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
6 #include <linux/kernel.h>
7 #include <linux/stddef.h>
8 #include <linux/slab.h>
9 #include <linux/netdevice.h>
10 #include <net/caif/caif_layer.h>
11 #include <net/caif/cfpkt.h>
12 #include <net/caif/cfcnfg.h>
13 #include <net/caif/cfctrl.h>
14 #include <net/caif/cfmuxl.h>
15 #include <net/caif/cffrml.h>
16 #include <net/caif/cfserl.h>
17 #include <net/caif/cfsrvl.h>
19 #include <linux/module.h>
20 #include <asm/atomic.h>
22 #define MAX_PHY_LAYERS 7
23 #define PHY_NAME_LEN 20
25 #define container_obj(layr) container_of(layr, struct cfcnfg, layer)
26 #define RFM_FRAGMENT_SIZE 4030
28 /* Information about CAIF physical interfaces held by Config Module in order
29 * to manage physical interfaces
31 struct cfcnfg_phyinfo {
32 /* Pointer to the layer below the MUX (framing layer) */
33 struct cflayer *frm_layer;
34 /* Pointer to the lowest actual physical layer */
35 struct cflayer *phy_layer;
36 /* Unique identifier of the physical interface */
38 /* Preference of the physical in interface */
39 enum cfcnfg_phy_preference pref;
41 /* Reference count, number of channels using the device */
44 /* Information about the physical device */
45 struct dev_info dev_info;
50 /* Use Start of frame extension */
53 /* Use Start of frame checksum */
62 struct cfcnfg_phyinfo phy_layers[MAX_PHY_LAYERS];
65 static void cfcnfg_linkup_rsp(struct cflayer *layer, u8 channel_id,
66 enum cfctrl_srv serv, u8 phyid,
67 struct cflayer *adapt_layer);
68 static void cfcnfg_linkdestroy_rsp(struct cflayer *layer, u8 channel_id);
69 static void cfcnfg_reject_rsp(struct cflayer *layer, u8 channel_id,
70 struct cflayer *adapt_layer);
71 static void cfctrl_resp_func(void);
72 static void cfctrl_enum_resp(void);
74 struct cfcnfg *cfcnfg_create(void)
77 struct cfctrl_rsp *resp;
78 /* Initiate this layer */
79 this = kzalloc(sizeof(struct cfcnfg), GFP_ATOMIC);
81 pr_warning("CAIF: %s(): Out of memory\n", __func__);
84 this->mux = cfmuxl_create();
87 this->ctrl = cfctrl_create();
90 /* Initiate response functions */
91 resp = cfctrl_get_respfuncs(this->ctrl);
92 resp->enum_rsp = cfctrl_enum_resp;
93 resp->linkerror_ind = cfctrl_resp_func;
94 resp->linkdestroy_rsp = cfcnfg_linkdestroy_rsp;
95 resp->sleep_rsp = cfctrl_resp_func;
96 resp->wake_rsp = cfctrl_resp_func;
97 resp->restart_rsp = cfctrl_resp_func;
98 resp->radioset_rsp = cfctrl_resp_func;
99 resp->linksetup_rsp = cfcnfg_linkup_rsp;
100 resp->reject_rsp = cfcnfg_reject_rsp;
102 this->last_phyid = 1;
104 cfmuxl_set_uplayer(this->mux, this->ctrl, 0);
105 layer_set_dn(this->ctrl, this->mux);
106 layer_set_up(this->ctrl, this);
109 pr_warning("CAIF: %s(): Out of memory\n", __func__);
115 EXPORT_SYMBOL(cfcnfg_create);
117 void cfcnfg_remove(struct cfcnfg *cfg)
126 static void cfctrl_resp_func(void)
130 static void cfctrl_enum_resp(void)
134 struct dev_info *cfcnfg_get_phyid(struct cfcnfg *cnfg,
135 enum cfcnfg_phy_preference phy_pref)
