drivers/bcma/driver_chipcommon_pmu.c - maze/linux - Git at Google

 /*
  * Broadcom specific AMBA
  * ChipCommon Power Management Unit driver
  *
  * Copyright 2009, Michael Buesch <m@bues.ch>
  * Copyright 2007, Broadcom Corporation
  *
  * Licensed under the GNU/GPL. See COPYING for details.
  */

 #include "bcma_private.h"
 #include <linux/bcma/bcma.h>

 static u32 bcma_chipco_pll_read(struct bcma_drv_cc *cc, u32 offset)
 {
 	bcma_cc_write32(cc, BCMA_CC_PLLCTL_ADDR, offset);
 	bcma_cc_read32(cc, BCMA_CC_PLLCTL_ADDR);
 	return bcma_cc_read32(cc, BCMA_CC_PLLCTL_DATA);
 }

 static void bcma_chipco_chipctl_maskset(struct bcma_drv_cc *cc,
 					u32 offset, u32 mask, u32 set)
 {
 	u32 value;

 	bcma_cc_read32(cc, BCMA_CC_CHIPCTL_ADDR);
 	bcma_cc_write32(cc, BCMA_CC_CHIPCTL_ADDR, offset);
 	bcma_cc_read32(cc, BCMA_CC_CHIPCTL_ADDR);
 	value = bcma_cc_read32(cc, BCMA_CC_CHIPCTL_DATA);
 	value &= mask;
 	value |= set;
 	bcma_cc_write32(cc, BCMA_CC_CHIPCTL_DATA, value);
 	bcma_cc_read32(cc, BCMA_CC_CHIPCTL_DATA);
 }

 static void bcma_pmu_pll_init(struct bcma_drv_cc *cc)
 {
 	struct bcma_bus *bus = cc->core->bus;

 	switch (bus->chipinfo.id) {
 	case 0x4313:
 	case 0x4331:
 	case 43224:
 	case 43225:
 		break;
 	default:
 		pr_err("PLL init unknown for device 0x%04X\n",
 			bus->chipinfo.id);
 	}
 }

 static void bcma_pmu_resources_init(struct bcma_drv_cc *cc)
 {
 	struct bcma_bus *bus = cc->core->bus;
 	u32 min_msk = 0, max_msk = 0;

 	switch (bus->chipinfo.id) {
 	case 0x4313:
 		min_msk = 0x200D;
 		max_msk = 0xFFFF;
 		break;
 	case 43224:
 	case 43225:
 		break;
 	default:
 		pr_err("PMU resource config unknown for device 0x%04X\n",
 			bus->chipinfo.id);
 	}

 	/* Set the resource masks. */
 	if (min_msk)
 		bcma_cc_write32(cc, BCMA_CC_PMU_MINRES_MSK, min_msk);
 	if (max_msk)
 		bcma_cc_write32(cc, BCMA_CC_PMU_MAXRES_MSK, max_msk);
 }

 void bcma_pmu_swreg_init(struct bcma_drv_cc *cc)
 {
 	struct bcma_bus *bus = cc->core->bus;

 	switch (bus->chipinfo.id) {
 	case 0x4313:
 	case 0x4331:
 	case 43224:
 	case 43225:
 		break;
 	default:
 		pr_err("PMU switch/regulators init unknown for device "
 			"0x%04X\n", bus->chipinfo.id);
 	}
 }

 /* Disable to allow reading SPROM. Don't know the adventages of enabling it. */
 void bcma_chipco_bcm4331_ext_pa_lines_ctl(struct bcma_drv_cc *cc, bool enable)
 {
 	struct bcma_bus *bus = cc->core->bus;
 	u32 val;

