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{hw/i2c,docs/system/arm}: Allwinner TWI/I2C Emulation

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This patch implements Allwinner TWI/I2C controller emulation. Only
master-mode functionality is implemented.

The SPL boot for Cubieboard expects AXP209 PMIC on TWI0/I2C0 bus, so this is
first part enabling the TWI/I2C bus operation.

Since both Allwinner A10 and H3 use the same module, it is added for
both boards.

Docs are also updated for Cubieboard and Orangepi-PC board to indicate
I2C availability.

Signed-off-by: Strahinja Jankovic <strahinja.p.jankovic@gmail.com>
Reviewed-by: Niek Linnenbank <nieklinnenbank@gmail.com>
Message-id: 20221226220303.14420-4-strahinja.p.jankovic@gmail.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Strahinja Jankovic 2022-12-26 23:02:59 +01:00 • committed by Peter Maydell
parent edd3a59d5b
commit 9be8a82c0e
12 changed files with 551 additions and 1 deletions
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2
include/hw/arm/allwinner-a10.h
View file

@ -15,6 +15,7 @@
#include "hw/rtc/allwinner-rtc.h"
#include "hw/misc/allwinner-a10-ccm.h"
#include "hw/misc/allwinner-a10-dramc.h"
#include "hw/i2c/allwinner-i2c.h"
#include "target/arm/cpu.h"
#include "qom/object.h"
@ -40,6 +41,7 @@ struct AwA10State {
AwEmacState emac;
AllwinnerAHCIState sata;
AwSdHostState mmc0;
AWI2CState i2c0;
AwRtcState rtc;
MemoryRegion sram_a;
EHCISysBusState ehci[AW_A10_NUM_USB];

3
include/hw/arm/allwinner-h3.h
View file

@ -47,6 +47,7 @@
#include "hw/sd/allwinner-sdhost.h"
#include "hw/net/allwinner-sun8i-emac.h"
#include "hw/rtc/allwinner-rtc.h"
#include "hw/i2c/allwinner-i2c.h"
#include "target/arm/cpu.h"
#include "sysemu/block-backend.h"
@ -82,6 +83,7 @@ enum {
AW_H3_DEV_UART2,
AW_H3_DEV_UART3,
AW_H3_DEV_EMAC,
AW_H3_DEV_TWI0,
AW_H3_DEV_DRAMCOM,
AW_H3_DEV_DRAMCTL,
AW_H3_DEV_DRAMPHY,
@ -130,6 +132,7 @@ struct AwH3State {
AwH3SysCtrlState sysctrl;
AwSidState sid;
AwSdHostState mmc0;
AWI2CState i2c0;
AwSun8iEmacState emac;
AwRtcState rtc;
GICState gic;