diff options
Diffstat (limited to 'drivers/staging/comedi/comedi_fops.c')
| -rw-r--r-- | drivers/staging/comedi/comedi_fops.c | 1007 |
1 files changed, 477 insertions, 530 deletions
diff --git a/drivers/staging/comedi/comedi_fops.c b/drivers/staging/comedi/comedi_fops.c index 9b038e4..195d56d 100644 --- a/drivers/staging/comedi/comedi_fops.c +++ b/drivers/staging/comedi/comedi_fops.c @@ -49,10 +49,6 @@ #include "comedi_internal.h" -MODULE_AUTHOR("http://www.comedi.org"); -MODULE_DESCRIPTION("Comedi core module"); -MODULE_LICENSE("GPL"); - #ifdef CONFIG_COMEDI_DEBUG int comedi_debug; EXPORT_SYMBOL(comedi_debug); @@ -62,11 +58,6 @@ MODULE_PARM_DESC(comedi_debug, ); #endif -bool comedi_autoconfig = 1; -module_param(comedi_autoconfig, bool, S_IRUGO); -MODULE_PARM_DESC(comedi_autoconfig, - "enable drivers to auto-configure comedi devices (default 1)"); - static int comedi_num_legacy_minors; module_param(comedi_num_legacy_minors, int, S_IRUGO); MODULE_PARM_DESC(comedi_num_legacy_minors, @@ -86,17 +77,58 @@ MODULE_PARM_DESC(comedi_default_buf_maxsize_kb, "default maximum size of asynchronous buffer in KiB (default " __MODULE_STRING(CONFIG_COMEDI_DEFAULT_BUF_MAXSIZE_KB) ")"); +struct comedi_file_info { + struct comedi_device *device; + struct comedi_subdevice *read_subdevice; + struct comedi_subdevice *write_subdevice; + struct device *hardware_device; +}; + static DEFINE_SPINLOCK(comedi_file_info_table_lock); -static struct comedi_device_file_info -*comedi_file_info_table[COMEDI_NUM_MINORS]; +static struct comedi_file_info *comedi_file_info_table[COMEDI_NUM_MINORS]; -static void do_become_nonbusy(struct comedi_device *dev, - struct comedi_subdevice *s); -static int do_cancel(struct comedi_device *dev, struct comedi_subdevice *s); +static struct comedi_file_info *comedi_file_info_from_minor(unsigned minor) +{ + struct comedi_file_info *info; + + BUG_ON(minor >= COMEDI_NUM_MINORS); + spin_lock(&comedi_file_info_table_lock); + info = comedi_file_info_table[minor]; + spin_unlock(&comedi_file_info_table_lock); + return info; +} + +static struct comedi_device * +comedi_dev_from_file_info(struct comedi_file_info *info) +{ + return info ? info->device : NULL; +} + +struct comedi_device *comedi_dev_from_minor(unsigned minor) +{ + return comedi_dev_from_file_info(comedi_file_info_from_minor(minor)); +} +EXPORT_SYMBOL_GPL(comedi_dev_from_minor); -static int comedi_fasync(int fd, struct file *file, int on); +static struct comedi_subdevice * +comedi_read_subdevice(const struct comedi_file_info *info) +{ + if (info->read_subdevice) + return info->read_subdevice; + if (info->device) + return info->device->read_subdev; + return NULL; +} -static int is_device_busy(struct comedi_device *dev); +static struct comedi_subdevice * +comedi_write_subdevice(const struct comedi_file_info *info) +{ + if (info->write_subdevice) + return info->write_subdevice; + if (info->device) + return info->device->write_subdev; + return NULL; +} static int resize_async_buffer(struct comedi_device *dev, struct comedi_subdevice *s, @@ -134,7 +166,7 @@ static int resize_async_buffer(struct comedi_device *dev, } DPRINTK("comedi%i subd %d buffer resized to %i bytes\n", - dev->minor, (int)(s - dev->subdevices), async->prealloc_bufsz); + dev->minor, s->index, async->prealloc_bufsz); return 0; } @@ -143,8 +175,8 @@ static int resize_async_buffer(struct comedi_device *dev, static ssize_t show_max_read_buffer_kb(struct device *dev, struct device_attribute *attr, char *buf) { - struct comedi_device_file_info *info = dev_get_drvdata(dev); - struct comedi_subdevice *s = comedi_get_read_subdevice(info); + struct comedi_file_info *info = dev_get_drvdata(dev); + struct comedi_subdevice *s = comedi_read_subdevice(info); unsigned int size = 0; mutex_lock(&info->device->mutex); @@ -159,8 +191,8 @@ static ssize_t store_max_read_buffer_kb(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { - struct comedi_device_file_info *info = dev_get_drvdata(dev); - struct comedi_subdevice *s = comedi_get_read_subdevice(info); + struct comedi_file_info *info = dev_get_drvdata(dev); + struct comedi_subdevice *s = comedi_read_subdevice(info); unsigned int size; int err; @@ -184,8 +216,8 @@ static ssize_t store_max_read_buffer_kb(struct device *dev, static ssize_t show_read_buffer_kb(struct device *dev, struct device_attribute *attr, char *buf) { - struct comedi_device_file_info *info = dev_get_drvdata(dev); - struct comedi_subdevice *s = comedi_get_read_subdevice(info); + struct comedi_file_info *info = dev_get_drvdata(dev); + struct comedi_subdevice *s = comedi_read_subdevice(info); unsigned int size = 0; mutex_lock(&info->device->mutex); @@ -200,8 +232,8 @@ static ssize_t store_read_buffer_kb(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { - struct comedi_device_file_info *info = dev_get_drvdata(dev); - struct comedi_subdevice *s = comedi_get_read_subdevice(info); + struct comedi_file_info *info = dev_get_drvdata(dev); + struct comedi_subdevice *s = comedi_read_subdevice(info); unsigned int size; int err; @@ -226,8 +258,8 @@ static ssize_t show_max_write_buffer_kb(struct device *dev, struct device_attribute *attr, char *buf) { - struct comedi_device_file_info *info = dev_get_drvdata(dev); - struct comedi_subdevice *s = comedi_get_write_subdevice(info); + struct comedi_file_info *info = dev_get_drvdata(dev); + struct comedi_subdevice *s = comedi_write_subdevice(info); unsigned int size = 0; mutex_lock(&info->device->mutex); @@ -242,8 +274,8 @@ static ssize_t store_max_write_buffer_kb(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { - struct comedi_device_file_info *info = dev_get_drvdata(dev); - struct comedi_subdevice *s = comedi_get_write_subdevice(info); + struct comedi_file_info *info = dev_get_drvdata(dev); + struct comedi_subdevice *s = comedi_write_subdevice(info); unsigned int size; int err; @@ -267,8 +299,8 @@ static ssize_t store_max_write_buffer_kb(struct device *dev, static ssize_t show_write_buffer_kb(struct device *dev, struct device_attribute *attr, char *buf) { - struct comedi_device_file_info *info = dev_get_drvdata(dev); - struct comedi_subdevice *s = comedi_get_write_subdevice(info); + struct comedi_file_info *info = dev_get_drvdata(dev); + struct comedi_subdevice *s = comedi_write_subdevice(info); unsigned int size = 0; mutex_lock(&info->device->mutex); @@ -283,8 +315,8 @@ static ssize_t store_write_buffer_kb(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { - struct comedi_device_file_info *info = dev_get_drvdata(dev); - struct comedi_subdevice *s = comedi_get_write_subdevice(info); + struct comedi_file_info *info = dev_get_drvdata(dev); + struct comedi_subdevice *s = comedi_write_subdevice(info); unsigned int size; int err; @@ -317,6 +349,103 @@ static struct device_attribute comedi_dev_attrs[] = { __ATTR_NULL }; +static void comedi_set_subdevice_runflags(struct comedi_subdevice *s, + unsigned mask, unsigned bits) +{ + unsigned long flags; + + spin_lock_irqsave(&s->spin_lock, flags); + s->runflags &= ~mask; + s->runflags |= (bits & mask); + spin_unlock_irqrestore(&s->spin_lock, flags); +} + +static unsigned comedi_get_subdevice_runflags(struct comedi_subdevice *s) +{ + unsigned long flags; + unsigned runflags; + + spin_lock_irqsave(&s->spin_lock, flags); + runflags = s->runflags; + spin_unlock_irqrestore(&s->spin_lock, flags); + return runflags; +} + +bool comedi_is_subdevice_running(struct comedi_subdevice *s) +{ + unsigned runflags = comedi_get_subdevice_runflags(s); + + return (runflags & SRF_RUNNING) ? true : false; +} +EXPORT_SYMBOL_GPL(comedi_is_subdevice_running); + +static bool comedi_is_subdevice_in_error(struct comedi_subdevice *s) +{ + unsigned runflags = comedi_get_subdevice_runflags(s); + + return (runflags & SRF_ERROR) ? true : false; +} + +static bool comedi_is_subdevice_idle(struct comedi_subdevice *s) +{ + unsigned runflags = comedi_get_subdevice_runflags(s); + + return (runflags & (SRF_ERROR | SRF_RUNNING)) ? false : true; +} + +/* + This function restores a subdevice to an idle state. + */ +static void do_become_nonbusy(struct comedi_device *dev, + struct comedi_subdevice *s) +{ + struct comedi_async *async = s->async; + + comedi_set_subdevice_runflags(s, SRF_RUNNING, 0); + if (async) { + comedi_buf_reset(async); + async->inttrig = NULL; + kfree(async->cmd.chanlist); + async->cmd.chanlist = NULL; + } else { + dev_err(dev->class_dev, + "BUG: (?) do_become_nonbusy called with async=NULL\n"); + } + + s->busy = NULL; +} + +static int do_cancel(struct comedi_device *dev, struct comedi_subdevice *s) +{ + int ret = 0; + + if (comedi_is_subdevice_running(s) && s->cancel) + ret = s->cancel(dev, s); + + do_become_nonbusy(dev, s); + + return ret; +} + +static int is_device_busy(struct comedi_device *dev) +{ + struct comedi_subdevice *s; + int i; + + if (!dev->attached) + return 0; + + for (i = 0; i < dev->n_subdevices; i++) { + s = &dev->subdevices[i]; + if (s->busy) + return 1; + if (s->async && s->async->mmap_count) + return 1; + } + + return 0; +} + /* COMEDI_DEVCONFIG device config ioctl @@ -335,8 +464,6 @@ static int do_devconfig_ioctl(struct comedi_device *dev, { struct comedi_devconfig it; int ret; - unsigned char *aux_data = NULL; - int aux_len; if (!capable(CAP_SYS_ADMIN)) return -EPERM; @@ -352,36 +479,15 @@ static int do_devconfig_ioctl(struct comedi_device *dev, return 0; } - if (copy_from_user(&it, arg, sizeof(struct comedi_devconfig))) + if (copy_from_user(&it, arg, sizeof(it))) return -EFAULT; it.board_name[COMEDI_NAMELEN - 1] = 0; - if (comedi_aux_data(it.options, 0) && - it.options[COMEDI_DEVCONF_AUX_DATA_LENGTH]) { - int bit_shift; - aux_len = it.options[COMEDI_DEVCONF_AUX_DATA_LENGTH]; - if (aux_len < 0) - return -EFAULT; - - aux_data = vmalloc(aux_len); - if (!aux_data) - return -ENOMEM; - - if (copy_from_user(aux_data, - (unsigned char __user * - )comedi_aux_data(it.options, 0), aux_len)) { - vfree(aux_data); - return -EFAULT; - } - it.options[COMEDI_DEVCONF_AUX_DATA_LO] = - (unsigned long)aux_data; - if (sizeof(void *) > sizeof(int)) { - bit_shift = sizeof(int) * 8; - it.options[COMEDI_DEVCONF_AUX_DATA_HI] = - ((unsigned long)aux_data) >> bit_shift; - } else - it.options[COMEDI_DEVCONF_AUX_DATA_HI] = 0; + if (it.options[COMEDI_DEVCONF_AUX_DATA_LENGTH]) { + dev_warn(dev->class_dev, + "comedi_config --init_data is deprecated\n"); + return -EINVAL; } ret = comedi_device_attach(dev, &it); @@ -392,9 +498,6 @@ static int do_devconfig_ioctl(struct comedi_device *dev, } } - if (aux_data) - vfree(aux_data); - return