[ef142d7] | 1 | /* |
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| 2 | * ata.c |
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| 3 | * |
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| 4 | * ATA RTEMS driver. ATA driver is hardware independant implementation of |
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| 5 | * ATA-2 standart, working draft X3T10/0948D, revision 4c. ATA driver bases |
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| 6 | * on RTEMS IDE controller driver. |
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| 7 | * |
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| 8 | * Copyright (C) 2001 OKTET Ltd., St.-Petersburg, Russia |
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| 9 | * Authors: Eugeny S. Mints <Eugeny.Mints@oktet.ru> |
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| 10 | * |
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| 11 | * The license and distribution terms for this file may be |
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| 12 | * found in the file LICENSE in this distribution or at |
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[5b38506] | 13 | * http://www.rtems.com/license/LICENSE. |
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[ef142d7] | 14 | * |
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| 15 | * $Id$ |
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| 16 | * |
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| 17 | */ |
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| 18 | #include <errno.h> |
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| 19 | #include <chain.h> |
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| 20 | #include <assert.h> |
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[dbe06865] | 21 | #include <string.h> /* for "memset" declaration */ |
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[ef142d7] | 22 | |
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| 23 | #include <rtems/diskdevs.h> |
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| 24 | #include <rtems/blkdev.h> |
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| 25 | #include <libchip/ide_ctrl_io.h> |
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| 26 | #include <libchip/ide_ctrl_cfg.h> |
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| 27 | #include <rtems/ata_internal.h> |
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| 28 | #include <rtems/ata.h> |
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| 29 | |
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| 30 | #define DEBUG |
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| 31 | |
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| 32 | #ifdef DEBUG |
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| 33 | #include <stdio.h> |
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| 34 | #endif |
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| 35 | |
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| 36 | #define SAFE |
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| 37 | #ifdef SAFE |
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| 38 | typedef rtems_mode preemption_key; |
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| 39 | |
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| 40 | #define DISABLE_PREEMPTION(key) \ |
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| 41 | do { \ |
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[828be6d] | 42 | rtems_task_mode(RTEMS_NO_PREEMPT, RTEMS_PREEMPT_MASK, &(key)); \ |
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[ef142d7] | 43 | } while (0) |
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| 44 | |
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| 45 | #define ENABLE_PREEMPTION(key) \ |
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| 46 | do { \ |
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| 47 | rtems_mode temp; \ |
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[828be6d] | 48 | rtems_task_mode((key), RTEMS_PREEMPT_MASK, &temp); \ |
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[ef142d7] | 49 | } while (0) |
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| 50 | |
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| 51 | #else |
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| 52 | |
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| 53 | typedef boolean preemption_key; |
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| 54 | |
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| 55 | #define DISABLE_PREEMPTION(key) \ |
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| 56 | do { \ |
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| 57 | (key) = _Thread_Executing->is_preemptible; \ |
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| 58 | _Thread_Executing->is_preemptible = 0; \ |
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| 59 | } while (0) |
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| 60 | |
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| 61 | #define ENABLE_PREEMPTION(key) \ |
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| 62 | do { \ |
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| 63 | _Thread_Executing->is_preemptible = (key); \ |
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| 64 | if (_Thread_Evaluate_mode()) \ |
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| 65 | _Thread_Dispatch(); \ |
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| 66 | } while (0) |
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| 67 | |
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| 68 | #endif |
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| 69 | |
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| 70 | /* FIXME: case if ATA device is FLASH device need more attention */ |
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| 71 | #undef ATA_DEV_IS_FLASH_DISK |
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| 72 | |
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| 73 | /* Block device request with a single buffer provided */ |
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| 74 | typedef struct blkdev_request1 { |
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| 75 | blkdev_request req; |
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| 76 | blkdev_sg_buffer sg[1]; |
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| 77 | } blkdev_request1; |
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| 78 | |
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| 79 | |
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| 80 | /* Array indexed by controllers minor number */ |
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| 81 | static ata_ide_ctrl_t ata_ide_ctrls[IDE_CTRL_MAX_MINOR_NUMBER]; |
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| 82 | |
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| 83 | /* |
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| 84 | * Mapping from ATA-minor numbers to |
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| 85 | * controller-minor and device on this controller. |
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| 86 | */ |
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| 87 | static ata_ide_dev_t ata_devs[2 * IDE_CTRL_MAX_MINOR_NUMBER]; |
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| 88 | static int ata_devs_number; |
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| 89 | |
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| 90 | /* Flag meaning that ATA driver has already been initialized */ |
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| 91 | static rtems_boolean ata_initialized = FALSE; |
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| 92 | |
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| 93 | |
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| 94 | /* task and queue used for asynchronous I/O operations */ |
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| 95 | static rtems_id ata_task_id; |
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| 96 | static rtems_id ata_queue_id; |
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| 97 | |
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| 98 | /* Mapping of interrupt vectors to devices */ |
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| 99 | static Chain_Control ata_int_vec[ATA_MAX_RTEMS_INT_VEC_NUMBER + 1]; |
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| 100 | |
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| 101 | static void |
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| 102 | ata_process_request(rtems_device_minor_number ctrl_minor); |
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| 103 | |
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| 104 | static void |
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| 105 | ata_process_request_on_init_phase(rtems_device_minor_number ctrl_minor, |
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| 106 | ata_req_t *areq); |
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| 107 | |
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| 108 | static void |
