]>
Commit | Line | Data |
---|---|---|
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 | ||
11a7aaa7 MP |
42 | #define RSC_TBL_SIZE 1024 |
43 | ||
376ffdc0 MP |
44 | #define M4_STATE_OFF 0 |
45 | #define M4_STATE_INI 1 | |
46 | #define M4_STATE_CRUN 2 | |
47 | #define M4_STATE_CSTOP 3 | |
48 | #define M4_STATE_STANDBY 4 | |
49 | #define M4_STATE_CRASH 5 | |
50 | ||
13140de0 FD |
51 | struct stm32_syscon { |
52 | struct regmap *map; | |
53 | u32 reg; | |
54 | u32 mask; | |
55 | }; | |
56 | ||
57 | struct stm32_rproc_mem { | |
58 | char name[20]; | |
59 | void __iomem *cpu_addr; | |
60 | phys_addr_t bus_addr; | |
61 | u32 dev_addr; | |
62 | size_t size; | |
63 | }; | |
64 | ||
65 | struct stm32_rproc_mem_ranges { | |
66 | u32 dev_addr; | |
67 | u32 bus_addr; | |
68 | u32 size; | |
69 | }; | |
70 | ||
71 | struct stm32_mbox { | |
72 | const unsigned char name[10]; | |
73 | struct mbox_chan *chan; | |
74 | struct mbox_client client; | |
714cf5e3 | 75 | struct work_struct vq_work; |
13140de0 FD |
76 | int vq_id; |
77 | }; | |
78 | ||
79 | struct stm32_rproc { | |
80 | struct reset_control *rst; | |
81 | struct stm32_syscon hold_boot; | |
82 | struct stm32_syscon pdds; | |
9276536f MP |
83 | struct stm32_syscon m4_state; |
84 | struct stm32_syscon rsctbl; | |
410119ee | 85 | int wdg_irq; |
13140de0 FD |
86 | u32 nb_rmems; |
87 | struct stm32_rproc_mem *rmems; | |
88 | struct stm32_mbox mb[MBOX_NB_MBX]; | |
714cf5e3 | 89 | struct workqueue_struct *workqueue; |
13140de0 | 90 | bool secured_soc; |
11a7aaa7 | 91 | void __iomem *rsc_va; |
13140de0 FD |
92 | }; |
93 | ||
94 | static int stm32_rproc_pa_to_da(struct rproc *rproc, phys_addr_t pa, u64 *da) | |
95 | { | |
96 | unsigned int i; | |
97 | struct stm32_rproc *ddata = rproc->priv; | |
98 | struct stm32_rproc_mem *p_mem; | |
99 | ||
100 | for (i = 0; i < ddata->nb_rmems; i++) { | |
101 | p_mem = &ddata->rmems[i]; | |
102 | ||
103 | if (pa < p_mem->bus_addr || | |
104 | pa >= p_mem->bus_addr + p_mem->size) | |
105 | continue; | |
106 | *da = pa - p_mem->bus_addr + p_mem->dev_addr; | |
107 | dev_dbg(rproc->dev.parent, "pa %pa to da %llx\n", &pa, *da); | |
108 | return 0; | |
109 | } | |
110 | ||
111 | return -EINVAL; | |
112 | } | |
113 | ||
114 | static int stm32_rproc_mem_alloc(struct rproc *rproc, | |
115 | struct rproc_mem_entry *mem) | |
116 | { | |
117 | struct device *dev = rproc->dev.parent; | |
118 | void *va; | |
119 | ||
120 | dev_dbg(dev, "map memory: %pa+%x\n", &mem->dma, mem->len); | |
121 | va = ioremap_wc(mem->dma, mem->len); | |
122 | if (IS_ERR_OR_NULL(va)) { | |
123 | dev_err(dev, "Unable to map memory region: %pa+%x\n", | |
124 | &mem->dma, mem->len); | |
125 | return -ENOMEM; | |
126 | } | |
127 | ||
128 | /* Update memory entry va */ | |
129 | mem->va = va; | |
130 | ||
131 | return 0; | |
132 | } | |
133 | ||
134 | static int stm32_rproc_mem_release(struct rproc *rproc, | |
135 | struct rproc_mem_entry *mem) | |
136 | { | |
137 | dev_dbg(rproc->dev.parent, "unmap memory: %pa\n", &mem->dma); | |
138 | iounmap(mem->va); | |
139 | ||
140 | return 0; | |
141 | } | |
142 | ||
7b9f18ca MP |
143 | static int stm32_rproc_of_memory_translations(struct platform_device *pdev, |
144 | struct stm32_rproc *ddata) | |
13140de0 | 145 | { |
7b9f18ca | 146 | struct device *parent, *dev = &pdev->dev; |
13140de0 FD |
147 | struct device_node *np; |
148 | struct stm32_rproc_mem *p_mems; | |
149 | struct stm32_rproc_mem_ranges *mem_range; | |
150 | int cnt, array_size, i, ret = 0; | |
151 | ||
152 | parent = dev->parent; | |
153 | np = parent->of_node; | |
