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i2c: Bus drivers return -Errno not -1

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Tighten error paths used by various i2c adapters (mostly x86) so
they return real fault/errno codes instead of a "-1" (which is
most often interpreted as "-EPERM").  Build tested, with eyeball
review.

One minor initial goal is to have adapters consistently return
the code "-ENXIO" when addressing a device doesn't get an ACK
response, at least in the probe paths where they are already
good at stifling related logspam.

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
This commit is contained in:
David Brownell 2008-07-14 22:38:25 +02:00 committed by Jean Delvare
parent 6ea438ec8d
commit 97140342e6
15 changed files with 191 additions and 148 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

4
drivers/i2c/algos/i2c-algo-bit.c
View file

@ -320,7 +320,7 @@ static int try_address(struct i2c_adapter *i2c_adap,
unsigned char addr, int retries)
{
struct i2c_algo_bit_data *adap = i2c_adap->algo_data;
int i, ret = -1;
int i, ret = 0;
for (i = 0; i <= retries; i++) {
ret = i2c_outb(i2c_adap, addr);
@ -508,7 +508,7 @@ static int bit_doAddress(struct i2c_adapter *i2c_adap, struct i2c_msg *msg)
addr ^= 1;
ret = try_address(i2c_adap, addr, retries);
if ((ret != 1) && !nak_ok)
return -EREMOTEIO;
return -ENXIO;
}
return 0;

22
drivers/i2c/busses/i2c-ali1535.c
View file

@ -259,7 +259,7 @@ static int ali1535_transaction(struct i2c_adapter *adap)
dev_err(&adap->dev,
"SMBus reset failed! (0x%02x) - controller or "
"device on bus is probably hung\n", temp);
return -1;
return -EBUSY;
}
} else {
/* check and clear done bit */
@ -281,12 +281,12 @@ static int ali1535_transaction(struct i2c_adapter *adap)
/* If the SMBus is still busy, we give up */
if (timeout >= MAX_TIMEOUT) {
result = -1;
result = -ETIMEDOUT;
dev_err(&adap->dev, "SMBus Timeout!\n");
}
if (temp & ALI1535_STS_FAIL) {
result = -1;
result = -EIO;
dev_dbg(&adap->dev, "Error: Failed bus transaction\n");
}
@ -295,7 +295,7 @@ static int ali1535_transaction(struct i2c_adapter *adap)
* do a printk. This means that bus collisions go unreported.
*/
if (temp & ALI1535_STS_BUSERR) {
result = -1;
result = -ENXIO;
dev_dbg(&adap->dev,
"Error: no response or bus collision ADD=%02x\n",
inb_p(SMBHSTADD));
@ -303,13 +303,13 @@ static int ali1535_transaction(struct i2c_adapter *adap)
/* haven't ever seen this */
if (temp & ALI1535_STS_DEV) {
result = -1;
result = -EIO;
dev_err(&adap->dev, "Error: device error\n");
}
/* check to see if the "command complete" indication is set */
if (!(temp & ALI1535_STS_DONE)) {
result = -1;
result = -ETIMEDOUT;
dev_err(&adap->dev, "Error: command never completed\n");
}
@ -332,7 +332,7 @@ static int ali1535_transaction(struct i2c_adapter *adap)
return result;
}
/* Return -1 on error. */
/* Return negative errno on error. */
static s32 ali1535_access(struct i2c_adapter *adap, u16 addr,
unsigned short flags, char read_write, u8 command,
int size, union i2c_smbus_data *data)
@ -359,7 +359,7 @@ static s32 ali1535_access(struct i2c_adapter *adap, u16 addr,
switch (size) {
case I2C_SMBUS_PROC_CALL:
dev_err(&adap->dev, "I2C_SMBUS_PROC_CALL not supported!\n");
result = -1;
result = -EOPNOTSUPP;
goto EXIT;
case I2C_SMBUS_QUICK:
outb_p(((addr & 0x7f) << 1) | (read_write & 0x01),
@ -420,11 +420,9 @@ static s32 ali1535_access(struct i2c_adapter *adap, u16 addr,
break;
}
if (ali1535_transaction(adap)) {
/* Error in transaction */
result = -1;
result = ali1535_transaction(adap);
if (result)
goto EXIT;
}
if ((read_write == I2C_SMBUS_WRITE) || (size == ALI1535_QUICK)) {
result = 0;

