sifive.c (2e21dee6a46a66e4c2ced778485e1044101edee4) sifive.c (32c694ec3efc2b7cdf921da50371297ba70e7d50)
1// SPDX-License-Identifier: GPL-2.0+
2/*
3 * SiFive UART driver
4 * Copyright (C) 2018 Paul Walmsley <paul@pwsan.com>
5 * Copyright (C) 2018-2019 SiFive
6 *
7 * Based partially on:
8 * - drivers/tty/serial/pxa.c

--- 398 unchanged lines hidden (view full) ---

407 u8 ch;
408
409 for (c = SIFIVE_RX_FIFO_DEPTH; c > 0; --c) {
410 ch = __ssp_receive_char(ssp, &is_empty);
411 if (is_empty)
412 break;
413
414 ssp->port.icount.rx++;
1// SPDX-License-Identifier: GPL-2.0+
2/*
3 * SiFive UART driver
4 * Copyright (C) 2018 Paul Walmsley <paul@pwsan.com>
5 * Copyright (C) 2018-2019 SiFive
6 *
7 * Based partially on:
8 * - drivers/tty/serial/pxa.c

--- 398 unchanged lines hidden (view full) ---

407 u8 ch;
408
409 for (c = SIFIVE_RX_FIFO_DEPTH; c > 0; --c) {
410 ch = __ssp_receive_char(ssp, &is_empty);
411 if (is_empty)
412 break;
413
414 ssp->port.icount.rx++;
415 uart_insert_char(&ssp->port, 0, 0, ch, TTY_NORMAL);
415 if (!uart_prepare_sysrq_char(&ssp->port, ch))
416 uart_insert_char(&ssp->port, 0, 0, ch, TTY_NORMAL);
416 }
417
418 tty_flip_buffer_push(&ssp->port.state->port);
419}
420
421/**
422 * __ssp_update_div() - calculate the divisor setting by the line rate
423 * @ssp: pointer to a struct sifive_serial_port

--- 105 unchanged lines hidden (view full) ---

529 return IRQ_NONE;
530 }
531
532 if (ip & SIFIVE_SERIAL_IP_RXWM_MASK)
533 __ssp_receive_chars(ssp);
534 if (ip & SIFIVE_SERIAL_IP_TXWM_MASK)
535 __ssp_transmit_chars(ssp);
536
417 }
418
419 tty_flip_buffer_push(&ssp->port.state->port);
420}
421
422/**
423 * __ssp_update_div() - calculate the divisor setting by the line rate
424 * @ssp: pointer to a struct sifive_serial_port

--- 105 unchanged lines hidden (view full) ---

530 return IRQ_NONE;
531 }
532
533 if (ip & SIFIVE_SERIAL_IP_RXWM_MASK)
534 __ssp_receive_chars(ssp);
535 if (ip & SIFIVE_SERIAL_IP_TXWM_MASK)
536 __ssp_transmit_chars(ssp);
537
537 uart_port_unlock(&ssp->port);
538 uart_unlock_and_check_sysrq(&ssp->port);
538
539 return IRQ_HANDLED;
540}
541
542static unsigned int sifive_serial_tx_empty(struct uart_port *port)
543{
544 return TIOCSER_TEMT;
545}

--- 240 unchanged lines hidden (view full) ---

786 struct sifive_serial_port *ssp = sifive_serial_console_ports[co->index];
787 unsigned long flags;
788 unsigned int ier;
789 int locked = 1;
790
791 if (!ssp)
792 return;
793
539
540 return IRQ_HANDLED;
541}
542
543static unsigned int sifive_serial_tx_empty(struct uart_port *port)
544{
545 return TIOCSER_TEMT;
546}

--- 240 unchanged lines hidden (view full) ---

787 struct sifive_serial_port *ssp = sifive_serial_console_ports[co->index];
788 unsigned long flags;
789 unsigned int ier;
790 int locked = 1;
791
792 if (!ssp)
793 return;
794
794 local_irq_save(flags);
795 if (ssp->port.sysrq)
796 locked = 0;
797 else if (oops_in_progress)
798 locked = uart_port_trylock(&ssp->port);
795 if (oops_in_progress)
796 locked = uart_port_trylock_irqsave(&ssp->port, &flags);
799 else
797 else
800 uart_port_lock(&ssp->port);
798 uart_port_lock_irqsave(&ssp->port, &flags);
801
802 ier = __ssp_readl(ssp, SIFIVE_SERIAL_IE_OFFS);
803 __ssp_writel(0, SIFIVE_SERIAL_IE_OFFS, ssp);
804
805 uart_console_write(&ssp->port, s, count, sifive_serial_console_putchar);
806
807 __ssp_writel(ier, SIFIVE_SERIAL_IE_OFFS, ssp);
808
809 if (locked)
799
800 ier = __ssp_readl(ssp, SIFIVE_SERIAL_IE_OFFS);
801 __ssp_writel(0, SIFIVE_SERIAL_IE_OFFS, ssp);
802
803 uart_console_write(&ssp->port, s, count, sifive_serial_console_putchar);
804
805 __ssp_writel(ier, SIFIVE_SERIAL_IE_OFFS, ssp);
806
807 if (locked)
810 uart_port_unlock(&ssp->port);
811 local_irq_restore(flags);
808 uart_port_unlock_irqrestore(&ssp->port, flags);
812}
813
814static int sifive_serial_console_setup(struct console *co, char *options)
815{
816 struct sifive_serial_port *ssp;
817 int baud = SIFIVE_DEFAULT_BAUD_RATE;
818 int bits = 8;
819 int parity = 'n';

--- 266 unchanged lines hidden --- 		809}
810
811static int sifive_serial_console_setup(struct console *co, char *options)
812{
813 struct sifive_serial_port *ssp;
814 int baud = SIFIVE_DEFAULT_BAUD_RATE;
815 int bits = 8;
816 int parity = 'n';

--- 266 unchanged lines hidden ---