1 /*
2  * Broadcom specific AMBA
3  * ChipCommon Power Management Unit driver
4  *
5  * Copyright 2009, Michael Buesch <m@bues.ch>
6  * Copyright 2007, 2011, Broadcom Corporation
7  * Copyright 2011, 2012, Hauke Mehrtens <hauke@hauke-m.de>
8  *
9  * Licensed under the GNU/GPL. See COPYING for details.
10  */
11 
12 #include "bcma_private.h"
13 #include <linux/export.h>
14 #include <linux/bcma/bcma.h>
15 
bcma_chipco_pll_read(struct bcma_drv_cc * cc,u32 offset)16 u32 bcma_chipco_pll_read(struct bcma_drv_cc *cc, u32 offset)
17 {
18 	bcma_pmu_write32(cc, BCMA_CC_PMU_PLLCTL_ADDR, offset);
19 	bcma_pmu_read32(cc, BCMA_CC_PMU_PLLCTL_ADDR);
20 	return bcma_pmu_read32(cc, BCMA_CC_PMU_PLLCTL_DATA);
21 }
22 EXPORT_SYMBOL_GPL(bcma_chipco_pll_read);
23 
bcma_chipco_pll_write(struct bcma_drv_cc * cc,u32 offset,u32 value)24 void bcma_chipco_pll_write(struct bcma_drv_cc *cc, u32 offset, u32 value)
25 {
26 	bcma_pmu_write32(cc, BCMA_CC_PMU_PLLCTL_ADDR, offset);
27 	bcma_pmu_read32(cc, BCMA_CC_PMU_PLLCTL_ADDR);
28 	bcma_pmu_write32(cc, BCMA_CC_PMU_PLLCTL_DATA, value);
29 }
30 EXPORT_SYMBOL_GPL(bcma_chipco_pll_write);
31 
bcma_chipco_pll_maskset(struct bcma_drv_cc * cc,u32 offset,u32 mask,u32 set)32 void bcma_chipco_pll_maskset(struct bcma_drv_cc *cc, u32 offset, u32 mask,
33 			     u32 set)
34 {
35 	bcma_pmu_write32(cc, BCMA_CC_PMU_PLLCTL_ADDR, offset);
36 	bcma_pmu_read32(cc, BCMA_CC_PMU_PLLCTL_ADDR);
37 	bcma_pmu_maskset32(cc, BCMA_CC_PMU_PLLCTL_DATA, mask, set);
38 }
39 EXPORT_SYMBOL_GPL(bcma_chipco_pll_maskset);
40 
bcma_chipco_chipctl_maskset(struct bcma_drv_cc * cc,u32 offset,u32 mask,u32 set)41 void bcma_chipco_chipctl_maskset(struct bcma_drv_cc *cc,
42 				 u32 offset, u32 mask, u32 set)
43 {
44 	bcma_pmu_write32(cc, BCMA_CC_PMU_CHIPCTL_ADDR, offset);
45 	bcma_pmu_read32(cc, BCMA_CC_PMU_CHIPCTL_ADDR);
46 	bcma_pmu_maskset32(cc, BCMA_CC_PMU_CHIPCTL_DATA, mask, set);
47 }
48 EXPORT_SYMBOL_GPL(bcma_chipco_chipctl_maskset);
49 
bcma_chipco_regctl_maskset(struct bcma_drv_cc * cc,u32 offset,u32 mask,u32 set)50 void bcma_chipco_regctl_maskset(struct bcma_drv_cc *cc, u32 offset, u32 mask,
51 				u32 set)
52 {
53 	bcma_pmu_write32(cc, BCMA_CC_PMU_REGCTL_ADDR, offset);
54 	bcma_pmu_read32(cc, BCMA_CC_PMU_REGCTL_ADDR);
55 	bcma_pmu_maskset32(cc, BCMA_CC_PMU_REGCTL_DATA, mask, set);
56 }
57 EXPORT_SYMBOL_GPL(bcma_chipco_regctl_maskset);
58 
bcma_pmu_xtalfreq(struct bcma_drv_cc * cc)59 static u32 bcma_pmu_xtalfreq(struct bcma_drv_cc *cc)
60 {
61 	u32 ilp_ctl, alp_hz;
62 
63 	if (!(bcma_pmu_read32(cc, BCMA_CC_PMU_STAT) &
64 	      BCMA_CC_PMU_STAT_EXT_LPO_AVAIL))
65 		return 0;
66 
67 	bcma_pmu_write32(cc, BCMA_CC_PMU_XTAL_FREQ,
68 			 BIT(BCMA_CC_PMU_XTAL_FREQ_MEASURE_SHIFT));
69 	usleep_range(1000, 2000);
70 
71 	ilp_ctl = bcma_pmu_read32(cc, BCMA_CC_PMU_XTAL_FREQ);
72 	ilp_ctl &= BCMA_CC_PMU_XTAL_FREQ_ILPCTL_MASK;
73 
74 	bcma_pmu_write32(cc, BCMA_CC_PMU_XTAL_FREQ, 0);
75 
