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, 724 insertions, 0 deletions

diff --git a/drivers/input/misc/hp_sdc_rtc.c b/drivers/input/misc/hp_sdc_rtc.c
new file mode 100644
index 000000000000..1cd7657f7e42
--- /dev/null
+++ b/drivers/input/misc/hp_sdc_rtc.c
@@ -0,0 +1,724 @@
+/*
+ * HP i8042 SDC + MSM-58321 BBRTC 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:
+ * System Device Controller Microprocessor Firmware Theory of Operation
+ *      for Part Number 1820-4784 Revision B.  Dwg No. A-1820-4784-2
+ * efirtc.c by Stephane Eranian/Hewlett Packard
+ *
+ */
+
+#include <linux/hp_sdc.h>
+#include <linux/errno.h>
+#include <linux/types.h>
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/time.h>
+#include <linux/miscdevice.h>
+#include <linux/proc_fs.h>
+#include <linux/poll.h>
+#include <linux/rtc.h>
+
+MODULE_AUTHOR("Brian S. Julin <bri@calyx.com>");
+MODULE_DESCRIPTION("HP i8042 SDC + MSM-58321 RTC Driver");
+MODULE_LICENSE("Dual BSD/GPL");
+
+#define RTC_VERSION "1.10d"
+
+static unsigned long epoch = 2000;
+
+static struct semaphore i8042tregs;
+
+static hp_sdc_irqhook hp_sdc_rtc_isr;
+
+static struct fasync_struct *hp_sdc_rtc_async_queue;
+
+static DECLARE_WAIT_QUEUE_HEAD(hp_sdc_rtc_wait);
+
+static loff_t hp_sdc_rtc_llseek(struct file *file, loff_t offset, int origin);
+
+static ssize_t hp_sdc_rtc_read(struct file *file, char *buf,
+                               size_t count, loff_t *ppos);
+
+static int hp_sdc_rtc_ioctl(struct inode *inode, struct file *file,
+                            unsigned int cmd, unsigned long arg);
+
+static unsigned int hp_sdc_rtc_poll(struct file *file, poll_table *wait);
+
+static int hp_sdc_rtc_open(struct inode *inode, struct file *file);
+static int hp_sdc_rtc_release(struct inode *inode, struct file *file);
+static int hp_sdc_rtc_fasync (int fd, struct file *filp, int on);
+
+static int hp_sdc_rtc_read_proc(char *page, char **start, off_t off,
+                                int count, int *eof, void *data);
+
+static void hp_sdc_rtc_isr (int irq, void *dev_id, 
+                            uint8_t status, uint8_t data) 
+{
+        return;
+}
+
+static int hp_sdc_rtc_do_read_bbrtc (struct rtc_time *rtctm)
+{
+        struct semaphore tsem;
+        hp_sdc_transaction t;
+        uint8_t tseq[91];
+        int i;
+        
+        i = 0;
+        while (i < 91) {
+                tseq[i++] = HP_SDC_ACT_DATAREG |
+                        HP_SDC_ACT_POSTCMD | HP_SDC_ACT_DATAIN;
+                tseq[i++] = 0x01;                       /* write i8042[0x70] */
+                tseq[i]   = i / 7;                      /* BBRTC reg address */
+                i++;
+                tseq[i++] = HP_SDC_CMD_DO_RTCR;         /* Trigger command   */
+                tseq[i++] = 2;          /* expect 1 stat/dat pair back.   */
+                i++; i++;               /* buffer for stat/dat pair       */
+        }
+        tseq[84] |= HP_SDC_ACT_SEMAPHORE;
+        t.endidx =              91;
+        t.seq =                 tseq;
+        t.act.semaphore =       &tsem;
+        init_MUTEX_LOCKED(&tsem);
+        
