2020-04-02 23:49:05 +02:00
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/* SPDX-License-Identifier: GPL-2.0-only */
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2012-10-30 15:03:43 +01:00
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2020-04-06 09:12:50 +02:00
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#include <device/pci_ids.h>
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2019-03-01 12:43:02 +01:00
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#include <device/pci_ops.h>
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2012-10-30 15:03:43 +01:00
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#include <device/pci_def.h>
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2020-01-06 11:31:34 +01:00
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#include <device/smbus_host.h>
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2012-10-30 15:03:43 +01:00
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#include "pch.h"
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2020-01-06 18:41:42 +01:00
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uintptr_t smbus_base(void)
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2012-10-30 15:03:43 +01:00
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{
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2020-01-06 18:41:42 +01:00
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return SMBUS_IO_BASE;
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}
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2012-10-30 15:03:43 +01:00
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2020-01-06 18:41:42 +01:00
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int smbus_enable_iobar(uintptr_t base)
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{
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2012-10-30 15:03:43 +01:00
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/* Set the SMBus device statically. */
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2020-01-06 18:41:42 +01:00
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pci_devfn_t dev = PCI_DEV(0x0, 0x1f, 0x3);
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2012-10-30 15:03:43 +01:00
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/* Check to make sure we've got the right device. */
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2020-04-06 09:12:50 +02:00
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if (pci_read_config16(dev, PCI_VENDOR_ID) != PCI_VENDOR_ID_INTEL)
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2020-01-06 18:41:42 +01:00
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return -1;
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2012-10-30 15:03:43 +01:00
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/* Set SMBus I/O base. */
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pci_write_config32(dev, SMB_BASE,
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2020-01-06 18:41:42 +01:00
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base | PCI_BASE_ADDRESS_SPACE_IO);
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2012-10-30 15:03:43 +01:00
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/* Set SMBus enable. */
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pci_write_config8(dev, HOSTC, HST_EN);
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/* Set SMBus I/O space enable. */
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pci_write_config16(dev, PCI_COMMAND, PCI_COMMAND_IO);
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2020-01-06 18:41:42 +01:00
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return 0;
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2012-10-30 15:03:43 +01:00
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}
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