drivers/net/wireless/bcmdhd/hndpmu.c - linux-imx - Git at Google

 /*
  * Misc utility routines for accessing PMU corerev specific features
  * of the SiliconBackplane-based Broadcom chips.
  *
  * Copyright (C) 1999-2016, Broadcom Corporation
  *
  *      Unless you and Broadcom execute a separate written software license
  * agreement governing use of this software, this software is licensed to you
  * under the terms of the GNU General Public License version 2 (the "GPL"),
  * available at http://www.broadcom.com/licenses/GPLv2.php, with the
  * following added to such license:
  *
  *      As a special exception, the copyright holders of this software give you
  * permission to link this software with independent modules, and to copy and
  * distribute the resulting executable under terms of your choice, provided that
  * you also meet, for each linked independent module, the terms and conditions of
  * the license of that module.  An independent module is a module which is not
  * derived from this software.  The special exception does not apply to any
  * modifications of the software.
  *
  *      Notwithstanding the above, under no circumstances may you combine this
  * software in any way with any other Broadcom software provided under a license
  * other than the GPL, without Broadcom's express prior written consent.
  *
  * $Id: hndpmu.c 530682 2015-01-30 18:48:21Z $
  */


 /*
  * Note: this file contains PLL/FLL related functions. A chip can contain multiple PLLs/FLLs.
  * However, in the context of this file the baseband ('BB') PLL/FLL is referred to.
  *
  * Throughout this code, the prefixes 'pmu0_', 'pmu1_' and 'pmu2_' are used.
  * They refer to different revisions of the PMU (which is at revision 18 @ Apr 25, 2012)
  * pmu1_ marks the transition from PLL to ADFLL (Digital Frequency Locked Loop). It supports
  * fractional frequency generation. pmu2_ does not support fractional frequency generation.
  */

 #include <bcm_cfg.h>
 #include <typedefs.h>
 #include <bcmdefs.h>
 #include <osl.h>
 #include <bcmutils.h>
 #include <siutils.h>
 #include <bcmdevs.h>
 #include <hndsoc.h>
 #include <sbchipc.h>
 #include <hndpmu.h>

 #define	PMU_ERROR(args)

 #define	PMU_MSG(args)

 /* To check in verbose debugging messages not intended
  * to be on except on private builds.
  */
 #define	PMU_NONE(args)

 /** contains resource bit positions for a specific chip */
 struct rsc_per_chip_s {
 	uint8 ht_avail;
 	uint8 macphy_clkavail;
 	uint8 ht_start;
 	uint8 otp_pu;
 };

 typedef struct rsc_per_chip_s rsc_per_chip_t;


 /* SDIO Pad drive strength to select value mappings.
  * The last strength value in each table must be 0 (the tri-state value).
  */
 typedef struct {
 	uint8 strength;			/* Pad Drive Strength in mA */
 	uint8 sel;			/* Chip-specific select value */
 } sdiod_drive_str_t;

 /* SDIO Drive Strength to sel value table for PMU Rev 1 */
 static const sdiod_drive_str_t sdiod_drive_strength_tab1[] = {
 	{4, 0x2},
 	{2, 0x3},
 	{1, 0x0},
 	{0, 0x0} };

 /* SDIO Drive Strength to sel value table for PMU Rev 2, 3 */
 static const sdiod_drive_str_t sdiod_drive_strength_tab2[] = {
 	{12, 0x7},
 	{10, 0x6},
 	{8, 0x5},
 	{6, 0x4},
 	{4, 0x2},
 	{2, 0x1},
 	{0, 0x0} };

 /* SDIO Drive Strength to sel value table for PMU Rev 8 (1.8V) */
 static const sdiod_drive_str_t sdiod_drive_strength_tab3[] = {
 	{32, 0x7},
 	{26, 0x6},
 	{22, 0x5},
 	{16, 0x4},
 	{12, 0x3},
 	{8, 0x2},
 	{4, 0x1},
 	{0, 0x0} };

