[ISDN] Hisax: eliminate many unnecessary references to CardType[]
[linux-2.6.git] / drivers / isdn / hisax / bkm_a4t.c
1 /* $Id: bkm_a4t.c,v 1.22.2.4 2004/01/14 16:04:48 keil Exp $
2  *
3  * low level stuff for T-Berkom A4T
4  *
5  * Author       Roland Klabunde
6  * Copyright    by Roland Klabunde   <R.Klabunde@Berkom.de>
7  * 
8  * This software may be used and distributed according to the terms
9  * of the GNU General Public License, incorporated herein by reference.
10  *
11  */
12
13
14 #include <linux/init.h>
15 #include "hisax.h"
16 #include "isac.h"
17 #include "hscx.h"
18 #include "jade.h"
19 #include "isdnl1.h"
20 #include <linux/pci.h>
21 #include "bkm_ax.h"
22
23 static const char *bkm_a4t_revision = "$Revision: 1.22.2.4 $";
24
25
26 static inline u_char
27 readreg(unsigned int ale, unsigned long adr, u_char off)
28 {
29         register u_int ret;
30         unsigned int *po = (unsigned int *) adr;        /* Postoffice */
31
32         *po = (GCS_2 | PO_WRITE | off);
33         __WAITI20__(po);
34         *po = (ale | PO_READ);
35         __WAITI20__(po);
36         ret = *po;
37         return ((unsigned char) ret);
38 }
39
40
41 static inline void
42 readfifo(unsigned int ale, unsigned long adr, u_char off, u_char * data, int size)
43 {
44         int i;
45         for (i = 0; i < size; i++)
46                 *data++ = readreg(ale, adr, off);
47 }
48
49
50 static inline void
51 writereg(unsigned int ale, unsigned long adr, u_char off, u_char data)
52 {
53         unsigned int *po = (unsigned int *) adr;        /* Postoffice */
54         *po = (GCS_2 | PO_WRITE | off);
55         __WAITI20__(po);
56         *po = (ale | PO_WRITE | data);
57         __WAITI20__(po);
58 }
59
60
61 static inline void
62 writefifo(unsigned int ale, unsigned long adr, u_char off, u_char * data, int size)
63 {
64         int i;
65
66         for (i = 0; i < size; i++)
67                 writereg(ale, adr, off, *data++);
68 }
69
70
71 /* Interface functions */
72
73 static u_char
74 ReadISAC(struct IsdnCardState *cs, u_char offset)
75 {
76         return (readreg(cs->hw.ax.isac_ale, cs->hw.ax.isac_adr, offset));
77 }
78
79 static void
80 WriteISAC(struct IsdnCardState *cs, u_char offset, u_char value)
81 {
82         writereg(cs->hw.ax.isac_ale, cs->hw.ax.isac_adr, offset, value);
83 }
84
85 static void
86 ReadISACfifo(struct IsdnCardState *cs, u_char * data, int size)
87 {
88         readfifo(cs->hw.ax.isac_ale, cs->hw.ax.isac_adr, 0, data, size);
89 }
90
91 static void
92 WriteISACfifo(struct IsdnCardState *cs, u_char * data, int size)
93 {
94         writefifo(cs->hw.ax.isac_ale, cs->hw.ax.isac_adr, 0, data, size);
95 }
96
97 static u_char
98 ReadJADE(struct IsdnCardState *cs, int jade, u_char offset)
99 {
100         return (readreg(cs->hw.ax.jade_ale, cs->hw.ax.jade_adr, offset + (jade == -1 ? 0 : (jade ? 0xC0 : 0x80))));
101 }
102
103 static void
104 WriteJADE(struct IsdnCardState *cs, int jade, u_char offset, u_char value)
105 {
106         writereg(cs->hw.ax.jade_ale, cs->hw.ax.jade_adr, offset + (jade == -1 ? 0 : (jade ? 0xC0 : 0x80)), value);
107 }
108
109 /*
110  * fast interrupt JADE stuff goes here
111  */
112
113 #define READJADE(cs, nr, reg) readreg(cs->hw.ax.jade_ale,\
114                 cs->hw.ax.jade_adr, reg + (nr == -1 ? 0 : (nr ? 0xC0 : 0x80)))
115 #define WRITEJADE(cs, nr, reg, data) writereg(cs->hw.ax.jade_ale,\
116                 cs->hw.ax.jade_adr, reg + (nr == -1 ? 0 : (nr ? 0xC0 : 0x80)), data)
117
118 #define READJADEFIFO(cs, nr, ptr, cnt) readfifo(cs->hw.ax.jade_ale,\
119                 cs->hw.ax.jade_adr, (nr == -1 ? 0 : (nr ? 0xC0 : 0x80)), ptr, cnt)
120 #define WRITEJADEFIFO(cs, nr, ptr, cnt) writefifo( cs->hw.ax.jade_ale,\
121                 cs->hw.ax.jade_adr, (nr == -1 ? 0 : (nr ? 0xC0 : 0x80)), ptr, cnt)
122
123 #include "jade_irq.c"
124
125 static irqreturn_t
126 bkm_interrupt(int intno, void *dev_id)
127 {
128         struct IsdnCardState *cs = dev_id;
129         u_char val = 0;
130         u_long flags;
131         I20_REGISTER_FILE *pI20_Regs;
132
133         spin_lock_irqsave(&cs->lock, flags);
134         pI20_Regs = (I20_REGISTER_FILE *) (cs->hw.ax.base);
135
136         /* ISDN interrupt pending? */
137         if (pI20_Regs->i20IntStatus & intISDN) {
138                 /* Reset the ISDN interrupt     */
139                 pI20_Regs->i20IntStatus = intISDN;
140                 /* Disable ISDN interrupt */
