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linux/drivers/media/dvb-frontends/ascot2e.c
Greg Kroah-Hartman 86495af117 media: dvb: symbol fixup for dvb_attach() 
In commit 9011e49d54 ("modules: only allow symbol_get of
EXPORT_SYMBOL_GPL modules") the use of symbol_get is properly restricted
to GPL-only marked symbols.  This interacts oddly with the DVB logic
which only uses dvb_attach() to load the dvb driver which then uses
symbol_get().

Fix this up by properly marking all of the dvb_attach attach symbols as
EXPORT_SYMBOL_GPL().

Fixes: 9011e49d54 ("modules: only allow symbol_get of EXPORT_SYMBOL_GPL modules")
Cc: stable <stable@kernel.org>
Reported-by: Stefan Lippers-Hollmann <s.l-h@gmx.de>
Cc: Mauro Carvalho Chehab <mchehab@kernel.org>
Cc: Christoph Hellwig <hch@lst.de>
Cc: linux-media@vger.kernel.org
Cc: linux-modules@vger.kernel.org
Acked-by: Luis Chamberlain <mcgrof@kernel.org>
Acked-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Link: https://lore.kernel.org/r/20230908092035.3815268-2-gregkh@linuxfoundation.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2023-09-09 08:15:11 +01:00

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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* ascot2e.c
*
* Sony Ascot3E DVB-T/T2/C/C2 tuner driver
*
* Copyright 2012 Sony Corporation
* Copyright (C) 2014 NetUP Inc.
* Copyright (C) 2014 Sergey Kozlov <serjk@netup.ru>
* Copyright (C) 2014 Abylay Ospan <aospan@netup.ru>
*/
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/dvb/frontend.h>
#include <linux/types.h>
#include "ascot2e.h"
#include <media/dvb_frontend.h>
#define MAX_WRITE_REGSIZE 10
enum ascot2e_state {
STATE_UNKNOWN,
STATE_SLEEP,
STATE_ACTIVE
};
struct ascot2e_priv {
u32 frequency;
u8 i2c_address;
struct i2c_adapter *i2c;
enum ascot2e_state state;
void *set_tuner_data;
int (*set_tuner)(void *, int);
};
enum ascot2e_tv_system_t {
ASCOT2E_DTV_DVBT_5,
ASCOT2E_DTV_DVBT_6,
ASCOT2E_DTV_DVBT_7,
ASCOT2E_DTV_DVBT_8,
ASCOT2E_DTV_DVBT2_1_7,
ASCOT2E_DTV_DVBT2_5,
ASCOT2E_DTV_DVBT2_6,
ASCOT2E_DTV_DVBT2_7,
ASCOT2E_DTV_DVBT2_8,
ASCOT2E_DTV_DVBC_6,
ASCOT2E_DTV_DVBC_8,
ASCOT2E_DTV_DVBC2_6,
ASCOT2E_DTV_DVBC2_8,
ASCOT2E_DTV_UNKNOWN
};
struct ascot2e_band_sett {
u8 if_out_sel;
u8 agc_sel;
u8 mix_oll;
u8 rf_gain;
u8 if_bpf_gc;
u8 fif_offset;
u8 bw_offset;
u8 bw;
u8 rf_oldet;
u8 if_bpf_f0;
};
#define ASCOT2E_AUTO 0xff
#define ASCOT2E_OFFSET(ofs) ((u8)(ofs) & 0x1F)
#define ASCOT2E_BW_6 0x00
#define ASCOT2E_BW_7 0x01
#define ASCOT2E_BW_8 0x02
#define ASCOT2E_BW_1_7 0x03
static struct ascot2e_band_sett ascot2e_sett[] = {
