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Revert "Merge patch series "arm: dts: am62-beagleplay: Fix Beagleplay Ethernet""
[thirdparty/u-boot.git] / api / api_storage.c
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83d290c5 1// SPDX-License-Identifier: GPL-2.0+
500856eb 2/*
f2302d44 3 * (C) Copyright 2007-2008 Semihalf
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4 *
5 * Written by: Rafal Jaworowski <raj@semihalf.com>
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6 */
7
8#include <config.h>
d678a59d 9#include <common.h>
500856eb 10#include <api_public.h>
e6f6f9e6 11#include <part.h>
ce30e3ff 12#include <scsi.h>
500856eb 13
3d0ea311
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14#if defined(CONFIG_CMD_USB) && defined(CONFIG_USB_STORAGE)
15#include <usb.h>
16#endif
17
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18#define DEBUG
19#undef DEBUG
20
21#ifdef DEBUG
22#define debugf(fmt, args...) do { printf("%s(): ", __func__); printf(fmt, ##args); } while (0)
23#else
24#define debugf(fmt, args...)
25#endif
26
27#define errf(fmt, args...) do { printf("ERROR @ %s(): ", __func__); printf(fmt, ##args); } while (0)
28
29
30#define ENUM_IDE 0
31#define ENUM_USB 1
32#define ENUM_SCSI 2
33#define ENUM_MMC 3
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34#define ENUM_SATA 4
35#define ENUM_MAX 5
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36
37struct stor_spec {
38 int max_dev;
39 int enum_started;
40 int enum_ended;
e3d7675a 41 int type; /* "external" type: DT_STOR_{IDE,USB,etc} */
f2302d44 42 char *name;
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43};
44
5d81c6df 45static struct stor_spec specs[ENUM_MAX] = { { 0, 0, 0, 0, NULL }, };
500856eb 46
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47void dev_stor_init(void)
48{
fc843a02 49#if defined(CONFIG_IDE)
6d0f6bcf 50 specs[ENUM_IDE].max_dev = CONFIG_SYS_IDE_MAXDEVICE;
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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;
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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
10e40d54 63#if defined(CONFIG_SATA)
6d0f6bcf 64 specs[ENUM_SATA].max_dev = CONFIG_SYS_SATA_MAX_DEVICE;
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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
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70#if defined(CONFIG_CMD_USB) && defined(CONFIG_USB_STORAGE)
71 specs[ENUM_USB].max_dev = USB_MAX_STOR_DEV;
72 specs[ENUM_USB].enum_started = 0;
73 specs[ENUM_USB].enum_ended = 0;
74 specs[ENUM_USB].type = DEV_TYP_STOR | DT_STOR_USB;
75 specs[ENUM_USB].name = "usb";
76#endif
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77}
78
79/*
80 * Finds next available device in the storage group
81 *
82 * type: storage group type - ENUM_IDE, ENUM_SCSI etc.
83 *
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84 * more: returns 0/1 depending if there are more devices in this group
85 * available (for future iterations)
86 *
87 * returns: 0/1 depending if device found in this iteration
88 */
d3e8f630 89static int dev_stor_get(int type, int *more, struct device_info *di)
500856eb 90{
4101f687 91 struct blk_desc *dd;
d3e8f630 92 int found = 0;
8efae021 93 int found_last = 0;
d3e8f630 94 int i = 0;
500856eb 95
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96 /* Wasn't configured for this type, return 0 directly */
97 if (specs[type].name == NULL)
98 return 0;
99
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100 if (di->cookie != NULL) {
101 /* Find the last device we've returned */
102 for (i = 0; i < specs[type].max_dev; i++) {
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103 if (di->cookie ==
104 (void *)blk_get_dev(specs[type].name, i)) {
d3e8f630 105 i += 1;
8efae021 106 found_last = 1;
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107 break;
108 }
d3e8f630 109 }
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110
111 if (!found_last)
112 i = 0;
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113 }
114
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115 for (; i < specs[type].max_dev; i++) {
116 di->cookie = (void *)blk_get_dev(specs[type].name, i);
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117
118 if (di->cookie != NULL) {
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119 found = 1;
120 break;
500856eb 121 }
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122 }
123
124 if (i == specs[type].max_dev)
125 *more = 0;
126 else
127 *more = 1;
500856eb 128
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129 if (found) {
130 di->type = specs[type].type;
131
132 dd = (struct blk_desc *)di->cookie;
133 if (dd->type == DEV_TYPE_UNKNOWN) {
134 debugf("device instance exists, but is not active..");
135 found = 0;
136 } else {
137 di->di_stor.block_count = dd->lba;
138 di->di_stor.block_size = dd->blksz;
139 }
140 } else {
500856eb 141 di->cookie = NULL;
d3e8f630 142 }
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143
144 return found;
145}
146
147
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148/* returns: ENUM_IDE, ENUM_USB etc. based on struct blk_desc */
149
4101f687 150static int dev_stor_type(struct blk_desc *dd)
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151{
152 int i, j;
153
154 for (i = ENUM_IDE; i < ENUM_MAX; i++)
155 for (j = 0; j < specs[i].max_dev; j++)
db1d9e78 156 if (dd == blk_get_dev(specs[i].name, j))
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157 return i;
158
159 return ENUM_MAX;
160}
161
162
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163/* returns: 0/1 whether cookie points to some device in this group */
164
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165static int dev_is_stor(int type, struct device_info *di)
166{
167 return (dev_stor_type(di->cookie) == type) ? 1 : 0;
168}
169
170
171static int dev_enum_stor(int type, struct device_info *di)
172{
173 int found = 0, more = 0;
174
175 debugf("called, type %d\n", type);
176
177 /*
178 * Formulae for enumerating storage devices:
179 * 1. if cookie (hint from previous enum call) is NULL we start again
180 * with enumeration, so return the first available device, done.