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| 109 | ata_add_to_controller_queue(rtems_device_minor_number ctrl_minor, |
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| 110 | ata_req_t *areq); |
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| 111 | |
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| 112 | /* |
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| 113 | * read/write, open/close and ioctl are provided by general block device |
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| 114 | * driver. Only initialization and ata-specific ioctl are here. |
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| 115 | */ |
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| 116 | |
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| 117 | /* ata_io_data_request -- |
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| 118 | * Form read/write request for an ATA device and enqueue it to |
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| 119 | * IDE controller. |
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| 120 | * |
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| 121 | * PARAMETERS: |
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| 122 | * device - device identifier |
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| 123 | * req - read/write request from block device driver |
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| 124 | * |
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| 125 | * RETURNS: |
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| 126 | * RTEMS_SUCCESSFUL on success, or error code if |
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| 127 | * error occured |
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| 128 | */ |
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| 129 | static rtems_status_code |
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| 130 | ata_io_data_request(dev_t device, blkdev_request *req) |
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| 131 | { |
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| 132 | ata_req_t *areq; /* ATA request */ |
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| 133 | rtems_device_minor_number rel_minor; /* relative minor which indexes |
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| 134 | * ata_devs array |
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| 135 | */ |
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| 136 | rtems_device_minor_number ctrl_minor; |
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| 137 | unsigned8 dev; |
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| 138 | |
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| 139 | rel_minor = (rtems_filesystem_dev_minor_t(device)) / |
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| 140 | ATA_MINOR_NUM_RESERVED_PER_ATA_DEVICE; |
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| 141 | |
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| 142 | /* get controller which serves the ATA device */ |
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| 143 | ctrl_minor = ata_devs[rel_minor].ctrl_minor; |
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| 144 | |
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| 145 | /* get ATA device identifier (0 or 1) */ |
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| 146 | dev = ata_devs[rel_minor].device; |
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| 147 | |
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| 148 | areq = malloc(sizeof(ata_req_t)); |
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| 149 | if (areq == NULL) |
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| 150 | { |
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| 151 | return RTEMS_NO_MEMORY; |
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| 152 | } |
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| 153 | |
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| 154 | areq->breq = req; |
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| 155 | areq->cnt = req->count; |
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| 156 | areq->cbuf = 0; |
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| 157 | areq->pos = 0; |
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| 158 | |
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| 159 | /* set up registers masks */ |
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| 160 | areq->regs.to_write = ATA_REGISTERS_POSITION; |
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| 161 | areq->regs.to_read = ATA_REGISTERS_VALUE(IDE_REGISTER_STATUS); |
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| 162 | |
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| 163 | /* choose device on the controller for which the command will be issued */ |
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| 164 | areq->regs.regs[IDE_REGISTER_DEVICE_HEAD] = |
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| 165 | (dev << IDE_REGISTER_DEVICE_HEAD_DEV_POS); |
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| 166 | |
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| 167 | /* Find ATA command and its type */ |
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| 168 | if (ATA_DEV_INFO(ctrl_minor, dev).mode_active & ATA_MODES_DMA) |
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| 169 | { |
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| 170 | /* XXX: never has been tested */ |
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| 171 | areq->type = ATA_COMMAND_TYPE_DMA; |
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| 172 | if (req->req == BLKDEV_REQ_READ) |
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| 173 | areq->regs.regs[IDE_REGISTER_COMMAND] = ATA_COMMAND_READ_DMA; |
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| 174 | else |
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| 175 | areq->regs.regs[IDE_REGISTER_COMMAND] = ATA_COMMAND_WRITE_DMA; |
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| 176 | } |
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| 177 | else |
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| 178 | { |
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| 179 | if (req->req == BLKDEV_REQ_READ) |
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| 180 | { |
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| 181 | areq->type = ATA_COMMAND_TYPE_PIO_IN; |
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| 182 | |
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| 183 | /* |
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| 184 | * choose command to issue: if the number of blocks to be |
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| 185 | * exchanged is greater then 1 and for ATA command READ MULTIPLE |
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| 186 | * data block consists of more then 1 sector choose READ MULTIPLE |
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| 187 | * otherwise READ SECTORS |
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| 188 | */ |
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| 189 | areq->regs.regs[IDE_REGISTER_COMMAND] = |
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| 190 | ((ATA_DEV_INFO(ctrl_minor, dev).max_multiple) && |
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| 191 | (req->count > 1) && |
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| 192 | (ATA_DEV_INFO(ctrl_minor, dev).current_multiple > 1)) ? |
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| 193 | ATA_COMMAND_READ_MULTIPLE : |
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| 194 | ATA_COMMAND_READ_SECTORS; |
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| 195 | } |
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| 196 | else |
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| 197 | { |
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| 198 | areq->type = ATA_COMMAND_TYPE_PIO_OUT; |
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| 199 | |
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| 200 | /* |
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| 201 | * choose command to issue: if the number of blocks to be |
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| 202 | * exchanged is greater then 1 and for ATA command WRITE MULTIPLE |
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| 203 | * data block consists of more then 1 sector choose WRITE MULTIPLE |
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| 204 | * otherwise WRITE SECTORS |
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| 205 | */ |
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| 206 | areq->regs.regs[IDE_REGISTER_COMMAND] = |
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| 207 | ((ATA_DEV_INFO(ctrl_minor, dev).max_multiple) && |
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| 208 | (req->count > 1) && |
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| 209 | (ATA_DEV_INFO(ctrl_minor, dev).current_multiple > 1)) ? |
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| 210 | ATA_COMMAND_WRITE_MULTIPLE : |
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| 211 | ATA_COMMAND_WRITE_SECTORS; |
