6b13f685e
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BSP 최초 추가
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/*
* Define the pci_ops for the PCIC on Toshiba TX4927, TX4938, etc.
*
* Based on linux/arch/mips/pci/ops-tx4938.c,
* linux/arch/mips/pci/fixup-rbtx4938.c,
* linux/arch/mips/txx9/rbtx4938/setup.c,
* and RBTX49xx patch from CELF patch archive.
*
* 2003-2005 (c) MontaVista Software, Inc.
* Copyright (C) 2004 by Ralf Baechle (ralf@linux-mips.org)
* (C) Copyright TOSHIBA CORPORATION 2000-2001, 2004-2007
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*/
#include <linux/kernel.h>
#include <linux/interrupt.h>
#include <linux/irq.h>
#include <asm/txx9/pci.h>
#include <asm/txx9/tx4927pcic.h>
static struct {
struct pci_controller *channel;
struct tx4927_pcic_reg __iomem *pcicptr;
} pcicptrs[2]; /* TX4938 has 2 pcic */
static void __init set_tx4927_pcicptr(struct pci_controller *channel,
struct tx4927_pcic_reg __iomem *pcicptr)
{
int i;
for (i = 0; i < ARRAY_SIZE(pcicptrs); i++) {
if (pcicptrs[i].channel == channel) {
pcicptrs[i].pcicptr = pcicptr;
return;
}
}
for (i = 0; i < ARRAY_SIZE(pcicptrs); i++) {
if (!pcicptrs[i].channel) {
pcicptrs[i].channel = channel;
pcicptrs[i].pcicptr = pcicptr;
return;
}
}
BUG();
}
struct tx4927_pcic_reg __iomem *get_tx4927_pcicptr(
struct pci_controller *channel)
{
int i;
for (i = 0; i < ARRAY_SIZE(pcicptrs); i++) {
if (pcicptrs[i].channel == channel)
return pcicptrs[i].pcicptr;
}
return NULL;
}
static int mkaddr(struct pci_bus *bus, unsigned int devfn, int where,
struct tx4927_pcic_reg __iomem *pcicptr)
{
if (bus->parent == NULL &&
devfn >= PCI_DEVFN(TX4927_PCIC_MAX_DEVNU, 0))
return -1;
__raw_writel(((bus->number & 0xff) << 0x10)
| ((devfn & 0xff) << 0x08) | (where & 0xfc)
| (bus->parent ? 1 : 0),
&pcicptr->g2pcfgadrs);
/* clear M_ABORT and Disable M_ABORT Int. */
__raw_writel((__raw_readl(&pcicptr->pcistatus) & 0x0000ffff)
| (PCI_STATUS_REC_MASTER_ABORT << 16),
&pcicptr->pcistatus);
return 0;
}
static int check_abort(struct tx4927_pcic_reg __iomem *pcicptr)
{
int code = PCIBIOS_SUCCESSFUL;
/* wait write cycle completion before checking error status */
while (__raw_readl(&pcicptr->pcicstatus) & TX4927_PCIC_PCICSTATUS_IWB)
;
if (__raw_readl(&pcicptr->pcistatus)
& (PCI_STATUS_REC_MASTER_ABORT << 16)) {
__raw_writel((__raw_readl(&pcicptr->pcistatus) & 0x0000ffff)
| (PCI_STATUS_REC_MASTER_ABORT << 16),
&pcicptr->pcistatus);
/* flush write buffer */
iob();
code = PCIBIOS_DEVICE_NOT_FOUND;
}
return code;
}
static u8 icd_readb(int offset, struct tx4927_pcic_reg __iomem *pcicptr)
{
#ifdef __BIG_ENDIAN
offset ^= 3;
#endif
return __raw_readb((void __iomem *)&pcicptr->g2pcfgdata + offset);
}
static u16 icd_readw(int offset, struct tx4927_pcic_reg __iomem *pcicptr)
{
#ifdef __BIG_ENDIAN
offset ^= 2;
#endif
return __raw_readw((void __iomem *)&pcicptr->g2pcfgdata + offset);
}
static u32 icd_readl(struct tx4927_pcic_reg __iomem *pcicptr)
{
return __raw_readl(&pcicptr->g2pcfgdata);
