diff options
Diffstat (limited to 'drivers/tty')
39 files changed, 574 insertions, 386 deletions
diff --git a/drivers/tty/Kconfig b/drivers/tty/Kconfig index cc2b4d9433ed..b811442c5ce6 100644 --- a/drivers/tty/Kconfig +++ b/drivers/tty/Kconfig @@ -394,10 +394,14 @@ config GOLDFISH_TTY depends on GOLDFISH select SERIAL_CORE select SERIAL_CORE_CONSOLE - select SERIAL_EARLYCON help Console and system TTY driver for the Goldfish virtual platform. +config GOLDFISH_TTY_EARLY_CONSOLE + bool + default y if GOLDFISH_TTY=y + select SERIAL_EARLYCON + config DA_TTY bool "DA TTY" depends on METAG_DA diff --git a/drivers/tty/goldfish.c b/drivers/tty/goldfish.c index 7f657bb5113c..1c1bd0afcd48 100644 --- a/drivers/tty/goldfish.c +++ b/drivers/tty/goldfish.c @@ -433,6 +433,7 @@ static int goldfish_tty_remove(struct platform_device *pdev) return 0; } +#ifdef CONFIG_GOLDFISH_TTY_EARLY_CONSOLE static void gf_early_console_putchar(struct uart_port *port, int ch) { __raw_writel(ch, port->membase); @@ -456,6 +457,7 @@ static int __init gf_earlycon_setup(struct earlycon_device *device, } OF_EARLYCON_DECLARE(early_gf_tty, "google,goldfish-tty", gf_earlycon_setup); +#endif static const struct of_device_id goldfish_tty_of_match[] = { { .compatible = "google,goldfish-tty", }, diff --git a/drivers/tty/isicom.c b/drivers/tty/isicom.c index 015686ff4825..bdd3027ef01b 100644 --- a/drivers/tty/isicom.c +++ b/drivers/tty/isicom.c @@ -219,13 +219,9 @@ static struct isi_port isi_ports[PORT_COUNT]; static int WaitTillCardIsFree(unsigned long base) { unsigned int count = 0; - unsigned int a = in_atomic(); /* do we run under spinlock? */ while (!(inw(base + 0xe) & 0x1) && count++ < 100) - if (a) - mdelay(1); - else - msleep(1); + mdelay(1); return !(inw(base + 0xe) & 0x1); } diff --git a/drivers/tty/moxa.c b/drivers/tty/moxa.c index 68cbc03aab4b..250a19f042d7 100644 --- a/drivers/tty/moxa.c +++ b/drivers/tty/moxa.c @@ -1487,8 +1487,6 @@ static void moxa_set_tty_param(struct tty_struct *tty, struct ktermios *old_term if (ts->c_iflag & IXANY) xany = 1; - /* Clear the features we don't support */ - ts->c_cflag &= ~CMSPAR; MoxaPortFlowCtrl(ch, rts, cts, txflow, rxflow, xany); baud = MoxaPortSetTermio(ch, ts, tty_get_baud_rate(tty)); if (baud == -1) @@ -1781,10 +1779,17 @@ static int MoxaPortSetTermio(struct moxa_port *port, struct ktermios *termio, mode |= MX_STOP1; if (termio->c_cflag & PARENB) { - if (termio->c_cflag & PARODD) - mode |= MX_PARODD; - else - mode |= MX_PAREVEN; + if (termio->c_cflag & PARODD) { + if (termio->c_cflag & CMSPAR) + mode |= MX_PARMARK; + else + mode |= MX_PARODD; + } else { + if (termio->c_cflag & CMSPAR) + mode |= MX_PARSPACE; + else + mode |= MX_PAREVEN; + } } else mode |= MX_PARNONE; diff --git a/drivers/tty/moxa.h b/drivers/tty/moxa.h index 8ce89fd36c7b..563d2dce80b3 100644 --- a/drivers/tty/moxa.h +++ b/drivers/tty/moxa.h @@ -301,5 +301,7 @@ #define MX_PARNONE 0x00 #define MX_PAREVEN 0x40 #define MX_PARODD 0xC0 +#define MX_PARMARK 0xA0 +#define MX_PARSPACE 0x20 #endif diff --git a/drivers/tty/n_gsm.c b/drivers/tty/n_gsm.c index 5131bdc9e765..3b3e1f6632d7 100644 --- a/drivers/tty/n_gsm.c +++ b/drivers/tty/n_gsm.c @@ -1451,6 +1451,10 @@ static void gsm_dlci_open(struct gsm_dlci *dlci) * in which case an opening port goes back to closed and a closing port * is simply put into closed state (any further frames from the other * end will get a DM response) + * + * Some control dlci can stay in ADM mode with other dlci working just + * fine. In that case we can just keep the control dlci open after the + * DLCI_OPENING retries time out. */ static void gsm_dlci_t1(struct timer_list *t) @@ -1464,8 +1468,15 @@ static void gsm_dlci_t1(struct timer_list *t) if (dlci->retries) { gsm_command(dlci->gsm, dlci->addr, SABM|PF); mod_timer(&dlci->t1, jiffies + gsm->t1 * HZ / 100); - } else + } else if (!dlci->addr && gsm->control == (DM | PF)) { + if (debug & 8) + pr_info("DLCI %d opening in ADM mode.\n", + dlci->addr); + gsm_dlci_open(dlci); + } else { gsm_dlci_close(dlci); + } + break; case DLCI_CLOSING: dlci->retries--; @@ -1483,8 +1494,8 @@ static void gsm_dlci_t1(struct timer_list *t) * @dlci: DLCI to open * * Commence opening a DLCI from the Linux side. We issue SABM messages - * to the modem which should then reply with a UA, at which point we - * will move into open state. Opening is done asynchronously with retry + * to the modem which should then reply with a UA or ADM, at which point + * we will move into open state. Opening is done asynchronously with retry * running off timers and the responses. */ @@ -2457,20 +2468,20 @@ static ssize_t gsmld_write(struct tty_struct *tty, struct file *file, * Called without the kernel lock held - fine */ -static unsigned int gsmld_poll(struct tty_struct *tty, struct file *file, +static __poll_t gsmld_poll(struct tty_struct *tty, struct file *file, poll_table *wait) { - unsigned int mask = 0; + __poll_t mask = 0; struct gsm_mux *gsm = tty->disc_data; poll_wait(file, &tty->read_wait, wait); poll_wait(file, &tty->write_wait, wait); if (tty_hung_up_p(file)) - mask |= POLLHUP; + mask |= EPOLLHUP; if (!tty_is_writelocked(tty) && tty_write_room(tty) > 0) - mask |= POLLOUT | POLLWRNORM; + mask |= EPOLLOUT | EPOLLWRNORM; if (gsm->dead) - mask |= POLLHUP; + mask |= EPOLLHUP; return mask; } @@ -2955,7 +2966,6 @@ static int gsmtty_open(struct tty_struct *tty, struct file *filp) static void gsmtty_close(struct tty_struct *tty, struct file *filp) { struct gsm_dlci *dlci = tty->driver_data; - struct gsm_mux *gsm; if (dlci == NULL) return; @@ -2964,7 +2974,6 @@ static void gsmtty_close(struct tty_struct *tty, struct file *filp) mutex_lock(&dlci->mutex); gsm_destroy_network(dlci); mutex_unlock(&dlci->mutex); - gsm = dlci->gsm; if (tty_port_close_start(&dlci->port, tty, filp) == 0) return; gsm_dlci_begin_close(dlci); diff --git a/drivers/tty/n_hdlc.c b/drivers/tty/n_hdlc.c index eea7b6cb3cc4..dabb391909aa 100644 --- a/drivers/tty/n_hdlc.c +++ b/drivers/tty/n_hdlc.c @@ -180,7 +180,7 @@ static ssize_t n_hdlc_tty_write(struct tty_struct *tty, struct file *file, const unsigned char *buf, size_t nr); static int n_hdlc_tty_ioctl(struct tty_struct *tty, struct file *file, unsigned int cmd, unsigned long arg); -static unsigned int n_hdlc_tty_poll(struct tty_struct *tty, struct file *filp, +static __poll_t n_hdlc_tty_poll(struct tty_struct *tty, struct file *filp, poll_table *wait); static int n_hdlc_tty_open(struct tty_struct *tty); static void n_hdlc_tty_close(struct tty_struct *tty); @@ -796,11 +796,11 @@ static int n_hdlc_tty_ioctl(struct tty_struct *tty, struct file *file, * to caller. * Returns a bit mask containing info on which ops will not block. */ -static unsigned int n_hdlc_tty_poll(struct tty_struct *tty, struct file *filp, +static __poll_t n_hdlc_tty_poll(struct tty_struct *tty, struct file *filp, poll_table *wait) { struct n_hdlc *n_hdlc = tty2n_hdlc (tty); - unsigned int mask = 0; + __poll_t mask = 0; if (debuglevel >= DEBUG_LEVEL_INFO) printk("%s(%d)n_hdlc_tty_poll() called\n",__FILE__,__LINE__); @@ -814,14 +814,14 @@ static unsigned int n_hdlc_tty_poll(struct tty_struct *tty, struct file *filp, /* set bits for operations that won't block */ if (!list_empty(&n_hdlc->rx_buf_list.list)) - mask |= POLLIN | POLLRDNORM; /* readable */ + mask |= EPOLLIN | EPOLLRDNORM; /* readable */ if (test_bit(TTY_OTHER_CLOSED, &tty->flags)) - mask |= POLLHUP; + mask |= EPOLLHUP; if (tty_hung_up_p(filp)) - mask |= POLLHUP; + mask |= EPOLLHUP; if (!tty_is_writelocked(tty) && !list_empty(&n_hdlc->tx_free_buf_list.list)) - mask |= POLLOUT | POLLWRNORM; /* writable */ + mask |= EPOLLOUT | EPOLLWRNORM; /* writable */ } return mask; } /* end of n_hdlc_tty_poll() */ diff --git a/drivers/tty/n_r3964.c b/drivers/tty/n_r3964.c index 30bb0900cd2f..dbf1ab36758e 100644 --- a/drivers/tty/n_r3964.c +++ b/drivers/tty/n_r3964.c @@ -135,7 +135,7 @@ static ssize_t r3964_write(struct tty_struct *tty, struct file *file, static int r3964_ioctl(struct tty_struct *tty, struct file *file, unsigned int cmd, unsigned long arg); static void r3964_set_termios(struct tty_struct *tty, struct ktermios *old); -static unsigned int r3964_poll(struct tty_struct *tty, struct file *file, +static __poll_t r3964_poll(struct tty_struct *tty, struct file *file, struct poll_table_struct *wait); static void r3964_receive_buf(struct tty_struct *tty, const unsigned char *cp, char *fp, int count); @@ -1216,14 +1216,14 @@ static void r3964_set_termios(struct tty_struct *tty, struct ktermios *old) } /* Called without the kernel lock held - fine */ -static unsigned int r3964_poll(struct