[PARISC] Update parisc specific input code from parisc tree

Update drivers to new input layer changes.

Signed-off-by: Helge Deller <[e-mail]>
Signed-off-by: Matthew Wilcox <[e-mail]>

Reorder code in gscps2_interrupt() and only enable ports when opened.
This fixes issues with hangs booting an SMP kernel on my C360.
Previously serio_interrupt() could be called before the lock in
struct serio was initialised.

Signed-off-by: Richard Hirst <[e-mail]>

Signed-off-by: Kyle McMartin <[e-mail]>

drivers/input/keyboard/hil_kbd.c

···
 	hil_packet packet;
 	int idx;
 
-	kbd = (struct hil_kbd *)serio->private;
+	kbd = serio_get_drvdata(serio);
 	if (kbd == NULL) {
 		BUG();
 		return IRQ_HANDLED;
···
 {
 	struct hil_kbd *kbd;
 
-	kbd = (struct hil_kbd *)serio->private;
+	kbd = serio_get_drvdata(serio);
 	if (kbd == NULL) {
 		BUG();
 		return;
···
 	kfree(kbd);
 }
 
-static void hil_kbd_connect(struct serio *serio, struct serio_driver *drv)
+static int hil_kbd_connect(struct serio *serio, struct serio_driver *drv)
 {
 	struct hil_kbd	*kbd;
 	uint8_t		did, *idd;
 	int		i;
 	
-	if (serio->type != (SERIO_HIL_MLC | SERIO_HIL)) return;
-
-	if (!(kbd = kmalloc(sizeof(struct hil_kbd), GFP_KERNEL))) return;
+	kbd = kmalloc(sizeof(*kbd), GFP_KERNEL);
+	if (!kbd)
+		return -ENOMEM;
 	memset(kbd, 0, sizeof(struct hil_kbd));
 
 	if (serio_open(serio, drv)) goto bail0;
 
-	serio->private = kbd;
+	serio_set_drvdata(serio, kbd);
 	kbd->serio = serio;
 	kbd->dev.private = kbd;
 
···
 	down(&(kbd->sem));
 	up(&(kbd->sem));
 
-	return;
+	return 0;
  bail1:
 	serio_close(serio);
  bail0:
 	kfree(kbd);
+	serio_set_drvdata(serio, NULL);
+	return -EIO;
 }
 
+static struct serio_device_id hil_kbd_ids[] = {
+	{
+		.type = SERIO_HIL_MLC,
+		.proto = SERIO_HIL,
+		.id = SERIO_ANY,
+		.extra = SERIO_ANY,
+	},
+	{ 0 }
+};
 
 struct serio_driver hil_kbd_serio_drv = {
 	.driver		= {
 		.name	= "hil_kbd",
 	},
 	.description	= "HP HIL keyboard driver",
+	.id_table	= hil_kbd_ids,
 	.connect 	= hil_kbd_connect,
 	.disconnect 	= hil_kbd_disconnect,
 	.interrupt 	= hil_kbd_interrupt

drivers/input/keyboard/hilkbd.c

···
 #include <linux/errno.h>
 #include <linux/input.h>
 #include <linux/init.h>
-#include <linux/irq.h>
+#include <linux/interrupt.h>
 #include <linux/hil.h>
 #include <linux/spinlock.h>
 

drivers/input/mouse/hil_ptr.c

···
 	hil_packet packet;
 	int idx;
 
-	ptr = (struct hil_ptr *)serio->private;
+	ptr = serio_get_drvdata(serio);
 	if (ptr == NULL) {
 		BUG();
 		return IRQ_HANDLED;
···
 {
 	struct hil_ptr *ptr;
 
-	ptr = (struct hil_ptr *)serio->private;
+	ptr = serio_get_drvdata(serio);
 	if (ptr == NULL) {
 		BUG();
 		return;
···
 	kfree(ptr);
 }
 
-static void hil_ptr_connect(struct serio *serio, struct serio_driver *driver)
+static int hil_ptr_connect(struct serio *serio, struct serio_driver *driver)
 {
 	struct hil_ptr	*ptr;
 	char		*txt;
 	unsigned int	i, naxsets, btntype;
 	uint8_t		did, *idd;
 
-	if (serio->type != (SERIO_HIL_MLC | SERIO_HIL)) return;
-
-	if (!(ptr = kmalloc(sizeof(struct hil_ptr), GFP_KERNEL))) return;
+	if (!(ptr = kmalloc(sizeof(struct hil_ptr), GFP_KERNEL))) return -ENOMEM;
 	memset(ptr, 0, sizeof(struct hil_ptr));
 
 	if (serio_open(serio, driver)) goto bail0;
 
-	serio->private = ptr;
+	serio_set_drvdata(serio, ptr);
 	ptr->serio = serio;
 	ptr->dev.private = ptr;
 
···
 		(btntype == BTN_MOUSE) ? "HIL mouse":"HIL tablet or touchpad",
 		did);
 
-	return;
+	return 0;
  bail1:
 	serio_close(serio);
  bail0:
 	kfree(ptr);
-	return;
+	serio_set_drvdata(serio, NULL);
+	return -ENODEV;
 }
 
+static struct serio_device_id hil_ptr_ids[] = {
+	{
+		.type = SERIO_HIL_MLC,
+		.proto = SERIO_HIL,
+		.id = SERIO_ANY,
+		.extra = SERIO_ANY,
+	},
+	{ 0 }
+};
 
 static struct serio_driver hil_ptr_serio_driver = {
 	.driver		= {
 		.name	= "hil_ptr",
 	},
 	.description	= "HP HIL mouse/tablet driver",
-	.connect =	hil_ptr_connect,
-	.disconnect =	hil_ptr_disconnect,
-	.interrupt =	hil_ptr_interrupt
+	.id_table	= hil_ptr_ids,
+	.connect	= hil_ptr_connect,
+	.disconnect	= hil_ptr_disconnect,
+	.interrupt	= hil_ptr_interrupt
 };
 
 static int __init hil_ptr_init(void)

drivers/input/serio/gscps2.c

···
 	writeb(0xff, addr+GSC_RESET);
 	gscps2_flush(ps2port);
 	spin_unlock_irqrestore(&ps2port->lock, flags);
-
-	/* enable it */
-	gscps2_enable(ps2port, ENABLE);
 }
 
 static LIST_HEAD(ps2port_list);
···
 
 	gscps2_reset(ps2port);
 
+	/* enable it */
+	gscps2_enable(ps2port, ENABLE);
+
 	gscps2_interrupt(0, NULL, NULL);
 
 	return 0;
···
 	serio->port_data	= ps2port;
 	serio->dev.parent	= &dev->dev;
 
-	list_add_tail(&ps2port->node, &ps2port_list);
-
 	ret = -EBUSY;
 	if (request_irq(dev->irq, gscps2_interrupt, SA_SHIRQ, ps2port->port->name, ps2port))
 		goto fail_miserably;
···
 
 	serio_register_port(ps2port->port);
 
+	list_add_tail(&ps2port->node, &ps2port_list);
+
 	return 0;
 
 fail:
 	free_irq(dev->irq, ps2port);
 
 fail_miserably:
-	list_del(&ps2port->node);
 	iounmap(ps2port->addr);
-	release_mem_region(dev->hpa, GSC_STATUS + 4);
+	release_mem_region(dev->hpa.start, GSC_STATUS + 4);
 
 fail_nomem:
 	kfree(ps2port);

drivers/input/serio/hil_mlc.c

···
 	struct hil_mlc_serio_map *map;
 	struct hil_mlc *mlc;
 
