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1// SPDX-License-Identifier: GPL-2.0-or-later2/*3 * Driver for Infineon tua6100 pll.4 *5 * (c) 2006 Andrew de Quincey6 *7 * Based on code found in budget-av.c, which has the following:8 * Compiled from various sources by Michael Hunold <michael@mihu.de>9 *10 * CI interface support (c) 2004 Olivier Gournet <ogournet@anevia.com> &11 * Andrew de Quincey <adq_dvb@lidskialf.net>12 *13 * Copyright (C) 2002 Ralph Metzler <rjkm@metzlerbros.de>14 *15 * Copyright (C) 1999-2002 Ralph Metzler16 * & Marcus Metzler for convergence integrated media GmbH17 */18 19#include <linux/slab.h>20#include <linux/module.h>21#include <linux/dvb/frontend.h>22#include <asm/types.h>23 24#include "tua6100.h"25 26struct tua6100_priv {27 /* i2c details */28 int i2c_address;29 struct i2c_adapter *i2c;30 u32 frequency;31};32 33static void tua6100_release(struct dvb_frontend *fe)34{35 kfree(fe->tuner_priv);36 fe->tuner_priv = NULL;37}38 39static int tua6100_sleep(struct dvb_frontend *fe)40{41 struct tua6100_priv *priv = fe->tuner_priv;42 int ret;43 u8 reg0[] = { 0x00, 0x00 };44 struct i2c_msg msg = { .addr = priv->i2c_address, .flags = 0, .buf = reg0, .len = 2 };45 46 if (fe->ops.i2c_gate_ctrl)47 fe->ops.i2c_gate_ctrl(fe, 1);48 if ((ret = i2c_transfer (priv->i2c, &msg, 1)) != 1) {49 printk("%s: i2c error\n", __func__);50 }51 if (fe->ops.i2c_gate_ctrl)52 fe->ops.i2c_gate_ctrl(fe, 0);53 54 return (ret == 1) ? 0 : ret;55}56 57static int tua6100_set_params(struct dvb_frontend *fe)58{59 struct dtv_frontend_properties *c = &fe->dtv_property_cache;60 struct tua6100_priv *priv = fe->tuner_priv;61 u32 div;62 u32 prediv;63 u8 reg0[] = { 0x00, 0x00 };64 u8 reg1[] = { 0x01, 0x00, 0x00, 0x00 };65 u8 reg2[] = { 0x02, 0x00, 0x00 };66 struct i2c_msg msg0 = { .addr = priv->i2c_address, .flags = 0, .buf = reg0, .len = 2 };67 struct i2c_msg msg1 = { .addr = priv->i2c_address, .flags = 0, .buf = reg1, .len = 4 };68 struct i2c_msg msg2 = { .addr = priv->i2c_address, .flags = 0, .buf = reg2, .len = 3 };69 70#define _R_VAL 471#define _P_VAL 3272#define _ri 400000073 74 // setup register 075 if (c->frequency < 2000000)76 reg0[1] = 0x03;77 else78 reg0[1] = 0x07;79 80 // setup register 181 if (c->frequency < 1630000)82 reg1[1] = 0x2c;83 else84 reg1[1] = 0x0c;85 86 if (_P_VAL == 64)87 reg1[1] |= 0x40;88 if (c->frequency >= 1525000)89 reg1[1] |= 0x80;90 91 // register 292 reg2[1] = (_R_VAL >> 8) & 0x03;93 reg2[2] = _R_VAL;94 if (c->frequency < 1455000)95 reg2[1] |= 0x1c;96 else if (c->frequency < 1630000)97 reg2[1] |= 0x0c;98 else99 reg2[1] |= 0x1c;100 101 /*102 * The N divisor ratio (note: c->frequency is in kHz, but we103 * need it in Hz)104 */105 prediv = (c->frequency * _R_VAL) / (_ri / 1000);106 div = prediv / _P_VAL;107 reg1[1] |= (div >> 9) & 0x03;108 reg1[2] = div >> 1;109 reg1[3] = (div << 7);110 priv->frequency = ((div * _P_VAL) * (_ri / 1000)) / _R_VAL;111 112 // Finally, calculate and store the value for A113 reg1[3] |= (prediv - (div*_P_VAL)) & 0x7f;114 115#undef _R_VAL116#undef _P_VAL117#undef _ri118 119 if (fe->ops.i2c_gate_ctrl)120 fe->ops.i2c_gate_ctrl(fe, 1);121 if (i2c_transfer(priv->i2c, &msg0, 1) != 1)122 return -EIO;123 124 if (fe->ops.i2c_gate_ctrl)125 fe->ops.i2c_gate_ctrl(fe, 1);126 if (i2c_transfer(priv->i2c, &msg2, 1) != 1)127 return -EIO;128 129 if (fe->ops.i2c_gate_ctrl)130 fe->ops.i2c_gate_ctrl(fe, 1);131 if (i2c_transfer(priv->i2c, &msg1, 1) != 1)132 return -EIO;133 134 if (fe->ops.i2c_gate_ctrl)135 fe->ops.i2c_gate_ctrl(fe, 0);136 137 return 0;138}139 140static int tua6100_get_frequency(struct dvb_frontend *fe, u32 *frequency)141{142 struct tua6100_priv *priv = fe->tuner_priv;143 *frequency = priv->frequency;144 return 0;145}146 147static const struct dvb_tuner_ops tua6100_tuner_ops = {148 .info = {149 .name = "Infineon TUA6100",150 .frequency_min_hz = 950 * MHz,151 .frequency_max_hz = 2150 * MHz,152 .frequency_step_hz = 1 * MHz,153 },154 .release = tua6100_release,155 .sleep = tua6100_sleep,156 .set_params = tua6100_set_params,157 .get_frequency = tua6100_get_frequency,158};159 160struct dvb_frontend *tua6100_attach(struct dvb_frontend *fe, int addr, struct i2c_adapter *i2c)161{162 struct tua6100_priv *priv = NULL;163 u8 b1 [] = { 0x80 };164 u8 b2 [] = { 0x00 };165 struct i2c_msg msg [] = { { .addr = addr, .flags = 0, .buf = b1, .len = 1 },166 { .addr = addr, .flags = I2C_M_RD, .buf = b2, .len = 1 } };167 int ret;168 169 if (fe->ops.i2c_gate_ctrl)170 fe->ops.i2c_gate_ctrl(fe, 1);171 ret = i2c_transfer (i2c, msg, 2);172 if (fe->ops.i2c_gate_ctrl)173 fe->ops.i2c_gate_ctrl(fe, 0);174 175 if (ret != 2)176 return NULL;177 178 priv = kzalloc(sizeof(struct tua6100_priv), GFP_KERNEL);179 if (priv == NULL)180 return NULL;181 182 priv->i2c_address = addr;183 priv->i2c = i2c;184 185 memcpy(&fe->ops.tuner_ops, &tua6100_tuner_ops, sizeof(struct dvb_tuner_ops));186 fe->tuner_priv = priv;187 return fe;188}189EXPORT_SYMBOL_GPL(tua6100_attach);190 191MODULE_DESCRIPTION("DVB tua6100 driver");192MODULE_AUTHOR("Andrew de Quincey");193MODULE_LICENSE("GPL");194