368dd5acd1
Implement the Panasonic MN10300 AM34 CPU subarch and implement SMP support for MN10300. Also implement support for the MN2WS0060 processor and the ASB2364 evaluation board which are AM34 based. Signed-off-by: Akira Takeuchi <takeuchi.akr@jp.panasonic.com> Signed-off-by: Kiyoshi Owada <owada.kiyoshi@jp.panasonic.com> Signed-off-by: David Howells <dhowells@redhat.com>
125 lines
3.6 KiB
C
125 lines
3.6 KiB
C
/* ASB2305-specific 8250 serial ports
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*
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* Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
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* Written by David Howells (dhowells@redhat.com)
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public Licence
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* as published by the Free Software Foundation; either version
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* 2 of the Licence, or (at your option) any later version.
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*/
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#ifndef _ASM_UNIT_SERIAL_H
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#define _ASM_UNIT_SERIAL_H
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#include <asm/cpu-regs.h>
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#include <proc/irq.h>
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#include <linux/serial_reg.h>
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#define SERIAL_PORT0_BASE_ADDRESS 0xA6FB0000
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#define ASB2305_DEBUG_MCR __SYSREG(0xA6FB0000 + UART_MCR * 2, u8)
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#define SERIAL_IRQ XIRQ0 /* Dual serial (PC16552) (Hi) */
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/*
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* The ASB2305 has an 18.432 MHz clock the UART
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*/
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#define BASE_BAUD (18432000 / 16)
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/*
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* dispose of the /dev/ttyS0 serial port
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*/
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#ifndef CONFIG_GDBSTUB_ON_TTYSx
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#define SERIAL_PORT_DFNS \
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{ \
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.baud_base = BASE_BAUD, \
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.irq = SERIAL_IRQ, \
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.flags = STD_COM_FLAGS, \
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.iomem_base = (u8 *) SERIAL_PORT0_BASE_ADDRESS, \
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.iomem_reg_shift = 2, \
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.io_type = SERIAL_IO_MEM, \
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},
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#ifndef __ASSEMBLY__
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static inline void __debug_to_serial(const char *p, int n)
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{
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}
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#endif /* !__ASSEMBLY__ */
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#else /* CONFIG_GDBSTUB_ON_TTYSx */
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#define SERIAL_PORT_DFNS /* stolen by gdb-stub */
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#if defined(CONFIG_GDBSTUB_ON_TTYS0)
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#define GDBPORT_SERIAL_RX __SYSREG(SERIAL_PORT0_BASE_ADDRESS + UART_RX * 4, u8)
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#define GDBPORT_SERIAL_TX __SYSREG(SERIAL_PORT0_BASE_ADDRESS + UART_TX * 4, u8)
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#define GDBPORT_SERIAL_DLL __SYSREG(SERIAL_PORT0_BASE_ADDRESS + UART_DLL * 4, u8)
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#define GDBPORT_SERIAL_DLM __SYSREG(SERIAL_PORT0_BASE_ADDRESS + UART_DLM * 4, u8)
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#define GDBPORT_SERIAL_IER __SYSREG(SERIAL_PORT0_BASE_ADDRESS + UART_IER * 4, u8)
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#define GDBPORT_SERIAL_IIR __SYSREG(SERIAL_PORT0_BASE_ADDRESS + UART_IIR * 4, u8)
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#define GDBPORT_SERIAL_FCR __SYSREG(SERIAL_PORT0_BASE_ADDRESS + UART_FCR * 4, u8)
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#define GDBPORT_SERIAL_LCR __SYSREG(SERIAL_PORT0_BASE_ADDRESS + UART_LCR * 4, u8)
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#define GDBPORT_SERIAL_MCR __SYSREG(SERIAL_PORT0_BASE_ADDRESS + UART_MCR * 4, u8)
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#define GDBPORT_SERIAL_LSR __SYSREG(SERIAL_PORT0_BASE_ADDRESS + UART_LSR * 4, u8)
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#define GDBPORT_SERIAL_MSR __SYSREG(SERIAL_PORT0_BASE_ADDRESS + UART_MSR * 4, u8)
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#define GDBPORT_SERIAL_SCR __SYSREG(SERIAL_PORT0_BASE_ADDRESS + UART_SCR * 4, u8)
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#define GDBPORT_SERIAL_IRQ SERIAL_IRQ
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#elif defined(CONFIG_GDBSTUB_ON_TTYS1)
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#error The ASB2305 doesnt have a /dev/ttyS1
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#endif
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#ifndef __ASSEMBLY__
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#define TTYS0_TX __SYSREG(SERIAL_PORT0_BASE_ADDRESS + UART_TX * 4, u8)
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#define TTYS0_MCR __SYSREG(SERIAL_PORT0_BASE_ADDRESS + UART_MCR * 4, u8)
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#define TTYS0_LSR __SYSREG(SERIAL_PORT0_BASE_ADDRESS + UART_LSR * 4, u8)
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#define TTYS0_MSR __SYSREG(SERIAL_PORT0_BASE_ADDRESS + UART_MSR * 4, u8)
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#define LSR_WAIT_FOR(STATE) \
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do { \
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while (!(TTYS0_LSR & UART_LSR_##STATE)) {} \
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} while (0)
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#define FLOWCTL_WAIT_FOR(LINE) \
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do { \
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while (!(TTYS0_MSR & UART_MSR_##LINE)) {} \
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} while (0)
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#define FLOWCTL_CLEAR(LINE) \
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do { \
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TTYS0_MCR &= ~UART_MCR_##LINE; \
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} while (0)
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#define FLOWCTL_SET(LINE) \
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do { \
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TTYS0_MCR |= UART_MCR_##LINE; \
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} while (0)
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#define FLOWCTL_QUERY(LINE) ({ TTYS0_MSR & UART_MSR_##LINE; })
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static inline void __debug_to_serial(const char *p, int n)
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{
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char ch;
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FLOWCTL_SET(DTR);
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for (; n > 0; n--) {
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LSR_WAIT_FOR(THRE);
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FLOWCTL_WAIT_FOR(CTS);
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ch = *p++;
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if (ch == 0x0a) {
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TTYS0_TX = 0x0d;
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LSR_WAIT_FOR(THRE);
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FLOWCTL_WAIT_FOR(CTS);
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}
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TTYS0_TX = ch;
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}
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FLOWCTL_CLEAR(DTR);
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}
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#endif /* !__ASSEMBLY__ */
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#endif /* CONFIG_GDBSTUB_ON_TTYSx */
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#endif /* _ASM_UNIT_SERIAL_H */
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