From 31f35939d1d9bcfb3099b32c67b896d2792603f9 Mon Sep 17 00:00:00 2001 From: Alan Cox Date: Fri, 2 Jan 2009 13:45:05 +0000 Subject: [PATCH] tty_port: Add a port level carrier detect operation This is the first step to generalising the various pieces of waiting logic duplicated in all sorts of serial drivers. Signed-off-by: Alan Cox Signed-off-by: Linus Torvalds --- drivers/char/esp.c | 61 ++++++++++++++++++------------- drivers/char/generic_serial.c | 43 +++++++++++----------- drivers/char/isicom.c | 53 ++++++++++++++++----------- drivers/char/istallion.c | 28 ++++++++++----- drivers/char/moxa.c | 26 +++++++++++--- drivers/char/mxser.c | 54 +++++++++++++++++----------- drivers/char/rio/rio_linux.c | 18 +++++----- drivers/char/riscom8.c | 65 +++++++++++++++++++++------------- drivers/char/rocket.c | 40 +++++++++++++-------- drivers/char/ser_a2232.c | 19 +++++----- drivers/char/stallion.c | 28 +++++++++++---- drivers/char/sx.c | 27 +++++++------- drivers/char/synclink.c | 61 ++++++++++++++++++++----------- drivers/char/synclink_gt.c | 48 ++++++++++++++++--------- drivers/char/synclinkmp.c | 55 +++++++++++++++++----------- drivers/char/tty_port.c | 17 +++++++++ drivers/char/vme_scc.c | 15 +++++--- include/linux/generic_serial.h | 1 - include/linux/tty.h | 9 +++++ 19 files changed, 428 insertions(+), 240 deletions(-) diff --git a/drivers/char/esp.c b/drivers/char/esp.c index 7f077c0097f6..45ec263ec012 100644 --- a/drivers/char/esp.c +++ b/drivers/char/esp.c @@ -2054,6 +2054,15 @@ static void esp_hangup(struct tty_struct *tty) wake_up_interruptible(&info->port.open_wait); } +static int esp_carrier_raised(struct tty_port *port) +{ + struct esp_struct *info = container_of(port, struct esp_struct, port); + serial_out(info, UART_ESI_CMD1, ESI_GET_UART_STAT); + if (serial_in(info, UART_ESI_STAT2) & UART_MSR_DCD) + return 1; + return 0; +} + /* * ------------------------------------------------------------ * esp_open() and friends @@ -2066,17 +2075,19 @@ static int block_til_ready(struct tty_struct *tty, struct file *filp, int retval; int do_clocal = 0; unsigned long flags; + int cd; + struct tty_port *port = &info->port; /* * If the device is in the middle of being closed, then block * until it's done, and then try again. */ if (tty_hung_up_p(filp) || - (info->port.flags & ASYNC_CLOSING)) { - if (info->port.flags & ASYNC_CLOSING) - interruptible_sleep_on(&info->port.close_wait); + (port->flags & ASYNC_CLOSING)) { + if (port->flags & ASYNC_CLOSING) + interruptible_sleep_on(&port->close_wait); #ifdef SERIAL_DO_RESTART - if (info->port.flags & ASYNC_HUP_NOTIFY) + if (port->flags & ASYNC_HUP_NOTIFY) return -EAGAIN; else return -ERESTARTSYS; @@ -2091,7 +2102,7 @@ static int block_til_ready(struct tty_struct *tty, struct file *filp, */ if ((filp->f_flags & O_NONBLOCK) || (tty->flags & (1 << TTY_IO_ERROR))) { - info->port.flags |= ASYNC_NORMAL_ACTIVE; + port->flags |= ASYNC_NORMAL_ACTIVE; return 0; } @@ -2101,20 +2112,20 @@ static int block_til_ready(struct tty_struct *tty, struct file *filp, /* * Block waiting for the carrier detect and the line to become * free (i.e., not in use by the callout). While we are in - * this loop, info->port.count is dropped by one, so that + * this loop, port->count is dropped by one, so that * rs_close() knows when to free things. We restore it upon * exit, either normal or abnormal. */ retval = 0; - add_wait_queue(&info->port.open_wait, &wait); + add_wait_queue(&port->open_wait, &wait); #ifdef SERIAL_DEBUG_OPEN printk(KERN_DEBUG "block_til_ready before block: ttys%d, count = %d\n", - info->line, info->port.count); + info->line, port->count); #endif spin_lock_irqsave(&info->lock, flags); if (!tty_hung_up_p(filp)) - info->port.count--; - info->port.blocked_open++; + port->count--; + port->blocked_open++; while (1) { if ((tty->termios->c_cflag & CBAUD)) { unsigned int scratch; @@ -2129,9 +2140,9 @@ static int block_til_ready(struct tty_struct *tty, struct file *filp, } set_current_state(TASK_INTERRUPTIBLE); if (tty_hung_up_p(filp) || - !(info->port.flags & ASYNC_INITIALIZED)) { + !(port->flags & ASYNC_INITIALIZED)) { #ifdef SERIAL_DO_RESTART - if (info->port.flags & ASYNC_HUP_NOTIFY) + if (port->flags & ASYNC_HUP_NOTIFY) retval = -EAGAIN; else retval = -ERESTARTSYS; @@ -2141,11 +2152,9 @@ static int block_til_ready(struct tty_struct *tty, struct file *filp, break; } - serial_out(info, UART_ESI_CMD1, ESI_GET_UART_STAT); - if (serial_in(info, UART_ESI_STAT2) & UART_MSR_DCD) - do_clocal = 1; + cd = tty_port_carrier_raised(port); - if (!(info->port.flags & ASYNC_CLOSING) && + if (!(port->flags & ASYNC_CLOSING) && (do_clocal)) break; if (signal_pending(current)) { @@ -2154,25 +2163,25 @@ static int block_til_ready(struct tty_struct *tty, struct file *filp, } #ifdef SERIAL_DEBUG_OPEN printk(KERN_DEBUG "block_til_ready blocking: ttys%d, count = %d\n", - info->line, info->port.count); + info->line, port->count); #endif spin_unlock_irqrestore(&info->lock, flags); schedule(); spin_lock_irqsave(&info->lock, flags); } set_current_state(TASK_RUNNING); - remove_wait_queue(&info->port.open_wait, &wait); + remove_wait_queue(&port->open_wait, &wait); if (!tty_hung_up_p(filp)) - info->port.count++; - info->port.blocked_open--; + port->count++; + port->blocked_open--; spin_unlock_irqrestore(&info->lock, flags); #ifdef SERIAL_DEBUG_OPEN printk(KERN_DEBUG "block_til_ready after blocking: ttys%d, count = %d\n", - info->line, info->port.count); + info->line, port->count); #endif if (retval) return retval; - info->port.flags |= ASYNC_NORMAL_ACTIVE; + port->flags |= ASYNC_NORMAL_ACTIVE; return 0; } @@ -2329,6 +2338,10 @@ static const struct tty_operations esp_ops = { .tiocmset = esp_tiocmset, }; +static const struct tty_port_operations esp_port_ops = { + .esp_carrier_raised, +}; + /* * The serial driver boot-time initialization code! */ @@ -2415,6 +2428,8 @@ static int __init espserial_init(void) offset = 0; do { + tty_port_init(&info->port); + info->port.ops = &esp_port_ops; info->io_port = esp[i] + offset; info->irq = irq[i]; info->line = (i * 8) + (offset / 8); @@ -2437,8 +2452,6 @@ static int __init espserial_init(void) info->config.flow_off = flow_off; info->config.pio_threshold = pio_threshold; info->next_port = ports; - init_waitqueue_head(&info->port.open_wait); - init_waitqueue_head(&info->port.close_wait); init_waitqueue_head(&info->delta_msr_wait); init_waitqueue_head(&info->break_wait); ports = info; diff --git a/drivers/char/generic_serial.c b/drivers/char/generic_serial.c index c6090f84a2e4..2356994ee010 100644 --- a/drivers/char/generic_serial.c +++ b/drivers/char/generic_serial.c @@ -397,7 +397,8 @@ void gs_hangup(struct tty_struct *tty) int gs_block_til_ready(void *port_, struct file * filp) { - struct gs_port *port = port_; + struct gs_port *gp = port_; + struct tty_port *port = &gp->port; DECLARE_WAITQUEUE(wait, current); int retval; int do_clocal = 0; @@ -409,16 +410,16 @@ int gs_block_til_ready(void *port_, struct file * filp) if (!port) return 0; - tty = port->port.tty; + tty = port->tty; gs_dprintk (GS_DEBUG_BTR, "Entering gs_block_till_ready.