Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 949 insertions, 0 deletions

diff --git a/drivers/input/serio/hil_mlc.c b/drivers/input/serio/hil_mlc.c
new file mode 100644
index 00000000000..c243cb6fdfc
--- /dev/null
+++ b/drivers/input/serio/hil_mlc.c
@@ -0,0 +1,949 @@
+/*
+ * HIL MLC state machine and serio interface 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
+ *
+ *
+ *	Driver theory of operation:
+ *
+ *	Some access methods and an ISR is defined by the sub-driver 
+ *	(e.g. hp_sdc_mlc.c).  These methods are expected to provide a 
+ *	few bits of logic in addition to raw access to the HIL MLC, 
+ *	specifically, the ISR, which is entirely registered by the 
+ *	sub-driver and invoked directly, must check for record 
+ *	termination or packet match, at which point a semaphore must
+ *	be cleared and then the hil_mlcs_tasklet must be scheduled.
+ *
+ *	The hil_mlcs_tasklet processes the state machine for all MLCs
+ *	each time it runs, checking each MLC's progress at the current
+ *	node in the state machine, and moving the MLC to subsequent nodes
+ *	in the state machine when appropriate.  It will reschedule
+ *	itself if output is pending.  (This rescheduling should be replaced
+ *	at some point with a sub-driver-specific mechanism.)
+ *
+ *	A timer task prods the tasklet once per second to prevent 
+ *	hangups when attached devices do not return expected data
+ *	and to initiate probes of the loop for new devices.
+ */
+
+#include <linux/hil_mlc.h>
+#include <linux/errno.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/timer.h>
+#include <linux/sched.h>
+#include <linux/list.h>
+
+MODULE_AUTHOR("Brian S. Julin <bri@calyx.com>");
+MODULE_DESCRIPTION("HIL MLC serio");
+MODULE_LICENSE("Dual BSD/GPL");
+
+EXPORT_SYMBOL(hil_mlc_register);
+EXPORT_SYMBOL(hil_mlc_unregister);
+
+#define PREFIX "HIL MLC: "
+
+static LIST_HEAD(hil_mlcs);
+static DEFINE_RWLOCK(hil_mlcs_lock);
+static struct timer_list	hil_mlcs_kicker;
+static int			hil_mlcs_probe;
+
+static void hil_mlcs_process(unsigned long unused);
+DECLARE_TASKLET_DISABLED(hil_mlcs_tasklet, hil_mlcs_process, 0);
+
+
+/* #define HIL_MLC_DEBUG */
+
+/********************** Device info/instance management **********************/
+
+static void hil_mlc_clear_di_map (hil_mlc *mlc, int val) {
+	int j;
+	for (j = val; j < 7 ; j++) {
+		mlc->di_map[j] = -1;
+	}
+}
+
+static void hil_mlc_clear_di_scratch (hil_mlc *mlc) {
+	memset(&(mlc->di_scratch), 0, sizeof(mlc->di_scratch));
+}
+
+static void hil_mlc_copy_di_scratch (hil_mlc *mlc, int idx) {
+	memcpy(&(mlc->di[idx]), &(mlc->di_scratch), sizeof(mlc->di_scratch));
+}
+
+static int hil_mlc_match_di_scratch (hil_mlc *mlc) {
+	int idx;
+
+	for (idx = 0; idx < HIL_MLC_DEVMEM; idx++) {
+		int j, found;
+
+		/* In-use slots are not eligible. */
+		found = 0;
+		for (j = 0; j < 7 ; j++) {
+			if (mlc->di_map[j] == idx) found++;
+		}
+		if (found) continue;
+		if (!memcmp(mlc->di + idx, 
+			    &(mlc->di_scratch), 
+			    sizeof(mlc->di_scratch))) break;
+	}
+	return((idx >= HIL_MLC_DEVMEM) ? -1 : idx);
+}
+
+static int hil_mlc_find_free_di(hil_mlc *mlc) {
+	int idx;
+	/* TODO: Pick all-zero slots first, failing that, 
+	 * randomize the slot picked among those eligible. 
