIT_WORK(&ddata->mb[i].vq_work, | |
357 | stm32_rproc_mb_vq_work); | |
358 | } | |
13140de0 | 359 | } |
4a56e423 FD |
360 | |
361 | return 0; | |
362 | ||
363 | err_probe: | |
364 | for (j = i - 1; j >= 0; j--) | |
365 | if (ddata->mb[j].chan) | |
366 | mbox_free_channel(ddata->mb[j].chan); | |
367 | return -EPROBE_DEFER; | |
13140de0 FD |
368 | } |
369 | ||
370 | static int stm32_rproc_set_hold_boot(struct rproc *rproc, bool hold) | |
371 | { | |
372 | struct stm32_rproc *ddata = rproc->priv; | |
373 | struct stm32_syscon hold_boot = ddata->hold_boot; | |
374 | struct arm_smccc_res smc_res; | |
375 | int val, err; | |
376 | ||
377 | val = hold ? HOLD_BOOT : RELEASE_BOOT; | |
378 | ||
93f1d3e4 | 379 | if (IS_ENABLED(CONFIG_HAVE_ARM_SMCCC) && ddata->secured_soc) { |
13140de0 FD |
380 | arm_smccc_smc(STM32_SMC_RCC, STM32_SMC_REG_WRITE, |
381 | hold_boot.reg, val, 0, 0, 0, 0, &smc_res); | |
382 | err = smc_res.a0; | |
383 | } else { | |
384 | err = regmap_update_bits(hold_boot.map, hold_boot.reg, | |
385 | hold_boot.mask, val); | |
386 | } | |
387 | ||
388 | if (err) | |
389 | dev_err(&rproc->dev, "failed to set hold boot\n"); | |
390 | ||
391 | return err; | |
392 | } | |
393 | ||
394 | static void stm32_rproc_add_coredump_trace(struct rproc *rproc) | |
395 | { | |
396 | struct rproc_debug_trace *trace; | |
397 | struct rproc_dump_segment *segment; | |
398 | bool already_added; | |
399 | ||
400 | list_for_each_entry(trace, &rproc->traces, node) { | |
401 | already_added = false; | |
402 | ||
403 | list_for_each_entry(segment, &rproc->dump_segments, node) { | |
404 | if (segment->da == trace->trace_mem.da) { | |
405 | already_added = true; | |
406 | break; | |
407 | } | |
408 | } | |
409 | ||
410 | if (!already_added) | |
411 | rproc_coredump_add_segment(rproc, trace->trace_mem.da, | |
412 | trace->trace_mem.len); | |
413 | } | |
414 | } | |
415 | ||
416 | static int stm32_rproc_start(struct rproc *rproc) | |
417 | { | |
abbe429d | 418 | struct stm32_rproc *ddata = rproc->priv; |
13140de0 FD |
419 | int err; |
420 | ||
421 | stm32_rproc_add_coredump_trace(rproc); | |
422 | ||
abbe429d FD |
423 | /* clear remote proc Deep Sleep */ |
424 | if (ddata->pdds.map) { | |
425 | err = regmap_update_bits(ddata->pdds.map, ddata->pdds.reg, | |
426 | ddata->pdds.mask, 0); | |
427 | if (err) { | |
428 | dev_err(&rproc->dev, "failed to clear pdds\n"); | |
429 | return err; | |
430 | } | |
431 | } | |
432 | ||
13140de0 FD |
433 | err = stm32_rproc_set_hold_boot(rproc, false); |
434 | if (err) | |
435 | return err; | |
436 | ||
437 | return stm32_rproc_set_hold_boot(rproc, true); | |
438 | } | |
439 | ||
440 | static int stm32_rproc_stop(struct rproc *rproc) | |
441 | { | |
442 | struct stm32_rproc *ddata = rproc->priv; | |
443 | int err, dummy_data, idx; | |
444 | ||
445 | /* request shutdown of the remote processor */ | |
446 | if (rproc->state != RPROC_OFFLINE) { | |
447 | idx = stm32_rproc_mbox_idx(rproc, STM32_MBX_SHUTDOWN); | |
448 | if (idx >= 0 && ddata->mb[idx].chan) { | |
449 | /* a dummy data is sent to allow to block on transmit */ | |
