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1da177e4 LT |
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 | ||
1da177e4 LT |
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 | ||
672c3fd9 | 17 | static const char *NETjet_S_revision = "$Revision: 2.13.2.4 $"; |
1da177e4 LT |
18 | |
19 | static u_char dummyrr(struct IsdnCardState *cs, int chan, u_char off) | |
20 | { | |
475be4d8 | 21 | return (5); |
1da177e4 LT |
22 | } |
23 | ||
24 | static void dummywr(struct IsdnCardState *cs, int chan, u_char off, u_char value) | |
25 | { | |
26 | } | |
27 | ||
28 | static irqreturn_t | |
7d12e780 | 29 | netjet_s_interrupt(int intno, void *dev_id) |
1da177e4 LT |
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; | |
475be4d8 | 49 | /* |
1da177e4 LT |
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); | |
475be4d8 | 56 | if ((s0val | s1val) == 0) { // shared IRQ |
1da177e4 LT |
57 | spin_unlock_irqrestore(&cs->lock, flags); |
58 | return IRQ_NONE; | |
475be4d8 | 59 | } |
1da177e4 LT |
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) < | |
475be4d8 | 65 | inl(cs->hw.njet.base + NETJET_DMA_WRITE_IRQ)) |
1da177e4 LT |
66 | /* the 2nd write page is free */ |
67 | s0val = 0x08; | |
68 | else /* the 1st write page is free */ | |
475be4d8 | 69 | s0val = 0x04; |
1da177e4 | 70 | if (inl(cs->hw.njet.base + NETJET_DMA_READ_ADR) < |
475be4d8 | 71 | inl(cs->hw.njet.base + NETJET_DMA_READ_IRQ)) |
1da177e4 LT |
72 | /* the 2nd read page is free */ |
73 | s0val |= 0x02; | |
74 | else /* the 1st read page is free */ | |
475be4d8 | 75 | s0val |= 0x01; |
1da177e4 LT |
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", | |
475be4d8 | 80 | cs->hw.njet.last_is0, s0val); |
1da177e4 LT |
81 | spin_unlock_irqrestore(&cs->lock, flags); |
82 | return IRQ_HANDLED; | |
83 | } | |
84 | cs->hw.njet.irqstat0 = s0val; | |
475be4d8 JP |
85 | if ((cs->hw.njet.irqstat0 & NETJET_IRQM0_READ) != |
86 | (cs->hw.njet.last_is0 & NETJET_IRQM0_READ)) | |
1da177e4 LT |
87 | /* we have a read dma int */ |
88 | read_tiger(cs); | |
89 | if ((cs->hw.njet.irqstat0 & NETJET_IRQM0_WRITE) != | |
475be4d8 | 90 | (cs->hw.njet.last_is0 & NETJET_IRQM0_WRITE)) |
1da177e4 LT |
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) { | |
475be4d8 JP |
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); | |
1da177e4 | 147 | } |
475be4d8 | 148 | return (0); |
1da177e4 LT |
149 | } |
150 | ||
ed5a84cd | 151 | static int njs_pci_probe(struct pci_dev *dev_netjet, struct IsdnCardState *cs) |
1da177e4 | 152 | { |
b4482a4b | 153 | u32 cfg; |
1da177e4 | 154 | |
0566a663 | 155 | if (pci_enable_device(dev_netjet)) |
475be4d8 | 156 | return (0); |
0566a663 JG |
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"); | |
475be4d8 | 161 | return (0); |
0566a663 JG |
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"); | |
475be4d8 | 166 | return (0); |
0566a663 JG |
167 | } |
168 | /* the TJ300 and TJ320 must be detected, the IRQ handling is different | |
25985edc | 169 | * unfortunately the chips use the same device ID, but the TJ320 has |
0566a663 JG |
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) && | |
475be4d8 | 179 | (dev_netjet->subsystem_device == 0x02)) { |
0566a663 JG |
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"); | |
475be4d8 | 182 | return (0); |
