packages/devs/flash/arm/mxc/v2_0/include/mxc_nfc_v3.h

   1 #ifndef _MXC_NFC_V3_H_
   2 #define _MXC_NFC_V3_H_
   3 //==========================================================================
   4 //
   5 //      mxc_nfc_v3.h
   6 //
   7 //      Flash programming to support NAND flash on Freescale MXC platforms
   8 //
   9 //==========================================================================
  10 //####ECOSGPLCOPYRIGHTBEGIN####
  11 // -------------------------------------------
  12 // This file is part of eCos, the Embedded Configurable Operating System.
  13 // Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc.
  14 //
  15 // eCos is free software; you can redistribute it and/or modify it under
  16 // the terms of the GNU General Public License as published by the Free
  17 // Software Foundation; either version 2 or (at your option) any later version.
  18 //
  19 // eCos is distributed in the hope that it will be useful, but WITHOUT ANY
  20 // WARRANTY; without even the implied warranty of MERCHANTABILITY or
  21 // FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  22 // for more details.
  23 //
  24 // You should have received a copy of the GNU General Public License along
  25 // with eCos; if not, write to the Free Software Foundation, Inc.,
  26 // 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
  27 //
  28 // As a special exception, if other files instantiate templates or use macros
  29 // or inline functions from this file, or you compile this file and link it
  30 // with other works to produce a work based on this file, this file does not
  31 // by itself cause the resulting work to be covered by the GNU General Public
  32 // License. However the source code for this file must still be made available
  33 // in accordance with section (3) of the GNU General Public License.
  34 //
  35 // This exception does not invalidate any other reasons why a work based on
  36 // this file might be covered by the GNU General Public License.
  37 //
  38 // Alternative licenses for eCos may be arranged by contacting Red Hat, Inc.
  39 // at http://sources.redhat.com/ecos/ecos-license/
  40 // -------------------------------------------
  41 //####ECOSGPLCOPYRIGHTEND####
  42 //==========================================================================
  43 //#####DESCRIPTIONBEGIN####
  44 //
  45 // Author(s):    Kevin Zhang <k.zhang@freescale.com>
  46 // Contributors: Kevin Zhang <k.zhang@freescale.com>
  47 // Date:         2008-06-02
  48 // Purpose:
  49 // Description:
  50 //
  51 //####DESCRIPTIONEND####
  52 //
  53 //==========================================================================
  54
  55 #include <pkgconf/devs_flash_onmxc.h>
  56 #include "mxc_nand_specifics.h"
  57
  58 #define PG_2K_DATA_OP_MULTI_CYCLES()    false
  59 #define ADDR_INPUT_SIZE                                 8
  60
  61 #define NAND_MAIN_BUF0                                  (NFC_BASE + 0x000)
  62 #define NAND_MAIN_BUF1                                  (NFC_BASE + 0x200)
  63 #define NAND_MAIN_BUF2                                  (NFC_BASE + 0x400)
  64 #define NAND_MAIN_BUF3                                  (NFC_BASE + 0x600)
  65 #define NAND_MAIN_BUF4                                  (NFC_BASE + 0x800)
  66 #define NAND_MAIN_BUF5                                  (NFC_BASE + 0xA00)
  67 #define NAND_MAIN_BUF6                                  (NFC_BASE + 0xC00)
  68 #define NAND_MAIN_BUF7                                  (NFC_BASE + 0xE00)
  69 #define NAND_SPAR_BUF0                                  (NFC_BASE + 0x1000)
  70 #define NAND_SPAR_BUF1                                  (NFC_BASE + 0x1040)
  71 #define NAND_SPAR_BUF2                                  (NFC_BASE + 0x1080)
  72 #define NAND_SPAR_BUF3                                  (NFC_BASE + 0x10C0)
  73 #define NAND_SPAR_BUF4                                  (NFC_BASE + 0x1100)
  74 #define NAND_SPAR_BUF5                                  (NFC_BASE + 0x1140)
  75 #define NAND_SPAR_BUF6                                  (NFC_BASE + 0x1180)