\n"); /* * If the device is in the middle of being closed, then block * until it's done, and then try again. */ - if (tty_hung_up_p(filp) || port->port.flags & ASYNC_CLOSING) { - interruptible_sleep_on(&port->port.close_wait); - if (port->port.flags & ASYNC_HUP_NOTIFY) + if (tty_hung_up_p(filp) || port->flags & ASYNC_CLOSING) { + interruptible_sleep_on(&port->close_wait); + if (port->flags & ASYNC_HUP_NOTIFY) return -EAGAIN; else return -ERESTARTSYS; @@ -432,7 +433,7 @@ int gs_block_til_ready(void *port_, struct file * filp) */ if ((filp->f_flags & O_NONBLOCK) || (tty->flags & (1 << TTY_IO_ERROR))) { - port->port.flags |= ASYNC_NORMAL_ACTIVE; + port->flags |= ASYNC_NORMAL_ACTIVE; return 0; } @@ -444,34 +445,34 @@ int gs_block_til_ready(void *port_, struct file * filp) /* * Block waiting for the carrier detect and the line to become * free (i.e., not in use by the callout). While we are in - * this loop, port->port.count is dropped by one, so that + * this loop, port->count is dropped by one, so that * rs_close() knows when to free things. We restore it upon * exit, either normal or abnormal. */ retval = 0; - add_wait_queue(&port->port.open_wait, &wait); + add_wait_queue(&port->open_wait, &wait); gs_dprintk (GS_DEBUG_BTR, "after add waitq.\n"); - spin_lock_irqsave(&port->driver_lock, flags); + spin_lock_irqsave(&gp->driver_lock, flags); if (!tty_hung_up_p(filp)) { - port->port.count--; + port->count--; } - spin_unlock_irqrestore(&port->driver_lock, flags); - port->port.blocked_open++; + spin_unlock_irqrestore(&gp->driver_lock, flags); + port->blocked_open++; while (1) { - CD = port->rd->get_CD (port); + CD = tty_port_carrier_raised(port); gs_dprintk (GS_DEBUG_BTR, "CD is now %d.\n", CD); set_current_state (TASK_INTERRUPTIBLE); if (tty_hung_up_p(filp) || - !(port->port.flags & ASYNC_INITIALIZED)) { - if (port->port.flags & ASYNC_HUP_NOTIFY) + !(port->flags & ASYNC_INITIALIZED)) { + if (port->flags & ASYNC_HUP_NOTIFY) retval = -EAGAIN; else retval = -ERESTARTSYS; break; } - if (!(port->port.flags & ASYNC_CLOSING) && + if (!(port->flags & ASYNC_CLOSING) && (do_clocal || CD)) break; gs_dprintk (GS_DEBUG_BTR, "signal_pending is now: %d (%lx)\n", @@ -483,17 +484,17 @@ int gs_block_til_ready(void *port_, struct file * filp) schedule(); } gs_dprintk (GS_DEBUG_BTR, "Got out of the loop. (%d)\n", - port->port.blocked_open); + port->blocked_open); set_current_state (TASK_RUNNING); - remove_wait_queue(&port->port.open_wait, &wait); + remove_wait_queue(&port->open_wait, &wait); if (!tty_hung_up_p(filp)) { - port->port.count++; + port->count++; } - port->port.blocked_open--; + port->blocked_open--; if (retval) return retval; - port->port.flags |= ASYNC_NORMAL_ACTIVE; + port->flags |= ASYNC_NORMAL_ACTIVE; func_exit (); return 0; } diff --git a/drivers/char/isicom.c b/drivers/char/isicom.c index 04e4549299ba..b3da4858fd4a 100644 --- a/drivers/char/isicom.c +++ b/drivers/char/isicom.c @@ -830,20 +830,28 @@ static int isicom_setup_port(struct tty_struct *tty) return 0; } -static int block_til_ready(struct tty_struct *tty, struct file *filp, - struct isi_port *port) +static int isicom_carrier_raised(struct tty_port *port) { - struct isi_board *card = port->card; + struct isi_port *ip = container_of(port, struct isi_port, port); + return (ip->status & ISI_DCD)?1 : 0; +} + +static int block_til_ready(struct tty_struct *tty, struct file *filp, + struct isi_port *ip) +{ + struct isi_board *card = ip->card; + struct tty_port *port = &ip->port; int do_clocal = 0, retval; unsigned long flags; DECLARE_WAITQUEUE(wait, current); + int cd; /* block if port is in the process of being closed */ - if (tty_hung_up_p(filp) || port->port.flags & ASYNC_CLOSING) { + if (tty_hung_up_p(filp) || port->flags & ASYNC_CLOSING) { pr_dbg("block_til_ready: close in progress.\n"); - interruptible_sleep_on(&port->port.close_wait); - if (port->port.flags & ASYNC_HUP_NOTIFY) + interruptible_sleep_on(&port->close_wait); + if (port->flags & ASYNC_HUP_NOTIFY) return -EAGAIN; else return -ERESTARTSYS; @@ -854,7 +862,7 @@ static int block_til_ready(struct tty_struct *tty, struct file *filp, if ((filp->f_flags & O_NONBLOCK) || (tty->flags & (1 << TTY_IO_ERROR))) { pr_dbg("block_til_ready: non-block mode.\n"); - port->port.flags |= ASYNC_NORMAL_ACTIVE; + port->flags |= ASYNC_NORMAL_ACTIVE; return 0; } @@ -864,29 +872,29 @@ static int block_til_ready(struct tty_struct *tty, struct file *filp, /* block waiting for DCD to be asserted, and while callout dev is busy */ retval = 0; - add_wait_queue(&port->port.open_wait, &wait); + add_wait_queue(&port->open_wait, &wait); spin_lock_irqsave(&card->card_lock, flags); if (!tty_hung_up_p(filp)) - port->port.count--; - port->port.blocked_open++; + port->count--; + port->blocked_open++; spin_unlock_irqrestore(&card->card_lock, flags); while (1) { - raise_dtr_rts(port); + raise_dtr_rts(ip); set_current_state(TASK_INTERRUPTIBLE); - if (tty_hung_up_p(filp) || !(port->port.flags & ASYNC_INITIALIZED)) { - if (port->port.flags & ASYNC_HUP_NOTIFY) + if (tty_hung_up_p(filp) || !(port->flags & ASYNC_INITIALIZED)) { + if (port->flags & ASYNC_HUP_NOTIFY) retval = -EAGAIN; else retval = -ERESTARTSYS; break; } - if (!(port->port.flags & ASYNC_CLOSING) && - (do_clocal || (port->status & ISI_DCD))) { + cd = tty_port_carrier_raised(port); + if (!(port->flags & ASYNC_CLOSING) && + (do_clocal || cd)) break; - } if (signal_pending(current)) { retval = -ERESTARTSYS; break; @@ -894,15 +902,15 @@ static int block_til_ready(struct tty_struct *tty, struct file *filp, schedule(); } set_current_state(TASK_RUNNING); - remove_wait_queue(&port->port.open_wait, &wait); + remove_wait_queue(&port->open_wait, &wait); spin_lock_irqsave(&card->card_lock, flags); if (!tty_hung_up_p(filp)) - port->port.count++; - port->port.blocked_open--; + port->count++; + port->blocked_open--; spin_unlock_irqrestore(&card->card_lock, flags); if (retval) return retval; - port->port.flags |= ASYNC_NORMAL_ACTIVE; + port->flags |= ASYNC_NORMAL_ACTIVE; return 0; } @@ -1452,6 +1460,10 @@ static const struct tty_operations isicom_ops = { .break_ctl = isicom_send_break, }; +static const struct tty_port_operations isicom_port_ops = { + .carrier_raised = isicom_carrier_raised, +}; + static int __devinit reset_card(struct pci_dev *pdev, const unsigned int card, unsigned int *signature) { @@ -1794,6 +1806,7 @@ static int __init isicom_init(void) spin_lock_init(&isi_card[idx].card_lock); for (channel = 0; channel < 16; channel++, port++) { tty_port_init(&port->port); + port->port.ops = &isicom_port_ops; port->magic = ISICOM_MAGIC; port->card = &isi_card[idx]; port->channel = channel; diff --git a/drivers/char/istallion.c b/drivers/char/istallion.c index 4b10770fa937..c4682f9e34bb 100644 --- a/drivers/char/istallion.c +++ b/drivers/char/istallion.c @@ -151,7 +151,7 @@ static char *stli_drvversion = "5.6.0"; static char *stli_serialname = "ttyE"; static struct tty_driver *stli_serial; - +static const struct tty_port_operations stli_port_ops; #define STLI_TXBUFSIZE 4096 @@ -1183,6 +1183,12 @@ static int stli_setport(struct tty_struct *tty) /*****************************************************************************/ +static int stli_carrier_raised(struct tty_port *port) +{ + struct stliport *portp = container_of(port, struct stliport, port); + return (portp->sigs & TIOCM_CD) ? 