1 |
3 |
xianfeng |
/*
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* Written by Martin Kolinek, February 1996
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*
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* Changes:
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*
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* Chris Beauregard July 28th, 1996
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* - Fixed up integrated SCSI detection
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*
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* Chris Beauregard August 3rd, 1996
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* - Made mca_info local
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* - Made integrated registers accessible through standard function calls
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* - Added name field
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* - More sanity checking
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*
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* Chris Beauregard August 9th, 1996
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* - Rewrote /proc/mca
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*
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* Chris Beauregard January 7th, 1997
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* - Added basic NMI-processing
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* - Added more information to mca_info structure
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*
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* David Weinehall October 12th, 1998
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* - Made a lot of cleaning up in the source
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* - Added use of save_flags / restore_flags
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* - Added the 'driver_loaded' flag in MCA_adapter
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* - Added an alternative implemention of ZP Gu's mca_find_unused_adapter
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*
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* David Weinehall March 24th, 1999
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* - Fixed the output of 'Driver Installed' in /proc/mca/pos
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30 |
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* - Made the Integrated Video & SCSI show up even if they have id 0000
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*
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* Alexander Viro November 9th, 1999
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* - Switched to regular procfs methods
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*
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* Alfred Arnold & David Weinehall August 23rd, 2000
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* - Added support for Planar POS-registers
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*/
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#include <linux/module.h>
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#include <linux/types.h>
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41 |
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#include <linux/errno.h>
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42 |
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#include <linux/kernel.h>
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43 |
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#include <linux/mca.h>
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#include <linux/kprobes.h>
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#include <asm/system.h>
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#include <asm/io.h>
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#include <linux/proc_fs.h>
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#include <linux/mman.h>
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49 |
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#include <linux/mm.h>
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#include <linux/pagemap.h>
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#include <linux/ioport.h>
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52 |
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#include <asm/uaccess.h>
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#include <linux/init.h>
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#include <asm/arch_hooks.h>
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55 |
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56 |
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static unsigned char which_scsi = 0;
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57 |
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int MCA_bus = 0;
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59 |
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EXPORT_SYMBOL(MCA_bus);
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60 |
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61 |
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/*
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62 |
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* Motherboard register spinlock. Untested on SMP at the moment, but
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63 |
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* are there any MCA SMP boxes?
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64 |
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*
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65 |
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* Yes - Alan
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66 |
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*/
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67 |
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static DEFINE_SPINLOCK(mca_lock);
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68 |
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69 |
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/* Build the status info for the adapter */
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70 |
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71 |
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static void mca_configure_adapter_status(struct mca_device *mca_dev) {
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mca_dev->status = MCA_ADAPTER_NONE;
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73 |
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74 |
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mca_dev->pos_id = mca_dev->pos[0]
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75 |
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+ (mca_dev->pos[1] << 8);
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76 |
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77 |
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if(!mca_dev->pos_id && mca_dev->slot < MCA_MAX_SLOT_NR) {
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78 |
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79 |
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/* id = 0x0000 usually indicates hardware failure,
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80 |
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* however, ZP Gu (zpg@castle.net> reports that his 9556
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81 |
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* has 0x0000 as id and everything still works. There
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82 |
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* also seem to be an adapter with id = 0x0000; the
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83 |
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* NCR Parallel Bus Memory Card. Until this is confirmed,
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84 |
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* however, this code will stay.
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85 |
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*/
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86 |
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87 |
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mca_dev->status = MCA_ADAPTER_ERROR;
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88 |
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89 |
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return;
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90 |
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} else if(mca_dev->pos_id != 0xffff) {
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91 |
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92 |
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/* 0xffff usually indicates that there's no adapter,
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93 |
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* however, some integrated adapters may have 0xffff as
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94 |
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* their id and still be valid. Examples are on-board
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95 |
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* VGA of the 55sx, the integrated SCSI of the 56 & 57,
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96 |
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* and possibly also the 95 ULTIMEDIA.