+        if (hp_sdc_enqueue_transaction(&t)) return -1;
+        
+        down_interruptible(&tsem);  /* Put ourselves to sleep for results. */
+        
+        /* Check for nonpresence of BBRTC */
+        if (!((tseq[83] | tseq[90] | tseq[69] | tseq[76] |
+               tseq[55] | tseq[62] | tseq[34] | tseq[41] |
+               tseq[20] | tseq[27] | tseq[6]  | tseq[13]) & 0x0f))
+                return -1;
+
+        memset(rtctm, 0, sizeof(struct rtc_time));
+        rtctm->tm_year = (tseq[83] & 0x0f) + (tseq[90] & 0x0f) * 10;
+        rtctm->tm_mon  = (tseq[69] & 0x0f) + (tseq[76] & 0x0f) * 10;
+        rtctm->tm_mday = (tseq[55] & 0x0f) + (tseq[62] & 0x0f) * 10;
+        rtctm->tm_wday = (tseq[48] & 0x0f);
+        rtctm->tm_hour = (tseq[34] & 0x0f) + (tseq[41] & 0x0f) * 10;
+        rtctm->tm_min  = (tseq[20] & 0x0f) + (tseq[27] & 0x0f) * 10;
+        rtctm->tm_sec  = (tseq[6]  & 0x0f) + (tseq[13] & 0x0f) * 10;
+        
+        return 0;
+}
+
+static int hp_sdc_rtc_read_bbrtc (struct rtc_time *rtctm)
+{
+        struct rtc_time tm, tm_last;
+        int i = 0;
+
+        /* MSM-58321 has no read latch, so must read twice and compare. */
+
+        if (hp_sdc_rtc_do_read_bbrtc(&tm_last)) return -1;
+        if (hp_sdc_rtc_do_read_bbrtc(&tm)) return -1;
+
+        while (memcmp(&tm, &tm_last, sizeof(struct rtc_time))) {
+                if (i++ > 4) return -1;
+                memcpy(&tm_last, &tm, sizeof(struct rtc_time));
+                if (hp_sdc_rtc_do_read_bbrtc(&tm)) return -1;
+        }
+
+        memcpy(rtctm, &tm, sizeof(struct rtc_time));
+
+        return 0;
+}
+
+
+static int64_t hp_sdc_rtc_read_i8042timer (uint8_t loadcmd, int numreg)
+{
+        hp_sdc_transaction t;
+        uint8_t tseq[26] = {
+                HP_SDC_ACT_PRECMD | HP_SDC_ACT_POSTCMD | HP_SDC_ACT_DATAIN,
+                0,
+                HP_SDC_CMD_READ_T1, 2, 0, 0,
+                HP_SDC_ACT_POSTCMD | HP_SDC_ACT_DATAIN, 
+                HP_SDC_CMD_READ_T2, 2, 0, 0,
+                HP_SDC_ACT_POSTCMD | HP_SDC_ACT_DATAIN, 
+                HP_SDC_CMD_READ_T3, 2, 0, 0,
+                HP_SDC_ACT_POSTCMD | HP_SDC_ACT_DATAIN, 
+                HP_SDC_CMD_READ_T4, 2, 0, 0,
+                HP_SDC_ACT_POSTCMD | HP_SDC_ACT_DATAIN, 
+                HP_SDC_CMD_READ_T5, 2, 0, 0
+        };
+
+        t.endidx = numreg * 5;
+
+        tseq[1] = loadcmd;
+        tseq[t.endidx - 4] |= HP_SDC_ACT_SEMAPHORE; /* numreg assumed > 1 */
+
+        t.seq =                 tseq;
+        t.act.semaphore =       &i8042tregs;
+
+        down_interruptible(&i8042tregs);  /* Sleep if output regs in use. */
+
+        if (hp_sdc_enqueue_transaction(&t)) return -1;
+        
+        down_interruptible(&i8042tregs);  /* Sleep until results come back. */
+        up(&i8042tregs);
+
+        return (tseq[5] | 
+                ((uint64_t)(tseq[10]) << 8)  | ((uint64_t)(tseq[15]) << 16) |
+                ((uint64_t)(tseq[20]) << 24) | ((uint64_t)(tseq[25]) << 32));
+}
+
+
+/* Read the i8042 real-time clock */
+static inline int hp_sdc_rtc_read_rt(struct timeval *res) {
+        int64_t raw;
+        uint32_t tenms; 
