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c609719b WD |
1 | /* |
2 | * (C) Copyright 2000 | |
3 | * Wolfgang Denk, DENX Software Engineering, wd@denx.de. | |
4 | * | |
5 | * See file CREDITS for list of people who contributed to this | |
6 | * project. | |
7 | * | |
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. | |
12 | * | |
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. | |
17 | * | |
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, | |
21 | * MA 02111-1307 USA | |
22 | */ | |
23 | ||
24 | #include <common.h> | |
25 | #include <ppc_asm.tmpl> | |
26 | #include <ppc4xx.h> | |
27 | #include <asm/processor.h> | |
28 | ||
29 | /* ------------------------------------------------------------------------- */ | |
30 | ||
31 | #define ONE_BILLION 1000000000 | |
32 | ||
33 | ||
34 | #if defined(CONFIG_405GP) || defined(CONFIG_405CR) | |
35 | ||
36 | void get_sys_info (PPC405_SYS_INFO * sysInfo) | |
37 | { | |
38 | unsigned long pllmr; | |
39 | unsigned long sysClkPeriodPs = ONE_BILLION / (CONFIG_SYS_CLK_FREQ / 1000); | |
40 | uint pvr = get_pvr(); | |
41 | unsigned long psr; | |
42 | unsigned long m; | |
43 | ||
44 | /* | |
45 | * Read PLL Mode register | |
46 | */ | |
47 | pllmr = mfdcr (pllmd); | |
48 | ||
49 | /* | |
50 | * Read Pin Strapping register | |
51 | */ | |
52 | psr = mfdcr (strap); | |
53 | ||
54 | /* | |
55 | * Determine FWD_DIV. | |
56 | */ | |
57 | sysInfo->pllFwdDiv = 8 - ((pllmr & PLLMR_FWD_DIV_MASK) >> 29); | |
58 | ||
59 | /* | |
60 | * Determine FBK_DIV. | |
61 | */ | |
62 | sysInfo->pllFbkDiv = ((pllmr & PLLMR_FB_DIV_MASK) >> 25); | |
63 | if (sysInfo->pllFbkDiv == 0) { | |
64 | sysInfo->pllFbkDiv = 16; | |
65 | } | |
66 | ||
67 | /* | |
68 | * Determine PLB_DIV. | |
69 | */ | |
70 | sysInfo->pllPlbDiv = ((pllmr & PLLMR_CPU_TO_PLB_MASK) >> 17) + 1; | |
71 | ||
72 | /* | |
73 | * Determine PCI_DIV. | |
74 | */ | |
75 | sysInfo->pllPciDiv = ((pllmr & PLLMR_PCI_TO_PLB_MASK) >> 13) + 1; | |
76 | ||
77 | /* | |
78 | * Determine EXTBUS_DIV. | |
79 | */ | |
80 | sysInfo->pllExtBusDiv = ((pllmr & PLLMR_EXB_TO_PLB_MASK) >> 11) + 2; | |
81 | ||
82 | /* | |
83 | * Determine OPB_DIV. | |
84 | */ | |
85 | sysInfo->pllOpbDiv = ((pllmr & PLLMR_OPB_TO_PLB_MASK) >> 15) + 1; | |
86 | ||
87 | /* | |
88 | * Check if PPC405GPr used (mask minor revision field) | |
89 | */ | |
baa3d528 | 90 | if ((pvr & 0xfffffff0) == (PVR_405GPR_RB & 0xfffffff0)) { |
c609719b WD |
91 | /* |
92 | * Determine FWD_DIV B (only PPC405GPr with new mode strapping). | |
93 | */ | |
94 | sysInfo->pllFwdDivB = 8 - (pllmr & PLLMR_FWDB_DIV_MASK); | |
95 | ||
96 | /* | |
97 | * Determine factor m depending on PLL feedback clock source | |
