root/drivers/media/usb/dvb-usb-v2/ce6230.c
// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * Intel CE6230 DVB USB driver
 *
 * Copyright (C) 2009 Antti Palosaari <crope@iki.fi>
 */

#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) {
                                if (msg[i].len < 1) {
                                        i = -EOPNOTSUPP;
                                        break;
                                }
                                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) {
                                if (msg[i].len < 1) {
                                        i = -EOPNOTSUPP;
                                        break;
                                }
                                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 const 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 <crope@iki.fi>");
MODULE_DESCRIPTION("Intel CE6230 driver");
MODULE_LICENSE("GPL");