 	val = bcma_cc_read32(cc, BCMA_CC_CHIPCTL);
 	if (enable) {
 		val |= BCMA_CHIPCTL_4331_EXTPA_EN;
 		if (bus->chipinfo.pkg == 9 || bus->chipinfo.pkg == 11)
 			val |= BCMA_CHIPCTL_4331_EXTPA_ON_GPIO2_5;
 	} else {
 		val &= ~BCMA_CHIPCTL_4331_EXTPA_EN;
 		val &= ~BCMA_CHIPCTL_4331_EXTPA_ON_GPIO2_5;
 	}
 	bcma_cc_write32(cc, BCMA_CC_CHIPCTL, val);
 }

 void bcma_pmu_workarounds(struct bcma_drv_cc *cc)
 {
 	struct bcma_bus *bus = cc->core->bus;

 	switch (bus->chipinfo.id) {
 	case 0x4313:
 		bcma_chipco_chipctl_maskset(cc, 0, ~0, 0x7);
 		break;
 	case 0x4331:
 		/* BCM4331 workaround is SPROM-related, we put it in sprom.c */
 		break;
 	case 43224:
 		if (bus->chipinfo.rev == 0) {
 			pr_err("Workarounds for 43224 rev 0 not fully "
 				"implemented\n");
 			bcma_chipco_chipctl_maskset(cc, 0, ~0, 0x00F000F0);
 		} else {
 			bcma_chipco_chipctl_maskset(cc, 0, ~0, 0xF0);
 		}
 		break;
 	case 43225:
 		break;
 	default:
 		pr_err("Workarounds unknown for device 0x%04X\n",
 			bus->chipinfo.id);
 	}
 }

 void bcma_pmu_init(struct bcma_drv_cc *cc)
 {
 	u32 pmucap;

 	pmucap = bcma_cc_read32(cc, BCMA_CC_PMU_CAP);
 	cc->pmu.rev = (pmucap & BCMA_CC_PMU_CAP_REVISION);

 	pr_debug("Found rev %u PMU (capabilities 0x%08X)\n", cc->pmu.rev,
 		 pmucap);

 	if (cc->pmu.rev == 1)
 		bcma_cc_mask32(cc, BCMA_CC_PMU_CTL,
 			      ~BCMA_CC_PMU_CTL_NOILPONW);
 	else
 		bcma_cc_set32(cc, BCMA_CC_PMU_CTL,
 			     BCMA_CC_PMU_CTL_NOILPONW);

 	if (cc->core->id.id == 0x4329 && cc->core->id.rev == 2)
 		pr_err("Fix for 4329b0 bad LPOM state not implemented!\n");

 	bcma_pmu_pll_init(cc);
 	bcma_pmu_resources_init(cc);
 	bcma_pmu_swreg_init(cc);
 	bcma_pmu_workarounds(cc);
 }

 u32 bcma_pmu_alp_clock(struct bcma_drv_cc *cc)
 {
 	struct bcma_bus *bus = cc->core->bus;

 	switch (bus->chipinfo.id) {
 	case 0x4716:
 	case 0x4748:
 	case 47162:
 	case 0x4313:
 	case 0x5357:
 	case 0x4749:
 	case 53572:
 		/* always 20Mhz */
 		return 20000 * 1000;
 	case 0x5356:
 	case 0x5300:
 		/* always 25Mhz */
 		return 25000 * 1000;
 	default:
 		pr_warn("No ALP clock specified for %04X device, "
 			"pmu rev. %d, using default %d Hz\n",
 			bus->chipinfo.id, cc->pmu.rev, BCMA_CC_PMU_ALP_CLOCK);
 	}
 	return BCMA_CC_PMU_ALP_CLOCK;
 }

 /* Find the output of the "m" pll divider given pll controls that start with
  * pllreg "pll0" i.e. 12 for main 6 for phy, 0 for misc.
  */
 static u32 bcma_pmu_clock(struct bcma_drv_cc *cc, u32 pll0, u32 m)
 {
 	u32 tmp, div, ndiv, p1, p2, fc;
 	struct bcma_bus *bus = cc->core->bus;

 	BUG_ON((pll0 & 3) || (pll0 > BCMA_CC_PMU4716_MAINPLL_PLL0));

