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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; | |
e3d7675a | 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 | 45 | |
6d7a5707 EV |
46 | #ifndef CONFIG_SYS_MMC_MAX_DEVICE |
47 | #define CONFIG_SYS_MMC_MAX_DEVICE 1 | |
48 | #endif | |
500856eb RJ |
49 | |
50 | void dev_stor_init(void) | |
51 | { | |
fc843a02 | 52 | #if defined(CONFIG_IDE) |
6d0f6bcf | 53 | specs[ENUM_IDE].max_dev = CONFIG_SYS_IDE_MAXDEVICE; |
500856eb RJ |
54 | specs[ENUM_IDE].enum_started = 0; |
55 | specs[ENUM_IDE].enum_ended = 0; | |
56 | specs[ENUM_IDE].type = DEV_TYP_STOR | DT_STOR_IDE; | |
57 | specs[ENUM_IDE].name = "ide"; | |
58 | #endif | |
f2302d44 | 59 | #if defined(CONFIG_CMD_MMC) |
6d0f6bcf | 60 | specs[ENUM_MMC].max_dev = CONFIG_SYS_MMC_MAX_DEVICE; |
f2302d44 SR |
61 | specs[ENUM_MMC].enum_started = 0; |
62 | specs[ENUM_MMC].enum_ended = 0; | |
63 | specs[ENUM_MMC].type = DEV_TYP_STOR | DT_STOR_MMC; | |
64 | specs[ENUM_MMC].name = "mmc"; | |
65 | #endif | |
10e40d54 | 66 | #if defined(CONFIG_SATA) |
6d0f6bcf | 67 | specs[ENUM_SATA].max_dev = CONFIG_SYS_SATA_MAX_DEVICE; |
f2302d44 SR |
68 | specs[ENUM_SATA].enum_started = 0; |
69 | specs[ENUM_SATA].enum_ended = 0; | |
70 | specs[ENUM_SATA].type = DEV_TYP_STOR | DT_STOR_SATA; | |
71 | specs[ENUM_SATA].name = "sata"; | |
500856eb | 72 | #endif |
c649e3c9 | 73 | #if defined(CONFIG_SCSI) |
6d0f6bcf | 74 | specs[ENUM_SCSI].max_dev = CONFIG_SYS_SCSI_MAX_DEVICE; |
500856eb RJ |
75 | specs[ENUM_SCSI].enum_started = 0; |
76 | specs[ENUM_SCSI].enum_ended = 0; | |
77 | specs[ENUM_SCSI].type = DEV_TYP_STOR | DT_STOR_SCSI; | |
78 | specs[ENUM_SCSI].name = "scsi"; | |
79 | #endif | |
f2302d44 SR |
80 | #if defined(CONFIG_CMD_USB) && defined(CONFIG_USB_STORAGE) |
81 | specs[ENUM_USB].max_dev = USB_MAX_STOR_DEV; | |
82 | specs[ENUM_USB].enum_started = 0; | |
83 | specs[ENUM_USB].enum_ended = 0; | |
84 | specs[ENUM_USB].type = DEV_TYP_STOR | DT_STOR_USB; | |
85 | specs[ENUM_USB].name = "usb"; | |
86 | #endif | |
500856eb RJ |
87 | } |
88 | ||
89 | /* | |
90 | * Finds next available device in the storage group | |
91 | * | |
92 | * type: storage group type - ENUM_IDE, ENUM_SCSI etc. | |
93 | * | |
500856eb RJ |
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 | */ | |
d3e8f630 | 99 | static int dev_stor_get(int type, int *more, struct device_info *di) |
500856eb | 100 | { |
4101f687 | 101 | struct blk_desc *dd; |
d3e8f630 EV |
102 | int found = 0; |
103 | int i = 0; | |
500856eb | 104 | |
5d81c6df EV |
105 | /* Wasn't configured for this type, return 0 directly */ |
106 | if (specs[type].name == NULL) | |
107 | return 0; | |
108 | ||
d3e8f630 EV |
109 | if (di->cookie != NULL) { |
110 | /* Find the last device we've returned */ | |
111 | for (i = 0; i < specs[type].max_dev; i++) { | |
db1d9e78 SG |
112 | if (di->cookie == |
113 | (void *)blk_get_dev(specs[type].name, i)) { | |
d3e8f630 | 114 | i += 1; |
500856eb RJ |
115 | break; |
116 | } | |
d3e8f630 | 117 | } |
500856eb RJ |
118 | } |
119 | ||
d3e8f630 EV |
120 | for (; i < specs[type].max_dev; i++) { |
121 | di->cookie = (void *)blk_get_dev(specs[type].name, i); | |
500856eb RJ |
122 | |
123 | if (di->cookie != NULL) { | |
d3e8f630 EV |
124 | found = 1; |
125 | break; | |
500856eb | 126 | } |
d3e8f630 EV |
127 | } |
128 | ||
129 | if (i == specs[type].max_dev) | |
130 | *more = 0; | |
131 | else | |
