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linux/drivers/media/tuners/mt2131.c
Linus Torvalds bf4afc53b7 Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 
This was done entirely with mindless brute force, using

    git grep -l '\<k[vmz]*alloc_objs*(.*, GFP_KERNEL)' |
        xargs sed -i 's/\(alloc_objs*(.*\), GFP_KERNEL)/\1)/'

to convert the new alloc_obj() users that had a simple GFP_KERNEL
argument to just drop that argument.

Note that due to the extreme simplicity of the scripting, any slightly
more complex cases spread over multiple lines would not be triggered:
they definitely exist, but this covers the vast bulk of the cases, and
the resulting diff is also then easier to check automatically.

For the same reason the 'flex' versions will be done as a separate
conversion.

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2026-02-21 17:09:51 -08:00

282 lines
7.1 KiB
C
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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Driver for Microtune MT2131 "QAM/8VSB single chip tuner"
*
* Copyright (c) 2006 Steven Toth <stoth@linuxtv.org>
*/
#include <linux/module.h>
#include <linux/delay.h>
#include <linux/dvb/frontend.h>
#include <linux/i2c.h>
#include <linux/slab.h>
#include <media/dvb_frontend.h>
#include "mt2131.h"
#include "mt2131_priv.h"
static int debug;
module_param(debug, int, 0644);
MODULE_PARM_DESC(debug, "Turn on/off debugging (default:off).");
#define dprintk(level,fmt, arg...) if (debug >= level) \
printk(KERN_INFO "%s: " fmt, "mt2131", ## arg)
static u8 mt2131_config1[] = {
0x01,
0x50, 0x00, 0x50, 0x80, 0x00, 0x49, 0xfa, 0x88,
0x08, 0x77, 0x41, 0x04, 0x00, 0x00, 0x00, 0x32,
0x7f, 0xda, 0x4c, 0x00, 0x10, 0xaa, 0x78, 0x80,
0xff, 0x68, 0xa0, 0xff, 0xdd, 0x00, 0x00
};
static u8 mt2131_config2[] = {
0x10,
0x7f, 0xc8, 0x0a, 0x5f, 0x00, 0x04
};
static int mt2131_readreg(struct mt2131_priv *priv, u8 reg, u8 *val)
{
struct i2c_msg msg[2] = {
{ .addr = priv->cfg->i2c_address, .flags = 0,
.buf = &reg, .len = 1 },
{ .addr = priv->cfg->i2c_address, .flags = I2C_M_RD,
.buf = val, .len = 1 },
};
if (i2c_transfer(priv->i2c, msg, 2) != 2) {
printk(KERN_WARNING "mt2131 I2C read failed\n");
return -EREMOTEIO;
}
return 0;
}
static int mt2131_writereg(struct mt2131_priv *priv, u8 reg, u8 val)
{
u8 buf[2] = { reg, val };
struct i2c_msg msg = { .addr = priv->cfg->i2c_address, .flags = 0,
.buf = buf, .len = 2 };
if (i2c_transfer(priv->i2c, &msg, 1) != 1) {
printk(KERN_WARNING "mt2131 I2C write failed\n");
return -EREMOTEIO;
}
return 0;
}
static int mt2131_writeregs(struct mt2131_priv *priv,u8 *buf, u8 len)
{
struct i2c_msg msg = { .addr = priv->cfg->i2c_address,
.flags = 0, .buf = buf, .len = len };
if (i2c_transfer(priv->i2c, &msg, 1) != 1) {
printk(KERN_WARNING "mt2131 I2C write failed (len=%i)\n",
(int)len);
return -EREMOTEIO;
}
return 0;
}
static int mt2131_set_params(struct dvb_frontend *fe)
{
struct dtv_frontend_properties *c = &fe->dtv_property_cache;
struct mt2131_priv *priv;
int ret=0, i;
u32 freq;
u8 if_band_center;
u32 f_lo1, f_lo2;
u32 div1, num1, div2, num2;
u8 b[8];
u8 lockval = 0;
priv = fe->tuner_priv;
freq = c->frequency / 1000; /* Hz -> kHz */
dprintk(1, "%s() freq=%d\n", __func__, freq);
f_lo1 = freq + MT2131_IF1 * 1000;
f_lo1 = (f_lo1 / 250) * 250;
f_lo2 = f_lo1 - freq - MT2131_IF2;
priv->frequency = (f_lo1 - f_lo2 - MT2131_IF2) * 1000;
/* Frequency LO1 = 16MHz * (DIV1 + NUM1/8192 ) */
num1 = f_lo1 * 64 / (MT2131_FREF / 128);
div1 = num1 / 8192;
num1 &= 0x1fff;
/* Frequency LO2 = 16MHz * (DIV2 + NUM2/8192 ) */
num2 = f_lo2 * 64 / (MT2131_FREF / 128);
div2 = num2 / 8192;
num2 &= 0x1fff;
if (freq <= 82500) if_band_center = 0x00; else
if (freq <= 137500) if_band_center = 0x01; else
if (freq <= 192500) if_band_center = 0x02; else
if (freq <= 247500) if_band_center = 0x03; else
if (freq <= 302500) if_band_center = 0x04; else
if (freq <= 357500) if_band_center = 0x05; else