139 /* Try to match with specified preference */
140 for (i = 1; i < MAX_PHY_LAYERS; i++) {
141 if (cnfg->phy_layers[i].id == i &&
142 cnfg->phy_layers[i].pref == phy_pref &&
143 cnfg->phy_layers[i].frm_layer != NULL) {
144 caif_assert(cnfg->phy_layers != NULL);
145 caif_assert(cnfg->phy_layers[i].id == i);
146 return &cnfg->phy_layers[i].dev_info;
149 /* Otherwise just return something */
150 for (i = 1; i < MAX_PHY_LAYERS; i++) {
151 if (cnfg->phy_layers[i].id == i) {
152 caif_assert(cnfg->phy_layers != NULL);
153 caif_assert(cnfg->phy_layers[i].id == i);
154 return &cnfg->phy_layers[i].dev_info;
161 static struct cfcnfg_phyinfo *cfcnfg_get_phyinfo(struct cfcnfg *cnfg,
165 /* Try to match with specified preference */
166 for (i = 0; i < MAX_PHY_LAYERS; i++)
167 if (cnfg->phy_layers[i].frm_layer != NULL &&
168 cnfg->phy_layers[i].id == phyid)
169 return &cnfg->phy_layers[i];
173 int cfcnfg_get_named(struct cfcnfg *cnfg, char *name)
177 /* Try to match with specified name */
178 for (i = 0; i < MAX_PHY_LAYERS; i++) {
179 if (cnfg->phy_layers[i].frm_layer != NULL
180 && strcmp(cnfg->phy_layers[i].phy_layer->name,
182 return cnfg->phy_layers[i].frm_layer->id;
187 int cfcnfg_disconn_adapt_layer(struct cfcnfg *cnfg, struct cflayer *adap_layer)
191 struct cflayer *servl = NULL;
192 struct cfcnfg_phyinfo *phyinfo = NULL;
194 caif_assert(adap_layer != NULL);
195 channel_id = adap_layer->id;
196 if (adap_layer->dn == NULL || channel_id == 0) {
197 pr_err("CAIF: %s():adap_layer->id is 0\n", __func__);
201 servl = cfmuxl_remove_uplayer(cnfg->mux, channel_id);
204 layer_set_up(servl, NULL);
205 ret = cfctrl_linkdown_req(cnfg->ctrl, channel_id, adap_layer);
207 pr_err("CAIF: %s(): PROTOCOL ERROR "
208 "- Error removing service_layer Channel_Id(%d)",
209 __func__, channel_id);
213 caif_assert(channel_id == servl->id);
214 if (adap_layer->dn != NULL) {
215 phyid = cfsrvl_getphyid(adap_layer->dn);
217 phyinfo = cfcnfg_get_phyinfo(cnfg, phyid);
218 if (phyinfo == NULL) {
219 pr_warning("CAIF: %s(): "
220 "No interface to send disconnect to\n",
225 if (phyinfo->id != phyid ||
226 phyinfo->phy_layer->id != phyid ||
227 phyinfo->frm_layer->id != phyid) {
228 pr_err("CAIF: %s(): "
229 "Inconsistency in phy registration\n",
235 if (phyinfo != NULL && --phyinfo->phy_ref_count == 0 &&
236 phyinfo->phy_layer != NULL &&
237 phyinfo->phy_layer->modemcmd != NULL) {
238 phyinfo->phy_layer->modemcmd(phyinfo->phy_layer,
239 _CAIF_MODEMCMD_PHYIF_USELESS);
243 cfctrl_cancel_req(cnfg->ctrl, adap_layer);
244 if (adap_layer->ctrlcmd != NULL)
245 adap_layer->ctrlcmd(adap_layer, CAIF_CTRLCMD_DEINIT_RSP, 0);
249 EXPORT_SYMBOL(cfcnfg_disconn_adapt_layer);
251 void cfcnfg_release_adap_layer(struct cflayer *adap_layer)
254 cfsrvl_put(adap_layer->dn);
256 EXPORT_SYMBOL(cfcnfg_release_adap_layer);
258 static void cfcnfg_linkdestroy_rsp(struct cflayer *layer, u8 channel_id)
262 int protohead[CFCTRL_SRV_MASK] = {