+	 */
+	for (idx = 0; idx < HIL_MLC_DEVMEM; idx++) {
+		int j, found;
+		found = 0;
+		for (j = 0; j < 7 ; j++) {
+			if (mlc->di_map[j] == idx) found++;
+		}
+		if (!found) break;
+	}
+	return(idx); /* Note: It is guaranteed at least one above will match */
+}
+
+static inline void hil_mlc_clean_serio_map(hil_mlc *mlc) {
+	int idx;
+	for (idx = 0; idx < HIL_MLC_DEVMEM; idx++) {
+		int j, found;
+		found = 0;
+		for (j = 0; j < 7 ; j++) {
+			if (mlc->di_map[j] == idx) found++;
+		}
+		if (!found) mlc->serio_map[idx].di_revmap = -1;
+	}
+}
+
+static void hil_mlc_send_polls(hil_mlc *mlc) {
+	int did, i, cnt;
+	struct serio *serio;
+	struct serio_driver *drv;
+
+	i = cnt = 0;
+	did = (mlc->ipacket[0] & HIL_PKT_ADDR_MASK) >> 8;
+	serio = did ? mlc->serio[mlc->di_map[did - 1]] : NULL;
+	drv = (serio != NULL) ? serio->drv : NULL;
+
+	while (mlc->icount < 15 - i) {
+		hil_packet p;
+		p = mlc->ipacket[i];
+		if (did != (p & HIL_PKT_ADDR_MASK) >> 8) {
+			if (drv == NULL || drv->interrupt == NULL) goto skip;
+
+			drv->interrupt(serio, 0, 0, NULL);
+			drv->interrupt(serio, HIL_ERR_INT >> 16, 0, NULL);
+			drv->interrupt(serio, HIL_PKT_CMD >> 8,  0, NULL);
+			drv->interrupt(serio, HIL_CMD_POL + cnt, 0, NULL);
+		skip:
+			did = (p & HIL_PKT_ADDR_MASK) >> 8;
+			serio = did ? mlc->serio[mlc->di_map[did-1]] : NULL;
+			drv = (serio != NULL) ? serio->drv : NULL;
+			cnt = 0;
+		}
+		cnt++; i++;
+		if (drv == NULL || drv->interrupt == NULL) continue;
+		drv->interrupt(serio, (p >> 24), 0, NULL);
+		drv->interrupt(serio, (p >> 16) & 0xff, 0, NULL);
+		drv->interrupt(serio, (p >> 8) & ~HIL_PKT_ADDR_MASK, 0, NULL);
+		drv->interrupt(serio, p & 0xff, 0, NULL);
+	}
+}
+
+/*************************** State engine *********************************/
+
+#define HILSEN_SCHED	0x000100	/* Schedule the tasklet		*/
+#define HILSEN_BREAK	0x000200	/* Wait until next pass		*/
+#define HILSEN_UP	0x000400	/* relative node#, decrement	*/
+#define HILSEN_DOWN	0x000800	/* relative node#, increment	*/
+#define HILSEN_FOLLOW	0x001000	/* use retval as next node#	*/
+
+#define HILSEN_MASK	0x0000ff
+#define HILSEN_START	0
+#define HILSEN_RESTART	1
+#define HILSEN_DHR	9
+#define HILSEN_DHR2	10
+#define HILSEN_IFC	14
+#define HILSEN_HEAL0	16
+#define HILSEN_HEAL	18
+#define HILSEN_ACF      21
+#define HILSEN_ACF2	22
+#define HILSEN_DISC0	25
+#define HILSEN_DISC	27
+#define HILSEN_MATCH	40
+#define HILSEN_OPERATE	41
+#define HILSEN_PROBE	44
+#define HILSEN_DSR	52
+#define HILSEN_REPOLL	55
+#define HILSEN_IFCACF	58
+#define HILSEN_END	60
+
+#define HILSEN_NEXT	(HILSEN_DOWN | 1)
+#define HILSEN_SAME	(HILSEN_DOWN | 0)
+#define HILSEN_LAST	(HILSEN_UP | 1)
+
+#define HILSEN_DOZE	(HILSEN_SAME | HILSEN_SCHED | HILSEN_BREAK)
+#define HILSEN_SLEEP	(HILSEN_SAME | HILSEN_BREAK)
+
+static int hilse_match(hil_mlc *mlc, int unused) {
+	int rc;
+	rc = hil_mlc_match_di_scratch(mlc);
+	if (rc == -1) {
+		rc = hil_mlc_find_free_di(mlc);
+		if (rc == -1) goto err;
+#ifdef HIL_MLC_DEBUG
+		printk(KERN_DEBUG PREFIX "new in slot %i\n", rc);
+#endif
+		hil_mlc_copy_di_scratch(mlc, rc);
+		mlc->di_map[mlc->ddi] = rc;
+		mlc->serio_map[rc].di_revmap = mlc->ddi;
+		hil_mlc_clean_serio_map(mlc);
+		serio_rescan(mlc->serio[rc]);
+		return -1;
+	}
+	mlc->di_map[mlc->ddi] = rc;
+#ifdef HIL_MLC_DEBUG
+	printk(KERN_DEBUG PREFIX "same in slot %i\n", rc);
+#endif
+	mlc->serio_map[rc].di_revmap = mlc->ddi;
+	hil_mlc_clean_serio_map(mlc);
+	return 0;
+ err:
+	printk(KERN_ERR PREFIX "Residual device slots exhausted, close some serios!\n");
+	return 1;
+}
+
+/* An LCV used to prevent runaway loops, forces 5 second sleep when reset. */
+static int hilse_init_lcv(hil_mlc *mlc, int unused) {
+	struct timeval tv;
+
+	do_gettimeofday(&tv);
+
+	if(mlc->lcv == 0) goto restart;  /* First init, no need to dally */
+	if(tv.tv_sec - mlc->lcv_tv.tv_sec < 5) return -1;
+ restart:
+	mlc->lcv_tv = tv;
+	mlc->lcv = 0;
+	return 0;
+}
+
+static int hilse_inc_lcv(hil_mlc *mlc, int lim) {
+	if (mlc->lcv++ >= lim) return -1;
+	return 0;
+}
+
+#if 0
+static int hilse_set_lcv(hil_mlc *mlc, int val) {
+	mlc->lcv = val;
+	return 0;
+}
+#endif
+
+/* Management of the discovered device index (zero based, -1 means no devs) */
+static int hilse_set_ddi(hil_mlc *mlc, int val) {
+	mlc->ddi = val;
+	hil_mlc_clear_di_map(mlc, val + 1);
+	return 0;
+}
+
+static int hilse_dec_ddi(hil_mlc *mlc, int unused) {
+	mlc->ddi--;
+	if (mlc->ddi <= -1) { 
+		mlc->ddi = -1;
+		hil_mlc_clear_di_map(mlc, 0);
+		return -1;
+	}
+	hil_mlc_clear_di_map(mlc, mlc->ddi + 1);
+	return 0;
+}
+
+static int hilse_inc_ddi(hil_mlc *mlc, int unused) {
+	if (mlc->ddi >= 6) {
+		BUG();
+		return -1;
+	}
+	mlc->ddi++;
+	return 0;
+}
+
+static int hilse_take_idd(hil_mlc *mlc, int unused) {
+	int i;
+
+	/* Help the state engine: 
+	 * Is this a real IDD response or just an echo? 
