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* Patch by Rune Torgersen, 4 Jun 2003:

Browse Source 
add large memory support for MPC8266ADS board

* Patch by Richard Woodruff, 19 June 03:
  - Enabled standard u-boot device abstraction for ARM
  - Enabled console device for ARM
  - Initilized bi_baudrate for ARM

* Patch by Bill Hargen, 23 Apr 2003:
  fix byte order for 824x I2C addresses (write op)
This commit is contained in:
wdenk
2003-06-22 17:18:28 +00:00
parent 9a0e21a3a8
commit 3595ac4979
5 changed files with 91 additions and 45 deletions
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85
cpu/mpc824x/drivers/i2c/i2c1.c
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@@ -125,10 +125,10 @@ I2C_Status I2C_Initialize (unsigned char addr,
* len is the length of data to send or receive
* buffer is the address of the data buffer
* stop = I2C_NO_STOP, don't signal STOP at end of transaction
* I2C_STOP, signal STOP at end of transaction
* I2C_STOP, signal STOP at end of transaction
* retry is the timeout retry value, currently ignored
* rsta = I2C_NO_RESTART, this is not continuation of existing transaction
* I2C_RESTART, this is a continuation of existing transaction
* I2C_RESTART, this is a continuation of existing transaction
*/
I2C_Status I2C_do_transaction ( I2C_INTERRUPT_MODE en_int,
I2C_TRANSACTION_MODE act,
@@ -191,12 +191,12 @@ I2C_Status I2C_do_transaction ( I2C_INTERRUPT_MODE en_int,
}
/*
* We first have to contact the slave device and transmit the
* data address. Be careful about the STOP and restart stuff.
* We don't want to signal STOP after sending the data
* address, but this could be a continuation if the
* application didn't release the bus after the previous
* transaction, by not sending a STOP after it.
* We first have to contact the slave device and transmit the
* data address. Be careful about the STOP and restart stuff.
* We don't want to signal STOP after sending the data
* address, but this could be a continuation if the
* application didn't release the bus after the previous
* transaction, by not sending a STOP after it.
*/
status = I2C_do_buffer (en_int, I2C_MASTER_XMIT, i2c_addr, 1,
data_addr_buffer, I2C_NO_STOP, retry, rsta);
@@ -231,10 +231,10 @@ I2C_Status I2C_do_transaction ( I2C_INTERRUPT_MODE en_int,
* len is the length of data to send or receive
* buffer is the address of the data buffer
* stop = I2C_NO_STOP, don't signal STOP at end of transaction
* I2C_STOP, signal STOP at end of transaction
* I2C_STOP, signal STOP at end of transaction
* retry is the timeout retry value, currently ignored
* rsta = I2C_NO_RESTART, this is not continuation of existing transaction
* I2C_RESTART, this is a continuation of existing transaction
* I2C_RESTART, this is a continuation of existing transaction
*/
static I2C_Status I2C_do_buffer (I2C_INTERRUPT_MODE en_int,
I2C_TRANSACTION_MODE act,
@@ -518,9 +518,9 @@ static I2CStatus I2C_Timer_Event (unsigned int eumbbar,
* function: I2C_Start
*
* description: Generate a START signal in the desired mode.
* I2C is the master.
* I2C is the master.
*
* Return I2CSUCCESS if no error.
* Return I2CSUCCESS if no error.
*
* note:
****************************************************/
@@ -594,8 +594,8 @@ static I2CStatus I2C_Start (unsigned int eumbbar, unsigned char slave_addr, /* a
* function: I2c_Stop
*
* description: Generate a STOP signal to terminate the master
* transaction.
* return I2CSUCCESS
* transaction.
* return I2CSUCCESS
*
**********************************************************/
static I2CStatus I2C_Stop (unsigned int eumbbar)
@@ -621,10 +621,10 @@ static I2CStatus I2C_Stop (unsigned int eumbbar)
* function: I2C_Master_Xmit
*
* description: Master sends one byte of data to
* slave target
* slave target
*
* return I2CSUCCESS if the byte transmitted.
* Otherwise no-zero
* return I2CSUCCESS if the byte transmitted.