132 | *more = 1; | |
500856eb | 133 | |
d3e8f630 EV |
134 | if (found) { |
135 | di->type = specs[type].type; | |
136 | ||
137 | dd = (struct blk_desc *)di->cookie; | |
138 | if (dd->type == DEV_TYPE_UNKNOWN) { | |
139 | debugf("device instance exists, but is not active.."); | |
140 | found = 0; | |
141 | } else { | |
142 | di->di_stor.block_count = dd->lba; | |
143 | di->di_stor.block_size = dd->blksz; | |
144 | } | |
145 | } else { | |
500856eb | 146 | di->cookie = NULL; |
d3e8f630 | 147 | } |
500856eb RJ |
148 | |
149 | return found; | |
150 | } | |
151 | ||
152 | ||
c9db75a0 WF |
153 | /* returns: ENUM_IDE, ENUM_USB etc. based on struct blk_desc */ |
154 | ||
4101f687 | 155 | static int dev_stor_type(struct blk_desc *dd) |
500856eb RJ |
156 | { |
157 | int i, j; | |
158 | ||
159 | for (i = ENUM_IDE; i < ENUM_MAX; i++) | |
160 | for (j = 0; j < specs[i].max_dev; j++) | |
db1d9e78 | 161 | if (dd == blk_get_dev(specs[i].name, j)) |
500856eb RJ |
162 | return i; |
163 | ||
164 | return ENUM_MAX; | |
165 | } | |
166 | ||
167 | ||
c9db75a0 WF |
168 | /* returns: 0/1 whether cookie points to some device in this group */ |
169 | ||
500856eb RJ |
170 | static int dev_is_stor(int type, struct device_info *di) |
171 | { | |
172 | return (dev_stor_type(di->cookie) == type) ? 1 : 0; | |
173 | } | |
174 | ||
175 | ||
176 | static int dev_enum_stor(int type, struct device_info *di) | |
177 | { | |
178 | int found = 0, more = 0; | |
179 | ||
180 | debugf("called, type %d\n", type); | |
181 | ||
182 | /* | |
183 | * Formulae for enumerating storage devices: | |
184 | * 1. if cookie (hint from previous enum call) is NULL we start again | |
185 | * with enumeration, so return the first available device, done. | |
186 | * | |
187 | * 2. if cookie is not NULL, check if it identifies some device in | |
188 | * this group: | |
189 | * | |
190 | * 2a. if cookie is a storage device from our group (IDE, USB etc.), | |
191 | * return next available (if exists) in this group | |
192 | * | |
193 | * 2b. if it isn't device from our group, check if such devices were | |
194 | * ever enumerated before: | |
195 | * - if not, return the first available device from this group | |
196 | * - else return 0 | |
197 | */ | |
198 | ||
199 | if (di->cookie == NULL) { | |
500856eb RJ |
200 | debugf("group%d - enum restart\n", type); |
201 | ||
202 | /* | |
203 | * 1. Enumeration (re-)started: take the first available | |
204 | * device, if exists | |
205 | */ | |
d3e8f630 | 206 | found = dev_stor_get(type, &more, di); |
500856eb RJ |
207 | specs[type].enum_started = 1; |
208 | ||
209 | } else if (dev_is_stor(type, di)) { | |
500856eb RJ |
210 | debugf("group%d - enum continued for the next device\n", type); |
211 | ||
212 | if (specs[type].enum_ended) { | |
213 | debugf("group%d - nothing more to enum!\n", type); | |
214 | return 0; | |
215 | } | |
216 | ||
217 | /* 2a. Attempt to take a next available device in the group */ | |
d3e8f630 | 218 | found = dev_stor_get(type, &more, di); |
500856eb RJ |
219 | |
220 | } else { | |
500856eb RJ |
221 | if (specs[type].enum_ended) { |
222 | debugf("group %d - already enumerated, skipping\n", type); | |
223 | return 0; | |
224 | } | |
225 | ||
226 | debugf("group%d - first time enum\n", type); | |
227 | ||
228 | if (specs[type].enum_started == 0) { | |
229 | /* | |
230 | * 2b. If enumerating devices in this group did not | |
