Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* -*- mode: c; c-basic-offset: 8 -*- */ |
| 2 | |
| 3 | /* NCR Dual 700 MCA SCSI Driver |
| 4 | * |
| 5 | * Copyright (C) 2001 by James.Bottomley@HansenPartnership.com |
| 6 | **----------------------------------------------------------------------------- |
| 7 | ** |
| 8 | ** This program is free software; you can redistribute it and/or modify |
| 9 | ** it under the terms of the GNU General Public License as published by |
| 10 | ** the Free Software Foundation; either version 2 of the License, or |
| 11 | ** (at your option) any later version. |
| 12 | ** |
| 13 | ** This program is distributed in the hope that it will be useful, |
| 14 | ** but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | ** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 16 | ** GNU General Public License for more details. |
| 17 | ** |
| 18 | ** You should have received a copy of the GNU General Public License |
| 19 | ** along with this program; if not, write to the Free Software |
| 20 | ** Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
| 21 | ** |
| 22 | **----------------------------------------------------------------------------- |
| 23 | */ |
| 24 | |
| 25 | /* Notes: |
| 26 | * |
| 27 | * Most of the work is done in the chip specific module, 53c700.o |
| 28 | * |
| 29 | * TODO List: |
| 30 | * |
| 31 | * 1. Extract the SCSI ID from the voyager CMOS table (necessary to |
| 32 | * support multi-host environments. |
| 33 | * |
| 34 | * */ |
| 35 | |
| 36 | |
| 37 | /* CHANGELOG |
| 38 | * |
| 39 | * Version 2.2 |
| 40 | * |
| 41 | * Added mca_set_adapter_name(). |
| 42 | * |
| 43 | * Version 2.1 |
| 44 | * |
| 45 | * Modularise the driver into a Board piece (this file) and a chip |
| 46 | * piece 53c700.[ch] and 53c700.scr, added module options. You can |
| 47 | * now specify the scsi id by the parameters |
| 48 | * |
| 49 | * NCR_D700=slot:<n> [siop:<n>] id:<n> .... |
| 50 | * |
| 51 | * They need to be comma separated if compiled into the kernel |
| 52 | * |
| 53 | * Version 2.0 |
| 54 | * |
| 55 | * Initial implementation of TCQ (Tag Command Queueing). TCQ is full |
| 56 | * featured and uses the clock algorithm to keep track of outstanding |
| 57 | * tags and guard against individual tag starvation. Also fixed a bug |
| 58 | * in all of the 1.x versions where the D700_data_residue() function |
| 59 | * was returning results off by 32 bytes (and thus causing the same 32 |
| 60 | * bytes to be written twice corrupting the data block). It turns out |
| 61 | * the 53c700 only has a 6 bit DBC and DFIFO registers not 7 bit ones |
| 62 | * like the 53c710 (The 710 is the only data manual still available, |
| 63 | * which I'd been using to program the 700). |
| 64 | * |
| 65 | * Version 1.2 |
| 66 | * |
| 67 | * Much improved message handling engine |
| 68 | * |
| 69 | * Version 1.1 |
| 70 | * |
| 71 | * Add code to handle selection reasonably correctly. By the time we |
| 72 | * get the selection interrupt, we've already responded, but drop off the |
| 73 | * bus and hope the selector will go away. |
| 74 | * |
| 75 | * Version 1.0: |
| 76 | * |
