[Feature]add MT2731_MP2_MR2_SVN388 baseline version
Change-Id: Ief04314834b31e27effab435d3ca8ba33b499059
diff --git a/src/kernel/linux/v4.14/drivers/input/serio/ambakmi.c b/src/kernel/linux/v4.14/drivers/input/serio/ambakmi.c
new file mode 100644
index 0000000..ff3875c
--- /dev/null
+++ b/src/kernel/linux/v4.14/drivers/input/serio/ambakmi.c
@@ -0,0 +1,215 @@
+/*
+ * linux/drivers/input/serio/ambakmi.c
+ *
+ * Copyright (C) 2000-2003 Deep Blue Solutions Ltd.
+ * Copyright (C) 2002 Russell King.
+ *
+ * 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/serio.h>
+#include <linux/errno.h>
+#include <linux/interrupt.h>
+#include <linux/ioport.h>
+#include <linux/device.h>
+#include <linux/delay.h>
+#include <linux/slab.h>
+#include <linux/err.h>
+#include <linux/amba/bus.h>
+#include <linux/amba/kmi.h>
+#include <linux/clk.h>
+
+#include <asm/io.h>
+#include <asm/irq.h>
+
+#define KMI_BASE (kmi->base)
+
+struct amba_kmi_port {
+ struct serio *io;
+ struct clk *clk;
+ void __iomem *base;
+ unsigned int irq;
+ unsigned int divisor;
+ unsigned int open;
+};
+
+static irqreturn_t amba_kmi_int(int irq, void *dev_id)
+{
+ struct amba_kmi_port *kmi = dev_id;
+ unsigned int status = readb(KMIIR);
+ int handled = IRQ_NONE;
+
+ while (status & KMIIR_RXINTR) {
+ serio_interrupt(kmi->io, readb(KMIDATA), 0);
+ status = readb(KMIIR);
+ handled = IRQ_HANDLED;
+ }
+
+ return handled;
+}
+
+static int amba_kmi_write(struct serio *io, unsigned char val)
+{
+ struct amba_kmi_port *kmi = io->port_data;
+ unsigned int timeleft = 10000; /* timeout in 100ms */
+
+ while ((readb(KMISTAT) & KMISTAT_TXEMPTY) == 0 && --timeleft)
+ udelay(10);
+
+ if (timeleft)
+ writeb(val, KMIDATA);
+
+ return timeleft ? 0 : SERIO_TIMEOUT;
+}
+
+static int amba_kmi_open(struct serio *io)
+{
+ struct amba_kmi_port *kmi = io->port_data;
+ unsigned int divisor;
+ int ret;
+
+ ret = clk_prepare_enable(kmi->clk);
+ if (ret)
+ goto out;
+
+ divisor = clk_get_rate(kmi->clk) / 8000000 - 1;
+ writeb(divisor, KMICLKDIV);
+ writeb(KMICR_EN, KMICR);
+
+ ret = request_irq(kmi->irq, amba_kmi_int, IRQF_SHARED, "kmi-pl050",
+ kmi);
+ if (ret) {
+ printk(KERN_ERR "kmi: failed to claim IRQ%d\n", kmi->irq);
+ writeb(0, KMICR);
+ goto clk_disable;
+ }
+
+ writeb(KMICR_EN | KMICR_RXINTREN, KMICR);
+
+ return 0;
+
+ clk_disable:
+ clk_disable_unprepare(kmi->clk);
+ out:
+ return ret;
+}
+
+static void amba_kmi_close(struct serio *io)
+{
+ struct amba_kmi_port *kmi = io->port_data;
+
+ writeb(0, KMICR);
+
+ free_irq(kmi->irq, kmi);
+ clk_disable_unprepare(kmi->clk);
+}
+
+static int amba_kmi_probe(struct amba_device *dev,
+ const struct amba_id *id)
+{
+ struct amba_kmi_port *kmi;
+ struct serio *io;
+ int ret;
+
+ ret = amba_request_regions(dev, NULL);
+ if (ret)
+ return ret;
+
+ kmi = kzalloc(sizeof(struct amba_kmi_port), GFP_KERNEL);
+ io = kzalloc(sizeof(struct serio), GFP_KERNEL);
+ if (!kmi || !io) {
+ ret = -ENOMEM;
+ goto out;
+ }
+
+
+ io->id.type = SERIO_8042;
+ io->write = amba_kmi_write;
+ io->open = amba_kmi_open;
+ io->close = amba_kmi_close;
+ strlcpy(io->name, dev_name(&dev->dev), sizeof(io->name));
+ strlcpy(io->phys, dev_name(&dev->dev), sizeof(io->phys));
+ io->port_data = kmi;
+ io->dev.parent = &dev->dev;
+
+ kmi->io = io;
+ kmi->base = ioremap(dev->res.start, resource_size(&dev->res));
+ if (!kmi->base) {
+ ret = -ENOMEM;
+ goto out;
+ }
+
+ kmi->clk = clk_get(&dev->dev, "KMIREFCLK");
+ if (IS_ERR(kmi->clk)) {
+ ret = PTR_ERR(kmi->clk);
+ goto unmap;
+ }
+
+ kmi->irq = dev->irq[0];
+ amba_set_drvdata(dev, kmi);
+
+ serio_register_port(kmi->io);
+ return 0;
+
+ unmap:
+ iounmap(kmi->base);
+ out:
+ kfree(kmi);
+ kfree(io);
+ amba_release_regions(dev);
+ return ret;
+}
+
+static int amba_kmi_remove(struct amba_device *dev)
+{
+ struct amba_kmi_port *kmi = amba_get_drvdata(dev);
+
+ serio_unregister_port(kmi->io);
+ clk_put(kmi->clk);
+ iounmap(kmi->base);
+ kfree(kmi);
+ amba_release_regions(dev);
+ return 0;
+}
+
+static int __maybe_unused amba_kmi_resume(struct device *dev)
+{
+ struct amba_kmi_port *kmi = dev_get_drvdata(dev);
+
+ /* kick the serio layer to rescan this port */
+ serio_reconnect(kmi->io);
+
+ return 0;
+}
+
+static SIMPLE_DEV_PM_OPS(amba_kmi_dev_pm_ops, NULL, amba_kmi_resume);
+
+static const struct amba_id amba_kmi_idtable[] = {
+ {
+ .id = 0x00041050,
+ .mask = 0x000fffff,
+ },
+ { 0, 0 }
+};
+
+MODULE_DEVICE_TABLE(amba, amba_kmi_idtable);
+
+static struct amba_driver ambakmi_driver = {
+ .drv = {
+ .name = "kmi-pl050",
+ .owner = THIS_MODULE,
+ .pm = &amba_kmi_dev_pm_ops,
+ },
+ .id_table = amba_kmi_idtable,
+ .probe = amba_kmi_probe,
+ .remove = amba_kmi_remove,
+};
+
+module_amba_driver(ambakmi_driver);
+
+MODULE_AUTHOR("Russell King <rmk@arm.linux.org.uk>");
+MODULE_DESCRIPTION("AMBA KMI controller driver");
+MODULE_LICENSE("GPL");