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