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s0box.c
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1 /* $Id: s0box.c,v 2.6.2.4 2004/01/13 23:48:39 keil Exp $
2  *
3  * low level stuff for Creatix S0BOX
4  *
5  * Author Enrik Berkhan
6  * Copyright by Enrik Berkhan <[email protected]>
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 #include <linux/init.h>
14 #include "hisax.h"
15 #include "isac.h"
16 #include "hscx.h"
17 #include "isdnl1.h"
18 
19 static const char *s0box_revision = "$Revision: 2.6.2.4 $";
20 
21 static inline void
22 writereg(unsigned int padr, signed int addr, u_char off, u_char val) {
23  outb_p(0x1c, padr + 2);
24  outb_p(0x14, padr + 2);
25  outb_p((addr + off) & 0x7f, padr);
26  outb_p(0x16, padr + 2);
27  outb_p(val, padr);
28  outb_p(0x17, padr + 2);
29  outb_p(0x14, padr + 2);
30  outb_p(0x1c, padr + 2);
31 }
32 
33 static u_char nibtab[] = { 1, 9, 5, 0xd, 3, 0xb, 7, 0xf,
34  0, 0, 0, 0, 0, 0, 0, 0,
35  0, 8, 4, 0xc, 2, 0xa, 6, 0xe };
36 
37 static inline u_char
38 readreg(unsigned int padr, signed int addr, u_char off) {
39  register u_char n1, n2;
40 
41  outb_p(0x1c, padr + 2);
42  outb_p(0x14, padr + 2);
43  outb_p((addr + off) | 0x80, padr);
44  outb_p(0x16, padr + 2);
45  outb_p(0x17, padr + 2);
46  n1 = (inb_p(padr + 1) >> 3) & 0x17;
47  outb_p(0x16, padr + 2);
48  n2 = (inb_p(padr + 1) >> 3) & 0x17;
49  outb_p(0x14, padr + 2);
50  outb_p(0x1c, padr + 2);
51  return nibtab[n1] | (nibtab[n2] << 4);
52 }
53 
54 static inline void
55 read_fifo(unsigned int padr, signed int adr, u_char *data, int size)
56 {
57  int i;
58  register u_char n1, n2;
59 
60  outb_p(0x1c, padr + 2);
61  outb_p(0x14, padr + 2);
62  outb_p(adr | 0x80, padr);
63  outb_p(0x16, padr + 2);
64  for (i = 0; i < size; i++) {
65  outb_p(0x17, padr + 2);
66  n1 = (inb_p(padr + 1) >> 3) & 0x17;
67  outb_p(0x16, padr + 2);
68  n2 = (inb_p(padr + 1) >> 3) & 0x17;
69  *(data++) = nibtab[n1] | (nibtab[n2] << 4);
70  }
71  outb_p(0x14, padr + 2);
72  outb_p(0x1c, padr + 2);
73  return;
74 }
75 
76 static inline void
77 write_fifo(unsigned int padr, signed int adr, u_char *data, int size)
78 {
79  int i;
80  outb_p(0x1c, padr + 2);
81  outb_p(0x14, padr + 2);
82  outb_p(adr & 0x7f, padr);
83  for (i = 0; i < size; i++) {
84  outb_p(0x16, padr + 2);
85  outb_p(*(data++), padr);
86  outb_p(0x17, padr + 2);
87  }
88  outb_p(0x14, padr + 2);
89  outb_p(0x1c, padr + 2);
90  return;
91 }
92 
93 /* Interface functions */
94 
95 static u_char
96 ReadISAC(struct IsdnCardState *cs, u_char offset)
97 {
98  return (readreg(cs->hw.teles3.cfg_reg, cs->hw.teles3.isac, offset));
99 }
100 
101 static void
