From: Shubhrajyoti D <shubhrajyoti@ti.com>
To: linux-serial@vger.kernel.org
Cc: linux-omap@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
Vikram Pandita <vikram.pandita@ti.com>,
stable@vger.kernel.org, "Govindraj.R" <govindraj.raja@ti.com>,
Shubhrajyoti D <shubhrajyoti@ti.com>
Subject: [PATCH 3/7] UART: OMAP: fix software flow control
Date: Mon, 16 Apr 2012 20:36:57 +0530 [thread overview]
Message-ID: <1334588821-5224-4-git-send-email-shubhrajyoti@ti.com> (raw)
In-Reply-To: <1334588821-5224-1-git-send-email-shubhrajyoti@ti.com>
From: Vikram Pandita <vikram.pandita@ti.com>
Software flow control register bits were not defined correctly.
Also clarify the IXON and IXOFF logic to reflect what userspace wants.
Cc: stable@vger.kernel.org
Cc: Govindraj.R <govindraj.raja@ti.com>
Signed-off-by: Vikram Pandita <vikram.pandita@ti.com>
Signed-off-by: Shubhrajyoti D <shubhrajyoti@ti.com>
---
arch/arm/plat-omap/include/plat/omap-serial.h | 4 ++--
drivers/tty/serial/omap-serial.c | 12 ++++++------
2 files changed, 8 insertions(+), 8 deletions(-)
diff --git a/arch/arm/plat-omap/include/plat/omap-serial.h b/arch/arm/plat-omap/include/plat/omap-serial.h
index b7fb6dc..6edc30a 100644
--- a/arch/arm/plat-omap/include/plat/omap-serial.h
+++ b/arch/arm/plat-omap/include/plat/omap-serial.h
@@ -42,10 +42,10 @@
#define OMAP_UART_WER_MOD_WKUP 0X7F
/* Enable XON/XOFF flow control on output */
-#define OMAP_UART_SW_TX 0x04
+#define OMAP_UART_SW_TX 0x8
/* Enable XON/XOFF flow control on input */
-#define OMAP_UART_SW_RX 0x04
+#define OMAP_UART_SW_RX 0x2
#define OMAP_UART_SYSC_RESET 0X07
#define OMAP_UART_TCR_TRIG 0X0F
diff --git a/drivers/tty/serial/omap-serial.c b/drivers/tty/serial/omap-serial.c
index 10e80bb..887d578 100644
--- a/drivers/tty/serial/omap-serial.c
+++ b/drivers/tty/serial/omap-serial.c
@@ -651,19 +651,19 @@ serial_omap_configure_xonxoff
/*
* IXON Flag:
- * Enable XON/XOFF flow control on output.
- * Transmit XON1, XOFF1
+ * Flow control for OMAP.TX
+ * OMAP.RX should listen for XON/XOFF
*/
if (termios->c_iflag & IXON)
- up->efr |= OMAP_UART_SW_TX;
+ up->efr |= OMAP_UART_SW_RX;
/*
* IXOFF Flag:
- * Enable XON/XOFF flow control on input.
- * Receiver compares XON1, XOFF1.
+ * Flow control for OMAP.RX
+ * OMAP.TX should send XON/XOFF
*/
if (termios->c_iflag & IXOFF)
- up->efr |= OMAP_UART_SW_RX;
+ up->efr |= OMAP_UART_SW_TX;
serial_out(up, UART_EFR, up->efr | UART_EFR_ECB);
serial_out(up, UART_LCR, UART_LCR_CONF_MODE_A);
--
1.7.4.1
next prev parent reply other threads:[~2012-04-16 15:06 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-04-16 15:06 [PATCH 0/7] UART: OMAP: Updates Shubhrajyoti D
2012-04-16 15:06 ` [PATCH 1/7] ARM: OMAP: UART: Make context_loss_cnt signed Shubhrajyoti D
2012-04-16 15:06 ` [PATCH 2/7] UART: OMAP: Cut the clock in the error cases Shubhrajyoti D
2012-04-18 0:06 ` Kevin Hilman
2012-04-18 6:44 ` Shubhrajyoti
2012-04-18 14:00 ` Kevin Hilman
2012-04-18 15:13 ` Shubhrajyoti
2012-04-20 13:20 ` Shubhrajyoti Datta
2012-04-20 13:46 ` Kevin Hilman
2012-04-16 15:06 ` Shubhrajyoti D [this message]
2012-04-16 15:06 ` [PATCH 4/7] UART: OMAP: Remove the default setting of special character Shubhrajyoti D
2012-04-16 15:06 ` [PATCH 5/7] UART: OMAP: Prevent cutting of clocks if put_sync immediately follows Shubhrajyoti D
2012-04-16 15:07 ` [PATCH 6/7] UART: OMAP: Remove the hardcode serial_omap_console_ports array Shubhrajyoti D
2012-04-16 15:07 ` [PATCH 7/7] UART: OMAP: Trivial optimisation of the probe and remove Shubhrajyoti D
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