V4L/DVB (5543): Tda10023: Add support for frontend TDA10023

Add support for the frontend TDA10023 and add cards that need the
tda10023.

Signed-off-by: Hartmut Birr <e9hack@googlemail.com>
Signed-off-by: Georg Acher <acher@in.tum.de>
Signed-off-by: Oliver Endriss <o.endriss@gmx.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

1 files changed, 540 insertions, 0 deletions

diff --git a/drivers/media/dvb/frontends/tda10023.c b/drivers/media/dvb/frontends/tda10023.c
new file mode 100644
index 00000000000..da796e784be
--- /dev/null
+++ b/drivers/media/dvb/frontends/tda10023.c
@@ -0,0 +1,540 @@
+/*
+    TDA10023  - DVB-C decoder
+    (as used in Philips CU1216-3 NIM and the Reelbox DVB-C tuner card)
+
+    Copyright (C) 2005 Georg Acher, BayCom GmbH (acher at baycom dot de)
+    Copyright (c) 2006 Hartmut Birr (e9hack at gmail dot com)
+
+    Remotely based on tda10021.c
+    Copyright (C) 1999 Convergence Integrated Media GmbH <ralph@convergence.de>
+    Copyright (C) 2004 Markus Schulz <msc@antzsystem.de>
+		   Support for TDA10021
+
+    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/delay.h>
+#include <linux/errno.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/string.h>
+#include <linux/slab.h>
+
+#include <asm/div64.h>
+
+#include "dvb_frontend.h"
+#include "tda1002x.h"
+
+
+struct tda10023_state {
+	struct i2c_adapter* i2c;
+	/* configuration settings */
+	const struct tda1002x_config* config;
+	struct dvb_frontend frontend;
+
+	u8 pwm;
+	u8 reg0;
+};
+
+
+#define dprintk(x...)
+
+static int verbose;
+
+#define XTAL   28920000UL
+#define PLL_M  8UL
+#define PLL_P  4UL
+#define PLL_N  1UL
+#define SYSCLK (XTAL*PLL_M/(PLL_N*PLL_P))  // -> 57840000
+
+static u8 tda10023_inittab[]={
+	// reg mask val
+	0x2a,0xff,0x02,  // PLL3, Bypass, Power Down
+	0xff,0x64,0x00,  // Sleep 100ms
+	0x2a,0xff,0x03,  // PLL3, Bypass, Power Down
+	0xff,0x64,0x00,  // Sleep 100ms
+	0x28,0xff,PLL_M-1,  // PLL1 M=8
+	0x29,0xff,((PLL_P-1)<<6)|(PLL_N-1),  // PLL2
+	0x00,0xff,0x23,  // GPR FSAMPLING=1
+	0x2a,0xff,0x08,  // PLL3 PSACLK=1
+	0xff,0x64,0x00,  // Sleep 100ms
+	0x1f,0xff,0x00,  // RESET
+	0xff,0x64,0x00,  // Sleep 100ms
+	0xe6,0x0c,0x04,  // RSCFG_IND
+	0x10,0xc0,0x80,  // DECDVBCFG1 PBER=1
+
+	0x0e,0xff,0x82,  // GAIN1
+	0x03,0x08,0x08,  // CLKCONF DYN=1
+	0x2e,0xbf,0x30,  // AGCCONF2 TRIAGC=0,POSAGC=ENAGCIF=1 PPWMTUN=0 PPWMIF=0
+	0x01,0xff,0x30,  // AGCREF
+	0x1e,0x84,0x84,  // CONTROL SACLK_ON=1
+	0x1b,0xff,0xc8,  // ADC TWOS=1
+	0x3b,0xff,0xff,  // IFMAX
+	0x3c,0xff,0x00,  // IFMIN
+	0x34,0xff,0x00,  // PWMREF
+	0x35,0xff,0xff,  // TUNMAX
+	0x36,0xff,0x00,  // TUNMIN
+	0x06,0xff,0x7f,  // EQCONF1 POSI=7 ENADAPT=ENEQUAL=DFE=1    // 0x77
+	0x1c,0x30,0x30,  // EQCONF2 STEPALGO=SGNALGO=1
+	0x37,0xff,0xf6,  // DELTAF_LSB
+	0x38,0xff,0xff,  // DELTAF_MSB
+	0x02,0xff,0x93,  // AGCCONF1  IFS=1 KAGCIF=2 KAGCTUN=3
+	0x2d,0xff,0xf6,  // SWEEP SWPOS=1 SWDYN=7 SWSTEP=1 SWLEN=2
+	0x04,0x10,0x00,   // SWRAMP=1
+	0x12,0xff,0xa1,  // INTP1 POCLKP=1 FEL=1 MFS=0
+	0x2b,0x01,0xa1,  // INTS1
+	0x20,0xff,0x04,  // INTP2 SWAPP=? MSBFIRSTP=? INTPSEL=?
