Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / drivers / staging / nvec / nvec_ps2.c

diff --git a/kernel/drivers/staging/nvec/nvec_ps2.c b/kernel/drivers/staging/nvec/nvec_ps2.c
new file mode 100644 (file)
index 0000000..6ebbc82
--- /dev/null
+++ b/kernel/drivers/staging/nvec/nvec_ps2.c
@@ -0,0 +1,189 @@
+/*
+ * nvec_ps2: mouse driver for a NVIDIA compliant embedded controller
+ *
+ * Copyright (C) 2011 The AC100 Kernel Team <ac100@lists.launchpad.net>
+ *
+ * Authors:  Pierre-Hugues Husson <phhusson@free.fr>
+ *           Ilya Petrov <ilya.muromec@gmail.com>
+ *           Marc Dietrich <marvin24@gmx.de>
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/serio.h>
+#include <linux/delay.h>
+#include <linux/platform_device.h>
+
+#include "nvec.h"
+
+#define PACKET_SIZE    6
+
+#define ENABLE_MOUSE   0xf4
+#define DISABLE_MOUSE  0xf5
+#define PSMOUSE_RST    0xff
+
+#ifdef NVEC_PS2_DEBUG
+#define NVEC_PHD(str, buf, len) \
+       print_hex_dump(KERN_DEBUG, str, DUMP_PREFIX_NONE, \
+                       16, 1, buf, len, false)
+#else
+#define NVEC_PHD(str, buf, len)
+#endif
+
+enum ps2_subcmds {
+       SEND_COMMAND = 1,
+       RECEIVE_N,
+       AUTO_RECEIVE_N,
+       CANCEL_AUTO_RECEIVE,
+};
+
+struct nvec_ps2 {
+       struct serio *ser_dev;
+       struct notifier_block notifier;
+       struct nvec_chip *nvec;
+};
+
+static struct nvec_ps2 ps2_dev;
+
+static int ps2_startstreaming(struct serio *ser_dev)
+{
+       unsigned char buf[] = { NVEC_PS2, AUTO_RECEIVE_N, PACKET_SIZE };
+
+       return nvec_write_async(ps2_dev.nvec, buf, sizeof(buf));
+}
+
+static void ps2_stopstreaming(struct serio *ser_dev)
+{
+       unsigned char buf[] = { NVEC_PS2, CANCEL_AUTO_RECEIVE };
+
+       nvec_write_async(ps2_dev.nvec, buf, sizeof(buf));
+}
+
+static int ps2_sendcommand(struct serio *ser_dev, unsigned char cmd)
+{
+       unsigned char buf[] = { NVEC_PS2, SEND_COMMAND, ENABLE_MOUSE, 1 };
+
+       buf[2] = cmd & 0xff;
+
+       dev_dbg(&ser_dev->dev, "Sending ps2 cmd %02x\n", cmd);
+       return nvec_write_async(ps2_dev.nvec, buf, sizeof(buf));
+}
+
+static int nvec_ps2_notifier(struct notifier_block *nb,
+                            unsigned long event_type, void *data)
+{
+       int i;
+       unsigned char *msg = (unsigned char *)data;
+
+       switch (event_type) {
+       case NVEC_PS2_EVT:
+               for (i = 0; i < msg[1]; i++)
+                       serio_interrupt(ps2_dev.ser_dev, msg[2 + i], 0);
+               NVEC_PHD("ps/2 mouse event: ", &msg[2], msg[1]);
+               return NOTIFY_STOP;
+
+       case NVEC_PS2:
+               if (msg[2] == 1) {
+                       for (i = 0; i < (msg[1] - 2); i++)
+                               serio_interrupt(ps2_dev.ser_dev, msg[i + 4], 0);
+                       NVEC_PHD("ps/2 mouse reply: ", &msg[4], msg[1] - 2);
+               }
+
+               else if (msg[1] != 2) /* !ack */
+                       NVEC_PHD("unhandled mouse event: ", msg, msg[1] + 2);
+               return NOTIFY_STOP;
+       }
+
+       return NOTIFY_DONE;
+}
+
+static int nvec_mouse_probe(struct platform_device *pdev)
+{
+       struct nvec_chip *nvec = dev_get_drvdata(pdev->dev.parent);
+       struct serio *ser_dev;
+       char mouse_reset[] = { NVEC_PS2, SEND_COMMAND, PSMOUSE_RST, 3 };
+
+       ser_dev = devm_kzalloc(&pdev->dev, sizeof(struct serio), GFP_KERNEL);
+       if (!ser_dev)
+               return -ENOMEM;
+
+       ser_dev->id.type = SERIO_PS_PSTHRU;
+       ser_dev->write = ps2_sendcommand;
+       ser_dev->start = ps2_startstreaming;
+       ser_dev->stop = ps2_stopstreaming;
+
+       strlcpy(ser_dev->name, "nvec mouse", sizeof(ser_dev->name));
+       strlcpy(ser_dev->phys, "nvec", sizeof(ser_dev->phys));
+
+       ps2_dev.ser_dev = ser_dev;
+       ps2_dev.notifier.notifier_call = nvec_ps2_notifier;
+       ps2_dev.nvec = nvec;
+       nvec_register_notifier(nvec, &ps2_dev.notifier, 0);
+
+       serio_register_port(ser_dev);
+
+       /* mouse reset */
+       nvec_write_async(nvec, mouse_reset, sizeof(mouse_reset));
+
+       return 0;
+}
+
+static int nvec_mouse_remove(struct platform_device *pdev)
+{
+       struct nvec_chip *nvec = dev_get_drvdata(pdev->dev.parent);
+
+       ps2_sendcommand(ps2_dev.ser_dev, DISABLE_MOUSE);
+       ps2_stopstreaming(ps2_dev.ser_dev);
+       nvec_unregister_notifier(nvec, &ps2_dev.notifier);
+       serio_unregister_port(ps2_dev.ser_dev);
+
+       return 0;
+}
+
+#ifdef CONFIG_PM_SLEEP
+static int nvec_mouse_suspend(struct device *dev)
+{
+       /* disable mouse */
+       ps2_sendcommand(ps2_dev.ser_dev, DISABLE_MOUSE);
+
+       /* send cancel autoreceive */
+       ps2_stopstreaming(ps2_dev.ser_dev);
+
+       return 0;
+}
+
+static int nvec_mouse_resume(struct device *dev)
+{
+       /* start streaming */
+       ps2_startstreaming(ps2_dev.ser_dev);
+
+       /* enable mouse */
+       ps2_sendcommand(ps2_dev.ser_dev, ENABLE_MOUSE);
+
+       return 0;
+}
+#endif
+
+static const SIMPLE_DEV_PM_OPS(nvec_mouse_pm_ops, nvec_mouse_suspend,
+                               nvec_mouse_resume);
+
+static struct platform_driver nvec_mouse_driver = {
+       .probe  = nvec_mouse_probe,
+       .remove = nvec_mouse_remove,
+       .driver = {
+               .name = "nvec-mouse",
+               .pm = &nvec_mouse_pm_ops,
+       },
+};
+
+module_platform_driver(nvec_mouse_driver);
+
+MODULE_DESCRIPTION("NVEC mouse driver");
+MODULE_AUTHOR("Marc Dietrich <marvin24@gmx.de>");
+MODULE_ALIAS("platform:nvec-mouse");
+MODULE_LICENSE("GPL");