76 	alp_hz = ilp_ctl * 32768 / 4;
77 	return (alp_hz + 50000) / 100000 * 100;
78 }
79 
bcma_pmu2_pll_init0(struct bcma_drv_cc * cc,u32 xtalfreq)80 static void bcma_pmu2_pll_init0(struct bcma_drv_cc *cc, u32 xtalfreq)
81 {
82 	struct bcma_bus *bus = cc->core->bus;
83 	u32 freq_tgt_target = 0, freq_tgt_current;
84 	u32 pll0, mask;
85 
86 	switch (bus->chipinfo.id) {
87 	case BCMA_CHIP_ID_BCM43142:
88 		/* pmu2_xtaltab0_adfll_485 */
89 		switch (xtalfreq) {
90 		case 12000:
91 			freq_tgt_target = 0x50D52;
92 			break;
93 		case 20000:
94 			freq_tgt_target = 0x307FE;
95 			break;
96 		case 26000:
97 			freq_tgt_target = 0x254EA;
98 			break;
99 		case 37400:
100 			freq_tgt_target = 0x19EF8;
101 			break;
102 		case 52000:
103 			freq_tgt_target = 0x12A75;
104 			break;
105 		}
106 		break;
107 	}
108 
109 	if (!freq_tgt_target) {
110 		bcma_err(bus, "Unknown TGT frequency for xtalfreq %d\n",
111 			 xtalfreq);
112 		return;
113 	}
114 
115 	pll0 = bcma_chipco_pll_read(cc, BCMA_CC_PMU15_PLL_PLLCTL0);
116 	freq_tgt_current = (pll0 & BCMA_CC_PMU15_PLL_PC0_FREQTGT_MASK) >>
117 		BCMA_CC_PMU15_PLL_PC0_FREQTGT_SHIFT;
118 
119 	if (freq_tgt_current == freq_tgt_target) {
120 		bcma_debug(bus, "Target TGT frequency already set\n");
121 		return;
122 	}
123 
124 	/* Turn off PLL */
125 	switch (bus->chipinfo.id) {
126 	case BCMA_CHIP_ID_BCM43142:
127 		mask = (u32)~(BCMA_RES_4314_HT_AVAIL |
128 			      BCMA_RES_4314_MACPHY_CLK_AVAIL);
129 
130 		bcma_pmu_mask32(cc, BCMA_CC_PMU_MINRES_MSK, mask);
131 		bcma_pmu_mask32(cc, BCMA_CC_PMU_MAXRES_MSK, mask);
132 		bcma_wait_value(cc->core, BCMA_CLKCTLST,
133 				BCMA_CLKCTLST_HAVEHT, 0, 20000);
134 		break;
135 	}
136 
137 	pll0 &= ~BCMA_CC_PMU15_PLL_PC0_FREQTGT_MASK;
138 	pll0 |= freq_tgt_target << BCMA_CC_PMU15_PLL_PC0_FREQTGT_SHIFT;
139 	bcma_chipco_pll_write(cc, BCMA_CC_PMU15_PLL_PLLCTL0, pll0);
140 
141 	/* Flush */
142 	if (cc->pmu.rev >= 2)
143 		bcma_pmu_set32(cc, BCMA_CC_PMU_CTL, BCMA_CC_PMU_CTL_PLL_UPD);
144 
145 	/* TODO: Do we need to update OTP? */
146 }
147 
bcma_pmu_pll_init(struct bcma_drv_cc * cc)148 static void bcma_pmu_pll_init(struct bcma_drv_cc *cc)
149 {
150 	struct bcma_bus *bus = cc->core->bus;
151 	u32 xtalfreq = bcma_pmu_xtalfreq(cc);
152 
153 	switch (bus->chipinfo.id) {
154 	case BCMA_CHIP_ID_BCM43142:
155 		if (xtalfreq == 0)
156 			xtalfreq = 20000;
157 		bcma_pmu2_pll_init0(cc, xtalfreq);
158 		break;
159 	}
160 }
161 
bcma_pmu_resources_init(struct bcma_drv_cc * cc)162 static void bcma_pmu_resources_init(struct bcma_drv_cc *cc)
163 {
164 	struct bcma_bus *bus = cc->core->bus;
165 	u32 min_msk = 0, max_msk = 0;
166 
167 	switch (bus->chipinfo.id) {
168 	case BCMA_CHIP_ID_BCM4313:
169 		min_msk = 0x200D;
170 		max_msk = 0xFFFF;
171 		break;
172 	case BCMA_CHIP_ID_BCM43142:
173 		min_msk = BCMA_RES_4314_LPLDO_PU |
174 			  BCMA_RES_4314_PMU_SLEEP_DIS |
175 			  BCMA_RES_4314_PMU_BG_PU |
176 			  BCMA_RES_4314_CBUCK_LPOM_PU |
