/******************************************************************************
 *
 *  msr_module.c
 *
 *  Kernelmodul für 2.6 Kernel zur Meßdatenerfassung, Steuerung und Regelung.
 *  Zeitgeber ist der Timerinterrupt (tq)
 *
 *  Autor: Wilhelm Hagemeister
 *
 *  (C) Copyright IgH 2002
 *  Ingenieurgemeinschaft IgH
 *  Heinz-Bäcker Str. 34
 *  D-45356 Essen
 *  Tel.: +49 201/61 99 31
 *  Fax.: +49 201/61 98 36
 *  E-mail: hm@igh-essen.com
 *
 *  $Id$
 *
 *****************************************************************************/

#ifndef __KERNEL__
#  define __KERNEL__
#endif
#ifndef MODULE
#  define MODULE
#endif

#include <linux/config.h>
#include <linux/module.h>

#include <linux/sched.h>
#include <linux/kernel.h>
#include <linux/vmalloc.h>
#include <linux/fs.h>     /* everything... */
#include <linux/proc_fs.h>
#include <linux/time.h>
#include <linux/timer.h>
#include <linux/timex.h>  /* fuer get_cycles */
#include <linux/errno.h>  /* error codes */
#include <asm/msr.h> /* maschine-specific registers */
#include <linux/param.h> /* fuer HZ */
#include <linux/ipipe.h>

#include "msr_param.h"   //wird im Projektverzeichnis erwartet

//#include <msr_control.h>
#include <msr_lists.h>
#include <msr_charbuf.h>
#include <msr_reg.h>
#include <msr_error_reg.h>
#include <msr_messages.h>
#include <msr_proc.h>
#include <msr_utils.h>
#include <msr_main.h>


#include <msr_float.h>

#include "../drivers/ec_master.h"
#include "../drivers/ec_device.h"
#include "../drivers/ec_types.h"
#include "../drivers/ec_module.h"

#include "msr_jitter.h"

#define TSC2US(T) ((unsigned long) (T) * 1000UL / cpu_khz)

/*--external data------------------------------------------------------------*/

#define HZREDUCTION (MSR_ABTASTFREQUENZ/HZ)

extern wait_queue_head_t msr_read_waitqueue;

extern struct msr_char_buf *msr_kanal_puffer;

extern int proc_abtastfrequenz;

/*--local data---------------------------------------------------------------*/

extern struct timeval process_time;
struct timeval msr_time_increment; // Increment per Interrupt

//adeos

static struct ipipe_domain this_domain;

static struct ipipe_sysinfo sys_info;

static EtherCAT_master_t *ecat_master = NULL;

static EtherCAT_slave_t ecat_slaves[] =
{
#if 1
    // Block 1
    ECAT_INIT_SLAVE(Beckhoff_EK1100, 0),
    ECAT_INIT_SLAVE(Beckhoff_EL4102, 0),
    ECAT_INIT_SLAVE(Beckhoff_EL1014, 0),
    ECAT_INIT_SLAVE(Beckhoff_EL3162, 0),
    ECAT_INIT_SLAVE(Beckhoff_EL2004, 0),
    ECAT_INIT_SLAVE(Beckhoff_EL3102, 0),
    ECAT_INIT_SLAVE(Beckhoff_EL2004, 0),
    ECAT_INIT_SLAVE(Beckhoff_EL2004, 0),
    ECAT_INIT_SLAVE(Beckhoff_EL2004, 0),
    ECAT_INIT_SLAVE(Beckhoff_EL2004, 0),
    ECAT_INIT_SLAVE(Beckhoff_EL2004, 0),

