1 files changed, 131 insertions, 0 deletions
diff --git a/arch/blackfin/include/asm/serial.h b/arch/blackfin/include/asm/serial.h
new file mode 100644
index 0000000000..87a337d1b4
--- /dev/null
+++ b/arch/blackfin/include/asm/serial.h
@@ -0,0 +1,131 @@
+/*
+ * serial.h - common serial defines for early debug and serial driver.
+ *            any functions defined here must be always_inline since
+ *            initcode cannot have function calls.
+ *
+ * Copyright (c) 2004-2011 Analog Devices Inc.
+ *
+ * Licensed under the GPL-2 or later.
+ */
+
+#ifndef __BFIN_CPU_SERIAL_H__
+#define __BFIN_CPU_SERIAL_H__
+
+#include <asm/blackfin.h>
+#include <asm/portmux.h>
+
+#ifndef CONFIG_UART_CONSOLE
+# define CONFIG_UART_CONSOLE 0
+#endif
+
+#ifdef CONFIG_DEBUG_EARLY_SERIAL
+# define BFIN_DEBUG_EARLY_SERIAL 1
+#else
+# define BFIN_DEBUG_EARLY_SERIAL 0
+#endif
+
+#if defined(__ADSPBF60x__)
+# define BFIN_UART_HW_VER 4
+#elif defined(__ADSPBF50x__) || defined(__ADSPBF54x__)
+# define BFIN_UART_HW_VER 2
+#else
+# define BFIN_UART_HW_VER 1
+#endif
+
+#define __PASTE_UART(num, pfx, sfx) pfx##num##_##sfx
+#define _PASTE_UART(num, pfx, sfx) __PASTE_UART(num, pfx, sfx)
+#define _P_UART(n, pin) _PASTE_UART(n, P_UART, pin)
+#define P_UART(pin) _P_UART(CONFIG_UART_CONSOLE, pin)
+
+#define pUART ((volatile struct bfin_mmr_serial *)uart_base)
+
+#ifndef __ASSEMBLY__
+__attribute__((always_inline))
+static inline void serial_do_portmux(void);
+#endif
+
+#if BFIN_UART_HW_VER < 4
+# include "serial1.h"
+#else
+# include "serial4.h"
+#endif
+
+#ifndef __ASSEMBLY__
+
+__attribute__((always_inline))
+static inline void serial_do_portmux(void)
+{
+	if (!BFIN_DEBUG_EARLY_SERIAL) {
+		const unsigned short pins[] = { P_UART(RX), P_UART(TX), 0, };
+		peripheral_request_list(pins, "bfin-uart");
+		return;
+	}
+
+	serial_early_do_portmux();
+}
+
+#ifndef BFIN_IN_INITCODE
+__attribute__((always_inline))
+static inline void serial_early_puts(const char *s)
+{
+	if (BFIN_DEBUG_EARLY_SERIAL) {
+		serial_puts("Early: ");
+		serial_puts(s);
+	}
+}
+#endif
+
+#else
+
+.macro serial_early_init
+#if defined(CONFIG_DEBUG_EARLY_SERIAL) && !defined(CONFIG_UART_MEM)
+	call __serial_early_init;
+#endif
+.endm
+
+.macro serial_early_set_baud
+#if defined(CONFIG_DEBUG_EARLY_SERIAL) && !defined(CONFIG_UART_MEM)
+	R0.L = LO(CONFIG_BAUDRATE);
+	R0.H = HI(CONFIG_BAUDRATE);
+	call __serial_early_set_baud;
+#endif
+.endm
+
+#if CONFIG_BFIN_BOOT_MODE == BFIN_BOOT_BYPASS
+#define update_serial_early_string_addr \
+	R1.L = _start; \
+	R1.H = _start; \
+	R0 = R0 - R1; \
+	R1.L = 0; \
+	R1.H = 0x2000; \
+	R0 = R0 + R1;
+#else
+#define update_serial_early_string_addr
+#endif
+
+/* Since we embed the string right into our .text section, we need
+ * to find its address.  We do this by getting our PC and adding 2
+ * bytes (which is the length of the jump instruction).  Then we
+ * pass this address to serial_puts().
+ */
+#ifdef CONFIG_DEBUG_EARLY_SERIAL
+# define serial_early_puts(str) \
+	.section .rodata; \
+	7: \
+	.ascii "Early:"; \
+	.ascii __FILE__; \
+	.ascii ": "; \
+	.ascii str; \
+	.asciz "\n"; \
+	.previous; \
+	R0.L = 7b; \
+	R0.H = 7b; \
+	update_serial_early_string_addr \
+	call _uart_early_puts;
+#else
+# define serial_early_puts(str)
+#endif
+
+#endif
+
+#endif