1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Copyright (C) 2020-21 Intel Corporation.
4 */
5
6#include "iosm_ipc_chnl_cfg.h"
7#include "iosm_ipc_imem_ops.h"
8#include "iosm_ipc_port.h"
9
10/* open logical channel for control communication */
11static int ipc_port_ctrl_start(struct wwan_port *port)
12{
13	struct iosm_cdev *ipc_port = wwan_port_get_drvdata(port);
14	int ret = 0;
15
16	ipc_port->channel = ipc_imem_sys_port_open(ipc_port->ipc_imem,
17						   ipc_port->chl_id,
18						   IPC_HP_CDEV_OPEN);
19	if (!ipc_port->channel)
20		ret = -EIO;
21
22	return ret;
23}
24
25/* close logical channel */
26static void ipc_port_ctrl_stop(struct wwan_port *port)
27{
28	struct iosm_cdev *ipc_port = wwan_port_get_drvdata(port);
29
30	ipc_imem_sys_port_close(ipc_port->ipc_imem, ipc_port->channel);
31}
32
33/* transfer control data to modem */
34static int ipc_port_ctrl_tx(struct wwan_port *port, struct sk_buff *skb)
35{
36	struct iosm_cdev *ipc_port = wwan_port_get_drvdata(port);
37
38	return ipc_imem_sys_cdev_write(ipc_port, skb);
39}
40
41static const struct wwan_port_ops ipc_wwan_ctrl_ops = {
42	.start = ipc_port_ctrl_start,
43	.stop = ipc_port_ctrl_stop,
44	.tx = ipc_port_ctrl_tx,
45};
46
47/* Port init func */
48struct iosm_cdev *ipc_port_init(struct iosm_imem *ipc_imem,
49				struct ipc_chnl_cfg ipc_port_cfg)
50{
51	struct iosm_cdev *ipc_port = kzalloc(sizeof(*ipc_port), GFP_KERNEL);
52	enum wwan_port_type port_type = ipc_port_cfg.wwan_port_type;
53	enum ipc_channel_id chl_id = ipc_port_cfg.id;
54
55	if (!ipc_port)
56		return NULL;
57
58	ipc_port->dev = ipc_imem->dev;
59	ipc_port->pcie = ipc_imem->pcie;
60
61	ipc_port->port_type = port_type;
62	ipc_port->chl_id = chl_id;
63	ipc_port->ipc_imem = ipc_imem;
64
65	ipc_port->iosm_port = wwan_create_port(ipc_port->dev, port_type,
66					       &ipc_wwan_ctrl_ops, NULL,
67					       ipc_port);
68
69	return ipc_port;
70}
71
72/* Port deinit func */
73void ipc_port_deinit(struct iosm_cdev *port[])
74{
75	struct iosm_cdev *ipc_port;
76	u8 ctrl_chl_nr;
77
78	for (ctrl_chl_nr = 0; ctrl_chl_nr < IPC_MEM_MAX_CHANNELS;
79	     ctrl_chl_nr++) {
80		if (port[ctrl_chl_nr]) {
81			ipc_port = port[ctrl_chl_nr];
82			wwan_remove_port(ipc_port->iosm_port);
83			kfree(ipc_port);
84		}
85	}
86}
87