summaryrefslogtreecommitdiff
path: root/arch/mips/mti-malta/malta-pm.c
diff options
context:
space:
mode:
Diffstat (limited to 'arch/mips/mti-malta/malta-pm.c')
-rw-r--r--arch/mips/mti-malta/malta-pm.c96
1 files changed, 0 insertions, 96 deletions
diff --git a/arch/mips/mti-malta/malta-pm.c b/arch/mips/mti-malta/malta-pm.c
deleted file mode 100644
index efbd659fb602..000000000000
--- a/arch/mips/mti-malta/malta-pm.c
+++ /dev/null
@@ -1,96 +0,0 @@
-/*
- * Copyright (C) 2014 Imagination Technologies
- * Author: Paul Burton <paul.burton@mips.com>
- *
- * 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/delay.h>
-#include <linux/init.h>
-#include <linux/io.h>
-#include <linux/pci.h>
-
-#include <asm/mach-malta/malta-pm.h>
-
-static struct pci_bus *pm_pci_bus;
-static resource_size_t pm_io_offset;
-
-int mips_pm_suspend(unsigned state)
-{
- int spec_devid;
- u16 sts;
-
- if (!pm_pci_bus || !pm_io_offset)
- return -ENODEV;
-
- /* Ensure the power button status is clear */
- while (1) {
- sts = inw(pm_io_offset + PIIX4_FUNC3IO_PMSTS);
- if (!(sts & PIIX4_FUNC3IO_PMSTS_PWRBTN_STS))
- break;
- outw(sts, pm_io_offset + PIIX4_FUNC3IO_PMSTS);
- }
-
- /* Enable entry to suspend */
- outw(state | PIIX4_FUNC3IO_PMCNTRL_SUS_EN,
- pm_io_offset + PIIX4_FUNC3IO_PMCNTRL);
-
- /* If the special cycle occurs too soon this doesn't work... */
- mdelay(10);
-
- /*
- * The PIIX4 will enter the suspend state only after seeing a special
- * cycle with the correct magic data on the PCI bus. Generate that
- * cycle now.
- */
- spec_devid = PCI_DEVID(0, PCI_DEVFN(0x1f, 0x7));
- pci_bus_write_config_dword(pm_pci_bus, spec_devid, 0,
- PIIX4_SUSPEND_MAGIC);
-
- /* Give the system some time to power down */
- mdelay(1000);
-
- return 0;
-}
-
-static int __init malta_pm_setup(void)
-{
- struct pci_dev *dev;
- int res, io_region = PCI_BRIDGE_RESOURCES;
-
- /* Find a reference to the PCI bus */
- pm_pci_bus = pci_find_next_bus(NULL);
- if (!pm_pci_bus) {
- pr_warn("malta-pm: failed to find reference to PCI bus\n");
- return -ENODEV;
- }
-
- /* Find the PIIX4 PM device */
- dev = pci_get_subsys(PCI_VENDOR_ID_INTEL,
- PCI_DEVICE_ID_INTEL_82371AB_3, PCI_ANY_ID,
- PCI_ANY_ID, NULL);
- if (!dev) {
- pr_warn("malta-pm: failed to find PIIX4 PM\n");
- return -ENODEV;
- }
-
- /* Request access to the PIIX4 PM IO registers */
- res = pci_request_region(dev, io_region, "PIIX4 PM IO registers");
- if (res) {
- pr_warn("malta-pm: failed to request PM IO registers (%d)\n",
- res);
- pci_dev_put(dev);
- return -ENODEV;
- }
-
- /* Find the offset to the PIIX4 PM IO registers */
- pm_io_offset = pci_resource_start(dev, io_region);
-
- pci_dev_put(dev);
- return 0;
-}
-
-late_initcall(malta_pm_setup);