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638ee2db LC |
1 | /***************************************************************************** |
2 | * Copyright 2003 - 2008 Broadcom Corporation. All rights reserved. | |
3 | * | |
4 | * Unless you and Broadcom execute a separate written software license | |
5 | * agreement governing use of this software, this software is licensed to you | |
6 | * under the terms of the GNU General Public License version 2, available at | |
7 | * http://www.broadcom.com/licenses/GPLv2.php (the "GPL"). | |
8 | * | |
9 | * Notwithstanding the above, under no circumstances may you combine this | |
10 | * software in any way with any other Broadcom software provided under a | |
11 | * license other than the GPL, without Broadcom's express prior written | |
12 | * consent. | |
13 | *****************************************************************************/ | |
14 | ||
15 | /****************************************************************************/ | |
16 | /** | |
17 | * @file chipcHw.c | |
18 | * | |
19 | * @brief Low level Various CHIP clock controlling routines | |
20 | * | |
21 | * @note | |
22 | * | |
23 | * These routines provide basic clock controlling functionality only. | |
24 | */ | |
25 | /****************************************************************************/ | |
26 | ||
27 | /* ---- Include Files ---------------------------------------------------- */ | |
28 | ||
29 | #include <csp/errno.h> | |
30 | #include <csp/stdint.h> | |
31 | #include <csp/module.h> | |
32 | ||
33 | #include <mach/csp/chipcHw_def.h> | |
34 | #include <mach/csp/chipcHw_inline.h> | |
35 | ||
36 | #include <csp/reg.h> | |
37 | #include <csp/delay.h> | |
38 | ||
39 | /* ---- Private Constants and Types --------------------------------------- */ | |
40 | ||
41 | /* VPM alignment algorithm uses this */ | |
42 | #define MAX_PHASE_ADJUST_COUNT 0xFFFF /* Max number of times allowed to adjust the phase */ | |
43 | #define MAX_PHASE_ALIGN_ATTEMPTS 10 /* Max number of attempt to align the phase */ | |
44 | ||
45 | /* Local definition of clock type */ | |
46 | #define PLL_CLOCK 1 /* PLL Clock */ | |
47 | #define NON_PLL_CLOCK 2 /* Divider clock */ | |
48 | ||
49 | static int chipcHw_divide(int num, int denom) | |
50 | __attribute__ ((section(".aramtext"))); | |
51 | ||
52 | /****************************************************************************/ | |
53 | /** | |
54 | * @brief Set clock fequency for miscellaneous configurable clocks | |
55 | * | |
56 | * This function sets clock frequency | |
57 | * | |
58 | * @return Configured clock frequency in hertz | |
59 | * | |
60 | */ | |
61 | /****************************************************************************/ | |
62 | chipcHw_freq chipcHw_getClockFrequency(chipcHw_CLOCK_e clock /* [ IN ] Configurable clock */ | |
63 | ) { | |
64 | volatile uint32_t *pPLLReg = (uint32_t *) 0x0; | |
65 | volatile uint32_t *pClockCtrl = (uint32_t *) 0x0; | |
66 | volatile uint32_t *pDependentClock = (uint32_t *) 0x0; | |
67 | uint32_t vcoFreqPll1Hz = 0; /* Effective VCO frequency for PLL1 in Hz */ | |
68 | uint32_t vcoFreqPll2Hz = 0; /* Effective VCO frequency for PLL2 in Hz */ | |
69 | uint32_t dependentClockType = 0; | |
70 | uint32_t vcoHz = 0; | |
71 | ||
72 | /* Get VCO frequencies */ | |
73 | if ((pChipcHw->PLLPreDivider & chipcHw_REG_PLL_PREDIVIDER_NDIV_MODE_MASK) != chipcHw_REG_PLL_PREDIVIDER_NDIV_MODE_INTEGER) { | |
74 | uint64_t adjustFreq = 0; | |
75 | ||
76 | vcoFreqPll1Hz = chipcHw_XTAL_FREQ_Hz * | |
77 | chipcHw_divide(chipcHw_REG_PLL_PREDIVIDER_P1, chipcHw_REG_PLL_PREDIVIDER_P2) * | |
78 | ((pChipcHw->PLLPreDivider & chipcHw_REG_PLL_PREDIVIDER_NDIV_MASK) >> | |
79 | chipcHw_REG_PLL_PREDIVIDER_NDIV_SHIFT); | |
80 | ||
81 | /* Adjusted frequency due to chipcHw_REG_PLL_DIVIDER_NDIV_f_SS */ | |
82 | adjustFreq = (uint64_t) chipcHw_XTAL_FREQ_Hz * | |
83 | (uint64_t) chipcHw_REG_PLL_DIVIDER_NDIV_f_SS * | |
84 | chipcHw_divide(chipcHw_REG_PLL_PREDIVIDER_P1, (chipcHw_REG_PLL_PREDIVIDER_P2 * (uint64_t) chipcHw_REG_PLL_DIVIDER_FRAC)); | |
