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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 | |
edf696f2 | 31 | #define MBOX_NB_MBX 4 |
13140de0 FD |
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 | 40 | #define STM32_MBX_SHUTDOWN "shutdown" |
edf696f2 | 41 | #define STM32_MBX_DETACH "detach" |
13140de0 | 42 | |
11a7aaa7 MP |
43 | #define RSC_TBL_SIZE 1024 |
44 | ||
376ffdc0 MP |
45 | #define M4_STATE_OFF 0 |
46 | #define M4_STATE_INI 1 | |
47 | #define M4_STATE_CRUN 2 | |
48 | #define M4_STATE_CSTOP 3 | |
49 | #define M4_STATE_STANDBY 4 | |
50 | #define M4_STATE_CRASH 5 | |
51 | ||
13140de0 FD |
52 | struct stm32_syscon { |
53 | struct regmap *map; | |
54 | u32 reg; | |
55 | u32 mask; | |
56 | }; | |
57 | ||
58 | struct stm32_rproc_mem { | |
59 | char name[20]; | |
60 | void __iomem *cpu_addr; | |
61 | phys_addr_t bus_addr; | |
62 | u32 dev_addr; | |
63 | size_t size; | |
64 | }; | |
65 | ||
66 | struct stm32_rproc_mem_ranges { | |
67 | u32 dev_addr; | |
68 | u32 bus_addr; | |
69 | u32 size; | |
70 | }; | |
71 | ||
72 | struct stm32_mbox { | |
73 | const unsigned char name[10]; | |
74 | struct mbox_chan *chan; | |
75 | struct mbox_client client; | |
714cf5e3 | 76 | struct work_struct vq_work; |
13140de0 FD |
77 | int vq_id; |
78 | }; | |
79 | ||
80 | struct stm32_rproc { | |
81 | struct reset_control *rst; | |
82 | struct stm32_syscon hold_boot; | |
83 | struct stm32_syscon pdds; | |
9276536f MP |
84 | struct stm32_syscon m4_state; |
85 | struct stm32_syscon rsctbl; | |
410119ee | 86 | int wdg_irq; |
13140de0 FD |
87 | u32 nb_rmems; |
88 | struct stm32_rproc_mem *rmems; | |
89 | struct stm32_mbox mb[MBOX_NB_MBX]; | |
714cf5e3 | 90 | struct workqueue_struct *workqueue; |
13140de0 | 91 | bool secured_soc; |
11a7aaa7 | 92 | void __iomem *rsc_va; |
13140de0 FD |
93 | }; |
94 | ||
95 | static int stm32_rproc_pa_to_da(struct rproc *rproc, phys_addr_t pa, u64 *da) | |
96 | { | |
97 | unsigned int i; | |
98 | struct stm32_rproc *ddata = rproc->priv; | |
99 | struct stm32_rproc_mem *p_mem; | |
100 | ||
101 | for (i = 0; i < ddata->nb_rmems; i++) { | |
102 | p_mem = &ddata->rmems[i]; | |
103 | ||
104 | if (pa < p_mem->bus_addr || | |
105 | pa >= p_mem->bus_addr + p_mem->size) | |
106 | continue; | |
107 | *da = pa - p_mem->bus_addr + p_mem->dev_addr; | |
108 | dev_dbg(rproc->dev.parent, "pa %pa to da %llx\n", &pa, *da); | |
109 | return 0; | |
110 | } | |
111 | ||
112 | return -EINVAL; | |
113 | } | |
114 | ||
115 | static int stm32_rproc_mem_alloc(struct rproc *rproc, | |
116 | struct rproc_mem_entry *mem) | |
117 | { | |
118 | struct device *dev = rproc->dev.parent; | |
119 | void *va; | |
120 | ||
121 | dev_dbg(dev, "map memory: %pa+%x\n", &mem->dma, mem->len); | |
122 | va = ioremap_wc(mem->dma, mem->len); | |
123 | if (IS_ERR_OR_NULL(va)) { | |
124 | dev_err(dev, "Unable to map memory region: %pa+%x\n", | |
125 | &mem->dma, mem->len); | |
126 | return -ENOMEM; | |
127 | } | |
128 | ||
129 | /* Update memory entry va */ | |
130 | mem->va = va; | |
131 | ||
132 | return 0; | |
133 | } | |
134 | ||
135 | static int stm32_rproc_mem_release(struct rproc *rproc, | |
136 | struct rproc_mem_entry *mem) | |
137 | { | |
138 | dev_dbg(rproc->dev.parent, "unmap memory: %pa\n", &mem->dma); | |
139 | iounmap(mem->va); | |
140 | ||
141 | return 0; | |
142 | } | |
143 | ||
7b9f18ca MP |
144 | static int stm32_rproc_of_memory_translations(struct platform_device *pdev, |
145 | struct stm32_rproc *ddata) | |
13140de0 | 146 | { |
7b9f18ca | 147 | struct device *parent, *dev = &pdev->dev; |
13140de0 FD |
148 | struct device_node *np; |
149 | struct stm32_rproc_mem *p_mems; | |
150 | struct stm32_rproc_mem_ranges *mem_range; | |
151 | int cnt, array_size, i, ret = 0; | |
152 | ||
