1 /*

     2 * Copyright (c) 2008-2009 Nokia Corporation and/or its subsidiary(-ies).

     3 * All rights reserved.

     4 * This component and the accompanying materials are made available

     5 * under the terms of "Eclipse Public License v1.0"

     6 * which accompanies this distribution, and is available

     7 * at the URL "http://www.eclipse.org/legal/epl-v10.html".

     8 *

     9 * Initial Contributors:

    10 * Nokia Corporation - initial contribution.

    11 *

    12 * Contributors:

    13 *

    14 * Description:  

    15 * naviengine_assp\uart\uart16550.cia

    16 * PDD for 16550 UART - ARM assembler bits

    17 *

    18 */

    19 

    20 

    21 

    22 #include <comm.h>

    23 #include <assp.h>

    24 #include "uart16550_ne.h"

    25 #include <e32hal.h>

    26 

    27 __NAKED__ void T16550Uart::ModifyFCR(TUint /*aClearMask*/, TUint /*aSetMask*/)

    28 	{

    29 	asm("mrs ip, cpsr ");

    30 	asm("orr r3, ip, #0xc0 ");

    31 	asm("msr cpsr, r3 ");

    32 	asm("ldrb r3, [r0, #4] ");

    33 	asm("bic r3, r3, r1 ");

    34 	asm("ldr r1, [r0, #0] ");

    35 	asm("orr r3, r3, r2 ");

    36 	asm("strb r3, [r0, #4] ");

    37 	asm("strb r3, [r1, #%a0]" : : "i" ((TInt)K16550FCROffset));

    38 	asm("msr cpsr, ip ");

    39 	__JUMP(,lr);

    40 	}

    41 

    42 __NAKED__ void T16550Uart::ModifyLCR(TUint /*aClearMask*/, TUint /*aSetMask*/)

    43 	{

    44 	asm("mrs ip, cpsr ");

    45 	asm("orr r3, ip, #0xc0 ");

    46 	asm("msr cpsr, r3 ");

    47 	asm("ldrb r3, [r0, #5] ");

    48 	asm("bic r3, r3, r1 ");

    49 	asm("ldr r1, [r0, #0] ");

    50 	asm("orr r3, r3, r2 ");

    51 	asm("strb r3, [r0, #5] ");

    52 	asm("strb r3, [r1, #%a0]" : : "i" ((TInt)K16550LCROffset));

    53 	asm("msr cpsr, ip ");

    54 	__JUMP(,lr);

    55 	}

    56 

    57 __NAKED__ void T16550Uart::ModifyMCR(TUint /*aClearMask*/, TUint /*aSetMask*/)

    58 	{

    59 	asm("mrs ip, cpsr ");

    60 	asm("orr r3, ip, #0xc0 ");

    61 	asm("msr cpsr, r3 ");

    62 	asm("ldrb r3, [r0, #6] ");

    63 	asm("bic r3, r3, r1 ");

    64 	asm("ldr r1, [r0, #0] ");

    65 	asm("orr r3, r3, r2 ");

    66 	asm("strb r3, [r0, #6] ");

    67 	asm("strb r3, [r1, #%a0]" : : "i" ((TInt)K16550MCROffset));

    68 	asm("msr cpsr, ip ");

    69 	__JUMP(,lr);

    70 	}

    71 

    72 __NAKED__ void T16550Uart::ModifyIER(TUint /*aClearMask*/, TUint /*aSetMask*/)

    73 	{

    74 	asm("mrs ip, cpsr ");

    75 	asm("orr r3, ip, #0xc0 ");

    76 	asm("msr cpsr, r3 ");

    77 	asm("ldrb r3, [r0, #7] ");

    78 	asm("bic r3, r3, r1 ");

    79 	asm("ldr r1, [r0, #0] ");

    80 	asm("orr r3, r3, r2 ");

    81 	asm("strb r3, [r0, #7] ");

    82 	asm("strb r3, [r1, #%a0]" : : "i" ((TInt)K16550IEROffset));

    83 	asm("msr cpsr, ip ");

    84 	__JUMP(,lr);

    85 	}

    86 

    87 __NAKED__ void T16550Uart::SetFCR(TUint /*aValue*/)

    88 	{

    89 	asm("mrs ip, cpsr ");

    90 	asm("ldr r3, [r0, #0] ");

    91 	asm("orr r2, ip, #0xc0 ");

    92 	asm("msr cpsr, r2 ");

    93 	asm("strb r1, [r0, #4] ");

    94 	asm("strb r1, [r3, #%a0]" : : "i" ((TInt)K16550FCROffset));

    95 	asm("msr cpsr, ip ");

    96 	__JUMP(,lr);

    97 	}

    98 

    99 __NAKED__ void T16550Uart::SetLCR(TUint /*aValue*/)

   100 	{

   101 	asm("mrs ip, cpsr ");

   102 	asm("ldr r3, [r0, #0] ");

   103 	asm("orr r2, ip, #0xc0 ");

   104 	asm("msr cpsr, r2 ");

   105 	asm("strb r1, [r0, #5] ");

   106 	asm("strb r1, [r3, #%a0]" : : "i" ((TInt)K16550LCROffset));

   107 	asm("msr cpsr, ip ");

   108 	__JUMP(,lr);

   109 	}

   110 

   111 __NAKED__ void T16550Uart::SetMCR(TUint /*aValue*/)

   112 	{

   113 	asm("mrs ip, cpsr ");

   114 	asm("ldr r3, [r0, #0] ");

   115 	asm("orr r2, ip, #0xc0 ");

   116 	asm("msr cpsr, r2 ");

   117 	asm("strb r1, [r0, #6] ");

   118 	asm("strb r1, [r3, #%a0]" : : "i" ((TInt)K16550MCROffset));

   119 	asm("msr cpsr, ip ");

   120 	__JUMP(,lr);

   121 	}

   122 

   123 __NAKED__ void T16550Uart::SetIER(TUint /*aValue*/)

   124 	{

   125 	asm("mrs ip, cpsr ");

   126 	asm("ldr r3, [r0, #0] ");

   127 	asm("orr r2, ip, #0xc0 ");

   128 	asm("msr cpsr, r2 ");

   129 	asm("strb r1, [r0, #7] ");

   130 	asm("strb r1, [r3, #%a0]" : : "i" ((TInt)K16550IEROffset));

   131 	asm("msr cpsr, ip ");

   132 	__JUMP(,lr);

   133 	}