mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-07-16 16:16:16 +09:00
66e7348fe7
This header is necessary for the dev_xxx macros. Signed-off-by: Sean Anderson <seanga2@gmail.com> Reviewed-by: Simon Glass <sjg@chromium.org>
104 lines
2.1 KiB
C
104 lines
2.1 KiB
C
// SPDX-License-Identifier: GPL-2.0+
|
|
/*
|
|
* Copyright (C) 2020 Linaro Limited.
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <dm.h>
|
|
#include <dm/device_compat.h>
|
|
#include <errno.h>
|
|
#include <mailbox.h>
|
|
#include <scmi_agent.h>
|
|
#include <scmi_agent-uclass.h>
|
|
#include <dm/devres.h>
|
|
#include <linux/compat.h>
|
|
|
|
#include "smt.h"
|
|
|
|
#define TIMEOUT_US_10MS 10000
|
|
|
|
/**
|
|
* struct scmi_mbox_channel - Description of an SCMI mailbox transport
|
|
* @smt: Shared memory buffer
|
|
* @mbox: Mailbox channel description
|
|
* @timeout_us: Timeout in microseconds for the mailbox transfer
|
|
*/
|
|
struct scmi_mbox_channel {
|
|
struct scmi_smt smt;
|
|
struct mbox_chan mbox;
|
|
ulong timeout_us;
|
|
};
|
|
|
|
static int scmi_mbox_process_msg(struct udevice *dev, struct scmi_msg *msg)
|
|
{
|
|
struct scmi_mbox_channel *chan = dev_get_priv(dev);
|
|
int ret;
|
|
|
|
ret = scmi_write_msg_to_smt(dev, &chan->smt, msg);
|
|
if (ret)
|
|
return ret;
|
|
|
|
/* Give shm addr to mbox in case it is meaningful */
|
|
ret = mbox_send(&chan->mbox, chan->smt.buf);
|
|
if (ret) {
|
|
dev_err(dev, "Message send failed: %d\n", ret);
|
|
goto out;
|
|
}
|
|
|
|
/* Receive the response */
|
|
ret = mbox_recv(&chan->mbox, chan->smt.buf, chan->timeout_us);
|
|
if (ret) {
|
|
dev_err(dev, "Response failed: %d, abort\n", ret);
|
|
goto out;
|
|
}
|
|
|
|
ret = scmi_read_resp_from_smt(dev, &chan->smt, msg);
|
|
|
|
out:
|
|
scmi_clear_smt_channel(&chan->smt);
|
|
|
|
return ret;
|
|
}
|
|
|
|
int scmi_mbox_probe(struct udevice *dev)
|
|
{
|
|
struct scmi_mbox_channel *chan = dev_get_priv(dev);
|
|
int ret;
|
|
|
|
chan->timeout_us = TIMEOUT_US_10MS;
|
|
|
|
ret = mbox_get_by_index(dev, 0, &chan->mbox);
|
|
if (ret) {
|
|
dev_err(dev, "Failed to find mailbox: %d\n", ret);
|
|
goto out;
|
|
}
|
|
|
|
ret = scmi_dt_get_smt_buffer(dev, &chan->smt);
|
|
if (ret)
|
|
dev_err(dev, "Failed to get shm resources: %d\n", ret);
|
|
|
|
out:
|
|
if (ret)
|
|
devm_kfree(dev, chan);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static const struct udevice_id scmi_mbox_ids[] = {
|
|
{ .compatible = "arm,scmi" },
|
|
{ }
|
|
};
|
|
|
|
static const struct scmi_agent_ops scmi_mbox_ops = {
|
|
.process_msg = scmi_mbox_process_msg,
|
|
};
|
|
|
|
U_BOOT_DRIVER(scmi_mbox) = {
|
|
.name = "scmi-over-mailbox",
|
|
.id = UCLASS_SCMI_AGENT,
|
|
.of_match = scmi_mbox_ids,
|
|
.priv_auto_alloc_size = sizeof(struct scmi_mbox_channel),
|
|
.probe = scmi_mbox_probe,
|
|
.ops = &scmi_mbox_ops,
|
|
};
|