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path: root/drivers/char/isicom.c
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Diffstat (limited to 'drivers/char/isicom.c')
-rw-r--r--drivers/char/isicom.c171
1 files changed, 83 insertions, 88 deletions
diff --git a/drivers/char/isicom.c b/drivers/char/isicom.c
index eba2883..4f3cefa 100644
--- a/drivers/char/isicom.c
+++ b/drivers/char/isicom.c
@@ -126,8 +126,8 @@
#include <linux/delay.h>
#include <linux/ioport.h>
-#include <asm/uaccess.h>
-#include <asm/io.h>
+#include <linux/uaccess.h>
+#include <linux/io.h>
#include <asm/system.h>
#include <linux/pci.h>
@@ -189,7 +189,7 @@ struct isi_board {
unsigned short status;
unsigned short port_status; /* each bit for each port */
unsigned short shift_count;
- struct isi_port * ports;
+ struct isi_port *ports;
signed char count;
spinlock_t card_lock; /* Card wide lock 11/5/00 -sameer */
unsigned long flags;
@@ -205,11 +205,11 @@ struct isi_port {
u16 channel;
u16 status;
u16 closing_wait;
- struct isi_board * card;
- struct tty_struct * tty;
+ struct isi_board *card;
+ struct tty_struct *tty;
wait_queue_head_t close_wait;
wait_queue_head_t open_wait;
- unsigned char * xmit_buf;
+ unsigned char *xmit_buf;
int xmit_head;
int xmit_tail;
int xmit_cnt;
@@ -405,7 +405,7 @@ static void isicom_tx(unsigned long _data)
/* find next active board */
card = (prev_card + 1) & 0x0003;
- while(count-- > 0) {
+ while (count-- > 0) {
if (isi_card[card].status & BOARD_ACTIVE)
break;
card = (card + 1) & 0x0003;
@@ -428,7 +428,7 @@ static void isicom_tx(unsigned long _data)
if (retries >= 100)
goto unlock;
- for (;count > 0;count--, port++) {
+ for (; count > 0; count--, port++) {
/* port not active or tx disabled to force flow control */
if (!(port->flags & ASYNC_INITIALIZED) ||
!(port->status & ISI_TXOK))
@@ -471,9 +471,10 @@ static void isicom_tx(unsigned long _data)
break;
}
}
- if (cnt <= 0) break;
+ if (cnt <= 0)
+ break;
word_count = cnt >> 1;
- outsw(base, port->xmit_buf+port->xmit_tail,word_count);
+ outsw(base, port->xmit_buf+port->xmit_tail, word_count);
port->xmit_tail = (port->xmit_tail
+ (word_count << 1)) & (SERIAL_XMIT_SIZE - 1);
txcount -= (word_count << 1);
@@ -556,7 +557,7 @@ static irqreturn_t isicom_interrupt(int irq, void *dev_id)
tty = port->tty;
if (tty == NULL) {
word_count = byte_count >> 1;
- while(byte_count > 1) {
+ while (byte_count > 1) {
inw(base);
byte_count -= 2;
}
@@ -569,7 +570,7 @@ static irqreturn_t isicom_interrupt(int irq, void *dev_id)
if (header & 0x8000) { /* Status Packet */
header = inw(base);
- switch(header & 0xff) {
+ switch (header & 0xff) {
case 0: /* Change in EIA signals */
if (port->flags & ASYNC_CHECK_CD) {
if (port->status & ISI_DCD) {
@@ -656,7 +657,8 @@ static irqreturn_t isicom_interrupt(int irq, void *dev_id)
if (byte_count > 0) {
pr_dbg("Intr(0x%lx:%d): Flip buffer overflow! dropping "
"bytes...\n", base, channel + 1);
- while(byte_count > 0) { /* drain out unread xtra data */
+ /* drain out unread xtra data */
+ while (byte_count > 0) {
inw(base);
byte_count -= 2;
}
@@ -679,8 +681,11 @@ static void isicom_config_port(struct isi_port *port)
shift_count = card->shift_count;
unsigned char flow_ctrl;
- if (!(tty = port->tty) || !tty->termios)
+ tty = port->tty;
+
+ if (tty == NULL)
return;
+ /* FIXME: Switch to new tty baud API */
