| Message ID | 1454341418-24227-4-git-send-email-fred.konrad@greensocs.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
On Mon, Feb 1, 2016 at 7:43 AM, <fred.konrad@greensocs.com> wrote: > From: Peter Crosthwaite <crosthwaitepeter@gmail.com> > > Most of the control flow logic between send and recv (error checking > etc) is the same. Factor this out into a common send_recv() API. > This is then usable by clients, where the control logic for send > and receive differs only by a boolean. E.g. > > if (send) > i2c_send(...): > else > i2c_recv(...); > > becomes: > > i2c_send_recv(... , send); > > Signed-off-by: Peter Crosthwaite <crosthwaite.peter@gmail.com> > Changes from FK: > * Rebased on master. > * Rebased on my i2c broadcast patch. > Signed-off-by: KONRAD Frederic <fred.konrad@greensocs.com> Reviewed-by: Alistair Francis <alistair.francis@xilinx.com> Thanks, Alistair > --- > hw/i2c/core.c | 48 ++++++++++++++++++++++++++++++++---------------- > include/hw/i2c/i2c.h | 1 + > 2 files changed, 33 insertions(+), 16 deletions(-) > > diff --git a/hw/i2c/core.c b/hw/i2c/core.c > index a3921d9..a49138f 100644 > --- a/hw/i2c/core.c > +++ b/hw/i2c/core.c > @@ -148,34 +148,50 @@ void i2c_end_transfer(I2CBus *bus) > bus->broadcast = false; > } > > -int i2c_send(I2CBus *bus, uint8_t data) > +int i2c_send_recv(I2CBus *bus, uint8_t *data, bool send) > { > I2CSlaveClass *sc; > I2CNode *node; > int ret = -1; > > - QLIST_FOREACH(node, &bus->current_devs, next) { > - sc = I2C_SLAVE_GET_CLASS(node->elt); > - if (sc->send) { > - ret |= sc->send(node->elt, data); > + if (send) { > + QLIST_FOREACH(node, &bus->current_devs, next) { > + sc = I2C_SLAVE_GET_CLASS(node->elt); > + if (sc->send) { > + ret |= sc->send(node->elt, *data); > + } > + } > + return ret; > + } else { > + if ((QLIST_EMPTY(&bus->current_devs)) || (bus->broadcast)) { > + return -1; > } > + > + sc = I2C_SLAVE_GET_CLASS(QLIST_FIRST(&bus->current_devs)->elt); > + if (sc->recv) { > + ret = sc->recv(QLIST_FIRST(&bus->current_devs)->elt); > + if (ret < 0) { > + return ret; > + } else { > + *data = ret; > + return 0; > + } > + } > + return -1; > } > - return ret; > } > > -int i2c_recv(I2CBus *bus) > +int i2c_send(I2CBus *bus, uint8_t data) > { > - I2CSlaveClass *sc; > + return i2c_send_recv(bus, &data, true); > +} > > - if ((QLIST_EMPTY(&bus->current_devs)) || (bus->broadcast)) { > - return -1; > - } > +int i2c_recv(I2CBus *bus) > +{ > + uint8_t data; > + int ret = i2c_send_recv(bus, &data, false); > > - sc = I2C_SLAVE_GET_CLASS(QLIST_FIRST(&bus->current_devs)->elt); > - if (sc->recv) { > - return sc->recv(QLIST_FIRST(&bus->current_devs)->elt); > - } > - return -1; > + return ret < 0 ? ret : data; > } > > void i2c_nack(I2CBus *bus) > diff --git a/include/hw/i2c/i2c.h b/include/hw/i2c/i2c.h > index 4986ebc..c4085aa 100644 > --- a/include/hw/i2c/i2c.h > +++ b/include/hw/i2c/i2c.h > @@ -56,6 +56,7 @@ int i2c_bus_busy(I2CBus *bus); > int i2c_start_transfer(I2CBus *bus, uint8_t address, int recv); > void i2c_end_transfer(I2CBus *bus); > void i2c_nack(I2CBus *bus); > +int i2c_send_recv(I2CBus *bus, uint8_t *data, bool send); > int i2c_send(I2CBus *bus, uint8_t data); > int i2c_recv(I2CBus *bus); > > -- > 1.9.0 > >
diff --git a/hw/i2c/core.c b/hw/i2c/core.c index a3921d9..a49138f 100644 --- a/hw/i2c/core.c +++ b/hw/i2c/core.c @@ -148,34 +148,50 @@ void i2c_end_transfer(I2CBus *bus) bus->broadcast = false; } -int i2c_send(I2CBus *bus, uint8_t data) +int i2c_send_recv(I2CBus *bus, uint8_t *data, bool send) { I2CSlaveClass *sc; I2CNode *node; int ret = -1; - QLIST_FOREACH(node, &bus->current_devs, next) { - sc = I2C_SLAVE_GET_CLASS(node->elt); - if (sc->send) { - ret |= sc->send(node->elt, data); + if (send) { + QLIST_FOREACH(node, &bus->current_devs, next) { + sc = I2C_SLAVE_GET_CLASS(node->elt); + if (sc->send) { + ret |= sc->send(node->elt, *data); + } + } + return ret; + } else { + if ((QLIST_EMPTY(&bus->current_devs)) || (bus->broadcast)) { + return -1; } + + sc = I2C_SLAVE_GET_CLASS(QLIST_FIRST(&bus->current_devs)->elt); + if (sc->recv) { + ret = sc->recv(QLIST_FIRST(&bus->current_devs)->elt); + if (ret < 0) { + return ret; + } else { + *data = ret; + return 0; + } + } + return -1; } - return ret; } -int i2c_recv(I2CBus *bus) +int i2c_send(I2CBus *bus, uint8_t data) { - I2CSlaveClass *sc; + return i2c_send_recv(bus, &data, true); +} - if ((QLIST_EMPTY(&bus->current_devs)) || (bus->broadcast)) { - return -1; - } +int i2c_recv(I2CBus *bus) +{ + uint8_t data; + int ret = i2c_send_recv(bus, &data, false); - sc = I2C_SLAVE_GET_CLASS(QLIST_FIRST(&bus->current_devs)->elt); - if (sc->recv) { - return sc->recv(QLIST_FIRST(&bus->current_devs)->elt); - } - return -1; + return ret < 0 ? ret : data; } void i2c_nack(I2CBus *bus) diff --git a/include/hw/i2c/i2c.h b/include/hw/i2c/i2c.h index 4986ebc..c4085aa 100644 --- a/include/hw/i2c/i2c.h +++ b/include/hw/i2c/i2c.h @@ -56,6 +56,7 @@ int i2c_bus_busy(I2CBus *bus); int i2c_start_transfer(I2CBus *bus, uint8_t address, int recv); void i2c_end_transfer(I2CBus *bus); void i2c_nack(I2CBus *bus); +int i2c_send_recv(I2CBus *bus, uint8_t *data, bool send); int i2c_send(I2CBus *bus, uint8_t data); int i2c_recv(I2CBus *bus);