{ ASCOT2E_AUTO, ASCOT2E_AUTO, 0x03, ASCOT2E_AUTO, 0x06,
ASCOT2E_OFFSET(-8), ASCOT2E_OFFSET(-6), ASCOT2E_BW_6, 0x0B, 0x00 },
{ ASCOT2E_AUTO, ASCOT2E_AUTO, 0x03, ASCOT2E_AUTO, 0x06,
ASCOT2E_OFFSET(-8), ASCOT2E_OFFSET(-6), ASCOT2E_BW_6, 0x0B, 0x00 },
{ ASCOT2E_AUTO, ASCOT2E_AUTO, 0x03, ASCOT2E_AUTO, 0x06,
ASCOT2E_OFFSET(-6), ASCOT2E_OFFSET(-4), ASCOT2E_BW_7, 0x0B, 0x00 },
{ ASCOT2E_AUTO, ASCOT2E_AUTO, 0x03, ASCOT2E_AUTO, 0x06,
ASCOT2E_OFFSET(-4), ASCOT2E_OFFSET(-2), ASCOT2E_BW_8, 0x0B, 0x00 },
{ ASCOT2E_AUTO, ASCOT2E_AUTO, 0x03, ASCOT2E_AUTO, 0x06,
ASCOT2E_OFFSET(-10), ASCOT2E_OFFSET(-16), ASCOT2E_BW_1_7, 0x0B, 0x00 },
{ ASCOT2E_AUTO, ASCOT2E_AUTO, 0x03, ASCOT2E_AUTO, 0x06,
ASCOT2E_OFFSET(-8), ASCOT2E_OFFSET(-6), ASCOT2E_BW_6, 0x0B, 0x00 },
{ ASCOT2E_AUTO, ASCOT2E_AUTO, 0x03, ASCOT2E_AUTO, 0x06,
ASCOT2E_OFFSET(-8), ASCOT2E_OFFSET(-6), ASCOT2E_BW_6, 0x0B, 0x00 },
{ ASCOT2E_AUTO, ASCOT2E_AUTO, 0x03, ASCOT2E_AUTO, 0x06,
ASCOT2E_OFFSET(-6), ASCOT2E_OFFSET(-4), ASCOT2E_BW_7, 0x0B, 0x00 },
{ ASCOT2E_AUTO, ASCOT2E_AUTO, 0x03, ASCOT2E_AUTO, 0x06,
ASCOT2E_OFFSET(-4), ASCOT2E_OFFSET(-2), ASCOT2E_BW_8, 0x0B, 0x00 },
{ ASCOT2E_AUTO, ASCOT2E_AUTO, 0x02, ASCOT2E_AUTO, 0x03,
ASCOT2E_OFFSET(-6), ASCOT2E_OFFSET(-8), ASCOT2E_BW_6, 0x09, 0x00 },
{ ASCOT2E_AUTO, ASCOT2E_AUTO, 0x02, ASCOT2E_AUTO, 0x03,
ASCOT2E_OFFSET(-2), ASCOT2E_OFFSET(-1), ASCOT2E_BW_8, 0x09, 0x00 },
{ ASCOT2E_AUTO, ASCOT2E_AUTO, 0x03, ASCOT2E_AUTO, 0x01,
ASCOT2E_OFFSET(-6), ASCOT2E_OFFSET(-4), ASCOT2E_BW_6, 0x09, 0x00 },
{ ASCOT2E_AUTO, ASCOT2E_AUTO, 0x03, ASCOT2E_AUTO, 0x01,
ASCOT2E_OFFSET(-2), ASCOT2E_OFFSET(2), ASCOT2E_BW_8, 0x09, 0x00 }
};
static void ascot2e_i2c_debug(struct ascot2e_priv *priv,
u8 reg, u8 write, const u8 *data, u32 len)
{
dev_dbg(&priv->i2c->dev, "ascot2e: I2C %s reg 0x%02x size %d\n",
(write == 0 ? "read" : "write"), reg, len);
print_hex_dump_bytes("ascot2e: I2C data: ",
DUMP_PREFIX_OFFSET, data, len);
}
static int ascot2e_write_regs(struct ascot2e_priv *priv,
u8 reg, const u8 *data, u32 len)
{
int ret;
u8 buf[MAX_WRITE_REGSIZE + 1];
struct i2c_msg msg[1] = {
{
.addr = priv->i2c_address,
.flags = 0,
.len = len + 1,
.buf = buf,
}
};
if (len + 1 > sizeof(buf)) {
dev_warn(&priv->i2c->dev,"wr reg=%04x: len=%d is too big!\n",
reg, len + 1);
return -E2BIG;
}
ascot2e_i2c_debug(priv, reg, 1, data, len);
buf[0] = reg;
memcpy(&buf[1], data, len);
ret = i2c_transfer(priv->i2c, msg, 1);
if (ret >= 0 && ret != 1)
ret = -EREMOTEIO;
if (ret < 0) {
dev_warn(&priv->i2c->dev,
"%s: i2c wr failed=%d reg=%02x len=%d\n",
KBUILD_MODNAME, ret, reg, len);
return ret;
}
return 0;
}
static int ascot2e_write_reg(struct ascot2e_priv *priv, u8 reg, u8 val)
