static int ppc405ex_pciex_init_port_hw(struct ppc4xx_pciex_port *port)
{
u32 val;
if (port->endpoint)
val = PTYPE_LEGACY_ENDPOINT;
else
val = PTYPE_ROOT_PORT;
mtdcri(SDR0, port->sdr_base + PESDRn_DLPSET,
1 << 24 | val << 20 | LNKW_X1 << 12);
mtdcri(SDR0, port->sdr_base + PESDRn_UTLSET1, 0x00000000);
mtdcri(SDR0, port->sdr_base + PESDRn_UTLSET2, 0x01010000);
mtdcri(SDR0, port->sdr_base + PESDRn_405EX_PHYSET1, 0x720F0000);
mtdcri(SDR0, port->sdr_base + PESDRn_405EX_PHYSET2, 0x70600003);
/*
* Only reset the PHY when no link is currently established.
* This is for the Atheros PCIe board which has problems to establish
* the link (again) after this PHY reset. All other currently tested
* PCIe boards don't show this problem.
* This has to be re-tested and fixed in a later release!
*/
val = mfdcri(SDR0, port->sdr_base + PESDRn_LOOP);
if (!(val & 0x00001000))
ppc405ex_pcie_phy_reset(port);
dcr_write(port->dcrs, DCRO_PEGPL_CFG, 0x10000000); /* guarded on */
port->has_ibpre = 1;
return 0;
}
/* Global PCIe core initializations for 440SPe core */
static int __init ppc440spe_pciex_core_init(struct device_node *np)
{
int time_out = 20;
/* Set PLL clock receiver to LVPECL */
mtdcri(SDR0, PESDR0_PLLLCT1, mfdcri(SDR0, PESDR0_PLLLCT1) | 1 << 28);
/* Shouldn't we do all the calibration stuff etc... here ? */
if (ppc440spe_pciex_check_reset(np))
return -ENXIO;
if (!(mfdcri(SDR0, PESDR0_PLLLCT2) & 0x10000)) {
printk(KERN_INFO "PCIE: PESDR_PLLCT2 resistance calibration "
"failed (0x%08x)\n",
mfdcri(SDR0, PESDR0_PLLLCT2));
return -1;
}
/* De-assert reset of PCIe PLL, wait for lock */
mtdcri(SDR0, PESDR0_PLLLCT1,
mfdcri(SDR0, PESDR0_PLLLCT1) & ~(1 << 24));
udelay(3);
while (time_out) {
if (!(mfdcri(SDR0, PESDR0_PLLLCT3) & 0x10000000)) {
time_out--;
udelay(1);
} else
break;
}
if (!time_out) {
printk(KERN_INFO "PCIE: VCO output not locked\n");
return -1;
}
pr_debug("PCIE initialization OK\n");
return 3;
}
static int __init kilauea_probe(void)
{
unsigned long root = of_get_flat_dt_root();
if (!of_flat_dt_is_compatible(root, "amcc,kilauea"))
return 0;
ppc_pci_flags = PPC_PCI_REASSIGN_ALL_RSRC;
/*
* 405EX(r) has SDR0_MFR[E0CS/E1CS] set after reset. This selects
* the internal loopback mode. Clear these bits so that both EMACs
* don't use loopback mode as deafult.
