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3b415c8f BA |
1 | // SPDX-License-Identifier: GPL-2.0 |
2 | /* | |
3 | * Qualcomm Peripheral Image Loader for Q6V5 | |
4 | * | |
5 | * Copyright (C) 2016-2018 Linaro Ltd. | |
6 | * Copyright (C) 2014 Sony Mobile Communications AB | |
7 | * Copyright (c) 2012-2013, The Linux Foundation. All rights reserved. | |
8 | */ | |
9 | #include <linux/kernel.h> | |
10 | #include <linux/platform_device.h> | |
8d9be5c6 | 11 | #include <linux/interconnect.h> |
3b415c8f | 12 | #include <linux/interrupt.h> |
ded79d06 | 13 | #include <linux/module.h> |
eee412e9 | 14 | #include <linux/soc/qcom/qcom_aoss.h> |
3b415c8f BA |
15 | #include <linux/soc/qcom/smem.h> |
16 | #include <linux/soc/qcom/smem_state.h> | |
17 | #include <linux/remoteproc.h> | |
ed5da808 | 18 | #include "qcom_common.h" |
3b415c8f BA |
19 | #include "qcom_q6v5.h" |
20 | ||
c1fe10d2 | 21 | #define Q6V5_LOAD_STATE_MSG_LEN 64 |
e9142f5c BA |
22 | #define Q6V5_PANIC_DELAY_MS 200 |
23 | ||
c1fe10d2 SS |
24 | static int q6v5_load_state_toggle(struct qcom_q6v5 *q6v5, bool enable) |
25 | { | |
c1fe10d2 SS |
26 | int ret; |
27 | ||
28 | if (!q6v5->qmp) | |
29 | return 0; | |
30 | ||
b4f63bbf | 31 | ret = qmp_send(q6v5->qmp, "{class: image, res: load_state, name: %s, val: %s}", |
c1fe10d2 | 32 | q6v5->load_state, enable ? "on" : "off"); |
c1fe10d2 SS |
33 | if (ret) |
34 | dev_err(q6v5->dev, "failed to toggle load state\n"); | |
35 | ||
36 | return ret; | |
37 | } | |
38 | ||
3b415c8f BA |
39 | /** |
40 | * qcom_q6v5_prepare() - reinitialize the qcom_q6v5 context before start | |
41 | * @q6v5: reference to qcom_q6v5 context to be reinitialized | |
42 | * | |
43 | * Return: 0 on success, negative errno on failure | |
44 | */ | |
45 | int qcom_q6v5_prepare(struct qcom_q6v5 *q6v5) | |
46 | { | |
c1fe10d2 SS |
47 | int ret; |
48 | ||
8d9be5c6 BA |
49 | ret = icc_set_bw(q6v5->path, 0, UINT_MAX); |
50 | if (ret < 0) { | |
51 | dev_err(q6v5->dev, "failed to set bandwidth request\n"); | |
52 | return ret; | |
53 | } | |
54 | ||
c1fe10d2 | 55 | ret = q6v5_load_state_toggle(q6v5, true); |
8d9be5c6 BA |
56 | if (ret) { |
57 | icc_set_bw(q6v5->path, 0, 0); | |
c1fe10d2 | 58 | return ret; |
8d9be5c6 | 59 | } |
c1fe10d2 | 60 | |
3b415c8f BA |
61 | reinit_completion(&q6v5->start_done); |
62 | reinit_completion(&q6v5->stop_done); | |
63 | ||
64 | q6v5->running = true; | |
65 | q6v5->handover_issued = false; | |
66 | ||
67 | enable_irq(q6v5->handover_irq); | |
68 | ||
69 | return 0; | |
70 | } | |
ded79d06 | 71 | EXPORT_SYMBOL_GPL(qcom_q6v5_prepare); |
3b415c8f BA |
72 | |
73 | /** | |
74 | * qcom_q6v5_unprepare() - unprepare the qcom_q6v5 context after stop | |
75 | * @q6v5: reference to qcom_q6v5 context to be unprepared | |
