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authorAlexandre Belloni <alexandre.belloni@free-electrons.com>2015-01-12 21:42:14 +0300
committerNicolas Ferre <nicolas.ferre@atmel.com>2015-01-15 17:24:06 +0300
commit5f58c97099f20cb12b463d3bb8bf0cbe522deb22 (patch)
tree36c485eb3e3409e4ad7c42c138e33e47c578430a /arch/arm/include/debug
parent415c94743524696d66e2bbbc00b72ad593cb0187 (diff)
downloadlinux-5f58c97099f20cb12b463d3bb8bf0cbe522deb22.tar.xz
ARM: at91: move debug-macro.S into the common space
Move debug-macro.S from include/mach/ to include/debug where all other common debug macros are. Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com> Acked-by: Boris Brezillon <boris.brezillon@free-electrons.com> Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Diffstat (limited to 'arch/arm/include/debug')
-rw-r--r--arch/arm/include/debug/at91.S49
1 files changed, 49 insertions, 0 deletions
diff --git a/arch/arm/include/debug/at91.S b/arch/arm/include/debug/at91.S
new file mode 100644
index 000000000000..80a6501b4d50
--- /dev/null
+++ b/arch/arm/include/debug/at91.S
@@ -0,0 +1,49 @@
+/*
+ * Copyright (C) 2003-2005 SAN People
+ *
+ * Debugging macro include header
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+*/
+
+#if defined(CONFIG_AT91_DEBUG_LL_DBGU0)
+#define AT91_DBGU 0xfffff200 /* AT91_BASE_DBGU0 */
+#elif defined(CONFIG_AT91_DEBUG_LL_DBGU1)
+#define AT91_DBGU 0xffffee00 /* AT91_BASE_DBGU1 */
+#else
+/* On sama5d4, use USART3 as low level serial console */
+#define AT91_DBGU 0xfc00c000 /* SAMA5D4_BASE_USART3 */
+#endif
+
+/* Keep in sync with mach-at91/include/mach/hardware.h */
+#define AT91_IO_P2V(x) ((x) - 0x01000000)
+
+#define AT91_DBGU_SR (0x14) /* Status Register */
+#define AT91_DBGU_THR (0x1c) /* Transmitter Holding Register */
+#define AT91_DBGU_TXRDY (1 << 1) /* Transmitter Ready */
+#define AT91_DBGU_TXEMPTY (1 << 9) /* Transmitter Empty */
+
+ .macro addruart, rp, rv, tmp
+ ldr \rp, =AT91_DBGU @ System peripherals (phys address)
+ ldr \rv, =AT91_IO_P2V(AT91_DBGU) @ System peripherals (virt address)
+ .endm
+
+ .macro senduart,rd,rx
+ strb \rd, [\rx, #(AT91_DBGU_THR)] @ Write to Transmitter Holding Register
+ .endm
+
+ .macro waituart,rd,rx
+1001: ldr \rd, [\rx, #(AT91_DBGU_SR)] @ Read Status Register
+ tst \rd, #AT91_DBGU_TXRDY @ DBGU_TXRDY = 1 when ready to transmit
+ beq 1001b
+ .endm
+
+ .macro busyuart,rd,rx
+1001: ldr \rd, [\rx, #(AT91_DBGU_SR)] @ Read Status Register
+ tst \rd, #AT91_DBGU_TXEMPTY @ DBGU_TXEMPTY = 1 when transmission complete
+ beq 1001b
+ .endm
+