Input: hp_sdc_rtc - remove dead chardev code
The driver contains half of the implementation of /dev/rtc, but this was never completed, and it is now incompatible with the drivers/rtc framework. Remove the chardev completely. If anyone wants to add the functionality later, that shoudl be done through rtc_register_device(). The remaining portions of the driver basically implement a single procfs file that may or may not be used anywhere. Not sure why this is in drivers/input/ though. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Alexandre Belloni <alexandre.belloni@bootlin.com> Acked-by: Helge Deller <deller@gmx.de> Link: https://lore.kernel.org/r/20191023142521.3643152-1-arnd@arndb.de Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
This commit is contained in:
Arnd Bergmann
Dmitry Torokhov
parent
688f1dfb69
commit
ee1b4b2e7c
1 changed files with 0 additions and 342 deletions
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@ -53,28 +53,10 @@ MODULE_LICENSE("Dual BSD/GPL");
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#define RTC_VERSION "1.10d"
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static DEFINE_MUTEX(hp_sdc_rtc_mutex);
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static unsigned long epoch = 2000;
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static struct semaphore i8042tregs;
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static hp_sdc_irqhook hp_sdc_rtc_isr;
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static struct fasync_struct *hp_sdc_rtc_async_queue;
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static DECLARE_WAIT_QUEUE_HEAD(hp_sdc_rtc_wait);
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static ssize_t hp_sdc_rtc_read(struct file *file, char __user *buf,
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size_t count, loff_t *ppos);
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static long hp_sdc_rtc_unlocked_ioctl(struct file *file,
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unsigned int cmd, unsigned long arg);
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static unsigned int hp_sdc_rtc_poll(struct file *file, poll_table *wait);
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static int hp_sdc_rtc_open(struct inode *inode, struct file *file);
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static int hp_sdc_rtc_fasync (int fd, struct file *filp, int on);
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static void hp_sdc_rtc_isr (int irq, void *dev_id,
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uint8_t status, uint8_t data)
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{
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@ -283,151 +265,6 @@ static inline int hp_sdc_rtc_read_ct(struct timespec64 *res) {
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return 0;
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}
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#if 0 /* not used yet */
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/* Set the i8042 real-time clock */
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static int hp_sdc_rtc_set_rt (struct timeval *setto)
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{
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uint32_t tenms;
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unsigned int days;
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hp_sdc_transaction t;
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uint8_t tseq[11] = {
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HP_SDC_ACT_PRECMD | HP_SDC_ACT_DATAOUT,
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HP_SDC_CMD_SET_RTMS, 3, 0, 0, 0,
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HP_SDC_ACT_PRECMD | HP_SDC_ACT_DATAOUT,
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HP_SDC_CMD_SET_RTD, 2, 0, 0
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};
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t.endidx = 10;
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if (0xffff < setto->tv_sec / 86400) return -1;
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days = setto->tv_sec / 86400;
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if (0xffff < setto->tv_usec / 1000000 / 86400) return -1;
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days += ((setto->tv_sec % 86400) + setto->tv_usec / 1000000) / 86400;
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if (days > 0xffff) return -1;
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if (0xffffff < setto->tv_sec) return -1;
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tenms = setto->tv_sec * 100;
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if (0xffffff < setto->tv_usec / 10000) return -1;
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tenms += setto->tv_usec / 10000;
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if (tenms > 0xffffff) return -1;
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tseq[3] = (uint8_t)(tenms & 0xff);
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tseq[4] = (uint8_t)((tenms >> 8) & 0xff);
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tseq[5] = (uint8_t)((tenms >> 16) & 0xff);
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tseq[9] = (uint8_t)(days & 0xff);
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tseq[10] = (uint8_t)((days >> 8) & 0xff);
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t.seq = tseq;
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if (hp_sdc_enqueue_transaction(&t)) return -1;
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return 0;
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}
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/* Set the i8042 fast handshake timer */
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static int hp_sdc_rtc_set_fhs (struct timeval *setto)
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{
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uint32_t tenms;
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hp_sdc_transaction t;
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uint8_t tseq[5] = {
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HP_SDC_ACT_PRECMD | HP_SDC_ACT_DATAOUT,
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HP_SDC_CMD_SET_FHS, 2, 0, 0
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};
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t.endidx = 4;
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if (0xffff < setto->tv_sec) return -1;
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tenms = setto->tv_sec * 100;
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if (0xffff < setto->tv_usec / 10000) return -1;
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tenms += setto->tv_usec / 10000;
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if (tenms > 0xffff) return -1;
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tseq[3] = (uint8_t)(tenms & 0xff);
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tseq[4] = (uint8_t)((tenms >> 8) & 0xff);
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t.seq = tseq;
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if (hp_sdc_enqueue_transaction(&t)) return -1;
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return 0;
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}
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/* Set the i8042 match timer (a.k.a. alarm) */
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#define hp_sdc_rtc_set_mt (setto) \
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hp_sdc_rtc_set_i8042timer(setto, HP_SDC_CMD_SET_MT)
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/* Set the i8042 delay timer */
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#define hp_sdc_rtc_set_dt (setto) \
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hp_sdc_rtc_set_i8042timer(setto, HP_SDC_CMD_SET_DT)
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/* Set the i8042 cycle timer (a.k.a. periodic) */
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#define hp_sdc_rtc_set_ct (setto) \
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hp_sdc_rtc_set_i8042timer(setto, HP_SDC_CMD_SET_CT)
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/* Set one of the i8042 3-byte wide timers */
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static int hp_sdc_rtc_set_i8042timer (struct timeval *setto, uint8_t setcmd)
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{
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uint32_t tenms;
