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/*
* Copyright (c) 2006-2022, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2022-11-26 GuEe-GUI first version
*/
#include <rthw.h>
#include <drivers/mailbox.h>
#include <dt-bindings/size.h>
#define DBG_TAG "scmi.agent.mailbox"
#define DBG_LVL DBG_INFO
#include <rtdbg.h>
#include "agent.h"
struct scmi_agent_mailbox
{
struct rt_mbox_client mbox_client;
struct rt_mbox_chan *chan;
struct scmi_shared_mem *shmem;
struct rt_spinlock lock;
};
#define raw_to_scmi_mailbox(raw) rt_container_of(raw, struct scmi_agent_mailbox, mbox_client)
static void scmi_mailbox_rx_callback(struct rt_mbox_client *client, void *data)
{
struct rt_scmi_msg *msg = data;
if (msg->rx_callback)
{
msg->rx_callback(msg->sdev, msg->out_msg, msg->out_msg_size);
}
}
static void scmi_mailbox_tx_prepare(struct rt_mbox_client *client, const void *data)
{
struct rt_scmi_msg *msg = (void *)data;
struct scmi_agent_mailbox *ambox = raw_to_scmi_mailbox(client);
scmi_shmem_msg_write(ambox->shmem, msg);
}
static void scmi_mailbox_tx_done(struct rt_mbox_client *client, const void *data,
rt_err_t err)
{
struct scmi_agent_mailbox *ambox = raw_to_scmi_mailbox(client);
if (!err)
{
scmi_shmem_clear_channel(ambox->shmem);
}
}
static rt_err_t scmi_agent_mailbox_setup(struct scmi_agent *agent,
struct rt_device *dev)
{
rt_err_t err;
rt_uint64_t shm_addr, shm_size;
int mbox_chan, mbox_count, shmem_count;
struct rt_ofw_node *np = dev->ofw_node, *shmem_np;
struct scmi_agent_mailbox *ambox = rt_calloc(1, sizeof(*ambox));
if (!ambox)
{
return -RT_ENOMEM;
}
mbox_count = rt_ofw_count_phandle_cells(np, "mboxes", "#mbox-cells");
shmem_count = rt_ofw_count_phandle_cells(np, "shmem", RT_NULL);
if (mbox_count < 0)
{
err = mbox_count;
goto _fail;
}
if (shmem_count < 0)
{
err = shmem_count;
goto _fail;
}
mbox_chan = 0;
if (mbox_count == 2 && shmem_count == 2)
{
mbox_chan = 1;
}
else if (mbox_count == 3)
{
mbox_chan = 2;
}
ambox->mbox_client.dev = dev;
ambox->mbox_client.rx_callback = scmi_mailbox_rx_callback;
ambox->mbox_client.tx_prepare = scmi_mailbox_tx_prepare;
ambox->mbox_client.tx_done = scmi_mailbox_tx_done;
ambox->chan = rt_mbox_request_by_index(&ambox->mbox_client, mbox_chan);
if (rt_is_err_or_null(ambox->chan))
{
err = -RT_EIO;
goto _fail;
}
shmem_np = rt_ofw_parse_phandle(np, "shmem", 0);
if (!rt_ofw_node_is_compatible(shmem_np, "arm,scmi-shmem"))
{
err = -RT_EINVAL;
rt_ofw_node_put(shmem_np);
goto _fail;
}
if ((err = rt_ofw_get_address(shmem_np, 0, &shm_addr, &shm_size)))
{
rt_ofw_node_put(shmem_np);
goto _fail;
}
rt_ofw_node_put(shmem_np);
ambox->shmem = rt_ioremap((void *)shm_addr, shm_size);
if (!ambox->shmem)
{
err = -RT_EIO;
goto _fail;
}
agent->priv = ambox;
return RT_EOK;
_fail:
if (!rt_is_err_or_null(ambox->chan))
{
rt_mbox_release(ambox->chan);
}
if (ambox->shmem)
{
rt_iounmap(ambox->shmem);
}
rt_free(ambox);
return err;
}
static rt_err_t scmi_agent_mailbox_process_msg(struct scmi_agent *agent,
struct rt_scmi_msg *msg)
{
rt_err_t err;
struct scmi_agent_mailbox *ambox = agent->priv;
rt_hw_spin_lock(&ambox->lock.lock);
err = rt_mbox_send(ambox->chan, (const void *)msg, 30);
rt_hw_spin_unlock(&ambox->lock.lock);
return err;
}
struct scmi_agent_ops scmi_agent_mailbox_ops =
{
.name = "mailbox",
.setup = scmi_agent_mailbox_setup,
.process_msg = scmi_agent_mailbox_process_msg,
};
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