tty_struct *tty, struct file *file, +static __poll_t r3964_poll(struct tty_struct *tty, struct file *file, struct poll_table_struct *wait) { struct r3964_info *pInfo = tty->disc_data; struct r3964_client_info *pClient; struct r3964_message *pMsg = NULL; unsigned long flags; - int result = POLLOUT; + __poll_t result = EPOLLOUT; TRACE_L("POLL"); @@ -1234,7 +1234,7 @@ static unsigned int r3964_poll(struct tty_struct *tty, struct file *file, pMsg = pClient->first_msg; spin_unlock_irqrestore(&pInfo->lock, flags); if (pMsg) - result |= POLLIN | POLLRDNORM; + result |= EPOLLIN | EPOLLRDNORM; } else { result = -EINVAL; } diff --git a/drivers/tty/n_tty.c b/drivers/tty/n_tty.c index 539b49adb6af..5c0e59e8fe46 100644 --- a/drivers/tty/n_tty.c +++ b/drivers/tty/n_tty.c @@ -1344,7 +1344,7 @@ handle_newline: put_tty_queue(c, ldata); smp_store_release(&ldata->canon_head, ldata->read_head); kill_fasync(&tty->fasync, SIGIO, POLL_IN); - wake_up_interruptible_poll(&tty->read_wait, POLLIN); + wake_up_interruptible_poll(&tty->read_wait, EPOLLIN); return 0; } } @@ -1625,7 +1625,7 @@ static void __receive_buf(struct tty_struct *tty, const unsigned char *cp, if (read_cnt(ldata)) { kill_fasync(&tty->fasync, SIGIO, POLL_IN); - wake_up_interruptible_poll(&tty->read_wait, POLLIN); + wake_up_interruptible_poll(&tty->read_wait, EPOLLIN); } } @@ -2368,30 +2368,30 @@ break_out: * Called without the kernel lock held - fine */ -static unsigned int n_tty_poll(struct tty_struct *tty, struct file *file, +static __poll_t n_tty_poll(struct tty_struct *tty, struct file *file, poll_table *wait) { - unsigned int mask = 0; + __poll_t mask = 0; poll_wait(file, &tty->read_wait, wait); poll_wait(file, &tty->write_wait, wait); if (input_available_p(tty, 1)) - mask |= POLLIN | POLLRDNORM; + mask |= EPOLLIN | EPOLLRDNORM; else { tty_buffer_flush_work(tty->port); if (input_available_p(tty, 1)) - mask |= POLLIN | POLLRDNORM; + mask |= EPOLLIN | EPOLLRDNORM; } if (tty->packet && tty->link->ctrl_status) - mask |= POLLPRI | POLLIN | POLLRDNORM; + mask |= EPOLLPRI | EPOLLIN | EPOLLRDNORM; if (test_bit(TTY_OTHER_CLOSED, &tty->flags)) - mask |= POLLHUP; + mask |= EPOLLHUP; if (tty_hung_up_p(file)) - mask |= POLLHUP; + mask |= EPOLLHUP; if (tty->ops->write && !tty_is_writelocked(tty) && tty_chars_in_buffer(tty) < WAKEUP_CHARS && tty_write_room(tty) > 0) - mask |= POLLOUT | POLLWRNORM; + mask |= EPOLLOUT | EPOLLWRNORM; return mask; } diff --git a/drivers/tty/pty.c b/drivers/tty/pty.c index 64338442050e..6c7151edd715 100644 --- a/drivers/tty/pty.c +++ b/drivers/tty/pty.c @@ -344,7 +344,7 @@ static void pty_start(struct tty_struct *tty) tty->ctrl_status &= ~TIOCPKT_STOP; tty->ctrl_status |= TIOCPKT_START; spin_unlock_irqrestore(&tty->ctrl_lock, flags); - wake_up_interruptible_poll(&tty->link->read_wait, POLLIN); + wake_up_interruptible_poll(&tty->link->read_wait, EPOLLIN); } } @@ -357,7 +357,7 @@ static void pty_stop(struct tty_struct *tty) tty->ctrl_status &= ~TIOCPKT_START; tty->ctrl_status |= TIOCPKT_STOP; spin_unlock_irqrestore(&tty->ctrl_lock, flags); - wake_up_interruptible_poll(&tty->link->read_wait, POLLIN); + wake_up_interruptible_poll(&tty->link->read_wait, EPOLLIN); } } diff --git a/drivers/tty/serdev/core.c b/drivers/tty/serdev/core.c index 1bef39828ca7..f439c72b9e3c 100644 --- a/drivers/tty/serdev/core.c +++ b/drivers/tty/serdev/core.c @@ -19,6 +19,38 @@ static bool is_registered; static DEFINE_IDA(ctrl_ida); +static ssize_t modalias_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + int len; + + len = acpi_device_modalias(dev, buf, PAGE_SIZE - 1); + if (len != -ENODEV) + return len; + + return of_device_modalias(dev, buf, PAGE_SIZE); +} +static DEVICE_ATTR_RO(modalias); + +static struct attribute *serdev_device_attrs[] = { + &dev_attr_modalias.attr, + NULL, +}; +ATTRIBUTE_GROUPS(serdev_device); + +static int serdev_device_uevent(struct device *dev, struct kobj_uevent_env *env) +{ + int rc; + + /* TODO: platform modalias */ + + rc = acpi_device_uevent_modalias(dev, env); + if (rc != -ENODEV) + return rc; + + return of_device_uevent_modalias(dev, env); +} + static void serdev_device_release(struct device *dev) { struct serdev_device *serdev = to_serdev_device(dev); @@ -26,9 +58,16 @@ static void serdev_device_release(struct device *dev) } static const struct device_type serdev_device_type = { + .groups = serdev_device_groups, + .uevent = serdev_device_uevent, .release = serdev_device_release, }; +static bool is_serdev_device(const struct device *dev) +{ + return dev->type == &serdev_device_type; +} + static void serdev_ctrl_release(struct device *dev) { struct serdev_controller *ctrl = to_serdev_controller(dev); @@ -42,6 +81,9 @@ static const struct device_type serdev_ctrl_type = { static int serdev_device_match(struct device *dev, struct device_driver *drv) { + if (!is_serdev_device(dev)) + return 0; + /* TODO: platform matching */ if (acpi_driver_match_device(dev, drv)) return 1; @@ -49,18 +91,6 @@ static int serdev_device_match(struct device *dev, struct device_driver *drv) return of_driver_match_device(dev, drv); } -static int serdev_uevent(struct device *dev, struct kobj_uevent_env *env) -{ - int rc; - - /* TODO: platform modalias */ - rc = acpi_device_uevent_modalias(dev, env); - if (rc != -ENODEV) - return rc; - - return of_device_uevent_modalias(dev, env); -} - /** * serdev_device_add() - add a device previously constructed via serdev_device_alloc() * @serdev: serdev_device to be added @@ -132,6 +162,33 @@ void serdev_device_close(struct serdev_device *serdev) } EXPORT_SYMBOL_GPL(serdev_device_close); +static void devm_serdev_device_release(struct device *dev, void *dr) +{ + serdev_device_close(*(struct serdev_device **)dr); +} + +int devm_serdev_device_open(struct device *dev, struct serdev_device *serdev) +{ + struct serdev_device **dr; + int ret; + + dr = devres_alloc(devm_serdev_device_release, sizeof(*dr), GFP_KERNEL); + if (!dr) + return -ENOMEM; + + ret = serdev_device_open(serdev); + if (ret) { + devres_free(dr); + return ret; + } + + *dr = serdev; + devres_add(dev, dr); + + return 0; +} +EXPORT_SYMBOL_GPL(devm_serdev_device_open); + void serdev_device_write_wakeup(struct serdev_device *serdev) { complete(&serdev->write_comp); @@ -225,6 +282,18 @@ void serdev_device_set_flow_control(struct serdev_device *serdev, bool enable) } EXPORT_SYMBOL_GPL(serdev_device_set_flow_control); +int serdev_device_set_parity(struct serdev_device *serdev, + enum serdev_parity parity) +{ + struct serdev_controller *ctrl = serdev->ctrl; + + if (!ctrl || !ctrl->ops->set_parity) + return -ENOTSUPP; + + return ctrl->ops->set_parity(ctrl, parity); +} +EXPORT_SYMBOL_GPL(serdev_device_set_parity); + void serdev_device_wait_until_sent(struct serdev_device *serdev, long timeout) { struct serdev_controller *ctrl = serdev->ctrl; @@ -268,37 +337,16 @@ static int serdev_drv_probe(struct device *dev) static int serdev_drv_remove(struct device *dev) { const struct serdev_device_driver *sdrv = to_serdev_device_driver(dev->driver); - - sdrv->remove(to_serdev_device(dev)); + if (sdrv->remove) + sdrv->remove(to_serdev_device(dev)); return 0; } -static ssize_t modalias_show(struct device *dev, - struct device_attribute *attr, char *buf) -{ - int len; - - len = acpi_device_modalias(dev, buf, PAGE_SIZE - 1); - if (len != -ENODEV) - return len; - - return of_device_modalias(dev, buf, PAGE_SIZE); -} -DEVICE_ATTR_RO(modalias); - -static struct attribute *serdev_device_attrs[] = { - &dev_attr_modalias.attr, - NULL, -}; -ATTRIBUTE_GROUPS(serdev_device); - static struct bus_type serdev_bus_type = { .name = "serial", .match = serdev_device_match, .probe = serdev_drv_probe, .remove = serdev_drv_remove, - .uevent = serdev_uevent, - .dev_groups = serdev_device_groups, }; /** diff --git a/drivers/tty/serdev/serdev-ttyport.c b/drivers/tty/serdev/serdev-ttyport.c index 247788a16f0b..fa1672993b4c 100644 --- a/drivers/tty/serdev/serdev-ttyport.c +++ b/drivers/tty/serdev/serdev-ttyport.c @@ -59,7 +59,8 @@ static void ttyport_write_wakeup(struct tty_port *port) test_bit(SERPORT_ACTIVE, &serport->flags)) serdev_controller_write_wakeup(ctrl); - wake_up_interruptible_poll(&tty->write_wait, POLLOUT); + /* Wake up any tty_wait_until_sent() */ + wake_up_interruptible(&tty->write_wait); tty_kref_put(tty); } @@ -122,6 +123,8 @@ static int ttyport_open(struct serdev_controller *ctrl) if (ret) goto err_close; + tty_unlock(serport->tty); + /* Bring the UART into a known 8 bits no parity hw fc state */ ktermios = tty->termios; ktermios.c_iflag &= ~(IGNBRK | BRKINT | PARMRK | ISTRIP | @@ -131,11 +134,12 @@ static int