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2011-03-03 Joel Sherrill <joel.sherrilL@OARcorp.com>

Browse Source 
PR 1750/bsps
	* console/erc32_console.c: The new console driver did not support
	polled mode. It also had a bug in which it could lose a transmitter
	interrupt.
This commit is contained in:
Joel Sherrill
2011-03-03 14:03:48 +00:00
parent 280f82d71d
commit 5180f7cb36
2 changed files with 207 additions and 148 deletions
Download Patch File Download Diff File Expand all files Collapse all files

7
c/src/lib/libbsp/sparc/erc32/ChangeLog
View File

@@ -1,3 +1,10 @@
2011-03-03 Joel Sherrill <joel.sherrilL@OARcorp.com>
PR 1750/bsps
* console/erc32_console.c: The new console driver did not support
polled mode. It also had a bug in which it could lose a transmitter
interrupt.
2011-02-02 Ralf Corsépius <ralf.corsepius@rtems.org>
* configure.ac: Require autoconf-2.68, automake-1.11.1.

348
c/src/lib/libbsp/sparc/erc32/console/erc32_console.c
View File

@@ -27,6 +27,7 @@
#include <libchip/sersupp.h>
#include <bsp.h>
#include <bspopts.h>
#define CONSOLE_BUF_SIZE (16)
@@ -35,23 +36,32 @@
static uint8_t erc32_console_get_register(uint32_t addr, uint8_t i)
{
volatile uint32_t *reg = (volatile uint32_t *)addr;
return (uint8_t) reg [i];
volatile uint32_t *reg = (volatile uint32_t *)addr;
return (uint8_t) reg [i];
}
static void erc32_console_set_register(uint32_t addr, uint8_t i, uint8_t val)
{
volatile uint32_t *reg = (volatile uint32_t *)addr;
reg [i] = val;
volatile uint32_t *reg = (volatile uint32_t *)addr;
reg [i] = val;
}
static int erc32_console_first_open(int major, int minor, void *arg);
static ssize_t erc32_console_write_support_int(int minor, const char *buf, size_t len);
#if (CONSOLE_USE_INTERRUPTS)
static ssize_t erc32_console_write_support_int(
int minor, const char *buf, size_t len);
#else
int console_inbyte_nonblocking( int port );
static ssize_t erc32_console_write_support_polled(
int minor, const char *buf, size_t len);
#endif
static void erc32_console_initialize(int minor);
rtems_device_minor_number Console_Port_Minor = 0;
console_fns erc32_fns = {
#if (CONSOLE_USE_INTERRUPTS)
console_fns erc32_fns = {
libchip_serial_default_probe, /* deviceProbe */
erc32_console_first_open, /* deviceFirstOpen */
NULL, /* deviceLastClose */
@@ -60,48 +70,61 @@ console_fns erc32_fns = {
erc32_console_initialize, /* deviceInitialize */
NULL, /* deviceWritePolled */
NULL, /* deviceSetAttributes */
true /* deviceOutputUsesInterrupts */
};
TERMIOS_IRQ_DRIVEN /* deviceOutputUsesInterrupts */
};
#else
console_fns erc32_fns = {
libchip_serial_default_probe, /* deviceProbe */
erc32_console_first_open, /* deviceFirstOpen */
NULL, /* deviceLastClose */
console_inbyte_nonblocking, /* deviceRead */
erc32_console_write_support_polled, /* deviceWrite */
erc32_console_initialize, /* deviceInitialize */
NULL, /* deviceWritePolled */
NULL, /* deviceSetAttributes */
TERMIOS_POLLED /* deviceOutputUsesInterrupts */
