diff options
Diffstat (limited to 'sys/dev/pcf/pcf.c')
-rw-r--r-- | sys/dev/pcf/pcf.c | 26 |
1 files changed, 19 insertions, 7 deletions
diff --git a/sys/dev/pcf/pcf.c b/sys/dev/pcf/pcf.c index 08b088f..0320958 100644 --- a/sys/dev/pcf/pcf.c +++ b/sys/dev/pcf/pcf.c @@ -64,6 +64,10 @@ pcf_wait_byte(struct pcf_softc *sc) return (0); } +#ifdef PCFDEBUG + printf("pcf: timeout!\n"); +#endif + return (IIC_ETIMEOUT); } @@ -132,6 +136,9 @@ pcf_repeated_start(device_t dev, u_char slave, int timeout) /* check for ack */ if (pcf_noack(sc, timeout)) { error = IIC_ENOACK; +#ifdef PCFDEBUG + printf("pcf: no ack on repeated_start!\n"); +#endif goto error; } @@ -151,8 +158,12 @@ pcf_start(device_t dev, u_char slave, int timeout) #ifdef PCFDEBUG device_printf(dev, " >> start for slave %#x\n", (unsigned)slave); #endif - if ((pcf_get_S1(sc) & nBB) == 0) + if ((pcf_get_S1(sc) & nBB) == 0) { +#ifdef PCFDEBUG + printf("pcf: busy!\n"); +#endif return (IIC_EBUSBSY); + } /* set slave address to PCF. Last bit (LSB) must be set correctly * according to transfer direction */ @@ -170,6 +181,9 @@ pcf_start(device_t dev, u_char slave, int timeout) /* check for ACK */ if (pcf_noack(sc, timeout)) { error = IIC_ENOACK; +#ifdef PCFDEBUG + printf("pcf: no ack on start!\n"); +#endif goto error; } @@ -183,23 +197,21 @@ error: void pcf_intr(void *arg) { - device_t dev = (device_t)arg; - struct pcf_softc *sc = DEVTOSOFTC(dev); - + struct pcf_softc *sc = arg; char data, status, addr; char error = 0; status = pcf_get_S1(sc); if (status & PIN) { - device_printf(dev, "spurious interrupt, status=0x%x\n", - status & 0xff); + printf("pcf: spurious interrupt, status=0x%x\n", + status & 0xff); goto error; } if (status & LAB) - device_printf(dev, "bus arbitration lost!\n"); + printf("pcf: bus arbitration lost!\n"); if (status & BER) { error = IIC_EBUSERR; |