Commit | Line | Data |
---|---|---|
b482cd20 SB |
1 | /* |
2 | * Copyright (C) ST-Ericsson AB 2010 | |
26ee65e6 | 3 | * Author: Sjur Brendeland |
b482cd20 SB |
4 | * License terms: GNU General Public License (GPL) version 2 |
5 | */ | |
6 | ||
b31fa5ba JP |
7 | #define pr_fmt(fmt) KBUILD_MODNAME ":%s(): " fmt, __func__ |
8 | ||
b482cd20 SB |
9 | #include <linux/kernel.h> |
10 | #include <linux/types.h> | |
11 | #include <linux/errno.h> | |
12 | #include <linux/slab.h> | |
43e36921 | 13 | #include <linux/module.h> |
44764812 | 14 | #include <linux/pkt_sched.h> |
b482cd20 SB |
15 | #include <net/caif/caif_layer.h> |
16 | #include <net/caif/cfsrvl.h> | |
17 | #include <net/caif/cfpkt.h> | |
18 | ||
19 | #define SRVL_CTRL_PKT_SIZE 1 | |
20 | #define SRVL_FLOW_OFF 0x81 | |
21 | #define SRVL_FLOW_ON 0x80 | |
22 | #define SRVL_SET_PIN 0x82 | |
23 | #define SRVL_CTRL_PKT_SIZE 1 | |
24 | ||
25 | #define container_obj(layr) container_of(layr, struct cfsrvl, layer) | |
26 | ||
27 | static void cfservl_ctrlcmd(struct cflayer *layr, enum caif_ctrlcmd ctrl, | |
3bffc475 | 28 | int phyid) |
b482cd20 SB |
29 | { |
30 | struct cfsrvl *service = container_obj(layr); | |
b1c74247 | 31 | |
43e36921 | 32 | if (layr->up == NULL || layr->up->ctrlcmd == NULL) |
33 | return; | |
b1c74247 | 34 | |
b482cd20 SB |
35 | switch (ctrl) { |
36 | case CAIF_CTRLCMD_INIT_RSP: | |
37 | service->open = true; | |
38 | layr->up->ctrlcmd(layr->up, ctrl, phyid); | |
39 | break; | |
40 | case CAIF_CTRLCMD_DEINIT_RSP: | |
41 | case CAIF_CTRLCMD_INIT_FAIL_RSP: | |
42 | service->open = false; | |
43 | layr->up->ctrlcmd(layr->up, ctrl, phyid); | |
44 | break; | |
45 | case _CAIF_CTRLCMD_PHYIF_FLOW_OFF_IND: | |
46 | if (phyid != service->dev_info.id) | |
47 | break; | |
48 | if (service->modem_flow_on) | |
49 | layr->up->ctrlcmd(layr->up, | |
50 | CAIF_CTRLCMD_FLOW_OFF_IND, phyid); | |
51 | service->phy_flow_on = false; | |
52 | break; | |
53 | case _CAIF_CTRLCMD_PHYIF_FLOW_ON_IND: | |
54 | if (phyid != service->dev_info.id) | |
55 | return; | |
56 | if (service->modem_flow_on) { | |
57 | layr->up->ctrlcmd(layr->up, | |
58 | CAIF_CTRLCMD_FLOW_ON_IND, | |
59 | phyid); | |
60 | } | |
61 | service->phy_flow_on = true; | |
62 | break; | |
63 | case CAIF_CTRLCMD_FLOW_OFF_IND: | |
64 | if (service->phy_flow_on) { | |
65 | layr->up->ctrlcmd(layr->up, | |
66 | CAIF_CTRLCMD_FLOW_OFF_IND, phyid); | |
67 | } | |
68 | service->modem_flow_on = false; | |
69 | break; | |
70 | case CAIF_CTRLCMD_FLOW_ON_IND: | |
71 | if (service->phy_flow_on) { | |
72 | layr->up->ctrlcmd(layr->up, | |
73 | CAIF_CTRLCMD_FLOW_ON_IND, phyid); | |
74 | } | |
75 | service->modem_flow_on = true; | |
76 | break; | |
77 | case _CAIF_CTRLCMD_PHYIF_DOWN_IND: | |
78 | /* In case interface is down, let's fake a remove shutdown */ | |
79 | layr->up->ctrlcmd(layr->up, | |
80 | CAIF_CTRLCMD_REMOTE_SHUTDOWN_IND, phyid); | |
81 | break; | |
82 | case CAIF_CTRLCMD_REMOTE_SHUTDOWN_IND: | |
83 | layr->up->ctrlcmd(layr->up, ctrl, phyid); | |
84 | break; | |
85 | default: | |
b31fa5ba | 86 | pr_warn("Unexpected ctrl in cfsrvl (%d)\n", ctrl); |
b482cd20 SB |
87 | /* We have both modem and phy flow on, send flow on */ |
88 | layr->up->ctrlcmd(layr->up, ctrl, phyid); | |
89 | service->phy_flow_on = true; | |
90 | break; | |
91 | } | |
92 | } | |
93 | ||
94 | static int cfservl_modemcmd(struct cflayer *layr, enum caif_modemcmd ctrl) | |
95 | { | |
96 | struct cfsrvl *service = container_obj(layr); | |
b1c74247 | 97 | |
b482cd20 SB |
98 | caif_assert(layr != NULL); |
99 | caif_assert(layr->dn != NULL); | |
100 | caif_assert(layr->dn->transmit != NULL); | |
b1c74247 SB |
101 | |
102 | if (!service->supports_flowctrl) | |
103 | return 0; | |
104 | ||
b482cd20 SB |
105 | switch (ctrl) { |
106 | case CAIF_MODEMCMD_FLOW_ON_REQ: | |
107 | { | |
108 | struct cfpkt *pkt; | |
109 | struct caif_payload_info *info; | |
