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->lun << 5) | (1 << 4);
128 cmd[4] = 12;
129 modesel = (struct ccs_modesel_head *) buffer;
130 memset(modesel, 0, sizeof(*modesel));
131 modesel->block_desc_length = 0x08;
132 modesel->density = density;
133 modesel->block_length_med = (blocklength >> 8) & 0xff;
134 modesel->block_length_lo = blocklength & 0xff;
135 if (0 == (rc = sr_do_ioctl(minor, cmd, buffer, sizeof(*modesel), 0, SCSI_DATA_WRITE, NULL))) {
136 scsi_CDs[minor].device->sector_size = blocklength;
137 }
138 #ifdef DEBUG
139 else
140 printk("sr%d: switching blocklength to %d bytes failed\n",
141 minor, blocklength);
142 #endif
143 scsi_free(buffer, 512);
144 return rc;
145 }
146
147 /* This function gets called after a media change. Checks if the CD is
148 multisession, asks for offset etc. */
149
150 #define BCD_TO_BIN(x) ((((int)x & 0xf0) >> 4)*10 + ((int)x & 0x0f))
151
152 int sr_cd_check(struct cdrom_device_info *cdi)
153 {
154 unsigned long sector;
155 unsigned char *buffer; /* the buffer for the ioctl */
156 unsigned char cmd[MAX_COMMAND_SIZE]; /* the scsi-command */
157 int rc, no_multi, minor;
158
159 minor = MINOR(cdi->dev);
160 if (scsi_CDs[minor].cdi.mask & CDC_MULTI_SESSION)
161 return 0;
162
163 buffer = (unsigned char *) scsi_malloc(512);
164 if (!buffer)
165 return -ENOMEM;
166
167 sector = 0; /* the multisession sector offset goes here */
168 no_multi = 0; /* flag: the drive can't handle multisession */
169 rc = 0;
170
171 switch (VENDOR_ID) {
172
173 case VENDOR_SCSI3:
174 memset(cmd, 0, MAX_COMMAND_SIZE);
175 cmd[0] = READ_TOC;
176 cmd[1] = (scsi_CDs[minor].device->lun << 5);
177 cmd[8] = 12;
178 cmd[9] = 0x40;
179 rc = sr_do_ioctl(minor, cmd, buffer, 12, 1, SCSI_DATA_READ, NULL);
180 if (rc != 0)
181 break;
182 if ((buffer[0] << 8) + buffer[1] < 0x0a) {
183 printk(KERN_INFO "sr%d: Hmm, seems the drive "
184 "doesn't support multisession CD's\n", minor);
185 no_multi = 1;
186 break;
187 }
188 sector = buffer[11] + (buffer[10] << 8) +
189 (buffer[9] << 16) + (buffer[8] << 24);
190 if (buffer[6] <= 1) {
191 /* ignore sector offsets from first track */
192 sector = 0;
193 }
194 break;
195
196 #ifdef CONFIG_BLK_DEV_SR_VENDOR
197 case VENDOR_NEC:{
198 unsigned long min, sec, frame;
199 memset(cmd, 0, MAX_COMMAND_SIZE);
200 cmd[0] = 0xde;
201 cmd[1] = (scsi_CDs[minor].device->lun << 5) | 0x03;
202 cmd[2] = 0xb0;
203 rc = sr_do_ioctl(minor, cmd, buffer, 0x16, 1, SCSI_DATA_READ, NULL);
204 if (rc != 0)
205 break;
206 if (buffer[14] != 0 && buffer[14] != 0xb0) {
207 printk(KERN_INFO "sr%d: Hmm, seems the cdrom "
208 "doesn't support multisession CD's\n", minor);
209 no_multi = 1;
210 break;
211 }
212 min = BCD_TO_BIN(buffer[15]);
213 sec = BCD_TO_BIN(buffer[16]);
214 frame = BCD_TO_BIN(buffer[17]);
215 sector = min * CD_SECS * CD_FRAMES + sec * CD_FRAMES + frame;
216 break;
217 }
218
219 case VENDOR_TOSHIBA:{
220 unsigned long min, sec, frame;
221
222 /* we request some disc information (is it a XA-CD ?,
223 * where starts the last session ?) */
224 memset(cmd, 0, MAX_COMMAND_SIZE);
225 cmd[0] = 0xc7;
226 cmd[1] = (scsi_CDs[minor].device->lun << 5) | 3;
227 rc = sr_do_ioctl(minor, cmd, buffer, 4, 1, SCSI_DATA_READ, NULL);
228 if (rc == -EINVAL) {
229 printk(KERN_INFO "sr%d: Hmm, seems the drive "
230 "doesn't support multisession CD's\n", minor);
231 no_multi = 1;
232 break;
233 }
234 if (rc != 0)
235 break;
236 min = BCD_TO_BIN(buffer[1]);
237 sec = BCD_TO_BIN(buffer[2]);
238 frame = BCD_TO_BIN(buffer[3]);
239 sector = min * CD_SECS * CD_FRAMES + sec * CD_FRAMES + frame;
240 if (sector)
241 sector -= CD_MSF_OFFSET;
242 sr_set_blocklength(minor, 2048);
243 break;
244 }
245
246 case VENDOR_WRITER:
247 memset(cmd, 0, MAX_COMMAND_SIZE);
248 cmd[0] = READ_TOC;
249 cmd[1] = (scsi_CDs[minor].device->lun << 5);
250 cmd[8] = 0x04;
251 cmd[9] = 0x40;
252 rc = sr_do_ioctl(minor, cmd, buffer, 0x04, 1, SCSI_DATA_READ, NULL);
253 if (rc != 0) {
254 break;
255 }
256 if ((rc = buffer[2]) == 0) {
257 printk(KERN_WARNING
258 "sr%d: No finished session\n", minor);
259 break;
260 }
261 cmd[0] = READ_TOC; /* Read TOC */
262 cmd[1] = (scsi_CDs[minor].device->lun << 5);
263 cmd[6] = rc & 0x7f; /* number of last session */
264 cmd[8] = 0x0c;
265 cmd[9] = 0x40;
266 rc = sr_do_ioctl(minor, cmd, buffer, 12, 1, SCSI_DATA_READ, NULL);
267 if (rc != 0) {
268 break;
269 }
270 sector = buffer[11] + (buffer[10] << 8) +
271 (buffer[9] << 16) + (buffer[8] << 24);
272 break;
273 #endif /* CONFIG_BLK_DEV_SR_VENDOR */
274
275 default:
276 /* should not happen */
277 printk(KERN_WARNING
278 "sr%d: unknown vendor code (%i), not initialized ?\n",
279 minor, VENDOR_ID);
280 sector = 0;
281 no_multi = 1;
282 break;
283 }
284 scsi_CDs[minor].ms_offset = sector;
285 scsi_CDs[minor].xa_flag = 0;
286 if (CDS_AUDIO != sr_disk_status(cdi) && 1 == sr_is_xa(minor))
287 scsi_CDs[minor].xa_flag = 1;
288
289 if (2048 != scsi_CDs[minor].device->sector_size) {
290 sr_set_blocklength(minor, 2048);
291 }
292 if (no_multi)
293 cdi->mask |= CDC_MULTI_SESSION;
294
295 #ifdef DEBUG
296 if (sector)
297 printk(KERN_DEBUG "sr%d: multisession offset=%lu\n",
298 minor, sector);
299 #endif
300 scsi_free(buffer, 512);
301 return rc;
302 }
303
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