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3bac3513 WD |
1 | /* |
2 | **===================================================================== | |
3 | ** | |
4 | ** Copyright (C) 2000, 2001, 2002, 2003 | |
5 | ** The LEOX team <team@leox.org>, http://www.leox.org | |
6 | ** | |
7 | ** LEOX.org is about the development of free hardware and software resources | |
8 | ** for system on chip. | |
9 | ** | |
10 | ** Description: U-Boot port on the LEOX's ELPT860 CPU board | |
11 | ** ~~~~~~~~~~~ | |
12 | ** | |
13 | **===================================================================== | |
14 | ** | |
15 | ** This program is free software; you can redistribute it and/or | |
16 | ** modify it under the terms of the GNU General Public License as | |
17 | ** published by the Free Software Foundation; either version 2 of | |
18 | ** the License, or (at your option) any later version. | |
19 | ** | |
20 | ** This program is distributed in the hope that it will be useful, | |
21 | ** but WITHOUT ANY WARRANTY; without even the implied warranty of | |
22 | ** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
23 | ** GNU General Public License for more details. | |
24 | ** | |
25 | ** You should have received a copy of the GNU General Public License | |
26 | ** along with this program; if not, write to the Free Software | |
27 | ** Foundation, Inc., 59 Temple Place, Suite 330, Boston, | |
28 | ** MA 02111-1307 USA | |
29 | ** | |
30 | **===================================================================== | |
31 | */ | |
32 | ||
33 | /* | |
34 | ** Note 1: In this file, you have to provide the following functions: | |
35 | ** ------ | |
c837dcb1 | 36 | ** int board_early_init_f(void) |
3bac3513 | 37 | ** int checkboard(void) |
9973e3c6 | 38 | ** phys_size_t initdram(int board_type) |
3bac3513 WD |
39 | ** called from 'board_init_f()' into 'common/board.c' |
40 | ** | |
41 | ** void reset_phy(void) | |
42 | ** called from 'board_init_r()' into 'common/board.c' | |
43 | */ | |
44 | ||
45 | #include <common.h> | |
46 | #include <mpc8xx.h> | |
47 | ||
48 | /* ------------------------------------------------------------------------- */ | |
49 | ||
50 | static long int dram_size (long int, long int *, long int); | |
51 | ||
52 | /* ------------------------------------------------------------------------- */ | |
53 | ||
54 | #define _NOT_USED_ 0xFFFFFFFF | |
55 | ||
c83bf6a2 WD |
56 | const uint init_sdram_table[] = { |
57 | /* | |
58 | * Single Read. (Offset 0 in UPMA RAM) | |
59 | */ | |
60 | 0x0FFCCC04, 0xFFFFFC04, 0x0FFC3C04, 0xFFFFFC04, | |
61 | 0xFFFFFC04, /* last */ | |
62 | /* | |
63 | * SDRAM Initialization (offset 5 in UPMA RAM) | |
64 | * | |
65 | * This is no UPM entry point. The following definition uses | |