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hp_sdc_transaction t;
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uint8_t tseq[6] = {
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HP_SDC_ACT_PRECMD | HP_SDC_ACT_DATAOUT,
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0, 3, 0, 0, 0
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};
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t.endidx = 6;
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if (0xffffff < setto->tv_sec) return -1;
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tenms = setto->tv_sec * 100;
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if (0xffffff < setto->tv_usec / 10000) return -1;
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tenms += setto->tv_usec / 10000;
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if (tenms > 0xffffff) return -1;
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tseq[1] = setcmd;
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tseq[3] = (uint8_t)(tenms & 0xff);
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tseq[4] = (uint8_t)((tenms >> 8) & 0xff);
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tseq[5] = (uint8_t)((tenms >> 16) & 0xff);
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t.seq = tseq;
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if (hp_sdc_enqueue_transaction(&t)) {
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return -1;
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}
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return 0;
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}
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#endif
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static ssize_t hp_sdc_rtc_read(struct file *file, char __user *buf,
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size_t count, loff_t *ppos) {
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ssize_t retval;
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if (count < sizeof(unsigned long))
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return -EINVAL;
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retval = put_user(68, (unsigned long __user *)buf);
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return retval;
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}
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static __poll_t hp_sdc_rtc_poll(struct file *file, poll_table *wait)
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{
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unsigned long l;
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l = 0;
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if (l != 0)
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return EPOLLIN | EPOLLRDNORM;
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return 0;
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}
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static int hp_sdc_rtc_open(struct inode *inode, struct file *file)
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{
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return 0;
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}
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static int hp_sdc_rtc_fasync (int fd, struct file *filp, int on)
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{
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return fasync_helper (fd, filp, on, &hp_sdc_rtc_async_queue);
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}
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static int hp_sdc_rtc_proc_show(struct seq_file *m, void *v)
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{
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#define YN(bit) ("no")
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@ -507,182 +344,6 @@ static int hp_sdc_rtc_proc_show(struct seq_file *m, void *v)
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#undef NY
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}
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static int hp_sdc_rtc_ioctl(struct file *file,
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unsigned int cmd, unsigned long arg)
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{
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#if 1
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return -EINVAL;
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#else
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struct rtc_time wtime;
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struct timeval ttime;
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int use_wtime = 0;
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/* This needs major work. */
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switch (cmd) {
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case RTC_AIE_OFF: /* Mask alarm int. enab. bit */
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case RTC_AIE_ON: /* Allow alarm interrupts. */
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case RTC_PIE_OFF: /* Mask periodic int. enab. bit */
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case RTC_PIE_ON: /* Allow periodic ints */
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case RTC_UIE_ON: /* Allow ints for RTC updates. */
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case RTC_UIE_OFF: /* Allow ints for RTC updates. */
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{
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/* We cannot mask individual user timers and we
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cannot tell them apart when they occur, so it
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would be disingenuous to succeed these IOCTLs */
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return -EINVAL;
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}
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case RTC_ALM_READ: /* Read the present alarm time */
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{
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if (hp_sdc_rtc_read_mt(&ttime)) return -EFAULT;
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if (hp_sdc_rtc_read_bbrtc(&wtime)) return -EFAULT;
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wtime.tm_hour = ttime.tv_sec / 3600; ttime.tv_sec %= 3600;
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wtime.tm_min = ttime.tv_sec / 60; ttime.tv_sec %= 60;
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wtime.tm_sec = ttime.tv_sec;
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break;
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}
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case RTC_IRQP_READ: /* Read the periodic IRQ rate. */
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{
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return put_user(hp_sdc_rtc_freq, (unsigned long *)arg);
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}
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case RTC_IRQP_SET: /* Set periodic IRQ rate. */
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{
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/*
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* The max we can do is 100Hz.
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*/
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if ((arg < 1) || (arg > 100)) return -EINVAL;
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ttime.tv_sec = 0;
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ttime.tv_usec = 1000000 / arg;
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if (hp_sdc_rtc_set_ct(&ttime)) return -EFAULT;
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hp_sdc_rtc_freq = arg;
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return 0;
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}
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case RTC_ALM_SET: /* Store a time into the alarm */
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{
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/*
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* This expects a struct hp_sdc_rtc_time. Writing 0xff means
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* "don't care" or "match all" for PC timers. The HP SDC
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* does not support that perk, but it could be emulated fairly
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* easily. Only the tm_hour, tm_min and tm_sec are used.
