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Diffstat (limited to '')
| -rw-r--r-- | c/src/lib/libchip/serial/mc68681.c | 756 |
1 files changed, 0 insertions, 756 deletions
diff --git a/c/src/lib/libchip/serial/mc68681.c b/c/src/lib/libchip/serial/mc68681.c deleted file mode 100644 index a917f5aa46..0000000000 --- a/c/src/lib/libchip/serial/mc68681.c +++ /dev/null @@ -1,756 +0,0 @@ -/* - * This file contains the termios TTY driver for the Motorola MC68681. - * - * This part is available from a number of secondary sources. - * In particular, we know about the following: - * - * + Exar 88c681 and 68c681 - * - * COPYRIGHT (c) 1989-1998. - * On-Line Applications Research Corporation (OAR). - * Copyright assigned to U.S. Government, 1994. - * - * The license and distribution terms for this file may be - * found in the file LICENSE in this distribution or at - * http://www.OARcorp.com/rtems/license.html. - * - * $Id$ - */ - -#include <rtems.h> -#include <rtems/libio.h> -#include <stdlib.h> - -#include <libchip/serial.h> -#include <libchip/mc68681.h> -#include "sersupp.h" -#include "mc68681_p.h" - -/* - * Flow control is only supported when using interrupts - */ - -console_fns mc68681_fns = -{ - libchip_serial_default_probe, /* deviceProbe */ - mc68681_open, /* deviceFirstOpen */ - NULL, /* deviceLastClose */ - NULL, /* deviceRead */ - mc68681_write_support_int, /* deviceWrite */ - mc68681_initialize_interrupts, /* deviceInitialize */ - mc68681_write_polled, /* deviceWritePolled */ - mc68681_set_attributes, /* deviceSetAttributes */ - TRUE /* deviceOutputUsesInterrupts */ -}; - -console_fns mc68681_fns_polled = -{ - libchip_serial_default_probe, /* deviceProbe */ - mc68681_open, /* deviceFirstOpen */ - mc68681_close, /* deviceLastClose */ - mc68681_inbyte_nonblocking_polled, /* deviceRead */ - mc68681_write_support_polled, /* deviceWrite */ - mc68681_init, /* deviceInitialize */ - mc68681_write_polled, /* deviceWritePolled */ - mc68681_set_attributes, /* deviceSetAttributes */ - FALSE, /* deviceOutputUsesInterrupts */ -}; - -extern void set_vector( rtems_isr_entry, rtems_vector_number, int ); - -/* - * Console Device Driver Entry Points - */ - -/* - * mc68681_baud_rate - * - * This routine returns the proper ACR bit and baud rate field values - * based on the requested baud rate. The baud rate set to be used - * must be configured by the user. - */ - -MC68681_STATIC int mc68681_baud_rate( - int minor, - int baud, - unsigned int *baud_mask_p, - unsigned int *acr_bit_p, - unsigned int *command -); - -/* - * mc68681_set_attributes - * - * This function sets the DUART channel to reflect the requested termios - * port settings. - */ - -MC68681_STATIC int mc68681_set_attributes( - int minor, - const struct termios *t -) -{ - unsigned32 pMC68681_port; - unsigned32 pMC68681; - unsigned int mode1; - unsigned int mode2; - unsigned int baud_mask; - unsigned int acr_bit; - unsigned int cmd; - setRegister_f setReg; - rtems_interrupt_level Irql; - - pMC68681 = Console_Port_Tbl[minor].ulCtrlPort1; - pMC68681_port = Console_Port_Tbl[minor].ulCtrlPort2; - setReg = Console_Port_Tbl[minor].setRegister; - - /* - * Set the baud rate - */ - - if (mc68681_baud_rate( minor, t->c_cflag, &baud_mask, &acr_bit, &cmd ) == -1) - return -1; - - baud_mask |= baud_mask << 4; - acr_bit <<= 7; - - /* - * Parity - */ - - mode1 = 0; - mode2 = 0; - - if (t->c_cflag & PARENB) { - if (t->c_cflag & PARODD) - mode1 |= 0x04; - else - mode1 |= 0x04; - } else { - mode1 |= 0x10; - } - - /* - * Character Size - */ - - if (t->c_cflag & CSIZE) { - switch (t->c_cflag & CSIZE) { - case CS5: break; - case CS6: mode1 |= 0x01; break; - case CS7: mode1 |= 0x02; break; - case CS8: mode1 |= 0x03; break; - } - } else { - mode1 |= 0x03; /* default to 9600,8,N,1 */ - } - - /* - * Stop Bits - */ - - if (t->c_cflag & CSTOPB) { - mode2 |= 0x07; /* 2 stop bits */ - } else { - if ((t->c_cflag & CSIZE) == CS5) /* CS5 and 2 stop bits not supported */ - return -1; - mode2 |= 0x0F; /* 1 stop bit */ - } - - rtems_interrupt_disable(Irql); - (*setReg)( pMC68681, MC68681_AUX_CTRL_REG, acr_bit ); - (*setReg)( pMC68681_port, MC68681_CLOCK_SELECT, baud_mask ); - if ( cmd ) { - (*setReg)( pMC68681_port, MC68681_COMMAND, cmd ); /* RX */ - (*setReg)( pMC68681_port, MC68681_COMMAND, cmd | 0x20 ); /* TX */ - } - (*setReg)( pMC68681_port, MC68681_COMMAND, MC68681_MODE_REG_RESET_MR_PTR ); - (*setReg)( pMC68681_port, MC68681_MODE, mode1 ); - (*setReg)( pMC68681_port, MC68681_MODE, mode2 ); - rtems_interrupt_enable(Irql); - return 0; -} - -/* - * mc68681_initialize_context - * - * This function sets the default values of the per port context structure. - */ - -MC68681_STATIC void mc68681_initialize_context( - int minor, - mc68681_context *pmc68681Context -) -{ - int port; - unsigned int pMC68681; - unsigned int pMC68681_port; - - pMC68681 = Console_Port_Tbl[minor].ulCtrlPort1; - pMC68681_port = Console_Port_Tbl[minor].ulCtrlPort2; - - pmc68681Context->mate = -1; - - for (port=0 ; port<Console_Port_Count ; port++ ) { - if ( Console_Port_Tbl[port].ulCtrlPort1 == pMC68681 && - Console_Port_Tbl[port].ulCtrlPort2 != pMC68681_port ) { - pmc68681Context->mate = port; - pmc68681Context->imr = 0; - break; - } - } - -} - -/* - * mc68681_init - * - * This function initializes the DUART to a quiecsent state. - */ - -MC68681_STATIC void mc68681_init(int minor) -{ - unsigned32 pMC68681_port; - unsigned32 pMC68681; - mc68681_context *pmc68681Context; - setRegister_f setReg; - getRegister_f getReg; - - pmc68681Context = (mc68681_context *) malloc(sizeof(mc68681_context)); - - Console_Port_Data[minor].pDeviceContext = (void *)pmc68681Context; - - mc68681_initialize_context( minor, pmc68681Context ); - - pMC68681 = Console_Port_Tbl[minor].ulCtrlPort1; - pMC68681_port = Console_Port_Tbl[minor].ulCtrlPort2; - setReg = Console_Port_Tbl[minor].setRegister; - getReg = Console_Port_Tbl[minor].getRegister; - - /* - * Reset everything and leave this port disabled. - */ - - (*setReg)( pMC68681_port, MC68681_COMMAND, MC68681_MODE_REG_RESET_RX ); - (*setReg)( pMC68681_port, MC68681_COMMAND, MC68681_MODE_REG_RESET_TX ); - (*setReg)( pMC68681_port, MC68681_COMMAND, MC68681_MODE_REG_RESET_ERROR ); - (*setReg)( pMC68681_port, MC68681_COMMAND, MC68681_MODE_REG_RESET_BREAK ); - (*setReg)( pMC68681_port, MC68681_COMMAND, MC68681_MODE_REG_STOP_BREAK ); - (*setReg)( pMC68681_port, MC68681_COMMAND, MC68681_MODE_REG_DISABLE_TX ); - (*setReg)( pMC68681_port, MC68681_COMMAND, MC68681_MODE_REG_DISABLE_RX ); - - - (*setReg)( pMC68681_port, MC68681_MODE_REG_1A, 0x00 ); - (*setReg)( pMC68681_port, MC68681_MODE_REG_2A, 0x02 ); - - /* - * Disable interrupts on RX and TX for this port - */ - - mc68681_enable_interrupts( minor, MC68681_IMR_DISABLE_ALL ); -} - -/* - * mc68681_open - * - * This function opens a port for communication. - * - * Default state is 9600 baud, 8 bits, No parity, and 1 stop bit. - */ - -MC68681_STATIC int mc68681_open( - int major, - int minor, - void *arg -) -{ - unsigned32 pMC68681; - unsigned32 pMC68681_port; - unsigned int baud; - unsigned int acr; - unsigned int vector; - unsigned int command; - rtems_interrupt_level Irql; - setRegister_f