-	if (serio->private != NULL) return -EBUSY;
+	if (serio_get_drvdata(serio) != NULL)
+		return -EBUSY;
 
 	map = serio->port_data;
 	if (map == NULL) {
···
 		return;
 	}
 
-	serio->private = NULL;
+	serio_set_drvdata(serio, NULL);
 	serio->drv = NULL;
 	/* TODO wake up interruptable */
 }
+
+static struct serio_device_id hil_mlc_serio_id = {
+	.type = SERIO_HIL_MLC,
+	.proto = SERIO_HIL,
+	.extra = SERIO_ANY,
+	.id = SERIO_ANY,
+};
 
 int hil_mlc_register(hil_mlc *mlc) {
 	int i;
···
 		mlc_serio = kmalloc(sizeof(*mlc_serio), GFP_KERNEL);
 		mlc->serio[i] = mlc_serio;
 		memset(mlc_serio, 0, sizeof(*mlc_serio));
-		mlc_serio->type			= SERIO_HIL | SERIO_HIL_MLC;
+		mlc_serio->id			= hil_mlc_serio_id;
 		mlc_serio->write		= hil_mlc_serio_write;
 		mlc_serio->open			= hil_mlc_serio_open;
 		mlc_serio->close		= hil_mlc_serio_close;

include/linux/hil.h

···
+#ifndef _HIL_H_
+#define _HIL_H_
+
+/*
+ * Hewlett Packard Human Interface Loop (HP-HIL) Protocol -- header.
+ *
+ * Copyright (c) 2001 Brian S. Julin
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions, and the following disclaimer,
+ *    without modification.
+ * 2. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * Alternatively, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL").
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
+ * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ *
+ * References:
+ * HP-HIL Technical Reference Manual.  Hewlett Packard Product No. 45918A
+ *
+ * A note of thanks to HP for providing and shipping reference materials
+ * free of charge to help in the development of HIL support for Linux.
+ *
+ */
+
+#include <asm/types.h>
+
+/* Physical constants relevant to raw loop/device timing. 
+ */ 
+
+#define HIL_CLOCK		8MHZ
+#define HIL_EK1_CLOCK		30HZ
+#define HIL_EK2_CLOCK		60HZ
+
+#define HIL_TIMEOUT_DEV         5	/* ms */
+#define HIL_TIMEOUT_DEVS	10	/* ms */
+#define HIL_TIMEOUT_NORESP	10	/* ms */
+#define HIL_TIMEOUT_DEVS_DATA	16	/* ms */
+#define HIL_TIMEOUT_SELFTEST	200	/* ms */
+
+
+/* Actual wire line coding.  These will only be useful if someone is 
+ * implementing a software MLC to run HIL devices on a non-parisc machine.
+ */
+
+#define HIL_WIRE_PACKET_LEN	15
+enum hil_wire_bitpos {
+	HIL_WIRE_START		= 0,
+	HIL_WIRE_ADDR2,
+	HIL_WIRE_ADDR1,
+	HIL_WIRE_ADDR0,
+	HIL_WIRE_COMMAND,
+	HIL_WIRE_DATA7,
+	HIL_WIRE_DATA6,
+	HIL_WIRE_DATA5,
+	HIL_WIRE_DATA4,
+	HIL_WIRE_DATA3,
+	HIL_WIRE_DATA2,
+	HIL_WIRE_DATA1,
+	HIL_WIRE_DATA0,
+	HIL_WIRE_PARITY,
+	HIL_WIRE_STOP
+};
+
+/* HP documentation uses these bit positions to refer to commands;
+ * we will call these "packets".
+ */
+enum hil_pkt_bitpos {
+	HIL_PKT_CMD		= 0x00000800,
+	HIL_PKT_ADDR2		= 0x00000400,
+	HIL_PKT_ADDR1		= 0x00000200,
+	HIL_PKT_ADDR0		= 0x00000100,
+	HIL_PKT_ADDR_MASK	= 0x00000700,
+	HIL_PKT_ADDR_SHIFT	= 8,
+	HIL_PKT_DATA7		= 0x00000080,
+	HIL_PKT_DATA6		= 0x00000040,
+	HIL_PKT_DATA5		= 0x00000020,
+	HIL_PKT_DATA4		= 0x00000010,
+	HIL_PKT_DATA3		= 0x00000008,
+	HIL_PKT_DATA2		= 0x00000004,
+	HIL_PKT_DATA1		= 0x00000002,
+	HIL_PKT_DATA0		= 0x00000001,
+	HIL_PKT_DATA_MASK	= 0x000000FF,
+	HIL_PKT_DATA_SHIFT	= 0
+};
+
+/* The HIL MLC also has several error/status/control bits.  We extend the 
+ * "packet" to include these when direct access to the MLC is available,
+ * or emulate them in cases where they are not available. 
+ *
+ * This way the device driver knows that the underlying MLC driver
+ * has had to deal with loop errors.
+ */
+enum hil_error_bitpos {
+	HIL_ERR_OB	= 0x00000800, /* MLC is busy sending an auto-poll, 
+					 or we have filled up the output 
+					 buffer and must wait. */
+	HIL_ERR_INT	= 0x00010000, /* A normal interrupt has occurred. */
+	HIL_ERR_NMI	= 0x00020000, /* An NMI has occurred. */
+	HIL_ERR_LERR	= 0x00040000, /* A poll didn't come back. */
+	HIL_ERR_PERR	= 0x01000000, /* There was a Parity Error. */
+	HIL_ERR_FERR	= 0x02000000, /* There was a Framing Error. */
+	HIL_ERR_FOF	= 0x04000000  /* Input FIFO Overflowed. */
+};
+
+enum hil_control_bitpos {
+	HIL_CTRL_TEST	= 0x00010000,
+	HIL_CTRL_IPF	= 0x00040000,
+	HIL_CTRL_APE	= 0x02000000
+};
+
+/* Bits 30,31 are unused, we use them to control write behavior. */
+#define HIL_DO_ALTER_CTRL  0x40000000 /* Write MSW of packet to control 
+                                          before writing LSW to loop */
+#define HIL_CTRL_ONLY      0xc0000000 /* *Only* alter the control registers */
+
+/* This gives us a 32-bit "packet" 
+ */
+typedef u32 hil_packet;
+
+
+/* HIL Loop commands 
+ */
+enum hil_command {
+	HIL_CMD_IFC	= 0x00,	/* Interface Clear */
+	HIL_CMD_EPT	= 0x01,	/* Enter Pass-Thru Mode */
+	HIL_CMD_ELB	= 0x02,	/* Enter Loop-Back Mode */
+	HIL_CMD_IDD	= 0x03,	/* Identify and Describe */
+	HIL_CMD_DSR	= 0x04,	/* Device Soft Reset */
+	HIL_CMD_PST	= 0x05,	/* Perform Self Test */
