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         int flags;
  94 };
  95
  96 #define FLASH_PAGE_CNT  FLASH_MEM_SIZE / FLASH_PAGE_SIZE_BYTES
  97
  98 BITARRAY_ALLOC(page_dirty, FLASH_PAGE_CNT);
  99 static BitArray lpc2_bitx;
 100
 101 uint8_t erase_group[] = {
 102
 103         4096 / FLASH_PAGE_SIZE_BYTES, 4096 / FLASH_PAGE_SIZE_BYTES,
 104         4096 / FLASH_PAGE_SIZE_BYTES, 4096 / FLASH_PAGE_SIZE_BYTES,
 105
 106         4096 / FLASH_PAGE_SIZE_BYTES, 4096 / FLASH_PAGE_SIZE_BYTES,
 107         4096 / FLASH_PAGE_SIZE_BYTES, 4096 / FLASH_PAGE_SIZE_BYTES,
 108
 109         32768 / FLASH_PAGE_SIZE_BYTES, 32768 / FLASH_PAGE_SIZE_BYTES,
 110         32768 / FLASH_PAGE_SIZE_BYTES, 32768 / FLASH_PAGE_SIZE_BYTES,
 111
 112         32768 / FLASH_PAGE_SIZE_BYTES, 32768 / FLASH_PAGE_SIZE_BYTES,
 113         32768 / FLASH_PAGE_SIZE_BYTES, 32768 / FLASH_PAGE_SIZE_BYTES,
 114
 115         32768 / FLASH_PAGE_SIZE_BYTES, 32768 / FLASH_PAGE_SIZE_BYTES,
 116         32768 / FLASH_PAGE_SIZE_BYTES, 32768 / FLASH_PAGE_SIZE_BYTES,
 117
 118         32768 / FLASH_PAGE_SIZE_BYTES, 32768 / FLASH_PAGE_SIZE_BYTES,
 119         4096 / FLASH_PAGE_SIZE_BYTES, 4096 / FLASH_PAGE_SIZE_BYTES,
 120
 121         4096 / FLASH_PAGE_SIZE_BYTES, 4096 / FLASH_PAGE_SIZE_BYTES,
 122         4096 / FLASH_PAGE_SIZE_BYTES, 4096 / FLASH_PAGE_SIZE_BYTES,
 123 };
 124
 125 typedef struct IapCmd
 126 {
 127         uint32_t cmd;
 128         uint32_t param[4];
 129 } IapCmd;
 130
 131 typedef struct IapRes
 132 {
 133         uint32_t status;
 134         uint32_t res[2];
 135 } IapRes;
 136
 137 typedef void (*iap_callback_t)(IapCmd *, IapRes *);
 138
 139 iap_callback_t iap = (iap_callback_t)IAP_ADDRESS;
 140
 141 static size_t sector_size(uint32_t page)
 142 {
 143         if (page < 8)
 144                 return 4096;
 145         else if (page < 22)
 146                 return 32768;
 147         else if (page < 28)
 148                 return 4096;
 149
 150         ASSERT(0);
 151         return 0;
 152 }
 153
 154 static size_t sector_addr(uint32_t page)
 155 {
 156         if (page < 8)
 157                 return page * 4096;
 158         else if (page < 22)
 159                 return (page - 8) * 32768 + 4096 * 8;
 160         else if (page < 28)
 161                 return (page - 22) * 4096 + 32768 * 14 + 4096 * 8;
 162
 163         ASSERT(0);
 164         return 0;
 165 }
 166
 167
 168 static uint32_t addr_to_sector(size_t addr)
 169 {
 170         if (addr < 4096 * 8)
 171                 return addr / 4096;
 172         else if (addr < 4096 * 8 + 32768L * 14)
 173                 return ((addr - 4096 * 8) / 32768) + 8;
 174         else if (addr < 4096 * 8 + 32768L * 14 + 4096 * 6)
 175                 return ((addr - 4096 * 8 - 32768L * 14) / 4096) + 22;
 176
 177         ASSERT(0);
 178         return 0;
 179 }
 180
 181 static size_t lpc2_flash_readDirect(struct KBlock *blk, block_idx_t idx, void *buf, size_t offset, size_t size)
 182 {
 183         memcpy(buf, (void *)(idx * blk->blk_size + offset), size);
 184         return size;
 185 }
 186
 187 static size_t lpc2_flash_writeDirect(struct KBlock *blk, block_idx_t idx, const void *_buf, size_t offset, size_t size)
 188 {
 189         ASSERT(offset == 0);
 190         ASSERT(FLASH_PAGE_SIZE_BYTES == size);
 191
 192         Flash *fls = FLASH_CAST(blk);
 193         if (!(fls->hw->flags & FLASH_WRITE_ONCE))
 194                 ASSERT(sector_size(idx) <= FLASH_PAGE_SIZE_BYTES);
 195
 196         const uint8_t *buf = (const uint8_t *)_buf;
 197         cpu_flags_t flags;
 198
 199         //Compute page address of current page.