85 | vcoFreqPll1Hz += (uint32_t) adjustFreq; | |
86 | } else { | |
87 | vcoFreqPll1Hz = chipcHw_XTAL_FREQ_Hz * | |
88 | chipcHw_divide(chipcHw_REG_PLL_PREDIVIDER_P1, chipcHw_REG_PLL_PREDIVIDER_P2) * | |
89 | ((pChipcHw->PLLPreDivider & chipcHw_REG_PLL_PREDIVIDER_NDIV_MASK) >> | |
90 | chipcHw_REG_PLL_PREDIVIDER_NDIV_SHIFT); | |
91 | } | |
92 | vcoFreqPll2Hz = | |
93 | chipcHw_XTAL_FREQ_Hz * | |
94 | chipcHw_divide(chipcHw_REG_PLL_PREDIVIDER_P1, chipcHw_REG_PLL_PREDIVIDER_P2) * | |
95 | ((pChipcHw->PLLPreDivider2 & chipcHw_REG_PLL_PREDIVIDER_NDIV_MASK) >> | |
96 | chipcHw_REG_PLL_PREDIVIDER_NDIV_SHIFT); | |
97 | ||
98 | switch (clock) { | |
99 | case chipcHw_CLOCK_DDR: | |
100 | pPLLReg = &pChipcHw->DDRClock; | |
101 | vcoHz = vcoFreqPll1Hz; | |
102 | break; | |
103 | case chipcHw_CLOCK_ARM: | |
104 | pPLLReg = &pChipcHw->ARMClock; | |
105 | vcoHz = vcoFreqPll1Hz; | |
106 | break; | |
107 | case chipcHw_CLOCK_ESW: | |
108 | pPLLReg = &pChipcHw->ESWClock; | |
109 | vcoHz = vcoFreqPll1Hz; | |
110 | break; | |
111 | case chipcHw_CLOCK_VPM: | |
112 | pPLLReg = &pChipcHw->VPMClock; | |
113 | vcoHz = vcoFreqPll1Hz; | |
114 | break; | |
115 | case chipcHw_CLOCK_ESW125: | |
116 | pPLLReg = &pChipcHw->ESW125Clock; | |
117 | vcoHz = vcoFreqPll1Hz; | |
118 | break; | |
119 | case chipcHw_CLOCK_UART: | |
120 | pPLLReg = &pChipcHw->UARTClock; | |
121 | vcoHz = vcoFreqPll1Hz; | |
122 | break; | |
123 | case chipcHw_CLOCK_SDIO0: | |
124 | pPLLReg = &pChipcHw->SDIO0Clock; | |
125 | vcoHz = vcoFreqPll1Hz; | |
126 | break; | |
127 | case chipcHw_CLOCK_SDIO1: | |
128 | pPLLReg = &pChipcHw->SDIO1Clock; | |
129 | vcoHz = vcoFreqPll1Hz; | |
130 | break; | |
131 | case chipcHw_CLOCK_SPI: | |
132 | pPLLReg = &pChipcHw->SPIClock; | |
133 | vcoHz = vcoFreqPll1Hz; | |
134 | break; | |
135 | case chipcHw_CLOCK_ETM: | |
136 | pPLLReg = &pChipcHw->ETMClock; | |
137 | vcoHz = vcoFreqPll1Hz; | |
138 | break; | |
139 | case chipcHw_CLOCK_USB: | |
140 | pPLLReg = &pChipcHw->USBClock; | |
141 | vcoHz = vcoFreqPll2Hz; | |
142 | break; | |
143 | case chipcHw_CLOCK_LCD: | |
144 | pPLLReg = &pChipcHw->LCDClock; | |
145 | vcoHz = vcoFreqPll2Hz; | |
146 | break; | |
147 | case chipcHw_CLOCK_APM: | |
148 | pPLLReg = &pChipcHw->APMClock; | |
149 | vcoHz = vcoFreqPll2Hz; | |
150 | break; | |
151 | case chipcHw_CLOCK_BUS: | |
152 | pClockCtrl = &pChipcHw->ACLKClock; | |
153 | pDependentClock = &pChipcHw->ARMClock; | |
154 | vcoHz = vcoFreqPll1Hz; | |
155 | dependentClockType = PLL_CLOCK; | |
156 | break; | |
157 | case chipcHw_CLOCK_OTP: | |
158 | pClockCtrl = &pChipcHw->OTPClock; | |
159 | break; | |
160 | case chipcHw_CLOCK_I2C: | |
161 | pClockCtrl = &pChipcHw->I2CClock; | |
162 | break; | |
163 | case chipcHw_CLOCK_I2S0: | |
164 | pClockCtrl = &pChipcHw->I2S0Clock; | |
165 | break; | |
166 | case chipcHw_CLOCK_RTBUS: | |
167 | pClockCtrl = &pChipcHw->RTBUSClock; | |
168 | pDependentClock = &pChipcHw->ACLKClock; | |
169 | dependentClockType = NON_PLL_CLOCK; | |
170 | break; | |
171 | case chipcHw_CLOCK_APM100: | |
172 | pClockCtrl = &pChipcHw->APM100Clock; | |
173 | pDependentClock = &pChipcHw->APMClock; | |
174 | vcoHz = vcoFreqPll2Hz; | |
175 | dependentClockType = PLL_CLOCK; | |
176 | break; | |
177 | case chipcHw_CLOCK_TSC: | |
178 | pClockCtrl = &pChipcHw->TSCClock; | |
179 | break; | |
180 | case chipcHw_CLOCK_LED: | |
181 | pClockCtrl = &pChipcHw->LEDClock; | |
182 | break; | |
183 | case chipcHw_CLOCK_I2S1: | |
184 | pClockCtrl = &pChipcHw->I2S1Clock; | |
185 | break; | |
186 | } | |
187 | ||
188 | if (pPLLReg) { | |
189 | /* Obtain PLL clock frequency */ | |
190 | if (*pPLLReg & chipcHw_REG_PLL_CLOCK_BYPASS_SELECT) { | |
191 | /* Return crystal clock frequency when bypassed */ | |
192 | return chipcHw_XTAL_FREQ_Hz; | |
193 | } else if (clock == chipcHw_CLOCK_DDR) { | |
194 | /* DDR frequency is configured in PLLDivider register */ | |
195 | return chipcHw_divide (vcoHz, (((pChipcHw->PLLDivider & 0xFF000000) >> 24) ? ((pChipcHw->PLLDivider & 0xFF000000) >> 24) : 256)); | |
196 | } else { | |
197 | /* From chip revision number B0, LCD clock is internally divided by 2 */ | |
