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Diffstat (limited to 'c/src/lib/libbsp/powerpc/ppcn_60x/console/ns16550.c')
-rw-r--r--c/src/lib/libbsp/powerpc/ppcn_60x/console/ns16550.c632
1 files changed, 0 insertions, 632 deletions
diff --git a/c/src/lib/libbsp/powerpc/ppcn_60x/console/ns16550.c b/c/src/lib/libbsp/powerpc/ppcn_60x/console/ns16550.c
deleted file mode 100644
index 30c10f73b2..0000000000
--- a/c/src/lib/libbsp/powerpc/ppcn_60x/console/ns16550.c
+++ /dev/null
@@ -1,632 +0,0 @@
-/*
- * This file contains the TTY driver for the NS16550
- *
- * 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.
- *
- * This driver uses the termios pseudo driver.
- */
-
-#include <rtems.h>
-#include <bsp.h>
-#include <rtems/libio.h>
-#include <stdlib.h>
-
-#include "console.h"
-#include "ns16550_p.h"
-
-/*
- * Flow control is only supported when using interrupts
- */
-console_flow ns16550_flow_RTSCTS =
-{
- ns16550_negate_RTS, /* deviceStopRemoteTx */
- ns16550_assert_RTS /* deviceStartRemoteTx */
-};
-
-console_flow ns16550_flow_DTRCTS =
-{
- ns16550_negate_DTR, /* deviceStopRemoteTx */
- ns16550_assert_DTR /* deviceStartRemoteTx */
-};
-
-console_fns ns16550_fns =
-{
- ns16550_probe, /* deviceProbe */
- ns16550_open, /* deviceFirstOpen */
- ns16550_flush, /* deviceLastClose */
- NULL, /* deviceRead */
- ns16550_write_support_int, /* deviceWrite */
- ns16550_initialize_interrupts, /* deviceInitialize */
- ns16550_write_polled, /* deviceWritePolled */
- FALSE, /* deviceOutputUsesInterrupts */
-};
-
-console_fns ns16550_fns_polled =
-{
- ns16550_probe, /* deviceProbe */
- ns16550_open, /* deviceFirstOpen */
- ns16550_close, /* deviceLastClose */
- ns16550_inbyte_nonblocking_polled, /* deviceRead */
- ns16550_write_support_polled, /* deviceWrite */
- ns16550_init, /* deviceInitialize */
- ns16550_write_polled, /* deviceWritePolled */
- FALSE, /* deviceOutputUsesInterrupts */
-};
-
-/*
- * Console Device Driver Entry Points
- */
-static boolean ns16550_probe(int minor)
-{
- /*
- * If the configuration dependant probe has located the device then
- * assume it is there
- */
- return(TRUE);
-}
-
-static void ns16550_init(int minor)
-{
- PSP_READ_REGISTERS pNS16550Read;
- PSP_WRITE_REGISTERS pNS16550Write;
- unsigned8 ucTrash;
- unsigned8 ucDataByte;
- unsigned32 ulBaudDivisor;
- ns16550_context *pns16550Context;
-
- pns16550Context=(ns16550_context *)malloc(sizeof(ns16550_context));
-
- Console_Port_Data[minor].pDeviceContext=(void *)pns16550Context;
- pns16550Context->ucModemCtrl=SP_MODEM_IRQ;
-
- pNS16550Read=(PSP_READ_REGISTERS)Console_Port_Tbl[minor].ulCtrlPort1;
- pNS16550Write=(PSP_WRITE_REGISTERS)pNS16550Read;
-
- /* Clear the divisor latch, clear all interrupt enables,
- * and reset and
- * disable the FIFO's.