 200         uint32_t addr = idx * blk->blk_size;
 201         uint32_t sector = addr_to_sector(addr);
 202         // Compute the first page index in the sector to manage the status
 203         int idx_sector = sector_addr(sector) /  blk->blk_size;
 204
 205         LOG_INFO("Writing page[%ld]sector[%ld]idx[%d]\n", idx, sector, idx_sector);
 206         IRQ_SAVE_DISABLE(flags);
 207
 208         IapCmd cmd;
 209         IapRes res;
 210         cmd.cmd = PREPARE_SECTOR_FOR_WRITE;
 211         cmd.param[0] = cmd.param[1] = sector;
 212         iap(&cmd, &res);
 213
 214         if (res.status != CMD_SUCCESS)
 215                 goto flash_error;
 216
 217         if ((fls->hw->flags & FLASH_WRITE_ONCE) &&
 218                         bitarray_isRangeFull(&lpc2_bitx, idx_sector, erase_group[sector]))
 219         {
 220                 kputs("blocchi pieni\n");
 221                 ASSERT(0);
 222                 goto flash_error;
 223         }
 224
 225         bool erase = false;
 226         if ((fls->hw->flags & FLASH_WRITE_ONCE) &&
 227                         bitarray_isRangeEmpty(&lpc2_bitx, idx_sector, erase_group[sector]))
 228                 erase = true;
 229
 230         if (!(fls->hw->flags & FLASH_WRITE_ONCE))
 231                 erase = true;
 232
 233         if (erase)
 234         {
 235                 cmd.cmd = ERASE_SECTOR;
 236                 cmd.param[0] = cmd.param[1] = sector;
 237                 cmd.param[2] = CPU_FREQ / 1000;
 238                 iap(&cmd, &res);
 239
 240                 if (res.status != CMD_SUCCESS)
 241                         goto flash_error;
 242         }
 243
 244         LOG_INFO("Writing page [%ld], addr [%ld] in sector[%ld]\n", idx, addr, sector);
 245         cmd.cmd = PREPARE_SECTOR_FOR_WRITE;
 246         cmd.param[0] = cmd.param[1] = sector;
 247         iap(&cmd, &res);
 248
 249         if (res.status != CMD_SUCCESS)
 250                 goto flash_error;
 251
 252         if (fls->hw->flags & FLASH_WRITE_ONCE)
 253         {
 254                 if (bitarray_test(&lpc2_bitx, idx))
 255                 {
 256                         ASSERT(0);
 257                         goto flash_error;
 258                 }
 259                 else
 260                         bitarray_set(&lpc2_bitx, idx);
 261         }
 262
 263         cmd.cmd = COPY_RAM_TO_FLASH;
 264         cmd.param[0] = addr;
 265         cmd.param[1] = (uint32_t)buf;
 266         cmd.param[2] = FLASH_PAGE_SIZE_BYTES;
 267         cmd.param[3] = CPU_FREQ / 1000;
 268         iap(&cmd, &res);
 269
 270         if (res.status != CMD_SUCCESS)
 271                 goto flash_error;
 272
 273         IRQ_RESTORE(flags);
