[176f133] | 1 | /*===============================================================*\ |
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| 2 | | Project: RTEMS PC386 IDE harddisc driver | |
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| 3 | +-----------------------------------------------------------------+ |
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| 4 | | File: ide.c | |
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| 5 | +-----------------------------------------------------------------+ |
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| 6 | | Copyright (c) 2003 IMD | |
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| 7 | | Ingenieurbuero fuer Microcomputertechnik Th. Doerfler | |
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| 8 | | <Thomas.Doerfler@imd-systems.de> | |
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| 9 | | all rights reserved | |
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| 10 | +-----------------------------------------------------------------+ |
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| 11 | | this file contains the BSP layer for IDE access below the | |
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| 12 | | libchip IDE harddisc driver | |
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| 13 | | based on a board specific driver from | |
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| 14 | | Eugeny S. Mints, Oktet | |
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| 15 | | | |
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| 16 | | The license and distribution terms for this file may be | |
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| 17 | | found in the file LICENSE in this distribution or at | |
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| 18 | | http://www.rtems.com/license/LICENSE. | |
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| 19 | | | |
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| 20 | +-----------------------------------------------------------------+ |
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| 21 | | date history ID | |
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| 22 | | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
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| 23 | | 01.14.03 creation doe | |
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| 24 | \*===============================================================*/ |
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| 25 | |
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| 26 | #include <rtems.h> |
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| 27 | #include <bsp.h> |
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| 28 | #include <libchip/ide_ctrl.h> |
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| 29 | #include <libchip/ide_ctrl_cfg.h> |
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| 30 | #include <libchip/ide_ctrl_io.h> |
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| 31 | |
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| 32 | /* #define DEBUG_OUT */ |
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[1c5ebc5] | 33 | |
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| 34 | static bool pc386_ide_status_busy (uint32_t port, |
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| 35 | uint32_t timeout, |
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| 36 | uint8_t* status_val) |
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| 37 | { |
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| 38 | do |
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| 39 | { |
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| 40 | inport_byte (port + IDE_REGISTER_STATUS, *status_val); |
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| 41 | if ((*status_val & IDE_REGISTER_STATUS_BSY) == 0) |
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| 42 | return true; |
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| 43 | |
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| 44 | if (timeout) |
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| 45 | { |
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| 46 | timeout--; |
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| 47 | rtems_task_wake_after (TOD_MICROSECONDS_TO_TICKS (1000)); |
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| 48 | } |
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| 49 | } |
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| 50 | while (timeout); |
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| 51 | |
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| 52 | return false; |
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| 53 | } |
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| 54 | |
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| 55 | static bool pc386_ide_status_data_ready (uint32_t port, |
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| 56 | uint32_t timeout, |
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| 57 | uint8_t* status_val) |
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| 58 | { |
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| 59 | do |
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| 60 | { |
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| 61 | inport_byte (port + IDE_REGISTER_STATUS, *status_val); |
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| 62 | |
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| 63 | if (((*status_val & IDE_REGISTER_STATUS_BSY) == 0) && |
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| 64 | (*status_val & IDE_REGISTER_STATUS_DRQ)) |
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| 65 | return true; |
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| 66 | |
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| 67 | if (timeout) |
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| 68 | { |
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| 69 | timeout--; |
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| 70 | rtems_task_wake_after (TOD_MICROSECONDS_TO_TICKS (1000)); |
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| 71 | } |
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| 72 | } |
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| 73 | while (timeout); |
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| 74 | |
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| 75 | return false; |
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| 76 | } |
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| 77 | |
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[176f133] | 78 | /* |
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| 79 | * support functions for IDE harddisk IF |
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| 80 | */ |
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| 81 | /*=========================================================================*\ |
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| 82 | | Function: | |
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| 83 | \*-------------------------------------------------------------------------*/ |
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[39d08d55] | 84 | bool pc386_ide_probe |
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[176f133] | 85 | ( |
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| 86 | /*-------------------------------------------------------------------------*\ |
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| 87 | | Purpose: | |
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| 88 | | This function should probe, whether a IDE disk is available | |
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| 89 | +---------------------------------------------------------------------------+ |
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| 90 | | Input Parameters: | |
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| 91 | \*-------------------------------------------------------------------------*/ |
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| 92 | int minor |
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| 93 | ) |
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| 94 | /*-------------------------------------------------------------------------*\ |
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| 95 | | Return Value: | |
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[39d08d55] | 96 | | true, when flash disk available | |
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[176f133] | 97 | \*=========================================================================*/ |
