FreeCalypso > hg > fc-tourmaline

annotate src/gpf/osl/os_sem_ir.c @ 75:8697f358f505

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backlight rework: Condat light driver accepts levels The present change is another intermediate step on the path toward new FreeCalypso backlight handling. At this intermediate step the Condat light driver accepts 0-255 backlight levels driven by MFW, and puts them out on PWL on Luna development boards. At the same time on C139 it is now possible to turn on the display backlight with or without the keypad bl - the lsb of the 0-255 backlight level controls the keypad bl. MFW presently drives only 0 and 255 backlight levels, thus there is no visible behavioral change yet - but the plan for subsequent stages of this backlight rework is to add a dimmed backlight state (no keypad bl on C139) during active calls.
author Mychaela Falconia <falcon@freecalypso.org>
date Sat, 24 Oct 2020 20:44:04 +0000
parents 4e78acac3d88
children
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4e78acac3d88 src/{condat,cs,gpf,nucleus}: import from Selenite
Mychaela Falconia <falcon@freecalypso.org>
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1 /*
4e78acac3d88 src/{condat,cs,gpf,nucleus}: import from Selenite
Mychaela Falconia <falcon@freecalypso.org>
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2 * This C module is a reconstruction based on the disassembly of
4e78acac3d88 src/{condat,cs,gpf,nucleus}: import from Selenite
Mychaela Falconia <falcon@freecalypso.org>
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3 * os_sem.obj in frame_na7_db_ir.lib from the Leonardo package.
4e78acac3d88 src/{condat,cs,gpf,nucleus}: import from Selenite
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4 */
4e78acac3d88 src/{condat,cs,gpf,nucleus}: import from Selenite
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5
4e78acac3d88 src/{condat,cs,gpf,nucleus}: import from Selenite
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6 /* set of included headers from COFF symtab: */
4e78acac3d88 src/{condat,cs,gpf,nucleus}: import from Selenite
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7 #include <stdio.h>
4e78acac3d88 src/{condat,cs,gpf,nucleus}: import from Selenite
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8 #include <string.h>
4e78acac3d88 src/{condat,cs,gpf,nucleus}: import from Selenite
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9 #include "nucleus.h"
4e78acac3d88 src/{condat,cs,gpf,nucleus}: import from Selenite
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10 #include "typedefs.h"
4e78acac3d88 src/{condat,cs,gpf,nucleus}: import from Selenite
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11 #include "os.h"
4e78acac3d88 src/{condat,cs,gpf,nucleus}: import from Selenite
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12 #include "gdi.h"
4e78acac3d88 src/{condat,cs,gpf,nucleus}: import from Selenite
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13 #include "os_types.h"
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14 #include "os_glob.h"
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15
4e78acac3d88 src/{condat,cs,gpf,nucleus}: import from Selenite
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16 extern T_OS_SEM_TABLE_ENTRY SemTable[];
4e78acac3d88 src/{condat,cs,gpf,nucleus}: import from Selenite
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17 extern unsigned os_time_to_tick_multiplier;
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18
4e78acac3d88 src/{condat,cs,gpf,nucleus}: import from Selenite
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19 int
4e78acac3d88 src/{condat,cs,gpf,nucleus}: import from Selenite
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20 ReleaseSemaphoreCB(NU_SEMAPHORE *SemCB)
4e78acac3d88 src/{condat,cs,gpf,nucleus}: import from Selenite
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21 {
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22 if (NU_Release_Semaphore(SemCB) == NU_SUCCESS)
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23 return(OS_OK);
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24 else
4e78acac3d88 src/{condat,cs,gpf,nucleus}: import from Selenite
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25 return(OS_ERROR);
4e78acac3d88 src/{condat,cs,gpf,nucleus}: import from Selenite
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26 }
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27
4e78acac3d88 src/{condat,cs,gpf,nucleus}: import from Selenite
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28 GLOBAL LONG
4e78acac3d88 src/{condat,cs,gpf,nucleus}: import from Selenite
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29 os_ReleaseSemaphore(OS_HANDLE TaskHandle, OS_HANDLE SemHandle)
4e78acac3d88 src/{condat,cs,gpf,nucleus}: import from Selenite
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30 {
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31 if (NU_Release_Semaphore(&SemTable[SemHandle].SemCB) == NU_SUCCESS)
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32 return(OS_OK);
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33 else
4e78acac3d88 src/{condat,cs,gpf,nucleus}: import from Selenite
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34 return(OS_ERROR);
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35 }
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36
4e78acac3d88 src/{condat,cs,gpf,nucleus}: import from Selenite
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37 int
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38 ObtainSemaphoreCB(NU_SEMAPHORE *SemCB, ULONG Timeout, USHORT wait_check)
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39 {
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40 UNSIGNED nu_timeout;
