ddbridge-core.c

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/*
 * ddbridge.c: Digital Devices PCIe bridge driver
 *
 * Copyright (C) 2010-2011 Digital Devices GmbH
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * version 2 only, as published by the Free Software Foundation.
 *
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
 * 02110-1301, USA
 * Or, point your browser to http://www.gnu.org/copyleft/gpl.html
 */

#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 "tda18271c2dd.h"
#include "stv6110x.h"
#include "stv090x.h"
#include "lnbh24.h"
#include "drxk.h"

DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);

/* MSI had problems with lost interrupts, fixed but needs testing */
#undef CONFIG_PCI_MSI

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

static int i2c_read(struct i2c_adapter *adapter, u8 adr, u8 *val)
{
    struct i2c_msg msgs[1] = {{.addr = adr,  .flags = I2C_M_RD,
                   .buf  = val,  .len   = 1 } };
    return (i2c_transfer(adapter, msgs, 1) == 1) ? 0 : -1;
}

static int i2c_read_reg(struct i2c_adapter *adapter, u8 adr, u8 reg, u8 *val)
{
    struct i2c_msg msgs[2] = {{.addr = adr,  .flags = 0,
                   .buf  = &reg, .len   = 1 },
                  {.addr = adr,  .flags = I2C_M_RD,
                   .buf  = val,  .len   = 1 } };
    return (i2c_transfer(adapter, msgs, 2) == 2) ? 0 : -1;
}

static int i2c_read_reg16(struct i2c_adapter *adapter, u8 adr,
              u16 reg, u8 *val)
{
    u8 msg[2] = {reg>>8, reg&0xff};
    struct i2c_msg msgs[2] = {{.addr = adr, .flags = 0,
                   .buf  = msg, .len   = 2},
                  {.addr = adr, .flags = I2C_M_RD,
                   .buf  = val, .len   = 1} };
    return (i2c_transfer(adapter, msgs, 2) == 2) ? 0 : -1;
}

static int ddb_i2c_cmd(struct ddb_i2c *i2c, u32 adr, u32 cmd)
{
    struct ddb *dev = i2c->dev;
    int stat;
    u32 val;

    i2c->done = 0;
    ddbwritel((adr << 9) | cmd, i2c->regs + I2C_COMMAND);
    stat = wait_event_timeout(i2c->wq, i2c->done == 1, HZ);
    if (stat <= 0) {
        printk(KERN_ERR "I2C timeout\n");
        { /* MSI debugging*/
            u32 istat = ddbreadl(INTERRUPT_STATUS);
            printk(KERN_ERR "IRS %08x\n", istat);
            ddbwritel(istat, INTERRUPT_ACK);
        }
        return -EIO;
    }
    val = ddbreadl(i2c->regs+I2C_COMMAND);
    if (val & 0x70000)
        return -EIO;
    return 0;
}

static int ddb_i2c_master_xfer(struct i2c_adapter *adapter,
                   struct i2c_msg msg[], int num)
{
    struct ddb_i2c *i2c = (struct ddb_i2c *)i2c_get_adapdata(adapter);
    struct ddb *dev = i2c->dev;
    u8 addr = 0;

    if (num)
        addr = msg[0].addr;

    if (num == 2 && msg[1].flags & I2C_M_RD &&
        !(msg[0].flags & I2C_M_RD)) {
        memcpy_toio(dev->regs + I2C_TASKMEM_BASE + i2c->wbuf,
                msg[0].buf, msg[0].len);
        ddbwritel(msg[0].len|(msg[1].len << 16),
              i2c->regs+I2C_TASKLENGTH);
        if (!ddb_i2c_cmd(i2c, addr, 1)) {
            memcpy_fromio(msg[1].buf,
                      dev->regs + I2C_TASKMEM_BASE + i2c->rbuf,
                      msg[1].len);
            return num;
        }
    }

    if (num == 1 && !(msg[0].flags & I2C_M_RD)) {
        ddbcpyto(I2C_TASKMEM_BASE + i2c->wbuf, msg[0].buf, msg[0].len);
        ddbwritel(msg[0].len, i2c->regs + I2C_TASKLENGTH);
        if (!ddb_i2c_cmd(i2c, addr, 2))
            return num;
    }
    if (num == 1 && (msg[0].flags & I2C_M_RD)) {
        ddbwritel(msg[0].len << 16, i2c->regs + I2C_TASKLENGTH);
        if (!ddb_i2c_cmd(i2c, addr, 3)) {
            ddbcpyfrom(msg[0].buf,
                   I2C_TASKMEM_BASE + i2c->rbuf, msg[0].len);
            return num;
        }
    }
    return -EIO;
}


static u32 ddb_i2c_functionality(struct i2c_adapter *adap)
{
    return I2C_FUNC_SMBUS_EMUL;
}

struct i2c_algorithm ddb_i2c_algo = {
    .master_xfer   = ddb_i2c_master_xfer,
    .functionality = ddb_i2c_functionality,
};

static void ddb_i2c_release(struct ddb *dev)
{
    int i;
    struct ddb_i2c *i2c;
    struct i2c_adapter *adap;

    for (i = 0; i < dev->info->port_num; i++) {
        i2c = &dev->i2c[i];
        adap = &i2c->adap;
        i2c_del_adapter(adap);
    }
}

static int ddb_i2c_init(struct ddb *dev)
{
    int i, j, stat = 0;
    struct ddb_i2c *i2c;
    struct i2c_adapter *adap;

    for (i = 0; i < dev->info->port_num; i++) {
        i2c = &dev->i2c[i];
        i2c->dev = dev;
        i2c->nr = i;
        i2c->wbuf = i * (I2C_TASKMEM_SIZE / 4);
        i2c->rbuf = i2c->wbuf + (I2C_TASKMEM_SIZE / 8);
        i2c->regs = 0x80 + i * 0x20;
        ddbwritel(I2C_SPEED_100, i2c->regs + I2C_TIMING);
        ddbwritel((i2c->rbuf << 16) | i2c->wbuf,
              i2c->regs + I2C_TASKADDRESS);
        init_waitqueue_head(&i2c->wq);

        adap = &i2c->adap;
        i2c_set_adapdata(adap, i2c);
#ifdef I2C_ADAP_CLASS_TV_DIGITAL
        adap->class = I2C_ADAP_CLASS_TV_DIGITAL|I2C_CLASS_TV_ANALOG;
#else
#ifdef I2C_CLASS_TV_ANALOG
        adap->class = I2C_CLASS_TV_ANALOG;
#endif
#endif
        strcpy(adap->name, "ddbridge");
        adap->algo = &ddb_i2c_algo;
        adap->algo_data = (void *)i2c;
        adap->dev.parent = &dev->pdev->dev;
        stat = i2c_add_adapter(adap);
        if (stat)
            break;
    }
    if (stat)
        for (j = 0; j < i; j++) {
            i2c = &dev->i2c[j];
            adap = &i2c->adap;
            i2c_del_adapter(adap);
        }
    return stat;
}


