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[/] [openrisc/] [trunk/] [rtos/] [rtems/] [c/] [src/] [lib/] [libbsp/] [powerpc/] [eth_comm/] [canbus/] [canbus.c] - Blame information for rev 173

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/*
 * RTEMS CANBUS driver for eth-comm BSP
 *
 * Written by Jay Monkman (jmonkman@frasca.com)
 *
 *  COPYRIGHT (c) 1998
 *  Frasca International, Inc.
 *
 *  The license and distribution terms for this file may be
 *  found in the file LICENSE in this distribution or at
 *  http://www.OARcorp.com/rtems/license.html.
 *
 *  Note: All of this code assumes a 10Mhz clock input to the 82527
 *
 *  $Id: canbus.c,v 1.2 2001-09-27 12:00:35 chris Exp $
 */
#include <stdio.h>
#include <bsp.h>
#include <mpc860.h>
#include <rtems/error.h>
#include <canbus.h>
/* How many CAN interfaces are there? */
#define NUM_CAN_DEVS 3
 
/* How many received messages should be buffered for each channel */
#define RX_CAN_BUF_SIZE 16
 
int rxMsgBufHead[NUM_CAN_DEVS];
int rxMsgBufTail[NUM_CAN_DEVS];
i82527_msg_t rxMsgBuf[NUM_CAN_DEVS][RX_CAN_BUF_SIZE];
 
volatile i82527_t *candev[NUM_CAN_DEVS];
 
 
static rtems_isr
canInterruptHandler (rtems_vector_number v)
{
  int dev;
  int tmpTail;
 
  switch (v) {
  case PPC_IRQ_IRQ3: dev = 0; break;
  case PPC_IRQ_IRQ4: dev = 1; break;
  case PPC_IRQ_IRQ2: dev = 2; break;
  default:           return;    /* something screwed up */
  }
 
  /* we only do rx interrupts right now */
  if (!(candev[dev]->msg15.ctrl1 & I82527_MSG_CTRL_NEWDAT)) {
    /* Hmmm, that's odd. Why were we triggered? */
    candev[dev]->msg15.ctrl0 = 0xff & (I82527_MSG_CTRL_INTPND_CLR |
                                       I82527_MSG_CTRL_MSGVAL_SET);
    candev[dev]->msg15.ctrl1 = 0xff & (I82527_MSG_CTRL_RMTPND_CLR |
                                       I82527_MSG_CTRL_MSGLST_CLR |
                                       I82527_MSG_CTRL_NEWDAT_CLR);
    return;
  }
  tmpTail = rxMsgBufTail[dev];
  while (1) {
    if ((tmpTail == rxMsgBufHead[dev]) &&
        (rxMsgBuf[dev][tmpTail].ctrl1 & I82527_MSG_CTRL_NEWDAT)) {
      break;  /* Buf is full */
    }
 
    if (!(rxMsgBuf[dev][tmpTail].ctrl1 & I82527_MSG_CTRL_NEWDAT)) {
      int pkt_len;
      int i;
 
      rxMsgBuf[dev][tmpTail].ctrl0 = candev[dev]->msg15.ctrl0;
      rxMsgBuf[dev][tmpTail].ctrl1 = candev[dev]->msg15.ctrl1;
      rxMsgBuf[dev][tmpTail].arb = candev[dev]->msg15.arb;
      rxMsgBuf[dev][tmpTail].cfg = candev[dev]->msg15.cfg;
 
      pkt_len = (rxMsgBuf[dev][tmpTail].cfg >> 4) & 0xf;
      for (i=0; i<pkt_len; i++) {
        rxMsgBuf[dev][tmpTail].data[i] = candev[dev]->msg15.data[i];
      }
 
      tmpTail++;
      if (tmpTail == RX_CAN_BUF_SIZE) {
        tmpTail = 0;
      }
 
      rxMsgBufTail[dev] = tmpTail;
 
      break;
    }
 
    tmpTail++;
    if (tmpTail == RX_CAN_BUF_SIZE) {
      tmpTail = 0;
    }
    if (tmpTail == rxMsgBufTail[dev]) {
      break;
    }
  }
 
 
  candev[dev]->msg15.ctrl0  = 0xff & (I82527_MSG_CTRL_MSGVAL_SET |
                                      I82527_MSG_CTRL_INTPND_CLR);
  candev[dev]->msg15.ctrl1  = 0xff & (I82527_MSG_CTRL_NEWDAT_CLR |
                                      I82527_MSG_CTRL_RMTPND_CLR);
  candev[dev]->status = 0x0;
}
 
rtems_device_driver canbus_initialize(
  rtems_device_major_number  major,
  rtems_device_minor_number  minor,
  void                      *arg
)
{
  int i,j;
  char dev_str[16]; /* This allows us to have a device name up to */
                    /* 15 chars long. If we only use names like   */
                    /* /dev/can0 (9 chars) we will be fine up to  */
                    /* /dev/can9999999 */
  rtems_status_code status;
  rtems_isr_entry old_handler;
 
#if (NUM_CAN_DEVS > 0)
  candev[0]=&canbus0;
  rtems_interrupt_catch (canInterruptHandler,
                         PPC_IRQ_IRQ3,
                         &old_handler);
 
#if (NUM_CAN_DEVS > 1)
  candev[1]=&canbus1;
  rtems_interrupt_catch (canInterruptHandler,
                         PPC_IRQ_IRQ4,
                         &old_handler);
 
#if (NUM_CAN_DEVS > 2)
  candev[2]=&canbus2;
  rtems_interrupt_catch (canInterruptHandler,
                         PPC_IRQ_IRQ2,
                         &old_handler);
 