450 | err = mbox_send_message(ddata->mb[idx].chan, | |
451 | &dummy_data); | |
452 | if (err < 0) | |
453 | dev_warn(&rproc->dev, "warning: remote FW shutdown without ack\n"); | |
454 | } | |
455 | } | |
456 | ||
457 | err = stm32_rproc_set_hold_boot(rproc, true); | |
458 | if (err) | |
459 | return err; | |
460 | ||
461 | err = reset_control_assert(ddata->rst); | |
462 | if (err) { | |
463 | dev_err(&rproc->dev, "failed to assert the reset\n"); | |
464 | return err; | |
465 | } | |
466 | ||
467 | /* to allow platform Standby power mode, set remote proc Deep Sleep */ | |
468 | if (ddata->pdds.map) { | |
469 | err = regmap_update_bits(ddata->pdds.map, ddata->pdds.reg, | |
470 | ddata->pdds.mask, 1); | |
471 | if (err) { | |
472 | dev_err(&rproc->dev, "failed to set pdds\n"); | |
473 | return err; | |
474 | } | |
475 | } | |
476 | ||
477 | return 0; | |
478 | } | |
479 | ||
480 | static void stm32_rproc_kick(struct rproc *rproc, int vqid) | |
481 | { | |
482 | struct stm32_rproc *ddata = rproc->priv; | |
483 | unsigned int i; | |
484 | int err; | |
485 | ||
486 | if (WARN_ON(vqid >= MBOX_NB_VQ)) | |
487 | return; | |
488 | ||
489 | for (i = 0; i < MBOX_NB_MBX; i++) { | |
490 | if (vqid != ddata->mb[i].vq_id) | |
491 | continue; | |
492 | if (!ddata->mb[i].chan) | |
493 | return; | |
494 | err = mbox_send_message(ddata->mb[i].chan, (void *)(long)vqid); | |
495 | if (err < 0) | |
496 | dev_err(&rproc->dev, "%s: failed (%s, err:%d)\n", | |
497 | __func__, ddata->mb[i].name, err); | |
498 | return; | |
499 | } | |
500 | } | |
501 | ||
502 | static struct rproc_ops st_rproc_ops = { | |
503 | .start = stm32_rproc_start, | |
504 | .stop = stm32_rproc_stop, | |
505 | .kick = stm32_rproc_kick, | |
506 | .load = rproc_elf_load_segments, | |
507 | .parse_fw = stm32_rproc_parse_fw, | |
508 | .find_loaded_rsc_table = rproc_elf_find_loaded_rsc_table, | |
e29ff72b | 509 | .sanity_check = rproc_elf_sanity_check, |
13140de0 FD |
510 | .get_boot_addr = rproc_elf_get_boot_addr, |
511 | }; | |
512 | ||
513 | static const struct of_device_id stm32_rproc_match[] = { | |
514 | { .compatible = "st,stm32mp1-m4" }, | |
515 | {}, | |
516 | }; | |
517 | MODULE_DEVICE_TABLE(of, stm32_rproc_match); | |
518 | ||
519 | static int stm32_rproc_get_syscon(struct device_node *np, const char *prop, | |
520 | struct stm32_syscon *syscon) | |
521 | { | |
522 | int err = 0; | |
523 | ||
524 | syscon->map = syscon_regmap_lookup_by_phandle(np, prop); | |
525 | if (IS_ERR(syscon->map)) { | |
526 | err = PTR_ERR(syscon->map); | |
527 | syscon->map = NULL; | |
528 | goto out; | |
529 | } | |
530 | ||
531 | err = of_property_read_u32_index(np, prop, 1, &syscon->reg); | |
532 | if (err) | |
533 | goto out; | |
534 | ||
535 | err = of_property_read_u32_index(np, prop, 2, &syscon->mask); | |
536 | ||
537 | out: | |
538 | return err; | |
539 | } | |
540 | ||
541 | static int stm32_rproc_parse_dt(struct platform_device *pdev) | |
542 | { | |
543 | struct device *dev = &pdev->dev; | |
544 | struct device_node *np = dev->of_node; | |
545 | struct rproc *rproc = platform_get_drvdata(pdev); | |
