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kernel-ark/arch/arm/mach-iop13xx/pci.c
Bjorn Helgaas 9f786d033d arm/PCI: get rid of device resource fixups 
Tell the PCI core about host bridge address translation so it can take
care of bus-to-resource conversion for us.

CC: Russell King <linux@arm.linux.org.uk>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2012-02-23 20:19:01 -07:00

1133 lines
32 KiB
C
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/*
* iop13xx PCI support
* Copyright (c) 2005-2006, Intel Corporation.
*
* 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.
*
*/
#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 <asm/sizes.h>
#include <asm/signal.h>
#include <asm/mach/pci.h>
#include <mach/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;
u32 iop13xx_atue_mem_base;
u32 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 =
(u32) __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: %x\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 =
(u32) __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: %x\n",
__func__, atu, iop13xx_atue_mem_size,
iop13xx_atue_mem_base);
break;
}
printk("%s: Initialized (%uM @ resource/virtual: %08lx/%08x)\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.
*/
struct pci_bus *iop13xx_scan_bus(int nr, struct pci_sys_data *sys)
{
int which_atu;
struct pci_bus *bus = NULL;
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 NULL;
}
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);
bus = pci_bus_atux = pci_scan_root_bus(NULL, sys->busnr,
&iop13xx_atux_ops,
sys, &sys->resources);
break;
case IOP13XX_INIT_ATU_ATUE:
bus = pci_bus_atue = pci_scan_root_bus(NULL, sys->busnr,
&iop13xx_atue_ops,
sys, &sys->resources);
break;
}
return bus;
}
/* 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_io = 0;
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 = kcalloc(2, 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);
res[0].start = IOP13XX_PCIX_LOWER_IO_PA + IOP13XX_PCIX_IO_BUS_OFFSET;
res[0].end = IOP13XX_PCIX_UPPER_IO_PA;
res[0].name = "IQ81340 ATUX PCI I/O Space";
res[0].flags = IORESOURCE_IO;
res[1].start = IOP13XX_PCIX_LOWER_MEM_RA;
res[1].end = IOP13XX_PCIX_UPPER_MEM_RA;
res[1].name = "IQ81340 ATUX PCI Memory Space";
res[1].flags = IORESOURCE_MEM;
sys->mem_offset = IOP13XX_PCIX_MEM_OFFSET;
sys->io_offset = IOP13XX_PCIX_LOWER_IO_PA;
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);
res[0].start = IOP13XX_PCIE_LOWER_IO_PA + IOP13XX_PCIE_IO_BUS_OFFSET;
res[0].end = IOP13XX_PCIE_UPPER_IO_PA;
res[0].name = "IQ81340 ATUE PCI I/O Space";
res[0].flags = IORESOURCE_IO;
res[1].start = IOP13XX_PCIE_LOWER_MEM_RA;
res[1].end = IOP13XX_PCIE_UPPER_MEM_RA;
res[1].name = "IQ81340 ATUE PCI Memory Space";
res[1].flags = IORESOURCE_MEM;
sys->mem_offset = IOP13XX_PCIE_MEM_OFFSET;
sys->io_offset = IOP13XX_PCIE_LOWER_IO_PA;
sys->map_irq = iop13xx_pcie_map_irq;
break;
default:
kfree(res);
return 0;
}
request_resource(&ioport_resource, &res[0]);
request_resource(&iomem_resource, &res[1]);
pci_add_resource_offset(&sys->resources, &res[0], sys->io_offset);
pci_add_resource_offset(&sys->resources, &res[1], 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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