2 * (C) Copyright 2006 Detlev Zundel, dzu@denx.de
4 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
6 * See file CREDITS for list of people who contributed to this
9 * This program is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU General Public License as
11 * published by the Free Software Foundation; either version 2 of
12 * the License, or (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
30 * Memory Controller Using
32 * CS0 - Flash memory (0x40000000)
33 * CS3 - SDRAM (0x00000000}
36 /* ------------------------------------------------------------------------- */
38 #define _not_used_ 0xffffffff
40 const uint sdram_table[] = {
41 /* single read. (offset 0 in upm RAM) */
42 0x1f07fc04, 0xeeaefc04, 0x11adfc04, 0xefbbbc00,
45 /* MRS initialization (offset 5) */
47 0x1ff77c34, 0xefeabc34, 0x1fb57c35,
49 /* burst read. (offset 8 in upm RAM) */
50 0x1f07fc04, 0xeeaefc04, 0x10adfc04, 0xf0affc00,
51 0xf0affc00, 0xf1affc00, 0xefbbbc00, 0x1ff77c47,
52 _not_used_, _not_used_, _not_used_, _not_used_,
53 _not_used_, _not_used_, _not_used_, _not_used_,
55 /* single write. (offset 18 in upm RAM) */
56 0x1f27fc04, 0xeeaebc00, 0x01b93c04, 0x1ff77c47,
57 _not_used_, _not_used_, _not_used_, _not_used_,
59 /* burst write. (offset 20 in upm RAM) */
60 0x1f07fc04, 0xeeaebc00, 0x10ad7c00, 0xf0affc00,
61 0xf0affc00, 0xe1bbbc04, 0x1ff77c47, _not_used_,
62 _not_used_, _not_used_, _not_used_, _not_used_,
63 _not_used_, _not_used_, _not_used_, _not_used_,
65 /* refresh. (offset 30 in upm RAM) */
66 0x1ff5fc84, 0xfffffc04, 0xfffffc04, 0xfffffc04,
67 0xfffffc84, 0xfffffc07, _not_used_, _not_used_,
68 _not_used_, _not_used_, _not_used_, _not_used_,
70 /* exception. (offset 3c in upm RAM) */
71 0x7ffffc07, _not_used_, _not_used_, _not_used_
74 const uint nand_flash_table[] = {
75 /* single read. (offset 0 in upm RAM) */
76 0x0ff3fc04, 0x0ff3fc04, 0x0ff3fc04, 0x0ffffc04,
77 0xfffffc00, 0xfffffc05, 0xfffffc05, 0xfffffc05,
79 /* burst read. (offset 8 in upm RAM) */
80 0xffffcc05, 0xffffcc05, 0xffffcc05, 0xffffcc05,
81 0xffffcc05, 0xffffcc05, 0xffffcc05, 0xffffcc05,
82 0xffffcc05, 0xffffcc05, 0xffffcc05, 0xffffcc05,
83 0xffffcc05, 0xffffcc05, 0xffffcc05, 0xffffcc05,
85 /* single write. (offset 18 in upm RAM) */
86 0x00fffc04, 0x00fffc04, 0x00fffc04, 0x0ffffc04,
87 0x0ffffc84, 0x0ffffc84, 0xfffffc00, 0xfffffc05,
89 /* burst write. (offset 20 in upm RAM) */
90 0xffffcc05, 0xffffcc05, 0xffffcc05, 0xffffcc05,
91 0xffffcc05, 0xffffcc05, 0xffffcc05, 0xffffcc05,
92 0xffffcc05, 0xffffcc05, 0xffffcc05, 0xffffcc05,
93 0xffffcc05, 0xffffcc05, 0xffffcc05, 0xffffcc05,
95 /* refresh. (offset 30 in upm RAM) */
96 0xffffcc05, 0xffffcc05, 0xffffcc05, 0xffffcc05,
97 0xffffcc05, 0xffffcc05, 0xffffcc05, 0xffffcc05,
98 0xffffcc05, 0xffffcc05, 0xffffcc05, 0xffffcc05,
100 /* exception. (offset 3c in upm RAM) */
101 0xffffcc05, 0xffffcc05, 0xffffcc05, 0xffffcc05
104 /* ------------------------------------------------------------------------- */
107 * Check Board Identity:
110 int checkboard (void)
112 #if !defined(CONFIG_CP850)
113 puts ("Board: NC650");
115 puts ("Board: CP850");
117 #if defined(CONFIG_IDS852_REV1)
118 puts (" with IDS852 rev 1 module\n");
119 #elif defined(CONFIG_IDS852_REV2)
120 puts (" with IDS852 rev 2 module\n");
125 /* ------------------------------------------------------------------------- */
127 static long int dram_size (long int, long int *, long int);
129 /* ------------------------------------------------------------------------- */
131 long int initdram (int board_type)
133 volatile immap_t *immap = (immap_t *) CFG_IMMR;
134 volatile memctl8xx_t *memctl = &immap->im_memctl;
135 long int size8, size9;
136 long int size_b0 = 0;
139 upmconfig (UPMA, (uint *) sdram_table,
140 sizeof (sdram_table) / sizeof (uint));
143 * Preliminary prescaler for refresh (depends on number of
144 * banks): This value is selected for four cycles every 62.4 us
145 * with two SDRAM banks or four cycles every 31.2 us with one
146 * bank. It will be adjusted after memory sizing.
