board/tqc/tqm8272/nand.c

   1 /*
   2  * (C) Copyright 2008
   3  * Heiko Schocher, DENX Software Engineering, hs@denx.de.
   4  *
   5  * SPDX-License-Identifier:     GPL-2.0+
   6  */
   7
   8 #include <common.h>
   9 #include <ioports.h>
  10 #include <mpc8260.h>
  11
  12 #include "tqm8272.h"
  13
  14 /* UPM pattern for bus clock = 66.7 MHz */
  15 static const uint upmTable67[] =
  16 {
  17     /* Offset   UPM Read Single RAM array entry -> NAND Read Data */
  18     /* 0x00 */  0x0fa3f100, 0x0fa3b000, 0x0fa33100, 0x0fa33000,
  19     /* 0x04 */  0x0fa33000, 0x0fa33004, 0xfffffc01, 0xfffffc00,
  20
  21                 /* UPM Read Burst RAM array entry -> unused */
  22     /* 0x08 */  0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc00,
  23     /* 0x0C */  0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc00,
  24
  25                 /* UPM Read Burst RAM array entry -> unused */
  26     /* 0x10 */  0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc00,
  27     /* 0x14 */  0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc00,
  28
  29                 /* UPM Write Single RAM array entry -> NAND Write Data, ADDR and CMD */
  30     /* 0x18 */  0x00a3fc00, 0x00a3fc00, 0x00a3fc00, 0x00a3fc00,
  31     /* 0x1C */  0x0fa3fc00, 0x0fa3fc04, 0xfffffc01, 0xfffffc00,
  32
  33                 /* UPM Write Burst RAM array entry -> unused */
  34     /* 0x20 */  0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc00,
  35     /* 0x24 */  0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc00,
  36     /* 0x28 */  0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc00,
  37     /* 0x2C */  0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc01,
  38
  39                 /* UPM Refresh Timer RAM array entry -> unused */
  40     /* 0x30 */  0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc00,
  41     /* 0x34 */  0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc00,
  42     /* 0x38 */  0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc01,
  43
  44                 /* UPM Exception RAM array entry -> unsused */
  45     /* 0x3C */  0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc01,
  46 };
  47
  48 /* UPM pattern for bus clock = 100 MHz */
  49 static const uint upmTable100[] =
  50 {
  51     /* Offset   UPM Read Single RAM array entry -> NAND Read Data */
  52     /* 0x00 */  0x0fa3f200, 0x0fa3b000, 0x0fa33300, 0x0fa33000,
  53     /* 0x04 */  0x0fa33000, 0x0fa33004, 0xfffffc01, 0xfffffc00,
  54
  55                 /* UPM Read Burst RAM array entry -> unused */
  56     /* 0x08 */  0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc00,
  57     /* 0x0C */  0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc00,
  58
  59                 /* UPM Read Burst RAM array entry -> unused */
  60     /* 0x10 */  0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc00,
  61     /* 0x14 */  0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc00,
  62
  63                 /* UPM Write Single RAM array entry -> NAND Write Data, ADDR and CMD */
  64     /* 0x18 */  0x00a3ff00, 0x00a3fc00, 0x00a3fc00, 0x0fa3fc00,
  65     /* 0x1C */  0x0fa3fc00, 0x0fa3fc04, 0xfffffc01, 0xfffffc00,
  66
  67                 /* UPM Write Burst RAM array entry -> unused */
  68     /* 0x20 */  0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc00,
  69     /* 0x24 */  0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc00,
  70     /* 0x28 */  0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc00,
  71     /* 0x2C */  0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc01,
  72
  73                 /* UPM Refresh Timer RAM array entry -> unused */
