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  * You should have received a copy of the GNU General Public License
  22  * along with this program; if not, write to the Free Software
  23  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  24  */
  25
  26 #include "cx23885.h"
  27 #include "netup-init.h"
  28
  29 static void i2c_av_write(struct i2c_adapter *i2c, u16 reg, u8 val)
  30 {
  31         int ret;
  32         u8 buf[3];
  33         struct i2c_msg msg = {
  34                 .addr   = 0x88 >> 1,
  35                 .flags  = 0,
  36                 .buf    = buf,
  37                 .len    = 3
  38         };
  39
  40         buf[0] = reg >> 8;
  41         buf[1] = reg & 0xff;
  42         buf[2] = val;
  43
  44         ret = i2c_transfer(i2c, &msg, 1);
  45
  46         if (ret != 1)
  47                 printk(KERN_ERR "%s: i2c write error!\n", __func__);
  48 }
  49
  50 static void i2c_av_write4(struct i2c_adapter *i2c, u16 reg, u32 val)
  51 {
  52         int ret;
  53         u8 buf[6];
  54         struct i2c_msg msg = {
  55                 .addr   = 0x88 >> 1,
  56                 .flags  = 0,
  57                 .buf    = buf,
  58                 .len    = 6
  59         };
  60
  61         buf[0] = reg >> 8;
  62         buf[1] = reg & 0xff;
  63         buf[2] = val & 0xff;
  64         buf[3] = (val >> 8) & 0xff;
  65         buf[4] = (val >> 16) & 0xff;
  66         buf[5] = val >> 24;
  67
  68         ret = i2c_transfer(i2c, &msg, 1);
  69
  70         if (ret != 1)
  71                 printk(KERN_ERR "%s: i2c write error!\n", __func__);
  72 }
  73
  74 static u8 i2c_av_read(struct i2c_adapter *i2c, u16 reg)
  75 {
  76         int ret;
  77         u8 buf[2];
  78         struct i2c_msg msg = {
  79                 .addr   = 0x88 >> 1,
  80                 .flags  = 0,
  81                 .buf    = buf,
  82                 .len    = 2
  83         };
  84
  85         buf[0] = reg >> 8;
  86         buf[1] = reg & 0xff;
  87
  88         ret = i2c_transfer(i2c, &msg, 1);
  89
  90         if (ret != 1)
  91                 printk(KERN_ERR "%s: i2c write error!\n", __func__);
  92
  93         msg.flags = I2C_M_RD;
  94         msg.len = 1;
  95
  96         ret = i2c_transfer(i2c, &msg, 1);
  97
  98         if (ret != 1)
  99                 printk(KERN_ERR "%s: i2c read error!\n", __func__);
 100
 101         return buf[0];
 102 }
 103
 104 static void i2c_av_and_or(struct i2c_adapter *i2c, u16 reg, unsigned and_mask,
 105                                                                 u8 or_value)
 106 {
 107         i2c_av_write(i2c, reg, (i2c_av_read(i2c, reg) & and_mask) | or_value);
 108 }
 109 /* set 27MHz on AUX_CLK */
 110 void netup_initialize(struct cx23885_dev *dev)
 111 {
 112         struct cx23885_i2c *i2c_bus = &dev->i2c_bus[2];
 113         struct i2c_adapter *i2c = &i2c_bus->i2c_adap;
 114
 115         /* Stop microcontroller */
 116         i2c_av_and_or(i2c, 0x803, ~0x10, 0x00);
 117
 118         /* Aux PLL frac for 27 MHz */
 119         i2c_av_write4(i2c, 0x114, 0xea0eb3);
 120
 121         /* Aux PLL int for 27 MHz */
 122         i2c_av_write4(i2c, 0x110, 0x090319);
 123
 124         /* start microcontroller */
 125         i2c_av_and_or(i2c, 0x803, ~0x10, 0x10);
 126 }