 	BUG_ON(!m || m > 4);

 	if (bus->chipinfo.id == 0x5357 || bus->chipinfo.id == 0x4749) {
 		/* Detect failure in clock setting */
 		tmp = bcma_cc_read32(cc, BCMA_CC_CHIPSTAT);
 		if (tmp & 0x40000)
 			return 133 * 1000000;
 	}

 	tmp = bcma_chipco_pll_read(cc, pll0 + BCMA_CC_PPL_P1P2_OFF);
 	p1 = (tmp & BCMA_CC_PPL_P1_MASK) >> BCMA_CC_PPL_P1_SHIFT;
 	p2 = (tmp & BCMA_CC_PPL_P2_MASK) >> BCMA_CC_PPL_P2_SHIFT;

 	tmp = bcma_chipco_pll_read(cc, pll0 + BCMA_CC_PPL_M14_OFF);
 	div = (tmp >> ((m - 1) * BCMA_CC_PPL_MDIV_WIDTH)) &
 		BCMA_CC_PPL_MDIV_MASK;

 	tmp = bcma_chipco_pll_read(cc, pll0 + BCMA_CC_PPL_NM5_OFF);
 	ndiv = (tmp & BCMA_CC_PPL_NDIV_MASK) >> BCMA_CC_PPL_NDIV_SHIFT;

 	/* Do calculation in Mhz */
 	fc = bcma_pmu_alp_clock(cc) / 1000000;
 	fc = (p1 * ndiv * fc) / p2;

 	/* Return clock in Hertz */
 	return (fc / div) * 1000000;
 }

 /* query bus clock frequency for PMU-enabled chipcommon */
 u32 bcma_pmu_get_clockcontrol(struct bcma_drv_cc *cc)
 {
 	struct bcma_bus *bus = cc->core->bus;

 	switch (bus->chipinfo.id) {
 	case 0x4716:
 	case 0x4748:
 	case 47162:
 		return bcma_pmu_clock(cc, BCMA_CC_PMU4716_MAINPLL_PLL0,
 				      BCMA_CC_PMU5_MAINPLL_SSB);
 	case 0x5356:
 		return bcma_pmu_clock(cc, BCMA_CC_PMU5356_MAINPLL_PLL0,
 				      BCMA_CC_PMU5_MAINPLL_SSB);
 	case 0x5357:
 	case 0x4749:
 		return bcma_pmu_clock(cc, BCMA_CC_PMU5357_MAINPLL_PLL0,
 				      BCMA_CC_PMU5_MAINPLL_SSB);
 	case 0x5300:
 		return bcma_pmu_clock(cc, BCMA_CC_PMU4706_MAINPLL_PLL0,
 				      BCMA_CC_PMU5_MAINPLL_SSB);
 	case 53572:
 		return 75000000;
 	default:
 		pr_warn("No backplane clock specified for %04X device, "
 			"pmu rev. %d, using default %d Hz\n",
 			bus->chipinfo.id, cc->pmu.rev, BCMA_CC_PMU_HT_CLOCK);
 	}
 	return BCMA_CC_PMU_HT_CLOCK;
 }

 /* query cpu clock frequency for PMU-enabled chipcommon */
 u32 bcma_pmu_get_clockcpu(struct bcma_drv_cc *cc)
 {
 	struct bcma_bus *bus = cc->core->bus;

 	if (bus->chipinfo.id == 53572)
 		return 300000000;

 	if (cc->pmu.rev >= 5) {
 		u32 pll;
 		switch (bus->chipinfo.id) {
 		case 0x5356:
 			pll = BCMA_CC_PMU5356_MAINPLL_PLL0;
 			break;
 		case 0x5357:
 		case 0x4749:
 			pll = BCMA_CC_PMU5357_MAINPLL_PLL0;
 			break;
 		default:
 			pll = BCMA_CC_PMU4716_MAINPLL_PLL0;
 			break;
 		}

