t1isa.c

linux-2.6.15.6

/* $Id: t1isa.c,v 1.1.2.3 2004/02/10 01:07:12 keil Exp $
 * 
 * Module for AVM T1 HEMA-card.
 * 
 * Copyright 1999 by Carsten Paeth <[e-mail]>
 * 
 * This software may be used and distributed according to the terms
 * of the GNU General Public License, incorporated herein by reference.
 *
 */

#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/netdevice.h>
#include <linux/kernelcapi.h>
#include <linux/init.h>
#include <linux/pci.h>
#include <asm/io.h>
#include <linux/isdn/capicmd.h>
#include <linux/isdn/capiutil.h>
#include <linux/isdn/capilli.h>
#include "avmcard.h"

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

static char *revision = "$Revision: 1.1.2.3 $";

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

MODULE_DESCRIPTION("CAPI4Linux: Driver for AVM T1 HEMA ISA card");
MODULE_AUTHOR("Carsten Paeth");
MODULE_LICENSE("GPL");

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

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 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;

	/*
	 * no one else should use the ISA bus in this moment,
	 * but no function there to prevent this :-(
	 * 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 irqreturn_t t1isa_interrupt(int interrupt, void *devptr, struct pt_regs *regs)
{
	avmcard *card = devptr;
	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;
	unsigned long flags;

	spin_lock_irqsave(&card->lock, flags);

	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);
			spin_unlock_irqrestore(&card->lock, flags);

			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);
				capi_ctr_handle_message(ctrl, ApplId, skb);
			}
			break;

		case RECEIVE_MESSAGE:

			ApplId = (unsigned) b1_get_word(card->port);
			MsgLen = t1_get_slice(card->port, card->msgbuf);
			spin_unlock_irqrestore(&card->lock, flags);
			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);
				if (CAPIMSG_CMD(skb->data) == CAPI_DATA_B3)
					capilib_data_b3_conf(&cinfo->ncci_head, ApplId,
							     CAPIMSG_NCCI(skb->data),
							     CAPIMSG_MSGID(skb->data));

				capi_ctr_handle_message(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);
			spin_unlock_irqrestore(&card->lock, flags);

			capilib_new_ncci(&cinfo->ncci_head, ApplId, NCCI, WindowSize);

			break;

		case RECEIVE_FREE_NCCI:

			ApplId = b1_get_word(card->port);
			NCCI = b1_get_word(card->port);
			spin_unlock_irqrestore(&card->lock, flags);

			if (NCCI != 0xffffffff)
				capilib_free_ncci(&cinfo->ncci_head, ApplId, NCCI);

			break;

		case RECEIVE_START:
			b1_put_byte(card->port, SEND_POLLACK);
			spin_unlock_irqrestore(&card->lock, flags);
			capi_ctr_resume_output(ctrl);
			break;

		case RECEIVE_STOP:
			spin_unlock_irqrestore(&card->lock, flags);
			capi_ctr_suspend_output(ctrl);
			break;

		case RECEIVE_INIT:

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

		case RECEIVE_TASK_READY:
			ApplId = (unsigned) b1_get_word(card->port);
			MsgLen = t1_get_slice(card->port, card->msgbuf);
			spin_unlock_irqrestore(&card->lock, flags);
			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);
			spin_unlock_irqrestore(&card->lock, flags);
			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:
			spin_unlock_irqrestore(&card->lock, flags);
			printk(KERN_ERR "%s: card reseted ?\n", card->name);
			return IRQ_HANDLED;
		default:
			spin_unlock_irqrestore(&card->lock, flags);
			printk(KERN_ERR "%s: b1_interrupt: 0x%x ???\n",
					card->name, b1cmd);
			return IRQ_NONE;
		}
	}
	return IRQ_HANDLED;
}

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

static int t1isa_load_firmware(struct capi_ctr *ctrl, capiloaddata *data)
{
	avmctrl_info *cinfo = (avmctrl_info *)(ctrl->driverdata);
	avmcard *card = cinfo->card;
	unsigned int port = card->port;
	unsigned long flags;
	int retval;

	t1_disable_irq(port);
	b1_reset(port);

	if ((retval = b1_load_t4file(card, &data->firmware))) {