 /* SDIO Drive Strength to sel value table for PMU Rev 11 (1.8v) */
 static const sdiod_drive_str_t sdiod_drive_strength_tab4_1v8[] = {
 	{32, 0x6},
 	{26, 0x7},
 	{22, 0x4},
 	{16, 0x5},
 	{12, 0x2},
 	{8, 0x3},
 	{4, 0x0},
 	{0, 0x1} };

 /* SDIO Drive Strength to sel value table for PMU Rev 11 (1.2v) */

 /* SDIO Drive Strength to sel value table for PMU Rev 11 (2.5v) */

 /* SDIO Drive Strength to sel value table for PMU Rev 13 (1.8v) */
 static const sdiod_drive_str_t sdiod_drive_strength_tab5_1v8[] = {
 	{6, 0x7},
 	{5, 0x6},
 	{4, 0x5},
 	{3, 0x4},
 	{2, 0x2},
 	{1, 0x1},
 	{0, 0x0} };

 /* SDIO Drive Strength to sel value table for PMU Rev 13 (3.3v) */

 /** SDIO Drive Strength to sel value table for PMU Rev 17 (1.8v) */
 static const sdiod_drive_str_t sdiod_drive_strength_tab6_1v8[] = {
 	{3, 0x3},
 	{2, 0x2},
 	{1, 0x1},
 	{0, 0x0} };


 /**
  * SDIO Drive Strength to sel value table for 43143 PMU Rev 17, see Confluence 43143 Toplevel
  * architecture page, section 'PMU Chip Control 1 Register definition', click link to picture
  * BCM43143_sel_sdio_signals.jpg. Valid after PMU Chip Control 0 Register, bit31 (override) has
  * been written '1'.
  */
 #if !defined(BCM_SDIO_VDDIO) || BCM_SDIO_VDDIO == 33

 static const sdiod_drive_str_t sdiod_drive_strength_tab7_3v3[] = {
 	/* note: for 14, 10, 6 and 2mA hw timing is not met according to rtl team */
 	{16, 0x7},
 	{12, 0x5},
 	{8,  0x3},
 	{4,  0x1} }; /* note: 43143 does not support tristate */

 #else

 static const sdiod_drive_str_t sdiod_drive_strength_tab7_1v8[] = {
 	/* note: for 7, 5, 3 and 1mA hw timing is not met according to rtl team */
 	{8, 0x7},
 	{6, 0x5},
 	{4,  0x3},
 	{2,  0x1} }; /* note: 43143 does not support tristate */

 #endif /* BCM_SDIO_VDDIO */

 #define SDIOD_DRVSTR_KEY(chip, pmu)	(((chip) << 16) | (pmu))

 /**
  * Balance between stable SDIO operation and power consumption is achieved using this function.
  * Note that each drive strength table is for a specific VDDIO of the SDIO pads, ideally this
  * function should read the VDDIO itself to select the correct table. For now it has been solved
  * with the 'BCM_SDIO_VDDIO' preprocessor constant.
  *
  * 'drivestrength': desired pad drive strength in mA. Drive strength of 0 requests tri-state (if
  *		    hardware supports this), if no hw support drive strength is not programmed.
  */
 void
 si_sdiod_drive_strength_init(si_t *sih, osl_t *osh, uint32 drivestrength)
 {
 	chipcregs_t *cc;
 	uint origidx, intr_val = 0;
 	sdiod_drive_str_t *str_tab = NULL;
 	uint32 str_mask = 0;	/* only alter desired bits in PMU chipcontrol 1 register */
 	uint32 str_shift = 0;
 	uint32 str_ovr_pmuctl = PMU_CHIPCTL0; /* PMU chipcontrol register containing override bit */
 	uint32 str_ovr_pmuval = 0;            /* position of bit within this register */

 	if (!(sih->cccaps & CC_CAP_PMU)) {
 		return;
 	}

 	/* Remember original core before switch to chipc */
 	cc = (chipcregs_t *) si_switch_core(sih, CC_CORE_ID, &origidx, &intr_val);