* Otherwise no-zero
*
* Note: condition must meet when this function is called:
* I2CSR(MIF) == 1 && I2CSR(MCF) == 1 && I2CSR(RXAK) == 0
@@ -669,9 +669,9 @@ static I2CStatus I2C_Master_Xmit (unsigned int eumbbar)
* function: I2C_Master_Rcv
*
* description: master reads one byte data
* from slave source
* from slave source
*
* return I2CSUCCESS if no error
* return I2CSUCCESS if no error
*
* Note: condition must meet when this function is called:
* I2CSR(MIF) == 1 && I2CSR(MCF) == 1 &&
@@ -736,10 +736,10 @@ static I2CStatus I2C_Master_Rcv (unsigned int eumbbar)
* function: I2C_Slave_Xmit
*
* description: Slave sends one byte of data to
* requesting destination
* requesting destination
*
* return SUCCESS if the byte transmitted. Otherwise
* No-zero
* return SUCCESS if the byte transmitted. Otherwise
* No-zero
*
* Note: condition must meet when this function is called:
* I2CSR(MIF) == 1 && I2CSR(MCF) == 1 && I2CSR(RXAK) = 0
@@ -757,12 +757,12 @@ static I2CStatus I2C_Slave_Xmit (unsigned int eumbbar)
ByteToXmit = 0;
/*
* do not toggle I2CCR(MTX). Doing so will
* cause bus-hung since current Kahlua design
* does not give master a way to detect slave
* stop. It is always a good idea for master
* to use timer to prevent the long long
* delays
* do not toggle I2CCR(MTX). Doing so will
* cause bus-hung since current Kahlua design
* does not give master a way to detect slave
* stop. It is always a good idea for master
* to use timer to prevent the long long
* delays
*/
return I2CBUFFEMPTY;
@@ -787,9 +787,9 @@ static I2CStatus I2C_Slave_Xmit (unsigned int eumbbar)
* function: I2C_Slave_Rcv
*
* description: slave reads one byte data
* from master source
* from master source
*
* return I2CSUCCESS if no error otherwise non-zero
* return I2CSUCCESS if no error otherwise non-zero
*
* Note: condition must meet when this function is called:
* I2CSR(MIF) == 1 && I2CSR(MCF) == 1 &&
@@ -834,8 +834,8 @@ static I2CStatus I2C_Slave_Rcv (unsigned int eumbbar)
* function: I2C_Init
*
* description: Initialize I2C unit with desired frequency divider,
* master's listening address, with interrupt enabled
* or disabled.
* master's listening address, with interrupt enabled
* or disabled.
*
* note:
********************************************************/
@@ -912,7 +912,7 @@ static I2C_STAT I2C_Get_Stat (unsigned int eumbbar)
* function: I2c_Set_Ctrl
*
* description: Change I2C Control bits,
* i.e., write to I2CCR
* i.e., write to I2CCR
*
********************************************/
static void I2C_Set_Ctrl (unsigned int eumbbar, I2C_CTRL ctrl)
@@ -937,7 +937,7 @@ static void I2C_Set_Ctrl (unsigned int eumbbar, I2C_CTRL ctrl)
* function: I2C_Get_Ctrl
*
* description: Query I2C Control bits,
* i.e., read I2CCR
* i.e., read I2CCR
*****************************************/
static I2C_CTRL I2C_Get_Ctrl (unsigned int eumbbar)
{
@@ -959,7 +959,7 @@ static I2C_CTRL I2C_Get_Ctrl (unsigned int eumbbar)
* function: I2C_Slave_Addr
*
* description: Process slave address phase.
* return I2CSUCCESS if no error
* return I2CSUCCESS if no error
*
* note: Precondition for calling this function:
* I2CSR(MIF) == 1 &&
@@ -1193,14 +1193,17 @@ int i2c_read (uchar chip, uint addr, int alen, uchar * buffer, int len)
int i2c_write (uchar chip, uint addr, int alen, uchar * buffer, int len)
{
I2CStatus status;
unsigned char dummy_buffer[I2C_RXTX_LEN + 2];
uchar dummy_buffer[I2C_RXTX_LEN + 2];
uchar *p;
int i;
dummy_buffer[0] = addr & 0xFF;
if (alen == 2)
dummy_buffer[1] = (addr >> 8) & 0xFF;
for (i = 0; i < len; i++)
dummy_buffer[i + alen] = buffer[i];
p = dummy_buffer;
/* fill in address in big endian order */
for (i=0; i<alen; ++i)
*p++ = (addr >> (i * 8)) & 0xFF;
/* fill in data */
for (i=0; i<len; ++i)
*p++ = *buffer;
status = I2C_do_buffer (0, I2C_MASTER_XMIT, chip, alen + len,
dummy_buffer, I2C_STOP, 1, I2C_NO_RESTART);