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linux-brain/arch/arm/mach-iop13xx/pci.c
Thomas Gleixner 3b20eb2372 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 320 
Based on 1 normalized pattern(s):

  this program is free software you can redistribute it and or modify
  it under the terms and conditions of the gnu general public license
  version 2 as published by the free software foundation this program
  is distributed in the hope it will be useful but without any
  warranty without even the implied warranty of merchantability or
  fitness for a particular purpose see the gnu general public license
  for more details you should have received a copy of the gnu general
  public license along with this program if not write to the free
  software foundation inc 59 temple place suite 330 boston ma 02111
  1307 usa

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-only

has been chosen to replace the boilerplate/reference in 33 file(s).

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Allison Randal <allison@lohutok.net>
Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org>
Reviewed-by: Alexios Zavras <alexios.zavras@intel.com>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190530000435.254582722@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-06-05 17:37:05 +02:00

1116 lines
31 KiB
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// SPDX-License-Identifier: GPL-2.0-only
/*
* iop13xx PCI support
* Copyright (c) 2005-2006, Intel Corporation.
*/
#include <linux/pci.h>
#include <linux/slab.h>
#include <linux/delay.h>
#include <linux/jiffies.h>
#include <linux/export.h>
#include <asm/irq.h>
#include <mach/hardware.h>
#include <linux/sizes.h>
#include <asm/signal.h>
#include <asm/mach/pci.h>
#include "pci.h"
#define IOP13XX_PCI_DEBUG 0
#define PRINTK(x...) ((void)(IOP13XX_PCI_DEBUG && printk(x)))
u32 iop13xx_atux_pmmr_offset; /* This offset can change based on strapping */
u32 iop13xx_atue_pmmr_offset; /* This offset can change based on strapping */
static struct pci_bus *pci_bus_atux = 0;
static struct pci_bus *pci_bus_atue = 0;
void __iomem *iop13xx_atue_mem_base;
void __iomem *iop13xx_atux_mem_base;
size_t iop13xx_atue_mem_size;
size_t iop13xx_atux_mem_size;
EXPORT_SYMBOL(iop13xx_atue_mem_base);
EXPORT_SYMBOL(iop13xx_atux_mem_base);
EXPORT_SYMBOL(iop13xx_atue_mem_size);
EXPORT_SYMBOL(iop13xx_atux_mem_size);
int init_atu = 0; /* Flag to select which ATU(s) to initialize / disable */
static unsigned long atux_trhfa_timeout = 0; /* Trhfa = RST# high to first
access */
/* Scan the initialized busses and ioremap the requested memory range
*/
void iop13xx_map_pci_memory(void)
{
int atu;
struct pci_bus *bus;
struct pci_dev *dev;
resource_size_t end = 0;
for (atu = 0; atu < 2; atu++) {
bus = atu ? pci_bus_atue : pci_bus_atux;
if (bus) {
list_for_each_entry(dev, &bus->devices, bus_list) {
int i;
int max = 7;
if (dev->subordinate)
max = DEVICE_COUNT_RESOURCE;
for (i = 0; i < max; i++) {
struct resource *res = &dev->resource[i];
if (res->flags & IORESOURCE_MEM)
end = max(res->end, end);
}
}
switch(atu) {
case 0:
iop13xx_atux_mem_size =
(end - IOP13XX_PCIX_LOWER_MEM_RA) + 1;
/* 16MB align the request */
if (iop13xx_atux_mem_size & (SZ_16M - 1)) {
iop13xx_atux_mem_size &= ~(SZ_16M - 1);
iop13xx_atux_mem_size += SZ_16M;
}
if (end) {
iop13xx_atux_mem_base = __arm_ioremap_pfn(
__phys_to_pfn(IOP13XX_PCIX_LOWER_MEM_PA)
, 0, iop13xx_atux_mem_size, MT_DEVICE);
if (!iop13xx_atux_mem_base) {
printk("%s: atux allocation "
"failed\n", __func__);
BUG();
}
} else
iop13xx_atux_mem_size = 0;
PRINTK("%s: atu: %d bus_size: %d mem_base: %p\n",
__func__, atu, iop13xx_atux_mem_size,
iop13xx_atux_mem_base);
break;
case 1:
iop13xx_atue_mem_size =
(end - IOP13XX_PCIE_LOWER_MEM_RA) + 1;
/* 16MB align the request */
if (iop13xx_atue_mem_size & (SZ_16M - 1)) {
iop13xx_atue_mem_size &= ~(SZ_16M - 1);
iop13xx_atue_mem_size += SZ_16M;
}
if (end) {
iop13xx_atue_mem_base = __arm_ioremap_pfn(
__phys_to_pfn(IOP13XX_PCIE_LOWER_MEM_PA)
, 0, iop13xx_atue_mem_size, MT_DEVICE);
if (!iop13xx_atue_mem_base) {
printk("%s: atue allocation "
"failed\n", __func__);
BUG();
}
} else
iop13xx_atue_mem_size = 0;
PRINTK("%s: atu: %d bus_size: %d mem_base: %p\n",
__func__, atu, iop13xx_atue_mem_size,
iop13xx_atue_mem_base);
break;
}
printk("%s: Initialized (%uM @ resource/virtual: %08lx/%p)\n",
atu ? "ATUE" : "ATUX",
(atu ? iop13xx_atue_mem_size : iop13xx_atux_mem_size) /
SZ_1M,
atu ? IOP13XX_PCIE_LOWER_MEM_RA :
IOP13XX_PCIX_LOWER_MEM_RA,
atu ? iop13xx_atue_mem_base :
iop13xx_atux_mem_base);
end = 0;
}
}
}
static int iop13xx_atu_function(int atu)
{
int func = 0;
/* the function number depends on the value of the
* IOP13XX_INTERFACE_SEL_PCIX reset strap