263 [CFCTRL_SRV_VEI] = 4,
264 [CFCTRL_SRV_DATAGRAM] = 7,
265 [CFCTRL_SRV_UTIL] = 4,
266 [CFCTRL_SRV_RFM] = 3,
267 [CFCTRL_SRV_DBG] = 3,
270 int cfcnfg_add_adaptation_layer(struct cfcnfg *cnfg,
271 struct cfctrl_link_param *param,
272 struct cflayer *adap_layer,
277 struct cflayer *frml;
278 if (adap_layer == NULL) {
279 pr_err("CAIF: %s(): adap_layer is zero", __func__);
282 if (adap_layer->receive == NULL) {
283 pr_err("CAIF: %s(): adap_layer->receive is NULL", __func__);
286 if (adap_layer->ctrlcmd == NULL) {
287 pr_err("CAIF: %s(): adap_layer->ctrlcmd == NULL", __func__);
290 frml = cnfg->phy_layers[param->phyid].frm_layer;
292 pr_err("CAIF: %s(): Specified PHY type does not exist!",
296 caif_assert(param->phyid == cnfg->phy_layers[param->phyid].id);
297 caif_assert(cnfg->phy_layers[param->phyid].frm_layer->id ==
299 caif_assert(cnfg->phy_layers[param->phyid].phy_layer->id ==
302 *ifindex = cnfg->phy_layers[param->phyid].ifindex;
304 protohead[param->linktype]+
305 (cnfg->phy_layers[param->phyid].use_stx ? 1 : 0);
309 /* FIXME: ENUMERATE INITIALLY WHEN ACTIVATING PHYSICAL INTERFACE */
310 cfctrl_enum_req(cnfg->ctrl, param->phyid);
311 return cfctrl_linkup_request(cnfg->ctrl, param, adap_layer);
313 EXPORT_SYMBOL(cfcnfg_add_adaptation_layer);
315 static void cfcnfg_reject_rsp(struct cflayer *layer, u8 channel_id,
316 struct cflayer *adapt_layer)
318 if (adapt_layer != NULL && adapt_layer->ctrlcmd != NULL)
319 adapt_layer->ctrlcmd(adapt_layer,
320 CAIF_CTRLCMD_INIT_FAIL_RSP, 0);
324 cfcnfg_linkup_rsp(struct cflayer *layer, u8 channel_id, enum cfctrl_srv serv,
325 u8 phyid, struct cflayer *adapt_layer)
327 struct cfcnfg *cnfg = container_obj(layer);
328 struct cflayer *servicel = NULL;
329 struct cfcnfg_phyinfo *phyinfo;
330 struct net_device *netdev;
332 if (adapt_layer == NULL) {
333 pr_debug("CAIF: %s(): link setup response "
334 "but no client exist, send linkdown back\n",
336 cfctrl_linkdown_req(cnfg->ctrl, channel_id, NULL);
340 caif_assert(cnfg != NULL);
341 caif_assert(phyid != 0);
342 phyinfo = &cnfg->phy_layers[phyid];
343 caif_assert(phyinfo->id == phyid);
344 caif_assert(phyinfo->phy_layer != NULL);
345 caif_assert(phyinfo->phy_layer->id == phyid);
347 phyinfo->phy_ref_count++;
348 if (phyinfo->phy_ref_count == 1 &&
349 phyinfo->phy_layer->modemcmd != NULL) {
350 phyinfo->phy_layer->modemcmd(phyinfo->phy_layer,
351 _CAIF_MODEMCMD_PHYIF_USEFULL);
353 adapt_layer->id = channel_id;
357 servicel = cfvei_create(channel_id, &phyinfo->dev_info);
359 case CFCTRL_SRV_DATAGRAM:
360 servicel = cfdgml_create(channel_id, &phyinfo->dev_info);
363 netdev = phyinfo->dev_info.dev;
364 servicel = cfrfml_create(channel_id, &phyinfo->dev_info,
367 case CFCTRL_SRV_UTIL:
368 servicel = cfutill_create(channel_id, &phyinfo->dev_info);
370 case CFCTRL_SRV_VIDEO:
371 servicel = cfvidl_create(channel_id, &phyinfo->dev_info);
374 servicel = cfdbgl_create(channel_id, &phyinfo->dev_info);