154 | ||
155 | cnt = of_property_count_elems_of_size(np, "dma-ranges", | |
156 | sizeof(*mem_range)); | |
157 | if (cnt <= 0) { | |
158 | dev_err(dev, "%s: dma-ranges property not defined\n", __func__); | |
159 | return -EINVAL; | |
160 | } | |
161 | ||
162 | p_mems = devm_kcalloc(dev, cnt, sizeof(*p_mems), GFP_KERNEL); | |
163 | if (!p_mems) | |
164 | return -ENOMEM; | |
165 | mem_range = kcalloc(cnt, sizeof(*mem_range), GFP_KERNEL); | |
166 | if (!mem_range) | |
167 | return -ENOMEM; | |
168 | ||
169 | array_size = cnt * sizeof(struct stm32_rproc_mem_ranges) / sizeof(u32); | |
170 | ||
171 | ret = of_property_read_u32_array(np, "dma-ranges", | |
172 | (u32 *)mem_range, array_size); | |
173 | if (ret) { | |
174 | dev_err(dev, "error while get dma-ranges property: %x\n", ret); | |
175 | goto free_mem; | |
176 | } | |
177 | ||
178 | for (i = 0; i < cnt; i++) { | |
179 | p_mems[i].bus_addr = mem_range[i].bus_addr; | |
180 | p_mems[i].dev_addr = mem_range[i].dev_addr; | |
181 | p_mems[i].size = mem_range[i].size; | |
182 | ||
183 | dev_dbg(dev, "memory range[%i]: da %#x, pa %pa, size %#zx:\n", | |
184 | i, p_mems[i].dev_addr, &p_mems[i].bus_addr, | |
185 | p_mems[i].size); | |
186 | } | |
187 | ||
188 | ddata->rmems = p_mems; | |
189 | ddata->nb_rmems = cnt; | |
190 | ||
191 | free_mem: | |
192 | kfree(mem_range); | |
193 | return ret; | |
194 | } | |
195 | ||
196 | static int stm32_rproc_mbox_idx(struct rproc *rproc, const unsigned char *name) | |
197 | { | |
198 | struct stm32_rproc *ddata = rproc->priv; | |
199 | int i; | |
200 | ||
201 | for (i = 0; i < ARRAY_SIZE(ddata->mb); i++) { | |
202 | if (!strncmp(ddata->mb[i].name, name, strlen(name))) | |
203 | return i; | |
204 | } | |
205 | dev_err(&rproc->dev, "mailbox %s not found\n", name); | |
206 | ||
207 | return -EINVAL; | |
208 | } | |
209 | ||
210 | static int stm32_rproc_elf_load_rsc_table(struct rproc *rproc, | |
211 | const struct firmware *fw) | |
212 | { | |
213 | if (rproc_elf_load_rsc_table(rproc, fw)) | |
214 | dev_warn(&rproc->dev, "no resource table found for this firmware\n"); | |
215 | ||
216 | return 0; | |
217 | } | |
218 | ||
dadbdb9c | 219 | static int stm32_rproc_parse_memory_regions(struct rproc *rproc) |
13140de0 FD |
220 | { |
221 | struct device *dev = rproc->dev.parent; | |
222 | struct device_node *np = dev->of_node; | |
223 | struct of_phandle_iterator it; | |
224 | struct rproc_mem_entry *mem; | |
225 | struct reserved_mem *rmem; | |
226 | u64 da; | |
227 | int index = 0; | |
228 | ||
229 | /* Register associated reserved memory regions */ | |
230 | of_phandle_iterator_init(&it, np, "memory-region", NULL, 0); | |
231 | while (of_phandle_iterator_next(&it) == 0) { | |
232 | rmem = of_reserved_mem_lookup(it.node); | |
233 | if (!rmem) { | |
234 | dev_err(dev, "unable to acquire memory-region\n"); | |
235 | return -EINVAL; | |
236 | } | |
237 | ||
238 | if (stm32_rproc_pa_to_da(rproc, rmem->base, &da) < 0) { | |
239 | dev_err(dev, "memory region not valid %pa\n", | |
240 | &rmem->base); | |
241 | return -EINVAL; | |
242 | } | |
243 | ||
244 | /* No need to map vdev buffer */ | |
245 | if (strcmp(it.node->name, "vdev0buffer")) { | |
246 | /* Register memory region */ | |
247 | mem = rproc_mem_entry_init(dev, NULL, | |
248 | (dma_addr_t)rmem->base, | |
249 | rmem->size, da, | |
250 | stm32_rproc_mem_alloc, | |
251 | stm32_rproc_mem_release, | |
252 | it.node->name); | |
253 | ||
254 | if (mem) | |
255 | rproc_coredump_add_segment(rproc, da, | |
256 | rmem->size); | |
257 | } else { | |
258 | /* Register reserved memory for vdev buffer alloc */ | |
