Blackfin Serial Driver: abstract away DLAB differences into header

Signed-off-by: NMike Frysinger <vapier.adi@gmail.com>
Signed-off-by: NBryan Wu <cooloney@kernel.org>

drivers/serial/bfin_5xx.c

@@ -136,10 +136,7 @@ void kgdb_put_debug_char(int chr)
 		SSYNC();
 	}
 
-#ifndef CONFIG_BF54x
-	UART_PUT_LCR(uart, UART_GET_LCR(uart)&(~DLAB));
-	SSYNC();
-#endif
+	UART_CLEAR_DLAB(uart);
 	UART_PUT_CHAR(uart, (unsigned char)chr);
 	SSYNC();
 }
@@ -158,10 +155,7 @@ int kgdb_get_debug_char(void)
 	while(!(UART_GET_LSR(uart) & DR)) {
 		SSYNC();
 	}
-#ifndef CONFIG_BF54x
-	UART_PUT_LCR(uart, UART_GET_LCR(uart)&(~DLAB));
-	SSYNC();
-#endif
+	UART_CLEAR_DLAB(uart);
 	chr = UART_GET_CHAR(uart);
 	SSYNC();
 
@@ -764,26 +758,15 @@ bfin_serial_set_termios(struct uart_port *port, struct ktermios *termios,
 	UART_PUT_IER(uart, 0);
 #endif
 
-#ifndef CONFIG_BF54x
 	/* Set DLAB in LCR to Access DLL and DLH */
-	val = UART_GET_LCR(uart);
-	val |= DLAB;
-	UART_PUT_LCR(uart, val);
-	SSYNC();
-#endif
+	UART_SET_DLAB(uart);
 
 	UART_PUT_DLL(uart, quot & 0xFF);
-	SSYNC();
 	UART_PUT_DLH(uart, (quot >> 8) & 0xFF);
 	SSYNC();
 
-#ifndef CONFIG_BF54x
 	/* Clear DLAB in LCR to Access THR RBR IER */
-	val = UART_GET_LCR(uart);
-	val &= ~DLAB;
-	UART_PUT_LCR(uart, val);
-	SSYNC();
-#endif
+	UART_CLEAR_DLAB(uart);
 
 	UART_PUT_LCR(uart, lcr);
 
@@ -946,8 +929,7 @@ bfin_serial_console_get_options(struct bfin_serial_port *uart, int *baud,
 	status = UART_GET_IER(uart) & (ERBFI | ETBEI);
 	if (status == (ERBFI | ETBEI)) {
 		/* ok, the port was enabled */
-		unsigned short lcr, val;
-		unsigned short dlh, dll;
+		u16 lcr, dlh, dll;
 
 		lcr = UART_GET_LCR(uart);
 
@@ -964,22 +946,14 @@ bfin_serial_console_get_options(struct bfin_serial_port *uart, int *baud,
 			case 2:	*bits = 7; break;
 			case 3:	*bits = 8; break;
 		}
-#ifndef CONFIG_BF54x
 		/* Set DLAB in LCR to Access DLL and DLH */
-		val = UART_GET_LCR(uart);
-		val |= DLAB;
-		UART_PUT_LCR(uart, val);
-#endif
+		UART_SET_DLAB(uart);
 
 		dll = UART_GET_DLL(uart);
 		dlh = UART_GET_DLH(uart);
 
-#ifndef CONFIG_BF54x
 		/* Clear DLAB in LCR to Access THR RBR IER */
-		val = UART_GET_LCR(uart);
-		val &= ~DLAB;
-		UART_PUT_LCR(uart, val);
-#endif
+		UART_CLEAR_DLAB(uart);
 
 		*baud = get_sclk() / (16*(dll | dlh << 8));
 	}

include/asm-blackfin/mach-bf527/bfin_serial_5xx.h

@@ -50,6 +50,9 @@
 #define UART_PUT_LCR(uart, v)    bfin_write16(((uart)->port.membase + OFFSET_LCR), v)
 #define UART_PUT_GCTL(uart, v)   bfin_write16(((uart)->port.membase + OFFSET_GCTL), v)
 
