nj_s.c revision 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
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/config.h> 9#include <linux/init.h> 10#include "hisax.h" 11#include "isac.h" 12#include "isdnl1.h" 13#include <linux/pci.h> 14#include <linux/interrupt.h> 15#include <linux/ppp_defs.h> 16#include "netjet.h" 17 18const char *NETjet_S_revision = "$Revision: 2.13.2.4 $"; 19 20static u_char dummyrr(struct IsdnCardState *cs, int chan, u_char off) 21{ 22 return(5); 23} 24 25static void dummywr(struct IsdnCardState *cs, int chan, u_char off, u_char value) 26{ 27} 28 29static irqreturn_t 30netjet_s_interrupt(int intno, void *dev_id, struct pt_regs *regs) 31{ 32 struct IsdnCardState *cs = dev_id; 33 u_char val, s1val, s0val; 34 u_long flags; 35 36 spin_lock_irqsave(&cs->lock, flags); 37 s1val = bytein(cs->hw.njet.base + NETJET_IRQSTAT1); 38 if (!(s1val & NETJET_ISACIRQ)) { 39 val = NETjet_ReadIC(cs, ISAC_ISTA); 40 if (cs->debug & L1_DEB_ISAC) 41 debugl1(cs, "tiger: i1 %x %x", s1val, val); 42 if (val) { 43 isac_interrupt(cs, val); 44 NETjet_WriteIC(cs, ISAC_MASK, 0xFF); 45 NETjet_WriteIC(cs, ISAC_MASK, 0x0); 46 } 47 s1val = 1; 48 } else 49 s1val = 0; 50 /* 51 * read/write stat0 is better, because lower IRQ rate 52 * Note the IRQ is on for 125 us if a condition match 53 * thats long on modern CPU and so the IRQ is reentered 54 * all the time. 55 */ 56 s0val = bytein(cs->hw.njet.base + NETJET_IRQSTAT0); 57 if ((s0val | s1val)==0) { // shared IRQ 58 spin_unlock_irqrestore(&cs->lock, flags); 59 return IRQ_NONE; 60 } 61 if (s0val) 62 byteout(cs->hw.njet.base + NETJET_IRQSTAT0, s0val); 63 /* start new code 13/07/00 GE */ 64 /* set bits in sval to indicate which page is free */ 65 if (inl(cs->hw.njet.base + NETJET_DMA_WRITE_ADR) < 66 inl(cs->hw.njet.base + NETJET_DMA_WRITE_IRQ)) 67 /* the 2nd write page is free */ 68 s0val = 0x08; 69 else /* the 1st write page is free */ 70 s0val = 0x04; 71 if (inl(cs->hw.njet.base + NETJET_DMA_READ_ADR) < 72 inl(cs->hw.njet.base + NETJET_DMA_READ_IRQ)) 73 /* the 2nd read page is free */ 74 s0val |= 0x02; 75 else /* the 1st read page is free */ 76 s0val |= 0x01; 77 if (s0val != cs->hw.njet.last_is0) /* we have a DMA interrupt */ 78 { 79 if (test_and_set_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags)) { 80 printk(KERN_WARNING "nj LOCK_ATOMIC s0val %x->%x\n", 81 cs->hw.njet.last_is0, s0val); 82 spin_unlock_irqrestore(&cs->lock, flags); 83 return IRQ_HANDLED; 84 } 85 cs->hw.njet.irqstat0 = s0val; 86 if ((cs->hw.njet.irqstat0 & NETJET_IRQM0_READ) != 87 (cs->hw.njet.last_is0 & NETJET_IRQM0_READ)) 88 /* we have a read dma int */ 89 read_tiger(cs); 90 if ((cs->hw.njet.irqstat0 & NETJET_IRQM0_WRITE) != 91 (cs->hw.njet.last_is0 & NETJET_IRQM0_WRITE)) 92 /* we have a write dma int */ 93 write_tiger(cs); 94 /* end new code 