  76 #define NAND_SPAR_BUF7                                  (NFC_BASE + 0x11C0)
  77
  78 // The following defines are not used. Just for compilation purpose
  79 #define ECC_STATUS_RESULT_REG                   0xDEADFFFF
  80 #define NFC_DATA_INPUT(buf_no, earea, en)
  81 #define NFC_DATA_INPUT_2k(buf_no)
  82 // dummy function as it is not needed for automatic operations
  83 #define NFC_ADDR_INPUT(addr)
  84 #define NFC_ARCH_INIT()
  85 #define NUM_OF_CS_LINES                                    8
  86 #define NFC_BUFSIZE                                             4096
  87 #define NFC_SPARE_BUF_SZ                                  64
  88
  89 enum nfc_internal_buf {
  90         RAM_BUF_0 = 0x0 << 4,
  91         RAM_BUF_1 = 0x1 << 4,
  92         RAM_BUF_2 = 0x2 << 4,
  93         RAM_BUF_3 = 0x3 << 4,
  94         RAM_BUF_4 = 0x4 << 4,
  95         RAM_BUF_5 = 0x5 << 4,
  96         RAM_BUF_6 = 0x6 << 4,
  97         RAM_BUF_7 = 0x7 << 4,
  98 };
  99
 100 enum nfc_output_mode {
 101         FDO_PAGE_SPARE          = 0x0008,
 102         FDO_SPARE_ONLY          = 0x1008,  // LSB has to be 0x08
 103         FDO_FLASH_ID            = 0x0010,
 104         FDO_FLASH_STATUS        = 0x0020,
 105 };
 106
 107 #define MAX_LOOPS 10000
 108 #define wait_for_auto_prog_done()                                                                               \
 109         CYG_MACRO_START                                                                                                         \
 110         int loops = MAX_LOOPS;                                                                                          \
 111         static int max_loops = MAX_LOOPS;                                                                       \
 112         while ((nfc_reg_read(NFC_IPC_REG) & NFC_IPC_AUTO_DONE) == 0) {          \
 113                 HAL_DELAY_US(10);                                                                                               \
 114                 if (loops-- < 0) {                                                                                              \
 115                         diag_printf("%s: Timeout waiting for prog done\n", __FUNCTION__); \
 116                         break;                                                                                                          \
 117                 }                                                                                                                               \
 118         }                                                                                                                                       \
 119         if (loops < max_loops) {                                                                                        \
 120                 diag_printf1("%s: auto_prog done after %u loops\n",                             \
 121                                         __FUNCTION__, MAX_LOOPS - loops);                                       \
 122                 max_loops = loops;                                                                                              \
 123         }                                                                                                                                       \
 124         nfc_reg_write((nfc_reg_read(NFC_IPC_REG) & ~NFC_IPC_AUTO_DONE),         \
 125                                 NFC_IPC_REG);                                                                                   \
 126         CYG_MACRO_END
 127
 128 // Polls the NANDFC to wait for an operation to complete
 129 #define wait_op_done()                                                                                                  \
 130         CYG_MACRO_START                                                                                                         \
 131         int loops = MAX_LOOPS;                                                                                          \
 132         static int max_loops = MAX_LOOPS;                                                                       \
 133         while ((nfc_reg_read(NFC_IPC_REG) & NFC_IPC_INT) == 0) {                        \
