1 /*
2  * Sonics Silicon Backplane
3  * Broadcom ChipCommon Power Management Unit driver
4  *
5  * Copyright 2009, Michael Buesch <m@bues.ch>
6  * Copyright 2007, Broadcom Corporation
7  *
8  * Licensed under the GNU/GPL. See COPYING for details.
9  */
10 
11 #include <linux/ssb/ssb.h>
12 #include <linux/ssb/ssb_regs.h>
13 #include <linux/ssb/ssb_driver_chipcommon.h>
14 #include <linux/delay.h>
15 #include <linux/export.h>
16 #ifdef CONFIG_BCM47XX
17 #include <asm/mach-bcm47xx/nvram.h>
18 #endif
19 
20 #include "ssb_private.h"
21 
ssb_chipco_pll_read(struct ssb_chipcommon * cc,u32 offset)22 static u32 ssb_chipco_pll_read(struct ssb_chipcommon *cc, u32 offset)
23 {
24 	chipco_write32(cc, SSB_CHIPCO_PLLCTL_ADDR, offset);
25 	return chipco_read32(cc, SSB_CHIPCO_PLLCTL_DATA);
26 }
27 
ssb_chipco_pll_write(struct ssb_chipcommon * cc,u32 offset,u32 value)28 static void ssb_chipco_pll_write(struct ssb_chipcommon *cc,
29 				 u32 offset, u32 value)
30 {
31 	chipco_write32(cc, SSB_CHIPCO_PLLCTL_ADDR, offset);
32 	chipco_write32(cc, SSB_CHIPCO_PLLCTL_DATA, value);
33 }
34 
ssb_chipco_regctl_maskset(struct ssb_chipcommon * cc,u32 offset,u32 mask,u32 set)35 static void ssb_chipco_regctl_maskset(struct ssb_chipcommon *cc,
36 				   u32 offset, u32 mask, u32 set)
37 {
38 	u32 value;
39 
40 	chipco_read32(cc, SSB_CHIPCO_REGCTL_ADDR);
41 	chipco_write32(cc, SSB_CHIPCO_REGCTL_ADDR, offset);
42 	chipco_read32(cc, SSB_CHIPCO_REGCTL_ADDR);
43 	value = chipco_read32(cc, SSB_CHIPCO_REGCTL_DATA);
44 	value &= mask;
45 	value |= set;
46 	chipco_write32(cc, SSB_CHIPCO_REGCTL_DATA, value);
47 	chipco_read32(cc, SSB_CHIPCO_REGCTL_DATA);
48 }
49 
50 struct pmu0_plltab_entry {
51 	u16 freq;	/* Crystal frequency in kHz.*/
52 	u8 xf;		/* Crystal frequency value for PMU control */
53 	u8 wb_int;
54 	u32 wb_frac;
55 };
56 
57 static const struct pmu0_plltab_entry pmu0_plltab[] = {
58 	{ .freq = 12000, .xf =  1, .wb_int = 73, .wb_frac = 349525, },
59 	{ .freq = 13000, .xf =  2, .wb_int = 67, .wb_frac = 725937, },
60 	{ .freq = 14400, .xf =  3, .wb_int = 61, .wb_frac = 116508, },
61 	{ .freq = 15360, .xf =  4, .wb_int = 57, .wb_frac = 305834, },
62 	{ .freq = 16200, .xf =  5, .wb_int = 54, .wb_frac = 336579, },
63 	{ .freq = 16800, .xf =  6, .wb_int = 52, .wb_frac = 399457, },
64 	{ .freq = 19200, .xf =  7, .wb_int = 45, .wb_frac = 873813, },
65 	{ .freq = 19800, .xf =  8, .wb_int = 44, .wb_frac = 466033, },
66 	{ .freq = 20000, .xf =  9, .wb_int = 44, .wb_frac = 0,      },
67 	{ .freq = 25000, .xf = 10, .wb_int = 70, .wb_frac = 419430, },
68 	{ .freq = 26000, .xf = 11, .wb_int = 67, .wb_frac = 725937, },
69 	{ .freq = 30000, .xf = 12, .wb_int = 58, .wb_frac = 699050, },
70 	{ .freq = 38400, .xf = 13, .wb_int = 45, .wb_frac = 873813, },
71 	{ .freq = 40000, .xf = 14, .wb_int = 45, .wb_frac = 0,      },
72 };
73 #define SSB_PMU0_DEFAULT_XTALFREQ	20000
74 
pmu0_plltab_find_entry(u32 crystalfreq)75 static const struct pmu0_plltab_entry * pmu0_plltab_find_entry(u32 crystalfreq)
76 {
77 	const struct pmu0_plltab_entry *e;
78 	unsigned int i;
79 