| 77 | * Initial release. Fully functional except for procfs and tag |
| 78 | * command queueing. Has only been tested on cards with 53c700-66 |
| 79 | * chips and only single ended. Features are |
| 80 | * |
| 81 | * 1. Synchronous data transfers to offset 8 (limit of 700-66) and |
| 82 | * 100ns (10MHz) limit of SCSI-2 |
| 83 | * |
| 84 | * 2. Disconnection and reselection |
| 85 | * |
| 86 | * Testing: |
| 87 | * |
| 88 | * I've only really tested this with the 700-66 chip, but have done |
| 89 | * soak tests in multi-device environments to verify that |
| 90 | * disconnections and reselections are being processed correctly. |
| 91 | * */ |
| 92 | |
| 93 | #define NCR_D700_VERSION "2.2" |
| 94 | |
| 95 | #include <linux/blkdev.h> |
| 96 | #include <linux/interrupt.h> |
| 97 | #include <linux/kernel.h> |
| 98 | #include <linux/module.h> |
| 99 | #include <linux/mca.h> |
| 100 | #include <linux/interrupt.h> |
| 101 | #include <asm/io.h> |
| 102 | #include <scsi/scsi_host.h> |
| 103 | #include <scsi/scsi_device.h> |
| 104 | #include <scsi/scsi_transport.h> |
| 105 | #include <scsi/scsi_transport_spi.h> |
| 106 | |
| 107 | #include "53c700.h" |
| 108 | #include "NCR_D700.h" |
| 109 | |
| 110 | static char *NCR_D700; /* command line from insmod */ |
| 111 | |
| 112 | MODULE_AUTHOR("James Bottomley"); |
| 113 | MODULE_DESCRIPTION("NCR Dual700 SCSI Driver"); |
| 114 | MODULE_LICENSE("GPL"); |
| 115 | module_param(NCR_D700, charp, 0); |
| 116 | |
James Bottomley | 3bb056e | 2006-07-12 11:55:39 -0400 | [diff] [blame] | 117 | static __u8 __devinitdata id_array[2*(MCA_MAX_SLOT_NR + 1)] = |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 118 | { [0 ... 2*(MCA_MAX_SLOT_NR + 1)-1] = 7 }; |
| 119 | |
| 120 | #ifdef MODULE |
| 121 | #define ARG_SEP ' ' |
| 122 | #else |
| 123 | #define ARG_SEP ',' |
| 124 | #endif |
| 125 | |
| 126 | static int __init |
| 127 | param_setup(char *string) |
| 128 | { |
| 129 | char *pos = string, *next; |
| 130 | int slot = -1, siop = -1; |
| 131 | |
| 132 | while(pos != NULL && (next = strchr(pos, ':')) != NULL) { |
| 133 | int val = (int)simple_strtoul(++next, NULL, 0); |
| 134 | |
| 135 | if(!strncmp(pos, "slot:", 5)) |
| 136 | slot = val; |
| 137 | else if(!strncmp(pos, "siop:", 5)) |
| 138 | siop = val; |
| 139 | else if(!strncmp(pos, "id:", 3)) { |
| 140 | if(slot == -1) { |
| 141 | printk(KERN_WARNING "NCR D700: Must specify slot for id parameter\n"); |
| 142 | } else if(slot > MCA_MAX_SLOT_NR) { |
| 143 | printk(KERN_WARNING "NCR D700: Illegal slot %d for id %d\n", slot, val); |
| 144 | } else { |
| 145 | if(siop != 0 && siop != 1) { |
| 146 | id_array[slot*2] = val; |
| 147 | id_array[slot*2 + 1] =val; |
| 148 | } else { |
| 149 | id_array[slot*2 + siop] = val; |
| 150 | } |
| 151 | } |
| 152 | } |
| 153 | if((pos = strchr(pos, ARG_SEP)) != NULL) |
| 154 | pos++; |
| 155 | } |
| 156 | return 1; |
| 157 | } |
| 158 | |
| 159 | /* Host template. The 53c700 routine NCR_700_detect will |
| 160 | * fill in all of the missing routines */ |
| 161 | static struct scsi_host_template NCR_D700_driver_template = { |
| 162 | .module = THIS_MODULE, |
| 163 | .name = "NCR Dual 700 MCA", |
| 164 | .proc_name = "NCR_D700", |
| 165 | .this_id = 7, |
