Merge branch 'for-linus' of git://one.firstfloor.org/home/andi/git/linux-2.6
[linux-2.6] / drivers / isdn / hisax / nj_s.c
1 /* $Id: nj_s.c,v 2.13.2.4 2004/01/16 01:53:48 keil Exp $
2  *
3  * This software may be used and distributed according to the terms
4  * of the GNU General Public License, incorporated herein by reference.
5  *
6  */
7
8 #include <linux/init.h>
9 #include "hisax.h"
10 #include "isac.h"
11 #include "isdnl1.h"
12 #include <linux/pci.h>
13 #include <linux/interrupt.h>
14 #include <linux/ppp_defs.h>
15 #include "netjet.h"
16
17 static const char *NETjet_S_revision = "$Revision: 2.13.2.4 $";
18
19 static u_char dummyrr(struct IsdnCardState *cs, int chan, u_char off)
20 {
21         return(5);
22 }
23
24 static void dummywr(struct IsdnCardState *cs, int chan, u_char off, u_char value)
25 {
26 }
27
28 static irqreturn_t
29 netjet_s_interrupt(int intno, void *dev_id)
30 {
31         struct IsdnCardState *cs = dev_id;
32         u_char val, s1val, s0val;
33         u_long flags;
34
35         spin_lock_irqsave(&cs->lock, flags);
36         s1val = bytein(cs->hw.njet.base + NETJET_IRQSTAT1);
37         if (!(s1val & NETJET_ISACIRQ)) {
38                 val = NETjet_ReadIC(cs, ISAC_ISTA);
39                 if (cs->debug & L1_DEB_ISAC)
40                         debugl1(cs, "tiger: i1 %x %x", s1val, val);
41                 if (val) {
42                         isac_interrupt(cs, val);
43                         NETjet_WriteIC(cs, ISAC_MASK, 0xFF);
44                         NETjet_WriteIC(cs, ISAC_MASK, 0x0);
45                 }
46                 s1val = 1;
47         } else
48                 s1val = 0;
49         /* 
50          * read/write stat0 is better, because lower IRQ rate
51          * Note the IRQ is on for 125 us if a condition match
52          * thats long on modern CPU and so the IRQ is reentered
53          * all the time.
54          */
55         s0val = bytein(cs->hw.njet.base + NETJET_IRQSTAT0);
56         if ((s0val | s1val)==0) { // shared IRQ
57                 spin_unlock_irqrestore(&cs->lock, flags);
58                 return IRQ_NONE;
59         } 
60         if (s0val)
61                 byteout(cs->hw.njet.base + NETJET_IRQSTAT0, s0val);
62         /* start new code 13/07/00 GE */
63         /* set bits in sval to indicate which page is free */
64         if (inl(cs->hw.njet.base + NETJET_DMA_WRITE_ADR) <
65                 inl(cs->hw.njet.base + NETJET_DMA_WRITE_IRQ))
66                 /* the 2nd write page is free */
67                 s0val = 0x08;
68         else    /* the 1st write page is free */
69                 s0val = 0x04;   
70         if (inl(cs->hw.njet.base + NETJET_DMA_READ_ADR) <
71                 inl(cs->hw.njet.base + NETJET_DMA_READ_IRQ))
72                 /* the 2nd read page is free */
73                 s0val |= 0x02;
74         else    /* the 1st read page is free */
75                 s0val |= 0x01;  
76         if (s0val != cs->hw.njet.last_is0) /* we have a DMA interrupt */
77         {
78                 if (test_and_set_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags)) {
79                         printk(KERN_WARNING "nj LOCK_ATOMIC s0val %x->%x\n",
80                                 cs->hw.njet.last_is0, s0val);
81                         spin_unlock_irqrestore(&cs->lock, flags);
82                         return IRQ_HANDLED;
83                 }
84                 cs->hw.njet.irqstat0 = s0val;
85                 if ((cs->hw.njet.irqstat0 & NETJET_IRQM0_READ) != 
86                         (cs->hw.njet.last_is0 & NETJET_IRQM0_READ))
87                         /* we have a read dma int */
88                         read_tiger(cs);
89                 if ((cs->hw.njet.irqstat0 & NETJET_IRQM0_WRITE) !=
90                         (cs->hw.njet.last_is0 & NETJET_IRQM0_WRITE))
91                         /* we have a write dma int */
92                         write_tiger(cs);
93                 /* end new code 13/07/00 GE */
94                 test_and_clear_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags);