198 | if ((pPLLReg == &pChipcHw->LCDClock) && (chipcHw_getChipRevisionNumber() != chipcHw_REV_NUMBER_A0)) { | |
199 | vcoHz >>= 1; | |
200 | } | |
201 | /* Obtain PLL clock frequency using VCO dividers */ | |
202 | return chipcHw_divide(vcoHz, ((*pPLLReg & chipcHw_REG_PLL_CLOCK_MDIV_MASK) ? (*pPLLReg & chipcHw_REG_PLL_CLOCK_MDIV_MASK) : 256)); | |
203 | } | |
204 | } else if (pClockCtrl) { | |
205 | /* Obtain divider clock frequency */ | |
206 | uint32_t div; | |
207 | uint32_t freq = 0; | |
208 | ||
209 | if (*pClockCtrl & chipcHw_REG_DIV_CLOCK_BYPASS_SELECT) { | |
210 | /* Return crystal clock frequency when bypassed */ | |
211 | return chipcHw_XTAL_FREQ_Hz; | |
212 | } else if (pDependentClock) { | |
213 | /* Identify the dependent clock frequency */ | |
214 | switch (dependentClockType) { | |
215 | case PLL_CLOCK: | |
216 | if (*pDependentClock & chipcHw_REG_PLL_CLOCK_BYPASS_SELECT) { | |
217 | /* Use crystal clock frequency when dependent PLL clock is bypassed */ | |
218 | freq = chipcHw_XTAL_FREQ_Hz; | |
219 | } else { | |
220 | /* Obtain PLL clock frequency using VCO dividers */ | |
221 | div = *pDependentClock & chipcHw_REG_PLL_CLOCK_MDIV_MASK; | |
222 | freq = div ? chipcHw_divide(vcoHz, div) : 0; | |
223 | } | |
224 | break; | |
225 | case NON_PLL_CLOCK: | |
226 | if (pDependentClock == (uint32_t *) &pChipcHw->ACLKClock) { | |
227 | freq = chipcHw_getClockFrequency (chipcHw_CLOCK_BUS); | |
228 | } else { | |
229 | if (*pDependentClock & chipcHw_REG_DIV_CLOCK_BYPASS_SELECT) { | |
230 | /* Use crystal clock frequency when dependent divider clock is bypassed */ | |
231 | freq = chipcHw_XTAL_FREQ_Hz; | |
232 | } else { | |
233 | /* Obtain divider clock frequency using XTAL dividers */ | |
234 | div = *pDependentClock & chipcHw_REG_DIV_CLOCK_DIV_MASK; | |
235 | freq = chipcHw_divide (chipcHw_XTAL_FREQ_Hz, (div ? div : 256)); | |
236 | } | |
237 | } | |
238 | break; | |
239 | } | |
240 | } else { | |
241 | /* Dependent on crystal clock */ | |
242 | freq = chipcHw_XTAL_FREQ_Hz; | |
243 | } | |
244 | ||
245 | div = *pClockCtrl & chipcHw_REG_DIV_CLOCK_DIV_MASK; | |
246 | return chipcHw_divide(freq, (div ? div : 256)); | |
247 | } | |
248 | return 0; | |
249 | } | |
250 | ||
251 | /****************************************************************************/ | |
252 | /** | |
253 | * @brief Set clock fequency for miscellaneous configurable clocks | |
254 | * | |
255 | * This function sets clock frequency | |
256 | * | |
257 | * @return Configured clock frequency in Hz | |
258 | * | |
259 | */ | |
260 | /****************************************************************************/ | |
261 | chipcHw_freq chipcHw_setClockFrequency(chipcHw_CLOCK_e clock, /* [ IN ] Configurable clock */ | |
262 | uint32_t freq /* [ IN ] Clock frequency in Hz */ | |
263 | ) { | |
264 | volatile uint32_t *pPLLReg = (uint32_t *) 0x0; | |
265 | volatile uint32_t *pClockCtrl = (uint32_t *) 0x0; | |
266 | volatile uint32_t *pDependentClock = (uint32_t *) 0x0; | |
267 | uint32_t vcoFreqPll1Hz = 0; /* Effective VCO frequency for PLL1 in Hz */ | |
268 | uint32_t desVcoFreqPll1Hz = 0; /* Desired VCO frequency for PLL1 in Hz */ | |
269 | uint32_t vcoFreqPll2Hz = 0; /* Effective VCO frequency for PLL2 in Hz */ | |
270 | uint32_t dependentClockType = 0; | |
271 | uint32_t vcoHz = 0; | |
272 | uint32_t desVcoHz = 0; | |
273 | ||
274 | /* Get VCO frequencies */ | |
275 | if ((pChipcHw->PLLPreDivider & chipcHw_REG_PLL_PREDIVIDER_NDIV_MODE_MASK) != chipcHw_REG_PLL_PREDIVIDER_NDIV_MODE_INTEGER) { | |
276 | uint64_t adjustFreq = 0; | |
277 | ||
278 | vcoFreqPll1Hz = chipcHw_XTAL_FREQ_Hz * | |
279 | chipcHw_divide(chipcHw_REG_PLL_PREDIVIDER_P1, chipcHw_REG_PLL_PREDIVIDER_P2) * | |
280 | ((pChipcHw->PLLPreDivider & chipcHw_REG_PLL_PREDIVIDER_NDIV_MASK) >> | |
281 | chipcHw_REG_PLL_PREDIVIDER_NDIV_SHIFT); | |
282 | ||
283 | /* Adjusted frequency due to chipcHw_REG_PLL_DIVIDER_NDIV_f_SS */ | |
284 | adjustFreq = (uint64_t) chipcHw_XTAL_FREQ_Hz * | |
285 | (uint64_t) chipcHw_REG_PLL_DIVIDER_NDIV_f_SS * | |