546 | struct stm32_rproc *ddata = rproc->priv; | |
547 | struct stm32_syscon tz; | |
548 | unsigned int tzen; | |
549 | int err, irq; | |
550 | ||
551 | irq = platform_get_irq(pdev, 0); | |
d333de37 FD |
552 | if (irq == -EPROBE_DEFER) |
553 | return -EPROBE_DEFER; | |
554 | ||
13140de0 FD |
555 | if (irq > 0) { |
556 | err = devm_request_irq(dev, irq, stm32_rproc_wdg, 0, | |
557 | dev_name(dev), rproc); | |
558 | if (err) { | |
559 | dev_err(dev, "failed to request wdg irq\n"); | |
560 | return err; | |
561 | } | |
562 | ||
410119ee FD |
563 | ddata->wdg_irq = irq; |
564 | ||
565 | if (of_property_read_bool(np, "wakeup-source")) { | |
566 | device_init_wakeup(dev, true); | |
567 | dev_pm_set_wake_irq(dev, irq); | |
568 | } | |
569 | ||
13140de0 FD |
570 | dev_info(dev, "wdg irq registered\n"); |
571 | } | |
572 | ||
573 | ddata->rst = devm_reset_control_get_by_index(dev, 0); | |
574 | if (IS_ERR(ddata->rst)) { | |
575 | dev_err(dev, "failed to get mcu reset\n"); | |
576 | return PTR_ERR(ddata->rst); | |
577 | } | |
578 | ||
579 | /* | |
580 | * if platform is secured the hold boot bit must be written by | |
581 | * smc call and read normally. | |
582 | * if not secure the hold boot bit could be read/write normally | |
583 | */ | |
584 | err = stm32_rproc_get_syscon(np, "st,syscfg-tz", &tz); | |
585 | if (err) { | |
586 | dev_err(dev, "failed to get tz syscfg\n"); | |
587 | return err; | |
588 | } | |
589 | ||
590 | err = regmap_read(tz.map, tz.reg, &tzen); | |
591 | if (err) { | |
592 | dev_err(&rproc->dev, "failed to read tzen\n"); | |
593 | return err; | |
594 | } | |
595 | ddata->secured_soc = tzen & tz.mask; | |
596 | ||
597 | err = stm32_rproc_get_syscon(np, "st,syscfg-holdboot", | |
598 | &ddata->hold_boot); | |
599 | if (err) { | |
600 | dev_err(dev, "failed to get hold boot\n"); | |
601 | return err; | |
602 | } | |
603 | ||
604 | err = stm32_rproc_get_syscon(np, "st,syscfg-pdds", &ddata->pdds); | |
605 | if (err) | |
b1f0fa86 | 606 | dev_info(dev, "failed to get pdds\n"); |
13140de0 FD |
607 | |
608 | rproc->auto_boot = of_property_read_bool(np, "st,auto-boot"); | |
609 | ||
610 | return stm32_rproc_of_memory_translations(rproc); | |
611 | } | |
612 | ||
613 | static int stm32_rproc_probe(struct platform_device *pdev) | |
614 | { | |
615 | struct device *dev = &pdev->dev; | |
616 | struct stm32_rproc *ddata; | |
617 | struct device_node *np = dev->of_node; | |
618 | struct rproc *rproc; | |
619 | int ret; | |
620 | ||
621 | ret = dma_coerce_mask_and_coherent(dev, DMA_BIT_MASK(32)); | |
622 | if (ret) | |
623 | return ret; | |
624 | ||
625 | rproc = rproc_alloc(dev, np->name, &st_rproc_ops, NULL, sizeof(*ddata)); | |
626 | if (!rproc) | |
627 | return -ENOMEM; | |
628 | ||
3898fc99 | 629 | rproc_coredump_set_elf_info(rproc, ELFCLASS32, EM_NONE); |
13140de0 FD |
630 | rproc->has_iommu = false; |
631 | ddata = rproc->priv; | |
714cf5e3 AP |
632 | ddata->workqueue = create_workqueue(dev_name(dev)); |
633 | if (!ddata->workqueue) { | |
634 | dev_err(dev, "cannot create workqueue\n"); | |
635 | ret = -ENOMEM; | |
