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b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
1da177e4 LT |
2 | /* -*-linux-c-*- |
3 | ||
4 | * vendor-specific code for SCSI CD-ROM's goes here. | |
5 | * | |
6 | * This is needed becauce most of the new features (multisession and | |
7 | * the like) are too new to be included into the SCSI-II standard (to | |
8 | * be exact: there is'nt anything in my draft copy). | |
9 | * | |
10 | * Aug 1997: Ha! Got a SCSI-3 cdrom spec across my fingers. SCSI-3 does | |
11 | * multisession using the READ TOC command (like SONY). | |
12 | * | |
13 | * Rearranged stuff here: SCSI-3 is included allways, support | |
14 | * for NEC/TOSHIBA/HP commands is optional. | |
15 | * | |
16 | * Gerd Knorr <kraxel@cs.tu-berlin.de> | |
17 | * | |
18 | * -------------------------------------------------------------------------- | |
19 | * | |
20 | * support for XA/multisession-CD's | |
21 | * | |
22 | * - NEC: Detection and support of multisession CD's. | |
23 | * | |
24 | * - TOSHIBA: Detection and support of multisession CD's. | |
25 | * Some XA-Sector tweaking, required for older drives. | |
26 | * | |
27 | * - SONY: Detection and support of multisession CD's. | |
28 | * added by Thomas Quinot <thomas@cuivre.freenix.fr> | |
29 | * | |
30 | * - PIONEER, HITACHI, PLEXTOR, MATSHITA, TEAC, PHILIPS: known to | |
31 | * work with SONY (SCSI3 now) code. | |
32 | * | |
33 | * - HP: Much like SONY, but a little different... (Thomas) | |
34 | * HP-Writers only ??? Maybe other CD-Writers work with this too ? | |
35 | * HP 6020 writers now supported. | |
36 | */ | |
37 | ||
1da177e4 LT |
38 | #include <linux/cdrom.h> |
39 | #include <linux/errno.h> | |
40 | #include <linux/string.h> | |
41 | #include <linux/bcd.h> | |
42 | #include <linux/blkdev.h> | |
5a0e3ad6 | 43 | #include <linux/slab.h> |
1da177e4 LT |
44 | |
45 | #include <scsi/scsi.h> | |
46 | #include <scsi/scsi_cmnd.h> | |
47 | #include <scsi/scsi_device.h> | |
48 | #include <scsi/scsi_host.h> | |
49 | #include <scsi/scsi_ioctl.h> | |
50 | ||
51 | #include "sr.h" | |
52 | ||
53 | #if 0 | |
54 | #define DEBUG | |
55 | #endif | |
56 | ||
57 | /* here are some constants to sort the vendors into groups */ | |
58 | ||
59 | #define VENDOR_SCSI3 1 /* default: scsi-3 mmc */ | |
60 | ||
61 | #define VENDOR_NEC 2 | |
62 | #define VENDOR_TOSHIBA 3 | |
63 | #define VENDOR_WRITER 4 /* pre-scsi3 writers */ | |
64 | ||
65 | #define VENDOR_TIMEOUT 30*HZ | |
66 | ||
67 | void sr_vendor_init(Scsi_CD *cd) | |
68 | { | |
69 | #ifndef CONFIG_BLK_DEV_SR_VENDOR | |
70 | cd->vendor = VENDOR_SCSI3; | |
71 | #else | |
7b32b8e0 MW |
72 | const char *vendor = cd->device->vendor; |
73 | const char *model = cd->device->model; | |
1da177e4 LT |
74 | |
75 | /* default */ | |
76 | cd->vendor = VENDOR_SCSI3; | |
77 | if (cd->readcd_known) | |