4e78acac3d88 src/{condat,cs,gpf,nucleus}: import from Selenite
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41 STATUS sts;
4e78acac3d88 src/{condat,cs,gpf,nucleus}: import from Selenite
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42 int ret;
4e78acac3d88 src/{condat,cs,gpf,nucleus}: import from Selenite
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43
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44 ret = OS_OK;
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45 if (Timeout != OS_SUSPEND)
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46 nu_timeout = TIME_TO_SYSTEM_TICKS(Timeout);
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47 else if (wait_check == 1)
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48 nu_timeout = 1;
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49 else
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50 nu_timeout = NU_SUSPEND;
4e78acac3d88 src/{condat,cs,gpf,nucleus}: import from Selenite
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51 for (;;) {
4e78acac3d88 src/{condat,cs,gpf,nucleus}: import from Selenite
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52 sts = NU_Obtain_Semaphore(SemCB, nu_timeout);
4e78acac3d88 src/{condat,cs,gpf,nucleus}: import from Selenite
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53 switch (sts) {
4e78acac3d88 src/{condat,cs,gpf,nucleus}: import from Selenite
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54 case NU_SUCCESS:
4e78acac3d88 src/{condat,cs,gpf,nucleus}: import from Selenite
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55 return(ret);
4e78acac3d88 src/{condat,cs,gpf,nucleus}: import from Selenite
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56 case NU_INVALID_SEMAPHORE:
4e78acac3d88 src/{condat,cs,gpf,nucleus}: import from Selenite
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57 return(OS_ERROR);
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58 case NU_INVALID_SUSPEND:
4e78acac3d88 src/{condat,cs,gpf,nucleus}: import from Selenite
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59 nu_timeout = 0;
4e78acac3d88 src/{condat,cs,gpf,nucleus}: import from Selenite
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60 continue;
4e78acac3d88 src/{condat,cs,gpf,nucleus}: import from Selenite
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61 case NU_TIMEOUT:
4e78acac3d88 src/{condat,cs,gpf,nucleus}: import from Selenite
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62 case NU_UNAVAILABLE:
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63 if (nu_timeout == 1 && wait_check == 1) {
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64 nu_timeout = NU_SUSPEND;
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65 ret = OS_WAITED;
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66 continue;
4e78acac3d88 src/{condat,cs,gpf,nucleus}: import from Selenite
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67 }
4e78acac3d88 src/{condat,cs,gpf,nucleus}: import from Selenite
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68 return(OS_TIMEOUT);
4e78acac3d88 src/{condat,cs,gpf,nucleus}: import from Selenite
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69 default:
4e78acac3d88 src/{condat,cs,gpf,nucleus}: import from Selenite
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70 /*
4e78acac3d88 src/{condat,cs,gpf,nucleus}: import from Selenite
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71 * Disassembly reveals that the original code
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72 * has an endless loop here, the equivalent
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73 * of continue. My guess is that they simply
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74 * forgot the default case, and so control
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75 * falls onto the closing brace of the switch
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76 * and then onto the closing brace of the for
4e78acac3d88 src/{condat,cs,gpf,nucleus}: import from Selenite
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77 * loop. But I prefer better error handling,
4e78acac3d88 src/{condat,cs,gpf,nucleus}: import from Selenite
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78 * hence the present addition. - Space Falcon
4e78acac3d88 src/{condat,cs,gpf,nucleus}: import from Selenite
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79 */
4e78acac3d88 src/{condat,cs,gpf,nucleus}: import from Selenite
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80 return(OS_ERROR);
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81 }
4e78acac3d88 src/{condat,cs,gpf,nucleus}: import from Selenite
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82 }
4e78acac3d88 src/{condat,cs,gpf,nucleus}: import from Selenite
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83 }
4e78acac3d88 src/{condat,cs,gpf,nucleus}: import from Selenite
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84
4e78acac3d88 src/{condat,cs,gpf,nucleus}: import from Selenite
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85 GLOBAL LONG
4e78acac3d88 src/{condat,cs,gpf,nucleus}: import from Selenite
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86 os_ObtainSemaphore(OS_HANDLE TaskHandle, OS_HANDLE SemHandle, ULONG Timeout)
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87 {
4e78acac3d88 src/{condat,cs,gpf,nucleus}: import from Selenite
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88 if (SemHandle > MaxSemaphores)
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89 return(OS_ERROR);
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90 return ObtainSemaphoreCB(&SemTable[SemHandle].SemCB, Timeout, 0);
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91 }