13/07/00 GE */ 95 test_and_clear_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags); 96 } 97 spin_unlock_irqrestore(&cs->lock, flags); 98 return IRQ_HANDLED; 99} 100 101static void 102reset_netjet_s(struct IsdnCardState *cs) 103{ 104 cs->hw.njet.ctrl_reg = 0xff; /* Reset On */ 105 byteout(cs->hw.njet.base + NETJET_CTRL, cs->hw.njet.ctrl_reg); 106 mdelay(10); 107 /* now edge triggered for TJ320 GE 13/07/00 */ 108 /* see comment in IRQ function */ 109 if (cs->subtyp) /* TJ320 */ 110 cs->hw.njet.ctrl_reg = 0x40; /* Reset Off and status read clear */ 111 else 112 cs->hw.njet.ctrl_reg = 0x00; /* Reset Off and status read clear */ 113 byteout(cs->hw.njet.base + NETJET_CTRL, cs->hw.njet.ctrl_reg); 114 mdelay(10); 115 cs->hw.njet.auxd = 0; 116 cs->hw.njet.dmactrl = 0; 117 byteout(cs->hw.njet.base + NETJET_AUXCTRL, ~NETJET_ISACIRQ); 118 byteout(cs->hw.njet.base + NETJET_IRQMASK1, NETJET_ISACIRQ); 119 byteout(cs->hw.njet.auxa, cs->hw.njet.auxd); 120} 121 122static int 123NETjet_S_card_msg(struct IsdnCardState *cs, int mt, void *arg) 124{ 125 u_long flags; 126 127 switch (mt) { 128 case CARD_RESET: 129 spin_lock_irqsave(&cs->lock, flags); 130 reset_netjet_s(cs); 131 spin_unlock_irqrestore(&cs->lock, flags); 132 return(0); 133 case CARD_RELEASE: 134 release_io_netjet(cs); 135 return(0); 136 case CARD_INIT: 137 reset_netjet_s(cs); 138 inittiger(cs); 139 spin_lock_irqsave(&cs->lock, flags); 140 clear_pending_isac_ints(cs); 141 initisac(cs); 142 /* Reenable all IRQ */ 143 cs->writeisac(cs, ISAC_MASK, 0); 144 spin_unlock_irqrestore(&cs->lock, flags); 145 return(0); 146 case CARD_TEST: 147 return(0); 148 } 149 return(0); 150} 151 152static struct pci_dev *dev_netjet __initdata = NULL; 153 154int __init 155setup_netjet_s(struct IsdnCard *card) 156{ 157 int bytecnt,cfg; 158 struct IsdnCardState *cs = card->cs; 159 char tmp[64]; 160 161#ifdef __BIG_ENDIAN 162#error "not running on big endian machines now" 163#endif 164 strcpy(tmp, NETjet_S_revision); 165 printk(KERN_INFO "HiSax: Traverse Tech. NETjet-S driver Rev. %s\n", HiSax_getrev(tmp)); 166 if (cs->typ != ISDN_CTYPE_NETJET_S) 167 return(0); 168 test_and_clear_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags); 169 170#ifdef CONFIG_PCI 171 172 for ( ;; ) 173 { 174 if ((dev_netjet = pci_find_device(PCI_VENDOR_ID_TIGERJET, 175 PCI_DEVICE_ID_TIGERJET_300, dev_netjet))) { 176 if (pci_enable_device(dev_netjet)) 177 return(0); 178 pci_set_master(dev_netjet); 179 cs->irq = dev_netjet->irq; 180 if (!cs->irq) { 181 printk(KERN_WARNING "NETjet-S: No IRQ for PCI card found\n"); 182 return(0); 183 } 184 cs->hw.njet.base = pci_resource_start(dev_netjet, 0); 185 if (!cs->hw.njet.base) { 186 printk(KERN_WARNING "NETjet-S: No IO-Adr for PCI card found\n"); 187 return(0); 188 } 189 /* the TJ300 and TJ320 must be detected, the IRQ handling