}
static void icd_writeb(u8 val, int offset,
struct tx4927_pcic_reg __iomem *pcicptr)
{
#ifdef __BIG_ENDIAN
offset ^= 3;
#endif
__raw_writeb(val, (void __iomem *)&pcicptr->g2pcfgdata + offset);
}
static void icd_writew(u16 val, int offset,
struct tx4927_pcic_reg __iomem *pcicptr)
{
#ifdef __BIG_ENDIAN
offset ^= 2;
#endif
__raw_writew(val, (void __iomem *)&pcicptr->g2pcfgdata + offset);
}
static void icd_writel(u32 val, struct tx4927_pcic_reg __iomem *pcicptr)
{
__raw_writel(val, &pcicptr->g2pcfgdata);
}
static struct tx4927_pcic_reg __iomem *pci_bus_to_pcicptr(struct pci_bus *bus)
{
struct pci_controller *channel = bus->sysdata;
return get_tx4927_pcicptr(channel);
}
static int tx4927_pci_config_read(struct pci_bus *bus, unsigned int devfn,
int where, int size, u32 *val)
{
struct tx4927_pcic_reg __iomem *pcicptr = pci_bus_to_pcicptr(bus);
if (mkaddr(bus, devfn, where, pcicptr)) {
*val = 0xffffffff;
return -1;
}
switch (size) {
case 1:
*val = icd_readb(where & 3, pcicptr);
break;
case 2:
*val = icd_readw(where & 3, pcicptr);
break;
default:
*val = icd_readl(pcicptr);
}
return check_abort(pcicptr);
}
static int tx4927_pci_config_write(struct pci_bus *bus, unsigned int devfn,
int where, int size, u32 val)
{
struct tx4927_pcic_reg __iomem *pcicptr = pci_bus_to_pcicptr(bus);
if (mkaddr(bus, devfn, where, pcicptr))
return -1;
switch (size) {
case 1:
icd_writeb(val, where & 3, pcicptr);
break;
case 2:
icd_writew(val, where & 3, pcicptr);
break;
default:
icd_writel(val, pcicptr);
}
return check_abort(pcicptr);
}
static struct pci_ops tx4927_pci_ops = {
.read = tx4927_pci_config_read,
.write = tx4927_pci_config_write,
};
static struct {
u8 trdyto;
u8 retryto;
u16 gbwc;
} tx4927_pci_opts = {
.trdyto = 0,
.retryto = 0,
.gbwc = 0xfe0, /* 4064 GBUSCLK for CCFG.GTOT=0b11 */
};
char *tx4927_pcibios_setup(char *str)
{
unsigned long val;
if (!strncmp(str, "trdyto=", 7)) {
if (strict_strtoul(str + 7, 0, &val) == 0)
tx4927_pci_opts.trdyto = val;
return NULL;
}
if (!strncmp(str, "retryto=", 8)) {
if (strict_strtoul(str + 8, 0, &val) == 0)
tx4927_pci_opts.retryto = val;
return NULL;
}
if (!strncmp(str, "gbwc=", 5)) {
if (strict_strtoul(str + 5, 0, &val) == 0)
tx4927_pci_opts.gbwc = val;
return NULL;
}
return str;
}
void __init tx4927_pcic_setup(struct tx4927_pcic_reg __iomem *pcicptr,
struct pci_controller *channel, int extarb)
{
int i;
unsigned long flags;
set_tx4927_pcicptr(channel, pcicptr);
if (!channel->pci_ops)
printk(KERN_INFO
"PCIC -- DID:%04x VID:%04x RID:%02x Arbiter:%s
",
__raw_readl(&pcicptr->pciid) >> 16,
__raw_readl(&pcicptr->pciid) & 0xffff,
__raw_readl(&pcicptr->pciccrev) & 0xff,
extarb ? "External" : "Internal");
channel->pci_ops = &tx4927_pci_ops;
local_irq_save(flags);
/* Disable All Initiator Space */
__raw_writel(__raw_readl(&pcicptr->pciccfg)
& ~(TX4927_PCIC_PCICCFG_G2PMEN(0)
| TX4927_PCIC_PCICCFG_G2PMEN(1)
| TX4927_PCIC_PCICCFG_G2PMEN(2)
| TX4927_PCIC_PCICCFG_G2PIOEN),
&pcicptr->pciccfg);