| 166 | }; |
| 167 | |
| 168 | /* We needs this helper because we have two hosts per struct device */ |
| 169 | struct NCR_D700_private { |
| 170 | struct device *dev; |
| 171 | struct Scsi_Host *hosts[2]; |
| 172 | char name[30]; |
| 173 | char pad; |
| 174 | }; |
| 175 | |
James Bottomley | 3bb056e | 2006-07-12 11:55:39 -0400 | [diff] [blame] | 176 | static int __devinit |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 177 | NCR_D700_probe_one(struct NCR_D700_private *p, int siop, int irq, |
| 178 | int slot, u32 region, int differential) |
| 179 | { |
| 180 | struct NCR_700_Host_Parameters *hostdata; |
| 181 | struct Scsi_Host *host; |
| 182 | int ret; |
| 183 | |
Yoann Padioleau | dd00cc4 | 2007-07-19 01:49:03 -0700 | [diff] [blame] | 184 | hostdata = kzalloc(sizeof(*hostdata), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 185 | if (!hostdata) { |
| 186 | printk(KERN_ERR "NCR D700: SIOP%d: Failed to allocate host" |
| 187 | "data, detatching\n", siop); |
| 188 | return -ENOMEM; |
| 189 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 190 | |
| 191 | if (!request_region(region, 64, "NCR_D700")) { |
| 192 | printk(KERN_ERR "NCR D700: Failed to reserve IO region 0x%x\n", |
| 193 | region); |
| 194 | ret = -ENODEV; |
| 195 | goto region_failed; |
| 196 | } |
| 197 | |
| 198 | /* Fill in the three required pieces of hostdata */ |
| 56fece2 | 2005-04-03 03:57:48 -0600 | [diff] [blame] | 199 | hostdata->base = ioport_map(region, 64); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 200 | hostdata->differential = (((1<<siop) & differential) != 0); |
| 201 | hostdata->clock = NCR_D700_CLOCK_MHZ; |
Mark Haverkamp | a5364c5 | 2007-01-24 09:31:30 -0800 | [diff] [blame] | 202 | hostdata->burst_length = 8; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 203 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 204 | /* and register the siop */ |
| 205 | host = NCR_700_detect(&NCR_D700_driver_template, hostdata, p->dev); |
| 206 | if (!host) { |
| 207 | ret = -ENOMEM; |
| 208 | goto detect_failed; |
| 209 | } |
| 210 | |
| 211 | p->hosts[siop] = host; |
| 212 | /* FIXME: read this from SUS */ |
| 213 | host->this_id = id_array[slot * 2 + siop]; |
| 214 | host->irq = irq; |
| 56fece2 | 2005-04-03 03:57:48 -0600 | [diff] [blame] | 215 | host->base = region; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 216 | scsi_scan_host(host); |
| 217 | |
| 218 | return 0; |
| 219 | |
| 220 | detect_failed: |
Adrian Bunk | 8800727 | 2006-03-10 23:24:08 +0100 | [diff] [blame] | 221 | release_region(region, 64); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 222 | region_failed: |
| 223 | kfree(hostdata); |
| 224 | |
| 225 | return ret; |
| 226 | } |
| 227 | |
| 228 | static int |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 229 | NCR_D700_intr(int irq, void *data) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 230 | { |
| 231 | struct NCR_D700_private *p = (struct NCR_D700_private *)data; |
| 232 | int i, found = 0; |
| 233 | |
| 234 | for (i = 0; i < 2; i++) |
| 235 | if (p->hosts[i] && |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 236 | NCR_700_intr(irq, p->hosts[i]) == IRQ_HANDLED) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 237 | found++; |
