Commit | Line | Data |
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f6dfc805 DG |
1 | /* |
2 | * Copyright 2007 David Gibson, IBM Corporation. | |
3 | * | |
4 | * Based on earlier code: | |
5 | * Matt Porter <mporter@kernel.crashing.org> | |
6 | * Copyright 2002-2005 MontaVista Software Inc. | |
7 | * | |
8 | * Eugene Surovegin <eugene.surovegin@zultys.com> or <ebs@ebshome.net> | |
9 | * Copyright (c) 2003, 2004 Zultys Technologies | |
10 | * | |
11 | * This program is free software; you can redistribute it and/or | |
12 | * modify it under the terms of the GNU General Public License | |
13 | * as published by the Free Software Foundation; either version | |
14 | * 2 of the License, or (at your option) any later version. | |
15 | */ | |
16 | #include <stddef.h> | |
17 | #include "types.h" | |
18 | #include "string.h" | |
19 | #include "stdio.h" | |
20 | #include "ops.h" | |
21 | #include "reg.h" | |
22 | #include "dcr.h" | |
23 | ||
13c501e6 JB |
24 | static unsigned long chip_11_errata(unsigned long memsize) |
25 | { | |
26 | unsigned long pvr; | |
27 | ||
28 | pvr = mfpvr(); | |
29 | ||
30 | switch (pvr & 0xf0000ff0) { | |
31 | case 0x40000850: | |
32 | case 0x400008d0: | |
33 | case 0x200008d0: | |
34 | memsize -= 4096; | |
35 | break; | |
36 | default: | |
37 | break; | |
38 | } | |
39 | ||
40 | return memsize; | |
41 | } | |
42 | ||
e90f3b74 | 43 | /* Read the 4xx SDRAM controller to get size of system memory. */ |
d23f5099 | 44 | void ibm4xx_sdram_fixup_memsize(void) |
f6dfc805 DG |
45 | { |
46 | int i; | |
47 | unsigned long memsize, bank_config; | |
48 | ||
49 | memsize = 0; | |
50 | for (i = 0; i < ARRAY_SIZE(sdram_bxcr); i++) { | |
d23f5099 | 51 | bank_config = SDRAM0_READ(sdram_bxcr[i]); |
f6dfc805 DG |
52 | if (bank_config & SDRAM_CONFIG_BANK_ENABLE) |
53 | memsize += SDRAM_CONFIG_BANK_SIZE(bank_config); | |
54 | } | |
55 | ||
13c501e6 | 56 | memsize = chip_11_errata(memsize); |
f6dfc805 DG |
57 | dt_fixup_memory(0, memsize); |
58 | } | |
11123346 | 59 | |
d23f5099 BH |
60 | /* Read the 440SPe MQ controller to get size of system memory. */ |
61 | #define DCRN_MQ0_B0BAS 0x40 | |
62 | #define DCRN_MQ0_B1BAS 0x41 | |
63 | #define DCRN_MQ0_B2BAS 0x42 | |
64 | #define DCRN_MQ0_B3BAS 0x43 | |
65 | ||
66 | static u64 ibm440spe_decode_bas(u32 bas) | |
67 | { | |
68 | u64 base = ((u64)(bas & 0xFFE00000u)) << 2; | |
69 | ||
70 | /* open coded because I'm paranoid about invalid values */ | |
71 | switch ((bas >> 4) & 0xFFF) { | |
72 | case 0: | |
73 | return 0; | |
74 | case 0xffc: | |
75 | return base + 0x000800000ull; | |
76 | case 0xff8: | |
77 | return base + 0x001000000ull; | |
78 | case 0xff0: | |
79 | return base + 0x002000000ull; | |
80 | case 0xfe0: | |
81 | return base + 0x004000000ull; | |
82 | case 0xfc0: | |
83 | return base + 0x008000000ull; | |
84 | case 0xf80: | |
85 | return base + 0x010000000ull; | |
