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OMAP3: PM: Prevented DVFS state switches when enabling off-mode
[linux-ginger.git] / drivers / ssb / driver_chipcommon_pmu.c
blob64abd11f6fbbef64184011c9b4b7d0e0fb182ea8
1 /*
2 * Sonics Silicon Backplane
3 * Broadcom ChipCommon Power Management Unit driver
4 *
5 * Copyright 2009, Michael Buesch <mb@bu3sch.de>
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
16 #include "ssb_private.h"
17
18 static u32 ssb_chipco_pll_read(struct ssb_chipcommon *cc, u32 offset)
19 {
20 chipco_write32(cc, SSB_CHIPCO_PLLCTL_ADDR, offset);
21 return chipco_read32(cc, SSB_CHIPCO_PLLCTL_DATA);
22 }
23
24 static void ssb_chipco_pll_write(struct ssb_chipcommon *cc,
25 u32 offset, u32 value)
26 {
27 chipco_write32(cc, SSB_CHIPCO_PLLCTL_ADDR, offset);
28 chipco_write32(cc, SSB_CHIPCO_PLLCTL_DATA, value);
29 }
30
31 static void ssb_chipco_regctl_maskset(struct ssb_chipcommon *cc,
32 u32 offset, u32 mask, u32 set)
33 {
34 u32 value;
35
36 chipco_read32(cc, SSB_CHIPCO_REGCTL_ADDR);
37 chipco_write32(cc, SSB_CHIPCO_REGCTL_ADDR, offset);
38 chipco_read32(cc, SSB_CHIPCO_REGCTL_ADDR);
39 value = chipco_read32(cc, SSB_CHIPCO_REGCTL_DATA);
40 value &= mask;
41 value |= set;
42 chipco_write32(cc, SSB_CHIPCO_REGCTL_DATA, value);
43 chipco_read32(cc, SSB_CHIPCO_REGCTL_DATA);
44 }
45
46 struct pmu0_plltab_entry {
47 u16 freq; /* Crystal frequency in kHz.*/
48 u8 xf; /* Crystal frequency value for PMU control */
49 u8 wb_int;
50 u32 wb_frac;
51 };
52
53 static const struct pmu0_plltab_entry pmu0_plltab[] = {
54 { .freq = 12000, .xf = 1, .wb_int = 73, .wb_frac = 349525, },
55 { .freq = 13000, .xf = 2, .wb_int = 67, .wb_frac = 725937, },
56 { .freq = 14400, .xf = 3, .wb_int = 61, .wb_frac = 116508, },
57 { .freq = 15360, .xf = 4, .wb_int = 57, .wb_frac = 305834, },
58 { .freq = 16200, .xf = 5, .wb_int = 54, .wb_frac = 336579, },
59 { .freq = 16800, .xf = 6, .wb_int = 52, .wb_frac = 399457, },
60 { .freq = 19200, .xf = 7, .wb_int = 45, .wb_frac = 873813, },
61 { .freq = 19800, .xf = 8, .wb_int = 44, .wb_frac = 466033, },
62 { .freq = 20000, .xf = 9, .wb_int = 44, .wb_frac = 0, },
63 { .freq = 25000, .xf = 10, .wb_int = 70, .wb_frac = 419430, },
64 { .freq = 26000, .xf = 11, .wb_int = 67, .wb_frac = 725937, },
65 { .freq = 30000, .xf = 12, .wb_int = 58, .wb_frac = 699050, },
66 { .freq = 38400, .xf = 13, .wb_int = 45, .wb_frac = 873813, },
67 { .freq = 40000, .xf = 14, .wb_int = 45, .wb_frac = 0, },
68 };
69 #define SSB_PMU0_DEFAULT_XTALFREQ 20000
70
71 static const struct pmu0_plltab_entry * pmu0_plltab_find_entry(u32 crystalfreq)
72 {
73 const struct pmu0_plltab_entry *e;
74 unsigned int i;
75
76 for (i = 0; i < ARRAY_SIZE(pmu0_plltab); i++) {
77 e = &pmu0_plltab[i];
78 if (e->freq == crystalfreq)
79 return e;
80 }
81
82 return NULL;
83 }
84
85 /* Tune the PLL to the crystal speed. crystalfreq is in kHz. */
86 static void ssb_pmu0_pllinit_r0(struct ssb_chipcommon *cc,
