Lines Matching +full:port +full:-
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 <[email protected]>
53 #define ALTERA_UART_STATUS_DCTS_MSK 0x0400 /* CTS logic-level change */
74 * Local per-uart structure.
77 struct uart_port port; member
83 static u32 altera_uart_readl(struct uart_port *port, int reg) in altera_uart_readl() argument
85 return readl(port->membase + (reg << port->regshift)); in altera_uart_readl()
88 static void altera_uart_writel(struct uart_port *port, u32 dat, int reg) in altera_uart_writel() argument
90 writel(dat, port->membase + (reg << port->regshift)); in altera_uart_writel()
93 static unsigned int altera_uart_tx_empty(struct uart_port *port) in altera_uart_tx_empty() argument
95 return (altera_uart_readl(port, ALTERA_UART_STATUS_REG) & in altera_uart_tx_empty()
99 static unsigned int altera_uart_get_mctrl(struct uart_port *port) in altera_uart_get_mctrl() argument
101 struct altera_uart *pp = container_of(port, struct altera_uart, port); in altera_uart_get_mctrl()
104 sigs = (altera_uart_readl(port, ALTERA_UART_STATUS_REG) & in altera_uart_get_mctrl()
106 sigs |= (pp->sigs & TIOCM_RTS); in altera_uart_get_mctrl()
113 unsigned short imr = pp->imr; in altera_uart_update_ctrl_reg()
119 if (!pp->port.irq) in altera_uart_update_ctrl_reg()
122 altera_uart_writel(&pp->port, imr, ALTERA_UART_CONTROL_REG); in altera_uart_update_ctrl_reg()
125 static void altera_uart_set_mctrl(struct uart_port *port, unsigned int sigs) in altera_uart_set_mctrl() argument
127 struct altera_uart *pp = container_of(port, struct altera_uart, port); in altera_uart_set_mctrl()
129 pp->sigs = sigs; in altera_uart_set_mctrl()
131 pp->imr |= ALTERA_UART_CONTROL_RTS_MSK; in altera_uart_set_mctrl()
133 pp->imr &= ~ALTERA_UART_CONTROL_RTS_MSK; in altera_uart_set_mctrl()
137 static void altera_uart_start_tx(struct uart_port *port) in altera_uart_start_tx() argument
139 struct altera_uart *pp = container_of(port, struct altera_uart, port); in altera_uart_start_tx()
141 pp->imr |= ALTERA_UART_CONTROL_TRDY_MSK; in altera_uart_start_tx()
145 static void altera_uart_stop_tx(struct uart_port *port) in altera_uart_stop_tx() argument
147 struct altera_uart *pp = container_of(port, struct altera_uart, port); in altera_uart_stop_tx()
149 pp->imr &= ~ALTERA_UART_CONTROL_TRDY_MSK; in altera_uart_stop_tx()
153 static void altera_uart_stop_rx(struct uart_port *port) in altera_uart_stop_rx() argument
155 struct altera_uart *pp = container_of(port, struct altera_uart, port); in altera_uart_stop_rx()
157 pp->imr &= ~ALTERA_UART_CONTROL_RRDY_MSK; in altera_uart_stop_rx()
161 static void altera_uart_break_ctl(struct uart_port *port, int break_state) in altera_uart_break_ctl() argument
163 struct altera_uart *pp = container_of(port, struct altera_uart, port); in altera_uart_break_ctl()
166 uart_port_lock_irqsave(port, &flags); in altera_uart_break_ctl()
167 if (break_state == -1) in altera_uart_break_ctl()
168 pp->imr |= ALTERA_UART_CONTROL_TRBK_MSK; in altera_uart_break_ctl()
170 pp->imr &= ~ALTERA_UART_CONTROL_TRBK_MSK; in altera_uart_break_ctl()
172 uart_port_unlock_irqrestore(port, flags); in altera_uart_break_ctl()
175 static void altera_uart_set_termios(struct uart_port *port, in altera_uart_set_termios() argument
182 baud = uart_get_baud_rate(port, termios, old, 0, 4000000); in altera_uart_set_termios()
183 baudclk = port->uartclk / baud; in altera_uart_set_termios()
189 uart_port_lock_irqsave(port, &flags); in altera_uart_set_termios()
190 uart_update_timeout(port, termios->c_cflag, baud); in altera_uart_set_termios()
191 altera_uart_writel(port, baudclk, ALTERA_UART_DIVISOR_REG); in altera_uart_set_termios()
192 uart_port_unlock_irqrestore(port, flags); in altera_uart_set_termios()
195 * FIXME: port->read_status_mask and port->ignore_status_mask in altera_uart_set_termios()
201 static void altera_uart_rx_chars(struct uart_port *port) in altera_uart_rx_chars() argument
206 while ((status = altera_uart_readl(port, ALTERA_UART_STATUS_REG)) & in altera_uart_rx_chars()
208 ch = altera_uart_readl(port, ALTERA_UART_RXDATA_REG); in altera_uart_rx_chars()
210 port->icount.rx++; in altera_uart_rx_chars()
213 altera_uart_writel(port, status, in altera_uart_rx_chars()
217 port->icount.brk++; in altera_uart_rx_chars()
218 if (uart_handle_break(port)) in altera_uart_rx_chars()
221 port->icount.parity++; in altera_uart_rx_chars()
223 port->icount.overrun++; in altera_uart_rx_chars()
225 port->icount.frame++; in altera_uart_rx_chars()
228 status &= port->read_status_mask; in altera_uart_rx_chars()
238 if (uart_handle_sysrq_char(port, ch)) in altera_uart_rx_chars()
240 uart_insert_char(port, status, ALTERA_UART_STATUS_ROE_MSK, ch, in altera_uart_rx_chars()
244 tty_flip_buffer_push(&port->state->port); in altera_uart_rx_chars()
247 static void altera_uart_tx_chars(struct uart_port *port) in altera_uart_tx_chars() argument
251 uart_port_tx(port, ch, in altera_uart_tx_chars()
252 altera_uart_readl(port, ALTERA_UART_STATUS_REG) & in altera_uart_tx_chars()
254 altera_uart_writel(port, ch, ALTERA_UART_TXDATA_REG)); in altera_uart_tx_chars()
259 struct uart_port *port = data; in altera_uart_interrupt() local
260 struct altera_uart *pp = container_of(port, struct altera_uart, port); in altera_uart_interrupt()
264 isr = altera_uart_readl(port, ALTERA_UART_STATUS_REG) & pp->imr; in altera_uart_interrupt()
266 uart_port_lock_irqsave(port, &flags); in altera_uart_interrupt()
268 altera_uart_rx_chars(port); in altera_uart_interrupt()
270 altera_uart_tx_chars(port); in altera_uart_interrupt()
271 uart_port_unlock_irqrestore(port, flags); in altera_uart_interrupt()
279 struct uart_port *port = &pp->port; in altera_uart_timer() local
281 altera_uart_interrupt(0, port); in altera_uart_timer()
282 mod_timer(&pp->tmr, jiffies + uart_poll_timeout(port)); in altera_uart_timer()
285 static void altera_uart_config_port(struct uart_port *port, int flags) in altera_uart_config_port() argument
287 port->type = PORT_ALTERA_UART; in altera_uart_config_port()
290 altera_uart_writel(port, 0, ALTERA_UART_CONTROL_REG); in altera_uart_config_port()
292 altera_uart_writel(port, 0, ALTERA_UART_STATUS_REG); in altera_uart_config_port()
295 static int altera_uart_startup(struct uart_port *port) in altera_uart_startup() argument
297 struct altera_uart *pp = container_of(port, struct altera_uart, port); in altera_uart_startup()
300 if (!port->irq) { in altera_uart_startup()
