296 lines
7.0 KiB
C
296 lines
7.0 KiB
C
/* DVB USB compliant linux driver for Conexant USB reference design.
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*
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* The Conexant reference design I saw on their website was only for analogue
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* capturing (using the cx25842). The box I took to write this driver (reverse
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* engineered) is the one labeled Medion MD95700. In addition to the cx25842
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* for analogue capturing it also has a cx22702 DVB-T demodulator on the main
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* board. Besides it has a atiremote (X10) and a USB2.0 hub onboard.
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*
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* Maybe it is a little bit premature to call this driver cxusb, but I assume
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* the USB protocol is identical or at least inherited from the reference
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* design, so it can be reused for the "analogue-only" device (if it will
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* appear at all).
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*
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* TODO: check if the cx25840-driver (from ivtv) can be used for the analogue
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* part
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*
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* Copyright (C) 2005 Patrick Boettcher (patrick.boettcher@desy.de)
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the Free
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* Software Foundation, version 2.
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*
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* see Documentation/dvb/README.dvb-usb for more information
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*/
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#include "cxusb.h"
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#include "cx22702.h"
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/* debug */
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int dvb_usb_cxusb_debug;
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module_param_named(debug,dvb_usb_cxusb_debug, int, 0644);
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MODULE_PARM_DESC(debug, "set debugging level (1=rc (or-able))." DVB_USB_DEBUG_STATUS);
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static int cxusb_ctrl_msg(struct dvb_usb_device *d,
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u8 cmd, u8 *wbuf, int wlen, u8 *rbuf, int rlen)
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{
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int wo = (rbuf == NULL || rlen == 0); /* write-only */
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u8 sndbuf[1+wlen];
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memset(sndbuf,0,1+wlen);
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sndbuf[0] = cmd;
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memcpy(&sndbuf[1],wbuf,wlen);
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if (wo)
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dvb_usb_generic_write(d,sndbuf,1+wlen);
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else
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dvb_usb_generic_rw(d,sndbuf,1+wlen,rbuf,rlen,0);
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return 0;
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}
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/* I2C */
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static void cxusb_set_i2c_path(struct dvb_usb_device *d, enum cxusb_i2c_pathes path)
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{
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struct cxusb_state *st = d->priv;
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u8 o[2],i;
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if (path == st->cur_i2c_path)
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return;
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o[0] = IOCTL_SET_I2C_PATH;
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switch (path) {
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case PATH_CX22702:
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o[1] = 0;
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break;
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case PATH_TUNER_OTHER:
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o[1] = 1;
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break;
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default:
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err("unkown i2c path");
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return;
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}
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cxusb_ctrl_msg(d,CMD_IOCTL,o,2,&i,1);
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if (i != 0x01)
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deb_info("i2c_path setting failed.\n");
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st->cur_i2c_path = path;
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}
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static int cxusb_i2c_xfer(struct i2c_adapter *adap,struct i2c_msg msg[],int num)
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{
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struct dvb_usb_device *d = i2c_get_adapdata(adap);
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int i;
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if (down_interruptible(&d->i2c_sem) < 0)
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return -EAGAIN;
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if (num > 2)
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warn("more than 2 i2c messages at a time is not handled yet. TODO.");
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for (i = 0; i < num; i++) {
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switch (msg[i].addr) {
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case 0x63:
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cxusb_set_i2c_path(d,PATH_CX22702);
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break;
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default:
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cxusb_set_i2c_path(d,PATH_TUNER_OTHER);
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break;
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}
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/* read request */
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if (i+1 < num && (msg[i+1].flags & I2C_M_RD)) {
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u8 obuf[3+msg[i].len], ibuf[1+msg[i+1].len];
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obuf[0] = msg[i].len;
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obuf[1] = msg[i+1].len;
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obuf[2] = msg[i].addr;
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memcpy(&obuf[3],msg[i].buf,msg[i].len);
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if (cxusb_ctrl_msg(d, CMD_I2C_READ,
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obuf, 3+msg[i].len,
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ibuf, 1+msg[i+1].len) < 0)
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break;
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if (ibuf[0] != 0x08)
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deb_info("i2c read could have been failed\n");
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memcpy(msg[i+1].buf,&ibuf[1],msg[i+1].len);
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i++;
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} else { /* write */
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u8 obuf[2+msg[i].len], ibuf;
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obuf[0] = msg[i].addr;
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obuf[1] = msg[i].len;
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memcpy(&obuf[2],msg[i].buf,msg[i].len);
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if (cxusb_ctrl_msg(d,CMD_I2C_WRITE, obuf, 2+msg[i].len, &ibuf,1) < 0)
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break;
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if (ibuf != 0x08)
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deb_info("i2c write could have been failed\n");
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}
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}
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up(&d->i2c_sem);
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return i;
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}
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static u32 cxusb_i2c_func(struct i2c_adapter *adapter)
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{
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return I2C_FUNC_I2C;
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}
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static struct i2c_algorithm cxusb_i2c_algo = {
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.name = "Conexant USB I2C algorithm",
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.id = I2C_ALGO_BIT,
