2 * (C) Copyright 2007-2008 Semihalf
4 * Written by: Rafal Jaworowski <raj@semihalf.com>
6 * See file CREDITS for list of people who contributed to this
9 * This program is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU General Public License as
11 * published by the Free Software Foundation; either version 2 of
12 * the License, or (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
28 #include <api_public.h>
30 #if defined(CONFIG_CMD_USB) && defined(CONFIG_USB_STORAGE)
38 #define debugf(fmt, args...) do { printf("%s(): ", __func__); printf(fmt, ##args); } while (0)
40 #define debugf(fmt, args...)
43 #define errf(fmt, args...) do { printf("ERROR @ %s(): ", __func__); printf(fmt, ##args); } while (0)
57 int type
; /* "external" type: DT_STOR_{IDE,USB,etc} */
61 static struct stor_spec specs
[ENUM_MAX
] = { { 0, 0, 0, 0, "" }, };
64 void dev_stor_init(void)
66 #if defined(CONFIG_CMD_IDE)
67 specs
[ENUM_IDE
].max_dev
= CONFIG_SYS_IDE_MAXDEVICE
;
68 specs
[ENUM_IDE
].enum_started
= 0;
69 specs
[ENUM_IDE
].enum_ended
= 0;
70 specs
[ENUM_IDE
].type
= DEV_TYP_STOR
| DT_STOR_IDE
;
71 specs
[ENUM_IDE
].name
= "ide";
73 #if defined(CONFIG_CMD_MMC)
74 specs
[ENUM_MMC
].max_dev
= CONFIG_SYS_MMC_MAX_DEVICE
;
75 specs
[ENUM_MMC
].enum_started
= 0;
76 specs
[ENUM_MMC
].enum_ended
= 0;
77 specs
[ENUM_MMC
].type
= DEV_TYP_STOR
| DT_STOR_MMC
;
78 specs
[ENUM_MMC
].name
= "mmc";
80 #if defined(CONFIG_CMD_SATA)
81 specs
[ENUM_SATA
].max_dev
= CONFIG_SYS_SATA_MAX_DEVICE
;
82 specs
[ENUM_SATA
].enum_started
= 0;
83 specs
[ENUM_SATA
].enum_ended
= 0;
84 specs
[ENUM_SATA
].type
= DEV_TYP_STOR
| DT_STOR_SATA
;
85 specs
[ENUM_SATA
].name
= "sata";
87 #if defined(CONFIG_CMD_SCSI)
88 specs
[ENUM_SCSI
].max_dev
= CONFIG_SYS_SCSI_MAX_DEVICE
;
89 specs
[ENUM_SCSI
].enum_started
= 0;
90 specs
[ENUM_SCSI
].enum_ended
= 0;
91 specs
[ENUM_SCSI
].type
= DEV_TYP_STOR
| DT_STOR_SCSI
;
92 specs
[ENUM_SCSI
].name
= "scsi";
94 #if defined(CONFIG_CMD_USB) && defined(CONFIG_USB_STORAGE)
95 specs
[ENUM_USB
].max_dev
= USB_MAX_STOR_DEV
;
96 specs
[ENUM_USB
].enum_started
= 0;
97 specs
[ENUM_USB
].enum_ended
= 0;
98 specs
[ENUM_USB
].type
= DEV_TYP_STOR
| DT_STOR_USB
;
99 specs
[ENUM_USB
].name
= "usb";
104 * Finds next available device in the storage group
106 * type: storage group type - ENUM_IDE, ENUM_SCSI etc.
108 * first: if 1 the first device in the storage group is returned (if
109 * exists), if 0 the next available device is searched
111 * more: returns 0/1 depending if there are more devices in this group
112 * available (for future iterations)
114 * returns: 0/1 depending if device found in this iteration
116 static int dev_stor_get(int type
, int first
, int *more
, struct device_info
*di
)
123 block_dev_desc_t
*dd
;
126 di
->cookie
= (void *)get_dev(specs
[type
].name
, 0);
127 if (di
->cookie
== NULL
)
133 for (i
= 0; i
< specs
[type
].max_dev
; i
++)
134 if (di
->cookie
== (void *)get_dev(specs
[type
].name
, i
)) {
135 /* previous cookie found -- advance to the
136 * next device, if possible */
138 if (++i
>= specs
[type
].max_dev
) {
139 /* out of range, no more to enum */
144 di
->cookie
= (void *)get_dev(specs
[type
].name
, i
);
145 if (di
->cookie
== NULL
)
150 /* provide hint if there are more devices in
151 * this group to enumerate */
152 if ((i
+ 1) < specs
[type
].max_dev
)
160 di
->type
= specs
[type
].type
;
162 if (di
->cookie
!= NULL
) {
163 dd
= (block_dev_desc_t
*)di
->cookie
;
164 if (dd
->type
== DEV_TYPE_UNKNOWN
) {
165 debugf("device instance exists, but is not active..");
168 di
->di_stor
.block_count
= dd
->lba
;
169 di
->di_stor
.block_size
= dd
->blksz
;
181 * returns: ENUM_IDE, ENUM_USB etc. based on block_dev_desc_t
183 static int dev_stor_type(block_dev_desc_t
*dd
)
187 for (i
= ENUM_IDE
; i
< ENUM_MAX
; i
++)
188 for (j
= 0; j
< specs
[i
].max_dev
; j
++)
189 if (dd
== get_dev(specs
[i
].name
, j
))
197 * returns: 0/1 whether cookie points to some device in this group
199 static int dev_is_stor(int type
, struct device_info
*di
)
201 return (dev_stor_type(di
->cookie
) == type
) ? 1 : 0;
205 static int dev_enum_stor(int type
, struct device_info
*di
)
207 int found
= 0, more
= 0;
209 debugf("called, type %d\n", type
);
212 * Formulae for enumerating storage devices:
213 * 1. if cookie (hint from previous enum call) is NULL we start again
214 * with enumeration, so return the first available device, done.
