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 extern const char *CardType[];
24
25 static const char *bkm_a4t_revision = "$Revision: 1.22.2.4 $";
26
27
28 static inline u_char
29 readreg(unsigned int ale, unsigned long adr, u_char off)
30 {
31 register u_int ret;
32 unsigned int *po = (unsigned int *) adr; /* Postoffice */
33
34 *po = (GCS_2 | PO_WRITE | off);
35 __WAITI20__(po);
36 *po = (ale | PO_READ);
37 __WAITI20__(po);
38 ret = *po;
39 return ((unsigned char) ret);
40 }
41
42
43 static inline void
44 readfifo(unsigned int ale, unsigned long adr, u_char off, u_char * data, int size)
45 {
46 int i;
47 for (i = 0; i < size; i++)
48 *data++ = readreg(ale, adr, off);
49 }
50
51
52 static inline void
53 writereg(unsigned int ale, unsigned long adr, u_char off, u_char data)
54 {
55 unsigned int *po = (unsigned int *) adr; /* Postoffice */
56 *po = (GCS_2 | PO_WRITE | off);
57 __WAITI20__(po);
58 *po = (ale | PO_WRITE | data);
59 __WAITI20__(po);
60 }
61
62
63 static inline void
64 writefifo(unsigned int ale, unsigned long adr, u_char off, u_char * data, int size)
65 {
66 int i;
67
68 for (i = 0; i < size; i++)
69 writereg(ale, adr, off, *data++);
70 }
71
72
73 /* Interface functions */
74
75 static u_char
76 ReadISAC(struct IsdnCardState *cs, u_char offset)
77 {
78 return (readreg(cs->hw.ax.isac_ale, cs->hw.ax.isac_adr, offset));
79 }
80
81 static void
82 WriteISAC(struct IsdnCardState *cs, u_char offset, u_char value)
83 {
84 writereg(cs->hw.ax.isac_ale, cs->hw.ax.isac_adr, offset, value);
85 }
86
87 static void
88 ReadISACfifo(struct IsdnCardState *cs, u_char * data, int size)
89 {
90 readfifo(cs->hw.ax.isac_ale, cs->hw.ax.isac_adr, 0, data, size);
91 }
92
93 static void
94 WriteISACfifo(struct IsdnCardState *cs, u_char * data, int size)
95 {
96 writefifo(cs->hw.ax.isac_ale, cs->hw.ax.isac_adr, 0, data, size);
97 }
98
99 static u_char
100 ReadJADE(struct IsdnCardState *cs, int jade, u_char offset)
101 {
102 return (readreg(cs->hw.ax.jade_ale, cs->hw.ax.jade_adr, offset + (jade == -1 ? 0 : (jade ? 0xC0 : 0x80))));
103 }
104
105 static void
106 WriteJADE(struct IsdnCardState *cs, int jade, u_char offset, u_char value)
107 {
108 writereg(cs->hw.ax.jade_ale, cs->hw.ax.jade_adr, offset + (jade == -1 ? 0 : (jade ? 0xC0 : 0x80)), value);
109 }
110
111 /*
112 * fast interrupt JADE stuff goes here
113 */
114
115 #define READJADE(cs, nr, reg) readreg(cs->hw.ax.jade_ale,\
116 cs->hw.ax.jade_adr, reg + (nr == -1 ? 0 : (nr ? 0xC0 : 0x80)))
117 #define WRITEJADE(cs, nr, reg, data) writereg(cs->hw.ax.jade_ale,\
118 cs->hw.ax.jade_adr, reg + (nr == -1 ? 0 : (nr ? 0xC0 : 0x80)), data)
119
120 #define READJADEFIFO(cs, nr, ptr, cnt) readfifo(cs->hw.ax.jade_ale,\
121 cs->hw.ax.jade_adr, (nr == -1 ? 0 : (nr ? 0xC0 : 0x80)), ptr, cnt)