148 memctl->memc_mptpr = CFG_MPTPR_2BK_8K;
150 memctl->memc_mar = 0x00000088;
153 * Map controller bank 1 to the SDRAM bank at
154 * preliminary address - these have to be modified after the
155 * SDRAM size has been determined.
157 memctl->memc_or3 = CFG_OR3_PRELIM;
158 memctl->memc_br3 = CFG_BR3_PRELIM;
160 memctl->memc_mamr = CFG_MAMR_8COL & (~(MAMR_PTAE)); /* no refresh yet */
164 /* perform SDRAM initializsation sequence */
166 memctl->memc_mcr = 0x80006105; /* SDRAM bank 0 */
168 memctl->memc_mcr = 0x80006230; /* SDRAM bank 0 - execute twice */
171 memctl->memc_mamr |= MAMR_PTAE; /* enable refresh */
176 * Check Bank 0 Memory Size for re-configuration
180 size8 = dram_size (CFG_MAMR_8COL, (ulong *) SDRAM_BASE3_PRELIM,
188 size9 = dram_size (CFG_MAMR_9COL, (ulong *) SDRAM_BASE3_PRELIM,
197 memctl->memc_mamr = CFG_MAMR_8COL;
202 * Adjust refresh rate depending on SDRAM type, both banks.
203 * For types > 128 MBit leave it at the current (fast) rate
205 if ((size_b0 < 0x02000000)) {
206 /* reduce to 15.6 us (62.4 us / quad) */
207 memctl->memc_mptpr = CFG_MPTPR_2BK_4K;
215 memctl->memc_or3 = ((-size_b0) & 0xFFFF0000) | CFG_OR_TIMING_SDRAM;
216 memctl->memc_br3 = (CFG_SDRAM_BASE & BR_BA_MSK) | BR_MS_UPMA | BR_V;
218 /* adjust refresh rate depending on SDRAM type, one bank */
219 reg = memctl->memc_mptpr;
220 reg >>= 1; /* reduce to CFG_MPTPR_1BK_8K / _4K */
221 memctl->memc_mptpr = reg;
225 /* Configure UPMB for NAND flash access */
226 upmconfig (UPMB, (uint *) nand_flash_table,
227 sizeof (nand_flash_table) / sizeof (uint));
229 memctl->memc_mbmr = CFG_MBMR_NAND;
234 /* ------------------------------------------------------------------------- */
237 * Check memory range for valid RAM. A simple memory test determines
238 * the actually available RAM size between addresses `base' and
239 * `base + maxsize'. Some (not all) hardware errors are detected:
240 * - short between address lines
241 * - short between data lines
244 static long int dram_size (long int mamr_value, long int *base, long int maxsize)
246 volatile immap_t *immap = (immap_t *) CFG_IMMR;
247 volatile memctl8xx_t *memctl = &immap->im_memctl;
249 memctl->memc_mamr = mamr_value;
251 return (get_ram_size(base, maxsize));
255 #if defined(CONFIG_CP850)
257 #define DPRAM_VARNAME "KP850DIP"
258 #define PARAM_ADDR 0x7C0
259 #define NAME_ADDR 0x7F8
260 #define BOARD_NAME "KP01"
261 #define DEFAULT_LB "241111"
263 int misc_init_r(void)
270 First byte in CPLD read address space signals compatibility mode
274 pParam = (char*)(CFG_CPLD_BASE);
278 if ( iCompatMode != 0) {
280 In KP852 compatibility mode we have to write to
281 DPRAM as early as possible the binary coded
282 line config and board name.
283 The line config is derived from the environment
284 variable DPRAM_VARNAME by converting from ASCII
285 to binary per character.
287 if ( (envlb = getenv ( DPRAM_VARNAME )) == 0) {
288 setenv( DPRAM_VARNAME, DEFAULT_LB);
293 printf("Mode: KP852(LB=%s)\n", envlb);
296 pParam = (char*)(DPRAM_BASE_ADDR + PARAM_ADDR);
298 *(pParam++) = *(envlb++) - '0';
303 pParam = (char*)(DPRAM_BASE_ADDR + NAME_ADDR);
304 strcpy( pParam, BOARD_NAME);
306 puts("Mode: CP850\n");