+        unsigned int days;
+
+        raw = hp_sdc_rtc_read_i8042timer(HP_SDC_CMD_LOAD_RT, 5);
+        if (raw < 0) return -1;
+
+        tenms = (uint32_t)raw & 0xffffff;
+        days  = (unsigned int)(raw >> 24) & 0xffff;
+
+        res->tv_usec = (suseconds_t)(tenms % 100) * 10000;
+        res->tv_sec =  (time_t)(tenms / 100) + days * 86400;
+
+        return 0;
+}
+
+
+/* Read the i8042 fast handshake timer */
+static inline int hp_sdc_rtc_read_fhs(struct timeval *res) {
+        uint64_t raw;
+        unsigned int tenms;
+
+        raw = hp_sdc_rtc_read_i8042timer(HP_SDC_CMD_LOAD_FHS, 2);
+        if (raw < 0) return -1;
+
+        tenms = (unsigned int)raw & 0xffff;
+
+        res->tv_usec = (suseconds_t)(tenms % 100) * 10000;
+        res->tv_sec  = (time_t)(tenms / 100);
+
+        return 0;
+}
+
+
+/* Read the i8042 match timer (a.k.a. alarm) */
+static inline int hp_sdc_rtc_read_mt(struct timeval *res) {
+        int64_t raw;    
+        uint32_t tenms; 
+
+        raw = hp_sdc_rtc_read_i8042timer(HP_SDC_CMD_LOAD_MT, 3);
+        if (raw < 0) return -1;
+
+        tenms = (uint32_t)raw & 0xffffff;
+
+        res->tv_usec = (suseconds_t)(tenms % 100) * 10000;
+        res->tv_sec  = (time_t)(tenms / 100);
+
+        return 0;
+}
+
+
+/* Read the i8042 delay timer */
+static inline int hp_sdc_rtc_read_dt(struct timeval *res) {
+        int64_t raw;
+        uint32_t tenms;
+
+        raw = hp_sdc_rtc_read_i8042timer(HP_SDC_CMD_LOAD_DT, 3);
+        if (raw < 0) return -1;
+
+        tenms = (uint32_t)raw & 0xffffff;
+
+        res->tv_usec = (suseconds_t)(tenms % 100) * 10000;
+        res->tv_sec  = (time_t)(tenms / 100);
+
+        return 0;
+}
+
+
+/* Read the i8042 cycle timer (a.k.a. periodic) */
+static inline int hp_sdc_rtc_read_ct(struct timeval *res) {
+        int64_t raw;
+        uint32_t tenms;
+
+        raw = hp_sdc_rtc_read_i8042timer(HP_SDC_CMD_LOAD_CT, 3);
+        if (raw < 0) return -1;
+
+        tenms = (uint32_t)raw & 0xffffff;
+
+        res->tv_usec = (suseconds_t)(tenms % 100) * 10000;
+        res->tv_sec  = (time_t)(tenms / 100);
+
+        return 0;
+}
+
+
+/* Set the i8042 real-time clock */
+static int hp_sdc_rtc_set_rt (struct timeval *setto)
+{
+        uint32_t tenms;
+        unsigned int days;
+        hp_sdc_transaction t;
+        uint8_t tseq[11] = {
+                HP_SDC_ACT_PRECMD | HP_SDC_ACT_DATAOUT,
+                HP_SDC_CMD_SET_RTMS, 3, 0, 0, 0,
+                HP_SDC_ACT_PRECMD | HP_SDC_ACT_DATAOUT,
+                HP_SDC_CMD_SET_RTD, 2, 0, 0 
+        };
+
+        t.endidx = 10;
+
+        if (0xffff < setto->tv_sec / 86400) return -1;
+        days = setto->tv_sec / 86400;
+        if (0xffff < setto->tv_usec / 1000000 / 86400) return -1;
+        days += ((setto->tv_sec % 86400) + setto->tv_usec / 1000000) / 86400;
+        if (days > 0xffff) return -1;
+
+        if (0xffffff < setto->tv_sec) return -1;
+        tenms  = setto->tv_sec * 100;
+        if (0xffffff < setto->tv_usec / 10000) return -1;
+        tenms += setto->tv_usec / 10000;
+        if (tenms > 0xffffff) return -1;
+
+        tseq[3] = (uint8_t)(tenms & 0xff);
