| Patrick Delaunay | 0c4656b | 2018-05-17 15:24:06 +0200 | [diff] [blame^] | 1 | // SPDX-License-Identifier: GPL-2.0+ |
| 2 | /* |
| 3 | * Copyright (C) 2018, STMicroelectronics - All Rights Reserved |
| 4 | */ |
| 5 | |
| 6 | #include <common.h> |
| 7 | #include <command.h> |
| 8 | #include <misc.h> |
| 9 | #include <errno.h> |
| 10 | #include <dm/device.h> |
| 11 | #include <dm/uclass.h> |
| 12 | |
| 13 | #define STM32MP_OTP_BANK 0 |
| 14 | |
| 15 | /* |
| 16 | * The 'fuse' command API |
| 17 | */ |
| 18 | int fuse_read(u32 bank, u32 word, u32 *val) |
| 19 | { |
| 20 | int ret = 0; |
| 21 | struct udevice *dev; |
| 22 | |
| 23 | switch (bank) { |
| 24 | case STM32MP_OTP_BANK: |
| 25 | ret = uclass_get_device_by_driver(UCLASS_MISC, |
| 26 | DM_GET_DRIVER(stm32mp_bsec), |
| 27 | &dev); |
| 28 | if (ret) |
| 29 | return ret; |
| 30 | ret = misc_read(dev, word * 4 + STM32_BSEC_SHADOW_OFFSET, |
| 31 | val, 4); |
| 32 | break; |
| 33 | |
| 34 | default: |
| 35 | printf("stm32mp %s: wrong value for bank %i\n", __func__, bank); |
| 36 | ret = -EINVAL; |
| 37 | break; |
| 38 | } |
| 39 | |
| 40 | return ret; |
| 41 | } |
| 42 | |
| 43 | int fuse_prog(u32 bank, u32 word, u32 val) |
| 44 | { |
| 45 | struct udevice *dev; |
| 46 | int ret; |
| 47 | |
| 48 | switch (bank) { |
| 49 | case STM32MP_OTP_BANK: |
| 50 | ret = uclass_get_device_by_driver(UCLASS_MISC, |
| 51 | DM_GET_DRIVER(stm32mp_bsec), |
| 52 | &dev); |
| 53 | if (ret) |
| 54 | return ret; |
| 55 | ret = misc_write(dev, word * 4 + STM32_BSEC_OTP_OFFSET, |
| 56 | &val, 4); |
| 57 | break; |
| 58 | |
| 59 | default: |
| 60 | printf("stm32mp %s: wrong value for bank %i\n", __func__, bank); |
| 61 | ret = -EINVAL; |
| 62 | break; |
| 63 | } |
| 64 | |
| 65 | return ret; |
| 66 | } |
| 67 | |
| 68 | int fuse_sense(u32 bank, u32 word, u32 *val) |
| 69 | { |
| 70 | struct udevice *dev; |
| 71 | int ret; |
| 72 | |
| 73 | switch (bank) { |
| 74 | case STM32MP_OTP_BANK: |
| 75 | ret = uclass_get_device_by_driver(UCLASS_MISC, |
| 76 | DM_GET_DRIVER(stm32mp_bsec), |
| 77 | &dev); |
| 78 | if (ret) |
| 79 | return ret; |
| 80 | ret = misc_read(dev, word * 4 + STM32_BSEC_OTP_OFFSET, val, 4); |
| 81 | break; |
| 82 | |
| 83 | default: |
| 84 | printf("stm32mp %s: wrong value for bank %i\n", __func__, bank); |
| 85 | ret = -EINVAL; |
| 86 | break; |
| 87 | } |
| 88 | |
| 89 | return ret; |
| 90 | } |
| 91 | |
| 92 | int fuse_override(u32 bank, u32 word, u32 val) |
| 93 | { |
| 94 | struct udevice *dev; |
| 95 | int ret; |
| 96 | |
| 97 | switch (bank) { |
| 98 | case STM32MP_OTP_BANK: |
| 99 | ret = uclass_get_device_by_driver(UCLASS_MISC, |
| 100 | DM_GET_DRIVER(stm32mp_bsec), |
| 101 | &dev); |
| 102 | if (ret) |
| 103 | return ret; |
| 104 | ret = misc_write(dev, word * 4 + STM32_BSEC_SHADOW_OFFSET, |
| 105 | &val, 4); |
| 106 | break; |
| 107 | |
| 108 | default: |
| 109 | printf("stm32mp %s: wrong value for bank %i\n", |
| 110 | __func__, bank); |
| 111 | ret = -EINVAL; |
| 112 | break; |
| 113 | } |
| 114 | |
| 115 | return ret; |
| 116 | } |