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97 |
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*/
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98 |
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99 |
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mca_dev->status = MCA_ADAPTER_NORMAL;
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}
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102 |
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if((mca_dev->pos_id == 0xffff ||
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mca_dev->pos_id == 0x0000) && mca_dev->slot >= MCA_MAX_SLOT_NR) {
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104 |
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int j;
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105 |
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106 |
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for(j = 2; j < 8; j++) {
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107 |
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if(mca_dev->pos[j] != 0xff) {
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mca_dev->status = MCA_ADAPTER_NORMAL;
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break;
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110 |
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}
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111 |
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}
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112 |
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}
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113 |
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114 |
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if(!(mca_dev->pos[2] & MCA_ENABLED)) {
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115 |
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116 |
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/* enabled bit is in POS 2 */
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117 |
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118 |
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mca_dev->status = MCA_ADAPTER_DISABLED;
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119 |
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}
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120 |
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} /* mca_configure_adapter_status */
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121 |
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/*--------------------------------------------------------------------*/
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123 |
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static struct resource mca_standard_resources[] = {
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125 |
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{ .start = 0x60, .end = 0x60, .name = "system control port B (MCA)" },
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126 |
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{ .start = 0x90, .end = 0x90, .name = "arbitration (MCA)" },
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127 |
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{ .start = 0x91, .end = 0x91, .name = "card Select Feedback (MCA)" },
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128 |
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{ .start = 0x92, .end = 0x92, .name = "system Control port A (MCA)" },
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129 |
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{ .start = 0x94, .end = 0x94, .name = "system board setup (MCA)" },
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130 |
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{ .start = 0x96, .end = 0x97, .name = "POS (MCA)" },
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131 |
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{ .start = 0x100, .end = 0x107, .name = "POS (MCA)" }
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132 |
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};
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133 |
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134 |
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#define MCA_STANDARD_RESOURCES ARRAY_SIZE(mca_standard_resources)
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135 |
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136 |
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/**
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137 |
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* mca_read_and_store_pos - read the POS registers into a memory buffer
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138 |
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* @pos: a char pointer to 8 bytes, contains the POS register value on
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139 |
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* successful return
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140 |
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*
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141 |
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* Returns 1 if a card actually exists (i.e. the pos isn't
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142 |
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* all 0xff) or 0 otherwise
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143 |
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*/
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144 |
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static int mca_read_and_store_pos(unsigned char *pos) {
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145 |
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int j;
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146 |
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int found = 0;
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147 |
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148 |
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for(j=0; j<8; j++) {
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149 |
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if((pos[j] = inb_p(MCA_POS_REG(j))) != 0xff) {
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150 |
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/* 0xff all across means no device. 0x00 means
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151 |
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* something's broken, but a device is
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* probably there. However, if you get 0x00
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* from a motherboard register it won't matter
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154 |
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* what we find. For the record, on the
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* 57SLC, the integrated SCSI adapter has
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156 |
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* 0xffff for the adapter ID, but nonzero for
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157 |
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* other registers. */
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found = 1;
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}
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161 |
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}
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162 |
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return found;
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163 |
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}
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164 |
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165 |
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static unsigned char mca_pc_read_pos(struct mca_device *mca_dev, int reg)
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166 |
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{
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167 |
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unsigned char byte;
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168 |
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unsigned long flags;
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169 |
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170 |
