/* $Id: nj_s.c,v 2.13.2.4 2004/01/16 01:53:48 keil Exp $ * * This software may be used and distributed according to the terms * of the GNU General Public License, incorporated herein by reference. * */ #include <linux/init.h> #include "hisax.h" #include "isac.h" #include "isdnl1.h" #include <linux/pci.h> #include <linux/interrupt.h> #include <linux/ppp_defs.h> #include "netjet.h" static const char *NETjet_S_revision = "$Revision: 2.13.2.4 $"; static u_char dummyrr(struct IsdnCardState *cs, int chan, u_char off) { return(5); } static void dummywr(struct IsdnCardState *cs, int chan, u_char off, u_char value) { } static irqreturn_t netjet_s_interrupt(int intno, void *dev_id) { struct IsdnCardState *cs = dev_id; u_char val, s1val, s0val; u_long flags; spin_lock_irqsave(&cs->lock, flags); s1val = bytein(cs->hw.njet.base + NETJET_IRQSTAT1); if (!(s1val & NETJET_ISACIRQ)) { val = NETjet_ReadIC(cs, ISAC_ISTA); if (cs->debug & L1_DEB_ISAC) debugl1(cs, "tiger: i1 %x %x", s1val, val); if (val) { isac_interrupt(cs, val); NETjet_WriteIC(cs, ISAC_MASK, 0xFF); NETjet_WriteIC(cs, ISAC_MASK, 0x0); } s1val = 1; } else s1val = 0; /* * read/write stat0 is better, because lower IRQ rate * Note the IRQ is on for 125 us if a condition match * thats long on modern CPU and so the IRQ is reentered * all the time. */ s0val = bytein(cs->hw.njet.base + NETJET_IRQSTAT0); if ((s0val | s1val)==0) { // shared IRQ spin_unlock_irqrestore(&cs->lock, flags); return IRQ_NONE; } if (s0val) byteout(cs->hw.njet.base + NETJET_IRQSTAT0, s0val); /* start new code 13/07/00 GE */ /* set bits in sval to indicate which page is free */ if (inl(cs->hw.njet.base + NETJET_DMA_WRITE_ADR) < inl(cs->hw.njet.base + NETJET_DMA_WRITE_IRQ)) /* the 2nd write page is free */ s0val = 0x08; else /* the 1st write page is free */ s0val = 0x04; if (inl(cs->hw.njet.base + NETJET_DMA_READ_ADR) < inl(cs->hw.njet.base + NETJET_DMA_READ_IRQ)) /* the 2nd read page is free */ s0val |= 0x02; else /* the 1st read page is free */ s0val |= 0x01; if (s0val != cs->hw.njet.last_is0) /* we have a DMA interrupt */ { if (test_and_set_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags)) { printk(KERN_WARNING "nj LOCK_ATOMIC s0val %x->%x\n", cs->hw.njet.last_is0, s0val); spin_unlock_irqrestore(&cs->lock, flags); return IRQ_HANDLED; } cs->hw.njet.irqstat0 = s0val; if ((cs->hw.njet.irqstat0 & NETJET_IRQM0_READ) != (cs->hw.njet.last_is0 & NETJET_IRQM0_READ)) /* we have a read dma int */ read_tiger(cs); if ((cs->hw.njet.irqstat0 & NETJET_IRQM0_WRITE) != (cs->hw.njet.last_is0 & NETJET_IRQM0_WRITE)) /* we have a write dma int */ write_tiger(cs); /* end new code 13/07/00 GE */ test_and_clear_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags); } spin_unlock_irqrestore(&cs->lock, flags); return IRQ_HANDLED; } static void reset_netjet_s(struct IsdnCardState *cs) { cs->hw.njet.ctrl_reg = 0xff; /* Reset On */ byteout(cs->hw.njet.base + NETJET_CTRL, cs->hw.njet.ctrl_reg); mdelay(10); /* now edge triggered for TJ320 GE 13/07/00 */ /* see comment in IRQ function */ if (cs->subtyp) /* TJ320 */ cs->hw.njet.ctrl_reg = 0x40; /* Reset Off and status read clear */ else cs->hw.njet.ctrl_reg = 0x00; /* Reset Off and status read clear */ byteout(cs->hw.njet.base + NETJET_CTRL, cs->hw.njet.ctrl_reg); mdelay(10); cs->hw.njet.auxd = 0; cs->hw.njet.dmactrl = 0; byteout(cs->hw.njet.base + NETJET_AUXCTRL, ~NETJET_ISACIRQ); byteout(cs->hw.njet.base + NETJET_IRQMASK1, NETJET_ISACIRQ); byteout(cs->hw.njet.auxa, cs->hw.njet.auxd); } static int NETjet_S_card_msg(struct IsdnCardState *cs, int mt, void *arg) { u_long flags; switch (mt) { case CARD_RESET: spin_lock_irqsave(&cs->lock, flags); reset_netjet_s(cs); spin_unlock_irqrestore(&cs->lock, flags); return(0); case CARD_RELEASE: release_io_netjet(cs); return(0); case CARD_INIT: reset_netjet_s(cs); inittiger(cs); spin_lock_irqsave(&cs->lock, flags); clear_pending_isac_ints(cs); initisac(cs); /* Reenable all IRQ */ cs->writeisac(cs, ISAC_MASK, 