/**
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* @file
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* Analogy for Linux, subdevice related features
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*
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* Copyright (C) 1997-2000 David A. Schleef <ds@schleef.org>
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* Copyright (C) 2008 Alexis Berlemont <alexis.berlemont@free.fr>
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*
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* Xenomai is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* Xenomai is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with Xenomai; if not, write to the Free Software Foundation,
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* Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#ifndef _COBALT_RTDM_ANALOGY_SUBDEVICE_H
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#define _COBALT_RTDM_ANALOGY_SUBDEVICE_H
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#include <linux/list.h>
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#include <rtdm/analogy/instruction.h>
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#include <rtdm/analogy/command.h>
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#include <rtdm/analogy/channel_range.h>
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/* --- Subdevice descriptor structure --- */
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struct a4l_device;
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struct a4l_buffer;
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/*!
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* @brief Structure describing the subdevice
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* @see a4l_add_subd()
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*/
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struct a4l_subdevice {
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struct list_head list;
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/**< List stuff */
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struct a4l_device *dev;
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/**< Containing device */
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unsigned int idx;
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/**< Subdevice index */
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struct a4l_buffer *buf;
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/**< Linked buffer */
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/* Subdevice's status (busy, linked?) */
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unsigned long status;
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/**< Subdevice's status */
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/* Descriptors stuff */
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unsigned long flags;
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/**< Type flags */
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struct a4l_channels_desc *chan_desc;
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/**< Tab of channels descriptors pointers */
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struct a4l_rngdesc *rng_desc;
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/**< Tab of ranges descriptors pointers */
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struct a4l_cmd_desc *cmd_mask;
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/**< Command capabilities mask */
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/* Functions stuff */
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int (*insn_read) (struct a4l_subdevice *, struct a4l_kernel_instruction *);
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/**< Callback for the instruction "read" */
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int (*insn_write) (struct a4l_subdevice *, struct a4l_kernel_instruction *);
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/**< Callback for the instruction "write" */
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int (*insn_bits) (struct a4l_subdevice *, struct a4l_kernel_instruction *);
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/**< Callback for the instruction "bits" */
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int (*insn_config) (struct a4l_subdevice *, struct a4l_kernel_instruction *);
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/**< Callback for the configuration instruction */
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int (*do_cmd) (struct a4l_subdevice *, struct a4l_cmd_desc *);
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/**< Callback for command handling */
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int (*do_cmdtest) (struct a4l_subdevice *, struct a4l_cmd_desc *);
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/**< Callback for command checking */
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void (*cancel) (struct a4l_subdevice *);
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/**< Callback for asynchronous transfer cancellation */
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void (*munge) (struct a4l_subdevice *, void *, unsigned long);
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/**< Callback for munge operation */
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int (*trigger) (struct a4l_subdevice *, lsampl_t);
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/**< Callback for trigger operation */
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char priv[0];
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/**< Private data */
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};
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/* --- Subdevice related functions and macros --- */
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struct a4l_channel *a4l_get_chfeat(struct a4l_subdevice * sb, int idx);
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struct a4l_range *a4l_get_rngfeat(struct a4l_subdevice * sb, int chidx, int rngidx);
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int a4l_check_chanlist(struct a4l_subdevice * subd,
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unsigned char nb_chan, unsigned int *chans);
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#define a4l_subd_is_input(x) ((A4L_SUBD_MASK_READ & (x)->flags) != 0)
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/* The following macro considers that a DIO subdevice is firstly an
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output subdevice */
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#define a4l_subd_is_output(x) \
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((A4L_SUBD_MASK_WRITE & (x)->flags) != 0 || \
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(A4L_SUBD_DIO & (x)->flags) != 0)
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/* --- Upper layer functions --- */
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struct a4l_subdevice * a4l_get_subd(struct a4l_device *dev, int idx);
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struct a4l_subdevice * a4l_alloc_subd(int sizeof_priv,
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void (*setup)(struct a4l_subdevice *));
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int a4l_add_subd(struct a4l_device *dev, struct a4l_subdevice * subd);
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int a4l_ioctl_subdinfo(struct a4l_device_context * cxt, void *arg);
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int a4l_ioctl_chaninfo(struct a4l_device_context * cxt, void *arg);
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int a4l_ioctl_rnginfo(struct a4l_device_context * cxt, void *arg);
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int a4l_ioctl_nbchaninfo(struct a4l_device_context * cxt, void *arg);
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int a4l_ioctl_nbrnginfo(struct a4l_device_context * cxt, void *arg);
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#endif /* !_COBALT_RTDM_ANALOGY_SUBDEVICE_H */
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