--- /dev/null
+/*
+ * 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/seq_file.h>
+#include <linux/poll.h>
+#include <linux/rtc.h>
+#include <linux/mutex.h>
+#include <linux/semaphore.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 DEFINE_MUTEX(hp_sdc_rtc_mutex);
+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 ssize_t hp_sdc_rtc_read(struct file *file, char __user *buf,
+ size_t count, loff_t *ppos);
+
+static long hp_sdc_rtc_unlocked_ioctl(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_fasync (int fd, struct file *filp, int on);
+
+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;
+ sema_init(&tsem, 0);
+
+ if (hp_sdc_enqueue_transaction(&t)) return -1;
+
+ /* Put ourselves to sleep for results. */
+ if (WARN_ON(down_interruptible(&tsem)))
+ return -1;
+
+ /* 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;
+
+ /* Sleep if output regs in use. */
+ if (WARN_ON(down_interruptible(&i8042tregs)))
+ return -1;
+
+ if (hp_sdc_enqueue_transaction(&t)) {
+ up(&i8042tregs);
+ return -1;
+ }
+
+ /* Sleep until results come back. */
+ if (WARN_ON(down_interruptible(&i8042tregs)))
+ return -1;
+
+ 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) {
+ int64_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;
+}
+
+
+#if 0 /* not used yet */
+/* 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;
+}
+#endif
+
+static ssize_t hp_sdc_rtc_read(struct file *file, char __user *buf,
+ size_t count, loff_t *ppos) {
+ ssize_t retval;
+
+ if (count < sizeof(unsigned long))
+ return -EINVAL;
+
+ retval = put_user(68, (unsigned long __user *)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_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_show(struct seq_file *m, void *v)
+{
+#define YN(bit) ("no")
+#define NY(bit) ("yes")
+ struct rtc_time tm;
+ struct timeval tv;
+
+ memset(&tm, 0, sizeof(struct rtc_time));
+
+ if (hp_sdc_rtc_read_bbrtc(&tm)) {
+ seq_puts(m, "BBRTC\t\t: READ FAILED!\n");
+ } else {
+ seq_printf(m,
+ "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)) {
+ seq_puts(m, "i8042 rtc\t: READ FAILED!\n");
+ } else {
+ seq_printf(m, "i8042 rtc\t: %ld.%02d seconds\n",
+ tv.tv_sec, (int)tv.tv_usec/1000);
+ }
+
+ if (hp_sdc_rtc_read_fhs(&tv)) {
+ seq_puts(m, "handshake\t: READ FAILED!\n");
+ } else {
+ seq_printf(m, "handshake\t: %ld.%02d seconds\n",
+ tv.tv_sec, (int)tv.tv_usec/1000);
+ }
+
+ if (hp_sdc_rtc_read_mt(&tv)) {
+ seq_puts(m, "alarm\t\t: READ FAILED!\n");
+ } else {
+ seq_printf(m, "alarm\t\t: %ld.%02d seconds\n",
+ tv.tv_sec, (int)tv.tv_usec/1000);
+ }
+
+ if (hp_sdc_rtc_read_dt(&tv)) {
+ seq_puts(m, "delay\t\t: READ FAILED!\n");
+ } else {
+ seq_printf(m, "delay\t\t: %ld.%02d seconds\n",
+ tv.tv_sec, (int)tv.tv_usec/1000);
+ }
+
+ if (hp_sdc_rtc_read_ct(&tv)) {
+ seq_puts(m, "periodic\t: READ FAILED!\n");
+ } else {
+ seq_printf(m, "periodic\t: %ld.%02d seconds\n",
+ tv.tv_sec, (int)tv.tv_usec/1000);
+ }
+
+ seq_printf(m,
+ "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 0;
+#undef YN
+#undef NY
+}
+
+static int hp_sdc_rtc_proc_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, hp_sdc_rtc_proc_show, NULL);
+}
+
+static const struct file_operations hp_sdc_rtc_proc_fops = {
+ .open = hp_sdc_rtc_proc_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+
+static int hp_sdc_rtc_ioctl(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 long hp_sdc_rtc_unlocked_ioctl(struct file *file,
+ unsigned int cmd, unsigned long arg)
+{
+ int ret;
+
+ mutex_lock(&hp_sdc_rtc_mutex);
+ ret = hp_sdc_rtc_ioctl(file, cmd, arg);
+ mutex_unlock(&hp_sdc_rtc_mutex);
+
+ return ret;
+}
+
+
+static const struct file_operations hp_sdc_rtc_fops = {
+ .owner = THIS_MODULE,
+ .llseek = no_llseek,
+ .read = hp_sdc_rtc_read,
+ .poll = hp_sdc_rtc_poll,
+ .unlocked_ioctl = hp_sdc_rtc_unlocked_ioctl,
+ .open = hp_sdc_rtc_open,
+ .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;
+
+#ifdef __mc68000__
+ if (!MACH_IS_HP300)
+ return -ENODEV;
+#endif
+
+ sema_init(&i8042tregs, 1);
+
+ if ((ret = hp_sdc_request_timer_irq(&hp_sdc_rtc_isr)))
+ return ret;
+ if (misc_register(&hp_sdc_rtc_dev) != 0)
+ printk(KERN_INFO "Could not register misc. dev for i8042 rtc\n");
+
+ proc_create("driver/rtc", 0, NULL, &hp_sdc_rtc_proc_fops);
+
+ 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);
Code Review / kvmfornfv.git / blobdiff