    // Block 2
    ECAT_INIT_SLAVE(Beckhoff_EK1100, 1),
    ECAT_INIT_SLAVE(Beckhoff_EL1014, 1),
    ECAT_INIT_SLAVE(Beckhoff_EL1014, 1),
    ECAT_INIT_SLAVE(Beckhoff_EL1014, 1),
    ECAT_INIT_SLAVE(Beckhoff_EL1014, 1),
    ECAT_INIT_SLAVE(Beckhoff_EL1014, 1),
    ECAT_INIT_SLAVE(Beckhoff_EL2004, 1),
    ECAT_INIT_SLAVE(Beckhoff_EL2004, 1),
    ECAT_INIT_SLAVE(Beckhoff_EL2004, 1),
    ECAT_INIT_SLAVE(Beckhoff_EL2004, 1),
    ECAT_INIT_SLAVE(Beckhoff_EL1014, 1),
    ECAT_INIT_SLAVE(Beckhoff_EL1014, 1),
    ECAT_INIT_SLAVE(Beckhoff_EL1014, 1)
#endif

#if 0
    // Block 3
   ,ECAT_INIT_SLAVE(Beckhoff_EK1100, 2),
    ECAT_INIT_SLAVE(Beckhoff_EL3162, 2),
    ECAT_INIT_SLAVE(Beckhoff_EL3162, 2),
    ECAT_INIT_SLAVE(Beckhoff_EL3162, 2),
    ECAT_INIT_SLAVE(Beckhoff_EL3162, 2),
    ECAT_INIT_SLAVE(Beckhoff_EL3102, 2),
    ECAT_INIT_SLAVE(Beckhoff_EL3102, 2),
    ECAT_INIT_SLAVE(Beckhoff_EL3102, 2),
    ECAT_INIT_SLAVE(Beckhoff_EL4102, 2),
    ECAT_INIT_SLAVE(Beckhoff_EL4102, 2),
    ECAT_INIT_SLAVE(Beckhoff_EL4102, 2),
    ECAT_INIT_SLAVE(Beckhoff_EL4102, 2),
    ECAT_INIT_SLAVE(Beckhoff_EL4132, 2)
#endif
};

#define ECAT_SLAVES_COUNT (sizeof(ecat_slaves) / sizeof(EtherCAT_slave_t))

#define USE_MSR_LIB

#ifdef USE_MSR_LIB
double value;
int dig1;
#endif

/******************************************************************************
 *
 * Function: next2004
 *
 *****************************************************************************/

static int next2004(int *wrap)
{
    static int i = 0;
    unsigned int j = 0;

    *wrap = 0;

    for (j = 0; j < ECAT_SLAVES_COUNT; j++)
    {
        i++;

        i %= ECAT_SLAVES_COUNT;

        if (i == 0) *wrap = 1;

        if (ecat_slaves[i].desc == Beckhoff_EL2004)
        {
            return i;
        }
    }

    return -1;
}


/******************************************************************************
 *
 * Function: msr_controller_run()
 *
 *****************************************************************************/

static void msr_controller_run(void)
{
    static int ms = 0;
    static int cnt = 0;
    static unsigned long int k = 0;
    static int firstrun = 1;

    static int klemme = 0;
    static int kanal = 0;
    static int up_down = 0;
    int wrap = 0;

    static unsigned int debug_counter = 0;
    unsigned long t1, t2, t3, t4, t5, t6, t7;
    static unsigned long lt = 0;
    unsigned int tr1, tr2;

    rdtscl(t1);

    // Prozessdaten lesen
    msr_jitter_run(MSR_ABTASTFREQUENZ);

    if (firstrun) klemme = next2004(&wrap);

    ms++;
    ms %= 1000;
    if (cnt++ > 200)
    {
        cnt = 0;

        if (++kanal > 3)
        {
            kanal = 0;
            klemme = next2004(&wrap);

            if (wrap == 1)
            {
                if (up_down == 1) up_down = 0;
                else up_down = 1;
            }
        }
    }

    if (klemme >= 0) {
        EtherCAT_write_value(&ecat_slaves[klemme], kanal, up_down);
    }

