Lines Matching +full:uart +full:- +full:16550 +full:- +full:compatible
1 // SPDX-License-Identifier: GPL-2.0
6 * Copyright (C) 1998-1999 Pete Zaitcev (zaitcev@yahoo.com)
13 * Theodore Ts'o <tytso@mit.edu>, 2001-Oct-12
15 * Converted to new 2.5.x UART layer.
16 * David S. Miller (davem@davemloft.net), 2002-Jul-29
51 * in a UART clock of 1.8462 MHz.
65 * Here we define the default xmit fifo size used for each type of UART.
71 { "16550", 1, 0 },
72 { "16550A", 16, UART_CLEAR_FIFO | UART_USE_FIFO },
106 offset <<= up->port.regshift; in serial_in()
108 switch (up->port.iotype) { in serial_in()
110 outb(up->port.hub6 - 1 + offset, up->port.iobase); in serial_in()
111 return inb(up->port.iobase + 1); in serial_in()
114 return readb(up->port.membase + offset); in serial_in()
117 return inb(up->port.iobase + offset); in serial_in()
135 offset <<= up->port.regshift; in serial_out()
137 switch (up->port.iotype) { in serial_out()
139 outb(up->port.hub6 - 1 + offset, up->port.iobase); in serial_out()
140 outb(value, up->port.iobase + 1); in serial_out()
144 writeb(value, up->port.membase + offset); in serial_out()
148 outb(value, up->port.iobase + offset); in serial_out()
176 serial_icr_write(up, UART_ACR, up->acr | UART_ACR_ICRRD);
179 serial_icr_write(up, UART_ACR, up->acr);
188 * We set the port uart clock rate if we succeed.
205 up->port.uartclk = SERIAL_RSA_BAUD_BASE * 16; in __enable_rsa()
212 if (up->port.type == PORT_RSA) { in enable_rsa()
213 if (up->port.uartclk != SERIAL_RSA_BAUD_BASE * 16) { in enable_rsa()
214 spin_lock_irq(&up->port.lock); in enable_rsa()
216 spin_unlock_irq(&up->port.lock); in enable_rsa()
218 if (up->port.uartclk == SERIAL_RSA_BAUD_BASE * 16) in enable_rsa()
234 if (up->port.type == PORT_RSA && in disable_rsa()
235 up->port.uartclk == SERIAL_RSA_BAUD_BASE * 16) { in disable_rsa()
236 spin_lock_irq(&up->port.lock); in disable_rsa()
248 up->port.uartclk = SERIAL_RSA_BAUD_BASE_LO * 16; in disable_rsa()
249 spin_unlock_irq(&up->port.lock); in disable_rsa()
256 if (p->ier & UART_IER_THRI) { in __stop_tx()
257 p->ier &= ~UART_IER_THRI; in __stop_tx()
258 serial_out(p, UART_IER, p->ier); in __stop_tx()
272 if (up->port.type == PORT_16C950) { in sunsu_stop_tx()
273 up->acr |= UART_ACR_TXDIS; in sunsu_stop_tx()
274 serial_icr_write(up, UART_ACR, up->acr); in sunsu_stop_tx()
283 if (!(up->ier & UART_IER_THRI)) { in sunsu_start_tx()
284 up->ier |= UART_IER_THRI; in sunsu_start_tx()
285 serial_out(up, UART_IER, up->ier); in sunsu_start_tx()
289 * Re-enable the transmitter if we disabled it. in sunsu_start_tx()
291 if (up->port.type == PORT_16C950 && up->acr & UART_ACR_TXDIS) { in sunsu_start_tx()
292 up->acr &= ~UART_ACR_TXDIS; in sunsu_start_tx()
293 serial_icr_write(up, UART_ACR, up->acr); in sunsu_start_tx()
302 up->ier &= ~UART_IER_RLSI; in sunsu_stop_rx()
303 up->port.read_status_mask &= ~UART_LSR_DR; in sunsu_stop_rx()
304 serial_out(up, UART_IER, up->ier); in sunsu_stop_rx()
313 spin_lock_irqsave(&up->port.lock, flags); in sunsu_enable_ms()
314 up->ier |= UART_IER_MSI; in sunsu_enable_ms()
315 serial_out(up, UART_IER, up->ier); in sunsu_enable_ms()
316 spin_unlock_irqrestore(&up->port.lock, flags); in sunsu_enable_ms()
