1 files changed, 25 insertions, 80 deletions

diff --git a/drivers/i2c/algos/i2c-algo-pcf.c b/drivers/i2c/algos/i2c-algo-pcf.c
index fd563e845d4b..a87ecea7f510 100644
--- a/drivers/i2c/algos/i2c-algo-pcf.c
+++ b/drivers/i2c/algos/i2c-algo-pcf.c
@@ -23,17 +23,8 @@
 #include "i2c-algo-pcf.h"
 
 
-#define DEB2(x) if (i2c_debug >= 2) x
-#define DEB3(x) if (i2c_debug >= 3) x /* print several statistical values */
-#define DEBPROTO(x) if (i2c_debug >= 9) x;
-	/* debug the protocol by showing transferred bits */
 #define DEF_TIMEOUT 16
 
-/*
- * module parameters:
- */
-static int i2c_debug;
-
 /* setting states on the bus with the right timing: */
 
 #define set_pcf(adap, ctl, val) adap->setpcf(adap->data, ctl, val)
@@ -47,27 +38,21 @@ static int i2c_debug;
 
 static void i2c_start(struct i2c_algo_pcf_data *adap)
 {
-	DEBPROTO(printk(KERN_DEBUG "S "));
 	set_pcf(adap, 1, I2C_PCF_START);
 }
 
 static void i2c_repstart(struct i2c_algo_pcf_data *adap)
 {
-	DEBPROTO(printk(" Sr "));
 	set_pcf(adap, 1, I2C_PCF_REPSTART);
 }
 
 static void i2c_stop(struct i2c_algo_pcf_data *adap)
 {
-	DEBPROTO(printk("P\n"));
 	set_pcf(adap, 1, I2C_PCF_STOP);
 }
 
 static void handle_lab(struct i2c_algo_pcf_data *adap, const int *status)
 {
-	DEB2(printk(KERN_INFO
-		"i2c-algo-pcf.o: lost arbitration (CSR 0x%02x)\n",
-		*status));
 	/*
 	 * Cleanup from LAB -- reset and enable ESO.
 	 * This resets the PCF8584; since we've lost the bus, no
@@ -88,9 +73,6 @@ static void handle_lab(struct i2c_algo_pcf_data *adap, const int *status)
 	if (adap->lab_mdelay)
 		mdelay(adap->lab_mdelay);
 
-	DEB2(printk(KERN_INFO
-		"i2c-algo-pcf.o: reset LAB condition (CSR 0x%02x)\n",
-		get_pcf(adap, 1)));
 }
 
 static int wait_for_bb(struct i2c_algo_pcf_data *adap)
@@ -147,56 +129,48 @@ static int wait_for_pin(struct i2c_algo_pcf_data *adap, int *status)
  *
  * vdovikin: added detect code for PCF8584
  */
-static int pcf_init_8584 (struct i2c_algo_pcf_data *adap)
+static int pcf_init_8584(struct i2c_algo_pcf_data *adap)
 {
 	unsigned char temp;
 
-	DEB3(printk(KERN_DEBUG "i2c-algo-pcf.o: PCF state 0x%02x\n",
-				get_pcf(adap, 1)));
-
 	/* S1=0x80: S0 selected, serial interface off */
 	set_pcf(adap, 1, I2C_PCF_PIN);
 	/*
 	 * check to see S1 now used as R/W ctrl -
 	 * PCF8584 does that when ESO is zero
 	 */
-	if (((temp = get_pcf(adap, 1)) & 0x7f) != (0)) {
-		DEB2(printk(KERN_ERR "i2c-algo-pcf.o: PCF detection failed -- can't select S0 (0x%02x).\n", temp));
+	temp = get_pcf(adap, 1);
+	if ((temp & 0x7f) != 0)
 		return -ENXIO; /* definitely not PCF8584 */
-	}
 
 	/* load own address in S0, effective address is (own << 1) */
 	i2c_outb(adap, get_own(adap));
 	/* check it's really written */
-	if ((temp = i2c_inb(adap)) != get_own(adap)) {
-		DEB2(printk(KERN_ERR "i2c-algo-pcf.o: PCF detection failed -- can't set S0 (0x%02x).\n", temp));
+	temp = i2c_inb(adap);
+	if (temp != get_own(adap))
 		return -ENXIO;
-	}
 