98 | */ | |
99 | if (!(psr & PSR_PCI_ASYNC_EN)) { | |
100 | if (psr & PSR_NEW_MODE_EN) { | |
101 | /* | |
102 | * sync pci clock used as feedback (new mode) | |
103 | */ | |
104 | m = 1 * sysInfo->pllFwdDivB * 2 * sysInfo->pllPciDiv; | |
105 | } else { | |
106 | /* | |
107 | * sync pci clock used as feedback (legacy mode) | |
108 | */ | |
109 | m = 1 * sysInfo->pllFwdDivB * sysInfo->pllPlbDiv * sysInfo->pllPciDiv; | |
110 | } | |
111 | } else if (psr & PSR_NEW_MODE_EN) { | |
112 | if (psr & PSR_PERCLK_SYNC_MODE_EN) { | |
113 | /* | |
114 | * PerClk used as feedback (new mode) | |
115 | */ | |
116 | m = 1 * sysInfo->pllFwdDivB * 2 * sysInfo->pllExtBusDiv; | |
117 | } else { | |
118 | /* | |
119 | * CPU clock used as feedback (new mode) | |
120 | */ | |
121 | m = sysInfo->pllFbkDiv * sysInfo->pllFwdDiv; | |
122 | } | |
123 | } else if (sysInfo->pllExtBusDiv == sysInfo->pllFbkDiv) { | |
124 | /* | |
125 | * PerClk used as feedback (legacy mode) | |
126 | */ | |
127 | m = 1 * sysInfo->pllFwdDivB * sysInfo->pllPlbDiv * sysInfo->pllExtBusDiv; | |
128 | } else { | |
129 | /* | |
130 | * PLB clock used as feedback (legacy mode) | |
131 | */ | |
132 | m = sysInfo->pllFbkDiv * sysInfo->pllFwdDivB * sysInfo->pllPlbDiv; | |
133 | } | |
134 | ||
135 | sysInfo->freqVCOMhz = (1000000 * m) / sysClkPeriodPs; | |
136 | sysInfo->freqProcessor = (sysInfo->freqVCOMhz * 1000000) / sysInfo->pllFwdDiv; | |
137 | sysInfo->freqPLB = (sysInfo->freqVCOMhz * 1000000) / | |
138 | (sysInfo->pllFwdDivB * sysInfo->pllPlbDiv); | |
139 | } else { | |
140 | /* | |
141 | * Check pllFwdDiv to see if running in bypass mode where the CPU speed | |
142 | * is equal to the 405GP SYS_CLK_FREQ. If not in bypass mode, check VCO | |
143 | * to make sure it is within the proper range. | |
144 | * spec: VCO = SYS_CLOCK x FBKDIV x PLBDIV x FWDDIV | |
145 | * Note freqVCO is calculated in Mhz to avoid errors introduced by rounding. | |
146 | */ | |
147 | if (sysInfo->pllFwdDiv == 1) { | |
148 | sysInfo->freqProcessor = CONFIG_SYS_CLK_FREQ; | |
149 | sysInfo->freqPLB = CONFIG_SYS_CLK_FREQ / sysInfo->pllPlbDiv; | |
150 | } else { | |
151 | sysInfo->freqVCOMhz = ( 1000000 * | |
152 | sysInfo->pllFwdDiv * | |
153 | sysInfo->pllFbkDiv * | |
154 | sysInfo->pllPlbDiv | |
155 | ) / sysClkPeriodPs; | |
156 | if (sysInfo->freqVCOMhz >= VCO_MIN | |
157 | && sysInfo->freqVCOMhz <= VCO_MAX) { | |
158 | sysInfo->freqPLB = (ONE_BILLION / | |
159 | ((sysClkPeriodPs * 10) / | |
160 | sysInfo->pllFbkDiv)) * 10000; | |
161 | sysInfo->freqProcessor = sysInfo->freqPLB * sysInfo->pllPlbDiv; | |
162 | } else { | |
