From 0180acf23fe292c1acbb98f84d55428175f9bf43 Mon Sep 17 00:00:00 2001 From: Sebastian Huber Date: Tue, 24 Apr 2018 06:39:19 +0200 Subject: bsps/arm: Remove unused shared/comm/uart.c This patch is a part of the BSP source reorganization. Update #3285. --- c/src/lib/libbsp/arm/shared/comm/uart.c | 565 -------------------------------- 1 file changed, 565 deletions(-) delete mode 100644 c/src/lib/libbsp/arm/shared/comm/uart.c (limited to 'c/src/lib/libbsp/arm/shared') diff --git a/c/src/lib/libbsp/arm/shared/comm/uart.c b/c/src/lib/libbsp/arm/shared/comm/uart.c deleted file mode 100644 index e9528f1634..0000000000 --- a/c/src/lib/libbsp/arm/shared/comm/uart.c +++ /dev/null @@ -1,565 +0,0 @@ -/* - * This software is Copyright (C) 1998 by T.sqware - all rights limited - * It is provided in to the public domain "as is", can be freely modified - * as far as this copyight notice is kept unchanged, but does not imply - * an endorsement by T.sqware of the product in which it is included. - * - * COPYRIGHT (c) 2000 Canon Research France SA. - * Emmanuel Raguet, mailto:raguet@crf.canon.fr - * - * 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 -#include -#include -#include -#include -#include - -/* - * Basic 16552 driver - */ - -struct uart_data -{ - int hwFlow; - int baud; -}; - -static struct uart_data uart_data[2]; - -/* - * Macros to read/wirte register of uart, if configuration is - * different just rewrite these macros - */ - -static inline unsigned char -uread(int uart, unsigned int reg) -{ - register unsigned char val; - - val = Regs[reg]; - - return val; -} - -static inline void -uwrite(int uart, int reg, unsigned int val) -{ - - Regs[reg] = val; - -} - -#ifdef UARTDEBUG - static void -uartError(int uart) -{ - unsigned char uartStatus, dummy; - - uartStatus = uread(uart, LSR); - dummy = uread(uart, RBR); - - if (uartStatus & OE) - printk("********* Over run Error **********\n"); - if (uartStatus & PE) - printk("********* Parity Error **********\n"); - if (uartStatus & FE) - printk("********* Framing Error **********\n"); - if (uartStatus & BI) - printk("********* Parity Error **********\n"); - if (uartStatus & ERFIFO) - printk("********* Error receive Fifo **********\n"); - -} -#else -inline void uartError(int uart) -{ - unsigned char uartStatus; - - uartStatus = uread(uart, LSR); - uartStatus = uread(uart, RBR); -} -#endif - -/* - * Uart initialization, it is hardcoded to 8 bit, no parity, - * one stop bit, FIFO, things to be changed - * are baud rate and nad hw flow control, - * and longest rx fifo setting - */ -void -BSP_uart_init(int uart, int baud, int hwFlow) -{ - unsigned char tmp; - - /* Sanity check */ - assert(uart == BSP_UART_COM1 || uart == BSP_UART_COM2); - - switch(baud) - { - case 50: - case 75: - case 110: - case 134: - case 300: - case 600: - case 1200: - case 2400: - case 9600: - case 19200: - case 38400: - case 57600: - case 115200: - break; - default: - assert(0); - return; - } - - /* Enable UART block */ - uwrite(uart, CNT, UART_ENABLE | PAD_ENABLE); - - /* Set DLAB bit to 1 */ - uwrite(uart, LCR, DLAB); - - /* Set baud rate */ - uwrite(uart, DLL, (BSPBaseBaud/baud) & 0xff); - uwrite(uart, DLM, ((BSPBaseBaud/baud) >> 8) & 0xff); - - /* 8-bit, no parity , 1 stop */ - uwrite(uart, LCR, CHR_8_BITS); - - /* Enable FIFO */ - uwrite(uart, FCR, FIFO_EN | XMIT_RESET | RCV_RESET | RECEIVE_FIFO_TRIGGER12); - - /* Disable Interrupts */ - uwrite(uart, IER, 0); - - /* Read status to clear them */ - tmp = uread(uart, LSR); - tmp = uread(uart, RBR); - - /* Remember state */ - uart_data[uart].hwFlow = hwFlow; - uart_data[uart].baud = baud; - return; -} - -/* - * Set baud - */ -void -BSP_uart_set_baud(int uart, int