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Based on 1 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license as published by the free software foundation either version 2 of the license or at your option any later version this program is distributed in the hope that it will be useful but without any warranty without even the implied warranty of merchantability or fitness for a particular purpose see the gnu general public license for more details you should have received a copy of the gnu general public license along with this program if not write to the free software foundation inc 675 mass ave cambridge ma 02139 usa extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 441 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Michael Ellerman <mpe@ellerman.id.au> (powerpc) Reviewed-by: Richard Fontana <rfontana@redhat.com> Reviewed-by: Allison Randal <allison@lohutok.net> Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190520071858.739733335@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
243 lines
4.6 KiB
C
243 lines
4.6 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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Driver for ST STB6000 DVBS Silicon tuner
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Copyright (C) 2008 Igor M. Liplianin (liplianin@me.by)
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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 "stb6000.h"
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static int debug;
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#define dprintk(args...) \
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do { \
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if (debug) \
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printk(KERN_DEBUG "stb6000: " args); \
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} while (0)
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struct stb6000_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 stb6000_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 stb6000_sleep(struct dvb_frontend *fe)
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{
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struct stb6000_priv *priv = fe->tuner_priv;
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int ret;
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u8 buf[] = { 10, 0 };
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struct i2c_msg msg = {
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.addr = priv->i2c_address,
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.flags = 0,
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.buf = buf,
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.len = 2
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};
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dprintk("%s:\n", __func__);
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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(priv->i2c, &msg, 1);
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if (ret != 1)
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dprintk("%s: i2c error\n", __func__);
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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 stb6000_set_params(struct dvb_frontend *fe)
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{
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struct dtv_frontend_properties *p = &fe->dtv_property_cache;
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struct stb6000_priv *priv = fe->tuner_priv;
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unsigned int n, m;
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int ret;
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u32 freq_mhz;
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int bandwidth;
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u8 buf[12];
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struct i2c_msg msg = {
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.addr = priv->i2c_address,
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.flags = 0,
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.buf = buf,
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.len = 12
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};
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dprintk("%s:\n", __func__);
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freq_mhz = p->frequency / 1000;
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bandwidth = p->symbol_rate / 1000000;
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if (bandwidth > 31)
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bandwidth = 31;
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if ((freq_mhz > 949) && (freq_mhz < 2151)) {
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buf[0] = 0x01;
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buf[1] = 0xac;
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if (freq_mhz < 1950)
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buf[1] = 0xaa;
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if (freq_mhz < 1800)
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buf[1] = 0xa8;
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if (freq_mhz < 1650)
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buf[1] = 0xa6;
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if (freq_mhz < 1530)
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buf[1] = 0xa5;
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if (freq_mhz < 1470)
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buf[1] = 0xa4;
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if (freq_mhz < 1370)
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buf[1] = 0xa2;
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if (freq_mhz < 1300)
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buf[1] = 0xa1;
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if (freq_mhz < 1200)
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buf[1] = 0xa0;
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if (freq_mhz < 1075)
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buf[1] = 0xbc;
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if (freq_mhz < 1000)
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buf[1] = 0xba;
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if (freq_mhz < 1075) {
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n = freq_mhz / 8; /* vco=lo*4 */
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m = 2;
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} else {
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n = freq_mhz / 16; /* vco=lo*2 */
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m = 1;
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}
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buf[2] = n >> 1;
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buf[3] = (unsigned char)(((n & 1) << 7) |
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(m * freq_mhz - n * 16) | 0x60);
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buf[4] = 0x04;
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buf[5] = 0x0e;
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buf[6] = (unsigned char)(bandwidth);
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buf[7] = 0xd8;
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buf[8] = 0xd0;
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buf[9] = 0x50;
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buf[10] = 0xeb;
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buf[11] = 0x4f;
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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(priv->i2c, &msg, 1);
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if (ret != 1)
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dprintk("%s: i2c error\n", __func__);
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udelay(10);
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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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buf[0] = 0x07;
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buf[1] = 0xdf;
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buf[2] = 0xd0;
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buf[3] = 0x50;
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buf[4] = 0xfb;
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msg.len = 5;
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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(priv->i2c, &msg, 1);
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if (ret != 1)
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dprintk("%s: i2c error\n", __func__);
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udelay(10);
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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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priv->frequency = freq_mhz * 1000;
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return (ret == 1) ? 0 : ret;
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}
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return -1;
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}
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static int stb6000_get_frequency(struct dvb_frontend *fe, u32 *frequency)
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{
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struct stb6000_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 stb6000_tuner_ops = {
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.info = {
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.name = "ST STB6000",
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.frequency_min_hz = 950 * MHz,
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.frequency_max_hz = 2150 * MHz
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},
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.release = stb6000_release,
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.sleep = stb6000_sleep,
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.set_params = stb6000_set_params,
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.get_frequency = stb6000_get_frequency,
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};
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struct dvb_frontend *stb6000_attach(struct dvb_frontend *fe, int addr,
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struct i2c_adapter *i2c)
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{
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struct stb6000_priv *priv = NULL;
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u8 b0[] = { 0 };
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u8 b1[] = { 0, 0 };
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struct i2c_msg msg[2] = {
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{
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.addr = addr,
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.flags = 0,
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.buf = b0,
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.len = 0
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}, {
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.addr = addr,
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.flags = I2C_M_RD,
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.buf = b1,
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.len = 2
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}
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};
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int ret;
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dprintk("%s:\n", __func__);
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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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/* is some i2c device here ? */
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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 stb6000_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, &stb6000_tuner_ops,
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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(stb6000_attach);
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module_param(debug, int, 0644);
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MODULE_PARM_DESC(debug, "Turn on/off frontend debugging (default:off).");
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MODULE_DESCRIPTION("DVB STB6000 driver");
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MODULE_AUTHOR("Igor M. Liplianin <liplianin@me.by>");
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MODULE_LICENSE("GPL");
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