Initial import

1 files changed, 487 insertions, 0 deletions

diff --git a/drivers/media/dvb-frontends/tda8083.c b/drivers/media/dvb-frontends/tda8083.c
new file mode 100644
index 000000000..69e62f42e
--- /dev/null
+++ b/drivers/media/dvb-frontends/tda8083.c
@@ -0,0 +1,487 @@
+/*
+    Driver for Philips TDA8083 based QPSK Demodulator
+
+    Copyright (C) 2001 Convergence Integrated Media GmbH
+
+    written by Ralph Metzler <ralph@convergence.de>
+
+    adoption to the new DVB frontend API and diagnostic ioctl's
+    by Holger Waechtler <holger@convergence.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; 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/init.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/string.h>
+#include <linux/slab.h>
+#include <linux/jiffies.h>
+#include "dvb_frontend.h"
+#include "tda8083.h"
+
+
+struct tda8083_state {
+	struct i2c_adapter* i2c;
+	/* configuration settings */
+	const struct tda8083_config* config;
+	struct dvb_frontend frontend;
+};
+
+static int debug;
+#define dprintk(args...) \
+	do { \
+		if (debug) printk(KERN_DEBUG "tda8083: " args); \
+	} while (0)
+
+
+static u8 tda8083_init_tab [] = {
+	0x04, 0x00, 0x4a, 0x79, 0x04, 0x00, 0xff, 0xea,
+	0x48, 0x42, 0x79, 0x60, 0x70, 0x52, 0x9a, 0x10,
+	0x0e, 0x10, 0xf2, 0xa7, 0x93, 0x0b, 0x05, 0xc8,
+	0x9d, 0x00, 0x42, 0x80, 0x00, 0x60, 0x40, 0x00,
+	0x00, 0x75, 0x00, 0xe0, 0x00, 0x00, 0x00, 0x00,
+	0x00, 0x00, 0x00, 0x00
+};
+
+
+static int tda8083_writereg (struct tda8083_state* state, u8 reg, u8 data)
+{
+	int ret;
+	u8 buf [] = { reg, data };
+	struct i2c_msg msg = { .addr = state->config->demod_address, .flags = 0, .buf = buf, .len = 2 };
+
+	ret = i2c_transfer(state->i2c, &msg, 1);
+
+	if (ret != 1)
+		dprintk ("%s: writereg error (reg %02x, ret == %i)\n",
+			__func__, reg, ret);
+
+	return (ret != 1) ? -1 : 0;
+}
+
+static int tda8083_readregs (struct tda8083_state* state, u8 reg1, u8 *b, u8 len)
+{
+	int ret;
+	struct i2c_msg msg [] = { { .addr = state->config->demod_address, .flags = 0, .buf = &reg1, .len = 1 },
+			   { .addr = state->config->demod_address, .flags = I2C_M_RD, .buf = b, .len = len } };
+
+	ret = i2c_transfer(state->i2c, msg, 2);
+
+	if (ret != 2)
+		dprintk ("%s: readreg error (reg %02x, ret == %i)\n",
+			__func__, reg1, ret);
+
+	return ret == 2 ? 0 : -1;
+}
+
+static inline u8 tda8083_readreg (struct tda8083_state* state, u8 reg)
+{
+	u8 val;
+
+	tda8083_readregs (state, reg, &val, 1);
+
+	return val;
+}
+
+static int tda8083_set_inversion (struct tda8083_state* state, fe_spectral_inversion_t inversion)
+{
+	/*  XXX FIXME: implement other modes than FEC_AUTO */
+	if (inversion == INVERSION_AUTO)
+		return 0;
+
+	return -EINVAL;
+}
+
+static int tda8083_set_fec (struct tda8083_state* state, fe_code_rate_t fec)