87 u32 crystalfreq)
88 {
89 struct ssb_bus *bus = cc->dev->bus;
90 const struct pmu0_plltab_entry *e = NULL;
91 u32 pmuctl, tmp, pllctl;
92 unsigned int i;
93
94 if ((bus->chip_id == 0x5354) && !crystalfreq) {
95 /* The 5354 crystal freq is 25MHz */
96 crystalfreq = 25000;
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
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. */
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
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 /* TODO: The user may override the crystal frequency. */
324 }
325
326 switch (bus->chip_id) {
327 case 0x4312:
328 case 0x4325:
329 ssb_pmu1_pllinit_r0(cc, crystalfreq);
330 break;
331 case 0x4328:
332 case 0x5354:
333 ssb_pmu0_pllinit_r0(cc, crystalfreq);
334 break;
335 default:
336 ssb_printk(KERN_ERR PFX
337 "ERROR: PLL init unknown for device %04X\n",
338 bus->chip_id);
339 }
340 }
341
342 struct pmu_res_updown_tab_entry {
343 u8 resource; /* The resource number */
344 u16 updown; /* The updown value */
345 };
346
347 enum pmu_res_depend_tab_task {
348 PMU_RES_DEP_SET = 1,
349 PMU_RES_DEP_ADD,
350 PMU_RES_DEP_REMOVE,
351 };
352
353 struct pmu_res_depend_tab_entry {
354 u8 resource; /* The resource number */
355 u8 task; /* SET | ADD | REMOVE */
356 u32 depend; /* The depend mask */
357 };
358
359 static const struct pmu_res_updown_tab_entry pmu_res_updown_tab_4328a0[] = {
360 { .resource = SSB_PMURES_4328_EXT_SWITCHER_PWM, .updown = 0x0101, },
361 { .resource = SSB_PMURES_4328_BB_SWITCHER_PWM, .updown = 0x1F01, },
362 { .resource = SSB_PMURES_4328_BB_SWITCHER_BURST, .updown = 0x010F, },
363 { .resource = SSB_PMURES_4328_BB_EXT_SWITCHER_BURST, .updown = 0x0101, },
364 { .resource = SSB_PMURES_4328_ILP_REQUEST, .updown = 0x0202, },
365 { .resource = SSB_PMURES_4328_RADIO_SWITCHER_PWM, .updown = 0x0F01, },
366 { .resource = SSB_PMURES_4328_RADIO_SWITCHER_BURST, .updown = 0x0F01, },
367 { .resource = SSB_PMURES_4328_ROM_SWITCH, .updown = 0x0101, },
368 { .resource = SSB_PMURES_4328_PA_REF_LDO, .updown = 0x0F01, },
369 { .resource = SSB_PMURES_4328_RADIO_LDO, .updown = 0x0F01, },
370 { .resource = SSB_PMURES_4328_AFE_LDO, .updown = 0x0F01, },
371 { .resource = SSB_PMURES_4328_PLL_LDO, .updown = 0x0F01, },
372 { .resource = SSB_PMURES_4328_BG_FILTBYP, .updown = 0x0101, },
373 { .resource = SSB_PMURES_4328_TX_FILTBYP, .updown = 0x0101, },
374 { .resource = SSB_PMURES_4328_RX_FILTBYP, .updown = 0x0101, },
375 { .resource = SSB_PMURES_4328_XTAL_PU, .updown = 0x0101, },
376 { .resource = SSB_PMURES_4328_XTAL_EN, .updown = 0xA001, },
377 { .resource = SSB_PMURES_4328_BB_PLL_FILTBYP, .updown = 0x0101, },
378 { .resource = SSB_PMURES_4328_RF_PLL_FILTBYP, .updown = 0x0101, },
379 { .resource = SSB_PMURES_4328_BB_PLL_PU, .updown = 0x0701, },
380 };
381
382 static const struct pmu_res_depend_tab_entry pmu_res_depend_tab_4328a0[] = {
383 {
384 /* Adjust ILP Request to avoid forcing EXT/BB into burst mode. */
