[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>

diff --git a/drivers/serial/cpm_uart/cpm_uart_core.c b/drivers/serial/cpm_uart/cpm_uart_core.c
index ced193b..b9d1185 100644 (file)
--- 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 (file)
--- 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 (file)
--- 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)