78 | /* this is true for scsi3/mmc drives - no more checks */ | |
79 | return; | |
80 | ||
81 | if (cd->device->type == TYPE_WORM) { | |
82 | cd->vendor = VENDOR_WRITER; | |
83 | ||
84 | } else if (!strncmp(vendor, "NEC", 3)) { | |
85 | cd->vendor = VENDOR_NEC; | |
86 | if (!strncmp(model, "CD-ROM DRIVE:25", 15) || | |
87 | !strncmp(model, "CD-ROM DRIVE:36", 15) || | |
88 | !strncmp(model, "CD-ROM DRIVE:83", 15) || | |
89 | !strncmp(model, "CD-ROM DRIVE:84 ", 16) | |
90 | #if 0 | |
91 | /* my NEC 3x returns the read-raw data if a read-raw | |
92 | is followed by a read for the same sector - aeb */ | |
93 | || !strncmp(model, "CD-ROM DRIVE:500", 16) | |
94 | #endif | |
95 | ) | |
96 | /* these can't handle multisession, may hang */ | |
97 | cd->cdi.mask |= CDC_MULTI_SESSION; | |
98 | ||
99 | } else if (!strncmp(vendor, "TOSHIBA", 7)) { | |
100 | cd->vendor = VENDOR_TOSHIBA; | |
101 | ||
102 | } | |
103 | #endif | |
104 | } | |
105 | ||
106 | ||
107 | /* small handy function for switching block length using MODE SELECT, | |
108 | * used by sr_read_sector() */ | |
109 | ||
110 | int sr_set_blocklength(Scsi_CD *cd, int blocklength) | |
111 | { | |
112 | unsigned char *buffer; /* the buffer for the ioctl */ | |
113 | struct packet_command cgc; | |
114 | struct ccs_modesel_head *modesel; | |
115 | int rc, density = 0; | |
116 | ||
117 | #ifdef CONFIG_BLK_DEV_SR_VENDOR | |
118 | if (cd->vendor == VENDOR_TOSHIBA) | |
119 | density = (blocklength > 2048) ? 0x81 : 0x83; | |
120 | #endif | |
121 | ||
5cbded58 | 122 | buffer = kmalloc(512, GFP_KERNEL | GFP_DMA); |
1da177e4 LT |
123 | if (!buffer) |
124 | return -ENOMEM; | |
125 | ||
126 | #ifdef DEBUG | |
96eefad2 | 127 | sr_printk(KERN_INFO, cd, "MODE SELECT 0x%x/%d\n", density, blocklength); |
1da177e4 LT |
128 | #endif |
129 | memset(&cgc, 0, sizeof(struct packet_command)); | |
130 | cgc.cmd[0] = MODE_SELECT; | |
131 | cgc.cmd[1] = (1 << 4); | |
132 | cgc.cmd[4] = 12; | |
133 | modesel = (struct ccs_modesel_head *) buffer; | |
134 | memset(modesel, 0, sizeof(*modesel)); | |
135 | modesel->block_desc_length = 0x08; | |
136 | modesel->density = density; | |
137 | modesel->block_length_med = (blocklength >> 8) & 0xff; | |
138 | modesel->block_length_lo = blocklength & 0xff; | |
139 | cgc.buffer = buffer; | |
140 | cgc.buflen = sizeof(*modesel); | |
141 | cgc.data_direction = DMA_TO_DEVICE; | |
142 | cgc.timeout = VENDOR_TIMEOUT; | |
143 | if (0 == (rc = sr_do_ioctl(cd, &cgc))) { | |
144 | cd->device->sector_size = blocklength; | |
145 | } | |
146 | #ifdef DEBUG | |
147 | else | |
96eefad2 HR |
148 | sr_printk(KERN_INFO, cd, |
149 | "switching blocklength to %d bytes failed\n", | |
150 | blocklength); | |
1da177e4 LT |
151 | #endif |
152 | kfree(buffer); | |
153 | return rc; | |
154 | } | |
155 | ||
156 | /* This function gets called after a media change. Checks if the CD is | |
