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Commit cca8209e authored by Linus Torvalds's avatar Linus Torvalds
Browse files

Merge branch 'x86-olpc-for-linus' of... 

Merge branch 'x86-olpc-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

* 'x86-olpc-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  x86, olpc: XO-1 uses/depends on PCI
  x86, olpc: Register XO-1 platform devices
  x86, olpc: Add XO-1 poweroff support
  x86, olpc: Don't retry EC commands forever
  x86, olpc: Rework BIOS signature check
  x86, olpc: Only enable PCI configuration type override on XO-1
parents d77bdc42 9e9006e9

arch/x86/Kconfig

+9 −2
Original line number Diff line number Diff line
@@ -1927,7 +1927,7 @@ config PCI_GODIRECT 
	bool "Direct"



config PCI_GOOLPC

	bool "OLPC"

	bool "OLPC XO-1"

	depends on OLPC



config PCI_GOANY
@@ -2088,14 +2088,21 @@ config SCx200HR_TIMER 
config OLPC

	bool "One Laptop Per Child support"

	select GPIOLIB

	select OLPC_OPENFIRMWARE

	---help---

	  Add support for detecting the unique features of the OLPC

	  XO hardware.



config OLPC_XO1

	tristate "OLPC XO-1 support"

	depends on OLPC && PCI

	---help---

	  Add support for non-essential features of the OLPC XO-1 laptop.



config OLPC_OPENFIRMWARE

	bool "Support for OLPC's Open Firmware"

	depends on !X86_64 && !X86_PAE

	default y if OLPC

	default n

	help

	  This option adds support for the implementation of Open Firmware

	  that is used on the OLPC XO-1 Children's Machine.

arch/x86/include/asm/olpc_ofw.h

+4 −0
Original line number Diff line number Diff line
@@ -21,10 +21,14 @@ extern void olpc_ofw_detect(void); 
/* install OFW's pde permanently into the kernel's pgtable */

extern void setup_olpc_ofw_pgd(void);



/* check if OFW was detected during boot */

extern bool olpc_ofw_present(void);



#else /* !CONFIG_OLPC_OPENFIRMWARE */



static inline void olpc_ofw_detect(void) { }

static inline void setup_olpc_ofw_pgd(void) { }

static inline bool olpc_ofw_present(void) { return false; }



#endif /* !CONFIG_OLPC_OPENFIRMWARE */

arch/x86/kernel/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -108,6 +108,7 @@ obj-$(CONFIG_SCx200) += scx200.o 
scx200-y			+= scx200_32.o



obj-$(CONFIG_OLPC)		+= olpc.o

obj-$(CONFIG_OLPC_XO1)		+= olpc-xo1.o

obj-$(CONFIG_OLPC_OPENFIRMWARE)	+= olpc_ofw.o

obj-$(CONFIG_X86_MRST)		+= mrst.o

arch/x86/kernel/olpc-xo1.c

0 → 100644
+140 −0
Original line number Diff line number Diff line 
/*

 * Support for features of the OLPC XO-1 laptop

 *

 * Copyright (C) 2010 One Laptop per Child

 * Copyright (C) 2006 Red Hat, Inc.

 * Copyright (C) 2006 Advanced Micro Devices, Inc.

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License as published by

 * the Free Software Foundation; either version 2 of the License, or

 * (at your option) any later version.

 */



#include <linux/module.h>

#include <linux/pci.h>

#include <linux/pci_ids.h>

#include <linux/platform_device.h>

#include <linux/pm.h>



#include <asm/io.h>

#include <asm/olpc.h>



#define DRV_NAME "olpc-xo1"



#define PMS_BAR		4

#define ACPI_BAR	5



/* PMC registers (PMS block) */

#define PM_SCLK		0x10

#define PM_IN_SLPCTL	0x20

#define PM_WKXD		0x34

#define PM_WKD		0x30

#define PM_SSC		0x54



/* PM registers (ACPI block) */

#define PM1_CNT		0x08

#define PM_GPE0_STS	0x18



static unsigned long acpi_base;

static unsigned long pms_base;



static void xo1_power_off(void)