66 | * the remaining space to establish an initialization | |
67 | * sequence, which is executed by a RUN command. | |
68 | * | |
69 | */ | |
70 | 0xFFFFFC04, 0xFFFFFC04, 0x0FFC3C04, /* last */ | |
71 | /* | |
72 | * Burst Read. (Offset 8 in UPMA RAM) | |
73 | */ | |
74 | 0xFFFFFC04, 0xFFFFFC04, 0xFFFFFC04, 0xFFFFFC04, | |
75 | 0x0FFC3C04, 0xFFFFFC04, 0xFFFFFC04, 0xFFFFFC04, | |
76 | 0xFFFFFC04, 0x0FFC3C04, 0xFFFFFC04, 0xFFFFFC04, | |
77 | 0xFFFFFC04, 0xFFFFFC04, 0x0FFC3C04, 0xFFFFFC04, /* last */ | |
78 | /* | |
79 | * Single Write. (Offset 18 in UPMA RAM) | |
80 | */ | |
81 | 0xFFFFFC04, 0xFFFFFC04, 0xFFFFFC04, 0x0FFC3C04, | |
82 | 0xFFFFFC04, 0xFFFFFC04, 0x0FFFFC04, 0xFFFFFC04, /* last */ | |
83 | /* | |
84 | * Burst Write. (Offset 20 in UPMA RAM) | |
85 | */ | |
86 | 0x0FFC3C04, 0xFFFFFC04, 0xFFFFFC04, 0xFFFFFC04, | |
87 | 0xFFFFFC04, 0x0FFC3C04, 0xFFFFFC04, 0xFFFFFC04, | |
88 | 0xFFFFFC04, 0xFFFFFC04, 0xFFFFFC34, 0x0FAC0C34, | |
89 | 0xFFFFFC05, 0xFFFFFC04, 0x0FFCFC04, 0xFFFFFC05, /* last */ | |
3bac3513 WD |
90 | }; |
91 | ||
c83bf6a2 WD |
92 | const uint sdram_table[] = { |
93 | /* | |
94 | * Single Read. (Offset 0 in UPMA RAM) | |
95 | */ | |
96 | 0x0F0FFC24, 0x0F0CFC04, 0xFF0FFC04, 0x00AF3C04, | |
97 | 0xFF0FFC00, /* last */ | |
98 | /* | |
99 | * SDRAM Initialization (offset 5 in UPMA RAM) | |
100 | * | |
101 | * This is no UPM entry point. The following definition uses | |
102 | * the remaining space to establish an initialization | |
103 | * sequence, which is executed by a RUN command. | |
104 | * | |
105 | */ | |
106 | 0x0FFCCC04, 0xFFAFFC05, 0xFFAFFC05, /* last */ | |
107 | /* | |
108 | * Burst Read. (Offset 8 in UPMA RAM) | |
109 | */ | |
110 | 0x0F0FFC24, 0x0F0CFC04, 0xFF0FFC04, 0x00AF3C04, | |
111 | 0xF00FFC00, 0xF00FFC00, 0xF00FFC00, 0xFF0FFC00, | |
112 | 0x0FFCCC04, 0xFFAFFC05, 0xFFAFFC04, 0xFFAFFC04, | |
113 | 0xFFAFFC04, 0xFFAFFC04, 0xFFAFFC04, 0xFFAFFC04, /* last */ | |
114 | /* | |
115 | * Single Write. (Offset 18 in UPMA RAM) | |
116 | */ | |
117 | 0x0F0FFC24, 0x0F0CFC04, 0xFF0FFC04, 0x00AF0C00, | |
118 | 0xFF0FFC04, 0x0FFCCC04, 0xFFAFFC05, /* last */ | |
119 | _NOT_USED_, | |
120 | /* | |
121 | * Burst Write. (Offset 20 in UPMA RAM) | |
122 | */ | |
123 | 0x0F0FFC24, 0x0F0CFC04, 0xFF0FFC00, 0x00AF0C00, | |
124 | 0xF00FFC00, 0xF00FFC00, 0xF00FFC04, 0x0FFCCC04, | |
125 | 0xFFAFFC04, 0xFFAFFC05, 0xFFAFFC04, 0xFFAFFC04, | |
126 | 0xFFAFFC04, 0xFFAFFC04, 0xFFAFFC04, 0xFFAFFC04, /* last */ | |
127 | /* | |
128 | * Refresh (Offset 30 in UPMA RAM) | |
129 | */ | |
130 | 0x0FFC3C04, 0xFFFFFC04, 0xFFFFFC04, 0xFFFFFC04, | |
131 | 0xFFFFFC05, 0xFFFFFC04, 0xFFFFFC05, _NOT_USED_, | |
132 | 0xFFAFFC04, 0xFFAFFC04, 0xFFAFFC04, 0xFFAFFC04, /* last */ | |
133 | /* | |
134 | * Exception. (Offset 3c in UPMA RAM) | |
135 | */ | |
