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193 lines
4.7 KiB
193 lines
4.7 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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* Driver for Infineon tua6100 pll. |
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* |
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* (c) 2006 Andrew de Quincey |
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* |
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* Based on code found in budget-av.c, which has the following: |
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* Compiled from various sources by Michael Hunold <[email protected]> |
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* |
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* CI interface support (c) 2004 Olivier Gournet <[email protected]> & |
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* Andrew de Quincey <[email protected]> |
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* |
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* Copyright (C) 2002 Ralph Metzler <[email protected]> |
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* |
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* Copyright (C) 1999-2002 Ralph Metzler |
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* & Marcus Metzler for convergence integrated media GmbH |
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*/ |
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#include <linux/slab.h> |
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#include <linux/module.h> |
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#include <linux/dvb/frontend.h> |
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#include <asm/types.h> |
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#include "tua6100.h" |
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struct tua6100_priv { |
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/* i2c details */ |
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int i2c_address; |
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struct i2c_adapter *i2c; |
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u32 frequency; |
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}; |
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static void tua6100_release(struct dvb_frontend *fe) |
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{ |
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kfree(fe->tuner_priv); |
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fe->tuner_priv = NULL; |
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} |
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static int tua6100_sleep(struct dvb_frontend *fe) |
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{ |
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struct tua6100_priv *priv = fe->tuner_priv; |
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int ret; |
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u8 reg0[] = { 0x00, 0x00 }; |
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struct i2c_msg msg = { .addr = priv->i2c_address, .flags = 0, .buf = reg0, .len = 2 }; |
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if (fe->ops.i2c_gate_ctrl) |
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fe->ops.i2c_gate_ctrl(fe, 1); |
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if ((ret = i2c_transfer (priv->i2c, &msg, 1)) != 1) { |
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printk("%s: i2c error\n", __func__); |
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} |
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if (fe->ops.i2c_gate_ctrl) |
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fe->ops.i2c_gate_ctrl(fe, 0); |
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return (ret == 1) ? 0 : ret; |
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} |
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static int tua6100_set_params(struct dvb_frontend *fe) |
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{ |
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struct dtv_frontend_properties *c = &fe->dtv_property_cache; |
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struct tua6100_priv *priv = fe->tuner_priv; |
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u32 div; |
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u32 prediv; |
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u8 reg0[] = { 0x00, 0x00 }; |
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u8 reg1[] = { 0x01, 0x00, 0x00, 0x00 }; |
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u8 reg2[] = { 0x02, 0x00, 0x00 }; |
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struct i2c_msg msg0 = { .addr = priv->i2c_address, .flags = 0, .buf = reg0, .len = 2 }; |
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struct i2c_msg msg1 = { .addr = priv->i2c_address, .flags = 0, .buf = reg1, .len = 4 }; |
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struct i2c_msg msg2 = { .addr = priv->i2c_address, .flags = 0, .buf = reg2, .len = 3 }; |
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#define _R_VAL 4 |
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#define _P_VAL 32 |
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#define _ri 4000000 |
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// setup register 0 |
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if (c->frequency < 2000000) |
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reg0[1] = 0x03; |
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else |
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reg0[1] = 0x07; |
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// setup register 1 |
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if (c->frequency < 1630000) |
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reg1[1] = 0x2c; |
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else |
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reg1[1] = 0x0c; |
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if (_P_VAL == 64) |
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reg1[1] |= 0x40; |
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if (c->frequency >= 1525000) |
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reg1[1] |= 0x80; |
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// register 2 |
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reg2[1] = (_R_VAL >> 8) & 0x03; |
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reg2[2] = _R_VAL; |
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if (c->frequency < 1455000) |
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reg2[1] |= 0x1c; |
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else if (c->frequency < 1630000) |
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reg2[1] |= 0x0c; |
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else |
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reg2[1] |= 0x1c; |
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/* |
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* The N divisor ratio (note: c->frequency is in kHz, but we |
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* need it in Hz) |
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*/ |
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prediv = (c->frequency * _R_VAL) / (_ri / 1000); |
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div = prediv / _P_VAL; |
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reg1[1] |= (div >> 9) & 0x03; |
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reg1[2] = div >> 1; |
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reg1[3] = (div << 7); |
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priv->frequency = ((div * _P_VAL) * (_ri / 1000)) / _R_VAL; |
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// Finally, calculate and store the value for A |
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reg1[3] |= (prediv - (div*_P_VAL)) & 0x7f; |
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#undef _R_VAL |
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#undef _P_VAL |
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#undef _ri |
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if (fe->ops.i2c_gate_ctrl) |
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fe->ops.i2c_gate_ctrl(fe, 1); |
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if (i2c_transfer(priv->i2c, &msg0, 1) != 1) |
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return -EIO; |
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if (fe->ops.i2c_gate_ctrl) |
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fe->ops.i2c_gate_ctrl(fe, 1); |
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if (i2c_transfer(priv->i2c, &msg2, 1) != 1) |
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return -EIO; |
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if (fe->ops.i2c_gate_ctrl) |
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fe->ops.i2c_gate_ctrl(fe, 1); |
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if (i2c_transfer(priv->i2c, &msg1, 1) != 1) |
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return -EIO; |
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if (fe->ops.i2c_gate_ctrl) |
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fe->ops.i2c_gate_ctrl(fe, 0); |
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return 0; |
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} |
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static int tua6100_get_frequency(struct dvb_frontend *fe, u32 *frequency) |
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{ |
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struct tua6100_priv *priv = fe->tuner_priv; |
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*frequency = priv->frequency; |
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return 0; |
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} |
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static const struct dvb_tuner_ops tua6100_tuner_ops = { |
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.info = { |
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.name = "Infineon TUA6100", |
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.frequency_min_hz = 950 * MHz, |
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.frequency_max_hz = 2150 * MHz, |
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.frequency_step_hz = 1 * MHz, |
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}, |
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.release = tua6100_release, |
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.sleep = tua6100_sleep, |
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.set_params = tua6100_set_params, |
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.get_frequency = tua6100_get_frequency, |
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}; |
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struct dvb_frontend *tua6100_attach(struct dvb_frontend *fe, int addr, struct i2c_adapter *i2c) |
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{ |
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struct tua6100_priv *priv = NULL; |
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u8 b1 [] = { 0x80 }; |
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u8 b2 [] = { 0x00 }; |
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struct i2c_msg msg [] = { { .addr = addr, .flags = 0, .buf = b1, .len = 1 }, |
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{ .addr = addr, .flags = I2C_M_RD, .buf = b2, .len = 1 } }; |
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int ret; |
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if (fe->ops.i2c_gate_ctrl) |
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fe->ops.i2c_gate_ctrl(fe, 1); |
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ret = i2c_transfer (i2c, msg, 2); |
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if (fe->ops.i2c_gate_ctrl) |
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fe->ops.i2c_gate_ctrl(fe, 0); |
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if (ret != 2) |
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return NULL; |
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priv = kzalloc(sizeof(struct tua6100_priv), GFP_KERNEL); |
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if (priv == NULL) |
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return NULL; |
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priv->i2c_address = addr; |
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priv->i2c = i2c; |
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memcpy(&fe->ops.tuner_ops, &tua6100_tuner_ops, sizeof(struct dvb_tuner_ops)); |
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fe->tuner_priv = priv; |
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return fe; |
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} |
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EXPORT_SYMBOL(tua6100_attach); |
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MODULE_DESCRIPTION("DVB tua6100 driver"); |
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MODULE_AUTHOR("Andrew de Quincey"); |
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MODULE_LICENSE("GPL");
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