diff options
Diffstat (limited to 'drivers/net/wireless/brcm80211/brcmsmac/pmu.c')
| -rw-r--r-- | drivers/net/wireless/brcm80211/brcmsmac/pmu.c | 458 |
1 files changed, 458 insertions, 0 deletions
diff --git a/drivers/net/wireless/brcm80211/brcmsmac/pmu.c b/drivers/net/wireless/brcm80211/brcmsmac/pmu.c new file mode 100644 index 000000000000..3b36e3acfd74 --- /dev/null +++ b/drivers/net/wireless/brcm80211/brcmsmac/pmu.c @@ -0,0 +1,458 @@ +/* + * Copyright (c) 2011 Broadcom Corporation + * + * Permission to use, copy, modify, and/or distribute this software for any + * purpose with or without fee is hereby granted, provided that the above + * copyright notice and this permission notice appear in all copies. + * + * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES + * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY + * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION + * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN + * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + */ + +#include <linux/delay.h> +#include <linux/io.h> + +#include <brcm_hw_ids.h> +#include <chipcommon.h> +#include <brcmu_utils.h> +#include "pub.h" +#include "aiutils.h" +#include "pmu.h" + +/* + * external LPO crystal frequency + */ +#define EXT_ILP_HZ 32768 + +/* + * Duration for ILP clock frequency measurment in milliseconds + * + * remark: 1000 must be an integer multiple of this duration + */ +#define ILP_CALC_DUR 10 + +/* Fields in pmucontrol */ +#define PCTL_ILP_DIV_MASK 0xffff0000 +#define PCTL_ILP_DIV_SHIFT 16 +#define PCTL_PLL_PLLCTL_UPD 0x00000400 /* rev 2 */ +#define PCTL_NOILP_ON_WAIT 0x00000200 /* rev 1 */ +#define PCTL_HT_REQ_EN 0x00000100 +#define PCTL_ALP_REQ_EN 0x00000080 +#define PCTL_XTALFREQ_MASK 0x0000007c +#define PCTL_XTALFREQ_SHIFT 2 +#define PCTL_ILP_DIV_EN 0x00000002 +#define PCTL_LPO_SEL 0x00000001 + +/* ILP clock */ +#define ILP_CLOCK 32000 + +/* ALP clock on pre-PMU chips */ +#define ALP_CLOCK 20000000 + +/* pmustatus */ +#define PST_EXTLPOAVAIL 0x0100 +#define PST_WDRESET 0x0080 +#define PST_INTPEND 0x0040 +#define PST_SBCLKST 0x0030 +#define PST_SBCLKST_ILP 0x0010 +#define PST_SBCLKST_ALP 0x0020 +#define PST_SBCLKST_HT 0x0030 +#define PST_ALPAVAIL 0x0008 +#define PST_HTAVAIL 0x0004 +#define PST_RESINIT 0x0003 + +/* PMU resource bit position */ +#define PMURES_BIT(bit) (1 << (bit)) + +/* PMU corerev and chip specific PLL controls. + * PMU<rev>_PLL<num>_XX where <rev> is PMU corerev and <num> is an arbitrary + * number to differentiate different PLLs controlled by the same PMU rev. + */ +/* pllcontrol registers: + * ndiv_pwrdn, pwrdn_ch<x>, refcomp_pwrdn, dly_ch<x>, + * p1div, p2div, _bypass_sdmod + */ +#define PMU1_PLL0_PLLCTL0 0 +#define PMU1_PLL0_PLLCTL1 1 +#define PMU1_PLL0_PLLCTL2 2 +#define PMU1_PLL0_PLLCTL3 3 +#define PMU1_PLL0_PLLCTL4 4 +#define PMU1_PLL0_PLLCTL5 5 + +/* pmu XtalFreqRatio */ +#define PMU_XTALFREQ_REG_ILPCTR_MASK 0x00001FFF +#define PMU_XTALFREQ_REG_MEASURE_MASK 0x80000000 +#define PMU_XTALFREQ_REG_MEASURE_SHIFT 31 + +/* 