drivers/ssb/driver_chipcommon_pmu.c - kernel/msm - Gitiles

 /*
  * Sonics Silicon Backplane
  * Broadcom ChipCommon Power Management Unit driver
  *
  * Copyright 2009, Michael Buesch <mb@bu3sch.de>
  * Copyright 2007, Broadcom Corporation
  *
  * Licensed under the GNU/GPL. See COPYING for details.
  */

 #include <linux/ssb/ssb.h>
 #include <linux/ssb/ssb_regs.h>
 #include <linux/ssb/ssb_driver_chipcommon.h>
 #include <linux/delay.h>

 #include "ssb_private.h"

 static u32 ssb_chipco_pll_read(struct ssb_chipcommon *cc, u32 offset)
 {
 	chipco_write32(cc, SSB_CHIPCO_PLLCTL_ADDR, offset);
 	return chipco_read32(cc, SSB_CHIPCO_PLLCTL_DATA);
 }

 static void ssb_chipco_pll_write(struct ssb_chipcommon *cc,
 				 u32 offset, u32 value)
 {
 	chipco_write32(cc, SSB_CHIPCO_PLLCTL_ADDR, offset);
 	chipco_write32(cc, SSB_CHIPCO_PLLCTL_DATA, value);
 }

 static void ssb_chipco_regctl_maskset(struct ssb_chipcommon *cc,
 				   u32 offset, u32 mask, u32 set)
 {
 	u32 value;

 	chipco_read32(cc, SSB_CHIPCO_REGCTL_ADDR);
 	chipco_write32(cc, SSB_CHIPCO_REGCTL_ADDR, offset);
 	chipco_read32(cc, SSB_CHIPCO_REGCTL_ADDR);
 	value = chipco_read32(cc, SSB_CHIPCO_REGCTL_DATA);
 	value &= mask;
 	value |= set;
 	chipco_write32(cc, SSB_CHIPCO_REGCTL_DATA, value);
 	chipco_read32(cc, SSB_CHIPCO_REGCTL_DATA);
 }

 struct pmu0_plltab_entry {
 	u16 freq;	/* Crystal frequency in kHz.*/
 	u8 xf;		/* Crystal frequency value for PMU control */
 	u8 wb_int;
 	u32 wb_frac;
 };

 static const struct pmu0_plltab_entry pmu0_plltab[] = {
 	{ .freq = 12000, .xf =  1, .wb_int = 73, .wb_frac = 349525, },
 	{ .freq = 13000, .xf =  2, .wb_int = 67, .wb_frac = 725937, },
 	{ .freq = 14400, .xf =  3, .wb_int = 61, .wb_frac = 116508, },
 	{ .freq = 15360, .xf =  4, .wb_int = 57, .wb_frac = 305834, },
 	{ .freq = 16200, .xf =  5, .wb_int = 54, .wb_frac = 336579, },
 	{ .freq = 16800, .xf =  6, .wb_int = 52, .wb_frac = 399457, },
 	{ .freq = 19200, .xf =  7, .wb_int = 45, .wb_frac = 873813, },
 	{ .freq = 19800, .xf =  8, .wb_int = 44, .wb_frac = 466033, },
 	{ .freq = 20000, .xf =  9, .wb_int = 44, .wb_frac = 0,      },
 	{ .freq = 25000, .xf = 10, .wb_int = 70, .wb_frac = 419430, },
 	{ .freq = 26000, .xf = 11, .wb_int = 67, .wb_frac = 725937, },
 	{ .freq = 30000, .xf = 12, .wb_int = 58, .wb_frac = 699050, },
 	{ .freq = 38400, .xf = 13, .wb_int = 45, .wb_frac = 873813, },
 	{ .freq = 40000, .xf = 14, .wb_int = 45, .wb_frac = 0,      },
 };
 #define SSB_PMU0_DEFAULT_XTALFREQ	20000

 static const struct pmu0_plltab_entry * pmu0_plltab_find_entry(u32 crystalfreq)
 {
 	const struct pmu0_plltab_entry *e;
 	unsigned int i;

 	for (i = 0; i < ARRAY_SIZE(pmu0_plltab); i++) {
 		e = &pmu0_plltab[i];
 		if (e->freq == crystalfreq)
 			return e;
 	}

 	return NULL;
 }

 /* Tune the PLL to the crystal speed. crystalfreq is in kHz. */
 static void ssb_pmu0_pllinit_r0(struct ssb_chipcommon *cc,
 				u32 crystalfreq)
 {
 	struct ssb_bus *bus = cc->dev->bus;
 	const struct pmu0_plltab_entry *e = NULL;
 	u32 pmuctl, tmp, pllctl;
 	unsigned int i;

 	if ((bus->chip_id == 0x5354) && !crystalfreq) {
 		/* The 5354 crystal freq is 25MHz */
 		crystalfreq = 25000;
 	}
 	if (crystalfreq)
 		e = pmu0_plltab_find_entry(crystalfreq);
 	if (!e)
 		e = pmu0_plltab_find_entry(SSB_PMU0_DEFAULT_XTALFREQ);
 	BUG_ON(!e);
 	crystalfreq = e->freq;
 	cc->pmu.crystalfreq = e->freq;

 	/* Check if the PLL already is programmed to this frequency. */
 	pmuctl = chipco_read32(cc, SSB_CHIPCO_PMU_CTL);
 	if (((pmuctl & SSB_CHIPCO_PMU_CTL_XTALFREQ) >> SSB_CHIPCO_PMU_CTL_XTALFREQ_SHIFT) == e->xf) {
 		/* We're already there... */
 		return;
 	}

 	ssb_printk(KERN_INFO PFX "Programming PLL to %u.%03u MHz\n",
 		   (crystalfreq / 1000), (crystalfreq % 1000));

 	/* First turn the PLL off. */
 	switch (bus->chip_id) {
 	case 0x4328:
 		chipco_mask32(cc, SSB_CHIPCO_PMU_MINRES_MSK,
 			      ~(1 << SSB_PMURES_4328_BB_PLL_PU));
 		chipco_mask32(cc, SSB_CHIPCO_PMU_MAXRES_MSK,
 			      ~(1 << SSB_PMURES_4328_BB_PLL_PU));
 		break;
 	case 0x5354:
 		chipco_mask32(cc, SSB_CHIPCO_PMU_MINRES_MSK,
 			      ~(1 << SSB_PMURES_5354_BB_PLL_PU));
 		chipco_mask32(cc, SSB_CHIPCO_PMU_MAXRES_MSK,
 			      ~(1 << SSB_PMURES_5354_BB_PLL_PU));
 		break;
 	default:
 		SSB_WARN_ON(1);
 	}
 	for (i = 1500; i; i--) {
 		tmp = chipco_read32(cc, SSB_CHIPCO_CLKCTLST);
 		if (!(tmp & SSB_CHIPCO_CLKCTLST_HAVEHT))
 			break;
 		udelay(10);
 	}
 	tmp = chipco_read32(cc, SSB_CHIPCO_CLKCTLST);
 	if (tmp & SSB_CHIPCO_CLKCTLST_HAVEHT)
 		ssb_printk(KERN_EMERG PFX "Failed to turn the PLL off!\n");

 	/* Set PDIV in PLL control 0. */
 	pllctl = ssb_chipco_pll_read(cc, SSB_PMU0_PLLCTL0);
 	if (crystalfreq >= SSB_PMU0_PLLCTL0_PDIV_FREQ)
 		pllctl |= SSB_PMU0_PLLCTL0_PDIV_MSK;
 	else
 		pllctl &= ~SSB_PMU0_PLLCTL0_PDIV_MSK;
 	ssb_chipco_pll_write(cc, SSB_PMU0_PLLCTL0, pllctl);

