]>
Commit | Line | Data |
---|---|---|
500856eb | 1 | /* |
f2302d44 | 2 | * (C) Copyright 2007-2008 Semihalf |
500856eb RJ |
3 | * |
4 | * Written by: Rafal Jaworowski <raj@semihalf.com> | |
5 | * | |
1a459660 | 6 | * SPDX-License-Identifier: GPL-2.0+ |
500856eb RJ |
7 | */ |
8 | ||
9 | #include <config.h> | |
500856eb RJ |
10 | #include <common.h> |
11 | #include <api_public.h> | |
12 | ||
3d0ea311 MF |
13 | #if defined(CONFIG_CMD_USB) && defined(CONFIG_USB_STORAGE) |
14 | #include <usb.h> | |
15 | #endif | |
16 | ||
500856eb RJ |
17 | #define DEBUG |
18 | #undef DEBUG | |
19 | ||
20 | #ifdef DEBUG | |
21 | #define debugf(fmt, args...) do { printf("%s(): ", __func__); printf(fmt, ##args); } while (0) | |
22 | #else | |
23 | #define debugf(fmt, args...) | |
24 | #endif | |
25 | ||
26 | #define errf(fmt, args...) do { printf("ERROR @ %s(): ", __func__); printf(fmt, ##args); } while (0) | |
27 | ||
28 | ||
29 | #define ENUM_IDE 0 | |
30 | #define ENUM_USB 1 | |
31 | #define ENUM_SCSI 2 | |
32 | #define ENUM_MMC 3 | |
f2302d44 SR |
33 | #define ENUM_SATA 4 |
34 | #define ENUM_MAX 5 | |
500856eb RJ |
35 | |
36 | struct stor_spec { | |
37 | int max_dev; | |
38 | int enum_started; | |
39 | int enum_ended; | |
40 | int type; /* "external" type: DT_STOR_{IDE,USB,etc} */ | |
f2302d44 | 41 | char *name; |
500856eb RJ |
42 | }; |
43 | ||
44 | static struct stor_spec specs[ENUM_MAX] = { { 0, 0, 0, 0, "" }, }; | |
45 | ||
46 | ||
47 | void dev_stor_init(void) | |
48 | { | |
1b769881 | 49 | #if defined(CONFIG_CMD_IDE) |
6d0f6bcf | 50 | specs[ENUM_IDE].max_dev = CONFIG_SYS_IDE_MAXDEVICE; |
500856eb RJ |
51 | specs[ENUM_IDE].enum_started = 0; |
52 | specs[ENUM_IDE].enum_ended = 0; | |
53 | specs[ENUM_IDE].type = DEV_TYP_STOR | DT_STOR_IDE; | |
54 | specs[ENUM_IDE].name = "ide"; | |
55 | #endif | |
f2302d44 | 56 | #if defined(CONFIG_CMD_MMC) |
6d0f6bcf | 57 | specs[ENUM_MMC].max_dev = CONFIG_SYS_MMC_MAX_DEVICE; |
f2302d44 SR |
58 | specs[ENUM_MMC].enum_started = 0; |
59 | specs[ENUM_MMC].enum_ended = 0; | |
60 | specs[ENUM_MMC].type = DEV_TYP_STOR | DT_STOR_MMC; | |
61 | specs[ENUM_MMC].name = "mmc"; | |
62 | #endif | |
63 | #if defined(CONFIG_CMD_SATA) | |
6d0f6bcf | 64 | specs[ENUM_SATA].max_dev = CONFIG_SYS_SATA_MAX_DEVICE; |
f2302d44 SR |
65 | specs[ENUM_SATA].enum_started = 0; |
66 | specs[ENUM_SATA].enum_ended = 0; | |
67 | specs[ENUM_SATA].type = DEV_TYP_STOR | DT_STOR_SATA; | |
68 | specs[ENUM_SATA].name = "sata"; | |
500856eb | 69 | #endif |
1b769881 | 70 | #if defined(CONFIG_CMD_SCSI) |
6d0f6bcf | 71 | specs[ENUM_SCSI].max_dev = CONFIG_SYS_SCSI_MAX_DEVICE; |
500856eb RJ |
72 | specs[ENUM_SCSI].enum_started = 0; |
73 | specs[ENUM_SCSI].enum_ended = 0; | |
74 | specs[ENUM_SCSI].type = DEV_TYP_STOR | DT_STOR_SCSI; | |
75 | specs[ENUM_SCSI].name = "scsi"; | |
76 | #endif | |
f2302d44 SR |
77 | #if defined(CONFIG_CMD_USB) && defined(CONFIG_USB_STORAGE) |
78 | specs[ENUM_USB].max_dev = USB_MAX_STOR_DEV; | |
