/* $NetBSD: opb.c,v 1.29 2021/08/07 16:19:03 thorpej 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) 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: opb.c,v 1.29 2021/08/07 16:19:03 thorpej Exp $");

#include "locators.h"

#ifdef _KERNEL_OPT
#include "opt_emac.h"
#endif

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

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

#include <powerpc/ibm4xx/dev/opbreg.h>
#include <powerpc/ibm4xx/dev/opbvar.h>
#include <powerpc/ibm4xx/dev/plbvar.h>
#include <powerpc/ibm4xx/dev/rgmiireg.h>
#include <powerpc/ibm4xx/dev/zmiireg.h>

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

#include <powerpc/ibm4xx/ibm405gp.h>
#include <powerpc/ibm4xx/amcc405ex.h>

static int opb_get_frequency_405gp(void);
static int opb_get_frequency_405ex(void);


/*
* The devices on the On-chip Peripheral Bus to the 405GP/EX CPU.
*/
const struct opb_dev {
       int pvr;
       const char *name;
       bus_addr_t addr;
       int instance;
       int irq;
       int flags;
} opb_devs [] = {
       /* IBM405GP */
       { IBM405GP,     "com",  IBM405GP_UART0_BASE,    0,  0, 0 },
       { IBM405GP,     "com",  IBM405GP_UART1_BASE,    1,  1, 0 },
       { IBM405GP,     "emac", IBM405GP_EMAC0_BASE,    0, 15, 0 },
       { IBM405GP,     "opbgpio",      IBM405GP_GPIO0_BASE,    0, -1, 0 },
       { IBM405GP,     "gpiic",IBM405GP_IIC0_BASE,     0,  2, 0 },
       { IBM405GP,     "wdog", -1,                     0, -1, 0 },

       /* IBM405GPR */
       { IBM405GPR,    "com",  IBM405GP_UART0_BASE,    0,  0, 0 },
       { IBM405GPR,    "com",  IBM405GP_UART1_BASE,    1,  1, 0 },
       { IBM405GPR,    "emac", IBM405GP_EMAC0_BASE,    0, 15, 0 },
       { IBM405GPR,    "opbgpio",      IBM405GP_GPIO0_BASE,    0, -1, 0 },
       { IBM405GPR,    "gpiic",IBM405GP_IIC0_BASE,     0,  2, 0 },
       { IBM405GPR,    "wdog", -1,                     0, -1, 0 },

       /* AMCC405EX */
       { AMCC405EX,    "gpt",  AMCC405EX_GPT0_BASE,     0, -1, 0 },
       { AMCC405EX,    "com",  AMCC405EX_UART0_BASE,    0, 26, 0 },
       { AMCC405EX,    "com",  AMCC405EX_UART1_BASE,    1,  1, 0 },
       { AMCC405EX,    "gpiic",AMCC405EX_IIC0_BASE,     0,  2, 0 },
       { AMCC405EX,    "gpiic",AMCC405EX_IIC1_BASE,     1,  7, 0 },
       { AMCC405EX,    "scp",  AMCC405EX_SCP0_BASE,     0,  8, 0 }, /* SPI */
       { AMCC405EX,    "opbgpio",      AMCC405EX_GPIO0_BASE,   -1, -1, 0 },
       { AMCC405EX,    "emac", AMCC405EX_EMAC0_BASE,    0, 24,
           OPB_FLAGS_EMAC_GBE | OPB_FLAGS_EMAC_STACV2 | OPB_FLAGS_EMAC_HT256 |\
           OPB_FLAGS_EMAC_RMII_RGMII },
       { AMCC405EX,    "emac", AMCC405EX_EMAC1_BASE,    1, 25,
           OPB_FLAGS_EMAC_GBE | OPB_FLAGS_EMAC_STACV2 | OPB_FLAGS_EMAC_HT256 |\
           OPB_FLAGS_EMAC_RMII_RGMII },
       { AMCC405EX,    "wdog", -1,                      0, -1, 0 },

       { 0,             NULL }
};

int (*opb_get_frequency)(void);
const struct opb_param {
       int pvr;
       bus_addr_t base;
       bus_addr_t limit;
       int (*opb_get_frequency)(void);
       bus_addr_t zmii_base;
       bus_addr_t rgmii_base;
} opb_params[] = {
       { IBM405GP,
           IBM405GP_IP_BASE,   IBM405GP_IP_BASE + OPBREG_SIZE,
           opb_get_frequency_405gp,
           0,                          0 },
       { IBM405GPR,
           IBM405GP_IP_BASE,   IBM405GP_IP_BASE + OPBREG_SIZE,
           opb_get_frequency_405gp,
           0,                          0 },
       { AMCC405EX,
           AMCC405EX_OPB_BASE, AMCC405EX_OPB_BASE + OPBREG_SIZE,
           opb_get_frequency_405ex,
           0,                          AMCC405EX_RGMIIB0_BASE},

       { 0 }
};

static int      opb_match(device_t, cfdata_t, void *);
static void     opb_attach(device_t, device_t, void *);
static int      opb_submatch(device_t, cfdata_t, const int *, void *);
static int      opb_print(void *, const char *);

CFATTACH_DECL_NEW(opb, sizeof(struct opb_softc),
   opb_match, opb_attach, NULL, NULL);

static struct powerpc_bus_space opb_tag = {
       _BUS_SPACE_BIG_ENDIAN|_BUS_SPACE_MEM_TYPE,
       0x00000000,
};
static char ex_storage[EXTENT_FIXED_STORAGE_SIZE(8)]
   __attribute__((aligned(8)));
static int opb_tag_init_done;