 	/* Set WILD in PLL control 1. */
 	pllctl = ssb_chipco_pll_read(cc, SSB_PMU0_PLLCTL1);
 	pllctl &= ~SSB_PMU0_PLLCTL1_STOPMOD;
 	pllctl &= ~(SSB_PMU0_PLLCTL1_WILD_IMSK | SSB_PMU0_PLLCTL1_WILD_FMSK);
 	pllctl |= ((u32)e->wb_int << SSB_PMU0_PLLCTL1_WILD_IMSK_SHIFT) & SSB_PMU0_PLLCTL1_WILD_IMSK;
 	pllctl |= ((u32)e->wb_frac << SSB_PMU0_PLLCTL1_WILD_FMSK_SHIFT) & SSB_PMU0_PLLCTL1_WILD_FMSK;
 	if (e->wb_frac == 0)
 		pllctl |= SSB_PMU0_PLLCTL1_STOPMOD;
 	ssb_chipco_pll_write(cc, SSB_PMU0_PLLCTL1, pllctl);

 	/* Set WILD in PLL control 2. */
 	pllctl = ssb_chipco_pll_read(cc, SSB_PMU0_PLLCTL2);
 	pllctl &= ~SSB_PMU0_PLLCTL2_WILD_IMSKHI;
 	pllctl |= (((u32)e->wb_int >> 4) << SSB_PMU0_PLLCTL2_WILD_IMSKHI_SHIFT) & SSB_PMU0_PLLCTL2_WILD_IMSKHI;
 	ssb_chipco_pll_write(cc, SSB_PMU0_PLLCTL2, pllctl);

 	/* Set the crystalfrequency and the divisor. */
 	pmuctl = chipco_read32(cc, SSB_CHIPCO_PMU_CTL);
 	pmuctl &= ~SSB_CHIPCO_PMU_CTL_ILP_DIV;
 	pmuctl |= (((crystalfreq + 127) / 128 - 1) << SSB_CHIPCO_PMU_CTL_ILP_DIV_SHIFT)
 			& SSB_CHIPCO_PMU_CTL_ILP_DIV;
 	pmuctl &= ~SSB_CHIPCO_PMU_CTL_XTALFREQ;
 	pmuctl |= ((u32)e->xf << SSB_CHIPCO_PMU_CTL_XTALFREQ_SHIFT) & SSB_CHIPCO_PMU_CTL_XTALFREQ;
 	chipco_write32(cc, SSB_CHIPCO_PMU_CTL, pmuctl);
 }

 struct pmu1_plltab_entry {
 	u16 freq;	/* Crystal frequency in kHz.*/
 	u8 xf;		/* Crystal frequency value for PMU control */
 	u8 ndiv_int;
 	u32 ndiv_frac;
 	u8 p1div;
 	u8 p2div;
 };

 static const struct pmu1_plltab_entry pmu1_plltab[] = {
 	{ .freq = 12000, .xf =  1, .p1div = 3, .p2div = 22, .ndiv_int =  0x9, .ndiv_frac = 0xFFFFEF, },
 	{ .freq = 13000, .xf =  2, .p1div = 1, .p2div =  6, .ndiv_int =  0xb, .ndiv_frac = 0x483483, },
 	{ .freq = 14400, .xf =  3, .p1div = 1, .p2div = 10, .ndiv_int =  0xa, .ndiv_frac = 0x1C71C7, },
 	{ .freq = 15360, .xf =  4, .p1div = 1, .p2div =  5, .ndiv_int =  0xb, .ndiv_frac = 0x755555, },
 	{ .freq = 16200, .xf =  5, .p1div = 1, .p2div = 10, .ndiv_int =  0x5, .ndiv_frac = 0x6E9E06, },
 	{ .freq = 16800, .xf =  6, .p1div = 1, .p2div = 10, .ndiv_int =  0x5, .ndiv_frac = 0x3CF3CF, },
 	{ .freq = 19200, .xf =  7, .p1div = 1, .p2div =  9, .ndiv_int =  0x5, .ndiv_frac = 0x17B425, },
 	{ .freq = 19800, .xf =  8, .p1div = 1, .p2div = 11, .ndiv_int =  0x4, .ndiv_frac = 0xA57EB,  },
 	{ .freq = 20000, .xf =  9, .p1div = 1, .p2div = 11, .ndiv_int =  0x4, .ndiv_frac = 0,        },
 	{ .freq = 24000, .xf = 10, .p1div = 3, .p2div = 11, .ndiv_int =  0xa, .ndiv_frac = 0,        },
 	{ .freq = 25000, .xf = 11, .p1div = 5, .p2div = 16, .ndiv_int =  0xb, .ndiv_frac = 0,        },
 	{ .freq = 26000, .xf = 12, .p1div = 1, .p2div =  2, .ndiv_int = 0x10, .ndiv_frac = 0xEC4EC4, },
 	{ .freq = 30000, .xf = 13, .p1div = 3, .p2div =  8, .ndiv_int =  0xb, .ndiv_frac = 0,        },
 	{ .freq = 38400, .xf = 14, .p1div = 1, .p2div =  5, .ndiv_int =  0x4, .ndiv_frac = 0x955555, },
 	{ .freq = 40000, .xf = 15, .p1div = 1, .p2div =  2, .ndiv_int =  0xb, .ndiv_frac = 0,        },
 };

 #define SSB_PMU1_DEFAULT_XTALFREQ	15360

 static const struct pmu1_plltab_entry * pmu1_plltab_find_entry(u32 crystalfreq)
 {
 	const struct pmu1_plltab_entry *e;
 	unsigned int i;

 	for (i = 0; i < ARRAY_SIZE(pmu1_plltab); i++) {
 		e = &pmu1_plltab[i];
 		if (e->freq == crystalfreq)
 			return e;
 	}

 	return NULL;
 }

 /* Tune the PLL to the crystal speed. crystalfreq is in kHz. */
 static void ssb_pmu1_pllinit_r0(struct ssb_chipcommon *cc,
 				u32 crystalfreq)
 {
 	struct ssb_bus *bus = cc->dev->bus;
 	const struct pmu1_plltab_entry *e = NULL;
 	u32 buffer_strength = 0;
 	u32 tmp, pllctl, pmuctl;
 	unsigned int i;

 	if (bus->chip_id == 0x4312) {
 		/* We do not touch the BCM4312 PLL and assume
 		 * the default crystal settings work out-of-the-box. */
 		cc->pmu.crystalfreq = 20000;
 		return;
 	}

 	if (crystalfreq)
 		e = pmu1_plltab_find_entry(crystalfreq);
 	if (!e)
 		e = pmu1_plltab_find_entry(SSB_PMU1_DEFAULT_XTALFREQ);
 	BUG_ON(!e);
 	crystalfreq = e->freq;
 	cc->pmu.crystalfreq = e->freq;

 	/* Check if the PLL already is programmed to this frequency. */
 	pmuctl = chipco_read32(cc, SSB_CHIPCO_PMU_CTL);
 	if (((pmuctl & SSB_CHIPCO_PMU_CTL_XTALFREQ) >> SSB_CHIPCO_PMU_CTL_XTALFREQ_SHIFT) == e->xf) {
 		/* We're already there... */
 		return;
 	}

 	ssb_printk(KERN_INFO PFX "Programming PLL to %u.%03u MHz\n",
 		   (crystalfreq / 1000), (crystalfreq % 1000));

 	/* First turn the PLL off. */
 	switch (bus->chip_id) {
 	case 0x4325:
 		chipco_mask32(cc, SSB_CHIPCO_PMU_MINRES_MSK,
 			      ~((1 << SSB_PMURES_4325_BBPLL_PWRSW_PU) |
 				(1 << SSB_PMURES_4325_HT_AVAIL)));
 		chipco_mask32(cc, SSB_CHIPCO_PMU_MAXRES_MSK,
 			      ~((1 << SSB_PMURES_4325_BBPLL_PWRSW_PU) |
 				(1 << SSB_PMURES_4325_HT_AVAIL)));
 		/* Adjust the BBPLL to 2 on all channels later. */
 		buffer_strength = 0x222222;
 		break;
 	default:
 		SSB_WARN_ON(1);
 	}
 	for (i = 1500; i; i--) {
 		tmp = chipco_read32(cc, SSB_CHIPCO_CLKCTLST);
 		if (!(tmp & SSB_CHIPCO_CLKCTLST_HAVEHT))
 			break;
 		udelay(10);
 	}
 	tmp = chipco_read32(cc, SSB_CHIPCO_CLKCTLST);
 	if (tmp & SSB_CHIPCO_CLKCTLST_HAVEHT)
 		ssb_printk(KERN_EMERG PFX "Failed to turn the PLL off!\n");

 	/* Set p1div and p2div. */
 	pllctl = ssb_chipco_pll_read(cc, SSB_PMU1_PLLCTL0);
 	pllctl &= ~(SSB_PMU1_PLLCTL0_P1DIV | SSB_PMU1_PLLCTL0_P2DIV);
 	pllctl |= ((u32)e->p1div << SSB_PMU1_PLLCTL0_P1DIV_SHIFT) & SSB_PMU1_PLLCTL0_P1DIV;
 	pllctl |= ((u32)e->p2div << SSB_PMU1_PLLCTL0_P2DIV_SHIFT) & SSB_PMU1_PLLCTL0_P2DIV;
 	ssb_chipco_pll_write(cc, SSB_PMU1_PLLCTL0, pllctl);

 	/* Set ndiv int and ndiv mode */
 	pllctl = ssb_chipco_pll_read(cc, SSB_PMU1_PLLCTL2);
 	pllctl &= ~(SSB_PMU1_PLLCTL2_NDIVINT | SSB_PMU1_PLLCTL2_NDIVMODE);
 	pllctl |= ((u32)e->ndiv_int << SSB_PMU1_PLLCTL2_NDIVINT_SHIFT) & SSB_PMU1_PLLCTL2_NDIVINT;
 	pllctl |= (1 << SSB_PMU1_PLLCTL2_NDIVMODE_SHIFT) & SSB_PMU1_PLLCTL2_NDIVMODE;
 	ssb_chipco_pll_write(cc, SSB_PMU1_PLLCTL2, pllctl);

 	/* Set ndiv frac */
 	pllctl = ssb_chipco_pll_read(cc, SSB_PMU1_PLLCTL3);
 	pllctl &= ~SSB_PMU1_PLLCTL3_NDIVFRAC;
 	pllctl |= ((u32)e->ndiv_frac << SSB_PMU1_PLLCTL3_NDIVFRAC_SHIFT) & SSB_PMU1_PLLCTL3_NDIVFRAC;
 	ssb_chipco_pll_write(cc, SSB_PMU1_PLLCTL3, pllctl);

 	/* Change the drive strength, if required. */
 	if (buffer_strength) {
 		pllctl = ssb_chipco_pll_read(cc, SSB_PMU1_PLLCTL5);
 		pllctl &= ~SSB_PMU1_PLLCTL5_CLKDRV;
 		pllctl |= (buffer_strength << SSB_PMU1_PLLCTL5_CLKDRV_SHIFT) & SSB_PMU1_PLLCTL5_CLKDRV;
 		ssb_chipco_pll_write(cc, SSB_PMU1_PLLCTL5, pllctl);
 	}

 	/* Tune the crystalfreq and the divisor. */
 	pmuctl = chipco_read32(cc, SSB_CHIPCO_PMU_CTL);
 	pmuctl &= ~(SSB_CHIPCO_PMU_CTL_ILP_DIV | SSB_CHIPCO_PMU_CTL_XTALFREQ);
 	pmuctl |= ((((u32)e->freq + 127) / 128 - 1) << SSB_CHIPCO_PMU_CTL_ILP_DIV_SHIFT)
 			& SSB_CHIPCO_PMU_CTL_ILP_DIV;
 	pmuctl |= ((u32)e->xf << SSB_CHIPCO_PMU_CTL_XTALFREQ_SHIFT) & SSB_CHIPCO_PMU_CTL_XTALFREQ;
 	chipco_write32(cc, SSB_CHIPCO_PMU_CTL, pmuctl);
 }

 static void ssb_pmu_pll_init(struct ssb_chipcommon *cc)
 {
 	struct ssb_bus *bus = cc->dev->bus;
 	u32 crystalfreq = 0; /* in kHz. 0 = keep default freq. */

 	if (bus->bustype == SSB_BUSTYPE_SSB) {
 		/* TODO: The user may override the crystal frequency. */
 	}

 	switch (bus->chip_id) {
 	case 0x4312:
 	case 0x4325:
 		ssb_pmu1_pllinit_r0(cc, crystalfreq);
 		break;
 	case 0x4328:
 	case 0x5354:
 		ssb_pmu0_pllinit_r0(cc, crystalfreq);
 		break;
 	case 0x4322:
 		if (cc->pmu.rev == 2) {
 			chipco_write32(cc, SSB_CHIPCO_PLLCTL_ADDR, 0x0000000A);
 			chipco_write32(cc, SSB_CHIPCO_PLLCTL_DATA, 0x380005C0);
 		}
 		break;
 	default:
 		ssb_printk(KERN_ERR PFX
 			   "ERROR: PLL init unknown for device %04X\n",
 			   bus->chip_id);
 	}
 }

 struct pmu_res_updown_tab_entry {
 	u8 resource;	/* The resource number */
 	u16 updown;	/* The updown value */
 };

 enum pmu_res_depend_tab_task {
 	PMU_RES_DEP_SET = 1,
 	PMU_RES_DEP_ADD,
 	PMU_RES_DEP_REMOVE,
 };

 struct pmu_res_depend_tab_entry {
 	u8 resource;	/* The resource number */
 	u8 task;	/* SET | ADD | REMOVE */
 	u32 depend;	/* The depend mask */
 };

 static const struct pmu_res_updown_tab_entry pmu_res_updown_tab_4328a0[] = {
 	{ .resource = SSB_PMURES_4328_EXT_SWITCHER_PWM,		.updown = 0x0101, },
 	{ .resource = SSB_PMURES_4328_BB_SWITCHER_PWM,		.updown = 0x1F01, },
 	{ .resource = SSB_PMURES_4328_BB_SWITCHER_BURST,	.updown = 0x010F, },
 	{ .resource = SSB_PMURES_4328_BB_EXT_SWITCHER_BURST,	.updown = 0x0101, },
 	{ .resource = SSB_PMURES_4328_ILP_REQUEST,		.updown = 0x0202, },
 	{ .resource = SSB_PMURES_4328_RADIO_SWITCHER_PWM,	.updown = 0x0F01, },
 	{ .resource = SSB_PMURES_4328_RADIO_SWITCHER_BURST,	.updown = 0x0F01, },
 	{ .resource = SSB_PMURES_4328_ROM_SWITCH,		.updown = 0x0101, },
 	{ .resource = SSB_PMURES_4328_PA_REF_LDO,		.updown = 0x0F01, },
 	{ .resource = SSB_PMURES_4328_RADIO_LDO,		.updown = 0x0F01, },
 	{ .resource = SSB_PMURES_4328_AFE_LDO,			.updown = 0x0F01, },
 	{ .resource = SSB_PMURES_4328_PLL_LDO,			.updown = 0x0F01, },
 	{ .resource = SSB_PMURES_4328_BG_FILTBYP,		.updown = 0x0101, },
 	{ .resource = SSB_PMURES_4328_TX_FILTBYP,		.updown = 0x0101, },
 	{ .resource = SSB_PMURES_4328_RX_FILTBYP,		.updown = 0x0101, },
 	{ .resource = SSB_PMURES_4328_XTAL_PU,			.updown = 0x0101, },
 	{ .resource = SSB_PMURES_4328_XTAL_EN,			.updown = 0xA001, },
 	{ .resource = SSB_PMURES_4328_BB_PLL_FILTBYP,		.updown = 0x0101, },
 	{ .resource = SSB_PMURES_4328_RF_PLL_FILTBYP,		.updown = 0x0101, },
 	{ .resource = SSB_PMURES_4328_BB_PLL_PU,		.updown = 0x0701, },
 };

 static const struct pmu_res_depend_tab_entry pmu_res_depend_tab_4328a0[] = {
 	{
 		/* Adjust ILP Request to avoid forcing EXT/BB into burst mode. */
 		.resource = SSB_PMURES_4328_ILP_REQUEST,
 		.task = PMU_RES_DEP_SET,
 		.depend = ((1 << SSB_PMURES_4328_EXT_SWITCHER_PWM) |
 			   (1 << SSB_PMURES_4328_BB_SWITCHER_PWM)),
 	},
 };

 static const struct pmu_res_updown_tab_entry pmu_res_updown_tab_4325a0[] = {
 	{ .resource = SSB_PMURES_4325_XTAL_PU,			.updown = 0x1501, },
 };

 static const struct pmu_res_depend_tab_entry pmu_res_depend_tab_4325a0[] = {
 	{
 		/* Adjust HT-Available dependencies. */
 		.resource = SSB_PMURES_4325_HT_AVAIL,
 		.task = PMU_RES_DEP_ADD,
 		.depend = ((1 << SSB_PMURES_4325_RX_PWRSW_PU) |
 			   (1 << SSB_PMURES_4325_TX_PWRSW_PU) |
 			   (1 << SSB_PMURES_4325_LOGEN_PWRSW_PU) |
 			   (1 << SSB_PMURES_4325_AFE_PWRSW_PU)),
 	},
 };

 static void ssb_pmu_resources_init(struct ssb_chipcommon *cc)
 {
 	struct ssb_bus *bus = cc->dev->bus;
 	u32 min_msk = 0, max_msk = 0;
 	unsigned int i;
 	const struct pmu_res_updown_tab_entry *updown_tab = NULL;
 	unsigned int updown_tab_size;
 	const struct pmu_res_depend_tab_entry *depend_tab = NULL;
 	unsigned int depend_tab_size;

 	switch (bus->chip_id) {
 	case 0x4312:
 	case 0x4322:
 		/* We keep the default settings:
 		 * min_msk = 0xCBB
 		 * max_msk = 0x7FFFF
 		 */
 		break;
 	case 0x4325:
 		/* Power OTP down later. */
 		min_msk = (1 << SSB_PMURES_4325_CBUCK_BURST) |
 			  (1 << SSB_PMURES_4325_LNLDO2_PU);
 		if (chipco_read32(cc, SSB_CHIPCO_CHIPSTAT) &
 		    SSB_CHIPCO_CHST_4325_PMUTOP_2B)
 			min_msk |= (1 << SSB_PMURES_4325_CLDO_CBUCK_BURST);
 		/* The PLL may turn on, if it decides so. */
 		max_msk = 0xFFFFF;
 		updown_tab = pmu_res_updown_tab_4325a0;
 		updown_tab_size = ARRAY_SIZE(pmu_res_updown_tab_4325a0);
 		depend_tab = pmu_res_depend_tab_4325a0;
 		depend_tab_size = ARRAY_SIZE(pmu_res_depend_tab_4325a0);
 		break;
 	case 0x4328:
 		min_msk = (1 << SSB_PMURES_4328_EXT_SWITCHER_PWM) |
 			  (1 << SSB_PMURES_4328_BB_SWITCHER_PWM) |
 			  (1 << SSB_PMURES_4328_XTAL_EN);
 		/* The PLL may turn on, if it decides so. */
 		max_msk = 0xFFFFF;
 		updown_tab = pmu_res_updown_tab_4328a0;
 		updown_tab_size = ARRAY_SIZE(pmu_res_updown_tab_4328a0);
 		depend_tab = pmu_res_depend_tab_4328a0;
 		depend_tab_size = ARRAY_SIZE(pmu_res_depend_tab_4328a0);
 		break;
 	case 0x5354:
 		/* The PLL may turn on, if it decides so. */
 		max_msk = 0xFFFFF;
 		break;
 	default:
 		ssb_printk(KERN_ERR PFX
 			   "ERROR: PMU resource config unknown for device %04X\n",
 			   bus->chip_id);
 	}

 	if (updown_tab) {
 		for (i = 0; i < updown_tab_size; i++) {
 			chipco_write32(cc, SSB_CHIPCO_PMU_RES_TABSEL,
 				       updown_tab[i].resource);
 			chipco_write32(cc, SSB_CHIPCO_PMU_RES_UPDNTM,
 				       updown_tab[i].updown);
 		}
 	}
 	if (depend_tab) {
 		for (i = 0; i < depend_tab_size; i++) {
 			chipco_write32(cc, SSB_CHIPCO_PMU_RES_TABSEL,
 				       depend_tab[i].resource);
 			switch (depend_tab[i].task) {
 			case PMU_RES_DEP_SET:
 				chipco_write32(cc, SSB_CHIPCO_PMU_RES_DEPMSK,
 					       depend_tab[i].depend);
 				break;
 			case PMU_RES_DEP_ADD:
 				chipco_set32(cc, SSB_CHIPCO_PMU_RES_DEPMSK,
 					     depend_tab[i].depend);
 				break;
 			case PMU_RES_DEP_REMOVE:
 				chipco_mask32(cc, SSB_CHIPCO_PMU_RES_DEPMSK,
 					      ~(depend_tab[i].depend));
 				break;
 			default:
 				SSB_WARN_ON(1);
 			}
 		}
 	}

 	/* Set the resource masks. */
 	if (min_msk)
 		chipco_write32(cc, SSB_CHIPCO_PMU_MINRES_MSK, min_msk);
 	if (max_msk)
 		chipco_write32(cc, SSB_CHIPCO_PMU_MAXRES_MSK, max_msk);
 }

 /* http://bcm-v4.sipsolutions.net/802.11/SSB/PmuInit */
 void ssb_pmu_init(struct ssb_chipcommon *cc)
 {
 	u32 pmucap;

 	if (!(cc->capabilities & SSB_CHIPCO_CAP_PMU))
 		return;

 	pmucap = chipco_read32(cc, SSB_CHIPCO_PMU_CAP);
 	cc->pmu.rev = (pmucap & SSB_CHIPCO_PMU_CAP_REVISION);

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

 	if (cc->pmu.rev == 1)
 		chipco_mask32(cc, SSB_CHIPCO_PMU_CTL,
 			      ~SSB_CHIPCO_PMU_CTL_NOILPONW);
 	else
 		chipco_set32(cc, SSB_CHIPCO_PMU_CTL,
 			     SSB_CHIPCO_PMU_CTL_NOILPONW);
 	ssb_pmu_pll_init(cc);
 	ssb_pmu_resources_init(cc);
 }

 void ssb_pmu_set_ldo_voltage(struct ssb_chipcommon *cc,
 			     enum ssb_pmu_ldo_volt_id id, u32 voltage)
 {
 	struct ssb_bus *bus = cc->dev->bus;
 	u32 addr, shift, mask;

 	switch (bus->chip_id) {
 	case 0x4328:
 	case 0x5354:
 		switch (id) {
 		case LDO_VOLT1:
 			addr = 2;
 			shift = 25;
 			mask = 0xF;
 			break;
 		case LDO_VOLT2:
 			addr = 3;
 			shift = 1;
 			mask = 0xF;
 			break;
 		case LDO_VOLT3:
 			addr = 3;
 			shift = 9;
 			mask = 0xF;
 			break;
 		case LDO_PAREF:
 			addr = 3;
 			shift = 17;
 			mask = 0x3F;
 			break;
 		default:
 			SSB_WARN_ON(1);
 			return;
 		}
 		break;
 	case 0x4312:
 		if (SSB_WARN_ON(id != LDO_PAREF))
 			return;
 		addr = 0;
 		shift = 21;
 		mask = 0x3F;
 		break;
 	default:
 		return;
 	}

 	ssb_chipco_regctl_maskset(cc, addr, ~(mask << shift),
 				  (voltage & mask) << shift);
 }

 void ssb_pmu_set_ldo_paref(struct ssb_chipcommon *cc, bool on)
 {
 	struct ssb_bus *bus = cc->dev->bus;
 	int ldo;

 	switch (bus->chip_id) {
 	case 0x4312:
 		ldo = SSB_PMURES_4312_PA_REF_LDO;
 		break;
 	case 0x4328:
 		ldo = SSB_PMURES_4328_PA_REF_LDO;
 		break;
 	case 0x5354:
 		ldo = SSB_PMURES_5354_PA_REF_LDO;
 		break;
 	default:
 		return;
 	}

 	if (on)
 		chipco_set32(cc, SSB_CHIPCO_PMU_MINRES_MSK, 1 << ldo);
 	else
 		chipco_mask32(cc, SSB_CHIPCO_PMU_MINRES_MSK, ~(1 << ldo));
 	chipco_read32(cc, SSB_CHIPCO_PMU_MINRES_MSK); //SPEC FIXME found via mmiotrace - dummy read?
 }

 EXPORT_SYMBOL(ssb_pmu_set_ldo_voltage);
 EXPORT_SYMBOL(ssb_pmu_set_ldo_paref);
	/*
	* Sonics Silicon Backplane
	* Broadcom ChipCommon Power Management Unit driver
	*
	* Copyright 2009, Michael Buesch <mb@bu3sch.de>
	* Copyright 2007, Broadcom Corporation
	*
	* Licensed under the GNU/GPL. See COPYING for details.
	*/

	#include <linux/ssb/ssb.h>
	#include <linux/ssb/ssb_regs.h>
	#include <linux/ssb/ssb_driver_chipcommon.h>
	#include <linux/delay.h>

	#include "ssb_private.h"

	static u32 ssb_chipco_pll_read(struct ssb_chipcommon *cc, u32 offset)
	{
	chipco_write32(cc, SSB_CHIPCO_PLLCTL_ADDR, offset);
	return chipco_read32(cc, SSB_CHIPCO_PLLCTL_DATA);
	}

	static void ssb_chipco_pll_write(struct ssb_chipcommon *cc,
	u32 offset, u32 value)
	{
	chipco_write32(cc, SSB_CHIPCO_PLLCTL_ADDR, offset);
	chipco_write32(cc, SSB_CHIPCO_PLLCTL_DATA, value);
	}

	static void ssb_chipco_regctl_maskset(struct ssb_chipcommon *cc,
	u32 offset, u32 mask, u32 set)
	{
	u32 value;

	chipco_read32(cc, SSB_CHIPCO_REGCTL_ADDR);
	chipco_write32(cc, SSB_CHIPCO_REGCTL_ADDR, offset);
	chipco_read32(cc, SSB_CHIPCO_REGCTL_ADDR);
	value = chipco_read32(cc, SSB_CHIPCO_REGCTL_DATA);
	value &= mask;
	value \|= set;
	chipco_write32(cc, SSB_CHIPCO_REGCTL_DATA, value);
	chipco_read32(cc, SSB_CHIPCO_REGCTL_DATA);
	}

	struct pmu0_plltab_entry {
	u16 freq; /* Crystal frequency in kHz.*/
	u8 xf; /* Crystal frequency value for PMU control */
	u8 wb_int;
	u32 wb_frac;
	};

	static const struct pmu0_plltab_entry pmu0_plltab[] = {
	{ .freq = 12000, .xf = 1, .wb_int = 73, .wb_frac = 349525, },
	{ .freq = 13000, .xf = 2, .wb_int = 67, .wb_frac = 725937, },
	{ .freq = 14400, .xf = 3, .wb_int = 61, .wb_frac = 116508, },
	{ .freq = 15360, .xf = 4, .wb_int = 57, .wb_frac = 305834, },
	{ .freq = 16200, .xf = 5, .wb_int = 54, .wb_frac = 336579, },
	{ .freq = 16800, .xf = 6, .wb_int = 52, .wb_frac = 399457, },
	{ .freq = 19200, .xf = 7, .wb_int = 45, .wb_frac = 873813, },
	{ .freq = 19800, .xf = 8, .wb_int = 44, .wb_frac = 466033, },
	{ .freq = 20000, .xf = 9, .wb_int = 44, .wb_frac = 0, },
	{ .freq = 25000, .xf = 10, .wb_int = 70, .wb_frac = 419430, },
	{ .freq = 26000, .xf = 11, .wb_int = 67, .wb_frac = 725937, },
	{ .freq = 30000, .xf = 12, .wb_int = 58, .wb_frac = 699050, },
	{ .freq = 38400, .xf = 13, .wb_int = 45, .wb_frac = 873813, },
	{ .freq = 40000, .xf = 14, .wb_int = 45, .wb_frac = 0, },
	};
	#define SSB_PMU0_DEFAULT_XTALFREQ 20000

	static const struct pmu0_plltab_entry * pmu0_plltab_find_entry(u32 crystalfreq)
	{
	const struct pmu0_plltab_entry *e;
	unsigned int i;

	for (i = 0; i < ARRAY_SIZE(pmu0_plltab); i++) {
	e = &pmu0_plltab[i];
	if (e->freq == crystalfreq)
	return e;
	}

	return NULL;
	}

	/* Tune the PLL to the crystal speed. crystalfreq is in kHz. */
	static void ssb_pmu0_pllinit_r0(struct ssb_chipcommon *cc,
	u32 crystalfreq)
	{
	struct ssb_bus *bus = cc->dev->bus;
	const struct pmu0_plltab_entry *e = NULL;
	u32 pmuctl, tmp, pllctl;
	unsigned int i;

	if ((bus->chip_id == 0x5354) && !crystalfreq) {
	/* The 5354 crystal freq is 25MHz */
	crystalfreq = 25000;
	}
	if (crystalfreq)
	e = pmu0_plltab_find_entry(crystalfreq);
	if (!e)
	e = pmu0_plltab_find_entry(SSB_PMU0_DEFAULT_XTALFREQ);
	BUG_ON(!e);
	crystalfreq = e->freq;
	cc->pmu.crystalfreq = e->freq;

	/* Check if the PLL already is programmed to this frequency. */
	pmuctl = chipco_read32(cc, SSB_CHIPCO_PMU_CTL);
	if (((pmuctl & SSB_CHIPCO_PMU_CTL_XTALFREQ) >> SSB_CHIPCO_PMU_CTL_XTALFREQ_SHIFT) == e->xf) {
	/* We're already there... */
	return;
	}

	ssb_printk(KERN_INFO PFX "Programming PLL to %u.%03u MHz\n",
	(crystalfreq / 1000), (crystalfreq % 1000));

	/* First turn the PLL off. */
	switch (bus->chip_id) {
	case 0x4328:
	chipco_mask32(cc, SSB_CHIPCO_PMU_MINRES_MSK,
	~(1 << SSB_PMURES_4328_BB_PLL_PU));
	chipco_mask32(cc, SSB_CHIPCO_PMU_MAXRES_MSK,
	~(1 << SSB_PMURES_4328_BB_PLL_PU));
	break;
	case 0x5354:
	chipco_mask32(cc, SSB_CHIPCO_PMU_MINRES_MSK,
	~(1 << SSB_PMURES_5354_BB_PLL_PU));
	chipco_mask32(cc, SSB_CHIPCO_PMU_MAXRES_MSK,
	~(1 << SSB_PMURES_5354_BB_PLL_PU));
	break;
	default:
	SSB_WARN_ON(1);
	}
	for (i = 1500; i; i--) {
	tmp = chipco_read32(cc, SSB_CHIPCO_CLKCTLST);
	if (!(tmp & SSB_CHIPCO_CLKCTLST_HAVEHT))
	break;
	udelay(10);
	}
	tmp = chipco_read32(cc, SSB_CHIPCO_CLKCTLST);
	if (tmp & SSB_CHIPCO_CLKCTLST_HAVEHT)
	ssb_printk(KERN_EMERG PFX "Failed to turn the PLL off!\n");

	/* Set PDIV in PLL control 0. */
	pllctl = ssb_chipco_pll_read(cc, SSB_PMU0_PLLCTL0);
	if (crystalfreq >= SSB_PMU0_PLLCTL0_PDIV_FREQ)
	pllctl \|= SSB_PMU0_PLLCTL0_PDIV_MSK;
	else
	pllctl &= ~SSB_PMU0_PLLCTL0_PDIV_MSK;
	ssb_chipco_pll_write(cc, SSB_PMU0_PLLCTL0, pllctl);

	/* Set WILD in PLL control 1. */
	pllctl = ssb_chipco_pll_read(cc, SSB_PMU0_PLLCTL1);
	pllctl &= ~SSB_PMU0_PLLCTL1_STOPMOD;
	pllctl &= ~(SSB_PMU0_PLLCTL1_WILD_IMSK \| SSB_PMU0_PLLCTL1_WILD_FMSK);
	pllctl \|= ((u32)e->wb_int << SSB_PMU0_PLLCTL1_WILD_IMSK_SHIFT) & SSB_PMU0_PLLCTL1_WILD_IMSK;
	pllctl \|= ((u32)e->wb_frac << SSB_PMU0_PLLCTL1_WILD_FMSK_SHIFT) & SSB_PMU0_PLLCTL1_WILD_FMSK;
	if (e->wb_frac == 0)
	pllctl \|= SSB_PMU0_PLLCTL1_STOPMOD;
	ssb_chipco_pll_write(cc, SSB_PMU0_PLLCTL1, pllctl);

	/* Set WILD in PLL control 2. */
	pllctl = ssb_chipco_pll_read(cc, SSB_PMU0_PLLCTL2);
	pllctl &= ~SSB_PMU0_PLLCTL2_WILD_IMSKHI;
	pllctl \|= (((u32)e->wb_int >> 4) << SSB_PMU0_PLLCTL2_WILD_IMSKHI_SHIFT) & SSB_PMU0_PLLCTL2_WILD_IMSKHI;
	ssb_chipco_pll_write(cc, SSB_PMU0_PLLCTL2, pllctl);

	/* Set the crystalfrequency and the divisor. */
	pmuctl = chipco_read32(cc, SSB_CHIPCO_PMU_CTL);
	pmuctl &= ~SSB_CHIPCO_PMU_CTL_ILP_DIV;
	pmuctl \|= (((crystalfreq + 127) / 128 - 1) << SSB_CHIPCO_PMU_CTL_ILP_DIV_SHIFT)
	& SSB_CHIPCO_PMU_CTL_ILP_DIV;
	pmuctl &= ~SSB_CHIPCO_PMU_CTL_XTALFREQ;
	pmuctl \|= ((u32)e->xf << SSB_CHIPCO_PMU_CTL_XTALFREQ_SHIFT) & SSB_CHIPCO_PMU_CTL_XTALFREQ;
	chipco_write32(cc, SSB_CHIPCO_PMU_CTL, pmuctl);
	}

	struct pmu1_plltab_entry {
	u16 freq; /* Crystal frequency in kHz.*/
	u8 xf; /* Crystal frequency value for PMU control */
	u8 ndiv_int;
	u32 ndiv_frac;
	u8 p1div;
	u8 p2div;
	};

	static const struct pmu1_plltab_entry pmu1_plltab[] = {
	{ .freq = 12000, .xf = 1, .p1div = 3, .p2div = 22, .ndiv_int = 0x9, .ndiv_frac = 0xFFFFEF, },
	{ .freq = 13000, .xf = 2, .p1div = 1, .p2div = 6, .ndiv_int = 0xb, .ndiv_frac = 0x483483, },
	{ .freq = 14400, .xf = 3, .p1div = 1, .p2div = 10, .ndiv_int = 0xa, .ndiv_frac = 0x1C71C7, },
	{ .freq = 15360, .xf = 4, .p1div = 1, .p2div = 5, .ndiv_int = 0xb, .ndiv_frac = 0x755555, },
	{ .freq = 16200, .xf = 5, .p1div = 1, .p2div = 10, .ndiv_int = 0x5, .ndiv_frac = 0x6E9E06, },
	{ .freq = 16800, .xf = 6, .p1div = 1, .p2div = 10, .ndiv_int = 0x5, .ndiv_frac = 0x3CF3CF, },
	{ .freq = 19200, .xf = 7, .p1div = 1, .p2div = 9, .ndiv_int = 0x5, .ndiv_frac = 0x17B425, },
	{ .freq = 19800, .xf = 8, .p1div = 1, .p2div = 11, .ndiv_int = 0x4, .ndiv_frac = 0xA57EB, },
	{ .freq = 20000, .xf = 9, .p1div = 1, .p2div = 11, .ndiv_int = 0x4, .ndiv_frac = 0, },
	{ .freq = 24000, .xf = 10, .p1div = 3, .p2div = 11, .ndiv_int = 0xa, .ndiv_frac = 0, },
	{ .freq = 25000, .xf = 11, .p1div = 5, .p2div = 16, .ndiv_int = 0xb, .ndiv_frac = 0, },
	{ .freq = 26000, .xf = 12, .p1div = 1, .p2div = 2, .ndiv_int = 0x10, .ndiv_frac = 0xEC4EC4, },
	{ .freq = 30000, .xf = 13, .p1div = 3, .p2div = 8, .ndiv_int = 0xb, .ndiv_frac = 0, },
	{ .freq = 38400, .xf = 14, .p1div = 1, .p2div = 5, .ndiv_int = 0x4, .ndiv_frac = 0x955555, },
	{ .freq = 40000, .xf = 15, .p1div = 1, .p2div = 2, .ndiv_int = 0xb, .ndiv_frac = 0, },
	};

	#define SSB_PMU1_DEFAULT_XTALFREQ 15360

	static const struct pmu1_plltab_entry * pmu1_plltab_find_entry(u32 crystalfreq)
	{
	const struct pmu1_plltab_entry *e;
	unsigned int i;

	for (i = 0; i < ARRAY_SIZE(pmu1_plltab); i++) {
	e = &pmu1_plltab[i];
	if (e->freq == crystalfreq)
	return e;
	}

	return NULL;
	}

	/* Tune the PLL to the crystal speed. crystalfreq is in kHz. */
	static void ssb_pmu1_pllinit_r0(struct ssb_chipcommon *cc,
	u32 crystalfreq)
	{
	struct ssb_bus *bus = cc->dev->bus;
	const struct pmu1_plltab_entry *e = NULL;
	u32 buffer_strength = 0;
	u32 tmp, pllctl, pmuctl;
	unsigned int i;

	if (bus->chip_id == 0x4312) {
	/* We do not touch the BCM4312 PLL and assume
	* the default crystal settings work out-of-the-box. */
	cc->pmu.crystalfreq = 20000;
	return;
	}

	if (crystalfreq)
	e = pmu1_plltab_find_entry(crystalfreq);
	if (!e)
	e = pmu1_plltab_find_entry(SSB_PMU1_DEFAULT_XTALFREQ);
	BUG_ON(!e);
	crystalfreq = e->freq;
	cc->pmu.crystalfreq = e->freq;

	/* Check if the PLL already is programmed to this frequency. */
	pmuctl = chipco_read32(cc, SSB_CHIPCO_PMU_CTL);
	if (((pmuctl & SSB_CHIPCO_PMU_CTL_XTALFREQ) >> SSB_CHIPCO_PMU_CTL_XTALFREQ_SHIFT) == e->xf) {
	/* We're already there... */
	return;
	}

	ssb_printk(KERN_INFO PFX "Programming PLL to %u.%03u MHz\n",
	(crystalfreq / 1000), (crystalfreq % 1000));

	/* First turn the PLL off. */
	switch (bus->chip_id) {
	case 0x4325:
	chipco_mask32(cc, SSB_CHIPCO_PMU_MINRES_MSK,
	~((1 << SSB_PMURES_4325_BBPLL_PWRSW_PU) \|
	(1 << SSB_PMURES_4325_HT_AVAIL)));
	chipco_mask32(cc, SSB_CHIPCO_PMU_MAXRES_MSK,
	~((1 << SSB_PMURES_4325_BBPLL_PWRSW_PU) \|
	(1 << SSB_PMURES_4325_HT_AVAIL)));
	/* Adjust the BBPLL to 2 on all channels later. */
	buffer_strength = 0x222222;
	break;
	default:
	SSB_WARN_ON(1);
	}
	for (i = 1500; i; i--) {
	tmp = chipco_read32(cc, SSB_CHIPCO_CLKCTLST);
	if (!(tmp & SSB_CHIPCO_CLKCTLST_HAVEHT))
	break;
	udelay(10);
	}
	tmp = chipco_read32(cc, SSB_CHIPCO_CLKCTLST);
	if (tmp & SSB_CHIPCO_CLKCTLST_HAVEHT)
	ssb_printk(KERN_EMERG PFX "Failed to turn the PLL off!\n");

	/* Set p1div and p2div. */
	pllctl = ssb_chipco_pll_read(cc, SSB_PMU1_PLLCTL0);
	pllctl &= ~(SSB_PMU1_PLLCTL0_P1DIV \| SSB_PMU1_PLLCTL0_P2DIV);
	pllctl \|= ((u32)e->p1div << SSB_PMU1_PLLCTL0_P1DIV_SHIFT) & SSB_PMU1_PLLCTL0_P1DIV;
	pllctl \|= ((u32)e->p2div << SSB_PMU1_PLLCTL0_P2DIV_SHIFT) & SSB_PMU1_PLLCTL0_P2DIV;
	ssb_chipco_pll_write(cc, SSB_PMU1_PLLCTL0, pllctl);

	/* Set ndiv int and ndiv mode */
	pllctl = ssb_chipco_pll_read(cc, SSB_PMU1_PLLCTL2);
	pllctl &= ~(SSB_PMU1_PLLCTL2_NDIVINT \| SSB_PMU1_PLLCTL2_NDIVMODE);
	pllctl \|= ((u32)e->ndiv_int << SSB_PMU1_PLLCTL2_NDIVINT_SHIFT) & SSB_PMU1_PLLCTL2_NDIVINT;
	pllctl \|= (1 << SSB_PMU1_PLLCTL2_NDIVMODE_SHIFT) & SSB_PMU1_PLLCTL2_NDIVMODE;
	ssb_chipco_pll_write(cc, SSB_PMU1_PLLCTL2, pllctl);

	/* Set ndiv frac */
	pllctl = ssb_chipco_pll_read(cc, SSB_PMU1_PLLCTL3);
	pllctl &= ~SSB_PMU1_PLLCTL3_NDIVFRAC;
	pllctl \|= ((u32)e->ndiv_frac << SSB_PMU1_PLLCTL3_NDIVFRAC_SHIFT) & SSB_PMU1_PLLCTL3_NDIVFRAC;
	ssb_chipco_pll_write(cc, SSB_PMU1_PLLCTL3, pllctl);

	/* Change the drive strength, if required. */
	if (buffer_strength) {
	pllctl = ssb_chipco_pll_read(cc, SSB_PMU1_PLLCTL5);
	pllctl &= ~SSB_PMU1_PLLCTL5_CLKDRV;
	pllctl \|= (buffer_strength << SSB_PMU1_PLLCTL5_CLKDRV_SHIFT) & SSB_PMU1_PLLCTL5_CLKDRV;
	ssb_chipco_pll_write(cc, SSB_PMU1_PLLCTL5, pllctl);
	}

	/* Tune the crystalfreq and the divisor. */
	pmuctl = chipco_read32(cc, SSB_CHIPCO_PMU_CTL);
	pmuctl &= ~(SSB_CHIPCO_PMU_CTL_ILP_DIV \| SSB_CHIPCO_PMU_CTL_XTALFREQ);
	pmuctl \|= ((((u32)e->freq + 127) / 128 - 1) << SSB_CHIPCO_PMU_CTL_ILP_DIV_SHIFT)
	& SSB_CHIPCO_PMU_CTL_ILP_DIV;
	pmuctl \|= ((u32)e->xf << SSB_CHIPCO_PMU_CTL_XTALFREQ_SHIFT) & SSB_CHIPCO_PMU_CTL_XTALFREQ;
	chipco_write32(cc, SSB_CHIPCO_PMU_CTL, pmuctl);
	}

	static void ssb_pmu_pll_init(struct ssb_chipcommon *cc)
	{
	struct ssb_bus *bus = cc->dev->bus;
	u32 crystalfreq = 0; /* in kHz. 0 = keep default freq. */

	if (bus->bustype == SSB_BUSTYPE_SSB) {
	/* TODO: The user may override the crystal frequency. */
	}

	switch (bus->chip_id) {
	case 0x4312:
	case 0x4325:
	ssb_pmu1_pllinit_r0(cc, crystalfreq);
	break;
	case 0x4328:
	case 0x5354:
	ssb_pmu0_pllinit_r0(cc, crystalfreq);
	break;
	case 0x4322:
	if (cc->pmu.rev == 2) {
	chipco_write32(cc, SSB_CHIPCO_PLLCTL_ADDR, 0x0000000A);
	chipco_write32(cc, SSB_CHIPCO_PLLCTL_DATA, 0x380005C0);
	}
	break;
	default:
	ssb_printk(KERN_ERR PFX
	"ERROR: PLL init unknown for device %04X\n",
	bus->chip_id);
	}
	}

	struct pmu_res_updown_tab_entry {
	u8 resource; /* The resource number */
	u16 updown; /* The updown value */
	};

	enum pmu_res_depend_tab_task {
	PMU_RES_DEP_SET = 1,
	PMU_RES_DEP_ADD,
	PMU_RES_DEP_REMOVE,
	};

	struct pmu_res_depend_tab_entry {
	u8 resource; /* The resource number */
	u8 task; /* SET \| ADD \| REMOVE */
	u32 depend; /* The depend mask */
	};

	static const struct pmu_res_updown_tab_entry pmu_res_updown_tab_4328a0[] = {
	{ .resource = SSB_PMURES_4328_EXT_SWITCHER_PWM, .updown = 0x0101, },
	{ .resource = SSB_PMURES_4328_BB_SWITCHER_PWM, .updown = 0x1F01, },
	{ .resource = SSB_PMURES_4328_BB_SWITCHER_BURST, .updown = 0x010F, },
	{ .resource = SSB_PMURES_4328_BB_EXT_SWITCHER_BURST, .updown = 0x0101, },
	{ .resource = SSB_PMURES_4328_ILP_REQUEST, .updown = 0x0202, },
	{ .resource = SSB_PMURES_4328_RADIO_SWITCHER_PWM, .updown = 0x0F01, },
	{ .resource = SSB_PMURES_4328_RADIO_SWITCHER_BURST, .updown = 0x0F01, },
	{ .resource = SSB_PMURES_4328_ROM_SWITCH, .updown = 0x0101, },
	{ .resource = SSB_PMURES_4328_PA_REF_LDO, .updown = 0x0F01, },
	{ .resource = SSB_PMURES_4328_RADIO_LDO, .updown = 0x0F01, },
	{ .resource = SSB_PMURES_4328_AFE_LDO, .updown = 0x0F01, },
	{ .resource = SSB_PMURES_4328_PLL_LDO, .updown = 0x0F01, },
	{ .resource = SSB_PMURES_4328_BG_FILTBYP, .updown = 0x0101, },
	{ .resource = SSB_PMURES_4328_TX_FILTBYP, .updown = 0x0101, },
	{ .resource = SSB_PMURES_4328_RX_FILTBYP, .updown = 0x0101, },
	{ .resource = SSB_PMURES_4328_XTAL_PU, .updown = 0x0101, },
	{ .resource = SSB_PMURES_4328_XTAL_EN, .updown = 0xA001, },
	{ .resource = SSB_PMURES_4328_BB_PLL_FILTBYP, .updown = 0x0101, },
	{ .resource = SSB_PMURES_4328_RF_PLL_FILTBYP, .updown = 0x0101, },
	{ .resource = SSB_PMURES_4328_BB_PLL_PU, .updown = 0x0701, },
	};

	static const struct pmu_res_depend_tab_entry pmu_res_depend_tab_4328a0[] = {
	{
	/* Adjust ILP Request to avoid forcing EXT/BB into burst mode. */
	.resource = SSB_PMURES_4328_ILP_REQUEST,
	.task = PMU_RES_DEP_SET,
	.depend = ((1 << SSB_PMURES_4328_EXT_SWITCHER_PWM) \|
	(1 << SSB_PMURES_4328_BB_SWITCHER_PWM)),
	},
	};