286 | chipcHw_divide(chipcHw_REG_PLL_PREDIVIDER_P1, (chipcHw_REG_PLL_PREDIVIDER_P2 * (uint64_t) chipcHw_REG_PLL_DIVIDER_FRAC)); | |
287 | vcoFreqPll1Hz += (uint32_t) adjustFreq; | |
288 | ||
289 | /* Desired VCO frequency */ | |
290 | desVcoFreqPll1Hz = chipcHw_XTAL_FREQ_Hz * | |
291 | chipcHw_divide(chipcHw_REG_PLL_PREDIVIDER_P1, chipcHw_REG_PLL_PREDIVIDER_P2) * | |
292 | (((pChipcHw->PLLPreDivider & chipcHw_REG_PLL_PREDIVIDER_NDIV_MASK) >> | |
293 | chipcHw_REG_PLL_PREDIVIDER_NDIV_SHIFT) + 1); | |
294 | } else { | |
295 | vcoFreqPll1Hz = desVcoFreqPll1Hz = chipcHw_XTAL_FREQ_Hz * | |
296 | chipcHw_divide(chipcHw_REG_PLL_PREDIVIDER_P1, chipcHw_REG_PLL_PREDIVIDER_P2) * | |
297 | ((pChipcHw->PLLPreDivider & chipcHw_REG_PLL_PREDIVIDER_NDIV_MASK) >> | |
298 | chipcHw_REG_PLL_PREDIVIDER_NDIV_SHIFT); | |
299 | } | |
300 | vcoFreqPll2Hz = chipcHw_XTAL_FREQ_Hz * chipcHw_divide(chipcHw_REG_PLL_PREDIVIDER_P1, chipcHw_REG_PLL_PREDIVIDER_P2) * | |
301 | ((pChipcHw->PLLPreDivider2 & chipcHw_REG_PLL_PREDIVIDER_NDIV_MASK) >> | |
302 | chipcHw_REG_PLL_PREDIVIDER_NDIV_SHIFT); | |
303 | ||
304 | switch (clock) { | |
305 | case chipcHw_CLOCK_DDR: | |
306 | /* Configure the DDR_ctrl:BUS ratio settings */ | |
307 | { | |
308 | REG_LOCAL_IRQ_SAVE; | |
309 | /* Dvide DDR_phy by two to obtain DDR_ctrl clock */ | |
310 | pChipcHw->DDRClock = (pChipcHw->DDRClock & ~chipcHw_REG_PLL_CLOCK_TO_BUS_RATIO_MASK) | ((((freq / 2) / chipcHw_getClockFrequency(chipcHw_CLOCK_BUS)) - 1) | |
311 | << chipcHw_REG_PLL_CLOCK_TO_BUS_RATIO_SHIFT); | |
312 | REG_LOCAL_IRQ_RESTORE; | |
313 | } | |
314 | pPLLReg = &pChipcHw->DDRClock; | |
315 | vcoHz = vcoFreqPll1Hz; | |
316 | desVcoHz = desVcoFreqPll1Hz; | |
317 | break; | |
318 | case chipcHw_CLOCK_ARM: | |
319 | pPLLReg = &pChipcHw->ARMClock; | |
320 | vcoHz = vcoFreqPll1Hz; | |
321 | desVcoHz = desVcoFreqPll1Hz; | |
322 | break; | |
323 | case chipcHw_CLOCK_ESW: | |
324 | pPLLReg = &pChipcHw->ESWClock; | |
325 | vcoHz = vcoFreqPll1Hz; | |
326 | desVcoHz = desVcoFreqPll1Hz; | |
327 | break; | |
328 | case chipcHw_CLOCK_VPM: | |
329 | /* Configure the VPM:BUS ratio settings */ | |
330 | { | |
331 | REG_LOCAL_IRQ_SAVE; | |
332 | pChipcHw->VPMClock = (pChipcHw->VPMClock & ~chipcHw_REG_PLL_CLOCK_TO_BUS_RATIO_MASK) | ((chipcHw_divide (freq, chipcHw_getClockFrequency(chipcHw_CLOCK_BUS)) - 1) | |
333 | << chipcHw_REG_PLL_CLOCK_TO_BUS_RATIO_SHIFT); | |
334 | REG_LOCAL_IRQ_RESTORE; | |
335 | } | |
336 | pPLLReg = &pChipcHw->VPMClock; | |
337 | vcoHz = vcoFreqPll1Hz; | |
338 | desVcoHz = desVcoFreqPll1Hz; | |
339 | break; | |
340 | case chipcHw_CLOCK_ESW125: | |
341 | pPLLReg = &pChipcHw->ESW125Clock; | |
342 | vcoHz = vcoFreqPll1Hz; | |
343 | desVcoHz = desVcoFreqPll1Hz; | |
344 | break; | |
345 | case chipcHw_CLOCK_UART: | |
346 | pPLLReg = &pChipcHw->UARTClock; | |
347 | vcoHz = vcoFreqPll1Hz; | |
348 | desVcoHz = desVcoFreqPll1Hz; | |
349 | break; | |
350 | case chipcHw_CLOCK_SDIO0: | |
351 | pPLLReg = &pChipcHw->SDIO0Clock; | |
352 | vcoHz = vcoFreqPll1Hz; | |
353 | desVcoHz = desVcoFreqPll1Hz; | |
354 | break; | |
355 | case chipcHw_CLOCK_SDIO1: | |
356 | pPLLReg = &pChipcHw->SDIO1Clock; | |
357 | vcoHz = vcoFreqPll1Hz; | |
358 | desVcoHz = desVcoFreqPll1Hz; | |
359 | break; | |
360 | case chipcHw_CLOCK_SPI: | |
361 | pPLLReg = &pChipcHw->SPIClock; | |
362 | vcoHz = vcoFreqPll1Hz; | |
363 | desVcoHz = desVcoFreqPll1Hz; | |
364 | break; | |
365 | case chipcHw_CLOCK_ETM: | |
366 | pPLLReg = &pChipcHw->ETMClock; | |
367 | vcoHz = vcoFreqPll1Hz; | |
368 | desVcoHz = desVcoFreqPll1Hz; | |
369 | break; | |
370 | case chipcHw_CLOCK_USB: | |
371 | pPLLReg = &pChipcHw->USBClock; | |
372 | vcoHz = vcoFreqPll2Hz; | |
373 | desVcoHz = vcoFreqPll2Hz; | |
374 | break; | |
375 | case chipcHw_CLOCK_LCD: | |
376 | pPLLReg = &pChipcHw->LCDClock; | |
377 | vcoHz = vcoFreqPll2Hz; | |
378 | desVcoHz = vcoFreqPll2Hz; | |
379 | break; | |
380 | case chipcHw_CLOCK_APM: | |
381 | pPLLReg = &pChipcHw->APMClock; | |
382 | vcoHz = vcoFreqPll2Hz; | |
383 | desVcoHz = vcoFreqPll2Hz; | |
384 | break; | |
385 | case chipcHw_CLOCK_BUS: | |