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.master_xfer = cxusb_i2c_xfer,
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.functionality = cxusb_i2c_func,
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};
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static int cxusb_power_ctrl(struct dvb_usb_device *d, int onoff)
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{
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return 0;
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}
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static int cxusb_streaming_ctrl(struct dvb_usb_device *d, int onoff)
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{
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u8 buf[2] = { 0x03, 0x00 };
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if (onoff)
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cxusb_ctrl_msg(d,0x36, buf, 2, NULL, 0);
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else
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cxusb_ctrl_msg(d,0x37, NULL, 0, NULL, 0);
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return 0;
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}
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struct cx22702_config cxusb_cx22702_config = {
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.demod_address = 0x63,
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.output_mode = CX22702_PARALLEL_OUTPUT,
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.pll_init = dvb_usb_pll_init_i2c,
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.pll_set = dvb_usb_pll_set_i2c,
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};
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/* Callbacks for DVB USB */
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static int cxusb_tuner_attach(struct dvb_usb_device *d)
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{
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u8 bpll[4] = { 0x0b, 0xdc, 0x9c, 0xa0 };
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d->pll_addr = 0x61;
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memcpy(d->pll_init,bpll,4);
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d->pll_desc = &dvb_pll_fmd1216me;
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return 0;
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}
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static int cxusb_frontend_attach(struct dvb_usb_device *d)
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{
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u8 buf[2] = { 0x03, 0x00 };
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u8 b = 0;
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if (usb_set_interface(d->udev,0,0) < 0)
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err("set interface to alts=0 failed");
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cxusb_ctrl_msg(d,0xde,&b,0,NULL,0);
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cxusb_set_i2c_path(d,PATH_TUNER_OTHER);
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cxusb_ctrl_msg(d,CMD_POWER_OFF, NULL, 0, &b, 1);
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if (usb_set_interface(d->udev,0,6) < 0)
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err("set interface failed");
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cxusb_ctrl_msg(d,0x36, buf, 2, NULL, 0);
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cxusb_set_i2c_path(d,PATH_CX22702);
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cxusb_ctrl_msg(d,CMD_POWER_ON, NULL, 0, &b, 1);
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if ((d->fe = cx22702_attach(&cxusb_cx22702_config, &d->i2c_adap)) != NULL)
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return 0;
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return -EIO;
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}
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/* DVB USB Driver stuff */
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static struct dvb_usb_properties cxusb_properties;
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static int cxusb_probe(struct usb_interface *intf,
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const struct usb_device_id *id)
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{
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return dvb_usb_device_init(intf,&cxusb_properties,THIS_MODULE);
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}
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static struct usb_device_id cxusb_table [] = {
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{ USB_DEVICE(USB_VID_MEDION, USB_PID_MEDION_MD95700) },
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{} /* Terminating entry */
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};
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MODULE_DEVICE_TABLE (usb, cxusb_table);
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static struct dvb_usb_properties cxusb_properties = {
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.caps = DVB_USB_IS_AN_I2C_ADAPTER,
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.usb_ctrl = CYPRESS_FX2,
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.size_of_priv = sizeof(struct cxusb_state),
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.streaming_ctrl = cxusb_streaming_ctrl,
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.power_ctrl = cxusb_power_ctrl,
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.frontend_attach = cxusb_frontend_attach,
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.tuner_attach = cxusb_tuner_attach,
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.i2c_algo = &cxusb_i2c_algo,
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.generic_bulk_ctrl_endpoint = 0x01,
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/* parameter for the MPEG2-data transfer */
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.urb = {
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.type = DVB_USB_ISOC,
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.count = 5,
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.endpoint = 0x02,
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.u = {
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.isoc = {
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.framesperurb = 32,
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.framesize = 940,
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.interval = 5,
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}
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}
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},
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.num_device_descs = 1,
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.devices = {
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{ "Medion MD95700 (MDUSBTV-HYBRID)",
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{ NULL },
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{ &cxusb_table[0], NULL },
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},
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}
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};
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static struct usb_driver cxusb_driver = {
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.owner = THIS_MODULE,
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.name = "dvb_usb_cxusb",
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.probe = cxusb_probe,
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.disconnect = dvb_usb_device_exit,
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.id_table = cxusb_table,
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};
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/* module stuff */
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static int __init cxusb_module_init(void)
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{
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int result;
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if ((result = usb_register(&cxusb_driver))) {
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err("usb_register failed. Error number %d",result);
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return result;
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}
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return 0;
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}
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static void __exit cxusb_module_exit(void)
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{
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/* deregister this driver from the USB subsystem */
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usb_deregister(&cxusb_driver);
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}
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module_init (cxusb_module_init);
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module_exit (cxusb_module_exit);
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MODULE_AUTHOR("Patrick Boettcher <patrick.boettcher@desy.de>");
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MODULE_DESCRIPTION("Driver for Conexant USB2.0 hybrid reference design");
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MODULE_VERSION("1.0-alpha");
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MODULE_LICENSE("GPL");
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