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i2c: have I2C receive operation return uint8_t

Browse source 
It is never supposed to fail and cannot return an error, so just
have it return the proper type.  Have it return 0xff on nothing
available, since that's what would happen on a real bus.

Signed-off-by: Corey Minyard <cminyard@mvista.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Tested-by: Philippe Mathieu-Daudé <philmd@redhat.com>
This commit is contained in:
Corey Minyard 2018-11-14 11:50:50 -06:00
parent 93198b6cad
commit 2ac4c5f4d2
19 changed files with 37 additions and 44 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

2
hw/arm/pxa2xx.c
View file

@ -1286,7 +1286,7 @@ static int pxa2xx_i2c_event(I2CSlave *i2c, enum i2c_event event)
return 0;
}
static int pxa2xx_i2c_rx(I2CSlave *i2c)
static uint8_t pxa2xx_i2c_rx(I2CSlave *i2c)
{
PXA2xxI2CSlaveState *slave = PXA2XX_I2C_SLAVE(i2c);
PXA2xxI2CState *s = slave->host;

4
hw/arm/tosa.c
View file

@ -197,10 +197,10 @@ static int tosa_dac_event(I2CSlave *i2c, enum i2c_event event)
return 0;
}
static int tosa_dac_recv(I2CSlave *s)
static uint8_t tosa_dac_recv(I2CSlave *s)
{
printf("%s: recv not supported!!!\n", __func__);
return -1;
return 0xff;
}
static void tosa_tg_init(PXA2xxState *cpu)

2
hw/arm/z2.c
View file

@ -243,7 +243,7 @@ static int aer915_event(I2CSlave *i2c, enum i2c_event event)
return 0;
}
static int aer915_recv(I2CSlave *slave)
static uint8_t aer915_recv(I2CSlave *slave)
{
AER915State *s = AER915(slave);
int retval = 0x00;

2
hw/audio/wm8750.c
View file

@ -561,7 +561,7 @@ static int wm8750_tx(I2CSlave *i2c, uint8_t data)
return 0;
}
static int wm8750_rx(I2CSlave *i2c)
static uint8_t wm8750_rx(I2CSlave *i2c)
{
return 0x00;
}

2
hw/display/sii9022.c
View file

@ -79,7 +79,7 @@ static int sii9022_event(I2CSlave *i2c, enum i2c_event event)
return 0;
}
static int sii9022_rx(I2CSlave *i2c)
static uint8_t sii9022_rx(I2CSlave *i2c)
{
sii9022_state *s = SII9022(i2c);
uint8_t res = 0x00;

4
hw/display/ssd0303.c
View file

@ -62,10 +62,10 @@ typedef struct {
uint8_t framebuffer[132*8];
} ssd0303_state;
static int ssd0303_recv(I2CSlave *i2c)
static uint8_t ssd0303_recv(I2CSlave *i2c)
{
BADF("Reads not implemented\n");
return -1;
return 0xff;
}
static int ssd0303_send(I2CSlave *i2c, uint8_t data)

2
hw/gpio/max7310.c
View file

@ -39,7 +39,7 @@ static void max7310_reset(DeviceState *dev)
s->command = 0x00;
}
static int max7310_rx(I2CSlave *i2c)
static uint8_t max7310_rx(I2CSlave *i2c)
{
MAX7310State *s = MAX7310(i2c);

32
hw/i2c/core.c
View file

@ -191,23 +191,17 @@ int i2c_send_recv(I2CBus *bus, uint8_t *data, bool send)
}
return ret ? -1 : 0;
} 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) {
s = QLIST_FIRST(&bus->current_devs)->elt;
ret = sc->recv(s);
trace_i2c_recv(s->address, ret);
if (ret < 0) {
return ret;
} else {
*data = ret;
return 0;
ret = 0xff;
if (!QLIST_EMPTY(&bus->current_devs) && !bus->broadcast) {
sc = I2C_SLAVE_GET_CLASS(QLIST_FIRST(&bus->current_devs)->elt);
if (sc->recv) {
s = QLIST_FIRST(&bus->current_devs)->elt;
ret = sc->recv(s);
trace_i2c_recv(s->address, ret);
}
}
return -1;
*data = ret;
return 0;
}
}
@ -216,12 +210,12 @@ int i2c_send(I2CBus *bus, uint8_t data)
return i2c_send_recv(bus, &data, true);
}
int i2c_recv(I2CBus *bus)
uint8_t i2c_recv(I2CBus *bus)
{
uint8_t data;
int ret = i2c_send_recv(bus, &data, false);
uint8_t data = 0xff;
return ret < 0 ? ret : data;
i2c_send_recv(bus, &data, false);
return data;
}
void i2c_nack(I2CBus *bus)