1 : 0; +} + /* * Possibly need to wait for carrier (DCD signal) to come high. Say * maybe because if we are clocal then we don't need to wait... @@ -1193,6 +1199,7 @@ static int stli_waitcarrier(struct tty_struct *tty, struct stlibrd *brdp, { unsigned long flags; int rc, doclocal; + struct tty_port *port = &portp->port; rc = 0; doclocal = 0; @@ -1203,7 +1210,7 @@ static int stli_waitcarrier(struct tty_struct *tty, struct stlibrd *brdp, spin_lock_irqsave(&stli_lock, flags); portp->openwaitcnt++; if (! tty_hung_up_p(filp)) - portp->port.count--; + port->count--; spin_unlock_irqrestore(&stli_lock, flags); for (;;) { @@ -1212,27 +1219,27 @@ static int stli_waitcarrier(struct tty_struct *tty, struct stlibrd *brdp, &portp->asig, sizeof(asysigs_t), 0)) < 0) break; if (tty_hung_up_p(filp) || - ((portp->port.flags & ASYNC_INITIALIZED) == 0)) { - if (portp->port.flags & ASYNC_HUP_NOTIFY) + ((port->flags & ASYNC_INITIALIZED) == 0)) { + if (port->flags & ASYNC_HUP_NOTIFY) rc = -EBUSY; else rc = -ERESTARTSYS; break; } - if (((portp->port.flags & ASYNC_CLOSING) == 0) && - (doclocal || (portp->sigs & TIOCM_CD))) { + if (((port->flags & ASYNC_CLOSING) == 0) && + (doclocal || tty_port_carrier_raised(port))) { break; } if (signal_pending(current)) { rc = -ERESTARTSYS; break; } - interruptible_sleep_on(&portp->port.open_wait); + interruptible_sleep_on(&port->open_wait); } spin_lock_irqsave(&stli_lock, flags); if (! tty_hung_up_p(filp)) - portp->port.count++; + port->count++; portp->openwaitcnt--; spin_unlock_irqrestore(&stli_lock, flags); @@ -2696,6 +2703,7 @@ static int stli_initports(struct stlibrd *brdp) continue; } tty_port_init(&portp->port); + portp->port.ops = &stli_port_ops; portp->magic = STLI_PORTMAGIC; portp->portnr = i; portp->brdnr = brdp->brdnr; @@ -4518,6 +4526,10 @@ static const struct tty_operations stli_ops = { .tiocmset = stli_tiocmset, }; +static const struct tty_port_operations stli_port_ops = { + .carrier_raised = stli_carrier_raised, +}; + /*****************************************************************************/ /* * Loadable module initialization stuff. diff --git a/drivers/char/moxa.c b/drivers/char/moxa.c index 12d327a2c9ba..8b0da97d5293 100644 --- a/drivers/char/moxa.c +++ b/drivers/char/moxa.c @@ -206,6 +206,7 @@ static void moxa_poll(unsigned long); static void moxa_set_tty_param(struct tty_struct *, struct ktermios *); static void moxa_setup_empty_event(struct tty_struct *); static void moxa_shut_down(struct tty_struct *); +static int moxa_carrier_raised(struct tty_port *); /* * moxa board interface functions: */ @@ -405,6 +406,10 @@ static const struct tty_operations moxa_ops = { .tiocmset = moxa_tiocmset, }; +static const struct tty_port_operations moxa_port_ops = { + .carrier_raised = moxa_carrier_raised, +}; + static struct tty_driver *moxaDriver; static DEFINE_TIMER(moxaTimer, moxa_poll, 0, 0); static DEFINE_SPINLOCK(moxa_lock); @@ -826,6 +831,7 @@ static int moxa_init_board(struct moxa_board_conf *brd, struct device *dev) for (i = 0, p = brd->ports; i < MAX_PORTS_PER_BOARD; i++, p++) { tty_port_init(&p->port); + p->port.ops = &moxa_port_ops; p->type = PORT_16550A; p->cflag = B9600 | CS8 | CREAD | CLOCAL | HUPCL; } @@ -1115,15 +1121,27 @@ static void moxa_close_port(struct tty_struct *tty) tty_port_tty_set(&ch->port, NULL); } +static int moxa_carrier_raised(struct tty_port *port) +{ + struct moxa_port *ch = container_of(port, struct moxa_port, port); + int dcd; + + spin_lock_bh(&moxa_lock); + dcd = ch->DCDState; + spin_unlock_bh(&moxa_lock); + return dcd; +} + static int moxa_block_till_ready(struct tty_struct *tty, struct file *filp, struct moxa_port *ch) { + struct tty_port *port = &ch->port; DEFINE_WAIT(wait); int retval = 0; u8 dcd; while (1) { - prepare_to_wait(&ch->port.open_wait, &wait, TASK_INTERRUPTIBLE); + prepare_to_wait(&port->open_wait, &wait, TASK_INTERRUPTIBLE); if (tty_hung_up_p(filp)) { #ifdef SERIAL_DO_RESTART retval = -ERESTARTSYS; @@ -1132,9 +1150,7 @@ static int moxa_block_till_ready(struct tty_struct *tty, struct file *filp, #endif break; } - spin_lock_bh(&moxa_lock); - dcd = ch->DCDState; - spin_unlock_bh(&moxa_lock); + dcd = tty_port_carrier_raised(port); if (dcd) break; @@ -1144,7 +1160,7 @@ static int moxa_block_till_ready(struct tty_struct *tty, struct file *filp, } schedule(); } - finish_wait(&ch->port.open_wait, &wait); + finish_wait(&port->open_wait, &wait); return retval; } diff --git a/drivers/char/mxser.c b/drivers/char/mxser.c index 047766915411..eafbbcf355e7 100644 --- a/drivers/char/mxser.c +++ b/drivers/char/mxser.c @@ -541,13 +541,21 @@ static unsigned char mxser_get_msr(int baseaddr, int mode, int port) return status; } +static int mxser_carrier_raised(struct tty_port *port) +{ + struct mxser_port *mp = container_of(port, struct mxser_port, port); + return (inb(mp->ioaddr + UART_MSR) & UART_MSR_DCD)?1:0; +} + static int mxser_block_til_ready(struct tty_struct *tty, struct file *filp, - struct mxser_port *port) + struct mxser_port *mp) { DECLARE_WAITQUEUE(wait, current); int retval; int do_clocal = 0; unsigned long flags; + int cd; + struct tty_port *port = &mp->port; /* * If non-blocking mode is set, or the port is not enabled, @@ -555,7 +563,7 @@ static int mxser_block_til_ready(struct tty_struct *tty, struct file *filp, */ if ((filp->f_flags & O_NONBLOCK) || test_bit(TTY_IO_ERROR, &tty->flags)) { - port->port.flags |= ASYNC_NORMAL_ACTIVE; + port->flags |= ASYNC_NORMAL_ACTIVE; return 0; } @@ -565,34 +573,33 @@ static int mxser_block_til_ready(struct tty_struct *tty, struct file *filp, /* * Block waiting for the carrier detect and the line to become * free (i.e., not in use by the callout). While we are in - * this loop, port->port.count is dropped by one, so that + * this loop, port->count is dropped by one, so that * mxser_close() knows when to free things. We restore it upon * exit, either normal or abnormal. */ retval = 0; - add_wait_queue(&port->port.open_wait, &wait); + add_wait_queue(&port->open_wait, &wait); - spin_lock_irqsave(&port->slock, flags); + spin_lock_irqsave(&mp->slock, flags); if (!tty_hung_up_p(filp)) - port->port.count--; - spin_unlock_irqrestore(&port->slock, flags); - port->port.blocked_open++; + port->count--; + spin_unlock_irqrestore(&mp->slock, flags); + port->blocked_open++; while (1) { - spin_lock_irqsave(&port->slock, flags); - outb(inb(port->ioaddr + UART_MCR) | - UART_MCR_DTR | UART_MCR_RTS, port->ioaddr + UART_MCR); - spin_unlock_irqrestore(&port->slock, flags); + spin_lock_irqsave(&mp->slock, flags); + outb(inb(mp->ioaddr + UART_MCR) | + UART_MCR_DTR | UART_MCR_RTS, mp->ioaddr + UART_MCR); + spin_unlock_irqrestore(&mp->slock, flags); set_current_state(TASK_INTERRUPTIBLE); - if (tty_hung_up_p(filp) || !(port->port.flags & ASYNC_INITIALIZED)) { - if (port->port.flags & ASYNC_HUP_NOTIFY) + if (tty_hung_up_p(filp) || !(port->flags & ASYNC_INITIALIZED)) { + if (port->flags & ASYNC_HUP_NOTIFY) retval = -EAGAIN; else retval = -ERESTARTSYS; break; } - if (!(port->port.flags & ASYNC_CLOSING) && - (do_clocal || - (inb(port->ioaddr + UART_MSR) & UART_MSR_DCD))) + cd = tty_port_carrier_raised(port); + if (!