153 | parent = dev->parent; | |
154 | np = parent->of_node; | |
155 | ||
156 | cnt = of_property_count_elems_of_size(np, "dma-ranges", | |
157 | sizeof(*mem_range)); | |
158 | if (cnt <= 0) { | |
159 | dev_err(dev, "%s: dma-ranges property not defined\n", __func__); | |
160 | return -EINVAL; | |
161 | } | |
162 | ||
163 | p_mems = devm_kcalloc(dev, cnt, sizeof(*p_mems), GFP_KERNEL); | |
164 | if (!p_mems) | |
165 | return -ENOMEM; | |
166 | mem_range = kcalloc(cnt, sizeof(*mem_range), GFP_KERNEL); | |
167 | if (!mem_range) | |
168 | return -ENOMEM; | |
169 | ||
170 | array_size = cnt * sizeof(struct stm32_rproc_mem_ranges) / sizeof(u32); | |
171 | ||
172 | ret = of_property_read_u32_array(np, "dma-ranges", | |
173 | (u32 *)mem_range, array_size); | |
174 | if (ret) { | |
175 | dev_err(dev, "error while get dma-ranges property: %x\n", ret); | |
176 | goto free_mem; | |
177 | } | |
178 | ||
179 | for (i = 0; i < cnt; i++) { | |
180 | p_mems[i].bus_addr = mem_range[i].bus_addr; | |
181 | p_mems[i].dev_addr = mem_range[i].dev_addr; | |
182 | p_mems[i].size = mem_range[i].size; | |
183 | ||
184 | dev_dbg(dev, "memory range[%i]: da %#x, pa %pa, size %#zx:\n", | |
185 | i, p_mems[i].dev_addr, &p_mems[i].bus_addr, | |
186 | p_mems[i].size); | |
187 | } | |
188 | ||
189 | ddata->rmems = p_mems; | |
190 | ddata->nb_rmems = cnt; | |
191 | ||
192 | free_mem: | |
193 | kfree(mem_range); | |
194 | return ret; | |
195 | } | |
196 | ||
197 | static int stm32_rproc_mbox_idx(struct rproc *rproc, const unsigned char *name) | |
198 | { | |
199 | struct stm32_rproc *ddata = rproc->priv; | |
200 | int i; | |
201 | ||
202 | for (i = 0; i < ARRAY_SIZE(ddata->mb); i++) { | |
203 | if (!strncmp(ddata->mb[i].name, name, strlen(name))) | |
204 | return i; | |
205 | } | |
206 | dev_err(&rproc->dev, "mailbox %s not found\n", name); | |
207 | ||
208 | return -EINVAL; | |
209 | } | |
210 | ||
6e20a051 | 211 | static int stm32_rproc_prepare(struct rproc *rproc) |
13140de0 FD |
212 | { |
213 | struct device *dev = rproc->dev.parent; | |
214 | struct device_node *np = dev->of_node; | |
215 | struct of_phandle_iterator it; | |
216 | struct rproc_mem_entry *mem; | |
217 | struct reserved_mem *rmem; | |
218 | u64 da; | |
219 | int index = 0; | |
220 | ||
221 | /* Register associated reserved memory regions */ | |
222 | of_phandle_iterator_init(&it, np, "memory-region", NULL, 0); | |
223 | while (of_phandle_iterator_next(&it) == 0) { | |
224 | rmem = of_reserved_mem_lookup(it.node); | |
225 | if (!rmem) { | |
226 | dev_err(dev, "unable to acquire memory-region\n"); | |
227 | return -EINVAL; | |
228 | } | |
229 | ||
230 | if (stm32_rproc_pa_to_da(rproc, rmem->base, &da) < 0) { | |
231 | dev_err(dev, "memory region not valid %pa\n", | |
232 | &rmem->base); | |
233 | return -EINVAL; | |
234 | } | |
235 | ||
236 | /* No need to map vdev buffer */ | |
237 | if (strcmp(it.node->name, "vdev0buffer")) { | |
238 | /* Register memory region */ | |
239 | mem = rproc_mem_entry_init(dev, NULL, | |
240 | (dma_addr_t)rmem->base, | |
241 | rmem->size, da, | |
242 | stm32_rproc_mem_alloc, | |
243 | stm32_rproc_mem_release, | |
244 | it.node->name); | |
245 | ||
246 | if (mem) | |
247 | rproc_coredump_add_segment(rproc, da, | |
248 | rmem->size); | |
249 | } else { | |
250 | /* Register reserved memory for vdev buffer alloc */ | |
251 | mem = rproc_of_resm_mem_entry_init(dev, index, | |
252 | rmem->size, | |
253 | rmem->base, | |
254 | it.node->name); | |
255 | } | |
256 | ||
257 | if (!mem) | |
258 | return -ENOMEM; | |
259 | ||
260 | rproc_add_carveout(rproc, mem); | |
261 | index++; | |
262 | } | |
263 | ||
dadbdb9c MP |
264 | return 0; |
265 | } | |
266 | ||
267 | static int stm32_rproc_parse_fw(struct rproc *rproc, const struct firmware *fw) | |