80 	for (i = 0; i < ARRAY_SIZE(pmu0_plltab); i++) {
81 		e = &pmu0_plltab[i];
82 		if (e->freq == crystalfreq)
83 			return e;
84 	}
85 
86 	return NULL;
87 }
88 
89 /* Tune the PLL to the crystal speed. crystalfreq is in kHz. */
ssb_pmu0_pllinit_r0(struct ssb_chipcommon * cc,u32 crystalfreq)90 static void ssb_pmu0_pllinit_r0(struct ssb_chipcommon *cc,
91 				u32 crystalfreq)
92 {
93 	struct ssb_bus *bus = cc->dev->bus;
94 	const struct pmu0_plltab_entry *e = NULL;
95 	u32 pmuctl, tmp, pllctl;
96 	unsigned int i;
97 
98 	if (crystalfreq)
99 		e = pmu0_plltab_find_entry(crystalfreq);
100 	if (!e)
101 		e = pmu0_plltab_find_entry(SSB_PMU0_DEFAULT_XTALFREQ);
102 	BUG_ON(!e);
103 	crystalfreq = e->freq;
104 	cc->pmu.crystalfreq = e->freq;
105 
106 	/* Check if the PLL already is programmed to this frequency. */
107 	pmuctl = chipco_read32(cc, SSB_CHIPCO_PMU_CTL);
108 	if (((pmuctl & SSB_CHIPCO_PMU_CTL_XTALFREQ) >> SSB_CHIPCO_PMU_CTL_XTALFREQ_SHIFT) == e->xf) {
109 		/* We're already there... */
110 		return;
111 	}
112 
113 	ssb_printk(KERN_INFO PFX "Programming PLL to %u.%03u MHz\n",
114 		   (crystalfreq / 1000), (crystalfreq % 1000));
115 
116 	/* First turn the PLL off. */
117 	switch (bus->chip_id) {
118 	case 0x4328:
119 		chipco_mask32(cc, SSB_CHIPCO_PMU_MINRES_MSK,
120 			      ~(1 << SSB_PMURES_4328_BB_PLL_PU));
121 		chipco_mask32(cc, SSB_CHIPCO_PMU_MAXRES_MSK,
122 			      ~(1 << SSB_PMURES_4328_BB_PLL_PU));
123 		break;
124 	case 0x5354:
125 		chipco_mask32(cc, SSB_CHIPCO_PMU_MINRES_MSK,
126 			      ~(1 << SSB_PMURES_5354_BB_PLL_PU));
127 		chipco_mask32(cc, SSB_CHIPCO_PMU_MAXRES_MSK,
128 			      ~(1 << SSB_PMURES_5354_BB_PLL_PU));
129 		break;
130 	default:
131 		SSB_WARN_ON(1);
132 	}
133 	for (i = 1500; i; i--) {
134 		tmp = chipco_read32(cc, SSB_CHIPCO_CLKCTLST);
135 		if (!(tmp & SSB_CHIPCO_CLKCTLST_HAVEHT))
136 			break;
137 		udelay(10);
138 	}
139 	tmp = chipco_read32(cc, SSB_CHIPCO_CLKCTLST);
140 	if (tmp & SSB_CHIPCO_CLKCTLST_HAVEHT)
141 		ssb_printk(KERN_EMERG PFX "Failed to turn the PLL off!\n");
142 
143 	/* Set PDIV in PLL control 0. */
144 	pllctl = ssb_chipco_pll_read(cc, SSB_PMU0_PLLCTL0);
145 	if (crystalfreq >= SSB_PMU0_PLLCTL0_PDIV_FREQ)
146 		pllctl |= SSB_PMU0_PLLCTL0_PDIV_MSK;
147 	else
148 		pllctl &= ~SSB_PMU0_PLLCTL0_PDIV_MSK;
149 	ssb_chipco_pll_write(cc, SSB_PMU0_PLLCTL0, pllctl);
150 
151 	/* Set WILD in PLL control 1. */
152 	pllctl = ssb_chipco_pll_read(cc, SSB_PMU0_PLLCTL1);
153 	pllctl &= ~SSB_PMU0_PLLCTL1_STOPMOD;
154 	pllctl &= ~(SSB_PMU0_PLLCTL1_WILD_IMSK | SSB_PMU0_PLLCTL1_WILD_FMSK);
155 	pllctl |= ((u32)e->wb_int << SSB_PMU0_PLLCTL1_WILD_IMSK_SHIFT) & SSB_PMU0_PLLCTL1_WILD_IMSK;
156 	pllctl |= ((u32)e->wb_frac << SSB_PMU0_PLLCTL1_WILD_FMSK_SHIFT) & SSB_PMU0_PLLCTL1_WILD_FMSK;
157 	if (e->wb_frac == 0)
158 		pllctl |= SSB_PMU0_PLLCTL1_STOPMOD;
159 	ssb_chipco_pll_write(cc, SSB_PMU0_PLLCTL1, pllctl);
160 
161 	/* Set WILD in PLL control 2. */
162 	pllctl = ssb_chipco_pll_read(cc, SSB_PMU0_PLLCTL2);
163 	pllctl &= ~SSB_PMU0_PLLCTL2_WILD_IMSKHI;
164 	pllctl |= (((u32)e->wb_int >> 4) << SSB_PMU0_PLLCTL2_WILD_IMSKHI_SHIFT) & SSB_PMU0_PLLCTL2_WILD_IMSKHI;
