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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 | // SPDX-License-Identifier: GPL-2.0-or-later /* * 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 */ #include <linux/slab.h> #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 void tua6100_release(struct dvb_frontend *fe) { kfree(fe->tuner_priv); fe->tuner_priv = NULL; } 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", __func__); } 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 dtv_frontend_properties *c = &fe->dtv_property_cache; 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_VAL 4 #define _P_VAL 32 #define _ri 4000000 // setup register 0 if (c->frequency < 2000000) reg0[1] = 0x03; else reg0[1] = 0x07; // setup register 1 if (c->frequency < 1630000) reg1[1] = 0x2c; else reg1[1] = 0x0c; if (_P_VAL == 64) reg1[1] |= 0x40; if (c->frequency >= 1525000) reg1[1] |= 0x80; // register 2 reg2[1] = (_R_VAL >> 8) & 0x03; reg2[2] = _R_VAL; if (c->frequency < 1455000) reg2[1] |= 0x1c; else if (c->frequency < 1630000) reg2[1] |= 0x0c; else reg2[1] |= 0x1c; /* * The N divisor ratio (note: c->frequency is in kHz, but we * need it in Hz) */ prediv = (c->frequency * _R_VAL) / (_ri / 1000); div = prediv / _P_VAL; reg1[1] |= (div >> 9) & 0x03; reg1[2] = div >> 1; reg1[3] = (div << 7); priv->frequency = ((div * _P_VAL) * (_ri / 1000)) / _R_VAL; // Finally, calculate and store the value for A reg1[3] |= (prediv - (div*_P_VAL)) & 0x7f; #undef _R_VAL #undef _P_VAL #undef _ri 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); return 0; } static int tua6100_get_frequency(struct dvb_frontend *fe, u32 *frequency) { struct tua6100_priv *priv = fe->tuner_priv; *frequency = priv->frequency; return 0; } static const struct dvb_tuner_ops tua6100_tuner_ops = { .info = { .name = "Infineon TUA6100", .frequency_min_hz = 950 * MHz, .frequency_max_hz = 2150 * MHz, .frequency_step_hz = 1 * MHz, }, .release = tua6100_release, .sleep = tua6100_sleep, .set_params = tua6100_set_params, .get_frequency = tua6100_get_frequency, }; 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; 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; priv = kzalloc(sizeof(struct tua6100_priv), GFP_KERNEL); if (priv == NULL) return NULL; priv->i2c_address = addr; priv->i2c = i2c; memcpy(&fe->ops.tuner_ops, &tua6100_tuner_ops, sizeof(struct dvb_tuner_ops)); fe->tuner_priv = priv; return fe; } EXPORT_SYMBOL_GPL(tua6100_attach); MODULE_DESCRIPTION("DVB tua6100 driver"); MODULE_AUTHOR("Andrew de Quincey"); MODULE_LICENSE("GPL"); |