root/drivers/media/pci/ddbridge/ddbridge-max.c
// SPDX-License-Identifier: GPL-2.0
/*
 * ddbridge-max.c: Digital Devices bridge MAX card support
 *
 * Copyright (C) 2010-2017 Digital Devices GmbH
 *                         Ralph Metzler <rjkm@metzlerbros.de>
 *                         Marcus Metzler <mocm@metzlerbros.de>
 */

#include <linux/module.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/delay.h>
#include <linux/slab.h>
#include <linux/poll.h>
#include <linux/io.h>
#include <linux/pci.h>
#include <linux/pci_ids.h>
#include <linux/timer.h>
#include <linux/i2c.h>
#include <linux/swab.h>
#include <linux/vmalloc.h>

#include "ddbridge.h"
#include "ddbridge-regs.h"
#include "ddbridge-io.h"
#include "ddbridge-mci.h"

#include "ddbridge-max.h"
#include "mxl5xx.h"

/******************************************************************************/

/* MaxS4/8 related modparams */
static int fmode;
module_param(fmode, int, 0444);
MODULE_PARM_DESC(fmode, "frontend emulation mode");

static int fmode_sat = -1;
module_param(fmode_sat, int, 0444);
MODULE_PARM_DESC(fmode_sat, "set frontend emulation mode sat");

static int old_quattro;
module_param(old_quattro, int, 0444);
MODULE_PARM_DESC(old_quattro, "old quattro LNB input order ");

/******************************************************************************/

static int lnb_command(struct ddb *dev, u32 link, u32 lnb, u32 cmd)
{
        u32 c, v = 0, tag = DDB_LINK_TAG(link);

        v = LNB_TONE & (dev->link[link].lnb.tone << (15 - lnb));
        ddbwritel(dev, cmd | v, tag | LNB_CONTROL(lnb));
        for (c = 0; c < 10; c++) {
                v = ddbreadl(dev, tag | LNB_CONTROL(lnb));
                if ((v & LNB_BUSY) == 0)
                        break;
                msleep(20);
        }
        if (c == 10)
                dev_info(dev->dev, "%s lnb = %08x  cmd = %08x\n",
                         __func__, lnb, cmd);
        return 0;
}

static int max_send_master_cmd(struct dvb_frontend *fe,
                               struct dvb_diseqc_master_cmd *cmd)
{
        struct ddb_input *input = fe->sec_priv;
        struct ddb_port *port = input->port;
        struct ddb *dev = port->dev;
        struct ddb_dvb *dvb = &port->dvb[input->nr & 1];
        u32 tag = DDB_LINK_TAG(port->lnr);
        int i;
        u32 fmode = dev->link[port->lnr].lnb.fmode;

        if (fmode == 2 || fmode == 1)
                return 0;
        if (dvb->diseqc_send_master_cmd)
                dvb->diseqc_send_master_cmd(fe, cmd);

        mutex_lock(&dev->link[port->lnr].lnb.lock);
        ddbwritel(dev, 0, tag | LNB_BUF_LEVEL(dvb->input));
        for (i = 0; i < cmd->msg_len; i++)
                ddbwritel(dev, cmd->msg[i], tag | LNB_BUF_WRITE(dvb->input));
        lnb_command(dev, port->lnr, dvb->input, LNB_CMD_DISEQC);
        mutex_unlock(&dev->link[port->lnr].lnb.lock);
        return 0;
}

static int lnb_send_diseqc(struct ddb *dev, u32 link, u32 input,
                           struct dvb_diseqc_master_cmd *cmd)
{
        u32 tag = DDB_LINK_TAG(link);
        int i;

        ddbwritel(dev, 0, tag | LNB_BUF_LEVEL(input));
        for (i = 0; i < cmd->msg_len; i++)
                ddbwritel(dev, cmd->msg[i], tag | LNB_BUF_WRITE(input));
        lnb_command(dev, link, input, LNB_CMD_DISEQC);
        return 0;
}

static int lnb_set_sat(struct ddb *dev, u32 link, u32 input, u32 sat, u32 band,
                       u32 hor)
{
        struct dvb_diseqc_master_cmd cmd = {
                .msg = {0xe0, 0x10, 0x38, 0xf0, 0x00, 0x00},
                .msg_len = 4
        };
        cmd.msg[3] = 0xf0 | (((sat << 2) & 0x0c) | (band ? 1 : 0) |
                (hor ? 2 : 0));
        return lnb_send_diseqc(dev, link, input, &cmd);
}