216 * 2. if cookie is not NULL, check if it identifies some device in
219 * 2a. if cookie is a storage device from our group (IDE, USB etc.),
220 * return next available (if exists) in this group
222 * 2b. if it isn't device from our group, check if such devices were
223 * ever enumerated before:
224 * - if not, return the first available device from this group
228 if (di
->cookie
== NULL
) {
230 debugf("group%d - enum restart\n", type
);
233 * 1. Enumeration (re-)started: take the first available
236 found
= dev_stor_get(type
, 1, &more
, di
);
237 specs
[type
].enum_started
= 1;
239 } else if (dev_is_stor(type
, di
)) {
241 debugf("group%d - enum continued for the next device\n", type
);
243 if (specs
[type
].enum_ended
) {
244 debugf("group%d - nothing more to enum!\n", type
);
248 /* 2a. Attempt to take a next available device in the group */
249 found
= dev_stor_get(type
, 0, &more
, di
);
253 if (specs
[type
].enum_ended
) {
254 debugf("group %d - already enumerated, skipping\n", type
);
258 debugf("group%d - first time enum\n", type
);
260 if (specs
[type
].enum_started
== 0) {
262 * 2b. If enumerating devices in this group did not
263 * happen before, it means the cookie pointed to a
264 * device frome some other group (another storage
265 * group, or network); in this case try to take the
266 * first available device from our group
268 specs
[type
].enum_started
= 1;
271 * Attempt to take the first device in this group:
272 *'first element' flag is set
274 found
= dev_stor_get(type
, 1, &more
, di
);
277 errf("group%d - out of order iteration\n", type
);
284 * If there are no more devices in this group, consider its
285 * enumeration finished
287 specs
[type
].enum_ended
= (!more
) ? 1 : 0;
290 debugf("device found, returning cookie 0x%08x\n",
291 (u_int32_t
)di
->cookie
);
293 debugf("no device found\n");
298 void dev_enum_reset(void)
302 for (i
= 0; i
< ENUM_MAX
; i
++) {
303 specs
[i
].enum_started
= 0;
304 specs
[i
].enum_ended
= 0;
308 int dev_enum_storage(struct device_info
*di
)
313 * check: ide, usb, scsi, mmc
315 for (i
= ENUM_IDE
; i
< ENUM_MAX
; i
++) {
316 if (dev_enum_stor(i
, di
))
323 static int dev_stor_is_valid(int type
, block_dev_desc_t
*dd
)
327 for (i
= 0; i
< specs
[type
].max_dev
; i
++)
328 if (dd
== get_dev(specs
[type
].name
, i
))
329 if (dd
->type
!= DEV_TYPE_UNKNOWN
)
336 int dev_open_stor(void *cookie
)
338 int type
= dev_stor_type(cookie
);
340 if (type
== ENUM_MAX
)
343 if (dev_stor_is_valid(type
, (block_dev_desc_t
*)cookie
))
350 int dev_close_stor(void *cookie
)
353 * Not much to do as we actually do not alter storage devices upon
360 static int dev_stor_index(block_dev_desc_t
*dd
)
364 type
= dev_stor_type(dd
);
365 for (i
= 0; i
< specs
[type
].max_dev
; i
++)
366 if (dd
== get_dev(specs
[type
].name
, i
))
369 return (specs
[type
].max_dev
);
373 lbasize_t
dev_read_stor(void *cookie
, void *buf
, lbasize_t len
, lbastart_t start
)
376 block_dev_desc_t
*dd
= (block_dev_desc_t
*)cookie
;
378 if ((type
= dev_stor_type(dd
)) == ENUM_MAX
)
381 if (!dev_stor_is_valid(type
, dd
))
384 if ((dd
->block_read
) == NULL
) {
385 debugf("no block_read() for device 0x%08x\n", cookie
);
389 return (dd
->block_read(dev_stor_index(dd
), start
, len
, buf
));