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 000000000000..c243cb6fdfc4
--- /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);