t1isa.c

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/*
 * $Id: t1isa.c,v 1.16 2000/11/23 20:45:14 kai Exp $
 * 
 * Module for AVM T1 HEMA-card.
 * 
 * (c) Copyright 1999 by Carsten Paeth ([e-mail])
 * 
 * $Log: t1isa.c,v $
 * Revision 1.16  2000/11/23 20:45:14  kai
 * fixed module_init/exit stuff
 * Note: compiled-in kernel doesn't work pre 2.2.18 anymore.
 *
 * Revision 1.15  2000/11/01 14:05:02  calle
 * - use module_init/module_exit from linux/init.h.
 * - all static struct variables are initialized with "membername:" now.
 * - avm_cs.c, let it work with newer pcmcia-cs.
 *
 * Revision 1.14  2000/10/10 17:44:19  kai
 * changes from/for 2.2.18
 *
 * Revision 1.13  2000/08/04 15:36:31  calle
 * copied wrong from file to file :-(
 *
 * Revision 1.12  2000/08/04 12:20:08  calle
 * - Fix unsigned/signed warning in the right way ...
 *
 * Revision 1.11  2000/04/03 13:29:25  calle
 * make Tim Waugh happy (module unload races in 2.3.99-pre3).
 * no real problem there, but now it is much cleaner ...
 *
 * Revision 1.10  2000/02/02 18:36:04  calle
 * - Modules are now locked while init_module is running
 * - fixed problem with memory mapping if address is not aligned
 *
 * Revision 1.9  2000/01/25 14:37:39  calle
 * new message after successfull detection including card revision and
 * used resources.
 *
 * Revision 1.8  1999/11/05 16:38:01  calle
 * Cleanups before kernel 2.4:
 * - Changed all messages to use card->name or driver->name instead of
 *   constant string.
 * - Moved some data from struct avmcard into new struct avmctrl_info.
 *   Changed all lowlevel capi driver to match the new structur.
 *
 * Revision 1.7  1999/09/15 08:16:03  calle
 * Implementation of 64Bit extention complete.
 *
 * Revision 1.6  1999/09/07 09:02:53  calle
 * SETDATA removed. Now inside the kernel the datapart of DATA_B3_REQ and
 * DATA_B3_IND is always directly after the CAPI message. The "Data" member
 * ist never used inside the kernel.
 *
 * Revision 1.5  1999/08/22 20:26:28  calle
 * backported changes from kernel 2.3.14:
 * - several #include "config.h" gone, others come.
 * - "struct device" changed to "struct net_device" in 2.3.14, added a
 *   define in isdn_compat.h for older kernel versions.
 *
 * Revision 1.4  1999/07/09 15:05:50  keil
 * compat.h is now isdn_compat.h
 *
 * Revision 1.3  1999/07/06 07:42:04  calle
 * - changes in /proc interface
 * - check and changed calls to [dev_]kfree_skb and [dev_]alloc_skb.
 *
 * Revision 1.2  1999/07/05 15:09:54  calle
 * - renamed "appl_release" to "appl_released".
 * - version und profile data now cleared on controller reset
 * - extended /proc interface, to allow driver and controller specific
 *   informations to include by driver hackers.
 *
 * Revision 1.1  1999/07/01 15:26:44  calle
 * complete new version (I love it):
 * + new hardware independed "capi_driver" interface that will make it easy to:
 *   - support other controllers with CAPI-2.0 (i.e. USB Controller)
 *   - write a CAPI-2.0 for the passive cards
 *   - support serial link CAPI-2.0 boxes.
 * + wrote "capi_driver" for all supported cards.
 * + "capi_driver" (supported cards) now have to be configured with
 *   make menuconfig, in the past all supported cards where included
 *   at once.
 * + new and better informations in /proc/capi/
 * + new ioctl to switch trace of capi messages per controller
 *   using "avmcapictrl trace [contr] on|off|...."
 * + complete testcircle with all supported cards and also the
 *   PCMCIA cards (now patch for pcmcia-cs-3.0.13 needed) done.
 *
 *
 */

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/skbuff.h>
#include <linux/delay.h>
#include <linux/mm.h>
#include <linux/interrupt.h>
#include <linux/ioport.h>
#include <linux/capi.h>
#include <linux/init.h>
#include <asm/io.h>
#include "capicmd.h"
#include "capiutil.h"
#include "capilli.h"
#include "avmcard.h"

static char *revision = "$Revision: 1.16 $";

