[J-u-boot.git] / api / api_storage.c

/*
 * (C) Copyright 2007-2008 Semihalf
 *
 * Written by: Rafal Jaworowski <[email protected]>
 *
 * SPDX-License-Identifier:	GPL-2.0+
 */

#include <config.h>
#include <common.h>
#include <api_public.h>

#if defined(CONFIG_CMD_USB) && defined(CONFIG_USB_STORAGE)
#include <usb.h>
#endif

#define DEBUG
#undef DEBUG

#ifdef DEBUG
#define debugf(fmt, args...) do { printf("%s(): ", __func__); printf(fmt, ##args); } while (0)
#else
#define debugf(fmt, args...)
#endif

#define errf(fmt, args...) do { printf("ERROR @ %s(): ", __func__); printf(fmt, ##args); } while (0)


#define ENUM_IDE	0
#define ENUM_USB	1
#define ENUM_SCSI	2
#define ENUM_MMC	3
#define ENUM_SATA	4
#define ENUM_MAX	5

struct stor_spec {
	int		max_dev;
	int		enum_started;
	int		enum_ended;
	int		type;		/* "external" type: DT_STOR_{IDE,USB,etc} */
	char		*name;
};

static struct stor_spec specs[ENUM_MAX] = { { 0, 0, 0, 0, "" }, };


void dev_stor_init(void)
{
#if defined(CONFIG_CMD_IDE)
	specs[ENUM_IDE].max_dev = CONFIG_SYS_IDE_MAXDEVICE;
	specs[ENUM_IDE].enum_started = 0;
	specs[ENUM_IDE].enum_ended = 0;
	specs[ENUM_IDE].type = DEV_TYP_STOR | DT_STOR_IDE;
	specs[ENUM_IDE].name = "ide";
#endif
#if defined(CONFIG_CMD_MMC)
	specs[ENUM_MMC].max_dev = CONFIG_SYS_MMC_MAX_DEVICE;
	specs[ENUM_MMC].enum_started = 0;
	specs[ENUM_MMC].enum_ended = 0;
	specs[ENUM_MMC].type = DEV_TYP_STOR | DT_STOR_MMC;
	specs[ENUM_MMC].name = "mmc";
#endif
#if defined(CONFIG_CMD_SATA)
	specs[ENUM_SATA].max_dev = CONFIG_SYS_SATA_MAX_DEVICE;
	specs[ENUM_SATA].enum_started = 0;
	specs[ENUM_SATA].enum_ended = 0;
	specs[ENUM_SATA].type = DEV_TYP_STOR | DT_STOR_SATA;
	specs[ENUM_SATA].name = "sata";
#endif
#if defined(CONFIG_CMD_SCSI)
	specs[ENUM_SCSI].max_dev = CONFIG_SYS_SCSI_MAX_DEVICE;
	specs[ENUM_SCSI].enum_started = 0;
	specs[ENUM_SCSI].enum_ended = 0;
	specs[ENUM_SCSI].type = DEV_TYP_STOR | DT_STOR_SCSI;
	specs[ENUM_SCSI].name = "scsi";
#endif
#if defined(CONFIG_CMD_USB) && defined(CONFIG_USB_STORAGE)
	specs[ENUM_USB].max_dev = USB_MAX_STOR_DEV;
	specs[ENUM_USB].enum_started = 0;
	specs[ENUM_USB].enum_ended = 0;
	specs[ENUM_USB].type = DEV_TYP_STOR | DT_STOR_USB;
	specs[ENUM_USB].name = "usb";
#endif
}

/*
 * Finds next available device in the storage group
 *
 * type:	storage group type - ENUM_IDE, ENUM_SCSI etc.
 *
 * first:	if 1 the first device in the storage group is returned (if
 *              exists), if 0 the next available device is searched
 *
 * more:	returns 0/1 depending if there are more devices in this group
 *		available (for future iterations)
 *
 * returns:	0/1 depending if device found in this iteration
 */
static int dev_stor_get(int type, int first, int *more, struct device_info *di)
{
	int found = 0;
	*more = 0;

	int i;

	block_dev_desc_t *dd;

	if (first) {
		di->cookie = (void *)get_dev(specs[type].name, 0);
		if (di->cookie == NULL)
			return 0;
		else
			found = 1;

	} else {
		for (i = 0; i < specs[type].max_dev; i++)
			if (di->cookie == (void *)get_dev(specs[type].name, i)) {
				/* previous cookie found -- advance to the
				 * next device, if possible */

				if (++i >= specs[type].max_dev) {
					/* out of range, no more to enum */
					di->cookie = NULL;
					break;
				}

				di->cookie = (void *)get_dev(specs[type].name, i);
				if (di->cookie == NULL)
					return 0;
				else
					found = 1;