/*
* Probe for the opb; always succeeds.
*/
static int
opb_match(device_t parent, cfdata_t cf, void *aux)
{
       struct opb_attach_args *oaa = aux;

       /* match only opb devices */
       if (strcmp(oaa->opb_name, cf->cf_name) != 0)
               return 0;

       return 1;
}

static int
opb_submatch(device_t parent, cfdata_t cf, const int *ldesc, void *aux)
{
       struct opb_attach_args *oaa = aux;

       if (cf->cf_loc[OPBCF_ADDR] != OPBCF_ADDR_DEFAULT &&
           cf->cf_loc[OPBCF_ADDR] != oaa->opb_addr)
               return 0;

       return config_match(parent, cf, aux);
}

/*
* Attach the on-chip peripheral bus.
*/
static void
opb_attach(device_t parent, device_t self, void *aux)
{
       struct opb_softc *sc = device_private(self);
       struct plb_attach_args *paa = aux;
       struct opb_attach_args oaa;
       int i, pvr;

       aprint_naive("\n");
       aprint_normal("\n");
       pvr = mfpvr() >> 16;

       sc->sc_dev = self;
       sc->sc_iot = opb_get_bus_space_tag();

       for (i = 0; opb_params[i].pvr != 0 && opb_params[i].pvr != pvr; i++)
               ;
       if (opb_params[i].pvr == 0)
               panic("opb_get_bus_space_tag: no params for this CPU!");
       opb_get_frequency = opb_params[i].opb_get_frequency;
#ifdef EMAC_ZMII_PHY
       if (opb_params[i].zmii_base != 0)
               bus_space_map(sc->sc_iot, opb_params[i].zmii_base, ZMII0_SIZE,
                   0, &sc->sc_zmiih);
#endif
#ifdef EMAC_RGMII_PHY
       if (opb_params[i].rgmii_base != 0)
               bus_space_map(sc->sc_iot, opb_params[i].rgmii_base, RGMII0_SIZE,
                   0, &sc->sc_rgmiih);
#endif

       for (i = 0; opb_devs[i].name != NULL; i++) {
               if (opb_devs[i].pvr != pvr)
                       continue;
               oaa.opb_name = opb_devs[i].name;
               oaa.opb_addr = opb_devs[i].addr;
               oaa.opb_instance = opb_devs[i].instance;
               oaa.opb_irq = opb_devs[i].irq;
               oaa.opb_bt = sc->sc_iot;
               oaa.opb_dmat = paa->plb_dmat;
               oaa.opb_flags = opb_devs[i].flags;

               config_found(self, &oaa, opb_print,
                   CFARGS(.submatch = opb_submatch));
       }
}

static int
opb_print(void *aux, const char *pnp)
{
       struct opb_attach_args *oaa = aux;

       if (pnp)
               aprint_normal("%s at %s", oaa->opb_name, pnp);

       if (oaa->opb_addr != OPBCF_ADDR_DEFAULT)
               aprint_normal(" addr 0x%08lx", oaa->opb_addr);
       if (oaa->opb_irq != OPBCF_IRQ_DEFAULT)
               aprint_normal(" irq %d", oaa->opb_irq);

       return UNCONF;
}

bus_space_tag_t
opb_get_bus_space_tag(void)
{
       int i, pvr;

       if (!opb_tag_init_done) {
               pvr = mfpvr() >> 16;

               for (i = 0; opb_params[i].pvr != 0 && opb_params[i].pvr != pvr;
                   i++)
                       ;
               if (opb_params[i].pvr == 0)
                       panic("opb_get_bus_space_tag: no params for this CPU!");

               opb_tag.pbs_base = opb_params[i].base;
               opb_tag.pbs_limit = opb_params[i].limit;

               if (bus_space_init(&opb_tag, "opbtag",
                   ex_storage, sizeof(ex_storage)))
                       panic("opb_attach: Failed to initialise opb_tag");
               opb_tag_init_done = 1;
       }

       return &opb_tag;
}

static int
opb_get_frequency_405gp(void)
{
       prop_number_t pn;
       uint32_t pllmr;
       unsigned int processor_freq, plb_freq, opb_freq;

       pn = prop_dictionary_get(board_properties, "processor-frequency");
       KASSERT(pn != NULL);
       processor_freq = (unsigned int) prop_number_integer_value(pn);
       pllmr = mfdcr(DCR_CPC0_PLLMR);
       plb_freq = processor_freq / CPC0_PLLMR_CBDV(pllmr);
       opb_freq = plb_freq / CPC0_PLLMR_OPDV(pllmr);

       return opb_freq;
}

static int
opb_get_frequency_405ex(void)
{
       prop_number_t pn;
       unsigned int processor_freq, plb_freq, opb_freq;

       pn = prop_dictionary_get(board_properties, "processor-frequency");
       KASSERT(pn != NULL);
       processor_freq = (unsigned int) prop_number_integer_value(pn);
       plb_freq = processor_freq / CPR0_PLBDV0(mfcpr(DCR_CPR0_PLBD));
       opb_freq = plb_freq / CPR0_OPBDV0(mfcpr(DCR_CPR0_OPBD));

       return opb_freq;
}

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