268 | { | |
6e20a051 AP |
269 | if (rproc_elf_load_rsc_table(rproc, fw)) |
270 | dev_warn(&rproc->dev, "no resource table found for this firmware\n"); | |
dadbdb9c | 271 | |
6e20a051 | 272 | return 0; |
13140de0 FD |
273 | } |
274 | ||
275 | static irqreturn_t stm32_rproc_wdg(int irq, void *data) | |
276 | { | |
b8631ab1 MP |
277 | struct platform_device *pdev = data; |
278 | struct rproc *rproc = platform_get_drvdata(pdev); | |
13140de0 FD |
279 | |
280 | rproc_report_crash(rproc, RPROC_WATCHDOG); | |
281 | ||
282 | return IRQ_HANDLED; | |
283 | } | |
284 | ||
714cf5e3 AP |
285 | static void stm32_rproc_mb_vq_work(struct work_struct *work) |
286 | { | |
287 | struct stm32_mbox *mb = container_of(work, struct stm32_mbox, vq_work); | |
288 | struct rproc *rproc = dev_get_drvdata(mb->client.dev); | |
289 | ||
290 | if (rproc_vq_interrupt(rproc, mb->vq_id) == IRQ_NONE) | |
291 | dev_dbg(&rproc->dev, "no message found in vq%d\n", mb->vq_id); | |
292 | } | |
293 | ||
13140de0 FD |
294 | static void stm32_rproc_mb_callback(struct mbox_client *cl, void *data) |
295 | { | |
296 | struct rproc *rproc = dev_get_drvdata(cl->dev); | |
297 | struct stm32_mbox *mb = container_of(cl, struct stm32_mbox, client); | |
714cf5e3 | 298 | struct stm32_rproc *ddata = rproc->priv; |
13140de0 | 299 | |
714cf5e3 | 300 | queue_work(ddata->workqueue, &mb->vq_work); |
13140de0 FD |
301 | } |
302 | ||
303 | static void stm32_rproc_free_mbox(struct rproc *rproc) | |
304 | { | |
305 | struct stm32_rproc *ddata = rproc->priv; | |
306 | unsigned int i; | |
307 | ||
308 | for (i = 0; i < ARRAY_SIZE(ddata->mb); i++) { | |
309 | if (ddata->mb[i].chan) | |
310 | mbox_free_channel(ddata->mb[i].chan); | |
311 | ddata->mb[i].chan = NULL; | |
312 | } | |
313 | } | |
314 | ||
315 | static const struct stm32_mbox stm32_rproc_mbox[MBOX_NB_MBX] = { | |
316 | { | |
317 | .name = STM32_MBX_VQ0, | |
714cf5e3 | 318 | .vq_id = STM32_MBX_VQ0_ID, |
13140de0 FD |
319 | .client = { |
320 | .rx_callback = stm32_rproc_mb_callback, | |
321 | .tx_block = false, | |
322 | }, | |
323 | }, | |
324 | { | |
325 | .name = STM32_MBX_VQ1, | |
714cf5e3 | 326 | .vq_id = STM32_MBX_VQ1_ID, |
13140de0 FD |
327 | .client = { |
328 | .rx_callback = stm32_rproc_mb_callback, | |
329 | .tx_block = false, | |
330 | }, | |
331 | }, | |
332 | { | |
333 | .name = STM32_MBX_SHUTDOWN, | |
334 | .vq_id = -1, | |
335 | .client = { | |
336 | .tx_block = true, | |
337 | .tx_done = NULL, | |
338 | .tx_tout = 500, /* 500 ms time out */ | |
339 | }, | |
edf696f2 AP |
340 | }, |
341 | { | |
342 | .name = STM32_MBX_DETACH, | |
343 | .vq_id = -1, | |
344 | .client = { | |
345 | .tx_block = true, | |
346 | .tx_done = NULL, | |
347 | .tx_tout = 200, /* 200 ms time out to detach should be fair enough */ | |
348 | }, | |
13140de0 FD |
349 | } |
350 | }; | |
351 | ||
4a56e423 | 352 | static int stm32_rproc_request_mbox(struct rproc *rproc) |
13140de0 FD |
353 | { |
354 | struct stm32_rproc *ddata = rproc->priv; | |
355 | struct device *dev = &rproc->dev; | |
356 | unsigned int i; | |
4a56e423 | 357 | int j; |
13140de0 FD |
358 | const unsigned char *name; |
359 | struct mbox_client *cl; | |
360 | ||
361 | /* Initialise mailbox structure table */ | |
362 | memcpy(ddata->mb, stm32_rproc_mbox, sizeof(stm32_rproc_mbox)); | |
363 | ||
364 | for (i = 0; i < MBOX_NB_MBX; i++) { | |
365 | name = ddata->mb[i].name; | |
366 | ||
367 | cl = &ddata->mb[i].client; | |
368 | cl->dev = dev->parent; | |
369 | ||
370 | ddata->mb[i].chan = mbox_request_channel_byname(cl, name); | |
371 | if (IS_ERR(ddata->mb[i].chan)) { | |
cf34838d AP |
372 | if (PTR_ERR(ddata->mb[i].chan) == -EPROBE_DEFER) { |
373 | dev_err_probe(dev->parent, | |
374 | PTR_ERR(ddata->mb[i].chan), | |
