[SCSI] qla2xxx: Validate mid-layer 'underflow' during check-condition handling.
[linux-2.6] / drivers / scsi / aic7xxx / aic7770.c
1 /*
2  * Product specific probe and attach routines for:
3  *      27/284X and aic7770 motherboard SCSI controllers
4  *
5  * Copyright (c) 1994-1998, 2000, 2001 Justin T. Gibbs.
6  * All rights reserved.
7  *
8  * Redistribution and use in source and binary forms, with or without
9  * modification, are permitted provided that the following conditions
10  * are met:
11  * 1. Redistributions of source code must retain the above copyright
12  *    notice, this list of conditions, and the following disclaimer,
13  *    without modification.
14  * 2. Redistributions in binary form must reproduce at minimum a disclaimer
15  *    substantially similar to the "NO WARRANTY" disclaimer below
16  *    ("Disclaimer") and any redistribution must be conditioned upon
17  *    including a substantially similar Disclaimer requirement for further
18  *    binary redistribution.
19  * 3. Neither the names of the above-listed copyright holders nor the names
20  *    of any contributors may be used to endorse or promote products derived
21  *    from this software without specific prior written permission.
22  *
23  * Alternatively, this software may be distributed under the terms of the
24  * GNU General Public License ("GPL") version 2 as published by the Free
25  * Software Foundation.
26  *
27  * NO WARRANTY
28  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
29  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
30  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
31  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
32  * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
33  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
34  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
35  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
36  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
37  * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
38  * POSSIBILITY OF SUCH DAMAGES.
39  *
40  * $Id: //depot/aic7xxx/aic7xxx/aic7770.c#32 $
41  *
42  * $FreeBSD$
43  */
44
45 #ifdef __linux__
46 #include "aic7xxx_osm.h"
47 #include "aic7xxx_inline.h"
48 #include "aic7xxx_93cx6.h"
49 #else
50 #include <dev/aic7xxx/aic7xxx_osm.h>
51 #include <dev/aic7xxx/aic7xxx_inline.h>
52 #include <dev/aic7xxx/aic7xxx_93cx6.h>
53 #endif
54
55 #define ID_AIC7770      0x04907770
56 #define ID_AHA_274x     0x04907771
57 #define ID_AHA_284xB    0x04907756 /* BIOS enabled */
58 #define ID_AHA_284x     0x04907757 /* BIOS disabled*/
59 #define ID_OLV_274x     0x04907782 /* Olivetti OEM */
60 #define ID_OLV_274xD    0x04907783 /* Olivetti OEM (Differential) */
61
62 static int aic7770_chip_init(struct ahc_softc *ahc);
63 static int aic7770_suspend(struct ahc_softc *ahc);
64 static int aic7770_resume(struct ahc_softc *ahc);
65 static int aha2840_load_seeprom(struct ahc_softc *ahc);
66 static ahc_device_setup_t ahc_aic7770_VL_setup;
67 static ahc_device_setup_t ahc_aic7770_EISA_setup;
68 static ahc_device_setup_t ahc_aic7770_setup;
69
70 struct aic7770_identity aic7770_ident_table[] =
71 {
72         {
73                 ID_AHA_274x,
74                 0xFFFFFFFF,
75                 "Adaptec 274X SCSI adapter",
76                 ahc_aic7770_EISA_setup
77         },
78         {
79                 ID_AHA_284xB,
80                 0xFFFFFFFE,
81                 "Adaptec 284X SCSI adapter",
82                 ahc_aic7770_VL_setup
83         },
84         {
85                 ID_AHA_284x,
86                 0xFFFFFFFE,
87                 "Adaptec 284X SCSI adapter (BIOS Disabled)",
88                 ahc_aic7770_VL_setup
89         },
90         {
91                 ID_OLV_274x,
92                 0xFFFFFFFF,
93                 "Adaptec (Olivetti OEM) 274X SCSI adapter",
94                 ahc_aic7770_EISA_setup
95         },
96         {
97                 ID_OLV_274xD,
98                 0xFFFFFFFF,
99                 "Adaptec (Olivetti OEM) 274X Differential SCSI adapter",
100                 ahc_aic7770_EISA_setup
101         },
102         /* Generic chip probes for devices we don't know 'exactly' */
103         {
104                 ID_AIC7770,
105                 0xFFFFFFFF,
106                 "Adaptec aic7770 SCSI adapter",
107                 ahc_aic7770_EISA_setup
108         }
109 };
110 const int ahc_num_aic7770_devs = ARRAY_SIZE(aic7770_ident_table);
111
112 struct aic7770_identity *
113 aic7770_find_device(uint32_t id)
114 {
115         struct  aic7770_identity *entry;
116         int     i;
117
118         for (i = 0; i < ahc_num_aic7770_devs; i++) {
119                 entry = &aic7770_ident_table[i];
120                 if (entry->full_id == (id & entry->id_mask))
121                         return (entry);
122         }
123         return (NULL);
124 }
125
126 int
127 aic7770_config(struct ahc_softc *ahc, struct aic7770_identity *entry, u_int io)
128 {
129         int     error;
130         int     have_seeprom;
131         u_int   hostconf;
132         u_int   irq;
133         u_int   intdef;
134
135         error = entry->setup(ahc);
136         have_seeprom = 0;
137         if (error != 0)
138                 return (error);
139
140         error = aic7770_map_registers(ahc, io);
141         if (error != 0)
142                 return (error);
143
144         /*
145          * Before we continue probing the card, ensure that
146          * its interrupts are *disabled*.  We don't want
147          * a misstep to hang the machine in an interrupt
148          * storm.
