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enternow_pci.c
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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 <[email protected]>
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
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
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
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 
135 static unsigned char dummyrr(struct IsdnCardState *cs, int chan, unsigned char off)
136 {
137  return (5);
138 }
139 
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
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
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
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 
303 static int __devinit en_pci_probe(struct pci_dev *dev_netjet,
304  struct IsdnCardState *cs)
305 {
306  if (pci_enable_device(dev_netjet))
307  return (0);
308  cs->irq = dev_netjet->irq;
309  if (!cs->irq) {
310  printk(KERN_WARNING "enter:now PCI: No IRQ for PCI card found\n");
311  return (0);
312  }
313  cs->hw.njet.base = pci_resource_start(dev_netjet, 0);
314  if (!cs->hw.njet.base) {
315  printk(KERN_WARNING "enter:now PCI: No IO-Adr for PCI card found\n");
316  return (0);
317  }
318  /* checks Sub-Vendor ID because system crashes with Traverse-Card */
319  if ((dev_netjet->subsystem_vendor != 0x55) ||
320  (dev_netjet->subsystem_device != 0x02)) {
321  printk(KERN_WARNING "enter:now: You tried to load this driver with an incompatible TigerJet-card\n");
322  printk(KERN_WARNING "Use type=20 for Traverse NetJet PCI Card.\n");
323  return (0);
324  }
325 
326  return (1);
327 }
328 
329 static void __devinit en_cs_init(struct IsdnCard *card,
330  struct IsdnCardState *cs)
331 {
332  cs->hw.njet.auxa = cs->hw.njet.base + NETJET_AUXDATA;
333  cs->hw.njet.isac = cs->hw.njet.base + 0xC0; // Fenster zum AMD
334 
335  /* Reset an */
336  cs->hw.njet.ctrl_reg = 0x07; // geändert von 0xff
337  outb(cs->hw.njet.ctrl_reg, cs->hw.njet.base + NETJET_CTRL);
338  /* 20 ms Pause */
339  mdelay(20);
340 
341  cs->hw.njet.ctrl_reg = 0x30; /* Reset Off and status read clear */
342  outb(cs->hw.njet.ctrl_reg, cs->hw.njet.base + NETJET_CTRL);
343  mdelay(10);
344 
345  cs->hw.njet.auxd = 0x00; // war 0xc0
346  cs->hw.njet.dmactrl = 0;
347 
348  outb(~TJ_AMD_IRQ, cs->hw.njet.base + NETJET_AUXCTRL);
349  outb(TJ_AMD_IRQ, cs->hw.njet.base + NETJET_IRQMASK1);
350  outb(cs->hw.njet.auxd, cs->hw.njet.auxa);
351 }
352 
353 static int __devinit en_cs_init_rest(struct IsdnCard *card,
354  struct IsdnCardState *cs)
355 {
356  const int bytecnt = 256;
357 
358  printk(KERN_INFO
359  "enter:now PCI: PCI card configured at 0x%lx IRQ %d\n",
360  cs->hw.njet.base, cs->irq);
361  if (!request_region(cs->hw.njet.base, bytecnt, "Fn_ISDN")) {
362  printk(KERN_WARNING
363  "HiSax: enter:now config port %lx-%lx already in use\n",
364  cs->hw.njet.base,
365  cs->hw.njet.base + bytecnt);
366  return (0);
367  }
368 
369  setup_Amd7930(cs);
370  cs->hw.njet.last_is0 = 0;
371  /* macro rByteAMD */
372  cs->readisac = &ReadByteAmd7930;
373  /* macro wByteAMD */
374  cs->writeisac = &WriteByteAmd7930;
375  cs->dc.amd7930.setIrqMask = &enpci_setIrqMask;
376 
377  cs->BC_Read_Reg = &dummyrr;
378  cs->BC_Write_Reg = &dummywr;
379  cs->BC_Send_Data = &netjet_fill_dma;
380  cs->cardmsg = &enpci_card_msg;
381  cs->irq_func = &enpci_interrupt;
382  cs->irq_flags |= IRQF_SHARED;
383 
384  return (1);
385 }
386 
387 static struct pci_dev *dev_netjet __devinitdata = NULL;
388 
389 /* called by config.c */
390 int __devinit
391 setup_enternow_pci(struct IsdnCard *card)
392 {
393  int ret;
394  struct IsdnCardState *cs = card->cs;
395  char tmp[64];
396 
397 #ifdef __BIG_ENDIAN
398 #error "not running on big endian machines now"
399 #endif
400 
401  strcpy(tmp, enternow_pci_rev);
402  printk(KERN_INFO "HiSax: Formula-n Europe AG enter:now ISDN PCI driver Rev. %s\n", HiSax_getrev(tmp));
403  if (cs->typ != ISDN_CTYPE_ENTERNOW)
404  return (0);
405  test_and_clear_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags);
406 
407  for (;;)
408  {
409  if ((dev_netjet = hisax_find_pci_device(PCI_VENDOR_ID_TIGERJET,
410  PCI_DEVICE_ID_TIGERJET_300, dev_netjet))) {
411  ret = en_pci_probe(dev_netjet, cs);
412  if (!ret)
413  return (0);
414  } else {
415  printk(KERN_WARNING "enter:now PCI: No PCI card found\n");
416  return (0);
417  }
418 
419  en_cs_init(card, cs);
420  break;
421  }
422 
423  return en_cs_init_rest(card, cs);
424 }
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