/*
 * Copyright (C) 2009 Francisco Jerez.
 * All Rights Reserved.
 *
 * Permission is hereby granted, free of charge, to any person obtaining
 * a copy of this software and associated documentation files (the
 * "Software"), to deal in the Software without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish,
 * distribute, sublicense, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to
 * the following conditions:
 *
 * The above copyright notice and this permission notice (including the
 * next paragraph) shall be included in all copies or substantial
 * portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
 * IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 *
 */
#include "priv.h"

static int
nv10_gpio_sense(struct nvkm_gpio *gpio, int line)
{
        struct nvkm_device *device = gpio->subdev.device;
        if (line < 2) {
                line = line * 16;
                line = nvkm_rd32(device, 0x600818) >> line;
                return !!(line & 0x0100);
        } else
        if (line < 10) {
                line = (line - 2) * 4;
                line = nvkm_rd32(device, 0x60081c) >> line;
                return !!(line & 0x04);
        } else
        if (line < 14) {
                line = (line - 10) * 4;
                line = nvkm_rd32(device, 0x600850) >> line;
                return !!(line & 0x04);
        }

        return -EINVAL;
}

static int
nv10_gpio_drive(struct nvkm_gpio *gpio, int line, int dir, int out)
{
        struct nvkm_device *device = gpio->subdev.device;
        u32 reg, mask, data;

        if (line < 2) {
                line = line * 16;
                reg  = 0x600818;
                mask = 0x00000011;
                data = (dir << 4) | out;
        } else
        if (line < 10) {
                line = (line - 2) * 4;
                reg  = 0x60081c;
                mask = 0x00000003;
                data = (dir << 1) | out;
        } else
        if (line < 14) {
                line = (line - 10) * 4;
                reg  = 0x600850;
                mask = 0x00000003;
                data = (dir << 1) | out;
        } else {
                return -EINVAL;
        }

        nvkm_mask(device, reg, mask << line, data << line);
        return 0;
}

static void
nv10_gpio_intr_stat(struct nvkm_gpio *gpio, u32 *hi, u32 *lo)
{
        struct nvkm_device *device = gpio->subdev.device;
        u32 intr = nvkm_rd32(device, 0x001104);
        u32 stat = nvkm_rd32(device, 0x001144) & intr;
        *lo = (stat & 0xffff0000) >> 16;
        *hi = (stat & 0x0000ffff);
        nvkm_wr32(device, 0x001104, intr);
}

static void
nv10_gpio_intr_mask(struct nvkm_gpio *gpio, u32 type, u32 mask, u32 data)
{
        struct nvkm_device *device = gpio->subdev.device;
        u32 inte = nvkm_rd32(device, 0x001144);
        if (type & NVKM_GPIO_LO)
                inte = (inte & ~(mask << 16)) | (data << 16);
        if (type & NVKM_GPIO_HI)
                inte = (inte & ~mask) | data;
        nvkm_wr32(device, 0x001144, inte);
}

static const struct nvkm_gpio_func
nv10_gpio = {
        .lines = 16,
        .intr_stat = nv10_gpio_intr_stat,
        .intr_mask = nv10_gpio_intr_mask,
        .drive = nv10_gpio_drive,
        .sense = nv10_gpio_sense,
};

int
nv10_gpio_new(struct nvkm_device *device, enum nvkm_subdev_type type, int inst,
              struct nvkm_gpio **pgpio)
{
        return nvkm_gpio_new_(&nv10_gpio, device, type, inst, pgpio);
}