3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
5 * See file CREDITS for list of people who contributed to this
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License as
10 * published by the Free Software Foundation; either version 2 of
11 * the License, or (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
27 DECLARE_GLOBAL_DATA_PTR;
29 /* ------------------------------------------------------------------------- */
31 static long int dram_size (long int, long int *, long int);
32 static void read_hw_vers (void);
34 /* ------------------------------------------------------------------------- */
36 #define _NOT_USED_ 0xFFFFFFFF
38 const uint sdram_table[] = {
40 /* single read (offset 0x00 in upm ram) */
42 0xEECEFC24, 0x100DFC24, 0xE02FBC04, 0x01AA7C04,
43 0x1FB5FC00, 0xFFFFFC05, _NOT_USED_, _NOT_USED_,
45 /* burst read (offset 0x08 in upm ram) */
47 0xEECEFC24, 0x100DFC24, 0xE0FFBC04, 0x10FF7C04,
48 0xF0FFFC00, 0xF0FFFC00, 0xF0FFFC00, 0xFFFFFC00,
49 0xFFFFFC05, _NOT_USED_, _NOT_USED_, _NOT_USED_,
50 _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
52 /* single write (offset 0x18 in upm ram) */
54 0xEECEFC24, 0x100DFC24, 0xE02BBC04, 0x01A27C00,
55 0xEFAAFC04, 0x1FB5FC05, _NOT_USED_, _NOT_USED_,
57 /* burst write (offset 0x20 in upm ram) */
59 0xEECEFC24, 0x103DFC24, 0xE0FBBC00, 0x10F77C00,
60 0xF0FFFC00, 0xF0FFFC00, 0xF0FFFC04, 0xFFFFFC05,
62 /* init part1 (offset 0x28 in upm ram) */
64 0xEFFAFC3C, 0x1FF4FC34, 0xEFFCBC34, 0x1FFC3C34,
65 0xFFFC3C35, _NOT_USED_, _NOT_USED_, _NOT_USED_,
67 /* refresh (offset 0x30 in upm ram) */
69 0xEFFEBC0C, 0x1FFD7C04, 0xFFFFFC04, 0xFFFFFC05,
71 /* init part2 (offset 0x34 in upm ram) */
73 0xFFFEBC04, 0xEFFC3CB4, 0x1FFC3C34, 0xFFFC3C34,
74 0xFFFC3C34, 0xEFE83CB4, 0x1FB57C35, _NOT_USED_,
76 /* exception (offset 0x3C in upm ram) */
78 0xFFFFFC05, _NOT_USED_, _NOT_USED_, _NOT_USED_,
82 /* ------------------------------------------------------------------------- */
86 * Check Board Identity:
88 * Test ETX ID string (ETX_xxx...)
95 char *s = getenv ("serial#");
101 gd->board_type = 0; /* 0 = 2SDRAM-Device */
103 gd->board_type = 1; /* 1 = 1SDRAM-Device */
106 if (!s || strncmp (s, "ETX_", 4)) {
107 puts ("### No HW ID - assuming ETX_094\n");
112 for (e = s; *e; ++e) {
126 /* ------------------------------------------------------------------------- */
128 long int initdram (int board_type)
130 volatile immap_t *immap = (immap_t *) CFG_IMMR;
131 volatile memctl8xx_t *memctl = &immap->im_memctl;
132 long int size_b0, size_b1, size8, size9;
134 upmconfig (UPMA, (uint *) sdram_table,
135 sizeof (sdram_table) / sizeof (uint));
138 * Preliminary prescaler for refresh (depends on number of
139 * banks): This value is selected for four cycles every 62.4 us
140 * with two SDRAM banks or four cycles every 31.2 us with one
141 * bank. It will be adjusted after memory sizing.
143 memctl->memc_mptpr = CFG_MPTPR_1BK_4K; /* MPTPR_PTP_DIV32 0x0200 */
145 /* A3(SDRAM)=0 => Bursttype = Sequential
146 * A2-A0(SDRAM)=010 => Burst length = 4
147 * A4-A6(SDRAM)=010 => CasLat=2
149 memctl->memc_mar = 0x00000088;
152 * Map controller banks 2 and 3 to the SDRAM banks 2 and 3 at
153 * preliminary addresses - these have to be modified after the
154 * SDRAM size has been determined.
156 memctl->memc_or2 = CFG_OR2_PRELIM;
157 memctl->memc_br2 = CFG_BR2_PRELIM;
159 if (board_type == 0) { /* "L" type boards have only one bank SDRAM */
160 memctl->memc_or3 = CFG_OR3_PRELIM;
161 memctl->memc_br3 = CFG_BR3_PRELIM;
164 memctl->memc_mamr = CFG_MAMR_8COL & (~(MAMR_PTAE)); /* no refresh yet */
168 /* perform SDRAM initializsation sequence */
170 memctl->memc_mcr = 0x80004128; /* SDRAM bank 0 (CS2) - Init Part 1 */
171 memctl->memc_mcr = 0x80004734; /* SDRAM bank 0 (CS2) - Init Part 2 */
174 if (board_type == 0) { /* "L" type boards have only one bank SDRAM */
175 memctl->memc_mcr = 0x80006128; /* SDRAM bank 1 (CS3) - Init Part 1 */
176 memctl->memc_mcr = 0x80006734; /* SDRAM bank 1 (CS3) - Init Part 2 */
180 memctl->memc_mamr |= MAMR_PTAE; /* enable refresh */
185 * Check Bank 0 Memory Size for re-configuration
189 size8 = dram_size (CFG_MAMR_8COL, (long *) SDRAM_BASE2_PRELIM,
197 size9 = dram_size (CFG_MAMR_9COL, (long *) SDRAM_BASE2_PRELIM,
200 if (size8 < size9) { /* leave configuration at 9 columns */
202 /* debug ("SDRAM Bank 0 in 9 column mode: %ld MB\n", size >> 20); */
203 } else { /* back to 8 columns */
205 memctl->memc_mamr = CFG_MAMR_8COL;
207 /* debug ("SDRAM Bank 0 in 8 column mode: %ld MB\n", size >> 20); */
210 if (board_type == 0) { /* "L" type boards have only one bank SDRAM */
212 * Check Bank 1 Memory Size
213 * use current column settings
214 * [9 column SDRAM may also be used in 8 column mode,
215 * but then only half the real size will be used.]
