1 /* enternow_pci.c,v 0.99 2001/10/02
2 *
3 * enternow_pci.c Card-specific routines for
4 * Formula-n enter:now ISDN PCI ab
5 * Gerdes AG Power ISDN PCI
6 * Woerltronic SA 16 PCI
7 * (based on HiSax driver by Karsten Keil)
8 *
9 * Author Christoph Ersfeld <info@formula-n.de>
10 * Formula-n Europe AG (www.formula-n.com)
11 * previously Gerdes AG
12 *
13 *
14 * This file is (c) under GNU PUBLIC LICENSE
15 *
16 * Notes:
17 * This driver interfaces to netjet.c which performs B-channel
18 * processing.
19 *
20 * Version 0.99 is the first release of this driver and there are
21 * certainly a few bugs.
22 * It isn't testet on linux 2.4 yet, so consider this code to be
23 * beta.
24 *
25 * Please don't report me any malfunction without sending
26 * (compressed) debug-logs.
27 * It would be nearly impossible to retrace it.
28 *
29 * Log D-channel-processing as follows:
30 *
31 * 1. Load hisax with card-specific parameters, this example ist for
32 * Formula-n enter:now ISDN PCI and compatible
33 * (f.e. Gerdes Power ISDN PCI)
34 *
35 * modprobe hisax type=41 protocol=2 id=gerdes
36 *
37 * if you chose an other value for id, you need to modify the
38 * code below, too.
39 *
40 * 2. set debug-level
41 *
42 * hisaxctrl gerdes 1 0x3ff
43 * hisaxctrl gerdes 11 0x4f
44 * cat /dev/isdnctrl >> ~/log &
45 *
46 * Please take also a look into /var/log/messages if there is
47 * anything importand concerning HISAX.
48 *
49 *
50 * Credits:
51 * Programming the driver for Formula-n enter:now ISDN PCI and
52 * necessary the driver for the used Amd 7930 D-channel-controller
53 * was spnsored by Formula-n Europe AG.
54 * Thanks to Karsten Keil and Petr Novak, who gave me support in
55 * Hisax-specific questions.
56 * I want so say special thanks to Carl-Friedrich Braun, who had to
57 * answer a lot of questions about generally ISDN and about handling
58 * of the Amd-Chip.
59 *
60 */
61
62
63 #include "hisax.h"
64 #include "isac.h"
65 #include "isdnl1.h"
66 #include "amd7930_fn.h"
67 #include <linux/interrupt.h>
68 #include <linux/ppp_defs.h>
69 #include <linux/pci.h>
70 #include <linux/init.h>
71 #include "netjet.h"
72
73
74
75 static const char *enternow_pci_rev = "$Revision: 1.1.4.5 $";
76
77
78 /* for PowerISDN PCI */
79 #define TJ_AMD_IRQ 0x20
80 #define TJ_LED1 0x40
81 #define TJ_LED2 0x80
82
83
84 /* The window to [the] AMD [chip]...
85 * From address hw.njet.base + TJ_AMD_PORT onwards, the AMD
86 * maps [consecutive/multiple] 8 bits into the TigerJet I/O space
87 * -> 0x01 of the AMD at hw.njet.base + 0C4 */
88 #define TJ_AMD_PORT 0xC0
89
90
91
92 /* *************************** I/O-Interface functions ************************************* */
93
94
95 /* cs->readisac, macro rByteAMD */
96 static unsigned char
ReadByteAmd7930(struct IsdnCardState * cs,unsigned char offset)97 ReadByteAmd7930(struct IsdnCardState *cs, unsigned char offset)
98 {
99 /* direct register */
100 if (offset < 8)
101 return (inb(cs->hw.njet.isac + 4 * offset));
102
103 /* indirect register */
104 else {
105 outb(offset, cs->hw.njet.isac + 4 * AMD_CR);
106 return (inb(cs->hw.njet.isac + 4 * AMD_DR));
107 }
108 }
109
110 /* cs->writeisac, macro wByteAMD */
111 static void
