aboutsummaryrefslogtreecommitdiff
path: root/drivers/char
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/char')
-rw-r--r--drivers/char/cyclades.c16
-rw-r--r--drivers/char/hvc_console.c2
-rw-r--r--drivers/char/ip2/ip2main.c26
-rw-r--r--drivers/char/isicom.c54
-rw-r--r--drivers/char/moxa.c20
-rw-r--r--drivers/char/mxser.c3
-rw-r--r--drivers/char/nozomi.c157
-rw-r--r--drivers/char/serial167.c3
-rw-r--r--drivers/char/specialix.c2
-rw-r--r--drivers/char/synclink.c4
-rw-r--r--drivers/char/synclink_gt.c186
-rw-r--r--drivers/char/tty_buffer.c6
-rw-r--r--drivers/char/tty_ldisc.c50
-rw-r--r--drivers/char/vt_ioctl.c39
14 files changed, 307 insertions, 261 deletions
diff --git a/drivers/char/cyclades.c b/drivers/char/cyclades.c
index 4254457d391..b861c08263a 100644
--- a/drivers/char/cyclades.c
+++ b/drivers/char/cyclades.c
@@ -158,13 +158,11 @@ static unsigned int cy_isa_addresses[] = {
#define NR_ISA_ADDRS ARRAY_SIZE(cy_isa_addresses)
-#ifdef MODULE
static long maddr[NR_CARDS];
static int irq[NR_CARDS];
module_param_array(maddr, long, NULL, 0);
module_param_array(irq, int, NULL, 0);
-#endif
#endif /* CONFIG_ISA */
@@ -598,12 +596,6 @@ static void cyy_chip_tx(struct cyclades_card *cinfo, unsigned int chip,
save_car = readb(base_addr + (CyCAR << index));
cy_writeb(base_addr + (CyCAR << index), save_xir);
- /* validate the port# (as configured and open) */
- if (channel + chip * 4 >= cinfo->nports) {
- cy_writeb(base_addr + (CySRER << index),
- readb(base_addr + (CySRER << index)) & ~CyTxRdy);
- goto end;
- }
info = &cinfo->ports[channel + chip * 4];
tty = tty_port_tty_get(&info->port);
if (tty == NULL) {
@@ -3316,13 +3308,10 @@ static int __init cy_detect_isa(void)
unsigned short cy_isa_irq, nboard;
void __iomem *cy_isa_address;
unsigned short i, j, cy_isa_nchan;
-#ifdef MODULE
int isparam = 0;
-#endif
nboard = 0;
-#ifdef MODULE
/* Check for module parameters */
for (i = 0; i < NR_CARDS; i++) {
if (maddr[i] || i) {
@@ -3332,7 +3321,6 @@ static int __init cy_detect_isa(void)
if (!maddr[i])
break;
}
-#endif
/* scan the address table probing for Cyclom-Y/ISA boards */
for (i = 0; i < NR_ISA_ADDRS; i++) {
@@ -3353,11 +3341,10 @@ static int __init cy_detect_isa(void)
iounmap(cy_isa_address);
continue;
}
-#ifdef MODULE
+
if (isparam && i < NR_CARDS && irq[i])
cy_isa_irq = irq[i];
else
-#endif
/* find out the board's irq by probing */
cy_isa_irq = detect_isa_irq(cy_isa_address);
if (cy_isa_irq == 0) {
@@ -4208,3 +4195,4 @@ module_exit(cy_cleanup_module);
MODULE_LICENSE("GPL");
MODULE_VERSION(CY_VERSION);
MODULE_ALIAS_CHARDEV_MAJOR(CYCLADES_MAJOR);
+MODULE_FIRMWARE("cyzfirm.bin");
diff --git a/drivers/char/hvc_console.c b/drivers/char/hvc_console.c
index 4c3b59be286..465185fc0f5 100644
--- a/drivers/char/hvc_console.c
+++ b/drivers/char/hvc_console.c
@@ -146,7 +146,7 @@ static void hvc_console_print(struct console *co, const char *b,
return;
/* This console adapter was removed so it is not usable. */
- if (vtermnos[index] < 0)
+ if (vtermnos[index] == -1)
return;
while (count > 0 || i > 0) {
diff --git a/drivers/char/ip2/ip2main.c b/drivers/char/ip2/ip2main.c
index 517271c762e..911e1da6def 100644
--- a/drivers/char/ip2/ip2main.c
+++ b/drivers/char/ip2/ip2main.c
@@ -208,6 +208,7 @@ static int DumpFifoBuffer( char __user *, int);
static void ip2_init_board(int, const struct firmware *);
static unsigned short find_eisa_board(int);
+static int ip2_setup(char *str);
/***************/
/* Static Data */
@@ -263,7 +264,7 @@ static int tracewrap;
/* Macros */
/**********/
-#if defined(MODULE) && defined(IP2DEBUG_OPEN)
+#ifdef IP2DEBUG_OPEN
#define DBG_CNT(s) printk(KERN_DEBUG "(%s): [%x] ttyc=%d, modc=%x -> %s\n", \
tty->name,(pCh->flags), \
tty->count,/*GET_USE_COUNT(module)*/0,s)
@@ -285,7 +286,10 @@ MODULE_AUTHOR("Doug McNash");
MODULE_DESCRIPTION("Computone IntelliPort Plus Driver");
MODULE_LICENSE("GPL");
+#define MAX_CMD_STR 50
+
static int poll_only;
+static char cmd[MAX_CMD_STR];
static int Eisa_irq;
static int Eisa_slot;
@@ -309,6 +313,8 @@ module_param_array(io, int, NULL, 0);
MODULE_PARM_DESC(io, "I/O ports for IntelliPort Cards");
module_param(poll_only, bool, 0);
MODULE_PARM_DESC(poll_only, "Do not use card interrupts");
+module_param_string(ip2, cmd, MAX_CMD_STR, 0);
+MODULE_PARM_DESC(ip2, "Contains module parameter passed with 'ip2='");
/* for sysfs class support */
static struct class *ip2_class;
@@ -487,7 +493,6 @@ static const struct firmware *ip2_request_firmware(void)
return fw;
}
-#ifndef MODULE
/******************************************************************************
* ip2_setup:
* str: kernel command line string
@@ -531,7 +536,6 @@ static int __init ip2_setup(char *str)
return 1;
}
__setup("ip2=", ip2_setup);
-#endif /* !MODULE */
static int __init ip2_loadmain(void)
{
@@ -539,14 +543,20 @@ static int __init ip2_loadmain(void)
