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()
136 offset <<= up->port.regshift; in serial_out()
138 switch (up->port.iotype) { in serial_out()
140 outb(up->port.hub6 - 1 + offset, up->port.iobase); in serial_out()
141 outb(value, up->port.iobase + 1); in serial_out()
145 writeb(value, up->port.membase + offset); in serial_out()
149 outb(value, up->port.iobase + offset); in serial_out()
165 * We set the port uart clock rate if we succeed.
182 up->port.uartclk = SERIAL_RSA_BAUD_BASE * 16; in __enable_rsa()
189 if (up->port.type == PORT_RSA) { in enable_rsa()
190 if (up->port.uartclk != SERIAL_RSA_BAUD_BASE * 16) { in enable_rsa()
191 uart_port_lock_irq(&up->port); in enable_rsa()
193 uart_port_unlock_irq(&up->port); in enable_rsa()
195 if (up->port.uartclk == SERIAL_RSA_BAUD_BASE * 16) in enable_rsa()
211 if (up->port.type == PORT_RSA && in disable_rsa()
212 up->port.uartclk == SERIAL_RSA_BAUD_BASE * 16) { in disable_rsa()
213 uart_port_lock_irq(&up->port); in disable_rsa()
225 up->port.uartclk = SERIAL_RSA_BAUD_BASE_LO * 16; in disable_rsa()
226 uart_port_unlock_irq(&up->port); in disable_rsa()
233 if (p->ier & UART_IER_THRI) { in __stop_tx()
234 p->ier &= ~UART_IER_THRI; in __stop_tx()
235 serial_out(p, UART_IER, p->ier); in __stop_tx()
249 if (up->port.type == PORT_16C950) { in sunsu_stop_tx()
250 up->acr |= UART_ACR_TXDIS; in sunsu_stop_tx()
251 serial_icr_write(up, UART_ACR, up->acr); in sunsu_stop_tx()
260 if (!(up->ier & UART_IER_THRI)) { in sunsu_start_tx()
261 up->ier |= UART_IER_THRI; in sunsu_start_tx()
262 serial_out(up, UART_IER, up->ier); in sunsu_start_tx()
266 * Re-enable the transmitter if we disabled it. in sunsu_start_tx()
268 if (up->port.type == PORT_16C950 && up->acr & UART_ACR_TXDIS) { in sunsu_start_tx()
269 up->acr &= ~UART_ACR_TXDIS; in sunsu_start_tx()
270 serial_icr_write(up, UART_ACR, up->acr); in sunsu_start_tx()
279 up->ier &= ~UART_IER_RLSI; in sunsu_stop_rx()
280 up->port.read_status_mask &= ~UART_LSR_DR; in sunsu_stop_rx()
281 serial_out(up, UART_IER, up->ier); in sunsu_stop_rx()
290 uart_port_lock_irqsave(&up->port, &flags); in sunsu_enable_ms()
291 up->ier |= UART_IER_MSI; in sunsu_enable_ms()
292 serial_out(up, UART_IER, up->ier); in sunsu_enable_ms()
293 uart_port_unlock_irqrestore(&up->port, flags); in sunsu_enable_ms()
299 struct tty_port *port = &up->port.state->port; in receive_chars()
307 up->port.icount.rx++; in receive_chars()
316 up->port.icount.brk++; in receive_chars()
317 if (up->port.cons != NULL && in receive_chars()
318 up->port.line == up->port.cons->index) in receive_chars()
326 if (uart_handle_break(&up->port)) in receive_chars()
329 up->port.icount.parity++; in receive_chars()
331 up->port.icount.frame++; in receive_chars()
333 up->port.icount.overrun++; in receive_chars()
338 *status &= up->port.read_status_mask; in receive_chars()
340 if (up->port.cons != NULL && in receive_chars()
341 up->port.line == up->port.cons->index) { in receive_chars()
343 *status |= up->lsr_break_flag; in receive_chars()
344 up->lsr_break_flag = 0; in receive_chars()
354 if (uart_handle_sysrq_char(&up->port, ch)) in receive_chars()
356 if ((*status & up->port.ignore_status_mask) == 0) in receive_chars()
367 } while ((*status & UART_LSR_DR) && (max_count-- > 0)); in receive_chars()
375 struct tty_port *tport = &up->port.state->port; in transmit_chars()
379 if (up->port.x_char) { in transmit_chars()
380 serial_out(up, UART_TX, up->port.x_char); in transmit_chars()
381 up->port.icount.tx++; in transmit_chars()
382 up->port.x_char = 0; in transmit_chars()
385 if (uart_tx_stopped(&up->port)) { in transmit_chars()
386 sunsu_stop_tx(&up->port); in transmit_chars()
389 if (kfifo_is_empty(&tport->xmit_fifo)) { in transmit_chars()
394 count = up->port.fifosize; in transmit_chars()
396 if (!uart_fifo_get(&up->port, &ch)) in transmit_chars()
400 } while (--count > 0); in transmit_chars()
402 if (kfifo_len(&tport->xmit_fifo) < WAKEUP_CHARS) in transmit_chars()
403 uart_write_wakeup(&up->port); in transmit_chars()
405 if (kfifo_is_empty(&tport->xmit_fifo)) in transmit_chars()
419 up->port.icount.rng++; in check_modem_status()
421 up->port.icount.dsr++; in check_modem_status()
423 uart_handle_dcd_change(&up->port, status & UART_MSR_DCD); in check_modem_status()
425 uart_handle_cts_change(&up->port, status & UART_MSR_CTS); in check_modem_status()
427 wake_up_interruptible(&up->port.state->port.delta_msr_wait); in check_modem_status()
436 uart_port_lock_irqsave(&up->port, &flags); in sunsu_serial_interrupt()
446 tty_flip_buffer_push(&up->port.state->port); in sunsu_serial_interrupt()
450 uart_port_unlock_irqrestore(&up->port, flags); in sunsu_serial_interrupt()
463 unsigned int cur_cflag = up->cflag; in sunsu_change_mouse_baud()
466 up->cflag &= ~CBAUD; in sunsu_change_mouse_baud()
467 up->cflag |= suncore_mouse_baud_cflag_next(cur_cflag, &new_baud); in sunsu_change_mouse_baud()
469 quot = up->port.uartclk / (16 * new_baud); in sunsu_change_mouse_baud()
471 sunsu_change_speed(&up->port, up->cflag, 0, quot); in sunsu_change_mouse_baud()
479 /* Stop-A is handled by drivers/char/keyboard.c now. */ in receive_kbd_ms_chars()
480 if (up->su_type == SU_PORT_KBD) { in receive_kbd_ms_chars()
482 serio_interrupt(&up->serio, ch, 0); in receive_kbd_ms_chars()
484 } else if (up->su_type == SU_PORT_MS) { in receive_kbd_ms_chars()
496 serio_interrupt(&up->serio, ch, 0); in receive_kbd_ms_chars()
525 uart_port_lock_irqsave(&up->port, &flags); in sunsu_tx_empty()
527 uart_port_unlock_irqrestore(&up->port, flags); in sunsu_tx_empty()
579 uart_port_lock_irqsave(&up->port, &flags); in sunsu_break_ctl()
580 if (break_state == -1) in sunsu_break_ctl()
581 up->lcr |= UART_LCR_SBC; in sunsu_break_ctl()
583 up->lcr &= ~UART_LCR_SBC; in sunsu_break_ctl()
584 serial_out(up, UART_LCR, up->lcr); in sunsu_break_ctl()
585 uart_port_unlock_irqrestore(&up->port, flags); in sunsu_break_ctl()
595 if (up->port.type == PORT_16C950) { in sunsu_startup()
596 /* Wake up and initialize UART */ in sunsu_startup()
597 up->acr = 0; in sunsu_startup()
602 serial_icr_write(up, UART_CSR, 0); /* Reset the UART */ in sunsu_startup()
620 if (uart_config[up->port.type].flags & UART_CLEAR_FIFO) { in sunsu_startup()
637 * if it is, then bail out, because there's likely no UART in sunsu_startup()
640 if (!(up->port.flags & UPF_BUGGY_UART) && in sunsu_startup()
642 printk("ttyS%d: LSR safety check engaged!\n", up->port.line); in sunsu_startup()
643 return -ENODEV; in sunsu_startup()
646 if (up->su_type != SU_PORT_PORT) { in sunsu_startup()
647 retval = request_irq(up->port.irq, sunsu_kbd_ms_interrupt, in sunsu_startup()
648 IRQF_SHARED, su_typev[up->su_type], up); in sunsu_startup()
650 retval = request_irq(up->port.irq, sunsu_serial_interrupt, in sunsu_startup()
651 IRQF_SHARED, su_typev[up->su_type], up); in sunsu_startup()
654 printk("su: Cannot register IRQ %d\n", up->port.irq); in sunsu_startup()
659 * Now, initialize the UART in sunsu_startup()
663 uart_port_lock_irqsave(&up->port, &flags); in sunsu_startup()
665 up->port.mctrl |= TIOCM_OUT2; in sunsu_startup()
667 sunsu_set_mctrl(&up->port, up->port.mctrl); in sunsu_startup()
668 uart_port_unlock_irqrestore(&up->port, flags); in sunsu_startup()
675 up->ier = UART_IER_RLSI | UART_IER_RDI; in sunsu_startup()
676 serial_out(up, UART_IER, up->ier); in sunsu_startup()
678 if (up->port.flags & UPF_FOURPORT) { in sunsu_startup()
683 icp = (up->port.iobase & 0xfe0) | 0x01f; in sunsu_startup()
708 up->ier = 0; in sunsu_shutdown()
711 uart_port_lock_irqsave(&up->port, &flags); in sunsu_shutdown()
712 if (up->port.flags & UPF_FOURPORT) { in sunsu_shutdown()
714 inb((up->port.iobase & 0xfe0) | 0x1f); in sunsu_shutdown()
715 up->port.mctrl |= TIOCM_OUT1; in sunsu_shutdown()
717 up->port.mctrl &= ~TIOCM_OUT2; in sunsu_shutdown()
719 sunsu_set_mctrl(&up->port, up->port.mctrl); in sunsu_shutdown()
720 uart_port_unlock_irqrestore(&up->port, flags); in sunsu_shutdown()
743 free_irq(up->port.irq, up); in sunsu_shutdown()
785 if ((quot & 0xff) == 0 && up->port.type == PORT_16C950 && in sunsu_change_speed()
786 up->rev == 0x5201) in sunsu_change_speed()
789 if (uart_config[up->port.type].flags & UART_USE_FIFO) { in sunsu_change_speed()
790 if ((up->port.uartclk / quot) < (2400 * 16)) in sunsu_change_speed()
793 else if (up->port.type == PORT_RSA) in sunsu_change_speed()
799 if (up->port.type == PORT_16750) in sunsu_change_speed()
806 uart_port_lock_irqsave(&up->port, &flags); in sunsu_change_speed()
809 * Update the per-port timeout. in sunsu_change_speed()
811 uart_update_timeout(port, cflag, (port->uartclk / (16 * quot))); in sunsu_change_speed()
813 up->port.read_status_mask = UART_LSR_OE | UART_LSR_THRE | UART_LSR_DR; in sunsu_change_speed()
815 up->port.read_status_mask |= UART_LSR_FE | UART_LSR_PE; in sunsu_change_speed()
817 up->port.read_status_mask |= UART_LSR_BI; in sunsu_change_speed()
822 up->port.ignore_status_mask = 0; in sunsu_change_speed()
824 up->port.ignore_status_mask |= UART_LSR_PE | UART_LSR_FE; in sunsu_change_speed()
826 up->port.ignore_status_mask |= UART_LSR_BI; in sunsu_change_speed()
832 up->port.ignore_status_mask |= UART_LSR_OE; in sunsu_change_speed()
839 up->port.ignore_status_mask |= UART_LSR_DR; in sunsu_change_speed()
844 up->ier &= ~UART_IER_MSI; in sunsu_change_speed()
845 if (UART_ENABLE_MS(&up->port, cflag)) in sunsu_change_speed()
846 up->ier |= UART_IER_MSI; in sunsu_change_speed()
848 serial_out(up, UART_IER, up->ier); in sunsu_change_speed()
850 if (uart_config[up->port.type].flags & UART_STARTECH) { in sunsu_change_speed()
857 if (up->port.type == PORT_16750) in sunsu_change_speed()
860 up->lcr = cval; /* Save LCR */ in sunsu_change_speed()
861 if (up->port.type != PORT_16750) { in sunsu_change_speed()
869 up->cflag = cflag; in sunsu_change_speed()
871 uart_port_unlock_irqrestore(&up->port, flags); in sunsu_change_speed()
883 baud = uart_get_baud_rate(port, termios, old, 0, port->uartclk/16); in sunsu_set_termios()
886 sunsu_change_speed(port, termios->c_cflag, termios->c_iflag, quot); in sunsu_set_termios()
906 * splitting all the OBP probing crap from the UART probing. in sunsu_config_port()
909 port->type = up->type_probed; /* XXX */ in sunsu_config_port()
916 return -EINVAL; in sunsu_verify_port()
922 int type = port->type; in sunsu_type()
959 struct uart_sunsu_port *up = serio->port_data; in sunsu_serio_write()
979 struct uart_sunsu_port *up = serio->port_data; in sunsu_serio_open()
984 if (!up->serio_open) { in sunsu_serio_open()
985 up->serio_open = 1; in sunsu_serio_open()
988 ret = -EBUSY; in sunsu_serio_open()
996 struct uart_sunsu_port *up = serio->port_data; in sunsu_serio_close()
1000 up->serio_open = 0; in sunsu_serio_close()
1012 if (up->su_type == SU_PORT_NONE) in sunsu_autoconfig()
1015 up->type_probed = PORT_UNKNOWN; in sunsu_autoconfig()
1016 up->port.iotype = UPIO_MEM; in sunsu_autoconfig()
1018 uart_port_lock_irqsave(&up->port, &flags); in sunsu_autoconfig()
1020 if (!(up->port.flags & UPF_BUGGY_UART)) { in sunsu_autoconfig()
1027 * 0x80 is a non-existent port; which should be safe since in sunsu_autoconfig()
1050 * Check to see if a UART is really there. Certain broken in sunsu_autoconfig()
1056 * that conflicts with COM 1-4 --- we hope! in sunsu_autoconfig()
1058 if (!(up->port.flags & UPF_SKIP_TEST)) { in sunsu_autoconfig()
1072 up->port.type = PORT_16450; in sunsu_autoconfig()
1075 up->port.type = PORT_UNKNOWN; in sunsu_autoconfig()
1078 up->port.type = PORT_16550; in sunsu_autoconfig()
1081 up->port.type = PORT_16550A; in sunsu_autoconfig()
1084 if (up->port.type == PORT_16550A) { in sunsu_autoconfig()
1085 /* Check for Startech UART's */ in sunsu_autoconfig()
1088 up->port.type = PORT_16650; in sunsu_autoconfig()
1092 up->port.type = PORT_16650V2; in sunsu_autoconfig()
1095 if (up->port.type == PORT_16550A) { in sunsu_autoconfig()
1103 * If this is a 16750, and not a cheap UART in sunsu_autoconfig()
1114 up->port.type = PORT_16750; in sunsu_autoconfig()
1119 if (up->port.type == PORT_16450) { in sunsu_autoconfig()
1128 up->port.type = PORT_8250; in sunsu_autoconfig()
1131 up->port.fifosize = uart_config[up->port.type].dfl_xmit_fifo_size; in sunsu_autoconfig()
1133 if (up->port.type == PORT_UNKNOWN) in sunsu_autoconfig()
1135 up->type_probed = up->port.type; /* XXX */ in sunsu_autoconfig()
1138 * Reset the UART. in sunsu_autoconfig()
1141 if (up->port.type == PORT_RSA) in sunsu_autoconfig()
1153 uart_port_unlock_irqrestore(&up->port, flags); in sunsu_autoconfig()
1170 if (up->su_type == SU_PORT_KBD) { in sunsu_kbd_ms_init()
1171 up->cflag = B1200 | CS8 | CLOCAL | CREAD; in sunsu_kbd_ms_init()
1174 up->cflag = B4800 | CS8 | CLOCAL | CREAD; in sunsu_kbd_ms_init()
1177 quot = up->port.uartclk / (16 * baud); in sunsu_kbd_ms_init()
1180 if (up->port.type == PORT_UNKNOWN) in sunsu_kbd_ms_init()
1181 return -ENODEV; in sunsu_kbd_ms_init()
1184 up->port.dev->of_node, in sunsu_kbd_ms_init()
1185 (up->su_type == SU_PORT_KBD) ? "Keyboard" : "Mouse", in sunsu_kbd_ms_init()
1186 (unsigned long long) up->port.mapbase, in sunsu_kbd_ms_init()
1187 up->port.irq); in sunsu_kbd_ms_init()
1190 serio = &up->serio; in sunsu_kbd_ms_init()
1191 serio->port_data = up; in sunsu_kbd_ms_init()
1193 serio->id.type = SERIO_RS232; in sunsu_kbd_ms_init()
1194 if (up->su_type == SU_PORT_KBD) { in sunsu_kbd_ms_init()
1195 serio->id.proto = SERIO_SUNKBD; in sunsu_kbd_ms_init()
1196 strscpy(serio->name, "sukbd", sizeof(serio->name)); in sunsu_kbd_ms_init()
1198 serio->id.proto = SERIO_SUN; in sunsu_kbd_ms_init()
1199 serio->id.extra = 1; in sunsu_kbd_ms_init()
1200 strscpy(serio->name, "sums", sizeof(serio->name)); in sunsu_kbd_ms_init()
1202 strscpy(serio->phys, in sunsu_kbd_ms_init()
1203 (!(up->port.line & 1) ? "su/serio0" : "su/serio1"), in sunsu_kbd_ms_init()
1204 sizeof(serio->phys)); in sunsu_kbd_ms_init()
1206 serio->write = sunsu_serio_write; in sunsu_kbd_ms_init()
1207 serio->open = sunsu_serio_open; in sunsu_kbd_ms_init()
1208 serio->close = sunsu_serio_close; in sunsu_kbd_ms_init()
1209 serio->dev.parent = up->port.dev; in sunsu_kbd_ms_init()
1214 sunsu_change_speed(&up->port, up->cflag, 0, quot); in sunsu_kbd_ms_init()
1216 sunsu_startup(&up->port); in sunsu_kbd_ms_init()
1221 * ------------------------------------------------------------
1223 * ------------------------------------------------------------
1240 up->lsr_break_flag = UART_LSR_BI; in wait_for_xmitr()
1242 if (--tmout == 0) in wait_for_xmitr()
1248 if (up->port.flags & UPF_CONS_FLOW) { in wait_for_xmitr()
1250 while (--tmout && in wait_for_xmitr()
1272 struct uart_sunsu_port *up = &sunsu_ports[co->index]; in sunsu_console_write()
1277 if (up->port.sysrq || oops_in_progress) in sunsu_console_write()
1278 locked = uart_port_trylock_irqsave(&up->port, &flags); in sunsu_console_write()
1280 uart_port_lock_irqsave(&up->port, &flags); in sunsu_console_write()
1288 uart_console_write(&up->port, s, count, sunsu_console_putchar); in sunsu_console_write()
1298 uart_port_unlock_irqrestore(&up->port, flags); in sunsu_console_write()
1303 * - construct a cflag setting for the first su_open()
1304 * - initialize the serial port
1305 * Return non-zero if we didn't find a serial port.
1314 (sunsu_reg.minor - 64) + co->index); in sunsu_console_setup()
1316 if (co->index > nr_inst) in sunsu_console_setup()
1317 return -ENODEV; in sunsu_console_setup()
1318 port = &sunsu_ports[co->index].port; in sunsu_console_setup()
1323 spin_lock_init(&port->lock); in sunsu_console_setup()
1326 sunserial_console_termios(co, port->dev->of_node); in sunsu_console_setup()
1329 termios.c_cflag = co->cflag; in sunsu_console_setup()
1330 port->mctrl |= TIOCM_DTR; in sunsu_console_setup()
1331 port->ops->set_termios(port, &termios, &dummy); in sunsu_console_setup()
1342 .index = -1,
1388 struct device_node *dp = op->dev.of_node; in su_probe()
1398 return -EINVAL; in su_probe()
1403 return -ENOMEM; in su_probe()
1406 up->port.line = nr_inst; in su_probe()
1408 spin_lock_init(&up->port.lock); in su_probe()
1410 up->su_type = type; in su_probe()
1412 rp = &op->resource[0]; in su_probe()
1413 up->port.mapbase = rp->start; in su_probe()
1414 up->reg_size = resource_size(rp); in su_probe()
1415 up->port.membase = of_ioremap(rp, 0, up->reg_size, "su"); in su_probe()
1416 if (!up->port.membase) { in su_probe()
1419 return -ENOMEM; in su_probe()
1422 up->port.irq = op->archdata.irqs[0]; in su_probe()
1424 up->port.dev = &op->dev; in su_probe()
1426 up->port.type = PORT_UNKNOWN; in su_probe()
1427 up->port.uartclk = (SU_BASE_BAUD * 16); in su_probe()
1428 up->port.has_sysrq = IS_ENABLED(CONFIG_SERIAL_SUNSU_CONSOLE); in su_probe()
1431 if (up->su_type == SU_PORT_KBD || up->su_type == SU_PORT_MS) { in su_probe()
1434 of_iounmap(&op->resource[0], in su_probe()
1435 up->port.membase, up->reg_size); in su_probe()
1446 up->port.flags |= UPF_BOOT_AUTOCONF; in su_probe()
1450 err = -ENODEV; in su_probe()
1451 if (up->port.type == PORT_UNKNOWN) in su_probe()
1454 up->port.ops = &sunsu_pops; in su_probe()
1457 if (of_node_name_eq(dp, "rsc-console") || in su_probe()
1458 of_node_name_eq(dp, "lom-console")) in su_probe()
1462 &sunsu_reg, up->port.line, in su_probe()
1464 err = uart_add_one_port(&sunsu_reg, &up->port); in su_probe()
1475 of_iounmap(&op->resource[0], up->port.membase, up->reg_size); in su_probe()
1485 if (up->su_type == SU_PORT_MS || in su_remove()
1486 up->su_type == SU_PORT_KBD) in su_remove()
1491 serio_unregister_port(&up->serio); in su_remove()
1493 } else if (up->port.type != PORT_UNKNOWN) in su_remove()
1494 uart_remove_one_port(&sunsu_reg, &up->port); in su_remove()
1496 if (up->port.membase) in su_remove()
1497 of_iounmap(&op->resource[0], up->port.membase, up->reg_size); in su_remove()
1512 .compatible = "su",
1516 .compatible = "su",