163 | printf ("\nInvalid VCO frequency calculated : %ld MHz \a\n", | |
164 | sysInfo->freqVCOMhz); | |
165 | printf ("It must be between %d-%d MHz \a\n", | |
166 | VCO_MIN, VCO_MAX); | |
167 | printf ("PLL Mode reg : %8.8lx\a\n", | |
168 | pllmr); | |
169 | hang (); | |
170 | } | |
171 | } | |
172 | } | |
173 | } | |
174 | ||
175 | ||
176 | /******************************************** | |
177 | * get_OPB_freq | |
178 | * return OPB bus freq in Hz | |
179 | *********************************************/ | |
180 | ulong get_OPB_freq (void) | |
181 | { | |
182 | ulong val = 0; | |
183 | ||
184 | PPC405_SYS_INFO sys_info; | |
185 | ||
186 | get_sys_info (&sys_info); | |
187 | val = sys_info.freqPLB / sys_info.pllOpbDiv; | |
188 | ||
189 | return val; | |
190 | } | |
191 | ||
192 | ||
193 | /******************************************** | |
194 | * get_PCI_freq | |
195 | * return PCI bus freq in Hz | |
196 | *********************************************/ | |
197 | ulong get_PCI_freq (void) | |
198 | { | |
199 | ulong val; | |
200 | PPC405_SYS_INFO sys_info; | |
201 | ||
202 | get_sys_info (&sys_info); | |
203 | val = sys_info.freqPLB / sys_info.pllPciDiv; | |
204 | return val; | |
205 | } | |
206 | ||
207 | ||
208 | #elif defined(CONFIG_440) | |
ba56f625 | 209 | #if !defined(CONFIG_440_GX) |
c609719b WD |
210 | void get_sys_info (sys_info_t * sysInfo) |
211 | { | |
212 | unsigned long strp0; | |
213 | unsigned long temp; | |
214 | unsigned long m; | |
215 | ||
216 | /* Extract configured divisors */ | |
217 | strp0 = mfdcr( cpc0_strp0 ); | |
218 | sysInfo->pllFwdDivA = 8 - ((strp0 & PLLSYS0_FWD_DIV_A_MASK) >> 15); | |
219 | sysInfo->pllFwdDivB = 8 - ((strp0 & PLLSYS0_FWD_DIV_B_MASK) >> 12); | |
220 | temp = (strp0 & PLLSYS0_FB_DIV_MASK) >> 18; | |
221 | sysInfo->pllFbkDiv = temp ? temp : 16; | |
222 | sysInfo->pllOpbDiv = 1 + ((strp0 & PLLSYS0_OPB_DIV_MASK) >> 10); | |
223 | sysInfo->pllExtBusDiv = 1 + ((strp0 & PLLSYS0_EPB_DIV_MASK) >> 8); | |
224 | ||
225 | /* Calculate 'M' based on feedback source */ | |
226 | if( strp0 & PLLSYS0_EXTSL_MASK ) | |
227 | m = sysInfo->pllExtBusDiv * sysInfo->pllOpbDiv * sysInfo->pllFwdDivB; | |
228 | else | |
229 | m = sysInfo->pllFbkDiv * sysInfo->pllFwdDivA; | |
230 | ||
231 | /* Now calculate the individual clocks */ | |
232 | sysInfo->freqVCOMhz = (m * CONFIG_SYS_CLK_FREQ) + (m>>1); | |
233 | sysInfo->freqProcessor = sysInfo->freqVCOMhz/sysInfo->pllFwdDivA; | |
234 | sysInfo->freqPLB = sysInfo->freqVCOMhz/sysInfo->pllFwdDivB; | |
235 | if( get_pvr() == PVR_440GP_RB ) /* Rev B divs an extra 2 -- geez! */ | |
8bde7f77 | 236 | sysInfo->freqPLB >>= 1; |
c609719b WD |
237 | sysInfo->freqOPB = sysInfo->freqPLB/sysInfo->pllOpbDiv; |