WriteByteAmd7930(struct IsdnCardState * cs,unsigned char offset,unsigned char value)112 WriteByteAmd7930(struct IsdnCardState *cs, unsigned char offset, unsigned char value)
113 {
114 /* direct register */
115 if (offset < 8)
116 outb(value, cs->hw.njet.isac + 4 * offset);
117
118 /* indirect register */
119 else {
120 outb(offset, cs->hw.njet.isac + 4 * AMD_CR);
121 outb(value, cs->hw.njet.isac + 4 * AMD_DR);
122 }
123 }
124
125
126 static void
enpci_setIrqMask(struct IsdnCardState * cs,unsigned char val)127 enpci_setIrqMask(struct IsdnCardState *cs, unsigned char val) {
128 if (!val)
129 outb(0x00, cs->hw.njet.base + NETJET_IRQMASK1);
130 else
131 outb(TJ_AMD_IRQ, cs->hw.njet.base + NETJET_IRQMASK1);
132 }
133
134
dummyrr(struct IsdnCardState * cs,int chan,unsigned char off)135 static unsigned char dummyrr(struct IsdnCardState *cs, int chan, unsigned char off)
136 {
137 return (5);
138 }
139
dummywr(struct IsdnCardState * cs,int chan,unsigned char off,unsigned char value)140 static void dummywr(struct IsdnCardState *cs, int chan, unsigned char off, unsigned char value)
141 {
142
143 }
144
145
146 /* ******************************************************************************** */
147
148
149 static void
reset_enpci(struct IsdnCardState * cs)150 reset_enpci(struct IsdnCardState *cs)
151 {
152 if (cs->debug & L1_DEB_ISAC)
153 debugl1(cs, "enter:now PCI: reset");
154
155 /* Reset on, (also for AMD) */
156 cs->hw.njet.ctrl_reg = 0x07;
157 outb(cs->hw.njet.ctrl_reg, cs->hw.njet.base + NETJET_CTRL);
158 mdelay(20);
159 /* Reset off */
160 cs->hw.njet.ctrl_reg = 0x30;
161 outb(cs->hw.njet.ctrl_reg, cs->hw.njet.base + NETJET_CTRL);
162 /* 20ms delay */
163 mdelay(20);
164 cs->hw.njet.auxd = 0; // LED-status
165 cs->hw.njet.dmactrl = 0;
166 outb(~TJ_AMD_IRQ, cs->hw.njet.base + NETJET_AUXCTRL);
167 outb(TJ_AMD_IRQ, cs->hw.njet.base + NETJET_IRQMASK1);
168 outb(cs->hw.njet.auxd, cs->hw.njet.auxa); // LED off
169 }
170
171
172 static int
enpci_card_msg(struct IsdnCardState * cs,int mt,void * arg)173 enpci_card_msg(struct IsdnCardState *cs, int mt, void *arg)
174 {
175 u_long flags;
176 unsigned char *chan;
177
178 if (cs->debug & L1_DEB_ISAC)
179 debugl1(cs, "enter:now PCI: card_msg: 0x%04X", mt);
180
181 switch (mt) {
182 case CARD_RESET:
183 spin_lock_irqsave(&cs->lock, flags);
184 reset_enpci(cs);
185 Amd7930_init(cs);
186 spin_unlock_irqrestore(&cs->lock, flags);
187 break;
188 case CARD_RELEASE:
189 release_io_netjet(cs);
190 break;
191 case CARD_INIT:
192 reset_enpci(cs);
193 inittiger(cs);
194 /* irq must be on here */
195 Amd7930_init(cs);
196 break;
197 case CARD_TEST:
198 break;
199 case MDL_ASSIGN:
200 /* TEI assigned, LED1 on */
201 cs->hw.njet.auxd = TJ_AMD_IRQ << 1;
202 outb(cs->hw.njet.auxd, cs->hw.njet.base + NETJET_AUXDATA);
203 break;
204 case MDL_REMOVE:
205 /* TEI removed, LEDs off */
206 cs->hw.njet.auxd = 0;
207 outb(0x00, cs->hw.njet.base + NETJET_AUXDATA);
208 break;
209 case MDL_BC_ASSIGN:
210 /* activate B-channel */
211 chan = (unsigned char *)arg;
212
213 if (cs->debug & L1_DEB_ISAC)
214 debugl1(cs, "enter:now PCI: assign phys. BC %d in AMD LMR1", *chan);
215
216 cs->dc.amd7930.ph_command(cs, (cs->dc.amd7930.lmr1 | (*chan + 1)), "MDL_BC_ASSIGN");
217 /* at least one b-channel in use, LED 2 on */
218 cs->hw.njet.auxd |= TJ_AMD_IRQ << 2;