 	switch (SDIOD_DRVSTR_KEY(sih->chip, sih->pmurev)) {
 	case SDIOD_DRVSTR_KEY(BCM4325_CHIP_ID, 1):
 		str_tab = (sdiod_drive_str_t *)&sdiod_drive_strength_tab1;
 		str_mask = 0x30000000;
 		str_shift = 28;
 		break;
 	case SDIOD_DRVSTR_KEY(BCM4325_CHIP_ID, 2):
 	case SDIOD_DRVSTR_KEY(BCM4325_CHIP_ID, 3):
 	case SDIOD_DRVSTR_KEY(BCM4315_CHIP_ID, 4):
 		str_tab = (sdiod_drive_str_t *)&sdiod_drive_strength_tab2;
 		str_mask = 0x00003800;
 		str_shift = 11;
 		break;
 	case SDIOD_DRVSTR_KEY(BCM4336_CHIP_ID, 8):
 	case SDIOD_DRVSTR_KEY(BCM4336_CHIP_ID, 11):
 		if (sih->pmurev == 8) {
 			str_tab = (sdiod_drive_str_t *)&sdiod_drive_strength_tab3;
 		}
 		else if (sih->pmurev == 11) {
 			str_tab = (sdiod_drive_str_t *)&sdiod_drive_strength_tab4_1v8;
 		}
 		str_mask = 0x00003800;
 		str_shift = 11;
 		break;
 	case SDIOD_DRVSTR_KEY(BCM4330_CHIP_ID, 12):
 		str_tab = (sdiod_drive_str_t *)&sdiod_drive_strength_tab4_1v8;
 		str_mask = 0x00003800;
 		str_shift = 11;
 		break;
 	case SDIOD_DRVSTR_KEY(BCM43362_CHIP_ID, 13):
 		str_tab = (sdiod_drive_str_t *)&sdiod_drive_strength_tab5_1v8;
 		str_mask = 0x00003800;
 		str_shift = 11;
 		break;
 	case SDIOD_DRVSTR_KEY(BCM4334_CHIP_ID, 17):
 		str_tab = (sdiod_drive_str_t *)&sdiod_drive_strength_tab6_1v8;
 		str_mask = 0x00001800;
 		str_shift = 11;
 		break;
 	case SDIOD_DRVSTR_KEY(BCM43143_CHIP_ID, 17):
 #if !defined(BCM_SDIO_VDDIO) || BCM_SDIO_VDDIO == 33
 		if (drivestrength >=  ARRAYLAST(sdiod_drive_strength_tab7_3v3)->strength) {
 			str_tab = (sdiod_drive_str_t *)&sdiod_drive_strength_tab7_3v3;
 		}
 #else
 		if (drivestrength >=  ARRAYLAST(sdiod_drive_strength_tab7_1v8)->strength) {
 			str_tab = (sdiod_drive_str_t *)&sdiod_drive_strength_tab7_1v8;
 		}
 #endif /* BCM_SDIO_VDDIO */
 		str_mask = 0x00000007;
 		str_ovr_pmuval = PMU43143_CC0_SDIO_DRSTR_OVR;
 		break;
 	default:
 		PMU_MSG(("No SDIO Drive strength init done for chip %s rev %d pmurev %d\n",
 		         bcm_chipname(sih->chip, chn, 8), sih->chiprev, sih->pmurev));
 		break;
 	}

 	if (str_tab != NULL && cc != NULL) {
 		uint32 cc_data_temp;
 		int i;

 		/* Pick the lowest available drive strength equal or greater than the
 		 * requested strength.	Drive strength of 0 requests tri-state.
 		 */
 		for (i = 0; drivestrength < str_tab[i].strength; i++)
 			;

 		if (i > 0 && drivestrength > str_tab[i].strength)
 			i--;

 		W_REG(osh, &cc->chipcontrol_addr, PMU_CHIPCTL1);
 		cc_data_temp = R_REG(osh, &cc->chipcontrol_data);
 		cc_data_temp &= ~str_mask;
 		cc_data_temp |= str_tab[i].sel << str_shift;
 		W_REG(osh, &cc->chipcontrol_data, cc_data_temp);
 		if (str_ovr_pmuval) { /* enables the selected drive strength */
 			W_REG(osh,  &cc->chipcontrol_addr, str_ovr_pmuctl);
 			OR_REG(osh, &cc->chipcontrol_data, str_ovr_pmuval);
 		}
 		PMU_MSG(("SDIO: %dmA drive strength requested; set to %dmA\n",
 		         drivestrength, str_tab[i].strength));
 	}

