138 lines
3.6 KiB
C
138 lines
3.6 KiB
C
/*
|
|
* This file is part of the coreboot project.
|
|
*
|
|
* Copyright (C) 2004 Tyan
|
|
* (Written by Yinghai Lu <yhlu@tyan.com> for Tyan)
|
|
* Copyright (C) 2004 Li-Ta Lo <ollie@lanl.gov>
|
|
*
|
|
* 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; version 2 of the License.
|
|
*
|
|
* 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
|
|
*/
|
|
|
|
#include <console/console.h>
|
|
#include <stdint.h>
|
|
#include <device/device.h>
|
|
#include <device/path.h>
|
|
#include <device/smbus.h>
|
|
|
|
struct bus *get_pbus_smbus(device_t dev)
|
|
{
|
|
struct bus *pbus = dev->bus;
|
|
|
|
while (pbus && pbus->dev && !ops_smbus_bus(pbus))
|
|
pbus = pbus->dev->bus;
|
|
|
|
if (!pbus || !pbus->dev || !pbus->dev->ops
|
|
|| !pbus->dev->ops->ops_smbus_bus) {
|
|
printk(BIOS_ALERT, "%s Cannot find SMBus bus operations",
|
|
dev_path(dev));
|
|
die("");
|
|
}
|
|
|
|
return pbus;
|
|
}
|
|
|
|
/*
|
|
* Multi-level I2C MUX? May need to find the first I2C device and then set link
|
|
* down to current dev.
|
|
*
|
|
* 1 store get_pbus_smbus list link
|
|
* 2 reverse the link and call set link.
|
|
*
|
|
* @param dev TODO.
|
|
*/
|
|
int smbus_set_link(device_t dev)
|
|
{
|
|
struct bus *pbus_a[4]; // 4 level mux only. Enough?
|
|
struct bus *pbus = dev->bus;
|
|
int pbus_num = 0;
|
|
int i;
|
|
|
|
while (pbus && pbus->dev && (pbus->dev->path.type == DEVICE_PATH_I2C)) {
|
|
pbus_a[pbus_num++] = pbus;
|
|
pbus = pbus->dev->bus;
|
|
}
|
|
|
|
// printk(BIOS_INFO, "smbus_set_link: ");
|
|
for (i = pbus_num - 1; i >= 0; i--) {
|
|
// printk(BIOS_INFO, " %s[%d] -> ", dev_path(pbus_a[i]->dev),
|
|
// pbus_a[i]->link);
|
|
if (ops_smbus_bus(get_pbus_smbus(pbus_a[i]->dev))) {
|
|
if (pbus_a[i]->dev->ops
|
|
&& pbus_a[i]->dev->ops->set_link)
|
|
pbus_a[i]->dev->ops->set_link(pbus_a[i]->dev,
|
|
pbus_a[i]->link_num);
|
|
}
|
|
}
|
|
// printk(BIOS_INFO, " %s\n", dev_path(dev));
|
|
|
|
return pbus_num;
|
|
}
|
|
|
|
int smbus_quick_read(device_t dev)
|
|
{
|
|
return ops_smbus_bus(get_pbus_smbus(dev))->quick_read(dev);
|
|
}
|
|
|
|
int smbus_quick_write(device_t dev)
|
|
{
|
|
return ops_smbus_bus(get_pbus_smbus(dev))->quick_write(dev);
|
|
}
|
|
|
|
int smbus_recv_byte(device_t dev)
|
|
{
|
|
return ops_smbus_bus(get_pbus_smbus(dev))->recv_byte(dev);
|
|
}
|
|
|
|
int smbus_send_byte(device_t dev, u8 byte)
|
|
{
|
|
return ops_smbus_bus(get_pbus_smbus(dev))->send_byte(dev, byte);
|
|
}
|
|
|
|
int smbus_read_byte(device_t dev, u8 addr)
|
|
{
|
|
return ops_smbus_bus(get_pbus_smbus(dev))->read_byte(dev, addr);
|
|
}
|
|
|
|
int smbus_write_byte(device_t dev, u8 addr, u8 val)
|
|
{
|
|
return ops_smbus_bus(get_pbus_smbus(dev))->write_byte(dev, addr, val);
|
|
}
|
|
|
|
int smbus_read_word(device_t dev, u8 addr)
|
|
{
|
|
return ops_smbus_bus(get_pbus_smbus(dev))->read_word(dev, addr);
|
|
}
|
|
|
|
int smbus_write_word(device_t dev, u8 addr, u16 val)
|
|
{
|
|
return ops_smbus_bus(get_pbus_smbus(dev))->write_word(dev, addr, val);
|
|
}
|
|
|
|
int smbus_process_call(device_t dev, u8 cmd, u16 data)
|
|
{
|
|
return ops_smbus_bus(get_pbus_smbus(dev))->process_call(dev, cmd, data);
|
|
}
|
|
|
|
int smbus_block_read(device_t dev, u8 cmd, u8 bytes, u8 *buffer)
|
|
{
|
|
return ops_smbus_bus(get_pbus_smbus(dev))->block_read(dev, cmd,
|
|
bytes, buffer);
|
|
}
|
|
|
|
int smbus_block_write(device_t dev, u8 cmd, u8 bytes, const u8 *buffer)
|
|
{
|
|
return ops_smbus_bus(get_pbus_smbus(dev))->block_write(dev, cmd,
|
|
bytes, buffer);
|
|
}
|