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OpenCloudOS-Kernel/drivers/net/wireless/brcm80211/brcmsmac/nicpci.c

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/*
* 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) \
((ai_get_buscoretype(sih) == PCIE_CORE_ID) && \
((ai_get_buscorerev(sih) >= 3) && \
(ai_get_buscorerev(sih) <= 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 (ai_get_buscoretype(sih) == 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 (ai_get_buscoretype(sih) != PCIE_CORE_ID ||
ai_get_buscorerev(sih) < 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:
/* turn on serdes PLL down */
if (ai_get_buscorerev(sih) == 6) {
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:
/* turn off serdes PLL down */
if (ai_get_buscorerev(sih) == 6) {
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 (ai_get_buscorerev(sih) == 0 || ai_get_buscorerev(sih) == 1) {
w = pcie_readreg(pcieregs, PCIE_PCIEREGS,
PCIE_TLP_WORKAROUNDSREG);
w |= 0x8;
pcie_writereg(pcieregs, PCIE_PCIEREGS,
PCIE_TLP_WORKAROUNDSREG, w);
}
if (ai_get_buscorerev(sih) == 1) {
w = pcie_readreg(pcieregs, PCIE_PCIEREGS, PCIE_DLLP_LCREG);
w |= 0x40;
pcie_writereg(pcieregs, PCIE_PCIEREGS, PCIE_DLLP_LCREG, w);
}
if (ai_get_buscorerev(sih) == 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 (ai_get_buscorerev(pi->sih) == 7)
pcie_war_noplldown(pi);
/* Note that the fix is actually in the SROM,
* that's why this is open-ended
*/
if (ai_get_buscorerev(pi->sih) >= 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 || ai_get_buscoretype(pi->sih) != PCIE_CORE_ID)
return;
pcie_war_pci_setup(pi);
}
void pcicore_up(struct pcicore_info *pi, int state)
{
if (!pi || ai_get_buscoretype(pi->sih) != 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 || ai_get_buscoretype(pi->sih) != 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 (ai_get_buscorerev(pi->sih) >= 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);
}
}
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