diff options
Diffstat (limited to 'drivers/tty')
46 files changed, 647 insertions, 1224 deletions
diff --git a/drivers/tty/amiserial.c b/drivers/tty/amiserial.c index 2b86f8e0fb58..979e7c3ea2cb 100644 --- a/drivers/tty/amiserial.c +++ b/drivers/tty/amiserial.c @@ -1248,6 +1248,8 @@ static int rs_ioctl(struct tty_struct *tty, struct async_icount cprev, cnow; /* kernel counter temps */ void __user *argp = (void __user *)arg; unsigned long flags; + DEFINE_WAIT(wait); + int ret; if (serial_paranoia_check(info, tty->name, "rs_ioctl")) return -ENODEV; @@ -1288,25 +1290,33 @@ static int rs_ioctl(struct tty_struct *tty, cprev = info->icount; local_irq_restore(flags); while (1) { - interruptible_sleep_on(&info->tport.delta_msr_wait); - /* see if a signal did it */ - if (signal_pending(current)) - return -ERESTARTSYS; + prepare_to_wait(&info->tport.delta_msr_wait, + &wait, TASK_INTERRUPTIBLE); local_irq_save(flags); cnow = info->icount; /* atomic copy */ local_irq_restore(flags); if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr && - cnow.dcd == cprev.dcd && cnow.cts == cprev.cts) - return -EIO; /* no change => error */ + cnow.dcd == cprev.dcd && cnow.cts == cprev.cts) { + ret = -EIO; /* no change => error */ + break; + } if ( ((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) || ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) || ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) || ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts)) ) { - return 0; + ret = 0; + break; + } + schedule(); + /* see if a signal did it */ + if (signal_pending(current)) { + ret = -ERESTARTSYS; + break; } cprev = cnow; } - /* NOTREACHED */ + finish_wait(&info->tport.delta_msr_wait, &wait); + return ret; case TIOCSERGWILD: case TIOCSERSWILD: @@ -1855,6 +1865,9 @@ static struct console sercons = { */ static int __init amiserial_console_init(void) { + if (!MACH_IS_AMIGA) + return -ENODEV; + register_console(&sercons); return 0; } diff --git a/drivers/tty/cyclades.c b/drivers/tty/cyclades.c index 33f83fee9fae..a57bb5ab761c 100644 --- a/drivers/tty/cyclades.c +++ b/drivers/tty/cyclades.c @@ -2709,6 +2709,8 @@ cy_ioctl(struct tty_struct *tty, break; #ifndef CONFIG_CYZ_INTR case CYZSETPOLLCYCLE: + if (arg > LONG_MAX / HZ) + return -ENODEV; cyz_polling_cycle = (arg * HZ) / 1000; break; case CYZGETPOLLCYCLE: diff --git a/drivers/tty/goldfish.c b/drivers/tty/goldfish.c index f17d2e4ee2ca..75dc9d25f326 100644 --- a/drivers/tty/goldfish.c +++ b/drivers/tty/goldfish.c @@ -14,7 +14,6 @@ */ #include <linux/console.h> -#include <linux/init.h> #include <linux/interrupt.h> #include <linux/platform_device.h> #include <linux/tty.h> diff --git a/drivers/tty/hvc/hvc_console.c b/drivers/tty/hvc/hvc_console.c index 9eba119bcdd3..50b46881b6ca 100644 --- a/drivers/tty/hvc/hvc_console.c +++ b/drivers/tty/hvc/hvc_console.c @@ -788,7 +788,7 @@ static int hvc_tiocmset(struct tty_struct *tty, } #ifdef CONFIG_CONSOLE_POLL -int hvc_poll_init(struct tty_driver *driver, int line, char *options) +static int hvc_poll_init(struct tty_driver *driver, int line, char *options) { return 0; } diff --git a/drivers/tty/hvc/hvsi_lib.c b/drivers/tty/hvc/hvsi_lib.c index 347050ea414a..7ae6c293e518 100644 --- a/drivers/tty/hvc/hvsi_lib.c +++ b/drivers/tty/hvc/hvsi_lib.c @@ -1,5 +1,4 @@ #include <linux/types.h> -#include <linux/init.h> #include <linux/delay.h> #include <linux/slab.h> #include <linux/console.h> diff --git a/drivers/tty/ipwireless/tty.c b/drivers/tty/ipwireless/tty.c index 8fd72ff9436e..ebd5bff0f5c1 100644 --- a/drivers/tty/ipwireless/tty.c +++ b/drivers/tty/ipwireless/tty.c @@ -15,7 +15,6 @@ * Copyright (C) 2007 David Sterba */ -#include <linux/init.h> #include <linux/kernel.h> #include <linux/module.h> #include <linux/mutex.h> diff --git a/drivers/tty/n_gsm.c b/drivers/tty/n_gsm.c index c0f76da55304..f34461c5f14e 100644 --- a/drivers/tty/n_gsm.c +++ b/drivers/tty/n_gsm.c @@ -194,6 +194,7 @@ struct gsm_control { struct gsm_mux { struct tty_struct *tty; /* The tty our ldisc is bound to */ spinlock_t lock; + struct mutex mutex; unsigned int num; struct kref ref; @@ -1704,11 +1705,8 @@ static void gsm_dlci_release(struct gsm_dlci *dlci) gsm_destroy_network(dlci); mutex_unlock(&dlci->mutex); - /* tty_vhangup needs the tty_lock, so unlock and - relock after doing the hangup. */ - tty_unlock(tty); tty_vhangup(tty); - tty_lock(tty); + tty_port_tty_set(&dlci->port, NULL); tty_kref_put(tty); } @@ -2019,7 +2017,7 @@ static void gsm_error(struct gsm_mux *gsm, * and then shut down each device hanging up the channels as we go. */ -void gsm_cleanup_mux(struct gsm_mux *gsm) +static void gsm_cleanup_mux(struct gsm_mux *gsm) { int i; struct gsm_dlci *dlci = gsm->dlci[0]; @@ -2054,15 +2052,16 @@ void gsm_cleanup_mux(struct gsm_mux *gsm) dlci->state == DLCI_CLOSED); } /* Free up any link layer users */ + mutex_lock(&gsm->mutex); for (i = 0; i < NUM_DLCI; i++) if (gsm->dlci[i]) gsm_dlci_release(gsm->dlci[i]); + mutex_unlock(&gsm->mutex); /* Now wipe the queues */ list_for_each_entry_safe(txq, ntxq, &gsm->tx_list, list) kfree(txq); INIT_LIST_HEAD(&gsm->tx_list); } -EXPORT_SYMBOL_GPL(gsm_cleanup_mux); /** * gsm_activate_mux - generic GSM setup @@ -2073,7 +2072,7 @@ EXPORT_SYMBOL_GPL(gsm_cleanup_mux); * finally kick off connecting to DLCI 0 on the modem. */ -int gsm_activate_mux(struct gsm_mux *gsm) +static int gsm_activate_mux(struct gsm_mux *gsm) { struct gsm_dlci *dlci; int i = 0; @@ -2109,7 +2108,6 @@ int gsm_activate_mux(struct gsm_mux *gsm) gsm->dead = 0; /* Tty opens are now permissible */ return 0; } -EXPORT_SYMBOL_GPL(gsm_activate_mux); /** * gsm_free_mux - free up a mux @@ -2117,13 +2115,12 @@ EXPORT_SYMBOL_GPL(gsm_activate_mux); * * Dispose of allocated resources for a dead mux */ -void gsm_free_mux(struct gsm_mux *gsm) +static void gsm_free_mux(struct gsm_mux *gsm) { kfree(gsm->txframe); kfree(gsm->buf); kfree(gsm); } -EXPORT_SYMBOL_GPL(gsm_free_mux); /** * gsm_free_muxr - free up a mux @@ -2153,7 +2150,7 @@ static inline void mux_put(struct gsm_mux *gsm) * Creates a new mux ready for activation. */ -struct gsm_mux *gsm_alloc_mux(void) +static struct gsm_mux *gsm_alloc_mux(void) { struct gsm_mux *gsm = kzalloc(sizeof(struct gsm_mux), GFP_KERNEL); if (gsm == NULL) @@ -2170,6 +2167,7 @@ struct gsm_mux *gsm_alloc_mux(void) return NULL; } spin_lock_init(&gsm->lock); + mutex_init(&gsm->mutex); kref_init(&gsm->ref); INIT_LIST_HEAD(&gsm->tx_list); @@ -2185,7 +2183,6 @@ struct gsm_mux *gsm_alloc_mux(void) return gsm; } -EXPORT_SYMBOL_GPL(gsm_alloc_mux); /** * gsmld_output - write to link @@ -2269,14 +2266,15 @@ static void gsmld_receive_buf(struct tty_struct *tty, const unsigned char *cp, char *f; int i; char buf[64]; - char flags; + char flags = TTY_NORMAL; if (debug & 4) print_hex_dump_bytes("gsmld_receive: ", DUMP_PREFIX_OFFSET, cp, count); for (i = count, dp = cp, f = fp; i; i--, dp++) { - flags = *f++; + if (f) + flags = *f++; switch (flags) { case TTY_NORMAL: gsm->receive(gsm, *dp); @@ -2711,7 +2709,7 @@ static void gsm_mux_rx_netchar(struct gsm_dlci *dlci, return; } -int gsm_change_mtu(struct net_device *net, int new_mtu) +static int gsm_change_mtu(struct net_device *net, int new_mtu) { struct gsm_mux_net *mux_net = (struct gsm_mux_net *)netdev_priv(net); if ((new_mtu < 8) || (new_mtu > mux_net->dlci->gsm->mtu)) @@ -2909,23 +2907,33 @@ static int gsmtty_install(struct tty_driver *driver, struct tty_struct *tty) This is ok from a locking perspective as we don't have to worry about this if DLCI0 is lost */ - if (gsm->dlci[0] && gsm->dlci[0]->state != DLCI_OPEN) + mutex_lock(&gsm->mutex); + if (gsm->dlci[0] && gsm->dlci[0]->state != DLCI_OPEN) { + mutex_unlock(&gsm->mutex); return -EL2NSYNC; + } dlci = gsm->dlci[line]; if (dlci == NULL) { alloc = true; dlci = gsm_dlci_alloc(gsm, line); } - if (dlci == NULL) + if (dlci == NULL) { + mutex_unlock(&gsm->mutex); return -ENOMEM; + } ret = tty_port_install(&dlci->port, driver, tty); if (ret) { if (alloc) dlci_put(dlci); + mutex_unlock(&gsm->mutex); return ret; } + dlci_get(dlci); + dlci_get(gsm->dlci[0]); + mux_get(gsm); tty->driver_data = dlci; + mutex_unlock(&gsm->mutex); return 0; } @@ -2936,9 +2944,6 @@ static int gsmtty_open(struct tty_struct *tty, struct file *filp) struct tty_port *port = &dlci->port; port->count++; - dlci_get(dlci); - dlci_get(dlci->gsm->dlci[0]); - mux_get(dlci->gsm); tty_port_tty_set(port, tty); dlci->modem_rx = 0; @@ -2965,7 +2970,7 @@ static void gsmtty_close(struct tty_struct *tty, struct file *filp) mutex_unlock(&dlci->mutex); gsm = dlci->gsm; if (tty_port_close_start(&dlci->port, tty, filp) == 0) - goto out; + return; gsm_dlci_begin_close(dlci); if (test_bit(ASYNCB_INITIALIZED, &dlci->port.flags)) { if (C_HUPCL(tty)) @@ -2973,10 +2978,7 @@ static void gsmtty_close(struct tty_struct *tty, struct file *filp) } tty_port_close_end(&dlci->port, tty); tty_port_tty_set(&dlci->port, NULL); -out: - dlci_put(dlci); - dlci_put(gsm->dlci[0]); - mux_put(gsm); + return; } static void gsmtty_hangup(struct tty_struct *tty) @@ -3153,6 +3155,16 @@ static int gsmtty_break_ctl(struct tty_struct *tty, int state) return gsmtty_modem_update(dlci, encode); } +static void gsmtty_remove(struct tty_driver *driver, struct tty_struct *tty) +{ + struct gsm_dlci *dlci = tty->driver_data; + struct gsm_mux *gsm = dlci->gsm; + + dlci_put(dlci); + dlci_put(gsm->dlci[0]); + mux_put(gsm); + driver->ttys[tty->index] = NULL; +} /* Virtual ttys for the demux */ static const struct tty_operations gsmtty_ops = { @@ -3172,6 +3184,7 @@ static const struct tty_operations gsmtty_ops = { .tiocmget = gsmtty_tiocmget, .tiocmset = gsmtty_tiocmset, .break_ctl = gsmtty_break_ctl, + .remove = gsmtty_remove, }; diff --git a/drivers/tty/n_r3964.c b/drivers/tty/n_r3964.c index 1e6405070ce6..8b157d68a03e 100644 --- a/drivers/tty/n_r3964.c +++ b/drivers/tty/n_r3964.c @@ -1244,7 +1244,7 @@ static void r3964_receive_buf(struct tty_struct *tty, const unsigned char *cp, { struct r3964_info *pInfo = tty->disc_data; const unsigned char *p; - char *f, flags = 0; + char *f, flags = TTY_NORMAL; int i; for (i = count, p = cp, f = fp; i; i--, p++) { diff --git a/drivers/tty/n_tty.c b/drivers/tty/n_tty.c index 7cdd1eb9406c..cb8017aa4434 100644 --- a/drivers/tty/n_tty.c +++ b/drivers/tty/n_tty.c @@ -93,6 +93,7 @@ struct n_tty_data { size_t canon_head; size_t echo_head; size_t echo_commit; + size_t echo_mark; DECLARE_BITMAP(char_map, 256); /* private to n_tty_receive_overrun (single-threaded) */ @@ -104,6 +105,7 @@ struct n_tty_data { /* must hold exclusive termios_rwsem to reset these */ unsigned char lnext:1, erasing:1, raw:1, real_raw:1, icanon:1; + unsigned char push:1; /* shared by producer and consumer */ char read_buf[N_TTY_BUF_SIZE]; @@ -274,7 +276,8 @@ static void n_tty_check_unthrottle(struct tty_struct *tty) return; n_tty_set_room(tty); n_tty_write_wakeup(tty->link); - wake_up_interruptible_poll(&tty->link->write_wait, POLLOUT); + if (waitqueue_active(&tty->link->write_wait)) + wake_up_interruptible_poll(&tty->link->write_wait, POLLOUT); return; } @@ -336,10 +339,12 @@ static void reset_buffer_flags(struct n_tty_data *ldata) { ldata->read_head = ldata->canon_head = ldata->read_tail = 0; ldata->echo_head = ldata->echo_tail = ldata->echo_commit = 0; + ldata->echo_mark = 0; ldata->line_start = 0; ldata->erasing = 0; bitmap_zero(ldata->read_flags, N_TTY_BUF_SIZE); + ldata->push = 0; } static void n_tty_packet_mode_flush(struct tty_struct *tty) @@ -349,7 +354,8 @@ static void n_tty_packet_mode_flush(struct tty_struct *tty) spin_lock_irqsave(&tty->ctrl_lock, flags); if (tty->link->packet) { tty->ctrl_status |= TIOCPKT_FLUSHREAD; - wake_up_interruptible(&tty->link->read_wait); + if (waitqueue_active(&tty->link->read_wait)) + wake_up_interruptible(&tty->link->read_wait); } spin_unlock_irqrestore(&tty->ctrl_lock, flags); } @@ -768,7 +774,7 @@ static size_t __process_echoes(struct tty_struct *tty) * data at the tail to prevent a subsequent overrun */ while (ldata->echo_commit - tail >= ECHO_DISCARD_WATERMARK) { if (echo_buf(ldata, tail) == ECHO_OP_START) { - if (echo_buf(ldata, tail) == ECHO_OP_ERASE_TAB) + if (echo_buf(ldata, tail + 1) == ECHO_OP_ERASE_TAB) tail += 3; else tail += 2; @@ -787,6 +793,7 @@ static void commit_echoes(struct tty_struct *tty) size_t head; head = ldata->echo_head; + ldata->echo_mark = head; old = ldata->echo_commit - ldata->echo_tail; /* Process committed echoes if the accumulated # of bytes @@ -810,10 +817,12 @@ static void process_echoes(struct tty_struct *tty) struct n_tty_data *ldata = tty->disc_data; size_t echoed; - if (!L_ECHO(tty) || ldata->echo_commit == ldata->echo_tail) + if ((!L_ECHO(tty) && !L_ECHONL(tty)) || + ldata->echo_mark == ldata->echo_tail) return; mutex_lock(&ldata->output_lock); + ldata->echo_commit = ldata->echo_mark; echoed = __process_echoes(tty); mutex_unlock(&ldata->output_lock); @@ -821,11 +830,13 @@ static void process_echoes(struct tty_struct *tty) tty->ops->flush_chars(tty); } +/* NB: echo_mark and echo_head should be equivalent here */ static void flush_echoes(struct tty_struct *tty) { struct n_tty_data *ldata = tty->disc_data; - if (!L_ECHO(tty) || ldata->echo_commit == ldata->echo_head) + if ((!L_ECHO(tty) && !L_ECHONL(tty)) || + ldata->echo_commit == ldata->echo_head) return; mutex_lock(&ldata->output_lock); @@ -1155,7 +1166,8 @@ static void n_tty_receive_break(struct tty_struct *tty) put_tty_queue('\0', ldata); } put_tty_queue('\0', ldata); - wake_up_interruptible(&tty->read_wait); + if (waitqueue_active(&tty->read_wait)) + wake_up_interruptible(&tty->read_wait); } /** @@ -1213,7 +1225,8 @@ static void n_tty_receive_parity_error(struct tty_struct *tty, unsigned char c) put_tty_queue('\0', ldata); else put_tty_queue(c, ldata); - wake_up_interruptible(&tty->read_wait); + if (waitqueue_active(&tty->read_wait)) + wake_up_interruptible(&tty->read_wait); } static void @@ -1257,7 +1270,6 @@ static int n_tty_receive_char_special(struct tty_struct *tty, unsigned char c) { struct n_tty_data *ldata = tty->disc_data; - int parmrk; if (I_IXON(tty)) { if (c == START_CHAR(tty)) { @@ -1342,8 +1354,6 @@ n_tty_receive_char_special(struct tty_struct *tty, unsigned char c) } if ((c == EOL_CHAR(tty)) || (c == EOL2_CHAR(tty) && L_IEXTEN(tty))) { - parmrk = (c == (unsigned char) '\377' && I_PARMRK(tty)) - ? 1 : 0; /* * XXX are EOL_CHAR and EOL2_CHAR echoed?!? */ @@ -1358,7 +1368,7 @@ n_tty_receive_char_special(struct tty_struct *tty, unsigned char c) * XXX does PARMRK doubling happen for * EOL_CHAR and EOL2_CHAR? */ - if (parmrk) + if (c == (unsigned char) '\377' && I_PARMRK(tty)) put_tty_queue(c, ldata); handle_newline: @@ -1372,7 +1382,6 @@ handle_newline: } } - parmrk = (c == (unsigned char) '\377' && I_PARMRK(tty)) ? 1 : 0; if (L_ECHO(tty)) { finish_erasing(ldata); if (c == '\n') @@ -1386,7 +1395,8 @@ handle_newline: commit_echoes(tty); } - if (parmrk) + /* PARMRK doubling check */ + if (c == (unsigned char) '\377' && I_PARMRK(tty)) put_tty_queue(c, ldata); put_tty_queue(c, ldata); @@ -1397,7 +1407,6 @@ static inline void n_tty_receive_char_inline(struct tty_struct *tty, unsigned char c) { struct n_tty_data *ldata = tty->disc_data; - int parmrk; if (tty->stopped && !tty->flow_stopped && I_IXON(tty) && I_IXANY(tty)) { start_tty(tty); @@ -1411,13 +1420,13 @@ n_tty_receive_char_inline(struct tty_struct *tty, unsigned char c) echo_char(c, tty); commit_echoes(tty); } - parmrk = (c == (unsigned char) '\377' && I_PARMRK(tty)) ? 1 : 0; - if (parmrk) + /* PARMRK doubling check */ + if (c == (unsigned char) '\377' && I_PARMRK(tty)) put_tty_queue(c, ldata); put_tty_queue(c, ldata); } -static inline void n_tty_receive_char(struct tty_struct *tty, unsigned char c) +static void n_tty_receive_char(struct tty_struct *tty, unsigned char c) { n_tty_receive_char_inline(tty, c); } @@ -1442,8 +1451,7 @@ n_tty_receive_char_fast(struct tty_struct *tty, unsigned char c) put_tty_queue(c, ldata); } -static inline void -n_tty_receive_char_closing(struct tty_struct *tty, unsigned char c) +static void n_tty_receive_char_closing(struct tty_struct *tty, unsigned char c) { if (I_ISTRIP(tty)) c &= 0x7f; @@ -1674,32 +1682,9 @@ static void __receive_buf(struct tty_struct *tty, const unsigned char *cp, } } -static void n_tty_receive_buf(struct tty_struct *tty, const unsigned char *cp, - char *fp, int count) -{ - int room, n; - - down_read(&tty->termios_rwsem); - - while (1) { - room = receive_room(tty); - n = min(count, room); - if (!n) - break; - __receive_buf(tty, cp, fp, n); - cp += n; - if (fp) - fp += n; - count -= n; - } - - tty->receive_room = room; - n_tty_check_throttle(tty); - up_read(&tty->termios_rwsem); -} - -static int n_tty_receive_buf2(struct tty_struct *tty, const unsigned char *cp, - char *fp, int count) +static int +n_tty_receive_buf_common(struct tty_struct *tty, const unsigned char *cp, + char *fp, int count, int flow) { struct n_tty_data *ldata = tty->disc_data; int room, n, rcvd = 0; @@ -1710,7 +1695,7 @@ static int n_tty_receive_buf2(struct tty_struct *tty, const unsigned char *cp, room = receive_room(tty); n = min(count, room); if (!n) { - if (!room) + if (flow && !room) ldata->no_room = 1; break; } @@ -1729,6 +1714,18 @@ static int n_tty_receive_buf2(struct tty_struct *tty, const unsigned char *cp, return rcvd; } +static void n_tty_receive_buf(struct tty_struct *tty, const unsigned char *cp, + char *fp, int count) +{ + n_tty_receive_buf_common(tty, cp, fp, count, 0); +} + +static int n_tty_receive_buf2(struct tty_struct *tty, const unsigned char *cp, + char *fp, int count) +{ + return n_tty_receive_buf_common(tty, cp, fp, count, 1); +} + int is_ignored(int sig) { return (sigismember(¤t->blocked, sig) || @@ -1755,7 +1752,16 @@ static void n_tty_set_termios(struct tty_struct *tty, struct ktermios *old) if (!old || (old->c_lflag ^ tty->termios.c_lflag) & ICANON) { bitmap_zero(ldata->read_flags, N_TTY_BUF_SIZE); - ldata->line_start = ldata->canon_head = ldata->read_tail; + ldata->line_start = ldata->read_tail; + if (!L_ICANON(tty) || !read_cnt(ldata)) { + ldata->canon_head = ldata->read_tail; + ldata->push = 0; + } else { + set_bit((ldata->read_head - 1) & (N_TTY_BUF_SIZE - 1), + ldata->read_flags); + ldata->canon_head = ldata->read_head; + ldata->push = 1; + } ldata->erasing = 0; ldata->lnext = 0; } @@ -1818,8 +1824,10 @@ static void n_tty_set_termios(struct tty_struct *tty, struct ktermios *old) start_tty(tty); /* The termios change make the tty ready for I/O */ - wake_up_interruptible(&tty->write_wait); - wake_up_interruptible(&tty->read_wait); + if (waitqueue_active(&tty->write_wait)) + wake_up_interruptible(&tty->write_wait); + if (waitqueue_active(&tty->read_wait)) + wake_up_interruptible(&tty->read_wait); } /** @@ -1885,14 +1893,15 @@ err: return -ENOMEM; } -static inline int input_available_p(struct tty_struct *tty, int amt) +static inline int input_available_p(struct tty_struct *tty, int poll) { struct n_tty_data *ldata = tty->disc_data; + int amt = poll && !TIME_CHAR(tty) ? MIN_CHAR(tty) : 1; if (ldata->icanon && !L_EXTPROC(tty)) { if (ldata->canon_head != ldata->read_tail) return 1; - } else if (read_cnt(ldata) >= (amt ? amt : 1)) + } else if (read_cnt(ldata) >= amt) return 1; return 0; @@ -1958,6 +1967,12 @@ static int copy_from_read_buf(struct tty_struct *tty, * it copies one line of input up to and including the line-delimiting * character into the user-space buffer. * + * NB: When termios is changed from non-canonical to canonical mode and + * the read buffer contains data, n_tty_set_termios() simulates an EOF + * push (as if C-d were input) _without_ the DISABLED_CHAR in the buffer. + * This causes data already processed as input to be immediately available + * as input although a newline has not been received. + * * Called under the atomic_read_lock mutex * * n_tty_read()/consumer path: @@ -1998,10 +2013,13 @@ static int canon_copy_from_read_buf(struct tty_struct *tty, found = 1; size = N_TTY_BUF_SIZE - tail; - n = (found + eol + size) & (N_TTY_BUF_SIZE - 1); + n = eol - tail; + if (n > 4096) + n += 4096; + n += found; c = n; - if (found && read_buf(ldata, eol) == __DISABLED_CHAR) { + if (found && !ldata->push && read_buf(ldata, eol) == __DISABLED_CHAR) { n--; eof_push = !n && ldata->read_tail != ldata->line_start; } @@ -2028,7 +2046,10 @@ static int canon_copy_from_read_buf(struct tty_struct *tty, ldata->read_tail += c; if (found) { - ldata->line_start = ldata->read_tail; + if (!ldata->push) + ldata->line_start = ldata->read_tail; + else + ldata->push = 0; tty_audit_push(tty); } return eof_push ? -EAGAIN : 0; @@ -2243,18 +2264,19 @@ static ssize_t n_tty_read(struct tty_struct *tty, struct file *file, if (time) timeout = time; } - mutex_unlock(&ldata->atomic_read_lock); - remove_wait_queue(&tty->read_wait, &wait); + n_tty_set_room(tty); + up_read(&tty->termios_rwsem); + remove_wait_queue(&tty->read_wait, &wait); if (!waitqueue_active(&tty->read_wait)) ldata->minimum_to_wake = minimum; + mutex_unlock(&ldata->atomic_read_lock); + __set_current_state(TASK_RUNNING); if (b - buf) retval = b - buf; - n_tty_set_room(tty); - up_read(&tty->termios_rwsem); return retval; } @@ -2387,7 +2409,7 @@ static unsigned int n_tty_poll(struct tty_struct *tty, struct file *file, poll_wait(file, &tty->read_wait, wait); poll_wait(file, &tty->write_wait, wait); - if (input_available_p(tty, TIME_CHAR(tty) ? 0 : MIN_CHAR(tty))) + if (input_available_p(tty, 1)) mask |= POLLIN | POLLRDNORM; if (tty->packet && tty->link->ctrl_status) mask |= POLLPRI | POLLIN | POLLRDNORM; diff --git a/drivers/tty/rocket.c b/drivers/tty/rocket.c index 354564ea47c5..383c4c796637 100644 --- a/drivers/tty/rocket.c +++ b/drivers/tty/rocket.c @@ -1744,7 +1744,7 @@ static void rp_flush_buffer(struct tty_struct *tty) #ifdef CONFIG_PCI -static DEFINE_PCI_DEVICE_TABLE(rocket_pci_ids) = { +static const struct pci_device_id rocket_pci_ids[] = { { PCI_DEVICE(PCI_VENDOR_ID_RP, PCI_DEVICE_ID_RP4QUAD) }, { PCI_DEVICE(PCI_VENDOR_ID_RP, PCI_DEVICE_ID_RP8OCTA) }, { PCI_DEVICE(PCI_VENDOR_ID_RP, PCI_DEVICE_ID_URP8OCTA) }, diff --git a/drivers/tty/serial/8250/8250_core.c b/drivers/tty/serial/8250/8250_core.c index e33d38cb170f..61ecd709a722 100644 --- a/drivers/tty/serial/8250/8250_core.c +++ b/drivers/tty/serial/8250/8250_core.c @@ -2670,6 +2670,10 @@ static void serial8250_config_port(struct uart_port *port, int flags) if (port->type == PORT_16550A && port->iotype == UPIO_AU) up->bugs |= UART_BUG_NOMSR; + /* HW bugs may trigger IRQ while IIR == NO_INT */ + if (port->type == PORT_TEGRA) + up->bugs |= UART_BUG_NOMSR; + if (port->type != PORT_UNKNOWN && flags & UART_CONFIG_IRQ) autoconfig_irq(up); diff --git a/drivers/tty/serial/8250/8250_dw.c b/drivers/tty/serial/8250/8250_dw.c index 4658e3e0ec42..faa64e646100 100644 --- a/drivers/tty/serial/8250/8250_dw.c +++ b/drivers/tty/serial/8250/8250_dw.c @@ -14,7 +14,6 @@ * raised, the LCR needs to be rewritten and the uart status register read. */ #include <linux/device.h> -#include <linux/init.h> #include <linux/io.h> #include <linux/module.h> #include <linux/serial_8250.h> @@ -96,7 +95,8 @@ static void dw8250_serial_out(struct uart_port *p, int offset, int value) if (offset == UART_LCR) { int tries = 1000; while (tries--) { - if (value == p->serial_in(p, UART_LCR)) + unsigned int lcr = p->serial_in(p, UART_LCR); + if ((value & ~UART_LCR_SPAR) == (lcr & ~UART_LCR_SPAR)) return; dw8250_force_idle(p); writeb(value, p->membase + (UART_LCR << p->regshift)); @@ -132,7 +132,8 @@ static void dw8250_serial_out32(struct uart_port *p, int offset, int value) if (offset == UART_LCR) { int tries = 1000; while (tries--) { - if (value == p->serial_in(p, UART_LCR)) + unsigned int lcr = p->serial_in(p, UART_LCR); + if ((value & ~UART_LCR_SPAR) == (lcr & ~UART_LCR_SPAR)) return; dw8250_force_idle(p); writel(value, p->membase + (UART_LCR << p->regshift)); @@ -272,7 +273,6 @@ static int dw8250_probe_of(struct uart_port *p, return 0; } -#ifdef CONFIG_ACPI static int dw8250_probe_acpi(struct uart_8250_port *up, struct dw8250_data *data) { @@ -300,13 +300,6 @@ static int dw8250_probe_acpi(struct uart_8250_port *up, return 0; } -#else -static inline int dw8250_probe_acpi(struct uart_8250_port *up, - struct dw8250_data *data) -{ - return -ENODEV; -} -#endif /* CONFIG_ACPI */ static int dw8250_probe(struct platform_device *pdev) { @@ -455,6 +448,8 @@ MODULE_DEVICE_TABLE(of, dw8250_of_match); static const struct acpi_device_id dw8250_acpi_match[] = { { "INT33C4", 0 }, { "INT33C5", 0 }, + { "INT3434", 0 }, + { "INT3435", 0 }, { "80860F0A", 0 }, { }, }; diff --git a/drivers/tty/serial/8250/8250_em.c b/drivers/tty/serial/8250/8250_em.c index d1a9078003bd..56c87232b6a0 100644 --- a/drivers/tty/serial/8250/8250_em.c +++ b/drivers/tty/serial/8250/8250_em.c @@ -18,7 +18,6 @@ */ #include <linux/device.h> -#include <linux/init.h> #include <linux/io.h> #include <linux/module.h> #include <linux/serial_8250.h> diff --git a/drivers/tty/serial/8250/8250_pci.c b/drivers/tty/serial/8250/8250_pci.c index 4697a514b80a..50228eed3b6f 100644 --- a/drivers/tty/serial/8250/8250_pci.c +++ b/drivers/tty/serial/8250/8250_pci.c @@ -11,7 +11,6 @@ */ #undef DEBUG #include <linux/module.h> -#include <linux/init.h> #include <linux/pci.h> #include <linux/string.h> #include <linux/kernel.h> @@ -1259,10 +1258,10 @@ static int pci_quatech_init(struct pci_dev *dev) unsigned long base = pci_resource_start(dev, 0); if (base) { u32 tmp; - outl(inl(base + 0x38), base + 0x38); + outl(inl(base + 0x38) | 0x00002000, base + 0x38); tmp = inl(base + 0x3c); outl(tmp | 0x01000000, base + 0x3c); - outl(tmp, base + 0x3c); + outl(tmp &= ~0x01000000, base + 0x3c); } } return 0; @@ -1744,6 +1743,7 @@ pci_wch_ch353_setup(struct serial_private *priv, #define PCI_DEVICE_ID_TITAN_800E 0xA014 #define PCI_DEVICE_ID_TITAN_200EI 0xA016 #define PCI_DEVICE_ID_TITAN_200EISI 0xA017 +#define PCI_DEVICE_ID_TITAN_200V3 0xA306 #define PCI_DEVICE_ID_TITAN_400V3 0xA310 #define PCI_DEVICE_ID_TITAN_410V3 0xA312 #define PCI_DEVICE_ID_TITAN_800V3 0xA314 @@ -4427,6 +4427,9 @@ static struct pci_device_id serial_pci_tbl[] = { { PCI_VENDOR_ID_TITAN, PCI_DEVICE_ID_TITAN_200EISI, PCI_ANY_ID, PCI_ANY_ID, 0, 0, pbn_oxsemi_2_4000000 }, + { PCI_VENDOR_ID_TITAN, PCI_DEVICE_ID_TITAN_200V3, + PCI_ANY_ID, PCI_ANY_ID, 0, 0, + pbn_b0_bt_2_921600 }, { PCI_VENDOR_ID_TITAN, PCI_DEVICE_ID_TITAN_400V3, PCI_ANY_ID, PCI_ANY_ID, 0, 0, pbn_b0_4_921600 }, diff --git a/drivers/tty/serial/8250/8250_pnp.c b/drivers/tty/serial/8250/8250_pnp.c index 35d9ab95c5cb..682a2fbe5c06 100644 --- a/drivers/tty/serial/8250/8250_pnp.c +++ b/drivers/tty/serial/8250/8250_pnp.c @@ -12,7 +12,6 @@ * the Free Software Foundation; either version 2 of the License. */ #include <linux/module.h> -#include <linux/init.h> #include <linux/pci.h> #include <linux/pnp.h> #include <linux/string.h> diff --git a/drivers/tty/serial/8250/Kconfig b/drivers/tty/serial/8250/Kconfig index f3b306efaa59..23329918f229 100644 --- a/drivers/tty/serial/8250/Kconfig +++ b/drivers/tty/serial/8250/Kconfig @@ -41,7 +41,7 @@ config SERIAL_8250_DEPRECATED_OPTIONS accept kernel parameters in both forms like 8250_core.nr_uarts=4 and 8250.nr_uarts=4. We now renamed the module back to 8250, but if anybody noticed in 3.7 and changed their userspace we still have to - keep the 8350_core.* options around until they revert the changes + keep the 8250_core.* options around until they revert the changes they already did. If 8250 is built as a module, this adds 8250_core alias instead. diff --git a/drivers/tty/serial/8250/serial_cs.c b/drivers/tty/serial/8250/serial_cs.c index 1b74b88e1e1e..4d180c9423ef 100644 --- a/drivers/tty/serial/8250/serial_cs.c +++ b/drivers/tty/serial/8250/serial_cs.c @@ -34,7 +34,6 @@ #include <linux/module.h> #include <linux/moduleparam.h> #include <linux/kernel.h> -#include <linux/init.h> #include <linux/ptrace.h> #include <linux/slab.h> #include <linux/string.h> diff --git a/drivers/tty/serial/Kconfig b/drivers/tty/serial/Kconfig index a3817ab8602f..441ada489874 100644 --- a/drivers/tty/serial/Kconfig +++ b/drivers/tty/serial/Kconfig @@ -181,9 +181,8 @@ config SERIAL_KS8695_CONSOLE config SERIAL_CLPS711X tristate "CLPS711X serial port support" - depends on ARCH_CLPS711X + depends on ARCH_CLPS711X || COMPILE_TEST select SERIAL_CORE - default y help This enables the driver for the on-chip UARTs of the Cirrus Logic EP711x/EP721x/EP731x processors. @@ -1146,31 +1145,13 @@ config SERIAL_QE This driver supports the QE serial ports on Freescale embedded PowerPC that contain a QUICC Engine. -config SERIAL_SC26XX - tristate "SC2681/SC2692 serial port support" - depends on SNI_RM - select SERIAL_CORE - help - This is a driver for the onboard serial ports of - older RM400 machines. - -config SERIAL_SC26XX_CONSOLE - bool "Console on SC2681/SC2692 serial port" - depends on SERIAL_SC26XX=y - select SERIAL_CORE_CONSOLE - help - Support for Console on SC2681/SC2692 serial ports. - config SERIAL_SCCNXP tristate "SCCNXP serial port support" - depends on !SERIAL_SC26XX select SERIAL_CORE - default n help This selects support for an advanced UART from NXP (Philips). Supported ICs are SCC2681, SCC2691, SCC2692, SC28L91, SC28L92, SC28L202, SCC68681 and SCC68692. - Positioned as a replacement for the driver SC26XX. config SERIAL_SCCNXP_CONSOLE bool "Console on SCCNXP serial port" diff --git a/drivers/tty/serial/Makefile b/drivers/tty/serial/Makefile index 3068c7722087..3680854fef41 100644 --- a/drivers/tty/serial/Makefile +++ b/drivers/tty/serial/Makefile @@ -47,7 +47,6 @@ obj-$(CONFIG_SERIAL_M32R_SIO) += m32r_sio.o obj-$(CONFIG_SERIAL_MPSC) += mpsc.o obj-$(CONFIG_SERIAL_SB1250_DUART) += sb1250-duart.o obj-$(CONFIG_ETRAX_SERIAL) += crisv10.o -obj-$(CONFIG_SERIAL_SC26XX) += sc26xx.o obj-$(CONFIG_SERIAL_SCCNXP) += sccnxp.o obj-$(CONFIG_SERIAL_JSM) += jsm/ obj-$(CONFIG_SERIAL_TXX9) += serial_txx9.o diff --git a/drivers/tty/serial/amba-pl010.c b/drivers/tty/serial/amba-pl010.c index 33bd8606be62..01c9e72433e1 100644 --- a/drivers/tty/serial/amba-pl010.c +++ b/drivers/tty/serial/amba-pl010.c @@ -756,9 +756,10 @@ static int pl010_remove(struct amba_device *dev) return 0; } -static int pl010_suspend(struct amba_device *dev, pm_message_t state) +#ifdef CONFIG_PM_SLEEP +static int pl010_suspend(struct device *dev) { - struct uart_amba_port *uap = amba_get_drvdata(dev); + struct uart_amba_port *uap = dev_get_drvdata(dev); if (uap) uart_suspend_port(&amba_reg, &uap->port); @@ -766,15 +767,18 @@ static int pl010_suspend(struct amba_device *dev, pm_message_t state) return 0; } -static int pl010_resume(struct amba_device *dev) +static int pl010_resume(struct device *dev) { - struct uart_amba_port *uap = amba_get_drvdata(dev); + struct uart_amba_port *uap = dev_get_drvdata(dev); if (uap) uart_resume_port(&amba_reg, &uap->port); return 0; } +#endif + +static SIMPLE_DEV_PM_OPS(pl010_dev_pm_ops, pl010_suspend, pl010_resume); static struct amba_id pl010_ids[] = { { @@ -789,12 +793,11 @@ MODULE_DEVICE_TABLE(amba, pl010_ids); static struct amba_driver pl010_driver = { .drv = { .name = "uart-pl010", + .pm = &pl010_dev_pm_ops, }, .id_table = pl010_ids, .probe = pl010_probe, .remove = pl010_remove, - .suspend = pl010_suspend, - .resume = pl010_resume, }; static int __init pl010_init(void) diff --git a/drivers/tty/serial/amba-pl011.c b/drivers/tty/serial/amba-pl011.c index 7203864992a5..d58783d364e3 100644 --- a/drivers/tty/serial/amba-pl011.c +++ b/drivers/tty/serial/amba-pl011.c @@ -112,8 +112,6 @@ static struct vendor_data vendor_st = { .get_fifosize = get_fifosize_st, }; -static struct uart_amba_port *amba_ports[UART_NR]; - /* Deals with DMA transactions */ struct pl011_sgbuf { @@ -969,6 +967,8 @@ static void pl011_dma_rx_poll(unsigned long args) spin_lock_irqsave(&uap->port.lock, flags); pl011_dma_rx_stop(uap); + uap->im |= UART011_RXIM; + writew(uap->im, uap->port.membase + UART011_IMSC); spin_unlock_irqrestore(&uap->port.lock, flags); uap->dmarx.running = false; @@ -1216,8 +1216,8 @@ __acquires(&uap->port.lock) dev_dbg(uap->port.dev, "could not trigger RX DMA job " "fall back to interrupt mode again\n"); uap->im |= UART011_RXIM; + writew(uap->im, uap->port.membase + UART011_IMSC); } else { - uap->im &= ~UART011_RXIM; #ifdef CONFIG_DMA_ENGINE /* Start Rx DMA poll */ if (uap->dmarx.poll_rate) { @@ -1229,8 +1229,6 @@ __acquires(&uap->port.lock) } #endif } - - writew(uap->im, uap->port.membase + UART011_IMSC); } spin_lock(&uap->port.lock); } @@ -1513,10 +1511,25 @@ static int pl011_hwinit(struct uart_port *port) return retval; } +static void pl011_write_lcr_h(struct uart_amba_port *uap, unsigned int lcr_h) +{ + writew(lcr_h, uap->port.membase + uap->lcrh_rx); + if (uap->lcrh_rx != uap->lcrh_tx) { + int i; + /* + * Wait 10 PCLKs before writing LCRH_TX register, + * to get this delay write read only register 10 times + */ + for (i = 0; i < 10; ++i) + writew(0xff, uap->port.membase + UART011_MIS); + writew(lcr_h, uap->port.membase + uap->lcrh_tx); + } +} + static int pl011_startup(struct uart_port *port) { struct uart_amba_port *uap = (struct uart_amba_port *)port; - unsigned int cr; + unsigned int cr, lcr_h, fbrd, ibrd; int retval; retval = pl011_hwinit(port); @@ -1535,32 +1548,36 @@ static int pl011_startup(struct uart_port *port) writew(uap->vendor->ifls, uap->port.membase + UART011_IFLS); /* - * Provoke TX FIFO interrupt into asserting. + * Provoke TX FIFO interrupt into asserting. Taking care to preserve + * baud rate and data format specified by FBRD, IBRD and LCRH as the + * UART may already be in use as a console. */ + spin_lock_irq(&uap->port.lock); + + fbrd = readw(uap->port.membase + UART011_FBRD); + ibrd = readw(uap->port.membase + UART011_IBRD); + lcr_h = readw(uap->port.membase + uap->lcrh_rx); + cr = UART01x_CR_UARTEN | UART011_CR_TXE | UART011_CR_LBE; writew(cr, uap->port.membase + UART011_CR); writew(0, uap->port.membase + UART011_FBRD); writew(1, uap->port.membase + UART011_IBRD); - writew(0, uap->port.membase + uap->lcrh_rx); - if (uap->lcrh_tx != uap->lcrh_rx) { - int i; - /* - * Wait 10 PCLKs before writing LCRH_TX register, - * to get this delay write read only register 10 times - */ - for (i = 0; i < 10; ++i) - writew(0xff, uap->port.membase + UART011_MIS); - writew(0, uap->port.membase + uap->lcrh_tx); - } + pl011_write_lcr_h(uap, 0); writew(0, uap->port.membase + UART01x_DR); while (readw(uap->port.membase + UART01x_FR) & UART01x_FR_BUSY) barrier(); + writew(fbrd, uap->port.membase + UART011_FBRD); + writew(ibrd, uap->port.membase + UART011_IBRD); + pl011_write_lcr_h(uap, lcr_h); + /* restore RTS and DTR */ cr = uap->old_cr & (UART011_CR_RTS | UART011_CR_DTR); cr |= UART01x_CR_UARTEN | UART011_CR_RXE | UART011_CR_TXE; writew(cr, uap->port.membase + UART011_CR); + spin_unlock_irq(&uap->port.lock); + /* * initialise the old status of the modem signals */ @@ -1629,11 +1646,13 @@ static void pl011_shutdown(struct uart_port *port) * it during startup(). */ uap->autorts = false; + spin_lock_irq(&uap->port.lock); cr = readw(uap->port.membase + UART011_CR); uap->old_cr = cr; cr &= UART011_CR_RTS | UART011_CR_DTR; cr |= UART01x_CR_UARTEN | UART011_CR_TXE; writew(cr, uap->port.membase + UART011_CR); + spin_unlock_irq(&uap->port.lock); /* * disable break condition and fifos @@ -1797,17 +1816,7 @@ pl011_set_termios(struct uart_port *port, struct ktermios *termios, * UART011_FBRD & UART011_IBRD. * ----------^----------^----------^----------^----- */ - writew(lcr_h, port->membase + uap->lcrh_rx); - if (uap->lcrh_rx != uap->lcrh_tx) { - int i; - /* - * Wait 10 PCLKs before writing LCRH_TX register, - * to get this delay write read only register 10 times - */ - for (i = 0; i < 10; ++i) - writew(0xff, uap->port.membase + UART011_MIS); - writew(lcr_h, port->membase + uap->lcrh_tx); - } + pl011_write_lcr_h(uap, lcr_h); writew(old_cr, port->membase + UART011_CR); spin_unlock_irqrestore(&port->lock, flags); @@ -2169,10 +2178,10 @@ static int pl011_remove(struct amba_device *dev) return 0; } -#ifdef CONFIG_PM -static int pl011_suspend(struct amba_device *dev, pm_message_t state) +#ifdef CONFIG_PM_SLEEP +static int pl011_suspend(struct device *dev) { - struct uart_amba_port *uap = amba_get_drvdata(dev); + struct uart_amba_port *uap = dev_get_drvdata(dev); if (!uap) return -EINVAL; @@ -2180,9 +2189,9 @@ static int pl011_suspend(struct amba_device *dev, pm_message_t state) return uart_suspend_port(&amba_reg, &uap->port); } -static int pl011_resume(struct amba_device *dev) +static int pl011_resume(struct device *dev) { - struct uart_amba_port *uap = amba_get_drvdata(dev); + struct uart_amba_port *uap = dev_get_drvdata(dev); if (!uap) return -EINVAL; @@ -2191,6 +2200,8 @@ static int pl011_resume(struct amba_device *dev) } #endif +static SIMPLE_DEV_PM_OPS(pl011_dev_pm_ops, pl011_suspend, pl011_resume); + static struct amba_id pl011_ids[] = { { .id = 0x00041011, @@ -2210,14 +2221,11 @@ MODULE_DEVICE_TABLE(amba, pl011_ids); static struct amba_driver pl011_driver = { .drv = { .name = "uart-pl011", + .pm = &pl011_dev_pm_ops, }, .id_table = pl011_ids, .probe = pl011_probe, .remove = pl011_remove, -#ifdef CONFIG_PM - .suspend = pl011_suspend, - .resume = pl011_resume, -#endif }; static int __init pl011_init(void) diff --git a/drivers/tty/serial/atmel_serial.c b/drivers/tty/serial/atmel_serial.c index c7d99af46a96..a49f10d269b2 100644 --- a/drivers/tty/serial/atmel_serial.c +++ b/drivers/tty/serial/atmel_serial.c @@ -825,9 +825,6 @@ static void atmel_release_rx_dma(struct uart_port *port) atmel_port->desc_rx = NULL; atmel_port->chan_rx = NULL; atmel_port->cookie_rx = -EINVAL; - - if (!atmel_port->is_usart) - del_timer_sync(&atmel_port->uart_timer); } static void atmel_rx_from_dma(struct uart_port *port) @@ -1229,9 +1226,6 @@ static void atmel_release_rx_pdc(struct uart_port *port) DMA_FROM_DEVICE); kfree(pdc->buf); } - - if (!atmel_port->is_usart) - del_timer_sync(&atmel_port->uart_timer); } static void atmel_rx_from_pdc(struct uart_port *port) @@ -1604,12 +1598,13 @@ static int atmel_startup(struct uart_port *port) /* enable xmit & rcvr */ UART_PUT_CR(port, ATMEL_US_TXEN | ATMEL_US_RXEN); + setup_timer(&atmel_port->uart_timer, + atmel_uart_timer_callback, + (unsigned long)port); + if (atmel_use_pdc_rx(port)) { /* set UART timeout */ if (!atmel_port->is_usart) { - setup_timer(&atmel_port->uart_timer, - atmel_uart_timer_callback, - (unsigned long)port); mod_timer(&atmel_port->uart_timer, jiffies + uart_poll_timeout(port)); /* set USART timeout */ @@ -1624,9 +1619,6 @@ static int atmel_startup(struct uart_port *port) } else if (atmel_use_dma_rx(port)) { /* set UART timeout */ if (!atmel_port->is_usart) { - setup_timer(&atmel_port->uart_timer, - atmel_uart_timer_callback, - (unsigned long)port); mod_timer(&atmel_port->uart_timer, jiffies + uart_poll_timeout(port)); /* set USART timeout */ @@ -1650,12 +1642,30 @@ static int atmel_startup(struct uart_port *port) static void atmel_shutdown(struct uart_port *port) { struct atmel_uart_port *atmel_port = to_atmel_uart_port(port); + /* - * Ensure everything is stopped. + * Prevent any tasklets being scheduled during + * cleanup + */ + del_timer_sync(&atmel_port->uart_timer); + + /* + * Clear out any scheduled tasklets before + * we destroy the buffers + */ + tasklet_kill(&atmel_port->tasklet); + + /* + * Ensure everything is stopped and + * disable all interrupts, port and break condition. */ atmel_stop_rx(port); atmel_stop_tx(port); + UART_PUT_CR(port, ATMEL_US_RSTSTA); + UART_PUT_IDR(port, -1); + + /* * Shut-down the DMA. */ @@ -1665,10 +1675,10 @@ static void atmel_shutdown(struct uart_port *port) atmel_port->release_tx(port); /* - * Disable all interrupts, port and break condition. + * Reset ring buffer pointers */ - UART_PUT_CR(port, ATMEL_US_RSTSTA); - UART_PUT_IDR(port, -1); + atmel_port->rx_ring.head = 0; + atmel_port->rx_ring.tail = 0; /* * Free the interrupt @@ -2441,11 +2451,12 @@ static int atmel_serial_remove(struct platform_device *pdev) struct atmel_uart_port *atmel_port = to_atmel_uart_port(port); int ret = 0; + tasklet_kill(&atmel_port->tasklet); + device_init_wakeup(&pdev->dev, 0); ret = uart_remove_one_port(&atmel_uart, port); - tasklet_kill(&atmel_port->tasklet); kfree(atmel_port->rx_ring.buf); /* "port" is allocated statically, so we shouldn't free it */ diff --git a/drivers/tty/serial/clps711x.c b/drivers/tty/serial/clps711x.c index 8d0b994357c8..b0eacb83f831 100644 --- a/drivers/tty/serial/clps711x.c +++ b/drivers/tty/serial/clps711x.c @@ -21,44 +21,66 @@ #include <linux/console.h> #include <linux/serial_core.h> #include <linux/serial.h> -#include <linux/io.h> #include <linux/clk.h> +#include <linux/io.h> #include <linux/tty.h> #include <linux/tty_flip.h> #include <linux/ioport.h> +#include <linux/of.h> #include <linux/platform_device.h> +#include <linux/regmap.h> -#include <mach/hardware.h> +#include <linux/mfd/syscon.h> +#include <linux/mfd/syscon/clps711x.h> -#define UART_CLPS711X_NAME "uart-clps711x" +#define UART_CLPS711X_DEVNAME "ttyCL" #define UART_CLPS711X_NR 2 #define UART_CLPS711X_MAJOR 204 #define UART_CLPS711X_MINOR 40 -#define UBRLCR(port) ((port)->line ? UBRLCR2 : UBRLCR1) -#define UARTDR(port) ((port)->line ? UARTDR2 : UARTDR1) -#define SYSFLG(port) ((port)->line ? SYSFLG2 : SYSFLG1) -#define SYSCON(port) ((port)->line ? SYSCON2 : SYSCON1) -#define TX_IRQ(port) ((port)->line ? IRQ_UTXINT2 : IRQ_UTXINT1) -#define RX_IRQ(port) ((port)->line ? IRQ_URXINT2 : IRQ_URXINT1) +#define UARTDR_OFFSET (0x00) +#define UBRLCR_OFFSET (0x40) + +#define UARTDR_FRMERR (1 << 8) +#define UARTDR_PARERR (1 << 9) +#define UARTDR_OVERR (1 << 10) + +#define UBRLCR_BAUD_MASK ((1 << 12) - 1) +#define UBRLCR_BREAK (1 << 12) +#define UBRLCR_PRTEN (1 << 13) +#define UBRLCR_EVENPRT (1 << 14) +#define UBRLCR_XSTOP (1 << 15) +#define UBRLCR_FIFOEN (1 << 16) +#define UBRLCR_WRDLEN5 (0 << 17) +#define UBRLCR_WRDLEN6 (1 << 17) +#define UBRLCR_WRDLEN7 (2 << 17) +#define UBRLCR_WRDLEN8 (3 << 17) +#define UBRLCR_WRDLEN_MASK (3 << 17) struct clps711x_port { - struct uart_driver uart; - struct clk *uart_clk; - struct uart_port port[UART_CLPS711X_NR]; - int tx_enabled[UART_CLPS711X_NR]; -#ifdef CONFIG_SERIAL_CLPS711X_CONSOLE - struct console console; -#endif + struct uart_port port; + unsigned int tx_enabled; + int rx_irq; + struct regmap *syscon; + bool use_ms; +}; + +static struct uart_driver clps711x_uart = { + .owner = THIS_MODULE, + .driver_name = UART_CLPS711X_DEVNAME, + .dev_name = UART_CLPS711X_DEVNAME, + .major = UART_CLPS711X_MAJOR, + .minor = UART_CLPS711X_MINOR, + .nr = UART_CLPS711X_NR, }; static void uart_clps711x_stop_tx(struct uart_port *port) { struct clps711x_port *s = dev_get_drvdata(port->dev); - if (s->tx_enabled[port->line]) { - disable_irq(TX_IRQ(port)); - s->tx_enabled[port->line] = 0; + if (s->tx_enabled) { + disable_irq(port->irq); + s->tx_enabled = 0; } } @@ -66,33 +88,27 @@ static void uart_clps711x_start_tx(struct uart_port *port) { struct clps711x_port *s = dev_get_drvdata(port->dev); - if (!s->tx_enabled[port->line]) { - enable_irq(TX_IRQ(port)); - s->tx_enabled[port->line] = 1; + if (!s->tx_enabled) { + s->tx_enabled = 1; + enable_irq(port->irq); } } -static void uart_clps711x_stop_rx(struct uart_port *port) -{ - disable_irq(RX_IRQ(port)); -} - -static void uart_clps711x_enable_ms(struct uart_port *port) -{ - /* Do nothing */ -} - static irqreturn_t uart_clps711x_int_rx(int irq, void *dev_id) { struct uart_port *port = dev_id; - unsigned int status, ch, flg; + struct clps711x_port *s = dev_get_drvdata(port->dev); + unsigned int status, flg; + u16 ch; for (;;) { - status = clps_readl(SYSFLG(port)); - if (status & SYSFLG_URXFE) + u32 sysflg = 0; + + regmap_read(s->syscon, SYSFLG_OFFSET, &sysflg); + if (sysflg & SYSFLG_URXFE) break; - ch = clps_readw(UARTDR(port)); + ch = readw(port->membase + UARTDR_OFFSET); status = ch & (UARTDR_FRMERR | UARTDR_PARERR | UARTDR_OVERR); ch &= 0xff; @@ -138,23 +154,29 @@ static irqreturn_t uart_clps711x_int_tx(int irq, void *dev_id) struct circ_buf *xmit = &port->state->xmit; if (port->x_char) { - clps_writew(port->x_char, UARTDR(port)); + writew(port->x_char, port->membase + UARTDR_OFFSET); port->icount.tx++; port->x_char = 0; return IRQ_HANDLED; } if (uart_circ_empty(xmit) || uart_tx_stopped(port)) { - disable_irq_nosync(TX_IRQ(port)); - s->tx_enabled[port->line] = 0; + if (s->tx_enabled) { + disable_irq_nosync(port->irq); + s->tx_enabled = 0; + } return IRQ_HANDLED; } while (!uart_circ_empty(xmit)) { - clps_writew(xmit->buf[xmit->tail], UARTDR(port)); + u32 sysflg = 0; + + writew(xmit->buf[xmit->tail], port->membase + UARTDR_OFFSET); xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1); port->icount.tx++; - if (clps_readl(SYSFLG(port) & SYSFLG_UTXFF)) + + regmap_read(s->syscon, SYSFLG_OFFSET, &sysflg); + if (sysflg & SYSFLG_UTXFF) break; } @@ -166,20 +188,28 @@ static irqreturn_t uart_clps711x_int_tx(int irq, void *dev_id) static unsigned int uart_clps711x_tx_empty(struct uart_port *port) { - return (clps_readl(SYSFLG(port) & SYSFLG_UBUSY)) ? 0 : TIOCSER_TEMT; + struct clps711x_port *s = dev_get_drvdata(port->dev); + u32 sysflg = 0; + + regmap_read(s->syscon, SYSFLG_OFFSET, &sysflg); + + return (sysflg & SYSFLG_UBUSY) ? 0 : TIOCSER_TEMT; } static unsigned int uart_clps711x_get_mctrl(struct uart_port *port) { - unsigned int status, result = 0; + struct clps711x_port *s = dev_get_drvdata(port->dev); + unsigned int result = 0; + + if (s->use_ms) { + u32 sysflg = 0; - if (port->line == 0) { - status = clps_readl(SYSFLG1); - if (status & SYSFLG1_DCD) + regmap_read(s->syscon, SYSFLG_OFFSET, &sysflg); + if (sysflg & SYSFLG1_DCD) result |= TIOCM_CAR; - if (status & SYSFLG1_DSR) + if (sysflg & SYSFLG1_DSR) result |= TIOCM_DSR; - if (status & SYSFLG1_CTS) + if (sysflg & SYSFLG1_CTS) result |= TIOCM_CTS; } else result = TIOCM_DSR | TIOCM_CTS | TIOCM_CAR; @@ -194,65 +224,53 @@ static void uart_clps711x_set_mctrl(struct uart_port *port, unsigned int mctrl) static void uart_clps711x_break_ctl(struct uart_port *port, int break_state) { - unsigned long flags; unsigned int ubrlcr; - spin_lock_irqsave(&port->lock, flags); - - ubrlcr = clps_readl(UBRLCR(port)); + ubrlcr = readl(port->membase + UBRLCR_OFFSET); if (break_state) ubrlcr |= UBRLCR_BREAK; else ubrlcr &= ~UBRLCR_BREAK; - clps_writel(ubrlcr, UBRLCR(port)); + writel(ubrlcr, port->membase + UBRLCR_OFFSET); +} + +static void uart_clps711x_set_ldisc(struct uart_port *port, int ld) +{ + if (!port->line) { + struct clps711x_port *s = dev_get_drvdata(port->dev); - spin_unlock_irqrestore(&port->lock, flags); + regmap_update_bits(s->syscon, SYSCON_OFFSET, SYSCON1_SIREN, + (ld == N_IRDA) ? SYSCON1_SIREN : 0); + } } static int uart_clps711x_startup(struct uart_port *port) { struct clps711x_port *s = dev_get_drvdata(port->dev); - int ret; - - s->tx_enabled[port->line] = 1; - /* Allocate the IRQs */ - ret = devm_request_irq(port->dev, TX_IRQ(port), uart_clps711x_int_tx, - 0, UART_CLPS711X_NAME " TX", port); - if (ret) - return ret; - - ret = devm_request_irq(port->dev, RX_IRQ(port), uart_clps711x_int_rx, - 0, UART_CLPS711X_NAME " RX", port); - if (ret) { - devm_free_irq(port->dev, TX_IRQ(port), port); - return ret; - } /* Disable break */ - clps_writel(clps_readl(UBRLCR(port)) & ~UBRLCR_BREAK, UBRLCR(port)); + writel(readl(port->membase + UBRLCR_OFFSET) & ~UBRLCR_BREAK, + port->membase + UBRLCR_OFFSET); /* Enable the port */ - clps_writel(clps_readl(SYSCON(port)) | SYSCON_UARTEN, SYSCON(port)); - - return 0; + return regmap_update_bits(s->syscon, SYSCON_OFFSET, + SYSCON_UARTEN, SYSCON_UARTEN); } static void uart_clps711x_shutdown(struct uart_port *port) { - /* Free the interrupts */ - devm_free_irq(port->dev, TX_IRQ(port), port); - devm_free_irq(port->dev, RX_IRQ(port), port); + struct clps711x_port *s = dev_get_drvdata(port->dev); /* Disable the port */ - clps_writel(clps_readl(SYSCON(port)) & ~SYSCON_UARTEN, SYSCON(port)); + regmap_update_bits(s->syscon, SYSCON_OFFSET, SYSCON_UARTEN, 0); } static void uart_clps711x_set_termios(struct uart_port *port, struct ktermios *termios, struct ktermios *old) { - unsigned int ubrlcr, baud, quot; - unsigned long flags; + u32 ubrlcr; + unsigned int baud, quot; /* Mask termios capabilities we don't support */ termios->c_cflag &= ~CMSPAR; @@ -291,8 +309,6 @@ static void uart_clps711x_set_termios(struct uart_port *port, /* Enable FIFO */ ubrlcr |= UBRLCR_FIFOEN; - spin_lock_irqsave(&port->lock, flags); - /* Set read status mask */ port->read_status_mask = UARTDR_OVERR; if (termios->c_iflag & INPCK) @@ -306,9 +322,7 @@ static void uart_clps711x_set_termios(struct uart_port *port, uart_update_timeout(port, termios->c_cflag, baud); - clps_writel(ubrlcr | (quot - 1), UBRLCR(port)); - - spin_unlock_irqrestore(&port->lock, flags); + writel(ubrlcr | (quot - 1), port->membase + UBRLCR_OFFSET); } static const char *uart_clps711x_type(struct uart_port *port) @@ -322,14 +336,12 @@ static void uart_clps711x_config_port(struct uart_port *port, int flags) port->type = PORT_CLPS711X; } -static void uart_clps711x_release_port(struct uart_port *port) +static void uart_clps711x_nop_void(struct uart_port *port) { - /* Do nothing */ } -static int uart_clps711x_request_port(struct uart_port *port) +static int uart_clps711x_nop_int(struct uart_port *port) { - /* Do nothing */ return 0; } @@ -339,181 +351,237 @@ static const struct uart_ops