File: /usr/src/linux/drivers/scsi/sr_vendor.c
1 /* -*-linux-c-*-
2
3 * vendor-specific code for SCSI CD-ROM's goes here.
4 *
5 * This is needed becauce most of the new features (multisession and
6 * the like) are too new to be included into the SCSI-II standard (to
7 * be exact: there is'nt anything in my draft copy).
8 *
9 * Aug 1997: Ha! Got a SCSI-3 cdrom spec across my fingers. SCSI-3 does
10 * multisession using the READ TOC command (like SONY).
11 *
12 * Rearranged stuff here: SCSI-3 is included allways, support
13 * for NEC/TOSHIBA/HP commands is optional.
14 *
15 * Gerd Knorr <kraxel@cs.tu-berlin.de>
16 *
17 * --------------------------------------------------------------------------
18 *
19 * support for XA/multisession-CD's
20 *
21 * - NEC: Detection and support of multisession CD's.
22 *
23 * - TOSHIBA: Detection and support of multisession CD's.
24 * Some XA-Sector tweaking, required for older drives.
25 *
26 * - SONY: Detection and support of multisession CD's.
27 * added by Thomas Quinot <thomas@cuivre.freenix.fr>
28 *
29 * - PIONEER, HITACHI, PLEXTOR, MATSHITA, TEAC, PHILIPS: known to
30 * work with SONY (SCSI3 now) code.
31 *
32 * - HP: Much like SONY, but a little different... (Thomas)
33 * HP-Writers only ??? Maybe other CD-Writers work with this too ?
34 * HP 6020 writers now supported.
35 */
36
37 #include <linux/config.h>
38 #include <linux/errno.h>
39 #include <linux/string.h>
40
41 #include <linux/blk.h>
42 #include "scsi.h"
43 #include "hosts.h"
44 #include <scsi/scsi_ioctl.h>
45
46 #include <linux/cdrom.h>
47 #include "sr.h"
48
49 #if 0
50 #define DEBUG
51 #endif
52
53 /* here are some constants to sort the vendors into groups */
54
55 #define VENDOR_SCSI3 1 /* default: scsi-3 mmc */
56
57 #define VENDOR_NEC 2
58 #define VENDOR_TOSHIBA 3
59 #define VENDOR_WRITER 4 /* pre-scsi3 writers */
60
61 #define VENDOR_ID (scsi_CDs[minor].vendor)
62
63 void sr_vendor_init(int minor)
64 {
65 #ifndef CONFIG_BLK_DEV_SR_VENDOR
66 VENDOR_ID = VENDOR_SCSI3;
67 #else
68 char *vendor = scsi_CDs[minor].device->vendor;
69 char *model = scsi_CDs[minor].device->model;
70
71 /* default */
72 VENDOR_ID = VENDOR_SCSI3;
73 if (scsi_CDs[minor].readcd_known)
74 /* this is true for scsi3/mmc drives - no more checks */
75 return;
76
77 if (scsi_CDs[minor].device->type == TYPE_WORM) {
78 VENDOR_ID = VENDOR_WRITER;
79
80 } else if (!strncmp(vendor, "NEC", 3)) {
81 VENDOR_ID = VENDOR_NEC;
82 if (!strncmp(model, "CD-ROM DRIVE:25", 15) ||
83 !strncmp(model, "CD-ROM DRIVE:36", 15) ||
84 !strncmp(model, "CD-ROM DRIVE:83", 15) ||
85 !strncmp(model, "CD-ROM DRIVE:84 ", 16)
86 #if 0
87 /* my NEC 3x returns the read-raw data if a read-raw
88 is followed by a read for the same sector - aeb */
89 || !strncmp(model, "CD-ROM DRIVE:500", 16)
90 #endif
91 )
92 /* these can't handle multisession, may hang */
93 scsi_CDs[minor].cdi.mask |= CDC_MULTI_SESSION;
94
95 } else if (!strncmp(vendor, "TOSHIBA", 7)) {
96 VENDOR_ID = VENDOR_TOSHIBA;
97
98 }
99 #endif
100 }
101
102
103 /* small handy function for switching block length using MODE SELECT,
104 * used by sr_read_sector() */
105
106 int sr_set_blocklength(int minor, int blocklength)
107 {
108 unsigned char *buffer; /* the buffer for the ioctl */
109 unsigned char cmd[MAX_COMMAND_SIZE]; /* the scsi-command */
110 struct ccs_modesel_head *modesel;
111 int rc, density = 0;
112
113 #ifdef CONFIG_BLK_DEV_SR_VENDOR
114 if (VENDOR_ID == VENDOR_TOSHIBA)
115 density = (blocklength > 2048) ? 0x81 : 0x83;
116 #endif
117
118 buffer = (unsigned char *) scsi_malloc(512);
119 if (!buffer)
120 return -ENOMEM;
121
122 #ifdef DEBUG
123 printk("sr%d: MODE SELECT 0x%x/%d\n", minor, density, blocklength);
124 #endif
125 memset(cmd, 0, MAX_COMMAND_SIZE);
126 cmd[0] = MODE_SELECT;
127 cmd[1] = (scsi_CDs[minor].device->scsi_level <= SCSI_2) ?
