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southbridge/intel/common: Add Process Call

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Add functionality to use process call cycle. It can be used to
write/read data to/from e.g. EEPROM attached to SMBus Controller
via I2C.

Tested on:
* C246

Change-Id: Ifdac6cf70a4ce744601f5d152a83d2125ea88360
Signed-off-by: Christian Walter <christian.walter@9elements.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/39875
Reviewed-by: Patrick Rudolph <siro@das-labor.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
This commit is contained in:
Christian Walter 2020-03-27 11:59:43 +01:00 • committed by Patrick Georgi
commit 04953ebf5f
2 changed files with 38 additions and 0 deletions
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1
src/include/device/smbus_host.h
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@ -17,6 +17,7 @@ int do_smbus_write_word(uintptr_t base, u8 device, u8 address, u16 data);
int do_smbus_block_read(uintptr_t base, u8 device, u8 cmd, size_t max_bytes, u8 *buf);
int do_smbus_block_write(uintptr_t base, u8 device, u8 cmd, size_t bytes, const u8 *buf);
int do_smbus_process_call(uintptr_t base, u8 device, u8 cmd, u16 data, u16 *buf);
/* For Intel, implemented since ICH5. */
int do_i2c_eeprom_read(uintptr_t base, u8 device, u8 offset, size_t bytes, u8 *buf);