drivers/block/smart1,2.h

   1 /*
   2  *    Disk Array driver for Compaq SMART2 Controllers
   3  *    Copyright 1998 Compaq Computer Corporation
   4  *
   5  *    This program is free software; you can redistribute it and/or modify
   6  *    it under the terms of the GNU General Public License as published by
   7  *    the Free Software Foundation; either version 2 of the License, or
   8  *    (at your option) any later version.
   9  *
  10  *    This program is distributed in the hope that it will be useful,
  11  *    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  *    MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
  13  *    NON INFRINGEMENT.  See the GNU General Public License for more details.
  14  *
  15  *    You should have received a copy of the GNU General Public License
  16  *    along with this program; if not, write to the Free Software
  17  *    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  18  *
  19  *    Questions/Comments/Bugfixes to iss_storagedev@hp.com
  20  *
  21  *    If you want to make changes, improve or add functionality to this
  22  *    driver, you'll probably need the Compaq Array Controller Interface
  23  *    Specificiation (Document number ECG086/1198)
  24  */
  25
  26 /*
  27  * This file contains the controller communication implementation for
  28  * Compaq SMART-1 and SMART-2 controllers.  To the best of my knowledge,
  29  * this should support:
  30  *
  31  *  PCI:
  32  *  SMART-2/P, SMART-2DH, SMART-2SL, SMART-221, SMART-3100ES, SMART-3200
  33  *  Integerated SMART Array Controller, SMART-4200, SMART-4250ES
  34  *
  35  *  EISA:
  36  *  SMART-2/E, SMART, IAES, IDA-2, IDA
  37  */
  38
  39 /*
  40  * Memory mapped FIFO interface (SMART 42xx cards)
  41  */
  42 static void smart4_submit_command(ctlr_info_t *h, cmdlist_t *c)
  43 {
  44         writel(c->busaddr, h->vaddr + S42XX_REQUEST_PORT_OFFSET);
  45 }
  46
  47 /*
  48  *  This card is the opposite of the other cards.
  49  *   0 turns interrupts on...
  50  *   0x08 turns them off...
  51  */
  52 static void smart4_intr_mask(ctlr_info_t *h, unsigned long val)
  53 {
  54         if (val)
  55         { /* Turn interrupts on */
  56                 writel(0, h->vaddr + S42XX_REPLY_INTR_MASK_OFFSET);
  57         } else /* Turn them off */
  58         {
  59                 writel( S42XX_INTR_OFF,
  60                         h->vaddr + S42XX_REPLY_INTR_MASK_OFFSET);
  61         }
  62 }
  63
  64 /*
  65  *  For older cards FIFO Full = 0.
  66  *  On this card 0 means there is room, anything else FIFO Full.
  67  *
  68  */
  69 static unsigned long smart4_fifo_full(ctlr_info_t *h)
  70 {
  71
  72         return (!readl(h->vaddr + S42XX_REQUEST_PORT_OFFSET));
  73 }
  74
  75 /* This type of controller returns -1 if the fifo is empty,
  76  *    Not 0 like the others.
  77  *    And we need to let it know we read a value out
  78  */
  79 static unsigned long smart4_completed(ctlr_info_t *h)
  80 {
  81         long register_value
  82                 = readl(h->vaddr + S42XX_REPLY_PORT_OFFSET);
  83
  84         /* Fifo is empty */
  85         if( register_value == 0xffffffff)
  86                 return 0;
  87
  88         /* Need to let it know we got the reply */
  89         /* We do this by writing a 0 to the port we just read from */
  90         writel(0, h->vaddr + S42XX_REPLY_PORT_OFFSET);
  91
  92         return ((unsigned long) register_value);
  93 }
  94
  95  /*
  96  *  This hardware returns interrupt pending at a different place and
  97  *  it does not tell us if the fifo is empty, we will have check
  98  *  that by getting a 0 back from the comamnd_completed call.
  99  */
 100 static unsigned long smart4_intr_pending(ctlr_info_t *h)
 101 {
 102         unsigned long register_value  =
 103                 readl(h->vaddr + S42XX_INTR_STATUS);
 104
 105         if( register_value &  S42XX_INTR_PENDING)
 106                 return  FIFO_NOT_EMPTY;
 107         return 0 ;
 108 }
 109
 110 static struct access_method smart4_access = {
 111         smart4_submit_command,
 112         smart4_intr_mask,
 113         smart4_fifo_full,
 114         smart4_intr_pending,
 115         smart4_completed,
 116 };
 117
 118 /*
 119  * Memory mapped FIFO interface (PCI SMART2 and SMART 3xxx cards)
 120  */
 121 static void smart2_submit_command(ctlr_info_t *h, cmdlist_t *c)
 122 {
 123         writel(c->busaddr, h->vaddr + COMMAND_FIFO);
 124 }
 125
 126 static void smart2_intr_mask(ctlr_info_t *h, unsigned long val)
 127 {
 128         writel(val, h->vaddr + INTR_MASK);
 129 }
 130
 131 static unsigned long smart2_fifo_full(ctlr_info_t *h)
 132 {
 133         return readl(h->vaddr + COMMAND_FIFO);
 134 }
 135