*/
mtdcri(SDR0, SDR0_MFR, mfdcri(SDR0, SDR0_MFR) & ~0x0c000000);
return 1;
}
static int __init ppc4xx_pciex_wait_on_sdr(struct ppc4xx_pciex_port *port,
unsigned int sdr_offset,
unsigned int mask,
unsigned int value,
int timeout_ms)
{
u32 val;
while(timeout_ms--) {
val = mfdcri(SDR0, port->sdr_base + sdr_offset);
if ((val & mask) == value) {
pr_debug("PCIE%d: Wait on SDR %x success with tm %d (%08x)\n",
port->index, sdr_offset, timeout_ms, val);
return 0;
}
msleep(1);
}
return -1;
}
static void ppc405ex_pcie_phy_reset(struct ppc4xx_pciex_port *port)
{
/* Assert the PE0_PHY reset */
mtdcri(SDR0, port->sdr_base + PESDRn_RCSSET, 0x01010000);
msleep(1);
/* deassert the PE0_hotreset */
if (port->endpoint)
mtdcri(SDR0, port->sdr_base + PESDRn_RCSSET, 0x01111000);
else
mtdcri(SDR0, port->sdr_base + PESDRn_RCSSET, 0x01101000);
/* poll for phy !reset */
/* XXX FIXME add timeout */
while (!(mfdcri(SDR0, port->sdr_base + PESDRn_405EX_PHYSTA) & 0x00001000))
;
/* deassert the PE0_gpl_utl_reset */
mtdcri(SDR0, port->sdr_base + PESDRn_RCSSET, 0x00101000);
}
static int ppc440spe_pciex_init_port_hw(struct ppc4xx_pciex_port *port)
{
u32 val = 1 << 24;
if (port->endpoint)
val = PTYPE_LEGACY_ENDPOINT << 20;
else
val = PTYPE_ROOT_PORT << 20;
if (port->index == 0)
val |= LNKW_X8 << 12;
else
val |= LNKW_X4 << 12;
mtdcri(SDR0, port->sdr_base + PESDRn_DLPSET, val);
mtdcri(SDR0, port->sdr_base + PESDRn_UTLSET1, 0x20222222);
if (ppc440spe_revA())
mtdcri(SDR0, port->sdr_base + PESDRn_UTLSET2, 0x11000000);
mtdcri(SDR0, port->sdr_base + PESDRn_440SPE_HSSL0SET1, 0x35000000);
mtdcri(SDR0, port->sdr_base + PESDRn_440SPE_HSSL1SET1, 0x35000000);
mtdcri(SDR0, port->sdr_base + PESDRn_440SPE_HSSL2SET1, 0x35000000);
mtdcri(SDR0, port->sdr_base + PESDRn_440SPE_HSSL3SET1, 0x35000000);
if (port->index == 0) {
mtdcri(SDR0, port->sdr_base + PESDRn_440SPE_HSSL4SET1,
0x35000000);
mtdcri(SDR0, port->sdr_base + PESDRn_440SPE_HSSL5SET1,
0x35000000);
mtdcri(SDR0, port->sdr_base + PESDRn_440SPE_HSSL6SET1,
0x35000000);
mtdcri(SDR0, port->sdr_base + PESDRn_440SPE_HSSL7SET1,
0x35000000);
}
val = mfdcri(SDR0, port->sdr_base + PESDRn_RCSSET);
mtdcri(SDR0, port->sdr_base + PESDRn_RCSSET,
(val & ~(1 << 24 | 1 << 16)) | 1 << 12);
return 0;
}
static int ppc460ex_pciex_init_port_hw(struct ppc4xx_pciex_port *port)
{
u32 val;
u32 utlset1;
if (port->endpoint)
val = PTYPE_LEGACY_ENDPOINT << 20;
else
val = PTYPE_ROOT_PORT << 20;
if (port->index == 0) {
val |= LNKW_X1 << 12;
utlset1 = 0x20000000;
} else {
val |= LNKW_X4 << 12;
utlset1 = 0x20101101;
}
mtdcri(SDR0, port->sdr_base + PESDRn_DLPSET, val);