int err = 0;
i2eBordStrPtr pB = NULL;
int rc = -1;
- struct pci_dev *pdev = NULL;
const struct firmware *fw = NULL;
+ char *str;
+
+ str = cmd;
if (poll_only) {
/* Hard lock the interrupts to zero */
irq[0] = irq[1] = irq[2] = irq[3] = poll_only = 0;
}
+ /* Check module parameter with 'ip2=' has been passed or not */
+ if (!poll_only && (!strncmp(str, "ip2=", 4)))
+ ip2_setup(str);
+
ip2trace(ITRC_NO_PORT, ITRC_INIT, ITRC_ENTER, 0);
/* process command line arguments to modprobe or
@@ -612,6 +622,7 @@ static int __init ip2_loadmain(void)
case PCI:
#ifdef CONFIG_PCI
{
+ struct pci_dev *pdev = NULL;
u32 addr;
int status;
@@ -626,7 +637,7 @@ static int __init ip2_loadmain(void)
if (pci_enable_device(pdev)) {
dev_err(&pdev->dev, "can't enable device\n");
- break;
+ goto out;
}
ip2config.type[i] = PCI;
ip2config.pci_dev[i] = pci_dev_get(pdev);
@@ -638,6 +649,8 @@ static int __init ip2_loadmain(void)
dev_err(&pdev->dev, "I/O address error\n");
ip2config.irq[i] = pdev->irq;
+out:
+ pci_dev_put(pdev);
}
#else
printk(KERN_ERR "IP2: PCI card specified but PCI "
@@ -656,7 +669,6 @@ static int __init ip2_loadmain(void)
break;
} /* switch */
} /* for */
- pci_dev_put(pdev);
for (i = 0; i < IP2_MAX_BOARDS; ++i) {
if (ip2config.addr[i]) {
@@ -3197,3 +3209,5 @@ static struct pci_device_id ip2main_pci_tbl[] __devinitdata = {
};
MODULE_DEVICE_TABLE(pci, ip2main_pci_tbl);
+
+MODULE_FIRMWARE("intelliport2.bin");
diff --git a/drivers/char/isicom.c b/drivers/char/isicom.c
index 300d5bd6cd0..be2e8f9a27c 100644
--- a/drivers/char/isicom.c
+++ b/drivers/char/isicom.c
@@ -113,6 +113,8 @@
* 64-bit verification
*/
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
#include <linux/module.h>
#include <linux/firmware.h>
#include <linux/kernel.h>
@@ -140,7 +142,6 @@
#define InterruptTheCard(base) outw(0, (base) + 0xc)
#define ClearInterrupt(base) inw((base) + 0x0a)
-#define pr_dbg(str...) pr_debug("ISICOM: " str)
#ifdef DEBUG
#define isicom_paranoia_check(a, b, c) __isicom_paranoia_check((a), (b), (c))
#else
@@ -249,8 +250,7 @@ static int lock_card(struct isi_board *card)
spin_unlock_irqrestore(&card->card_lock, card->flags);
msleep(10);
}
- printk(KERN_WARNING "ISICOM: Failed to lock Card (0x%lx)\n",
- card->base);
+ pr_warning("Failed to lock Card (0x%lx)\n", card->base);
return 0; /* Failed to acquire the card! */
}
@@ -379,13 +379,13 @@ static inline int __isicom_paranoia_check(struct isi_port const *port,
char *name, const char *routine)
{
if (!port) {
- printk(KERN_WARNING "ISICOM: Warning: bad isicom magic for "
- "dev %s in %s.\n", name, routine);
+ pr_warning("Warning: bad isicom magic for dev %s in %s.\n",
+ name, routine);
return 1;
}
if (port->magic != ISICOM_MAGIC) {
- printk(KERN_WARNING "ISICOM: Warning: NULL isicom port for "
- "dev %s in %s.\n", name, routine);
+ pr_warning("Warning: NULL isicom port for dev %s in %s.\n",
+ name, routine);
return 1;
}
@@ -450,8 +450,8 @@ static void isicom_tx(unsigned long _data)
if (!(inw(base + 0x02) & (1 << port->channel)))
continue;
- pr_dbg("txing %d bytes, port%d.\n", txcount,
- port->channel + 1);
+ pr_debug("txing %d bytes, port%d.\n",
+ txcount, port->channel + 1);
outw((port->channel << isi_card[card].shift_count) | txcount,
base);
residue = NO;
@@ -547,8 +547,8 @@ static irqreturn_t isicom_interrupt(int irq, void *dev_id)
byte_count = header & 0xff;
if (channel + 1 > card->port_count) {
- printk(KERN_WARNING "ISICOM: isicom_interrupt(0x%lx): "
- "%d(channel) > port_count.\n", base, channel+1);
+ pr_warning("%s(0x%lx): %d(channel) > port_count.\n",
+ __func__, base, channel+1);
outw(0x0000, base+0x04); /* enable interrupts */
spin_unlock(&card->card_lock);
return IRQ_HANDLED;
@@ -582,14 +582,15 @@ static irqreturn_t isicom_interrupt(int irq, void *dev_id)
if (port->status & ISI_DCD) {
if (!(header & ISI_DCD)) {
/* Carrier has been lost */
- pr_dbg("interrupt: DCD->low.\n"
- );
+ pr_debug("%s: DCD->low.\n",
+ __func__);
port->status &= ~ISI_DCD;
tty_hangup(tty);
}
} else if (header & ISI_DCD) {
/* Carrier has been detected */
- pr_dbg("interrupt: DCD->high.\n");
+ pr_debug("%s: DCD->high.\n",
+ __func__);
port->status |= ISI_DCD;
wake_up_interruptible(&port->port.open_wait);
}
@@ -641,17 +642,19 @@ static irqreturn_t isicom_interrupt(int irq, void *dev_id)
break;
case 2: /* Statistics */
- pr_dbg("isicom_interrupt: stats!!!.\n");
+ pr_debug("%s: stats!!!\n", __func__);
break;
default:
- pr_dbg("Intr: Unknown code in status packet.\n");
+ pr_debug("%s: Unknown code in status packet.\n",
+ __func__);
break;
}
} else { /* Data Packet */
count = tty_prepare_flip_string(tty, &rp, byte_count & ~1);
- pr_dbg("Intr: Can rx %d of %d bytes.\n", count, byte_count);
+ pr_debug("%s: Can rx %d of %d bytes.\n",
+ __func__, count, byte_count);
word_count = count >> 1;
insw(base, rp, word_count);
