//####ECOSGPLCOPYRIGHTBEGIN####
// -------------------------------------------
// This file is part of eCos, the Embedded Configurable Operating System.
-// Copyright (C) 2005 eCosCentric LTD
+// Copyright (C) 2005 eCosCentric Ltd.
//
// eCos is free software; you can redistribute it and/or modify it under
// the terms of the GNU General Public License as published by the Free
//
// This exception does not invalidate any other reasons why a work based on
// this file might be covered by the GNU General Public License.
+//
+//####ECOSGPLCOPYRIGHTEND####
// ====================================================================
//#####DESCRIPTIONBEGIN####
//
// Author(s): Harald Brandl (harald.brandl@fh-joanneum.at)
// Contributors: Harald Brandl
-// Date: 10.03.2005
-// Purpose: EEPROM I/O
+// Date: 10.03.2005
+// Purpose: EEPROM I/O
// Description:
//
//####DESCRIPTIONEND####
//
// ====================================================================
-#include <cyg/hal/hal_netarm.h>
-#include <sys/types.h>
+#include <cyg/hal/hal_modnet50.h>
+#include "eth_regs.h"
static void wait(int time)
{
- int i;
-
- for(i=0; i < time; i++);
+ int i;
+
+ for(i=0; i < time; i++);
}
+/* send i2c stop condition */
static void i2cStop(void)
{
- *PORTC |= 0x00c00000;
- *PORTC &= ~0x000000c0; // SDA = 0, SLK = 0
- wait(5);
- *PORTC |= 0x00000040; // SLK = 1
- wait(5);
- *PORTC |= 0x00000080; // SDA = 1
+ HAL_OR_UINT32(PORTC, 0x00c00000);
+ HAL_AND_UINT32(PORTC, ~0x000000c0); // SDA = 0, SLK = 0
+ wait(5);
+ HAL_OR_UINT32(PORTC, 0x00000040); // SLK = 1
+ wait(5);
+ HAL_OR_UINT32(PORTC, 0x00000080); // SDA = 1
}
+/* send i2c start condition */
static void i2cStart(void)
{
- *PORTC |= 0x00c000c0; // SDA = 1, SLK = 1
- wait(5);
- *PORTC &= ~0x00000080; // SDA = 0
- wait(5);
- *PORTC &= ~0x00000040; // SLK = 0
+ HAL_OR_UINT32(PORTC, 0x00c000c0); // SDA = 1, SLK = 1
+ wait(5);
+ HAL_AND_UINT32(PORTC, ~0x00000080); // SDA = 0
+ wait(5);
+ HAL_AND_UINT32(PORTC, ~0x00000040); // SLK = 0
}
static void i2cPutByte(char byte)
{
- int i, bit;
-
- *PORTC |= 0x00c00000;
-
- for(i=7; i >= 0; i--)
- {
- bit = (byte >> i) & 1;
- *PORTC = (*PORTC & ~0x80) | (bit << 7); // SDA = data
- *PORTC |= 0x00000040; // SLK = 1
- wait(5);
- *PORTC &= ~0x00000040; // SLK = 0
- wait(5);
- }
- *PORTC |= 0x00000080; // SDA = 1
+ int i, bit, reg;
+
+ HAL_OR_UINT32(PORTC, 0x00c00000);
+
+ for(i=7; i >= 0; i--)
+ {
+ bit = (byte >> i) & 1;
+ HAL_READ_UINT32(PORTC, reg);
+ HAL_WRITE_UINT32(PORTC, (reg & ~0x80) | (bit << 7)); // SDA = data
+ HAL_OR_UINT32(PORTC, 0x00000040); // SLK = 1
+ wait(5);
+ HAL_AND_UINT32(PORTC, ~0x00000040); // SLK = 0
+ wait(5);
+ }
+ HAL_OR_UINT32(PORTC, 0x00000080); // SDA = 1
}
static char i2cGetByte(void)
{
- int i;
- char byte = 0;
-
- *PORTC &= ~0x00800000;
- for(i=7; i >= 0; i--)
- {
- *PORTC |= 0x00000040; // SLK = 1
- byte |= ((*PORTC & 0x80) >> 7) << i; // data = SDA
- wait(5);
- *PORTC &= ~0x00000040; // SLK = 0
- wait(5);
- }
- *PORTC |= 0x00800080; // SDA = 1
- return byte;
+ int i, reg;
+ char byte = 0;
+
+ HAL_AND_UINT32(PORTC, ~0x00800000);
+ for(i=7; i >= 0; i--)
+ {
+ HAL_OR_UINT32(PORTC, 0x00000040); // SLK = 1
+ HAL_READ_UINT32(PORTC, reg);
+ byte |= ((reg & 0x80) >> 7) << i; // data = SDA
+ wait(5);
+ HAL_AND_UINT32(PORTC, ~0x00000040); // SLK = 0
+ wait(5);
+ }
+ HAL_OR_UINT32(PORTC, 0x00800080); // SDA = 1
+ return byte;
}
+/* acknowledge received bytes */
static void i2cGiveAck(void)
{
- *PORTC |= 0x00c00000;
- *PORTC &= ~0x00000080; // SDA = 0
- wait(5);
- *PORTC |= 0x00000040; // SLK = 1
- wait(5);
- *PORTC &= ~0x00000040; // SLK = 0
- wait(5);
- *PORTC |= 0x00000080; // SDA = 1
- wait(5);