86 | case 0xf00: | |
87 | return base + 0x020000000ull; | |
88 | case 0xe00: | |
89 | return base + 0x040000000ull; | |
90 | case 0xc00: | |
91 | return base + 0x080000000ull; | |
92 | case 0x800: | |
93 | return base + 0x100000000ull; | |
94 | } | |
95 | printf("Memory BAS value 0x%08x unsupported !\n", bas); | |
96 | return 0; | |
97 | } | |
98 | ||
99 | void ibm440spe_fixup_memsize(void) | |
100 | { | |
101 | u64 banktop, memsize = 0; | |
102 | ||
103 | /* Ultimately, we should directly construct the memory node | |
104 | * so we are able to handle holes in the memory address space | |
105 | */ | |
106 | banktop = ibm440spe_decode_bas(mfdcr(DCRN_MQ0_B0BAS)); | |
107 | if (banktop > memsize) | |
108 | memsize = banktop; | |
109 | banktop = ibm440spe_decode_bas(mfdcr(DCRN_MQ0_B1BAS)); | |
110 | if (banktop > memsize) | |
111 | memsize = banktop; | |
112 | banktop = ibm440spe_decode_bas(mfdcr(DCRN_MQ0_B2BAS)); | |
113 | if (banktop > memsize) | |
114 | memsize = banktop; | |
115 | banktop = ibm440spe_decode_bas(mfdcr(DCRN_MQ0_B3BAS)); | |
116 | if (banktop > memsize) | |
117 | memsize = banktop; | |
118 | ||
119 | dt_fixup_memory(0, memsize); | |
120 | } | |
121 | ||
122 | ||
606d08bc VB |
123 | /* 4xx DDR1/2 Denali memory controller support */ |
124 | /* DDR0 registers */ | |
125 | #define DDR0_02 2 | |
126 | #define DDR0_08 8 | |
127 | #define DDR0_10 10 | |
128 | #define DDR0_14 14 | |
129 | #define DDR0_42 42 | |
130 | #define DDR0_43 43 | |
131 | ||
132 | /* DDR0_02 */ | |
133 | #define DDR_START 0x1 | |
134 | #define DDR_START_SHIFT 0 | |
135 | #define DDR_MAX_CS_REG 0x3 | |
136 | #define DDR_MAX_CS_REG_SHIFT 24 | |
137 | #define DDR_MAX_COL_REG 0xf | |
138 | #define DDR_MAX_COL_REG_SHIFT 16 | |
139 | #define DDR_MAX_ROW_REG 0xf | |
140 | #define DDR_MAX_ROW_REG_SHIFT 8 | |
141 | /* DDR0_08 */ | |
142 | #define DDR_DDR2_MODE 0x1 | |
143 | #define DDR_DDR2_MODE_SHIFT 0 | |
144 | /* DDR0_10 */ | |
145 | #define DDR_CS_MAP 0x3 | |
146 | #define DDR_CS_MAP_SHIFT 8 | |
147 | /* DDR0_14 */ | |
148 | #define DDR_REDUC 0x1 | |
149 | #define DDR_REDUC_SHIFT 16 | |
150 | /* DDR0_42 */ | |
151 | #define DDR_APIN 0x7 | |
152 | #define DDR_APIN_SHIFT 24 | |
153 | /* DDR0_43 */ | |
154 | #define DDR_COL_SZ 0x7 | |
155 | #define DDR_COL_SZ_SHIFT 8 | |
156 | #define DDR_BANK8 0x1 | |
157 | #define DDR_BANK8_SHIFT 0 | |
158 | ||
159 | #define DDR_GET_VAL(val, mask, shift) (((val) >> (shift)) & (mask)) | |
160 | ||
644e28f3 VB |
161 | /* |
162 | * Some U-Boot versions set the number of chipselects to two | |
163 | * for Sequoia/Rainier boards while they only have one chipselect | |
164 | * hardwired. Hardcode the number of chipselects to one | |
165 | * for sequioa/rainer board models or read the actual value | |
166 | * from the memory controller register DDR0_10 otherwise. | |
167 | */ | |
168 | static inline u32 ibm4xx_denali_get_cs(void) | |