				/* provide hint if there are more devices in
				 * this group to enumerate */
				if ((i + 1) < specs[type].max_dev)
					*more = 1;

				break;
			}
	}

	if (found) {
		di->type = specs[type].type;

		if (di->cookie != NULL) {
			dd = (block_dev_desc_t *)di->cookie;
			if (dd->type == DEV_TYPE_UNKNOWN) {
				debugf("device instance exists, but is not active..");
				found = 0;
			} else {
				di->di_stor.block_count = dd->lba;
				di->di_stor.block_size = dd->blksz;
			}
		}

	} else
		di->cookie = NULL;

	return found;
}


/*
 * returns:	ENUM_IDE, ENUM_USB etc. based on block_dev_desc_t
 */
static int dev_stor_type(block_dev_desc_t *dd)
{
	int i, j;

	for (i = ENUM_IDE; i < ENUM_MAX; i++)
		for (j = 0; j < specs[i].max_dev; j++)
			if (dd == get_dev(specs[i].name, j))
				return i;

	return ENUM_MAX;
}


/*
 * returns:	0/1 whether cookie points to some device in this group
 */
static int dev_is_stor(int type, struct device_info *di)
{
	return (dev_stor_type(di->cookie) == type) ? 1 : 0;
}


static int dev_enum_stor(int type, struct device_info *di)
{
	int found = 0, more = 0;

	debugf("called, type %d\n", type);

	/*
	 * Formulae for enumerating storage devices:
	 * 1. if cookie (hint from previous enum call) is NULL we start again
	 *    with enumeration, so return the first available device, done.
	 *
	 * 2. if cookie is not NULL, check if it identifies some device in
	 *    this group:
	 *
	 * 2a. if cookie is a storage device from our group (IDE, USB etc.),
	 *     return next available (if exists) in this group
	 *
	 * 2b. if it isn't device from our group, check if such devices were
	 *     ever enumerated before:
	 *     - if not, return the first available device from this group
	 *     - else return 0
	 */

	if (di->cookie == NULL) {

		debugf("group%d - enum restart\n", type);

		/*
		 * 1. Enumeration (re-)started: take the first available
		 * device, if exists
		 */
		found = dev_stor_get(type, 1, &more, di);
		specs[type].enum_started = 1;

	} else if (dev_is_stor(type, di)) {

		debugf("group%d - enum continued for the next device\n", type);

		if (specs[type].enum_ended) {
			debugf("group%d - nothing more to enum!\n", type);
			return 0;
		}

		/* 2a. Attempt to take a next available device in the group */
		found = dev_stor_get(type, 0, &more, di);

	} else {

		if (specs[type].enum_ended) {
			debugf("group %d - already enumerated, skipping\n", type);
			return 0;
		}

		debugf("group%d - first time enum\n", type);

		if (specs[type].enum_started == 0) {
			/*
			 * 2b.  If enumerating devices in this group did not
			 * happen before, it means the cookie pointed to a
			 * device frome some other group (another storage
			 * group, or network); in this case try to take the
			 * first available device from our group
			 */
			specs[type].enum_started = 1;

			/*
			 * Attempt to take the first device in this group:
			 *'first element' flag is set
			 */
			found = dev_stor_get(type, 1, &more, di);

		} else {
			errf("group%d - out of order iteration\n", type);
			found = 0;
			more = 0;
		}
	}

	/*
	 * If there are no more devices in this group, consider its
	 * enumeration finished
	 */
	specs[type].enum_ended = (!more) ? 1 : 0;

	if (found)
		debugf("device found, returning cookie 0x%08x\n",
			(u_int32_t)di->cookie);
	else
		debugf("no device found\n");

	return found;
}

void dev_enum_reset(void)
{
	int i;

	for (i = 0; i < ENUM_MAX; i ++) {
		specs[i].enum_started = 0;
		specs[i].enum_ended = 0;
	}
}

int dev_enum_storage(struct device_info *di)
{
	int i;

