b1dma.c

内核linux2.4.20,可跟rtlinux3.2打补丁 组成实时linux系统,编译内核

	case RECEIVE_MESSAGE:

		ApplId = (unsigned) _get_word(&p);
		MsgLen = _get_slice(&p, 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 = _get_word(&p);
		NCCI = _get_word(&p);
		WindowSize = _get_word(&p);

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

		break;

	case RECEIVE_FREE_NCCI:

		ApplId = _get_word(&p);
		NCCI = _get_word(&p);

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

	case RECEIVE_START:
#ifdef CONFIG_B1DMA_POLLDEBUG
		printk(KERN_INFO "%s: receive poll\n", card->name);
#endif
		if (!suppress_pollack)
			queue_pollack(card);
		ctrl->resume_output(ctrl);
		break;

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

	case RECEIVE_INIT:

		cinfo->versionlen = _get_slice(&p, 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) _get_word(&p);
		MsgLen = _get_slice(&p, 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 = _get_slice(&p, 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;

	default:
		printk(KERN_ERR "%s: b1dma_interrupt: 0x%x ???\n",
				card->name, b1cmd);
		return;
	}
}

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

static void b1dma_handle_interrupt(avmcard *card)
{
	__u32 status = b1dmainmeml(card->mbase+AMCC_INTCSR);
	__u32 newcsr;

	if ((status & ANY_S5933_INT) == 0) 
		return;

        newcsr = card->csr | (status & ALL_INT);
	if (status & TX_TC_INT) newcsr &= ~EN_TX_TC_INT;
	if (status & RX_TC_INT) newcsr &= ~EN_RX_TC_INT;
	b1dmaoutmeml(card->mbase+AMCC_INTCSR, newcsr);

	if ((status & RX_TC_INT) != 0) {
		__u8 *recvbuf = card->dma->recvbuf;
		__u32 rxlen;
	   	if (card->dma->recvlen == 0) {
			card->dma->recvlen = *((__u32 *)recvbuf);
			rxlen = (card->dma->recvlen + 3) & ~3;
			b1dmaoutmeml(card->mbase+AMCC_RXPTR,
					virt_to_phys(recvbuf+4));
			b1dmaoutmeml(card->mbase+AMCC_RXLEN, rxlen);
		} else {
			b1dma_handle_rx(card);
	   		card->dma->recvlen = 0;
			b1dmaoutmeml(card->mbase+AMCC_RXPTR, virt_to_phys(recvbuf));
			b1dmaoutmeml(card->mbase+AMCC_RXLEN, 4);
		}
	}

	if ((status & TX_TC_INT) != 0) {
		card->csr &= ~EN_TX_TC_INT;
	        b1dma_dispatch_tx(card);
	}
	b1dmaoutmeml(card->mbase+AMCC_INTCSR, card->csr);
}

void b1dma_interrupt(int interrupt, void *devptr, struct pt_regs *regs)
{
	avmcard *card;

	card = (avmcard *) devptr;

	if (!card) {
		printk(KERN_WARNING "b1dma: interrupt: wrong device\n");
		return;
	}
	if (card->interrupt) {
		printk(KERN_ERR "%s: reentering interrupt hander\n", card->name);
		return;
	}

	card->interrupt = 1;

	b1dma_handle_interrupt(card);

	card->interrupt = 0;
}

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

static int b1dma_loaded(avmcard *card)
{
	unsigned long stop;
	unsigned char ans;
	unsigned long tout = 2;
	unsigned int base = card->port;

	for (stop = jiffies + tout * HZ; time_before(jiffies, stop);) {
		if (b1_tx_empty(base))
			break;
	}
	if (!b1_tx_empty(base)) {
		printk(KERN_ERR "%s: b1dma_loaded: tx err, corrupted t4 file ?\n",
				card->name);
		return 0;
	}
	b1_put_byte(base, SEND_POLLACK);
	for (stop = jiffies + tout * HZ; time_before(jiffies, stop);) {
		if (b1_rx_full(base)) {
			if ((ans = b1_get_byte(base)) == RECEIVE_POLLDWORD) {
				return 1;
			}
			printk(KERN_ERR "%s: b1dma_loaded: got 0x%x, firmware not running in dword mode\n", card->name, ans);
			return 0;
		}
	}
	printk(KERN_ERR "%s: b1dma_loaded: firmware not running\n", card->name);
	return 0;
}