+#define UART_SET_DLAB(uart)     do { UART_PUT_LCR(uart, UART_GET_LCR(uart) | DLAB); SSYNC(); } while (0)
+#define UART_CLEAR_DLAB(uart)   do { UART_PUT_LCR(uart, UART_GET_LCR(uart) & ~DLAB); SSYNC(); } while (0)
+
 #if defined(CONFIG_BFIN_UART0_CTSRTS) || defined(CONFIG_BFIN_UART1_CTSRTS)
 # define CONFIG_SERIAL_BFIN_CTSRTS
 

include/asm-blackfin/mach-bf533/bfin_serial_5xx.h

@@ -50,6 +50,9 @@
 #define UART_PUT_LCR(uart,v)    bfin_write16(((uart)->port.membase + OFFSET_LCR),v)
 #define UART_PUT_GCTL(uart,v)   bfin_write16(((uart)->port.membase + OFFSET_GCTL),v)
 
+#define UART_SET_DLAB(uart)     do { UART_PUT_LCR(uart, UART_GET_LCR(uart) | DLAB); SSYNC(); } while (0)
+#define UART_CLEAR_DLAB(uart)   do { UART_PUT_LCR(uart, UART_GET_LCR(uart) & ~DLAB); SSYNC(); } while (0)
+
 #ifdef CONFIG_BFIN_UART0_CTSRTS
 # define CONFIG_SERIAL_BFIN_CTSRTS
 # ifndef CONFIG_UART0_CTS_PIN

include/asm-blackfin/mach-bf537/bfin_serial_5xx.h

@@ -50,6 +50,9 @@
 #define UART_PUT_LCR(uart,v)    bfin_write16(((uart)->port.membase + OFFSET_LCR),v)
 #define UART_PUT_GCTL(uart,v)   bfin_write16(((uart)->port.membase + OFFSET_GCTL),v)
 
+#define UART_SET_DLAB(uart)     do { UART_PUT_LCR(uart, UART_GET_LCR(uart) | DLAB); SSYNC(); } while (0)
+#define UART_CLEAR_DLAB(uart)   do { UART_PUT_LCR(uart, UART_GET_LCR(uart) & ~DLAB); SSYNC(); } while (0)
+
 #if defined(CONFIG_BFIN_UART0_CTSRTS) || defined(CONFIG_BFIN_UART1_CTSRTS)
 # define CONFIG_SERIAL_BFIN_CTSRTS
 

include/asm-blackfin/mach-bf548/bfin_serial_5xx.h

@@ -54,6 +54,9 @@
 #define UART_PUT_GCTL(uart,v)   bfin_write16(((uart)->port.membase + OFFSET_GCTL),v)
 #define UART_PUT_MCR(uart,v)    bfin_write16(((uart)->port.membase + OFFSET_MCR),v)
 
+#define UART_SET_DLAB(uart)     /* MMRs not muxed on BF54x */
+#define UART_CLEAR_DLAB(uart)   /* MMRs not muxed on BF54x */
+
 #if defined(CONFIG_BFIN_UART0_CTSRTS) || defined(CONFIG_BFIN_UART1_CTSRTS)
 # define CONFIG_SERIAL_BFIN_CTSRTS
 

include/asm-blackfin/mach-bf561/bfin_serial_5xx.h

@@ -50,6 +50,9 @@
 #define UART_PUT_LCR(uart,v)    bfin_write16(((uart)->port.membase + OFFSET_LCR),v)
 #define UART_PUT_GCTL(uart,v)   bfin_write16(((uart)->port.membase + OFFSET_GCTL),v)
 
+#define UART_SET_DLAB(uart)     do { UART_PUT_LCR(uart, UART_GET_LCR(uart) | DLAB); SSYNC(); } while (0)
+#define UART_CLEAR_DLAB(uart)   do { UART_PUT_LCR(uart, UART_GET_LCR(uart) & ~DLAB); SSYNC(); } while (0)
+
 #ifdef CONFIG_BFIN_UART0_CTSRTS
 # define CONFIG_SERIAL_BFIN_CTSRTS
 # ifndef CONFIG_UART0_CTS_PIN