+ HAL_OR_UINT32(PORTC, 0x00c00000);
+ HAL_AND_UINT32(PORTC, ~0x00000080); // SDA = 0
+ wait(5);
+ HAL_OR_UINT32(PORTC, 0x00000040); // SLK = 1
+ wait(5);
+ HAL_AND_UINT32(PORTC, ~0x00000040); // SLK = 0
+ wait(5);
+ HAL_OR_UINT32(PORTC, 0x00000080); // SDA = 1
+ wait(5);
}
+/* wait for acknowledge from slaves */
static void i2cGetAck(void)
{
- *PORTC &= ~0x00800000; // SDA in
- *PORTC |= 0x00400040; // SLK = 1
- while(*PORTC & 0x80); // wait for SDA = 1
- *PORTC &= ~0x00000040; // SLK = 0
+ unsigned reg;
+
+ HAL_AND_UINT32(PORTC, ~0x00800000); // SDA in
+ HAL_OR_UINT32(PORTC, 0x00400040); // SLK = 1
+ do
+ {
+ HAL_READ_UINT32(PORTC, reg);
+ }while(reg & 0x80); // wait for SDA = 1
+ HAL_AND_UINT32(PORTC, ~0x00000040); // SLK = 0
}
-void initI2C(void)
+void cyg_netarm_initI2C(void)
{
- *PORTC &= ~0xc0000000; // mode GPIO
- i2cStop();
+ HAL_AND_UINT32(PORTC, ~0xc0000000); // mode GPIO
+ i2cStop();
}
-void eepromPollAck(int deviceAddr)
+/* wait until eeprom's internal write cycle has finished */
+void cyg_netarm_eepromPollAck(int deviceAddr)
{
- deviceAddr <<= 1;
-
- *PORTC |= 0x00400040; // SLK = 1
- while(1)
- {
- i2cStart();
- i2cPutByte(deviceAddr);
- *PORTC &= ~0x00800000; // SDA in
- *PORTC |= 0x00400040; // SLK = 1
- if((*PORTC & 0x80) == 0)
- {
- *PORTC &= ~0x00000040; // SLK = 0
- break;
- }
- *PORTC &= ~0x00000040; // SLK = 0
- }
+ unsigned reg;
+
+ deviceAddr <<= 1;
+
+ HAL_OR_UINT32(PORTC, 0x00400040); // SLK = 1
+ while(1)
+ {
+ i2cStart();
+ i2cPutByte(deviceAddr);
+ HAL_AND_UINT32(PORTC, ~0x00800000); // SDA in
+ HAL_OR_UINT32(PORTC, 0x00400040); // SLK = 1
+ HAL_READ_UINT32(PORTC, reg);
+ if((reg & 0x80) == 0)
+ {
+ HAL_AND_UINT32(PORTC, ~0x00000040); // SLK = 0
+ break;
+ }
+ HAL_AND_UINT32(PORTC, ~0x00000040); // SLK = 0
+ }
}
-void eepromRead(int deviceAddr, int readAddr, char *buf, int numBytes)
+/* reads numBytes from eeprom starting at readAddr into buf */
+void cyg_netarm_eepromRead(int deviceAddr, int readAddr, char *buf, int numBytes)
{
- int i;
-
- deviceAddr <<= 1;
- i2cStart();
- i2cPutByte(deviceAddr);
- i2cGetAck();
- i2cPutByte(readAddr >> 8);
- i2cGetAck();
- i2cPutByte(readAddr & 0xff);
- i2cGetAck();
- i2cStart();
- i2cPutByte(deviceAddr | 1); // set read flag
- i2cGetAck();
-
- for(i=0;i<numBytes;i++)
- {
- buf[i] = i2cGetByte();
- if(i < numBytes - 1)
- i2cGiveAck();
- }
-
- i2cStop();
+ int i;
+
+ deviceAddr <<= 1;
+ i2cStart();
+ i2cPutByte(deviceAddr);
+ i2cGetAck();
+ i2cPutByte(readAddr >> 8);
+ i2cGetAck();
+ i2cPutByte(readAddr & 0xff);
+ i2cGetAck();
+ i2cStart();
+ i2cPutByte(deviceAddr | 1); // set read flag
+ i2cGetAck();
+
+ for(i=0;i<numBytes;i++)
+ {
+ buf[i] = i2cGetByte();
+ if(i < numBytes - 1)
+ i2cGiveAck();
+ }
+
+ i2cStop();
}
-void eepromWrite(int deviceAddr, int writeAddr, char *buf, int numBytes)
+/* writes up to a page of 32 bytes from buf into eeprom;
+max. number of bytes depends on the offset within a page, indexed by the
+lower 5 bits of writeAddr and equals 32 - offset */
+void cyg_netarm_eepromWrite(int deviceAddr, int writeAddr, char *buf, int numBytes)
{
- int i;
-
- deviceAddr <<= 1;
- i2cStart();
- i2cPutByte(deviceAddr);
- i2cGetAck();
- i2cPutByte(writeAddr >> 8);
- i2cGetAck();
- i2cPutByte(writeAddr & 0xff);
- i2cGetAck();
-
- for(i=0; i<numBytes; i++)
- {
- i2cPutByte(buf[i]);
- i2cGetAck();
- }
-
- i2cStop();
+ int i;
+
+ deviceAddr <<= 1;
+ i2cStart();
+ i2cPutByte(deviceAddr);
+ i2cGetAck();
+ i2cPutByte(writeAddr >> 8);
+ i2cGetAck();
+ i2cPutByte(writeAddr & 0xff);
+ i2cGetAck();
+
+ for(i=0; i<numBytes; i++)
+ {
+ i2cPutByte(buf[i]);
+ i2cGetAck();
+ }
+
+ i2cStop();
}
projects / karo-tx-redboot.git / blobdiff