+	 *
+	 * Real IDD response does not start with a command. 
+	 */
+	if (mlc->ipacket[0] & HIL_PKT_CMD) goto bail;
+	/* Should have the command echoed further down. */
+	for (i = 1; i < 16; i++) {
+		if (((mlc->ipacket[i] & HIL_PKT_ADDR_MASK) == 
+		     (mlc->ipacket[0] & HIL_PKT_ADDR_MASK)) &&
+		    (mlc->ipacket[i] & HIL_PKT_CMD) && 
+		    ((mlc->ipacket[i] & HIL_PKT_DATA_MASK) == HIL_CMD_IDD))
+			break;
+	}
+	if (i > 15) goto bail;
+	/* And the rest of the packets should still be clear. */
+	while (++i < 16) {
+		if (mlc->ipacket[i]) break;
+	}
+	if (i < 16) goto bail;
+	for (i = 0; i < 16; i++) {
+		mlc->di_scratch.idd[i] = 
+			mlc->ipacket[i] & HIL_PKT_DATA_MASK;
+	}
+	/* Next step is to see if RSC supported */
+	if (mlc->di_scratch.idd[1] & HIL_IDD_HEADER_RSC) 
+		return HILSEN_NEXT;
+	if (mlc->di_scratch.idd[1] & HIL_IDD_HEADER_EXD) 
+		return HILSEN_DOWN | 4;
+	return 0;
+ bail:
+	mlc->ddi--;
+	return -1; /* This should send us off to ACF */
+}
+
+static int hilse_take_rsc(hil_mlc *mlc, int unused) {
+	int i;
+
+	for (i = 0; i < 16; i++) {
+		mlc->di_scratch.rsc[i] = 
+			mlc->ipacket[i] & HIL_PKT_DATA_MASK;
+	}
+	/* Next step is to see if EXD supported (IDD has already been read) */
+	if (mlc->di_scratch.idd[1] & HIL_IDD_HEADER_EXD) 
+		return HILSEN_NEXT;
+	return 0;
+}
+
+static int hilse_take_exd(hil_mlc *mlc, int unused) {
+	int i;
+
+	for (i = 0; i < 16; i++) {
+		mlc->di_scratch.exd[i] = 
+			mlc->ipacket[i] & HIL_PKT_DATA_MASK;
+	}
+	/* Next step is to see if RNM supported. */
+	if (mlc->di_scratch.exd[0] & HIL_EXD_HEADER_RNM) 
+		return HILSEN_NEXT;
+	return 0;
+}
+
+static int hilse_take_rnm(hil_mlc *mlc, int unused) {
+	int i;
+
+	for (i = 0; i < 16; i++) {
+		mlc->di_scratch.rnm[i] = 
+			mlc->ipacket[i] & HIL_PKT_DATA_MASK;
+	}
+	do {
+	  char nam[17];
+	  snprintf(nam, 16, "%s", mlc->di_scratch.rnm);
+	  nam[16] = '\0';
+	  printk(KERN_INFO PREFIX "Device name gotten: %s\n", nam);
+	} while (0);
+	return 0;
+}
+
+static int hilse_operate(hil_mlc *mlc, int repoll) { 
+
+	if (mlc->opercnt == 0) hil_mlcs_probe = 0;
+	mlc->opercnt = 1;
+
+	hil_mlc_send_polls(mlc);
+
+	if (!hil_mlcs_probe) return 0;
+	hil_mlcs_probe = 0;
+	mlc->opercnt = 0;
+	return 1;
+}
+
+#define FUNC(funct, funct_arg, zero_rc, neg_rc, pos_rc) \
+{ HILSE_FUNC,		{ func: &funct }, funct_arg, zero_rc, neg_rc, pos_rc },