(port->flags & ASYNC_CLOSING) && (do_clocal || cd)) break; if (signal_pending(current)) { retval = -ERESTARTSYS; @@ -601,13 +608,13 @@ static int mxser_block_til_ready(struct tty_struct *tty, struct file *filp, schedule(); } set_current_state(TASK_RUNNING); - remove_wait_queue(&port->port.open_wait, &wait); + remove_wait_queue(&port->open_wait, &wait); if (!tty_hung_up_p(filp)) - port->port.count++; - port->port.blocked_open--; + port->count++; + port->blocked_open--; if (retval) return retval; - port->port.flags |= ASYNC_NORMAL_ACTIVE; + port->flags |= ASYNC_NORMAL_ACTIVE; return 0; } @@ -2449,6 +2456,10 @@ static const struct tty_operations mxser_ops = { .tiocmset = mxser_tiocmset, }; +struct tty_port_operations mxser_port_ops = { + .carrier_raised = mxser_carrier_raised, +}; + /* * The MOXA Smartio/Industio serial driver boot-time initialization code! */ @@ -2482,6 +2493,7 @@ static int __devinit mxser_initbrd(struct mxser_board *brd, for (i = 0; i < brd->info->nports; i++) { info = &brd->ports[i]; tty_port_init(&info->port); + info->port.ops = &mxser_port_ops; info->board = brd; info->stop_rx = 0; info->ldisc_stop_rx = 0; diff --git a/drivers/char/rio/rio_linux.c b/drivers/char/rio/rio_linux.c index a8f68a3f14dd..ec2afd139472 100644 --- a/drivers/char/rio/rio_linux.c +++ b/drivers/char/rio/rio_linux.c @@ -173,7 +173,7 @@ static void rio_disable_tx_interrupts(void *ptr); static void rio_enable_tx_interrupts(void *ptr); static void rio_disable_rx_interrupts(void *ptr); static void rio_enable_rx_interrupts(void *ptr); -static int rio_get_CD(void *ptr); +static int rio_carrier_raised(struct tty_port *port); static void rio_shutdown_port(void *ptr); static int rio_set_real_termios(void *ptr); static void rio_hungup(void *ptr); @@ -224,7 +224,6 @@ static struct real_driver rio_real_driver = { rio_enable_tx_interrupts, rio_disable_rx_interrupts, rio_enable_rx_interrupts, - rio_get_CD, rio_shutdown_port, rio_set_real_termios, rio_chars_in_buffer, @@ -476,9 +475,9 @@ static void rio_enable_rx_interrupts(void *ptr) /* Jeez. Isn't this simple? */ -static int rio_get_CD(void *ptr) +static int rio_carrier_raised(struct tty_port *port) { - struct Port *PortP = ptr; + struct Port *PortP = container_of(port, struct Port, gs.port); int rv; func_enter(); @@ -806,7 +805,9 @@ static void *ckmalloc(int size) return p; } - +static const struct tty_port_operations rio_port_ops = { + .carrier_raised = rio_carrier_raised, +}; static int rio_init_datastructures(void) { @@ -842,17 +843,14 @@ static int rio_init_datastructures(void) goto free6; } rio_dprintk(RIO_DEBUG_INIT, "initing port %d (%d)\n", i, port->Mapped); + tty_port_init(&port->gs.port); + port->gs.port.ops = &rio_port_ops; port->PortNum = i; port->gs.magic = RIO_MAGIC; port->gs.close_delay = HZ / 2; port->gs.closing_wait = 30 * HZ; port->gs.rd = &rio_real_driver; spin_lock_init(&port->portSem); - /* - * Initializing wait queue - */ - init_waitqueue_head(&port->gs.port.open_wait); - init_waitqueue_head(&port->gs.port.close_wait); } #else /* We could postpone initializing them to when they are configured. */ diff --git a/drivers/char/riscom8.c b/drivers/char/riscom8.c index 2c6c8f33d6b4..6ad1c2aa2a98 100644 --- a/drivers/char/riscom8.c +++ b/drivers/char/riscom8.c @@ -857,23 +857,40 @@ static void rc_shutdown_port(struct tty_struct *tty, rc_shutdown_board(bp); } +static int carrier_raised(struct tty_port *port) +{ + struct riscom_port *p = container_of(port, struct riscom_port, port); + struct riscom_board *bp = port_Board(p); + unsigned long flags; + int CD; + + spin_lock_irqsave(&riscom_lock, flags); + rc_out(bp, CD180_CAR, port_No(p)); + CD = rc_in(bp, CD180_MSVR) & MSVR_CD; + rc_out(bp, CD180_MSVR, MSVR_RTS); + bp->DTR &= ~(1u << port_No(p)); + rc_out(bp, RC_DTR, bp->DTR); + spin_unlock_irqrestore(&riscom_lock, flags); + return CD; +} + static int block_til_ready(struct tty_struct *tty, struct file *filp, - struct riscom_port *port) + struct riscom_port *rp) { DECLARE_WAITQUEUE(wait, current); - struct riscom_board *bp = port_Board(port); int retval; int do_clocal = 0; int CD; unsigned long flags; + struct tty_port *port = &rp->port; /* * If the device is in the middle of being closed, then block * until it's done, and then try again. */ - if (tty_hung_up_p(filp) || port->port.flags & ASYNC_CLOSING) { - interruptible_sleep_on(&port->port.close_wait); - if (port->port.flags & ASYNC_HUP_NOTIFY) + if (tty_hung_up_p(filp) || port->flags & ASYNC_CLOSING) { + interruptible_sleep_on(&port->close_wait); + if (port->flags & ASYNC_HUP_NOTIFY) return -EAGAIN; else return -ERESTARTSYS; @@ -885,7 +902,7 @@ static int block_til_ready(struct tty_struct *tty, struct file *filp, */ if ((filp->f_flags & O_NONBLOCK) || (tty->flags & (1 << TTY_IO_ERROR))) { - port->port.flags |= ASYNC_NORMAL_ACTIVE; + port->flags |= ASYNC_NORMAL_ACTIVE; return 0; } @@ -900,37 +917,29 @@ static int block_til_ready(struct tty_struct *tty, struct file *filp, * exit, either normal or abnormal. */ retval = 0; - add_wait_queue(&port->port.open_wait, &wait); + add_wait_queue(&port->open_wait, &wait); spin_lock_irqsave(&riscom_lock, flags); if (!tty_hung_up_p(filp)) - port->port.count--; + port->count--; spin_unlock_irqrestore(&riscom_lock, flags); - port->port.blocked_open++; + port->blocked_open++; while (1) { - spin_lock_irqsave(&riscom_lock, flags); - - rc_out(bp, CD180_CAR, port_No(port)); - CD = rc_in(bp, CD180_MSVR) & MSVR_CD; - rc_out(bp, CD180_MSVR, MSVR_RTS); - bp->DTR &= ~(1u << port_No(port)); - rc_out(bp, RC_DTR, bp->DTR); - - spin_unlock_irqrestore(&riscom_lock, flags); + CD = tty_port_carrier_raised(port); set_current_state(TASK_INTERRUPTIBLE); if (tty_hung_up_p(filp) || - !(port->port.flags & ASYNC_INITIALIZED)) { - if (port->port.flags & ASYNC_HUP_NOTIFY) + !(port->flags & ASYNC_INITIALIZED)) { + if (port->flags & ASYNC_HUP_NOTIFY) retval = -EAGAIN; else retval = -ERESTARTSYS; break; } - if (!(port->port.flags & ASYNC_CLOSING) && + if (!(port->flags & ASYNC_CLOSING) && (do_clocal || CD)) break; if (signal_pending(current)) { @@ -940,14 +949,14 @@ static int block_til_ready(struct tty_struct *tty, struct file *filp, schedule(); } __set_current_state(TASK_RUNNING); - remove_wait_queue(&port->port.open_wait, &wait); + remove_wait_queue(&port->open_wait, &wait); if (!tty_hung_up_p(filp)) - port->port.count++; - port->port.blocked_open--; + port->count++; + port->blocked_open--; if (retval) return retval; - port->port.flags |= ASYNC_NORMAL_ACTIVE; + port->flags |= ASYNC_NORMAL_ACTIVE; return 0; } @@ -1510,6 +1519,11 @@ static const struct tty_operations riscom_ops = { .break_ctl = rc_send_break, }; +static const struct tty_port_operations riscom_port_ops = { + .carrier_raised = carrier_raised, +}; + + static int __init rc_init_drivers(void) { int error; @@ -1541,6 +1555,7 @@ static int __init rc_init_drivers(void) memset(rc_port, 0, sizeof(rc_port)); for (i = 0; i < RC_NPORT * RC_NBOARD; i++) { tty_port_init(&rc_port[i].port); + rc_port[i].port.ops = &riscom_port_ops; rc_port[i].magic = RISCOM8_MAGIC; } return 0; diff --git a/drivers/char/rocket.c b/drivers/char/rocket.c index 584d791e84a6..4a4110e703a5 100644 --- a/drivers/char/rocket.c +++ b/drivers/char/rocket.c @@ -135,6 +135,7 @@ static int rcktpt_type[NUM_BOARDS]; static int is_PCI[NUM_BOARDS]; static rocketModel_t rocketModel[NUM_BOARDS]; static int max_board; +static const struct tty_port_operations rocket_port_ops; /* * The following arrays define the interrupt bits corresponding to each AIOP. @@ -649,9 +650,8 @@ static void init_r_port(int board, int aiop, int chan, struct pci_dev *pci_dev) info->board = board; info->aiop = aiop; info->chan = chan; - info->port.closing_wait = 3000; - info->port.close_delay = 50; - init_waitqueue_head(&info->port.open_wait); + tty_port_init(&info->port); + info->port.ops = &rocket_port_ops; init_completion(&info->close_wait); info->flags &= ~ROCKET_MODE_MASK; switch (pc104[board][line]) { @@ -864,11 +864,18 @@ static void configure_r_port(struct r_port *info, } } +static int carrier_raised(struct tty_port *port) +{ + struct r_port *info = container_of(port, struct r_port, port); + return (sGetChanStatusLo(&info->channel) & CD_ACT) ? 