* the GNU General Public License.
*
* Copyright 2003, 2004, 2006 Develer S.r.l. (http://www.develer.com/)
- * Copyright 2000 Bernardo Innocenti <bernie@codewiz.org>
- *
+ * Copyright 2000 Bernie Innocenti <bernie@codewiz.org>
* -->
*
* \brief Buffered serial I/O driver
* \li \c CONFIG_SER_TXTIMEOUT - Enable software serial transmission timeouts
*
*
- * \version $Id$
- * \author Bernardo Innocenti <bernie@develer.com>
+ * \author Bernie Innocenti <bernie@codewiz.org>
*/
#include "ser.h"
#include "wdt.h"
+#include "timer.h"
#include "ser_p.h"
#include "cfg/cfg_ser.h"
-#include "cfg/cfg_kern.h"
+#include "cfg/cfg_proc.h"
#include <cfg/debug.h>
#include <mware/formatwr.h>
-#include <string.h> /* memset */
+#include <cpu/power.h> /* cpu_relax() */
+
+#include <string.h> /* memset() */
/*
* Sanity check for config parameters required by this module.
*/
-#if !defined(CONFIG_KERNEL) || ((CONFIG_KERNEL != 0) && CONFIG_KERNEL != 1)
- #error CONFIG_KERNEL must be set to either 0 or 1 in config.h
+#if !defined(CONFIG_KERN) || ((CONFIG_KERN != 0) && CONFIG_KERN != 1)
+ #error CONFIG_KERN must be set to either 0 or 1 in cfg_kern.h
#endif
#if !defined(CONFIG_SER_RXTIMEOUT)
- #error CONFIG_SER_TXTIMEOUT missing in config.h
+ #error CONFIG_SER_TXTIMEOUT missing in cfg_ser.h
#endif
#if !defined(CONFIG_SER_RXTIMEOUT)
- #error CONFIG_SER_RXTIMEOUT missing in config.h
+ #error CONFIG_SER_RXTIMEOUT missing in cfg_ser.h
#endif
#if !defined(CONFIG_SER_DEFBAUDRATE)
- #error CONFIG_SER_DEFBAUDRATE missing in config.h
-#endif
-
-#if CONFIG_KERNEL
- #include <kern/proc.h>
-#endif
-
-#if CONFIG_SER_TXTIMEOUT != -1 || CONFIG_SER_RXTIMEOUT != -1
- #include <drv/timer.h>
+ #error CONFIG_SER_DEFBAUDRATE missing in cfg_ser.h
#endif
-struct Serial ser_handles[SER_CNT];
+struct Serial *ser_handles[SER_CNT];
/**
* Insert \a c in tx FIFO buffer.
/* Wait while buffer is full... */
do
{
- wdt_reset();
-#if CONFIG_KERNEL && CONFIG_KERN_SCHED
- /* Give up timeslice to other processes. */
- proc_switch();
-#endif
+ cpu_relax();
+
#if CONFIG_SER_TXTIMEOUT != -1
if (timer_clock() - start_time >= port->txtimeout)
{
ticks_t start_time = timer_clock();
#endif
+
/* Wait while buffer is empty */
do
{
- wdt_reset();
-#if CONFIG_KERNEL && CONFIG_KERN_SCHED
- /* Give up timeslice to other processes. */
- proc_switch();
-#endif
+ cpu_relax();
+
#if CONFIG_SER_RXTIMEOUT != -1
if (timer_clock() - start_time >= port->rxtimeout)
{
* EOF immediatly.
* \note Deprecated, use ser_getchar with rx_timeout set to 0.