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| 98 | { |
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[39d08d55] | 99 | bool ide_card_plugged = true; /* assume: we have a disk here */ |
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[176f133] | 100 | |
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| 101 | return ide_card_plugged; |
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| 102 | } |
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| 103 | |
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| 104 | /*=========================================================================*\ |
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| 105 | | Function: | |
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| 106 | \*-------------------------------------------------------------------------*/ |
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| 107 | void pc386_ide_initialize |
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| 108 | ( |
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| 109 | /*-------------------------------------------------------------------------*\ |
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| 110 | | Purpose: | |
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| 111 | | initialize IDE access | |
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| 112 | +---------------------------------------------------------------------------+ |
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| 113 | | Input Parameters: | |
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| 114 | \*-------------------------------------------------------------------------*/ |
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| 115 | int minor /* controller minor number */ |
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| 116 | ) |
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| 117 | /*-------------------------------------------------------------------------*\ |
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| 118 | | Return Value: | |
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| 119 | | <none> | |
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| 120 | \*=========================================================================*/ |
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| 121 | { |
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| 122 | /* |
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| 123 | * FIXME: enable interrupts, if needed |
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| 124 | */ |
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| 125 | } |
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| 126 | |
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| 127 | /*=========================================================================*\ |
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| 128 | | Function: | |
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| 129 | \*-------------------------------------------------------------------------*/ |
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| 130 | void pc386_ide_read_reg |
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| 131 | ( |
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| 132 | /*-------------------------------------------------------------------------*\ |
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| 133 | | Purpose: | |
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| 134 | | read a IDE controller register | |
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| 135 | +---------------------------------------------------------------------------+ |
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| 136 | | Input Parameters: | |
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| 137 | \*-------------------------------------------------------------------------*/ |
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| 138 | int minor, /* controller minor number */ |
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| 139 | int reg, /* register index to access */ |
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| 140 | uint16_t *value /* ptr to return value location */ |
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| 141 | ) |
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| 142 | /*-------------------------------------------------------------------------*\ |
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| 143 | | Return Value: | |
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| 144 | | <none> | |
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| 145 | \*=========================================================================*/ |
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| 146 | { |
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| 147 | uint32_t port = IDE_Controller_Table[minor].port1; |
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| 148 | uint8_t bval1,bval2; |
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| 149 | |
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| 150 | if (reg == IDE_REGISTER_DATA_WORD) { |
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| 151 | inport_byte(port+reg, bval1); |
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| 152 | inport_byte(port+reg+1, bval2); |
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| 153 | *value = bval1 + (bval2 << 8); |
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| 154 | } |
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| 155 | else { |
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| 156 | inport_byte(port+reg, bval1); |
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| 157 | *value = bval1; |
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| 158 | } |
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| 159 | #ifdef DEBUG_OUT |
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| 160 | printk("pc386_ide_read_reg (0x%x)=0x%x\r\n",reg,*value & 0xff); |
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| 161 | #endif |
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| 162 | } |
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| 163 | |
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| 164 | /*=========================================================================*\ |
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| 165 | | Function: | |
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| 166 | \*-------------------------------------------------------------------------*/ |
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| 167 | void pc386_ide_write_reg |
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| 168 | ( |
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| 169 | /*-------------------------------------------------------------------------*\ |
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| 170 | | Purpose: | |
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| 171 | | write a IDE controller register | |
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| 172 | +---------------------------------------------------------------------------+ |
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| 173 | | Input Parameters: | |
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| 174 | \*-------------------------------------------------------------------------*/ |
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| 175 | int minor, /* controller minor number */ |
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| 176 | int reg, /* register index to access */ |
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| 177 | uint16_t value /* value to write */ |
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| 178 | ) |
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| 179 | /*-------------------------------------------------------------------------*\ |
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| 180 | | Return Value: | |
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| 181 | | <none> | |
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| 182 | \*=========================================================================*/ |
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| 183 | { |
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| 184 | uint32_t port = IDE_Controller_Table[minor].port1; |
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| 185 | |
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| 186 | #ifdef DEBUG_OUT |
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| 187 | printk("pc386_ide_write_reg(0x%x,0x%x)\r\n",reg,value & 0xff); |