+        tseq[4] = (uint8_t)((tenms >> 8)  & 0xff);
+        tseq[5] = (uint8_t)((tenms >> 16) & 0xff);
+
+        tseq[9] = (uint8_t)(days & 0xff);
+        tseq[10] = (uint8_t)((days >> 8) & 0xff);
+
+        t.seq = tseq;
+
+        if (hp_sdc_enqueue_transaction(&t)) return -1;
+        return 0;
+}
+
+/* Set the i8042 fast handshake timer */
+static int hp_sdc_rtc_set_fhs (struct timeval *setto)
+{
+        uint32_t tenms;
+        hp_sdc_transaction t;
+        uint8_t tseq[5] = {
+                HP_SDC_ACT_PRECMD | HP_SDC_ACT_DATAOUT,
+                HP_SDC_CMD_SET_FHS, 2, 0, 0
+        };
+
+        t.endidx = 4;
+
+        if (0xffff < setto->tv_sec) return -1;
+        tenms  = setto->tv_sec * 100;
+        if (0xffff < setto->tv_usec / 10000) return -1;
+        tenms += setto->tv_usec / 10000;
+        if (tenms > 0xffff) return -1;
+
+        tseq[3] = (uint8_t)(tenms & 0xff);
+        tseq[4] = (uint8_t)((tenms >> 8)  & 0xff);
+
+        t.seq = tseq;
+
+        if (hp_sdc_enqueue_transaction(&t)) return -1;
+        return 0;
+}
+
+
+/* Set the i8042 match timer (a.k.a. alarm) */
+#define hp_sdc_rtc_set_mt (setto) \
+        hp_sdc_rtc_set_i8042timer(setto, HP_SDC_CMD_SET_MT)
+
+/* Set the i8042 delay timer */
+#define hp_sdc_rtc_set_dt (setto) \
+        hp_sdc_rtc_set_i8042timer(setto, HP_SDC_CMD_SET_DT)
+
+/* Set the i8042 cycle timer (a.k.a. periodic) */
+#define hp_sdc_rtc_set_ct (setto) \
+        hp_sdc_rtc_set_i8042timer(setto, HP_SDC_CMD_SET_CT)
+
+/* Set one of the i8042 3-byte wide timers */
+static int hp_sdc_rtc_set_i8042timer (struct timeval *setto, uint8_t setcmd)
+{
+        uint32_t tenms;
+        hp_sdc_transaction t;
+        uint8_t tseq[6] = {
+                HP_SDC_ACT_PRECMD | HP_SDC_ACT_DATAOUT,
+                0, 3, 0, 0, 0
+        };
+
+        t.endidx = 6;
+
+        if (0xffffff < setto->tv_sec) return -1;
+        tenms  = setto->tv_sec * 100;
+        if (0xffffff < setto->tv_usec / 10000) return -1;
+        tenms += setto->tv_usec / 10000;
+        if (tenms > 0xffffff) return -1;
+
+        tseq[1] = setcmd;
+        tseq[3] = (uint8_t)(tenms & 0xff);
+        tseq[4] = (uint8_t)((tenms >> 8)  & 0xff);
+        tseq[5] = (uint8_t)((tenms >> 16)  & 0xff);
+
+        t.seq =                 tseq;
+
+        if (hp_sdc_enqueue_transaction(&t)) { 
+                return -1;
+        }
+        return 0;
+}
+
+static loff_t hp_sdc_rtc_llseek(struct file *file, loff_t offset, int origin)
+{
+        return -ESPIPE;
+}
+
+static ssize_t hp_sdc_rtc_read(struct file *file, char *buf,
+                               size_t count, loff_t *ppos) {
+        ssize_t retval;
+
+        if (count < sizeof(unsigned long))
+                return -EINVAL;
+
+        retval = put_user(68, (unsigned long *)buf);
+        return retval;
+}
+
+static unsigned int hp_sdc_rtc_poll(struct file *file, poll_table *wait)
+{
+        unsigned long l;
+
+        l = 0;
+        if (l != 0)
+                return POLLIN | POLLRDNORM;
+        return 0;
+}
+
+static int hp_sdc_rtc_open(struct inode *inode, struct file *file)
+{
+        return 0;
