This driver was initially intended for APBUART access on GRLIB PCI
peripherals (AMBA-over-PCI). There are already many APBUART drivers
for LEON. Instead of using this one the termios APBUART should work
on AMBA-over-PCI systems with recent changes on LEON3, however that
has not been tested yet.
---
c/src/lib/libbsp/sparc/Makefile.am | 1 -
c/src/lib/libbsp/sparc/leon2/Makefile.am | 1 -
c/src/lib/libbsp/sparc/leon3/Makefile.am | 3 +-
c/src/lib/libbsp/sparc/shared/include/apbuart.h | 33 -
c/src/lib/libbsp/sparc/shared/uart/apbuart.c | 897 ------------------------
5 files changed, 1 insertion(+), 934 deletions(-)
delete mode 100644 c/src/lib/libbsp/sparc/shared/uart/apbuart.c
diff --git a/c/src/lib/libbsp/sparc/Makefile.am
b/c/src/lib/libbsp/sparc/Makefile.am
index a894f34..d17d691 100644
--- a/c/src/lib/libbsp/sparc/Makefile.am
+++ b/c/src/lib/libbsp/sparc/Makefile.am
@@ -83,7 +83,6 @@ EXTRA_DIST += shared/uart/cons.c
EXTRA_DIST += shared/uart/apbuart_cons.c
EXTRA_DIST += shared/include/cons.h
EXTRA_DIST += shared/include/apbuart_cons.h
-EXTRA_DIST += shared/uart/apbuart.c
EXTRA_DIST += shared/include/apbuart.h
# CAN (OC_CAN, GRCAN)
diff --git a/c/src/lib/libbsp/sparc/leon2/Makefile.am
b/c/src/lib/libbsp/sparc/leon2/Makefile.am
index 94e10cd..349b44d 100644
--- a/c/src/lib/libbsp/sparc/leon2/Makefile.am
+++ b/c/src/lib/libbsp/sparc/leon2/Makefile.am
@@ -154,7 +154,6 @@ libbsp_a_SOURCES += ../../sparc/shared/spw/grspw_router.c
# UART (RAW)
include_bsp_HEADERS += ../../sparc/shared/include/apbuart.h
-libbsp_a_SOURCES += ../../sparc/shared/uart/apbuart.c
# I2CMST
include_bsp_HEADERS += ../../sparc/shared/include/i2cmst.h
diff --git a/c/src/lib/libbsp/sparc/leon3/Makefile.am
b/c/src/lib/libbsp/sparc/leon3/Makefile.am
index 83e1dff..52f6b56 100644
--- a/c/src/lib/libbsp/sparc/leon3/Makefile.am
+++ b/c/src/lib/libbsp/sparc/leon3/Makefile.am
@@ -170,8 +170,7 @@ libbsp_a_SOURCES += ../../sparc/shared/spw/grspw_router.c
# UART
include_bsp_HEADERS += ../../sparc/shared/include/apbuart.h \
../../sparc/shared/include/apbuart_termios.h
-libbsp_a_SOURCES += ../../sparc/shared/uart/apbuart.c \
- ../../sparc/shared/uart/apbuart_termios.c
+libbsp_a_SOURCES += ../../sparc/shared/uart/apbuart_termios.c
# I2CMST
include_bsp_HEADERS += ../../sparc/shared/include/i2cmst.h
diff --git a/c/src/lib/libbsp/sparc/shared/include/apbuart.h
b/c/src/lib/libbsp/sparc/shared/include/apbuart.h
index 326e769..a324805 100644
--- a/c/src/lib/libbsp/sparc/shared/include/apbuart.h
+++ b/c/src/lib/libbsp/sparc/shared/include/apbuart.h
@@ -25,33 +25,6 @@
extern "C" {
#endif
-typedef struct {
- unsigned int hw_dovr;
- unsigned int hw_parity;
- unsigned int hw_frame;
- unsigned int sw_dovr;
- unsigned int rx_cnt;
- unsigned int tx_cnt;
-} apbuart_stats;
-
-#define APBUART_START 0
-#define APBUART_STOP 1
-#define APBUART_SET_RXFIFO_LEN 2
-#define APBUART_SET_TXFIFO_LEN 3
-#define APBUART_SET_BAUDRATE 4
-#define APBUART_SET_SCALER 5
-#define APBUART_SET_BLOCKING 6
-#define APBUART_SET_ASCII_MODE 7
-
-
-#define APBUART_GET_STATS 16
-#define APBUART_CLR_STATS 17
-
-#define APBUART_BLK_RX 0x1
-#define APBUART_BLK_TX 0x2
-#define APBUART_BLK_FLUSH 0x4
-
-
#define APBUART_CTRL_RE 0x1
#define APBUART_CTRL_TE 0x2
#define APBUART_CTRL_RI 0x4
@@ -80,12 +53,6 @@ typedef struct {
#define APBUART_STATUS_TF 0x200
#define APBUART_STATUS_RF 0x400
-/* Register APBUART driver
- * bus = pointer to AMBA bus description used to search for APBUART(s).