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

#if 0
static void set_table(struct ddb *dev, u32 off,
              dma_addr_t *pbuf, u32 num)
{
    u32 i, base;
    u64 mem;

    base = DMA_BASE_ADDRESS_TABLE + off;
    for (i = 0; i < num; i++) {
        mem = pbuf[i];
        ddbwritel(mem & 0xffffffff, base + i * 8);
        ddbwritel(mem >> 32, base + i * 8 + 4);
    }
}
#endif

static void ddb_address_table(struct ddb *dev)
{
    u32 i, j, base;
    u64 mem;
    dma_addr_t *pbuf;

    for (i = 0; i < dev->info->port_num * 2; i++) {
        base = DMA_BASE_ADDRESS_TABLE + i * 0x100;
        pbuf = dev->input[i].pbuf;
        for (j = 0; j < dev->input[i].dma_buf_num; j++) {
            mem = pbuf[j];
            ddbwritel(mem & 0xffffffff, base + j * 8);
            ddbwritel(mem >> 32, base + j * 8 + 4);
        }
    }
    for (i = 0; i < dev->info->port_num; i++) {
        base = DMA_BASE_ADDRESS_TABLE + 0x800 + i * 0x100;
        pbuf = dev->output[i].pbuf;
        for (j = 0; j < dev->output[i].dma_buf_num; j++) {
            mem = pbuf[j];
            ddbwritel(mem & 0xffffffff, base + j * 8);
            ddbwritel(mem >> 32, base + j * 8 + 4);
        }
    }
}

static void io_free(struct pci_dev *pdev, u8 **vbuf,
            dma_addr_t *pbuf, u32 size, int num)
{
    int i;

    for (i = 0; i < num; i++) {
        if (vbuf[i]) {
            pci_free_consistent(pdev, size, vbuf[i], pbuf[i]);
            vbuf[i] = 0;
        }
    }
}

static int io_alloc(struct pci_dev *pdev, u8 **vbuf,
            dma_addr_t *pbuf, u32 size, int num)
{
    int i;

    for (i = 0; i < num; i++) {
        vbuf[i] = pci_alloc_consistent(pdev, size, &pbuf[i]);
        if (!vbuf[i])
            return -ENOMEM;
    }
    return 0;
}

static int ddb_buffers_alloc(struct ddb *dev)
{
    int i;
    struct ddb_port *port;

    for (i = 0; i < dev->info->port_num; i++) {
        port = &dev->port[i];
        switch (port->class) {
        case DDB_PORT_TUNER:
            if (io_alloc(dev->pdev, port->input[0]->vbuf,
                     port->input[0]->pbuf,
                     port->input[0]->dma_buf_size,
                     port->input[0]->dma_buf_num) < 0)
                return -1;
            if (io_alloc(dev->pdev, port->input[1]->vbuf,
                     port->input[1]->pbuf,
                     port->input[1]->dma_buf_size,
                     port->input[1]->dma_buf_num) < 0)
                return -1;
            break;
        case DDB_PORT_CI:
            if (io_alloc(dev->pdev, port->input[0]->vbuf,
                     port->input[0]->pbuf,
                     port->input[0]->dma_buf_size,
                     port->input[0]->dma_buf_num) < 0)
                return -1;
            if (io_alloc(dev->pdev, port->output->vbuf,
                     port->output->pbuf,
                     port->output->dma_buf_size,
                     port->output->dma_buf_num) < 0)
                return -1;
            break;
        default:
            break;
        }
    }
    ddb_address_table(dev);
    return 0;
}

static void ddb_buffers_free(struct ddb *dev)
{
    int i;
    struct ddb_port *port;

    for (i = 0; i < dev->info->port_num; i++) {
        port = &dev->port[i];
        io_free(dev->pdev, port->input[0]->vbuf,
            port->input[0]->pbuf,
            port->input[0]->dma_buf_size,
            port->input[0]->dma_buf_num);
        io_free(dev->pdev, port->input[1]->vbuf,
            port->input[1]->pbuf,
            port->input[1]->dma_buf_size,
            port->input[1]->dma_buf_num);
        io_free(dev->pdev, port->output->vbuf,
            port->output->pbuf,
            port->output->dma_buf_size,
            port->output->dma_buf_num);
    }
}

static void ddb_input_start(struct ddb_input *input)
{
    struct ddb *dev = input->port->dev;

    spin_lock_irq(&input->lock);
    input->cbuf = 0;
    input->coff = 0;

    /* reset */
    ddbwritel(0, TS_INPUT_CONTROL(input->nr));
    ddbwritel(2, TS_INPUT_CONTROL(input->nr));
    ddbwritel(0, TS_INPUT_CONTROL(input->nr));

    ddbwritel((1 << 16) |
          (input->dma_buf_num << 11) |
          (input->dma_buf_size >> 7),
          DMA_BUFFER_SIZE(input->nr));
    ddbwritel(0, DMA_BUFFER_ACK(input->nr));

    ddbwritel(1, DMA_BASE_WRITE);
    ddbwritel(3, DMA_BUFFER_CONTROL(input->nr));
    ddbwritel(9, TS_INPUT_CONTROL(input->nr));
    input->running = 1;
    spin_unlock_irq(&input->lock);
}

static void ddb_input_stop(struct ddb_input *input)
{
    struct ddb *dev = input->port->dev;

    spin_lock_irq(&input->lock);
    ddbwritel(0, TS_INPUT_CONTROL(input->nr));
    ddbwritel(0, DMA_BUFFER_CONTROL(input->nr));
    input->running = 0;
    spin_unlock_irq(&input->lock);
}

static void ddb_output_start(struct ddb_output *output)
{
    struct ddb *dev = output->port->dev;

    spin_lock_irq(&output->lock);
    output->cbuf = 0;
    output->coff = 0;
    ddbwritel(0, TS_OUTPUT_CONTROL(output->nr));
    ddbwritel(2, TS_OUTPUT_CONTROL(output->nr));
    ddbwritel(0, TS_OUTPUT_CONTROL(output->nr));
    ddbwritel(0x3c, TS_OUTPUT_CONTROL(output->nr));
    ddbwritel((1 << 16) |
          (output->dma_buf_num << 11) |
          (output->dma_buf_size >> 7),
          DMA_BUFFER_SIZE(output->nr + 8));
    ddbwritel(0, DMA_BUFFER_ACK(output->nr + 8));

    ddbwritel(1, DMA_BASE_READ);
    ddbwritel(3, DMA_BUFFER_CONTROL(output->nr + 8));
    /* ddbwritel(0xbd, TS_OUTPUT_CONTROL(output->nr)); */
    ddbwritel(0x1d, TS_OUTPUT_CONTROL(output->nr));
    output->running = 1;
    spin_unlock_irq(&output->lock);
}

static void ddb_output_stop(struct ddb_output *output)
{
    struct ddb *dev = output->port->dev;

