[PATCH] USB: add driver for ATI/Philips USB RF remotes

Summary: Driver for ATI/Philips USB RF remotes

This is a new input driver for ATI/Philips USB RF remotes (eg. ATI
Remote Wonder II).

Signed-off-by: Ville Syrjälä <syrjala@sci.fi>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 477 insertions, 0 deletions

diff --git a/drivers/usb/input/ati_remote2.c b/drivers/usb/input/ati_remote2.c
new file mode 100644
index 000000000000..ab1a1ae24be9
--- /dev/null
+++ b/drivers/usb/input/ati_remote2.c
@@ -0,0 +1,477 @@
+/*
+ * ati_remote2 - ATI/Philips USB RF remote driver
+ *
+ * Copyright (C) 2005 Ville Syrjala <syrjala@sci.fi>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2
+ * as published by the Free Software Foundation.
+ */
+
+#include <linux/usb_input.h>
+
+#define DRIVER_DESC    "ATI/Philips USB RF remote driver"
+#define DRIVER_VERSION "0.1"
+
+MODULE_DESCRIPTION(DRIVER_DESC);
+MODULE_VERSION(DRIVER_VERSION);
+MODULE_AUTHOR("Ville Syrjala <syrjala@sci.fi>");
+MODULE_LICENSE("GPL");
+
+static unsigned int mode_mask = 0x1F;
+module_param(mode_mask, uint, 0644);
+MODULE_PARM_DESC(mode_mask, "Bitmask of modes to accept <4:PC><3:AUX4><2:AUX3><1:AUX2><0:AUX1>");
+
+static struct usb_device_id ati_remote2_id_table[] = {
+	{ USB_DEVICE(0x0471, 0x0602) },	/* ATI Remote Wonder II */
+	{ }
+};
+MODULE_DEVICE_TABLE(usb, ati_remote2_id_table);
+
+static struct {
+	int hw_code;
+	int key_code;
+} ati_remote2_key_table[] = {
+	{ 0x00, KEY_0 },
+	{ 0x01, KEY_1 },
+	{ 0x02, KEY_2 },
+	{ 0x03, KEY_3 },
+	{ 0x04, KEY_4 },
+	{ 0x05, KEY_5 },
+	{ 0x06, KEY_6 },
+	{ 0x07, KEY_7 },
+	{ 0x08, KEY_8 },
+	{ 0x09, KEY_9 },
+	{ 0x0c, KEY_POWER },
+	{ 0x0d, KEY_MUTE },
+	{ 0x10, KEY_VOLUMEUP },
+	{ 0x11, KEY_VOLUMEDOWN },
+	{ 0x20, KEY_CHANNELUP },
+	{ 0x21, KEY_CHANNELDOWN },
+	{ 0x28, KEY_FORWARD },
+	{ 0x29, KEY_REWIND },
+	{ 0x2c, KEY_PLAY },
+	{ 0x30, KEY_PAUSE },
+	{ 0x31, KEY_STOP },
+	{ 0x37, KEY_RECORD },
+	{ 0x38, KEY_DVD },
+	{ 0x39, KEY_TV },
+	{ 0x54, KEY_MENU },
+	{ 0x58, KEY_UP },
+	{ 0x59, KEY_DOWN },
+	{ 0x5a, KEY_LEFT },
+	{ 0x5b, KEY_RIGHT },
+	{ 0x5c, KEY_OK },
+	{ 0x78, KEY_A },
+	{ 0x79, KEY_B },
+	{ 0x7a, KEY_C },
+	{ 0x7b, KEY_D },
+	{ 0x7c, KEY_E },
+	{ 0x7d, KEY_F },
+	{ 0x82, KEY_ENTER },
+	{ 0x8e, KEY_VENDOR },
+	{ 0x96, KEY_COFFEE },
+	{ 0xa9, BTN_LEFT },
+	{ 0xaa, BTN_RIGHT },
+	{ 0xbe, KEY_QUESTION },
+	{ 0xd5, KEY_FRONT },
+	{ 0xd0, KEY_EDIT },
+	{ 0xf9, KEY_INFO },
+	{ (0x00 << 8) | 0x3f, KEY_PROG1 },
+	{ (0x01 << 8) | 0x3f, KEY_PROG2 },
+	{ (0x02 << 8) | 0x3f, KEY_PROG3 },
+	{ (0x03 << 8) | 0x3f, KEY_PROG4 },
+	{ (0x04 << 8) | 0x3f, KEY_PC },
+	{ 0, KEY_RESERVED }
+};
+
+struct ati_remote2 {
+	struct input_dev *idev;
+	struct usb_device *udev;
+
+	struct usb_interface *intf[2];