ttyport_open(struct serdev_controller *ctrl) ktermios.c_cflag &= ~(CSIZE | PARENB); ktermios.c_cflag |= CS8; ktermios.c_cflag |= CRTSCTS; + /* Hangups are not supported so make sure to ignore carrier detect. */ + ktermios.c_cflag |= CLOCAL; tty_set_termios(tty, &ktermios); set_bit(SERPORT_ACTIVE, &serport->flags); - tty_unlock(serport->tty); return 0; err_close: @@ -190,6 +194,29 @@ static void ttyport_set_flow_control(struct serdev_controller *ctrl, bool enable tty_set_termios(tty, &ktermios); } +static int ttyport_set_parity(struct serdev_controller *ctrl, + enum serdev_parity parity) +{ + struct serport *serport = serdev_controller_get_drvdata(ctrl); + struct tty_struct *tty = serport->tty; + struct ktermios ktermios = tty->termios; + + ktermios.c_cflag &= ~(PARENB | PARODD | CMSPAR); + if (parity != SERDEV_PARITY_NONE) { + ktermios.c_cflag |= PARENB; + if (parity == SERDEV_PARITY_ODD) + ktermios.c_cflag |= PARODD; + } + + tty_set_termios(tty, &ktermios); + + if ((tty->termios.c_cflag & (PARENB | PARODD | CMSPAR)) != + (ktermios.c_cflag & (PARENB | PARODD | CMSPAR))) + return -EINVAL; + + return 0; +} + static void ttyport_wait_until_sent(struct serdev_controller *ctrl, long timeout) { struct serport *serport = serdev_controller_get_drvdata(ctrl); @@ -227,6 +254,7 @@ static const struct serdev_controller_ops ctrl_ops = { .open = ttyport_open, .close = ttyport_close, .set_flow_control = ttyport_set_flow_control, + .set_parity = ttyport_set_parity, .set_baudrate = ttyport_set_baudrate, .wait_until_sent = ttyport_wait_until_sent, .get_tiocm = ttyport_get_tiocm, diff --git a/drivers/tty/serial/8250/8250_dw.c b/drivers/tty/serial/8250/8250_dw.c index 5bb0c42c88dd..cd1b94a0f451 100644 --- a/drivers/tty/serial/8250/8250_dw.c +++ b/drivers/tty/serial/8250/8250_dw.c @@ -252,31 +252,25 @@ static void dw8250_set_termios(struct uart_port *p, struct ktermios *termios, struct ktermios *old) { unsigned int baud = tty_termios_baud_rate(termios); - unsigned int target_rate, min_rate, max_rate; struct dw8250_data *d = p->private_data; long rate; - int i, ret; + int ret; if (IS_ERR(d->clk) || !old) goto out; - /* Find a clk rate within +/-1.6% of an integer multiple of baudx16 */ - target_rate = baud * 16; - min_rate = target_rate - (target_rate >> 6); - max_rate = target_rate + (target_rate >> 6); - - for (i = 1; i <= UART_DIV_MAX; i++) { - rate = clk_round_rate(d->clk, i * target_rate); - if (rate >= i * min_rate && rate <= i * max_rate) - break; - } - if (i <= UART_DIV_MAX) { - clk_disable_unprepare(d->clk); + clk_disable_unprepare(d->clk); + rate = clk_round_rate(d->clk, baud * 16); + if (rate < 0) + ret = rate; + else if (rate == 0) + ret = -ENOENT; + else ret = clk_set_rate(d->clk, rate); - clk_prepare_enable(d->clk); - if (!ret) - p->uartclk = rate; - } + clk_prepare_enable(d->clk); + + if (!ret) + p->uartclk = rate; out: p->status &= ~UPSTAT_AUTOCTS; @@ -515,7 +509,8 @@ static int dw8250_probe(struct platform_device *pdev) /* If no clock rate is defined, fail. */ if (!p->uartclk) { dev_err(dev, "clock rate not defined\n"); - return -EINVAL; + err = -EINVAL; + goto err_clk; } data->pclk = devm_clk_get(dev, "apb_pclk"); diff --git a/drivers/tty/serial/8250/8250_exar.c b/drivers/tty/serial/8250/8250_exar.c index a402878c9f30..38af306ca0e8 100644 --- a/drivers/tty/serial/8250/8250_exar.c +++ b/drivers/tty/serial/8250/8250_exar.c @@ -34,6 +34,7 @@ #define PCI_DEVICE_ID_EXAR_XR17V4358 0x4358 #define PCI_DEVICE_ID_EXAR_XR17V8358 0x8358 +#define UART_EXAR_INT0 0x80 #define UART_EXAR_8XMODE 0x88 /* 8X sampling rate select */ #define UART_EXAR_FCTR 0x08 /* Feature Control Register */ @@ -121,6 +122,7 @@ struct exar8250_board { struct exar8250 { unsigned int nr; struct exar8250_board *board; + void __iomem *virt; int line[0]; }; @@ -131,12 +133,9 @@ static int default_setup(struct exar8250 *priv, struct pci_dev *pcidev, const struct exar8250_board *board = priv->board; unsigned int bar = 0; - if (!pcim_iomap_table(pcidev)[bar] && !pcim_iomap(pcidev, bar, 0)) - return -ENOMEM; - port->port.iotype = UPIO_MEM; port->port.mapbase = pci_resource_start(pcidev, bar) + offset; - port->port.membase = pcim_iomap_table(pcidev)[bar] + offset; + port->port.membase = priv->virt + offset; port->port.regshift = board->reg_shift; return 0; @@ -420,6 +419,25 @@ static void pci_xr17v35x_exit(struct pci_dev *pcidev) port->port.private_data = NULL; } +/* + * These Exar UARTs have an extra interrupt indicator that could fire for a + * few interrupts that are not presented/cleared through IIR. One of which is + * a wakeup interrupt when coming out of sleep. These interrupts are only + * cleared by reading global INT0 or INT1 registers as interrupts are + * associated with channel 0. The INT[3:0] registers _are_ accessible from each + * channel's address space, but for the sake of bus efficiency we register a + * dedicated handler at the PCI device level to handle them. + */ +static irqreturn_t exar_misc_handler(int irq, void *data) +{ + struct exar8250 *priv = data; + + /* Clear all PCI interrupts by reading INT0. No effect on IIR */ + ioread8(priv->virt + UART_EXAR_INT0); + + return IRQ_HANDLED; +} + static int exar_pci_probe(struct pci_dev *pcidev, const struct pci_device_id *ent) { @@ -448,6 +466,9 @@ exar_pci_probe(struct pci_dev *pcidev, const struct pci_device_id *ent) return -ENOMEM; priv->board = board; + priv->virt = pcim_iomap(pcidev, bar, 0); + if (!priv->virt) + return -ENOMEM; pci_set_master(pcidev); @@ -461,6 +482,11 @@ exar_pci_probe(struct pci_dev *pcidev, const struct pci_device_id *ent) uart.port.irq = pci_irq_vector(pcidev, 0); uart.port.dev = &pcidev->dev; + rc = devm_request_irq(&pcidev->dev, uart.port.irq, exar_misc_handler, + IRQF_SHARED, "exar_uart", priv); + if (rc) + return rc; + for (i = 0; i < nr_ports && i < maxnr; i++) { rc = board->setup(priv, pcidev, &uart, i); if (rc) { diff --git a/drivers/tty/serial/8250/8250_ingenic.c b/drivers/tty/serial/8250/8250_ingenic.c index 6af84900870e..15a8c8dfa92b 100644 --- a/drivers/tty/serial/8250/8250_ingenic.c +++ b/drivers/tty/serial/8250/8250_ingenic.c @@ -91,14 +91,22 @@ static int __init ingenic_early_console_setup(struct earlycon_device *dev, const char *opt) { struct uart_port *port = &dev->port; - unsigned int baud, divisor; + unsigned int divisor; + int baud = 115200; if (!dev->port.membase) return -ENODEV; + if (opt) { + unsigned int parity, bits, flow; /* unused for now */ + + uart_parse_options(opt, &baud, &parity, &bits, &flow); + } + ingenic_early_console_setup_clock(dev); - baud = dev->baud ?: 115200; + if (dev->baud) + baud = dev->baud; divisor = DIV_ROUND_CLOSEST(port->uartclk, 16 * baud); early_out(port, UART_IER, 0); @@ -125,6 +133,10 @@ EARLYCON_DECLARE(jz4740_uart, ingenic_early_console_setup); OF_EARLYCON_DECLARE(jz4740_uart, "ingenic,jz4740-uart", ingenic_early_console_setup); +EARLYCON_DECLARE(jz4770_uart, ingenic_early_console_setup); +OF_EARLYCON_DECLARE(jz4770_uart, "ingenic,jz4770-uart", + ingenic_early_console_setup); + EARLYCON_DECLARE(jz4775_uart, ingenic_early_console_setup); OF_EARLYCON_DECLARE(jz4775_uart, "ingenic,jz4775-uart", ingenic_early_console_setup); @@ -319,6 +331,7 @@ static const struct ingenic_uart_config jz4780_uart_config = { static const struct of_device_id of_match[] = { { .compatible = "ingenic,jz4740-uart", .data = &jz4740_uart_config }, { .compatible = "ingenic,jz4760-uart", .data = &jz4760_uart_config }, + { .compatible = "ingenic,jz4770-uart", .data = &jz4760_uart_config }, { .compatible = "ingenic,jz4775-uart", .data = &jz4760_uart_config }, { .compatible = "ingenic,jz4780-uart", .data = &jz4780_uart_config }, { /* sentinel */ } diff --git a/drivers/tty/serial/8250/8250_of.c b/drivers/tty/serial/8250/8250_of.c index 1e67a7e4a5fd..160b8906d9b9 100644 --- a/drivers/tty/serial/8250/8250_of.c +++ b/drivers/tty/serial/8250/8250_of.c @@ -136,8 +136,11 @@ static int of_platform_serial_setup(struct platform_device *ofdev, } info->rst = devm_reset_control_get_optional_shared(&ofdev->dev, NULL); - if (IS_ERR(info->rst)) + if (IS_ERR(info->rst)) { + ret = PTR_ERR(info->rst); goto err_dispose; + } + ret = reset_control_deassert(info->rst); if (ret) goto err_dispose; diff --git a/drivers/tty/serial/8250/8250_omap.c b/drivers/tty/serial/8250/8250_omap.c index bd40ba402410..57f6eba47f44 100644 --- a/drivers/tty/serial/8250/8250_omap.c +++ b/drivers/tty/serial/8250/8250_omap.c @@ -414,7 +414,7 @@ static void omap_8250_set_termios(struct uart_port *port, /* Up to here it was mostly serial8250_do_set_termios() */ /* - * We enable TRIG_GRANU for RX and TX and additionaly we