23
drivers/i2c/busses/i2c-ali1563.c
View file

@ -67,6 +67,7 @@ static int ali1563_transaction(struct i2c_adapter * a, int size)
{
u32 data;
int timeout;
int status = -EIO;
dev_dbg(&a->dev, "Transaction (pre): STS=%02x, CNTL1=%02x, "
"CNTL2=%02x, CMD=%02x, ADD=%02x, DAT0=%02x, DAT1=%02x\n",
@ -103,13 +104,15 @@ static int ali1563_transaction(struct i2c_adapter * a, int size)
/* Issue 'kill' to host controller */
outb_p(HST_CNTL2_KILL,SMB_HST_CNTL2);
data = inb_p(SMB_HST_STS);
status = -ETIMEDOUT;
}
/* device error - no response, ignore the autodetection case */
if ((data & HST_STS_DEVERR) && (size != HST_CNTL2_QUICK)) {
dev_err(&a->dev, "Device error!\n");
if (data & HST_STS_DEVERR) {
if (size != HST_CNTL2_QUICK)
dev_err(&a->dev, "Device error!\n");
status = -ENXIO;
}
/* bus collision */
if (data & HST_STS_BUSERR) {
dev_err(&a->dev, "Bus collision!\n");
@ -122,13 +125,14 @@ static int ali1563_transaction(struct i2c_adapter * a, int size)
outb_p(0x0,SMB_HST_CNTL2);
}
return -1;
return status;
}
static int ali1563_block_start(struct i2c_adapter * a)
{
u32 data;
int timeout;
int status = -EIO;
dev_dbg(&a->dev, "Block (pre): STS=%02x, CNTL1=%02x, "
"CNTL2=%02x, CMD=%02x, ADD=%02x, DAT0=%02x, DAT1=%02x\n",
@ -164,13 +168,20 @@ static int ali1563_block_start(struct i2c_adapter * a)
if (timeout && !(data & HST_STS_BAD))
return 0;
if (timeout == 0)
status = -ETIMEDOUT;
if (data & HST_STS_DEVERR)
status = -ENXIO;
dev_err(&a->dev, "SMBus Error: %s%s%s%s%s\n",
timeout ? "Timeout " : "",
timeout ? "" : "Timeout ",
data & HST_STS_FAIL ? "Transaction Failed " : "",
data & HST_STS_BUSERR ? "No response or Bus Collision " : "",
data & HST_STS_DEVERR ? "Device Error " : "",
!(data & HST_STS_DONE) ? "Transaction Never Finished " : "");
return -1;
return status;
}
static int ali1563_block(struct i2c_adapter * a, union i2c_smbus_data * data, u8 rw)

19
drivers/i2c/busses/i2c-ali15x3.c
View file

@ -282,7 +282,7 @@ static int ali15x3_transaction(struct i2c_adapter *adap)
dev_err(&adap->dev, "SMBus reset failed! (0x%02x) - "
"controller or device on bus is probably hung\n",
temp);
return -1;
return -EBUSY;
}
} else {
/* check and clear done bit */
@ -304,12 +304,12 @@ static int ali15x3_transaction(struct i2c_adapter *adap)
/* If the SMBus is still busy, we give up */
if (timeout >= MAX_TIMEOUT) {
result = -1;
result = -ETIMEDOUT;
dev_err(&adap->dev, "SMBus Timeout!\n");
}
if (temp & ALI15X3_STS_TERM) {
result = -1;
result = -EIO;
dev_dbg(&adap->dev, "Error: Failed bus transaction\n");
}
@ -320,7 +320,7 @@ static int ali15x3_transaction(struct i2c_adapter *adap)
This means that bus collisions go unreported.
*/
if (temp & ALI15X3_STS_COLL) {
result = -1;
result = -ENXIO;
dev_dbg(&adap->dev,
"Error: no response or bus collision ADD=%02x\n",
inb_p(SMBHSTADD));
@ -328,7 +328,7 @@ static int ali15x3_transaction(struct i2c_adapter *adap)
/* haven't ever seen this */
if (temp & ALI15X3_STS_DEV) {
result = -1;
result = -EIO;
dev_err(&adap->dev, "Error: device error\n");
}
dev_dbg(&adap->dev, "Transaction (post): STS=%02x, CNT=%02x, CMD=%02x, "
@ -338,7 +338,7 @@ static int ali15x3_transaction(struct i2c_adapter *adap)
return result;
}
/* Return -1 on error. */
/* Return negative errno on error. */
static s32 ali15x3_access(struct i2c_adapter * adap, u16 addr,
unsigned short flags, char read_write, u8 command,
int size, union i2c_smbus_data * data)
@ -364,7 +364,7 @@ static s32 ali15x3_access(struct i2c_adapter * adap, u16 addr,
switch (size) {
case I2C_SMBUS_PROC_CALL:
dev_err(&adap->dev, "I2C_SMBUS_PROC_CALL not supported!\n");
return -1;
return -EOPNOTSUPP;
case I2C_SMBUS_QUICK:
outb_p(((addr & 0x7f) << 1) | (read_write & 0x01),
SMBHSTADD);
@ -421,8 +421,9 @@ static s32 ali15x3_access(struct i2c_adapter * adap, u16 addr,
outb_p(size, SMBHSTCNT); /* output command */
if (ali15x3_transaction(adap)) /* Error in transaction */
return -1;
temp = ali15x3_transaction(adap);
if (temp)
return temp;
if ((read_write == I2C_SMBUS_WRITE) || (size == ALI15X3_QUICK))
return 0;

4
drivers/i2c/busses/i2c-amd756-s4882.c
View file

@ -58,7 +58,7 @@ static s32 amd756_access_virt0(struct i2c_adapter * adap, u16 addr,
/* We exclude the multiplexed addresses */
if (addr == 0x4c || (addr & 0xfc) == 0x50 || (addr & 0xfc) == 0x30
|| addr == 0x18)
return -1;
return -ENXIO;
mutex_lock(&amd756_lock);
@ -86,7 +86,7 @@ static inline s32 amd756_access_channel(struct i2c_adapter * adap, u16 addr,
/* We exclude the non-multiplexed addresses */
if (addr != 0x4c && (addr & 0xfc) != 0x50 && (addr & 0xfc) != 0x30)
return -1;
return -ENXIO;
mutex_lock(&amd756_lock);