+	HIL_CMD_RRG	= 0x06,	/* Read Register */
+	HIL_CMD_WRG	= 0x07,	/* Write Register */
+	HIL_CMD_ACF	= 0x08,	/* Auto Configure */
+	HIL_CMDID_ACF	= 0x07,	/* Auto Configure bits with incremented ID */
+	HIL_CMD_POL	= 0x10,	/* Poll */
+	HIL_CMDCT_POL	= 0x0f,	/* Poll command bits with item count  */
+	HIL_CMD_RPL	= 0x20,	/* RePoll */
+	HIL_CMDCT_RPL	= 0x0f,	/* RePoll command bits with item count */
+	HIL_CMD_RNM	= 0x30,	/* Report Name */
+	HIL_CMD_RST	= 0x31,	/* Report Status */
+	HIL_CMD_EXD	= 0x32,	/* Extended Describe */
+	HIL_CMD_RSC	= 0x33,	/* Report Security Code */
+
+	/* 0x34 to 0x3c reserved for future use  */
+
+	HIL_CMD_DKA	= 0x3d,	/* Disable Keyswitch Autorepeat */
+	HIL_CMD_EK1	= 0x3e,	/* Enable Keyswitch Autorepeat 1 */
+	HIL_CMD_EK2	= 0x3f,	/* Enable Keyswitch Autorepeat 2 */
+	HIL_CMD_PR1	= 0x40,	/* Prompt1 */  
+	HIL_CMD_PR2	= 0x41,	/* Prompt2 */
+	HIL_CMD_PR3	= 0x42,	/* Prompt3 */
+	HIL_CMD_PR4	= 0x43,	/* Prompt4 */
+	HIL_CMD_PR5	= 0x44,	/* Prompt5 */
+	HIL_CMD_PR6	= 0x45,	/* Prompt6 */
+	HIL_CMD_PR7	= 0x46,	/* Prompt7 */
+	HIL_CMD_PRM	= 0x47,	/* Prompt (General Purpose) */
+	HIL_CMD_AK1	= 0x48,	/* Acknowlege1 */  
+	HIL_CMD_AK2	= 0x49,	/* Acknowlege2 */
+	HIL_CMD_AK3	= 0x4a,	/* Acknowlege3 */
+	HIL_CMD_AK4	= 0x4b,	/* Acknowlege4 */
+	HIL_CMD_AK5	= 0x4c,	/* Acknowlege5 */
+	HIL_CMD_AK6	= 0x4d,	/* Acknowlege6 */
+	HIL_CMD_AK7	= 0x4e,	/* Acknowlege7 */
+	HIL_CMD_ACK	= 0x4f,	/* Acknowlege (General Purpose) */
+
+	/* 0x50 to 0x78 reserved for future use  */
+	/* 0x80 to 0xEF device-specific commands */
+	/* 0xf0 to 0xf9 reserved for future use  */
+
+	HIL_CMD_RIO	= 0xfa,	/* Register I/O Error */
+	HIL_CMD_SHR	= 0xfb,	/* System Hard Reset */
+	HIL_CMD_TER	= 0xfc,	/* Transmission Error */
+	HIL_CMD_CAE	= 0xfd,	/* Configuration Address Error */
+	HIL_CMD_DHR	= 0xfe,	/* Device Hard Reset */
+
+	/* 0xff is prohibited from use. */
+};
+
+
+/* 
+ * Response "records" to HIL commands
+ */
+
+/* Device ID byte 
+ */
+#define HIL_IDD_DID_TYPE_MASK		0xe0	/* Primary type bits */
+#define HIL_IDD_DID_TYPE_KB_INTEGRAL	0xa0	/* Integral keyboard */
+#define HIL_IDD_DID_TYPE_KB_ITF		0xc0	/* ITD keyboard */
+#define HIL_IDD_DID_TYPE_KB_RSVD	0xe0	/* Reserved keyboard type */
+#define HIL_IDD_DID_TYPE_KB_LANG_MASK	0x1f	/* Keyboard locale bits */
+#define HIL_IDD_DID_KBLANG_USE_ESD	0x00	/* Use ESD Locale instead */
+#define HIL_IDD_DID_TYPE_ABS		0x80    /* Absolute Positioners */
+#define HIL_IDD_DID_ABS_RSVD1_MASK	0xf8	/* Reserved */
+#define HIL_IDD_DID_ABS_RSVD1		0x98
+#define HIL_IDD_DID_ABS_TABLET_MASK	0xf8	/* Tablets and digitizers */
+#define HIL_IDD_DID_ABS_TABLET		0x90
+#define HIL_IDD_DID_ABS_TSCREEN_MASK	0xfc	/* Touch screens */
+#define HIL_IDD_DID_ABS_TSCREEN		0x8c
+#define HIL_IDD_DID_ABS_RSVD2_MASK	0xfc	/* Reserved */
+#define HIL_IDD_DID_ABS_RSVD2		0x88
+#define HIL_IDD_DID_ABS_RSVD3_MASK	0xfc	/* Reserved */
+#define HIL_IDD_DID_ABS_RSVD3		0x80
+#define HIL_IDD_DID_TYPE_REL		0x60    /* Relative Positioners */
+#define HIL_IDD_DID_REL_RSVD1_MASK	0xf0	/* Reserved */
+#define HIL_IDD_DID_REL_RSVD1		0x70
+#define HIL_IDD_DID_REL_RSVD2_MASK	0xfc	/* Reserved */
+#define HIL_IDD_DID_REL_RSVD2		0x6c
+#define HIL_IDD_DID_REL_MOUSE_MASK	0xfc	/* Mouse */
+#define HIL_IDD_DID_REL_MOUSE		0x68
+#define HIL_IDD_DID_REL_QUAD_MASK	0xf8	/* Other Quadrature Devices */
+#define HIL_IDD_DID_REL_QUAD		0x60
+#define HIL_IDD_DID_TYPE_CHAR		0x40    /* Character Entry */
+#define HIL_IDD_DID_CHAR_BARCODE_MASK	0xfc	/* Barcode Reader */
+#define HIL_IDD_DID_CHAR_BARCODE	0x5c
+#define HIL_IDD_DID_CHAR_RSVD1_MASK	0xfc	/* Reserved */
+#define HIL_IDD_DID_CHAR_RSVD1		0x58
+#define HIL_IDD_DID_CHAR_RSVD2_MASK	0xf8	/* Reserved */
+#define HIL_IDD_DID_CHAR_RSVD2		0x50
+#define HIL_IDD_DID_CHAR_RSVD3_MASK	0xf0	/* Reserved */
+#define HIL_IDD_DID_CHAR_RSVD3		0x40
+#define HIL_IDD_DID_TYPE_OTHER		0x20    /* Miscellaneous */
+#define HIL_IDD_DID_OTHER_RSVD1_MASK	0xf0	/* Reserved */
+#define HIL_IDD_DID_OTHER_RSVD1		0x30
+#define HIL_IDD_DID_OTHER_BARCODE_MASK	0xfc	/* Tone Generator */
+#define HIL_IDD_DID_OTHER_BARCODE	0x2c
+#define HIL_IDD_DID_OTHER_RSVD2_MASK	0xfc	/* Reserved */
+#define HIL_IDD_DID_OTHER_RSVD2		0x28
+#define HIL_IDD_DID_OTHER_RSVD3_MASK	0xf8	/* Reserved */
+#define HIL_IDD_DID_OTHER_RSVD3		0x20
+#define HIL_IDD_DID_TYPE_KEYPAD		0x00	/* Vectra Keyboard */
+
+/* IDD record header 
+ */
+#define HIL_IDD_HEADER_AXSET_MASK	0x03    /* Number of axis in a set */
+#define HIL_IDD_HEADER_RSC		0x04	/* Supports RSC command */
+#define HIL_IDD_HEADER_EXD		0x08	/* Supports EXD command */
+#define HIL_IDD_HEADER_IOD		0x10	/* IOD byte to follow */
+#define HIL_IDD_HEADER_16BIT		0x20	/* 16 (vs. 8) bit resolution */
+#define HIL_IDD_HEADER_ABS		0x40	/* Reports Absolute Position */
+#define HIL_IDD_HEADER_2X_AXIS		0x80	/* Two sets of 1-3 axis */
+
+/* I/O Descriptor
+ */
+#define HIL_IDD_IOD_NBUTTON_MASK	0x07	/* Number of buttons */
+#define HIL_IDD_IOD_PROXIMITY		0x08	/* Proximity in/out events */
+#define HIL_IDD_IOD_PROMPT_MASK		0x70	/* Number of prompts/acks */
+#define HIL_IDD_IOD_PROMPT_SHIFT	4
+#define HIL_IDD_IOD_PROMPT		0x80	/* Generic prompt/ack */
+
+#define HIL_IDD_NUM_AXES_PER_SET(header_packet) \
+((header_packet) & HIL_IDD_HEADER_AXSET_MASK)
+
+#define HIL_IDD_NUM_AXSETS(header_packet) \
+(2 - !((header_packet) & HIL_IDD_HEADER_2X_AXIS))
+
+#define HIL_IDD_LEN(header_packet) \
+((4 - !(header_packet & HIL_IDD_HEADER_IOD) -			\
+  2 * !(HIL_IDD_NUM_AXES_PER_SET(header_packet))) +		\
+  2 * HIL_IDD_NUM_AXES_PER_SET(header_packet) *			\
+ !!((header_packet) & HIL_IDD_HEADER_ABS))
+
+/* The following HIL_IDD_* macros assume you have an array of 
+ * packets and/or unpacked 8-bit data in the order that they 
+ * were received.
+ */
+
+#define HIL_IDD_AXIS_COUNTS_PER_M(header_ptr) \
+(!(HIL_IDD_NUM_AXSETS(*(header_ptr))) ? -1 :			\
+(((*(header_ptr + 1) & HIL_PKT_DATA_MASK) +			\
+  ((*(header_ptr + 2) & HIL_PKT_DATA_MASK)) << 8)		\
+* ((*(header_ptr) & HIL_IDD_HEADER_16BIT) ? 100 : 1)))
+
+#define HIL_IDD_AXIS_MAX(header_ptr, __axnum) \
+((!(*(header_ptr) & HIL_IDD_HEADER_ABS) ||			\
+  (HIL_IDD_NUM_AXES_PER_SET(*(header_ptr)) <= __axnum)) ? 0 :	\
+ ((HIL_PKT_DATA_MASK & *((header_ptr) + 3 + 2 * __axnum)) +	\
+  ((HIL_PKT_DATA_MASK & *((header_ptr) + 4 + 2 * __axnum)) << 8)))
+
+#define HIL_IDD_IOD(header_ptr) \
+(*(header_ptr + HIL_IDD_LEN((*header_ptr)) - 1))
+
+#define HIL_IDD_HAS_GEN_PROMPT(header_ptr) \
+((*header_ptr & HIL_IDD_HEADER_IOD) &&				\
+ (HIL_IDD_IOD(header_ptr) & HIL_IDD_IOD_PROMPT))
+
+#define HIL_IDD_HAS_GEN_PROXIMITY(header_ptr) \
+((*header_ptr & HIL_IDD_HEADER_IOD) &&				\
+ (HIL_IDD_IOD(header_ptr) & HIL_IDD_IOD_PROXIMITY))
+
+#define HIL_IDD_NUM_BUTTONS(header_ptr) \
+((*header_ptr & HIL_IDD_HEADER_IOD) ?				\
+ (HIL_IDD_IOD(header_ptr) & HIL_IDD_IOD_NBUTTON_MASK) : 0)
+
+#define HIL_IDD_NUM_PROMPTS(header_ptr) \
+((*header_ptr & HIL_IDD_HEADER_IOD) ?				\
+ ((HIL_IDD_IOD(header_ptr) & HIL_IDD_IOD_NPROMPT_MASK)		\
+  >> HIL_IDD_IOD_PROMPT_SHIFT) : 0)
+
+/* The response to HIL EXD commands -- the "extended describe record" */
+#define	HIL_EXD_HEADER_WRG		0x03	/* Supports type2 WRG */
+#define HIL_EXD_HEADER_WRG_TYPE1	0x01	/* Supports type1 WRG */
+#define	HIL_EXD_HEADER_WRG_TYPE2	0x02	/* Supports type2 WRG */
+#define	HIL_EXD_HEADER_RRG		0x04	/* Supports RRG command */
+#define	HIL_EXD_HEADER_RNM		0x10	/* Supports RNM command */
+#define HIL_EXD_HEADER_RST		0x20	/* Supports RST command */
+#define HIL_EXD_HEADER_LOCALE		0x40	/* Contains locale code */
+
+#define HIL_EXD_NUM_RRG(header_ptr) \
+((*header_ptr & HIL_EXD_HEADER_RRG) ? \
+ (*(header_ptr + 1) & HIL_PKT_DATA_MASK) : 0)
+
+#define HIL_EXD_NUM_WWG(header_ptr) \
+((*header_ptr & HIL_EXD_HEADER_WRG) ?				\
+ (*(header_ptr + 2 - !(*header_ptr & HIL_EXD_HEADER_RRG)) &	\
+    HIL_PKT_DATA_MASK) : 0)
+
+#define HIL_EXD_LEN(header_ptr) \
+(!!(*header_ptr & HIL_EXD_HEADER_RRG) +				\
+ !!(*header_ptr & HIL_EXD_HEADER_WRG) +				\
+ !!(*header_ptr & HIL_EXD_HEADER_LOCALE) +			\
+ 2 * !!(*header_ptr & HIL_EXD_HEADER_WRG_TYPE2) + 1)
+
+#define HIL_EXD_LOCALE(header_ptr) \
+(!(*header_ptr & HIL_EXD_HEADER_LOCALE) ? -1 :			\
+ (*(header_ptr + HIL_EXD_LEN(header_ptr) - 1) & HIL_PKT_DATA_MASK))
+
+#define HIL_EXD_WRG_TYPE2_LEN(header_ptr) \
+(!(*header_ptr & HIL_EXD_HEADER_WRG_TYPE2) ? -1	:			\
+ (*(header_ptr + HIL_EXD_LEN(header_ptr) - 2 -                  	\
+    !!(*header_ptr & HIL_EXD_HEADER_LOCALE)) & HIL_PKT_DATA_MASK) +	\
+ ((*(header_ptr + HIL_EXD_LEN(header_ptr) - 1 -				\
+     !!(*header_ptr & HIL_EXD_HEADER_LOCALE)) & HIL_PKT_DATA_MASK) << 8))
+
+/* Device locale codes. */ 
+
+/* Last defined locale code.  Everything above this is "Reserved",
+   and note that this same table applies to the Device ID Byte where 
+   keyboards may have a nationality code which is only 5 bits. */
+#define HIL_LOCALE_MAX 0x1f
+
+/* Map to hopefully useful strings.  I was trying to make these look
+   like locale.aliases strings do; maybe that isn't the right table to
+   emulate.  In either case, I didn't have much to work on. */
+#define HIL_LOCALE_MAP \
+"",			/* 0x00 Reserved */		\
+"",			/* 0x01 Reserved */		\
+"",			/* 0x02 Reserved */		\
+"swiss.french",		/* 0x03 Swiss/French */		\
+"portuguese",		/* 0x04 Portuguese */		\
+"arabic",		/* 0x05 Arabic */		\
+"hebrew",		/* 0x06 Hebrew */		\
+"english.canadian",	/* 0x07 Canadian English */	\
+"turkish",		/* 0x08 Turkish */		\
+"greek",		/* 0x09 Greek */		\
+"thai",			/* 0x0a Thai (Thailand) */	\
+"italian",		/* 0x0b Italian */		\
+"korean",		/* 0x0c Hangul (Korea) */	\
+"dutch",		/* 0x0d Dutch */		\
+"swedish",		/* 0x0e Swedish */		\
+"german",		/* 0x0f German */		\
+"chinese",		/* 0x10 Chinese-PRC */		\
+"chinese",		/* 0x11 Chinese-ROC */		\
+"swiss.french",		/* 0x12 Swiss/French II */	\
+"spanish",		/* 0x13 Spanish */		\
+"swiss.german",		/* 0x14 Swiss/German II */	\
+"flemish",		/* 0x15 Belgian (Flemish) */	\
+"finnish",		/* 0x16 Finnish	*/		\
+"english.uk",		/* 0x17 United Kingdom */	\
+"french.canadian",	/* 0x18 French/Canadian */	\
+"swiss.german",		/* 0x19 Swiss/German */		\
+"norwegian",		/* 0x1a Norwegian */		\
+"french",		/* 0x1b French */		\
+"danish",		/* 0x1c Danish */		\
+"japanese",		/* 0x1d Katakana */		\
+"spanish",		/* 0x1e Latin American/Spanish*/\
+"english.us"		/* 0x1f United States */	\
+
+
+/* HIL keycodes */
+#define HIL_KEYCODES_SET1_TBLSIZE 128
+#define HIL_KEYCODES_SET1 	\
+   KEY_5,		KEY_RESERVED,	KEY_RIGHTALT,	KEY_LEFTALT,	\
+   KEY_RIGHTSHIFT,	KEY_LEFTSHIFT,	KEY_LEFTCTRL,	KEY_SYSRQ,	\
+   KEY_KP4,		KEY_KP8,	KEY_KP5,	KEY_KP9,	\
+   KEY_KP6,		KEY_KP7,	KEY_KPCOMMA,	KEY_KPENTER,	\
+   KEY_KP1,		KEY_KPSLASH,	KEY_KP2,	KEY_KPPLUS,	\
+   KEY_KP3,		KEY_KPASTERISK,	KEY_KP0,	KEY_KPMINUS,	\
+   KEY_B,		KEY_V,		KEY_C,		KEY_X,		\
+   KEY_Z,		KEY_RESERVED,	KEY_RESERVED,   KEY_ESC,	\
+   KEY_6,		KEY_F10,	KEY_3,		KEY_F11,	\
+   KEY_KPDOT,		KEY_F9,		KEY_TAB /*KP*/,	KEY_F12,	\
+   KEY_H,		KEY_G,		KEY_F,		KEY_D,		\
+   KEY_S,		KEY_A,		KEY_RESERVED,	KEY_CAPSLOCK,	\
+   KEY_U,		KEY_Y,		KEY_T,		KEY_R,		\
+   KEY_E,		KEY_W,		KEY_Q,		KEY_TAB,	\
+   KEY_7,		KEY_6,		KEY_5,		KEY_4,		\
+   KEY_3,		KEY_2,		KEY_1,		KEY_GRAVE,	\
+   KEY_F13,		KEY_F14,	KEY_F15,	KEY_F16,	\
+   KEY_F17,		KEY_F18,	KEY_F19,	KEY_F20,	\
+   KEY_MENU,		KEY_F4,		KEY_F3,		KEY_F2,		\
+   KEY_F1,		KEY_VOLUMEUP,	KEY_STOP,	KEY_SENDFILE,	\
+   KEY_SYSRQ,		KEY_F5,		KEY_F6,		KEY_F7,		\
+   KEY_F8,		KEY_VOLUMEDOWN,	KEY_DEL_EOL,	KEY_DEL_EOS,	\
+   KEY_8,		KEY_9,		KEY_0,		KEY_MINUS,	\
+   KEY_EQUAL,		KEY_BACKSPACE,	KEY_INS_LINE,	KEY_DEL_LINE,	\
+   KEY_I,		KEY_O,		KEY_P,		KEY_LEFTBRACE,	\
+   KEY_RIGHTBRACE,	KEY_BACKSLASH,	KEY_INSERT,	KEY_DELETE,	\
+   KEY_J,		KEY_K,		KEY_L,		KEY_SEMICOLON,	\
+   KEY_APOSTROPHE,	KEY_ENTER,	KEY_HOME,	KEY_PAGEUP,	\
+   KEY_M,		KEY_COMMA,	KEY_DOT,	KEY_SLASH,	\
+   KEY_BACKSLASH,	KEY_SELECT,	KEY_102ND,	KEY_PAGEDOWN,	\
+   KEY_N,		KEY_SPACE,	KEY_NEXT,	KEY_RESERVED,	\
+   KEY_LEFT,		KEY_DOWN,	KEY_UP,		KEY_RIGHT
+
+
+#define HIL_KEYCODES_SET3_TBLSIZE 128
+#define HIL_KEYCODES_SET3 	\
+  KEY_RESERVED,	KEY_ESC,	KEY_1,		KEY_2,			\
+  KEY_3,	KEY_4,		KEY_5,		KEY_6,			\
+  KEY_7,	KEY_8,		KEY_9,		KEY_0,			\
+  KEY_MINUS,	KEY_EQUAL,	KEY_BACKSPACE,	KEY_TAB,		\
+  KEY_Q,	KEY_W,		KEY_E,		KEY_R,			\
+  KEY_T,	KEY_Y,		KEY_U,		KEY_I,			\
+  KEY_O,	KEY_P,		KEY_LEFTBRACE,	KEY_RIGHTBRACE,		\
+  KEY_ENTER,	KEY_LEFTCTRL,	KEY_A,		KEY_S,			\
+  KEY_D,	KEY_F,		KEY_G,		KEY_H,			\
+  KEY_J,	KEY_K,		KEY_L,		KEY_SEMICOLON,		\
+  KEY_APOSTROPHE,KEY_GRAVE,	KEY_LEFTSHIFT,	KEY_BACKSLASH,		\
+  KEY_Z,	KEY_X,		KEY_C,		KEY_V,			\
+  KEY_B,	KEY_N,		KEY_M,		KEY_COMMA,		\
+  KEY_DOT,	KEY_SLASH,	KEY_RIGHTSHIFT,	KEY_KPASTERISK,		\
+  KEY_LEFTALT,	KEY_SPACE,	KEY_CAPSLOCK,	KEY_F1,			\
+  KEY_F2,	KEY_F3,		KEY_F4,		KEY_F5,			\
+  KEY_F6,	KEY_F7,		KEY_F8,		KEY_F9,			\
+  KEY_F10,	KEY_NUMLOCK,	KEY_SCROLLLOCK,	KEY_KP7,		\
+  KEY_KP8,	KEY_KP9,	KEY_KPMINUS,	KEY_KP4,		\
+  KEY_KP5,	KEY_KP6,	KEY_KPPLUS,	KEY_KP1,		\
+  KEY_KP2,	KEY_KP3,	KEY_KP0,	KEY_KPDOT,		\
+  KEY_SYSRQ,	KEY_RESERVED,	KEY_RESERVED,	KEY_RESERVED,		\
+  KEY_RESERVED,	KEY_RESERVED,	KEY_RESERVED,	KEY_RESERVED,		\
+  KEY_RESERVED,	KEY_RESERVED,	KEY_RESERVED,	KEY_RESERVED,		\
+  KEY_UP,	KEY_LEFT,	KEY_DOWN,	KEY_RIGHT,		\
+  KEY_HOME,	KEY_PAGEUP,	KEY_END,	KEY_PAGEDOWN,		\
+  KEY_INSERT,	KEY_DELETE,	KEY_102ND,	KEY_RESERVED,		\
+  KEY_RESERVED,	KEY_RESERVED,	KEY_RESERVED,	KEY_RESERVED,		\
+  KEY_F1,	KEY_F2,		KEY_F3,		KEY_F4,			\
+  KEY_F5,	KEY_F6,		KEY_F7,		KEY_F8,			\
+  KEY_RESERVED,	KEY_RESERVED,	KEY_RESERVED,	KEY_RESERVED,		\
+  KEY_RESERVED,	KEY_RESERVED,	KEY_RESERVED,	KEY_RESERVED
+
+
+/* Response to POL command, the "poll record header" */
+
+#define HIL_POL_NUM_AXES_MASK	0x03	/* Number of axis reported */
+#define HIL_POL_CTS		0x04	/* Device ready to receive data */
+#define HIL_POL_STATUS_PENDING	0x08	/* Device has status to report */
+#define HIL_POL_CHARTYPE_MASK	0x70	/* Type of character data to follow */
+#define HIL_POL_CHARTYPE_NONE	0x00	/* No character data to follow */
+#define HIL_POL_CHARTYPE_RSVD1	0x10	/* Reserved Set 1 */
+#define HIL_POL_CHARTYPE_ASCII	0x20	/* U.S. ASCII */
+#define HIL_POL_CHARTYPE_BINARY	0x30	/* Binary data */
+#define HIL_POL_CHARTYPE_SET1	0x40	/* Keycode Set 1 */
+#define HIL_POL_CHARTYPE_RSVD2	0x50	/* Reserved Set 2 */
+#define HIL_POL_CHARTYPE_SET2	0x60	/* Keycode Set 2 */
+#define HIL_POL_CHARTYPE_SET3	0x70	/* Keycode Set 3 */
+#define HIL_POL_AXIS_ALT	0x80	/* Data is from axis set 2 */
+
+
+#endif /* _HIL_H_ */