+#define OUT(pack) \
+{ HILSE_OUT,		{ packet: pack }, 0, HILSEN_NEXT, HILSEN_DOZE, 0 },
+#define CTS \
+{ HILSE_CTS,		{ packet: 0    }, 0, HILSEN_NEXT | HILSEN_SCHED | HILSEN_BREAK, HILSEN_DOZE, 0 },
+#define EXPECT(comp, to, got, got_wrong, timed_out) \
+{ HILSE_EXPECT,		{ packet: comp }, to, got, got_wrong, timed_out },
+#define EXPECT_LAST(comp, to, got, got_wrong, timed_out) \
+{ HILSE_EXPECT_LAST,	{ packet: comp }, to, got, got_wrong, timed_out },
+#define EXPECT_DISC(comp, to, got, got_wrong, timed_out) \
+{ HILSE_EXPECT_DISC,	{ packet: comp }, to, got, got_wrong, timed_out },
+#define IN(to, got, got_error, timed_out) \
+{ HILSE_IN,		{ packet: 0    }, to, got, got_error, timed_out },
+#define OUT_DISC(pack) \
+{ HILSE_OUT_DISC,	{ packet: pack }, 0, 0, 0, 0 },
+#define OUT_LAST(pack) \
+{ HILSE_OUT_LAST,	{ packet: pack }, 0, 0, 0, 0 },
+
+struct hilse_node hil_mlc_se[HILSEN_END] = {
+
+	/* 0  HILSEN_START */
+	FUNC(hilse_init_lcv, 0,	HILSEN_NEXT,	HILSEN_SLEEP,	0)
+
+	/* 1  HILSEN_RESTART */
+	FUNC(hilse_inc_lcv, 10,	HILSEN_NEXT,	HILSEN_START,  0)
+	OUT(HIL_CTRL_ONLY)			/* Disable APE */
+	CTS
+
+#define TEST_PACKET(x) \
+(HIL_PKT_CMD | (x << HIL_PKT_ADDR_SHIFT) | x << 4 | x)
+
+	OUT(HIL_DO_ALTER_CTRL | HIL_CTRL_TEST | TEST_PACKET(0x5))
+	EXPECT(HIL_ERR_INT | TEST_PACKET(0x5),
+	       2000,		HILSEN_NEXT,	HILSEN_RESTART,	HILSEN_RESTART)
+	OUT(HIL_DO_ALTER_CTRL | HIL_CTRL_TEST | TEST_PACKET(0xa))
+	EXPECT(HIL_ERR_INT | TEST_PACKET(0xa),
+	       2000,		HILSEN_NEXT,	HILSEN_RESTART,	HILSEN_RESTART)
+	OUT(HIL_CTRL_ONLY | 0)			/* Disable test mode */
+	
+	/* 9  HILSEN_DHR */
+	FUNC(hilse_init_lcv, 0,	HILSEN_NEXT,	HILSEN_SLEEP,	0)
+
+	/* 10 HILSEN_DHR2 */
+	FUNC(hilse_inc_lcv, 10,	HILSEN_NEXT,	HILSEN_START,	0)
+	FUNC(hilse_set_ddi, -1,	HILSEN_NEXT,	0,		0)
+	OUT(HIL_PKT_CMD | HIL_CMD_DHR)
+	IN(300000,		HILSEN_DHR2,	HILSEN_DHR2,	HILSEN_NEXT)
+
+	/* 14 HILSEN_IFC */
+  	OUT(HIL_PKT_CMD | HIL_CMD_IFC)
+	EXPECT(HIL_PKT_CMD | HIL_CMD_IFC | HIL_ERR_INT,
+	       20000,		HILSEN_DISC,	HILSEN_DHR2,	HILSEN_NEXT )
+
+	/* If devices are there, they weren't in PUP or other loopback mode.
+	 * We're more concerned at this point with restoring operation
+	 * to devices than discovering new ones, so we try to salvage
+	 * the loop configuration by closing off the loop.
