1 /* 2 * Copyright (c) 2011 Broadcom Corporation 3 * 4 * Permission to use, copy, modify, and/or distribute this software for any 5 * purpose with or without fee is hereby granted, provided that the above 6 * copyright notice and this permission notice appear in all copies. 7 * 8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY 11 * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION 13 * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN 14 * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 15 */ 16 17 #include <linux/delay.h> 18 #include <linux/io.h> 19 20 #include <brcm_hw_ids.h> 21 #include <chipcommon.h> 22 #include <brcmu_utils.h> 23 #include "pub.h" 24 #include "aiutils.h" 25 #include "pmu.h" 26 #include "soc.h" 27 28 /* 29 * external LPO crystal frequency 30 */ 31 #define EXT_ILP_HZ 32768 32 33 /* 34 * Duration for ILP clock frequency measurment in milliseconds 35 * 36 * remark: 1000 must be an integer multiple of this duration 37 */ 38 #define ILP_CALC_DUR 10 39 40 /* Fields in pmucontrol */ 41 #define PCTL_ILP_DIV_MASK 0xffff0000 42 #define PCTL_ILP_DIV_SHIFT 16 43 #define PCTL_PLL_PLLCTL_UPD 0x00000400 /* rev 2 */ 44 #define PCTL_NOILP_ON_WAIT 0x00000200 /* rev 1 */ 45 #define PCTL_HT_REQ_EN 0x00000100 46 #define PCTL_ALP_REQ_EN 0x00000080 47 #define PCTL_XTALFREQ_MASK 0x0000007c 48 #define PCTL_XTALFREQ_SHIFT 2 49 #define PCTL_ILP_DIV_EN 0x00000002 50 #define PCTL_LPO_SEL 0x00000001 51 52 /* ILP clock */ 53 #define ILP_CLOCK 32000 54 55 /* ALP clock on pre-PMU chips */ 56 #define ALP_CLOCK 20000000 57 58 /* pmustatus */ 59 #define PST_EXTLPOAVAIL 0x0100 60 #define PST_WDRESET 0x0080 61 #define PST_INTPEND 0x0040 62 #define PST_SBCLKST 0x0030 63 #define PST_SBCLKST_ILP 0x0010 64 #define PST_SBCLKST_ALP 0x0020 65 #define PST_SBCLKST_HT 0x0030 66 #define PST_ALPAVAIL 0x0008 67 #define PST_HTAVAIL 0x0004 68 #define PST_RESINIT 0x0003 69 70 /* PMU resource bit position */ 71 #define PMURES_BIT(bit) (1 << (bit)) 72 73 /* PMU corerev and chip specific PLL controls. 74 * PMU<rev>_PLL<num>_XX where <rev> is PMU corerev and <num> is an arbitrary 75 * number to differentiate different PLLs controlled by the same PMU rev. 76 */ 77 78 /* pmu XtalFreqRatio */ 79 #define PMU_XTALFREQ_REG_ILPCTR_MASK 0x00001FFF 80 #define PMU_XTALFREQ_REG_MEASURE_MASK 0x80000000 81 #define PMU_XTALFREQ_REG_MEASURE_SHIFT 31 82 83 /* 4313 resources */ 84 #define RES4313_BB_PU_RSRC 0 85 #define RES4313_ILP_REQ_RSRC 1 86 #define RES4313_XTAL_PU_RSRC 2 87 #define RES4313_ALP_AVAIL_RSRC 3 88 #define RES4313_RADIO_PU_RSRC 4 89 #define RES4313_BG_PU_RSRC 5 90 #define RES4313_VREG1P4_PU_RSRC 6 91 #define RES4313_AFE_PWRSW_RSRC 7 92 #define RES4313_RX_PWRSW_RSRC 8 93 #define RES4313_TX_PWRSW_RSRC 9 94 #define RES4313_BB_PWRSW_RSRC 10 95 #define RES4313_SYNTH_PWRSW_RSRC 11 96 #define RES4313_MISC_PWRSW_RSRC 12 97 #define RES4313_BB_PLL_PWRSW_RSRC 13 98 #define RES4313_HT_AVAIL_RSRC 14 99 #define RES4313_MACPHY_CLK_AVAIL_RSRC 15 100 si_pmu_fast_pwrup_delay(struct si_pub * sih)101 u16 si_pmu_fast_pwrup_delay(struct si_pub *sih) 102 { 103 uint delay = PMU_MAX_TRANSITION_DLY; 104 105 switch (ai_get_chip_id(sih)) { 106 case BCMA_CHIP_ID_BCM43224: 107 case BCMA_CHIP_ID_BCM43225: 108 case BCMA_CHIP_ID_BCM4313: 109 delay = 3700; 110 break; 111 default: 112 break; 113 } 114 115 return (u16) delay; 116 } 117 si_pmu_measure_alpclk(struct si_pub * sih)118 u32 si_pmu_measure_alpclk(struct si_pub *sih) 119 { 120 struct si_info *sii = container_of(sih, struct si_info, pub); 121 struct bcma_device *core; 122 u32 alp_khz; 123 124 if (ai_get_pmurev(sih) < 10) 125 return 0; 126 127 /* Remember original core before switch to chipc */ 128 core = sii->icbus->drv_cc.core; 129 130 if (bcma_read32(core, CHIPCREGOFFS(pmustatus)) & PST_EXTLPOAVAIL) { 131 u32 ilp_ctr, alp_hz; 132 133 /* 134 * Enable the reg to measure the freq, 135 * in case it was disabled before 136 */ 137 bcma_write32(core, CHIPCREGOFFS(pmu_xtalfreq), 138 1U << PMU_XTALFREQ_REG_MEASURE_SHIFT); 139 140 /* Delay for well over 4 ILP clocks */ 141 udelay(1000); 142 143 /* Read the latched number of ALP ticks per 4 ILP ticks */ 144 ilp_ctr = bcma_read32(core, CHIPCREGOFFS(pmu_xtalfreq)) & 145 PMU_XTALFREQ_REG_ILPCTR_MASK; 146 147 /* 148 * Turn off the PMU_XTALFREQ_REG_MEASURE_SHIFT 149 * bit to save power 150 */ 151 bcma_write32(core, CHIPCREGOFFS(pmu_xtalfreq), 0); 152 153 /* Calculate ALP frequency */ 154 alp_hz = (ilp_ctr * EXT_ILP_HZ) / 4; 155 156 /* 157 * Round to nearest 100KHz, and at 158 * the same time convert to KHz 159 */ 160 alp_khz = (alp_hz + 50000) / 100000 * 100; 161 } else 162 alp_khz = 0; 163 164 return alp_khz; 165 } 166