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//==========================================================================

//

//      dev/if_sc_lpe.c

//

//      Ethernet device driver for Socket Communications Compact Flash card

//

//==========================================================================

//####ECOSGPLCOPYRIGHTBEGIN####

// -------------------------------------------

// This file is part of eCos, the Embedded Configurable Operating System.

// Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc.

// Copyright (C) 2002 Gary Thomas

//

// eCos is free software; you can redistribute it and/or modify it under

// the terms of the GNU General Public License as published by the Free

// Software Foundation; either version 2 or (at your option) any later version.

//

// eCos is distributed in the hope that it will be useful, but WITHOUT ANY

// WARRANTY; without even the implied warranty of MERCHANTABILITY or

// FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

// for more details.

//

// You should have received a copy of the GNU General Public License along

// with eCos; if not, write to the Free Software Foundation, Inc.,

// 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.

//

// As a special exception, if other files instantiate templates or use macros

// or inline functions from this file, or you compile this file and link it

// with other works to produce a work based on this file, this file does not

// by itself cause the resulting work to be covered by the GNU General Public

// License. However the source code for this file must still be made available

// in accordance with section (3) of the GNU General Public License.

//

// This exception does not invalidate any other reasons why a work based on

// this file might be covered by the GNU General Public License.

//

// Alternative licenses for eCos may be arranged by contacting Red Hat, Inc.

// at http://sources.redhat.com/ecos/ecos-license/

// -------------------------------------------

//####ECOSGPLCOPYRIGHTEND####

//####BSDCOPYRIGHTBEGIN####

//

// -------------------------------------------

//

// Portions of this software may have been derived from OpenBSD or other sources,

// and are covered by the appropriate copyright disclaimers included herein.

//

// -------------------------------------------

//

//####BSDCOPYRIGHTEND####

//==========================================================================

//#####DESCRIPTIONBEGIN####

//

// Author(s):    gthomas

// Contributors: gthomas, jskov

// Date:         2000-07-07

// Purpose:      

// Description:  hardware driver for LPCF+ ethernet

//              

//

//####DESCRIPTIONEND####

//

//==========================================================================

#include <pkgconf/system.h>

#include <pkgconf/io_eth_drivers.h>

#include <cyg/infra/cyg_type.h>

#include <cyg/hal/hal_arch.h>

#include <cyg/infra/diag.h>

#include <cyg/hal/drv_api.h>

#include <cyg/io/pcmcia.h>

#include <cyg/io/eth/eth_drv.h>

#include <cyg/io/eth/netdev.h>

#ifdef CYGPKG_NET

#include <pkgconf/net.h>

#else

#include <cyg/hal/hal_if.h>

#endif

#include <cyg/io/dp83902a.h>

#define DP_DATA         0x10

#define DP_CARD_RESET   0x1f

#define SC_LPE_MANUF 0x0104

#ifdef CYGPKG_KERNEL

#define STACK_SIZE CYGNUM_HAL_STACK_SIZE_TYPICAL

static char sc_lpe_card_handler_stack[STACK_SIZE];

static cyg_thread sc_lpe_card_handler_thread_data;

static cyg_handle_t sc_lpe_card_handler_thread_handle;

#endif  // CYGPKG_KERNEL

__inline__ static void

do_delay(int _ticks)

{

#ifdef CYGPKG_KERNEL

    cyg_thread_delay(_ticks);

#else

    CYGACC_CALL_IF_DELAY_US(10000*_ticks);

#endif

}

//

// This runs as a separate thread to handle the card.  In particular, insertions

// and deletions need to be handled and they take time/coordination, thus the

// separate thread.

//

#ifdef CYGPKG_KERNEL

static void

#else

static int

#endif

sc_lpe_card_handler(cyg_addrword_t param)

{

    struct eth_drv_sc *sc = (struct eth_drv_sc *)param;

    dp83902a_priv_data_t *dp = (dp83902a_priv_data_t*)sc->driver_private;

    struct cf_slot *slot;

    struct cf_cftable cftable;

    struct cf_config config;

    int i, len, ptr, cor = 0;

    unsigned char buf[256], *cp;

    cyg_uint8* base;

    unsigned char *vers_product, *vers_manuf, *vers_revision, *vers_date;

#ifndef CYGPKG_KERNEL

    int tries = 0;

