/*      $NetBSD: obs600_machdep.c,v 1.17 2022/01/15 10:55:06 msaitoh Exp $      */
/*      Original: md_machdep.c,v 1.3 2005/01/24 18:47:37 shige Exp $    */

/*
* Copyright 2001, 2002 Wasabi Systems, Inc.
* All rights reserved.
*
* Written by Eduardo Horvath and Simon Burge for Wasabi Systems, Inc.
*
* 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. All advertising materials mentioning features or use of this software
*    must display the following acknowledgement:
*      This product includes software developed for the NetBSD Project by
*      Wasabi Systems, Inc.
* 4. The name of Wasabi Systems, Inc. may not be used to endorse
*    or promote products derived from this software without specific prior
*    written permission.
*
* THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``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 WASABI SYSTEMS, INC
* 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.
*/

/*
* Copyright (C) 1995, 1996 Wolfgang Solfrank.
* Copyright (C) 1995, 1996 TooLs GmbH.
* All rights reserved.
*
* 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. All advertising materials mentioning features or use of this software
*    must display the following acknowledgement:
*      This product includes software developed by TooLs GmbH.
* 4. The name of TooLs GmbH may not be used to endorse or promote products
*    derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``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 TOOLS GMBH 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.
*/

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: obs600_machdep.c,v 1.17 2022/01/15 10:55:06 msaitoh Exp $");

#include "opt_ddb.h"

#include <sys/param.h>
#include <sys/bus.h>
#include <sys/device.h>
#include <sys/errno.h>
#include <sys/kernel.h>
#include <sys/module.h>
#include <sys/reboot.h>
#include <sys/systm.h>

#include <machine/obs600.h>

#include <powerpc/spr.h>
#include <powerpc/ibm4xx/spr.h>

#include <powerpc/ibm4xx/amcc405ex.h>
#include <powerpc/ibm4xx/cpu.h>
#include <powerpc/ibm4xx/dcr4xx.h>
#include <powerpc/ibm4xx/tlb.h>

#include <powerpc/ibm4xx/dev/gpiicreg.h>
#include <powerpc/ibm4xx/dev/opbvar.h>

#include "com.h"
#if (NCOM > 0)
#include <sys/termios.h>
#include <powerpc/ibm4xx/dev/comopbvar.h>
#include <dev/ic/comreg.h>

#ifndef CONADDR
#define CONADDR         AMCC405EX_UART0_BASE
#endif
#ifndef CONSPEED
#define CONSPEED        B115200
#endif
#ifndef CONMODE
                       /* 8N1 */
#define CONMODE         ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8)
#endif
#endif  /* NCOM */

/*
* XXXX:
* It is very troublesome though we can calculate from various registers. X-<
*/
#define OBS600_CPU_FREQ (600 * 1000 * 1000)
#define OBS600_MEM_SIZE (1 * 1024 * 1024 * 1024)

#define TLB_PG_SIZE     (16 * 1024 * 1024)

void initppc(vaddr_t, vaddr_t, int, char *[], char *);
static int read_eeprom(int, char *);


void
initppc(vaddr_t startkernel, vaddr_t endkernel, int argc, char *argv[],
       char *argstr)
{
       vaddr_t va;
       u_int memsize;

       memsize = OBS600_MEM_SIZE;

       /* Linear map kernel memory */
       for (va = 0; va < endkernel; va += TLB_PG_SIZE)
               ppc4xx_tlb_reserve(va, va, TLB_PG_SIZE, TLB_EX);

       /*
        * Map console and I2C after RAM. (see pmap_tlbmiss())
        * All peripherals mapped on a page.
        */
       ppc4xx_tlb_reserve(AMCC405EX_OPB_BASE, roundup(memsize, TLB_PG_SIZE),
           TLB_PG_SIZE, TLB_I | TLB_G);

       /* Initialize AMCC 405EX CPU */
       ibm40x_memsize_init(memsize, startkernel);
       ibm4xx_init(startkernel, endkernel, pic_ext_intr);

#ifdef DDB
       if (boothowto & RB_KDB)
               Debugger();
#endif
}

void
consinit(void)
{

#if (NCOM > 0)
       com_opb_cnattach(OBS600_COM_FREQ, CONADDR, CONSPEED, CONMODE);
#endif /* NCOM */
}

/*
* Machine dependent startup code.
*/
void
cpu_startup(void)
{
       prop_number_t pn;
       prop_data_t pd;
       u_char *macaddr, *macaddr1;
       static u_char buf[16];  /* MAC address x2 buffer */

       /*
        * cpu common startup
        */
       ibm4xx_cpu_startup("OpenBlockS600 AMCC PowerPC 405EX Board");