4313 resources */ +#define RES4313_BB_PU_RSRC 0 +#define RES4313_ILP_REQ_RSRC 1 +#define RES4313_XTAL_PU_RSRC 2 +#define RES4313_ALP_AVAIL_RSRC 3 +#define RES4313_RADIO_PU_RSRC 4 +#define RES4313_BG_PU_RSRC 5 +#define RES4313_VREG1P4_PU_RSRC 6 +#define RES4313_AFE_PWRSW_RSRC 7 +#define RES4313_RX_PWRSW_RSRC 8 +#define RES4313_TX_PWRSW_RSRC 9 +#define RES4313_BB_PWRSW_RSRC 10 +#define RES4313_SYNTH_PWRSW_RSRC 11 +#define RES4313_MISC_PWRSW_RSRC 12 +#define RES4313_BB_PLL_PWRSW_RSRC 13 +#define RES4313_HT_AVAIL_RSRC 14 +#define RES4313_MACPHY_CLK_AVAIL_RSRC 15 + +/* Determine min/max rsrc masks. Value 0 leaves hardware at default. */ +static void si_pmu_res_masks(struct si_pub *sih, u32 * pmin, u32 * pmax) +{ + u32 min_mask = 0, max_mask = 0; + uint rsrcs; + + /* # resources */ + rsrcs = (sih->pmucaps & PCAP_RC_MASK) >> PCAP_RC_SHIFT; + + /* determine min/max rsrc masks */ + switch (sih->chip) { + case BCM43224_CHIP_ID: + case BCM43225_CHIP_ID: + /* ??? */ + break; + + case BCM4313_CHIP_ID: + min_mask = PMURES_BIT(RES4313_BB_PU_RSRC) | + PMURES_BIT(RES4313_XTAL_PU_RSRC) | + PMURES_BIT(RES4313_ALP_AVAIL_RSRC) | + PMURES_BIT(RES4313_BB_PLL_PWRSW_RSRC); + max_mask = 0xffff; + break; + default: + break; + } + + *pmin = min_mask; + *pmax = max_mask; +} + +static void +si_pmu_spuravoid_pllupdate(struct si_pub *sih, struct chipcregs __iomem *cc, + u8 spuravoid) +{ + u32 tmp = 0; + + switch (sih->chip) { + case BCM43224_CHIP_ID: + case BCM43225_CHIP_ID: + if (spuravoid == 1) { + W_REG(&cc->pllcontrol_addr, PMU1_PLL0_PLLCTL0); + W_REG(&cc->pllcontrol_data, 0x11500010); + W_REG(&cc->pllcontrol_addr, PMU1_PLL0_PLLCTL1); + W_REG(&cc->pllcontrol_data, 0x000C0C06); + W_REG(&cc->pllcontrol_addr, PMU1_PLL0_PLLCTL2); + W_REG(&cc->pllcontrol_data, 0x0F600a08); + W_REG(&cc->pllcontrol_addr, PMU1_PLL0_PLLCTL3); + W_REG(&cc->pllcontrol_data, 0x00000000); + W_REG(&cc->pllcontrol_addr, PMU1_PLL0_PLLCTL4); + W_REG(&cc->pllcontrol_data, 0x2001E920); + W_REG(&cc->pllcontrol_addr, PMU1_PLL0_PLLCTL5); + W_REG(&cc->pllcontrol_data, 0x88888815); + } else { + W_REG(&cc->pllcontrol_addr, PMU1_PLL0_PLLCTL0); + W_REG(&cc->pllcontrol_data, 0x11100010); + W_REG(&cc->pllcontrol_addr, PMU1_PLL0_PLLCTL1); + W_REG(&cc->pllcontrol_data, 0x000c0c06); + W_REG(&cc->pllcontrol_addr, PMU1_PLL0_PLLCTL2); + W_REG(&cc->pllcontrol_data, 0x03000a08); + W_REG(&cc->pllcontrol_addr, PMU1_PLL0_PLLCTL3); + W_REG(&cc->pllcontrol_data, 0x00000000); + W_REG(&cc->pllcontrol_addr, PMU1_PLL0_PLLCTL4); + W_REG(&cc->pllcontrol_data, 0x200005c0); + W_REG(&cc->pllcontrol_addr, PMU1_PLL0_PLLCTL5); + W_REG(&cc->pllcontrol_data, 0x88888815); + } + tmp = 1 << 10; + break; + + W_REG(&cc->pllcontrol_addr, PMU1_PLL0_PLLCTL0); + W_REG(&cc->pllcontrol_data, 0x11100008); + W_REG(&cc->pllcontrol_addr, PMU1_PLL0_PLLCTL1); + W_REG(&cc->pllcontrol_data, 0x0c000c06); + W_REG(&cc->pllcontrol_addr, PMU1_PLL0_PLLCTL2); + W_REG(&cc->pllcontrol_data, 0x03000a08); + W_REG(&cc->pllcontrol_addr, PMU1_PLL0_PLLCTL3); + W_REG(&cc->pllcontrol_data, 