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Message-Id: <1345717983-18179-21-git-send-email-balbi@ti.com>
Date: Thu, 23 Aug 2012 13:33:00 +0300
From: Felipe Balbi <balbi@...com>
To: alan@...ux.intel.com
Cc: Tony Lindgren <tony@...mide.com>, Kevin Hilman <khilman@...com>,
Linux OMAP Mailing List <linux-omap@...r.kernel.org>,
Linux ARM Kernel Mailing List
<linux-arm-kernel@...ts.infradead.org>,
linux-serial@...r.kernel.org,
Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
Santosh Shilimkar <santosh.shilimkar@...com>,
Shubhrajyoti Datta <shubhrajyoti@...com>,
Sourav Poddar <sourav.poddar@...com>,
Vikram Pandita <vikram.pandita@...com>, stable@...r.kernel.org,
Felipe Balbi <balbi@...com>
Subject: [PATCH v3 20/23] serial: omap: fix software flow control
From: Vikram Pandita <vikram.pandita@...com>
Software flow control register bits were not defined correctly.
Also clarify the IXON and IXOFF logic to reflect what userspace wants.
Cc: stable@...r.kernel.org
Tested-by: Shubhrajyoti D <shubhrajyoti@...com>
Signed-off-by: Vikram Pandita <vikram.pandita@...com>
Signed-off-by: Shubhrajyoti D <shubhrajyoti@...com>
Signed-off-by: Felipe Balbi <balbi@...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 743ac80..12e6805 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 c3579c0..d49981d 100644
--- a/drivers/tty/serial/omap-serial.c
+++ b/drivers/tty/serial/omap-serial.c
@@ -606,19 +606,19 @@ 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);
--
1.7.12.rc3
--
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