linux/drivers/media/tuners/fc2580_priv.h
Antti Palosaari 8845cc6415 [media] fc2580: fix tuning failure on 32-bit arch
There was some frequency calculation overflows which caused tuning
failure on 32-bit architecture. Use 64-bit numbers where needed in
order to avoid calculation overflows.

Thanks for the Finnish person, who asked remain anonymous, reporting,
testing and suggesting the fix.

Cc: <stable@vger.kernel.org>
Signed-off-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
2014-04-16 18:13:11 -03:00

136 lines
3.2 KiB
C

/*
* FCI FC2580 silicon tuner driver
*
* Copyright (C) 2012 Antti Palosaari <crope@iki.fi>
*
* 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.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#ifndef FC2580_PRIV_H
#define FC2580_PRIV_H
#include "fc2580.h"
#include <linux/math64.h>
struct fc2580_reg_val {
u8 reg;
u8 val;
};
static const struct fc2580_reg_val fc2580_init_reg_vals[] = {
{0x00, 0x00},
{0x12, 0x86},
{0x14, 0x5c},
{0x16, 0x3c},
{0x1f, 0xd2},
{0x09, 0xd7},
{0x0b, 0xd5},
{0x0c, 0x32},
{0x0e, 0x43},
{0x21, 0x0a},
{0x22, 0x82},
{0x45, 0x10},
{0x4c, 0x00},
{0x3f, 0x88},
{0x02, 0x0e},
{0x58, 0x14},
};
struct fc2580_pll {
u32 freq;
u8 div;
u8 band;
};
static const struct fc2580_pll fc2580_pll_lut[] = {
/* VCO min VCO max */
{ 400000000, 12, 0x80}, /* .......... 4800000000 */
{1000000000, 4, 0x00}, /* 1600000000 4000000000 */
{0xffffffff, 2, 0x40}, /* 2000000000 .......... */
};
struct fc2580_if_filter {
u32 freq;
u16 mul;
u8 r36_val;
u8 r39_val;
};
static const struct fc2580_if_filter fc2580_if_filter_lut[] = {
{ 6000000, 4400, 0x18, 0x00},
{ 7000000, 3910, 0x18, 0x80},
{ 8000000, 3300, 0x18, 0x80},
{0xffffffff, 3300, 0x18, 0x80},
};
struct fc2580_freq_regs {
u32 freq;
u8 r25_val;
u8 r27_val;
u8 r28_val;
u8 r29_val;
u8 r2b_val;
u8 r2c_val;
u8 r2d_val;
u8 r30_val;
u8 r44_val;
u8 r50_val;
u8 r53_val;
u8 r5f_val;
u8 r61_val;
u8 r62_val;
u8 r63_val;
u8 r67_val;
u8 r68_val;
u8 r69_val;
u8 r6a_val;
u8 r6b_val;
u8 r6c_val;
u8 r6d_val;
u8 r6e_val;
u8 r6f_val;
};
/* XXX: 0xff is used for don't-care! */
static const struct fc2580_freq_regs fc2580_freq_regs_lut[] = {
{ 400000000,
0xff, 0x77, 0x33, 0x40, 0xff, 0xff, 0xff, 0x09, 0xff, 0x8c,
0x50, 0x0f, 0x07, 0x00, 0x15, 0x03, 0x05, 0x10, 0x12, 0x08,
0x0a, 0x78, 0x32, 0x54},
{ 538000000,
0xf0, 0x77, 0x53, 0x60, 0xff, 0xff, 0xff, 0x09, 0xff, 0x8c,
0x50, 0x13, 0x07, 0x06, 0x15, 0x06, 0x08, 0x10, 0x12, 0x0b,
0x0c, 0x78, 0x32, 0x14},
{ 794000000,
0xf0, 0x77, 0x53, 0x60, 0xff, 0xff, 0xff, 0x09, 0xff, 0x8c,
0x50, 0x15, 0x03, 0x03, 0x15, 0x03, 0x05, 0x0c, 0x0e, 0x0b,
0x0c, 0x78, 0x32, 0x14},
{1000000000,
0xf0, 0x77, 0x53, 0x60, 0xff, 0xff, 0xff, 0x09, 0xff, 0x8c,
0x50, 0x15, 0x07, 0x06, 0x15, 0x07, 0x09, 0x10, 0x12, 0x0b,
0x0c, 0x78, 0x32, 0x14},
{0xffffffff,
0xff, 0xff, 0xff, 0xff, 0x70, 0x37, 0xe7, 0x09, 0x20, 0x8c,
0x50, 0x0f, 0x0f, 0x00, 0x13, 0x00, 0x02, 0x0c, 0x0e, 0x08,
0x0a, 0xa0, 0x50, 0x14},
};
struct fc2580_priv {
const struct fc2580_config *cfg;
struct i2c_adapter *i2c;
};
#endif