165 	ssb_chipco_pll_write(cc, SSB_PMU0_PLLCTL2, pllctl);
166 
167 	/* Set the crystalfrequency and the divisor. */
168 	pmuctl = chipco_read32(cc, SSB_CHIPCO_PMU_CTL);
169 	pmuctl &= ~SSB_CHIPCO_PMU_CTL_ILP_DIV;
170 	pmuctl |= (((crystalfreq + 127) / 128 - 1) << SSB_CHIPCO_PMU_CTL_ILP_DIV_SHIFT)
171 			& SSB_CHIPCO_PMU_CTL_ILP_DIV;
172 	pmuctl &= ~SSB_CHIPCO_PMU_CTL_XTALFREQ;
173 	pmuctl |= ((u32)e->xf << SSB_CHIPCO_PMU_CTL_XTALFREQ_SHIFT) & SSB_CHIPCO_PMU_CTL_XTALFREQ;
174 	chipco_write32(cc, SSB_CHIPCO_PMU_CTL, pmuctl);
175 }
176 
177 struct pmu1_plltab_entry {
178 	u16 freq;	/* Crystal frequency in kHz.*/
179 	u8 xf;		/* Crystal frequency value for PMU control */
180 	u8 ndiv_int;
181 	u32 ndiv_frac;
182 	u8 p1div;
183 	u8 p2div;
184 };
185 
186 static const struct pmu1_plltab_entry pmu1_plltab[] = {
187 	{ .freq = 12000, .xf =  1, .p1div = 3, .p2div = 22, .ndiv_int =  0x9, .ndiv_frac = 0xFFFFEF, },
188 	{ .freq = 13000, .xf =  2, .p1div = 1, .p2div =  6, .ndiv_int =  0xb, .ndiv_frac = 0x483483, },
189 	{ .freq = 14400, .xf =  3, .p1div = 1, .p2div = 10, .ndiv_int =  0xa, .ndiv_frac = 0x1C71C7, },
190 	{ .freq = 15360, .xf =  4, .p1div = 1, .p2div =  5, .ndiv_int =  0xb, .ndiv_frac = 0x755555, },
191 	{ .freq = 16200, .xf =  5, .p1div = 1, .p2div = 10, .ndiv_int =  0x5, .ndiv_frac = 0x6E9E06, },
192 	{ .freq = 16800, .xf =  6, .p1div = 1, .p2div = 10, .ndiv_int =  0x5, .ndiv_frac = 0x3CF3CF, },
193 	{ .freq = 19200, .xf =  7, .p1div = 1, .p2div =  9, .ndiv_int =  0x5, .ndiv_frac = 0x17B425, },
194 	{ .freq = 19800, .xf =  8, .p1div = 1, .p2div = 11, .ndiv_int =  0x4, .ndiv_frac = 0xA57EB,  },
195 	{ .freq = 20000, .xf =  9, .p1div = 1, .p2div = 11, .ndiv_int =  0x4, .ndiv_frac = 0,        },
196 	{ .freq = 24000, .xf = 10, .p1div = 3, .p2div = 11, .ndiv_int =  0xa, .ndiv_frac = 0,        },
197 	{ .freq = 25000, .xf = 11, .p1div = 5, .p2div = 16, .ndiv_int =  0xb, .ndiv_frac = 0,        },
198 	{ .freq = 26000, .xf = 12, .p1div = 1, .p2div =  2, .ndiv_int = 0x10, .ndiv_frac = 0xEC4EC4, },
199 	{ .freq = 30000, .xf = 13, .p1div = 3, .p2div =  8, .ndiv_int =  0xb, .ndiv_frac = 0,        },
200 	{ .freq = 38400, .xf = 14, .p1div = 1, .p2div =  5, .ndiv_int =  0x4, .ndiv_frac = 0x955555, },
201 	{ .freq = 40000, .xf = 15, .p1div = 1, .p2div =  2, .ndiv_int =  0xb, .ndiv_frac = 0,        },
202 };
203 
204 #define SSB_PMU1_DEFAULT_XTALFREQ	15360
205 
pmu1_plltab_find_entry(u32 crystalfreq)206 static const struct pmu1_plltab_entry * pmu1_plltab_find_entry(u32 crystalfreq)
207 {
208 	const struct pmu1_plltab_entry *e;
209 	unsigned int i;
210 
211 	for (i = 0; i < ARRAY_SIZE(pmu1_plltab); i++) {
212 		e = &pmu1_plltab[i];
213 		if (e->freq == crystalfreq)
214 			return e;
215 	}
216 
217 	return NULL;
218 }
219 
220 /* Tune the PLL to the crystal speed. crystalfreq is in kHz. */
ssb_pmu1_pllinit_r0(struct ssb_chipcommon * cc,u32 crystalfreq)221 static void ssb_pmu1_pllinit_r0(struct ssb_chipcommon *cc,
222 				u32 crystalfreq)
223 {
224 	struct ssb_bus *bus = cc->dev->bus;
