Linux设备驱动剖析之IIC（三）

Linux设备驱动剖析之IIC（三）

 eeprom_write_byte( eeprom *(e->type ==] = { mem_addr &  (e->type ==] =>> ) & , mem_addr &  -

  i2c_write_2b( eeprom *e, __u8 buf[
    r = i2c_smbus_write_byte_data(e->fd, buf[], buf[(r < 

 inline __s32 i2c_smbus_write_byte_data( =&

 inline __s32 i2c_smbus_access( file,  size, union i2c_smbus_data *==== ioctl(file,I2C_SMBUS,&

   i2cdev_ioctl( file *file, unsigned  cmd, unsigned       i2c_client *client = file->     unsigned  
     dev_dbg(&client->adapter->dev,  
                        
          ((arg > ) ||
             (((client->flags & I2C_M_TEN) == ) && arg >               -          (cmd == I2C_SLAVE && i2cdev_check_addr(client->              -         
         client->addr =                                     client->flags |=         
             client->flags &= ~                                     client->flags |=         
             client->flags &= ~                        funcs = i2c_get_functionality(client->          put_user(funcs, (unsigned  __user * 
               
               
              client->adapter->retries =                       
         client->adapter->timeout = msecs_to_jiffies(arg *                        
          -       }

  noinline  i2cdev_ioctl_smbus( i2c_client *         unsigned            
      (copy_from_user(&                ( i2c_smbus_ioctl_data __user *                (          -      ((data_arg.size != I2C_SMBUS_BYTE) &&
         (data_arg.size != I2C_SMBUS_QUICK) &&
         (data_arg.size != I2C_SMBUS_BYTE_DATA) &&
         (data_arg.size != I2C_SMBUS_WORD_DATA) &&
         (data_arg.size != I2C_SMBUS_PROC_CALL) &&
         (data_arg.size != I2C_SMBUS_BLOCK_DATA) &&
         (data_arg.size != I2C_SMBUS_I2C_BLOCK_BROKEN) &&
         (data_arg.size != I2C_SMBUS_I2C_BLOCK_DATA) &&
         (data_arg.size !=         dev_dbg(&client->adapter->                       -     
      ((data_arg.read_write != I2C_SMBUS_READ) &&
         (data_arg.read_write !=         dev_dbg(&client->adapter->                       - 
     
 
      ((data_arg.size == I2C_SMBUS_QUICK) ||
         ((data_arg.size == I2C_SMBUS_BYTE) &&
         (data_arg.read_write ==         
          i2c_smbus_xfer(client->adapter, client->                       client-> 
      (data_arg.data ==         dev_dbg(&client->adapter->                       - 
      ((data_arg.size == I2C_SMBUS_BYTE_DATA) ||
         (data_arg.size ==         datasize = (data_arg.data->       ((data_arg.size == I2C_SMBUS_WORD_DATA) ||
          (data_arg.size ==         datasize = (data_arg.data->      
         datasize = (data_arg.data-> 
      ((data_arg.size == I2C_SMBUS_PROC_CALL) ||
         (data_arg.size == I2C_SMBUS_BLOCK_PROC_CALL) ||
         (data_arg.size == I2C_SMBUS_I2C_BLOCK_DATA) ||
         (data_arg.read_write ==          (copy_from_user(&              -      (data_arg.size ==         
         data_arg.size =          (data_arg.read_write ==             temp.block[] =     res = i2c_smbus_xfer(client->adapter, client->addr, client->           data_arg.read_write, data_arg.command, data_arg.size, &      (!res && ((data_arg.size == I2C_SMBUS_PROC_CALL) ||
              (data_arg.size == I2C_SMBUS_BLOCK_PROC_CALL) ||
              (data_arg.read_write ==          (copy_to_user(data_arg.data, &              -      }

 s32 i2c_smbus_xfer( i2c_adapter *adapter, u16 addr, unsigned              read_write, u8 command,             union i2c_smbus_data *     unsigned        
     flags &= I2C_M_TEN | 
      (adapter->algo-> 
         