    spin_lock_irq(&output->lock);
    ddbwritel(0, TS_OUTPUT_CONTROL(output->nr));
    ddbwritel(0, DMA_BUFFER_CONTROL(output->nr + 8));
    output->running = 0;
    spin_unlock_irq(&output->lock);
}

static u32 ddb_output_free(struct ddb_output *output)
{
    u32 idx, off, stat = output->stat;
    s32 diff;

    idx = (stat >> 11) & 0x1f;
    off = (stat & 0x7ff) << 7;

    if (output->cbuf != idx) {
        if ((((output->cbuf + 1) % output->dma_buf_num) == idx) &&
            (output->dma_buf_size - output->coff <= 188))
            return 0;
        return 188;
    }
    diff = off - output->coff;
    if (diff <= 0 || diff > 188)
        return 188;
    return 0;
}

static ssize_t ddb_output_write(struct ddb_output *output,
                const u8 *buf, size_t count)
{
    struct ddb *dev = output->port->dev;
    u32 idx, off, stat = output->stat;
    u32 left = count, len;

    idx = (stat >> 11) & 0x1f;
    off = (stat & 0x7ff) << 7;

    while (left) {
        len = output->dma_buf_size - output->coff;
        if ((((output->cbuf + 1) % output->dma_buf_num) == idx) &&
            (off == 0)) {
            if (len <= 188)
                break;
            len -= 188;
        }
        if (output->cbuf == idx) {
            if (off > output->coff) {
#if 1
                len = off - output->coff;
                len -= (len % 188);
                if (len <= 188)

#endif
                    break;
                len -= 188;
            }
        }
        if (len > left)
            len = left;
        if (copy_from_user(output->vbuf[output->cbuf] + output->coff,
                   buf, len))
            return -EIO;
        left -= len;
        buf += len;
        output->coff += len;
        if (output->coff == output->dma_buf_size) {
            output->coff = 0;
            output->cbuf = ((output->cbuf + 1) % output->dma_buf_num);
        }
        ddbwritel((output->cbuf << 11) | (output->coff >> 7),
              DMA_BUFFER_ACK(output->nr + 8));
    }
    return count - left;
}

static u32 ddb_input_avail(struct ddb_input *input)
{
    struct ddb *dev = input->port->dev;
    u32 idx, off, stat = input->stat;
    u32 ctrl = ddbreadl(DMA_BUFFER_CONTROL(input->nr));

    idx = (stat >> 11) & 0x1f;
    off = (stat & 0x7ff) << 7;

    if (ctrl & 4) {
        printk(KERN_ERR "IA %d %d %08x\n", idx, off, ctrl);
        ddbwritel(input->stat, DMA_BUFFER_ACK(input->nr));
        return 0;
    }
    if (input->cbuf != idx)
        return 188;
    return 0;
}

static ssize_t ddb_input_read(struct ddb_input *input, u8 *buf, size_t count)
{
    struct ddb *dev = input->port->dev;
    u32 left = count;
    u32 idx, free, stat = input->stat;
    int ret;

    idx = (stat >> 11) & 0x1f;

    while (left) {
        if (input->cbuf == idx)
            return count - left;
        free = input->dma_buf_size - input->coff;
        if (free > left)
            free = left;
        ret = copy_to_user(buf, input->vbuf[input->cbuf] +
                   input->coff, free);
        if (ret)
            return -EFAULT;
        input->coff += free;
        if (input->coff == input->dma_buf_size) {
            input->coff = 0;
            input->cbuf = (input->cbuf+1) % input->dma_buf_num;
        }
        left -= free;
        ddbwritel((input->cbuf << 11) | (input->coff >> 7),
              DMA_BUFFER_ACK(input->nr));
    }
    return count;
}

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

#if 0
static struct ddb_input *fe2input(struct ddb *dev, struct dvb_frontend *fe)
{
    int i;

    for (i = 0; i < dev->info->port_num * 2; i++) {
        if (dev->input[i].fe == fe)
            return &dev->input[i];
    }
    return NULL;
}
#endif

static int drxk_gate_ctrl(struct dvb_frontend *fe, int enable)
{
    struct ddb_input *input = fe->sec_priv;
    struct ddb_port *port = input->port;
    int status;

    if (enable) {
        mutex_lock(&port->i2c_gate_lock);
        status = input->gate_ctrl(fe, 1);
    } else {
        status = input->gate_ctrl(fe, 0);
        mutex_unlock(&port->i2c_gate_lock);
    }
    return status;
}

static int demod_attach_drxk(struct ddb_input *input)
{
    struct i2c_adapter *i2c = &input->port->i2c->adap;
    struct dvb_frontend *fe;
    struct drxk_config config;

    memset(&config, 0, sizeof(config));
    config.microcode_name = "drxk_a3.mc";
    config.qam_demod_parameter_count = 4;
    config.adr = 0x29 + (input->nr & 1);

    fe = input->fe = dvb_attach(drxk_attach, &config, i2c);
    if (!input->fe) {
        printk(KERN_ERR "No DRXK found!\n");
        return -ENODEV;
    }
    fe->sec_priv = input;
    input->gate_ctrl = fe->ops.i2c_gate_ctrl;
    fe->ops.i2c_gate_ctrl = drxk_gate_ctrl;
    return 0;
}

static int tuner_attach_tda18271(struct ddb_input *input)
{
    struct i2c_adapter *i2c = &input->port->i2c->adap;
    struct dvb_frontend *fe;

    if (input->fe->ops.i2c_gate_ctrl)
        input->fe->ops.i2c_gate_ctrl(input->fe, 1);
    fe = dvb_attach(tda18271c2dd_attach, input->fe, i2c, 0x60);
    if (!fe) {
        printk(KERN_ERR "No TDA18271 found!\n");
        return -ENODEV;
    }
    if (input->fe->ops.i2c_gate_ctrl)
        input->fe->ops.i2c_gate_ctrl(input->fe, 0);
    return 0;
}

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

static struct stv090x_config stv0900 = {
    .device         = STV0900,
    .demod_mode     = STV090x_DUAL,
    .clk_mode       = STV090x_CLK_EXT,

    .xtal           = 27000000,
    .address        = 0x69,

    .ts1_mode       = STV090x_TSMODE_SERIAL_PUNCTURED,
    .ts2_mode       = STV090x_TSMODE_SERIAL_PUNCTURED,

    .repeater_level = STV090x_RPTLEVEL_16,

    .adc1_range = STV090x_ADC_1Vpp,
    .adc2_range = STV090x_ADC_1Vpp,

    .diseqc_envelope_mode = true,
};

static struct stv090x_config stv0900_aa = {
    .device         = STV0900,
    .demod_mode     = STV090x_DUAL,
    .clk_mode       = STV090x_CLK_EXT,

    .xtal           = 27000000,
    .address        = 0x68,

    .ts1_mode       = STV090x_TSMODE_SERIAL_PUNCTURED,
    .ts2_mode       = STV090x_TSMODE_SERIAL_PUNCTURED,