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| 212 | } |
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| 213 | } |
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| 214 | |
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| 215 | /* |
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| 216 | * Fill position registers |
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| 217 | */ |
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| 218 | if (ATA_DEV_INFO(ctrl_minor, dev).lba_avaible) |
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| 219 | { |
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| 220 | areq->regs.regs[IDE_REGISTER_LBA0] = (unsigned8)req->start; |
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| 221 | areq->regs.regs[IDE_REGISTER_LBA1] = (unsigned8)(req->start >> 8); |
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| 222 | areq->regs.regs[IDE_REGISTER_LBA2] = (unsigned8)(req->start >> 16); |
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| 223 | areq->regs.regs[IDE_REGISTER_LBA3] |= (unsigned8) (req->start >> 24); |
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| 224 | areq->regs.regs[IDE_REGISTER_LBA3] |= IDE_REGISTER_LBA3_L; |
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| 225 | } |
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| 226 | else |
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| 227 | { |
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| 228 | unsigned32 count = req->start; |
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| 229 | |
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| 230 | areq->regs.regs[IDE_REGISTER_SECTOR_NUMBER] = |
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| 231 | (count % ATA_DEV_INFO(ctrl_minor, dev).sectors) + 1; |
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| 232 | |
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| 233 | /* now count = number of tracks: */ |
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| 234 | count /= ATA_DEV_INFO(ctrl_minor, dev).sectors; |
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| 235 | areq->regs.regs[IDE_REGISTER_DEVICE_HEAD] |= |
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| 236 | (count / ATA_DEV_INFO(ctrl_minor, dev).cylinders); |
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| 237 | |
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| 238 | /* now count = number of cylinders */ |
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| 239 | count %= ATA_DEV_INFO(ctrl_minor, dev).cylinders; |
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| 240 | areq->regs.regs[IDE_REGISTER_CYLINDER_LOW] = (unsigned8)count; |
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| 241 | areq->regs.regs[IDE_REGISTER_CYLINDER_HIGH] = (unsigned8)(count >> 8); |
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| 242 | areq->regs.regs[IDE_REGISTER_DEVICE_HEAD] &= |
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| 243 | ~IDE_REGISTER_DEVICE_HEAD_L; |
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| 244 | } |
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| 245 | |
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| 246 | /* fill sector count register */ |
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| 247 | areq->regs.regs[IDE_REGISTER_SECTOR_COUNT] = areq->breq->count; |
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| 248 | |
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| 249 | /* add request to the queue of awaiting requests to the controller */ |
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| 250 | ata_add_to_controller_queue(ctrl_minor, areq); |
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| 251 | |
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| 252 | return RTEMS_SUCCESSFUL; |
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| 253 | } |
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| 254 | |
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| 255 | /* ata_non_data_request -- |
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| 256 | * Form and serve request of NON DATA type for an ATA device. |
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| 257 | * Processing of NON DATA request is SYNChronous operation. |
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| 258 | * |
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| 259 | * PARAMETERS: |
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| 260 | * device - device identifier |
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| 261 | * cmd - command |
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| 262 | * argp - arguments for command |
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| 263 | * |
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| 264 | * RETURNS: |
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| 265 | * RTEMS_SUCCESSFUL on success, or error code if |
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| 266 | * error occured |
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| 267 | */ |
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| 268 | static rtems_status_code |
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| 269 | ata_non_data_request(dev_t device, int cmd, void *argp) |
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| 270 | { |
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| 271 | rtems_status_code rc; |
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| 272 | ata_req_t *areq; /* ATA request */ |
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| 273 | rtems_device_minor_number rel_minor; /* relative minor which indexes |
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| 274 | * ata_devs array |
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| 275 | */ |
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| 276 | rtems_device_minor_number ctrl_minor; |
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| 277 | unsigned8 dev; |
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| 278 | ata_queue_msg_t msg; |
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| 279 | |
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| 280 | rel_minor = (rtems_filesystem_dev_minor_t(device)) / |
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| 281 | ATA_MINOR_NUM_RESERVED_PER_ATA_DEVICE; |
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| 282 | |
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| 283 | /* get controller which serves the ATA device */ |
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| 284 | ctrl_minor = ata_devs[rel_minor].ctrl_minor; |
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| 285 | |
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| 286 | /* get ATA device identifier (0 or 1) */ |
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| 287 | dev = ata_devs[rel_minor].device; |
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| 288 | |
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| 289 | /* form the request */ |
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| 290 | areq = malloc(sizeof(ata_req_t)); |
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| 291 | if (areq == NULL) |
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| 292 | { |
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| 293 | return RTEMS_NO_MEMORY; |
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| 294 | } |
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| 295 | memset(areq, 0, sizeof(ata_req_t)); |
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| 296 | |
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| 297 | areq->type = ATA_COMMAND_TYPE_NON_DATA; |
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| 298 | areq->regs.to_write = ATA_REGISTERS_VALUE(IDE_REGISTER_COMMAND); |
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| 299 | areq->regs.regs[IDE_REGISTER_DEVICE_HEAD] |= |
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| 300 | (dev << IDE_REGISTER_DEVICE_HEAD_DEV_POS); |
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| 301 | areq->breq = NULL; |
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| 302 | areq->regs.to_read = ATA_REGISTERS_VALUE(IDE_REGISTER_ERROR); |
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| 303 | |
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| 304 | /* |
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| 305 | * depending on command fill command register and additional registers |
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| 306 | * which are needed for command execution |
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| 307 | */ |
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| 308 | switch(cmd) |
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| 309 | { |
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| 310 | case ATAIO_SET_MULTIPLE_MODE: |
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| 311 | areq->regs.regs[IDE_REGISTER_COMMAND] = |
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| 312 | ATA_COMMAND_SET_MULTIPLE_MODE; |
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| 313 | areq->regs.to_write |= |