- * (&ambapp_plb for LEON3), (LEON2: see amba_scan)
- */
-int apbuart_register (struct ambapp_bus *bus);
-
#ifdef __cplusplus
}
#endif
diff --git a/c/src/lib/libbsp/sparc/shared/uart/apbuart.c
b/c/src/lib/libbsp/sparc/shared/uart/apbuart.c
deleted file mode 100644
index 171f114..0000000
--- a/c/src/lib/libbsp/sparc/shared/uart/apbuart.c
+++ /dev/null
@@ -1,897 +0,0 @@
-/*
- * This file contains the driver for the APBUART serial port.
- * No console driver, only char driver.
- *
- * COPYRIGHT (c) 2007.
- * Gaisler Research.
- *
- * 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.
- *
- *
- * 2007-07-11, Daniel Hellstrom <dan...@gaisler.com>
- * Added ioctl command APBUART_CLR_STATS
- */
-
-#include <bsp.h>
-#include <rtems/libio.h>
-#include <stdlib.h>
-#include <assert.h>
-#include <rtems/bspIo.h>
-#include <string.h>
-
-#include <ambapp.h>
-#include <grlib.h>
-#include <bsp/apbuart.h>
-
-#ifndef DEFAULT_TXBUF_SIZE
- #define DEFAULT_TXBUF_SIZE 32
-#endif
-#ifndef DEFAULT_RXBUF_SIZE
- #define DEFAULT_RXBUF_SIZE 32
-#endif
-
-#ifndef APBUART_PREFIX
- #define APBUART_PREFIX(name) apbuart##name
-#else
- #define APBUART_REGISTER_STATIC
-#endif
-
-#if !defined(APBUART_DEVNAME) || !defined(APBUART_DEVNAME_NO)
- #undef APBUART_DEVNAME
- #undef APBUART_DEVNAME_NO
- #define APBUART_DEVNAME "/dev/apbuart0"
- #define APBUART_DEVNAME_NO(devstr,no) ((devstr)[12]='0'+(no))
-#endif
-
-#ifndef APBUART_REG_INT
- #define APBUART_REG_INT(handler,irq,arg) set_vector(handler,irq+0x10,1)
- #undef APBUART_DEFINE_INTHANDLER
- #define APBUART_DEFINE_INTHANDLER
-#endif
-
-/* Default to 40MHz system clock */
-/*#ifndef SYS_FREQ_HZ
- #define SYS_FREQ_HZ 40000000
-#endif*/
-
-typedef struct {
- int size;
- unsigned char *buf,
- *tail,
- *head,
- *max;
- int full; /* no more place in fifo */
-} apbuart_fifo;
-
-static apbuart_fifo *apbuart_fifo_create(int size);
-static void apbuart_fifo_free(apbuart_fifo *fifo);
-static inline int apbuart_fifo_isFull(apbuart_fifo *fifo);
-static inline int apbuart_fifo_isEmpty(apbuart_fifo *fifo);
-static int apbuart_fifo_put(apbuart_fifo *fifo, unsigned char c);
-static int apbuart_fifo_get(apbuart_fifo *fifo, unsigned char *c);
-static int inline apbuart_fifo_peek(apbuart_fifo *fifo, unsigned char **c);
-static void inline apbuart_fifo_skip(apbuart_fifo *fifo);
-
-static rtems_device_driver apbuart_initialize(rtems_device_major_number
major, rtems_device_minor_number minor, void *arg);
-static rtems_device_driver apbuart_open(rtems_device_major_number major,
rtems_device_minor_number minor, void *arg);
-static rtems_device_driver apbuart_close(rtems_device_major_number major,
rtems_device_minor_number minor, void *arg);
-static rtems_device_driver apbuart_read(rtems_device_major_number major,
rtems_device_minor_number minor, void *arg);
-static rtems_device_driver apbuart_write(rtems_device_major_number major,
rtems_device_minor_number minor, void *arg);
-static rtems_device_driver apbuart_control(rtems_device_major_number major,
rtems_device_minor_number minor, void *arg);
-
-typedef struct {
- struct apbuart_regs *regs;
- int irq;
- int minor;
- int scaler;
- unsigned int baud;
-
- int txblk; /* Make write block until at least 1 char has
- * been put into software send fifo
- */
- int tx_flush; /* Set this to block until all data has
- * placed into the hardware send fifo
- */
- int rxblk; /* Make read block until at least 1 char has
- * been received (or taken from software fifo).