102 WriteISAC(struct IsdnCardState *cs, u_char offset, u_char value)
103 {
104  writereg(cs->hw.teles3.cfg_reg, cs->hw.teles3.isac, offset, value);
105 }
106 
107 static void
108 ReadISACfifo(struct IsdnCardState *cs, u_char *data, int size)
109 {
110  read_fifo(cs->hw.teles3.cfg_reg, cs->hw.teles3.isacfifo, data, size);
111 }
112 
113 static void
114 WriteISACfifo(struct IsdnCardState *cs, u_char *data, int size)
115 {
116  write_fifo(cs->hw.teles3.cfg_reg, cs->hw.teles3.isacfifo, data, size);
117 }
118 
119 static u_char
120 ReadHSCX(struct IsdnCardState *cs, int hscx, u_char offset)
121 {
122  return (readreg(cs->hw.teles3.cfg_reg, cs->hw.teles3.hscx[hscx], offset));
123 }
124 
125 static void
126 WriteHSCX(struct IsdnCardState *cs, int hscx, u_char offset, u_char value)
127 {
128  writereg(cs->hw.teles3.cfg_reg, cs->hw.teles3.hscx[hscx], offset, value);
129 }
130 
131 /*
132  * fast interrupt HSCX stuff goes here
133  */
134 
135 #define READHSCX(cs, nr, reg) readreg(cs->hw.teles3.cfg_reg, cs->hw.teles3.hscx[nr], reg)
136 #define WRITEHSCX(cs, nr, reg, data) writereg(cs->hw.teles3.cfg_reg, cs->hw.teles3.hscx[nr], reg, data)
137 #define READHSCXFIFO(cs, nr, ptr, cnt) read_fifo(cs->hw.teles3.cfg_reg, cs->hw.teles3.hscxfifo[nr], ptr, cnt)
138 #define WRITEHSCXFIFO(cs, nr, ptr, cnt) write_fifo(cs->hw.teles3.cfg_reg, cs->hw.teles3.hscxfifo[nr], ptr, cnt)
139 
140 #include "hscx_irq.c"
141 
142 static irqreturn_t
143 s0box_interrupt(int intno, void *dev_id)
144 {
145 #define MAXCOUNT 5
146  struct IsdnCardState *cs = dev_id;
147  u_char val;
148  u_long flags;
149  int count = 0;
150 
151  spin_lock_irqsave(&cs->lock, flags);
152  val = readreg(cs->hw.teles3.cfg_reg, cs->hw.teles3.hscx[1], HSCX_ISTA);
153 Start_HSCX:
154  if (val)
155  hscx_int_main(cs, val);
156  val = readreg(cs->hw.teles3.cfg_reg, cs->hw.teles3.isac, ISAC_ISTA);
157 Start_ISAC:
158  if (val)
159  isac_interrupt(cs, val);
160  count++;
161  val = readreg(cs->hw.teles3.cfg_reg, cs->hw.teles3.hscx[1], HSCX_ISTA);
162  if (val && count < MAXCOUNT) {
163  if (cs->debug & L1_DEB_HSCX)
164  debugl1(cs, "HSCX IntStat after IntRoutine");
165  goto Start_HSCX;
166  }
167  val = readreg(cs->hw.teles3.cfg_reg, cs->hw.teles3.isac, ISAC_ISTA);
168  if (val && count < MAXCOUNT) {
169  if (cs->debug & L1_DEB_ISAC)
170  debugl1(cs, "ISAC IntStat after IntRoutine");
171  goto Start_ISAC;
172  }
173  if (count >= MAXCOUNT)
174  printk(KERN_WARNING "S0Box: more than %d loops in s0box_interrupt\n", count);
175  writereg(cs->hw.teles3.cfg_reg, cs->hw.teles3.hscx[0], HSCX_MASK, 0xFF);
176  writereg(cs->hw.teles3.cfg_reg, cs->hw.teles3.hscx[1], HSCX_MASK, 0xFF);
177  writereg(cs->hw.teles3.cfg_reg, cs->hw.teles3.isac, ISAC_MASK, 0xFF);
