Pull move-iosapic-to-acpi into release branch
[linux-2.6] / drivers / isdn / hardware / eicon / idifunc.c
1 /* $Id: idifunc.c,v 1.14.4.4 2004/08/28 20:03:53 armin Exp $
2  *
3  * Driver for Eicon DIVA Server ISDN cards.
4  * User Mode IDI Interface 
5  *
6  * Copyright 2000-2003 by Armin Schindler (mac@melware.de)
7  * Copyright 2000-2003 Cytronics & Melware (info@melware.de)
8  *
9  * This software may be used and distributed according to the terms
10  * of the GNU General Public License, incorporated herein by reference.
11  */
12
13 #include "platform.h"
14 #include "di_defs.h"
15 #include "divasync.h"
16 #include "um_xdi.h"
17 #include "um_idi.h"
18
19 #define DBG_MINIMUM  (DL_LOG + DL_FTL + DL_ERR)
20 #define DBG_DEFAULT  (DBG_MINIMUM + DL_XLOG + DL_REG)
21
22 extern char *DRIVERRELEASE_IDI;
23
24 extern void DIVA_DIDD_Read(void *, int);
25 extern int diva_user_mode_idi_create_adapter(const DESCRIPTOR *, int);
26 extern void diva_user_mode_idi_remove_adapter(int);
27
28 static dword notify_handle;
29 static DESCRIPTOR DAdapter;
30 static DESCRIPTOR MAdapter;
31
32 static void no_printf(unsigned char *x, ...)
33 {
34         /* dummy debug function */
35 }
36
37 #include "debuglib.c"
38
39 /*
40  * stop debug
41  */
42 static void stop_dbg(void)
43 {
44         DbgDeregister();
45         memset(&MAdapter, 0, sizeof(MAdapter));
46         dprintf = no_printf;
47 }
48
49 typedef struct _udiva_card {
50         struct list_head list;
51         int Id;
52         DESCRIPTOR d;
53 } udiva_card;
54
55 static LIST_HEAD(cards);
56 static diva_os_spin_lock_t ll_lock;
57
58 /*
59  * find card in list
60  */
61 static udiva_card *find_card_in_list(DESCRIPTOR * d)
62 {
63         udiva_card *card;
64         struct list_head *tmp;
65         diva_os_spin_lock_magic_t old_irql;
66
67         diva_os_enter_spin_lock(&ll_lock, &old_irql, "find card");
68         list_for_each(tmp, &cards) {
69                 card = list_entry(tmp, udiva_card, list);
70                 if (card->d.request == d->request) {
71                         diva_os_leave_spin_lock(&ll_lock, &old_irql,
72                                                 "find card");
73                         return (card);
74                 }
75         }
76         diva_os_leave_spin_lock(&ll_lock, &old_irql, "find card");
77         return ((udiva_card *) NULL);
78 }
79
80 /*
81  * new card
82  */
83 static void um_new_card(DESCRIPTOR * d)
84 {
85         int adapter_nr = 0;
86         udiva_card *card = NULL;
87         IDI_SYNC_REQ sync_req;
88         diva_os_spin_lock_magic_t old_irql;
89
90         if (!(card = diva_os_malloc(0, sizeof(udiva_card)))) {
91                 DBG_ERR(("cannot get buffer for card"));
92                 return;
93         }
94         memcpy(&card->d, d, sizeof(DESCRIPTOR));
95         sync_req.xdi_logical_adapter_number.Req = 0;
96         sync_req.xdi_logical_adapter_number.Rc =
97             IDI_SYNC_REQ_XDI_GET_LOGICAL_ADAPTER_NUMBER;
98         card->d.request((ENTITY *) & sync_req);
99         adapter_nr =
100             sync_req.xdi_logical_adapter_number.info.logical_adapter_number;
101         card->Id = adapter_nr;
102         if (!(diva_user_mode_idi_create_adapter(d, adapter_nr))) {
103                 diva_os_enter_spin_lock(&ll_lock, &old_irql, "add card");
104                 list_add_tail(&card->list, &cards);
105                 diva_os_leave_spin_lock(&ll_lock, &old_irql, "add card");
106         } else {
107                 DBG_ERR(("could not create user mode idi card %d",
108                          adapter_nr));
109         }
110 }
111
112 /*
113  * remove card
114  */
115 static void um_remove_card(DESCRIPTOR * d)
116 {
117         diva_os_spin_lock_magic_t old_irql;
118         udiva_card *card = NULL;
119
120         if (!(card = find_card_in_list(d))) {
121                 DBG_ERR(("cannot find card to remove"));
122                 return;
123         }
124         diva_user_mode_idi_remove_adapter(card->Id);
125         diva_os_enter_spin_lock(&ll_lock, &old_irql, "remove card");
126         list_del(&card->list);
127         diva_os_leave_spin_lock(&ll_lock, &old_irql, "remove card");
128         DBG_LOG(("idi proc entry removed for card %d", card->Id));
129         diva_os_free(0, card);
130 }
131
132 /*
133  * remove all adapter
134  */
135 static void DIVA_EXIT_FUNCTION remove_all_idi_proc(void)
136 {
137         udiva_card *card;
138         diva_os_spin_lock_magic_t old_irql;
139
140 rescan:
141         diva_os_enter_spin_lock(&ll_lock, &old_irql, "remove all");