375 | "failed to request mailbox %s\n", | |
376 | name); | |
4a56e423 | 377 | goto err_probe; |
cf34838d | 378 | } |
13140de0 FD |
379 | dev_warn(dev, "cannot get %s mbox\n", name); |
380 | ddata->mb[i].chan = NULL; | |
381 | } | |
714cf5e3 AP |
382 | if (ddata->mb[i].vq_id >= 0) { |
383 | INIT_WORK(&ddata->mb[i].vq_work, | |
384 | stm32_rproc_mb_vq_work); | |
385 | } | |
13140de0 | 386 | } |
4a56e423 FD |
387 | |
388 | return 0; | |
389 | ||
390 | err_probe: | |
391 | for (j = i - 1; j >= 0; j--) | |
392 | if (ddata->mb[j].chan) | |
393 | mbox_free_channel(ddata->mb[j].chan); | |
394 | return -EPROBE_DEFER; | |
13140de0 FD |
395 | } |
396 | ||
397 | static int stm32_rproc_set_hold_boot(struct rproc *rproc, bool hold) | |
398 | { | |
399 | struct stm32_rproc *ddata = rproc->priv; | |
400 | struct stm32_syscon hold_boot = ddata->hold_boot; | |
401 | struct arm_smccc_res smc_res; | |
402 | int val, err; | |
403 | ||
404 | val = hold ? HOLD_BOOT : RELEASE_BOOT; | |
405 | ||
93f1d3e4 | 406 | if (IS_ENABLED(CONFIG_HAVE_ARM_SMCCC) && ddata->secured_soc) { |
13140de0 FD |
407 | arm_smccc_smc(STM32_SMC_RCC, STM32_SMC_REG_WRITE, |
408 | hold_boot.reg, val, 0, 0, 0, 0, &smc_res); | |
409 | err = smc_res.a0; | |
410 | } else { | |
411 | err = regmap_update_bits(hold_boot.map, hold_boot.reg, | |
412 | hold_boot.mask, val); | |
413 | } | |
414 | ||
415 | if (err) | |
416 | dev_err(&rproc->dev, "failed to set hold boot\n"); | |
417 | ||
418 | return err; | |
419 | } | |
420 | ||
421 | static void stm32_rproc_add_coredump_trace(struct rproc *rproc) | |
422 | { | |
423 | struct rproc_debug_trace *trace; | |
424 | struct rproc_dump_segment *segment; | |
425 | bool already_added; | |
426 | ||
427 | list_for_each_entry(trace, &rproc->traces, node) { | |
428 | already_added = false; | |
429 | ||
430 | list_for_each_entry(segment, &rproc->dump_segments, node) { | |
431 | if (segment->da == trace->trace_mem.da) { | |
432 | already_added = true; | |
433 | break; | |
434 | } | |
435 | } | |
436 | ||
437 | if (!already_added) | |
438 | rproc_coredump_add_segment(rproc, trace->trace_mem.da, | |
439 | trace->trace_mem.len); | |
440 | } | |
441 | } | |
442 | ||
443 | static int stm32_rproc_start(struct rproc *rproc) | |
444 | { | |
abbe429d | 445 | struct stm32_rproc *ddata = rproc->priv; |
13140de0 FD |
446 | int err; |
447 | ||
448 | stm32_rproc_add_coredump_trace(rproc); | |
449 | ||
abbe429d FD |
450 | /* clear remote proc Deep Sleep */ |
451 | if (ddata->pdds.map) { | |
452 | err = regmap_update_bits(ddata->pdds.map, ddata->pdds.reg, | |
453 | ddata->pdds.mask, 0); | |
454 | if (err) { | |
455 | dev_err(&rproc->dev, "failed to clear pdds\n"); | |
456 | return err; | |
457 | } | |
458 | } | |
459 | ||
13140de0 FD |
460 | err = stm32_rproc_set_hold_boot(rproc, false); |
461 | if (err) | |
462 | return err; | |
463 | ||
464 | return stm32_rproc_set_hold_boot(rproc, true); | |
465 | } | |
466 | ||
bee04d46 MP |
467 | static int stm32_rproc_attach(struct rproc *rproc) |
468 | { | |
469 | stm32_rproc_add_coredump_trace(rproc); | |
470 | ||
471 | return stm32_rproc_set_hold_boot(rproc, true); | |
472 | } | |
473 | ||
edf696f2 AP |
474 | static int stm32_rproc_detach(struct rproc *rproc) |
475 | { | |
476 | struct stm32_rproc *ddata = rproc->priv; | |
477 | int err, dummy_data, idx; | |
478 | ||
479 | /* Inform the remote processor of the detach */ | |
480 | idx = stm32_rproc_mbox_idx(rproc, STM32_MBX_DETACH); | |
481 | if (idx >= 0 && ddata->mb[idx].chan) { | |
482 | /* A dummy data is sent to allow to block on transmit */ | |
483 | err = mbox_send_message(ddata->mb[idx].chan, | |
484 | &dummy_data); | |
485 | if (err < 0) | |
486 | dev_warn(&rproc->dev, "warning: remote FW detach without ack\n"); | |
487 | } | |
488 | ||
