release/src-rt-6.x.4708/linux/linux-2.6.36/drivers/media/video/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
  28 static void i2c_av_write(struct i2c_adapter *i2c, u16 reg, u8 val)
  29 {
  30         int ret;
  31         u8 buf[3];
  32         struct i2c_msg msg = {
  33                 .addr   = 0x88 >> 1,
  34                 .flags  = 0,
  35                 .buf    = buf,
  36                 .len    = 3
  37         };
  38
  39         buf[0] = reg >> 8;
  40         buf[1] = reg & 0xff;
  41         buf[2] = val;
  42
  43         ret = i2c_transfer(i2c, &msg, 1);
  44
  45         if (ret != 1)
  46                 printk(KERN_ERR "%s: i2c write error!\n", __func__);
  47 }
  48
  49 static void i2c_av_write4(struct i2c_adapter *i2c, u16 reg, u32 val)
  50 {
  51         int ret;
  52         u8 buf[6];
  53         struct i2c_msg msg = {
  54                 .addr   = 0x88 >> 1,
  55                 .flags  = 0,
  56                 .buf    = buf,
  57                 .len    = 6
  58         };
  59
  60         buf[0] = reg >> 8;
  61         buf[1] = reg & 0xff;
  62         buf[2] = val & 0xff;
  63         buf[3] = (val >> 8) & 0xff;
  64         buf[4] = (val >> 16) & 0xff;
  65         buf[5] = val >> 24;
  66
  67         ret = i2c_transfer(i2c, &msg, 1);
  68
  69         if (ret != 1)
  70                 printk(KERN_ERR "%s: i2c write error!\n", __func__);
  71 }
  72
  73 static u8 i2c_av_read(struct i2c_adapter *i2c, u16 reg)
  74 {
  75         int ret;
  76         u8 buf[2];
  77         struct i2c_msg msg = {
  78                 .addr   = 0x88 >> 1,
  79                 .flags  = 0,
  80                 .buf    = buf,
  81                 .len    = 2
  82         };
  83
  84         buf[0] = reg >> 8;
  85         buf[1] = reg & 0xff;
  86
  87         ret = i2c_transfer(i2c, &msg, 1);
  88
  89         if (ret != 1)
  90                 printk(KERN_ERR "%s: i2c write error!\n", __func__);
  91
  92         msg.flags = I2C_M_RD;
  93         msg.len = 1;
  94
  95         ret = i2c_transfer(i2c, &msg, 1);
  96
  97         if (ret != 1)
  98                 printk(KERN_ERR "%s: i2c read error!\n", __func__);
  99
 100         return buf[0];
 101 }
 102
 103 static void i2c_av_and_or(struct i2c_adapter *i2c, u16 reg, unsigned and_mask,
 104                                                                 u8 or_value)
 105 {
 106         i2c_av_write(i2c, reg, (i2c_av_read(i2c, reg) & and_mask) | or_value);
 107 }
 108 /* set 27MHz on AUX_CLK */
 109 void netup_initialize(struct cx23885_dev *dev)
 110 {
 111         struct cx23885_i2c *i2c_bus = &dev->i2c_bus[2];
 112         struct i2c_adapter *i2c = &i2c_bus->i2c_adap;
 113
 114         /* Stop microcontroller */
 115         i2c_av_and_or(i2c, 0x803, ~0x10, 0x00);
 116
 117         /* Aux PLL frac for 27 MHz */
 118         i2c_av_write4(i2c, 0x114, 0xea0eb3);
 119
 120         /* Aux PLL int for 27 MHz */
 121         i2c_av_write4(i2c, 0x110, 0x090319);
 122
 123         /* start microcontroller */
 124         i2c_av_and_or(i2c, 0x803, ~0x10, 0x10);
 125 }