diff options
Diffstat (limited to 'c/src/libchip/serial/ns16550-context.c')
| -rw-r--r-- | c/src/libchip/serial/ns16550-context.c | 814 |
1 files changed, 0 insertions, 814 deletions
diff --git a/c/src/libchip/serial/ns16550-context.c b/c/src/libchip/serial/ns16550-context.c deleted file mode 100644 index b42be96a26..0000000000 --- a/c/src/libchip/serial/ns16550-context.c +++ /dev/null @@ -1,814 +0,0 @@ -/** - * @file - * - * This file contains the TTY driver for the National Semiconductor NS16550. - * - * This part is widely cloned and second sourced. It is found in a number - * of "Super IO" controllers. - * - * This driver uses the termios pseudo driver. - */ - -/* - * COPYRIGHT (c) 1998 by Radstone Technology - * - * THIS FILE IS PROVIDED TO YOU, THE USER, "AS IS", WITHOUT WARRANTY OF ANY - * KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTY OF FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK - * AS TO THE QUALITY AND PERFORMANCE OF ALL CODE IN THIS FILE IS WITH YOU. - * - * You are hereby granted permission to use, copy, modify, and distribute - * this file, provided that this notice, plus the above copyright notice - * and disclaimer, appears in all copies. Radstone Technology will provide - * no support for this code. - * - * COPYRIGHT (c) 1989-2012. - * On-Line Applications Research Corporation (OAR). - * - * The license and distribution terms for this file may be - * found in the file LICENSE in this distribution or at - * http://www.rtems.org/license/LICENSE. - */ - -#include <stdlib.h> - -#include <rtems/bspIo.h> - -#include <bsp.h> - -#include <libchip/ns16550.h> -#include <libchip/ns16550_p.h> - -#if defined(BSP_FEATURE_IRQ_EXTENSION) - #include <bsp/irq.h> -#elif defined(BSP_FEATURE_IRQ_LEGACY) - #include <bsp/irq.h> -#elif defined(__PPC__) || defined(__i386__) - #include <bsp/irq.h> - #define BSP_FEATURE_IRQ_LEGACY - #ifdef BSP_SHARED_HANDLER_SUPPORT - #define BSP_FEATURE_IRQ_LEGACY_SHARED_HANDLER_SUPPORT - #endif -#endif - -static uint32_t NS16550_GetBaudDivisor(ns16550_context *ctx, uint32_t baud) -{ - uint32_t clock = ctx->clock; - uint32_t baudDivisor = (clock != 0 ? clock : 115200) / (baud * 16); - - if (ctx->has_fractional_divider_register) { - uint32_t fractionalDivider = 0x10; - uint32_t err = baud; - uint32_t mulVal; - uint32_t divAddVal; - - clock /= 16 * baudDivisor; - for (mulVal = 1; mulVal < 16; ++mulVal) { - for (divAddVal = 0; divAddVal < mulVal; ++divAddVal) { - uint32_t actual = (mulVal * clock) / (mulVal + divAddVal); - uint32_t newErr = actual > baud ? actual - baud : baud - actual; - - if (newErr < err) { - err = newErr; - fractionalDivider = (mulVal << 4) | divAddVal; - } - } - } - - (*ctx->set_reg)( - ctx->port, - NS16550_FRACTIONAL_DIVIDER, - fractionalDivider - ); - } - - return baudDivisor; -} - -/* - * ns16550_enable_interrupts - * - * This routine initializes the port to have the specified interrupts masked. - */ -static void ns16550_enable_interrupts( - ns16550_context *ctx, - int mask -) -{ - (*ctx->set_reg)(ctx->port, NS16550_INTERRUPT_ENABLE, mask); -} - -static void ns16550_clear_and_set_interrupts( - ns16550_context *ctx, - uint8_t clear, - uint8_t set -) -{ - rtems_interrupt_lock_context lock_context; - ns16550_get_reg get_reg = ctx->get_reg; - ns16550_set_reg set_reg = ctx->set_reg; - uintptr_t port = ctx->port; - uint8_t val; - - rtems_termios_device_lock_acquire(&ctx->base, &lock_context); - val = (*get_reg)(port, NS16550_INTERRUPT_ENABLE); - val &= ~clear; - val |= set; - (*set_reg)(port, NS16550_INTERRUPT_ENABLE, val); - rtems_termios_device_lock_release(&ctx->base, &lock_context); -} - -/* - * ns16550_probe - */ - -bool ns16550_probe(rtems_termios_device_context *base) -{ - ns16550_context *ctx = (ns16550_context *) base; - uintptr_t pNS16550; - uint8_t ucDataByte; - uint32_t ulBaudDivisor; - ns16550_set_reg setReg; - ns16550_get_reg getReg; - - ctx->modem_control = SP_MODEM_IRQ; - - pNS16550 = ctx->port; - setReg = ctx->set_reg; - getReg = ctx->get_reg; - - /* Clear the divisor latch, clear all interrupt enables, - * and reset and - * disable the FIFO's. - */ - - (*setReg)(pNS16550, NS16550_LINE_CONTROL, 0x0); - ns16550_enable_interrupts(ctx, NS16550_DISABLE_ALL_INTR ); - - /* Set the divisor latch and set the baud rate. */ - - ulBaudDivisor = NS16550_GetBaudDivisor(ctx, ctx->initial_baud); - ctx->baud_divisor = ulBaudDivisor; - ucDataByte = SP_LINE_DLAB; - (*setReg)(pNS16550, NS16550_LINE_CONTROL, ucDataByte); - - /* XXX */ - (*setReg)(pNS16550,NS16550_TRANSMIT_BUFFER,(uint8_t)(ulBaudDivisor & 0xffU)); - (*setReg)( - pNS16550,NS16550_INTERRUPT_ENABLE, - (uint8_t)(( ulBaudDivisor >> 8 ) & 0xffU ) - ); - - /* Clear the divisor latch and set the character size to eight bits */ - /* with one stop bit and no parity checking. */ - ucDataByte = EIGHT_BITS; - ctx->line_control = ucDataByte; - (*setReg)(pNS16550, NS16550_LINE_CONTROL, ucDataByte); - - /* Enable and reset transmit and receive FIFOs. TJA */ - ucDataByte = SP_FIFO_ENABLE; - (*setReg)(pNS16550, NS16550_FIFO_CONTROL, ucDataByte); - - ucDataByte = SP_FIFO_ENABLE | SP_FIFO_RXRST | SP_FIFO_TXRST; - (*setReg)(pNS16550, NS16550_FIFO_CONTROL, ucDataByte); - - ns16550_enable_interrupts(ctx, NS16550_DISABLE_ALL_INTR); - - /* Set data terminal ready. */ - /* And open interrupt tristate line */ - (*setReg)(pNS16550, NS16550_MODEM_CONTROL,ctx->modem_control); - - (*getReg)(pNS16550, NS16550_LINE_STATUS ); - (*getReg)(pNS16550, NS16550_RECEIVE_BUFFER ); - - return true; -} - -static size_t ns16550_write_to_fifo( - const ns16550_context *ctx, - const char *buf, - size_t len -) -{ - uintptr_t port = ctx->port; - ns16550_set_reg set = ctx->set_reg; - size_t out = len > SP_FIFO_SIZE ? SP_FIFO_SIZE : len; - size_t i; - - for (i = 0; i < out; ++i) { - (*set)(port, NS16550_TRANSMIT_BUFFER, buf[i]); - } - - return out; -} - -/** - * @brief Process interrupt. - */ -static void ns16550_isr(void *arg) -{ - rtems_termios_tty *tty = arg; - ns16550_context *ctx = rtems_termios_get_device_context(tty); - uintptr_t port = ctx->port; - ns16550_get_reg get = ctx->get_reg; - int i = 0; - char buf [SP_FIFO_SIZE]; - - /* Iterate until no more interrupts are pending */ - do { - /* Fetch received characters */ - for (i = 0; i < SP_FIFO_SIZE; ++i) { - if ((get( port, NS16550_LINE_STATUS) & SP_LSR_RDY) != 0) { - buf [i] = (char) get(port, NS16550_RECEIVE_BUFFER); - } else { - break; - } - } - - /* Enqueue fetched characters */ - rtems_termios_enqueue_raw_characters(tty, buf, i); - - /* Do transmit */ - if (ctx->out_total > 0 - && (get(port, NS16550_LINE_STATUS) & SP_LSR_THOLD) != 0) { - size_t current = ctx->out_current; - - ctx->out_buf += current; - ctx->out_remaining -= current; - - if (ctx->out_remaining > 0) { - ctx->out_current = - ns16550_write_to_fifo(ctx, ctx->out_buf, ctx->out_remaining); - } else { - rtems_termios_dequeue_characters(tty, ctx->out_total); - } - } - } while ((get( port, NS16550_INTERRUPT_ID) & SP_IID_0) == 0); -} - -static void ns16550_isr_task(void *arg) -{ - rtems_termios_tty *tty = arg; - ns16550_context *ctx = rtems_termios_get_device_context(tty); - uint8_t status = (*ctx->get_reg)(ctx->port, NS16550_LINE_STATUS); - - if ((status & SP_LSR_RDY) != 0) { - ns16550_clear_and_set_interrupts(ctx, SP_INT_RX_ENABLE, 0); - rtems_termios_rxirq_occured(tty); - } - - if (ctx->out_total > 0 && (status & SP_LSR_THOLD) != 0) { - size_t current = ctx->out_current; - - ctx->out_buf += current; - ctx->out_remaining -= current; - - if (ctx->out_remaining > 0) { - ctx->out_current = - ns16550_write_to_fifo(ctx, ctx->out_buf, ctx->out_remaining); - } else { - size_t done = ctx->out_total; - - ctx->out_total = 0; - ns16550_clear_and_set_interrupts(ctx, SP_INT_TX_ENABLE, 0); - rtems_termios_dequeue_characters(tty, done); - } - } -} - -static int ns16550_read_task(rtems_termios_device_context *base) -{ - ns16550_context *ctx = (ns16550_context *) base; - uintptr_t port = ctx->port; - ns16550_get_reg get = ctx->get_reg; - char buf[SP_FIFO_SIZE]; - int i; - - for (i = 0; i < SP_FIFO_SIZE; ++i) { - if ((get(port, NS16550_LINE_STATUS) & SP_LSR_RDY) != 0) { - buf[i] = (char) get(port, NS16550_RECEIVE_BUFFER); - } else { - break; - } - } - - rtems_termios_enqueue_raw_characters(ctx->tty, buf, i); - ns16550_clear_and_set_interrupts(ctx, 0, SP_INT_RX_ENABLE); - - return -1; -} - -/* - * ns16550_initialize_interrupts - * - * This routine initializes the port to operate in interrupt driver mode. - */ -static void ns16550_initialize_interrupts( - struct rtems_termios_tty *tty, - ns16550_context *ctx, - void (*isr)(void *) -) -{ - #ifdef BSP_FEATURE_IRQ_EXTENSION - { - rtems_status_code sc = RTEMS_SUCCESSFUL; - sc = rtems_interrupt_handler_install( - ctx->irq, - "NS16550", - RTEMS_INTERRUPT_SHARED, - isr, - tty - ); - if (sc != RTEMS_SUCCESSFUL) { - /* FIXME */ - printk( "%s: Error: Install interrupt handler\n", __func__); - rtems_fatal_error_occurred( 0xdeadbeef); - } - } - #elif defined(BSP_FEATURE_IRQ_LEGACY) - { - int rv = 0; - #ifdef BSP_FEATURE_IRQ_LEGACY_SHARED_HANDLER_SUPPORT - rtems_irq_connect_data cd = { - ctx->irq, - isr, - tty, - NULL, - NULL, - NULL, - NULL - }; - rv = BSP_install_rtems_shared_irq_handler( &cd); - #else - rtems_irq_connect_data cd = { - ctx->irq, - isr, - tty, - NULL, - NULL, - NULL - }; - rv = BSP_install_rtems_irq_handler( &cd); - #endif - if (rv == 0) { - /* FIXME */ - printk( "%s: Error: Install interrupt handler\n", __func__); - rtems_fatal_error_occurred( 0xdeadbeef); - } - } - #endif -} - -/* - * ns16550_open - */ - -static bool ns16550_open( - struct rtems_termios_tty *tty, - rtems_termios_device_context *base, - struct termios *term, - rtems_libio_open_close_args_t *args -) -{ - ns16550_context *ctx = (ns16550_context *) base; - - ctx->tty = tty; - - /* Set initial baud */ - rtems_termios_set_initial_baud(tty, ctx->initial_baud); - - if (tty->handler.mode == TERMIOS_IRQ_DRIVEN) { - ns16550_initialize_interrupts(tty, ctx, ns16550_isr); - ns16550_enable_interrupts(ctx, NS16550_ENABLE_ALL_INTR_EXCEPT_TX); - } else if (tty->handler.mode == TERMIOS_TASK_DRIVEN) { - ns16550_initialize_interrupts(tty, ctx, ns16550_isr_task); - ns16550_enable_interrupts(ctx, NS16550_ENABLE_ALL_INTR_EXCEPT_TX); - } - - return true; -} - -static