136 | 0x0FFFFC34, 0x0FAC0C34, 0xFFFFFC05, 0xFFAFFC04, /* last */ | |
3bac3513 WD |
137 | }; |
138 | ||
139 | /* ------------------------------------------------------------------------- */ | |
140 | ||
6d0f6bcf | 141 | #define CONFIG_SYS_PC4 0x0800 |
3bac3513 | 142 | |
6d0f6bcf | 143 | #define CONFIG_SYS_DS1 CONFIG_SYS_PC4 |
3bac3513 WD |
144 | |
145 | /* | |
146 | * Very early board init code (fpga boot, etc.) | |
147 | */ | |
c837dcb1 | 148 | int board_early_init_f (void) |
3bac3513 | 149 | { |
6d0f6bcf | 150 | volatile immap_t *immr = (immap_t *) CONFIG_SYS_IMMR; |
3bac3513 | 151 | |
c83bf6a2 WD |
152 | /* |
153 | * Light up the red led on ELPT860 pcb (DS1) (PCDAT) | |
154 | */ | |
6d0f6bcf JCPV |
155 | immr->im_ioport.iop_pcdat &= ~CONFIG_SYS_DS1; /* PCDAT (DS1 = 0) */ |
156 | immr->im_ioport.iop_pcpar &= ~CONFIG_SYS_DS1; /* PCPAR (0=general purpose I/O) */ | |
157 | immr->im_ioport.iop_pcdir |= CONFIG_SYS_DS1; /* PCDIR (I/O: 0=input, 1=output) */ | |
3bac3513 | 158 | |
c83bf6a2 | 159 | return (0); /* success */ |
3bac3513 WD |
160 | } |
161 | ||
162 | /* | |
163 | * Check Board Identity: | |
164 | * | |
165 | * Test ELPT860 ID string | |
166 | * | |
167 | * Return 1 if no second DRAM bank, otherwise returns 0 | |
168 | */ | |
169 | ||
c83bf6a2 | 170 | int checkboard (void) |
3bac3513 | 171 | { |
77ddac94 | 172 | char *s = getenv ("serial#"); |
3bac3513 | 173 | |
c83bf6a2 WD |
174 | if (!s || strncmp (s, "ELPT860", 7)) |
175 | printf ("### No HW ID - assuming ELPT860\n"); | |
8bde7f77 | 176 | |
c83bf6a2 | 177 | return (0); /* success */ |
3bac3513 WD |
178 | } |
179 | ||
180 | /* ------------------------------------------------------------------------- */ | |
181 | ||
9973e3c6 | 182 | phys_size_t initdram (int board_type) |
3bac3513 | 183 | { |
6d0f6bcf | 184 | volatile immap_t *immap = (immap_t *) CONFIG_SYS_IMMR; |
c83bf6a2 WD |
185 | volatile memctl8xx_t *memctl = &immap->im_memctl; |
186 | long int size8, size9; | |
187 | long int size_b0 = 0; | |
188 | ||
189 | /* | |
190 | * This sequence initializes SDRAM chips on ELPT860 board | |
191 | */ | |
192 | upmconfig (UPMA, (uint *) init_sdram_table, | |
193 | sizeof (init_sdram_table) / sizeof (uint)); | |
194 | ||
195 | memctl->memc_mptpr = 0x0200; | |
196 | memctl->memc_mamr = 0x18002111; | |
197 | ||
198 | memctl->memc_mar = 0x00000088; | |
199 | memctl->memc_mcr = 0x80002000; /* CS1: SDRAM bank 0 */ | |
200 | ||
201 | upmconfig (UPMA, (uint *) sdram_table, | |
202 | sizeof (sdram_table) / sizeof (uint)); | |
203 | ||
204 | /* | |
205 | * Preliminary prescaler for refresh (depends on number of | |
206 | * banks): This value is selected for four cycles every 62.4 us | |
207 | * with two SDRAM banks or four cycles every 31.2 us with one | |
208 | * bank. It will be adjusted after memory sizing. | |
209 | */ | |