byte_count -= (word_count << 1);
@@ -661,8 +664,8 @@ static irqreturn_t isicom_interrupt(int irq, void *dev_id)
byte_count -= 2;
}
if (byte_count > 0) {
- pr_dbg("Intr(0x%lx:%d): Flip buffer overflow! dropping "
- "bytes...\n", base, channel + 1);
+ pr_debug("%s(0x%lx:%d): Flip buffer overflow! dropping bytes...\n",
+ __func__, base, channel + 1);
/* drain out unread xtra data */
while (byte_count > 0) {
inw(base);
@@ -888,8 +891,8 @@ static void isicom_shutdown_port(struct isi_port *port)
struct isi_board *card = port->card;
if (--card->count < 0) {
- pr_dbg("isicom_shutdown_port: bad board(0x%lx) count %d.\n",
- card->base, card->count);
+ pr_debug("%s: bad board(0x%lx) count %d.\n",
+ __func__, card->base, card->count);
card->count = 0;
}
/* last port was closed, shutdown that board too */
@@ -1681,13 +1684,13 @@ static int __init isicom_init(void)
retval = tty_register_driver(isicom_normal);
if (retval) {
- pr_dbg("Couldn't register the dialin driver\n");
+ pr_debug("Couldn't register the dialin driver\n");
goto err_puttty;
}
retval = pci_register_driver(&isicom_driver);
if (retval < 0) {
- printk(KERN_ERR "ISICOM: Unable to register pci driver.\n");
+ pr_err("Unable to register pci driver.\n");
goto err_unrtty;
}
@@ -1717,3 +1720,8 @@ module_exit(isicom_exit);
MODULE_AUTHOR("MultiTech");
MODULE_DESCRIPTION("Driver for the ISI series of cards by MultiTech");
MODULE_LICENSE("GPL");
+MODULE_FIRMWARE("isi608.bin");
+MODULE_FIRMWARE("isi608em.bin");
+MODULE_FIRMWARE("isi616em.bin");
+MODULE_FIRMWARE("isi4608.bin");
+MODULE_FIRMWARE("isi4616.bin");
diff --git a/drivers/char/moxa.c b/drivers/char/moxa.c
index 63ee3bbc1ce..166495d6a1d 100644
--- a/drivers/char/moxa.c
+++ b/drivers/char/moxa.c
@@ -164,24 +164,25 @@ static unsigned int moxaFuncTout = HZ / 2;
static unsigned int moxaLowWaterChk;
static DEFINE_MUTEX(moxa_openlock);
static DEFINE_SPINLOCK(moxa_lock);
-/* Variables for insmod */
-#ifdef MODULE
+
static unsigned long baseaddr[MAX_BOARDS];
static unsigned int type[MAX_BOARDS];
static unsigned int numports[MAX_BOARDS];
-#endif
MODULE_AUTHOR("William Chen");
MODULE_DESCRIPTION("MOXA Intellio Family Multiport Board Device Driver");
MODULE_LICENSE("GPL");
-#ifdef MODULE
+MODULE_FIRMWARE("c218tunx.cod");
+MODULE_FIRMWARE("cp204unx.cod");
+MODULE_FIRMWARE("c320tunx.cod");
+
module_param_array(type, uint, NULL, 0);
MODULE_PARM_DESC(type, "card type: C218=2, C320=4");
module_param_array(baseaddr, ulong, NULL, 0);
MODULE_PARM_DESC(baseaddr, "base address");
module_param_array(numports, uint, NULL, 0);
MODULE_PARM_DESC(numports, "numports (ignored for C218)");
-#endif
+
module_param(ttymajor, int, 0);
/*
@@ -1024,6 +1025,8 @@ static int __init moxa_init(void)
{
unsigned int isabrds = 0;
int retval = 0;
+ struct moxa_board_conf *brd = moxa_boards;
+ unsigned int i;
printk(KERN_INFO "MOXA Intellio family driver version %s\n",
MOXA_VERSION);
@@ -1051,10 +1054,7 @@ static int __init moxa_init(void)
}
/* Find the boards defined from module args. */
-#ifdef MODULE
- {
- struct moxa_board_conf *brd = moxa_boards;
- unsigned int i;
+
for (i = 0; i < MAX_BOARDS; i++) {
if (!baseaddr[i])
break;
@@ -1087,8 +1087,6 @@ static int __init moxa_init(void)
isabrds++;
}
}
- }
-#endif
#ifdef CONFIG_PCI
retval = pci_register_driver(&moxa_pci_driver);
diff --git a/drivers/char/mxser.c b/drivers/char/mxser.c
index 3d923065d9a..e0c5d2a6904 100644
--- a/drivers/char/mxser.c
+++ b/drivers/char/mxser.c
@@ -895,8 +895,7 @@ static int mxser_activate(struct tty_port *port, struct tty_struct *tty)
if (inb(info->ioaddr + UART_LSR) == 0xff) {
spin_unlock_irqrestore(&info->slock, flags);
if (capable(CAP_SYS_ADMIN)) {
- if (tty)
- set_bit(TTY_IO_ERROR, &tty->flags);
+ set_bit(TTY_IO_ERROR, &tty->flags);
return 0;
} else
return -ENODEV;
diff --git a/drivers/char/nozomi.c b/drivers/char/nozomi.c
index 2ad7d37afbd..a3f32a15fde 100644
--- a/drivers/char/nozomi.c
+++ b/drivers/char/nozomi.c
@@ -136,10 +136,6 @@ static int debug;
#define RECEIVE_BUF_MAX 4
-/* Define all types of vendors and devices to support */
-#define VENDOR1 0x1931 /* Vendor Option */
-#define DEVICE1 0x000c /* HSDPA card */
-
#define R_IIR 0x0000 /* Interrupt Identity Register */
#define R_FCR 0x0000 /* Flow Control Register */
#define R_IER 0x0004 /* Interrupt Enable Register */
@@ -371,6 +367,8 @@ struct port {
struct mutex tty_sem;
wait_queue_head_t tty_wait;
struct async_icount tty_icount;
+
+ struct nozomi *dc;
};
/* Private data one for each card in the system */
@@ -405,7 +403,7 @@ struct buffer {
/* Global variables */
static const struct pci_device_id nozomi_pci_tbl[] __devinitconst = {
- {PCI_DEVICE(VENDOR1, DEVICE1)},
+ {PCI_DEVICE(0x1931, 0x000c)}, /* Nozomi HSDPA */
{},
};
@@ -414,6 +412,8 @@ MODULE_DEVICE_TABLE(pci, nozomi_pci_tbl);
static struct nozomi *ndevs[NOZOMI_MAX_CARDS];