/* GB->PCI mappings */
__raw_writel((channel->io_resource->end - channel->io_resource->start)
>> 4,
&pcicptr->g2piomask);
____raw_writeq((channel->io_resource->start +
channel->io_map_base - IO_BASE) |
#ifdef __BIG_ENDIAN
TX4927_PCIC_G2PIOGBASE_ECHG
#else
TX4927_PCIC_G2PIOGBASE_BSDIS
#endif
, &pcicptr->g2piogbase);
____raw_writeq(channel->io_resource->start - channel->io_offset,
&pcicptr->g2piopbase);
for (i = 0; i < 3; i++) {
__raw_writel(0, &pcicptr->g2pmmask[i]);
____raw_writeq(0, &pcicptr->g2pmgbase[i]);
____raw_writeq(0, &pcicptr->g2pmpbase[i]);
}
if (channel->mem_resource->end) {
__raw_writel((channel->mem_resource->end
- channel->mem_resource->start) >> 4,
&pcicptr->g2pmmask[0]);
____raw_writeq(channel->mem_resource->start |
#ifdef __BIG_ENDIAN
TX4927_PCIC_G2PMnGBASE_ECHG
#else
TX4927_PCIC_G2PMnGBASE_BSDIS
#endif
, &pcicptr->g2pmgbase[0]);
____raw_writeq(channel->mem_resource->start -
channel->mem_offset,
&pcicptr->g2pmpbase[0]);
}
/* PCI->GB mappings (I/O 256B) */
__raw_writel(0, &pcicptr->p2giopbase); /* 256B */
____raw_writeq(0, &pcicptr->p2giogbase);
/* PCI->GB mappings (MEM 512MB (64MB on R1.x)) */
__raw_writel(0, &pcicptr->p2gm0plbase);
__raw_writel(0, &pcicptr->p2gm0pubase);
____raw_writeq(TX4927_PCIC_P2GMnGBASE_TMEMEN |
#ifdef __BIG_ENDIAN
TX4927_PCIC_P2GMnGBASE_TECHG
#else
TX4927_PCIC_P2GMnGBASE_TBSDIS
#endif
, &pcicptr->p2gmgbase[0]);
/* PCI->GB mappings (MEM 16MB) */
__raw_writel(0xffffffff, &pcicptr->p2gm1plbase);
__raw_writel(0xffffffff, &pcicptr->p2gm1pubase);
____raw_writeq(0, &pcicptr->p2gmgbase[1]);
/* PCI->GB mappings (MEM 1MB) */
__raw_writel(0xffffffff, &pcicptr->p2gm2pbase); /* 1MB */
____raw_writeq(0, &pcicptr->p2gmgbase[2]);
/* Clear all (including IRBER) except for GBWC */
__raw_writel((tx4927_pci_opts.gbwc << 16)
& TX4927_PCIC_PCICCFG_GBWC_MASK,
&pcicptr->pciccfg);
/* Enable Initiator Memory Space */
if (channel->mem_resource->end)
__raw_writel(__raw_readl(&pcicptr->pciccfg)
| TX4927_PCIC_PCICCFG_G2PMEN(0),
&pcicptr->pciccfg);
/* Enable Initiator I/O Space */
if (channel->io_resource->end)
__raw_writel(__raw_readl(&pcicptr->pciccfg)
| TX4927_PCIC_PCICCFG_G2PIOEN,
&pcicptr->pciccfg);
/* Enable Initiator Config */
__raw_writel(__raw_readl(&pcicptr->pciccfg)
| TX4927_PCIC_PCICCFG_ICAEN | TX4927_PCIC_PCICCFG_TCAR,
&pcicptr->pciccfg);
/* Do not use MEMMUL, MEMINF: YMFPCI card causes M_ABORT. */
__raw_writel(0, &pcicptr->pcicfg1);
__raw_writel((__raw_readl(&pcicptr->g2ptocnt) & ~0xffff)
| (tx4927_pci_opts.trdyto & 0xff)
| ((tx4927_pci_opts.retryto & 0xff) << 8),
&pcicptr->g2ptocnt);
/* Clear All Local Bus Status */
__raw_writel(TX4927_PCIC_PCICSTATUS_ALL, &pcicptr->pcicstatus);
/* Enable All Local Bus Interrupts */
__raw_writel(TX4927_PCIC_PCICSTATUS_ALL, &pcicptr->pcicmask);
/* Clear All Initiator Status */
__raw_writel(TX4927_PCIC_G2PSTATUS_ALL, &pcicptr->g2pstatus);
/* Enable All Initiator Interrupts */
__raw_writel(TX4927_PCIC_G2PSTATUS_ALL, &pcicptr->g2pmask);
/* Clear All PCI Status Error */