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| 314 | ATA_REGISTERS_VALUE(IDE_REGISTER_SECTOR_COUNT); |
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| 315 | areq->regs.regs[IDE_REGISTER_SECTOR_COUNT] = *(unsigned8 *)argp; |
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| 316 | break; |
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| 317 | |
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| 318 | default: |
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| 319 | free(areq); |
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| 320 | return RTEMS_INVALID_NUMBER; |
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| 321 | break; |
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| 322 | } |
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| 323 | |
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| 324 | rc = rtems_semaphore_create(rtems_build_name('I', 'D', 'E', 'S'), |
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| 325 | 0, |
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| 326 | RTEMS_FIFO | RTEMS_COUNTING_SEMAPHORE | |
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| 327 | RTEMS_NO_INHERIT_PRIORITY | |
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| 328 | RTEMS_NO_PRIORITY_CEILING | RTEMS_LOCAL, |
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| 329 | 0, |
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| 330 | &(areq->sema)); |
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| 331 | if (rc != RTEMS_SUCCESSFUL) |
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| 332 | { |
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| 333 | free(areq); |
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| 334 | return rc; |
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| 335 | } |
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| 336 | |
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| 337 | ata_add_to_controller_queue(ctrl_minor, areq); |
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| 338 | |
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| 339 | /* wait for request processing... */ |
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| 340 | rc = rtems_semaphore_obtain(areq->sema, RTEMS_WAIT, RTEMS_NO_TIMEOUT); |
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| 341 | if (rc != RTEMS_SUCCESSFUL) |
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| 342 | { |
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| 343 | free(areq); |
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| 344 | return rc; |
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| 345 | } |
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| 346 | |
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| 347 | rtems_semaphore_delete(areq->sema); |
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| 348 | |
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| 349 | /* |
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| 350 | * if no error occurred and if necessary, update internal ata driver data |
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| 351 | * structures to reflect changes (in device configuration, for example) |
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| 352 | */ |
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| 353 | if (areq->status == RTEMS_SUCCESSFUL) |
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| 354 | { |
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| 355 | switch(cmd) |
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| 356 | { |
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| 357 | case ATAIO_SET_MULTIPLE_MODE: |
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| 358 | ATA_DEV_INFO(ctrl_minor, dev).current_multiple = |
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| 359 | *(unsigned8 *)argp; |
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| 360 | break; |
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| 361 | |
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| 362 | default: |
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| 363 | rc = RTEMS_INVALID_NUMBER; |
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| 364 | break; |
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| 365 | } |
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| 366 | } |
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| 367 | else |
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| 368 | { |
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| 369 | /* XXX: should be correct error processing: for ex, may be |
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| 370 | * ABRT and then we should return RTEMS_NOT_IMPLEMENTED |
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| 371 | */ |
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| 372 | rc = RTEMS_IO_ERROR; |
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| 373 | } |
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| 374 | |
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| 375 | /* tell ata driver that controller ready to serve next request */ |
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| 376 | ATA_SEND_EVT(msg, ATA_MSG_SUCCESS_EVT, ctrl_minor, 0); |
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| 377 | |
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| 378 | return rc; |
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| 379 | } |
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| 380 | |
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| 381 | /* ata_process_request -- |
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| 382 | * Get first request from controller's queue and process it. |
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| 383 | * |
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| 384 | * PARAMETERS: |
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| 385 | * ctrl_minor - controller identifier |
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| 386 | * |
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| 387 | * RETURNS: |
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| 388 | * NONE |
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| 389 | */ |
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| 390 | static void |
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| 391 | ata_process_request(rtems_device_minor_number ctrl_minor) |
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| 392 | { |
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| 393 | ata_req_t *areq; |
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| 394 | unsigned16 byte; /* emphasize that only 8 low bits is meaningful */ |
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| 395 | ata_queue_msg_t msg; |
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| 396 | unsigned8 i, dev; |
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| 397 | unsigned16 val; |
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| 398 | unsigned16 data_bs; /* the number of 512-bytes sectors in one |
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| 399 | * data block |
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| 400 | */ |
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| 401 | ISR_Level level; |
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| 402 | |
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| 403 | /* if no requests to controller then do nothing */ |
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| 404 | if (Chain_Is_empty(&ata_ide_ctrls[ctrl_minor].reqs)) |
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| 405 | return; |
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| 406 | |
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| 407 | /* get first request in the controller's queue */ |
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| 408 | _ISR_Disable(level); |
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| 409 | areq = (ata_req_t *)(ata_ide_ctrls[ctrl_minor].reqs.first); |
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| 410 | _ISR_Enable(level); |
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| 411 | |
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| 412 | /* get ATA device identifier (0 or 1) */ |
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| 413 | dev = areq->regs.regs[IDE_REGISTER_DEVICE_HEAD] & |
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| 414 | IDE_REGISTER_DEVICE_HEAD_DEV; |
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| 415 | |
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| 416 | /* get data block size */ |
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| 417 | data_bs = ATA_DEV_INFO(ctrl_minor, dev).current_multiple ? |
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| 418 | ATA_DEV_INFO(ctrl_minor, dev).current_multiple : 1; |
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| 419 | |
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| 420 | /* execute device select protocol */ |
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| 421 | ide_controller_write_register(ctrl_minor, IDE_REGISTER_DEVICE_HEAD, |
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| 422 | areq->regs.regs[IDE_REGISTER_DEVICE_HEAD]); |