- */
- int started; /* Set to 1 when in running mode */
-
- int ascii_mode; /* Set to 1 to make \n be printed as \r\n */
-
- /* TX/RX software FIFO Buffers */
- apbuart_fifo *txfifo;
- apbuart_fifo *rxfifo;
-
- apbuart_stats stats;
-
- rtems_id dev_sem;
- rtems_id rx_sem;
- rtems_id tx_sem;
-} apbuart_priv;
-
-static int dev_cnt;
-static apbuart_priv *apbuarts;
-static unsigned int sys_freq_hz;
-
-#define APBUART_DRIVER_TABLE_ENTRY { apbuart_initialize, apbuart_open,
apbuart_close, apbuart_read, apbuart_write, apbuart_control }
-
-static rtems_driver_address_table apbuart_driver = APBUART_DRIVER_TABLE_ENTRY;
-static struct ambapp_bus *amba_bus;
-
-static void apbuart_interrupt(apbuart_priv *uart);
-#ifdef APBUART_DEFINE_INTHANDLER
-static void apbuart_interrupt_handler(rtems_vector_number v);
-#endif
-static void apbuart_hw_close(apbuart_priv *uart);
-static void apbuart_hw_open(apbuart_priv *uart);
-
-/* Uncomment for debug output */
-/* #define DEBUG 1
- #define FUNCDEBUG 1 */
-
-#ifdef DEBUG
-#define DBG(x...) printk(x)
-#else
-#define DBG(x...)
-#endif
-#ifdef FUNCDEBUG
-#define FUNCDBG(x...) printk(x)
-#else
-#define FUNCDBG(x...)
-#endif
-
-#ifndef READ_REG
- #define READ_REG(address) _APBUART_READ_REG((unsigned int)(address))
- static __inline__ unsigned int _APBUART_READ_REG(unsigned int addr) {
- unsigned int tmp;
- __asm__ (" lda [%1]1, %0 "
- : "=r"(tmp)
- : "r"(addr)
- );
- return tmp;
- }
-#endif
-
-#if 0
-static int apbuart_outbyte_try(struct apbuart_regs *regs, unsigned char ch)
-{
- if ( (READ_REG(®s->status) & APBUART_STATUS_TE) == 0 )
- return -1; /* Failed */
-
- /* There is room in fifo, put ch in it */
- regs->data = (unsigned int) ch;
- return 0;
-}
-
-
-static int apbuart_inbyte_try(struct apbuart_regs *regs)
-{
- unsigned int status;
- /* Clear errors if any */
- if ( (status=READ_REG(®s->status)) & APBUART_STATUS_ERR) {
- regs->status = status & ~APBUART_STATUS_ERR;
- }
-
- /* Is Data available? */
- if ( (READ_REG(®s->status) & APBUART_STATUS_DR) == 0 )
- return -1; /* No data avail */
-
- /* Return Data */
- return (int)READ_REG(®s->data);
-}
-
-static int apbuart_write_support(apbuart_priv *uart, const char *buf, int len)
-{
- int nwrite = 0;
-
- while (nwrite < len) {
- if ( apbuart_outbyte_try(minor, *buf++) ){
- /* TX Fifo full */
-
- }
- nwrite++;
- }
- return nwrite;
-}
-#endif
-
-static void apbuart_hw_open(apbuart_priv *uart){
- unsigned int scaler;
-
- /* Calculate Baudrate */
- if ( uart->scaler > 0 ) {
- scaler = uart->scaler;
- }else{
- scaler = (((sys_freq_hz*10)/(uart->baud*8))-5)/10;
- }
-
- /* Set new baud rate */
- uart->regs->scaler = scaler;
-
- /* Enable receiver & Transmitter */
- uart->regs->ctrl = APBUART_CTRL_RE | APBUART_CTRL_RF | APBUART_CTRL_RI
| APBUART_CTRL_TI;
-}
-
-static void apbuart_hw_close(apbuart_priv *uart){
- /* disable receiver & transmitter & all IRQs */
- uart->regs->ctrl = 0;
-}
-
-#ifdef APBUART_DEFINE_INTHANDLER
-/* interrupt handler */
-static void apbuart_interrupt_handler(rtems_vector_number v){
- int minor;
-
- /* convert to */
- for(minor = 0; minor < dev_cnt; minor++) {
- if ( v == (apbuarts[minor].irq+0x10) ) {
- apbuart_interrupt(&apbuarts[minor]);
- return;
- }
- }
-}
-#endif
-
-/* The interrupt handler, taking care of the
- * APBUART hardware
- */
-static void apbuart_interrupt(apbuart_priv *uart){
- unsigned int status;
- int empty;
- unsigned char c, *next_char = NULL;
- int signal;
-
- /* Clear & record any error */
- status = READ_REG(&uart->regs->status);
