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Message-Id: <1202411485-16022-5-git-send-email-jirislaby@gmail.com>
Date: Thu, 7 Feb 2008 20:11:21 +0100
From: Jiri Slaby <jirislaby@...il.com>
To: "Oyvind Aabling" <Oyvind.Aabling@...-c.dk>
Cc: <linux-kernel@...r.kernel.org>, Jiri Slaby <jirislaby@...il.com>
Subject: [RFT 5/9] Char: moxa, little cleanup
Cleanup of
- whitespace
- macros
- useless casts
- return (sth); -> return sth;
- types
- superfluous parenthesis and braces
- init tmp directly in moxa_get_serial_info
- commented defunct code
- commented prototypes
Signed-off-by: Jiri Slaby <jirislaby@...il.com>
---
drivers/char/moxa.c | 158 ++++++++++++++++++---------------------------------
1 files changed, 55 insertions(+), 103 deletions(-)
diff --git a/drivers/char/moxa.c b/drivers/char/moxa.c
index 5a55b8c..d123827 100644
--- a/drivers/char/moxa.c
+++ b/drivers/char/moxa.c
@@ -54,7 +54,6 @@
#define MOXA_FW_HDRLEN 32
#define MOXAMAJOR 172
-#define MOXACUMAJOR 173
#define MAX_BOARDS 4 /* Don't change this value */
#define MAX_PORTS_PER_BOARD 32 /* Don't change this value */
@@ -246,7 +245,7 @@ static void moxa_wait_finish(void __iomem *ofsAddr)
printk(KERN_WARNING "moxa function expired\n");
}
-static void moxafunc(void __iomem *ofsAddr, int cmd, ushort arg)
+static void moxafunc(void __iomem *ofsAddr, u16 cmd, u16 arg)
{
writew(arg, ofsAddr + FuncArg);
writew(cmd, ofsAddr + FuncCode);
@@ -947,7 +946,7 @@ static int __devinit moxa_pci_probe(struct pci_dev *pdev,
pci_set_drvdata(pdev, board);
- return (0);
+ return 0;
err_base:
iounmap(board->basemem);
board->basemem = NULL;
@@ -998,10 +997,8 @@ static int __init moxa_init(void)
moxaDriver->flags = TTY_DRIVER_REAL_RAW;
tty_set_operations(moxaDriver, &moxa_ops);
- pr_debug("Moxa tty devices major number = %d\n", ttymajor);
-
if (tty_register_driver(moxaDriver)) {
- printk(KERN_ERR "Couldn't install MOXA Smartio family driver !\n");
+ printk(KERN_ERR "can't register MOXA Smartio tty driver!\n");
put_tty_driver(moxaDriver);
return -1;
}
@@ -1055,7 +1052,7 @@ static int __init moxa_init(void)
static void __exit moxa_exit(void)
{
- int i;
+ unsigned int i;
#ifdef CONFIG_PCI
pci_unregister_driver(&moxa_pci_driver);
@@ -1210,12 +1207,8 @@ static int moxa_write(struct tty_struct *tty,
len = MoxaPortWriteData(ch, buf, count);
spin_unlock_bh(&moxa_lock);
- /*********************************************
- if ( !(ch->statusflags & LOWWAIT) &&
- ((len != count) || (MoxaPortTxFree(port) <= 100)) )
- ************************************************/
ch->statusflags |= LOWWAIT;
- return (len);
+ return len;
}
static int moxa_write_room(struct tty_struct *tty)
@@ -1223,10 +1216,10 @@ static int moxa_write_room(struct tty_struct *tty)
struct moxa_port *ch;
if (tty->stopped)
- return (0);
+ return 0;
ch = tty->driver_data;
if (ch == NULL)
- return (0);
+ return 0;
return MoxaPortTxFree(ch);
}
@@ -1252,7 +1245,7 @@ static int moxa_chars_in_buffer(struct tty_struct *tty)
* routine. And since the open() failed, we return 0 here. TDJ