+{
+	if (fec == FEC_AUTO)
+		return tda8083_writereg (state, 0x07, 0xff);
+
+	if (fec >= FEC_1_2 && fec <= FEC_8_9)
+		return tda8083_writereg (state, 0x07, 1 << (FEC_8_9 - fec));
+
+	return -EINVAL;
+}
+
+static fe_code_rate_t tda8083_get_fec (struct tda8083_state* state)
+{
+	u8 index;
+	static fe_code_rate_t fec_tab [] = { FEC_8_9, FEC_1_2, FEC_2_3, FEC_3_4,
+				       FEC_4_5, FEC_5_6, FEC_6_7, FEC_7_8 };
+
+	index = tda8083_readreg(state, 0x0e) & 0x07;
+
+	return fec_tab [index];
+}
+
+static int tda8083_set_symbolrate (struct tda8083_state* state, u32 srate)
+{
+	u32 ratio;
+	u32 tmp;
+	u8 filter;
+
+	if (srate > 32000000)
+		srate = 32000000;
+	if (srate < 500000)
+		srate = 500000;
+
+	filter = 0;
+	if (srate < 24000000)
+		filter = 2;
+	if (srate < 16000000)
+		filter = 3;
+
+	tmp = 31250 << 16;
+	ratio = tmp / srate;
+
+	tmp = (tmp % srate) << 8;
+	ratio = (ratio << 8) + tmp / srate;
+
+	tmp = (tmp % srate) << 8;
+	ratio = (ratio << 8) + tmp / srate;
+
+	dprintk("tda8083: ratio == %08x\n", (unsigned int) ratio);
+
+	tda8083_writereg (state, 0x05, filter);
+	tda8083_writereg (state, 0x02, (ratio >> 16) & 0xff);
+	tda8083_writereg (state, 0x03, (ratio >>  8) & 0xff);
+	tda8083_writereg (state, 0x04, (ratio      ) & 0xff);
+
+	tda8083_writereg (state, 0x00, 0x3c);
+	tda8083_writereg (state, 0x00, 0x04);
+
+	return 1;
+}
+
+static void tda8083_wait_diseqc_fifo (struct tda8083_state* state, int timeout)
+{
+	unsigned long start = jiffies;
+
+	while (jiffies - start < timeout &&
+	       !(tda8083_readreg(state, 0x02) & 0x80))
+	{
+		msleep(50);
+	}
+}
+
+static int tda8083_set_tone (struct tda8083_state* state, fe_sec_tone_mode_t tone)
+{
+	tda8083_writereg (state, 0x26, 0xf1);
+
+	switch (tone) {
+	case SEC_TONE_OFF:
+		return tda8083_writereg (state, 0x29, 0x00);
+	case SEC_TONE_ON:
+		return tda8083_writereg (state, 0x29, 0x80);
+	default:
+		return -EINVAL;
+	}
+}
+
+static int tda8083_set_voltage (struct tda8083_state* state, fe_sec_voltage_t voltage)
+{
+	switch (voltage) {
+	case SEC_VOLTAGE_13:
+		return tda8083_writereg (state, 0x20, 0x00);
+	case SEC_VOLTAGE_18:
+		return tda8083_writereg (state, 0x20, 0x11);
+	default:
+		return -EINVAL;
+	}
+}
+
+static int tda8083_send_diseqc_burst (struct tda8083_state* state, fe_sec_mini_cmd_t burst)
+{
+	switch (burst) {
+	case SEC_MINI_A:
+		tda8083_writereg (state, 0x29, (5 << 2));  /* send burst A */
+		break;
+	case SEC_MINI_B:
+		tda8083_writereg (state, 0x29, (7 << 2));  /* send B */
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	tda8083_wait_diseqc_fifo (state, 100);
+
+	return 0;
+}
+
+static int tda8083_send_diseqc_msg (struct dvb_frontend* fe,
+				    struct dvb_diseqc_master_cmd *m)
+{
+	struct tda8083_state* state = fe->demodulator_priv;
+	int i;
+