+	0x2c,0xff,0x0d,  // INTP/S TRIP=0 TRIS=0
+	0xc4,0xff,0x00,
+	0xc3,0x30,0x00,
+	0xb5,0xff,0x19,  // ERAGC_THD
+	0x00,0x03,0x01,  // GPR, CLBS soft reset
+	0x00,0x03,0x03,  // GPR, CLBS soft reset
+	0xff,0x64,0x00,  // Sleep 100ms
+	0xff,0xff,0xff
+};
+
+static u8 tda10023_readreg (struct tda10023_state* state, u8 reg)
+{
+	u8 b0 [] = { reg };
+	u8 b1 [] = { 0 };
+	struct i2c_msg msg [] = { { .addr = state->config->demod_address, .flags = 0, .buf = b0, .len = 1 },
+				  { .addr = state->config->demod_address, .flags = I2C_M_RD, .buf = b1, .len = 1 } };
+	int ret;
+
+	ret = i2c_transfer (state->i2c, msg, 2);
+	if (ret != 2)
+		printk("DVB: TDA10023: %s: readreg error (ret == %i)\n",
+				 __FUNCTION__, ret);
+	return b1[0];
+}
+
+static int tda10023_writereg (struct tda10023_state* state, u8 reg, u8 data)
+{
+	u8 buf[] = { reg, data };
+	struct i2c_msg msg = { .addr = state->config->demod_address, .flags = 0, .buf = buf, .len = 2 };
+	int ret;
+
+	ret = i2c_transfer (state->i2c, &msg, 1);
+	if (ret != 1)
+		printk("DVB: TDA10023(%d): %s, writereg error "
+			"(reg == 0x%02x, val == 0x%02x, ret == %i)\n",
+			state->frontend.dvb->num, __FUNCTION__, reg, data, ret);
+
+	return (ret != 1) ? -EREMOTEIO : 0;
+}
+
+
+static int tda10023_writebit (struct tda10023_state* state, u8 reg, u8 mask,u8 data)
+{
+	if (mask==0xff)
+		return tda10023_writereg(state, reg, data);
+	else {
+		u8 val;
+		val=tda10023_readreg(state,reg);
+		val&=~mask;
+		val|=(data&mask);
+		return tda10023_writereg(state, reg, val);
+	}
+}
+
+static void tda10023_writetab(struct tda10023_state* state, u8* tab)
+{
+	u8 r,m,v;
+	while (1) {
+		r=*tab++;
+		m=*tab++;
+		v=*tab++;
+		if (r==0xff) {
+			if (m==0xff)
+				break;
+			else
+				msleep(m);
+		}
+		else
+			tda10023_writebit(state,r,m,v);
+	}
+}
+
+//get access to tuner
+static int lock_tuner(struct tda10023_state* state)
+{
+	u8 buf[2] = { 0x0f, 0xc0 };
+	struct i2c_msg msg = {.addr=state->config->demod_address, .flags=0, .buf=buf, .len=2};
+
+	if(i2c_transfer(state->i2c, &msg, 1) != 1)
+	{
+		printk("tda10023: lock tuner fails\n");
+		return -EREMOTEIO;
+	}
+	return 0;
+}
+
+//release access from tuner
+static int unlock_tuner(struct tda10023_state* state)
+{
+	u8 buf[2] = { 0x0f, 0x40 };
+	struct i2c_msg msg_post={.addr=state->config->demod_address, .flags=0, .buf=buf, .len=2};
+
+	if(i2c_transfer(state->i2c, &msg_post, 1) != 1)
+	{
+		printk("tda10023: unlock tuner fails\n");
+		return -EREMOTEIO;
+	}
+	return 0;
+}
+
+static int tda10023_setup_reg0 (struct tda10023_state* state, u8 reg0)
+{
+	reg0 |= state->reg0 & 0x63;
+
+	tda10023_writereg (state, 0x00, reg0 & 0xfe);
+	tda10023_writereg (state, 0x00, reg0 | 0x01);
+
+	state->reg0 = reg0;
+	return 0;
+}
+
+static int tda10023_set_symbolrate (struct tda10023_state* state, u32 sr)
+{
+	s32 BDR;
+	s32 BDRI;
+	s16 SFIL=0;
