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Commit | Line | Data |
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8369ae33 RM |
1 | /* |
2 | * Broadcom specific AMBA | |
3 | * ChipCommon Power Management Unit driver | |
4 | * | |
eb032b98 | 5 | * Copyright 2009, Michael Buesch <m@bues.ch> |
8369ae33 RM |
6 | * Copyright 2007, Broadcom Corporation |
7 | * | |
8 | * Licensed under the GNU/GPL. See COPYING for details. | |
9 | */ | |
10 | ||
11 | #include "bcma_private.h" | |
12 | #include <linux/bcma/bcma.h> | |
13 | ||
908debc8 HM |
14 | static u32 bcma_chipco_pll_read(struct bcma_drv_cc *cc, u32 offset) |
15 | { | |
16 | bcma_cc_write32(cc, BCMA_CC_PLLCTL_ADDR, offset); | |
17 | bcma_cc_read32(cc, BCMA_CC_PLLCTL_ADDR); | |
18 | return bcma_cc_read32(cc, BCMA_CC_PLLCTL_DATA); | |
19 | } | |
20 | ||
8369ae33 RM |
21 | static void bcma_chipco_chipctl_maskset(struct bcma_drv_cc *cc, |
22 | u32 offset, u32 mask, u32 set) | |
23 | { | |
24 | u32 value; | |
25 | ||
26 | bcma_cc_read32(cc, BCMA_CC_CHIPCTL_ADDR); | |
27 | bcma_cc_write32(cc, BCMA_CC_CHIPCTL_ADDR, offset); | |
28 | bcma_cc_read32(cc, BCMA_CC_CHIPCTL_ADDR); | |
29 | value = bcma_cc_read32(cc, BCMA_CC_CHIPCTL_DATA); | |
30 | value &= mask; | |
31 | value |= set; | |
32 | bcma_cc_write32(cc, BCMA_CC_CHIPCTL_DATA, value); | |
33 | bcma_cc_read32(cc, BCMA_CC_CHIPCTL_DATA); | |
34 | } | |
35 | ||
36 | static void bcma_pmu_pll_init(struct bcma_drv_cc *cc) | |
37 | { | |
38 | struct bcma_bus *bus = cc->core->bus; | |
39 | ||
40 | switch (bus->chipinfo.id) { | |
41 | case 0x4313: | |
42 | case 0x4331: | |
43 | case 43224: | |
44 | case 43225: | |
45 | break; | |
46 | default: | |
47 | pr_err("PLL init unknown for device 0x%04X\n", | |
48 | bus->chipinfo.id); | |
49 | } | |
50 | } | |
51 | ||
52 | static void bcma_pmu_resources_init(struct bcma_drv_cc *cc) | |
53 | { | |
54 | struct bcma_bus *bus = cc->core->bus; | |
55 | u32 min_msk = 0, max_msk = 0; | |
56 | ||
57 | switch (bus->chipinfo.id) { | |
58 | case 0x4313: | |
59 | min_msk = 0x200D; | |
60 | max_msk = 0xFFFF; | |
61 | break; | |
62 | case 43224: | |
91fa4b0a | 63 | case 43225: |
8369ae33 RM |
64 | break; |
65 | default: | |
66 | pr_err("PMU resource config unknown for device 0x%04X\n", | |
67 | bus->chipinfo.id); | |
68 | } | |
69 | ||
70 | /* Set the resource masks. */ | |
71 | if (min_msk) | |
72 | bcma_cc_write32(cc, BCMA_CC_PMU_MINRES_MSK, min_msk); | |
73 | if (max_msk) | |
74 | bcma_cc_write32(cc, BCMA_CC_PMU_MAXRES_MSK, max_msk); | |
75 | } | |
76 | ||
77 | void bcma_pmu_swreg_init(struct bcma_drv_cc *cc) | |
78 | { | |
79 | struct bcma_bus *bus = cc->core->bus; | |
80 | ||
81 | switch (bus->chipinfo.id) { | |
82 | case 0x4313: | |
83 | case 0x4331: | |
84 | case 43224: | |
91fa4b0a | 85 | case 43225: |
8369ae33 RM |
86 | break; |
87 | default: | |
88 | pr_err("PMU switch/regulators init unknown for device " | |
89 | "0x%04X\n", bus->chipinfo.id); | |
90 | } | |
91 | } | |
92 | ||
93 | void bcma_pmu_workarounds(struct bcma_drv_cc *cc) | |
94 | { | |