baud = C_BAUD(tty);
if (baud & CBAUDEX) {
baud &= ~CBAUDEX;
@@ -706,7 +711,7 @@ static void isicom_config_port(struct isi_port *port)
if ((port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
baud++; /* 57.6 Kbps */
if ((port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
- baud +=2; /* 115 Kbps */
+ baud += 2; /* 115 Kbps */
if ((port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
baud += 3; /* 230 kbps*/
if ((port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
@@ -716,15 +721,14 @@ static void isicom_config_port(struct isi_port *port)
/* hang up */
drop_dtr(port);
return;
- }
- else
+ } else
raise_dtr(port);
if (WaitTillCardIsFree(base) == 0) {
- outw(0x8000 | (channel << shift_count) |0x03, base);
+ outw(0x8000 | (channel << shift_count) | 0x03, base);
outw(linuxb_to_isib[baud] << 8 | 0x03, base);
channel_setup = 0;
- switch(C_CSIZE(tty)) {
+ switch (C_CSIZE(tty)) {
case CS5:
channel_setup |= ISICOM_CS5;
break;
@@ -767,7 +771,7 @@ static void isicom_config_port(struct isi_port *port)
flow_ctrl |= ISICOM_INITIATE_XONXOFF;
if (WaitTillCardIsFree(base) == 0) {
- outw(0x8000 | (channel << shift_count) |0x04, base);
+ outw(0x8000 | (channel << shift_count) | 0x04, base);
outw(flow_ctrl << 8 | 0x05, base);
outw((STOP_CHAR(tty)) << 8 | (START_CHAR(tty)), base);
InterruptTheCard(base);
@@ -805,20 +809,17 @@ static int isicom_setup_port(struct isi_port *port)
struct isi_board *card = port->card;
unsigned long flags;
- if (port->flags & ASYNC_INITIALIZED) {
+ if (port->flags & ASYNC_INITIALIZED)
return 0;
- }
if (!port->xmit_buf) {
- unsigned long page;
-
- if (!(page = get_zeroed_page(GFP_KERNEL)))
+ /* Relies on BKL */
+ unsigned long page = get_zeroed_page(GFP_KERNEL);
+ if (page == 0)
return -ENOMEM;
-
- if (port->xmit_buf) {
+ if (port->xmit_buf)
free_page(page);
- return -ERESTARTSYS;
- }
- port->xmit_buf = (unsigned char *) page;
+ else
+ port->xmit_buf = (unsigned char *) page;
}
spin_lock_irqsave(&card->card_lock, flags);
@@ -949,21 +950,18 @@ static int isicom_open(struct tty_struct *tty, struct file *filp)
port->count++;
tty->driver_data = port;
port->tty = tty;
- if ((error = isicom_setup_port(port))!=0)
- return error;
- if ((error = block_til_ready(tty, filp, port))!=0)
- return error;
-
- return 0;
+ error = isicom_setup_port(port);
+ if (error == 0)
+ error = block_til_ready(tty, filp, port);
+ return error;
}
/* close et all */
static inline void isicom_shutdown_board(struct isi_board *bp)
{
- if (bp->status & BOARD_ACTIVE) {
+ if (bp->status & BOARD_ACTIVE)
bp->status &= ~BOARD_ACTIVE;
- }
}
/* card->lock HAS to be held */
@@ -1012,6 +1010,22 @@ static void isicom_shutdown_port(struct isi_port *port)
}
}
+static void isicom_flush_buffer(struct tty_struct *tty)
+{
+ struct isi_port *port = tty->driver_data;
+ struct isi_board *card = port->card;
+ unsigned long flags;
+
+ if (isicom_paranoia_check(port, tty->name, "isicom_flush_buffer"))
+ return;
+
+ spin_lock_irqsave(&card->card_lock, flags);
+ port->xmit_cnt = port->xmit_head = port->xmit_tail = 0;
+ spin_unlock_irqrestore(&card->card_lock, flags);
+
+ tty_wakeup(tty);
+}
+
static void isicom_close(struct tty_struct *tty, struct file *filp)
{
struct isi_port *port = tty->driver_data;
@@ -1065,8 +1079,7 @@ static void isicom_close(struct tty_struct *tty, struct file *filp)
isicom_shutdown_port(port);