| 238 | |
| 239 | return found ? IRQ_HANDLED : IRQ_NONE; |
| 240 | } |
| 241 | |
| 242 | /* Detect a D700 card. Note, because of the setup --- the chips are |
| 243 | * essentially connectecd to the MCA bus independently, it is easier |
| 244 | * to set them up as two separate host adapters, rather than one |
| 245 | * adapter with two channels */ |
James Bottomley | 3bb056e | 2006-07-12 11:55:39 -0400 | [diff] [blame] | 246 | static int __devinit |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 247 | NCR_D700_probe(struct device *dev) |
| 248 | { |
| 249 | struct NCR_D700_private *p; |
| 250 | int differential; |
| 251 | static int banner = 1; |
| 252 | struct mca_device *mca_dev = to_mca_device(dev); |
| 253 | int slot = mca_dev->slot; |
| 254 | int found = 0; |
| 255 | int irq, i; |
| 256 | int pos3j, pos3k, pos3a, pos3b, pos4; |
| 257 | __u32 base_addr, offset_addr; |
| 258 | |
| 259 | /* enable board interrupt */ |
| 260 | pos4 = mca_device_read_pos(mca_dev, 4); |
| 261 | pos4 |= 0x4; |
| 262 | mca_device_write_pos(mca_dev, 4, pos4); |
| 263 | |
| 264 | mca_device_write_pos(mca_dev, 6, 9); |
| 265 | pos3j = mca_device_read_pos(mca_dev, 3); |
| 266 | mca_device_write_pos(mca_dev, 6, 10); |
| 267 | pos3k = mca_device_read_pos(mca_dev, 3); |
| 268 | mca_device_write_pos(mca_dev, 6, 0); |
| 269 | pos3a = mca_device_read_pos(mca_dev, 3); |
| 270 | mca_device_write_pos(mca_dev, 6, 1); |
| 271 | pos3b = mca_device_read_pos(mca_dev, 3); |
| 272 | |
| 273 | base_addr = ((pos3j << 8) | pos3k) & 0xfffffff0; |
| 274 | offset_addr = ((pos3a << 8) | pos3b) & 0xffffff70; |
| 275 | |
| 276 | irq = (pos4 & 0x3) + 11; |
| 277 | if(irq >= 13) |
| 278 | irq++; |
| 279 | if(banner) { |
| 280 | printk(KERN_NOTICE "NCR D700: Driver Version " NCR_D700_VERSION "\n" |
| 281 | "NCR D700: Copyright (c) 2001 by James.Bottomley@HansenPartnership.com\n" |
| 282 | "NCR D700:\n"); |
| 283 | banner = 0; |
| 284 | } |
| 285 | /* now do the bus related transforms */ |
| 286 | irq = mca_device_transform_irq(mca_dev, irq); |
| 287 | base_addr = mca_device_transform_ioport(mca_dev, base_addr); |
| 288 | offset_addr = mca_device_transform_ioport(mca_dev, offset_addr); |
| 289 | |
| 290 | printk(KERN_NOTICE "NCR D700: found in slot %d irq = %d I/O base = 0x%x\n", slot, irq, offset_addr); |
| 291 | |
| 292 | /*outb(BOARD_RESET, base_addr);*/ |
| 293 | |
| 294 | /* clear any pending interrupts */ |
| 295 | (void)inb(base_addr + 0x08); |
| 296 | /* get modctl, used later for setting diff bits */ |
| 297 | switch(differential = (inb(base_addr + 0x08) >> 6)) { |
| 298 | case 0x00: |
| 299 | /* only SIOP1 differential */ |
| 300 | differential = 0x02; |
| 301 | break; |
| 302 | case 0x01: |
| 303 | /* Both SIOPs differential */ |
| 304 | differential = 0x03; |
| 305 | break; |
| 306 | case 0x03: |
| 307 | /* No SIOPs differential */ |
| 308 | differential = 0x00; |
| 309 | break; |
| 310 | default: |
| 311 | printk(KERN_ERR "D700: UNEXPECTED DIFFERENTIAL RESULT 0x%02x\n", |
| 312 | differential); |
| 313 | differential = 0x00; |
| 314 | break; |
| 315 | } |
| 316 | |