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

static void b1dma_send_init(avmcard *card)
{
	struct sk_buff *skb;
	void *p;

	skb = alloc_skb(15, GFP_ATOMIC);
	if (!skb) {
		printk(KERN_CRIT "%s: no memory, lost register appl.\n",
					card->name);
		return;
	}
	p = skb->data;
	_put_byte(&p, 0);
	_put_byte(&p, 0);
	_put_byte(&p, SEND_INIT);
	_put_word(&p, CAPI_MAXAPPL);
	_put_word(&p, AVM_NCCI_PER_CHANNEL*30);
	_put_word(&p, card->cardnr - 1);
	skb_put(skb, (__u8 *)p - (__u8 *)skb->data);

	skb_queue_tail(&card->dma->send_queue, skb);
	b1dma_dispatch_tx(card);
}

int b1dma_load_firmware(struct capi_ctr *ctrl, capiloaddata *data)
{
	avmctrl_info *cinfo = (avmctrl_info *)(ctrl->driverdata);
	avmcard *card = cinfo->card;
	unsigned long flags;
	int retval;

	b1dma_reset(card);

	if ((retval = b1_load_t4file(card, &data->firmware))) {
		b1dma_reset(card);
		printk(KERN_ERR "%s: failed to load t4file!!\n",
					card->name);
		return retval;
	}

	if (data->configuration.len > 0 && data->configuration.data) {
		if ((retval = b1_load_config(card, &data->configuration))) {
			b1dma_reset(card);
			printk(KERN_ERR "%s: failed to load config!!\n",
					card->name);
			return retval;
		}
	}

	if (!b1dma_loaded(card)) {
		b1dma_reset(card);
		printk(KERN_ERR "%s: failed to load t4file.\n", card->name);
		return -EIO;
	}

	save_flags(flags);
	cli();

	card->csr = AVM_FLAG;
	b1dmaoutmeml(card->mbase+AMCC_INTCSR, card->csr);
	b1dmaoutmeml(card->mbase+AMCC_MCSR,
		EN_A2P_TRANSFERS|EN_P2A_TRANSFERS
		|A2P_HI_PRIORITY|P2A_HI_PRIORITY
		|RESET_A2P_FLAGS|RESET_P2A_FLAGS);
	t1outp(card->port, 0x07, 0x30);
	t1outp(card->port, 0x10, 0xF0);

	card->dma->recvlen = 0;
	b1dmaoutmeml(card->mbase+AMCC_RXPTR, virt_to_phys(card->dma->recvbuf));
	b1dmaoutmeml(card->mbase+AMCC_RXLEN, 4);
	card->csr |= EN_RX_TC_INT;
	b1dmaoutmeml(card->mbase+AMCC_INTCSR, card->csr);
	restore_flags(flags);

        b1dma_send_init(card);

	return 0;
}

void b1dma_reset_ctr(struct capi_ctr *ctrl)
{
	avmctrl_info *cinfo = (avmctrl_info *)(ctrl->driverdata);
	avmcard *card = cinfo->card;

 	b1dma_reset(card);

	memset(cinfo->version, 0, sizeof(cinfo->version));
	ctrl->reseted(ctrl);
}


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


void b1dma_register_appl(struct capi_ctr *ctrl,
				__u16 appl,
				capi_register_params *rp)
{
	avmctrl_info *cinfo = (avmctrl_info *)(ctrl->driverdata);
	avmcard *card = cinfo->card;
	struct sk_buff *skb;
	int want = rp->level3cnt;
	int nconn;
	void *p;