+	 */
+
+	/* 16 HILSEN_HEAL0 */
+	FUNC(hilse_dec_ddi, 0,	HILSEN_NEXT,	HILSEN_ACF,	0)
+	FUNC(hilse_inc_ddi, 0,	HILSEN_NEXT,	0,		0)
+
+	/* 18 HILSEN_HEAL */
+	OUT_LAST(HIL_CMD_ELB)
+	EXPECT_LAST(HIL_CMD_ELB | HIL_ERR_INT, 
+		    20000,	HILSEN_REPOLL,	HILSEN_DSR,	HILSEN_NEXT)
+	FUNC(hilse_dec_ddi, 0,	HILSEN_HEAL,	HILSEN_NEXT,	0)
+
+	/* 21 HILSEN_ACF */
+	FUNC(hilse_init_lcv, 0,	HILSEN_NEXT,	HILSEN_DOZE,	0)
+
+	/* 22 HILSEN_ACF2 */
+	FUNC(hilse_inc_lcv, 10,	HILSEN_NEXT,	HILSEN_START,	0)
+	OUT(HIL_PKT_CMD | HIL_CMD_ACF | 1)
+	IN(20000,		HILSEN_NEXT,	HILSEN_DSR,	HILSEN_NEXT)
+
+	/* 25 HILSEN_DISC0 */
+	OUT_DISC(HIL_PKT_CMD | HIL_CMD_ELB)
+	EXPECT_DISC(HIL_PKT_CMD | HIL_CMD_ELB | HIL_ERR_INT,
+	       20000,		HILSEN_NEXT,	HILSEN_DSR,	HILSEN_DSR)
+
+	/* Only enter here if response just received */
+	/* 27 HILSEN_DISC */
+	OUT_DISC(HIL_PKT_CMD | HIL_CMD_IDD)
+	EXPECT_DISC(HIL_PKT_CMD | HIL_CMD_IDD | HIL_ERR_INT,
+	       20000,		HILSEN_NEXT,	HILSEN_DSR,	HILSEN_START)
+	FUNC(hilse_inc_ddi,  0,	HILSEN_NEXT,	HILSEN_START,	0)
+	FUNC(hilse_take_idd, 0,	HILSEN_MATCH,	HILSEN_IFCACF,	HILSEN_FOLLOW)
+	OUT_LAST(HIL_PKT_CMD | HIL_CMD_RSC)
+	EXPECT_LAST(HIL_PKT_CMD | HIL_CMD_RSC | HIL_ERR_INT,
+	       30000,		HILSEN_NEXT,	HILSEN_DSR,	HILSEN_DSR)
+	FUNC(hilse_take_rsc, 0,	HILSEN_MATCH,	0,		HILSEN_FOLLOW)
+	OUT_LAST(HIL_PKT_CMD | HIL_CMD_EXD)
+	EXPECT_LAST(HIL_PKT_CMD | HIL_CMD_EXD | HIL_ERR_INT,
+	       30000,		HILSEN_NEXT,	HILSEN_DSR,	HILSEN_DSR)
+	FUNC(hilse_take_exd, 0,	HILSEN_MATCH,	0,		HILSEN_FOLLOW)
+	OUT_LAST(HIL_PKT_CMD | HIL_CMD_RNM)
+	EXPECT_LAST(HIL_PKT_CMD | HIL_CMD_RNM | HIL_ERR_INT,
+	       30000,		HILSEN_NEXT,	HILSEN_DSR,	HILSEN_DSR)
+	FUNC(hilse_take_rnm, 0, HILSEN_MATCH,	0,		0)
+
+	/* 40 HILSEN_MATCH */
+	FUNC(hilse_match, 0,	HILSEN_NEXT,	HILSEN_NEXT,	/* TODO */ 0)
+
+	/* 41 HILSEN_OPERATE */
+	OUT(HIL_PKT_CMD | HIL_CMD_POL)
+	EXPECT(HIL_PKT_CMD | HIL_CMD_POL | HIL_ERR_INT,
+	       20000,		HILSEN_NEXT,	HILSEN_DSR,	HILSEN_NEXT)
+	FUNC(hilse_operate, 0,	HILSEN_OPERATE,	HILSEN_IFC,	HILSEN_NEXT)
+
+	/* 44 HILSEN_PROBE */
+	OUT_LAST(HIL_PKT_CMD | HIL_CMD_EPT)
+	IN(10000, 		HILSEN_DISC,	HILSEN_DSR,	HILSEN_NEXT)
+	OUT_DISC(HIL_PKT_CMD | HIL_CMD_ELB)
+	IN(10000,		HILSEN_DISC,	HILSEN_DSR,	HILSEN_NEXT)
+	OUT(HIL_PKT_CMD | HIL_CMD_ACF | 1)
+	IN(10000,		HILSEN_DISC0,	HILSEN_DSR,	HILSEN_NEXT)
+	OUT_LAST(HIL_PKT_CMD | HIL_CMD_ELB)
+	IN(10000,		HILSEN_OPERATE,	HILSEN_DSR,	HILSEN_DSR)
+
+	/* 52 HILSEN_DSR */
+	FUNC(hilse_set_ddi, -1,	HILSEN_NEXT,	0,		0)
+	OUT(HIL_PKT_CMD | HIL_CMD_DSR)
+	IN(20000, 		HILSEN_DHR,	HILSEN_DHR,	HILSEN_IFC)
+
+	/* 55 HILSEN_REPOLL */
+	OUT(HIL_PKT_CMD | HIL_CMD_RPL)
+	EXPECT(HIL_PKT_CMD | HIL_CMD_RPL | HIL_ERR_INT,
+	       20000,		HILSEN_NEXT,	HILSEN_DSR,	HILSEN_NEXT)
+	FUNC(hilse_operate, 1,	HILSEN_OPERATE,	HILSEN_IFC,	HILSEN_PROBE)
+
+	/* 58 HILSEN_IFCACF */
+  	OUT(HIL_PKT_CMD | HIL_CMD_IFC)
+	EXPECT(HIL_PKT_CMD | HIL_CMD_IFC | HIL_ERR_INT,
+	       20000,		HILSEN_ACF2,	HILSEN_DHR2,	HILSEN_HEAL)
+
+	/* 60 HILSEN_END */
+};
+
+static inline void hilse_setup_input(hil_mlc *mlc, struct hilse_node *node) {
+
+	switch (node->act) {
+	case HILSE_EXPECT_DISC:
+		mlc->imatch = node->object.packet;
+		mlc->imatch |= ((mlc->ddi + 2) << HIL_PKT_ADDR_SHIFT);
+		break;