- */
-
- outport_byte(&pNS16550Write->LineControl, 0x0);
- outport_byte(&pNS16550Write->InterruptEnable, 0x0);
-
- /* Set the divisor latch and set the baud rate. */
-
- ulBaudDivisor=NS16550_Baud(
- (unsigned32)Console_Port_Tbl[minor].pDeviceParams);
- ucDataByte = SP_LINE_DLAB;
- outport_byte(&pNS16550Write->LineControl, ucDataByte);
- outport_byte(&pNS16550Write->TransmitBuffer, ulBaudDivisor&0xff);
- outport_byte(&pNS16550Write->InterruptEnable, (ulBaudDivisor>>8)&0xff);
-
- /* Clear the divisor latch and set the character size to eight bits */
- /* with one stop bit and no parity checking. */
-
- ucDataByte = EIGHT_BITS;
- outport_byte(&pNS16550Write->LineControl, ucDataByte);
-
- /* Enable and reset transmit and receive FIFOs. TJA */
- ucDataByte = SP_FIFO_ENABLE;
- outport_byte(&pNS16550Write->FifoControl, ucDataByte);
-
- ucDataByte = SP_FIFO_ENABLE | SP_FIFO_RXRST | SP_FIFO_TXRST;
- outport_byte(&pNS16550Write->FifoControl, ucDataByte);
-
- /*
- * Disable interrupts
- */
- ucDataByte = 0;
- outport_byte(&pNS16550Write->InterruptEnable, ucDataByte);
-
- /* Set data terminal ready. */
- /* And open interrupt tristate line */
-
- outport_byte(&pNS16550Write->ModemControl,
- pns16550Context->ucModemCtrl);
-
- inport_byte(&pNS16550Read->LineStatus, ucTrash);
- inport_byte(&pNS16550Read->ReceiveBuffer, ucTrash);
-}
-
-static int ns16550_open(
- int major,
- int minor,
- void * arg
-)
-{
- PSP_WRITE_REGISTERS pNS16550Write;
-
- pNS16550Write=(PSP_WRITE_REGISTERS)Console_Port_Tbl[minor].ulCtrlPort1;
-
- /*
- * Assert DTR
- */
- if(Console_Port_Tbl[minor].pDeviceFlow
- !=&ns16550_flow_DTRCTS)
- {
- ns16550_assert_DTR(minor);
- }
-
- return(RTEMS_SUCCESSFUL);
-}
-
-static int ns16550_close(
- int major,
- int minor,
- void * arg
-)
-{
- PSP_WRITE_REGISTERS pNS16550Write;
-
- pNS16550Write=(PSP_WRITE_REGISTERS)Console_Port_Tbl[minor].ulCtrlPort1;
-
- /*
- * Negate DTR
- */
- if(Console_Port_Tbl[minor].pDeviceFlow
- !=&ns16550_flow_DTRCTS)
- {
- ns16550_negate_DTR(minor);
- }
-
- return(RTEMS_SUCCESSFUL);
-}
-
-/*
- * ns16550_write_polled
- */
-static void ns16550_write_polled(
- int minor,
- char cChar
-)
-{
- PSP_READ_REGISTERS pNS16550Read;
- PSP_WRITE_REGISTERS pNS16550Write;
- unsigned char ucLineStatus;
- int iTimeout;
-
- pNS16550Read=(PSP_READ_REGISTERS)Console_Port_Tbl[minor].ulCtrlPort1;
- pNS16550Write=(PSP_WRITE_REGISTERS)pNS16550Read;
-
- /*
- * wait for transmitter holding register to be empty
- */
- iTimeout=1000;
- inport_byte(&pNS16550Read->LineStatus, ucLineStatus);
- while ((ucLineStatus & SP_LSR_THOLD) == 0)
- {
- /*
- * Yield while we wait
- */
- if(_System_state_Is_up(_System_state_Get()))
- {
- rtems_task_wake_after(RTEMS_YIELD_PROCESSOR);
- }
- inport_byte(&pNS16550Read->LineStatus, ucLineStatus);
- if(!--iTimeout)
- {
- break;
- }
- }
-
- /*
- * transmit character
- */
- outport_byte(&pNS16550Write->TransmitBuffer, cChar);
-}
-
-/*
- * These routines provide control of the RTS and DTR lines
- */
-/*
- * ns16550_assert_RTS
- */
-static void ns16550_assert_RTS(int minor)
-{
- PSP_WRITE_REGISTERS pNS16550Write;
- unsigned32 Irql;
- ns16550_context *pns16550Context;
-
- pns16550Context=(ns16550_context *)
- Console_Port_Data[minor].pDeviceContext;
-
- pNS16550Write=(PSP_WRITE_REGISTERS)Console_Port_Tbl[minor].ulCtrlPort1;
-
- /*
- * Assert RTS
- */
- rtems_interrupt_disable(Irql);
- pns16550Context->ucModemCtrl|=SP_MODEM_RTS;
- outport_byte(&pNS16550Write->ModemControl,
- pns16550Context->ucModemCtrl);
- rtems_interrupt_enable(Irql);
-}
-
-/*
- * ns16550_negate_RTS
- */
-static void ns16550_negate_RTS(int minor)
-{
- PSP_WRITE_REGISTERS pNS16550Write;
- unsigned32 Irql;
- ns16550_context *pns16550Context;
-
- pns16550Context=(ns16550_context *)
- Console_Port_Data[minor].pDeviceContext;
-