set + * We enable TRIG_GRANU for RX and TX and additionally we set * SCR_TX_EMPTY bit. The result is the following: * - RX_TRIGGER amount of bytes in the FIFO will cause an interrupt. * - less than RX_TRIGGER number of bytes will also cause an interrupt diff --git a/drivers/tty/serial/8250/8250_port.c b/drivers/tty/serial/8250/8250_port.c index 11434551ac0a..1328c7e70108 100644 --- a/drivers/tty/serial/8250/8250_port.c +++ b/drivers/tty/serial/8250/8250_port.c @@ -441,7 +441,6 @@ static void io_serial_out(struct uart_port *p, int offset, int value) } static int serial8250_default_handle_irq(struct uart_port *port); -static int exar_handle_irq(struct uart_port *port); static void set_io_from_upio(struct uart_port *p) { @@ -1884,26 +1883,6 @@ static int serial8250_default_handle_irq(struct uart_port *port) } /* - * These Exar UARTs have an extra interrupt indicator that could - * fire for a few unimplemented interrupts. One of which is a - * wakeup event when coming out of sleep. Put this here just - * to be on the safe side that these interrupts don't go unhandled. - */ -static int exar_handle_irq(struct uart_port *port) -{ - unsigned int iir = serial_port_in(port, UART_IIR); - int ret = 0; - - if (((port->type == PORT_XR17V35X) || (port->type == PORT_XR17D15X)) && - serial_port_in(port, UART_EXAR_INT0) != 0) - ret = 1; - - ret |= serial8250_handle_irq(port, iir); - - return ret; -} - -/* * Newer 16550 compatible parts such as the SC16C650 & Altera 16550 Soft IP * have a programmable TX threshold that triggers the THRE interrupt in * the IIR register. In this case, the THRE interrupt indicates the FIFO @@ -3067,11 +3046,6 @@ static void serial8250_config_port(struct uart_port *port, int flags) if (port->type == PORT_UNKNOWN) serial8250_release_std_resource(up); - /* Fixme: probably not the best place for this */ - if ((port->type == PORT_XR17V35X) || - (port->type == PORT_XR17D15X)) - port->handle_irq = exar_handle_irq; - register_dev_spec_attr_grp(up); up->fcr = uart_config[up->port.type].fcr; } diff --git a/drivers/tty/serial/8250/8250_uniphier.c b/drivers/tty/serial/8250/8250_uniphier.c index 45ef506293ae..28d88ccf5a0c 100644 --- a/drivers/tty/serial/8250/8250_uniphier.c +++ b/drivers/tty/serial/8250/8250_uniphier.c @@ -250,12 +250,13 @@ static int uniphier_uart_probe(struct platform_device *pdev) up.dl_read = uniphier_serial_dl_read; up.dl_write = uniphier_serial_dl_write; - priv->line = serial8250_register_8250_port(&up); - if (priv->line < 0) { + ret = serial8250_register_8250_port(&up); + if (ret < 0) { dev_err(dev, "failed to register 8250 port\n"); clk_disable_unprepare(priv->clk); return ret; } + priv->line = ret; platform_set_drvdata(pdev, priv); diff --git a/drivers/tty/serial/8250/Kconfig b/drivers/tty/serial/8250/Kconfig index a5c0ef1e7695..16b1496e6105 100644 --- a/drivers/tty/serial/8250/Kconfig +++ b/drivers/tty/serial/8250/Kconfig @@ -5,6 +5,7 @@ config SERIAL_8250 tristate "8250/16550 and compatible serial support" + depends on !S390 select SERIAL_CORE ---help--- This selects whether you want to include the driver for the standard diff --git a/drivers/tty/serial/Kconfig b/drivers/tty/serial/Kconfig index b788fee54249..3682fd3e960c 100644 --- a/drivers/tty/serial/Kconfig +++ b/drivers/tty/serial/Kconfig @@ -761,24 +761,30 @@ config SERIAL_SH_SCI select SERIAL_MCTRL_GPIO if GPIOLIB config SERIAL_SH_SCI_NR_UARTS - int "Maximum number of SCI(F) serial ports" + int "Maximum number of SCI(F) serial ports" if EXPERT depends on SERIAL_SH_SCI + default "3" if H8300 + default "10" if SUPERH + default "18" if ARCH_RENESAS default "2" config SERIAL_SH_SCI_CONSOLE - bool "Support for console on SuperH SCI(F)" + bool "Support for console on SuperH SCI(F)" if EXPERT depends on SERIAL_SH_SCI=y select SERIAL_CORE_CONSOLE + default y config SERIAL_SH_SCI_EARLYCON - bool "Support for early console on SuperH SCI(F)" + bool "Support for early console on SuperH SCI(F)" if EXPERT depends on SERIAL_SH_SCI=y select SERIAL_CORE_CONSOLE select SERIAL_EARLYCON + default ARCH_RENESAS || H8300 config SERIAL_SH_SCI_DMA - bool "DMA support" + bool "DMA support" if EXPERT depends on SERIAL_SH_SCI && DMA_ENGINE + default ARCH_RENESAS config SERIAL_PNX8XXX bool "Enable PNX8XXX SoCs' UART Support" diff --git a/drivers/tty/serial/amba-pl011.c b/drivers/tty/serial/amba-pl011.c index 04af8de8617e..4b40a5b449ee 100644 --- a/drivers/tty/serial/amba-pl011.c +++ b/drivers/tty/serial/amba-pl011.c @@ -314,10 +314,9 @@ static void pl011_write(unsigned int val, const struct uart_amba_port *uap, static int pl011_fifo_to_tty(struct uart_amba_port *uap) { u16 status; - unsigned int ch, flag, max_count = 256; - int fifotaken = 0; + unsigned int ch, flag, fifotaken; - while (max_count--) { + for (fifotaken = 0; fifotaken != 256; fifotaken++) { status = pl011_read(uap, REG_FR); if (status & UART01x_FR_RXFE) break; @@ -326,7 +325,6 @@ static int pl011_fifo_to_tty(struct uart_amba_port *uap) ch = pl011_read(uap, REG_DR) | UART_DUMMY_DR_RX; flag = TTY_NORMAL; uap->port.icount.rx++; - fifotaken++; if (unlikely(ch & UART_DR_ERROR)) { if (ch & UART011_DR_BE) { @@ -1482,12 +1480,10 @@ static irqreturn_t pl011_int(int irq, void *dev_id) struct uart_amba_port *uap = dev_id; unsigned long flags; unsigned int status, pass_counter = AMBA_ISR_PASS_LIMIT; - u16 imsc; int handled = 0; spin_lock_irqsave(&uap->port.lock, flags); - imsc = pl011_read(uap, REG_IMSC); - status = pl011_read(uap, REG_RIS) & imsc; + status = pl011_read(uap, REG_RIS) & uap->im; if (status) { do { check_apply_cts_event_workaround(uap); @@ -1511,7 +1507,7 @@ static irqreturn_t pl011_int(int irq, void *dev_id) if (pass_counter-- == 0) break; - status = pl011_read(uap, REG_RIS) & imsc; + status = pl011_read(uap, REG_RIS) & uap->im; } while (status != 0); handled = 1; } diff --git a/drivers/tty/serial/atmel_serial.c b/drivers/tty/serial/atmel_serial.c index efa25611ca0c..df46a9e88c34 100644 --- a/drivers/tty/serial/atmel_serial.c +++ b/drivers/tty/serial/atmel_serial.c @@ -2345,7 +2345,7 @@ static int atmel_init_port(struct atmel_uart_port *atmel_port, atmel_init_property(atmel_port, pdev); atmel_set_ops(port); - of_get_rs485_mode(pdev->dev.of_node, &port->rs485); + uart_get_rs485_mode(&pdev->dev, &port->rs485); port->iotype = UPIO_MEM; port->flags = UPF_BOOT_AUTOCONF | UPF_IOREMAP; diff --git a/drivers/tty/serial/earlycon.c b/drivers/tty/serial/earlycon.c index 4c8b80f1c688..870e84fb6e39 100644 --- a/drivers/tty/serial/earlycon.c +++ b/drivers/tty/serial/earlycon.c @@ -197,25 +197,20 @@ int __init setup_earlycon(char *buf) } /* - * When CONFIG_ACPI_SPCR_TABLE is defined, "earlycon" without parameters in - * command line does not start DT earlycon immediately, instead it defers - * starting it until DT/ACPI decision is made. At that time if ACPI is enabled - * call parse_spcr(), else call early_init_dt_scan_chosen_stdout() + * This defers the initialization of the early console until after ACPI has + * been initialized. */ -bool earlycon_init_is_deferred __initdata; +bool earlycon_acpi_spcr_enable __initdata; /* early_param wrapper for setup_earlycon() */ static int __init param_setup_earlycon(char *buf) { int err; - /* - * Just 'earlycon' is a valid param for devicetree earlycons; - * don't generate a warning from parse_early_params() in that case - */ + /* Just 'earlycon' is a valid param for devicetree and ACPI SPCR. */ if (!buf || !buf[0]) { if (IS_ENABLED(CONFIG_ACPI_SPCR_TABLE)) { - earlycon_init_is_deferred = true; + earlycon_acpi_spcr_enable = true; return 0; } else if (!buf) { return early_init_dt_scan_chosen_stdout(); diff --git a/drivers/tty/serial/fsl_lpuart.c b/drivers/tty/serial/fsl_lpuart.c index 1c4d3f387138..8cf112f2efc3 100644 --- a/drivers/tty/serial/fsl_lpuart.c +++ b/drivers/tty/serial/fsl_lpuart.c @@ -2206,23 +2206,16 @@ static int lpuart_probe(struct platform_device *pdev) if (ret) goto failed_attach_port; - of_get_rs485_mode(np, &sport->port.rs485); + uart_get_rs485_mode(&pdev->dev, &sport->port.rs485); - if (sport->port.rs485.flags & SER_RS485_RX_DURING_TX) { + if (sport->port.rs485.flags & SER_RS485_RX_DURING_TX) dev_err(&pdev->dev, "driver doesn't support RX during TX\n"); - return -ENOSYS; - } if (sport->port.rs485.delay_rts_before_send || - sport->port.rs485.delay_rts_after_send) { + sport->port.rs485.delay_rts_after_send) dev_err(&pdev->dev, "driver doesn't support RTS delays\n"); - return -ENOSYS; - } - if (sport->port.rs485.flags & SER_RS485_ENABLED) { - sport->port.rs485.flags |= SER_RS485_RTS_ON_SEND; - writeb(UARTMODEM_TXRTSE, sport->port.membase + UARTMODEM); - } + lpuart_config_rs485(&sport->port, &sport->port.rs485); sport->dma_tx_chan = dma_request_slave_channel(sport->port.dev, "tx"); if (!sport->dma_tx_chan) diff --git a/drivers/tty/serial/imx.c b/drivers/tty/serial/imx.c index e4b3d9123a03..1d7ca382bc12 100644 --- a/drivers/tty/serial/imx.c +++ b/drivers/tty/serial/imx.c @@ -703,25 +703,6 @@ out: return IRQ_HANDLED; } -static void imx_disable_rx_int(struct imx_port *sport) -{ - unsigned long temp; - - /* disable the receiver ready and aging timer interrupts */ - temp = readl(sport->port.membase + UCR1); - temp &= ~(UCR1_RRDYEN); - writel(temp, sport->port.membase + UCR1); - - temp = readl(sport->port.membase + UCR2); - temp &= ~(UCR2_ATEN); - writel(temp, sport->port.membase + UCR2); - - /* disable the rx errors interrupts */ - temp = readl(sport->port.membase + UCR4); - temp &= ~UCR4_OREN; - writel(temp, sport->port.membase + UCR4); -} - static void clear_rx_errors(struct imx_port *sport); /* @@ -1252,18 +1233,21 @@ static int imx_startup(struct uart_port *port) if (sport->dma_is_inited && !sport->dma_is_enabled) imx_enable_dma(sport); - temp = readl(sport->port.membase + UCR1); - temp |= UCR1_RRDYEN | UCR1_UARTEN; + temp = readl(sport->port.membase + UCR1) & ~UCR1_RRDYEN; + if (!sport->dma_is_enabled) + temp |= UCR1_RRDYEN; + temp |= UCR1_UARTEN; if (sport->have_rtscts) temp |= UCR1_RTSDEN; writel(temp, sport->port.membase + UCR1); - temp = readl(sport->port.membase + UCR4); - temp |= UCR4_OREN; + temp = readl(sport->port.membase + UCR4) & ~UCR4_OREN; + if (!sport->dma_is_enabled) + temp |= UCR4_OREN; writel(temp, sport->port.membase + UCR4); - temp = readl(sport->port.membase + UCR2); + temp = readl(sport->port.membase + UCR2) & ~UCR2_ATEN; temp |= (UCR2_RXEN | UCR2_TXEN); if (!sport->have_rtscts) temp |= UCR2_IRTS; @@ -1297,10 +1281,8 @@ static int imx_startup(struct uart_port *port) * In our iMX53 the average delay for the first reception dropped from * approximately 35000 microseconds to 1000 microseconds. */ - if (sport->dma_is_enabled) { - imx_disable_rx_int(sport); + if (sport->dma_is_enabled) start_rx_dma(sport); - } spin_unlock_irqrestore(&sport->port.lock, flags); @@ -2017,8 +1999,6 @@ static int serial_imx_probe_dt(struct imx_port *sport, if (of_get_property(np, "rts-gpios", NULL)) sport->have_rtsgpio = 1; - of_get_rs485_mode(np, &sport->port.rs485); - return 0; } #else @@ -2080,7 +2060,6 @@ static int serial_imx_probe(struct platform_device *pdev) sport->port.fifosize = 32; sport->port.ops = &imx_pops; sport->port.rs485_config = imx_rs485_config; - sport->port.rs485.flags |= SER_RS485_RTS_ON_SEND; sport->port.flags = UPF_BOOT_AUTOCONF; timer_setup(&sport->timer, imx_timeout, 0); @@ -2111,6 +2090,14 @@ static int serial_imx_probe(struct platform_device *pdev) return ret; } + uart_get_rs485_mode(&pdev->dev, &sport->port.rs485); + + if (sport->port.rs485.flags & SER_RS485_ENABLED && + (!sport->have_rtscts || !sport->have_rtsgpio)) + dev_err(&pdev->dev, "no RTS control, disabling rs485\n"); + + imx_rs485_config(&sport->port, &sport->port.rs485); + /* Disable interrupts before requesting them */ reg = readl_relaxed(sport->port.membase + UCR1); reg &= ~(UCR1_ADEN | UCR1_TRDYEN | UCR1_IDEN | UCR1_RRDYEN | @@ -2232,29 +2219,28 @@ static void serial_imx_enable_wakeup(struct imx_port *sport, bool on) unsigned int val; val = readl(sport->port.membase + UCR3); - if (on) + if (on) { + writel(USR1_AWAKE, sport->port.membase + USR1); val |= UCR3_AWAKEN; + } else val &= ~UCR3_AWAKEN; writel(val, sport->port.membase + UCR3); - val = readl(sport->port.membase + UCR1); - if (on) - val |= UCR1_RTSDEN; - else - val &= ~UCR1_RTSDEN; - writel(val, sport->port.membase + UCR1); + if (sport->have_rtscts) { + val = readl(sport->port.membase + UCR1); + if (on) + val |= UCR1_RTSDEN; + else + val &= ~UCR1_RTSDEN; + writel(val, sport->port.membase + UCR1); + } } static int imx_serial_port_suspend_noirq(struct device *dev) { struct platform_device *pdev = to_platform_device(dev); struct imx_port *sport = platform_get_drvdata(pdev); - int ret; - - ret = clk_enable(sport->clk_ipg); - if (ret) - return ret; serial_imx_save_context(sport); @@ -2275,8 +2261,6 @@ static int imx_serial_port_resume_noirq(struct device *dev) serial_imx_restore_context(sport); - clk_disable(sport->clk_ipg); - return 0; } @@ -2284,15 +2268,19 @@ static int imx_serial_port_suspend(struct device *dev) { struct platform_device *pdev = to_platform_device(dev); struct imx_port *sport = platform_get_drvdata(pdev); - - /* enable wakeup from i.MX UART */ - serial_imx_enable_wakeup(sport, true); + int ret; uart_suspend_port(&imx_reg, &sport->port); disable_irq(sport->port.irq); - /* Needed to enable clock in suspend_noirq */ - return clk_prepare(sport->clk_ipg); + ret = clk_prepare_enable(sport->clk_ipg); + if (ret) + return ret; + + /* enable wakeup from i.MX UART */ + serial_imx_enable_wakeup(sport, true); + + return 0; } static int imx_serial_port_resume(struct device *dev) @@ -2306,7 +2294,7 @@ static int imx_serial_port_resume(struct device *dev) uart_resume_port(&imx_reg, &sport->port); enable_irq(sport->port.irq); - clk_unprepare(sport->clk_ipg); + clk_disable_unprepare(sport->clk_ipg); return 0; } @@ -2318,8 +2306,7 @@ static int imx_serial_port_freeze(struct device *dev) uart_suspend_port(&imx_reg, &sport->port); - /* Needed to enable clock in suspend_noirq */ - return clk_prepare(sport->clk_ipg); + return clk_prepare_enable(sport->clk_ipg); } static int imx_serial_port_thaw(struct device *dev) @@ -2329,7 +2316,7 @@ static int imx_serial_port_thaw(struct device *dev) uart_resume_port(&imx_reg, &sport->port); - clk_unprepare(sport->clk_ipg); + clk_disable_unprepare(sport->clk_ipg); return 0; } diff --git a/drivers/tty/serial/jsm/jsm_neo.c b/drivers/tty/serial/jsm/jsm_neo.c index 4718560b8fdc..bf0e2a4cb0ce 100644 --- a/drivers/tty/serial/jsm/jsm_neo.c +++ b/drivers/tty/serial/jsm/jsm_neo.c @@ -282,9 +282,6 @@ static void neo_copy_data_from_uart_to_queue(struct jsm_channel *ch) u16 head; u16 tail; - if (!ch) - return; - /* cache head and tail of queue */ head = ch->ch_r_head & RQUEUEMASK; tail = ch->ch_r_tail & RQUEUEMASK; @@ -1175,6 +1172,9 @@ static irqreturn_t neo_intr(int irq, void *voidbrd) continue; ch = brd->channels[port]; + if (!ch) + continue; + neo_copy_data_from_uart_to_queue(ch); /* Call our tty layer to enforce queue flow control if needed. */ diff --git a/drivers/tty/serial/jsm/jsm_tty.c b/drivers/tty/serial/jsm/jsm_tty.c index 469927d37b41..b6bd6e15e07b 100644 --- a/drivers/tty/serial/jsm/jsm_tty.c +++ b/drivers/tty/serial/jsm/jsm_tty.c @@ -523,9 +523,6 @@ void jsm_input(struct jsm_channel *ch) jsm_dbg(READ, &ch->ch_bd->pci_dev, "start\n"); - if (!ch) - return; - port = &ch->uart_port.state->port; tp = port->tty; @@ -648,11 +645,8 @@ static void jsm_carrier(struct jsm_channel *ch) int phys_carrier = 0; jsm_dbg(CARR, &ch->ch_bd->pci_dev, "start\n"); - if (!ch) - return; bd = ch->ch_bd; - if (!bd) return; diff --git a/drivers/tty/serial/max310x.c b/drivers/tty/serial/max310x.c index ecb6513a6505..39f635812077 100644 --- a/drivers/tty/serial/max310x.c +++ b/drivers/tty/serial/max310x.c @@ -233,6 +233,7 @@ /* Misc definitions */ #define MAX310X_FIFO_SIZE (128) #define MAX310x_REV_MASK (0xf8) +#define MAX310X_WRITE_BIT 0x80 /* MAX3107 specific */ #define MAX3107_REV_ID (0xa0) @@ -593,57 +594,118 @@ static int max310x_set_ref_clk(struct max310x_port *s, unsigned long freq, return (int)bestfreq; } -static void max310x_handle_rx(struct uart_port *port, unsigned int rxlen) +static void max310x_batch_write(struct uart_port *port, u8 *txbuf, unsigned int len) { - unsigned int sts, ch, flag; + u8 header[] = { (port->iobase + MAX310X_THR_REG) | MAX310X_WRITE_BIT }; + struct spi_transfer xfer[] = { + { + .tx_buf = &header, + .len = sizeof(header), + }, { + .tx_buf = txbuf, + .len = len, + } + }; + spi_sync_transfer(to_spi_device(port->dev), xfer, ARRAY_SIZE(xfer)); +} - if (unlikely(rxlen >= port->fifosize)) { - dev_warn_ratelimited(port->dev, "Possible RX FIFO overrun\n"); - port->icount.buf_overrun++; - /* Ensure sanity of RX level */ - rxlen = port->fifosize; - } +static void max310x_batch_read(struct uart_port *port, u8 *rxbuf, unsigned int len) +{ + u8 header[] = { port->iobase + MAX310X_RHR_REG }; + struct spi_transfer xfer[] = { + { + .tx_buf = &header, + .len = sizeof(header), + }, { + .rx_buf = rxbuf, + .len = len, + } + }; + spi_sync_transfer(to_spi_device(port->dev), xfer, ARRAY_SIZE(xfer)); +} - while (rxlen--) { - ch = max310x_port_read(port, MAX310X_RHR_REG); - sts = max310x_port_read(port, MAX310X_LSR_IRQSTS_REG); +static