1 | /* |
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2 | * hw_init.c: set up sh7045F internal subunits |
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3 | * Pin and memory assignments assume |
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4 | * target is Hitachi SH7045F EVB ("lcevb") |
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5 | * |
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6 | * Provides two initialization routines: |
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7 | * A. 'void early_hw_init(void)' for 'start.S' |
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8 | * sets up hw needed for early RTEMS boot, and |
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9 | * B. 'void bsp_hw_init(void)' for 'bspstart.c' |
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10 | * sets up hardware used by this BSP. |
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11 | * |
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12 | * Author: John M. Mills (jmills@tga.com) |
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13 | * COPYRIGHT(c) 2000, TGA Technologies, Inc |
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14 | * Norcross, GA 30071 U.S.A |
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15 | * |
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16 | * This program is distributed in the hope that it will be useful, |
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17 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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18 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. |
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19 | * |
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20 | * |
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21 | * The license and distribution terms for this file may be |
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22 | * found in the file LICENSE in this distribution or at |
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23 | * http://www.OARcorp.com/rtems/license.html. |
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24 | * |
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25 | * Adapted from Hitachi EVB7045F tutorial files by: |
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26 | * John M. Mills (jmills@tga.com) |
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27 | * TGA Technologies, Inc. |
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28 | * 100 Pinnacle Way, Suite 140 |
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29 | * Norcross, GA 30071 U.S.A. |
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30 | * |
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31 | * |
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32 | * This file may be copied and distributed in accordance |
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33 | * the above-referenced license. It is provided for critique and |
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34 | * developmental purposes without any warranty nor representation |
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35 | * by the authors or by TGA Technologies. |
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36 | * |
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37 | * $Id$ |
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38 | */ |
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39 | |
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40 | #include <bsp.h> |
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41 | |
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42 | #include <stdlib.h> |
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43 | |
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44 | #include <rtems/libio.h> |
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45 | #include <iosupp.h> |
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46 | #include <rtems/score/sh_io.h> |
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47 | #include <rtems/score/iosh7045.h> |
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48 | |
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49 | /* exported entries */ |
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50 | extern void bsp_hw_init (void); |
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51 | extern void early_hw_init (void); |
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52 | |
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53 | /* called from 'start.S' on "#ifdef START_HW_INIT" */ |
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54 | void early_hw_init (void) |
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55 | { |
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56 | #ifdef STANDALONE_EVB |
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57 | /* STANDALONE_EVB minimally sets up bus and DRAM here */ |
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58 | /* no STANDALONE_EVB accepts defaults from debug monitor */ |
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59 | |
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60 | /* FIXME: replace 'magic numbers' with logical names */ |
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61 | |
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62 | write16(0x2020, BSC_BCR1); /* Bus width access - 32-bit on CS1 */ |
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63 | write16(0xF3DD, BSC_BCR2); /* Idle cycles CS3-CS0 - 0 idle cycles*/ |
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64 | write16(0xFF3F, BSC_WCR1); /* Waits for CS3-CS0 - 3 waits on CS1 */ |
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65 | write16(0x000F, BSC_WCR2); /* Waits for DRAM/DMA access - default */ |
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66 | write16(0x0000, BSC_DCR); /* DRAM control - default */ |
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67 | write16(0x0000, BSC_RTCSR); /* DRAM refresh - default */ |
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68 | write16(0x0000, BSC_RTCNT); /* DRAM refresh counter - default*/ |
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69 | write16(0x0000, BSC_RTCOR); /* DRAM refresh compare match - default */ |
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70 | #endif |
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71 | |
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72 | /* add early-init functions here */ |
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73 | |
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74 | }; |
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75 | |
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76 | /* to be called from 'bspstart.c' */ |
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77 | void bsp_hw_init (void) |
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78 | { |
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79 | int a; |
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80 | unsigned8 temp8; |
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81 | unsigned16 temp16; |
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82 | |
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83 | #ifdef STANDALONE_EVB |
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84 | /* STANDALONE_EVB: sets up PFC */ |
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85 | /* no STANDALONE_EVB: accepts defaults, adds RESET */ |
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86 | |
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87 | /* FIXME: replace 'magic numbers' */ |
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88 | |
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89 | write16(0x5000, PFC_PACRH); /* Pin function controller - WRHH, WRHL */ |
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90 | write16(0x1550, PFC_PACRL1); /* Pin fun. controller - WRH,WRL,RD,CS1 */ |
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91 | write16(0x0000, PFC_PBCR1); /* Pin function controller - default */ |
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92 | write16(0x2005, PFC_PBCR2); /* Pin fcn. controller - A18,A17,A16 */ |
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93 | write16(0xFFFF, PFC_PCCR); /* Pin function controller - A15-A0 */ |
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94 | write16(0x5555, PFC_PDCRH1); /* Pin function controller - D31-D24 */ |
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95 | write16(0x5555, PFC_PDCRH2); /* Pin function controller - D23-D16 */ |
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96 | write16(0xFFFF, PFC_PDCRL); /* Pin function controller - D15-D0 */ |
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97 | write16(0x0000, PFC_IFCR); /* Pin function controller - default */ |
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98 | write16(0x0000, PFC_PACRL2); /* default disconnects all I/O pins;*/ |
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99 | /* [re-connected by DEVICE_open()] */ |
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100 | #endif |
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101 | |
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102 | /* default hardware setup for SH7045F EVB */ |
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103 | |
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104 | /* PFC: General I/O except pin 13 (reset): */ |
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105 | temp16 = read16(PFC_PECR1); |
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106 | temp16 |= 0x0800; |
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107 | write16(temp16, PFC_PECR1); |
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108 | |
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109 | /* All I/O lines bits 7-0: */ |
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110 | write16(0x00, PFC_PECR2); |
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111 | |
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112 | /* P5 (LED) out, all other pins in: */ |
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113 | temp16 = read16(PFC_PEIOR); |
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114 | temp16 |= 0x0020; |
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115 | write16(temp16, PFC_PEIOR); |
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116 | |
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117 | } |
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