{

	printk(KERN_INFO "OLPC XO-1 power off sequence...\n");



	/* Enable all of these controls with 0 delay */

	outl(0x40000000, pms_base + PM_SCLK);

	outl(0x40000000, pms_base + PM_IN_SLPCTL);

	outl(0x40000000, pms_base + PM_WKXD);

	outl(0x40000000, pms_base + PM_WKD);



	/* Clear status bits (possibly unnecessary) */

	outl(0x0002ffff, pms_base  + PM_SSC);

	outl(0xffffffff, acpi_base + PM_GPE0_STS);



	/* Write SLP_EN bit to start the machinery */

	outl(0x00002000, acpi_base + PM1_CNT);

}



/* Read the base addresses from the PCI BAR info */

static int __devinit setup_bases(struct pci_dev *pdev)

{

	int r;



	r = pci_enable_device_io(pdev);

	if (r) {

		dev_err(&pdev->dev, "can't enable device IO\n");

		return r;

	}



	r = pci_request_region(pdev, ACPI_BAR, DRV_NAME);

	if (r) {

		dev_err(&pdev->dev, "can't alloc PCI BAR #%d\n", ACPI_BAR);

		return r;

	}



	r = pci_request_region(pdev, PMS_BAR, DRV_NAME);

	if (r) {

		dev_err(&pdev->dev, "can't alloc PCI BAR #%d\n", PMS_BAR);

		pci_release_region(pdev, ACPI_BAR);

		return r;

	}



	acpi_base = pci_resource_start(pdev, ACPI_BAR);

	pms_base = pci_resource_start(pdev, PMS_BAR);



	return 0;

}



static int __devinit olpc_xo1_probe(struct platform_device *pdev)

{

	struct pci_dev *pcidev;

	int r;



	pcidev = pci_get_device(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_CS5536_ISA,

				NULL);

	if (!pdev)

		return -ENODEV;



	r = setup_bases(pcidev);

	if (r)

		return r;



	pm_power_off = xo1_power_off;



	printk(KERN_INFO "OLPC XO-1 support registered\n");

	return 0;

}



static int __devexit olpc_xo1_remove(struct platform_device *pdev)

{

	pm_power_off = NULL;

	return 0;

}



static struct platform_driver olpc_xo1_driver = {

	.driver = {

		.name = DRV_NAME,

		.owner = THIS_MODULE,

	},

	.probe = olpc_xo1_probe,

	.remove = __devexit_p(olpc_xo1_remove),

};



static int __init olpc_xo1_init(void)

{

	return platform_driver_register(&olpc_xo1_driver);

}



static void __exit olpc_xo1_exit(void)

{

	platform_driver_unregister(&olpc_xo1_driver);

}



MODULE_AUTHOR("Daniel Drake <dsd@laptop.org>");

MODULE_LICENSE("GPL");

MODULE_ALIAS("platform:olpc-xo1");



module_init(olpc_xo1_init);

module_exit(olpc_xo1_exit);

arch/x86/kernel/olpc.c

+55 −34
Original line number Diff line number Diff line
@@ -17,6 +17,7 @@ 
#include <linux/spinlock.h>

#include <linux/io.h>

#include <linux/string.h>

#include <linux/platform_device.h>



#include <asm/geode.h>

#include <asm/setup.h>
@@ -114,6 +115,7 @@ int olpc_ec_cmd(unsigned char cmd, unsigned char *inbuf, size_t inlen, 
	unsigned long flags;

	int ret = -EIO;

	int i;

	int restarts = 0;



	spin_lock_irqsave(&ec_lock, flags);
@@ -169,7 +171,9 @@ int olpc_ec_cmd(unsigned char cmd, unsigned char *inbuf, size_t inlen, 
			if (wait_on_obf(0x6c, 1)) {

				printk(KERN_ERR "olpc-ec:  timeout waiting for"

						" EC to provide data!\n");

				if (restarts++ < 10)

					goto restart;

				goto err;

			}

			outbuf[i] = inb(0x68);

			pr_devel("olpc-ec:  received 0x%x\n", outbuf[i]);
@@ -183,8 +187,21 @@ int olpc_ec_cmd(unsigned char cmd, unsigned char *inbuf, size_t inlen, 
}