 		/* TODO: if (bus->chipinfo.id == 0x5300)
 		  return si_4706_pmu_clock(sih, osh, cc, PMU4706_MAINPLL_PLL0, PMU5_MAINPLL_CPU); */
 		return bcma_pmu_clock(cc, pll, BCMA_CC_PMU5_MAINPLL_CPU);
 	}

 	return bcma_pmu_get_clockcontrol(cc);
 }
	/*
	* Broadcom specific AMBA
	* ChipCommon Power Management Unit driver
	*
	* Copyright 2009, Michael Buesch <m@bues.ch>
	* Copyright 2007, Broadcom Corporation
	*
	* Licensed under the GNU/GPL. See COPYING for details.
	*/

	#include "bcma_private.h"
	#include <linux/bcma/bcma.h>

	static u32 bcma_chipco_pll_read(struct bcma_drv_cc *cc, u32 offset)
	{
	bcma_cc_write32(cc, BCMA_CC_PLLCTL_ADDR, offset);
	bcma_cc_read32(cc, BCMA_CC_PLLCTL_ADDR);
	return bcma_cc_read32(cc, BCMA_CC_PLLCTL_DATA);
	}

	static void bcma_chipco_chipctl_maskset(struct bcma_drv_cc *cc,
	u32 offset, u32 mask, u32 set)
	{
	u32 value;

	bcma_cc_read32(cc, BCMA_CC_CHIPCTL_ADDR);
	bcma_cc_write32(cc, BCMA_CC_CHIPCTL_ADDR, offset);
	bcma_cc_read32(cc, BCMA_CC_CHIPCTL_ADDR);
	value = bcma_cc_read32(cc, BCMA_CC_CHIPCTL_DATA);
	value &= mask;
	value \|= set;
	bcma_cc_write32(cc, BCMA_CC_CHIPCTL_DATA, value);
	bcma_cc_read32(cc, BCMA_CC_CHIPCTL_DATA);
	}

	static void bcma_pmu_pll_init(struct bcma_drv_cc *cc)
	{
	struct bcma_bus *bus = cc->core->bus;

	switch (bus->chipinfo.id) {
	case 0x4313:
	case 0x4331:
	case 43224:
	case 43225:
	break;
	default:
	pr_err("PLL init unknown for device 0x%04X\n",
	bus->chipinfo.id);
	}
	}

	static void bcma_pmu_resources_init(struct bcma_drv_cc *cc)
	{
	struct bcma_bus *bus = cc->core->bus;
	u32 min_msk = 0, max_msk = 0;

	switch (bus->chipinfo.id) {
	case 0x4313:
	min_msk = 0x200D;
	max_msk = 0xFFFF;
	break;
	case 43224:
	case 43225:
	break;
	default:
	pr_err("PMU resource config unknown for device 0x%04X\n",
	bus->chipinfo.id);
	}

	/* Set the resource masks. */
	if (min_msk)
	bcma_cc_write32(cc, BCMA_CC_PMU_MINRES_MSK, min_msk);
	if (max_msk)
	bcma_cc_write32(cc, BCMA_CC_PMU_MAXRES_MSK, max_msk);
	}

	void bcma_pmu_swreg_init(struct bcma_drv_cc *cc)
	{
	struct bcma_bus *bus = cc->core->bus;

	switch (bus->chipinfo.id) {
	case 0x4313:
	case 0x4331:
	case 43224:
	case 43225:
	break;
	default:
	pr_err("PMU switch/regulators init unknown for device "
	"0x%04X\n", bus->chipinfo.id);
	}
	}