157 | multisession, asks for offset etc. */ | |
158 | ||
159 | int sr_cd_check(struct cdrom_device_info *cdi) | |
160 | { | |
161 | Scsi_CD *cd = cdi->handle; | |
162 | unsigned long sector; | |
163 | unsigned char *buffer; /* the buffer for the ioctl */ | |
164 | struct packet_command cgc; | |
165 | int rc, no_multi; | |
166 | ||
167 | if (cd->cdi.mask & CDC_MULTI_SESSION) | |
168 | return 0; | |
169 | ||
5cbded58 | 170 | buffer = kmalloc(512, GFP_KERNEL | GFP_DMA); |
1da177e4 LT |
171 | if (!buffer) |
172 | return -ENOMEM; | |
173 | ||
174 | sector = 0; /* the multisession sector offset goes here */ | |
175 | no_multi = 0; /* flag: the drive can't handle multisession */ | |
176 | rc = 0; | |
177 | ||
178 | memset(&cgc, 0, sizeof(struct packet_command)); | |
179 | ||
180 | switch (cd->vendor) { | |
181 | ||
182 | case VENDOR_SCSI3: | |
183 | cgc.cmd[0] = READ_TOC; | |
184 | cgc.cmd[8] = 12; | |
185 | cgc.cmd[9] = 0x40; | |
186 | cgc.buffer = buffer; | |
187 | cgc.buflen = 12; | |
188 | cgc.quiet = 1; | |
189 | cgc.data_direction = DMA_FROM_DEVICE; | |
190 | cgc.timeout = VENDOR_TIMEOUT; | |
191 | rc = sr_do_ioctl(cd, &cgc); | |
192 | if (rc != 0) | |
193 | break; | |
194 | if ((buffer[0] << 8) + buffer[1] < 0x0a) { | |
96eefad2 HR |
195 | sr_printk(KERN_INFO, cd, "Hmm, seems the drive " |
196 | "doesn't support multisession CD's\n"); | |
1da177e4 LT |
197 | no_multi = 1; |
198 | break; | |
199 | } | |
200 | sector = buffer[11] + (buffer[10] << 8) + | |
201 | (buffer[9] << 16) + (buffer[8] << 24); | |
202 | if (buffer[6] <= 1) { | |
203 | /* ignore sector offsets from first track */ | |
204 | sector = 0; | |
205 | } | |
206 | break; | |
207 | ||
208 | #ifdef CONFIG_BLK_DEV_SR_VENDOR | |
209 | case VENDOR_NEC:{ | |
210 | unsigned long min, sec, frame; | |
211 | cgc.cmd[0] = 0xde; | |
212 | cgc.cmd[1] = 0x03; | |
213 | cgc.cmd[2] = 0xb0; | |
214 | cgc.buffer = buffer; | |
215 | cgc.buflen = 0x16; | |
216 | cgc.quiet = 1; | |
217 | cgc.data_direction = DMA_FROM_DEVICE; | |
218 | cgc.timeout = VENDOR_TIMEOUT; | |
219 | rc = sr_do_ioctl(cd, &cgc); | |
220 | if (rc != 0) | |
221 | break; | |
222 | if (buffer[14] != 0 && buffer[14] != 0xb0) { | |
96eefad2 HR |
223 | sr_printk(KERN_INFO, cd, "Hmm, seems the cdrom " |
224 | "doesn't support multisession CD's\n"); | |
225 | ||
1da177e4 LT |
226 | no_multi = 1; |
227 | break; | |
228 | } | |
2cee5dfa AB |
229 | min = bcd2bin(buffer[15]); |
230 | sec = bcd2bin(buffer[16]); | |
231 | frame = bcd2bin(buffer[17]); | |
1da177e4 LT |
232 | sector = min * CD_SECS * CD_FRAMES + sec * CD_FRAMES + frame; |
233 | break; | |
234 | } | |
235 | ||
236 | case VENDOR_TOSHIBA:{ | |
237 | unsigned long min, sec, frame; | |
238 | ||
239 | /* we request some disc information (is it a XA-CD ?, | |
240 | * where starts the last session ?) */ | |
241 | cgc.cmd[0] = 0xc7; | |