128 (scsi_CDs[minor].device->lun << 5) : 0;
129 cmd[1] |= (1 << 4);
130 cmd[4] = 12;
131 modesel = (struct ccs_modesel_head *) buffer;
132 memset(modesel, 0, sizeof(*modesel));
133 modesel->block_desc_length = 0x08;
134 modesel->density = density;
135 modesel->block_length_med = (blocklength >> 8) & 0xff;
136 modesel->block_length_lo = blocklength & 0xff;
137 if (0 == (rc = sr_do_ioctl(minor, cmd, buffer, sizeof(*modesel), 0, SCSI_DATA_WRITE, NULL))) {
138 scsi_CDs[minor].device->sector_size = blocklength;
139 }
140 #ifdef DEBUG
141 else
142 printk("sr%d: switching blocklength to %d bytes failed\n",
143 minor, blocklength);
144 #endif
145 scsi_free(buffer, 512);
146 return rc;
147 }
148
149 /* This function gets called after a media change. Checks if the CD is
150 multisession, asks for offset etc. */
151
152 #define BCD_TO_BIN(x) ((((int)x & 0xf0) >> 4)*10 + ((int)x & 0x0f))
153
154 int sr_cd_check(struct cdrom_device_info *cdi)
155 {
156 unsigned long sector;
157 unsigned char *buffer; /* the buffer for the ioctl */
158 unsigned char cmd[MAX_COMMAND_SIZE]; /* the scsi-command */
159 int rc, no_multi, minor;
160
161 minor = MINOR(cdi->dev);
162 if (scsi_CDs[minor].cdi.mask & CDC_MULTI_SESSION)
163 return 0;
164
165 buffer = (unsigned char *) scsi_malloc(512);
166 if (!buffer)
167 return -ENOMEM;
168
169 sector = 0; /* the multisession sector offset goes here */
170 no_multi = 0; /* flag: the drive can't handle multisession */
171 rc = 0;
172
173 switch (VENDOR_ID) {
174
175 case VENDOR_SCSI3:
176 memset(cmd, 0, MAX_COMMAND_SIZE);
177 cmd[0] = READ_TOC;
178 cmd[1] = (scsi_CDs[minor].device->scsi_level <= SCSI_2) ?
179 (scsi_CDs[minor].device->lun << 5) : 0;
180 cmd[8] = 12;
181 cmd[9] = 0x40;
182 rc = sr_do_ioctl(minor, cmd, buffer, 12, 1, SCSI_DATA_READ, NULL);
183 if (rc != 0)
184 break;
185 if ((buffer[0] << 8) + buffer[1] < 0x0a) {
186 printk(KERN_INFO "sr%d: Hmm, seems the drive "
187 "doesn't support multisession CD's\n", minor);
188 no_multi = 1;
189 break;
190 }
191 sector = buffer[11] + (buffer[10] << 8) +
192 (buffer[9] << 16) + (buffer[8] << 24);
193 if (buffer[6] <= 1) {
194 /* ignore sector offsets from first track */
195 sector = 0;
196 }
197 break;
198
199 #ifdef CONFIG_BLK_DEV_SR_VENDOR
200 case VENDOR_NEC:{
201 unsigned long min, sec, frame;
202 memset(cmd, 0, MAX_COMMAND_SIZE);
203 cmd[0] = 0xde;
204 cmd[1] = (scsi_CDs[minor].device->scsi_level <= SCSI_2) ?