79 | specs[ENUM_USB].enum_started = 0; | |
80 | specs[ENUM_USB].enum_ended = 0; | |
81 | specs[ENUM_USB].type = DEV_TYP_STOR | DT_STOR_USB; | |
82 | specs[ENUM_USB].name = "usb"; | |
83 | #endif | |
500856eb RJ |
84 | } |
85 | ||
86 | /* | |
87 | * Finds next available device in the storage group | |
88 | * | |
89 | * type: storage group type - ENUM_IDE, ENUM_SCSI etc. | |
90 | * | |
91 | * first: if 1 the first device in the storage group is returned (if | |
92 | * exists), if 0 the next available device is searched | |
93 | * | |
94 | * more: returns 0/1 depending if there are more devices in this group | |
95 | * available (for future iterations) | |
96 | * | |
97 | * returns: 0/1 depending if device found in this iteration | |
98 | */ | |
99 | static int dev_stor_get(int type, int first, int *more, struct device_info *di) | |
100 | { | |
101 | int found = 0; | |
102 | *more = 0; | |
103 | ||
104 | int i; | |
105 | ||
106 | block_dev_desc_t *dd; | |
107 | ||
108 | if (first) { | |
109 | di->cookie = (void *)get_dev(specs[type].name, 0); | |
f2302d44 SR |
110 | if (di->cookie == NULL) |
111 | return 0; | |
112 | else | |
113 | found = 1; | |
500856eb | 114 | |
ce2a07b7 AF |
115 | /* provide hint if there are more devices in |
116 | * this group to enumerate */ | |
117 | if (1 < specs[type].max_dev) | |
118 | *more = 1; | |
119 | ||
500856eb RJ |
120 | } else { |
121 | for (i = 0; i < specs[type].max_dev; i++) | |
122 | if (di->cookie == (void *)get_dev(specs[type].name, i)) { | |
123 | /* previous cookie found -- advance to the | |
124 | * next device, if possible */ | |
125 | ||
126 | if (++i >= specs[type].max_dev) { | |
127 | /* out of range, no more to enum */ | |
128 | di->cookie = NULL; | |
129 | break; | |
130 | } | |
131 | ||
132 | di->cookie = (void *)get_dev(specs[type].name, i); | |
f2302d44 SR |
133 | if (di->cookie == NULL) |
134 | return 0; | |
135 | else | |
136 | found = 1; | |
500856eb RJ |
137 | |
138 | /* provide hint if there are more devices in | |
139 | * this group to enumerate */ | |
140 | if ((i + 1) < specs[type].max_dev) | |
141 | *more = 1; | |
142 | ||
143 | break; | |
144 | } | |
145 | } | |
146 | ||
147 | if (found) { | |
148 | di->type = specs[type].type; | |
149 | ||
150 | if (di->cookie != NULL) { | |
151 | dd = (block_dev_desc_t *)di->cookie; | |
152 | if (dd->type == DEV_TYPE_UNKNOWN) { | |
153 | debugf("device instance exists, but is not active.."); | |
154 | found = 0; | |
155 | } else { | |
156 | di->di_stor.block_count = dd->lba; | |
157 | di->di_stor.block_size = dd->blksz; | |
158 | } | |
159 | } | |
160 | ||
161 | } else | |
162 | di->cookie = NULL; | |
163 | ||
164 | return found; | |
165 | } | |
166 | ||
167 | ||
168 | /* | |
169 | * returns: ENUM_IDE, ENUM_USB etc. based on block_dev_desc_t | |
170 | */ | |
171 | static int dev_stor_type(block_dev_desc_t *dd) | |
172 | { | |
173 | int i, j; | |
174 | ||
175 | for (i = ENUM_IDE; i < ENUM_MAX; i++) | |