225 	const struct pmu1_plltab_entry *e = NULL;
226 	u32 buffer_strength = 0;
227 	u32 tmp, pllctl, pmuctl;
228 	unsigned int i;
229 
230 	if (bus->chip_id == 0x4312) {
231 		/* We do not touch the BCM4312 PLL and assume
232 		 * the default crystal settings work out-of-the-box. */
233 		cc->pmu.crystalfreq = 20000;
234 		return;
235 	}
236 
237 	if (crystalfreq)
238 		e = pmu1_plltab_find_entry(crystalfreq);
239 	if (!e)
240 		e = pmu1_plltab_find_entry(SSB_PMU1_DEFAULT_XTALFREQ);
241 	BUG_ON(!e);
242 	crystalfreq = e->freq;
243 	cc->pmu.crystalfreq = e->freq;
244 
245 	/* Check if the PLL already is programmed to this frequency. */
246 	pmuctl = chipco_read32(cc, SSB_CHIPCO_PMU_CTL);
247 	if (((pmuctl & SSB_CHIPCO_PMU_CTL_XTALFREQ) >> SSB_CHIPCO_PMU_CTL_XTALFREQ_SHIFT) == e->xf) {
248 		/* We're already there... */
249 		return;
250 	}
251 
252 	ssb_printk(KERN_INFO PFX "Programming PLL to %u.%03u MHz\n",
253 		   (crystalfreq / 1000), (crystalfreq % 1000));
254 
255 	/* First turn the PLL off. */
256 	switch (bus->chip_id) {
257 	case 0x4325:
258 		chipco_mask32(cc, SSB_CHIPCO_PMU_MINRES_MSK,
259 			      ~((1 << SSB_PMURES_4325_BBPLL_PWRSW_PU) |
260 				(1 << SSB_PMURES_4325_HT_AVAIL)));
261 		chipco_mask32(cc, SSB_CHIPCO_PMU_MAXRES_MSK,
262 			      ~((1 << SSB_PMURES_4325_BBPLL_PWRSW_PU) |
263 				(1 << SSB_PMURES_4325_HT_AVAIL)));
264 		/* Adjust the BBPLL to 2 on all channels later. */
265 		buffer_strength = 0x222222;
266 		break;
267 	default:
268 		SSB_WARN_ON(1);
269 	}
270 	for (i = 1500; i; i--) {
271 		tmp = chipco_read32(cc, SSB_CHIPCO_CLKCTLST);
272 		if (!(tmp & SSB_CHIPCO_CLKCTLST_HAVEHT))
273 			break;
274 		udelay(10);
275 	}
276 	tmp = chipco_read32(cc, SSB_CHIPCO_CLKCTLST);
277 	if (tmp & SSB_CHIPCO_CLKCTLST_HAVEHT)
278 		ssb_printk(KERN_EMERG PFX "Failed to turn the PLL off!\n");
279 
280 	/* Set p1div and p2div. */
281 	pllctl = ssb_chipco_pll_read(cc, SSB_PMU1_PLLCTL0);
282 	pllctl &= ~(SSB_PMU1_PLLCTL0_P1DIV | SSB_PMU1_PLLCTL0_P2DIV);
283 	pllctl |= ((u32)e->p1div << SSB_PMU1_PLLCTL0_P1DIV_SHIFT) & SSB_PMU1_PLLCTL0_P1DIV;
284 	pllctl |= ((u32)e->p2div << SSB_PMU1_PLLCTL0_P2DIV_SHIFT) & SSB_PMU1_PLLCTL0_P2DIV;
285 	ssb_chipco_pll_write(cc, SSB_PMU1_PLLCTL0, pllctl);
286 
287 	/* Set ndiv int and ndiv mode */
288 	pllctl = ssb_chipco_pll_read(cc, SSB_PMU1_PLLCTL2);
289 	pllctl &= ~(SSB_PMU1_PLLCTL2_NDIVINT | SSB_PMU1_PLLCTL2_NDIVMODE);
290 	pllctl |= ((u32)e->ndiv_int << SSB_PMU1_PLLCTL2_NDIVINT_SHIFT) & SSB_PMU1_PLLCTL2_NDIVINT;
291 	pllctl |= (1 << SSB_PMU1_PLLCTL2_NDIVMODE_SHIFT) & SSB_PMU1_PLLCTL2_NDIVMODE;
292 	ssb_chipco_pll_write(cc, SSB_PMU1_PLLCTL2, pllctl);
293 
294 	/* Set ndiv frac */
295 	pllctl = ssb_chipco_pll_read(cc, SSB_PMU1_PLLCTL3);
296 	pllctl &= ~SSB_PMU1_PLLCTL3_NDIVFRAC;
297 	pllctl |= ((u32)e->ndiv_frac << SSB_PMU1_PLLCTL3_NDIVFRAC_SHIFT) & SSB_PMU1_PLLCTL3_NDIVFRAC;
298 	ssb_chipco_pll_write(cc, SSB_PMU1_PLLCTL3, pllctl);
299 
300 	/* Change the drive strength, if required. */
301 	if (buffer_strength) {
302 		pllctl = ssb_chipco_pll_read(cc, SSB_PMU1_PLLCTL5);
303 		pllctl &= ~SSB_PMU1_PLLCTL5_CLKDRV;