386 | pClockCtrl = &pChipcHw->ACLKClock; | |
387 | pDependentClock = &pChipcHw->ARMClock; | |
388 | vcoHz = vcoFreqPll1Hz; | |
389 | desVcoHz = desVcoFreqPll1Hz; | |
390 | dependentClockType = PLL_CLOCK; | |
391 | break; | |
392 | case chipcHw_CLOCK_OTP: | |
393 | pClockCtrl = &pChipcHw->OTPClock; | |
394 | break; | |
395 | case chipcHw_CLOCK_I2C: | |
396 | pClockCtrl = &pChipcHw->I2CClock; | |
397 | break; | |
398 | case chipcHw_CLOCK_I2S0: | |
399 | pClockCtrl = &pChipcHw->I2S0Clock; | |
400 | break; | |
401 | case chipcHw_CLOCK_RTBUS: | |
402 | pClockCtrl = &pChipcHw->RTBUSClock; | |
403 | pDependentClock = &pChipcHw->ACLKClock; | |
404 | dependentClockType = NON_PLL_CLOCK; | |
405 | break; | |
406 | case chipcHw_CLOCK_APM100: | |
407 | pClockCtrl = &pChipcHw->APM100Clock; | |
408 | pDependentClock = &pChipcHw->APMClock; | |
409 | vcoHz = vcoFreqPll2Hz; | |
410 | desVcoHz = vcoFreqPll2Hz; | |
411 | dependentClockType = PLL_CLOCK; | |
412 | break; | |
413 | case chipcHw_CLOCK_TSC: | |
414 | pClockCtrl = &pChipcHw->TSCClock; | |
415 | break; | |
416 | case chipcHw_CLOCK_LED: | |
417 | pClockCtrl = &pChipcHw->LEDClock; | |
418 | break; | |
419 | case chipcHw_CLOCK_I2S1: | |
420 | pClockCtrl = &pChipcHw->I2S1Clock; | |
421 | break; | |
422 | } | |
423 | ||
424 | if (pPLLReg) { | |
425 | /* Select XTAL as bypass source */ | |
426 | reg32_modify_and(pPLLReg, ~chipcHw_REG_PLL_CLOCK_SOURCE_GPIO); | |
427 | reg32_modify_or(pPLLReg, chipcHw_REG_PLL_CLOCK_BYPASS_SELECT); | |
428 | /* For DDR settings use only the PLL divider clock */ | |
429 | if (pPLLReg == &pChipcHw->DDRClock) { | |
430 | /* Set M1DIV for PLL1, which controls the DDR clock */ | |
431 | reg32_write(&pChipcHw->PLLDivider, (pChipcHw->PLLDivider & 0x00FFFFFF) | ((chipcHw_REG_PLL_DIVIDER_MDIV (desVcoHz, freq)) << 24)); | |
432 | /* Calculate expected frequency */ | |
433 | freq = chipcHw_divide(vcoHz, (((pChipcHw->PLLDivider & 0xFF000000) >> 24) ? ((pChipcHw->PLLDivider & 0xFF000000) >> 24) : 256)); | |
434 | } else { | |
435 | /* From chip revision number B0, LCD clock is internally divided by 2 */ | |
436 | if ((pPLLReg == &pChipcHw->LCDClock) && (chipcHw_getChipRevisionNumber() != chipcHw_REV_NUMBER_A0)) { | |
437 | desVcoHz >>= 1; | |
438 | vcoHz >>= 1; | |
439 | } | |
440 | /* Set MDIV to change the frequency */ | |
441 | reg32_modify_and(pPLLReg, ~(chipcHw_REG_PLL_CLOCK_MDIV_MASK)); | |
442 | reg32_modify_or(pPLLReg, chipcHw_REG_PLL_DIVIDER_MDIV(desVcoHz, freq)); | |
443 | /* Calculate expected frequency */ | |
444 | freq = chipcHw_divide(vcoHz, ((*(pPLLReg) & chipcHw_REG_PLL_CLOCK_MDIV_MASK) ? (*(pPLLReg) & chipcHw_REG_PLL_CLOCK_MDIV_MASK) : 256)); | |
445 | } | |
446 | /* Wait for for atleast 200ns as per the protocol to change frequency */ | |
447 | udelay(1); | |
448 | /* Do not bypass */ | |
449 | reg32_modify_and(pPLLReg, ~chipcHw_REG_PLL_CLOCK_BYPASS_SELECT); | |
450 | /* Return the configured frequency */ | |
451 | return freq; | |
452 | } else if (pClockCtrl) { | |
453 | uint32_t divider = 0; | |
454 | ||
455 | /* Divider clock should not be bypassed */ | |
456 | reg32_modify_and(pClockCtrl, | |
457 | ~chipcHw_REG_DIV_CLOCK_BYPASS_SELECT); | |
458 | ||
459 | /* Identify the clock source */ | |
460 | if (pDependentClock) { | |
461 | switch (dependentClockType) { | |
462 | case PLL_CLOCK: | |
463 | divider = chipcHw_divide(chipcHw_divide (desVcoHz, (*pDependentClock & chipcHw_REG_PLL_CLOCK_MDIV_MASK)), freq); | |
464 | break; | |
465 | case NON_PLL_CLOCK: | |
466 | { | |
467 | uint32_t sourceClock = 0; | |
468 | ||
469 | if (pDependentClock == (uint32_t *) &pChipcHw->ACLKClock) { | |
470 | sourceClock = chipcHw_getClockFrequency (chipcHw_CLOCK_BUS); | |
471 | } else { | |
472 | uint32_t div = *pDependentClock & chipcHw_REG_DIV_CLOCK_DIV_MASK; | |
473 | sourceClock = chipcHw_divide (chipcHw_XTAL_FREQ_Hz, ((div) ? div : 256)); | |
474 | } | |
475 | divider = chipcHw_divide(sourceClock, freq); | |
476 | } | |
477 | break; | |
478 | } | |
479 | } else { | |
480 | divider = chipcHw_divide(chipcHw_XTAL_FREQ_Hz, freq); | |
481 | } | |
