5817c56d19
Change-Id: I746ea7805bae553a146130994d8174aa2e189610 Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr> Reviewed-on: https://review.coreboot.org/c/coreboot/+/43368 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Angel Pons <th3fanbus@gmail.com>
83 lines
2.4 KiB
C
83 lines
2.4 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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#ifndef __DEVICE_SMBUS_HOST_H__
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#define __DEVICE_SMBUS_HOST_H__
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#include <stddef.h>
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#include <stdint.h>
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#include <console/console.h>
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/* Low-level SMBUS host controller. */
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int do_smbus_recv_byte(uintptr_t base, u8 device);
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int do_smbus_send_byte(uintptr_t base, u8 device, u8 val);
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int do_smbus_read_byte(uintptr_t base, u8 device, u8 address);
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int do_smbus_write_byte(uintptr_t base, u8 device, u8 address, u8 data);
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int do_smbus_read_word(uintptr_t base, u8 device, u8 address);
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int do_smbus_write_word(uintptr_t base, u8 device, u8 address, u16 data);
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int do_smbus_block_read(uintptr_t base, u8 device, u8 cmd, size_t max_bytes, u8 *buf);
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int do_smbus_block_write(uintptr_t base, u8 device, u8 cmd, size_t bytes, const u8 *buf);
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int do_smbus_process_call(uintptr_t base, u8 device, u8 cmd, u16 data, u16 *buf);
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/* For Intel, implemented since ICH5. */
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int do_i2c_eeprom_read(uintptr_t base, u8 device, u8 offset, size_t bytes, u8 *buf);
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int do_i2c_block_write(uintptr_t base, u8 device, size_t bytes, u8 *buf);
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/* Upstream API */
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uintptr_t smbus_base(void);
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int smbus_enable_iobar(uintptr_t base);
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void smbus_host_reset(uintptr_t base);
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void smbus_set_slave_addr(uintptr_t base, u8 slave_address);
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static inline void enable_smbus(void)
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{
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uintptr_t base = smbus_base();
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if (smbus_enable_iobar(base) < 0)
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die("SMBus controller not found!");
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smbus_host_reset(base);
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printk(BIOS_DEBUG, "SMBus controller enabled\n");
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}
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#if DEVTREE_EARLY
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static inline int smbus_read_byte(u8 device, u8 address)
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{
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uintptr_t base = smbus_base();
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return do_smbus_read_byte(base, device, address);
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}
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static inline int smbus_read_word(u8 device, u8 address)
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{
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uintptr_t base = smbus_base();
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return do_smbus_read_word(base, device, address);
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}
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static inline int smbus_write_byte(u8 device, u8 address, u8 data)
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{
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uintptr_t base = smbus_base();
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return do_smbus_write_byte(base, device, address, data);
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}
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static inline int smbus_block_read(u8 device, u8 cmd, size_t max_bytes, u8 *buf)
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{
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uintptr_t base = smbus_base();
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return do_smbus_block_read(base, device, cmd, max_bytes, buf);
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}
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static inline int smbus_block_write(u8 device, u8 cmd, size_t bytes, const u8 *buf)
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{
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uintptr_t base = smbus_base();
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return do_smbus_block_write(base, device, cmd, bytes, buf);
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}
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static inline int i2c_eeprom_read(u8 device, u8 offset, size_t bytes, u8 *buf)
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{
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uintptr_t base = smbus_base();
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return do_i2c_eeprom_read(base, device, offset, bytes, buf);
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}
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#endif
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#endif
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