0x00000000); + W_REG(&cc->pllcontrol_addr, PMU1_PLL0_PLLCTL4); + W_REG(&cc->pllcontrol_data, 0x200005c0); + W_REG(&cc->pllcontrol_addr, PMU1_PLL0_PLLCTL5); + W_REG(&cc->pllcontrol_data, 0x88888855); + + tmp = 1 << 10; + break; + + default: + /* bail out */ + return; + } + + tmp |= R_REG(&cc->pmucontrol); + W_REG(&cc->pmucontrol, tmp); +} + +u16 si_pmu_fast_pwrup_delay(struct si_pub *sih) +{ + uint delay = PMU_MAX_TRANSITION_DLY; + + switch (sih->chip) { + case BCM43224_CHIP_ID: + case BCM43225_CHIP_ID: + case BCM4313_CHIP_ID: + delay = 3700; + break; + default: + break; + } + + return (u16) delay; +} + +void si_pmu_sprom_enable(struct si_pub *sih, bool enable) +{ + struct chipcregs __iomem *cc; + uint origidx; + + /* Remember original core before switch to chipc */ + origidx = ai_coreidx(sih); + cc = ai_setcoreidx(sih, SI_CC_IDX); + + /* Return to original core */ + ai_setcoreidx(sih, origidx); +} + +/* Read/write a chipcontrol reg */ +u32 si_pmu_chipcontrol(struct si_pub *sih, uint reg, u32 mask, u32 val) +{ + ai_corereg(sih, SI_CC_IDX, offsetof(struct chipcregs, chipcontrol_addr), + ~0, reg); + return ai_corereg(sih, SI_CC_IDX, + offsetof(struct chipcregs, chipcontrol_data), mask, + val); +} + +/* Read/write a regcontrol reg */ +u32 si_pmu_regcontrol(struct si_pub *sih, uint reg, u32 mask, u32 val) +{ + ai_corereg(sih, SI_CC_IDX, offsetof(struct chipcregs, regcontrol_addr), + ~0, reg); + return ai_corereg(sih, SI_CC_IDX, + offsetof(struct chipcregs, regcontrol_data), mask, + val); +} + +/* Read/write a pllcontrol reg */ +u32 si_pmu_pllcontrol(struct si_pub *sih, uint reg, u32 mask, u32 val) +{ + ai_corereg(sih, SI_CC_IDX, offsetof(struct chipcregs, pllcontrol_addr), + ~0, reg); + return ai_corereg(sih, SI_CC_IDX, + offsetof(struct chipcregs, pllcontrol_data), mask, + val); +} + +/* PMU PLL update */ +void si_pmu_pllupd(struct si_pub *sih) +{ + ai_corereg(sih, SI_CC_IDX, offsetof(struct chipcregs, pmucontrol), + PCTL_PLL_PLLCTL_UPD, PCTL_PLL_PLLCTL_UPD); +} + +/* query alp/xtal clock frequency */ +u32 si_pmu_alp_clock(struct si_pub *sih) +{ + u32 clock = ALP_CLOCK; + + /* bail out with default */ + if (!(sih->cccaps & CC_CAP_PMU)) + return clock; + + switch (sih->chip) { + case BCM43224_CHIP_ID: + case BCM43225_CHIP_ID: + case BCM4313_CHIP_ID: + /* always 20Mhz */ + clock = 20000 * 1000; + break; + default: + break; + } + + return clock; +} + +void si_pmu_spuravoid(struct si_pub *sih, u8 spuravoid) +{ + struct chipcregs __iomem *cc; + uint origidx, intr_val; + + /* Remember original core before switch to chipc */ + cc = (struct chipcregs __iomem *) + ai_switch_core(sih, CC_CORE_ID, &origidx, &intr_val); + + /* update the pll changes */ + si_pmu_spuravoid_pllupdate(sih, cc, spuravoid); + + /* Return to original core */ + ai_restore_core(sih, origidx, intr_val); +} + +/* initialize PMU */ +void si_pmu_init(struct si_pub *sih) +{ + struct chipcregs __iomem *cc; + uint origidx; + + /* Remember original core before switch to chipc */ + origidx = ai_coreidx(sih); + cc = ai_setcoreidx(sih, SI_CC_IDX); + + if (sih->pmurev == 1) + AND_REG(&cc->pmucontrol, ~PCTL_NOILP_ON_WAIT); + else if (sih->pmurev >= 2) + OR_REG(&cc->pmucontrol, PCTL_NOILP_ON_WAIT); + + /* Return to original core */ + ai_setcoreidx(sih, origidx); +} + +/* initialize PMU chip controls and other chip level stuff */ +void si_pmu_chip_init(struct si_pub *sih) +{ + uint origidx; + + /* Gate off SPROM clock and chip select signals */ + si_pmu_sprom_enable(sih, false); + + /* Remember original core */ + origidx = ai_coreidx(sih); + + /* Return to original core */ + ai_setcoreidx(sih, origidx); +} + +/* initialize PMU switch/regulators */ +void si_pmu_swreg_init(struct si_pub *sih) +{ +} + +/* initialize PLL */ +void si_pmu_pll_init(struct si_pub *sih, uint xtalfreq) +{ + struct chipcregs __iomem *cc; + uint origidx; + + /* Remember original core before switch to chipc */ + origidx = ai_coreidx(sih); + cc = ai_setcoreidx(sih, SI_CC_IDX); + + switch (sih->chip) { + case BCM4313_CHIP_ID: + case BCM43224_CHIP_ID: + case BCM43225_CHIP_ID: + /* ??? */ + break; + default: + break; + } + + /* Return to original core */ + ai_setcoreidx(sih, origidx); +} + +/* initialize PMU resources */ +void si_pmu_res_init(struct si_pub *sih) +{ + struct chipcregs __iomem *cc; + uint origidx; + u32 min_mask = 0, max_mask = 0; + + /* Remember original core before switch to chipc */ + origidx = ai_coreidx(sih); + cc = ai_setcoreidx(sih, SI_CC_IDX); + + /* Determine min/max rsrc masks */ + si_pmu_res_masks(sih, &min_mask, &max_mask); + + /* It is required to program max_mask first and then min_mask */ + + /* Program max resource mask */ + + if (max_mask) + W_REG(&cc->max_res_mask, max_mask); + + /* Program min resource mask */ + + if (min_mask) + W_REG(&cc->min_res_mask, min_mask); + + /* Add some delay; allow resources to come up and settle. */ + mdelay(2); + + /* Return to original core */ + ai_setcoreidx(sih, origidx); +} + +u32 si_pmu_measure_alpclk(struct si_pub *sih) +{ + struct chipcregs __iomem *cc; + uint origidx; + u32 alp_khz; + + if (sih->pmurev < 10) + return 0; + + /* Remember original core before switch to chipc */ + origidx = ai_coreidx(sih); + cc = ai_setcoreidx(sih, SI_CC_IDX); + + if (R_REG(&cc->pmustatus) & PST_EXTLPOAVAIL) { + u32 ilp_ctr, alp_hz; + + /* + * Enable the reg to measure the freq, + * in case it was disabled before + */ + W_REG(&cc->pmu_xtalfreq, + 1U << PMU_XTALFREQ_REG_MEASURE_SHIFT); + + /* Delay for well over 4 ILP clocks */ + udelay(1000); + + /* Read the latched number of ALP ticks per 4 ILP ticks */ + ilp_ctr = + R_REG(&cc->pmu_xtalfreq) & PMU_XTALFREQ_REG_ILPCTR_MASK; + + /* + * Turn off the PMU_XTALFREQ_REG_MEASURE_SHIFT + * bit to save power + */ + W_REG(&cc->pmu_xtalfreq, 0); + + /* Calculate ALP frequency */ + alp_hz = (ilp_ctr * EXT_ILP_HZ) / 4; + + /* + * Round to nearest 100KHz, and at + * the same time convert to KHz + */ + alp_khz = (alp_hz + 50000) / 100000 * 100; + } else + alp_khz = 0; + + /* Return to original core */ + ai_setcoreidx(sih, origidx); + + return alp_khz; +} |