1 : 0; +} + /* info->port.count is considered critical, protected by spinlocks. */ static int block_til_ready(struct tty_struct *tty, struct file *filp, struct r_port *info) { DECLARE_WAITQUEUE(wait, current); + struct tty_port *port = &info->port; int retval; int do_clocal = 0, extra_count = 0; unsigned long flags; @@ -898,13 +905,13 @@ static int block_til_ready(struct tty_struct *tty, struct file *filp, /* * Block waiting for the carrier detect and the line to become free. While we are in - * this loop, info->port.count is dropped by one, so that rp_close() knows when to free things. + * this loop, port->count is dropped by one, so that rp_close() knows when to free things. * We restore it upon exit, either normal or abnormal. */ retval = 0; - add_wait_queue(&info->port.open_wait, &wait); + add_wait_queue(&port->open_wait, &wait); #ifdef ROCKET_DEBUG_OPEN - printk(KERN_INFO "block_til_ready before block: ttyR%d, count = %d\n", info->line, info->port.count); + printk(KERN_INFO "block_til_ready before block: ttyR%d, count = %d\n", info->line, port->count); #endif spin_lock_irqsave(&info->slock, flags); @@ -913,10 +920,10 @@ static int block_til_ready(struct tty_struct *tty, struct file *filp, #else if (!tty_hung_up_p(filp)) { extra_count = 1; - info->port.count--; + port->count--; } #endif - info->port.blocked_open++; + port->blocked_open++; spin_unlock_irqrestore(&info->slock, flags); @@ -933,7 +940,8 @@ static int block_til_ready(struct tty_struct *tty, struct file *filp, retval = -ERESTARTSYS; break; } - if (!(info->flags & ROCKET_CLOSING) && (do_clocal || (sGetChanStatusLo(&info->channel) & CD_ACT))) + if (!(info->flags & ROCKET_CLOSING) && + (do_clocal || tty_port_carrier_raised(port))) break; if (signal_pending(current)) { retval = -ERESTARTSYS; @@ -941,24 +949,24 @@ static int block_til_ready(struct tty_struct *tty, struct file *filp, } #ifdef ROCKET_DEBUG_OPEN printk(KERN_INFO "block_til_ready blocking: ttyR%d, count = %d, flags=0x%0x\n", - info->line, info->port.count, info->flags); + info->line, port->count, info->flags); #endif schedule(); /* Don't hold spinlock here, will hang PC */ } __set_current_state(TASK_RUNNING); - remove_wait_queue(&info->port.open_wait, &wait); + remove_wait_queue(&port->open_wait, &wait); spin_lock_irqsave(&info->slock, flags); if (extra_count) - info->port.count++; - info->port.blocked_open--; + port->count++; + port->blocked_open--; spin_unlock_irqrestore(&info->slock, flags); #ifdef ROCKET_DEBUG_OPEN printk(KERN_INFO "block_til_ready after blocking: ttyR%d, count = %d\n", - info->line, info->port.count); + info->line, port->count); #endif if (retval) return retval; @@ -2371,6 +2379,10 @@ static const struct tty_operations rocket_ops = { .tiocmset = rp_tiocmset, }; +static const struct tty_port_operations rocket_port_ops = { + .carrier_raised = carrier_raised, +}; + /* * The module "startup" routine; it's run when the module is loaded. */ diff --git a/drivers/char/ser_a2232.c b/drivers/char/ser_a2232.c index 7b0c35207d9b..0c97f34df63a 100644 --- a/drivers/char/ser_a2232.c +++ b/drivers/char/ser_a2232.c @@ -122,7 +122,7 @@ static void a2232_disable_tx_interrupts(void *ptr); static void a2232_enable_tx_interrupts(void *ptr); static void a2232_disable_rx_interrupts(void *ptr); static void a2232_enable_rx_interrupts(void *ptr); -static int a2232_get_CD(void *ptr); +static int a2232_carrier_raised(struct tty_port *port); static void a2232_shutdown_port(void *ptr); static int a2232_set_real_termios(void *ptr); static int a2232_chars_in_buffer(void *ptr); @@ -148,7 +148,6 @@ static struct real_driver a2232_real_driver = { a2232_enable_tx_interrupts, a2232_disable_rx_interrupts, a2232_enable_rx_interrupts, - a2232_get_CD, a2232_shutdown_port, a2232_set_real_termios, a2232_chars_in_buffer, @@ -260,9 +259,10 @@ static void a2232_enable_rx_interrupts(void *ptr) port->disable_rx = 0; } -static int a2232_get_CD(void *ptr) +static int a2232_carrier_raised(struct tty_port *port) { - return ((struct a2232_port *) ptr)->cd_status; + struct a2232_port *ap = container_of(port, struct a2232_port, gs.port); + return ap->cd_status; } static void a2232_shutdown_port(void *ptr) @@ -638,6 +638,10 @@ int ch, err, n, p; return IRQ_HANDLED; } +static const struct tty_port_operations a2232_port_ops = { + .carrier_raised = a2232_carrier_raised, +}; + static void a2232_init_portstructs(void) { struct a2232_port *port; @@ -645,6 +649,8 @@ static void a2232_init_portstructs(void) for (i = 0; i < MAX_A2232_BOARDS*NUMLINES; i++) { port = a2232_ports + i; + tty_port_init(&port->gs.port); + port->gs.port.ops = &a2232_port_ops; port->which_a2232 = i/NUMLINES; port->which_port_on_a2232 = i%NUMLINES; port->disable_rx = port->throttle_input = port->cd_status = 0; @@ -652,11 +658,6 @@ static void a2232_init_portstructs(void) port->gs.close_delay = HZ/2; port->gs.closing_wait = 30 * HZ; port->gs.rd = &a2232_real_driver; -#ifdef NEW_WRITE_LOCKING - mutex_init(&(port->gs.port_write_mutex)); -#endif - init_waitqueue_head(&port->gs.port.open_wait); - init_waitqueue_head(&port->gs.port.close_wait); } } diff --git a/drivers/char/stallion.c b/drivers/char/stallion.c index 963b03fb29e5..12aecdaf61ec 100644 --- a/drivers/char/stallion.c +++ b/drivers/char/stallion.c @@ -130,6 +130,8 @@ static char stl_unwanted[SC26198_RXFIFOSIZE]; static DEFINE_MUTEX(stl_brdslock); static struct stlbrd *stl_brds[STL_MAXBRDS]; +static const struct tty_port_operations stl_port_ops; + /* * Per board state flags. Used with the state field of the board struct. * Not really much here! @@ -786,6 +788,12 @@ static int stl_open(struct tty_struct *tty, struct file *filp) /*****************************************************************************/ +static int stl_carrier_raised(struct tty_port *port) +{ + struct stlport *portp = container_of(port, struct stlport, port); + return (portp->sigs & TIOCM_CD) ? 1 : 0; +} + /* * Possibly need to wait for carrier (DCD signal) to come high. Say * maybe because if we are clocal then we don't need to wait... @@ -796,6 +804,7 @@ static int stl_waitcarrier(struct tty_struct *tty, struct stlport *portp, { unsigned long flags; int rc, doclocal; + struct tty_port *port = &portp->port; pr_debug("stl_waitcarrier(portp=%p,filp=%p)\n", portp, filp); @@ -809,32 +818,32 @@ static int stl_waitcarrier(struct tty_struct *tty, struct stlport *portp, portp->openwaitcnt++; if (! tty_hung_up_p(filp)) - portp->port.count--; + port->count--; for (;;) { /* Takes brd_lock internally */ stl_setsignals(portp, 1, 1); if (tty_hung_up_p(filp) || - ((portp->port.flags & ASYNC_INITIALIZED) == 0)) { - if (portp->port.flags & ASYNC_HUP_NOTIFY) + ((port->flags & ASYNC_INITIALIZED) == 0)) { + if (port->flags & ASYNC_HUP_NOTIFY) rc = -EBUSY; else rc = -ERESTARTSYS; break; } - if (((portp->port.flags & ASYNC_CLOSING) == 0) && - (doclocal || (portp->sigs & TIOCM_CD))) + if (((port->flags & ASYNC_CLOSING) == 0) && + (doclocal || tty_port_carrier_raised(port))) break; if (signal_pending(current)) { rc = -ERESTARTSYS; break; } /* FIXME */ - interruptible_sleep_on(&portp->port.open_wait); + interruptible_sleep_on(&port->open_wait); } if (! tty_hung_up_p(filp)) - portp->port.count++; + port->count++; portp->openwaitcnt--; spin_unlock_irqrestore(&stallion_lock, flags); @@ -1776,6 +1785,7 @@ static int __devinit stl_initports(struct stlbrd *brdp, struct stlpanel *panelp) break; } tty_port_init(&portp->port); + portp->port.ops = &stl_port_ops; portp->magic = STL_PORTMAGIC; portp->portnr = i; portp->brdnr = panelp->brdnr; @@ -2659,6 +2669,10 @@ static const struct tty_operations stl_ops = { .tiocmset = stl_tiocmset, }; +static const struct tty_port_operations stl_port_ops = { + .carrier_raised = stl_carrier_raised, +}; + /*****************************************************************************/ /* CD1400 HARDWARE FUNCTIONS */ /*****************************************************************************/ diff --git a/drivers/char/sx.c b/drivers/char/sx.c index ba4e86281fbf..a71bc58abe7f 100644 --- a/drivers/char/sx.c +++ b/drivers/char/sx.c @@ -279,7 +279,7 @@ static void sx_disable_tx_interrupts(void *ptr); static void sx_enable_tx_interrupts(void *ptr); static void sx_disable_rx_interrupts(void *ptr); static void sx_enable_rx_interrupts(void *ptr); -static int sx_get_CD(void *ptr); +static int sx_carrier_raised(struct tty_port *port); static void sx_shutdown_port(void *ptr); static int sx_set_real_termios(void *ptr); static void sx_close(void *ptr); @@ -360,7 +360,6 @@ static struct real_driver sx_real_driver = { sx_enable_tx_interrupts, sx_disable_rx_interrupts, sx_enable_rx_interrupts, - sx_get_CD, sx_shutdown_port, sx_set_real_termios, sx_chars_in_buffer, @@ -791,7 +790,7 @@ static int sx_getsignals(struct sx_port *port) sx_dprintk(SX_DEBUG_MODEMSIGNALS, "getsignals: %d/%d (%d/%d) " "%02x/%02x\n", (o_stat & OP_DTR) != 0, (o_stat & OP_RTS) != 0, - port->c_dcd, sx_get_CD(port), + port->c_dcd, tty_port_carrier_raised(&port->gs.port), sx_read_channel_byte(port, hi_ip), sx_read_channel_byte(port, hi_state)); @@ -1190,7 +1189,7 @@ static inline void sx_check_modem_signals(struct sx_port *port) hi_state = sx_read_channel_byte(port, hi_state); sx_dprintk(SX_DEBUG_MODEMSIGNALS, "Checking modem signals (%d/%d)\n", - port->c_dcd, sx_get_CD(port)); + port->c_dcd, tty_port_carrier_raised(&port->gs.port)); if (hi_state & ST_BREAK) { hi_state &= ~ST_BREAK; @@ -1202,11 +1201,11 @@ static inline void sx_check_modem_signals(struct sx_port *port) hi_state &= ~ST_DCD; sx_dprintk(SX_DEBUG_MODEMSIGNALS, "got a DCD change.\n"); sx_write_channel_byte(port, hi_state, hi_state); - c_dcd = sx_get_CD(port); + c_dcd = tty_port_carrier_raised(&port->gs.port); sx_dprintk(SX_DEBUG_MODEMSIGNALS, "DCD is now %d\n", c_dcd); if (c_dcd != port->c_dcd) { port->c_dcd = c_dcd; - if (sx_get_CD(port)) { + if (tty_port_carrier_raised(&port->gs.port)) { /* DCD went UP */ if ((sx_read_channel_byte(port, hi_hstat) != HS_IDLE_CLOSED) && @@ -1415,13 +1414,10 @@ static void sx_enable_rx_interrupts(void *ptr) } /* Jeez. Isn't this simple? */ -static int sx_get_CD(void *ptr) +static int sx_carrier_raised(struct tty_port *port) { - struct sx_port *port = ptr; - func_enter2(); - - func_exit(); - return ((sx_read_channel_byte(port, hi_ip) & IP_DCD) != 0); + struct sx_port *sp = container_of(port, struct sx_port, gs.port); + return ((sx_read_channel_byte(sp, hi_ip) & IP_DCD) != 0); } /* Jeez. Isn't this simple? */ @@ -1536,7 +1532,7 @@ static int sx_open(struct tty_struct *tty, struct file *filp) } /* tty->low_latency = 1; */ - port->c_dcd = sx_get_CD(port); + port->c_dcd = sx_carrier_raised(&port->gs.port); sx_dprintk(SX_DEBUG_OPEN, "at open: cd=%d\n", port->c_dcd); func_exit(); @@ -2354,6 +2350,10 @@ static const struct tty_operations sx_ops = { .tiocmset = sx_tiocmset, }; +static const struct tty_port_operations sx_port_ops = { + .carrier_raised = sx_carrier_raised, +}; + static int sx_init_drivers(void) { int error; @@ -2410,6 +2410,7 @@ static int sx_init_portstructs(int nboards, int nports) for (j = 0; j < boards[i].nports; j++) { sx_dprintk(SX_DEBUG_INIT, "initing port %d\n", j); tty_port_init(&port->gs.port); + port->gs.port.ops = &sx_port_ops; port->gs.magic = SX_MAGIC; port->gs.close_delay = HZ / 2; port->gs.closing_wait = 30 * HZ; diff --git a/drivers/char/synclink.c b/drivers/char/synclink.c index 500f5176b6ba..fb2e6b5e0ef1 100644 --- a/drivers/char/synclink.c +++ b/drivers/char/synclink.c @@ -3281,6 +3281,23 @@ static void mgsl_hangup(struct tty_struct *tty) } /* end of mgsl_hangup() */ +/* + * carrier_raised() + * + * Return true if carrier is raised + */ + +static int carrier_raised(struct tty_port *port) +{ + unsigned long flags; + struct mgsl_struct *info = container_of(port, struct mgsl_struct, port); + + spin_lock_irqsave(&info->irq_spinlock, flags); + usc_get_serial_signals(info); + spin_unlock_irqrestore(&info->irq_spinlock, flags); + return (info->serial_signals & SerialSignal_DCD) ? 1 : 0; +} + /* block_til_ready() * * Block the current process until the specified port @@ -3302,6 +3319,8 @@ static int block_til_ready(struct tty_struct *tty, struct file * filp, bool do_clocal = false; bool extra_count = false; unsigned long flags; + int dcd; + struct tty_port *port = &info->port; if (debug_level >= DEBUG_LEVEL_INFO) printk("%s(%d):block_til_ready on %s\n", @@ -3309,7 +3328,7 @@ static int block_til_ready(struct tty_struct *tty, struct file * filp, if (filp->f_flags & O_NONBLOCK || tty->flags & (1 << TTY_IO_ERROR)){ /* nonblock mode is set or port is not enabled */ - info->port.flags |= ASYNC_NORMAL_ACTIVE; + port->flags |= ASYNC_NORMAL_ACTIVE; return 0; } @@ -3318,25 +3337,25 @@ static int block_til_ready(struct tty_struct *tty, struct file * filp, /* Wait for carrier detect and the line to become * free (i.e., not in use by the callout). While we are in - * this loop, info->port.count is dropped by one, so that + * this loop, port->count is dropped by one, so that * mgsl_close() knows when to free things. We restore it upon * exit, either normal or abnormal. */ retval = 0; - add_wait_queue(&info->port.open_wait, &wait); + add_wait_queue(&port->open_wait, &wait); if (debug_level >= DEBUG_LEVEL_INFO) printk("%s(%d):block_til_ready before block on %s count=%d\n", - __FILE__,__LINE__, tty->driver->name, info->port.count ); + __FILE__,__LINE__, tty->driver->name, port->count ); spin_lock_irqsave(&info->irq_spinlock, flags); if (!tty_hung_up_p(filp)) { extra_count = true; - info->port.count--; + port->count--; } spin_unlock_irqrestore(&info->irq_spinlock, flags); - info->port.blocked_open++; + port->blocked_open++; while (1) { if (tty->termios->c_cflag & CBAUD) { @@ -3348,20 +3367,16 @@ static int block_til_ready(struct tty_struct *tty, struct file * filp, set_current_state(TASK_INTERRUPTIBLE); - if (tty_hung_up_p(filp) || !(info->port.flags & ASYNC_INITIALIZED)){ - retval = (info->port.flags & ASYNC_HUP_NOTIFY) ? + if (tty_hung_up_p(filp) || !(port->flags & ASYNC_INITIALIZED)){ + retval = (port->flags & ASYNC_HUP_NOTIFY) ? -EAGAIN : -ERESTARTSYS; break; } - spin_lock_irqsave(&info->irq_spinlock,flags); - usc_get_serial_signals(info); - spin_unlock_irqrestore(&info->irq_spinlock,flags); + dcd = tty_port_carrier_raised(&info->port); - if (!(info->port.flags & ASYNC_CLOSING) && - (do_clocal || (info->serial_signals & SerialSignal_DCD)) ) { + if (!