259 | mem = rproc_of_resm_mem_entry_init(dev, index, | |
260 | rmem->size, | |
261 | rmem->base, | |
262 | it.node->name); | |
263 | } | |
264 | ||
265 | if (!mem) | |
266 | return -ENOMEM; | |
267 | ||
268 | rproc_add_carveout(rproc, mem); | |
269 | index++; | |
270 | } | |
271 | ||
dadbdb9c MP |
272 | return 0; |
273 | } | |
274 | ||
275 | static int stm32_rproc_parse_fw(struct rproc *rproc, const struct firmware *fw) | |
276 | { | |
277 | int ret = stm32_rproc_parse_memory_regions(rproc); | |
278 | ||
279 | if (ret) | |
280 | return ret; | |
281 | ||
13140de0 FD |
282 | return stm32_rproc_elf_load_rsc_table(rproc, fw); |
283 | } | |
284 | ||
285 | static irqreturn_t stm32_rproc_wdg(int irq, void *data) | |
286 | { | |
b8631ab1 MP |
287 | struct platform_device *pdev = data; |
288 | struct rproc *rproc = platform_get_drvdata(pdev); | |
13140de0 FD |
289 | |
290 | rproc_report_crash(rproc, RPROC_WATCHDOG); | |
291 | ||
292 | return IRQ_HANDLED; | |
293 | } | |
294 | ||
714cf5e3 AP |
295 | static void stm32_rproc_mb_vq_work(struct work_struct *work) |
296 | { | |
297 | struct stm32_mbox *mb = container_of(work, struct stm32_mbox, vq_work); | |
298 | struct rproc *rproc = dev_get_drvdata(mb->client.dev); | |
299 | ||
300 | if (rproc_vq_interrupt(rproc, mb->vq_id) == IRQ_NONE) | |
301 | dev_dbg(&rproc->dev, "no message found in vq%d\n", mb->vq_id); | |
302 | } | |
303 | ||
13140de0 FD |
304 | static void stm32_rproc_mb_callback(struct mbox_client *cl, void *data) |
305 | { | |
306 | struct rproc *rproc = dev_get_drvdata(cl->dev); | |
307 | struct stm32_mbox *mb = container_of(cl, struct stm32_mbox, client); | |
714cf5e3 | 308 | struct stm32_rproc *ddata = rproc->priv; |
13140de0 | 309 | |
714cf5e3 | 310 | queue_work(ddata->workqueue, &mb->vq_work); |
13140de0 FD |
311 | } |
312 | ||
313 | static void stm32_rproc_free_mbox(struct rproc *rproc) | |
314 | { | |
315 | struct stm32_rproc *ddata = rproc->priv; | |
316 | unsigned int i; | |
317 | ||
318 | for (i = 0; i < ARRAY_SIZE(ddata->mb); i++) { | |
319 | if (ddata->mb[i].chan) | |
320 | mbox_free_channel(ddata->mb[i].chan); | |
321 | ddata->mb[i].chan = NULL; | |
322 | } | |
323 | } | |
324 | ||
325 | static const struct stm32_mbox stm32_rproc_mbox[MBOX_NB_MBX] = { | |
326 | { | |
327 | .name = STM32_MBX_VQ0, | |
714cf5e3 | 328 | .vq_id = STM32_MBX_VQ0_ID, |
13140de0 FD |
329 | .client = { |
330 | .rx_callback = stm32_rproc_mb_callback, | |
331 | .tx_block = false, | |
332 | }, | |
333 | }, | |
334 | { | |
335 | .name = STM32_MBX_VQ1, | |
714cf5e3 | 336 | .vq_id = STM32_MBX_VQ1_ID, |
13140de0 FD |
337 | .client = { |
338 | .rx_callback = stm32_rproc_mb_callback, | |
339 | .tx_block = false, | |
340 | }, | |
341 | }, | |
342 | { | |
343 | .name = STM32_MBX_SHUTDOWN, | |
344 | .vq_id = -1, | |
345 | .client = { | |
346 | .tx_block = true, | |
347 | .tx_done = NULL, | |
348 | .tx_tout = 500, /* 500 ms time out */ | |
349 | }, | |
350 | } | |
351 | }; | |
352 | ||
4a56e423 | 353 | static int stm32_rproc_request_mbox(struct rproc *rproc) |
13140de0 FD |
354 | { |
355 | struct stm32_rproc *ddata = rproc->priv; | |
356 | struct device *dev = &rproc->dev; | |
357 | unsigned int i; | |
4a56e423 | 358 | int j; |
13140de0 FD |
359 | const unsigned char *name; |
360 | struct mbox_client *cl; | |
361 | ||
362 | /* Initialise mailbox structure table */ | |
363 | memcpy(ddata->mb, stm32_rproc_mbox, sizeof(stm32_rproc_mbox)); | |
364 | ||
365 | for (i = 0; i < MBOX_NB_MBX; i++) { | |
366 | name = ddata->mb[i].name; | |
367 | ||
368 | cl = &ddata->mb[i].client; | |