* see C-Spec section 3.17
*/
switch(atu) {
case IOP13XX_INIT_ATU_ATUX:
if (__raw_readl(IOP13XX_ESSR0) & IOP13XX_INTERFACE_SEL_PCIX)
func = 5;
else
func = 0;
break;
case IOP13XX_INIT_ATU_ATUE:
if (__raw_readl(IOP13XX_ESSR0) & IOP13XX_INTERFACE_SEL_PCIX)
func = 0;
else
func = 5;
break;
default:
BUG();
}
return func;
}
/* iop13xx_atux_cfg_address - format a configuration address for atux
* @bus: Target bus to access
* @devfn: Combined device number and function number
* @where: Desired register's address offset
*
* Convert the parameters to a configuration address formatted
* according the PCI-X 2.0 specification
*/
static u32 iop13xx_atux_cfg_address(struct pci_bus *bus, int devfn, int where)
{
struct pci_sys_data *sys = bus->sysdata;
u32 addr;
if (sys->busnr == bus->number)
addr = 1 << (PCI_SLOT(devfn) + 16) | (PCI_SLOT(devfn) << 11);
else
addr = bus->number << 16 | PCI_SLOT(devfn) << 11 | 1;
addr |= PCI_FUNC(devfn) << 8 | ((where & 0xff) & ~3);
addr |= ((where & 0xf00) >> 8) << 24; /* upper register number */
return addr;
}
/* iop13xx_atue_cfg_address - format a configuration address for atue
* @bus: Target bus to access
* @devfn: Combined device number and function number
* @where: Desired register's address offset
*
* Convert the parameters to an address usable by the ATUE_OCCAR
*/
static u32 iop13xx_atue_cfg_address(struct pci_bus *bus, int devfn, int where)
{
struct pci_sys_data *sys = bus->sysdata;
u32 addr;
PRINTK("iop13xx_atue_cfg_address: bus: %d dev: %d func: %d",
bus->number, PCI_SLOT(devfn), PCI_FUNC(devfn));
addr = ((u32) bus->number) << IOP13XX_ATUE_OCCAR_BUS_NUM |
((u32) PCI_SLOT(devfn)) << IOP13XX_ATUE_OCCAR_DEV_NUM |
((u32) PCI_FUNC(devfn)) << IOP13XX_ATUE_OCCAR_FUNC_NUM |
(where & ~0x3);
if (sys->busnr != bus->number)
addr |= 1; /* type 1 access */
return addr;
}
/* This routine checks the status of the last configuration cycle. If an error
* was detected it returns >0, else it returns a 0. The errors being checked
* are parity, master abort, target abort (master and target). These types of
* errors occur during a config cycle where there is no device, like during
* the discovery stage.
*/
static int iop13xx_atux_pci_status(int clear)
{
unsigned int status;
int err = 0;
/*
* Check the status registers.
*/
status = __raw_readw(IOP13XX_ATUX_ATUSR);
if (status & IOP_PCI_STATUS_ERROR)
{
PRINTK("\t\t\tPCI error: ATUSR %#08x", status);
if(clear)
__raw_writew(status & IOP_PCI_STATUS_ERROR,
IOP13XX_ATUX_ATUSR);
err = 1;
}
status = __raw_readl(IOP13XX_ATUX_ATUISR);
if (status & IOP13XX_ATUX_ATUISR_ERROR)
{
PRINTK("\t\t\tPCI error interrupt: ATUISR %#08x", status);
if(clear)
__raw_writel(status & IOP13XX_ATUX_ATUISR_ERROR,
IOP13XX_ATUX_ATUISR);
err = 1;
}
return err;
}
/* Simply write the address register and read the configuration
* data. Note that the data dependency on %0 encourages an abort
* to be detected before we return.
*/
static u32 iop13xx_atux_read(unsigned long addr)
{
u32 val;
__asm__ __volatile__(
"str %1, [%2]\n\t"
"ldr %0, [%3]\n\t"
"mov %0, %0\n\t"
: "=r" (val)
: "r" (addr), "r" (IOP13XX_ATUX_OCCAR), "r" (IOP13XX_ATUX_OCCDR));
return val;
}
/* The read routines must check the error status of the last configuration
* cycle. If there was an error, the routine returns all hex f's.
*/
static int
iop13xx_atux_read_config(struct pci_bus *bus, unsigned int devfn, int where,
int size, u32 *value)
{
unsigned long addr = iop13xx_atux_cfg_address(bus, devfn, where);
u32 val = iop13xx_atux_read(addr) >> ((where & 3) * 8);
if (iop13xx_atux_pci_status(1) || is_atux_occdr_error()) {
__raw_writel(__raw_readl(IOP13XX_XBG_BECSR) & 3,
IOP13XX_XBG_BECSR);
val = 0xffffffff;
}
*value = val;
return PCIBIOS_SUCCESSFUL;
}
static int
iop13xx_atux_write_config(struct pci_bus *bus, unsigned int devfn, int where,
int size, u32 value)
{
unsigned long addr = iop13xx_atux_cfg_address(bus, devfn, where);
u32 val;
if (size != 4) {
val = iop13xx_atux_read(addr);
if (!iop13xx_atux_pci_status(1) == 0)
return PCIBIOS_SUCCESSFUL;
where = (where & 3) * 8;
if (size == 1)
val &= ~(0xff << where);
else
val &= ~(0xffff << where);
__raw_writel(val | value << where, IOP13XX_ATUX_OCCDR);
} else {
__raw_writel(addr, IOP13XX_ATUX_OCCAR);
__raw_writel(value, IOP13XX_ATUX_OCCDR);
}
return PCIBIOS_SUCCESSFUL;
}
static struct pci_ops iop13xx_atux_ops = {
.read = iop13xx_atux_read_config,
.write = iop13xx_atux_write_config,
};
/* This routine checks the status of the last configuration cycle. If an error
* was detected it returns >0, else it returns a 0. The errors being checked
* are parity, master abort, target abort (master and target). These types of
* errors occur during a config cycle where there is no device, like during
* the discovery stage.
