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294 lines
7.5 KiB
294 lines
7.5 KiB
// SPDX-License-Identifier: GPL-2.0 |
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/* |
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* Qualcomm Peripheral Image Loader for Q6V5 |
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* |
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* Copyright (C) 2016-2018 Linaro Ltd. |
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* Copyright (C) 2014 Sony Mobile Communications AB |
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* Copyright (c) 2012-2013, The Linux Foundation. All rights reserved. |
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*/ |
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#include <linux/kernel.h> |
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#include <linux/platform_device.h> |
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#include <linux/interrupt.h> |
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#include <linux/module.h> |
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#include <linux/soc/qcom/smem.h> |
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#include <linux/soc/qcom/smem_state.h> |
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#include <linux/remoteproc.h> |
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#include "qcom_common.h" |
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#include "qcom_q6v5.h" |
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#define Q6V5_PANIC_DELAY_MS 200 |
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/** |
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* qcom_q6v5_prepare() - reinitialize the qcom_q6v5 context before start |
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* @q6v5: reference to qcom_q6v5 context to be reinitialized |
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* |
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* Return: 0 on success, negative errno on failure |
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*/ |
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int qcom_q6v5_prepare(struct qcom_q6v5 *q6v5) |
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{ |
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reinit_completion(&q6v5->start_done); |
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reinit_completion(&q6v5->stop_done); |
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q6v5->running = true; |
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q6v5->handover_issued = false; |
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enable_irq(q6v5->handover_irq); |
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return 0; |
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} |
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EXPORT_SYMBOL_GPL(qcom_q6v5_prepare); |
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/** |
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* qcom_q6v5_unprepare() - unprepare the qcom_q6v5 context after stop |
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* @q6v5: reference to qcom_q6v5 context to be unprepared |
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* |
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* Return: 0 on success, 1 if handover hasn't yet been called |
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*/ |
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int qcom_q6v5_unprepare(struct qcom_q6v5 *q6v5) |
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{ |
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disable_irq(q6v5->handover_irq); |
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return !q6v5->handover_issued; |
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} |
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EXPORT_SYMBOL_GPL(qcom_q6v5_unprepare); |
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static irqreturn_t q6v5_wdog_interrupt(int irq, void *data) |
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{ |
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struct qcom_q6v5 *q6v5 = data; |
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size_t len; |
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char *msg; |
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/* Sometimes the stop triggers a watchdog rather than a stop-ack */ |
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if (!q6v5->running) { |
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complete(&q6v5->stop_done); |
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return IRQ_HANDLED; |
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} |
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msg = qcom_smem_get(QCOM_SMEM_HOST_ANY, q6v5->crash_reason, &len); |
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if (!IS_ERR(msg) && len > 0 && msg[0]) |
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dev_err(q6v5->dev, "watchdog received: %s\n", msg); |
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else |
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dev_err(q6v5->dev, "watchdog without message\n"); |
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rproc_report_crash(q6v5->rproc, RPROC_WATCHDOG); |
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return IRQ_HANDLED; |
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} |
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static irqreturn_t q6v5_fatal_interrupt(int irq, void *data) |
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{ |
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struct qcom_q6v5 *q6v5 = data; |
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size_t len; |
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char *msg; |
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msg = qcom_smem_get(QCOM_SMEM_HOST_ANY, q6v5->crash_reason, &len); |
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if (!IS_ERR(msg) && len > 0 && msg[0]) |
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dev_err(q6v5->dev, "fatal error received: %s\n", msg); |
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else |
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dev_err(q6v5->dev, "fatal error without message\n"); |
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q6v5->running = false; |
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rproc_report_crash(q6v5->rproc, RPROC_FATAL_ERROR); |
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return IRQ_HANDLED; |
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} |
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static irqreturn_t q6v5_ready_interrupt(int irq, void *data) |
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{ |
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struct qcom_q6v5 *q6v5 = data; |
