Author | Tokens | Token Proportion | Commits | Commit Proportion |
---|---|---|---|---|
Björn Andersson | 976 | 92.34% | 2 | 40.00% |
Arnd Bergmann | 38 | 3.60% | 1 | 20.00% |
Brian Norris | 37 | 3.50% | 1 | 20.00% |
Sibi Sankar | 6 | 0.57% | 1 | 20.00% |
Total | 1057 | 5 |
// SPDX-License-Identifier: GPL-2.0 /* * Qualcomm Peripheral Image Loader for Q6V5 * * Copyright (C) 2016-2018 Linaro Ltd. * Copyright (C) 2014 Sony Mobile Communications AB * Copyright (c) 2012-2013, The Linux Foundation. All rights reserved. */ #include <linux/kernel.h> #include <linux/platform_device.h> #include <linux/interrupt.h> #include <linux/module.h> #include <linux/soc/qcom/smem.h> #include <linux/soc/qcom/smem_state.h> #include <linux/remoteproc.h> #include "qcom_q6v5.h" /** * qcom_q6v5_prepare() - reinitialize the qcom_q6v5 context before start * @q6v5: reference to qcom_q6v5 context to be reinitialized * * Return: 0 on success, negative errno on failure */ int qcom_q6v5_prepare(struct qcom_q6v5 *q6v5) { reinit_completion(&q6v5->start_done); reinit_completion(&q6v5->stop_done); q6v5->running = true; q6v5->handover_issued = false; enable_irq(q6v5->handover_irq); return 0; } EXPORT_SYMBOL_GPL(qcom_q6v5_prepare); /** * qcom_q6v5_unprepare() - unprepare the qcom_q6v5 context after stop * @q6v5: reference to qcom_q6v5 context to be unprepared * * Return: 0 on success, 1 if handover hasn't yet been called */ int qcom_q6v5_unprepare(struct qcom_q6v5 *q6v5) { disable_irq(q6v5->handover_irq); return !q6v5->handover_issued; } EXPORT_SYMBOL_GPL(qcom_q6v5_unprepare); static irqreturn_t q6v5_wdog_interrupt(int irq, void *data) { struct qcom_q6v5 *q6v5 = data; size_t len; char *msg; /* Sometimes the stop triggers a watchdog rather than a stop-ack */ if (!q6v5->running) { complete(&q6v5->stop_done); return IRQ_HANDLED; } msg = qcom_smem_get(QCOM_SMEM_HOST_ANY, q6v5->crash_reason, &len); if (!IS_ERR(msg) && len > 0 && msg[0]) dev_err(q6v5->dev, "watchdog received: %s\n", msg); else dev_err(q6v5->dev, "watchdog without message\n"); rproc_report_crash(q6v5->rproc, RPROC_WATCHDOG); return IRQ_HANDLED; } static irqreturn_t q6v5_fatal_interrupt(int irq, void *data) { struct qcom_q6v5 *q6v5 = data; size_t len; char *msg; msg = qcom_smem_get(QCOM_SMEM_HOST_ANY, q6v5->crash_reason, &len); if (!IS_ERR(msg) && len > 0 && msg[0]) dev_err(q6v5->dev, "fatal error received: %s\n", msg); else dev_err(q6v5->dev, "fatal error without message\n"); q6v5->running = false; rproc_report_crash(q6v5->rproc, RPROC_FATAL_ERROR); return IRQ_HANDLED; } static irqreturn_t q6v5_ready_interrupt(int irq, void *data) { struct qcom_q6v5 *q6v5 = data; complete(&q6v5->start_done); return IRQ_HANDLED; } /** * qcom_q6v5_wait_for_start() - wait for remote processor start signal * @q6v5: reference to qcom_q6v5 context * @timeout: timeout to wait for the event, in jiffies * * qcom_q6v5_unprepare() should not be called when this function fails. * * Return: 0 on success, -ETIMEDOUT on timeout */ int qcom_q6v5_wait_for_start(struct qcom_q6v5 *q6v5, int timeout) { int ret; ret = wait_for_completion_timeout(&q6v5->start_done, timeout); if (!ret) disable_irq(q6v5->handover_irq); return !ret ? -ETIMEDOUT : 0; } EXPORT_SYMBOL_GPL(qcom_q6v5_wait_for_start); static irqreturn_t q6v5_handover_interrupt(int irq, void *data) { struct qcom_q6v5 *q6v5 = data; if (q6v5->handover) q6v5->handover(q6v5); q6v5->handover_issued = true; return IRQ_HANDLED; } static irqreturn_t