76 | * | |
77 | * Return: 0 on success, 1 if handover hasn't yet been called | |
78 | */ | |
79 | int qcom_q6v5_unprepare(struct qcom_q6v5 *q6v5) | |
80 | { | |
81 | disable_irq(q6v5->handover_irq); | |
c1fe10d2 | 82 | q6v5_load_state_toggle(q6v5, false); |
3b415c8f | 83 | |
8d9be5c6 BA |
84 | /* Disable interconnect vote, in case handover never happened */ |
85 | icc_set_bw(q6v5->path, 0, 0); | |
86 | ||
3b415c8f BA |
87 | return !q6v5->handover_issued; |
88 | } | |
ded79d06 | 89 | EXPORT_SYMBOL_GPL(qcom_q6v5_unprepare); |
3b415c8f BA |
90 | |
91 | static irqreturn_t q6v5_wdog_interrupt(int irq, void *data) | |
92 | { | |
93 | struct qcom_q6v5 *q6v5 = data; | |
94 | size_t len; | |
95 | char *msg; | |
96 | ||
97 | /* Sometimes the stop triggers a watchdog rather than a stop-ack */ | |
98 | if (!q6v5->running) { | |
99 | complete(&q6v5->stop_done); | |
100 | return IRQ_HANDLED; | |
101 | } | |
102 | ||
103 | msg = qcom_smem_get(QCOM_SMEM_HOST_ANY, q6v5->crash_reason, &len); | |
104 | if (!IS_ERR(msg) && len > 0 && msg[0]) | |
105 | dev_err(q6v5->dev, "watchdog received: %s\n", msg); | |
106 | else | |
107 | dev_err(q6v5->dev, "watchdog without message\n"); | |
108 | ||
0ad7e3ed | 109 | q6v5->running = false; |
3b415c8f BA |
110 | rproc_report_crash(q6v5->rproc, RPROC_WATCHDOG); |
111 | ||
112 | return IRQ_HANDLED; | |
113 | } | |
114 | ||
115 | static irqreturn_t q6v5_fatal_interrupt(int irq, void *data) | |
116 | { | |
117 | struct qcom_q6v5 *q6v5 = data; | |
118 | size_t len; | |
119 | char *msg; | |
120 | ||
0ad7e3ed SG |
121 | if (!q6v5->running) |
122 | return IRQ_HANDLED; | |
123 | ||
3b415c8f BA |
124 | msg = qcom_smem_get(QCOM_SMEM_HOST_ANY, q6v5->crash_reason, &len); |
125 | if (!IS_ERR(msg) && len > 0 && msg[0]) | |
126 | dev_err(q6v5->dev, "fatal error received: %s\n", msg); | |
127 | else | |
128 | dev_err(q6v5->dev, "fatal error without message\n"); | |
129 | ||
d3ae96c0 | 130 | q6v5->running = false; |
3b415c8f BA |
131 | rproc_report_crash(q6v5->rproc, RPROC_FATAL_ERROR); |
132 | ||
133 | return IRQ_HANDLED; | |
134 | } | |
135 | ||
136 | static irqreturn_t q6v5_ready_interrupt(int irq, void *data) | |
137 | { | |
138 | struct qcom_q6v5 *q6v5 = data; | |
139 | ||
140 | complete(&q6v5->start_done); | |
141 | ||
142 | return IRQ_HANDLED; | |
143 | } | |
144 | ||
145 | /** | |
146 | * qcom_q6v5_wait_for_start() - wait for remote processor start signal | |
147 | * @q6v5: reference to qcom_q6v5 context | |
148 | * @timeout: timeout to wait for the event, in jiffies | |
149 | * | |
150 | * qcom_q6v5_unprepare() should not be called when this function fails. | |
151 | * | |
152 | * Return: 0 on success, -ETIMEDOUT on timeout | |