uart_clps711x_ops = { .get_mctrl = uart_clps711x_get_mctrl, .stop_tx = uart_clps711x_stop_tx, .start_tx = uart_clps711x_start_tx, - .stop_rx = uart_clps711x_stop_rx, - .enable_ms = uart_clps711x_enable_ms, + .stop_rx = uart_clps711x_nop_void, + .enable_ms = uart_clps711x_nop_void, .break_ctl = uart_clps711x_break_ctl, + .set_ldisc = uart_clps711x_set_ldisc, .startup = uart_clps711x_startup, .shutdown = uart_clps711x_shutdown, .set_termios = uart_clps711x_set_termios, .type = uart_clps711x_type, .config_port = uart_clps711x_config_port, - .release_port = uart_clps711x_release_port, - .request_port = uart_clps711x_request_port, + .release_port = uart_clps711x_nop_void, + .request_port = uart_clps711x_nop_int, }; #ifdef CONFIG_SERIAL_CLPS711X_CONSOLE static void uart_clps711x_console_putchar(struct uart_port *port, int ch) { - while (clps_readl(SYSFLG(port)) & SYSFLG_UTXFF) - barrier(); + struct clps711x_port *s = dev_get_drvdata(port->dev); + u32 sysflg = 0; + + do { + regmap_read(s->syscon, SYSFLG_OFFSET, &sysflg); + } while (sysflg & SYSFLG_UTXFF); - clps_writew(ch, UARTDR(port)); + writew(ch, port->membase + UARTDR_OFFSET); } static void uart_clps711x_console_write(struct console *co, const char *c, unsigned n) { - struct clps711x_port *s = (struct clps711x_port *)co->data; - struct uart_port *port = &s->port[co->index]; - u32 syscon; - - /* Ensure that the port is enabled */ - syscon = clps_readl(SYSCON(port)); - clps_writel(syscon | SYSCON_UARTEN, SYSCON(port)); + struct uart_port *port = clps711x_uart.state[co->index].uart_port; + struct clps711x_port *s = dev_get_drvdata(port->dev); + u32 sysflg = 0; uart_console_write(port, c, n, uart_clps711x_console_putchar); /* Wait for transmitter to become empty */ - while (clps_readl(SYSFLG(port)) & SYSFLG_UBUSY) - barrier(); - - /* Restore the uart state */ - clps_writel(syscon, SYSCON(port)); + do { + regmap_read(s->syscon, SYSFLG_OFFSET, &sysflg); + } while (sysflg & SYSFLG_UBUSY); } -static void uart_clps711x_console_get_options(struct uart_port *port, - int *baud, int *parity, - int *bits) +static int uart_clps711x_console_setup(struct console *co, char *options) { - if (clps_readl(SYSCON(port)) & SYSCON_UARTEN) { - unsigned int ubrlcr, quot; + int baud = 38400, bits = 8, parity = 'n', flow = 'n'; + int ret, index = co->index; + struct clps711x_port *s; + struct uart_port *port; + unsigned int quot; + u32 ubrlcr; - ubrlcr = clps_readl(UBRLCR(port)); + if (index < 0 || index >= UART_CLPS711X_NR) + return -EINVAL; - *parity = 'n'; - if (ubrlcr & UBRLCR_PRTEN) { - if (ubrlcr & UBRLCR_EVENPRT) - *parity = 'e'; - else - *parity = 'o'; - } + port = clps711x_uart.state[index].uart_port; + if (!port) + return -ENODEV; - if ((ubrlcr & UBRLCR_WRDLEN_MASK) == UBRLCR_WRDLEN7) - *bits = 7; - else - *bits = 8; + s = dev_get_drvdata(port->dev); - quot = ubrlcr & UBRLCR_BAUD_MASK; - *baud = port->uartclk / (16 * (quot + 1)); - } -} + if (!options) { + u32 syscon = 0; -static int uart_clps711x_console_setup(struct console *co, char *options) -{ - int baud = 38400, bits = 8, parity = 'n', flow = 'n'; - struct clps711x_port *s = (struct clps711x_port *)co->data; - struct uart_port *port = &s->port[(co->index > 0) ? co->index : 0]; + regmap_read(s->syscon, SYSCON_OFFSET, &syscon); + if (syscon & SYSCON_UARTEN) { + ubrlcr = readl(port->membase + UBRLCR_OFFSET); + + if (ubrlcr & UBRLCR_PRTEN) { + if (ubrlcr & UBRLCR_EVENPRT) + parity = 'e'; + else + parity = 'o'; + } + + if ((ubrlcr & UBRLCR_WRDLEN_MASK) == UBRLCR_WRDLEN7) + bits = 7; - if (options) + quot = ubrlcr & UBRLCR_BAUD_MASK; + baud = port->uartclk / (16 * (quot + 1)); + } + } else uart_parse_options(options, &baud, &parity, &bits, &flow); - else - uart_clps711x_console_get_options(port, &baud, &parity, &bits); - return uart_set_options(port, co, baud, parity, bits, flow); + ret = uart_set_options(port, co, baud, parity, bits, flow); + if (ret) + return ret; + + return regmap_update_bits(s->syscon, SYSCON_OFFSET, + SYSCON_UARTEN, SYSCON_UARTEN); } + +static struct console clps711x_console = { + .name = UART_CLPS711X_DEVNAME, + .device = uart_console_device, + .write = uart_clps711x_console_write, + .setup = uart_clps711x_console_setup, + .flags = CON_PRINTBUFFER, + .index = -1, +}; #endif static int uart_clps711x_probe(struct platform_device *pdev) { + struct device_node *np = pdev->dev.of_node; + int ret, index = np ? of_alias_get_id(np, "serial") : pdev->id; struct clps711x_port *s; - int ret, i; + struct resource *res; + struct clk *uart_clk; - s = devm_kzalloc(&pdev->dev, sizeof(struct clps711x_port), GFP_KERNEL); - if (!s) { - dev_err(&pdev->dev, "Error allocating port structure\n"); + if (index < 0 || index >= UART_CLPS711X_NR) + return -EINVAL; + + s = devm_kzalloc(&pdev->dev, sizeof(*s), GFP_KERNEL); + if (!s) return -ENOMEM; + + uart_clk = devm_clk_get(&pdev->dev, NULL); + if (IS_ERR(uart_clk)) + return PTR_ERR(uart_clk); + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + s->port.membase = devm_ioremap_resource(&pdev->dev, res); + if (IS_ERR(s->port.membase)) + return PTR_ERR(s->port.membase); + + s->port.irq = platform_get_irq(pdev, 0); + if (IS_ERR_VALUE(s->port.irq)) + return s->port.irq; + + s->rx_irq = platform_get_irq(pdev, 1); + if (IS_ERR_VALUE(s->rx_irq)) + return s->rx_irq; + + if (!np) { + char syscon_name[9]; + + sprintf(syscon_name, "syscon.%i", index + 1); + s->syscon = syscon_regmap_lookup_by_pdevname(syscon_name); + if (IS_ERR(s->syscon)) + return PTR_ERR(s->syscon); + + s->use_ms = !index; + } else { + s->syscon = syscon_regmap_lookup_by_phandle(np, "syscon"); + if (IS_ERR(s->syscon)) + return PTR_ERR(s->syscon); + + if (!index) + s->use_ms = of_property_read_bool(np, "uart-use-ms"); } + + s->port.line = index; + s->port.dev = &pdev->dev; + s->port.iotype = UPIO_MEM32; + s->port.mapbase = res->start; + s->port.type = PORT_CLPS711X; + s->port.fifosize = 16; + s->port.flags = UPF_SKIP_TEST | UPF_FIXED_TYPE; + s->port.uartclk = clk_get_rate(uart_clk); + s->port.ops = &uart_clps711x_ops; + platform_set_drvdata(pdev, s); - s->uart_clk = devm_clk_get(&pdev->dev, "uart"); - if (IS_ERR(s->uart_clk)) { - dev_err(&pdev->dev, "Can't get UART clocks\n"); - return PTR_ERR(s->uart_clk); - } + ret = uart_add_one_port(&clps711x_uart, &s->port); + if (ret) + return ret; - s->uart.owner = THIS_MODULE; - s->uart.dev_name = "ttyCL"; - s->uart.major = UART_CLPS711X_MAJOR; - s->uart.minor = UART_CLPS711X_MINOR; - s->uart.nr = UART_CLPS711X_NR; -#ifdef CONFIG_SERIAL_CLPS711X_CONSOLE - s->uart.cons = &s->console; - s->uart.cons->device = uart_console_device; - s->uart.cons->write = uart_clps711x_console_write; - s->uart.cons->setup = uart_clps711x_console_setup; - s->uart.cons->flags = CON_PRINTBUFFER; - s->uart.cons->index = -1; - s->uart.cons->data = s; - strcpy(s->uart.cons->name, "ttyCL"); -#endif - ret = uart_register_driver(&s->uart); + /* Disable port */ + if (!uart_console(&s->port)) + regmap_update_bits(s->syscon, SYSCON_OFFSET, SYSCON_UARTEN, 0); + + s->tx_enabled = 1; + + ret = devm_request_irq(&pdev->dev, s->port.irq, uart_clps711x_int_tx, 0, + dev_name(&pdev->dev), &s->port); if (ret) { - dev_err(&pdev->dev, "Registering UART driver failed\n"); + uart_remove_one_port(&clps711x_uart, &s->port); return ret; } - for (i = 0; i < UART_CLPS711X_NR; i++) { - s->port[i].line = i; - s->port[i].dev = &pdev->dev; - s->port[i].irq = TX_IRQ(&s->port[i]); - s->port[i].iobase = SYSCON(&s->port[i]); - s->port[i].type = PORT_CLPS711X; - s->port[i].fifosize = 16; - s->port[i].flags = UPF_SKIP_TEST | UPF_FIXED_TYPE; - s->port[i].uartclk = clk_get_rate(s->uart_clk); - s->port[i].ops = &uart_clps711x_ops; - WARN_ON(uart_add_one_port(&s->uart, &s->port[i])); - } + ret = devm_request_irq(&pdev->dev, s->rx_irq, uart_clps711x_int_rx, 0, + dev_name(&pdev->dev), &s->port); + if (ret) + uart_remove_one_port(&clps711x_uart, &s->port); - return 0; + return ret; } static int uart_clps711x_remove(struct platform_device *pdev) { struct clps711x_port *s = platform_get_drvdata(pdev); - int i; - for (i = 0; i < UART_CLPS711X_NR; i++) - uart_remove_one_port(&s->uart, &s->port[i]); - - uart_unregister_driver(&s->uart); - - return 0; + return uart_remove_one_port(&clps711x_uart, &s->port); } -static struct platform_driver clps711x_uart_driver = { +static const struct of_device_id __maybe_unused clps711x_uart_dt_ids[] = { + { .compatible = "cirrus,clps711x-uart", }, + { } +}; +MODULE_DEVICE_TABLE(of, clps711x_uart_dt_ids); + +static struct platform_driver clps711x_uart_platform = { .driver = { - .name = UART_CLPS711X_NAME, - .owner = THIS_MODULE, + .name = "clps711x-uart", + .owner = THIS_MODULE, + .of_match_table = of_match_ptr(clps711x_uart_dt_ids), }, .probe = uart_clps711x_probe, .remove = uart_clps711x_remove, }; -module_platform_driver(clps711x_uart_driver); - -static struct platform_device clps711x_uart_device = { - .name = UART_CLPS711X_NAME, -}; static int __init uart_clps711x_init(void) { - return platform_device_register(&clps711x_uart_device); + int ret; + +#ifdef CONFIG_SERIAL_CLPS711X_CONSOLE + clps711x_uart.cons = &clps711x_console; + clps711x_console.data = &clps711x_uart; +#endif + + ret = uart_register_driver(&clps711x_uart); + if (ret) + return ret; + + return platform_driver_register(&clps711x_uart_platform); } module_init(uart_clps711x_init); static void __exit uart_clps711x_exit(void) { - platform_device_unregister(&clps711x_uart_device); + platform_driver_unregister(&clps711x_uart_platform); + uart_unregister_driver(&clps711x_uart); } module_exit(uart_clps711x_exit); diff --git a/drivers/tty/serial/cpm_uart/cpm_uart_cpm1.c b/drivers/tty/serial/cpm_uart/cpm_uart_cpm1.c index 527a969b0952..6d3b22e93246 100644 --- a/drivers/tty/serial/cpm_uart/cpm_uart_cpm1.c +++ b/drivers/tty/serial/cpm_uart/cpm_uart_cpm1.c @@ -29,7 +29,6 @@ #include <linux/tty.h> #include <linux/gfp.h> #include <linux/ioport.h> -#include <linux/init.h> #include <linux/serial.h> #include <linux/console.h> #include <linux/sysrq.h> diff --git a/drivers/tty/serial/cpm_uart/cpm_uart_cpm2.c b/drivers/tty/serial/cpm_uart/cpm_uart_cpm2.c index a4927e66e741..f46d2ca87209 100644 --- a/drivers/tty/serial/cpm_uart/cpm_uart_cpm2.c +++ b/drivers/tty/serial/cpm_uart/cpm_uart_cpm2.c @@ -29,7 +29,6 @@ #include <linux/tty.h> #include <linux/ioport.h> #include <linux/slab.h> -#include <linux/init.h> #include <linux/serial.h> #include <linux/console.h> #include <linux/sysrq.h> diff --git a/drivers/tty/serial/crisv10.c b/drivers/tty/serial/crisv10.c index 477f22f773fc..690bdea0a0c1 100644 --- a/drivers/tty/serial/crisv10.c +++ b/drivers/tty/serial/crisv10.c @@ -2153,7 +2153,7 @@ static void flush_timeout_function(unsigned long data) fast_timers[info->line].function = NULL; serial_fast_timer_expired++; - TIMERD(DEBUG_LOG(info->line, "flush_timout %i ", info->line)); + TIMERD(DEBUG_LOG(info->line, "flush_timeout %i ", info->line)); TIMERD(DEBUG_LOG(info->line, "num expired: %i\n", serial_fast_timer_expired)); check_flush_timeout(info); } diff --git a/drivers/tty/serial/imx.c b/drivers/tty/serial/imx.c index b2cfdb661947..d799140e53b6 100644 --- a/drivers/tty/serial/imx.c +++ b/drivers/tty/serial/imx.c @@ -806,6 +806,9 @@ static unsigned int imx_get_mctrl(struct uart_port *port) if (readl(sport->port.membase + UCR2) & UCR2_CTS) tmp |= TIOCM_RTS; + if (readl(sport->port.membase + uts_reg(sport)) & UTS_LOOP) + tmp |= TIOCM_LOOP; + return tmp; } @@ -821,6 +824,11 @@ static void imx_set_mctrl(struct uart_port *port, unsigned int mctrl) temp |= UCR2_CTS; writel(temp, sport->port.membase + UCR2); + + temp = readl(sport->port.membase + uts_reg(sport)) & ~UTS_LOOP; + if (mctrl & TIOCM_LOOP) + temp |= UTS_LOOP; + writel(temp, sport->port.membase + uts_reg(sport)); } /* diff --git a/drivers/tty/serial/kgdb_nmi.c b/drivers/tty/serial/kgdb_nmi.c index 5dafcf1c227b..5f673b7ca50e 100644 --- a/drivers/tty/serial/kgdb_nmi.c +++ b/drivers/tty/serial/kgdb_nmi.c @@ -15,7 +15,6 @@ #include <linux/kernel.h> #include <linux/module.h> #include <linux/compiler.h> -#include <linux/init.h> #include <linux/slab.h> #include <linux/errno.h> #include <linux/atomic.h> diff --git a/drivers/tty/serial/mxs-auart.c b/drivers/tty/serial/mxs-auart.c index d8b6fee77a03..aa97fd845b4d 100644 --- a/drivers/tty/serial/mxs-auart.c +++ b/drivers/tty/serial/mxs-auart.c @@ -734,9 +734,12 @@ static void mxs_auart_reset(struct uart_port *u) static int mxs_auart_startup(struct uart_port *u) { + int ret; struct mxs_auart_port *s = to_auart_port(u); - clk_prepare_enable(s->clk); + ret = clk_prepare_enable(s->clk); + if (ret) + return ret; writel(AUART_CTRL0_CLKGATE, u->membase + AUART_CTRL0_CLR); @@ -957,7 +960,9 @@ auart_console_setup(struct console *co, char *options) if (!s) return -ENODEV; - clk_prepare_enable(s->clk); + ret = clk_prepare_enable(s->clk); + if (ret) + return ret; if (options) uart_parse_options(options, &baud, &parity, &bits, &flow); diff --git a/drivers/tty/serial/of_serial.c b/drivers/tty/serial/of_serial.c index 2caf9c6f6149..99246606a256 100644 --- a/drivers/tty/serial/of_serial.c +++ b/drivers/tty/serial/of_serial.c @@ -9,7 +9,6 @@ * 2 of the License, or (at your option) any later version. * */ -#include <linux/init.h> #include <linux/module.h> #include <linux/slab.h> #include <linux/delay.h> diff --git a/drivers/tty/serial/pch_uart.c b/drivers/tty/serial/pch_uart.c index 0aa2b528ef3d..9cbd3acaf37f 100644 --- a/drivers/tty/serial/pch_uart.c +++ b/drivers/tty/serial/pch_uart.c @@ -1853,7 +1853,6 @@ static void pch_uart_exit_port(struct eg20t_port *priv) debugfs_remove(priv->debugfs); #endif uart_remove_one_port(&pch_uart_driver, &priv->port); - pci_set_drvdata(priv->pdev, NULL); free_page((unsigned long)priv->rxbuf.buf); } @@ -1907,7 +1906,7 @@ static int pch_uart_pci_resume(struct pci_dev *pdev) #define pch_uart_pci_resume NULL #endif -static DEFINE_PCI_DEVICE_TABLE(pch_uart_pci_id) = { +static const struct pci_device_id pch_uart_pci_id[] = { {PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x8811), .driver_data = pch_et20t_uart0}, {PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x8812), diff --git a/drivers/tty/serial/pmac_zilog.c b/drivers/tty/serial/pmac_zilog.c index 481b781b26e3..e9d420ff3931 100644 --- a/drivers/tty/serial/pmac_zilog.c +++ b/drivers/tty/serial/pmac_zilog.c @@ -2052,6 +2052,9 @@ static int __init pmz_console_init(void) /* Probe ports */ pmz_probe(); + if (pmz_ports_count == 0) + return -ENODEV; + /* TODO: Autoprobe console based on OF */ /* pmz_console.index = i; */ register_console(&pmz_console); diff --git a/drivers/tty/serial/rp2.c b/drivers/tty/serial/rp2.c index 328d6deb6b08..056f91b3a4ca 100644 --- a/drivers/tty/serial/rp2.c +++ b/drivers/tty/serial/rp2.c @@ -810,7 +810,7 @@ static void rp2_remove(struct pci_dev *pdev) rp2_remove_ports(card); } -static DEFINE_PCI_DEVICE_TABLE(rp2_pci_tbl) = { +static const struct pci_device_id rp2_pci_tbl[] = { /* RocketPort INFINITY cards */ diff --git a/drivers/tty/serial/sc26xx.c b/drivers/tty/serial/sc26xx.c deleted file mode 100644 index 887b4f770749..000000000000 --- a/drivers/tty/serial/sc26xx.c +++ /dev/null @@ -1,749 +0,0 @@ -/* - * SC268xx.c: Serial driver for Philiphs SC2681/SC2692 devices. - * - * Copyright (C) 2006,2007 Thomas Bogendörfer (tsbogend@alpha.franken.de) - */ - -#include <linux/module.h> -#include <linux/kernel.h> -#include <linux/errno.h> -#include <linux/tty.h> -#include <linux/tty_flip.h> -#include <linux/major.h> -#include <linux/circ_buf.h> -#include <linux/serial.h> -#include <linux/sysrq.h> -#include <linux/console.h> -#include <linux/spinlock.h> -#include <linux/slab.h> -#include <linux/delay.h> -#include <linux/init.h> -#include <linux/platform_device.h> -#include <linux/irq.h> -#include <linux/io.h> - -#warning "Please try migrate to use new driver SCCNXP and report the status" \ - "in the linux-serial mailing list." - -#if defined(CONFIG_MAGIC_SYSRQ) -#define SUPPORT_SYSRQ -#endif - -#include <linux/serial_core.h> - -#define SC26XX_MAJOR 204 -#define SC26XX_MINOR_START 205 -#define SC26XX_NR 2 - -struct uart_sc26xx_port { - struct uart_port port[2]; - u8 dsr_mask[2]; - u8 cts_mask[2]; - u8 dcd_mask[2]; - u8 ri_mask[2]; - u8 dtr_mask[2]; - u8 rts_mask[2]; - u8 imr; -}; - -/* register common to both ports */ -#define RD_ISR 0x14 -#define RD_IPR 0x34 - -#define WR_ACR 0x10 -#define WR_IMR 0x14 -#define WR_OPCR 0x34 -#define WR_OPR_SET 0x38 -#define WR_OPR_CLR 0x3C - -/* access common register */ -#define READ_SC(p, r) readb((p)->membase + RD_##r) -#define WRITE_SC(p, r, v) writeb((v), (p)->membase + WR_##r) - -/* register per port */ -#define RD_PORT_MRx 0x00 -#define RD_PORT_SR 0x04 -#define RD_PORT_RHR 0x0c - -#define WR_PORT_MRx 0x00 -#define WR_PORT_CSR 0x04 -#define WR_PORT_CR 0x08 -#define WR_PORT_THR 0x0c - -/* SR bits */ -#define SR_BREAK (1 << 7) -#define SR_FRAME (1 << 6) -#define SR_PARITY (1 << 5) -#define SR_OVERRUN (1 << 4) -#define SR_TXRDY (1 << 2) -#define SR_RXRDY (1 << 0) - -#define CR_RES_MR (1 << 4) -#define CR_RES_RX (2 << 4) -#define CR_RES_TX (3 << 4) -#define CR_STRT_BRK (6 << 4) -#define CR_STOP_BRK (7 << 4) -#define CR_DIS_TX (1 << 3) -#define CR_ENA_TX (1 << 2) -#define CR_DIS_RX (1 << 1) -#define CR_ENA_RX (1 << 0) - -/* ISR bits */ -#define ISR_RXRDYB (1 << 5) -#define ISR_TXRDYB (1 << 4) -#define ISR_RXRDYA (1 << 1) -#define ISR_TXRDYA (1 << 0) - -/* IMR bits */ -#define IMR_RXRDY (1 << 1) -#define IMR_TXRDY (1 << 0) - -/* access port register */ -static inline u8 read_sc_port(struct uart_port *p, u8 reg) -{ - return readb(p->membase + p->line * 0x20 + reg); -} - -static inline void write_sc_port(struct uart_port *p, u8 reg, u8 val) -{ - writeb(val, p->membase + p->line * 0x20 + reg); -} - -#define READ_SC_PORT(p, r) read_sc_port(p, RD_PORT_##r) -#define WRITE_SC_PORT(p, r, v) write_sc_port(p, WR_PORT_##r, v) - -static void sc26xx_enable_irq(struct uart_port *port, int mask) -{ - struct uart_sc26xx_port *up; - int line = port->line; - - port -= line; - up = container_of(port, struct uart_sc26xx_port, port[0]); - - up->imr |= mask << (line * 4); - WRITE_SC(port, IMR, up->imr); -} - -static void sc26xx_disable_irq(struct uart_port *port, int mask) -{ - struct uart_sc26xx_port *up; - int line = port->line; - - port -= line; - up = container_of(port, struct uart_sc26xx_port, port[0]); - - up->imr &= ~(mask << (line * 4)); - WRITE_SC(port, IMR, up->imr); -} - -static bool receive_chars(struct uart_port *port) -{ - struct tty_port *tport = NULL; - int limit = 10000; - unsigned char ch; - char flag; - u8 status; - - /* FIXME what is this trying to achieve? */ - if (port->state != NULL) /* Unopened serial console */ - tport = &port->state->port; - - while (limit-- > 0) { - status = READ_SC_PORT(port, SR); - if (!(status & SR_RXRDY)) - break; - ch = READ_SC_PORT(port, RHR); - - flag = TTY_NORMAL; - port->icount.rx++; - - if (unlikely(status & (SR_BREAK | SR_FRAME | - SR_PARITY | SR_OVERRUN))) { - if (status & SR_BREAK) { - status &= ~(SR_PARITY | SR_FRAME); - port->icount.brk++; - if (uart_handle_break(port)) - continue; - } else if (status & SR_PARITY) - port->icount.parity++; - else if (status & SR_FRAME) - port->icount.frame++; - if (status & SR_OVERRUN) - port->icount.overrun++; - - status &= port->read_status_mask; - if (status & SR_BREAK) - flag = TTY_BREAK; - else if (status & SR_PARITY) - flag = TTY_PARITY; - else if (status & SR_FRAME) - flag = TTY_FRAME; - } - - if (uart_handle_sysrq_char(port, ch)) - continue; - - if (status & port->ignore_status_mask) - continue; - - tty_insert_flip_char(tport, ch, flag); - } - return !!tport; -} - -static void transmit_chars(struct uart_port *port) -{ - struct circ_buf *xmit; - - if (!port->state) - return; - - xmit = &port->state->xmit; - if (uart_circ_empty(xmit) || uart_tx_stopped(port)) { - sc26xx_disable_irq(port, IMR_TXRDY); - return; - } - while (!uart_circ_empty(xmit)) { - if (!(READ_SC_PORT(port, SR) & SR_TXRDY)) - break; - - WRITE_SC_PORT(port, THR, xmit->buf[xmit->tail]); - xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1); - port->icount.tx++; - } - if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) - uart_write_wakeup(port); -} - -static irqreturn_t sc26xx_interrupt(int irq, void *dev_id) -{ - struct uart_sc26xx_port *up = dev_id; - unsigned long flags; - bool push; - u8 isr; - - spin_lock_irqsave(&up->port[0].lock, flags); - - push = false; - isr = READ_SC(&up->port[0], ISR); - if (isr & ISR_TXRDYA) - transmit_chars(&up->port[0]); - if (isr & ISR_RXRDYA) - push = receive_chars(&up->port[0]); - - spin_unlock(&up->port[0].lock); - - if (push) - tty_flip_buffer_push(&up->port[0].state->port); - - spin_lock(&up->port[1].lock); - - push = false; - if (isr & ISR_TXRDYB) - transmit_chars(&up->port[1]); - if (isr & ISR_RXRDYB) - push = receive_chars(&up->port[1]); - - spin_unlock_irqrestore(&up->port[1].lock, flags); - - if (push) - tty_flip_buffer_push(&up->port[1].state->port); - - return IRQ_HANDLED; -} - -/* port->lock is not held. */ -static unsigned int sc26xx_tx_empty(struct uart_port *port) -{ - return (READ_SC_PORT(port, SR) & SR_TXRDY) ? TIOCSER_TEMT : 0; -} - -/* port->lock held by caller. */ -static void sc26xx_set_mctrl(struct uart_port *port, unsigned int mctrl) -{ - struct uart_sc26xx_port *up; - int line = port->line; - - port -= line; - up = container_of(port, struct uart_sc26xx_port, port[0]); - - if (up->dtr_mask[line]) { - if (mctrl & TIOCM_DTR) - WRITE_SC(port, OPR_SET, up->dtr_mask[line]); - else - WRITE_SC(port, OPR_CLR, up->dtr_mask[line]); - } - if (up->rts_mask[line]) { - if (mctrl & TIOCM_RTS) - WRITE_SC(port, OPR_SET, up->rts_mask[line]); - else - WRITE_SC(port, OPR_CLR, up->rts_mask[line]); - } -} - -/* port->lock is held by caller and interrupts are disabled. */ -static unsigned int sc26xx_get_mctrl(struct uart_port *port) -{ - struct uart_sc26xx_port *up; - int line = port->line; - unsigned int mctrl = TIOCM_DSR | TIOCM_CTS | TIOCM_CAR; - u8 ipr; - - port -= line; - up = container_of(port, struct uart_sc26xx_port, port[0]); - ipr = READ_SC(port, IPR) ^ 0xff; - - if (up->dsr_mask[line]) { - mctrl &= ~TIOCM_DSR; - mctrl |= ipr & up->dsr_mask[line] ? TIOCM_DSR : 0; - } - if (up->cts_mask[line]) { - mctrl &= ~TIOCM_CTS; - mctrl |= ipr & up->cts_mask[line] ? TIOCM_CTS : 0; - } - if (up->dcd_mask[line]) { - mctrl &= ~TIOCM_CAR; - mctrl |= ipr & up->dcd_mask[line] ? TIOCM_CAR : 0; - } - if (up->ri_mask[line]) { - mctrl &= ~TIOCM_RNG; - mctrl |= ipr & up->ri_mask[line] ? TIOCM_RNG : 0; - } - return mctrl; -} - -/* port->lock held by caller. */ -static void sc26xx_stop_tx(struct uart_port *port) -{ - return; -} - -/* port->lock held by caller. */ -static void sc26xx_start_tx(struct uart_port *port) -{ - struct circ_buf *xmit = &port->state->xmit; - - while (!uart_circ_empty(xmit)) { - if (!(READ_SC_PORT(port, SR) & SR_TXRDY)) { - sc26xx_enable_irq(port, IMR_TXRDY); - break; - } - WRITE_SC_PORT(port, THR, xmit->buf[xmit->tail]); - xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1); - port->icount.tx++; - } -} - -/* port->lock held by caller. */ -static void sc26xx_stop_rx(struct uart_port *port) -{ -} - -/* port->lock held by caller. */ -static void sc26xx_enable_ms(struct uart_port *port) -{ -} - -/* port->lock is not held. */ -static void sc26xx_break_ctl(struct uart_port *port, int break_state) -{ - if (break_state == -1) - WRITE_SC_PORT(port, CR, CR_STRT_BRK); - else - WRITE_SC_PORT(port, CR, CR_STOP_BRK); -} - -/* port->lock is not held. */ -static int sc26xx_startup(struct uart_port *port) -{ - sc26xx_disable_irq(port, IMR_TXRDY | IMR_RXRDY); - WRITE_SC(port, OPCR, 0); - - /* reset tx and rx */ - WRITE_SC_PORT(port, CR, CR_RES_RX); - WRITE_SC_PORT(port, CR, CR_RES_TX); - - /* start rx/tx */ - WRITE_SC_PORT(port, CR, CR_ENA_TX | CR_ENA_RX); - - /* enable irqs */ - sc26xx_enable_irq(port, IMR_RXRDY); - return 0; -} - -/* port->lock is not held. */ -static void sc26xx_shutdown(struct uart_port *port) -{ - /* disable interrupst */ - sc26xx_disable_irq(port, IMR_TXRDY | IMR_RXRDY); - - /* stop tx/rx */ - WRITE_SC_PORT(port, CR, CR_DIS_TX | CR_DIS_RX); -} - -/* port->lock is not held. */ -static void sc26xx_set_termios(struct uart_port *port, struct ktermios *termios, - struct ktermios *old) -{ - unsigned int baud = uart_get_baud_rate(port, termios, old, 0, 4000000); - unsigned int quot = uart_get_divisor(port, baud); - unsigned int iflag, cflag; - unsigned long flags; - u8 mr1, mr2, csr; - - spin_lock_irqsave(&port->lock, flags); - - while ((READ_SC_PORT(port, SR) & ((1 << 3) | (1 << 2))) != 0xc) - udelay(2); - - WRITE_SC_PORT(port, CR, CR_DIS_TX | CR_DIS_RX); - - iflag = termios->c_iflag; - cflag = termios->c_cflag; - - port->read_status_mask = SR_OVERRUN; - if (iflag & INPCK) - port->read_status_mask |= SR_PARITY | SR_FRAME; - if (iflag & (BRKINT | PARMRK)) - port->read_status_mask |= SR_BREAK; - - port->ignore_status_mask = 0; - if (iflag & IGNBRK) - port->ignore_status_mask |= SR_BREAK; - if ((cflag & CREAD) == 0) - port->ignore_status_mask |= SR_BREAK | SR_FRAME | - SR_PARITY | SR_OVERRUN; - - switch (cflag & CSIZE) { - case CS5: - mr1 = 0x00; - break; - case CS6: - mr1 = 0x01; - break; - case CS7: - mr1 = 0x02; - break; - default: - case CS8: - mr1 = 0x03; - break; - } - mr2 = 0x07; - if (cflag & CSTOPB) - mr2 = 0x0f; - if (cflag & PARENB) { - if (cflag & PARODD) - mr1 |= (1 << 2); - } else - mr1 |= (2 << 3); - - switch (baud) { - case 50: - csr = 0x00; - break; - case 110: - csr = 0x11; - break; - case 134: - csr = 0x22; - break; - case 200: - csr = 0x33; - break; - case 300: - csr = 0x44; - break; - case 600: - csr = 0x55; - break; - case 1200: - csr = 0x66; - break; - case 2400: - csr = 0x88; - break; - case 4800: - csr = 0x99; - break; - default: - case 9600: - csr = 0xbb; - break; - case 19200: - csr = 0xcc; - break; - } - - WRITE_SC_PORT(port, CR, CR_RES_MR); - WRITE_SC_PORT(port, MRx, mr1); - WRITE_SC_PORT(port, MRx, mr2); - - WRITE_SC(port, ACR, 0x80); - WRITE_SC_PORT(port, CSR, csr); - - /* reset tx and rx */ - WRITE_SC_PORT(port, CR, CR_RES_RX); - WRITE_SC_PORT(port, CR, CR_RES_TX); - - WRITE_SC_PORT(port, CR, CR_ENA_TX | CR_ENA_RX); - while ((READ_SC_PORT(port, SR) & ((1 << 3) | (1 << 2))) != 0xc) - udelay(2); - - /* XXX */ - uart_update_timeout(port, cflag, - (port->uartclk / (16 * quot))); - - spin_unlock_irqrestore(&port->lock, flags); -} - -static const char *sc26xx_type(struct uart_port *port) -{ - return "SC26XX"; -} - -static void sc26xx_release_port(struct uart_port *port) -{ -} - -static int sc26xx_request_port(struct uart_port *port) -{ - return 0; -} - -static void sc26xx_config_port(struct uart_port *port, int flags) -{ -} - -static int sc26xx_verify_port(struct uart_port *port, struct serial_struct *ser) -{ - return -EINVAL; -} - -static struct uart_ops sc26xx_ops = { - .tx_empty = sc26xx_tx_empty, - .set_mctrl = sc26xx_set_mctrl, - .get_mctrl = sc26xx_get_mctrl, - .stop_tx = sc26xx_stop_tx, - .start_tx = sc26xx_start_tx, - .stop_rx = sc26xx_stop_rx, - .enable_ms = sc26xx_enable_ms, - .break_ctl = sc26xx_break_ctl, - .startup = sc26xx_startup, - .shutdown = sc26xx_shutdown, - .set_termios = sc26xx_set_termios, - .type = sc26xx_type, - .release_port = sc26xx_release_port, - .request_port = sc26xx_request_port, - .config_port = sc26xx_config_port, - .verify_port = sc26xx_verify_port, -}; - -static struct uart_port *sc26xx_port; - -#ifdef CONFIG_SERIAL_SC26XX_CONSOLE -static void sc26xx_console_putchar(struct uart_port *port, char c) -{ - unsigned long flags; - int limit = 1000000; - - spin_lock_irqsave(&port->lock, flags); - - while (limit-- > 0) { - if (READ_SC_PORT(port, SR) & SR_TXRDY) { - WRITE_SC_PORT(port, THR, c); - break; - } - udelay(2); - } - - spin_unlock_irqrestore(&port->lock, flags); -} - -static void sc26xx_console_write(struct console *con, const char *s, unsigned n) -{ - struct uart_port *port = sc26xx_port; - int i; - - for (i = 0; i < n; i++) { - if (*s == '\n') - sc26xx_console_putchar(port, '\r'); - sc26xx_console_putchar(port, *s++); - } -} - -static int __init sc26xx_console_setup(struct console *con, char *options) -{ - struct uart_port *port = sc26xx_port; - int baud = 9600; - int bits = 8; - int parity = 'n'; - int flow = 'n'; - - if (port->type != PORT_SC26XX) - return -1; - - printk(KERN_INFO "Console: ttySC%d (SC26XX)\n", con->index); - if (options) - uart_parse_options(options, &baud, &parity, &bits, &flow); - - return uart_set_options(port, con, baud, parity, bits, flow); -} - -static struct uart_driver sc26xx_reg; -static struct console sc26xx_console = { - .name = "ttySC", - .write = sc26xx_console_write, - .device = uart_console_device, - .setup = sc26xx_console_setup, - .flags = CON_PRINTBUFFER, - .index = -1, - .data = &sc26xx_reg, -}; -#define SC26XX_CONSOLE &sc26xx_console -#else -#define SC26XX_CONSOLE NULL -#endif - -static struct uart_driver sc26xx_reg = { - .owner = THIS_MODULE, - .driver_name = "SC26xx", - .dev_name = "ttySC", - .major = SC26XX_MAJOR, - .minor = SC26XX_MINOR_START, - .nr = SC26XX_NR, - .cons = SC26XX_CONSOLE, -}; - -static u8 sc26xx_flags2mask(unsigned int flags, unsigned int bitpos) -{ - unsigned int bit = (flags >> bitpos) & 15; - - return bit ? (1 << (bit - 1)) : 0; -} - -static void sc26xx_init_masks(struct uart_sc26xx_port *up, - int line, unsigned int data) -{ - up->dtr_mask[line] = sc26xx_flags2mask(data, 0); - up->rts_mask[line] = sc26xx_flags2mask(data, 4); - up->dsr_mask[line] = sc26xx_flags2mask(data, 8); - up->cts_mask[line] = sc26xx_flags2mask(data, 12); - up->dcd_mask[line] = sc26xx_flags2mask(data, 16); - up->ri_mask[line] = sc26xx_flags2mask(data, 20); -} - -static int sc26xx_probe(struct platform_device *dev) -{ - struct resource *res; - struct uart_sc26xx_port *up; - unsigned int *sc26xx_data = dev_get_platdata(&dev->dev); - int err; - - res = platform_get_resource(dev, IORESOURCE_MEM, 0); - if (!res) - return -ENODEV; - - up = kzalloc(sizeof *up, GFP_KERNEL); - if (unlikely(!up)) - return -ENOMEM; - - up->port[0].line = 0; - up->port[0].ops = &sc26xx_ops; - up->port[0].type = PORT_SC26XX; - up->port[0].uartclk = (29491200 / 16); /* arbitrary */ - - up->port[0].mapbase = res->start; - up->port[0].membase = ioremap_nocache(up->port[0].mapbase, 0x40); - up->port[0].iotype = UPIO_MEM; - up->port[0].irq = platform_get_irq(dev, 0); - - up->port[0].dev = &dev->dev; - - sc26xx_init_masks(up, 0, sc26xx_data[0]); - - sc26xx_port = &up->port[0]; - - up->port[1].line = 1; - up->port[1].ops = &sc26xx_ops; - up->port[1].type = PORT_SC26XX; - up->port[1].uartclk = (29491200 / 16); /* arbitrary */ - - up->port[1].mapbase = up->port[0].mapbase; - up->port[1].membase = up->port[0].membase; - up->port[1].iotype = UPIO_MEM; - up->port[1].irq = up->port[0].irq; - - up->port[1].dev = &dev->dev; - - sc26xx_init_masks(up, 1, sc26xx_data[1]); - - err = uart_register_driver(&sc26xx_reg); - if (err) - goto out_free_port; - - sc26xx_reg.tty_driver->name_base = sc26xx_reg.minor; - - err = uart_add_one_port(&sc26xx_reg, &up->port[0]); - if (err) - goto out_unregister_driver; - - err = uart_add_one_port(&sc26xx_reg, &up->port[1]); - if (err) - goto out_remove_port0; - - err = request_irq(up->port[0].irq, sc26xx_interrupt, 0, "sc26xx", up); - if (err) - goto out_remove_ports; - - platform_set_drvdata(dev, up); - return 0; - -out_remove_ports: - uart_remove_one_port(&sc26xx_reg, &up->port[1]); -out_remove_port0: - uart_remove_one_port(&sc26xx_reg, &up->port[0]); - -out_unregister_driver: - uart_unregister_driver(&sc26xx_reg); - -out_free_port: - kfree(up); - sc26xx_port = NULL; - return err; -} - - -static int __exit sc26xx_driver_remove(struct platform_device *dev) -{ - struct uart_sc26xx_port *up = platform_get_drvdata(dev); - - free_irq(up->port[0].irq, up); - - uart_remove_one_port(&sc26xx_reg, &up->port[0]); - uart_remove_one_port(&sc26xx_reg, &up->port[1]); - - uart_unregister_driver(&sc26xx_reg); - - kfree(up); - sc26xx_port = NULL; - - return 0; -} - -static struct platform_driver sc26xx_driver = { - .probe = sc26xx_probe, - .remove = sc26xx_driver_remove, - .driver = { - .name = "SC26xx", - .owner = THIS_MODULE, - }, -}; - -module_platform_driver(sc26xx_driver); - -MODULE_AUTHOR("Thomas Bogendörfer"); -MODULE_DESCRIPTION("SC681/SC2692 serial driver"); -MODULE_VERSION("1.0"); -MODULE_LICENSE("GPL"); -MODULE_ALIAS("platform:SC26xx"); diff --git a/drivers/tty/serial/serial_core.c b/drivers/tty/serial/serial_core.c index 0f02351c9239..ece2049bd270 100644 --- a/drivers/tty/serial/serial_core.c +++ b/drivers/tty/serial/serial_core.c @@ -1830,9 +1830,13 @@ uart_set_options(struct uart_port *port, struct console *co, /* * Ensure that the serial console lock is initialised * early. + * If this port is a console, then the spinlock is already + * initialised. */ - spin_lock_init(&port->lock); - lockdep_set_class(&port->lock, &port_lock_key); + if (!(uart_console(port) && (port->cons->flags & CON_ENABLED))) { + spin_lock_init(&port->lock); + lockdep_set_class(&port->lock, &port_lock_key); + } memset(&termios, 0, sizeof(struct ktermios)); diff --git a/drivers/tty/serial/sirfsoc_uart.c b/drivers/tty/serial/sirfsoc_uart.c index f186a8fb8887..49a2ffd101a7 100644 --- a/drivers/tty/serial/sirfsoc_uart.c +++ b/drivers/tty/serial/sirfsoc_uart.c @@ -524,9 +524,11 @@ static void sirfsoc_rx_tmo_process_tl(unsigned long param) struct sirfsoc_int_status *uint_st = &sirfport->uart_reg->uart_int_st; unsigned int count; unsigned long flags; + struct dma_tx_state tx_state; spin_lock_irqsave(&sirfport->rx_lock, flags); - while (sirfport->rx_completed != sirfport->rx_issued) { + while (DMA_COMPLETE == dmaengine_tx_status(sirfport->rx_dma_chan, + sirfport->rx_dma_items[sirfport->rx_completed].cookie, &tx_state)) { sirfsoc_uart_insert_rx_buf_to_tty(sirfport, SIRFSOC_RX_DMA_BUF_SIZE); sirfport->rx_completed++; @@ -709,8 +711,10 @@ static void sirfsoc_uart_rx_dma_complete_tl(unsigned long param) struct sirfsoc_register *ureg = &sirfport->uart_reg->uart_reg; struct sirfsoc_int_en *uint_en = &sirfport->uart_reg->uart_int_en; unsigned long flags; + struct dma_tx_state tx_state; spin_lock_irqsave(&sirfport->rx_lock, flags); - while (sirfport->rx_completed != sirfport->rx_issued) { + while (DMA_COMPLETE == dmaengine_tx_status(sirfport->rx_dma_chan, + sirfport->rx_dma_items[sirfport->rx_completed].cookie, &tx_state)) { sirfsoc_uart_insert_rx_buf_to_tty(sirfport, SIRFSOC_RX_DMA_BUF_SIZE); if (rd_regl(port, ureg->sirfsoc_int_en_reg) & @@ -1033,6 +1037,16 @@ static void sirfsoc_uart_set_termios(struct uart_port *port, spin_unlock_irqrestore(&port->lock, flags); } +static void sirfsoc_uart_pm(struct uart_port *port, unsigned int state, + unsigned int oldstate) +{ + struct sirfsoc_uart_port *sirfport = to_sirfport(port); + if (!state) + clk_prepare_enable(sirfport->clk); + else + clk_disable_unprepare(sirfport->clk); +} + static unsigned int sirfsoc_uart_init_tx_dma(struct uart_port *port) { struct sirfsoc_uart_port *sirfport = to_sirfport(port); @@ -1264,6 +1278,7 @@ static struct uart_ops sirfsoc_uart_ops = { .startup = sirfsoc_uart_startup, .shutdown = sirfsoc_uart_shutdown, .set_termios = sirfsoc_uart_set_termios, + .pm = sirfsoc_uart_pm, .type = sirfsoc_uart_type, .release_port = sirfsoc_uart_release_port, .request_port = sirfsoc_uart_request_port, @@ -1486,7 +1501,6 @@ usp_no_flow_control: ret = PTR_ERR(sirfport->clk); goto err; } - clk_prepare_enable(sirfport->clk); port->uartclk = clk_get_rate(sirfport->clk); port->ops = &sirfsoc_uart_ops; @@ -1502,7 +1516,6 @@ usp_no_flow_control: return 0; port_err: - clk_disable_unprepare(sirfport->clk); clk_put(sirfport->clk); err: return ret; @@ -1512,38 +1525,42 @@ static int sirfsoc_uart_remove(struct platform_device *pdev) { struct sirfsoc_uart_port *sirfport = platform_get_drvdata(pdev); struct uart_port *port = &sirfport->port; - clk_disable_unprepare(sirfport->clk); clk_put(sirfport->clk); uart_remove_one_port(&sirfsoc_uart_drv, port); return 0; } +#ifdef CONFIG_PM_SLEEP static int -sirfsoc_uart_suspend(struct platform_device *pdev, pm_message_t state) +sirfsoc_uart_suspend(struct device *pdev) { - struct sirfsoc_uart_port *sirfport = platform_get_drvdata(pdev); + struct sirfsoc_uart_port *sirfport = dev_get_drvdata(pdev); struct uart_port *port = &sirfport->port; uart_suspend_port(&sirfsoc_uart_drv, port); return 0; } -static int sirfsoc_uart_resume(struct platform_device *pdev) +static int sirfsoc_uart_resume(struct device *pdev) { - struct sirfsoc_uart_port *sirfport = platform_get_drvdata(pdev); + struct sirfsoc_uart_port *sirfport = dev_get_drvdata(pdev); struct uart_port *port = &sirfport->port; uart_resume_port(&sirfsoc_uart_drv, port); return 0; } +#endif + +static const struct dev_pm_ops sirfsoc_uart_pm_ops = { + SET_SYSTEM_SLEEP_PM_OPS(sirfsoc_uart_suspend, sirfsoc_uart_resume) +}; static struct platform_driver sirfsoc_uart_driver = { .probe = sirfsoc_uart_probe, .remove = sirfsoc_uart_remove, - .suspend = sirfsoc_uart_suspend, - .resume = sirfsoc_uart_resume, .driver = { .name = SIRFUART_PORT_NAME, .owner = THIS_MODULE, .of_match_table = sirfsoc_uart_ids, + .pm = &sirfsoc_uart_pm_ops, }, }; diff --git a/drivers/tty/serial/xilinx_uartps.c b/drivers/tty/serial/xilinx_uartps.c index e46e9f3f19b9..f619ad5b5eae 100644 --- a/drivers/tty/serial/xilinx_uartps.c +++ b/drivers/tty/serial/xilinx_uartps.c @@ -240,6 +240,7 @@ static irqreturn_t xuartps_isr(int irq, void *dev_id) continue; } +#ifdef SUPPORT_SYSRQ /* * uart_handle_sysrq_char() doesn't work if * spinlocked, for some reason @@ -253,6 +254,7 @@ static irqreturn_t xuartps_isr(int irq, void *dev_id) } spin_lock(&port->lock); } +#endif port->icount.rx++; diff --git a/drivers/tty/synclink.c b/drivers/tty/synclink.c index e1ce141bad5e..5ae14b46cce0 100644 --- a/drivers/tty/synclink.c +++ b/drivers/tty/synclink.c @@ -3404,8 +3404,8 @@ static int mgsl_open(struct tty_struct *tty, struct file * filp) /* If port is closing, signal caller to 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); + wait_event_interruptible_tty(tty, info->port.close_wait, + !