  /* Right now, we only support 3 CAN interfaces */
#else
#error NUM_CAN_DEVS is too big. Fix it, damnit!
#endif /* NUM_CAN_DEVS > 2 */
#endif /* NUM_CAN_DEVS > 1 */
#else
#error NUM_CAN_DEVS is 0. It needs to be at least 1
#endif /* NUM_CAN_DEVS > 0 */
 
 
  for (i=0; i < NUM_CAN_DEVS; i++) {
 
    /* clear rx buffers */
    rxMsgBufHead[i] = 0;
    rxMsgBufTail[i] = 0;
    for (j=0; j < RX_CAN_BUF_SIZE; j++) {
      rxMsgBuf[i][j].ctrl0 = 0x55; /* all flags are cleared */
      rxMsgBuf[i][j].ctrl1 = 0x55; /* all flags are cleared */
    }
 
    candev[i]->ctrl = I82527_CTRL_CCE | /* Enable cfg reg writes */
                      I82527_CTRL_INIT; /* Disable external xfers */
 
    candev[i]->cir = I82527_CIR_DMC;    /* Divide memory clock by 2 */
 
 
    /* We want 250 kbps so assuming an input clock rate of 10 MHz:
     *   DSC = 0  =>  SCLK = 10 MHz, tSCLK = 100ns
     *   BRP = 1  =>  tq = 200ns
     *   tSYNC_SEG = 1 tq
     *   tSEG1 = TSEG1+1 = 14+1 = 15
     *   tSEG2 = TSEG2+1 = 3+1  = 4
     *
     *  bittime = tSYNC_SEG + tSEG1 + tSEG2
     *          = 1 + 15 + 4 = 20
     *  baudrate = 1/(bittime * tq) = 1/(20 * 200ns) = 1/(4000ns) = 250 kbps
     */
    candev[i]->btr0 = 0xc1;  /* Baud rate prescaler=0, Sync jump width=3 */
 
    candev[i]->btr1 = I82527_BTR1_SPL | /* go for noise immunity */
                      (0x3 << 4) |      /* TSEG2 = 3 */
                      (0xe);            /* TSEG1 = 14 */
 
    candev[i]->gms = 0xffff;            /* addresses must match exactly */
    candev[i]->gml = 0xffffffff;        /* addresses must match exactly */
 
    candev[i]->mlm = 0x0;               /* all addresses accepted */
 
    candev[i]->p2conf = 0xff;           /* make all outputs */
 
    candev[i]->msg1.cfg    = I82527_MSG_CFG_DIR ;        /* dir is xmit */
    candev[i]->msg1.ctrl0  = I82527_MSG_CTRL_MSGVAL_CLR |/* this msg invalid */
                             I82527_MSG_CTRL_TXIE_CLR   |/* no tx interrupts */
                             I82527_MSG_CTRL_RXIE_CLR   |/* no rx interrupts */
                             I82527_MSG_CTRL_INTPND_CLR;
 
    candev[i]->msg2.cfg    = I82527_MSG_CFG_DIR ;        /* dir is xmit */
    candev[i]->msg2.ctrl0  = I82527_MSG_CTRL_MSGVAL_CLR |/* this msg invalid */
                             I82527_MSG_CTRL_TXIE_CLR   |/* no tx interrupts */
                             I82527_MSG_CTRL_RXIE_CLR   |/* no rx interrupts */
                             I82527_MSG_CTRL_INTPND_CLR;
 
    candev[i]->msg3.cfg    = I82527_MSG_CFG_DIR ;        /* dir is xmit */
    candev[i]->msg3.ctrl0  = I82527_MSG_CTRL_MSGVAL_CLR |/* this msg invalid */
                             I82527_MSG_CTRL_TXIE_CLR   |/* no tx interrupts */
                             I82527_MSG_CTRL_RXIE_CLR   |/* no rx interrupts */
                             I82527_MSG_CTRL_INTPND_CLR;
 
    candev[i]->msg4.cfg    = I82527_MSG_CFG_DIR ;        /* dir is xmit */
    candev[i]->msg4.ctrl0  = I82527_MSG_CTRL_MSGVAL_CLR |/* this msg invalid */
                             I82527_MSG_CTRL_TXIE_CLR   |/* no tx interrupts */
                             I82527_MSG_CTRL_RXIE_CLR  | /* no rx interrupts */
                             I82527_MSG_CTRL_INTPND_CLR;
 
    candev[i]->msg5.cfg    = I82527_MSG_CFG_DIR ;        /* dir is xmit */
    candev[i]->msg5.ctrl0  = I82527_MSG_CTRL_MSGVAL_CLR |/* this msg invalid */
                             I82527_MSG_CTRL_TXIE_CLR   |/* no tx interrupts */
                             I82527_MSG_CTRL_RXIE_CLR   |/* no rx interrupts */
                             I82527_MSG_CTRL_INTPND_CLR;
 
    candev[i]->msg6.cfg    = I82527_MSG_CFG_DIR ;        /* dir is xmit */
    candev[i]->msg6.ctrl0  = I82527_MSG_CTRL_MSGVAL_CLR |/* this msg invalid */
                             I82527_MSG_CTRL_TXIE_CLR   |/* no tx interrupts */
                             I82527_MSG_CTRL_RXIE_CLR   |/* no rx interrupts */
                             I82527_MSG_CTRL_INTPND_CLR;
 
    candev[i]->msg7.cfg    = I82527_MSG_CFG_DIR ;        /* dir is xmit */
    candev[i]->msg7.ctrl0  = I82527_MSG_CTRL_MSGVAL_CLR |/* this msg invalid */
                             I82527_MSG_CTRL_TXIE_CLR   |/* no tx interrupts */
                             I82527_MSG_CTRL_RXIE_CLR   |/* no rx interrupts */
                             I82527_MSG_CTRL_INTPND_CLR;
 
    candev[i]->msg8.cfg    = I82527_MSG_CFG_DIR ;        /* dir is xmit */
    candev[i]->msg8.ctrl0  = I82527_MSG_CTRL_MSGVAL_CLR |/* this msg invalid */
                             I82527_MSG_CTRL_TXIE_CLR   |/* no tx interrupts */
                             I82527_MSG_CTRL_RXIE_CLR   |/* no rx interrupts */
                             I82527_MSG_CTRL_INTPND_CLR;
 