177 			  BCMA_RES_4314_CBUCK_PFM_PU |
178 			  BCMA_RES_4314_CLDO_PU |
179 			  BCMA_RES_4314_LPLDO2_LVM |
180 			  BCMA_RES_4314_WL_PMU_PU |
181 			  BCMA_RES_4314_LDO3P3_PU |
182 			  BCMA_RES_4314_OTP_PU |
183 			  BCMA_RES_4314_WL_PWRSW_PU |
184 			  BCMA_RES_4314_LQ_AVAIL |
185 			  BCMA_RES_4314_LOGIC_RET |
186 			  BCMA_RES_4314_MEM_SLEEP |
187 			  BCMA_RES_4314_MACPHY_RET |
188 			  BCMA_RES_4314_WL_CORE_READY;
189 		max_msk = 0x3FFFFFFF;
190 		break;
191 	default:
192 		bcma_debug(bus, "PMU resource config unknown or not needed for device 0x%04X\n",
193 			   bus->chipinfo.id);
194 	}
195 
196 	/* Set the resource masks. */
197 	if (min_msk)
198 		bcma_pmu_write32(cc, BCMA_CC_PMU_MINRES_MSK, min_msk);
199 	if (max_msk)
200 		bcma_pmu_write32(cc, BCMA_CC_PMU_MAXRES_MSK, max_msk);
201 
202 	/*
203 	 * Add some delay; allow resources to come up and settle.
204 	 * Delay is required for SoC (early init).
205 	 */
206 	usleep_range(2000, 2500);
207 }
208 
209 /* Disable to allow reading SPROM. Don't know the adventages of enabling it. */
bcma_chipco_bcm4331_ext_pa_lines_ctl(struct bcma_drv_cc * cc,bool enable)210 void bcma_chipco_bcm4331_ext_pa_lines_ctl(struct bcma_drv_cc *cc, bool enable)
211 {
212 	struct bcma_bus *bus = cc->core->bus;
213 	u32 val;
214 
215 	val = bcma_cc_read32(cc, BCMA_CC_CHIPCTL);
216 	if (enable) {
217 		val |= BCMA_CHIPCTL_4331_EXTPA_EN;
218 		if (bus->chipinfo.pkg == 9 || bus->chipinfo.pkg == 11)
219 			val |= BCMA_CHIPCTL_4331_EXTPA_ON_GPIO2_5;
220 		else if (bus->chipinfo.rev > 0)
221 			val |= BCMA_CHIPCTL_4331_EXTPA_EN2;
222 	} else {
223 		val &= ~BCMA_CHIPCTL_4331_EXTPA_EN;
224 		val &= ~BCMA_CHIPCTL_4331_EXTPA_EN2;
225 		val &= ~BCMA_CHIPCTL_4331_EXTPA_ON_GPIO2_5;
226 	}
227 	bcma_cc_write32(cc, BCMA_CC_CHIPCTL, val);
228 }
229 
bcma_pmu_workarounds(struct bcma_drv_cc * cc)230 static void bcma_pmu_workarounds(struct bcma_drv_cc *cc)
231 {
232 	struct bcma_bus *bus = cc->core->bus;
233 
234 	switch (bus->chipinfo.id) {
235 	case BCMA_CHIP_ID_BCM4313:
236 		/*
237 		 * enable 12 mA drive strenth for 4313 and set chipControl
238 		 * register bit 1
239 		 */
240 		bcma_chipco_chipctl_maskset(cc, 0,
241 					    ~BCMA_CCTRL_4313_12MA_LED_DRIVE,
242 					    BCMA_CCTRL_4313_12MA_LED_DRIVE);
243 		break;
244 	case BCMA_CHIP_ID_BCM4331:
245 	case BCMA_CHIP_ID_BCM43431:
246 		/* Ext PA lines must be enabled for tx on BCM4331 */
247 		bcma_chipco_bcm4331_ext_pa_lines_ctl(cc, true);
248 		break;
249 	case BCMA_CHIP_ID_BCM43224:
250 	case BCMA_CHIP_ID_BCM43421:
251 		/*
252 		 * enable 12 mA drive strenth for 43224 and set chipControl
253 		 * register bit 15
254 		 */
255 		if (bus->chipinfo.rev == 0) {
256 			bcma_cc_maskset32(cc, BCMA_CC_CHIPCTL,
257 					  ~BCMA_CCTRL_43224_GPIO_TOGGLE,
258 					  BCMA_CCTRL_43224_GPIO_TOGGLE);
259 			bcma_chipco_chipctl_maskset(cc, 0,
260 						    ~BCMA_CCTRL_43224A0_12MA_LED_DRIVE,
