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wdenkf8cac652002-08-26 22:36:39 +00001/*
2 * (C) Copyright 2000
3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
4 * Ulrich Lutz, Speech Design GmbH, ulutz@datalab.de.
5 *
6 * See file CREDITS for list of people who contributed to this
7 * project.
8 *
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.
13 *
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.
18 *
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,
22 * MA 02111-1307 USA
23 */
24
25#include <common.h>
26#include <mpc8xx.h>
27#include <commproc.h>
28
29/* ------------------------------------------------------------------------- */
30
31static long int dram_size (long int, long int *, long int);
32
33/* ------------------------------------------------------------------------- */
34
35#define _NOT_USED_ 0xFFFFFFFF
36
37const uint sharc_table[] =
38{
39 /*
40 * Single Read. (Offset 0 in UPM RAM)
41 */
42 0x0FF3FC04, 0x0FF3EC00, 0x7FFFEC04, 0xFFFFEC04,
43 0xFFFFEC05, /* last */
44 _NOT_USED_, _NOT_USED_, _NOT_USED_,
45 /*
46 * Burst Read. (Offset 8 in UPM RAM)
47 */
48 /* last */
49 _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
50 _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
51 _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
52 _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
53 /*
54 * Single Write. (Offset 18 in UPM RAM)
55 */
56 0x0FAFFC04, 0x0FAFEC00, 0x7FFFEC04, 0xFFFFEC04,
57 0xFFFFEC05, /* last */
58 _NOT_USED_, _NOT_USED_, _NOT_USED_,
59 /*
60 * Burst Write. (Offset 20 in UPM RAM)
61 */
62 /* last */
63 _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
64 _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
65 _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
66 _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
67 /*
68 * Refresh (Offset 30 in UPM RAM)
69 */
70 /* last */
71 _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
72 _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
73 _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
74 /*
75 * Exception. (Offset 3c in UPM RAM)
76 */
77 0x7FFFFC07, /* last */
78 _NOT_USED_, _NOT_USED_, _NOT_USED_,
79};
80
81
82const uint sdram_table[] =
83{
84 /*
85 * Single Read. (Offset 0 in UPM RAM)
86 */
87 0x1F07FC04, 0xEEAEFC04, 0x11ADFC04, 0xEFBBBC00,
88 0x1FF77C47, /* last */
89 /*
90 * SDRAM Initialization (offset 5 in UPM RAM)
91 *
92 * This is no UPM entry point. The following definition uses
93 * the remaining space to establish an initialization
94 * sequence, which is executed by a RUN command.
95 *
96 */
97 0x1FF77C35, 0xEFEABC34, 0x1FB57C35, /* last */
98 /*
99 * Burst Read. (Offset 8 in UPM RAM)
100 */
101 0x1F07FC04, 0xEEAEFC04, 0x10ADFC04, 0xF0AFFC00,
102 0xF0AFFC00, 0xF1AFFC00, 0xEFBBBC00, 0x1FF77C47, /* last */
103 _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
104 _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
105 /*
106 * Single Write. (Offset 18 in UPM RAM)
107 */
108 0x1F27FC04, 0xEEAEBC00, 0x01B93C04, 0x1FF77C47, /* last */
109 _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
110 /*
111 * Burst Write. (Offset 20 in UPM RAM)
112 */
113 0x1F07FC04, 0xEEAEBC00, 0x10AD7C00, 0xF0AFFC00,
114 0xF0AFFC00, 0xE1BBBC04, 0x1FF77C47, /* last */
115 _NOT_USED_,
116 _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
117 _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
118 /*
119 * Refresh (Offset 30 in UPM RAM)
120 */
121 0x1FF5FC84, 0xFFFFFC04, 0xFFFFFC04, 0xFFFFFC04,
122 0xFFFFFC84, 0xFFFFFC07, /* last */
123 _NOT_USED_, _NOT_USED_,
124 _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
125 /*
126 * Exception. (Offset 3c in UPM RAM)
127 */
128 0x7FFFFC07, /* last */
129 _NOT_USED_, _NOT_USED_, _NOT_USED_,
130};
131
132/* ------------------------------------------------------------------------- */
133
134
135/*
136 * Check Board Identity:
137 *
138 */
139
140int checkboard (void)
141{
142 puts ("Board: SPD823TS\n");
143 return (0);
144}
145
146/* ------------------------------------------------------------------------- */
147
148long int
149initdram (int board_type)
150{
151 volatile immap_t *immap = (immap_t *)CFG_IMMR;
152 volatile memctl8xx_t *memctl = &immap->im_memctl;
153 long int size_b0;
154
155#if 0
156 /*
157 * Map controller bank 2 to the SRAM bank at preliminary address.
158 */
159 memctl->memc_or2 = CFG_OR2;
160 memctl->memc_br2 = CFG_BR2;
161#endif
162
163 /*
164 * Map controller bank 4 to the PER8 bank.
165 */
166 memctl->memc_or4 = CFG_OR4;
167 memctl->memc_br4 = CFG_BR4;
168
169#if 0
170 /* Configure SHARC at UMA */
171 upmconfig(UPMA, (uint *)sharc_table, sizeof(sharc_table)/sizeof(uint));
172 /* Map controller bank 5 to the SHARC */
173 memctl->memc_or5 = CFG_OR5;
174 memctl->memc_br5 = CFG_BR5;
175#endif
176
177 memctl->memc_mamr = 0x00001000;
178
179 /* Configure SDRAM at UMB */
180 upmconfig(UPMB, (uint *)sdram_table, sizeof(sdram_table)/sizeof(uint));
181
182 memctl->memc_mptpr = CFG_MPTPR_1BK_8K;
183
184 memctl->memc_mar = 0x00000088;
185
186 /*
187 * Map controller bank 3 to the SDRAM bank at preliminary address.
