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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 | /* * SPDX-License-Identifier: Apache-2.0 * * Copyright (c) 2024 Nuvoton Technology Corporation. */ #define DT_DRV_COMPAT nuvoton_numaker_rmc #include <string.h> #include <errno.h> #include <zephyr/kernel.h> #include <zephyr/device.h> #include <zephyr/drivers/flash.h> #include <zephyr/logging/log.h> #include "flash_priv.h" #include <NuMicro.h> LOG_MODULE_REGISTER(flash_numaker_rmc, CONFIG_FLASH_LOG_LEVEL); #define SOC_NV_FLASH_NODE DT_INST(0, soc_nv_flash) #define SOC_NV_FLASH_WRITE_BLOCK_SIZE DT_PROP_OR(SOC_NV_FLASH_NODE, write_block_size, 0x04) struct flash_numaker_data { RMC_T *rmc; struct k_sem write_lock; uint32_t flash_block_base; }; static const struct flash_parameters flash_numaker_parameters = { .write_block_size = SOC_NV_FLASH_WRITE_BLOCK_SIZE, .erase_value = 0xff, .caps = { .no_explicit_erase = true, }, }; /* Validate offset and length */ static bool flash_numaker_is_range_valid(off_t offset, size_t len) { uint32_t aprom_size = RMC_APROM_END - RMC_APROM_BASE; /* check for min value */ if ((offset < 0) || (len == 0)) { return false; } /* check for max value */ if (offset >= aprom_size || len > aprom_size || (aprom_size - offset) < len) { return false; } return true; } /* * Erase a flash memory area. * * param dev Device struct * param offset The address's offset * param len The size of the buffer * return 0 on success * return -EINVAL erroneous code */ static int flash_numaker_erase(const struct device *dev, off_t offset, size_t len) { struct flash_numaker_data *dev_data = dev->data; uint32_t rc = 0; unsigned int key; int page_nums = len / RMC_FLASH_PAGE_SIZE; uint32_t addr = dev_data->flash_block_base + offset; /* return SUCCESS for len == 0 (required by tests/drivers/flash) */ if (len == 0) { return 0; } /* Validate range */ if (!flash_numaker_is_range_valid(offset, len)) { return -EINVAL; } /* check alignment and erase only by pages */ if (((addr % RMC_FLASH_PAGE_SIZE) != 0) || ((len % RMC_FLASH_PAGE_SIZE) != 0)) { return -EINVAL; } /* take semaphore */ if (k_sem_take(&dev_data->write_lock, K_NO_WAIT)) { return -EACCES; } SYS_UnlockReg(); key = irq_lock(); while (page_nums) { /* erase page */ if (RMC_Erase(addr)) { LOG_ERR("Erase flash page failed or erase time-out"); rc = -EIO; goto done; } page_nums--; addr += RMC_FLASH_PAGE_SIZE; } done: SYS_LockReg(); irq_unlock(key); /* release semaphore */ k_sem_give(&dev_data->write_lock); return rc; } /* * Read a flash memory area. * * param dev Device struct * param offset The address's offset * param data The buffer to store or read the value * param length The size of the buffer * return 0 on success, * return -EIO erroneous code */ static int flash_numaker_read(const struct device *dev, off_t offset, void *data, size_t len) { struct flash_numaker_data *dev_data = dev->data; uint32_t addr = dev_data->flash_block_base + offset; /* return SUCCESS for len == 0 (required by tests/drivers/flash) */ if (len == 0) { return 0; } /* Validate range */ if (!flash_numaker_is_range_valid(offset, len)) { return -EINVAL; } /* read flash */ memcpy(data, (void *)addr, len); return 0; } static int32_t flash_numaker_block_write(uint32_t u32_addr, const uint8_t *pu8_data, int block_size) { int32_t retval; const uint32_t *pu32_data = (const uint32_t *)pu8_data; SYS_UnlockReg(); if (block_size == 4) { retval = RMC_Write(u32_addr, *pu32_data); } else if (block_size == 8) { retval = RMC_Write(u32_addr, *pu32_data) | RMC_Write(u32_addr + 4, *(pu32_data + 1)); } else { retval = -1; } SYS_LockReg(); return retval; } static int flash_numaker_write(const struct device *dev, off_t offset, const void *data, size_t len) { struct flash_numaker_data *dev_data = dev->data; uint32_t rc = 0; unsigned int key; uint32_t addr = dev_data->flash_block_base + offset; int block_size = flash_numaker_parameters.write_block_size; int blocks = len / flash_numaker_parameters.write_block_size; const uint8_t *pu8_data = (const uint8_t *)data; /* return SUCCESS for len == 0 (required by tests/drivers/flash) */ if (len == 0) { return 0; } /* Validate range */ if (!flash_numaker_is_range_valid(offset, len)) { return -EINVAL; } /* Validate address alignment */ if ((addr % flash_numaker_parameters.write_block_size) != 0) { return -EINVAL; } /* Validate write size be multiples of the write block size */ if ((len % block_size) != 0) { return -EINVAL; } /* Validate offset be multiples of the write block size */ if ((offset % block_size) != 0) { return -EINVAL; } if (k_sem_take(&dev_data->write_lock, K_FOREVER)) { return -EACCES; } key = irq_lock(); while (blocks) { if (flash_numaker_block_write(addr, pu8_data, block_size)) { rc = -EIO; goto done; } pu8_data += block_size; addr += block_size; blocks--; } done: irq_unlock(key); k_sem_give(&dev_data->write_lock); return rc; } #if defined(CONFIG_FLASH_PAGE_LAYOUT) static const struct flash_pages_layout dev_layout = { .pages_count = DT_REG_SIZE(SOC_NV_FLASH_NODE) / DT_PROP(SOC_NV_FLASH_NODE, erase_block_size), .pages_size = DT_PROP(SOC_NV_FLASH_NODE, erase_block_size), }; static void flash_numaker_pages_layout(const struct device *dev, const struct flash_pages_layout **layout, size_t *layout_size) { *layout = &dev_layout; *layout_size = 1; } #endif /* CONFIG_FLASH_PAGE_LAYOUT */ static const struct flash_parameters *flash_numaker_get_parameters(const struct device *dev) { ARG_UNUSED(dev); return &flash_numaker_parameters; } static struct flash_numaker_data flash_data; static const struct flash_driver_api flash_numaker_api = { .erase = flash_numaker_erase, .write = flash_numaker_write, .read = flash_numaker_read, .get_parameters = flash_numaker_get_parameters, #if defined(CONFIG_FLASH_PAGE_LAYOUT) .page_layout = flash_numaker_pages_layout, #endif }; static int flash_numaker_init(const struct device *dev) { struct flash_numaker_data *dev_data = dev->data; k_sem_init(&dev_data->write_lock, 1, 1); /* Enable RMC ISP function */ SYS_UnlockReg(); RMC_Open(); /* Enable APROM update. */ RMC_ENABLE_AP_UPDATE(); SYS_LockReg(); dev_data->flash_block_base = (uint32_t)RMC_APROM_BASE; dev_data->rmc = (RMC_T *)DT_REG_ADDR(DT_NODELABEL(rmc)); return 0; } DEVICE_DT_INST_DEFINE(0, flash_numaker_init, NULL, &flash_data, NULL, POST_KERNEL, CONFIG_FLASH_INIT_PRIORITY, &flash_numaker_api); |