X-Git-Url: http://rtime.felk.cvut.cz/gitweb/lincan.git/blobdiff_plain/4cf24de229090b1ab6279570a564d224e13dd706..2827b727d2910a3b48f9de7d67b3a67f59e256c7:/lincan/src/irq.c

diff --git a/lincan/src/irq.c b/lincan/src/irq.c
index 92ce53e..26d0cf7 100644
--- a/lincan/src/irq.c
+++ b/lincan/src/irq.c
@@ -1,298 +1,19 @@
 /* irq.c
  * Linux CAN-bus device driver.
  * Written by Arnaud Westenberg email:arnaud@wanadoo.nl
+ * Rewritten for new CAN queues by Pavel Pisa - OCERA team member
+ * email:pisa@cmp.felk.cvut.cz
  * This software is released under the GPL-License.
- * Version 0.7  6 Aug 2001
+ * Version lincan-0.2  9 Jul 2003
  */
 
-#include <linux/autoconf.h>
-#if defined (CONFIG_MODVERSIONS) && !defined (MODVERSIONS)
-#define MODVERSIONS
-#endif
-
-#if defined (MODVERSIONS)
-#include <linux/modversions.h>
-#endif 
-
-#include <linux/sched.h>
-#include <linux/version.h>
-
-#if (LINUX_VERSION_CODE <= KERNEL_VERSION(2,2,19))
-#include <asm/spinlock.h>
-#else
-#include <linux/spinlock.h>
-#endif
-
+#include "../include/can.h"
+#include "../include/can_sysdep.h"
 #include "../include/main.h"
 #include "../include/irq.h"
-#include "../include/i82527.h"
-#include "../include/sja1000.h"
-
-void i82527_irq_rtr_handler(void);
-void sja1000_irq_read_handler(void);
-void sja1000_irq_write_handler(void);
-
-void (*put_reg)(unsigned char data, unsigned long address);
-unsigned (*get_reg)(unsigned long address);
-
-struct chip_t *chip=NULL;
-struct candevice_t *device=NULL;
-unsigned object=0,irq_register=0;
-unsigned long msgbase=0;
-struct canfifo_t *fifo=NULL;
-unsigned long message_id=0;
-struct rtr_id *rtr_search;
-
-inline void i82527_irq_write_handler(void)
-{
-	put_reg((MVAL_RES|TXIE_RES|RXIE_RES|INTPD_RES),msgbase+iMSGCTL0);
-
-	fifo->tx_readp++;
-	if (fifo->tx_readp >= fifo->buf_tx_entry + MAX_BUF_LENGTH)
-		fifo->tx_readp = fifo->buf_tx_entry;
-	if (fifo->tx_readp == fifo->tx_writep) { // Output buffer is empty
-		fifo->tx_in_progress = 0;
-		if (waitqueue_active(&fifo->writeq)) {
-			chip->msgobj[object]->ret = 0;
-			wake_up_interruptible(&fifo->writeq);
-		}
-		return;
-	}
-	if (chip->chipspecops->pre_write_config(chip, chip->msgobj[object],
-							fifo->tx_readp)) {
-		if (waitqueue_active(&fifo->writeq)) {
-			chip->msgobj[object]->ret = -1;
-			wake_up_interruptible(&fifo->writeq);
-			return;
-		}
-	}
-	if (chip->chipspecops->send_msg(chip, chip->msgobj[object],
-							fifo->tx_readp)) {
-		if (waitqueue_active(&fifo->writeq)) {
-			chip->msgobj[object]->ret = -1;
-			wake_up_interruptible(&fifo->writeq);
-			return;
-		}
-	} 
-}
-
-inline void i82527_irq_read_handler(void)
-{
-	int i=0, tmp=1 ;
-
-	while (tmp) {
-		put_reg((RMPD_RES|TXRQ_RES|MLST_RES|NEWD_RES), msgbase +
-								iMSGCTL1);
-		put_reg((MVAL_SET|TXIE_RES|RXIE_SET|INTPD_RES), msgbase +
-								iMSGCTL0);
-
-		fifo->rx_writep->length =(get_reg(msgbase+iMSGCFG) & 0xf0) >> 4;
-		fifo->rx_writep->id = message_id;
-		for (i=0; i < fifo->rx_writep->length; i++)
-			fifo->rx_writep->data[i] = get_reg(msgbase+iMSGDAT0+i);
-
-//FIXME: Add buffer overflow check, currently it's silently over written!