{
u8 tmp = val; /* see gcc.gnu.org/bugzilla/show_bug.cgi?id=81715 */
return ascot2e_write_regs(priv, reg, &tmp, 1);
}
static int ascot2e_read_regs(struct ascot2e_priv *priv,
u8 reg, u8 *val, u32 len)
{
int ret;
struct i2c_msg msg[2] = {
{
.addr = priv->i2c_address,
.flags = 0,
.len = 1,
.buf = &reg,
}, {
.addr = priv->i2c_address,
.flags = I2C_M_RD,
.len = len,
.buf = val,
}
};
ret = i2c_transfer(priv->i2c, &msg[0], 1);
if (ret >= 0 && ret != 1)
ret = -EREMOTEIO;
if (ret < 0) {
dev_warn(&priv->i2c->dev,
"%s: I2C rw failed=%d addr=%02x reg=%02x\n",
KBUILD_MODNAME, ret, priv->i2c_address, reg);
return ret;
}
ret = i2c_transfer(priv->i2c, &msg[1], 1);
if (ret >= 0 && ret != 1)
ret = -EREMOTEIO;
if (ret < 0) {
dev_warn(&priv->i2c->dev,
"%s: i2c rd failed=%d addr=%02x reg=%02x\n",
KBUILD_MODNAME, ret, priv->i2c_address, reg);
return ret;
}
ascot2e_i2c_debug(priv, reg, 0, val, len);
return 0;
}
static int ascot2e_read_reg(struct ascot2e_priv *priv, u8 reg, u8 *val)
{
return ascot2e_read_regs(priv, reg, val, 1);
}
static int ascot2e_set_reg_bits(struct ascot2e_priv *priv,
u8 reg, u8 data, u8 mask)
{
int res;
u8 rdata;
if (mask != 0xff) {
res = ascot2e_read_reg(priv, reg, &rdata);
if (res != 0)
return res;
data = ((data & mask) | (rdata & (mask ^ 0xFF)));
}
return ascot2e_write_reg(priv, reg, data);
}
static int ascot2e_enter_power_save(struct ascot2e_priv *priv)
{
u8 data[2];
dev_dbg(&priv->i2c->dev, "%s()\n", __func__);
if (priv->state == STATE_SLEEP)
return 0;
data[0] = 0x00;
data[1] = 0x04;
ascot2e_write_regs(priv, 0x14, data, 2);
ascot2e_write_reg(priv, 0x50, 0x01);
priv->state = STATE_SLEEP;
return 0;
}
static int ascot2e_leave_power_save(struct ascot2e_priv *priv)
{
u8 data[2] = { 0xFB, 0x0F };
dev_dbg(&priv->i2c->dev, "%s()\n", __func__);
if (priv->state == STATE_ACTIVE)
return 0;
ascot2e_write_regs(priv, 0x14, data, 2);
ascot2e_write_reg(priv, 0x50, 0x00);
priv->state = STATE_ACTIVE;
return 0;
}
static int ascot2e_init(struct dvb_frontend *fe)
{
struct ascot2e_priv *priv = fe->tuner_priv;
dev_dbg(&priv->i2c->dev, "%s()\n", __func__);
return ascot2e_leave_power_save(priv);
}
static void ascot2e_release(struct dvb_frontend *fe)
{
struct ascot2e_priv *priv = fe->tuner_priv;
dev_dbg(&priv->i2c->dev, "%s()\n", __func__);
kfree(fe->tuner_priv);
fe->tuner_priv = NULL;
}
static int ascot2e_sleep(struct dvb_frontend *fe)
{
struct ascot2e_priv *priv = fe->tuner_priv;
dev_dbg(&priv->i2c->dev, "%s()\n", __func__);
ascot2e_enter_power_save(priv);
return 0;
}
static enum ascot2e_tv_system_t ascot2e_get_tv_system(struct dvb_frontend *fe)