238 | sysInfo->freqEPB = sysInfo->freqOPB/sysInfo->pllExtBusDiv; | |
239 | ||
240 | } | |
ba56f625 WD |
241 | #else |
242 | void get_sys_info (sys_info_t * sysInfo) | |
243 | { | |
244 | unsigned long strp0; | |
245 | unsigned long strp1; | |
246 | unsigned long temp; | |
247 | unsigned long temp1; | |
248 | unsigned long lfdiv; | |
249 | unsigned long m; | |
250 | ||
251 | ||
252 | /* Extract configured divisors */ | |
253 | mfsdr( sdr_sdstp0,strp0 ); | |
254 | mfsdr( sdr_sdstp1,strp1 ); | |
255 | ||
256 | temp = ((strp0 & PLLSYS0_FWD_DIV_A_MASK) >> 8); | |
257 | sysInfo->pllFwdDivA = temp ? temp : 16 ; | |
258 | temp = ((strp0 & PLLSYS0_FWD_DIV_B_MASK) >> 5); | |
259 | sysInfo->pllFwdDivB = temp ? temp: 8 ; | |
260 | temp = (strp0 & PLLSYS0_FB_DIV_MASK) >> 12; | |
261 | sysInfo->pllFbkDiv = temp ? temp : 32; | |
262 | temp = (strp0 & PLLSYS0_OPB_DIV_MASK); | |
263 | sysInfo->pllOpbDiv = temp ? temp : 4; | |
264 | temp = (strp1 & PLLSYS1_PERCLK_DIV_MASK) >> 24; | |
265 | sysInfo->pllExtBusDiv = temp ? temp : 4; | |
266 | ||
267 | /* Calculate 'M' based on feedback source */ | |
268 | temp = (strp0 & PLLSYS0_SEL_MASK) >> 27; | |
269 | temp1 = (strp1 & PLLSYS1_LF_DIV_MASK) >> 26; | |
270 | lfdiv = temp1 ? temp1 : 64; | |
271 | if (temp == 0) { /* PLL output */ | |
272 | /* Figure which pll to use */ | |
273 | temp = (strp0 & PLLSYS0_SRC_MASK) >> 30; | |
274 | if (!temp) | |
275 | m = sysInfo->pllFbkDiv * lfdiv * sysInfo->pllFwdDivA; | |
276 | else | |
277 | m = sysInfo->pllFbkDiv * lfdiv * sysInfo->pllFwdDivB; | |
278 | } | |
279 | else if (temp == 1) /* CPU output */ | |
280 | m = sysInfo->pllFbkDiv * sysInfo->pllFwdDivA; | |
281 | else /* PerClk */ | |
282 | m = sysInfo->pllExtBusDiv * sysInfo->pllOpbDiv * sysInfo->pllFwdDivB; | |
283 | ||
284 | /* Now calculate the individual clocks */ | |
285 | sysInfo->freqVCOMhz = (m * CONFIG_SYS_CLK_FREQ) + (m>>1); | |
286 | sysInfo->freqProcessor = sysInfo->freqVCOMhz/sysInfo->pllFwdDivA; | |
287 | sysInfo->freqPLB = sysInfo->freqVCOMhz/sysInfo->pllFwdDivB; | |
288 | sysInfo->freqOPB = sysInfo->freqPLB/sysInfo->pllOpbDiv; | |
289 | sysInfo->freqEPB = sysInfo->freqOPB/sysInfo->pllExtBusDiv; | |
290 | ||
291 | } | |
292 | #endif | |
c609719b WD |
293 | |
294 | ulong get_OPB_freq (void) | |
295 | { | |
296 | ||
297 | sys_info_t sys_info; | |
298 | get_sys_info (&sys_info); | |
299 | return sys_info.freqOPB; | |
300 | } | |
301 | ||
302 | #elif defined(CONFIG_405) | |
303 | ||
304 | void get_sys_info (sys_info_t * sysInfo) { | |
305 | ||
306 | sysInfo->freqVCOMhz=3125000; | |
307 | sysInfo->freqProcessor=12*1000*1000; | |
308 | sysInfo->freqPLB=50*1000*1000; | |
