1 files changed, 120 insertions, 0 deletions

diff --git a/include/asm-mn10300/unit-asb2305/serial.h b/include/asm-mn10300/unit-asb2305/serial.h
new file mode 100644
index 000000000000..73d31d67bb71
--- /dev/null
+++ b/include/asm-mn10300/unit-asb2305/serial.h
@@ -0,0 +1,120 @@
+/* ASB2305-specific 8250 serial ports
+ *
+ * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
+ * Written by David Howells (dhowells@redhat.com)
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public Licence
+ * as published by the Free Software Foundation; either version
+ * 2 of the Licence, or (at your option) any later version.
+ */
+#ifndef _ASM_UNIT_SERIAL_H
+#define _ASM_UNIT_SERIAL_H
+
+#include <asm/cpu/cpu-regs.h>
+#include <asm/proc/irq.h>
+#include <linux/serial_reg.h>
+
+#define SERIAL_PORT0_BASE_ADDRESS       0xA6FB0000
+#define ASB2305_DEBUG_MCR       __SYSREG(0xA6FB0000 + UART_MCR * 2, u8)
+
+#define SERIAL_IRQ      XIRQ0   /* Dual serial (PC16552)        (Hi) */
+
+/*
+ * dispose of the /dev/ttyS0 serial port
+ */
+#ifndef CONFIG_GDBSTUB_ON_TTYSx
+
+#define SERIAL_PORT_DFNS                                                \
+        {                                                               \
+        .baud_base              = BASE_BAUD,                            \
+        .irq                    = SERIAL_IRQ,                           \
+        .flags                  = STD_COM_FLAGS,                        \
+        .iomem_base             = (u8 *) SERIAL_PORT0_BASE_ADDRESS,     \
+        .iomem_reg_shift        = 2,                                    \
+        .io_type                = SERIAL_IO_MEM,                        \
+        },
+
+#ifndef __ASSEMBLY__
+
+static inline void __debug_to_serial(const char *p, int n)
+{
+}
+
+#endif /* !__ASSEMBLY__ */
+
+#else /* CONFIG_GDBSTUB_ON_TTYSx */
+
+#define SERIAL_PORT_DFNS /* stolen by gdb-stub */
+
+#if defined(CONFIG_GDBSTUB_ON_TTYS0)
+#define GDBPORT_SERIAL_RX       __SYSREG(SERIAL_PORT0_BASE_ADDRESS + UART_RX  * 4, u8)
+#define GDBPORT_SERIAL_TX       __SYSREG(SERIAL_PORT0_BASE_ADDRESS + UART_TX  * 4, u8)
+#define GDBPORT_SERIAL_DLL      __SYSREG(SERIAL_PORT0_BASE_ADDRESS + UART_DLL * 4, u8)
+#define GDBPORT_SERIAL_DLM      __SYSREG(SERIAL_PORT0_BASE_ADDRESS + UART_DLM * 4, u8)
+#define GDBPORT_SERIAL_IER      __SYSREG(SERIAL_PORT0_BASE_ADDRESS + UART_IER * 4, u8)
+#define GDBPORT_SERIAL_IIR      __SYSREG(SERIAL_PORT0_BASE_ADDRESS + UART_IIR * 4, u8)
+#define GDBPORT_SERIAL_FCR      __SYSREG(SERIAL_PORT0_BASE_ADDRESS + UART_FCR * 4, u8)
+#define GDBPORT_SERIAL_LCR      __SYSREG(SERIAL_PORT0_BASE_ADDRESS + UART_LCR * 4, u8)
+#define GDBPORT_SERIAL_MCR      __SYSREG(SERIAL_PORT0_BASE_ADDRESS + UART_MCR * 4, u8)
+#define GDBPORT_SERIAL_LSR      __SYSREG(SERIAL_PORT0_BASE_ADDRESS + UART_LSR * 4, u8)
+#define GDBPORT_SERIAL_MSR      __SYSREG(SERIAL_PORT0_BASE_ADDRESS + UART_MSR * 4, u8)
+#define GDBPORT_SERIAL_SCR      __SYSREG(SERIAL_PORT0_BASE_ADDRESS + UART_SCR * 4, u8)
+#define GDBPORT_SERIAL_IRQ      SERIAL_IRQ
+
+#elif defined(CONFIG_GDBSTUB_ON_TTYS1)
+#error The ASB2305 doesnt have a /dev/ttyS1
+#endif
+
+#ifndef __ASSEMBLY__
+
+#define TTYS0_TX        __SYSREG(SERIAL_PORT0_BASE_ADDRESS + UART_TX  * 4, u8)
+#define TTYS0_MCR       __SYSREG(SERIAL_PORT0_BASE_ADDRESS + UART_MCR * 4, u8)
+#define TTYS0_LSR       __SYSREG(SERIAL_PORT0_BASE_ADDRESS + UART_LSR * 4, u8)
+#define TTYS0_MSR       __SYSREG(SERIAL_PORT0_BASE_ADDRESS + UART_MSR * 4, u8)
+
+#define LSR_WAIT_FOR(STATE)                             \
+do {                                                    \
+        while (!(TTYS0_LSR & UART_LSR_##STATE)) {}      \
+} while (0)
+#define FLOWCTL_WAIT_FOR(LINE)                          \
+do {                                                    \
+        while (!(TTYS0_MSR & UART_MSR_##LINE)) {}       \
+} while (0)
+#define FLOWCTL_CLEAR(LINE)                     \
+do {                                            \
+        TTYS0_MCR &= ~UART_MCR_##LINE;          \
+} while (0)
+#define FLOWCTL_SET(LINE)                       \
+do {                                            \
+        TTYS0_MCR |= UART_MCR_##LINE;           \
+} while (0)
+#define FLOWCTL_QUERY(LINE)     ({ TTYS0_MSR & UART_MSR_##LINE; })
+
+static inline void __debug_to_serial(const char *p, int n)
+{
+        char ch;
+
+        FLOWCTL_SET(DTR);
+
+        for (; n > 0; n--) {
+                LSR_WAIT_FOR(THRE);
+                FLOWCTL_WAIT_FOR(CTS);
+
+                ch = *p++;
+                if (ch == 0x0a) {
+                        TTYS0_TX = 0x0d;
+                        LSR_WAIT_FOR(THRE);
+                        FLOWCTL_WAIT_FOR(CTS);
+                }
+                TTYS0_TX = ch;
+        }
+
+        FLOWCTL_CLEAR(DTR);
+}
+
+#endif /* !__ASSEMBLY__ */
+
+#endif /* CONFIG_GDBSTUB_ON_TTYSx */
+
+#endif /* _ASM_UNIT_SERIAL_H */