*/
static int iop13xx_atue_pci_status(int clear)
{
unsigned int status;
int err = 0;
/*
* Check the status registers.
*/
/* standard pci status register */
status = __raw_readw(IOP13XX_ATUE_ATUSR);
if (status & IOP_PCI_STATUS_ERROR) {
PRINTK("\t\t\tPCI error: ATUSR %#08x", status);
if(clear)
__raw_writew(status & IOP_PCI_STATUS_ERROR,
IOP13XX_ATUE_ATUSR);
err++;
}
/* check the normal status bits in the ATUISR */
status = __raw_readl(IOP13XX_ATUE_ATUISR);
if (status & IOP13XX_ATUE_ATUISR_ERROR) {
PRINTK("\t\t\tPCI error: ATUISR %#08x", status);
if (clear)
__raw_writew(status & IOP13XX_ATUE_ATUISR_ERROR,
IOP13XX_ATUE_ATUISR);
err++;
/* check the PCI-E status if the ATUISR reports an interface error */
if (status & IOP13XX_ATUE_STAT_PCI_IFACE_ERR) {
/* get the unmasked errors */
status = __raw_readl(IOP13XX_ATUE_PIE_STS) &
~(__raw_readl(IOP13XX_ATUE_PIE_MSK));
if (status) {
PRINTK("\t\t\tPCI-E error: ATUE_PIE_STS %#08x",
__raw_readl(IOP13XX_ATUE_PIE_STS));
err++;
} else {
PRINTK("\t\t\tPCI-E error: ATUE_PIE_STS %#08x",
__raw_readl(IOP13XX_ATUE_PIE_STS));
PRINTK("\t\t\tPCI-E error: ATUE_PIE_MSK %#08x",
__raw_readl(IOP13XX_ATUE_PIE_MSK));
BUG();
}
if(clear)
__raw_writel(status, IOP13XX_ATUE_PIE_STS);
}
}
return err;
}
static int
iop13xx_pcie_map_irq(const struct pci_dev *dev, u8 idsel, u8 pin)
{
WARN_ON(idsel != 0);
switch (pin) {
case 1: return ATUE_INTA;
case 2: return ATUE_INTB;
case 3: return ATUE_INTC;
case 4: return ATUE_INTD;
default: return -1;
}
}
static u32 iop13xx_atue_read(unsigned long addr)
{
u32 val;
__raw_writel(addr, IOP13XX_ATUE_OCCAR);
val = __raw_readl(IOP13XX_ATUE_OCCDR);
rmb();
return val;
}
/* The read routines must check the error status of the last configuration
* cycle. If there was an error, the routine returns all hex f's.
*/
static int
iop13xx_atue_read_config(struct pci_bus *bus, unsigned int devfn, int where,
int size, u32 *value)
{
u32 val;
unsigned long addr = iop13xx_atue_cfg_address(bus, devfn, where);
/* Hide device numbers > 0 on the local PCI-E bus (Type 0 access) */
if (!PCI_SLOT(devfn) || (addr & 1)) {
val = iop13xx_atue_read(addr) >> ((where & 3) * 8);
if( iop13xx_atue_pci_status(1) || is_atue_occdr_error() ) {
__raw_writel(__raw_readl(IOP13XX_XBG_BECSR) & 3,
IOP13XX_XBG_BECSR);
val = 0xffffffff;
}
PRINTK("addr=%#0lx, val=%#010x", addr, val);
} else
val = 0xffffffff;
*value = val;
return PCIBIOS_SUCCESSFUL;
}
static int
iop13xx_atue_write_config(struct pci_bus *bus, unsigned int devfn, int where,
int size, u32 value)
{
unsigned long addr = iop13xx_atue_cfg_address(bus, devfn, where);
u32 val;
if (size != 4) {
val = iop13xx_atue_read(addr);
if (!iop13xx_atue_pci_status(1) == 0)
return PCIBIOS_SUCCESSFUL;
where = (where & 3) * 8;
if (size == 1)
val &= ~(0xff << where);
else
val &= ~(0xffff << where);
__raw_writel(val | value << where, IOP13XX_ATUE_OCCDR);
} else {
__raw_writel(addr, IOP13XX_ATUE_OCCAR);
__raw_writel(value, IOP13XX_ATUE_OCCDR);
}
return PCIBIOS_SUCCESSFUL;
}
static struct pci_ops iop13xx_atue_ops = {
.read = iop13xx_atue_read_config,
.write = iop13xx_atue_write_config,
};
/* When a PCI device does not exist during config cycles, the XScale gets a
* bus error instead of returning 0xffffffff. We can't rely on the ATU status
* bits to tell us that it was indeed a configuration cycle that caused this
* error especially in the case when the ATUE link is down. Instead we rely
* on data from the south XSI bridge to validate the abort
*/
int
iop13xx_pci_abort(unsigned long addr, unsigned int fsr, struct pt_regs *regs)
{
PRINTK("Data abort: address = 0x%08lx "
"fsr = 0x%03x PC = 0x%08lx LR = 0x%08lx",
addr, fsr, regs->ARM_pc, regs->ARM_lr);
PRINTK("IOP13XX_XBG_BECSR: %#10x", __raw_readl(IOP13XX_XBG_BECSR));
PRINTK("IOP13XX_XBG_BERAR: %#10x", __raw_readl(IOP13XX_XBG_BERAR));
PRINTK("IOP13XX_XBG_BERUAR: %#10x", __raw_readl(IOP13XX_XBG_BERUAR));
/* If it was an imprecise abort, then we need to correct the
* return address to be _after_ the instruction.
*/
if (fsr & (1 << 10))
regs->ARM_pc += 4;
if (is_atue_occdr_error() || is_atux_occdr_error())
return 0;
else
return 1;
}
/* Scan an IOP13XX PCI bus. nr selects which ATU we use.