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| 188 | #endif |
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| 189 | if (reg == IDE_REGISTER_DATA_WORD) { |
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| 190 | outport_word(port+reg,value); |
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| 191 | } |
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| 192 | else { |
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| 193 | outport_byte(port+reg,value); |
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| 194 | } |
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| 195 | } |
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| 196 | |
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| 197 | /*=========================================================================*\ |
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| 198 | | Function: | |
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| 199 | \*-------------------------------------------------------------------------*/ |
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| 200 | void pc386_ide_read_block |
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| 201 | ( |
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| 202 | /*-------------------------------------------------------------------------*\ |
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| 203 | | Purpose: | |
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| 204 | | read a IDE controller data block | |
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| 205 | +---------------------------------------------------------------------------+ |
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| 206 | | Input Parameters: | |
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| 207 | \*-------------------------------------------------------------------------*/ |
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| 208 | int minor, |
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| 209 | uint16_t block_size, |
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| 210 | rtems_blkdev_sg_buffer *bufs, |
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| 211 | uint32_t *cbuf, |
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| 212 | uint32_t *pos |
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| 213 | ) |
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| 214 | /*-------------------------------------------------------------------------*\ |
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| 215 | | Return Value: | |
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| 216 | | <none> | |
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| 217 | \*=========================================================================*/ |
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| 218 | { |
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| 219 | uint32_t port = IDE_Controller_Table[minor].port1; |
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| 220 | uint16_t cnt = 0; |
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| 221 | uint32_t llength = bufs[(*cbuf)].length; |
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[1c5ebc5] | 222 | uint8_t status_val; |
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[176f133] | 223 | uint16_t *lbuf = (uint16_t*) |
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| 224 | ((uint8_t*)(bufs[(*cbuf)].buffer) + (*pos)); |
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| 225 | |
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[1c5ebc5] | 226 | while (cnt < block_size) |
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| 227 | { |
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| 228 | if (!pc386_ide_status_data_ready (port, 100, &status_val)) |
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| 229 | { |
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| 230 | printk ("pc386_ide_read_block: status=%02x, cnt=%d bs=%d\n", status_val, cnt, block_size); |
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| 231 | /* FIXME: add an error here. */ |
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| 232 | return; |
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| 233 | } |
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| 234 | |
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| 235 | if (status_val & IDE_REGISTER_STATUS_ERR) |
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| 236 | printk("pc386_ide_read_block: error: %02x\n", status_val); |
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| 237 | |
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[176f133] | 238 | inport_word(port+IDE_REGISTER_DATA,*lbuf); |
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| 239 | |
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| 240 | #ifdef DEBUG_OUT |
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| 241 | printk("0x%x ",*lbuf); |
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| 242 | #endif |
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[1c5ebc5] | 243 | |
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[176f133] | 244 | lbuf++; |
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| 245 | cnt += sizeof(*lbuf); |
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| 246 | (*pos) += sizeof(*lbuf); |
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| 247 | if ((*pos) == llength) { |
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| 248 | (*pos) = 0; |
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| 249 | (*cbuf)++; |
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| 250 | lbuf = bufs[(*cbuf)].buffer; |
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| 251 | llength = bufs[(*cbuf)].length; |
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| 252 | } |
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| 253 | } |
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| 254 | } |
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| 255 | |
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| 256 | /*=========================================================================*\ |
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| 257 | | Function: | |
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| 258 | \*-------------------------------------------------------------------------*/ |
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| 259 | void pc386_ide_write_block |
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| 260 | ( |
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| 261 | /*-------------------------------------------------------------------------*\ |
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| 262 | | Purpose: | |
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| 263 | | write a IDE controller data block | |
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| 264 | +---------------------------------------------------------------------------+ |
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| 265 | | Input Parameters: | |
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| 266 | \*-------------------------------------------------------------------------*/ |
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| 267 | int minor, |
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| 268 | uint16_t block_size, |
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| 269 | rtems_blkdev_sg_buffer *bufs, |
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| 270 | uint32_t *cbuf, |
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| 271 | uint32_t *pos |
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| 272 | ) |
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| 273 | /*-------------------------------------------------------------------------*\ |
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| 274 | | Return Value: | |
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| 275 | | <none> | |
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| 276 | \*=========================================================================*/ |
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| 277 | { |
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| 278 | uint32_t port = IDE_Controller_Table[minor].port1; |
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| 279 | uint16_t cnt = 0; |
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| 280 | uint32_t llength = bufs[(*cbuf)].length; |
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| 281 | uint8_t status_val; |
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| 282 | uint16_t *lbuf = (uint16_t*) |
