/* $OpenBSD: imxiicvar.h,v 1.2 2022/06/28 23:43:13 naddy Exp $ */
/*
 * Copyright (c) 2013 Patrick Wildt <patrick@blueri.se>
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

#ifndef IMXIICVAR_H
#define IMXIICVAR_H

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

#include <dev/i2c/i2cvar.h>

#define I2C_TYPE_IMX21  0
#define I2C_TYPE_VF610  1

struct imxiic_softc {
        struct device           sc_dev;
        bus_space_tag_t         sc_iot;
        bus_space_handle_t      sc_ioh;
        bus_size_t              sc_ios;
        int                     sc_reg_shift;
        int                     sc_type;
        int                     sc_bitrate;
        uint32_t                sc_clkrate;

        const struct imxiic_clk_pair *sc_clk_div;
        int                     sc_clk_ndiv;

        struct rwlock           sc_buslock;
        struct i2c_controller   i2c_tag;

        uint16_t                frequency;
        uint16_t                stopped;
};

void imxiic_enable(struct imxiic_softc *, int);
void imxiic_setspeed(struct imxiic_softc *, u_int);

int imxiic_i2c_acquire_bus(void *, int);
void imxiic_i2c_release_bus(void *, int);
int imxiic_i2c_exec(void *, i2c_op_t, i2c_addr_t, const void *, size_t,
    void *, size_t, int);

struct imxiic_clk_pair {
        uint16_t div;
        uint16_t val;
};

static const struct imxiic_clk_pair imxiic_imx21_clk_div[50] = {
        { 22,   0x20 }, { 24,   0x21 }, { 26,   0x22 }, { 28,   0x23 },
        { 30,   0x00 }, { 32,   0x24 }, { 36,   0x25 }, { 40,   0x26 },
        { 42,   0x03 }, { 44,   0x27 }, { 48,   0x28 }, { 52,   0x05 },
        { 56,   0x29 }, { 60,   0x06 }, { 64,   0x2A }, { 72,   0x2B },
        { 80,   0x2C }, { 88,   0x09 }, { 96,   0x2D }, { 104,  0x0A },
        { 112,  0x2E }, { 128,  0x2F }, { 144,  0x0C }, { 160,  0x30 },
        { 192,  0x31 }, { 224,  0x32 }, { 240,  0x0F }, { 256,  0x33 },
        { 288,  0x10 }, { 320,  0x34 }, { 384,  0x35 }, { 448,  0x36 },
        { 480,  0x13 }, { 512,  0x37 }, { 576,  0x14 }, { 640,  0x38 },
        { 768,  0x39 }, { 896,  0x3A }, { 960,  0x17 }, { 1024, 0x3B },
        { 1152, 0x18 }, { 1280, 0x3C }, { 1536, 0x3D }, { 1792, 0x3E },
        { 1920, 0x1B }, { 2048, 0x3F }, { 2304, 0x1C }, { 2560, 0x1D },
        { 3072, 0x1E }, { 3840, 0x1F }
};

static const struct imxiic_clk_pair imxiic_vf610_clk_div[60] = {
        { 20,   0x00 }, { 22,   0x01 }, { 24,   0x02 }, { 26,   0x03 },
        { 28,   0x04 }, { 30,   0x05 }, { 32,   0x09 }, { 34,   0x06 },
        { 36,   0x0A }, { 40,   0x07 }, { 44,   0x0C }, { 48,   0x0D },
        { 52,   0x43 }, { 56,   0x0E }, { 60,   0x45 }, { 64,   0x12 },
        { 68,   0x0F }, { 72,   0x13 }, { 80,   0x14 }, { 88,   0x15 },
        { 96,   0x19 }, { 104,  0x16 }, { 112,  0x1A }, { 128,  0x17 },
        { 136,  0x4F }, { 144,  0x1C }, { 160,  0x1D }, { 176,  0x55 },
        { 192,  0x1E }, { 208,  0x56 }, { 224,  0x22 }, { 228,  0x24 },
        { 240,  0x1F }, { 256,  0x23 }, { 288,  0x5C }, { 320,  0x25 },
        { 384,  0x26 }, { 448,  0x2A }, { 480,  0x27 }, { 512,  0x2B },
        { 576,  0x2C }, { 640,  0x2D }, { 768,  0x31 }, { 896,  0x32 },
        { 960,  0x2F }, { 1024, 0x33 }, { 1152, 0x34 }, { 1280, 0x35 },
        { 1536, 0x36 }, { 1792, 0x3A }, { 1920, 0x37 }, { 2048, 0x3B },
        { 2304, 0x3C }, { 2560, 0x3D }, { 3072, 0x3E }, { 3584, 0x7A },
        { 3840, 0x3F }, { 4096, 0x7B }, { 5120, 0x7D }, { 6144, 0x7E },
};

#endif