*/
int iop13xx_scan_bus(int nr, struct pci_host_bridge *bridge)
{
int which_atu, ret;
struct pci_sys_data *sys = pci_host_bridge_priv(bridge);
switch (init_atu) {
case IOP13XX_INIT_ATU_ATUX:
which_atu = nr ? 0 : IOP13XX_INIT_ATU_ATUX;
break;
case IOP13XX_INIT_ATU_ATUE:
which_atu = nr ? 0 : IOP13XX_INIT_ATU_ATUE;
break;
case (IOP13XX_INIT_ATU_ATUX | IOP13XX_INIT_ATU_ATUE):
which_atu = nr ? IOP13XX_INIT_ATU_ATUE : IOP13XX_INIT_ATU_ATUX;
break;
default:
which_atu = 0;
}
if (!which_atu) {
BUG();
return -ENODEV;
}
list_splice_init(&sys->resources, &bridge->windows);
bridge->dev.parent = NULL;
bridge->sysdata = sys;
bridge->busnr = sys->busnr;
switch (which_atu) {
case IOP13XX_INIT_ATU_ATUX:
if (time_after_eq(jiffies + msecs_to_jiffies(1000),
atux_trhfa_timeout)) /* ensure not wrap */
while(time_before(jiffies, atux_trhfa_timeout))
udelay(100);
bridge->ops = &iop13xx_atux_ops;
ret = pci_scan_root_bus_bridge(bridge);
if (!ret)
pci_bus_atux = bridge->bus;
break;
case IOP13XX_INIT_ATU_ATUE:
bridge->ops = &iop13xx_atue_ops;
ret = pci_scan_root_bus_bridge(bridge);
if (!ret)
pci_bus_atue = bridge->bus;
break;
default:
ret = -EINVAL;
}
return ret;
}
/* This function is called from iop13xx_pci_init() after assigning valid
* values to iop13xx_atue_pmmr_offset. This is the location for common
* setup of ATUE for all IOP13XX implementations.
*/
void __init iop13xx_atue_setup(void)
{
int func = iop13xx_atu_function(IOP13XX_INIT_ATU_ATUE);
u32 reg_val;
#ifdef CONFIG_PCI_MSI
/* BAR 0 (inbound msi window) */
__raw_writel(IOP13XX_MU_BASE_PHYS, IOP13XX_MU_MUBAR);
__raw_writel(~(IOP13XX_MU_WINDOW_SIZE - 1), IOP13XX_ATUE_IALR0);
__raw_writel(IOP13XX_MU_BASE_PHYS, IOP13XX_ATUE_IATVR0);
__raw_writel(IOP13XX_MU_BASE_PCI, IOP13XX_ATUE_IABAR0);
#endif
/* BAR 1 (1:1 mapping with Physical RAM) */
/* Set limit and enable */
__raw_writel(~(IOP13XX_MAX_RAM_SIZE - PHYS_OFFSET - 1) & ~0x1,
IOP13XX_ATUE_IALR1);
__raw_writel(0x0, IOP13XX_ATUE_IAUBAR1);
/* Set base at the top of the reserved address space */
__raw_writel(PHYS_OFFSET | PCI_BASE_ADDRESS_MEM_TYPE_64 |
PCI_BASE_ADDRESS_MEM_PREFETCH, IOP13XX_ATUE_IABAR1);
/* 1:1 mapping with physical ram
* (leave big endian byte swap disabled)
*/
__raw_writel(0x0, IOP13XX_ATUE_IAUTVR1);
__raw_writel(PHYS_OFFSET, IOP13XX_ATUE_IATVR1);
/* Outbound window 1 (PCIX/PCIE memory window) */
/* 32 bit Address Space */
__raw_writel(0x0, IOP13XX_ATUE_OUMWTVR1);
/* PA[35:32] */
__raw_writel(IOP13XX_ATUE_OUMBAR_ENABLE |
(IOP13XX_PCIE_MEM_PHYS_OFFSET >> 32),
IOP13XX_ATUE_OUMBAR1);
/* Setup the I/O Bar
* A[35-16] in 31-12
*/
__raw_writel(((IOP13XX_PCIE_LOWER_IO_PA >> 0x4) & 0xfffff000),
IOP13XX_ATUE_OIOBAR);
__raw_writel(IOP13XX_PCIE_LOWER_IO_BA, IOP13XX_ATUE_OIOWTVR);
/* clear startup errors */
iop13xx_atue_pci_status(1);
/* OIOBAR function number
*/
reg_val = __raw_readl(IOP13XX_ATUE_OIOBAR);
reg_val &= ~0x7;
reg_val |= func;
__raw_writel(reg_val, IOP13XX_ATUE_OIOBAR);
/* OUMBAR function numbers
*/
reg_val = __raw_readl(IOP13XX_ATUE_OUMBAR0);
reg_val &= ~(IOP13XX_ATU_OUMBAR_FUNC_NUM_MASK <<
IOP13XX_ATU_OUMBAR_FUNC_NUM);
reg_val |= func << IOP13XX_ATU_OUMBAR_FUNC_NUM;
__raw_writel(reg_val, IOP13XX_ATUE_OUMBAR0);
reg_val = __raw_readl(IOP13XX_ATUE_OUMBAR1);
reg_val &= ~(IOP13XX_ATU_OUMBAR_FUNC_NUM_MASK <<
