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Based on 3 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 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 [author] [kishon] [vijay] [abraham] [i] [kishon]@[ti] [com] 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 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 [author] [graeme] [gregory] [gg]@[slimlogic] [co] [uk] [author] [kishon] [vijay] [abraham] [i] [kishon]@[ti] [com] [based] [on] [twl6030]_[usb] [c] [author] [hema] [hk] [hemahk]@[ti] [com] 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 extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 1105 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Reviewed-by: Richard Fontana <rfontana@redhat.com> Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190527070033.202006027@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
438 lines
9.9 KiB
C
438 lines
9.9 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* stv6110.c
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*
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* Driver for ST STV6110 satellite tuner IC.
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*
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* Copyright (C) 2009 NetUP Inc.
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* Copyright (C) 2009 Igor M. Liplianin <liplianin@netup.ru>
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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 <linux/types.h>
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#include "stv6110.h"
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/* Max transfer size done by I2C transfer functions */
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#define MAX_XFER_SIZE 64
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static int debug;
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struct stv6110_priv {
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int i2c_address;
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struct i2c_adapter *i2c;
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u32 mclk;
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u8 clk_div;
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u8 gain;
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u8 regs[8];
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};
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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 args); \
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} while (0)
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static s32 abssub(s32 a, s32 b)
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{
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if (a > b)
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return a - b;
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else
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return b - a;
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};
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static void stv6110_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 stv6110_write_regs(struct dvb_frontend *fe, u8 buf[],
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int start, int len)
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{
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struct stv6110_priv *priv = fe->tuner_priv;
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int rc;
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u8 cmdbuf[MAX_XFER_SIZE];
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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 = cmdbuf,
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.len = len + 1
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};
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dprintk("%s\n", __func__);
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if (1 + len > sizeof(cmdbuf)) {
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printk(KERN_WARNING
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"%s: i2c wr: len=%d is too big!\n",
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KBUILD_MODNAME, len);
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return -EINVAL;
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}
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if (start + len > 8)
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return -EINVAL;
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memcpy(&cmdbuf[1], buf, len);
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cmdbuf[0] = start;
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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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rc = i2c_transfer(priv->i2c, &msg, 1);
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if (rc != 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 0;
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}
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static int stv6110_read_regs(struct dvb_frontend *fe, u8 regs[],
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int start, int len)
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{
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struct stv6110_priv *priv = fe->tuner_priv;
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int rc;
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u8 reg[] = { start };
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struct i2c_msg msg[] = {
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{
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.addr = priv->i2c_address,
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.flags = 0,
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.buf = reg,
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.len = 1,
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}, {
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.addr = priv->i2c_address,
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.flags = I2C_M_RD,
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.buf = regs,
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.len = len,
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},
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};
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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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rc = i2c_transfer(priv->i2c, msg, 2);
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if (rc != 2)
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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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memcpy(&priv->regs[start], regs, len);
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return 0;
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}
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static int stv6110_read_reg(struct dvb_frontend *fe, int start)
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{
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u8 buf[] = { 0 };
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stv6110_read_regs(fe, buf, start, 1);
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return buf[0];
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}
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static int stv6110_sleep(struct dvb_frontend *fe)
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{
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u8 reg[] = { 0 };
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stv6110_write_regs(fe, reg, 0, 1);
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return 0;
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}
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static u32 carrier_width(u32 symbol_rate, enum fe_rolloff rolloff)
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{
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u32 rlf;
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switch (rolloff) {
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case ROLLOFF_20:
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rlf = 20;
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break;
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case ROLLOFF_25:
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rlf = 25;
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break;
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default:
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rlf = 35;
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break;
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}
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return symbol_rate + ((symbol_rate * rlf) / 100);
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}