304 		pllctl |= (buffer_strength << SSB_PMU1_PLLCTL5_CLKDRV_SHIFT) & SSB_PMU1_PLLCTL5_CLKDRV;
305 		ssb_chipco_pll_write(cc, SSB_PMU1_PLLCTL5, pllctl);
306 	}
307 
308 	/* Tune the crystalfreq and the divisor. */
309 	pmuctl = chipco_read32(cc, SSB_CHIPCO_PMU_CTL);
310 	pmuctl &= ~(SSB_CHIPCO_PMU_CTL_ILP_DIV | SSB_CHIPCO_PMU_CTL_XTALFREQ);
311 	pmuctl |= ((((u32)e->freq + 127) / 128 - 1) << SSB_CHIPCO_PMU_CTL_ILP_DIV_SHIFT)
312 			& SSB_CHIPCO_PMU_CTL_ILP_DIV;
313 	pmuctl |= ((u32)e->xf << SSB_CHIPCO_PMU_CTL_XTALFREQ_SHIFT) & SSB_CHIPCO_PMU_CTL_XTALFREQ;
314 	chipco_write32(cc, SSB_CHIPCO_PMU_CTL, pmuctl);
315 }
316 
ssb_pmu_pll_init(struct ssb_chipcommon * cc)317 static void ssb_pmu_pll_init(struct ssb_chipcommon *cc)
318 {
319 	struct ssb_bus *bus = cc->dev->bus;
320 	u32 crystalfreq = 0; /* in kHz. 0 = keep default freq. */
321 
322 	if (bus->bustype == SSB_BUSTYPE_SSB) {
323 #ifdef CONFIG_BCM47XX
324 		char buf[20];
325 		if (nvram_getenv("xtalfreq", buf, sizeof(buf)) >= 0)
326 			crystalfreq = simple_strtoul(buf, NULL, 0);
327 #endif
328 	}
329 
330 	switch (bus->chip_id) {
331 	case 0x4312:
332 	case 0x4325:
333 		ssb_pmu1_pllinit_r0(cc, crystalfreq);
334 		break;
335 	case 0x4328:
336 		ssb_pmu0_pllinit_r0(cc, crystalfreq);
337 		break;
338 	case 0x5354:
339 		if (crystalfreq == 0)
340 			crystalfreq = 25000;
341 		ssb_pmu0_pllinit_r0(cc, crystalfreq);
342 		break;
343 	case 0x4322:
344 		if (cc->pmu.rev == 2) {
345 			chipco_write32(cc, SSB_CHIPCO_PLLCTL_ADDR, 0x0000000A);
346 			chipco_write32(cc, SSB_CHIPCO_PLLCTL_DATA, 0x380005C0);
347 		}
348 		break;
349 	default:
350 		ssb_printk(KERN_ERR PFX
351 			   "ERROR: PLL init unknown for device %04X\n",
352 			   bus->chip_id);
353 	}
354 }
355 
356 struct pmu_res_updown_tab_entry {
357 	u8 resource;	/* The resource number */
358 	u16 updown;	/* The updown value */
359 };
360 
361 enum pmu_res_depend_tab_task {
362 	PMU_RES_DEP_SET = 1,
363 	PMU_RES_DEP_ADD,
364 	PMU_RES_DEP_REMOVE,
365 };
366 
367 struct pmu_res_depend_tab_entry {
368 	u8 resource;	/* The resource number */
369 	u8 task;	/* SET | ADD | REMOVE */
370 	u32 depend;	/* The depend mask */
371 };
372 
373 static const struct pmu_res_updown_tab_entry pmu_res_updown_tab_4328a0[] = {
374 	{ .resource = SSB_PMURES_4328_EXT_SWITCHER_PWM,		.updown = 0x0101, },
375 	{ .resource = SSB_PMURES_4328_BB_SWITCHER_PWM,		.updown = 0x1F01, },
376 	{ .resource = SSB_PMURES_4328_BB_SWITCHER_BURST,	.updown = 0x010F, },
377 	{ .resource = SSB_PMURES_4328_BB_EXT_SWITCHER_BURST,	.updown = 0x0101, },
378 	{ .resource = SSB_PMURES_4328_ILP_REQUEST,		.updown = 0x0202, },
379 	{ .resource = SSB_PMURES_4328_RADIO_SWITCHER_PWM,	.updown = 0x0F01, },
380 	{ .resource = SSB_PMURES_4328_RADIO_SWITCHER_BURST,	.updown = 0x0F01, },
381 	{ .resource = SSB_PMURES_4328_ROM_SWITCH,		.updown = 0x0101, },
382 	{ .resource = SSB_PMURES_4328_PA_REF_LDO,		.updown = 0x0F01, },
383 	{ .resource = SSB_PMURES_4328_RADIO_LDO,		.updown = 0x0F01, },
384 	{ .resource = SSB_PMURES_4328_AFE_LDO,			.updown = 0x0F01, },
