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hw/i2c/aspeed: add slave device in old register mode

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Add slave mode functionality for the Aspeed I2C controller in old
register mode. This is implemented by realizing an I2C slave device
owned by the I2C controller and attached to its own bus.

The I2C slave device only implements asynchronous sends on the bus, so
slaves not supporting that will not be able to communicate with it.

Signed-off-by: Klaus Jensen <k.jensen@samsung.com>
[ clg: checkpatch fixes ]
Message-Id: <20220601210831.67259-6-its@irrelevant.dk>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
Message-Id: <20220630045133.32251-7-me@pjd.dev>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
This commit is contained in:
Klaus Jensen 2022-06-30 09:21:14 +02:00 • committed by Cédric Le Goater
parent a78e9839ae
commit a8d48f59cd
2 changed files with 88 additions and 9 deletions
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8
include/hw/i2c/aspeed_i2c.h
View file

@ -223,6 +223,9 @@ struct AspeedI2CBus {
struct AspeedI2CState *controller;
/* slave mode */
I2CSlave *slave;
MemoryRegion mr;
I2CBus *bus;
@ -249,6 +252,11 @@ struct AspeedI2CState {
AddressSpace dram_as;
};
#define TYPE_ASPEED_I2C_BUS_SLAVE "aspeed.i2c.slave"
OBJECT_DECLARE_SIMPLE_TYPE(AspeedI2CBusSlave, ASPEED_I2C_BUS_SLAVE)
struct AspeedI2CBusSlave {
I2CSlave i2c;
};
struct AspeedI2CClass {
SysBusDeviceClass parent_class;