296 lines
7.2 KiB
C
296 lines
7.2 KiB
C
/* $Id$
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* isurf.c low level stuff for Siemens I-Surf/I-Talk cards
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*
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* Author Karsten Keil (keil@isdn4linux.de)
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*
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* $Log$
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* Revision 1.6 1999/09/04 06:20:06 keil
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* Changes from kernel set_current_state()
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*
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* Revision 1.5 1999/08/25 17:00:02 keil
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* Make ISAR V32bis modem running
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* Make LL->HL interface open for additional commands
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*
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* Revision 1.4 1999/08/22 20:27:09 calle
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* backported changes from kernel 2.3.14:
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* - several #include "config.h" gone, others come.
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* - "struct device" changed to "struct net_device" in 2.3.14, added a
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* define in isdn_compat.h for older kernel versions.
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*
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* Revision 1.3 1999/07/12 21:05:18 keil
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* fix race in IRQ handling
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* added watchdog for lost IRQs
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*
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* Revision 1.2 1999/07/01 08:07:56 keil
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* Initial version
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*
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*
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*
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*/
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#define __NO_VERSION__
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#include "hisax.h"
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#include "isac.h"
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#include "isar.h"
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#include "isdnl1.h"
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extern const char *CardType[];
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static const char *ISurf_revision = "$Revision$";
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#define byteout(addr,val) outb(val,addr)
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#define bytein(addr) inb(addr)
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#define ISURF_ISAR_RESET 1
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#define ISURF_ISAC_RESET 2
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#define ISURF_ISAR_EA 4
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#define ISURF_ARCOFI_RESET 8
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#define ISURF_RESET (ISURF_ISAR_RESET | ISURF_ISAC_RESET | ISURF_ARCOFI_RESET)
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#define ISURF_ISAR_OFFSET 0
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#define ISURF_ISAC_OFFSET 0x100
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#define ISURF_IOMEM_SIZE 0x400
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/* Interface functions */
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static u_char
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ReadISAC(struct IsdnCardState *cs, u_char offset)
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{
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return (readb(cs->hw.isurf.isac + offset));
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}
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static void
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WriteISAC(struct IsdnCardState *cs, u_char offset, u_char value)
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{
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writeb(value, cs->hw.isurf.isac + offset); mb();
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}
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static void
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ReadISACfifo(struct IsdnCardState *cs, u_char * data, int size)
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{
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register int i;
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for (i = 0; i < size; i++)
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data[i] = readb(cs->hw.isurf.isac);
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}
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static void
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WriteISACfifo(struct IsdnCardState *cs, u_char * data, int size)
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{
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register int i;
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for (i = 0; i < size; i++){
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writeb(data[i], cs->hw.isurf.isac);mb();
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}
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}
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/* ISAR access routines
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* mode = 0 access with IRQ on
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* mode = 1 access with IRQ off
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* mode = 2 access with IRQ off and using last offset
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*/
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static u_char
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ReadISAR(struct IsdnCardState *cs, int mode, u_char offset)
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{
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return(readb(cs->hw.isurf.isar + offset));
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}
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static void
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WriteISAR(struct IsdnCardState *cs, int mode, u_char offset, u_char value)
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{
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writeb(value, cs->hw.isurf.isar + offset);mb();
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}
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static void
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isurf_interrupt(int intno, void *dev_id, struct pt_regs *regs)
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{
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struct IsdnCardState *cs = dev_id;
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u_char val;
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int cnt = 5;
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if (!cs) {
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printk(KERN_WARNING "ISurf: Spurious interrupt!\n");
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return;
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}
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val = readb(cs->hw.isurf.isar + ISAR_IRQBIT);
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Start_ISAR:
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if (val & ISAR_IRQSTA)
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isar_int_main(cs);
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val = readb(cs->hw.isurf.isac + ISAC_ISTA);
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Start_ISAC:
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if (val)
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isac_interrupt(cs, val);
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val = readb(cs->hw.isurf.isar + ISAR_IRQBIT);
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if ((val & ISAR_IRQSTA) && --cnt) {
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if (cs->debug & L1_DEB_HSCX)
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debugl1(cs, "ISAR IntStat after IntRoutine");
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goto Start_ISAR;
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}
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val = readb(cs->hw.isurf.isac + ISAC_ISTA);
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if (val && --cnt) {
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if (cs->debug & L1_DEB_ISAC)
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debugl1(cs, "ISAC IntStat after IntRoutine");
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goto Start_ISAC;
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}
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if (!cnt)
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printk(KERN_WARNING "ISurf IRQ LOOP\n");
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writeb(0, cs->hw.isurf.isar + ISAR_IRQBIT); mb();
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writeb(0xFF, cs->hw.isurf.isac + ISAC_MASK);mb();
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writeb(0, cs->hw.isurf.isac + ISAC_MASK);mb();
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writeb(ISAR_IRQMSK, cs->hw.isurf.isar + ISAR_IRQBIT); mb();
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}
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void
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release_io_isurf(struct IsdnCardState *cs)
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{
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release_region(cs->hw.isurf.reset, 1);
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#ifdef COMPAT_HAS_ISA_IOREMAP
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iounmap((unsigned char *)cs->hw.isurf.isar);
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release_mem_region(cs->hw.isurf.phymem, ISURF_IOMEM_SIZE);
