1 // SPDX-License-Identifier: GPL-2.0
5  * Copyright (C) 2016-2018 Linaro Ltd.
7  * Copyright (c) 2012-2013, The Linux Foundation. All rights reserved.
21  * qcom_q6v5_prepare() - reinitialize the qcom_q6v5 context before start
28 	reinit_completion(&q6v5->start_done);  in qcom_q6v5_prepare()
29 	reinit_completion(&q6v5->stop_done);  in qcom_q6v5_prepare()
31 	q6v5->running = true;  in qcom_q6v5_prepare()
32 	q6v5->handover_issued = false;  in qcom_q6v5_prepare()
34 	enable_irq(q6v5->handover_irq);  in qcom_q6v5_prepare()
41  * qcom_q6v5_unprepare() - unprepare the qcom_q6v5 context after stop
48 	disable_irq(q6v5->handover_irq);  in qcom_q6v5_unprepare()
50 	return !q6v5->handover_issued;  in qcom_q6v5_unprepare()
60 	/* Sometimes the stop triggers a watchdog rather than a stop-ack */  in q6v5_wdog_interrupt()
61 	if (!q6v5->running) {  in q6v5_wdog_interrupt()
62 		complete(&q6v5->stop_done);  in q6v5_wdog_interrupt()
66 	msg = qcom_smem_get(QCOM_SMEM_HOST_ANY, q6v5->crash_reason, &len);  in q6v5_wdog_interrupt()
68 		dev_err(q6v5->dev, "watchdog received: %s\n", msg);  in q6v5_wdog_interrupt()
70 		dev_err(q6v5->dev, "watchdog without message\n");  in q6v5_wdog_interrupt()
72 	rproc_report_crash(q6v5->rproc, RPROC_WATCHDOG);  in q6v5_wdog_interrupt()
83 	msg = qcom_smem_get(QCOM_SMEM_HOST_ANY, q6v5->crash_reason, &len);  in q6v5_fatal_interrupt()
85 		dev_err(q6v5->dev, "fatal error received: %s\n", msg);  in q6v5_fatal_interrupt()
87 		dev_err(q6v5->dev, "fatal error without message\n");  in q6v5_fatal_interrupt()
89 	q6v5->running = false;  in q6v5_fatal_interrupt()
90 	rproc_report_crash(q6v5->rproc, RPROC_FATAL_ERROR);  in q6v5_fatal_interrupt()
99 	complete(&q6v5->start_done);  in q6v5_ready_interrupt()
105  * qcom_q6v5_wait_for_start() - wait for remote processor start signal
111  * Return: 0 on success, -ETIMEDOUT on timeout
117 	ret = wait_for_completion_timeout(&q6v5->start_done, timeout);  in qcom_q6v5_wait_for_start()
119 		disable_irq(q6v5->handover_irq);  in qcom_q6v5_wait_for_start()
121 	return !ret ? -ETIMEDOUT : 0;  in qcom_q6v5_wait_for_start()
129 	if (q6v5->handover)  in q6v5_handover_interrupt()
130 		q6v5->handover(q6v5);  in q6v5_handover_interrupt()
132 	q6v5->handover_issued = true;  in q6v5_handover_interrupt()
141 	complete(&q6v5->stop_done);  in q6v5_stop_interrupt()
147  * qcom_q6v5_request_stop() - request the remote processor to stop
156 	q6v5->running = false;  in qcom_q6v5_request_stop()
158 	qcom_smem_state_update_bits(q6v5->state,  in qcom_q6v5_request_stop()
159 				    BIT(q6v5->stop_bit), BIT(q6v5->stop_bit));  in qcom_q6v5_request_stop()
161 	ret = wait_for_completion_timeout(&q6v5->stop_done, 5 * HZ);  in qcom_q6v5_request_stop()
163 	qcom_smem_state_update_bits(q6v5->state, BIT(q6v5->stop_bit), 0);  in qcom_q6v5_request_stop()
165 	return ret == 0 ? -ETIMEDOUT : 0;  in qcom_q6v5_request_stop()