153 | */ | |
154 | int qcom_q6v5_wait_for_start(struct qcom_q6v5 *q6v5, int timeout) | |
155 | { | |
156 | int ret; | |
157 | ||
158 | ret = wait_for_completion_timeout(&q6v5->start_done, timeout); | |
159 | if (!ret) | |
160 | disable_irq(q6v5->handover_irq); | |
161 | ||
162 | return !ret ? -ETIMEDOUT : 0; | |
163 | } | |
ded79d06 | 164 | EXPORT_SYMBOL_GPL(qcom_q6v5_wait_for_start); |
3b415c8f BA |
165 | |
166 | static irqreturn_t q6v5_handover_interrupt(int irq, void *data) | |
167 | { | |
168 | struct qcom_q6v5 *q6v5 = data; | |
169 | ||
170 | if (q6v5->handover) | |
171 | q6v5->handover(q6v5); | |
172 | ||
8d9be5c6 BA |
173 | icc_set_bw(q6v5->path, 0, 0); |
174 | ||
3b415c8f BA |
175 | q6v5->handover_issued = true; |
176 | ||
177 | return IRQ_HANDLED; | |
178 | } | |
179 | ||
180 | static irqreturn_t q6v5_stop_interrupt(int irq, void *data) | |
181 | { | |
182 | struct qcom_q6v5 *q6v5 = data; | |
183 | ||
184 | complete(&q6v5->stop_done); | |
185 | ||
186 | return IRQ_HANDLED; | |
187 | } | |
188 | ||
189 | /** | |
190 | * qcom_q6v5_request_stop() - request the remote processor to stop | |
191 | * @q6v5: reference to qcom_q6v5 context | |
ed5da808 | 192 | * @sysmon: reference to the remote's sysmon instance, or NULL |
3b415c8f BA |
193 | * |
194 | * Return: 0 on success, negative errno on failure | |
195 | */ | |
ed5da808 | 196 | int qcom_q6v5_request_stop(struct qcom_q6v5 *q6v5, struct qcom_sysmon *sysmon) |
3b415c8f BA |
197 | { |
198 | int ret; | |
199 | ||
5b7be880 SS |
200 | q6v5->running = false; |
201 | ||
3cc889eb GK |
202 | /* Don't perform SMP2P dance if remote isn't running */ |
203 | if (q6v5->rproc->state != RPROC_RUNNING || qcom_sysmon_shutdown_acked(sysmon)) | |
ed5da808 BA |
204 | return 0; |
205 | ||
3b415c8f BA |
206 | qcom_smem_state_update_bits(q6v5->state, |
207 | BIT(q6v5->stop_bit), BIT(q6v5->stop_bit)); | |
208 | ||
209 | ret = wait_for_completion_timeout(&q6v5->stop_done, 5 * HZ); | |
210 | ||
211 | qcom_smem_state_update_bits(q6v5->state, BIT(q6v5->stop_bit), 0); | |
212 | ||
213 | return ret == 0 ? -ETIMEDOUT : 0; | |
214 | } | |
ded79d06 | 215 | EXPORT_SYMBOL_GPL(qcom_q6v5_request_stop); |
3b415c8f | 216 | |
e9142f5c BA |
217 | /** |
218 | * qcom_q6v5_panic() - panic handler to invoke a stop on the remote | |
219 | * @q6v5: reference to qcom_q6v5 context | |
220 | * | |
221 | * Set the stop bit and sleep in order to allow the remote processor to flush | |
222 | * its caches etc for post mortem debugging. | |
223 | * | |
224 | * Return: 200ms | |
225 | */ | |
226 | unsigned long qcom_q6v5_panic(struct qcom_q6v5 *q6v5) | |
227 | { | |
228 | qcom_smem_state_update_bits(q6v5->state, | |
229 | BIT(q6v5->stop_bit), BIT(q6v5->stop_bit)); | |
230 | ||
