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Commit 094f1275 authored by Dan Williams's avatar Dan Williams Committed by Russell King
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[ARM] 4271/1: iop32x: fix ep80219 detection (support iq80219 platforms) 



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: default avatarDan Williams <dan.j.williams@intel.com>
Signed-off-by: default avatarRussell King <rmk+kernel@arm.linux.org.uk>
parent 5455a51e

arch/arm/mach-iop32x/Kconfig

+4 −0
Original line number Diff line number Diff line
@@ -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)

arch/arm/mach-iop32x/iq31244.c

+51 −8
Original line number Diff line number Diff line
@@ -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_80219()) {

	if (is_ep80219())

		pci_common_init(&ep80219_pci);

		} else {

			pci_common_init(&iq31244_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");

			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