diff options
Diffstat (limited to 'drivers/isdn/hisax/nj_s.c')
| -rw-r--r-- | drivers/isdn/hisax/nj_s.c | 278 |
1 files changed, 278 insertions, 0 deletions
diff --git a/drivers/isdn/hisax/nj_s.c b/drivers/isdn/hisax/nj_s.c new file mode 100644 index 00000000000..fd664697f82 --- /dev/null +++ b/drivers/isdn/hisax/nj_s.c @@ -0,0 +1,278 @@ +/* $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/config.h> +#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" + +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 pt_regs *regs) +{ + 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 struct pci_dev *dev_netjet __initdata = NULL; + +int __init +setup_netjet_s(struct IsdnCard *card) +{ + int bytecnt,cfg; + 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); + +#ifdef CONFIG_PCI + + for ( ;; ) + { + if ((dev_netjet = pci_find_device(PCI_VENDOR_ID_TIGERJET, + PCI_DEVICE_ID_TIGERJET_300, dev_netjet))) { + 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 */ + } else { + printk(KERN_WARNING "NETjet-S: No PCI card found\n"); + return(0); + } + + 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 : + break; + + case 3 : + printk( KERN_WARNING "NETjet-S: NETspider-U PCI card found\n" ); + continue; + + default : + printk( KERN_WARNING "NETjet-S: No PCI card found\n" ); + return 0; + } + break; + } +#else + + printk(KERN_WARNING "NETjet-S: NO_PCI_BIOS\n"); + printk(KERN_WARNING "NETjet-S: unable to config NETJET-S PCI\n"); + return (0); + +#endif /* CONFIG_PCI */ + + 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: %s config port %#lx-%#lx already in use\n", + CardType[card->typ], + 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 |= SA_SHIRQ; + ISACVersion(cs, "NETjet-S:"); + return (1); +} |