115 lines
3.6 KiB
C
115 lines
3.6 KiB
C
/*
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* This file is part of the coreboot project.
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*
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* Copyright (C) 2004 Tyan
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* (Written by Yinghai Lu <yhlu@tyan.com> for Tyan)
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* Copyright (C) 2004 Li-Ta Lo <ollie@lanl.gov>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; version 2 of the License.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include <console/console.h>
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#include <stdint.h>
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#include <device/device.h>
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#include <device/path.h>
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#include <device/smbus.h>
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struct bus *get_pbus_smbus(device_t dev)
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{
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struct bus *pbus = dev->bus;
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while (pbus && pbus->dev && !ops_smbus_bus(pbus)) {
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pbus = pbus->dev->bus;
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}
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if (!pbus || !pbus->dev || !pbus->dev->ops || !pbus->dev->ops->ops_smbus_bus) {
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printk_alert("%s Cannot find smbus bus operations", dev_path(dev));
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die("");
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}
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return pbus;
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}
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/*multi level i2c MUX??? may need to find the first i2c device and then set link
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* down to current dev
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1 store get_pbus_smbus list link
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2 reverse the link and call set link */
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int smbus_set_link(device_t dev)
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{
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struct bus *pbus_a[4]; // 4 level mux only. Enough?
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struct bus *pbus = dev->bus;
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int pbus_num=0;
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int i;
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while(pbus && pbus->dev && (pbus->dev->path.type==DEVICE_PATH_I2C)) {
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pbus_a[pbus_num++] = pbus;
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pbus = pbus->dev->bus;
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}
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// printk_info("smbus_set_link: ");
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for (i=pbus_num-1; i>=0; i--) {
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// printk_info(" %s[%d] -> ", dev_path(pbus_a[i]->dev), pbus_a[i]->link);
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if (ops_smbus_bus(get_pbus_smbus(pbus_a[i]->dev))) {
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if (pbus_a[i]->dev->ops && pbus_a[i]->dev->ops->set_link)
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pbus_a[i]->dev->ops->set_link(pbus_a[i]->dev, pbus_a[i]->link);
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}
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}
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// printk_info(" %s\n", dev_path(dev));
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return pbus_num;
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}
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int smbus_quick_read(device_t dev)
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{
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return ops_smbus_bus(get_pbus_smbus(dev))->quick_read(dev);
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}
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int smbus_quick_write(device_t dev)
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{
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return ops_smbus_bus(get_pbus_smbus(dev))->quick_write(dev);
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}
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int smbus_recv_byte(device_t dev)
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{
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return ops_smbus_bus(get_pbus_smbus(dev))->recv_byte(dev);
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}
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int smbus_send_byte(device_t dev, uint8_t byte)
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{
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return ops_smbus_bus(get_pbus_smbus(dev))->send_byte(dev, byte);
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}
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int smbus_read_byte(device_t dev, uint8_t addr)
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{
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return ops_smbus_bus(get_pbus_smbus(dev))->read_byte(dev, addr);
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}
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int smbus_write_byte(device_t dev, uint8_t addr, uint8_t val)
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{
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return ops_smbus_bus(get_pbus_smbus(dev))->write_byte(dev, addr, val);
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}
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int smbus_read_word(device_t dev, uint8_t addr)
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{
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return ops_smbus_bus(get_pbus_smbus(dev))->read_word(dev, addr);
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}
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int smbus_write_word(device_t dev, uint8_t addr, uint16_t val)
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{
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return ops_smbus_bus(get_pbus_smbus(dev))->write_word(dev, addr, val);
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}
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int smbus_process_call(device_t dev, uint8_t cmd, uint16_t data)
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{
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return ops_smbus_bus(get_pbus_smbus(dev))->process_call(dev, cmd, data);
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}
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int smbus_block_read(device_t dev, uint8_t cmd, uint8_t bytes, uint8_t *buffer)
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{
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return ops_smbus_bus(get_pbus_smbus(dev))->block_read(dev, cmd, bytes, buffer);
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}
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int smbus_block_write(device_t dev, uint8_t cmd, uint8_t bytes, const uint8_t *buffer)
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{
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return ops_smbus_bus(get_pbus_smbus(dev))->block_write(dev, cmd, bytes, buffer);
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}
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