x86, olpc: Add XO-1 poweroff support (bf1ebf00) · Commits · 戴 / test

arch/x86/Kconfig

+6 −0

Original line number	Diff line number	Diff line
		@@ -2066,6 +2066,12 @@ config OLPC
		Add support for detecting the unique features of the OLPC
		XO hardware.

		config OLPC_XO1
		tristate "OLPC XO-1 support"
		depends on OLPC
		---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

arch/x86/kernel/Makefile

+1 −0

Original line number	Diff line number	Diff line
		@@ -104,6 +104,7 @@ 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);

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