EXPORT_SYMBOL_GPL(olpc_ec_cmd);



#ifdef CONFIG_OLPC_OPENFIRMWARE

static void __init platform_detect(void)

static bool __init check_ofw_architecture(void)

{

	size_t propsize;

	char olpc_arch[5];

	const void *args[] = { NULL, "architecture", olpc_arch, (void *)5 };

	void *res[] = { &propsize };



	if (olpc_ofw("getprop", args, res)) {

		printk(KERN_ERR "ofw: getprop call failed!\n");

		return false;

	}

	return propsize == 5 && strncmp("OLPC", olpc_arch, 5) == 0;

}



static u32 __init get_board_revision(void)

{

	size_t propsize;

	__be32 rev;
@@ -193,45 +210,43 @@ static void __init platform_detect(void) 


	if (olpc_ofw("getprop", args, res) || propsize != 4) {

		printk(KERN_ERR "ofw: getprop call failed!\n");

		rev = cpu_to_be32(0);

		return cpu_to_be32(0);

	}

	olpc_platform_info.boardrev = be32_to_cpu(rev);

	return be32_to_cpu(rev);

}

#else

static void __init platform_detect(void)



static bool __init platform_detect(void)

{

	/* stopgap until OFW support is added to the kernel */

	olpc_platform_info.boardrev = olpc_board(0xc2);

	if (!check_ofw_architecture())

		return false;

	olpc_platform_info.flags |= OLPC_F_PRESENT;

	olpc_platform_info.boardrev = get_board_revision();

	return true;

}

#endif



static int __init olpc_init(void)

static int __init add_xo1_platform_devices(void)

{

	unsigned char *romsig;

	struct platform_device *pdev;



	/* The ioremap check is dangerous; limit what we run it on */

	if (!is_geode() || cs5535_has_vsa2())

		return 0;

	pdev = platform_device_register_simple("xo1-rfkill", -1, NULL, 0);

	if (IS_ERR(pdev))

		return PTR_ERR(pdev);



	spin_lock_init(&ec_lock);

	pdev = platform_device_register_simple("olpc-xo1", -1, NULL, 0);

	if (IS_ERR(pdev))

		return PTR_ERR(pdev);



	romsig = ioremap(0xffffffc0, 16);

	if (!romsig)

	return 0;



	if (strncmp(romsig, "CL1   Q", 7))

		goto unmap;

	if (strncmp(romsig+6, romsig+13, 3)) {

		printk(KERN_INFO "OLPC BIOS signature looks invalid.  "

				"Assuming not OLPC\n");

		goto unmap;

}



	printk(KERN_INFO "OLPC board with OpenFirmware %.16s\n", romsig);

	olpc_platform_info.flags |= OLPC_F_PRESENT;

static int __init olpc_init(void)

{

	int r = 0;



	if (!olpc_ofw_present() || !platform_detect())

		return 0;



	/* get the platform revision */

	platform_detect();

	spin_lock_init(&ec_lock);



	/* assume B1 and above models always have a DCON */

	if (olpc_board_at_least(olpc_board(0xb1)))
@@ -242,8 +257,10 @@ static int __init olpc_init(void) 
			(unsigned char *) &olpc_platform_info.ecver, 1);



#ifdef CONFIG_PCI_OLPC

	/* If the VSA exists let it emulate PCI, if not emulate in kernel */

	if (!cs5535_has_vsa2())

	/* If the VSA exists let it emulate PCI, if not emulate in kernel.

	 * XO-1 only. */

	if (olpc_platform_info.boardrev < olpc_board_pre(0xd0) &&

			!cs5535_has_vsa2())

		x86_init.pci.arch_init = pci_olpc_init;

#endif
@@ -252,8 +269,12 @@ static int __init olpc_init(void) 
			olpc_platform_info.boardrev >> 4,

			olpc_platform_info.ecver);



unmap:

	iounmap(romsig);

	if (olpc_platform_info.boardrev < olpc_board_pre(0xd0)) { /* XO-1 */

		r = add_xo1_platform_devices();

		if (r)

			return r;

	}



	return 0;

}