diff options
| -rw-r--r-- | drivers/i2c/algos/i2c-algo-pcf.c | 85 |
1 files changed, 13 insertions, 72 deletions
diff --git a/drivers/i2c/algos/i2c-algo-pcf.c b/drivers/i2c/algos/i2c-algo-pcf.c index ab2e6f3498b..8907b019167 100644 --- a/drivers/i2c/algos/i2c-algo-pcf.c +++ b/drivers/i2c/algos/i2c-algo-pcf.c @@ -203,35 +203,6 @@ static int pcf_init_8584 (struct i2c_algo_pcf_data *adap) /* ----- Utility functions */ -static inline int try_address(struct i2c_algo_pcf_data *adap, - unsigned char addr, int retries) -{ - int i, status, ret = -1; - int wfp; - for (i=0;i<retries;i++) { - i2c_outb(adap, addr); - i2c_start(adap); - status = get_pcf(adap, 1); - if ((wfp = wait_for_pin(adap, &status)) >= 0) { - if ((status & I2C_PCF_LRB) == 0) { - i2c_stop(adap); - break; /* success! */ - } - } - if (wfp == -EINTR) { - /* arbitration lost */ - udelay(adap->udelay); - return -EINTR; - } - i2c_stop(adap); - udelay(adap->udelay); - } - DEB2(if (i) printk(KERN_DEBUG "i2c-algo-pcf.o: needed %d retries for %d\n",i, - addr)); - return ret; -} - - static int pcf_sendbytes(struct i2c_adapter *i2c_adap, const char *buf, int count, int last) { @@ -321,47 +292,19 @@ static int pcf_readbytes(struct i2c_adapter *i2c_adap, char *buf, } -static inline int pcf_doAddress(struct i2c_algo_pcf_data *adap, - struct i2c_msg *msg, int retries) +static int pcf_doAddress(struct i2c_algo_pcf_data *adap, + struct i2c_msg *msg) { unsigned short flags = msg->flags; unsigned char addr; - int ret; - if ( (flags & I2C_M_TEN) ) { - /* a ten bit address */ - addr = 0xf0 | (( msg->addr >> 7) & 0x03); - DEB2(printk(KERN_DEBUG "addr0: %d\n",addr)); - /* try extended address code...*/ - ret = try_address(adap, addr, retries); - if (ret!=1) { - printk(KERN_ERR "died at extended address code.\n"); - return -EREMOTEIO; - } - /* the remaining 8 bit address */ - i2c_outb(adap,msg->addr & 0x7f); -/* Status check comes here */ - if (ret != 1) { - printk(KERN_ERR "died at 2nd address code.\n"); - return -EREMOTEIO; - } - if ( flags & I2C_M_RD ) { - i2c_repstart(adap); - /* okay, now switch into reading mode */ - addr |= 0x01; - ret = try_address(adap, addr, retries); - if (ret!=1) { - printk(KERN_ERR "died at extended address code.\n"); - return -EREMOTEIO; - } - } - } else { /* normal 7bit address */ - addr = ( msg->addr << 1 ); - if (flags & I2C_M_RD ) - addr |= 1; - if (flags & I2C_M_REV_DIR_ADDR ) - addr ^= 1; - i2c_outb(adap, addr); - } + + addr = msg->addr << 1; + if (flags & I2C_M_RD) + addr |= 1; + if (flags & I2C_M_REV_DIR_ADDR) + addr ^= 1; + i2c_outb(adap, addr); + return 0; } @@ -390,7 +333,7 @@ static int pcf_xfer(struct i2c_adapter *i2c_adap, pmsg->flags & I2C_M_RD ? "read" : "write", pmsg->len, pmsg->addr, i + 1, num);) - ret = pcf_doAddress(adap, pmsg, i2c_adap->retries); + ret = pcf_doAddress(adap, pmsg); /* Send START */ if (i == 0) { @@ -453,7 +396,7 @@ static int pcf_xfer(struct i2c_adapter *i2c_adap, static u32 pcf_func(struct i2c_adapter *adap) { return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL | - I2C_FUNC_10BIT_ADDR | I2C_FUNC_PROTOCOL_MANGLING; + I2C_FUNC_PROTOCOL_MANGLING; } /* -----exported algorithm data: ------------------------------------- */ @@ -475,9 +418,7 @@ int i2c_pcf_add_bus(struct i2c_adapter *adap) /* register new adapter to i2c module... */ adap->algo = &pcf_algo; - - adap->timeout = 100; /* default values, should */ - adap->retries = 3; /* be replaced by defines */ + adap->timeout = 100; if ((rval = pcf_init_8584(pcf_adap))) return rval; |