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, 358 insertions, 0 deletions

diff --git a/drivers/input/serio/hp_sdc_mlc.c b/drivers/input/serio/hp_sdc_mlc.c
new file mode 100644
index 000000000000..e3c44ffae674
--- /dev/null
+++ b/drivers/input/serio/hp_sdc_mlc.c
@@ -0,0 +1,358 @@
+/*
+ * Access to HP-HIL MLC through HP System Device Controller.
+ *
+ * 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
+ *
+ */
+
+#include <linux/hil_mlc.h>
+#include <linux/hp_sdc.h>
+#include <linux/errno.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/string.h>
+
+#define PREFIX "HP SDC MLC: "
+
+static hil_mlc hp_sdc_mlc;
+
+MODULE_AUTHOR("Brian S. Julin <bri@calyx.com>");
+MODULE_DESCRIPTION("Glue for onboard HIL MLC in HP-PARISC machines");
+MODULE_LICENSE("Dual BSD/GPL");
+
+struct hp_sdc_mlc_priv_s {
+        int emtestmode;
+        hp_sdc_transaction trans;
+        u8 tseq[16];
+        int got5x;
+} hp_sdc_mlc_priv;
+
+/************************* Interrupt context ******************************/
+static void hp_sdc_mlc_isr (int irq, void *dev_id, 
+                            uint8_t status, uint8_t data) {
+        int idx;
+        hil_mlc *mlc = &hp_sdc_mlc;
+
+        write_lock(&(mlc->lock));
+        if (mlc->icount < 0) {
+                printk(KERN_WARNING PREFIX "HIL Overflow!\n");
+                up(&mlc->isem);
+                goto out;
+        }
+        idx = 15 - mlc->icount;
+        if ((status & HP_SDC_STATUS_IRQMASK) == HP_SDC_STATUS_HILDATA) {
+                mlc->ipacket[idx] |= data | HIL_ERR_INT;
+                mlc->icount--;
+                if (hp_sdc_mlc_priv.got5x) goto check;
+                if (!idx) goto check;
+                if ((mlc->ipacket[idx-1] & HIL_PKT_ADDR_MASK) !=
+                    (mlc->ipacket[idx] & HIL_PKT_ADDR_MASK)) {
+                        mlc->ipacket[idx] &= ~HIL_PKT_ADDR_MASK;
+                        mlc->ipacket[idx] |= (mlc->ipacket[idx-1] 
+                                                    & HIL_PKT_ADDR_MASK);
+                }
+                goto check;
+        }
+        /* We know status is 5X */
+        if (data & HP_SDC_HIL_ISERR) goto err;
+        mlc->ipacket[idx] = 
+                (data & HP_SDC_HIL_R1MASK) << HIL_PKT_ADDR_SHIFT;
+        hp_sdc_mlc_priv.got5x = 1;
+        goto out;
+
+ check:
+        hp_sdc_mlc_priv.got5x = 0;
+        if (mlc->imatch == 0) goto done;
+        if ((mlc->imatch == (HIL_ERR_INT | HIL_PKT_CMD | HIL_CMD_POL)) 
+            && (mlc->ipacket[idx] == (mlc->imatch | idx))) goto done;
+        if (mlc->ipacket[idx] == mlc->imatch) goto done;
+        goto out;
+
+ err:                           
+        printk(KERN_DEBUG PREFIX "err code %x\n", data);
+        switch (data) {
+        case HP_SDC_HIL_RC_DONE:
+                printk(KERN_WARNING PREFIX "Bastard SDC reconfigured loop!\n");
+                break;
+        case HP_SDC_HIL_ERR:
+                mlc->ipacket[idx] |= HIL_ERR_INT | HIL_ERR_PERR | 
+                  HIL_ERR_FERR | HIL_ERR_FOF;
+                break;
+        case HP_SDC_HIL_TO:
+                mlc->ipacket[idx] |= HIL_ERR_INT | HIL_ERR_LERR;
+                break;
+        case HP_SDC_HIL_RC:
+                printk(KERN_WARNING PREFIX "Bastard SDC decided to reconfigure loop!\n");
+                break;
+        default:
+                printk(KERN_WARNING PREFIX "Unkown HIL Error status (%x)!\n", data);
+                break;
+        }
+        /* No more data will be coming due to an error. */
+ done:
+        tasklet_schedule(mlc->tasklet);
+        up(&(mlc->isem));
+ out:
+        write_unlock(&(mlc->lock));
+}
+
+
+/******************** Tasklet or userspace context functions ****************/
+
+static int hp_sdc_mlc_in (hil_mlc *mlc, suseconds_t timeout) {
+        unsigned long flags;
+        struct hp_sdc_mlc_priv_s *priv;
+        int rc = 2;
+
+        priv = mlc->priv;
+
+        write_lock_irqsave(&(mlc->lock), flags);
+
+        /* Try to down the semaphore */
+        if (down_trylock(&(mlc->isem))) {
+                struct timeval tv;
+                if (priv->emtestmode) {
+                        mlc->ipacket[0] = 
+                                HIL_ERR_INT | (mlc->opacket & 
+                                               (HIL_PKT_CMD | 
+                                                HIL_PKT_ADDR_MASK | 
+                                                HIL_PKT_DATA_MASK));