6d0f6bcf | 210 | memctl->memc_mptpr = CONFIG_SYS_MPTPR_2BK_8K; |
c83bf6a2 WD |
211 | |
212 | /* | |
213 | * The following value is used as an address (i.e. opcode) for | |
214 | * the LOAD MODE REGISTER COMMAND during SDRAM initialisation. If | |
215 | * the port size is 32bit the SDRAM does NOT "see" the lower two | |
216 | * address lines, i.e. mar=0x00000088 -> opcode=0x00000022 for | |
217 | * MICRON SDRAMs: | |
218 | * -> 0 00 010 0 010 | |
219 | * | | | | +- Burst Length = 4 | |
220 | * | | | +----- Burst Type = Sequential | |
221 | * | | +------- CAS Latency = 2 | |
222 | * | +----------- Operating Mode = Standard | |
223 | * +-------------- Write Burst Mode = Programmed Burst Length | |
224 | */ | |
225 | memctl->memc_mar = 0x00000088; | |
226 | ||
227 | /* | |
228 | * Map controller banks 2 and 3 to the SDRAM banks 2 and 3 at | |
229 | * preliminary addresses - these have to be modified after the | |
230 | * SDRAM size has been determined. | |
231 | */ | |
6d0f6bcf JCPV |
232 | memctl->memc_or1 = CONFIG_SYS_OR1_PRELIM; |
233 | memctl->memc_br1 = CONFIG_SYS_BR1_PRELIM; | |
c83bf6a2 | 234 | |
6d0f6bcf | 235 | memctl->memc_mamr = CONFIG_SYS_MAMR_8COL & (~(MAMR_PTAE)); /* no refresh yet */ |
c83bf6a2 WD |
236 | |
237 | udelay (200); | |
238 | ||
239 | /* perform SDRAM initializsation sequence */ | |
240 | ||
241 | memctl->memc_mcr = 0x80002105; /* CS1: SDRAM bank 0 */ | |
242 | udelay (1); | |
243 | memctl->memc_mcr = 0x80002230; /* CS1: SDRAM bank 0 - execute twice */ | |
244 | udelay (1); | |
245 | ||
246 | memctl->memc_mamr |= MAMR_PTAE; /* enable refresh */ | |
247 | ||
248 | udelay (1000); | |
249 | ||
250 | /* | |
251 | * Check Bank 0 Memory Size for re-configuration | |
252 | * | |
253 | * try 8 column mode | |
254 | */ | |
6d0f6bcf | 255 | size8 = dram_size (CONFIG_SYS_MAMR_8COL, |
77ddac94 | 256 | SDRAM_BASE1_PRELIM, SDRAM_MAX_SIZE); |
c83bf6a2 | 257 | |
3bac3513 | 258 | udelay (1000); |
3bac3513 | 259 | |
c83bf6a2 WD |
260 | /* |
261 | * try 9 column mode | |
262 | */ | |
6d0f6bcf | 263 | size9 = dram_size (CONFIG_SYS_MAMR_9COL, |
77ddac94 | 264 | SDRAM_BASE1_PRELIM, SDRAM_MAX_SIZE); |
c83bf6a2 WD |
265 | |
266 | if (size8 < size9) { /* leave configuration at 9 columns */ | |
267 | size_b0 = size9; | |
268 | /* debug ("SDRAM Bank 0 in 9 column mode: %ld MB\n", size >> 20); */ | |
269 | } else { /* back to 8 columns */ | |
270 | ||
271 | size_b0 = size8; | |
6d0f6bcf | 272 | memctl->memc_mamr = CONFIG_SYS_MAMR_8COL; |
c83bf6a2 WD |
273 | udelay (500); |
274 | /* debug ("SDRAM Bank 0 in 8 column mode: %ld MB\n", size >> 20); */ | |
275 | } | |
276 | ||
277 | udelay (1000); | |
278 | ||
279 | /* | |
280 | * Adjust refresh rate depending on SDRAM type, both banks | |
281 | * For types > 128 MBit leave it at the current (fast) rate | |