176 | for (j = 0; j < specs[i].max_dev; j++) | |
177 | if (dd == get_dev(specs[i].name, j)) | |
178 | return i; | |
179 | ||
180 | return ENUM_MAX; | |
181 | } | |
182 | ||
183 | ||
184 | /* | |
185 | * returns: 0/1 whether cookie points to some device in this group | |
186 | */ | |
187 | static int dev_is_stor(int type, struct device_info *di) | |
188 | { | |
189 | return (dev_stor_type(di->cookie) == type) ? 1 : 0; | |
190 | } | |
191 | ||
192 | ||
193 | static int dev_enum_stor(int type, struct device_info *di) | |
194 | { | |
195 | int found = 0, more = 0; | |
196 | ||
197 | debugf("called, type %d\n", type); | |
198 | ||
199 | /* | |
200 | * Formulae for enumerating storage devices: | |
201 | * 1. if cookie (hint from previous enum call) is NULL we start again | |
202 | * with enumeration, so return the first available device, done. | |
203 | * | |
204 | * 2. if cookie is not NULL, check if it identifies some device in | |
205 | * this group: | |
206 | * | |
207 | * 2a. if cookie is a storage device from our group (IDE, USB etc.), | |
208 | * return next available (if exists) in this group | |
209 | * | |
210 | * 2b. if it isn't device from our group, check if such devices were | |
211 | * ever enumerated before: | |
212 | * - if not, return the first available device from this group | |
213 | * - else return 0 | |
214 | */ | |
215 | ||
216 | if (di->cookie == NULL) { | |
217 | ||
218 | debugf("group%d - enum restart\n", type); | |
219 | ||
220 | /* | |
221 | * 1. Enumeration (re-)started: take the first available | |
222 | * device, if exists | |
223 | */ | |
224 | found = dev_stor_get(type, 1, &more, di); | |
225 | specs[type].enum_started = 1; | |
226 | ||
227 | } else if (dev_is_stor(type, di)) { | |
228 | ||
229 | debugf("group%d - enum continued for the next device\n", type); | |
230 | ||
231 | if (specs[type].enum_ended) { | |
232 | debugf("group%d - nothing more to enum!\n", type); | |
233 | return 0; | |
234 | } | |
235 | ||
236 | /* 2a. Attempt to take a next available device in the group */ | |
237 | found = dev_stor_get(type, 0, &more, di); | |
238 | ||
239 | } else { | |
240 | ||
241 | if (specs[type].enum_ended) { | |
242 | debugf("group %d - already enumerated, skipping\n", type); | |
243 | return 0; | |
244 | } | |
245 | ||
246 | debugf("group%d - first time enum\n", type); | |
247 | ||
248 | if (specs[type].enum_started == 0) { | |
249 | /* | |
250 | * 2b. If enumerating devices in this group did not | |
251 | * happen before, it means the cookie pointed to a | |
252 | * device frome some other group (another storage | |
253 | * group, or network); in this case try to take the | |
254 | * first available device from our group | |
255 | */ | |
256 | specs[type].enum_started = 1; | |
257 | ||
258 | /* | |
259 | * Attempt to take the first device in this group: | |
260 | *'first element' flag is set | |
261 | */ | |
262 | found = dev_stor_get(type, 1, &more, di); | |
263 | ||