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| 423 | |
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| 424 | do { |
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| 425 | ide_controller_read_register(ctrl_minor, IDE_REGISTER_STATUS, &byte); |
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| 426 | } while ((byte & IDE_REGISTER_STATUS_BSY) || |
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| 427 | (!(byte & IDE_REGISTER_STATUS_DRDY))); |
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| 428 | |
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| 429 | /* fill in all necessary registers on the controller */ |
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| 430 | for (i=0; i< ATA_MAX_CMD_REG_OFFSET; i++) |
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| 431 | { |
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| 432 | unsigned32 reg = (1 << i); |
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| 433 | if (areq->regs.to_write & reg) |
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| 434 | ide_controller_write_register(ctrl_minor, i, areq->regs.regs[i]); |
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| 435 | } |
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| 436 | |
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| 437 | /* continue to execute ATA protocols depending on type of request */ |
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| 438 | if (areq->type == ATA_COMMAND_TYPE_PIO_OUT) |
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| 439 | { |
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| 440 | do { |
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| 441 | ide_controller_read_register(ctrl_minor, IDE_REGISTER_STATUS, |
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| 442 | &byte); |
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| 443 | } while (byte & IDE_REGISTER_STATUS_BSY); |
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| 444 | |
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| 445 | if (byte & IDE_REGISTER_STATUS_DRQ) |
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| 446 | { |
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| 447 | ide_controller_write_data_block( |
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| 448 | ctrl_minor, |
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| 449 | MIN(data_bs, areq->cnt) * ATA_SECTOR_SIZE, |
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| 450 | areq->breq->bufs, &areq->cbuf, |
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| 451 | &areq->pos); |
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| 452 | areq->cnt -= MIN(data_bs, areq->cnt); |
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| 453 | } |
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| 454 | else |
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| 455 | { |
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| 456 | if (IDE_Controller_Table[ctrl_minor].int_driven == 0) |
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| 457 | { |
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| 458 | ide_controller_read_register( |
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| 459 | ctrl_minor, |
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| 460 | IDE_REGISTER_ALTERNATE_STATUS_OFFSET, |
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| 461 | &val); |
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| 462 | ide_controller_read_register(ctrl_minor, IDE_REGISTER_STATUS, |
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| 463 | &val); |
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| 464 | |
---|
| 465 | ATA_SEND_EVT(msg, ATA_MSG_ERROR_EVT, ctrl_minor, |
---|
| 466 | RTEMS_IO_ERROR); |
---|
| 467 | } |
---|
| 468 | } |
---|
| 469 | } |
---|
| 470 | |
---|
| 471 | if (IDE_Controller_Table[ctrl_minor].int_driven == 0) |
---|
| 472 | { |
---|
| 473 | do { |
---|
| 474 | ide_controller_read_register(ctrl_minor, IDE_REGISTER_STATUS, |
---|
| 475 | &byte); |
---|
| 476 | } while (byte & IDE_REGISTER_STATUS_BSY); |
---|
| 477 | |
---|
| 478 | ATA_SEND_EVT(msg, ATA_MSG_GEN_EVT, ctrl_minor, 0); |
---|
| 479 | } |
---|
| 480 | } |
---|
| 481 | |
---|
| 482 | /* ata_request_done -- |
---|
| 483 | * Extract request from controller queue, execute callback if necessary |
---|
| 484 | * and process next request for the controller. |
---|
| 485 | * |
---|
| 486 | * PARAMETERS: |
---|
| 487 | * areq - ATA request |
---|
| 488 | * ctrl_minor - controller identifier |
---|
| 489 | * status - status with which request has been done |
---|
| 490 | * error - error, if status != RTEMS_SUCCESSFUL |
---|
| 491 | * |
---|
| 492 | * RETURNS: |
---|
| 493 | * NONE |
---|
| 494 | */ |
---|
| 495 | static inline void |
---|
| 496 | ata_request_done(ata_req_t *areq, rtems_device_minor_number ctrl_minor, |
---|
| 497 | rtems_status_code status, int error) |
---|
| 498 | { |
---|
| 499 | preemption_key key; |
---|
| 500 | |
---|
| 501 | assert(areq); |
---|
| 502 | |
---|
| 503 | DISABLE_PREEMPTION(key); |
---|
| 504 | ATA_EXEC_CALLBACK(areq, status, error); |
---|
| 505 | Chain_Extract(&areq->link); |
---|
| 506 | free(areq); |
---|
| 507 | |
---|
| 508 | if (!Chain_Is_empty(&ata_ide_ctrls[ctrl_minor].reqs)) |
---|
| 509 | { |
---|
| 510 | ENABLE_PREEMPTION(key); |
---|
| 511 | ata_process_request(ctrl_minor); |
---|
| 512 | return; |
---|
| 513 | } |
---|
| 514 | ENABLE_PREEMPTION(key); |
---|
| 515 | } |
---|
| 516 | |
---|
| 517 | /* ata_non_data_request_done -- |
---|
| 518 | * Set up request status and release request's semaphore. |
---|
| 519 | * |
---|
| 520 | * PARAMETERS: |
---|
| 521 | * areq - ATA request |
---|
| 522 | * ctrl_minor - controller identifier |
---|
| 523 | * status - status with which request has been done |
---|
| 524 | * error - error, if status != RTEMS_SUCCESSFUL |
---|
| 525 | * |
---|
| 526 | * RETURNS: |
---|
| 527 | * NONE |
---|
| 528 | */ |
---|
| 529 | static inline void |
---|
| 530 | ata_non_data_request_done(ata_req_t *areq, |
---|
| 531 | rtems_device_minor_number ctrl_minor, |
---|
| 532 | rtems_status_code status, int error) |
---|
| 533 | { |
---|
| 534 | areq->status = status; |
---|
| 535 | areq->error = error; |
---|
| 536 | rtems_semaphore_release(areq->sema); |
---|
| 537 | } |
---|
| 538 | |
---|
| 539 | |
---|
| 540 | /* ata_add_to_controller_queue -- |
---|
| 541 | * Add request to the controller's queue. |
---|
| 542 | * |
---|
| 543 | * PARAMETERS: |
---|
| 544 | * ctrl_minor - controller identifier |
---|
| 545 | * areq - ATA request |
---|
| 546 | * |
---|
| 547 | * RETURNS: |
---|
| 548 | * NONE |
---|
| 549 | */ |
---|
| 550 | static void |
---|
| 551 | ata_add_to_controller_queue(rtems_device_minor_number ctrl_minor, |
---|
| 552 | ata_req_t *areq) |
---|
| 553 | { |
---|
| 554 | Chain_Append(&ata_ide_ctrls[ctrl_minor].reqs, &areq->link); |
---|
| 555 | if (Chain_Has_only_one_node(&ata_ide_ctrls[ctrl_minor].reqs)) |
---|
| 556 | { |
---|
| 557 | unsigned16 val; |
---|
| 558 | ata_queue_msg_t msg; |
---|
| 559 | |
---|
| 560 | #ifdef DEBUG |
---|
| 561 | /* |
---|
| 562 | * read IDE_REGISTER_ALTERNATE_STATUS instead IDE_REGISTER_STATUS |
---|
| 563 | * to prevent clearing of pending interrupt |
---|
| 564 | */ |
---|
| 565 | ide_controller_read_register(ctrl_minor, |
---|
| 566 | IDE_REGISTER_ALTERNATE_STATUS, |
---|
| 567 | &val); |
---|
| 568 | if (val & IDE_REGISTER_STATUS_BSY) |
---|
| 569 | return; |
---|
| 570 | #endif |
---|
| 571 | ATA_SEND_EVT(msg, ATA_MSG_PROCESS_NEXT_EVT, ctrl_minor, 0); |
---|
| 572 | } |
---|
| 573 | } |
---|
| 574 | |
---|
| 575 | |
---|
| 576 | /* ata_interrupt_handler -- |
---|
| 577 | * ATA driver interrrupt handler. If interrrupt happend it mapped it to |
---|
| 578 | * controller (controllerS, if a number of controllers share one int line) |
---|
| 579 | * and generates ATA event(s). |
---|
| 580 | * |
---|
| 581 | * PARAMETERS: |
---|
| 582 | * vec - interrupt vector |
---|
| 583 | * |
---|
| 584 | * RETURNS: |
---|
| 585 | * NONE |
---|
| 586 | */ |
---|
| 587 | rtems_isr |
---|
| 588 | ata_interrupt_handler(rtems_vector_number vec) |
---|
| 589 | { |
---|
| 590 | Chain_Node *the_node = ((Chain_Control *)(&ata_int_vec[vec]))->first; |
---|
| 591 | ata_queue_msg_t msg; |
---|
| 592 | unsigned16 byte; /* emphasize that only 8 low bits is meaningful */ |
---|
| 593 | |
---|
| 594 | for ( ; !Chain_Is_tail(&ata_int_vec[vec], the_node) ; ) |
---|
| 595 | { |
---|
| 596 | /* if (1) - is temporary hack - currently I don't know how to identify |
---|
| 597 | * controller which asserted interrupt if few controllers share one |
---|
| 598 | * interrupt line |
---|
| 599 | */ |
---|
| 600 | if (1) |
---|
| 601 | { |
---|
| 602 | msg.ctrl_minor = ((ata_int_st_t *)the_node)->ctrl_minor; |
---|
| 603 | ide_controller_read_register(msg.ctrl_minor, IDE_REGISTER_STATUS, |
---|
| 604 | &byte); |
---|
| 605 | ATA_SEND_EVT(msg, ATA_MSG_GEN_EVT, msg.ctrl_minor, 0); |
---|
| 606 | } |
---|
| 607 | the_node = the_node->next; |
---|
| 608 | } |
---|
| 609 | } |
---|
| 610 | |
---|
| 611 | /* ata_pio_in_protocol -- |
---|
| 612 | * ATA PIO_IN protocol implementation, see specification |