  74     /* 0x30 */  0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc00,
  75     /* 0x34 */  0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc00,
  76     /* 0x38 */  0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc01,
  77
  78                 /* UPM Exception RAM array entry -> unsused */
  79     /* 0x3C */  0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc01,
  80 };
  81
  82 /* UPM pattern for bus clock = 133.3 MHz */
  83 static const uint upmTable133[] =
  84 {
  85     /* Offset   UPM Read Single RAM array entry -> NAND Read Data */
  86     /* 0x00 */  0x0fa3f300, 0x0fa3b000, 0x0fa33300, 0x0fa33000,
  87     /* 0x04 */  0x0fa33200, 0x0fa33004, 0xfffffc01, 0xfffffc00,
  88
  89                 /* UPM Read Burst RAM array entry -> unused */
  90     /* 0x08 */  0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc00,
  91     /* 0x0C */  0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc00,
  92
  93                 /* UPM Read Burst RAM array entry -> unused */
  94     /* 0x10 */  0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc00,
  95     /* 0x14 */  0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc00,
  96
  97                 /* UPM Write Single RAM array entry -> NAND Write Data, ADDR and CMD */
  98     /* 0x18 */  0x00a3ff00, 0x00a3fc00, 0x00a3fd00, 0x0fa3fc00,
  99     /* 0x1C */  0x0fa3fd00, 0x0fa3fc04, 0xfffffc01, 0xfffffc00,
 100
 101                 /* UPM Write Burst RAM array entry -> unused */
 102     /* 0x20 */  0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc00,
 103     /* 0x24 */  0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc00,
 104     /* 0x28 */  0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc00,
 105     /* 0x2C */  0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc01,
 106
 107                 /* UPM Refresh Timer RAM array entry -> unused */
 108     /* 0x30 */  0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc00,
 109     /* 0x34 */  0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc00,
 110     /* 0x38 */  0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc01,
 111
 112                 /* UPM Exception RAM array entry -> unsused */
 113     /* 0x3C */  0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc01,
 114 };
 115
 116 static int      chipsel = 0;
 117
 118 #if defined(CONFIG_CMD_NAND)
 119
 120 #include <nand.h>
 121 #include <linux/mtd/mtd.h>
 122
 123 static u8 hwctl = 0;
 124
 125 static void upmnand_write_byte(struct mtd_info *mtdinfo, u_char byte)
 126 {
 127         struct nand_chip *this = mtdinfo->priv;
 128         ulong base = (ulong) (this->IO_ADDR_W + chipsel * CONFIG_SYS_NAND_CS_DIST);
 129
 130         if (hwctl & 0x1) {
 131                 WRITE_NAND_UPM(byte, base, CONFIG_SYS_NAND_UPM_WRITE_CMD_OFS);
 132         } else if (hwctl & 0x2) {
 133                 WRITE_NAND_UPM(byte, base, CONFIG_SYS_NAND_UPM_WRITE_ADDR_OFS);
 134         } else {
 135                 WRITE_NAND(byte, base);
 136         }
 137 }
 138
 139 static void upmnand_hwcontrol(struct mtd_info *mtd, int cmd, unsigned int ctrl)
 140 {
 141         if (ctrl & NAND_CTRL_CHANGE) {
 142                 if ( ctrl & NAND_CLE )
 143                         hwctl |= 0x1;
 144                 else
 145                         hwctl &= ~0x1;
 146                 if ( ctrl & NAND_ALE )
 147                         hwctl |= 0x2;
 148                 else
 149                         hwctl &= ~0x2;
 150         }
 151         if (cmd != NAND_CMD_NONE)
 152                 upmnand_write_byte (mtd, cmd);
 153 }
 154
 155 static u_char upmnand_read_byte(struct mtd_info *mtdinfo)
