1/* $Id: nj_u.c,v 2.14.2.3 2004/01/13 14:31:26 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 "icc.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_U_revision = "$Revision: 2.14.2.3 $"; 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_u_interrupt(int intno, void *dev_id) 30{ 31 struct IsdnCardState *cs = dev_id; 32 u_char val, sval; 33 u_long flags; 34 35 spin_lock_irqsave(&cs->lock, flags); 36 if (!((sval = bytein(cs->hw.njet.base + NETJET_IRQSTAT1)) & 37 NETJET_ISACIRQ)) { 38 val = NETjet_ReadIC(cs, ICC_ISTA); 39 if (cs->debug & L1_DEB_ISAC) 40 debugl1(cs, "tiger: i1 %x %x", sval, val); 41 if (val) { 42 icc_interrupt(cs, val); 43 NETjet_WriteIC(cs, ICC_MASK, 0xFF); 44 NETjet_WriteIC(cs, ICC_MASK, 0x0); 45 } 46 } 47 /* start new code 13/07/00 GE */ 48 /* set bits in sval to indicate which page is free */ 49 if (inl(cs->hw.njet.base + NETJET_DMA_WRITE_ADR) < 50 inl(cs->hw.njet.base + NETJET_DMA_WRITE_IRQ)) 51 /* the 2nd write page is free */ 52 sval = 0x08; 53 else /* the 1st write page is free */ 54 sval = 0x04; 55 if (inl(cs->hw.njet.base + NETJET_DMA_READ_ADR) < 56 inl(cs->hw.njet.base + NETJET_DMA_READ_IRQ)) 57 /* the 2nd read page is free */ 58 sval = sval | 0x02; 59 else /* the 1st read page is free */ 60 sval = sval | 0x01; 61 if (sval != cs->hw.njet.last_is0) /* we have a DMA interrupt */ 62 { 63 if (test_and_set_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags)) { 64 spin_unlock_irqrestore(&cs->lock, flags); 65 return IRQ_HANDLED; 66 } 67 cs->hw.njet.irqstat0 = sval; 68 if ((cs->hw.njet.irqstat0 & NETJET_IRQM0_READ) != 69 (cs->hw.njet.last_is0 & NETJET_IRQM0_READ)) 70 /* we have a read dma int */ 71 read_tiger(cs); 72 if ((cs->hw.njet.irqstat0 & NETJET_IRQM0_WRITE) != 73 (cs->hw.njet.last_is0 & NETJET_IRQM0_WRITE)) 74 /* we have a write dma int */ 75 write_tiger(cs); 76 /* end new code 13/07/00 GE */ 77 test_and_clear_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags); 78 } 79 spin_unlock_irqrestore(&cs->lock, flags); 80 return IRQ_HANDLED; 81} 82 83static void 84reset_netjet_u(struct IsdnCardState *cs) 85{ 86 cs->hw.njet.ctrl_reg = 0xff; /* Reset On */ 87 byteout(cs->hw.njet.base + NETJET_CTRL, cs->hw.njet.ctrl_reg); 88 mdelay(10); 89 cs->hw.njet.ctrl_reg = 0x40; /* Reset Off and status read clear */ 90 /* now edge triggered for TJ320 GE 13/07/00 */ 91 byteout(cs->hw.njet.base + NETJET_CTRL, cs->hw.njet.ctrl_reg); 92 mdelay(10); 93 cs->hw.njet.auxd = 0xC0; 94 cs->hw.njet.dmactrl = 0; 95 byteout(cs->hw.njet.auxa, 0); 96 byteout(cs->hw.njet.base + NETJET_AUXCTRL, ~NETJET_ISACIRQ); 97 byteout(cs->hw.njet.base + NETJET_IRQMASK1, NETJET_ISACIRQ); 98 byteout(cs->hw.njet.auxa, cs->hw.njet.auxd); 99} 100 101static int 102NETjet_U_card_msg(struct IsdnCardState *cs, int mt, void *arg) 103{ 104 u_long flags; 105 106 switch (mt) { 107 case CARD_RESET: 108 spin_lock_irqsave(&cs->lock, flags); 109 reset_netjet_u(cs); 110 spin_unlock_irqrestore(&cs->lock, flags); 111 return (0); 112 case CARD_RELEASE: 113 release_io_netjet(cs); 114 return (0); 115 case CARD_INIT: 116 spin_lock_irqsave(&cs->lock, flags); 117 inittiger(cs); 118 reset_netjet_u(cs); 119 clear_pending_icc_ints(cs); 120 initicc(cs); 121 /* Reenable all IRQ */ 122 cs->writeisac(cs, ICC_MASK, 0); 123 spin_unlock_irqrestore(&cs->lock, flags); 124 return (0); 125 case CARD_TEST: 126 return (0); 127 } 128 return (0); 129} 130 131static int nju_pci_probe(struct pci_dev *dev_netjet, struct IsdnCardState *cs) 132{ 133 if (pci_enable_device(dev_netjet)) 134 return (0); 135 