Lines Matching +full:cts +full:- +full:override
1 // SPDX-License-Identifier: GPL-2.0+
3 * altera_uart.c -- Altera UART driver
5 * Based on mcf.c -- Freescale ColdFire UART driver
7 * (C) Copyright 2003-2007, Greg Ungerer <gerg@snapgear.com>
54 #define ALTERA_UART_STATUS_DCTS_MSK 0x0400 /* CTS logic-level change */
55 #define ALTERA_UART_STATUS_CTS_MSK 0x0800 /* CTS logic state */
70 #define ALTERA_UART_CONTROL_DCTS_MSK 0x0400 /* Interrupt on CTS change */
75 * Local per-uart structure.
86 return readl(port->membase + (reg << port->regshift)); in altera_uart_readl()
91 writel(dat, port->membase + (reg << port->regshift)); in altera_uart_writel()
107 sigs |= (pp->sigs & TIOCM_RTS); in altera_uart_get_mctrl()
114 unsigned short imr = pp->imr; in altera_uart_update_ctrl_reg()
120 if (!pp->port.irq) in altera_uart_update_ctrl_reg()
123 altera_uart_writel(&pp->port, imr, ALTERA_UART_CONTROL_REG); in altera_uart_update_ctrl_reg()
130 pp->sigs = sigs; in altera_uart_set_mctrl()
132 pp->imr |= ALTERA_UART_CONTROL_RTS_MSK; in altera_uart_set_mctrl()
134 pp->imr &= ~ALTERA_UART_CONTROL_RTS_MSK; in altera_uart_set_mctrl()
142 pp->imr |= ALTERA_UART_CONTROL_TRDY_MSK; in altera_uart_start_tx()
150 pp->imr &= ~ALTERA_UART_CONTROL_TRDY_MSK; in altera_uart_stop_tx()
158 pp->imr &= ~ALTERA_UART_CONTROL_RRDY_MSK; in altera_uart_stop_rx()
168 if (break_state == -1) in altera_uart_break_ctl()
169 pp->imr |= ALTERA_UART_CONTROL_TRBK_MSK; in altera_uart_break_ctl()
171 pp->imr &= ~ALTERA_UART_CONTROL_TRBK_MSK; in altera_uart_break_ctl()
184 baudclk = port->uartclk / baud; in altera_uart_set_termios()
191 uart_update_timeout(port, termios->c_cflag, baud); in altera_uart_set_termios()
196 * FIXME: port->read_status_mask and port->ignore_status_mask in altera_uart_set_termios()
211 port->icount.rx++; in altera_uart_rx_chars()
218 port->icount.brk++; in altera_uart_rx_chars()
222 port->icount.parity++; in altera_uart_rx_chars()
224 port->icount.overrun++; in altera_uart_rx_chars()
226 port->icount.frame++; in altera_uart_rx_chars()
229 status &= port->read_status_mask; in altera_uart_rx_chars()
245 tty_flip_buffer_push(&port->state->port); in altera_uart_rx_chars()
265 isr = altera_uart_readl(port, ALTERA_UART_STATUS_REG) & pp->imr; in altera_uart_interrupt()
280 struct uart_port *port = &pp->port; in altera_uart_timer()
283 mod_timer(&pp->tmr, jiffies + uart_poll_timeout(port)); in altera_uart_timer()
288 port->type = PORT_ALTERA_UART; in altera_uart_config_port()
301 if (!port->irq) { in altera_uart_startup()
302 timer_setup(&pp->tmr, altera_uart_timer, 0); in altera_uart_startup()
303 mod_timer(&pp->tmr, jiffies + uart_poll_timeout(port)); in altera_uart_startup()
307 ret = request_irq(port->irq, altera_uart_interrupt, 0, in altera_uart_startup()
308 dev_name(port->dev), port); in altera_uart_startup()
311 "interrupt vector=%d\n", port->line, port->irq); in altera_uart_startup()
319 pp->imr = ALTERA_UART_CONTROL_RRDY_MSK; in altera_uart_startup()
335 pp->imr = 0; in altera_uart_shutdown()
340 if (port->irq) in altera_uart_shutdown()
341 free_irq(port->irq, port); in altera_uart_shutdown()