	if (want > 0) nconn = want;
	else nconn = ctrl->profile.nbchannel * -want;
	if (nconn == 0) nconn = ctrl->profile.nbchannel;

	skb = alloc_skb(23, GFP_ATOMIC);
	if (!skb) {
		printk(KERN_CRIT "%s: no memory, lost register appl.\n",
					card->name);
		return;
	}
	p = skb->data;
	_put_byte(&p, 0);
	_put_byte(&p, 0);
	_put_byte(&p, SEND_REGISTER);
	_put_word(&p, appl);
	_put_word(&p, 1024 * (nconn+1));
	_put_word(&p, nconn);
	_put_word(&p, rp->datablkcnt);
	_put_word(&p, rp->datablklen);
	skb_put(skb, (__u8 *)p - (__u8 *)skb->data);

	skb_queue_tail(&card->dma->send_queue, skb);
	b1dma_dispatch_tx(card);

	ctrl->appl_registered(ctrl, appl);
}

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

void b1dma_release_appl(struct capi_ctr *ctrl, __u16 appl)
{
	avmctrl_info *cinfo = (avmctrl_info *)(ctrl->driverdata);
	avmcard *card = cinfo->card;
	struct sk_buff *skb;
	void *p;

	skb = alloc_skb(7, GFP_ATOMIC);
	if (!skb) {
		printk(KERN_CRIT "%s: no memory, lost release appl.\n",
					card->name);
		return;
	}
	p = skb->data;
	_put_byte(&p, 0);
	_put_byte(&p, 0);
	_put_byte(&p, SEND_RELEASE);
	_put_word(&p, appl);

	skb_put(skb, (__u8 *)p - (__u8 *)skb->data);
	skb_queue_tail(&card->dma->send_queue, skb);
	b1dma_dispatch_tx(card);
}

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

void b1dma_send_message(struct capi_ctr *ctrl, struct sk_buff *skb)
{
	avmctrl_info *cinfo = (avmctrl_info *)(ctrl->driverdata);
	avmcard *card = cinfo->card;
	skb_queue_tail(&card->dma->send_queue, skb);
	b1dma_dispatch_tx(card);
}

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

int b1dmactl_read_proc(char *page, char **start, off_t off,
        		int count, int *eof, struct capi_ctr *ctrl)
{
	avmctrl_info *cinfo = (avmctrl_info *)(ctrl->driverdata);
	avmcard *card = cinfo->card;
	unsigned long flags;
	__u8 flag;
	int len = 0;
	char *s;
	__u32 txaddr, txlen, rxaddr, rxlen, csr;

	len += sprintf(page+len, "%-16s %s\n", "name", card->name);
	len += sprintf(page+len, "%-16s 0x%x\n", "io", card->port);
	len += sprintf(page+len, "%-16s %d\n", "irq", card->irq);
	len += sprintf(page+len, "%-16s 0x%lx\n", "membase", card->membase);
	switch (card->cardtype) {
	case avm_b1isa: s = "B1 ISA"; break;
	case avm_b1pci: s = "B1 PCI"; break;
	case avm_b1pcmcia: s = "B1 PCMCIA"; break;
	case avm_m1: s = "M1"; break;
	case avm_m2: s = "M2"; break;
	case avm_t1isa: s = "T1 ISA (HEMA)"; break;
	case avm_t1pci: s = "T1 PCI"; break;
	case avm_c4: s = "C4"; break;
	case avm_c2: s = "C2"; break;
	default: s = "???"; break;
	}
	len += sprintf(page+len, "%-16s %s\n", "type", s);
	if ((s = cinfo->version[VER_DRIVER]) != 0)
	   len += sprintf(page+len, "%-16s %s\n", "ver_driver", s);
	if ((s = cinfo->version[VER_CARDTYPE]) != 0)
	   len += sprintf(page+len, "%-16s %s\n", "ver_cardtype", s);
	if ((s = cinfo->version[VER_SERIAL]) != 0)
	   len += sprintf(page+len, "%-16s %s\n", "ver_serial", s);

