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      1 /* -*-C++-*-	$NetBSD: arm_pxa2x0_console.h,v 1.1 2008/03/08 02:26:03 rafal Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 2008 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Rafal K. Boni.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  * POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 #ifndef _HPCBOOT_ARM_PXA2X0_CONSOLE_H_
     33 #define _HPCBOOT_ARM_PXA2X0_CONSOLE_H_
     34 
     35 #include <hpcboot.h>
     36 #include <memory.h>
     37 #include <arm/arm_console.h>
     38 
     39 class PXA2x0Console : public ARMConsole {
     40 	friend class ARMConsole;
     41 
     42 private:
     43 	MemoryManager *&_mem;
     44 	vaddr_t _uart_base;
     45 
     46 private:
     47 	PXA2x0Console(MemoryManager *& mem) : _mem(mem), _uart_base(~0) { }
     48 	virtual ~PXA2x0Console() {
     49 		if (_uart_base != ~0)
     50 			_mem->unmapPhysicalPage(_uart_base);
     51 	}
     52 
     53 	void __tx_busy(void) {
     54 		uint8_t reg;
     55 		do
     56 			reg = VOLATILE_REF8(_uart_base + 0x14);
     57 		while (!(reg & 0x20));
     58 	}
     59 
     60 	void __clr_intr(void) {
     61 		uint8_t reg = VOLATILE_REF8(_uart_base + 0x08);
     62 	}
     63 
     64 	virtual void __putc(const char s) {
     65 		__tx_busy(); // wait until previous transmit done.
     66 		VOLATILE_REF8(_uart_base + 0x00) =
     67 		    static_cast <uint8_t>(0xff & s);
     68 		__tx_busy();  // wait until this transmit done.
     69 		__clr_intr(); // clear interrupt register
     70 	}
     71 
     72 public:
     73 	virtual BOOL init(void) {
     74 		if (!SerialConsole::init())
     75 			return FALSE;
     76 
     77 		_uart_base =
     78 		    _mem->mapPhysicalPage(0x40100000, 0x100, PAGE_READWRITE);
     79 
     80 		if (_uart_base == ~0)
     81 			return FALSE;
     82 
     83 		return TRUE;
     84 	}
     85 };
     86 #endif //_HPCBOOT_ARM_PXA2X0_CONSOLE_H_
     87