Lines Matching refs:port
73 static inline unsigned int bcm_uart_readl(struct uart_port *port,
76 return __raw_readl(port->membase + offset);
79 static inline void bcm_uart_writel(struct uart_port *port,
82 __raw_writel(value, port->membase + offset);
88 static unsigned int bcm_uart_tx_empty(struct uart_port *port)
92 val = bcm_uart_readl(port, UART_IR_REG);
99 static void bcm_uart_set_mctrl(struct uart_port *port, unsigned int mctrl)
103 val = bcm_uart_readl(port, UART_MCTL_REG);
110 bcm_uart_writel(port, val, UART_MCTL_REG);
112 val = bcm_uart_readl(port, UART_CTL_REG);
117 bcm_uart_writel(port, val, UART_CTL_REG);
123 static unsigned int bcm_uart_get_mctrl(struct uart_port *port)
128 val = bcm_uart_readl(port, UART_EXTINP_REG);
143 static void bcm_uart_stop_tx(struct uart_port *port)
147 val = bcm_uart_readl(port, UART_CTL_REG);
149 bcm_uart_writel(port, val, UART_CTL_REG);
151 val = bcm_uart_readl(port, UART_IR_REG);
153 bcm_uart_writel(port, val, UART_IR_REG);
159 static void bcm_uart_start_tx(struct uart_port *port)
163 val = bcm_uart_readl(port, UART_IR_REG);
165 bcm_uart_writel(port, val, UART_IR_REG);
167 val = bcm_uart_readl(port, UART_CTL_REG);
169 bcm_uart_writel(port, val, UART_CTL_REG);
173 * serial core request to stop rx, called before port shutdown
175 static void bcm_uart_stop_rx(struct uart_port *port)
179 val = bcm_uart_readl(port, UART_IR_REG);
181 bcm_uart_writel(port, val, UART_IR_REG);
187 static void bcm_uart_enable_ms(struct uart_port *port)
191 val = bcm_uart_readl(port, UART_IR_REG);
193 bcm_uart_writel(port, val, UART_IR_REG);
199 static void bcm_uart_break_ctl(struct uart_port *port, int ctl)
204 spin_lock_irqsave(&port->lock, flags);
206 val = bcm_uart_readl(port, UART_CTL_REG);
211 bcm_uart_writel(port, val, UART_CTL_REG);
213 spin_unlock_irqrestore(&port->lock, flags);
217 * return port type in string format
219 static const char *bcm_uart_type(struct uart_port *port)
221 return (port->type == PORT_BCM63XX) ? "bcm63xx_uart" : NULL;
227 static void bcm_uart_do_rx(struct uart_port *port)
229 struct tty_port *tty_port = &port->state->port;
234 * serial port */
242 iestat = bcm_uart_readl(port, UART_IR_REG);
249 val = bcm_uart_readl(port, UART_CTL_REG);
251 bcm_uart_writel(port, val, UART_CTL_REG);
253 port->icount.overrun++;
260 cstat = c = bcm_uart_readl(port, UART_FIFO_REG);
261 port->icount.rx++;
268 port->icount.brk++;
269 if (uart_handle_break(port))
274 port->icount.parity++;
276 port->icount.frame++;
279 cstat &= port->read_status_mask;
288 if (uart_handle_sysrq_char(port, c))
292 if ((cstat & port->ignore_status_mask) == 0)
297 spin_unlock(&port->lock);
299 spin_lock(&port->lock);
306 static void bcm_uart_do_tx(struct uart_port *port)
311 if (port->x_char) {
312 bcm_uart_writel(port, port->x_char, UART_FIFO_REG);
313 port->icount.tx++;
314 port->x_char = 0;
318 if (uart_tx_stopped(port)) {
319 bcm_uart_stop_tx(port);
323 xmit = &port->state->xmit;
327 val = bcm_uart_readl(port, UART_MCTL_REG);
329 max_count = port->fifosize - val;
335 bcm_uart_writel(port, c, UART_FIFO_REG);
337 port->icount.tx++;
343 uart_write_wakeup(port);
351 val = bcm_uart_readl(port, UART_IR_REG);
353 bcm_uart_writel(port, val, UART_IR_REG);
362 struct uart_port *port;
365 port = dev_id;
366 spin_lock(&port->lock);
368 irqstat = bcm_uart_readl(port, UART_IR_REG);
370 bcm_uart_do_rx(port);
373 bcm_uart_do_tx(port);
378 estat = bcm_uart_readl(port, UART_EXTINP_REG);
380 uart_handle_cts_change(port,
383 uart_handle_dcd_change(port,
387 spin_unlock(&port->lock);
394 static void bcm_uart_enable(struct uart_port *port)
398 val = bcm_uart_readl(port, UART_CTL_REG);
400 bcm_uart_writel(port, val, UART_CTL_REG);
406 static void bcm_uart_disable(struct uart_port *port)
410 val = bcm_uart_readl(port, UART_CTL_REG);
413 bcm_uart_writel(port, val, UART_CTL_REG);
419 static void bcm_uart_flush(struct uart_port *port)
424 val = bcm_uart_readl(port, UART_CTL_REG);
426 bcm_uart_writel(port, val, UART_CTL_REG);
430 (void)bcm_uart_readl(port, UART_FIFO_REG);
436 static int bcm_uart_startup(struct uart_port *port)
441 /* mask all irq and flush port */
442 bcm_uart_disable(port);
443 bcm_uart_writel(port, 0, UART_IR_REG);
444 bcm_uart_flush(port);
447 (void)bcm_uart_readl(port, UART_EXTINP_REG);
450 val = bcm_uart_readl(port, UART_MCTL_REG);
