ce6230.c

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/*
 * Intel CE6230 DVB USB driver
 *
 * Copyright (C) 2009 Antti Palosaari <[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 "ce6230.h"

DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);

static int ce6230_ctrl_msg(struct dvb_usb_device *d, struct usb_req *req)
{
    int ret;
    unsigned int pipe;
    u8 request;
    u8 requesttype;
    u16 value;
    u16 index;
    u8 *buf;

    request = req->cmd;
    value = req->value;
    index = req->index;

    switch (req->cmd) {
    case I2C_READ:
    case DEMOD_READ:
    case REG_READ:
        requesttype = (USB_TYPE_VENDOR | USB_DIR_IN);
        break;
    case I2C_WRITE:
    case DEMOD_WRITE:
    case REG_WRITE:
        requesttype = (USB_TYPE_VENDOR | USB_DIR_OUT);
        break;
    default:
        dev_err(&d->udev->dev, "%s: unknown command=%02x\n",
                KBUILD_MODNAME, req->cmd);
        ret = -EINVAL;
        goto error;
    }

    buf = kmalloc(req->data_len, GFP_KERNEL);
    if (!buf) {
        ret = -ENOMEM;
        goto error;
    }

    if (requesttype == (USB_TYPE_VENDOR | USB_DIR_OUT)) {
        /* write */
        memcpy(buf, req->data, req->data_len);
        pipe = usb_sndctrlpipe(d->udev, 0);
    } else {
        /* read */
        pipe = usb_rcvctrlpipe(d->udev, 0);
    }

    msleep(1); /* avoid I2C errors */

    ret = usb_control_msg(d->udev, pipe, request, requesttype, value, index,
            buf, req->data_len, CE6230_USB_TIMEOUT);

    dvb_usb_dbg_usb_control_msg(d->udev, request, requesttype, value, index,
            buf, req->data_len);

    if (ret < 0)
        dev_err(&d->udev->dev, "%s: usb_control_msg() failed=%d\n",
                KBUILD_MODNAME, ret);
    else
        ret = 0;

    /* read request, copy returned data to return buf */
    if (!ret && requesttype == (USB_TYPE_VENDOR | USB_DIR_IN))
        memcpy(req->data, buf, req->data_len);

    kfree(buf);
error:
    return ret;
}

/* I2C */
static struct zl10353_config ce6230_zl10353_config;

static int ce6230_i2c_master_xfer(struct i2c_adapter *adap,
        struct i2c_msg msg[], int num)
{
    struct dvb_usb_device *d = i2c_get_adapdata(adap);
    int ret = 0, i = 0;
    struct usb_req req;

    if (num > 2)
        return -EOPNOTSUPP;

    memset(&req, 0, sizeof(req));

    if (mutex_lock_interruptible(&d->i2c_mutex) < 0)
        return -EAGAIN;

    while (i < num) {
        if (num > i + 1 && (msg[i+1].flags & I2C_M_RD)) {
            if (msg[i].addr ==
                ce6230_zl10353_config.demod_address) {
                req.cmd = DEMOD_READ;
                req.value = msg[i].addr >> 1;
                req.index = msg[i].buf[0];
                req.data_len = msg[i+1].len;
                req.data = &msg[i+1].buf[0];
                ret = ce6230_ctrl_msg(d, &req);
            } else {
                dev_err(&d->udev->dev, "%s: I2C read not " \
                        "implemented\n",
                        KBUILD_MODNAME);
                ret = -EOPNOTSUPP;
            }
            i += 2;
        } else {
            if (msg[i].addr ==
                ce6230_zl10353_config.demod_address) {
                req.cmd = DEMOD_WRITE;
                req.value = msg[i].addr >> 1;
                req.index = msg[i].buf[0];
                req.data_len = msg[i].len-1;
                req.data = &msg[i].buf[1];
                ret = ce6230_ctrl_msg(d, &req);
            } else {
                req.cmd = I2C_WRITE;
                req.value = 0x2000 + (msg[i].addr >> 1);
                req.index = 0x0000;
                req.data_len = msg[i].len;
                req.data = &msg[i].buf[0];
                ret = ce6230_ctrl_msg(d, &req);
            }
            i += 1;
        }
        if (ret)
            break;
    }

    mutex_unlock(&d->i2c_mutex);
    return ret ? ret : i;
}

static u32 ce6230_i2c_functionality(struct i2c_adapter *adapter)
{
    return I2C_FUNC_I2C;
}

static struct i2c_algorithm ce6230_i2c_algorithm = {
    .master_xfer   = ce6230_i2c_master_xfer,
    .functionality = ce6230_i2c_functionality,
};

