/****************************************************************************/
/*                                                                          */
/* FILE NAME                                      VERSION                   */
/*                                                                          */
/* IDE.C                                            1.0                     */
/*                                                                          */
/* DESCRIPTION                                                              */
/*                                                                          */
/*     JXARM9-2410(S3C2410X)IDE驅動實驗                                     */
/*                                                                          */
/*                                                                          */
/* DATA STRUCTURES                                                          */
/*                                                                          */
/* FUNCTIONS :                                                              */
/*     在JXARM9-2410教學實驗箱進行IDE硬盤驅動的實驗                         */
/*                                                                          */
/* DEPENDENCIES                                                             */
/*     JXARM9-2410-1                                                        */
/*     JXARM9-2410-2                                                        */
/*     JXARM9-2410-3                                                        */
/*                                                                          */
/*                                                                          */
/* NAME:                                                                    */
/* REMARKS:                                                                 */
/*                                                                          */
/*								Copyright (C) 2003 Wuhan CVTECH CO.,LTD     */
/****************************************************************************/

/****************************************************************************/
/* 學習JXARM9-2410中IDE驅動函數的編寫方法：                                 */
/* 注意：                                                                   */
/*     1. 程序運行前請正確接入IDE硬盤，并通電，具體連接請閱讀用戶手冊       */
/*     2. 請不要帶電拔插IDE硬盤接口                                         */
/*     3. 寫硬盤操作將破壞硬盤中的數據，請小心實驗，并備份您的硬盤數據      */
/****************************************************************************/


/**************************************************************************
7.2  I/O Register Descriptions 

Communication to or from the drive is through an I/O Register that routes the 
input or output data to or from registers (selected) by a code on signals from 
the host (CS1FX-, CS3FX-, DA2, DA1, DA0, DIOR- and DIOW-). 

The Command Block Registers are used for sending commands to the drive or 
posting status from the drive. 

The Control Block Registers are used for drive control and to post alternate 
status. 

Table 7-1 lists these registers and the addresses that select them. 

Logic conventions are:   A = signal asserted
                         N = signal negated
                         x = does not matter which it is

            TABLE 7-1:  I/O PORT FUNCTIONS/SELECTION ADDRESSES 
 +-------------------------------+-----------------------------------------+
 |         Addresses             |                 Functions               |
 |CS1FX-|CS3FX-| DA2 | DA1 | DA0 |    READ (DIOR-)     |   WRITE (DIOW-)   |
 +------+------+-----+-----+-----+---------------------+-------------------+
 |                                        Control Block Registers          |
 +------+------+-----+-----+-----+---------------------+-------------------+
 |  N   |  N   |  x  |  x  |  x  | Data Bus High Imped | Not used          |
 |  N   |  A   |  0  |  x  |  X  | Data Bus High Imped | Not used          |
 |  N   |  A   |  1  |  0  |  x  | Data Bus High Imped | Not used          |
 |  N   |  A   |  1  |  1  |  0  | Alternate Status    | Device Control    | 
 |  N   |  A   |  1  |  1  |  1  | Drive Address       | Not used          |
 +------+------+-----+-----+-----+---------------------+-------------------+
 |                                        Command Block Registers          |
 +------+------+-----+-----+-----+---------------------+-------------------+
 |  A   |  N   |  0  |  0  |  0  | Data                | Data              |
 |  A   |  N   |  0  |  0  |  1  | Error Register      | Features          |
 |  A   |  N   |  0  |  1  |  0  | Sector Count        | Sector Count      |
 |  A   |  N   |  0  |  1  |  1  | Sector Number       | Sector Number     | 
 |  A   |  N   |  0  |  1  |  1  | * LBA Bits  0- 7    | * LBA Bits  0- 7  |
 |  A   |  N   |  1  |  0  |  0  | Cylinder Low        | Cylinder Low      |
 |  A   |  N   |  1  |  0  |  0  | * LBA Bits  8-15    | * LBA Bits  8-15  |
 |  A   |  N   |  1  |  0  |  1  | Cylinder High       | Cylinder High     | 
 |  A   |  N   |  1  |  0  |  1  | * LBA Bits 16-23    | * LBA Bits 16-23  |
 |  A   |  N   |  1  |  1  |  0  | Drive/Head          | Drive/Head        |
 |  A   |  N   |  1  |  1  |  0  | * LBA Bits 24-27    | * LBA Bits 24-27  |
 |  A   |  N   |  1  |  1  |  1  | Status              | Command           |
 |  A   |  A   |  x  |  x  |  x  | Invalid Address     | Invalid Address   |
 +------+------+-----+-----+-----+---------------------+-------------------+
                      * Mapping of registers in LBA Mode
**************************************************************************/

