-//#include <device/smbus_def.h>
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2007 Advanced Micro Devices, Inc.
+ *
+ * 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
#define SMBUS_ERROR -1
#define SMBUS_WAIT_UNTIL_READY_TIMEOUT -2
#define SMBUS_WAIT_UNTIL_DONE_TIMEOUT -3
#define SMBUS_TIMEOUT (100*1000*10)
#define SMBUS_STATUS_MASK 0xfbff
-
static void smbus_delay(void)
{
inb(0x80);
}
-static int smbus_wait(unsigned smbus_io_base) {
+static int smbus_wait(unsigned smbus_io_base)
+{
unsigned long loops = SMBUS_TIMEOUT;
unsigned char val;
if ((val & SMB_STS_SDAST) != 0)
break;
if (val & (SMB_STS_BER | SMB_STS_NEGACK)) {
- printk_debug("SMBUS WAIT ERROR %x\n", val);
+ printk(BIOS_DEBUG, "SMBUS WAIT ERROR %x\n", val);
return SMBUS_ERROR;
}
- } while(--loops);
+ } while (--loops);
outb(0, smbus_io_base + SMB_STS);
return loops ? 0 : SMBUS_WAIT_UNTIL_READY_TIMEOUT;
}
-static int smbus_write(unsigned smbus_io_base, unsigned char byte) {
+static int smbus_write(unsigned smbus_io_base, unsigned char byte)
+{
outb(byte, smbus_io_base + SMB_SDA);
return smbus_wait(smbus_io_base);
if ((val & SMB_CTRL1_STOP) == 0) {
break;
}
- } while(--loops);
- return loops?0:SMBUS_WAIT_UNTIL_READY_TIMEOUT;
+ } while (--loops);
+ return loops ? 0 : SMBUS_WAIT_UNTIL_READY_TIMEOUT;
/* Make sure everything is cleared and ready to go */
val = inb(smbus_io_base + SMB_CTRL1);
outb(val & ~(SMB_CTRL1_STASTRE | SMB_CTRL1_NMINTE),
- smbus_io_base + SMB_CTRL1);
+ smbus_io_base + SMB_CTRL1);
outb(SMB_STS_BER | SMB_STS_NEGACK | SMB_STS_STASTR,
- smbus_io_base + SMB_STS);
+ smbus_io_base + SMB_STS);
val = inb(smbus_io_base + SMB_CTRL_STS);
outb(val | SMB_CSTS_BB, smbus_io_base + SMB_CTRL_STS);
return 0;
}
-static int smbus_send_slave_address(unsigned smbus_io_base, unsigned char device)
+static int smbus_send_slave_address(unsigned smbus_io_base,
+ unsigned char device)
{
unsigned char val;
/* check for bus conflict and NACK */
val = inb(smbus_io_base + SMB_STS);
- if (((val & SMB_STS_BER) != 0) ||
- ((val & SMB_STS_NEGACK) != 0)) {
- printk_debug("SEND SLAVE ERROR (%x)\n", val);
+ if (((val & SMB_STS_BER) != 0) || ((val & SMB_STS_NEGACK) != 0)) {
+ printk(BIOS_DEBUG, "SEND SLAVE ERROR (%x)\n", val);
return SMBUS_ERROR;
}
return smbus_wait(smbus_io_base);
static int smbus_send_command(unsigned smbus_io_base, unsigned char command)
{
- unsigned char val;
+ unsigned char val;
/* send the command */
outb(command, smbus_io_base + SMB_SDA);
/* check for bus conflict and NACK */
val = inb(smbus_io_base + SMB_STS);
- if (((val & SMB_STS_BER) != 0) ||
- ((val & SMB_STS_NEGACK) != 0))
+ if (((val & SMB_STS_BER) != 0) || ((val & SMB_STS_NEGACK) != 0))
return SMBUS_ERROR;
return smbus_wait(smbus_io_base);
}
static void _doread(unsigned smbus_io_base, unsigned char device,
- unsigned char address, unsigned char *data, int count)
+ unsigned char address, unsigned char *data, int count)
{
int ret;
int index = 0;
if ((ret = smbus_start_condition(smbus_io_base)))
goto err;
- index++; /* 2 */
+ index++; /* 2 */
if ((ret = smbus_send_slave_address(smbus_io_base, device)))
goto err;
if ((ret = smbus_send_slave_address(smbus_io_base, device | 0x01)))
goto err;
- while(count) {
+ while (count) {
/* Set the ACK if this is the next to last byte */
smbus_ack(smbus_io_base, (count == 2) ? 1 : 0);
return;
- err:
- printk_debug("SMBUS READ ERROR (%d): %d\n", index, ret);
+ err:
+ printk(BIOS_DEBUG, "SMBUS READ ERROR (%d): %d\n", index, ret);
}
static unsigned char do_smbus_read_byte(unsigned smbus_io_base,
- unsigned char device,
+ unsigned char device,
unsigned char address)
{
unsigned char val = 0;
}
static unsigned short do_smbus_read_word(unsigned smbus_io_base,
- unsigned char device, unsigned char address)
+ unsigned char device,
+ unsigned char address)
{
unsigned short val = 0;
- _doread(smbus_io_base, device, address, (unsigned char *) &val,
- sizeof(val));
+ _doread(smbus_io_base, device, address, (unsigned char *)&val,
+ sizeof(val));
return val;
}
static int _dowrite(unsigned smbus_io_base, unsigned char device,
- unsigned char address, unsigned char *data, int count) {
+ unsigned char address, unsigned char *data, int count)
+{
int ret;
if ((ret = smbus_send_command(smbus_io_base, address)))
goto err;
- while(count) {
+ while (count) {
if ((ret = smbus_write(smbus_io_base, *data++)))
goto err;
count--;
smbus_stop_condition(smbus_io_base);
return 0;
- err:
- printk_debug("SMBUS WRITE ERROR: %d\n", ret);
+ err:
+ printk(BIOS_DEBUG, "SMBUS WRITE ERROR: %d\n", ret);
return -1;
}
-
static int do_smbus_write_byte(unsigned smbus_io_base, unsigned char device,
- unsigned char address, unsigned char data)
+ unsigned char address, unsigned char data)
{
return _dowrite(smbus_io_base, device, address,
- (unsigned char *) &data, 1);
+ (unsigned char *)&data, 1);
}
-static int do_smbus_write_word(unsigned smbus_io_base, unsigned char device, unsigned char address,
- unsigned short data)
+static int do_smbus_write_word(unsigned smbus_io_base, unsigned char device,
+ unsigned char address, unsigned short data)
{
- return _dowrite(smbus_io_base, device ,address, (unsigned char *) &data, 2);
+ return _dowrite(smbus_io_base, device, address, (unsigned char *)&data,
+ 2);
}
projects / coreboot.git / blobdiff