/* Callbacks for DVB USB */
static struct zl10353_config ce6230_zl10353_config = {
    .demod_address = 0x1e,
    .adc_clock = 450000,
    .if2 = 45700,
    .no_tuner = 1,
    .parallel_ts = 1,
    .clock_ctl_1 = 0x34,
    .pll_0 = 0x0e,
};

static int ce6230_zl10353_frontend_attach(struct dvb_usb_adapter *adap)
{
    struct dvb_usb_device *d = adap_to_d(adap);

    dev_dbg(&d->udev->dev, "%s:\n", __func__);

    adap->fe[0] = dvb_attach(zl10353_attach, &ce6230_zl10353_config,
            &d->i2c_adap);
    if (adap->fe[0] == NULL)
        return -ENODEV;

    return 0;
}

static struct mxl5005s_config ce6230_mxl5003s_config = {
    .i2c_address     = 0xc6,
    .if_freq         = IF_FREQ_4570000HZ,
    .xtal_freq       = CRYSTAL_FREQ_16000000HZ,
    .agc_mode        = MXL_SINGLE_AGC,
    .tracking_filter = MXL_TF_DEFAULT,
    .rssi_enable     = MXL_RSSI_ENABLE,
    .cap_select      = MXL_CAP_SEL_ENABLE,
    .div_out         = MXL_DIV_OUT_4,
    .clock_out       = MXL_CLOCK_OUT_DISABLE,
    .output_load     = MXL5005S_IF_OUTPUT_LOAD_200_OHM,
    .top         = MXL5005S_TOP_25P2,
    .mod_mode        = MXL_DIGITAL_MODE,
    .if_mode         = MXL_ZERO_IF,
    .AgcMasterByte   = 0x00,
};

static int ce6230_mxl5003s_tuner_attach(struct dvb_usb_adapter *adap)
{
    struct dvb_usb_device *d = adap_to_d(adap);
    int ret;

    dev_dbg(&d->udev->dev, "%s:\n", __func__);

    ret = dvb_attach(mxl5005s_attach, adap->fe[0], &d->i2c_adap,
            &ce6230_mxl5003s_config) == NULL ? -ENODEV : 0;
    return ret;
}

static int ce6230_power_ctrl(struct dvb_usb_device *d, int onoff)
{
    int ret;

    dev_dbg(&d->udev->dev, "%s: onoff=%d\n", __func__, onoff);

    /* InterfaceNumber 1 / AlternateSetting 0     idle
       InterfaceNumber 1 / AlternateSetting 1     streaming */
    ret = usb_set_interface(d->udev, 1, onoff);
    if (ret)
        dev_err(&d->udev->dev, "%s: usb_set_interface() failed=%d\n",
                KBUILD_MODNAME, ret);

    return ret;
}

/* DVB USB Driver stuff */
static struct dvb_usb_device_properties ce6230_props = {
    .driver_name = KBUILD_MODNAME,
    .owner = THIS_MODULE,
    .adapter_nr = adapter_nr,
    .bInterfaceNumber = 1,

    .i2c_algo = &ce6230_i2c_algorithm,
    .power_ctrl = ce6230_power_ctrl,
    .frontend_attach = ce6230_zl10353_frontend_attach,
    .tuner_attach = ce6230_mxl5003s_tuner_attach,

    .num_adapters = 1,
    .adapter = {
        {
            .stream = {
                .type = USB_BULK,
                .count = 6,
                .endpoint = 0x82,
                .u = {
                    .bulk = {
                        .buffersize = (16 * 512),
                    }
                }
            },
        }
    },
};

static const struct usb_device_id ce6230_id_table[] = {
    { DVB_USB_DEVICE(USB_VID_INTEL, USB_PID_INTEL_CE9500,
        &ce6230_props, "Intel CE9500 reference design", NULL) },
    { DVB_USB_DEVICE(USB_VID_AVERMEDIA, USB_PID_AVERMEDIA_A310,
        &ce6230_props, "AVerMedia A310 USB 2.0 DVB-T tuner", NULL) },
    { }
};
MODULE_DEVICE_TABLE(usb, ce6230_id_table);

static struct usb_driver ce6230_usb_driver = {
    .name = KBUILD_MODNAME,
    .id_table = ce6230_id_table,
    .probe = dvb_usbv2_probe,
    .disconnect = dvb_usbv2_disconnect,
    .suspend = dvb_usbv2_suspend,
    .resume = dvb_usbv2_resume,
    .reset_resume = dvb_usbv2_reset_resume,
    .no_dynamic_id = 1,
    .soft_unbind = 1,
};

module_usb_driver(ce6230_usb_driver);

MODULE_AUTHOR("Antti Palosaari <[email protected]>");
MODULE_DESCRIPTION("Intel CE6230 driver");
MODULE_LICENSE("GPL");