static int lnb_set_tone(struct ddb *dev, u32 link, u32 input,
                        enum fe_sec_tone_mode tone)
{
        int s = 0;
        u32 mask = (1ULL << input);

        switch (tone) {
        case SEC_TONE_OFF:
                if (!(dev->link[link].lnb.tone & mask))
                        return 0;
                dev->link[link].lnb.tone &= ~(1ULL << input);
                break;
        case SEC_TONE_ON:
                if (dev->link[link].lnb.tone & mask)
                        return 0;
                dev->link[link].lnb.tone |= (1ULL << input);
                break;
        default:
                s = -EINVAL;
                break;
        }
        if (!s)
                s = lnb_command(dev, link, input, LNB_CMD_NOP);
        return s;
}

static int lnb_set_voltage(struct ddb *dev, u32 link, u32 input,
                           enum fe_sec_voltage voltage)
{
        int s = 0;

        if (dev->link[link].lnb.oldvoltage[input] == voltage)
                return 0;
        switch (voltage) {
        case SEC_VOLTAGE_OFF:
                if (dev->link[link].lnb.voltage[input])
                        return 0;
                lnb_command(dev, link, input, LNB_CMD_OFF);
                break;
        case SEC_VOLTAGE_13:
                lnb_command(dev, link, input, LNB_CMD_LOW);
                break;
        case SEC_VOLTAGE_18:
                lnb_command(dev, link, input, LNB_CMD_HIGH);
                break;
        default:
                s = -EINVAL;
                break;
        }
        dev->link[link].lnb.oldvoltage[input] = voltage;
        return s;
}

static int max_set_input_unlocked(struct dvb_frontend *fe, int in)
{
        struct ddb_input *input = fe->sec_priv;
        struct ddb_port *port = input->port;
        struct ddb *dev = port->dev;
        struct ddb_dvb *dvb = &port->dvb[input->nr & 1];
        int res = 0;

        if (in > 3)
                return -EINVAL;
        if (dvb->input != in) {
                u32 bit = (1ULL << input->nr);
                u32 obit =
                        dev->link[port->lnr].lnb.voltage[dvb->input & 3] & bit;

                dev->link[port->lnr].lnb.voltage[dvb->input & 3] &= ~bit;
                dvb->input = in;
                dev->link[port->lnr].lnb.voltage[dvb->input & 3] |= obit;
        }
        res = dvb->set_input(fe, in);
        return res;
}

static int max_set_tone(struct dvb_frontend *fe, enum fe_sec_tone_mode tone)
{
        struct ddb_input *input = fe->sec_priv;
        struct ddb_port *port = input->port;
        struct ddb *dev = port->dev;
        struct ddb_dvb *dvb = &port->dvb[input->nr & 1];
        int tuner = 0;
        int res = 0;
        u32 fmode = dev->link[port->lnr].lnb.fmode;

        mutex_lock(&dev->link[port->lnr].lnb.lock);
        dvb->tone = tone;
        switch (fmode) {
        default:
        case 0:
        case 3:
                res = lnb_set_tone(dev, port->lnr, dvb->input, tone);
                break;
        case 1:
        case 2:
                if (old_quattro) {
                        if (dvb->tone == SEC_TONE_ON)
                                tuner |= 2;
                        if (dvb->voltage == SEC_VOLTAGE_18)
                                tuner |= 1;
                } else {
                        if (dvb->tone == SEC_TONE_ON)
                                tuner |= 1;
                        if (dvb->voltage == SEC_VOLTAGE_18)
                                tuner |= 2;
                }
                res = max_set_input_unlocked(fe, tuner);
                break;
        }
        mutex_unlock(&dev->link[port->lnr].lnb.lock);
        return res;
}

static int max_set_voltage(struct dvb_frontend *fe, enum fe_sec_voltage voltage)
{
        struct ddb_input *input = fe->sec_priv;
        struct ddb_port *port = input->port;
        struct ddb *dev = port->dev;
        struct ddb_dvb *dvb = &port->dvb[input->nr & 1];
        int tuner = 0;
        u32 nv, ov = dev->link[port->lnr].lnb.voltages;
        int res = 0;
        u32 fmode = dev->link[port->lnr].lnb.fmode;

        mutex_lock(&dev->link[port->lnr].lnb.lock);
        dvb->voltage = voltage;

        switch (fmode) {
        case 3:
        default:
        case 0:
                if (fmode == 3)
                        max_set_input_unlocked(fe, 0);
                if (voltage == SEC_VOLTAGE_OFF)
                        dev->link[port->lnr].lnb.voltage[dvb->input] &=
                                ~(1ULL << input->nr);
                else
                        dev->link[port->lnr].lnb.voltage[dvb->input] |=
                                (1ULL << input->nr);

