1 // Copyright (c) 1998-2009 Nokia Corporation and/or its subsidiary(-ies).

     2 // All rights reserved.

     3 // This component and the accompanying materials are made available

     4 // under the terms of the License "Eclipse Public License v1.0"

     5 // which accompanies this distribution, and is available

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

     7 //

     8 // Initial Contributors:

     9 // Nokia Corporation - initial contribution.

    10 //

    11 // Contributors:

    12 //

    13 // Description:

    14 // e32\drivers\ecomm\arm\uart16550.cia

    15 // PDD for 16550 UART - ARM assembler bits

    16 // 

    17 //

    18 

    19 #include <comm.h>

    20 #include <assp.h>

    21 #include <var_defs.h>

    22 #include <uart16550.h>

    23 #include <e32hal.h>

    24 

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

    26 	{

    27 	asm("mrs ip, cpsr ");

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

    29 	asm("msr cpsr, r3 ");

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

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

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

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

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

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

    36 	asm("msr cpsr, ip ");

    37 	__JUMP(,lr);

    38 	}

    39 

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

    41 	{

    42 	asm("mrs ip, cpsr ");

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

    44 	asm("msr cpsr, r3 ");

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

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

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

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

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

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

    51 	asm("msr cpsr, ip ");

    52 	__JUMP(,lr);

    53 	}

    54 

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

    56 	{

    57 	asm("mrs ip, cpsr ");

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

    59 	asm("msr cpsr, r3 ");

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

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

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

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

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

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

    66 	asm("msr cpsr, ip ");

    67 	__JUMP(,lr);

    68 	}

    69 

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

    71 	{

    72 	asm("mrs ip, cpsr ");

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

    74 	asm("msr cpsr, r3 ");

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

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

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

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

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

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

    81 	asm("msr cpsr, ip ");

    82 	__JUMP(,lr);

    83 	}

    84 

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

    86 	{

    87 	asm("mrs ip, cpsr ");

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

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

    90 	asm("msr cpsr, r2 ");

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

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

    93 	asm("msr cpsr, ip ");

    94 	__JUMP(,lr);

    95 	}

    96 

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

    98 	{

    99 	asm("mrs ip, cpsr ");

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

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

   102 	asm("msr cpsr, r2 ");

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

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

   105 	asm("msr cpsr, ip ");

   106 	__JUMP(,lr);

   107 	}

   108 

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

   110 	{

   111 	asm("mrs ip, cpsr ");

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

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

   114 	asm("msr cpsr, r2 ");

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

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

   117 	asm("msr cpsr, ip ");

   118 	__JUMP(,lr);

   119 	}

   120 

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

   122 	{

   123 	asm("mrs ip, cpsr ");

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

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

   126 	asm("msr cpsr, r2 ");

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

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

   129 	asm("msr cpsr, ip ");

   130 	__JUMP(,lr);

   131 	}