{
enum ascot2e_tv_system_t system = ASCOT2E_DTV_UNKNOWN;
struct dtv_frontend_properties *p = &fe->dtv_property_cache;
struct ascot2e_priv *priv = fe->tuner_priv;
if (p->delivery_system == SYS_DVBT) {
if (p->bandwidth_hz <= 5000000)
system = ASCOT2E_DTV_DVBT_5;
else if (p->bandwidth_hz <= 6000000)
system = ASCOT2E_DTV_DVBT_6;
else if (p->bandwidth_hz <= 7000000)
system = ASCOT2E_DTV_DVBT_7;
else if (p->bandwidth_hz <= 8000000)
system = ASCOT2E_DTV_DVBT_8;
else {
system = ASCOT2E_DTV_DVBT_8;
p->bandwidth_hz = 8000000;
}
} else if (p->delivery_system == SYS_DVBT2) {
if (p->bandwidth_hz <= 5000000)
system = ASCOT2E_DTV_DVBT2_5;
else if (p->bandwidth_hz <= 6000000)
system = ASCOT2E_DTV_DVBT2_6;
else if (p->bandwidth_hz <= 7000000)
system = ASCOT2E_DTV_DVBT2_7;
else if (p->bandwidth_hz <= 8000000)
system = ASCOT2E_DTV_DVBT2_8;
else {
system = ASCOT2E_DTV_DVBT2_8;
p->bandwidth_hz = 8000000;
}
} else if (p->delivery_system == SYS_DVBC_ANNEX_A) {
if (p->bandwidth_hz <= 6000000)
system = ASCOT2E_DTV_DVBC_6;
else if (p->bandwidth_hz <= 8000000)
system = ASCOT2E_DTV_DVBC_8;
}
dev_dbg(&priv->i2c->dev,
"%s(): ASCOT2E DTV system %d (delsys %d, bandwidth %d)\n",
__func__, (int)system, p->delivery_system, p->bandwidth_hz);
return system;
}
static int ascot2e_set_params(struct dvb_frontend *fe)
{
u8 data[10];
u32 frequency;
enum ascot2e_tv_system_t tv_system;
struct dtv_frontend_properties *p = &fe->dtv_property_cache;
struct ascot2e_priv *priv = fe->tuner_priv;
dev_dbg(&priv->i2c->dev, "%s(): tune frequency %dkHz\n",
__func__, p->frequency / 1000);
tv_system = ascot2e_get_tv_system(fe);
if (tv_system == ASCOT2E_DTV_UNKNOWN) {
dev_dbg(&priv->i2c->dev, "%s(): unknown DTV system\n",
__func__);
return -EINVAL;
}
if (priv->set_tuner)
priv->set_tuner(priv->set_tuner_data, 1);
frequency = roundup(p->frequency / 1000, 25);
if (priv->state == STATE_SLEEP)
ascot2e_leave_power_save(priv);
/* IF_OUT_SEL / AGC_SEL setting */
data[0] = 0x00;
if (ascot2e_sett[tv_system].agc_sel != ASCOT2E_AUTO) {
/* AGC pin setting from parameter table */
data[0] |= (u8)(
(ascot2e_sett[tv_system].agc_sel & 0x03) << 3);
}
if (ascot2e_sett[tv_system].if_out_sel != ASCOT2E_AUTO) {
/* IFOUT pin setting from parameter table */
data[0] |= (u8)(
(ascot2e_sett[tv_system].if_out_sel & 0x01) << 2);
}
/* Set bit[4:2] only */
ascot2e_set_reg_bits(priv, 0x05, data[0], 0x1c);
/* 0x06 - 0x0F */
/* REF_R setting (0x06) */
if (tv_system == ASCOT2E_DTV_DVBC_6 ||
tv_system == ASCOT2E_DTV_DVBC_8) {
/* xtal, xtal*2 */
data[0] = (frequency > 500000) ? 16 : 32;
} else {
/* xtal/8, xtal/4 */
