![Alexander Beregalov](/assets/img/avatar_default.png)
Cc: David Kiliani <mail@davidkiliani.de> Signed-off-by: Alexander Beregalov <a.beregalov@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
260 lines
7.7 KiB
C
260 lines
7.7 KiB
C
/**
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* @file me1600_device.c
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*
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* @brief ME-1600 device class implementation.
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* @note Copyright (C) 2007 Meilhaus Electronic GmbH (support@meilhaus.de)
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* @author Guenter Gebhardt
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* @author Krzysztof Gantzke (k.gantzke@meilhaus.de)
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*/
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/*
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* Copyright (C) 2007 Meilhaus Electronic GmbH (support@meilhaus.de)
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*
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* This file is free software; you can redistribute it and/or modify
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* it 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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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU 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 this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#ifndef __KERNEL__
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# define __KERNEL__
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#endif
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#ifndef MODULE
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# define MODULE
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#endif
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#include <linux/module.h>
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#include <linux/pci.h>
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#include <linux/slab.h>
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#include "meids.h"
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#include "meerror.h"
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#include "mecommon.h"
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#include "meinternal.h"
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#include "medebug.h"
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#include "medevice.h"
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#include "mesubdevice.h"
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#include "me1600_device.h"
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static void me1600_set_registry(me1600_device_t *subdevice, uint32_t reg_base);
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static void me1600_destructor(struct me_device *device);
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/**
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* @brief Global variable.
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* This is working queue for runing a separate atask that will be responsible for work status (start, stop, timeouts).
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*/
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static struct workqueue_struct *me1600_workqueue;
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me_device_t *me1600_pci_constructor(struct pci_dev *pci_device)
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{
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int err;
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me1600_device_t *me1600_device;
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me_subdevice_t *subdevice;
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unsigned int chip_idx;
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int i;
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PDEBUG("executed.\n");
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// Allocate structure for device instance.
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me1600_device = kmalloc(sizeof(me1600_device_t), GFP_KERNEL);
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if (!me1600_device) {
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PERROR("Cannot get memory for device instance.\n");
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return NULL;
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}
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memset(me1600_device, 0, sizeof(me1600_device_t));
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// Initialize base class structure.
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err = me_device_pci_init((me_device_t *) me1600_device, pci_device);
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if (err) {
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kfree(me1600_device);
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PERROR("Cannot initialize device base class.\n");
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return NULL;
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}
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// Initialize spin lock .
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spin_lock_init(&me1600_device->config_regs_lock);
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spin_lock_init(&me1600_device->ao_shadows_lock);
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// Get the number of analog output subdevices.
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chip_idx =
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me1600_versions_get_device_index(me1600_device->base.info.pci.
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device_id);
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// Create shadow instance.
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me1600_device->ao_regs_shadows.count =
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me1600_versions[chip_idx].ao_chips;
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me1600_device->ao_regs_shadows.registry =
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kmalloc(me1600_versions[chip_idx].ao_chips * sizeof(unsigned long),
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GFP_KERNEL);
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me1600_set_registry(me1600_device,
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me1600_device->base.info.pci.reg_bases[2]);
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me1600_device->ao_regs_shadows.shadow =
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kmalloc(me1600_versions[chip_idx].ao_chips * sizeof(uint16_t),
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GFP_KERNEL);
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me1600_device->ao_regs_shadows.mirror =
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kmalloc(me1600_versions[chip_idx].ao_chips * sizeof(uint16_t),
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GFP_KERNEL);
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// Create subdevice instances.
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for (i = 0; i < me1600_versions[chip_idx].ao_chips; i++) {
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subdevice =
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(me_subdevice_t *) me1600_ao_constructor(me1600_device->
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base.info.pci.
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reg_bases[2], i,
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((me1600_versions
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[chip_idx].curr >
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i) ? 1 : 0),
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&me1600_device->
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config_regs_lock,
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&me1600_device->
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ao_shadows_lock,
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&me1600_device->
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ao_regs_shadows,
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me1600_workqueue);
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if (!subdevice) {
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me_device_deinit((me_device_t *) me1600_device);
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kfree(me1600_device);
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PERROR("Cannot get memory for subdevice.\n");
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return NULL;
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}
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me_slist_add_subdevice_tail(&me1600_device->base.slist,
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subdevice);
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}
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// Overwrite base class methods.
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me1600_device->base.me_device_destructor = me1600_destructor;
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return (me_device_t *) me1600_device;
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}
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EXPORT_SYMBOL(me1600_pci_constructor);
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static void me1600_destructor(struct me_device *device)
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{
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me1600_device_t *me1600_device = (me1600_device_t *) device;
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PDEBUG("executed.\n");
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// Destroy shadow instance.