setReg; - - pMC68681 = Console_Port_Tbl[minor].ulCtrlPort1; - pMC68681_port = Console_Port_Tbl[minor].ulCtrlPort2; - setReg = Console_Port_Tbl[minor].setRegister; - vector = Console_Port_Tbl[minor].ulIntVector; - - /* XXX default baud rate should be from configuration table */ - - (void) mc68681_baud_rate( minor, B9600, &baud, &acr, &command ); - - /* - * Set the DUART channel to a default useable state - */ - - rtems_interrupt_disable(Irql); - (*setReg)( pMC68681, MC68681_AUX_CTRL_REG, acr ); - (*setReg)( pMC68681_port, MC68681_CLOCK_SELECT, baud ); - if ( command ) { - (*setReg)( pMC68681_port, MC68681_COMMAND, command ); /* RX */ - (*setReg)( pMC68681_port, MC68681_COMMAND, command | 0x20 ); /* TX */ - } - (*setReg)( pMC68681_port, MC68681_COMMAND, MC68681_MODE_REG_RESET_MR_PTR ); - (*setReg)( pMC68681_port, MC68681_MODE, 0x13 ); - (*setReg)( pMC68681_port, MC68681_MODE, 0x07 ); - rtems_interrupt_enable(Irql); - - (*setReg)( pMC68681_port, MC68681_COMMAND, MC68681_MODE_REG_ENABLE_TX ); - (*setReg)( pMC68681_port, MC68681_COMMAND, MC68681_MODE_REG_ENABLE_RX ); - - (*setReg)( pMC68681, MC68681_INTERRUPT_VECTOR_REG, vector ); - - return RTEMS_SUCCESSFUL; -} - -/* - * mc68681_close - * - * This function shuts down the requested port. - */ - -MC68681_STATIC int mc68681_close( - int major, - int minor, - void *arg -) -{ - unsigned32 pMC68681; - unsigned32 pMC68681_port; - setRegister_f setReg; - - pMC68681 = Console_Port_Tbl[minor].ulCtrlPort1; - pMC68681_port = Console_Port_Tbl[minor].ulCtrlPort2; - setReg = Console_Port_Tbl[minor].setRegister; - - /* - * Disable interrupts from this channel and then disable it totally. - */ - -#if 0 - (*setReg)( pMC68681_port, MC68681_COMMAND, MC68681_MODE_REG_DISABLE_TX ); - (*setReg)( pMC68681_port, MC68681_COMMAND, MC68681_MODE_REG_DISABLE_RX ); -#endif - - return(RTEMS_SUCCESSFUL); -} - -/* - * mc68681_write_polled - * - * This routine polls out the requested character. - */ - -MC68681_STATIC void mc68681_write_polled( - int minor, - char cChar -) -{ - unsigned32 pMC68681_port; - unsigned char ucLineStatus; - int iTimeout; - getRegister_f getReg; - setRegister_f setReg; - - pMC68681_port = Console_Port_Tbl[minor].ulCtrlPort2; - getReg = Console_Port_Tbl[minor].getRegister; - setReg = Console_Port_Tbl[minor].setRegister; - - /* - * wait for transmitter holding register to be empty - */ - iTimeout = 1000; - ucLineStatus = (*getReg)(pMC68681_port, MC68681_STATUS); - while ((ucLineStatus & (MC68681_TX_READY|MC68681_TX_EMPTY)) == 0) { - - if ((ucLineStatus & 0xF0)) - (*setReg)( pMC68681_port, MC68681_COMMAND, MC68681_MODE_REG_RESET_ERROR ); - - /* - * Yield while we wait - */ - -#if 0 - if(_System_state_Is_up(_System_state_Get())) { - rtems_task_wake_after(RTEMS_YIELD_PROCESSOR); - } -#endif - ucLineStatus = (*getReg)(pMC68681_port, MC68681_STATUS); - if(!--iTimeout) { - break; - } - } - - /* - * transmit character - */ - - (*setReg)(pMC68681_port, MC68681_TX_BUFFER, cChar); -} - -/* - * mc68681_isr - * - * This is the single interrupt entry point which parcels interrupts - * out to the various ports. - */ - -MC68681_STATIC rtems_isr mc68681_isr( - rtems_vector_number vector -) -{ - int minor; - - for(minor=0 ; minor<Console_Port_Count ; minor++) { - if(Console_Port_Tbl[minor].ulIntVector == vector && - Console_Port_Tbl[minor].deviceType == SERIAL_MC68681 ) { - mc68681_process(minor); - } - } -} - -/* - * mc68681_initialize_interrupts - * - * This routine initializes the console's receive and transmit - * ring buffers and loads the appropriate vectors to handle the interrupts. - */ - -MC68681_STATIC void mc68681_initialize_interrupts(int minor) -{ - mc68681_init(minor); - - Console_Port_Data[minor].bActive = FALSE; - - set_vector(mc68681_isr, Console_Port_Tbl[minor].ulIntVector, 1); - - mc68681_enable_interrupts(minor,MC68681_IMR_ENABLE_ALL_EXCEPT_TX); -} - -/* - * mc68681_write_support_int - * - * Console Termios output entry point when using interrupt driven output. - */ - -MC68681_STATIC int mc68681_write_support_int( - int minor, - const char *buf, - int len -) -{ - unsigned32 Irql; - unsigned32 pMC68681_port; - setRegister_f setReg; - - pMC68681_port = Console_Port_Tbl[minor].ulCtrlPort2; - setReg = Console_Port_Tbl[minor].setRegister; - - /* - * We are using interrupt driven output and termios only sends us - * one character at a time. - */ - - if ( !len ) - return 0; - - /* - * Put the character out and enable interrupts if necessary. - */ - - rtems_interrupt_disable(Irql); - if ( Console_Port_Data[minor].bActive == FALSE ) { - Console_Port_Data[minor].bActive = TRUE; - mc68681_enable_interrupts(minor, MC68681_IMR_ENABLE_ALL); - } - (*setReg)(pMC68681_port, MC68681_TX_BUFFER, *buf); - rtems_interrupt_enable(Irql); - - return 1; -} - -/* - * mc68681_write_support_polled - * - * Console Termios output entry point when using polled output. - * - */ - -MC68681_STATIC int mc68681_write_support_polled( - int minor, - const char *buf, - int len -) -{ - int nwrite = 0; - - /* - * poll each byte in the string out of the port. - */ - while (nwrite < len) { - /* - * transmit character - */ - mc68681_write_polled(minor, *buf++); - nwrite++; - } - - /* - * return the number of bytes written. - */ - return nwrite; -} - -/* - * mc68681_inbyte_nonblocking_polled - * - * Console Termios polling input entry point. - */ - -MC68681_STATIC int mc68681_inbyte_nonblocking_polled( - int minor -) -{ - unsigned32 pMC68681_port; - unsigned char ucLineStatus; - unsigned char cChar; - getRegister_f getReg; - - pMC68681_port = Console_Port_Tbl[minor].ulCtrlPort2; - getReg = Console_Port_Tbl[minor].getRegister; - - ucLineStatus = (*getReg)(pMC68681_port, MC68681_STATUS); - if(ucLineStatus & MC68681_RX_READY) { - cChar = (*getReg)(pMC68681_port, MC68681_RX_BUFFER); - return (int)cChar; - } else { - return -1; - } -} - -/* - * mc68681_baud_rate - */ - -MC68681_STATIC int mc68681_baud_rate( - int minor, - int baud, - unsigned int *baud_mask_p, - unsigned int *acr_bit_p, - unsigned int *command -) -{ - unsigned int baud_mask; - unsigned int acr_bit; - int status; - int is_extended; - int baud_requested; - mc68681_baud_table_t *baud_tbl; - - baud_mask = 0; - acr_bit = 0; - status = 0; - - if ( !(Console_Port_Tbl[minor].ulDataPort & MC68681_DATA_BAUD_RATE_SET_1) ) - acr_bit = 1; - - is_extended = 0; - - switch (Console_Port_Tbl[minor].ulDataPort & MC68681_XBRG_MASK) { - case MC68681_XBRG_IGNORED: - *command = 0x00; - break; - case MC68681_XBRG_ENABLED: - *command = 0x80; - is_extended = 1; - break; - case MC68681_XBRG_DISABLED: - *command = 0x90; - break; - } - - baud_requested = baud & CBAUD; - if (!baud_requested) - baud_requested = B9600; /* default to 9600 baud */ - - baud_requested = termios_baud_to_index( baud_requested ); - - baud_tbl = (mc68681_baud_table_t *) Console_Port_Tbl[minor].ulClock; - if (!baud_tbl) - rtems_fatal_error_occurred(RTEMS_INVALID_ADDRESS); - - if ( is_extended ) - baud_mask = (unsigned int)baud_tbl[ acr_bit + 2 ][ baud_requested ]; - else - baud_mask = baud_tbl[ acr_bit ][ baud_requested ]; - - if ( baud_mask == MC68681_BAUD_NOT_VALID ) - status = -1; - - /* - * upper nibble is receiver