149          */
150         ahc_intr_enable(ahc, FALSE);
151
152         ahc->description = entry->name;
153         error = ahc_softc_init(ahc);
154         if (error != 0)
155                 return (error);
156
157         ahc->bus_chip_init = aic7770_chip_init;
158         ahc->bus_suspend = aic7770_suspend;
159         ahc->bus_resume = aic7770_resume;
160
161         error = ahc_reset(ahc, /*reinit*/FALSE);
162         if (error != 0)
163                 return (error);
164
165         /* Make sure we have a valid interrupt vector */
166         intdef = ahc_inb(ahc, INTDEF);
167         irq = intdef & VECTOR;
168         switch (irq) {
169         case 9:
170         case 10:
171         case 11:
172         case 12:
173         case 14:
174         case 15:
175                 break;
176         default:
177                 printf("aic7770_config: invalid irq setting %d\n", intdef);
178                 return (ENXIO);
179         }
180
181         if ((intdef & EDGE_TRIG) != 0)
182                 ahc->flags |= AHC_EDGE_INTERRUPT;
183
184         switch (ahc->chip & (AHC_EISA|AHC_VL)) {
185         case AHC_EISA:
186         {
187                 u_int biosctrl;
188                 u_int scsiconf;
189                 u_int scsiconf1;
190
191                 biosctrl = ahc_inb(ahc, HA_274_BIOSCTRL);
192                 scsiconf = ahc_inb(ahc, SCSICONF);
193                 scsiconf1 = ahc_inb(ahc, SCSICONF + 1);
194
195                 /* Get the primary channel information */
196                 if ((biosctrl & CHANNEL_B_PRIMARY) != 0)
197                         ahc->flags |= 1;
198
199                 if ((biosctrl & BIOSMODE) == BIOSDISABLED) {
200                         ahc->flags |= AHC_USEDEFAULTS;
201                 } else {
202                         if ((ahc->features & AHC_WIDE) != 0) {
203                                 ahc->our_id = scsiconf1 & HWSCSIID;
204                                 if (scsiconf & TERM_ENB)
205                                         ahc->flags |= AHC_TERM_ENB_A;
206                         } else {
207                                 ahc->our_id = scsiconf & HSCSIID;
208                                 ahc->our_id_b = scsiconf1 & HSCSIID;
209                                 if (scsiconf & TERM_ENB)
210                                         ahc->flags |= AHC_TERM_ENB_A;
211                                 if (scsiconf1 & TERM_ENB)
212                                         ahc->flags |= AHC_TERM_ENB_B;
213                         }
214                 }
215                 if ((ahc_inb(ahc, HA_274_BIOSGLOBAL) & HA_274_EXTENDED_TRANS))
216                         ahc->flags |= AHC_EXTENDED_TRANS_A|AHC_EXTENDED_TRANS_B;
217                 break;
218         }
219         case AHC_VL:
220         {
221                 have_seeprom = aha2840_load_seeprom(ahc);
222                 break;
223         }
224         default:
225                 break;
226         }
227         if (have_seeprom == 0) {
228                 free(ahc->seep_config, M_DEVBUF);
229                 ahc->seep_config = NULL;
230         }
231
232         /*
233          * Ensure autoflush is enabled
234          */
235         ahc_outb(ahc, SBLKCTL, ahc_inb(ahc, SBLKCTL) & ~AUTOFLUSHDIS);
236
237         /* Setup the FIFO threshold and the bus off time */
238         hostconf = ahc_inb(ahc, HOSTCONF);
239         ahc_outb(ahc, BUSSPD, hostconf & DFTHRSH);
240         ahc_outb(ahc, BUSTIME, (hostconf << 2) & BOFF);
241
242         ahc->bus_softc.aic7770_softc.busspd = hostconf & DFTHRSH;
243         ahc->bus_softc.aic7770_softc.bustime = (hostconf << 2) & BOFF;
244
245         /*
246          * Generic aic7xxx initialization.
247          */
248         error = ahc_init(ahc);
249         if (error != 0)
250                 return (error);
251
252         error = aic7770_map_int(ahc, irq);
253         if (error != 0)
254                 return (error);
255
256         ahc->init_level++;
257
258         /*
259          * Enable the board's BUS drivers
260          */
261         ahc_outb(ahc, BCTL, ENABLE);
262         return (0);
263 }
264
265 static int
266 aic7770_chip_init(struct ahc_softc *ahc)
267 {
268         ahc_outb(ahc, BUSSPD, ahc->bus_softc.aic7770_softc.busspd);
269         ahc_outb(ahc, BUSTIME, ahc->bus_softc.aic7770_softc.bustime);
270         ahc_outb(ahc, SBLKCTL, ahc_inb(ahc, SBLKCTL) & ~AUTOFLUSHDIS);
271         ahc_outb(ahc, BCTL, ENABLE);
272         return (ahc_chip_init(ahc));
273 }
274
275 static int
276 aic7770_suspend(struct ahc_softc *ahc)
277 {
278         return (ahc_suspend(ahc));
279 }
280
281 static int
282 aic7770_resume(struct ahc_softc *ahc)
283 {
284         return (ahc_resume(ahc));
285 }
286
287 /*
288  * Read the 284x SEEPROM.