261 						    BCMA_CCTRL_43224A0_12MA_LED_DRIVE);
262 		} else {
263 			bcma_chipco_chipctl_maskset(cc, 0,
264 						    ~BCMA_CCTRL_43224B0_12MA_LED_DRIVE,
265 						    BCMA_CCTRL_43224B0_12MA_LED_DRIVE);
266 		}
267 		break;
268 	default:
269 		bcma_debug(bus, "Workarounds unknown or not needed for device 0x%04X\n",
270 			   bus->chipinfo.id);
271 	}
272 }
273 
bcma_pmu_early_init(struct bcma_drv_cc * cc)274 void bcma_pmu_early_init(struct bcma_drv_cc *cc)
275 {
276 	struct bcma_bus *bus = cc->core->bus;
277 	u32 pmucap;
278 
279 	if (cc->core->id.rev >= 35 &&
280 	    cc->capabilities_ext & BCMA_CC_CAP_EXT_AOB_PRESENT) {
281 		cc->pmu.core = bcma_find_core(bus, BCMA_CORE_PMU);
282 		if (!cc->pmu.core)
283 			bcma_warn(bus, "Couldn't find expected PMU core");
284 	}
285 	if (!cc->pmu.core)
286 		cc->pmu.core = cc->core;
287 
288 	pmucap = bcma_pmu_read32(cc, BCMA_CC_PMU_CAP);
289 	cc->pmu.rev = (pmucap & BCMA_CC_PMU_CAP_REVISION);
290 
291 	bcma_debug(bus, "Found rev %u PMU (capabilities 0x%08X)\n", cc->pmu.rev,
292 		   pmucap);
293 }
294 
bcma_pmu_init(struct bcma_drv_cc * cc)295 void bcma_pmu_init(struct bcma_drv_cc *cc)
296 {
297 	if (cc->pmu.rev == 1)
298 		bcma_pmu_mask32(cc, BCMA_CC_PMU_CTL,
299 				~BCMA_CC_PMU_CTL_NOILPONW);
300 	else
301 		bcma_pmu_set32(cc, BCMA_CC_PMU_CTL,
302 			       BCMA_CC_PMU_CTL_NOILPONW);
303 
304 	bcma_pmu_pll_init(cc);
305 	bcma_pmu_resources_init(cc);
306 	bcma_pmu_workarounds(cc);
307 }
308 
bcma_pmu_get_alp_clock(struct bcma_drv_cc * cc)309 u32 bcma_pmu_get_alp_clock(struct bcma_drv_cc *cc)
310 {
311 	struct bcma_bus *bus = cc->core->bus;
312 
313 	switch (bus->chipinfo.id) {
314 	case BCMA_CHIP_ID_BCM4313:
315 	case BCMA_CHIP_ID_BCM43224:
316 	case BCMA_CHIP_ID_BCM43225:
317 	case BCMA_CHIP_ID_BCM43227:
318 	case BCMA_CHIP_ID_BCM43228:
319 	case BCMA_CHIP_ID_BCM4331:
320 	case BCMA_CHIP_ID_BCM43421:
321 	case BCMA_CHIP_ID_BCM43428:
322 	case BCMA_CHIP_ID_BCM43431:
323 	case BCMA_CHIP_ID_BCM4716:
324 	case BCMA_CHIP_ID_BCM47162:
325 	case BCMA_CHIP_ID_BCM4748:
326 	case BCMA_CHIP_ID_BCM4749:
327 	case BCMA_CHIP_ID_BCM5357:
328 	case BCMA_CHIP_ID_BCM53572:
329 	case BCMA_CHIP_ID_BCM6362:
330 		/* always 20Mhz */
331 		return 20000 * 1000;
332 	case BCMA_CHIP_ID_BCM4706:
333 	case BCMA_CHIP_ID_BCM5356:
334 		/* always 25Mhz */
335 		return 25000 * 1000;
336 	case BCMA_CHIP_ID_BCM43460:
337 	case BCMA_CHIP_ID_BCM4352:
338 	case BCMA_CHIP_ID_BCM4360:
339 		if (cc->status & BCMA_CC_CHIPST_4360_XTAL_40MZ)
340 			return 40000 * 1000;
341 		else
342 			return 20000 * 1000;
343 	default:
344 		bcma_warn(bus, "No ALP clock specified for %04X device, pmu rev. %d, using default %d Hz\n",
345 			  bus->chipinfo.id, cc->pmu.rev, BCMA_CC_PMU_ALP_CLOCK);
346 	}
347 	return BCMA_CC_PMU_ALP_CLOCK;
348 }
349 
350 /* Find the output of the "m" pll divider given pll controls that start with
351  * pllreg "pll0" i.e. 12 for main 6 for phy, 0 for misc.