489 | /* Allow remote processor to auto-reboot */ | |
490 | return stm32_rproc_set_hold_boot(rproc, false); | |
491 | } | |
492 | ||
13140de0 FD |
493 | static int stm32_rproc_stop(struct rproc *rproc) |
494 | { | |
495 | struct stm32_rproc *ddata = rproc->priv; | |
496 | int err, dummy_data, idx; | |
497 | ||
498 | /* request shutdown of the remote processor */ | |
499 | if (rproc->state != RPROC_OFFLINE) { | |
500 | idx = stm32_rproc_mbox_idx(rproc, STM32_MBX_SHUTDOWN); | |
501 | if (idx >= 0 && ddata->mb[idx].chan) { | |
502 | /* a dummy data is sent to allow to block on transmit */ | |
503 | err = mbox_send_message(ddata->mb[idx].chan, | |
504 | &dummy_data); | |
505 | if (err < 0) | |
506 | dev_warn(&rproc->dev, "warning: remote FW shutdown without ack\n"); | |
507 | } | |
508 | } | |
509 | ||
510 | err = stm32_rproc_set_hold_boot(rproc, true); | |
511 | if (err) | |
512 | return err; | |
513 | ||
514 | err = reset_control_assert(ddata->rst); | |
515 | if (err) { | |
516 | dev_err(&rproc->dev, "failed to assert the reset\n"); | |
517 | return err; | |
518 | } | |
519 | ||
520 | /* to allow platform Standby power mode, set remote proc Deep Sleep */ | |
521 | if (ddata->pdds.map) { | |
522 | err = regmap_update_bits(ddata->pdds.map, ddata->pdds.reg, | |
523 | ddata->pdds.mask, 1); | |
524 | if (err) { | |
525 | dev_err(&rproc->dev, "failed to set pdds\n"); | |
526 | return err; | |
527 | } | |
528 | } | |
529 | ||
efd86262 MP |
530 | /* update coprocessor state to OFF if available */ |
531 | if (ddata->m4_state.map) { | |
532 | err = regmap_update_bits(ddata->m4_state.map, | |
533 | ddata->m4_state.reg, | |
534 | ddata->m4_state.mask, | |
535 | M4_STATE_OFF); | |
536 | if (err) { | |
537 | dev_err(&rproc->dev, "failed to set copro state\n"); | |
538 | return err; | |
539 | } | |
540 | } | |
541 | ||
13140de0 FD |
542 | return 0; |
543 | } | |
544 | ||
545 | static void stm32_rproc_kick(struct rproc *rproc, int vqid) | |
546 | { | |
547 | struct stm32_rproc *ddata = rproc->priv; | |
548 | unsigned int i; | |
549 | int err; | |
550 | ||
551 | if (WARN_ON(vqid >= MBOX_NB_VQ)) | |
552 | return; | |
553 | ||
554 | for (i = 0; i < MBOX_NB_MBX; i++) { | |
555 | if (vqid != ddata->mb[i].vq_id) | |
556 | continue; | |
557 | if (!ddata->mb[i].chan) | |
558 | return; | |
559 | err = mbox_send_message(ddata->mb[i].chan, (void *)(long)vqid); | |
560 | if (err < 0) | |
561 | dev_err(&rproc->dev, "%s: failed (%s, err:%d)\n", | |
562 | __func__, ddata->mb[i].name, err); | |
563 | return; | |
564 | } | |
565 | } | |
566 | ||
8a471396 MP |
567 | static int stm32_rproc_da_to_pa(struct rproc *rproc, |
568 | u64 da, phys_addr_t *pa) | |
569 | { | |
570 | struct stm32_rproc *ddata = rproc->priv; | |
571 | struct device *dev = rproc->dev.parent; | |
572 | struct stm32_rproc_mem *p_mem; | |
573 | unsigned int i; | |
574 | ||
575 | for (i = 0; i < ddata->nb_rmems; i++) { | |
576 | p_mem = &ddata->rmems[i]; | |
577 | ||
578 | if (da < p_mem->dev_addr || | |
579 | da >= p_mem->dev_addr + p_mem->size) | |
580 | continue; | |
581 | ||
582 | *pa = da - p_mem->dev_addr + p_mem->bus_addr; | |
583 | dev_dbg(dev, "da %llx to pa %#x\n", da, *pa); | |
584 | ||
585 | return 0; | |
586 | } | |
587 | ||
588 | dev_err(dev, "can't translate da %llx\n", da); | |
589 | ||
590 | return -EINVAL; | |
591 | } | |
592 | ||
593 | static struct resource_table * | |
594 | stm32_rproc_get_loaded_rsc_table(struct rproc *rproc, size_t *table_sz) | |
595 | { | |
596 | struct stm32_rproc *ddata = rproc->priv; | |
597 | struct device *dev = rproc->dev.parent; | |
598 | phys_addr_t rsc_pa; | |
599 | u32 rsc_da; | |
600 | int err; | |
601 | ||
602 | /* The resource table has already been mapped, nothing to do */ | |
603 | if (ddata->rsc_va) | |