};
#endif
console_tbl Console_Port_Tbl [] = {
{
.sDeviceName = "/dev/console",
.deviceType = SERIAL_CUSTOM,
.pDeviceFns = &erc32_fns,
.deviceProbe = NULL,
.pDeviceFlow = NULL,
.ulMargin = 16,
.ulHysteresis = 8,
.pDeviceParams = (void *) 1,
.ulCtrlPort1 = 0,
.ulCtrlPort2 = 0,
.ulDataPort = 0,
.getRegister = erc32_console_get_register,
.setRegister = erc32_console_set_register,
.getData = NULL,
.setData = NULL,
.ulClock = 16,
.ulIntVector = ERC32_INTERRUPT_UART_A_RX_TX
},
{
.sDeviceName = "/dev/console_b",
.deviceType = SERIAL_CUSTOM,
.pDeviceFns = &erc32_fns,
.deviceProbe = NULL,
.pDeviceFlow = NULL,
.ulMargin = 16,
.ulHysteresis = 8,
.pDeviceParams = (void *) 1,
.ulCtrlPort1 = 0,
.ulCtrlPort2 = 0,
.ulDataPort = 0,
.getRegister = erc32_console_get_register,
.setRegister = erc32_console_set_register,
.getData = NULL,
.setData = NULL,
.ulClock = 16,
.ulIntVector = ERC32_INTERRUPT_UART_B_RX_TX
},
{
.sDeviceName = "/dev/console_a",
.deviceType = SERIAL_CUSTOM,
.pDeviceFns = &erc32_fns,
.deviceProbe = NULL,
.pDeviceFlow = NULL,
.ulMargin = 16,
.ulHysteresis = 8,
.pDeviceParams = (void *) -1, /* could be baud rate */
.ulCtrlPort1 = 0,
.ulCtrlPort2 = 0,
.ulDataPort = 0,
.getRegister = erc32_console_get_register,
.setRegister = erc32_console_set_register,
.getData = NULL,
.setData = NULL,
.ulClock = 16,
.ulIntVector = ERC32_INTERRUPT_UART_A_RX_TX
},
{
.sDeviceName = "/dev/console_b",
.deviceType = SERIAL_CUSTOM,
.pDeviceFns = &erc32_fns,
.deviceProbe = NULL,
.pDeviceFlow = NULL,
.ulMargin = 16,
.ulHysteresis = 8,
.pDeviceParams = (void *) -1, /* could be baud rate */
.ulCtrlPort1 = 0,
.ulCtrlPort2 = 0,
.ulDataPort = 0,
.getRegister = erc32_console_get_register,
.setRegister = erc32_console_set_register,
.getData = NULL,
.setData = NULL,
.ulClock = 16,
.ulIntVector = ERC32_INTERRUPT_UART_B_RX_TX
},
};
/* always exactly two uarts for erc32 */
@@ -113,124 +136,151 @@ console_data Console_Port_Data [ERC32_UART_COUNT];
static int erc32_console_first_open(int major, int minor, void *arg)
{
/* Check minor number */
if (minor < 0 || minor > 1) {
return -1;
}
rtems_libio_open_close_args_t *oca = arg;
struct rtems_termios_tty *tty = oca->iop->data1;
console_tbl *ct = &Console_Port_Tbl [minor];
console_data *cd = &Console_Port_Data [minor];
cd->termios_data = tty;
rtems_termios_set_initial_baud(tty, (int32_t)ct->pDeviceParams);
return 0;
/* Check minor number */
if (minor < 0 || minor > 1) {
return -1;
}
rtems_libio_open_close_args_t *oca = arg;
struct rtems_termios_tty *tty = oca->iop->data1;
console_tbl *ct = &Console_Port_Tbl [minor];
console_data *cd = &Console_Port_Data [minor];
cd->termios_data = tty;
rtems_termios_set_initial_baud(tty, (int32_t)ct->pDeviceParams);
return 0;
}
#if (CONSOLE_USE_INTERRUPTS)
static ssize_t erc32_console_write_support_int(int minor, const char *buf, size_t len)
{
console_data *cd = &Console_Port_Data[minor];
int k = 0;
console_data *cd = &Console_Port_Data[minor];
int k = 0;