(info->port.flags & ASYNC_CLOSING)); retval = ((info->port.flags & ASYNC_HUP_NOTIFY) ? -EAGAIN : -ERESTARTSYS); goto cleanup; diff --git a/drivers/tty/synclink_gt.c b/drivers/tty/synclink_gt.c index 1abf946463f6..c359a91f7346 100644 --- a/drivers/tty/synclink_gt.c +++ b/drivers/tty/synclink_gt.c @@ -674,8 +674,8 @@ static int open(struct tty_struct *tty, struct file *filp) /* If port is closing, signal caller to 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); + wait_event_interruptible_tty(tty, info->port.close_wait, + !(info->port.flags & ASYNC_CLOSING)); retval = ((info->port.flags & ASYNC_HUP_NOTIFY) ? -EAGAIN : -ERESTARTSYS); goto cleanup; diff --git a/drivers/tty/synclinkmp.c b/drivers/tty/synclinkmp.c index dc6e96996ead..144202eef6fe 100644 --- a/drivers/tty/synclinkmp.c +++ b/drivers/tty/synclinkmp.c @@ -754,8 +754,8 @@ static int open(struct tty_struct *tty, struct file *filp) /* If port is closing, signal caller to 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); + wait_event_interruptible_tty(tty, info->port.close_wait, + !(info->port.flags & ASYNC_CLOSING)); retval = ((info->port.flags & ASYNC_HUP_NOTIFY) ? -EAGAIN : -ERESTARTSYS); goto cleanup; diff --git a/drivers/tty/tty_audit.c b/drivers/tty/tty_audit.c index a4fdce74f883..b0e540137e39 100644 --- a/drivers/tty/tty_audit.c +++ b/drivers/tty/tty_audit.c @@ -67,7 +67,7 @@ static void tty_audit_log(const char *description, int major, int minor, struct task_struct *tsk = current; uid_t uid = from_kuid(&init_user_ns, task_uid(tsk)); uid_t loginuid = from_kuid(&init_user_ns, audit_get_loginuid(tsk)); - u32 sessionid = audit_get_sessionid(tsk); + unsigned int sessionid = audit_get_sessionid(tsk); ab = audit_log_start(NULL, GFP_KERNEL, AUDIT_TTY); if (ab) { diff --git a/drivers/tty/tty_buffer.c b/drivers/tty/tty_buffer.c index c043136fbe51..765125dff20e 100644 --- a/drivers/tty/tty_buffer.c +++ b/drivers/tty/tty_buffer.c @@ -11,7 +11,6 @@ #include <linux/string.h> #include <linux/slab.h> #include <linux/sched.h> -#include <linux/init.h> #include <linux/wait.h> #include <linux/bitops.h> #include <linux/delay.h> @@ -26,7 +25,7 @@ * Byte threshold to limit memory consumption for flip buffers. * The actual memory limit is > 2x this amount. */ -#define TTYB_MEM_LIMIT 65536 +#define TTYB_DEFAULT_MEM_LIMIT 65536 /* * We default to dicing tty buffer allocations to this many characters @@ -89,9 +88,10 @@ void tty_buffer_unlock_exclusive(struct tty_port *port) int tty_buffer_space_avail(struct tty_port *port) { - int space = TTYB_MEM_LIMIT - atomic_read(&port->buf.memory_used); + int space = port->buf.mem_limit - atomic_read(&port->buf.mem_used); return max(space, 0); } +EXPORT_SYMBOL_GPL(tty_buffer_space_avail); static void tty_buffer_reset(struct tty_buffer *p, size_t size) { @@ -100,6 +100,7 @@ static void tty_buffer_reset(struct tty_buffer *p, size_t size) p->next = NULL; p->commit = 0; p->read = 0; + p->flags = 0; } /** @@ -129,7 +130,7 @@ void tty_buffer_free_all(struct tty_port *port) buf->head = &buf->sentinel; buf->tail = &buf->sentinel; - atomic_set(&buf->memory_used, 0); + atomic_set(&buf->mem_used, 0); } /** @@ -162,7 +163,7 @@ static struct tty_buffer *tty_buffer_alloc(struct tty_port *port, size_t size) /* Should possibly check if this fails for the largest buffer we have queued and recycle that ? */ - if (atomic_read(&port->buf.memory_used) > TTYB_MEM_LIMIT) + if (atomic_read(&port->buf.mem_used) > port->buf.mem_limit) return NULL; p = kmalloc(sizeof(struct tty_buffer) + 2 * size, GFP_ATOMIC); if (p == NULL) @@ -170,7 +171,7 @@ static struct tty_buffer *tty_buffer_alloc(struct tty_port *port, size_t size) found: tty_buffer_reset(p, size); - atomic_add(size, &port->buf.memory_used); + atomic_add(size, &port->buf.mem_used); return p; } @@ -188,7 +189,7 @@ static void tty_buffer_free(struct tty_port *port, struct tty_buffer *b) struct tty_bufhead *buf = &port->buf; /* Dumb strategy for now - should keep some stats */ - WARN_ON(atomic_sub_return(b->size, &buf->memory_used) < 0); + WARN_ON(atomic_sub_return(b->size, &buf->mem_used) < 0); if (b->size > MIN_TTYB_SIZE) kfree(b); @@ -200,9 +201,7 @@ static void tty_buffer_free(struct tty_port *port, struct tty_buffer *b) * tty_buffer_flush - flush full tty buffers * @tty: tty to flush * - * flush all the buffers containing receive data. If the buffer is - * being processed by flush_to_ldisc then we defer the processing - * to that function + * flush all the buffers containing receive data. * * Locking: takes buffer lock to ensure single-threaded flip buffer * 'consumer' @@ -230,31 +229,49 @@ void tty_buffer_flush(struct tty_struct *tty) * tty_buffer_request_room - grow tty buffer if needed * @tty: tty structure * @size: size desired + * @flags: buffer flags if new buffer allocated (default = 0) * * Make at least size bytes of linear space available for the tty * buffer. If we fail return the size we managed to find. + * + * Will change over to a new buffer if the current buffer is encoded as + * TTY_NORMAL (so has no flags buffer) and the new buffer requires + * a flags buffer. */ -int tty_buffer_request_room(struct tty_port *port, size_t size) +static int __tty_buffer_request_room(struct tty_port *port, size_t size, + int flags) { struct tty_bufhead *buf = &port->buf; struct tty_buffer *b, *n; - int left; + int left, change; b = buf->tail; - left = b->size - b->used; + if (b->flags & TTYB_NORMAL) + left = 2 * b->size - b->used; + else + left = b->size - b->used; - if (left < size) { + change = (b->flags & TTYB_NORMAL) && (~flags & TTYB_NORMAL); + if (change || left < size) { /* This is the slow path - looking for new buffers to use */ if ((n = tty_buffer_alloc(port, size)) != NULL) { + n->flags = flags; buf->tail = n; b->commit = b->used; smp_mb(); b->next = n; - } else + } else if (change) + size = 0; + else size = left; } return size; } + +int tty_buffer_request_room(struct tty_port *port, size_t size) +{ + return __tty_buffer_request_room(port, size, 0); +} EXPORT_SYMBOL_GPL(tty_buffer_request_room); /** @@ -274,12 +291,14 @@ int tty_insert_flip_string_fixed_flag(struct tty_port *port, int copied = 0; do { int goal = min_t(size_t, size - copied, TTY_BUFFER_PAGE); - int space = tty_buffer_request_room(port, goal); + int flags = (flag == TTY_NORMAL) ? TTYB_NORMAL : 0; + int space = __tty_buffer_request_room(port, goal, flags); struct tty_buffer *tb = port->buf.tail; if (unlikely(space == 0)) break; memcpy(char_buf_ptr(tb, tb->used), chars, space); - memset(flag_buf_ptr(tb, tb->used), flag, space); + if (~tb->flags & TTYB_NORMAL) + memset(flag_buf_ptr(tb, tb->used), flag, space); tb->used += space; copied += space; chars += space; @@ -362,52 +381,28 @@ EXPORT_SYMBOL(tty_schedule_flip); int tty_prepare_flip_string(struct tty_port *port, unsigned char **chars, size_t size) { - int space = tty_buffer_request_room(port, size); + int space = __tty_buffer_request_room(port, size, TTYB_NORMAL); if (likely(space)) { struct tty_buffer *tb = port->buf.tail; *chars = char_buf_ptr(tb, tb->used); - memset(flag_buf_ptr(tb, tb->used), TTY_NORMAL, space); + if (~tb->flags & TTYB_NORMAL) + memset(flag_buf_ptr(tb, tb->used), TTY_NORMAL, space); tb->used += space; } return space; } EXPORT_SYMBOL_GPL(tty_prepare_flip_string); -/** - * tty_prepare_flip_string_flags - make room for characters - * @port: tty port - * @chars: return pointer for character write area - * @flags: return pointer for status flag write area - * @size: desired size - * - * Prepare a block of space in the buffer for data. Returns the length - * available and buffer pointer to the space which is now allocated and - * accounted for as ready for characters. This is used for drivers - * that need their own block copy routines into the buffer. There is no - * guarantee the buffer is a DMA target! - */ - -int tty_prepare_flip_string_flags(struct tty_port *port, - unsigned char **chars, char **flags, size_t size) -{ - int space = tty_buffer_request_room(port, size); - if (likely(space)) { - struct tty_buffer *tb = port->buf.tail; - *chars = char_buf_ptr(tb, tb->used); - *flags = flag_buf_ptr(tb, tb->used); - tb->used += space; - } - return space; -} -EXPORT_SYMBOL_GPL(tty_prepare_flip_string_flags); - static int receive_buf(struct tty_struct *tty, struct tty_buffer *head, int count) { struct tty_ldisc *disc = tty->ldisc; unsigned char *p = char_buf_ptr(head, head->read); - char *f = flag_buf_ptr(head, head->read); + char *f = NULL; + + if (~head->flags & TTYB_NORMAL) + f = flag_buf_ptr(head, head->read); if (disc->ops->receive_buf2) count = disc->ops->receive_buf2(tty, p, f, count); @@ -533,7 +528,25 @@ void tty_buffer_init(struct tty_port *port) buf->head = &buf->sentinel; buf->tail = &buf->sentinel; init_llist_head(&buf->free); - atomic_set(&buf->memory_used, 0); + atomic_set(&buf->mem_used, 0); atomic_set(&buf->priority, 0); INIT_WORK(&buf->work, flush_to_ldisc); + buf->mem_limit = TTYB_DEFAULT_MEM_LIMIT; +} + +/** + * tty_buffer_set_limit - change the tty buffer memory limit + * @port: tty port to change + * + * Change the tty buffer memory limit. + * Must be called before the other tty buffer functions are used. + */ + +int tty_buffer_set_limit(struct tty_port *port, int limit) +{ + if (limit < MIN_TTYB_SIZE) + return -EINVAL; + port->buf.mem_limit = limit; + return 0; } +EXPORT_SYMBOL_GPL(tty_buffer_set_limit); diff --git a/drivers/tty/tty_io.c b/drivers/tty/tty_io.c index 3a1a01af9a80..c74a00ad7add 100644 --- a/drivers/tty/tty_io.c +++ b/drivers/tty/tty_io.c @@ -2086,6 +2086,7 @@ retry_open: filp->f_op = &tty_fops; goto retry_open; } + clear_bit(TTY_HUPPED, &tty->flags); tty_unlock(tty); diff --git a/drivers/tty/tty_ldisc.c b/drivers/tty/tty_ldisc.c index 6458e11e8e9d..2d822aa259b2 100644 --- a/drivers/tty/tty_ldisc.c +++ b/drivers/tty/tty_ldisc.c @@ -11,7 +11,6 @@ #include <linux/slab.h> #include <linux/poll.h> #include <linux/proc_fs.h> -#include <linux/init.h> #include <linux/module.h> #include <linux/device.h> #include <linux/wait.h> diff --git a/drivers/tty/tty_ldsem.c b/drivers/tty/tty_ldsem.c index 22fad8ad5ac2..d8a55e87877f 100644 --- a/drivers/tty/tty_ldsem.c +++ b/drivers/tty/tty_ldsem.c @@ -86,11 +86,21 @@ static inline long ldsem_atomic_update(long delta, struct ld_semaphore *sem) return atomic_long_add_return(delta, (atomic_long_t *)&sem->count); } +/* + * ldsem_cmpxchg() updates @*old with the last-known sem->count value. + * Returns 1 if count was successfully changed; @*old will have @new value. + * Returns 0 if count was not changed; @*old will have most recent sem->count + */ static inline int ldsem_cmpxchg(long *old, long new, struct ld_semaphore *sem) { - long tmp = *old; - *old = atomic_long_cmpxchg(&sem->count, *old, new); - return *old == tmp; + long tmp = atomic_long_cmpxchg(&sem->count, *old, new); + if (tmp == *old) { + *old = new; + return 1; + } else { + *old = tmp; + return 0; + } } /* diff --git a/drivers/tty/tty_port.c b/drivers/tty/tty_port.c index c94d2349dd06..3f746c8eb0dd 100644 --- a/drivers/tty/tty_port.c +++ b/drivers/tty/tty_port.c @@ -12,7 +12,6 @@ #include <linux/string.h> #include <linux/slab.h> #include <linux/sched.h> -#include <linux/init.h> #include <linux/wait.h> #include <linux/bitops.h> #include <linux/delay.h> |