/*
* 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"
#include "soc.h"
/*
* external LPO crystal frequency
*/
#define EXT_ILP_HZ 32768
/*
* Duration for ILP clock frequency measurement 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 0 xffff0000
#define PCTL_ILP_DIV_SHIFT 16
#define PCTL_PLL_PLLCTL_UPD 0 x00000400 /* rev 2 */
#define PCTL_NOILP_ON_WAIT 0 x00000200 /* rev 1 */
#define PCTL_HT_REQ_EN 0 x00000100
#define PCTL_ALP_REQ_EN 0 x00000080
#define PCTL_XTALFREQ_MASK 0 x0000007c
#define PCTL_XTALFREQ_SHIFT 2
#define PCTL_ILP_DIV_EN 0 x00000002
#define PCTL_LPO_SEL 0 x00000001
/* ILP clock */
#define ILP_CLOCK 32000
/* ALP clock on pre-PMU chips */
#define ALP_CLOCK 20000000
/* pmustatus */
#define PST_EXTLPOAVAIL 0 x0100
#define PST_WDRESET 0 x0080
#define PST_INTPEND 0 x0040
#define PST_SBCLKST 0 x0030
#define PST_SBCLKST_ILP 0 x0010
#define PST_SBCLKST_ALP 0 x0020
#define PST_SBCLKST_HT 0 x0030
#define PST_ALPAVAIL 0 x0008
#define PST_HTAVAIL 0 x0004
#define PST_RESINIT 0 x0003
/* 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 .
*/
/* pmu XtalFreqRatio */
#define PMU_XTALFREQ_REG_ILPCTR_MASK 0 x00001FFF
#define PMU_XTALFREQ_REG_MEASURE_MASK 0 x80000000
#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
u16 si_pmu_fast_pwrup_delay(struct si_pub *sih)
{
uint delay = PMU_MAX_TRANSITION_DLY;
switch (ai_get_chip_id(sih)) {
case BCMA_CHIP_ID_BCM43224:
case BCMA_CHIP_ID_BCM43225:
case BCMA_CHIP_ID_BCM4313:
delay = 3700 ;
break ;
default :
break ;
}
return (u16) delay;
}
u32 si_pmu_measure_alpclk(struct si_pub *sih)
{
struct si_info *sii = container_of(sih, struct si_info, pub);
struct bcma_device *core;
u32 alp_khz;
if (ai_get_pmurev(sih) < 10 )
return 0 ;
/* Remember original core before switch to chipc */
core = sii->icbus->drv_cc.core;
if (bcma_read32(core, CHIPCREGOFFS(pmustatus)) & PST_EXTLPOAVAIL) {
u32 ilp_ctr, alp_hz;
/*
* Enable the reg to measure the freq ,
* in case it was disabled before
*/
bcma_write32(core, CHIPCREGOFFS(pmu_xtalfreq),
1 U << 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 = bcma_read32(core, CHIPCREGOFFS(pmu_xtalfreq)) &
PMU_XTALFREQ_REG_ILPCTR_MASK;
/*
* Turn off the PMU_XTALFREQ_REG_MEASURE_SHIFT
* bit to save power
*/
bcma_write32(core, CHIPCREGOFFS(pmu_xtalfreq), 0 );
/* Calculate ALP frequency */
alp_hz = (ilp_ctr * EXT_ILP_HZ) / 4 ;
/*
* Round to nearest 100 KHz , and at
* the same time convert to KHz
*/
alp_khz = (alp_hz + 50000 ) / 100000 * 100 ;
} else
alp_khz = 0 ;
return alp_khz;
}
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(vorverarbeitet am 2026-10-05)
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