+	case HILSE_EXPECT_LAST:
+		mlc->imatch = node->object.packet;
+		mlc->imatch |= ((mlc->ddi + 1) << HIL_PKT_ADDR_SHIFT);
+		break;
+	case HILSE_EXPECT:
+		mlc->imatch = node->object.packet;
+		break;
+	case HILSE_IN:
+		mlc->imatch = 0;
+		break;
+	default:
+		BUG();
+	}
+	mlc->istarted = 1;
+	mlc->intimeout = node->arg;
+	do_gettimeofday(&(mlc->instart));
+	mlc->icount = 15;
+	memset(mlc->ipacket, 0, 16 * sizeof(hil_packet));
+	if (down_trylock(&(mlc->isem))) BUG();
+
+	return;
+}
+
+#ifdef HIL_MLC_DEBUG
+static int doze = 0;
+static int seidx; /* For debug */
+static int kick = 1;
+#endif
+
+static int hilse_donode (hil_mlc *mlc) {
+	struct hilse_node *node;
+	int nextidx = 0;
+	int sched_long = 0;
+	unsigned long flags;
+
+#ifdef HIL_MLC_DEBUG
+	if (mlc->seidx && (mlc->seidx != seidx)  && mlc->seidx != 41 && mlc->seidx != 42 && mlc->seidx != 43) {
+	  printk(KERN_DEBUG PREFIX "z%i \n%s {%i}", doze, kick ? "K" : "", mlc->seidx);
+		doze = 0;
+	}
+	kick = 0;
+
+	seidx = mlc->seidx;
+#endif
+	node = hil_mlc_se + mlc->seidx;
+
+	switch (node->act) {
+		int rc;
+		hil_packet pack;
+
+	case HILSE_FUNC:
+		if (node->object.func == NULL) break;
+		rc = node->object.func(mlc, node->arg);
+		nextidx = (rc > 0) ? node->ugly : 
+			((rc < 0) ? node->bad : node->good);
+		if (nextidx == HILSEN_FOLLOW) nextidx = rc;
+		break;
+	case HILSE_EXPECT_LAST:
+	case HILSE_EXPECT_DISC:
+	case HILSE_EXPECT:
+	case HILSE_IN:
+		/* Already set up from previous HILSE_OUT_* */
+		write_lock_irqsave(&(mlc->lock), flags);
+		rc = mlc->in(mlc, node->arg);
+		if (rc == 2)  {
+			nextidx = HILSEN_DOZE;
+			sched_long = 1;
+			write_unlock_irqrestore(&(mlc->lock), flags);
+			break;
+		}
+		if (rc == 1)		nextidx = node->ugly;
+		else if (rc == 0)	nextidx = node->good;
+		else			nextidx = node->bad;
+		mlc->istarted = 0;
+		write_unlock_irqrestore(&(mlc->lock), flags);
+		break;
+	case HILSE_OUT_LAST:
+		write_lock_irqsave(&(mlc->lock), flags);
+		pack = node->object.packet;
+		pack |= ((mlc->ddi + 1) << HIL_PKT_ADDR_SHIFT);
+		goto out;
+	case HILSE_OUT_DISC:
+		write_lock_irqsave(&(mlc->lock), flags);
+		pack = node->object.packet;
+		pack |= ((mlc->ddi + 2) << HIL_PKT_ADDR_SHIFT);
+		goto out;
+	case HILSE_OUT:
+		write_lock_irqsave(&(mlc->lock), flags);
+		pack = node->object.packet;
+	out:
+		if (mlc->istarted) goto out2;
+		/* Prepare to receive input */
+		if ((node + 1)->act & HILSE_IN)
+			hilse_setup_input(mlc, node + 1);
+
+	out2:
+		write_unlock_irqrestore(&(mlc->lock), flags);
+
+		if (down_trylock(&mlc->osem)) {
+			nextidx = HILSEN_DOZE;
+			break;
+		}
+		up(&mlc->osem);
+
+		write_lock_irqsave(&(mlc->lock), flags);
+		if (!(mlc->ostarted)) {
+			mlc->ostarted = 1;
+			mlc->opacket = pack;
+			mlc->out(mlc);
+			nextidx = HILSEN_DOZE;
+			write_unlock_irqrestore(&(mlc->lock), flags);
+			break;
+		}
+		mlc->ostarted = 0;
+		do_gettimeofday(&(mlc->instart));
+		write_unlock_irqrestore(&(mlc->lock), flags);
+		nextidx = HILSEN_NEXT;
+		break;
+	case HILSE_CTS:
+		nextidx = mlc->cts(mlc) ? node->bad : node->good;
+		break;
+	default:
+		BUG();
+		nextidx = 0;
+		break;
+	}
+
+#ifdef HIL_MLC_DEBUG
+	if (nextidx == HILSEN_DOZE) doze++;
+#endif
+
+	while (nextidx & HILSEN_SCHED) {
