cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
Log | Files | Refs | README | LICENSE | sfeed.txt

netup-init.c (2158B)

      1// SPDX-License-Identifier: GPL-2.0-or-later
      2/*
      3 * netup-init.c
      4 *
      5 * NetUP Dual DVB-S2 CI driver
      6 *
      7 * Copyright (C) 2009 NetUP Inc.
      8 * Copyright (C) 2009 Igor M. Liplianin <liplianin@netup.ru>
      9 * Copyright (C) 2009 Abylay Ospan <aospan@netup.ru>
     10 */
     11
     12#include "cx23885.h"
     13#include "netup-init.h"
     14
     15static void i2c_av_write(struct i2c_adapter *i2c, u16 reg, u8 val)
     16{
     17	int ret;
     18	u8 buf[3];
     19	struct i2c_msg msg = {
     20		.addr	= 0x88 >> 1,
     21		.flags	= 0,
     22		.buf	= buf,
     23		.len	= 3
     24	};
     25
     26	buf[0] = reg >> 8;
     27	buf[1] = reg & 0xff;
     28	buf[2] = val;
     29
     30	ret = i2c_transfer(i2c, &msg, 1);
     31
     32	if (ret != 1)
     33		pr_err("%s: i2c write error!\n", __func__);
     34}
     35
     36static void i2c_av_write4(struct i2c_adapter *i2c, u16 reg, u32 val)
     37{
     38	int ret;
     39	u8 buf[6];
     40	struct i2c_msg msg = {
     41		.addr	= 0x88 >> 1,
     42		.flags	= 0,
     43		.buf	= buf,
     44		.len	= 6
     45	};
     46
     47	buf[0] = reg >> 8;
     48	buf[1] = reg & 0xff;
     49	buf[2] = val & 0xff;
     50	buf[3] = (val >> 8) & 0xff;
     51	buf[4] = (val >> 16) & 0xff;
     52	buf[5] = val >> 24;
     53
     54	ret = i2c_transfer(i2c, &msg, 1);
     55
     56	if (ret != 1)
     57		pr_err("%s: i2c write error!\n", __func__);
     58}
     59
     60static u8 i2c_av_read(struct i2c_adapter *i2c, u16 reg)
     61{
     62	int ret;
     63	u8 buf[2];
     64	struct i2c_msg msg = {
     65		.addr	= 0x88 >> 1,
     66		.flags	= 0,
     67		.buf	= buf,
     68		.len	= 2
     69	};
     70
     71	buf[0] = reg >> 8;
     72	buf[1] = reg & 0xff;
     73
     74	ret = i2c_transfer(i2c, &msg, 1);
     75
     76	if (ret != 1)
     77		pr_err("%s: i2c write error!\n", __func__);
     78
     79	msg.flags = I2C_M_RD;
     80	msg.len = 1;
     81
     82	ret = i2c_transfer(i2c, &msg, 1);
     83
     84	if (ret != 1)
     85		pr_err("%s: i2c read error!\n", __func__);
     86
     87	return buf[0];
     88}
     89
     90static void i2c_av_and_or(struct i2c_adapter *i2c, u16 reg, unsigned and_mask,
     91								u8 or_value)
     92{
     93	i2c_av_write(i2c, reg, (i2c_av_read(i2c, reg) & and_mask) | or_value);
     94}
     95/* set 27MHz on AUX_CLK */
     96void netup_initialize(struct cx23885_dev *dev)
     97{
     98	struct cx23885_i2c *i2c_bus = &dev->i2c_bus[2];
     99	struct i2c_adapter *i2c = &i2c_bus->i2c_adap;
    100
    101	/* Stop microcontroller */
    102	i2c_av_and_or(i2c, 0x803, ~0x10, 0x00);
    103
    104	/* Aux PLL frac for 27 MHz */
    105	i2c_av_write4(i2c, 0x114, 0xea0eb3);
    106
    107	/* Aux PLL int for 27 MHz */
    108	i2c_av_write4(i2c, 0x110, 0x090319);
    109
    110	/* start microcontroller */
    111	i2c_av_and_or(i2c, 0x803, ~0x10, 0x10);
    112}