__raw_writel((__raw_readl(&pcicptr->pcistatus) & 0x0000ffff)
| (TX4927_PCIC_PCISTATUS_ALL << 16),
&pcicptr->pcistatus);
/* Enable All PCI Status Error Interrupts */
__raw_writel(TX4927_PCIC_PCISTATUS_ALL, &pcicptr->pcimask);
if (!extarb) {
/* Reset Bus Arbiter */
__raw_writel(TX4927_PCIC_PBACFG_RPBA, &pcicptr->pbacfg);
__raw_writel(0, &pcicptr->pbabm);
/* Enable Bus Arbiter */
__raw_writel(TX4927_PCIC_PBACFG_PBAEN, &pcicptr->pbacfg);
}
__raw_writel(PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY
| PCI_COMMAND_PARITY | PCI_COMMAND_SERR,
&pcicptr->pcistatus);
local_irq_restore(flags);
printk(KERN_DEBUG
"PCI: COMMAND=%04x,PCIMASK=%04x,"
"TRDYTO=%02x,RETRYTO=%02x,GBWC=%03x
",
__raw_readl(&pcicptr->pcistatus) & 0xffff,
__raw_readl(&pcicptr->pcimask) & 0xffff,
__raw_readl(&pcicptr->g2ptocnt) & 0xff,
(__raw_readl(&pcicptr->g2ptocnt) & 0xff00) >> 8,
(__raw_readl(&pcicptr->pciccfg) >> 16) & 0xfff);
}
static void tx4927_report_pcic_status1(struct tx4927_pcic_reg __iomem *pcicptr)
{
__u16 pcistatus = (__u16)(__raw_readl(&pcicptr->pcistatus) >> 16);
__u32 g2pstatus = __raw_readl(&pcicptr->g2pstatus);
__u32 pcicstatus = __raw_readl(&pcicptr->pcicstatus);
static struct {
__u32 flag;
const char *str;
} pcistat_tbl[] = {
{ PCI_STATUS_DETECTED_PARITY, "DetectedParityError" },
{ PCI_STATUS_SIG_SYSTEM_ERROR, "SignaledSystemError" },
{ PCI_STATUS_REC_MASTER_ABORT, "ReceivedMasterAbort" },
{ PCI_STATUS_REC_TARGET_ABORT, "ReceivedTargetAbort" },
{ PCI_STATUS_SIG_TARGET_ABORT, "SignaledTargetAbort" },
{ PCI_STATUS_PARITY, "MasterParityError" },
}, g2pstat_tbl[] = {
{ TX4927_PCIC_G2PSTATUS_TTOE, "TIOE" },
{ TX4927_PCIC_G2PSTATUS_RTOE, "RTOE" },
}, pcicstat_tbl[] = {
{ TX4927_PCIC_PCICSTATUS_PME, "PME" },
{ TX4927_PCIC_PCICSTATUS_TLB, "TLB" },
{ TX4927_PCIC_PCICSTATUS_NIB, "NIB" },
{ TX4927_PCIC_PCICSTATUS_ZIB, "ZIB" },
{ TX4927_PCIC_PCICSTATUS_PERR, "PERR" },
{ TX4927_PCIC_PCICSTATUS_SERR, "SERR" },
{ TX4927_PCIC_PCICSTATUS_GBE, "GBE" },
{ TX4927_PCIC_PCICSTATUS_IWB, "IWB" },
};
int i, cont;
printk(KERN_ERR "");
if (pcistatus & TX4927_PCIC_PCISTATUS_ALL) {
printk(KERN_CONT "pcistat:%04x(", pcistatus);
for (i = 0, cont = 0; i < ARRAY_SIZE(pcistat_tbl); i++)
if (pcistatus & pcistat_tbl[i].flag)
printk(KERN_CONT "%s%s",
cont++ ? " " : "", pcistat_tbl[i].str);
printk(KERN_CONT ") ");
}
if (g2pstatus & TX4927_PCIC_G2PSTATUS_ALL) {
printk(KERN_CONT "g2pstatus:%08x(", g2pstatus);
for (i = 0, cont = 0; i < ARRAY_SIZE(g2pstat_tbl); i++)
if (g2pstatus & g2pstat_tbl[i].flag)
printk(KERN_CONT "%s%s",
cont++ ? " " : "", g2pstat_tbl[i].str);
printk(KERN_CONT ") ");
}
if (pcicstatus & TX4927_PCIC_PCICSTATUS_ALL) {
printk(KERN_CONT "pcicstatus:%08x(", pcicstatus);
for (i = 0, cont = 0; i < ARRAY_SIZE(pcicstat_tbl); i++)
if (pcicstatus & pcicstat_tbl[i].flag)
printk(KERN_CONT "%s%s",
cont++ ? " " : "", pcicstat_tbl[i].str);
printk(KERN_CONT ")");
}
printk(KERN_CONT "
");
}
void tx4927_report_pcic_status(void)
{
int i;
