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 */
11 static 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 */
26 static 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_cdev_close(ipc_port);
31 }
32 
33 /* transfer control data to modem */
34 static 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 
41 static 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 */
48 struct 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, ipc_port);
67 
68 	return ipc_port;
69 }
70 
71 /* Port deinit func */
72 void ipc_port_deinit(struct iosm_cdev *port[])
73 {
74 	struct iosm_cdev *ipc_port;
75 	u8 ctrl_chl_nr;
76 
77 	for (ctrl_chl_nr = 0; ctrl_chl_nr < IPC_MEM_MAX_CHANNELS;
78 	     ctrl_chl_nr++) {
79 		if (port[ctrl_chl_nr]) {
80 			ipc_port = port[ctrl_chl_nr];
81 			wwan_remove_port(ipc_port->iosm_port);
82 			kfree(ipc_port);
83 		}
84 	}
85 }
86