Release 4.7 drivers/media/tuners/max2165.c

Directory: drivers/media/tuners
/*
 *  Driver for Maxim MAX2165 silicon tuner
 *
 *  Copyright (c) 2009 David T. L. Wong <davidtlwong@gmail.com>
 *
 *  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.
 */

#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/videodev2.h>
#include <linux/delay.h>
#include <linux/dvb/frontend.h>
#include <linux/i2c.h>
#include <linux/slab.h>

#include "dvb_frontend.h"

#include "max2165.h"
#include "max2165_priv.h"
#include "tuner-i2c.h"


#define dprintk(args...) \
	do { \
                if (debug) \
                        printk(KERN_DEBUG "max2165: " args); \
        } while (0)


static int debug;
module_param(debug, int, 0644);
MODULE_PARM_DESC(debug, "Turn on/off debugging (default:off).");



static int max2165_write_reg(struct max2165_priv *priv, u8 reg, u8 data)
{
	int ret;
	u8 buf[] = { reg, data };
	struct i2c_msg msg = { .flags = 0, .buf = buf, .len = 2 };

	msg.addr = priv->config->i2c_address;

	if (debug >= 2)
		dprintk("%s: reg=0x%02X, data=0x%02X\n", __func__, reg, data);

	ret = i2c_transfer(priv->i2c, &msg, 1);

	if (ret != 1)
		dprintk("%s: error reg=0x%x, data=0x%x, ret=%i\n",
			__func__, reg, data, ret);

	return (ret != 1) ? -EIO : 0;
}

Contributors
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david wong david wong 122 99.19% 1 50.00%
joe perches joe perches 1 0.81% 1 50.00%
Total 123 100.00% 2 100.00%



static int max2165_read_reg(struct max2165_priv *priv, u8 reg, u8 *p_data)
{
	int ret;
	u8 dev_addr = priv->config->i2c_address;

	u8 b0[] = { reg };
	u8 b1[] = { 0 };
	struct i2c_msg msg[] = {
		{ .addr = dev_addr, .flags = 0, .buf = b0, .len = 1 },
		{ .addr = dev_addr, .flags = I2C_M_RD, .buf = b1, .len = 1 },
        };

	ret = i2c_transfer(priv->i2c, msg, 2);
	if (ret != 2) {
		dprintk("%s: error reg=0x%x, ret=%i\n", __func__, reg, ret);
		return -EIO;
	}

	*p_data = b1[0];
	if (debug >= 2)
		dprintk("%s: reg=0x%02X, data=0x%02X\n",
			__func__, reg, b1[0]);
	return 0;
}

Contributors
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david wong david wong 163 99.39% 1 50.00%
joe perches joe perches 1 0.61% 1 50.00%
Total 164 100.00% 2 100.00%



static int max2165_mask_write_reg(struct max2165_priv *priv, u8 reg,
	u8 mask, u8 data)
{
	int ret;
	u8 v;

	data &= mask;
	ret = max2165_read_reg(priv, reg, &v);
	if (ret != 0)
		return ret;
	v &= ~mask;
	v |= data;
	ret = max2165_write_reg(priv, reg, v);

	return ret;
}

Contributors
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david wong david wong 74 100.00% 1 100.00%
Total 74 100.00% 1 100.00%



static int max2165_read_rom_table(struct max2165_priv *priv)
{
	u8 dat[3];
	int i;

	for (i = 0; i < 3; i++) {
		max2165_write_reg(priv, REG_ROM_TABLE_ADDR, i + 1);
		max2165_read_reg(priv, REG_ROM_TABLE_DATA, &dat[i]);
	}

	priv->tf_ntch_low_cfg = dat[0] >> 4;
	priv->tf_ntch_hi_cfg = dat[0] & 0x0F;
	priv->tf_balun_low_ref = dat[1] & 0x0F;
	priv->tf_balun_hi_ref = dat[1] >> 4;
	priv->bb_filter_7mhz_cfg = dat[2] & 0x0F;
	priv->bb_filter_8mhz_cfg = dat[2] >> 4;