606d08bc | 169 | { |
644e28f3 VB |
170 | void *devp; |
171 | char model[64]; | |
172 | u32 val, cs; | |
606d08bc | 173 | |
644e28f3 VB |
174 | devp = finddevice("/"); |
175 | if (!devp) | |
176 | goto read_cs; | |
606d08bc | 177 | |
644e28f3 VB |
178 | if (getprop(devp, "model", model, sizeof(model)) <= 0) |
179 | goto read_cs; | |
180 | ||
181 | model[sizeof(model)-1] = 0; | |
606d08bc | 182 | |
644e28f3 VB |
183 | if (!strcmp(model, "amcc,sequoia") || |
184 | !strcmp(model, "amcc,rainier")) | |
185 | return 1; | |
186 | ||
187 | read_cs: | |
606d08bc | 188 | /* get CS value */ |
d23f5099 | 189 | val = SDRAM0_READ(DDR0_10); |
606d08bc VB |
190 | |
191 | val = DDR_GET_VAL(val, DDR_CS_MAP, DDR_CS_MAP_SHIFT); | |
192 | cs = 0; | |
193 | while (val) { | |
e0802967 | 194 | if (val & 0x1) |
606d08bc VB |
195 | cs++; |
196 | val = val >> 1; | |
197 | } | |
644e28f3 VB |
198 | return cs; |
199 | } | |
606d08bc | 200 | |
644e28f3 VB |
201 | void ibm4xx_denali_fixup_memsize(void) |
202 | { | |
203 | u32 val, max_cs, max_col, max_row; | |
204 | u32 cs, col, row, bank, dpath; | |
205 | unsigned long memsize; | |
206 | ||
207 | val = SDRAM0_READ(DDR0_02); | |
208 | if (!DDR_GET_VAL(val, DDR_START, DDR_START_SHIFT)) | |
209 | fatal("DDR controller is not initialized\n"); | |
210 | ||
211 | /* get maximum cs col and row values */ | |
212 | max_cs = DDR_GET_VAL(val, DDR_MAX_CS_REG, DDR_MAX_CS_REG_SHIFT); | |
213 | max_col = DDR_GET_VAL(val, DDR_MAX_COL_REG, DDR_MAX_COL_REG_SHIFT); | |
214 | max_row = DDR_GET_VAL(val, DDR_MAX_ROW_REG, DDR_MAX_ROW_REG_SHIFT); | |
215 | ||
216 | cs = ibm4xx_denali_get_cs(); | |
606d08bc VB |
217 | if (!cs) |
218 | fatal("No memory installed\n"); | |
219 | if (cs > max_cs) | |
220 | fatal("DDR wrong CS configuration\n"); | |
221 | ||
222 | /* get data path bytes */ | |
d23f5099 | 223 | val = SDRAM0_READ(DDR0_14); |
606d08bc VB |
224 | |
225 | if (DDR_GET_VAL(val, DDR_REDUC, DDR_REDUC_SHIFT)) | |
606d08bc | 226 | dpath = 4; /* 32 bits */ |
644e28f3 VB |
227 | else |
228 | dpath = 8; /* 64 bits */ | |
606d08bc | 229 | |
00d70419 | 230 | /* get address pins (rows) */ |
d23f5099 | 231 | val = SDRAM0_READ(DDR0_42); |
606d08bc VB |
232 | |
233 | row = DDR_GET_VAL(val, DDR_APIN, DDR_APIN_SHIFT); | |
234 | if (row > max_row) | |
235 | fatal("DDR wrong APIN configuration\n"); | |
236 | row = max_row - row; | |
237 | ||
238 | /* get collomn size and banks */ | |
d23f5099 | 239 | val = SDRAM0_READ(DDR0_43); |
606d08bc VB |
240 | |
241 | col = DDR_GET_VAL(val, DDR_COL_SZ, DDR_COL_SZ_SHIFT); | |
242 | if (col > max_col) | |
243 | fatal("DDR wrong COL configuration\n"); | |
244 | col = max_col - col; | |
245 | ||
246 | if (DDR_GET_VAL(val, DDR_BANK8, DDR_BANK8_SHIFT)) | |
247 | bank = 8; /* 8 banks */ | |
248 | else | |
249 | bank = 4; /* 4 banks */ | |
250 | ||
251 | memsize = cs * (1 << (col+row)) * bank * dpath; | |
