diff options
Diffstat (limited to 'drivers/staging/meilhaus/me1600_device.c')
| -rw-r--r-- | drivers/staging/meilhaus/me1600_device.c | 261 |
1 files changed, 261 insertions, 0 deletions
diff --git a/drivers/staging/meilhaus/me1600_device.c b/drivers/staging/meilhaus/me1600_device.c new file mode 100644 index 000000000000..3bc2cb1dc869 --- /dev/null +++ b/drivers/staging/meilhaus/me1600_device.c @@ -0,0 +1,261 @@ +/** + * @file me1600_device.c + * + * @brief ME-1600 device class implementation. + * @note Copyright (C) 2007 Meilhaus Electronic GmbH (support@meilhaus.de) + * @author Guenter Gebhardt + * @author Krzysztof Gantzke (k.gantzke@meilhaus.de) + */ + +/* + * 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 + +#ifndef MODULE +# define MODULE +#endif + +#include <linux/module.h> + +#include <linux/pci.h> +#include <linux/slab.h> + +#include "meids.h" +#include "meerror.h" +#include "mecommon.h" +#include "meinternal.h" + +#include "medebug.h" +#include "medevice.h" +#include "mesubdevice.h" +#include "me1600_device.h" + +static void me1600_set_registry(me1600_device_t * subdevice, uint32_t reg_base); +static void me1600_destructor(struct me_device *device); + +/** + * @brief Global variable. + * This is working queue for runing a separate atask that will be responsible for work status (start, stop, timeouts). + */ +static struct workqueue_struct *me1600_workqueue; + +me_device_t *me1600_pci_constructor(struct pci_dev *pci_device) +{ + int err; + me1600_device_t *me1600_device; + me_subdevice_t *subdevice; + unsigned int chip_idx; + int i; + + PDEBUG("executed.\n"); + + // Allocate structure for device instance. + me1600_device = kmalloc(sizeof(me1600_device_t), GFP_KERNEL); + + if (!me1600_device) { + PERROR("Cannot get memory for device instance.\n"); + return NULL; + } + + memset(me1600_device, 0, sizeof(me1600_device_t)); + + // Initialize base class structure. + err = me_device_pci_init((me_device_t *) me1600_device, pci_device); + + if (err) { + kfree(me1600_device); + PERROR("Cannot initialize device base class.\n"); + return NULL; + } + // Initialize spin lock . + spin_lock_init(&me1600_device->config_regs_lock); + spin_lock_init(&me1600_device->ao_shadows_lock); + + // Get the number of analog output subdevices. + chip_idx = + me1600_versions_get_device_index(me1600_device->base.info.pci. + device_id); + + // Create shadow instance. + me1600_device->ao_regs_shadows.count = + me1600_versions[chip_idx].ao_chips; + me1600_device->ao_regs_shadows.registry = + kmalloc(me1600_versions[chip_idx].ao_chips * sizeof(unsigned long), + GFP_KERNEL); + me1600_set_registry(me1600_device, + me1600_device->base.info.pci.reg_bases[2]); + me1600_device->ao_regs_shadows.shadow = + kmalloc(me1600_versions[chip_idx].ao_chips * sizeof(uint16_t), + GFP_KERNEL); + me1600_device->ao_regs_shadows.mirror = + kmalloc(me1600_versions[chip_idx].ao_chips * sizeof(uint16_t), + GFP_KERNEL); + + // Create subdevice instances. + for (i = 0; i < me1600_versions[chip_idx].ao_chips; i++) { + subdevice = + (me_subdevice_t *) me1600_ao_constructor(me1600_device-> + base.info.pci. + reg_bases[2], i, + ((me1600_versions + [chip_idx].curr > + i) ? 1 : 0), + &me1600_device-> + config_regs_lock, + &me1600_device-> + ao_shadows_lock, + &me1600_device-> + ao_regs_shadows, + me1600_workqueue); + + if (!subdevice) { + me_device_deinit((me_device_t *) me1600_device); + kfree(me1600_device); + PERROR("Cannot get memory for subdevice.\n"); + return NULL; + } + + me_slist_add_subdevice_tail(&me1600_device->base.slist, + subdevice); + } + + // Overwrite base class methods. + me1600_device->base.me_device_destructor = me1600_destructor; + + return (me_device_t *) me1600_device; +} + +static void me1600_destructor(struct me_device *device) +{ + me1600_device_t *me1600_device = (me1600_device_t *) device; + PDEBUG("executed.