| /** |
| * @file metempl_sub.c |
| * |
| * @brief Subdevice instance. |
| * @note Copyright (C) 2007 Meilhaus Electronic GmbH (support@meilhaus.de) |
| * @author Guenter Gebhardt |
| */ |
| |
| /* |
| * Copyright (C) 2007 Meilhaus Electronic GmbH (support@meilhaus.de) |
| * |
| * This file is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2 of the License, or |
| * (at your option) any later version. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write to the Free Software |
| * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
| */ |
| |
| #ifndef __KERNEL__ |
| # define __KERNEL__ |
| #endif |
| |
| /* |
| * Includes |
| */ |
| #include <linux/module.h> |
| |
| #include <linux/slab.h> |
| #include <linux/spinlock.h> |
| #include <asm/io.h> |
| #include <linux/types.h> |
| |
| #include "medefines.h" |
| #include "meinternal.h" |
| #include "meerror.h" |
| |
| #include "medebug.h" |
| #include "metempl_sub_reg.h" |
| #include "metempl_sub.h" |
| |
| /* |
| * Defines |
| */ |
| |
| /* |
| * Functions |
| */ |
| |
| static void metempl_sub_destructor(struct me_subdevice *subdevice) |
| { |
| metempl_sub_subdevice_t *instance; |
| |
| PDEBUG("executed.\n"); |
| instance = (metempl_sub_subdevice_t *) subdevice; |
| |
| /* Until there this was the things the default constructor does. |
| If you do not have any additional things to do you can wipe it out. */ |
| |
| me_subdevice_deinit(&instance->base); |
| kfree(instance); |
| } |
| |
| static int metempl_sub_query_number_channels(me_subdevice_t * subdevice, |
| int *number) |
| { |
| PDEBUG("executed.\n"); |
| *number = 0; |
| return ME_ERRNO_SUCCESS; |
| } |
| |
| static int metempl_sub_query_subdevice_type(me_subdevice_t * subdevice, |
| int *type, int *subtype) |
| { |
| PDEBUG("executed.\n"); |
| *type = 0; |
| *subtype = 0; |
| return ME_ERRNO_SUCCESS; |
| } |
| |
| static int metempl_sub_query_subdevice_caps(me_subdevice_t * subdevice, |
| int *caps) |
| { |
| PDEBUG("executed.\n"); |
| *caps = 0; |
| return ME_ERRNO_SUCCESS; |
| } |
| |
| metempl_sub_subdevice_t *metempl_sub_constructor(uint32_t reg_base, |
| unsigned int sub_idx, |
| spinlock_t * ctrl_reg_lock) |
| { |
| metempl_sub_subdevice_t *subdevice; |
| int err; |
| |
| PDEBUG("executed.\n"); |
| |
| /* Allocate memory for subdevice instance */ |
| subdevice = kmalloc(sizeof(metempl_sub_subdevice_t), GFP_KERNEL); |
| |
| if (!subdevice) { |
| PERROR("Cannot get memory for subdevice instance.\n"); |
| return NULL; |
| } |
| |
| memset(subdevice, 0, sizeof(metempl_sub_subdevice_t)); |
| |
| /* Check if subdevice index is out of range */ |
| |
| if (sub_idx >= 2) { |
| PERROR("Template subdevice index is out of range.\n"); |
| kfree(subdevice); |
| return NULL; |
| } |
| |
| /* Initialize subdevice base class */ |
| err = me_subdevice_init(&subdevice->base); |
| |
| if (err) { |
| PERROR("Cannot initialize subdevice base class instance.\n"); |
| kfree(subdevice); |
| return NULL; |
| } |
| // Initialize spin locks. |
| spin_lock_init(&subdevice->subdevice_lock); |
| |
| subdevice->ctrl_reg_lock = ctrl_reg_lock; |
| |
| /* Save the subdevice index */ |
| subdevice->sub_idx = sub_idx; |
| |
| /* Override base class methods. */ |
| subdevice->base.me_subdevice_destructor = metempl_sub_destructor; |
| subdevice->base.me_subdevice_query_number_channels = |
| metempl_sub_query_number_channels; |
| subdevice->base.me_subdevice_query_subdevice_type = |
| metempl_sub_query_subdevice_type; |
| subdevice->base.me_subdevice_query_subdevice_caps = |
| metempl_sub_query_subdevice_caps; |
| |
| return subdevice; |
| } |