diff options
Diffstat (limited to 'drivers/staging/meilhaus/me6000_device.c')
| -rw-r--r-- | drivers/staging/meilhaus/me6000_device.c | 211 |
1 files changed, 211 insertions, 0 deletions
diff --git a/drivers/staging/meilhaus/me6000_device.c b/drivers/staging/meilhaus/me6000_device.c new file mode 100644 index 000000000000..fee4c58b8464 --- /dev/null +++ b/drivers/staging/meilhaus/me6000_device.c @@ -0,0 +1,211 @@ +/** + * @file me6000_device.c + * + * @brief Device class template 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 "mefirmware.h" + +#include "mesubdevice.h" +#include "medebug.h" +#include "medevice.h" +#include "me6000_reg.h" +#include "me6000_device.h" +#include "meplx_reg.h" +#include "me6000_dio.h" +#include "me6000_ao.h" + +/** + * @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 *me6000_workqueue; + +me_device_t *me6000_pci_constructor(struct pci_dev *pci_device) +{ + me6000_device_t *me6000_device; + me_subdevice_t *subdevice; + unsigned int version_idx; + int err; + int i; + int high_range = 0; + int fifo; + + PDEBUG("executed.\n"); + + // Allocate structure for device instance. + me6000_device = kmalloc(sizeof(me6000_device_t), GFP_KERNEL); + + if (!me6000_device) { + PERROR("Cannot get memory for device instance.\n"); + return NULL; + } + + memset(me6000_device, 0, sizeof(me6000_device_t)); + + // Initialize base class structure. + err = me_device_pci_init((me_device_t *) me6000_device, pci_device); + + if (err) { + kfree(me6000_device); + PERROR("Cannot initialize device base class.\n"); + return NULL; + } + + /* Download the xilinx firmware */ + err = me_xilinx_download(me6000_device->base.info.pci.reg_bases[1], + me6000_device->base.info.pci.reg_bases[2], + &pci_device->dev, "me6000.bin"); + + if (err) { + me_device_deinit((me_device_t *) me6000_device); + kfree(me6000_device); + PERROR("Can't download firmware.\n"); + return NULL; + } + + /* Get the index in the device version information table. */ + version_idx = + me6000_versions_get_device_index(me6000_device->base.info.pci. + device_id); + + // Initialize spin lock . + spin_lock_init(&me6000_device->preload_reg_lock); + spin_lock_init(&me6000_device->dio_ctrl_reg_lock); + + /* Create digital input/output instances. */ + for (i = 0; i < me6000_versions[version_idx].dio_subdevices; i++) { + subdevice = + (me_subdevice_t *) me6000_dio_constructor(me6000_device-> + base.info.pci. + reg_bases[3], i, + &me6000_device-> + dio_ctrl_reg_lock); + + if (!subdevice) { + me_device_deinit((me_device_t *) me6000_device); + kfree(me6000_device); + PERROR("Cannot get memory for subdevice.\n"); + return NULL; + } + + me_slist_add_subdevice_tail(&me6000_device->base.slist, + subdevice); + } + + /* Create analog output instances. */ + for (i = 0; i < me6000_versions[version_idx].ao_subdevices; i++) { + high_range = ((i == 8) + && + ((me6000_device->base.info.pci.device_id == + PCI_DEVICE_ID_MEILHAUS_ME6359) + || (me6000_device->base.info.pci.device_id == + PCI_DEVICE_ID_MEILHAUS_ME6259) + ) + )? 1 : 0; + + fifo = + (i < + me6000_versions[version_idx]. + ao_fifo) ? ME6000_AO_HAS_FIFO : 0x0; + fifo |= (i < 4) ? ME6000_AO_EXTRA_HARDWARE : 0x0; + + subdevice = + (me_subdevice_t *) me6000_ao_constructor(me6000_device-> + base.info.pci. + reg_bases[2], + &me6000_device-> + preload_reg_lock, + &me6000_device-> + preload_flags, + &me6000_device-> + triggering_flags, + i, fifo, + me6000_device-> + base.irq, + high_range, + me6000_workqueue); + + if (!subdevice) { + me_device_deinit((me_device_t *) me6000_device); + kfree(me6000_device); + PERROR("Cannot get memory for subdevice.\n"); + return NULL; + } + + me_slist_add_subdevice_tail(&me6000_device->base.slist, + subdevice); + } + + return (me_device_t *) me6000_device; +} + +// Init and exit of module. + +static int __init me6000_init(void) +{ + PDEBUG("executed.\n"); + + me6000_workqueue = create_singlethread_workqueue("me6000"); + return 0; +} + +static void __exit me6000_exit(void) +{ + PDEBUG("executed.\n"); + + flush_workqueue(me6000_workqueue); + destroy_workqueue(me6000_workqueue); +} + +module_init(me6000_init); +module_exit(me6000_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-6000 Device"); +MODULE_SUPPORTED_DEVICE("Meilhaus ME-6000 Devices"); +MODULE_LICENSE("GPL"); + +// Export the constructor. +EXPORT_SYMBOL(me6000_pci_constructor); |