diff options
| author | qianfan Zhao <qianfanguijin@163.com> | 2023-06-06 10:19:32 +0100 |
|---|---|---|
| committer | Peter Maydell <peter.maydell@linaro.org> | 2023-06-06 10:19:32 +0100 |
| commit | 44814e210acb589bfdab073b3bed3a6d9a306ca3 (patch) | |
| tree | 9530bb72945632d443c1c655cb69a94386438935 /hw | |
| parent | d1e409c5831b2f48b285a4d00f84fbc6a3a927bb (diff) | |
| download | qemu-44814e210acb589bfdab073b3bed3a6d9a306ca3.zip qemu-44814e210acb589bfdab073b3bed3a6d9a306ca3.tar.gz qemu-44814e210acb589bfdab073b3bed3a6d9a306ca3.tar.bz2 | |
hw: arm: allwinner-r40: Add i2c0 device
TWI(i2c) is designed to be used as an interface between CPU host and the
serial 2-Wire bus. It can support all standard 2-Wire transfer, can be
operated in standard mode(100kbit/s) or fast-mode, supporting data rate
up to 400kbit/s.
Signed-off-by: qianfan Zhao <qianfanguijin@163.com>
Reviewed-by: Niek Linnenbank <nieklinnenbank@gmail.com>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Diffstat (limited to 'hw')
| -rw-r--r-- | hw/arm/allwinner-r40.c | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/hw/arm/allwinner-r40.c b/hw/arm/allwinner-r40.c index 537a90b..4bc5826 100644 --- a/hw/arm/allwinner-r40.c +++ b/hw/arm/allwinner-r40.c @@ -52,6 +52,7 @@ const hwaddr allwinner_r40_memmap[] = { [AW_R40_DEV_UART5] = 0x01c29400, [AW_R40_DEV_UART6] = 0x01c29800, [AW_R40_DEV_UART7] = 0x01c29c00, + [AW_R40_DEV_TWI0] = 0x01c2ac00, [AW_R40_DEV_GIC_DIST] = 0x01c81000, [AW_R40_DEV_GIC_CPU] = 0x01c82000, [AW_R40_DEV_GIC_HYP] = 0x01c84000, @@ -115,7 +116,6 @@ static struct AwR40Unimplemented r40_unimplemented[] = { { "uart7", 0x01c29c00, 1 * KiB }, { "ps20", 0x01c2a000, 1 * KiB }, { "ps21", 0x01c2a400, 1 * KiB }, - { "twi0", 0x01c2ac00, 1 * KiB }, { "twi1", 0x01c2b000, 1 * KiB }, { "twi2", 0x01c2b400, 1 * KiB }, { "twi3", 0x01c2b800, 1 * KiB }, @@ -167,6 +167,7 @@ enum { AW_R40_GIC_SPI_UART1 = 2, AW_R40_GIC_SPI_UART2 = 3, AW_R40_GIC_SPI_UART3 = 4, + AW_R40_GIC_SPI_TWI0 = 7, AW_R40_GIC_SPI_UART4 = 17, AW_R40_GIC_SPI_UART5 = 18, AW_R40_GIC_SPI_UART6 = 19, @@ -270,6 +271,8 @@ static void allwinner_r40_init(Object *obj) object_initialize_child(obj, mmc_names[i], &s->mmc[i], TYPE_AW_SDHOST_SUN5I); } + + object_initialize_child(obj, "twi0", &s->i2c0, TYPE_AW_I2C_SUN6I); } static void allwinner_r40_realize(DeviceState *dev, Error **errp) @@ -416,6 +419,12 @@ static void allwinner_r40_realize(DeviceState *dev, Error **errp) 115200, serial_hd(i), DEVICE_NATIVE_ENDIAN); } + /* I2C */ + sysbus_realize(SYS_BUS_DEVICE(&s->i2c0), &error_fatal); + sysbus_mmio_map(SYS_BUS_DEVICE(&s->i2c0), 0, s->memmap[AW_R40_DEV_TWI0]); + sysbus_connect_irq(SYS_BUS_DEVICE(&s->i2c0), 0, + qdev_get_gpio_in(DEVICE(&s->gic), AW_R40_GIC_SPI_TWI0)); + /* Unimplemented devices */ for (i = 0; i < ARRAY_SIZE(r40_unimplemented); i++) { create_unimplemented_device(r40_unimplemented[i].device_name, |