+	struct usb_endpoint_descriptor *ep[2];
+	struct urb *urb[2];
+	void *buf[2];
+	dma_addr_t buf_dma[2];
+
+	unsigned long jiffies;
+	int mode;
+
+	char name[64];
+	char phys[64];
+};
+
+static int ati_remote2_probe(struct usb_interface *interface, const struct usb_device_id *id);
+static void ati_remote2_disconnect(struct usb_interface *interface);
+
+static struct usb_driver ati_remote2_driver = {
+	.name       = "ati_remote2",
+	.probe      = ati_remote2_probe,
+	.disconnect = ati_remote2_disconnect,
+	.id_table   = ati_remote2_id_table,
+};
+
+static int ati_remote2_open(struct input_dev *idev)
+{
+	struct ati_remote2 *ar2 = idev->private;
+	int r;
+
+	r = usb_submit_urb(ar2->urb[0], GFP_KERNEL);
+	if (r) {
+		dev_err(&ar2->intf[0]->dev,
+			"%s: usb_submit_urb() = %d\n", __FUNCTION__, r);
+		return r;
+	}
+	r = usb_submit_urb(ar2->urb[1], GFP_KERNEL);
+	if (r) {
+		usb_kill_urb(ar2->urb[0]);
+		dev_err(&ar2->intf[1]->dev,
+			"%s: usb_submit_urb() = %d\n", __FUNCTION__, r);
+		return r;
+	}
+
+	return 0;
+}
+
+static void ati_remote2_close(struct input_dev *idev)
+{
+	struct ati_remote2 *ar2 = idev->private;
+
+	usb_kill_urb(ar2->urb[0]);
+	usb_kill_urb(ar2->urb[1]);
+}
+
+static void ati_remote2_input_mouse(struct ati_remote2 *ar2, struct pt_regs *regs)
+{
+	struct input_dev *idev = ar2->idev;
+	u8 *data = ar2->buf[0];
+
+	if (data[0] > 4) {
+		dev_err(&ar2->intf[0]->dev,
+			"Unknown mode byte (%02x %02x %02x %02x)\n",
+			data[3], data[2], data[1], data[0]);
+		return;
+	}
+
+	if (!((1 << data[0]) & mode_mask))
+		return;
+
+	input_regs(idev, regs);
+	input_event(idev, EV_REL, REL_X, (s8) data[1]);
+	input_event(idev, EV_REL, REL_Y, (s8) data[2]);
+	input_sync(idev);
+}
+
+static int ati_remote2_lookup(unsigned int hw_code)
+{
+	int i;
+
+	for (i = 0; ati_remote2_key_table[i].key_code != KEY_RESERVED; i++)
+		if (ati_remote2_key_table[i].hw_code == hw_code)
+			return i;
+
+	return -1;
+}
+
+static void ati_remote2_input_key(struct ati_remote2 *ar2, struct pt_regs *regs)
+{
+	struct input_dev *idev = ar2->idev;
+	u8 *data = ar2->buf[1];
+	int hw_code, index;
+
+	if (data[0] > 4) {
+		dev_err(&ar2->intf[1]->dev,
+			"Unknown mode byte (%02x %02x %02x %02x)\n",
+			data[3], data[2], data[1], data[0]);
+		return;
+	}
+
+	hw_code = data[2];
+	/*
+	 * Mode keys (AUX1-AUX4, PC) all generate the same code byte.
+	 * Use the mode byte to figure out which one was pressed.
+	 */
+	if (hw_code == 0x3f) {
+		/*
+		 * For some incomprehensible reason the mouse pad generates
+		 * events which look identical to the events from the last
+		 * pressed mode key. Naturally we don't want to generate key
+		 * events for the mouse pad so we filter out any subsequent
+		 * events from the same mode key.