95         }
96         spin_unlock_irqrestore(&cs->lock, flags);
97         return IRQ_HANDLED;
98 }
99
100 static void
101 reset_netjet_s(struct IsdnCardState *cs)
102 {
103         cs->hw.njet.ctrl_reg = 0xff;  /* Reset On */
104         byteout(cs->hw.njet.base + NETJET_CTRL, cs->hw.njet.ctrl_reg);
105         mdelay(10);
106         /* now edge triggered for TJ320 GE 13/07/00 */
107         /* see comment in IRQ function */
108         if (cs->subtyp) /* TJ320 */
109                 cs->hw.njet.ctrl_reg = 0x40;  /* Reset Off and status read clear */
110         else
111                 cs->hw.njet.ctrl_reg = 0x00;  /* Reset Off and status read clear */
112         byteout(cs->hw.njet.base + NETJET_CTRL, cs->hw.njet.ctrl_reg);
113         mdelay(10);
114         cs->hw.njet.auxd = 0;
115         cs->hw.njet.dmactrl = 0;
116         byteout(cs->hw.njet.base + NETJET_AUXCTRL, ~NETJET_ISACIRQ);
117         byteout(cs->hw.njet.base + NETJET_IRQMASK1, NETJET_ISACIRQ);
118         byteout(cs->hw.njet.auxa, cs->hw.njet.auxd);
119 }
120
121 static int
122 NETjet_S_card_msg(struct IsdnCardState *cs, int mt, void *arg)
123 {
124         u_long flags;
125
126         switch (mt) {
127                 case CARD_RESET:
128                         spin_lock_irqsave(&cs->lock, flags);
129                         reset_netjet_s(cs);
130                         spin_unlock_irqrestore(&cs->lock, flags);
131                         return(0);
132                 case CARD_RELEASE:
133                         release_io_netjet(cs);
134                         return(0);
135                 case CARD_INIT:
136                         reset_netjet_s(cs);
137                         inittiger(cs);
138                         spin_lock_irqsave(&cs->lock, flags);
139                         clear_pending_isac_ints(cs);
140                         initisac(cs);
141                         /* Reenable all IRQ */
142                         cs->writeisac(cs, ISAC_MASK, 0);
143                         spin_unlock_irqrestore(&cs->lock, flags);
144                         return(0);
145                 case CARD_TEST:
146                         return(0);
147         }
148         return(0);
149 }
150
151 static struct pci_dev *dev_netjet __devinitdata = NULL;
152
153 int __devinit
154 setup_netjet_s(struct IsdnCard *card)
155 {
156         int bytecnt,cfg;
157         struct IsdnCardState *cs = card->cs;
158         char tmp[64];
159
160 #ifdef __BIG_ENDIAN
161 #error "not running on big endian machines now"
162 #endif
163         strcpy(tmp, NETjet_S_revision);
164         printk(KERN_INFO "HiSax: Traverse Tech. NETjet-S driver Rev. %s\n", HiSax_getrev(tmp));
165         if (cs->typ != ISDN_CTYPE_NETJET_S)
166                 return(0);
167         test_and_clear_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags);
168
169 #ifdef CONFIG_PCI
170
171         for ( ;; )
172         {
173                 if ((dev_netjet = pci_find_device(PCI_VENDOR_ID_TIGERJET,
174                         PCI_DEVICE_ID_TIGERJET_300,  dev_netjet))) {
175                         if (pci_enable_device(dev_netjet))
176                                 return(0);
177                         pci_set_master(dev_netjet);
178                         cs->irq = dev_netjet->irq;
179                         if (!cs->irq) {
180                                 printk(KERN_WARNING "NETjet-S: No IRQ for PCI card found\n");
181                                 return(0);
182                         }
183                         cs->hw.njet.base = pci_resource_start(dev_netjet, 0);
184                         if (!cs->hw.njet.base) {
185                                 printk(KERN_WARNING "NETjet-S: No IO-Adr for PCI card found\n");
186                                 return(0);
187                         }
188                         /* the TJ300 and TJ320 must be detected, the IRQ handling is different
189                          * unfortunatly the chips use the same device ID, but the TJ320 has