IOP13XX_ATU_OUMBAR_FUNC_NUM);
reg_val |= func << IOP13XX_ATU_OUMBAR_FUNC_NUM;
__raw_writel(reg_val, IOP13XX_ATUE_OUMBAR1);
reg_val = __raw_readl(IOP13XX_ATUE_OUMBAR2);
reg_val &= ~(IOP13XX_ATU_OUMBAR_FUNC_NUM_MASK <<
IOP13XX_ATU_OUMBAR_FUNC_NUM);
reg_val |= func << IOP13XX_ATU_OUMBAR_FUNC_NUM;
__raw_writel(reg_val, IOP13XX_ATUE_OUMBAR2);
reg_val = __raw_readl(IOP13XX_ATUE_OUMBAR3);
reg_val &= ~(IOP13XX_ATU_OUMBAR_FUNC_NUM_MASK <<
IOP13XX_ATU_OUMBAR_FUNC_NUM);
reg_val |= func << IOP13XX_ATU_OUMBAR_FUNC_NUM;
__raw_writel(reg_val, IOP13XX_ATUE_OUMBAR3);
/* Enable inbound and outbound cycles
*/
reg_val = __raw_readw(IOP13XX_ATUE_ATUCMD);
reg_val |= PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER |
PCI_COMMAND_PARITY | PCI_COMMAND_SERR;
__raw_writew(reg_val, IOP13XX_ATUE_ATUCMD);
reg_val = __raw_readl(IOP13XX_ATUE_ATUCR);
reg_val |= IOP13XX_ATUE_ATUCR_OUT_EN |
IOP13XX_ATUE_ATUCR_IVM;
__raw_writel(reg_val, IOP13XX_ATUE_ATUCR);
}
void __init iop13xx_atue_disable(void)
{
u32 reg_val;
__raw_writew(0x0, IOP13XX_ATUE_ATUCMD);
__raw_writel(IOP13XX_ATUE_ATUCR_IVM, IOP13XX_ATUE_ATUCR);
/* wait for cycles to quiesce */
while (__raw_readl(IOP13XX_ATUE_PCSR) & (IOP13XX_ATUE_PCSR_OUT_Q_BUSY |
IOP13XX_ATUE_PCSR_IN_Q_BUSY |
IOP13XX_ATUE_PCSR_LLRB_BUSY))
cpu_relax();
/* BAR 0 ( Disabled ) */
__raw_writel(0x0, IOP13XX_ATUE_IAUBAR0);
__raw_writel(0x0, IOP13XX_ATUE_IABAR0);
__raw_writel(0x0, IOP13XX_ATUE_IAUTVR0);
__raw_writel(0x0, IOP13XX_ATUE_IATVR0);
__raw_writel(0x0, IOP13XX_ATUE_IALR0);
reg_val = __raw_readl(IOP13XX_ATUE_OUMBAR0);
reg_val &= ~IOP13XX_ATUE_OUMBAR_ENABLE;
__raw_writel(reg_val, IOP13XX_ATUE_OUMBAR0);
/* BAR 1 ( Disabled ) */
__raw_writel(0x0, IOP13XX_ATUE_IAUBAR1);
__raw_writel(0x0, IOP13XX_ATUE_IABAR1);
__raw_writel(0x0, IOP13XX_ATUE_IAUTVR1);
__raw_writel(0x0, IOP13XX_ATUE_IATVR1);
__raw_writel(0x0, IOP13XX_ATUE_IALR1);
reg_val = __raw_readl(IOP13XX_ATUE_OUMBAR1);
reg_val &= ~IOP13XX_ATUE_OUMBAR_ENABLE;
__raw_writel(reg_val, IOP13XX_ATUE_OUMBAR1);
/* BAR 2 ( Disabled ) */
__raw_writel(0x0, IOP13XX_ATUE_IAUBAR2);
__raw_writel(0x0, IOP13XX_ATUE_IABAR2);
__raw_writel(0x0, IOP13XX_ATUE_IAUTVR2);
__raw_writel(0x0, IOP13XX_ATUE_IATVR2);
__raw_writel(0x0, IOP13XX_ATUE_IALR2);
reg_val = __raw_readl(IOP13XX_ATUE_OUMBAR2);
reg_val &= ~IOP13XX_ATUE_OUMBAR_ENABLE;
__raw_writel(reg_val, IOP13XX_ATUE_OUMBAR2);
/* BAR 3 ( Disabled ) */
reg_val = __raw_readl(IOP13XX_ATUE_OUMBAR3);
reg_val &= ~IOP13XX_ATUE_OUMBAR_ENABLE;
__raw_writel(reg_val, IOP13XX_ATUE_OUMBAR3);
/* Setup the I/O Bar
* A[35-16] in 31-12
*/
__raw_writel((IOP13XX_PCIE_LOWER_IO_PA >> 0x4) & 0xfffff000,
IOP13XX_ATUE_OIOBAR);
__raw_writel(IOP13XX_PCIE_LOWER_IO_BA, IOP13XX_ATUE_OIOWTVR);
}
/* This function is called from iop13xx_pci_init() after assigning valid
* values to iop13xx_atux_pmmr_offset. This is the location for common
* setup of ATUX for all IOP13XX implementations.
*/
void __init iop13xx_atux_setup(void)
{
u32 reg_val;
int func = iop13xx_atu_function(IOP13XX_INIT_ATU_ATUX);
/* Take PCI-X bus out of reset if bootloader hasn't already.
* According to spec, we should wait for 2^25 PCI clocks to meet
* the PCI timing parameter Trhfa (RST# high to first access).
* This is rarely necessary and often ignored.
