mirror of
https://github.com/freebsd/freebsd-src
synced 2024-09-29 21:26:51 +00:00
Implemented sending of BREAKs. This is quite complicated because the
hardware is interrupt-driven to a fault and sending a BREAK requires mode switching. Always running in the BREAK-capable mode as in PR 8318 would double the overhead for sending \0's. Reminded by: PR 8318
This commit is contained in:
Bruce Evans
parent
70efdda93d
commit
657365cdd7
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=41903
179
sys/dev/cy/cy.c
179
sys/dev/cy/cy.c
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@ -27,7 +27,7 @@
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* $Id: cy.c,v 1.75 1998/11/28 13:18:16 bde Exp $
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* $Id: cy.c,v 1.76 1998/11/28 15:48:09 bde Exp $
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*/
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#include "opt_compat.h"
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@ -37,7 +37,6 @@
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/*
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* TODO:
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* Implement BREAK.
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* Fix overflows when closing line.
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* Atomic COR change.
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* Consoles.
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@ -152,6 +151,16 @@
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#define CD1400_xIVR_CHAN_SHIFT 3
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#define CD1400_xIVR_CHAN 0x1F
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/*
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* ETC states. com->etc may also contain a hardware ETC command value,
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* meaning that execution of that command is pending.
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*/
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#define ETC_NONE 0 /* we depend on bzero() setting this */
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#define ETC_BREAK_STARTING 1
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#define ETC_BREAK_STARTED 2
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#define ETC_BREAK_ENDING 3
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#define ETC_BREAK_ENDED 4
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#define LOTS_OF_EVENTS 64 /* helps separate urgent events from input */
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#define RS_IBUFSIZE 256
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@ -233,6 +242,7 @@ struct com_s {
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#if 0
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u_char cfcr_image; /* copy of value written to CFCR */
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#endif
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u_char etc; /* pending Embedded Transmit Command */
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u_char extra_state; /* more flag bits, separate for order trick */
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#if 0
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u_char fifo_image; /* copy of value written to FIFO */
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@ -345,6 +355,7 @@ ointhand2_t siointr;
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static int cy_units __P((cy_addr cy_iobase, int cy_align));
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static int sioattach __P((struct isa_device *dev));
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static void cd1400_channel_cmd __P((struct com_s *com, int cmd));
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static void cd_etc __P((struct com_s *com, int etc));
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static int cd_getreg __P((struct com_s *com, int reg));
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static void cd_setreg __P((struct com_s *com, int reg, int val));
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static timeout_t siodtrwakeup;
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@ -871,6 +882,7 @@ sioclose(dev, flag, mode, p)
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com = com_addr(MINOR_TO_UNIT(mynor));
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tp = com->tp;
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s = spltty();
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cd_etc(com, CD1400_ETC_STOPBREAK);
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(*linesw[tp->t_line].l_close)(tp, flag);
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disc_optim(tp, &tp->t_termios, com);
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siostop(tp, FREAD | FWRITE);
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@ -904,6 +916,13 @@ comhardclose(com)
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com->do_timestamp = 0;
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#if 0
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outb(iobase + com_cfcr, com->cfcr_image &= ~CFCR_SBREAK);
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#else
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/* XXX */
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disable_intr();
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com->etc = ETC_NONE;
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cd_setreg(com, CD1400_COR2, com->cor[1] &= ~CD1400_COR2_ETC);
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enable_intr();
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cd1400_channel_cmd(com, CD1400_CCR_CMDRESET | CD1400_CCR_FTF);
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#endif
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{
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@ -1339,6 +1358,77 @@ siointr(unit)
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& CD1400_xIVR_CHAN));
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#endif
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if (com->etc != ETC_NONE) {
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if (com->intr_enable & CD1400_SRER_TXRDY) {
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/*
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* Here due to sloppy SRER_TXRDY
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* enabling. Ignore. Come back when
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* tx is empty.
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*/
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cd_outb(iobase, CD1400_SRER, cy_align,
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com->intr_enable
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= com->intr_enable
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& ~CD1400_SRER_TXRDY
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| CD1400_SRER_TXMPTY);
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goto terminate_tx_service;
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}
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switch (com->etc) {
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case CD1400_ETC_SENDBREAK:
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case CD1400_ETC_STOPBREAK:
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/*
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* Start the command. Come back on
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* next tx empty interrupt, hopefully
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* after command has been executed.
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*/
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cd_outb(iobase, CD1400_COR2, cy_align,
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com->cor[1] |= CD1400_COR2_ETC);
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cd_outb(iobase, CD1400_TDR, cy_align,
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CD1400_ETC_CMD);
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cd_outb(iobase, CD1400_TDR, cy_align,
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com->etc);
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if (com->etc == CD1400_ETC_SENDBREAK)
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com->etc = ETC_BREAK_STARTING;
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else
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com->etc = ETC_BREAK_ENDING;
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goto terminate_tx_service;
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case ETC_BREAK_STARTING:
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/*
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* BREAK is now on. Continue with
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* SRER_TXMPTY processing, hopefully
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* don't come back.
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*/
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com->etc = ETC_BREAK_STARTED;
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break;
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case ETC_BREAK_STARTED:
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/*
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* Came back due to sloppy SRER_TXMPTY
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* enabling. Hope again.