#include "def.h"
#include "2410lib.h"
#include "option.h"
#include "2410addr.h"
#include "interrupt.h"

void Main(void)
{
	unsigned short 	dd [256];   /* DiskData */
	unsigned short 	dd_off;     /* DiskData offset */
	unsigned long  	wait_loop;  /* Timeout loop */
	unsigned int 	base;       /* Base address of drive controller */
	unsigned char 	in_val;
    unsigned int 	i;	
	
	/* 配置系統時鐘 */
    ChangeClockDivider(1,1);          // 1:2:4    
    ChangeMPllValue(0xa1,0x3,0x1);    // FCLK=202.8MHz  
    
    /* 初始化端口 */
    Port_Init();
    
    /* 初始化串口 */
    Uart_Init(0,115200);
    Uart_Select(0);
    
    /* 打印提示信息 */
	PRINTF("\n---IDE測試程序---\n請先將IDE硬盤插入IDE插座\n");

	// base address
    base = IDE_COMMAND_BASE;
    
    // set iois
    ide_iois_ctrl(0x0);
    Delay(10);
    
	// switch to command block registers
	ide_cs_ctrl(2);
	Delay(10);
	
	// reset
	ide_rst_ctrl(1);
	Delay(30);
	ide_rst_ctrl(0);
	Delay(50);
	ide_rst_ctrl(1);
	Delay(30);
	
	rBWSCON &= (~(0xf<<8));
	rBWSCON |= (0x01<<8);

	rBANKCON2 = 0x7ffc;	
	Delay(300);


	/* Wait for controller not busy */
	while (1)
	{
		in_val = inp (base + 14);
		Uart_Printf("in_val = 0x%x\n", in_val);
	
		if ((in_val & 0x80) != 0x80)
			break;
	}
			
	Delay(10);
	outp (base + 12, 0xA0);		
	Delay(10);
	outp (base + 14, 0xEC);          /* Get drive info data */
	Delay(50);	

	for (dd_off = 0; dd_off != 512; dd_off+=2) /* Read "sector" */
	{
		if(dd_off % 0x10 == 0)
			Uart_Printf("\n");
		dd[dd_off/2] = inw (base);
		Uart_Printf("%c %c ", dd[dd_off/2], dd[dd_off/2 + 1]);
	}

	Uart_Printf ("Model Number______________________: %s\n", getascii (dd, 27, 46));
	Uart_Printf ("Serial Number_____________________: %s\n", getascii (dd, 10, 19));
	Uart_Printf ("Controller Revision Number________: %s\n\n", getascii (dd, 23, 26));
		
	Uart_Printf ("Able to do Double Word Transfer___: %s\n", (dd [48] == 0 ? "No" : "Yes"));
	Uart_Printf ("Controller buffer size (bytes)____: %u\n", dd [21] * 512);
	Uart_Printf ("Transfer Speed____________________: ");
	if (dd [0] & 0x0400)
		Uart_Printf ("> 10 Mbit/sec\n");
	if (dd [0] & 0x0200)
		Uart_Printf ("5-10 Mbit/sec\n");
	if (dd [0] & 0x0100)
		Uart_Printf ("< 5 Mbit/sec\n");
	Uart_Printf ("\nDrive Type________________________: ");
	if (dd [0] & 0x0080)
		Uart_Printf ("Removable\n");
	if (dd [0] & 0x0040)
		Uart_Printf ("Fixed\n");
	Uart_Printf ("IORDY Supported___________________: %s\n", ((dd [49] & 0x0800) ? "Yes" : "No"));
	Uart_Printf ("Can IORDY be disabled by device___: %s\n", ((dd [49] & 0x0400) ? "Yes" : "No"));
	Uart_Printf ("LBA Mode supported________________: %s\n", ((dd [49] & 0x0200) ? "Yes" : "No"));
	Uart_Printf ("DMA Supported_____________________: %s\n", ((dd [49] & 0x0100) ? "Yes" : "No"));
	Uart_Printf ("Number of ECC bytes transferred___: %u\n", dd [22]);
	Uart_Printf ("Number of sectors per interrupt___: %u\n\n", dd [47] % 256);
	Uart_Printf ("Number of Cylinders_______________: %u\n", dd [1]);
	Uart_Printf ("Number of Heads___________________: %u\n", dd [3]);
	Uart_Printf ("Number of Sectors per Track_______: %u\n\n", dd [6]);
	 
 	Delay(100);
	
	Uart_Printf ("\nRead head %d clyn %d sec_num %d...\n", 0,0,2);
	ide_read_sector(1, 2, 0, 0, (unsigned char*)dd);
	dump_data((unsigned char*)dd, 512);

	Uart_Printf ("\nRead head %d clyn %d sec_num %d...\n", 0,0,1);
	ide_read_sector(1, 1, 0, 0, (unsigned char*)dd);
	dump_data((unsigned char*)dd, 512);
	
	for (dd_off = 0; dd_off != 256; dd_off+=1) /* Read "sector" */
	{
		dd[dd_off] = dd_off;
	}
			
	while(1);
    
	return;
}