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* We could do it with 10ms accuracy with the HP SDC, if the
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* rtc interface left us a way to do that.
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*/
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struct hp_sdc_rtc_time alm_tm;
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if (copy_from_user(&alm_tm, (struct hp_sdc_rtc_time*)arg,
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sizeof(struct hp_sdc_rtc_time)))
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return -EFAULT;
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if (alm_tm.tm_hour > 23) return -EINVAL;
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if (alm_tm.tm_min > 59) return -EINVAL;
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if (alm_tm.tm_sec > 59) return -EINVAL;
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ttime.sec = alm_tm.tm_hour * 3600 +
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alm_tm.tm_min * 60 + alm_tm.tm_sec;
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ttime.usec = 0;
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if (hp_sdc_rtc_set_mt(&ttime)) return -EFAULT;
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return 0;
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}
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case RTC_RD_TIME: /* Read the time/date from RTC */
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{
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if (hp_sdc_rtc_read_bbrtc(&wtime)) return -EFAULT;
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break;
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}
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case RTC_SET_TIME: /* Set the RTC */
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{
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struct rtc_time hp_sdc_rtc_tm;
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unsigned char mon, day, hrs, min, sec, leap_yr;
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unsigned int yrs;
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if (!capable(CAP_SYS_TIME))
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return -EACCES;
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if (copy_from_user(&hp_sdc_rtc_tm, (struct rtc_time *)arg,
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sizeof(struct rtc_time)))
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return -EFAULT;
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yrs = hp_sdc_rtc_tm.tm_year + 1900;
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mon = hp_sdc_rtc_tm.tm_mon + 1; /* tm_mon starts at zero */
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day = hp_sdc_rtc_tm.tm_mday;
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hrs = hp_sdc_rtc_tm.tm_hour;
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min = hp_sdc_rtc_tm.tm_min;
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sec = hp_sdc_rtc_tm.tm_sec;
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if (yrs < 1970)
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return -EINVAL;
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leap_yr = ((!(yrs % 4) && (yrs % 100)) || !(yrs % 400));
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if ((mon > 12) || (day == 0))
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return -EINVAL;
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if (day > (days_in_mo[mon] + ((mon == 2) && leap_yr)))
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return -EINVAL;
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if ((hrs >= 24) || (min >= 60) || (sec >= 60))
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return -EINVAL;
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if ((yrs -= eH) > 255) /* They are unsigned */
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return -EINVAL;
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return 0;
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}
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case RTC_EPOCH_READ: /* Read the epoch. */
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{
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return put_user (epoch, (unsigned long *)arg);
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}
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case RTC_EPOCH_SET: /* Set the epoch. */
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{
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/*
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* There were no RTC clocks before 1900.
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*/
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if (arg < 1900)
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return -EINVAL;
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if (!capable(CAP_SYS_TIME))
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return -EACCES;
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epoch = arg;
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return 0;
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}
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default:
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return -EINVAL;
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}
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return copy_to_user((void *)arg, &wtime, sizeof wtime) ? -EFAULT : 0;
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#endif
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}
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static long hp_sdc_rtc_unlocked_ioctl(struct file *file,
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unsigned int cmd, unsigned long arg)
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{
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int ret;
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mutex_lock(&hp_sdc_rtc_mutex);
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ret = hp_sdc_rtc_ioctl(file, cmd, arg);
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mutex_unlock(&hp_sdc_rtc_mutex);
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return ret;
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}
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static const struct file_operations hp_sdc_rtc_fops = {
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.owner = THIS_MODULE,
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.llseek = no_llseek,
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.read = hp_sdc_rtc_read,
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.poll = hp_sdc_rtc_poll,
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.unlocked_ioctl = hp_sdc_rtc_unlocked_ioctl,
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.open = hp_sdc_rtc_open,
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.fasync = hp_sdc_rtc_fasync,
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};
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static struct miscdevice hp_sdc_rtc_dev = {
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.minor = RTC_MINOR,
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.name = "rtc_HIL",
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.fops = &hp_sdc_rtc_fops
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};
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static int __init hp_sdc_rtc_init(void)
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{
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int ret;
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@ -696,8 +357,6 @@ static int __init hp_sdc_rtc_init(void)
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if ((ret = hp_sdc_request_timer_irq(&hp_sdc_rtc_isr)))
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return ret;
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if (misc_register(&hp_sdc_rtc_dev) != 0)
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printk(KERN_INFO "Could not register misc. dev for i8042 rtc\n");
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proc_create_single("driver/rtc", 0, NULL, hp_sdc_rtc_proc_show);
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@ -710,7 +369,6 @@ static int __init hp_sdc_rtc_init(void)
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static void __exit hp_sdc_rtc_exit(void)
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{
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remove_proc_entry ("driver/rtc", NULL);
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misc_deregister(&hp_sdc_rtc_dev);
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hp_sdc_release_timer_irq(hp_sdc_rtc_isr);
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printk(KERN_INFO "HP i8042 SDC + MSM-58321 RTC support unloaded\n");
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}
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