352  */
bcma_pmu_pll_clock(struct bcma_drv_cc * cc,u32 pll0,u32 m)353 static u32 bcma_pmu_pll_clock(struct bcma_drv_cc *cc, u32 pll0, u32 m)
354 {
355 	u32 tmp, div, ndiv, p1, p2, fc;
356 	struct bcma_bus *bus = cc->core->bus;
357 
358 	BUG_ON((pll0 & 3) || (pll0 > BCMA_CC_PMU4716_MAINPLL_PLL0));
359 
360 	BUG_ON(!m || m > 4);
361 
362 	if (bus->chipinfo.id == BCMA_CHIP_ID_BCM5357 ||
363 	    bus->chipinfo.id == BCMA_CHIP_ID_BCM4749) {
364 		/* Detect failure in clock setting */
365 		tmp = bcma_cc_read32(cc, BCMA_CC_CHIPSTAT);
366 		if (tmp & 0x40000)
367 			return 133 * 1000000;
368 	}
369 
370 	tmp = bcma_chipco_pll_read(cc, pll0 + BCMA_CC_PPL_P1P2_OFF);
371 	p1 = (tmp & BCMA_CC_PPL_P1_MASK) >> BCMA_CC_PPL_P1_SHIFT;
372 	p2 = (tmp & BCMA_CC_PPL_P2_MASK) >> BCMA_CC_PPL_P2_SHIFT;
373 
374 	tmp = bcma_chipco_pll_read(cc, pll0 + BCMA_CC_PPL_M14_OFF);
375 	div = (tmp >> ((m - 1) * BCMA_CC_PPL_MDIV_WIDTH)) &
376 		BCMA_CC_PPL_MDIV_MASK;
377 
378 	tmp = bcma_chipco_pll_read(cc, pll0 + BCMA_CC_PPL_NM5_OFF);
379 	ndiv = (tmp & BCMA_CC_PPL_NDIV_MASK) >> BCMA_CC_PPL_NDIV_SHIFT;
380 
381 	/* Do calculation in Mhz */
382 	fc = bcma_pmu_get_alp_clock(cc) / 1000000;
383 	fc = (p1 * ndiv * fc) / p2;
384 
385 	/* Return clock in Hertz */
386 	return (fc / div) * 1000000;
387 }
388 
bcma_pmu_pll_clock_bcm4706(struct bcma_drv_cc * cc,u32 pll0,u32 m)389 static u32 bcma_pmu_pll_clock_bcm4706(struct bcma_drv_cc *cc, u32 pll0, u32 m)
390 {
391 	u32 tmp, ndiv, p1div, p2div;
392 	u32 clock;
393 
394 	BUG_ON(!m || m > 4);
395 
396 	/* Get N, P1 and P2 dividers to determine CPU clock */
397 	tmp = bcma_chipco_pll_read(cc, pll0 + BCMA_CC_PMU6_4706_PROCPLL_OFF);
398 	ndiv = (tmp & BCMA_CC_PMU6_4706_PROC_NDIV_INT_MASK)
399 		>> BCMA_CC_PMU6_4706_PROC_NDIV_INT_SHIFT;
400 	p1div = (tmp & BCMA_CC_PMU6_4706_PROC_P1DIV_MASK)
401 		>> BCMA_CC_PMU6_4706_PROC_P1DIV_SHIFT;
402 	p2div = (tmp & BCMA_CC_PMU6_4706_PROC_P2DIV_MASK)
403 		>> BCMA_CC_PMU6_4706_PROC_P2DIV_SHIFT;
404 
405 	tmp = bcma_cc_read32(cc, BCMA_CC_CHIPSTAT);
406 	if (tmp & BCMA_CC_CHIPST_4706_PKG_OPTION)
407 		/* Low cost bonding: Fixed reference clock 25MHz and m = 4 */
408 		clock = (25000000 / 4) * ndiv * p2div / p1div;
409 	else
410 		/* Fixed reference clock 25MHz and m = 2 */
411 		clock = (25000000 / 2) * ndiv * p2div / p1div;
412 
413 	if (m == BCMA_CC_PMU5_MAINPLL_SSB)
414 		clock = clock / 4;
415 
416 	return clock;
417 }
418 
419 /* query bus clock frequency for PMU-enabled chipcommon */
bcma_pmu_get_bus_clock(struct bcma_drv_cc * cc)420 u32 bcma_pmu_get_bus_clock(struct bcma_drv_cc *cc)
421 {
422 	struct bcma_bus *bus = cc->core->bus;
423 
424 	switch (bus->chipinfo.id) {
425 	case BCMA_CHIP_ID_BCM4716:
426 	case BCMA_CHIP_ID_BCM4748:
427 	case BCMA_CHIP_ID_BCM47162:
428 		return bcma_pmu_pll_clock(cc, BCMA_CC_PMU4716_MAINPLL_PLL0,
429 					  BCMA_CC_PMU5_MAINPLL_SSB);
430 	case BCMA_CHIP_ID_BCM5356:
431 		return bcma_pmu_pll_clock(cc, BCMA_CC_PMU5356_MAINPLL_PLL0,
