/*      $NetBSD: j720lcd.c,v 1.5 2009/05/29 14:15:45 rjs Exp $  */

/*-
* Copyright (c) 2006 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by IWAMOTO Toshihiro.
*
* 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 NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``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 FOUNDATION OR CONTRIBUTORS
* 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.
*/

/* Jornada 720 LCD screen driver. */

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: j720lcd.c,v 1.5 2009/05/29 14:15:45 rjs Exp $");

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

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

#include <arm/sa11x0/sa11x0_var.h>
#include <arm/sa11x0/sa11x0_gpioreg.h>
#include <arm/sa11x0/sa11x0_ppcreg.h>
#include <arm/sa11x0/sa11x0_sspreg.h>

#include <hpcarm/dev/j720sspvar.h>
#include <hpcarm/dev/sed1356var.h>

#ifdef DEBUG
#define DPRINTF(arg)    aprint_normal arg
#else
#define DPRINTF(arg)    /* nothing */
#endif

struct j720lcd_softc {
       device_t                sc_dev;

       struct j720ssp_softc    *sc_ssp;
};

static int      j720lcd_match(device_t, cfdata_t, void *);
static void     j720lcd_attach(device_t, device_t, void *);

static int      j720lcd_param(void *, int, long, void *);
int             j720lcd_power(void *, int, long, void *);

CFATTACH_DECL_NEW(j720lcd, sizeof(struct j720lcd_softc),
   j720lcd_match, j720lcd_attach, NULL, NULL);


static int
j720lcd_match(device_t parent, cfdata_t cf, void *aux)
{

       if (!platid_match(&platid, &platid_mask_MACH_HP_JORNADA_7XX))
               return 0;
       if (strcmp(cf->cf_name, "j720lcd") != 0)
               return 0;

       return 1;
}

static void
j720lcd_attach(device_t parent, device_t self, void *aux)
{
       struct j720lcd_softc *sc = device_private(self);
       int brightness, contrast;

       sc->sc_dev = self;
       sc->sc_ssp = device_private(parent);

       /* LCD brightness hooks. */
       config_hook(CONFIG_HOOK_SET, CONFIG_HOOK_BRIGHTNESS,
                   CONFIG_HOOK_SHARE, j720lcd_param, sc);
       config_hook(CONFIG_HOOK_GET, CONFIG_HOOK_BRIGHTNESS,
                   CONFIG_HOOK_SHARE, j720lcd_param, sc);
       config_hook(CONFIG_HOOK_GET, CONFIG_HOOK_BRIGHTNESS_MAX,
                   CONFIG_HOOK_SHARE, j720lcd_param, sc);

       /* LCD contrast hooks. */
       config_hook(CONFIG_HOOK_SET, CONFIG_HOOK_CONTRAST,
                   CONFIG_HOOK_SHARE, j720lcd_param, sc);
       config_hook(CONFIG_HOOK_GET, CONFIG_HOOK_CONTRAST,
                   CONFIG_HOOK_SHARE, j720lcd_param, sc);
       config_hook(CONFIG_HOOK_GET, CONFIG_HOOK_CONTRAST_MAX,
                   CONFIG_HOOK_SHARE, j720lcd_param, sc);

       /* LCD power hook. */
#if 0
       config_hook(CONFIG_HOOK_POWERCONTROL,
                   CONFIG_HOOK_POWERCONTROL_LCDLIGHT,
                   CONFIG_HOOK_SHARE, j720lcd_power, sc);
#endif

       /* Get default brightness/contrast values. */
       config_hook_call(CONFIG_HOOK_GET, CONFIG_HOOK_BRIGHTNESS, &brightness);
       config_hook_call(CONFIG_HOOK_GET, CONFIG_HOOK_CONTRAST, &contrast);

       aprint_normal(": brightness %d, contrast %d\n", brightness, contrast);
}

static int
j720lcd_param(void *ctx, int type, long id, void *msg)
{
       struct j720lcd_softc *sc = ctx;
       struct j720ssp_softc *ssp = sc->sc_ssp;
       uint32_t data[2], len;
       const int maxval = 255;
       int i, s;

       switch (type) {
       case CONFIG_HOOK_GET:
               switch (id) {
               case CONFIG_HOOK_BRIGHTNESS_MAX:
               case CONFIG_HOOK_CONTRAST_MAX:
                       *(int *)msg = maxval;
                       return 1;
               case CONFIG_HOOK_BRIGHTNESS:
                       data[0] = 0xd6;
                       data[1] = 0x11;
                       len = 2;
                       break;
               case CONFIG_HOOK_CONTRAST:
                       data[0] = 0xd4;
                       data[1] = 0x11;
                       len = 2;
                       break;
               default:
                       return 0;
               }
               break;