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static int stv6110_set_bandwidth(struct dvb_frontend *fe, u32 bandwidth)
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{
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struct stv6110_priv *priv = fe->tuner_priv;
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u8 r8, ret = 0x04;
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int i;
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if ((bandwidth / 2) > 36000000) /*BW/2 max=31+5=36 mhz for r8=31*/
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r8 = 31;
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else if ((bandwidth / 2) < 5000000) /* BW/2 min=5Mhz for F=0 */
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r8 = 0;
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else /*if 5 < BW/2 < 36*/
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r8 = (bandwidth / 2) / 1000000 - 5;
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/* ctrl3, RCCLKOFF = 0 Activate the calibration Clock */
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/* ctrl3, CF = r8 Set the LPF value */
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priv->regs[RSTV6110_CTRL3] &= ~((1 << 6) | 0x1f);
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priv->regs[RSTV6110_CTRL3] |= (r8 & 0x1f);
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stv6110_write_regs(fe, &priv->regs[RSTV6110_CTRL3], RSTV6110_CTRL3, 1);
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/* stat1, CALRCSTRT = 1 Start LPF auto calibration*/
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priv->regs[RSTV6110_STAT1] |= 0x02;
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stv6110_write_regs(fe, &priv->regs[RSTV6110_STAT1], RSTV6110_STAT1, 1);
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i = 0;
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/* Wait for CALRCSTRT == 0 */
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while ((i < 10) && (ret != 0)) {
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ret = ((stv6110_read_reg(fe, RSTV6110_STAT1)) & 0x02);
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mdelay(1); /* wait for LPF auto calibration */
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i++;
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}
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/* RCCLKOFF = 1 calibration done, deactivate the calibration Clock */
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priv->regs[RSTV6110_CTRL3] |= (1 << 6);
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stv6110_write_regs(fe, &priv->regs[RSTV6110_CTRL3], RSTV6110_CTRL3, 1);
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return 0;
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}
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static int stv6110_init(struct dvb_frontend *fe)
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{
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struct stv6110_priv *priv = fe->tuner_priv;
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u8 buf0[] = { 0x07, 0x11, 0xdc, 0x85, 0x17, 0x01, 0xe6, 0x1e };
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memcpy(priv->regs, buf0, 8);
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/* K = (Reference / 1000000) - 16 */
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priv->regs[RSTV6110_CTRL1] &= ~(0x1f << 3);
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priv->regs[RSTV6110_CTRL1] |=
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((((priv->mclk / 1000000) - 16) & 0x1f) << 3);
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/* divisor value for the output clock */
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priv->regs[RSTV6110_CTRL2] &= ~0xc0;
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priv->regs[RSTV6110_CTRL2] |= (priv->clk_div << 6);
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stv6110_write_regs(fe, &priv->regs[RSTV6110_CTRL1], RSTV6110_CTRL1, 8);
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msleep(1);
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stv6110_set_bandwidth(fe, 72000000);
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return 0;
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}
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static int stv6110_get_frequency(struct dvb_frontend *fe, u32 *frequency)
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{
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struct stv6110_priv *priv = fe->tuner_priv;
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u32 nbsteps, divider, psd2, freq;
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u8 regs[] = { 0, 0, 0, 0, 0, 0, 0, 0 };
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stv6110_read_regs(fe, regs, 0, 8);
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/*N*/
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divider = (priv->regs[RSTV6110_TUNING2] & 0x0f) << 8;
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divider += priv->regs[RSTV6110_TUNING1];
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/*R*/
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nbsteps = (priv->regs[RSTV6110_TUNING2] >> 6) & 3;
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/*p*/
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psd2 = (priv->regs[RSTV6110_TUNING2] >> 4) & 1;
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freq = divider * (priv->mclk / 1000);
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freq /= (1 << (nbsteps + psd2));
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freq /= 4;
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*frequency = freq;
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return 0;
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}
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static int stv6110_set_frequency(struct dvb_frontend *fe, u32 frequency)
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{
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struct stv6110_priv *priv = fe->tuner_priv;
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u8 ret = 0x04;
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u32 divider, ref, p, presc, i, result_freq, vco_freq;
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s32 p_calc, p_calc_opt = 1000, r_div, r_div_opt = 0, p_val;
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dprintk("%s, freq=%d kHz, mclk=%d Hz\n", __func__,
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frequency, priv->mclk);
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/* K = (Reference / 1000000) - 16 */
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priv->regs[RSTV6110_CTRL1] &= ~(0x1f << 3);
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priv->regs[RSTV6110_CTRL1] |=
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((((priv->mclk / 1000000) - 16) & 0x1f) << 3);
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/* BB_GAIN = db/2 */
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priv->regs[RSTV6110_CTRL2] &= ~0x0f;
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priv->regs[RSTV6110_CTRL2] |= (priv->gain & 0x0f);
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if (frequency <= 1023000) {
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p = 1;
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presc = 0;
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} else if (frequency <= 1300000) {
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p = 1;
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presc = 1;
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} else if (frequency <= 2046000) {
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p = 0;
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presc = 0;
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} else {
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p = 0;
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presc = 1;
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}
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/* DIV4SEL = p*/
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priv->regs[RSTV6110_TUNING2] &= ~(1 << 4);
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priv->regs[RSTV6110_TUNING2] |= (p << 4);
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/* PRESC32ON = presc */
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priv->regs[RSTV6110_TUNING2] &= ~(1 << 5);
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priv->regs[RSTV6110_TUNING2] |= (presc << 5);
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p_val = (int)(1 << (p + 1)) * 10;/* P = 2 or P = 4 */
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for (r_div = 0; r_div <= 3; r_div++) {
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p_calc = (priv->mclk / 100000);