231 | return Q6V5_PANIC_DELAY_MS; | |
232 | } | |
233 | EXPORT_SYMBOL_GPL(qcom_q6v5_panic); | |
234 | ||
3b415c8f BA |
235 | /** |
236 | * qcom_q6v5_init() - initializer of the q6v5 common struct | |
237 | * @q6v5: handle to be initialized | |
238 | * @pdev: platform_device reference for acquiring resources | |
239 | * @rproc: associated remoteproc instance | |
240 | * @crash_reason: SMEM id for crash reason string, or 0 if none | |
c1fe10d2 | 241 | * @load_state: load state resource string |
3b415c8f BA |
242 | * @handover: function to be called when proxy resources should be released |
243 | * | |
244 | * Return: 0 on success, negative errno on failure | |
245 | */ | |
246 | int qcom_q6v5_init(struct qcom_q6v5 *q6v5, struct platform_device *pdev, | |
c1fe10d2 | 247 | struct rproc *rproc, int crash_reason, const char *load_state, |
3b415c8f BA |
248 | void (*handover)(struct qcom_q6v5 *q6v5)) |
249 | { | |
250 | int ret; | |
251 | ||
252 | q6v5->rproc = rproc; | |
253 | q6v5->dev = &pdev->dev; | |
254 | q6v5->crash_reason = crash_reason; | |
255 | q6v5->handover = handover; | |
256 | ||
257 | init_completion(&q6v5->start_done); | |
258 | init_completion(&q6v5->stop_done); | |
259 | ||
260 | q6v5->wdog_irq = platform_get_irq_byname(pdev, "wdog"); | |
d446609d | 261 | if (q6v5->wdog_irq < 0) |
1e2517d1 | 262 | return q6v5->wdog_irq; |
1e2517d1 | 263 | |
3b415c8f BA |
264 | ret = devm_request_threaded_irq(&pdev->dev, q6v5->wdog_irq, |
265 | NULL, q6v5_wdog_interrupt, | |
266 | IRQF_TRIGGER_RISING | IRQF_ONESHOT, | |
267 | "q6v5 wdog", q6v5); | |
268 | if (ret) { | |
269 | dev_err(&pdev->dev, "failed to acquire wdog IRQ\n"); | |
270 | return ret; | |
271 | } | |
272 | ||
273 | q6v5->fatal_irq = platform_get_irq_byname(pdev, "fatal"); | |
d446609d | 274 | if (q6v5->fatal_irq < 0) |
1e2517d1 | 275 | return q6v5->fatal_irq; |
d5269c45 | 276 | |
3b415c8f BA |
277 | ret = devm_request_threaded_irq(&pdev->dev, q6v5->fatal_irq, |
278 | NULL, q6v5_fatal_interrupt, | |
279 | IRQF_TRIGGER_RISING | IRQF_ONESHOT, | |
280 | "q6v5 fatal", q6v5); | |
281 | if (ret) { | |
282 | dev_err(&pdev->dev, "failed to acquire fatal IRQ\n"); | |
283 | return ret; | |
284 | } | |
285 | ||
286 | q6v5->ready_irq = platform_get_irq_byname(pdev, "ready"); | |
d446609d | 287 | if (q6v5->ready_irq < 0) |
1e2517d1 | 288 | return q6v5->ready_irq; |
d5269c45 | 289 | |
3b415c8f BA |
290 | ret = devm_request_threaded_irq(&pdev->dev, q6v5->ready_irq, |
291 | NULL, q6v5_ready_interrupt, | |
292 | IRQF_TRIGGER_RISING | IRQF_ONESHOT, | |
293 | "q6v5 ready", q6v5); | |
294 | if (ret) { | |
295 | dev_err(&pdev->dev, "failed to acquire ready IRQ\n"); | |
296 | return ret; | |
297 | } | |
298 | ||