205 (scsi_CDs[minor].device->lun << 5) : 0;
206 cmd[1] |= 0x03;
207 cmd[2] = 0xb0;
208 rc = sr_do_ioctl(minor, cmd, buffer, 0x16, 1, SCSI_DATA_READ, NULL);
209 if (rc != 0)
210 break;
211 if (buffer[14] != 0 && buffer[14] != 0xb0) {
212 printk(KERN_INFO "sr%d: Hmm, seems the cdrom "
213 "doesn't support multisession CD's\n", minor);
214 no_multi = 1;
215 break;
216 }
217 min = BCD_TO_BIN(buffer[15]);
218 sec = BCD_TO_BIN(buffer[16]);
219 frame = BCD_TO_BIN(buffer[17]);
220 sector = min * CD_SECS * CD_FRAMES + sec * CD_FRAMES + frame;
221 break;
222 }
223
224 case VENDOR_TOSHIBA:{
225 unsigned long min, sec, frame;
226
227 /* we request some disc information (is it a XA-CD ?,
228 * where starts the last session ?) */
229 memset(cmd, 0, MAX_COMMAND_SIZE);
230 cmd[0] = 0xc7;
231 cmd[1] = (scsi_CDs[minor].device->scsi_level <= SCSI_2) ?
232 (scsi_CDs[minor].device->lun << 5) : 0;
233 cmd[1] |= 0x03;
234 rc = sr_do_ioctl(minor, cmd, buffer, 4, 1, SCSI_DATA_READ, NULL);
235 if (rc == -EINVAL) {
236 printk(KERN_INFO "sr%d: Hmm, seems the drive "
237 "doesn't support multisession CD's\n", minor);
238 no_multi = 1;
239 break;
240 }
241 if (rc != 0)
242 break;
243 min = BCD_TO_BIN(buffer[1]);
244 sec = BCD_TO_BIN(buffer[2]);
245 frame = BCD_TO_BIN(buffer[3]);
246 sector = min * CD_SECS * CD_FRAMES + sec * CD_FRAMES + frame;
247 if (sector)
248 sector -= CD_MSF_OFFSET;
249 sr_set_blocklength(minor, 2048);
250 break;
251 }
252
253 case VENDOR_WRITER:
254 memset(cmd, 0, MAX_COMMAND_SIZE);
255 cmd[0] = READ_TOC;
256 cmd[1] = (scsi_CDs[minor].device->scsi_level <= SCSI_2) ?
257 (scsi_CDs[minor].device->lun << 5) : 0;
258 cmd[8] = 0x04;
259 cmd[9] = 0x40;
260 rc = sr_do_ioctl(minor, cmd, buffer, 0x04, 1, SCSI_DATA_READ, NULL);
261 if (rc != 0) {
262 break;
263 }
264 if ((rc = buffer[2]) == 0) {
265 printk(KERN_WARNING
266 "sr%d: No finished session\n", minor);
267 break;
268 }
269 cmd[0] = READ_TOC; /* Read TOC */
270 cmd[1] = (scsi_CDs[minor].device->scsi_level <= SCSI_2) ?
271 (scsi_CDs[minor].device->lun << 5) : 0;
272 cmd[6] = rc & 0x7f; /* number of last session */
273 cmd[8] = 0x0c;
274 cmd[9] = 0x40;
275 rc = sr_do_ioctl(minor, cmd, buffer, 12, 1, SCSI_DATA_READ, NULL);
276 if (rc != 0) {
277 break;
278 }
279 sector = buffer[11] + (buffer[10] << 8) +
280 (buffer[9] << 16) + (buffer[8] << 24);
281 break;
282 #endif /* CONFIG_BLK_DEV_SR_VENDOR */
283
284 default:
285 /* should not happen */
286 printk(KERN_WARNING
287 "sr%d: unknown vendor code (%i), not initialized ?\n",
288 minor, VENDOR_ID);
289 sector = 0;
290 no_multi = 1;
291 break;
292 }
293 scsi_CDs[minor].ms_offset = sector;
294 scsi_CDs[minor].xa_flag = 0;
295 if (CDS_AUDIO != sr_disk_status(cdi) && 1 == sr_is_xa(minor))
296 scsi_CDs[minor].xa_flag = 1;
297
298 if (2048 != scsi_CDs[minor].device->sector_size) {
299 sr_set_blocklength(minor, 2048);
300 }
301 if (no_multi)
302 cdi->mask |= CDC_MULTI_SESSION;
303
304 #ifdef DEBUG
305 if (sector)
306 printk(KERN_DEBUG "sr%d: multisession offset=%lu\n",
307 minor, sector);
308 #endif
309 scsi_free(buffer, 512);
310 return rc;
311 }
312