 134                 HAL_DELAY_US(10);                                                                                               \
 135                 if (loops-- < 0) {                                                                                              \
 136                         diag_printf("%s: Timeout waiting for NFC ready\n", __FUNCTION__); \
 137                         break;                                                                                                          \
 138                 }                                                                                                                               \
 139         }                                                                                                                                       \
 140         if (loops < max_loops) {                                                                                        \
 141                 diag_printf1("%s: NFC ready after %u loops\n",                                  \
 142                                         __FUNCTION__, MAX_LOOPS - loops);                                       \
 143                 max_loops = loops;                                                                                              \
 144         }                                                                                                                                       \
 145         nfc_reg_write(0, NFC_IPC_REG);                                                                          \
 146         CYG_MACRO_END
 147
 148 #define nfc_reg_read(r)                 readl(r)
 149 #define nfc_reg_write(v, r)             writel(v, r)
 150
 151 static void write_nfc_ip_reg(u32 val, u32 reg)
 152 {
 153         unsigned int ipc = nfc_reg_read(NFC_IPC_REG);
 154         int loops = MAX_LOOPS;
 155         static int max_loops = MAX_LOOPS;
 156
 157         if (ipc & NFC_IPC_CACK) {
 158                 diag_printf("%s: IPC ACK already set!\n", __FUNCTION__);
 159         } else {
 160                 nfc_reg_write(NFC_IPC_CREQ, NFC_IPC_REG);
 161         }
 162
 163         while ((nfc_reg_read(NFC_IPC_REG) & NFC_IPC_CACK) == 0) {
 164                 HAL_DELAY_US(1);
 165                 if (loops-- < 0) {
 166                         diag_printf("%s: Timeout waiting for IPC ready\n", __FUNCTION__);
 167                         return;
 168                 }
 169         }
 170         if (loops < max_loops) {
 171                 diag_printf("%s: NFC ready after %u loops\n",
 172                                         __FUNCTION__, MAX_LOOPS - loops);
 173                 max_loops = loops;
 174         }
 175         nfc_reg_write(val, reg);
 176         nfc_reg_write((nfc_reg_read(NFC_IPC_REG) & ~NFC_IPC_CREQ), NFC_IPC_REG);
 177 }
 178
 179 /*!
 180  * NAND flash data output operation (reading data from NAND flash)
 181  * @param buf_no    internal ram buffer number that will contain data
 182  *                  to be outputted from the NAND flash after operation done
 183  * @param mode      one of the mode defined in enum nfc_output_mode
 184  * @param ecc_en    1 - ecc enabled; 0 - ecc disabled
 185  */
 186 static void NFC_DATA_OUTPUT(enum nfc_internal_buf buf_no, enum nfc_output_mode mode,
 187                                                         int ecc_en)
 188 {
 189         u32 v = nfc_reg_read(NFC_FLASH_CONFIG2_REG);
 190
 191         if ((v & NFC_FLASH_CONFIG2_ECC_EN) != 0 && ecc_en == 0) {
 192                 write_nfc_ip_reg(v & ~NFC_FLASH_CONFIG2_ECC_EN, NFC_FLASH_CONFIG2_REG);
 193         }
 194         if ((v & NFC_FLASH_CONFIG2_ECC_EN) == 0 && ecc_en != 0) {
 195                 write_nfc_ip_reg(v | NFC_FLASH_CONFIG2_ECC_EN, NFC_FLASH_CONFIG2_REG);
 196         }
 197
 198         v = nfc_reg_read(NAND_CONFIGURATION1_REG);
 199
 200         if (mode == FDO_SPARE_ONLY) {
 201                 v = (v & ~0x71) | buf_no | NAND_CONFIGURATION1_SP_EN;
 202         } else {
 203                 v = (v & ~0x71) | buf_no;
 204         }
 205
 206         nfc_reg_write(v, NAND_CONFIGURATION1_REG);