static struct tty_driver *ntty_driver;
+static const struct tty_port_operations noz_tty_port_ops;
+
/*
* find card by tty_index
*/
@@ -853,8 +853,6 @@ static int receive_data(enum port_type index, struct nozomi *dc)
goto put;
}
- tty_buffer_request_room(tty, size);
-
while (size > 0) {
read_mem32((u32 *) buf, addr + offset, RECEIVE_BUF_MAX);
@@ -1473,9 +1471,11 @@ static int __devinit nozomi_card_init(struct pci_dev *pdev,
for (i = 0; i < MAX_PORT; i++) {
struct device *tty_dev;
-
- mutex_init(&dc->port[i].tty_sem);
- tty_port_init(&dc->port[i].port);
+ struct port *port = &dc->port[i];
+ port->dc = dc;
+ mutex_init(&port->tty_sem);
+ tty_port_init(&port->port);
+ port->port.ops = &noz_tty_port_ops;
tty_dev = tty_register_device(ntty_driver, dc->index_start + i,
&pdev->dev);
@@ -1600,67 +1600,74 @@ static void set_dtr(const struct tty_struct *tty, int dtr)
* ----------------------------------------------------------------------------
*/
-/* Called when the userspace process opens the tty, /dev/noz*. */
-static int ntty_open(struct tty_struct *tty, struct file *file)
+static int ntty_install(struct tty_driver *driver, struct tty_struct *tty)
{
struct port *port = get_port_by_tty(tty);
struct nozomi *dc = get_dc_by_tty(tty);
- unsigned long flags;
-
+ int ret;
if (!port || !dc || dc->state != NOZOMI_STATE_READY)
return -ENODEV;
-
- if (mutex_lock_interruptible(&port->tty_sem))
- return -ERESTARTSYS;
-
- port->port.count++;
- dc->open_ttys++;
-
- /* Enable interrupt downlink for channel */
- if (port->port.count == 1) {
- tty->driver_data = port;
- tty_port_tty_set(&port->port, tty);
- DBG1("open: %d", port->token_dl);
- spin_lock_irqsave(&dc->spin_mutex, flags);
- dc->last_ier = dc->last_ier | port->token_dl;
- writew(dc->last_ier, dc->reg_ier);
- spin_unlock_irqrestore(&dc->spin_mutex, flags);
+ ret = tty_init_termios(tty);
+ if (ret == 0) {
+ tty_driver_kref_get(driver);
+ driver->ttys[tty->index] = tty;
}
- mutex_unlock(&port->tty_sem);
- return 0;
+ return ret;
}
-/* Called when the userspace process close the tty, /dev/noz*. Also
- called immediately if ntty_open fails in which case tty->driver_data
- will be NULL an we exit by the first return */
+static void ntty_cleanup(struct tty_struct *tty)
+{
+ tty->driver_data = NULL;
+}
-static void ntty_close(struct tty_struct *tty, struct file *file)
+static int ntty_activate(struct tty_port *tport, struct tty_struct *tty)
{
- struct nozomi *dc = get_dc_by_tty(tty);
- struct port *nport = tty->driver_data;
- struct tty_port *port = &nport->port;
+ struct port *port = container_of(tport, struct port, port);
+ struct nozomi *dc = port->dc;
unsigned long flags;
- if (!dc || !nport)
- return;
+ DBG1("open: %d", port->token_dl);
+ spin_lock_irqsave(&dc->spin_mutex, flags);
+ dc->last_ier = dc->last_ier | port->token_dl;
+ writew(dc->last_ier, dc->reg_ier);
+ dc->open_ttys++;
+ spin_unlock_irqrestore(&dc->spin_mutex, flags);
+ printk("noz: activated %d: %p\n", tty->index, tport);
+ return 0;
+}
- /* Users cannot interrupt a close */
- mutex_lock(&nport->tty_sem);
+static int ntty_open(struct tty_struct *tty, struct file *filp)
+{
+ struct port *port = get_port_by_tty(tty);
+ return tty_port_open(&port->port, tty, filp);
+}
- WARN_ON(!port->count);
+static void ntty_shutdown(struct tty_port *tport)
+{
+ struct port *port = container_of(tport, struct port, port);
+ struct nozomi *dc = port->dc;
+ unsigned long flags;
+ DBG1("close: %d", port->token_dl);
+ spin_lock_irqsave(&dc->spin_mutex, flags);
+ dc->last_ier &= ~(port->token_dl);
+ writew(dc->last_ier, dc->reg_ier);
dc->open_ttys--;
- port->count--;
+ spin_unlock_irqrestore(&dc->spin_mutex, flags);
+ printk("noz: shutdown %p\n", tport);
+}
- if (port->count == 0) {
- DBG1("close: %d", nport->token_dl);
- tty_port_tty_set(port, NULL);
- spin_lock_irqsave(&dc->spin_mutex, flags);
- dc->last_ier &= ~(nport->token_dl);
- writew(dc->last_ier, dc->reg_ier);
- spin_unlock_irqrestore(&dc->spin_mutex, flags);
- }
- mutex_unlock(&nport->tty_sem);
+static void ntty_close(struct tty_struct *tty, struct file *filp)
+{
+ struct port *port = tty->driver_data;
+ if (port)
+ tty_port_close(&port->port, tty, filp);
+}
+
+static void ntty_hangup(struct tty_struct *tty)
+{
+ struct port *port = tty->driver_data;
+ tty_port_hangup(&port->port);
}
/*
@@ -1680,15 +1687,7 @@ static int ntty_write(struct tty_struct *tty, const unsigned char *buffer,
if (!dc || !port)
return -ENODEV;
- if (unlikely(!mutex_trylock(&port->tty_sem))) {
- /*
- * must test lock as tty layer wraps calls
- * to this function with BKL
- */
- dev_err(&dc->pdev->dev, "Would have deadlocked - "
- "return EAGAIN\n");
- return -EAGAIN;
- }
+ mutex_lock(&port->tty_sem);
if (unlikely(!port->port.count)) {
DBG1(" ");
@@ -1728,25 +1727,23 @@ exit:
* This method is called by the upper tty layer.
