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authorMichael Buesch <mb@bu3sch.de>2009-02-03 13:23:18 -0500
committerJohn W. Linville <linville@tuxdriver.com>2009-02-09 15:03:49 -0500
commitc9703146158c0415a60799570397e488bc982af5 (patch)
tree3928988b53a4dc6dba56acbdb53ef6fadaeb4a07 /drivers/ssb/driver_chipcommon_pmu.c
parentbaf62eecfa75a26682efdfed0d74256992a47e6b (diff)
ssb: Add PMU support
This adds support for the SSB PMU. A PMU is found on Low-Power devices. Signed-off-by: Michael Buesch <mb@bu3sch.de> Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'drivers/ssb/driver_chipcommon_pmu.c')
-rw-r--r--drivers/ssb/driver_chipcommon_pmu.c508
1 files changed, 508 insertions, 0 deletions
diff --git a/drivers/ssb/driver_chipcommon_pmu.c b/drivers/ssb/driver_chipcommon_pmu.c
new file mode 100644
index 000000000000..4aaddeec55a2
--- /dev/null
+++ b/drivers/ssb/driver_chipcommon_pmu.c
@@ -0,0 +1,508 @@
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
18static 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
24static 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
31struct pmu0_plltab_entry {
32 u16 freq; /* Crystal frequency in kHz.*/
33 u8 xf; /* Crystal frequency value for PMU control */
34 u8 wb_int;
35 u32 wb_frac;
36};
37
38static const struct pmu0_plltab_entry pmu0_plltab[] = {
39 { .freq = 12000, .xf = 1, .wb_int = 73, .wb_frac = 349525, },
40 { .freq = 13000, .xf = 2, .wb_int = 67, .wb_frac = 725937, },
41 { .freq = 14400, .xf = 3, .wb_int = 61, .wb_frac = 116508, },
42 { .freq = 15360, .xf = 4, .wb_int = 57, .wb_frac = 305834, },
43 { .freq = 16200, .xf = 5, .wb_int = 54, .wb_frac = 336579, },
44 { .freq = 16800, .xf = 6, .wb_int = 52, .wb_frac = 399457, },
45 { .freq = 19200, .xf = 7, .wb_int = 45, .wb_frac = 873813, },
46 { .freq = 19800, .xf = 8, .wb_int = 44, .wb_frac = 466033, },
47 { .freq = 20000, .xf = 9, .wb_int = 44, .wb_frac = 0, },
48 { .freq = 25000, .xf = 10, .wb_int = 70, .wb_frac = 419430, },
49 { .freq = 26000, .xf = 11, .wb_int = 67, .wb_frac = 725937, },
50 { .freq = 30000, .xf = 12, .wb_int = 58, .wb_frac = 699050, },
51 { .freq = 38400, .xf = 13, .wb_int = 45, .wb_frac = 873813, },
52 { .freq = 40000, .xf = 14, .wb_int = 45, .wb_frac = 0, },
53};
54#define SSB_PMU0_DEFAULT_XTALFREQ 20000
55
56static const struct pmu0_plltab_entry * pmu0_plltab_find_entry(u32 crystalfreq)
57{
58 const struct pmu0_plltab_entry *e;
59 unsigned int i;
60
61 for (i = 0; i < ARRAY_SIZE(pmu0_plltab); i++) {
62 e = &pmu0_plltab[i];
63 if (e->freq == crystalfreq)
64 return e;
65 }
66
67 return NULL;
68}
69
70/* Tune the PLL to the crystal speed. crystalfreq is in kHz. */
71static void ssb_pmu0_pllinit_r0(struct ssb_chipcommon *cc,