baud) -{ - unsigned char ier; - - /* Sanity check */ - assert(uart == BSP_UART_COM1 || uart == BSP_UART_COM2); - - /* - * This function may be called whenever TERMIOS parameters - * are changed, so we have to make sure that baud change is - * indeed required - */ - - if(baud == uart_data[uart].baud) - { - return; - } - - ier = uread(uart, IER); - - BSP_uart_init(uart, baud, uart_data[uart].hwFlow); - - uwrite(uart, IER, ier); - - return; -} - -/* - * Enable/disable interrupts - */ -void -BSP_uart_intr_ctrl(int uart, int cmd) -{ - - assert(uart == BSP_UART_COM1 || uart == BSP_UART_COM2); - - switch(cmd) - { - case BSP_UART_INTR_CTRL_DISABLE: - uwrite(uart, IER, INTERRUPT_DISABLE); - break; - case BSP_UART_INTR_CTRL_ENABLE: - uwrite(uart, IER, - (RECEIVE_ENABLE | - TRANSMIT_ENABLE | - RECEIVER_LINE_ST_ENABLE - ) - ); - break; - case BSP_UART_INTR_CTRL_TERMIOS: - uwrite(uart, IER, - (RECEIVE_ENABLE | - RECEIVER_LINE_ST_ENABLE - ) - ); - break; - case BSP_UART_INTR_CTRL_GDB: - uwrite(uart, IER, RECEIVE_ENABLE); - break; - default: - assert(0); - break; - } - - return; -} - -/* - * Status function, -1 if error - * detected, 0 if no received chars available, - * 1 if received char available, 2 if break - * is detected, it will eat break and error - * chars. It ignores overruns - we cannot do - * anything about - it execpt count statistics - * and we are not counting it. - */ -int -BSP_uart_polled_status(int uart) -{ - unsigned char val; - - assert(uart == BSP_UART_COM1 || uart == BSP_UART_COM2); - - val = uread(uart, LSR); - - if(val & BI) - { - /* BREAK found, eat character */ - uread(uart, RBR); - return BSP_UART_STATUS_BREAK; - } - - if((val & (DR | OE | FE)) == 1) - { - /* No error, character present */ - return BSP_UART_STATUS_CHAR; - } - - if((val & (DR | OE | FE)) == 0) - { - /* Nothing */ - return BSP_UART_STATUS_NOCHAR; - } - - /* - * Framing or parity error - * eat character - */ - uread(uart, RBR); - - return BSP_UART_STATUS_ERROR; -} - -/* - * Polled mode write function - */ -void -BSP_uart_polled_write(int uart, int val) -{ - unsigned char val1; - - /* Sanity check */ - assert(uart == BSP_UART_COM1 || uart == BSP_UART_COM2); - - for(;;) - { - if((val1=uread(uart, LSR)) & THRE) - { - break; - } - } - - uwrite(uart, THR, val & 0xff); - - return; -} - -void -BSP_output_char_via_serial(int val) -{ - BSP_uart_polled_write(BSPConsolePort, val); -} - -/* - * Polled mode read function - */ -int -BSP_uart_polled_read(int uart) -{ - unsigned char val; - - assert(uart == BSP_UART_COM1 || uart == BSP_UART_COM2); - - for(;;) - { - if(uread(uart, LSR) & DR) - { - break; - } - } - - val = uread(uart, RBR); - - return (int)(val & 0xff); -} - -unsigned -BSP_poll_char_via_serial() -{ - return BSP_uart_polled_read(BSPConsolePort); -} - -/* ================ Termios support =================*/ - -static volatile int termios_stopped_com1 = 0; -static volatile int termios_tx_active_com1 = 0; -static void* termios_ttyp_com1 = NULL; -static char termios_tx_hold_com1 = 0; -static volatile char termios_tx_hold_valid_com1 = 0; - -static volatile int termios_stopped_com2 = 0; -static volatile int termios_tx_active_com2 = 0; -static void* termios_ttyp_com2 = NULL; -static char termios_tx_hold_com2 = 0; -static volatile char termios_tx_hold_valid_com2 = 0; - -/* - * Set channel parameters - */ -void -BSP_uart_termios_set(int uart, void *ttyp) -{ - assert(uart == BSP_UART_COM1 || uart == BSP_UART_COM2); - - if(uart == BSP_UART_COM1) - { - termios_stopped_com1 = 0; - termios_tx_active_com1 = 0; - termios_ttyp_com1 = ttyp; - termios_tx_hold_com1 = 0; - termios_tx_hold_valid_com1 = 0; - } - else - { - termios_stopped_com2 = 0; - termios_tx_active_com2 = 0; - termios_ttyp_com2 = ttyp; - termios_tx_hold_com2 = 0; - termios_tx_hold_valid_com2 = 0; - } - - return; -} - -int -BSP_uart_termios_write_com1(int minor, const char *buf, int len) -{ - if(len <= 0) - { - return 0; - } - - /* If there TX buffer is busy - something is royally screwed up */ - assert((uread(BSP_UART_COM1, LSR) & THRE) != 0); - - if(termios_stopped_com1) - { - /* CTS low */ - termios_tx_hold_com1 = *buf; - termios_tx_hold_valid_com1 = 1; - return 0; - } - - /* Write character */ - uwrite(BSP_UART_COM1, THR, *buf & 0xff); - - /* Enable interrupts if necessary */ - if(!termios_tx_active_com1) - { - termios_tx_active_com1 = 1; - uwrite(BSP_UART_COM1, IER, - (RECEIVE_ENABLE | - TRANSMIT_ENABLE | - RECEIVER_LINE_ST_ENABLE - ) - ); - } - - return 0; -} - -int -BSP_uart_termios_write_com2(int minor, const char *buf, int len) -{ - if(len <= 0) - { - return 0; - } - - /* If there TX buffer is busy - something is royally screwed up */ - assert((uread(BSP_UART_COM2, LSR) & THRE) != 0); - - if(termios_stopped_com2) - { - /* CTS low */ - termios_tx_hold_com2 = *buf; - termios_tx_hold_valid_com2 = 1; - return 0; - } - - /* Write character */ - - uwrite(BSP_UART_COM2, THR, *buf & 0xff); - - /* Enable interrupts if necessary */ - if(!termios_tx_active_com2) - { - termios_tx_active_com2 = 1; - uwrite(BSP_UART_COM2, IER, - (RECEIVE_ENABLE | - TRANSMIT_ENABLE | - RECEIVER_LINE_ST_ENABLE - ) - ); - } - - return 0; -} - -void -BSP_uart_termios_isr_com1(void) -{ - unsigned char buf[40]; - int off, ret, vect; - - off = 0; - - for(;;) - { - vect = uread(BSP_UART_COM1, IIR) & 0xf; - - switch(vect) - { - case NO_MORE_INTR : - /* No more interrupts */ - if(off != 0) - { - /* Update rx buffer */ - rtems_termios_enqueue_raw_characters(termios_ttyp_com1, - (char *)buf, - off); - } - return; - case TRANSMITTER_HODING_REGISTER_EMPTY : - /* - * TX holding empty: we have to disable these interrupts - * if there is nothing more to send. - */ - - ret = rtems_termios_dequeue_characters(termios_ttyp_com1, 1); - - /* If nothing else to send disable interrupts */ - if(ret == 0) - { - uwrite(BSP_UART_COM1, IER, - (RECEIVE_ENABLE | - RECEIVER_LINE_ST_ENABLE - ) - ); - termios_tx_active_com1 = 0; - } - break; - case RECEIVER_DATA_AVAIL : - case CHARACTER_TIMEOUT_INDICATION: - /* RX data ready */ - assert(off < sizeof(buf)); - buf[off++] = uread(BSP_UART_COM1, RBR); - break; - case RECEIVER_ERROR: - /* RX error: eat character */ - uartError(BSP_UART_COM1); - break; - default: - /* Should not happen */ - assert(0); - return; - } - } -} - -void -BSP_uart_termios_isr_com2() -{ - unsigned char buf[40]; - int off, ret, vect; - - off = 0; - - for(;;) - { - vect = uread(BSP_UART_COM2, IIR) & 0xf; - - switch(vect) - { - case NO_MORE_INTR : - /* No more interrupts */ - if(off != 0) - { - /* Update rx buffer */ - rtems_termios_enqueue_raw_characters(termios_ttyp_com2, - (char *)buf, - off); - } - return; - case TRANSMITTER_HODING_REGISTER_EMPTY : - /* - * TX holding empty: we have to disable these interrupts - * if there is nothing more to send. - */ - - ret = rtems_termios_dequeue_characters(termios_ttyp_com2, 1); - - /* If nothing else to send disable interrupts */ - if(ret == 0) - { - uwrite(BSP_UART_COM2, IER, - (RECEIVE_ENABLE | - RECEIVER_LINE_ST_ENABLE - ) - ); - termios_tx_active_com2 = 0; - } - break; - case RECEIVER_DATA_AVAIL : - case CHARACTER_TIMEOUT_INDICATION: - /* RX data ready */ - assert(off < sizeof(buf)); - buf[off++] = uread(BSP_UART_COM2, RBR); - break; - case RECEIVER_ERROR: - /* RX error: eat character */ - uartError(BSP_UART_COM2); - break; - default: - /* Should not happen */ - assert(0); - return; - } - } -} -- cgit v1.2.3