+	tda8083_writereg (state, 0x29, (m->msg_len - 3) | (1 << 2)); /* enable */
+
+	for (i=0; i<m->msg_len; i++)
+		tda8083_writereg (state, 0x23 + i, m->msg[i]);
+
+	tda8083_writereg (state, 0x29, (m->msg_len - 3) | (3 << 2)); /* send!! */
+
+	tda8083_wait_diseqc_fifo (state, 100);
+
+	return 0;
+}
+
+static int tda8083_read_status(struct dvb_frontend* fe, fe_status_t* status)
+{
+	struct tda8083_state* state = fe->demodulator_priv;
+
+	u8 signal = ~tda8083_readreg (state, 0x01);
+	u8 sync = tda8083_readreg (state, 0x02);
+
+	*status = 0;
+
+	if (signal > 10)
+		*status |= FE_HAS_SIGNAL;
+
+	if (sync & 0x01)
+		*status |= FE_HAS_CARRIER;
+
+	if (sync & 0x02)
+		*status |= FE_HAS_VITERBI;
+
+	if (sync & 0x10)
+		*status |= FE_HAS_SYNC;
+
+	if (sync & 0x20) /* frontend can not lock */
+		*status |= FE_TIMEDOUT;
+
+	if ((sync & 0x1f) == 0x1f)
+		*status |= FE_HAS_LOCK;
+
+	return 0;
+}
+
+static int tda8083_read_ber(struct dvb_frontend* fe, u32* ber)
+{
+	struct tda8083_state* state = fe->demodulator_priv;
+	int ret;
+	u8 buf[3];
+
+	if ((ret = tda8083_readregs(state, 0x0b, buf, sizeof(buf))))
+		return ret;
+
+	*ber = ((buf[0] & 0x1f) << 16) | (buf[1] << 8) | buf[2];
+
+	return 0;
+}
+
+static int tda8083_read_signal_strength(struct dvb_frontend* fe, u16* strength)
+{
+	struct tda8083_state* state = fe->demodulator_priv;
+
+	u8 signal = ~tda8083_readreg (state, 0x01);
+	*strength = (signal << 8) | signal;
+
+	return 0;
+}
+
+static int tda8083_read_snr(struct dvb_frontend* fe, u16* snr)
+{
+	struct tda8083_state* state = fe->demodulator_priv;
+
+	u8 _snr = tda8083_readreg (state, 0x08);
+	*snr = (_snr << 8) | _snr;
+
+	return 0;
+}
+
+static int tda8083_read_ucblocks(struct dvb_frontend* fe, u32* ucblocks)
+{
+	struct tda8083_state* state = fe->demodulator_priv;
+
+	*ucblocks = tda8083_readreg(state, 0x0f);
+	if (*ucblocks == 0xff)
+		*ucblocks = 0xffffffff;
+
+	return 0;
+}
+
+static int tda8083_set_frontend(struct dvb_frontend *fe)
+{
+	struct dtv_frontend_properties *p = &fe->dtv_property_cache;
+	struct tda8083_state* state = fe->demodulator_priv;
+
+	if (fe->ops.tuner_ops.set_params) {
+		fe->ops.tuner_ops.set_params(fe);
+		if (fe->ops.i2c_gate_ctrl) fe->ops.i2c_gate_ctrl(fe, 0);
+	}
+
+	tda8083_set_inversion (state, p->inversion);
+	tda8083_set_fec(state, p->fec_inner);
+	tda8083_set_symbolrate(state, p->symbol_rate);
+
+	tda8083_writereg (state, 0x00, 0x3c);
+	tda8083_writereg (state, 0x00, 0x04);
+
+	return 0;
+}
+
+static int tda8083_get_frontend(struct dvb_frontend *fe)
+{
+	struct dtv_frontend_properties *p = &fe->dtv_property_cache;
+	struct tda8083_state* state = fe->demodulator_priv;
+
+	/*  FIXME: get symbolrate & frequency offset...*/
+	/*p->frequency = ???;*/
+	p->inversion = (tda8083_readreg (state, 0x0e) & 0x80) ?