	dprintk("tf_ntch_low_cfg = 0x%X\n", priv->tf_ntch_low_cfg);
	dprintk("tf_ntch_hi_cfg = 0x%X\n", priv->tf_ntch_hi_cfg);
	dprintk("tf_balun_low_ref = 0x%X\n", priv->tf_balun_low_ref);
	dprintk("tf_balun_hi_ref = 0x%X\n", priv->tf_balun_hi_ref);
	dprintk("bb_filter_7mhz_cfg = 0x%X\n", priv->bb_filter_7mhz_cfg);
	dprintk("bb_filter_8mhz_cfg = 0x%X\n", priv->bb_filter_8mhz_cfg);

	return 0;
}

Contributors
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david wong david wong 182 100.00% 1 100.00%
Total 182 100.00% 1 100.00%



static int max2165_set_osc(struct max2165_priv *priv, u8 osc /*MHz*/)
{
	u8 v;

	v = (osc / 2);
	if (v == 2)
		v = 0x7;
	else
		v -= 8;

	max2165_mask_write_reg(priv, REG_PLL_CFG, 0x07, v);

	return 0;
}

Contributors
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david wong david wong 55 100.00% 1 100.00%
Total 55 100.00% 1 100.00%



static int max2165_set_bandwidth(struct max2165_priv *priv, u32 bw)
{
	u8 val;

	if (bw == 8000000)
		val = priv->bb_filter_8mhz_cfg;
	else
		val = priv->bb_filter_7mhz_cfg;

	max2165_mask_write_reg(priv, REG_BASEBAND_CTRL, 0xF0, val << 4);

	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
david wong david wong 51 98.08% 1 50.00%
mauro carvalho chehab mauro carvalho chehab 1 1.92% 1 50.00%
Total 52 100.00% 2 100.00%



static int fixpt_div32(u32 dividend, u32 divisor, u32 *quotient, u32 *fraction)
{
	u32 remainder;
	u32 q, f = 0;
	int i;

	if (0 == divisor)
		return -EINVAL;

	q = dividend / divisor;
	remainder = dividend - q * divisor;

	for (i = 0; i < 31; i++) {
		remainder <<= 1;
		if (remainder >= divisor) {
			f += 1;
			remainder -= divisor;
		}
		f <<= 1;
	}

	*quotient = q;
	*fraction = f;

	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
david wong david wong 107 98.17% 1 33.33%
danny kukawka danny kukawka 1 0.92% 1 33.33%
mauro carvalho chehab mauro carvalho chehab 1 0.92% 1 33.33%
Total 109 100.00% 3 100.00%



static int max2165_set_rf(struct max2165_priv *priv, u32 freq)
{
	u8 tf;
	u8 tf_ntch;
	u32 t;
	u32 quotient, fraction;
	int ret;

	/* Set PLL divider according to RF frequency */
	ret = fixpt_div32(freq / 1000, priv->config->osc_clk * 1000,
			 &quotient, &fraction);
	if (ret != 0)
		return ret;

	/* 20-bit fraction */
	fraction >>= 12;

	max2165_write_reg(priv, REG_NDIV_INT, quotient);
	max2165_mask_write_reg(priv, REG_NDIV_FRAC2, 0x0F, fraction >> 16);
	max2165_write_reg(priv, REG_NDIV_FRAC1, fraction >> 8);
	max2165_write_reg(priv, REG_NDIV_FRAC0, fraction);

	/* Norch Filter */
	tf_ntch = (freq < 725000000) ?
		priv->tf_ntch_low_cfg : priv->tf_ntch_hi_cfg;

	/* Tracking filter balun */
	t = priv->tf_balun_low_ref;
	t += (priv->tf_balun_hi_ref - priv->tf_balun_low_ref)
		* (freq / 1000 - 470000) / (780000 - 470000);

	tf = t;
	dprintk("tf = %X\n", tf);
	tf |= tf_ntch << 4;

	max2165_write_reg(priv, REG_TRACK_FILTER, tf);

