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qemu-e2k/hw/i2c
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qianfan Zhao 8461bfdca9 hw: allwinner-i2c: Fix TWI_CNTR_INT_FLAG on SUN6i SoCs 
TWI_CNTR_INT_FLAG is W1C(write 1 to clear and write 0 has non-effect)
register on SUN6i based SoCs, we should lower interrupt when the guest
set this bit.

The linux kernel will hang in irq handler(mv64xxx_i2c_intr) if no
device connected on the i2c bus, next is the trace log:

allwinner_i2c_write write   CNTR(0x0c): 0xc4 A_ACK BUS_EN INT_EN
allwinner_i2c_write write   CNTR(0x0c): 0xcc A_ACK INT_FLAG BUS_EN INT_EN
allwinner_i2c_read  read    CNTR(0x0c): 0xcc A_ACK INT_FLAG BUS_EN INT_EN
allwinner_i2c_read  read    STAT(0x10): 0x20 STAT_M_ADDR_WR_NACK
allwinner_i2c_write write   CNTR(0x0c): 0x54 A_ACK M_STP BUS_EN
allwinner_i2c_write write   CNTR(0x0c): 0x4c A_ACK INT_FLAG BUS_EN
allwinner_i2c_read  read    CNTR(0x0c): 0x4c A_ACK INT_FLAG BUS_EN
allwinner_i2c_read  read    STAT(0x10): 0xf8 STAT_IDLE
allwinner_i2c_write write   CNTR(0x0c): 0x54 A_ACK M_STP BUS_EN
allwinner_i2c_write write   CNTR(0x0c): 0x4c A_ACK INT_FLAG BUS_EN
allwinner_i2c_read  read    CNTR(0x0c): 0x4c A_ACK INT_FLAG BUS_EN
allwinner_i2c_read  read    STAT(0x10): 0xf8 STAT_IDLE
...

Fix it.

Signed-off-by: qianfan Zhao <qianfanguijin@163.com>
Reviewed-by: Strahinja Jankovic <strahinja.p.jankovic@gmail.com>
Tested-by: Strahinja Jankovic <strahinja.p.jankovic@gmail.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2023-03-06 14:08:12 +00:00
..
allwinner-i2c.c hw: allwinner-i2c: Fix TWI_CNTR_INT_FLAG on SUN6i SoCs 2023-03-06 14:08:12 +00:00
arm_sbcon_i2c.c hw/i2c/versatile_i2c: Rename versatile_i2c -> arm_sbcon_i2c 2023-01-23 13:32:38 +00:00
aspeed_i2c.c hw/i2c: only schedule pending master when bus is idle 2023-03-02 13:57:50 +01:00
bitbang_i2c.c hw/i2c/bitbang_i2c: Convert DPRINTF() to trace events 2023-01-23 13:32:38 +00:00
core.c hw/i2c: only schedule pending master when bus is idle 2023-03-02 13:57:50 +01:00
exynos4210_i2c.c Use OBJECT_DECLARE_SIMPLE_TYPE when possible 2020-09-18 14:12:32 -04:00
i2c_mux_pca954x.c Use g_new() & friends where that makes obvious sense 2022-03-21 15:44:44 +01:00
imx_i2c.c hw/i2c: Rename i2c_set_slave_address() -> i2c_slave_set_address() 2021-07-08 14:15:01 -05:00
Kconfig hw/i2c/versatile_i2c: Rename versatile_i2c -> arm_sbcon_i2c 2023-01-23 13:32:38 +00:00
meson.build hw/i2c/versatile_i2c: Rename versatile_i2c -> arm_sbcon_i2c 2023-01-23 13:32:38 +00:00
microbit_i2c.c microbit_i2c: Fix coredump when dump-vmstate 2020-10-20 16:12:00 +01:00
mpc_i2c.c bulk: Rename TARGET_FMT_plx -> HWADDR_FMT_plx 2023-01-18 11:14:34 +01:00
npcm7xx_smbus.c hw/i2c/npcm7xx_smbus: Simplify npcm7xx_smbus_init() 2021-03-05 15:17:34 +00:00
omap_i2c.c
pm_smbus.c hw/i2c: Introduce i2c_start_recv() and i2c_start_send() 2021-07-08 14:15:01 -05:00
pmbus_device.c Don't include headers already included by qemu/osdep.h 2023-02-08 07:28:05 +01:00
ppc4xx_i2c.c hw/i2c/ppc4xx_i2c: Replace i2c_send_recv() by i2c_recv() & i2c_send() 2021-07-08 14:15:01 -05:00
smbus_eeprom.c i2c/smbus_eeprom: Add feature bit to SPD data 2021-07-29 10:59:49 +10:00
smbus_ich9.c hw: Move ich9.h to southbridge/ 2023-02-27 22:29:01 +01:00
smbus_master.c hw/i2c: Introduce i2c_start_recv() and i2c_start_send() 2021-07-08 14:15:01 -05:00
smbus_slave.c hw/i2c: add asynchronous send 2022-06-30 09:21:14 +02:00
trace-events hw/i2c/bitbang_i2c: Convert DPRINTF() to trace events 2023-01-23 13:32:38 +00:00
trace.h