- pNS16550Write=(PSP_WRITE_REGISTERS)Console_Port_Tbl[minor].ulCtrlPort1;
-
- /*
- * Negate RTS
- */
- rtems_interrupt_disable(Irql);
- pns16550Context->ucModemCtrl&=~SP_MODEM_RTS;
- outport_byte(&pNS16550Write->ModemControl,
- pns16550Context->ucModemCtrl);
- rtems_interrupt_enable(Irql);
-}
-
-/*
- * 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(int minor)
-{
- PSP_WRITE_REGISTERS pNS16550Write;
- unsigned32 Irql;
- ns16550_context *pns16550Context;
-
- pns16550Context=(ns16550_context *)
- Console_Port_Data[minor].pDeviceContext;
-
- pNS16550Write=(PSP_WRITE_REGISTERS)Console_Port_Tbl[minor].ulCtrlPort1;
-
- /*
- * Assert DTR
- */
- rtems_interrupt_disable(Irql);
- pns16550Context->ucModemCtrl|=SP_MODEM_DTR;
- outport_byte(&pNS16550Write->ModemControl,
- pns16550Context->ucModemCtrl);
- rtems_interrupt_enable(Irql);
-}
-
-/*
- * ns16550_negate_DTR
- */
-static void ns16550_negate_DTR(int minor)
-{
- PSP_WRITE_REGISTERS pNS16550Write;
- unsigned32 Irql;
- ns16550_context *pns16550Context;
-
- pns16550Context=(ns16550_context *)
- Console_Port_Data[minor].pDeviceContext;
-
- pNS16550Write=(PSP_WRITE_REGISTERS)Console_Port_Tbl[minor].ulCtrlPort1;
-
- /*
- * Negate DTR
- */
- rtems_interrupt_disable(Irql);
- pns16550Context->ucModemCtrl&=~SP_MODEM_DTR;
- outport_byte(&pNS16550Write->ModemControl,
- pns16550Context->ucModemCtrl);
- rtems_interrupt_enable(Irql);
-}
-
-/*
- * ns16550_isr
- *
- * This routine is the console interrupt handler for COM1 and COM2
- *
- * Input parameters:
- * vector - vector number
- *
- * Output parameters: NONE
- *
- * Return values: NONE
- */
-
-static void ns16550_process(
- int minor
-)
-{
- PSP_READ_REGISTERS pNS16550Read;
- PSP_WRITE_REGISTERS pNS16550Write;
- volatile unsigned8 ucLineStatus, ucInterruptId;
- char cChar;
-
- pNS16550Read=(PSP_READ_REGISTERS)Console_Port_Tbl[minor].ulCtrlPort1;
- pNS16550Write=(PSP_WRITE_REGISTERS)pNS16550Read;
-
- do
- {
- /*
- * Deal with any received characters
- */
- while(TRUE)
- {
- inport_byte(&pNS16550Read->LineStatus, ucLineStatus);
- if(~ucLineStatus & SP_LSR_RDY)
- {
- break;
- }
- inport_byte(&pNS16550Read->ReceiveBuffer, cChar);
- rtems_termios_enqueue_raw_characters(
- Console_Port_Data[minor].termios_data,
- &cChar, 1 );
- }
-
- while(TRUE)
- {
- if(Ring_buffer_Is_empty(
- &Console_Port_Data[minor].TxBuffer))
- {
- Console_Port_Data[minor].bActive=FALSE;
- if(Console_Port_Tbl[minor].pDeviceFlow
- !=&ns16550_flow_RTSCTS)
- {
- ns16550_negate_RTS(minor);
- }
- /*
- * There is no data to transmit
- */
- break;
- }
-
- inport_byte(&pNS16550Read->LineStatus, ucLineStatus);
- if(~ucLineStatus & SP_LSR_THOLD)
- {
- /*
- * We'll get another interrupt when
- * the transmitter holding reg. becomes
- * free again
- */
- break;
- }
-
- Ring_buffer_Remove_character(
- &Console_Port_Data[minor].TxBuffer,
- cChar);
- /*
- * transmit character
- */
- outport_byte(&pNS16550Write->TransmitBuffer, cChar);
- }
-
- inport_byte(&pNS16550Read->InterruptId, ucInterruptId);
- }
- while((ucInterruptId&0xf)!=0x1);
-}
-
-static rtems_isr ns16550_isr(
- rtems_vector_number vector
-)
-{
- int minor;
-
- for(minor=0;minor<Console_Port_Count;minor++)
- {
- if(vector==Console_Port_Tbl[minor].ulIntVector)
- {
- ns16550_process(minor);
- }
- }
-}
-
-/*
- * ns16550_flush
- */
-static int ns16550_flush(int major, int minor, void *arg)
-{
- while(!Ring_buffer_Is_empty(&Console_Port_Data[minor].TxBuffer))
- {
- /*
- * Yield while we wait
- */
- if(_System_state_Is_up(_System_state_Get()))
- {
- rtems_task_wake_after(RTEMS_YIELD_PROCESSOR);
- }
- }
-
- ns16550_close(major, minor, arg);
-
- return(RTEMS_SUCCESSFUL);
-}
-
-/*
- * ns16550_initialize_interrupts
- *
- * This routine initializes the console's receive and transmit
- * ring buffers and loads the appropriate vectors to handle the interrupts.
