Add support for dummy frontends for DVB-S/C/T, selectable by

module paramter sct=0/1/2 respectively.

1 files changed, 222 insertions, 0 deletions

diff --git a/linux/drivers/media/dvb/frontends/dvb_dummy_fe.c b/linux/drivers/media/dvb/frontends/dvb_dummy_fe.c
new file mode 100644
index 000000000..1576d6898
--- /dev/null
+++ b/linux/drivers/media/dvb/frontends/dvb_dummy_fe.c
@@ -0,0 +1,222 @@
+/* 
+ *  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/init.h>
+
+#include "dvb_frontend.h"
+
+static int debug = 0;
+static int sct = 0;
+#define dprintk	if (debug) printk
+
+
+/* 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 |
+		FE_CAN_CLEAN_SETUP
+};
+
+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()
+{
+	switch(sct)
+	{
+	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_RESET:
+		return 0;
+
+	case FE_SET_TONE:
+		return -EOPNOTSUPP;
+
+	case FE_SET_VOLTAGE:
+		return 0;
+
+	default:
+		return -EOPNOTSUPP;
+        }
+        return 0;
+} 
+
+
+static
+int dvbdummyfe_attach (struct dvb_i2c_bus *i2c)
+{
+	dvb_register_frontend (dvbdummyfe_ioctl, i2c, NULL, frontend_info());
+	return 0;
+}
+
+
+static
+void dvbdummyfe_detach (struct dvb_i2c_bus *i2c)
+{
+	dvb_unregister_frontend (dvbdummyfe_ioctl, i2c);
+}
+
+
+static
+int __init init_dvbdummyfe (void)
+{
+	return dvb_register_i2c_device (THIS_MODULE,
+					dvbdummyfe_attach, 
+					dvbdummyfe_detach);
+	return 0;
+}
+
+
+static 
+void __exit exit_dvbdummyfe (void)
+{
+	dvb_unregister_i2c_device (dvbdummyfe_attach);
+	return;
+}
+
+
+module_init(init_dvbdummyfe);
+module_exit(exit_dvbdummyfe);
+
+
+MODULE_DESCRIPTION("DVB DUMMY Frontend");
+MODULE_AUTHOR("Emard");
+MODULE_LICENSE("GPL");
+MODULE_PARM(debug, "i");
+MODULE_PARM(sct, "i");