ret; } @@ -420,7 +523,7 @@ static int do_bufconfig_ioctl(struct comedi_device *dev, struct comedi_subdevice *s; int retval = 0; - if (copy_from_user(&bc, arg, sizeof(struct comedi_bufconfig))) + if (copy_from_user(&bc, arg, sizeof(bc))) return -EFAULT; if (bc.subdevice >= dev->n_subdevices || bc.subdevice < 0) @@ -453,7 +556,7 @@ static int do_bufconfig_ioctl(struct comedi_device *dev, bc.maximum_size = async->max_bufsize; copyback: - if (copy_to_user(arg, &bc, sizeof(struct comedi_bufconfig))) + if (copy_to_user(arg, &bc, sizeof(bc))) return -EFAULT; return 0; @@ -477,14 +580,10 @@ static int do_devinfo_ioctl(struct comedi_device *dev, struct comedi_devinfo __user *arg, struct file *file) { - struct comedi_devinfo devinfo; const unsigned minor = iminor(file->f_dentry->d_inode); - struct comedi_device_file_info *dev_file_info = - comedi_get_device_file_info(minor); - struct comedi_subdevice *read_subdev = - comedi_get_read_subdevice(dev_file_info); - struct comedi_subdevice *write_subdev = - comedi_get_write_subdevice(dev_file_info); + struct comedi_file_info *info = comedi_file_info_from_minor(minor); + struct comedi_subdevice *s; + struct comedi_devinfo devinfo; memset(&devinfo, 0, sizeof(devinfo)); @@ -494,17 +593,19 @@ static int do_devinfo_ioctl(struct comedi_device *dev, strlcpy(devinfo.driver_name, dev->driver->driver_name, COMEDI_NAMELEN); strlcpy(devinfo.board_name, dev->board_name, COMEDI_NAMELEN); - if (read_subdev) - devinfo.read_subdevice = read_subdev - dev->subdevices; + s = comedi_read_subdevice(info); + if (s) + devinfo.read_subdevice = s->index; else devinfo.read_subdevice = -1; - if (write_subdev) - devinfo.write_subdevice = write_subdev - dev->subdevices; + s = comedi_write_subdevice(info); + if (s) + devinfo.write_subdevice = s->index; else devinfo.write_subdevice = -1; - if (copy_to_user(arg, &devinfo, sizeof(struct comedi_devinfo))) + if (copy_to_user(arg, &devinfo, sizeof(devinfo))) return -EFAULT; return 0; @@ -531,9 +632,7 @@ static int do_subdinfo_ioctl(struct comedi_device *dev, struct comedi_subdinfo *tmp, *us; struct comedi_subdevice *s; - tmp = - kcalloc(dev->n_subdevices, sizeof(struct comedi_subdinfo), - GFP_KERNEL); + tmp = kcalloc(dev->n_subdevices, sizeof(*tmp), GFP_KERNEL); if (!tmp) return -ENOMEM; @@ -545,7 +644,7 @@ static int do_subdinfo_ioctl(struct comedi_device *dev, us->type = s->type; us->n_chan = s->n_chan; us->subd_flags = s->subdev_flags; - if (comedi_get_subdevice_runflags(s) & SRF_RUNNING) + if (comedi_is_subdevice_running(s)) us->subd_flags |= SDF_RUNNING; #define TIMER_nanosec 5 /* backwards compatibility */ us->timer_type = TIMER_nanosec; @@ -584,8 +683,7 @@ static int do_subdinfo_ioctl(struct comedi_device *dev, us->settling_time_0 = s->settling_time_0; } - ret = copy_to_user(arg, tmp, - dev->n_subdevices * sizeof(struct comedi_subdinfo)); + ret = copy_to_user(arg, tmp, dev->n_subdevices * sizeof(*tmp)); kfree(tmp); @@ -612,7 +710,7 @@ static int do_chaninfo_ioctl(struct comedi_device *dev, struct comedi_subdevice *s; struct comedi_chaninfo it; - if (copy_from_user(&it, arg, sizeof(struct comedi_chaninfo))) + if (copy_from_user(&it, arg, sizeof(it))) return -EFAULT; if (it.subdev >= dev->n_subdevices) @@ -679,7 +777,7 @@ static int do_bufinfo_ioctl(struct comedi_device *dev, struct comedi_subdevice *s; struct comedi_async *async; - if (copy_from_user(&bi, arg, sizeof(struct comedi_bufinfo))) + if (copy_from_user(&bi, arg, sizeof(bi))) return -EFAULT; if (bi.subdevice >= dev->n_subdevices || bi.subdevice < 0) @@ -714,9 +812,8 @@ static int do_bufinfo_ioctl(struct comedi_device *dev, bi.bytes_read = comedi_buf_read_alloc(async, bi.bytes_read); comedi_buf_read_free(async, bi.bytes_read); - if (!(comedi_get_subdevice_runflags(s) & (SRF_ERROR | - SRF_RUNNING)) - && async->buf_write_count == async->buf_read_count) { + if (comedi_is_subdevice_idle(s) && + async->buf_write_count == async->buf_read_count) { do_become_nonbusy(dev, s); } } @@ -734,103 +831,12 @@ copyback_position: bi.buf_read_ptr = async->buf_read_ptr; copyback: - if (copy_to_user(arg, &bi, sizeof(struct comedi_bufinfo))) + if (copy_to_user(arg, &bi, sizeof(bi))) return -EFAULT; return 0; } -static int parse_insn(struct comedi_device *dev, struct comedi_insn *insn, - unsigned int *data, void *file); -/* - * COMEDI_INSNLIST - * synchronous instructions - * - * arg: - * pointer to sync cmd structure - * - * reads: - * sync cmd struct at arg - * instruction list - * data (for writes) - * - * writes: - * data (for reads) - */ -/* arbitrary limits */ -#define MAX_SAMPLES 256 -static int do_insnlist_ioctl(struct comedi_device *dev, - struct comedi_insnlist __user *arg, void *file) -{ - struct comedi_insnlist insnlist; - struct comedi_insn *insns = NULL; - unsigned int *data = NULL; - int i = 0; - int ret = 0; - - if (copy_from_user(&insnlist, arg, sizeof(struct comedi_insnlist))) - return -EFAULT; - - data = kmalloc(sizeof(unsigned int) * MAX_SAMPLES, GFP_KERNEL); - if (!data) { - DPRINTK("kmalloc failed\n"); - ret = -ENOMEM; - goto error; - } - - insns = - kcalloc(insnlist.n_insns, sizeof(struct comedi_insn), GFP_KERNEL); - if (!insns) { - DPRINTK("kmalloc failed\n"); - ret = -ENOMEM; - goto error; - } - - if (copy_from_user(insns, insnlist.insns, - sizeof(struct comedi_insn) * insnlist.n_insns)) { - DPRINTK("copy_from_user failed\n"); - ret = -EFAULT; - goto error; - } - - for (i = 0; i < insnlist.n_insns; i++) { - if (insns[i].n > MAX_SAMPLES) { - DPRINTK("number of samples too large\n"); - ret = -EINVAL; - goto error; - } - if (insns[i].insn & INSN_MASK_WRITE) { - if (copy_from_user(data, insns[i].data, - insns[i].n * sizeof(unsigned int))) { - DPRINTK("copy_from_user failed\n"); - ret = -EFAULT; - goto error; - } - } - ret = parse_insn(dev, insns + i, data, file); - if (ret < 0) - goto error; - if (insns[i].insn & INSN_MASK_READ) { - if (copy_to_user(insns[i].data, data, - insns[i].n * sizeof(unsigned int))) { - DPRINTK("copy_to_user failed\n"); - ret = -EFAULT; - goto error; - } - } - if (need_resched()) - schedule(); - } - -error: - kfree(insns); - kfree(data); - - if (ret < 0) - return ret; - return i; -} - static int check_insn_config_length(struct comedi_insn *insn, unsigned int *data) { @@ -1062,6 +1068,94 @@ out: } /* + * COMEDI_INSNLIST + * synchronous instructions + * + * arg: + * pointer to sync cmd structure + * + * reads: + * sync cmd struct at arg + * instruction list + * data (for writes) + * + * writes: + * data (for reads) + */ +/* arbitrary limits */ +#define MAX_SAMPLES 256 +static int do_insnlist_ioctl(struct comedi_device *dev, + struct comedi_insnlist __user *arg, void *file) +{ + struct comedi_insnlist insnlist; + struct comedi_insn *insns = NULL; + unsigned int *data = NULL; + int i = 0; + int ret = 0; + + if (copy_from_user(&insnlist, arg, sizeof(insnlist))) + return -EFAULT; + + data = kmalloc(sizeof(unsigned int) * MAX_SAMPLES, GFP_KERNEL); + if (!data) { + DPRINTK("kmalloc failed\n"); + ret = -ENOMEM; + goto error; + } + + insns = kcalloc(insnlist.n_insns, sizeof(*insns), GFP_KERNEL); + if (!insns) { + DPRINTK("kmalloc failed\n"); + ret = -ENOMEM; + goto error; + } + + if (copy_from_user(insns, insnlist.insns, + sizeof(*insns) * insnlist.n_insns)) { + DPRINTK("copy_from_user failed\n"); + ret = -EFAULT; + goto error; + } + + for (i = 0; i < insnlist.n_insns; i++) { + if (insns[i].n > MAX_SAMPLES) { + DPRINTK("number of samples too large\n"); + ret = -EINVAL; + goto error; + } + if (insns[i].insn & INSN_MASK_WRITE) { + if (copy_from_user(data, insns[i].data, + insns[i].n * sizeof(unsigned int))) { + DPRINTK("copy_from_user failed\n"); + ret = -EFAULT; + goto error; + } + } + ret = parse_insn(dev, insns + i, data, file); + if (ret < 0) + goto error; + if (insns[i].insn & INSN_MASK_READ) { + if (copy_to_user(insns[i].data, data, + insns[i].n * sizeof(unsigned int))) { + DPRINTK("copy_to_user failed\n"); + ret = -EFAULT; + goto error; + } + } + if (need_resched()) + schedule(); + } + +error: + kfree(insns); + kfree(data); + + if (ret < 0) + return ret; + return i; +} + +/* * COMEDI_INSN * synchronous instructions * @@ -1088,7 +1182,7 @@ static int do_insn_ioctl(struct comedi_device *dev, goto error; } - if (copy_from_user(&insn, arg, sizeof(struct comedi_insn))) { + if (copy_from_user(&insn, arg, sizeof(insn))) { ret = -EFAULT; goto error; } @@ -1123,17 +1217,6 @@ error: return ret; } -static void comedi_set_subdevice_runflags(struct comedi_subdevice *s, - unsigned mask, unsigned bits) -{ - unsigned long flags; - - spin_lock_irqsave(&s->spin_lock, flags); - s->runflags &= ~mask; - s->runflags |= (bits & mask); - spin_unlock_irqrestore(&s->spin_lock, flags); -} - static int do_cmd_ioctl(struct comedi_device *dev, struct comedi_cmd __user *arg, void *file) { @@ -1143,7 +1226,7 @@ static int do_cmd_ioctl(struct comedi_device *dev, int ret = 0; unsigned int __user *user_chanlist; - if (copy_from_user(&cmd, arg, sizeof(struct comedi_cmd))) { + if (copy_from_user(&cmd, arg, sizeof(cmd))) { DPRINTK("bad cmd address\n"); return -EFAULT; } @@ -1233,7 +1316,7 @@ static int do_cmd_ioctl(struct comedi_device *dev, /* restore chanlist pointer before copying back */ cmd.chanlist = (unsigned int __force *)user_chanlist; cmd.data = NULL; - if (copy_to_user(arg, &cmd, sizeof(struct comedi_cmd))) { + if (copy_to_user(arg, &cmd, sizeof(cmd))) { DPRINTK("fault writing cmd\n"); ret = -EFAULT; goto cleanup; @@ -1248,7 +1331,7 @@ static int do_cmd_ioctl(struct comedi_device *dev, goto cleanup; } - comedi_reset_async_buf(async); + comedi_buf_reset(async); async->cb_mask = COMEDI_CB_EOA | COMEDI_CB_BLOCK | COMEDI_CB_ERROR | @@ -1292,7 +1375,7 @@ static int do_cmdtest_ioctl(struct comedi_device *dev, unsigned int *chanlist = NULL; unsigned int __user *user_chanlist; - if (copy_from_user(&cmd, arg, sizeof(struct comedi_cmd))) { + if (copy_from_user(&cmd, arg, sizeof(cmd))) { DPRINTK("bad cmd address\n"); return -EFAULT; } @@ -1356,7 +1439,7 @@ static int do_cmdtest_ioctl(struct comedi_device *dev, /* restore chanlist pointer before copying back */ cmd.chanlist = (unsigned int __force *)user_chanlist; - if (copy_to_user(arg, &cmd, sizeof(struct comedi_cmd))) { + if (copy_to_user(arg, &cmd, sizeof(cmd))) { DPRINTK("bad cmd address\n"); ret = -EFAULT; goto cleanup; @@ -1533,25 +1616,28 @@ static long comedi_unlocked_ioctl(struct file *file, unsigned int cmd, unsigned long arg) { const unsigned minor = iminor(file->f_dentry->d_inode); - struct comedi_device_file_info *dev_file_info = - comedi_get_device_file_info(minor); - struct comedi_device *dev; + struct comedi_file_info *info = comedi_file_info_from_minor(minor); + struct comedi_device *dev = comedi_dev_from_file_info(info); int rc; - if (dev_file_info == NULL || dev_file_info->device == NULL) + if (!dev) return -ENODEV; - dev = dev_file_info->device; mutex_lock(&dev->mutex); /* Device config is special, because it must work on * an unconfigured device. */ if (cmd == COMEDI_DEVCONFIG) { + if (minor >= COMEDI_NUM_BOARD_MINORS) { + /* Device config not appropriate on non-board minors. */ + rc = -ENOTTY; + goto done; + } rc = do_devconfig_ioctl(dev, (struct comedi_devconfig __user *)arg); if (rc == 0) /* Evade comedi_auto_unconfig(). */ - dev_file_info->hardware_device = NULL; + info->hardware_device = NULL; goto done; } @@ -1624,19 +1710,6 @@ done: return rc; } -static int do_cancel(struct comedi_device *dev, struct comedi_subdevice *s) -{ - int ret = 0; - - if ((comedi_get_subdevice_runflags(s) & SRF_RUNNING) && s->cancel) - ret = s->cancel(dev, s); - - do_become_nonbusy(dev, s); - - return ret; -} - - static void comedi_vm_open(struct vm_area_struct *area) { struct comedi_async *async; @@ -1671,40 +1744,38 @@ static struct vm_operations_struct comedi_vm_ops = { static int comedi_mmap(struct file *file, struct vm_area_struct *vma) { const unsigned minor = iminor(file->f_dentry->d_inode); - struct comedi_async *async = NULL; + struct comedi_file_info *info = comedi_file_info_from_minor(minor); + struct comedi_device *dev = comedi_dev_from_file_info(info); + struct comedi_subdevice *s; + struct comedi_async *async; unsigned long start = vma->vm_start; unsigned long size; int n_pages; int i; int retval; - struct comedi_subdevice *s; - struct comedi_device_file_info *dev_file_info; - struct comedi_device *dev; - dev_file_info = comedi_get_device_file_info(minor); - if (dev_file_info == NULL) - return -ENODEV; - dev = dev_file_info->device; - if (dev == NULL) + if (!dev) return -ENODEV; mutex_lock(&dev->mutex); + if (!dev->attached) { DPRINTK("no driver configured on comedi%i\n", dev->minor); retval = -ENODEV; goto done; } + if (vma->vm_flags & VM_WRITE) - s = comedi_get_write_subdevice(dev_file_info); + s = comedi_write_subdevice(info); else - s = comedi_get_read_subdevice(dev_file_info); - - if (s == NULL) { + s = comedi_read_subdevice(info); + if (!s) { retval = -EINVAL; goto done; } + async = s->async; - if (async == NULL) { + if (!async) { retval = -EINVAL; goto done; } @@ -1727,11 +1798,11 @@ static int comedi_mmap(struct file *file, struct vm_area_struct *vma) n_pages = size >> PAGE_SHIFT; for (i = 0; i < n_pages; ++i) { + struct comedi_buf_page *buf = &async->buf_page_list[i]; + if (remap_pfn_range(vma, start, - page_to_pfn(virt_to_page - (async->buf_page_list - [i].virt_addr)), PAGE_SIZE, - PAGE_SHARED)) { + page_to_pfn(virt_to_page(buf->virt_addr)), + PAGE_SIZE, PAGE_SHARED)) { retval = -EAGAIN; goto done; } @@ -1753,50 +1824,40 @@ static unsigned int comedi_poll(struct file *file, poll_table *wait) { unsigned int mask = 0; const unsigned minor = iminor(file->f_dentry->d_inode); - struct comedi_subdevice *read_subdev; - struct comedi_subdevice *write_subdev; - struct comedi_device_file_info *dev_file_info; - struct comedi_device *dev; - dev_file_info = comedi_get_device_file_info(minor); + struct comedi_file_info *info = comedi_file_info_from_minor(minor); + struct comedi_device *dev = comedi_dev_from_file_info(info); + struct comedi_subdevice *s; - if (dev_file_info == NULL) - return -ENODEV; - dev = dev_file_info->device; - if (dev == NULL) + if (!dev) return -ENODEV; mutex_lock(&dev->mutex); + if (!dev->attached) { DPRINTK("no driver configured on comedi%i\n", dev->minor); - mutex_unlock(&dev->mutex); - return 0; + goto done; } - mask = 0; - read_subdev = comedi_get_read_subdevice(dev_file_info); - if (read_subdev) { - poll_wait(file, &read_subdev->async->wait_head, wait); - if (!read_subdev->busy - || comedi_buf_read_n_available(read_subdev->async) > 0 - || !(comedi_get_subdevice_runflags(read_subdev) & - SRF_RUNNING)) { + s = comedi_read_subdevice(info); + if (s && s->async) { + poll_wait(file, &s->async->wait_head, wait); + if (!s->busy || !comedi_is_subdevice_running(s) || + comedi_buf_read_n_available(s->async) > 0) mask |= POLLIN | POLLRDNORM; - } } - write_subdev = comedi_get_write_subdevice(dev_file_info); - if (write_subdev) { - poll_wait(file, &write_subdev->async->wait_head, wait); - comedi_buf_write_alloc(write_subdev->async, - write_subdev->async->prealloc_bufsz); - if (!write_subdev->busy - || !