| Przemyslaw Marczak | 4b19ed6 | 2013-10-23 14:30:45 +0200 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2013 Samsung Electronics |
| 3 | * Lukasz Majewski <l.majewski@samsung.com> |
| 4 | * |
| 5 | * SPDX-License-Identifier: GPL-2.0+ |
| 6 | */ |
| 7 | |
| 8 | #include <common.h> |
| 9 | #include <usb_mass_storage.h> |
| 10 | #include <part.h> |
| 11 | |
| 12 | static int ums_read_sector(struct ums *ums_dev, |
| 13 | ulong start, lbaint_t blkcnt, void *buf) |
| 14 | { |
| 15 | block_dev_desc_t *block_dev = &ums_dev->mmc->block_dev; |
| 16 | lbaint_t blkstart = start + ums_dev->start_sector; |
| 17 | int dev_num = block_dev->dev; |
| 18 | |
| 19 | return block_dev->block_read(dev_num, blkstart, blkcnt, buf); |
| 20 | } |
| 21 | |
| 22 | static int ums_write_sector(struct ums *ums_dev, |
| 23 | ulong start, lbaint_t blkcnt, const void *buf) |
| 24 | { |
| 25 | block_dev_desc_t *block_dev = &ums_dev->mmc->block_dev; |
| 26 | lbaint_t blkstart = start + ums_dev->start_sector; |
| 27 | int dev_num = block_dev->dev; |
| 28 | |
| 29 | return block_dev->block_write(dev_num, blkstart, blkcnt, buf); |
| 30 | } |
| 31 | |
| 32 | static struct ums ums_dev = { |
| 33 | .read_sector = ums_read_sector, |
| 34 | .write_sector = ums_write_sector, |
| 35 | .name = "UMS disk", |
| 36 | }; |
| 37 | |
| 38 | static struct ums *ums_disk_init(struct mmc *mmc) |
| 39 | { |
| 40 | uint64_t mmc_end_sector = mmc->capacity / SECTOR_SIZE; |
| 41 | uint64_t ums_end_sector = UMS_NUM_SECTORS + UMS_START_SECTOR; |
| 42 | |
| 43 | if (!mmc_end_sector) { |
| 44 | error("MMC capacity is not valid"); |
| 45 | return NULL; |
| 46 | } |
| 47 | |
| 48 | ums_dev.mmc = mmc; |
| 49 | |
| 50 | if (ums_end_sector <= mmc_end_sector) { |
| 51 | ums_dev.start_sector = UMS_START_SECTOR; |
| 52 | if (UMS_NUM_SECTORS) |
| 53 | ums_dev.num_sectors = UMS_NUM_SECTORS; |
| 54 | else |
| 55 | ums_dev.num_sectors = mmc_end_sector - UMS_START_SECTOR; |
| 56 | } else { |
| 57 | ums_dev.num_sectors = mmc_end_sector; |
| 58 | puts("UMS: defined bad disk parameters. Using default.\n"); |
| 59 | } |
| 60 | |
| 61 | printf("UMS: disk start sector: %#x, count: %#x\n", |
| 62 | ums_dev.start_sector, ums_dev.num_sectors); |
| 63 | |
| 64 | return &ums_dev; |
| 65 | } |
| 66 | |
| 67 | struct ums *ums_init(unsigned int dev_num) |
| 68 | { |
| 69 | struct mmc *mmc = NULL; |
| 70 | |
| 71 | mmc = find_mmc_device(dev_num); |
| 72 | if (!mmc) |
| 73 | return NULL; |
| 74 | |
| 75 | return ums_disk_init(mmc); |
| 76 | } |