* #according to sources N_TTY.c it expects a value >= 0 and
* does not check for negative values.
+ *
+ * If the port is unplugged report lots of room and let the bits
+ * dribble away so we don't block anything.
*/
static int ntty_write_room(struct tty_struct *tty)
{
struct port *port = tty->driver_data;
- int room = 0;
+ int room = 4096;
const struct nozomi *dc = get_dc_by_tty(tty);
- if (!dc || !port)
- return 0;
- if (!mutex_trylock(&port->tty_sem))
- return 0;
-
- if (!port->port.count)
- goto exit;
-
- room = port->fifo_ul.size - kfifo_len(&port->fifo_ul);
-
-exit:
- mutex_unlock(&port->tty_sem);
+ if (dc) {
+ mutex_lock(&port->tty_sem);
+ if (port->port.count)
+ room = port->fifo_ul.size -
+ kfifo_len(&port->fifo_ul);
+ mutex_unlock(&port->tty_sem);
+ }
return room;
}
@@ -1906,10 +1903,16 @@ exit_in_buffer:
return rval;
}
+static const struct tty_port_operations noz_tty_port_ops = {
+ .activate = ntty_activate,
+ .shutdown = ntty_shutdown,
+};
+
static const struct tty_operations tty_ops = {
.ioctl = ntty_ioctl,
.open = ntty_open,
.close = ntty_close,
+ .hangup = ntty_hangup,
.write = ntty_write,
.write_room = ntty_write_room,
.unthrottle = ntty_unthrottle,
@@ -1917,6 +1920,8 @@ static const struct tty_operations tty_ops = {
.chars_in_buffer = ntty_chars_in_buffer,
.tiocmget = ntty_tiocmget,
.tiocmset = ntty_tiocmset,
+ .install = ntty_install,
+ .cleanup = ntty_cleanup,
};
/* Module initialization */
diff --git a/drivers/char/serial167.c b/drivers/char/serial167.c
index 452370af95d..986aa606a6b 100644
--- a/drivers/char/serial167.c
+++ b/drivers/char/serial167.c
@@ -658,8 +658,7 @@ static irqreturn_t cd2401_rx_interrupt(int irq, void *dev_id)
info->mon.char_max = char_count;
info->mon.char_last = char_count;
#endif
- len = tty_buffer_request_room(tty, char_count);
- while (len--) {
+ while (char_count--) {
data = base_addr[CyRDR];
tty_insert_flip_char(tty, data, TTY_NORMAL);
#ifdef CYCLOM_16Y_HACK
diff --git a/drivers/char/specialix.c b/drivers/char/specialix.c
index 268e17f9ec3..07ac14d949c 100644
--- a/drivers/char/specialix.c
+++ b/drivers/char/specialix.c
@@ -646,8 +646,6 @@ static void sx_receive(struct specialix_board *bp)
dprintk(SX_DEBUG_RX, "port: %p: count: %d\n", port, count);
port->hits[count > 8 ? 9 : count]++;
- tty_buffer_request_room(tty, count);
-
while (count--)
tty_insert_flip_char(tty, sx_in(bp, CD186x_RDR), TTY_NORMAL);
tty_flip_buffer_push(tty);
diff --git a/drivers/char/synclink.c b/drivers/char/synclink.c
index 4846b73ef28..0658fc54822 100644
--- a/drivers/char/synclink.c
+++ b/drivers/char/synclink.c
@@ -2031,7 +2031,7 @@ static int mgsl_put_char(struct tty_struct *tty, unsigned char ch)
if (mgsl_paranoia_check(info, tty->name, "mgsl_put_char"))
return 0;
- if (!tty || !info->xmit_buf)
+ if (!info->xmit_buf)
return 0;
spin_lock_irqsave(&info->irq_spinlock, flags);
@@ -2121,7 +2121,7 @@ static int mgsl_write(struct tty_struct * tty,
if (mgsl_paranoia_check(info, tty->name, "mgsl_write"))
goto cleanup;
- if (!tty || !info->xmit_buf)
+ if (!info->xmit_buf)
goto cleanup;
if ( info->params.mode == MGSL_MODE_HDLC ||
diff --git a/drivers/char/synclink_gt.c b/drivers/char/synclink_gt.c
index 8678f0c8699..4561ce2fba6 100644
--- a/drivers/char/synclink_gt.c
+++ b/drivers/char/synclink_gt.c
@@ -468,7 +468,7 @@ static unsigned int free_tbuf_count(struct slgt_info *info);
static unsigned int tbuf_bytes(struct slgt_info *info);
static void reset_tbufs(struct slgt_info *info);
static void tdma_reset(struct slgt_info *info);
-static void tx_load(struct slgt_info *info, const char *buf, unsigned int count);
+static bool tx_load(struct slgt_info *info, const char *buf, unsigned int count);
static void get_signals(struct slgt_info *info);
static void set_signals(struct slgt_info *info);
@@ -813,59 +813,32 @@ static int write(struct tty_struct *tty,
int ret = 0;
struct slgt_info *info = tty->driver_data;
unsigned long flags;
- unsigned int bufs_needed;
if (sanity_check(info, tty->name, "write"))
- goto cleanup;
+ return -EIO;
+
DBGINFO(("%s write count=%d\n", info->device_name, count));
- if (!info->tx_buf)
- goto cleanup;
+ if (!info->tx_buf || (count > info->max_frame_size))
+ return -EIO;
- if (count > info->max_frame_size) {
- ret = -EIO;
- goto cleanup;
- }
+ if (!count || tty->stopped || tty->hw_stopped)
+ return 0;
- if (!count)
- goto cleanup;
+ spin_lock_irqsave(&info->lock, flags);
- if (!info->tx_active && info->tx_count) {
+ if (info->tx_count) {
/* send accumulated data from send_char() */
- tx_load(info, info->tx_buf, info->tx_count);
- goto start;
+ if (!tx_load(info, info->tx_buf, info->tx_count))
+ goto cleanup;
+ info->tx_count = 0;
}
- bufs_needed = (count/DMABUFSIZE);
- if (count % DMABUFSIZE)
- ++bufs_needed;
- if (bufs_needed > free_tbuf_count(info))
- goto cleanup;
- ret = info->tx_count = count;
- tx_load(info, buf, count);
- goto start;
-
-start:
- if (info->tx_count && !tty->stopped && !tty->hw_stopped) {
- spin_lock_irqsave(&info->lock,flags);
- if (!info->tx_active)
- tx_start(info);
- else if (!(rd_reg32(info, TDCSR) & BIT0)) {
- /* transmit still active but transmit DMA stopped */
- unsigned int i = info->tbuf_current;
- if (!i)
- i = info->tbuf_count;
- i--;
- /* if DMA buf unsent must try later after tx idle */
- if (desc_count(info->tbufs[i]))
- ret = 0;
- }
- if (ret > 0)
- update_tx_timer(info);
- spin_unlock_irqrestore(&info->lock,flags);
- }
+ if (tx_load(info, buf, count))
+ ret = count;
cleanup:
+ spin_unlock_irqrestore(&info->lock, flags);
DBGINFO(("%s write rc=%d\n", info->device_name, ret));
return ret;
}
@@ -882,7 +855,7 @@ static int put_char(struct tty_struct *tty, unsigned char ch)
if (!info->tx_buf)
return 0;
spin_lock_irqsave(&info->lock,flags);
- if (!info->tx_active && (info->tx_count < info->max_frame_size)) {
+ if (info->tx_count < info->max_frame_size) {
info->tx_buf[info->tx_count++] = ch;
ret = 1;
}
@@ -981,10 +954,8 @@ static void flush_chars(struct tty_struct *tty)
DBGINFO(("%s flush_chars start transmit\n", info->device_name));
spin_lock_irqsave(&info->lock,flags);
- if (!info->tx_active && info->tx_count) {
- tx_load(info, info->tx_buf,info->tx_count);
- tx_start(info);
- }
+ if (info->tx_count && tx_load(info, info->tx_buf, info->tx_count))
+ info->tx_count = 0;
spin_unlock_irqrestore(&info->lock,flags);
}
@@ -997,10 +968,9 @@ static void flush_buffer(struct tty_struct *tty)
return;
DBGINFO(("%s flush_buffer\n", info->device_name));
- spin_lock_irqsave(&info->lock,flags);
- if (!info->tx_active)
- info->tx_count = 0;
- spin_unlock_irqrestore(&info->lock,flags);
+ spin_lock_irqsave(&info->lock, flags);
+ info->tx_count = 0;
+ spin_unlock_irqrestore(&info->lock, flags);
tty_wakeup(tty);
}
@@ -1033,12 +1003,10 @@ static void tx_release(struct tty_struct *tty)
if (sanity_check(info, tty->name, "tx_release"))
return;
DBGINFO(("%s tx_release\n", info->device_name));
- spin_lock_irqsave(&info->lock,flags);
- if (!info->tx_active && info->tx_count) {
- tx_load(info, info->tx_buf, info->tx_count);
- tx_start(info);
- }
- spin_unlock_irqrestore(&info->lock,flags);
+ spin_lock_irqsave(&info->lock, flags);
+ if (info->tx_count && tx_load(info, info->tx_buf, info->tx_count))
+ info->tx_count = 0;
+ spin_unlock_irqrestore(&info->lock, flags);
}
/*
@@ -1506,27 +1474,25 @@ static netdev_tx_t hdlcdev_xmit(struct sk_buff *skb,
DBGINFO(("%s hdlc_xmit\n", dev->name));
+ if (!skb->len)
+ return NETDEV_TX_OK;
+
/* stop sending until this frame completes */
netif_stop_queue(dev);
- /* copy data to device buffers */
- info->tx_count = skb->len;
- tx_load(info, skb->data, skb->len);
-
/* update network statistics */
dev->stats.tx_packets++;
dev->stats.tx_bytes += skb->len;
- /* done with socket buffer, so free it */
- dev_kfree_skb(skb);
-
/* save start time for transmit timeout detection */
dev->trans_start = jiffies;
- spin_lock_irqsave(&info->lock,flags);
- tx_start(info);
- update_tx_timer(info);
- spin_unlock_irqrestore(&info->lock,flags);
+ spin_lock_irqsave(&info->lock, flags);
+ tx_load(info, skb->data, skb->len);
+ spin_unlock_irqrestore(&info->lock, flags);
+
+ /* done with socket buffer, so free it */
+ dev_kfree_skb(skb);
return NETDEV_TX_OK;
}
@@ -2180,7 +2146,7 @@ static void isr_serial(struct slgt_info *info)
if (info->params.mode == MGSL_MODE_ASYNC) {
if (status & IRQ_TXIDLE) {
- if (info->tx_count)
+ if (info->tx_active)
isr_txeom(info, status);
}
if (info->rx_pio && (status & IRQ_RXDATA))
@@ -2276,13 +2242,42 @@ static void isr_tdma(struct slgt_info *info)
}
}
+/*
+ * return true if there are unsent tx DMA buffers, otherwise false
+ *
+ * if there are unsent buffers then info->tbuf_start
+ * is set to index of first unsent buffer
+ */
+static bool unsent_tbufs(struct slgt_info *info)
+{
+ unsigned int i = info->tbuf_current;
+ bool rc = false;
+
+ /*
+ * search backwards from last loaded buffer (precedes tbuf_current)
+ * for first unsent buffer (desc_count > 0)
+ */
+
+ do {
+ if (i)
+ i--;
+ else
+ i = info->tbuf_count - 1;
+ if (!desc_count(info->tbufs[i]))
+ break;
+ info->tbuf_start = i;
+ rc = true;
+ } while (i != info->tbuf_current);
+
+ return rc;
+}
+
static void isr_txeom(struct slgt_info *info, unsigned short status)
{
DBGISR(("%s txeom status=%04x\n", info->device_name, status));
slgt_irq_off(info, IRQ_TXDATA + IRQ_TXIDLE + IRQ_TXUNDER);
tdma_reset(info);
- reset_tbufs(info);
if (status & IRQ_TXUNDER) {
unsigned short val = rd_reg16(info, TCR);
wr_reg16(info, TCR, (unsigned short)(val | BIT2)); /* set reset bit */
@@ -2297,8 +2292,12 @@ static void isr_txeom(struct slgt_info *info, unsigned short status)
info->icount.txok++;
}
+ if (unsent_tbufs(info)) {
+ tx_start(info);
+ update_tx_timer(info);
+ return;
+ }
info->tx_active = false;
- info->tx_count = 0;
del_timer(&info->tx_timer);
