2 * Broadcom specific AMBA
3 * ChipCommon Power Management Unit driver
5 * Copyright 2009, Michael Buesch <m@bues.ch>
6 * Copyright 2007, Broadcom Corporation
8 * Licensed under the GNU/GPL. See COPYING for details.
11 #include "bcma_private.h"
12 #include <linux/export.h>
13 #include <linux/bcma/bcma.h>
15 static u32 bcma_chipco_pll_read(struct bcma_drv_cc *cc, u32 offset)
17 bcma_cc_write32(cc, BCMA_CC_PLLCTL_ADDR, offset);
18 bcma_cc_read32(cc, BCMA_CC_PLLCTL_ADDR);
19 return bcma_cc_read32(cc, BCMA_CC_PLLCTL_DATA);
22 void bcma_chipco_pll_write(struct bcma_drv_cc *cc, u32 offset, u32 value)
24 bcma_cc_write32(cc, BCMA_CC_PLLCTL_ADDR, offset);
25 bcma_cc_read32(cc, BCMA_CC_PLLCTL_ADDR);
26 bcma_cc_write32(cc, BCMA_CC_PLLCTL_DATA, value);
28 EXPORT_SYMBOL_GPL(bcma_chipco_pll_write);
30 void bcma_chipco_pll_maskset(struct bcma_drv_cc *cc, u32 offset, u32 mask,
33 bcma_cc_write32(cc, BCMA_CC_PLLCTL_ADDR, offset);
34 bcma_cc_read32(cc, BCMA_CC_PLLCTL_ADDR);
35 bcma_cc_maskset32(cc, BCMA_CC_PLLCTL_DATA, mask, set);
37 EXPORT_SYMBOL_GPL(bcma_chipco_pll_maskset);
39 void bcma_chipco_chipctl_maskset(struct bcma_drv_cc *cc,
40 u32 offset, u32 mask, u32 set)
42 bcma_cc_write32(cc, BCMA_CC_CHIPCTL_ADDR, offset);
43 bcma_cc_read32(cc, BCMA_CC_CHIPCTL_ADDR);
44 bcma_cc_maskset32(cc, BCMA_CC_CHIPCTL_DATA, mask, set);
46 EXPORT_SYMBOL_GPL(bcma_chipco_chipctl_maskset);
48 void bcma_chipco_regctl_maskset(struct bcma_drv_cc *cc, u32 offset, u32 mask,
51 bcma_cc_write32(cc, BCMA_CC_REGCTL_ADDR, offset);
52 bcma_cc_read32(cc, BCMA_CC_REGCTL_ADDR);
53 bcma_cc_maskset32(cc, BCMA_CC_REGCTL_DATA, mask, set);
55 EXPORT_SYMBOL_GPL(bcma_chipco_regctl_maskset);
57 static void bcma_pmu_pll_init(struct bcma_drv_cc *cc)
59 struct bcma_bus *bus = cc->core->bus;
61 switch (bus->chipinfo.id) {
68 pr_err("PLL init unknown for device 0x%04X\n",
73 static void bcma_pmu_resources_init(struct bcma_drv_cc *cc)
75 struct bcma_bus *bus = cc->core->bus;
76 u32 min_msk = 0, max_msk = 0;
78 switch (bus->chipinfo.id) {
87 pr_err("PMU resource config unknown for device 0x%04X\n",
91 /* Set the resource masks. */
93 bcma_cc_write32(cc, BCMA_CC_PMU_MINRES_MSK, min_msk);
95 bcma_cc_write32(cc, BCMA_CC_PMU_MAXRES_MSK, max_msk);
98 void bcma_pmu_swreg_init(struct bcma_drv_cc *cc)
100 struct bcma_bus *bus = cc->core->bus;
102 switch (bus->chipinfo.id) {
109 pr_err("PMU switch/regulators init unknown for device "
110 "0x%04X\n", bus->chipinfo.id);
114 /* Disable to allow reading SPROM. Don't know the adventages of enabling it. */
115 void bcma_chipco_bcm4331_ext_pa_lines_ctl(struct bcma_drv_cc *cc, bool enable)
117 struct bcma_bus *bus = cc->core->bus;
120 val = bcma_cc_read32(cc, BCMA_CC_CHIPCTL);
122 val |= BCMA_CHIPCTL_4331_EXTPA_EN;
123 if (bus->chipinfo.pkg == 9 || bus->chipinfo.pkg == 11)
124 val |= BCMA_CHIPCTL_4331_EXTPA_ON_GPIO2_5;
126 val &= ~BCMA_CHIPCTL_4331_EXTPA_EN;
127 val &= ~BCMA_CHIPCTL_4331_EXTPA_ON_GPIO2_5;
129 bcma_cc_write32(cc, BCMA_CC_CHIPCTL, val);
132 void bcma_pmu_workarounds(struct bcma_drv_cc *cc)
134 struct bcma_bus *bus = cc->core->bus;
136 switch (bus->chipinfo.id) {
138 bcma_chipco_chipctl_maskset(cc, 0, ~0, 0x7);
141 /* BCM4331 workaround is SPROM-related, we put it in sprom.c */
144 if (bus->chipinfo.rev == 0) {
145 pr_err("Workarounds for 43224 rev 0 not fully "
147 bcma_chipco_chipctl_maskset(cc, 0, ~0, 0x00F000F0);
149 bcma_chipco_chipctl_maskset(cc, 0, ~0, 0xF0);
155 pr_err("Workarounds unknown for device 0x%04X\n",
160 void bcma_pmu_init(struct bcma_drv_cc *cc)
164 pmucap = bcma_cc_read32(cc, BCMA_CC_PMU_CAP);
165 cc->pmu.rev = (pmucap & BCMA_CC_PMU_CAP_REVISION);
167 pr_debug("Found rev %u PMU (capabilities 0x%08X)\n", cc->pmu.rev,
170 if (cc->pmu.rev == 1)
171 bcma_cc_mask32(cc, BCMA_CC_PMU_CTL,
172 ~BCMA_CC_PMU_CTL_NOILPONW);
174 bcma_cc_set32(cc, BCMA_CC_PMU_CTL,
175 BCMA_CC_PMU_CTL_NOILPONW);
177 if (cc->core->id.id == 0x4329 && cc->core->id.rev == 2)
178 pr_err("Fix for 4329b0 bad LPOM state not implemented!\n");
180 bcma_pmu_pll_init(cc);
181 bcma_pmu_resources_init(cc);
182 bcma_pmu_swreg_init(cc);
183 bcma_pmu_workarounds(cc);
186 u32 bcma_pmu_alp_clock(struct bcma_drv_cc *cc)
188 struct bcma_bus *bus = cc->core->bus;
190 switch (bus->chipinfo.id) {
205 pr_warn("No ALP clock specified for %04X device, "
206 "pmu rev. %d, using default %d Hz\n",
207 bus->chipinfo.id, cc->pmu.rev, BCMA_CC_PMU_ALP_CLOCK);
209 return BCMA_CC_PMU_ALP_CLOCK;
212 /* Find the output of the "m" pll divider given pll controls that start with
213 * pllreg "pll0" i.e. 12 for main 6 for phy, 0 for misc.