    .repeater_level = STV090x_RPTLEVEL_16,

    .adc1_range = STV090x_ADC_1Vpp,
    .adc2_range = STV090x_ADC_1Vpp,

    .diseqc_envelope_mode = true,
};

static struct stv6110x_config stv6110a = {
    .addr    = 0x60,
    .refclk  = 27000000,
    .clk_div = 1,
};

static struct stv6110x_config stv6110b = {
    .addr    = 0x63,
    .refclk  = 27000000,
    .clk_div = 1,
};

static int demod_attach_stv0900(struct ddb_input *input, int type)
{
    struct i2c_adapter *i2c = &input->port->i2c->adap;
    struct stv090x_config *feconf = type ? &stv0900_aa : &stv0900;

    input->fe = dvb_attach(stv090x_attach, feconf, i2c,
                   (input->nr & 1) ? STV090x_DEMODULATOR_1
                   : STV090x_DEMODULATOR_0);
    if (!input->fe) {
        printk(KERN_ERR "No STV0900 found!\n");
        return -ENODEV;
    }
    if (!dvb_attach(lnbh24_attach, input->fe, i2c, 0,
            0, (input->nr & 1) ?
            (0x09 - type) : (0x0b - type))) {
        printk(KERN_ERR "No LNBH24 found!\n");
        return -ENODEV;
    }
    return 0;
}

static int tuner_attach_stv6110(struct ddb_input *input, int type)
{
    struct i2c_adapter *i2c = &input->port->i2c->adap;
    struct stv090x_config *feconf = type ? &stv0900_aa : &stv0900;
    struct stv6110x_config *tunerconf = (input->nr & 1) ?
        &stv6110b : &stv6110a;
    struct stv6110x_devctl *ctl;

    ctl = dvb_attach(stv6110x_attach, input->fe, tunerconf, i2c);
    if (!ctl) {
        printk(KERN_ERR "No STV6110X found!\n");
        return -ENODEV;
    }
    printk(KERN_INFO "attach tuner input %d adr %02x\n",
             input->nr, tunerconf->addr);

    feconf->tuner_init          = ctl->tuner_init;
    feconf->tuner_sleep         = ctl->tuner_sleep;
    feconf->tuner_set_mode      = ctl->tuner_set_mode;
    feconf->tuner_set_frequency = ctl->tuner_set_frequency;
    feconf->tuner_get_frequency = ctl->tuner_get_frequency;
    feconf->tuner_set_bandwidth = ctl->tuner_set_bandwidth;
    feconf->tuner_get_bandwidth = ctl->tuner_get_bandwidth;
    feconf->tuner_set_bbgain    = ctl->tuner_set_bbgain;
    feconf->tuner_get_bbgain    = ctl->tuner_get_bbgain;
    feconf->tuner_set_refclk    = ctl->tuner_set_refclk;
    feconf->tuner_get_status    = ctl->tuner_get_status;

    return 0;
}

static int my_dvb_dmx_ts_card_init(struct dvb_demux *dvbdemux, char *id,
                int (*start_feed)(struct dvb_demux_feed *),
                int (*stop_feed)(struct dvb_demux_feed *),
                void *priv)
{
    dvbdemux->priv = priv;

    dvbdemux->filternum = 256;
    dvbdemux->feednum = 256;
    dvbdemux->start_feed = start_feed;
    dvbdemux->stop_feed = stop_feed;
    dvbdemux->write_to_decoder = NULL;
    dvbdemux->dmx.capabilities = (DMX_TS_FILTERING |
                      DMX_SECTION_FILTERING |
                      DMX_MEMORY_BASED_FILTERING);
    return dvb_dmx_init(dvbdemux);
}

static int my_dvb_dmxdev_ts_card_init(struct dmxdev *dmxdev,
                   struct dvb_demux *dvbdemux,
                   struct dmx_frontend *hw_frontend,
                   struct dmx_frontend *mem_frontend,
                   struct dvb_adapter *dvb_adapter)
{
    int ret;

    dmxdev->filternum = 256;
    dmxdev->demux = &dvbdemux->dmx;
    dmxdev->capabilities = 0;
    ret = dvb_dmxdev_init(dmxdev, dvb_adapter);
    if (ret < 0)
        return ret;

    hw_frontend->source = DMX_FRONTEND_0;
    dvbdemux->dmx.add_frontend(&dvbdemux->dmx, hw_frontend);
    mem_frontend->source = DMX_MEMORY_FE;
    dvbdemux->dmx.add_frontend(&dvbdemux->dmx, mem_frontend);
    return dvbdemux->dmx.connect_frontend(&dvbdemux->dmx, hw_frontend);
}

static int start_feed(struct dvb_demux_feed *dvbdmxfeed)
{
    struct dvb_demux *dvbdmx = dvbdmxfeed->demux;
    struct ddb_input *input = dvbdmx->priv;

    if (!input->users)
        ddb_input_start(input);

    return ++input->users;
}

static int stop_feed(struct dvb_demux_feed *dvbdmxfeed)
{
    struct dvb_demux *dvbdmx = dvbdmxfeed->demux;
    struct ddb_input *input = dvbdmx->priv;

    if (--input->users)
        return input->users;

    ddb_input_stop(input);
    return 0;
}


static void dvb_input_detach(struct ddb_input *input)
{
    struct dvb_adapter *adap = &input->adap;
    struct dvb_demux *dvbdemux = &input->demux;

    switch (input->attached) {
    case 5:
        if (input->fe2)
            dvb_unregister_frontend(input->fe2);
        if (input->fe) {
            dvb_unregister_frontend(input->fe);
            dvb_frontend_detach(input->fe);
            input->fe = NULL;
        }
    case 4:
        dvb_net_release(&input->dvbnet);

    case 3:
        dvbdemux->dmx.close(&dvbdemux->dmx);
        dvbdemux->dmx.remove_frontend(&dvbdemux->dmx,
                          &input->hw_frontend);
        dvbdemux->dmx.remove_frontend(&dvbdemux->dmx,
                          &input->mem_frontend);
        dvb_dmxdev_release(&input->dmxdev);

    case 2:
        dvb_dmx_release(&input->demux);

    case 1:
        dvb_unregister_adapter(adap);
    }
    input->attached = 0;
}

static int dvb_input_attach(struct ddb_input *input)
{
    int ret;
    struct ddb_port *port = input->port;
    struct dvb_adapter *adap = &input->adap;
    struct dvb_demux *dvbdemux = &input->demux;

    ret = dvb_register_adapter(adap, "DDBridge", THIS_MODULE,
                   &input->port->dev->pdev->dev,
                   adapter_nr);
    if (ret < 0) {
        printk(KERN_ERR "ddbridge: Could not register adapter."
               "Check if you enabled enough adapters in dvb-core!\n");
        return ret;
    }
    input->attached = 1;

    ret = my_dvb_dmx_ts_card_init(dvbdemux, "SW demux",
                      start_feed,
                      stop_feed, input);
    if (ret < 0)
        return ret;
    input->attached = 2;