18
drivers/i2c/busses/i2c-amd756.c
View file

@ -151,17 +151,17 @@ static int amd756_transaction(struct i2c_adapter *adap)
}
if (temp & GS_PRERR_STS) {
result = -1;
result = -ENXIO;
dev_dbg(&adap->dev, "SMBus Protocol error (no response)!\n");
}
if (temp & GS_COL_STS) {
result = -1;
result = -EIO;
dev_warn(&adap->dev, "SMBus collision!\n");
}
if (temp & GS_TO_STS) {
result = -1;
result = -ETIMEDOUT;
dev_dbg(&adap->dev, "SMBus protocol timeout!\n");
}
@ -189,22 +189,23 @@ static int amd756_transaction(struct i2c_adapter *adap)
outw_p(inw(SMB_GLOBAL_ENABLE) | GE_ABORT, SMB_GLOBAL_ENABLE);
msleep(100);
outw_p(GS_CLEAR_STS, SMB_GLOBAL_STATUS);
return -1;
return -EIO;
}
/* Return -1 on error. */
/* Return negative errno on error. */
static s32 amd756_access(struct i2c_adapter * adap, u16 addr,
unsigned short flags, char read_write,
u8 command, int size, union i2c_smbus_data * data)
{
int i, len;
int status;
/** TODO: Should I supporte the 10-bit transfers? */
switch (size) {
case I2C_SMBUS_PROC_CALL:
dev_dbg(&adap->dev, "I2C_SMBUS_PROC_CALL not supported!\n");
/* TODO: Well... It is supported, I'm just not sure what to do here... */
return -1;
return -EOPNOTSUPP;
case I2C_SMBUS_QUICK:
outw_p(((addr & 0x7f) << 1) | (read_write & 0x01),
SMB_HOST_ADDRESS);
@ -256,8 +257,9 @@ static s32 amd756_access(struct i2c_adapter * adap, u16 addr,
/* How about enabling interrupts... */
outw_p(size & GE_CYC_TYPE_MASK, SMB_GLOBAL_ENABLE);
if (amd756_transaction(adap)) /* Error in transaction */
return -1;
status = amd756_transaction(adap);
if (status)
return status;
if ((read_write == I2C_SMBUS_WRITE) || (size == AMD756_QUICK))
return 0;

47
drivers/i2c/busses/i2c-amd8111.c
View file

@ -77,7 +77,7 @@ static unsigned int amd_ec_wait_write(struct amd_smbus *smbus)
if (!timeout) {
dev_warn(&smbus->dev->dev,
"Timeout while waiting for IBF to clear\n");
return -1;
return -ETIMEDOUT;
}
return 0;
@ -93,7 +93,7 @@ static unsigned int amd_ec_wait_read(struct amd_smbus *smbus)
if (!timeout) {
dev_warn(&smbus->dev->dev,
"Timeout while waiting for OBF to set\n");
return -1;
return -ETIMEDOUT;
}
return 0;
@ -102,16 +102,21 @@ static unsigned int amd_ec_wait_read(struct amd_smbus *smbus)
static unsigned int amd_ec_read(struct amd_smbus *smbus, unsigned char address,
unsigned char *data)
{
if (amd_ec_wait_write(smbus))
return -1;
int status;
status = amd_ec_wait_write(smbus);
if (status)
return status;
outb(AMD_EC_CMD_RD, smbus->base + AMD_EC_CMD);
if (amd_ec_wait_write(smbus))
return -1;
status = amd_ec_wait_write(smbus);
if (status)
return status;
outb(address, smbus->base + AMD_EC_DATA);
if (amd_ec_wait_read(smbus))
return -1;
status = amd_ec_wait_read(smbus);
if (status)
return status;
*data = inb(smbus->base + AMD_EC_DATA);
return 0;
@ -120,16 +125,21 @@ static unsigned int amd_ec_read(struct amd_smbus *smbus, unsigned char address,
static unsigned int amd_ec_write(struct amd_smbus *smbus, unsigned char address,
unsigned char data)
{
if (amd_ec_wait_write(smbus))
return -1;
int status;
status = amd_ec_wait_write(smbus);
if (status)
return status;
outb(AMD_EC_CMD_WR, smbus->base + AMD_EC_CMD);
if (amd_ec_wait_write(smbus))
return -1;
status = amd_ec_wait_write(smbus);
if (status)
return status;
outb(address, smbus->base + AMD_EC_DATA);
if (amd_ec_wait_write(smbus))
return -1;
status = amd_ec_wait_write(smbus);
if (status)
return status;
outb(data, smbus->base + AMD_EC_DATA);
return 0;
@ -267,12 +277,17 @@ static s32 amd8111_access(struct i2c_adapter * adap, u16 addr,
default:
dev_warn(&adap->dev, "Unsupported transaction %d\n", size);
return -1;
return -EOPNOTSUPP;
}
amd_ec_write(smbus, AMD_SMB_ADDR, addr << 1);
amd_ec_write(smbus, AMD_SMB_PRTCL, protocol);
/* FIXME this discards status from ec_read(); so temp[0] will
* hold stack garbage ... the rest of this routine will act
* nonsensically. Ignored ec_write() status might explain
* some such failures...
*/
amd_ec_read(smbus, AMD_SMB_STS, temp + 0);
if (~temp[0] & AMD_SMB_STS_DONE) {
@ -286,7 +301,7 @@ static s32 amd8111_access(struct i2c_adapter * adap, u16 addr,
}
if ((~temp[0] & AMD_SMB_STS_DONE) || (temp[0] & AMD_SMB_STS_STATUS))
return -1;
return -EIO;
if (read_write == I2C_SMBUS_WRITE)
return 0;