	/*
	 * check: ide, usb, scsi, mmc
	 */
	for (i = ENUM_IDE; i < ENUM_MAX; i ++) {
		if (dev_enum_stor(i, di))
			return 1;
	}

	return 0;
}

static int dev_stor_is_valid(int type, block_dev_desc_t *dd)
{
	int i;

	for (i = 0; i < specs[type].max_dev; i++)
		if (dd == get_dev(specs[type].name, i))
			if (dd->type != DEV_TYPE_UNKNOWN)
				return 1;

	return 0;
}


int dev_open_stor(void *cookie)
{
	int type = dev_stor_type(cookie);

	if (type == ENUM_MAX)
		return API_ENODEV;

	if (dev_stor_is_valid(type, (block_dev_desc_t *)cookie))
		return 0;

	return API_ENODEV;
}


int dev_close_stor(void *cookie)
{
	/*
	 * Not much to do as we actually do not alter storage devices upon
	 * close
	 */
	return 0;
}


static int dev_stor_index(block_dev_desc_t *dd)
{
	int i, type;

	type = dev_stor_type(dd);
	for (i = 0; i < specs[type].max_dev; i++)
		if (dd == get_dev(specs[type].name, i))
			return i;

	return (specs[type].max_dev);
}


lbasize_t dev_read_stor(void *cookie, void *buf, lbasize_t len, lbastart_t start)
{
	int type;
	block_dev_desc_t *dd = (block_dev_desc_t *)cookie;

	if ((type = dev_stor_type(dd)) == ENUM_MAX)
		return 0;

	if (!dev_stor_is_valid(type, dd))
		return 0;

	if ((dd->block_read) == NULL) {
		debugf("no block_read() for device 0x%08x\n", cookie);
		return 0;
	}