452 val |= (port->fifosize / 2) << UART_MCTL_RXFIFOTHRESH_SHIFT;
453 val |= (port->fifosize / 2) << UART_MCTL_TXFIFOTHRESH_SHIFT;
454 bcm_uart_writel(port, val, UART_MCTL_REG);
457 val = bcm_uart_readl(port, UART_CTL_REG);
460 bcm_uart_writel(port, val, UART_CTL_REG);
466 bcm_uart_writel(port, val, UART_EXTINP_REG);
469 ret = request_irq(port->irq, bcm_uart_interrupt, 0,
470 dev_name(port->dev), port);
473 bcm_uart_writel(port, UART_RX_INT_MASK, UART_IR_REG);
474 bcm_uart_enable(port);
481 static void bcm_uart_shutdown(struct uart_port *port)
485 spin_lock_irqsave(&port->lock, flags);
486 bcm_uart_writel(port, 0, UART_IR_REG);
487 spin_unlock_irqrestore(&port->lock, flags);
489 bcm_uart_disable(port);
490 bcm_uart_flush(port);
491 free_irq(port->irq, port);
497 static void bcm_uart_set_termios(struct uart_port *port,
505 spin_lock_irqsave(&port->lock, flags);
508 for (tries = 3; !bcm_uart_tx_empty(port) && tries; tries--)
512 bcm_uart_disable(port);
513 bcm_uart_flush(port);
516 ctl = bcm_uart_readl(port, UART_CTL_REG);
546 bcm_uart_writel(port, ctl, UART_CTL_REG);
549 baud = uart_get_baud_rate(port, new, old, 0, port->uartclk / 16);
550 quot = uart_get_divisor(port, baud) - 1;
551 bcm_uart_writel(port, quot, UART_BAUD_REG);
554 ier = bcm_uart_readl(port, UART_IR_REG);
557 if (UART_ENABLE_MS(port, new->c_cflag))
560 bcm_uart_writel(port, ier, UART_IR_REG);
563 port->read_status_mask = UART_FIFO_VALID_MASK;
565 port->read_status_mask |= UART_FIFO_FRAMEERR_MASK;
566 port->read_status_mask |= UART_FIFO_PARERR_MASK;
569 port->read_status_mask |= UART_FIFO_BRKDET_MASK;
571 port->ignore_status_mask = 0;
573 port->ignore_status_mask |= UART_FIFO_PARERR_MASK;
575 port->ignore_status_mask |= UART_FIFO_BRKDET_MASK;
577 port->ignore_status_mask |= UART_FIFO_VALID_MASK;
579 uart_update_timeout(port, new->c_cflag, baud);
580 bcm_uart_enable(port);
581 spin_unlock_irqrestore(&port->lock, flags);
587 static int bcm_uart_request_port(struct uart_port *port)
596 static void bcm_uart_release_port(struct uart_port *port)
602 * serial core request to do any port required autoconfiguration
604 static void bcm_uart_config_port(struct uart_port *port, int flags)
607 if (bcm_uart_request_port(port))
609 port->type = PORT_BCM63XX;
614 * serial core request to check that port information in serinfo are
617 static int bcm_uart_verify_port(struct uart_port *port,
620 if (port->type != PORT_BCM63XX)
622 if (port->irq != serinfo->irq)
624 if (port->iotype != serinfo->io_type)
626 if (port->mapbase != (unsigned long)serinfo->iomem_base)
654 static void wait_for_xmitr(struct uart_port *port)
663 val = bcm_uart_readl(port, UART_IR_REG);
670 if (port->flags & UPF_CONS_FLOW) {
675 val = bcm_uart_readl(port, UART_EXTINP_REG);
686 static void bcm_console_putchar(struct uart_port *port, int ch)
688 wait_for_xmitr(port);
689 bcm_uart_writel(port, ch, UART_FIFO_REG);
698 struct uart_port *port;
702 port = &ports[co->index];
705 if (port->sysrq) {
709 locked = spin_trylock(&port->lock);
711 spin_lock(&port->lock);
716 uart_console_write(port, s, count, bcm_console_putchar);
719 wait_for_xmitr(port);
722 spin_unlock(&port->lock);
728 * port and setup it.
732 struct uart_port *port;
740 port = &ports[co->index];
741 if (!port->membase)
746 return uart_set_options(port, co, baud, parity, bits, flow);
773 uart_console_write(&dev->port, s, n, bcm_console_putchar);
774 wait_for_xmitr(&dev->port);
780 if (!device->port.membase)
810 struct uart_port *port;
824 port = &ports[pdev->id];
825 if (port->membase)
827 memset(port, 0, sizeof(*port));
833 port->mapbase = res_mem->start;
834 port->membase = devm_ioremap_resource(&pdev->dev, res_mem);
835 if (IS_ERR(port->membase))
836 return PTR_ERR(port->membase);
849 port->iotype = UPIO_MEM;
850 port->irq = res_irq->start;
851 port->ops = &bcm_uart_ops;
852 port->flags = UPF_BOOT_AUTOCONF;
853 port->dev = &pdev->dev;
854 port->fifosize = 16;
855 port->uartclk = clk_get_rate(clk) / 2;
856 port->line = pdev->id;
857 port->has_sysrq = IS_ENABLED(CONFIG_SERIAL_BCM63XX_CONSOLE);
860 ret = uart_add_one_port(&bcm_uart_driver, port);
865 platform_set_drvdata(pdev, port);
871 struct uart_port *port;
873 port = platform_get_drvdata(pdev);
874 uart_remove_one_port(&bcm_uart_driver, port);
875 /* mark port as free */