44
drivers/i2c/busses/i2c-i801.c
View file

@ -151,7 +151,7 @@ static int i801_transaction(int xact)
outb_p(temp, SMBHSTSTS);
if ((temp = (0x1f & inb_p(SMBHSTSTS))) != 0x00) {
dev_dbg(&I801_dev->dev, "Failed! (%02x)\n", temp);
return -1;
return -EBUSY;
} else {
dev_dbg(&I801_dev->dev, "Successful!\n");
}
@ -170,7 +170,7 @@ static int i801_transaction(int xact)
/* If the SMBus is still busy, we give up */
if (timeout >= MAX_TIMEOUT) {
dev_dbg(&I801_dev->dev, "SMBus Timeout!\n");
result = -1;
result = -ETIMEDOUT;
/* try to stop the current command */
dev_dbg(&I801_dev->dev, "Terminating the current operation\n");
outb_p(inb_p(SMBHSTCNT) | SMBHSTCNT_KILL, SMBHSTCNT);
@ -179,19 +179,19 @@ static int i801_transaction(int xact)
}
if (temp & SMBHSTSTS_FAILED) {
result = -1;
result = -EIO;
dev_dbg(&I801_dev->dev, "Error: Failed bus transaction\n");
}
if (temp & SMBHSTSTS_BUS_ERR) {
result = -1;
result = -EIO;
dev_err(&I801_dev->dev, "Bus collision! SMBus may be locked "
"until next hard reset. (sorry!)\n");
/* Clock stops and slave is stuck in mid-transmission */
}
if (temp & SMBHSTSTS_DEV_ERR) {
result = -1;
result = -ENXIO;
dev_dbg(&I801_dev->dev, "Error: no response!\n");
}
@ -231,6 +231,7 @@ static int i801_block_transaction_by_block(union i2c_smbus_data *data,
char read_write, int hwpec)
{
int i, len;
int status;
inb_p(SMBHSTCNT); /* reset the data buffer index */
@ -242,14 +243,15 @@ static int i801_block_transaction_by_block(union i2c_smbus_data *data,
outb_p(data->block[i+1], SMBBLKDAT);
}
if (i801_transaction(I801_BLOCK_DATA | ENABLE_INT9 |
I801_PEC_EN * hwpec))
return -1;
status = i801_transaction(I801_BLOCK_DATA | ENABLE_INT9 |
I801_PEC_EN * hwpec);
if (status)
return status;
if (read_write == I2C_SMBUS_READ) {
len = inb_p(SMBHSTDAT0);
if (len < 1 || len > I2C_SMBUS_BLOCK_MAX)
return -1;
return -EPROTO;
data->block[0] = len;
for (i = 0; i < len; i++)
@ -314,11 +316,11 @@ static int i801_block_transaction_byte_by_byte(union i2c_smbus_data *data,
if (((temp = inb_p(SMBHSTSTS)) & errmask) != 0x00) {
dev_err(&I801_dev->dev,
"Reset failed! (%02x)\n", temp);
return -1;
return -EBUSY;
}
if (i != 1)
/* if die in middle of block transaction, fail */
return -1;
return -EIO;
}
if (i == 1)
@ -342,19 +344,19 @@ static int i801_block_transaction_byte_by_byte(union i2c_smbus_data *data,
msleep(1);
outb_p(inb_p(SMBHSTCNT) & (~SMBHSTCNT_KILL),
SMBHSTCNT);
result = -1;
result = -ETIMEDOUT;
dev_dbg(&I801_dev->dev, "SMBus Timeout!\n");
}
if (temp & SMBHSTSTS_FAILED) {
result = -1;
result = -EIO;
dev_dbg(&I801_dev->dev,
"Error: Failed bus transaction\n");
} else if (temp & SMBHSTSTS_BUS_ERR) {
result = -1;
result = -EIO;
dev_err(&I801_dev->dev, "Bus collision!\n");
} else if (temp & SMBHSTSTS_DEV_ERR) {
result = -1;
result = -ENXIO;
dev_dbg(&I801_dev->dev, "Error: no response!\n");
}
@ -362,7 +364,7 @@ static int i801_block_transaction_byte_by_byte(union i2c_smbus_data *data,
&& command != I2C_SMBUS_I2C_BLOCK_DATA) {
len = inb_p(SMBHSTDAT0);
if (len < 1 || len > I2C_SMBUS_BLOCK_MAX)
return -1;
return -EPROTO;
data->block[0] = len;
}
@ -394,7 +396,7 @@ static int i801_set_block_buffer_mode(void)
{
outb_p(inb_p(SMBAUXCTL) | SMBAUXCTL_E32B, SMBAUXCTL);
if ((inb_p(SMBAUXCTL) & SMBAUXCTL_E32B) == 0)
return -1;
return -EIO;
return 0;
}
@ -414,7 +416,7 @@ static int i801_block_transaction(union i2c_smbus_data *data, char read_write,
} else if (!(i801_features & FEATURE_I2C_BLOCK_READ)) {
dev_err(&I801_dev->dev,
"I2C block read is unsupported!\n");
return -1;
return -EOPNOTSUPP;
}
}
@ -449,7 +451,7 @@ static int i801_block_transaction(union i2c_smbus_data *data, char read_write,
return result;
}
/* Return -1 on error. */
/* Return negative errno on error. */
static s32 i801_access(struct i2c_adapter * adap, u16 addr,
unsigned short flags, char read_write, u8 command,
int size, union i2c_smbus_data * data)
@ -514,7 +516,7 @@ static s32 i801_access(struct i2c_adapter * adap, u16 addr,
case I2C_SMBUS_PROC_CALL:
default:
dev_err(&I801_dev->dev, "Unsupported transaction %d\n", size);
return -1;
return -EOPNOTSUPP;
}
if (hwpec) /* enable/disable hardware PEC */
@ -537,7 +539,7 @@ static s32 i801_access(struct i2c_adapter * adap, u16 addr,
if(block)
return ret;
if(ret)
return -1;
return ret;
if ((read_write == I2C_SMBUS_WRITE) || (xact == I801_QUICK))
return 0;

