bertos/cpu/arm/drv/flash_lpc2.c

   1 /**
   2  * \file
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   4  * This file is part of BeRTOS.
   5  *
   6  * Bertos is free software; you can redistribute it and/or modify
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   9  * (at your option) any later version.
  10  *
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  14  * GNU General Public License for more details.
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  19  *
  20  * As a special exception, you may use this file as part of a free software
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  24  * file does not by itself cause the resulting executable to be covered by
  25  * the GNU General Public License.  This exception does not however
  26  * invalidate any other reasons why the executable file might be covered by
  27  * the GNU General Public License.
  28  *
  29  * Copyright 2010 Develer S.r.l. (http://www.develer.com/)
  30  *
  31  * -->
  32  *
  33  * \author Francesco Sacchi <batt@develer.com>
  34  * \author Daniele Basile <asterix@develer.com>
  35  *
  36  * \brief NPX lpc23xx embedded flash read/write driver.
  37  *
  38  * notest:arm
  39  */
  40
  41 #include "flash_lpc2.h"
  42 #include "cfg/cfg_emb_flash.h"
  43
  44 // Define log settings for cfg/log.h
  45 #define LOG_LEVEL    CONFIG_FLASH_EMB_LOG_LEVEL
  46 #define LOG_FORMAT   CONFIG_FLASH_EMB_LOG_FORMAT
  47 #include <cfg/log.h>
  48 #include <cfg/macros.h>
  49
  50 #include <cpu/irq.h>
  51 #include <cpu/attr.h>
  52 #include <cpu/power.h>
  53 #include <cpu/types.h>
  54
  55 #include <io/kblock.h>
  56 #include <io/arm.h>
  57
  58 #include <drv/timer.h>
  59 #include <drv/flash.h>
  60
  61 #include <struct/bitarray.h>
  62
  63 #include <string.h>
  64
  65 /* Embedded flash programming defines. */
  66 #define IAP_ADDRESS 0x7ffffff1
  67
  68 typedef enum IapCommands
  69 {
  70         PREPARE_SECTOR_FOR_WRITE = 50,
  71         COPY_RAM_TO_FLASH = 51,
  72         ERASE_SECTOR = 52,
  73         BLANK_CHECK_SECTOR = 53,
  74         READ_PART_ID = 54,
  75         READ_BOOT_VER = 55,
  76         COMPARE = 56,
  77         REINVOKE_ISP = 57,
  78 } IapCommands;
  79
  80 #if CPU_ARM_LPC2378
  81         #define FLASH_MEM_SIZE         (504 * 1024L)
  82         #define FLASH_PAGE_SIZE_BYTES          4096
  83         #define FLASH_REAL_PAGE_CNT              28
  84 #else
  85         #error Unknown CPU
  86 #endif
  87
  88 #define CMD_SUCCESS 0
  89
  90 struct FlashHardware
  91 {
  92         uint8_t status;
  93 };
  94
  95 #define FLASH_PAGE_CNT  FLASH_MEM_SIZE / FLASH_PAGE_SIZE_BYTES
  96
  97 BITARRAY_ALLOC(page_dirty, FLASH_PAGE_CNT);
  98 static BitArray lpc2_bitx;
  99
 100 uint8_t erase_group[] = {
 101
 102         4096 / FLASH_PAGE_SIZE_BYTES, 4096 / FLASH_PAGE_SIZE_BYTES,
 103         4096 / FLASH_PAGE_SIZE_BYTES, 4096 / FLASH_PAGE_SIZE_BYTES,
 104
 105         4096 / FLASH_PAGE_SIZE_BYTES, 4096 / FLASH_PAGE_SIZE_BYTES,
 106         4096 / FLASH_PAGE_SIZE_BYTES, 4096 / FLASH_PAGE_SIZE_BYTES,
 107
 108         32768 / FLASH_PAGE_SIZE_BYTES, 32768 / FLASH_PAGE_SIZE_BYTES,
 109         32768 / FLASH_PAGE_SIZE_BYTES, 32768 / FLASH_PAGE_SIZE_BYTES,
 110
 111         32768 / FLASH_PAGE_SIZE_BYTES, 32768 / FLASH_PAGE_SIZE_BYTES,
 112         32768 / FLASH_PAGE_SIZE_BYTES, 32768 / FLASH_PAGE_SIZE_BYTES,
 113
 114         32768 / FLASH_PAGE_SIZE_BYTES, 32768 / FLASH_PAGE_SIZE_BYTES,
 115         32768 / FLASH_PAGE_SIZE_BYTES, 32768 / FLASH_PAGE_SIZE_BYTES,
 116
 117         32768 / FLASH_PAGE_SIZE_BYTES, 32768 / FLASH_PAGE_SIZE_BYTES,
 118         4096 / FLASH_PAGE_SIZE_BYTES, 4096 / FLASH_PAGE_SIZE_BYTES,
 119
 120         4096 / FLASH_PAGE_SIZE_BYTES, 4096 / FLASH_PAGE_SIZE_BYTES,
 121         4096 / FLASH_PAGE_SIZE_BYTES, 4096 / FLASH_PAGE_SIZE_BYTES,