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*/
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break;
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case ETC_BREAK_ENDING:
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/*
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* BREAK is now off. Continue with
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* SRER_TXMPTY processing and don't
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* come back. The SWI handler will
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* restart tx interrupts if necessary.
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*/
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cd_outb(iobase, CD1400_COR2, cy_align,
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com->cor[1]
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&= ~CD1400_COR2_ETC);
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com->etc = ETC_BREAK_ENDED;
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if (!(com->state & CS_ODONE)) {
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com_events += LOTS_OF_EVENTS;
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com->state |= CS_ODONE;
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setsofttty();
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}
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break;
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case ETC_BREAK_ENDED:
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/*
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* Shouldn't get here. Hope again.
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*/
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break;
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}
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}
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if (com->intr_enable & CD1400_SRER_TXMPTY) {
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if (!(com->extra_state & CSE_ODONE)) {
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com_events += LOTS_OF_EVENTS;
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@ -1530,14 +1620,20 @@ sioioctl(dev, cmd, data, flag, p)
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return (error);
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}
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switch (cmd) {
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#if 0
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case TIOCSBRK:
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#if 0
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outb(iobase + com_cfcr, com->cfcr_image |= CFCR_SBREAK);
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#else
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cd_etc(com, CD1400_ETC_SENDBREAK);
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#endif
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break;
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case TIOCCBRK:
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#if 0
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outb(iobase + com_cfcr, com->cfcr_image &= ~CFCR_SBREAK);
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#else
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cd_etc(com, CD1400_ETC_STOPBREAK);
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#endif
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break;
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#endif /* 0 */
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case TIOCSDTR:
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(void)commctl(com, TIOCM_DTR, DMBIS);
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break;
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@ -1682,13 +1778,6 @@ siopoll()
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(*linesw[tp->t_line].l_modem)
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(tp, com->prev_modem_status & MSR_DCD);
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}
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if (com->state & CS_ODONE) {
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disable_intr();
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com_events -= LOTS_OF_EVENTS;
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com->state &= ~CS_ODONE;
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enable_intr();
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(*linesw[tp->t_line].l_start)(tp);
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}
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if (com->extra_state & CSE_ODONE) {
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disable_intr();
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com_events -= LOTS_OF_EVENTS;
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@ -1698,6 +1787,18 @@ siopoll()
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tp->t_state &= ~TS_BUSY;
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ttwwakeup(com->tp);
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}
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if (com->etc != ETC_NONE) {
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if (com->etc == ETC_BREAK_ENDED)
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com->etc = ETC_NONE;
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wakeup(&com->etc);
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}
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}
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if (com->state & CS_ODONE) {
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disable_intr();
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com_events -= LOTS_OF_EVENTS;
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com->state &= ~CS_ODONE;
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enable_intr();
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(*linesw[tp->t_line].l_start)(tp);
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}
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if (incc <= 0 || !(tp->t_state & TS_ISOPEN))
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continue;
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@ -2257,26 +2358,35 @@ siostop(tp, rw)
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int rw;
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{
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struct com_s *com;
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bool_t wakeup_etc;
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com = com_addr(DEV_TO_UNIT(tp->t_dev));
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wakeup_etc = FALSE;
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disable_intr();
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if (rw & FWRITE) {
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com->obufs[0].l_queued = FALSE;
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com->obufs[1].l_queued = FALSE;
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if (com->state & CS_ODONE)
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com_events -= LOTS_OF_EVENTS;
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com->state &= ~(CS_ODONE | CS_BUSY);
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if (com->extra_state & CSE_ODONE) {
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com_events -= LOTS_OF_EVENTS;
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com->extra_state &= ~CSE_ODONE;
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if (com->etc != ETC_NONE) {
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if (com->etc == ETC_BREAK_ENDED)
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com->etc = ETC_NONE;
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wakeup_etc = TRUE;
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}
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}
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com->tp->t_state &= ~TS_BUSY;
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if (com->state & CS_ODONE)
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com_events -= LOTS_OF_EVENTS;
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com->state &= ~(CS_ODONE | CS_BUSY);
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}
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if (rw & FREAD) {
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com_events -= (com->iptr - com->ibuf);
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com->iptr = com->ibuf;
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}
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enable_intr();
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if (wakeup_etc)
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wakeup(&com->etc);
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comstart(tp);
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/* XXX should clear h/w fifos too. */
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@ -2583,6 +2693,47 @@ cd1400_channel_cmd(com, cmd)
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cd_setreg(com, CD1400_CCR, cmd);
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}
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static void
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cd_etc(com, etc)
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struct com_s *com;
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int etc;
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{
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/*
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* We can't change the hardware's ETC state while there are any
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* characters in the tx fifo, since those characters would be
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* interpreted as commands! Unputting characters from the fifo
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* is difficult, so we wait up to 12 character times for the fifo
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* to drain. The command will be delayed for up to 2 character
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* times for the tx to become empty. Unputting characters from
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* the tx holding and shift registers is impossible, so we wait
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* for the tx to become empty so that the command is sure to be
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* executed soon after we issue it.