231 | * happen before, it means the cookie pointed to a | |
83f9ecbe | 232 | * device from some other group (another storage |
500856eb RJ |
233 | * group, or network); in this case try to take the |
234 | * first available device from our group | |
235 | */ | |
236 | specs[type].enum_started = 1; | |
237 | ||
238 | /* | |
239 | * Attempt to take the first device in this group: | |
240 | *'first element' flag is set | |
241 | */ | |
d3e8f630 | 242 | found = dev_stor_get(type, &more, di); |
500856eb RJ |
243 | |
244 | } else { | |
245 | errf("group%d - out of order iteration\n", type); | |
246 | found = 0; | |
247 | more = 0; | |
248 | } | |
249 | } | |
250 | ||
251 | /* | |
252 | * If there are no more devices in this group, consider its | |
253 | * enumeration finished | |
254 | */ | |
255 | specs[type].enum_ended = (!more) ? 1 : 0; | |
256 | ||
257 | if (found) | |
258 | debugf("device found, returning cookie 0x%08x\n", | |
e5fbf2a7 | 259 | (u_int32_t)di->cookie); |
500856eb RJ |
260 | else |
261 | debugf("no device found\n"); | |
262 | ||
263 | return found; | |
264 | } | |
265 | ||
266 | void dev_enum_reset(void) | |
267 | { | |
268 | int i; | |
269 | ||
270 | for (i = 0; i < ENUM_MAX; i ++) { | |
271 | specs[i].enum_started = 0; | |
272 | specs[i].enum_ended = 0; | |
273 | } | |
274 | } | |
275 | ||
276 | int dev_enum_storage(struct device_info *di) | |
277 | { | |
278 | int i; | |
279 | ||
c9db75a0 | 280 | /* check: ide, usb, scsi, mmc */ |
500856eb RJ |
281 | for (i = ENUM_IDE; i < ENUM_MAX; i ++) { |
282 | if (dev_enum_stor(i, di)) | |
283 | return 1; | |
284 | } | |
285 | ||
286 | return 0; | |
287 | } | |
288 | ||
4101f687 | 289 | static int dev_stor_is_valid(int type, struct blk_desc *dd) |
500856eb RJ |
290 | { |
291 | int i; | |
292 | ||
293 | for (i = 0; i < specs[type].max_dev; i++) | |
db1d9e78 | 294 | if (dd == blk_get_dev(specs[type].name, i)) |
500856eb RJ |
295 | if (dd->type != DEV_TYPE_UNKNOWN) |
296 | return 1; | |
297 | ||
298 | return 0; | |
299 | } | |
300 | ||
301 | ||
302 | int dev_open_stor(void *cookie) | |
303 | { | |
304 | int type = dev_stor_type(cookie); | |
305 | ||
306 | if (type == ENUM_MAX) | |
307 | return API_ENODEV; | |
308 | ||
4101f687 | 309 | if (dev_stor_is_valid(type, (struct blk_desc *)cookie)) |
500856eb RJ |
310 | return 0; |
311 | ||
312 | return API_ENODEV; | |
313 | } | |
314 | ||
315 | ||
316 | int dev_close_stor(void *cookie) | |
317 | { | |
318 | /* | |
319 | * Not much to do as we actually do not alter storage devices upon | |
320 | * close | |
321 | */ | |
322 | return 0; | |
323 | } | |
324 | ||
325 | ||
500856eb RJ |
326 | lbasize_t dev_read_stor(void *cookie, void *buf, lbasize_t len, lbastart_t start) |
327 | { | |
328 | int type; | |
4101f687 | 329 | struct blk_desc *dd = (struct blk_desc *)cookie; |
500856eb RJ |
330 | |
331 | if ((type = dev_stor_type(dd)) == ENUM_MAX) | |
332 | return 0; | |
333 | ||
334 | if (!dev_stor_is_valid(type, dd)) | |
335 | return 0; | |
336 | ||
f2288c5a | 337 | #ifdef CONFIG_BLK |
338 | return blk_dread(dd, start, len, buf); | |
339 | #else | |
500856eb | 340 | if ((dd->block_read) == NULL) { |
f2302d44 | 341 | debugf("no block_read() for device 0x%08x\n", cookie); |
500856eb RJ |
342 | return 0; |
343 | } | |
344 | ||
7c4213f6 | 345 | return dd->block_read(dd, start, len, buf); |
f2288c5a | 346 | #endif /* defined(CONFIG_BLK) */ |
500856eb | 347 | } |