 122 };
 123
 124 typedef struct IapCmd
 125 {
 126         uint32_t cmd;
 127         uint32_t param[4];
 128 } IapCmd;
 129
 130 typedef struct IapRes
 131 {
 132         uint32_t status;
 133         uint32_t res[2];
 134 } IapRes;
 135
 136 typedef void (*iap_callback_t)(IapCmd *, IapRes *);
 137
 138 iap_callback_t iap = (iap_callback_t)IAP_ADDRESS;
 139
 140 static size_t sector_size(uint32_t page)
 141 {
 142         if (page < 8)
 143                 return 4096;
 144         else if (page < 22)
 145                 return 32768;
 146         else if (page < 28)
 147                 return 4096;
 148
 149         ASSERT(0);
 150         return 0;
 151 }
 152
 153 static size_t sector_addr(uint32_t page)
 154 {
 155         if (page < 8)
 156                 return page * 4096;
 157         else if (page < 22)
 158                 return (page - 8) * 32768 + 4096 * 8;
 159         else if (page < 28)
 160                 return (page - 22) * 4096 + 32768 * 14 + 4096 * 8;
 161
 162         ASSERT(0);
 163         return 0;
 164 }
 165
 166
 167 static uint32_t addr_to_sector(size_t addr)
 168 {
 169         if (addr < 4096 * 8)
 170                 return addr / 4096;
 171         else if (addr < 4096 * 8 + 32768L * 14)
 172                 return ((addr - 4096 * 8) / 32768) + 8;
 173         else if (addr < 4096 * 8 + 32768L * 14 + 4096 * 6)
 174                 return ((addr - 4096 * 8 - 32768L * 14) / 4096) + 22;
 175
 176         ASSERT(0);
 177         return 0;
 178 }
 179
 180 static size_t lpc2_flash_readDirect(struct KBlock *blk, block_idx_t idx, void *buf, size_t offset, size_t size)
 181 {
 182         memcpy(buf, (void *)(idx * blk->blk_size), size);
 183         return size;
 184 }
 185
 186 static size_t lpc2_flash_writeDirect(struct KBlock *blk, block_idx_t idx, const void *_buf, size_t offset, size_t size)
 187 {
 188         ASSERT(offset == 0);
 189         ASSERT(FLASH_PAGE_SIZE_BYTES == size);
 190
 191         Flash *fls = FLASH_CAST(blk);
 192         if (!(fls->blk.priv.flags & KB_WRITE_ONCE))
 193                 ASSERT(sector_size(idx) <= FLASH_PAGE_SIZE_BYTES);
 194
 195         const uint8_t *buf = (const uint8_t *)_buf;
 196         cpu_flags_t flags;
 197
 198         //Compute page address of current page.
 199         uint32_t addr = idx * blk->blk_size;
 200         uint32_t sector = addr_to_sector(addr);
 201         // Compute the first page index in the sector to manage the status
 202         int idx_sector = sector_addr(sector) /  blk->blk_size;
 203
 204         LOG_INFO("Writing page[%ld]sector[%ld]idx[%d]\n", idx, sector, idx_sector);
 205         IRQ_SAVE_DISABLE(flags);
 206
 207         IapCmd cmd;
 208         IapRes res;
 209         cmd.cmd = PREPARE_SECTOR_FOR_WRITE;
 210         cmd.param[0] = cmd.param[1] = sector;
 211         iap(&cmd, &res);
 212
 213         if (res.status != CMD_SUCCESS)
 214                 goto flash_error;
 215
 216         if ((fls->blk.priv.flags & KB_WRITE_ONCE) &&
 217                         bitarray_isRangeFull(&lpc2_bitx, idx_sector, erase_group[sector]))
 218         {
 219                 kputs("blocchi pieni\n");
 220                 ASSERT(0);
 221                 goto flash_error;
 222         }
 223
 224         bool erase = false;
 225         if ((fls->blk.priv.flags & KB_WRITE_ONCE) &&
 226                         bitarray_isRangeEmpty(&lpc2_bitx, idx_sector, erase_group[sector]))
 227                 erase = true;
 228
 229         if (!(fls->blk.priv.flags & KB_WRITE_ONCE))
 230                 erase = true;
 231
 232         if (erase)
 233         {
 234                 cmd.cmd = ERASE_SECTOR;
 235                 cmd.param[0] = cmd.param[1] = sector;
 236                 cmd.param[2] = CPU_FREQ / 1000;
 237                 iap(&cmd, &res);
 238