25
drivers/i2c/busses/i2c-nforce2.c
View file

@ -172,16 +172,16 @@ static int nforce2_check_status(struct i2c_adapter *adap)
dev_dbg(&adap->dev, "SMBus Timeout!\n");
if (smbus->can_abort)
nforce2_abort(adap);
return -1;
return -ETIMEDOUT;
}
if (!(temp & NVIDIA_SMB_STS_DONE) || (temp & NVIDIA_SMB_STS_STATUS)) {
dev_dbg(&adap->dev, "Transaction failed (0x%02x)!\n", temp);
return -1;
return -EIO;
}
return 0;
}
/* Return -1 on error */
/* Return negative errno on error */
static s32 nforce2_access(struct i2c_adapter * adap, u16 addr,
unsigned short flags, char read_write,
u8 command, int size, union i2c_smbus_data * data)
@ -189,7 +189,7 @@ static s32 nforce2_access(struct i2c_adapter * adap, u16 addr,
struct nforce2_smbus *smbus = adap->algo_data;
unsigned char protocol, pec;
u8 len;
int i;
int i, status;
protocol = (read_write == I2C_SMBUS_READ) ? NVIDIA_SMB_PRTCL_READ :
NVIDIA_SMB_PRTCL_WRITE;
@ -233,7 +233,7 @@ static s32 nforce2_access(struct i2c_adapter * adap, u16 addr,
"Transaction failed "
"(requested block size: %d)\n",
len);
return -1;
return -EINVAL;
}
outb_p(len, NVIDIA_SMB_BCNT);
for (i = 0; i < I2C_SMBUS_BLOCK_MAX; i++)
@ -245,14 +245,15 @@ static s32 nforce2_access(struct i2c_adapter * adap, u16 addr,
default:
dev_err(&adap->dev, "Unsupported transaction %d\n", size);
return -1;
return -EOPNOTSUPP;
}
outb_p((addr & 0x7f) << 1, NVIDIA_SMB_ADDR);
outb_p(protocol, NVIDIA_SMB_PRTCL);
if (nforce2_check_status(adap))
return -1;
status = nforce2_check_status(adap);
if (status)
return status;
if (read_write == I2C_SMBUS_WRITE)
return 0;
@ -274,7 +275,7 @@ static s32 nforce2_access(struct i2c_adapter * adap, u16 addr,
dev_err(&adap->dev, "Transaction failed "
"(received block size: 0x%02x)\n",
len);
return -1;
return -EPROTO;
}
for (i = 0; i < len; i++)
data->block[i+1] = inb_p(NVIDIA_SMB_DATA + i);
@ -335,7 +336,7 @@ static int __devinit nforce2_probe_smb (struct pci_dev *dev, int bar,
!= PCIBIOS_SUCCESSFUL) {
dev_err(&dev->dev, "Error reading PCI config for %s\n",
name);
return -1;
return -EIO;
}
smbus->base = iobase & PCI_BASE_ADDRESS_IO_MASK;
@ -345,7 +346,7 @@ static int __devinit nforce2_probe_smb (struct pci_dev *dev, int bar,
if (!request_region(smbus->base, smbus->size, nforce2_driver.name)) {
dev_err(&smbus->adapter.dev, "Error requesting region %02x .. %02X for %s\n",
smbus->base, smbus->base+smbus->size-1, name);
return -1;
return -EBUSY;
}
smbus->adapter.owner = THIS_MODULE;
smbus->adapter.id = I2C_HW_SMBUS_NFORCE2;
@ -360,7 +361,7 @@ static int __devinit nforce2_probe_smb (struct pci_dev *dev, int bar,
if (error) {
dev_err(&smbus->adapter.dev, "Failed to register adapter.\n");
release_region(smbus->base, smbus->size);
return -1;
return error;
}
dev_info(&smbus->adapter.dev, "nForce2 SMBus adapter at %#x\n", smbus->base);
return 0;

