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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 | ||
5d81c6df | 44 | static struct stor_spec specs[ENUM_MAX] = { { 0, 0, 0, 0, NULL }, }; |
500856eb RJ |
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 |
c649e3c9 | 70 | #if defined(CONFIG_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 | ||
4101f687 | 106 | struct blk_desc *dd; |
500856eb | 107 | |
5d81c6df EV |
108 | /* Wasn't configured for this type, return 0 directly */ |
109 | if (specs[type].name == NULL) | |
110 | return 0; | |
111 | ||
500856eb | 112 | if (first) { |
db1d9e78 | 113 | di->cookie = (void *)blk_get_dev(specs[type].name, 0); |
f2302d44 SR |
114 | if (di->cookie == NULL) |
115 | return 0; | |
116 | else | |
117 | found = 1; | |
500856eb | 118 | |
ce2a07b7 AF |
119 | /* provide hint if there are more devices in |
120 | * this group to enumerate */ | |
121 | if (1 < specs[type].max_dev) | |
122 | *more = 1; | |
123 | ||
500856eb RJ |
124 | } else { |
125 | for (i = 0; i < specs[type].max_dev; i++) | |
db1d9e78 SG |
126 | if (di->cookie == |
127 | (void *)blk_get_dev(specs[type].name, i)) { | |
500856eb RJ |
128 | /* previous cookie found -- advance to the |
129 | * next device, if possible */ | |
130 | ||
131 | if (++i >= specs[type].max_dev) { | |
132 | /* out of range, no more to enum */ | |
133 | di->cookie = NULL; | |
134 | break; | |
135 | } | |
136 | ||
db1d9e78 SG |
137 | di->cookie = (void *)blk_get_dev( |
138 | specs[type].name, i); | |
f2302d44 SR |
139 | if (di->cookie == NULL) |
140 | return 0; | |
141 | else | |
142 | found = 1; | |
500856eb RJ |
143 | |
144 | /* provide hint if there are more devices in | |
145 | * this group to enumerate */ | |
146 | if ((i + 1) < specs[type].max_dev) | |
147 | *more = 1; | |
148 | ||
149 | break; | |
150 | } | |
151 | } | |
152 | ||
153 | if (found) { | |
154 | di->type = specs[type].type; | |
155 | ||
156 | if (di->cookie != NULL) { | |
4101f687 | 157 | dd = (struct blk_desc *)di->cookie; |
500856eb RJ |
158 | if (dd->type == DEV_TYPE_UNKNOWN) { |
159 | debugf("device instance exists, but is not active.."); | |
160 | found = 0; | |
161 | } else { | |
162 | di->di_stor.block_count = dd->lba; | |
163 | di->di_stor.block_size = dd->blksz; | |
164 | } | |
165 | } | |
166 | ||
167 | } else | |
168 | di->cookie = NULL; | |
169 | ||
170 | return found; | |
171 | } | |
172 | ||
173 | ||
174 | /* | |
4101f687 | 175 | * returns: ENUM_IDE, ENUM_USB etc. based on struct blk_desc |
500856eb | 176 | */ |
4101f687 | 177 | static int dev_stor_type(struct blk_desc *dd) |
500856eb RJ |
178 | { |
179 | int i, j; | |
180 | ||
181 | for (i = ENUM_IDE; i < ENUM_MAX; i++) | |
182 | for (j = 0; j < specs[i].max_dev; j++) | |
db1d9e78 | 183 | if (dd == blk_get_dev(specs[i].name, j)) |
500856eb RJ |
184 | return i; |
185 | ||
186 | return ENUM_MAX; | |
187 | } | |
188 | ||
189 | ||
190 | /* | |
191 | * returns: 0/1 whether cookie points to some device in this group | |
192 | */ | |
193 | static int dev_is_stor(int type, struct device_info *di) | |
194 | { | |
195 | return (dev_stor_type(di->cookie) == type) ? 1 : 0; | |
196 | } | |
197 | ||
198 | ||
199 | static int dev_enum_stor(int type, struct device_info *di) | |
200 | { | |
201 | int found = 0, more = 0; | |
202 | ||
203 | debugf("called, type %d\n", type); | |
204 | ||
205 | /* | |
206 | * Formulae for enumerating storage devices: | |
207 | * 1. if cookie (hint from previous enum call) is NULL we start again | |
208 | * with enumeration, so return the first available device, done. | |
209 | * | |
210 | * 2. if cookie is not NULL, check if it identifies some device in | |
211 | * this group: | |
212 | * | |
213 | * 2a. if cookie is a storage device from our group (IDE, USB etc.), | |
214 | * return next available (if exists) in this group | |
215 | * | |
216 | * 2b. if it isn't device from our group, check if such devices were | |
217 | * ever enumerated before: | |
218 | * - if not, return the first available device from this group | |
219 | * - else return 0 | |
220 | */ | |
221 | ||
222 | if (di->cookie == NULL) { | |
500856eb RJ |
223 | debugf("group%d - enum restart\n", type); |
224 | ||
225 | /* | |
