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V4L/DVB (4606): Add driver for TUA6100
This driver was originally in budget-av.c, however I have extracted it into a seperate file to permit reuse. I also reworked the code to make it maintainable. I then examined the KNC1 windows drivers and rewrote the code in order to configure the PLL as they do. This solves a lot of reported tuning problems. Signed-off-by: Andrew de Quincey <adq_dvb@lidskialf.net> Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
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Andrew de Quincey
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Mauro Carvalho Chehab
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Sep 26, 2006
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,205 @@ | ||
| /** | ||
| * Driver for Infineon tua6100 pll. | ||
| * | ||
| * (c) 2006 Andrew de Quincey | ||
| * | ||
| * Based on code found in budget-av.c, which has the following: | ||
| * Compiled from various sources by Michael Hunold <michael@mihu.de> | ||
| * | ||
| * CI interface support (c) 2004 Olivier Gournet <ogournet@anevia.com> & | ||
| * Andrew de Quincey <adq_dvb@lidskialf.net> | ||
| * | ||
| * Copyright (C) 2002 Ralph Metzler <rjkm@metzlerbros.de> | ||
| * | ||
| * Copyright (C) 1999-2002 Ralph Metzler | ||
| * & Marcus Metzler for convergence integrated media GmbH | ||
| * 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/dvb/frontend.h> | ||
| #include <asm/types.h> | ||
|
|
||
| #include "tua6100.h" | ||
|
|
||
| struct tua6100_priv { | ||
| /* i2c details */ | ||
| int i2c_address; | ||
| struct i2c_adapter *i2c; | ||
| u32 frequency; | ||
| }; | ||
|
|
||
| static int tua6100_release(struct dvb_frontend *fe) | ||
| { | ||
| if (fe->tuner_priv) | ||
| kfree(fe->tuner_priv); | ||
| fe->tuner_priv = NULL; | ||
| return 0; | ||
| } | ||
|
|
||
| static int tua6100_sleep(struct dvb_frontend *fe) | ||
| { | ||
| struct tua6100_priv *priv = fe->tuner_priv; | ||
| int ret; | ||
| u8 reg0[] = { 0x00, 0x00 }; | ||
| struct i2c_msg msg = { .addr = priv->i2c_address, .flags = 0, .buf = reg0, .len = 2 }; | ||
|
|
||
| if (fe->ops.i2c_gate_ctrl) | ||
| fe->ops.i2c_gate_ctrl(fe, 1); | ||
| if ((ret = i2c_transfer (priv->i2c, &msg, 1)) != 1) { | ||
| printk("%s: i2c error\n", __FUNCTION__); | ||
| } | ||
| if (fe->ops.i2c_gate_ctrl) | ||
| fe->ops.i2c_gate_ctrl(fe, 0); | ||
|
|
||
| return (ret == 1) ? 0 : ret; | ||
| } | ||
|
|
||
| static int tua6100_set_params(struct dvb_frontend *fe, | ||
| struct dvb_frontend_parameters *params) | ||
| { | ||
| struct tua6100_priv *priv = fe->tuner_priv; | ||
| u32 div; | ||
| u32 prediv; | ||
| u8 reg0[] = { 0x00, 0x00 }; | ||
| u8 reg1[] = { 0x01, 0x00, 0x00, 0x00 }; | ||
| u8 reg2[] = { 0x02, 0x00, 0x00 }; | ||
| struct i2c_msg msg0 = { .addr = priv->i2c_address, .flags = 0, .buf = reg0, .len = 2 }; | ||
| struct i2c_msg msg1 = { .addr = priv->i2c_address, .flags = 0, .buf = reg1, .len = 4 }; | ||
| struct i2c_msg msg2 = { .addr = priv->i2c_address, .flags = 0, .buf = reg2, .len = 3 }; | ||
|
|
||
| #define _R 4 | ||
| #define _P 32 | ||
| #define _ri 4000000 | ||
|
|
||
| // setup register 0 | ||
| if (params->frequency < 2000000) { | ||
| reg0[1] = 0x03; | ||
| } else { | ||
| reg0[1] = 0x07; | ||
| } | ||
|
|
||
| // setup register 1 | ||
| if (params->frequency < 1630000) { | ||
| reg1[1] = 0x2c; | ||
| } else { | ||
| reg1[1] = 0x0c; | ||
| } | ||
| if (_P == 64) | ||
| reg1[1] |= 0x40; | ||
| if (params->frequency >= 1525000) | ||
| reg1[1] |= 0x80; | ||
|
|
||
| // register 2 | ||
| reg2[1] = (_R >> 8) & 0x03; | ||
| reg2[2] = _R; | ||
| if (params->frequency < 1455000) { | ||
| reg2[1] |= 0x1c; | ||
| } else if (params->frequency < 1630000) { | ||
| reg2[1] |= 0x0c; | ||
| } else { | ||
| reg2[1] |= 0x1c; | ||
| } | ||
|
|
||
| // The N divisor ratio (note: params->frequency is in kHz, but we need it in Hz) | ||
| prediv = (params->frequency * _R) / (_ri / 1000); | ||
| div = prediv / _P; | ||
| reg1[1] |= (div >> 9) & 0x03; | ||
| reg1[2] = div >> 1; | ||
| reg1[3] = (div << 7); | ||
| priv->frequency = ((div * _P) * (_ri / 1000)) / _R; | ||
|
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| // Finally, calculate and store the value for A | ||