432 					  BCMA_CC_PMU5_MAINPLL_SSB);
433 	case BCMA_CHIP_ID_BCM5357:
434 	case BCMA_CHIP_ID_BCM4749:
435 		return bcma_pmu_pll_clock(cc, BCMA_CC_PMU5357_MAINPLL_PLL0,
436 					  BCMA_CC_PMU5_MAINPLL_SSB);
437 	case BCMA_CHIP_ID_BCM4706:
438 		return bcma_pmu_pll_clock_bcm4706(cc,
439 						  BCMA_CC_PMU4706_MAINPLL_PLL0,
440 						  BCMA_CC_PMU5_MAINPLL_SSB);
441 	case BCMA_CHIP_ID_BCM53572:
442 		return 75000000;
443 	default:
444 		bcma_warn(bus, "No bus clock specified for %04X device, pmu rev. %d, using default %d Hz\n",
445 			  bus->chipinfo.id, cc->pmu.rev, BCMA_CC_PMU_HT_CLOCK);
446 	}
447 	return BCMA_CC_PMU_HT_CLOCK;
448 }
449 EXPORT_SYMBOL_GPL(bcma_pmu_get_bus_clock);
450 
451 /* query cpu clock frequency for PMU-enabled chipcommon */
bcma_pmu_get_cpu_clock(struct bcma_drv_cc * cc)452 u32 bcma_pmu_get_cpu_clock(struct bcma_drv_cc *cc)
453 {
454 	struct bcma_bus *bus = cc->core->bus;
455 
456 	if (bus->chipinfo.id == BCMA_CHIP_ID_BCM53572)
457 		return 300000000;
458 
459 	/* New PMUs can have different clock for bus and CPU */
460 	if (cc->pmu.rev >= 5) {
461 		u32 pll;
462 		switch (bus->chipinfo.id) {
463 		case BCMA_CHIP_ID_BCM4706:
464 			return bcma_pmu_pll_clock_bcm4706(cc,
465 						BCMA_CC_PMU4706_MAINPLL_PLL0,
466 						BCMA_CC_PMU5_MAINPLL_CPU);
467 		case BCMA_CHIP_ID_BCM5356:
468 			pll = BCMA_CC_PMU5356_MAINPLL_PLL0;
469 			break;
470 		case BCMA_CHIP_ID_BCM5357:
471 		case BCMA_CHIP_ID_BCM4749:
472 			pll = BCMA_CC_PMU5357_MAINPLL_PLL0;
473 			break;
474 		default:
475 			pll = BCMA_CC_PMU4716_MAINPLL_PLL0;
476 			break;
477 		}
478 
479 		return bcma_pmu_pll_clock(cc, pll, BCMA_CC_PMU5_MAINPLL_CPU);
480 	}
481 
482 	/* On old PMUs CPU has the same clock as the bus */
483 	return bcma_pmu_get_bus_clock(cc);
484 }
485 
bcma_pmu_spuravoid_pll_write(struct bcma_drv_cc * cc,u32 offset,u32 value)486 static void bcma_pmu_spuravoid_pll_write(struct bcma_drv_cc *cc, u32 offset,
487 					 u32 value)
488 {
489 	bcma_pmu_write32(cc, BCMA_CC_PMU_PLLCTL_ADDR, offset);
490 	bcma_pmu_write32(cc, BCMA_CC_PMU_PLLCTL_DATA, value);
491 }
492 
bcma_pmu_spuravoid_pllupdate(struct bcma_drv_cc * cc,int spuravoid)493 void bcma_pmu_spuravoid_pllupdate(struct bcma_drv_cc *cc, int spuravoid)
494 {
495 	u32 tmp = 0;
496 	u8 phypll_offset = 0;
497 	u8 bcm5357_bcm43236_p1div[] = {0x1, 0x5, 0x5};
498 	u8 bcm5357_bcm43236_ndiv[] = {0x30, 0xf6, 0xfc};
499 	struct bcma_bus *bus = cc->core->bus;
500 
501 	switch (bus->chipinfo.id) {
502 	case BCMA_CHIP_ID_BCM5357:
503 	case BCMA_CHIP_ID_BCM4749:
504 	case BCMA_CHIP_ID_BCM53572:
505 		/* 5357[ab]0, 43236[ab]0, and 6362b0 */
506 
507 		/*
508 		 * BCM5357 needs to touch PLL1_PLLCTL[02],
509 		 * so offset PLL0_PLLCTL[02] by 6
510 		 */
511 		phypll_offset = (bus->chipinfo.id == BCMA_CHIP_ID_BCM5357 ||
512 		       bus->chipinfo.id == BCMA_CHIP_ID_BCM4749 ||
513 		       bus->chipinfo.id == BCMA_CHIP_ID_BCM53572) ? 6 : 0;
514 
515 		/* RMW only the P1 divider */