- if ( status & (APBUART_STATUS_OV|APBUART_STATUS_PE|APBUART_STATUS_FE) ){
- /* Data overrun */
- if ( status & APBUART_STATUS_OV ){
- uart->stats.hw_dovr++;
- }
- /* Parity error */
- if ( status & APBUART_STATUS_PE ){
- uart->stats.hw_parity++;
- }
- /* Framing error */
- if ( status & APBUART_STATUS_FE ){
- uart->stats.hw_frame++;
- }
- uart->regs->status = status &
~(APBUART_STATUS_OV|APBUART_STATUS_PE|APBUART_STATUS_FE);
- }
-
- /* Empty RX fifo into software fifo */
- signal = 0;
- while ( (status=READ_REG(&uart->regs->status)) & APBUART_STATUS_DR ){
- c = READ_REG(&uart->regs->data);
- if ( apbuart_fifo_isFull(uart->rxfifo) ){
- uart->stats.sw_dovr++;
- DBG("]");
- break;
- }
- /* put into fifo */
- apbuart_fifo_put(uart->rxfifo,c);
-
- /* bump RX counter */
- uart->stats.rx_cnt++;
-
- signal = 1;
- }
-
- /* Wake RX thread if any */
- if ( signal )
- rtems_semaphore_release(uart->rx_sem);
-
- /* If room in HW fifo and we got more chars to be sent */
- if ( !(status & APBUART_STATUS_TF) ){
-
- if ( apbuart_fifo_isEmpty(uart->txfifo) ){
- /* Turn off TX interrupt when no data is to be sent */
- if ( status & APBUART_STATUS_TE ){
- uart->regs->ctrl = READ_REG(&uart->regs->ctrl)
& ~APBUART_CTRL_TF;
- DBG("?");
- }
- return;
- }
-
- /* signal when there will be more room in SW fifo */
- if ( apbuart_fifo_isFull(uart->txfifo) )
- signal = 1;
-
- do{
- /* Put data into HW TX fifo */
- apbuart_fifo_peek(uart->txfifo,&next_char);
- c = *next_char;
- if ( uart->ascii_mode && ( c == '\n') ){
- uart->regs->data = '\n';
- *next_char = '\r'; /* avoid sending mutiple
'\n' or '\r' */
- }else{
- uart->regs->data = c;
- apbuart_fifo_skip(uart->txfifo); /* remove sent
char from fifo */
- }
- uart->regs->ctrl = READ_REG(&uart->regs->ctrl) |
APBUART_CTRL_TE | APBUART_CTRL_TF;
- DBG("!");
- }while(!(empty=apbuart_fifo_isEmpty(uart->txfifo)) &&
-
!((status=READ_REG(&uart->regs->status))&APBUART_STATUS_TF) );
-
- /* Wake userspace thread, on empty or full fifo
- * This makes tx_flush and block work.
- */
- if ( signal || empty ){
- rtems_semaphore_release(uart->tx_sem);
- }
- }
-}
-
-#ifdef APBUART_REGISTER_STATIC
-static
-#endif
-int APBUART_PREFIX(_register)(struct ambapp_bus *bus) {
- rtems_status_code r;
- rtems_device_major_number m;
-
- amba_bus = bus;
-
- FUNCDBG("apbuart_register:\n");
-
- if ((r = rtems_io_register_driver(0, &apbuart_driver, &m)) ==
RTEMS_SUCCESSFUL) {
- DBG("APBUART driver successfully registered, major: %d\n", m);
- } else {
- switch(r) {
- case RTEMS_TOO_MANY:
- printk("APBUART rtems_io_register_driver failed:
RTEMS_TOO_MANY\n"); return -1;
- case RTEMS_INVALID_NUMBER:
- printk("APBUART rtems_io_register_driver failed:
RTEMS_INVALID_NUMBER\n"); return -1;
- case RTEMS_RESOURCE_IN_USE:
- printk("APBUART rtems_io_register_driver failed:
RTEMS_RESOURCE_IN_USE\n"); return -1;
- default:
- printk("APBUART rtems_io_register_driver failed\n");
- return -1;
- }
- }
- return 0;
-}
-
-static rtems_device_driver apbuart_initialize(rtems_device_major_number
major, rtems_device_minor_number minor, void *arg)
-{
-
- rtems_status_code status;
- int i;
- struct ambapp_apb_info dev;
- char fs_name[20];
-
- FUNCDBG("apbuart_initialize\n");
-
- /* Find all APB UART devices */
- dev_cnt = ambapp_get_number_apbslv_devices(amba_bus, VENDOR_GAISLER,
- GAISLER_APBUART);
- if ( dev_cnt < 1 ){
- /* Failed to find any CAN cores! */
- printk("APBUART: Failed to find any APBUART cores\n\r");
- return -1;
- }
-
