Commit 3b415c8f authored by Bjorn Andersson's avatar Bjorn Andersson

remoteproc: q6v5: Extract common resource handling

Shared between all Hexagon V5 based remoteprocs is the handling of the 5
interrupts and the SMP2P stop request, so break this out into a separate
function in order to allow these drivers to be cleaned up.
Reviewed-by: default avatarRohit kumar <rohitkr@codeaurora.org>
Tested-by: default avatarRohit kumar <rohitkr@codeaurora.org>
Signed-off-by: Bjorn Andersson's avatarBjorn Andersson <bjorn.andersson@linaro.org>
parent 0e622e80
......@@ -102,6 +102,11 @@ config QCOM_ADSP_PIL
config QCOM_RPROC_COMMON
tristate
config QCOM_Q6V5_COMMON
tristate
depends on ARCH_QCOM
depends on QCOM_SMEM
config QCOM_Q6V5_PIL
tristate "Qualcomm Hexagon V5 Peripherial Image Loader"
depends on OF && ARCH_QCOM
......
......@@ -16,6 +16,7 @@ obj-$(CONFIG_DA8XX_REMOTEPROC) += da8xx_remoteproc.o
obj-$(CONFIG_KEYSTONE_REMOTEPROC) += keystone_remoteproc.o
obj-$(CONFIG_QCOM_ADSP_PIL) += qcom_adsp_pil.o
obj-$(CONFIG_QCOM_RPROC_COMMON) += qcom_common.o
obj-$(CONFIG_QCOM_Q6V5_COMMON) += qcom_q6v5.o
obj-$(CONFIG_QCOM_Q6V5_PIL) += qcom_q6v5_pil.o
obj-$(CONFIG_QCOM_SYSMON) += qcom_sysmon.o
obj-$(CONFIG_QCOM_WCNSS_PIL) += qcom_wcnss_pil.o
......
// 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/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;
}
/**
* 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;
}
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");
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;
}
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;
q6v5->running = false;
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;
}
/**
* 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");
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");
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");
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");
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");
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;
}
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __QCOM_Q6V5_H__
#define __QCOM_Q6V5_H__
#include <linux/kernel.h>
#include <linux/completion.h>
struct rproc;
struct qcom_smem_state;
struct qcom_q6v5 {
struct device *dev;
struct rproc *rproc;
struct qcom_smem_state *state;
unsigned stop_bit;
int wdog_irq;
int fatal_irq;
int ready_irq;
int handover_irq;
int stop_irq;
bool handover_issued;
struct completion start_done;
struct completion stop_done;
int crash_reason;
bool running;
void (*handover)(struct qcom_q6v5 *q6v5);
};
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 qcom_q6v5_prepare(struct qcom_q6v5 *q6v5);
int qcom_q6v5_unprepare(struct qcom_q6v5 *q6v5);
int qcom_q6v5_request_stop(struct qcom_q6v5 *q6v5);
int qcom_q6v5_wait_for_start(struct qcom_q6v5 *q6v5, int timeout);
#endif
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