385 	{ .resource = SSB_PMURES_4328_PLL_LDO,			.updown = 0x0F01, },
386 	{ .resource = SSB_PMURES_4328_BG_FILTBYP,		.updown = 0x0101, },
387 	{ .resource = SSB_PMURES_4328_TX_FILTBYP,		.updown = 0x0101, },
388 	{ .resource = SSB_PMURES_4328_RX_FILTBYP,		.updown = 0x0101, },
389 	{ .resource = SSB_PMURES_4328_XTAL_PU,			.updown = 0x0101, },
390 	{ .resource = SSB_PMURES_4328_XTAL_EN,			.updown = 0xA001, },
391 	{ .resource = SSB_PMURES_4328_BB_PLL_FILTBYP,		.updown = 0x0101, },
392 	{ .resource = SSB_PMURES_4328_RF_PLL_FILTBYP,		.updown = 0x0101, },
393 	{ .resource = SSB_PMURES_4328_BB_PLL_PU,		.updown = 0x0701, },
394 };
395 
396 static const struct pmu_res_depend_tab_entry pmu_res_depend_tab_4328a0[] = {
397 	{
398 		/* Adjust ILP Request to avoid forcing EXT/BB into burst mode. */
399 		.resource = SSB_PMURES_4328_ILP_REQUEST,
400 		.task = PMU_RES_DEP_SET,
401 		.depend = ((1 << SSB_PMURES_4328_EXT_SWITCHER_PWM) |
402 			   (1 << SSB_PMURES_4328_BB_SWITCHER_PWM)),
403 	},
404 };
405 
406 static const struct pmu_res_updown_tab_entry pmu_res_updown_tab_4325a0[] = {
407 	{ .resource = SSB_PMURES_4325_XTAL_PU,			.updown = 0x1501, },
408 };
409 
410 static const struct pmu_res_depend_tab_entry pmu_res_depend_tab_4325a0[] = {
411 	{
412 		/* Adjust HT-Available dependencies. */
413 		.resource = SSB_PMURES_4325_HT_AVAIL,
414 		.task = PMU_RES_DEP_ADD,
415 		.depend = ((1 << SSB_PMURES_4325_RX_PWRSW_PU) |
416 			   (1 << SSB_PMURES_4325_TX_PWRSW_PU) |
417 			   (1 << SSB_PMURES_4325_LOGEN_PWRSW_PU) |
418 			   (1 << SSB_PMURES_4325_AFE_PWRSW_PU)),
419 	},
420 };
421 
ssb_pmu_resources_init(struct ssb_chipcommon * cc)422 static void ssb_pmu_resources_init(struct ssb_chipcommon *cc)
423 {
424 	struct ssb_bus *bus = cc->dev->bus;
425 	u32 min_msk = 0, max_msk = 0;
426 	unsigned int i;
427 	const struct pmu_res_updown_tab_entry *updown_tab = NULL;
428 	unsigned int updown_tab_size = 0;
429 	const struct pmu_res_depend_tab_entry *depend_tab = NULL;
430 	unsigned int depend_tab_size = 0;
431 
432 	switch (bus->chip_id) {
433 	case 0x4312:
434 		 min_msk = 0xCBB;
435 		 break;
436 	case 0x4322:
437 		/* We keep the default settings:
438 		 * min_msk = 0xCBB
439 		 * max_msk = 0x7FFFF
440 		 */
441 		break;
442 	case 0x4325:
443 		/* Power OTP down later. */
444 		min_msk = (1 << SSB_PMURES_4325_CBUCK_BURST) |
445 			  (1 << SSB_PMURES_4325_LNLDO2_PU);
446 		if (chipco_read32(cc, SSB_CHIPCO_CHIPSTAT) &
447 		    SSB_CHIPCO_CHST_4325_PMUTOP_2B)
448 			min_msk |= (1 << SSB_PMURES_4325_CLDO_CBUCK_BURST);
449 		/* The PLL may turn on, if it decides so. */
450 		max_msk = 0xFFFFF;
451 		updown_tab = pmu_res_updown_tab_4325a0;
452 		updown_tab_size = ARRAY_SIZE(pmu_res_updown_tab_4325a0);
453 		depend_tab = pmu_res_depend_tab_4325a0;
454 		depend_tab_size = ARRAY_SIZE(pmu_res_depend_tab_4325a0);
455 		break;
456 	case 0x4328:
457 		min_msk = (1 << SSB_PMURES_4328_EXT_SWITCHER_PWM) |
458 			  (1 << SSB_PMURES_4328_BB_SWITCHER_PWM) |
459 			  (1 << SSB_PMURES_4328_XTAL_EN);
460 		/* The PLL may turn on, if it decides so. */
461 		max_msk = 0xFFFFF;
462 		updown_tab = pmu_res_updown_tab_4328a0;
