* (C) Copyright 2000
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
*
- * See file CREDITS for list of people who contributed to this
- * project.
- *
- * This program 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 Software Foundation; either version 2 of
- * the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
- * MA 02111-1307 USA
+ * SPDX-License-Identifier: GPL-2.0+
*
* Hacked for the DB64360 board by Ingo.Assmus@keymile.com
* extra improvments by Brain Waite
#include <common.h>
#include <mpc8xx.h>
#include <malloc.h>
+#include <i2c.h>
#include "../../Marvell/include/mv_gen_reg.h"
#include "../../Marvell/include/core.h"
/* Assuming that there is only one master on the bus (us) */
-static void i2c_init (int speed, int slaveaddr)
+void i2c_init (int speed, int slaveaddr)
{
unsigned int n, m, freq, margin, power;
unsigned int actualN = 0, actualM = 0;
unsigned int minMargin = 0xffffffff;
- unsigned int tclk = CFG_TCLK;
+ unsigned int tclk = CONFIG_SYS_TCLK;
unsigned int i2cFreq = speed; /* 100000 max. Fast mode not supported */
DP (puts ("i2c_init\n"));
/* Setup bus */
/* gtI2cReset */
GT_REG_WRITE (I2C_SOFT_RESET, 0);
- asm(" sync");
+ asm(" sync");
GT_REG_WRITE (I2C_CONTROL, 0);
- asm(" sync");
+ asm(" sync");
DP (puts ("set baudrate\n"));
GT_REG_WRITE (I2C_STATUS_BAUDE_RATE, (actualM << 3) | actualN);
- asm(" sync");
+ asm(" sync");
DP (puts ("udelay...\n"));
udelay (I2C_DELAY);
GT_REG_WRITE (I2C_CONTROL, (0x1 << 2) | (0x1 << 6));
- asm(" sync");
+ asm(" sync");
}
static uchar i2c_select_device (uchar dev_addr, uchar read, int ten_bit)
{
unsigned int status, data, bits = 7;
- unsigned int control;
+ unsigned int control;
int count = 0;
DP (puts ("i2c_select_device\n"));
GT_REG_READ (I2C_CONTROL, &control);
control |= (0x1 << 2);
GT_REG_WRITE (I2C_CONTROL, control);
- asm(" sync");
+ asm(" sync");
GT_REG_READ (I2C_CONTROL, &control);
control |= (0x1 << 5); /* generate the I2C_START_BIT */
GT_REG_WRITE (I2C_CONTROL, control);
- asm(" sync");
+ asm(" sync");
RESET_REG_BITS (I2C_CONTROL, (0x01 << 3));
- asm(" sync");
+ asm(" sync");
GT_REG_READ (I2C_CONTROL, &status);
while ((status & 0x08) != 0x08) {
- GT_REG_READ (I2C_CONTROL, &status);
- }
+ GT_REG_READ (I2C_CONTROL, &status);
+ }
count = 0;
while (((status & 0xff) != 0x08) && ((status & 0xff) != 0x10)){
if (count > 200) {
#ifdef DEBUG_I2C
- printf ("Failed to set startbit: 0x%02x\n", status);
+ printf ("Failed to set startbit: 0x%02x\n", status);
#endif
GT_REG_WRITE (I2C_CONTROL, (0x1 << 4)); /*stop */
asm(" sync");
/* set the read bit */
data |= read;
GT_REG_WRITE (I2C_DATA, data);
- asm(" sync");
+ asm(" sync");
RESET_REG_BITS (I2C_CONTROL, BIT3);
- asm(" sync");
+ asm(" sync");
GT_REG_READ (I2C_CONTROL, &status);
while ((status & 0x08) != 0x08) {
- GT_REG_READ (I2C_CONTROL, &status);
- }
+ GT_REG_READ (I2C_CONTROL, &status);
+ }
GT_REG_READ (I2C_STATUS_BAUDE_RATE, &status);
count = 0;
while (((status & 0xff) != 0x40) && ((status & 0xff) != 0x18)) {
if (count > 200) {
#ifdef DEBUG_I2C
- printf ("Failed to write address: 0x%02x\n", status);
+ printf ("Failed to write address: 0x%02x\n", status);
#endif
GT_REG_WRITE (I2C_CONTROL, (0x1 << 4)); /*stop */
return (status);
GT_REG_READ (I2C_CONTROL, &status);
while ((status & 0x08) != 0x08) {