    candev[i]->msg9.cfg    = I82527_MSG_CFG_DIR ;        /* dir is xmit */
    candev[i]->msg9.ctrl0  = I82527_MSG_CTRL_MSGVAL_CLR |/* this msg invalid */
                             I82527_MSG_CTRL_TXIE_CLR   |/* no tx interrupts */
                             I82527_MSG_CTRL_RXIE_CLR   |/* no rx interrupts */
                             I82527_MSG_CTRL_INTPND_CLR;
 
    candev[i]->msg10.cfg   = I82527_MSG_CFG_DIR ;        /* dir is xmit */
    candev[i]->msg10.ctrl0 = I82527_MSG_CTRL_MSGVAL_CLR |/* this msg invalid */
                             I82527_MSG_CTRL_TXIE_CLR   |/* no tx interrupts */
                             I82527_MSG_CTRL_RXIE_CLR  | /* no rx interrupts */
                             I82527_MSG_CTRL_INTPND_CLR;
 
    candev[i]->msg11.cfg   = I82527_MSG_CFG_DIR ;        /* dir is xmit */
    candev[i]->msg11.ctrl0 = I82527_MSG_CTRL_MSGVAL_CLR |/* this msg invalid */
                             I82527_MSG_CTRL_TXIE_CLR   |/* no tx interrupts */
                             I82527_MSG_CTRL_RXIE_CLR   |/* no rx interrupts */
                             I82527_MSG_CTRL_INTPND_CLR;
 
    candev[i]->msg12.cfg   = I82527_MSG_CFG_DIR ;        /* dir is xmit */
    candev[i]->msg12.ctrl0 = I82527_MSG_CTRL_MSGVAL_CLR |/* this msg invalid */
                             I82527_MSG_CTRL_TXIE_CLR   |/* no tx interrupts */
                             I82527_MSG_CTRL_RXIE_CLR   |/* no rx interrupts */
                             I82527_MSG_CTRL_INTPND_CLR;
 
    candev[i]->msg13.cfg   = I82527_MSG_CFG_DIR ;        /* dir is xmit */
    candev[i]->msg13.ctrl0 = I82527_MSG_CTRL_MSGVAL_CLR |/* this msg invalid */
                             I82527_MSG_CTRL_TXIE_CLR   |/* no tx interrupts */
                             I82527_MSG_CTRL_RXIE_CLR   |/* no rx interrupts */
                             I82527_MSG_CTRL_INTPND_CLR;
 
    candev[i]->msg14.cfg   = I82527_MSG_CFG_DIR ;        /* dir is xmit */
    candev[i]->msg14.ctrl0 = I82527_MSG_CTRL_MSGVAL_CLR |/* this msg invalid */
                             I82527_MSG_CTRL_TXIE_CLR   |/* no tx interrupts */
                             I82527_MSG_CTRL_RXIE_CLR   |/* no rx interrupts */
                             I82527_MSG_CTRL_INTPND_CLR;
 
    candev[i]->msg15.cfg   = 0 ;        /* dir is rcv */
    candev[i]->msg15.ctrl0 = I82527_MSG_CTRL_MSGVAL_CLR |/* this msg invalid */
                             I82527_MSG_CTRL_TXIE_CLR   |/* no tx interrupts */
                             I82527_MSG_CTRL_RXIE_CLR   |/* no rx interrupts */
                             I82527_MSG_CTRL_INTPND_CLR;
    candev[i]->msg15.ctrl1 = I82527_MSG_CTRL_RMTPND_CLR |
                             I82527_MSG_CTRL_TXRQ_CLR   |
                             I82527_MSG_CTRL_MSGLST_CLR |
                             I82527_MSG_CTRL_NEWDAT_CLR;
 
  }
 
  if ((status=rtems_io_register_name ("/dev/can0", major, 0)) !=
      RTEMS_SUCCESSFUL) {
    rtems_fatal_error_occurred (status);
  }
  if ((status=rtems_io_register_name ("/dev/can1", major, 1)) !=
      RTEMS_SUCCESSFUL) {
    rtems_fatal_error_occurred (status);
  }
  if ((status=rtems_io_register_name ("/dev/can2", major, 2)) !=
      RTEMS_SUCCESSFUL) {
    rtems_fatal_error_occurred (status);
  }
  return RTEMS_SUCCESSFUL;
}
 
rtems_device_driver canbus_open(
  rtems_device_major_number major,
  rtems_device_minor_number minor,
  void                    * arg
)
{
    /* msg is in use, rx interrupts are enabled */
  candev[minor]->msg15.ctrl0 = 0xff & (I82527_MSG_CTRL_MSGVAL_SET |
                                       I82527_MSG_CTRL_RXIE_SET);
 
  candev[minor]->ctrl |= I82527_CTRL_IE;
  candev[minor]->ctrl &= ~(I82527_CTRL_CCE | I82527_CTRL_INIT);
  switch (minor) {
  case 0: m860.simask |= M860_SIMASK_IRM3; break;
  case 1: m860.simask |= M860_SIMASK_IRM4; break;
  case 2: m860.simask |= M860_SIMASK_IRM2; break;
  default: return;
  }
 
  return RTEMS_SUCCESSFUL;
}
 
rtems_device_driver canbus_close(
  rtems_device_major_number major,
  rtems_device_minor_number minor,
  void                    * arg
)
{
  /* msg is not in use, rx & txinterrupts are disbled */
  candev[minor]->msg15.ctrl0 = 0xff & (I82527_MSG_CTRL_MSGVAL_CLR |
                                       I82527_MSG_CTRL_RXIE_CLR |
                                       I82527_MSG_CTRL_TXIE_CLR);
 