+	u16 NDEC = 0;
+
+	if (sr > (SYSCLK/(2*4)))
+		sr=SYSCLK/(2*4);
+
+	if (sr<870000)
+		sr=870000;
+
+	if (sr < (u32)(SYSCLK/98.40)) {
+		NDEC=3;
+		SFIL=1;
+	} else if (sr<(u32)(SYSCLK/64.0)) {
+		NDEC=3;
+		SFIL=0;
+	} else if (sr<(u32)(SYSCLK/49.2)) {
+		NDEC=2;
+		SFIL=1;
+	} else if (sr<(u32)(SYSCLK/32.0)) {
+		NDEC=2;
+		SFIL=0;
+	} else if (sr<(u32)(SYSCLK/24.6)) {
+		NDEC=1;
+		SFIL=1;
+	} else if (sr<(u32)(SYSCLK/16.0)) {
+		NDEC=1;
+		SFIL=0;
+	} else if (sr<(u32)(SYSCLK/12.3)) {
+		NDEC=0;
+		SFIL=1;
+	}
+
+	BDRI=SYSCLK*16;
+	BDRI>>=NDEC;
+	BDRI +=sr/2;
+	BDRI /=sr;
+
+	if (BDRI>255)
+		BDRI=255;
+
+	{
+		u64 BDRX;
+
+		BDRX=1<<(24+NDEC);
+		BDRX*=sr;
+		do_div(BDRX,SYSCLK); 	// BDRX/=SYSCLK;
+
+		BDR=(s32)BDRX;
+	}
+//	printk("Symbolrate %i, BDR %i BDRI %i, NDEC %i\n",sr,BDR,BDRI,NDEC);
+	tda10023_writebit (state, 0x03, 0xc0, NDEC<<6);
+	tda10023_writereg (state, 0x0a, BDR&255);
+	tda10023_writereg (state, 0x0b, (BDR>>8)&255);
+	tda10023_writereg (state, 0x0c, (BDR>>16)&31);
+	tda10023_writereg (state, 0x0d, BDRI);
+	tda10023_writereg (state, 0x3d, (SFIL<<7));
+	return 0;
+}
+
+static int tda10023_init (struct dvb_frontend *fe)
+{
+	struct tda10023_state* state = fe->demodulator_priv;
+
+	dprintk("DVB: TDA10023(%d): init chip\n", fe->adapter->num);
+
+	tda10023_writetab(state, tda10023_inittab);
+
+	return 0;
+}
+
+static int tda10023_set_parameters (struct dvb_frontend *fe,
+			    struct dvb_frontend_parameters *p)
+{
+	struct tda10023_state* state = fe->demodulator_priv;
+
+	static int qamvals[6][6] = {
+		//  QAM   LOCKTHR  MSETH   AREF AGCREFNYQ  ERAGCNYQ_THD
+		{ (5<<2),  0x78,    0x8c,   0x96,   0x78,   0x4c  },  // 4 QAM
+		{ (0<<2),  0x87,    0xa2,   0x91,   0x8c,   0x57  },  // 16 QAM
+		{ (1<<2),  0x64,    0x74,   0x96,   0x8c,   0x57  },  // 32 QAM
+		{ (2<<2),  0x46,    0x43,   0x6a,   0x6a,   0x44  },  // 64 QAM
+		{ (3<<2),  0x36,    0x34,   0x7e,   0x78,   0x4c  },  // 128 QAM
+		{ (4<<2),  0x26,    0x23,   0x6c,   0x5c,   0x3c  },  // 256 QAM
+	};
+
+	int qam = p->u.qam.modulation;
+
+	if (qam < 0 || qam > 5)
+		return -EINVAL;
+
+	if (fe->ops.tuner_ops.set_params) {
+		fe->ops.tuner_ops.set_params(fe, p);
+		if (fe->ops.i2c_gate_ctrl) fe->ops.i2c_gate_ctrl(fe, 0);
+	}
+
+	tda10023_set_symbolrate (state, p->u.qam.symbol_rate);
+	tda10023_writereg (state, 0x05, qamvals[qam][1]);
+	tda10023_writereg (state, 0x08, qamvals[qam][2]);
+	tda10023_writereg (state, 0x09, qamvals[qam][3]);
+	tda10023_writereg (state, 0xb4, qamvals[qam][4]);
+	tda10023_writereg (state, 0xb6, qamvals[qam][5]);
+
+//	tda10023_writereg (state, 0x04, (p->inversion?0x12:0x32));
+//	tda10023_writebit (state, 0x04, 0x60, (p->inversion?0:0x20));
+	tda10023_writebit (state, 0x04, 0x40, 0x40);
+	tda10023_setup_reg0 (state, qamvals[qam][0]);
+
+	return 0;
+}
+
+static int tda10023_read_status(struct dvb_frontend* fe, fe_status_t* status)