+		struct timeval tv;
+
+		if (!sched_long) goto sched;
+
+		do_gettimeofday(&tv);
+		tv.tv_usec += 1000000 * (tv.tv_sec - mlc->instart.tv_sec);
+		tv.tv_usec -= mlc->instart.tv_usec;
+		if (tv.tv_usec >= mlc->intimeout) goto sched;
+		tv.tv_usec = (mlc->intimeout - tv.tv_usec) * HZ / 1000000;
+		if (!tv.tv_usec) goto sched;
+		mod_timer(&hil_mlcs_kicker, jiffies + tv.tv_usec);
+		break;
+	sched:
+		tasklet_schedule(&hil_mlcs_tasklet);
+		break;
+	} 
+	if (nextidx & HILSEN_DOWN) mlc->seidx += nextidx & HILSEN_MASK;
+	else if (nextidx & HILSEN_UP) mlc->seidx -= nextidx & HILSEN_MASK;
+	else mlc->seidx = nextidx & HILSEN_MASK;
+
+	if (nextidx & HILSEN_BREAK)	return 1;
+	return 0;
+}
+
+/******************** tasklet context functions **************************/
+static void hil_mlcs_process(unsigned long unused) {
+	struct list_head *tmp;
+
+	read_lock(&hil_mlcs_lock);
+	list_for_each(tmp, &hil_mlcs) {
+		struct hil_mlc *mlc = list_entry(tmp, hil_mlc, list);
+		while (hilse_donode(mlc) == 0) {
+#ifdef HIL_MLC_DEBUG
+		  if (mlc->seidx != 41 && 
+		      mlc->seidx != 42 && 
+		      mlc->seidx != 43) 
+		    printk(KERN_DEBUG PREFIX " + ");
+#endif
+		};
+	}
+	read_unlock(&hil_mlcs_lock);
+}
+
+/************************* Keepalive timer task *********************/
+
+void hil_mlcs_timer (unsigned long data) {
+	hil_mlcs_probe = 1;
+	tasklet_schedule(&hil_mlcs_tasklet);
+	/* Re-insert the periodic task. */
+	if (!timer_pending(&hil_mlcs_kicker))
+		mod_timer(&hil_mlcs_kicker, jiffies + HZ);
+}
+
+/******************** user/kernel context functions **********************/
+
+static int hil_mlc_serio_write(struct serio *serio, unsigned char c) {
+	struct hil_mlc_serio_map *map;
+	struct hil_mlc *mlc;
+	struct serio_driver *drv;
+	uint8_t *idx, *last;
+
+	map = serio->port_data;
+	if (map == NULL) {
+		BUG();
+		return -EIO;
+	}
+	mlc = map->mlc;
+	if (mlc == NULL) {
+		BUG();
+		return -EIO;
+	}
+	mlc->serio_opacket[map->didx] |= 
+		((hil_packet)c) << (8 * (3 - mlc->serio_oidx[map->didx]));
+
+	if (mlc->serio_oidx[map->didx] >= 3) {
+		/* for now only commands */
+		if (!(mlc->serio_opacket[map->didx] & HIL_PKT_CMD)) 
+			return -EIO;
+		switch (mlc->serio_opacket[map->didx] & HIL_PKT_DATA_MASK) {
+		case HIL_CMD_IDD:
+			idx = mlc->di[map->didx].idd;
+			goto emu;
+		case HIL_CMD_RSC:
+			idx = mlc->di[map->didx].rsc;
+			goto emu;
+		case HIL_CMD_EXD:
+			idx = mlc->di[map->didx].exd;
+			goto emu;
+		case HIL_CMD_RNM:
+			idx = mlc->di[map->didx].rnm;
+			goto emu;
+		default:
+			break;
+		}
+		mlc->serio_oidx[map->didx] = 0;
+		mlc->serio_opacket[map->didx] = 0;
+	}
+
+	mlc->serio_oidx[map->didx]++;
+	return -EIO;
+ emu:
+	drv = serio->drv;
+	if (drv == NULL) {
+		BUG();
+		return -EIO;
+	}
+	last = idx + 15;
+	while ((last != idx) && (*last == 0)) last--;
+
+	while (idx != last) {
+		drv->interrupt(serio, 0, 0, NULL);
+		drv->interrupt(serio, HIL_ERR_INT >> 16, 0, NULL);
+		drv->interrupt(serio, 0, 0, NULL);
+		drv->interrupt(serio, *idx, 0, NULL);
+		idx++;
+	}
+	drv->interrupt(serio, 0, 0, NULL);
+	drv->interrupt(serio, HIL_ERR_INT >> 16, 0, NULL);
+	drv->interrupt(serio, HIL_PKT_CMD >> 8, 0, NULL);
+	drv->interrupt(serio, *idx, 0, NULL);
+	
+	mlc->serio_oidx[map->didx] = 0;