110 | u8 flow_on = SRVL_FLOW_ON; | |
111 | pkt = cfpkt_create(SRVL_CTRL_PKT_SIZE); | |
7ac2ed0c | 112 | if (!pkt) |
b482cd20 | 113 | return -ENOMEM; |
b482cd20 SB |
114 | |
115 | if (cfpkt_add_head(pkt, &flow_on, 1) < 0) { | |
b31fa5ba | 116 | pr_err("Packet is erroneous!\n"); |
b482cd20 SB |
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; | |
44764812 | 124 | cfpkt_set_prio(pkt, TC_PRIO_CONTROL); |
b482cd20 SB |
125 | return layr->dn->transmit(layr->dn, pkt); |
126 | } | |
127 | case CAIF_MODEMCMD_FLOW_OFF_REQ: | |
128 | { | |
129 | struct cfpkt *pkt; | |
130 | struct caif_payload_info *info; | |
131 | u8 flow_off = SRVL_FLOW_OFF; | |
132 | pkt = cfpkt_create(SRVL_CTRL_PKT_SIZE); | |
7ac2ed0c | 133 | if (!pkt) |
638e628a | 134 | return -ENOMEM; |
638e628a | 135 | |
b482cd20 | 136 | if (cfpkt_add_head(pkt, &flow_off, 1) < 0) { |
b31fa5ba | 137 | pr_err("Packet is erroneous!\n"); |
b482cd20 SB |
138 | cfpkt_destroy(pkt); |
139 | return -EPROTO; | |
140 | } | |
141 | info = cfpkt_info(pkt); | |
142 | info->channel_id = service->layer.id; | |
143 | info->hdr_len = 1; | |
144 | info->dev_info = &service->dev_info; | |
44764812 | 145 | cfpkt_set_prio(pkt, TC_PRIO_CONTROL); |
b482cd20 SB |
146 | return layr->dn->transmit(layr->dn, pkt); |
147 | } | |
148 | default: | |
149 | break; | |
150 | } | |
151 | return -EINVAL; | |
152 | } | |
153 | ||
43e36921 | 154 | static void cfsrvl_release(struct cflayer *layer) |
a7da1f55 | 155 | { |
43e36921 | 156 | struct cfsrvl *service = container_of(layer, struct cfsrvl, layer); |
a7da1f55 SB |
157 | kfree(service); |
158 | } | |
159 | ||
b482cd20 | 160 | void cfsrvl_init(struct cfsrvl *service, |
3bffc475 SMP |
161 | u8 channel_id, |
162 | struct dev_info *dev_info, | |
163 | bool supports_flowctrl) | |
b482cd20 SB |
164 | { |
165 | caif_assert(offsetof(struct cfsrvl, layer) == 0); | |
166 | service->open = false; | |
167 | service->modem_flow_on = true; | |
168 | service->phy_flow_on = true; | |
169 | service->layer.id = channel_id; | |
170 | service->layer.ctrlcmd = cfservl_ctrlcmd; | |
171 | service->layer.modemcmd = cfservl_modemcmd; | |
172 | service->dev_info = *dev_info; | |
b1c74247 | 173 | service->supports_flowctrl = supports_flowctrl; |
a7da1f55 | 174 | service->release = cfsrvl_release; |
5b208656 SB |
175 | } |
176 | ||
b482cd20 SB |
177 | bool cfsrvl_ready(struct cfsrvl *service, int *err) |
178 | { | |
b482cd20 SB |
179 | if (!service->open) { |
180 | *err = -ENOTCONN; | |
181 | return false; | |
182 | } | |
374458b3 | 183 | return true; |
b482cd20 | 184 | } |
43e36921 | 185 | |
b482cd20 SB |
186 | u8 cfsrvl_getphyid(struct cflayer *layer) |
187 | { | |
188 | struct cfsrvl *servl = container_obj(layer); | |
189 | return servl->dev_info.id; | |
190 | } | |
191 | ||
192 | bool cfsrvl_phyid_match(struct cflayer *layer, int phyid) | |
193 | { | |
194 | struct cfsrvl *servl = container_obj(layer); | |
195 | return servl->dev_info.id == phyid; | |
196 | } | |
43e36921 | 197 | |
198 | void caif_free_client(struct cflayer *adap_layer) | |
199 | { | |
200 | struct cfsrvl *servl; | |
201 | if (adap_layer == NULL || adap_layer->dn == NULL) | |
202 | return; | |
203 | servl = container_obj(adap_layer->dn); | |
204 | servl->release(&servl->layer); | |
205 | } | |
206 | EXPORT_SYMBOL(caif_free_client); | |
207 | ||
208 | void caif_client_register_refcnt(struct cflayer *adapt_layer, | |
3bffc475 SMP |
209 | void (*hold)(struct cflayer *lyr), |
210 | void (*put)(struct cflayer *lyr)) | |
43e36921 | 211 | { |
212 | struct cfsrvl *service; | |
43e36921 | 213 | |
566f26aa WY |
214 | if (WARN_ON(adapt_layer == NULL || adapt_layer->dn == NULL)) |
215 | return; | |
216 | service = container_of(adapt_layer->dn, struct cfsrvl, layer); | |
43e36921 | 217 | service->hold = hold; |
218 | service->put = put; | |
219 | } | |
220 | EXPORT_SYMBOL(caif_client_register_refcnt); |