+		 */
+		if (ar2->mode == data[0])
+			return;
+
+		if (data[1] == 0)
+			ar2->mode = data[0];
+
+		hw_code |= data[0] << 8;
+	}
+
+	if (!((1 << data[0]) & mode_mask))
+		return;
+
+	index = ati_remote2_lookup(hw_code);
+	if (index < 0) {
+		dev_err(&ar2->intf[1]->dev,
+			"Unknown code byte (%02x %02x %02x %02x)\n",
+			data[3], data[2], data[1], data[0]);
+		return;
+	}
+
+	switch (data[1]) {
+	case 0:	/* release */
+		break;
+	case 1:	/* press */
+		ar2->jiffies = jiffies + msecs_to_jiffies(idev->rep[REP_DELAY]);
+		break;
+	case 2:	/* repeat */
+
+		/* No repeat for mouse buttons. */
+		if (ati_remote2_key_table[index].key_code == BTN_LEFT ||
+		    ati_remote2_key_table[index].key_code == BTN_RIGHT)
+			return;
+
+		if (!time_after_eq(jiffies, ar2->jiffies))
+			return;
+
+		ar2->jiffies = jiffies + msecs_to_jiffies(idev->rep[REP_PERIOD]);
+		break;
+	default:
+		dev_err(&ar2->intf[1]->dev,
+			"Unknown state byte (%02x %02x %02x %02x)\n",
+			data[3], data[2], data[1], data[0]);
+		return;
+	}
+
+	input_regs(idev, regs);
+	input_event(idev, EV_KEY, ati_remote2_key_table[index].key_code, data[1]);
+	input_sync(idev);
+}
+
+static void ati_remote2_complete_mouse(struct urb *urb, struct pt_regs *regs)
+{
+	struct ati_remote2 *ar2 = urb->context;
+	int r;
+
+	switch (urb->status) {
+	case 0:
+		ati_remote2_input_mouse(ar2, regs);
+		break;
+	case -ENOENT:
+	case -EILSEQ:
+	case -ECONNRESET:
+	case -ESHUTDOWN:
+		dev_dbg(&ar2->intf[0]->dev,
+			"%s(): urb status = %d\n", __FUNCTION__, urb->status);
+		return;
+	default:
+		dev_err(&ar2->intf[0]->dev,
+			"%s(): urb status = %d\n", __FUNCTION__, urb->status);
+	}
+
+	r = usb_submit_urb(urb, GFP_ATOMIC);
+	if (r)
+		dev_err(&ar2->intf[0]->dev,
+			"%s(): usb_submit_urb() = %d\n", __FUNCTION__, r);
+}
+
+static void ati_remote2_complete_key(struct urb *urb, struct pt_regs *regs)
+{
+	struct ati_remote2 *ar2 = urb->context;
+	int r;
+
+	switch (urb->status) {
+	case 0:
+		ati_remote2_input_key(ar2, regs);
+		break;
+	case -ENOENT:
+	case -EILSEQ:
+	case -ECONNRESET:
+	case -ESHUTDOWN:
+		dev_dbg(&ar2->intf[1]->dev,
+			"%s(): urb status = %d\n", __FUNCTION__, urb->status);
+		return;
+	default:
+		dev_err(&ar2->intf[1]->dev,
+			"%s(): urb status = %d\n", __FUNCTION__, urb->status);
+	}
+
+	r = usb_submit_urb(urb, GFP_ATOMIC);
+	if (r)
+		dev_err(&ar2->intf[1]->dev,
+			"%s(): usb_submit_urb() = %d\n", __FUNCTION__, r);
+}
+
+static int ati_remote2_input_init(struct ati_remote2 *ar2)
+{
+	struct input_dev *idev;
+	int i;
+
+	idev = input_allocate_device();
+	if (!idev)
+		return -ENOMEM;
+
+	ar2->idev = idev;
+	idev->private = ar2;
+
+	idev->evbit[0] = BIT(EV_KEY) | BIT(EV_REP) | BIT(EV_REL);
+	idev->keybit[LONG(BTN_MOUSE)] = BIT(BTN_LEFT) | BIT(BTN_RIGHT);
+	idev->relbit[0] = BIT(REL_X) | BIT(REL_Y);
+	for (i = 0; ati_remote2_key_table[i].key_code != KEY_RESERVED; i++)
+		set_bit(ati_remote2_key_table[i].key_code, idev->keybit);
+
+	idev->rep[REP_DELAY]  = 250;
+	idev->rep[REP_PERIOD] = 33;
+
+	idev->open = ati_remote2_open;
+	idev->close = ati_remote2_close;
+
+	idev->name = ar2->name;
+	idev->phys = ar2->phys;
+
+	usb_to_input_id(ar2->udev, &idev->id);
+	idev->cdev.dev = &ar2->udev->dev;
+
+	i = input_register_device(idev);
