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
dummyrr(struct IsdnCardState * cs,int chan,u_char off)19 static u_char dummyrr(struct IsdnCardState *cs, int chan, u_char off)
20 {
21 return(5);
22 }
23
dummywr(struct IsdnCardState * cs,int chan,u_char off,u_char value)24 static void dummywr(struct IsdnCardState *cs, int chan, u_char off, u_char value)
25 {
26 }
27
28 static irqreturn_t
netjet_s_interrupt(int intno,void * dev_id)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
reset_netjet_s(struct IsdnCardState * cs)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
NETjet_S_card_msg(struct IsdnCardState * cs,int mt,void * arg)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
njs_pci_probe(struct pci_dev * dev_netjet,struct IsdnCardState * cs)151 static int __devinit njs_pci_probe(struct pci_dev *dev_netjet,
152 struct IsdnCardState *cs)
153 {
154 u32 cfg;
155
156 if (pci_enable_device(dev_netjet))
157 return(0);
158 pci_set_master(dev_netjet);
159 cs->irq = dev_netjet->irq;
160 if (!cs->irq) {
161 printk(KERN_WARNING "NETjet-S: No IRQ for PCI card found\n");
162 return(0);
163 }
164 cs->hw.njet.base = pci_resource_start(dev_netjet, 0);
165 if (!cs->hw.njet.base) {
166 printk(KERN_WARNING "NETjet-S: No IO-Adr for PCI card found\n");
167 return(0);
168 }
169 /* the TJ300 and TJ320 must be detected, the IRQ handling is different
170 * unfortunatly the chips use the same device ID, but the TJ320 has
171 * the bit20 in status PCI cfg register set
172 */
173 pci_read_config_dword(dev_netjet, 0x04, &cfg);
174 if (cfg & 0x00100000)
175 cs->subtyp = 1; /* TJ320 */
176 else
177 cs->subtyp = 0; /* TJ300 */
178 /* 2001/10/04 Christoph Ersfeld, Formula-n Europe AG www.formula-n.com */
179 if ((dev_netjet->subsystem_vendor == 0x55) &&
180 (dev_netjet->subsystem_device == 0x02)) {
181 printk(KERN_WARNING "Netjet: You tried to load this driver with an incompatible TigerJet-card\n");
182 printk(KERN_WARNING "Use type=41 for Formula-n enter:now ISDN PCI and compatible\n");
183 return(0);
184 }
185 /* end new code */
186
187 return(1);
188 }
189
njs_cs_init(struct IsdnCard * card,struct IsdnCardState * cs)190 static int __devinit njs_cs_init(struct IsdnCard *card,
191 struct IsdnCardState *cs)
192 {
193
194 cs->hw.njet.auxa = cs->hw.njet.base + NETJET_AUXDATA;
195 cs->hw.njet.isac = cs->hw.njet.base | NETJET_ISAC_OFF;
196
197 cs->hw.njet.ctrl_reg = 0xff; /* Reset On */
198 byteout(cs->hw.njet.base + NETJET_CTRL, cs->hw.njet.ctrl_reg);
199 mdelay(10);
200
201 cs->hw.njet.ctrl_reg = 0x00; /* Reset Off and status read clear */
202 byteout(cs->hw.njet.base + NETJET_CTRL, cs->hw.njet.ctrl_reg);
203 mdelay(10);
204
205 cs->hw.njet.auxd = 0xC0;
206 cs->hw.njet.dmactrl = 0;
207
208 byteout(cs->hw.njet.base + NETJET_AUXCTRL, ~NETJET_ISACIRQ);
209 byteout(cs->hw.njet.base + NETJET_IRQMASK1, NETJET_ISACIRQ);
210 byteout(cs->hw.njet.auxa, cs->hw.njet.auxd);
211
212 switch ( ( ( NETjet_ReadIC( cs, ISAC_RBCH ) >> 5 ) & 3 ) )
213 {
214 case 0 :
215 return 1; /* end loop */
216
217 case 3 :
218 printk( KERN_WARNING "NETjet-S: NETspider-U PCI card found\n" );
219 return -1; /* continue looping */
220
221 default :
222 printk( KERN_WARNING "NETjet-S: No PCI card found\n" );
223 return 0; /* end loop & function */
224 }
225 return 1; /* end loop */
226 }
227
njs_cs_init_rest(struct IsdnCard * card,struct IsdnCardState * cs)228 static int __devinit njs_cs_init_rest(struct IsdnCard *card,
229 struct IsdnCardState *cs)
230 {
231 const int bytecnt = 256;
232
233 printk(KERN_INFO
234 "NETjet-S: %s card configured at %#lx IRQ %d\n",
235 cs->subtyp ? "TJ320" : "TJ300", cs->hw.njet.base, cs->irq);
236 if (!request_region(cs->hw.njet.base, bytecnt, "netjet-s isdn")) {
237 printk(KERN_WARNING
238 "HiSax: NETjet-S config port %#lx-%#lx already in use\n",
239 cs->hw.njet.base,
240 cs->hw.njet.base + bytecnt);
241 return (0);
242 }
243 cs->readisac = &NETjet_ReadIC;
244 cs->writeisac = &NETjet_WriteIC;
245 cs->readisacfifo = &NETjet_ReadICfifo;
246 cs->writeisacfifo = &NETjet_WriteICfifo;
247 cs->BC_Read_Reg = &dummyrr;
248 cs->BC_Write_Reg = &dummywr;
249 cs->BC_Send_Data = &netjet_fill_dma;
250 setup_isac(cs);
251 cs->cardmsg = &NETjet_S_card_msg;
252 cs->irq_func = &netjet_s_interrupt;
253 cs->irq_flags |= IRQF_SHARED;
254 ISACVersion(cs, "NETjet-S:");
255
256 return (1);
257 }
258
259 static struct pci_dev *dev_netjet __devinitdata = NULL;
260
261 int __devinit
setup_netjet_s(struct IsdnCard * card)262 setup_netjet_s(struct IsdnCard *card)
263 {
264 int ret;
265 struct IsdnCardState *cs = card->cs;
266 char tmp[64];
267
268 #ifdef __BIG_ENDIAN
269 #error "not running on big endian machines now"
270 #endif
271 strcpy(tmp, NETjet_S_revision);
272 printk(KERN_INFO "HiSax: Traverse Tech. NETjet-S driver Rev. %s\n", HiSax_getrev(tmp));
273 if (cs->typ != ISDN_CTYPE_NETJET_S)
274 return(0);
275 test_and_clear_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags);
276
277 for ( ;; )
278 {
279 if ((dev_netjet = pci_find_device(PCI_VENDOR_ID_TIGERJET,
280 PCI_DEVICE_ID_TIGERJET_300, dev_netjet))) {
281 ret = njs_pci_probe(dev_netjet, cs);
282 if (!ret)
283 return(0);
284 } else {
285 printk(KERN_WARNING "NETjet-S: No PCI card found\n");
286 return(0);
287 }
288
289 ret = njs_cs_init(card, cs);
290 if (!ret)
291 return(0);
292 if (ret > 0)
293 break;
294 /* otherwise, ret < 0, continue looping */
295 }
296
297 return njs_cs_init_rest(card, cs);
298 }
299