322 struct tty_port *port = &up->port.state->port; in receive_chars()
330 up->port.icount.rx++; in receive_chars()
339 up->port.icount.brk++; in receive_chars()
340 if (up->port.cons != NULL && in receive_chars()
341 up->port.line == up->port.cons->index) in receive_chars()
349 if (uart_handle_break(&up->port)) in receive_chars()
352 up->port.icount.parity++; in receive_chars()
354 up->port.icount.frame++; in receive_chars()
356 up->port.icount.overrun++; in receive_chars()
361 *status &= up->port.read_status_mask; in receive_chars()
363 if (up->port.cons != NULL && in receive_chars()
364 up->port.line == up->port.cons->index) { in receive_chars()
366 *status |= up->lsr_break_flag; in receive_chars()
367 up->lsr_break_flag = 0; in receive_chars()
377 if (uart_handle_sysrq_char(&up->port, ch)) in receive_chars()
379 if ((*status & up->port.ignore_status_mask) == 0) in receive_chars()
390 } while ((*status & UART_LSR_DR) && (max_count-- > 0)); in receive_chars()
398 struct circ_buf *xmit = &up->port.state->xmit; in transmit_chars()
401 if (up->port.x_char) { in transmit_chars()
402 serial_outp(up, UART_TX, up->port.x_char); in transmit_chars()
403 up->port.icount.tx++; in transmit_chars()
404 up->port.x_char = 0; in transmit_chars()
407 if (uart_tx_stopped(&up->port)) { in transmit_chars()
408 sunsu_stop_tx(&up->port); in transmit_chars()
416 count = up->port.fifosize; in transmit_chars()
418 serial_out(up, UART_TX, xmit->buf[xmit->tail]); in transmit_chars()
419 xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1); in transmit_chars()
420 up->port.icount.tx++; in transmit_chars()
423 } while (--count > 0); in transmit_chars()
426 uart_write_wakeup(&up->port); in transmit_chars()
442 up->port.icount.rng++; in check_modem_status()
444 up->port.icount.dsr++; in check_modem_status()
446 uart_handle_dcd_change(&up->port, status & UART_MSR_DCD); in check_modem_status()
448 uart_handle_cts_change(&up->port, status & UART_MSR_CTS); in check_modem_status()
450 wake_up_interruptible(&up->port.state->port.delta_msr_wait); in check_modem_status()
459 spin_lock_irqsave(&up->port.lock, flags); in sunsu_serial_interrupt()
469 tty_flip_buffer_push(&up->port.state->port); in sunsu_serial_interrupt()
473 spin_unlock_irqrestore(&up->port.lock, flags); in sunsu_serial_interrupt()
486 unsigned int cur_cflag = up->cflag; in sunsu_change_mouse_baud()
489 up->cflag &= ~CBAUD; in sunsu_change_mouse_baud()
490 up->cflag |= suncore_mouse_baud_cflag_next(cur_cflag, &new_baud); in sunsu_change_mouse_baud()
492 quot = up->port.uartclk / (16 * new_baud); in sunsu_change_mouse_baud()
494 sunsu_change_speed(&up->port, up->cflag, 0, quot); in sunsu_change_mouse_baud()
502 /* Stop-A is handled by drivers/char/keyboard.c now. */ in receive_kbd_ms_chars()
503 if (up->su_type == SU_PORT_KBD) { in receive_kbd_ms_chars()
505 serio_interrupt(&up->serio, ch, 0); in receive_kbd_ms_chars()
507 } else if (up->su_type == SU_PORT_MS) { in receive_kbd_ms_chars()
519 serio_interrupt(&up->serio, ch, 0); in receive_kbd_ms_chars()
548 spin_lock_irqsave(&up->port.lock, flags); in sunsu_tx_empty()
550 spin_unlock_irqrestore(&up->port.lock, flags); in sunsu_tx_empty()