20
drivers/i2c/busses/i2c-piix4.c
View file

@ -253,7 +253,7 @@ static int piix4_transaction(void)
outb_p(temp, SMBHSTSTS);
if ((temp = inb_p(SMBHSTSTS)) != 0x00) {
dev_err(&piix4_adapter.dev, "Failed! (%02x)\n", temp);
return -1;
return -EBUSY;
} else {
dev_dbg(&piix4_adapter.dev, "Successful!\n");
}
@ -275,23 +275,23 @@ static int piix4_transaction(void)
/* If the SMBus is still busy, we give up */
if (timeout >= MAX_TIMEOUT) {
dev_err(&piix4_adapter.dev, "SMBus Timeout!\n");
result = -1;
result = -ETIMEDOUT;
}
if (temp & 0x10) {
result = -1;
result = -EIO;
dev_err(&piix4_adapter.dev, "Error: Failed bus transaction\n");
}
if (temp & 0x08) {
result = -1;
result = -EIO;
dev_dbg(&piix4_adapter.dev, "Bus collision! SMBus may be "
"locked until next hard reset. (sorry!)\n");
/* Clock stops and slave is stuck in mid-transmission */
}
if (temp & 0x04) {
result = -1;
result = -ENXIO;
dev_dbg(&piix4_adapter.dev, "Error: no response!\n");
}
@ -309,17 +309,18 @@ static int piix4_transaction(void)
return result;
}
/* Return -1 on error. */
/* Return negative errno on error. */
static s32 piix4_access(struct i2c_adapter * adap, u16 addr,
unsigned short flags, char read_write,
u8 command, int size, union i2c_smbus_data * data)
{
int i, len;
int status;
switch (size) {
case I2C_SMBUS_PROC_CALL:
dev_err(&adap->dev, "I2C_SMBUS_PROC_CALL not supported!\n");
return -1;
return -EOPNOTSUPP;
case I2C_SMBUS_QUICK:
outb_p(((addr & 0x7f) << 1) | (read_write & 0x01),
SMBHSTADD);
@ -371,8 +372,9 @@ static s32 piix4_access(struct i2c_adapter * adap, u16 addr,
outb_p((size & 0x1C) + (ENABLE_INT9 & 1), SMBHSTCNT);
if (piix4_transaction()) /* Error in transaction */
return -1;
status = piix4_transaction();
if (status)
return status;
if ((read_write == I2C_SMBUS_WRITE) || (size == PIIX4_QUICK))
return 0;

19
drivers/i2c/busses/i2c-sis5595.c
View file

@ -236,7 +236,7 @@ static int sis5595_transaction(struct i2c_adapter *adap)
sis5595_write(SMB_STS_HI, temp >> 8);
if ((temp = sis5595_read(SMB_STS_LO) + (sis5595_read(SMB_STS_HI) << 8)) != 0x00) {
dev_dbg(&adap->dev, "Failed! (%02x)\n", temp);
return -1;
return -EBUSY;
} else {
dev_dbg(&adap->dev, "Successful!\n");
}
@ -254,19 +254,19 @@ static int sis5595_transaction(struct i2c_adapter *adap)
/* If the SMBus is still busy, we give up */
if (timeout >= MAX_TIMEOUT) {
dev_dbg(&adap->dev, "SMBus Timeout!\n");
result = -1;
result = -ETIMEDOUT;
}
if (temp & 0x10) {
dev_dbg(&adap->dev, "Error: Failed bus transaction\n");
result = -1;
result = -ENXIO;
}
if (temp & 0x20) {
dev_err(&adap->dev, "Bus collision! SMBus may be locked until "
"next hard reset (or not...)\n");
/* Clock stops and slave is stuck in mid-transmission */
result = -1;
result = -EIO;
}
temp = sis5595_read(SMB_STS_LO) + (sis5595_read(SMB_STS_HI) << 8);
@ -282,11 +282,13 @@ static int sis5595_transaction(struct i2c_adapter *adap)
return result;
}
/* Return -1 on error. */
/* Return negative errno on error. */
static s32 sis5595_access(struct i2c_adapter *adap, u16 addr,
unsigned short flags, char read_write,
u8 command, int size, union i2c_smbus_data *data)
{
int status;
switch (size) {
case I2C_SMBUS_QUICK:
sis5595_write(SMB_ADDR, ((addr & 0x7f) << 1) | (read_write & 0x01));
@ -318,13 +320,14 @@ static s32 sis5595_access(struct i2c_adapter *adap, u16 addr,
break;
default:
dev_warn(&adap->dev, "Unsupported transaction %d\n", size);
return -1;
return -EOPNOTSUPP;
}
sis5595_write(SMB_CTL_LO, ((size & 0x0E)));
if (sis5595_transaction(adap))
return -1;
status = sis5595_transaction(adap);
if (status)
return status;
if ((size != SIS5595_PROC_CALL) &&
((read_write == I2C_SMBUS_WRITE) || (size == SIS5595_QUICK)))