	if (card->cardtype != avm_m1) {
        	flag = ((__u8 *)(ctrl->profile.manu))[3];
        	if (flag)
			len += sprintf(page+len, "%-16s%s%s%s%s%s%s%s\n",
			"protocol",
			(flag & 0x01) ? " DSS1" : "",
			(flag & 0x02) ? " CT1" : "",
			(flag & 0x04) ? " VN3" : "",
			(flag & 0x08) ? " NI1" : "",
			(flag & 0x10) ? " AUSTEL" : "",
			(flag & 0x20) ? " ESS" : "",
			(flag & 0x40) ? " 1TR6" : ""
			);
	}
	if (card->cardtype != avm_m1) {
        	flag = ((__u8 *)(ctrl->profile.manu))[5];
		if (flag)
			len += sprintf(page+len, "%-16s%s%s%s%s\n",
			"linetype",
			(flag & 0x01) ? " point to point" : "",
			(flag & 0x02) ? " point to multipoint" : "",
			(flag & 0x08) ? " leased line without D-channel" : "",
			(flag & 0x04) ? " leased line with D-channel" : ""
			);
	}
	len += sprintf(page+len, "%-16s %s\n", "cardname", cinfo->cardname);

	save_flags(flags);
	cli();

	txaddr = (__u32)phys_to_virt(b1dmainmeml(card->mbase+0x2c));
	txaddr -= (__u32)card->dma->sendbuf;
	txlen  = b1dmainmeml(card->mbase+0x30);

	rxaddr = (__u32)phys_to_virt(b1dmainmeml(card->mbase+0x24));
	rxaddr -= (__u32)card->dma->recvbuf;
	rxlen  = b1dmainmeml(card->mbase+0x28);

	csr  = b1dmainmeml(card->mbase+AMCC_INTCSR);

	restore_flags(flags);

        len += sprintf(page+len, "%-16s 0x%lx\n",
				"csr (cached)", (unsigned long)card->csr);
        len += sprintf(page+len, "%-16s 0x%lx\n",
				"csr", (unsigned long)csr);
        len += sprintf(page+len, "%-16s %lu\n",
				"txoff", (unsigned long)txaddr);
        len += sprintf(page+len, "%-16s %lu\n",
				"txlen", (unsigned long)txlen);
        len += sprintf(page+len, "%-16s %lu\n",
				"rxoff", (unsigned long)rxaddr);
        len += sprintf(page+len, "%-16s %lu\n",
				"rxlen", (unsigned long)rxlen);

	if (off+count >= len)
	   *eof = 1;
	if (len < off)
           return 0;
	*start = page + off;
	return ((count < len-off) ? count : len-off);
}

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

EXPORT_SYMBOL(b1dma_reset);
EXPORT_SYMBOL(t1pci_detect);
EXPORT_SYMBOL(b1pciv4_detect);
EXPORT_SYMBOL(b1dma_interrupt);

EXPORT_SYMBOL(b1dma_load_firmware);
EXPORT_SYMBOL(b1dma_reset_ctr);
EXPORT_SYMBOL(b1dma_register_appl);
EXPORT_SYMBOL(b1dma_release_appl);
EXPORT_SYMBOL(b1dma_send_message);
EXPORT_SYMBOL(b1dmactl_read_proc);

int b1dma_init(void)
{
	char *p;
	char rev[32];

	if ((p = strchr(revision, ':')) != 0 && p[1]) {
		strncpy(rev, p + 2, sizeof(rev));
		rev[sizeof(rev)-1] = 0;
		if ((p = strchr(rev, '$')) != 0 && p > rev)
		   *(p-1) = 0;
	} else
		strcpy(rev, "1.0");

	printk(KERN_INFO "b1dma: revision %s\n", rev);

	return 0;
}

void b1dma_exit(void)
{
}

module_init(b1dma_init);
module_exit(b1dma_exit);