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:
PXA2x0Console(MemoryManager * & mem)47           PXA2x0Console(MemoryManager *& mem) : _mem(mem), _uart_base(~0) { }
~PXA2x0Console()48           virtual ~PXA2x0Console() {
49                     if (_uart_base != ~0)
50                               _mem->unmapPhysicalPage(_uart_base);
51           }
52 
__tx_busy(void)53           void __tx_busy(void) {
54                     uint8_t reg;
55                     do
56                               reg = VOLATILE_REF8(_uart_base + 0x14);
57                     while (!(reg & 0x20));
58           }
59 
__clr_intr(void)60           void __clr_intr(void) {
61                     uint8_t reg = VOLATILE_REF8(_uart_base + 0x08);
62           }
63 
__putc(const char s)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:
init(void)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