72 u32 crystalfreq)
73{
74 struct ssb_bus *bus = cc->dev->bus;
75 const struct pmu0_plltab_entry *e = NULL;
76 u32 pmuctl, tmp, pllctl;
77 unsigned int i;
78
79 if ((bus->chip_id == 0x5354) && !crystalfreq) {
80 /* The 5354 crystal freq is 25MHz */
81 crystalfreq = 25000;
82 }
83 if (crystalfreq)
84 e = pmu0_plltab_find_entry(crystalfreq);
85 if (!e)
86 e = pmu0_plltab_find_entry(SSB_PMU0_DEFAULT_XTALFREQ);
87 BUG_ON(!e);
88 crystalfreq = e->freq;
89 cc->pmu.crystalfreq = e->freq;
90
91 /* Check if the PLL already is programmed to this frequency. */
92 pmuctl = chipco_read32(cc, SSB_CHIPCO_PMU_CTL);
93 if (((pmuctl & SSB_CHIPCO_PMU_CTL_XTALFREQ) >> SSB_CHIPCO_PMU_CTL_XTALFREQ_SHIFT) == e->xf) {
94 /* We're already there... */
95 return;
96 }
97
98 ssb_printk(KERN_INFO PFX "Programming PLL to %u.%03u MHz\n",
99 (crystalfreq / 1000), (crystalfreq % 1000));
100
101 /* First turn the PLL off. */
102 switch (bus->chip_id) {
103 case 0x4328:
104 chipco_mask32(cc, SSB_CHIPCO_PMU_MINRES_MSK,
105 ~(1 << SSB_PMURES_4328_BB_PLL_PU));
106 chipco_mask32(cc, SSB_CHIPCO_PMU_MAXRES_MSK,
107 ~(1 << SSB_PMURES_4328_BB_PLL_PU));
108 break;
109 case 0x5354:
110 chipco_mask32(cc, SSB_CHIPCO_PMU_MINRES_MSK,
111 ~(1 << SSB_PMURES_5354_BB_PLL_PU));
112 chipco_mask32(cc, SSB_CHIPCO_PMU_MAXRES_MSK,
113 ~(1 << SSB_PMURES_5354_BB_PLL_PU));
114 break;
115 default:
116 SSB_WARN_ON(1);
117 }
118 for (i = 1500; i; i--) {
119 tmp = chipco_read32(cc, SSB_CHIPCO_CLKCTLST);
120 if (!(tmp & SSB_CHIPCO_CLKCTLST_HAVEHT))
121 break;
122 udelay(10);
123 }
124 tmp = chipco_read32(cc, SSB_CHIPCO_CLKCTLST);
125 if (tmp & SSB_CHIPCO_CLKCTLST_HAVEHT)
126 ssb_printk(KERN_EMERG PFX "Failed to turn the PLL off!\n");
127
128 /* Set PDIV in PLL control 0. */
129 pllctl = ssb_chipco_pll_read(cc, SSB_PMU0_PLLCTL0);
130 if (crystalfreq >= SSB_PMU0_PLLCTL0_PDIV_FREQ)
131 pllctl |= SSB_PMU0_PLLCTL0_PDIV_MSK;
132 else
133 pllctl &= ~SSB_PMU0_PLLCTL0_PDIV_MSK;
134 ssb_chipco_pll_write(cc, SSB_PMU0_PLLCTL0, pllctl);
135
136 /* Set WILD in PLL control 1. */
137 pllctl = ssb_chipco_pll_read(cc, SSB_PMU0_PLLCTL1);
138 pllctl &= ~SSB_PMU0_PLLCTL1_STOPMOD;
139 pllctl &= ~(SSB_PMU0_PLLCTL1_WILD_IMSK | SSB_PMU0_PLLCTL1_WILD_FMSK);
140 pllctl |= ((u32)e->wb_int << SSB_PMU0_PLLCTL1_WILD_IMSK_SHIFT) & SSB_PMU0_PLLCTL1_WILD_IMSK;
141 pllctl |= ((u32)e->wb_frac << SSB_PMU0_PLLCTL1_WILD_FMSK_SHIFT) & SSB_PMU0_PLLCTL1_WILD_FMSK;
142 if (e->wb_frac == 0)
143 pllctl |= SSB_PMU0_PLLCTL1_STOPMOD;
144 ssb_chipco_pll_write(cc, SSB_PMU0_PLLCTL1, pllctl);
145
146 /* Set WILD in PLL control 2. */
147 pllctl = ssb_chipco_pll_read(cc, SSB_PMU0_PLLCTL2);
148 pllctl &= ~SSB_PMU0_PLLCTL2_WILD_IMSKHI;
