2f119a31f7
Use of `device_t` has been abandoned in ramstage. Change-Id: I5eb858df7b69a7177564c883b81177ffadc63691 Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr> Reviewed-on: https://review.coreboot.org/26005 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Patrick Georgi <pgeorgi@google.com>
93 lines
2.5 KiB
C
93 lines
2.5 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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#include <stdint.h>
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#include <console/console.h>
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#include <device/device.h>
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#include <device/smbus.h>
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struct bus *get_pbus_smbus(struct device *dev)
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{
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struct bus *const pbus = i2c_link(dev);
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if (!pbus->dev->ops->ops_smbus_bus) {
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printk(BIOS_ALERT, "%s Cannot find SMBus bus operations",
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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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/*
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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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*
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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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*
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* @param dev TODO.
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*/
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int smbus_set_link(struct device *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(BIOS_INFO, "smbus_set_link: ");
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for (i = pbus_num - 1; i >= 0; i--) {
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// printk(BIOS_INFO, " %s[%d] -> ", dev_path(pbus_a[i]->dev),
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// 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
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&& pbus_a[i]->dev->ops->set_link)
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pbus_a[i]->dev->ops->set_link(pbus_a[i]->dev,
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pbus_a[i]->link_num);
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}
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}
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// printk(BIOS_INFO, " %s\n", dev_path(dev));
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return pbus_num;
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}
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#define CHECK_PRESENCE(x) \
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if (!ops_smbus_bus(get_pbus_smbus(dev))->x) { \
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printk(BIOS_ERR, "%s missing " #x "\n", \
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dev_path(dev)); \
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return -1; \
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}
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int smbus_block_read(struct device *dev, u8 cmd, u8 bytes, u8 *buffer)
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{
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CHECK_PRESENCE(block_read);
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return ops_smbus_bus(get_pbus_smbus(dev))->block_read(dev, cmd,
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bytes, buffer);
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}
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int smbus_block_write(struct device *dev, u8 cmd, u8 bytes, const u8 *buffer)
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{
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CHECK_PRESENCE(block_write);
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return ops_smbus_bus(get_pbus_smbus(dev))->block_write(dev, cmd,
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bytes, buffer);
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}
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