mtdcri(SDR0, port->sdr_base + PESDRn_UTLSET1, utlset1);
mtdcri(SDR0, port->sdr_base + PESDRn_UTLSET2, 0x01210000);
switch (port->index) {
case 0:
mtdcri(SDR0, PESDR0_460EX_L0CDRCTL, 0x00003230);
mtdcri(SDR0, PESDR0_460EX_L0DRV, 0x00000130);
mtdcri(SDR0, PESDR0_460EX_L0CLK, 0x00000006);
mtdcri(SDR0, PESDR0_460EX_PHY_CTL_RST,0x10000000);
break;
case 1:
mtdcri(SDR0, PESDR1_460EX_L0CDRCTL, 0x00003230);
mtdcri(SDR0, PESDR1_460EX_L1CDRCTL, 0x00003230);
mtdcri(SDR0, PESDR1_460EX_L2CDRCTL, 0x00003230);
mtdcri(SDR0, PESDR1_460EX_L3CDRCTL, 0x00003230);
mtdcri(SDR0, PESDR1_460EX_L0DRV, 0x00000130);
mtdcri(SDR0, PESDR1_460EX_L1DRV, 0x00000130);
mtdcri(SDR0, PESDR1_460EX_L2DRV, 0x00000130);
mtdcri(SDR0, PESDR1_460EX_L3DRV, 0x00000130);
mtdcri(SDR0, PESDR1_460EX_L0CLK, 0x00000006);
mtdcri(SDR0, PESDR1_460EX_L1CLK, 0x00000006);
mtdcri(SDR0, PESDR1_460EX_L2CLK, 0x00000006);
mtdcri(SDR0, PESDR1_460EX_L3CLK, 0x00000006);
mtdcri(SDR0, PESDR1_460EX_PHY_CTL_RST,0x10000000);
break;
}
mtdcri(SDR0, port->sdr_base + PESDRn_RCSSET,
mfdcri(SDR0, port->sdr_base + PESDRn_RCSSET) |
(PESDRx_RCSSET_RSTGU | PESDRx_RCSSET_RSTPYN));
/* Poll for PHY reset */
/* XXX FIXME add timeout */
switch (port->index) {
case 0:
while (!(mfdcri(SDR0, PESDR0_460EX_RSTSTA) & 0x1))
udelay(10);
break;
case 1:
while (!(mfdcri(SDR0, PESDR1_460EX_RSTSTA) & 0x1))
udelay(10);
break;
}
mtdcri(SDR0, port->sdr_base + PESDRn_RCSSET,
(mfdcri(SDR0, port->sdr_base + PESDRn_RCSSET) &
~(PESDRx_RCSSET_RSTGU | PESDRx_RCSSET_RSTDL)) |
PESDRx_RCSSET_RSTPYN);
port->has_ibpre = 1;
return 0;
}
/* Check various reset bits of the 440SPe PCIe core */
static int __init ppc440spe_pciex_check_reset(struct device_node *np)
{
u32 valPE0, valPE1, valPE2;
int err = 0;
/* SDR0_PEGPLLLCT1 reset */
if (!(mfdcri(SDR0, PESDR0_PLLLCT1) & 0x01000000)) {
/*
* the PCIe core was probably already initialised
* by firmware - let's re-reset RCSSET regs
*
* -- Shouldn't we also re-reset the whole thing ? -- BenH
*/
pr_debug("PCIE: SDR0_PLLLCT1 already reset.\n");
mtdcri(SDR0, PESDR0_440SPE_RCSSET, 0x01010000);
mtdcri(SDR0, PESDR1_440SPE_RCSSET, 0x01010000);
mtdcri(SDR0, PESDR2_440SPE_RCSSET, 0x01010000);
}
valPE0 = mfdcri(SDR0, PESDR0_440SPE_RCSSET);
valPE1 = mfdcri(SDR0, PESDR1_440SPE_RCSSET);
valPE2 = mfdcri(SDR0, PESDR2_440SPE_RCSSET);
/* SDR0_PExRCSSET rstgu */
if (!(valPE0 & 0x01000000) ||
!(valPE1 & 0x01000000) ||
!(valPE2 & 0x01000000)) {
printk(KERN_INFO "PCIE: SDR0_PExRCSSET rstgu error\n");
err = -1;
}
/* SDR0_PExRCSSET rstdl */
if (!(valPE0 & 0x00010000) ||
!(valPE1 & 0x00010000) ||
!(valPE2 & 0x00010000)) {
printk(KERN_INFO "PCIE: SDR0_PExRCSSET rstdl error\n");