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if(reg < 0 || reg >= 8)
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171 |
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return 0;
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172 |
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173 |
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spin_lock_irqsave(&mca_lock, flags);
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174 |
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if(mca_dev->pos_register) {
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175 |
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/* Disable adapter setup, enable motherboard setup */
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176 |
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177 |
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outb_p(0, MCA_ADAPTER_SETUP_REG);
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178 |
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outb_p(mca_dev->pos_register, MCA_MOTHERBOARD_SETUP_REG);
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179 |
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180 |
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byte = inb_p(MCA_POS_REG(reg));
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181 |
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outb_p(0xff, MCA_MOTHERBOARD_SETUP_REG);
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182 |
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} else {
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183 |
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184 |
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/* Make sure motherboard setup is off */
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185 |
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186 |
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outb_p(0xff, MCA_MOTHERBOARD_SETUP_REG);
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187 |
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188 |
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/* Read the appropriate register */
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189 |
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190 |
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outb_p(0x8|(mca_dev->slot & 0xf), MCA_ADAPTER_SETUP_REG);
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191 |
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byte = inb_p(MCA_POS_REG(reg));
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192 |
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outb_p(0, MCA_ADAPTER_SETUP_REG);
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193 |
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}
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194 |
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spin_unlock_irqrestore(&mca_lock, flags);
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195 |
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|
196 |
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mca_dev->pos[reg] = byte;
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197 |
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198 |
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return byte;
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199 |
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}
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200 |
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|
201 |
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static void mca_pc_write_pos(struct mca_device *mca_dev, int reg,
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202 |
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unsigned char byte)
|
203 |
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{
|
204 |
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unsigned long flags;
|
205 |
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|
206 |
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if(reg < 0 || reg >= 8)
|
207 |
|
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return;
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208 |
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|
209 |
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spin_lock_irqsave(&mca_lock, flags);
|
210 |
|
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|
211 |
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/* Make sure motherboard setup is off */
|
212 |
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|
213 |
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outb_p(0xff, MCA_MOTHERBOARD_SETUP_REG);
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214 |
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215 |
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/* Read in the appropriate register */
|
216 |
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|
217 |
|
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outb_p(0x8|(mca_dev->slot&0xf), MCA_ADAPTER_SETUP_REG);
|
218 |
|
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outb_p(byte, MCA_POS_REG(reg));
|
219 |
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outb_p(0, MCA_ADAPTER_SETUP_REG);
|
220 |
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|
221 |
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spin_unlock_irqrestore(&mca_lock, flags);
|
222 |
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|
223 |
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/* Update the global register list, while we have the byte */
|
224 |
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|
225 |
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mca_dev->pos[reg] = byte;
|
226 |
|
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|
227 |
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}
|
228 |
|
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|
229 |
|
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/* for the primary MCA bus, we have identity transforms */
|
230 |
|
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static int mca_dummy_transform_irq(struct mca_device * mca_dev, int irq)
|
231 |
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{
|
232 |
|
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return irq;
|
233 |
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}
|
234 |
|
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|
235 |
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static int mca_dummy_transform_ioport(struct mca_device * mca_dev, int port)
|
236 |
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{
|
237 |
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return port;
|
238 |
|
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}
|
239 |
|
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|
240 |
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static void *mca_dummy_transform_memory(struct mca_device * mca_dev, void *mem)
|
241 |
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{
|
242 |
|
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return mem;
|
243 |
|
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}
|
244 |
|
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|
245 |
|
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|
246 |
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static int __init mca_init(void)
|
247 |
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{
|
248 |
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unsigned int i, j;
|
249 |
|
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struct mca_device *mca_dev;
|
250 |
|
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unsigned char pos[8];
|
251 |
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short mca_builtin_scsi_ports[] = {0xf7, 0xfd, 0x00};
|
252 |
|
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struct mca_bus *bus;
|
253 |
|
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|
254 |
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/* WARNING: Be careful when making changes here. Putting an adapter
|
255 |
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* and the motherboard simultaneously into setup mode may result in
|
256 |
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* damage to chips (according to The Indispensible PC Hardware Book
|
257 |
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* by Hans-Peter Messmer). Also, we disable system interrupts (so
|
258 |
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* that we are not disturbed in the middle of this).