95 | struct bcma_bus *bus = cc->core->bus; | |
96 | ||
97 | switch (bus->chipinfo.id) { | |
98 | case 0x4313: | |
99 | bcma_chipco_chipctl_maskset(cc, 0, ~0, 0x7); | |
100 | break; | |
101 | case 0x4331: | |
102 | pr_err("Enabling Ext PA lines not implemented\n"); | |
103 | break; | |
104 | case 43224: | |
105 | if (bus->chipinfo.rev == 0) { | |
106 | pr_err("Workarounds for 43224 rev 0 not fully " | |
107 | "implemented\n"); | |
898f699e | 108 | bcma_chipco_chipctl_maskset(cc, 0, ~0, 0x00F000F0); |
8369ae33 RM |
109 | } else { |
110 | bcma_chipco_chipctl_maskset(cc, 0, ~0, 0xF0); | |
111 | } | |
112 | break; | |
91fa4b0a RM |
113 | case 43225: |
114 | break; | |
8369ae33 RM |
115 | default: |
116 | pr_err("Workarounds unknown for device 0x%04X\n", | |
117 | bus->chipinfo.id); | |
118 | } | |
119 | } | |
120 | ||
121 | void bcma_pmu_init(struct bcma_drv_cc *cc) | |
122 | { | |
123 | u32 pmucap; | |
124 | ||
125 | pmucap = bcma_cc_read32(cc, BCMA_CC_PMU_CAP); | |
126 | cc->pmu.rev = (pmucap & BCMA_CC_PMU_CAP_REVISION); | |
127 | ||
128 | pr_debug("Found rev %u PMU (capabilities 0x%08X)\n", cc->pmu.rev, | |
129 | pmucap); | |
130 | ||
131 | if (cc->pmu.rev == 1) | |
132 | bcma_cc_mask32(cc, BCMA_CC_PMU_CTL, | |
133 | ~BCMA_CC_PMU_CTL_NOILPONW); | |
134 | else | |
135 | bcma_cc_set32(cc, BCMA_CC_PMU_CTL, | |
136 | BCMA_CC_PMU_CTL_NOILPONW); | |
137 | ||
138 | if (cc->core->id.id == 0x4329 && cc->core->id.rev == 2) | |
139 | pr_err("Fix for 4329b0 bad LPOM state not implemented!\n"); | |
140 | ||
141 | bcma_pmu_pll_init(cc); | |
142 | bcma_pmu_resources_init(cc); | |
143 | bcma_pmu_swreg_init(cc); | |
144 | bcma_pmu_workarounds(cc); | |
145 | } | |
e3afe0e5 HM |
146 | |
147 | u32 bcma_pmu_alp_clock(struct bcma_drv_cc *cc) | |
148 | { | |
149 | struct bcma_bus *bus = cc->core->bus; | |
150 | ||
151 | switch (bus->chipinfo.id) { | |
152 | case 0x4716: | |
153 | case 0x4748: | |
154 | case 47162: | |
155 | case 0x4313: | |
156 | case 0x5357: | |
157 | case 0x4749: | |
158 | case 53572: | |
159 | /* always 20Mhz */ | |
160 | return 20000 * 1000; | |
161 | case 0x5356: | |
162 | case 0x5300: | |
163 | /* always 25Mhz */ | |
164 | return 25000 * 1000; | |
165 | default: | |
166 | pr_warn("No ALP clock specified for %04X device, " | |
167 | "pmu rev. %d, using default %d Hz\n", | |
168 | bus->chipinfo.id, cc->pmu.rev, BCMA_CC_PMU_ALP_CLOCK); | |
169 | } | |
170 | return BCMA_CC_PMU_ALP_CLOCK; | |
171 | } | |
908debc8 HM |
172 | |
173 | /* Find the output of the "m" pll divider given pll controls that start with | |
174 | * pllreg "pll0" i.e. 12 for main 6 for phy, 0 for misc. | |
175 | */ | |
176 | static u32 bcma_pmu_clock(struct bcma_drv_cc *cc, u32 pll0, u32 m) | |
177 | { | |
178 | u32 tmp, div, ndiv, p1, p2, fc; | |
179 | struct bcma_bus *bus = cc->core->bus; | |
180 | ||
181 | BUG_ON((pll0 & 3) || (pll0 > BCMA_CC_PMU4716_MAINPLL_PLL0)); | |
182 | ||
183 | BUG_ON(!m || m > 4); | |
184 | ||
185 | if (bus->chipinfo.id == 0x5357 || bus->chipinfo.id == 0x4749) { | |