149 pllctl |= (((u32)e->wb_int >> 4) << SSB_PMU0_PLLCTL2_WILD_IMSKHI_SHIFT) & SSB_PMU0_PLLCTL2_WILD_IMSKHI;
150 ssb_chipco_pll_write(cc, SSB_PMU0_PLLCTL2, pllctl);
151
152 /* Set the crystalfrequency and the divisor. */
153 pmuctl = chipco_read32(cc, SSB_CHIPCO_PMU_CTL);
154 pmuctl &= ~SSB_CHIPCO_PMU_CTL_ILP_DIV;
155 pmuctl |= (((crystalfreq + 127) / 128 - 1) << SSB_CHIPCO_PMU_CTL_ILP_DIV_SHIFT)
156 & SSB_CHIPCO_PMU_CTL_ILP_DIV;
157 pmuctl &= ~SSB_CHIPCO_PMU_CTL_XTALFREQ;
158 pmuctl |= ((u32)e->xf << SSB_CHIPCO_PMU_CTL_XTALFREQ_SHIFT) & SSB_CHIPCO_PMU_CTL_XTALFREQ;
159 chipco_write32(cc, SSB_CHIPCO_PMU_CTL, pmuctl);
160}
161
162struct pmu1_plltab_entry {
163 u16 freq; /* Crystal frequency in kHz.*/
164 u8 xf; /* Crystal frequency value for PMU control */
165 u8 ndiv_int;
166 u32 ndiv_frac;
167 u8 p1div;
168 u8 p2div;
169};
170
171static const struct pmu1_plltab_entry pmu1_plltab[] = {
172 { .freq = 12000, .xf = 1, .p1div = 3, .p2div = 22, .ndiv_int = 0x9, .ndiv_frac = 0xFFFFEF, },
173 { .freq = 13000, .xf = 2, .p1div = 1, .p2div = 6, .ndiv_int = 0xb, .ndiv_frac = 0x483483, },
174 { .freq = 14400, .xf = 3, .p1div = 1, .p2div = 10, .ndiv_int = 0xa, .ndiv_frac = 0x1C71C7, },
175 { .freq = 15360, .xf = 4, .p1div = 1, .p2div = 5, .ndiv_int = 0xb, .ndiv_frac = 0x755555, },
176 { .freq = 16200, .xf = 5, .p1div = 1, .p2div = 10, .ndiv_int = 0x5, .ndiv_frac = 0x6E9E06, },
177 { .freq = 16800, .xf = 6, .p1div = 1, .p2div = 10, .ndiv_int = 0x5, .ndiv_frac = 0x3CF3CF, },
178 { .freq = 19200, .xf = 7, .p1div = 1, .p2div = 9, .ndiv_int = 0x5, .ndiv_frac = 0x17B425, },
179 { .freq = 19800, .xf = 8, .p1div = 1, .p2div = 11, .ndiv_int = 0x4, .ndiv_frac = 0xA57EB, },
180 { .freq = 20000, .xf = 9, .p1div = 1, .p2div = 11, .ndiv_int = 0x4, .ndiv_frac = 0, },
181 { .freq = 24000, .xf = 10, .p1div = 3, .p2div = 11, .ndiv_int = 0xa, .ndiv_frac = 0, },
182 { .freq = 25000, .xf = 11, .p1div = 5, .p2div = 16, .ndiv_int = 0xb, .ndiv_frac = 0, },
183 { .freq = 26000, .xf = 12, .p1div = 1, .p2div = 2, .ndiv_int = 0x10, .ndiv_frac = 0xEC4EC4, },
184 { .freq = 30000, .xf = 13, .p1div = 3, .p2div = 8, .ndiv_int = 0xb, .ndiv_frac = 0, },
185 { .freq = 38400, .xf = 14, .p1div = 1, .p2div = 5, .ndiv_int = 0x4, .ndiv_frac = 0x955555, },
186 { .freq = 40000, .xf = 15, .p1div = 1, .p2div = 2, .ndiv_int = 0xb, .ndiv_frac = 0, },
187};
188
189#define SSB_PMU1_DEFAULT_XTALFREQ 15360
190
191static const struct pmu1_plltab_entry * pmu1_plltab_find_entry(u32 crystalfreq)
192{
193 const struct pmu1_plltab_entry *e;
194 unsigned int i;
195
196 for (i = 0; i < ARRAY_SIZE(pmu1_plltab); i++) {
197 e = &pmu1_plltab[i];
198 if (e->freq == crystalfreq)
199 return e;
200 }
201
202 return NULL;