|
259 |
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*/
|
260 |
|
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|
261 |
|
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/* Make sure the MCA bus is present */
|
262 |
|
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|
263 |
|
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if (mca_system_init()) {
|
264 |
|
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printk(KERN_ERR "MCA bus system initialisation failed\n");
|
265 |
|
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return -ENODEV;
|
266 |
|
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}
|
267 |
|
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|
268 |
|
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if (!MCA_bus)
|
269 |
|
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return -ENODEV;
|
270 |
|
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|
271 |
|
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printk(KERN_INFO "Micro Channel bus detected.\n");
|
272 |
|
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|
273 |
|
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/* All MCA systems have at least a primary bus */
|
274 |
|
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bus = mca_attach_bus(MCA_PRIMARY_BUS);
|
275 |
|
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if (!bus)
|
276 |
|
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goto out_nomem;
|
277 |
|
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bus->default_dma_mask = 0xffffffffLL;
|
278 |
|
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bus->f.mca_write_pos = mca_pc_write_pos;
|
279 |
|
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bus->f.mca_read_pos = mca_pc_read_pos;
|
280 |
|
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bus->f.mca_transform_irq = mca_dummy_transform_irq;
|
281 |
|
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bus->f.mca_transform_ioport = mca_dummy_transform_ioport;
|
282 |
|
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bus->f.mca_transform_memory = mca_dummy_transform_memory;
|
283 |
|
|
|
284 |
|
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/* get the motherboard device */
|
285 |
|
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mca_dev = kzalloc(sizeof(struct mca_device), GFP_KERNEL);
|
286 |
|
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if(unlikely(!mca_dev))
|
287 |
|
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goto out_nomem;
|
288 |
|
|
|
289 |
|
|
/*
|
290 |
|
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* We do not expect many MCA interrupts during initialization,
|
291 |
|
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* but let us be safe:
|
292 |
|
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*/
|
293 |
|
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spin_lock_irq(&mca_lock);
|
294 |
|
|
|
295 |
|
|
/* Make sure adapter setup is off */
|
296 |
|
|
|
297 |
|
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outb_p(0, MCA_ADAPTER_SETUP_REG);
|
298 |
|
|
|
299 |
|
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/* Read motherboard POS registers */
|
300 |
|
|
|
301 |
|
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mca_dev->pos_register = 0x7f;
|
302 |
|
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outb_p(mca_dev->pos_register, MCA_MOTHERBOARD_SETUP_REG);
|
303 |
|
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mca_dev->name[0] = 0;
|
304 |
|
|
mca_read_and_store_pos(mca_dev->pos);
|
305 |
|
|
mca_configure_adapter_status(mca_dev);
|
306 |
|
|
/* fake POS and slot for a motherboard */
|
307 |
|
|
mca_dev->pos_id = MCA_MOTHERBOARD_POS;
|
308 |
|
|
mca_dev->slot = MCA_MOTHERBOARD;
|
309 |
|
|
mca_register_device(MCA_PRIMARY_BUS, mca_dev);
|
310 |
|
|
|
311 |
|
|
mca_dev = kzalloc(sizeof(struct mca_device), GFP_ATOMIC);
|
312 |
|
|
if(unlikely(!mca_dev))
|
313 |
|
|
goto out_unlock_nomem;
|
314 |
|
|
|
315 |
|
|
/* Put motherboard into video setup mode, read integrated video
|
316 |
|
|
* POS registers, and turn motherboard setup off.
|
317 |
|
|
*/
|
318 |
|
|
|
319 |
|
|
mca_dev->pos_register = 0xdf;
|
320 |
|
|
outb_p(mca_dev->pos_register, MCA_MOTHERBOARD_SETUP_REG);
|
321 |
|
|
mca_dev->name[0] = 0;
|
322 |
|
|
mca_read_and_store_pos(mca_dev->pos);
|
323 |
|
|
mca_configure_adapter_status(mca_dev);
|
324 |
|
|
/* fake POS and slot for the integrated video */
|
325 |
|
|
mca_dev->pos_id = MCA_INTEGVIDEO_POS;
|
326 |
|
|
mca_dev->slot = MCA_INTEGVIDEO;
|
327 |
|
|
mca_register_device(MCA_PRIMARY_BUS, mca_dev);
|
328 |
|
|
|
329 |
|
|
/* Put motherboard into scsi setup mode, read integrated scsi
|
330 |
|
|
* POS registers, and turn motherboard setup off.
|
331 |
|
|
*
|
332 |
|
|
* It seems there are two possible SCSI registers. Martin says that
|
333 |
|
|
* for the 56,57, 0xf7 is the one, but fails on the 76.