#endif

    bool first = true;

    slot = (struct cf_slot*)dp->plf_priv;

    cyg_drv_dsr_lock();

    while (true) {

        cyg_drv_dsr_unlock();   // Give DSRs a chance to run (card insertion)

        cyg_drv_dsr_lock();

        if ((slot->state == CF_SLOT_STATE_Inserted) ||

            ((slot->state == CF_SLOT_STATE_Ready) && first)) {

            first = false;

            if (slot->state != CF_SLOT_STATE_Ready) {

                cf_change_state(slot, CF_SLOT_STATE_Ready);

            }

            if (slot->state != CF_SLOT_STATE_Ready) {

                diag_printf("CF card won't go ready!\n");

#ifndef CYGPKG_KERNEL

                return false;

#else

                continue;

#endif

            }

            len = sizeof(buf);

            ptr = 0;

            if (cf_get_CIS(slot, CF_CISTPL_MANFID, buf, &len, &ptr)) {

                if (*(short *)&buf[2] != SC_LPE_MANUF) {

                    diag_printf("Not a SC LPE, sorry\n");

                    continue;

                }

            }

            ptr = 0;

            if (cf_get_CIS(slot, CF_CISTPL_VERS_1, buf, &len, &ptr)) {

                // Find individual strings

                cp = &buf[4];

                vers_product = cp;

                while (*cp++) ;  // Skip to nul

                vers_manuf = cp;

                while (*cp++) ;  // Skip to nul

                vers_revision = cp;

                while (*cp++) ;  // Skip to nul

                vers_date = cp;

#ifndef CYGPKG_KERNEL

                if (tries != 0) diag_printf("\n");

                diag_printf("%s: %s %s %s\n", vers_manuf, vers_product, vers_revision, vers_date);

#endif

            }

            ptr = 0;

            if (cf_get_CIS(slot, CF_CISTPL_CONFIG, buf, &len, &ptr)) {

                if (cf_parse_config(buf, len, &config)) {

                    cor = config.base;

                }

            }

            if (!cor) {

//                diag_printf("Couldn't find COR pointer!\n");

                continue;

            }

            ptr = 0;

            if (cf_get_CIS(slot, CF_CISTPL_CFTABLE_ENTRY, buf, &len, &ptr)) {

                if (cf_parse_cftable(buf, len, &cftable)) {

                    cyg_uint8 tmp;

                    // Initialize dp83902a IO details

                    dp->base = base = (cyg_uint8*)&slot->io[cftable.io_space.base[0]];

                    dp->data = base + DP_DATA;

                    dp->interrupt = slot->int_num;

                    cf_set_COR(slot, cor, cftable.cor);

                    // Reset card  (read issues RESET, write clears it)

                    HAL_READ_UINT8(base+DP_CARD_RESET, tmp);

                    HAL_WRITE_UINT8(base+DP_CARD_RESET, tmp);

                    // Wait for card

                    do {

                        DP_IN(base, DP_ISR, tmp);

                    } while (0 == (tmp & DP_ISR_RESET));

                    // Fetch hardware address from card - terrible, but not well defined

                    // Patterned after what Linux drivers do

                    if (!dp->hardwired_esa) {

                        static unsigned char sc_lpe_addr[] = { 0x00, 0xC0, 0x1B, 0x00, 0x99, 0x9E};

                        if ((slot->attr[0x1C0] == sc_lpe_addr[0]) &&

                            (slot->attr[0x1C2] == sc_lpe_addr[1]) &&

                            (slot->attr[0x1C4] == sc_lpe_addr[2])) {

                            sc_lpe_addr[3] = slot->attr[0x1C6];

                            sc_lpe_addr[4] = slot->attr[0x1C8];

                            sc_lpe_addr[5] = slot->attr[0x1CA];

                        } else {

                            // Coudn't find it in the CIS (attribute) data

                            unsigned char prom[32];

                            // Tell device to give up ESA

                            DP_OUT(base, DP_DCR, 0x48);  // Bytewide access

                            DP_OUT(base, DP_RBCH, 0);    // Remote byte count

                            DP_OUT(base, DP_RBCL, 0);