 274         LOG_INFO("Done\n");
 275
 276         return blk->blk_size;
 277
 278 flash_error:
 279         IRQ_RESTORE(flags);
 280         LOG_ERR("%ld\n", res.status);
 281         fls->hw->status |= FLASH_WR_ERR;
 282         return 0;
 283 }
 284
 285 static int lpc2_flash_close(UNUSED_ARG(struct KBlock, *blk))
 286 {
 287         memset(page_dirty, 0, sizeof(page_dirty));
 288         return 0;
 289 }
 290
 291
 292 static int lpc2_flash_error(struct KBlock *blk)
 293 {
 294         Flash *fls = FLASH_CAST(blk);
 295         return fls->hw->status;
 296 }
 297
 298 static void lpc2_flash_clearerror(struct KBlock *blk)
 299 {
 300         Flash *fls = FLASH_CAST(blk);
 301         fls->hw->status = 0;
 302 }
 303
 304 static const KBlockVTable flash_lpc2_buffered_vt =
 305 {
 306         .readDirect = lpc2_flash_readDirect,
 307         .writeDirect = lpc2_flash_writeDirect,
 308
 309         .readBuf = kblock_swReadBuf,
 310         .writeBuf = kblock_swWriteBuf,
 311         .load = kblock_swLoad,
 312         .store = kblock_swStore,
 313
 314         .close = lpc2_flash_close,
 315
 316         .error = lpc2_flash_error,
 317         .clearerr = lpc2_flash_clearerror,
 318 };
 319
 320 static const KBlockVTable flash_lpc2_unbuffered_vt =
 321 {
 322         .readDirect = lpc2_flash_readDirect,
 323         .writeDirect = lpc2_flash_writeDirect,
 324
 325         .close = lpc2_flash_close,
 326
 327         .error = lpc2_flash_error,
 328         .clearerr = lpc2_flash_clearerror,
 329 };
 330
 331 static struct FlashHardware flash_lpc2_hw;
 332 static uint8_t flash_buf[FLASH_PAGE_SIZE_BYTES];
 333
 334 static void common_init(Flash *fls, int flags)
 335 {
 336         memset(fls, 0, sizeof(*fls));
 337         DB(fls->blk.priv.type = KBT_FLASH);
 338
 339         fls->hw = &flash_lpc2_hw;
 340         fls->hw->flags = flags;
 341
 342         fls->blk.blk_size = FLASH_PAGE_SIZE_BYTES;
 343         fls->blk.blk_cnt = FLASH_MEM_SIZE / FLASH_PAGE_SIZE_BYTES;
 344
 345         bitarray_init(&lpc2_bitx, FLASH_PAGE_CNT, page_dirty, sizeof(page_dirty));
 346 }
 347
 348 void flash_hw_init(Flash *fls, int flags)
 349 {
 350         common_init(fls, flags);
 351         fls->blk.priv.vt = &flash_lpc2_buffered_vt;
 352         fls->blk.priv.flags |= KB_BUFFERED | KB_PARTIAL_WRITE;
 353         fls->blk.priv.buf = flash_buf;
 354
 355
 356         /* Load the first block in the cache */
 357         void *flash_start = 0x0;
 358         memcpy(fls->blk.priv.buf, flash_start, fls->blk.blk_size);
 359 }
 360
 361 void flash_hw_initUnbuffered(Flash *fls, int flags)
 362 {
 363         common_init(fls, flags);
 364         fls->blk.priv.vt = &flash_lpc2_unbuffered_vt;
 365 }