diff options
Diffstat (limited to 'drivers/staging/brcm80211/util/nicpci.c')
| -rw-r--r-- | drivers/staging/brcm80211/util/nicpci.c | 880 |
1 files changed, 880 insertions, 0 deletions
diff --git a/drivers/staging/brcm80211/util/nicpci.c b/drivers/staging/brcm80211/util/nicpci.c new file mode 100644 index 000000000000..feaa54ffa35b --- /dev/null +++ b/drivers/staging/brcm80211/util/nicpci.c @@ -0,0 +1,880 @@ +/* + * 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 <typedefs.h> +#include <bcmdefs.h> +#include <osl.h> +#include <bcmutils.h> +#include <siutils.h> +#include <hndsoc.h> +#include <bcmdevs.h> +#include <sbchipc.h> +#include <pci_core.h> +#include <pcie_core.h> +#include <nicpci.h> +#include <pcicfg.h> + +typedef struct { + union { + sbpcieregs_t *pcieregs; + sbpciregs_t *pciregs; + } regs; /* Memory mapped register to the core */ + + si_t *sih; /* System interconnect handle */ + osl_t *osh; /* OSL handle */ + uint8 pciecap_lcreg_offset; /* PCIE capability LCreg offset in the config space */ + bool pcie_pr42767; + uint8 pcie_polarity; + uint8 pcie_war_aspm_ovr; /* Override ASPM/Clkreq settings */ + + uint8 pmecap_offset; /* PM Capability offset in the config space */ + bool pmecap; /* Capable of generating PME */ +} pcicore_info_t; + +/* debug/trace */ +#define PCI_ERROR(args) +#define PCIE_PUB(sih) ((BUSTYPE((sih)->bustype) == PCI_BUS) && ((sih)->buscoretype == PCIE_CORE_ID)) + +/* routines to access mdio slave device registers */ +static bool pcie_mdiosetblock(pcicore_info_t * pi, uint blk); +static int pcie_mdioop(pcicore_info_t * pi, uint physmedia, uint regaddr, + bool write, uint * val); +static int pcie_mdiowrite(pcicore_info_t * pi, uint physmedia, uint readdr, + uint val); +static int pcie_mdioread(pcicore_info_t * pi, uint physmedia, uint readdr, + uint * ret_val); + +static void pcie_extendL1timer(pcicore_info_t * pi, bool extend); +static void pcie_clkreq_upd(pcicore_info_t * pi, uint state); + +static void pcie_war_aspm_clkreq(pcicore_info_t * pi); +static void pcie_war_serdes(pcicore_info_t * pi); +static void pcie_war_noplldown(pcicore_info_t * pi); +static void pcie_war_polarity(pcicore_info_t * pi); +static void pcie_war_pci_setup(pcicore_info_t * pi); + +static bool pcicore_pmecap(pcicore_info_t * pi); + +#define PCIE_ASPM(sih) ((PCIE_PUB(sih)) && (((sih)->buscorerev >= 3) && ((sih)->buscorerev <= 5))) + +#define DWORD_ALIGN(x) (x & ~(0x03)) +#define BYTE_POS(x) (x & 0x3) +#define WORD_POS(x) (x & 0x1) + +#define BYTE_SHIFT(x) (8 * BYTE_POS(x)) +#define WORD_SHIFT(x) (16 * WORD_POS(x)) + +#define BYTE_VAL(a, x) ((a >> BYTE_SHIFT(x)) & 0xFF) +#define WORD_VAL(a, x) ((a >> WORD_SHIFT(x)) & 0xFFFF) + +#define read_pci_cfg_byte(a) \ + (BYTE_VAL(OSL_PCI_READ_CONFIG(osh, DWORD_ALIGN(a), 4), a) & 0xff) + +#define