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authorVitaly Bordug <vbordug@ru.mvista.com>2006-04-29 22:32:44 +0400
committerPaul Mackerras <paulus@samba.org>2006-05-03 23:06:43 +1000
commit61f5657c50341198ff05e375e6f1fc0476556562 (patch)
tree33c0fa26dc730885176f4be2a8853b1c0b65aa8a
parent0ccde0a290b44b8296b82a7683b4c299eb51ba6b (diff)
downloadop-kernel-dev-61f5657c50341198ff05e375e6f1fc0476556562.zip
op-kernel-dev-61f5657c50341198ff05e375e6f1fc0476556562.tar.gz
[PATCH] ppc32 CPM_UART: Fixed break send on SCC
SCC uart sends a break sequence each time it is stopped with the CPM_CR_STOP_TX command. That means that each time an application closes the serial device, a break is transmitted. To fix this, graceful tx stop is issued for SCC. Signed-off-by: David Jander <david.jander@protonic.nl> Signed-off-by: Vitaly Bordug <vbordug@ru.mvista.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
-rw-r--r--drivers/serial/cpm_uart/cpm_uart_core.c6
-rw-r--r--include/asm-ppc/commproc.h1
-rw-r--r--include/asm-ppc/cpm2.h2
3 files changed, 7 insertions, 2 deletions
diff --git a/drivers/serial/cpm_uart/cpm_uart_core.c b/drivers/serial/cpm_uart/cpm_uart_core.c
index ced193b..b9d1185 100644
--- a/drivers/serial/cpm_uart/cpm_uart_core.c
+++ b/drivers/serial/cpm_uart/cpm_uart_core.c
@@ -457,7 +457,11 @@ static void cpm_uart_shutdown(struct uart_port *port)
}
/* Shut them really down and reinit buffer descriptors */
- cpm_line_cr_cmd(line, CPM_CR_STOP_TX);
+ if (IS_SMC(pinfo))
+ cpm_line_cr_cmd(line, CPM_CR_STOP_TX);
+ else
+ cpm_line_cr_cmd(line, CPM_CR_GRA_STOP_TX);
+
cpm_uart_initbd(pinfo);
}
}
diff --git a/include/asm-ppc/commproc.h b/include/asm-ppc/commproc.h
index 973e609..31f3629 100644
--- a/include/asm-ppc/commproc.h
+++ b/include/asm-ppc/commproc.h
@@ -35,6 +35,7 @@
#define CPM_CR_INIT_TX ((ushort)0x0002)
#define CPM_CR_HUNT_MODE ((ushort)0x0003)
#define CPM_CR_STOP_TX ((ushort)0x0004)
+#define CPM_CR_GRA_STOP_TX ((ushort)0x0005)
#define CPM_CR_RESTART_TX ((ushort)0x0006)
#define CPM_CR_CLOSE_RX_BD ((ushort)0x0007)
#define CPM_CR_SET_GADDR ((ushort)0x0008)
diff --git a/include/asm-ppc/cpm2.h b/include/asm-ppc/cpm2.h
index b638b87..c70344b 100644
--- a/include/asm-ppc/cpm2.h
+++ b/include/asm-ppc/cpm2.h
@@ -69,7 +69,7 @@
#define CPM_CR_INIT_TX ((ushort)0x0002)
#define CPM_CR_HUNT_MODE ((ushort)0x0003)
#define CPM_CR_STOP_TX ((ushort)0x0004)
-#define CPM_CR_GRA_STOP_TX ((ushort)0x0005)
+#define CPM_CR_GRA_STOP_TX ((ushort)0x0005)
#define CPM_CR_RESTART_TX ((ushort)0x0006)
#define CPM_CR_SET_GADDR ((ushort)0x0008)
#define CPM_CR_START_IDMA ((ushort)0x0009)
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