463 		updown_tab_size = ARRAY_SIZE(pmu_res_updown_tab_4328a0);
464 		depend_tab = pmu_res_depend_tab_4328a0;
465 		depend_tab_size = ARRAY_SIZE(pmu_res_depend_tab_4328a0);
466 		break;
467 	case 0x5354:
468 		/* The PLL may turn on, if it decides so. */
469 		max_msk = 0xFFFFF;
470 		break;
471 	default:
472 		ssb_printk(KERN_ERR PFX
473 			   "ERROR: PMU resource config unknown for device %04X\n",
474 			   bus->chip_id);
475 	}
476 
477 	if (updown_tab) {
478 		for (i = 0; i < updown_tab_size; i++) {
479 			chipco_write32(cc, SSB_CHIPCO_PMU_RES_TABSEL,
480 				       updown_tab[i].resource);
481 			chipco_write32(cc, SSB_CHIPCO_PMU_RES_UPDNTM,
482 				       updown_tab[i].updown);
483 		}
484 	}
485 	if (depend_tab) {
486 		for (i = 0; i < depend_tab_size; i++) {
487 			chipco_write32(cc, SSB_CHIPCO_PMU_RES_TABSEL,
488 				       depend_tab[i].resource);
489 			switch (depend_tab[i].task) {
490 			case PMU_RES_DEP_SET:
491 				chipco_write32(cc, SSB_CHIPCO_PMU_RES_DEPMSK,
492 					       depend_tab[i].depend);
493 				break;
494 			case PMU_RES_DEP_ADD:
495 				chipco_set32(cc, SSB_CHIPCO_PMU_RES_DEPMSK,
496 					     depend_tab[i].depend);
497 				break;
498 			case PMU_RES_DEP_REMOVE:
499 				chipco_mask32(cc, SSB_CHIPCO_PMU_RES_DEPMSK,
500 					      ~(depend_tab[i].depend));
501 				break;
502 			default:
503 				SSB_WARN_ON(1);
504 			}
505 		}
506 	}
507 
508 	/* Set the resource masks. */
509 	if (min_msk)
510 		chipco_write32(cc, SSB_CHIPCO_PMU_MINRES_MSK, min_msk);
511 	if (max_msk)
512 		chipco_write32(cc, SSB_CHIPCO_PMU_MAXRES_MSK, max_msk);
513 }
514 
515 /* http://bcm-v4.sipsolutions.net/802.11/SSB/PmuInit */
ssb_pmu_init(struct ssb_chipcommon * cc)516 void ssb_pmu_init(struct ssb_chipcommon *cc)
517 {
518 	u32 pmucap;
519 
520 	if (!(cc->capabilities & SSB_CHIPCO_CAP_PMU))
521 		return;
522 
523 	pmucap = chipco_read32(cc, SSB_CHIPCO_PMU_CAP);
524 	cc->pmu.rev = (pmucap & SSB_CHIPCO_PMU_CAP_REVISION);
525 
526 	ssb_dprintk(KERN_DEBUG PFX "Found rev %u PMU (capabilities 0x%08X)\n",
527 		    cc->pmu.rev, pmucap);
528 
529 	if (cc->pmu.rev == 1)
530 		chipco_mask32(cc, SSB_CHIPCO_PMU_CTL,
531 			      ~SSB_CHIPCO_PMU_CTL_NOILPONW);
532 	else
533 		chipco_set32(cc, SSB_CHIPCO_PMU_CTL,
534 			     SSB_CHIPCO_PMU_CTL_NOILPONW);
535 	ssb_pmu_pll_init(cc);
536 	ssb_pmu_resources_init(cc);
537 }
538 
ssb_pmu_set_ldo_voltage(struct ssb_chipcommon * cc,enum ssb_pmu_ldo_volt_id id,u32 voltage)539 void ssb_pmu_set_ldo_voltage(struct ssb_chipcommon *cc,
540 			     enum ssb_pmu_ldo_volt_id id, u32 voltage)
541 {
542 	struct ssb_bus *bus = cc->dev->bus;
543 	u32 addr, shift, mask;
544 
545 	switch (bus->chip_id) {
546 	case 0x4328:
547 	case 0x5354:
548 		switch (id) {
549 		case LDO_VOLT1:
550 			addr = 2;
551 			shift = 25;
552 			mask = 0xF;
553 			break;
554 		case LDO_VOLT2:
555 			addr = 3;
556 			shift = 1;
557 			mask = 0xF;
558 			break;
559 		case LDO_VOLT3:
560 			addr = 3;
561 			shift = 9;
562 			mask = 0xF;
563 			break;
564 		case LDO_PAREF:
565 			addr = 3;
566 			shift = 17;
567 			mask = 0x3F;