122 #define WRITEJADEFIFO(cs, nr, ptr, cnt) writefifo( cs->hw.ax.jade_ale,\
123 cs->hw.ax.jade_adr, (nr == -1 ? 0 : (nr ? 0xC0 : 0x80)), ptr, cnt)
124
125 #include "jade_irq.c"
126
127 static irqreturn_t
128 bkm_interrupt(int intno, void *dev_id)
129 {
130 struct IsdnCardState *cs = dev_id;
131 u_char val = 0;
132 u_long flags;
133 I20_REGISTER_FILE *pI20_Regs;
134
135 spin_lock_irqsave(&cs->lock, flags);
136 pI20_Regs = (I20_REGISTER_FILE *) (cs->hw.ax.base);
137
138 /* ISDN interrupt pending? */
139 if (pI20_Regs->i20IntStatus & intISDN) {
140 /* Reset the ISDN interrupt */
141 pI20_Regs->i20IntStatus = intISDN;
142 /* Disable ISDN interrupt */
143 pI20_Regs->i20IntCtrl &= ~intISDN;
144 /* Channel A first */
145 val = readreg(cs->hw.ax.jade_ale, cs->hw.ax.jade_adr, jade_HDLC_ISR + 0x80);
146 if (val) {
147 jade_int_main(cs, val, 0);
148 }
149 /* Channel B */
150 val = readreg(cs->hw.ax.jade_ale, cs->hw.ax.jade_adr, jade_HDLC_ISR + 0xC0);
151 if (val) {
152 jade_int_main(cs, val, 1);
153 }
154 /* D-Channel */
155 val = readreg(cs->hw.ax.isac_ale, cs->hw.ax.isac_adr, ISAC_ISTA);
156 if (val) {
157 isac_interrupt(cs, val);
158 }
159 /* Reenable ISDN interrupt */
160 pI20_Regs->i20IntCtrl |= intISDN;
161 spin_unlock_irqrestore(&cs->lock, flags);
162 return IRQ_HANDLED;
163 } else {
164 spin_unlock_irqrestore(&cs->lock, flags);
165 return IRQ_NONE;
166 }
167 }
168
169 static void
170 release_io_bkm(struct IsdnCardState *cs)
171 {
172 if (cs->hw.ax.base) {
173 iounmap((void *) cs->hw.ax.base);
174 cs->hw.ax.base = 0;
175 }
176 }
177
178 static void
179 enable_bkm_int(struct IsdnCardState *cs, unsigned bEnable)
180 {
181 if (cs->typ == ISDN_CTYPE_BKM_A4T) {
182 I20_REGISTER_FILE *pI20_Regs = (I20_REGISTER_FILE *) (cs->hw.ax.base);
183 if (bEnable)
184 pI20_Regs->i20IntCtrl |= (intISDN | intPCI);
185 else
186 /* CAUTION: This disables the video capture driver too */
187 pI20_Regs->i20IntCtrl &= ~(intISDN | intPCI);
188 }
189 }
190
191 static void
192 reset_bkm(struct IsdnCardState *cs)
193 {
194 if (cs->typ == ISDN_CTYPE_BKM_A4T) {
195 I20_REGISTER_FILE *pI20_Regs = (I20_REGISTER_FILE *) (cs->hw.ax.base);
196 /* Issue the I20 soft reset */
197 pI20_Regs->i20SysControl = 0xFF; /* all in */
198 mdelay(10);
199 /* Remove the soft reset */
200 pI20_Regs->i20SysControl = sysRESET | 0xFF;
201 mdelay(10);
202 /* Set our configuration */
203 pI20_Regs->i20SysControl = sysRESET | sysCFG;
204 /* Issue ISDN reset */
205 pI20_Regs->i20GuestControl = guestWAIT_CFG |
206 g_A4T_JADE_RES |
207 g_A4T_ISAR_RES |
208 g_A4T_ISAC_RES |
209 g_A4T_JADE_BOOTR |
210 g_A4T_ISAR_BOOTR;
211 mdelay(10);
212
213 /* Remove RESET state from ISDN */
214 pI20_Regs->i20GuestControl &= ~(g_A4T_ISAC_RES |
215 g_A4T_JADE_RES |
216 g_A4T_ISAR_RES);
217 mdelay(10);
218 }
219 }
220
221 static int