385 .resource = SSB_PMURES_4328_ILP_REQUEST,
386 .task = PMU_RES_DEP_SET,
387 .depend = ((1 << SSB_PMURES_4328_EXT_SWITCHER_PWM) |
388 (1 << SSB_PMURES_4328_BB_SWITCHER_PWM)),
389 },
390 };
391
392 static const struct pmu_res_updown_tab_entry pmu_res_updown_tab_4325a0[] = {
393 { .resource = SSB_PMURES_4325_XTAL_PU, .updown = 0x1501, },
394 };
395
396 static const struct pmu_res_depend_tab_entry pmu_res_depend_tab_4325a0[] = {
397 {
398 /* Adjust HT-Available dependencies. */
399 .resource = SSB_PMURES_4325_HT_AVAIL,
400 .task = PMU_RES_DEP_ADD,
401 .depend = ((1 << SSB_PMURES_4325_RX_PWRSW_PU) |
402 (1 << SSB_PMURES_4325_TX_PWRSW_PU) |
403 (1 << SSB_PMURES_4325_LOGEN_PWRSW_PU) |
404 (1 << SSB_PMURES_4325_AFE_PWRSW_PU)),
405 },
406 };
407
408 static void ssb_pmu_resources_init(struct ssb_chipcommon *cc)
409 {
410 struct ssb_bus *bus = cc->dev->bus;
411 u32 min_msk = 0, max_msk = 0;
412 unsigned int i;
413 const struct pmu_res_updown_tab_entry *updown_tab = NULL;
414 unsigned int updown_tab_size;
415 const struct pmu_res_depend_tab_entry *depend_tab = NULL;
416 unsigned int depend_tab_size;
417
418 switch (bus->chip_id) {
419 case 0x4312:
420 /* We keep the default settings:
421 * min_msk = 0xCBB
422 * max_msk = 0x7FFFF
423 */
424 break;
425 case 0x4325:
426 /* Power OTP down later. */
427 min_msk = (1 << SSB_PMURES_4325_CBUCK_BURST) |
428 (1 << SSB_PMURES_4325_LNLDO2_PU);
429 if (chipco_read32(cc, SSB_CHIPCO_CHIPSTAT) &
430 SSB_CHIPCO_CHST_4325_PMUTOP_2B)
431 min_msk |= (1 << SSB_PMURES_4325_CLDO_CBUCK_BURST);
432 /* The PLL may turn on, if it decides so. */
433 max_msk = 0xFFFFF;
434 updown_tab = pmu_res_updown_tab_4325a0;
435 updown_tab_size = ARRAY_SIZE(pmu_res_updown_tab_4325a0);
436 depend_tab = pmu_res_depend_tab_4325a0;
437 depend_tab_size = ARRAY_SIZE(pmu_res_depend_tab_4325a0);
438 break;
439 case 0x4328:
440 min_msk = (1 << SSB_PMURES_4328_EXT_SWITCHER_PWM) |
441 (1 << SSB_PMURES_4328_BB_SWITCHER_PWM) |
442 (1 << SSB_PMURES_4328_XTAL_EN);
443 /* The PLL may turn on, if it decides so. */
444 max_msk = 0xFFFFF;
445 updown_tab = pmu_res_updown_tab_4328a0;
446 updown_tab_size = ARRAY_SIZE(pmu_res_updown_tab_4328a0);
447 depend_tab = pmu_res_depend_tab_4328a0;
448 depend_tab_size = ARRAY_SIZE(pmu_res_depend_tab_4328a0);
449 break;
450 case 0x5354:
451 /* The PLL may turn on, if it decides so. */
452 max_msk = 0xFFFFF;
453 break;
454 default:
455 ssb_printk(KERN_ERR PFX
456 "ERROR: PMU resource config unknown for device %04X\n",
457 bus->chip_id);
458 }
459
460 if (updown_tab) {
461 for (i = 0; i < updown_tab_size; i++) {
462 chipco_write32(cc, SSB_CHIPCO_PMU_RES_TABSEL,
463 updown_tab[i].resource);
464 chipco_write32(cc, SSB_CHIPCO_PMU_RES_UPDNTM,
465 updown_tab[i].updown);
466 }
467 }
468 if (depend_tab) {
469 for (i = 0; i < depend_tab_size; i++) {
470 chipco_write32(cc, SSB_CHIPCO_PMU_RES_TABSEL,
471 depend_tab[i].resource);
472 switch (depend_tab[i].task) {
473 case PMU_RES_DEP_SET:
