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