2 * Copyright (C) 2016 Google, Inc
3 * Written by Simon Glass <sjg@chromium.org>
5 * SPDX-License-Identifier: GPL-2.0+
11 #include <dm/device-internal.h>
14 static const char *if_typename_str[IF_TYPE_COUNT] = {
15 [IF_TYPE_IDE] = "ide",
16 [IF_TYPE_SCSI] = "scsi",
17 [IF_TYPE_ATAPI] = "atapi",
18 [IF_TYPE_USB] = "usb",
19 [IF_TYPE_DOC] = "doc",
20 [IF_TYPE_MMC] = "mmc",
22 [IF_TYPE_SATA] = "sata",
23 [IF_TYPE_HOST] = "host",
24 [IF_TYPE_SYSTEMACE] = "ace",
27 static enum uclass_id if_type_uclass_id[IF_TYPE_COUNT] = {
28 [IF_TYPE_IDE] = UCLASS_INVALID,
29 [IF_TYPE_SCSI] = UCLASS_INVALID,
30 [IF_TYPE_ATAPI] = UCLASS_INVALID,
31 [IF_TYPE_USB] = UCLASS_MASS_STORAGE,
32 [IF_TYPE_DOC] = UCLASS_INVALID,
33 [IF_TYPE_MMC] = UCLASS_MMC,
34 [IF_TYPE_SD] = UCLASS_INVALID,
35 [IF_TYPE_SATA] = UCLASS_AHCI,
36 [IF_TYPE_HOST] = UCLASS_ROOT,
37 [IF_TYPE_SYSTEMACE] = UCLASS_INVALID,
40 static enum if_type if_typename_to_iftype(const char *if_typename)
44 for (i = 0; i < IF_TYPE_COUNT; i++) {
45 if (if_typename_str[i] &&
46 !strcmp(if_typename, if_typename_str[i]))
50 return IF_TYPE_UNKNOWN;
53 static enum uclass_id if_type_to_uclass_id(enum if_type if_type)
55 return if_type_uclass_id[if_type];
58 struct blk_desc *blk_get_devnum_by_type(enum if_type if_type, int devnum)
60 struct blk_desc *desc;
64 ret = blk_get_device(if_type, devnum, &dev);
67 desc = dev_get_uclass_platdata(dev);
73 * This function is complicated with driver model. We look up the interface
74 * name in a local table. This gives us an interface type which we can match
75 * against the uclass of the block device's parent.
77 struct blk_desc *blk_get_devnum_by_typename(const char *if_typename, int devnum)
79 enum uclass_id uclass_id;
85 if_type = if_typename_to_iftype(if_typename);
86 if (if_type == IF_TYPE_UNKNOWN) {
87 debug("%s: Unknown interface type '%s'\n", __func__,
91 uclass_id = if_type_to_uclass_id(if_type);
92 if (uclass_id == UCLASS_INVALID) {
93 debug("%s: Unknown uclass for interface type'\n",
94 if_typename_str[if_type]);
98 ret = uclass_get(UCLASS_BLK, &uc);
101 uclass_foreach_dev(dev, uc) {
102 struct blk_desc *desc = dev_get_uclass_platdata(dev);
104 debug("%s: if_type=%d, devnum=%d: %s, %d, %d\n", __func__,
105 if_type, devnum, dev->name, desc->if_type, desc->devnum);
106 if (desc->devnum != devnum)
109 /* Find out the parent device uclass */
110 if (device_get_uclass_id(dev->parent) != uclass_id) {
111 debug("%s: parent uclass %d, this dev %d\n", __func__,
112 device_get_uclass_id(dev->parent), uclass_id);
116 if (device_probe(dev))
119 debug("%s: Device desc %p\n", __func__, desc);
122 debug("%s: No device found\n", __func__);
128 * get_desc() - Get the block device descriptor for the given device number
130 * @if_type: Interface type
131 * @devnum: Device number (0 = first)
132 * @descp: Returns block device descriptor on success
133 * @return 0 on success, -ENODEV if there is no such device and no device
134 * with a higher device number, -ENOENT if there is no such device but there
135 * is one with a higher number, or other -ve on other error.
