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[PATCH] i2c: scx200_acb refactor/simplify code 

scx200_acb: refactor/simplify code (no functional changes)

Signed-off-by: Ben Gardner <bgardner@wabtec.com>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Ben Gardner 2006-01-18 22:44:04 +01:00 committed by Greg Kroah-Hartman
parent ef4d9275e2
commit 9b7b6d3b2b
1 changed files with 29 additions and 44 deletions
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73
drivers/i2c/busses/scx200_acb.c
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@ -124,8 +124,17 @@ static void scx200_acb_machine(struct scx200_acb_iface *iface, u8 status)
errmsg = "not master";
goto error;
}
if (status & ACBST_NEGACK)
goto negack;
if (status & ACBST_NEGACK) {
dev_dbg(&iface->adapter.dev, "negative ack in state %s\n",
scx200_acb_state_name[iface->state]);
iface->state = state_idle;
iface->result = -ENXIO;
outb(inb(ACBCTL1) | ACBCTL1_STOP, ACBCTL1);
outb(ACBST_STASTR | ACBST_NEGACK, ACBST);
return;
}
switch (iface->state) {
case state_idle:
@ -202,17 +211,6 @@ static void scx200_acb_machine(struct scx200_acb_iface *iface, u8 status)
return;
negack:
dev_dbg(&iface->adapter.dev, "negative ack in state %s\n",
scx200_acb_state_name[iface->state]);
iface->state = state_idle;
iface->result = -ENXIO;
outb(inb(ACBCTL1) | ACBCTL1_STOP, ACBCTL1);
outb(ACBST_STASTR | ACBST_NEGACK, ACBST);
return;
error:
dev_err(&iface->adapter.dev, "%s in state %s\n", errmsg,
scx200_acb_state_name[iface->state]);
@ -222,20 +220,10 @@ static void scx200_acb_machine(struct scx200_acb_iface *iface, u8 status)
iface->needs_reset = 1;
}
static void scx200_acb_timeout(struct scx200_acb_iface *iface)
{
dev_err(&iface->adapter.dev, "timeout in state %s\n",
scx200_acb_state_name[iface->state]);
iface->state = state_idle;
iface->result = -EIO;
iface->needs_reset = 1;
}
#ifdef POLLED_MODE
static void scx200_acb_poll(struct scx200_acb_iface *iface)
{
u8 status = 0;
u8 status;
unsigned long timeout;
timeout = jiffies + POLL_TIMEOUT;
@ -248,7 +236,12 @@ static void scx200_acb_poll(struct scx200_acb_iface *iface)
msleep(10);
}
scx200_acb_timeout(iface);
dev_err(&iface->adapter.dev, "timeout in state %s\n",
scx200_acb_state_name[iface->state]);
iface->state = state_idle;
iface->result = -EIO;
iface->needs_reset = 1;
}
#endif /* POLLED_MODE */
@ -291,13 +284,8 @@ static s32 scx200_acb_smbus_xfer(struct i2c_adapter *adapter,
break;
case I2C_SMBUS_BYTE:
if (rw == I2C_SMBUS_READ) {
len = 1;
buffer = &data->byte;
} else {
len = 1;
buffer = &command;
}
len = 1;
buffer = rw ? &data->byte : &command;
break;
case I2C_SMBUS_BYTE_DATA:
@ -331,9 +319,7 @@ static s32 scx200_acb_smbus_xfer(struct i2c_adapter *adapter,
down(&iface->sem);
iface->address_byte = address<<1;
if (rw == I2C_SMBUS_READ)
iface->address_byte |= 1;
iface->address_byte = (address << 1) | rw;
iface->command = command;
iface->ptr = buffer;
iface->len = len;
@ -433,7 +419,7 @@ static int __init scx200_acb_create(int base, int index)
{
struct scx200_acb_iface *iface;
struct i2c_adapter *adapter;
int rc = 0;
int rc;
char description[64];
iface = kzalloc(sizeof(*iface), GFP_KERNEL);
@ -459,14 +445,14 @@ static int __init scx200_acb_create(int base, int index)
printk(KERN_ERR NAME ": can't allocate io 0x%x-0x%x\n",
base, base + 8-1);
rc = -EBUSY;
goto errout;
goto errout_free;
}
iface->base = base;
rc = scx200_acb_probe(iface);
if (rc) {
printk(KERN_WARNING NAME ": probe failed\n");
goto errout;
goto errout_release;
}
scx200_acb_reset(iface);
@ -474,7 +460,7 @@ static int __init scx200_acb_create(int base, int index)
if (i2c_add_adapter(adapter) < 0) {
printk(KERN_ERR NAME ": failed to register\n");
rc = -ENODEV;
goto errout;
goto errout_release;
}
lock_kernel();
@ -484,12 +470,11 @@ static int __init scx200_acb_create(int base, int index)
return 0;
errout_release:
release_region(iface->base, 8);
errout_free:
kfree(iface);
errout:
if (iface) {
if (iface->base)
release_region(iface->base, 8);
kfree(iface);
}
return rc;
}