636 | goto free_rproc; | |
637 | } | |
13140de0 FD |
638 | |
639 | platform_set_drvdata(pdev, rproc); | |
640 | ||
641 | ret = stm32_rproc_parse_dt(pdev); | |
642 | if (ret) | |
714cf5e3 | 643 | goto free_wkq; |
13140de0 | 644 | |
4a56e423 FD |
645 | ret = stm32_rproc_request_mbox(rproc); |
646 | if (ret) | |
647 | goto free_rproc; | |
13140de0 FD |
648 | |
649 | ret = rproc_add(rproc); | |
650 | if (ret) | |
651 | goto free_mb; | |
652 | ||
653 | return 0; | |
654 | ||
655 | free_mb: | |
656 | stm32_rproc_free_mbox(rproc); | |
714cf5e3 AP |
657 | free_wkq: |
658 | destroy_workqueue(ddata->workqueue); | |
13140de0 | 659 | free_rproc: |
410119ee FD |
660 | if (device_may_wakeup(dev)) { |
661 | dev_pm_clear_wake_irq(dev); | |
662 | device_init_wakeup(dev, false); | |
663 | } | |
13140de0 FD |
664 | rproc_free(rproc); |
665 | return ret; | |
666 | } | |
667 | ||
668 | static int stm32_rproc_remove(struct platform_device *pdev) | |
669 | { | |
670 | struct rproc *rproc = platform_get_drvdata(pdev); | |
714cf5e3 | 671 | struct stm32_rproc *ddata = rproc->priv; |
410119ee | 672 | struct device *dev = &pdev->dev; |
13140de0 FD |
673 | |
674 | if (atomic_read(&rproc->power) > 0) | |
675 | rproc_shutdown(rproc); | |
676 | ||
677 | rproc_del(rproc); | |
678 | stm32_rproc_free_mbox(rproc); | |
714cf5e3 | 679 | destroy_workqueue(ddata->workqueue); |
410119ee FD |
680 | |
681 | if (device_may_wakeup(dev)) { | |
682 | dev_pm_clear_wake_irq(dev); | |
683 | device_init_wakeup(dev, false); | |
684 | } | |
13140de0 FD |
685 | rproc_free(rproc); |
686 | ||
687 | return 0; | |
688 | } | |
689 | ||
410119ee FD |
690 | static int __maybe_unused stm32_rproc_suspend(struct device *dev) |
691 | { | |
692 | struct rproc *rproc = dev_get_drvdata(dev); | |
693 | struct stm32_rproc *ddata = rproc->priv; | |
694 | ||
695 | if (device_may_wakeup(dev)) | |
696 | return enable_irq_wake(ddata->wdg_irq); | |
697 | ||
698 | return 0; | |
699 | } | |
700 | ||
701 | static int __maybe_unused stm32_rproc_resume(struct device *dev) | |
702 | { | |
703 | struct rproc *rproc = dev_get_drvdata(dev); | |
704 | struct stm32_rproc *ddata = rproc->priv; | |
705 | ||
706 | if (device_may_wakeup(dev)) | |
707 | return disable_irq_wake(ddata->wdg_irq); | |
708 | ||
709 | return 0; | |
710 | } | |
711 | ||
712 | static SIMPLE_DEV_PM_OPS(stm32_rproc_pm_ops, | |
713 | stm32_rproc_suspend, stm32_rproc_resume); | |
714 | ||
13140de0 FD |
715 | static struct platform_driver stm32_rproc_driver = { |
716 | .probe = stm32_rproc_probe, | |
717 | .remove = stm32_rproc_remove, | |
718 | .driver = { | |
719 | .name = "stm32-rproc", | |
410119ee | 720 | .pm = &stm32_rproc_pm_ops, |
13140de0 FD |
721 | .of_match_table = of_match_ptr(stm32_rproc_match), |
722 | }, | |
723 | }; | |
724 | module_platform_driver(stm32_rproc_driver); | |
725 | ||
726 | MODULE_DESCRIPTION("STM32 Remote Processor Control Driver"); | |
727 | MODULE_AUTHOR("Ludovic Barre <ludovic.barre@st.com>"); | |
728 | MODULE_AUTHOR("Fabien Dessenne <fabien.dessenne@st.com>"); | |
729 | MODULE_LICENSE("GPL v2"); | |
730 |