data[0] = (frequency > 500000) ? 2 : 4;
}
/* XOSC_SEL=100uA */
data[1] = 0x04;
/* KBW setting (0x08), KC0 setting (0x09), KC1 setting (0x0A) */
if (tv_system == ASCOT2E_DTV_DVBC_6 ||
tv_system == ASCOT2E_DTV_DVBC_8) {
data[2] = 18;
data[3] = 120;
data[4] = 20;
} else {
data[2] = 48;
data[3] = 10;
data[4] = 30;
}
/* ORDER/R2_RANGE/R2_BANK/C2_BANK setting (0x0B) */
if (tv_system == ASCOT2E_DTV_DVBC_6 ||
tv_system == ASCOT2E_DTV_DVBC_8)
data[5] = (frequency > 500000) ? 0x08 : 0x0c;
else
data[5] = (frequency > 500000) ? 0x30 : 0x38;
/* Set MIX_OLL (0x0C) value from parameter table */
data[6] = ascot2e_sett[tv_system].mix_oll;
/* Set RF_GAIN (0x0D) setting from parameter table */
if (ascot2e_sett[tv_system].rf_gain == ASCOT2E_AUTO) {
/* RF_GAIN auto control enable */
ascot2e_write_reg(priv, 0x4E, 0x01);
/* RF_GAIN Default value */
data[7] = 0x00;
} else {
/* RF_GAIN auto control disable */
ascot2e_write_reg(priv, 0x4E, 0x00);
data[7] = ascot2e_sett[tv_system].rf_gain;
}
/* Set IF_BPF_GC/FIF_OFFSET (0x0E) value from parameter table */
data[8] = (u8)((ascot2e_sett[tv_system].fif_offset << 3) |
(ascot2e_sett[tv_system].if_bpf_gc & 0x07));
/* Set BW_OFFSET (0x0F) value from parameter table */
data[9] = ascot2e_sett[tv_system].bw_offset;
ascot2e_write_regs(priv, 0x06, data, 10);
/*
* 0x45 - 0x47
* LNA optimization setting
* RF_LNA_DIST1-5, RF_LNA_CM
*/
if (tv_system == ASCOT2E_DTV_DVBC_6 ||
tv_system == ASCOT2E_DTV_DVBC_8) {
data[0] = 0x0F;
data[1] = 0x00;
data[2] = 0x01;
} else {
data[0] = 0x0F;
data[1] = 0x00;
data[2] = 0x03;
}
ascot2e_write_regs(priv, 0x45, data, 3);
/* 0x49 - 0x4A
Set RF_OLDET_ENX/RF_OLDET_OLL value from parameter table */
data[0] = ascot2e_sett[tv_system].rf_oldet;
/* Set IF_BPF_F0 value from parameter table */
data[1] = ascot2e_sett[tv_system].if_bpf_f0;
ascot2e_write_regs(priv, 0x49, data, 2);
/*
* Tune now
* RFAGC fast mode / RFAGC auto control enable
* (set bit[7], bit[5:4] only)
* vco_cal = 1, set MIX_OL_CPU_EN
*/
ascot2e_set_reg_bits(priv, 0x0c, 0x90, 0xb0);
/* Logic wake up, CPU wake up */
data[0] = 0xc4;
data[1] = 0x40;
ascot2e_write_regs(priv, 0x03, data, 2);
/* 0x10 - 0x14 */
data[0] = (u8)(frequency & 0xFF); /* 0x10: FRF_L */
data[1] = (u8)((frequency >> 8) & 0xFF); /* 0x11: FRF_M */
data[2] = (u8)((frequency >> 16) & 0x0F); /* 0x12: FRF_H (bit[3:0]) */
/* 0x12: BW (bit[5:4]) */
data[2] |= (u8)(ascot2e_sett[tv_system].bw << 4);
data[3] = 0xFF; /* 0x13: VCO calibration enable */
data[4] = 0xFF; /* 0x14: Analog block enable */
/* Tune (Burst write) */
ascot2e_write_regs(priv, 0x10, data, 5);
msleep(50);
/* CPU deep sleep */