47
drivers/i2c/busses/i2c-sis630.c
View file

@ -134,7 +134,7 @@ static int sis630_transaction_start(struct i2c_adapter *adap, int size, u8 *oldc
if ((temp = sis630_read(SMB_CNT) & 0x03) != 0x00) {
dev_dbg(&adap->dev, "Failed! (%02x)\n", temp);
return -1;
return -EBUSY;
} else {
dev_dbg(&adap->dev, "Successful!\n");
}
@ -177,17 +177,17 @@ static int sis630_transaction_wait(struct i2c_adapter *adap, int size)
/* If the SMBus is still busy, we give up */
if (timeout >= MAX_TIMEOUT) {
dev_dbg(&adap->dev, "SMBus Timeout!\n");
result = -1;
result = -ETIMEDOUT;
}
if (temp & 0x02) {
dev_dbg(&adap->dev, "Error: Failed bus transaction\n");
result = -1;
result = -ENXIO;
}
if (temp & 0x04) {
dev_err(&adap->dev, "Bus collision!\n");
result = -1;
result = -EIO;
/*
TBD: Datasheet say:
the software should clear this bit and restart SMBUS operation.
@ -250,8 +250,10 @@ static int sis630_block_data(struct i2c_adapter *adap, union i2c_smbus_data *dat
if (i==8 || (len<8 && i==len)) {
dev_dbg(&adap->dev, "start trans len=%d i=%d\n",len ,i);
/* first transaction */
if (sis630_transaction_start(adap, SIS630_BLOCK_DATA, &oldclock))
return -1;
rc = sis630_transaction_start(adap,
SIS630_BLOCK_DATA, &oldclock);
if (rc)
return rc;
}
else if ((i-1)%8 == 7 || i==len) {
dev_dbg(&adap->dev, "trans_wait len=%d i=%d\n",len,i);
@ -264,9 +266,10 @@ static int sis630_block_data(struct i2c_adapter *adap, union i2c_smbus_data *dat
*/
sis630_write(SMB_STS,0x10);
}
if (sis630_transaction_wait(adap, SIS630_BLOCK_DATA)) {
rc = sis630_transaction_wait(adap,
SIS630_BLOCK_DATA);
if (rc) {
dev_dbg(&adap->dev, "trans_wait failed\n");
rc = -1;
break;
}
}
@ -275,13 +278,14 @@ static int sis630_block_data(struct i2c_adapter *adap, union i2c_smbus_data *dat
else {
/* read request */
data->block[0] = len = 0;
if (sis630_transaction_start(adap, SIS630_BLOCK_DATA, &oldclock)) {
return -1;
}
rc = sis630_transaction_start(adap,
SIS630_BLOCK_DATA, &oldclock);
if (rc)
return rc;
do {
if (sis630_transaction_wait(adap, SIS630_BLOCK_DATA)) {
rc = sis630_transaction_wait(adap, SIS630_BLOCK_DATA);
if (rc) {
dev_dbg(&adap->dev, "trans_wait failed\n");
rc = -1;
break;
}
/* if this first transaction then read byte count */
@ -311,11 +315,13 @@ static int sis630_block_data(struct i2c_adapter *adap, union i2c_smbus_data *dat
return rc;
}
/* Return -1 on error. */
/* Return negative errno on error. */
static s32 sis630_access(struct i2c_adapter *adap, u16 addr,
unsigned short flags, char read_write,
u8 command, int size, union i2c_smbus_data *data)
{
int status;
switch (size) {
case I2C_SMBUS_QUICK:
sis630_write(SMB_ADDR, ((addr & 0x7f) << 1) | (read_write & 0x01));
@ -350,13 +356,13 @@ static s32 sis630_access(struct i2c_adapter *adap, u16 addr,
size = SIS630_BLOCK_DATA;
return sis630_block_data(adap, data, read_write);
default:
printk("Unsupported I2C size\n");
return -1;
break;
printk("Unsupported SMBus operation\n");
return -EOPNOTSUPP;
}
if (sis630_transaction(adap, size))
return -1;
status = sis630_transaction(adap, size);
if (status)
return status;
if ((size != SIS630_PCALL) &&
((read_write == I2C_SMBUS_WRITE) || (size == SIS630_QUICK))) {
@ -373,8 +379,7 @@ static s32 sis630_access(struct i2c_adapter *adap, u16 addr,
data->word = sis630_read(SMB_BYTE) + (sis630_read(SMB_BYTE + 1) << 8);
break;
default:
return -1;
break;
return -EOPNOTSUPP;
}
return 0;

