1 files changed, 151 insertions, 0 deletions

diff --git a/arch/mn10300/unit-asb2364/include/unit/serial.h b/arch/mn10300/unit-asb2364/include/unit/serial.h
new file mode 100644
index 000000000000..7f048bbfdfd7
--- /dev/null
+++ b/arch/mn10300/unit-asb2364/include/unit/serial.h
@@ -0,0 +1,151 @@
+/* Unit-specific 8250 serial ports
+ *
+ * Copyright (C) 2005 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 License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+
+#ifndef _ASM_UNIT_SERIAL_H
+#define _ASM_UNIT_SERIAL_H
+
+#include <asm/cpu-regs.h>
+#include <proc/irq.h>
+#include <unit/fpga-regs.h>
+#include <linux/serial_reg.h>
+
+#define SERIAL_PORT0_BASE_ADDRESS       0xA8200000
+
+#define SERIAL_IRQ      XIRQ1   /* single serial (TL16C550C)    (Lo) */
+
+/*
+ * The ASB2364 has an 12.288 MHz clock
+ * for your UART.
+ *
+ * It'd be nice if someone built a serial card with a 24.576 MHz
+ * clock, since the 16550A is capable of handling a top speed of 1.5
+ * megabits/second; but this requires the faster clock.
+ */
+#define BASE_BAUD (12288000 / 16)
+
+/*
+ * dispose of the /dev/ttyS0 and /dev/ttyS1 serial ports
+ */
+#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 = 1,                                   \
+                .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 ASB2364 does not have a /dev/ttyS1
+#endif
+
+#ifndef __ASSEMBLY__
+
+static inline void __debug_to_serial(const char *p, int n)
+{
+        char ch;
+
+#define LSR_WAIT_FOR(STATE)     \
+        do {} while (!(GDBPORT_SERIAL_LSR & UART_LSR_##STATE))
+#define FLOWCTL_QUERY(LINE)     \
+        ({ GDBPORT_SERIAL_MSR & UART_MSR_##LINE; })
+#define FLOWCTL_WAIT_FOR(LINE)  \
+        do {} while (!(GDBPORT_SERIAL_MSR & UART_MSR_##LINE))
+#define FLOWCTL_CLEAR(LINE)     \
+        do { GDBPORT_SERIAL_MCR &= ~UART_MCR_##LINE; } while (0)
+#define FLOWCTL_SET(LINE)       \
+        do { GDBPORT_SERIAL_MCR |= UART_MCR_##LINE; } while (0)
+
+        FLOWCTL_SET(DTR);
+
+        for (; n > 0; n--) {
+                LSR_WAIT_FOR(THRE);
+                FLOWCTL_WAIT_FOR(CTS);
+
+                ch = *p++;
+                if (ch == 0x0a) {
+                        GDBPORT_SERIAL_TX = 0x0d;
+                        LSR_WAIT_FOR(THRE);
+                        FLOWCTL_WAIT_FOR(CTS);
+                }
+                GDBPORT_SERIAL_TX = ch;
+        }
+
+        FLOWCTL_CLEAR(DTR);
+}
+
+#endif /* !__ASSEMBLY__ */
+
+#endif /* CONFIG_GDBSTUB_ON_TTYSx */
+
+#define SERIAL_INITIALIZE                                       \
+do {                                                            \
+        /* release reset */                                     \
+        ASB2364_FPGA_REG_RESET_UART = 0x0001;                   \
+        SyncExBus();                                            \
+} while (0)
+
+#define SERIAL_CHECK_INTERRUPT                                  \
+do {                                                            \
+        if ((ASB2364_FPGA_REG_IRQ_UART & 0x0001) == 0x0001) {   \
+                return IRQ_NONE;                                \
+        }                                                       \
+} while (0)
+
+#define SERIAL_CLEAR_INTERRUPT                                  \
+do {                                                            \
+        ASB2364_FPGA_REG_IRQ_UART = 0x0001;                     \
+        SyncExBus();                                            \
+} while (0)
+
+#define SERIAL_SET_INT_MASK                                     \
+do {                                                            \
+        ASB2364_FPGA_REG_MASK_UART = 0x0001;                    \
+        SyncExBus();                                            \
+} while (0)
+
+#define SERIAL_CLEAR_INT_MASK                                   \
+do {                                                            \
+        ASB2364_FPGA_REG_MASK_UART = 0x0000;                    \
+        SyncExBus();                                            \
+} while (0)
+
+#endif /* _ASM_UNIT_SERIAL_H */