for (i = 0; i < ARRAY_SIZE(pcicptrs); i++) {
if (pcicptrs[i].pcicptr)
tx4927_report_pcic_status1(pcicptrs[i].pcicptr);
}
}
static void tx4927_dump_pcic_settings1(struct tx4927_pcic_reg __iomem *pcicptr)
{
int i;
__u32 __iomem *preg = (__u32 __iomem *)pcicptr;
printk(KERN_INFO "tx4927 pcic (0x%p) settings:", pcicptr);
for (i = 0; i < sizeof(struct tx4927_pcic_reg); i += 4, preg++) {
if (i % 32 == 0) {
printk(KERN_CONT "
");
printk(KERN_INFO "%04x:", i);
}
/* skip registers with side-effects */
if (i == offsetof(struct tx4927_pcic_reg, g2pintack)
|| i == offsetof(struct tx4927_pcic_reg, g2pspc)
|| i == offsetof(struct tx4927_pcic_reg, g2pcfgadrs)
|| i == offsetof(struct tx4927_pcic_reg, g2pcfgdata)) {
printk(KERN_CONT " XXXXXXXX");
continue;
}
printk(KERN_CONT " %08x", __raw_readl(preg));
}
printk(KERN_CONT "
");
}
void tx4927_dump_pcic_settings(void)
{
int i;
for (i = 0; i < ARRAY_SIZE(pcicptrs); i++) {
if (pcicptrs[i].pcicptr)
tx4927_dump_pcic_settings1(pcicptrs[i].pcicptr);
}
}
irqreturn_t tx4927_pcierr_interrupt(int irq, void *dev_id)
{
struct pt_regs *regs = get_irq_regs();
struct tx4927_pcic_reg __iomem *pcicptr =
(struct tx4927_pcic_reg __iomem *)(unsigned long)dev_id;
if (txx9_pci_err_action != TXX9_PCI_ERR_IGNORE) {
printk(KERN_WARNING "PCIERR interrupt at 0x%0*lx
",
(int)(2 * sizeof(unsigned long)), regs->cp0_epc);
tx4927_report_pcic_status1(pcicptr);
}
if (txx9_pci_err_action != TXX9_PCI_ERR_PANIC) {
/* clear all pci errors */
__raw_writel((__raw_readl(&pcicptr->pcistatus) & 0x0000ffff)
| (TX4927_PCIC_PCISTATUS_ALL << 16),
&pcicptr->pcistatus);
__raw_writel(TX4927_PCIC_G2PSTATUS_ALL, &pcicptr->g2pstatus);
__raw_writel(TX4927_PCIC_PBASTATUS_ALL, &pcicptr->pbastatus);
__raw_writel(TX4927_PCIC_PCICSTATUS_ALL, &pcicptr->pcicstatus);
return IRQ_HANDLED;
}
console_verbose();
tx4927_dump_pcic_settings1(pcicptr);
panic("PCI error.");
}
#ifdef CONFIG_TOSHIBA_FPCIB0
static void tx4927_quirk_slc90e66_bridge(struct pci_dev *dev)
{
struct tx4927_pcic_reg __iomem *pcicptr = pci_bus_to_pcicptr(dev->bus);
if (!pcicptr)
return;
if (__raw_readl(&pcicptr->pbacfg) & TX4927_PCIC_PBACFG_PBAEN) {
/* Reset Bus Arbiter */
__raw_writel(TX4927_PCIC_PBACFG_RPBA, &pcicptr->pbacfg);
/*
* swap reqBP and reqXP (raise priority of SLC90E66).
* SLC90E66(PCI-ISA bridge) is connected to REQ2 on
* PCI Backplane board.
*/
__raw_writel(0x72543610, &pcicptr->pbareqport);
__raw_writel(0, &pcicptr->pbabm);
/* Use Fixed ParkMaster (required by SLC90E66) */
__raw_writel(TX4927_PCIC_PBACFG_FIXPA, &pcicptr->pbacfg);
/* Enable Bus Arbiter */
__raw_writel(TX4927_PCIC_PBACFG_FIXPA |
TX4927_PCIC_PBACFG_PBAEN,
&pcicptr->pbacfg);
printk(KERN_INFO "PCI: Use Fixed Park Master (REQPORT %08x)
",
__raw_readl(&pcicptr->pbareqport));
}
}
#define PCI_DEVICE_ID_EFAR_SLC90E66_0 0x9460
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_EFAR, PCI_DEVICE_ID_EFAR_SLC90E66_0,
tx4927_quirk_slc90e66_bridge);
#endif
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