[PARISC] Update parisc specific input code from parisc tree

Update drivers to new input layer changes.

Signed-off-by: Helge Deller <deller@parisc-linux.org>
Signed-off-by: Matthew Wilcox <willy@parisc-linux.org>

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 <rhirst@parisc-linux.org>

Signed-off-by: Kyle McMartin <kyle@parisc-linux.org>

1 files changed, 168 insertions, 0 deletions

diff --git a/include/linux/hil_mlc.h b/include/linux/hil_mlc.h
new file mode 100644
index 000000000000..8df29ca48a13
--- /dev/null
+++ b/include/linux/hil_mlc.h
@@ -0,0 +1,168 @@
+/*
+ * 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);