#if 0
    EtherCAT_write_value(&ecat_master->slaves[13], 1, ms > 500 ? 0 : 1);
    EtherCAT_write_value(&ecat_master->slaves[14], 2, ms > 500 ? 0 : 1);
    EtherCAT_write_value(&ecat_master->slaves[15], 3, ms > 500 ? 1 : 0);
#endif

    // Prozessdaten schreiben
    rdtscl(k);
    rdtscl(t2);

    EtherCAT_process_data_cycle(ecat_master, 0);

    t3 = ecat_master->tx_time;
    t4 = ecat_master->rx_time;
    tr1 = ecat_master->rx_tries;

    EtherCAT_process_data_cycle(ecat_master, 1);

    t5 = ecat_master->tx_time;
    t6 = ecat_master->rx_time;
    tr2 = ecat_master->rx_tries;

    //EtherCAT_process_data_cycle(ecat_master, 2);

    // Daten lesen und skalieren
#ifdef USE_MSR_LIB
    value = EtherCAT_read_value(&ecat_slaves[5], 0) / 3276.0;
    dig1 = EtherCAT_read_value(&ecat_slaves[2], 0);
#endif

    rdtscl(t7);

    if (debug_counter == MSR_ABTASTFREQUENZ) {
      printk(KERN_DEBUG "%lu: %luŽµs + %luŽµs + %luŽµs + %luŽµs + %luŽµs +"
             " %luŽµs = %luŽµs (%u %u)\n",
             TSC2US(t1 - lt),
             TSC2US(t2 - t1), TSC2US(t3 - t2), TSC2US(t4 - t3),
             TSC2US(t5 - t4), TSC2US(t6 - t5), TSC2US(t7 - t6),
             TSC2US(t7 - t1), tr1, tr2);
      debug_counter = 0;
    }

    lt = t1;

    firstrun = 0;
    debug_counter++;
}

/******************************************************************************
 *
 *  Function: msr_run(_interrupt)
 *
 *  Beschreibung: Routine wird zyklisch im Timerinterrupt ausgeführt
 *                (hier muß alles rein, was Echtzeit ist ...)
 *
 *  Parameter: Zeiger auf msr_data
 *
 *  Rückgabe:
 *
 *  Status: exp
 *
 *****************************************************************************/

void msr_run(unsigned irq)
{
  static int counter = 0;
#ifdef USE_MSR_LIB

    timeval_add(&process_time,&process_time,&msr_time_increment);

    MSR_ADEOS_INTERRUPT_CODE(
	msr_controller_run();
	msr_write_kanal_list();
	);
#else
    msr_controller_run();
#endif
    /* und wieder in die Timerliste eintragen */
    /* und neu in die Taskqueue eintragen */
    //timer.expires += 1;
    //add_timer(&timer);

    ipipe_control_irq(irq,0,IPIPE_ENABLE_MASK);  //Interrupt bestŽätigen
    if(counter++ > HZREDUCTION) {
	ipipe_propagate_irq(irq);  //und weiterreichen
	counter = 0;
    }
}

void domain_entry (void)
{
    printk("Domain %s started.\n", ipipe_current_domain->name);

    ipipe_get_sysinfo(&sys_info);
    ipipe_virtualize_irq(ipipe_current_domain,sys_info.archdep.tmirq,
			 &msr_run, NULL, IPIPE_HANDLE_MASK);

    ipipe_tune_timer(1000000000UL/MSR_ABTASTFREQUENZ,0);
}

/******************************************************************************
 *
 *  Function: msr_register_channels
 *
 *  Beschreibung: KanŽäle registrieren
 *
 *  Parameter:
 *
 *  RŽückgabe:
 *
 *  Status: exp
 *
 *****************************************************************************/

