/*      $NetBSD: if_cs_smdk24x0.c,v 1.8 2019/04/25 05:42:43 msaitoh Exp $ */

/*
* Copyright (c) 2003  Genetec corporation.  All rights reserved.
* Written by Hiroyuki Bessho for Genetec corporation.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
*    notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
*    notice, this list of conditions and the following disclaimer in the
*    documentation and/or other materials provided with the distribution.
* 3. The name of Genetec corporation may not be used to endorse
*    or promote products derived from this software without specific prior
*    written permission.
*
* THIS SOFTWARE IS PROVIDED BY GENETEC CORP. ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL GENETEC CORP.
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/

/* derived from sys/dev/isa/if_cs_isa.c */
/*
* Copyright 1997
* Digital Equipment Corporation. All rights reserved.
*
* This software is furnished under license and may be used and
* copied only in accordance with the following terms and conditions.
* Subject to these conditions, you may download, copy, install,
* use, modify and distribute this software in source and/or binary
* form. No title or ownership is transferred hereby.
*
* 1) Any source code used, modified or distributed must reproduce
*    and retain this copyright notice and list of conditions as
*    they appear in the source file.
*
* 2) No right is granted to use any trade name, trademark, or logo of
*    Digital Equipment Corporation. Neither the "Digital Equipment
*    Corporation" name nor any trademark or logo of Digital Equipment
*    Corporation may be used to endorse or promote products derived
*    from this software without the prior written permission of
*    Digital Equipment Corporation.
*
* 3) This software is provided "AS-IS" and any express or implied
*    warranties, including but not limited to, any implied warranties
*    of merchantability, fitness for a particular purpose, or
*    non-infringement are disclaimed. In no event shall DIGITAL be
*    liable for any damages whatsoever, and in particular, DIGITAL
*    shall not be liable for special, indirect, consequential, or
*    incidental damages or damages for lost profits, loss of
*    revenue or loss of use, whether such damages arise in contract,
*    negligence, tort, under statute, in equity, at law or otherwise,
*    even if advised of the possibility of such damage.
*/

/*
* driver for SMDK24[10]0's on-board CS8900A Ethernet
*
* CS8900A is located at CS3 area.
*    A24=1: I/O access
*    A24=0: Memory access
*/

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: if_cs_smdk24x0.c,v 1.8 2019/04/25 05:42:43 msaitoh Exp $");

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/socket.h>
#include <sys/device.h>

#include <net/if.h>
#include <net/if_ether.h>
#include <net/if_media.h>

#include <sys/bus.h>
#include <machine/intr.h>

#include <arch/arm/s3c2xx0/s3c2410reg.h>
#include <arch/arm/s3c2xx0/s3c2410var.h>

#include <dev/ic/cs89x0reg.h>
#include <dev/ic/cs89x0var.h>

#include "locators.h"
#include "opt_smdk2xx0.h"               /* SMDK24X0_ETHER_ADDR_FIXED */

int     cs_ssextio_probe(device_t, cfdata_t, void *);
void    cs_ssextio_attach(device_t, device_t, void *);

/*
* I/O access is done when A24==1.
* default value for I/O base address is 0x300
*/
#define IOADDR(base)    (base + (1<<24) + 0x0300)

CFATTACH_DECL_NEW(cs_ssextio, sizeof(struct cs_softc),
   cs_ssextio_probe, cs_ssextio_attach, NULL, NULL);

int
cs_ssextio_probe(device_t parent, cfdata_t cf, void *aux)
{
       struct s3c2xx0_attach_args *sa = aux;
       bus_space_tag_t iot = sa->sa_iot;
       bus_space_handle_t ioh;
       struct cs_softc sc;
       int rv = 0, have_io = 0;
       vaddr_t ioaddr;

       if (sa->sa_intr == SSEXTIOCF_INTR_DEFAULT)
               sa->sa_intr = 9;
       if (sa->sa_addr == SSEXTIOCF_ADDR_DEFAULT)
               sa->sa_addr = S3C2410_BANK_START(3);

       /* Map the I/O space. */
       ioaddr = IOADDR(sa->sa_addr);
       if (bus_space_map(iot, ioaddr, CS8900_IOSIZE, 0, &ioh))
               goto out;
       have_io = 1;

       memset(&sc, 0, sizeof sc);
       sc.sc_iot = iot;
       sc.sc_ioh = ioh;

       if (0) {
               int i;

               for (i = 0; i <= PKTPG_IND_ADDR; i += 2) {
                       if (i % 16 == 0)
                               printf( "\n%04x: ", i);
                       printf("%04x ", CS_READ_PACKET_PAGE_IO(&sc, i));
               }

       }

       /* Verify that it's a Crystal product. */
       if (CS_READ_PACKET_PAGE_IO(&sc, PKTPG_EISA_NUM) != EISA_NUM_CRYSTAL)
               goto out;

       /* Verify that it's a supported chip. */
       switch (CS_READ_PACKET_PAGE_IO(&sc, PKTPG_PRODUCT_ID) & PROD_ID_MASK) {
       case PROD_ID_CS8900:
#ifdef notyet
       case PROD_ID_CS8920:
       case PROD_ID_CS8920M:
#endif
               rv = 1;
       }

out:
       if (have_io)
               bus_space_unmap(iot, ioh, CS8900_IOSIZE);

       return rv;
}

/* media selection: UTP only */
static int cs_media[] = {
       IFM_ETHER | IFM_10_T,
#if 0
       IFM_ETHER | IFM_10_T | IFM_FDX,
#endif
};

void
cs_ssextio_attach(device_t parent, device_t self, void *aux)
{
       struct cs_softc *sc = device_private(self);
       struct s3c2xx0_attach_args *sa = aux;
       vaddr_t ioaddr;
#ifdef  SMDK24X0_ETHER_ADDR_FIXED
       static uint8_t enaddr[ETHER_ADDR_LEN] = {SMDK24X0_ETHER_ADDR_FIXED};
#else
#define enaddr NULL
#endif

       sc->sc_dev = self;
       sc->sc_iot = sc->sc_memt = sa->sa_iot;
       /*
        * sc_irq is an IRQ number in ISA world. Set 10 for INTRQ0 of CS8900A.
        */
       sc->sc_irq = 10;

       /* Map the device. */
       ioaddr = IOADDR(sa->sa_addr);
       if (bus_space_map(sc->sc_iot, ioaddr, CS8900_IOSIZE, 0, &sc->sc_ioh)) {
               aprint_error(": unable to map i/o space\n");
               return;
       }

       if (bus_space_map(sc->sc_iot, sa->sa_addr, CS8900_MEMSIZE,
                         0, &sc->sc_memh))
               aprint_error(": unable to map memory space");
       else {
               sc->sc_cfgflags |= CFGFLG_MEM_MODE;
               sc->sc_pktpgaddr = sa->sa_addr;
       }

       /*
        * CS8900A is very slow. (nOE->Data valid: 135ns max.)
        * We need to use IOCHRDY signal.
        */
       sc->sc_cfgflags |= CFGFLG_IOCHRDY;

       sc->sc_ih = s3c2410_extint_establish(sa->sa_intr, IPL_NET,
           IST_EDGE_RISING, cs_intr, sc);
       if (sc->sc_ih == NULL) {
               aprint_error(": unable to establish interrupt\n");
               return;
       }

       aprint_normal("\n");

       /* SMDK24X0 doesn't have EEPRMO hooked to CS8900A */
       sc->sc_cfgflags |= CFGFLG_NOT_EEPROM;

       cs_attach(sc, enaddr, cs_media, __arraycount(cs_media),
           IFM_ETHER | IFM_10_T);
}

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