                res = lnb_set_voltage(dev, port->lnr, dvb->input, voltage);
                break;
        case 1:
        case 2:
                if (voltage == SEC_VOLTAGE_OFF)
                        dev->link[port->lnr].lnb.voltages &=
                                ~(1ULL << input->nr);
                else
                        dev->link[port->lnr].lnb.voltages |=
                                (1ULL << input->nr);

                nv = dev->link[port->lnr].lnb.voltages;

                if (old_quattro) {
                        if (dvb->tone == SEC_TONE_ON)
                                tuner |= 2;
                        if (dvb->voltage == SEC_VOLTAGE_18)
                                tuner |= 1;
                } else {
                        if (dvb->tone == SEC_TONE_ON)
                                tuner |= 1;
                        if (dvb->voltage == SEC_VOLTAGE_18)
                                tuner |= 2;
                }
                res = max_set_input_unlocked(fe, tuner);

                if (nv != ov) {
                        if (nv) {
                                lnb_set_voltage(
                                        dev, port->lnr,
                                        0, SEC_VOLTAGE_13);
                                if (fmode == 1) {
                                        lnb_set_voltage(
                                                dev, port->lnr,
                                                0, SEC_VOLTAGE_13);
                                        if (old_quattro) {
                                                lnb_set_voltage(
                                                        dev, port->lnr,
                                                        1, SEC_VOLTAGE_18);
                                                lnb_set_voltage(
                                                        dev, port->lnr,
                                                        2, SEC_VOLTAGE_13);
                                        } else {
                                                lnb_set_voltage(
                                                        dev, port->lnr,
                                                        1, SEC_VOLTAGE_13);
                                                lnb_set_voltage(
                                                        dev, port->lnr,
                                                        2, SEC_VOLTAGE_18);
                                        }
                                        lnb_set_voltage(
                                                dev, port->lnr,
                                                3, SEC_VOLTAGE_18);
                                }
                        } else {
                                lnb_set_voltage(
                                        dev, port->lnr,
                                        0, SEC_VOLTAGE_OFF);
                                if (fmode == 1) {
                                        lnb_set_voltage(
                                                dev, port->lnr,
                                                1, SEC_VOLTAGE_OFF);
                                        lnb_set_voltage(
                                                dev, port->lnr,
                                                2, SEC_VOLTAGE_OFF);
                                        lnb_set_voltage(
                                                dev, port->lnr,
                                                3, SEC_VOLTAGE_OFF);
                                }
                        }
                }
                break;
        }
        mutex_unlock(&dev->link[port->lnr].lnb.lock);
        return res;
}

static int max_enable_high_lnb_voltage(struct dvb_frontend *fe, long arg)
{
        return 0;
}

static int max_send_burst(struct dvb_frontend *fe, enum fe_sec_mini_cmd burst)
{
        return 0;
}

static int mxl_fw_read(void *priv, u8 *buf, u32 len)
{
        struct ddb_link *link = priv;
        struct ddb *dev = link->dev;

        dev_info(dev->dev, "Read mxl_fw from link %u\n", link->nr);

        return ddbridge_flashread(dev, link->nr, buf, 0xc0000, len);
}

int ddb_lnb_init_fmode(struct ddb *dev, struct ddb_link *link, u32 fm)
{
        u32 l = link->nr;

        if (link->lnb.fmode == fm)
                return 0;
        dev_info(dev->dev, "Set fmode link %u = %u\n", l, fm);
        mutex_lock(&link->lnb.lock);
        if (fm == 2 || fm == 1) {
                if (fmode_sat >= 0) {
                        lnb_set_sat(dev, l, 0, fmode_sat, 0, 0);
                        if (old_quattro) {
                                lnb_set_sat(dev, l, 1, fmode_sat, 0, 1);
                                lnb_set_sat(dev, l, 2, fmode_sat, 1, 0);
                        } else {
                                lnb_set_sat(dev, l, 1, fmode_sat, 1, 0);
                                lnb_set_sat(dev, l, 2, fmode_sat, 0, 1);
                        }
                        lnb_set_sat(dev, l, 3, fmode_sat, 1, 1);
                }
                lnb_set_tone(dev, l, 0, SEC_TONE_OFF);
                if (old_quattro) {
                        lnb_set_tone(dev, l, 1, SEC_TONE_OFF);
                        lnb_set_tone(dev, l, 2, SEC_TONE_ON);
                } else {
                        lnb_set_tone(dev, l, 1, SEC_TONE_ON);
                        lnb_set_tone(dev, l, 2, SEC_TONE_OFF);
                }
                lnb_set_tone(dev, l, 3, SEC_TONE_ON);
        }
        link->lnb.fmode = fm;
        mutex_unlock(&link->lnb.lock);
        return 0;
}