+{
+	struct tda10023_state* state = fe->demodulator_priv;
+	int sync;
+
+	*status = 0;
+
+	//0x11[1] == CARLOCK -> Carrier locked
+	//0x11[2] == FSYNC -> Frame synchronisation
+	//0x11[3] == FEL -> Front End locked
+	//0x11[6] == NODVB -> DVB Mode Information
+	sync = tda10023_readreg (state, 0x11);
+
+	if (sync & 2)
+		*status |= FE_HAS_SIGNAL|FE_HAS_CARRIER;
+
+	if (sync & 4)
+		*status |= FE_HAS_SYNC|FE_HAS_VITERBI;
+
+	if (sync & 8)
+		*status |= FE_HAS_LOCK;
+
+	return 0;
+}
+
+static int tda10023_read_ber(struct dvb_frontend* fe, u32* ber)
+{
+	struct tda10023_state* state = fe->demodulator_priv;
+	u8 a,b,c;
+	a=tda10023_readreg(state, 0x14);
+	b=tda10023_readreg(state, 0x15);
+	c=tda10023_readreg(state, 0x16)&0xf;
+	tda10023_writebit (state, 0x10, 0xc0, 0x00);
+
+	*ber = a | (b<<8)| (c<<16);
+	return 0;
+}
+
+static int tda10023_read_signal_strength(struct dvb_frontend* fe, u16* strength)
+{
+	struct tda10023_state* state = fe->demodulator_priv;
+	u8 ifgain=tda10023_readreg(state, 0x2f);
+
+	u16 gain = ((255-tda10023_readreg(state, 0x17))) + (255-ifgain)/16;
+	// Max raw value is about 0xb0 -> Normalize to >0xf0 after 0x90
+	if (gain>0x90)
+		gain=gain+2*(gain-0x90);
+	if (gain>255)
+		gain=255;
+
+	*strength = (gain<<8)|gain;
+	return 0;
+}
+
+static int tda10023_read_snr(struct dvb_frontend* fe, u16* snr)
+{
+	struct tda10023_state* state = fe->demodulator_priv;
+
+	u8 quality = ~tda10023_readreg(state, 0x18);
+	*snr = (quality << 8) | quality;
+	return 0;
+}
+
+static int tda10023_read_ucblocks(struct dvb_frontend* fe, u32* ucblocks)
+{
+	struct tda10023_state* state = fe->demodulator_priv;
+	u8 a,b,c,d;
+	a= tda10023_readreg (state, 0x74);
+	b= tda10023_readreg (state, 0x75);
+	c= tda10023_readreg (state, 0x76);
+	d= tda10023_readreg (state, 0x77);
+	*ucblocks = a | (b<<8)|(c<<16)|(d<<24);
+
+	tda10023_writebit (state, 0x10, 0x20,0x00);
+	tda10023_writebit (state, 0x10, 0x20,0x20);
+	tda10023_writebit (state, 0x13, 0x01, 0x00);
+
+	return 0;
+}
+
+static int tda10023_get_frontend(struct dvb_frontend* fe, struct dvb_frontend_parameters *p)
+{
+	struct tda10023_state* state = fe->demodulator_priv;
+	int sync,inv;
+	s8 afc = 0;
+
+	sync = tda10023_readreg(state, 0x11);
+	afc = tda10023_readreg(state, 0x19);
+	inv = tda10023_readreg(state, 0x04);
+
+	if (verbose) {
+		/* AFC only valid when carrier has been recovered */
+		printk(sync & 2 ? "DVB: TDA10023(%d): AFC (%d) %dHz\n" :
+				  "DVB: TDA10023(%d): [AFC (%d) %dHz]\n",
+			state->frontend.dvb->num, afc,
+		       -((s32)p->u.qam.symbol_rate * afc) >> 10);
+	}
+
+	p->inversion = (inv&0x20?0:1);
+	p->u.qam.modulation = ((state->reg0 >> 2) & 7) + QAM_16;
+
+	p->u.qam.fec_inner = FEC_NONE;
+	p->frequency = ((p->frequency + 31250) / 62500) * 62500;
+
+	if (sync & 2)
+		p->frequency -= ((s32)p->u.qam.symbol_rate * afc) >> 10;