         orig_jiffies =          (res = ,  = ;  <= adapter->retries; ++             res = adapter->algo->              (res != -                                                      orig_jiffies + adapter->                      } 
         res = 
      }

  s32 i2c_smbus_xfer_emulated( i2c_adapter *                    unsigned                      read_write, u8 command,                     union i2c_smbus_data *     
     unsigned  msgbuf0[I2C_SMBUS_BLOCK_MAX+     unsigned  msgbuf1[I2C_SMBUS_BLOCK_MAX+      num = read_write == I2C_SMBUS_READ ?  :       i2c_msg msg[] = { { addr, flags,                                { addr, flags | I2C_M_RD,           u8 partial_pec =       
     msgbuf0[] =                   msg[].len =          
         msg[].flags = flags | (read_write == I2C_SMBUS_READ ?
                     I2C_M_RD :          num =                         (read_write ==             
             msg[].flags = I2C_M_RD |             num =                         (read_write ==             msg[].len =                       msg[].len =              msgbuf0[] = data->                        (read_write ==             msg[].len =                       msg[].len =              msgbuf0[] = data->word &              msgbuf0[] = data->word >>                        num = ; 
         read_write =         msg[].len =          msg[].len =          msgbuf0[] = data->word &          msgbuf0[] = data->word >>                         (read_write ==             msg[].flags |=             msg[].len = ; 
         }              msg[].len = data->block[] +               (msg[].len > I2C_SMBUS_BLOCK_MAX +                  dev_err(&adapter->                                          data->block[                  -              (i = ; i < msg[].len; i++                 msgbuf0[i] = data->block[i-                       num = ; 
         read_write =          (data->block[] >             dev_err(&adapter->                                  data->block[              -         msg[].len = data->block[] +           (i = ; i < msg[].len; i++             msgbuf0[i] = data->block[i-         msg[].flags |=         msg[].len = ; 
                        (read_write ==             msg[].len = data->block[         }              msg[].len = data->block[] +               (msg[].len > I2C_SMBUS_BLOCK_MAX +                  dev_err(&adapter->                                          data->block[                  -              (i = ; i <= data->block[]; i++                 msgbuf0[i] = data->                       dev_err(&adapter->dev,           - 
     i = ((flags & I2C_CLIENT_PEC) && size !=                       && size !=              
          (!(msg[].flags &              (num == ) 
                 i2c_smbus_add_pec(&msg[              
                 partial_pec = i2c_smbus_msg_pec(, &msg[         
          (msg[num-].flags &             msg[num-].len++ 
     status =      (status <           
     
      (i && (msg[num-].flags &         status = i2c_smbus_check_pec(partial_pec, &msg[num-          (status <               
      (read_write ==                               data-> = msgbuf0[                                   data-> = msgbuf1[                                            data->word = msgbuf1[] | (msgbuf1[] <<                                     (i = ; i < data->block[]; i++                 data->block[i+] =                                             (i = ; i < msgbuf1[] + ; i++                 data->block[i] =                    }

  i2c_transfer( i2c_adapter *adap,  i2c_msg *msgs,      unsigned       ret,  
     
 
      (adap->algo->          (ret = ; ret < num; ret++             dev_dbg(&adap->dev, 
                 , ret, (msgs[ret].flags &                 ?  :                  (msgs[ret].flags & I2C_M_RECV_LEN) ?  :  
 
          (in_atomic() ||             ret =              (!                 
                  -         }  
         
         orig_jiffies =          (ret = ,  = ;  <= adap->retries; ++             ret = adap->algo->              (ret != -                               (time_after(jiffies, orig_jiffies + adap->                  
              }          dev_dbg(&adap->dev,           - }

   s3c24xx_i2c_xfer( i2c_adapter *              i2c_msg *msgs,       s3c24xx_i2c *i2c = ( s3c24xx_i2c *)adap->           
      (retry = ; retry < adap->retries; retry++ 
         ret = 
          (ret != -              
         dev_dbg(i2c->dev,  
         udelay( 
      - }