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a6cdeeb16b
Some ISDN files that got removed in net-next had some changes done in mainline, take the removals. Signed-off-by: David S. Miller <davem@davemloft.net>
194 lines
4.7 KiB
C
194 lines
4.7 KiB
C
// 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 <michael@mihu.de>
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*
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* CI interface support (c) 2004 Olivier Gournet <ogournet@anevia.com> &
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* Andrew de Quincey <adq_dvb@lidskialf.net>
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*
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* Copyright (C) 2002 Ralph Metzler <rjkm@metzlerbros.de>
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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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