|
334 |
|
|
* Alfredo (apena@vnet.ibm.com) says
|
335 |
|
|
* 0xfd works on his machine. We'll try both of them. I figure it's
|
336 |
|
|
* a good bet that only one could be valid at a time. This could
|
337 |
|
|
* screw up though if one is used for something else on the other
|
338 |
|
|
* machine.
|
339 |
|
|
*/
|
340 |
|
|
|
341 |
|
|
for(i = 0; (which_scsi = mca_builtin_scsi_ports[i]) != 0; i++) {
|
342 |
|
|
outb_p(which_scsi, MCA_MOTHERBOARD_SETUP_REG);
|
343 |
|
|
if(mca_read_and_store_pos(pos))
|
344 |
|
|
break;
|
345 |
|
|
}
|
346 |
|
|
if(which_scsi) {
|
347 |
|
|
/* found a scsi card */
|
348 |
|
|
mca_dev = kzalloc(sizeof(struct mca_device), GFP_ATOMIC);
|
349 |
|
|
if(unlikely(!mca_dev))
|
350 |
|
|
goto out_unlock_nomem;
|
351 |
|
|
|
352 |
|
|
for(j = 0; j < 8; j++)
|
353 |
|
|
mca_dev->pos[j] = pos[j];
|
354 |
|
|
|
355 |
|
|
mca_configure_adapter_status(mca_dev);
|
356 |
|
|
/* fake POS and slot for integrated SCSI controller */
|
357 |
|
|
mca_dev->pos_id = MCA_INTEGSCSI_POS;
|
358 |
|
|
mca_dev->slot = MCA_INTEGSCSI;
|
359 |
|
|
mca_dev->pos_register = which_scsi;
|
360 |
|
|
mca_register_device(MCA_PRIMARY_BUS, mca_dev);
|
361 |
|
|
}
|
362 |
|
|
|
363 |
|
|
/* Turn off motherboard setup */
|
364 |
|
|
|
365 |
|
|
outb_p(0xff, MCA_MOTHERBOARD_SETUP_REG);
|
366 |
|
|
|
367 |
|
|
/* Now loop over MCA slots: put each adapter into setup mode, and
|
368 |
|
|
* read its POS registers. Then put adapter setup off.
|
369 |
|
|
*/
|
370 |
|
|
|
371 |
|
|
for(i=0; i<MCA_MAX_SLOT_NR; i++) {
|
372 |
|
|
outb_p(0x8|(i&0xf), MCA_ADAPTER_SETUP_REG);
|
373 |
|
|
if(!mca_read_and_store_pos(pos))
|
374 |
|
|
continue;
|
375 |
|
|
|
376 |
|
|
mca_dev = kzalloc(sizeof(struct mca_device), GFP_ATOMIC);
|
377 |
|
|
if(unlikely(!mca_dev))
|
378 |
|
|
goto out_unlock_nomem;
|
379 |
|
|
|
380 |
|
|
for(j=0; j<8; j++)
|
381 |
|
|
mca_dev->pos[j]=pos[j];
|
382 |
|
|
|
383 |
|
|
mca_dev->driver_loaded = 0;
|
384 |
|
|
mca_dev->slot = i;
|
385 |
|
|
mca_dev->pos_register = 0;
|
386 |
|
|
mca_configure_adapter_status(mca_dev);
|
387 |
|
|
mca_register_device(MCA_PRIMARY_BUS, mca_dev);
|
388 |
|
|
}
|
389 |
|
|
outb_p(0, MCA_ADAPTER_SETUP_REG);
|
390 |
|
|
|
391 |
|
|
/* Enable interrupts and return memory start */
|
392 |
|
|
spin_unlock_irq(&mca_lock);
|
393 |
|
|
|
394 |
|
|
for (i = 0; i < MCA_STANDARD_RESOURCES; i++)
|
395 |
|
|
request_resource(&ioport_resource, mca_standard_resources + i);
|
396 |
|
|
|
397 |
|
|
mca_do_proc_init();
|
398 |
|
|
|
399 |
|
|
return 0;
|
400 |
|
|
|
401 |
|