*/
reg_val = __raw_readl(IOP13XX_ATUX_PCSR);
if (reg_val & IOP13XX_ATUX_PCSR_P_RSTOUT) {
int msec = (reg_val >> IOP13XX_ATUX_PCSR_FREQ_OFFSET) & 0x7;
msec = 1000 / (8-msec); /* bits 100=133MHz, 111=>33MHz */
__raw_writel(reg_val & ~IOP13XX_ATUX_PCSR_P_RSTOUT,
IOP13XX_ATUX_PCSR);
atux_trhfa_timeout = jiffies + msecs_to_jiffies(msec);
}
else
atux_trhfa_timeout = jiffies;
#ifdef CONFIG_PCI_MSI
/* BAR 0 (inbound msi window) */
__raw_writel(IOP13XX_MU_BASE_PHYS, IOP13XX_MU_MUBAR);
__raw_writel(~(IOP13XX_MU_WINDOW_SIZE - 1), IOP13XX_ATUX_IALR0);
__raw_writel(IOP13XX_MU_BASE_PHYS, IOP13XX_ATUX_IATVR0);
__raw_writel(IOP13XX_MU_BASE_PCI, IOP13XX_ATUX_IABAR0);
#endif
/* BAR 1 (1:1 mapping with Physical RAM) */
/* Set limit and enable */
__raw_writel(~(IOP13XX_MAX_RAM_SIZE - PHYS_OFFSET - 1) & ~0x1,
IOP13XX_ATUX_IALR1);
__raw_writel(0x0, IOP13XX_ATUX_IAUBAR1);
/* Set base at the top of the reserved address space */
__raw_writel(PHYS_OFFSET | PCI_BASE_ADDRESS_MEM_TYPE_64 |
PCI_BASE_ADDRESS_MEM_PREFETCH, IOP13XX_ATUX_IABAR1);
/* 1:1 mapping with physical ram
* (leave big endian byte swap disabled)
*/
__raw_writel(0x0, IOP13XX_ATUX_IAUTVR1);
__raw_writel(PHYS_OFFSET, IOP13XX_ATUX_IATVR1);
/* Outbound window 1 (PCIX/PCIE memory window) */
/* 32 bit Address Space */
__raw_writel(0x0, IOP13XX_ATUX_OUMWTVR1);
/* PA[35:32] */
__raw_writel(IOP13XX_ATUX_OUMBAR_ENABLE |
IOP13XX_PCIX_MEM_PHYS_OFFSET >> 32,
IOP13XX_ATUX_OUMBAR1);
/* Setup the I/O Bar
* A[35-16] in 31-12
*/
__raw_writel((IOP13XX_PCIX_LOWER_IO_PA >> 0x4) & 0xfffff000,
IOP13XX_ATUX_OIOBAR);
__raw_writel(IOP13XX_PCIX_LOWER_IO_BA, IOP13XX_ATUX_OIOWTVR);
/* clear startup errors */
iop13xx_atux_pci_status(1);
/* OIOBAR function number
*/
reg_val = __raw_readl(IOP13XX_ATUX_OIOBAR);
reg_val &= ~0x7;
reg_val |= func;
__raw_writel(reg_val, IOP13XX_ATUX_OIOBAR);
/* OUMBAR function numbers
*/
reg_val = __raw_readl(IOP13XX_ATUX_OUMBAR0);
reg_val &= ~(IOP13XX_ATU_OUMBAR_FUNC_NUM_MASK <<
IOP13XX_ATU_OUMBAR_FUNC_NUM);
reg_val |= func << IOP13XX_ATU_OUMBAR_FUNC_NUM;
__raw_writel(reg_val, IOP13XX_ATUX_OUMBAR0);
reg_val = __raw_readl(IOP13XX_ATUX_OUMBAR1);
reg_val &= ~(IOP13XX_ATU_OUMBAR_FUNC_NUM_MASK <<
IOP13XX_ATU_OUMBAR_FUNC_NUM);
reg_val |= func << IOP13XX_ATU_OUMBAR_FUNC_NUM;
__raw_writel(reg_val, IOP13XX_ATUX_OUMBAR1);
reg_val = __raw_readl(IOP13XX_ATUX_OUMBAR2);
reg_val &= ~(IOP13XX_ATU_OUMBAR_FUNC_NUM_MASK <<
IOP13XX_ATU_OUMBAR_FUNC_NUM);
reg_val |= func << IOP13XX_ATU_OUMBAR_FUNC_NUM;
__raw_writel(reg_val, IOP13XX_ATUX_OUMBAR2);
reg_val = __raw_readl(IOP13XX_ATUX_OUMBAR3);
reg_val &= ~(IOP13XX_ATU_OUMBAR_FUNC_NUM_MASK <<
IOP13XX_ATU_OUMBAR_FUNC_NUM);
reg_val |= func << IOP13XX_ATU_OUMBAR_FUNC_NUM;
__raw_writel(reg_val, IOP13XX_ATUX_OUMBAR3);
/* Enable inbound and outbound cycles
*/
reg_val = __raw_readw(IOP13XX_ATUX_ATUCMD);
reg_val |= PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER |
PCI_COMMAND_PARITY | PCI_COMMAND_SERR;
__raw_writew(reg_val, IOP13XX_ATUX_ATUCMD);
reg_val = __raw_readl(IOP13XX_ATUX_ATUCR);
reg_val |= IOP13XX_ATUX_ATUCR_OUT_EN;
__raw_writel(reg_val, IOP13XX_ATUX_ATUCR);
}
void __init iop13xx_atux_disable(void)
{
u32 reg_val;
__raw_writew(0x0, IOP13XX_ATUX_ATUCMD);
__raw_writel(0x0, IOP13XX_ATUX_ATUCR);
/* wait for cycles to quiesce */
while (__raw_readl(IOP13XX_ATUX_PCSR) & (IOP13XX_ATUX_PCSR_OUT_Q_BUSY |