 	/* S1=0xA0, next byte in S2 */
 	set_pcf(adap, 1, I2C_PCF_PIN | I2C_PCF_ES1);
 	/* check to see S2 now selected */
-	if (((temp = get_pcf(adap, 1)) & 0x7f) != I2C_PCF_ES1) {
-		DEB2(printk(KERN_ERR "i2c-algo-pcf.o: PCF detection failed -- can't select S2 (0x%02x).\n", temp));
+	temp = get_pcf(adap, 1);
+	if ((temp & 0x7f) != I2C_PCF_ES1)
 		return -ENXIO;
-	}
 
 	/* load clock register S2 */
 	i2c_outb(adap, get_clock(adap));
 	/* check it's really written, the only 5 lowest bits does matter */
-	if (((temp = i2c_inb(adap)) & 0x1f) != get_clock(adap)) {
-		DEB2(printk(KERN_ERR "i2c-algo-pcf.o: PCF detection failed -- can't set S2 (0x%02x).\n", temp));
+	temp = i2c_inb(adap);
+	if ((temp & 0x1f) != get_clock(adap))
 		return -ENXIO;
-	}
 
 	/* Enable serial interface, idle, S0 selected */
 	set_pcf(adap, 1, I2C_PCF_IDLE);
 
 	/* check to see PCF is really idled and we can access status register */
-	if ((temp = get_pcf(adap, 1)) != (I2C_PCF_PIN | I2C_PCF_BB)) {
-		DEB2(printk(KERN_ERR "i2c-algo-pcf.o: PCF detection failed -- can't select S1` (0x%02x).\n", temp));
+	temp = get_pcf(adap, 1);
+	if (temp != (I2C_PCF_PIN | I2C_PCF_BB))
 		return -ENXIO;
-	}
 
 	printk(KERN_DEBUG "i2c-algo-pcf.o: detected and initialized PCF8584.\n");
 
@@ -209,9 +183,7 @@ static int pcf_sendbytes(struct i2c_adapter *i2c_adap, const char *buf,
 	struct i2c_algo_pcf_data *adap = i2c_adap->algo_data;
 	int wrcount, status, timeout;
 
-	for (wrcount=0; wrcount<count; ++wrcount) {
-		DEB2(dev_dbg(&i2c_adap->dev, "i2c_write: writing %2.2X\n",
-				buf[wrcount] & 0xff));
+	for (wrcount = 0; wrcount < count; ++wrcount) {
 		i2c_outb(adap, buf[wrcount]);
 		timeout = wait_for_pin(adap, &status);
 		if (timeout) {
@@ -246,7 +218,8 @@ static int pcf_readbytes(struct i2c_adapter *i2c_adap, char *buf,
 	/* increment number of bytes to read by one -- read dummy byte */
 	for (i = 0; i <= count; i++) {
 
-		if ((wfp = wait_for_pin(adap, &status))) {
+		wfp = wait_for_pin(adap, &status);
+		if (wfp) {
 			if (wfp == -EINTR)
 				return -EINTR; /* arbitration lost */
 
@@ -280,7 +253,7 @@ static int pcf_readbytes(struct i2c_adapter *i2c_adap, char *buf,
 }
 
 
-static int pcf_doAddress(struct i2c_algo_pcf_data *adap,
+static void pcf_send_address(struct i2c_algo_pcf_data *adap,
 			 struct i2c_msg *msg)
 {
 	unsigned char addr = i2c_8bit_addr_from_msg(msg);
@@ -288,8 +261,6 @@ static int pcf_doAddress(struct i2c_algo_pcf_data *adap,
 	if (msg->flags & I2C_M_REV_DIR_ADDR)
 		addr ^= 1;
 	i2c_outb(adap, addr);
-
-	return 0;
 }
 
 static int pcf_xfer(struct i2c_adapter *i2c_adap,
@@ -299,7 +270,7 @@ static int pcf_xfer(struct i2c_adapter *i2c_adap,
 	struct i2c_algo_pcf_data *adap = i2c_adap->algo_data;
 	struct i2c_msg *pmsg;
 	int i;
-	int ret=0, timeout, status;
+	int timeout, status;
 
 	if (adap->xfer_begin)
 		adap->xfer_begin(adap->data);
@@ -307,20 +278,15 @@ static int pcf_xfer(struct i2c_adapter *i2c_adap,
 	/* Check for bus busy */
 	timeout = wait_for_bb(adap);
 	if (timeout) {
-		DEB2(printk(KERN_ERR "i2c-algo-pcf.o: "
-			    "Timeout waiting for BB in pcf_xfer\n");)
 		i = -EIO;
 		goto out;
 	}
 