/* ------------------------------------------------------------- */

MODULE_AUTHOR("Carsten Paeth <[e-mail]>");

/* ------------------------------------------------------------- */

static struct capi_driver_interface *di;

/* ------------------------------------------------------------- */

static int hema_irq_table[16] =
{0,
 0,
 0,
 0x80,				/* irq 3 */
 0,
 0x90,				/* irq 5 */
 0,
 0xA0,				/* irq 7 */
 0,
 0xB0,				/* irq 9 */
 0xC0,				/* irq 10 */
 0xD0,				/* irq 11 */
 0xE0,				/* irq 12 */
 0,
 0,
 0xF0,				/* irq 15 */
};

static int t1_detectandinit(unsigned int base, unsigned irq, int cardnr)
{
	unsigned char cregs[8];
	unsigned char reverse_cardnr;
	unsigned long flags;
	unsigned char dummy;
	int i;

	reverse_cardnr =   ((cardnr & 0x01) << 3) | ((cardnr & 0x02) << 1)
		         | ((cardnr & 0x04) >> 1) | ((cardnr & 0x08) >> 3);
	cregs[0] = (HEMA_VERSION_ID << 4) | (reverse_cardnr & 0xf);
	cregs[1] = 0x00; /* fast & slow link connected to CON1 */
	cregs[2] = 0x05; /* fast link 20MBit, slow link 20 MBit */
	cregs[3] = 0;
	cregs[4] = 0x11; /* zero wait state */
	cregs[5] = hema_irq_table[irq & 0xf];
	cregs[6] = 0;
	cregs[7] = 0;

	save_flags(flags);
	cli();
	/* board reset */
	t1outp(base, T1_RESETBOARD, 0xf);
	mdelay(100);
	dummy = t1inp(base, T1_FASTLINK+T1_OUTSTAT); /* first read */

	/* write config */
	dummy = (base >> 4) & 0xff;
	for (i=1;i<=0xf;i++) t1outp(base, i, dummy);
	t1outp(base, HEMA_PAL_ID & 0xf, dummy);
	t1outp(base, HEMA_PAL_ID >> 4, cregs[0]);
	for(i=1;i<7;i++) t1outp(base, 0, cregs[i]);
	t1outp(base, ((base >> 4)) & 0x3, cregs[7]);
	restore_flags(flags);

	mdelay(100);
	t1outp(base, T1_FASTLINK+T1_RESETLINK, 0);
	t1outp(base, T1_SLOWLINK+T1_RESETLINK, 0);
	mdelay(10);
	t1outp(base, T1_FASTLINK+T1_RESETLINK, 1);
	t1outp(base, T1_SLOWLINK+T1_RESETLINK, 1);
	mdelay(100);
	t1outp(base, T1_FASTLINK+T1_RESETLINK, 0);
	t1outp(base, T1_SLOWLINK+T1_RESETLINK, 0);
	mdelay(10);
	t1outp(base, T1_FASTLINK+T1_ANALYSE, 0);
	mdelay(5);
	t1outp(base, T1_SLOWLINK+T1_ANALYSE, 0);

	if (t1inp(base, T1_FASTLINK+T1_OUTSTAT) != 0x1) /* tx empty */
		return 1;
	if (t1inp(base, T1_FASTLINK+T1_INSTAT) != 0x0) /* rx empty */
		return 2;
	if (t1inp(base, T1_FASTLINK+T1_IRQENABLE) != 0x0)
		return 3;
	if ((t1inp(base, T1_FASTLINK+T1_FIFOSTAT) & 0xf0) != 0x70)
		return 4;
	if ((t1inp(base, T1_FASTLINK+T1_IRQMASTER) & 0x0e) != 0)
		return 5;
	if ((t1inp(base, T1_FASTLINK+T1_IDENT) & 0x7d) != 1)
		return 6;
	if (t1inp(base, T1_SLOWLINK+T1_OUTSTAT) != 0x1) /* tx empty */
		return 7;
	if ((t1inp(base, T1_SLOWLINK+T1_IRQMASTER) & 0x0e) != 0)
		return 8;
	if ((t1inp(base, T1_SLOWLINK+T1_IDENT) & 0x7d) != 0)
		return 9;
        return 0;
}

static void t1_handle_interrupt(avmcard * card)
{
	avmctrl_info *cinfo = &card->ctrlinfo[0];
	struct capi_ctr *ctrl = cinfo->capi_ctrl;
	unsigned char b1cmd;
	struct sk_buff *skb;

	unsigned ApplId;
	unsigned MsgLen;
	unsigned DataB3Len;
	unsigned NCCI;
	unsigned WindowSize;

	while (b1_rx_full(card->port)) {

		b1cmd = b1_get_byte(card->port);

		switch (b1cmd) {

		case RECEIVE_DATA_B3_IND:

			ApplId = (unsigned) b1_get_word(card->port);
			MsgLen = t1_get_slice(card->port, card->msgbuf);
			DataB3Len = t1_get_slice(card->port, card->databuf);

			if (MsgLen < 30) { /* not CAPI 64Bit */
				memset(card->msgbuf+MsgLen, 0, 30-MsgLen);
				MsgLen = 30;
				CAPIMSG_SETLEN(card->msgbuf, 30);
			}
			if (!(skb = alloc_skb(DataB3Len+MsgLen, GFP_ATOMIC))) {
				printk(KERN_ERR "%s: incoming packet dropped\n",
					card->name);
			} else {
				memcpy(skb_put(skb, MsgLen), card->msgbuf, MsgLen);
				memcpy(skb_put(skb, DataB3Len), card->databuf, DataB3Len);
				ctrl->handle_capimsg(ctrl, ApplId, skb);
			}
			break;

		case RECEIVE_MESSAGE:

			ApplId = (unsigned) b1_get_word(card->port);
			MsgLen = t1_get_slice(card->port, card->msgbuf);
			if (!(skb = alloc_skb(MsgLen, GFP_ATOMIC))) {
				printk(KERN_ERR "%s: incoming packet dropped\n",
						card->name);
			} else {
				memcpy(skb_put(skb, MsgLen), card->msgbuf, MsgLen);
				ctrl->handle_capimsg(ctrl, ApplId, skb);
			}
			break;

		case RECEIVE_NEW_NCCI:

			ApplId = b1_get_word(card->port);
			NCCI = b1_get_word(card->port);
			WindowSize = b1_get_word(card->port);

			ctrl->new_ncci(ctrl, ApplId, NCCI, WindowSize);

			break;

		case RECEIVE_FREE_NCCI:

			ApplId = b1_get_word(card->port);
			NCCI = b1_get_word(card->port);

			if (NCCI != 0xffffffff)
				ctrl->free_ncci(ctrl, ApplId, NCCI);
			else ctrl->appl_released(ctrl, ApplId);
			break;

		case RECEIVE_START:
			b1_put_byte(card->port, SEND_POLLACK);
			ctrl->resume_output(ctrl);
			break;

		case RECEIVE_STOP:
			ctrl->suspend_output(ctrl);
			break;

		case RECEIVE_INIT:

			cinfo->versionlen = t1_get_slice(card->port, cinfo->versionbuf);
			b1_parse_version(cinfo);
			printk(KERN_INFO "%s: %s-card (%s) now active\n",
			       card->name,
			       cinfo->version[VER_CARDTYPE],
			       cinfo->version[VER_DRIVER]);
			ctrl->ready(ctrl);
			break;

		case RECEIVE_TASK_READY:
			ApplId = (unsigned) b1_get_word(card->port);
			MsgLen = t1_get_slice(card->port, card->msgbuf);
			card->msgbuf[MsgLen] = 0;
			while (    MsgLen > 0
			       && (   card->msgbuf[MsgLen-1] == '\n'
				   || card->msgbuf[MsgLen-1] == '\r')) {
				card->msgbuf[MsgLen-1] = 0;
				MsgLen--;
			}
			printk(KERN_INFO "%s: task %d \"%s\" ready.\n",
					card->name, ApplId, card->msgbuf);
			break;

		case RECEIVE_DEBUGMSG:
			MsgLen = t1_get_slice(card->port, card->msgbuf);
			card->msgbuf[MsgLen] = 0;
			while (    MsgLen > 0
			       && (   card->msgbuf[MsgLen-1] == '\n'
				   || card->msgbuf[MsgLen-1] == '\r')) {
				card->msgbuf[MsgLen-1] = 0;
				MsgLen--;
			}
			printk(KERN_INFO "%s: DEBUG: %s\n", card->name, card->msgbuf);
			break;


		case 0xff: