staging: comedi: drivers (core): remove forward declarations
Move a couple of the functions to avoid the need for the forward declarations. Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com> Cc: Ian Abbott <abbotti@mev.co.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
H Hartley Sweeten
Greg Kroah-Hartman
Родитель
5b6cbd87d3
Коммит
01fca37863
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@ -45,14 +45,6 @@
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#include "comedidev.h"
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#include "comedi_internal.h"
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static int postconfig(struct comedi_device *dev);
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static int insn_rw_emulate_bits(struct comedi_device *dev,
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struct comedi_subdevice *s,
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struct comedi_insn *insn, unsigned int *data);
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static void *comedi_recognize(struct comedi_driver *driv, const char *name);
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static void comedi_report_boards(struct comedi_driver *driv);
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static int poll_invalid(struct comedi_device *dev, struct comedi_subdevice *s);
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struct comedi_driver *comedi_drivers;
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int comedi_alloc_subdevices(struct comedi_device *dev, int num_subdevices)
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@ -131,6 +123,133 @@ void comedi_device_detach(struct comedi_device *dev)
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__comedi_device_detach(dev);
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}
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static int poll_invalid(struct comedi_device *dev, struct comedi_subdevice *s)
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{
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return -EINVAL;
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}
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int insn_inval(struct comedi_device *dev, struct comedi_subdevice *s,
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struct comedi_insn *insn, unsigned int *data)
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{
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return -EINVAL;
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}
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static int insn_rw_emulate_bits(struct comedi_device *dev,
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struct comedi_subdevice *s,
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struct comedi_insn *insn, unsigned int *data)
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{
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struct comedi_insn new_insn;
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int ret;
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static const unsigned channels_per_bitfield = 32;
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unsigned chan = CR_CHAN(insn->chanspec);
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const unsigned base_bitfield_channel =
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(chan < channels_per_bitfield) ? 0 : chan;
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unsigned int new_data[2];
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memset(new_data, 0, sizeof(new_data));
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memset(&new_insn, 0, sizeof(new_insn));
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new_insn.insn = INSN_BITS;
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new_insn.chanspec = base_bitfield_channel;
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new_insn.n = 2;
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new_insn.subdev = insn->subdev;
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if (insn->insn == INSN_WRITE) {
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if (!(s->subdev_flags & SDF_WRITABLE))
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return -EINVAL;
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new_data[0] = 1 << (chan - base_bitfield_channel); /* mask */
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new_data[1] = data[0] ? (1 << (chan - base_bitfield_channel))
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: 0; /* bits */
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}
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ret = s->insn_bits(dev, s, &new_insn, new_data);
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if (ret < 0)
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return ret;
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if (insn->insn == INSN_READ)
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data[0] = (new_data[1] >> (chan - base_bitfield_channel)) & 1;
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return 1;
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}
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static int postconfig(struct comedi_device *dev)
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{
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int i;
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struct comedi_subdevice *s;
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struct comedi_async *async = NULL;
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int ret;
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for (i = 0; i < dev->n_subdevices; i++) {
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s = &dev->subdevices[i];
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if (s->type == COMEDI_SUBD_UNUSED)
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continue;
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if (s->len_chanlist == 0)
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s->len_chanlist = 1;
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if (s->do_cmd) {
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unsigned int buf_size;
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BUG_ON((s->subdev_flags & (SDF_CMD_READ |
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SDF_CMD_WRITE)) == 0);
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BUG_ON(!s->do_cmdtest);
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async =
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kzalloc(sizeof(struct comedi_async), GFP_KERNEL);
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if (async == NULL) {
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dev_warn(dev->class_dev,
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"failed to allocate async struct\n");
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return -ENOMEM;
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}
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init_waitqueue_head(&async->wait_head);
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async->subdevice = s;
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s->async = async;
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async->max_bufsize =
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comedi_default_buf_maxsize_kb * 1024;
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buf_size = comedi_default_buf_size_kb * 1024;
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if (buf_size > async->max_bufsize)
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buf_size = async->max_bufsize;
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async->prealloc_buf = NULL;
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async->prealloc_bufsz = 0;
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if (comedi_buf_alloc(dev, s, buf_size) < 0) {
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dev_warn(dev->class_dev,
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"Buffer allocation failed\n");
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return -ENOMEM;
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}
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if (s->buf_change) {
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ret = s->buf_change(dev, s, buf_size);
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if (ret < 0)
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return ret;
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}
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comedi_alloc_subdevice_minor(dev, s);
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}
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if (!s->range_table && !s->range_table_list)
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s->range_table = &range_unknown;
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if (!s->insn_read && s->insn_bits)
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s->insn_read = insn_rw_emulate_bits;
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if (!s->insn_write && s->insn_bits)
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s->insn_write = insn_rw_emulate_bits;
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if (!s->insn_read)
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s->insn_read = insn_inval;
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if (!s->insn_write)
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s->insn_write = insn_inval;
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if (!s->insn_bits)
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s->insn_bits = insn_inval;
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if (!s->insn_config)
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s->insn_config = insn_inval;
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if (!s->poll)
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s->poll = poll_invalid;
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}
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return 0;
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}
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/* do a little post-config cleanup */
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/* called with module refcount incremented, decrements it */
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static int comedi_device_postconfig(struct comedi_device *dev)
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@ -150,6 +269,64 @@ static int comedi_device_postconfig(struct comedi_device *dev)
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return 0;
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}
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/*
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* Generic recognize function for drivers that register their supported
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* board names.
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*
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* 'driv->board_name' points to a 'const char *' member within the
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* zeroth element of an array of some private board information
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* structure, say 'struct foo_board' containing a member 'const char
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* *board_name' that is initialized to point to a board name string that
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* is one of the candidates matched against this function's 'name'
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* parameter.
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*
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* 'driv->offset' is the size of the private board information
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* structure, say 'sizeof(struct foo_board)', and 'driv->num_names' is
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* the length of the array of private board information structures.
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*
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* If one of the board names in the array of private board information
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* structures matches the name supplied to this function, the function
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* returns a pointer to the pointer to the board name, otherwise it
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* returns NULL. The return value ends up in the 'board_ptr' member of
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* a 'struct comedi_device' that the low-level comedi driver's
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* 'attach()' hook can convert to a point to a particular element of its
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* array of private board information structures by subtracting the
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* offset of the member that points to the board name. (No subtraction
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* is required if the board name pointer is the first member of the
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* private board information structure, which is generally the case.)
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*/
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static void *comedi_recognize(struct comedi_driver *driv, const char *name)
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{
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char **name_ptr = (char **)driv->board_name;
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int i;
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for (i = 0; i < driv->num_names; i++) {
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if (strcmp(*name_ptr, name) == 0)
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return name_ptr;
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name_ptr = (void *)name_ptr + driv->offset;
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}
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return NULL;
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}
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static void comedi_report_boards(struct comedi_driver *driv)
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{
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unsigned int i;
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const char *const *name_ptr;
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pr_info("comedi: valid board names for %s driver are:\n",
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driv->driver_name);
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name_ptr = driv->board_name;
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for (i = 0; i < driv->num_names; i++) {
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pr_info(" %s\n", *name_ptr);
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name_ptr = (const char **)((char *)name_ptr + driv->offset);
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}
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if (driv->num_names == 0)
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pr_info(" %s\n", driv->driver_name);
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}
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int comedi_device_attach(struct comedi_device *dev, struct comedi_devconfig *it)
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{
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struct comedi_driver *driv;
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@ -247,191 +424,6 @@ int comedi_driver_unregister(struct comedi_driver *driver)
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}
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EXPORT_SYMBOL(comedi_driver_unregister);
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static int postconfig(struct comedi_device *dev)
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{
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int i;
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struct comedi_subdevice *s;
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struct comedi_async *async = NULL;
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int ret;
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for (i = 0; i < dev->n_subdevices; i++) {
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s = &dev->subdevices[i];
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if (s->type == COMEDI_SUBD_UNUSED)
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continue;
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if (s->len_chanlist == 0)
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s->len_chanlist = 1;
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if (s->do_cmd) {
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unsigned int buf_size;
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BUG_ON((s->subdev_flags & (SDF_CMD_READ |
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SDF_CMD_WRITE)) == 0);
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BUG_ON(!s->do_cmdtest);
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async =
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kzalloc(sizeof(struct comedi_async), GFP_KERNEL);
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if (async == NULL) {
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dev_warn(dev->class_dev,
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"failed to allocate async struct\n");
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return -ENOMEM;
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}
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init_waitqueue_head(&async->wait_head);
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async->subdevice = s;
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s->async = async;
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async->max_bufsize =
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comedi_default_buf_maxsize_kb * 1024;
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buf_size = comedi_default_buf_size_kb * 1024;
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if (buf_size > async->max_bufsize)
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buf_size = async->max_bufsize;
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async->prealloc_buf = NULL;
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async->prealloc_bufsz = 0;
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if (comedi_buf_alloc(dev, s, buf_size) < 0) {
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dev_warn(dev->class_dev,
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"Buffer allocation failed\n");
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return -ENOMEM;
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}
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if (s->buf_change) {
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ret = s->buf_change(dev, s, buf_size);
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if (ret < 0)
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return ret;
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}
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comedi_alloc_subdevice_minor(dev, s);
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}
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if (!s->range_table && !s->range_table_list)
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s->range_table = &range_unknown;
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if (!s->insn_read && s->insn_bits)
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s->insn_read = insn_rw_emulate_bits;
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if (!s->insn_write && s->insn_bits)
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s->insn_write = insn_rw_emulate_bits;
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if (!s->insn_read)
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s->insn_read = insn_inval;
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if (!s->insn_write)
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s->insn_write = insn_inval;
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if (!s->insn_bits)
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s->insn_bits = insn_inval;
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if (!s->insn_config)
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s->insn_config = insn_inval;
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if (!s->poll)
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s->poll = poll_invalid;
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}
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return 0;
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}
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/*
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* Generic recognize function for drivers that register their supported
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* board names.