*/
if (ch == NULL)
- return (0);
+ return 0;
chars = MoxaPortTxQueue(ch);
if (chars) {
/*
@@ -1262,7 +1255,7 @@ static int moxa_chars_in_buffer(struct tty_struct *tty)
if (!(ch->statusflags & EMPTYWAIT))
moxa_setup_empty_event(tty);
}
- return (chars);
+ return chars;
}
static void moxa_flush_chars(struct tty_struct *tty)
@@ -1282,9 +1275,7 @@ static void moxa_put_char(struct tty_struct *tty, unsigned char c)
spin_lock_bh(&moxa_lock);
MoxaPortWriteData(ch, &c, 1);
spin_unlock_bh(&moxa_lock);
- /************************************************
- if ( !(ch->statusflags & LOWWAIT) && (MoxaPortTxFree(port) <= 100) )
- *************************************************/
+
ch->statusflags |= LOWWAIT;
}
@@ -1337,34 +1328,33 @@ static int moxa_tiocmset(struct tty_struct *tty, struct file *file,
static void moxa_throttle(struct tty_struct *tty)
{
- struct moxa_port *ch = (struct moxa_port *) tty->driver_data;
+ struct moxa_port *ch = tty->driver_data;
ch->statusflags |= THROTTLE;
}
static void moxa_unthrottle(struct tty_struct *tty)
{
- struct moxa_port *ch = (struct moxa_port *) tty->driver_data;
+ struct moxa_port *ch = tty->driver_data;
ch->statusflags &= ~THROTTLE;
}
static void moxa_set_termios(struct tty_struct *tty,
- struct ktermios *old_termios)
+ struct ktermios *old_termios)
{
- struct moxa_port *ch = (struct moxa_port *) tty->driver_data;
+ struct moxa_port *ch = tty->driver_data;
if (ch == NULL)
return;
moxa_set_tty_param(tty, old_termios);
- if (!(old_termios->c_cflag & CLOCAL) &&
- (tty->termios->c_cflag & CLOCAL))
+ if (!(old_termios->c_cflag & CLOCAL) && C_CLOCAL(tty))
wake_up_interruptible(&ch->open_wait);
}
static void moxa_stop(struct tty_struct *tty)
{
- struct moxa_port *ch = (struct moxa_port *) tty->driver_data;
+ struct moxa_port *ch = tty->driver_data;
if (ch == NULL)
return;
@@ -1375,7 +1365,7 @@ static void moxa_stop(struct tty_struct *tty)
static void moxa_start(struct tty_struct *tty)
{
- struct moxa_port *ch = (struct moxa_port *) tty->driver_data;
+ struct moxa_port *ch = tty->driver_data;
if (ch == NULL)
return;
@@ -1403,7 +1393,7 @@ static void moxa_new_dcdstate(struct moxa_port *p, u8 dcd)
{
dcd = !!dcd;
- if ((dcd != p->DCDState) && p->tty && C_CLOCAL(p->tty)) {
+ if (dcd != p->DCDState && p->tty && C_CLOCAL(p->tty)) {
if (!dcd)
tty_hangup(p->tty);
wake_up_interruptible(&p->open_wait);
@@ -1513,12 +1503,10 @@ static void moxa_poll(unsigned long ignored)
static void moxa_set_tty_param(struct tty_struct *tty, struct ktermios *old_termios)
{
- register struct ktermios *ts;
- struct moxa_port *ch;
+ register struct ktermios *ts = tty->termios;
+ struct moxa_port *ch = tty->driver_data;
int rts, cts, txflow, rxflow, xany, baud;
- ch = (struct moxa_port *) tty->driver_data;
- ts = tty->termios;
rts = cts = txflow = rxflow = xany = 0;
if (ts->c_cflag & CRTSCTS)
rts = cts = 1;
@@ -1575,7 +1563,7 @@ static void moxa_shut_down(struct moxa_port *ch)
static void MoxaPortFlushData(struct moxa_port *port, int mode)