13c501e6 | 252 | memsize = chip_11_errata(memsize); |
606d08bc VB |
253 | dt_fixup_memory(0, memsize); |
254 | } | |
255 | ||
e90f3b74 JB |
256 | #define SPRN_DBCR0_40X 0x3F2 |
257 | #define SPRN_DBCR0_44X 0x134 | |
258 | #define DBCR0_RST_SYSTEM 0x30000000 | |
11123346 DG |
259 | |
260 | void ibm44x_dbcr_reset(void) | |
261 | { | |
262 | unsigned long tmp; | |
263 | ||
264 | asm volatile ( | |
265 | "mfspr %0,%1\n" | |
266 | "oris %0,%0,%2@h\n" | |
267 | "mtspr %1,%0" | |
e90f3b74 | 268 | : "=&r"(tmp) : "i"(SPRN_DBCR0_44X), "i"(DBCR0_RST_SYSTEM) |
11123346 DG |
269 | ); |
270 | ||
271 | } | |
b2ba34f3 | 272 | |
e90f3b74 JB |
273 | void ibm40x_dbcr_reset(void) |
274 | { | |
275 | unsigned long tmp; | |
276 | ||
277 | asm volatile ( | |
278 | "mfspr %0,%1\n" | |
279 | "oris %0,%0,%2@h\n" | |
280 | "mtspr %1,%0" | |
281 | : "=&r"(tmp) : "i"(SPRN_DBCR0_40X), "i"(DBCR0_RST_SYSTEM) | |
282 | ); | |
283 | } | |
284 | ||
285 | #define EMAC_RESET 0x20000000 | |
286 | void ibm4xx_quiesce_eth(u32 *emac0, u32 *emac1) | |
287 | { | |
61974038 BH |
288 | /* Quiesce the MAL and EMAC(s) since PIBS/OpenBIOS don't |
289 | * do this for us | |
290 | */ | |
e90f3b74 JB |
291 | if (emac0) |
292 | *emac0 = EMAC_RESET; | |
293 | if (emac1) | |
294 | *emac1 = EMAC_RESET; | |
295 | ||
296 | mtdcr(DCRN_MAL0_CFG, MAL_RESET); | |
67196d72 JB |
297 | while (mfdcr(DCRN_MAL0_CFG) & MAL_RESET) |
298 | ; /* loop until reset takes effect */ | |
e90f3b74 JB |
299 | } |
300 | ||
b2ba34f3 DG |
301 | /* Read 4xx EBC bus bridge registers to get mappings of the peripheral |
302 | * banks into the OPB address space */ | |
303 | void ibm4xx_fixup_ebc_ranges(const char *ebc) | |
304 | { | |
305 | void *devp; | |
306 | u32 bxcr; | |
307 | u32 ranges[EBC_NUM_BANKS*4]; | |
308 | u32 *p = ranges; | |
309 | int i; | |
310 | ||
311 | for (i = 0; i < EBC_NUM_BANKS; i++) { | |
312 | mtdcr(DCRN_EBC0_CFGADDR, EBC_BXCR(i)); | |
313 | bxcr = mfdcr(DCRN_EBC0_CFGDATA); | |
314 | ||
315 | if ((bxcr & EBC_BXCR_BU) != EBC_BXCR_BU_OFF) { | |
316 | *p++ = i; | |
317 | *p++ = 0; | |
318 | *p++ = bxcr & EBC_BXCR_BAS; | |
319 | *p++ = EBC_BXCR_BANK_SIZE(bxcr); | |
320 | } | |
321 | } | |
322 | ||
323 | devp = finddevice(ebc); | |
324 | if (! devp) | |
325 | fatal("Couldn't locate EBC node %s\n\r", ebc); | |
326 | ||
327 | setprop(devp, "ranges", ranges, (p - ranges) * sizeof(u32)); | |
328 | } | |
2ba4573c | 329 | |
190de005 BH |
330 | /* Calculate 440GP clocks */ |
331 | void ibm440gp_fixup_clocks(unsigned int sys_clk, unsigned int ser_clk) | |
2ba4573c | 332 | { |
190de005 BH |
333 | u32 sys0 = mfdcr(DCRN_CPC0_SYS0); |
334 | u32 cr0 = mfdcr(DCRN_CPC0_CR0); | |
335 | u32 cpu, plb, opb, ebc, tb, uart0, uart1, m; | |
336 | u32 opdv = CPC0_SYS0_OPDV(sys0); | |
337 | u32 epdv = CPC0_SYS0_EPDV(sys0); | |
338 | ||
339 | if (sys0 & CPC0_SYS0_BYPASS) { | |