203}
204
205/* Tune the PLL to the crystal speed. crystalfreq is in kHz. */
206static void ssb_pmu1_pllinit_r0(struct ssb_chipcommon *cc,
207 u32 crystalfreq)
208{
209 struct ssb_bus *bus = cc->dev->bus;
210 const struct pmu1_plltab_entry *e = NULL;
211 u32 buffer_strength = 0;
212 u32 tmp, pllctl, pmuctl;
213 unsigned int i;
214
215 if (bus->chip_id == 0x4312) {
216 /* We do not touch the BCM4312 PLL and assume
217 * the default crystal settings work out-of-the-box. */
218 cc->pmu.crystalfreq = 20000;
219 return;
220 }
221
222 if (crystalfreq)
223 e = pmu1_plltab_find_entry(crystalfreq);
224 if (!e)
225 e = pmu1_plltab_find_entry(SSB_PMU1_DEFAULT_XTALFREQ);
226 BUG_ON(!e);
227 crystalfreq = e->freq;
228 cc->pmu.crystalfreq = e->freq;
229
230 /* Check if the PLL already is programmed to this frequency. */
231 pmuctl = chipco_read32(cc, SSB_CHIPCO_PMU_CTL);
232 if (((pmuctl & SSB_CHIPCO_PMU_CTL_XTALFREQ) >> SSB_CHIPCO_PMU_CTL_XTALFREQ_SHIFT) == e->xf) {
233 /* We're already there... */
234 return;
235 }
236
237 ssb_printk(KERN_INFO PFX "Programming PLL to %u.%03u MHz\n",
238 (crystalfreq / 1000), (crystalfreq % 1000));
239
240 /* First turn the PLL off. */
241 switch (bus->chip_id) {
242 case 0x4325:
243 chipco_mask32(cc, SSB_CHIPCO_PMU_MINRES_MSK,
244 ~((1 << SSB_PMURES_4325_BBPLL_PWRSW_PU) |
245 (1 << SSB_PMURES_4325_HT_AVAIL)));
246 chipco_mask32(cc, SSB_CHIPCO_PMU_MAXRES_MSK,
247 ~((1 << SSB_PMURES_4325_BBPLL_PWRSW_PU) |
248 (1 << SSB_PMURES_4325_HT_AVAIL)));
249 /* Adjust the BBPLL to 2 on all channels later. */
250 buffer_strength = 0x222222;
251 break;
252 default:
253 SSB_WARN_ON(1);
254 }
255 for (i = 1500; i; i--) {
256 tmp = chipco_read32(cc, SSB_CHIPCO_CLKCTLST);
257 if (!(tmp & SSB_CHIPCO_CLKCTLST_HAVEHT))
258 break;
259 udelay(10);
260 }
261 tmp = chipco_read32(cc, SSB_CHIPCO_CLKCTLST);
262 if (tmp & SSB_CHIPCO_CLKCTLST_HAVEHT)
263 ssb_printk(KERN_EMERG PFX "Failed to turn the PLL off!\n");
264
265 /* Set p1div and p2div. */
266 pllctl = ssb_chipco_pll_read(cc, SSB_PMU1_PLLCTL0);
267 pllctl &= ~(SSB_PMU1_PLLCTL0_P1DIV | SSB_PMU1_PLLCTL0_P2DIV);
268 pllctl |= ((u32)e->p1div << SSB_PMU1_PLLCTL0_P1DIV_SHIFT) & SSB_PMU1_PLLCTL0_P1DIV;
269 pllctl |= ((u32)e->p2div << SSB_PMU1_PLLCTL0_P2DIV_SHIFT) & SSB_PMU1_PLLCTL0_P2DIV;
270 ssb_chipco_pll_write(cc, SSB_PMU1_PLLCTL0, pllctl);
271
272 /* Set ndiv int and ndiv mode */
273 pllctl = ssb_chipco_pll_read(cc, SSB_PMU1_PLLCTL2);
274 pllctl &= ~(SSB_PMU1_PLLCTL2_NDIVINT | SSB_PMU1_PLLCTL2_NDIVMODE);
275 pllctl |= ((u32)e->ndiv_int << SSB_PMU1_PLLCTL2_NDIVINT_SHIFT) & SSB_PMU1_PLLCTL2_NDIVINT;
276 pllctl |= (1 << SSB_PMU1_PLLCTL2_NDIVMODE_SHIFT) & SSB_PMU1_PLLCTL2_NDIVMODE;