602 spin_lock_irqsave(&up->port.lock, flags); in sunsu_break_ctl()
603 if (break_state == -1) in sunsu_break_ctl()
604 up->lcr |= UART_LCR_SBC; in sunsu_break_ctl()
606 up->lcr &= ~UART_LCR_SBC; in sunsu_break_ctl()
607 serial_out(up, UART_LCR, up->lcr); in sunsu_break_ctl()
608 spin_unlock_irqrestore(&up->port.lock, flags); in sunsu_break_ctl()
618 if (up->port.type == PORT_16C950) { in sunsu_startup()
619 /* Wake up and initialize UART */ in sunsu_startup()
620 up->acr = 0; in sunsu_startup()
625 serial_icr_write(up, UART_CSR, 0); /* Reset the UART */ in sunsu_startup()
643 if (uart_config[up->port.type].flags & UART_CLEAR_FIFO) { in sunsu_startup()
660 * if it is, then bail out, because there's likely no UART in sunsu_startup()
663 if (!(up->port.flags & UPF_BUGGY_UART) && in sunsu_startup()
665 printk("ttyS%d: LSR safety check engaged!\n", up->port.line); in sunsu_startup()
666 return -ENODEV; in sunsu_startup()
669 if (up->su_type != SU_PORT_PORT) { in sunsu_startup()
670 retval = request_irq(up->port.irq, sunsu_kbd_ms_interrupt, in sunsu_startup()
671 IRQF_SHARED, su_typev[up->su_type], up); in sunsu_startup()
673 retval = request_irq(up->port.irq, sunsu_serial_interrupt, in sunsu_startup()
674 IRQF_SHARED, su_typev[up->su_type], up); in sunsu_startup()
677 printk("su: Cannot register IRQ %d\n", up->port.irq); in sunsu_startup()
682 * Now, initialize the UART in sunsu_startup()
686 spin_lock_irqsave(&up->port.lock, flags); in sunsu_startup()
688 up->port.mctrl |= TIOCM_OUT2; in sunsu_startup()
690 sunsu_set_mctrl(&up->port, up->port.mctrl); in sunsu_startup()
691 spin_unlock_irqrestore(&up->port.lock, flags); in sunsu_startup()
698 up->ier = UART_IER_RLSI | UART_IER_RDI; in sunsu_startup()
699 serial_outp(up, UART_IER, up->ier); in sunsu_startup()
701 if (up->port.flags & UPF_FOURPORT) { in sunsu_startup()
706 icp = (up->port.iobase & 0xfe0) | 0x01f; in sunsu_startup()
731 up->ier = 0; in sunsu_shutdown()
734 spin_lock_irqsave(&up->port.lock, flags); in sunsu_shutdown()
735 if (up->port.flags & UPF_FOURPORT) { in sunsu_shutdown()
737 inb((up->port.iobase & 0xfe0) | 0x1f); in sunsu_shutdown()
738 up->port.mctrl |= TIOCM_OUT1; in sunsu_shutdown()
740 up->port.mctrl &= ~TIOCM_OUT2; in sunsu_shutdown()
742 sunsu_set_mctrl(&up->port, up->port.mctrl); in sunsu_shutdown()
743 spin_unlock_irqrestore(&up->port.lock, flags); in sunsu_shutdown()
766 free_irq(up->port.irq, up); in sunsu_shutdown()
810 if ((quot & 0xff) == 0 && up->port.type == PORT_16C950 && in sunsu_change_speed()
811 up->rev == 0x5201) in sunsu_change_speed()
814 if (uart_config[up->port.type].flags & UART_USE_FIFO) { in sunsu_change_speed()
815 if ((up->port.uartclk / quot) < (2400 * 16)) in sunsu_change_speed()
818 else if (up->port.type == PORT_RSA) in sunsu_change_speed()
824 if (up->port.type == PORT_16750) in sunsu_change_speed()
831 spin_lock_irqsave(&up->port.lock, flags); in sunsu_change_speed()
834 * Update the per-port timeout. in sunsu_change_speed()
836 uart_update_timeout(port, cflag, (port->uartclk / (16 * quot))); in sunsu_change_speed()
838 up->port.read_status_mask = UART_LSR_OE | UART_LSR_THRE | UART_LSR_DR; in sunsu_change_speed()
840 up->port.read_status_mask |= UART_LSR_FE | UART_LSR_PE; in sunsu_change_speed()