+}
+
+static int hp_sdc_rtc_release(struct inode *inode, struct file *file)
+{
+        /* Turn off interrupts? */
+
+        if (file->f_flags & FASYNC) {
+                hp_sdc_rtc_fasync (-1, file, 0);
+        }
+
+        return 0;
+}
+
+static int hp_sdc_rtc_fasync (int fd, struct file *filp, int on)
+{
+        return fasync_helper (fd, filp, on, &hp_sdc_rtc_async_queue);
+}
+
+static int hp_sdc_rtc_proc_output (char *buf)
+{
+#define YN(bit) ("no")
+#define NY(bit) ("yes")
+        char *p;
+        struct rtc_time tm;
+        struct timeval tv;
+
+        memset(&tm, 0, sizeof(struct rtc_time));
+
+        p = buf;
+
+        if (hp_sdc_rtc_read_bbrtc(&tm)) {
+                p += sprintf(p, "BBRTC\t\t: READ FAILED!\n");
+        } else {
+                p += sprintf(p,
+                             "rtc_time\t: %02d:%02d:%02d\n"
+                             "rtc_date\t: %04d-%02d-%02d\n"
+                             "rtc_epoch\t: %04lu\n",
+                             tm.tm_hour, tm.tm_min, tm.tm_sec,
+                             tm.tm_year + 1900, tm.tm_mon + 1, 
+                             tm.tm_mday, epoch);
+        }
+
+        if (hp_sdc_rtc_read_rt(&tv)) {
+                p += sprintf(p, "i8042 rtc\t: READ FAILED!\n");
+        } else {
+                p += sprintf(p, "i8042 rtc\t: %ld.%02d seconds\n", 
+                             tv.tv_sec, tv.tv_usec/1000);
+        }
+
+        if (hp_sdc_rtc_read_fhs(&tv)) {
+                p += sprintf(p, "handshake\t: READ FAILED!\n");
+        } else {
+                p += sprintf(p, "handshake\t: %ld.%02d seconds\n", 
+                             tv.tv_sec, tv.tv_usec/1000);
+        }
+
+        if (hp_sdc_rtc_read_mt(&tv)) {
+                p += sprintf(p, "alarm\t\t: READ FAILED!\n");
+        } else {
+                p += sprintf(p, "alarm\t\t: %ld.%02d seconds\n", 
+                             tv.tv_sec, tv.tv_usec/1000);
+        }
+
+        if (hp_sdc_rtc_read_dt(&tv)) {
+                p += sprintf(p, "delay\t\t: READ FAILED!\n");
+        } else {
+                p += sprintf(p, "delay\t\t: %ld.%02d seconds\n", 
+                             tv.tv_sec, tv.tv_usec/1000);
+        }
+
+        if (hp_sdc_rtc_read_ct(&tv)) {
+                p += sprintf(p, "periodic\t: READ FAILED!\n");
+        } else {
+                p += sprintf(p, "periodic\t: %ld.%02d seconds\n", 
+                             tv.tv_sec, tv.tv_usec/1000);
+        }
+
+        p += sprintf(p,
+                     "DST_enable\t: %s\n"
+                     "BCD\t\t: %s\n"
+                     "24hr\t\t: %s\n"
+                     "square_wave\t: %s\n"
+                     "alarm_IRQ\t: %s\n"
+                     "update_IRQ\t: %s\n"
+                     "periodic_IRQ\t: %s\n"
+                     "periodic_freq\t: %ld\n"
+                     "batt_status\t: %s\n",
+                     YN(RTC_DST_EN),
+                     NY(RTC_DM_BINARY),
+                     YN(RTC_24H),
+                     YN(RTC_SQWE),
+                     YN(RTC_AIE),
+                     YN(RTC_UIE),
+                     YN(RTC_PIE),
