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