    ret = my_dvb_dmxdev_ts_card_init(&input->dmxdev, &input->demux,
                     &input->hw_frontend,
                     &input->mem_frontend, adap);
    if (ret < 0)
        return ret;
    input->attached = 3;

    ret = dvb_net_init(adap, &input->dvbnet, input->dmxdev.demux);
    if (ret < 0)
        return ret;
    input->attached = 4;

    input->fe = 0;
    switch (port->type) {
    case DDB_TUNER_DVBS_ST:
        if (demod_attach_stv0900(input, 0) < 0)
            return -ENODEV;
        if (tuner_attach_stv6110(input, 0) < 0)
            return -ENODEV;
        if (input->fe) {
            if (dvb_register_frontend(adap, input->fe) < 0)
                return -ENODEV;
        }
        break;
    case DDB_TUNER_DVBS_ST_AA:
        if (demod_attach_stv0900(input, 1) < 0)
            return -ENODEV;
        if (tuner_attach_stv6110(input, 1) < 0)
            return -ENODEV;
        if (input->fe) {
            if (dvb_register_frontend(adap, input->fe) < 0)
                return -ENODEV;
        }
        break;
    case DDB_TUNER_DVBCT_TR:
        if (demod_attach_drxk(input) < 0)
            return -ENODEV;
        if (tuner_attach_tda18271(input) < 0)
            return -ENODEV;
        if (input->fe) {
            if (dvb_register_frontend(adap, input->fe) < 0)
                return -ENODEV;
        }
        if (input->fe2) {
            if (dvb_register_frontend(adap, input->fe2) < 0)
                return -ENODEV;
            input->fe2->tuner_priv = input->fe->tuner_priv;
            memcpy(&input->fe2->ops.tuner_ops,
                   &input->fe->ops.tuner_ops,
                   sizeof(struct dvb_tuner_ops));
        }
        break;
    }
    input->attached = 5;
    return 0;
}

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

static ssize_t ts_write(struct file *file, const char *buf,
            size_t count, loff_t *ppos)
{
    struct dvb_device *dvbdev = file->private_data;
    struct ddb_output *output = dvbdev->priv;
    size_t left = count;
    int stat;

    while (left) {
        if (ddb_output_free(output) < 188) {
            if (file->f_flags & O_NONBLOCK)
                break;
            if (wait_event_interruptible(
                    output->wq, ddb_output_free(output) >= 188) < 0)
                break;
        }
        stat = ddb_output_write(output, buf, left);
        if (stat < 0)
            break;
        buf += stat;
        left -= stat;
    }
    return (left == count) ? -EAGAIN : (count - left);
}

static ssize_t ts_read(struct file *file, char *buf,
               size_t count, loff_t *ppos)
{
    struct dvb_device *dvbdev = file->private_data;
    struct ddb_output *output = dvbdev->priv;
    struct ddb_input *input = output->port->input[0];
    int left, read;

    count -= count % 188;
    left = count;
    while (left) {
        if (ddb_input_avail(input) < 188) {
            if (file->f_flags & O_NONBLOCK)
                break;
            if (wait_event_interruptible(
                    input->wq, ddb_input_avail(input) >= 188) < 0)
                break;
        }
        read = ddb_input_read(input, buf, left);
        if (read < 0)
            return read;
        left -= read;
        buf += read;
    }
    return (left == count) ? -EAGAIN : (count - left);
}

static unsigned int ts_poll(struct file *file, poll_table *wait)
{
    /*
    struct dvb_device *dvbdev = file->private_data;
    struct ddb_output *output = dvbdev->priv;
    struct ddb_input *input = output->port->input[0];
    */
    unsigned int mask = 0;

#if 0
    if (data_avail_to_read)
        mask |= POLLIN | POLLRDNORM;
    if (data_avail_to_write)
        mask |= POLLOUT | POLLWRNORM;

    poll_wait(file, &read_queue, wait);
    poll_wait(file, &write_queue, wait);
#endif
    return mask;
}

static const struct file_operations ci_fops = {
    .owner   = THIS_MODULE,
    .read    = ts_read,
    .write   = ts_write,
    .open    = dvb_generic_open,
    .release = dvb_generic_release,
    .poll    = ts_poll,
    .mmap    = 0,
};

static struct dvb_device dvbdev_ci = {
    .priv    = 0,
    .readers = -1,
    .writers = -1,
    .users   = -1,
    .fops    = &ci_fops,
};

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

static void input_tasklet(unsigned long data)
{
    struct ddb_input *input = (struct ddb_input *) data;
    struct ddb *dev = input->port->dev;

    spin_lock(&input->lock);
    if (!input->running) {
        spin_unlock(&input->lock);
        return;
    }
    input->stat = ddbreadl(DMA_BUFFER_CURRENT(input->nr));

    if (input->port->class == DDB_PORT_TUNER) {
        if (4&ddbreadl(DMA_BUFFER_CONTROL(input->nr)))
            printk(KERN_ERR "Overflow input %d\n", input->nr);
        while (input->cbuf != ((input->stat >> 11) & 0x1f)
               || (4&ddbreadl(DMA_BUFFER_CONTROL(input->nr)))) {
            dvb_dmx_swfilter_packets(&input->demux,
                         input->vbuf[input->cbuf],
                         input->dma_buf_size / 188);

            input->cbuf = (input->cbuf + 1) % input->dma_buf_num;
            ddbwritel((input->cbuf << 11),
                  DMA_BUFFER_ACK(input->nr));
            input->stat = ddbreadl(DMA_BUFFER_CURRENT(input->nr));
               }
    }
    if (input->port->class == DDB_PORT_CI)
        wake_up(&input->wq);
    spin_unlock(&input->lock);
}

static void output_tasklet(unsigned long data)
{
    struct ddb_output *output = (struct ddb_output *) data;
    struct ddb *dev = output->port->dev;

    spin_lock(&output->lock);
    if (!output->running) {
        spin_unlock(&output->lock);
        return;
    }
    output->stat = ddbreadl(DMA_BUFFER_CURRENT(output->nr + 8));
    wake_up(&output->wq);
    spin_unlock(&output->lock);
}


struct cxd2099_cfg cxd_cfg = {
    .bitrate =  62000,
    .adr     =  0x40,
    .polarity = 1,
    .clock_mode = 1,
};

static int ddb_ci_attach(struct ddb_port *port)
{
    int ret;

    ret = dvb_register_adapter(&port->output->adap,
                   "DDBridge",
                   THIS_MODULE,
                   &port->dev->pdev->dev,
                   adapter_nr);
    if (ret < 0)
        return ret;
    port->en = cxd2099_attach(&cxd_cfg, port, &port->i2c->adap);
    if (!port->en) {
        dvb_unregister_adapter(&port->output->adap);
        return -ENODEV;
    }
    ddb_input_start(port->input[0]);
    ddb_output_start(port->output);
    dvb_ca_en50221_init(&port->output->adap,
                port->en, 0, 1);
    ret = dvb_register_device(&port->output->adap, &port->output->dev,
                  &dvbdev_ci, (void *) port->output,
                  DVB_DEVICE_SEC);
    return ret;
}