int msr_globals_register(void)
{
#ifdef USE_MSR_LIB
    msr_reg_kanal("/value", "V", &value, TDBL);
    msr_reg_kanal("/dig1", "", &dig1, TINT);
#endif
#if 0
    msr_reg_kanal("/Taskinfo/Ecat/TX-Delay","us",&ecat_tx_delay,TUINT);
    msr_reg_kanal("/Taskinfo/Ecat/RX-Delay","us",&ecat_rx_delay,TUINT);
    msr_reg_kanal("/Taskinfo/Ecat/TX-Cnt","",&tx_intr,TUINT);
    msr_reg_kanal("/Taskinfo/Ecat/RX-Cnt","",&rx_intr,TUINT);
    msr_reg_kanal("/Taskinfo/Ecat/Total-Cnt","",&total_intr,TUINT);
#endif
  return 0;
}

/******************************************************************************
 * the init/clean material
 *****************************************************************************/

int __init init_module()
{
    unsigned int i;
    struct ipipe_domain_attr attr; //ipipe

    // Als allererstes die RT-lib initialisieren
#ifdef USE_MSR_LIB
    if (msr_rtlib_init(1,MSR_ABTASTFREQUENZ,10,&msr_globals_register) < 0) {
        msr_print_warn("msr_modul: can't initialize rtlib!");
        goto out_return;
    }
#endif

    msr_jitter_init();

    printk(KERN_INFO "=== Starting EtherCAT environment... ===\n");

    if ((ecat_master = EtherCAT_request(0)) == NULL) {
        printk(KERN_ERR "EtherCAT master 0 not available!\n");
        goto out_msr_cleanup;
    }

    printk("Checking EtherCAT slaves.\n");

    if (EtherCAT_check_slaves(ecat_master, ecat_slaves, ECAT_SLAVES_COUNT) != 0) {
        printk(KERN_ERR "EtherCAT: Could not init slaves!\n");
        goto out_release_master;
    }

    printk("Activating all EtherCAT slaves.\n");

    for (i = 0; i < ECAT_SLAVES_COUNT; i++) {
        if (EtherCAT_activate_slave(ecat_master, ecat_slaves + i) < 0) {
            goto out_release_master;
        }
    }

    do_gettimeofday(&process_time);
    msr_time_increment.tv_sec=0;
    msr_time_increment.tv_usec=(unsigned int)(1000000/MSR_ABTASTFREQUENZ);

    ipipe_init_attr (&attr);
    attr.name     = "IPIPE-MSR-MODULE";
    attr.priority = IPIPE_ROOT_PRIO + 1;
    attr.entry    = &domain_entry;
    ipipe_register_domain(&this_domain,&attr);

    return 0;

 out_release_master:
    EtherCAT_release(ecat_master);

 out_msr_cleanup:
    msr_rtlib_cleanup();

 out_return:
    return -1;
}

/*****************************************************************************/

void __exit cleanup_module()
{
    unsigned int i;

    msr_print_info("msk_modul: unloading...");

    ipipe_tune_timer(1000000000UL/HZ,0); //alten Timertakt wieder herstellen
    ipipe_unregister_domain(&this_domain);

    printk(KERN_INFO "=== Stopping EtherCAT environment... ===\n");

    if (ecat_master)
    {
        printk(KERN_INFO "Deactivating slaves.\n");

        for (i = 0; i < ECAT_SLAVES_COUNT; i++) {
            if (EtherCAT_deactivate_slave(ecat_master, ecat_slaves + i) < 0) {
                printk(KERN_WARNING "Warning - Could not deactivate slave!\n");
            }
        }

        EtherCAT_release(ecat_master);
    }

    printk(KERN_INFO "=== EtherCAT environment stopped. ===\n");

#ifdef USE_MSR_LIB
    msr_rtlib_cleanup();
#endif
}

/*****************************************************************************/

MODULE_LICENSE("GPL");
MODULE_AUTHOR ("Wilhelm Hagemeister <hm@igh-essen.com>");
MODULE_DESCRIPTION ("EtherCAT test environment");

module_init(init_module);
module_exit(cleanup_module);

/*****************************************************************************/