	static const struct pmu_res_updown_tab_entry pmu_res_updown_tab_4325a0[] = {
	{ .resource = SSB_PMURES_4325_XTAL_PU, .updown = 0x1501, },
	};

	static const struct pmu_res_depend_tab_entry pmu_res_depend_tab_4325a0[] = {
	{
	/* Adjust HT-Available dependencies. */
	.resource = SSB_PMURES_4325_HT_AVAIL,
	.task = PMU_RES_DEP_ADD,
	.depend = ((1 << SSB_PMURES_4325_RX_PWRSW_PU) \|
	(1 << SSB_PMURES_4325_TX_PWRSW_PU) \|
	(1 << SSB_PMURES_4325_LOGEN_PWRSW_PU) \|
	(1 << SSB_PMURES_4325_AFE_PWRSW_PU)),
	},
	};

	static void ssb_pmu_resources_init(struct ssb_chipcommon *cc)
	{
	struct ssb_bus *bus = cc->dev->bus;
	u32 min_msk = 0, max_msk = 0;
	unsigned int i;
	const struct pmu_res_updown_tab_entry *updown_tab = NULL;
	unsigned int updown_tab_size;
	const struct pmu_res_depend_tab_entry *depend_tab = NULL;
	unsigned int depend_tab_size;

	switch (bus->chip_id) {
	case 0x4312:
	case 0x4322:
	/* We keep the default settings:
	* min_msk = 0xCBB
	* max_msk = 0x7FFFF
	*/
	break;
	case 0x4325:
	/* Power OTP down later. */
	min_msk = (1 << SSB_PMURES_4325_CBUCK_BURST) \|
	(1 << SSB_PMURES_4325_LNLDO2_PU);
	if (chipco_read32(cc, SSB_CHIPCO_CHIPSTAT) &
	SSB_CHIPCO_CHST_4325_PMUTOP_2B)
	min_msk \|= (1 << SSB_PMURES_4325_CLDO_CBUCK_BURST);
	/* The PLL may turn on, if it decides so. */
	max_msk = 0xFFFFF;
	updown_tab = pmu_res_updown_tab_4325a0;
	updown_tab_size = ARRAY_SIZE(pmu_res_updown_tab_4325a0);
	depend_tab = pmu_res_depend_tab_4325a0;
	depend_tab_size = ARRAY_SIZE(pmu_res_depend_tab_4325a0);
	break;
	case 0x4328:
	min_msk = (1 << SSB_PMURES_4328_EXT_SWITCHER_PWM) \|
	(1 << SSB_PMURES_4328_BB_SWITCHER_PWM) \|
	(1 << SSB_PMURES_4328_XTAL_EN);
	/* The PLL may turn on, if it decides so. */
	max_msk = 0xFFFFF;
	updown_tab = pmu_res_updown_tab_4328a0;
	updown_tab_size = ARRAY_SIZE(pmu_res_updown_tab_4328a0);
	depend_tab = pmu_res_depend_tab_4328a0;
	depend_tab_size = ARRAY_SIZE(pmu_res_depend_tab_4328a0);
	break;
	case 0x5354:
	/* The PLL may turn on, if it decides so. */
	max_msk = 0xFFFFF;
	break;
	default:
	ssb_printk(KERN_ERR PFX
	"ERROR: PMU resource config unknown for device %04X\n",
	bus->chip_id);
	}

	if (updown_tab) {
	for (i = 0; i < updown_tab_size; i++) {
	chipco_write32(cc, SSB_CHIPCO_PMU_RES_TABSEL,
	updown_tab[i].resource);
	chipco_write32(cc, SSB_CHIPCO_PMU_RES_UPDNTM,
	updown_tab[i].updown);
	}
	}
	if (depend_tab) {
	for (i = 0; i < depend_tab_size; i++) {
	chipco_write32(cc, SSB_CHIPCO_PMU_RES_TABSEL,
	depend_tab[i].resource);
	switch (depend_tab[i].task) {
	case PMU_RES_DEP_SET:
	chipco_write32(cc, SSB_CHIPCO_PMU_RES_DEPMSK,
	depend_tab[i].depend);
	break;
	case PMU_RES_DEP_ADD:
	chipco_set32(cc, SSB_CHIPCO_PMU_RES_DEPMSK,
	depend_tab[i].depend);
	break;
	case PMU_RES_DEP_REMOVE:
	chipco_mask32(cc, SSB_CHIPCO_PMU_RES_DEPMSK,
	~(depend_tab[i].depend));
	break;
	default:
	SSB_WARN_ON(1);
	}
	}
	}

	/* Set the resource masks. */
	if (min_msk)
	chipco_write32(cc, SSB_CHIPCO_PMU_MINRES_MSK, min_msk);
	if (max_msk)
	chipco_write32(cc, SSB_CHIPCO_PMU_MAXRES_MSK, max_msk);
	}

	/* http://bcm-v4.sipsolutions.net/802.11/SSB/PmuInit */
	void ssb_pmu_init(struct ssb_chipcommon *cc)
	{
	u32 pmucap;

	if (!(cc->capabilities & SSB_CHIPCO_CAP_PMU))
	return;

	pmucap = chipco_read32(cc, SSB_CHIPCO_PMU_CAP);
	cc->pmu.rev = (pmucap & SSB_CHIPCO_PMU_CAP_REVISION);

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

	if (cc->pmu.rev == 1)
	chipco_mask32(cc, SSB_CHIPCO_PMU_CTL,
	~SSB_CHIPCO_PMU_CTL_NOILPONW);
	else
	chipco_set32(cc, SSB_CHIPCO_PMU_CTL,
	SSB_CHIPCO_PMU_CTL_NOILPONW);
	ssb_pmu_pll_init(cc);
	ssb_pmu_resources_init(cc);
	}

	void ssb_pmu_set_ldo_voltage(struct ssb_chipcommon *cc,
	enum ssb_pmu_ldo_volt_id id, u32 voltage)
	{
	struct ssb_bus *bus = cc->dev->bus;
	u32 addr, shift, mask;

	switch (bus->chip_id) {
	case 0x4328:
	case 0x5354:
	switch (id) {
	case LDO_VOLT1:
	addr = 2;
	shift = 25;
	mask = 0xF;
	break;
	case LDO_VOLT2:
	addr = 3;
	shift = 1;
	mask = 0xF;
	break;
	case LDO_VOLT3:
	addr = 3;
	shift = 9;
	mask = 0xF;
	break;
	case LDO_PAREF:
	addr = 3;
	shift = 17;
	mask = 0x3F;
	break;
	default:
	SSB_WARN_ON(1);
	return;
	}
	break;
	case 0x4312:
	if (SSB_WARN_ON(id != LDO_PAREF))
	return;
	addr = 0;
	shift = 21;
	mask = 0x3F;
	break;
	default:
	return;
	}

	ssb_chipco_regctl_maskset(cc, addr, ~(mask << shift),
	(voltage & mask) << shift);
	}

	void ssb_pmu_set_ldo_paref(struct ssb_chipcommon *cc, bool on)
	{
	struct ssb_bus *bus = cc->dev->bus;
	int ldo;

	switch (bus->chip_id) {
	case 0x4312:
	ldo = SSB_PMURES_4312_PA_REF_LDO;
	break;
	case 0x4328:
	ldo = SSB_PMURES_4328_PA_REF_LDO;
	break;
	case 0x5354:
	ldo = SSB_PMURES_5354_PA_REF_LDO;
	break;
	default:
	return;
	}

	if (on)
	chipco_set32(cc, SSB_CHIPCO_PMU_MINRES_MSK, 1 << ldo);
	else
	chipco_mask32(cc, SSB_CHIPCO_PMU_MINRES_MSK, ~(1 << ldo));
	chipco_read32(cc, SSB_CHIPCO_PMU_MINRES_MSK); //SPEC FIXME found via mmiotrace - dummy read?
	}

	EXPORT_SYMBOL(ssb_pmu_set_ldo_voltage);
	EXPORT_SYMBOL(ssb_pmu_set_ldo_paref);