482 | ||
483 | if (divider) { | |
484 | REG_LOCAL_IRQ_SAVE; | |
485 | /* Set the divider to obtain the required frequency */ | |
486 | *pClockCtrl = (*pClockCtrl & (~chipcHw_REG_DIV_CLOCK_DIV_MASK)) | (((divider > 256) ? chipcHw_REG_DIV_CLOCK_DIV_256 : divider) & chipcHw_REG_DIV_CLOCK_DIV_MASK); | |
487 | REG_LOCAL_IRQ_RESTORE; | |
488 | return freq; | |
489 | } | |
490 | } | |
491 | ||
492 | return 0; | |
493 | } | |
494 | ||
495 | EXPORT_SYMBOL(chipcHw_setClockFrequency); | |
496 | ||
497 | /****************************************************************************/ | |
498 | /** | |
499 | * @brief Set VPM clock in sync with BUS clock for Chip Rev #A0 | |
500 | * | |
501 | * This function does the phase adjustment between VPM and BUS clock | |
502 | * | |
503 | * @return >= 0 : On success (# of adjustment required) | |
504 | * -1 : On failure | |
505 | * | |
506 | */ | |
507 | /****************************************************************************/ | |
508 | static int vpmPhaseAlignA0(void) | |
509 | { | |
510 | uint32_t phaseControl; | |
511 | uint32_t phaseValue; | |
512 | uint32_t prevPhaseComp; | |
513 | int iter = 0; | |
514 | int adjustCount = 0; | |
515 | int count = 0; | |
516 | ||
517 | for (iter = 0; (iter < MAX_PHASE_ALIGN_ATTEMPTS) && (adjustCount < MAX_PHASE_ADJUST_COUNT); iter++) { | |
518 | phaseControl = (pChipcHw->VPMClock & chipcHw_REG_PLL_CLOCK_PHASE_CONTROL_MASK) >> chipcHw_REG_PLL_CLOCK_PHASE_CONTROL_SHIFT; | |
519 | phaseValue = 0; | |
520 | prevPhaseComp = 0; | |
521 | ||
522 | /* Step 1: Look for falling PH_COMP transition */ | |
523 | ||
524 | /* Read the contents of VPM Clock resgister */ | |
525 | phaseValue = pChipcHw->VPMClock; | |
526 | do { | |
527 | /* Store previous value of phase comparator */ | |
528 | prevPhaseComp = phaseValue & chipcHw_REG_PLL_CLOCK_PHASE_COMP; | |
529 | /* Change the value of PH_CTRL. */ | |
530 | reg32_write(&pChipcHw->VPMClock, (pChipcHw->VPMClock & (~chipcHw_REG_PLL_CLOCK_PHASE_CONTROL_MASK)) | (phaseControl << chipcHw_REG_PLL_CLOCK_PHASE_CONTROL_SHIFT)); | |
531 | /* Wait atleast 20 ns */ | |
532 | udelay(1); | |
533 | /* Toggle the LOAD_CH after phase control is written. */ | |
534 | pChipcHw->VPMClock ^= chipcHw_REG_PLL_CLOCK_PHASE_UPDATE_ENABLE; | |
535 | /* Read the contents of VPM Clock resgister. */ | |
536 | phaseValue = pChipcHw->VPMClock; | |
537 | ||
538 | if ((phaseValue & chipcHw_REG_PLL_CLOCK_PHASE_COMP) == 0x0) { | |
539 | phaseControl = (0x3F & (phaseControl - 1)); | |
540 | } else { | |
541 | /* Increment to the Phase count value for next write, if Phase is not stable. */ | |
542 | phaseControl = (0x3F & (phaseControl + 1)); | |
543 | } | |
544 | /* Count number of adjustment made */ | |
545 | adjustCount++; | |
546 | } while (((prevPhaseComp == (phaseValue & chipcHw_REG_PLL_CLOCK_PHASE_COMP)) || /* Look for a transition */ | |
547 | ((phaseValue & chipcHw_REG_PLL_CLOCK_PHASE_COMP) != 0x0)) && /* Look for a falling edge */ | |
548 | (adjustCount < MAX_PHASE_ADJUST_COUNT) /* Do not exceed the limit while trying */ | |
549 | ); | |
550 | ||
551 | if (adjustCount >= MAX_PHASE_ADJUST_COUNT) { | |
552 | /* Failed to align VPM phase after MAX_PHASE_ADJUST_COUNT tries */ | |
553 | return -1; | |
554 | } | |
555 | ||
556 | /* Step 2: Keep moving forward to make sure falling PH_COMP transition was valid */ | |
557 | ||
558 | for (count = 0; (count < 5) && ((phaseValue & chipcHw_REG_PLL_CLOCK_PHASE_COMP) == 0); count++) { | |
559 | phaseControl = (0x3F & (phaseControl + 1)); | |
560 | reg32_write(&pChipcHw->VPMClock, (pChipcHw->VPMClock & (~chipcHw_REG_PLL_CLOCK_PHASE_CONTROL_MASK)) | (phaseControl << chipcHw_REG_PLL_CLOCK_PHASE_CONTROL_SHIFT)); | |
561 | /* Wait atleast 20 ns */ | |
562 | udelay(1); | |
563 | /* Toggle the LOAD_CH after phase control is written. */ | |
564 | pChipcHw->VPMClock ^= chipcHw_REG_PLL_CLOCK_PHASE_UPDATE_ENABLE; | |
565 | phaseValue = pChipcHw->VPMClock; | |
566 | /* Count number of adjustment made */ | |
567 | adjustCount++; | |
568 | } | |
569 | ||
570 | if (adjustCount >= MAX_PHASE_ADJUST_COUNT) { | |