- *
- * Input parameters: NONE
- *
- * Output parameters: NONE
- *
- * Return values: NONE
- */
-
-static void ns16550_enable_interrupts(
- int minor
-)
-{
- PSP_WRITE_REGISTERS pNS16550Write;
- unsigned8 ucDataByte;
-
- pNS16550Write=(PSP_WRITE_REGISTERS)Console_Port_Tbl[minor].ulCtrlPort1;
-
- /*
- * Enable interrupts
- */
- ucDataByte = SP_INT_RX_ENABLE | SP_INT_TX_ENABLE;
- outport_byte(&pNS16550Write->InterruptEnable, ucDataByte);
-
-}
-
-static void ns16550_initialize_interrupts(int minor)
-{
- ns16550_init(minor);
-
- Ring_buffer_Initialize(&Console_Port_Data[minor].TxBuffer);
-
- Console_Port_Data[minor].bActive = FALSE;
-
- set_vector(ns16550_isr,
- Console_Port_Tbl[minor].ulIntVector,
- 1);
-
- ns16550_enable_interrupts(minor);
-}
-
-/*
- * ns16550_write_support_int
- *
- * Console Termios output entry point.
- *
- */
-static int ns16550_write_support_int(
- int minor,
- const char *buf,
- int len)
-{
- int i;
- unsigned32 Irql;
-
- for(i=0; i<len;)
- {
- if(Ring_buffer_Is_full(&Console_Port_Data[minor].TxBuffer))
- {
- if(!Console_Port_Data[minor].bActive)
- {
- /*
- * Wake up the device
- */
- rtems_interrupt_disable(Irql);
- Console_Port_Data[minor].bActive = TRUE;
- if(Console_Port_Tbl[minor].pDeviceFlow
- !=&ns16550_flow_RTSCTS)
- {
- ns16550_assert_RTS(minor);
- }
- ns16550_process(minor);
- rtems_interrupt_enable(Irql);
- }
- else
- {
- /*
- * Yield
- */
- rtems_task_wake_after(RTEMS_YIELD_PROCESSOR);
- }
-
- /*
- * Wait for ring buffer to empty
- */
- continue;
- }
- else
- {
- Ring_buffer_Add_character(
- &Console_Port_Data[minor].TxBuffer,
- buf[i]);
- i++;
- }
- }
-
- /*
- * Ensure that characters are on the way
- */
- if(!Console_Port_Data[minor].bActive)
- {
- /*
- * Wake up the device
- */
- rtems_interrupt_disable(Irql);
- Console_Port_Data[minor].bActive = TRUE;
- if(Console_Port_Tbl[minor].pDeviceFlow
- !=&ns16550_flow_RTSCTS)
- {
- ns16550_assert_RTS(minor);
- }
- ns16550_process(minor);
- rtems_interrupt_enable(Irql);
- }
-
- return (len);
-}
-
-/*
- * ns16550_write_support_polled
- *
- * Console Termios output entry point.
- *
- */
-static int ns16550_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
- */
- ns16550_write_polled(minor, *buf++);
- nwrite++;
- }
-
- /*
- * return the number of bytes written.
- */
- return nwrite;
-}
-
-/*
- * ns16550_inbyte_nonblocking_polled
- *
- * Console Termios polling input entry point.
- */
-
-static int ns16550_inbyte_nonblocking_polled(
- int minor
-)
-{
- PSP_READ_REGISTERS pNS16550Read;
- unsigned char ucLineStatus;
- char cChar;
-
- pNS16550Read=(PSP_READ_REGISTERS)Console_Port_Tbl[minor].ulCtrlPort1;
-
- inport_byte(&pNS16550Read->LineStatus, ucLineStatus);
- if(ucLineStatus & SP_LSR_RDY)
- {
- inport_byte(&pNS16550Read->ReceiveBuffer, cChar);
- return((int)cChar);
- }
- else
- {
- return(-1);
- }
-}
generated by cgit v1.2.3 (git 2.25.1) at 2024-04-23 16:24:44 +0000