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[ARM] 4271/1: iop32x: fix ep80219 detection (support iq80219 platforms)

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An iq80219 is a board with an iq31244 layout and an 80219 processor.  It
breaks the current assumption that all 80219 processors run on ep80219
platforms.  This patch adds the "force_ep80219" option to the kernel to
override boot loaders that have passed in the iq31244 id, and adds the
MACHINE_START definition for ep80219.

[ patch assumes that EP80219 has been added to mach-types ]

Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Dan Williams 2007-03-16 19:31:06 +01:00 committed by Russell King
parent 5455a51e6f
commit 094f127588
2 changed files with 55 additions and 8 deletions
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4
arch/arm/mach-iop32x/Kconfig
View File

@ -4,6 +4,9 @@ menu "IOP32x Implementation Options"
comment "IOP32x Platform Types"
config MACH_EP80219
bool
config MACH_GLANTANK
bool "Enable support for the IO-Data GLAN Tank"
help
@ -19,6 +22,7 @@ config ARCH_IQ80321
config ARCH_IQ31244
bool "Enable support for EP80219/IQ31244"
select MACH_EP80219
help
Say Y here if you want to run your kernel on the Intel EP80219
evaluation kit for the Intel 80219 processor (a IOP321 variant)

59
arch/arm/mach-iop32x/iq31244.c
View File

@ -39,22 +39,35 @@
#include <asm/arch/time.h>
/*
* The EP80219 and IQ31244 use the same machine ID. To find out
* which of the two we're running on, we look at the processor ID.
* Until March of 2007 iq31244 platforms and ep80219 platforms shared the
* same machine id, and the processor type was used to select board type.
* However this assumption breaks for an iq80219 board which is an iop219
* processor on an iq31244 board. The force_ep80219 flag has been added
* for old boot loaders using the iq31244 machine id for an ep80219 platform.
*/
static int force_ep80219;
static int is_80219(void)
{
extern int processor_id;
return !!((processor_id & 0xffffffe0) == 0x69052e20);
}
static int is_ep80219(void)
{
if (machine_is_ep80219() || force_ep80219)
return 1;
else
return 0;
}
/*
* EP80219/IQ31244 timer tick configuration.
*/
static void __init iq31244_timer_init(void)
{
if (is_80219()) {
if (is_ep80219()) {
/* 33.333 MHz crystal. */
iop_init_time(200000000);
} else {
@ -165,12 +178,18 @@ static struct hw_pci iq31244_pci __initdata = {
static int __init iq31244_pci_init(void)
{
if (machine_is_iq31244()) {
if (is_ep80219())
pci_common_init(&ep80219_pci);
else if (machine_is_iq31244()) {
if (is_80219()) {
pci_common_init(&ep80219_pci);
} else {
pci_common_init(&iq31244_pci);
printk("note: iq31244 board type has been selected\n");
printk("note: to select ep80219 operation:\n");
printk("\t1/ specify \"force_ep80219\" on the kernel"
" command line\n");
printk("\t2/ update boot loader to pass"
" the ep80219 id: %d\n", MACH_TYPE_EP80219);
}
pci_common_init(&iq31244_pci);
}
return 0;
@ -277,10 +296,18 @@ static void __init iq31244_init_machine(void)
platform_device_register(&iq31244_flash_device);
platform_device_register(&iq31244_serial_device);
if (is_80219())
if (is_ep80219())
pm_power_off = ep80219_power_off;
}
static int __init force_ep80219_setup(char *str)
{
force_ep80219 = 1;
return 1;
}
__setup("force_ep80219", force_ep80219_setup);
MACHINE_START(IQ31244, "Intel IQ31244")
/* Maintainer: Intel Corp. */
.phys_io = IQ31244_UART,
@ -291,3 +318,19 @@ MACHINE_START(IQ31244, "Intel IQ31244")
.timer = &iq31244_timer,
.init_machine = iq31244_init_machine,
MACHINE_END
/* There should have been an ep80219 machine identifier from the beginning.
* Boot roms older than March 2007 do not know the ep80219 machine id. Pass
* "force_ep80219" on the kernel command line, otherwise iq31244 operation
* will be selected.
*/
MACHINE_START(EP80219, "Intel EP80219")
/* Maintainer: Intel Corp. */
.phys_io = IQ31244_UART,
.io_pg_offst = ((IQ31244_UART) >> 18) & 0xfffc,
.boot_params = 0xa0000100,
.map_io = iq31244_map_io,
.init_irq = iop32x_init_irq,
.timer = &iq31244_timer,
.init_machine = iq31244_init_machine,
MACHINE_END