static struct mxl5xx_cfg mxl5xx = {
        .adr      = 0x60,
        .type     = 0x01,
        .clk      = 27000000,
        .ts_clk   = 139,
        .cap      = 12,
        .fw_read  = mxl_fw_read,
};

int ddb_fe_attach_mxl5xx(struct ddb_input *input)
{
        struct ddb *dev = input->port->dev;
        struct i2c_adapter *i2c = &input->port->i2c->adap;
        struct ddb_dvb *dvb = &input->port->dvb[input->nr & 1];
        struct ddb_port *port = input->port;
        struct ddb_link *link = &dev->link[port->lnr];
        struct mxl5xx_cfg cfg;
        int demod, tuner;

        cfg = mxl5xx;
        cfg.fw_priv = link;
        dvb->set_input = NULL;

        demod = input->nr;
        tuner = demod & 3;
        if (fmode == 3)
                tuner = 0;

        dvb->fe = dvb_attach(mxl5xx_attach, i2c, &cfg,
                             demod, tuner, &dvb->set_input);

        if (!dvb->fe) {
                dev_err(dev->dev, "No MXL5XX found!\n");
                return -ENODEV;
        }

        if (!dvb->set_input) {
                dev_err(dev->dev, "No mxl5xx_set_input function pointer!\n");
                return -ENODEV;
        }

        if (input->nr < 4) {
                lnb_command(dev, port->lnr, input->nr, LNB_CMD_INIT);
                lnb_set_voltage(dev, port->lnr, input->nr, SEC_VOLTAGE_OFF);
        }
        ddb_lnb_init_fmode(dev, link, fmode);

        dvb->fe->ops.set_voltage = max_set_voltage;
        dvb->fe->ops.enable_high_lnb_voltage = max_enable_high_lnb_voltage;
        dvb->fe->ops.set_tone = max_set_tone;
        dvb->diseqc_send_master_cmd = dvb->fe->ops.diseqc_send_master_cmd;
        dvb->fe->ops.diseqc_send_master_cmd = max_send_master_cmd;
        dvb->fe->ops.diseqc_send_burst = max_send_burst;
        dvb->fe->sec_priv = input;
        dvb->input = tuner;
        return 0;
}

/******************************************************************************/
/* MAX MCI related functions */

int ddb_fe_attach_mci(struct ddb_input *input, u32 type)
{
        struct ddb *dev = input->port->dev;
        struct ddb_dvb *dvb = &input->port->dvb[input->nr & 1];
        struct ddb_port *port = input->port;
        struct ddb_link *link = &dev->link[port->lnr];
        int demod, tuner;
        struct mci_cfg cfg;

        demod = input->nr;
        tuner = demod & 3;
        switch (type) {
        case DDB_TUNER_MCI_SX8:
                cfg = ddb_max_sx8_cfg;
                if (fmode == 3)
                        tuner = 0;
                break;
        default:
                return -EINVAL;
        }
        dvb->fe = ddb_mci_attach(input, &cfg, demod, &dvb->set_input);
        if (!dvb->fe) {
                dev_err(dev->dev, "No MCI card found!\n");
                return -ENODEV;
        }
        if (!dvb->set_input) {
                dev_err(dev->dev, "No MCI set_input function pointer!\n");
                return -ENODEV;
        }
        if (input->nr < 4) {
                lnb_command(dev, port->lnr, input->nr, LNB_CMD_INIT);
                lnb_set_voltage(dev, port->lnr, input->nr, SEC_VOLTAGE_OFF);
        }
        ddb_lnb_init_fmode(dev, link, fmode);

        dvb->fe->ops.set_voltage = max_set_voltage;
        dvb->fe->ops.enable_high_lnb_voltage = max_enable_high_lnb_voltage;
        dvb->fe->ops.set_tone = max_set_tone;
        dvb->diseqc_send_master_cmd = dvb->fe->ops.diseqc_send_master_cmd;
        dvb->fe->ops.diseqc_send_master_cmd = max_send_master_cmd;
        dvb->fe->ops.diseqc_send_burst = max_send_burst;
        dvb->fe->sec_priv = input;
        dvb->input = tuner;
        return 0;
}