+                        mlc->icount = 14;
+                        /* printk(KERN_DEBUG PREFIX ">[%x]\n", mlc->ipacket[0]); */
+                        goto wasup;
+                }
+                do_gettimeofday(&tv);
+                tv.tv_usec += 1000000 * (tv.tv_sec - mlc->instart.tv_sec);
+                if (tv.tv_usec - mlc->instart.tv_usec > mlc->intimeout) {
+                  /*              printk("!%i %i", 
+                                  tv.tv_usec - mlc->instart.tv_usec, 
+                                  mlc->intimeout);
+                  */
+                        rc = 1;
+                        up(&(mlc->isem));
+                }
+                goto done;
+        }
+ wasup:
+        up(&(mlc->isem));
+        rc = 0;
+        goto done;
+ done:
+        write_unlock_irqrestore(&(mlc->lock), flags);
+        return rc;
+}
+
+static int hp_sdc_mlc_cts (hil_mlc *mlc) {
+        struct hp_sdc_mlc_priv_s *priv;
+        unsigned long flags;
+
+        priv = mlc->priv;       
+
+        write_lock_irqsave(&(mlc->lock), flags);
+
+        /* Try to down the semaphores -- they should be up. */
+        if (down_trylock(&(mlc->isem))) {
+                BUG();
+                goto busy;
+        }
+        if (down_trylock(&(mlc->osem))) {
+                BUG();
+                up(&(mlc->isem));
+                goto busy;
+        }
+        up(&(mlc->isem));
+        up(&(mlc->osem));
+
+        if (down_trylock(&(mlc->csem))) {
+                if (priv->trans.act.semaphore != &(mlc->csem)) goto poll;
+                goto busy;
+        }
+        if (!(priv->tseq[4] & HP_SDC_USE_LOOP)) goto done;
+
+ poll:
+        priv->trans.act.semaphore = &(mlc->csem);
+        priv->trans.actidx = 0;
+        priv->trans.idx = 1;
+        priv->trans.endidx = 5;
+        priv->tseq[0] = 
+                HP_SDC_ACT_POSTCMD | HP_SDC_ACT_DATAIN | HP_SDC_ACT_SEMAPHORE;
+        priv->tseq[1] = HP_SDC_CMD_READ_USE;
+        priv->tseq[2] = 1;
+        priv->tseq[3] = 0;
+        priv->tseq[4] = 0;
+        hp_sdc_enqueue_transaction(&(priv->trans));
+ busy:
+        write_unlock_irqrestore(&(mlc->lock), flags);
+        return 1;
+ done:
+        priv->trans.act.semaphore = &(mlc->osem);
+        up(&(mlc->csem));
+        write_unlock_irqrestore(&(mlc->lock), flags);
+        return 0;
+}
+
+static void hp_sdc_mlc_out (hil_mlc *mlc) {
+        struct hp_sdc_mlc_priv_s *priv;
+        unsigned long flags;
+
+        priv = mlc->priv;
+
+        write_lock_irqsave(&(mlc->lock), flags);
+        
+        /* Try to down the semaphore -- it should be up. */
+        if (down_trylock(&(mlc->osem))) {
+                BUG();
+                goto done;
+        }
+
+        if (mlc->opacket & HIL_DO_ALTER_CTRL) goto do_control;
+
+ do_data:
+        if (priv->emtestmode) {
+                up(&(mlc->osem));
+                goto done;
+        }
+        /* Shouldn't be sending commands when loop may be busy */
+        if (down_trylock(&(mlc->csem))) {
+                BUG();
+                goto done;
+        }
+        up(&(mlc->csem));
+
+        priv->trans.actidx = 0;
+        priv->trans.idx = 1;
+        priv->trans.act.semaphore = &(mlc->osem);
+        priv->trans.endidx = 6;
+        priv->tseq[0] = 
+                HP_SDC_ACT_DATAREG | HP_SDC_ACT_POSTCMD | HP_SDC_ACT_SEMAPHORE;
+        priv->tseq[1] = 0x7;
+        priv->tseq[2] = 
+                (mlc->opacket & 
+                 (HIL_PKT_ADDR_MASK | HIL_PKT_CMD))
+                   >> HIL_PKT_ADDR_SHIFT;
+        priv->tseq[3] = 
+                (mlc->opacket & HIL_PKT_DATA_MASK) 
+                  >> HIL_PKT_DATA_SHIFT;
+        priv->tseq[4] = 0;  /* No timeout */
+        if (priv->tseq[3] == HIL_CMD_DHR) priv->tseq[4] = 1;
+        priv->tseq[5] = HP_SDC_CMD_DO_HIL;
+        goto enqueue;
+
+ do_control:
+        priv->emtestmode = mlc->opacket & HIL_CTRL_TEST;
+        if ((mlc->opacket & (HIL_CTRL_APE | HIL_CTRL_IPF)) == HIL_CTRL_APE) {
+                BUG(); /* we cannot emulate this, it should not be used. */
+        }
+        if ((mlc->opacket & HIL_CTRL_ONLY) == HIL_CTRL_ONLY) goto control_only;
+        if (mlc->opacket & HIL_CTRL_APE) { 
+                BUG(); /* Should not send command/data after engaging APE */
+                goto done;
+        }
+        /* Disengaging APE this way would not be valid either since 
+         * the loop must be allowed to idle.
