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