188 */
189 memctl->memc_or3 = CFG_OR3_PRELIM;
190 memctl->memc_br3 = CFG_BR3_PRELIM;
191
192 memctl->memc_mbmr = CFG_MBMR_8COL; /* refresh not enabled yet */
193
194 udelay(200);
195 memctl->memc_mcr = 0x80806105;
196 udelay(1);
197 memctl->memc_mcr = 0x80806130;
198 udelay(1);
199 memctl->memc_mcr = 0x80806130;
200 udelay(1);
201 memctl->memc_mcr = 0x80806106;
202
203 memctl->memc_mbmr |= MAMR_PTBE; /* refresh enabled */
204
205 /*
206 * Check Bank 0 Memory Size for re-configuration
207 */
208 size_b0 = dram_size (CFG_MBMR_8COL, (ulong *)SDRAM_BASE3_PRELIM, SDRAM_MAX_SIZE);
209
210 memctl->memc_mbmr = CFG_MBMR_8COL | MAMR_PTBE;
211
212 return (size_b0);
213}
214
215/* ------------------------------------------------------------------------- */
216
217/*
218 * Check memory range for valid RAM. A simple memory test determines
219 * the actually available RAM size between addresses `base' and
220 * `base + maxsize'. Some (not all) hardware errors are detected:
221 * - short between address lines
222 * - short between data lines
223 */
224
225static long int dram_size (long int mamr_value, long int *base, long int maxsize)
226{
227 volatile immap_t *immap = (immap_t *)CFG_IMMR;
228 volatile memctl8xx_t *memctl = &immap->im_memctl;
229 volatile long int *addr;
230 ulong cnt, val;
231 ulong save[32]; /* to make test non-destructive */
232 unsigned char i = 0;
233
234 memctl->memc_mbmr = mamr_value;
235
236 for (cnt = maxsize/sizeof(long); cnt > 0; cnt >>= 1) {
237 addr = base + cnt; /* pointer arith! */
238
239 save[i++] = *addr;
240 *addr = ~cnt;
241 }
242
243 /* write 0 to base address */
244 addr = base;
245 save[i] = *addr;
246 *addr = 0;
247
248 /* check at base address */
249 if ((val = *addr) != 0) {
250 *addr = save[i];
251 return (0);
252 }
253
254 for (cnt = 1; cnt <= maxsize/sizeof(long); cnt <<= 1) {
255 addr = base + cnt; /* pointer arith! */
256
257 val = *addr;
258 *addr = save[--i];
259
260 if (val != (~cnt)) {
261 return (cnt * sizeof(long));
262 }
263 }
264 return (maxsize);
265}
266
267/* ------------------------------------------------------------------------- */
268
269void reset_phy(void)
270{
271 immap_t *immr = (immap_t *)CFG_IMMR;
272 ushort sreg;
273
274 /* Configure extra port pins for NS DP83843 PHY */
275 immr->im_ioport.iop_papar &= ~(PA_ENET_MDC | PA_ENET_MDIO);
276
277 sreg = immr->im_ioport.iop_padir;
278 sreg |= PA_ENET_MDC; /* Mgmt. Data Clock is Output */
279 sreg &= ~(PA_ENET_MDIO); /* Mgmt. Data I/O is bidirect. => Input */
280 immr->im_ioport.iop_padir = sreg;
281
282 immr->im_ioport.iop_padat &= ~(PA_ENET_MDC); /* set MDC = 0 */
283
284 /*
285 * RESET in implemented by a positive pulse of at least 1 us
286 * at the reset pin.
287 *
288 * Configure RESET pins for NS DP83843 PHY, and RESET chip.
289 *
290 * Note: The RESET pin is high active, but there is an
291 * inverter on the SPD823TS board...
292 */
293 immr->im_ioport.iop_pcpar &= ~(PC_ENET_RESET);
294 immr->im_ioport.iop_pcdir |= PC_ENET_RESET;
295 /* assert RESET signal of PHY */
296 immr->im_ioport.iop_pcdat &= ~(PC_ENET_RESET);
297 udelay (10);
298 /* de-assert RESET signal of PHY */
299 immr->im_ioport.iop_pcdat |= PC_ENET_RESET;
300 udelay (10);
301}
302
303/* ------------------------------------------------------------------------- */
304
305void ide_set_reset(int on)
306{
307 volatile immap_t *immr = (immap_t *)CFG_IMMR;
308
309 /*
310 * Configure PC for IDE Reset Pin
311 */
312 if (on) { /* assert RESET */
313 immr->im_ioport.iop_pcdat &= ~(CFG_PC_IDE_RESET);
314 } else { /* release RESET */
315 immr->im_ioport.iop_pcdat |= CFG_PC_IDE_RESET;
316 }
317
318 /* program port pin as GPIO output */
319 immr->im_ioport.iop_pcpar &= ~(CFG_PC_IDE_RESET);
320 immr->im_ioport.iop_pcso &= ~(CFG_PC_IDE_RESET);
321 immr->im_ioport.iop_pcdir |= CFG_PC_IDE_RESET;
322}
323
324/* ------------------------------------------------------------------------- */