IOP13XX_ATUX_PCSR_IN_Q_BUSY))
cpu_relax();
/* BAR 0 ( Disabled ) */
__raw_writel(0x0, IOP13XX_ATUX_IAUBAR0);
__raw_writel(0x0, IOP13XX_ATUX_IABAR0);
__raw_writel(0x0, IOP13XX_ATUX_IAUTVR0);
__raw_writel(0x0, IOP13XX_ATUX_IATVR0);
__raw_writel(0x0, IOP13XX_ATUX_IALR0);
reg_val = __raw_readl(IOP13XX_ATUX_OUMBAR0);
reg_val &= ~IOP13XX_ATUX_OUMBAR_ENABLE;
__raw_writel(reg_val, IOP13XX_ATUX_OUMBAR0);
/* BAR 1 ( Disabled ) */
__raw_writel(0x0, IOP13XX_ATUX_IAUBAR1);
__raw_writel(0x0, IOP13XX_ATUX_IABAR1);
__raw_writel(0x0, IOP13XX_ATUX_IAUTVR1);
__raw_writel(0x0, IOP13XX_ATUX_IATVR1);
__raw_writel(0x0, IOP13XX_ATUX_IALR1);
reg_val = __raw_readl(IOP13XX_ATUX_OUMBAR1);
reg_val &= ~IOP13XX_ATUX_OUMBAR_ENABLE;
__raw_writel(reg_val, IOP13XX_ATUX_OUMBAR1);
/* BAR 2 ( Disabled ) */
__raw_writel(0x0, IOP13XX_ATUX_IAUBAR2);
__raw_writel(0x0, IOP13XX_ATUX_IABAR2);
__raw_writel(0x0, IOP13XX_ATUX_IAUTVR2);
__raw_writel(0x0, IOP13XX_ATUX_IATVR2);
__raw_writel(0x0, IOP13XX_ATUX_IALR2);
reg_val = __raw_readl(IOP13XX_ATUX_OUMBAR2);
reg_val &= ~IOP13XX_ATUX_OUMBAR_ENABLE;
__raw_writel(reg_val, IOP13XX_ATUX_OUMBAR2);
/* BAR 3 ( Disabled ) */
__raw_writel(0x0, IOP13XX_ATUX_IAUBAR3);
__raw_writel(0x0, IOP13XX_ATUX_IABAR3);
__raw_writel(0x0, IOP13XX_ATUX_IAUTVR3);
__raw_writel(0x0, IOP13XX_ATUX_IATVR3);
__raw_writel(0x0, IOP13XX_ATUX_IALR3);
reg_val = __raw_readl(IOP13XX_ATUX_OUMBAR3);
reg_val &= ~IOP13XX_ATUX_OUMBAR_ENABLE;
__raw_writel(reg_val, IOP13XX_ATUX_OUMBAR3);
/* Setup the I/O Bar
* A[35-16] in 31-12
*/
__raw_writel((IOP13XX_PCIX_LOWER_IO_PA >> 0x4) & 0xfffff000,
IOP13XX_ATUX_OIOBAR);
__raw_writel(IOP13XX_PCIX_LOWER_IO_BA, IOP13XX_ATUX_OIOWTVR);
}
void __init iop13xx_set_atu_mmr_bases(void)
{
/* Based on ESSR0, determine the ATU X/E offsets */
switch(__raw_readl(IOP13XX_ESSR0) &
(IOP13XX_CONTROLLER_ONLY | IOP13XX_INTERFACE_SEL_PCIX)) {
/* both asserted */
case 0:
iop13xx_atux_pmmr_offset = IOP13XX_ATU1_PMMR_OFFSET;
iop13xx_atue_pmmr_offset = IOP13XX_ATU2_PMMR_OFFSET;
break;
/* IOP13XX_CONTROLLER_ONLY = deasserted
* IOP13XX_INTERFACE_SEL_PCIX = asserted
*/
case IOP13XX_CONTROLLER_ONLY:
iop13xx_atux_pmmr_offset = IOP13XX_ATU0_PMMR_OFFSET;
iop13xx_atue_pmmr_offset = IOP13XX_ATU2_PMMR_OFFSET;
break;
/* IOP13XX_CONTROLLER_ONLY = asserted
* IOP13XX_INTERFACE_SEL_PCIX = deasserted
*/
case IOP13XX_INTERFACE_SEL_PCIX:
iop13xx_atux_pmmr_offset = IOP13XX_ATU1_PMMR_OFFSET;
iop13xx_atue_pmmr_offset = IOP13XX_ATU2_PMMR_OFFSET;
break;
/* both deasserted */
case IOP13XX_CONTROLLER_ONLY | IOP13XX_INTERFACE_SEL_PCIX:
iop13xx_atux_pmmr_offset = IOP13XX_ATU2_PMMR_OFFSET;
iop13xx_atue_pmmr_offset = IOP13XX_ATU0_PMMR_OFFSET;
break;
default:
BUG();
}
}
void __init iop13xx_atu_select(struct hw_pci *plat_pci)
{
int i;
/* set system defaults
* note: if "iop13xx_init_atu=" is specified this autodetect
* sequence will be bypassed
*/
if (init_atu == IOP13XX_INIT_ATU_DEFAULT) {
/* check for single/dual interface */
if (__raw_readl(IOP13XX_ESSR0) & IOP13XX_INTERFACE_SEL_PCIX) {
/* ATUE must be present check the device id
* to see if ATUX is present.
*/
init_atu |= IOP13XX_INIT_ATU_ATUE;
switch (__raw_readw(IOP13XX_ATUE_DID) & 0xf0) {
case 0x70:
case 0x80:
case 0xc0:
init_atu |= IOP13XX_INIT_ATU_ATUX;
break;
}
} else {
/* ATUX must be present check the device id
* to see if ATUE is present.