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*/
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disable_intr();
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if (com->etc == etc) {
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enable_intr();
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goto wait;
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}
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if (etc == CD1400_ETC_SENDBREAK
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&& (com->etc == ETC_BREAK_STARTING
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|| com->etc == ETC_BREAK_STARTED)
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|| etc == CD1400_ETC_STOPBREAK
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&& (com->etc == ETC_BREAK_ENDING || com->etc == ETC_BREAK_ENDED
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|| com->etc == ETC_NONE)) {
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enable_intr();
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return;
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}
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com->etc = etc;
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cd_setreg(com, CD1400_SRER,
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com->intr_enable
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= com->intr_enable & ~CD1400_SRER_TXRDY | CD1400_SRER_TXMPTY);
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enable_intr();
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wait:
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while (com->etc == etc
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&& tsleep(&com->etc, TTIPRI | PCATCH, "cyetc", 0) == 0)
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continue;
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}
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|
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static int
|
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cd_getreg(com, reg)
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struct com_s *com;
|
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|
|
|
|||
|
|
@ -27,7 +27,7 @@
|
|||
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
|
||||
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
||||
*
|
||||
* $Id: cy.c,v 1.75 1998/11/28 13:18:16 bde Exp $
|
||||
* $Id: cy.c,v 1.76 1998/11/28 15:48:09 bde Exp $
|
||||
*/
|
||||
|
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#include "opt_compat.h"
|
||||
|
|
@ -37,7 +37,6 @@
|
|||
|
||||
/*
|
||||
* TODO:
|
||||
* Implement BREAK.
|
||||
* Fix overflows when closing line.
|
||||
* Atomic COR change.
|
||||
* Consoles.
|
||||
|
|
@ -152,6 +151,16 @@
|
|||
#define CD1400_xIVR_CHAN_SHIFT 3
|
||||
#define CD1400_xIVR_CHAN 0x1F
|
||||
|
||||
/*
|
||||
* ETC states. com->etc may also contain a hardware ETC command value,
|
||||
* meaning that execution of that command is pending.
|
||||
*/
|
||||
#define ETC_NONE 0 /* we depend on bzero() setting this */
|
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#define ETC_BREAK_STARTING 1
|
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#define ETC_BREAK_STARTED 2
|
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#define ETC_BREAK_ENDING 3
|
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#define ETC_BREAK_ENDED 4
|
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|
||||
#define LOTS_OF_EVENTS 64 /* helps separate urgent events from input */
|
||||
#define RS_IBUFSIZE 256
|
||||
|
||||
|
|
@ -233,6 +242,7 @@ struct com_s {
|
|||
#if 0
|
||||
u_char cfcr_image; /* copy of value written to CFCR */
|
||||
#endif
|
||||
u_char etc; /* pending Embedded Transmit Command */
|
||||
u_char extra_state; /* more flag bits, separate for order trick */
|
||||
#if 0
|
||||
u_char fifo_image; /* copy of value written to FIFO */
|
||||
|
|
@ -345,6 +355,7 @@ ointhand2_t siointr;
|
|||
static int cy_units __P((cy_addr cy_iobase, int cy_align));
|
||||
static int sioattach __P((struct isa_device *dev));
|
||||
static void cd1400_channel_cmd __P((struct com_s *com, int cmd));
|
||||
static void cd_etc __P((struct com_s *com, int etc));
|
||||
static int cd_getreg __P((struct com_s *com, int reg));
|
||||
static void cd_setreg __P((struct com_s *com, int reg, int val));
|
||||
static timeout_t siodtrwakeup;
|
||||
|
|
@ -871,6 +882,7 @@ sioclose(dev, flag, mode, p)
|
|||
com = com_addr(MINOR_TO_UNIT(mynor));
|
||||
tp = com->tp;
|
||||
s = spltty();
|
||||
cd_etc(com, CD1400_ETC_STOPBREAK);
|
||||
(*linesw[tp->t_line].l_close)(tp, flag);
|
||||
disc_optim(tp, &tp->t_termios, com);
|
||||
siostop(tp, FREAD | FWRITE);
|
||||
|
|
@ -904,6 +916,13 @@ comhardclose(com)
|
|||
com->do_timestamp = 0;
|
||||
#if 0
|
||||
outb(iobase + com_cfcr, com->cfcr_image &= ~CFCR_SBREAK);
|
||||
#else
|
||||
/* XXX */
|
||||
disable_intr();
|
||||
com->etc = ETC_NONE;
|
||||
cd_setreg(com, CD1400_COR2, com->cor[1] &= ~CD1400_COR2_ETC);
|
||||
enable_intr();
|
||||
cd1400_channel_cmd(com, CD1400_CCR_CMDRESET | CD1400_CCR_FTF);
|
||||
#endif
|
||||
|
||||
{
|
||||
|
|
@ -1339,6 +1358,77 @@ siointr(unit)
|
|||
& CD1400_xIVR_CHAN));
|
||||
#endif
|
||||
|
||||
if (com->etc != ETC_NONE) {
|
||||
if (com->intr_enable & CD1400_SRER_TXRDY) {
|
||||
/*
|
||||
* Here due to sloppy SRER_TXRDY
|
||||
* enabling. Ignore. Come back when
|
||||
* tx is empty.
|
||||
*/
|
||||
cd_outb(iobase, CD1400_SRER, cy_align,
|
||||
com->intr_enable
|
||||
= com->intr_enable
|
||||
& ~CD1400_SRER_TXRDY
|
||||
| CD1400_SRER_TXMPTY);
|
||||
goto terminate_tx_service;
|
||||
}
|
||||
switch (com->etc) {
|
||||
case CD1400_ETC_SENDBREAK:
|
||||
case CD1400_ETC_STOPBREAK:
|
||||
/*
|
||||
* Start the command. Come back on
|
||||
* next tx empty interrupt, hopefully
|
||||
* after command has been executed.