571 | /* Failed to align VPM phase after MAX_PHASE_ADJUST_COUNT tries */ | |
572 | return -1; | |
573 | } | |
574 | ||
575 | if (count != 5) { | |
576 | /* Detected false transition */ | |
577 | continue; | |
578 | } | |
579 | ||
580 | /* Step 3: Keep moving backward to make sure falling PH_COMP transition was stable */ | |
581 | ||
582 | for (count = 0; (count < 3) && ((phaseValue & chipcHw_REG_PLL_CLOCK_PHASE_COMP) == 0); count++) { | |
583 | phaseControl = (0x3F & (phaseControl - 1)); | |
584 | reg32_write(&pChipcHw->VPMClock, (pChipcHw->VPMClock & (~chipcHw_REG_PLL_CLOCK_PHASE_CONTROL_MASK)) | (phaseControl << chipcHw_REG_PLL_CLOCK_PHASE_CONTROL_SHIFT)); | |
585 | /* Wait atleast 20 ns */ | |
586 | udelay(1); | |
587 | /* Toggle the LOAD_CH after phase control is written. */ | |
588 | pChipcHw->VPMClock ^= chipcHw_REG_PLL_CLOCK_PHASE_UPDATE_ENABLE; | |
589 | phaseValue = pChipcHw->VPMClock; | |
590 | /* Count number of adjustment made */ | |
591 | adjustCount++; | |
592 | } | |
593 | ||
594 | if (adjustCount >= MAX_PHASE_ADJUST_COUNT) { | |
595 | /* Failed to align VPM phase after MAX_PHASE_ADJUST_COUNT tries */ | |
596 | return -1; | |
597 | } | |
598 | ||
599 | if (count != 3) { | |
600 | /* Detected noisy transition */ | |
601 | continue; | |
602 | } | |
603 | ||
604 | /* Step 4: Keep moving backward before the original transition took place. */ | |
605 | ||
606 | for (count = 0; (count < 5); count++) { | |
607 | phaseControl = (0x3F & (phaseControl - 1)); | |
608 | reg32_write(&pChipcHw->VPMClock, (pChipcHw->VPMClock & (~chipcHw_REG_PLL_CLOCK_PHASE_CONTROL_MASK)) | (phaseControl << chipcHw_REG_PLL_CLOCK_PHASE_CONTROL_SHIFT)); | |
609 | /* Wait atleast 20 ns */ | |
610 | udelay(1); | |
611 | /* Toggle the LOAD_CH after phase control is written. */ | |
612 | pChipcHw->VPMClock ^= chipcHw_REG_PLL_CLOCK_PHASE_UPDATE_ENABLE; | |
613 | phaseValue = pChipcHw->VPMClock; | |
614 | /* Count number of adjustment made */ | |
615 | adjustCount++; | |
616 | } | |
617 | ||
618 | if (adjustCount >= MAX_PHASE_ADJUST_COUNT) { | |
619 | /* Failed to align VPM phase after MAX_PHASE_ADJUST_COUNT tries */ | |
620 | return -1; | |
621 | } | |
622 | ||
623 | if ((phaseValue & chipcHw_REG_PLL_CLOCK_PHASE_COMP) == 0) { | |
624 | /* Detected false transition */ | |
625 | continue; | |
626 | } | |
627 | ||
628 | /* Step 5: Re discover the valid transition */ | |
629 | ||
630 | do { | |
631 | /* Store previous value of phase comparator */ | |
632 | prevPhaseComp = phaseValue; | |
633 | /* Change the value of PH_CTRL. */ | |
634 | reg32_write(&pChipcHw->VPMClock, (pChipcHw->VPMClock & (~chipcHw_REG_PLL_CLOCK_PHASE_CONTROL_MASK)) | (phaseControl << chipcHw_REG_PLL_CLOCK_PHASE_CONTROL_SHIFT)); | |
635 | /* Wait atleast 20 ns */ | |
636 | udelay(1); | |
637 | /* Toggle the LOAD_CH after phase control is written. */ | |
638 | pChipcHw->VPMClock ^= | |
639 | chipcHw_REG_PLL_CLOCK_PHASE_UPDATE_ENABLE; | |
640 | /* Read the contents of VPM Clock resgister. */ | |
641 | phaseValue = pChipcHw->VPMClock; | |
642 | ||
643 | if ((phaseValue & chipcHw_REG_PLL_CLOCK_PHASE_COMP) == 0x0) { | |
644 | phaseControl = (0x3F & (phaseControl - 1)); | |
645 | } else { | |
646 | /* Increment to the Phase count value for next write, if Phase is not stable. */ | |
647 | phaseControl = (0x3F & (phaseControl + 1)); | |
648 | } | |
649 | ||
650 | /* Count number of adjustment made */ | |
651 | adjustCount++; | |
652 | } while (((prevPhaseComp == (phaseValue & chipcHw_REG_PLL_CLOCK_PHASE_COMP)) || ((phaseValue & chipcHw_REG_PLL_CLOCK_PHASE_COMP) != 0x0)) && (adjustCount < MAX_PHASE_ADJUST_COUNT)); | |
653 | ||
654 | if (adjustCount >= MAX_PHASE_ADJUST_COUNT) { | |
655 | /* Failed to align VPM phase after MAX_PHASE_ADJUST_COUNT tries */ | |
656 | return -1; | |
657 | } else { | |
658 | /* Valid phase must have detected */ | |
659 | break; | |
660 | } | |
661 | } | |
662 | ||
663 | /* For VPM Phase should be perfectly aligned. */ | |
664 | phaseControl = (((pChipcHw->VPMClock >> chipcHw_REG_PLL_CLOCK_PHASE_CONTROL_SHIFT) - 1) & 0x3F); | |
665 | { | |
