Date: Sat, 23 Jan 2016 19:13:48 +0000 (UTC) From: Ian Lepore <ian@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-10@freebsd.org Subject: svn commit: r294637 - stable/10/sys/dev/usb/serial Message-ID: <201601231913.u0NJDmw1024312@repo.freebsd.org>
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Author: ian Date: Sat Jan 23 19:13:48 2016 New Revision: 294637 URL: https://svnweb.freebsd.org/changeset/base/294637 Log: MFC r294235: Make PPS ASSERT/CLEAR events match the RS-232 signal levels as per RFC 2783. Previously the polarity was for TTL levels, which are the reverse of RS-232. Also add handling of the UART_PPS_INVERT_PULSE option bit in the sysctl value, the same as was recently added to uart(4), so that people using TTL level connections can request a logical inverting of the signal. Use the named constants from the new dev/uart/uart_ppstypes.h for the pps capture modes and option bits. Modified: stable/10/sys/dev/usb/serial/usb_serial.c Directory Properties: stable/10/ (props changed) Modified: stable/10/sys/dev/usb/serial/usb_serial.c ============================================================================== --- stable/10/sys/dev/usb/serial/usb_serial.c Sat Jan 23 17:08:17 2016 (r294636) +++ stable/10/sys/dev/usb/serial/usb_serial.c Sat Jan 23 19:13:48 2016 (r294637) @@ -81,6 +81,8 @@ __FBSDID("$FreeBSD$"); #include <sys/cons.h> #include <sys/kdb.h> +#include <dev/uart/uart_ppstypes.h> + #include <dev/usb/usb.h> #include <dev/usb/usbdi.h> #include <dev/usb/usbdi_util.h> @@ -99,7 +101,8 @@ static SYSCTL_NODE(_hw_usb, OID_AUTO, uc static int ucom_pps_mode; SYSCTL_INT(_hw_usb_ucom, OID_AUTO, pps_mode, CTLFLAG_RWTUN, - &ucom_pps_mode, 0, "pulse capturing mode - 0/1/2 - disabled/CTS/DCD"); + &ucom_pps_mode, 0, + "pulse capture mode: 0/1/2=disabled/CTS/DCD; add 0x10 to invert"); #ifdef USB_DEBUG static int ucom_debug = 0; @@ -1074,10 +1077,12 @@ ucom_cfg_status_change(struct usb_proc_m (struct ucom_cfg_task *)_task; struct ucom_softc *sc = task->sc; struct tty *tp; + int onoff; uint8_t new_msr; uint8_t new_lsr; uint8_t msr_delta; uint8_t lsr_delta; + uint8_t pps_signal; tp = sc->sc_tty; @@ -1107,35 +1112,33 @@ ucom_cfg_status_change(struct usb_proc_m sc->sc_lsr = new_lsr; /* - * Time pulse counting support. Note that both CTS and DCD are - * active-low signals. The status bit is high to indicate that - * the signal on the line is low, which corresponds to a PPS - * clear event. + * Time pulse counting support. */ - switch(ucom_pps_mode) { - case 1: - if ((sc->sc_pps.ppsparam.mode & PPS_CAPTUREBOTH) && - (msr_delta & SER_CTS)) { - pps_capture(&sc->sc_pps); - pps_event(&sc->sc_pps, (sc->sc_msr & SER_CTS) ? - PPS_CAPTURECLEAR : PPS_CAPTUREASSERT); - } + switch(ucom_pps_mode & UART_PPS_SIGNAL_MASK) { + case UART_PPS_CTS: + pps_signal = SER_CTS; break; - case 2: - if ((sc->sc_pps.ppsparam.mode & PPS_CAPTUREBOTH) && - (msr_delta & SER_DCD)) { - pps_capture(&sc->sc_pps); - pps_event(&sc->sc_pps, (sc->sc_msr & SER_DCD) ? - PPS_CAPTURECLEAR : PPS_CAPTUREASSERT); - } + case UART_PPS_DCD: + pps_signal = SER_DCD; break; default: + pps_signal = 0; break; } + if ((sc->sc_pps.ppsparam.mode & PPS_CAPTUREBOTH) && + (msr_delta & pps_signal)) { + pps_capture(&sc->sc_pps); + onoff = (sc->sc_msr & pps_signal) ? 1 : 0; + if (ucom_pps_mode & UART_PPS_INVERT_PULSE) + onoff = !onoff; + pps_event(&sc->sc_pps, onoff ? PPS_CAPTUREASSERT : + PPS_CAPTURECLEAR); + } + if (msr_delta & SER_DCD) { - int onoff = (sc->sc_msr & SER_DCD) ? 1 : 0; + onoff = (sc->sc_msr & SER_DCD) ? 1 : 0; DPRINTF("DCD changed to %d\n", onoff);
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