1 // SPDX-License-Identifier: GPL-2.0
3 * Copyright 2020-2021 NXP
6 #include <linux/init.h>
7 #include <linux/interconnect.h>
8 #include <linux/ioctl.h>
9 #include <linux/list.h>
10 #include <linux/kernel.h>
11 #include <linux/module.h>
12 #include <linux/platform_device.h>
17 static void vpu_mbox_rx_callback(struct mbox_client *cl, void *msg)
19 struct vpu_mbox *rx = container_of(cl, struct vpu_mbox, cl);
20 struct vpu_core *core = container_of(rx, struct vpu_core, rx);
22 vpu_isr(core, *(u32 *)msg);
25 static int vpu_mbox_request_channel(struct device *dev, struct vpu_mbox *mbox)
28 struct mbox_client *cl;
43 cl->knows_txdone = false;
44 cl->rx_callback = vpu_mbox_rx_callback;
46 ch = mbox_request_channel_byname(cl, mbox->name);
48 return dev_err_probe(dev, PTR_ERR(ch),
49 "Failed to request mbox chan %s\n",
56 int vpu_mbox_init(struct vpu_core *core)
58 scnprintf(core->tx_type.name, sizeof(core->tx_type.name) - 1, "tx0");
59 core->tx_type.block = true;
61 scnprintf(core->tx_data.name, sizeof(core->tx_data.name) - 1, "tx1");
62 core->tx_data.block = false;
64 scnprintf(core->rx.name, sizeof(core->rx.name) - 1, "rx");
65 core->rx.block = true;
70 int vpu_mbox_request(struct vpu_core *core)
74 ret = vpu_mbox_request_channel(core->dev, &core->tx_type);
77 ret = vpu_mbox_request_channel(core->dev, &core->tx_data);
80 ret = vpu_mbox_request_channel(core->dev, &core->rx);
84 dev_dbg(core->dev, "%s request mbox\n", vpu_core_type_desc(core->type));
91 void vpu_mbox_free(struct vpu_core *core)
93 mbox_free_channel(core->tx_type.ch);
94 mbox_free_channel(core->tx_data.ch);
95 mbox_free_channel(core->rx.ch);
96 core->tx_type.ch = NULL;
97 core->tx_data.ch = NULL;
99 dev_dbg(core->dev, "%s free mbox\n", vpu_core_type_desc(core->type));
102 void vpu_mbox_send_type(struct vpu_core *core, u32 type)
104 mbox_send_message(core->tx_type.ch, &type);
107 void vpu_mbox_send_msg(struct vpu_core *core, u32 type, u32 data)
109 mbox_send_message(core->tx_data.ch, &data);
110 mbox_send_message(core->tx_type.ch, &type);
113 void vpu_mbox_enable_rx(struct vpu_dev *dev)