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iop: unconditionally initialize the ATU on platforms known to be 'hosts' 

Platforms like iq80321 and iq80331 which may be host-bus-adapters
require 'iop3xx_init_atu=y' to be specified on the kernel command line.

Signed-off-by: Dan Williams <dan.j.williams@intel.com>
This commit is contained in:
Dan Williams 2008-03-26 19:12:38 -07:00
parent 97c46048ce
commit c34002c102
9 changed files with 36 additions and 40 deletions
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8
arch/arm/mach-iop32x/Kconfig
View File

@ -34,14 +34,6 @@ config MACH_N2100
Say Y here if you want to run your kernel on the Thecus n2100
NAS appliance.
config IOP3XX_ATU
bool "Enable the PCI Controller"
default y
help
Say Y here if you want the IOP to initialize its PCI Controller.
Say N if the IOP is an add in card, the host system owns the PCI
bus in this case.
config MACH_EM7210
bool "Enable support for the Lanner EM7210"
help

11
arch/arm/mach-iop32x/iq31244.c
View File

@ -178,10 +178,9 @@ static struct hw_pci iq31244_pci __initdata = {
static int __init iq31244_pci_init(void)
{
if (is_ep80219()) {
if (iop3xx_get_init_atu() == IOP3XX_INIT_ATU_ENABLE)
pci_common_init(&ep80219_pci);
} else if (machine_is_iq31244()) {
if (is_ep80219())
pci_common_init(&ep80219_pci);
else if (machine_is_iq31244()) {
if (is_80219()) {
printk("note: iq31244 board type has been selected\n");
printk("note: to select ep80219 operation:\n");
@ -190,9 +189,7 @@ static int __init iq31244_pci_init(void)
printk("\t2/ update boot loader to pass"
" the ep80219 id: %d\n", MACH_TYPE_EP80219);
}
if (iop3xx_get_init_atu() == IOP3XX_INIT_ATU_ENABLE)
pci_common_init(&iq31244_pci);
pci_common_init(&iq31244_pci);
}
return 0;

2
arch/arm/mach-iop32x/iq80321.c
View File

@ -106,7 +106,7 @@ static struct hw_pci iq80321_pci __initdata = {
.swizzle = pci_std_swizzle,
.nr_controllers = 1,
.setup = iop3xx_pci_setup,
.preinit = iop3xx_pci_preinit,
.preinit = iop3xx_pci_preinit_cond,
.scan = iop3xx_pci_scan_bus,
.map_irq = iq80321_pci_map_irq,
};

8
arch/arm/mach-iop33x/Kconfig
View File

@ -16,14 +16,6 @@ config MACH_IQ80332
Say Y here if you want to run your kernel on the Intel IQ80332
evaluation kit for the IOP332 chipset.
config IOP3XX_ATU
bool "Enable the PCI Controller"
default y
help
Say Y here if you want the IOP to initialize its PCI Controller.
Say N if the IOP is an add in card, the host system owns the PCI
bus in this case.
endmenu
endif

2
arch/arm/mach-iop33x/iq80331.c
View File

@ -89,7 +89,7 @@ static struct hw_pci iq80331_pci __initdata = {
.swizzle = pci_std_swizzle,
.nr_controllers = 1,
.setup = iop3xx_pci_setup,
.preinit = iop3xx_pci_preinit,
.preinit = iop3xx_pci_preinit_cond,
.scan = iop3xx_pci_scan_bus,
.map_irq = iq80331_pci_map_irq,
};

2
arch/arm/mach-iop33x/iq80332.c
View File

@ -89,7 +89,7 @@ static struct hw_pci iq80332_pci __initdata = {
.swizzle = pci_std_swizzle,
.nr_controllers = 1,
.setup = iop3xx_pci_setup,
.preinit = iop3xx_pci_preinit,
.preinit = iop3xx_pci_preinit_cond,
.scan = iop3xx_pci_scan_bus,
.map_irq = iq80332_pci_map_irq,
};

33
arch/arm/plat-iop/pci.c
View File

@ -24,6 +24,7 @@
#include <asm/hardware.h>
#include <asm/mach/pci.h>
#include <asm/hardware/iop3xx.h>
#include <asm/mach-types.h>
// #define DEBUG
@ -325,13 +326,16 @@ void __init iop3xx_atu_disable(void)
/* Flag to determine whether the ATU is initialized and the PCI bus scanned */
int init_atu;
void __init iop3xx_pci_preinit(void)
{
if (iop3xx_get_init_atu() == IOP3XX_INIT_ATU_ENABLE) {
iop3xx_atu_disable();
iop3xx_atu_setup();
}
int iop3xx_get_init_atu(void) {
/* check if default has been overridden */
if (init_atu != IOP3XX_INIT_ATU_DEFAULT)
return init_atu;
else
return IOP3XX_INIT_ATU_DISABLE;
}
static void __init iop3xx_atu_debug(void)
{
DBG("PCI: Intel IOP3xx PCI init.\n");
DBG("PCI: Outbound memory window 0: PCI 0x%08x%08x\n",
*IOP3XX_OUMWTVR0, *IOP3XX_OMWTVR0);
@ -358,6 +362,23 @@ void __init iop3xx_pci_preinit(void)
hook_fault_code(16+6, iop3xx_pci_abort, SIGBUS, "imprecise external abort");
}
/* for platforms that might be host-bus-adapters */
void __init iop3xx_pci_preinit_cond(void)
{
if (iop3xx_get_init_atu() == IOP3XX_INIT_ATU_ENABLE) {
iop3xx_atu_disable();
iop3xx_atu_setup();
iop3xx_atu_debug();
}
}
void __init iop3xx_pci_preinit(void)
{
iop3xx_atu_disable();
iop3xx_atu_setup();
iop3xx_atu_debug();
}
/* allow init_atu to be user overridden */
static int __init iop3xx_init_atu_setup(char *str)
{

9
include/asm-arm/hardware/iop3xx.h
View File

@ -29,6 +29,7 @@ extern void gpio_line_config(int line, int direction);
extern int gpio_line_get(int line);
extern void gpio_line_set(int line, int value);
extern int init_atu;
extern int iop3xx_get_init_atu(void);
#endif
@ -112,14 +113,6 @@ extern int init_atu;
#define IOP3XX_INIT_ATU_DISABLE -1
#define IOP3XX_INIT_ATU_ENABLE 1
#ifdef CONFIG_IOP3XX_ATU
#define iop3xx_get_init_atu(x) (init_atu == IOP3XX_INIT_ATU_DEFAULT ?\
IOP3XX_INIT_ATU_ENABLE : init_atu)
#else
#define iop3xx_get_init_atu(x) (init_atu == IOP3XX_INIT_ATU_DEFAULT ?\
IOP3XX_INIT_ATU_DISABLE : init_atu)
#endif
/* Messaging Unit */
#define IOP3XX_IMR0 (volatile u32 *)IOP3XX_REG_ADDR(0x0310)
#define IOP3XX_IMR1 (volatile u32 *)IOP3XX_REG_ADDR(0x0314)

1
include/asm-arm/mach/pci.h
View File

@ -55,6 +55,7 @@ void pci_common_init(struct hw_pci *);
extern int iop3xx_pci_setup(int nr, struct pci_sys_data *);
extern struct pci_bus *iop3xx_pci_scan_bus(int nr, struct pci_sys_data *);
extern void iop3xx_pci_preinit(void);
extern void iop3xx_pci_preinit_cond(void);
extern int dc21285_setup(int nr, struct pci_sys_data *);
extern struct pci_bus *dc21285_scan_bus(int nr, struct pci_sys_data *);