-
-		fifo->rx_writep++;
-		if (fifo->rx_writep >= fifo->buf_rx_entry + MAX_BUF_LENGTH)
-			fifo->rx_writep = fifo->buf_rx_entry;
-
-		if (!((tmp=get_reg(msgbase + iMSGCTL1)) & NEWD_SET)) {
-			break;
-		}
-
-		if (tmp & MLST_SET)
-			CANMSG("Message lost!\n");
-
-	}
-	if (waitqueue_active(&fifo->readq)) {
-		wake_up_interruptible(&fifo->readq);
-	}
-}
-
-void i82527_irq_handler(int irq, void *dev_id, struct pt_regs *regs)
-{
-	int id0=0, id1=0, id2=0, id3=0;
-
-	chip=(struct chip_t *)dev_id;
-	device=(struct candevice_t *)chip->hostdevice;
-
-	put_reg=device->hwspecops->write_register;
-	get_reg=device->hwspecops->read_register;
-
-	if ( (chip->flags & SEGMENTED) != 0)
-		irq_register = get_reg(chip->chip_base_addr+iIRQ+SPACING);
-	else 
-		irq_register = get_reg(chip->chip_base_addr+iIRQ);
-
-	while (irq_register) {
-
-		if (irq_register == 0x01) {
-			DEBUGMSG("Status register: 0x%x\n",get_reg(chip->chip_base_addr+iSTAT));
-			return;
-		}
-		
-		if (irq_register == 0x02)
-			object = 14;
-		else
-			object = irq_register-3;
 
-		fifo=chip->msgobj[object]->fifo;
-		msgbase=chip->msgobj[object]->obj_base_addr;
-
-		if (get_reg(msgbase+iMSGCFG) & MCFG_DIR) {
-			i82527_irq_write_handler(); 
-		}
-		else { 
-
-			if (extended) {
-				id0=get_reg(msgbase+iMSGID3);
-				id1=get_reg(msgbase+iMSGID2)<<8;
-				id2=get_reg(msgbase+iMSGID1)<<16;
-				id3=get_reg(msgbase+iMSGID0)<<24;
-				message_id=(id0|id1|id2|id3)>>3;
-			}
-			else {
-				id0=get_reg(msgbase+iMSGID1);
-				id1=get_reg(msgbase+iMSGID0)<<8;
-				message_id=(id0|id1)>>5;
-			}
-
-			spin_lock(&hardware_p->rtr_lock);
-			rtr_search=hardware_p->rtr_queue;
-			while (rtr_search != NULL) {
-				if (rtr_search->id == message_id)
-					break;
-				rtr_search=rtr_search->next;
-			}
-			spin_unlock(&hardware_p->rtr_lock);
-			if ((rtr_search!=NULL) && (rtr_search->id==message_id))
-				i82527_irq_rtr_handler();
-			else
-				i82527_irq_read_handler(); 
-		}
-
-		if ( (chip->flags & SEGMENTED) != 0)
-			irq_register=get_reg(chip->chip_base_addr+iIRQ+SPACING);
-		else
-			irq_register=get_reg(chip->chip_base_addr+iIRQ);
-	}
-	
-}
-
-void i82527_irq_rtr_handler(void)
-{
-	short int i=0;
-
-	put_reg((MVAL_RES|TXIE_RES|RXIE_RES|INTPD_RES),msgbase + iMSGCTL0);
-	put_reg((RMPD_RES|TXRQ_RES|MLST_RES|NEWD_RES),msgbase + iMSGCTL1);
-	
-	spin_lock(&hardware_p->rtr_lock);
-
-	rtr_search->rtr_message->id=message_id;
-	rtr_search->rtr_message->length=(get_reg(msgbase + iMSGCFG) & 0xf0)>>4;
-	for (i=0; i<rtr_search->rtr_message->length; i++)
-		rtr_search->rtr_message->data[i]=get_reg(msgbase+iMSGDAT0+i);
-	
-	spin_unlock(&hardware_p->rtr_lock);
-
-	if (waitqueue_active(&rtr_search->rtr_wq))
-		wake_up_interruptible(&rtr_search->rtr_wq);
-}
-
-void sja1000_irq_handler(int irq, void *dev_id, struct pt_regs *regs)
-{
-	chip=(struct chip_t *)dev_id;
-	device=(struct candevice_t *)chip->hostdevice;
-
-	put_reg=device->hwspecops->write_register;
-	get_reg=device->hwspecops->read_register;
-
-	irq_register=get_reg(chip->chip_base_addr+SJAIR);
-//	DEBUGMSG("sja1000_irq_handler: SJAIR:%02x\n",irq_register);
-//	DEBUGMSG("sja1000_irq_handler: SJASR:%02x\n",
-//					get_reg(chip->chip_base_addr+SJASR));
-
-	if ((irq_register & (IR_WUI|IR_DOI|IR_EI|IR_TI|IR_RI)) == 0)
-		return;
-
-	fifo=chip->msgobj[0]->fifo;
-	msgbase=chip->msgobj[0]->obj_base_addr;
-
-	if ((irq_register & IR_RI) != 0) 
-		sja1000_irq_read_handler();
-	if ((irq_register & IR_TI) != 0) 
-		sja1000_irq_write_handler();
-	if ((irq_register & (IR_EI|IR_DOI)) != 0) { 
-		// Some error happened
-// FIXME: chip should be brought to usable state. Transmission cancelled if in progress.