and lower nibble is transmitter - */ - - *baud_mask_p = (baud_mask << 4) | baud_mask; - *acr_bit_p = acr_bit; - return status; -} - -/* - * mc68681_process - * - * This routine is the per port console interrupt handler. - */ - -MC68681_STATIC void mc68681_process( - int minor -) -{ - unsigned32 pMC68681; - unsigned32 pMC68681_port; - volatile unsigned8 ucLineStatus; - unsigned char cChar; - getRegister_f getReg; - setRegister_f setReg; - - pMC68681 = Console_Port_Tbl[minor].ulCtrlPort1; - pMC68681_port = Console_Port_Tbl[minor].ulCtrlPort2; - getReg = Console_Port_Tbl[minor].getRegister; - setReg = Console_Port_Tbl[minor].setRegister; - - /* - * Deal with any received characters - */ - while(TRUE) { - ucLineStatus = (*getReg)(pMC68681_port, MC68681_STATUS); - if(!(ucLineStatus & MC68681_RX_READY)) { - break; - } - /* - * If there is a RX error, then dump all the data. - */ - if ( ucLineStatus & MC68681_RX_ERRORS ) { - do { - cChar = (*getReg)(pMC68681_port, MC68681_RX_BUFFER); - ucLineStatus = (*getReg)(pMC68681_port, MC68681_STATUS); - } while ( ucLineStatus & MC68681_RX_READY ); - continue; - } - cChar = (*getReg)(pMC68681_port, MC68681_RX_BUFFER); - rtems_termios_enqueue_raw_characters( - Console_Port_Data[minor].termios_data, - &cChar, - 1 - ); - } - - /* - * Deal with the transmitter - */ - - ucLineStatus = (*getReg)(pMC68681, MC68681_INTERRUPT_STATUS_REG); - if (pMC68681 != pMC68681_port) - ucLineStatus >>= 4; - - if(ucLineStatus & MC68681_IR_TX_READY) { - if (rtems_termios_dequeue_characters( - Console_Port_Data[minor].termios_data, 1)) { - Console_Port_Data[minor].bActive = FALSE; - mc68681_enable_interrupts(minor, MC68681_IMR_ENABLE_ALL_EXCEPT_TX); - } - } - -} - -/* - * mc68681_build_imr - * - * This function returns the value for the interrupt mask register for this - * DUART. Since this is a shared register, we must look at the other port - * on this chip to determine whether or not it is using interrupts. - */ - -MC68681_STATIC unsigned int mc68681_build_imr( - int minor, - int enable_flag -) -{ - int mate; - int is_a; - unsigned int mask; - unsigned int mate_mask; - unsigned int pMC68681; - unsigned int pMC68681_port; - mc68681_context *pmc68681Context; - mc68681_context *mateContext; - - pMC68681 = Console_Port_Tbl[minor].ulCtrlPort1; - pMC68681_port = Console_Port_Tbl[minor].ulCtrlPort2; - pmc68681Context = (mc68681_context *) Console_Port_Data[minor].pDeviceContext; - mate = pmc68681Context->mate; - - mask = 0; - mate_mask = 0; - - is_a = (pMC68681 == pMC68681_port); - - /* - * If there is a mate for this port, get its IMR mask. - */ - - if ( mate != -1 ) { - mateContext = Console_Port_Data[mate].pDeviceContext; - - if (mateContext) - mate_mask = mateContext->imr; - } - - /* - * Calculate this port's IMR mask and save it in the context area. - */ - - if ( Console_Port_Tbl[minor].pDeviceFns->deviceOutputUsesInterrupts ) - mask = enable_flag; - - pmc68681Context->imr = mask; - - /* - * Now return the full IMR value - */ - - if (is_a) - return (mate_mask << 4) | mask; - - return (mask << 4) | mate_mask; -} - -/* - * mc68681_enable_interrupts - * - * This function enables specific interrupt sources on the DUART. - */ - -MC68681_STATIC void mc68681_enable_interrupts( - int minor, - int imr_mask -) -{ - unsigned32 pMC68681; - setRegister_f setReg; - - pMC68681 = Console_Port_Tbl[minor].ulCtrlPort1; - setReg = Console_Port_Tbl[minor].setRegister; - - /* - * Enable interrupts on RX and TX -- not break - */ - - (*setReg)( - pMC68681, - MC68681_INTERRUPT_MASK_REG, - mc68681_build_imr(minor, imr_mask) - ); -} |