340 | /* Bypass system PLL */ | |
341 | cpu = plb = sys_clk; | |
342 | } else { | |
343 | if (sys0 & CPC0_SYS0_EXTSL) | |
344 | /* PerClk */ | |
345 | m = CPC0_SYS0_FWDVB(sys0) * opdv * epdv; | |
2ba4573c | 346 | else |
190de005 BH |
347 | /* CPU clock */ |
348 | m = CPC0_SYS0_FBDV(sys0) * CPC0_SYS0_FWDVA(sys0); | |
349 | cpu = sys_clk * m / CPC0_SYS0_FWDVA(sys0); | |
350 | plb = sys_clk * m / CPC0_SYS0_FWDVB(sys0); | |
2ba4573c | 351 | } |
190de005 BH |
352 | |
353 | opb = plb / opdv; | |
354 | ebc = opb / epdv; | |
355 | ||
356 | /* FIXME: Check if this is for all 440GP, or just Ebony */ | |
357 | if ((mfpvr() & 0xf0000fff) == 0x40000440) | |
358 | /* Rev. B 440GP, use external system clock */ | |
359 | tb = sys_clk; | |
2ba4573c | 360 | else |
190de005 BH |
361 | /* Rev. C 440GP, errata force us to use internal clock */ |
362 | tb = cpu; | |
2ba4573c | 363 | |
190de005 BH |
364 | if (cr0 & CPC0_CR0_U0EC) |
365 | /* External UART clock */ | |
366 | uart0 = ser_clk; | |
367 | else | |
368 | /* Internal UART clock */ | |
369 | uart0 = plb / CPC0_CR0_UDIV(cr0); | |
370 | ||
371 | if (cr0 & CPC0_CR0_U1EC) | |
372 | /* External UART clock */ | |
373 | uart1 = ser_clk; | |
374 | else | |
375 | /* Internal UART clock */ | |
376 | uart1 = plb / CPC0_CR0_UDIV(cr0); | |
377 | ||
378 | printf("PPC440GP: SysClk = %dMHz (%x)\n\r", | |
379 | (sys_clk + 500000) / 1000000, sys_clk); | |
380 | ||
381 | dt_fixup_cpu_clocks(cpu, tb, 0); | |
382 | ||
383 | dt_fixup_clock("/plb", plb); | |
384 | dt_fixup_clock("/plb/opb", opb); | |
385 | dt_fixup_clock("/plb/opb/ebc", ebc); | |
386 | dt_fixup_clock("/plb/opb/serial@40000200", uart0); | |
387 | dt_fixup_clock("/plb/opb/serial@40000300", uart1); | |
388 | } | |
389 | ||
390 | #define SPRN_CCR1 0x378 | |
391 | ||
392 | static inline u32 __fix_zero(u32 v, u32 def) | |
393 | { | |
394 | return v ? v : def; | |
395 | } | |
396 | ||
397 | static unsigned int __ibm440eplike_fixup_clocks(unsigned int sys_clk, | |
398 | unsigned int tmr_clk, | |
399 | int per_clk_from_opb) | |
400 | { | |
401 | /* PLL config */ | |
402 | u32 pllc = CPR0_READ(DCRN_CPR0_PLLC); | |
403 | u32 plld = CPR0_READ(DCRN_CPR0_PLLD); | |
404 | ||
405 | /* Dividers */ | |
406 | u32 fbdv = __fix_zero((plld >> 24) & 0x1f, 32); | |
407 | u32 fwdva = __fix_zero((plld >> 16) & 0xf, 16); | |
408 | u32 fwdvb = __fix_zero((plld >> 8) & 7, 8); | |
409 | u32 lfbdv = __fix_zero(plld & 0x3f, 64); | |
410 | u32 pradv0 = __fix_zero((CPR0_READ(DCRN_CPR0_PRIMAD) >> 24) & 7, 8); | |
411 | u32 prbdv0 = __fix_zero((CPR0_READ(DCRN_CPR0_PRIMBD) >> 24) & 7, 8); | |
412 | u32 opbdv0 = __fix_zero((CPR0_READ(DCRN_CPR0_OPBD) >> 24) & 3, 4); | |
413 | u32 perdv0 = __fix_zero((CPR0_READ(DCRN_CPR0_PERD) >> 24) & 3, 4); | |
414 | ||
415 | /* Input clocks for primary dividers */ | |
416 | u32 clk_a, clk_b; | |
417 | ||
418 | /* Resulting clocks */ | |