369 | cl->dev = dev->parent; | |
370 | ||
371 | ddata->mb[i].chan = mbox_request_channel_byname(cl, name); | |
372 | if (IS_ERR(ddata->mb[i].chan)) { | |
4a56e423 FD |
373 | if (PTR_ERR(ddata->mb[i].chan) == -EPROBE_DEFER) |
374 | goto err_probe; | |
13140de0 FD |
375 | dev_warn(dev, "cannot get %s mbox\n", name); |
376 | ddata->mb[i].chan = NULL; | |
377 | } | |
714cf5e3 AP |
378 | if (ddata->mb[i].vq_id >= 0) { |
379 | INIT_WORK(&ddata->mb[i].vq_work, | |
380 | stm32_rproc_mb_vq_work); | |
381 | } | |
13140de0 | 382 | } |
4a56e423 FD |
383 | |
384 | return 0; | |
385 | ||
386 | err_probe: | |
387 | for (j = i - 1; j >= 0; j--) | |
388 | if (ddata->mb[j].chan) | |
389 | mbox_free_channel(ddata->mb[j].chan); | |
390 | return -EPROBE_DEFER; | |
13140de0 FD |
391 | } |
392 | ||
393 | static int stm32_rproc_set_hold_boot(struct rproc *rproc, bool hold) | |
394 | { | |
395 | struct stm32_rproc *ddata = rproc->priv; | |
396 | struct stm32_syscon hold_boot = ddata->hold_boot; | |
397 | struct arm_smccc_res smc_res; | |
398 | int val, err; | |
399 | ||
400 | val = hold ? HOLD_BOOT : RELEASE_BOOT; | |
401 | ||
93f1d3e4 | 402 | if (IS_ENABLED(CONFIG_HAVE_ARM_SMCCC) && ddata->secured_soc) { |
13140de0 FD |
403 | arm_smccc_smc(STM32_SMC_RCC, STM32_SMC_REG_WRITE, |
404 | hold_boot.reg, val, 0, 0, 0, 0, &smc_res); | |
405 | err = smc_res.a0; | |
406 | } else { | |
407 | err = regmap_update_bits(hold_boot.map, hold_boot.reg, | |
408 | hold_boot.mask, val); | |
409 | } | |
410 | ||
411 | if (err) | |
412 | dev_err(&rproc->dev, "failed to set hold boot\n"); | |
413 | ||
414 | return err; | |
415 | } | |
416 | ||
417 | static void stm32_rproc_add_coredump_trace(struct rproc *rproc) | |
418 | { | |
419 | struct rproc_debug_trace *trace; | |
420 | struct rproc_dump_segment *segment; | |
421 | bool already_added; | |
422 | ||
423 | list_for_each_entry(trace, &rproc->traces, node) { | |
424 | already_added = false; | |
425 | ||
426 | list_for_each_entry(segment, &rproc->dump_segments, node) { | |
427 | if (segment->da == trace->trace_mem.da) { | |
428 | already_added = true; | |
429 | break; | |
430 | } | |
431 | } | |
432 | ||
433 | if (!already_added) | |
434 | rproc_coredump_add_segment(rproc, trace->trace_mem.da, | |
435 | trace->trace_mem.len); | |
436 | } | |
437 | } | |
438 | ||
439 | static int stm32_rproc_start(struct rproc *rproc) | |
440 | { | |
abbe429d | 441 | struct stm32_rproc *ddata = rproc->priv; |
13140de0 FD |
442 | int err; |
443 | ||
444 | stm32_rproc_add_coredump_trace(rproc); | |
445 | ||
abbe429d FD |
446 | /* clear remote proc Deep Sleep */ |
447 | if (ddata->pdds.map) { | |
448 | err = regmap_update_bits(ddata->pdds.map, ddata->pdds.reg, | |
449 | ddata->pdds.mask, 0); | |
450 | if (err) { | |
451 | dev_err(&rproc->dev, "failed to clear pdds\n"); | |
452 | return err; | |
453 | } | |
454 | } | |
455 | ||
13140de0 FD |
456 | err = stm32_rproc_set_hold_boot(rproc, false); |
457 | if (err) | |
458 | return err; | |
459 | ||
460 | return stm32_rproc_set_hold_boot(rproc, true); | |
461 | } | |
462 | ||
bee04d46 MP |
463 | static int stm32_rproc_attach(struct rproc *rproc) |
464 | { | |
465 | stm32_rproc_add_coredump_trace(rproc); | |
466 | ||
467 | return stm32_rproc_set_hold_boot(rproc, true); | |
468 | } | |
469 | ||
13140de0 FD |
470 | static int stm32_rproc_stop(struct rproc *rproc) |
471 | { | |
472 | struct stm32_rproc *ddata = rproc->priv; | |
473 | int err, dummy_data, idx; | |
474 | ||
475 | /* request shutdown of the remote processor */ | |
476 | if (rproc->state != RPROC_OFFLINE) { | |
