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/*
* Driver for Dummy Frontend
*
* Written by Emard <emard@softhome.net>
*
* 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/moduleparam.h>
#include <linux/init.h>
#include "dvb_frontend.h"
#define FRONTEND_NAME "dvbfe_dummy"
static int frontend_type;
module_param(frontend_type, int, 0444);
MODULE_PARM_DESC(frontend_type, "0 == DVB-S, 1 == DVB-C, 2 == DVB-T");
/* depending on module parameter sct deliver different infos
*/
static struct dvb_frontend_info dvb_s_dummyfe_info = {
.name = "DVB-S dummy frontend",
.type = FE_QPSK,
.frequency_min = 950000,
.frequency_max = 2150000,
.frequency_stepsize = 250, /* kHz for QPSK frontends */
.frequency_tolerance = 29500,
.symbol_rate_min = 1000000,
.symbol_rate_max = 45000000,
/* .symbol_rate_tolerance = ???,*/
.notifier_delay = 50, /* 1/20 s */
.caps = FE_CAN_INVERSION_AUTO |
FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 |
FE_CAN_FEC_5_6 | FE_CAN_FEC_7_8 | FE_CAN_FEC_AUTO |
FE_CAN_QPSK
};
static struct dvb_frontend_info dvb_c_dummyfe_info = {
.name = "DVB-C dummy frontend",
.type = FE_QAM,
.frequency_stepsize = 62500,
.frequency_min = 51000000,
.frequency_max = 858000000,
.symbol_rate_min = (57840000/2)/64, /* SACLK/64 == (XIN/2)/64 */
.symbol_rate_max = (57840000/2)/4, /* SACLK/4 */
#if 0
.frequency_tolerance = ???,
.symbol_rate_tolerance = ???, /* ppm */ /* == 8% (spec p. 5) */
.notifier_delay = ?,
#endif
.caps = FE_CAN_QAM_16 | FE_CAN_QAM_32 | FE_CAN_QAM_64 |
FE_CAN_QAM_128 | FE_CAN_QAM_256 |
FE_CAN_FEC_AUTO | FE_CAN_INVERSION_AUTO
};
static struct dvb_frontend_info dvb_t_dummyfe_info = {
.name = "DVB-T dummy frontend",
.type = FE_OFDM,
.frequency_min = 0,
.frequency_max = 863250000,
.frequency_stepsize = 62500,
/*.frequency_tolerance = */ /* FIXME: 12% of SR */
.symbol_rate_min = 0, /* FIXME */
.symbol_rate_max = 9360000, /* FIXME */
.symbol_rate_tolerance = 4000,
.notifier_delay = 0,
.caps = FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 |
FE_CAN_FEC_4_5 | FE_CAN_FEC_5_6 | FE_CAN_FEC_6_7 |
FE_CAN_FEC_7_8 | FE_CAN_FEC_8_9 | FE_CAN_FEC_AUTO |
FE_CAN_QAM_16 | FE_CAN_QAM_64 | FE_CAN_QAM_AUTO |
FE_CAN_TRANSMISSION_MODE_AUTO |
FE_CAN_GUARD_INTERVAL_AUTO |
FE_CAN_HIERARCHY_AUTO,
};
struct dvb_frontend_info *frontend_info(void)
{
switch(frontend_type) {
case 2:
return &dvb_t_dummyfe_info;
case 1:
return &dvb_c_dummyfe_info;
case 0:
default:
return &dvb_s_dummyfe_info;
}
}
static int dvbdummyfe_ioctl (struct dvb_frontend *fe, unsigned int cmd, void *arg)
{
switch (cmd) {
case FE_GET_INFO:
memcpy (arg, frontend_info(),
sizeof(struct dvb_frontend_info));
break;
case FE_READ_STATUS:
{
fe_status_t *status = arg;
*status = FE_HAS_SIGNAL
| FE_HAS_CARRIER
| FE_HAS_VITERBI
| FE_HAS_SYNC
| FE_HAS_LOCK;
break;
}
case FE_READ_BER:
{
u32 *ber = (u32 *) arg;
*ber = 0;
break;
}
case FE_READ_SIGNAL_STRENGTH:
{
u8 signal = 0xff;
*((u16*) arg) = (signal << 8) | signal;
break;
}
case FE_READ_SNR:
{
u8 snr = 0xf0;
*(u16*) arg = (snr << 8) | snr;
break;
}
case FE_READ_UNCORRECTED_BLOCKS:
*(u32*) arg = 0;
break;
case FE_SET_FRONTEND:
break;
case FE_GET_FRONTEND:
break;
case FE_SLEEP:
return 0;
case FE_INIT:
return 0;
case FE_SET_TONE:
return -EOPNOTSUPP;
case FE_SET_VOLTAGE:
return 0;
default:
return -EOPNOTSUPP;
}
return 0;
}
static struct i2c_client client_template;
static int dvbdummyfe_attach_adapter(struct i2c_adapter *adapter)
{
struct dvb_adapter *dvb;
struct i2c_client *client;
int ret;
if ((client = kmalloc(sizeof(struct i2c_client), GFP_KERNEL)) == NULL)
return -ENOMEM;
memcpy(client, &client_template, sizeof(struct i2c_client));
client->adapter = adapter;
if ((ret = i2c_attach_client(client))) {
kfree(client);
return ret;
}
dvb = i2c_get_clientdata(client);
BUG_ON(!dvb);
if ((ret = dvb_register_frontend(dvbdummyfe_ioctl, dvb, NULL,
frontend_info(), THIS_MODULE))) {
kfree(client);
return ret;
}
return 0;
}
static int dvbdummyfe_detach_client(struct i2c_client *client)
{
struct dvb_adapter *dvb = i2c_get_clientdata(client);
dvb_unregister_frontend(dvbdummyfe_ioctl, dvb);
i2c_detach_client(client);
kfree(client);
return 0;
}
static int dvbdummyfe_command(struct i2c_client *client,
unsigned int cmd, void *arg)
{
switch(cmd) {
case FE_REGISTER:
i2c_set_clientdata(client, arg);
break;
case FE_UNREGISTER:
break;
default:
return -EOPNOTSUPP;
}
return 0;
}
static struct i2c_driver driver = {
.owner = THIS_MODULE,
.name = FRONTEND_NAME,
.id = I2C_DRIVERID_DVBFE_DUMMY,
.flags = I2C_DF_NOTIFY,
.attach_adapter = dvbdummyfe_attach_adapter,
.detach_client = dvbdummyfe_detach_client,
.command = dvbdummyfe_command,
};
static struct i2c_client client_template = {
.name = FRONTEND_NAME,
.flags = I2C_CLIENT_ALLOW_USE,
.driver = &driver,
};
static int __init init_dvbdummyfe (void)
{
return i2c_add_driver(&driver);
}
static void __exit exit_dvbdummyfe (void)
{
if (i2c_del_driver(&driver))
printk(KERN_ERR "dummyfe: driver deregistration failed.\n");
}
module_init(init_dvbdummyfe);
module_exit(exit_dvbdummyfe);
MODULE_DESCRIPTION("DVB DUMMY Frontend");
MODULE_AUTHOR("Emard");
MODULE_LICENSE("GPL");
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