| reg1[3] |= (prediv - (div*_P)) & 0x7f; | ||
|
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| #undef _R | ||
| #undef _P | ||
| #undef _ri | ||
|
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| if (fe->ops.i2c_gate_ctrl) | ||
| fe->ops.i2c_gate_ctrl(fe, 1); | ||
| if (i2c_transfer(priv->i2c, &msg0, 1) != 1) | ||
| return -EIO; | ||
|
|
||
| if (fe->ops.i2c_gate_ctrl) | ||
| fe->ops.i2c_gate_ctrl(fe, 1); | ||
| if (i2c_transfer(priv->i2c, &msg2, 1) != 1) | ||
| return -EIO; | ||
|
|
||
| if (fe->ops.i2c_gate_ctrl) | ||
| fe->ops.i2c_gate_ctrl(fe, 1); | ||
| if (i2c_transfer(priv->i2c, &msg1, 1) != 1) | ||
| return -EIO; | ||
|
|
||
| if (fe->ops.i2c_gate_ctrl) | ||
| fe->ops.i2c_gate_ctrl(fe, 0); | ||
|
|
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| return 0; | ||
| } | ||
|
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| static int tua6100_get_frequency(struct dvb_frontend *fe, u32 *frequency) | ||
| { | ||
| struct tua6100_priv *priv = fe->tuner_priv; | ||
| *frequency = priv->frequency; | ||
| return 0; | ||
| } | ||
|
|
||
| static struct dvb_tuner_ops tua6100_tuner_ops = { | ||
| .info = { | ||
| .name = "Infineon TUA6100", | ||
| .frequency_min = 950000, | ||
| .frequency_max = 2150000, | ||
| .frequency_step = 1000, | ||
| }, | ||
| .release = tua6100_release, | ||
| .sleep = tua6100_sleep, | ||
| .set_params = tua6100_set_params, | ||
| .get_frequency = tua6100_get_frequency, | ||
| }; | ||
|
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| struct dvb_frontend *tua6100_attach(struct dvb_frontend *fe, int addr, struct i2c_adapter *i2c) | ||
| { | ||
| struct tua6100_priv *priv = NULL; | ||
| u8 b1 [] = { 0x80 }; | ||
| u8 b2 [] = { 0x00 }; | ||
| struct i2c_msg msg [] = { { .addr = addr, .flags = 0, .buf = b1, .len = 1 }, | ||
| { .addr = addr, .flags = I2C_M_RD, .buf = b2, .len = 1 } }; | ||
| int ret; | ||
|
|
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| if (fe->ops.i2c_gate_ctrl) | ||
| fe->ops.i2c_gate_ctrl(fe, 1); | ||
| ret = i2c_transfer (i2c, msg, 2); | ||
| if (fe->ops.i2c_gate_ctrl) | ||
| fe->ops.i2c_gate_ctrl(fe, 0); | ||
|
|
||
| if (ret != 2) | ||
| return NULL; | ||
|
|
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| priv = kzalloc(sizeof(struct tua6100_priv), GFP_KERNEL); | ||
| if (priv == NULL) | ||
| return NULL; | ||
|
|
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| priv->i2c_address = addr; | ||
| priv->i2c = i2c; | ||
|
|
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| memcpy(&fe->ops.tuner_ops, &tua6100_tuner_ops, sizeof(struct dvb_tuner_ops)); | ||
| fe->tuner_priv = priv; | ||
| return fe; | ||
| } | ||
| EXPORT_SYMBOL(tua6100_attach); | ||
|
|
||
| MODULE_DESCRIPTION("DVB tua6100 driver"); | ||
| MODULE_AUTHOR("Andrew de Quincey"); | ||
| MODULE_LICENSE("GPL"); |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,47 @@ | ||
| /** | ||
| * Driver for Infineon tua6100 PLL. | ||
| * | ||
| * (c) 2006 Andrew de Quincey | ||
| * | ||
| * Based on code found in budget-av.c, which has the following: | ||
| * Compiled from various sources by Michael Hunold <michael@mihu.de> | ||
| * | ||
| * CI interface support (c) 2004 Olivier Gournet <ogournet@anevia.com> & | ||
| * Andrew de Quincey <adq_dvb@lidskialf.net> | ||
| * | ||
| * Copyright (C) 2002 Ralph Metzler <rjkm@metzlerbros.de> | ||
| * | ||
| * Copyright (C) 1999-2002 Ralph Metzler | ||
| * & Marcus Metzler for convergence integrated media GmbH | ||
| * 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. | ||
| */ | ||
|
|
||
| #ifndef __DVB_TUA6100_H__ | ||
| #define __DVB_TUA6100_H__ | ||
|
|
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| #include <linux/i2c.h> | ||
| #include "dvb_frontend.h" | ||
|
|
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| /** | ||
| * Attach a tua6100 pll to the supplied frontend structure. | ||
| * | ||
| * @param fe Frontend to attach to. | ||
| * @param addr i2c address of the pll. | ||
| * @param i2c i2c adapter to use. | ||
| * @return FE pointer on success, NULL on failure. | ||
| */ | ||
| extern struct dvb_frontend *tua6100_attach(struct dvb_frontend *fe, int addr, struct i2c_adapter *i2c); | ||
|
|
||
| #endif |