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[src/trunk]: src/sys/dev/usb Don't accumulate RX data into packets on CH341.
details: https://anonhg.NetBSD.org/src/rev/ef4d47a51eaf
branches: trunk
changeset: 995159:ef4d47a51eaf
user: jakllsch <jakllsch%NetBSD.org@localhost>
date: Mon Dec 10 00:22:13 2018 +0000
description:
Don't accumulate RX data into packets on CH341.
diffstat:
sys/dev/usb/uchcom.c | 10 +++++++---
1 files changed, 7 insertions(+), 3 deletions(-)
diffs (38 lines):
diff -r 4af436333a96 -r ef4d47a51eaf sys/dev/usb/uchcom.c
--- a/sys/dev/usb/uchcom.c Mon Dec 10 00:03:11 2018 +0000
+++ b/sys/dev/usb/uchcom.c Mon Dec 10 00:22:13 2018 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: uchcom.c,v 1.18 2018/12/10 00:03:11 jakllsch Exp $ */
+/* $NetBSD: uchcom.c,v 1.19 2018/12/10 00:22:13 jakllsch Exp $ */
/*
* Copyright (c) 2007 The NetBSD Foundation, Inc.
@@ -30,7 +30,7 @@
*/
#include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: uchcom.c,v 1.18 2018/12/10 00:03:11 jakllsch Exp $");
+__KERNEL_RCSID(0, "$NetBSD: uchcom.c,v 1.19 2018/12/10 00:22:13 jakllsch Exp $");
#ifdef _KERNEL_OPT
#include "opt_usb.h"
@@ -98,6 +98,9 @@
#define UCHCOM_VER_30 0x30
#define UCHCOM_BASE_UNKNOWN 0
+
+#define UCHCOM_BPS_PRE_IMM 0x80 /* CH341: immediate RX forwarding */
+
#define UCHCOM_BPS_MOD_BASE 20000000
#define UCHCOM_BPS_MOD_BASE_OFS 1100
@@ -706,7 +709,8 @@
return EINVAL;
if ((err = write_reg(sc,
- UCHCOM_REG_BPS_PRE, dv.dv_prescaler,
+ UCHCOM_REG_BPS_PRE,
+ dv.dv_prescaler | UCHCOM_BPS_PRE_IMM,
UCHCOM_REG_BPS_DIV, dv.dv_div)) ||
(err = write_reg(sc,
UCHCOM_REG_BPS_MOD, dv.dv_mod,
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