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p_calc /= (1 << (r_div + 1));
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if ((abssub(p_calc, p_val)) < (abssub(p_calc_opt, p_val)))
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r_div_opt = r_div;
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p_calc_opt = (priv->mclk / 100000);
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p_calc_opt /= (1 << (r_div_opt + 1));
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}
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ref = priv->mclk / ((1 << (r_div_opt + 1)) * (1 << (p + 1)));
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divider = (((frequency * 1000) + (ref >> 1)) / ref);
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/* RDIV = r_div_opt */
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priv->regs[RSTV6110_TUNING2] &= ~(3 << 6);
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priv->regs[RSTV6110_TUNING2] |= (((r_div_opt) & 3) << 6);
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/* NDIV_MSB = MSB(divider) */
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priv->regs[RSTV6110_TUNING2] &= ~0x0f;
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priv->regs[RSTV6110_TUNING2] |= (((divider) >> 8) & 0x0f);
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/* NDIV_LSB, LSB(divider) */
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priv->regs[RSTV6110_TUNING1] = (divider & 0xff);
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/* CALVCOSTRT = 1 VCO Auto Calibration */
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priv->regs[RSTV6110_STAT1] |= 0x04;
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stv6110_write_regs(fe, &priv->regs[RSTV6110_CTRL1],
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RSTV6110_CTRL1, 8);
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i = 0;
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/* Wait for CALVCOSTRT == 0 */
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while ((i < 10) && (ret != 0)) {
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ret = ((stv6110_read_reg(fe, RSTV6110_STAT1)) & 0x04);
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msleep(1); /* wait for VCO auto calibration */
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i++;
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}
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ret = stv6110_read_reg(fe, RSTV6110_STAT1);
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stv6110_get_frequency(fe, &result_freq);
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vco_freq = divider * ((priv->mclk / 1000) / ((1 << (r_div_opt + 1))));
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dprintk("%s, stat1=%x, lo_freq=%d kHz, vco_frec=%d kHz\n", __func__,
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ret, result_freq, vco_freq);
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return 0;
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}
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static int stv6110_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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u32 bandwidth = carrier_width(c->symbol_rate, c->rolloff);
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stv6110_set_frequency(fe, c->frequency);
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stv6110_set_bandwidth(fe, bandwidth);
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return 0;
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}
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static int stv6110_get_bandwidth(struct dvb_frontend *fe, u32 *bandwidth)
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{
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struct stv6110_priv *priv = fe->tuner_priv;
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u8 r8 = 0;
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u8 regs[] = { 0, 0, 0, 0, 0, 0, 0, 0 };
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stv6110_read_regs(fe, regs, 0, 8);
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/* CF */
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r8 = priv->regs[RSTV6110_CTRL3] & 0x1f;
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*bandwidth = (r8 + 5) * 2000000;/* x2 for ZIF tuner BW/2 = F+5 Mhz */
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return 0;
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}
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static const struct dvb_tuner_ops stv6110_tuner_ops = {
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.info = {
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.name = "ST STV6110",
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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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.init = stv6110_init,
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.release = stv6110_release,
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.sleep = stv6110_sleep,
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.set_params = stv6110_set_params,
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.get_frequency = stv6110_get_frequency,
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.set_frequency = stv6110_set_frequency,
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.get_bandwidth = stv6110_get_bandwidth,
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.set_bandwidth = stv6110_set_bandwidth,
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};
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struct dvb_frontend *stv6110_attach(struct dvb_frontend *fe,
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const struct stv6110_config *config,
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struct i2c_adapter *i2c)
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{
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struct stv6110_priv *priv = NULL;
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u8 reg0[] = { 0x00, 0x07, 0x11, 0xdc, 0x85, 0x17, 0x01, 0xe6, 0x1e };
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struct i2c_msg msg[] = {
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{
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.addr = config->i2c_address,
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.flags = 0,
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.buf = reg0,
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.len = 9
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}
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};
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int ret;
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/* divisor value for the output clock */
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reg0[2] &= ~0xc0;
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reg0[2] |= (config->clk_div << 6);
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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, 1);
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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 != 1)
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return NULL;
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priv = kzalloc(sizeof(struct stv6110_priv), GFP_KERNEL);
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if (priv == NULL)
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return NULL;
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priv->i2c_address = config->i2c_address;
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priv->i2c = i2c;
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priv->mclk = config->mclk;
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priv->clk_div = config->clk_div;
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priv->gain = config->gain;
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memcpy(&priv->regs, ®0[1], 8);
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memcpy(&fe->ops.tuner_ops, &stv6110_tuner_ops,
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sizeof(struct dvb_tuner_ops));
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fe->tuner_priv = priv;
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printk(KERN_INFO "STV6110 attached on addr=%x!\n", priv->i2c_address);
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return fe;
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}
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EXPORT_SYMBOL(stv6110_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("ST STV6110 driver");
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MODULE_AUTHOR("Igor M. Liplianin");
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MODULE_LICENSE("GPL");
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