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complete(&q6v5->start_done); |
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return IRQ_HANDLED; |
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} |
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/** |
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* qcom_q6v5_wait_for_start() - wait for remote processor start signal |
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* @q6v5: reference to qcom_q6v5 context |
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* @timeout: timeout to wait for the event, in jiffies |
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* |
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* qcom_q6v5_unprepare() should not be called when this function fails. |
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* |
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* Return: 0 on success, -ETIMEDOUT on timeout |
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*/ |
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int qcom_q6v5_wait_for_start(struct qcom_q6v5 *q6v5, int timeout) |
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{ |
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int ret; |
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ret = wait_for_completion_timeout(&q6v5->start_done, timeout); |
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if (!ret) |
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disable_irq(q6v5->handover_irq); |
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return !ret ? -ETIMEDOUT : 0; |
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} |
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EXPORT_SYMBOL_GPL(qcom_q6v5_wait_for_start); |
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static irqreturn_t q6v5_handover_interrupt(int irq, void *data) |
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{ |
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struct qcom_q6v5 *q6v5 = data; |
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if (q6v5->handover) |
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q6v5->handover(q6v5); |
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q6v5->handover_issued = true; |
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return IRQ_HANDLED; |
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} |
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static irqreturn_t q6v5_stop_interrupt(int irq, void *data) |
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{ |
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struct qcom_q6v5 *q6v5 = data; |
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complete(&q6v5->stop_done); |
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return IRQ_HANDLED; |
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} |
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/** |
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* qcom_q6v5_request_stop() - request the remote processor to stop |
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* @q6v5: reference to qcom_q6v5 context |
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* @sysmon: reference to the remote's sysmon instance, or NULL |
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* |
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* Return: 0 on success, negative errno on failure |
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*/ |
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int qcom_q6v5_request_stop(struct qcom_q6v5 *q6v5, struct qcom_sysmon *sysmon) |
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{ |
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int ret; |
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q6v5->running = false; |
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/* Don't perform SMP2P dance if sysmon already shut down the remote */ |
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if (qcom_sysmon_shutdown_acked(sysmon)) |
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return 0; |
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qcom_smem_state_update_bits(q6v5->state, |
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BIT(q6v5->stop_bit), BIT(q6v5->stop_bit)); |
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ret = wait_for_completion_timeout(&q6v5->stop_done, 5 * HZ); |
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qcom_smem_state_update_bits(q6v5->state, BIT(q6v5->stop_bit), 0); |
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return ret == 0 ? -ETIMEDOUT : 0; |
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} |
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EXPORT_SYMBOL_GPL(qcom_q6v5_request_stop); |
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/** |
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* qcom_q6v5_panic() - panic handler to invoke a stop on the remote |
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* @q6v5: reference to qcom_q6v5 context |
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* |
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* Set the stop bit and sleep in order to allow the remote processor to flush |
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* its caches etc for post mortem debugging. |
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* |
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* Return: 200ms |
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*/ |
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unsigned long qcom_q6v5_panic(struct qcom_q6v5 *q6v5) |
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{ |
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qcom_smem_state_update_bits(q6v5->state, |
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BIT(q6v5->stop_bit), BIT(q6v5->stop_bit)); |
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return Q6V5_PANIC_DELAY_MS; |
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} |
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EXPORT_SYMBOL_GPL(qcom_q6v5_panic); |
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/** |
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* qcom_q6v5_init() - initializer of the q6v5 common struct |
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* @q6v5: handle to be initialized |
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* @pdev: platform_device reference for acquiring resources |
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* @rproc: associated remoteproc instance |
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* @crash_reason: SMEM id for crash reason string, or 0 if none |
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* @handover: function to be called when proxy resources should be released |