|
out_unlock_nomem:
|
402 |
|
|
spin_unlock_irq(&mca_lock);
|
403 |
|
|
out_nomem:
|
404 |
|
|
printk(KERN_EMERG "Failed memory allocation in MCA setup!\n");
|
405 |
|
|
return -ENOMEM;
|
406 |
|
|
}
|
407 |
|
|
|
408 |
|
|
subsys_initcall(mca_init);
|
409 |
|
|
|
410 |
|
|
/*--------------------------------------------------------------------*/
|
411 |
|
|
|
412 |
|
|
static __kprobes void
|
413 |
|
|
mca_handle_nmi_device(struct mca_device *mca_dev, int check_flag)
|
414 |
|
|
{
|
415 |
|
|
int slot = mca_dev->slot;
|
416 |
|
|
|
417 |
|
|
if(slot == MCA_INTEGSCSI) {
|
418 |
|
|
printk(KERN_CRIT "NMI: caused by MCA integrated SCSI adapter (%s)\n",
|
419 |
|
|
mca_dev->name);
|
420 |
|
|
} else if(slot == MCA_INTEGVIDEO) {
|
421 |
|
|
printk(KERN_CRIT "NMI: caused by MCA integrated video adapter (%s)\n",
|
422 |
|
|
mca_dev->name);
|
423 |
|
|
} else if(slot == MCA_MOTHERBOARD) {
|
424 |
|
|
printk(KERN_CRIT "NMI: caused by motherboard (%s)\n",
|
425 |
|
|
mca_dev->name);
|
426 |
|
|
}
|
427 |
|
|
|
428 |
|
|
/* More info available in POS 6 and 7? */
|
429 |
|
|
|
430 |
|
|
if(check_flag) {
|
431 |
|
|
unsigned char pos6, pos7;
|
432 |
|
|
|
433 |
|
|
pos6 = mca_device_read_pos(mca_dev, 6);
|
434 |
|
|
pos7 = mca_device_read_pos(mca_dev, 7);
|
435 |
|
|
|
436 |
|
|
printk(KERN_CRIT "NMI: POS 6 = 0x%x, POS 7 = 0x%x\n", pos6, pos7);
|
437 |
|
|
}
|
438 |
|
|
|
439 |
|
|
} /* mca_handle_nmi_slot */
|
440 |
|
|
|
441 |
|
|
/*--------------------------------------------------------------------*/
|
442 |
|
|
|
443 |
|
|
static int __kprobes mca_handle_nmi_callback(struct device *dev, void *data)
|
444 |
|
|
{
|
445 |
|
|
struct mca_device *mca_dev = to_mca_device(dev);
|
446 |
|
|
unsigned char pos5;
|
447 |
|
|
|
448 |
|
|
pos5 = mca_device_read_pos(mca_dev, 5);
|
449 |
|
|
|
450 |
|
|
if(!(pos5 & 0x80)) {
|
451 |
|
|
/* Bit 7 of POS 5 is reset when this adapter has a hardware
|
452 |
|
|
* error. Bit 7 it reset if there's error information
|
453 |
|
|
* available in POS 6 and 7.
|
454 |
|
|
*/
|
455 |
|
|
mca_handle_nmi_device(mca_dev, !(pos5 & 0x40));
|
456 |
|
|
return 1;
|
457 |
|
|
}
|
458 |
|
|
return 0;
|
459 |
|
|
}
|
460 |
|
|
|
461 |
|
|
void __kprobes mca_handle_nmi(void)
|
462 |
|
|
{
|
463 |
|
|
/* First try - scan the various adapters and see if a specific
|
464 |
|
|
* adapter was responsible for the error.
|
465 |
|
|
*/
|
466 |
|
|
bus_for_each_dev(&mca_bus_type, NULL, NULL, mca_handle_nmi_callback);
|
467 |
|
|
|
468 |
|
|
mca_nmi_hook();
|
469 |
|
|
} /* mca_handle_nmi */
|