+                     1UL,
+                     1 ? "okay" : "dead");
+
+        return  p - buf;
+#undef YN
+#undef NY
+}
+
+static int hp_sdc_rtc_read_proc(char *page, char **start, off_t off,
+                         int count, int *eof, void *data)
+{
+        int len = hp_sdc_rtc_proc_output (page);
+        if (len <= off+count) *eof = 1;
+        *start = page + off;
+        len -= off;
+        if (len>count) len = count;
+        if (len<0) len = 0;
+        return len;
+}
+
+static int hp_sdc_rtc_ioctl(struct inode *inode, struct file *file, 
+                            unsigned int cmd, unsigned long arg)
+{
+#if 1
+        return -EINVAL;
+#else
+        
+        struct rtc_time wtime; 
+        struct timeval ttime;
+        int use_wtime = 0;
+
+        /* This needs major work. */
+
+        switch (cmd) {
+
+        case RTC_AIE_OFF:       /* Mask alarm int. enab. bit    */
+        case RTC_AIE_ON:        /* Allow alarm interrupts.      */
+        case RTC_PIE_OFF:       /* Mask periodic int. enab. bit */
+        case RTC_PIE_ON:        /* Allow periodic ints          */
+        case RTC_UIE_ON:        /* Allow ints for RTC updates.  */
+        case RTC_UIE_OFF:       /* Allow ints for RTC updates.  */
+        {
+                /* We cannot mask individual user timers and we
+                   cannot tell them apart when they occur, so it 
+                   would be disingenuous to succeed these IOCTLs */
+                return -EINVAL;
+        }
+        case RTC_ALM_READ:      /* Read the present alarm time */
+        {
+                if (hp_sdc_rtc_read_mt(&ttime)) return -EFAULT;
+                if (hp_sdc_rtc_read_bbrtc(&wtime)) return -EFAULT;
+
+                wtime.tm_hour = ttime.tv_sec / 3600;  ttime.tv_sec %= 3600;
+                wtime.tm_min  = ttime.tv_sec / 60;    ttime.tv_sec %= 60;
+                wtime.tm_sec  = ttime.tv_sec;
+                
+                break;
+        }
+        case RTC_IRQP_READ:     /* Read the periodic IRQ rate.  */
+        {
+                return put_user(hp_sdc_rtc_freq, (unsigned long *)arg);
+        }
+        case RTC_IRQP_SET:      /* Set periodic IRQ rate.       */
+        {
+                /* 
+                 * The max we can do is 100Hz.
+                 */
+
+                if ((arg < 1) || (arg > 100)) return -EINVAL;
+                ttime.tv_sec = 0;
+                ttime.tv_usec = 1000000 / arg;
+                if (hp_sdc_rtc_set_ct(&ttime)) return -EFAULT;
+                hp_sdc_rtc_freq = arg;
+                return 0;
+        }
+        case RTC_ALM_SET:       /* Store a time into the alarm */
+        {
+                /*
+                 * This expects a struct hp_sdc_rtc_time. Writing 0xff means
+                 * "don't care" or "match all" for PC timers.  The HP SDC
+                 * does not support that perk, but it could be emulated fairly
+                 * easily.  Only the tm_hour, tm_min and tm_sec are used.
+                 * We could do it with 10ms accuracy with the HP SDC, if the 
+                 * rtc interface left us a way to do that.