  /* Take transceiver off the bus, enable cfg. reg. writes */
  candev[minor]->ctrl |= (I82527_CTRL_CCE | I82527_CTRL_INIT);
 
  return RTEMS_SUCCESSFUL;
}
 
 
rtems_device_driver canbus_read(
  rtems_device_major_number major,
  rtems_device_minor_number minor,
  void                    * arg
)
{
  i82527_msg_t *msg;
  int i;
  int tmpHead;
 
  msg = arg;
  tmpHead = rxMsgBufHead[minor];
 
  while (1){
    if ((tmpHead == rxMsgBufTail[minor]) &&
        !(rxMsgBuf[minor][tmpHead].ctrl1 & I82527_MSG_CTRL_NEWDAT)) {
      break;
    }
    if (rxMsgBuf[minor][tmpHead].ctrl1 & I82527_MSG_CTRL_NEWDAT) {
      int pkt_len;
      msg->ctrl0 = rxMsgBuf[minor][tmpHead].ctrl0;
      msg->ctrl1 = rxMsgBuf[minor][tmpHead].ctrl1;
      msg->arb = rxMsgBuf[minor][tmpHead].arb;
      msg->cfg = rxMsgBuf[minor][tmpHead].cfg;
 
      pkt_len = (msg->cfg >> 4) & 0xf;
      for (i=0; i<pkt_len; i++) {
        msg->data[i] = rxMsgBuf[minor][tmpHead].data[i];
      }
      rxMsgBuf[minor][tmpHead].ctrl1 = 0xff & I82527_MSG_CTRL_NEWDAT_CLR;
 
      tmpHead++;
      if (tmpHead == RX_CAN_BUF_SIZE) {
        tmpHead = 0;
      }
      rxMsgBufHead[minor] = tmpHead;
 
      return RTEMS_SUCCESSFUL;
 
    }
 
    tmpHead++;
    if (tmpHead == RX_CAN_BUF_SIZE) {
      tmpHead = 0;
    }
    if (tmpHead == rxMsgBufHead[minor]) {
      break;
    }
  }
 
  return RTEMS_UNSATISFIED;
 
}
 
rtems_device_driver canbus_write(
  rtems_device_major_number major,
  rtems_device_minor_number minor,
  void                    * arg
)
{
  i82527_msg_t *msg;
  int i;
 
  msg = arg;
  while(candev[minor]->msg1.ctrl1 & I82527_MSG_CTRL_TXRQ){
    continue;
  }
  candev[minor]->msg1.ctrl1  = 0xff & I82527_MSG_CTRL_CPUUPD_SET;
 
  candev[minor]->msg1.cfg = msg->cfg;
  candev[minor]->msg1.arb = msg->arb;
 
  for (i=0; i < ((msg->cfg >> 4) & 0xff);  i++) {
    candev[minor]->msg1.data[i] = msg->data[i];
  }
 
  candev[minor]->msg1.ctrl0  = 0xff & (I82527_MSG_CTRL_INTPND_CLR |
                                       I82527_MSG_CTRL_MSGVAL_SET |
                                       I82527_MSG_CTRL_TXIE_CLR);
  candev[minor]->msg1.cfg    |= I82527_MSG_CFG_DIR;
  candev[minor]->msg1.ctrl1  = 0xff & (I82527_MSG_CTRL_NEWDAT_SET |
                                       I82527_MSG_CTRL_CPUUPD_CLR |
                                       I82527_MSG_CTRL_TXRQ_SET);
 
 
 
  return RTEMS_SUCCESSFUL;
}
rtems_device_driver canbus_control(
  rtems_device_major_number major,
  rtems_device_minor_number minor,
  void                    * arg
)
{
  return RTEMS_SUCCESSFUL;
}
 
 
/* part of old canbus_read */
#if 0 
  for (i=0; i < RX_CAN_BUF_SIZE) {
    if (rxMsgBuf[minor][i].ctrl1 & I82527_MSG_CTRL_NEWDAT)
      break;
  }
 
  if (i < RX_CAN_BUF_SIZE) {
    int pkt_len;
    int j;
    msg.arb = rxMsgBuf[minor][i].arb;
    msg.cfg = rxMsgBuf[minor][i].cfg;
 
    pkt_len = (msg.cfg >> 4) & 0xf;
 
    for (j=0; j < pkt_len; j++)
      msg.data[j] = rxMsgBuf[minor][i].data[j];
 
 
  /* wait until there is a msg */
  while (!(candev->msg15.ctrl1 & I82527_MSG_CTRL_NEWDAT))
     continue;
 
  msg->ctrl1 = candev->msg15.ctrl1;
  msg->cfg = candev->msg15.cfg;
  msg->arb = candev->msg15.arb;
 
  for (i=0; i < ((candev->msg15.cfg >> 4) & 0xff);  i++) {
    msg->data[i] = candev->msg15.data[i];
  }
 
  candev->msg15.ctrl0  = 0xff & (I82527_MSG_CTRL_MSGVAL_SET |
                                 I82527_MSG_CTRL_INTPND_CLR);
  candev->msg15.ctrl1  = 0xff & (I82527_MSG_CTRL_NEWDAT_CLR |
                                 I82527_MSG_CTRL_RMTPND_CLR);
 
  candev->status = 0x0;
 
 
  return RTEMS_SUCCESSFUL;
#endif
 
 

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[/] [openrisc/] [trunk/] [rtos/] [rtems/] [c/] [src/] [lib/] [libbsp/] [powerpc/] [eth_comm/] [canbus/] [canbus.c] - Blame information for rev 173