ascot2e_write_reg(priv, 0x04, 0x00);
/* Logic sleep */
ascot2e_write_reg(priv, 0x03, 0xC0);
/* RFAGC normal mode (set bit[5:4] only) */
ascot2e_set_reg_bits(priv, 0x0C, 0x00, 0x30);
priv->frequency = frequency;
return 0;
}
static int ascot2e_get_frequency(struct dvb_frontend *fe, u32 *frequency)
{
struct ascot2e_priv *priv = fe->tuner_priv;
*frequency = priv->frequency * 1000;
return 0;
}
static const struct dvb_tuner_ops ascot2e_tuner_ops = {
.info = {
.name = "Sony ASCOT2E",
.frequency_min_hz = 1 * MHz,
.frequency_max_hz = 1200 * MHz,
.frequency_step_hz = 25 * kHz,
},
.init = ascot2e_init,
.release = ascot2e_release,
.sleep = ascot2e_sleep,
.set_params = ascot2e_set_params,
.get_frequency = ascot2e_get_frequency,
};
struct dvb_frontend *ascot2e_attach(struct dvb_frontend *fe,
const struct ascot2e_config *config,
struct i2c_adapter *i2c)
{
u8 data[4];
struct ascot2e_priv *priv = NULL;
priv = kzalloc(sizeof(struct ascot2e_priv), GFP_KERNEL);
if (priv == NULL)
return NULL;
priv->i2c_address = (config->i2c_address >> 1);
priv->i2c = i2c;
priv->set_tuner_data = config->set_tuner_priv;
priv->set_tuner = config->set_tuner_callback;
if (fe->ops.i2c_gate_ctrl)
fe->ops.i2c_gate_ctrl(fe, 1);
/* 16 MHz xTal frequency */
data[0] = 16;
/* VCO current setting */
data[1] = 0x06;
/* Logic wake up, CPU boot */
data[2] = 0xC4;
data[3] = 0x40;
ascot2e_write_regs(priv, 0x01, data, 4);
/* RFVGA optimization setting (RF_DIST0 - RF_DIST2) */
data[0] = 0x10;
data[1] = 0x3F;
data[2] = 0x25;
ascot2e_write_regs(priv, 0x22, data, 3);
/* PLL mode setting */
ascot2e_write_reg(priv, 0x28, 0x1e);
/* RSSI setting */
ascot2e_write_reg(priv, 0x59, 0x04);
/* TODO check CPU HW error state here */
msleep(80);
/* Xtal oscillator current control setting */
ascot2e_write_reg(priv, 0x4c, 0x01);
/* XOSC_SEL=100uA */
ascot2e_write_reg(priv, 0x07, 0x04);
/* CPU deep sleep */
ascot2e_write_reg(priv, 0x04, 0x00);
/* Logic sleep */
ascot2e_write_reg(priv, 0x03, 0xc0);
/* Power save setting */
data[0] = 0x00;
data[1] = 0x04;
ascot2e_write_regs(priv, 0x14, data, 2);
ascot2e_write_reg(priv, 0x50, 0x01);
priv->state = STATE_SLEEP;
if (fe->ops.i2c_gate_ctrl)
fe->ops.i2c_gate_ctrl(fe, 0);
memcpy(&fe->ops.tuner_ops, &ascot2e_tuner_ops,
sizeof(struct dvb_tuner_ops));
fe->tuner_priv = priv;
dev_info(&priv->i2c->dev,
"Sony ASCOT2E attached on addr=%x at I2C adapter %p\n",
priv->i2c_address, priv->i2c);
return fe;
}
EXPORT_SYMBOL_GPL(ascot2e_attach);
MODULE_DESCRIPTION("Sony ASCOT2E terr/cab tuner driver");
MODULE_AUTHOR("info@netup.ru");
MODULE_LICENSE("GPL");
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