+                 */
+                struct hp_sdc_rtc_time alm_tm;
+
+                if (copy_from_user(&alm_tm, (struct hp_sdc_rtc_time*)arg,
+                                   sizeof(struct hp_sdc_rtc_time)))
+                       return -EFAULT;
+
+                if (alm_tm.tm_hour > 23) return -EINVAL;
+                if (alm_tm.tm_min  > 59) return -EINVAL;
+                if (alm_tm.tm_sec  > 59) return -EINVAL;  
+
+                ttime.sec = alm_tm.tm_hour * 3600 + 
+                  alm_tm.tm_min * 60 + alm_tm.tm_sec;
+                ttime.usec = 0;
+                if (hp_sdc_rtc_set_mt(&ttime)) return -EFAULT;
+                return 0;
+        }
+        case RTC_RD_TIME:       /* Read the time/date from RTC  */
+        {
+                if (hp_sdc_rtc_read_bbrtc(&wtime)) return -EFAULT;
+                break;
+        }
+        case RTC_SET_TIME:      /* Set the RTC */
+        {
+                struct rtc_time hp_sdc_rtc_tm;
+                unsigned char mon, day, hrs, min, sec, leap_yr;
+                unsigned int yrs;
+
+                if (!capable(CAP_SYS_TIME))
+                        return -EACCES;
+                if (copy_from_user(&hp_sdc_rtc_tm, (struct rtc_time *)arg,
+                                   sizeof(struct rtc_time)))
+                        return -EFAULT;
+
+                yrs = hp_sdc_rtc_tm.tm_year + 1900;
+                mon = hp_sdc_rtc_tm.tm_mon + 1;   /* tm_mon starts at zero */
+                day = hp_sdc_rtc_tm.tm_mday;
+                hrs = hp_sdc_rtc_tm.tm_hour;
+                min = hp_sdc_rtc_tm.tm_min;
+                sec = hp_sdc_rtc_tm.tm_sec;
+
+                if (yrs < 1970)
+                        return -EINVAL;
+
+                leap_yr = ((!(yrs % 4) && (yrs % 100)) || !(yrs % 400));
+
+                if ((mon > 12) || (day == 0))
+                        return -EINVAL;
+                if (day > (days_in_mo[mon] + ((mon == 2) && leap_yr)))
+                        return -EINVAL;
+                if ((hrs >= 24) || (min >= 60) || (sec >= 60))
+                        return -EINVAL;
+
+                if ((yrs -= eH) > 255)    /* They are unsigned */
+                        return -EINVAL;
+
+
+                return 0;
+        }
+        case RTC_EPOCH_READ:    /* Read the epoch.      */
+        {
+                return put_user (epoch, (unsigned long *)arg);
+        }
+        case RTC_EPOCH_SET:     /* Set the epoch.       */
+        {
+                /* 
+                 * There were no RTC clocks before 1900.
+                 */
+                if (arg < 1900)
+                  return -EINVAL;
+                if (!capable(CAP_SYS_TIME))
+                  return -EACCES;
+                
+                epoch = arg;
+                return 0;
+        }
+        default:
+                return -EINVAL;
+        }
+        return copy_to_user((void *)arg, &wtime, sizeof wtime) ? -EFAULT : 0;
+#endif
+}
+
+static struct file_operations hp_sdc_rtc_fops = {
+        .owner =        THIS_MODULE,
+        .llseek =       hp_sdc_rtc_llseek,
+        .read =         hp_sdc_rtc_read,
+        .poll =         hp_sdc_rtc_poll,
+        .ioctl =        hp_sdc_rtc_ioctl,
+        .open =         hp_sdc_rtc_open,
+        .release =      hp_sdc_rtc_release,
+        .fasync =       hp_sdc_rtc_fasync,
+};
+
+static struct miscdevice hp_sdc_rtc_dev = {
+        .minor =        RTC_MINOR,
+        .name =         "rtc_HIL",
+        .fops =         &hp_sdc_rtc_fops
+};
+
+static int __init hp_sdc_rtc_init(void)
+{
+        int ret;
+
+        init_MUTEX(&i8042tregs);
+
+        if ((ret = hp_sdc_request_timer_irq(&hp_sdc_rtc_isr)))
+                return ret;
+        misc_register(&hp_sdc_rtc_dev);
+        create_proc_read_entry ("driver/rtc", 0, 0, 
+                                hp_sdc_rtc_read_proc, NULL);
+
+        printk(KERN_INFO "HP i8042 SDC + MSM-58321 RTC support loaded "
+                         "(RTC v " RTC_VERSION ")\n");
+
+        return 0;
+}
+
+static void __exit hp_sdc_rtc_exit(void)
+{
+        remove_proc_entry ("driver/rtc", NULL);
+        misc_deregister(&hp_sdc_rtc_dev);
+        hp_sdc_release_timer_irq(hp_sdc_rtc_isr);
+        printk(KERN_INFO "HP i8042 SDC + MSM-58321 RTC support unloaded\n");
+}
+
+module_init(hp_sdc_rtc_init);
+module_exit(hp_sdc_rtc_exit);