                            DP_OUT(base, DP_ISR, 0xFF);  // Clear any pending interrupts

                            DP_OUT(base, DP_IMR, 0x00);  // Mask all interrupts 

                            DP_OUT(base, DP_RCR, 0x20);  // Monitor

                            DP_OUT(base, DP_TCR, 0x02);  // loopback

                            DP_OUT(base, DP_RBCH, 32);   // Remote byte count

                            DP_OUT(base, DP_RBCL, 0);

                            DP_OUT(base, DP_RSAL, 0);    // Remote address

                            DP_OUT(base, DP_RSAH, 0);

                            DP_OUT(base, DP_CR, DP_CR_START|DP_CR_RDMA);  // Read data

                            for (i = 0;  i < 32;  i++) {

                                HAL_READ_UINT8(base+DP_DATAPORT, prom[i]);

                            }

                            if ((prom[0] == sc_lpe_addr[0]) &&

                                (prom[2] == sc_lpe_addr[1]) &&

                                (prom[4] == sc_lpe_addr[2])) {

                                diag_printf("Getting address from port\n");

                                sc_lpe_addr[3] = prom[6];

                                sc_lpe_addr[4] = prom[8];

                                sc_lpe_addr[5] = prom[10];

                            } else {

                                diag_printf("No valid ESA found in CIS! Hardwiring to 00:C0:1B:00:99:9E\n");

                            }

                        }

                        for (i = 0;  i < 6;  i++) {

                            dp->esa[i] = sc_lpe_addr[i];

                        }

                    }

                    // Initialize upper level driver

                    (sc->funs->eth_drv->init)(sc, dp->esa);

                    // Tell system card is ready to talk

                    dp->tab->status = CYG_NETDEVTAB_STATUS_AVAIL;

#ifndef CYGPKG_KERNEL

                    cyg_drv_dsr_unlock();

                    return true;

#endif

                } else {

                    diag_printf("Can't parse CIS\n");

                    continue;

                }

            } else {

                diag_printf("Can't fetch config info\n");

                continue;

            }

        } else if (slot->state == CF_SLOT_STATE_Removed) {

            diag_printf("Compact Flash card removed!\n");

        } else {

            cyg_drv_dsr_unlock();

            do_delay(50);  // FIXME!

#ifndef CYGPKG_KERNEL

            if (tries == 0) diag_printf("... Waiting for network card: ");

            diag_printf(".");

            if (++tries == 10) {

                // 5 seconds have elapsed - give up

                return false;

            }

            cf_hwr_poll(slot);  // Check to see if card has been inserted

#endif

            cyg_drv_dsr_lock();

        }

    }

}

bool

cyg_sc_lpe_init(struct cyg_netdevtab_entry *tab)

{

    struct eth_drv_sc *sc = (struct eth_drv_sc *)tab->device_instance;

    dp83902a_priv_data_t *dp = (dp83902a_priv_data_t *)sc->driver_private;

    struct cf_slot* slot;

    cf_init();  // Make sure Compact Flash subsystem is initialized

    slot = dp->plf_priv = (void*)cf_get_slot(0);

    dp->tab = tab;

#ifdef CYGPKG_KERNEL

    // Create card handling [background] thread

    cyg_thread_create(CYGPKG_NET_THREAD_PRIORITY-1,          // Priority

                      sc_lpe_card_handler,                   // entry

                      (cyg_addrword_t)sc,                    // entry parameter

                      "SC LP-E card support",                // Name

                      &sc_lpe_card_handler_stack[0],         // Stack

                      STACK_SIZE,                            // Size

                      &sc_lpe_card_handler_thread_handle,    // Handle

                      &sc_lpe_card_handler_thread_data       // Thread data structure

            );

    cyg_thread_resume(sc_lpe_card_handler_thread_handle);    // Start it

    // Initialize environment, setup interrupt handler

    // eth_drv_dsr is used to tell the fast net thread to run the deliver funcion.

    cf_register_handler(slot, eth_drv_dsr, sc);

    return false;  // Device is not ready until inserted, powered up, etc.

#else

    // Initialize card

    return sc_lpe_card_handler((cyg_addrword_t)sc);

#endif

}

int

cyg_sc_lpe_int_vector(struct eth_drv_sc *sc)

{

    dp83902a_priv_data_t *dp = (dp83902a_priv_data_t *)sc->driver_private;

    struct cf_slot* slot = (struct cf_slot*)dp->plf_priv;

    return slot->int_num;

}