	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
david wong david wong 176 92.63% 2 66.67%
danny kukawka danny kukawka 14 7.37% 1 33.33%
Total 190 100.00% 3 100.00%



static void max2165_debug_status(struct max2165_priv *priv)
{
	u8 status, autotune;
	u8 auto_vco_success, auto_vco_active;
	u8 pll_locked;
	u8 dc_offset_low, dc_offset_hi;
	u8 signal_lv_over_threshold;
	u8 vco, vco_sub_band, adc;

	max2165_read_reg(priv, REG_STATUS, &status);
	max2165_read_reg(priv, REG_AUTOTUNE, &autotune);

	auto_vco_success = (status >> 6) & 0x01;
	auto_vco_active = (status >> 5) & 0x01;
	pll_locked = (status >> 4) & 0x01;
	dc_offset_low = (status >> 3) & 0x01;
	dc_offset_hi = (status >> 2) & 0x01;
	signal_lv_over_threshold = status & 0x01;

	vco = autotune >> 6;
	vco_sub_band = (autotune >> 3) & 0x7;
	adc = autotune & 0x7;

	dprintk("auto VCO active: %d, auto VCO success: %d\n",
		auto_vco_active, auto_vco_success);
	dprintk("PLL locked: %d\n", pll_locked);
	dprintk("DC offset low: %d, DC offset high: %d\n",
		dc_offset_low, dc_offset_hi);
	dprintk("Signal lvl over threshold: %d\n", signal_lv_over_threshold);
	dprintk("VCO: %d, VCO Sub-band: %d, ADC: %d\n", vco, vco_sub_band, adc);
}

Contributors
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david wong david wong 180 100.00% 1 100.00%
Total 180 100.00% 1 100.00%



static int max2165_set_params(struct dvb_frontend *fe)
{
	struct max2165_priv *priv = fe->tuner_priv;
	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
	int ret;

	switch (c->bandwidth_hz) {
	case 7000000:
	case 8000000:
		priv->frequency = c->frequency;
		break;
	default:
		printk(KERN_INFO "MAX2165: bandwidth %d Hz not supported.\n",
		       c->bandwidth_hz);
		return -EINVAL;
	}

	dprintk("%s() frequency=%d\n", __func__, c->frequency);

	if (fe->ops.i2c_gate_ctrl)
		fe->ops.i2c_gate_ctrl(fe, 1);
	max2165_set_bandwidth(priv, c->bandwidth_hz);
	ret = max2165_set_rf(priv, priv->frequency);
	mdelay(50);
	max2165_debug_status(priv);
	if (fe->ops.i2c_gate_ctrl)
		fe->ops.i2c_gate_ctrl(fe, 0);

	if (ret != 0)
		return -EREMOTEIO;

	return 0;
}

Contributors
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david wong david wong 139 85.28% 1 50.00%
mauro carvalho chehab mauro carvalho chehab 24 14.72% 1 50.00%
Total 163 100.00% 2 100.00%



static int max2165_get_frequency(struct dvb_frontend *fe, u32 *freq)
{
	struct max2165_priv *priv = fe->tuner_priv;
	dprintk("%s()\n", __func__);
	*freq = priv->frequency;
	return 0;
}

Contributors
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david wong david wong 41 100.00% 1 100.00%
Total 41 100.00% 1 100.00%



static int max2165_get_bandwidth(struct dvb_frontend *fe, u32 *bw)
{
	struct max2165_priv *priv = fe->tuner_priv;
	dprintk("%s()\n", __func__);

	*bw = priv->bandwidth;
	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
david wong david wong 41 100.00% 1 100.00%
Total 41 100.00% 1 100.00%



static int max2165_get_status(struct dvb_frontend *fe, u32 *status)
{
	struct max2165_priv *priv = fe->tuner_priv;
	u16 lock_status = 0;

	dprintk("%s()\n", __func__);

	if (fe->ops.i2c_gate_ctrl)
			fe->ops.i2c_gate_ctrl(fe, 1);

	max2165_debug_status(priv);
	*status = lock_status;

	if (fe->ops.i2c_gate_ctrl)
			fe->ops.i2c_gate_ctrl(fe, 0);

	return 0;
}

Contributors
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david wong david wong 87 100.00% 1 100.00%
Total 87 100.00% 1 100.00%



static int max2165_sleep(struct dvb_frontend *fe)
{
	dprintk("%s()\n", __func__);
	return 0;
}

Contributors
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david wong david wong 21 100.00% 1 100.00%
Total 21 100.00% 1 100.00%



static int max2165_init(struct dvb_frontend *fe)
{
	struct max2165_priv *priv = fe->tuner_priv;
	dprintk("%s()\n", __func__);

	if (fe->ops.i2c_gate_ctrl)
		fe->ops.i2c_gate_ctrl(fe, 1);