 156 {
 157         struct nand_chip *this = mtdinfo->priv;
 158         ulong base = (ulong) (this->IO_ADDR_W + chipsel * CONFIG_SYS_NAND_CS_DIST);
 159
 160         return READ_NAND(base);
 161 }
 162
 163 static int tqm8272_dev_ready(struct mtd_info *mtdinfo)
 164 {
 165         /* constant delay (see also tR in the datasheet) */
 166         udelay(12); \
 167         return 1;
 168 }
 169
 170 #ifndef CONFIG_NAND_SPL
 171 static void tqm8272_read_buf(struct mtd_info *mtdinfo, uint8_t *buf, int len)
 172 {
 173         struct nand_chip *this = mtdinfo->priv;
 174         unsigned char *base = (unsigned char *) (this->IO_ADDR_W + chipsel * CONFIG_SYS_NAND_CS_DIST);
 175         int     i;
 176
 177         for (i = 0; i< len; i++)
 178                 buf[i] = *base;
 179 }
 180
 181 static void tqm8272_write_buf(struct mtd_info *mtdinfo, const uint8_t *buf, int len)
 182 {
 183         struct nand_chip *this = mtdinfo->priv;
 184         unsigned char *base = (unsigned char *) (this->IO_ADDR_W + chipsel * CONFIG_SYS_NAND_CS_DIST);
 185         int     i;
 186
 187         for (i = 0; i< len; i++)
 188                 *base = buf[i];
 189 }
 190
 191 static int tqm8272_verify_buf(struct mtd_info *mtdinfo, const uint8_t *buf, int len)
 192 {
 193         struct nand_chip *this = mtdinfo->priv;
 194         unsigned char *base = (unsigned char *) (this->IO_ADDR_W + chipsel * CONFIG_SYS_NAND_CS_DIST);
 195         int     i;
 196
 197         for (i = 0; i < len; i++)
 198                 if (buf[i] != *base)
 199                         return -1;
 200         return 0;
 201 }
 202 #endif /* #ifndef CONFIG_NAND_SPL */
 203
 204 void board_nand_select_device(struct nand_chip *nand, int chip)
 205 {
 206         chipsel = chip;
 207 }
 208
 209 int board_nand_init(struct nand_chip *nand)
 210 {
 211         static  int     UpmInit = 0;
 212         volatile immap_t * immr = (immap_t *)CONFIG_SYS_IMMR;
 213         volatile memctl8260_t *memctl = &immr->im_memctl;
 214
 215         if (hwinf.nand == 0) return -1;
 216
 217         /* Setup the UPM */
 218         if (UpmInit == 0) {
 219                 switch (hwinf.busclk_real) {
 220                 case 100000000:
 221                         upmconfig (UPMB, (uint *) upmTable100,
 222                            sizeof (upmTable100) / sizeof (uint));
 223                         break;
 224                 case 133333333:
 225                         upmconfig (UPMB, (uint *) upmTable133,
 226                            sizeof (upmTable133) / sizeof (uint));
 227                         break;
 228                 default:
 229                         upmconfig (UPMB, (uint *) upmTable67,
 230                            sizeof (upmTable67) / sizeof (uint));
 231                         break;
 232                 }
 233                 UpmInit = 1;
 234         }
 235
 236         /* Setup the memctrl */
 237         memctl->memc_or3 = CONFIG_SYS_NAND_OR;
 238         memctl->memc_br3 = CONFIG_SYS_NAND_BR;
 239         memctl->memc_mbmr = (MxMR_OP_NORM);
 240
 241         nand->ecc.mode = NAND_ECC_SOFT;
 242
 243         nand->cmd_ctrl   = upmnand_hwcontrol;
 244         nand->read_byte  = upmnand_read_byte;
 245         nand->dev_ready  = tqm8272_dev_ready;
 246
 247 #ifndef CONFIG_NAND_SPL
 248         nand->write_buf  = tqm8272_write_buf;
 249         nand->read_buf   = tqm8272_read_buf;
 250         nand->verify_buf = tqm8272_verify_buf;
 251 #endif
 252
 253         /*
 254          * Select required NAND chip
 255          */
 256         board_nand_select_device(nand, 0);
 257         return 0;
 258 }
 259
 260 #endif