477 | idx = stm32_rproc_mbox_idx(rproc, STM32_MBX_SHUTDOWN); | |
478 | if (idx >= 0 && ddata->mb[idx].chan) { | |
479 | /* a dummy data is sent to allow to block on transmit */ | |
480 | err = mbox_send_message(ddata->mb[idx].chan, | |
481 | &dummy_data); | |
482 | if (err < 0) | |
483 | dev_warn(&rproc->dev, "warning: remote FW shutdown without ack\n"); | |
484 | } | |
485 | } | |
486 | ||
487 | err = stm32_rproc_set_hold_boot(rproc, true); | |
488 | if (err) | |
489 | return err; | |
490 | ||
491 | err = reset_control_assert(ddata->rst); | |
492 | if (err) { | |
493 | dev_err(&rproc->dev, "failed to assert the reset\n"); | |
494 | return err; | |
495 | } | |
496 | ||
497 | /* to allow platform Standby power mode, set remote proc Deep Sleep */ | |
498 | if (ddata->pdds.map) { | |
499 | err = regmap_update_bits(ddata->pdds.map, ddata->pdds.reg, | |
500 | ddata->pdds.mask, 1); | |
501 | if (err) { | |
502 | dev_err(&rproc->dev, "failed to set pdds\n"); | |
503 | return err; | |
504 | } | |
505 | } | |
506 | ||
efd86262 MP |
507 | /* update coprocessor state to OFF if available */ |
508 | if (ddata->m4_state.map) { | |
509 | err = regmap_update_bits(ddata->m4_state.map, | |
510 | ddata->m4_state.reg, | |
511 | ddata->m4_state.mask, | |
512 | M4_STATE_OFF); | |
513 | if (err) { | |
514 | dev_err(&rproc->dev, "failed to set copro state\n"); | |
515 | return err; | |
516 | } | |
517 | } | |
518 | ||
13140de0 FD |
519 | return 0; |
520 | } | |
521 | ||
522 | static void stm32_rproc_kick(struct rproc *rproc, int vqid) | |
523 | { | |
524 | struct stm32_rproc *ddata = rproc->priv; | |
525 | unsigned int i; | |
526 | int err; | |
527 | ||
528 | if (WARN_ON(vqid >= MBOX_NB_VQ)) | |
529 | return; | |
530 | ||
531 | for (i = 0; i < MBOX_NB_MBX; i++) { | |
532 | if (vqid != ddata->mb[i].vq_id) | |
533 | continue; | |
534 | if (!ddata->mb[i].chan) | |
535 | return; | |
536 | err = mbox_send_message(ddata->mb[i].chan, (void *)(long)vqid); | |
537 | if (err < 0) | |
538 | dev_err(&rproc->dev, "%s: failed (%s, err:%d)\n", | |
539 | __func__, ddata->mb[i].name, err); | |
540 | return; | |
541 | } | |
542 | } | |
543 | ||
0eee3d28 | 544 | static const struct rproc_ops st_rproc_ops = { |
13140de0 FD |
545 | .start = stm32_rproc_start, |
546 | .stop = stm32_rproc_stop, | |
bee04d46 | 547 | .attach = stm32_rproc_attach, |
13140de0 FD |
548 | .kick = stm32_rproc_kick, |
549 | .load = rproc_elf_load_segments, | |
550 | .parse_fw = stm32_rproc_parse_fw, | |
551 | .find_loaded_rsc_table = rproc_elf_find_loaded_rsc_table, | |
e29ff72b | 552 | .sanity_check = rproc_elf_sanity_check, |
13140de0 FD |
553 | .get_boot_addr = rproc_elf_get_boot_addr, |
554 | }; | |
555 | ||
556 | static const struct of_device_id stm32_rproc_match[] = { | |
557 | { .compatible = "st,stm32mp1-m4" }, | |
558 | {}, | |
559 | }; | |
560 | MODULE_DEVICE_TABLE(of, stm32_rproc_match); | |
561 | ||
562 | static int stm32_rproc_get_syscon(struct device_node *np, const char *prop, | |
563 | struct stm32_syscon *syscon) | |
564 | { | |
565 | int err = 0; | |
566 | ||
567 | syscon->map = syscon_regmap_lookup_by_phandle(np, prop); | |
568 | if (IS_ERR(syscon->map)) { | |
569 | err = PTR_ERR(syscon->map); | |
570 | syscon->map = NULL; | |
571 | goto out; | |
572 | } | |
573 | ||
574 | err = of_property_read_u32_index(np, prop, 1, &syscon->reg); | |
575 | if (err) | |
576 | goto out; | |
577 | ||
578 | err = of_property_read_u32_index(np, prop, 2, &syscon->mask); | |
579 | ||
580 | out: | |
581 | return err; | |
582 | } | |
583 | ||
8210fc87 MP |