@@ -3949,7 +3948,7 @@ static void tx_start(struct slgt_info *info)
info->tx_enabled = true;
}
- if (info->tx_count) {
+ if (desc_count(info->tbufs[info->tbuf_start])) {
info->drop_rts_on_tx_done = false;
if (info->params.mode != MGSL_MODE_ASYNC) {
@@ -4772,25 +4771,36 @@ static unsigned int tbuf_bytes(struct slgt_info *info)
}
/*
- * load transmit DMA buffer(s) with data
+ * load data into transmit DMA buffer ring and start transmitter if needed
+ * return true if data accepted, otherwise false (buffers full)
*/
-static void tx_load(struct slgt_info *info, const char *buf, unsigned int size)
+static bool tx_load(struct slgt_info *info, const char *buf, unsigned int size)
{
unsigned short count;
unsigned int i;
struct slgt_desc *d;
- if (size == 0)
- return;
+ /* check required buffer space */
+ if (DIV_ROUND_UP(size, DMABUFSIZE) > free_tbuf_count(info))
+ return false;
DBGDATA(info, buf, size, "tx");
+ /*
+ * copy data to one or more DMA buffers in circular ring
+ * tbuf_start = first buffer for this data
+ * tbuf_current = next free buffer
+ *
+ * Copy all data before making data visible to DMA controller by
+ * setting descriptor count of the first buffer.
+ * This prevents an active DMA controller from reading the first DMA
+ * buffers of a frame and stopping before the final buffers are filled.
+ */
+
info->tbuf_start = i = info->tbuf_current;
while (size) {
d = &info->tbufs[i];
- if (++i == info->tbuf_count)
- i = 0;
count = (unsigned short)((size > DMABUFSIZE) ? DMABUFSIZE : size);
memcpy(d->buf, buf, count);
@@ -4808,11 +4818,27 @@ static void tx_load(struct slgt_info *info, const char *buf, unsigned int size)
else
set_desc_eof(*d, 0);
- set_desc_count(*d, count);
+ /* set descriptor count for all but first buffer */
+ if (i != info->tbuf_start)
+ set_desc_count(*d, count);
d->buf_count = count;
+
+ if (++i == info->tbuf_count)
+ i = 0;
}
info->tbuf_current = i;
+
+ /* set first buffer count to make new data visible to DMA controller */
+ d = &info->tbufs[info->tbuf_start];
+ set_desc_count(*d, d->buf_count);
+
+ /* start transmitter if needed and update transmit timeout */
+ if (!info->tx_active)
+ tx_start(info);
+ update_tx_timer(info);
+
+ return true;
}
static int register_test(struct slgt_info *info)
@@ -4934,9 +4960,7 @@ static int loopback_test(struct slgt_info *info)
spin_lock_irqsave(&info->lock,flags);
async_mode(info);
rx_start(info);
- info->tx_count = count;
tx_load(info, buf, count);
- tx_start(info);
spin_unlock_irqrestore(&info->lock, flags);
/* wait for receive complete */
diff --git a/drivers/char/tty_buffer.c b/drivers/char/tty_buffer.c
index 66fa4e10d76..f27c4d6d956 100644
--- a/drivers/char/tty_buffer.c
+++ b/drivers/char/tty_buffer.c
@@ -247,7 +247,8 @@ int tty_insert_flip_string(struct tty_struct *tty, const unsigned char *chars,
{
int copied = 0;
do {
- int space = tty_buffer_request_room(tty, size - copied);
+ int goal = min(size - copied, TTY_BUFFER_PAGE);
+ int space = tty_buffer_request_room(tty, goal);
struct tty_buffer *tb = tty->buf.tail;
/* If there is no space then tb may be NULL */
if (unlikely(space == 0))
@@ -283,7 +284,8 @@ int tty_insert_flip_string_flags(struct tty_struct *tty,
{
int copied = 0;
do {
- int space = tty_buffer_request_room(tty, size - copied);
+ int goal = min(size - copied, TTY_BUFFER_PAGE);
+ int space = tty_buffer_request_room(tty, goal);
struct tty_buffer *tb = tty->buf.tail;
/* If there is no space then tb may be NULL */
if (unlikely(space == 0))
diff --git a/drivers/char/tty_ldisc.c b/drivers/char/tty_ldisc.c
index 3f653f7d849..500e740ec5e 100644
--- a/drivers/char/tty_ldisc.c
+++ b/drivers/char/tty_ldisc.c
@@ -706,12 +706,13 @@ static void tty_reset_termios(struct tty_struct *tty)
/**
* tty_ldisc_reinit - reinitialise the tty ldisc
* @tty: tty to reinit
+ * @ldisc: line discipline to reinitialize
*
- * Switch the tty back to N_TTY line discipline and leave the
- * ldisc state closed
+ * Switch the tty to a line discipline and leave the ldisc
+ * state closed
*/
-static void tty_ldisc_reinit(struct tty_struct *tty)
+static void tty_ldisc_reinit(struct tty_struct *tty, int ldisc)
{
struct tty_ldisc *ld;
@@ -721,10 +722,10 @@ static void tty_ldisc_reinit(struct tty_struct *tty)
/*
* Switch the line discipline back
*/
- ld = tty_ldisc_get(N_TTY);
+ ld = tty_ldisc_get(ldisc);
BUG_ON(IS_ERR(ld));
tty_ldisc_assign(tty, ld);
- tty_set_termios_ldisc(tty, N_TTY);
+ tty_set_termios_ldisc(tty, ldisc);
}
/**
@@ -745,6 +746,8 @@ static void tty_ldisc_reinit(struct tty_struct *tty)
void tty_ldisc_hangup(struct tty_struct *tty)
{
struct tty_ldisc *ld;
+ int reset = tty->driver->flags & TTY_DRIVER_RESET_TERMIOS;
+ int err = 0;
/*
* FIXME! What are the locking issues here? This may me overdoing
@@ -772,25 +775,32 @@ void tty_ldisc_hangup(struct tty_struct *tty)
wake_up_interruptible_poll(&tty->read_wait, POLLIN);
/*
* Shutdown the current line discipline, and reset it to
- * N_TTY.
