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 17static const char *NETjet_S_revision = "$Revision: 2.13.2.4 $"; 18 19static u_char dummyrr(struct IsdnCardState *cs, int chan, u_char off) 20{ 21 return (5); 22} 23 24static void dummywr(struct IsdnCardState *cs, int chan, u_char off, u_char value) 25{ 26} 27 28static irqreturn_t 29netjet_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 100static void 101reset_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 121static int 122NETjet_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 151static 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 * unfortunately 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 190static 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 228static 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 259static struct pci_dev *dev_netjet __devinitdata = NULL; 260 261int __devinit 262setup_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 = hisax_find_pci_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