+         *
+         * So, it works out that we really never actually send control 
+         * and data when using SDC, we just send the data. 
+         */
+        goto do_data;
+
+ control_only:
+        priv->trans.actidx = 0;
+        priv->trans.idx = 1;
+        priv->trans.act.semaphore = &(mlc->osem);
+        priv->trans.endidx = 4;
+        priv->tseq[0] = 
+          HP_SDC_ACT_PRECMD | HP_SDC_ACT_DATAOUT | HP_SDC_ACT_SEMAPHORE;
+        priv->tseq[1] = HP_SDC_CMD_SET_LPC;
+        priv->tseq[2] = 1;
+        //      priv->tseq[3] = (mlc->ddc + 1) | HP_SDC_LPS_ACSUCC;
+        priv->tseq[3] = 0;
+        if (mlc->opacket & HIL_CTRL_APE) {
+                priv->tseq[3] |= HP_SDC_LPC_APE_IPF;
+                down_trylock(&(mlc->csem));
+        } 
+ enqueue:
+        hp_sdc_enqueue_transaction(&(priv->trans));
+ done:
+        write_unlock_irqrestore(&(mlc->lock), flags);
+}
+
+static int __init hp_sdc_mlc_init(void)
+{
+        hil_mlc *mlc = &hp_sdc_mlc;
+
+        printk(KERN_INFO PREFIX "Registering the System Domain Controller's HIL MLC.\n");
+
+        hp_sdc_mlc_priv.emtestmode = 0;
+        hp_sdc_mlc_priv.trans.seq = hp_sdc_mlc_priv.tseq;
+        hp_sdc_mlc_priv.trans.act.semaphore = &(mlc->osem);
+        hp_sdc_mlc_priv.got5x = 0;
+
+        mlc->cts                = &hp_sdc_mlc_cts;
+        mlc->in                 = &hp_sdc_mlc_in;
+        mlc->out                = &hp_sdc_mlc_out;
+
+        if (hil_mlc_register(mlc)) {
+                printk(KERN_WARNING PREFIX "Failed to register MLC structure with hil_mlc\n");
+                goto err0;
+        }
+        mlc->priv               = &hp_sdc_mlc_priv;
+
+        if (hp_sdc_request_hil_irq(&hp_sdc_mlc_isr)) {
+                printk(KERN_WARNING PREFIX "Request for raw HIL ISR hook denied\n");
+                goto err1;
+        }
+        return 0;
+ err1:
+        if (hil_mlc_unregister(mlc)) {
+                printk(KERN_ERR PREFIX "Failed to unregister MLC structure with hil_mlc.\n"
+                        "This is bad.  Could cause an oops.\n");
+        }
+ err0:
+        return -EBUSY;
+}
+
+static void __exit hp_sdc_mlc_exit(void)
+{
+        hil_mlc *mlc = &hp_sdc_mlc;
+        if (hp_sdc_release_hil_irq(&hp_sdc_mlc_isr)) {
+                printk(KERN_ERR PREFIX "Failed to release the raw HIL ISR hook.\n"
+                        "This is bad.  Could cause an oops.\n");
+        }
+        if (hil_mlc_unregister(mlc)) {
+                printk(KERN_ERR PREFIX "Failed to unregister MLC structure with hil_mlc.\n"
+                        "This is bad.  Could cause an oops.\n");
+        }
+}
+
+module_init(hp_sdc_mlc_init);
+module_exit(hp_sdc_mlc_exit);