- strcpy(fs_name,APBUART_DEVNAME);
-
- DBG("Found %d APBUART(s)\n\r",dev_cnt);
-
- /* Allocate memory for device structures */
- apbuarts = calloc(dev_cnt, sizeof(*apbuarts));
- if ( !apbuarts ){
- printk("APBUART: Failed to allocate SW memory\n\r");
- return -1;
- }
-
- /* Detect System Frequency from initialized timer */
-#ifndef SYS_FREQ_HZ
-#if defined(LEON3)
- /* LEON3: find timer address via AMBA Plug&Play info */
- {
- struct ambapp_apb_info gptimer;
- struct gptimer_regs *tregs;
-
- if ( ambapp_find_apbslv(&ambapp_plb, VENDOR_GAISLER,
- GAISLER_GPTIMER, &gptimer) == 1 ){
- tregs = (struct gptimer_regs *)gptimer.start;
- sys_freq_hz = (tregs->scaler_reload+1)*1000*1000;
- DBG("APBUART: detected %dHZ system
frequency\n\r",sys_freq_hz);
- }else{
- sys_freq_hz = 40000000; /* Default to 40MHz */
- printk("APBUART: Failed to detect system
frequency\n\r");
- }
-
- }
-#elif defined(LEON2)
- /* LEON2: use hardcoded address to get to timer */
- {
- LEON_Register_Map *regs = (LEON_Register_Map *)0x80000000;
- sys_freq_hz = (regs->Scaler_Reload+1)*1000*1000;
- }
-#else
- #error CPU not supported for OC_CAN driver
-#endif
-#else
- /* Use hardcoded frequency */
- sys_freq_hz = SYS_FREQ_HZ;
-#endif
-
- for(i=0; i<dev_cnt; i++){
- /* Get AMBA AHB device info from Plug&Play */
-
ambapp_find_apbslv_next(amba_bus,VENDOR_GAISLER,GAISLER_APBUART,&dev,i);
-
- printk("APBUART[%d]: at 0x%x irq %d
(0x%x)\n\r",i,dev.start,dev.irq,(unsigned int)&apbuarts[i]);
-
- apbuarts[i].regs = (struct apbuart_regs *)dev.start;
- apbuarts[i].irq = dev.irq;
- apbuarts[i].minor = i;
-
- /* Clear HW regs */
- apbuarts[i].regs->status = 0;
- apbuarts[i].regs->ctrl = 0;
-
- /* Allocate default software buffers */
- apbuarts[i].txfifo = apbuart_fifo_create(DEFAULT_TXBUF_SIZE);
- apbuarts[i].rxfifo = apbuart_fifo_create(DEFAULT_RXBUF_SIZE);
- if ( !apbuarts[i].txfifo || !apbuarts[i].rxfifo )
- rtems_fatal_error_occurred(RTEMS_NO_MEMORY);
-
- APBUART_DEVNAME_NO(fs_name,i);
-
- /* Bind name to device */
- DBG("APBUART[%d]: binding to name %s\n\r",i,fs_name);
- status = rtems_io_register_name(fs_name, major, i);
- if (status != RTEMS_SUCCESSFUL)
- rtems_fatal_error_occurred(status);
-
- /* Setup interrupt handler for each channel */
- APBUART_REG_INT(APBUART_PREFIX(_interrupt_handler), apbuarts[i].irq,
&apbuarts[i]);
-
- /* Device A Semaphore created with count = 1 */
- if ( rtems_semaphore_create(rtems_build_name('A', 'U', 'D',
'0'+i),
- 1,
-
RTEMS_FIFO|RTEMS_SIMPLE_BINARY_SEMAPHORE|RTEMS_NO_INHERIT_PRIORITY|RTEMS_LOCAL|RTEMS_NO_PRIORITY_CEILING,
- 0,
- &apbuarts[i].dev_sem) != RTEMS_SUCCESSFUL )
- return RTEMS_INTERNAL_ERROR;
-
- if ( rtems_semaphore_create(rtems_build_name('A', 'U', 'T',
'0'+i),
- 1,
-
RTEMS_FIFO|RTEMS_SIMPLE_BINARY_SEMAPHORE|RTEMS_NO_INHERIT_PRIORITY|RTEMS_LOCAL|RTEMS_NO_PRIORITY_CEILING,
- 0,
- &apbuarts[i].tx_sem) != RTEMS_SUCCESSFUL )
- return RTEMS_INTERNAL_ERROR;
-
- if ( rtems_semaphore_create(rtems_build_name('A', 'U', 'R',
'0'+i),
- 1,
-
RTEMS_FIFO|RTEMS_SIMPLE_BINARY_SEMAPHORE|RTEMS_NO_INHERIT_PRIORITY|RTEMS_LOCAL|RTEMS_NO_PRIORITY_CEILING,
- 0,
- &apbuarts[i].rx_sem) != RTEMS_SUCCESSFUL )
- return RTEMS_INTERNAL_ERROR;
-
- }
- return RTEMS_SUCCESSFUL;
-}
-
-static rtems_device_driver apbuart_open(rtems_device_major_number major,
rtems_device_minor_number minor, void *arg)
-{
- apbuart_priv *uart;
-
- FUNCDBG("apbuart_open: major %d, minor %d\n", major, minor);
-
- if ( (minor < 0) || (minor >= dev_cnt) ) {
- DBG("Wrong minor %d\n", minor);