309 | sysInfo->freqPCI=66*1000*1000; | |
310 | ||
311 | } | |
312 | ||
b867d705 SR |
313 | #elif defined(CONFIG_405EP) |
314 | void get_sys_info (PPC405_SYS_INFO * sysInfo) | |
315 | { | |
316 | unsigned long pllmr0; | |
317 | unsigned long pllmr1; | |
318 | unsigned long sysClkPeriodPs = ONE_BILLION / (CONFIG_SYS_CLK_FREQ / 1000); | |
319 | unsigned long m; | |
320 | unsigned long pllmr0_ccdv; | |
321 | ||
322 | /* | |
323 | * Read PLL Mode registers | |
324 | */ | |
325 | pllmr0 = mfdcr (cpc0_pllmr0); | |
326 | pllmr1 = mfdcr (cpc0_pllmr1); | |
327 | ||
328 | /* | |
329 | * Determine forward divider A | |
330 | */ | |
331 | sysInfo->pllFwdDiv = 8 - ((pllmr1 & PLLMR1_FWDVA_MASK) >> 16); | |
332 | ||
333 | /* | |
334 | * Determine forward divider B (should be equal to A) | |
335 | */ | |
336 | sysInfo->pllFwdDivB = 8 - ((pllmr1 & PLLMR1_FWDVB_MASK) >> 12); | |
337 | ||
338 | /* | |
339 | * Determine FBK_DIV. | |
340 | */ | |
341 | sysInfo->pllFbkDiv = ((pllmr1 & PLLMR1_FBMUL_MASK) >> 20); | |
342 | if (sysInfo->pllFbkDiv == 0) { | |
343 | sysInfo->pllFbkDiv = 16; | |
344 | } | |
345 | ||
346 | /* | |
347 | * Determine PLB_DIV. | |
348 | */ | |
349 | sysInfo->pllPlbDiv = ((pllmr0 & PLLMR0_CPU_TO_PLB_MASK) >> 16) + 1; | |
350 | ||
351 | /* | |
352 | * Determine PCI_DIV. | |
353 | */ | |
354 | sysInfo->pllPciDiv = (pllmr0 & PLLMR0_PCI_TO_PLB_MASK) + 1; | |
355 | ||
356 | /* | |
357 | * Determine EXTBUS_DIV. | |
358 | */ | |
359 | sysInfo->pllExtBusDiv = ((pllmr0 & PLLMR0_EXB_TO_PLB_MASK) >> 8) + 2; | |
360 | ||
361 | /* | |
362 | * Determine OPB_DIV. | |
363 | */ | |
364 | sysInfo->pllOpbDiv = ((pllmr0 & PLLMR0_OPB_TO_PLB_MASK) >> 12) + 1; | |
365 | ||
366 | /* | |
367 | * Determine the M factor | |
368 | */ | |
369 | m = sysInfo->pllFbkDiv * sysInfo->pllFwdDivB; | |
370 | ||
371 | /* | |
372 | * Determine VCO clock frequency | |
373 | */ | |
374 | sysInfo->freqVCOMhz = (1000000 * m) / sysClkPeriodPs; | |
375 | ||
376 | /* | |
377 | * Determine CPU clock frequency | |
378 | */ | |
379 | pllmr0_ccdv = ((pllmr0 & PLLMR0_CPU_DIV_MASK) >> 20) + 1; | |
380 | if (pllmr1 & PLLMR1_SSCS_MASK) { | |
381 | sysInfo->freqProcessor = (CONFIG_SYS_CLK_FREQ * sysInfo->pllFbkDiv) | |
382 | / pllmr0_ccdv; | |
383 | } else { | |
384 | sysInfo->freqProcessor = CONFIG_SYS_CLK_FREQ / pllmr0_ccdv; | |
385 | } | |
386 | ||
387 | /* | |
388 | * Determine PLB clock frequency | |
389 | */ | |
390 | sysInfo->freqPLB = sysInfo->freqProcessor / sysInfo->pllPlbDiv; | |
391 | ||
392 | if (!((sysInfo->freqVCOMhz >= VCO_MIN) && (sysInfo->freqVCOMhz <= VCO_MAX))) { | |
393 | printf ("\nInvalid VCO frequency calculated : %ld MHz \a\n", | |