static int ddb_port_attach(struct ddb_port *port)
{
    int ret = 0;

    switch (port->class) {
    case DDB_PORT_TUNER:
        ret = dvb_input_attach(port->input[0]);
        if (ret < 0)
            break;
        ret = dvb_input_attach(port->input[1]);
        break;
    case DDB_PORT_CI:
        ret = ddb_ci_attach(port);
        break;
    default:
        break;
    }
    if (ret < 0)
        printk(KERN_ERR "port_attach on port %d failed\n", port->nr);
    return ret;
}

static int ddb_ports_attach(struct ddb *dev)
{
    int i, ret = 0;
    struct ddb_port *port;

    for (i = 0; i < dev->info->port_num; i++) {
        port = &dev->port[i];
        ret = ddb_port_attach(port);
        if (ret < 0)
            break;
    }
    return ret;
}

static void ddb_ports_detach(struct ddb *dev)
{
    int i;
    struct ddb_port *port;

    for (i = 0; i < dev->info->port_num; i++) {
        port = &dev->port[i];
        switch (port->class) {
        case DDB_PORT_TUNER:
            dvb_input_detach(port->input[0]);
            dvb_input_detach(port->input[1]);
            break;
        case DDB_PORT_CI:
            if (port->output->dev)
                dvb_unregister_device(port->output->dev);
            if (port->en) {
                ddb_input_stop(port->input[0]);
                ddb_output_stop(port->output);
                dvb_ca_en50221_release(port->en);
                kfree(port->en);
                port->en = 0;
                dvb_unregister_adapter(&port->output->adap);
            }
            break;
        }
    }
}

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

static int port_has_ci(struct ddb_port *port)
{
    u8 val;
    return i2c_read_reg(&port->i2c->adap, 0x40, 0, &val) ? 0 : 1;
}

static int port_has_stv0900(struct ddb_port *port)
{
    u8 val;
    if (i2c_read_reg16(&port->i2c->adap, 0x69, 0xf100, &val) < 0)
        return 0;
    return 1;
}

static int port_has_stv0900_aa(struct ddb_port *port)
{
    u8 val;
    if (i2c_read_reg16(&port->i2c->adap, 0x68, 0xf100, &val) < 0)
        return 0;
    return 1;
}

static int port_has_drxks(struct ddb_port *port)
{
    u8 val;
    if (i2c_read(&port->i2c->adap, 0x29, &val) < 0)
        return 0;
    if (i2c_read(&port->i2c->adap, 0x2a, &val) < 0)
        return 0;
    return 1;
}

static void ddb_port_probe(struct ddb_port *port)
{
    struct ddb *dev = port->dev;
    char *modname = "NO MODULE";

    port->class = DDB_PORT_NONE;

    if (port_has_ci(port)) {
        modname = "CI";
        port->class = DDB_PORT_CI;
        ddbwritel(I2C_SPEED_400, port->i2c->regs + I2C_TIMING);
    } else if (port_has_stv0900(port)) {
        modname = "DUAL DVB-S2";
        port->class = DDB_PORT_TUNER;
        port->type = DDB_TUNER_DVBS_ST;
        ddbwritel(I2C_SPEED_100, port->i2c->regs + I2C_TIMING);
    } else if (port_has_stv0900_aa(port)) {
        modname = "DUAL DVB-S2";
        port->class = DDB_PORT_TUNER;
        port->type = DDB_TUNER_DVBS_ST_AA;
        ddbwritel(I2C_SPEED_100, port->i2c->regs + I2C_TIMING);
    } else if (port_has_drxks(port)) {
        modname = "DUAL DVB-C/T";
        port->class = DDB_PORT_TUNER;
        port->type = DDB_TUNER_DVBCT_TR;
        ddbwritel(I2C_SPEED_400, port->i2c->regs + I2C_TIMING);
    }
    printk(KERN_INFO "Port %d (TAB %d): %s\n",
             port->nr, port->nr+1, modname);
}

static void ddb_input_init(struct ddb_port *port, int nr)
{
    struct ddb *dev = port->dev;
    struct ddb_input *input = &dev->input[nr];

    input->nr = nr;
    input->port = port;
    input->dma_buf_num = INPUT_DMA_BUFS;
    input->dma_buf_size = INPUT_DMA_SIZE;
    ddbwritel(0, TS_INPUT_CONTROL(nr));
    ddbwritel(2, TS_INPUT_CONTROL(nr));
    ddbwritel(0, TS_INPUT_CONTROL(nr));
    ddbwritel(0, DMA_BUFFER_ACK(nr));
    tasklet_init(&input->tasklet, input_tasklet, (unsigned long) input);
    spin_lock_init(&input->lock);
    init_waitqueue_head(&input->wq);
}

static void ddb_output_init(struct ddb_port *port, int nr)
{
    struct ddb *dev = port->dev;
    struct ddb_output *output = &dev->output[nr];
    output->nr = nr;
    output->port = port;
    output->dma_buf_num = OUTPUT_DMA_BUFS;
    output->dma_buf_size = OUTPUT_DMA_SIZE;

    ddbwritel(0, TS_OUTPUT_CONTROL(nr));
    ddbwritel(2, TS_OUTPUT_CONTROL(nr));
    ddbwritel(0, TS_OUTPUT_CONTROL(nr));
    tasklet_init(&output->tasklet, output_tasklet, (unsigned long) output);
    init_waitqueue_head(&output->wq);
}

static void ddb_ports_init(struct ddb *dev)
{
    int i;
    struct ddb_port *port;

    for (i = 0; i < dev->info->port_num; i++) {
        port = &dev->port[i];
        port->dev = dev;
        port->nr = i;
        port->i2c = &dev->i2c[i];
        port->input[0] = &dev->input[2 * i];
        port->input[1] = &dev->input[2 * i + 1];
        port->output = &dev->output[i];

        mutex_init(&port->i2c_gate_lock);
        ddb_port_probe(port);
        ddb_input_init(port, 2 * i);
        ddb_input_init(port, 2 * i + 1);
        ddb_output_init(port, i);
    }
}

static void ddb_ports_release(struct ddb *dev)
{
    int i;
    struct ddb_port *port;

    for (i = 0; i < dev->info->port_num; i++) {
        port = &dev->port[i];
        port->dev = dev;
        tasklet_kill(&port->input[0]->tasklet);
        tasklet_kill(&port->input[1]->tasklet);
        tasklet_kill(&port->output->tasklet);
    }
}