---|
| 613 | * |
---|
| 614 | * PARAMETERS: |
---|
| 615 | * ctrl_minor - controller identifier |
---|
| 616 | * areq - ATA request |
---|
| 617 | * |
---|
| 618 | * RETURNS: |
---|
| 619 | * NONE |
---|
| 620 | */ |
---|
| 621 | static inline void |
---|
| 622 | ata_pio_in_protocol(rtems_device_minor_number ctrl_minor, ata_req_t *areq) |
---|
| 623 | { |
---|
| 624 | unsigned16 bs, val; |
---|
| 625 | unsigned8 dev; |
---|
| 626 | unsigned32 min_val; |
---|
| 627 | ata_queue_msg_t msg; |
---|
| 628 | |
---|
| 629 | dev = areq->regs.regs[IDE_REGISTER_DEVICE_HEAD] & |
---|
| 630 | IDE_REGISTER_DEVICE_HEAD_DEV; |
---|
| 631 | |
---|
| 632 | bs = ATA_DEV_INFO(ctrl_minor, dev).current_multiple ? |
---|
| 633 | ATA_DEV_INFO(ctrl_minor, dev).current_multiple : 1; |
---|
| 634 | min_val = MIN(bs, areq->cnt); |
---|
| 635 | |
---|
| 636 | ide_controller_read_data_block(ctrl_minor, min_val * ATA_SECTOR_SIZE, |
---|
| 637 | areq->breq->bufs, &areq->cbuf, &areq->pos); |
---|
| 638 | |
---|
| 639 | areq->cnt -= min_val; |
---|
| 640 | if (areq->cnt == 0) |
---|
| 641 | { |
---|
| 642 | ata_request_done(areq, ctrl_minor, RTEMS_SUCCESSFUL, RTEMS_SUCCESSFUL); |
---|
| 643 | } |
---|
| 644 | else if (IDE_Controller_Table[ctrl_minor].int_driven == 0) |
---|
| 645 | { |
---|
| 646 | do { |
---|
| 647 | ide_controller_read_register(ctrl_minor, IDE_REGISTER_STATUS, &val); |
---|
| 648 | } while (val & IDE_REGISTER_STATUS_BSY); |
---|
| 649 | |
---|
| 650 | ATA_SEND_EVT(msg, ATA_MSG_GEN_EVT, ctrl_minor, 0); |
---|
| 651 | } |
---|
| 652 | } |
---|
| 653 | |
---|
| 654 | /* ata_pio_out_protocol -- |
---|
| 655 | * ATA PIO_OUT protocol implementation, see specification |
---|
| 656 | * |
---|
| 657 | * PARAMETERS: |
---|
| 658 | * ctrl_minor - controller identifier |
---|
| 659 | * areq - ATA request |
---|
| 660 | * |
---|
| 661 | * RETURNS: |
---|
| 662 | * NONE |
---|
| 663 | */ |
---|
| 664 | static inline void |
---|
| 665 | ata_pio_out_protocol(rtems_device_minor_number ctrl_minor, ata_req_t *areq) |
---|
| 666 | { |
---|
| 667 | unsigned16 bs, val; |
---|
| 668 | unsigned8 dev; |
---|
| 669 | unsigned32 min_val; |
---|
| 670 | ata_queue_msg_t msg; |
---|
| 671 | |
---|
| 672 | dev = areq->regs.regs[IDE_REGISTER_DEVICE_HEAD] & |
---|
| 673 | IDE_REGISTER_DEVICE_HEAD_DEV; |
---|
| 674 | |
---|
| 675 | bs = ATA_DEV_INFO(ctrl_minor, dev).current_multiple ? |
---|
| 676 | ATA_DEV_INFO(ctrl_minor, dev).current_multiple : 1; |
---|
| 677 | |
---|
| 678 | min_val = MIN(bs, areq->cnt); |
---|
| 679 | |
---|
| 680 | if (areq->cnt == 0) |
---|
| 681 | { |
---|
| 682 | ata_request_done(areq, ctrl_minor, RTEMS_SUCCESSFUL, RTEMS_SUCCESSFUL); |
---|
| 683 | } |
---|
| 684 | else |
---|
| 685 | { |
---|
| 686 | ide_controller_write_data_block(ctrl_minor, min_val * ATA_SECTOR_SIZE, |
---|
| 687 | areq->breq->bufs, &areq->cbuf, |
---|
| 688 | &areq->pos); |
---|
| 689 | areq->cnt -= min_val; |
---|
| 690 | if (IDE_Controller_Table[ctrl_minor].int_driven == 0) |
---|
| 691 | { |
---|
| 692 | do { |
---|
| 693 | ide_controller_read_register(ctrl_minor, IDE_REGISTER_STATUS, |
---|
| 694 | &val); |
---|
| 695 | } while (val & IDE_REGISTER_STATUS_BSY); |
---|
| 696 | |
---|
| 697 | ATA_SEND_EVT(msg, ATA_MSG_GEN_EVT, ctrl_minor, 0); |
---|
| 698 | } |
---|
| 699 | } |
---|
| 700 | } |
---|
| 701 | |
---|
| 702 | /* ata_queue_task -- |
---|
| 703 | * Task which manages ATA driver events queue. |
---|
| 704 | * |
---|
| 705 | * PARAMETERS: |
---|
| 706 | * arg - ignored |
---|
| 707 | * |
---|
| 708 | * RETURNS: |
---|
| 709 | * NONE |
---|
| 710 | * |
---|
| 711 | * NOTES: |
---|
| 712 | * should be non-preemptive |
---|
| 713 | */ |
---|
| 714 | static rtems_task |
---|
| 715 | ata_queue_task(rtems_task_argument arg) |
---|
| 716 | { |
---|
| 717 | ata_queue_msg_t msg; |
---|
| 718 | rtems_unsigned32 size; |
---|
| 719 | ata_req_t *areq; |
---|
| 720 | rtems_device_minor_number ctrl_minor; |
---|
| 721 | unsigned16 val; |
---|
| 722 | unsigned16 val1; |
---|
| 723 | rtems_status_code rc; |
---|
| 724 | ISR_Level level; |
---|
| 725 | |
---|
| 726 | while (1) |
---|
| 727 | { |
---|
| 728 | /* get event which has happend */ |
---|
| 729 | rc = rtems_message_queue_receive(ata_queue_id, &msg, &size, RTEMS_WAIT, |
---|
| 730 | RTEMS_NO_TIMEOUT); |
---|
| 731 | if (rc != RTEMS_SUCCESSFUL) |
---|
| 732 | rtems_fatal_error_occurred(RTEMS_INTERNAL_ERROR); |
---|
| 733 | |
---|
| 734 | /* get controller on which event has happend */ |
---|
| 735 | ctrl_minor = msg.ctrl_minor; |
---|
| 736 | |
---|
| 737 | /* get current request to the controller */ |
---|
| 738 | _ISR_Disable(level); |
---|
| 739 | areq = (ata_req_t *)(ata_ide_ctrls[ctrl_minor].reqs.first); |
---|
| 740 | _ISR_Enable(level); |
---|
| 741 | |
---|
| 742 | switch(msg.type) |
---|
| 743 | { |
---|
| 744 | case ATA_MSG_PROCESS_NEXT_EVT: |
---|
| 745 | /* process next request in the controller queue */ |
---|
| 746 | ata_process_request(ctrl_minor); |
---|
| 747 | break; |
---|
| 748 | |
---|
| 749 | case ATA_MSG_SUCCESS_EVT: |
---|
| 750 | /* |
---|
| 751 | * finish processing of current request with successful |
---|
| 752 | * status and start processing of the next request in the |
---|
| 753 | * controller queue |
---|
| 754 | */ |
---|
| 755 | ata_request_done(areq, ctrl_minor, RTEMS_SUCCESSFUL, |
---|
| 756 | msg.error); |
---|
| 757 | break; |
---|
| 758 | |
---|
| 759 | case ATA_MSG_ERROR_EVT: |
---|
| 760 | /* |
---|
| 761 | * finish processing of current request with error |
---|
| 762 | * status and start processing of the next request in the |
---|
| 763 | * controller queue |
---|
| 764 | */ |
---|
| 765 | ata_request_done(areq, ctrl_minor, RTEMS_UNSATISFIED, |
---|
| 766 | msg.error); |
---|
| 767 | break; |
---|
| 768 | |
---|
| 769 | case ATA_MSG_GEN_EVT: |
---|
| 770 | /* |
---|
| 771 | * continue processing of the current request to the |
---|
| 772 | * controller according to current request state and |
---|
| 773 | * ATA protocol |
---|
| 774 | */ |
---|
| 775 | ide_controller_read_register(ctrl_minor, IDE_REGISTER_STATUS, |
---|
| 776 | &val); |
---|
| 777 | /* process error case */ |
---|
| 778 | if (val & IDE_REGISTER_STATUS_ERR) |
---|
| 779 | { |
---|
| 780 | ide_controller_read_register(ctrl_minor, |
---|
| 781 | IDE_REGISTER_ERROR, |
---|
| 782 | &val); |
---|
| 783 | if (areq->type == ATA_COMMAND_TYPE_NON_DATA) |
---|
| 784 | ata_non_data_request_done(areq, ctrl_minor, |
---|
| 785 | RTEMS_UNSATISFIED, |
---|
| 786 | RTEMS_IO_ERROR); |
---|
| 787 | else |
---|
| 788 | ata_request_done(areq, ctrl_minor, RTEMS_UNSATISFIED, |
---|
| 789 | RTEMS_IO_ERROR); |
---|
| 790 | break; |
---|
| 791 | } |
---|
| 792 | |
---|
| 793 | switch(areq->type) |
---|
| 794 | { |
---|
| 795 | case ATA_COMMAND_TYPE_PIO_IN: |
---|
| 796 | ata_pio_in_protocol(ctrl_minor, areq); |
---|
| 797 | break; |
---|
| 798 | |
---|
| 799 | case ATA_COMMAND_TYPE_PIO_OUT: |
---|
| 800 | ata_pio_out_protocol(ctrl_minor, areq); |
---|
| 801 | break; |
---|
| 802 | |
---|
| 803 | case ATA_COMMAND_TYPE_NON_DATA: |
---|
| 804 | ide_controller_read_register(ctrl_minor, |
---|
| 805 | IDE_REGISTER_ERROR, |
---|
| 806 | &val1); |
---|
| 807 | ata_non_data_request_done(areq, ctrl_minor, |
---|
| 808 | RTEMS_SUCCESSFUL, |
---|
| 809 | val1); |
---|
| 810 | break; |
---|
| 811 | |
---|
| 812 | default: |
---|
| 813 | printf("ata_queue_task: non-supported command type\n"); |
---|
| 814 | ata_request_done(areq, ctrl_minor, |
---|
| 815 | RTEMS_UNSATISFIED, |
---|
| 816 | RTEMS_NOT_IMPLEMENTED); |
---|
| 817 | break; |
---|
| 818 | } |
---|
| 819 | break; |
---|
| 820 | |
---|
| 821 | default: |
---|
| 822 | rtems_fatal_error_occurred(RTEMS_INTERNAL_ERROR); |
---|
| 823 | break; |
---|
| 824 | } |
---|
| 825 | } |
---|
| 826 | } |
---|
| 827 | |
---|
| 828 | /* ata_ioctl -- |
---|
| 829 | * ATA driver ioctl interface. |
---|
| 830 | * |
---|
| 831 | * PARAMETERS: |
---|
| 832 | * device - device identifier |
---|
| 833 | * cmd - command |
---|
| 834 | * argp - arguments |
---|
| 835 | * |
---|
| 836 | * RETURNS: |
---|
| 837 | * depend on 'cmd' |
---|
| 838 | */ |
---|
| 839 | int |
---|
| 840 | ata_ioctl(dev_t device, int cmd, void *argp) |
---|
| 841 | { |
---|
| 842 | rtems_status_code status; |
---|
| 843 | rtems_device_minor_number rel_minor; |
---|
| 844 | |
---|
| 845 | rel_minor = (rtems_filesystem_dev_minor_t(device)) / |
---|
| 846 | ATA_MINOR_NUM_RESERVED_PER_ATA_DEVICE; |
---|
| 847 | |
---|
| 848 | /* |
---|
| 849 | * in most cases this means that device 'device' is not an registred ATA |
---|
| 850 | * device |
---|
| 851 | */ |
---|
| 852 | if (ata_devs[rel_minor].device == ATA_UNDEFINED_VALUE) |
---|
| 853 | { |
---|
| 854 | errno = ENODEV; |
---|
| 855 | return -1; |
---|
| 856 | } |
---|
| 857 | |
---|
| 858 | switch (cmd) |
---|
| 859 | { |
---|
| 860 | case BLKIO_REQUEST: |
---|
| 861 | status = ata_io_data_request(device, (blkdev_request *)argp); |
---|
| 862 | break; |
---|
| 863 | |
---|
| 864 | case ATAIO_SET_MULTIPLE_MODE: |
---|
| 865 | status = ata_non_data_request(device, cmd, argp); |
---|
| 866 | break; |
---|
| 867 | |
---|
| 868 | default: |
---|
| 869 | errno = EBADRQC; |
---|
| 870 | return -1; |
---|
| 871 | break; |
---|
| 872 | } |
---|
| 873 | |
---|
