src/add-ons/kernel/bus_managers/ide/channels.c

   1 /*
   2  * Copyright 2002/03, Thomas Kurschel. All rights reserved.
   3  * Distributed under the terms of the MIT License.
   4  */
   5
   6 /*
   7         Part of Open IDE bus manager
   8
   9         Manager of IDE controllers
  10
  11         Whenever a new IDE channel is reported, a new SIM is
  12         registered at the SCSI bus manager.
  13 */
  14
  15 #include "ide_internal.h"
  16 #include "ide_sim.h"
  17
  18 #include <string.h>
  19 #include <malloc.h>
  20
  21
  22 /** called when an IDE channel was registered by a controller driver */
  23
  24 static status_t
  25 ide_channel_added(device_node *parent)
  26 {
  27         const char *controller_name = NULL;
  28         uint32 channel_id;
  29
  30         SHOW_FLOW0(2, "");
  31
  32         if (pnp->get_attr_string(parent, IDE_CONTROLLER_CONTROLLER_NAME_ITEM,
  33                         &controller_name, true) != B_OK) {
  34                 dprintf("ide: ignored controller - controller name missing\n");
  35                 goto err;
  36         }
  37
  38         channel_id = pnp->create_id(IDE_CHANNEL_ID_GENERATOR);
  39
  40         if (channel_id < 0) {
  41                 SHOW_ERROR(0, "Cannot register IDE controller %s - out of IDs", controller_name);
  42                 goto err;
  43         }
  44
  45         {
  46                 device_attr attrs[] =
  47                 {
  48                         { B_DEVICE_FIXED_CHILD, B_STRING_TYPE, { string: SCSI_FOR_SIM_MODULE_NAME }},
  49
  50                         { SCSI_DESCRIPTION_CONTROLLER_NAME, B_STRING_TYPE,
  51                                 { string: controller_name }},
  52                         // maximum number of blocks per transmission:
  53                         // - ATAPI uses packets, i.e. normal SCSI limits apply
  54                         //   but I'm not sure about controller restrictions
  55                         // - ATA allows up to 256 blocks
  56                         // - some broken disk's firmware (read: IBM DTTA drives)
  57                         //   don't like 256 blocks in command queuing mode
  58                         // -> use 255 blocks as a least common nominator
  59                         //    (this is still 127.5K for HDs and 510K for CDs,
  60                         //     which should be sufficient)
  61                         // Note: to fix specific drive bugs, use ide_sim_get_restrictions()
  62                         // in ide_sim.c!
  63                         { B_DMA_MAX_TRANSFER_BLOCKS, B_UINT32_TYPE, { ui32: 255 }},
  64                         { IDE_CHANNEL_ID_ITEM, B_UINT32_TYPE, { ui32: channel_id }},
  65 //                      { PNP_MANAGER_ID_GENERATOR, B_STRING_TYPE, { string: IDE_CHANNEL_ID_GENERATOR }},
  66 //                      { PNP_MANAGER_AUTO_ID, B_UINT32_TYPE, { ui32: channel_id }},
  67
  68                         { NULL }
  69                 };
  70
  71                 return pnp->register_node(parent, IDE_SIM_MODULE_NAME, attrs, NULL,
  72                         NULL);
  73         }
  74
  75 err:
  76         return B_NO_MEMORY;
  77 }
  78
  79
  80 static status_t
  81 std_ops(int32 op, ...)
  82 {
  83         switch (op) {
  84                 case B_MODULE_INIT:
  85                 case B_MODULE_UNINIT:
  86                         return B_OK;
  87
  88                 default:
  89                         return B_ERROR;
  90         }
  91 }
  92
  93
  94 ide_for_controller_interface ide_for_controller_module = {
  95         {
  96                 {
  97                         IDE_FOR_CONTROLLER_MODULE_NAME,
  98                         0,
  99                         &std_ops
 100                 },
 101
 102                 NULL,   // supported devices
 103                 ide_channel_added,
 104                 NULL,
 105                 NULL,
 106                 NULL
 107         },
 108
 109         ide_irq_handler
 110 };