2
hw/i2c/i2c-ddc.c
View file

@ -51,7 +51,7 @@ static int i2c_ddc_event(I2CSlave *i2c, enum i2c_event event)
return 0;
}
static int i2c_ddc_rx(I2CSlave *i2c)
static uint8_t i2c_ddc_rx(I2CSlave *i2c)
{
I2CDDCState *s = I2CDDC(i2c);

4
hw/i2c/smbus_slave.c
View file

@ -156,11 +156,11 @@ static int smbus_i2c_event(I2CSlave *s, enum i2c_event event)
return 0;
}
static int smbus_i2c_recv(I2CSlave *s)
static uint8_t smbus_i2c_recv(I2CSlave *s)
{
SMBusDevice *dev = SMBUS_DEVICE(s);
SMBusDeviceClass *sc = SMBUS_DEVICE_GET_CLASS(dev);
int ret;
uint8_t ret;
switch (dev->mode) {
case SMBUS_RECV_BYTE:

2
hw/input/lm832x.c
View file

@ -401,7 +401,7 @@ static int lm_i2c_event(I2CSlave *i2c, enum i2c_event event)
return 0;
}
static int lm_i2c_rx(I2CSlave *i2c)
static uint8_t lm_i2c_rx(I2CSlave *i2c)
{
LM823KbdState *s = LM8323(i2c);

2
hw/misc/pca9552.c
View file

@ -115,7 +115,7 @@ static void pca9552_autoinc(PCA9552State *s)
}
}
static int pca9552_recv(I2CSlave *i2c)
static uint8_t pca9552_recv(I2CSlave *i2c)
{
PCA9552State *s = PCA9552(i2c);
uint8_t ret;

2
hw/misc/tmp105.c
View file

@ -147,7 +147,7 @@ static void tmp105_write(TMP105State *s)
}
}
static int tmp105_rx(I2CSlave *i2c)
static uint8_t tmp105_rx(I2CSlave *i2c)
{
TMP105State *s = TMP105(i2c);

2
hw/misc/tmp421.c
View file

@ -249,7 +249,7 @@ static void tmp421_write(TMP421State *s)
}
}
static int tmp421_rx(I2CSlave *i2c)
static uint8_t tmp421_rx(I2CSlave *i2c)
{
TMP421State *s = TMP421(i2c);

4
hw/nvram/eeprom_at24c.c
View file

@ -74,10 +74,10 @@ int at24c_eeprom_event(I2CSlave *s, enum i2c_event event)
}
static
int at24c_eeprom_recv(I2CSlave *s)
uint8_t at24c_eeprom_recv(I2CSlave *s)
{
EEPROMState *ee = AT24C_EE(s);
int ret;
uint8_t ret;
ret = ee->mem[ee->cur];

2
hw/timer/ds1338.c
View file

@ -117,7 +117,7 @@ static int ds1338_event(I2CSlave *i2c, enum i2c_event event)
return 0;
}
static int ds1338_recv(I2CSlave *i2c)
static uint8_t ds1338_recv(I2CSlave *i2c)
{
DS1338State *s = DS1338(i2c);
uint8_t res;

2
hw/timer/m41t80.c
View file

@ -40,7 +40,7 @@ static int m41t80_send(I2CSlave *i2c, uint8_t data)
return 0;
}
static int m41t80_recv(I2CSlave *i2c)
static uint8_t m41t80_recv(I2CSlave *i2c)
{
M41t80State *s = M41T80(i2c);
struct tm now;

2
hw/timer/twl92230.c
View file

@ -737,7 +737,7 @@ static int menelaus_tx(I2CSlave *i2c, uint8_t data)
return 0;
}
static int menelaus_rx(I2CSlave *i2c)
static uint8_t menelaus_rx(I2CSlave *i2c)
{
MenelausState *s = TWL92230(i2c);

7
include/hw/i2c/i2c.h
View file

@ -33,10 +33,9 @@ typedef struct I2CSlaveClass {
/*
* Slave to master. This cannot fail, the device should always
* return something here. Negative values probably result in 0xff
* and a possible log from the driver, and shouldn't be used.
* return something here.
*/
int (*recv)(I2CSlave *s);
uint8_t (*recv)(I2CSlave *s);
/*
* Notify the slave of a bus state change. For start event,
@ -78,7 +77,7 @@ 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);
uint8_t i2c_recv(I2CBus *bus);
DeviceState *i2c_create_slave(I2CBus *bus, const char *name, uint8_t addr);