842 up->port.read_status_mask |= UART_LSR_BI; in sunsu_change_speed()
847 up->port.ignore_status_mask = 0; in sunsu_change_speed()
849 up->port.ignore_status_mask |= UART_LSR_PE | UART_LSR_FE; in sunsu_change_speed()
851 up->port.ignore_status_mask |= UART_LSR_BI; in sunsu_change_speed()
857 up->port.ignore_status_mask |= UART_LSR_OE; in sunsu_change_speed()
864 up->port.ignore_status_mask |= UART_LSR_DR; in sunsu_change_speed()
869 up->ier &= ~UART_IER_MSI; in sunsu_change_speed()
870 if (UART_ENABLE_MS(&up->port, cflag)) in sunsu_change_speed()
871 up->ier |= UART_IER_MSI; in sunsu_change_speed()
873 serial_out(up, UART_IER, up->ier); in sunsu_change_speed()
875 if (uart_config[up->port.type].flags & UART_STARTECH) { in sunsu_change_speed()
882 if (up->port.type == PORT_16750) in sunsu_change_speed()
885 up->lcr = cval; /* Save LCR */ in sunsu_change_speed()
886 if (up->port.type != PORT_16750) { in sunsu_change_speed()
894 up->cflag = cflag; in sunsu_change_speed()
896 spin_unlock_irqrestore(&up->port.lock, flags); in sunsu_change_speed()
908 baud = uart_get_baud_rate(port, termios, old, 0, port->uartclk/16); in sunsu_set_termios()
911 sunsu_change_speed(port, termios->c_cflag, termios->c_iflag, quot); in sunsu_set_termios()
931 * splitting all the OBP probing crap from the UART probing. in sunsu_config_port()
934 port->type = up->type_probed; /* XXX */ in sunsu_config_port()
941 return -EINVAL; in sunsu_verify_port()
947 int type = port->type; in sunsu_type()
984 struct uart_sunsu_port *up = serio->port_data; in sunsu_serio_write()
1004 struct uart_sunsu_port *up = serio->port_data; in sunsu_serio_open()
1009 if (!up->serio_open) { in sunsu_serio_open()
1010 up->serio_open = 1; in sunsu_serio_open()
1013 ret = -EBUSY; in sunsu_serio_open()
1021 struct uart_sunsu_port *up = serio->port_data; in sunsu_serio_close()
1025 up->serio_open = 0; in sunsu_serio_close()
1037 if (up->su_type == SU_PORT_NONE) in sunsu_autoconfig()
1040 up->type_probed = PORT_UNKNOWN; in sunsu_autoconfig()
1041 up->port.iotype = UPIO_MEM; in sunsu_autoconfig()
1043 spin_lock_irqsave(&up->port.lock, flags); in sunsu_autoconfig()
1045 if (!(up->port.flags & UPF_BUGGY_UART)) { in sunsu_autoconfig()
1052 * 0x80 is a non-existent port; which should be safe since in sunsu_autoconfig()
1075 * Check to see if a UART is really there. Certain broken in sunsu_autoconfig()
1081 * that conflicts with COM 1-4 --- we hope! in sunsu_autoconfig()
1083 if (!(up->port.flags & UPF_SKIP_TEST)) { in sunsu_autoconfig()
1097 up->port.type = PORT_16450; in sunsu_autoconfig()
1100 up->port.type = PORT_UNKNOWN; in sunsu_autoconfig()
1103 up->port.type = PORT_16550; in sunsu_autoconfig()
1106 up->port.type = PORT_16550A; in sunsu_autoconfig()
1109 if (up->port.type == PORT_16550A) { in sunsu_autoconfig()
1110 /* Check for Startech UART's */ in sunsu_autoconfig()
1113 up->port.type = PORT_16650; in sunsu_autoconfig()
1117 up->port.type = PORT_16650V2; in sunsu_autoconfig()
1120 if (up->port.type == PORT_16550A) { in sunsu_autoconfig()
1128 * If this is a 16750, and not a cheap UART in sunsu_autoconfig()
1139 up->port.type = PORT_16750; in sunsu_autoconfig()