419 | u32 cpu, plb, opb, ebc, vco; | |
420 | ||
421 | /* Timebase */ | |
422 | u32 ccr1, tb = tmr_clk; | |
423 | ||
424 | if (pllc & 0x40000000) { | |
425 | u32 m; | |
426 | ||
427 | /* Feedback path */ | |
428 | switch ((pllc >> 24) & 7) { | |
429 | case 0: | |
430 | /* PLLOUTx */ | |
431 | m = ((pllc & 0x20000000) ? fwdvb : fwdva) * lfbdv; | |
432 | break; | |
433 | case 1: | |
434 | /* CPU */ | |
435 | m = fwdva * pradv0; | |
436 | break; | |
437 | case 5: | |
438 | /* PERClk */ | |
439 | m = fwdvb * prbdv0 * opbdv0 * perdv0; | |
440 | break; | |
441 | default: | |
442 | printf("WARNING ! Invalid PLL feedback source !\n"); | |
443 | goto bypass; | |
444 | } | |
445 | m *= fbdv; | |
446 | vco = sys_clk * m; | |
447 | clk_a = vco / fwdva; | |
448 | clk_b = vco / fwdvb; | |
449 | } else { | |
450 | bypass: | |
451 | /* Bypass system PLL */ | |
452 | vco = 0; | |
453 | clk_a = clk_b = sys_clk; | |
454 | } | |
2ba4573c | 455 | |
190de005 BH |
456 | cpu = clk_a / pradv0; |
457 | plb = clk_b / prbdv0; | |
458 | opb = plb / opbdv0; | |
459 | ebc = (per_clk_from_opb ? opb : plb) / perdv0; | |
2ba4573c JB |
460 | |
461 | /* Figure out timebase. Either CPU or default TmrClk */ | |
190de005 BH |
462 | ccr1 = mfspr(SPRN_CCR1); |
463 | ||
464 | /* If passed a 0 tmr_clk, force CPU clock */ | |
465 | if (tb == 0) { | |
466 | ccr1 &= ~0x80u; | |
467 | mtspr(SPRN_CCR1, ccr1); | |
468 | } | |
469 | if ((ccr1 & 0x0080) == 0) | |
2ba4573c JB |
470 | tb = cpu; |
471 | ||
472 | dt_fixup_cpu_clocks(cpu, tb, 0); | |
473 | dt_fixup_clock("/plb", plb); | |
474 | dt_fixup_clock("/plb/opb", opb); | |
475 | dt_fixup_clock("/plb/opb/ebc", ebc); | |
190de005 BH |
476 | |
477 | return plb; | |
478 | } | |
479 | ||
480 | static void eplike_fixup_uart_clk(int index, const char *path, | |
481 | unsigned int ser_clk, | |
482 | unsigned int plb_clk) | |
483 | { | |
484 | unsigned int sdr; | |
485 | unsigned int clock; | |
486 | ||
487 | switch (index) { | |
488 | case 0: | |
489 | sdr = SDR0_READ(DCRN_SDR0_UART0); | |
490 | break; | |
491 | case 1: | |
492 | sdr = SDR0_READ(DCRN_SDR0_UART1); | |
493 | break; | |
494 | case 2: | |
495 | sdr = SDR0_READ(DCRN_SDR0_UART2); | |
496 | break; | |
497 | case 3: | |
498 | sdr = SDR0_READ(DCRN_SDR0_UART3); | |
499 | break; | |
500 | default: | |
501 | return; | |
502 | } | |
503 | ||
504 | if (sdr & 0x00800000u) | |
505 | clock = ser_clk; | |
506 | else | |
507 | clock = plb_clk / __fix_zero(sdr & 0xff, 256); | |
508 | ||
509 | dt_fixup_clock(path, clock); | |
510 | } | |
511 | ||
512 | void ibm440ep_fixup_clocks(unsigned int sys_clk, | |
513 | unsigned int ser_clk, | |
514 | unsigned int tmr_clk) | |
515 | { | |
516 | unsigned int plb_clk = __ibm440eplike_fixup_clocks(sys_clk, tmr_clk, 0); | |
517 | ||
518 | /* serial clocks beed fixup based on int/ext */ | |
519 | eplike_fixup_uart_clk(0, "/plb/opb/serial@ef600300", ser_clk, plb_clk); | |
