au0828-dvb.c

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/*
 *  Driver for the Auvitek USB bridge
 *
 *  Copyright (c) 2008 Steven Toth <[email protected]>
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  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., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

#include <linux/module.h>
#include <linux/slab.h>
#include <linux/init.h>
#include <linux/device.h>
#include <linux/suspend.h>
#include <media/v4l2-common.h>
#include <media/tuner.h>

#include "au0828.h"
#include "au8522.h"
#include "xc5000.h"
#include "mxl5007t.h"
#include "tda18271.h"

DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);

#define _AU0828_BULKPIPE 0x83
#define _BULKPIPESIZE 0xe522

static u8 hauppauge_hvr950q_led_states[] = {
    0x00, /* off */
    0x02, /* yellow */
    0x04, /* green */
};

static struct au8522_led_config hauppauge_hvr950q_led_cfg = {
    .gpio_output = 0x00e0,
    .gpio_output_enable  = 0x6006,
    .gpio_output_disable = 0x0660,

    .gpio_leds = 0x00e2,
    .led_states  = hauppauge_hvr950q_led_states,
    .num_led_states = sizeof(hauppauge_hvr950q_led_states),

    .vsb8_strong   = 20 /* dB */ * 10,
    .qam64_strong  = 25 /* dB */ * 10,
    .qam256_strong = 32 /* dB */ * 10,
};

static struct au8522_config hauppauge_hvr950q_config = {
    .demod_address = 0x8e >> 1,
    .status_mode   = AU8522_DEMODLOCKING,
    .qam_if        = AU8522_IF_6MHZ,
    .vsb_if        = AU8522_IF_6MHZ,
    .led_cfg       = &hauppauge_hvr950q_led_cfg,
};

static struct au8522_config fusionhdtv7usb_config = {
    .demod_address = 0x8e >> 1,
    .status_mode   = AU8522_DEMODLOCKING,
    .qam_if        = AU8522_IF_6MHZ,
    .vsb_if        = AU8522_IF_6MHZ,
};

static struct au8522_config hauppauge_woodbury_config = {
    .demod_address = 0x8e >> 1,
    .status_mode   = AU8522_DEMODLOCKING,
    .qam_if        = AU8522_IF_4MHZ,
    .vsb_if        = AU8522_IF_3_25MHZ,
};

static struct xc5000_config hauppauge_xc5000a_config = {
    .i2c_address      = 0x61,
    .if_khz           = 6000,
    .chip_id          = XC5000A,
};

static struct xc5000_config hauppauge_xc5000c_config = {
    .i2c_address      = 0x61,
    .if_khz           = 6000,
    .chip_id          = XC5000C,
};

static struct mxl5007t_config mxl5007t_hvr950q_config = {
    .xtal_freq_hz = MxL_XTAL_24_MHZ,
    .if_freq_hz = MxL_IF_6_MHZ,
};

static struct tda18271_config hauppauge_woodbury_tunerconfig = {
    .gate    = TDA18271_GATE_DIGITAL,
};

static void au0828_restart_dvb_streaming(struct work_struct *work);

/*-------------------------------------------------------------------*/
static void urb_completion(struct urb *purb)
{
    struct au0828_dev *dev = purb->context;
    int ptype = usb_pipetype(purb->pipe);
    unsigned char *ptr;

    dprintk(2, "%s()\n", __func__);

    if (!dev)
        return;

    if (dev->urb_streaming == 0)
        return;

    if (ptype != PIPE_BULK) {
        printk(KERN_ERR "%s() Unsupported URB type %d\n",
               __func__, ptype);
        return;
    }

    /* See if the stream is corrupted (to work around a hardware
       bug where the stream gets misaligned */
    ptr = purb->transfer_buffer;
    if (purb->actual_length > 0 && ptr[0] != 0x47) {
        dprintk(1, "Need to restart streaming %02x len=%d!\n",
            ptr[0], purb->actual_length);
        schedule_work(&dev->restart_streaming);
        return;
    }

    /* Feed the transport payload into the kernel demux */
    dvb_dmx_swfilter_packets(&dev->dvb.demux,
        purb->transfer_buffer, purb->actual_length / 188);