604 | goto done; | |
605 | ||
606 | err = regmap_read(ddata->rsctbl.map, ddata->rsctbl.reg, &rsc_da); | |
607 | if (err) { | |
608 | dev_err(dev, "failed to read rsc tbl addr\n"); | |
609 | return ERR_PTR(-EINVAL); | |
610 | } | |
611 | ||
612 | if (!rsc_da) | |
613 | /* no rsc table */ | |
614 | return ERR_PTR(-ENOENT); | |
615 | ||
616 | err = stm32_rproc_da_to_pa(rproc, rsc_da, &rsc_pa); | |
617 | if (err) | |
618 | return ERR_PTR(err); | |
619 | ||
620 | ddata->rsc_va = devm_ioremap_wc(dev, rsc_pa, RSC_TBL_SIZE); | |
621 | if (IS_ERR_OR_NULL(ddata->rsc_va)) { | |
622 | dev_err(dev, "Unable to map memory region: %pa+%zx\n", | |
623 | &rsc_pa, RSC_TBL_SIZE); | |
624 | ddata->rsc_va = NULL; | |
625 | return ERR_PTR(-ENOMEM); | |
626 | } | |
627 | ||
628 | done: | |
edf696f2 AP |
629 | /* |
630 | * Assuming the resource table fits in 1kB is fair. | |
631 | * Notice for the detach, that this 1 kB memory area has to be reserved in the coprocessor | |
632 | * firmware for the resource table. On detach, the remoteproc core re-initializes this | |
633 | * entire area by overwriting it with the initial values stored in rproc->clean_table. | |
634 | */ | |
8a471396 MP |
635 | *table_sz = RSC_TBL_SIZE; |
636 | return (struct resource_table *)ddata->rsc_va; | |
637 | } | |
638 | ||
0eee3d28 | 639 | static const struct rproc_ops st_rproc_ops = { |
6e20a051 | 640 | .prepare = stm32_rproc_prepare, |
13140de0 FD |
641 | .start = stm32_rproc_start, |
642 | .stop = stm32_rproc_stop, | |
bee04d46 | 643 | .attach = stm32_rproc_attach, |
edf696f2 | 644 | .detach = stm32_rproc_detach, |
13140de0 FD |
645 | .kick = stm32_rproc_kick, |
646 | .load = rproc_elf_load_segments, | |
647 | .parse_fw = stm32_rproc_parse_fw, | |
648 | .find_loaded_rsc_table = rproc_elf_find_loaded_rsc_table, | |
8a471396 | 649 | .get_loaded_rsc_table = stm32_rproc_get_loaded_rsc_table, |
e29ff72b | 650 | .sanity_check = rproc_elf_sanity_check, |
13140de0 FD |
651 | .get_boot_addr = rproc_elf_get_boot_addr, |
652 | }; | |
653 | ||
654 | static const struct of_device_id stm32_rproc_match[] = { | |
655 | { .compatible = "st,stm32mp1-m4" }, | |
656 | {}, | |
657 | }; | |
658 | MODULE_DEVICE_TABLE(of, stm32_rproc_match); | |
659 | ||
660 | static int stm32_rproc_get_syscon(struct device_node *np, const char *prop, | |
661 | struct stm32_syscon *syscon) | |
662 | { | |
663 | int err = 0; | |
664 | ||
665 | syscon->map = syscon_regmap_lookup_by_phandle(np, prop); | |
666 | if (IS_ERR(syscon->map)) { | |
667 | err = PTR_ERR(syscon->map); | |
668 | syscon->map = NULL; | |
669 | goto out; | |
670 | } | |
671 | ||
672 | err = of_property_read_u32_index(np, prop, 1, &syscon->reg); | |
673 | if (err) | |
674 | goto out; | |
675 | ||
676 | err = of_property_read_u32_index(np, prop, 2, &syscon->mask); | |
677 | ||
678 | out: | |
679 | return err; | |
680 | } | |
681 | ||
8210fc87 MP |
682 | static int stm32_rproc_parse_dt(struct platform_device *pdev, |
683 | struct stm32_rproc *ddata, bool *auto_boot) | |
13140de0 FD |
684 | { |
685 | struct device *dev = &pdev->dev; | |
686 | struct device_node *np = dev->of_node; | |
13140de0 FD |
687 | struct stm32_syscon tz; |
688 | unsigned int tzen; | |
689 | int err, irq; | |
690 | ||
691 | irq = platform_get_irq(pdev, 0); | |
d333de37 | 692 | if (irq == -EPROBE_DEFER) |
cf34838d | 693 | return dev_err_probe(dev, irq, "failed to get interrupt\n"); |
d333de37 | 694 | |
13140de0 FD |
695 | if (irq > 0) { |
696 | err = devm_request_irq(dev, irq, stm32_rproc_wdg, 0, | |
b8631ab1 | 697 | dev_name(dev), pdev); |
cf34838d AP |
698 | if (err) |
699 | return dev_err_probe(dev, err, | |
700 | "failed to request wdg irq\n"); | |
13140de0 | 701 | |
410119ee FD |
702 | ddata->wdg_irq = irq; |
703 | ||
