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