Line No.	Rev	Author	Line
1	30	unneback	`/*`
2			`* RTEMS CANBUS driver for eth-comm BSP`
3			`*`
4			`* Written by Jay Monkman (jmonkman@frasca.com)`
5			`*`
6			`* COPYRIGHT (c) 1998`
7			`* Frasca International, Inc.`
8			`*`
9			`* The license and distribution terms for this file may be`
10			`* found in the file LICENSE in this distribution or at`
11			`* http://www.OARcorp.com/rtems/license.html.`
12			`*`
13			`* Note: All of this code assumes a 10Mhz clock input to the 82527`
14			`*`
15			`* $Id: canbus.c,v 1.2 2001-09-27 12:00:35 chris Exp $`
16			`*/`
17			`#include <stdio.h>`
18			`#include <bsp.h>`
19			`#include <mpc860.h>`
20			`#include <rtems/error.h>`
21			`#include <canbus.h>`
22			`/* How many CAN interfaces are there? */`
23			`#define NUM_CAN_DEVS 3`
24
25			`/* How many received messages should be buffered for each channel */`
26			`#define RX_CAN_BUF_SIZE 16`
27
28			`int rxMsgBufHead[NUM_CAN_DEVS];`
29			`int rxMsgBufTail[NUM_CAN_DEVS];`
30			`i82527_msg_t rxMsgBuf[NUM_CAN_DEVS][RX_CAN_BUF_SIZE];`
31
32			`volatile i82527_t *candev[NUM_CAN_DEVS];`
33
34
35			`static rtems_isr`
36			`canInterruptHandler (rtems_vector_number v)`
37			`{`
38			`int dev;`
39			`int tmpTail;`
40
41			`switch (v) {`
42			`case PPC_IRQ_IRQ3: dev = 0; break;`
43			`case PPC_IRQ_IRQ4: dev = 1; break;`
44			`case PPC_IRQ_IRQ2: dev = 2; break;`
45			`default: return; /* something screwed up */`
46			`}`
47
48			`/* we only do rx interrupts right now */`
49			`if (!(candev[dev]->msg15.ctrl1 & I82527_MSG_CTRL_NEWDAT)) {`
50			`/* Hmmm, that's odd. Why were we triggered? */`
51			`candev[dev]->msg15.ctrl0 = 0xff & (I82527_MSG_CTRL_INTPND_CLR \|`
52			`I82527_MSG_CTRL_MSGVAL_SET);`
53			`candev[dev]->msg15.ctrl1 = 0xff & (I82527_MSG_CTRL_RMTPND_CLR \|`
54			`I82527_MSG_CTRL_MSGLST_CLR \|`
55			`I82527_MSG_CTRL_NEWDAT_CLR);`
56			`return;`
57			`}`
58			`tmpTail = rxMsgBufTail[dev];`
59			`while (1) {`
60			`if ((tmpTail == rxMsgBufHead[dev]) &&`
61			`(rxMsgBuf[dev][tmpTail].ctrl1 & I82527_MSG_CTRL_NEWDAT)) {`
62			`break; /* Buf is full */`
63			`}`
64
65			`if (!(rxMsgBuf[dev][tmpTail].ctrl1 & I82527_MSG_CTRL_NEWDAT)) {`
66			`int pkt_len;`
67			`int i;`
68
69			`rxMsgBuf[dev][tmpTail].ctrl0 = candev[dev]->msg15.ctrl0;`
70			`rxMsgBuf[dev][tmpTail].ctrl1 = candev[dev]->msg15.ctrl1;`
71			`rxMsgBuf[dev][tmpTail].arb = candev[dev]->msg15.arb;`
72			`rxMsgBuf[dev][tmpTail].cfg = candev[dev]->msg15.cfg;`
73
74			`pkt_len = (rxMsgBuf[dev][tmpTail].cfg >> 4) & 0xf;`
75			`for (i=0; i<pkt_len; i++) {`
76			`rxMsgBuf[dev][tmpTail].data[i] = candev[dev]->msg15.data[i];`
77			`}`
78
79			`tmpTail++;`
80			`if (tmpTail == RX_CAN_BUF_SIZE) {`
81			`tmpTail = 0;`
82			`}`
83
84			`rxMsgBufTail[dev] = tmpTail;`
85
86			`break;`
87			`}`
88
89			`tmpTail++;`
90			`if (tmpTail == RX_CAN_BUF_SIZE) {`
91			`tmpTail = 0;`
92			`}`
93			`if (tmpTail == rxMsgBufTail[dev]) {`
94			`break;`
95			`}`
96			`}`
97
98
99			`candev[dev]->msg15.ctrl0 = 0xff & (I82527_MSG_CTRL_MSGVAL_SET \|`
100			`I82527_MSG_CTRL_INTPND_CLR);`
101			`candev[dev]->msg15.ctrl1 = 0xff & (I82527_MSG_CTRL_NEWDAT_CLR \|`
102			`I82527_MSG_CTRL_RMTPND_CLR);`
103			`candev[dev]->status = 0x0;`
104			`}`
105
106			`rtems_device_driver canbus_initialize(`
107			`rtems_device_major_number major,`
108			`rtems_device_minor_number minor,`
109			`void *arg`
110			`)`
111			`{`
112			`int i,j;`
113			`char dev_str[16]; /* This allows us to have a device name up to */`
114			`/* 15 chars long. If we only use names like */`
115			`/* /dev/can0 (9 chars) we will be fine up to */`
116			`/* /dev/can9999999 */`
117			`rtems_status_code status;`
118			`rtems_isr_entry old_handler;`
119
120			`#if (NUM_CAN_DEVS > 0)`
121			`candev[0]=&canbus0;`
122			`rtems_interrupt_catch (canInterruptHandler,`
123			`PPC_IRQ_IRQ3,`
124			`&old_handler);`
125
126			`#if (NUM_CAN_DEVS > 1)`
127			`candev[1]=&canbus1;`
128			`rtems_interrupt_catch (canInterruptHandler,`
129			`PPC_IRQ_IRQ4,`
130			`&old_handler);`
131
132			`#if (NUM_CAN_DEVS > 2)`
133			`candev[2]=&canbus2;`
134			`rtems_interrupt_catch (canInterruptHandler,`