void max310x_handle_rx(struct uart_port *port, unsigned int rxlen) +{ + unsigned int sts, ch, flag, i; + u8 buf[MAX310X_FIFO_SIZE]; + + if (port->read_status_mask == MAX310X_LSR_RXOVR_BIT) { + /* We are just reading, happily ignoring any error conditions. + * Break condition, parity checking, framing errors -- they + * are all ignored. That means that we can do a batch-read. + * + * There is a small opportunity for race if the RX FIFO + * overruns while we're reading the buffer; the datasheets says + * that the LSR register applies to the "current" character. + * That's also the reason why we cannot do batched reads when + * asked to check the individual statuses. + * */ - sts &= MAX310X_LSR_RXPAR_BIT | MAX310X_LSR_FRERR_BIT | - MAX310X_LSR_RXOVR_BIT | MAX310X_LSR_RXBRK_BIT; + sts = max310x_port_read(port, MAX310X_LSR_IRQSTS_REG); + max310x_batch_read(port, buf, rxlen); - port->icount.rx++; + port->icount.rx += rxlen; flag = TTY_NORMAL; + sts &= port->read_status_mask; - if (unlikely(sts)) { - if (sts & MAX310X_LSR_RXBRK_BIT) { - port->icount.brk++; - if (uart_handle_break(port)) - continue; - } else if (sts & MAX310X_LSR_RXPAR_BIT) - port->icount.parity++; - else if (sts & MAX310X_LSR_FRERR_BIT) - port->icount.frame++; - else if (sts & MAX310X_LSR_RXOVR_BIT) - port->icount.overrun++; - - sts &= port->read_status_mask; - if (sts & MAX310X_LSR_RXBRK_BIT) - flag = TTY_BREAK; - else if (sts & MAX310X_LSR_RXPAR_BIT) - flag = TTY_PARITY; - else if (sts & MAX310X_LSR_FRERR_BIT) - flag = TTY_FRAME; - else if (sts & MAX310X_LSR_RXOVR_BIT) - flag = TTY_OVERRUN; + if (sts & MAX310X_LSR_RXOVR_BIT) { + dev_warn_ratelimited(port->dev, "Hardware RX FIFO overrun\n"); + port->icount.overrun++; } - if (uart_handle_sysrq_char(port, ch)) - continue; + for (i = 0; i < rxlen; ++i) { + uart_insert_char(port, sts, MAX310X_LSR_RXOVR_BIT, buf[i], flag); + } + + } else { + if (unlikely(rxlen >= port->fifosize)) { + dev_warn_ratelimited(port->dev, "Possible RX FIFO overrun\n"); + port->icount.buf_overrun++; + /* Ensure sanity of RX level */ + rxlen = port->fifosize; + } + + while (rxlen--) { + ch = max310x_port_read(port, MAX310X_RHR_REG); + sts = max310x_port_read(port, MAX310X_LSR_IRQSTS_REG); + + sts &= MAX310X_LSR_RXPAR_BIT | MAX310X_LSR_FRERR_BIT | + MAX310X_LSR_RXOVR_BIT | MAX310X_LSR_RXBRK_BIT; + + port->icount.rx++; + flag = TTY_NORMAL; + + if (unlikely(sts)) { + if (sts & MAX310X_LSR_RXBRK_BIT) { + port->icount.brk++; + if (uart_handle_break(port)) + continue; + } else if (sts & MAX310X_LSR_RXPAR_BIT) + port->icount.parity++; + else if (sts & MAX310X_LSR_FRERR_BIT) + port->icount.frame++; + else if (sts & MAX310X_LSR_RXOVR_BIT) + port->icount.overrun++; + + sts &= port->read_status_mask; + if (sts & MAX310X_LSR_RXBRK_BIT) + flag = TTY_BREAK; + else if (sts & MAX310X_LSR_RXPAR_BIT) + flag = TTY_PARITY; + else if (sts & MAX310X_LSR_FRERR_BIT) + flag = TTY_FRAME; + else if (sts & MAX310X_LSR_RXOVR_BIT) + flag = TTY_OVERRUN; + } - if (sts & port->ignore_status_mask) - continue; + if (uart_handle_sysrq_char(port, ch)) + continue; - uart_insert_char(port, sts, MAX310X_LSR_RXOVR_BIT, ch, flag); + if (sts & port->ignore_status_mask) + continue; + + uart_insert_char(port, sts, MAX310X_LSR_RXOVR_BIT, ch, flag); + } } tty_flip_buffer_push(&port->state->port); @@ -652,7 +714,7 @@ static void max310x_handle_rx(struct uart_port *port, unsigned int rxlen) static void max310x_handle_tx(struct uart_port *port) { struct circ_buf *xmit = &port->state->xmit; - unsigned int txlen, to_send; + unsigned int txlen, to_send, until_end; if (unlikely(port->x_char)) { max310x_port_write(port, MAX310X_THR_REG, port->x_char); @@ -666,28 +728,43 @@ static void max310x_handle_tx(struct uart_port *port) /* Get length of data pending in circular buffer */ to_send = uart_circ_chars_pending(xmit); + until_end = CIRC_CNT_TO_END(xmit->head, xmit->tail, UART_XMIT_SIZE); if (likely(to_send)) { /* Limit to size of TX FIFO */ txlen = max310x_port_read(port, MAX310X_TXFIFOLVL_REG); txlen = port->fifosize - txlen; to_send = (to_send > txlen) ? txlen : to_send; + if (until_end < to_send) { + /* It's a circ buffer -- wrap around. + * We could do that in one SPI transaction, but meh. */ + max310x_batch_write(port, xmit->buf + xmit->tail, until_end); + max310x_batch_write(port, xmit->buf, to_send - until_end); + } else { + max310x_batch_write(port, xmit->buf + xmit->tail, to_send); + } + /* Add data to send */ port->icount.tx += to_send; - while (to_send--) { - max310x_port_write(port, MAX310X_THR_REG, - xmit->buf[xmit->tail]); - xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1); - } + xmit->tail = (xmit->tail + to_send) & (UART_XMIT_SIZE - 1); } if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) uart_write_wakeup(port); } -static void max310x_port_irq(struct max310x_port *s, int portno) +static void max310x_start_tx(struct uart_port *port) +{ + struct max310x_one *one = container_of(port, struct max310x_one, port); + + if (!work_pending(&one->tx_work)) + schedule_work(&one->tx_work); +} + +static irqreturn_t max310x_port_irq(struct max310x_port *s, int portno) { struct uart_port *port = &s->p[portno].port; + irqreturn_t res = IRQ_NONE; do { unsigned int ists, lsr, rxlen; @@ -698,6 +775,8 @@ static void max310x_port_irq(struct max310x_port *s, int portno) if (!ists && !rxlen) break; + res = IRQ_HANDLED; + if (ists & MAX310X_IRQ_CTS_BIT) { lsr = max310x_port_read(port, MAX310X_LSR_IRQSTS_REG); uart_handle_cts_change(port, @@ -705,17 +784,16 @@ static void max310x_port_irq(struct max310x_port *s, int portno) } if (rxlen) max310x_handle_rx(port, rxlen); - if (ists & MAX310X_IRQ_TXEMPTY_BIT) { - mutex_lock(&s->mutex); - max310x_handle_tx(port); - mutex_unlock(&s->mutex); - } + if (ists & MAX310X_IRQ_TXEMPTY_BIT) + max310x_start_tx(port); } while (1); + return res; } static irqreturn_t max310x_ist(int irq, void *dev_id) { struct max310x_port *s = (struct max310x_port *)dev_id; + bool handled = false; if (s->devtype->nr > 1) { do { @@ -726,12 +804,15 @@ static irqreturn_t max310x_ist(int irq, void *dev_id) val = ((1 << s->devtype->nr) - 1) & ~val; if (!val) break; - max310x_port_irq(s, fls(val) - 1); + if (max310x_port_irq(s, fls(val) - 1) == IRQ_HANDLED) + handled = true; } while (1); - } else - max310x_port_irq(s, 0); + } else { + if (max310x_port_irq(s, 0) == IRQ_HANDLED) + handled = true; + } - return IRQ_HANDLED; + return IRQ_RETVAL(handled); } static void max310x_wq_proc(struct work_struct *ws) @@ -744,14 +825,6 @@ static void max310x_wq_proc(struct work_struct *ws) mutex_unlock(&s->mutex); } -static void max310x_start_tx(struct uart_port *port) -{ - struct max310x_one *one = container_of(port, struct max310x_one, port); - - if (!work_pending(&one->tx_work)) - schedule_work(&one->tx_work); -} - static unsigned int max310x_tx_empty(struct uart_port *port) { unsigned int lvl, sts; @@ -1086,10 +1159,31 @@ static int max310x_gpio_direction_output(struct gpio_chip *chip, return 0; } + +static int max310x_gpio_set_config(struct gpio_chip *chip, unsigned int offset, + unsigned long config) +{ + struct max310x_port *s = gpiochip_get_data(chip); + struct uart_port *port = &s->p[offset / 4].port; + + switch (pinconf_to_config_param(config)) { + case PIN_CONFIG_DRIVE_OPEN_DRAIN: + max310x_port_update(port, MAX310X_GPIOCFG_REG, + 1 << ((offset % 4) + 4), + 1 << ((offset % 4) + 4)); + return 0; + case PIN_CONFIG_DRIVE_PUSH_PULL: + max310x_port_update(port, MAX310X_GPIOCFG_REG, + 1 << ((offset % 4) + 4), 0); + return 0; + default: + return -ENOTSUPP; + } +} #endif static int max310x_probe(struct device *dev, struct max310x_devtype *devtype, - struct regmap *regmap, int irq, unsigned long flags) + struct regmap *regmap, int irq) { int i, ret, fmin, fmax, freq, uartclk; struct clk *clk_osc, *clk_xtal; @@ -1169,23 +1263,6 @@ static int max310x_probe(struct device *dev, struct max310x_devtype *devtype, uartclk = max310x_set_ref_clk(s, freq, xtal); dev_dbg(dev, "Reference clock set to %i Hz\n", uartclk); -#ifdef CONFIG_GPIOLIB - /* Setup GPIO cotroller */ - s->gpio.owner = THIS_MODULE; - s->gpio.parent = dev; - s->gpio.label = dev_name(dev); - s->gpio.direction_input = max310x_gpio_direction_input; - s->gpio.get = max310x_gpio_get; - s->gpio.direction_output= max310x_gpio_direction_output; - s->gpio.set = max310x_gpio_set; - s->gpio.base = -1; - s->gpio.ngpio = devtype->nr * 4; - s->gpio.can_sleep = 1; - ret = devm_gpiochip_add_data(dev, &s->gpio, s); - if (ret) - goto out_clk; -#endif - mutex_init(&s->mutex); for (i = 0; i < devtype->nr; i++) { @@ -1237,9 +1314,27 @@ static int max310x_probe(struct