516 		bcma_pmu_write32(cc, BCMA_CC_PMU_PLLCTL_ADDR,
517 				BCMA_CC_PMU_PLL_CTL0 + phypll_offset);
518 		tmp = bcma_pmu_read32(cc, BCMA_CC_PMU_PLLCTL_DATA);
519 		tmp &= (~(BCMA_CC_PMU1_PLL0_PC0_P1DIV_MASK));
520 		tmp |= (bcm5357_bcm43236_p1div[spuravoid] << BCMA_CC_PMU1_PLL0_PC0_P1DIV_SHIFT);
521 		bcma_pmu_write32(cc, BCMA_CC_PMU_PLLCTL_DATA, tmp);
522 
523 		/* RMW only the int feedback divider */
524 		bcma_pmu_write32(cc, BCMA_CC_PMU_PLLCTL_ADDR,
525 				BCMA_CC_PMU_PLL_CTL2 + phypll_offset);
526 		tmp = bcma_pmu_read32(cc, BCMA_CC_PMU_PLLCTL_DATA);
527 		tmp &= ~(BCMA_CC_PMU1_PLL0_PC2_NDIV_INT_MASK);
528 		tmp |= (bcm5357_bcm43236_ndiv[spuravoid]) << BCMA_CC_PMU1_PLL0_PC2_NDIV_INT_SHIFT;
529 		bcma_pmu_write32(cc, BCMA_CC_PMU_PLLCTL_DATA, tmp);
530 
531 		tmp = BCMA_CC_PMU_CTL_PLL_UPD;
532 		break;
533 
534 	case BCMA_CHIP_ID_BCM4331:
535 	case BCMA_CHIP_ID_BCM43431:
536 		if (spuravoid == 2) {
537 			bcma_pmu_spuravoid_pll_write(cc, BCMA_CC_PMU_PLL_CTL0,
538 						     0x11500014);
539 			bcma_pmu_spuravoid_pll_write(cc, BCMA_CC_PMU_PLL_CTL2,
540 						     0x0FC00a08);
541 		} else if (spuravoid == 1) {
542 			bcma_pmu_spuravoid_pll_write(cc, BCMA_CC_PMU_PLL_CTL0,
543 						     0x11500014);
544 			bcma_pmu_spuravoid_pll_write(cc, BCMA_CC_PMU_PLL_CTL2,
545 						     0x0F600a08);
546 		} else {
547 			bcma_pmu_spuravoid_pll_write(cc, BCMA_CC_PMU_PLL_CTL0,
548 						     0x11100014);
549 			bcma_pmu_spuravoid_pll_write(cc, BCMA_CC_PMU_PLL_CTL2,
550 						     0x03000a08);
551 		}
552 		tmp = BCMA_CC_PMU_CTL_PLL_UPD;
553 		break;
554 
555 	case BCMA_CHIP_ID_BCM43224:
556 	case BCMA_CHIP_ID_BCM43225:
557 	case BCMA_CHIP_ID_BCM43421:
558 		if (spuravoid == 1) {
559 			bcma_pmu_spuravoid_pll_write(cc, BCMA_CC_PMU_PLL_CTL0,
560 						     0x11500010);
561 			bcma_pmu_spuravoid_pll_write(cc, BCMA_CC_PMU_PLL_CTL1,
562 						     0x000C0C06);
563 			bcma_pmu_spuravoid_pll_write(cc, BCMA_CC_PMU_PLL_CTL2,
564 						     0x0F600a08);
565 			bcma_pmu_spuravoid_pll_write(cc, BCMA_CC_PMU_PLL_CTL3,
566 						     0x00000000);
567 			bcma_pmu_spuravoid_pll_write(cc, BCMA_CC_PMU_PLL_CTL4,
568 						     0x2001E920);
569 			bcma_pmu_spuravoid_pll_write(cc, BCMA_CC_PMU_PLL_CTL5,
570 						     0x88888815);
571 		} else {
572 			bcma_pmu_spuravoid_pll_write(cc, BCMA_CC_PMU_PLL_CTL0,
573 						     0x11100010);
574 			bcma_pmu_spuravoid_pll_write(cc, BCMA_CC_PMU_PLL_CTL1,
575 						     0x000c0c06);
576 			bcma_pmu_spuravoid_pll_write(cc, BCMA_CC_PMU_PLL_CTL2,
577 						     0x03000a08);
578 			bcma_pmu_spuravoid_pll_write(cc, BCMA_CC_PMU_PLL_CTL3,
579 						     0x00000000);
580 			bcma_pmu_spuravoid_pll_write(cc, BCMA_CC_PMU_PLL_CTL4,
581 						     0x200005c0);
582 			bcma_pmu_spuravoid_pll_write(cc, BCMA_CC_PMU_PLL_CTL5,
583 						     0x88888815);
584 		}
585 		tmp = BCMA_CC_PMU_CTL_PLL_UPD;
586 		break;
587 
588 	case BCMA_CHIP_ID_BCM4716:
589 	case BCMA_CHIP_ID_BCM4748:
590 	case BCMA_CHIP_ID_BCM47162:
591 		if (spuravoid == 1) {