704 | if (of_property_read_bool(np, "wakeup-source")) { | |
705 | device_init_wakeup(dev, true); | |
706 | dev_pm_set_wake_irq(dev, irq); | |
707 | } | |
708 | ||
13140de0 FD |
709 | dev_info(dev, "wdg irq registered\n"); |
710 | } | |
711 | ||
712 | ddata->rst = devm_reset_control_get_by_index(dev, 0); | |
cf34838d AP |
713 | if (IS_ERR(ddata->rst)) |
714 | return dev_err_probe(dev, PTR_ERR(ddata->rst), | |
715 | "failed to get mcu_reset\n"); | |
13140de0 FD |
716 | |
717 | /* | |
718 | * if platform is secured the hold boot bit must be written by | |
719 | * smc call and read normally. | |
720 | * if not secure the hold boot bit could be read/write normally | |
721 | */ | |
722 | err = stm32_rproc_get_syscon(np, "st,syscfg-tz", &tz); | |
723 | if (err) { | |
724 | dev_err(dev, "failed to get tz syscfg\n"); | |
725 | return err; | |
726 | } | |
727 | ||
728 | err = regmap_read(tz.map, tz.reg, &tzen); | |
729 | if (err) { | |
8210fc87 | 730 | dev_err(dev, "failed to read tzen\n"); |
13140de0 FD |
731 | return err; |
732 | } | |
733 | ddata->secured_soc = tzen & tz.mask; | |
734 | ||
735 | err = stm32_rproc_get_syscon(np, "st,syscfg-holdboot", | |
736 | &ddata->hold_boot); | |
737 | if (err) { | |
738 | dev_err(dev, "failed to get hold boot\n"); | |
739 | return err; | |
740 | } | |
741 | ||
742 | err = stm32_rproc_get_syscon(np, "st,syscfg-pdds", &ddata->pdds); | |
743 | if (err) | |
b1f0fa86 | 744 | dev_info(dev, "failed to get pdds\n"); |
13140de0 | 745 | |
8210fc87 | 746 | *auto_boot = of_property_read_bool(np, "st,auto-boot"); |
13140de0 | 747 | |
9276536f MP |
748 | /* |
749 | * See if we can check the M4 status, i.e if it was started | |
750 | * from the boot loader or not. | |
751 | */ | |
752 | err = stm32_rproc_get_syscon(np, "st,syscfg-m4-state", | |
753 | &ddata->m4_state); | |
754 | if (err) { | |
755 | /* remember this */ | |
756 | ddata->m4_state.map = NULL; | |
757 | /* no coprocessor state syscon (optional) */ | |
758 | dev_warn(dev, "m4 state not supported\n"); | |
759 | ||
760 | /* no need to go further */ | |
761 | return 0; | |
762 | } | |
763 | ||
764 | /* See if we can get the resource table */ | |
765 | err = stm32_rproc_get_syscon(np, "st,syscfg-rsc-tbl", | |
766 | &ddata->rsctbl); | |
767 | if (err) { | |
768 | /* no rsc table syscon (optional) */ | |
769 | dev_warn(dev, "rsc tbl syscon not supported\n"); | |
770 | } | |
771 | ||
95e32f86 | 772 | return 0; |
13140de0 FD |
773 | } |
774 | ||
376ffdc0 MP |
775 | static int stm32_rproc_get_m4_status(struct stm32_rproc *ddata, |
776 | unsigned int *state) | |
777 | { | |
778 | /* See stm32_rproc_parse_dt() */ | |
779 | if (!ddata->m4_state.map) { | |
780 | /* | |
781 | * We couldn't get the coprocessor's state, assume | |
782 | * it is not running. | |
783 | */ | |
cb2d8d5b | 784 | *state = M4_STATE_OFF; |
376ffdc0 MP |
785 | return 0; |
786 | } | |
787 | ||
788 | return regmap_read(ddata->m4_state.map, ddata->m4_state.reg, state); | |
789 | } | |
790 | ||
13140de0 FD |
791 | static int stm32_rproc_probe(struct platform_device *pdev) |
792 | { | |
793 | struct device *dev = &pdev->dev; | |
794 | struct stm32_rproc *ddata; | |
795 | struct device_node *np = dev->of_node; | |
796 | struct rproc *rproc; | |
376ffdc0 | 797 | unsigned int state; |
13140de0 FD |
798 | int ret; |
799 | ||
800 | ret = dma_coerce_mask_and_coherent(dev, DMA_BIT_MASK(32)); | |
801 | if (ret) | |
802 | return ret; | |
803 | ||
804 | rproc = rproc_alloc(dev, np->name, &st_rproc_ops, NULL, sizeof(*ddata)); | |
805 | if (!rproc) | |
806 | return -ENOMEM; | |
807 | ||
8210fc87 MP |
808 | ddata = rproc->priv; |
809 | ||
3898fc99 | 810 | rproc_coredump_set_elf_info(rproc, ELFCLASS32, EM_NONE); |
8210fc87 MP |
811 | |
812 | ret = stm32_rproc_parse_dt(pdev, ddata, &rproc->auto_boot); | |