299 | q6v5->handover_irq = platform_get_irq_byname(pdev, "handover"); | |
d446609d | 300 | if (q6v5->handover_irq < 0) |
1e2517d1 | 301 | return q6v5->handover_irq; |
d5269c45 | 302 | |
3b415c8f BA |
303 | ret = devm_request_threaded_irq(&pdev->dev, q6v5->handover_irq, |
304 | NULL, q6v5_handover_interrupt, | |
305 | IRQF_TRIGGER_RISING | IRQF_ONESHOT, | |
306 | "q6v5 handover", q6v5); | |
307 | if (ret) { | |
308 | dev_err(&pdev->dev, "failed to acquire handover IRQ\n"); | |
309 | return ret; | |
310 | } | |
311 | disable_irq(q6v5->handover_irq); | |
312 | ||
313 | q6v5->stop_irq = platform_get_irq_byname(pdev, "stop-ack"); | |
d446609d | 314 | if (q6v5->stop_irq < 0) |
1e2517d1 | 315 | return q6v5->stop_irq; |
d5269c45 | 316 | |
3b415c8f BA |
317 | ret = devm_request_threaded_irq(&pdev->dev, q6v5->stop_irq, |
318 | NULL, q6v5_stop_interrupt, | |
319 | IRQF_TRIGGER_RISING | IRQF_ONESHOT, | |
320 | "q6v5 stop", q6v5); | |
321 | if (ret) { | |
322 | dev_err(&pdev->dev, "failed to acquire stop-ack IRQ\n"); | |
323 | return ret; | |
324 | } | |
325 | ||
632f1ca3 | 326 | q6v5->state = devm_qcom_smem_state_get(&pdev->dev, "stop", &q6v5->stop_bit); |
3b415c8f BA |
327 | if (IS_ERR(q6v5->state)) { |
328 | dev_err(&pdev->dev, "failed to acquire stop state\n"); | |
329 | return PTR_ERR(q6v5->state); | |
330 | } | |
331 | ||
c1fe10d2 SS |
332 | q6v5->load_state = devm_kstrdup_const(&pdev->dev, load_state, GFP_KERNEL); |
333 | q6v5->qmp = qmp_get(&pdev->dev); | |
334 | if (IS_ERR(q6v5->qmp)) { | |
335 | if (PTR_ERR(q6v5->qmp) != -ENODEV) | |
336 | return dev_err_probe(&pdev->dev, PTR_ERR(q6v5->qmp), | |
337 | "failed to acquire load state\n"); | |
338 | q6v5->qmp = NULL; | |
339 | } else if (!q6v5->load_state) { | |
340 | if (!load_state) | |
341 | dev_err(&pdev->dev, "load state resource string empty\n"); | |
342 | ||
343 | qmp_put(q6v5->qmp); | |
344 | return load_state ? -ENOMEM : -EINVAL; | |
345 | } | |
346 | ||
8d9be5c6 BA |
347 | q6v5->path = devm_of_icc_get(&pdev->dev, NULL); |
348 | if (IS_ERR(q6v5->path)) | |
349 | return dev_err_probe(&pdev->dev, PTR_ERR(q6v5->path), | |
350 | "failed to acquire interconnect path\n"); | |
351 | ||
3b415c8f BA |
352 | return 0; |
353 | } | |
ded79d06 AB |
354 | EXPORT_SYMBOL_GPL(qcom_q6v5_init); |
355 | ||
c1fe10d2 SS |
356 | /** |
357 | * qcom_q6v5_deinit() - deinitialize the q6v5 common struct | |
358 | * @q6v5: reference to qcom_q6v5 context to be deinitialized | |
359 | */ | |
360 | void qcom_q6v5_deinit(struct qcom_q6v5 *q6v5) | |
361 | { | |
362 | qmp_put(q6v5->qmp); | |
363 | } | |
364 | EXPORT_SYMBOL_GPL(qcom_q6v5_deinit); | |
365 | ||
ded79d06 AB |
366 | MODULE_LICENSE("GPL v2"); |
367 | MODULE_DESCRIPTION("Qualcomm Peripheral Image Loader for Q6V5"); |