592 			bcma_pmu_spuravoid_pll_write(cc, BCMA_CC_PMU_PLL_CTL0,
593 						     0x11500060);
594 			bcma_pmu_spuravoid_pll_write(cc, BCMA_CC_PMU_PLL_CTL1,
595 						     0x080C0C06);
596 			bcma_pmu_spuravoid_pll_write(cc, BCMA_CC_PMU_PLL_CTL2,
597 						     0x0F600000);
598 			bcma_pmu_spuravoid_pll_write(cc, BCMA_CC_PMU_PLL_CTL3,
599 						     0x00000000);
600 			bcma_pmu_spuravoid_pll_write(cc, BCMA_CC_PMU_PLL_CTL4,
601 						     0x2001E924);
602 			bcma_pmu_spuravoid_pll_write(cc, BCMA_CC_PMU_PLL_CTL5,
603 						     0x88888815);
604 		} else {
605 			bcma_pmu_spuravoid_pll_write(cc, BCMA_CC_PMU_PLL_CTL0,
606 						     0x11100060);
607 			bcma_pmu_spuravoid_pll_write(cc, BCMA_CC_PMU_PLL_CTL1,
608 						     0x080c0c06);
609 			bcma_pmu_spuravoid_pll_write(cc, BCMA_CC_PMU_PLL_CTL2,
610 						     0x03000000);
611 			bcma_pmu_spuravoid_pll_write(cc, BCMA_CC_PMU_PLL_CTL3,
612 						     0x00000000);
613 			bcma_pmu_spuravoid_pll_write(cc, BCMA_CC_PMU_PLL_CTL4,
614 						     0x200005c0);
615 			bcma_pmu_spuravoid_pll_write(cc, BCMA_CC_PMU_PLL_CTL5,
616 						     0x88888815);
617 		}
618 
619 		tmp = BCMA_CC_PMU_CTL_PLL_UPD | BCMA_CC_PMU_CTL_NOILPONW;
620 		break;
621 
622 	case BCMA_CHIP_ID_BCM43131:
623 	case BCMA_CHIP_ID_BCM43217:
624 	case BCMA_CHIP_ID_BCM43227:
625 	case BCMA_CHIP_ID_BCM43228:
626 	case BCMA_CHIP_ID_BCM43428:
627 		/* LCNXN */
628 		/*
629 		 * PLL Settings for spur avoidance on/off mode,
630 		 * no on2 support for 43228A0
631 		 */
632 		if (spuravoid == 1) {
633 			bcma_pmu_spuravoid_pll_write(cc, BCMA_CC_PMU_PLL_CTL0,
634 						     0x01100014);
635 			bcma_pmu_spuravoid_pll_write(cc, BCMA_CC_PMU_PLL_CTL1,
636 						     0x040C0C06);
637 			bcma_pmu_spuravoid_pll_write(cc, BCMA_CC_PMU_PLL_CTL2,
638 						     0x03140A08);
639 			bcma_pmu_spuravoid_pll_write(cc, BCMA_CC_PMU_PLL_CTL3,
640 						     0x00333333);
641 			bcma_pmu_spuravoid_pll_write(cc, BCMA_CC_PMU_PLL_CTL4,
642 						     0x202C2820);
643 			bcma_pmu_spuravoid_pll_write(cc, BCMA_CC_PMU_PLL_CTL5,
644 						     0x88888815);
645 		} else {
646 			bcma_pmu_spuravoid_pll_write(cc, BCMA_CC_PMU_PLL_CTL0,
647 						     0x11100014);
648 			bcma_pmu_spuravoid_pll_write(cc, BCMA_CC_PMU_PLL_CTL1,
649 						     0x040c0c06);
650 			bcma_pmu_spuravoid_pll_write(cc, BCMA_CC_PMU_PLL_CTL2,
651 						     0x03000a08);
652 			bcma_pmu_spuravoid_pll_write(cc, BCMA_CC_PMU_PLL_CTL3,
653 						     0x00000000);
654 			bcma_pmu_spuravoid_pll_write(cc, BCMA_CC_PMU_PLL_CTL4,
655 						     0x200005c0);
656 			bcma_pmu_spuravoid_pll_write(cc, BCMA_CC_PMU_PLL_CTL5,
657 						     0x88888815);
658 		}
659 		tmp = BCMA_CC_PMU_CTL_PLL_UPD;
660 		break;
661 	default:
662 		bcma_err(bus, "Unknown spuravoidance settings for chip 0x%04X, not changing PLL\n",
663 			 bus->chipinfo.id);
664 		break;
665 	}
666 
667 	tmp |= bcma_pmu_read32(cc, BCMA_CC_PMU_CTL);
668 	bcma_pmu_write32(cc, BCMA_CC_PMU_CTL, tmp);
669 }
670 EXPORT_SYMBOL_GPL(bcma_pmu_spuravoid_pllupdate);
671