|
||||
*/
|
||||
cd_outb(iobase, CD1400_COR2, cy_align,
|
||||
com->cor[1] |= CD1400_COR2_ETC);
|
||||
cd_outb(iobase, CD1400_TDR, cy_align,
|
||||
CD1400_ETC_CMD);
|
||||
cd_outb(iobase, CD1400_TDR, cy_align,
|
||||
com->etc);
|
||||
if (com->etc == CD1400_ETC_SENDBREAK)
|
||||
com->etc = ETC_BREAK_STARTING;
|
||||
else
|
||||
com->etc = ETC_BREAK_ENDING;
|
||||
goto terminate_tx_service;
|
||||
case ETC_BREAK_STARTING:
|
||||
/*
|
||||
* BREAK is now on. Continue with
|
||||
* SRER_TXMPTY processing, hopefully
|
||||
* don't come back.
|
||||
*/
|
||||
com->etc = ETC_BREAK_STARTED;
|
||||
break;
|
||||
case ETC_BREAK_STARTED:
|
||||
/*
|
||||
* Came back due to sloppy SRER_TXMPTY
|
||||
* enabling. Hope again.
|
||||
*/
|
||||
break;
|
||||
case ETC_BREAK_ENDING:
|
||||
/*
|
||||
* BREAK is now off. Continue with
|
||||
* SRER_TXMPTY processing and don't
|
||||
* come back. The SWI handler will
|
||||
* restart tx interrupts if necessary.
|
||||
*/
|
||||
cd_outb(iobase, CD1400_COR2, cy_align,
|
||||
com->cor[1]
|
||||
&= ~CD1400_COR2_ETC);
|
||||
com->etc = ETC_BREAK_ENDED;
|
||||
if (!(com->state & CS_ODONE)) {
|
||||
com_events += LOTS_OF_EVENTS;
|
||||
com->state |= CS_ODONE;
|
||||
setsofttty();
|
||||
}
|
||||
break;
|
||||
case ETC_BREAK_ENDED:
|
||||
/*
|
||||
* Shouldn't get here. Hope again.
|
||||
*/
|
||||
break;
|
||||
}
|
||||
}
|
||||
if (com->intr_enable & CD1400_SRER_TXMPTY) {
|
||||
if (!(com->extra_state & CSE_ODONE)) {
|
||||
com_events += LOTS_OF_EVENTS;
|
||||
|
|
@ -1530,14 +1620,20 @@ sioioctl(dev, cmd, data, flag, p)
|
|||
return (error);
|
||||
}
|
||||
switch (cmd) {
|
||||
#if 0
|
||||
case TIOCSBRK:
|
||||
#if 0
|
||||
outb(iobase + com_cfcr, com->cfcr_image |= CFCR_SBREAK);
|
||||
#else
|
||||
cd_etc(com, CD1400_ETC_SENDBREAK);
|
||||
#endif
|
||||
break;
|
||||
case TIOCCBRK:
|
||||
#if 0
|
||||
outb(iobase + com_cfcr, com->cfcr_image &= ~CFCR_SBREAK);
|
||||
#else
|
||||
cd_etc(com, CD1400_ETC_STOPBREAK);
|
||||
#endif
|
||||
break;
|
||||
#endif /* 0 */
|
||||
case TIOCSDTR:
|
||||
(void)commctl(com, TIOCM_DTR, DMBIS);
|
||||
break;
|
||||
|
|
@ -1682,13 +1778,6 @@ siopoll()
|
|||
(*linesw[tp->t_line].l_modem)
|
||||
(tp, com->prev_modem_status & MSR_DCD);
|
||||
}
|
||||
if (com->state & CS_ODONE) {
|
||||
disable_intr();
|
||||
com_events -= LOTS_OF_EVENTS;
|
||||
com->state &= ~CS_ODONE;
|
||||
enable_intr();
|
||||
(*linesw[tp->t_line].l_start)(tp);
|
||||
}
|
||||
if (com->extra_state & CSE_ODONE) {
|
||||
disable_intr();
|
||||
com_events -= LOTS_OF_EVENTS;
|
||||
|
|
@ -1698,6 +1787,18 @@ siopoll()
|
|||
tp->t_state &= ~TS_BUSY;
|
||||
ttwwakeup(com->tp);
|
||||
}
|
||||
if (com->etc != ETC_NONE) {
|
||||
if (com->etc == ETC_BREAK_ENDED)
|
||||
com->etc = ETC_NONE;
|
||||
wakeup(&com->etc);
|
||||
}
|
||||
}
|
||||
if (com->state & CS_ODONE) {
|
||||
disable_intr();
|
||||
com_events -= LOTS_OF_EVENTS;
|
||||
com->state &= ~CS_ODONE;
|
||||
enable_intr();
|
||||
(*linesw[tp->t_line].l_start)(tp);
|
||||
}
|
||||
if (incc <= 0 || !(tp->t_state & TS_ISOPEN))
|
||||
continue;
|
||||
|
|
@ -2257,26 +2358,35 @@ siostop(tp, rw)
|
|||
int rw;
|
||||
{
|
||||
struct com_s *com;
|
||||
bool_t wakeup_etc;
|
||||
|
||||
com = com_addr(DEV_TO_UNIT(tp->t_dev));
|
||||
wakeup_etc = FALSE;
|
||||
disable_intr();
|
||||
if (rw & FWRITE) {
|
||||
com->obufs[0].l_queued = FALSE;
|
||||
com->obufs[1].l_queued = FALSE;
|
||||
if (com->state & CS_ODONE)
|
||||
com_events -= LOTS_OF_EVENTS;
|
||||
com->state &= ~(CS_ODONE | CS_BUSY);
|
||||
if (com->extra_state & CSE_ODONE) {
|
||||
com_events -= LOTS_OF_EVENTS;
|
||||
com->extra_state &= ~CSE_ODONE;
|
||||
if (com->etc != ETC_NONE) {
|
||||
if (com->etc == ETC_BREAK_ENDED)
|
||||
com->etc = ETC_NONE;
|
||||
wakeup_etc = TRUE;
|
||||
}
|