186 | /* Detect failure in clock setting */ | |
187 | tmp = bcma_cc_read32(cc, BCMA_CC_CHIPSTAT); | |
188 | if (tmp & 0x40000) | |
189 | return 133 * 1000000; | |
190 | } | |
191 | ||
192 | tmp = bcma_chipco_pll_read(cc, pll0 + BCMA_CC_PPL_P1P2_OFF); | |
193 | p1 = (tmp & BCMA_CC_PPL_P1_MASK) >> BCMA_CC_PPL_P1_SHIFT; | |
194 | p2 = (tmp & BCMA_CC_PPL_P2_MASK) >> BCMA_CC_PPL_P2_SHIFT; | |
195 | ||
196 | tmp = bcma_chipco_pll_read(cc, pll0 + BCMA_CC_PPL_M14_OFF); | |
197 | div = (tmp >> ((m - 1) * BCMA_CC_PPL_MDIV_WIDTH)) & | |
198 | BCMA_CC_PPL_MDIV_MASK; | |
199 | ||
200 | tmp = bcma_chipco_pll_read(cc, pll0 + BCMA_CC_PPL_NM5_OFF); | |
201 | ndiv = (tmp & BCMA_CC_PPL_NDIV_MASK) >> BCMA_CC_PPL_NDIV_SHIFT; | |
202 | ||
203 | /* Do calculation in Mhz */ | |
204 | fc = bcma_pmu_alp_clock(cc) / 1000000; | |
205 | fc = (p1 * ndiv * fc) / p2; | |
206 | ||
207 | /* Return clock in Hertz */ | |
208 | return (fc / div) * 1000000; | |
209 | } | |
210 | ||
211 | /* query bus clock frequency for PMU-enabled chipcommon */ | |
212 | u32 bcma_pmu_get_clockcontrol(struct bcma_drv_cc *cc) | |
213 | { | |
214 | struct bcma_bus *bus = cc->core->bus; | |
215 | ||
216 | switch (bus->chipinfo.id) { | |
217 | case 0x4716: | |
218 | case 0x4748: | |
219 | case 47162: | |
220 | return bcma_pmu_clock(cc, BCMA_CC_PMU4716_MAINPLL_PLL0, | |
221 | BCMA_CC_PMU5_MAINPLL_SSB); | |
222 | case 0x5356: | |
223 | return bcma_pmu_clock(cc, BCMA_CC_PMU5356_MAINPLL_PLL0, | |
224 | BCMA_CC_PMU5_MAINPLL_SSB); | |
225 | case 0x5357: | |
226 | case 0x4749: | |
227 | return bcma_pmu_clock(cc, BCMA_CC_PMU5357_MAINPLL_PLL0, | |
228 | BCMA_CC_PMU5_MAINPLL_SSB); | |
229 | case 0x5300: | |
230 | return bcma_pmu_clock(cc, BCMA_CC_PMU4706_MAINPLL_PLL0, | |
231 | BCMA_CC_PMU5_MAINPLL_SSB); | |
232 | case 53572: | |
233 | return 75000000; | |
234 | default: | |
235 | pr_warn("No backplane clock specified for %04X device, " | |
236 | "pmu rev. %d, using default %d Hz\n", | |
237 | bus->chipinfo.id, cc->pmu.rev, BCMA_CC_PMU_HT_CLOCK); | |
238 | } | |
239 | return BCMA_CC_PMU_HT_CLOCK; | |
240 | } | |
241 | ||
242 | /* query cpu clock frequency for PMU-enabled chipcommon */ | |
243 | u32 bcma_pmu_get_clockcpu(struct bcma_drv_cc *cc) | |
244 | { | |
245 | struct bcma_bus *bus = cc->core->bus; | |
246 | ||
247 | if (bus->chipinfo.id == 53572) | |
248 | return 300000000; | |
249 | ||
250 | if (cc->pmu.rev >= 5) { | |
251 | u32 pll; | |
252 | switch (bus->chipinfo.id) { | |
253 | case 0x5356: | |
254 | pll = BCMA_CC_PMU5356_MAINPLL_PLL0; | |
255 | break; | |
256 | case 0x5357: | |
257 | case 0x4749: | |
258 | pll = BCMA_CC_PMU5357_MAINPLL_PLL0; | |
259 | break; | |
260 | default: | |
261 | pll = BCMA_CC_PMU4716_MAINPLL_PLL0; | |
262 | break; | |
263 | } | |
264 | ||
265 | /* TODO: if (bus->chipinfo.id == 0x5300) | |
266 | return si_4706_pmu_clock(sih, osh, cc, PMU4706_MAINPLL_PLL0, PMU5_MAINPLL_CPU); */ | |
267 | return bcma_pmu_clock(cc, pll, BCMA_CC_PMU5_MAINPLL_CPU); | |
268 | } | |
269 | ||
270 | return bcma_pmu_get_clockcontrol(cc); | |
271 | } |