282 | */ | |
283 | if (size_b0 < 0x02000000) { | |
284 | /* reduce to 15.6 us (62.4 us / quad) */ | |
6d0f6bcf | 285 | memctl->memc_mptpr = CONFIG_SYS_MPTPR_2BK_4K; |
c83bf6a2 WD |
286 | udelay (1000); |
287 | } | |
288 | ||
289 | /* | |
290 | * Final mapping: map bigger bank first | |
291 | */ | |
6d0f6bcf JCPV |
292 | memctl->memc_or1 = ((-size_b0) & 0xFFFF0000) | CONFIG_SYS_OR_TIMING_SDRAM; |
293 | memctl->memc_br1 = (CONFIG_SYS_SDRAM_BASE & BR_BA_MSK) | BR_MS_UPMA | BR_V; | |
3bac3513 | 294 | |
c83bf6a2 WD |
295 | { |
296 | unsigned long reg; | |
8bde7f77 | 297 | |
c83bf6a2 WD |
298 | /* adjust refresh rate depending on SDRAM type, one bank */ |
299 | reg = memctl->memc_mptpr; | |
6d0f6bcf | 300 | reg >>= 1; /* reduce to CONFIG_SYS_MPTPR_1BK_8K / _4K */ |
c83bf6a2 WD |
301 | memctl->memc_mptpr = reg; |
302 | } | |
3bac3513 | 303 | |
c83bf6a2 | 304 | udelay (10000); |
8bde7f77 | 305 | |
c83bf6a2 | 306 | return (size_b0); |
3bac3513 WD |
307 | } |
308 | ||
309 | /* ------------------------------------------------------------------------- */ | |
310 | ||
311 | /* | |
312 | * Check memory range for valid RAM. A simple memory test determines | |
313 | * the actually available RAM size between addresses `base' and | |
314 | * `base + maxsize'. Some (not all) hardware errors are detected: | |
315 | * - short between address lines | |
316 | * - short between data lines | |
317 | */ | |
318 | ||
8bde7f77 | 319 | static long int |
c83bf6a2 | 320 | dram_size (long int mamr_value, long int *base, long int maxsize) |
3bac3513 | 321 | { |
6d0f6bcf | 322 | volatile immap_t *immap = (immap_t *) CONFIG_SYS_IMMR; |
c83bf6a2 | 323 | volatile memctl8xx_t *memctl = &immap->im_memctl; |
8bde7f77 | 324 | |
c83bf6a2 | 325 | memctl->memc_mamr = mamr_value; |
3bac3513 | 326 | |
c83bf6a2 | 327 | return (get_ram_size (base, maxsize)); |
3bac3513 WD |
328 | } |
329 | ||
330 | /* ------------------------------------------------------------------------- */ | |
331 | ||
6d0f6bcf JCPV |
332 | #define CONFIG_SYS_PA1 0x4000 |
333 | #define CONFIG_SYS_PA2 0x2000 | |
3bac3513 | 334 | |
6d0f6bcf | 335 | #define CONFIG_SYS_LBKs (CONFIG_SYS_PA2 | CONFIG_SYS_PA1) |
3bac3513 | 336 | |
c83bf6a2 | 337 | void reset_phy (void) |
3bac3513 | 338 | { |
6d0f6bcf | 339 | volatile immap_t *immr = (immap_t *) CONFIG_SYS_IMMR; |
c83bf6a2 WD |
340 | |
341 | /* | |
342 | * Ensure LBK LXT901 ethernet 1 & 2 = 0 ... for normal loopback in effect | |
343 | * and no AUI loopback | |
344 | */ | |
6d0f6bcf JCPV |
345 | immr->im_ioport.iop_padat &= ~CONFIG_SYS_LBKs; /* PADAT (LBK eth 1&2 = 0) */ |
346 | immr->im_ioport.iop_papar &= ~CONFIG_SYS_LBKs; /* PAPAR (0=general purpose I/O) */ | |
347 | immr->im_ioport.iop_padir |= CONFIG_SYS_LBKs; /* PADIR (I/O: 0=input, 1=output) */ | |
3bac3513 | 348 | } |