277 ssb_chipco_pll_write(cc, SSB_PMU1_PLLCTL2, pllctl);
278
279 /* Set ndiv frac */
280 pllctl = ssb_chipco_pll_read(cc, SSB_PMU1_PLLCTL3);
281 pllctl &= ~SSB_PMU1_PLLCTL3_NDIVFRAC;
282 pllctl |= ((u32)e->ndiv_frac << SSB_PMU1_PLLCTL3_NDIVFRAC_SHIFT) & SSB_PMU1_PLLCTL3_NDIVFRAC;
283 ssb_chipco_pll_write(cc, SSB_PMU1_PLLCTL3, pllctl);
284
285 /* Change the drive strength, if required. */
286 if (buffer_strength) {
287 pllctl = ssb_chipco_pll_read(cc, SSB_PMU1_PLLCTL5);
288 pllctl &= ~SSB_PMU1_PLLCTL5_CLKDRV;
289 pllctl |= (buffer_strength << SSB_PMU1_PLLCTL5_CLKDRV_SHIFT) & SSB_PMU1_PLLCTL5_CLKDRV;
290 ssb_chipco_pll_write(cc, SSB_PMU1_PLLCTL5, pllctl);
291 }
292
293 /* Tune the crystalfreq and the divisor. */
294 pmuctl = chipco_read32(cc, SSB_CHIPCO_PMU_CTL);
295 pmuctl &= ~(SSB_CHIPCO_PMU_CTL_ILP_DIV | SSB_CHIPCO_PMU_CTL_XTALFREQ);
296 pmuctl |= ((((u32)e->freq + 127) / 128 - 1) << SSB_CHIPCO_PMU_CTL_ILP_DIV_SHIFT)
297 & SSB_CHIPCO_PMU_CTL_ILP_DIV;
298 pmuctl |= ((u32)e->xf << SSB_CHIPCO_PMU_CTL_XTALFREQ_SHIFT) & SSB_CHIPCO_PMU_CTL_XTALFREQ;
299 chipco_write32(cc, SSB_CHIPCO_PMU_CTL, pmuctl);
300}
301
302static void ssb_pmu_pll_init(struct ssb_chipcommon *cc)
303{
304 struct ssb_bus *bus = cc->dev->bus;
305 u32 crystalfreq = 0; /* in kHz. 0 = keep default freq. */
306
307 if (bus->bustype == SSB_BUSTYPE_SSB) {
308 /* TODO: The user may override the crystal frequency. */
309 }
310
311 switch (bus->chip_id) {
312 case 0x4312:
313 case 0x4325:
314 ssb_pmu1_pllinit_r0(cc, crystalfreq);
315 break;
316 case 0x4328:
317 case 0x5354:
318 ssb_pmu0_pllinit_r0(cc, crystalfreq);
319 break;
320 default:
321 ssb_printk(KERN_ERR PFX
322 "ERROR: PLL init unknown for device %04X\n",
323 bus->chip_id);
324 }
325}
326
327struct pmu_res_updown_tab_entry {
328 u8 resource; /* The resource number */
329 u16 updown; /* The updown value */
330};
331
332enum pmu_res_depend_tab_task {
333 PMU_RES_DEP_SET = 1,
334 PMU_RES_DEP_ADD,
335 PMU_RES_DEP_REMOVE,
336};
337
338struct pmu_res_depend_tab_entry {
339 u8 resource; /* The resource number */
340 u8 task; /* SET | ADD | REMOVE */
341 u32 depend; /* The depend mask */
342};
343
344static const struct pmu_res_updown_tab_entry pmu_res_updown_tab_4328a0[] = {
345 { .resource = SSB_PMURES_4328_EXT_SWITCHER_PWM, .updown = 0x0101, },
346 { .resource = SSB_PMURES_4328_BB_SWITCHER_PWM, .updown = 0x1F01, },
347 { .resource = SSB_PMURES_4328_BB_SWITCHER_BURST, .updown = 0x010F, },
348 { .resource = SSB_PMURES_4328_BB_EXT_SWITCHER_BURST, .updown = 0x0101, },
349 { .resource = SSB_PMURES_4328_ILP_REQUEST, .updown = 0x0202, },
350 { .resource = SSB_PMURES_4328_RADIO_SWITCHER_PWM, .updown = 0x0F01, },
351 { .resource = SSB_PMURES_4328_RADIO_SWITCHER_BURST, .updown = 0x0F01, },
