2 * Copyright (C) ST-Ericsson AB 2010
3 * Author: Sjur Brendeland/sjur.brandeland@stericsson.com
4 * License terms: GNU General Public License (GPL) version 2
7 #define pr_fmt(fmt) KBUILD_MODNAME ":%s(): " fmt, __func__
9 #include <linux/kernel.h>
10 #include <linux/types.h>
11 #include <linux/errno.h>
12 #include <linux/slab.h>
13 #include <linux/module.h>
14 #include <net/caif/caif_layer.h>
15 #include <net/caif/cfsrvl.h>
16 #include <net/caif/cfpkt.h>
18 #define SRVL_CTRL_PKT_SIZE 1
19 #define SRVL_FLOW_OFF 0x81
20 #define SRVL_FLOW_ON 0x80
21 #define SRVL_SET_PIN 0x82
22 #define SRVL_CTRL_PKT_SIZE 1
24 #define container_obj(layr) container_of(layr, struct cfsrvl, layer)
26 static void cfservl_ctrlcmd(struct cflayer *layr, enum caif_ctrlcmd ctrl,
29 struct cfsrvl *service = container_obj(layr);
31 if (layr->up == NULL || layr->up->ctrlcmd == NULL)
35 case CAIF_CTRLCMD_INIT_RSP:
37 layr->up->ctrlcmd(layr->up, ctrl, phyid);
39 case CAIF_CTRLCMD_DEINIT_RSP:
40 case CAIF_CTRLCMD_INIT_FAIL_RSP:
41 service->open = false;
42 layr->up->ctrlcmd(layr->up, ctrl, phyid);
44 case _CAIF_CTRLCMD_PHYIF_FLOW_OFF_IND:
45 if (phyid != service->dev_info.id)
47 if (service->modem_flow_on)
48 layr->up->ctrlcmd(layr->up,
49 CAIF_CTRLCMD_FLOW_OFF_IND, phyid);
50 service->phy_flow_on = false;
52 case _CAIF_CTRLCMD_PHYIF_FLOW_ON_IND:
53 if (phyid != service->dev_info.id)
55 if (service->modem_flow_on) {
56 layr->up->ctrlcmd(layr->up,
57 CAIF_CTRLCMD_FLOW_ON_IND,
60 service->phy_flow_on = true;
62 case CAIF_CTRLCMD_FLOW_OFF_IND:
63 if (service->phy_flow_on) {
64 layr->up->ctrlcmd(layr->up,
65 CAIF_CTRLCMD_FLOW_OFF_IND, phyid);
67 service->modem_flow_on = false;
69 case CAIF_CTRLCMD_FLOW_ON_IND:
70 if (service->phy_flow_on) {
71 layr->up->ctrlcmd(layr->up,
72 CAIF_CTRLCMD_FLOW_ON_IND, phyid);
74 service->modem_flow_on = true;
76 case _CAIF_CTRLCMD_PHYIF_DOWN_IND:
77 /* In case interface is down, let's fake a remove shutdown */
78 layr->up->ctrlcmd(layr->up,
79 CAIF_CTRLCMD_REMOTE_SHUTDOWN_IND, phyid);
81 case CAIF_CTRLCMD_REMOTE_SHUTDOWN_IND:
82 layr->up->ctrlcmd(layr->up, ctrl, phyid);
85 pr_warn("Unexpected ctrl in cfsrvl (%d)\n", ctrl);
86 /* We have both modem and phy flow on, send flow on */
87 layr->up->ctrlcmd(layr->up, ctrl, phyid);
88 service->phy_flow_on = true;
93 static int cfservl_modemcmd(struct cflayer *layr, enum caif_modemcmd ctrl)
95 struct cfsrvl *service = container_obj(layr);
97 caif_assert(layr != NULL);
98 caif_assert(layr->dn != NULL);
99 caif_assert(layr->dn->transmit != NULL);
101 if (!service->supports_flowctrl)
105 case CAIF_MODEMCMD_FLOW_ON_REQ:
108 struct caif_payload_info *info;
109 u8 flow_on = SRVL_FLOW_ON;
110 pkt = cfpkt_create(SRVL_CTRL_PKT_SIZE);
114 if (cfpkt_add_head(pkt, &flow_on, 1) < 0) {
115 pr_err("Packet is erroneous!\n");
119 info = cfpkt_info(pkt);
120 info->channel_id = service->layer.id;
122 info->dev_info = &service->dev_info;
123 return layr->dn->transmit(layr->dn, pkt);
125 case CAIF_MODEMCMD_FLOW_OFF_REQ:
128 struct caif_payload_info *info;
129 u8 flow_off = SRVL_FLOW_OFF;
130 pkt = cfpkt_create(SRVL_CTRL_PKT_SIZE);
134 if (cfpkt_add_head(pkt, &flow_off, 1) < 0) {
135 pr_err("Packet is erroneous!\n");
139 info = cfpkt_info(pkt);
140 info->channel_id = service->layer.id;
142 info->dev_info = &service->dev_info;
143 return layr->dn->transmit(layr->dn, pkt);
151 static void cfsrvl_release(struct cflayer *layer)
153 struct cfsrvl *service = container_of(layer, struct cfsrvl, layer);
157 void cfsrvl_init(struct cfsrvl *service,
159 struct dev_info *dev_info,
160 bool supports_flowctrl
163 caif_assert(offsetof(struct cfsrvl, layer) == 0);
164 service->open = false;
165 service->modem_flow_on = true;
166 service->phy_flow_on = true;
167 service->layer.id = channel_id;
168 service->layer.ctrlcmd = cfservl_ctrlcmd;
169 service->layer.modemcmd = cfservl_modemcmd;
170 service->dev_info = *dev_info;
171 service->supports_flowctrl = supports_flowctrl;
172 service->release = cfsrvl_release;
175 bool cfsrvl_ready(struct cfsrvl *service, int *err)
177 if (service->open && service->modem_flow_on && service->phy_flow_on)
179 if (!service->open) {
183 caif_assert(!(service->modem_flow_on && service->phy_flow_on));
188 u8 cfsrvl_getphyid(struct cflayer *layer)
190 struct cfsrvl *servl = container_obj(layer);
191 return servl->dev_info.id;
194 bool cfsrvl_phyid_match(struct cflayer *layer, int phyid)
196 struct cfsrvl *servl = container_obj(layer);
197 return servl->dev_info.id == phyid;
200 void caif_free_client(struct cflayer *adap_layer)
202 struct cfsrvl *servl;
203 if (adap_layer == NULL || adap_layer->dn == NULL)
205 servl = container_obj(adap_layer->dn);
206 servl->release(&servl->layer);
208 EXPORT_SYMBOL(caif_free_client);
210 void caif_client_register_refcnt(struct cflayer *adapt_layer,
211 void (*hold)(struct cflayer *lyr),
212 void (*put)(struct cflayer *lyr))
214 struct cfsrvl *service;
215 service = container_of(adapt_layer->dn, struct cfsrvl, layer);
217 WARN_ON(adapt_layer == NULL || adapt_layer->dn == NULL);
218 service->hold = hold;
221 EXPORT_SYMBOL(caif_client_register_refcnt);