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* |
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* Return: 0 on success, negative errno on failure |
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*/ |
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int qcom_q6v5_init(struct qcom_q6v5 *q6v5, struct platform_device *pdev, |
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struct rproc *rproc, int crash_reason, |
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void (*handover)(struct qcom_q6v5 *q6v5)) |
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{ |
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int ret; |
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q6v5->rproc = rproc; |
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q6v5->dev = &pdev->dev; |
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q6v5->crash_reason = crash_reason; |
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q6v5->handover = handover; |
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init_completion(&q6v5->start_done); |
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init_completion(&q6v5->stop_done); |
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q6v5->wdog_irq = platform_get_irq_byname(pdev, "wdog"); |
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if (q6v5->wdog_irq < 0) |
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return q6v5->wdog_irq; |
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ret = devm_request_threaded_irq(&pdev->dev, q6v5->wdog_irq, |
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NULL, q6v5_wdog_interrupt, |
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IRQF_TRIGGER_RISING | IRQF_ONESHOT, |
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"q6v5 wdog", q6v5); |
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if (ret) { |
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dev_err(&pdev->dev, "failed to acquire wdog IRQ\n"); |
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return ret; |
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} |
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q6v5->fatal_irq = platform_get_irq_byname(pdev, "fatal"); |
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if (q6v5->fatal_irq < 0) |
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return q6v5->fatal_irq; |
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ret = devm_request_threaded_irq(&pdev->dev, q6v5->fatal_irq, |
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NULL, q6v5_fatal_interrupt, |
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IRQF_TRIGGER_RISING | IRQF_ONESHOT, |
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"q6v5 fatal", q6v5); |
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if (ret) { |
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dev_err(&pdev->dev, "failed to acquire fatal IRQ\n"); |
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return ret; |
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} |
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q6v5->ready_irq = platform_get_irq_byname(pdev, "ready"); |
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if (q6v5->ready_irq < 0) |
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return q6v5->ready_irq; |
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ret = devm_request_threaded_irq(&pdev->dev, q6v5->ready_irq, |
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NULL, q6v5_ready_interrupt, |
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IRQF_TRIGGER_RISING | IRQF_ONESHOT, |
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"q6v5 ready", q6v5); |
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if (ret) { |
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dev_err(&pdev->dev, "failed to acquire ready IRQ\n"); |
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return ret; |
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} |
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q6v5->handover_irq = platform_get_irq_byname(pdev, "handover"); |
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if (q6v5->handover_irq < 0) |
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return q6v5->handover_irq; |
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ret = devm_request_threaded_irq(&pdev->dev, q6v5->handover_irq, |
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NULL, q6v5_handover_interrupt, |
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IRQF_TRIGGER_RISING | IRQF_ONESHOT, |
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"q6v5 handover", q6v5); |
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if (ret) { |
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dev_err(&pdev->dev, "failed to acquire handover IRQ\n"); |
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return ret; |
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} |
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disable_irq(q6v5->handover_irq); |
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q6v5->stop_irq = platform_get_irq_byname(pdev, "stop-ack"); |
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if (q6v5->stop_irq < 0) |
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return q6v5->stop_irq; |
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ret = devm_request_threaded_irq(&pdev->dev, q6v5->stop_irq, |
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NULL, q6v5_stop_interrupt, |
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IRQF_TRIGGER_RISING | IRQF_ONESHOT, |
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"q6v5 stop", q6v5); |
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if (ret) { |
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dev_err(&pdev->dev, "failed to acquire stop-ack IRQ\n"); |
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return ret; |
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} |
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q6v5->state = qcom_smem_state_get(&pdev->dev, "stop", &q6v5->stop_bit); |
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if (IS_ERR(q6v5->state)) { |
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dev_err(&pdev->dev, "failed to acquire stop state\n"); |
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return PTR_ERR(q6v5->state); |
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} |
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return 0; |
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} |
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EXPORT_SYMBOL_GPL(qcom_q6v5_init); |
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MODULE_LICENSE("GPL v2"); |
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MODULE_DESCRIPTION("Qualcomm Peripheral Image Loader for Q6V5");
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