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 */
ipc_port_ctrl_start(struct wwan_port * port)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 */
ipc_port_ctrl_stop(struct wwan_port * port)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_port_close(ipc_port->ipc_imem, ipc_port->channel);
31 }
32
33 /* transfer control data to modem */
ipc_port_ctrl_tx(struct wwan_port * port,struct sk_buff * skb)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 */
ipc_port_init(struct iosm_imem * ipc_imem,struct ipc_chnl_cfg ipc_port_cfg)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, NULL,
67 ipc_port);
68
69 return ipc_port;
70 }
71
72 /* Port deinit func */
ipc_port_deinit(struct iosm_cdev * port[])73 void 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