1144 if (up->port.type == PORT_16450) { in sunsu_autoconfig()
1153 up->port.type = PORT_8250; in sunsu_autoconfig()
1156 up->port.fifosize = uart_config[up->port.type].dfl_xmit_fifo_size; in sunsu_autoconfig()
1158 if (up->port.type == PORT_UNKNOWN) in sunsu_autoconfig()
1160 up->type_probed = up->port.type; /* XXX */ in sunsu_autoconfig()
1163 * Reset the UART. in sunsu_autoconfig()
1166 if (up->port.type == PORT_RSA) in sunsu_autoconfig()
1178 spin_unlock_irqrestore(&up->port.lock, flags); in sunsu_autoconfig()
1195 if (up->su_type == SU_PORT_KBD) { in sunsu_kbd_ms_init()
1196 up->cflag = B1200 | CS8 | CLOCAL | CREAD; in sunsu_kbd_ms_init()
1199 up->cflag = B4800 | CS8 | CLOCAL | CREAD; in sunsu_kbd_ms_init()
1202 quot = up->port.uartclk / (16 * baud); in sunsu_kbd_ms_init()
1205 if (up->port.type == PORT_UNKNOWN) in sunsu_kbd_ms_init()
1206 return -ENODEV; in sunsu_kbd_ms_init()
1209 up->port.dev->of_node, in sunsu_kbd_ms_init()
1210 (up->su_type == SU_PORT_KBD) ? "Keyboard" : "Mouse", in sunsu_kbd_ms_init()
1211 (unsigned long long) up->port.mapbase, in sunsu_kbd_ms_init()
1212 up->port.irq); in sunsu_kbd_ms_init()
1215 serio = &up->serio; in sunsu_kbd_ms_init()
1216 serio->port_data = up; in sunsu_kbd_ms_init()
1218 serio->id.type = SERIO_RS232; in sunsu_kbd_ms_init()
1219 if (up->su_type == SU_PORT_KBD) { in sunsu_kbd_ms_init()
1220 serio->id.proto = SERIO_SUNKBD; in sunsu_kbd_ms_init()
1221 strlcpy(serio->name, "sukbd", sizeof(serio->name)); in sunsu_kbd_ms_init()
1223 serio->id.proto = SERIO_SUN; in sunsu_kbd_ms_init()
1224 serio->id.extra = 1; in sunsu_kbd_ms_init()
1225 strlcpy(serio->name, "sums", sizeof(serio->name)); in sunsu_kbd_ms_init()
1227 strlcpy(serio->phys, in sunsu_kbd_ms_init()
1228 (!(up->port.line & 1) ? "su/serio0" : "su/serio1"), in sunsu_kbd_ms_init()
1229 sizeof(serio->phys)); in sunsu_kbd_ms_init()
1231 serio->write = sunsu_serio_write; in sunsu_kbd_ms_init()
1232 serio->open = sunsu_serio_open; in sunsu_kbd_ms_init()
1233 serio->close = sunsu_serio_close; in sunsu_kbd_ms_init()
1234 serio->dev.parent = up->port.dev; in sunsu_kbd_ms_init()
1239 sunsu_change_speed(&up->port, up->cflag, 0, quot); in sunsu_kbd_ms_init()
1241 sunsu_startup(&up->port); in sunsu_kbd_ms_init()
1246 * ------------------------------------------------------------
1248 * ------------------------------------------------------------
1267 up->lsr_break_flag = UART_LSR_BI; in wait_for_xmitr()
1269 if (--tmout == 0) in wait_for_xmitr()
1275 if (up->port.flags & UPF_CONS_FLOW) { in wait_for_xmitr()
1277 while (--tmout && in wait_for_xmitr()
1299 struct uart_sunsu_port *up = &sunsu_ports[co->index]; in sunsu_console_write()
1304 if (up->port.sysrq || oops_in_progress) in sunsu_console_write()
1305 locked = spin_trylock_irqsave(&up->port.lock, flags); in sunsu_console_write()
1307 spin_lock_irqsave(&up->port.lock, flags); in sunsu_console_write()
1315 uart_console_write(&up->port, s, count, sunsu_console_putchar); in sunsu_console_write()
1325 spin_unlock_irqrestore(&up->port.lock, flags); in sunsu_console_write()
1330 * - construct a cflag setting for the first su_open()
1331 * - initialize the serial port
1332 * Return non-zero if we didn't find a serial port.