| 317 | p = kmalloc(sizeof(*p), GFP_KERNEL); |
| 318 | if (!p) |
| 319 | return -ENOMEM; |
| 320 | memset(p, '\0', sizeof(*p)); |
| 321 | p->dev = dev; |
| 322 | snprintf(p->name, sizeof(p->name), "D700(%s)", dev->bus_id); |
Thomas Gleixner | 1d6f359 | 2006-07-01 19:29:42 -0700 | [diff] [blame] | 323 | if (request_irq(irq, NCR_D700_intr, IRQF_SHARED, p->name, p)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 324 | printk(KERN_ERR "D700: request_irq failed\n"); |
| 325 | kfree(p); |
| 326 | return -EBUSY; |
| 327 | } |
| 328 | /* plumb in both 700 chips */ |
| 329 | for (i = 0; i < 2; i++) { |
| 330 | int err; |
| 331 | |
James Bottomley | 3bb056e | 2006-07-12 11:55:39 -0400 | [diff] [blame] | 332 | if ((err = NCR_D700_probe_one(p, i, irq, slot, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 333 | offset_addr + (0x80 * i), |
| 334 | differential)) != 0) |
| 335 | printk("D700: SIOP%d: probe failed, error = %d\n", |
| 336 | i, err); |
| 337 | else |
| 338 | found++; |
| 339 | } |
| 340 | |
| 341 | if (!found) { |
| 342 | kfree(p); |
| 343 | return -ENODEV; |
| 344 | } |
| 345 | |
| 346 | mca_device_set_claim(mca_dev, 1); |
| 347 | mca_device_set_name(mca_dev, "NCR_D700"); |
| 348 | dev_set_drvdata(dev, p); |
| 349 | return 0; |
| 350 | } |
| 351 | |
James Bottomley | 3bb056e | 2006-07-12 11:55:39 -0400 | [diff] [blame] | 352 | static void __devexit |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 353 | NCR_D700_remove_one(struct Scsi_Host *host) |
| 354 | { |
| 355 | scsi_remove_host(host); |
| 356 | NCR_700_release(host); |
| 357 | kfree((struct NCR_700_Host_Parameters *)host->hostdata[0]); |
| 358 | free_irq(host->irq, host); |
| 359 | release_region(host->base, 64); |
| 360 | } |
| 361 | |
James Bottomley | 3bb056e | 2006-07-12 11:55:39 -0400 | [diff] [blame] | 362 | static int __devexit |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 363 | NCR_D700_remove(struct device *dev) |
| 364 | { |
| 365 | struct NCR_D700_private *p = dev_get_drvdata(dev); |
| 366 | int i; |
| 367 | |
| 368 | for (i = 0; i < 2; i++) |
| 369 | NCR_D700_remove_one(p->hosts[i]); |
| 370 | |
| 371 | kfree(p); |
| 372 | return 0; |
| 373 | } |
| 374 | |
| 375 | static short NCR_D700_id_table[] = { NCR_D700_MCA_ID, 0 }; |
| 376 | |
| 377 | static struct mca_driver NCR_D700_driver = { |
| 378 | .id_table = NCR_D700_id_table, |
| 379 | .driver = { |
| 380 | .name = "NCR_D700", |
| 381 | .bus = &mca_bus_type, |
| 382 | .probe = NCR_D700_probe, |
James Bottomley | 3bb056e | 2006-07-12 11:55:39 -0400 | [diff] [blame] | 383 | .remove = __devexit_p(NCR_D700_remove), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 384 | }, |
| 385 | }; |
| 386 | |
| 387 | static int __init NCR_D700_init(void) |
| 388 | { |
| 389 | #ifdef MODULE |
| 390 | if (NCR_D700) |
| 391 | param_setup(NCR_D700); |
| 392 | #endif |
| 393 | |
| 394 | return mca_register_driver(&NCR_D700_driver); |
| 395 | } |
| 396 | |
| 397 | static void __exit NCR_D700_exit(void) |
| 398 | { |
| 399 | mca_unregister_driver(&NCR_D700_driver); |
| 400 | } |
| 401 | |
| 402 | module_init(NCR_D700_init); |
| 403 | module_exit(NCR_D700_exit); |
| 404 | |
| 405 | __setup("NCR_D700=", param_setup); |