pci_set_master(dev_netjet); 136 cs->irq = dev_netjet->irq; 137 if (!cs->irq) { 138 printk(KERN_WARNING "NETspider-U: No IRQ for PCI card found\n"); 139 return (0); 140 } 141 cs->hw.njet.base = pci_resource_start(dev_netjet, 0); 142 if (!cs->hw.njet.base) { 143 printk(KERN_WARNING "NETspider-U: No IO-Adr for PCI card found\n"); 144 return (0); 145 } 146 147 return (1); 148} 149 150static int nju_cs_init(struct IsdnCard *card, struct IsdnCardState *cs) 151{ 152 cs->hw.njet.auxa = cs->hw.njet.base + NETJET_AUXDATA; 153 cs->hw.njet.isac = cs->hw.njet.base | NETJET_ISAC_OFF; 154 mdelay(10); 155 156 cs->hw.njet.ctrl_reg = 0xff; /* Reset On */ 157 byteout(cs->hw.njet.base + NETJET_CTRL, cs->hw.njet.ctrl_reg); 158 mdelay(10); 159 160 cs->hw.njet.ctrl_reg = 0x00; /* Reset Off and status read clear */ 161 byteout(cs->hw.njet.base + NETJET_CTRL, cs->hw.njet.ctrl_reg); 162 mdelay(10); 163 164 cs->hw.njet.auxd = 0xC0; 165 cs->hw.njet.dmactrl = 0; 166 167 byteout(cs->hw.njet.auxa, 0); 168 byteout(cs->hw.njet.base + NETJET_AUXCTRL, ~NETJET_ISACIRQ); 169 byteout(cs->hw.njet.base + NETJET_IRQMASK1, NETJET_ISACIRQ); 170 byteout(cs->hw.njet.auxa, cs->hw.njet.auxd); 171 172 switch (((NETjet_ReadIC(cs, ICC_RBCH) >> 5) & 3)) 173 { 174 case 3: 175 return 1; /* end loop */ 176 177 case 0: 178 printk(KERN_WARNING "NETspider-U: NETjet-S PCI card found\n"); 179 return -1; /* continue looping */ 180 181 default: 182 printk(KERN_WARNING "NETspider-U: No PCI card found\n"); 183 return 0; /* end loop & function */ 184 } 185 return 1; /* end loop */ 186} 187 188static int nju_cs_init_rest(struct IsdnCard *card, struct IsdnCardState *cs) 189{ 190 const int bytecnt = 256; 191 192 printk(KERN_INFO 193 "NETspider-U: PCI card configured at %#lx IRQ %d\n", 194 cs->hw.njet.base, cs->irq); 195 if (!request_region(cs->hw.njet.base, bytecnt, "netspider-u isdn")) { 196 printk(KERN_WARNING 197 "HiSax: NETspider-U config port %#lx-%#lx " 198 "already in use\n", 199 cs->hw.njet.base, 200 cs->hw.njet.base + bytecnt); 201 return (0); 202 } 203 setup_icc(cs); 204 cs->readisac = &NETjet_ReadIC; 205 cs->writeisac = &NETjet_WriteIC; 206 cs->readisacfifo = &NETjet_ReadICfifo; 207 cs->writeisacfifo = &NETjet_WriteICfifo; 208 cs->BC_Read_Reg = &dummyrr; 209 cs->BC_Write_Reg = &dummywr; 210 cs->BC_Send_Data = &netjet_fill_dma; 211 cs->cardmsg = &NETjet_U_card_msg; 212 cs->irq_func = &netjet_u_interrupt; 213 cs->irq_flags |= IRQF_SHARED; 214 ICCVersion(cs, "NETspider-U:"); 215 216 return (1); 217} 218 219static struct pci_dev *dev_netjet = NULL; 220 221int setup_netjet_u(struct IsdnCard *card) 222{ 223 int ret; 224 struct IsdnCardState *cs = card->cs; 225 char tmp[64]; 226 227#ifdef __BIG_ENDIAN 228#error "not running on big endian machines now" 229#endif 230 231 strcpy(tmp, NETjet_U_revision); 232 printk(KERN_INFO "HiSax: Traverse Tech. NETspider-U driver Rev. %s\n", HiSax_getrev(tmp)); 233 if (cs->typ != ISDN_CTYPE_NETJET_U) 234 return (0); 235 test_and_clear_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags); 236 237 for (;;) 238 { 239 if ((dev_netjet = hisax_find_pci_device(PCI_VENDOR_ID_TIGERJET, 240 PCI_DEVICE_ID_TIGERJET_300, dev_netjet))) { 241 ret = nju_pci_probe(dev_netjet, cs); 242 if (!ret) 243 return (0); 244 } else { 245 printk(KERN_WARNING "NETspider-U: No PCI card found\n"); 246 return (0); 247 } 248 249 ret = nju_cs_init(card, cs); 250 if (!ret) 251 return (0); 252 if (ret > 0) 253 break; 254 /* ret < 0 == continue looping */ 255 } 256 257 return nju_cs_init_rest(card, cs); 258} 259