190                          * the bit20 in status PCI cfg register set
191                          */
192                         pci_read_config_dword(dev_netjet, 0x04, &cfg);
193                         if (cfg & 0x00100000)
194                                 cs->subtyp = 1; /* TJ320 */
195                         else
196                                 cs->subtyp = 0; /* TJ300 */
197                         /* 2001/10/04 Christoph Ersfeld, Formula-n Europe AG www.formula-n.com */
198                         if ((dev_netjet->subsystem_vendor == 0x55) &&
199                                 (dev_netjet->subsystem_device == 0x02)) {
200                                 printk(KERN_WARNING "Netjet: You tried to load this driver with an incompatible TigerJet-card\n");
201                                 printk(KERN_WARNING "Use type=41 for Formula-n enter:now ISDN PCI and compatible\n");
202                                 return(0);
203                         }
204                         /* end new code */
205                 } else {
206                         printk(KERN_WARNING "NETjet-S: No PCI card found\n");
207                         return(0);
208                 }
209
210                 cs->hw.njet.auxa = cs->hw.njet.base + NETJET_AUXDATA;
211                 cs->hw.njet.isac = cs->hw.njet.base | NETJET_ISAC_OFF;
212
213                 cs->hw.njet.ctrl_reg = 0xff;  /* Reset On */
214                 byteout(cs->hw.njet.base + NETJET_CTRL, cs->hw.njet.ctrl_reg);
215                 mdelay(10);
216
217                 cs->hw.njet.ctrl_reg = 0x00;  /* Reset Off and status read clear */
218                 byteout(cs->hw.njet.base + NETJET_CTRL, cs->hw.njet.ctrl_reg);
219                 mdelay(10);
220
221                 cs->hw.njet.auxd = 0xC0;
222                 cs->hw.njet.dmactrl = 0;
223
224                 byteout(cs->hw.njet.base + NETJET_AUXCTRL, ~NETJET_ISACIRQ);
225                 byteout(cs->hw.njet.base + NETJET_IRQMASK1, NETJET_ISACIRQ);
226                 byteout(cs->hw.njet.auxa, cs->hw.njet.auxd);
227
228                 switch ( ( ( NETjet_ReadIC( cs, ISAC_RBCH ) >> 5 ) & 3 ) )
229                 {
230                         case 0 :
231                                 break;
232
233                         case 3 :
234                                 printk( KERN_WARNING "NETjet-S: NETspider-U PCI card found\n" );
235                                 continue;
236
237                         default :
238                                 printk( KERN_WARNING "NETjet-S: No PCI card found\n" );
239                                 return 0;
240                 }
241                 break;
242         }
243 #else
244
245         printk(KERN_WARNING "NETjet-S: NO_PCI_BIOS\n");
246         printk(KERN_WARNING "NETjet-S: unable to config NETJET-S PCI\n");
247         return (0);
248
249 #endif /* CONFIG_PCI */
250
251         bytecnt = 256;
252
253         printk(KERN_INFO
254                 "NETjet-S: %s card configured at %#lx IRQ %d\n",
255                 cs->subtyp ? "TJ320" : "TJ300", cs->hw.njet.base, cs->irq);
256         if (!request_region(cs->hw.njet.base, bytecnt, "netjet-s isdn")) {
257                 printk(KERN_WARNING
258                        "HiSax: %s config port %#lx-%#lx already in use\n",
259                        CardType[card->typ],
260                        cs->hw.njet.base,
261                        cs->hw.njet.base + bytecnt);
262                 return (0);
263         }
264         cs->readisac  = &NETjet_ReadIC;
265         cs->writeisac = &NETjet_WriteIC;
266         cs->readisacfifo  = &NETjet_ReadICfifo;
267         cs->writeisacfifo = &NETjet_WriteICfifo;
268         cs->BC_Read_Reg  = &dummyrr;
269         cs->BC_Write_Reg = &dummywr;
270         cs->BC_Send_Data = &netjet_fill_dma;
271         setup_isac(cs);
272         cs->cardmsg = &NETjet_S_card_msg;
273         cs->irq_func = &netjet_s_interrupt;
274         cs->irq_flags |= IRQF_SHARED;
275         ISACVersion(cs, "NETjet-S:");
276         return (1);
277 }