/*      $NetBSD: pbus.c,v 1.15 2021/08/07 16:18:52 thorpej Exp $        */

/*
* Copyright 2001 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) 1996 Christopher G. Demetriou.  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 Christopher G. Demetriou
*      for the NetBSD Project.
* 4. The name of the author may not be used to endorse or promote products
*    derived from this software without specific prior written permission
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 THE AUTHOR 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: pbus.c,v 1.15 2021/08/07 16:18:52 thorpej Exp $");

#include "locators.h"
#include "pckbc.h"

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

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

#include <evbppc/walnut/dev/pbusvar.h>

#include <powerpc/ibm4xx/ibm405gp.h>
#include <powerpc/ibm4xx/dev/plbvar.h>

/*
* The external devices on the Walnut 405GP evaluation board.
*/
const struct pbus_dev {
       const char *name;
       bus_addr_t addr;
       int irq;
} pbus_devs [] = {
       { "ds1743rtc",  NVRAM_BASE,     -1 },
       { "pckbc",      KEY_MOUSE_BASE, 25 }, /* XXX: really irq x..x+1 */
       { NULL }
};

static int      pbus_match(device_t, cfdata_t, void *);
static void     pbus_attach(device_t, device_t, void *);
static int      pbus_print(void *, const char *);

CFATTACH_DECL_NEW(pbus, 0,
   pbus_match, pbus_attach, NULL, NULL);

static struct powerpc_bus_space pbus_tag = {
       _BUS_SPACE_LITTLE_ENDIAN | _BUS_SPACE_MEM_TYPE,
       0x00000000,
       NVRAM_BASE,
       NVRAM_BASE + 0x0300010  /* Cover from NVRAM_BASE -> FPGA_BASE */
};

/*
* Probe for the peripheral bus.
*/
static int
pbus_match(device_t parent, cfdata_t cf, void *aux)
{
       struct pbus_attach_args *pba = aux;

       /* match only pbus devices */
       if (strcmp(pba->pb_name, cf->cf_name) != 0)
               return (0);

       return (1);
}

/*
* Attach the peripheral bus.
*/
static void
pbus_attach(device_t parent, device_t self, void *aux)
{
       struct plb_attach_args *paa = aux;
       struct pbus_attach_args pba;
       int i;
#if NPCKBC > 0
       bus_space_handle_t ioh_fpga;
       bus_space_tag_t iot_fpga = &pbus_tag;
       uint8_t fpga_reg;
#endif

       printf("\n");

       if (bus_space_init(&pbus_tag, "pbus", NULL, 0))
               panic("pbus_attach: can't init tag");

       for (i = 0; pbus_devs[i].name != NULL; i++) {
               pba.pb_name = pbus_devs[i].name;
               pba.pb_addr = pbus_devs[i].addr;
               pba.pb_irq = pbus_devs[i].irq;
               pba.pb_bt = &pbus_tag;
               pba.pb_dmat = paa->plb_dmat;

               const int locs[PBUSCF_NLOCS] = {
                   [PBUSCF_ADDR] = pba.pb_addr,
                   [PBUSCF_IRQ] = pba.pb_irq
               };

               config_found(self, &pba, pbus_print,
                   CFARGS(.submatch = config_stdsubmatch,
                          .locators = locs));
       }

#if NPCKBC > 0
       /* Configure FPGA */
       if (bus_space_map(iot_fpga, FPGA_BASE, FPGA_SIZE, 0, &ioh_fpga)) {
               printf("pbus_attach: can't map FPGA\n");
               /* XXX - disable keyboard probe? */
       } else {
               /* Use separate interrupts for keyboard and mouse */
               fpga_reg = bus_space_read_1(iot_fpga, ioh_fpga, FPGA_BRDC);
               fpga_reg |= FPGA_BRDC_INT;
               bus_space_write_1(iot_fpga, ioh_fpga, FPGA_BRDC, fpga_reg);

               /* Set interrupts to active high */
               fpga_reg = bus_space_read_1(iot_fpga, ioh_fpga, FPGA_INT_POL);
               fpga_reg |= (FPGA_IRQ_KYBD | FPGA_IRQ_MOUSE);
               bus_space_write_1(iot_fpga, ioh_fpga, FPGA_INT_POL, fpga_reg);

               /* Set interrupts to level triggered */
               fpga_reg = bus_space_read_1(iot_fpga, ioh_fpga, FPGA_INT_TRIG);
               fpga_reg |= (FPGA_IRQ_KYBD | FPGA_IRQ_MOUSE);
               bus_space_write_1(iot_fpga, ioh_fpga, FPGA_INT_TRIG, fpga_reg);

               /* Enable interrupts */
               fpga_reg = bus_space_read_1(iot_fpga, ioh_fpga, FPGA_INT_ENABLE);
               fpga_reg |= (FPGA_IRQ_KYBD | FPGA_IRQ_MOUSE);
               bus_space_write_1(iot_fpga, ioh_fpga, FPGA_INT_ENABLE, fpga_reg);

               bus_space_unmap(&iot_fpga, ioh_fpga, 2);
       }
#endif

}

static int
pbus_print(void *aux, const char *pnp)
{
       struct pbus_attach_args *pba = aux;

       if (pnp)
               printf("%s at %s", pba->pb_name, pnp);

       if (pba->pb_addr != PBUSCF_ADDR_DEFAULT)
               aprint_normal(" addr 0x%08lx", pba->pb_addr);
       if (pba->pb_irq != PBUSCF_IRQ_DEFAULT)
               aprint_normal(" irq %d", pba->pb_irq);

       return (UNCONF);
}

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