 	/* Return to original core */
 	si_restore_core(sih, origidx, intr_val);
 } /* si_sdiod_drive_strength_init */
	/*
	* Misc utility routines for accessing PMU corerev specific features
	* of the SiliconBackplane-based Broadcom chips.
	*
	* Copyright (C) 1999-2016, Broadcom Corporation
	*
	* Unless you and Broadcom execute a separate written software license
	* agreement governing use of this software, this software is licensed to you
	* under the terms of the GNU General Public License version 2 (the "GPL"),
	* available at http://www.broadcom.com/licenses/GPLv2.php, with the
	* following added to such license:
	*
	* As a special exception, the copyright holders of this software give you
	* permission to link this software with independent modules, and to copy and
	* distribute the resulting executable under terms of your choice, provided that
	* you also meet, for each linked independent module, the terms and conditions of
	* the license of that module. An independent module is a module which is not
	* derived from this software. The special exception does not apply to any
	* modifications of the software.
	*
	* Notwithstanding the above, under no circumstances may you combine this
	* software in any way with any other Broadcom software provided under a license
	* other than the GPL, without Broadcom's express prior written consent.
	*
	* $Id: hndpmu.c 530682 2015-01-30 18:48:21Z $
	*/


	/*
	* Note: this file contains PLL/FLL related functions. A chip can contain multiple PLLs/FLLs.
	* However, in the context of this file the baseband ('BB') PLL/FLL is referred to.
	*
	* Throughout this code, the prefixes 'pmu0_', 'pmu1_' and 'pmu2_' are used.
	* They refer to different revisions of the PMU (which is at revision 18 @ Apr 25, 2012)
	* pmu1_ marks the transition from PLL to ADFLL (Digital Frequency Locked Loop). It supports
	* fractional frequency generation. pmu2_ does not support fractional frequency generation.
	*/

	#include <bcm_cfg.h>
	#include <typedefs.h>
	#include <bcmdefs.h>
	#include <osl.h>
	#include <bcmutils.h>
	#include <siutils.h>
	#include <bcmdevs.h>
	#include <hndsoc.h>
	#include <sbchipc.h>
	#include <hndpmu.h>

	#define PMU_ERROR(args)

	#define PMU_MSG(args)

	/* To check in verbose debugging messages not intended
	* to be on except on private builds.
	*/
	#define PMU_NONE(args)

	/** contains resource bit positions for a specific chip */
	struct rsc_per_chip_s {
	uint8 ht_avail;
	uint8 macphy_clkavail;
	uint8 ht_start;
	uint8 otp_pu;
	};

	typedef struct rsc_per_chip_s rsc_per_chip_t;


	/* SDIO Pad drive strength to select value mappings.
	* The last strength value in each table must be 0 (the tri-state value).
	*/
	typedef struct {
	uint8 strength; /* Pad Drive Strength in mA */
	uint8 sel; /* Chip-specific select value */
	} sdiod_drive_str_t;

	/* SDIO Drive Strength to sel value table for PMU Rev 1 */
	static const sdiod_drive_str_t sdiod_drive_strength_tab1[] = {
	{4, 0x2},
	{2, 0x3},
	{1, 0x0},
	{0, 0x0} };

	/* SDIO Drive Strength to sel value table for PMU Rev 2, 3 */
	static const sdiod_drive_str_t sdiod_drive_strength_tab2[] = {
	{12, 0x7},
	{10, 0x6},
	{8, 0x5},
	{6, 0x4},
	{4, 0x2},
	{2, 0x1},
	{0, 0x0} };

	/* SDIO Drive Strength to sel value table for PMU Rev 8 (1.8V) */
	static const sdiod_drive_str_t sdiod_drive_strength_tab3[] = {
	{32, 0x7},
	{26, 0x6},
	{22, 0x5},
	{16, 0x4},
	{12, 0x3},
	{8, 0x2},
	{4, 0x1},
	{0, 0x0} };

