2 * (C) Copyright 2007-2008 Semihalf
4 * Written by: Rafal Jaworowski <raj@semihalf.com>
6 * SPDX-License-Identifier: GPL-2.0+
11 #include <api_public.h>
13 #if defined(CONFIG_CMD_USB) && defined(CONFIG_USB_STORAGE)
21 #define debugf(fmt, args...) do { printf("%s(): ", __func__); printf(fmt, ##args); } while (0)
23 #define debugf(fmt, args...)
26 #define errf(fmt, args...) do { printf("ERROR @ %s(): ", __func__); printf(fmt, ##args); } while (0)
40 int type
; /* "external" type: DT_STOR_{IDE,USB,etc} */
44 static struct stor_spec specs
[ENUM_MAX
] = { { 0, 0, 0, 0, "" }, };
47 void dev_stor_init(void)
49 #if defined(CONFIG_CMD_IDE)
50 specs
[ENUM_IDE
].max_dev
= CONFIG_SYS_IDE_MAXDEVICE
;
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";
56 #if defined(CONFIG_CMD_MMC)
57 specs
[ENUM_MMC
].max_dev
= CONFIG_SYS_MMC_MAX_DEVICE
;
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";
63 #if defined(CONFIG_CMD_SATA)
64 specs
[ENUM_SATA
].max_dev
= CONFIG_SYS_SATA_MAX_DEVICE
;
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";
70 #if defined(CONFIG_CMD_SCSI)
71 specs
[ENUM_SCSI
].max_dev
= CONFIG_SYS_SCSI_MAX_DEVICE
;
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";
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";
87 * Finds next available device in the storage group
89 * type: storage group type - ENUM_IDE, ENUM_SCSI etc.
91 * first: if 1 the first device in the storage group is returned (if
92 * exists), if 0 the next available device is searched
94 * more: returns 0/1 depending if there are more devices in this group
95 * available (for future iterations)
97 * returns: 0/1 depending if device found in this iteration
99 static int dev_stor_get(int type
, int first
, int *more
, struct device_info
*di
)
106 block_dev_desc_t
*dd
;
109 di
->cookie
= (void *)get_dev(specs
[type
].name
, 0);
110 if (di
->cookie
== NULL
)
115 /* provide hint if there are more devices in
116 * this group to enumerate */
117 if (1 < specs
[type
].max_dev
)
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 */
126 if (++i
>= specs
[type
].max_dev
) {
127 /* out of range, no more to enum */
132 di
->cookie
= (void *)get_dev(specs
[type
].name
, i
);
133 if (di
->cookie
== NULL
)
138 /* provide hint if there are more devices in
139 * this group to enumerate */
140 if ((i
+ 1) < specs
[type
].max_dev
)
148 di
->type
= specs
[type
].type
;
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..");
156 di
->di_stor
.block_count
= dd
->lba
;
157 di
->di_stor
.block_size
= dd
->blksz
;
169 * returns: ENUM_IDE, ENUM_USB etc. based on block_dev_desc_t
171 static int dev_stor_type(block_dev_desc_t
*dd
)
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
))
185 * returns: 0/1 whether cookie points to some device in this group
187 static int dev_is_stor(int type
, struct device_info
*di
)
189 return (dev_stor_type(di
->cookie
) == type
) ? 1 : 0;
193 static int dev_enum_stor(int type
, struct device_info
*di
)
195 int found
= 0, more
= 0;
197 debugf("called, type %d\n", type
);
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.
204 * 2. if cookie is not NULL, check if it identifies some device in
207 * 2a. if cookie is a storage device from our group (IDE, USB etc.),
208 * return next available (if exists) in this group
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
216 if (di
->cookie
== NULL
) {
218 debugf("group%d - enum restart\n", type
);
221 * 1. Enumeration (re-)started: take the first available
224 found
= dev_stor_get(type
, 1, &more
, di
);
225 specs
[type
].enum_started
= 1;
227 } else if (dev_is_stor(type
, di
)) {
229 debugf("group%d - enum continued for the next device\n", type
);
231 if (specs
[type
].enum_ended
) {
232 debugf("group%d - nothing more to enum!\n", type
);
236 /* 2a. Attempt to take a next available device in the group */
237 found
= dev_stor_get(type
, 0, &more
, di
);
241 if (specs
[type
].enum_ended
) {
242 debugf("group %d - already enumerated, skipping\n", type
);
246 debugf("group%d - first time enum\n", type
);
248 if (specs
[type
].enum_started
== 0) {
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
256 specs
[type
].enum_started
= 1;
259 * Attempt to take the first device in this group:
260 *'first element' flag is set
262 found
= dev_stor_get(type
, 1, &more
, di
);
265 errf("group%d - out of order iteration\n", type
);
272 * If there are no more devices in this group, consider its
273 * enumeration finished
275 specs
[type
].enum_ended
= (!more
) ? 1 : 0;
278 debugf("device found, returning cookie 0x%08x\n",
279 (u_int32_t
)di
->cookie
);
281 debugf("no device found\n");
286 void dev_enum_reset(void)
290 for (i
= 0; i
< ENUM_MAX
; i
++) {
291 specs
[i
].enum_started
= 0;
292 specs
[i
].enum_ended
= 0;
296 int dev_enum_storage(struct device_info
*di
)
301 * check: ide, usb, scsi, mmc
303 for (i
= ENUM_IDE
; i
< ENUM_MAX
; i
++) {
304 if (dev_enum_stor(i
, di
))
311 static int dev_stor_is_valid(int type
, block_dev_desc_t
*dd
)
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
)
324 int dev_open_stor(void *cookie
)
326 int type
= dev_stor_type(cookie
);
328 if (type
== ENUM_MAX
)
331 if (dev_stor_is_valid(type
, (block_dev_desc_t
*)cookie
))
338 int dev_close_stor(void *cookie
)
341 * Not much to do as we actually do not alter storage devices upon
348 static int dev_stor_index(block_dev_desc_t
*dd
)
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
))
357 return (specs
[type
].max_dev
);
361 lbasize_t
dev_read_stor(void *cookie
, void *buf
, lbasize_t len
, lbastart_t start
)
364 block_dev_desc_t
*dd
= (block_dev_desc_t
*)cookie
;
366 if ((type
= dev_stor_type(dd
)) == ENUM_MAX
)
369 if (!dev_stor_is_valid(type
, dd
))
372 if ((dd
->block_read
) == NULL
) {
373 debugf("no block_read() for device 0x%08x\n", cookie
);
377 return (dd
->block_read(dev_stor_index(dd
), start
, len
, buf
));