301 timer_setup(&pp->tmr, altera_uart_timer, 0); in altera_uart_startup()
302 mod_timer(&pp->tmr, jiffies + uart_poll_timeout(port)); in altera_uart_startup()
306 ret = request_irq(port->irq, altera_uart_interrupt, 0, in altera_uart_startup()
307 dev_name(port->dev), port); in altera_uart_startup()
309 dev_err(port->dev, "unable to attach Altera UART %d interrupt vector=%d\n", in altera_uart_startup()
310 port->line, port->irq); in altera_uart_startup()
315 uart_port_lock_irqsave(port, &flags); in altera_uart_startup()
318 pp->imr = ALTERA_UART_CONTROL_RRDY_MSK; in altera_uart_startup()
321 uart_port_unlock_irqrestore(port, flags); in altera_uart_startup()
326 static void altera_uart_shutdown(struct uart_port *port) in altera_uart_shutdown() argument
328 struct altera_uart *pp = container_of(port, struct altera_uart, port); in altera_uart_shutdown()
331 uart_port_lock_irqsave(port, &flags); in altera_uart_shutdown()
334 pp->imr = 0; in altera_uart_shutdown()
337 uart_port_unlock_irqrestore(port, flags); in altera_uart_shutdown()
339 if (port->irq) in altera_uart_shutdown()
340 free_irq(port->irq, port); in altera_uart_shutdown()
342 del_timer_sync(&pp->tmr); in altera_uart_shutdown()
345 static const char *altera_uart_type(struct uart_port *port) in altera_uart_type() argument
347 return (port->type == PORT_ALTERA_UART) ? "Altera UART" : NULL; in altera_uart_type()
350 static int altera_uart_request_port(struct uart_port *port) in altera_uart_request_port() argument
356 static void altera_uart_release_port(struct uart_port *port) in altera_uart_release_port() argument
361 static int altera_uart_verify_port(struct uart_port *port, in altera_uart_verify_port() argument
364 if ((ser->type != PORT_UNKNOWN) && (ser->type != PORT_ALTERA_UART)) in altera_uart_verify_port()
365 return -EINVAL; in altera_uart_verify_port()
370 static int altera_uart_poll_get_char(struct uart_port *port) in altera_uart_poll_get_char() argument
372 while (!(altera_uart_readl(port, ALTERA_UART_STATUS_REG) & in altera_uart_poll_get_char()
376 return altera_uart_readl(port, ALTERA_UART_RXDATA_REG); in altera_uart_poll_get_char()
379 static void altera_uart_poll_put_char(struct uart_port *port, unsigned char c) in altera_uart_poll_put_char() argument
381 while (!(altera_uart_readl(port, ALTERA_UART_STATUS_REG) & in altera_uart_poll_put_char()
385 altera_uart_writel(port, c, ALTERA_UART_TXDATA_REG); in altera_uart_poll_put_char()
418 static void altera_uart_console_putc(struct uart_port *port, unsigned char c) in altera_uart_console_putc() argument
420 while (!(altera_uart_readl(port, ALTERA_UART_STATUS_REG) & in altera_uart_console_putc()
424 altera_uart_writel(port, c, ALTERA_UART_TXDATA_REG); in altera_uart_console_putc()
430 struct uart_port *port = &(altera_uart_ports + co->index)->port; in altera_uart_console_write() local
432 uart_console_write(port, s, count, altera_uart_console_putc); in altera_uart_console_write()
437 struct uart_port *port; in altera_uart_console_setup() local
443 if (co->index < 0 || co->index >= CONFIG_SERIAL_ALTERA_UART_MAXPORTS) in altera_uart_console_setup()
444 return -EINVAL; in altera_uart_console_setup()
445 port = &altera_uart_ports[co->index].port; in altera_uart_console_setup()