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

static void irq_handle_i2c(struct ddb *dev, int n)
{
    struct ddb_i2c *i2c = &dev->i2c[n];

    i2c->done = 1;
    wake_up(&i2c->wq);
}

static irqreturn_t irq_handler(int irq, void *dev_id)
{
    struct ddb *dev = (struct ddb *) dev_id;
    u32 s = ddbreadl(INTERRUPT_STATUS);

    if (!s)
        return IRQ_NONE;

    do {
        ddbwritel(s, INTERRUPT_ACK);

        if (s & 0x00000001)
            irq_handle_i2c(dev, 0);
        if (s & 0x00000002)
            irq_handle_i2c(dev, 1);
        if (s & 0x00000004)
            irq_handle_i2c(dev, 2);
        if (s & 0x00000008)
            irq_handle_i2c(dev, 3);

        if (s & 0x00000100)
            tasklet_schedule(&dev->input[0].tasklet);
        if (s & 0x00000200)
            tasklet_schedule(&dev->input[1].tasklet);
        if (s & 0x00000400)
            tasklet_schedule(&dev->input[2].tasklet);
        if (s & 0x00000800)
            tasklet_schedule(&dev->input[3].tasklet);
        if (s & 0x00001000)
            tasklet_schedule(&dev->input[4].tasklet);
        if (s & 0x00002000)
            tasklet_schedule(&dev->input[5].tasklet);
        if (s & 0x00004000)
            tasklet_schedule(&dev->input[6].tasklet);
        if (s & 0x00008000)
            tasklet_schedule(&dev->input[7].tasklet);

        if (s & 0x00010000)
            tasklet_schedule(&dev->output[0].tasklet);
        if (s & 0x00020000)
            tasklet_schedule(&dev->output[1].tasklet);
        if (s & 0x00040000)
            tasklet_schedule(&dev->output[2].tasklet);
        if (s & 0x00080000)
            tasklet_schedule(&dev->output[3].tasklet);

        /* if (s & 0x000f0000)  printk(KERN_DEBUG "%08x\n", istat); */
    } while ((s = ddbreadl(INTERRUPT_STATUS)));

    return IRQ_HANDLED;
}

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

static int flashio(struct ddb *dev, u8 *wbuf, u32 wlen, u8 *rbuf, u32 rlen)
{
    u32 data, shift;

    if (wlen > 4)
        ddbwritel(1, SPI_CONTROL);
    while (wlen > 4) {
        /* FIXME: check for big-endian */
        data = swab32(*(u32 *)wbuf);
        wbuf += 4;
        wlen -= 4;
        ddbwritel(data, SPI_DATA);
        while (ddbreadl(SPI_CONTROL) & 0x0004)
            ;
    }

    if (rlen)
        ddbwritel(0x0001 | ((wlen << (8 + 3)) & 0x1f00), SPI_CONTROL);
    else
        ddbwritel(0x0003 | ((wlen << (8 + 3)) & 0x1f00), SPI_CONTROL);

    data = 0;
    shift = ((4 - wlen) * 8);
    while (wlen) {
        data <<= 8;
        data |= *wbuf;
        wlen--;
        wbuf++;
    }
    if (shift)
        data <<= shift;
    ddbwritel(data, SPI_DATA);
    while (ddbreadl(SPI_CONTROL) & 0x0004)
        ;

    if (!rlen) {
        ddbwritel(0, SPI_CONTROL);
        return 0;
    }
    if (rlen > 4)
        ddbwritel(1, SPI_CONTROL);

    while (rlen > 4) {
        ddbwritel(0xffffffff, SPI_DATA);
        while (ddbreadl(SPI_CONTROL) & 0x0004)
            ;
        data = ddbreadl(SPI_DATA);
        *(u32 *) rbuf = swab32(data);
        rbuf += 4;
        rlen -= 4;
    }
    ddbwritel(0x0003 | ((rlen << (8 + 3)) & 0x1F00), SPI_CONTROL);
    ddbwritel(0xffffffff, SPI_DATA);
    while (ddbreadl(SPI_CONTROL) & 0x0004)
        ;

    data = ddbreadl(SPI_DATA);
    ddbwritel(0, SPI_CONTROL);

    if (rlen < 4)
        data <<= ((4 - rlen) * 8);

    while (rlen > 0) {
        *rbuf = ((data >> 24) & 0xff);
        data <<= 8;
        rbuf++;
        rlen--;
    }
    return 0;
}

#define DDB_MAGIC 'd'

struct ddb_flashio {
    __u8 *write_buf;
    __u32 write_len;
    __u8 *read_buf;
    __u32 read_len;
};

#define IOCTL_DDB_FLASHIO  _IOWR(DDB_MAGIC, 0x00, struct ddb_flashio)

#define DDB_NAME "ddbridge"

static u32 ddb_num;
static struct ddb *ddbs[32];
static struct class *ddb_class;
static int ddb_major;

static int ddb_open(struct inode *inode, struct file *file)
{
    struct ddb *dev = ddbs[iminor(inode)];

    file->private_data = dev;
    return 0;
}

static long ddb_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
{
    struct ddb *dev = file->private_data;
    void *parg = (void *)arg;
    int res;

    switch (cmd) {
    case IOCTL_DDB_FLASHIO:
    {
        struct ddb_flashio fio;
        u8 *rbuf, *wbuf;

        if (copy_from_user(&fio, parg, sizeof(fio)))
            return -EFAULT;

        if (fio.write_len > 1028 || fio.read_len > 1028)
            return -EINVAL;
        if (fio.write_len + fio.read_len > 1028)
            return -EINVAL;

        wbuf = &dev->iobuf[0];
        rbuf = wbuf + fio.write_len;

        if (copy_from_user(wbuf, fio.write_buf, fio.write_len))
            return -EFAULT;
        res = flashio(dev, wbuf, fio.write_len, rbuf, fio.read_len);
        if (res)
            return res;
        if (copy_to_user(fio.read_buf, rbuf, fio.read_len))
            return -EFAULT;
        break;
    }
    default:
        return -ENOTTY;
    }
    return 0;
}

static const struct file_operations ddb_fops = {
    .unlocked_ioctl = ddb_ioctl,
    .open           = ddb_open,
};

static char *ddb_devnode(struct device *device, umode_t *mode)
{
    struct ddb *dev = dev_get_drvdata(device);

    return kasprintf(GFP_KERNEL, "ddbridge/card%d", dev->nr);
}

static int ddb_class_create(void)
{
    ddb_major = register_chrdev(0, DDB_NAME, &ddb_fops);
    if (ddb_major < 0)
        return ddb_major;

    ddb_class = class_create(THIS_MODULE, DDB_NAME);
    if (IS_ERR(ddb_class)) {
        unregister_chrdev(ddb_major, DDB_NAME);
        return PTR_ERR(ddb_class);
    }
    ddb_class->devnode = ddb_devnode;
    return 0;
}

static void ddb_class_destroy(void)
{
    class_destroy(ddb_class);
    unregister_chrdev(ddb_major, DDB_NAME);
}

static int ddb_device_create(struct ddb *dev)
{
    dev->nr = ddb_num++;
    dev->ddb_dev = device_create(ddb_class, NULL,
                     MKDEV(ddb_major, dev->nr),
                     dev, "ddbridge%d", dev->nr);
    ddbs[dev->nr] = dev;
    if (IS_ERR(dev->ddb_dev))
        return -1;
    return 0;
}

static void ddb_device_destroy(struct ddb *dev)
{
    ddb_num--;
    if (IS_ERR(dev->ddb_dev))
        return;
    device_destroy(ddb_class, MKDEV(ddb_major, 0));
}