(port->flags & ASYNC_CLOSING) && (do_clocal || dcd)) break; - } if (signal_pending(current)) { retval = -ERESTARTSYS; @@ -3370,24 +3385,24 @@ static int block_til_ready(struct tty_struct *tty, struct file * filp, if (debug_level >= DEBUG_LEVEL_INFO) printk("%s(%d):block_til_ready blocking on %s count=%d\n", - __FILE__,__LINE__, tty->driver->name, info->port.count ); + __FILE__,__LINE__, tty->driver->name, port->count ); schedule(); } set_current_state(TASK_RUNNING); - remove_wait_queue(&info->port.open_wait, &wait); + remove_wait_queue(&port->open_wait, &wait); if (extra_count) - info->port.count++; - info->port.blocked_open--; + port->count++; + port->blocked_open--; if (debug_level >= DEBUG_LEVEL_INFO) printk("%s(%d):block_til_ready after blocking on %s count=%d\n", - __FILE__,__LINE__, tty->driver->name, info->port.count ); + __FILE__,__LINE__, tty->driver->name, port->count ); if (!retval) - info->port.flags |= ASYNC_NORMAL_ACTIVE; + port->flags |= ASYNC_NORMAL_ACTIVE; return retval; @@ -4304,6 +4319,11 @@ static void mgsl_add_device( struct mgsl_struct *info ) } /* end of mgsl_add_device() */ +static const struct tty_port_operations mgsl_port_ops = { + .carrier_raised = carrier_raised, +}; + + /* mgsl_allocate_device() * * Allocate and initialize a device instance structure @@ -4322,6 +4342,7 @@ static struct mgsl_struct* mgsl_allocate_device(void) printk("Error can't allocate device instance data\n"); } else { tty_port_init(&info->port); + info->port.ops = &mgsl_port_ops; info->magic = MGSL_MAGIC; INIT_WORK(&info->task, mgsl_bh_handler); info->max_frame_size = 4096; diff --git a/drivers/char/synclink_gt.c b/drivers/char/synclink_gt.c index 08911ed66494..39ccaba8ca37 100644 --- a/drivers/char/synclink_gt.c +++ b/drivers/char/synclink_gt.c @@ -3132,6 +3132,17 @@ static int tiocmset(struct tty_struct *tty, struct file *file, return 0; } +static int carrier_raised(struct tty_port *port) +{ + unsigned long flags; + struct slgt_info *info = container_of(port, struct slgt_info, port); + + spin_lock_irqsave(&info->lock,flags); + get_signals(info); + spin_unlock_irqrestore(&info->lock,flags); + return (info->signals & SerialSignal_DCD) ? 1 : 0; +} + /* * block current process until the device is ready to open */ @@ -3143,12 +3154,14 @@ static int block_til_ready(struct tty_struct *tty, struct file *filp, bool do_clocal = false; bool extra_count = false; unsigned long flags; + int cd; + struct tty_port *port = &info->port; DBGINFO(("%s block_til_ready\n", tty->driver->name)); if (filp->f_flags & O_NONBLOCK || tty->flags & (1 << TTY_IO_ERROR)){ /* nonblock mode is set or port is not enabled */ - info->port.flags |= ASYNC_NORMAL_ACTIVE; + port->flags |= ASYNC_NORMAL_ACTIVE; return 0; } @@ -3157,21 +3170,21 @@ static int block_til_ready(struct tty_struct *tty, struct file *filp, /* Wait for carrier detect and the line to become * free (i.e., not in use by the callout). While we are in - * this loop, info->port.count is dropped by one, so that + * this loop, port->count is dropped by one, so that * close() knows when to free things. We restore it upon * exit, either normal or abnormal. */ retval = 0; - add_wait_queue(&info->port.open_wait, &wait); + add_wait_queue(&port->open_wait, &wait); spin_lock_irqsave(&info->lock, flags); if (!tty_hung_up_p(filp)) { extra_count = true; - info->port.count--; + port->count--; } spin_unlock_irqrestore(&info->lock, flags); - info->port.blocked_open++; + port->blocked_open++; while (1) { if ((tty->termios->c_cflag & CBAUD)) { @@ -3183,20 +3196,16 @@ static int block_til_ready(struct tty_struct *tty, struct file *filp, set_current_state(TASK_INTERRUPTIBLE); - if (tty_hung_up_p(filp) || !(info->port.flags & ASYNC_INITIALIZED)){ - retval = (info->port.flags & ASYNC_HUP_NOTIFY) ? + if (tty_hung_up_p(filp) || !(port->flags & ASYNC_INITIALIZED)){ + retval = (port->flags & ASYNC_HUP_NOTIFY) ? -EAGAIN : -ERESTARTSYS; break; } - spin_lock_irqsave(&info->lock,flags); - get_signals(info); - spin_unlock_irqrestore(&info->lock,flags); + cd = tty_port_carrier_raised(port); - if (!(info->port.flags & ASYNC_CLOSING) && - (do_clocal || (info->signals & SerialSignal_DCD)) ) { + if (!(port->flags & ASYNC_CLOSING) && (do_clocal || cd )) break; - } if (signal_pending(current)) { retval = -ERESTARTSYS; @@ -3208,14 +3217,14 @@ static int block_til_ready(struct tty_struct *tty, struct file *filp, } set_current_state(TASK_RUNNING); - remove_wait_queue(&info->port.open_wait, &wait); + remove_wait_queue(&port->open_wait, &wait); if (extra_count) - info->port.count++; - info->port.blocked_open--; + port->count++; + port->blocked_open--; if (!retval) - info->port.flags |= ASYNC_NORMAL_ACTIVE; + port->flags |= ASYNC_NORMAL_ACTIVE; DBGINFO(("%s block_til_ready ready, rc=%d\n", tty->driver->name, retval)); return retval; @@ -3444,6 +3453,10 @@ static void add_device(struct slgt_info *info) #endif } +static const struct tty_port_operations slgt_port_ops = { + .carrier_raised = carrier_raised, +}; + /* * allocate device instance structure, return NULL on failure */ @@ -3458,6 +3471,7 @@ static struct slgt_info *alloc_dev(int adapter_num, int port_num, struct pci_dev driver_name, adapter_num, port_num)); } else { tty_port_init(&info->port); + info->port.ops = &slgt_port_ops; info->magic = MGSL_MAGIC; INIT_WORK(&info->task, bh_handler); info->max_frame_size = 4096; diff --git a/drivers/char/synclinkmp.c b/drivers/char/synclinkmp.c index 6bdb44f7bec2..fcf1ec77450d 100644 --- a/drivers/char/synclinkmp.c +++ b/drivers/char/synclinkmp.c @@ -558,6 +558,7 @@ static void release_resources(SLMP_INFO *info); static int startup(SLMP_INFO *info); static int block_til_ready(struct tty_struct *tty, struct file * filp,SLMP_INFO *info); +static int carrier_raised(struct tty_port *port); static void shutdown(SLMP_INFO *info); static void program_hw(SLMP_INFO *info); static void change_params(SLMP_INFO *info); @@ -3318,7 +3319,17 @@ static int tiocmset(struct tty_struct *tty, struct file *file, return 0; } +static int carrier_raised(struct tty_port *port) +{ + SLMP_INFO *info = container_of(port, SLMP_INFO, port); + unsigned long flags; + spin_lock_irqsave(&info->lock,flags); + get_signals(info); + spin_unlock_irqrestore(&info->lock,flags); + + return (info->serial_signals & SerialSignal_DCD) ? 1 : 0; +} /* Block the current process until the specified port is ready to open. */ @@ -3330,6 +3341,8 @@ static int block_til_ready(struct tty_struct *tty, struct file *filp, bool do_clocal = false; bool extra_count = false; unsigned long flags; + int cd; + struct tty_port *port = &info->port; if (debug_level >= DEBUG_LEVEL_INFO) printk("%s(%d):%s block_til_ready()\n", @@ -3338,7 +3351,7 @@ static int block_til_ready(struct tty_struct *tty, struct file *filp, if (filp->f_flags & O_NONBLOCK || tty->flags & (1 << TTY_IO_ERROR)){ /* nonblock mode is set or port is not enabled */ /* just verify that callout device is not active */ - info->port.flags |= ASYNC_NORMAL_ACTIVE; + port->flags |= ASYNC_NORMAL_ACTIVE; return 0; } @@ -3347,25 +3360,25 @@ static int block_til_ready(struct tty_struct *tty, struct file *filp, /* Wait for carrier detect and the line to become * free (i.e., not in use by the callout). While we are in - * this loop, info->port.count is dropped by one, so that + * this loop, port->count is dropped by one, so that * close() knows when to free things. We restore it upon * exit, either normal or abnormal. */ retval = 0; - add_wait_queue(&info->port.open_wait, &wait); + add_wait_queue(&port->open_wait, &wait); if (debug_level >= DEBUG_LEVEL_INFO) printk("%s(%d):%s block_til_ready() before block, count=%d\n", - __FILE__,__LINE__, tty->driver->name, info->port.count ); + __FILE__,__LINE__, tty->driver->name, port->count ); spin_lock_irqsave(&info->lock, flags); if (!tty_hung_up_p(filp)) { extra_count = true; - info->port.count--; + port->count--; } spin_unlock_irqrestore(&info->lock, flags); - info->port.blocked_open++; + port->blocked_open++; while (1) { if ((tty->termios->c_cflag & CBAUD)) { @@ -3377,20 +3390,16 @@ static int block_til_ready(struct tty_struct *tty, struct file *filp, set_current_state(TASK_INTERRUPTIBLE); - if (tty_hung_up_p(filp) || !