||||
}
|
||||
com->tp->t_state &= ~TS_BUSY;
|
||||
if (com->state & CS_ODONE)
|
||||
com_events -= LOTS_OF_EVENTS;
|
||||
com->state &= ~(CS_ODONE | CS_BUSY);
|
||||
}
|
||||
if (rw & FREAD) {
|
||||
com_events -= (com->iptr - com->ibuf);
|
||||
com->iptr = com->ibuf;
|
||||
}
|
||||
enable_intr();
|
||||
if (wakeup_etc)
|
||||
wakeup(&com->etc);
|
||||
comstart(tp);
|
||||
|
||||
/* XXX should clear h/w fifos too. */
|
||||
|
|
@ -2583,6 +2693,47 @@ cd1400_channel_cmd(com, cmd)
|
|||
cd_setreg(com, CD1400_CCR, cmd);
|
||||
}
|
||||
|
||||
static void
|
||||
cd_etc(com, etc)
|
||||
struct com_s *com;
|
||||
int etc;
|
||||
{
|
||||
/*
|
||||
* We can't change the hardware's ETC state while there are any
|
||||
* characters in the tx fifo, since those characters would be
|
||||
* interpreted as commands! Unputting characters from the fifo
|
||||
* is difficult, so we wait up to 12 character times for the fifo
|
||||
* to drain. The command will be delayed for up to 2 character
|
||||
* times for the tx to become empty. Unputting characters from
|
||||
* the tx holding and shift registers is impossible, so we wait
|
||||
* for the tx to become empty so that the command is sure to be
|
||||
* executed soon after we issue it.
|
||||
*/
|
||||
disable_intr();
|
||||
if (com->etc == etc) {
|
||||
enable_intr();
|
||||
goto wait;
|
||||
}
|
||||
if (etc == CD1400_ETC_SENDBREAK
|
||||
&& (com->etc == ETC_BREAK_STARTING
|
||||
|| com->etc == ETC_BREAK_STARTED)
|
||||
|| etc == CD1400_ETC_STOPBREAK
|
||||
&& (com->etc == ETC_BREAK_ENDING || com->etc == ETC_BREAK_ENDED
|
||||
|| com->etc == ETC_NONE)) {
|
||||
enable_intr();
|
||||
return;
|
||||
}
|
||||
com->etc = etc;
|
||||
cd_setreg(com, CD1400_SRER,
|
||||
com->intr_enable
|
||||
= com->intr_enable & ~CD1400_SRER_TXRDY | CD1400_SRER_TXMPTY);
|
||||
enable_intr();
|
||||
wait:
|
||||
while (com->etc == etc
|
||||
&& tsleep(&com->etc, TTIPRI | PCATCH, "cyetc", 0) == 0)
|
||||
continue;
|
||||
}
|
||||
|
||||
static int
|
||||
cd_getreg(com, reg)
|
||||
struct com_s *com;
|
||||
|
|
|
|||
|
|
@ -27,7 +27,7 @@
|
|||
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
|
||||
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
||||
*
|
||||
* $Id$
|
||||
* $Id: cd1400.h,v 1.4 1997/02/22 09:37:59 peter Exp $
|
||||
*/
|
||||
|
||||
/*
|
||||
|
|
@ -99,6 +99,7 @@
|
|||
#define CD1400_CCR_CMDRESET (1<<7) /* enables following: */
|
||||
#define CD1400_CCR_FTF (1<<1) /* flush tx fifo */
|
||||
#define CD1400_CCR_FULLRESET (1<<0) /* full reset */
|
||||
#define CD1400_CCR_CHANRESET 0 /* current channel */
|
||||
#define CD1400_CCR_CMDCORCHG (1<<6) /* enables following: */
|
||||
#define CD1400_CCR_COR3 (1<<3) /* COR3 changed */
|
||||
#define CD1400_CCR_COR2 (1<<2) /* COR2 changed */
|
||||
|
|
@ -133,6 +134,10 @@
|
|||
#define CD1400_COR2_IXANY (1<<7) /* implied XON mode */
|
||||
#define CD1400_COR2_IXOFF (1<<6) /* in-band tx flow control */
|
||||
#define CD1400_COR2_ETC (1<<5) /* embedded tx command */
|
||||
#define CD1400_ETC_CMD 0x00 /* start an ETC */
|
||||
#define CD1400_ETC_SENDBREAK 0x81
|
||||
#define CD1400_ETC_INSERTDELAY 0x82
|
||||
#define CD1400_ETC_STOPBREAK 0x83
|
||||
#define CD1400_COR2_LLM (1<<4) /* local loopback mode */
|
||||
#define CD1400_COR2_RLM (1<<3) /* remote loopback mode */
|
||||
#define CD1400_COR2_RTSAO (1<<2) /* RTS auto output */
|
||||
|
|
|
|||
|
|
@ -27,7 +27,7 @@
|
|||
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
|
||||
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
||||
*
|
||||
* $Id: cy.c,v 1.75 1998/11/28 13:18:16 bde Exp $
|
||||
* $Id: cy.c,v 1.76 1998/11/28 15:48:09 bde Exp $
|
||||
*/
|
||||
|
||||
#include "opt_compat.h"
|
||||
|
|
@ -37,7 +37,6 @@
|
|||
|
||||
/*
|
||||
* TODO:
|
||||
* Implement BREAK.