- GT_REG_READ (I2C_CONTROL, &status);
- }
+ GT_REG_READ (I2C_CONTROL, &status);
+ }
GT_REG_READ (I2C_STATUS_BAUDE_RATE, &status);
count++;
while ((status & 0xff) != 0x50) {
if (count > 20) {
#ifdef DEBUG_I2C
- printf ("Failed to get data len status: 0x%02x\n", status);
+ printf ("Failed to get data len status: 0x%02x\n", status);
#endif
GT_REG_WRITE (I2C_CONTROL, (0x1 << 4)); /*stop */
asm(" sync");
}
RESET_REG_BITS (I2C_CONTROL, BIT2 | BIT3);
- asm(" sync");
+ asm(" sync");
count = 0;
GT_REG_READ (I2C_CONTROL, &status);
while ((status & 0x08) != 0x08) {
- GT_REG_READ (I2C_CONTROL, &status);
- }
+ GT_REG_READ (I2C_CONTROL, &status);
+ }
while ((status & 0xff) != 0x58) {
if (count > 2000) {
count++;
}
GT_REG_WRITE (I2C_CONTROL, (0x1 << 4)); /* stop */
- asm(" sync");
+ asm(" sync");
RESET_REG_BITS (I2C_CONTROL, (0x1 << 3));
- asm(" sync");
+ asm(" sync");
return (0);
}
DP (puts ("i2c_write_data\n"));
while (len) {
- count = 0;
+ count = 0;
temp = (unsigned int) (*temp_ptr);
GT_REG_WRITE (I2C_DATA, temp);
asm(" sync");
GT_REG_READ (I2C_CONTROL, &status);
while ((status & 0x08) != 0x08) {
GT_REG_READ (I2C_CONTROL, &status);
- }
+ }
GT_REG_READ (I2C_STATUS_BAUDE_RATE, &status);
count++;
DP (puts ("i2c_write_byte\n"));
while (len) {
- count = 0;
+ count = 0;
/* Set and assert the data */
temp = *temp_ptr;
GT_REG_WRITE (I2C_DATA, temp);
GT_REG_READ (I2C_CONTROL, &status);
while ((status & 0x08) != 0x08) {
GT_REG_READ (I2C_CONTROL, &status);
- }
+ }
GT_REG_READ (I2C_STATUS_BAUDE_RATE, &status);
count++;
return 0; /* sucessful completion */
}
-uchar
+int
i2c_read (uchar dev_addr, unsigned int offset, int alen, uchar * data,
int len)
{
uchar status = 0;
- unsigned int i2cFreq = CFG_I2C_SPEED;
+ unsigned int i2cFreq = CONFIG_SYS_I2C_SPEED;
DP (puts ("i2c_read\n"));
- i2c_init (i2cFreq, 0); /* set the i2c frequency */
+ /* set the i2c frequency */
+ i2c_init (i2cFreq, CONFIG_SYS_I2C_SLAVE);
status = i2c_set_dev_offset (dev_addr, offset, 0, alen); /* send the slave address + offset */
if (status) {
void i2c_stop (void)
{
GT_REG_WRITE (I2C_CONTROL, (0x1 << 4));
- asm(" sync");
+ asm(" sync");
}
-uchar
+int
i2c_write (uchar dev_addr, unsigned int offset, int alen, uchar * data,
int len)
{
uchar status = 0;
- unsigned int i2cFreq = CFG_I2C_SPEED;
+ unsigned int i2cFreq = CONFIG_SYS_I2C_SPEED;
DP (puts ("i2c_write\n"));
- i2c_init (i2cFreq, 0); /* set the i2c frequency */
+ /* set the i2c frequency */
+ i2c_init (i2cFreq, CONFIG_SYS_I2C_SLAVE);
status = i2c_set_dev_offset (dev_addr, offset, 0, alen); /* send the slave address + offset */
if (status) {
status);
#endif
return status;
- }
+ }
status = i2c_write_byte (data, len); /* write the data */
printf ("Data not written: 0x%02x\n", status);
#endif
return status;
- }
+ }
/* issue a stop bit */
i2c_stop ();
return 0;
unsigned int i2c_status;
#endif
uchar status = 0;
- unsigned int i2cFreq = CFG_I2C_SPEED;
+ unsigned int i2cFreq = CONFIG_SYS_I2C_SPEED;
DP (puts ("i2c_probe\n"));
- i2c_init (i2cFreq, 0); /* set the i2c frequency */
+ /* set the i2c frequency */
+ i2c_init (i2cFreq, CONFIG_SYS_I2C_SLAVE);
status = i2c_set_dev_offset (chip, 0, 0, 0); /* send the slave address + no offset */
if (status) {
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