FreeCalypso > hg > fc-magnetite

annotate src/g23m-gprs/cci/cci_gea_start.c @ 662:8cd8fd15a095

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SIM speed enhancement re-enabled and made configurable TI's original code supported SIM speed enhancement, but Openmoko had it disabled, and OM's disabling of speed enhancement somehow caused certain SIM cards to start working which didn't work before (OM's bug #666). Because our FC community is much smaller in year 2020 than OM's community was in their day, we are not able to find one of those #666-affected SIMs, thus the real issue they had encountered remains elusive. Thus our solution is to re-enable SIM speed enhancement and simply wait for if and when someone runs into a #666-affected SIM once again. We provide a SIM_allow_speed_enhancement global variable that allows SIM speed enhancement to be enabled or disabled per session, and an /etc/SIM_spenh file in FFS that allows it to enabled or disabled on a non-volatile basis. SIM speed enhancement is now enabled by default.
author Mychaela Falconia <falcon@freecalypso.org>
date Sun, 24 May 2020 05:02:28 +0000
parents 219afcfc6250
children
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1 /*
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2 +-----------------------------------------------------------------------------
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3 | Project :
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4 | Modul : cci_gea_start.c
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5 +-----------------------------------------------------------------------------
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6 | Copyright 2002 Texas Instruments Berlin, AG
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7 | All rights reserved.
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8 |
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9 | This file is confidential and a trade secret of Texas
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10 | Instruments Berlin, AG
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11 | The receipt of or possession of this file does not convey
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12 | any rights to reproduce or disclose its contents or to
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13 | manufacture, use, or sell anything it may describe, in
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14 | whole, or in part, without the specific written consent of
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15 | Texas Instruments Berlin, AG.
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16 +-----------------------------------------------------------------------------
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17 | Purpose : This module implements local functions for service FBS of
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18 | entity CCI.
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19 +-----------------------------------------------------------------------------
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20 */
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21
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22 #define CCI_GEA_START_C
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23
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24 #ifndef CCI_THREAD
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25 #define ENTITY_LLC
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26 #else
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27 #define ENTITY_CCI
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28 #endif
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29
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30
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31 /*==== INCLUDES =============================================================*/
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32
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33 #include "typedefs.h" /* to get Condat data types */
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34 #include "vsi.h" /* to get a lot of macros */
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35 #include "macdef.h"
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36 #include "gprs.h"
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37 #include "gsm.h" /* to get a lot of macros */
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38 #include "cnf_llc.h" /* to get cnf-definitions */
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39 #include "mon_llc.h" /* to get mon-definitions */
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40 #include "prim.h" /* to get the definitions of used SAP and directions */
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41 #include "cci.h" /* to get the global entity definitions */
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42 #ifndef CCI_THREAD
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43 #include "llc.h" /* to get the global entity definitions */
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44 #endif
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45
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46 #ifndef _SIMULATION_
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47 #include "config/chipset.cfg"
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48 #endif /* ifdef SIMULATION */
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49
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50
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51 /*==== CONST ================================================================*/
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52
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53 /*==== LOCAL VARS ===========================================================*/
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54
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55 /*==== PRIVATE FUNCTIONS ====================================================*/
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56
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57 /*==== PUBLIC FUNCTIONS =====================================================*/
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58
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59
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60 /*
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61 +------------------------------------------------------------------------------
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62 | Function : gea_start
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63 +------------------------------------------------------------------------------
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64 | Description : The function ....
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65 |
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66 | Parameters : void
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67 |
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68 +------------------------------------------------------------------------------
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69 */
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70
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71
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72 /* GEA work-around only affects Calypso+ chipset. */
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73 #ifndef CCI_FLASH_ROM
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74 /* Assembly routine gea_start() should be executed from the Internal RAM */
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75 void gea_start(void){
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76 #if (CHIPSET == 12) || (CHIPSET == 14)
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77 /* Enable Timer1 clock */
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78 *(volatile USHORT *) 0xfffe3800 |= 0x0020;
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79
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80 /* Save into the stack ARM registers r0 to r4 */
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81 asm(" push {r0-r4}");
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82
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83 /* Load in r0 READ_TIMER1 address */
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84 asm(" ldr r0, READ_TIMER1_ADDR");
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85
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86 /* Set bit START in GEA_CNTL register */
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87 asm(" ldr r1, GEA_CNTL_ADDR");
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88 asm(" mov r4,#4");
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89 asm(" ldrh r2, [r1]");
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90 asm(" orr r2,r4");
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91 asm(" strh r2,[r1]");
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92
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93 /* Load Timer1 in r3 in order to prevent DMA access on strobe0 during the
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94 GEA clock switch. This reading of Timer1 generates around 13 cycles of
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95 MCU clock activity on strobe1 and so guaranties that strobe0 will be
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96 quiet during that time. */
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97 asm(" ldrh r3,[r0]");
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98
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99 /* Restore ARM registers r0 to r4 from the stack */
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100 asm(" pop {r0-r4}");
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101
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102 /* Branch to end of the function, to avoid that the 2 following constant
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103 definitions are mistaken with code instructions. */
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104 asm(" br $gea_end_func");
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105
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106 /* Must be defined inside the function body, else depending on the compiler
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107 version, they are not inserted in the right section */
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108 asm("READ_TIMER1_ADDR .long 0xFFFE3804");
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109 asm("GEA_CNTL_ADDR .long 0xffffc000");
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110
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111 asm("$gea_end_func:");
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112 }
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113 #else
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114 }
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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115 #endif /*(CHIPSET == 12)*/
219afcfc6250 src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
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116
219afcfc6250 src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
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117 #endif /* CCI_FLASH_ROM */
219afcfc6250 src/g23m-gprs: initial import from TCS3.2/LoCosto
Mychaela Falconia <falcon@freecalypso.org>
parents:
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118