brintos

brintos / linux-shallow public Read only

0
0
Text · 4.7 KiB · 41dd9b6 Raw
194 lines · c
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