0); spin_unlock_irqrestore(&cs->lock, flags); return(0); case CARD_TEST: return(0); } return(0); } static int __devinit njs_pci_probe(struct pci_dev *dev_netjet, struct IsdnCardState *cs) { u32 cfg; if (pci_enable_device(dev_netjet)) return(0); pci_set_master(dev_netjet); cs->irq = dev_netjet->irq; if (!cs->irq) { printk(KERN_WARNING "NETjet-S: No IRQ for PCI card found\n"); return(0); } cs->hw.njet.base = pci_resource_start(dev_netjet, 0); if (!cs->hw.njet.base) { printk(KERN_WARNING "NETjet-S: No IO-Adr for PCI card found\n"); return(0); } /* the TJ300 and TJ320 must be detected, the IRQ handling is different * unfortunatly the chips use the same device ID, but the TJ320 has * the bit20 in status PCI cfg register set */ pci_read_config_dword(dev_netjet, 0x04, &cfg); if (cfg & 0x00100000) cs->subtyp = 1; /* TJ320 */ else cs->subtyp = 0; /* TJ300 */ /* 2001/10/04 Christoph Ersfeld, Formula-n Europe AG www.formula-n.com */ if ((dev_netjet->subsystem_vendor == 0x55) && (dev_netjet->subsystem_device == 0x02)) { printk(KERN_WARNING "Netjet: You tried to load this driver with an incompatible TigerJet-card\n"); printk(KERN_WARNING "Use type=41 for Formula-n enter:now ISDN PCI and compatible\n"); return(0); } /* end new code */ return(1); } static int __devinit njs_cs_init(struct IsdnCard *card, struct IsdnCardState *cs) { cs->hw.njet.auxa = cs->hw.njet.base + NETJET_AUXDATA; cs->hw.njet.isac = cs->hw.njet.base | NETJET_ISAC_OFF; cs->hw.njet.ctrl_reg = 0xff; /* Reset On */ byteout(cs->hw.njet.base + NETJET_CTRL, cs->hw.njet.ctrl_reg); mdelay(10); cs->hw.njet.ctrl_reg = 0x00; /* Reset Off and status read clear */ byteout(cs->hw.njet.base + NETJET_CTRL, cs->hw.njet.ctrl_reg); mdelay(10); cs->hw.njet.auxd = 0xC0; cs->hw.njet.dmactrl = 0; byteout(cs->hw.njet.base + NETJET_AUXCTRL, ~NETJET_ISACIRQ); byteout(cs->hw.njet.base + NETJET_IRQMASK1, NETJET_ISACIRQ); byteout(cs->hw.njet.auxa, cs->hw.njet.auxd); switch ( ( ( NETjet_ReadIC( cs, ISAC_RBCH ) >> 5 ) & 3 ) ) { case 0 : return 1; /* end loop */ case 3 : printk( KERN_WARNING "NETjet-S: NETspider-U PCI card found\n" ); return -1; /* continue looping */ default : printk( KERN_WARNING "NETjet-S: No PCI card found\n" ); return 0; /* end loop & function */ } return 1; /* end loop */ } static int __devinit njs_cs_init_rest(struct IsdnCard *card, struct IsdnCardState *cs) { const int bytecnt = 256; printk(KERN_INFO "NETjet-S: %s card configured at %#lx IRQ %d\n", cs->subtyp ? "TJ320" : "TJ300", cs->hw.njet.base, cs->irq); if (!request_region(cs->hw.njet.base, bytecnt, "netjet-s isdn")) { printk(KERN_WARNING "HiSax: NETjet-S config port %#lx-%#lx already in use\n", cs->hw.njet.base, cs->hw.njet.base + bytecnt); return (0); } cs->readisac = &NETjet_ReadIC; cs->writeisac = &NETjet_WriteIC; cs->readisacfifo = &NETjet_ReadICfifo; cs->writeisacfifo = &NETjet_WriteICfifo; cs->BC_Read_Reg = &dummyrr; cs->BC_Write_Reg = &dummywr; cs->BC_Send_Data = &netjet_fill_dma; setup_isac(cs); cs->cardmsg = &NETjet_S_card_msg; cs->irq_func = &netjet_s_interrupt; cs->irq_flags |= IRQF_SHARED; ISACVersion(cs, "NETjet-S:"); return (1); } static struct pci_dev *dev_netjet __devinitdata = NULL; int __devinit setup_netjet_s(struct IsdnCard *card) { int ret; struct IsdnCardState *cs = card->cs; char tmp[64]; #ifdef __BIG_ENDIAN #error "not running on big endian machines now" #endif strcpy(tmp, NETjet_S_revision); printk(KERN_INFO "HiSax: Traverse Tech. NETjet-S driver Rev. %s\n", HiSax_getrev(tmp)); if (cs->typ != ISDN_CTYPE_NETJET_S) return(0); test_and_clear_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags); for ( ;; ) { if ((dev_netjet = pci_find_device(PCI_VENDOR_ID_TIGERJET, PCI_DEVICE_ID_TIGERJET_300, dev_netjet))) { ret = njs_pci_probe(dev_netjet, cs); if (!ret) return(0); } else { printk(KERN_WARNING "NETjet-S: No PCI card found\n"); return(0); } ret = njs_cs_init(card, cs); if (!ret) return(0); if (ret > 0) break; /* otherwise, ret < 0, continue looping */ } return njs_cs_init_rest(card, cs); }