| 874 | if (status != RTEMS_SUCCESSFUL) |
---|
| 875 | { |
---|
| 876 | errno = EIO; |
---|
| 877 | return -1; |
---|
| 878 | } |
---|
| 879 | return 0; |
---|
| 880 | } |
---|
| 881 | |
---|
| 882 | /* |
---|
| 883 | * ata_initialize -- |
---|
| 884 | * Initializes all ATA devices found on initialized IDE controllers. |
---|
| 885 | * |
---|
| 886 | * PARAMETERS: |
---|
| 887 | * major - device major number |
---|
| 888 | * minor - device minor number |
---|
| 889 | * args - arguments |
---|
| 890 | * |
---|
| 891 | * RETURNS: |
---|
| 892 | * RTEMS_SUCCESSFUL on success, or error code if |
---|
| 893 | * error occured |
---|
| 894 | */ |
---|
| 895 | rtems_device_driver |
---|
| 896 | ata_initialize(rtems_device_major_number major, |
---|
| 897 | rtems_device_minor_number minor_arg, |
---|
| 898 | void *args) |
---|
| 899 | { |
---|
| 900 | unsigned32 ctrl_minor; |
---|
| 901 | rtems_status_code status; |
---|
| 902 | ata_req_t areq; |
---|
| 903 | blkdev_request1 breq; |
---|
| 904 | unsigned8 i, dev = 0; |
---|
| 905 | unsigned16 *buffer; |
---|
| 906 | unsigned16 ec; |
---|
| 907 | char name[ATA_MAX_NAME_LENGTH]; |
---|
| 908 | dev_t device; |
---|
| 909 | ata_int_st_t *int_st; |
---|
| 910 | rtems_isr_entry old_isr; |
---|
| 911 | |
---|
| 912 | if (ata_initialized) |
---|
| 913 | return RTEMS_SUCCESSFUL; |
---|
| 914 | |
---|
| 915 | /* initialization of disk devices library */ |
---|
| 916 | status = rtems_disk_io_initialize(); |
---|
| 917 | if (status != RTEMS_SUCCESSFUL) |
---|
| 918 | return status; |
---|
| 919 | |
---|
| 920 | /* create queue for asynchronous requests handling */ |
---|
| 921 | status = rtems_message_queue_create( |
---|
| 922 | rtems_build_name('A', 'T', 'A', 'Q'), |
---|
| 923 | ATA_DRIVER_MESSAGE_QUEUE_SIZE, |
---|
| 924 | sizeof(ata_queue_msg_t), |
---|
| 925 | RTEMS_FIFO | RTEMS_LOCAL, |
---|
| 926 | &ata_queue_id); |
---|
| 927 | if (status != RTEMS_SUCCESSFUL) |
---|
| 928 | { |
---|
| 929 | rtems_disk_io_done(); |
---|
| 930 | return status; |
---|
| 931 | } |
---|
| 932 | |
---|
| 933 | /* |
---|
| 934 | * create ATA driver task, see comments for task implementation for |
---|
| 935 | * details |
---|
| 936 | */ |
---|
| 937 | status = rtems_task_create( |
---|
| 938 | rtems_build_name ('A', 'T', 'A', 'T'), |
---|
| 939 | ATA_DRIVER_TASK_PRIORITY, |
---|
| 940 | ATA_DRIVER_TASK_STACK_SIZE, |
---|
| 941 | RTEMS_PREEMPT | RTEMS_NO_TIMESLICE | RTEMS_ASR | |
---|
| 942 | RTEMS_INTERRUPT_LEVEL(0), |
---|
| 943 | RTEMS_NO_FLOATING_POINT | RTEMS_LOCAL, |
---|
| 944 | &ata_task_id); |
---|
| 945 | if (status != RTEMS_SUCCESSFUL) |
---|
| 946 | { |
---|
| 947 | rtems_message_queue_delete(ata_queue_id); |
---|
| 948 | rtems_disk_io_done(); |
---|
| 949 | return status; |
---|
| 950 | } |
---|
| 951 | |
---|
| 952 | /* |
---|
| 953 | * start ATA driver task. Actually the task will not start immediately - |
---|
| 954 | * it will start only after multitasking support will be started |
---|
| 955 | */ |
---|
| 956 | status = rtems_task_start(ata_task_id, ata_queue_task, 0); |
---|
| 957 | if (status != RTEMS_SUCCESSFUL) |
---|
| 958 | { |
---|
| 959 | rtems_task_delete(ata_task_id); |
---|
| 960 | rtems_message_queue_delete(ata_queue_id); |
---|
| 961 | rtems_disk_io_done(); |
---|
| 962 | return status; |
---|
| 963 | } |
---|
| 964 | |
---|
| 965 | buffer = (unsigned16 *)malloc(ATA_SECTOR_SIZE); |
---|
| 966 | if (buffer == NULL) |
---|
| 967 | { |
---|
| 968 | rtems_task_delete(ata_task_id); |
---|
| 969 | rtems_message_queue_delete(ata_queue_id); |
---|
| 970 | rtems_disk_io_done(); |
---|
| 971 | return RTEMS_NO_MEMORY; |
---|
| 972 | } |
---|
| 973 | |
---|
| 974 | ata_devs_number = 0; |
---|
| 975 | |
---|
| 976 | for (i = 0; i < (2 * IDE_CTRL_MAX_MINOR_NUMBER); i++) |
---|
| 977 | ata_devs[i].device = ATA_UNDEFINED_VALUE; |
---|
| 978 | |
---|
| 979 | /* prepare ATA driver for handling interrupt driven devices */ |
---|
| 980 | for (i = 0; i < ATA_MAX_RTEMS_INT_VEC_NUMBER; i++) |
---|
| 981 | Chain_Initialize_empty(&ata_int_vec[i]); |
---|
| 982 | |
---|
| 983 | /* |
---|
| 984 | * during ATA driver initialization EXECUTE DEVICE DIAGNOSTIC and |
---|
| 985 | * IDENTIFY DEVICE ATA command should be issued; for these purposes ATA |
---|
| 986 | * requests should be formed; ATA requests contain block device request, |
---|
| 987 | * so form block device request first |
---|
| 988 | */ |
---|
| 989 | memset(&breq, 0, sizeof(blkdev_request1)); |
---|
| 990 | breq.req.req_done = NULL; |
---|
| 991 | breq.req.done_arg = &breq; |
---|
| 992 | breq.req.bufnum = 1; |
---|
| 993 | breq.req.count = 1; |
---|
| 994 | breq.req.bufs[0].length = ATA_SECTOR_SIZE; |
---|
| 995 | breq.req.bufs[0].buffer = buffer; |
---|
| 996 | |
---|
| 997 | /* |
---|
| 998 | * for each presented IDE controller execute EXECUTE DEVICE DIAGNOSTIC |
---|
| 999 | * ATA command; for each found device execute IDENTIFY DEVICE ATA |
---|
| 1000 | * command |
---|
| 1001 | */ |
---|
| 1002 | for (ctrl_minor = 0; ctrl_minor < IDE_Controller_Count; ctrl_minor++) |
---|
| 1003 | if (IDE_Controller_Table[ctrl_minor].status == IDE_CTRL_INITIALIZED) |
---|
| 1004 | { |
---|
| 1005 | Chain_Initialize_empty(&ata_ide_ctrls[ctrl_minor].reqs); |
---|
| 1006 | |
---|
| 1007 | if (IDE_Controller_Table[ctrl_minor].int_driven == TRUE) |
---|
| 1008 | { |
---|
| 1009 | int_st = malloc(sizeof(ata_int_st_t)); |
---|
| 1010 | if (int_st == NULL) |
---|
| 1011 | { |
---|
| 1012 | free(buffer); |
---|
| 1013 | rtems_task_delete(ata_task_id); |
---|
| 1014 | rtems_message_queue_delete(ata_queue_id); |
---|
| 1015 | rtems_disk_io_done(); |
---|
| 1016 | return RTEMS_NO_MEMORY; |
---|
| 1017 | } |
---|
| 1018 | |
---|
| 1019 | int_st->ctrl_minor = ctrl_minor; |
---|
| 1020 | |
---|
| 1021 | status = rtems_interrupt_catch( |
---|
| 1022 | ata_interrupt_handler, |
---|
| 1023 | IDE_Controller_Table[ctrl_minor].int_vec, |
---|
| 1024 | &old_isr); |
---|
| 1025 | if (status != RTEMS_SUCCESSFUL) |
---|
| 1026 | { |
---|
| 1027 | free(int_st); |
---|
| 1028 | free(buffer); |
---|
| 1029 | rtems_task_delete(ata_task_id); |
---|
| 1030 | rtems_message_queue_delete(ata_queue_id); |
---|
| 1031 | rtems_disk_io_done(); |
---|
| 1032 | return status; |
---|
| 1033 | } |
---|
| 1034 | Chain_Append( |
---|
| 1035 | &ata_int_vec[IDE_Controller_Table[ctrl_minor].int_vec], |
---|
| 1036 | &int_st->link); |
---|
| 1037 | |
---|
| 1038 | /* disable interrupts */ |
---|
| 1039 | ide_controller_write_register(ctrl_minor, |
---|
| 1040 | IDE_REGISTER_DEVICE_CONTROL_OFFSET, |
---|
| 1041 | IDE_REGISTER_DEVICE_CONTROL_nIEN); |
---|
| 1042 | } |
---|
| 1043 | |
---|
| 1044 | /* |
---|
| 1045 | * Issue EXECUTE DEVICE DIAGNOSTIC ATA command for explore is |
---|
| 1046 | * there any ATA device on the controller. |
---|
| 1047 | */ |
---|
| 1048 | memset(&areq, 0, sizeof(ata_req_t)); |
---|
| 1049 | areq.type = ATA_COMMAND_TYPE_NON_DATA; |
---|
| 1050 | areq.regs.to_write = ATA_REGISTERS_VALUE(IDE_REGISTER_COMMAND); |
---|
| 1051 | areq.regs.regs[IDE_REGISTER_COMMAND] = |
---|
| 1052 | ATA_COMMAND_EXECUTE_DEVICE_DIAGNOSTIC; |
---|
| 1053 | areq.regs.to_read = ATA_REGISTERS_VALUE(IDE_REGISTER_ERROR); |
---|
| 1054 | |
---|
| 1055 | areq.breq = (blkdev_request *)&breq; |
---|
| 1056 | |
---|
| 1057 | /* |
---|
| 1058 | * Process the request. Special processing of requests on |
---|
| 1059 | * initialization phase is needed because at this moment there |
---|
| 1060 | * is no multitasking enviroment |
---|
| 1061 | */ |
---|
| 1062 | ata_process_request_on_init_phase(ctrl_minor, &areq); |
---|
| 1063 | |
---|
| 1064 | /* |
---|
| 1065 | * check status of I/O operation |
---|
| 1066 | */ |
---|
| 1067 | if (breq.req.status != RTEMS_SUCCESSFUL) |
---|
| 1068 | continue; |
---|
| 1069 | |
---|
| 1070 | /* disassemble returned diagnostic codes */ |
---|
| 1071 | if (breq.req.error == ATA_DEV0_PASSED_DEV1_PASSED_OR_NOT_PRSNT) |
---|
| 1072 | { |
---|
| 1073 | ATA_DEV_INFO(ctrl_minor, 0).present = 1; |
---|
| 1074 | ATA_DEV_INFO(ctrl_minor,1).present = 1; |
---|
| 1075 | } |
---|
| 1076 | else if (breq.req.error == ATA_DEV0_PASSED_DEV1_FAILED) |
---|
| 1077 | { |
---|
| 1078 | ATA_DEV_INFO(ctrl_minor,0).present = 1; |
---|
| 1079 | ATA_DEV_INFO(ctrl_minor,1).present = 0; |
---|
| 1080 | } |
---|
| 1081 | else if (breq.req.error < ATA_DEV1_PASSED_DEV0_FAILED) |
---|
| 1082 | { |
---|
| 1083 | ATA_DEV_INFO(ctrl_minor,0).present = 0; |
---|
| 1084 | ATA_DEV_INFO(ctrl_minor,1).present = 1; |
---|
| 1085 | } |
---|
| 1086 | else |
---|
| 1087 | { |
---|
| 1088 | ATA_DEV_INFO(ctrl_minor, 0).present = 0; |
---|
| 1089 | ATA_DEV_INFO(ctrl_minor, 1).present = 0; |
---|
| 1090 | } |
---|
| 1091 | |
---|
| 1092 | /* refine the returned codes */ |
---|
| 1093 | if (ATA_DEV_INFO(ctrl_minor, 1).present != 0) |
---|
| 1094 | { |
---|
| 1095 | ide_controller_read_register(ctrl_minor, IDE_REGISTER_ERROR, &ec); |
---|
| 1096 | if (ec & ATA_DEV1_PASSED_DEV0_FAILED) |
---|
| 1097 | ATA_DEV_INFO(ctrl_minor, 1).present = 1; |
---|
| 1098 | else |
---|
| 1099 | ATA_DEV_INFO(ctrl_minor, 1).present = 0; |
---|
| 1100 | } |
---|
| 1101 | |
---|
| 1102 | /* for each found ATA device obtain it configuration */ |
---|
| 1103 | for (dev = 0; dev < 2; dev++) |
---|
| 1104 | if (ATA_DEV_INFO(ctrl_minor, dev).present) |
