LXR linux/drivers/media/pci/cx23885/netup-init.c

   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}
 113