813 | if (ret) | |
814 | goto free_rproc; | |
815 | ||
95e32f86 MP |
816 | ret = stm32_rproc_of_memory_translations(pdev, ddata); |
817 | if (ret) | |
818 | goto free_rproc; | |
819 | ||
376ffdc0 MP |
820 | ret = stm32_rproc_get_m4_status(ddata, &state); |
821 | if (ret) | |
822 | goto free_rproc; | |
823 | ||
6e20a051 | 824 | if (state == M4_STATE_CRUN) |
376ffdc0 MP |
825 | rproc->state = RPROC_DETACHED; |
826 | ||
13140de0 | 827 | rproc->has_iommu = false; |
714cf5e3 AP |
828 | ddata->workqueue = create_workqueue(dev_name(dev)); |
829 | if (!ddata->workqueue) { | |
830 | dev_err(dev, "cannot create workqueue\n"); | |
831 | ret = -ENOMEM; | |
dadbdb9c | 832 | goto free_resources; |
714cf5e3 | 833 | } |
13140de0 FD |
834 | |
835 | platform_set_drvdata(pdev, rproc); | |
836 | ||
4a56e423 FD |
837 | ret = stm32_rproc_request_mbox(rproc); |
838 | if (ret) | |
8210fc87 | 839 | goto free_wkq; |
13140de0 FD |
840 | |
841 | ret = rproc_add(rproc); | |
842 | if (ret) | |
843 | goto free_mb; | |
844 | ||
845 | return 0; | |
846 | ||
847 | free_mb: | |
848 | stm32_rproc_free_mbox(rproc); | |
714cf5e3 AP |
849 | free_wkq: |
850 | destroy_workqueue(ddata->workqueue); | |
dadbdb9c MP |
851 | free_resources: |
852 | rproc_resource_cleanup(rproc); | |
13140de0 | 853 | free_rproc: |
410119ee FD |
854 | if (device_may_wakeup(dev)) { |
855 | dev_pm_clear_wake_irq(dev); | |
856 | device_init_wakeup(dev, false); | |
857 | } | |
13140de0 FD |
858 | rproc_free(rproc); |
859 | return ret; | |
860 | } | |
861 | ||
862 | static int stm32_rproc_remove(struct platform_device *pdev) | |
863 | { | |
864 | struct rproc *rproc = platform_get_drvdata(pdev); | |
714cf5e3 | 865 | struct stm32_rproc *ddata = rproc->priv; |
410119ee | 866 | struct device *dev = &pdev->dev; |
13140de0 FD |
867 | |
868 | if (atomic_read(&rproc->power) > 0) | |
869 | rproc_shutdown(rproc); | |
870 | ||
871 | rproc_del(rproc); | |
872 | stm32_rproc_free_mbox(rproc); | |
714cf5e3 | 873 | destroy_workqueue(ddata->workqueue); |
410119ee FD |
874 | |
875 | if (device_may_wakeup(dev)) { | |
876 | dev_pm_clear_wake_irq(dev); | |
877 | device_init_wakeup(dev, false); | |
878 | } | |
13140de0 FD |
879 | rproc_free(rproc); |
880 | ||
881 | return 0; | |
882 | } | |
883 | ||
410119ee FD |
884 | static int __maybe_unused stm32_rproc_suspend(struct device *dev) |
885 | { | |
886 | struct rproc *rproc = dev_get_drvdata(dev); | |
887 | struct stm32_rproc *ddata = rproc->priv; | |
888 | ||
889 | if (device_may_wakeup(dev)) | |
890 | return enable_irq_wake(ddata->wdg_irq); | |
891 | ||
892 | return 0; | |
893 | } | |
894 | ||
895 | static int __maybe_unused stm32_rproc_resume(struct device *dev) | |
896 | { | |
897 | struct rproc *rproc = dev_get_drvdata(dev); | |
898 | struct stm32_rproc *ddata = rproc->priv; | |
899 | ||
900 | if (device_may_wakeup(dev)) | |
901 | return disable_irq_wake(ddata->wdg_irq); | |
902 | ||
903 | return 0; | |
904 | } | |
905 | ||
906 | static SIMPLE_DEV_PM_OPS(stm32_rproc_pm_ops, | |
907 | stm32_rproc_suspend, stm32_rproc_resume); | |
908 | ||
13140de0 FD |
909 | static struct platform_driver stm32_rproc_driver = { |
910 | .probe = stm32_rproc_probe, | |
911 | .remove = stm32_rproc_remove, | |
912 | .driver = { | |
913 | .name = "stm32-rproc", | |
410119ee | 914 | .pm = &stm32_rproc_pm_ops, |
13140de0 FD |
915 | .of_match_table = of_match_ptr(stm32_rproc_match), |
916 | }, | |
917 | }; | |
918 | module_platform_driver(stm32_rproc_driver); | |
919 | ||
920 | MODULE_DESCRIPTION("STM32 Remote Processor Control Driver"); | |
921 | MODULE_AUTHOR("Ludovic Barre <ludovic.barre@st.com>"); | |
922 | MODULE_AUTHOR("Fabien Dessenne <fabien.dessenne@st.com>"); | |
923 | MODULE_LICENSE("GPL v2"); | |
924 |