(info->port.flags & ASYNC_INITIALIZED)){ - retval = (info->port.flags & ASYNC_HUP_NOTIFY) ? + if (tty_hung_up_p(filp) || !(port->flags & ASYNC_INITIALIZED)){ + retval = (port->flags & ASYNC_HUP_NOTIFY) ? -EAGAIN : -ERESTARTSYS; break; } - spin_lock_irqsave(&info->lock,flags); - get_signals(info); - spin_unlock_irqrestore(&info->lock,flags); + cd = tty_port_carrier_raised(port); - if (!(info->port.flags & ASYNC_CLOSING) && - (do_clocal || (info->serial_signals & SerialSignal_DCD)) ) { + if (!(port->flags & ASYNC_CLOSING) && (do_clocal || cd)) break; - } if (signal_pending(current)) { retval = -ERESTARTSYS; @@ -3399,24 +3408,24 @@ static int block_til_ready(struct tty_struct *tty, struct file *filp, if (debug_level >= DEBUG_LEVEL_INFO) printk("%s(%d):%s block_til_ready() count=%d\n", - __FILE__,__LINE__, tty->driver->name, info->port.count ); + __FILE__,__LINE__, tty->driver->name, port->count ); schedule(); } set_current_state(TASK_RUNNING); - remove_wait_queue(&info->port.open_wait, &wait); + remove_wait_queue(&port->open_wait, &wait); if (extra_count) - info->port.count++; - info->port.blocked_open--; + port->count++; + port->blocked_open--; if (debug_level >= DEBUG_LEVEL_INFO) printk("%s(%d):%s block_til_ready() after, count=%d\n", - __FILE__,__LINE__, tty->driver->name, info->port.count ); + __FILE__,__LINE__, tty->driver->name, port->count ); if (!retval) - info->port.flags |= ASYNC_NORMAL_ACTIVE; + port->flags |= ASYNC_NORMAL_ACTIVE; return retval; } @@ -3782,6 +3791,10 @@ static void add_device(SLMP_INFO *info) #endif } +static const struct tty_port_operations port_ops = { + .carrier_raised = carrier_raised, +}; + /* Allocate and initialize a device instance structure * * Return Value: pointer to SLMP_INFO if success, otherwise NULL @@ -3798,6 +3811,7 @@ static SLMP_INFO *alloc_dev(int adapter_num, int port_num, struct pci_dev *pdev) __FILE__,__LINE__, adapter_num, port_num); } else { tty_port_init(&info->port); + info->port.ops = &port_ops; info->magic = MGSL_MAGIC; INIT_WORK(&info->task, bh_handler); info->max_frame_size = 4096; @@ -3940,6 +3954,7 @@ static const struct tty_operations ops = { .tiocmset = tiocmset, }; + static void synclinkmp_cleanup(void) { int rc; diff --git a/drivers/char/tty_port.c b/drivers/char/tty_port.c index c8f8024cb40e..f54e40cbf023 100644 --- a/drivers/char/tty_port.c +++ b/drivers/char/tty_port.c @@ -94,3 +94,20 @@ void tty_port_tty_set(struct tty_port *port, struct tty_struct *tty) spin_unlock_irqrestore(&port->lock, flags); } EXPORT_SYMBOL(tty_port_tty_set); + +/** + * tty_port_carrier_raised - carrier raised check + * @port: tty port + * + * Wrapper for the carrier detect logic. For the moment this is used + * to hide some internal details. This will eventually become entirely + * internal to the tty port. + */ + +int tty_port_carrier_raised(struct tty_port *port) +{ + if (port->ops->carrier_raised == NULL) + return 1; + return port->ops->carrier_raised(port); +} +EXPORT_SYMBOL(tty_port_carrier_raised); diff --git a/drivers/char/vme_scc.c b/drivers/char/vme_scc.c index 1718b3c481db..d4e1534c0e03 100644 --- a/drivers/char/vme_scc.c +++ b/drivers/char/vme_scc.c @@ -69,7 +69,7 @@ static void scc_disable_tx_interrupts(void * ptr); static void scc_enable_tx_interrupts(void * ptr); static void scc_disable_rx_interrupts(void * ptr); static void scc_enable_rx_interrupts(void * ptr); -static int scc_get_CD(void * ptr); +static int scc_carrier_raised(struct tty_port *port); static void scc_shutdown_port(void * ptr); static int scc_set_real_termios(void *ptr); static void scc_hungup(void *ptr); @@ -100,7 +100,6 @@ static struct real_driver scc_real_driver = { scc_enable_tx_interrupts, scc_disable_rx_interrupts, scc_enable_rx_interrupts, - scc_get_CD, scc_shutdown_port, scc_set_real_termios, scc_chars_in_buffer, @@ -129,6 +128,10 @@ static const struct tty_operations scc_ops = { .break_ctl = scc_break_ctl, }; +static const struct tty_port_operations scc_port_ops = { + .carrier_raised = scc_carrier_raised, +}; + /*---------------------------------------------------------------------------- * vme_scc_init() and support functions *---------------------------------------------------------------------------*/ @@ -176,6 +179,8 @@ static void scc_init_portstructs(void) for (i = 0; i < 2; i++) { port = scc_ports + i; + tty_port_init(&port->gs.port); + port->gs.port.ops = &scc_port_ops; port->gs.magic = SCC_MAGIC; port->gs.close_delay = HZ/2; port->gs.closing_wait = 30 * HZ; @@ -624,9 +629,9 @@ static void scc_enable_rx_interrupts(void *ptr) } -static int scc_get_CD(void *ptr) +static int scc_carrier_raised(struct tty_port *port) { - struct scc_port *port = ptr; + struct scc_port *scc = container_of(port, struct scc_port, gs.port); unsigned channel = port->channel; return !!(scc_last_status_reg[channel] & SR_DCD); @@ -896,7 +901,7 @@ static int scc_open (struct tty_struct * tty, struct file * filp) return retval; } - port->c_dcd = scc_get_CD (port); + port->c_dcd = tty_port_carrier_raised(&port->gs.port); scc_enable_rx_interrupts(port); diff --git a/include/linux/generic_serial.h b/include/linux/generic_serial.h index 4cc913939817..fadff28505bb 100644 --- a/include/linux/generic_serial.h +++ b/include/linux/generic_serial.h @@ -21,7 +21,6 @@ struct real_driver { void (*enable_tx_interrupts) (void *); void (*disable_rx_interrupts) (void *); void (*enable_rx_interrupts) (void *); - int (*get_CD) (void *); void (*shutdown_port) (void*); int (*set_real_termios) (void*); int (*chars_in_buffer) (void*); diff --git a/include/linux/tty.h b/include/linux/tty.h index bbbeaef99626..bc7bae78e22f 100644 --- a/include/linux/tty.h +++ b/include/linux/tty.h @@ -180,8 +180,16 @@ struct signal_struct; * until a hangup so don't use the wrong path. */ +struct tty_port; + +struct tty_port_operations { + /* Return 1 if the carrier is raised */ + int (*carrier_raised)(struct tty_port *port); +}; + struct tty_port { struct tty_struct *tty; /* Back pointer */ + const struct tty_port_operations *ops; /* Port operations */ spinlock_t lock; /* Lock protecting tty field */ int blocked_open; /* Waiting to open */ int count; /* Usage count */ @@ -427,6 +435,7 @@ extern int tty_port_alloc_xmit_buf(struct tty_port *port); extern void tty_port_free_xmit_buf(struct tty_port *port); extern struct tty_struct *tty_port_tty_get(struct tty_port *port); extern void tty_port_tty_set(struct tty_port *port, struct tty_struct *tty); +extern int tty_port_carrier_raised(struct tty_port *port); extern int tty_register_ldisc(int disc, struct tty_ldisc_ops *new_ldisc); extern int tty_unregister_ldisc(int disc);