*/
init_atu |= IOP13XX_INIT_ATU_ATUX;
switch (__raw_readw(IOP13XX_ATUX_DID) & 0xf0) {
case 0x70:
case 0x80:
case 0xc0:
init_atu |= IOP13XX_INIT_ATU_ATUE;
break;
}
}
/* check central resource and root complex capability */
if (init_atu & IOP13XX_INIT_ATU_ATUX)
if (!(__raw_readl(IOP13XX_ATUX_PCSR) &
IOP13XX_ATUX_PCSR_CENTRAL_RES))
init_atu &= ~IOP13XX_INIT_ATU_ATUX;
if (init_atu & IOP13XX_INIT_ATU_ATUE)
if (__raw_readl(IOP13XX_ATUE_PCSR) &
IOP13XX_ATUE_PCSR_END_POINT)
init_atu &= ~IOP13XX_INIT_ATU_ATUE;
}
for (i = 0; i < 2; i++) {
if((init_atu & (1 << i)) == (1 << i))
plat_pci->nr_controllers++;
}
}
void __init iop13xx_pci_init(void)
{
/* clear pre-existing south bridge errors */
__raw_writel(__raw_readl(IOP13XX_XBG_BECSR) & 3, IOP13XX_XBG_BECSR);
/* Setup the Min Address for PCI memory... */
pcibios_min_mem = IOP13XX_PCIX_LOWER_MEM_BA;
/* if Linux is given control of an ATU
* clear out its prior configuration,
* otherwise do not touch the registers
*/
if (init_atu & IOP13XX_INIT_ATU_ATUE) {
iop13xx_atue_disable();
iop13xx_atue_setup();
}
if (init_atu & IOP13XX_INIT_ATU_ATUX) {
iop13xx_atux_disable();
iop13xx_atux_setup();
}
hook_fault_code(16+6, iop13xx_pci_abort, SIGBUS, 0,
"imprecise external abort");
}
/* initialize the pci memory space. handle any combination of
* atue and atux enabled/disabled
*/
int iop13xx_pci_setup(int nr, struct pci_sys_data *sys)
{
struct resource *res;
int which_atu;
u32 pcixsr, pcsr;
if (nr > 1)
return 0;
res = kzalloc(sizeof(struct resource), GFP_KERNEL);
if (!res)
panic("PCI: unable to alloc resources");
/* 'nr' assumptions:
* ATUX is always 0
* ATUE is 1 when ATUX is also enabled
* ATUE is 0 when ATUX is disabled
*/
switch(init_atu) {
case IOP13XX_INIT_ATU_ATUX:
which_atu = nr ? 0 : IOP13XX_INIT_ATU_ATUX;
break;
case IOP13XX_INIT_ATU_ATUE:
which_atu = nr ? 0 : IOP13XX_INIT_ATU_ATUE;
break;
case (IOP13XX_INIT_ATU_ATUX | IOP13XX_INIT_ATU_ATUE):
which_atu = nr ? IOP13XX_INIT_ATU_ATUE : IOP13XX_INIT_ATU_ATUX;
break;
default:
which_atu = 0;
}
if (!which_atu) {
kfree(res);
return 0;
}
switch(which_atu) {
case IOP13XX_INIT_ATU_ATUX:
pcixsr = __raw_readl(IOP13XX_ATUX_PCIXSR);
pcixsr &= ~0xffff;
pcixsr |= sys->busnr << IOP13XX_ATUX_PCIXSR_BUS_NUM |
0 << IOP13XX_ATUX_PCIXSR_DEV_NUM |
iop13xx_atu_function(IOP13XX_INIT_ATU_ATUX)
<< IOP13XX_ATUX_PCIXSR_FUNC_NUM;
__raw_writel(pcixsr, IOP13XX_ATUX_PCIXSR);
pci_ioremap_io(0, IOP13XX_PCIX_LOWER_IO_PA);
res->start = IOP13XX_PCIX_LOWER_MEM_RA;
res->end = IOP13XX_PCIX_UPPER_MEM_RA;
res->name = "IQ81340 ATUX PCI Memory Space";
res->flags = IORESOURCE_MEM;
sys->mem_offset = IOP13XX_PCIX_MEM_OFFSET;
break;
case IOP13XX_INIT_ATU_ATUE:
/* Note: the function number field in the PCSR is ro */
pcsr = __raw_readl(IOP13XX_ATUE_PCSR);
pcsr &= ~(0xfff8 << 16);
pcsr |= sys->busnr << IOP13XX_ATUE_PCSR_BUS_NUM |
0 << IOP13XX_ATUE_PCSR_DEV_NUM;
__raw_writel(pcsr, IOP13XX_ATUE_PCSR);
pci_ioremap_io(SZ_64K, IOP13XX_PCIE_LOWER_IO_PA);
res->start = IOP13XX_PCIE_LOWER_MEM_RA;
res->end = IOP13XX_PCIE_UPPER_MEM_RA;
res->name = "IQ81340 ATUE PCI Memory Space";
res->flags = IORESOURCE_MEM;
sys->mem_offset = IOP13XX_PCIE_MEM_OFFSET;
sys->map_irq = iop13xx_pcie_map_irq;
break;
default:
kfree(res);
return 0;
}
request_resource(&iomem_resource, res);
pci_add_resource_offset(&sys->resources, res, sys->mem_offset);
return 1;
}
u16 iop13xx_dev_id(void)
{
if (__raw_readl(IOP13XX_ESSR0) & IOP13XX_INTERFACE_SEL_PCIX)
return __raw_readw(IOP13XX_ATUE_DID);
else
return __raw_readw(IOP13XX_ATUX_DID);
}
static int __init iop13xx_init_atu_setup(char *str)
{
init_atu = IOP13XX_INIT_ATU_NONE;
if (str) {
while (*str != '\0') {
switch (*str) {
case 'x':
case 'X':
init_atu |= IOP13XX_INIT_ATU_ATUX;
init_atu &= ~IOP13XX_INIT_ATU_NONE;
break;
case 'e':
case 'E':
init_atu |= IOP13XX_INIT_ATU_ATUE;
init_atu &= ~IOP13XX_INIT_ATU_NONE;
break;
case ',':
case '=':
break;
default:
PRINTK("\"iop13xx_init_atu\" malformed at "
"character: \'%c\'", *str);
*(str + 1) = '\0';
init_atu = IOP13XX_INIT_ATU_DEFAULT;
}
str++;
}
}
return 1;
}
__setup("iop13xx_init_atu", iop13xx_init_atu_setup);
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