 136 static unsigned long smart2_completed(ctlr_info_t *h)
 137 {
 138         return readl(h->vaddr + COMMAND_COMPLETE_FIFO);
 139 }
 140
 141 static unsigned long smart2_intr_pending(ctlr_info_t *h)
 142 {
 143         return readl(h->vaddr + INTR_PENDING);
 144 }
 145
 146 static struct access_method smart2_access = {
 147         smart2_submit_command,
 148         smart2_intr_mask,
 149         smart2_fifo_full,
 150         smart2_intr_pending,
 151         smart2_completed,
 152 };
 153
 154 /*
 155  *  IO access for SMART-2/E cards
 156  */
 157 static void smart2e_submit_command(ctlr_info_t *h, cmdlist_t *c)
 158 {
 159         outl(c->busaddr, h->io_mem_addr + COMMAND_FIFO);
 160 }
 161
 162 static void smart2e_intr_mask(ctlr_info_t *h, unsigned long val)
 163 {
 164         outl(val, h->io_mem_addr + INTR_MASK);
 165 }
 166
 167 static unsigned long smart2e_fifo_full(ctlr_info_t *h)
 168 {
 169         return inl(h->io_mem_addr + COMMAND_FIFO);
 170 }
 171
 172 static unsigned long smart2e_completed(ctlr_info_t *h)
 173 {
 174         return inl(h->io_mem_addr + COMMAND_COMPLETE_FIFO);
 175 }
 176
 177 static unsigned long smart2e_intr_pending(ctlr_info_t *h)
 178 {
 179         return inl(h->io_mem_addr + INTR_PENDING);
 180 }
 181
 182 static struct access_method smart2e_access = {
 183         smart2e_submit_command,
 184         smart2e_intr_mask,
 185         smart2e_fifo_full,
 186         smart2e_intr_pending,
 187         smart2e_completed,
 188 };
 189
 190 /*
 191  *  IO access for older SMART-1 type cards
 192  */
 193 #define SMART1_SYSTEM_MASK              0xC8E
 194 #define SMART1_SYSTEM_DOORBELL          0xC8F
 195 #define SMART1_LOCAL_MASK               0xC8C
 196 #define SMART1_LOCAL_DOORBELL           0xC8D
 197 #define SMART1_INTR_MASK                0xC89
 198 #define SMART1_LISTADDR                 0xC90
 199 #define SMART1_LISTLEN                  0xC94
 200 #define SMART1_TAG                      0xC97
 201 #define SMART1_COMPLETE_ADDR            0xC98
 202 #define SMART1_LISTSTATUS               0xC9E
 203
 204 #define CHANNEL_BUSY                    0x01
 205 #define CHANNEL_CLEAR                   0x02
 206
 207 static void smart1_submit_command(ctlr_info_t *h, cmdlist_t *c)
 208 {
 209         /*
 210          * This __u16 is actually a bunch of control flags on SMART
 211          * and below.  We want them all to be zero.
 212          */
 213         c->hdr.size = 0;
 214
 215         outb(CHANNEL_CLEAR, h->io_mem_addr + SMART1_SYSTEM_DOORBELL);
 216
 217         outl(c->busaddr, h->io_mem_addr + SMART1_LISTADDR);
 218         outw(c->size, h->io_mem_addr + SMART1_LISTLEN);
 219
 220         outb(CHANNEL_BUSY, h->io_mem_addr + SMART1_LOCAL_DOORBELL);
 221 }
 222
 223 static void smart1_intr_mask(ctlr_info_t *h, unsigned long val)
 224 {
 225         if (val == 1) {
 226                 outb(0xFD, h->io_mem_addr + SMART1_SYSTEM_DOORBELL);
 227                 outb(CHANNEL_BUSY, h->io_mem_addr + SMART1_LOCAL_DOORBELL);
 228                 outb(0x01, h->io_mem_addr + SMART1_INTR_MASK);
 229                 outb(0x01, h->io_mem_addr + SMART1_SYSTEM_MASK);
 230         } else {
 231                 outb(0, h->io_mem_addr + 0xC8E);
 232         }
 233 }
 234
 235 static unsigned long smart1_fifo_full(ctlr_info_t *h)
 236 {
 237         unsigned char chan;
 238         chan = inb(h->io_mem_addr + SMART1_SYSTEM_DOORBELL) & CHANNEL_CLEAR;
 239         return chan;
 240 }
 241
 242 static unsigned long smart1_completed(ctlr_info_t *h)
 243 {
 244         unsigned char status;
 245         unsigned long cmd;
 246
 247         if (inb(h->io_mem_addr + SMART1_SYSTEM_DOORBELL) & CHANNEL_BUSY) {
 248                 outb(CHANNEL_BUSY, h->io_mem_addr + SMART1_SYSTEM_DOORBELL);
 249
 250                 cmd = inl(h->io_mem_addr + SMART1_COMPLETE_ADDR);
 251                 status = inb(h->io_mem_addr + SMART1_LISTSTATUS);
 252
 253                 outb(CHANNEL_CLEAR, h->io_mem_addr + SMART1_LOCAL_DOORBELL);
 254
 255                 /*
 256                  * this is x86 (actually compaq x86) only, so it's ok
 257                  */
 258                 if (cmd) ((cmdlist_t*)bus_to_virt(cmd))->req.hdr.rcode = status;
 259         } else {
 260                 cmd = 0;
 261         }
 262         return cmd;
 263 }
 264
 265 static unsigned long smart1_intr_pending(ctlr_info_t *h)
 266 {
 267         unsigned char chan;
 268         chan = inb(h->io_mem_addr + SMART1_SYSTEM_DOORBELL) & CHANNEL_BUSY;
 269         return chan;
 270 }
 271
 272 static struct access_method smart1_access = {
 273         smart1_submit_command,
 274         smart1_intr_mask,
 275         smart1_fifo_full,
 276         smart1_intr_pending,
 277         smart1_completed,
 278 };