137 static int get_desc(enum if_type if_type, int devnum, struct blk_desc **descp)
139 bool found_more = false;
145 ret = uclass_get(UCLASS_BLK, &uc);
148 uclass_foreach_dev(dev, uc) {
149 struct blk_desc *desc = dev_get_uclass_platdata(dev);
151 debug("%s: if_type=%d, devnum=%d: %s, %d, %d\n", __func__,
152 if_type, devnum, dev->name, desc->if_type, desc->devnum);
153 if (desc->if_type == if_type) {
154 if (desc->devnum == devnum) {
155 ret = device_probe(dev);
159 } else if (desc->devnum > devnum) {
165 return found_more ? -ENOENT : -ENODEV;
168 int blk_select_hwpart_devnum(enum if_type if_type, int devnum, int hwpart)
173 ret = blk_get_device(if_type, devnum, &dev);
177 return blk_select_hwpart(dev, hwpart);
180 int blk_list_part(enum if_type if_type)
182 struct blk_desc *desc;
186 for (ok = 0, devnum = 0;; ++devnum) {
187 ret = get_desc(if_type, devnum, &desc);
192 if (desc->part_type != PART_TYPE_UNKNOWN) {
205 int blk_print_part_devnum(enum if_type if_type, int devnum)
207 struct blk_desc *desc;
210 ret = get_desc(if_type, devnum, &desc);
213 if (desc->type == DEV_TYPE_UNKNOWN)
220 void blk_list_devices(enum if_type if_type)
222 struct blk_desc *desc;
227 ret = get_desc(if_type, i, &desc);
232 if (desc->type == DEV_TYPE_UNKNOWN)
233 continue; /* list only known devices */
234 printf("Device %d: ", i);
239 int blk_print_device_num(enum if_type if_type, int devnum)
241 struct blk_desc *desc;
244 ret = get_desc(if_type, devnum, &desc);
247 printf("\nIDE device %d: ", devnum);
253 int blk_show_device(enum if_type if_type, int devnum)
255 struct blk_desc *desc;
258 printf("\nDevice %d: ", devnum);
259 ret = get_desc(if_type, devnum, &desc);
260 if (ret == -ENODEV || ret == -ENOENT) {
261 printf("unknown device\n");
268 if (desc->type == DEV_TYPE_UNKNOWN)
274 ulong blk_read_devnum(enum if_type if_type, int devnum, lbaint_t start,
275 lbaint_t blkcnt, void *buffer)
277 struct blk_desc *desc;
281 ret = get_desc(if_type, devnum, &desc);
284 n = blk_dread(desc, start, blkcnt, buffer);
288 /* flush cache after read */
289 flush_cache((ulong)buffer, blkcnt * desc->blksz);
294 ulong blk_write_devnum(enum if_type if_type, int devnum, lbaint_t start,
295 lbaint_t blkcnt, const void *buffer)
297 struct blk_desc *desc;
300 ret = get_desc(if_type, devnum, &desc);
303 return blk_dwrite(desc, start, blkcnt, buffer);
306 int blk_select_hwpart(struct udevice *dev, int hwpart)
308 const struct blk_ops *ops = blk_get_ops(dev);
312 if (!ops->select_hwpart)
315 return ops->select_hwpart(dev, hwpart);
318 int blk_dselect_hwpart(struct blk_desc *desc, int hwpart)
320 return blk_select_hwpart(desc->bdev, hwpart);
323 int blk_first_device(int if_type, struct udevice **devp)
325 struct blk_desc *desc;
328 ret = uclass_first_device(UCLASS_BLK, devp);
334 desc = dev_get_uclass_platdata(*devp);
335 if (desc->if_type == if_type)
337 ret = uclass_next_device(devp);
345 int blk_next_device(struct udevice **devp)
347 struct blk_desc *desc;
350 desc = dev_get_uclass_platdata(*devp);
351 if_type = desc->if_type;
353 ret = uclass_next_device(devp);
358 desc = dev_get_uclass_platdata(*devp);
359 if (desc->if_type == if_type)
