// SPDX-License-Identifier: GPL-2.0-or-later
/*
        Mantis VP-1033 driver

        Copyright (C) Manu Abraham (abraham.manu@gmail.com)

*/

#include <linux/signal.h>
#include <linux/sched.h>
#include <linux/interrupt.h>

#include <media/dmxdev.h>
#include <media/dvbdev.h>
#include <media/dvb_demux.h>
#include <media/dvb_frontend.h>
#include <media/dvb_net.h>

#include "stv0299.h"
#include "mantis_common.h"
#include "mantis_ioc.h"
#include "mantis_dvb.h"
#include "mantis_vp1033.h"
#include "mantis_reg.h"

static u8 lgtdqcs001f_inittab[] = {
        0x01, 0x15,
        0x02, 0x30,
        0x03, 0x00,
        0x04, 0x2a,
        0x05, 0x85,
        0x06, 0x02,
        0x07, 0x00,
        0x08, 0x00,
        0x0c, 0x01,
        0x0d, 0x81,
        0x0e, 0x44,
        0x0f, 0x94,
        0x10, 0x3c,
        0x11, 0x84,
        0x12, 0xb9,
        0x13, 0xb5,
        0x14, 0x4f,
        0x15, 0xc9,
        0x16, 0x80,
        0x17, 0x36,
        0x18, 0xfb,
        0x19, 0xcf,
        0x1a, 0xbc,
        0x1c, 0x2b,
        0x1d, 0x27,
        0x1e, 0x00,
        0x1f, 0x0b,
        0x20, 0xa1,
        0x21, 0x60,
        0x22, 0x00,
        0x23, 0x00,
        0x28, 0x00,
        0x29, 0x28,
        0x2a, 0x14,
        0x2b, 0x0f,
        0x2c, 0x09,
        0x2d, 0x05,
        0x31, 0x1f,
        0x32, 0x19,
        0x33, 0xfc,
        0x34, 0x13,
        0xff, 0xff,
};

#define MANTIS_MODEL_NAME       "VP-1033"
#define MANTIS_DEV_TYPE         "DVB-S/DSS"

static int lgtdqcs001f_tuner_set(struct dvb_frontend *fe)
{
        struct dtv_frontend_properties *p = &fe->dtv_property_cache;
        struct mantis_pci *mantis       = fe->dvb->priv;
        struct i2c_adapter *adapter     = &mantis->adapter;

        u8 buf[4];
        u32 div;


        struct i2c_msg msg = {.addr = 0x61, .flags = 0, .buf = buf, .len = sizeof(buf)};

        div = p->frequency / 250;

        buf[0] = (div >> 8) & 0x7f;
        buf[1] =  div & 0xff;
        buf[2] =  0x83;
        buf[3] =  0xc0;

        if (p->frequency < 1531000)
                buf[3] |= 0x04;
        else
                buf[3] &= ~0x04;
        if (i2c_transfer(adapter, &msg, 1) < 0) {
                dprintk(MANTIS_ERROR, 1, "Write: I2C Transfer failed");
                return -EIO;
        }
        msleep_interruptible(100);

        return 0;
}

static int lgtdqcs001f_set_symbol_rate(struct dvb_frontend *fe,
                                       u32 srate, u32 ratio)
{
        u8 aclk = 0;
        u8 bclk = 0;

        if (srate < 1500000) {
                aclk = 0xb7;
                bclk = 0x47;
        } else if (srate < 3000000) {
                aclk = 0xb7;
                bclk = 0x4b;
        } else if (srate < 7000000) {
                aclk = 0xb7;
                bclk = 0x4f;
        } else if (srate < 14000000) {
                aclk = 0xb7;
                bclk = 0x53;
        } else if (srate < 30000000) {
                aclk = 0xb6;
                bclk = 0x53;
        } else if (srate < 45000000) {
                aclk = 0xb4;
                bclk = 0x51;
        }
        stv0299_writereg(fe, 0x13, aclk);
        stv0299_writereg(fe, 0x14, bclk);

        stv0299_writereg(fe, 0x1f, (ratio >> 16) & 0xff);
        stv0299_writereg(fe, 0x20, (ratio >>  8) & 0xff);
        stv0299_writereg(fe, 0x21,  ratio & 0xf0);

        return 0;
}

static struct stv0299_config lgtdqcs001f_config = {
        .demod_address          = 0x68,
        .inittab                = lgtdqcs001f_inittab,
        .mclk                   = 88000000UL,
        .invert                 = 0,
        .skip_reinit            = 0,
        .volt13_op0_op1         = STV0299_VOLT13_OP0,
        .min_delay_ms           = 100,
        .set_symbol_rate        = lgtdqcs001f_set_symbol_rate,
};

static int vp1033_frontend_init(struct mantis_pci *mantis, struct dvb_frontend *fe)
{
        struct i2c_adapter *adapter     = &mantis->adapter;

        int err = 0;

        err = mantis_frontend_power(mantis, POWER_ON);
        if (err == 0) {
                mantis_frontend_soft_reset(mantis);
                msleep(250);

                dprintk(MANTIS_ERROR, 1, "Probing for STV0299 (DVB-S)");
                fe = dvb_attach(stv0299_attach, &lgtdqcs001f_config, adapter);

                if (fe) {
                        fe->ops.tuner_ops.set_params = lgtdqcs001f_tuner_set;
                        dprintk(MANTIS_ERROR, 1, "found STV0299 DVB-S frontend @ 0x%02x",
                                lgtdqcs001f_config.demod_address);

                        dprintk(MANTIS_ERROR, 1, "Mantis DVB-S STV0299 frontend attach success");
                } else {
                        return -1;
                }
        } else {
                dprintk(MANTIS_ERROR, 1, "Frontend on <%s> POWER ON failed! <%d>",
                        adapter->name,
                        err);

                return -EIO;
        }
        mantis->fe = fe;
        dprintk(MANTIS_ERROR, 1, "Done!");

        return 0;
}

struct mantis_hwconfig vp1033_config = {
        .model_name             = MANTIS_MODEL_NAME,
        .dev_type               = MANTIS_DEV_TYPE,
        .ts_size                = MANTIS_TS_204,

        .baud_rate              = MANTIS_BAUD_9600,
        .parity                 = MANTIS_PARITY_NONE,
        .bytes                  = 0,

        .frontend_init          = vp1033_frontend_init,
        .power                  = GPIF_A12,
        .reset                  = GPIF_A13,
};