222 BKM_card_msg(struct IsdnCardState *cs, int mt, void *arg)
223 {
224 u_long flags;
225
226 switch (mt) {
227 case CARD_RESET:
228 /* Disable ints */
229 spin_lock_irqsave(&cs->lock, flags);
230 enable_bkm_int(cs, 0);
231 reset_bkm(cs);
232 spin_unlock_irqrestore(&cs->lock, flags);
233 return (0);
234 case CARD_RELEASE:
235 /* Sanity */
236 spin_lock_irqsave(&cs->lock, flags);
237 enable_bkm_int(cs, 0);
238 reset_bkm(cs);
239 spin_unlock_irqrestore(&cs->lock, flags);
240 release_io_bkm(cs);
241 return (0);
242 case CARD_INIT:
243 spin_lock_irqsave(&cs->lock, flags);
244 clear_pending_isac_ints(cs);
245 clear_pending_jade_ints(cs);
246 initisac(cs);
247 initjade(cs);
248 /* Enable ints */
249 enable_bkm_int(cs, 1);
250 spin_unlock_irqrestore(&cs->lock, flags);
251 return (0);
252 case CARD_TEST:
253 return (0);
254 }
255 return (0);
256 }
257
258 static int __devinit a4t_pci_probe(struct pci_dev *dev_a4t,
259 struct IsdnCardState *cs,
260 u_int *found,
261 u_int *pci_memaddr)
262 {
263 u16 sub_sys;
264 u16 sub_vendor;
265
266 sub_vendor = dev_a4t->subsystem_vendor;
267 sub_sys = dev_a4t->subsystem_device;
268 if ((sub_sys == PCI_DEVICE_ID_BERKOM_A4T) && (sub_vendor == PCI_VENDOR_ID_BERKOM)) {
269 if (pci_enable_device(dev_a4t))
270 return (0); /* end loop & function */
271 *found = 1;
272 *pci_memaddr = pci_resource_start(dev_a4t, 0);
273 cs->irq = dev_a4t->irq;
274 return (1); /* end loop */
275 }
276
277 return (-1); /* continue looping */
278 }
279
280 static int __devinit a4t_cs_init(struct IsdnCard *card,
281 struct IsdnCardState *cs,
282 u_int pci_memaddr)
283 {
284 I20_REGISTER_FILE *pI20_Regs;
285
286 if (!cs->irq) { /* IRQ range check ?? */
287 printk(KERN_WARNING "HiSax: %s: No IRQ\n", CardType[card->typ]);
288 return (0);
289 }
290 cs->hw.ax.base = (long) ioremap(pci_memaddr, 4096);
291 /* Check suspecious address */
292 pI20_Regs = (I20_REGISTER_FILE *) (cs->hw.ax.base);
293 if ((pI20_Regs->i20IntStatus & 0x8EFFFFFF) != 0) {
294 printk(KERN_WARNING "HiSax: %s address %lx-%lx suspecious\n",
295 CardType[card->typ], cs->hw.ax.base, cs->hw.ax.base + 4096);
296 iounmap((void *) cs->hw.ax.base);
297 cs->hw.ax.base = 0;
298 return (0);
299 }
300 cs->hw.ax.isac_adr = cs->hw.ax.base + PO_OFFSET;
301 cs->hw.ax.jade_adr = cs->hw.ax.base + PO_OFFSET;
302 cs->hw.ax.isac_ale = GCS_1;
303 cs->hw.ax.jade_ale = GCS_3;
304
305 printk(KERN_INFO "HiSax: %s: Card configured at 0x%lX IRQ %d\n",
306 CardType[card->typ], 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: %s: Card not found\n", CardType[card->typ]);
353 return (0);
354 }
355 if (!pci_memaddr) {
356 printk(KERN_WARNING "HiSax: %s: No Memory base address\n", CardType[card->typ]);
357 return (0);
358 }
359
360 return a4t_cs_init(card, cs, pci_memaddr);
361 }
362
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