226 | * 1. Enumeration (re-)started: take the first available | |
227 | * device, if exists | |
228 | */ | |
229 | found = dev_stor_get(type, 1, &more, di); | |
230 | specs[type].enum_started = 1; | |
231 | ||
232 | } else if (dev_is_stor(type, di)) { | |
500856eb RJ |
233 | debugf("group%d - enum continued for the next device\n", type); |
234 | ||
235 | if (specs[type].enum_ended) { | |
236 | debugf("group%d - nothing more to enum!\n", type); | |
237 | return 0; | |
238 | } | |
239 | ||
240 | /* 2a. Attempt to take a next available device in the group */ | |
241 | found = dev_stor_get(type, 0, &more, di); | |
242 | ||
243 | } else { | |
500856eb RJ |
244 | if (specs[type].enum_ended) { |
245 | debugf("group %d - already enumerated, skipping\n", type); | |
246 | return 0; | |
247 | } | |
248 | ||
249 | debugf("group%d - first time enum\n", type); | |
250 | ||
251 | if (specs[type].enum_started == 0) { | |
252 | /* | |
253 | * 2b. If enumerating devices in this group did not | |
254 | * happen before, it means the cookie pointed to a | |
255 | * device frome some other group (another storage | |
256 | * group, or network); in this case try to take the | |
257 | * first available device from our group | |
258 | */ | |
259 | specs[type].enum_started = 1; | |
260 | ||
261 | /* | |
262 | * Attempt to take the first device in this group: | |
263 | *'first element' flag is set | |
264 | */ | |
265 | found = dev_stor_get(type, 1, &more, di); | |
266 | ||
267 | } else { | |
268 | errf("group%d - out of order iteration\n", type); | |
269 | found = 0; | |
270 | more = 0; | |
271 | } | |
272 | } | |
273 | ||
274 | /* | |
275 | * If there are no more devices in this group, consider its | |
276 | * enumeration finished | |
277 | */ | |
278 | specs[type].enum_ended = (!more) ? 1 : 0; | |
279 | ||
280 | if (found) | |
281 | debugf("device found, returning cookie 0x%08x\n", | |
e5fbf2a7 | 282 | (u_int32_t)di->cookie); |
500856eb RJ |
283 | else |
284 | debugf("no device found\n"); | |
285 | ||
286 | return found; | |
287 | } | |
288 | ||
289 | void dev_enum_reset(void) | |
290 | { | |
291 | int i; | |
292 | ||
293 | for (i = 0; i < ENUM_MAX; i ++) { | |
294 | specs[i].enum_started = 0; | |
295 | specs[i].enum_ended = 0; | |
296 | } | |
297 | } | |
298 | ||
299 | int dev_enum_storage(struct device_info *di) | |
300 | { | |
301 | int i; | |
302 | ||
303 | /* | |
304 | * check: ide, usb, scsi, mmc | |
305 | */ | |
306 | for (i = ENUM_IDE; i < ENUM_MAX; i ++) { | |
307 | if (dev_enum_stor(i, di)) | |
308 | return 1; | |
309 | } | |
310 | ||
311 | return 0; | |
312 | } | |
313 | ||
4101f687 | 314 | static int dev_stor_is_valid(int type, struct blk_desc *dd) |
500856eb RJ |
315 | { |
316 | int i; | |
317 | ||
318 | for (i = 0; i < specs[type].max_dev; i++) | |
db1d9e78 | 319 | if (dd == blk_get_dev(specs[type].name, i)) |
500856eb RJ |
320 | if (dd->type != DEV_TYPE_UNKNOWN) |
321 | return 1; | |
322 | ||
323 | return 0; | |
324 | } | |
325 | ||
326 | ||
327 | int dev_open_stor(void *cookie) | |
328 | { | |
329 | int type = dev_stor_type(cookie); | |
330 | ||
331 | if (type == ENUM_MAX) | |
332 | return API_ENODEV; | |
333 | ||
4101f687 | 334 | if (dev_stor_is_valid(type, (struct blk_desc *)cookie)) |
500856eb RJ |
335 | return 0; |
336 | ||
337 | return API_ENODEV; | |
338 | } | |
339 | ||
340 | ||
341 | int dev_close_stor(void *cookie) | |
342 | { | |
343 | /* | |
344 | * Not much to do as we actually do not alter storage devices upon | |
345 | * close | |
346 | */ | |
347 | return 0; | |
348 | } | |
349 | ||
350 | ||
500856eb RJ |
351 | lbasize_t dev_read_stor(void *cookie, void *buf, lbasize_t len, lbastart_t start) |
352 | { | |
353 | int type; | |
4101f687 | 354 | struct blk_desc *dd = (struct blk_desc *)cookie; |
500856eb RJ |
355 | |
356 | if ((type = dev_stor_type(dd)) == ENUM_MAX) | |
357 | return 0; | |
358 | ||
359 | if (!dev_stor_is_valid(type, dd)) | |
360 | return 0; | |
361 | ||
362 | if ((dd->block_read) == NULL) { | |
f2302d44 | 363 | debugf("no block_read() for device 0x%08x\n", cookie); |
500856eb RJ |
364 | return 0; |
365 | } | |
366 | ||
7c4213f6 | 367 | return dd->block_read(dd, start, len, buf); |
500856eb | 368 | } |