net: wireless: add brcm80211 drivers

Add the brcm80211 tree to drivers/net/wireless, and disable the version that's
in drivers/staging.  This version includes the sources currently in staging,
plus any changes that have been sent out for review.

Sources in staging will be deleted in a followup patch.

Signed-off-by: Arend van Spriel <arend@broadcom.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 835 insertions, 0 deletions

diff --git a/drivers/net/wireless/brcm80211/brcmsmac/nicpci.c b/drivers/net/wireless/brcm80211/brcmsmac/nicpci.c
new file mode 100644
index 000000000000..0bcb26792046
--- /dev/null
+++ b/drivers/net/wireless/brcm80211/brcmsmac/nicpci.c
@@ -0,0 +1,835 @@
+/*
+ * Copyright (c) 2010 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/slab.h>
+#include <linux/delay.h>
+#include <linux/pci.h>
+
+#include <defs.h>
+#include <soc.h>
+#include <chipcommon.h>
+#include "aiutils.h"
+#include "pub.h"
+#include "nicpci.h"
+
+/* SPROM offsets */
+#define SRSH_ASPM_OFFSET		4	/* word 4 */
+#define SRSH_ASPM_ENB			0x18	/* bit 3, 4 */
+#define SRSH_ASPM_L1_ENB		0x10	/* bit 4 */
+#define SRSH_ASPM_L0s_ENB		0x8	/* bit 3 */
+
+#define SRSH_PCIE_MISC_CONFIG		5	/* word 5 */
+#define SRSH_L23READY_EXIT_NOPERST	0x8000	/* bit 15 */
+#define SRSH_CLKREQ_OFFSET_REV5		20	/* word 20 for srom rev <= 5 */
+#define SRSH_CLKREQ_ENB			0x0800	/* bit 11 */
+#define SRSH_BD_OFFSET                  6	/* word 6 */
+
+/* chipcontrol */
+#define CHIPCTRL_4321_PLL_DOWN		0x800000/* serdes PLL down override */
+
+/* MDIO control */
+#define MDIOCTL_DIVISOR_MASK		0x7f	/* clock to be used on MDIO */
+#define MDIOCTL_DIVISOR_VAL		0x2
+#define MDIOCTL_PREAM_EN		0x80	/* Enable preamble sequnce */
+#define MDIOCTL_ACCESS_DONE		0x100	/* Transaction complete */
+
+/* MDIO Data */
+#define MDIODATA_MASK			0x0000ffff	/* data 2 bytes */
+#define MDIODATA_TA			0x00020000	/* Turnaround */
+
+#define MDIODATA_REGADDR_SHF		18		/* Regaddr shift */
+#define MDIODATA_REGADDR_MASK		0x007c0000	/* Regaddr Mask */
+#define MDIODATA_DEVADDR_SHF		23	/* Physmedia devaddr shift */
+#define MDIODATA_DEVADDR_MASK		0x0f800000
+						/* Physmedia devaddr Mask */
+
+/* MDIO Data for older revisions < 10 */
+#define MDIODATA_REGADDR_SHF_OLD	18	/* Regaddr shift */
+#define MDIODATA_REGADDR_MASK_OLD	0x003c0000
+						/* Regaddr Mask */
+#define MDIODATA_DEVADDR_SHF_OLD	22	/* Physmedia devaddr shift  */
+#define MDIODATA_DEVADDR_MASK_OLD	0x0fc00000
+						/* Physmedia devaddr Mask */
+
+/* Transactions flags */
+#define MDIODATA_WRITE			0x10000000
+#define MDIODATA_READ			0x20000000
+#define MDIODATA_START			0x40000000
+
+#define MDIODATA_DEV_ADDR		0x0	/* dev address for serdes */
+#define	MDIODATA_BLK_ADDR		0x1F	/* blk address for serdes */
+
+/* serdes regs (rev < 10) */
+#define MDIODATA_DEV_PLL		0x1d	/* SERDES PLL Dev */
+#define MDIODATA_DEV_TX			0x1e	/* SERDES TX Dev */