 239                 if (res.status != CMD_SUCCESS)
 240                         goto flash_error;
 241         }
 242
 243         LOG_INFO("Writing page [%ld], addr [%ld] in sector[%ld]\n", idx, addr, sector);
 244         cmd.cmd = PREPARE_SECTOR_FOR_WRITE;
 245         cmd.param[0] = cmd.param[1] = sector;
 246         iap(&cmd, &res);
 247
 248         if (res.status != CMD_SUCCESS)
 249                 goto flash_error;
 250
 251         if (fls->blk.priv.flags & KB_WRITE_ONCE)
 252         {
 253                 if (bitarray_test(&lpc2_bitx, idx))
 254                 {
 255                         ASSERT(0);
 256                         goto flash_error;
 257                 }
 258                 else
 259                         bitarray_set(&lpc2_bitx, idx);
 260         }
 261
 262         cmd.cmd = COPY_RAM_TO_FLASH;
 263         cmd.param[0] = addr;
 264         cmd.param[1] = (uint32_t)buf;
 265         cmd.param[2] = FLASH_PAGE_SIZE_BYTES;
 266         cmd.param[3] = CPU_FREQ / 1000;
 267         iap(&cmd, &res);
 268
 269         if (res.status != CMD_SUCCESS)
 270                 goto flash_error;
 271
 272         IRQ_RESTORE(flags);
 273         LOG_INFO("Done\n");
 274
 275         return blk->blk_size;
 276
 277 flash_error:
 278         LOG_ERR("%ld\n", res.status);
 279         fls->hw->status |= FLASH_WR_ERR;
 280         return 0;
 281 }
 282
 283 static int lpc2_flash_close(UNUSED_ARG(struct KBlock, *blk))
 284 {
 285         memset(page_dirty, 0, sizeof(page_dirty));
 286         return 0;
 287 }
 288
 289
 290 static int lpc2_flash_error(struct KBlock *blk)
 291 {
 292         Flash *fls = FLASH_CAST(blk);
 293         return fls->hw->status;
 294 }
 295
 296 static void lpc2_flash_clearerror(struct KBlock *blk)
 297 {
 298         Flash *fls = FLASH_CAST(blk);
 299         fls->hw->status = 0;
 300 }
 301
 302 static const KBlockVTable flash_lpc2_buffered_vt =
 303 {
 304         .readDirect = lpc2_flash_readDirect,
 305         .writeDirect = lpc2_flash_writeDirect,
 306
 307         .readBuf = kblock_swReadBuf,
 308         .writeBuf = kblock_swWriteBuf,
 309         .load = kblock_swLoad,
 310         .store = kblock_swStore,
 311
 312         .close = lpc2_flash_close,
 313
 314         .error = lpc2_flash_error,
 315         .clearerr = lpc2_flash_clearerror,
 316 };
 317
 318 static const KBlockVTable flash_lpc2_unbuffered_vt =
 319 {
 320         .readDirect = lpc2_flash_readDirect,
 321         .writeDirect = lpc2_flash_writeDirect,
 322
 323         .close = lpc2_flash_close,
 324
 325         .error = lpc2_flash_error,
 326         .clearerr = lpc2_flash_clearerror,
 327 };
 328
 329 static struct FlashHardware flash_lpc2_hw;
 330 static uint8_t flash_buf[FLASH_PAGE_SIZE_BYTES];
 331
 332 static void common_init(Flash *fls)
 333 {
 334         memset(fls, 0, sizeof(*fls));
 335         DB(fls->blk.priv.type = KBT_FLASH);
 336
 337         fls->hw = &flash_lpc2_hw;
 338
 339         fls->blk.blk_size = FLASH_PAGE_SIZE_BYTES;
 340         fls->blk.blk_cnt = FLASH_MEM_SIZE / FLASH_PAGE_SIZE_BYTES;
 341
 342         bitarray_init(&lpc2_bitx, FLASH_PAGE_CNT, page_dirty, sizeof(page_dirty));
 343 }
 344
 345 void flash_hw_init(Flash *fls, int flags)
 346 {
 347         common_init(fls);
 348         fls->blk.priv.vt = &flash_lpc2_buffered_vt;
 349         fls->blk.priv.flags |= KB_BUFFERED | KB_PARTIAL_WRITE | flags;
 350         fls->blk.priv.buf = flash_buf;
 351
 352         /* Load the first block in the cache */
 353         void *flash_start = 0x0;
 354         memcpy(fls->blk.priv.buf, flash_start, fls->blk.blk_size);
 355 }
 356
 357 void flash_hw_initUnbuffered(Flash *fls, int flags)
 358 {
 359         common_init(fls);
 360         fls->blk.priv.vt = &flash_lpc2_unbuffered_vt;
 361         fls->blk.priv.flags |= flags;
 362 }