include/linux/hil_mlc.h

···
+/*
+ * HP Human Interface Loop Master Link Controller driver.
+ *
+ * Copyright (c) 2001 Brian S. Julin
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions, and the following disclaimer,
+ *    without modification.
+ * 2. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * Alternatively, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL").
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
+ * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ *
+ * References:
+ * HP-HIL Technical Reference Manual.  Hewlett Packard Product No. 45918A
+ *
+ */
+
+#include <linux/hil.h>
+#include <linux/time.h>
+#include <linux/interrupt.h>
+#include <asm/semaphore.h>
+#include <linux/serio.h>
+#include <linux/list.h>
+
+typedef struct hil_mlc hil_mlc;
+
+/* The HIL has a complicated state engine.
+ * We define the structure of nodes in the state engine here.
+ */
+enum hilse_act {
+  	/* HILSE_OUT prepares to receive input if the next node
+	 * is an IN or EXPECT, and then sends the given packet.
+	 */
+	HILSE_OUT = 0,
+
+  	/* HILSE_CTS checks if the loop is busy. */
+	HILSE_CTS,
+
+	/* HILSE_OUT_LAST sends the given command packet to 
+	 * the last configured/running device on the loop.
+	 */
+	HILSE_OUT_LAST,
+
+	/* HILSE_OUT_DISC sends the given command packet to
+	 * the next device past the last configured/running one.
+	 */
+	HILSE_OUT_DISC,
+
+	/* HILSE_FUNC runs a callback function with given arguments.
+	 * a positive return value causes the "ugly" branch to be taken.
+	 */
+	HILSE_FUNC,
+
+  	/* HILSE_IN simply expects any non-errored packet to arrive 
+	 * within arg usecs.
+	 */
+	HILSE_IN		= 0x100,
+
+  	/* HILSE_EXPECT expects a particular packet to arrive 
+	 * within arg usecs, any other packet is considered an error.
+	 */
+	HILSE_EXPECT,
+
+  	/* HILSE_EXPECT_LAST as above but dev field should be last 
+	 * discovered/operational device.
+	 */
+	HILSE_EXPECT_LAST,
+
+  	/* HILSE_EXPECT_LAST as above but dev field should be first 
+	 * undiscovered/inoperational device.
+	 */
+	HILSE_EXPECT_DISC
+};
+
+typedef int	(hilse_func) (hil_mlc *mlc, int arg);
+struct hilse_node {
+	enum hilse_act		act;	/* How to process this node         */
+	union {
+		hilse_func	*func;	/* Function to call if HILSE_FUNC   */
+		hil_packet	packet;	/* Packet to send or to compare     */
+	} object;
+	int			arg;	/* Timeout in usec or parm for func */
+	int			good;	/* Node to jump to on success       */
+	int			bad;	/* Node to jump to on error         */
+	int			ugly;	/* Node to jump to on timeout       */
+};
+
+/* Methods for back-end drivers, e.g. hp_sdc_mlc */
+typedef int	(hil_mlc_cts) (hil_mlc *mlc);
+typedef void	(hil_mlc_out) (hil_mlc *mlc);
+typedef int	(hil_mlc_in)  (hil_mlc *mlc, suseconds_t timeout);
+
+struct hil_mlc_devinfo {
+	uint8_t	idd[16];	/* Device ID Byte and Describe Record */
+	uint8_t	rsc[16];	/* Security Code Header and Record */
+	uint8_t	exd[16];	/* Extended Describe Record */
+	uint8_t	rnm[16];	/* Device name as returned by RNM command */
+};
+
+struct hil_mlc_serio_map {
+	hil_mlc *mlc;
+	int di_revmap;
+	int didx;
+};
+
+/* How many (possibly old/detached) devices the we try to keep track of */
+#define HIL_MLC_DEVMEM 16
+
+struct hil_mlc {
+	struct list_head	list;	/* hil_mlc is organized as linked list */
+
+	rwlock_t		lock;
+
+	void *priv; /* Data specific to a particular type of MLC */
+
+	int 			seidx;	/* Current node in state engine */
+	int			istarted, ostarted;
+
+	hil_mlc_cts		*cts;
+	struct semaphore	csem;   /* Raised when loop idle */
+
+	hil_mlc_out		*out;
+	struct semaphore	osem;   /* Raised when outpacket dispatched */
+	hil_packet		opacket;
+
+	hil_mlc_in		*in;
+	struct semaphore	isem;   /* Raised when a packet arrives */
+	hil_packet		ipacket[16];
+	hil_packet		imatch;
+	int			icount;
+	struct timeval		instart;
+	suseconds_t		intimeout;
+
+	int			ddi;	/* Last operational device id */
+	int			lcv;	/* LCV to throttle loops */
+	struct timeval		lcv_tv; /* Time loop was started */
+
+	int			di_map[7]; /* Maps below items to live devs */
+	struct hil_mlc_devinfo	di[HIL_MLC_DEVMEM];
+	struct serio		*serio[HIL_MLC_DEVMEM];
+	struct hil_mlc_serio_map serio_map[HIL_MLC_DEVMEM];
+	hil_packet		serio_opacket[HIL_MLC_DEVMEM];
+	int			serio_oidx[HIL_MLC_DEVMEM];
+	struct hil_mlc_devinfo	di_scratch; /* Temporary area */
+
+	int			opercnt;
+
+	struct tasklet_struct	*tasklet;
+};
+
+int hil_mlc_register(hil_mlc *mlc);
+int hil_mlc_unregister(hil_mlc *mlc);