+	mlc->serio_opacket[map->didx] = 0;
+
+	return 0;
+}
+
+static int hil_mlc_serio_open(struct serio *serio) {
+	struct hil_mlc_serio_map *map;
+	struct hil_mlc *mlc;
+
+	if (serio->private != NULL) return -EBUSY;
+
+	map = serio->port_data;
+	if (map == NULL) {
+		BUG();
+		return -ENODEV;
+	}
+	mlc = map->mlc;
+	if (mlc == NULL) {
+		BUG();
+		return -ENODEV;
+	}
+
+	return 0;
+}
+
+static void hil_mlc_serio_close(struct serio *serio) {
+	struct hil_mlc_serio_map *map;
+	struct hil_mlc *mlc;
+
+	map = serio->port_data;
+	if (map == NULL) {
+		BUG();
+		return;
+	}
+	mlc = map->mlc;
+	if (mlc == NULL) {
+		BUG();
+		return;
+	}
+
+	serio->private = NULL;
+	serio->drv = NULL;
+	/* TODO wake up interruptable */
+}
+
+int hil_mlc_register(hil_mlc *mlc) {
+	int i;
+        unsigned long flags;
+
+	if (mlc == NULL) {
+		return -EINVAL;
+	}
+
+	mlc->istarted = 0;
+        mlc->ostarted = 0;
+
+        rwlock_init(&mlc->lock);
+        init_MUTEX(&(mlc->osem));
+
+        init_MUTEX(&(mlc->isem));
+        mlc->icount = -1;
+        mlc->imatch = 0;
+
+	mlc->opercnt = 0;
+
+        init_MUTEX_LOCKED(&(mlc->csem));
+
+	hil_mlc_clear_di_scratch(mlc);
+	hil_mlc_clear_di_map(mlc, 0);
+	for (i = 0; i < HIL_MLC_DEVMEM; i++) {
+		struct serio *mlc_serio;
+		hil_mlc_copy_di_scratch(mlc, 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->write		= hil_mlc_serio_write;
+		mlc_serio->open			= hil_mlc_serio_open;
+		mlc_serio->close		= hil_mlc_serio_close;
+		mlc_serio->port_data		= &(mlc->serio_map[i]);
+		mlc->serio_map[i].mlc		= mlc;
+		mlc->serio_map[i].didx		= i;
+		mlc->serio_map[i].di_revmap	= -1;
+		mlc->serio_opacket[i]		= 0;
+		mlc->serio_oidx[i]		= 0;
+		serio_register_port(mlc_serio);
+	}
+
+	mlc->tasklet = &hil_mlcs_tasklet;
+
+	write_lock_irqsave(&hil_mlcs_lock, flags);
+	list_add_tail(&mlc->list, &hil_mlcs);
+	mlc->seidx = HILSEN_START;
+	write_unlock_irqrestore(&hil_mlcs_lock, flags);
+
+	tasklet_schedule(&hil_mlcs_tasklet);
+	return 0;
+}
+
+int hil_mlc_unregister(hil_mlc *mlc) {
+	struct list_head *tmp;
+        unsigned long flags;
+	int i;
+
+	if (mlc == NULL)
+		return -EINVAL;
+
+	write_lock_irqsave(&hil_mlcs_lock, flags);
+	list_for_each(tmp, &hil_mlcs) {
+		if (list_entry(tmp, hil_mlc, list) == mlc)
+			goto found;
+	}
+
+	/* not found in list */
+	write_unlock_irqrestore(&hil_mlcs_lock, flags);
+	tasklet_schedule(&hil_mlcs_tasklet);
+	return -ENODEV;
+
+ found:
+	list_del(tmp);
+        write_unlock_irqrestore(&hil_mlcs_lock, flags);
+
+	for (i = 0; i < HIL_MLC_DEVMEM; i++) {
+		serio_unregister_port(mlc->serio[i]);
+		mlc->serio[i] = NULL;
+	}
+
+	tasklet_schedule(&hil_mlcs_tasklet);
+	return 0;
+}
+
+/**************************** Module interface *************************/
+
+static int __init hil_mlc_init(void)
+{
+	init_timer(&hil_mlcs_kicker);
+	hil_mlcs_kicker.expires = jiffies + HZ;
+	hil_mlcs_kicker.function = &hil_mlcs_timer;
+	add_timer(&hil_mlcs_kicker);
+
+	tasklet_enable(&hil_mlcs_tasklet);
+
+	return 0;
+}
+                
+static void __exit hil_mlc_exit(void)
+{
+	del_timer(&hil_mlcs_kicker);
+
+	tasklet_disable(&hil_mlcs_tasklet);
+	tasklet_kill(&hil_mlcs_tasklet);
+}
+                        
+module_init(hil_mlc_init);
+module_exit(hil_mlc_exit);