219 outb(cs->hw.njet.auxd, cs->hw.njet.base + NETJET_AUXDATA);
220 break;
221 case MDL_BC_RELEASE:
222 /* deactivate B-channel */
223 chan = (unsigned char *)arg;
224
225 if (cs->debug & L1_DEB_ISAC)
226 debugl1(cs, "enter:now PCI: release phys. BC %d in Amd LMR1", *chan);
227
228 cs->dc.amd7930.ph_command(cs, (cs->dc.amd7930.lmr1 & ~(*chan + 1)), "MDL_BC_RELEASE");
229 /* no b-channel active -> LED2 off */
230 if (!(cs->dc.amd7930.lmr1 & 3)) {
231 cs->hw.njet.auxd &= ~(TJ_AMD_IRQ << 2);
232 outb(cs->hw.njet.auxd, cs->hw.njet.base + NETJET_AUXDATA);
233 }
234 break;
235 default:
236 break;
237
238 }
239 return (0);
240 }
241
242 static irqreturn_t
enpci_interrupt(int intno,void * dev_id)243 enpci_interrupt(int intno, void *dev_id)
244 {
245 struct IsdnCardState *cs = dev_id;
246 unsigned char s0val, s1val, ir;
247 u_long flags;
248
249 spin_lock_irqsave(&cs->lock, flags);
250 s1val = inb(cs->hw.njet.base + NETJET_IRQSTAT1);
251
252 /* AMD threw an interrupt */
253 if (!(s1val & TJ_AMD_IRQ)) {
254 /* read and clear interrupt-register */
255 ir = ReadByteAmd7930(cs, 0x00);
256 Amd7930_interrupt(cs, ir);
257 s1val = 1;
258 } else
259 s1val = 0;
260 s0val = inb(cs->hw.njet.base + NETJET_IRQSTAT0);
261 if ((s0val | s1val) == 0) { // shared IRQ
262 spin_unlock_irqrestore(&cs->lock, flags);
263 return IRQ_NONE;
264 }
265 if (s0val)
266 outb(s0val, cs->hw.njet.base + NETJET_IRQSTAT0);
267
268 /* DMA-Interrupt: B-channel-stuff */
269 /* set bits in sval to indicate which page is free */
270 if (inl(cs->hw.njet.base + NETJET_DMA_WRITE_ADR) <
271 inl(cs->hw.njet.base + NETJET_DMA_WRITE_IRQ))
272 /* the 2nd write page is free */
273 s0val = 0x08;
274 else /* the 1st write page is free */
275 s0val = 0x04;
276 if (inl(cs->hw.njet.base + NETJET_DMA_READ_ADR) <
277 inl(cs->hw.njet.base + NETJET_DMA_READ_IRQ))
278 /* the 2nd read page is free */
279 s0val = s0val | 0x02;
280 else /* the 1st read page is free */
281 s0val = s0val | 0x01;
282 if (s0val != cs->hw.njet.last_is0) /* we have a DMA interrupt */
283 {
284 if (test_and_set_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags)) {
285 spin_unlock_irqrestore(&cs->lock, flags);
286 return IRQ_HANDLED;
287 }
288 cs->hw.njet.irqstat0 = s0val;
289 if ((cs->hw.njet.irqstat0 & NETJET_IRQM0_READ) !=
290 (cs->hw.njet.last_is0 & NETJET_IRQM0_READ))
291 /* we have a read dma int */
292 read_tiger(cs);
293 if ((cs->hw.njet.irqstat0 & NETJET_IRQM0_WRITE) !=
294 (cs->hw.njet.last_is0 & NETJET_IRQM0_WRITE))
295 /* we have a write dma int */
296 write_tiger(cs);
297 test_and_clear_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags);
298 }
299 spin_unlock_irqrestore(&cs->lock, flags);
300 return IRQ_HANDLED;
301 }
302
en_pci_probe(struct pci_dev * dev_netjet,struct IsdnCardState * cs)303 static int en_pci_probe(struct pci_dev *dev_netjet, struct IsdnCardState *cs)
304 {
305 if (pci_enable_device(dev_netjet))
306 return (0);
307 cs->irq = dev_netjet->irq;
308 if (!cs->irq) {
309 printk(KERN_WARNING "enter:now PCI: No IRQ for PCI card found\n");
310 return (0);
311 }
312 cs->hw.njet.base = pci_resource_start(dev_netjet, 0);
313 if (!cs->hw.njet.base) {
314 printk(KERN_WARNING "enter:now PCI: No IO-Adr for PCI card found\n");
315 return (0);
316 }
