picoxcell: support for Picochip picoxcell devices

[pandora-kernel.git] / arch / arm / mach-picoxcell / include / mach / debug-macro.S

diff --git a/arch/arm/mach-picoxcell/include/mach/debug-macro.S b/arch/arm/mach-picoxcell/include/mach/debug-macro.S
new file mode 100644 (file)
index 0000000..8f2c234
--- /dev/null
+++ b/arch/arm/mach-picoxcell/include/mach/debug-macro.S
@@ -0,0 +1,35 @@
+/*
+ * Copyright (c) 2011 Picochip Ltd., Jamie Iles
+ *
+ * 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.
+ *
+ * Derived from arch/arm/mach-davinci/include/mach/debug-macro.S to use 32-bit
+ * accesses to the 8250.
+ */
+#include <linux/serial_reg.h>
+#include <mach/hardware.h>
+#include <mach/map.h>
+
+#define UART_SHIFT 2
+
+               .macro  addruart, rp, rv
+               ldr     \rv, =PHYS_TO_IO(PICOXCELL_UART1_BASE)
+               ldr     \rp, =PICOXCELL_UART1_BASE
+               .endm
+
+               .macro  senduart,rd,rx
+               str     \rd, [\rx, #UART_TX << UART_SHIFT]
+               .endm
+
+               .macro  busyuart,rd,rx
+1002:          ldr     \rd, [\rx, #UART_LSR << UART_SHIFT]
+               and     \rd, \rd, #UART_LSR_TEMT | UART_LSR_THRE
+               teq     \rd, #UART_LSR_TEMT | UART_LSR_THRE
+               bne     1002b
+               .endm
+
+               /* The UART's don't have any flow control IO's wired up. */
+               .macro  waituart,rd,rx
+               .endm