{
void __iomem *ofsAddr;
- if ((mode < 0) || (mode > 2))
+ if (mode < 0 || mode > 2)
return;
ofsAddr = port->tableAddr;
moxafunc(ofsAddr, FC_FlushQueue, mode);
@@ -1585,27 +1573,6 @@ static void MoxaPortFlushData(struct moxa_port *port, int mode)
}
}
-/*****************************************************************************
- * Port level functions: *
- * 2. MoxaPortEnable(int port); *
- * 3. MoxaPortDisable(int port); *
- * 4. MoxaPortGetMaxBaud(int port); *
- * 6. MoxaPortSetBaud(int port, long baud); *
- * 8. MoxaPortSetTermio(int port, unsigned char *termio); *
- * 9. MoxaPortGetLineOut(int port, int *dtrState, int *rtsState); *
- * 10. MoxaPortLineCtrl(int port, int dtrState, int rtsState); *
- * 11. MoxaPortFlowCtrl(int port, int rts, int cts, int rx, int tx,int xany); *
- * 12. MoxaPortLineStatus(int port); *
- * 15. MoxaPortFlushData(int port, int mode); *
- * 16. MoxaPortWriteData(int port, unsigned char * buffer, int length); *
- * 17. MoxaPortReadData(int port, struct tty_struct *tty); *
- * 20. MoxaPortTxQueue(int port); *
- * 21. MoxaPortTxFree(int port); *
- * 22. MoxaPortRxQueue(int port); *
- * 24. MoxaPortTxDisable(int port); *
- * 25. MoxaPortTxEnable(int port); *
- * 27. MoxaPortResetBrkCnt(int port); *
- *****************************************************************************/
/*
* Moxa Port Number Description:
*
@@ -1810,16 +1777,16 @@ static void MoxaPortFlushData(struct moxa_port *port, int mode)
static void MoxaPortEnable(struct moxa_port *port)
{
void __iomem *ofsAddr;
- short lowwater = 512;
+ u16 lowwater = 512;
ofsAddr = port->tableAddr;
writew(lowwater, ofsAddr + Low_water);
if (port->board->boardType == MOXA_BOARD_C320_ISA ||
- port->board->boardType == MOXA_BOARD_C320_PCI) {
+ port->board->boardType == MOXA_BOARD_C320_PCI)
moxafunc(ofsAddr, FC_SetBreakIrq, 0);
- } else {
- writew(readw(ofsAddr + HostStat) | WakeupBreak, ofsAddr + HostStat);
- }
+ else
+ writew(readw(ofsAddr + HostStat) | WakeupBreak,
+ ofsAddr + HostStat);
moxafunc(ofsAddr, FC_SetLineIrq, Magic_code);
moxafunc(ofsAddr, FC_FlushQueue, 2);
@@ -1842,9 +1809,9 @@ static long MoxaPortGetMaxBaud(struct moxa_port *port)
{
if (port->board->boardType == MOXA_BOARD_C320_ISA ||
port->board->boardType == MOXA_BOARD_C320_PCI)
- return (460800L);
+ return 460800L;
else
- return (921600L);
+ return 921600L;
}
@@ -1854,8 +1821,8 @@ static long MoxaPortSetBaud(struct moxa_port *port, long baud)
long max, clock;
unsigned int val;
- if ((baud < 50L) || ((max = MoxaPortGetMaxBaud(port)) == 0))
- return (0);
+ if (baud < 50L || (max = MoxaPortGetMaxBaud(port)) == 0)
+ return 0;
ofsAddr = port->tableAddr;
if (baud > max)
baud = max;
@@ -1868,7 +1835,7 @@ static long MoxaPortSetBaud(struct moxa_port *port, long baud)
val = clock / baud;
moxafunc(ofsAddr, FC_SetBaud, val);
baud = clock / val;
- return (baud);
+ return baud;
}
static int MoxaPortSetTermio(struct moxa_port *port, struct ktermios *termio,
@@ -1907,12 +1874,12 @@ static int MoxaPortSetTermio(struct moxa_port *port, struct ktermios *termio,