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*
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* 'driv->board_name' points to a 'const char *' member within the
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* zeroth element of an array of some private board information
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* structure, say 'struct foo_board' containing a member 'const char
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* *board_name' that is initialized to point to a board name string that
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* is one of the candidates matched against this function's 'name'
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* parameter.
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*
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* 'driv->offset' is the size of the private board information
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* structure, say 'sizeof(struct foo_board)', and 'driv->num_names' is
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* the length of the array of private board information structures.
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*
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* If one of the board names in the array of private board information
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* structures matches the name supplied to this function, the function
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* returns a pointer to the pointer to the board name, otherwise it
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* returns NULL. The return value ends up in the 'board_ptr' member of
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* a 'struct comedi_device' that the low-level comedi driver's
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* 'attach()' hook can convert to a point to a particular element of its
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* array of private board information structures by subtracting the
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* offset of the member that points to the board name. (No subtraction
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* is required if the board name pointer is the first member of the
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* private board information structure, which is generally the case.)
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*/
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static void *comedi_recognize(struct comedi_driver *driv, const char *name)
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{
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char **name_ptr = (char **)driv->board_name;
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int i;
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for (i = 0; i < driv->num_names; i++) {
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if (strcmp(*name_ptr, name) == 0)
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return name_ptr;
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name_ptr = (void *)name_ptr + driv->offset;
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}
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return NULL;
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}
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static void comedi_report_boards(struct comedi_driver *driv)
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{
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unsigned int i;
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const char *const *name_ptr;
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pr_info("comedi: valid board names for %s driver are:\n",
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driv->driver_name);
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name_ptr = driv->board_name;
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for (i = 0; i < driv->num_names; i++) {
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pr_info(" %s\n", *name_ptr);
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name_ptr = (const char **)((char *)name_ptr + driv->offset);
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}
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if (driv->num_names == 0)
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pr_info(" %s\n", driv->driver_name);
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}
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static int poll_invalid(struct comedi_device *dev, struct comedi_subdevice *s)
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{
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return -EINVAL;
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}
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int insn_inval(struct comedi_device *dev, struct comedi_subdevice *s,
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struct comedi_insn *insn, unsigned int *data)
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{
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return -EINVAL;
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}
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static int insn_rw_emulate_bits(struct comedi_device *dev,
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struct comedi_subdevice *s,
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struct comedi_insn *insn, unsigned int *data)
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{
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struct comedi_insn new_insn;
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int ret;
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static const unsigned channels_per_bitfield = 32;
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unsigned chan = CR_CHAN(insn->chanspec);
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const unsigned base_bitfield_channel =
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(chan < channels_per_bitfield) ? 0 : chan;
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unsigned int new_data[2];
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memset(new_data, 0, sizeof(new_data));
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memset(&new_insn, 0, sizeof(new_insn));
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new_insn.insn = INSN_BITS;
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new_insn.chanspec = base_bitfield_channel;
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new_insn.n = 2;
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new_insn.subdev = insn->subdev;
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if (insn->insn == INSN_WRITE) {
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if (!(s->subdev_flags & SDF_WRITABLE))
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return -EINVAL;
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new_data[0] = 1 << (chan - base_bitfield_channel); /* mask */
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new_data[1] = data[0] ? (1 << (chan - base_bitfield_channel))
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: 0; /* bits */
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}
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ret = s->insn_bits(dev, s, &new_insn, new_data);
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if (ret < 0)
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return ret;
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if (insn->insn == INSN_READ)
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data[0] = (new_data[1] >> (chan - base_bitfield_channel)) & 1;
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return 1;
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}
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int comedi_auto_config(struct device *hardware_device,
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struct comedi_driver *driver, unsigned long context)
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{
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