spin_unlock_irqrestore(&card->card_lock, flags);
- if (tty->driver->flush_buffer)
- tty->driver->flush_buffer(tty);
+ isicom_flush_buffer(tty);
tty_ldisc_flush(tty);
spin_lock_irqsave(&card->card_lock, flags);
@@ -1104,7 +1117,7 @@ static int isicom_write(struct tty_struct *tty, const unsigned char *buf,
spin_lock_irqsave(&card->card_lock, flags);
- while(1) {
+ while (1) {
cnt = min_t(int, count, min(SERIAL_XMIT_SIZE - port->xmit_cnt
- 1, SERIAL_XMIT_SIZE - port->xmit_head));
if (cnt <= 0)
@@ -1125,28 +1138,29 @@ static int isicom_write(struct tty_struct *tty, const unsigned char *buf,
}
/* put_char et all */
-static void isicom_put_char(struct tty_struct *tty, unsigned char ch)
+static int isicom_put_char(struct tty_struct *tty, unsigned char ch)
{
struct isi_port *port = tty->driver_data;
struct isi_board *card = port->card;
unsigned long flags;
if (isicom_paranoia_check(port, tty->name, "isicom_put_char"))
- return;
+ return 0;
if (!port->xmit_buf)
- return;
+ return 0;
spin_lock_irqsave(&card->card_lock, flags);
if (port->xmit_cnt >= SERIAL_XMIT_SIZE - 1) {
spin_unlock_irqrestore(&card->card_lock, flags);
- return;
+ return 0;
}
port->xmit_buf[port->xmit_head++] = ch;
port->xmit_head &= (SERIAL_XMIT_SIZE - 1);
port->xmit_cnt++;
spin_unlock_irqrestore(&card->card_lock, flags);
+ return 1;
}
/* flush_chars et all */
@@ -1258,6 +1272,8 @@ static int isicom_set_serial_info(struct isi_port *port,
if (copy_from_user(&newinfo, info, sizeof(newinfo)))
return -EFAULT;
+ lock_kernel();
+
reconfig_port = ((port->flags & ASYNC_SPD_MASK) !=
(newinfo.flags & ASYNC_SPD_MASK));
@@ -1265,12 +1281,13 @@ static int isicom_set_serial_info(struct isi_port *port,
if ((newinfo.close_delay != port->close_delay) ||
(newinfo.closing_wait != port->closing_wait) ||
((newinfo.flags & ~ASYNC_USR_MASK) !=
- (port->flags & ~ASYNC_USR_MASK)))
+ (port->flags & ~ASYNC_USR_MASK))) {
+ unlock_kernel();
return -EPERM;
- port->flags = ((port->flags & ~ ASYNC_USR_MASK) |
+ }
+ port->flags = ((port->flags & ~ASYNC_USR_MASK) |
(newinfo.flags & ASYNC_USR_MASK));
- }
- else {
+ } else {
port->close_delay = newinfo.close_delay;
port->closing_wait = newinfo.closing_wait;
port->flags = ((port->flags & ~ASYNC_FLAGS) |
@@ -1282,6 +1299,7 @@ static int isicom_set_serial_info(struct isi_port *port,
isicom_config_port(port);
spin_unlock_irqrestore(&port->card->card_lock, flags);
}
+ unlock_kernel();
return 0;
}
@@ -1290,6 +1308,7 @@ static int isicom_get_serial_info(struct isi_port *port,
{
struct serial_struct out_info;
+ lock_kernel();
memset(&out_info, 0, sizeof(out_info));
/* out_info.type = ? */
out_info.line = port - isi_ports;
@@ -1299,6 +1318,7 @@ static int isicom_get_serial_info(struct isi_port *port,
/* out_info.baud_base = ? */
out_info.close_delay = port->close_delay;
out_info.closing_wait = port->closing_wait;
+ unlock_kernel();
if (copy_to_user(info, &out_info, sizeof(out_info)))
return -EFAULT;
return 0;
@@ -1314,7 +1334,7 @@ static int isicom_ioctl(struct tty_struct *tty, struct file *filp,
if (isicom_paranoia_check(port, tty->name, "isicom_ioctl"))
return -ENODEV;
- switch(cmd) {
+ switch (cmd) {
case TCSBRK:
retval = tty_check_change(tty);
if (retval)
@@ -1331,19 +1351,6 @@ static int isicom_ioctl(struct tty_struct *tty, struct file *filp,
tty_wait_until_sent(tty, 0);
isicom_send_break(port, arg ? arg * (HZ/10) : HZ/4);
