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/of_device.h>
13 #include <linux/of_address.h>
14 #include <linux/platform_device.h>
19 static void vpu_mbox_rx_callback(struct mbox_client *cl, void *msg)
21 struct vpu_mbox *rx = container_of(cl, struct vpu_mbox, cl);
22 struct vpu_core *core = container_of(rx, struct vpu_core, rx);
24 vpu_isr(core, *(u32 *)msg);
27 static int vpu_mbox_request_channel(struct device *dev, struct vpu_mbox *mbox)
30 struct mbox_client *cl;
45 cl->knows_txdone = false;
46 cl->rx_callback = vpu_mbox_rx_callback;
48 ch = mbox_request_channel_byname(cl, mbox->name);
50 return dev_err_probe(dev, PTR_ERR(ch),
51 "Failed to request mbox chan %s\n",
58 int vpu_mbox_init(struct vpu_core *core)
60 scnprintf(core->tx_type.name, sizeof(core->tx_type.name) - 1, "tx0");
61 core->tx_type.block = true;
63 scnprintf(core->tx_data.name, sizeof(core->tx_data.name) - 1, "tx1");
64 core->tx_data.block = false;
66 scnprintf(core->rx.name, sizeof(core->rx.name) - 1, "rx");
67 core->rx.block = true;
72 int vpu_mbox_request(struct vpu_core *core)
76 ret = vpu_mbox_request_channel(core->dev, &core->tx_type);
79 ret = vpu_mbox_request_channel(core->dev, &core->tx_data);
82 ret = vpu_mbox_request_channel(core->dev, &core->rx);
86 dev_dbg(core->dev, "%s request mbox\n", vpu_core_type_desc(core->type));
93 void vpu_mbox_free(struct vpu_core *core)
95 mbox_free_channel(core->tx_type.ch);
96 mbox_free_channel(core->tx_data.ch);
97 mbox_free_channel(core->rx.ch);
98 core->tx_type.ch = NULL;
99 core->tx_data.ch = NULL;
101 dev_dbg(core->dev, "%s free mbox\n", vpu_core_type_desc(core->type));
104 void vpu_mbox_send_type(struct vpu_core *core, u32 type)
106 mbox_send_message(core->tx_type.ch, &type);
109 void vpu_mbox_send_msg(struct vpu_core *core, u32 type, u32 data)
111 mbox_send_message(core->tx_data.ch, &data);
112 mbox_send_message(core->tx_type.ch, &type);
115 void vpu_mbox_enable_rx(struct vpu_dev *dev)