141                 pI20_Regs->i20IntCtrl &= ~intISDN;
142                 /* Channel A first */
143                 val = readreg(cs->hw.ax.jade_ale, cs->hw.ax.jade_adr, jade_HDLC_ISR + 0x80);
144                 if (val) {
145                         jade_int_main(cs, val, 0);
146                 }
147                 /* Channel B  */
148                 val = readreg(cs->hw.ax.jade_ale, cs->hw.ax.jade_adr, jade_HDLC_ISR + 0xC0);
149                 if (val) {
150                         jade_int_main(cs, val, 1);
151                 }
152                 /* D-Channel */
153                 val = readreg(cs->hw.ax.isac_ale, cs->hw.ax.isac_adr, ISAC_ISTA);
154                 if (val) {
155                         isac_interrupt(cs, val);
156                 }
157                 /* Reenable ISDN interrupt */
158                 pI20_Regs->i20IntCtrl |= intISDN;
159                 spin_unlock_irqrestore(&cs->lock, flags);
160                 return IRQ_HANDLED;
161         } else {
162                 spin_unlock_irqrestore(&cs->lock, flags);
163                 return IRQ_NONE;
164         }
165 }
166
167 static void
168 release_io_bkm(struct IsdnCardState *cs)
169 {
170         if (cs->hw.ax.base) {
171                 iounmap((void *) cs->hw.ax.base);
172                 cs->hw.ax.base = 0;
173         }
174 }
175
176 static void
177 enable_bkm_int(struct IsdnCardState *cs, unsigned bEnable)
178 {
179         if (cs->typ == ISDN_CTYPE_BKM_A4T) {
180                 I20_REGISTER_FILE *pI20_Regs = (I20_REGISTER_FILE *) (cs->hw.ax.base);
181                 if (bEnable)
182                         pI20_Regs->i20IntCtrl |= (intISDN | intPCI);
183                 else
184                         /* CAUTION: This disables the video capture driver too */
185                         pI20_Regs->i20IntCtrl &= ~(intISDN | intPCI);
186         }
187 }
188
189 static void
190 reset_bkm(struct IsdnCardState *cs)
191 {
192         if (cs->typ == ISDN_CTYPE_BKM_A4T) {
193                 I20_REGISTER_FILE *pI20_Regs = (I20_REGISTER_FILE *) (cs->hw.ax.base);
194                 /* Issue the I20 soft reset     */
195                 pI20_Regs->i20SysControl = 0xFF;        /* all in */
196                 mdelay(10);
197                 /* Remove the soft reset */
198                 pI20_Regs->i20SysControl = sysRESET | 0xFF;
199                 mdelay(10);
200                 /* Set our configuration */
201                 pI20_Regs->i20SysControl = sysRESET | sysCFG;
202                 /* Issue ISDN reset     */
203                 pI20_Regs->i20GuestControl = guestWAIT_CFG |
204                     g_A4T_JADE_RES |
205                     g_A4T_ISAR_RES |
206                     g_A4T_ISAC_RES |
207                     g_A4T_JADE_BOOTR |
208                     g_A4T_ISAR_BOOTR;
209                 mdelay(10);
210
211                 /* Remove RESET state from ISDN */
212                 pI20_Regs->i20GuestControl &= ~(g_A4T_ISAC_RES |
213                                                 g_A4T_JADE_RES |
214                                                 g_A4T_ISAR_RES);
215                 mdelay(10);
216         }
217 }
218
219 static int
220 BKM_card_msg(struct IsdnCardState *cs, int mt, void *arg)
221 {
222         u_long flags;
223
224         switch (mt) {
225                 case CARD_RESET:
226                         /* Disable ints */
227                         spin_lock_irqsave(&cs->lock, flags);
228                         enable_bkm_int(cs, 0);
229                         reset_bkm(cs);
230                         spin_unlock_irqrestore(&cs->lock, flags);
231                         return (0);
232                 case CARD_RELEASE:
233                         /* Sanity */
234                         spin_lock_irqsave(&cs->lock, flags);
235                         enable_bkm_int(cs, 0);
236                         reset_bkm(cs);
237                         spin_unlock_irqrestore(&cs->lock, flags);
238                         release_io_bkm(cs);
239                         return (0);
240                 case CARD_INIT:
241                         spin_lock_irqsave(&cs->lock, flags);
242                         clear_pending_isac_ints(cs);
243                         clear_pending_jade_ints(cs);
244                         initisac(cs);
245                         initjade(cs);
246                         /* Enable ints */
247                         enable_bkm_int(cs, 1);