242 | cgc.cmd[1] = 0x03; | |
243 | cgc.buffer = buffer; | |
244 | cgc.buflen = 4; | |
245 | cgc.quiet = 1; | |
246 | cgc.data_direction = DMA_FROM_DEVICE; | |
247 | cgc.timeout = VENDOR_TIMEOUT; | |
248 | rc = sr_do_ioctl(cd, &cgc); | |
249 | if (rc == -EINVAL) { | |
96eefad2 HR |
250 | sr_printk(KERN_INFO, cd, "Hmm, seems the drive " |
251 | "doesn't support multisession CD's\n"); | |
1da177e4 LT |
252 | no_multi = 1; |
253 | break; | |
254 | } | |
255 | if (rc != 0) | |
256 | break; | |
2cee5dfa AB |
257 | min = bcd2bin(buffer[1]); |
258 | sec = bcd2bin(buffer[2]); | |
259 | frame = bcd2bin(buffer[3]); | |
1da177e4 LT |
260 | sector = min * CD_SECS * CD_FRAMES + sec * CD_FRAMES + frame; |
261 | if (sector) | |
262 | sector -= CD_MSF_OFFSET; | |
263 | sr_set_blocklength(cd, 2048); | |
264 | break; | |
265 | } | |
266 | ||
267 | case VENDOR_WRITER: | |
268 | cgc.cmd[0] = READ_TOC; | |
269 | cgc.cmd[8] = 0x04; | |
270 | cgc.cmd[9] = 0x40; | |
271 | cgc.buffer = buffer; | |
272 | cgc.buflen = 0x04; | |
273 | cgc.quiet = 1; | |
274 | cgc.data_direction = DMA_FROM_DEVICE; | |
275 | cgc.timeout = VENDOR_TIMEOUT; | |
276 | rc = sr_do_ioctl(cd, &cgc); | |
277 | if (rc != 0) { | |
278 | break; | |
279 | } | |
280 | if ((rc = buffer[2]) == 0) { | |
96eefad2 HR |
281 | sr_printk(KERN_WARNING, cd, |
282 | "No finished session\n"); | |
1da177e4 LT |
283 | break; |
284 | } | |
285 | cgc.cmd[0] = READ_TOC; /* Read TOC */ | |
286 | cgc.cmd[6] = rc & 0x7f; /* number of last session */ | |
287 | cgc.cmd[8] = 0x0c; | |
288 | cgc.cmd[9] = 0x40; | |
289 | cgc.buffer = buffer; | |
290 | cgc.buflen = 12; | |
291 | cgc.quiet = 1; | |
292 | cgc.data_direction = DMA_FROM_DEVICE; | |
293 | cgc.timeout = VENDOR_TIMEOUT; | |
294 | rc = sr_do_ioctl(cd, &cgc); | |
295 | if (rc != 0) { | |
296 | break; | |
297 | } | |
298 | sector = buffer[11] + (buffer[10] << 8) + | |
299 | (buffer[9] << 16) + (buffer[8] << 24); | |
300 | break; | |
301 | #endif /* CONFIG_BLK_DEV_SR_VENDOR */ | |
302 | ||
303 | default: | |
304 | /* should not happen */ | |
96eefad2 HR |
305 | sr_printk(KERN_WARNING, cd, |
306 | "unknown vendor code (%i), not initialized ?\n", | |
307 | cd->vendor); | |
1da177e4 LT |
308 | sector = 0; |
309 | no_multi = 1; | |
310 | break; | |
311 | } | |
312 | cd->ms_offset = sector; | |
313 | cd->xa_flag = 0; | |
314 | if (CDS_AUDIO != sr_disk_status(cdi) && 1 == sr_is_xa(cd)) | |
315 | cd->xa_flag = 1; | |
316 | ||
317 | if (2048 != cd->device->sector_size) { | |
318 | sr_set_blocklength(cd, 2048); | |
319 | } | |
320 | if (no_multi) | |
321 | cdi->mask |= CDC_MULTI_SESSION; | |
322 | ||
323 | #ifdef DEBUG | |
324 | if (sector) | |
96eefad2 HR |
325 | sr_printk(KERN_DEBUG, cd, "multisession offset=%lu\n", |
326 | sector); | |
1da177e4 LT |
327 | #endif |
328 | kfree(buffer); | |
329 | return rc; | |
330 | } |