	/* Disable to allow reading SPROM. Don't know the adventages of enabling it. */
	void bcma_chipco_bcm4331_ext_pa_lines_ctl(struct bcma_drv_cc *cc, bool enable)
	{
	struct bcma_bus *bus = cc->core->bus;
	u32 val;

	val = bcma_cc_read32(cc, BCMA_CC_CHIPCTL);
	if (enable) {
	val \|= BCMA_CHIPCTL_4331_EXTPA_EN;
	if (bus->chipinfo.pkg == 9 \|\| bus->chipinfo.pkg == 11)
	val \|= BCMA_CHIPCTL_4331_EXTPA_ON_GPIO2_5;
	} else {
	val &= ~BCMA_CHIPCTL_4331_EXTPA_EN;
	val &= ~BCMA_CHIPCTL_4331_EXTPA_ON_GPIO2_5;
	}
	bcma_cc_write32(cc, BCMA_CC_CHIPCTL, val);
	}

	void bcma_pmu_workarounds(struct bcma_drv_cc *cc)
	{
	struct bcma_bus *bus = cc->core->bus;

	switch (bus->chipinfo.id) {
	case 0x4313:
	bcma_chipco_chipctl_maskset(cc, 0, ~0, 0x7);
	break;
	case 0x4331:
	/* BCM4331 workaround is SPROM-related, we put it in sprom.c */
	break;
	case 43224:
	if (bus->chipinfo.rev == 0) {
	pr_err("Workarounds for 43224 rev 0 not fully "
	"implemented\n");
	bcma_chipco_chipctl_maskset(cc, 0, ~0, 0x00F000F0);
	} else {
	bcma_chipco_chipctl_maskset(cc, 0, ~0, 0xF0);
	}
	break;
	case 43225:
	break;
	default:
	pr_err("Workarounds unknown for device 0x%04X\n",
	bus->chipinfo.id);
	}
	}

	void bcma_pmu_init(struct bcma_drv_cc *cc)
	{
	u32 pmucap;

	pmucap = bcma_cc_read32(cc, BCMA_CC_PMU_CAP);
	cc->pmu.rev = (pmucap & BCMA_CC_PMU_CAP_REVISION);

	pr_debug("Found rev %u PMU (capabilities 0x%08X)\n", cc->pmu.rev,
	pmucap);

	if (cc->pmu.rev == 1)
	bcma_cc_mask32(cc, BCMA_CC_PMU_CTL,
	~BCMA_CC_PMU_CTL_NOILPONW);
	else
	bcma_cc_set32(cc, BCMA_CC_PMU_CTL,
	BCMA_CC_PMU_CTL_NOILPONW);

	if (cc->core->id.id == 0x4329 && cc->core->id.rev == 2)
	pr_err("Fix for 4329b0 bad LPOM state not implemented!\n");

	bcma_pmu_pll_init(cc);
	bcma_pmu_resources_init(cc);
	bcma_pmu_swreg_init(cc);
	bcma_pmu_workarounds(cc);
	}

	u32 bcma_pmu_alp_clock(struct bcma_drv_cc *cc)
	{
	struct bcma_bus *bus = cc->core->bus;

	switch (bus->chipinfo.id) {
	case 0x4716:
	case 0x4748:
	case 47162:
	case 0x4313:
	case 0x5357:
	case 0x4749:
	case 53572:
	/* always 20Mhz */
	return 20000 * 1000;
	case 0x5356:
	case 0x5300:
	/* always 25Mhz */
	return 25000 * 1000;
	default:
	pr_warn("No ALP clock specified for %04X device, "
	"pmu rev. %d, using default %d Hz\n",
	bus->chipinfo.id, cc->pmu.rev, BCMA_CC_PMU_ALP_CLOCK);
	}
	return BCMA_CC_PMU_ALP_CLOCK;
	}

	/* Find the output of the "m" pll divider given pll controls that start with
	* pllreg "pll0" i.e. 12 for main 6 for phy, 0 for misc.
	*/
	static u32 bcma_pmu_clock(struct bcma_drv_cc *cc, u32 pll0, u32 m)
	{
	u32 tmp, div, ndiv, p1, p2, fc;
	struct bcma_bus *bus = cc->core->bus;

	BUG_ON((pll0 & 3) \|\| (pll0 > BCMA_CC_PMU4716_MAINPLL_PLL0));