+
+	return 0;
+}
+
+static int tda10023_sleep(struct dvb_frontend* fe)
+{
+	struct tda10023_state* state = fe->demodulator_priv;
+
+	tda10023_writereg (state, 0x1b, 0x02);  /* pdown ADC */
+	tda10023_writereg (state, 0x00, 0x80);  /* standby */
+
+	return 0;
+}
+
+static int tda10023_i2c_gate_ctrl(struct dvb_frontend* fe, int enable)
+{
+	struct tda10023_state* state = fe->demodulator_priv;
+
+	if (enable) {
+		lock_tuner(state);
+	} else {
+		unlock_tuner(state);
+	}
+	return 0;
+}
+
+static void tda10023_release(struct dvb_frontend* fe)
+{
+	struct tda10023_state* state = fe->demodulator_priv;
+	kfree(state);
+}
+
+static struct dvb_frontend_ops tda10023_ops;
+
+struct dvb_frontend* tda10023_attach(const struct tda1002x_config* config,
+				     struct i2c_adapter* i2c,
+				     u8 pwm)
+{
+	struct tda10023_state* state = NULL;
+	int i;
+
+	/* allocate memory for the internal state */
+	state = kmalloc(sizeof(struct tda10023_state), GFP_KERNEL);
+	if (state == NULL) goto error;
+
+	/* setup the state */
+	state->config = config;
+	state->i2c = i2c;
+	memcpy(&state->frontend.ops, &tda10023_ops, sizeof(struct dvb_frontend_ops));
+	state->pwm = pwm;
+	for (i=0; i < sizeof(tda10023_inittab)/sizeof(*tda10023_inittab);i+=3) {
+		if (tda10023_inittab[i] == 0x00) {
+			state->reg0 = tda10023_inittab[i+2];
+			break;
+		}
+	}
+
+	// Wakeup if in standby
+	tda10023_writereg (state, 0x00, 0x33);
+	/* check if the demod is there */
+	if ((tda10023_readreg(state, 0x1a) & 0xf0) != 0x70) goto error;
+
+	/* create dvb_frontend */
+	memcpy(&state->frontend.ops, &tda10023_ops, sizeof(struct dvb_frontend_ops));
+	state->frontend.demodulator_priv = state;
+	return &state->frontend;
+
+error:
+	kfree(state);
+	return NULL;
+}
+
+static struct dvb_frontend_ops tda10023_ops = {
+
+	.info = {
+		.name = "Philips TDA10023 DVB-C",
+		.type = FE_QAM,
+		.frequency_stepsize = 62500,
+		.frequency_min = 51000000,
+		.frequency_max = 858000000,
+		.symbol_rate_min = (SYSCLK/2)/64,     /* SACLK/64 == (SYSCLK/2)/64 */
+		.symbol_rate_max = (SYSCLK/2)/4,      /* SACLK/4 */
+		.caps = 0x400 | //FE_CAN_QAM_4
+			FE_CAN_QAM_16 | FE_CAN_QAM_32 | FE_CAN_QAM_64 |
+			FE_CAN_QAM_128 | FE_CAN_QAM_256 |
+			FE_CAN_FEC_AUTO
+	},
+
+	.release = tda10023_release,
+
+	.init = tda10023_init,
+	.sleep = tda10023_sleep,
+	.i2c_gate_ctrl = tda10023_i2c_gate_ctrl,
+
+	.set_frontend = tda10023_set_parameters,
+	.get_frontend = tda10023_get_frontend,
+
+	.read_status = tda10023_read_status,
+	.read_ber = tda10023_read_ber,
+	.read_signal_strength = tda10023_read_signal_strength,
+	.read_snr = tda10023_read_snr,
+	.read_ucblocks = tda10023_read_ucblocks,
+};
+
+
+MODULE_DESCRIPTION("Philips TDA10023 DVB-C demodulator driver");
+MODULE_AUTHOR("Georg Acher, Hartmut Birr");
+MODULE_LICENSE("GPL");
+
+EXPORT_SYMBOL(tda10023_attach);