    /* Clean the buffer before we requeue */
    memset(purb->transfer_buffer, 0, URB_BUFSIZE);

    /* Requeue URB */
    usb_submit_urb(purb, GFP_ATOMIC);
}

static int stop_urb_transfer(struct au0828_dev *dev)
{
    int i;

    dprintk(2, "%s()\n", __func__);

    dev->urb_streaming = 0;
    for (i = 0; i < URB_COUNT; i++) {
        usb_kill_urb(dev->urbs[i]);
        kfree(dev->urbs[i]->transfer_buffer);
        usb_free_urb(dev->urbs[i]);
    }

    return 0;
}

static int start_urb_transfer(struct au0828_dev *dev)
{
    struct urb *purb;
    int i, ret = -ENOMEM;

    dprintk(2, "%s()\n", __func__);

    if (dev->urb_streaming) {
        dprintk(2, "%s: bulk xfer already running!\n", __func__);
        return 0;
    }

    for (i = 0; i < URB_COUNT; i++) {

        dev->urbs[i] = usb_alloc_urb(0, GFP_KERNEL);
        if (!dev->urbs[i])
            goto err;

        purb = dev->urbs[i];

        purb->transfer_buffer = kzalloc(URB_BUFSIZE, GFP_KERNEL);
        if (!purb->transfer_buffer) {
            usb_free_urb(purb);
            dev->urbs[i] = NULL;
            goto err;
        }

        purb->status = -EINPROGRESS;
        usb_fill_bulk_urb(purb,
                  dev->usbdev,
                  usb_rcvbulkpipe(dev->usbdev,
                    _AU0828_BULKPIPE),
                  purb->transfer_buffer,
                  URB_BUFSIZE,
                  urb_completion,
                  dev);

    }

    for (i = 0; i < URB_COUNT; i++) {
        ret = usb_submit_urb(dev->urbs[i], GFP_ATOMIC);
        if (ret != 0) {
            stop_urb_transfer(dev);
            printk(KERN_ERR "%s: failed urb submission, "
                   "err = %d\n", __func__, ret);
            return ret;
        }
    }

    dev->urb_streaming = 1;
    ret = 0;

err:
    return ret;
}

static int au0828_dvb_start_feed(struct dvb_demux_feed *feed)
{
    struct dvb_demux *demux = feed->demux;
    struct au0828_dev *dev = (struct au0828_dev *) demux->priv;
    struct au0828_dvb *dvb = &dev->dvb;
    int ret = 0;

    dprintk(1, "%s()\n", __func__);

    if (!demux->dmx.frontend)
        return -EINVAL;

    if (dvb) {
        mutex_lock(&dvb->lock);
        if (dvb->feeding++ == 0) {
            /* Start transport */
            au0828_write(dev, 0x608, 0x90);
            au0828_write(dev, 0x609, 0x72);
            au0828_write(dev, 0x60a, 0x71);
            au0828_write(dev, 0x60b, 0x01);
            ret = start_urb_transfer(dev);
        }
        mutex_unlock(&dvb->lock);
    }

    return ret;
}

static int au0828_dvb_stop_feed(struct dvb_demux_feed *feed)
{
    struct dvb_demux *demux = feed->demux;
    struct au0828_dev *dev = (struct au0828_dev *) demux->priv;
    struct au0828_dvb *dvb = &dev->dvb;
    int ret = 0;

    dprintk(1, "%s()\n", __func__);

    if (dvb) {
        mutex_lock(&dvb->lock);
        if (--dvb->feeding == 0) {
            /* Stop transport */
            ret = stop_urb_transfer(dev);
            au0828_write(dev, 0x60b, 0x00);
        }
        mutex_unlock(&dvb->lock);
    }

    return ret;
}

static void au0828_restart_dvb_streaming(struct work_struct *work)
{
    struct au0828_dev *dev = container_of(work, struct au0828_dev,
                          restart_streaming);
    struct au0828_dvb *dvb = &dev->dvb;
    int ret;

    if (dev->urb_streaming == 0)
        return;

    dprintk(1, "Restarting streaming...!\n");

    mutex_lock(&dvb->lock);