q6v5_stop_interrupt(int irq, void *data) { struct qcom_q6v5 *q6v5 = data; complete(&q6v5->stop_done); return IRQ_HANDLED; } /** * qcom_q6v5_request_stop() - request the remote processor to stop * @q6v5: reference to qcom_q6v5 context * * Return: 0 on success, negative errno on failure */ int qcom_q6v5_request_stop(struct qcom_q6v5 *q6v5) { int ret; qcom_smem_state_update_bits(q6v5->state, BIT(q6v5->stop_bit), BIT(q6v5->stop_bit)); ret = wait_for_completion_timeout(&q6v5->stop_done, 5 * HZ); qcom_smem_state_update_bits(q6v5->state, BIT(q6v5->stop_bit), 0); return ret == 0 ? -ETIMEDOUT : 0; } EXPORT_SYMBOL_GPL(qcom_q6v5_request_stop); /** * qcom_q6v5_init() - initializer of the q6v5 common struct * @q6v5: handle to be initialized * @pdev: platform_device reference for acquiring resources * @rproc: associated remoteproc instance * @crash_reason: SMEM id for crash reason string, or 0 if none * @handover: function to be called when proxy resources should be released * * Return: 0 on success, negative errno on failure */ int qcom_q6v5_init(struct qcom_q6v5 *q6v5, struct platform_device *pdev, struct rproc *rproc, int crash_reason, void (*handover)(struct qcom_q6v5 *q6v5)) { int ret; q6v5->rproc = rproc; q6v5->dev = &pdev->dev; q6v5->crash_reason = crash_reason; q6v5->handover = handover; init_completion(&q6v5->start_done); init_completion(&q6v5->stop_done); q6v5->wdog_irq = platform_get_irq_byname(pdev, "wdog"); if (q6v5->wdog_irq < 0) return q6v5->wdog_irq; ret = devm_request_threaded_irq(&pdev->dev, q6v5->wdog_irq, NULL, q6v5_wdog_interrupt, IRQF_TRIGGER_RISING | IRQF_ONESHOT, "q6v5 wdog", q6v5); if (ret) { dev_err(&pdev->dev, "failed to acquire wdog IRQ\n"); return ret; } q6v5->fatal_irq = platform_get_irq_byname(pdev, "fatal"); if (q6v5->fatal_irq < 0) return q6v5->fatal_irq; ret = devm_request_threaded_irq(&pdev->dev, q6v5->fatal_irq, NULL, q6v5_fatal_interrupt, IRQF_TRIGGER_RISING | IRQF_ONESHOT, "q6v5 fatal", q6v5); if (ret) { dev_err(&pdev->dev, "failed to acquire fatal IRQ\n"); return ret; } q6v5->ready_irq = platform_get_irq_byname(pdev, "ready"); if (q6v5->ready_irq < 0) return q6v5->ready_irq; ret = devm_request_threaded_irq(&pdev->dev, q6v5->ready_irq, NULL, q6v5_ready_interrupt, IRQF_TRIGGER_RISING | IRQF_ONESHOT, "q6v5 ready", q6v5); if (ret) { dev_err(&pdev->dev, "failed to acquire ready IRQ\n"); return ret; } q6v5->handover_irq = platform_get_irq_byname(pdev, "handover"); if (q6v5->handover_irq < 0) return q6v5->handover_irq; ret = devm_request_threaded_irq(&pdev->dev, q6v5->handover_irq, NULL, q6v5_handover_interrupt, IRQF_TRIGGER_RISING | IRQF_ONESHOT, "q6v5 handover", q6v5); if (ret) { dev_err(&pdev->dev, "failed to acquire handover IRQ\n"); return ret; } disable_irq(q6v5->handover_irq); q6v5->stop_irq = platform_get_irq_byname(pdev, "stop-ack"); if (q6v5->stop_irq < 0) return q6v5->stop_irq; ret = devm_request_threaded_irq(&pdev->dev, q6v5->stop_irq, NULL, q6v5_stop_interrupt, IRQF_TRIGGER_RISING | IRQF_ONESHOT, "q6v5 stop", q6v5); if (ret) { dev_err(&pdev->dev, "failed to acquire stop-ack IRQ\n"); return ret; } q6v5->state = qcom_smem_state_get(&pdev->dev, "stop", &q6v5->stop_bit); if (IS_ERR(q6v5->state)) { dev_err(&pdev->dev, "failed to acquire stop state\n"); return PTR_ERR(q6v5->state); } return 0; } EXPORT_SYMBOL_GPL(qcom_q6v5_init); MODULE_LICENSE("GPL v2"); MODULE_DESCRIPTION("Qualcomm Peripheral Image Loader for Q6V5");
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