void ns16550_cleanup_interrupts( - struct rtems_termios_tty *tty, - ns16550_context *ctx, - void (*isr)(void *) -) -{ - #if defined(BSP_FEATURE_IRQ_EXTENSION) - rtems_status_code sc = RTEMS_SUCCESSFUL; - sc = rtems_interrupt_handler_remove( - ctx->irq, - isr, - tty - ); - if (sc != RTEMS_SUCCESSFUL) { - /* FIXME */ - printk("%s: Error: Remove interrupt handler\n", __func__); - rtems_fatal_error_occurred(0xdeadbeef); - } - #elif defined(BSP_FEATURE_IRQ_LEGACY) - int rv = 0; - rtems_irq_connect_data cd = { - .name = ctx->irq, - .hdl = isr, - .handle = tty - }; - rv = BSP_remove_rtems_irq_handler(&cd); - if (rv == 0) { - /* FIXME */ - printk("%s: Error: Remove interrupt handler\n", __func__); - rtems_fatal_error_occurred(0xdeadbeef); - } - #endif -} - -/* - * ns16550_close - */ - -static void ns16550_close( - struct rtems_termios_tty *tty, - rtems_termios_device_context *base, - rtems_libio_open_close_args_t *args -) -{ - ns16550_context *ctx = (ns16550_context *) base; - - ns16550_enable_interrupts(ctx, NS16550_DISABLE_ALL_INTR); - - if (tty->handler.mode == TERMIOS_IRQ_DRIVEN) { - ns16550_cleanup_interrupts(tty, ctx, ns16550_isr); - } else if (tty->handler.mode == TERMIOS_TASK_DRIVEN) { - ns16550_cleanup_interrupts(tty, ctx, ns16550_isr_task); - } -} - -/** - * @brief Polled write for NS16550. - */ -void ns16550_polled_putchar(rtems_termios_device_context *base, char out) -{ - ns16550_context *ctx = (ns16550_context *) base; - uintptr_t port = ctx->port; - ns16550_get_reg get = ctx->get_reg; - ns16550_set_reg set = ctx->set_reg; - uint32_t status = 0; - rtems_interrupt_lock_context lock_context; - - /* Save port interrupt mask */ - uint32_t interrupt_mask = get( port, NS16550_INTERRUPT_ENABLE); - - /* Disable port interrupts */ - ns16550_enable_interrupts(ctx, NS16550_DISABLE_ALL_INTR); - - while (true) { - /* Try to transmit the character in a critical section */ - rtems_termios_device_lock_acquire(&ctx->base, &lock_context); - - /* Read the transmitter holding register and check it */ - status = get( port, NS16550_LINE_STATUS); - if ((status & SP_LSR_THOLD) != 0) { - /* Transmit character */ - set( port, NS16550_TRANSMIT_BUFFER, out); - - /* Finished */ - rtems_termios_device_lock_release(&ctx->base, &lock_context); - break; - } else { - rtems_termios_device_lock_release(&ctx->base, &lock_context); - } - - /* Wait for transmitter holding register to be empty */ - do { - status = get( port, NS16550_LINE_STATUS); - } while ((status & SP_LSR_THOLD) == 0); - } - - /* Restore port interrupt mask */ - set( port, NS16550_INTERRUPT_ENABLE, interrupt_mask); -} - -/* - * These routines provide control of the RTS and DTR lines - */ - -/* - * ns16550_assert_RTS - */ - -static void ns16550_assert_RTS(rtems_termios_device_context *base) -{ - ns16550_context *ctx = (ns16550_context *) base; - rtems_interrupt_lock_context lock_context; - - /* - * Assert RTS - */ - rtems_termios_device_lock_acquire(base, &lock_context); - ctx->modem_control |= SP_MODEM_RTS; - (*ctx->set_reg)(ctx->port, NS16550_MODEM_CONTROL, ctx->modem_control); - rtems_termios_device_lock_release(base, &lock_context); -} - -/* - * ns16550_negate_RTS - */ - -static void ns16550_negate_RTS(rtems_termios_device_context *base) -{ - ns16550_context *ctx = (ns16550_context *) base; - rtems_interrupt_lock_context lock_context; - - /* - * Negate RTS - */ - rtems_termios_device_lock_acquire(base, &lock_context); - ctx->modem_control &= ~SP_MODEM_RTS; - (*ctx->set_reg)(ctx->port, NS16550_MODEM_CONTROL, ctx->modem_control); - rtems_termios_device_lock_release(base, &lock_context); -} - -/* - * These flow control routines utilise a connection from the local DTR - * line to the remote CTS line - */ - -/* - * ns16550_assert_DTR - */ - -static void ns16550_assert_DTR(rtems_termios_device_context *base) -{ - ns16550_context *ctx = (ns16550_context *) base; - rtems_interrupt_lock_context lock_context; - - /* - * Assert DTR - */ - rtems_termios_device_lock_acquire(base, &lock_context); - ctx->modem_control |= SP_MODEM_DTR; - (*ctx->set_reg)(ctx->port, NS16550_MODEM_CONTROL, ctx->modem_control); - rtems_termios_device_lock_release(base, &lock_context); -} - -/* - * ns16550_negate_DTR - */ - -static void ns16550_negate_DTR(rtems_termios_device_context *base) -{ - ns16550_context *ctx = (ns16550_context *) base; - rtems_interrupt_lock_context lock_context; - - /* - * Negate DTR - */ - rtems_termios_device_lock_acquire(base, &lock_context); - ctx->modem_control &=~SP_MODEM_DTR; - (*ctx->set_reg)(ctx->port, NS16550_MODEM_CONTROL,ctx->modem_control); - rtems_termios_device_lock_release(base, &lock_context); -} - -/* - * ns16550_set_attributes - * - * This function sets the channel to reflect the requested termios - * port settings. - */ - -static bool ns16550_set_attributes( - rtems_termios_device_context *base, - const struct termios *t -) -{ - ns16550_context *ctx = (ns16550_context *) base; - uint32_t pNS16550; - uint32_t ulBaudDivisor; - uint8_t ucLineControl; - uint32_t baud_requested; - ns16550_set_reg setReg; - - pNS16550 = ctx->port; - setReg = ctx->set_reg; - - /* - * Calculate the baud rate divisor - * - * Assert ensures there is no division by 0. - */ - - baud_requested = rtems_termios_baud_to_number(t->c_ospeed); - _Assert( baud_requested != 0 ); - - ulBaudDivisor = NS16550_GetBaudDivisor(ctx, baud_requested); - - ucLineControl = 0; - - /* - * Parity - */ - - if (t->c_cflag & PARENB) { - ucLineControl |= SP_LINE_PAR; - if (!(t->c_cflag & PARODD)) - ucLineControl |= SP_LINE_ODD; - } - - /* - * Character Size - */ - - if (t->c_cflag & CSIZE) { - switch (t->c_cflag & CSIZE) { - case CS5: ucLineControl |= FIVE_BITS; break; - case CS6: ucLineControl |= SIX_BITS; break; - case CS7: ucLineControl |= SEVEN_BITS; break; - case CS8: ucLineControl |= EIGHT_BITS; break; - } - } else { - ucLineControl |= EIGHT_BITS; /* default to 9600,8,N,1 */ - } - - /* - * Stop Bits - */ - - if (t->c_cflag & CSTOPB) { - ucLineControl |= SP_LINE_STOP; /* 2 stop bits */ - } else { - ; /* 1 stop bit */ - } - - /* - * Now actually set the chip - */ - - if (ulBaudDivisor != ctx->baud_divisor || ucLineControl != ctx->line_control) { - rtems_interrupt_lock_context lock_context; - - ctx->baud_divisor = ulBaudDivisor; - ctx->line_control = ucLineControl; - - rtems_termios_device_lock_acquire(base, &lock_context); - - /* - * Set the baud rate - * - * NOTE: When the Divisor Latch Access Bit (DLAB) is set to 1, - * the transmit buffer and interrupt enable registers - * turn into the LSB and MSB divisor latch registers. - */ - - (*setReg)(pNS16550, NS16550_LINE_CONTROL, SP_LINE_DLAB); - (*setReg)(pNS16550, NS16550_TRANSMIT_BUFFER, ulBaudDivisor&0xff); - (*setReg)(pNS16550, NS16550_INTERRUPT_ENABLE, (ulBaudDivisor>>8)&0xff); - - /* - * Now write the line control - */ - (*setReg)(pNS16550, NS16550_LINE_CONTROL, ucLineControl ); - - rtems_termios_device_lock_release(base, &lock_context); - } - - return true; -} - -/** - * @brief Transmits up to @a len characters from @a buf. - * - * This routine is invoked either from task context with disabled interrupts to - * start a new transmission process with exactly one character in case of an - * idle output state or from the interrupt handler to refill the transmitter. - * - * Returns always zero. - */ -static void ns16550_write_support_int( - rtems_termios_device_context *base, - const char *buf, - size_t len -) -{ - ns16550_context *ctx = (ns16550_context *) base; - - ctx->out_total = len; - - if (len > 0) { - ctx->out_remaining = len; - ctx->out_buf = buf; - ctx->out_current = ns16550_write_to_fifo(ctx, buf, len); - - ns16550_enable_interrupts(ctx, NS16550_ENABLE_ALL_INTR); - } else { - ns16550_enable_interrupts(ctx, NS16550_ENABLE_ALL_INTR_EXCEPT_TX); - } -} - -static void ns16550_write_support_task( - rtems_termios_device_context *base, - const char *buf, - size_t len -) -{ - ns16550_context *ctx = (ns16550_context *) base; - - ctx->out_total = len; - - if (len > 0) { - ctx->out_remaining = len; - ctx->out_buf = buf; - ctx->out_current = ns16550_write_to_fifo(ctx, buf, len); - - ns16550_clear_and_set_interrupts(ctx, 0, SP_INT_TX_ENABLE); - } -} - -/* - * ns16550_write_support_polled - * - * Console Termios output entry point. - * - */ - -static void ns16550_write_support_polled( - rtems_termios_device_context *base, - const char *buf, - size_t len -) -{ - size_t nwrite = 0; - - /* - * poll each byte in the string out of the port. - */ - while (nwrite < len) { - /* - * transmit character - */ - ns16550_polled_putchar(base, *buf++); - nwrite++; - } -} - -/* - * Debug gets() support - */ -int ns16550_polled_getchar(rtems_termios_device_context *base) -{ - ns16550_context *ctx = (ns16550_context *) base; - uint32_t pNS16550; - unsigned char ucLineStatus; - uint8_t cChar; - ns16550_get_reg getReg; - - pNS16550 = ctx->port; - getReg = ctx->get_reg; - - ucLineStatus = (*getReg)(pNS16550, NS16550_LINE_STATUS); - if (ucLineStatus & SP_LSR_RDY) { - cChar = (*getReg)(pNS16550, NS16550_RECEIVE_BUFFER); - return (int)cChar; - } - return -1; -} - -/* - * Flow control is only supported when using interrupts - */ - -const rtems_termios_device_flow ns16550_flow_rtscts = { - .stop_remote_tx = ns16550_negate_RTS, - .start_remote_tx = ns16550_assert_RTS -}; - -const rtems_termios_device_flow ns16550_flow_dtrcts = { - .stop_remote_tx = ns16550_negate_DTR, - .start_remote_tx = ns16550_assert_DTR -}; - -const rtems_termios_device_handler ns16550_handler_interrupt = { - .first_open = ns16550_open, - .last_close = ns16550_close, - .poll_read = NULL, - .write = ns16550_write_support_int, - .set_attributes = ns16550_set_attributes, - .mode = TERMIOS_IRQ_DRIVEN -}; - -const rtems_termios_device_handler ns16550_handler_polled = { - .first_open = ns16550_open, - .last_close = ns16550_close, - .poll_read = ns16550_polled_getchar, - .write = ns16550_write_support_polled, - .set_attributes = ns16550_set_attributes, - .mode = TERMIOS_POLLED -}; - -const rtems_termios_device_handler ns16550_handler_task = { - .first_open = ns16550_open, - .last_close = ns16550_close, - .poll_read = ns16550_read_task, - .write = ns16550_write_support_task, - .set_attributes = ns16550_set_attributes, - .mode = TERMIOS_TASK_DRIVEN -}; |