- return RTEMS_INVALID_NAME;
- }
-
- uart = &apbuarts[minor];
-
- if (rtems_semaphore_obtain(uart->dev_sem, RTEMS_NO_WAIT,
RTEMS_NO_TIMEOUT) != RTEMS_SUCCESSFUL) {
- DBG("apbuart_open: resource in use\n");
- return RTEMS_RESOURCE_IN_USE;
- }
-
- /* Clear HW regs */
- uart->regs->status = 0;
- uart->regs->ctrl = 0;
-
- /* Set Defaults */
-
- /* 38400 baudrate */
- uart->scaler = 0; /* use uart->baud */
- uart->baud = 38400;
-
- /* Default to Blocking mode */
- uart->txblk = 1;
- uart->rxblk = 1;
-
- /* Default to no flush mode */
- uart->tx_flush = 0;
-
- /* non-ascii mode */
- uart->ascii_mode = 0;
-
- /* not started */
- uart->started = 0;
-
- if ( !uart->txfifo || (uart->txfifo->size!=DEFAULT_TXBUF_SIZE) ){
- apbuart_fifo_free(uart->txfifo);
- uart->txfifo = apbuart_fifo_create(DEFAULT_TXBUF_SIZE);
- }
-
- if ( !uart->rxfifo || (uart->rxfifo->size!=DEFAULT_RXBUF_SIZE) ){
- apbuart_fifo_free(uart->rxfifo);
- uart->rxfifo = apbuart_fifo_create(DEFAULT_RXBUF_SIZE);
- }
-
- if ( !uart->rxfifo || !uart->txfifo ){
- /* Failed to get memory */
- return RTEMS_NO_MEMORY;
- }
-
- /* Now user must call ioctl(START,0) to begin */
-
- return RTEMS_SUCCESSFUL;
-}
-
-static rtems_device_driver apbuart_close(rtems_device_major_number major,
rtems_device_minor_number minor, void *arg)
-{
- apbuart_priv *uart = &apbuarts[minor];
-
- FUNCDBG("apbuart_close[%d]:\n",minor);
-
- apbuart_hw_close(uart);
-
- /* Software state will be set when open is called again */
- rtems_semaphore_release(uart->rx_sem);
- rtems_semaphore_release(uart->tx_sem);
- uart->started = 0;
-
- rtems_semaphore_release(uart->dev_sem);
-
- return RTEMS_SUCCESSFUL;
-}
-
-static rtems_device_driver apbuart_read(rtems_device_major_number major,
rtems_device_minor_number minor, void *arg)
-{
- rtems_libio_rw_args_t *rw_args;
- unsigned int count = 0, oldLevel;
- unsigned char *buf;
- apbuart_priv *uart = &apbuarts[minor];
-
- rw_args = (rtems_libio_rw_args_t *) arg;
-
- FUNCDBG("apbuart_read\n");
-
- buf = (unsigned char *)rw_args->buffer;
- if ( (rw_args->count < 1) || !buf )
- return RTEMS_INVALID_NAME; /* EINVAL */
-
- rtems_interrupt_disable(oldLevel);
- do {
- if ( (unsigned int)uart < 0x40000000 ) {
- printk("UART %p is screwed\n",uart);
- }
- /* Read from SW fifo */
- if ( apbuart_fifo_get(uart->rxfifo,&buf[count]) != 0 ){
- /* non blocking or read at least 1 byte */
- if ( (count > 0) || (!uart->rxblk) )
- break; /* Return */
-
- rtems_interrupt_enable(oldLevel);
-
- /* Block thread until a char is received */
- rtems_semaphore_obtain(uart->rx_sem, RTEMS_WAIT,
RTEMS_NO_TIMEOUT);
-
- rtems_interrupt_disable(oldLevel);
- continue;
- }
-
- /* Got char from SW FIFO */
- count++;
-
- } while (count < rw_args->count );
-
- rtems_interrupt_enable(oldLevel);
-
- rw_args->bytes_moved = count;
-
- if (count == 0)
- return RTEMS_TIMEOUT; /* ETIMEDOUT should be EAGAIN/EWOULDBLOCK
*/
-
- return RTEMS_SUCCESSFUL;
-}
-
-static rtems_device_driver apbuart_write(rtems_device_major_number major,
rtems_device_minor_number minor, void *arg)
-{
- rtems_libio_rw_args_t *rw_args;
- unsigned int count, oldLevel, ctrl;
- char *buf;
- apbuart_priv *uart = &apbuarts[minor];
- int direct=0;
-
-
- rw_args = (rtems_libio_rw_args_t *) arg;
-
- FUNCDBG("apbuart_write\n");
-
- buf = rw_args->buffer;
-
- if ( rw_args->count < 1 || !buf )
- return RTEMS_INVALID_NAME; /* EINVAL */
-
- count = 0;
- rtems_interrupt_disable(oldLevel);
- /* Do we need to start to send first char direct via HW
- * to get IRQ going.
