static int uart_open(struct tty_struct *tty, struct file *filp) { struct uart_driver *drv = (struct uart_driver *)tty->driver->driver_state; int retval, line = tty->index; struct uart_state *state = drv->state + line; struct tty_port *port = &state->port; pr_debug("uart_open(%d) called\n", line); if (mutex_lock_interruptible(&port->mutex)) { retval = -ERESTARTSYS; goto end; } port->count++; if (!state->uart_port || state->uart_port->flags & UPF_DEAD) { retval = -ENXIO; goto err_dec_count; } tty->driver_data = state; state->uart_port->state = state; tty->low_latency = (state->uart_port->flags & UPF_LOW_LATENCY) ? 1 : 0; tty_port_tty_set(port, tty); if (tty_hung_up_p(filp)) { retval = -EAGAIN; goto err_dec_count; } if (port->count == 1) uart_change_pm(state, 0); retval = uart_startup(tty, state, 0); mutex_unlock(&port->mutex); if (retval == 0) retval = tty_port_block_til_ready(port, tty, filp); end: return retval; err_dec_count: port->count--; mutex_unlock(&port->mutex); goto end; }
/* * This routine is called whenever a serial port is opened. It * enables interrupts for a serial port, linking in its async structure into * the IRQ chain. It also performs the serial-specific * initialization for the tty structure. */ static int rs_open(struct tty_struct *tty, struct file * filp) { struct serial_state *info = rs_table + tty->index; struct tty_port *port = &info->tport; int retval; port->count++; port->tty = tty; tty->driver_data = info; tty->port = port; if (serial_paranoia_check(info, tty->name, "rs_open")) return -ENODEV; tty->low_latency = (port->flags & ASYNC_LOW_LATENCY) ? 1 : 0; retval = startup(tty, info); if (retval) { return retval; } return tty_port_block_til_ready(port, tty, filp); }
/* * This routine is called whenever a serial port is opened. It * enables interrupts for a serial port, linking in its S structure into * the IRQ chain. It also performs the serial-specific * initialization for the tty structure. */ int rs_open(struct tty_struct *tty, struct file * filp) { struct m68k_serial *info; int retval; info = &m68k_soft[tty->index]; if (serial_paranoia_check(info, tty->name, "rs_open")) return -ENODEV; info->tport.count++; tty->driver_data = info; tty_port_tty_set(&info->tport, tty); /* * Start up serial port */ retval = startup(info, tty); if (retval) return retval; return tty_port_block_til_ready(&info->tport, tty, filp); }
static int acm_tty_open(struct tty_struct *tty, struct file *filp) { struct acm *acm; int rv = -ENODEV; int i; dbg("Entering acm_tty_open."); mutex_lock(&open_mutex); acm = acm_table[tty->index]; if (!acm || !acm->dev) goto out; else rv = 0; set_bit(TTY_NO_WRITE_SPLIT, &tty->flags); tty->driver_data = acm; tty_port_tty_set(&acm->port, tty); if (usb_autopm_get_interface(acm->control) < 0) goto early_bail; else acm->control->needs_remote_wakeup = 1; mutex_lock(&acm->mutex); if (acm->port.count++) { mutex_unlock(&acm->mutex); usb_autopm_put_interface(acm->control); goto out; } acm->ctrlurb->dev = acm->dev; if (usb_submit_urb(acm->ctrlurb, GFP_KERNEL)) { dbg("usb_submit_urb(ctrl irq) failed"); goto bail_out; } if (0 > acm_set_control(acm, acm->ctrlout = ACM_CTRL_DTR | ACM_CTRL_RTS) && (acm->ctrl_caps & USB_CDC_CAP_LINE)) goto full_bailout; /* enorcar*/ acm->state &= ~ACM_ABS_IDLE; if (0 > acm_set_comm_feature(acm, ACM_ABSTRACT_STATE, &acm->state) && (acm->ctrl_caps & USB_CDC_COMM_FEATURE)) goto full_bailout; usb_autopm_put_interface(acm->control); INIT_LIST_HEAD(&acm->spare_read_urbs); INIT_LIST_HEAD(&acm->spare_read_bufs); INIT_LIST_HEAD(&acm->filled_read_bufs); for (i = 0; i < acm->rx_buflimit; i++) list_add(&(acm->ru[i].list), &acm->spare_read_urbs); for (i = 0; i < acm->rx_buflimit; i++) list_add(&(acm->rb[i].list), &acm->spare_read_bufs); acm->throttle = 0; set_bit(ASYNCB_INITIALIZED, &acm->port.flags); rv = tty_port_block_til_ready(&acm->port, tty, filp); tasklet_schedule(&acm->urb_task); mutex_unlock(&acm->mutex); out: mutex_unlock(&open_mutex); return rv; full_bailout: usb_kill_urb(acm->ctrlurb); bail_out: acm->port.count--; mutex_unlock(&acm->mutex); usb_autopm_put_interface(acm->control); early_bail: mutex_unlock(&open_mutex); tty_port_tty_set(&acm->port, NULL); return -EIO; }
static int acm_tty_open(struct tty_struct *tty, struct file *filp) { struct acm *acm; int rv = -ENODEV; mutex_lock(&open_mutex); acm = acm_table[tty->index]; if (!acm || !acm->dev) goto out; else rv = 0; dev_dbg(&acm->control->dev, "%s\n", __func__); set_bit(TTY_NO_WRITE_SPLIT, &tty->flags); tty->driver_data = acm; tty_port_tty_set(&acm->port, tty); if (usb_autopm_get_interface(acm->control) < 0) goto early_bail; else acm->control->needs_remote_wakeup = 1; mutex_lock(&acm->mutex); if (acm->port.count++) { mutex_unlock(&acm->mutex); usb_autopm_put_interface(acm->control); goto out; } acm->ctrlurb->dev = acm->dev; if (usb_submit_urb(acm->ctrlurb, GFP_KERNEL)) { dev_err(&acm->control->dev, "%s - usb_submit_urb(ctrl irq) failed\n", __func__); goto bail_out; } if (0 > acm_set_control(acm, acm->ctrlout = ACM_CTRL_DTR | ACM_CTRL_RTS) && (acm->ctrl_caps & USB_CDC_CAP_LINE)) goto bail_out; usb_autopm_put_interface(acm->control); /* * Unthrottle device in case the TTY was closed while throttled. */ spin_lock_irq(&acm->read_lock); acm->throttled = 0; acm->throttle_req = 0; spin_unlock_irq(&acm->read_lock); if (acm_submit_read_urbs(acm, GFP_KERNEL)) goto bail_out; set_bit(ASYNCB_INITIALIZED, &acm->port.flags); rv = tty_port_block_til_ready(&acm->port, tty, filp); mutex_unlock(&acm->mutex); out: mutex_unlock(&open_mutex); return rv; bail_out: acm->port.count--; mutex_unlock(&acm->mutex); usb_autopm_put_interface(acm->control); early_bail: mutex_unlock(&open_mutex); tty_port_tty_set(&acm->port, NULL); return -EIO; }
static int acm_tty_open(struct tty_struct *tty, struct file *filp) { struct acm *acm; int rv = -ENODEV; mutex_lock(&open_mutex); acm = acm_table[tty->index]; if (!acm || !acm->dev) goto out; else rv = 0; dev_dbg(&acm->control->dev, "%s\n", __func__); set_bit(TTY_NO_WRITE_SPLIT, &tty->flags); tty->driver_data = acm; tty_port_tty_set(&acm->port, tty); if (usb_autopm_get_interface(acm->control) < 0) goto early_bail; else acm->control->needs_remote_wakeup = 0; mutex_lock(&acm->mutex); if (acm->port.count++) { mutex_unlock(&acm->mutex); usb_autopm_put_interface(acm->control); goto out; } if (acm_submit_read_urbs(acm, GFP_KERNEL)) goto bail_out; acm->ctrlurb->dev = acm->dev; if (usb_submit_urb(acm->ctrlurb, GFP_KERNEL)) { dev_err(&acm->control->dev, "%s - usb_submit_urb(ctrl irq) failed\n", __func__); goto bail_out; } if (0 > acm_set_control(acm, acm->ctrlout = ACM_CTRL_DTR | ACM_CTRL_RTS) && (acm->ctrl_caps & USB_CDC_CAP_LINE)) goto bail_out; // enorcar acm->state &= ~ACM_ABS_IDLE; if (0 > acm_set_comm_feature(acm, ACM_ABSTRACT_STATE, &acm->state) && (acm->ctrl_caps & USB_CDC_COMM_FEATURE)) goto bail_out; usb_autopm_put_interface(acm->control); set_bit(ASYNCB_INITIALIZED, &acm->port.flags); rv = tty_port_block_til_ready(&acm->port, tty, filp); mutex_unlock(&acm->mutex); out: mutex_unlock(&open_mutex); return rv; bail_out: acm->port.count--; mutex_unlock(&acm->mutex); usb_autopm_put_interface(acm->control); early_bail: mutex_unlock(&open_mutex); tty_port_tty_set(&acm->port, NULL); return -EIO; }