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path: root/drivers/isdn/hisax/nj_s.c
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Diffstat (limited to 'drivers/isdn/hisax/nj_s.c')
-rw-r--r--drivers/isdn/hisax/nj_s.c294
1 files changed, 294 insertions, 0 deletions
diff --git a/drivers/isdn/hisax/nj_s.c b/drivers/isdn/hisax/nj_s.c
new file mode 100644
index 000000000..32b4bbd18
--- /dev/null
+++ b/drivers/isdn/hisax/nj_s.c
@@ -0,0 +1,294 @@
+/* $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 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
+ * unfortunately 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 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 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 = NULL;
+
+int 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 = hisax_find_pci_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);
+}