	return (dd->block_read(dev_stor_index(dd), start, len, buf));
}
Commit	Line	Data
500856eb	1	/*
f2302d44	2	* (C) Copyright 2007-2008 Semihalf
500856eb RJ	3	*
	4	* Written by: Rafal Jaworowski <[email protected]>
	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
f2302d44 SR	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
	44	static struct stor_spec specs[ENUM_MAX] = { { 0, 0, 0, 0, "" }, };
	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
1b769881	70	#if defined(CONFIG_CMD_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
	106	block_dev_desc_t *dd;
	107
	108	if (first) {
	109	di->cookie = (void *)get_dev(specs[type].name, 0);
f2302d44 SR	110	if (di->cookie == NULL)
	111	return 0;
	112	else
	113	found = 1;
500856eb RJ	114
	115	} else {
	116	for (i = 0; i < specs[type].max_dev; i++)
	117	if (di->cookie == (void *)get_dev(specs[type].name, i)) {
	118	/* previous cookie found -- advance to the
	119	* next device, if possible */
	120
	121	if (++i >= specs[type].max_dev) {
	122	/* out of range, no more to enum */
	123	di->cookie = NULL;
	124	break;
	125	}
	126
	127	di->cookie = (void *)get_dev(specs[type].name, i);
f2302d44 SR	128	if (di->cookie == NULL)
	129	return 0;
	130	else
	131	found = 1;
500856eb RJ	132
	133	/* provide hint if there are more devices in
	134	* this group to enumerate */
	135	if ((i + 1) < specs[type].max_dev)
	136	*more = 1;
	137
	138	break;
	139	}
	140	}
	141
	142	if (found) {
	143	di->type = specs[type].type;
	144
	145	if (di->cookie != NULL) {
	146	dd = (block_dev_desc_t *)di->cookie;
	147	if (dd->type == DEV_TYPE_UNKNOWN) {
	148	debugf("device instance exists, but is not active..");
	149	found = 0;
	150	} else {
	151	di->di_stor.block_count = dd->lba;
	152	di->di_stor.block_size = dd->blksz;
	153	}
	154	}
	155
	156	} else
	157	di->cookie = NULL;
	158
	159	return found;
	160	}
	161
	162
	163	/*
	164	* returns: ENUM_IDE, ENUM_USB etc. based on block_dev_desc_t
	165	*/
	166	static int dev_stor_type(block_dev_desc_t *dd)
	167	{
	168	int i, j;
	169
	170	for (i = ENUM_IDE; i < ENUM_MAX; i++)
	171	for (j = 0; j < specs[i].max_dev; j++)
	172	if (dd == get_dev(specs[i].name, j))
	173	return i;
	174
	175	return ENUM_MAX;
	176	}
	177
	178
	179	/*
	180	* returns: 0/1 whether cookie points to some device in this group
	181	*/
	182	static int dev_is_stor(int type, struct device_info *di)
	183	{
	184	return (dev_stor_type(di->cookie) == type) ? 1 : 0;
	185	}
	186
	187
	188	static int dev_enum_stor(int type, struct device_info *di)
	189	{
	190	int found = 0, more = 0;
	191
	192	debugf("called, type %d\n", type);
	193
	194	/*
	195	* Formulae for enumerating storage devices:
196	* 1. if cookie (hint from previous enum call) is NULL we start again
197	* with enumeration, so return the first available device, done.
198	*
199	* 2. if cookie is not NULL, check if it identifies some device in
200	* this group:
201	*
202	* 2a. if cookie is a storage device from our group (IDE, USB etc.),
203	* return next available (if exists) in this group
204	*
205	* 2b. if it isn't device from our group, check if such devices were
206	* ever enumerated before:
207	* - if not, return the first available device from this group
208	* - else return 0
209	*/
210
211	if (di->cookie == NULL) {
212
213	debugf("group%d - enum restart\n", type);
214
215	/*
216	* 1. Enumeration (re-)started: take the first available
217	* device, if exists
218	*/
219	found = dev_stor_get(type, 1, &more, di);
220	specs[type].enum_started = 1;
221
222	} else if (dev_is_stor(type, di)) {
223
224	debugf("group%d - enum continued for the next device\n", type);
225
226	if (specs[type].enum_ended) {
227	debugf("group%d - nothing more to enum!\n", type);
228	return 0;
229	}
230
231	/* 2a. Attempt to take a next available device in the group */
232	found = dev_stor_get(type, 0, &more, di);
233
234	} else {
235
236	if (specs[type].enum_ended) {
237	debugf("group %d - already enumerated, skipping\n", type);
238	return 0;
239	}
240
241	debugf("group%d - first time enum\n", type);
242
243	if (specs[type].enum_started == 0) {
244	/*
245	* 2b. If enumerating devices in this group did not
246	* happen before, it means the cookie pointed to a
247	* device frome some other group (another storage
248	* group, or network); in this case try to take the
249	* first available device from our group
250	*/
251	specs[type].enum_started = 1;
252
253	/*
254	* Attempt to take the first device in this group:
255	*'first element' flag is set
256	*/
257	found = dev_stor_get(type, 1, &more, di);
258
259	} else {
260	errf("group%d - out of order iteration\n", type);
261	found = 0;
262	more = 0;
263	}
264	}
265
266	/*
267	* If there are no more devices in this group, consider its
268	* enumeration finished
269	*/
270	specs[type].enum_ended = (!more) ? 1 : 0;
271
272	if (found)
273	debugf("device found, returning cookie 0x%08x\n",
274	(u_int32_t)di->cookie);
275	else
276	debugf("no device found\n");
277
278	return found;
279	}
280
281	void dev_enum_reset(void)
282	{
283	int i;
284
285	for (i = 0; i < ENUM_MAX; i ++) {
286	specs[i].enum_started = 0;
287	specs[i].enum_ended = 0;
288	}
289	}
290
291	int dev_enum_storage(struct device_info *di)
292	{
293	int i;
294
295	/*
296	* check: ide, usb, scsi, mmc
297	*/
298	for (i = ENUM_IDE; i < ENUM_MAX; i ++) {
299	if (dev_enum_stor(i, di))
300	return 1;
301	}
302
303	return 0;
304	}
305
306	static int dev_stor_is_valid(int type, block_dev_desc_t *dd)
307	{
308	int i;
309
310	for (i = 0; i < specs[type].max_dev; i++)
311	if (dd == get_dev(specs[type].name, i))
312	if (dd->type != DEV_TYPE_UNKNOWN)
313	return 1;
314
315	return 0;
316	}
317
318
319	int dev_open_stor(void *cookie)
320	{
321	int type = dev_stor_type(cookie);
322
323	if (type == ENUM_MAX)
324	return API_ENODEV;
325
326	if (dev_stor_is_valid(type, (block_dev_desc_t *)cookie))
327	return 0;
328
329	return API_ENODEV;
330	}
331
332
333	int dev_close_stor(void *cookie)
334	{
335	/*
336	* Not much to do as we actually do not alter storage devices upon
337	* close
338	*/
339	return 0;
340	}
341
342
343	static int dev_stor_index(block_dev_desc_t *dd)
344	{
345	int i, type;
346
347	type = dev_stor_type(dd);
348	for (i = 0; i < specs[type].max_dev; i++)
349	if (dd == get_dev(specs[type].name, i))
350	return i;
351
352	return (specs[type].max_dev);
353	}
354
355
356	lbasize_t dev_read_stor(void cookie, void buf, lbasize_t len, lbastart_t start)
357	{
358	int type;
359	block_dev_desc_t dd = (block_dev_desc_t )cookie;
360
361	if ((type = dev_stor_type(dd)) == ENUM_MAX)
362	return 0;
363
364	if (!dev_stor_is_valid(type, dd))
365	return 0;
366
367	if ((dd->block_read) == NULL) {
f2302d44	368	debugf("no block_read() for device 0x%08x\n", cookie);
500856eb RJ	369	return 0;
	370	}
	371
	372	return (dd->block_read(dev_stor_index(dd), start, len, buf));
	373	}