    /* Stop transport */
    ret = stop_urb_transfer(dev);
    au0828_write(dev, 0x608, 0x00);
    au0828_write(dev, 0x609, 0x00);
    au0828_write(dev, 0x60a, 0x00);
    au0828_write(dev, 0x60b, 0x00);

    /* Start transport */
    au0828_write(dev, 0x608, 0x90);
    au0828_write(dev, 0x609, 0x72);
    au0828_write(dev, 0x60a, 0x71);
    au0828_write(dev, 0x60b, 0x01);
    ret = start_urb_transfer(dev);

    mutex_unlock(&dvb->lock);
}

static int dvb_register(struct au0828_dev *dev)
{
    struct au0828_dvb *dvb = &dev->dvb;
    int result;

    dprintk(1, "%s()\n", __func__);

    INIT_WORK(&dev->restart_streaming, au0828_restart_dvb_streaming);

    /* register adapter */
    result = dvb_register_adapter(&dvb->adapter, DRIVER_NAME, THIS_MODULE,
                      &dev->usbdev->dev, adapter_nr);
    if (result < 0) {
        printk(KERN_ERR "%s: dvb_register_adapter failed "
               "(errno = %d)\n", DRIVER_NAME, result);
        goto fail_adapter;
    }
    dvb->adapter.priv = dev;

    /* register frontend */
    result = dvb_register_frontend(&dvb->adapter, dvb->frontend);
    if (result < 0) {
        printk(KERN_ERR "%s: dvb_register_frontend failed "
               "(errno = %d)\n", DRIVER_NAME, result);
        goto fail_frontend;
    }

    /* register demux stuff */
    dvb->demux.dmx.capabilities =
        DMX_TS_FILTERING | DMX_SECTION_FILTERING |
        DMX_MEMORY_BASED_FILTERING;
    dvb->demux.priv       = dev;
    dvb->demux.filternum  = 256;
    dvb->demux.feednum    = 256;
    dvb->demux.start_feed = au0828_dvb_start_feed;
    dvb->demux.stop_feed  = au0828_dvb_stop_feed;
    result = dvb_dmx_init(&dvb->demux);
    if (result < 0) {
        printk(KERN_ERR "%s: dvb_dmx_init failed (errno = %d)\n",
               DRIVER_NAME, result);
        goto fail_dmx;
    }

    dvb->dmxdev.filternum    = 256;
    dvb->dmxdev.demux        = &dvb->demux.dmx;
    dvb->dmxdev.capabilities = 0;
    result = dvb_dmxdev_init(&dvb->dmxdev, &dvb->adapter);
    if (result < 0) {
        printk(KERN_ERR "%s: dvb_dmxdev_init failed (errno = %d)\n",
               DRIVER_NAME, result);
        goto fail_dmxdev;
    }

    dvb->fe_hw.source = DMX_FRONTEND_0;
    result = dvb->demux.dmx.add_frontend(&dvb->demux.dmx, &dvb->fe_hw);
    if (result < 0) {
        printk(KERN_ERR "%s: add_frontend failed "
               "(DMX_FRONTEND_0, errno = %d)\n", DRIVER_NAME, result);
        goto fail_fe_hw;
    }

    dvb->fe_mem.source = DMX_MEMORY_FE;
    result = dvb->demux.dmx.add_frontend(&dvb->demux.dmx, &dvb->fe_mem);
    if (result < 0) {
        printk(KERN_ERR "%s: add_frontend failed "
               "(DMX_MEMORY_FE, errno = %d)\n", DRIVER_NAME, result);
        goto fail_fe_mem;
    }

    result = dvb->demux.dmx.connect_frontend(&dvb->demux.dmx, &dvb->fe_hw);
    if (result < 0) {
        printk(KERN_ERR "%s: connect_frontend failed (errno = %d)\n",
               DRIVER_NAME, result);
        goto fail_fe_conn;
    }