       case CONFIG_HOOK_SET:
               switch (id) {
               case CONFIG_HOOK_BRIGHTNESS:
                       if (*(int *)msg >= 0) {
                               data[0] = 0xd3;
                               data[1] = maxval - *(int *)msg;
                               len = 2;
                       } else {
                               /* XXX hack */
                               data[0] = 0xdf;
                               len = 1;
                       }
                       break;
               case CONFIG_HOOK_CONTRAST:
                       data[0] = 0xd1;
                       data[1] = maxval - *(int *)msg;
                       len = 2;
                       break;
               default:
                       return 0;
               }
               break;

       default:
               return 0;
       }

       s = splbio();
       bus_space_write_4(ssp->sc_iot, ssp->sc_gpioh, SAGPIO_PCR, 0x2000000);

       for (i = 0; i < len; i++) {
               if (j720ssp_readwrite(ssp, 1, data[i], &data[i], 500) < 0)
                       goto out;
       }
       bus_space_write_4(ssp->sc_iot, ssp->sc_gpioh, SAGPIO_PSR, 0x2000000);
       splx(s);

       if (type == CONFIG_HOOK_SET)
               return 1;

       *(int *)msg = maxval - data[1];

       return 1;

out:
       bus_space_write_4(ssp->sc_iot, ssp->sc_gpioh, SAGPIO_PSR, 0x2000000);

       /* reset SSP */
       bus_space_write_4(ssp->sc_iot, ssp->sc_ssph, SASSP_CR0, 0x307);
       delay(100);
       bus_space_write_4(ssp->sc_iot, ssp->sc_ssph, SASSP_CR0, 0x387);

       splx(s);

       DPRINTF(("j720lcd_param: error %x %x\n", data[0], data[1]));
       return 0;

}

int
j720lcd_power(void *ctx, int type, long id, void *msg)
{
       struct sed1356_softc *sc = ctx;
       struct sa11x0_softc *psc = sc->sc_parent;
       uint32_t reg;
       int val;

       if (type != CONFIG_HOOK_POWERCONTROL ||
           id != CONFIG_HOOK_POWERCONTROL_LCDLIGHT)
               return 0;

       sed1356_init_brightness(sc, 0);
       sed1356_init_contrast(sc, 0);

       if (msg) {
               bus_space_write_1(sc->sc_iot, sc->sc_regh, 0x1f0, 0);

               reg = bus_space_read_4(psc->sc_iot, psc->sc_ppch, SAPPC_PSR);
               reg |= 0x1;
               bus_space_write_4(psc->sc_iot, psc->sc_ppch, SAPPC_PSR, reg);
               delay(50000);

               val = sc->sc_contrast;
               config_hook_call(CONFIG_HOOK_SET, CONFIG_HOOK_CONTRAST, &val);
               delay(100000);

               reg = bus_space_read_4(psc->sc_iot, psc->sc_ppch, SAPPC_PSR);
               reg |= 0x4;
               bus_space_write_4(psc->sc_iot, psc->sc_ppch, SAPPC_PSR, reg);

               val = sc->sc_brightness;
               config_hook_call(CONFIG_HOOK_SET, CONFIG_HOOK_BRIGHTNESS, &val);

               reg = bus_space_read_4(psc->sc_iot, psc->sc_ppch, SAPPC_PSR);
               reg |= 0x2;
               bus_space_write_4(psc->sc_iot, psc->sc_ppch, SAPPC_PSR, reg);
       } else {
               reg = bus_space_read_4(psc->sc_iot, psc->sc_ppch, SAPPC_PSR);
               reg &= ~0x2;
               bus_space_write_4(psc->sc_iot, psc->sc_ppch, SAPPC_PSR, reg);
               reg &= ~0x4;
               bus_space_write_4(psc->sc_iot, psc->sc_ppch, SAPPC_PSR, reg);
               delay(100000);

               val = -2;
               config_hook_call(CONFIG_HOOK_SET, CONFIG_HOOK_BRIGHTNESS, &val);

               bus_space_write_1(sc->sc_iot, sc->sc_regh, 0x1f0, 1);

               delay(100000);
               reg = bus_space_read_4(psc->sc_iot, psc->sc_ppch, SAPPC_PSR);
               reg &= ~0x1;
               bus_space_write_4(psc->sc_iot, psc->sc_ppch, SAPPC_PSR, reg);
       }

       return 1;
}

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