err = -1;
}
/* SDR0_PExRCSSET rstpyn */
if ((valPE0 & 0x00001000) ||
(valPE1 & 0x00001000) ||
(valPE2 & 0x00001000)) {
printk(KERN_INFO "PCIE: SDR0_PExRCSSET rstpyn error\n");
err = -1;
}
/* SDR0_PExRCSSET hldplb */
if ((valPE0 & 0x10000000) ||
(valPE1 & 0x10000000) ||
(valPE2 & 0x10000000)) {
printk(KERN_INFO "PCIE: SDR0_PExRCSSET hldplb error\n");
err = -1;
}
/* SDR0_PExRCSSET rdy */
if ((valPE0 & 0x00100000) ||
(valPE1 & 0x00100000) ||
(valPE2 & 0x00100000)) {
printk(KERN_INFO "PCIE: SDR0_PExRCSSET rdy error\n");
err = -1;
}
/* SDR0_PExRCSSET shutdown */
if ((valPE0 & 0x00000100) ||
(valPE1 & 0x00000100) ||
(valPE2 & 0x00000100)) {
printk(KERN_INFO "PCIE: SDR0_PExRCSSET shutdown error\n");
err = -1;
}
return err;
}
static int __init ppc4xx_pciex_port_init(struct ppc4xx_pciex_port *port)
{
int rc = 0;
/* Init HW */
if (ppc4xx_pciex_hwops->port_init_hw)
rc = ppc4xx_pciex_hwops->port_init_hw(port);
if (rc != 0)
return rc;
printk(KERN_INFO "PCIE%d: Checking link...\n",
port->index);
/* Wait for reset to complete */
if (ppc4xx_pciex_wait_on_sdr(port, PESDRn_RCSSTS, 1 << 20, 0, 10)) {
printk(KERN_WARNING "PCIE%d: PGRST failed\n",
port->index);
return -1;
}
/* Check for card presence detect if supported, if not, just wait for
* link unconditionally.
*
* note that we don't fail if there is no link, we just filter out
* config space accesses. That way, it will be easier to implement
* hotplug later on.
*/
if (!port->has_ibpre ||
!ppc4xx_pciex_wait_on_sdr(port, PESDRn_LOOP,
1 << 28, 1 << 28, 100)) {
printk(KERN_INFO
"PCIE%d: Device detected, waiting for link...\n",
port->index);
if (ppc4xx_pciex_wait_on_sdr(port, PESDRn_LOOP,
0x1000, 0x1000, 2000))
printk(KERN_WARNING
"PCIE%d: Link up failed\n", port->index);
else {
printk(KERN_INFO
"PCIE%d: link is up !\n", port->index);
port->link = 1;
}
} else
printk(KERN_INFO "PCIE%d: No device detected.\n", port->index);
/*
* Initialize mapping: disable all regions and configure
* CFG and REG regions based on resources in the device tree
*/
ppc4xx_pciex_port_init_mapping(port);
/*
* Map UTL
*/
port->utl_base = ioremap(port->utl_regs.start, 0x100);
BUG_ON(port->utl_base == NULL);
/*
* Setup UTL registers --BenH.
*/
if (ppc4xx_pciex_hwops->setup_utl)
ppc4xx_pciex_hwops->setup_utl(port);
/*
* Check for VC0 active and assert RDY.
*/
if (port->link &&
ppc4xx_pciex_wait_on_sdr(port, PESDRn_RCSSTS,
1 << 16, 1 << 16, 5000)) {
printk(KERN_INFO "PCIE%d: VC0 not active\n", port->index);
port->link = 0;
}
mtdcri(SDR0, port->sdr_base + PESDRn_RCSSET,
mfdcri(SDR0, port->sdr_base + PESDRn_RCSSET) | 1 << 20);
msleep(100);
return 0;
}