394 | sysInfo->freqVCOMhz); | |
395 | printf ("It must be between %d-%d MHz \a\n", VCO_MIN, VCO_MAX); | |
396 | printf ("PLL Mode reg 0 : %8.8lx\a\n", pllmr0); | |
397 | printf ("PLL Mode reg 1 : %8.8lx\a\n", pllmr1); | |
398 | hang (); | |
399 | } | |
400 | } | |
401 | ||
402 | ||
403 | /******************************************** | |
404 | * get_OPB_freq | |
405 | * return OPB bus freq in Hz | |
406 | *********************************************/ | |
407 | ulong get_OPB_freq (void) | |
408 | { | |
409 | ulong val = 0; | |
410 | ||
411 | PPC405_SYS_INFO sys_info; | |
412 | ||
413 | get_sys_info (&sys_info); | |
414 | val = sys_info.freqPLB / sys_info.pllOpbDiv; | |
415 | ||
416 | return val; | |
417 | } | |
418 | ||
419 | ||
420 | /******************************************** | |
421 | * get_PCI_freq | |
422 | * return PCI bus freq in Hz | |
423 | *********************************************/ | |
424 | ulong get_PCI_freq (void) | |
425 | { | |
426 | ulong val; | |
427 | PPC405_SYS_INFO sys_info; | |
428 | ||
429 | get_sys_info (&sys_info); | |
430 | val = sys_info.freqPLB / sys_info.pllPciDiv; | |
431 | return val; | |
432 | } | |
433 | ||
c609719b WD |
434 | #endif |
435 | ||
436 | int get_clocks (void) | |
437 | { | |
b867d705 | 438 | #if defined(CONFIG_405GP) || defined(CONFIG_405CR) || defined(CONFIG_440) || defined(CONFIG_405) || defined(CONFIG_405EP) |
c609719b WD |
439 | DECLARE_GLOBAL_DATA_PTR; |
440 | ||
441 | sys_info_t sys_info; | |
442 | ||
443 | get_sys_info (&sys_info); | |
444 | gd->cpu_clk = sys_info.freqProcessor; | |
445 | gd->bus_clk = sys_info.freqPLB; | |
446 | ||
447 | #endif /* defined(CONFIG_405GP) || defined(CONFIG_405CR) */ | |
448 | ||
449 | #ifdef CONFIG_IOP480 | |
450 | DECLARE_GLOBAL_DATA_PTR; | |
451 | ||
452 | gd->cpu_clk = 66000000; | |
453 | gd->bus_clk = 66000000; | |
454 | #endif | |
455 | return (0); | |
456 | } | |
457 | ||
458 | ||
459 | /******************************************** | |
460 | * get_bus_freq | |
461 | * return PLB bus freq in Hz | |
462 | *********************************************/ | |
463 | ulong get_bus_freq (ulong dummy) | |
464 | { | |
465 | ulong val; | |
466 | ||
b867d705 | 467 | #if defined(CONFIG_405GP) || defined(CONFIG_405CR) || defined(CONFIG_405) || defined(CONFIG_440) || defined(CONFIG_405EP) |
c609719b WD |
468 | sys_info_t sys_info; |
469 | ||
470 | get_sys_info (&sys_info); | |
471 | val = sys_info.freqPLB; | |
472 | ||
473 | #elif defined(CONFIG_IOP480) | |
474 | ||
475 | val = 66; | |
476 | ||
477 | #else | |
478 | # error get_bus_freq() not implemented | |
479 | #endif | |
480 | ||
481 | return val; | |
482 | } |