135			`PPC_IRQ_IRQ2,`
136			`&old_handler);`
137
138			`/* Right now, we only support 3 CAN interfaces */`
139			`#else`
140			`#error NUM_CAN_DEVS is too big. Fix it, damnit!`
141			`#endif /* NUM_CAN_DEVS > 2 */`
142			`#endif /* NUM_CAN_DEVS > 1 */`
143			`#else`
144			`#error NUM_CAN_DEVS is 0. It needs to be at least 1`
145			`#endif /* NUM_CAN_DEVS > 0 */`
146
147
148			`for (i=0; i < NUM_CAN_DEVS; i++) {`
149
150			`/* clear rx buffers */`
151			`rxMsgBufHead[i] = 0;`
152			`rxMsgBufTail[i] = 0;`
153			`for (j=0; j < RX_CAN_BUF_SIZE; j++) {`
154			`rxMsgBuf[i][j].ctrl0 = 0x55; /* all flags are cleared */`
155			`rxMsgBuf[i][j].ctrl1 = 0x55; /* all flags are cleared */`
156			`}`
157
158			`candev[i]->ctrl = I82527_CTRL_CCE \| /* Enable cfg reg writes */`
159			`I82527_CTRL_INIT; /* Disable external xfers */`
160
161			`candev[i]->cir = I82527_CIR_DMC; /* Divide memory clock by 2 */`
162
163
164			`/* We want 250 kbps so assuming an input clock rate of 10 MHz:`
165			`* DSC = 0 => SCLK = 10 MHz, tSCLK = 100ns`
166			`* BRP = 1 => tq = 200ns`
167			`* tSYNC_SEG = 1 tq`
168			`* tSEG1 = TSEG1+1 = 14+1 = 15`
169			`* tSEG2 = TSEG2+1 = 3+1 = 4`
170			`*`
171			`* bittime = tSYNC_SEG + tSEG1 + tSEG2`
172			`* = 1 + 15 + 4 = 20`
173			`* baudrate = 1/(bittime * tq) = 1/(20 * 200ns) = 1/(4000ns) = 250 kbps`
174			`*/`
175			`candev[i]->btr0 = 0xc1; /* Baud rate prescaler=0, Sync jump width=3 */`
176
177			`candev[i]->btr1 = I82527_BTR1_SPL \| /* go for noise immunity */`
178			`(0x3 << 4) \| /* TSEG2 = 3 */`
179			`(0xe); /* TSEG1 = 14 */`
180
181			`candev[i]->gms = 0xffff; /* addresses must match exactly */`
182			`candev[i]->gml = 0xffffffff; /* addresses must match exactly */`
183
184			`candev[i]->mlm = 0x0; /* all addresses accepted */`
185
186			`candev[i]->p2conf = 0xff; /* make all outputs */`
187
188			`candev[i]->msg1.cfg = I82527_MSG_CFG_DIR ; /* dir is xmit */`
189			`candev[i]->msg1.ctrl0 = I82527_MSG_CTRL_MSGVAL_CLR \|/* this msg invalid */`
190			`I82527_MSG_CTRL_TXIE_CLR \|/* no tx interrupts */`
191			`I82527_MSG_CTRL_RXIE_CLR \|/* no rx interrupts */`
192			`I82527_MSG_CTRL_INTPND_CLR;`
193
194			`candev[i]->msg2.cfg = I82527_MSG_CFG_DIR ; /* dir is xmit */`
195			`candev[i]->msg2.ctrl0 = I82527_MSG_CTRL_MSGVAL_CLR \|/* this msg invalid */`
196			`I82527_MSG_CTRL_TXIE_CLR \|/* no tx interrupts */`
197			`I82527_MSG_CTRL_RXIE_CLR \|/* no rx interrupts */`
198			`I82527_MSG_CTRL_INTPND_CLR;`
199
200			`candev[i]->msg3.cfg = I82527_MSG_CFG_DIR ; /* dir is xmit */`
201			`candev[i]->msg3.ctrl0 = I82527_MSG_CTRL_MSGVAL_CLR \|/* this msg invalid */`
202			`I82527_MSG_CTRL_TXIE_CLR \|/* no tx interrupts */`
203			`I82527_MSG_CTRL_RXIE_CLR \|/* no rx interrupts */`
204			`I82527_MSG_CTRL_INTPND_CLR;`
205
206			`candev[i]->msg4.cfg = I82527_MSG_CFG_DIR ; /* dir is xmit */`
207			`candev[i]->msg4.ctrl0 = I82527_MSG_CTRL_MSGVAL_CLR \|/* this msg invalid */`
208			`I82527_MSG_CTRL_TXIE_CLR \|/* no tx interrupts */`
209			`I82527_MSG_CTRL_RXIE_CLR \| /* no rx interrupts */`
210			`I82527_MSG_CTRL_INTPND_CLR;`
211
212			`candev[i]->msg5.cfg = I82527_MSG_CFG_DIR ; /* dir is xmit */`
213			`candev[i]->msg5.ctrl0 = I82527_MSG_CTRL_MSGVAL_CLR \|/* this msg invalid */`
214			`I82527_MSG_CTRL_TXIE_CLR \|/* no tx interrupts */`
215			`I82527_MSG_CTRL_RXIE_CLR \|/* no rx interrupts */`
216			`I82527_MSG_CTRL_INTPND_CLR;`
217
218			`candev[i]->msg6.cfg = I82527_MSG_CFG_DIR ; /* dir is xmit */`
219			`candev[i]->msg6.ctrl0 = I82527_MSG_CTRL_MSGVAL_CLR \|/* this msg invalid */`
220			`I82527_MSG_CTRL_TXIE_CLR \|/* no tx interrupts */`
221			`I82527_MSG_CTRL_RXIE_CLR \|/* no rx interrupts */`
222			`I82527_MSG_CTRL_INTPND_CLR;`
223
224			`candev[i]->msg7.cfg = I82527_MSG_CFG_DIR ; /* dir is xmit */`
225			`candev[i]->msg7.ctrl0 = I82527_MSG_CTRL_MSGVAL_CLR \|/* this msg invalid */`
226			`I82527_MSG_CTRL_TXIE_CLR \|/* no tx interrupts */`
227			`I82527_MSG_CTRL_RXIE_CLR \|/* no rx interrupts */`
228			`I82527_MSG_CTRL_INTPND_CLR;`
229
230			`candev[i]->msg8.cfg = I82527_MSG_CFG_DIR ; /* dir is xmit */`
