/*      $NetBSD: nbppcon.c,v 1.5 2021/08/07 16:18:53 thorpej Exp $ */
/*
* Copyright (c) 2011 KIYOHARA Takashi
* 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.
*
* 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: nbppcon.c,v 1.5 2021/08/07 16:18:53 thorpej Exp $");

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

#include <machine/platid.h>
#include <machine/platid_mask.h>

#include <arm/xscale/pxa2x0_i2c.h>

#include <hpcarm/dev/nbppconvar.h>

#include <dev/i2c/i2cvar.h>
#include <dev/i2c/at24cxxvar.h>

#include "locators.h"

#define NBPPCON_ADDR    0x13


struct nbppcon_softc {
       device_t sc_dev;
       i2c_tag_t sc_tag;
       int sc_address;

       struct callback {
               int cb_tag;
               int (*cb_func)(void *, int, char *);
               void *cb_arg;
       } sc_cbs[2];
};

static int nbppcon_match(device_t, cfdata_t, void *);
static void nbppcon_attach(device_t, device_t, void *);

static int nbppcon_search(device_t, cfdata_t, const int *, void *);
static int nbppcon_print(void *aux, const char *pnp);

CFATTACH_DECL_NEW(nbppcon, sizeof(struct nbppcon_softc),
   nbppcon_match, nbppcon_attach, NULL, NULL);


/* ARGSUSED */
static int
nbppcon_match(device_t parent, cfdata_t match, void *aux)
{
       struct i2c_attach_args *ia = aux;

       if (ia->ia_addr != NBPPCON_ADDR ||
           !platid_match(&platid, &platid_mask_MACH_PSIONTEKLOGIX_NETBOOK_PRO))
                return 0;

       return I2C_MATCH_ADDRESS_AND_PROBE;
}

/* ARGSUSED */
static void
nbppcon_attach(device_t parent, device_t self, void *aux)
{
       struct nbppcon_softc *sc = device_private(self);
       struct i2c_attach_args *ia = aux;
       int rv;
       char buf[128];

       sc->sc_dev = self;
       sc->sc_tag = ia->ia_tag;
       sc->sc_address = ia->ia_addr;

       aprint_naive("\n");
       aprint_normal(": NETBOOK PRO PCon\n");

#define NVRAM_ADDR      0x53
#define NVRAM_DATA_REV  0x14
       rv = seeprom_bootstrap_read(sc->sc_tag, NVRAM_ADDR, 0x00, 128,
           buf, sizeof(buf));
       if (rv == 0)
               aprint_normal_dev(self, "NETBOOK PRO Rev.%c\n",
                   buf[NVRAM_DATA_REV] - '0' + '@');
       else
               aprint_error_dev(self, "NVRAM read failed\n");

       config_search(self, NULL,
           CFARGS(.search = nbppcon_search));
}

/* ARGSUSED */
static int
nbppcon_search(device_t self, cfdata_t cf, const int *ldesc, void *aux)
{
       struct nbppcon_attach_args pcon;

       pcon.aa_name = cf->cf_name;
       pcon.aa_tag = cf->cf_loc[NBPPCONCF_TAG];

       if (config_probe(self, cf, &pcon))
               config_attach(self, cf, &pcon, nbppcon_print, CFARGS_NONE);

       return 0;
}

/* ARGSUSED */
static int
nbppcon_print(void *aux, const char *pnp)
{

       if (pnp != NULL)
               aprint_normal("%s", pnp);
       return UNCONF;
}


void *
nbppcon_regist_callback(device_t self,
                       int tag, int (*func)(void *, int, char *), void *arg)
{
       struct nbppcon_softc *sc = device_private(self);
       int i;

       for (i = 0; i < __arraycount(sc->sc_cbs); i++)
               if (sc->sc_cbs[i].cb_func == NULL) {
                       sc->sc_cbs[i].cb_tag = tag;
                       sc->sc_cbs[i].cb_func = func;
                       sc->sc_cbs[i].cb_arg = arg;
                       return func;
               }

       return NULL;
}

int
nbppcon_intr(device_t self, int buflen, char *buf)
{
       struct nbppcon_softc *sc = device_private(self);
       struct callback *cb;
       int i;

       for (i = 0; i < __arraycount(sc->sc_cbs); i++) {
               cb = &sc->sc_cbs[i];
               if (cb->cb_func != NULL &&
                   cb->cb_tag == buf[0])
                       return cb->cb_func(cb->cb_arg, buflen, buf);
       }
       aprint_error_dev(sc->sc_dev, "unknown tag received: 0x%02x\n", buf[0]);
       return 0;
}

int
nbppcon_poll(device_t self, int tag, int buflen, char *buf)
{
       struct nbppcon_softc *sc = device_private(self);
       int rv;

       if (iic_acquire_bus(sc->sc_tag, I2C_F_POLL)) {
               aprint_error_dev(sc->sc_dev,
                   "%s: acquire bus failed\n", __func__);
               return -1;
       }

       do {
               extern int nbpiic_poll(void *, int, char *);

               rv = nbpiic_poll(sc->sc_tag->ic_cookie, buflen, buf);
               if (rv > 0 && buf[0] == tag)
                       break;
       } while (rv == 0 || buf[0] != tag);

       iic_release_bus(sc->sc_tag, I2C_F_POLL);

       return rv;
}

int
nbppcon_kbd_ready(device_t self)
{
       struct nbppcon_softc *sc = device_private(self);
       int rv;
       char cmd[1], data[1];

       if (iic_acquire_bus(sc->sc_tag, I2C_F_POLL)) {
               aprint_error_dev(sc->sc_dev,
                   "%s: acquire bus failed\n", __func__);
               return -1;
       }

       cmd[0] = 0x00;          /* Keyboard */
       data[0] = 0x00;         /* 0x00:Ready, 0x01:Busy? */
       rv = iic_exec(sc->sc_tag, I2C_OP_WRITE_WITH_STOP, sc->sc_address,
           cmd, sizeof(cmd), data, sizeof(data), I2C_F_POLL);

       cpu_dcache_wbinv_all();         /* XXXX: Why? */

       iic_release_bus(sc->sc_tag, I2C_F_POLL);

       return rv;
}

int
nbppcon_pwr_hwreset(device_t self)
{
       struct nbppcon_softc *sc = device_private(self);
       int rv;
       char cmd[1], data[1];

       if (iic_acquire_bus(sc->sc_tag, I2C_F_POLL)) {
               aprint_error_dev(sc->sc_dev,
                   "%s: acquire bus failed\n", __func__);
               return -1;
       }

       cmd[0] = 0x05;          /* POWER */
       data[0] = 0x00;         /* HWReset */
#if 0
       rv = iic_exec(sc->sc_tag, I2C_OP_WRITE_WITH_STOP, sc->sc_address,
           cmd, sizeof(cmd), data, sizeof(data), I2C_F_POLL);
#else   /* XXXX: Oops, ensure HWReset, ignore cmd and data. */
       rv = iic_exec(sc->sc_tag, I2C_OP_WRITE_WITH_STOP, sc->sc_address + 1,
           cmd, sizeof(cmd), data, sizeof(data), I2C_F_POLL);
#endif

       iic_release_bus(sc->sc_tag, I2C_F_POLL);

       return rv;
}

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