568 			break;
569 		default:
570 			SSB_WARN_ON(1);
571 			return;
572 		}
573 		break;
574 	case 0x4312:
575 		if (SSB_WARN_ON(id != LDO_PAREF))
576 			return;
577 		addr = 0;
578 		shift = 21;
579 		mask = 0x3F;
580 		break;
581 	default:
582 		return;
583 	}
584 
585 	ssb_chipco_regctl_maskset(cc, addr, ~(mask << shift),
586 				  (voltage & mask) << shift);
587 }
588 
ssb_pmu_set_ldo_paref(struct ssb_chipcommon * cc,bool on)589 void ssb_pmu_set_ldo_paref(struct ssb_chipcommon *cc, bool on)
590 {
591 	struct ssb_bus *bus = cc->dev->bus;
592 	int ldo;
593 
594 	switch (bus->chip_id) {
595 	case 0x4312:
596 		ldo = SSB_PMURES_4312_PA_REF_LDO;
597 		break;
598 	case 0x4328:
599 		ldo = SSB_PMURES_4328_PA_REF_LDO;
600 		break;
601 	case 0x5354:
602 		ldo = SSB_PMURES_5354_PA_REF_LDO;
603 		break;
604 	default:
605 		return;
606 	}
607 
608 	if (on)
609 		chipco_set32(cc, SSB_CHIPCO_PMU_MINRES_MSK, 1 << ldo);
610 	else
611 		chipco_mask32(cc, SSB_CHIPCO_PMU_MINRES_MSK, ~(1 << ldo));
612 	chipco_read32(cc, SSB_CHIPCO_PMU_MINRES_MSK); //SPEC FIXME found via mmiotrace - dummy read?
613 }
614 
615 EXPORT_SYMBOL(ssb_pmu_set_ldo_voltage);
616 EXPORT_SYMBOL(ssb_pmu_set_ldo_paref);
617 
ssb_pmu_get_cpu_clock(struct ssb_chipcommon * cc)618 u32 ssb_pmu_get_cpu_clock(struct ssb_chipcommon *cc)
619 {
620 	struct ssb_bus *bus = cc->dev->bus;
621 
622 	switch (bus->chip_id) {
623 	case 0x5354:
624 		/* 5354 chip uses a non programmable PLL of frequency 240MHz */
625 		return 240000000;
626 	default:
627 		ssb_printk(KERN_ERR PFX
628 			   "ERROR: PMU cpu clock unknown for device %04X\n",
629 			   bus->chip_id);
630 		return 0;
631 	}
632 }
633 
ssb_pmu_get_controlclock(struct ssb_chipcommon * cc)634 u32 ssb_pmu_get_controlclock(struct ssb_chipcommon *cc)
635 {
636 	struct ssb_bus *bus = cc->dev->bus;
637 
638 	switch (bus->chip_id) {
639 	case 0x5354:
640 		return 120000000;
641 	default:
642 		ssb_printk(KERN_ERR PFX
643 			   "ERROR: PMU controlclock unknown for device %04X\n",
644 			   bus->chip_id);
645 		return 0;
646 	}
647 }
648 
ssb_pmu_spuravoid_pllupdate(struct ssb_chipcommon * cc,int spuravoid)649 void ssb_pmu_spuravoid_pllupdate(struct ssb_chipcommon *cc, int spuravoid)
650 {
651 	u32 pmu_ctl = 0;
652 
653 	switch (cc->dev->bus->chip_id) {
654 	case 0x4322:
655 		ssb_chipco_pll_write(cc, SSB_PMU1_PLLCTL0, 0x11100070);
656 		ssb_chipco_pll_write(cc, SSB_PMU1_PLLCTL1, 0x1014140a);
657 		ssb_chipco_pll_write(cc, SSB_PMU1_PLLCTL5, 0x88888854);
658 		if (spuravoid == 1)
659 			ssb_chipco_pll_write(cc, SSB_PMU1_PLLCTL2, 0x05201828);
660 		else
661 			ssb_chipco_pll_write(cc, SSB_PMU1_PLLCTL2, 0x05001828);
662 		pmu_ctl = SSB_CHIPCO_PMU_CTL_PLL_UPD;
663 		break;
664 	case 43222:
665 		/* TODO: BCM43222 requires updating PLLs too */
666 		return;
667 	default:
668 		ssb_printk(KERN_ERR PFX
669 			   "Unknown spuravoidance settings for chip 0x%04X, not changing PLL\n",
670 			   cc->dev->bus->chip_id);
671 		return;
672 	}
673 
674 	chipco_set32(cc, SSB_CHIPCO_PMU_CTL, pmu_ctl);
675 }
676 EXPORT_SYMBOL_GPL(ssb_pmu_spuravoid_pllupdate);
677