+	if (i)
+		input_free_device(idev);
+
+	return i;
+}
+
+static int ati_remote2_urb_init(struct ati_remote2 *ar2)
+{
+	struct usb_device *udev = ar2->udev;
+	int i, pipe, maxp;
+
+	for (i = 0; i < 2; i++) {
+		ar2->buf[i] = usb_buffer_alloc(udev, 4, GFP_KERNEL, &ar2->buf_dma[i]);
+		if (!ar2->buf[i])
+			return -ENOMEM;
+
+		ar2->urb[i] = usb_alloc_urb(0, GFP_KERNEL);
+		if (!ar2->urb[i])
+			return -ENOMEM;
+
+		pipe = usb_rcvintpipe(udev, ar2->ep[i]->bEndpointAddress);
+		maxp = usb_maxpacket(udev, pipe, usb_pipeout(pipe));
+		maxp = maxp > 4 ? 4 : maxp;
+
+		usb_fill_int_urb(ar2->urb[i], udev, pipe, ar2->buf[i], maxp,
+				 i ? ati_remote2_complete_key : ati_remote2_complete_mouse,
+				 ar2, ar2->ep[i]->bInterval);
+		ar2->urb[i]->transfer_dma = ar2->buf_dma[i];
+		ar2->urb[i]->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
+	}
+
+	return 0;
+}
+
+static void ati_remote2_urb_cleanup(struct ati_remote2 *ar2)
+{
+	int i;
+
+	for (i = 0; i < 2; i++) {
+		if (ar2->urb[i])
+			usb_free_urb(ar2->urb[i]);
+
+		if (ar2->buf[i])
+			usb_buffer_free(ar2->udev, 4, ar2->buf[i], ar2->buf_dma[i]);
+	}
+}
+
+static int ati_remote2_probe(struct usb_interface *interface, const struct usb_device_id *id)
+{
+	struct usb_device *udev = interface_to_usbdev(interface);
+	struct usb_host_interface *alt = interface->cur_altsetting;
+	struct ati_remote2 *ar2;
+	int r;
+
+	if (alt->desc.bInterfaceNumber)
+		return -ENODEV;
+
+	ar2 = kzalloc(sizeof (struct ati_remote2), GFP_KERNEL);
+	if (!ar2)
+		return -ENOMEM;
+
+	ar2->udev = udev;
+
+	ar2->intf[0] = interface;
+	ar2->ep[0] = &alt->endpoint[0].desc;
+
+	ar2->intf[1] = usb_ifnum_to_if(udev, 1);
+	r = usb_driver_claim_interface(&ati_remote2_driver, ar2->intf[1], ar2);
+	if (r)
+		goto fail1;
+	alt = ar2->intf[1]->cur_altsetting;
+	ar2->ep[1] = &alt->endpoint[0].desc;
+
+	r = ati_remote2_urb_init(ar2);
+	if (r)
+		goto fail2;
+
+	usb_make_path(udev, ar2->phys, sizeof(ar2->phys));
+	strlcat(ar2->phys, "/input0", sizeof(ar2->phys));
+
+	strlcat(ar2->name, "ATI Remote Wonder II", sizeof(ar2->name));
+
+	r = ati_remote2_input_init(ar2);
+	if (r)
+		goto fail2;
+
+	usb_set_intfdata(interface, ar2);
+
+	return 0;
+
+ fail2:
+	ati_remote2_urb_cleanup(ar2);
+
+	usb_driver_release_interface(&ati_remote2_driver, ar2->intf[1]);
+ fail1:
+	kfree(ar2);
+
+	return r;
+}
+
+static void ati_remote2_disconnect(struct usb_interface *interface)
+{
+	struct ati_remote2 *ar2;
+	struct usb_host_interface *alt = interface->cur_altsetting;
+
+	if (alt->desc.bInterfaceNumber)
+		return;
+
+	ar2 = usb_get_intfdata(interface);
+	usb_set_intfdata(interface, NULL);
+
+	input_unregister_device(ar2->idev);
+
+	ati_remote2_urb_cleanup(ar2);
+
+	usb_driver_release_interface(&ati_remote2_driver, ar2->intf[1]);
+
+	kfree(ar2);
+}
+
+static int __init ati_remote2_init(void)
+{
+	int r;
+
+	r = usb_register(&ati_remote2_driver);
+	if (r)
+		printk(KERN_ERR "ati_remote2: usb_register() = %d\n", r);
+	else
+		printk(KERN_INFO "ati_remote2: " DRIVER_DESC " " DRIVER_VERSION "\n");
+
+	return r;
+}
+
+static void __exit ati_remote2_exit(void)
+{
+	usb_deregister(&ati_remote2_driver);
+}
+
+module_init(ati_remote2_init);
+module_exit(ati_remote2_exit);