-	for (i = 0;ret >= 0 && i < num; i++) {
-		pmsg = &msgs[i];
-
-		DEB2(printk(KERN_DEBUG "i2c-algo-pcf.o: Doing %s %d bytes to 0x%02x - %d of %d messages\n",
-		     str_read_write(pmsg->flags & I2C_M_RD),
-		     pmsg->len, pmsg->addr, i + 1, num);)
+	for (i = 0; i < num; i++) {
+		int ret;
 
-		ret = pcf_doAddress(adap, pmsg);
+		pmsg = &msgs[i];
+		pcf_send_address(adap, pmsg);
 
 		/* Send START */
 		if (i == 0)
@@ -335,8 +301,6 @@ static int pcf_xfer(struct i2c_adapter *i2c_adap,
 				goto out;
 			}
 			i2c_stop(adap);
-			DEB2(printk(KERN_ERR "i2c-algo-pcf.o: Timeout waiting "
-				    "for PIN(1) in pcf_xfer\n");)
 			i = -EREMOTEIO;
 			goto out;
 		}
@@ -344,35 +308,21 @@ static int pcf_xfer(struct i2c_adapter *i2c_adap,
 		/* Check LRB (last rcvd bit - slave ack) */
 		if (status & I2C_PCF_LRB) {
 			i2c_stop(adap);
-			DEB2(printk(KERN_ERR "i2c-algo-pcf.o: No LRB(1) in pcf_xfer\n");)
 			i = -EREMOTEIO;
 			goto out;
 		}
 
-		DEB3(printk(KERN_DEBUG "i2c-algo-pcf.o: Msg %d, addr=0x%x, flags=0x%x, len=%d\n",
-			    i, msgs[i].addr, msgs[i].flags, msgs[i].len);)
 
 		if (pmsg->flags & I2C_M_RD) {
 			ret = pcf_readbytes(i2c_adap, pmsg->buf, pmsg->len,
 					    (i + 1 == num));
-
-			if (ret != pmsg->len) {
-				DEB2(printk(KERN_DEBUG "i2c-algo-pcf.o: fail: "
-					    "only read %d bytes.\n",ret));
-			} else {
-				DEB2(printk(KERN_DEBUG "i2c-algo-pcf.o: read %d bytes.\n",ret));
-			}
 		} else {
 			ret = pcf_sendbytes(i2c_adap, pmsg->buf, pmsg->len,
 					    (i + 1 == num));
-
-			if (ret != pmsg->len) {
-				DEB2(printk(KERN_DEBUG "i2c-algo-pcf.o: fail: "
-					    "only wrote %d bytes.\n",ret));
-			} else {
-				DEB2(printk(KERN_DEBUG "i2c-algo-pcf.o: wrote %d bytes.\n",ret));
-			}
 		}
+
+		if (ret < 0)
+			goto out;
 	}
 
 out:
@@ -401,12 +351,11 @@ int i2c_pcf_add_bus(struct i2c_adapter *adap)
 	struct i2c_algo_pcf_data *pcf_adap = adap->algo_data;
 	int rval;
 
-	DEB2(dev_dbg(&adap->dev, "hw routines registered.\n"));
-
 	/* register new adapter to i2c module... */
 	adap->algo = &pcf_algo;
 
-	if ((rval = pcf_init_8584(pcf_adap)))
+	rval = pcf_init_8584(pcf_adap);
+	if (rval)
 		return rval;
 
 	rval = i2c_add_adapter(adap);
@@ -418,7 +367,3 @@ EXPORT_SYMBOL(i2c_pcf_add_bus);
 MODULE_AUTHOR("Hans Berglund <hb@spacetec.no>");
 MODULE_DESCRIPTION("I2C-Bus PCF8584 algorithm");
 MODULE_LICENSE("GPL");
-
-module_param(i2c_debug, int, S_IRUGO | S_IWUSR);
-MODULE_PARM_DESC(i2c_debug,
-	"debug level - 0 off; 1 normal; 2,3 more verbose; 9 pcf-protocol");