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

   1 /*
   2  * netup-init.c
   3  *
   4  * NetUP Dual DVB-S2 CI driver
   5  *
   6  * Copyright (C) 2009 NetUP Inc.
   7  * Copyright (C) 2009 Igor M. Liplianin <liplianin@netup.ru>
   8  * Copyright (C) 2009 Abylay Ospan <aospan@netup.ru>
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License as published by
  12  * the Free Software Foundation; either version 2 of the License, or
  13  * (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  *
  19  * GNU General Public License for more details.
  20  */
  21
  22 #include "cx23885.h"
  23 #include "netup-init.h"
  24
  25 static void i2c_av_write(struct i2c_adapter *i2c, u16 reg, u8 val)
  26 {
  27         int ret;
  28         u8 buf[3];
  29         struct i2c_msg msg = {
  30                 .addr   = 0x88 >> 1,
  31                 .flags  = 0,
  32                 .buf    = buf,
  33                 .len    = 3
  34         };
  35
  36         buf[0] = reg >> 8;
  37         buf[1] = reg & 0xff;
  38         buf[2] = val;
  39
  40         ret = i2c_transfer(i2c, &msg, 1);
  41
  42         if (ret != 1)
  43                 printk(KERN_ERR "%s: i2c write error!\n", __func__);
  44 }
  45
  46 static void i2c_av_write4(struct i2c_adapter *i2c, u16 reg, u32 val)
  47 {
  48         int ret;
  49         u8 buf[6];
  50         struct i2c_msg msg = {
  51                 .addr   = 0x88 >> 1,
  52                 .flags  = 0,
  53                 .buf    = buf,
  54                 .len    = 6
  55         };
  56
  57         buf[0] = reg >> 8;
  58         buf[1] = reg & 0xff;
  59         buf[2] = val & 0xff;
  60         buf[3] = (val >> 8) & 0xff;
  61         buf[4] = (val >> 16) & 0xff;
  62         buf[5] = val >> 24;
  63
  64         ret = i2c_transfer(i2c, &msg, 1);
  65
  66         if (ret != 1)
  67                 printk(KERN_ERR "%s: i2c write error!\n", __func__);
  68 }
  69
  70 static u8 i2c_av_read(struct i2c_adapter *i2c, u16 reg)
  71 {
  72         int ret;
  73         u8 buf[2];
  74         struct i2c_msg msg = {
  75                 .addr   = 0x88 >> 1,
  76                 .flags  = 0,
  77                 .buf    = buf,
  78                 .len    = 2
  79         };
  80
  81         buf[0] = reg >> 8;
  82         buf[1] = reg & 0xff;
  83
  84         ret = i2c_transfer(i2c, &msg, 1);
  85
  86         if (ret != 1)
  87                 printk(KERN_ERR "%s: i2c write error!\n", __func__);
  88
  89         msg.flags = I2C_M_RD;
  90         msg.len = 1;
  91
  92         ret = i2c_transfer(i2c, &msg, 1);
  93
  94         if (ret != 1)
  95                 printk(KERN_ERR "%s: i2c read error!\n", __func__);
  96
  97         return buf[0];
  98 }
  99
 100 static void i2c_av_and_or(struct i2c_adapter *i2c, u16 reg, unsigned and_mask,
 101                                                                 u8 or_value)
 102 {
 103         i2c_av_write(i2c, reg, (i2c_av_read(i2c, reg) & and_mask) | or_value);
 104 }
 105 /* set 27MHz on AUX_CLK */
 106 void netup_initialize(struct cx23885_dev *dev)
 107 {
 108         struct cx23885_i2c *i2c_bus = &dev->i2c_bus[2];
 109         struct i2c_adapter *i2c = &i2c_bus->i2c_adap;
 110
 111         /* Stop microcontroller */
 112         i2c_av_and_or(i2c, 0x803, ~0x10, 0x00);
 113
 114         /* Aux PLL frac for 27 MHz */
 115         i2c_av_write4(i2c, 0x114, 0xea0eb3);
 116
 117         /* Aux PLL int for 27 MHz */
 118         i2c_av_write4(i2c, 0x110, 0x090319);
 119
 120         /* start microcontroller */
 121         i2c_av_and_or(i2c, 0x803, ~0x10, 0x10);
 122 }