584 | static int stm32_rproc_parse_dt(struct platform_device *pdev, |
585 | struct stm32_rproc *ddata, bool *auto_boot) | |
13140de0 FD |
586 | { |
587 | struct device *dev = &pdev->dev; | |
588 | struct device_node *np = dev->of_node; | |
13140de0 FD |
589 | struct stm32_syscon tz; |
590 | unsigned int tzen; | |
591 | int err, irq; | |
592 | ||
593 | irq = platform_get_irq(pdev, 0); | |
d333de37 FD |
594 | if (irq == -EPROBE_DEFER) |
595 | return -EPROBE_DEFER; | |
596 | ||
13140de0 FD |
597 | if (irq > 0) { |
598 | err = devm_request_irq(dev, irq, stm32_rproc_wdg, 0, | |
b8631ab1 | 599 | dev_name(dev), pdev); |
13140de0 FD |
600 | if (err) { |
601 | dev_err(dev, "failed to request wdg irq\n"); | |
602 | return err; | |
603 | } | |
604 | ||
410119ee FD |
605 | ddata->wdg_irq = irq; |
606 | ||
607 | if (of_property_read_bool(np, "wakeup-source")) { | |
608 | device_init_wakeup(dev, true); | |
609 | dev_pm_set_wake_irq(dev, irq); | |
610 | } | |
611 | ||
13140de0 FD |
612 | dev_info(dev, "wdg irq registered\n"); |
613 | } | |
614 | ||
615 | ddata->rst = devm_reset_control_get_by_index(dev, 0); | |
616 | if (IS_ERR(ddata->rst)) { | |
617 | dev_err(dev, "failed to get mcu reset\n"); | |
618 | return PTR_ERR(ddata->rst); | |
619 | } | |
620 | ||
621 | /* | |
622 | * if platform is secured the hold boot bit must be written by | |
623 | * smc call and read normally. | |
624 | * if not secure the hold boot bit could be read/write normally | |
625 | */ | |
626 | err = stm32_rproc_get_syscon(np, "st,syscfg-tz", &tz); | |
627 | if (err) { | |
628 | dev_err(dev, "failed to get tz syscfg\n"); | |
629 | return err; | |
630 | } | |
631 | ||
632 | err = regmap_read(tz.map, tz.reg, &tzen); | |
633 | if (err) { | |
8210fc87 | 634 | dev_err(dev, "failed to read tzen\n"); |
13140de0 FD |
635 | return err; |
636 | } | |
637 | ddata->secured_soc = tzen & tz.mask; | |
638 | ||
639 | err = stm32_rproc_get_syscon(np, "st,syscfg-holdboot", | |
640 | &ddata->hold_boot); | |
641 | if (err) { | |
642 | dev_err(dev, "failed to get hold boot\n"); | |
643 | return err; | |
644 | } | |
645 | ||
646 | err = stm32_rproc_get_syscon(np, "st,syscfg-pdds", &ddata->pdds); | |
647 | if (err) | |
b1f0fa86 | 648 | dev_info(dev, "failed to get pdds\n"); |
13140de0 | 649 | |
8210fc87 | 650 | *auto_boot = of_property_read_bool(np, "st,auto-boot"); |
13140de0 | 651 | |
9276536f MP |
652 | /* |
653 | * See if we can check the M4 status, i.e if it was started | |
654 | * from the boot loader or not. | |
655 | */ | |
656 | err = stm32_rproc_get_syscon(np, "st,syscfg-m4-state", | |
657 | &ddata->m4_state); | |
658 | if (err) { | |
659 | /* remember this */ | |
660 | ddata->m4_state.map = NULL; | |
661 | /* no coprocessor state syscon (optional) */ | |
662 | dev_warn(dev, "m4 state not supported\n"); | |
663 | ||
664 | /* no need to go further */ | |
665 | return 0; | |
666 | } | |
667 | ||
668 | /* See if we can get the resource table */ | |
669 | err = stm32_rproc_get_syscon(np, "st,syscfg-rsc-tbl", | |
670 | &ddata->rsctbl); | |
671 | if (err) { | |
672 | /* no rsc table syscon (optional) */ | |
673 | dev_warn(dev, "rsc tbl syscon not supported\n"); | |
674 | } | |
675 | ||
95e32f86 | 676 | return 0; |
13140de0 FD |
677 | } |
678 | ||
376ffdc0 MP |
679 | static int stm32_rproc_get_m4_status(struct stm32_rproc *ddata, |
680 | unsigned int *state) | |
681 | { | |
682 | /* See stm32_rproc_parse_dt() */ | |
683 | if (!ddata->m4_state.map) { | |
684 | /* | |
685 | * We couldn't get the coprocessor's state, assume | |
686 | * it is not running. | |
687 | */ | |
cb2d8d5b | 688 | *state = M4_STATE_OFF; |