1341 (sunsu_reg.minor - 64) + co->index); in sunsu_console_setup()
1343 if (co->index > nr_inst) in sunsu_console_setup()
1344 return -ENODEV; in sunsu_console_setup()
1345 port = &sunsu_ports[co->index].port; in sunsu_console_setup()
1350 spin_lock_init(&port->lock); in sunsu_console_setup()
1353 sunserial_console_termios(co, port->dev->of_node); in sunsu_console_setup()
1356 termios.c_cflag = co->cflag; in sunsu_console_setup()
1357 port->mctrl |= TIOCM_DTR; in sunsu_console_setup()
1358 port->ops->set_termios(port, &termios, &dummy); in sunsu_console_setup()
1369 .index = -1,
1430 struct device_node *dp = op->dev.of_node; in su_probe()
1440 return -EINVAL; in su_probe()
1445 return -ENOMEM; in su_probe()
1448 up->port.line = nr_inst; in su_probe()
1450 spin_lock_init(&up->port.lock); in su_probe()
1452 up->su_type = type; in su_probe()
1454 rp = &op->resource[0]; in su_probe()
1455 up->port.mapbase = rp->start; in su_probe()
1456 up->reg_size = resource_size(rp); in su_probe()
1457 up->port.membase = of_ioremap(rp, 0, up->reg_size, "su"); in su_probe()
1458 if (!up->port.membase) { in su_probe()
1461 return -ENOMEM; in su_probe()
1464 up->port.irq = op->archdata.irqs[0]; in su_probe()
1466 up->port.dev = &op->dev; in su_probe()
1468 up->port.type = PORT_UNKNOWN; in su_probe()
1469 up->port.uartclk = (SU_BASE_BAUD * 16); in su_probe()
1470 up->port.has_sysrq = IS_ENABLED(CONFIG_SERIAL_SUNSU_CONSOLE); in su_probe()
1473 if (up->su_type == SU_PORT_KBD || up->su_type == SU_PORT_MS) { in su_probe()
1476 of_iounmap(&op->resource[0], in su_probe()
1477 up->port.membase, up->reg_size); in su_probe()
1488 up->port.flags |= UPF_BOOT_AUTOCONF; in su_probe()
1492 err = -ENODEV; in su_probe()
1493 if (up->port.type == PORT_UNKNOWN) in su_probe()
1496 up->port.ops = &sunsu_pops; in su_probe()
1499 if (of_node_name_eq(dp, "rsc-console") || in su_probe()
1500 of_node_name_eq(dp, "lom-console")) in su_probe()
1504 &sunsu_reg, up->port.line, in su_probe()
1506 err = uart_add_one_port(&sunsu_reg, &up->port); in su_probe()
1517 of_iounmap(&op->resource[0], up->port.membase, up->reg_size); in su_probe()
1527 if (up->su_type == SU_PORT_MS || in su_remove()
1528 up->su_type == SU_PORT_KBD) in su_remove()
1533 serio_unregister_port(&up->serio); in su_remove()
1535 } else if (up->port.type != PORT_UNKNOWN) in su_remove()
1536 uart_remove_one_port(&sunsu_reg, &up->port); in su_remove()
1538 if (up->port.membase) in su_remove()
1539 of_iounmap(&op->resource[0], up->port.membase, up->reg_size); in su_remove()
1556 .compatible = "su",
1560 .compatible = "su",