231			`candev[i]->msg8.ctrl0 = I82527_MSG_CTRL_MSGVAL_CLR \|/* this msg invalid */`
232			`I82527_MSG_CTRL_TXIE_CLR \|/* no tx interrupts */`
233			`I82527_MSG_CTRL_RXIE_CLR \|/* no rx interrupts */`
234			`I82527_MSG_CTRL_INTPND_CLR;`
235
236			`candev[i]->msg9.cfg = I82527_MSG_CFG_DIR ; /* dir is xmit */`
237			`candev[i]->msg9.ctrl0 = I82527_MSG_CTRL_MSGVAL_CLR \|/* this msg invalid */`
238			`I82527_MSG_CTRL_TXIE_CLR \|/* no tx interrupts */`
239			`I82527_MSG_CTRL_RXIE_CLR \|/* no rx interrupts */`
240			`I82527_MSG_CTRL_INTPND_CLR;`
241
242			`candev[i]->msg10.cfg = I82527_MSG_CFG_DIR ; /* dir is xmit */`
243			`candev[i]->msg10.ctrl0 = I82527_MSG_CTRL_MSGVAL_CLR \|/* this msg invalid */`
244			`I82527_MSG_CTRL_TXIE_CLR \|/* no tx interrupts */`
245			`I82527_MSG_CTRL_RXIE_CLR \| /* no rx interrupts */`
246			`I82527_MSG_CTRL_INTPND_CLR;`
247
248			`candev[i]->msg11.cfg = I82527_MSG_CFG_DIR ; /* dir is xmit */`
249			`candev[i]->msg11.ctrl0 = I82527_MSG_CTRL_MSGVAL_CLR \|/* this msg invalid */`
250			`I82527_MSG_CTRL_TXIE_CLR \|/* no tx interrupts */`
251			`I82527_MSG_CTRL_RXIE_CLR \|/* no rx interrupts */`
252			`I82527_MSG_CTRL_INTPND_CLR;`
253
254			`candev[i]->msg12.cfg = I82527_MSG_CFG_DIR ; /* dir is xmit */`
255			`candev[i]->msg12.ctrl0 = I82527_MSG_CTRL_MSGVAL_CLR \|/* this msg invalid */`
256			`I82527_MSG_CTRL_TXIE_CLR \|/* no tx interrupts */`
257			`I82527_MSG_CTRL_RXIE_CLR \|/* no rx interrupts */`
258			`I82527_MSG_CTRL_INTPND_CLR;`
259
260			`candev[i]->msg13.cfg = I82527_MSG_CFG_DIR ; /* dir is xmit */`
261			`candev[i]->msg13.ctrl0 = I82527_MSG_CTRL_MSGVAL_CLR \|/* this msg invalid */`
262			`I82527_MSG_CTRL_TXIE_CLR \|/* no tx interrupts */`
263			`I82527_MSG_CTRL_RXIE_CLR \|/* no rx interrupts */`
264			`I82527_MSG_CTRL_INTPND_CLR;`
265
266			`candev[i]->msg14.cfg = I82527_MSG_CFG_DIR ; /* dir is xmit */`
267			`candev[i]->msg14.ctrl0 = I82527_MSG_CTRL_MSGVAL_CLR \|/* this msg invalid */`
268			`I82527_MSG_CTRL_TXIE_CLR \|/* no tx interrupts */`
269			`I82527_MSG_CTRL_RXIE_CLR \|/* no rx interrupts */`
270			`I82527_MSG_CTRL_INTPND_CLR;`
271
272			`candev[i]->msg15.cfg = 0 ; /* dir is rcv */`
273			`candev[i]->msg15.ctrl0 = I82527_MSG_CTRL_MSGVAL_CLR \|/* this msg invalid */`
274			`I82527_MSG_CTRL_TXIE_CLR \|/* no tx interrupts */`
275			`I82527_MSG_CTRL_RXIE_CLR \|/* no rx interrupts */`
276			`I82527_MSG_CTRL_INTPND_CLR;`
277			`candev[i]->msg15.ctrl1 = I82527_MSG_CTRL_RMTPND_CLR \|`
278			`I82527_MSG_CTRL_TXRQ_CLR \|`
279			`I82527_MSG_CTRL_MSGLST_CLR \|`
280			`I82527_MSG_CTRL_NEWDAT_CLR;`
281
282			`}`
283
284			`if ((status=rtems_io_register_name ("/dev/can0", major, 0)) !=`
285			`RTEMS_SUCCESSFUL) {`
286			`rtems_fatal_error_occurred (status);`
287			`}`
288			`if ((status=rtems_io_register_name ("/dev/can1", major, 1)) !=`
289			`RTEMS_SUCCESSFUL) {`
290			`rtems_fatal_error_occurred (status);`
291			`}`
292			`if ((status=rtems_io_register_name ("/dev/can2", major, 2)) !=`
293			`RTEMS_SUCCESSFUL) {`
294			`rtems_fatal_error_occurred (status);`
295			`}`
296			`return RTEMS_SUCCESSFUL;`
297			`}`
298
299			`rtems_device_driver canbus_open(`
300			`rtems_device_major_number major,`
301			`rtems_device_minor_number minor,`
302			`void * arg`
303			`)`
304			`{`
305			`/* msg is in use, rx interrupts are enabled */`
306			`candev[minor]->msg15.ctrl0 = 0xff & (I82527_MSG_CTRL_MSGVAL_SET \|`
307			`I82527_MSG_CTRL_RXIE_SET);`
308
309			`candev[minor]->ctrl \|= I82527_CTRL_IE;`
310			`candev[minor]->ctrl &= ~(I82527_CTRL_CCE \| I82527_CTRL_INIT);`
311			`switch (minor) {`
312			`case 0: m860.simask \|= M860_SIMASK_IRM3; break;`
313			`case 1: m860.simask \|= M860_SIMASK_IRM4; break;`
314			`case 2: m860.simask \|= M860_SIMASK_IRM2; break;`
315			`default: return;`
316			`}`
317
318			`return RTEMS_SUCCESSFUL;`
319			`}`
320
321			`rtems_device_driver canbus_close(`
322			`rtems_device_major_number major,`
323			`rtems_device_minor_number minor,`
324			`void * arg`
325			`)`
326			`{`
327			`/* msg is not in use, rx & txinterrupts are disbled */`