352 { .resource = SSB_PMURES_4328_ROM_SWITCH, .updown = 0x0101, },
353 { .resource = SSB_PMURES_4328_PA_REF_LDO, .updown = 0x0F01, },
354 { .resource = SSB_PMURES_4328_RADIO_LDO, .updown = 0x0F01, },
355 { .resource = SSB_PMURES_4328_AFE_LDO, .updown = 0x0F01, },
356 { .resource = SSB_PMURES_4328_PLL_LDO, .updown = 0x0F01, },
357 { .resource = SSB_PMURES_4328_BG_FILTBYP, .updown = 0x0101, },
358 { .resource = SSB_PMURES_4328_TX_FILTBYP, .updown = 0x0101, },
359 { .resource = SSB_PMURES_4328_RX_FILTBYP, .updown = 0x0101, },
360 { .resource = SSB_PMURES_4328_XTAL_PU, .updown = 0x0101, },
361 { .resource = SSB_PMURES_4328_XTAL_EN, .updown = 0xA001, },
362 { .resource = SSB_PMURES_4328_BB_PLL_FILTBYP, .updown = 0x0101, },
363 { .resource = SSB_PMURES_4328_RF_PLL_FILTBYP, .updown = 0x0101, },
364 { .resource = SSB_PMURES_4328_BB_PLL_PU, .updown = 0x0701, },
365};
366
367static const struct pmu_res_depend_tab_entry pmu_res_depend_tab_4328a0[] = {
368 {
369 /* Adjust ILP Request to avoid forcing EXT/BB into burst mode. */
370 .resource = SSB_PMURES_4328_ILP_REQUEST,
371 .task = PMU_RES_DEP_SET,
372 .depend = ((1 << SSB_PMURES_4328_EXT_SWITCHER_PWM) |
373 (1 << SSB_PMURES_4328_BB_SWITCHER_PWM)),
374 },
375};
376
377static const struct pmu_res_updown_tab_entry pmu_res_updown_tab_4325a0[] = {
378 { .resource = SSB_PMURES_4325_XTAL_PU, .updown = 0x1501, },
379};
380
381static const struct pmu_res_depend_tab_entry pmu_res_depend_tab_4325a0[] = {
382 {
383 /* Adjust HT-Available dependencies. */
384 .resource = SSB_PMURES_4325_HT_AVAIL,
385 .task = PMU_RES_DEP_ADD,
386 .depend = ((1 << SSB_PMURES_4325_RX_PWRSW_PU) |
387 (1 << SSB_PMURES_4325_TX_PWRSW_PU) |
388 (1 << SSB_PMURES_4325_LOGEN_PWRSW_PU) |
389 (1 << SSB_PMURES_4325_AFE_PWRSW_PU)),
390 },
391};
392
393static void ssb_pmu_resources_init(struct ssb_chipcommon *cc)
394{
395 struct ssb_bus *bus = cc->dev->bus;
396 u32 min_msk = 0, max_msk = 0;
397 unsigned int i;
398 const struct pmu_res_updown_tab_entry *updown_tab = NULL;
399 unsigned int updown_tab_size;
400 const struct pmu_res_depend_tab_entry *depend_tab = NULL;
401 unsigned int depend_tab_size;
402
403 switch (bus->chip_id) {
404 case 0x4312:
405 /* We keep the default settings:
406 * min_msk = 0xCBB
407 * max_msk = 0x7FFFF
408 */
409 break;
410 case 0x4325:
411 /* Power OTP down later. */
412 min_msk = (1 << SSB_PMURES_4325_CBUCK_BURST) |
413 (1 << SSB_PMURES_4325_LNLDO2_PU);
414 if (chipco_read32(cc, SSB_CHIPCO_CHIPSTAT) &
415 SSB_CHIPCO_CHST_4325_PMUTOP_2B)
416 min_msk |= (1 << SSB_PMURES_4325_CLDO_CBUCK_BURST);
417 /* The PLL may turn on, if it decides so. */
418 max_msk = 0xFFFFF;