376ffdc0 MP |
689 | return 0; |
690 | } | |
691 | ||
692 | return regmap_read(ddata->m4_state.map, ddata->m4_state.reg, state); | |
693 | } | |
694 | ||
11a7aaa7 MP |
695 | static int stm32_rproc_da_to_pa(struct platform_device *pdev, |
696 | struct stm32_rproc *ddata, | |
697 | u64 da, phys_addr_t *pa) | |
698 | { | |
699 | struct device *dev = &pdev->dev; | |
700 | struct stm32_rproc_mem *p_mem; | |
701 | unsigned int i; | |
702 | ||
703 | for (i = 0; i < ddata->nb_rmems; i++) { | |
704 | p_mem = &ddata->rmems[i]; | |
705 | ||
706 | if (da < p_mem->dev_addr || | |
707 | da >= p_mem->dev_addr + p_mem->size) | |
708 | continue; | |
709 | ||
710 | *pa = da - p_mem->dev_addr + p_mem->bus_addr; | |
711 | dev_dbg(dev, "da %llx to pa %#x\n", da, *pa); | |
712 | ||
713 | return 0; | |
714 | } | |
715 | ||
716 | dev_err(dev, "can't translate da %llx\n", da); | |
717 | ||
718 | return -EINVAL; | |
719 | } | |
720 | ||
721 | static int stm32_rproc_get_loaded_rsc_table(struct platform_device *pdev, | |
722 | struct rproc *rproc, | |
723 | struct stm32_rproc *ddata) | |
724 | { | |
725 | struct device *dev = &pdev->dev; | |
726 | phys_addr_t rsc_pa; | |
727 | u32 rsc_da; | |
728 | int err; | |
729 | ||
730 | err = regmap_read(ddata->rsctbl.map, ddata->rsctbl.reg, &rsc_da); | |
731 | if (err) { | |
732 | dev_err(dev, "failed to read rsc tbl addr\n"); | |
733 | return err; | |
734 | } | |
735 | ||
736 | if (!rsc_da) | |
737 | /* no rsc table */ | |
738 | return 0; | |
739 | ||
740 | err = stm32_rproc_da_to_pa(pdev, ddata, rsc_da, &rsc_pa); | |
741 | if (err) | |
742 | return err; | |
743 | ||
744 | ddata->rsc_va = devm_ioremap_wc(dev, rsc_pa, RSC_TBL_SIZE); | |
745 | if (IS_ERR_OR_NULL(ddata->rsc_va)) { | |
746 | dev_err(dev, "Unable to map memory region: %pa+%zx\n", | |
747 | &rsc_pa, RSC_TBL_SIZE); | |
748 | ddata->rsc_va = NULL; | |
749 | return -ENOMEM; | |
750 | } | |
751 | ||
752 | /* | |
753 | * The resource table is already loaded in device memory, no need | |
754 | * to work with a cached table. | |
755 | */ | |
756 | rproc->cached_table = NULL; | |
757 | /* Assuming the resource table fits in 1kB is fair */ | |
758 | rproc->table_sz = RSC_TBL_SIZE; | |
759 | rproc->table_ptr = (struct resource_table *)ddata->rsc_va; | |
760 | ||
761 | return 0; | |
762 | } | |
763 | ||
13140de0 FD |
764 | static int stm32_rproc_probe(struct platform_device *pdev) |
765 | { | |
766 | struct device *dev = &pdev->dev; | |
767 | struct stm32_rproc *ddata; | |
768 | struct device_node *np = dev->of_node; | |
769 | struct rproc *rproc; | |
376ffdc0 | 770 | unsigned int state; |
13140de0 FD |
771 | int ret; |
772 | ||
773 | ret = dma_coerce_mask_and_coherent(dev, DMA_BIT_MASK(32)); | |
774 | if (ret) | |
775 | return ret; | |
776 | ||
777 | rproc = rproc_alloc(dev, np->name, &st_rproc_ops, NULL, sizeof(*ddata)); | |
778 | if (!rproc) | |
779 | return -ENOMEM; | |
780 | ||
8210fc87 MP |
781 | ddata = rproc->priv; |
782 | ||
3898fc99 | 783 | rproc_coredump_set_elf_info(rproc, ELFCLASS32, EM_NONE); |
8210fc87 MP |
784 | |
785 | ret = stm32_rproc_parse_dt(pdev, ddata, &rproc->auto_boot); | |
786 | if (ret) | |
787 | goto free_rproc; | |
788 | ||
95e32f86 MP |
789 | ret = stm32_rproc_of_memory_translations(pdev, ddata); |
790 | if (ret) | |
791 | goto free_rproc; | |
792 | ||
376ffdc0 MP |
793 | ret = stm32_rproc_get_m4_status(ddata, &state); |
794 | if (ret) | |
795 | goto free_rproc; | |
796 | ||
dadbdb9c | 797 | if (state == M4_STATE_CRUN) { |
376ffdc0 MP |
798 | rproc->state = RPROC_DETACHED; |
799 | ||
dadbdb9c MP |