+			INVERSION_ON : INVERSION_OFF;
+	p->fec_inner = tda8083_get_fec(state);
+	/*p->symbol_rate = tda8083_get_symbolrate (state);*/
+
+	return 0;
+}
+
+static int tda8083_sleep(struct dvb_frontend* fe)
+{
+	struct tda8083_state* state = fe->demodulator_priv;
+
+	tda8083_writereg (state, 0x00, 0x02);
+	return 0;
+}
+
+static int tda8083_init(struct dvb_frontend* fe)
+{
+	struct tda8083_state* state = fe->demodulator_priv;
+	int i;
+
+	for (i=0; i<44; i++)
+		tda8083_writereg (state, i, tda8083_init_tab[i]);
+
+	tda8083_writereg (state, 0x00, 0x3c);
+	tda8083_writereg (state, 0x00, 0x04);
+
+	return 0;
+}
+
+static int tda8083_diseqc_send_burst(struct dvb_frontend* fe, fe_sec_mini_cmd_t burst)
+{
+	struct tda8083_state* state = fe->demodulator_priv;
+
+	tda8083_send_diseqc_burst (state, burst);
+	tda8083_writereg (state, 0x00, 0x3c);
+	tda8083_writereg (state, 0x00, 0x04);
+
+	return 0;
+}
+
+static int tda8083_diseqc_set_tone(struct dvb_frontend* fe, fe_sec_tone_mode_t tone)
+{
+	struct tda8083_state* state = fe->demodulator_priv;
+
+	tda8083_set_tone (state, tone);
+	tda8083_writereg (state, 0x00, 0x3c);
+	tda8083_writereg (state, 0x00, 0x04);
+
+	return 0;
+}
+
+static int tda8083_diseqc_set_voltage(struct dvb_frontend* fe, fe_sec_voltage_t voltage)
+{
+	struct tda8083_state* state = fe->demodulator_priv;
+
+	tda8083_set_voltage (state, voltage);
+	tda8083_writereg (state, 0x00, 0x3c);
+	tda8083_writereg (state, 0x00, 0x04);
+
+	return 0;
+}
+
+static void tda8083_release(struct dvb_frontend* fe)
+{
+	struct tda8083_state* state = fe->demodulator_priv;
+	kfree(state);
+}
+
+static struct dvb_frontend_ops tda8083_ops;
+
+struct dvb_frontend* tda8083_attach(const struct tda8083_config* config,
+				    struct i2c_adapter* i2c)
+{
+	struct tda8083_state* state = NULL;
+
+	/* allocate memory for the internal state */
+	state = kzalloc(sizeof(struct tda8083_state), GFP_KERNEL);
+	if (state == NULL) goto error;
+
+	/* setup the state */
+	state->config = config;
+	state->i2c = i2c;
+
+	/* check if the demod is there */
+	if ((tda8083_readreg(state, 0x00)) != 0x05) goto error;
+
+	/* create dvb_frontend */
+	memcpy(&state->frontend.ops, &tda8083_ops, sizeof(struct dvb_frontend_ops));
+	state->frontend.demodulator_priv = state;
+	return &state->frontend;
+
+error:
+	kfree(state);
+	return NULL;
+}
+
+static struct dvb_frontend_ops tda8083_ops = {
+	.delsys = { SYS_DVBS },
+	.info = {
+		.name			= "Philips TDA8083 DVB-S",
+		.frequency_min		= 920000,     /* TDA8060 */
+		.frequency_max		= 2200000,    /* TDA8060 */
+		.frequency_stepsize	= 125,   /* kHz for QPSK frontends */
+	/*      .frequency_tolerance	= ???,*/
+		.symbol_rate_min	= 12000000,
+		.symbol_rate_max	= 30000000,
+	/*      .symbol_rate_tolerance	= ???,*/
+		.caps = FE_CAN_INVERSION_AUTO |
+			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_QPSK | FE_CAN_MUTE_TS
+	},
+
+	.release = tda8083_release,
+
+	.init = tda8083_init,
+	.sleep = tda8083_sleep,
+
+	.set_frontend = tda8083_set_frontend,
+	.get_frontend = tda8083_get_frontend,
+
+	.read_status = tda8083_read_status,
+	.read_signal_strength = tda8083_read_signal_strength,
+	.read_snr = tda8083_read_snr,
+	.read_ber = tda8083_read_ber,
+	.read_ucblocks = tda8083_read_ucblocks,
+
+	.diseqc_send_master_cmd = tda8083_send_diseqc_msg,
+	.diseqc_send_burst = tda8083_diseqc_send_burst,
+	.set_tone = tda8083_diseqc_set_tone,
+	.set_voltage = tda8083_diseqc_set_voltage,
+};
+
+module_param(debug, int, 0644);
+MODULE_PARM_DESC(debug, "Turn on/off frontend debugging (default:off).");
+
+MODULE_DESCRIPTION("Philips TDA8083 DVB-S Demodulator");
+MODULE_AUTHOR("Ralph Metzler, Holger Waechtler");
+MODULE_LICENSE("GPL");
+
+EXPORT_SYMBOL(tda8083_attach);