include/linux/hp_sdc.h

···
+/*
+ * HP i8042 System Device Controller -- header
+ *
+ * Copyright (c) 2001 Brian S. Julin
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions, and the following disclaimer,
+ *    without modification.
+ * 2. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * Alternatively, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL").
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
+ * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ *
+ * References:
+ * 
+ * HP-HIL Technical Reference Manual.  Hewlett Packard Product No. 45918A
+ *
+ * System Device Controller Microprocessor Firmware Theory of Operation
+ * 	for Part Number 1820-4784 Revision B.  Dwg No. A-1820-4784-2
+ *
+ */
+
+#ifndef _LINUX_HP_SDC_H
+#define _LINUX_HP_SDC_H
+
+#include <linux/interrupt.h>
+#include <linux/types.h>
+#include <linux/time.h>
+#include <linux/timer.h>
+#if defined(__hppa__)
+#include <asm/hardware.h>
+#endif
+
+
+/* No 4X status reads take longer than this (in usec).
+ */
+#define HP_SDC_MAX_REG_DELAY 20000
+
+typedef void (hp_sdc_irqhook) (int irq, void *dev_id, 
+			       uint8_t status, uint8_t data);
+
+int hp_sdc_request_timer_irq(hp_sdc_irqhook *callback);
+int hp_sdc_request_hil_irq(hp_sdc_irqhook *callback);
+int hp_sdc_request_cooked_irq(hp_sdc_irqhook *callback);
+int hp_sdc_release_timer_irq(hp_sdc_irqhook *callback);
+int hp_sdc_release_hil_irq(hp_sdc_irqhook *callback);
+int hp_sdc_release_cooked_irq(hp_sdc_irqhook *callback);
+
+typedef struct {
+	int actidx;	/* Start of act.  Acts are atomic WRT I/O to SDC */
+	int idx;	/* Index within the act */
+	int endidx;	/* transaction is over and done if idx == endidx */
+	uint8_t *seq;	/* commands/data for the transaction */
+	union {
+	  hp_sdc_irqhook   *irqhook;	/* Callback, isr or tasklet context */
+	  struct semaphore *semaphore;	/* Semaphore to sleep on. */
+	} act;
+} hp_sdc_transaction;
+int hp_sdc_enqueue_transaction(hp_sdc_transaction *this);
+int hp_sdc_dequeue_transaction(hp_sdc_transaction *this);
+
+/* The HP_SDC_ACT* values are peculiar to this driver.
+ * Nuance: never HP_SDC_ACT_DATAIN | HP_SDC_ACT_DEALLOC, use another
+ * act to perform the dealloc.
+ */
+#define HP_SDC_ACT_PRECMD	0x01		/* Send a command first */
+#define HP_SDC_ACT_DATAREG	0x02		/* Set data registers */
+#define HP_SDC_ACT_DATAOUT	0x04		/* Send data bytes */
+#define HP_SDC_ACT_POSTCMD      0x08            /* Send command after */
+#define HP_SDC_ACT_DATAIN	0x10		/* Collect data after */
+#define HP_SDC_ACT_DURING	0x1f
+#define HP_SDC_ACT_SEMAPHORE    0x20            /* Raise semaphore after */
+#define HP_SDC_ACT_CALLBACK	0x40		/* Pass data to IRQ handler */
+#define HP_SDC_ACT_DEALLOC	0x80		/* Destroy transaction after */
+#define HP_SDC_ACT_AFTER	0xe0
+#define HP_SDC_ACT_DEAD		0x60		/* Act timed out. */
+
+/* Rest of the flags are straightforward representation of the SDC interface */
+#define HP_SDC_STATUS_IBF	0x02	/* Input buffer full */
+
+#define HP_SDC_STATUS_IRQMASK	0xf0	/* Bits containing "level 1" irq */
+#define HP_SDC_STATUS_PERIODIC  0x10    /* Periodic 10ms timer */
+#define HP_SDC_STATUS_USERTIMER 0x20    /* "Special purpose" timer */
+#define HP_SDC_STATUS_TIMER     0x30    /* Both PERIODIC and USERTIMER */
+#define HP_SDC_STATUS_REG	0x40	/* Data from an i8042 register */
+#define HP_SDC_STATUS_HILCMD    0x50	/* Command from HIL MLC */
+#define HP_SDC_STATUS_HILDATA   0x60	/* Data from HIL MLC */
+#define HP_SDC_STATUS_PUP	0x70	/* Sucessful power-up self test */
+#define HP_SDC_STATUS_KCOOKED	0x80	/* Key from cooked kbd */
+#define HP_SDC_STATUS_KRPG	0xc0	/* Key from Repeat Gen */
+#define HP_SDC_STATUS_KMOD_SUP	0x10	/* Shift key is up */
+#define HP_SDC_STATUS_KMOD_CUP	0x20	/* Control key is up */
+
+#define HP_SDC_NMISTATUS_FHS	0x40	/* NMI is a fast handshake irq */
+
+/* Internal i8042 registers (there are more, but they are not too useful). */
+
+#define HP_SDC_USE		0x02	/* Resource usage (including OB bit) */
+#define HP_SDC_IM		0x04	/* Interrupt mask */
+#define HP_SDC_CFG		0x11	/* Configuration register */
+#define HP_SDC_KBLANGUAGE	0x12	/* Keyboard language */
+
+#define HP_SDC_D0		0x70	/* General purpose data buffer 0 */
+#define HP_SDC_D1		0x71	/* General purpose data buffer 1 */
+#define HP_SDC_D2		0x72	/* General purpose data buffer 2 */
+#define HP_SDC_D3		0x73	/* General purpose data buffer 3 */
+#define HP_SDC_VT1		0x74	/* Timer for voice 1 */
+#define HP_SDC_VT2		0x75	/* Timer for voice 2 */
+#define HP_SDC_VT3		0x76	/* Timer for voice 3 */
+#define HP_SDC_VT4		0x77	/* Timer for voice 4 */
+#define HP_SDC_KBN		0x78	/* Which HIL devs are Nimitz */
+#define HP_SDC_KBC		0x79	/* Which HIL devs are cooked kbds */
+#define HP_SDC_LPS		0x7a	/* i8042's view of HIL status */
+#define HP_SDC_LPC		0x7b	/* i8042's view of HIL "control" */
+#define HP_SDC_RSV  		0x7c	/* Reserved "for testing" */
+#define HP_SDC_LPR		0x7d    /* i8042 count of HIL reconfigs */
+#define HP_SDC_XTD		0x7e    /* "Extended Configuration" register */
+#define HP_SDC_STR		0x7f    /* i8042 self-test result */
+
+/* Bitfields for above registers */
+#define HP_SDC_USE_LOOP		0x04	/* Command is currently on the loop. */
+
+#define HP_SDC_IM_MASK          0x1f    /* these bits not part of cmd/status */
+#define HP_SDC_IM_FH		0x10	/* Mask the fast handshake irq */
+#define HP_SDC_IM_PT		0x08	/* Mask the periodic timer irq */
+#define HP_SDC_IM_TIMERS	0x04	/* Mask the MT/DT/CT irq */
+#define HP_SDC_IM_RESET		0x02	/* Mask the reset key irq */
+#define HP_SDC_IM_HIL		0x01	/* Mask the HIL MLC irq */
+
+#define HP_SDC_CFG_ROLLOVER	0x08	/* WTF is "N-key rollover"? */
+#define HP_SDC_CFG_KBD		0x10	/* There is a keyboard */
+#define HP_SDC_CFG_NEW		0x20	/* Supports/uses HIL MLC */
+#define HP_SDC_CFG_KBD_OLD	0x03	/* keyboard code for non-HIL */
+#define HP_SDC_CFG_KBD_NEW	0x07	/* keyboard code from HIL autoconfig */
+#define HP_SDC_CFG_REV		0x40	/* Code revision bit */
+#define HP_SDC_CFG_IDPROM	0x80	/* IDPROM present in kbd (not HIL) */
+
+#define HP_SDC_LPS_NDEV		0x07	/* # devices autoconfigured on HIL */
+#define HP_SDC_LPS_ACSUCC	0x08	/* loop autoconfigured successfully */
+#define HP_SDC_LPS_ACFAIL	0x80	/* last loop autoconfigure failed */
+
+#define HP_SDC_LPC_APE_IPF	0x01	/* HIL MLC APE/IPF (autopoll) set */
+#define HP_SDC_LPC_ARCONERR	0x02	/* i8042 autoreconfigs loop on err */
+#define HP_SDC_LPC_ARCQUIET	0x03	/* i8042 doesn't report autoreconfigs*/
+#define HP_SDC_LPC_COOK		0x10	/* i8042 cooks devices in _KBN */
+#define HP_SDC_LPC_RC		0x80	/* causes autoreconfig */
+
+#define HP_SDC_XTD_REV		0x07	/* contains revision code */
+#define HP_SDC_XTD_REV_STRINGS(val, str) \
+switch (val) {						\
+	case 0x1: str = "1820-3712"; break;		\
+	case 0x2: str = "1820-4379"; break;		\
+	case 0x3: str = "1820-4784"; break;		\
+	default: str = "unknown";			\
+};
+#define HP_SDC_XTD_BEEPER	0x08	/* TI SN76494 beeper available */