(comedi_get_subdevice_runflags(write_subdev) & - SRF_RUNNING) - || comedi_buf_write_n_allocated(write_subdev->async) >= - bytes_per_sample(write_subdev->async->subdevice)) { + + s = comedi_write_subdevice(info); + if (s && s->async) { + unsigned int bps = bytes_per_sample(s->async->subdevice); + + poll_wait(file, &s->async->wait_head, wait); + comedi_buf_write_alloc(s->async, s->async->prealloc_bufsz); + if (!s->busy || !comedi_is_subdevice_running(s) || + comedi_buf_write_n_allocated(s->async) >= bps) mask |= POLLOUT | POLLWRNORM; - } } +done: mutex_unlock(&dev->mutex); return mask; } @@ -1809,53 +1870,38 @@ static ssize_t comedi_write(struct file *file, const char __user *buf, int n, m, count = 0, retval = 0; DECLARE_WAITQUEUE(wait, current); const unsigned minor = iminor(file->f_dentry->d_inode); - struct comedi_device_file_info *dev_file_info; - struct comedi_device *dev; - dev_file_info = comedi_get_device_file_info(minor); + struct comedi_file_info *info = comedi_file_info_from_minor(minor); + struct comedi_device *dev = comedi_dev_from_file_info(info); - if (dev_file_info == NULL) - return -ENODEV; - dev = dev_file_info->device; - if (dev == NULL) + if (!dev) return -ENODEV; if (!dev->attached) { DPRINTK("no driver configured on comedi%i\n", dev->minor); - retval = -ENODEV; - goto done; + return -ENODEV; } - s = comedi_get_write_subdevice(dev_file_info); - if (s == NULL) { - retval = -EIO; - goto done; - } + s = comedi_write_subdevice(info); + if (!s || !s->async) + return -EIO; + async = s->async; - if (!nbytes) { - retval = 0; - goto done; - } - if (!s->busy) { - retval = 0; - goto done; - } - if (s->busy != file) { - retval = -EACCES; - goto done; - } + if (!s->busy || !nbytes) + return 0; + if (s->busy != file) + return -EACCES; + add_wait_queue(&async->wait_head, &wait); while (nbytes > 0 && !retval) { set_current_state(TASK_INTERRUPTIBLE); - if (!(comedi_get_subdevice_runflags(s) & SRF_RUNNING)) { + if (!comedi_is_subdevice_running(s)) { if (count == 0) { - if (comedi_get_subdevice_runflags(s) & - SRF_ERROR) { + if (comedi_is_subdevice_in_error(s)) retval = -EPIPE; - } else { + else retval = 0; - } do_become_nonbusy(dev, s); } break; @@ -1908,7 +1954,6 @@ static ssize_t comedi_write(struct file *file, const char __user *buf, set_current_state(TASK_RUNNING); remove_wait_queue(&async->wait_head, &wait); -done: return count ? count : retval; } @@ -1920,40 +1965,26 @@ static ssize_t comedi_read(struct file *file, char __user *buf, size_t nbytes, int n, m, count = 0, retval = 0; DECLARE_WAITQUEUE(wait, current); const unsigned minor = iminor(file->f_dentry->d_inode); - struct comedi_device_file_info *dev_file_info; - struct comedi_device *dev; - dev_file_info = comedi_get_device_file_info(minor); + struct comedi_file_info *info = comedi_file_info_from_minor(minor); + struct comedi_device *dev = comedi_dev_from_file_info(info); - if (dev_file_info == NULL) - return -ENODEV; - dev = dev_file_info->device; - if (dev == NULL) + if (!dev) return -ENODEV; if (!dev->attached) { DPRINTK("no driver configured on comedi%i\n", dev->minor); - retval = -ENODEV; - goto done; + return -ENODEV; } - s = comedi_get_read_subdevice(dev_file_info); - if (s == NULL) { - retval = -EIO; - goto done; - } + s = comedi_read_subdevice(info); + if (!s || !s->async) + return -EIO; + async = s->async; - if (!nbytes) { - retval = 0; - goto done; - } - if (!s->busy) { - retval = 0; - goto done; - } - if (s->busy != file) { - retval = -EACCES; - goto done; - } + if (!s->busy || !nbytes) + return 0; + if (s->busy != file) + return -EACCES; add_wait_queue(&async->wait_head, &wait); while (nbytes > 0 && !retval) { @@ -1970,14 +2001,12 @@ static ssize_t comedi_read(struct file *file, char __user *buf, size_t nbytes, n = m; if (n == 0) { - if (!(comedi_get_subdevice_runflags(s) & SRF_RUNNING)) { + if (!comedi_is_subdevice_running(s)) { do_become_nonbusy(dev, s); - if (comedi_get_subdevice_runflags(s) & - SRF_ERROR) { + if (comedi_is_subdevice_in_error(s)) retval = -EPIPE; - } else { + else retval = 0; - } break; } if (file->f_flags & O_NONBLOCK) { @@ -2015,48 +2044,22 @@ static ssize_t comedi_read(struct file *file, char __user *buf, size_t nbytes, buf += n; break; /* makes device work like a pipe */ } - if (!(comedi_get_subdevice_runflags(s) & (SRF_ERROR | SRF_RUNNING)) && + if (comedi_is_subdevice_idle(s) && async->buf_read_count - async->buf_write_count == 0) { do_become_nonbusy(dev, s); } set_current_state(TASK_RUNNING); remove_wait_queue(&async->wait_head, &wait); -done: return count ? count : retval; } -/* - This function restores a subdevice to an idle state. - */ -static void do_become_nonbusy(struct comedi_device *dev, - struct comedi_subdevice *s) -{ - struct comedi_async *async = s->async; - - comedi_set_subdevice_runflags(s, SRF_RUNNING, 0); - if (async) { - comedi_reset_async_buf(async); - async->inttrig = NULL; - kfree(async->cmd.chanlist); - async->cmd.chanlist = NULL; - } else { - dev_err(dev->class_dev, - "BUG: (?) do_become_nonbusy called with async=NULL\n"); - } - - s->busy = NULL; -} - static int comedi_open(struct inode *inode, struct file *file) { const unsigned minor = iminor(inode); - struct comedi_device_file_info *dev_file_info = - comedi_get_device_file_info(minor); - struct comedi_device *dev = - dev_file_info ? dev_file_info->device : NULL; + struct comedi_device *dev = comedi_dev_from_minor(minor); - if (dev == NULL) { + if (!dev) { DPRINTK("invalid minor number\n"); return -ENODEV; } @@ -2128,19 +2131,25 @@ ok: return 0; } +static int comedi_fasync(int fd, struct file *file, int on) +{ + const unsigned minor = iminor(file->f_dentry->d_inode); + struct comedi_device *dev = comedi_dev_from_minor(minor); + + if (!dev) + return -ENODEV; + + return fasync_helper(fd, file, on, &dev->async_queue); +} + static int comedi_close(struct inode *inode, struct file *file) { const unsigned minor = iminor(inode); + struct