- */
-
- ctrl = READ_REG(&uart->regs->ctrl);
- if ( (ctrl & APBUART_CTRL_TF) == 0 ){
- /* TX interrupt is disabled ==>
- * SW FIFO is empty and,
- * HW FIFO empty
- */
- uart->regs->ctrl = ctrl | APBUART_CTRL_TF;
- if ( uart->ascii_mode && (buf[0] == '\n') ){
- uart->regs->data = '\r';
- }else{
- uart->regs->data = buf[0];
- count++;
- }
- uart->regs->ctrl = ctrl | APBUART_CTRL_TE | APBUART_CTRL_TF;
- direct = 1;
- }
-
- while( count < rw_args->count ) {
- /* write to HW FIFO direct skipping SW FIFO */
- if ( direct && ((READ_REG(&uart->regs->status) &
APBUART_STATUS_TF) == 0) ){
- uart->regs->data = buf[count];
- }
- /* write to SW FIFO */
- else if ( apbuart_fifo_put(uart->txfifo,buf[count]) ){
- direct = 0;
- DBG("APBUART[%d]: write: SW FIFO Full\n\r",minor);
-
- /* is full, block? */
- if ( ((count < 1) && uart->txblk) || uart->tx_flush ){
-
- rtems_interrupt_enable(oldLevel);
-
- rtems_semaphore_obtain(uart->tx_sem,
RTEMS_WAIT, RTEMS_NO_TIMEOUT);
-
- rtems_interrupt_disable(oldLevel);
-
- /* Do we need to start to send first char
direct via HW
- * to get IRQ going.
- */
-
- ctrl = READ_REG(&uart->regs->ctrl);
- if ( (ctrl & APBUART_CTRL_TF) == 0 ){
- /* TX interrupt is disabled ==>
- * SW FIFO is empty and,
- * HW FIFO empty
- */
- uart->regs->ctrl = ctrl |
APBUART_CTRL_TF;
- if ( uart->ascii_mode && (buf[count] ==
'\n') ){
- uart->regs->data = '\r';
- }else{
- uart->regs->data = buf[count];
- count++;
- }
- uart->regs->ctrl = ctrl |
APBUART_CTRL_TF | APBUART_CTRL_TE;
- direct = 1;
- }
-
- continue;
- }
- /* don't block, return current status */
- break;
- }else{
- direct = 0;
- }
-
- count++;
-
- }
-
- rtems_interrupt_enable(oldLevel);
-
- rw_args->bytes_moved = count;
-
- if (count == 0)
- return RTEMS_TIMEOUT; /* ETIMEDOUT should be EAGAIN/EWOULDBLOCK
*/
-
- return RTEMS_SUCCESSFUL;
-}
-
-static rtems_device_driver apbuart_control(rtems_device_major_number major,
rtems_device_minor_number minor, void *arg)
-{
- rtems_libio_ioctl_args_t *ioarg = (rtems_libio_ioctl_args_t *)arg;
- unsigned int *data = ioarg->buffer;
- apbuart_priv *uart = &apbuarts[minor];
- int size;
- unsigned int baudrate, blocking;
- apbuart_stats *stats;
-
- FUNCDBG("apbuart_control [%i,%i]\n",major, minor);
-
- if (!ioarg)
- return RTEMS_INVALID_NAME;
-
- ioarg->ioctl_return = 0;
- switch(ioarg->command) {
-
- /* Enable Receiver & transmitter */
- case APBUART_START:
- if ( uart->started )
- return RTEMS_INVALID_NAME;
- apbuart_hw_open(uart);
- uart->started = 1;
- break;
-
- /* Close Receiver & transmitter */
- case APBUART_STOP:
- if ( !uart->started )
- return RTEMS_INVALID_NAME;
- apbuart_hw_close(uart);
- uart->started = 0;
- break;
-
- /* Set RX FIFO Software buffer length
- * It is only possible to change buffer size in
- * non-running mode.
