1 files changed, 103 insertions, 0 deletions
diff --git a/drivers/staging/nvec/nvec_ps2.c b/drivers/staging/nvec/nvec_ps2.c
new file mode 100644
index 000000000000..6bb9430f3521
--- /dev/null
+++ b/drivers/staging/nvec/nvec_ps2.c
@@ -0,0 +1,103 @@
+#include <linux/slab.h>
+#include <linux/serio.h>
+#include <linux/delay.h>
+#include "nvec.h"
+
+#define START_STREAMING	{'\x06','\x03','\x01'}
+#define STOP_STREAMING	{'\x06','\x04'}
+#define SEND_COMMAND	{'\x06','\x01','\xf4','\x01'}
+
+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[] = START_STREAMING;
+	nvec_write_async(ps2_dev.nvec, buf, sizeof(buf));
+	return 0;
+}
+
+static void ps2_stopstreaming(struct serio *ser_dev)
+{
+	unsigned char buf[] = STOP_STREAMING;
+	nvec_write_async(ps2_dev.nvec, buf, sizeof(buf));
+}
+
+/* is this really needed?
+static void nvec_resp_handler(unsigned char *data) {
+	serio_interrupt(ser_dev, data[4], 0);
+}
+*/
+
+static int ps2_sendcommand(struct serio *ser_dev, unsigned char cmd)
+{
+	unsigned char buf[] = SEND_COMMAND;
+
+	buf[2] = cmd & 0xff;
+
+	dev_dbg(&ser_dev->dev, "Sending ps2 cmd %02x\n", cmd);
+	nvec_write_async(ps2_dev.nvec, buf, sizeof(buf));
+
+	return 0;
+}
+
+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:
+			serio_interrupt(ps2_dev.ser_dev, msg[2], 0);
+			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);
+			else if (msg[1] != 2) /* !ack */
+			{
+				printk("nvec_ps2: unhandled mouse event ");
+				for(i = 0; i <= (msg[1]+1); i++)
+					printk("%02x ", msg[i]);
+				printk(".\n");
+			}
+
+			return NOTIFY_STOP;
+	}
+
+	return NOTIFY_DONE;
+}
+
+
+int __init nvec_ps2(struct nvec_chip *nvec)
+{
+	struct serio *ser_dev = kzalloc(sizeof(struct serio), GFP_KERNEL);
+
+	ser_dev->id.type=SERIO_8042;
+	ser_dev->write=ps2_sendcommand;
+	ser_dev->open=ps2_startstreaming;
+	ser_dev->close=ps2_stopstreaming;
+
+	strlcpy(ser_dev->name, "NVEC PS2", sizeof(ser_dev->name));
+	strlcpy(ser_dev->phys, "NVEC I2C slave", 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, "\x06\x01\xff\x03", 4);
+
+	return 0;
+}