364 int blk_get_device(int if_type, int devnum, struct udevice **devp)
370 ret = uclass_get(UCLASS_BLK, &uc);
373 uclass_foreach_dev(dev, uc) {
374 struct blk_desc *desc = dev_get_uclass_platdata(dev);
376 debug("%s: if_type=%d, devnum=%d: %s, %d, %d\n", __func__,
377 if_type, devnum, dev->name, desc->if_type, desc->devnum);
378 if (desc->if_type == if_type && desc->devnum == devnum) {
380 return device_probe(dev);
387 unsigned long blk_dread(struct blk_desc *block_dev, lbaint_t start,
388 lbaint_t blkcnt, void *buffer)
390 struct udevice *dev = block_dev->bdev;
391 const struct blk_ops *ops = blk_get_ops(dev);
397 if (blkcache_read(block_dev->if_type, block_dev->devnum,
398 start, blkcnt, block_dev->blksz, buffer))
400 blks_read = ops->read(dev, start, blkcnt, buffer);
401 if (blks_read == blkcnt)
402 blkcache_fill(block_dev->if_type, block_dev->devnum,
403 start, blkcnt, block_dev->blksz, buffer);
408 unsigned long blk_dwrite(struct blk_desc *block_dev, lbaint_t start,
409 lbaint_t blkcnt, const void *buffer)
411 struct udevice *dev = block_dev->bdev;
412 const struct blk_ops *ops = blk_get_ops(dev);
417 blkcache_invalidate(block_dev->if_type, block_dev->devnum);
418 return ops->write(dev, start, blkcnt, buffer);
421 unsigned long blk_derase(struct blk_desc *block_dev, lbaint_t start,
424 struct udevice *dev = block_dev->bdev;
425 const struct blk_ops *ops = blk_get_ops(dev);
430 blkcache_invalidate(block_dev->if_type, block_dev->devnum);
431 return ops->erase(dev, start, blkcnt);
434 int blk_prepare_device(struct udevice *dev)
436 struct blk_desc *desc = dev_get_uclass_platdata(dev);
443 int blk_find_max_devnum(enum if_type if_type)
446 int max_devnum = -ENODEV;
450 ret = uclass_get(UCLASS_BLK, &uc);
453 uclass_foreach_dev(dev, uc) {
454 struct blk_desc *desc = dev_get_uclass_platdata(dev);
456 if (desc->if_type == if_type && desc->devnum > max_devnum)
457 max_devnum = desc->devnum;
463 int blk_create_device(struct udevice *parent, const char *drv_name,
464 const char *name, int if_type, int devnum, int blksz,
465 lbaint_t size, struct udevice **devp)
467 struct blk_desc *desc;
472 ret = blk_find_max_devnum(if_type);
480 ret = device_bind_driver(parent, drv_name, name, &dev);
483 desc = dev_get_uclass_platdata(dev);
484 desc->if_type = if_type;
486 desc->lba = size / blksz;
487 desc->part_type = PART_TYPE_UNKNOWN;
489 desc->devnum = devnum;
495 int blk_create_devicef(struct udevice *parent, const char *drv_name,
496 const char *name, int if_type, int devnum, int blksz,
497 lbaint_t size, struct udevice **devp)
499 char dev_name[30], *str;
502 snprintf(dev_name, sizeof(dev_name), "%s.%s", parent->name, name);
503 str = strdup(dev_name);
507 ret = blk_create_device(parent, drv_name, str, if_type, devnum,
513 device_set_name_alloced(*devp);
518 int blk_unbind_all(int if_type)
521 struct udevice *dev, *next;
524 ret = uclass_get(UCLASS_BLK, &uc);
527 uclass_foreach_dev_safe(dev, next, uc) {
528 struct blk_desc *desc = dev_get_uclass_platdata(dev);
530 if (desc->if_type == if_type) {
531 ret = device_remove(dev);
534 ret = device_unbind(dev);
543 UCLASS_DRIVER(blk) = {
546 .per_device_platdata_auto_alloc_size = sizeof(struct blk_desc),