is different 190 * unfortunatly the chips use the same device ID, but the TJ320 has 191 * the bit20 in status PCI cfg register set 192 */ 193 pci_read_config_dword(dev_netjet, 0x04, &cfg); 194 if (cfg & 0x00100000) 195 cs->subtyp = 1; /* TJ320 */ 196 else 197 cs->subtyp = 0; /* TJ300 */ 198 /* 2001/10/04 Christoph Ersfeld, Formula-n Europe AG www.formula-n.com */ 199 if ((dev_netjet->subsystem_vendor == 0x55) && 200 (dev_netjet->subsystem_device == 0x02)) { 201 printk(KERN_WARNING "Netjet: You tried to load this driver with an incompatible TigerJet-card\n"); 202 printk(KERN_WARNING "Use type=41 for Formula-n enter:now ISDN PCI and compatible\n"); 203 return(0); 204 } 205 /* end new code */ 206 } else { 207 printk(KERN_WARNING "NETjet-S: No PCI card found\n"); 208 return(0); 209 } 210 211 cs->hw.njet.auxa = cs->hw.njet.base + NETJET_AUXDATA; 212 cs->hw.njet.isac = cs->hw.njet.base | NETJET_ISAC_OFF; 213 214 cs->hw.njet.ctrl_reg = 0xff; /* Reset On */ 215 byteout(cs->hw.njet.base + NETJET_CTRL, cs->hw.njet.ctrl_reg); 216 mdelay(10); 217 218 cs->hw.njet.ctrl_reg = 0x00; /* Reset Off and status read clear */ 219 byteout(cs->hw.njet.base + NETJET_CTRL, cs->hw.njet.ctrl_reg); 220 mdelay(10); 221 222 cs->hw.njet.auxd = 0xC0; 223 cs->hw.njet.dmactrl = 0; 224 225 byteout(cs->hw.njet.base + NETJET_AUXCTRL, ~NETJET_ISACIRQ); 226 byteout(cs->hw.njet.base + NETJET_IRQMASK1, NETJET_ISACIRQ); 227 byteout(cs->hw.njet.auxa, cs->hw.njet.auxd); 228 229 switch ( ( ( NETjet_ReadIC( cs, ISAC_RBCH ) >> 5 ) & 3 ) ) 230 { 231 case 0 : 232 break; 233 234 case 3 : 235 printk( KERN_WARNING "NETjet-S: NETspider-U PCI card found\n" ); 236 continue; 237 238 default : 239 printk( KERN_WARNING "NETjet-S: No PCI card found\n" ); 240 return 0; 241 } 242 break; 243 } 244#else 245 246 printk(KERN_WARNING "NETjet-S: NO_PCI_BIOS\n"); 247 printk(KERN_WARNING "NETjet-S: unable to config NETJET-S PCI\n"); 248 return (0); 249 250#endif /* CONFIG_PCI */ 251 252 bytecnt = 256; 253 254 printk(KERN_INFO 255 "NETjet-S: %s card configured at %#lx IRQ %d\n", 256 cs->subtyp ? "TJ320" : "TJ300", cs->hw.njet.base, cs->irq); 257 if (!request_region(cs->hw.njet.base, bytecnt, "netjet-s isdn")) { 258 printk(KERN_WARNING 259 "HiSax: %s config port %#lx-%#lx already in use\n", 260 CardType[card->typ], 261 cs->hw.njet.base, 262 cs->hw.njet.base + bytecnt); 263 return (0); 264 } 265 cs->readisac = &NETjet_ReadIC; 266 cs->writeisac = &NETjet_WriteIC; 267 cs->readisacfifo = &NETjet_ReadICfifo; 268 cs->writeisacfifo = &NETjet_WriteICfifo; 269 cs->BC_Read_Reg = &dummyrr; 270 cs->BC_Write_Reg = &dummywr; 271 cs->BC_Send_Data = &netjet_fill_dma; 272 setup_isac(cs); 273 cs->cardmsg = &NETjet_S_card_msg; 274 cs->irq_func = &netjet_s_interrupt; 275 cs->irq_flags |= SA_SHIRQ; 276 ISACVersion(cs, "NETjet-S:"); 277 return (1); 278} 279