520 | eplike_fixup_uart_clk(1, "/plb/opb/serial@ef600400", ser_clk, plb_clk); | |
521 | eplike_fixup_uart_clk(2, "/plb/opb/serial@ef600500", ser_clk, plb_clk); | |
522 | eplike_fixup_uart_clk(3, "/plb/opb/serial@ef600600", ser_clk, plb_clk); | |
523 | } | |
524 | ||
525 | void ibm440gx_fixup_clocks(unsigned int sys_clk, | |
526 | unsigned int ser_clk, | |
527 | unsigned int tmr_clk) | |
528 | { | |
529 | unsigned int plb_clk = __ibm440eplike_fixup_clocks(sys_clk, tmr_clk, 1); | |
530 | ||
531 | /* serial clocks beed fixup based on int/ext */ | |
532 | eplike_fixup_uart_clk(0, "/plb/opb/serial@40000200", ser_clk, plb_clk); | |
533 | eplike_fixup_uart_clk(1, "/plb/opb/serial@40000300", ser_clk, plb_clk); | |
534 | } | |
535 | ||
536 | void ibm440spe_fixup_clocks(unsigned int sys_clk, | |
537 | unsigned int ser_clk, | |
538 | unsigned int tmr_clk) | |
539 | { | |
540 | unsigned int plb_clk = __ibm440eplike_fixup_clocks(sys_clk, tmr_clk, 1); | |
541 | ||
542 | /* serial clocks beed fixup based on int/ext */ | |
543 | eplike_fixup_uart_clk(0, "/plb/opb/serial@10000200", ser_clk, plb_clk); | |
544 | eplike_fixup_uart_clk(1, "/plb/opb/serial@10000300", ser_clk, plb_clk); | |
545 | eplike_fixup_uart_clk(2, "/plb/opb/serial@10000600", ser_clk, plb_clk); | |
2ba4573c | 546 | } |
61974038 | 547 | |
190de005 | 548 | void ibm405gp_fixup_clocks(unsigned int sys_clk, unsigned int ser_clk) |
61974038 BH |
549 | { |
550 | u32 pllmr = mfdcr(DCRN_CPC0_PLLMR); | |
551 | u32 cpc0_cr0 = mfdcr(DCRN_405_CPC0_CR0); | |
552 | u32 cpc0_cr1 = mfdcr(DCRN_405_CPC0_CR1); | |
2af59f7d | 553 | u32 psr = mfdcr(DCRN_405_CPC0_PSR); |
61974038 | 554 | u32 cpu, plb, opb, ebc, tb, uart0, uart1, m; |
2af59f7d | 555 | u32 fwdv, fwdvb, fbdv, cbdv, opdv, epdv, ppdv, udiv; |
61974038 BH |
556 | |
557 | fwdv = (8 - ((pllmr & 0xe0000000) >> 29)); | |
558 | fbdv = (pllmr & 0x1e000000) >> 25; | |
2af59f7d MF |
559 | if (fbdv == 0) |
560 | fbdv = 16; | |
561 | cbdv = ((pllmr & 0x00060000) >> 17) + 1; /* CPU:PLB */ | |
562 | opdv = ((pllmr & 0x00018000) >> 15) + 1; /* PLB:OPB */ | |
563 | ppdv = ((pllmr & 0x00001800) >> 13) + 1; /* PLB:PCI */ | |
564 | epdv = ((pllmr & 0x00001800) >> 11) + 2; /* PLB:EBC */ | |
61974038 BH |
565 | udiv = ((cpc0_cr0 & 0x3e) >> 1) + 1; |
566 | ||
2af59f7d MF |
567 | /* check for 405GPr */ |
568 | if ((mfpvr() & 0xfffffff0) == (0x50910951 & 0xfffffff0)) { | |
569 | fwdvb = 8 - (pllmr & 0x00000007); | |
570 | if (!(psr & 0x00001000)) /* PCI async mode enable == 0 */ | |
571 | if (psr & 0x00000020) /* New mode enable */ | |
572 | m = fwdvb * 2 * ppdv; | |
573 | else | |
574 | m = fwdvb * cbdv * ppdv; | |
575 | else if (psr & 0x00000020) /* New mode enable */ | |
576 | if (psr & 0x00000800) /* PerClk synch mode */ | |
577 | m = fwdvb * 2 * epdv; | |
578 | else | |
579 | m = fbdv * fwdv; | |
580 | else if (epdv == fbdv) | |