+#define HP_SDC_XTD_BBRTC	0x20	/* OKI MSM-58321 BBRTC present */
+
+#define HP_SDC_CMD_LOAD_RT	0x31	/* Load real time (from 8042) */
+#define HP_SDC_CMD_LOAD_FHS	0x36	/* Load the fast handshake timer */
+#define HP_SDC_CMD_LOAD_MT	0x38	/* Load the match timer */
+#define HP_SDC_CMD_LOAD_DT	0x3B	/* Load the delay timer */
+#define HP_SDC_CMD_LOAD_CT	0x3E	/* Load the cycle timer */
+
+#define HP_SDC_CMD_SET_IM	0x40    /* 010xxxxx == set irq mask */
+
+/* The documents provided do not explicitly state that all registers betweem 
+ * 0x01 and 0x1f inclusive can be read by sending their register index as a 
+ * command, but this is implied and appears to be the case.
+ */
+#define HP_SDC_CMD_READ_RAM	0x00	/* Load from i8042 RAM (autoinc) */
+#define HP_SDC_CMD_READ_USE	0x02	/* Undocumented! Load from usage reg */
+#define HP_SDC_CMD_READ_IM	0x04	/* Load current interrupt mask */
+#define HP_SDC_CMD_READ_KCC	0x11	/* Load primary kbd config code */
+#define HP_SDC_CMD_READ_KLC	0x12	/* Load primary kbd language code */
+#define HP_SDC_CMD_READ_T1	0x13	/* Load timer output buffer byte 1 */
+#define HP_SDC_CMD_READ_T2	0x14	/* Load timer output buffer byte 1 */
+#define HP_SDC_CMD_READ_T3	0x15	/* Load timer output buffer byte 1 */
+#define HP_SDC_CMD_READ_T4	0x16	/* Load timer output buffer byte 1 */
+#define HP_SDC_CMD_READ_T5	0x17	/* Load timer output buffer byte 1 */
+#define HP_SDC_CMD_READ_D0	0xf0	/* Load from i8042 RAM location 0x70 */
+#define HP_SDC_CMD_READ_D1	0xf1	/* Load from i8042 RAM location 0x71 */
+#define HP_SDC_CMD_READ_D2	0xf2	/* Load from i8042 RAM location 0x72 */
+#define HP_SDC_CMD_READ_D3	0xf3	/* Load from i8042 RAM location 0x73 */
+#define HP_SDC_CMD_READ_VT1	0xf4	/* Load from i8042 RAM location 0x74 */
+#define HP_SDC_CMD_READ_VT2	0xf5	/* Load from i8042 RAM location 0x75 */
+#define HP_SDC_CMD_READ_VT3	0xf6	/* Load from i8042 RAM location 0x76 */
+#define HP_SDC_CMD_READ_VT4	0xf7	/* Load from i8042 RAM location 0x77 */
+#define HP_SDC_CMD_READ_KBN	0xf8	/* Load from i8042 RAM location 0x78 */
+#define HP_SDC_CMD_READ_KBC	0xf9	/* Load from i8042 RAM location 0x79 */
+#define HP_SDC_CMD_READ_LPS	0xfa	/* Load from i8042 RAM location 0x7a */
+#define HP_SDC_CMD_READ_LPC	0xfb	/* Load from i8042 RAM location 0x7b */
+#define HP_SDC_CMD_READ_RSV	0xfc	/* Load from i8042 RAM location 0x7c */
+#define HP_SDC_CMD_READ_LPR	0xfd	/* Load from i8042 RAM location 0x7d */
+#define HP_SDC_CMD_READ_XTD	0xfe	/* Load from i8042 RAM location 0x7e */
+#define HP_SDC_CMD_READ_STR	0xff	/* Load from i8042 RAM location 0x7f */
+
+#define HP_SDC_CMD_SET_ARD	0xA0	/* Set emulated autorepeat delay */
+#define HP_SDC_CMD_SET_ARR	0xA2	/* Set emulated autorepeat rate */
+#define HP_SDC_CMD_SET_BELL	0xA3	/* Set voice 3 params for "beep" cmd */
+#define HP_SDC_CMD_SET_RPGR	0xA6	/* Set "RPG" irq rate (doesn't work) */
+#define HP_SDC_CMD_SET_RTMS	0xAD	/* Set the RTC time (milliseconds) */
+#define HP_SDC_CMD_SET_RTD	0xAF	/* Set the RTC time (days) */
+#define HP_SDC_CMD_SET_FHS	0xB2	/* Set fast handshake timer */
+#define HP_SDC_CMD_SET_MT	0xB4	/* Set match timer */
+#define HP_SDC_CMD_SET_DT	0xB7	/* Set delay timer */
+#define HP_SDC_CMD_SET_CT	0xBA	/* Set cycle timer */
+#define HP_SDC_CMD_SET_RAMP	0xC1	/* Reset READ_RAM autoinc counter */
+#define HP_SDC_CMD_SET_D0	0xe0	/* Load to i8042 RAM location 0x70 */
+#define HP_SDC_CMD_SET_D1	0xe1	/* Load to i8042 RAM location 0x71 */
+#define HP_SDC_CMD_SET_D2	0xe2	/* Load to i8042 RAM location 0x72 */
+#define HP_SDC_CMD_SET_D3	0xe3	/* Load to i8042 RAM location 0x73 */
+#define HP_SDC_CMD_SET_VT1	0xe4	/* Load to i8042 RAM location 0x74 */
+#define HP_SDC_CMD_SET_VT2	0xe5	/* Load to i8042 RAM location 0x75 */
+#define HP_SDC_CMD_SET_VT3	0xe6	/* Load to i8042 RAM location 0x76 */
+#define HP_SDC_CMD_SET_VT4	0xe7	/* Load to i8042 RAM location 0x77 */
+#define HP_SDC_CMD_SET_KBN	0xe8	/* Load to i8042 RAM location 0x78 */
+#define HP_SDC_CMD_SET_KBC	0xe9	/* Load to i8042 RAM location 0x79 */
+#define HP_SDC_CMD_SET_LPS	0xea	/* Load to i8042 RAM location 0x7a */
+#define HP_SDC_CMD_SET_LPC	0xeb	/* Load to i8042 RAM location 0x7b */
+#define HP_SDC_CMD_SET_RSV	0xec	/* Load to i8042 RAM location 0x7c */
+#define HP_SDC_CMD_SET_LPR	0xed	/* Load to i8042 RAM location 0x7d */
+#define HP_SDC_CMD_SET_XTD	0xee	/* Load to i8042 RAM location 0x7e */
+#define HP_SDC_CMD_SET_STR	0xef	/* Load to i8042 RAM location 0x7f */
+
+#define HP_SDC_CMD_DO_RTCW	0xc2	/* i8042 RAM 0x70 --> RTC */
+#define HP_SDC_CMD_DO_RTCR	0xc3	/* RTC[0x70 0:3] --> irq/status/data */
+#define HP_SDC_CMD_DO_BEEP	0xc4	/* i8042 RAM 0x70-74  --> beeper,VT3 */
+#define HP_SDC_CMD_DO_HIL	0xc5	/* i8042 RAM 0x70-73 --> 
+					   HIL MLC R0,R1 i8042 HIL watchdog */
+
+/* Values used to (de)mangle input/output to/from the HIL MLC */
+#define HP_SDC_DATA		0x40	/* Data from an 8042 register */
+#define HP_SDC_HIL_CMD		0x50	/* Data from HIL MLC R1/8042 */
+#define HP_SDC_HIL_R1MASK	0x0f	/* Contents of HIL MLC R1 0:3 */
+#define HP_SDC_HIL_AUTO		0x10	/* Set if POL results from i8042 */   
+#define HP_SDC_HIL_ISERR	0x80	/* Has meaning as in next 4 values */
+#define HP_SDC_HIL_RC_DONE	0x80	/* i8042 auto-configured loop */
+#define HP_SDC_HIL_ERR		0x81	/* HIL MLC R2 had a bit set */
+#define HP_SDC_HIL_TO		0x82	/* i8042 HIL watchdog expired */
+#define HP_SDC_HIL_RC		0x84	/* i8042 is auto-configuring loop */
+#define HP_SDC_HIL_DAT		0x60	/* Data from HIL MLC R0 */
+
+
+typedef struct {
+	rwlock_t	ibf_lock;
+	rwlock_t	lock;		/* user/tasklet lock */
+	rwlock_t	rtq_lock;	/* isr/tasklet lock */
+	rwlock_t	hook_lock;	/* isr/user lock for handler add/del */
+
+	unsigned int	irq, nmi;	/* Our IRQ lines */
+	unsigned long	base_io, status_io, data_io; /* Our IO ports */
+
+	uint8_t		im;		/* Interrupt mask */
+	int		set_im; 	/* Interrupt mask needs to be set. */
+
+	int		ibf;		/* Last known status of IBF flag */
+	uint8_t		wi;		/* current i8042 write index */
+	uint8_t		r7[4];          /* current i8042[0x70 - 0x74] values */
+	uint8_t		r11, r7e;	/* Values from version/revision regs */
+
+	hp_sdc_irqhook	*timer, *reg, *hil, *pup, *cooked;
+
+#define HP_SDC_QUEUE_LEN 16
+	hp_sdc_transaction *tq[HP_SDC_QUEUE_LEN]; /* All pending read/writes */
+
+	int		rcurr, rqty;	/* Current read transact in process */
+	struct timeval	rtv;		/* Time when current read started */
+	int		wcurr;		/* Current write transact in process */
+
+	int		dev_err;	/* carries status from registration */
+#if defined(__hppa__)
+	struct parisc_device	*dev;
+#elif defined(__mc68000__)
+	void		*dev;
+#else
+#error No support for device registration on this arch yet.
+#endif
+
+	struct timer_list kicker;	/* Keeps below task alive */
+	struct tasklet_struct	task;
+
+} hp_i8042_sdc;
+
+#endif /* _LINUX_HP_SDC_H */

include/linux/input.h

···
 #define BUS_ADB			0x17
 #define BUS_I2C			0x18
 #define BUS_HOST		0x19
+#define BUS_GSC			0x1A
 
 /*
  * Values describing the status of an effect