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

static void ddb_unmap(struct ddb *dev)
{
    if (dev->regs)
        iounmap(dev->regs);
    vfree(dev);
}


static void __devexit ddb_remove(struct pci_dev *pdev)
{
    struct ddb *dev = (struct ddb *) pci_get_drvdata(pdev);

    ddb_ports_detach(dev);
    ddb_i2c_release(dev);

    ddbwritel(0, INTERRUPT_ENABLE);
    free_irq(dev->pdev->irq, dev);
#ifdef CONFIG_PCI_MSI
    if (dev->msi)
        pci_disable_msi(dev->pdev);
#endif
    ddb_ports_release(dev);
    ddb_buffers_free(dev);
    ddb_device_destroy(dev);

    ddb_unmap(dev);
    pci_set_drvdata(pdev, 0);
    pci_disable_device(pdev);
}


static int __devinit ddb_probe(struct pci_dev *pdev,
                   const struct pci_device_id *id)
{
    struct ddb *dev;
    int stat = 0;
    int irq_flag = IRQF_SHARED;

    if (pci_enable_device(pdev) < 0)
        return -ENODEV;

    dev = vmalloc(sizeof(struct ddb));
    if (dev == NULL)
        return -ENOMEM;
    memset(dev, 0, sizeof(struct ddb));

    dev->pdev = pdev;
    pci_set_drvdata(pdev, dev);
    dev->info = (struct ddb_info *) id->driver_data;
    printk(KERN_INFO "DDBridge driver detected: %s\n", dev->info->name);

    dev->regs = ioremap(pci_resource_start(dev->pdev, 0),
                pci_resource_len(dev->pdev, 0));
    if (!dev->regs) {
        stat = -ENOMEM;
        goto fail;
    }
    printk(KERN_INFO "HW %08x FW %08x\n", ddbreadl(0), ddbreadl(4));

#ifdef CONFIG_PCI_MSI
    if (pci_msi_enabled())
        stat = pci_enable_msi(dev->pdev);
    if (stat) {
        printk(KERN_INFO ": MSI not available.\n");
    } else {
        irq_flag = 0;
        dev->msi = 1;
    }
#endif
    stat = request_irq(dev->pdev->irq, irq_handler,
               irq_flag, "DDBridge", (void *) dev);
    if (stat < 0)
        goto fail1;
    ddbwritel(0, DMA_BASE_WRITE);
    ddbwritel(0, DMA_BASE_READ);
    ddbwritel(0xffffffff, INTERRUPT_ACK);
    ddbwritel(0xfff0f, INTERRUPT_ENABLE);
    ddbwritel(0, MSI1_ENABLE);

    if (ddb_i2c_init(dev) < 0)
        goto fail1;
    ddb_ports_init(dev);
    if (ddb_buffers_alloc(dev) < 0) {
        printk(KERN_INFO ": Could not allocate buffer memory\n");
        goto fail2;
    }
    if (ddb_ports_attach(dev) < 0)
        goto fail3;
    ddb_device_create(dev);
    return 0;

fail3:
    ddb_ports_detach(dev);
    printk(KERN_ERR "fail3\n");
    ddb_ports_release(dev);
fail2:
    printk(KERN_ERR "fail2\n");
    ddb_buffers_free(dev);
fail1:
    printk(KERN_ERR "fail1\n");
    if (dev->msi)
        pci_disable_msi(dev->pdev);
    free_irq(dev->pdev->irq, dev);
fail:
    printk(KERN_ERR "fail\n");
    ddb_unmap(dev);
    pci_set_drvdata(pdev, 0);
    pci_disable_device(pdev);
    return -1;
}

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

static struct ddb_info ddb_none = {
    .type     = DDB_NONE,
    .name     = "Digital Devices PCIe bridge",
};

static struct ddb_info ddb_octopus = {
    .type     = DDB_OCTOPUS,
    .name     = "Digital Devices Octopus DVB adapter",
    .port_num = 4,
};

static struct ddb_info ddb_octopus_le = {
    .type     = DDB_OCTOPUS,
    .name     = "Digital Devices Octopus LE DVB adapter",
    .port_num = 2,
};

static struct ddb_info ddb_v6 = {
    .type     = DDB_OCTOPUS,
    .name     = "Digital Devices Cine S2 V6 DVB adapter",
    .port_num = 3,
};

#define DDVID 0xdd01 /* Digital Devices Vendor ID */

#define DDB_ID(_vend, _dev, _subvend, _subdev, _driverdata) {   \
    .vendor      = _vend,    .device    = _dev, \
    .subvendor   = _subvend, .subdevice = _subdev, \
    .driver_data = (unsigned long)&_driverdata }

static const struct pci_device_id ddb_id_tbl[] __devinitdata = {
    DDB_ID(DDVID, 0x0002, DDVID, 0x0001, ddb_octopus),
    DDB_ID(DDVID, 0x0003, DDVID, 0x0001, ddb_octopus),
    DDB_ID(DDVID, 0x0003, DDVID, 0x0002, ddb_octopus_le),
    DDB_ID(DDVID, 0x0003, DDVID, 0x0010, ddb_octopus),
    DDB_ID(DDVID, 0x0003, DDVID, 0x0020, ddb_v6),
    /* in case sub-ids got deleted in flash */
    DDB_ID(DDVID, 0x0003, PCI_ANY_ID, PCI_ANY_ID, ddb_none),
    {0}
};
MODULE_DEVICE_TABLE(pci, ddb_id_tbl);


static struct pci_driver ddb_pci_driver = {
    .name        = "DDBridge",
    .id_table    = ddb_id_tbl,
    .probe       = ddb_probe,
    .remove      = __devexit_p(ddb_remove),
};

static __init int module_init_ddbridge(void)
{
    int ret;

    printk(KERN_INFO "Digital Devices PCIE bridge driver, "
           "Copyright (C) 2010-11 Digital Devices GmbH\n");

    ret = ddb_class_create();
    if (ret < 0)
        return ret;
    ret = pci_register_driver(&ddb_pci_driver);
    if (ret < 0)
        ddb_class_destroy();
    return ret;
}

static __exit void module_exit_ddbridge(void)
{
    pci_unregister_driver(&ddb_pci_driver);
    ddb_class_destroy();
}

module_init(module_init_ddbridge);
module_exit(module_exit_ddbridge);

MODULE_DESCRIPTION("Digital Devices PCIe Bridge");
MODULE_AUTHOR("Ralph Metzler");
MODULE_LICENSE("GPL");
MODULE_VERSION("0.5");