+ * N_TTY if need be.
+ *
+ * Avoid racing set_ldisc or tty_ldisc_release
*/
- if (tty->driver->flags & TTY_DRIVER_RESET_TERMIOS) {
- /* Avoid racing set_ldisc or tty_ldisc_release */
- mutex_lock(&tty->ldisc_mutex);
- tty_ldisc_halt(tty);
- if (tty->ldisc) { /* Not yet closed */
- /* Switch back to N_TTY */
- tty_ldisc_reinit(tty);
- /* At this point we have a closed ldisc and we want to
- reopen it. We could defer this to the next open but
- it means auditing a lot of other paths so this is
- a FIXME */
+ mutex_lock(&tty->ldisc_mutex);
+ tty_ldisc_halt(tty);
+ /* At this point we have a closed ldisc and we want to
+ reopen it. We could defer this to the next open but
+ it means auditing a lot of other paths so this is
+ a FIXME */
+ if (tty->ldisc) { /* Not yet closed */
+ if (reset == 0) {
+ tty_ldisc_reinit(tty, tty->termios->c_line);
+ err = tty_ldisc_open(tty, tty->ldisc);
+ }
+ /* If the re-open fails or we reset then go to N_TTY. The
+ N_TTY open cannot fail */
+ if (reset || err) {
+ tty_ldisc_reinit(tty, N_TTY);
WARN_ON(tty_ldisc_open(tty, tty->ldisc));
- tty_ldisc_enable(tty);
}
- mutex_unlock(&tty->ldisc_mutex);
- tty_reset_termios(tty);
+ tty_ldisc_enable(tty);
}
+ mutex_unlock(&tty->ldisc_mutex);
+ if (reset)
+ tty_reset_termios(tty);
}
/**
diff --git a/drivers/char/vt_ioctl.c b/drivers/char/vt_ioctl.c
index 6aa10284104..87778dcf872 100644
--- a/drivers/char/vt_ioctl.c
+++ b/drivers/char/vt_ioctl.c
@@ -888,7 +888,7 @@ int vt_ioctl(struct tty_struct *tty, struct file * file,
ret = -EFAULT;
goto out;
}
- if (tmp.mode != VT_AUTO && tmp.mode != VT_PROCESS) {
+ if (tmp.mode != VT_AUTO && tmp.mode != VT_PROCESS && tmp.mode != VT_PROCESS_AUTO) {
ret = -EINVAL;
goto out;
}
@@ -1622,7 +1622,7 @@ static void complete_change_console(struct vc_data *vc)
* telling it that it has acquired. Also check if it has died and
* clean up (similar to logic employed in change_console())
*/
- if (vc->vt_mode.mode == VT_PROCESS) {
+ if (vc->vt_mode.mode == VT_PROCESS || vc->vt_mode.mode == VT_PROCESS_AUTO) {
/*
* Send the signal as privileged - kill_pid() will
* tell us if the process has gone or something else
@@ -1682,7 +1682,7 @@ void change_console(struct vc_data *new_vc)
* vt to auto control.
*/
vc = vc_cons[fg_console].d;
- if (vc->vt_mode.mode == VT_PROCESS) {
+ if (vc->vt_mode.mode == VT_PROCESS || vc->vt_mode.mode == VT_PROCESS_AUTO) {
/*
* Send the signal as privileged - kill_pid() will
* tell us if the process has gone or something else
@@ -1693,27 +1693,28 @@ void change_console(struct vc_data *new_vc)
*/
vc->vt_newvt = new_vc->vc_num;
if (kill_pid(vc->vt_pid, vc->vt_mode.relsig, 1) == 0) {
+ if(vc->vt_mode.mode == VT_PROCESS)
+ /*
+ * It worked. Mark the vt to switch to and
+ * return. The process needs to send us a
+ * VT_RELDISP ioctl to complete the switch.
+ */
+ return;
+ } else {
/*
- * It worked. Mark the vt to switch to and
- * return. The process needs to send us a
- * VT_RELDISP ioctl to complete the switch.
+ * The controlling process has died, so we revert back to
+ * normal operation. In this case, we'll also change back
+ * to KD_TEXT mode. I'm not sure if this is strictly correct
+ * but it saves the agony when the X server dies and the screen
+ * remains blanked due to KD_GRAPHICS! It would be nice to do
+ * this outside of VT_PROCESS but there is no single process
+ * to account for and tracking tty count may be undesirable.
*/
- return;
+ reset_vc(vc);
}
/*
- * The controlling process has died, so we revert back to
- * normal operation. In this case, we'll also change back
- * to KD_TEXT mode. I'm not sure if this is strictly correct
- * but it saves the agony when the X server dies and the screen
- * remains blanked due to KD_GRAPHICS! It would be nice to do
- * this outside of VT_PROCESS but there is no single process
- * to account for and tracking tty count may be undesirable.
- */
- reset_vc(vc);
-
- /*
- * Fall through to normal (VT_AUTO) handling of the switch...
+ * Fall through to normal (VT_AUTO and VT_PROCESS_AUTO) handling of the switch...
*/
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-28 02:26:28 +0000