if (minor == 0) { /* uart a */
for (k = 0; k < len && (ERC32_MEC.UART_Status & ERC32_MEC_UART_STATUS_THEA); k ++) {
ERC32_MEC.UART_Channel_A = (unsigned char)buf[k];
}
ERC32_Force_interrupt(ERC32_INTERRUPT_UART_A_RX_TX);
} else { /* uart b */
for (k = 0; k < len && (ERC32_MEC.UART_Status & ERC32_MEC_UART_STATUS_THEB); k ++) {
ERC32_MEC.UART_Channel_B = (unsigned char)buf[k];
}
ERC32_Force_interrupt(ERC32_INTERRUPT_UART_B_RX_TX);
if (minor == 0) { /* uart a */
for (k = 0;
k < len && (ERC32_MEC.UART_Status & ERC32_MEC_UART_STATUS_THEA); k ++) {
ERC32_MEC.UART_Channel_A = (unsigned char)buf[k];
}
if (len > 0) {
cd->pDeviceContext = (void *)k;
cd->bActive = true;
ERC32_Force_interrupt(ERC32_INTERRUPT_UART_A_RX_TX);
} else { /* uart b */
for (k = 0;
k < len && (ERC32_MEC.UART_Status & ERC32_MEC_UART_STATUS_THEB); k ++) {
ERC32_MEC.UART_Channel_B = (unsigned char)buf[k];
}
return 0;
ERC32_Force_interrupt(ERC32_INTERRUPT_UART_B_RX_TX);
}
if (len > 0) {
cd->pDeviceContext = (void *)k;
cd->bActive = true;
}
return 0;
}
static void erc32_console_isr_a(
rtems_vector_number vector
rtems_vector_number vector
)
{
console_data *cd = &Console_Port_Data[0];
console_data *cd = &Console_Port_Data[0];
/* check for error */
if (ERC32_MEC.UART_Status & ERC32_MEC_UART_STATUS_ERRA) {
ERC32_MEC.UART_Status = ERC32_MEC_UART_STATUS_CLRA;
ERC32_MEC.Control = ERC32_MEC.Control;
}
/* check for error */
if (ERC32_MEC.UART_Status & ERC32_MEC_UART_STATUS_ERRA) {
ERC32_MEC.UART_Status = ERC32_MEC_UART_STATUS_CLRA;
ERC32_MEC.Control = ERC32_MEC.Control;
}
do {
int chars_to_dequeue = (int)cd->pDeviceContext;
int rv = 0;
int i = 0;
char buf[CONSOLE_BUF_SIZE];
do {
int chars_to_dequeue = (int)cd->pDeviceContext;
int rv = 0;
int i = 0;
char buf[CONSOLE_BUF_SIZE];
/* enqueue received chars */
while (i < CONSOLE_BUF_SIZE) {
if (ERC32_MEC.UART_Status & ERC32_MEC_UART_STATUS_DRA) {
buf[i] = ERC32_MEC.UART_Channel_A;
++i;
} else {
break;
}
}
rtems_termios_enqueue_raw_characters(cd->termios_data, buf, i);
/* enqueue received chars */
while (i < CONSOLE_BUF_SIZE) {
if (!(ERC32_MEC.UART_Status & ERC32_MEC_UART_STATUS_DRA))
break;
buf[i] = ERC32_MEC.UART_Channel_A;
++i;
}
if ( i )
rtems_termios_enqueue_raw_characters(cd->termios_data, buf, i);
/* dequeue transmitted chars */
/* dequeue transmitted chars */
if (ERC32_MEC.UART_Status & ERC32_MEC_UART_STATUS_THEA) {
rv = rtems_termios_dequeue_characters(
cd->termios_data, chars_to_dequeue);
if ( !rv ) {
cd->pDeviceContext = 0;
rv = rtems_termios_dequeue_characters(cd->termios_data, chars_to_dequeue);
if (rv == 0 && !(ERC32_MEC.UART_Status & ERC32_MEC_UART_STATUS_DRA)) {
cd->bActive = false;
ERC32_Clear_interrupt (ERC32_INTERRUPT_UART_A_RX_TX);
}
} while (ERC32_Is_interrupt_pending (ERC32_INTERRUPT_UART_A_RX_TX));
cd->bActive = false;
}
ERC32_Clear_interrupt (ERC32_INTERRUPT_UART_A_RX_TX);
}
} while (ERC32_Is_interrupt_pending (ERC32_INTERRUPT_UART_A_RX_TX));
}
static void erc32_console_isr_b(
rtems_vector_number vector