248                         spin_unlock_irqrestore(&cs->lock, flags);
249                         return (0);
250                 case CARD_TEST:
251                         return (0);
252         }
253         return (0);
254 }
255
256 static int __devinit a4t_pci_probe(struct pci_dev *dev_a4t,
257                                    struct IsdnCardState *cs,
258                                    u_int *found,
259                                    u_int *pci_memaddr)
260 {
261         u16 sub_sys;
262         u16 sub_vendor;
263
264         sub_vendor = dev_a4t->subsystem_vendor;
265         sub_sys = dev_a4t->subsystem_device;
266         if ((sub_sys == PCI_DEVICE_ID_BERKOM_A4T) && (sub_vendor == PCI_VENDOR_ID_BERKOM)) {
267                 if (pci_enable_device(dev_a4t))
268                         return (0);     /* end loop & function */
269                 *found = 1;
270                 *pci_memaddr = pci_resource_start(dev_a4t, 0);
271                 cs->irq = dev_a4t->irq;
272                 return (1);             /* end loop */
273         }
274
275         return (-1);                    /* continue looping */
276 }
277
278 static int __devinit a4t_cs_init(struct IsdnCard *card,
279                                  struct IsdnCardState *cs,
280                                  u_int pci_memaddr)
281 {
282         I20_REGISTER_FILE *pI20_Regs;
283
284         if (!cs->irq) {         /* IRQ range check ?? */
285                 printk(KERN_WARNING "HiSax: Telekom A4T: No IRQ\n");
286                 return (0);
287         }
288         cs->hw.ax.base = (long) ioremap(pci_memaddr, 4096);
289         /* Check suspecious address */
290         pI20_Regs = (I20_REGISTER_FILE *) (cs->hw.ax.base);
291         if ((pI20_Regs->i20IntStatus & 0x8EFFFFFF) != 0) {
292                 printk(KERN_WARNING "HiSax: Telekom A4T address "
293                        "%lx-%lx suspicious\n",
294                        cs->hw.ax.base, cs->hw.ax.base + 4096);
295                 iounmap((void *) cs->hw.ax.base);
296                 cs->hw.ax.base = 0;
297                 return (0);
298         }
299         cs->hw.ax.isac_adr = cs->hw.ax.base + PO_OFFSET;
300         cs->hw.ax.jade_adr = cs->hw.ax.base + PO_OFFSET;
301         cs->hw.ax.isac_ale = GCS_1;
302         cs->hw.ax.jade_ale = GCS_3;
303
304         printk(KERN_INFO "HiSax: Telekom A4T: Card configured at "
305                "0x%lX IRQ %d\n",
306                cs->hw.ax.base, cs->irq);
307
308         setup_isac(cs);
309         cs->readisac = &ReadISAC;
310         cs->writeisac = &WriteISAC;
311         cs->readisacfifo = &ReadISACfifo;
312         cs->writeisacfifo = &WriteISACfifo;
313         cs->BC_Read_Reg = &ReadJADE;
314         cs->BC_Write_Reg = &WriteJADE;
315         cs->BC_Send_Data = &jade_fill_fifo;
316         cs->cardmsg = &BKM_card_msg;
317         cs->irq_func = &bkm_interrupt;
318         cs->irq_flags |= IRQF_SHARED;
319         ISACVersion(cs, "Telekom A4T:");
320         /* Jade version */
321         JadeVersion(cs, "Telekom A4T:");
322
323         return (1);
324 }
325
326 static struct pci_dev *dev_a4t __devinitdata = NULL;
327
328 int __devinit
329 setup_bkm_a4t(struct IsdnCard *card)
330 {
331         struct IsdnCardState *cs = card->cs;
332         char tmp[64];
333         u_int pci_memaddr = 0, found = 0;
334         int ret;
335
336         strcpy(tmp, bkm_a4t_revision);
337         printk(KERN_INFO "HiSax: T-Berkom driver Rev. %s\n", HiSax_getrev(tmp));
338         if (cs->typ == ISDN_CTYPE_BKM_A4T) {
339                 cs->subtyp = BKM_A4T;
340         } else
341                 return (0);
342
343         while ((dev_a4t = pci_find_device(PCI_VENDOR_ID_ZORAN,
344                 PCI_DEVICE_ID_ZORAN_36120, dev_a4t))) {
345                 ret = a4t_pci_probe(dev_a4t, cs, &found, &pci_memaddr);
346                 if (!ret)
347                         return (0);
348                 if (ret > 0)
349                         break;
350         }
351         if (!found) {
352                 printk(KERN_WARNING "HiSax: Telekom A4T: Card not found\n");
353                 return (0);
354         }
355         if (!pci_memaddr) {
356                 printk(KERN_WARNING "HiSax: Telekom A4T: "
357                        "No Memory base address\n");
358                 return (0);
359         }
360
361         return a4t_cs_init(card, cs, pci_memaddr);
362 }