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,
28 /* ------------------------------------------------------------------------- */
30 static long int dram_size (long int, long int *, long int);
32 /* ------------------------------------------------------------------------- */
34 #define _NOT_USED_ 0xFFFFFFFF
36 const uint sdram_table[] = {
38 * Single Read. (Offset 0 in UPMA RAM)
40 0x1f07fc04, 0xeeaefc04, 0x11adfc04, 0xefbbbc00,
41 0x1ff77c47, /* last */
43 * SDRAM Initialization (offset 5 in UPMA RAM)
45 * This is no UPM entry point. The following definition uses
46 * the remaining space to establish an initialization
47 * sequence, which is executed by a RUN command.
50 0x1ff77c34, 0xefeabc34, 0x1fb57c35, /* last */
52 * Burst Read. (Offset 8 in UPMA RAM)
54 0x1f07fc04, 0xeeaefc04, 0x10adfc04, 0xf0affc00,
55 0xf0affc00, 0xf1affc00, 0xefbbbc00, 0x1ff77c47, /* last */
56 _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
57 _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
59 * Single Write. (Offset 18 in UPMA RAM)
61 0x1f27fc04, 0xeeaebc00, 0x01b93c04, 0x1ff77c47, /* last */
62 _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
64 * Burst Write. (Offset 20 in UPMA RAM)
66 0x1f07fc04, 0xeeaebc00, 0x10ad7c00, 0xf0affc00,
67 0xf0affc00, 0xe1bbbc04, 0x1ff77c47, /* last */
69 _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
70 _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
72 * Refresh (Offset 30 in UPMA RAM)
74 0x1ff5fc84, 0xfffffc04, 0xfffffc04, 0xfffffc04,
75 0xfffffc84, 0xfffffc07, /* last */
76 _NOT_USED_, _NOT_USED_,
77 _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
79 * Exception. (Offset 3c in UPMA RAM)
81 0x7ffffc07, /* last */
82 _NOT_USED_, _NOT_USED_, _NOT_USED_,
85 /* ------------------------------------------------------------------------- */
89 * Check Board Identity:
91 * Test ID string (IP860...)
97 unsigned char buf[64];
102 i = getenv_r ("serial#", buf, sizeof (buf));
103 s = (i > 0) ? buf : NULL;
105 if (!s || strncmp (s, "IP860", 5)) {
106 puts ("### No HW ID - assuming IP860");
108 for (e = s; *e; ++e) {
123 /* ------------------------------------------------------------------------- */
125 long int initdram (int board_type)
127 volatile immap_t *immap = (immap_t *) CFG_IMMR;
128 volatile memctl8xx_t *memctl = &immap->im_memctl;
131 upmconfig (UPMA, (uint *) sdram_table,
132 sizeof (sdram_table) / sizeof (uint));
135 * Preliminary prescaler for refresh
137 memctl->memc_mptpr = 0x0400;
139 memctl->memc_mar = 0x00000088;
142 * Map controller banks 2 to the SDRAM address
144 memctl->memc_or2 = CFG_OR2;
145 memctl->memc_br2 = CFG_BR2;
147 /* IP860 boards have only one bank SDRAM */
152 /* perform SDRAM initializsation sequence */
154 memctl->memc_mamr = 0xC3804114;
155 memctl->memc_mcr = 0x80004105; /* run precharge pattern from loc 5 */
157 memctl->memc_mamr = 0xC3804118;
158 memctl->memc_mcr = 0x80004130; /* run refresh pattern 8 times */
163 * Check SDRAM Memory Size
165 size = dram_size (CFG_MAMR, (ulong *) SDRAM_BASE, SDRAM_MAX_SIZE);
169 memctl->memc_or2 = ((-size) & 0xFFFF0000) | SDRAM_TIMING;
170 memctl->memc_br2 = (CFG_SDRAM_BASE & BR_BA_MSK) | BR_MS_UPMA | BR_V;
175 * Also, map other memory to correct position
178 #if (defined(CFG_OR1) && defined(CFG_BR1_PRELIM))
179 memctl->memc_or1 = CFG_OR1;
180 memctl->memc_br1 = CFG_BR1;
183 #if defined(CFG_OR3) && defined(CFG_BR3)
184 memctl->memc_or3 = CFG_OR3;
185 memctl->memc_br3 = CFG_BR3;
188 #if defined(CFG_OR4) && defined(CFG_BR4)
189 memctl->memc_or4 = CFG_OR4;
190 memctl->memc_br4 = CFG_BR4;
193 #if defined(CFG_OR5) && defined(CFG_BR5)
194 memctl->memc_or5 = CFG_OR5;
195 memctl->memc_br5 = CFG_BR5;
198 #if defined(CFG_OR6) && defined(CFG_BR6)
199 memctl->memc_or6 = CFG_OR6;
200 memctl->memc_br6 = CFG_BR6;
203 #if defined(CFG_OR7) && defined(CFG_BR7)
204 memctl->memc_or7 = CFG_OR7;
205 memctl->memc_br7 = CFG_BR7;
211 /* ------------------------------------------------------------------------- */
214 * Check memory range for valid RAM. A simple memory test determines
215 * the actually available RAM size between addresses `base' and
216 * `base + maxsize'. Some (not all) hardware errors are detected:
217 * - short between address lines
218 * - short between data lines
221 static long int dram_size (long int mamr_value, long int *base,
224 volatile immap_t *immap = (immap_t *) CFG_IMMR;
225 volatile memctl8xx_t *memctl = &immap->im_memctl;
226 volatile long int *addr;
228 ulong save[32]; /* to make test non-destructive */
231 memctl->memc_mamr = mamr_value;
233 for (cnt = maxsize / sizeof (long); cnt > 0; cnt >>= 1) {
234 addr = base + cnt; /* pointer arith! */
240 /* write 0 to base address */
245 /* check at base address */
246 if ((val = *addr) != 0) {
251 for (cnt = 1; cnt <= maxsize / sizeof (long); cnt <<= 1) {
252 addr = base + cnt; /* pointer arith! */
258 return (cnt * sizeof (long));
264 /* ------------------------------------------------------------------------- */
266 void reset_phy (void)
268 volatile immap_t *immr = (immap_t *) CFG_IMMR;
269 ulong mask = PB_ENET_RESET | PB_ENET_JABD;
272 /* Make sure PHY is not in low-power mode */
273 immr->im_cpm.cp_pbpar &= ~(mask); /* GPIO */
274 immr->im_cpm.cp_pbodr &= ~(mask); /* active output */
276 /* Set JABD low (no JABber Disable),
277 * and RESET high (Reset PHY)
279 reg = immr->im_cpm.cp_pbdat;
280 reg = (reg & ~PB_ENET_JABD) | PB_ENET_RESET;
281 immr->im_cpm.cp_pbdat = reg;
283 /* now drive outputs */
284 immr->im_cpm.cp_pbdir |= mask; /* output */
287 * Release RESET signal
289 immr->im_cpm.cp_pbdat &= ~(PB_ENET_RESET);
293 /* ------------------------------------------------------------------------- */