	/* Setup initial values */
	/* Fractional Mode on */
	max2165_write_reg(priv, REG_NDIV_FRAC2, 0x18);
	/* LNA on */
	max2165_write_reg(priv, REG_LNA, 0x01);
	max2165_write_reg(priv, REG_PLL_CFG, 0x7A);
	max2165_write_reg(priv, REG_TEST, 0x08);
	max2165_write_reg(priv, REG_SHUTDOWN, 0x40);
	max2165_write_reg(priv, REG_VCO_CTRL, 0x84);
	max2165_write_reg(priv, REG_BASEBAND_CTRL, 0xC3);
	max2165_write_reg(priv, REG_DC_OFFSET_CTRL, 0x75);
	max2165_write_reg(priv, REG_DC_OFFSET_DAC, 0x00);
	max2165_write_reg(priv, REG_ROM_TABLE_ADDR, 0x00);

	max2165_set_osc(priv, priv->config->osc_clk);

	max2165_read_rom_table(priv);

	max2165_set_bandwidth(priv, 8000000);

	if (fe->ops.i2c_gate_ctrl)
			fe->ops.i2c_gate_ctrl(fe, 0);

	return 0;
}

Contributors
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david wong david wong 183 99.46% 1 50.00%
mauro carvalho chehab mauro carvalho chehab 1 0.54% 1 50.00%
Total 184 100.00% 2 100.00%



static int max2165_release(struct dvb_frontend *fe)
{
	struct max2165_priv *priv = fe->tuner_priv;
	dprintk("%s()\n", __func__);

	kfree(priv);
	fe->tuner_priv = NULL;

	return 0;
}

Contributors
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david wong david wong 41 100.00% 1 100.00%
Total 41 100.00% 1 100.00%


static const struct dvb_tuner_ops max2165_tuner_ops = {
	.info = {
		.name           = "Maxim MAX2165",
		.frequency_min  = 470000000,
		.frequency_max  = 862000000,
		.frequency_step =     50000,
        },

	.release	   = max2165_release,
	.init		   = max2165_init,
	.sleep		   = max2165_sleep,

	.set_params	   = max2165_set_params,
	.set_analog_params = NULL,
	.get_frequency	   = max2165_get_frequency,
	.get_bandwidth	   = max2165_get_bandwidth,
	.get_status	   = max2165_get_status
};



struct dvb_frontend *max2165_attach(struct dvb_frontend *fe,
				   struct i2c_adapter *i2c,
				   struct max2165_config *cfg)
{
	struct max2165_priv *priv = NULL;

	dprintk("%s(%d-%04x)\n", __func__,
		i2c ? i2c_adapter_id(i2c) : -1,
		cfg ? cfg->i2c_address : -1);

	priv = kzalloc(sizeof(struct max2165_priv), GFP_KERNEL);
	if (priv == NULL)
		return NULL;

	memcpy(&fe->ops.tuner_ops, &max2165_tuner_ops,
		sizeof(struct dvb_tuner_ops));

	priv->config = cfg;
	priv->i2c = i2c;
	fe->tuner_priv = priv;

	max2165_init(fe);
	max2165_debug_status(priv);

	return fe;
}
Contributors
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david wong david wong 127 100.00% 1 100.00%
Total 127 100.00% 1 100.00%


EXPORT_SYMBOL(max2165_attach);

MODULE_AUTHOR("David T. L. Wong <davidtlwong@gmail.com>");
MODULE_DESCRIPTION("Maxim MAX2165 silicon tuner driver");
MODULE_LICENSE("GPL");
Overall Contributors
Person Tokens Prop Commits CommitProp
david wong david wong 1942 97.59% 2 25.00%
mauro carvalho chehab mauro carvalho chehab 27 1.36% 2 25.00%
danny kukawka danny kukawka 15 0.75% 1 12.50%
tejun heo tejun heo 3 0.15% 1 12.50%
joe perches joe perches 2 0.10% 1 12.50%
walter cheuk walter cheuk 1 0.05% 1 12.50%
Total 1990 100.00% 8 100.00%
  Directory: drivers/media/tuners

Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.
	Person	Tokens	Prop	Commits	CommitProp
david wong	david wong	122	99.19%	1	50.00%
joe perches	joe perches	1	0.81%	1	50.00%
	Total	123	100.00%	2	100.00%
cregit-Linux how code gets into the kernel

Release 4.7 drivers/media/tuners/max2165.c

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