474 chipco_write32(cc, SSB_CHIPCO_PMU_RES_DEPMSK,
475 depend_tab[i].depend);
476 break;
477 case PMU_RES_DEP_ADD:
478 chipco_set32(cc, SSB_CHIPCO_PMU_RES_DEPMSK,
479 depend_tab[i].depend);
480 break;
481 case PMU_RES_DEP_REMOVE:
482 chipco_mask32(cc, SSB_CHIPCO_PMU_RES_DEPMSK,
483 ~(depend_tab[i].depend));
484 break;
485 default:
486 SSB_WARN_ON(1);
487 }
488 }
489 }
490
491 /* Set the resource masks. */
492 if (min_msk)
493 chipco_write32(cc, SSB_CHIPCO_PMU_MINRES_MSK, min_msk);
494 if (max_msk)
495 chipco_write32(cc, SSB_CHIPCO_PMU_MAXRES_MSK, max_msk);
496 }
497
498 void ssb_pmu_init(struct ssb_chipcommon *cc)
499 {
500 struct ssb_bus *bus = cc->dev->bus;
501 u32 pmucap;
502
503 if (!(cc->capabilities & SSB_CHIPCO_CAP_PMU))
504 return;
505
506 pmucap = chipco_read32(cc, SSB_CHIPCO_PMU_CAP);
507 cc->pmu.rev = (pmucap & SSB_CHIPCO_PMU_CAP_REVISION);
508
509 ssb_dprintk(KERN_DEBUG PFX "Found rev %u PMU (capabilities 0x%08X)\n",
510 cc->pmu.rev, pmucap);
511
512 if (cc->pmu.rev >= 1) {
513 if ((bus->chip_id == 0x4325) && (bus->chip_rev < 2)) {
514 chipco_mask32(cc, SSB_CHIPCO_PMU_CTL,
515 ~SSB_CHIPCO_PMU_CTL_NOILPONW);
516 } else {
517 chipco_set32(cc, SSB_CHIPCO_PMU_CTL,
518 SSB_CHIPCO_PMU_CTL_NOILPONW);
519 }
520 }
521 ssb_pmu_pll_init(cc);
522 ssb_pmu_resources_init(cc);
523 }
524
525 void ssb_pmu_set_ldo_voltage(struct ssb_chipcommon *cc,
526 enum ssb_pmu_ldo_volt_id id, u32 voltage)
527 {
528 struct ssb_bus *bus = cc->dev->bus;
529 u32 addr, shift, mask;
530
531 switch (bus->chip_id) {
532 case 0x4328:
533 case 0x5354:
534 switch (id) {
535 case LDO_VOLT1:
536 addr = 2;
537 shift = 25;
538 mask = 0xF;
539 break;
540 case LDO_VOLT2:
541 addr = 3;
542 shift = 1;
543 mask = 0xF;
544 break;
545 case LDO_VOLT3:
546 addr = 3;
547 shift = 9;
548 mask = 0xF;
549 break;
550 case LDO_PAREF:
551 addr = 3;
552 shift = 17;
553 mask = 0x3F;
554 break;
555 default:
556 SSB_WARN_ON(1);
557 return;
558 }
559 break;
560 case 0x4312:
561 if (SSB_WARN_ON(id != LDO_PAREF))
562 return;
563 addr = 0;
564 shift = 21;
565 mask = 0x3F;
566 break;
567 default:
568 return;
569 }
570
571 ssb_chipco_regctl_maskset(cc, addr, ~(mask << shift),
572 (voltage & mask) << shift);
573 }
574
575 void ssb_pmu_set_ldo_paref(struct ssb_chipcommon *cc, bool on)
576 {
577 struct ssb_bus *bus = cc->dev->bus;
578 int ldo;
579
580 switch (bus->chip_id) {
581 case 0x4312:
582 ldo = SSB_PMURES_4312_PA_REF_LDO;
583 break;
584 case 0x4328:
585 ldo = SSB_PMURES_4328_PA_REF_LDO;
586 break;
587 case 0x5354:
588 ldo = SSB_PMURES_5354_PA_REF_LDO;
589 break;
590 default:
591 return;
592 }
593
594 if (on)
595 chipco_set32(cc, SSB_CHIPCO_PMU_MINRES_MSK, 1 << ldo);
596 else
597 chipco_mask32(cc, SSB_CHIPCO_PMU_MINRES_MSK, ~(1 << ldo));
598 chipco_read32(cc, SSB_CHIPCO_PMU_MINRES_MSK); //SPEC FIXME found via mmiotrace - dummy read?
599 }
600
601 EXPORT_SYMBOL(ssb_pmu_set_ldo_voltage);
602 EXPORT_SYMBOL(ssb_pmu_set_ldo_paref);
Linux for Ginger Game Console