0566a663 JG |
183 | } |
184 | /* end new code */ | |
1da177e4 | 185 | |
475be4d8 | 186 | return (1); |
0566a663 | 187 | } |
1da177e4 | 188 | |
ed5a84cd | 189 | static int njs_cs_init(struct IsdnCard *card, struct IsdnCardState *cs) |
0566a663 | 190 | { |
1da177e4 | 191 | |
0566a663 JG |
192 | cs->hw.njet.auxa = cs->hw.njet.base + NETJET_AUXDATA; |
193 | cs->hw.njet.isac = cs->hw.njet.base | NETJET_ISAC_OFF; | |
1da177e4 | 194 | |
0566a663 JG |
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); | |
1da177e4 | 198 | |
0566a663 JG |
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); | |
1da177e4 | 202 | |
0566a663 JG |
203 | cs->hw.njet.auxd = 0xC0; |
204 | cs->hw.njet.dmactrl = 0; | |
1da177e4 | 205 | |
0566a663 JG |
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); | |
1da177e4 | 209 | |
475be4d8 | 210 | switch (((NETjet_ReadIC(cs, ISAC_RBCH) >> 5) & 3)) |
0566a663 | 211 | { |
475be4d8 JP |
212 | case 0: |
213 | return 1; /* end loop */ | |
1da177e4 | 214 | |
475be4d8 JP |
215 | case 3: |
216 | printk(KERN_WARNING "NETjet-S: NETspider-U PCI card found\n"); | |
217 | return -1; /* continue looping */ | |
1da177e4 | 218 | |
475be4d8 JP |
219 | default: |
220 | printk(KERN_WARNING "NETjet-S: No PCI card found\n"); | |
221 | return 0; /* end loop & function */ | |
1da177e4 | 222 | } |
0566a663 JG |
223 | return 1; /* end loop */ |
224 | } | |
1da177e4 | 225 | |
ed5a84cd | 226 | static int njs_cs_init_rest(struct IsdnCard *card, struct IsdnCardState *cs) |
0566a663 JG |
227 | { |
228 | const int bytecnt = 256; | |
1da177e4 LT |
229 | |
230 | printk(KERN_INFO | |
475be4d8 JP |
231 | "NETjet-S: %s card configured at %#lx IRQ %d\n", |
232 | cs->subtyp ? "TJ320" : "TJ300", cs->hw.njet.base, cs->irq); | |
1da177e4 LT |
233 | if (!request_region(cs->hw.njet.base, bytecnt, "netjet-s isdn")) { |
234 | printk(KERN_WARNING | |
8349304d | 235 | "HiSax: NETjet-S config port %#lx-%#lx already in use\n", |
1da177e4 LT |
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; | |
9ba02bec | 250 | cs->irq_flags |= IRQF_SHARED; |
1da177e4 | 251 | ISACVersion(cs, "NETjet-S:"); |
0566a663 | 252 | |
1da177e4 LT |
253 | return (1); |
254 | } | |
0566a663 | 255 | |
ed5a84cd | 256 | static struct pci_dev *dev_netjet = NULL; |
0566a663 | 257 | |
ed5a84cd | 258 | int setup_netjet_s(struct IsdnCard *card) |
0566a663 JG |
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) | |
475be4d8 | 270 | return (0); |
0566a663 JG |
271 | test_and_clear_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags); |
272 | ||
475be4d8 | 273 | for (;;) |
0566a663 | 274 | { |
41a68a74 | 275 | if ((dev_netjet = hisax_find_pci_device(PCI_VENDOR_ID_TIGERJET, |
475be4d8 | 276 | PCI_DEVICE_ID_TIGERJET_300, dev_netjet))) { |
0566a663 JG |
277 | ret = njs_pci_probe(dev_netjet, cs); |
278 | if (!ret) | |
475be4d8 | 279 | return (0); |
0566a663 JG |
280 | } else { |
281 | printk(KERN_WARNING "NETjet-S: No PCI card found\n"); | |
475be4d8 | 282 | return (0); |
0566a663 JG |
283 | } |
284 | ||
285 | ret = njs_cs_init(card, cs); | |
286 | if (!ret) | |
475be4d8 | 287 | return (0); |
0566a663 JG |
288 | if (ret > 0) |
289 | break; | |
290 | /* otherwise, ret < 0, continue looping */ | |
291 | } | |
292 | ||
293 | return njs_cs_init_rest(card, cs); | |
294 | } |