mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-25 22:20:45 +00:00
0c7645bde0
Move the init code into the I2C driver. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Heiko Schocher <hs@denx.de> Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
75 lines
1.7 KiB
C
75 lines
1.7 KiB
C
/*
|
|
* Copyright (c) 2015 Google, Inc
|
|
* Written by Simon Glass <sjg@chromium.org>
|
|
*
|
|
* SPDX-License-Identifier: GPL-2.0+
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <dm.h>
|
|
#include <i2c.h>
|
|
#include <asm/io.h>
|
|
#include <asm/arch/pch.h>
|
|
|
|
int intel_i2c_xfer(struct udevice *bus, struct i2c_msg *msg, int nmsgs)
|
|
{
|
|
return -ENOSYS;
|
|
}
|
|
|
|
int intel_i2c_probe_chip(struct udevice *bus, uint chip_addr, uint chip_flags)
|
|
{
|
|
return -ENOSYS;
|
|
}
|
|
|
|
int intel_i2c_set_bus_speed(struct udevice *bus, unsigned int speed)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static int intel_i2c_probe(struct udevice *dev)
|
|
{
|
|
/*
|
|
* So far this is just setup code for ivybridge SMbus. When we have
|
|
* a full I2C driver this may need to be moved, generalised or made
|
|
* dependant on a particular compatible string.
|
|
*
|
|
* Set SMBus I/O base
|
|
*/
|
|
dm_pci_write_config32(dev, SMB_BASE,
|
|
SMBUS_IO_BASE | PCI_BASE_ADDRESS_SPACE_IO);
|
|
|
|
/* Set SMBus enable. */
|
|
dm_pci_write_config8(dev, HOSTC, HST_EN);
|
|
|
|
/* Set SMBus I/O space enable. */
|
|
dm_pci_write_config16(dev, PCI_COMMAND, PCI_COMMAND_IO);
|
|
|
|
/* Disable interrupt generation. */
|
|
outb(0, SMBUS_IO_BASE + SMBHSTCTL);
|
|
|
|
/* Clear any lingering errors, so transactions can run. */
|
|
outb(inb(SMBUS_IO_BASE + SMBHSTSTAT), SMBUS_IO_BASE + SMBHSTSTAT);
|
|
debug("SMBus controller enabled\n");
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct dm_i2c_ops intel_i2c_ops = {
|
|
.xfer = intel_i2c_xfer,
|
|
.probe_chip = intel_i2c_probe_chip,
|
|
.set_bus_speed = intel_i2c_set_bus_speed,
|
|
};
|
|
|
|
static const struct udevice_id intel_i2c_ids[] = {
|
|
{ .compatible = "intel,ich-i2c" },
|
|
{ }
|
|
};
|
|
|
|
U_BOOT_DRIVER(intel_i2c) = {
|
|
.name = "i2c_intel",
|
|
.id = UCLASS_I2C,
|
|
.of_match = intel_i2c_ids,
|
|
.per_child_auto_alloc_size = sizeof(struct dm_i2c_chip),
|
|
.ops = &intel_i2c_ops,
|
|
.probe = intel_i2c_probe,
|
|
};
|