read_pci_cfg_word(a) \ + (WORD_VAL(OSL_PCI_READ_CONFIG(osh, DWORD_ALIGN(a), 4), a) & 0xffff) + +#define write_pci_cfg_byte(a, val) do { \ + uint32 tmpval; \ + tmpval = (OSL_PCI_READ_CONFIG(osh, DWORD_ALIGN(a), 4) & ~0xFF << BYTE_POS(a)) | \ + val << BYTE_POS(a); \ + OSL_PCI_WRITE_CONFIG(osh, DWORD_ALIGN(a), 4, tmpval); \ + } while (0) + +#define write_pci_cfg_word(a, val) do { \ + uint32 tmpval; \ + tmpval = (OSL_PCI_READ_CONFIG(osh, DWORD_ALIGN(a), 4) & ~0xFFFF << WORD_POS(a)) | \ + val << WORD_POS(a); \ + OSL_PCI_WRITE_CONFIG(osh, DWORD_ALIGN(a), 4, tmpval); \ + } while (0) + +/* delay needed between the mdio control/ mdiodata register data access */ +#define PR28829_DELAY() OSL_DELAY(10) + +/* Initialize the PCI core. It's caller's responsibility to make sure that this is done + * only once + */ +void *pcicore_init(si_t * sih, osl_t * osh, void *regs) +{ + pcicore_info_t *pi; + + ASSERT(sih->bustype == PCI_BUS); + + /* alloc pcicore_info_t */ + if ((pi = MALLOC(osh, sizeof(pcicore_info_t))) == NULL) { + PCI_ERROR(("pci_attach: malloc failed! malloced %d bytes\n", + MALLOCED(osh))); + return (NULL); + } + + bzero(pi, sizeof(pcicore_info_t)); + + pi->sih = sih; + pi->osh = osh; + + if (sih->buscoretype == PCIE_CORE_ID) { + uint8 cap_ptr; + pi->regs.pcieregs = (sbpcieregs_t *) regs; + cap_ptr = + pcicore_find_pci_capability(pi->osh, PCI_CAP_PCIECAP_ID, + NULL, NULL); + ASSERT(cap_ptr); + pi->pciecap_lcreg_offset = cap_ptr + PCIE_CAP_LINKCTRL_OFFSET; + } else + pi->regs.pciregs = (sbpciregs_t *) regs; + + return pi; +} + +void pcicore_deinit(void *pch) +{ + pcicore_info_t *pi = (pcicore_info_t *) pch; + + if (pi == NULL) + return; + MFREE(pi->osh, pi, sizeof(pcicore_info_t)); +} + +/* 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 */ +uint8 +pcicore_find_pci_capability(osl_t * osh, uint8 req_cap_id, uchar * buf, + uint32 * buflen) +{ + uint8 cap_id; + uint8 cap_ptr = 0; + uint32 bufsize; + uint8 byte_val; + + /* check for Header type 0 */ + byte_val = read_pci_cfg_byte(PCI_CFG_HDR); + if ((byte_val & 0x7f) != PCI_HEADER_NORMAL) + goto end; + + /* check if the capability pointer field exists */ + byte_val = read_pci_cfg_byte(PCI_CFG_STAT); + if (!(byte_val & PCI_CAPPTR_PRESENT)) + goto end; + + cap_ptr = read_pci_cfg_byte(PCI_CFG_CAPPTR); + /* check if the capability pointer is 0x00 */ + if (cap_ptr == 0x00) + goto end; + + /* loop thr'u the capability list and see if the pcie capabilty exists */ + + cap_id = read_pci_cfg_byte(cap_ptr); + + while (cap_id != req_cap_id) { + cap_ptr = read_pci_cfg_byte((cap_ptr + 1)); + if (cap_ptr == 0x00) + break; + cap_id = read_pci_cfg_byte(cap_ptr); + } + if (cap_id != req_cap_id) { + goto end; + } + /* found the caller requested capability */ + if ((buf != NULL) && (buflen != NULL)) { + uint8 cap_data; + + bufsize = *buflen; + if (!bufsize) + goto end; + *buflen = 0; + /* copy the cpability data excluding cap ID and next ptr */ + cap_data = cap_ptr + 2; + if ((bufsize + cap_data) > SZPCR) + bufsize = SZPCR - cap_data; + *buflen = bufsize; + while (bufsize--) { + *buf = read_pci_cfg_byte(cap_data); + cap_data++; + buf++; + } + } + end: + return cap_ptr; +} + +/* ***** Register Access API */ +uint +pcie_readreg(osl_t * osh, sbpcieregs_t * pcieregs, uint addrtype, uint offset) +{ + uint retval = 0xFFFFFFFF; + + ASSERT(pcieregs != NULL); + + switch (addrtype) { + case PCIE_CONFIGREGS: + W_REG(osh, (&pcieregs->configaddr), offset); + (void)R_REG(osh, (&pcieregs->configaddr)); + retval = R_REG(osh, &(pcieregs->configdata)); + break; + case PCIE_PCIEREGS: + W_REG(osh, &(pcieregs->pcieindaddr), offset); + (void)R_REG(osh, (&pcieregs->pcieindaddr)); + retval = R_REG(osh, &(pcieregs->pcieinddata)); + break; + default: + ASSERT(0); + break; + } + + return retval; +} + +uint +pcie_writereg(osl_t * osh, sbpcieregs_t * pcieregs, uint addrtype, uint offset, + uint val) +{ + ASSERT(pcieregs != NULL); + + switch (addrtype) { + case PCIE_CONFIGREGS: + W_REG(osh, (&pcieregs->configaddr), offset); + W_REG(osh, (&pcieregs->configdata), val); + break; + case PCIE_PCIEREGS: + W_REG(osh, (&pcieregs->pcieindaddr), offset); + W_REG(osh, (&pcieregs->pcieinddata), val); + break; + default: + ASSERT(0); + break; + } + return 0; +} + +static bool pcie_mdiosetblock(pcicore_info_t * pi, uint blk) +{ + sbpcieregs_t *pcieregs = pi->regs.pcieregs; + uint mdiodata, i = 0; + uint pcie_serdes_spinwait = 200; + + mdiodata = + MDIODATA_START | MDIODATA_WRITE | (MDIODATA_DEV_ADDR << + MDIODATA_DEVADDR_SHF) | + (MDIODATA_BLK_ADDR << MDIODATA_REGADDR_SHF) | MDIODATA_TA | (blk << + 4); + W_REG(pi->osh, &pcieregs->mdiodata, mdiodata); + + PR28829_DELAY(); + /* retry till the transaction is complete */ + while (i < pcie_serdes_spinwait) { + if (R_REG(pi->osh, &(pcieregs->mdiocontrol)) & + MDIOCTL_ACCESS_DONE) { + break; + } + OSL_DELAY(1000); + i++; + } + + if (i >= pcie_serdes_spinwait) { + PCI_ERROR(("pcie_mdiosetblock: timed out\n")); + return FALSE; + } + + return TRUE; +} + +static int +pcie_mdioop(pcicore_info_t * pi, uint physmedia, uint regaddr, bool write, + uint * val) +{ + sbpcieregs_t *pcieregs = pi->regs.pcieregs; + uint mdiodata; + uint i = 0; + uint pcie_serdes_spinwait = 10; + + /* enable mdio access to SERDES */ + W_REG(pi->osh, (&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(pi->osh, &pcieregs->mdiodata, mdiodata); + + PR28829_DELAY(); + + /* retry till the transaction is complete */ + while (i < pcie_serdes_spinwait) { + if (R_REG(pi->osh, &(pcieregs->mdiocontrol)) & + MDIOCTL_ACCESS_DONE) { + if (!write) { + PR28829_DELAY(); + *val = + (R_REG(pi->osh, &(pcieregs->mdiodata)) & + MDIODATA_MASK); + } + /* Disable mdio access to SERDES */ + W_REG(pi->osh, (&pcieregs->mdiocontrol), 0); + return 0; + } + OSL_DELAY(1000); + i++; + } + + PCI_ERROR(("pcie_mdioop: timed out op: %d\n", write)); + /* Disable mdio access to SERDES */ + W_REG(pi->osh, (&pcieregs->mdiocontrol), 0); + return 1; +} + +/* use the mdio interface to read from mdio slaves */ +static int +pcie_mdioread(pcicore_info_t * 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(pcicore_info_t * pi, uint physmedia, uint regaddr, uint val) +{ + return pcie_mdioop(pi, physmedia, regaddr, TRUE, &val); +} + +/* ***** Support functions ***** */ +uint8 pcie_clkreq(void *pch, uint32 mask, uint32 val) +{ + pcicore_info_t *pi = (pcicore_info_t *) pch; + uint32 reg_val; + uint8 offset; + + offset = pi->pciecap_lcreg_offset; + if (!offset) + return 0; + + reg_val = OSL_PCI_READ_CONFIG(pi->osh, offset, sizeof(uint32)); + /* set operation */ + if (mask) { + if (val) + reg_val |= PCIE_CLKREQ_ENAB; + else + reg_val &= ~PCIE_CLKREQ_ENAB; + OSL_PCI_WRITE_CONFIG(pi->osh, offset, sizeof(uint32), reg_val); + reg_val = OSL_PCI_READ_CONFIG(pi->osh, offset, sizeof(uint32)); + } + if (reg_val & PCIE_CLKREQ_ENAB) + return 1; + else + return 0; +} + +static void pcie_extendL1timer(pcicore_info_t * pi, bool extend) +{ + uint32 w; + si_t *sih = pi->sih; + osl_t *osh = pi->osh; + sbpcieregs_t *pcieregs = pi->regs.pcieregs; + + if (!PCIE_PUB(sih) || sih->buscorerev < 7) + return; + + w = pcie_readreg(osh, pcieregs, PCIE_PCIEREGS, PCIE_DLLP_PMTHRESHREG); + if (extend) + w |= PCIE_ASPMTIMER_EXTEND; + else + w &= ~PCIE_ASPMTIMER_EXTEND; + pcie_writereg(osh, pcieregs, PCIE_PCIEREGS, PCIE_DLLP_PMTHRESHREG, w); + w = pcie_readreg(osh, pcieregs, PCIE_PCIEREGS, PCIE_DLLP_PMTHRESHREG); +} + +/* centralized clkreq control policy */ +static void pcie_clkreq_upd(pcicore_info_t * pi, uint state) +{ + si_t *sih = pi->sih; + ASSERT(PCIE_PUB(sih)); + + switch (state) { + case SI_DOATTACH: + if (PCIE_ASPM(sih)) + pcie_clkreq((void *)pi, 1, 0); + break; + case SI_PCIDOWN: + if (sih->buscorerev == 6) { /* turn on serdes PLL down */ + si_corereg(sih, SI_CC_IDX, + OFFSETOF(chipcregs_t, chipcontrol_addr), ~0, + 0); + si_corereg(sih, SI_CC_IDX, + OFFSETOF(chipcregs_t, chipcontrol_data), + ~0x40, 0); + } else if (pi->pcie_pr42767) { + pcie_clkreq((void *)pi, 1, 1); + } + break; + case SI_PCIUP: + if (sih->buscorerev == 6) { /* turn off serdes PLL down */ + si_corereg(sih, SI_CC_IDX, + OFFSETOF(chipcregs_t, chipcontrol_addr), ~0, + 0); + si_corereg(sih, SI_CC_IDX, + OFFSETOF(chipcregs_t, chipcontrol_data), + ~0x40, 0x40); + } else if (PCIE_ASPM(sih)) { /* disable clkreq */ + pcie_clkreq((void *)pi, 1, 0); + } + break; + default: + ASSERT(0); + break; + } +} + +/* ***** PCI core WARs ***** */ +/* Done only once at attach time */ +static void pcie_war_polarity(pcicore_info_t * pi) +{ + uint32 w; + + if (pi->pcie_polarity != 0) + return; + + w = pcie_readreg(pi->osh, 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(pcicore_info_t * pi) +{ + sbpcieregs_t *pcieregs = pi->regs.pcieregs; + si_t *sih = pi->sih; + uint16 val16, *reg16; + uint32 w; + + if (!PCIE_ASPM(sih)) + return; + + /* bypass this on QT or VSIM */ + if (!ISSIM_ENAB(sih)) { + + reg16 = &pcieregs->sprom[SRSH_ASPM_OFFSET]; + val16 = R_REG(pi->osh, 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(pi->osh, reg16, val16); + + w = OSL_PCI_READ_CONFIG(pi->osh, pi->pciecap_lcreg_offset, + sizeof(uint32)); + w &= ~PCIE_ASPM_ENAB; + w |= pi->pcie_war_aspm_ovr; + OSL_PCI_WRITE_CONFIG(pi->osh, pi->pciecap_lcreg_offset, + sizeof(uint32), w); + } + + reg16 = &pcieregs->sprom[SRSH_CLKREQ_OFFSET_REV5]; + val16 = R_REG(pi->osh, 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(pi->osh, reg16, val16); +} + +/* Apply the polarity determined at the start */ +/* Needs to happen when coming out of 'standby'/'hibernate' */ +static void pcie_war_serdes(pcicore_info_t * pi) +{ + uint32 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 BCMINITFN(pcie_misc_config_fixup) (pcicore_info_t * pi) { + sbpcieregs_t *pcieregs = pi->regs.pcieregs; + uint16 val16, *reg16; + + reg16 = &pcieregs->sprom[SRSH_PCIE_MISC_CONFIG]; + val16 = R_REG(pi->osh, reg16); + + if ((val16 & SRSH_L23READY_EXIT_NOPERST) == 0) { + val16 |= SRSH_L23READY_EXIT_NOPERST; + W_REG(pi->osh, reg16, val16); + } +} + +/* quick hack for testing */ +/* Needs to happen when coming out of 'standby'/'hibernate' */ +static void pcie_war_noplldown(pcicore_info_t * pi) +{ + sbpcieregs_t *pcieregs = pi->regs.pcieregs; + uint16 *reg16; + + ASSERT(pi->sih->buscorerev == 7); + + /* turn off serdes PLL down */ + si_corereg(pi->sih, SI_CC_IDX, OFFSETOF(chipcregs_t, chipcontrol), + CHIPCTRL_4321_PLL_DOWN, CHIPCTRL_4321_PLL_DOWN); + + /* clear srom shadow backdoor */ + reg16 = &pcieregs->sprom[SRSH_BD_OFFSET]; + W_REG(pi->osh, reg16, 0); +} + +/* Needs to happen when coming out of 'standby'/'hibernate' */ +static void pcie_war_pci_setup(pcicore_info_t * pi) +{ + si_t *sih = pi->sih; + osl_t *osh = pi->osh; + sbpcieregs_t *pcieregs = pi->regs.pcieregs; + uint32 w; + + if ((sih->buscorerev == 0) || (sih->buscorerev == 1)) { + w = pcie_readreg(osh, pcieregs, PCIE_PCIEREGS, + PCIE_TLP_WORKAROUNDSREG); + w |= 0x8; + pcie_writereg(osh, pcieregs, PCIE_PCIEREGS, + PCIE_TLP_WORKAROUNDSREG, w); + } + + if (sih->buscorerev == 1) { + w = pcie_readreg(osh, pcieregs, PCIE_PCIEREGS, PCIE_DLLP_LCREG); + w |= (0x40); + pcie_writereg(osh, 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(osh, pcieregs, PCIE_PCIEREGS, + PCIE_DLLP_PMTHRESHREG); + w &= ~(PCIE_L1THRESHOLDTIME_MASK); + w |= (PCIE_L1THRESHOLD_WARVAL << PCIE_L1THRESHOLDTIME_SHIFT); + pcie_writereg(osh, 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); +} + +void pcie_war_ovr_aspm_update(void *pch, uint8 aspm) +{ + pcicore_info_t *pi = (pcicore_info_t *) pch; + + if (!PCIE_ASPM(pi->sih)) + return; + + /* Validate */ + if (aspm > PCIE_ASPM_ENAB) + return; + + pi->pcie_war_aspm_ovr = aspm; + + /* Update the current state */ + pcie_war_aspm_clkreq(pi); +} + +/* ***** Functions called during driver state changes ***** */ +void BCMATTACHFN(pcicore_attach) (void *pch, char *pvars, int state) { + pcicore_info_t *pi = (pcicore_info_t *) pch; + si_t *sih = pi->sih; + + /* Determine if this board needs override */ + if (PCIE_ASPM(sih)) { + if ((uint32) getintvar(pvars, "boardflags2") & 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(void *pch) +{ + pcicore_info_t *pi = (pcicore_info_t *) pch; + + if (!pi || !PCIE_PUB(pi->sih)) + return; + + pcie_war_pci_setup(pi); +} + +void pcicore_up(void *pch, int state) +{ + pcicore_info_t *pi = (pcicore_info_t *) pch; + + if (!pi || !PCIE_PUB(pi->sih)) + 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(void *pch) +{ + pcicore_info_t *pi = (pcicore_info_t *) pch; + uint32 w; + + if (!pi || !PCIE_ASPM(pi->sih)) + return; + + w = OSL_PCI_READ_CONFIG(pi->osh, pi->pciecap_lcreg_offset, + sizeof(uint32)); + w &= ~PCIE_CAP_LCREG_ASPML1; + OSL_PCI_WRITE_CONFIG(pi->osh, pi->pciecap_lcreg_offset, sizeof(uint32), + w); + + pi->pcie_pr42767 = FALSE; +} + +void pcicore_down(void *pch, int state) +{ + pcicore_info_t *pi = (pcicore_info_t *) pch; + + if (!pi || !PCIE_PUB(pi->sih)) + return; + + pcie_clkreq_upd(pi, state); + + /* Reduce L1 timer for better power savings */ + pcie_extendL1timer(pi, FALSE); +} + +/* ***** Wake-on-wireless-LAN (WOWL) support functions ***** */ +/* Just uses PCI config accesses to find out, when needed before sb_attach is done */ +bool pcicore_pmecap_fast(osl_t * osh) +{ + uint8 cap_ptr; + uint32 pmecap; + + cap_ptr = + pcicore_find_pci_capability(osh, PCI_CAP_POWERMGMTCAP_ID, NULL, + NULL); + + if (!cap_ptr) + return FALSE; + + pmecap = OSL_PCI_READ_CONFIG(osh, cap_ptr, sizeof(uint32)); + + return ((pmecap & PME_CAP_PM_STATES) != 0); +} + +/* return TRUE if PM capability exists in the pci config space + * Uses and caches the information using core handle + */ +static bool pcicore_pmecap(pcicore_info_t * pi) +{ + uint8 cap_ptr; + uint32 pmecap; + + if (!pi->pmecap_offset) { + cap_ptr = + pcicore_find_pci_capability(pi->osh, + PCI_CAP_POWERMGMTCAP_ID, NULL, + NULL); + if (!cap_ptr) + return FALSE; + + pi->pmecap_offset = cap_ptr; + + pmecap = + OSL_PCI_READ_CONFIG(pi->osh, pi->pmecap_offset, + sizeof(uint32)); + + /* At least one state can generate PME */ + pi->pmecap = (pmecap & PME_CAP_PM_STATES) != 0; + } + + return (pi->pmecap); +} + +/* Enable PME generation */ +void pcicore_pmeen(void *pch) +{ + pcicore_info_t *pi = (pcicore_info_t *) pch; + uint32 w; + + /* if not pmecapable return */ + if (!pcicore_pmecap(pi)) + return; + + w = OSL_PCI_READ_CONFIG(pi->osh, pi->pmecap_offset + PME_CSR_OFFSET, + sizeof(uint32)); + w |= (PME_CSR_PME_EN); + OSL_PCI_WRITE_CONFIG(pi->osh, pi->pmecap_offset + PME_CSR_OFFSET, + sizeof(uint32), w); +} + +/* + * Return TRUE if PME status set + */ +bool pcicore_pmestat(void *pch) +{ + pcicore_info_t *pi = (pcicore_info_t *) pch; + uint32 w; + + if (!pcicore_pmecap(pi)) + return FALSE; + + w = OSL_PCI_READ_CONFIG(pi->osh, pi->pmecap_offset + PME_CSR_OFFSET, + sizeof(uint32)); + + return (w & PME_CSR_PME_STAT) == PME_CSR_PME_STAT; +} + +/* Disable PME generation, clear the PME status bit if set + */ +void pcicore_pmeclr(void *pch) +{ + pcicore_info_t *pi = (pcicore_info_t *) pch; + uint32 w; + + if (!pcicore_pmecap(pi)) + return; + + w = OSL_PCI_READ_CONFIG(pi->osh, pi->pmecap_offset + PME_CSR_OFFSET, + sizeof(uint32)); + + PCI_ERROR(("pcicore_pci_pmeclr PMECSR : 0x%x\n", w)); + + /* PMESTAT is cleared by writing 1 to it */ + w &= ~(PME_CSR_PME_EN); + + OSL_PCI_WRITE_CONFIG(pi->osh, pi->pmecap_offset + PME_CSR_OFFSET, + sizeof(uint32), w); +} + +uint32 pcie_lcreg(void *pch, uint32 mask, uint32 val) +{ + pcicore_info_t *pi = (pcicore_info_t *) pch; + uint8 offset; + + offset = pi->pciecap_lcreg_offset; + if (!offset) + return 0; + + /* set operation */ + if (mask) + OSL_PCI_WRITE_CONFIG(pi->osh, offset, sizeof(uint32), val); + + return OSL_PCI_READ_CONFIG(pi->osh, offset, sizeof(uint32)); +} + +uint32 +pcicore_pciereg(void *pch, uint32 offset, uint32 mask, uint32 val, uint type) +{ + uint32 reg_val = 0; + pcicore_info_t *pi = (pcicore_info_t *) pch; + sbpcieregs_t *pcieregs = pi->regs.pcieregs; + osl_t *osh = pi->osh; + + if (mask) { + PCI_ERROR(("PCIEREG: 0x%x writeval 0x%x\n", offset, val)); + pcie_writereg(osh, pcieregs, type, offset, val); + } + + /* Should not read register 0x154 */ + if (pi->sih->buscorerev <= 5 && offset == PCIE_DLLP_PCIE11 + && type == PCIE_PCIEREGS) + return reg_val; + + reg_val = pcie_readreg(osh, pcieregs, type, offset); + PCI_ERROR(("PCIEREG: 0x%x readval is 0x%x\n", offset, reg_val)); + + return reg_val; +} + +uint32 +pcicore_pcieserdesreg(void *pch, uint32 mdioslave, uint32 offset, uint32 mask, + uint32 val) +{ + uint32 reg_val = 0; + pcicore_info_t *pi = (pcicore_info_t *) pch; + + if (mask) { + PCI_ERROR(("PCIEMDIOREG: 0x%x writeval 0x%x\n", offset, val)); + pcie_mdiowrite(pi, mdioslave, offset, val); + } + + if (pcie_mdioread(pi, mdioslave, offset, ®_val)) + reg_val = 0xFFFFFFFF; + PCI_ERROR(("PCIEMDIOREG: dev 0x%x offset 0x%x read 0x%x\n", mdioslave, + offset, reg_val)); + + return reg_val; +} |