postinit.c

Ibmstb02500 miniboot 源码

/* openbios/arch/pallas/lamar/postinit.c */
/*-----------------------------------------------------------------------------+
|
|       This source code has been made available to you by IBM on an AS-IS
|       basis.  Anyone receiving this source is licensed under IBM
|       copyrights to use it in any way he or she deems fit, including
|       copying it, modifying it, compiling it, and redistributing it either
|       with or without modifications.  No license under IBM patents or
|       patent applications is to be implied by the copyright license.
|
|       Any user of this software should understand that IBM cannot provide
|       technical support for this software and will not be responsible for
|       any consequences resulting from the use of this software.
|
|       Any person who transfers this source code or any derivative work
|       must include the IBM copyright notice, this paragraph, and the
|       preceding two paragraphs in the transferred software.
|
|       COPYRIGHT   I B M   CORPORATION 1995
|       LICENSED MATERIAL  -  PROGRAM PROPERTY OF I B M
+-----------------------------------------------------------------------------*/
/*-----------------------------------------------------------------------------+
|
|  File Name:  postinit.c
|
|  Function:   Do more board init before OPENBIOS is startup.
|
|  Author:     Yudong Yang
|
|  Change Activity-
|
|  Date        Description of Change                                       BY
|  ---------   ---------------------                                       ---
|  26-Mar-02   Created                                                     YYD
|  29-Mar-02   Add CS4360 init code                                        YYD
|
+-----------------------------------------------------------------------------*/


void   board_post_init(void)
{
	unsigned char buf[16];

	MT_DCR(0x1a1, 0x00000410);   // enable audio clock and mute
	// this is a must for the DAC to accept i2c data

	// set Xilinx reset bits
	// note that cs4360 need a second reset
	*((unsigned short *)0xf2030000) = 0xffff;
	msdelay(1);	// delay 1 ms
	*((unsigned short *)0xf2030000) = 0xfffe;
	

	// init cs4360 STEP 1

	buf[0]  = 0x01; // addr 
	buf[1]  = 0x10; // mode control 2, ENABLE CONTROL PORT
	i2c_bus_write(0, 0x20, buf, 2, 0);

	buf[0]  = 0x02; // addr 
	buf[1]  = 0x00; // mode control 2, ENABLE CONTROL PORT
	i2c_bus_write(0, 0x20, buf, 2, 0);

	buf[0]  = 0x03; // addr 
	buf[1]  = 0x09; // mode control 2, ENABLE CONTROL PORT
	i2c_bus_write(0, 0x20, buf, 2, 0);

	buf[0]  = 0x06; // addr 
	buf[1]  = 0x00; // mode control 2, ENABLE CONTROL PORT
	i2c_bus_write(0, 0x20, buf, 2, 0);

	buf[0]  = 0x08; // addr 
	buf[1]  = 0x00; // mode control 2, ENABLE CONTROL PORT
	i2c_bus_write(0, 0x20, buf, 2, 0);

	buf[0]  = 0x0C; // addr 
	buf[1]  = 0x23; // mode control 2, ENABLE CONTROL PORT
	i2c_bus_write(0, 0x20, buf, 2, 0);
/*	
	buf[0]  = 0x0C; // addr 
	buf[1]  = 0x24; // mode control 2, ENABLE CONTROL PORT
	i2c_bus_write(0, 0x20, buf, 2, 0);

	// init cs4360 STEP 2
	buf[0]  = 0x01; // addr 
	buf[1]  = 0x10; // mode control 1
	buf[2]  = 0x00; // invert signal 
	buf[3]  = 0x09; // mixing 1
	buf[4]  = 0x09; // mixing 2
	buf[5]  = 0x09; // mixing 3
	buf[6]  = 0x00;   // volumn control  
	buf[7]  = 0x00;   // volumn control  
	buf[8]  = 0x00;   // volumn control  
	buf[9]  = 0x00;   // volumn control  
	buf[10] = 0x00;   // volumn control  
	buf[11] = 0x00;   // volumn control
	buf[12] = 0x23;   // mode control 2
	i2c_bus_write(0, 0x20, buf, 13, 0);
*/
	msdelay(10);	// delay 10 ms	

	// init cxa2161r for S-Video
	buf[0] = 0x06; 
	buf[1] = 0x00; 
	buf[2] = 0x00; 
	buf[3] = 0x00; 
	buf[4] = 0x01; 
	buf[5] = 0x00; 
	buf[6] = 0x3f; 
	i2c_bus_write(0, 0x90, buf, 7, 0);

	return;		// not needed yet
}