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#endif
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}
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static void
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reset_isurf(struct IsdnCardState *cs, u_char chips)
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{
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long flags;
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printk(KERN_INFO "ISurf: resetting card\n");
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byteout(cs->hw.isurf.reset, chips); /* Reset On */
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save_flags(flags);
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sti();
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set_current_state(TASK_INTERRUPTIBLE);
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schedule_timeout((10*HZ)/1000);
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byteout(cs->hw.isurf.reset, ISURF_ISAR_EA); /* Reset Off */
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set_current_state(TASK_INTERRUPTIBLE);
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schedule_timeout((10*HZ)/1000);
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restore_flags(flags);
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}
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static int
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ISurf_card_msg(struct IsdnCardState *cs, int mt, void *arg)
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{
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switch (mt) {
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case CARD_RESET:
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reset_isurf(cs, ISURF_RESET);
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return(0);
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case CARD_RELEASE:
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release_io_isurf(cs);
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return(0);
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case CARD_INIT:
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clear_pending_isac_ints(cs);
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writeb(0, cs->hw.isurf.isar+ISAR_IRQBIT);mb();
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initisac(cs);
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initisar(cs);
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/* Reenable ISAC IRQ */
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cs->writeisac(cs, ISAC_MASK, 0);
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/* RESET Receiver and Transmitter */
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cs->writeisac(cs, ISAC_CMDR, 0x41);
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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
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isurf_auxcmd(struct IsdnCardState *cs, isdn_ctrl *ic) {
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int ret;
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if ((ic->command == ISDN_CMD_IOCTL) && (ic->arg == 9)) {
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ret = isar_auxcmd(cs, ic);
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if (!ret) {
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reset_isurf(cs, ISURF_ISAR_EA | ISURF_ISAC_RESET |
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ISURF_ARCOFI_RESET);
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initisac(cs);
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cs->writeisac(cs, ISAC_MASK, 0);
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cs->writeisac(cs, ISAC_CMDR, 0x41);
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}
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return(ret);
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}
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return(isar_auxcmd(cs, ic));
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}
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__initfunc(int
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setup_isurf(struct IsdnCard *card))
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{
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int ver;
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struct IsdnCardState *cs = card->cs;
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char tmp[64];
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strcpy(tmp, ISurf_revision);
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printk(KERN_INFO "HiSax: ISurf driver Rev. %s\n", HiSax_getrev(tmp));
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if (cs->typ != ISDN_CTYPE_ISURF)
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return(0);
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if (card->para[1] && card->para[2]) {
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cs->hw.isurf.reset = card->para[1];
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cs->hw.isurf.phymem = card->para[2];
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cs->irq = card->para[0];
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} else {
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printk(KERN_WARNING "HiSax: %s port/mem not set\n",
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CardType[card->typ]);
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return (0);
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}
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if (check_region(cs->hw.isurf.reset, 1)) {
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printk(KERN_WARNING
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"HiSax: %s config port %x already in use\n",
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CardType[card->typ],
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cs->hw.isurf.reset);
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return (0);
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} else {
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request_region(cs->hw.isurf.reset, 1, "isurf isdn");
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}
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#ifdef COMPAT_HAS_ISA_IOREMAP
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if (check_mem_region(cs->hw.isurf.phymem, ISURF_IOMEM_SIZE)) {
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printk(KERN_WARNING
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"HiSax: %s memory region %lx-%lx already in use\n",
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CardType[card->typ],
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cs->hw.isurf.phymem,
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cs->hw.isurf.phymem + ISURF_IOMEM_SIZE);
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release_region(cs->hw.isurf.reset, 1);
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return (0);
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} else {
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request_mem_region(cs->hw.isurf.phymem, ISURF_IOMEM_SIZE,
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"isurf iomem");
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}
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cs->hw.isurf.isar =
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(unsigned long) ioremap(cs->hw.isurf.phymem, ISURF_IOMEM_SIZE);
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cs->hw.isurf.isac = cs->hw.isurf.isar + ISURF_ISAC_OFFSET;
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#else
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cs->hw.isurf.isar = cs->hw.isurf.phymem + ISURF_ISAR_OFFSET;
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cs->hw.isurf.isac = cs->hw.isurf.phymem + ISURF_ISAC_OFFSET;
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#endif
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printk(KERN_INFO
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"ISurf: defined at 0x%x 0x%lx IRQ %d\n",
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cs->hw.isurf.reset,
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cs->hw.isurf.phymem,
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cs->irq);
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cs->cardmsg = &ISurf_card_msg;
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cs->irq_func = &isurf_interrupt;
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cs->auxcmd = &isurf_auxcmd;
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cs->readisac = &ReadISAC;
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cs->writeisac = &WriteISAC;
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cs->readisacfifo = &ReadISACfifo;
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cs->writeisacfifo = &WriteISACfifo;
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cs->bcs[0].hw.isar.reg = &cs->hw.isurf.isar_r;
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cs->bcs[1].hw.isar.reg = &cs->hw.isurf.isar_r;
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reset_isurf(cs, ISURF_RESET);
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test_and_set_bit(HW_ISAR, &cs->HW_Flags);
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ISACVersion(cs, "ISurf:");
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cs->BC_Read_Reg = &ReadISAR;
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cs->BC_Write_Reg = &WriteISAR;
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cs->BC_Send_Data = &isar_fill_fifo;
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ver = ISARVersion(cs, "ISurf:");
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if (ver < 0) {
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printk(KERN_WARNING
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"ISurf: wrong ISAR version (ret = %d)\n", ver);
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release_io_isurf(cs);
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return (0);
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}
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return (1);
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}
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