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| 283 | ((uint8_t*)(bufs[(*cbuf)].buffer) + (*pos)); |
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[1c5ebc5] | 284 | |
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[176f133] | 285 | #ifdef DEBUG_OUT |
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[1c5ebc5] | 286 | printk("pc386_ide_write_block()\n"); |
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[176f133] | 287 | #endif |
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[1c5ebc5] | 288 | |
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| 289 | while (cnt < block_size) |
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| 290 | { |
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| 291 | if (!pc386_ide_status_data_ready (port, 100, &status_val)) |
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| 292 | { |
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| 293 | printk ("pc386_ide_write_block: status=%02x, cnt=%d bs=%d\n", status_val, cnt, block_size); |
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| 294 | /* FIXME: add an error here. */ |
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| 295 | return; |
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| 296 | } |
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| 297 | |
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| 298 | if (status_val & IDE_REGISTER_STATUS_ERR) |
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| 299 | printk("pc386_ide_write_block: error: %02x\n", status_val); |
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| 300 | |
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[176f133] | 301 | #ifdef DEBUG_OUT |
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| 302 | printk("0x%x ",*lbuf); |
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| 303 | #endif |
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| 304 | outport_word(port+IDE_REGISTER_DATA,*lbuf); |
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| 305 | lbuf++; |
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| 306 | cnt += sizeof(*lbuf); |
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| 307 | (*pos) += sizeof(*lbuf); |
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| 308 | if ((*pos) == llength) { |
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| 309 | (*pos) = 0; |
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| 310 | (*cbuf)++; |
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| 311 | lbuf = bufs[(*cbuf)].buffer; |
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| 312 | llength = bufs[(*cbuf)].length; |
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| 313 | } |
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| 314 | } |
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| 315 | } |
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| 316 | |
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| 317 | /*=========================================================================*\ |
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| 318 | | Function: | |
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| 319 | \*-------------------------------------------------------------------------*/ |
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| 320 | int pc386_ide_control |
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| 321 | ( |
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| 322 | /*-------------------------------------------------------------------------*\ |
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| 323 | | Purpose: | |
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| 324 | | control interface for controller | |
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| 325 | +---------------------------------------------------------------------------+ |
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| 326 | | Input Parameters: | |
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| 327 | \*-------------------------------------------------------------------------*/ |
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| 328 | int minor, /* controller minor number */ |
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| 329 | uint32_t cmd, /* command to send */ |
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| 330 | void * arg /* optional argument */ |
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| 331 | ) |
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| 332 | /*-------------------------------------------------------------------------*\ |
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| 333 | | Return Value: | |
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| 334 | | <none> | |
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| 335 | \*=========================================================================*/ |
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| 336 | { |
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| 337 | return 0; |
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| 338 | } |
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| 339 | |
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| 340 | /*=========================================================================*\ |
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| 341 | | Function: | |
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| 342 | \*-------------------------------------------------------------------------*/ |
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| 343 | rtems_status_code pc386_ide_config_io_speed |
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| 344 | ( |
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| 345 | /*-------------------------------------------------------------------------*\ |
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| 346 | | Purpose: | |
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| 347 | | set up transfer speed, if possible | |
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| 348 | +---------------------------------------------------------------------------+ |
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| 349 | | Input Parameters: | |
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| 350 | \*-------------------------------------------------------------------------*/ |
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| 351 | int minor, /* controller minor number */ |
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| 352 | uint16_t modes_avail /* optional argument */ |
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| 353 | ) |
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| 354 | /*-------------------------------------------------------------------------*\ |
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| 355 | | Return Value: | |
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| 356 | | rtems_status_code | |
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| 357 | \*=========================================================================*/ |
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| 358 | { |
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| 359 | return RTEMS_SUCCESSFUL; |
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| 360 | } |
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| 361 | |
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| 362 | /* |
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| 363 | * The following table configures the functions used for IDE drivers |
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| 364 | * in this BSP. |
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| 365 | */ |
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| 366 | |
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| 367 | ide_ctrl_fns_t pc386_ide_ctrl_fns = { |
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| 368 | pc386_ide_probe, |
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| 369 | pc386_ide_initialize, |
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| 370 | pc386_ide_control, |
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| 371 | pc386_ide_read_reg, |
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| 372 | pc386_ide_write_reg, |
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| 373 | pc386_ide_read_block, |
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| 374 | pc386_ide_write_block, |
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| 375 | pc386_ide_config_io_speed |
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| 376 | }; |
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