289  */
290 static int
291 aha2840_load_seeprom(struct ahc_softc *ahc)
292 {
293         struct  seeprom_descriptor sd;
294         struct  seeprom_config *sc;
295         int     have_seeprom;
296         uint8_t scsi_conf;
297
298         sd.sd_ahc = ahc;
299         sd.sd_control_offset = SEECTL_2840;
300         sd.sd_status_offset = STATUS_2840;
301         sd.sd_dataout_offset = STATUS_2840;             
302         sd.sd_chip = C46;
303         sd.sd_MS = 0;
304         sd.sd_RDY = EEPROM_TF;
305         sd.sd_CS = CS_2840;
306         sd.sd_CK = CK_2840;
307         sd.sd_DO = DO_2840;
308         sd.sd_DI = DI_2840;
309         sc = ahc->seep_config;
310
311         if (bootverbose)
312                 printf("%s: Reading SEEPROM...", ahc_name(ahc));
313         have_seeprom = ahc_read_seeprom(&sd, (uint16_t *)sc,
314                                         /*start_addr*/0, sizeof(*sc)/2);
315
316         if (have_seeprom) {
317
318                 if (ahc_verify_cksum(sc) == 0) {
319                         if(bootverbose)
320                                 printf ("checksum error\n");
321                         have_seeprom = 0;
322                 } else if (bootverbose) {
323                         printf("done.\n");
324                 }
325         }
326
327         if (!have_seeprom) {
328                 if (bootverbose)
329                         printf("%s: No SEEPROM available\n", ahc_name(ahc));
330                 ahc->flags |= AHC_USEDEFAULTS;
331         } else {
332                 /*
333                  * Put the data we've collected down into SRAM
334                  * where ahc_init will find it.
335                  */
336                 int      i;
337                 int      max_targ;
338                 uint16_t discenable;
339
340                 max_targ = (ahc->features & AHC_WIDE) != 0 ? 16 : 8;
341                 discenable = 0;
342                 for (i = 0; i < max_targ; i++){
343                         uint8_t target_settings;
344
345                         target_settings = (sc->device_flags[i] & CFXFER) << 4;
346                         if (sc->device_flags[i] & CFSYNCH)
347                                 target_settings |= SOFS;
348                         if (sc->device_flags[i] & CFWIDEB)
349                                 target_settings |= WIDEXFER;
350                         if (sc->device_flags[i] & CFDISC)
351                                 discenable |= (0x01 << i);
352                         ahc_outb(ahc, TARG_SCSIRATE + i, target_settings);
353                 }
354                 ahc_outb(ahc, DISC_DSB, ~(discenable & 0xff));
355                 ahc_outb(ahc, DISC_DSB + 1, ~((discenable >> 8) & 0xff));
356
357                 ahc->our_id = sc->brtime_id & CFSCSIID;
358
359                 scsi_conf = (ahc->our_id & 0x7);
360                 if (sc->adapter_control & CFSPARITY)
361                         scsi_conf |= ENSPCHK;
362                 if (sc->adapter_control & CFRESETB)
363                         scsi_conf |= RESET_SCSI;
364
365                 if (sc->bios_control & CF284XEXTEND)            
366                         ahc->flags |= AHC_EXTENDED_TRANS_A;
367                 /* Set SCSICONF info */
368                 ahc_outb(ahc, SCSICONF, scsi_conf);
369
370                 if (sc->adapter_control & CF284XSTERM)
371                         ahc->flags |= AHC_TERM_ENB_A;
372         }
373         return (have_seeprom);
374 }
375
376 static int
377 ahc_aic7770_VL_setup(struct ahc_softc *ahc)
378 {
379         int error;
380
381         error = ahc_aic7770_setup(ahc);
382         ahc->chip |= AHC_VL;
383         return (error);
384 }
385
386 static int
387 ahc_aic7770_EISA_setup(struct ahc_softc *ahc)
388 {
389         int error;
390
391         error = ahc_aic7770_setup(ahc);
392         ahc->chip |= AHC_EISA;
393         return (error);
394 }
395
396 static int
397 ahc_aic7770_setup(struct ahc_softc *ahc)
398 {
399         ahc->channel = 'A';
400         ahc->channel_b = 'B';
401         ahc->chip = AHC_AIC7770;
402         ahc->features = AHC_AIC7770_FE;
403         ahc->bugs |= AHC_TMODE_WIDEODD_BUG;
404         ahc->flags |= AHC_PAGESCBS;
405         ahc->instruction_ram_size = 448;
406         return (0);
407 }