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x86, olpc: Use pci subarch init for OLPC 

Replace the #ifdef'ed OLPC-specific init functions by a conditional
x86_init function.  If the function returns 0 we leave pci_arch_init,
otherwise we continue.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Jesse Barnes <jbarnes@virtuousgeek.org>
Cc: Andres Salomon <dilinger@collabora.co.uk>
LKML-Reference: <43F901BD926A4E43B106BF17856F0755A318CE89@orsmsx508.amr.corp.intel.com>
Signed-off-by: Jacob Pan <jacob.jun.pan@intel.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
This commit is contained in:
Thomas Gleixner 2010-02-22 05:42:04 -08:00 committed by H. Peter Anvin
parent 4fb6088a5c
commit d5d0e88c1e
5 changed files with 13 additions and 29 deletions
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20
arch/x86/include/asm/olpc.h
View File

@ -13,7 +13,6 @@ struct olpc_platform_t {
#define OLPC_F_PRESENT 0x01
#define OLPC_F_DCON 0x02
#define OLPC_F_VSA 0x04
#ifdef CONFIG_OLPC
@ -50,18 +49,6 @@ static inline int olpc_has_dcon(void)
return (olpc_platform_info.flags & OLPC_F_DCON) ? 1 : 0;
}
/*
* The VSA is software from AMD that typical Geode bioses will include.
* It is used to emulate the PCI bus, VGA, etc. OLPC's Open Firmware does
* not include the VSA; instead, PCI is emulated by the kernel.
*
* The VSA is described further in arch/x86/pci/olpc.c.
*/
static inline int olpc_has_vsa(void)
{
return (olpc_platform_info.flags & OLPC_F_VSA) ? 1 : 0;
}
/*
* The "Mass Production" version of OLPC's XO is identified as being model
* C2. During the prototype phase, the following models (in chronological
@ -87,13 +74,10 @@ static inline int olpc_has_dcon(void)
return 0;
}
static inline int olpc_has_vsa(void)
{
return 0;
}
#endif
extern int pci_olpc_init(void);
/* EC related functions */
extern int olpc_ec_cmd(unsigned char cmd, unsigned char *inbuf, size_t inlen,

1
arch/x86/include/asm/pci_x86.h
View File

@ -104,7 +104,6 @@ extern bool port_cf9_safe;
extern int pci_direct_probe(void);
extern void pci_direct_init(int type);
extern void pci_pcbios_init(void);
extern int pci_olpc_init(void);
extern void __init dmi_check_pciprobe(void);
extern void __init dmi_check_skip_isa_align(void);

10
arch/x86/kernel/olpc.c
View File

@ -17,7 +17,9 @@
#include <linux/spinlock.h>
#include <linux/io.h>
#include <linux/string.h>
#include <asm/geode.h>
#include <asm/setup.h>
#include <asm/olpc.h>
#ifdef CONFIG_OPEN_FIRMWARE
@ -243,9 +245,11 @@ static int __init olpc_init(void)
olpc_ec_cmd(EC_FIRMWARE_REV, NULL, 0,
(unsigned char *) &olpc_platform_info.ecver, 1);
/* check to see if the VSA exists */
if (cs5535_has_vsa2())
olpc_platform_info.flags |= OLPC_F_VSA;
#ifdef CONFIG_PCI_OLPC
/* If the VSA exists let it emulate PCI, if not emulate in kernel */
if (!cs5535_has_vsa2())
x86_init.pci.arch_init = pci_olpc_init;
#endif
printk(KERN_INFO "OLPC board revision %s%X (EC=%x)\n",
((olpc_platform_info.boardrev & 0xf) < 8) ? "pre" : "",

8
arch/x86/pci/init.c
View File

@ -1,6 +1,7 @@
#include <linux/pci.h>
#include <linux/init.h>
#include <asm/pci_x86.h>
#include <asm/x86_init.h>
/* arch_initcall has too random ordering, so call the initializers
in the right sequence from here. */
@ -15,10 +16,9 @@ static __init int pci_arch_init(void)
if (!(pci_probe & PCI_PROBE_NOEARLY))
pci_mmcfg_early_init();
#ifdef CONFIG_PCI_OLPC
if (!pci_olpc_init())
return 0; /* skip additional checks if it's an XO */
#endif
if (x86_init.pci.arch_init && !x86_init.pci.arch_init())
return 0;
#ifdef CONFIG_PCI_BIOS
pci_pcbios_init();
#endif

3
arch/x86/pci/olpc.c
View File

@ -304,9 +304,6 @@ static struct pci_raw_ops pci_olpc_conf = {
int __init pci_olpc_init(void)
{
if (!machine_is_olpc() || olpc_has_vsa())
return -ENODEV;
printk(KERN_INFO "PCI: Using configuration type OLPC\n");
raw_pci_ops = &pci_olpc_conf;
is_lx = is_geode_lx();