       /*
        * Set up the board properties database.
        */
       board_info_init();

       pn = prop_number_create_integer(OBS600_CPU_FREQ);
       KASSERT(pn != NULL);
       if (prop_dictionary_set(board_properties, "processor-frequency", pn) ==
           false)
               panic("setting processor-frequency");
       prop_object_release(pn);

       pn = prop_number_create_integer(OBS600_MEM_SIZE);
       KASSERT(pn != NULL);
       if (prop_dictionary_set(board_properties, "mem-size", pn) == false)
               panic("setting mem-size");
       prop_object_release(pn);

       calc_delayconst(); /* required by read_eeprom() */

#define ETHER_ADDR_LEN  6

       read_eeprom(sizeof(buf), buf);
       macaddr = &buf[0];
       macaddr1 = &buf[8];

       pd = prop_data_create_data_nocopy(macaddr, ETHER_ADDR_LEN);
       KASSERT(pd != NULL);
       if (prop_dictionary_set(board_properties, "emac0-mac-addr", pd) ==
           false)
               panic("setting emac0-mac-addr");
       prop_object_release(pd);
       pd = prop_data_create_data_nocopy(macaddr1, ETHER_ADDR_LEN);
       KASSERT(pd != NULL);
       if (prop_dictionary_set(board_properties, "emac1-mac-addr", pd) ==
           false)
               panic("setting emac1-mac-addr");
       prop_object_release(pd);

       /* emac0 connects to phy 2 and emac1 to phy 3 via RGMII. */
       pn = prop_number_create_integer(2);
       KASSERT(pn != NULL);
       if (prop_dictionary_set(board_properties, "emac0-mii-phy", pn) == false)
               panic("setting emac0-mii-phy");
       prop_object_release(pn);
       pn = prop_number_create_integer(3);
       KASSERT(pn != NULL);
       if (prop_dictionary_set(board_properties, "emac1-mii-phy", pn) == false)
               panic("setting emac1-mii-phy");
       prop_object_release(pn);

       /*
        * Now that we have VM, malloc()s are OK in bus_space.
        */
       bus_space_mallocok();

       /*
        * no fake mapiodev
        */
       fake_mapiodev = 0;

       splraise(-1);
}

/*
* Read EEPROM via I2C.  We don't use bus_space(9) here.  This is MD-part and,
* don't support bus_space_unmap() to a space on reserved space? X-<
*
* XXXX: Also this function assume already initialized for I2C...
*/
static int
read_eeprom(int len, char *buf)
{
       volatile uint8_t *iic0;
#define IIC0_READ(r)            (*(iic0 + (r)))
#define IIC0_WRITE(r, v)        (*(iic0 + (r)) = (v))
       uint8_t sts;
       int cnt, i = 0;

#define I2C_EEPROM_ADDR 0x52

       if ((iic0 = ppc4xx_tlb_mapiodev(AMCC405EX_IIC0_BASE, IIC_NREG)) == NULL)
               return ENOMEM; /* ??? */

       /* Clear Stop Complete Bit */
       IIC0_WRITE(IIC_STS, IIC_STS_SCMP);
       /* Check init */
       do {
               /* Get status */
               sts = IIC0_READ(IIC_STS);
       } while ((sts & IIC_STS_PT));

       IIC0_WRITE(IIC_MDCNTL,
           IIC0_READ(IIC_MDCNTL) | IIC_MDCNTL_FMDB | IIC_MDCNTL_FSDB);

       /* 7-bit addressing */
       IIC0_WRITE(IIC_HMADR, 0);
       IIC0_WRITE(IIC_LMADR, I2C_EEPROM_ADDR << 1);

       IIC0_WRITE(IIC_MDBUF, 0);
       IIC0_WRITE(IIC_CNTL, IIC_CNTL_PT);
       do {
               /* Get status */
               sts = IIC0_READ(IIC_STS);
       } while ((sts & IIC_STS_PT) && !(sts & IIC_STS_ERR));

       cnt = 0;
       while (cnt < len) {
               /* always read 4byte */
               IIC0_WRITE(IIC_CNTL,
                   IIC_CNTL_PT                         |
                   IIC_CNTL_RW                         |
                   ((cnt == 0) ? IIC_CNTL_RPST : 0)    |
                   IIC_CNTL_TCT);
               do {
                       /* Get status */
                       sts = IIC0_READ(IIC_STS);
               } while ((sts & IIC_STS_PT) && !(sts & IIC_STS_ERR));

               if ((sts & IIC_STS_PT) || (sts & IIC_STS_ERR))
                       break;
               if (sts & IIC_STS_MDBS) {
                       delay(1);
                       /* read 4byte */
                       for (i = 0; i < 4 && cnt < len; i++, cnt++)
                               buf[cnt] = IIC0_READ(IIC_MDBUF);
               }
       }
       for ( ; i < 4; i++)
               (void) IIC0_READ(IIC_MDBUF);

       return (cnt == len) ? 0 : EINVAL;
}

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