215 static u32 bcma_pmu_clock(struct bcma_drv_cc *cc, u32 pll0, u32 m)
217 u32 tmp, div, ndiv, p1, p2, fc;
218 struct bcma_bus *bus = cc->core->bus;
220 BUG_ON((pll0 & 3) || (pll0 > BCMA_CC_PMU4716_MAINPLL_PLL0));
224 if (bus->chipinfo.id == 0x5357 || bus->chipinfo.id == 0x4749) {
225 /* Detect failure in clock setting */
226 tmp = bcma_cc_read32(cc, BCMA_CC_CHIPSTAT);
228 return 133 * 1000000;
231 tmp = bcma_chipco_pll_read(cc, pll0 + BCMA_CC_PPL_P1P2_OFF);
232 p1 = (tmp & BCMA_CC_PPL_P1_MASK) >> BCMA_CC_PPL_P1_SHIFT;
233 p2 = (tmp & BCMA_CC_PPL_P2_MASK) >> BCMA_CC_PPL_P2_SHIFT;
235 tmp = bcma_chipco_pll_read(cc, pll0 + BCMA_CC_PPL_M14_OFF);
236 div = (tmp >> ((m - 1) * BCMA_CC_PPL_MDIV_WIDTH)) &
237 BCMA_CC_PPL_MDIV_MASK;
239 tmp = bcma_chipco_pll_read(cc, pll0 + BCMA_CC_PPL_NM5_OFF);
240 ndiv = (tmp & BCMA_CC_PPL_NDIV_MASK) >> BCMA_CC_PPL_NDIV_SHIFT;
242 /* Do calculation in Mhz */
243 fc = bcma_pmu_alp_clock(cc) / 1000000;
244 fc = (p1 * ndiv * fc) / p2;
246 /* Return clock in Hertz */
247 return (fc / div) * 1000000;
250 /* query bus clock frequency for PMU-enabled chipcommon */
251 u32 bcma_pmu_get_clockcontrol(struct bcma_drv_cc *cc)
253 struct bcma_bus *bus = cc->core->bus;
255 switch (bus->chipinfo.id) {
259 return bcma_pmu_clock(cc, BCMA_CC_PMU4716_MAINPLL_PLL0,
260 BCMA_CC_PMU5_MAINPLL_SSB);
262 return bcma_pmu_clock(cc, BCMA_CC_PMU5356_MAINPLL_PLL0,
263 BCMA_CC_PMU5_MAINPLL_SSB);
266 return bcma_pmu_clock(cc, BCMA_CC_PMU5357_MAINPLL_PLL0,
267 BCMA_CC_PMU5_MAINPLL_SSB);
269 return bcma_pmu_clock(cc, BCMA_CC_PMU4706_MAINPLL_PLL0,
270 BCMA_CC_PMU5_MAINPLL_SSB);
274 pr_warn("No backplane clock specified for %04X device, "
275 "pmu rev. %d, using default %d Hz\n",
276 bus->chipinfo.id, cc->pmu.rev, BCMA_CC_PMU_HT_CLOCK);
278 return BCMA_CC_PMU_HT_CLOCK;
281 /* query cpu clock frequency for PMU-enabled chipcommon */
282 u32 bcma_pmu_get_clockcpu(struct bcma_drv_cc *cc)
284 struct bcma_bus *bus = cc->core->bus;
286 if (bus->chipinfo.id == 53572)
289 if (cc->pmu.rev >= 5) {
291 switch (bus->chipinfo.id) {
293 pll = BCMA_CC_PMU5356_MAINPLL_PLL0;
297 pll = BCMA_CC_PMU5357_MAINPLL_PLL0;
300 pll = BCMA_CC_PMU4716_MAINPLL_PLL0;
304 /* TODO: if (bus->chipinfo.id == 0x5300)
305 return si_4706_pmu_clock(sih, osh, cc, PMU4706_MAINPLL_PLL0, PMU5_MAINPLL_CPU); */
306 return bcma_pmu_clock(cc, pll, BCMA_CC_PMU5_MAINPLL_CPU);
309 return bcma_pmu_get_clockcontrol(cc);