+#define MDIODATA_DEV_RX			0x1f	/* SERDES RX Dev */
+
+/* SERDES RX registers */
+#define SERDES_RX_CTRL			1	/* Rx cntrl */
+#define SERDES_RX_TIMER1		2	/* Rx Timer1 */
+#define SERDES_RX_CDR			6	/* CDR */
+#define SERDES_RX_CDRBW			7	/* CDR BW */
+/* SERDES RX control register */
+#define SERDES_RX_CTRL_FORCE		0x80	/* rxpolarity_force */
+#define SERDES_RX_CTRL_POLARITY		0x40	/* rxpolarity_value */
+
+/* SERDES PLL registers */
+#define SERDES_PLL_CTRL                 1	/* PLL control reg */
+#define PLL_CTRL_FREQDET_EN             0x4000	/* bit 14 is FREQDET on */
+
+/* Linkcontrol reg offset in PCIE Cap */
+#define PCIE_CAP_LINKCTRL_OFFSET	16	/* offset in pcie cap */
+#define PCIE_CAP_LCREG_ASPML0s		0x01	/* ASPM L0s in linkctrl */
+#define PCIE_CAP_LCREG_ASPML1		0x02	/* ASPM L1 in linkctrl */
+#define PCIE_CLKREQ_ENAB		0x100	/* CLKREQ Enab in linkctrl */
+
+#define PCIE_ASPM_ENAB			3	/* ASPM L0s & L1 in linkctrl */
+#define PCIE_ASPM_L1_ENAB		2	/* ASPM L0s & L1 in linkctrl */
+#define PCIE_ASPM_L0s_ENAB		1	/* ASPM L0s & L1 in linkctrl */
+#define PCIE_ASPM_DISAB			0	/* ASPM L0s & L1 in linkctrl */
+
+/* Power management threshold */
+#define PCIE_L1THRESHOLDTIME_MASK       0xFF00	/* bits 8 - 15 */
+#define PCIE_L1THRESHOLDTIME_SHIFT      8	/* PCIE_L1THRESHOLDTIME_SHIFT */
+#define PCIE_L1THRESHOLD_WARVAL         0x72	/* WAR value */
+#define PCIE_ASPMTIMER_EXTEND		0x01000000
+						/* > rev7:
+						 * enable extend ASPM timer
+						 */
+
+/* different register spaces to access thru pcie indirect access */
+#define PCIE_CONFIGREGS		1	/* Access to config space */
+#define PCIE_PCIEREGS		2	/* Access to pcie registers */
+
+/* PCIE protocol PHY diagnostic registers */
+#define	PCIE_PLP_STATUSREG		0x204	/* Status */
+
+/* Status reg PCIE_PLP_STATUSREG */
+#define PCIE_PLP_POLARITYINV_STAT	0x10
+
+/* PCIE protocol DLLP diagnostic registers */
+#define PCIE_DLLP_LCREG			0x100	/* Link Control */
+#define PCIE_DLLP_PMTHRESHREG		0x128	/* Power Management Threshold */
+
+/* PCIE protocol TLP diagnostic registers */
+#define PCIE_TLP_WORKAROUNDSREG		0x004	/* TLP Workarounds */
+
+/* Sonics to PCI translation types */
+#define	SBTOPCI_PREF	0x4		/* prefetch enable */
+#define	SBTOPCI_BURST	0x8		/* burst enable */
+#define	SBTOPCI_RC_READMULTI	0x20	/* memory read multiple */
+
+#define PCI_CLKRUN_DSBL	0x8000	/* Bit 15 forceClkrun */
+
+/* PCI core index in SROM shadow area */
+#define SRSH_PI_OFFSET	0	/* first word */
+#define SRSH_PI_MASK	0xf000	/* bit 15:12 */
+#define SRSH_PI_SHIFT	12	/* bit 15:12 */
+
+/* Sonics side: PCI core and host control registers */
+struct sbpciregs {
+	u32 control;		/* PCI control */
+	u32 PAD[3];
+	u32 arbcontrol;		/* PCI arbiter control */
+	u32 clkrun;		/* Clkrun Control (>=rev11) */
+	u32 PAD[2];
+	u32 intstatus;		/* Interrupt status */
+	u32 intmask;		/* Interrupt mask */
+	u32 sbtopcimailbox;	/* Sonics to PCI mailbox */
+	u32 PAD[9];
+	u32 bcastaddr;		/* Sonics broadcast address */
+	u32 bcastdata;		/* Sonics broadcast data */
+	u32 PAD[2];
+	u32 gpioin;		/* ro: gpio input (>=rev2) */
+	u32 gpioout;		/* rw: gpio output (>=rev2) */
+	u32 gpioouten;		/* rw: gpio output enable (>= rev2) */
+	u32 gpiocontrol;	/* rw: gpio control (>= rev2) */
+	u32 PAD[36];
+	u32 sbtopci0;		/* Sonics to PCI translation 0 */
+	u32 sbtopci1;		/* Sonics to PCI translation 1 */
+	u32 sbtopci2;		/* Sonics to PCI translation 2 */
+	u32 PAD[189];
+	u32 pcicfg[4][64];	/* 0x400 - 0x7FF, PCI Cfg Space (>=rev8) */
+	u16 sprom[36];		/* SPROM shadow Area */
+	u32 PAD[46];
+};
+
+/* SB side: PCIE core and host control registers */
+struct sbpcieregs {
+	u32 control;		/* host mode only */
+	u32 PAD[2];
+	u32 biststatus;		/* bist Status: 0x00C */
+	u32 gpiosel;		/* PCIE gpio sel: 0x010 */
+	u32 gpioouten;		/* PCIE gpio outen: 0x14 */
+	u32 PAD[2];
+	u32 intstatus;		/* Interrupt status: 0x20 */
+	u32 intmask;		/* Interrupt mask: 0x24 */
+	u32 sbtopcimailbox;	/* sb to pcie mailbox: 0x028 */
+	u32 PAD[53];
+	u32 sbtopcie0;		/* sb to pcie translation 0: 0x100 */
+	u32 sbtopcie1;		/* sb to pcie translation 1: 0x104 */
+	u32 sbtopcie2;		/* sb to pcie translation 2: 0x108 */
+	u32 PAD[5];
+
+	/* pcie core supports in direct access to config space */
+	u32 configaddr;	/* pcie config space access: Address field: 0x120 */
+	u32 configdata;	/* pcie config space access: Data field: 0x124 */
+
+	/* mdio access to serdes */
+	u32 mdiocontrol;	/* controls the mdio access: 0x128 */
+	u32 mdiodata;		/* Data to the mdio access: 0x12c */
+
+	/* pcie protocol phy/dllp/tlp register indirect access mechanism */
+	u32 pcieindaddr;	/* indirect access to
+				 * the internal register: 0x130
+				 */
+	u32 pcieinddata;	/* Data to/from the internal regsiter: 0x134 */
+
+	u32 clkreqenctrl;	/* >= rev 6, Clkreq rdma control : 0x138 */
+	u32 PAD[177];
+	u32 pciecfg[4][64];	/* 0x400 - 0x7FF, PCIE Cfg Space */
+	u16 sprom[64];		/* SPROM shadow Area */
+};
+
+struct pcicore_info {
+	union {
+		struct sbpcieregs __iomem *pcieregs;
+		struct sbpciregs __iomem *pciregs;
+	} regs;			/* Memory mapped register to the core */
+
+	struct si_pub *sih;	/* System interconnect handle */
+	struct pci_dev *dev;
+	u8 pciecap_lcreg_offset;/* PCIE capability LCreg offset
+				 * in the config space
+				 */
+	bool pcie_pr42767;
+	u8 pcie_polarity;
+	u8 pcie_war_aspm_ovr;	/* Override ASPM/Clkreq settings */
+
+	u8 pmecap_offset;	/* PM Capability offset in the config space */
+	bool pmecap;		/* Capable of generating PME */
+};
+
+#define PCIE_ASPM(sih)							\
+	(((sih)->buscoretype == PCIE_CORE_ID) &&			\
+	 (((sih)->buscorerev >= 3) &&					\
+	  ((sih)->buscorerev <= 5)))
+
+
+/* delay needed between the mdio control/ mdiodata register data access */
+static void pr28829_delay(void)
+{
+	udelay(10);
+}
+
+/* Initialize the PCI core.
+ * It's caller's responsibility to make sure that this is done only once
+ */
+struct pcicore_info *pcicore_init(struct si_pub *sih, struct pci_dev *pdev,
+				  void __iomem *regs)
+{
+	struct pcicore_info *pi;
+
+	/* alloc struct pcicore_info */
+	pi = kzalloc(sizeof(struct pcicore_info), GFP_ATOMIC);
+	if (pi == NULL)
+		return NULL;
+
+	pi->sih = sih;
+	pi->dev = pdev;
+
+	if (sih->buscoretype == PCIE_CORE_ID) {
+		u8 cap_ptr;
+		pi->regs.pcieregs = regs;
+		cap_ptr = pcicore_find_pci_capability(pi->dev, PCI_CAP_ID_EXP,
+						      NULL, NULL);
+		pi->pciecap_lcreg_offset = cap_ptr + PCIE_CAP_LINKCTRL_OFFSET;
+	} else
+		pi->regs.pciregs = regs;
+
+	return pi;
+}
+
+void pcicore_deinit(struct pcicore_info *pch)
+{
+	kfree(pch);
+}
+
+/* return cap_offset if requested capability exists in the PCI config space */
+/* Note that it's caller's responsibility to make sure it's a pci bus */
+u8
+pcicore_find_pci_capability(struct pci_dev *dev, u8 req_cap_id,
+			    unsigned char *buf, u32 *buflen)
+{
+	u8 cap_id;
+	u8 cap_ptr = 0;
+	u32 bufsize;
+	u8 byte_val;
+
+	/* check for Header type 0 */
+	pci_read_config_byte(dev, PCI_HEADER_TYPE, &byte_val);
+	if ((byte_val & 0x7f) != PCI_HEADER_TYPE_NORMAL)
+		goto end;
+
+	/* check if the capability pointer field exists */
+	pci_read_config_byte(dev, PCI_STATUS, &byte_val);
+	if (!(byte_val & PCI_STATUS_CAP_LIST))
+		goto end;
+
+	pci_read_config_byte(dev, PCI_CAPABILITY_LIST, &cap_ptr);
+	/* check if the capability pointer is 0x00 */
+	if (cap_ptr == 0x00)
+		goto end;
+
+	/* loop thru the capability list
+	 * and see if the pcie capability exists
+	 */
+
+	pci_read_config_byte(dev, cap_ptr, &cap_id);
+
+	while (cap_id != req_cap_id) {
+		pci_read_config_byte(dev, cap_ptr + 1, &cap_ptr);
+		if (cap_ptr == 0x00)
+			break;
+		pci_read_config_byte(dev, cap_ptr, &cap_id);
+	}
+	if (cap_id != req_cap_id)
+		goto end;
+
+	/* found the caller requested capability */
+	if (buf != NULL && buflen != NULL) {
+		u8 cap_data;
+
+		bufsize = *buflen;
+		if (!bufsize)
+			goto end;
+		*buflen = 0;
+		/* copy the capability data excluding cap ID and next ptr */
+		cap_data = cap_ptr + 2;
+		if ((bufsize + cap_data) > PCI_SZPCR)
+			bufsize = PCI_SZPCR - cap_data;
+		*buflen = bufsize;
+		while (bufsize--) {
+			pci_read_config_byte(dev, cap_data, buf);
+			cap_data++;
+			buf++;
+		}
+	}
+end:
+	return cap_ptr;
+}
+
+/* ***** Register Access API */
+static uint
+pcie_readreg(struct sbpcieregs __iomem *pcieregs, uint addrtype, uint offset)
+{
+	uint retval = 0xFFFFFFFF;
+
+	switch (addrtype) {
+	case PCIE_CONFIGREGS:
+		W_REG(&pcieregs->configaddr, offset);
+		(void)R_REG((&pcieregs->configaddr));
+		retval = R_REG(&pcieregs->configdata);
+		break;
+	case PCIE_PCIEREGS:
+		W_REG(&pcieregs->pcieindaddr, offset);
+		(void)R_REG(&pcieregs->pcieindaddr);
+		retval = R_REG(&pcieregs->pcieinddata);
+		break;
+	}
+
+	return retval;
+}
+
+static uint pcie_writereg(struct sbpcieregs __iomem *pcieregs, uint addrtype,
+			  uint offset, uint val)
+{
+	switch (addrtype) {
+	case PCIE_CONFIGREGS:
+		W_REG((&pcieregs->configaddr), offset);
+		W_REG((&pcieregs->configdata), val);
+		break;
+	case PCIE_PCIEREGS:
+		W_REG((&pcieregs->pcieindaddr), offset);
+		W_REG((&pcieregs->pcieinddata), val);
+		break;
+	default:
+		break;
+	}
+	return 0;
+}
+
+static bool pcie_mdiosetblock(struct pcicore_info *pi, uint blk)
+{
+	struct sbpcieregs __iomem *pcieregs = pi->regs.pcieregs;
+	uint mdiodata, i = 0;
+	uint pcie_serdes_spinwait = 200;
+
+	mdiodata = (MDIODATA_START | MDIODATA_WRITE | MDIODATA_TA |
+		    (MDIODATA_DEV_ADDR << MDIODATA_DEVADDR_SHF) |
+		    (MDIODATA_BLK_ADDR << MDIODATA_REGADDR_SHF) |
+		    (blk << 4));
+	W_REG(&pcieregs->mdiodata, mdiodata);
+
+	pr28829_delay();
+	/* retry till the transaction is complete */
+	while (i < pcie_serdes_spinwait) {
+		if (R_REG(&pcieregs->mdiocontrol) & MDIOCTL_ACCESS_DONE)
+			break;
+
+		udelay(1000);
+		i++;
+	}
+
+	if (i >= pcie_serdes_spinwait)
+		return false;
+
+	return true;
+}
+
+static int
+pcie_mdioop(struct pcicore_info *pi, uint physmedia, uint regaddr, bool write,
+	    uint *val)
+{
+	struct sbpcieregs __iomem *pcieregs = pi->regs.pcieregs;
+	uint mdiodata;
+	uint i = 0;
+	uint pcie_serdes_spinwait = 10;
+
+	/* enable mdio access to SERDES */
+	W_REG(&pcieregs->mdiocontrol, MDIOCTL_PREAM_EN | MDIOCTL_DIVISOR_VAL);
+
+	if (pi->sih->buscorerev >= 10) {
+		/* new serdes is slower in rw,
+		 * using two layers of reg address mapping
+		 */
+		if (!pcie_mdiosetblock(pi, physmedia))
+			return 1;
+		mdiodata = ((MDIODATA_DEV_ADDR << MDIODATA_DEVADDR_SHF) |
+			    (regaddr << MDIODATA_REGADDR_SHF));
+		pcie_serdes_spinwait *= 20;
+	} else {
+		mdiodata = ((physmedia << MDIODATA_DEVADDR_SHF_OLD) |
+			    (regaddr << MDIODATA_REGADDR_SHF_OLD));
+	}
+
+	if (!write)
+		mdiodata |= (MDIODATA_START | MDIODATA_READ | MDIODATA_TA);
+	else
+		mdiodata |= (MDIODATA_START | MDIODATA_WRITE | MDIODATA_TA |
+			     *val);
+
+	W_REG(&pcieregs->mdiodata, mdiodata);
+
+	pr28829_delay();
+
+	/* retry till the transaction is complete */
+	while (i < pcie_serdes_spinwait) {
+		if (R_REG(&pcieregs->mdiocontrol) & MDIOCTL_ACCESS_DONE) {
+			if (!write) {
+				pr28829_delay();
+				*val = (R_REG(&pcieregs->mdiodata) &
+					MDIODATA_MASK);
+			}
+			/* Disable mdio access to SERDES */
+			W_REG(&pcieregs->mdiocontrol, 0);
+			return 0;
+		}
+		udelay(1000);
+		i++;
+	}
+
+	/* Timed out. Disable mdio access to SERDES. */
+	W_REG(&pcieregs->mdiocontrol, 0);
+	return 1;
+}
+
+/* use the mdio interface to read from mdio slaves */
+static int
+pcie_mdioread(struct pcicore_info *pi, uint physmedia, uint regaddr,
+	      uint *regval)
+{
+	return pcie_mdioop(pi, physmedia, regaddr, false, regval);
+}
+
+/* use the mdio interface to write to mdio slaves */
+static int
+pcie_mdiowrite(struct pcicore_info *pi, uint physmedia, uint regaddr, uint val)
+{
+	return pcie_mdioop(pi, physmedia, regaddr, true, &val);
+}
+
+/* ***** Support functions ***** */
+static u8 pcie_clkreq(struct pcicore_info *pi, u32 mask, u32 val)
+{
+	u32 reg_val;
+	u8 offset;
+
+	offset = pi->pciecap_lcreg_offset;
+	if (!offset)
+		return 0;
+
+	pci_read_config_dword(pi->dev, offset, &reg_val);
+	/* set operation */
+	if (mask) {
+		if (val)
+			reg_val |= PCIE_CLKREQ_ENAB;
+		else
+			reg_val &= ~PCIE_CLKREQ_ENAB;
+		pci_write_config_dword(pi->dev, offset, reg_val);
+		pci_read_config_dword(pi->dev, offset, &reg_val);
+	}
+	if (reg_val & PCIE_CLKREQ_ENAB)
+		return 1;
+	else
+		return 0;
+}
+
+static void pcie_extendL1timer(struct pcicore_info *pi, bool extend)
+{
+	u32 w;
+	struct si_pub *sih = pi->sih;
+	struct sbpcieregs __iomem *pcieregs = pi->regs.pcieregs;
+
+	if (sih->buscoretype != PCIE_CORE_ID || sih->buscorerev < 7)
+		return;
+
+	w = pcie_readreg(pcieregs, PCIE_PCIEREGS, PCIE_DLLP_PMTHRESHREG);
+	if (extend)
+		w |= PCIE_ASPMTIMER_EXTEND;
+	else
+		w &= ~PCIE_ASPMTIMER_EXTEND;
+	pcie_writereg(pcieregs, PCIE_PCIEREGS, PCIE_DLLP_PMTHRESHREG, w);
+	w = pcie_readreg(pcieregs, PCIE_PCIEREGS, PCIE_DLLP_PMTHRESHREG);
+}
+
+/* centralized clkreq control policy */
+static void pcie_clkreq_upd(struct pcicore_info *pi, uint state)
+{
+	struct si_pub *sih = pi->sih;
+
+	switch (state) {
+	case SI_DOATTACH:
+		if (PCIE_ASPM(sih))
+			pcie_clkreq(pi, 1, 0);
+		break;
+	case SI_PCIDOWN:
+		if (sih->buscorerev == 6) {	/* turn on serdes PLL down */
+			ai_corereg(sih, SI_CC_IDX,
+				   offsetof(struct chipcregs, chipcontrol_addr),
+				   ~0, 0);
+			ai_corereg(sih, SI_CC_IDX,
+				   offsetof(struct chipcregs, chipcontrol_data),
+				   ~0x40, 0);
+		} else if (pi->pcie_pr42767) {
+			pcie_clkreq(pi, 1, 1);
+		}
+		break;
+	case SI_PCIUP:
+		if (sih->buscorerev == 6) {	/* turn off serdes PLL down */
+			ai_corereg(sih, SI_CC_IDX,
+				   offsetof(struct chipcregs, chipcontrol_addr),
+				   ~0, 0);
+			ai_corereg(sih, SI_CC_IDX,
+				   offsetof(struct chipcregs, chipcontrol_data),
+				   ~0x40, 0x40);
+		} else if (PCIE_ASPM(sih)) {	/* disable clkreq */
+			pcie_clkreq(pi, 1, 0);
+		}
+		break;
+	}
+}
+
+/* ***** PCI core WARs ***** */
+/* Done only once at attach time */
+static void pcie_war_polarity(struct pcicore_info *pi)
+{
+	u32 w;
+
+	if (pi->pcie_polarity != 0)
+		return;
+
+	w = pcie_readreg(pi->regs.pcieregs, PCIE_PCIEREGS, PCIE_PLP_STATUSREG);
+
+	/* Detect the current polarity at attach and force that polarity and
+	 * disable changing the polarity
+	 */
+	if ((w & PCIE_PLP_POLARITYINV_STAT) == 0)
+		pi->pcie_polarity = SERDES_RX_CTRL_FORCE;
+	else
+		pi->pcie_polarity = (SERDES_RX_CTRL_FORCE |
+				     SERDES_RX_CTRL_POLARITY);
+}
+
+/* enable ASPM and CLKREQ if srom doesn't have it */
+/* Needs to happen when update to shadow SROM is needed
+ *   : Coming out of 'standby'/'hibernate'
+ *   : If pcie_war_aspm_ovr state changed
+ */
+static void pcie_war_aspm_clkreq(struct pcicore_info *pi)
+{
+	struct sbpcieregs __iomem *pcieregs = pi->regs.pcieregs;
+	struct si_pub *sih = pi->sih;
+	u16 val16;
+	u16 __iomem *reg16;
+	u32 w;
+
+	if (!PCIE_ASPM(sih))
+		return;
+
+	/* bypass this on QT or VSIM */
+	reg16 = &pcieregs->sprom[SRSH_ASPM_OFFSET];
+	val16 = R_REG(reg16);
+
+	val16 &= ~SRSH_ASPM_ENB;
+	if (pi->pcie_war_aspm_ovr == PCIE_ASPM_ENAB)
+		val16 |= SRSH_ASPM_ENB;
+	else if (pi->pcie_war_aspm_ovr == PCIE_ASPM_L1_ENAB)
+		val16 |= SRSH_ASPM_L1_ENB;
+	else if (pi->pcie_war_aspm_ovr == PCIE_ASPM_L0s_ENAB)
+		val16 |= SRSH_ASPM_L0s_ENB;
+
+	W_REG(reg16, val16);
+
+	pci_read_config_dword(pi->dev, pi->pciecap_lcreg_offset, &w);
+	w &= ~PCIE_ASPM_ENAB;
+	w |= pi->pcie_war_aspm_ovr;
+	pci_write_config_dword(pi->dev, pi->pciecap_lcreg_offset, w);
+
+	reg16 = &pcieregs->sprom[SRSH_CLKREQ_OFFSET_REV5];
+	val16 = R_REG(reg16);
+
+	if (pi->pcie_war_aspm_ovr != PCIE_ASPM_DISAB) {
+		val16 |= SRSH_CLKREQ_ENB;
+		pi->pcie_pr42767 = true;
+	} else
+		val16 &= ~SRSH_CLKREQ_ENB;
+
+	W_REG(reg16, val16);
+}
+
+/* Apply the polarity determined at the start */
+/* Needs to happen when coming out of 'standby'/'hibernate' */
+static void pcie_war_serdes(struct pcicore_info *pi)
+{
+	u32 w = 0;
+
+	if (pi->pcie_polarity != 0)
+		pcie_mdiowrite(pi, MDIODATA_DEV_RX, SERDES_RX_CTRL,
+			       pi->pcie_polarity);
+
+	pcie_mdioread(pi, MDIODATA_DEV_PLL, SERDES_PLL_CTRL, &w);
+	if (w & PLL_CTRL_FREQDET_EN) {
+		w &= ~PLL_CTRL_FREQDET_EN;
+		pcie_mdiowrite(pi, MDIODATA_DEV_PLL, SERDES_PLL_CTRL, w);
+	}
+}
+
+/* Fix MISC config to allow coming out of L2/L3-Ready state w/o PRST */
+/* Needs to happen when coming out of 'standby'/'hibernate' */
+static void pcie_misc_config_fixup(struct pcicore_info *pi)
+{
+	struct sbpcieregs __iomem *pcieregs = pi->regs.pcieregs;
+	u16 val16;
+	u16 __iomem *reg16;
+
+	reg16 = &pcieregs->sprom[SRSH_PCIE_MISC_CONFIG];
+	val16 = R_REG(reg16);
+
+	if ((val16 & SRSH_L23READY_EXIT_NOPERST) == 0) {
+		val16 |= SRSH_L23READY_EXIT_NOPERST;
+		W_REG(reg16, val16);
+	}
+}
+
+/* quick hack for testing */
+/* Needs to happen when coming out of 'standby'/'hibernate' */
+static void pcie_war_noplldown(struct pcicore_info *pi)
+{
+	struct sbpcieregs __iomem *pcieregs = pi->regs.pcieregs;
+	u16 __iomem *reg16;
+
+	/* turn off serdes PLL down */
+	ai_corereg(pi->sih, SI_CC_IDX, offsetof(struct chipcregs, chipcontrol),
+		   CHIPCTRL_4321_PLL_DOWN, CHIPCTRL_4321_PLL_DOWN);
+
+	/* clear srom shadow backdoor */
+	reg16 = &pcieregs->sprom[SRSH_BD_OFFSET];
+	W_REG(reg16, 0);
+}
+
+/* Needs to happen when coming out of 'standby'/'hibernate' */
+static void pcie_war_pci_setup(struct pcicore_info *pi)
+{
+	struct si_pub *sih = pi->sih;
+	struct sbpcieregs __iomem *pcieregs = pi->regs.pcieregs;
+	u32 w;
+
+	if (sih->buscorerev == 0 || sih->buscorerev == 1) {
+		w = pcie_readreg(pcieregs, PCIE_PCIEREGS,
+				 PCIE_TLP_WORKAROUNDSREG);
+		w |= 0x8;
+		pcie_writereg(pcieregs, PCIE_PCIEREGS,
+			      PCIE_TLP_WORKAROUNDSREG, w);
+	}
+
+	if (sih->buscorerev == 1) {
+		w = pcie_readreg(pcieregs, PCIE_PCIEREGS, PCIE_DLLP_LCREG);
+		w |= 0x40;
+		pcie_writereg(pcieregs, PCIE_PCIEREGS, PCIE_DLLP_LCREG, w);
+	}
+
+	if (sih->buscorerev == 0) {
+		pcie_mdiowrite(pi, MDIODATA_DEV_RX, SERDES_RX_TIMER1, 0x8128);
+		pcie_mdiowrite(pi, MDIODATA_DEV_RX, SERDES_RX_CDR, 0x0100);
+		pcie_mdiowrite(pi, MDIODATA_DEV_RX, SERDES_RX_CDRBW, 0x1466);
+	} else if (PCIE_ASPM(sih)) {
+		/* Change the L1 threshold for better performance */
+		w = pcie_readreg(pcieregs, PCIE_PCIEREGS,
+				 PCIE_DLLP_PMTHRESHREG);
+		w &= ~PCIE_L1THRESHOLDTIME_MASK;
+		w |= PCIE_L1THRESHOLD_WARVAL << PCIE_L1THRESHOLDTIME_SHIFT;
+		pcie_writereg(pcieregs, PCIE_PCIEREGS,
+			      PCIE_DLLP_PMTHRESHREG, w);
+
+		pcie_war_serdes(pi);
+
+		pcie_war_aspm_clkreq(pi);
+	} else if (pi->sih->buscorerev == 7)
+		pcie_war_noplldown(pi);
+
+	/* Note that the fix is actually in the SROM,
+	 * that's why this is open-ended
+	 */
+	if (pi->sih->buscorerev >= 6)
+		pcie_misc_config_fixup(pi);
+}
+
+/* ***** Functions called during driver state changes ***** */
+void pcicore_attach(struct pcicore_info *pi, int state)
+{
+	struct si_pub *sih = pi->sih;
+	u32 bfl2 = (u32)getintvar(sih, BRCMS_SROM_BOARDFLAGS2);
+
+	/* Determine if this board needs override */
+	if (PCIE_ASPM(sih)) {
+		if (bfl2 & BFL2_PCIEWAR_OVR)
+			pi->pcie_war_aspm_ovr = PCIE_ASPM_DISAB;
+		else
+			pi->pcie_war_aspm_ovr = PCIE_ASPM_ENAB;
+	}
+
+	/* These need to happen in this order only */
+	pcie_war_polarity(pi);
+
+	pcie_war_serdes(pi);
+
+	pcie_war_aspm_clkreq(pi);
+
+	pcie_clkreq_upd(pi, state);
+
+}
+
+void pcicore_hwup(struct pcicore_info *pi)
+{
+	if (!pi || pi->sih->buscoretype != PCIE_CORE_ID)
+		return;
+
+	pcie_war_pci_setup(pi);
+}
+
+void pcicore_up(struct pcicore_info *pi, int state)
+{
+	if (!pi || pi->sih->buscoretype != PCIE_CORE_ID)
+		return;
+
+	/* Restore L1 timer for better performance */
+	pcie_extendL1timer(pi, true);
+
+	pcie_clkreq_upd(pi, state);
+}
+
+/* When the device is going to enter D3 state
+ * (or the system is going to enter S3/S4 states)
+ */
+void pcicore_sleep(struct pcicore_info *pi)
+{
+	u32 w;
+
+	if (!pi || !PCIE_ASPM(pi->sih))
+		return;
+
+	pci_read_config_dword(pi->dev, pi->pciecap_lcreg_offset, &w);
+	w &= ~PCIE_CAP_LCREG_ASPML1;
+	pci_write_config_dword(pi->dev, pi->pciecap_lcreg_offset, w);
+
+	pi->pcie_pr42767 = false;
+}
+
+void pcicore_down(struct pcicore_info *pi, int state)
+{
+	if (!pi || pi->sih->buscoretype != PCIE_CORE_ID)
+		return;
+
+	pcie_clkreq_upd(pi, state);
+
+	/* Reduce L1 timer for better power savings */
+	pcie_extendL1timer(pi, false);
+}
+
+/* precondition: current core is sii->buscoretype */
+static void pcicore_fixcfg(struct pcicore_info *pi, u16 __iomem *reg16)
+{
+	struct si_info *sii = (struct si_info *)(pi->sih);
+	u16 val16;
+	uint pciidx;
+
+	pciidx = ai_coreidx(&sii->pub);
+	val16 = R_REG(reg16);
+	if (((val16 & SRSH_PI_MASK) >> SRSH_PI_SHIFT) != (u16)pciidx) {
+		val16 = (u16)(pciidx << SRSH_PI_SHIFT) |
+			(val16 & ~SRSH_PI_MASK);
+		W_REG(reg16, val16);
+	}
+}
+
+void
+pcicore_fixcfg_pci(struct pcicore_info *pi, struct sbpciregs __iomem *pciregs)
+{
+	pcicore_fixcfg(pi, &pciregs->sprom[SRSH_PI_OFFSET]);
+}
+
+void pcicore_fixcfg_pcie(struct pcicore_info *pi,
+			 struct sbpcieregs __iomem *pcieregs)
+{
+	pcicore_fixcfg(pi, &pcieregs->sprom[SRSH_PI_OFFSET]);
+}
+
+/* precondition: current core is pci core */
+void
+pcicore_pci_setup(struct pcicore_info *pi, struct sbpciregs __iomem *pciregs)
+{
+	u32 w;
+
+	OR_REG(&pciregs->sbtopci2, SBTOPCI_PREF | SBTOPCI_BURST);
+
+	if (((struct si_info *)(pi->sih))->pub.buscorerev >= 11) {
+		OR_REG(&pciregs->sbtopci2, SBTOPCI_RC_READMULTI);
+		w = R_REG(&pciregs->clkrun);
+		W_REG(&pciregs->clkrun, w | PCI_CLKRUN_DSBL);
+		w = R_REG(&pciregs->clkrun);
+	}
+}