	/* SDIO Drive Strength to sel value table for PMU Rev 11 (1.8v) */
	static const sdiod_drive_str_t sdiod_drive_strength_tab4_1v8[] = {
	{32, 0x6},
	{26, 0x7},
	{22, 0x4},
	{16, 0x5},
	{12, 0x2},
	{8, 0x3},
	{4, 0x0},
	{0, 0x1} };

	/* SDIO Drive Strength to sel value table for PMU Rev 11 (1.2v) */

	/* SDIO Drive Strength to sel value table for PMU Rev 11 (2.5v) */

	/* SDIO Drive Strength to sel value table for PMU Rev 13 (1.8v) */
	static const sdiod_drive_str_t sdiod_drive_strength_tab5_1v8[] = {
	{6, 0x7},
	{5, 0x6},
	{4, 0x5},
	{3, 0x4},
	{2, 0x2},
	{1, 0x1},
	{0, 0x0} };

	/* SDIO Drive Strength to sel value table for PMU Rev 13 (3.3v) */

	/** SDIO Drive Strength to sel value table for PMU Rev 17 (1.8v) */
	static const sdiod_drive_str_t sdiod_drive_strength_tab6_1v8[] = {
	{3, 0x3},
	{2, 0x2},
	{1, 0x1},
	{0, 0x0} };


	/**
	* SDIO Drive Strength to sel value table for 43143 PMU Rev 17, see Confluence 43143 Toplevel
	* architecture page, section 'PMU Chip Control 1 Register definition', click link to picture
	* BCM43143_sel_sdio_signals.jpg. Valid after PMU Chip Control 0 Register, bit31 (override) has
	* been written '1'.
	*/
	#if !defined(BCM_SDIO_VDDIO) \|\| BCM_SDIO_VDDIO == 33

	static const sdiod_drive_str_t sdiod_drive_strength_tab7_3v3[] = {
	/* note: for 14, 10, 6 and 2mA hw timing is not met according to rtl team */
	{16, 0x7},
	{12, 0x5},
	{8, 0x3},
	{4, 0x1} }; /* note: 43143 does not support tristate */

	#else

	static const sdiod_drive_str_t sdiod_drive_strength_tab7_1v8[] = {
	/* note: for 7, 5, 3 and 1mA hw timing is not met according to rtl team */
	{8, 0x7},
	{6, 0x5},
	{4, 0x3},
	{2, 0x1} }; /* note: 43143 does not support tristate */

	#endif /* BCM_SDIO_VDDIO */

	#define SDIOD_DRVSTR_KEY(chip, pmu) (((chip) << 16) \| (pmu))

	/**
	* Balance between stable SDIO operation and power consumption is achieved using this function.
	* Note that each drive strength table is for a specific VDDIO of the SDIO pads, ideally this
	* function should read the VDDIO itself to select the correct table. For now it has been solved
	* with the 'BCM_SDIO_VDDIO' preprocessor constant.
	*
	* 'drivestrength': desired pad drive strength in mA. Drive strength of 0 requests tri-state (if
	* hardware supports this), if no hw support drive strength is not programmed.
	*/
	void
	si_sdiod_drive_strength_init(si_t sih, osl_t osh, uint32 drivestrength)
	{
	chipcregs_t *cc;
	uint origidx, intr_val = 0;
	sdiod_drive_str_t *str_tab = NULL;
	uint32 str_mask = 0; /* only alter desired bits in PMU chipcontrol 1 register */
	uint32 str_shift = 0;
	uint32 str_ovr_pmuctl = PMU_CHIPCTL0; /* PMU chipcontrol register containing override bit */
	uint32 str_ovr_pmuval = 0; /* position of bit within this register */

	if (!(sih->cccaps & CC_CAP_PMU)) {
	return;
	}

	/* Remember original core before switch to chipc */
	cc = (chipcregs_t *) si_switch_core(sih, CC_CORE_ID, &origidx, &intr_val);