419 updown_tab = pmu_res_updown_tab_4325a0;
420 updown_tab_size = ARRAY_SIZE(pmu_res_updown_tab_4325a0);
421 depend_tab = pmu_res_depend_tab_4325a0;
422 depend_tab_size = ARRAY_SIZE(pmu_res_depend_tab_4325a0);
423 break;
424 case 0x4328:
425 min_msk = (1 << SSB_PMURES_4328_EXT_SWITCHER_PWM) |
426 (1 << SSB_PMURES_4328_BB_SWITCHER_PWM) |
427 (1 << SSB_PMURES_4328_XTAL_EN);
428 /* The PLL may turn on, if it decides so. */
429 max_msk = 0xFFFFF;
430 updown_tab = pmu_res_updown_tab_4328a0;
431 updown_tab_size = ARRAY_SIZE(pmu_res_updown_tab_4328a0);
432 depend_tab = pmu_res_depend_tab_4328a0;
433 depend_tab_size = ARRAY_SIZE(pmu_res_depend_tab_4328a0);
434 break;
435 case 0x5354:
436 /* The PLL may turn on, if it decides so. */
437 max_msk = 0xFFFFF;
438 break;
439 default:
440 ssb_printk(KERN_ERR PFX
441 "ERROR: PMU resource config unknown for device %04X\n",
442 bus->chip_id);
443 }
444
445 if (updown_tab) {
446 for (i = 0; i < updown_tab_size; i++) {
447 chipco_write32(cc, SSB_CHIPCO_PMU_RES_TABSEL,
448 updown_tab[i].resource);
449 chipco_write32(cc, SSB_CHIPCO_PMU_RES_UPDNTM,
450 updown_tab[i].updown);
451 }
452 }
453 if (depend_tab) {
454 for (i = 0; i < depend_tab_size; i++) {
455 chipco_write32(cc, SSB_CHIPCO_PMU_RES_TABSEL,
456 depend_tab[i].resource);
457 switch (depend_tab[i].task) {
458 case PMU_RES_DEP_SET:
459 chipco_write32(cc, SSB_CHIPCO_PMU_RES_DEPMSK,
460 depend_tab[i].depend);
461 break;
462 case PMU_RES_DEP_ADD:
463 chipco_set32(cc, SSB_CHIPCO_PMU_RES_DEPMSK,
464 depend_tab[i].depend);
465 break;
466 case PMU_RES_DEP_REMOVE:
467 chipco_mask32(cc, SSB_CHIPCO_PMU_RES_DEPMSK,
468 ~(depend_tab[i].depend));
469 break;
470 default:
471 SSB_WARN_ON(1);
472 }
473 }
474 }
475
476 /* Set the resource masks. */
477 if (min_msk)
478 chipco_write32(cc, SSB_CHIPCO_PMU_MINRES_MSK, min_msk);
479 if (max_msk)
480 chipco_write32(cc, SSB_CHIPCO_PMU_MAXRES_MSK, max_msk);
481}
482
483void ssb_pmu_init(struct ssb_chipcommon *cc)
484{
485 struct ssb_bus *bus = cc->dev->bus;
486 u32 pmucap;
487
488 if (!(cc->capabilities & SSB_CHIPCO_CAP_PMU))
489 return;
490
491 pmucap = chipco_read32(cc, SSB_CHIPCO_PMU_CAP);
492 cc->pmu.rev = (pmucap & SSB_CHIPCO_PMU_CAP_REVISION);
493
494 ssb_dprintk(KERN_DEBUG PFX "Found rev %u PMU (capabilities 0x%08X)\n",
495 cc->pmu.rev, pmucap);
496
497 if (cc->pmu.rev >= 1) {
498 if ((bus->chip_id == 0x4325) && (bus->chip_rev < 2)) {
499 chipco_mask32(cc, SSB_CHIPCO_PMU_CTL,
500 ~SSB_CHIPCO_PMU_CTL_NOILPONW);
501 } else {
502 chipco_set32(cc, SSB_CHIPCO_PMU_CTL,
503 SSB_CHIPCO_PMU_CTL_NOILPONW);
504 }
505 }
506 ssb_pmu_pll_init(cc);
507 ssb_pmu_resources_init(cc);
508}
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-16 18:02:13 -0500