*/
-int ser_getchar_nowait(struct KFileSerial *fd)
+int ser_getchar_nowait(struct Serial *fd)
{
- if (fifo_isempty_locked(&fd->ser->rxfifo))
+ if (fifo_isempty_locked(&fd->rxfifo))
return EOF;
/* NOTE: the double cast prevents unwanted sign extension */
- return (int)(unsigned char)fifo_pop_locked(&fd->ser->rxfifo);
+ return (int)(unsigned char)fifo_pop_locked(&fd->rxfifo);
}
*/
static size_t ser_read(struct KFile *fd, void *_buf, size_t size)
{
- KFileSerial *fds = KFILESERIAL(fd);
+ Serial *fds = SERIAL_CAST(fd);
size_t i = 0;
char *buf = (char *)_buf;
while (i < size)
{
- if ((c = ser_getchar(fds->ser)) == EOF)
+ if ((c = ser_getchar(fds)) == EOF)
break;
buf[i++] = c;
}
*/
static size_t ser_write(struct KFile *fd, const void *_buf, size_t size)
{
- KFileSerial *fds = KFILESERIAL(fd);
+ Serial *fds = SERIAL_CAST(fd);
const char *buf = (const char *)_buf;
size_t i = 0;
while (size--)
{
- if (ser_putchar(*buf++, fds->ser) == EOF)
+ if (ser_putchar(*buf++, fds) == EOF)
break;
i++;
}
#if CONFIG_SER_RXTIMEOUT != -1 || CONFIG_SER_TXTIMEOUT != -1
-void ser_settimeouts(struct KFileSerial *fd, mtime_t rxtimeout, mtime_t txtimeout)
+void ser_settimeouts(struct Serial *fd, mtime_t rxtimeout, mtime_t txtimeout)
{
- fd->ser->rxtimeout = ms_to_ticks(rxtimeout);
- fd->ser->txtimeout = ms_to_ticks(txtimeout);
+ #if CONFIG_SER_RXTIMEOUT != -1
+ fd->rxtimeout = ms_to_ticks(rxtimeout);
+ #else
+ (void)rxtimeout;
+ #endif
+
+ #if CONFIG_SER_TXTIMEOUT != -1
+ fd->txtimeout = ms_to_ticks(txtimeout);
+ #else
+ (void)txtimeout;
+ #endif
}
#endif /* CONFIG_SER_RXTIMEOUT || CONFIG_SER_TXTIMEOUT */
-#if CONFIG_SER_RXTIMEOUT != -1
+
/**
- * Discard input to resynchronize with remote end.
- *
- * Discard incoming data until the port stops receiving
- * characters for at least \a delay milliseconds.
- *
- * \note Serial errors are reset before and after executing the purge.
+ * Set the baudrate for the serial port
*/
-void ser_resync(struct KFileSerial *fd, mtime_t delay)
+void ser_setbaudrate(struct Serial *fd, unsigned long rate)
{
- mtime_t old_rxtimeout = ticks_to_ms(fd->ser->rxtimeout);
-
- ser_settimeouts(fd, delay, ticks_to_ms(fd->ser->txtimeout));
- do
- {
- ser_setstatus(fd->ser, 0);
- ser_getchar(fd->ser);
- }
- while (!(ser_getstatus(fd->ser) & SERRF_RXTIMEOUT));
-
- /* Restore port to an usable status */
- ser_setstatus(fd->ser, 0);
- ser_settimeouts(fd, old_rxtimeout, ticks_to_ms(fd->ser->txtimeout));
-}
-#endif /* CONFIG_SER_RXTIMEOUT */
-
-
-void ser_setbaudrate(struct KFileSerial *fd, unsigned long rate)
-{
- fd->ser->hw->table->setBaudrate(fd->ser->hw, rate);
+ fd->hw->table->setBaudrate(fd->hw, rate);
}
-void ser_setparity(struct KFileSerial *fd, int parity)
+/**
+ * Set the parity for the \a fd serial port
+ */
+void ser_setparity(struct Serial *fd, int parity)
{
- fd->ser->hw->table->setParity(fd->ser->hw, parity);
+ fd->hw->table->setParity(fd->hw, parity);
}
static int ser_error(struct KFile *fd)
{
- KFileSerial *fds = KFILESERIAL(fd);
- return ser_getstatus(fds->ser);
+ Serial *fds = SERIAL_CAST(fd);
+ return ser_getstatus(fds);
}
static void ser_clearerr(struct KFile *fd)
{
- KFileSerial *fds = KFILESERIAL(fd);
- ser_setstatus(fds->ser, 0);
+ Serial *fds = SERIAL_CAST(fd);
+ ser_setstatus(fds, 0);
}
/**
* Flush both the RX and TX buffers.
*/
-void ser_purge(struct KFileSerial *fd)
+void ser_purge(struct Serial *fd)
{
ser_purgeRx(fd);
ser_purgeTx(fd);
/**
* Flush RX buffer.
*/
-void ser_purgeRx(struct KFileSerial *fd)
+void ser_purgeRx(struct Serial *fd)
{
- fifo_flush_locked(&fd->ser->rxfifo);
+ fifo_flush_locked(&fd->rxfifo);
}
/**
* Flush TX buffer.
*/
-void ser_purgeTx(struct KFileSerial *fd)
+void ser_purgeTx(struct Serial *fd)
{
- fifo_flush_locked(&fd->ser->txfifo);
+ fifo_flush_locked(&fd->txfifo);
}
*/
static int ser_flush(struct KFile *fd)
{
- KFileSerial *fds = KFILESERIAL(fd);
+ Serial *fds = SERIAL_CAST(fd);
/*
* Wait until the FIFO becomes empty, and then until the byte currently in
* the hardware register gets shifted out.