317 /* checks Sub-Vendor ID because system crashes with Traverse-Card */
318 if ((dev_netjet->subsystem_vendor != 0x55) ||
319 (dev_netjet->subsystem_device != 0x02)) {
320 printk(KERN_WARNING "enter:now: You tried to load this driver with an incompatible TigerJet-card\n");
321 printk(KERN_WARNING "Use type=20 for Traverse NetJet PCI Card.\n");
322 return (0);
323 }
324
325 return (1);
326 }
327
en_cs_init(struct IsdnCard * card,struct IsdnCardState * cs)328 static void en_cs_init(struct IsdnCard *card, struct IsdnCardState *cs)
329 {
330 cs->hw.njet.auxa = cs->hw.njet.base + NETJET_AUXDATA;
331 cs->hw.njet.isac = cs->hw.njet.base + 0xC0; // Fenster zum AMD
332
333 /* Reset an */
334 cs->hw.njet.ctrl_reg = 0x07; // geändert von 0xff
335 outb(cs->hw.njet.ctrl_reg, cs->hw.njet.base + NETJET_CTRL);
336 /* 20 ms Pause */
337 mdelay(20);
338
339 cs->hw.njet.ctrl_reg = 0x30; /* Reset Off and status read clear */
340 outb(cs->hw.njet.ctrl_reg, cs->hw.njet.base + NETJET_CTRL);
341 mdelay(10);
342
343 cs->hw.njet.auxd = 0x00; // war 0xc0
344 cs->hw.njet.dmactrl = 0;
345
346 outb(~TJ_AMD_IRQ, cs->hw.njet.base + NETJET_AUXCTRL);
347 outb(TJ_AMD_IRQ, cs->hw.njet.base + NETJET_IRQMASK1);
348 outb(cs->hw.njet.auxd, cs->hw.njet.auxa);
349 }
350
en_cs_init_rest(struct IsdnCard * card,struct IsdnCardState * cs)351 static int en_cs_init_rest(struct IsdnCard *card, struct IsdnCardState *cs)
352 {
353 const int bytecnt = 256;
354
355 printk(KERN_INFO
356 "enter:now PCI: PCI card configured at 0x%lx IRQ %d\n",
357 cs->hw.njet.base, cs->irq);
358 if (!request_region(cs->hw.njet.base, bytecnt, "Fn_ISDN")) {
359 printk(KERN_WARNING
360 "HiSax: enter:now config port %lx-%lx already in use\n",
361 cs->hw.njet.base,
362 cs->hw.njet.base + bytecnt);
363 return (0);
364 }
365
366 setup_Amd7930(cs);
367 cs->hw.njet.last_is0 = 0;
368 /* macro rByteAMD */
369 cs->readisac = &ReadByteAmd7930;
370 /* macro wByteAMD */
371 cs->writeisac = &WriteByteAmd7930;
372 cs->dc.amd7930.setIrqMask = &enpci_setIrqMask;
373
374 cs->BC_Read_Reg = &dummyrr;
375 cs->BC_Write_Reg = &dummywr;
376 cs->BC_Send_Data = &netjet_fill_dma;
377 cs->cardmsg = &enpci_card_msg;
378 cs->irq_func = &enpci_interrupt;
379 cs->irq_flags |= IRQF_SHARED;
380
381 return (1);
382 }
383
384 static struct pci_dev *dev_netjet = NULL;
385
386 /* called by config.c */
setup_enternow_pci(struct IsdnCard * card)387 int setup_enternow_pci(struct IsdnCard *card)
388 {
389 int ret;
390 struct IsdnCardState *cs = card->cs;
391 char tmp[64];
392
393 #ifdef __BIG_ENDIAN
394 #error "not running on big endian machines now"
395 #endif
396
397 strcpy(tmp, enternow_pci_rev);
398 printk(KERN_INFO "HiSax: Formula-n Europe AG enter:now ISDN PCI driver Rev. %s\n", HiSax_getrev(tmp));
399 if (cs->typ != ISDN_CTYPE_ENTERNOW)
400 return (0);
401 test_and_clear_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags);
402
403 for (;;)
404 {
405 if ((dev_netjet = hisax_find_pci_device(PCI_VENDOR_ID_TIGERJET,
406 PCI_DEVICE_ID_TIGERJET_300, dev_netjet))) {
407 ret = en_pci_probe(dev_netjet, cs);
408 if (!ret)
409 return (0);
410 } else {
411 printk(KERN_WARNING "enter:now PCI: No PCI card found\n");
412 return (0);
413 }
414
415 en_cs_init(card, cs);
416 break;
417 }
418
419 return en_cs_init_rest(card, cs);
420 }
421