170  * qcom_q6v5_panic() - panic handler to invoke a stop on the remote
173  * Set the stop bit and sleep in order to allow the remote processor to flush
180 	qcom_smem_state_update_bits(q6v5->state,  in qcom_q6v5_panic()
181 				    BIT(q6v5->stop_bit), BIT(q6v5->stop_bit));  in qcom_q6v5_panic()
188  * qcom_q6v5_init() - initializer of the q6v5 common struct
203 	q6v5->rproc = rproc;  in qcom_q6v5_init()
204 	q6v5->dev = &pdev->dev;  in qcom_q6v5_init()
205 	q6v5->crash_reason = crash_reason;  in qcom_q6v5_init()
206 	q6v5->handover = handover;  in qcom_q6v5_init()
208 	init_completion(&q6v5->start_done);  in qcom_q6v5_init()
209 	init_completion(&q6v5->stop_done);  in qcom_q6v5_init()
211 	q6v5->wdog_irq = platform_get_irq_byname(pdev, "wdog");  in qcom_q6v5_init()
212 	if (q6v5->wdog_irq < 0)  in qcom_q6v5_init()
213 		return q6v5->wdog_irq;  in qcom_q6v5_init()
215 	ret = devm_request_threaded_irq(&pdev->dev, q6v5->wdog_irq,  in qcom_q6v5_init()
220 		dev_err(&pdev->dev, "failed to acquire wdog IRQ\n");  in qcom_q6v5_init()
224 	q6v5->fatal_irq = platform_get_irq_byname(pdev, "fatal");  in qcom_q6v5_init()
225 	if (q6v5->fatal_irq < 0)  in qcom_q6v5_init()
226 		return q6v5->fatal_irq;  in qcom_q6v5_init()
228 	ret = devm_request_threaded_irq(&pdev->dev, q6v5->fatal_irq,  in qcom_q6v5_init()
233 		dev_err(&pdev->dev, "failed to acquire fatal IRQ\n");  in qcom_q6v5_init()
237 	q6v5->ready_irq = platform_get_irq_byname(pdev, "ready");  in qcom_q6v5_init()
238 	if (q6v5->ready_irq < 0)  in qcom_q6v5_init()
239 		return q6v5->ready_irq;  in qcom_q6v5_init()
241 	ret = devm_request_threaded_irq(&pdev->dev, q6v5->ready_irq,  in qcom_q6v5_init()
246 		dev_err(&pdev->dev, "failed to acquire ready IRQ\n");  in qcom_q6v5_init()
250 	q6v5->handover_irq = platform_get_irq_byname(pdev, "handover");  in qcom_q6v5_init()
251 	if (q6v5->handover_irq < 0)  in qcom_q6v5_init()
252 		return q6v5->handover_irq;  in qcom_q6v5_init()
254 	ret = devm_request_threaded_irq(&pdev->dev, q6v5->handover_irq,  in qcom_q6v5_init()
259 		dev_err(&pdev->dev, "failed to acquire handover IRQ\n");  in qcom_q6v5_init()
262 	disable_irq(q6v5->handover_irq);  in qcom_q6v5_init()
264 	q6v5->stop_irq = platform_get_irq_byname(pdev, "stop-ack");  in qcom_q6v5_init()
265 	if (q6v5->stop_irq < 0)  in qcom_q6v5_init()
266 		return q6v5->stop_irq;  in qcom_q6v5_init()
268 	ret = devm_request_threaded_irq(&pdev->dev, q6v5->stop_irq,  in qcom_q6v5_init()
271 					"q6v5 stop", q6v5);  in qcom_q6v5_init()
273 		dev_err(&pdev->dev, "failed to acquire stop-ack IRQ\n");  in qcom_q6v5_init()
277 	q6v5->state = qcom_smem_state_get(&pdev->dev, "stop", &q6v5->stop_bit);  in qcom_q6v5_init()
278 	if (IS_ERR(q6v5->state)) {  in qcom_q6v5_init()
279 		dev_err(&pdev->dev, "failed to acquire stop state\n");  in qcom_q6v5_init()
280 		return PTR_ERR(q6v5->state);  in qcom_q6v5_init()