581 | m = fbdv * cbdv * epdv; | |
582 | else | |
583 | m = fbdv * fwdvb * cbdv; | |
61974038 | 584 | |
2af59f7d MF |
585 | cpu = sys_clk * m / fwdv; |
586 | plb = sys_clk * m / (fwdvb * cbdv); | |
587 | } else { | |
588 | m = fwdv * fbdv * cbdv; | |
589 | cpu = sys_clk * m / fwdv; | |
590 | plb = cpu / cbdv; | |
591 | } | |
61974038 BH |
592 | opb = plb / opdv; |
593 | ebc = plb / epdv; | |
594 | ||
67196d72 | 595 | if (cpc0_cr0 & 0x80) |
61974038 BH |
596 | /* uart0 uses the external clock */ |
597 | uart0 = ser_clk; | |
67196d72 | 598 | else |
61974038 | 599 | uart0 = cpu / udiv; |
61974038 | 600 | |
67196d72 | 601 | if (cpc0_cr0 & 0x40) |
61974038 BH |
602 | /* uart1 uses the external clock */ |
603 | uart1 = ser_clk; | |
67196d72 | 604 | else |
61974038 | 605 | uart1 = cpu / udiv; |
61974038 BH |
606 | |
607 | /* setup the timebase clock to tick at the cpu frequency */ | |
608 | cpc0_cr1 = cpc0_cr1 & ~0x00800000; | |
609 | mtdcr(DCRN_405_CPC0_CR1, cpc0_cr1); | |
610 | tb = cpu; | |
611 | ||
612 | dt_fixup_cpu_clocks(cpu, tb, 0); | |
613 | dt_fixup_clock("/plb", plb); | |
614 | dt_fixup_clock("/plb/opb", opb); | |
615 | dt_fixup_clock("/plb/ebc", ebc); | |
616 | dt_fixup_clock("/plb/opb/serial@ef600300", uart0); | |
617 | dt_fixup_clock("/plb/opb/serial@ef600400", uart1); | |
618 | } | |
619 | ||
2af59f7d MF |
620 | |
621 | void ibm405ep_fixup_clocks(unsigned int sys_clk) | |
622 | { | |
623 | u32 pllmr0 = mfdcr(DCRN_CPC0_PLLMR0); | |
624 | u32 pllmr1 = mfdcr(DCRN_CPC0_PLLMR1); | |
625 | u32 cpc0_ucr = mfdcr(DCRN_CPC0_UCR); | |
626 | u32 cpu, plb, opb, ebc, uart0, uart1; | |
627 | u32 fwdva, fwdvb, fbdv, cbdv, opdv, epdv; | |
628 | u32 pllmr0_ccdv, tb, m; | |
629 | ||
630 | fwdva = 8 - ((pllmr1 & 0x00070000) >> 16); | |
631 | fwdvb = 8 - ((pllmr1 & 0x00007000) >> 12); | |
632 | fbdv = (pllmr1 & 0x00f00000) >> 20; | |
633 | if (fbdv == 0) | |
634 | fbdv = 16; | |
635 | ||
636 | cbdv = ((pllmr0 & 0x00030000) >> 16) + 1; /* CPU:PLB */ | |
637 | epdv = ((pllmr0 & 0x00000300) >> 8) + 2; /* PLB:EBC */ | |
638 | opdv = ((pllmr0 & 0x00003000) >> 12) + 1; /* PLB:OPB */ | |
639 | ||
640 | m = fbdv * fwdvb; | |
641 | ||
642 | pllmr0_ccdv = ((pllmr0 & 0x00300000) >> 20) + 1; | |
643 | if (pllmr1 & 0x80000000) | |
644 | cpu = sys_clk * m / (fwdva * pllmr0_ccdv); | |
645 | else | |
646 | cpu = sys_clk / pllmr0_ccdv; | |
647 | ||
648 | plb = cpu / cbdv; | |
649 | opb = plb / opdv; | |
650 | ebc = plb / epdv; | |
651 | tb = cpu; | |
652 | uart0 = cpu / (cpc0_ucr & 0x0000007f); | |
653 | uart1 = cpu / ((cpc0_ucr & 0x00007f00) >> 8); | |
654 | ||
655 | dt_fixup_cpu_clocks(cpu, tb, 0); | |
656 | dt_fixup_clock("/plb", plb); | |
657 | dt_fixup_clock("/plb/opb", opb); | |
658 | dt_fixup_clock("/plb/ebc", ebc); | |
659 | dt_fixup_clock("/plb/opb/serial@ef600300", uart0); | |
660 | dt_fixup_clock("/plb/opb/serial@ef600400", uart1); | |
661 | } |