446 if (!port->membase) in altera_uart_console_setup()
447 return -ENODEV; in altera_uart_console_setup()
452 return uart_set_options(port, co, baud, parity, bits, flow); in altera_uart_console_setup()
463 .index = -1,
480 struct earlycon_device *dev = co->data; in altera_uart_earlycon_write()
482 uart_console_write(&dev->port, s, count, altera_uart_console_putc); in altera_uart_earlycon_write()
488 struct uart_port *port = &dev->port; in altera_uart_earlycon_setup() local
490 if (!port->membase) in altera_uart_earlycon_setup()
491 return -ENODEV; in altera_uart_earlycon_setup()
494 altera_uart_writel(port, ALTERA_UART_CONTROL_RRDY_MSK, in altera_uart_earlycon_setup()
497 if (dev->baud) { in altera_uart_earlycon_setup()
498 unsigned int baudclk = port->uartclk / dev->baud; in altera_uart_earlycon_setup()
500 altera_uart_writel(port, baudclk, ALTERA_UART_DIVISOR_REG); in altera_uart_earlycon_setup()
503 dev->con->write = altera_uart_earlycon_write; in altera_uart_earlycon_setup()
507 OF_EARLYCON_DECLARE(uart, "altr,uart-1.0", altera_uart_earlycon_setup);
530 struct altera_uart_platform_uart *platp = dev_get_platdata(&pdev->dev); in altera_uart_probe()
531 struct uart_port *port; in altera_uart_probe() local
533 int i = pdev->id; in altera_uart_probe()
536 /* if id is -1 scan for a free id and use that one */ in altera_uart_probe()
537 if (i == -1) { in altera_uart_probe()
539 if (altera_uart_ports[i].port.mapbase == 0) in altera_uart_probe()
544 return -EINVAL; in altera_uart_probe()
546 port = &altera_uart_ports[i].port; in altera_uart_probe()
550 port->mapbase = res_mem->start; in altera_uart_probe()
552 port->mapbase = platp->mapbase; in altera_uart_probe()
554 return -EINVAL; in altera_uart_probe()
557 if (ret < 0 && ret != -ENXIO) in altera_uart_probe()
560 port->irq = ret; in altera_uart_probe()
562 port->irq = platp->irq; in altera_uart_probe()
566 port->uartclk = platp->uartclk; in altera_uart_probe()
568 ret = of_property_read_u32(pdev->dev.of_node, "clock-frequency", in altera_uart_probe()
569 &port->uartclk); in altera_uart_probe()
574 port->membase = ioremap(port->mapbase, ALTERA_UART_SIZE); in altera_uart_probe()
575 if (!port->membase) in altera_uart_probe()
576 return -ENOMEM; in altera_uart_probe()
579 port->regshift = platp->bus_shift; in altera_uart_probe()
581 port->regshift = 0; in altera_uart_probe()
583 port->line = i; in altera_uart_probe()
584 port->type = PORT_ALTERA_UART; in altera_uart_probe()
585 port->iotype = SERIAL_IO_MEM; in altera_uart_probe()
586 port->ops = &altera_uart_ops; in altera_uart_probe()
587 port->flags = UPF_BOOT_AUTOCONF; in altera_uart_probe()
588 port->dev = &pdev->dev; in altera_uart_probe()
590 platform_set_drvdata(pdev, port); in altera_uart_probe()
592 uart_add_one_port(&altera_uart_driver, port); in altera_uart_probe()
599 struct uart_port *port = platform_get_drvdata(pdev); in altera_uart_remove() local
601 if (port) { in altera_uart_remove()
602 uart_remove_one_port(&altera_uart_driver, port); in altera_uart_remove()
603 port->mapbase = 0; in altera_uart_remove()
604 iounmap(port->membase); in altera_uart_remove()
610 { .compatible = "ALTR,uart-1.0", },
611 { .compatible = "altr,uart-1.0", },