Net: caif: Makefile: Remove deprecated items
[linux-2.6.git] / net / caif / cfsrvl.c
1 /*
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
5  */
6
7 #define pr_fmt(fmt) KBUILD_MODNAME ":%s(): " fmt, __func__
8
9 #include <linux/kernel.h>
10 #include <linux/types.h>
11 #include <linux/errno.h>
12 #include <linux/slab.h>
13 #include <net/caif/caif_layer.h>
14 #include <net/caif/cfsrvl.h>
15 #include <net/caif/cfpkt.h>
16
17 #define SRVL_CTRL_PKT_SIZE 1
18 #define SRVL_FLOW_OFF 0x81
19 #define SRVL_FLOW_ON  0x80
20 #define SRVL_SET_PIN  0x82
21 #define SRVL_CTRL_PKT_SIZE 1
22
23 #define container_obj(layr) container_of(layr, struct cfsrvl, layer)
24
25 static void cfservl_ctrlcmd(struct cflayer *layr, enum caif_ctrlcmd ctrl,
26                                 int phyid)
27 {
28         struct cfsrvl *service = container_obj(layr);
29
30         caif_assert(layr->up != NULL);
31         caif_assert(layr->up->ctrlcmd != NULL);
32
33         switch (ctrl) {
34         case CAIF_CTRLCMD_INIT_RSP:
35                 service->open = true;
36                 layr->up->ctrlcmd(layr->up, ctrl, phyid);
37                 break;
38         case CAIF_CTRLCMD_DEINIT_RSP:
39         case CAIF_CTRLCMD_INIT_FAIL_RSP:
40                 service->open = false;
41                 layr->up->ctrlcmd(layr->up, ctrl, phyid);
42                 break;
43         case _CAIF_CTRLCMD_PHYIF_FLOW_OFF_IND:
44                 if (phyid != service->dev_info.id)
45                         break;
46                 if (service->modem_flow_on)
47                         layr->up->ctrlcmd(layr->up,
48                                           CAIF_CTRLCMD_FLOW_OFF_IND, phyid);
49                 service->phy_flow_on = false;
50                 break;
51         case _CAIF_CTRLCMD_PHYIF_FLOW_ON_IND:
52                 if (phyid != service->dev_info.id)
53                         return;
54                 if (service->modem_flow_on) {
55                         layr->up->ctrlcmd(layr->up,
56                                            CAIF_CTRLCMD_FLOW_ON_IND,
57                                            phyid);
58                 }
59                 service->phy_flow_on = true;
60                 break;
61         case CAIF_CTRLCMD_FLOW_OFF_IND:
62                 if (service->phy_flow_on) {
63                         layr->up->ctrlcmd(layr->up,
64                                           CAIF_CTRLCMD_FLOW_OFF_IND, phyid);
65                 }
66                 service->modem_flow_on = false;
67                 break;
68         case CAIF_CTRLCMD_FLOW_ON_IND:
69                 if (service->phy_flow_on) {
70                         layr->up->ctrlcmd(layr->up,
71                                           CAIF_CTRLCMD_FLOW_ON_IND, phyid);
72                 }
73                 service->modem_flow_on = true;
74                 break;
75         case _CAIF_CTRLCMD_PHYIF_DOWN_IND:
76                 /* In case interface is down, let's fake a remove shutdown */
77                 layr->up->ctrlcmd(layr->up,
78                                 CAIF_CTRLCMD_REMOTE_SHUTDOWN_IND, phyid);
79                 break;
80         case CAIF_CTRLCMD_REMOTE_SHUTDOWN_IND:
81                 layr->up->ctrlcmd(layr->up, ctrl, phyid);
82                 break;
83         default:
84                 pr_warn("Unexpected ctrl in cfsrvl (%d)\n", ctrl);
85                 /* We have both modem and phy flow on, send flow on */
86                 layr->up->ctrlcmd(layr->up, ctrl, phyid);
87                 service->phy_flow_on = true;
88                 break;
89         }
90 }
91
92 static int cfservl_modemcmd(struct cflayer *layr, enum caif_modemcmd ctrl)
93 {
94         struct cfsrvl *service = container_obj(layr);
95
96         caif_assert(layr != NULL);
97         caif_assert(layr->dn != NULL);
98         caif_assert(layr->dn->transmit != NULL);
99
100         if (!service->supports_flowctrl)
101                 return 0;
102
103         switch (ctrl) {
104         case CAIF_MODEMCMD_FLOW_ON_REQ:
105                 {
106                         struct cfpkt *pkt;
107                         struct caif_payload_info *info;
108                         u8 flow_on = SRVL_FLOW_ON;
109                         pkt = cfpkt_create(SRVL_CTRL_PKT_SIZE);
110                         if (!pkt) {
111                                 pr_warn("Out of memory\n");
112                                 return -ENOMEM;
113                         }
114
115                         if (cfpkt_add_head(pkt, &flow_on, 1) < 0) {
116                                 pr_err("Packet is erroneous!\n");
117                                 cfpkt_destroy(pkt);
118                                 return -EPROTO;
119                         }
120                         info = cfpkt_info(pkt);
121                         info->channel_id = service->layer.id;
122                         info->hdr_len = 1;
123                         info->dev_info = &service->dev_info;
124                         return layr->dn->transmit(layr->dn, pkt);
125                 }
126         case CAIF_MODEMCMD_FLOW_OFF_REQ:
127                 {
128                         struct cfpkt *pkt;
129                         struct caif_payload_info *info;
130                         u8 flow_off = SRVL_FLOW_OFF;
131                         pkt = cfpkt_create(SRVL_CTRL_PKT_SIZE);
132                         if (!pkt) {
133                                 pr_warn("Out of memory\n");
134                                 return -ENOMEM;
135                         }
136
137                         if (cfpkt_add_head(pkt, &flow_off, 1) < 0) {
138                                 pr_err("Packet is erroneous!\n");
139                                 cfpkt_destroy(pkt);
140                                 return -EPROTO;
141                         }
142                         info = cfpkt_info(pkt);
143                         info->channel_id = service->layer.id;
144                         info->hdr_len = 1;
145                         info->dev_info = &service->dev_info;
146                         return layr->dn->transmit(layr->dn, pkt);
147                 }
148         default:
149           break;
150         }
151         return -EINVAL;
152 }
153
154 void cfservl_destroy(struct cflayer *layer)
155 {
156         kfree(layer);
157 }
158
159 void cfsrvl_release(struct kref *kref)
160 {
161         struct cfsrvl *service = container_of(kref, struct cfsrvl, ref);
162         kfree(service);
163 }
164
165 void cfsrvl_init(struct cfsrvl *service,
166                         u8 channel_id,
167                         struct dev_info *dev_info,
168                         bool supports_flowctrl
169                         )
170 {
171         caif_assert(offsetof(struct cfsrvl, layer) == 0);
172         service->open = false;
173         service->modem_flow_on = true;
174         service->phy_flow_on = true;
175         service->layer.id = channel_id;
176         service->layer.ctrlcmd = cfservl_ctrlcmd;
177         service->layer.modemcmd = cfservl_modemcmd;
178         service->dev_info = *dev_info;
179         service->supports_flowctrl = supports_flowctrl;
180         service->release = cfsrvl_release;
181         kref_init(&service->ref);
182 }
183
184
185 bool cfsrvl_ready(struct cfsrvl *service, int *err)
186 {
187         if (service->open && service->modem_flow_on && service->phy_flow_on)
188                 return true;
189         if (!service->open) {
190                 *err = -ENOTCONN;
191                 return false;
192         }
193         caif_assert(!(service->modem_flow_on && service->phy_flow_on));
194         *err = -EAGAIN;
195         return false;
196 }
197 u8 cfsrvl_getphyid(struct cflayer *layer)
198 {
199         struct cfsrvl *servl = container_obj(layer);
200         return servl->dev_info.id;
201 }
202
203 bool cfsrvl_phyid_match(struct cflayer *layer, int phyid)
204 {
205         struct cfsrvl *servl = container_obj(layer);
206         return servl->dev_info.id == phyid;
207 }