comedi_device *dev = comedi_dev_from_minor(minor); struct comedi_subdevice *s = NULL; int i; - struct comedi_device_file_info *dev_file_info; - struct comedi_device *dev; - dev_file_info = comedi_get_device_file_info(minor); - if (dev_file_info == NULL) - return -ENODEV; - dev = dev_file_info->device; - if (dev == NULL) + if (!dev) return -ENODEV; mutex_lock(&dev->mutex); @@ -2172,22 +2181,6 @@ static int comedi_close(struct inode *inode, struct file *file) return 0; } -static int comedi_fasync(int fd, struct file *file, int on) -{ - const unsigned minor = iminor(file->f_dentry->d_inode); - struct comedi_device_file_info *dev_file_info; - struct comedi_device *dev; - dev_file_info = comedi_get_device_file_info(minor); - - if (dev_file_info == NULL) - return -ENODEV; - dev = dev_file_info->device; - if (dev == NULL) - return -ENODEV; - - return fasync_helper(fd, file, on, &dev->async_queue); -} - static const struct file_operations comedi_fops = { .owner = THIS_MODULE, .unlocked_ioctl = comedi_unlocked_ioctl, @@ -2205,99 +2198,6 @@ static const struct file_operations comedi_fops = { static struct class *comedi_class; static struct cdev comedi_cdev; -static void comedi_cleanup_legacy_minors(void) -{ - unsigned i; - - for (i = 0; i < comedi_num_legacy_minors; i++) - comedi_free_board_minor(i); -} - -static int __init comedi_init(void) -{ - int i; - int retval; - - pr_info("comedi: version " COMEDI_RELEASE " - http://www.comedi.org\n"); - - if (comedi_num_legacy_minors < 0 || - comedi_num_legacy_minors > COMEDI_NUM_BOARD_MINORS) { - pr_err("comedi: error: invalid value for module parameter \"comedi_num_legacy_minors\". Valid values are 0 through %i.\n", - COMEDI_NUM_BOARD_MINORS); - return -EINVAL; - } - - /* - * comedi is unusable if both comedi_autoconfig and - * comedi_num_legacy_minors are zero, so we might as well adjust the - * defaults in that case - */ - if (comedi_autoconfig == 0 && comedi_num_legacy_minors == 0) - comedi_num_legacy_minors = 16; - - memset(comedi_file_info_table, 0, - sizeof(struct comedi_device_file_info *) * COMEDI_NUM_MINORS); - - retval = register_chrdev_region(MKDEV(COMEDI_MAJOR, 0), - COMEDI_NUM_MINORS, "comedi"); - if (retval) - return -EIO; - cdev_init(&comedi_cdev, &comedi_fops); - comedi_cdev.owner = THIS_MODULE; - kobject_set_name(&comedi_cdev.kobj, "comedi"); - if (cdev_add(&comedi_cdev, MKDEV(COMEDI_MAJOR, 0), COMEDI_NUM_MINORS)) { - unregister_chrdev_region(MKDEV(COMEDI_MAJOR, 0), - COMEDI_NUM_MINORS); - return -EIO; - } - comedi_class = class_create(THIS_MODULE, "comedi"); - if (IS_ERR(comedi_class)) { - pr_err("comedi: failed to create class\n"); - cdev_del(&comedi_cdev); - unregister_chrdev_region(MKDEV(COMEDI_MAJOR, 0), - COMEDI_NUM_MINORS); - return PTR_ERR(comedi_class); - } - - comedi_class->dev_attrs = comedi_dev_attrs; - - /* XXX requires /proc interface */ - comedi_proc_init(); - - /* create devices files for legacy/manual use */ - for (i = 0; i < comedi_num_legacy_minors; i++) { - int minor; - minor = comedi_alloc_board_minor(NULL); - if (minor < 0) { - comedi_cleanup_legacy_minors(); - cdev_del(&comedi_cdev); - unregister_chrdev_region(MKDEV(COMEDI_MAJOR, 0), - COMEDI_NUM_MINORS); - return minor; - } - } - - return 0; -} - -static void __exit comedi_cleanup(void) -{ - int i; - - comedi_cleanup_legacy_minors(); - for (i = 0; i < COMEDI_NUM_MINORS; ++i) - BUG_ON(comedi_file_info_table[i]); - - class_destroy(comedi_class); - cdev_del(&comedi_cdev); - unregister_chrdev_region(MKDEV(COMEDI_MAJOR, 0), COMEDI_NUM_MINORS); - - comedi_proc_cleanup(); -} - -module_init(comedi_init); -module_exit(comedi_cleanup); - void comedi_error(const struct comedi_device *dev, const char *s) { dev_err(dev->class_dev, "%s: %s\n", dev->driver->driver_name, s); @@ -2312,7 +2212,7 @@ void comedi_event(struct comedi_device *dev, struct comedi_subdevice *s) /* DPRINTK("comedi_event 0x%x\n",mask); */ - if ((comedi_get_subdevice_runflags(s) & SRF_RUNNING) == 0) + if (!comedi_is_subdevice_running(s)) return; if (s-> @@ -2347,40 +2247,9 @@ void comedi_event(struct comedi_device *dev, struct comedi_subdevice *s) } EXPORT_SYMBOL(comedi_event); -unsigned comedi_get_subdevice_runflags(struct comedi_subdevice *s) -{ - unsigned long flags; - unsigned runflags; - - spin_lock_irqsave(&s->spin_lock, flags); - runflags = s->runflags; - spin_unlock_irqrestore(&s->spin_lock, flags); - return runflags; -} -EXPORT_SYMBOL(comedi_get_subdevice_runflags); - -static int is_device_busy(struct comedi_device *dev) -{ - struct comedi_subdevice *s; - int i; - - if (!dev->attached) - return 0; - - for (i = 0; i < dev->n_subdevices; i++) { - s = &dev->subdevices[i]; - if (s->busy) - return 1; - if (s->async && s->async->mmap_count) - return 1; - } - - return 0; -} - static void comedi_device_init(struct comedi_device *dev) { - memset(dev, 0, sizeof(struct comedi_device)); + memset(dev, 0, sizeof(*dev)); spin_lock_init(&dev->spinlock); mutex_init(&dev->mutex); dev->minor = -1; @@ -2398,11 +2267,11 @@ static void comedi_device_cleanup(struct comedi_device *dev) int comedi_alloc_board_minor(struct device *hardware_device) { - struct comedi_device_file_info *info; + struct comedi_file_info *info; struct device *csdev; unsigned i; - info = kzalloc(sizeof(struct comedi_device_file_info), GFP_KERNEL); + info = kzalloc(sizeof(*info), GFP_KERNEL); if (info == NULL) return -ENOMEM; info->device = kzalloc(sizeof(struct comedi_device), GFP_KERNEL); @@ -2439,7 +2308,7 @@ int comedi_alloc_board_minor(struct device *hardware_device) void comedi_free_board_minor(unsigned minor) { - struct comedi_device_file_info *info; + struct comedi_file_info *info; BUG_ON(minor >= COMEDI_NUM_BOARD_MINORS); spin_lock(&comedi_file_info_table_lock); @@ -2464,7 +2333,7 @@ void comedi_free_board_minor(unsigned minor) int comedi_find_board_minor(struct device *hardware_device) { int minor; - struct comedi_device_file_info *info; + struct comedi_file_info *info; for (minor = 0; minor < COMEDI_NUM_BOARD_MINORS; minor++) { spin_lock(&comedi_file_info_table_lock); @@ -2478,19 +2347,21 @@ int comedi_find_board_minor(struct device *hardware_device) return -ENODEV; } -int comedi_alloc_subdevice_minor(struct comedi_device *dev, - struct comedi_subdevice *s) +int comedi_alloc_subdevice_minor(struct comedi_subdevice *s) { - struct comedi_device_file_info *info; + struct comedi_device *dev = s->device; + struct comedi_file_info *info; struct device *csdev; unsigned i; - info = kmalloc(sizeof(struct comedi_device_file_info), GFP_KERNEL); - if (info == NULL) + info = kzalloc(sizeof(*info), GFP_KERNEL); + if (!info) return -ENOMEM; info->device = dev; - info->read_subdevice = s; - info->write_subdevice = s; + if (s->subdev_flags & SDF_CMD_READ) + info->read_subdevice = s; + if (s->subdev_flags & SDF_CMD_WRITE) + info->write_subdevice = s; spin_lock(&comedi_file_info_table_lock); for (i = COMEDI_FIRST_SUBDEVICE_MINOR; i < COMEDI_NUM_MINORS; ++i) { if (comedi_file_info_table[i] == NULL) { @@ -2501,23 +2372,23 @@ int comedi_alloc_subdevice_minor(struct comedi_device *dev, spin_unlock(&comedi_file_info_table_lock); if (i == COMEDI_NUM_MINORS) { kfree(info); - pr_err("comedi: error: ran out of minor numbers for board device files.\n"); + pr_err("comedi: error: ran out of minor numbers for subdevice files.\n"); return -EBUSY; } s->minor = i; csdev = device_create(comedi_class, dev->class_dev, MKDEV(COMEDI_MAJOR, i), NULL, "comedi%i_subd%i", - dev->minor, (int)(s - dev->subdevices)); + dev->minor, s->index); if (!IS_ERR(csdev)) s->class_dev = csdev; dev_set_drvdata(csdev, info); - return i; + return 0; } void comedi_free_subdevice_minor(struct comedi_subdevice *s) { - struct comedi_device_file_info *info; + struct comedi_file_info *info; if (s == NULL) return; @@ -2539,14 +2410,90 @@ void comedi_free_subdevice_minor(struct comedi_subdevice *s) kfree(info); } -struct comedi_device_file_info *comedi_get_device_file_info(unsigned minor) +static void comedi_cleanup_board_minors(void) { - struct comedi_device_file_info *info; + unsigned i; - BUG_ON(minor >= COMEDI_NUM_MINORS); - spin_lock(&comedi_file_info_table_lock); - info = comedi_file_info_table[minor]; - spin_unlock(&comedi_file_info_table_lock); - return info; + for (i = 0; i < COMEDI_NUM_BOARD_MINORS; i++) + comedi_free_board_minor(i); +} + +static int __init comedi_init(void) +{ + int i; + int retval; + + pr_info("comedi: version " COMEDI_RELEASE " - http://www.comedi.org\n"); + + if (comedi_num_legacy_minors < 0 || + comedi_num_legacy_minors > COMEDI_NUM_BOARD_MINORS) { + pr_err("comedi: error: invalid value for module parameter \"comedi_num_legacy_minors\". Valid values are 0 through %i.\n", + COMEDI_NUM_BOARD_MINORS); + return -EINVAL; + } + + memset(comedi_file_info_table, 0, + sizeof(struct comedi_file_info *) * COMEDI_NUM_MINORS); + + retval = register_chrdev_region(MKDEV(COMEDI_MAJOR, 0), + COMEDI_NUM_MINORS, "comedi"); + if (retval) + return -EIO; + cdev_init(&comedi_cdev, &comedi_fops); + comedi_cdev.owner = THIS_MODULE; + kobject_set_name(&comedi_cdev.kobj, "comedi"); + if (cdev_add(&comedi_cdev, MKDEV(COMEDI_MAJOR, 0), COMEDI_NUM_MINORS)) { + unregister_chrdev_region(MKDEV(COMEDI_MAJOR, 0), + COMEDI_NUM_MINORS); + return -EIO; + } + comedi_class = class_create(THIS_MODULE, "comedi"); + if (IS_ERR(comedi_class)) { + pr_err("comedi: failed to create class\n"); + cdev_del(&comedi_cdev); + unregister_chrdev_region(MKDEV(COMEDI_MAJOR, 0), + COMEDI_NUM_MINORS); + return PTR_ERR(comedi_class); + } + + comedi_class->dev_attrs = comedi_dev_attrs; + + /* XXX requires /proc interface */ + comedi_proc_init(); + + /* create devices files for legacy/manual use */ + for (i = 0; i < comedi_num_legacy_minors; i++) { + int minor; + minor = comedi_alloc_board_minor(NULL); + if (minor < 0) { + comedi_cleanup_board_minors(); + cdev_del(&comedi_cdev); + unregister_chrdev_region(MKDEV(COMEDI_MAJOR, 0), + COMEDI_NUM_MINORS); + return minor; + } + } + + return 0; } -EXPORT_SYMBOL_GPL(comedi_get_device_file_info); +module_init(comedi_init); + +static void __exit comedi_cleanup(void) +{ + int i; + + comedi_cleanup_board_minors(); + for (i = 0; i < COMEDI_NUM_MINORS; ++i) + BUG_ON(comedi_file_info_table[i]); + + class_destroy(comedi_class); + cdev_del(&comedi_cdev); + unregister_chrdev_region(MKDEV(COMEDI_MAJOR, 0), COMEDI_NUM_MINORS); + + comedi_proc_cleanup(); +} +module_exit(comedi_cleanup); + +MODULE_AUTHOR("http://www.comedi.org"); +MODULE_DESCRIPTION("Comedi core module"); +MODULE_LICENSE("GPL"); |