343 del_timer_sync(&pp->tmr); in altera_uart_shutdown()
348 return (port->type == PORT_ALTERA_UART) ? "Altera UART" : NULL; in altera_uart_type()
365 if ((ser->type != PORT_UNKNOWN) && (ser->type != PORT_ALTERA_UART)) in altera_uart_verify_port()
366 return -EINVAL; in altera_uart_verify_port()
431 struct uart_port *port = &(altera_uart_ports + co->index)->port; in altera_uart_console_write()
444 if (co->index < 0 || co->index >= CONFIG_SERIAL_ALTERA_UART_MAXPORTS) in altera_uart_console_setup()
445 return -EINVAL; in altera_uart_console_setup()
446 port = &altera_uart_ports[co->index].port; in altera_uart_console_setup()
447 if (!port->membase) in altera_uart_console_setup()
448 return -ENODEV; in altera_uart_console_setup()
464 .index = -1,
481 struct earlycon_device *dev = co->data; in altera_uart_earlycon_write()
483 uart_console_write(&dev->port, s, count, altera_uart_console_putc); in altera_uart_earlycon_write()
489 struct uart_port *port = &dev->port; in altera_uart_earlycon_setup()
491 if (!port->membase) in altera_uart_earlycon_setup()
492 return -ENODEV; in altera_uart_earlycon_setup()
498 if (dev->baud) { in altera_uart_earlycon_setup()
499 unsigned int baudclk = port->uartclk / dev->baud; in altera_uart_earlycon_setup()
504 dev->con->write = altera_uart_earlycon_write; in altera_uart_earlycon_setup()
508 OF_EARLYCON_DECLARE(uart, "altr,uart-1.0", altera_uart_earlycon_setup);
531 struct altera_uart_platform_uart *platp = dev_get_platdata(&pdev->dev); in altera_uart_probe()
534 int i = pdev->id; in altera_uart_probe()
537 /* if id is -1 scan for a free id and use that one */ in altera_uart_probe()
538 if (i == -1) { in altera_uart_probe()
545 return -EINVAL; in altera_uart_probe()
551 port->mapbase = res_mem->start; in altera_uart_probe()
553 port->mapbase = platp->mapbase; in altera_uart_probe()
555 return -EINVAL; in altera_uart_probe()
558 if (ret < 0 && ret != -ENXIO) in altera_uart_probe()
561 port->irq = ret; in altera_uart_probe()
563 port->irq = platp->irq; in altera_uart_probe()
565 /* Check platform data first so we can override device node data */ in altera_uart_probe()
567 port->uartclk = platp->uartclk; in altera_uart_probe()
569 ret = of_property_read_u32(pdev->dev.of_node, "clock-frequency", in altera_uart_probe()
570 &port->uartclk); in altera_uart_probe()
575 port->membase = ioremap(port->mapbase, ALTERA_UART_SIZE); in altera_uart_probe()
576 if (!port->membase) in altera_uart_probe()
577 return -ENOMEM; in altera_uart_probe()
580 port->regshift = platp->bus_shift; in altera_uart_probe()
582 port->regshift = 0; in altera_uart_probe()
584 port->line = i; in altera_uart_probe()
585 port->type = PORT_ALTERA_UART; in altera_uart_probe()
586 port->iotype = SERIAL_IO_MEM; in altera_uart_probe()
587 port->ops = &altera_uart_ops; in altera_uart_probe()
588 port->flags = UPF_BOOT_AUTOCONF; in altera_uart_probe()
589 port->dev = &pdev->dev; in altera_uart_probe()
604 port->mapbase = 0; in altera_uart_remove()
605 iounmap(port->membase); in altera_uart_remove()
611 { .compatible = "ALTR,uart-1.0", },
612 { .compatible = "altr,uart-1.0", },