|
||||
* Fix overflows when closing line.
|
||||
* Atomic COR change.
|
||||
* Consoles.
|
||||
|
|
@ -152,6 +151,16 @@
|
|||
#define CD1400_xIVR_CHAN_SHIFT 3
|
||||
#define CD1400_xIVR_CHAN 0x1F
|
||||
|
||||
/*
|
||||
* ETC states. com->etc may also contain a hardware ETC command value,
|
||||
* meaning that execution of that command is pending.
|
||||
*/
|
||||
#define ETC_NONE 0 /* we depend on bzero() setting this */
|
||||
#define ETC_BREAK_STARTING 1
|
||||
#define ETC_BREAK_STARTED 2
|
||||
#define ETC_BREAK_ENDING 3
|
||||
#define ETC_BREAK_ENDED 4
|
||||
|
||||
#define LOTS_OF_EVENTS 64 /* helps separate urgent events from input */
|
||||
#define RS_IBUFSIZE 256
|
||||
|
||||
|
|
@ -233,6 +242,7 @@ struct com_s {
|
|||
#if 0
|
||||
u_char cfcr_image; /* copy of value written to CFCR */
|
||||
#endif
|
||||
u_char etc; /* pending Embedded Transmit Command */
|
||||
u_char extra_state; /* more flag bits, separate for order trick */
|
||||
#if 0
|
||||
u_char fifo_image; /* copy of value written to FIFO */
|
||||
|
|
@ -345,6 +355,7 @@ ointhand2_t siointr;
|
|||
static int cy_units __P((cy_addr cy_iobase, int cy_align));
|
||||
static int sioattach __P((struct isa_device *dev));
|
||||
static void cd1400_channel_cmd __P((struct com_s *com, int cmd));
|
||||
static void cd_etc __P((struct com_s *com, int etc));
|
||||
static int cd_getreg __P((struct com_s *com, int reg));
|
||||
static void cd_setreg __P((struct com_s *com, int reg, int val));
|
||||
static timeout_t siodtrwakeup;
|
||||
|
|
@ -871,6 +882,7 @@ sioclose(dev, flag, mode, p)
|
|||
com = com_addr(MINOR_TO_UNIT(mynor));
|
||||
tp = com->tp;
|
||||
s = spltty();
|
||||
cd_etc(com, CD1400_ETC_STOPBREAK);
|
||||
(*linesw[tp->t_line].l_close)(tp, flag);
|
||||
disc_optim(tp, &tp->t_termios, com);
|
||||
siostop(tp, FREAD | FWRITE);
|
||||
|
|
@ -904,6 +916,13 @@ comhardclose(com)
|
|||
com->do_timestamp = 0;
|
||||
#if 0
|
||||
outb(iobase + com_cfcr, com->cfcr_image &= ~CFCR_SBREAK);
|
||||
#else
|
||||
/* XXX */
|
||||
disable_intr();
|
||||
com->etc = ETC_NONE;
|
||||
cd_setreg(com, CD1400_COR2, com->cor[1] &= ~CD1400_COR2_ETC);
|
||||
enable_intr();
|
||||
cd1400_channel_cmd(com, CD1400_CCR_CMDRESET | CD1400_CCR_FTF);
|
||||
#endif
|
||||
|
||||
{
|
||||
|
|
@ -1339,6 +1358,77 @@ siointr(unit)
|
|||
& CD1400_xIVR_CHAN));
|
||||
#endif
|
||||
|
||||
if (com->etc != ETC_NONE) {
|
||||
if (com->intr_enable & CD1400_SRER_TXRDY) {
|
||||
/*
|
||||
* Here due to sloppy SRER_TXRDY
|
||||
* enabling. Ignore. Come back when
|
||||
* tx is empty.
|
||||
*/
|
||||
cd_outb(iobase, CD1400_SRER, cy_align,
|
||||
com->intr_enable
|
||||
= com->intr_enable
|
||||
& ~CD1400_SRER_TXRDY
|
||||
| CD1400_SRER_TXMPTY);
|
||||
goto terminate_tx_service;
|
||||
}
|
||||
switch (com->etc) {
|
||||
case CD1400_ETC_SENDBREAK:
|
||||
case CD1400_ETC_STOPBREAK:
|
||||
/*
|
||||
* Start the command. Come back on
|
||||
* next tx empty interrupt, hopefully
|
||||
* after command has been executed.