142         if (!list_empty(&cards)) {
143                 card = list_entry(cards.next, udiva_card, list);
144                 list_del(&card->list);
145                 diva_os_leave_spin_lock(&ll_lock, &old_irql, "remove all");
146                 diva_user_mode_idi_remove_adapter(card->Id);
147                 diva_os_free(0, card);
148                 goto rescan;
149         }
150         diva_os_leave_spin_lock(&ll_lock, &old_irql, "remove all");
151 }
152
153 /*
154  * DIDD notify callback
155  */
156 static void *didd_callback(void *context, DESCRIPTOR * adapter,
157                            int removal)
158 {
159         if (adapter->type == IDI_DADAPTER) {
160                 DBG_ERR(("Notification about IDI_DADAPTER change ! Oops."));
161                 return (NULL);
162         } else if (adapter->type == IDI_DIMAINT) {
163                 if (removal) {
164                         stop_dbg();
165                 } else {
166                         memcpy(&MAdapter, adapter, sizeof(MAdapter));
167                         dprintf = (DIVA_DI_PRINTF) MAdapter.request;
168                         DbgRegister("User IDI", DRIVERRELEASE_IDI, DBG_DEFAULT);
169                 }
170         } else if ((adapter->type > 0) && (adapter->type < 16)) {       /* IDI Adapter */
171                 if (removal) {
172                         um_remove_card(adapter);
173                 } else {
174                         um_new_card(adapter);
175                 }
176         }
177         return (NULL);
178 }
179
180 /*
181  * connect DIDD
182  */
183 static int DIVA_INIT_FUNCTION connect_didd(void)
184 {
185         int x = 0;
186         int dadapter = 0;
187         IDI_SYNC_REQ req;
188         DESCRIPTOR DIDD_Table[MAX_DESCRIPTORS];
189
190         DIVA_DIDD_Read(DIDD_Table, sizeof(DIDD_Table));
191
192         for (x = 0; x < MAX_DESCRIPTORS; x++) {
193                 if (DIDD_Table[x].type == IDI_DADAPTER) {       /* DADAPTER found */
194                         dadapter = 1;
195                         memcpy(&DAdapter, &DIDD_Table[x], sizeof(DAdapter));
196                         req.didd_notify.e.Req = 0;
197                         req.didd_notify.e.Rc =
198                             IDI_SYNC_REQ_DIDD_REGISTER_ADAPTER_NOTIFY;
199                         req.didd_notify.info.callback = (void *)didd_callback;
200                         req.didd_notify.info.context = NULL;
201                         DAdapter.request((ENTITY *) & req);
202                         if (req.didd_notify.e.Rc != 0xff) {
203                                 stop_dbg();
204                                 return (0);
205                         }
206                         notify_handle = req.didd_notify.info.handle;
207                 } else if (DIDD_Table[x].type == IDI_DIMAINT) { /* MAINT found */
208                         memcpy(&MAdapter, &DIDD_Table[x], sizeof(DAdapter));
209                         dprintf = (DIVA_DI_PRINTF) MAdapter.request;
210                         DbgRegister("User IDI", DRIVERRELEASE_IDI, DBG_DEFAULT);
211                 } else if ((DIDD_Table[x].type > 0)
212                            && (DIDD_Table[x].type < 16)) {      /* IDI Adapter found */
213                         um_new_card(&DIDD_Table[x]);
214                 }
215         }
216
217         if (!dadapter) {
218                 stop_dbg();
219         }
220
221         return (dadapter);
222 }
223
224 /*
225  *  Disconnect from DIDD
226  */
227 static void DIVA_EXIT_FUNCTION disconnect_didd(void)
228 {
229         IDI_SYNC_REQ req;
230
231         stop_dbg();
232
233         req.didd_notify.e.Req = 0;
234         req.didd_notify.e.Rc = IDI_SYNC_REQ_DIDD_REMOVE_ADAPTER_NOTIFY;
235         req.didd_notify.info.handle = notify_handle;
236         DAdapter.request((ENTITY *) & req);
237 }
238
239 /*
240  * init
241  */
242 int DIVA_INIT_FUNCTION idifunc_init(void)
243 {
244         diva_os_initialize_spin_lock(&ll_lock, "idifunc");
245
246         if (diva_user_mode_idi_init()) {
247                 DBG_ERR(("init: init failed."));
248                 return (0);
249         }
250
251         if (!connect_didd()) {
252                 diva_user_mode_idi_finit();
253                 DBG_ERR(("init: failed to connect to DIDD."));
254                 return (0);
255         }
256         return (1);
257 }
258
259 /*
260  * finit
261  */
262 void DIVA_EXIT_FUNCTION idifunc_finit(void)
263 {
264         diva_user_mode_idi_finit();
265         disconnect_didd();
266         remove_all_idi_proc();
267 }