\n"); + + // Destroy shadow instance. + kfree(me1600_device->ao_regs_shadows.registry); + kfree(me1600_device->ao_regs_shadows.shadow); + kfree(me1600_device->ao_regs_shadows.mirror); + + me_device_deinit((me_device_t *) me1600_device); + kfree(me1600_device); +} + +static void me1600_set_registry(me1600_device_t * subdevice, uint32_t reg_base) +{ // Create shadow structure. + if (subdevice->ao_regs_shadows.count >= 1) { + subdevice->ao_regs_shadows.registry[0] = + (unsigned long)(reg_base + ME1600_CHANNEL_0_REG); + } + if (subdevice->ao_regs_shadows.count >= 2) { + subdevice->ao_regs_shadows.registry[1] = + (unsigned long)(reg_base + ME1600_CHANNEL_1_REG); + } + if (subdevice->ao_regs_shadows.count >= 3) { + subdevice->ao_regs_shadows.registry[2] = + (unsigned long)(reg_base + ME1600_CHANNEL_2_REG); + } + if (subdevice->ao_regs_shadows.count >= 4) { + subdevice->ao_regs_shadows.registry[3] = + (unsigned long)(reg_base + ME1600_CHANNEL_3_REG); + } + if (subdevice->ao_regs_shadows.count >= 5) { + subdevice->ao_regs_shadows.registry[4] = + (unsigned long)(reg_base + ME1600_CHANNEL_4_REG); + } + if (subdevice->ao_regs_shadows.count >= 6) { + subdevice->ao_regs_shadows.registry[5] = + (unsigned long)(reg_base + ME1600_CHANNEL_5_REG); + } + if (subdevice->ao_regs_shadows.count >= 7) { + subdevice->ao_regs_shadows.registry[6] = + (unsigned long)(reg_base + ME1600_CHANNEL_6_REG); + } + if (subdevice->ao_regs_shadows.count >= 8) { + subdevice->ao_regs_shadows.registry[7] = + (unsigned long)(reg_base + ME1600_CHANNEL_7_REG); + } + if (subdevice->ao_regs_shadows.count >= 9) { + subdevice->ao_regs_shadows.registry[8] = + (unsigned long)(reg_base + ME1600_CHANNEL_8_REG); + } + if (subdevice->ao_regs_shadows.count >= 10) { + subdevice->ao_regs_shadows.registry[9] = + (unsigned long)(reg_base + ME1600_CHANNEL_9_REG); + } + if (subdevice->ao_regs_shadows.count >= 11) { + subdevice->ao_regs_shadows.registry[10] = + (unsigned long)(reg_base + ME1600_CHANNEL_10_REG); + } + if (subdevice->ao_regs_shadows.count >= 12) { + subdevice->ao_regs_shadows.registry[11] = + (unsigned long)(reg_base + ME1600_CHANNEL_11_REG); + } + if (subdevice->ao_regs_shadows.count >= 13) { + subdevice->ao_regs_shadows.registry[12] = + (unsigned long)(reg_base + ME1600_CHANNEL_12_REG); + } + if (subdevice->ao_regs_shadows.count >= 14) { + subdevice->ao_regs_shadows.registry[13] = + (unsigned long)(reg_base + ME1600_CHANNEL_13_REG); + } + if (subdevice->ao_regs_shadows.count >= 15) { + subdevice->ao_regs_shadows.registry[14] = + (unsigned long)(reg_base + ME1600_CHANNEL_14_REG); + } + if (subdevice->ao_regs_shadows.count >= 16) { + subdevice->ao_regs_shadows.registry[15] = + (unsigned long)(reg_base + ME1600_CHANNEL_15_REG); + } + if (subdevice->ao_regs_shadows.count > 16) { + PERROR("More than 16 outputs! (%d)\n", + subdevice->ao_regs_shadows.count); + } +} + +// Init and exit of module. + +static int __init me1600_init(void) +{ + PDEBUG("executed\n."); + + me1600_workqueue = create_singlethread_workqueue("me1600"); + return 0; +} + +static void __exit me1600_exit(void) +{ + PDEBUG("executed\n."); + + flush_workqueue(me1600_workqueue); + destroy_workqueue(me1600_workqueue); +} + +module_init(me1600_init); +module_exit(me1600_exit); + +// Administrative stuff for modinfo. +MODULE_AUTHOR + ("Guenter Gebhardt <g.gebhardt@meilhaus.de> & Krzysztof Gantzke <k.gantzke@meilhaus.de>"); +MODULE_DESCRIPTION("Device Driver Module for ME-1600 Device"); +MODULE_SUPPORTED_DEVICE("Meilhaus ME-1600 Devices"); +MODULE_LICENSE("GPL"); + +// Export the constructor. +EXPORT_SYMBOL(me1600_pci_constructor); |