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kfree(me1600_device->ao_regs_shadows.registry);
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kfree(me1600_device->ao_regs_shadows.shadow);
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kfree(me1600_device->ao_regs_shadows.mirror);
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me_device_deinit((me_device_t *) me1600_device);
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kfree(me1600_device);
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}
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static void me1600_set_registry(me1600_device_t *subdevice, uint32_t reg_base)
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{ // Create shadow structure.
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if (subdevice->ao_regs_shadows.count >= 1) {
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subdevice->ao_regs_shadows.registry[0] =
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(unsigned long)(reg_base + ME1600_CHANNEL_0_REG);
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}
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if (subdevice->ao_regs_shadows.count >= 2) {
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subdevice->ao_regs_shadows.registry[1] =
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(unsigned long)(reg_base + ME1600_CHANNEL_1_REG);
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}
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if (subdevice->ao_regs_shadows.count >= 3) {
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subdevice->ao_regs_shadows.registry[2] =
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(unsigned long)(reg_base + ME1600_CHANNEL_2_REG);
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}
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if (subdevice->ao_regs_shadows.count >= 4) {
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subdevice->ao_regs_shadows.registry[3] =
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(unsigned long)(reg_base + ME1600_CHANNEL_3_REG);
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}
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if (subdevice->ao_regs_shadows.count >= 5) {
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subdevice->ao_regs_shadows.registry[4] =
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(unsigned long)(reg_base + ME1600_CHANNEL_4_REG);
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}
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if (subdevice->ao_regs_shadows.count >= 6) {
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subdevice->ao_regs_shadows.registry[5] =
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(unsigned long)(reg_base + ME1600_CHANNEL_5_REG);
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}
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if (subdevice->ao_regs_shadows.count >= 7) {
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subdevice->ao_regs_shadows.registry[6] =
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(unsigned long)(reg_base + ME1600_CHANNEL_6_REG);
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}
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if (subdevice->ao_regs_shadows.count >= 8) {
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subdevice->ao_regs_shadows.registry[7] =
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(unsigned long)(reg_base + ME1600_CHANNEL_7_REG);
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}
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if (subdevice->ao_regs_shadows.count >= 9) {
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subdevice->ao_regs_shadows.registry[8] =
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(unsigned long)(reg_base + ME1600_CHANNEL_8_REG);
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}
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if (subdevice->ao_regs_shadows.count >= 10) {
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subdevice->ao_regs_shadows.registry[9] =
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(unsigned long)(reg_base + ME1600_CHANNEL_9_REG);
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}
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if (subdevice->ao_regs_shadows.count >= 11) {
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subdevice->ao_regs_shadows.registry[10] =
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(unsigned long)(reg_base + ME1600_CHANNEL_10_REG);
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}
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if (subdevice->ao_regs_shadows.count >= 12) {
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subdevice->ao_regs_shadows.registry[11] =
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(unsigned long)(reg_base + ME1600_CHANNEL_11_REG);
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}
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if (subdevice->ao_regs_shadows.count >= 13) {
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subdevice->ao_regs_shadows.registry[12] =
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(unsigned long)(reg_base + ME1600_CHANNEL_12_REG);
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}
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if (subdevice->ao_regs_shadows.count >= 14) {
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subdevice->ao_regs_shadows.registry[13] =
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(unsigned long)(reg_base + ME1600_CHANNEL_13_REG);
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}
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if (subdevice->ao_regs_shadows.count >= 15) {
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subdevice->ao_regs_shadows.registry[14] =
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(unsigned long)(reg_base + ME1600_CHANNEL_14_REG);
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}
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if (subdevice->ao_regs_shadows.count >= 16) {
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subdevice->ao_regs_shadows.registry[15] =
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(unsigned long)(reg_base + ME1600_CHANNEL_15_REG);
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}
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if (subdevice->ao_regs_shadows.count > 16) {
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PERROR("More than 16 outputs! (%d)\n",
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subdevice->ao_regs_shadows.count);
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}
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}
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// Init and exit of module.
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static int __init me1600_init(void)
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{
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PDEBUG("executed\n.");
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me1600_workqueue = create_singlethread_workqueue("me1600");
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return 0;
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}
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static void __exit me1600_exit(void)
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{
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PDEBUG("executed\n.");
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flush_workqueue(me1600_workqueue);
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destroy_workqueue(me1600_workqueue);
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}
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module_init(me1600_init);
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module_exit(me1600_exit);
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// Administrative stuff for modinfo.
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MODULE_AUTHOR
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("Guenter Gebhardt <g.gebhardt@meilhaus.de> & Krzysztof Gantzke <k.gantzke@meilhaus.de>");
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MODULE_DESCRIPTION("Device Driver Module for ME-1600 Device");
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MODULE_SUPPORTED_DEVICE("Meilhaus ME-1600 Devices");
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MODULE_LICENSE("GPL");
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