666 | REG_LOCAL_IRQ_SAVE; | |
667 | ||
668 | pChipcHw->VPMClock = (pChipcHw->VPMClock & ~chipcHw_REG_PLL_CLOCK_PHASE_CONTROL_MASK) | (phaseControl << chipcHw_REG_PLL_CLOCK_PHASE_CONTROL_SHIFT); | |
669 | /* Load new phase value */ | |
670 | pChipcHw->VPMClock ^= chipcHw_REG_PLL_CLOCK_PHASE_UPDATE_ENABLE; | |
671 | ||
672 | REG_LOCAL_IRQ_RESTORE; | |
673 | } | |
674 | /* Return the status */ | |
675 | return (int)adjustCount; | |
676 | } | |
677 | ||
678 | /****************************************************************************/ | |
679 | /** | |
680 | * @brief Set VPM clock in sync with BUS clock | |
681 | * | |
682 | * This function does the phase adjustment between VPM and BUS clock | |
683 | * | |
684 | * @return >= 0 : On success (# of adjustment required) | |
685 | * -1 : On failure | |
686 | * | |
687 | */ | |
688 | /****************************************************************************/ | |
689 | int chipcHw_vpmPhaseAlign(void) | |
690 | { | |
691 | ||
692 | if (chipcHw_getChipRevisionNumber() == chipcHw_REV_NUMBER_A0) { | |
693 | return vpmPhaseAlignA0(); | |
694 | } else { | |
695 | uint32_t phaseControl = chipcHw_getVpmPhaseControl(); | |
696 | uint32_t phaseValue = 0; | |
697 | int adjustCount = 0; | |
698 | ||
699 | /* Disable VPM access */ | |
700 | pChipcHw->Spare1 &= ~chipcHw_REG_SPARE1_VPM_BUS_ACCESS_ENABLE; | |
701 | /* Disable HW VPM phase alignment */ | |
702 | chipcHw_vpmHwPhaseAlignDisable(); | |
703 | /* Enable SW VPM phase alignment */ | |
704 | chipcHw_vpmSwPhaseAlignEnable(); | |
705 | /* Adjust VPM phase */ | |
706 | while (adjustCount < MAX_PHASE_ADJUST_COUNT) { | |
707 | phaseValue = chipcHw_getVpmHwPhaseAlignStatus(); | |
708 | ||
709 | /* Adjust phase control value */ | |
710 | if (phaseValue > 0xF) { | |
711 | /* Increment phase control value */ | |
712 | phaseControl++; | |
713 | } else if (phaseValue < 0xF) { | |
714 | /* Decrement phase control value */ | |
715 | phaseControl--; | |
716 | } else { | |
717 | /* Enable VPM access */ | |
718 | pChipcHw->Spare1 |= chipcHw_REG_SPARE1_VPM_BUS_ACCESS_ENABLE; | |
719 | /* Return adjust count */ | |
720 | return adjustCount; | |
721 | } | |
722 | /* Change the value of PH_CTRL. */ | |
723 | reg32_write(&pChipcHw->VPMClock, (pChipcHw->VPMClock & (~chipcHw_REG_PLL_CLOCK_PHASE_CONTROL_MASK)) | (phaseControl << chipcHw_REG_PLL_CLOCK_PHASE_CONTROL_SHIFT)); | |
724 | /* Wait atleast 20 ns */ | |
725 | udelay(1); | |
726 | /* Toggle the LOAD_CH after phase control is written. */ | |
727 | pChipcHw->VPMClock ^= chipcHw_REG_PLL_CLOCK_PHASE_UPDATE_ENABLE; | |
728 | /* Count adjustment */ | |
729 | adjustCount++; | |
730 | } | |
731 | } | |
732 | ||
733 | /* Disable VPM access */ | |
734 | pChipcHw->Spare1 &= ~chipcHw_REG_SPARE1_VPM_BUS_ACCESS_ENABLE; | |
735 | return -1; | |
736 | } | |
737 | ||
738 | /****************************************************************************/ | |
739 | /** | |
740 | * @brief Local Divide function | |
741 | * | |
742 | * This function does the divide | |
743 | * | |
744 | * @return divide value | |
745 | * | |
746 | */ | |
747 | /****************************************************************************/ | |
748 | static int chipcHw_divide(int num, int denom) | |
749 | { | |
750 | int r; | |
751 | int t = 1; | |
752 | ||
753 | /* Shift denom and t up to the largest value to optimize algorithm */ | |
754 | /* t contains the units of each divide */ | |
755 | while ((denom & 0x40000000) == 0) { /* fails if denom=0 */ | |
756 | denom = denom << 1; | |
757 | t = t << 1; | |
758 | } | |
759 | ||
b595076a | 760 | /* Initialize the result */ |
638ee2db LC |
761 | r = 0; |
762 | ||
763 | do { | |
764 | /* Determine if there exists a positive remainder */ | |
765 | if ((num - denom) >= 0) { | |
766 | /* Accumlate t to the result and calculate a new remainder */ | |
767 | num = num - denom; | |
768 | r = r + t; | |
769 | } | |
770 | /* Continue to shift denom and shift t down to 0 */ | |
771 | denom = denom >> 1; | |
772 | t = t >> 1; | |
773 | } while (t != 0); | |
774 | ||
775 | return r; | |
776 | } |