23
drivers/i2c/busses/i2c-sis96x.c
View file

@ -111,7 +111,7 @@ static int sis96x_transaction(int size)
/* check it again */
if (((temp = sis96x_read(SMB_CNT)) & 0x03) != 0x00) {
dev_dbg(&sis96x_adapter.dev, "Failed (0x%02x)\n", temp);
return -1;
return -EBUSY;
} else {
dev_dbg(&sis96x_adapter.dev, "Successful\n");
}
@ -136,19 +136,19 @@ static int sis96x_transaction(int size)
/* If the SMBus is still busy, we give up */
if (timeout >= MAX_TIMEOUT) {
dev_dbg(&sis96x_adapter.dev, "SMBus Timeout! (0x%02x)\n", temp);
result = -1;
result = -ETIMEDOUT;
}
/* device error - probably missing ACK */
if (temp & 0x02) {
dev_dbg(&sis96x_adapter.dev, "Failed bus transaction!\n");
result = -1;
result = -ENXIO;
}
/* bus collision */
if (temp & 0x04) {
dev_dbg(&sis96x_adapter.dev, "Bus collision!\n");
result = -1;
result = -EIO;
}
/* Finish up by resetting the bus */
@ -161,11 +161,12 @@ static int sis96x_transaction(int size)
return result;
}
/* Return -1 on error. */
/* Return negative errno on error. */
static s32 sis96x_access(struct i2c_adapter * adap, u16 addr,
unsigned short flags, char read_write,
u8 command, int size, union i2c_smbus_data * data)
{
int status;
switch (size) {
case I2C_SMBUS_QUICK:
@ -203,17 +204,17 @@ static s32 sis96x_access(struct i2c_adapter * adap, u16 addr,
case I2C_SMBUS_BLOCK_DATA:
/* TO DO: */
dev_info(&adap->dev, "SMBus block not implemented!\n");
return -1;
return -EOPNOTSUPP;
break;
default:
dev_info(&adap->dev, "Unsupported I2C size\n");
return -1;
break;
dev_info(&adap->dev, "Unsupported SMBus operation\n");
return -EOPNOTSUPP;
}
if (sis96x_transaction(size))
return -1;
status = sis96x_transaction(size);
if (status)
return status;
if ((size != SIS96x_PROC_CALL) &&
((read_write == I2C_SMBUS_WRITE) || (size == SIS96x_QUICK)))

4
drivers/i2c/busses/i2c-stub.c
View file

@ -43,7 +43,7 @@ struct stub_chip {
static struct stub_chip *stub_chips;
/* Return -1 on error. */
/* Return negative errno on error. */
static s32 stub_xfer(struct i2c_adapter * adap, u16 addr, unsigned short flags,
char read_write, u8 command, int size, union i2c_smbus_data * data)
{
@ -120,7 +120,7 @@ static s32 stub_xfer(struct i2c_adapter * adap, u16 addr, unsigned short flags,
default:
dev_dbg(&adap->dev, "Unsupported I2C/SMBus command\n");
ret = -1;
ret = -EOPNOTSUPP;
break;
} /* switch (size) */

20
drivers/i2c/busses/i2c-viapro.c
View file

@ -152,7 +152,7 @@ static int vt596_transaction(u8 size)
if ((temp = inb_p(SMBHSTSTS)) & 0x1F) {
dev_err(&vt596_adapter.dev, "SMBus reset failed! "
"(0x%02x)\n", temp);
return -1;
return -EBUSY;
}
}
@ -167,24 +167,24 @@ static int vt596_transaction(u8 size)
/* If the SMBus is still busy, we give up */
if (timeout >= MAX_TIMEOUT) {
result = -1;
result = -ETIMEDOUT;
dev_err(&vt596_adapter.dev, "SMBus timeout!\n");
}
if (temp & 0x10) {
result = -1;
result = -EIO;
dev_err(&vt596_adapter.dev, "Transaction failed (0x%02x)\n",
size);
}
if (temp & 0x08) {
result = -1;
result = -EIO;
dev_err(&vt596_adapter.dev, "SMBus collision!\n");
}
if (temp & 0x04) {
int read = inb_p(SMBHSTADD) & 0x01;
result = -1;
result = -ENXIO;
/* The quick and receive byte commands are used to probe
for chips, so errors are expected, and we don't want
to frighten the user. */
@ -202,12 +202,13 @@ static int vt596_transaction(u8 size)
return result;
}
/* Return -1 on error, 0 on success */
/* Return negative errno on error, 0 on success */
static s32 vt596_access(struct i2c_adapter *adap, u16 addr,
unsigned short flags, char read_write, u8 command,
int size, union i2c_smbus_data *data)
{
int i;
int status;
switch (size) {
case I2C_SMBUS_QUICK:
@ -258,8 +259,9 @@ static s32 vt596_access(struct i2c_adapter *adap, u16 addr,
outb_p(((addr & 0x7f) << 1) | read_write, SMBHSTADD);
if (vt596_transaction(size)) /* Error in transaction */
return -1;
status = vt596_transaction(size);
if (status)
return status;
if ((read_write == I2C_SMBUS_WRITE) || (size == VT596_QUICK))
return 0;
@ -287,7 +289,7 @@ static s32 vt596_access(struct i2c_adapter *adap, u16 addr,
exit_unsupported:
dev_warn(&vt596_adapter.dev, "Unsupported command invoked! (0x%02x)\n",
size);
return -1;
return -EOPNOTSUPP;
}
static u32 vt596_func(struct i2c_adapter *adapter)