377 pr_err("CAIF: %s(): Protocol error. "
378 "Link setup response - unknown channel type\n",
383 pr_warning("CAIF: %s(): Out of memory\n", __func__);
386 layer_set_dn(servicel, cnfg->mux);
387 cfmuxl_set_uplayer(cnfg->mux, servicel, channel_id);
388 layer_set_up(servicel, adapt_layer);
389 layer_set_dn(adapt_layer, servicel);
390 cfsrvl_get(servicel);
391 servicel->ctrlcmd(servicel, CAIF_CTRLCMD_INIT_RSP, 0);
395 cfcnfg_add_phy_layer(struct cfcnfg *cnfg, enum cfcnfg_phy_type phy_type,
396 struct net_device *dev, struct cflayer *phy_layer,
397 u16 *phyid, enum cfcnfg_phy_preference pref,
400 struct cflayer *frml;
401 struct cflayer *phy_driver = NULL;
405 if (cnfg->phy_layers[cnfg->last_phyid].frm_layer == NULL) {
406 *phyid = cnfg->last_phyid;
408 /* range: * 1..(MAX_PHY_LAYERS-1) */
410 (cnfg->last_phyid % (MAX_PHY_LAYERS - 1)) + 1;
413 for (i = 1; i < MAX_PHY_LAYERS; i++) {
414 if (cnfg->phy_layers[i].frm_layer == NULL) {
421 pr_err("CAIF: %s(): No Available PHY ID\n", __func__);
428 cfserl_create(CFPHYTYPE_FRAG, *phyid, stx);
430 pr_warning("CAIF: %s(): Out of memory\n", __func__);
439 pr_err("CAIF: %s(): %d", __func__, phy_type);
444 phy_layer->id = *phyid;
445 cnfg->phy_layers[*phyid].pref = pref;
446 cnfg->phy_layers[*phyid].id = *phyid;
447 cnfg->phy_layers[*phyid].dev_info.id = *phyid;
448 cnfg->phy_layers[*phyid].dev_info.dev = dev;
449 cnfg->phy_layers[*phyid].phy_layer = phy_layer;
450 cnfg->phy_layers[*phyid].phy_ref_count = 0;
451 cnfg->phy_layers[*phyid].ifindex = dev->ifindex;
452 cnfg->phy_layers[*phyid].use_stx = stx;
453 cnfg->phy_layers[*phyid].use_fcs = fcs;
455 phy_layer->type = phy_type;
456 frml = cffrml_create(*phyid, fcs);
458 pr_warning("CAIF: %s(): Out of memory\n", __func__);
461 cnfg->phy_layers[*phyid].frm_layer = frml;
462 cfmuxl_set_dnlayer(cnfg->mux, frml, *phyid);
463 layer_set_up(frml, cnfg->mux);
465 if (phy_driver != NULL) {
466 phy_driver->id = *phyid;
467 layer_set_dn(frml, phy_driver);
468 layer_set_up(phy_driver, frml);
469 layer_set_dn(phy_driver, phy_layer);
470 layer_set_up(phy_layer, phy_driver);
472 layer_set_dn(frml, phy_layer);
473 layer_set_up(phy_layer, frml);
476 EXPORT_SYMBOL(cfcnfg_add_phy_layer);
478 int cfcnfg_del_phy_layer(struct cfcnfg *cnfg, struct cflayer *phy_layer)
480 struct cflayer *frml, *frml_dn;
482 phyid = phy_layer->id;
483 caif_assert(phyid == cnfg->phy_layers[phyid].id);
484 caif_assert(phy_layer == cnfg->phy_layers[phyid].phy_layer);
485 caif_assert(phy_layer->id == phyid);
486 caif_assert(cnfg->phy_layers[phyid].frm_layer->id == phyid);
488 memset(&cnfg->phy_layers[phy_layer->id], 0,
489 sizeof(struct cfcnfg_phyinfo));
490 frml = cfmuxl_remove_dnlayer(cnfg->mux, phy_layer->id);
492 cffrml_set_uplayer(frml, NULL);
493 cffrml_set_dnlayer(frml, NULL);
496 if (phy_layer != frml_dn) {
497 layer_set_up(frml_dn, NULL);
498 layer_set_dn(frml_dn, NULL);
501 layer_set_up(phy_layer, NULL);
504 EXPORT_SYMBOL(cfcnfg_del_phy_layer);