800 | ret = stm32_rproc_parse_memory_regions(rproc); |
801 | if (ret) | |
802 | goto free_resources; | |
11a7aaa7 MP |
803 | |
804 | ret = stm32_rproc_get_loaded_rsc_table(pdev, rproc, ddata); | |
805 | if (ret) | |
806 | goto free_resources; | |
dadbdb9c MP |
807 | } |
808 | ||
13140de0 | 809 | rproc->has_iommu = false; |
714cf5e3 AP |
810 | ddata->workqueue = create_workqueue(dev_name(dev)); |
811 | if (!ddata->workqueue) { | |
812 | dev_err(dev, "cannot create workqueue\n"); | |
813 | ret = -ENOMEM; | |
dadbdb9c | 814 | goto free_resources; |
714cf5e3 | 815 | } |
13140de0 FD |
816 | |
817 | platform_set_drvdata(pdev, rproc); | |
818 | ||
4a56e423 FD |
819 | ret = stm32_rproc_request_mbox(rproc); |
820 | if (ret) | |
8210fc87 | 821 | goto free_wkq; |
13140de0 FD |
822 | |
823 | ret = rproc_add(rproc); | |
824 | if (ret) | |
825 | goto free_mb; | |
826 | ||
827 | return 0; | |
828 | ||
829 | free_mb: | |
830 | stm32_rproc_free_mbox(rproc); | |
714cf5e3 AP |
831 | free_wkq: |
832 | destroy_workqueue(ddata->workqueue); | |
dadbdb9c MP |
833 | free_resources: |
834 | rproc_resource_cleanup(rproc); | |
13140de0 | 835 | free_rproc: |
410119ee FD |
836 | if (device_may_wakeup(dev)) { |
837 | dev_pm_clear_wake_irq(dev); | |
838 | device_init_wakeup(dev, false); | |
839 | } | |
13140de0 FD |
840 | rproc_free(rproc); |
841 | return ret; | |
842 | } | |
843 | ||
844 | static int stm32_rproc_remove(struct platform_device *pdev) | |
845 | { | |
846 | struct rproc *rproc = platform_get_drvdata(pdev); | |
714cf5e3 | 847 | struct stm32_rproc *ddata = rproc->priv; |
410119ee | 848 | struct device *dev = &pdev->dev; |
13140de0 FD |
849 | |
850 | if (atomic_read(&rproc->power) > 0) | |
851 | rproc_shutdown(rproc); | |
852 | ||
853 | rproc_del(rproc); | |
854 | stm32_rproc_free_mbox(rproc); | |
714cf5e3 | 855 | destroy_workqueue(ddata->workqueue); |
410119ee FD |
856 | |
857 | if (device_may_wakeup(dev)) { | |
858 | dev_pm_clear_wake_irq(dev); | |
859 | device_init_wakeup(dev, false); | |
860 | } | |
13140de0 FD |
861 | rproc_free(rproc); |
862 | ||
863 | return 0; | |
864 | } | |
865 | ||
410119ee FD |
866 | static int __maybe_unused stm32_rproc_suspend(struct device *dev) |
867 | { | |
868 | struct rproc *rproc = dev_get_drvdata(dev); | |
869 | struct stm32_rproc *ddata = rproc->priv; | |
870 | ||
871 | if (device_may_wakeup(dev)) | |
872 | return enable_irq_wake(ddata->wdg_irq); | |
873 | ||
874 | return 0; | |
875 | } | |
876 | ||
877 | static int __maybe_unused stm32_rproc_resume(struct device *dev) | |
878 | { | |
879 | struct rproc *rproc = dev_get_drvdata(dev); | |
880 | struct stm32_rproc *ddata = rproc->priv; | |
881 | ||
882 | if (device_may_wakeup(dev)) | |
883 | return disable_irq_wake(ddata->wdg_irq); | |
884 | ||
885 | return 0; | |
886 | } | |
887 | ||
888 | static SIMPLE_DEV_PM_OPS(stm32_rproc_pm_ops, | |
889 | stm32_rproc_suspend, stm32_rproc_resume); | |
890 | ||
13140de0 FD |
891 | static struct platform_driver stm32_rproc_driver = { |
892 | .probe = stm32_rproc_probe, | |
893 | .remove = stm32_rproc_remove, | |
894 | .driver = { | |
895 | .name = "stm32-rproc", | |
410119ee | 896 | .pm = &stm32_rproc_pm_ops, |
13140de0 FD |
897 | .of_match_table = of_match_ptr(stm32_rproc_match), |
898 | }, | |
899 | }; | |
900 | module_platform_driver(stm32_rproc_driver); | |
901 | ||
902 | MODULE_DESCRIPTION("STM32 Remote Processor Control Driver"); | |
903 | MODULE_AUTHOR("Ludovic Barre <ludovic.barre@st.com>"); | |
904 | MODULE_AUTHOR("Fabien Dessenne <fabien.dessenne@st.com>"); | |
905 | MODULE_LICENSE("GPL v2"); | |
906 |