*/
- while (!fifo_isempty(&fds->ser->txfifo)
- || fds->ser->hw->table->txSending(fds->ser->hw))
- {
- #if CONFIG_KERNEL && CONFIG_KERN_SCHED
- /* Give up timeslice to other processes. */
- proc_switch();
- #endif
- wdt_reset();
- }
+ while (!fifo_isempty(&fds->txfifo)
+ || fds->hw->table->txSending(fds->hw))
+ cpu_relax();
return 0;
}
* \param fd KFile Serial struct interface.
* \param unit Serial unit to open. Possible values are architecture dependant.
*/
-static struct Serial *ser_open(struct KFileSerial *fd, unsigned int unit)
+static struct Serial *ser_open(struct Serial *fd, unsigned int unit)
{
- struct Serial *port;
-
ASSERT(unit < countof(ser_handles));
- port = &ser_handles[unit];
- ASSERT(!port->is_open);
- DB(port->is_open = true);
+ ser_handles[unit] = fd;
+ ASSERT(!fd->is_open);
+ DB(fd->is_open = true);
- port->unit = unit;
+ fd->unit = unit;
- port->hw = ser_hw_getdesc(unit);
+ fd->hw = ser_hw_getdesc(unit);
/* Initialize circular buffers */
- ASSERT(port->hw->txbuffer);
- ASSERT(port->hw->rxbuffer);
- fifo_init(&port->txfifo, port->hw->txbuffer, port->hw->txbuffer_size);
- fifo_init(&port->rxfifo, port->hw->rxbuffer, port->hw->rxbuffer_size);
+ ASSERT(fd->hw->txbuffer);
+ ASSERT(fd->hw->rxbuffer);
+ fifo_init(&fd->txfifo, fd->hw->txbuffer, fd->hw->txbuffer_size);
+ fifo_init(&fd->rxfifo, fd->hw->rxbuffer, fd->hw->rxbuffer_size);
- port->hw->table->init(port->hw, port);
+ fd->hw->table->init(fd->hw, fd);
- fd->ser = port;
/* Set default values */
#if CONFIG_SER_RXTIMEOUT != -1 || CONFIG_SER_TXTIMEOUT != -1
ser_settimeouts(fd, CONFIG_SER_RXTIMEOUT, CONFIG_SER_TXTIMEOUT);
#endif
/* Clear error flags */
- ser_setstatus(port, 0);
+ ser_setstatus(fd, 0);
- return port;
+ return fd;
}
*/
static int ser_close(struct KFile *fd)
{
- KFileSerial *fds = KFILESERIAL(fd);
- Serial *port = fds->ser;
+ Serial *fds = SERIAL_CAST(fd);
+ Serial *port = fds;
ASSERT(port->is_open);
DB(port->is_open = false);
*/
static struct KFile *ser_reopen(struct KFile *fd)
{
- KFileSerial *fds = KFILESERIAL(fd);
+ Serial *fds = SERIAL_CAST(fd);
ser_close(fd);
- ser_open(fds, fds->ser->unit);
+ ser_open(fds, fds->unit);
return (KFile *)fds;
}
/**
* Init serial driver for \a unit.
+ *
+ * Use values SER_UARTn as values for \a unit.
*/
-void ser_init(struct KFileSerial *fds, unsigned int unit)
+void ser_init(struct Serial *fds, unsigned int unit)
{
memset(fds, 0, sizeof(*fds));
*/
static size_t spimaster_read(struct KFile *fd, void *_buf, size_t size)
{
- KFileSerial *fd_spi = KFILESERIAL(fd);
+ Serial *fd_spi = SERIAL_CAST(fd);
ser_flush(&fd_spi->fd);
ser_purgeRx(fd_spi);
* Send and receive chars 1 by 1, otherwise the rxfifo
* will overrun.
*/
- ser_putchar(0, fd_spi->ser);
+ ser_putchar(0, fd_spi);
- if ((c = ser_getchar(fd_spi->ser)) == EOF)
+ if ((c = ser_getchar(fd_spi)) == EOF)
break;
*buf++ = c;
*/
static size_t spimaster_write(struct KFile *fd, const void *buf, size_t size)
{
- KFileSerial *fd_spi = KFILESERIAL(fd);
+ Serial *fd_spi = SERIAL_CAST(fd);
ser_purgeRx(fd_spi);
/**
* Init SPI serial driver \a unit in master mode.
*
+ * Use SER_SPIn for \a unit parameter.
+ *
* This interface implements the SPI master protocol over a serial SPI
* driver. This is needed because normal serial driver send/receive data
* at the same time. SPI slaves like memories and other peripherals
* we have to discard all incoming data. Then, when we want to
* receive, we must write fake data to SPI to trigger slave devices.
*/
-void spimaster_init(KFileSerial *fds, unsigned int unit)
+void spimaster_init(Serial *fds, unsigned int unit)
{
ser_init(fds, unit);
fds->fd.read = spimaster_read;
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