diff options
Diffstat (limited to 'hw/i2c/core.c')
| -rw-r--r-- | hw/i2c/core.c | 36 |
1 files changed, 35 insertions, 1 deletions
diff --git a/hw/i2c/core.c b/hw/i2c/core.c index 145dce6078..d4ba8146bf 100644 --- a/hw/i2c/core.c +++ b/hw/i2c/core.c @@ -161,7 +161,8 @@ static int i2c_do_start_transfer(I2CBus *bus, uint8_t address, start condition. */ if (sc->event) { - trace_i2c_event("start", s->address); + trace_i2c_event(event == I2C_START_SEND ? "start" : "start_async", + s->address); rv = sc->event(s, event); if (rv && !bus->broadcast) { if (bus_scanned) { @@ -212,6 +213,11 @@ int i2c_start_send(I2CBus *bus, uint8_t address) return i2c_do_start_transfer(bus, address, I2C_START_SEND); } +int i2c_start_send_async(I2CBus *bus, uint8_t address) +{ + return i2c_do_start_transfer(bus, address, I2C_START_SEND_ASYNC); +} + void i2c_end_transfer(I2CBus *bus) { I2CSlaveClass *sc; @@ -261,6 +267,23 @@ int i2c_send(I2CBus *bus, uint8_t data) return ret ? -1 : 0; } +int i2c_send_async(I2CBus *bus, uint8_t data) +{ + I2CNode *node = QLIST_FIRST(&bus->current_devs); + I2CSlave *slave = node->elt; + I2CSlaveClass *sc = I2C_SLAVE_GET_CLASS(slave); + + if (!sc->send_async) { + return -1; + } + + trace_i2c_send_async(slave->address, data); + + sc->send_async(slave, data); + + return 0; +} + uint8_t i2c_recv(I2CBus *bus) { uint8_t data = 0xff; @@ -297,6 +320,17 @@ void i2c_nack(I2CBus *bus) } } +void i2c_ack(I2CBus *bus) +{ + if (!bus->bh) { + return; + } + + trace_i2c_ack(); + + qemu_bh_schedule(bus->bh); +} + static int i2c_slave_post_load(void *opaque, int version_id) { I2CSlave *dev = opaque; |