178  writereg(cs->hw.teles3.cfg_reg, cs->hw.teles3.isac, ISAC_MASK, 0x0);
179  writereg(cs->hw.teles3.cfg_reg, cs->hw.teles3.hscx[0], HSCX_MASK, 0x0);
180  writereg(cs->hw.teles3.cfg_reg, cs->hw.teles3.hscx[1], HSCX_MASK, 0x0);
181  spin_unlock_irqrestore(&cs->lock, flags);
182  return IRQ_HANDLED;
183 }
184 
185 static void
186 release_io_s0box(struct IsdnCardState *cs)
187 {
188  release_region(cs->hw.teles3.cfg_reg, 8);
189 }
190 
191 static int
192 S0Box_card_msg(struct IsdnCardState *cs, int mt, void *arg)
193 {
194  u_long flags;
195 
196  switch (mt) {
197  case CARD_RESET:
198  break;
199  case CARD_RELEASE:
200  release_io_s0box(cs);
201  break;
202  case CARD_INIT:
203  spin_lock_irqsave(&cs->lock, flags);
204  inithscxisac(cs, 3);
205  spin_unlock_irqrestore(&cs->lock, flags);
206  break;
207  case CARD_TEST:
208  break;
209  }
210  return (0);
211 }
212 
213 int __devinit
214 setup_s0box(struct IsdnCard *card)
215 {
216  struct IsdnCardState *cs = card->cs;
217  char tmp[64];
218 
219  strcpy(tmp, s0box_revision);
220  printk(KERN_INFO "HiSax: S0Box IO driver Rev. %s\n", HiSax_getrev(tmp));
221  if (cs->typ != ISDN_CTYPE_S0BOX)
222  return (0);
223 
224  cs->hw.teles3.cfg_reg = card->para[1];
225  cs->hw.teles3.hscx[0] = -0x20;
226  cs->hw.teles3.hscx[1] = 0x0;
227  cs->hw.teles3.isac = 0x20;
228  cs->hw.teles3.isacfifo = cs->hw.teles3.isac + 0x3e;
229  cs->hw.teles3.hscxfifo[0] = cs->hw.teles3.hscx[0] + 0x3e;
230  cs->hw.teles3.hscxfifo[1] = cs->hw.teles3.hscx[1] + 0x3e;
231  cs->irq = card->para[0];
232  if (!request_region(cs->hw.teles3.cfg_reg, 8, "S0Box parallel I/O")) {
233  printk(KERN_WARNING "HiSax: S0Box ports %x-%x already in use\n",
234  cs->hw.teles3.cfg_reg,
235  cs->hw.teles3.cfg_reg + 7);
236  return 0;
237  }
238  printk(KERN_INFO "HiSax: S0Box config irq:%d isac:0x%x cfg:0x%x\n",
239  cs->irq,
240  cs->hw.teles3.isac, cs->hw.teles3.cfg_reg);
241  printk(KERN_INFO "HiSax: hscx A:0x%x hscx B:0x%x\n",
242  cs->hw.teles3.hscx[0], cs->hw.teles3.hscx[1]);
243  setup_isac(cs);
244  cs->readisac = &ReadISAC;
245  cs->writeisac = &WriteISAC;
246  cs->readisacfifo = &ReadISACfifo;
247  cs->writeisacfifo = &WriteISACfifo;
248  cs->BC_Read_Reg = &ReadHSCX;
249  cs->BC_Write_Reg = &WriteHSCX;
250  cs->BC_Send_Data = &hscx_fill_fifo;
251  cs->cardmsg = &S0Box_card_msg;
252  cs->irq_func = &s0box_interrupt;
253  ISACVersion(cs, "S0Box:");
254  if (HscxVersion(cs, "S0Box:")) {
255  printk(KERN_WARNING
256  "S0Box: wrong HSCX versions check IO address\n");
257  release_io_s0box(cs);
258  return (0);
259  }
260  return (1);
261 }
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