181 *
182 * 2. if cookie is not NULL, check if it identifies some device in
183 * this group:
184 *
185 * 2a. if cookie is a storage device from our group (IDE, USB etc.),
186 * return next available (if exists) in this group
187 *
188 * 2b. if it isn't device from our group, check if such devices were
189 * ever enumerated before:
190 * - if not, return the first available device from this group
191 * - else return 0
192 */
193
194 if (di->cookie == NULL) {
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195 debugf("group%d - enum restart\n", type);
196
197 /*
198 * 1. Enumeration (re-)started: take the first available
199 * device, if exists
200 */
d3e8f630 201 found = dev_stor_get(type, &more, di);
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202 specs[type].enum_started = 1;
203
204 } else if (dev_is_stor(type, di)) {
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205 debugf("group%d - enum continued for the next device\n", type);
206
207 if (specs[type].enum_ended) {
208 debugf("group%d - nothing more to enum!\n", type);
209 return 0;
210 }
211
212 /* 2a. Attempt to take a next available device in the group */
d3e8f630 213 found = dev_stor_get(type, &more, di);
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214
215 } else {
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216 if (specs[type].enum_ended) {
217 debugf("group %d - already enumerated, skipping\n", type);
218 return 0;
219 }
220
221 debugf("group%d - first time enum\n", type);
222
223 if (specs[type].enum_started == 0) {
224 /*
225 * 2b. If enumerating devices in this group did not
226 * happen before, it means the cookie pointed to a
83f9ecbe 227 * device from some other group (another storage
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228 * group, or network); in this case try to take the
229 * first available device from our group
230 */
231 specs[type].enum_started = 1;
232
233 /*
234 * Attempt to take the first device in this group:
235 *'first element' flag is set
236 */
d3e8f630 237 found = dev_stor_get(type, &more, di);
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238
239 } else {
240 errf("group%d - out of order iteration\n", type);
241 found = 0;
242 more = 0;
243 }
244 }
245
246 /*
247 * If there are no more devices in this group, consider its
248 * enumeration finished
249 */
250 specs[type].enum_ended = (!more) ? 1 : 0;
251
252 if (found)
253 debugf("device found, returning cookie 0x%08x\n",
e5fbf2a7 254 (u_int32_t)di->cookie);
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255 else
256 debugf("no device found\n");
257
258 return found;
259}
260
261void dev_enum_reset(void)
262{
263 int i;
264
265 for (i = 0; i < ENUM_MAX; i ++) {
266 specs[i].enum_started = 0;
267 specs[i].enum_ended = 0;
268 }
269}
270
271int dev_enum_storage(struct device_info *di)
272{
273 int i;
274
c9db75a0 275 /* check: ide, usb, scsi, mmc */
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276 for (i = ENUM_IDE; i < ENUM_MAX; i ++) {
277 if (dev_enum_stor(i, di))
278 return 1;
279 }
280
281 return 0;
282}
283
4101f687 284static int dev_stor_is_valid(int type, struct blk_desc *dd)
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285{
286 int i;
287
288 for (i = 0; i < specs[type].max_dev; i++)
db1d9e78 289 if (dd == blk_get_dev(specs[type].name, i))
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290 if (dd->type != DEV_TYPE_UNKNOWN)
291 return 1;
292
293 return 0;
294}
295
296
297int dev_open_stor(void *cookie)
298{
299 int type = dev_stor_type(cookie);
300
301 if (type == ENUM_MAX)
302 return API_ENODEV;
303
4101f687 304 if (dev_stor_is_valid(type, (struct blk_desc *)cookie))
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305 return 0;
306
307 return API_ENODEV;
308}
309
310
311int dev_close_stor(void *cookie)
312{
313 /*
314 * Not much to do as we actually do not alter storage devices upon
315 * close
316 */
317 return 0;
318}
319
320
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321lbasize_t dev_read_stor(void *cookie, void *buf, lbasize_t len, lbastart_t start)
322{
323 int type;
4101f687 324 struct blk_desc *dd = (struct blk_desc *)cookie;
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325
326 if ((type = dev_stor_type(dd)) == ENUM_MAX)
327 return 0;
328
329 if (!dev_stor_is_valid(type, dd))
330 return 0;
331
f2288c5a 332#ifdef CONFIG_BLK
333 return blk_dread(dd, start, len, buf);
334#else
500856eb 335 if ((dd->block_read) == NULL) {
f2302d44 336 debugf("no block_read() for device 0x%08x\n", cookie);
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337 return 0;
338 }
339
7c4213f6 340 return dd->block_read(dd, start, len, buf);
f2288c5a 341#endif /* defined(CONFIG_BLK) */
500856eb 342}
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343
344
345lbasize_t dev_write_stor(void *cookie, void *buf, lbasize_t len, lbastart_t start)
346{
347 struct blk_desc *dd = (struct blk_desc *)cookie;
348 int type = dev_stor_type(dd);
349
350 if (type == ENUM_MAX)
351 return 0;
352
353 if (!dev_stor_is_valid(type, dd))
354 return 0;
355
356#ifdef CONFIG_BLK
357 return blk_dwrite(dd, start, len, buf);
358#else
359 if (dd->block_write == NULL) {
360 debugf("no block_write() for device 0x%08x\n", cookie);
361 return 0;
362 }
363
364 return dd->block_write(dd, start, len, buf);
365#endif /* defined(CONFIG_BLK) */
366}