device *dev, struct max310x_devtype *devtype, devtype->power(&s->p[i].port, 0); } +#ifdef CONFIG_GPIOLIB + /* Setup GPIO cotroller */ + s->gpio.owner = THIS_MODULE; + s->gpio.parent = dev; + s->gpio.label = dev_name(dev); + s->gpio.direction_input = max310x_gpio_direction_input; + s->gpio.get = max310x_gpio_get; + s->gpio.direction_output= max310x_gpio_direction_output; + s->gpio.set = max310x_gpio_set; + s->gpio.set_config = max310x_gpio_set_config; + s->gpio.base = -1; + s->gpio.ngpio = devtype->nr * 4; + s->gpio.can_sleep = 1; + ret = devm_gpiochip_add_data(dev, &s->gpio, s); + if (ret) + goto out_uart; +#endif + /* Setup interrupt */ ret = devm_request_threaded_irq(dev, irq, NULL, max310x_ist, - IRQF_ONESHOT | flags, dev_name(dev), s); + IRQF_ONESHOT | IRQF_SHARED, dev_name(dev), s); if (!ret) return 0; @@ -1293,7 +1388,7 @@ MODULE_DEVICE_TABLE(of, max310x_dt_ids); static struct regmap_config regcfg = { .reg_bits = 8, .val_bits = 8, - .write_flag_mask = 0x80, + .write_flag_mask = MAX310X_WRITE_BIT, .cache_type = REGCACHE_RBTREE, .writeable_reg = max310x_reg_writeable, .volatile_reg = max310x_reg_volatile, @@ -1304,7 +1399,6 @@ static struct regmap_config regcfg = { static int max310x_spi_probe(struct spi_device *spi) { struct max310x_devtype *devtype; - unsigned long flags = 0; struct regmap *regmap; int ret; @@ -1327,11 +1421,10 @@ static int max310x_spi_probe(struct spi_device *spi) devtype = (struct max310x_devtype *)id_entry->driver_data; } - flags = IRQF_TRIGGER_FALLING; regcfg.max_register = devtype->nr * 0x20 - 1; regmap = devm_regmap_init_spi(spi, ®cfg); - return max310x_probe(&spi->dev, devtype, regmap, spi->irq, flags); + return max310x_probe(&spi->dev, devtype, regmap, spi->irq); } static int max310x_spi_remove(struct spi_device *spi) diff --git a/drivers/tty/serial/meson_uart.c b/drivers/tty/serial/meson_uart.c index daafe60175da..8a842591b37c 100644 --- a/drivers/tty/serial/meson_uart.c +++ b/drivers/tty/serial/meson_uart.c @@ -34,9 +34,15 @@ /* AML_UART_CONTROL bits */ #define AML_UART_TX_EN BIT(12) #define AML_UART_RX_EN BIT(13) +#define AML_UART_TWO_WIRE_EN BIT(15) +#define AML_UART_STOP_BIT_LEN_MASK (0x03 << 16) +#define AML_UART_STOP_BIT_1SB (0x00 << 16) +#define AML_UART_STOP_BIT_2SB (0x01 << 16) +#define AML_UART_PARITY_TYPE BIT(18) +#define AML_UART_PARITY_EN BIT(19) #define AML_UART_TX_RST BIT(22) #define AML_UART_RX_RST BIT(23) -#define AML_UART_CLR_ERR BIT(24) +#define AML_UART_CLEAR_ERR BIT(24) #define AML_UART_RX_INT_EN BIT(27) #define AML_UART_TX_INT_EN BIT(28) #define AML_UART_DATA_LEN_MASK (0x03 << 20) @@ -57,15 +63,6 @@ AML_UART_FRAME_ERR | \ AML_UART_TX_FIFO_WERR) -/* AML_UART_CONTROL bits */ -#define AML_UART_TWO_WIRE_EN BIT(15) -#define AML_UART_PARITY_TYPE BIT(18) -#define AML_UART_PARITY_EN BIT(19) -#define AML_UART_CLEAR_ERR BIT(24) -#define AML_UART_STOP_BIN_LEN_MASK (0x03 << 16) -#define AML_UART_STOP_BIN_1SB (0x00 << 16) -#define AML_UART_STOP_BIN_2SB (0x01 << 16) - /* AML_UART_MISC bits */ #define AML_UART_XMIT_IRQ(c) (((c) & 0xff) << 8) #define AML_UART_RECV_IRQ(c) ((c) & 0xff) @@ -263,10 +260,10 @@ static void meson_uart_reset(struct uart_port *port) u32 val; val = readl(port->membase + AML_UART_CONTROL); - val |= (AML_UART_RX_RST | AML_UART_TX_RST | AML_UART_CLR_ERR); + val |= (AML_UART_RX_RST | AML_UART_TX_RST | AML_UART_CLEAR_ERR); writel(val, port->membase + AML_UART_CONTROL); - val &= ~(AML_UART_RX_RST | AML_UART_TX_RST | AML_UART_CLR_ERR); + val &= ~(AML_UART_RX_RST | AML_UART_TX_RST | AML_UART_CLEAR_ERR); writel(val, port->membase + AML_UART_CONTROL); } @@ -276,9 +273,9 @@ static int meson_uart_startup(struct uart_port *port) int ret = 0; val = readl(port->membase + AML_UART_CONTROL); - val |= AML_UART_CLR_ERR; + val |= AML_UART_CLEAR_ERR; writel(val, port->membase + AML_UART_CONTROL); - val &= ~AML_UART_CLR_ERR; + val &= ~AML_UART_CLEAR_ERR; writel(val, port->membase + AML_UART_CONTROL); val |= (AML_UART_RX_EN | AML_UART_TX_EN); @@ -354,11 +351,11 @@ static void meson_uart_set_termios(struct uart_port *port, else val &= ~AML_UART_PARITY_TYPE; - val &= ~AML_UART_STOP_BIN_LEN_MASK; + val &= ~AML_UART_STOP_BIT_LEN_MASK; if (cflags & CSTOPB) - val |= AML_UART_STOP_BIN_2SB; + val |= AML_UART_STOP_BIT_2SB; else - val |= AML_UART_STOP_BIN_1SB; + val |= AML_UART_STOP_BIT_1SB; if (cflags & CRTSCTS) val &= ~AML_UART_TWO_WIRE_EN; diff --git a/drivers/tty/serial/mxs-auart.c b/drivers/tty/serial/mxs-auart.c index efb4fd3784ed..079dc47aa142 100644 --- a/drivers/tty/serial/mxs-auart.c +++ b/drivers/tty/serial/mxs-auart.c @@ -40,7 +40,6 @@ #include <asm/cacheflush.h> -#include <linux/gpio.h> #include <linux/gpio/consumer.h> #include <linux/err.h> #include <linux/irq.h> @@ -1597,7 +1596,7 @@ static int mxs_auart_init_gpios(struct mxs_auart_port *s, struct device *dev) for (i = 0; i < UART_GPIO_MAX; i++) { gpiod = mctrl_gpio_to_gpiod(s->gpios, i); - if (gpiod && (gpiod_get_direction(gpiod) == GPIOF_DIR_IN)) + if (gpiod && (gpiod_get_direction(gpiod) == 1)) s->gpio_irq[i] = gpiod_to_irq(gpiod); else s->gpio_irq[i] = -EINVAL; @@ -1721,7 +1720,7 @@ static int mxs_auart_probe(struct platform_device *pdev) ret = uart_add_one_port(&auart_driver, &s->port); if (ret) - goto out_free_gpio_irq; + goto out_disable_clks_free_qpio_irq; /* ASM9260 don't have version reg */ if (is_asm9260_auart(s)) { @@ -1735,7 +1734,11 @@ static int mxs_auart_probe(struct platform_device *pdev) return 0; -out_free_gpio_irq: +out_disable_clks_free_qpio_irq: + if (s->clk) + clk_disable_unprepare(s->clk_ahb); + if (s->clk_ahb) + clk_disable_unprepare(s->clk_ahb); mxs_auart_free_gpio_irq(s); auart_port[pdev->id] = NULL; return ret; diff --git a/drivers/tty/serial/omap-serial.c b/drivers/tty/serial/omap-serial.c index 53d59e9b944a..6420ae581a80 100644 --- a/drivers/tty/serial/omap-serial.c +++ b/drivers/tty/serial/omap-serial.c @@ -1602,7 +1602,6 @@ static int serial_omap_probe_rs485(struct uart_omap_port *up, struct device_node *np) { struct serial_rs485 *rs485conf = &up->port.rs485; - enum of_gpio_flags flags; int ret; rs485conf->flags = 0; @@ -1611,19 +1610,24 @@ static int serial_omap_probe_rs485(struct uart_omap_port *up, if (!np) return 0; - if (of_property_read_bool(np, "rs485-rts-active-high")) + uart_get_rs485_mode(up->dev, rs485conf); + + if (of_property_read_bool(np, "rs485-rts-active-high")) { rs485conf->flags |= SER_RS485_RTS_ON_SEND; - else + rs485conf->flags &= ~SER_RS485_RTS_AFTER_SEND; + } else { + rs485conf->flags &= ~SER_RS485_RTS_ON_SEND; rs485conf->flags |= SER_RS485_RTS_AFTER_SEND; + } /* check for tx enable gpio */ - up->rts_gpio = of_get_named_gpio_flags(np, "rts-gpio", 0, &flags); + up->rts_gpio = of_get_named_gpio(np, "rts-gpio", 0); if (gpio_is_valid(up->rts_gpio)) { ret = devm_gpio_request(up->dev, up->rts_gpio, "omap-serial"); if (ret < 0) return ret; - ret = gpio_direction_output(up->rts_gpio, - flags & SER_RS485_RTS_AFTER_SEND); + ret = rs485conf->flags & SER_RS485_RTS_AFTER_SEND ? 1 : 0; + ret = gpio_direction_output(up->rts_gpio, ret); if (ret < 0) return ret; } else if (up->rts_gpio == -EPROBE_DEFER) { @@ -1632,8 +1636,6 @@ static int serial_omap_probe_rs485(struct uart_omap_port *up, up->rts_gpio = -EINVAL; } - of_get_rs485_mode(np, rs485conf); - return 0; } diff --git a/drivers/tty/serial/serial_core.c b/drivers/tty/serial/serial_core.c index 854995e1cae7..c8dde56b532b 100644 --- a/drivers/tty/serial/serial_core.c +++ b/drivers/tty/serial/serial_core.c @@ -974,6 +974,8 @@ static int uart_set_info(struct tty_struct *tty, struct tty_port *port, } } else { retval = uart_startup(tty, state, 1); + if (retval == 0) + tty_port_set_initialized(port, true); if (retval > 0) retval = 0; } @@ -1955,9 +1957,10 @@ EXPORT_SYMBOL_GPL(uart_parse_earlycon); * eg: 115200n8r */ void -uart_parse_options(char *options, int *baud, int *parity, int *bits, int *flow) +uart_parse_options(const char *options, int *baud, int *parity, + int *bits, int *flow) { - char *s = options; + const char *s = options; *baud = simple_strtoul(s, NULL, 10); while (*s >= '0' && *s <= '9') @@ -3013,19 +3016,20 @@ EXPORT_SYMBOL(uart_add_one_port); EXPORT_SYMBOL(uart_remove_one_port); /** - * of_get_rs485_mode() - Implement parsing rs485 properties - * @np: uart node + * uart_get_rs485_mode() - retrieve rs485 properties for given uart + * @dev: uart device * @rs485conf: output parameter * * This function implements the device tree binding described in * Documentation/devicetree/bindings/serial/rs485.txt. */ -void of_get_rs485_mode(struct device_node *np, struct serial_rs485 *rs485conf) +void uart_get_rs485_mode(struct device *dev, struct serial_rs485 *rs485conf) { u32 rs485_delay[2]; int ret; - ret = of_property_read_u32_array(np, "rs485-rts-delay", rs485_delay, 2); + ret = device_property_read_u32_array(dev, "rs485-rts-delay", + rs485_delay, 2); if (!ret) { rs485conf->delay_rts_before_send = rs485_delay[0]; rs485conf->delay_rts_after_send = rs485_delay[1]; @@ -3035,18 +3039,25 @@ void of_get_rs485_mode(struct device_node *np, struct serial_rs485 *rs485conf) } /* - * clear full-duplex and enabled flags to get to a defined state with - * the two following properties. + * Clear full-duplex and enabled flags, set RTS polarity to active high + * to get to a defined state with the following properties: */ - rs485conf->flags &= ~(SER_RS485_RX_DURING_TX | SER_RS485_ENABLED); + rs485conf->flags &= ~(SER_RS485_RX_DURING_TX | SER_RS485_ENABLED | + SER_RS485_RTS_AFTER_SEND); + rs485conf->flags |= SER_RS485_RTS_ON_SEND; - if (of_property_read_bool(np, "rs485-rx-during-tx")) + if (device_property_read_bool(dev, "rs485-rx-during-tx")) rs485conf->flags |= SER_RS485_RX_DURING_TX; - if (of_property_read_bool(np, "linux,rs485-enabled-at-boot-time")) + if (device_property_read_bool(dev, "linux,rs485-enabled-at-boot-time")) rs485conf->flags |= SER_RS485_ENABLED; + + if (device_property_read_bool(dev, "rs485-rts-active-low")) { + rs485conf->flags &= ~SER_RS485_RTS_ON_SEND; + rs485conf->flags |= SER_RS485_RTS_AFTER_SEND; + } } -EXPORT_SYMBOL_GPL(of_get_rs485_mode); +EXPORT_SYMBOL_GPL(uart_get_rs485_mode); MODULE_DESCRIPTION("Serial driver core"); MODULE_LICENSE("GPL"); diff --git a/drivers/tty/serial/sh-sci.c b/drivers/tty/serial/sh-sci.c index d9f399c4e90c..7257c078e155 100644 --- a/drivers/tty/serial/sh-sci.c +++ b/drivers/tty/serial/sh-sci.c @@ -1144,7 +1144,7 @@ static ssize_t rx_fifo_timeout_store(struct device *dev, return count; } -static DEVICE_ATTR(rx_fifo_timeout, 0644, rx_fifo_timeout_show, rx_fifo_timeout_store); +static DEVICE_ATTR_RW(rx_fifo_timeout); #ifdef CONFIG_SERIAL_SH_SCI_DMA diff --git a/drivers/tty/serial/stm32-usart.h b/drivers/tty/serial/stm32-usart.h index 8a5ff54d0f42..2294d0f05872 100644 --- a/drivers/tty/serial/stm32-usart.h +++ b/drivers/tty/serial/stm32-usart.h @@ -236,7 +236,7 @@ struct stm32_usart_info stm32h7_info = { #define USART_ICR_CMCF BIT(17) /* F7 */ #define USART_ICR_WUCF BIT(20) /* H7 */ -#define STM32_SERIAL_NAME "ttyS" +#define STM32_SERIAL_NAME "ttySTM" #define STM32_MAX_PORTS 8 #define RX_BUF_L 200 /* dma rx buffer length */ diff --git a/drivers/tty/tty_io.c b/drivers/tty/tty_io.c index dc60aeea87d8..eb9133b472f4 100644 --- a/drivers/tty/tty_io.c +++ b/drivers/tty/tty_io.c @@ -144,7 +144,7 @@ static ssize_t tty_read(struct file *, char __user *, size_t, loff_t *); static ssize_t tty_write(struct file *, const char __user *, size_t, loff_t *); ssize_t redirected_tty_write(struct file *, const char __user *, size_t, loff_t *); -static unsigned int tty_poll(struct file *, poll_table *); +static __poll_t tty_poll(struct file *, poll_table *); static int tty_open(struct inode *, struct file *); long tty_ioctl(struct file *file, unsigned int cmd, unsigned long arg); #ifdef CONFIG_COMPAT @@ -443,9 +443,9 @@ static ssize_t hung_up_tty_write(struct file *file, const char __user *buf, } /* No kernel lock held - none needed ;) */ -static unsigned int hung_up_tty_poll(struct file *filp, poll_table *wait) +static __poll_t hung_up_tty_poll(struct file *filp, poll_table *wait) { - return POLLIN | POLLOUT | POLLERR | POLLHUP | POLLRDNORM | POLLWRNORM; + return EPOLLIN | EPOLLOUT | EPOLLERR | EPOLLHUP | EPOLLRDNORM | EPOLLWRNORM; } static long hung_up_tty_ioctl(struct file *file, unsigned int cmd, @@ -533,7 +533,7 @@ void tty_wakeup(struct tty_struct *tty) tty_ldisc_deref(ld); } } - wake_up_interruptible_poll(&tty->write_wait, POLLOUT); + wake_up_interruptible_poll(&tty->write_wait, EPOLLOUT); } EXPORT_SYMBOL_GPL(tty_wakeup); @@ -867,7 +867,7 @@ static ssize_t tty_read(struct file *file, char __user *buf, size_t count, static void tty_write_unlock(struct tty_struct *tty) { mutex_unlock(&tty->atomic_write_lock); - wake_up_interruptible_poll(&tty->write_wait, POLLOUT); + wake_up_interruptible_poll(&tty->write_wait, EPOLLOUT); } static int tty_write_lock(struct tty_struct *tty, int ndelay) @@ -1323,6 +1323,9 @@ struct tty_struct *tty_init_dev(struct tty_driver *driver, int idx) "%s: %s driver does not set tty->port. This will crash the kernel later. Fix the driver!\n", __func__, tty->driver->name); + retval = tty_ldisc_lock(tty, 5 * HZ); + if (retval) + goto err_release_lock; tty->port->itty = tty; /* @@ -1333,6 +1336,7 @@ struct tty_struct *tty_init_dev(struct tty_driver *driver, int idx) retval = tty_ldisc_setup(tty, tty->link); if (retval) goto err_release_tty; + tty_ldisc_unlock(tty); /* Return the tty locked so that it cannot vanish under the caller */ return tty; @@ -1345,9 +1349,11 @@ err_module_put: /* call the tty release_tty routine to clean out this slot */ err_release_tty: - tty_unlock(tty); + tty_ldisc_unlock(tty); tty_info_ratelimited(tty, "ldisc open failed (%d), clearing slot %d\n", retval, idx); +err_release_lock: + tty_unlock(tty); release_tty(tty, idx); return ERR_PTR(retval); } @@ -1476,6 +1482,8 @@ static void release_tty(struct tty_struct *tty, int idx) if (tty->link) tty->link->port->itty = NULL; tty_buffer_cancel_work(tty->port); + if (tty->link) + tty_buffer_cancel_work(tty->link->port); tty_kref_put(tty->link); tty_kref_put(tty); @@ -1659,21 +1667,21 @@ int tty_release(struct inode *inode, struct file *filp) if (tty->count <= 1) { if (waitqueue_active(&tty->read_wait)) { - wake_up_poll(&tty->read_wait, POLLIN); + wake_up_poll(&tty->read_wait, EPOLLIN); do_sleep++; } if (waitqueue_active(&tty->write_wait)) { - wake_up_poll(&tty->write_wait, POLLOUT); + wake_up_poll(&tty->write_wait, EPOLLOUT); do_sleep++; } } if (o_tty && o_tty->count <= 1) { if (waitqueue_active(&o_tty->read_wait)) { - wake_up_poll(&o_tty->read_wait, POLLIN); + wake_up_poll(&o_tty->read_wait, EPOLLIN); do_sleep++; } if (waitqueue_active(&o_tty->write_wait)) { - wake_up_poll(&o_tty->write_wait, POLLOUT); + wake_up_poll(&o_tty->write_wait, EPOLLOUT); do_sleep++; } } @@ -2055,11 +2063,11 @@ retry_open: * may be re-entered freely by other callers. */ -static unsigned int tty_poll(struct file *filp, poll_table *wait) +static __poll_t tty_poll(struct file *filp, poll_table *wait) { struct tty_struct *tty = file_tty(filp); struct tty_ldisc *ld; - int ret = 0; + __poll_t ret = 0; if (tty_paranoia_check(tty, file_inode(filp), "tty_poll")) return 0; diff --git a/drivers/tty/tty_ldisc.c b/drivers/tty/tty_ldisc.c index 24ec5c7e6b20..050f4d650891 100644 --- a/drivers/tty/tty_ldisc.c +++ b/drivers/tty/tty_ldisc.c @@ -337,7 +337,7 @@ static inline void __tty_ldisc_unlock(struct tty_struct *tty) ldsem_up_write(&tty->ldisc_sem); } -static int tty_ldisc_lock(struct tty_struct *tty, unsigned long timeout) +int tty_ldisc_lock(struct tty_struct *tty, unsigned long timeout) { int ret; @@ -348,7 +348,7 @@ static int tty_ldisc_lock(struct tty_struct *tty, unsigned long timeout) return 0; } -static void tty_ldisc_unlock(struct tty_struct *tty) +void tty_ldisc_unlock(struct tty_struct *tty) { clear_bit(TTY_LDISC_HALTED, &tty->flags); __tty_ldisc_unlock(tty); @@ -735,8 +735,8 @@ void tty_ldisc_hangup(struct tty_struct *tty, bool reinit) tty_ldisc_deref(ld); } - wake_up_interruptible_poll(&tty->write_wait, POLLOUT); - wake_up_interruptible_poll(&tty->read_wait, POLLIN); + wake_up_interruptible_poll(&tty->write_wait, EPOLLOUT); + wake_up_interruptible_poll(&tty->read_wait, EPOLLIN); /* * Shutdown the current line discipline, and reset it to diff --git a/drivers/tty/vt/selection.c b/drivers/tty/vt/selection.c index af4da9507180..7851383fbd6c 100644 --- a/drivers/tty/vt/selection.c +++ b/drivers/tty/vt/selection.c @@ -186,11 +186,7 @@ int set_selection(const struct tiocl_selection __user *sel, struct tty_struct *t } if (ps > pe) /* make sel_start <= sel_end */ - { - int tmp = ps; - ps = pe; - pe = tmp; - } + swap(ps, pe); if (sel_cons != vc_cons[fg_console].d) { clear_selection(); diff --git a/drivers/tty/vt/vc_screen.c b/drivers/tty/vt/vc_screen.c index 85b6634f518a..e4a66e1fd05f 100644 --- a/drivers/tty/vt/vc_screen.c +++ b/drivers/tty/vt/vc_screen.c @@ -559,11 +559,11 @@ unlock_out: return ret; } -static unsigned int +static __poll_t vcs_poll(struct file *file, poll_table *wait) { struct vcs_poll_data *poll = vcs_poll_data_get(file); - int ret = DEFAULT_POLLMASK|POLLERR|POLLPRI; + __poll_t ret = DEFAULT_POLLMASK|EPOLLERR|EPOLLPRI; if (poll) { poll_wait(file, &poll->waitq, wait); |