} else
mode |= MX_PARNONE;
- moxafunc(ofsAddr, FC_SetDataMode, (ushort) mode);
+ moxafunc(ofsAddr, FC_SetDataMode, (u16)mode);
if (port->board->boardType == MOXA_BOARD_C320_ISA ||
port->board->boardType == MOXA_BOARD_C320_PCI) {
if (baud >= 921600L)
- return (-1);
+ return -1;
}
baud = MoxaPortSetBaud(port, baud);
@@ -1923,24 +1890,23 @@ static int MoxaPortSetTermio(struct moxa_port *port, struct ktermios *termio,
moxa_wait_finish(ofsAddr);
}
- return (baud);
+ return baud;
}
static int MoxaPortGetLineOut(struct moxa_port *port, int *dtrState,
int *rtsState)
{
-
if (dtrState)
*dtrState = !!(port->lineCtrl & DTR_ON);
if (rtsState)
*rtsState = !!(port->lineCtrl & RTS_ON);
- return (0);
+ return 0;
}
static void MoxaPortLineCtrl(struct moxa_port *port, int dtr, int rts)
{
- int mode = 0;
+ u8 mode = 0;
if (dtr)
mode |= DTR_ON;
@@ -2152,60 +2118,46 @@ static void MoxaPortTxEnable(struct moxa_port *port)
}
static int moxa_get_serial_info(struct moxa_port *info,
- struct serial_struct __user *retinfo)
+ struct serial_struct __user *retinfo)
{
- struct serial_struct tmp;
-
- memset(&tmp, 0, sizeof(tmp));
- tmp.type = info->type;
- tmp.line = info->tty->index;
- tmp.port = 0;
- tmp.irq = 0;
- tmp.flags = info->asyncflags;
- tmp.baud_base = 921600;
- tmp.close_delay = info->close_delay;
- tmp.custom_divisor = 0;
- tmp.hub6 = 0;
- if(copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
- return -EFAULT;
- return (0);
+ struct serial_struct tmp = {
+ .type = info->type,
+ .line = info->tty->index,
+ .flags = info->asyncflags,
+ .baud_base = 921600,
+ .close_delay = info->close_delay
+ };
+ return copy_to_user(retinfo, &tmp, sizeof(*retinfo)) ? -EFAULT : 0;
}
static int moxa_set_serial_info(struct moxa_port *info,
- struct serial_struct __user *new_info)
+ struct serial_struct __user *new_info)
{
struct serial_struct new_serial;
- if(copy_from_user(&new_serial, new_info, sizeof(new_serial)))
+ if (copy_from_user(&new_serial, new_info, sizeof(new_serial)))
return -EFAULT;
- if ((new_serial.irq != 0) ||
- (new_serial.port != 0) ||
-// (new_serial.type != info->type) ||
- (new_serial.custom_divisor != 0) ||
- (new_serial.baud_base != 921600))
- return (-EPERM);
+ if (new_serial.irq != 0 || new_serial.port != 0 ||
+ new_serial.custom_divisor != 0 ||
+ new_serial.baud_base != 921600)
+ return -EPERM;
if (!capable(CAP_SYS_ADMIN)) {
if (((new_serial.flags & ~ASYNC_USR_MASK) !=
(info->asyncflags & ~ASYNC_USR_MASK)))
- return (-EPERM);
- } else {
+ return -EPERM;
+ } else
info->close_delay = new_serial.close_delay * HZ / 100;
- }
new_serial.flags = (new_serial.flags & ~ASYNC_FLAGS);
new_serial.flags |= (info->asyncflags & ASYNC_FLAGS);
- if (new_serial.type == PORT_16550A) {
- MoxaSetFifo(info, 1);
- } else {
- MoxaSetFifo(info, 0);
- }
+ MoxaSetFifo(info, new_serial.type == PORT_16550A);
info->type = new_serial.type;
- return (0);
+ return 0;
}
--
1.5.3.8
--
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