---|
| 1105 | { |
---|
| 1106 | /* |
---|
| 1107 | * Issue DEVICE IDENTIFY ATA command and get device |
---|
| 1108 | * configuration |
---|
| 1109 | */ |
---|
| 1110 | memset(&areq, 0, sizeof(ata_req_t)); |
---|
| 1111 | areq.type = ATA_COMMAND_TYPE_PIO_IN; |
---|
| 1112 | areq.regs.to_write = ATA_REGISTERS_VALUE(IDE_REGISTER_COMMAND); |
---|
| 1113 | areq.regs.regs[IDE_REGISTER_COMMAND] = |
---|
| 1114 | ATA_COMMAND_IDENTIFY_DEVICE; |
---|
| 1115 | areq.regs.to_read = ATA_REGISTERS_VALUE(IDE_REGISTER_STATUS); |
---|
| 1116 | areq.breq = (blkdev_request *)&breq; |
---|
| 1117 | |
---|
| 1118 | areq.cnt = breq.req.count; |
---|
| 1119 | |
---|
| 1120 | areq.regs.regs[IDE_REGISTER_DEVICE_HEAD] |= |
---|
| 1121 | (dev << IDE_REGISTER_DEVICE_HEAD_DEV_POS); |
---|
| 1122 | |
---|
| 1123 | /* |
---|
| 1124 | * Process the request. Special processing of requests on |
---|
| 1125 | * initialization phase is needed because at this moment there |
---|
| 1126 | * is no multitasking enviroment |
---|
| 1127 | */ |
---|
| 1128 | ata_process_request_on_init_phase(ctrl_minor, &areq); |
---|
| 1129 | |
---|
| 1130 | /* check status of I/O operation */ |
---|
| 1131 | if (breq.req.status != RTEMS_SUCCESSFUL) |
---|
| 1132 | continue; |
---|
| 1133 | |
---|
| 1134 | /* |
---|
| 1135 | * Parse returned device configuration and fill in ATA internal |
---|
| 1136 | * device info structure |
---|
| 1137 | */ |
---|
| 1138 | ATA_DEV_INFO(ctrl_minor, dev).cylinders = |
---|
| 1139 | CF_LE_W(buffer[ATA_IDENT_WORD_NUM_OF_CURR_LOG_CLNDS]); |
---|
| 1140 | ATA_DEV_INFO(ctrl_minor, dev).heads = |
---|
| 1141 | CF_LE_W(buffer[ATA_IDENT_WORD_NUM_OF_CURR_LOG_HEADS]); |
---|
| 1142 | ATA_DEV_INFO(ctrl_minor, dev).sectors = |
---|
| 1143 | CF_LE_W(buffer[ATA_IDENT_WORD_NUM_OF_CURR_LOG_SECS]); |
---|
| 1144 | ATA_DEV_INFO(ctrl_minor, dev).lba_sectors = |
---|
| 1145 | (CF_LE_W(buffer[ATA_IDENT_WORD_NUM_OF_USR_SECS0]) << 16) + |
---|
| 1146 | CF_LE_W(buffer[ATA_IDENT_WORD_NUM_OF_USR_SECS1]); |
---|
| 1147 | ATA_DEV_INFO(ctrl_minor, dev).lba_avaible = |
---|
| 1148 | (CF_LE_W(buffer[ATA_IDENT_WORD_CAPABILITIES]) >> 9) & 0x1; |
---|
| 1149 | ATA_DEV_INFO(ctrl_minor, dev).max_multiple = |
---|
| 1150 | (unsigned8) (CF_LE_W(buffer[ATA_IDENT_WORD_RW_MULT])); |
---|
| 1151 | ATA_DEV_INFO(ctrl_minor, dev).current_multiple = |
---|
| 1152 | (CF_LE_W(buffer[ATA_IDENT_WORD_MULT_SECS]) & 0x100) ? |
---|
| 1153 | (unsigned8)(CF_LE_W(buffer[ATA_IDENT_WORD_MULT_SECS])) : |
---|
| 1154 | 0; |
---|
| 1155 | |
---|
| 1156 | if ((CF_LE_W(buffer[ATA_IDENT_WORD_FIELD_VALIDITY]) & |
---|
[dbe06865] | 1157 | ATA_IDENT_BIT_VALID) == 0) { |
---|
| 1158 | /* no "supported modes" info -> use default */ |
---|
| 1159 | ATA_DEV_INFO(ctrl_minor, dev).mode_active = ATA_MODES_PIO3; |
---|
| 1160 | } |
---|
| 1161 | else { |
---|
| 1162 | ATA_DEV_INFO(ctrl_minor, dev).modes_avaible = |
---|
| 1163 | ((CF_LE_W(buffer[64]) & 0x1) ? ATA_MODES_PIO3 : 0) | |
---|
| 1164 | ((CF_LE_W(buffer[64]) & 0x2) ? ATA_MODES_PIO4 : 0) | |
---|
| 1165 | ((CF_LE_W(buffer[63]) & 0x1) ? ATA_MODES_DMA0 : 0) | |
---|
| 1166 | ((CF_LE_W(buffer[63]) & 0x2) ? |
---|
| 1167 | ATA_MODES_DMA0 | ATA_MODES_DMA1 : 0) | |
---|
| 1168 | ((CF_LE_W(buffer[63]) & 0x4) ? |
---|
| 1169 | ATA_MODES_DMA0 | ATA_MODES_DMA1 | ATA_MODES_DMA2 : 0); |
---|
| 1170 | if (ATA_DEV_INFO(ctrl_minor, dev).modes_avaible == 0) |
---|
[ef142d7] | 1171 | continue; |
---|
[dbe06865] | 1172 | /* |
---|
| 1173 | * choose most appropriate ATA device data I/O speed supported |
---|
| 1174 | * by the controller |
---|
| 1175 | */ |
---|
| 1176 | status = ide_controller_config_io_speed( |
---|
[ef142d7] | 1177 | ctrl_minor, |
---|
| 1178 | ATA_DEV_INFO(ctrl_minor, dev).modes_avaible); |
---|
[dbe06865] | 1179 | if (status != RTEMS_SUCCESSFUL) |
---|
[ef142d7] | 1180 | continue; |
---|
[dbe06865] | 1181 | } |
---|
[ef142d7] | 1182 | /* |
---|
| 1183 | * Ok, let register new ATA device in the system |
---|
| 1184 | */ |
---|
| 1185 | ata_devs[ata_devs_number].ctrl_minor = ctrl_minor; |
---|
| 1186 | ata_devs[ata_devs_number].device = dev; |
---|
| 1187 | |
---|
| 1188 | snprintf(name, ATA_MAX_NAME_LENGTH, "/dev/hd%c", |
---|
| 1189 | 'a' + 2 * ctrl_minor + dev); |
---|
| 1190 | device = rtems_filesystem_make_dev_t( |
---|
| 1191 | major, |
---|
| 1192 | (ata_devs_number * |
---|
| 1193 | ATA_MINOR_NUM_RESERVED_PER_ATA_DEVICE)); |
---|
| 1194 | |
---|
| 1195 | status = rtems_disk_create_phys(device, ATA_SECTOR_SIZE, |
---|
| 1196 | ATA_DEV_INFO(ctrl_minor, dev).lba_avaible ? |
---|
| 1197 | ATA_DEV_INFO(ctrl_minor, dev).lba_sectors : |
---|
| 1198 | (ATA_DEV_INFO(ctrl_minor, dev).heads * |
---|
| 1199 | ATA_DEV_INFO(ctrl_minor, dev).cylinders * |
---|
| 1200 | ATA_DEV_INFO(ctrl_minor, dev).sectors), |
---|
| 1201 | (block_device_ioctl) ata_ioctl, name); |
---|
| 1202 | if (status != RTEMS_SUCCESSFUL) |
---|
| 1203 | { |
---|
| 1204 | ata_devs[ata_devs_number].device = ATA_UNDEFINED_VALUE; |
---|
| 1205 | continue; |
---|
| 1206 | } |
---|
| 1207 | ata_devs_number++; |
---|
| 1208 | } |
---|
| 1209 | if (IDE_Controller_Table[ctrl_minor].int_driven == TRUE) |
---|
| 1210 | { |
---|
| 1211 | ide_controller_write_register(ctrl_minor, |
---|
| 1212 | IDE_REGISTER_DEVICE_CONTROL_OFFSET, |
---|
| 1213 | 0x00); |
---|
| 1214 | } |
---|
| 1215 | } |
---|
| 1216 | |
---|
| 1217 | free(buffer); |
---|
| 1218 | ata_initialized = TRUE; |
---|
| 1219 | return RTEMS_SUCCESSFUL; |
---|
| 1220 | } |
---|
| 1221 | |
---|
| 1222 | /* ata_process_request_on_init_phase -- |
---|
| 1223 | * Process the ATA request during system initialization. Request |
---|
| 1224 | * processing is syncronous and doesn't use multiprocessing enviroment. |
---|
| 1225 | * |
---|
| 1226 | * PARAMETERS: |
---|
| 1227 | * ctrl_minor - controller identifier |
---|
| 1228 | * areq - ATA request |
---|
| 1229 | * |
---|
| 1230 | * RETURNS: |
---|
| 1231 | * NONE |
---|
| 1232 | */ |
---|
| 1233 | static void |
---|
| 1234 | ata_process_request_on_init_phase(rtems_device_minor_number ctrl_minor, |
---|
| 1235 | ata_req_t *areq) |
---|
| 1236 | { |
---|
| 1237 | unsigned16 byte;/* emphasize that only 8 low bits is meaningful */ |
---|
| 1238 | unsigned8 i, dev; |
---|
| 1239 | unsigned16 val, val1; |
---|
| 1240 | unsigned16 data_bs; /* the number of 512 bytes sectors into one |
---|
| 1241 | * data block |
---|
| 1242 | */ |
---|
| 1243 | assert(areq); |
---|
| 1244 | |
---|
| 1245 | dev = areq->regs.regs[IDE_REGISTER_DEVICE_HEAD] & |
---|
| 1246 | IDE_REGISTER_DEVICE_HEAD_DEV; |
---|
| 1247 | |
---|
| 1248 | data_bs = ATA_DEV_INFO(ctrl_minor, dev).current_multiple ? |
---|
| 1249 | ATA_DEV_INFO(ctrl_minor, dev).current_multiple : 1; |
---|
| 1250 | |
---|
| 1251 | ide_controller_write_register(ctrl_minor, IDE_REGISTER_DEVICE_HEAD, |
---|
| 1252 | areq->regs.regs[IDE_REGISTER_DEVICE_HEAD]); |
---|
| 1253 | |
---|
| 1254 | do { |
---|
| 1255 | ide_controller_read_register(ctrl_minor, IDE_REGISTER_STATUS, &byte); |
---|
| 1256 | } while ((byte & IDE_REGISTER_STATUS_BSY) || |
---|
| 1257 | (!(byte & IDE_REGISTER_STATUS_DRDY))); |
---|
| 1258 | |
---|
| 1259 | for (i=0; i< ATA_MAX_CMD_REG_OFFSET; i++) |
---|
| 1260 | { |
---|
| 1261 | unsigned32 reg = (1 << i); |
---|
| 1262 | if (areq->regs.to_write & reg) |
---|
| 1263 | ide_controller_write_register(ctrl_minor, i, |
---|
| 1264 | areq->regs.regs[i]); |
---|
| 1265 | } |
---|
| 1266 | |
---|
| 1267 | do { |
---|
| 1268 | ide_controller_read_register(ctrl_minor, IDE_REGISTER_STATUS, &byte); |
---|
| 1269 | } while (byte & IDE_REGISTER_STATUS_BSY); |
---|
| 1270 | |
---|
| 1271 | ide_controller_read_register(ctrl_minor, IDE_REGISTER_STATUS, &val); |
---|
| 1272 | ide_controller_read_register(ctrl_minor, IDE_REGISTER_ERROR, &val1); |
---|
| 1273 | |
---|
| 1274 | if (val & IDE_REGISTER_STATUS_ERR) |
---|
| 1275 | { |
---|
| 1276 | areq->breq->status = RTEMS_UNSATISFIED; |
---|
| 1277 | areq->breq->error = RTEMS_IO_ERROR; |
---|
| 1278 | return; |
---|
| 1279 | } |
---|
| 1280 | |
---|
| 1281 | switch(areq->type) |
---|
| 1282 | { |
---|
| 1283 | case ATA_COMMAND_TYPE_PIO_IN: |
---|
| 1284 | ide_controller_read_data_block( |
---|
| 1285 | ctrl_minor, |
---|
| 1286 | MIN(data_bs, areq->cnt) * ATA_SECTOR_SIZE, |
---|
| 1287 | areq->breq->bufs, &areq->cbuf, |
---|
| 1288 | &areq->pos); |
---|
| 1289 | |
---|
| 1290 | areq->cnt -= MIN(data_bs, areq->cnt); |
---|
| 1291 | if (areq->cnt == 0) |
---|
| 1292 | { |
---|
| 1293 | areq->breq->status = RTEMS_SUCCESSFUL; |
---|
| 1294 | } |
---|
| 1295 | else |
---|
| 1296 | { |
---|
| 1297 | /* |
---|
| 1298 | * this shouldn't happend on the initialization |
---|
| 1299 | * phase! |
---|
| 1300 | */ |
---|
| 1301 | rtems_fatal_error_occurred(RTEMS_INTERNAL_ERROR); |
---|
| 1302 | } |
---|
| 1303 | break; |
---|
| 1304 | |
---|
| 1305 | case ATA_COMMAND_TYPE_NON_DATA: |
---|
| 1306 | areq->breq->status = RTEMS_SUCCESSFUL; |
---|
| 1307 | areq->breq->error = val1; |
---|
| 1308 | break; |
---|
| 1309 | |
---|
| 1310 | default: |
---|
| 1311 | printf("ata_queue_task: non-supported command type\n"); |
---|
| 1312 | areq->breq->status = RTEMS_UNSATISFIED; |
---|
| 1313 | areq->breq->error = RTEMS_NOT_IMPLEMENTED; |
---|
| 1314 | break; |
---|
| 1315 | } |
---|
| 1316 | } |
---|