328			`candev[minor]->msg15.ctrl0 = 0xff & (I82527_MSG_CTRL_MSGVAL_CLR \|`
329			`I82527_MSG_CTRL_RXIE_CLR \|`
330			`I82527_MSG_CTRL_TXIE_CLR);`
331
332			`/* Take transceiver off the bus, enable cfg. reg. writes */`
333			`candev[minor]->ctrl \|= (I82527_CTRL_CCE \| I82527_CTRL_INIT);`
334
335			`return RTEMS_SUCCESSFUL;`
336			`}`
337
338
339			`rtems_device_driver canbus_read(`
340			`rtems_device_major_number major,`
341			`rtems_device_minor_number minor,`
342			`void * arg`
343			`)`
344			`{`
345			`i82527_msg_t *msg;`
346			`int i;`
347			`int tmpHead;`
348
349			`msg = arg;`
350			`tmpHead = rxMsgBufHead[minor];`
351
352			`while (1){`
353			`if ((tmpHead == rxMsgBufTail[minor]) &&`
354			`!(rxMsgBuf[minor][tmpHead].ctrl1 & I82527_MSG_CTRL_NEWDAT)) {`
355			`break;`
356			`}`
357			`if (rxMsgBuf[minor][tmpHead].ctrl1 & I82527_MSG_CTRL_NEWDAT) {`
358			`int pkt_len;`
359			`msg->ctrl0 = rxMsgBuf[minor][tmpHead].ctrl0;`
360			`msg->ctrl1 = rxMsgBuf[minor][tmpHead].ctrl1;`
361			`msg->arb = rxMsgBuf[minor][tmpHead].arb;`
362			`msg->cfg = rxMsgBuf[minor][tmpHead].cfg;`
363
364			`pkt_len = (msg->cfg >> 4) & 0xf;`
365			`for (i=0; i<pkt_len; i++) {`
366			`msg->data[i] = rxMsgBuf[minor][tmpHead].data[i];`
367			`}`
368			`rxMsgBuf[minor][tmpHead].ctrl1 = 0xff & I82527_MSG_CTRL_NEWDAT_CLR;`
369
370			`tmpHead++;`
371			`if (tmpHead == RX_CAN_BUF_SIZE) {`
372			`tmpHead = 0;`
373			`}`
374			`rxMsgBufHead[minor] = tmpHead;`
375
376			`return RTEMS_SUCCESSFUL;`
377
378			`}`
379
380			`tmpHead++;`
381			`if (tmpHead == RX_CAN_BUF_SIZE) {`
382			`tmpHead = 0;`
383			`}`
384			`if (tmpHead == rxMsgBufHead[minor]) {`
385			`break;`
386			`}`
387			`}`
388
389			`return RTEMS_UNSATISFIED;`
390
391			`}`
392
393			`rtems_device_driver canbus_write(`
394			`rtems_device_major_number major,`
395			`rtems_device_minor_number minor,`
396			`void * arg`
397			`)`
398			`{`
399			`i82527_msg_t *msg;`
400			`int i;`
401
402			`msg = arg;`
403			`while(candev[minor]->msg1.ctrl1 & I82527_MSG_CTRL_TXRQ){`
404			`continue;`
405			`}`
406			`candev[minor]->msg1.ctrl1 = 0xff & I82527_MSG_CTRL_CPUUPD_SET;`
407
408			`candev[minor]->msg1.cfg = msg->cfg;`
409			`candev[minor]->msg1.arb = msg->arb;`
410
411			`for (i=0; i < ((msg->cfg >> 4) & 0xff); i++) {`
412			`candev[minor]->msg1.data[i] = msg->data[i];`
413			`}`
414
415			`candev[minor]->msg1.ctrl0 = 0xff & (I82527_MSG_CTRL_INTPND_CLR \|`
416			`I82527_MSG_CTRL_MSGVAL_SET \|`
417			`I82527_MSG_CTRL_TXIE_CLR);`
418			`candev[minor]->msg1.cfg \|= I82527_MSG_CFG_DIR;`
419			`candev[minor]->msg1.ctrl1 = 0xff & (I82527_MSG_CTRL_NEWDAT_SET \|`
420			`I82527_MSG_CTRL_CPUUPD_CLR \|`
421			`I82527_MSG_CTRL_TXRQ_SET);`
422
423
424
425			`return RTEMS_SUCCESSFUL;`
426			`}`
427			`rtems_device_driver canbus_control(`
428			`rtems_device_major_number major,`
429			`rtems_device_minor_number minor,`
430			`void * arg`
431			`)`
432			`{`
433			`return RTEMS_SUCCESSFUL;`
434			`}`
435
436
437			`/* part of old canbus_read */`
438			`#if 0`
439			`for (i=0; i < RX_CAN_BUF_SIZE) {`
440			`if (rxMsgBuf[minor][i].ctrl1 & I82527_MSG_CTRL_NEWDAT)`
441			`break;`
442			`}`
443
444			`if (i < RX_CAN_BUF_SIZE) {`
445			`int pkt_len;`
446			`int j;`
447			`msg.arb = rxMsgBuf[minor][i].arb;`
448			`msg.cfg = rxMsgBuf[minor][i].cfg;`
449
450			`pkt_len = (msg.cfg >> 4) & 0xf;`
451
452			`for (j=0; j < pkt_len; j++)`
453			`msg.data[j] = rxMsgBuf[minor][i].data[j];`
454
455
456			`/* wait until there is a msg */`
457			`while (!(candev->msg15.ctrl1 & I82527_MSG_CTRL_NEWDAT))`
458			`continue;`
459
460			`msg->ctrl1 = candev->msg15.ctrl1;`
461			`msg->cfg = candev->msg15.cfg;`
462			`msg->arb = candev->msg15.arb;`
463
464			`for (i=0; i < ((candev->msg15.cfg >> 4) & 0xff); i++) {`
465			`msg->data[i] = candev->msg15.data[i];`
466			`}`
467
468			`candev->msg15.ctrl0 = 0xff & (I82527_MSG_CTRL_MSGVAL_SET \|`
469			`I82527_MSG_CTRL_INTPND_CLR);`
470			`candev->msg15.ctrl1 = 0xff & (I82527_MSG_CTRL_NEWDAT_CLR \|`
471			`I82527_MSG_CTRL_RMTPND_CLR);`
472
473			`candev->status = 0x0;`
474
475
476			`return RTEMS_SUCCESSFUL;`
477			`#endif`
478
479