    /* register network adapter */
    dvb_net_init(&dvb->adapter, &dvb->net, &dvb->demux.dmx);
    return 0;

fail_fe_conn:
    dvb->demux.dmx.remove_frontend(&dvb->demux.dmx, &dvb->fe_mem);
fail_fe_mem:
    dvb->demux.dmx.remove_frontend(&dvb->demux.dmx, &dvb->fe_hw);
fail_fe_hw:
    dvb_dmxdev_release(&dvb->dmxdev);
fail_dmxdev:
    dvb_dmx_release(&dvb->demux);
fail_dmx:
    dvb_unregister_frontend(dvb->frontend);
fail_frontend:
    dvb_frontend_detach(dvb->frontend);
    dvb_unregister_adapter(&dvb->adapter);
fail_adapter:
    return result;
}

void au0828_dvb_unregister(struct au0828_dev *dev)
{
    struct au0828_dvb *dvb = &dev->dvb;

    dprintk(1, "%s()\n", __func__);

    if (dvb->frontend == NULL)
        return;

    dvb_net_release(&dvb->net);
    dvb->demux.dmx.remove_frontend(&dvb->demux.dmx, &dvb->fe_mem);
    dvb->demux.dmx.remove_frontend(&dvb->demux.dmx, &dvb->fe_hw);
    dvb_dmxdev_release(&dvb->dmxdev);
    dvb_dmx_release(&dvb->demux);
    dvb_unregister_frontend(dvb->frontend);
    dvb_frontend_detach(dvb->frontend);
    dvb_unregister_adapter(&dvb->adapter);
}

/* All the DVB attach calls go here, this function get's modified
 * for each new card. No other function in this file needs
 * to change.
 */
int au0828_dvb_register(struct au0828_dev *dev)
{
    struct au0828_dvb *dvb = &dev->dvb;
    int ret;

    dprintk(1, "%s()\n", __func__);

    /* init frontend */
    switch (dev->boardnr) {
    case AU0828_BOARD_HAUPPAUGE_HVR850:
    case AU0828_BOARD_HAUPPAUGE_HVR950Q:
        dvb->frontend = dvb_attach(au8522_attach,
                &hauppauge_hvr950q_config,
                &dev->i2c_adap);
        if (dvb->frontend != NULL)
            switch (dev->board.tuner_type) {
            default:
            case TUNER_XC5000:
                dvb_attach(xc5000_attach, dvb->frontend,
                       &dev->i2c_adap,
                       &hauppauge_xc5000a_config);
                break;
            case TUNER_XC5000C:
                dvb_attach(xc5000_attach, dvb->frontend,
                       &dev->i2c_adap,
                       &hauppauge_xc5000c_config);
                break;
            }
        break;
    case AU0828_BOARD_HAUPPAUGE_HVR950Q_MXL:
        dvb->frontend = dvb_attach(au8522_attach,
                &hauppauge_hvr950q_config,
                &dev->i2c_adap);
        if (dvb->frontend != NULL)
            dvb_attach(mxl5007t_attach, dvb->frontend,
                   &dev->i2c_adap, 0x60,
                   &mxl5007t_hvr950q_config);
        break;
    case AU0828_BOARD_HAUPPAUGE_WOODBURY:
        dvb->frontend = dvb_attach(au8522_attach,
                &hauppauge_woodbury_config,
                &dev->i2c_adap);
        if (dvb->frontend != NULL)
            dvb_attach(tda18271_attach, dvb->frontend,
                   0x60, &dev->i2c_adap,
                   &hauppauge_woodbury_tunerconfig);
        break;
    case AU0828_BOARD_DVICO_FUSIONHDTV7:
        dvb->frontend = dvb_attach(au8522_attach,
                &fusionhdtv7usb_config,
                &dev->i2c_adap);
        if (dvb->frontend != NULL) {
            dvb_attach(xc5000_attach, dvb->frontend,
                &dev->i2c_adap,
                &hauppauge_xc5000a_config);
        }
        break;
    default:
        printk(KERN_WARNING "The frontend of your DVB/ATSC card "
               "isn't supported yet\n");
        break;
    }
    if (NULL == dvb->frontend) {
        printk(KERN_ERR "%s() Frontend initialization failed\n",
               __func__);
        return -1;
    }
    /* define general-purpose callback pointer */
    dvb->frontend->callback = au0828_tuner_callback;

    /* register everything */
    ret = dvb_register(dev);
    if (ret < 0) {
        if (dvb->frontend->ops.release)
            dvb->frontend->ops.release(dvb->frontend);
        return ret;
    }

    return 0;
}