|
||||
*/
|
||||
cd_outb(iobase, CD1400_COR2, cy_align,
|
||||
com->cor[1] |= CD1400_COR2_ETC);
|
||||
cd_outb(iobase, CD1400_TDR, cy_align,
|
||||
CD1400_ETC_CMD);
|
||||
cd_outb(iobase, CD1400_TDR, cy_align,
|
||||
com->etc);
|
||||
if (com->etc == CD1400_ETC_SENDBREAK)
|
||||
com->etc = ETC_BREAK_STARTING;
|
||||
else
|
||||
com->etc = ETC_BREAK_ENDING;
|
||||
goto terminate_tx_service;
|
||||
case ETC_BREAK_STARTING:
|
||||
/*
|
||||
* BREAK is now on. Continue with
|
||||
* SRER_TXMPTY processing, hopefully
|
||||
* don't come back.
|
||||
*/
|
||||
com->etc = ETC_BREAK_STARTED;
|
||||
break;
|
||||
case ETC_BREAK_STARTED:
|
||||
/*
|
||||
* Came back due to sloppy SRER_TXMPTY
|
||||
* enabling. Hope again.
|
||||
*/
|
||||
break;
|
||||
case ETC_BREAK_ENDING:
|
||||
/*
|
||||
* BREAK is now off. Continue with
|
||||
* SRER_TXMPTY processing and don't
|
||||
* come back. The SWI handler will
|
||||
* restart tx interrupts if necessary.
|
||||
*/
|
||||
cd_outb(iobase, CD1400_COR2, cy_align,
|
||||
com->cor[1]
|
||||
&= ~CD1400_COR2_ETC);
|
||||
com->etc = ETC_BREAK_ENDED;
|
||||
if (!(com->state & CS_ODONE)) {
|
||||
com_events += LOTS_OF_EVENTS;
|
||||
com->state |= CS_ODONE;
|
||||
setsofttty();
|
||||
}
|
||||
break;
|
||||
case ETC_BREAK_ENDED:
|
||||
/*
|
||||
* Shouldn't get here. Hope again.
|
||||
*/
|
||||
break;
|
||||
}
|
||||
}
|
||||
if (com->intr_enable & CD1400_SRER_TXMPTY) {
|
||||
if (!(com->extra_state & CSE_ODONE)) {
|
||||
com_events += LOTS_OF_EVENTS;
|
||||
|
|
@ -1530,14 +1620,20 @@ sioioctl(dev, cmd, data, flag, p)
|
|||
return (error);
|
||||
}
|
||||
switch (cmd) {
|
||||
#if 0
|
||||
case TIOCSBRK:
|
||||
#if 0
|
||||
outb(iobase + com_cfcr, com->cfcr_image |= CFCR_SBREAK);
|
||||
#else
|
||||
cd_etc(com, CD1400_ETC_SENDBREAK);
|
||||
#endif
|
||||
break;
|
||||
case TIOCCBRK:
|
||||
#if 0
|
||||
outb(iobase + com_cfcr, com->cfcr_image &= ~CFCR_SBREAK);
|
||||
#else
|
||||
cd_etc(com, CD1400_ETC_STOPBREAK);
|
||||
#endif
|
||||
break;
|
||||
#endif /* 0 */
|
||||
case TIOCSDTR:
|
||||
(void)commctl(com, TIOCM_DTR, DMBIS);
|
||||
break;
|
||||
|
|
@ -1682,13 +1778,6 @@ siopoll()
|
|||
(*linesw[tp->t_line].l_modem)
|
||||
(tp, com->prev_modem_status & MSR_DCD);
|
||||
}
|
||||
if (com->state & CS_ODONE) {
|
||||
disable_intr();
|
||||
com_events -= LOTS_OF_EVENTS;
|
||||
com->state &= ~CS_ODONE;
|
||||
enable_intr();
|
||||
(*linesw[tp->t_line].l_start)(tp);
|
||||
}
|
||||
if (com->extra_state & CSE_ODONE) {
|
||||
disable_intr();
|
||||
com_events -= LOTS_OF_EVENTS;
|
||||
|
|
@ -1698,6 +1787,18 @@ siopoll()
|
|||
tp->t_state &= ~TS_BUSY;
|
||||
ttwwakeup(com->tp);
|
||||
}
|
||||
if (com->etc != ETC_NONE) {
|
||||
if (com->etc == ETC_BREAK_ENDED)
|
||||
com->etc = ETC_NONE;
|
||||
wakeup(&com->etc);
|
||||
}
|
||||
}
|
||||
if (com->state & CS_ODONE) {
|
||||
disable_intr();
|
||||
com_events -= LOTS_OF_EVENTS;
|
||||
com->state &= ~CS_ODONE;
|
||||
enable_intr();
|
||||
(*linesw[tp->t_line].l_start)(tp);
|
||||
}
|
||||
if (incc <= 0 || !(tp->t_state & TS_ISOPEN))
|
||||
continue;
|
||||
|
|
@ -2257,26 +2358,35 @@ siostop(tp, rw)
|
|||
int rw;
|
||||
{
|
||||
struct com_s *com;
|
||||
bool_t wakeup_etc;
|
||||
|
||||
com = com_addr(DEV_TO_UNIT(tp->t_dev));
|
||||
wakeup_etc = FALSE;
|
||||
disable_intr();
|
||||
if (rw & FWRITE) {
|
||||
com->obufs[0].l_queued = FALSE;
|
||||
com->obufs[1].l_queued = FALSE;
|
||||
if (com->state & CS_ODONE)
|
||||
com_events -= LOTS_OF_EVENTS;
|
||||
com->state &= ~(CS_ODONE | CS_BUSY);
|
||||
if (com->extra_state & CSE_ODONE) {
|
||||
com_events -= LOTS_OF_EVENTS;