 207
 208         nfc_reg_write(mode & 0xFF, NAND_LAUNCH_REG);
 209         wait_op_done();
 210 }
 211
 212 static void NFC_CMD_INPUT(u32 cmd)
 213 {
 214         nfc_reg_write(cmd & 0xFFFF, NAND_CMD_REG);
 215         nfc_reg_write(NAND_LAUNCH_FCMD, NAND_LAUNCH_REG);
 216         wait_op_done();
 217 }
 218
 219 static void NFC_SET_NFC_ACTIVE_CS(u32 cs_line)
 220 {
 221         u32 v;
 222
 223         v = nfc_reg_read(NAND_CONFIGURATION1_REG) & ~0x7071;
 224         v |= (cs_line << 12);
 225         nfc_reg_write(v, NAND_CONFIGURATION1_REG);
 226 }
 227
 228 #ifdef IMX51_TO_2
 229 static inline u16 NFC_STATUS_READ(void)
 230 {
 231         u16 val = nfc_reg_read(NAND_STATUS_SUM_REG);
 232
 233         if (val != 0) {
 234                 diag_printf("NFC STATUS: %04x\n", val);
 235         }
 236         return val;
 237 }
 238 #else
 239 static inline u16 NFC_STATUS_READ(void)
 240 {
 241         u32 status;
 242         int i;
 243         u16 status_sum = 0;
 244
 245         /* Cannot rely on STATUS_SUM register due to errata */
 246         for (i = 0; i < num_of_nand_chips; i++) {
 247                 NFC_SET_NFC_ACTIVE_CS(i);
 248                 do {
 249                         nfc_reg_write(NAND_LAUNCH_AUTO_STAT, NAND_LAUNCH_REG);
 250                         status = (nfc_reg_read(NAND_CONFIGURATION1_REG) & 0x00FF0000) >> 16;
 251                 } while ((status & 0x40) == 0); // make sure I/O 6 == 1
 252                 /* Get Pass/Fail status */
 253                 status = (nfc_reg_read(NAND_CONFIGURATION1_REG) >> 16) & 0x1;
 254                 status_sum |= (status << i);
 255         }
 256         diag_printf("NFC TO2 STATUS: %04x\n", status_sum);
 257         return status_sum;
 258 }
 259 #endif
 260
 261 /* This function uses a global variable for the page size. It shouldn't be a big
 262  * problem since we don't expect mixed page size nand flash parts on the same IC.
 263  * Note for address 0, it will always be correct regardless the page size. So for
 264  * ID read, it doesn't need to have the correct page size global variable first.
 265  */
 266 static void start_nfc_addr_ops(u32 ops, u32 pg_no, u16 pg_off, u32 is_erase, u32 cs_line, u32 num_of_chips)
 267 {
 268         u32 add0, add8, page_number;
 269         int num_of_bits[] = {0, 0, 1, 0, 2, 0, 0, 0, 3, 0, 0, 0, 0, 0, 0, 0, 4};
 270
 271         if (ops == FLASH_Read_ID) {
 272                 // issue addr cycle
 273                 nfc_reg_write(0x0, NAND_ADD0_REG + (4 * cs_line));
 274                 nfc_reg_write(NAND_LAUNCH_FADD, NAND_LAUNCH_REG);
 275                 wait_op_done();
 276                 return;
 277         }
 278
 279         if (num_of_chips >  1) {
 280                 page_number = (pg_no << num_of_bits[num_of_chips]) | (cs_line & (num_of_chips - 1));
 281         } else {
 282                 page_number = pg_no;
 283         }
 284         if (is_erase) {
 285                 add0 = page_number;
 286                 add8 = 0;
 287         } else {
 288                 // for both read and write
 289                 if (g_is_2k_page || g_is_4k_page) {
 290                         // the first two addr cycles are for column addr. Page number starts
 291                         // from the 3rd addr cycle.
 292                         add0 = pg_off | (page_number << 16);
 293                         add8 = page_number >> 16;
 294                 } else {
 295                         // For 512B page, the first addr cycle is for column addr. Page number
 296                         // starts from the 2nd addr cycle.
 297                         add0 = (pg_off & 0xFF) | (page_number << 8);
 298                         add8 = page_number >> 24;
 299                 }
 300         }
 301         nfc_reg_write(add0, NAND_ADD0_REG);
 302         nfc_reg_write(add8, NAND_ADD8_REG);
 303 }
 304
 305 /*!
 306  * The NFC has to be preset before performing any operation
 307  */
 308 static void NFC_PRESET(u32 max_block_count)
 309 {
 310         // not needed. It is done in plf_hardware_init()
 311 }
 312 #endif // _MXC_NFC_V3_H_