rtems_vector_number vector
)
{
console_data *cd = &Console_Port_Data[1];
console_data *cd = &Console_Port_Data[1];
/* check for error */
if (ERC32_MEC.UART_Status & ERC32_MEC_UART_STATUS_ERRB) {
ERC32_MEC.UART_Status = ERC32_MEC_UART_STATUS_CLRB;
ERC32_MEC.Control = ERC32_MEC.Control;
}
/* check for error */
if (ERC32_MEC.UART_Status & ERC32_MEC_UART_STATUS_ERRB) {
ERC32_MEC.UART_Status = ERC32_MEC_UART_STATUS_CLRB;
ERC32_MEC.Control = ERC32_MEC.Control;
}
do {
int chars_to_dequeue = (int)cd->pDeviceContext;
int rv = 0;
int i = 0;
char buf[CONSOLE_BUF_SIZE];
do {
int chars_to_dequeue = (int)cd->pDeviceContext;
int rv = 0;
int i = 0;
char buf[CONSOLE_BUF_SIZE];
/* enqueue received chars */
while (i < CONSOLE_BUF_SIZE) {
if (ERC32_MEC.UART_Status & ERC32_MEC_UART_STATUS_DRB) {
buf[i] = ERC32_MEC.UART_Channel_B;
++i;
} else {
break;
}
}
rtems_termios_enqueue_raw_characters(cd->termios_data, buf, i);
/* enqueue received chars */
while (i < CONSOLE_BUF_SIZE) {
if (!(ERC32_MEC.UART_Status & ERC32_MEC_UART_STATUS_DRB))
break;
buf[i] = ERC32_MEC.UART_Channel_B;
++i;
}
if ( i )
rtems_termios_enqueue_raw_characters(cd->termios_data, buf, i);
/* dequeue transmitted chars */
/* dequeue transmitted chars */
if (ERC32_MEC.UART_Status & ERC32_MEC_UART_STATUS_THEB) {
rv = rtems_termios_dequeue_characters(
cd->termios_data, chars_to_dequeue);
if ( !rv ) {
cd->pDeviceContext = 0;
rv = rtems_termios_dequeue_characters(cd->termios_data, chars_to_dequeue);
if (rv == 0 && !(ERC32_MEC.UART_Status & ERC32_MEC_UART_STATUS_DRB)) {
cd->bActive = false;
ERC32_Clear_interrupt (ERC32_INTERRUPT_UART_B_RX_TX);
}
} while (ERC32_Is_interrupt_pending (ERC32_INTERRUPT_UART_B_RX_TX));
cd->bActive = false;
}
ERC32_Clear_interrupt (ERC32_INTERRUPT_UART_B_RX_TX);
}
} while (ERC32_Is_interrupt_pending (ERC32_INTERRUPT_UART_B_RX_TX));
}
#else
extern void console_outbyte_polled( int port, unsigned char ch );
static ssize_t erc32_console_write_support_polled(
int minor,
const char *buf,
size_t len
)
{
int nwrite = 0;
while (nwrite < len) {
console_outbyte_polled( minor, *buf++ );
nwrite++;
}
return nwrite;
}
#endif
/*
@@ -242,21 +292,23 @@ static void erc32_console_initialize(
int minor
)
{
console_data *cd = &Console_Port_Data [minor];
console_data *cd = &Console_Port_Data [minor];
cd->bActive = false;
cd->pDeviceContext = 0;
cd->bActive = false;
cd->pDeviceContext = 0;
/*
* Initialize the Termios infrastructure. If Termios has already
* been initialized by another device driver, then this call will
* have no effect.
*/
rtems_termios_initialize();
/*
* Initialize the Termios infrastructure. If Termios has already
* been initialized by another device driver, then this call will
* have no effect.
*/
rtems_termios_initialize();
/*
* Initialize Hardware
*/
/*
* Initialize Hardware
*/
#if (CONSOLE_USE_INTERRUPTS)
set_vector(erc32_console_isr_a, CONSOLE_UART_A_TRAP, 1);
set_vector(erc32_console_isr_b, CONSOLE_UART_B_TRAP, 1);
#endif
}