[Feature]add MT2731_MP2_MR2_SVN388 baseline version
Change-Id: Ief04314834b31e27effab435d3ca8ba33b499059
diff --git a/src/kernel/linux/v4.14/drivers/power/reset/piix4-poweroff.c b/src/kernel/linux/v4.14/drivers/power/reset/piix4-poweroff.c
new file mode 100644
index 0000000..20ce3ff
--- /dev/null
+++ b/src/kernel/linux/v4.14/drivers/power/reset/piix4-poweroff.c
@@ -0,0 +1,113 @@
+/*
+ * Copyright (C) 2016 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/io.h>
+#include <linux/module.h>
+#include <linux/pci.h>
+#include <linux/pm.h>
+
+static struct pci_dev *pm_dev;
+static resource_size_t io_offset;
+
+enum piix4_pm_io_reg {
+ PIIX4_FUNC3IO_PMSTS = 0x00,
+#define PIIX4_FUNC3IO_PMSTS_PWRBTN_STS BIT(8)
+ PIIX4_FUNC3IO_PMCNTRL = 0x04,
+#define PIIX4_FUNC3IO_PMCNTRL_SUS_EN BIT(13)
+#define PIIX4_FUNC3IO_PMCNTRL_SUS_TYP_SOFF (0x0 << 10)
+};
+
+#define PIIX4_SUSPEND_MAGIC 0x00120002
+
+static const int piix4_pm_io_region = PCI_BRIDGE_RESOURCES;
+
+static void piix4_poweroff(void)
+{
+ int spec_devid;
+ u16 sts;
+
+ /* Ensure the power button status is clear */
+ while (1) {
+ sts = inw(io_offset + PIIX4_FUNC3IO_PMSTS);
+ if (!(sts & PIIX4_FUNC3IO_PMSTS_PWRBTN_STS))
+ break;
+ outw(sts, io_offset + PIIX4_FUNC3IO_PMSTS);
+ }
+
+ /* Enable entry to suspend */
+ outw(PIIX4_FUNC3IO_PMCNTRL_SUS_TYP_SOFF | PIIX4_FUNC3IO_PMCNTRL_SUS_EN,
+ 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_dev->bus, spec_devid, 0,
+ PIIX4_SUSPEND_MAGIC);
+
+ /* Give the system some time to power down, then error */
+ mdelay(1000);
+ pr_emerg("Unable to poweroff system\n");
+}
+
+static int piix4_poweroff_probe(struct pci_dev *dev,
+ const struct pci_device_id *id)
+{
+ int res;
+
+ if (pm_dev)
+ return -EINVAL;
+
+ /* Request access to the PIIX4 PM IO registers */
+ res = pci_request_region(dev, piix4_pm_io_region,
+ "PIIX4 PM IO registers");
+ if (res) {
+ dev_err(&dev->dev, "failed to request PM IO registers: %d\n",
+ res);
+ return res;
+ }
+
+ pm_dev = dev;
+ io_offset = pci_resource_start(dev, piix4_pm_io_region);
+ pm_power_off = piix4_poweroff;
+
+ return 0;
+}
+
+static void piix4_poweroff_remove(struct pci_dev *dev)
+{
+ if (pm_power_off == piix4_poweroff)
+ pm_power_off = NULL;
+
+ pci_release_region(dev, piix4_pm_io_region);
+ pm_dev = NULL;
+}
+
+static const struct pci_device_id piix4_poweroff_ids[] = {
+ { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82371AB_3) },
+ { 0 },
+};
+
+static struct pci_driver piix4_poweroff_driver = {
+ .name = "piix4-poweroff",
+ .id_table = piix4_poweroff_ids,
+ .probe = piix4_poweroff_probe,
+ .remove = piix4_poweroff_remove,
+};
+
+module_pci_driver(piix4_poweroff_driver);
+MODULE_AUTHOR("Paul Burton <paul.burton@mips.com>");
+MODULE_LICENSE("GPL");