-// Reset flag set to 0 if chip is already off the bus. Full state report
-		CANMSG("Error: status register: 0x%x irq_register: 0x%02x\n",
-			get_reg(chip->chip_base_addr+SJASR), irq_register);
-		chip->msgobj[0]->ret=-1;
-		if (waitqueue_active(&fifo->writeq))
-			wake_up_interruptible(&fifo->writeq);
-		if (waitqueue_active(&fifo->readq))
-			wake_up_interruptible(&fifo->readq);
-	}
-
-	return;
-}
-void sja1000_irq_read_handler(void)
-{
-	int i=0, id=0, tmp=1;
-
-	while (tmp) {
-		id = get_reg(msgbase+SJARXID0) | (get_reg(msgbase+SJARXID1)<<8);
-		fifo->buf_rx_entry[fifo->head].length = id & 0x0f;
-		fifo->buf_rx_entry[fifo->head].flags = id&ID0_RTR ? MSG_RTR : 0;
-		fifo->buf_rx_entry[fifo->head].timestamp = 0;
-		fifo->buf_rx_entry[fifo->head].cob = 0;
-		fifo->buf_rx_entry[fifo->head].id = id>>5;
-
-		for (i=0; i<fifo->buf_rx_entry[fifo->head].length; i++)
-			fifo->buf_rx_entry[fifo->head].data[i]=get_reg(msgbase +
-								SJARXDAT0 + i);
-
-		put_reg(CMR_RRB,msgbase+SJACMR);
-
-		fifo->head++;
-		if (fifo->head >= MAX_BUF_LENGTH-1)
-			fifo->head=0;
-
-		tmp=(get_reg(msgbase+SJASR) & SR_RBS);
-	}
-	if (waitqueue_active(&fifo->readq))
-		wake_up_interruptible(&fifo->readq);
-}
 
-void sja1000_irq_write_handler(void)
-{
-	fifo->tx_readp++;
-	if (fifo->tx_readp >= fifo->buf_tx_entry + MAX_BUF_LENGTH)
-		fifo->tx_readp = fifo->buf_tx_entry;
-	if (fifo->tx_readp == fifo->tx_writep) { // Output buffer is empty
-		fifo->tx_in_progress = 0;
-		if (waitqueue_active(&fifo->writeq)) {
-			chip->msgobj[object]->ret = 0;
-			wake_up_interruptible(&fifo->writeq);
-		}
-		return;
-	}
-	if (chip->chipspecops->pre_write_config(chip, chip->msgobj[object],
-							fifo->tx_readp)) {
-		if (waitqueue_active(&fifo->writeq)) {
-			chip->msgobj[object]->ret = -1;
-			wake_up_interruptible(&fifo->writeq);
-			return;
-		}
-	}
-	if (chip->chipspecops->send_msg(chip, chip->msgobj[object],
-							fifo->tx_readp)) {
-		if (waitqueue_active(&fifo->writeq)) {
-			chip->msgobj[object]->ret = -1;
-			wake_up_interruptible(&fifo->writeq);
-			return;
-		}
-	}
+can_irqreturn_t dummy_irq_handler(int irq, void *dev_id, struct pt_regs *regs) {
+	CANMSG("dummy_irq_handler called irq %d \n", irq);
+	return CAN_IRQ_NONE;
 }