	BUG_ON(!m \|\| m > 4);

	if (bus->chipinfo.id == 0x5357 \|\| bus->chipinfo.id == 0x4749) {
	/* Detect failure in clock setting */
	tmp = bcma_cc_read32(cc, BCMA_CC_CHIPSTAT);
	if (tmp & 0x40000)
	return 133 * 1000000;
	}

	tmp = bcma_chipco_pll_read(cc, pll0 + BCMA_CC_PPL_P1P2_OFF);
	p1 = (tmp & BCMA_CC_PPL_P1_MASK) >> BCMA_CC_PPL_P1_SHIFT;
	p2 = (tmp & BCMA_CC_PPL_P2_MASK) >> BCMA_CC_PPL_P2_SHIFT;

	tmp = bcma_chipco_pll_read(cc, pll0 + BCMA_CC_PPL_M14_OFF);
	div = (tmp >> ((m - 1) * BCMA_CC_PPL_MDIV_WIDTH)) &
	BCMA_CC_PPL_MDIV_MASK;

	tmp = bcma_chipco_pll_read(cc, pll0 + BCMA_CC_PPL_NM5_OFF);
	ndiv = (tmp & BCMA_CC_PPL_NDIV_MASK) >> BCMA_CC_PPL_NDIV_SHIFT;

	/* Do calculation in Mhz */
	fc = bcma_pmu_alp_clock(cc) / 1000000;
	fc = (p1 * ndiv * fc) / p2;

	/* Return clock in Hertz */
	return (fc / div) * 1000000;
	}

	/* query bus clock frequency for PMU-enabled chipcommon */
	u32 bcma_pmu_get_clockcontrol(struct bcma_drv_cc *cc)
	{
	struct bcma_bus *bus = cc->core->bus;

	switch (bus->chipinfo.id) {
	case 0x4716:
	case 0x4748:
	case 47162:
	return bcma_pmu_clock(cc, BCMA_CC_PMU4716_MAINPLL_PLL0,
	BCMA_CC_PMU5_MAINPLL_SSB);
	case 0x5356:
	return bcma_pmu_clock(cc, BCMA_CC_PMU5356_MAINPLL_PLL0,
	BCMA_CC_PMU5_MAINPLL_SSB);
	case 0x5357:
	case 0x4749:
	return bcma_pmu_clock(cc, BCMA_CC_PMU5357_MAINPLL_PLL0,
	BCMA_CC_PMU5_MAINPLL_SSB);
	case 0x5300:
	return bcma_pmu_clock(cc, BCMA_CC_PMU4706_MAINPLL_PLL0,
	BCMA_CC_PMU5_MAINPLL_SSB);
	case 53572:
	return 75000000;
	default:
	pr_warn("No backplane clock specified for %04X device, "
	"pmu rev. %d, using default %d Hz\n",
	bus->chipinfo.id, cc->pmu.rev, BCMA_CC_PMU_HT_CLOCK);
	}
	return BCMA_CC_PMU_HT_CLOCK;
	}

	/* query cpu clock frequency for PMU-enabled chipcommon */
	u32 bcma_pmu_get_clockcpu(struct bcma_drv_cc *cc)
	{
	struct bcma_bus *bus = cc->core->bus;

	if (bus->chipinfo.id == 53572)
	return 300000000;

	if (cc->pmu.rev >= 5) {
	u32 pll;
	switch (bus->chipinfo.id) {
	case 0x5356:
	pll = BCMA_CC_PMU5356_MAINPLL_PLL0;
	break;
	case 0x5357:
	case 0x4749:
	pll = BCMA_CC_PMU5357_MAINPLL_PLL0;
	break;
	default:
	pll = BCMA_CC_PMU4716_MAINPLL_PLL0;
	break;
	}

	/* TODO: if (bus->chipinfo.id == 0x5300)
	return si_4706_pmu_clock(sih, osh, cc, PMU4706_MAINPLL_PLL0, PMU5_MAINPLL_CPU); */
	return bcma_pmu_clock(cc, pll, BCMA_CC_PMU5_MAINPLL_CPU);
	}

	return bcma_pmu_get_clockcontrol(cc);
	}