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/*
* HND SiliconBackplane Gigabit Ethernet core software interface
*
* Copyright 2007, Broadcom Corporation
* All Rights Reserved.
*
* THIS SOFTWARE IS OFFERED "AS IS", AND BROADCOM GRANTS NO WARRANTIES OF ANY
* KIND, EXPRESS OR IMPLIED, BY STATUTE, COMMUNICATION OR OTHERWISE. BROADCOM
* SPECIFICALLY DISCLAIMS ANY IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS
* FOR A SPECIFIC PURPOSE OR NONINFRINGEMENT CONCERNING THIS SOFTWARE.
*
*/
#include <typedefs.h>
#include <osl.h>
#include <pcicfg.h>
#include <sbconfig.h>
#include <sbutils.h>
#include "sbgige.h"
#include <hndpci.h>
#include "hndgige.h"
uint32
sb_base(uint32 admatch)
{
uint32 base;
uint type;
type = admatch & SBAM_TYPE_MASK;
ASSERT(type < 3);
base = 0;
if (type == 0) {
base = admatch & SBAM_BASE0_MASK;
} else if (type == 1) {
ASSERT(!(admatch & SBAM_ADNEG)); /* neg not supported */
base = admatch & SBAM_BASE1_MASK;
} else if (type == 2) {
ASSERT(!(admatch & SBAM_ADNEG)); /* neg not supported */
base = admatch & SBAM_BASE2_MASK;
}
return (base);
}
/*
* Setup the gige core.
* Resetting the core will lose all settings.
*/
void
sb_gige_init(sb_t *sbh, uint32 unit, bool *rgmii)
{
volatile pci_config_regs *pci;
sbgige_pcishim_t *ocp;
sbconfig_t *sb;
osl_t *osh;
uint32 statelow;
uint32 statehigh;
uint32 base;
uint32 idx;
void *regs;
/* Sanity checks */
ASSERT(sbh);
ASSERT(rgmii);
idx = sb_coreidx(sbh);
/* point to the gige core registers */
regs = sb_setcore(sbh, SB_GIGETH, unit);
ASSERT(regs);
osh = sb_osh(sbh);
pci = &((sbgige_t *)regs)->pcicfg;
ocp = &((sbgige_t *)regs)->pcishim;
sb = &((sbgige_t *)regs)->sbconfig;
/* Enable the core clock and memory access */
if (!sb_iscoreup(sbh))
sb_core_reset(sbh, 0, 0);
/*
* Setup the 64K memory-mapped region base address through BAR0.
* Leave the other BAR values alone.
*/
base = sb_base(R_REG(osh, &sb->sbadmatch1));
W_REG(osh, &pci->base[0], base);
W_REG(osh, &pci->base[1], 0);
/*
* Enable the PCI memory access anyway. Any PCI config commands
* issued before the core is enabled will go to the emulation
* only and will not go to the real PCI config registers.
*/
OR_REG(osh, &pci->command, 2);
/*
* Enable the posted write flush scheme as follows:
*
* - Enable flush on any core register read
* - Enable timeout on the flush
* - Disable the interrupt mask when flushing
*
* This differs from the default setting only in that interrupts are
* not masked. Since posted writes are not flushed on interrupt, the
* driver must explicitly request a flush in its interrupt handling
* by reading a core register.
*/
W_REG(osh, &ocp->FlushStatusControl, 0x68);
/*
* Determine whether the GbE is in GMII or RGMII mode. This is
* indicated in bit 16 of the SBTMStateHigh register, which is
* part of the core-specific flags field.
*
* For GMII, bypass the Rx/Tx DLLs, i.e. add no delay to RXC/GTXC
* within the core. For RGMII, do not bypass the DLLs, resulting
* in added delay for RXC/GTXC. The SBTMStateLow register contains
* the controls for doing this in the core-specific flags field:
*
* bit 24 - Enable DLL controls
* bit 20 - Bypass Rx DLL
* bit 19 - Bypass Tx DLL
*/
statelow = R_REG(osh, &sb->sbtmstatelow); /* DLL controls */
statehigh = R_REG(osh, &sb->sbtmstatehigh); /* GMII/RGMII mode */
if ((statehigh & (1 << 16)) != 0) /* RGMII */
{
statelow &= ~(1 << 20); /* no Rx bypass (delay) */
statelow &= ~(1 << 19); /* no Tx bypass (delay) */
*rgmii = TRUE;
}
else /* GMII */
{
statelow |= (1 << 20); /* Rx bypass (no delay) */
statelow |= (1 << 19); /* Tx bypass (no delay) */
*rgmii = FALSE;
}
statelow |= (1 << 24); /* enable DLL controls */
W_REG(osh, &sb->sbtmstatelow, statelow);
sb_setcoreidx(sbh, idx);
}
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