264 | } else { | |
265 | errf("group%d - out of order iteration\n", type); | |
266 | found = 0; | |
267 | more = 0; | |
268 | } | |
269 | } | |
270 | ||
271 | /* | |
272 | * If there are no more devices in this group, consider its | |
273 | * enumeration finished | |
274 | */ | |
275 | specs[type].enum_ended = (!more) ? 1 : 0; | |
276 | ||
277 | if (found) | |
278 | debugf("device found, returning cookie 0x%08x\n", | |
279 | (u_int32_t)di->cookie); | |
280 | else | |
281 | debugf("no device found\n"); | |
282 | ||
283 | return found; | |
284 | } | |
285 | ||
286 | void dev_enum_reset(void) | |
287 | { | |
288 | int i; | |
289 | ||
290 | for (i = 0; i < ENUM_MAX; i ++) { | |
291 | specs[i].enum_started = 0; | |
292 | specs[i].enum_ended = 0; | |
293 | } | |
294 | } | |
295 | ||
296 | int dev_enum_storage(struct device_info *di) | |
297 | { | |
298 | int i; | |
299 | ||
300 | /* | |
301 | * check: ide, usb, scsi, mmc | |
302 | */ | |
303 | for (i = ENUM_IDE; i < ENUM_MAX; i ++) { | |
304 | if (dev_enum_stor(i, di)) | |
305 | return 1; | |
306 | } | |
307 | ||
308 | return 0; | |
309 | } | |
310 | ||
311 | static int dev_stor_is_valid(int type, block_dev_desc_t *dd) | |
312 | { | |
313 | int i; | |
314 | ||
315 | for (i = 0; i < specs[type].max_dev; i++) | |
316 | if (dd == get_dev(specs[type].name, i)) | |
317 | if (dd->type != DEV_TYPE_UNKNOWN) | |
318 | return 1; | |
319 | ||
320 | return 0; | |
321 | } | |
322 | ||
323 | ||
324 | int dev_open_stor(void *cookie) | |
325 | { | |
326 | int type = dev_stor_type(cookie); | |
327 | ||
328 | if (type == ENUM_MAX) | |
329 | return API_ENODEV; | |
330 | ||
331 | if (dev_stor_is_valid(type, (block_dev_desc_t *)cookie)) | |
332 | return 0; | |
333 | ||
334 | return API_ENODEV; | |
335 | } | |
336 | ||
337 | ||
338 | int dev_close_stor(void *cookie) | |
339 | { | |
340 | /* | |
341 | * Not much to do as we actually do not alter storage devices upon | |
342 | * close | |
343 | */ | |
344 | return 0; | |
345 | } | |
346 | ||
347 | ||
348 | static int dev_stor_index(block_dev_desc_t *dd) | |
349 | { | |
350 | int i, type; | |
351 | ||
352 | type = dev_stor_type(dd); | |
353 | for (i = 0; i < specs[type].max_dev; i++) | |
354 | if (dd == get_dev(specs[type].name, i)) | |
355 | return i; | |
356 | ||
357 | return (specs[type].max_dev); | |
358 | } | |
359 | ||
360 | ||
361 | lbasize_t dev_read_stor(void *cookie, void *buf, lbasize_t len, lbastart_t start) | |
362 | { | |
363 | int type; | |
364 | block_dev_desc_t *dd = (block_dev_desc_t *)cookie; | |
365 | ||
366 | if ((type = dev_stor_type(dd)) == ENUM_MAX) | |
367 | return 0; | |
368 | ||
369 | if (!dev_stor_is_valid(type, dd)) | |
370 | return 0; | |
371 | ||
372 | if ((dd->block_read) == NULL) { | |
f2302d44 | 373 | debugf("no block_read() for device 0x%08x\n", cookie); |
500856eb RJ |
374 | return 0; |
375 | } | |
376 | ||
377 | return (dd->block_read(dev_stor_index(dd), start, len, buf)); | |
378 | } |