- */
- case APBUART_SET_RXFIFO_LEN:
- if ( uart->started )
- return RTEMS_RESOURCE_IN_USE; /* EBUSY */
-
- size = (int)ioarg->buffer;
- if ( size < 1 )
- return RTEMS_INVALID_NAME; /* EINVAL */
-
- /* Free old buffer */
- apbuart_fifo_free(uart->rxfifo);
-
- /* Allocate new buffer & init it */
- uart->rxfifo = apbuart_fifo_create(size);
- if ( !uart->rxfifo )
- return RTEMS_NO_MEMORY;
- break;
-
- /* Set TX FIFO Software buffer length
- * It is only possible to change buffer size
- * while in non-running mode.
- */
- case APBUART_SET_TXFIFO_LEN:
- if ( uart->started )
- return RTEMS_RESOURCE_IN_USE; /* EBUSY */
-
- size = (int)ioarg->buffer;
- if ( size < 1 )
- return RTEMS_INVALID_NAME; /* EINVAL */
-
- /* Free old buffer */
- apbuart_fifo_free(uart->txfifo);
-
- /* Allocate new buffer & init it */
- uart->txfifo = apbuart_fifo_create(size);
- if ( !uart->txfifo )
- return RTEMS_NO_MEMORY;
- break;
-
- case APBUART_SET_BAUDRATE:
- /* Set baud rate of */
- baudrate = (int)ioarg->buffer;
- if ( (baudrate < 1) || (baudrate > 115200) ){
- return RTEMS_INVALID_NAME;
- }
- uart->scaler = 0; /* use uart->baud */
- uart->baud = baudrate;
- break;
-
- case APBUART_SET_SCALER:
- /* use uart->scaler not uart->baud */
- uart->scaler = data[0];
- break;
-
- case APBUART_SET_BLOCKING:
- blocking = (unsigned int)ioarg->buffer;
- uart->rxblk = ( blocking & APBUART_BLK_RX );
- uart->txblk = ( blocking & APBUART_BLK_TX );
- uart->tx_flush = ( blocking & APBUART_BLK_FLUSH );
- break;
-
- case APBUART_GET_STATS:
- stats = (void *)ioarg->buffer;
- if ( !stats )
- return RTEMS_INVALID_NAME;
-
- /* Copy Stats */
- *stats = uart->stats;
- break;
-
- case APBUART_CLR_STATS:
- /* Clear/reset Stats */
- memset(&uart->stats,0,sizeof(uart->stats));
- break;
-
- case APBUART_SET_ASCII_MODE:
- uart->ascii_mode = (int)ioarg->buffer;
- break;
-
- default:
- return RTEMS_NOT_DEFINED;
- }
- return RTEMS_SUCCESSFUL;
-}
-
-
-/******************* APBUART FIFO implementation ***********************/
-
-static apbuart_fifo *apbuart_fifo_create(int size){
- apbuart_fifo *fifo;
- fifo = (apbuart_fifo *) malloc(size + sizeof(apbuart_fifo));
- if ( fifo ) {
- /* Init fifo */
- fifo->size = size;
- fifo->buf = (unsigned char *)(fifo+1);
- fifo->tail = fifo->buf;
- fifo->head = fifo->buf;
- fifo->max = &fifo->buf[size-1];
- fifo->full=0;
- }
- return fifo;
-}
-
-static void apbuart_fifo_free(apbuart_fifo *fifo){
- if ( fifo )
- free(fifo);
-}
-
-static inline int apbuart_fifo_isFull(apbuart_fifo *fifo){
- return fifo->full;
-}
-
-static inline int apbuart_fifo_isEmpty(apbuart_fifo *fifo){
- if ( (fifo->head == fifo->tail) && !fifo->full )
- return -1;
- return 0;
-}
-
-static int apbuart_fifo_put(apbuart_fifo *fifo, unsigned char c){
- if ( !fifo->full ){
- *fifo->head = c;
- fifo->head = (fifo->head >= fifo->max ) ? fifo->buf :
fifo->head+1;
- if ( fifo->head == fifo->tail )
- fifo->full = -1;
- return 0;
- }
- return -1;
-}
-
-static int apbuart_fifo_get(apbuart_fifo *fifo, unsigned char *c){
- if ( apbuart_fifo_isEmpty(fifo) )
- return -1;
- if ( c )
- *c = *fifo->tail;
- fifo->tail = (fifo->tail >= fifo->max ) ? fifo->buf : fifo->tail+1;
- fifo->full = 0;
- return 0;
-}
-
-static int inline apbuart_fifo_peek(apbuart_fifo *fifo, unsigned char **c){
- if ( apbuart_fifo_isEmpty(fifo) )
- return -1;
- if ( c )
- *c = fifo->tail;
- return 0;
-}
-
-static void inline apbuart_fifo_skip(apbuart_fifo *fifo){
- if ( !apbuart_fifo_isEmpty(fifo) ){
- fifo->tail = (fifo->tail >= fifo->max ) ? fifo->buf :
fifo->tail+1;
- fifo->full = 0;
- }
-}
--
2.7.4
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