218 dram_size (memctl->memc_mamr, (long *) SDRAM_BASE3_PRELIM,
220 /* debug ("SDRAM Bank 1: %ld MB\n", size8 >> 20); */
228 * Adjust refresh rate depending on SDRAM type, both banks
229 * For types > 128 MBit leave it at the current (fast) rate
231 if ((size_b0 < 0x02000000) && (size_b1 < 0x02000000)) {
232 /* reduce to 15.6 us (62.4 us / quad) */
233 memctl->memc_mptpr = CFG_MPTPR_2BK_4K; /*DIV16 */
238 * Final mapping: map bigger bank first
240 if (size_b1 > size_b0) { /* SDRAM Bank 1 is bigger - map first */
242 memctl->memc_or3 = ((-size_b1) & 0xFFFF0000) | CFG_OR_TIMING_SDRAM;
244 (CFG_SDRAM_BASE & BR_BA_MSK) | BR_MS_UPMA | BR_V;
248 * Position Bank 0 immediately above Bank 1
251 ((-size_b0) & 0xFFFF0000) | CFG_OR_TIMING_SDRAM;
253 ((CFG_SDRAM_BASE & BR_BA_MSK) | BR_MS_UPMA | BR_V)
263 memctl->memc_br2 = 0;
265 /* adjust refresh rate depending on SDRAM type, one bank */
266 reg = memctl->memc_mptpr;
267 reg >>= 1; /* reduce to CFG_MPTPR_1BK_8K / _4K */
268 memctl->memc_mptpr = reg;
271 } else { /* SDRAM Bank 0 is bigger - map first */
273 memctl->memc_or2 = ((-size_b0) & 0xFFFF0000) | CFG_OR_TIMING_SDRAM;
275 (CFG_SDRAM_BASE & BR_BA_MSK) | BR_MS_UPMA | BR_V;
279 * Position Bank 1 immediately above Bank 0
282 ((-size_b1) & 0xFFFF0000) | CFG_OR_TIMING_SDRAM;
284 ((CFG_SDRAM_BASE & BR_BA_MSK) | BR_MS_UPMA | BR_V)
294 memctl->memc_br3 = 0;
296 /* adjust refresh rate depending on SDRAM type, one bank */
297 reg = memctl->memc_mptpr;
298 reg >>= 1; /* reduce to CFG_MPTPR_1BK_8K / _4K */
299 memctl->memc_mptpr = reg;
305 return (size_b0 + size_b1);
308 /* ------------------------------------------------------------------------- */
311 * Check memory range for valid RAM. A simple memory test determines
312 * the actually available RAM size between addresses `base' and
313 * `base + maxsize'. Some (not all) hardware errors are detected:
314 * - short between address lines
315 * - short between data lines
318 static long int dram_size (long int mamr_value, long int *base,
321 volatile immap_t *immap = (immap_t *) CFG_IMMR;
322 volatile memctl8xx_t *memctl = &immap->im_memctl;
324 memctl->memc_mamr = mamr_value;
326 return (get_ram_size(base, maxsize));
329 /* ------------------------------------------------------------------------- */
331 /* HW-ID Table (Bits: 2^9;2^7;2^5) */
332 #define HW_ID_0 0x0000
333 #define HW_ID_1 0x0020
334 #define HW_ID_2 0x0080
335 #define HW_ID_3 0x00a0
336 #define HW_ID_4 0x0200
337 #define HW_ID_5 0x0220
338 #define HW_ID_6 0x0280
339 #define HW_ID_7 0x02a0
343 unsigned short rd_msk = 0x02A0;
345 /* HW-ID pin-definition */
346 volatile immap_t *immr = (immap_t *) CFG_IMMR;
348 immr->im_ioport.iop_pddir &= ~(rd_msk);
349 immr->im_ioport.iop_pdpar &= ~(rd_msk);
351 /* debug printf("State of PD: %x\n",immr->im_ioport.iop_pddat); */
353 /* Check the HW-ID */
354 printf ("HW-Version: ");
355 switch (immr->im_ioport.iop_pddat & rd_msk) {
357 printf ("V0.1 - V0.3 / W97238-Q3162-A1-1-2\n");
360 printf ("V0.9 / W50037-Q1-D6-1\n");
363 printf ("NOT USED - assuming ID#2\n");
366 printf ("NOT USED - assuming ID#3\n");
369 printf ("NOT USED - assuming ID#4\n");
372 printf ("NOT USED - assuming ID#5\n");
375 printf ("NOT USED - assuming ID#6\n");
378 printf ("NOT USED - assuming ID#7\n");
381 printf ("###Error###\n");
386 /* ------------------------------------------------------------------------- */