if (freq <= 412500) if_band_center = 0x06; else
if (freq <= 467500) if_band_center = 0x07; else
if (freq <= 522500) if_band_center = 0x08; else
if (freq <= 577500) if_band_center = 0x09; else
if (freq <= 632500) if_band_center = 0x0A; else
if (freq <= 687500) if_band_center = 0x0B; else
if (freq <= 742500) if_band_center = 0x0C; else
if (freq <= 797500) if_band_center = 0x0D; else
if (freq <= 852500) if_band_center = 0x0E; else
if (freq <= 907500) if_band_center = 0x0F; else
if (freq <= 962500) if_band_center = 0x10; else
if (freq <= 1017500) if_band_center = 0x11; else
if (freq <= 1072500) if_band_center = 0x12; else if_band_center = 0x13;
b[0] = 1;
b[1] = (num1 >> 5) & 0xFF;
b[2] = (num1 & 0x1F);
b[3] = div1;
b[4] = (num2 >> 5) & 0xFF;
b[5] = num2 & 0x1F;
b[6] = div2;
dprintk(1, "IF1: %dMHz IF2: %dMHz\n", MT2131_IF1, MT2131_IF2);
dprintk(1, "PLL freq=%dkHz band=%d\n", (int)freq, (int)if_band_center);
dprintk(1, "PLL f_lo1=%dkHz f_lo2=%dkHz\n", (int)f_lo1, (int)f_lo2);
dprintk(1, "PLL div1=%d num1=%d div2=%d num2=%d\n",
(int)div1, (int)num1, (int)div2, (int)num2);
dprintk(1, "PLL [1..6]: %2x %2x %2x %2x %2x %2x\n",
(int)b[1], (int)b[2], (int)b[3], (int)b[4], (int)b[5],
(int)b[6]);
ret = mt2131_writeregs(priv,b,7);
if (ret < 0)
return ret;
mt2131_writereg(priv, 0x0b, if_band_center);
/* Wait for lock */
i = 0;
do {
mt2131_readreg(priv, 0x08, &lockval);
if ((lockval & 0x88) == 0x88)
break;
msleep(4);
i++;
} while (i < 10);
return ret;
}
static int mt2131_get_frequency(struct dvb_frontend *fe, u32 *frequency)
{
struct mt2131_priv *priv = fe->tuner_priv;
dprintk(1, "%s()\n", __func__);
*frequency = priv->frequency;
return 0;
}
static int mt2131_get_status(struct dvb_frontend *fe, u32 *status)
{
struct mt2131_priv *priv = fe->tuner_priv;
u8 lock_status = 0;
u8 afc_status = 0;
*status = 0;
mt2131_readreg(priv, 0x08, &lock_status);
if ((lock_status & 0x88) == 0x88)
*status = TUNER_STATUS_LOCKED;
mt2131_readreg(priv, 0x09, &afc_status);
dprintk(1, "%s() - LO Status = 0x%x, AFC Status = 0x%x\n",
__func__, lock_status, afc_status);
return 0;
}
static int mt2131_init(struct dvb_frontend *fe)
{
struct mt2131_priv *priv = fe->tuner_priv;
int ret;
dprintk(1, "%s()\n", __func__);
if ((ret = mt2131_writeregs(priv, mt2131_config1,
sizeof(mt2131_config1))) < 0)
return ret;
mt2131_writereg(priv, 0x0b, 0x09);
mt2131_writereg(priv, 0x15, 0x47);
mt2131_writereg(priv, 0x07, 0xf2);
mt2131_writereg(priv, 0x0b, 0x01);
if ((ret = mt2131_writeregs(priv, mt2131_config2,
sizeof(mt2131_config2))) < 0)
return ret;
return ret;
}
static void mt2131_release(struct dvb_frontend *fe)
{
dprintk(1, "%s()\n", __func__);
kfree(fe->tuner_priv);
fe->tuner_priv = NULL;
}
static const struct dvb_tuner_ops mt2131_tuner_ops = {
.info = {
.name = "Microtune MT2131",
.frequency_min_hz = 48 * MHz,
.frequency_max_hz = 860 * MHz,
.frequency_step_hz = 50 * kHz,
},
.release = mt2131_release,
.init = mt2131_init,
.set_params = mt2131_set_params,
.get_frequency = mt2131_get_frequency,
.get_status = mt2131_get_status
};
struct dvb_frontend * mt2131_attach(struct dvb_frontend *fe,
struct i2c_adapter *i2c,
struct mt2131_config *cfg, u16 if1)
{
struct mt2131_priv *priv = NULL;
u8 id = 0;
dprintk(1, "%s()\n", __func__);
priv = kzalloc_obj(struct mt2131_priv);
if (priv == NULL)
return NULL;
priv->cfg = cfg;
priv->i2c = i2c;
if (mt2131_readreg(priv, 0, &id) != 0) {
kfree(priv);
return NULL;
}
if ( (id != 0x3E) && (id != 0x3F) ) {
printk(KERN_ERR "MT2131: Device not found at addr 0x%02x\n",
cfg->i2c_address);
kfree(priv);
return NULL;
}
printk(KERN_INFO "MT2131: successfully identified at address 0x%02x\n",
cfg->i2c_address);
memcpy(&fe->ops.tuner_ops, &mt2131_tuner_ops,
sizeof(struct dvb_tuner_ops));
fe->tuner_priv = priv;
return fe;
}
EXPORT_SYMBOL_GPL(mt2131_attach);
MODULE_AUTHOR("Steven Toth");
MODULE_DESCRIPTION("Microtune MT2131 silicon tuner driver");
MODULE_LICENSE("GPL");
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