|
||||
com->extra_state &= ~CSE_ODONE;
|
||||
if (com->etc != ETC_NONE) {
|
||||
if (com->etc == ETC_BREAK_ENDED)
|
||||
com->etc = ETC_NONE;
|
||||
wakeup_etc = TRUE;
|
||||
}
|
||||
}
|
||||
com->tp->t_state &= ~TS_BUSY;
|
||||
if (com->state & CS_ODONE)
|
||||
com_events -= LOTS_OF_EVENTS;
|
||||
com->state &= ~(CS_ODONE | CS_BUSY);
|
||||
}
|
||||
if (rw & FREAD) {
|
||||
com_events -= (com->iptr - com->ibuf);
|
||||
com->iptr = com->ibuf;
|
||||
}
|
||||
enable_intr();
|
||||
if (wakeup_etc)
|
||||
wakeup(&com->etc);
|
||||
comstart(tp);
|
||||
|
||||
/* XXX should clear h/w fifos too. */
|
||||
|
|
@ -2583,6 +2693,47 @@ cd1400_channel_cmd(com, cmd)
|
|||
cd_setreg(com, CD1400_CCR, cmd);
|
||||
}
|
||||
|
||||
static void
|
||||
cd_etc(com, etc)
|
||||
struct com_s *com;
|
||||
int etc;
|
||||
{
|
||||
/*
|
||||
* We can't change the hardware's ETC state while there are any
|
||||
* characters in the tx fifo, since those characters would be
|
||||
* interpreted as commands! Unputting characters from the fifo
|
||||
* is difficult, so we wait up to 12 character times for the fifo
|
||||
* to drain. The command will be delayed for up to 2 character
|
||||
* times for the tx to become empty. Unputting characters from
|
||||
* the tx holding and shift registers is impossible, so we wait
|
||||
* for the tx to become empty so that the command is sure to be
|
||||
* executed soon after we issue it.
|
||||
*/
|
||||
disable_intr();
|
||||
if (com->etc == etc) {
|
||||
enable_intr();
|
||||
goto wait;
|
||||
}
|
||||
if (etc == CD1400_ETC_SENDBREAK
|
||||
&& (com->etc == ETC_BREAK_STARTING
|
||||
|| com->etc == ETC_BREAK_STARTED)
|
||||
|| etc == CD1400_ETC_STOPBREAK
|
||||
&& (com->etc == ETC_BREAK_ENDING || com->etc == ETC_BREAK_ENDED
|
||||
|| com->etc == ETC_NONE)) {
|
||||
enable_intr();
|
||||
return;
|
||||
}
|
||||
com->etc = etc;
|
||||
cd_setreg(com, CD1400_SRER,
|
||||
com->intr_enable
|
||||
= com->intr_enable & ~CD1400_SRER_TXRDY | CD1400_SRER_TXMPTY);
|
||||
enable_intr();
|
||||
wait:
|
||||
while (com->etc == etc
|
||||
&& tsleep(&com->etc, TTIPRI | PCATCH, "cyetc", 0) == 0)
|
||||
continue;
|
||||
}
|
||||
|
||||
static int
|
||||
cd_getreg(com, reg)
|
||||
struct com_s *com;
|
||||
|
|
|
|||
|
|
@ -27,7 +27,7 @@
|
|||
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
|
||||
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
||||
*
|
||||
* $Id$
|
||||
* $Id: cd1400.h,v 1.4 1997/02/22 09:37:59 peter Exp $
|
||||
*/
|
||||
|
||||
/*
|
||||
|
|
@ -99,6 +99,7 @@
|
|||
#define CD1400_CCR_CMDRESET (1<<7) /* enables following: */
|
||||
#define CD1400_CCR_FTF (1<<1) /* flush tx fifo */
|
||||
#define CD1400_CCR_FULLRESET (1<<0) /* full reset */
|
||||
#define CD1400_CCR_CHANRESET 0 /* current channel */
|
||||
#define CD1400_CCR_CMDCORCHG (1<<6) /* enables following: */
|
||||
#define CD1400_CCR_COR3 (1<<3) /* COR3 changed */
|
||||
#define CD1400_CCR_COR2 (1<<2) /* COR2 changed */
|
||||
|
|
@ -133,6 +134,10 @@
|
|||
#define CD1400_COR2_IXANY (1<<7) /* implied XON mode */
|
||||
#define CD1400_COR2_IXOFF (1<<6) /* in-band tx flow control */
|
||||
#define CD1400_COR2_ETC (1<<5) /* embedded tx command */
|
||||
#define CD1400_ETC_CMD 0x00 /* start an ETC */
|
||||
#define CD1400_ETC_SENDBREAK 0x81
|
||||
#define CD1400_ETC_INSERTDELAY 0x82
|
||||
#define CD1400_ETC_STOPBREAK 0x83
|
||||
#define CD1400_COR2_LLM (1<<4) /* local loopback mode */
|
||||
#define CD1400_COR2_RLM (1<<3) /* remote loopback mode */
|
||||
#define CD1400_COR2_RTSAO (1<<2) /* RTS auto output */
|
||||
|
|
|
|||
Loading…
Reference in a new issue