	switch (SDIOD_DRVSTR_KEY(sih->chip, sih->pmurev)) {
	case SDIOD_DRVSTR_KEY(BCM4325_CHIP_ID, 1):
	str_tab = (sdiod_drive_str_t *)&sdiod_drive_strength_tab1;
	str_mask = 0x30000000;
	str_shift = 28;
	break;
	case SDIOD_DRVSTR_KEY(BCM4325_CHIP_ID, 2):
	case SDIOD_DRVSTR_KEY(BCM4325_CHIP_ID, 3):
	case SDIOD_DRVSTR_KEY(BCM4315_CHIP_ID, 4):
	str_tab = (sdiod_drive_str_t *)&sdiod_drive_strength_tab2;
	str_mask = 0x00003800;
	str_shift = 11;
	break;
	case SDIOD_DRVSTR_KEY(BCM4336_CHIP_ID, 8):
	case SDIOD_DRVSTR_KEY(BCM4336_CHIP_ID, 11):
	if (sih->pmurev == 8) {
	str_tab = (sdiod_drive_str_t *)&sdiod_drive_strength_tab3;
	}
	else if (sih->pmurev == 11) {
	str_tab = (sdiod_drive_str_t *)&sdiod_drive_strength_tab4_1v8;
	}
	str_mask = 0x00003800;
	str_shift = 11;
	break;
	case SDIOD_DRVSTR_KEY(BCM4330_CHIP_ID, 12):
	str_tab = (sdiod_drive_str_t *)&sdiod_drive_strength_tab4_1v8;
	str_mask = 0x00003800;
	str_shift = 11;
	break;
	case SDIOD_DRVSTR_KEY(BCM43362_CHIP_ID, 13):
	str_tab = (sdiod_drive_str_t *)&sdiod_drive_strength_tab5_1v8;
	str_mask = 0x00003800;
	str_shift = 11;
	break;
	case SDIOD_DRVSTR_KEY(BCM4334_CHIP_ID, 17):
	str_tab = (sdiod_drive_str_t *)&sdiod_drive_strength_tab6_1v8;
	str_mask = 0x00001800;
	str_shift = 11;
	break;
	case SDIOD_DRVSTR_KEY(BCM43143_CHIP_ID, 17):
	#if !defined(BCM_SDIO_VDDIO) \|\| BCM_SDIO_VDDIO == 33
	if (drivestrength >= ARRAYLAST(sdiod_drive_strength_tab7_3v3)->strength) {
	str_tab = (sdiod_drive_str_t *)&sdiod_drive_strength_tab7_3v3;
	}
	#else
	if (drivestrength >= ARRAYLAST(sdiod_drive_strength_tab7_1v8)->strength) {
	str_tab = (sdiod_drive_str_t *)&sdiod_drive_strength_tab7_1v8;
	}
	#endif /* BCM_SDIO_VDDIO */
	str_mask = 0x00000007;
	str_ovr_pmuval = PMU43143_CC0_SDIO_DRSTR_OVR;
	break;
	default:
	PMU_MSG(("No SDIO Drive strength init done for chip %s rev %d pmurev %d\n",
	bcm_chipname(sih->chip, chn, 8), sih->chiprev, sih->pmurev));
	break;
	}

	if (str_tab != NULL && cc != NULL) {
	uint32 cc_data_temp;
	int i;

	/* Pick the lowest available drive strength equal or greater than the
	* requested strength. Drive strength of 0 requests tri-state.
	*/
	for (i = 0; drivestrength < str_tab[i].strength; i++)
	;

	if (i > 0 && drivestrength > str_tab[i].strength)
	i--;

	W_REG(osh, &cc->chipcontrol_addr, PMU_CHIPCTL1);
	cc_data_temp = R_REG(osh, &cc->chipcontrol_data);
	cc_data_temp &= ~str_mask;
	cc_data_temp \|= str_tab[i].sel << str_shift;
	W_REG(osh, &cc->chipcontrol_data, cc_data_temp);
	if (str_ovr_pmuval) { /* enables the selected drive strength */
	W_REG(osh, &cc->chipcontrol_addr, str_ovr_pmuctl);
	OR_REG(osh, &cc->chipcontrol_data, str_ovr_pmuval);
	}
	PMU_MSG(("SDIO: %dmA drive strength requested; set to %dmA\n",
	drivestrength, str_tab[i].strength));
	}

	/* Return to original core */
	si_restore_core(sih, origidx, intr_val);
	} /* si_sdiod_drive_strength_init */