return 0;
-
- case TIOCGSOFTCAR:
- return put_user(C_CLOCAL(tty) ? 1 : 0,
- (unsigned long __user *)argp);
-
- case TIOCSSOFTCAR:
- if (get_user(arg, (unsigned long __user *) argp))
- return -EFAULT;
- tty->termios->c_cflag =
- ((tty->termios->c_cflag & ~CLOCAL) |
- (arg ? CLOCAL : 0));
- return 0;
-
case TIOCGSERIAL:
return isicom_get_serial_info(port, argp);
@@ -1453,22 +1460,6 @@ static void isicom_hangup(struct tty_struct *tty)
wake_up_interruptible(&port->open_wait);
}
-/* flush_buffer et all */
-static void isicom_flush_buffer(struct tty_struct *tty)
-{
- struct isi_port *port = tty->driver_data;
- struct isi_board *card = port->card;
- unsigned long flags;
-
- if (isicom_paranoia_check(port, tty->name, "isicom_flush_buffer"))
- return;
-
- spin_lock_irqsave(&card->card_lock, flags);
- port->xmit_cnt = port->xmit_head = port->xmit_tail = 0;
- spin_unlock_irqrestore(&card->card_lock, flags);
-
- tty_wakeup(tty);
-}
/*
* Driver init and deinit functions
@@ -1592,7 +1583,7 @@ static int __devinit load_firmware(struct pci_dev *pdev,
default:
dev_err(&pdev->dev, "Unknown signature.\n");
goto end;
- }
+ }
retval = request_firmware(&fw, name, &pdev->dev);
if (retval)
@@ -1620,7 +1611,8 @@ static int __devinit load_firmware(struct pci_dev *pdev,
if (WaitTillCardIsFree(base))
goto errrelfw;
- if ((status = inw(base + 0x4)) != 0) {
+ status = inw(base + 0x4);
+ if (status != 0) {
dev_warn(&pdev->dev, "Card%d rejected load header:\n"
KERN_WARNING "Address:0x%x\n"
KERN_WARNING "Count:0x%x\n"
@@ -1637,12 +1629,13 @@ static int __devinit load_firmware(struct pci_dev *pdev,
if (WaitTillCardIsFree(base))
goto errrelfw;
- if ((status = inw(base + 0x4)) != 0) {
+ status = inw(base + 0x4);
+ if (status != 0) {
dev_err(&pdev->dev, "Card%d got out of sync.Card "
"Status:0x%x\n", index + 1, status);
goto errrelfw;
}
- }
+ }
/* XXX: should we test it by reading it back and comparing with original like
* in load firmware package? */
@@ -1666,7 +1659,8 @@ static int __devinit load_firmware(struct pci_dev *pdev,
if (WaitTillCardIsFree(base))
goto errrelfw;
- if ((status = inw(base + 0x4)) != 0) {
+ status = inw(base + 0x4);
+ if (status != 0) {
dev_warn(&pdev->dev, "Card%d rejected verify header:\n"
KERN_WARNING "Address:0x%x\n"
KERN_WARNING "Count:0x%x\n"
@@ -1699,7 +1693,8 @@ static int __devinit load_firmware(struct pci_dev *pdev,
if (WaitTillCardIsFree(base))
goto errrelfw;
- if ((status = inw(base + 0x4)) != 0) {
+ status = inw(base + 0x4);
+ if (status != 0) {
dev_err(&pdev->dev, "Card%d verify got out of sync. "
"Card Status:0x%x\n", index + 1, status);
goto errrelfw;
@@ -1764,7 +1759,7 @@ static int __devinit isicom_probe(struct pci_dev *pdev,
index + 1);
retval = -EBUSY;
goto errdec;
- }
+ }
retval = request_irq(board->irq, isicom_interrupt,
IRQF_SHARED | IRQF_DISABLED, ISICOM_NAME, board);
@@ -1818,7 +1813,7 @@ static int __init isicom_init(void)
int retval, idx, channel;
struct isi_port *port;
- for(idx = 0; idx < BOARD_COUNT; idx++) {
+ for (idx = 0; idx < BOARD_COUNT; idx++) {
port = &isi_ports[idx * 16];
isi_card[idx].ports = port;
spin_lock_init(&isi_card[idx].card_lock);
@@ -1832,7 +1827,7 @@ static int __init isicom_init(void)
init_waitqueue_head(&port->open_wait);
init_waitqueue_head(&port->close_wait);
/* . . . */
- }
+ }
isi_card[idx].base = 0;
isi_card[idx].irq = 0;
}