diff options
Diffstat (limited to 'drivers/staging/meilhaus/me1400_device.c')
| -rw-r--r-- | drivers/staging/meilhaus/me1400_device.c | 256 |
1 files changed, 256 insertions, 0 deletions
diff --git a/drivers/staging/meilhaus/me1400_device.c b/drivers/staging/meilhaus/me1400_device.c new file mode 100644 index 00000000000..b95bb4fce6a --- /dev/null +++ b/drivers/staging/meilhaus/me1400_device.c @@ -0,0 +1,256 @@ +/** + * @file me1400_device.c + * + * @brief ME-1400 device instance. + * @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. + */ + +/* + * User application could also include the kernel header files. But the + * real kernel functions are protected by #ifdef __KERNEL__. + */ +#ifndef __KERNEL__ +# define __KERNEL__ +#endif + +/* + * This must be defined before module.h is included. Not needed, when + * it is a built in driver. + */ +#ifndef MODULE +# define MODULE +#endif + +#include <linux/module.h> + +#include <linux/pci.h> +#include <linux/slab.h> +#include <linux/sched.h> +#include <linux/interrupt.h> +#include <linux/version.h> + +#include "meids.h" +#include "meerror.h" +#include "mecommon.h" +#include "meinternal.h" + +#include "medebug.h" + +#include "me1400_device.h" +#include "me8254.h" +#include "me8254_reg.h" +#include "me8255.h" +#include "me1400_ext_irq.h" + +me_device_t *me1400_pci_constructor(struct pci_dev *pci_device) +{ + int err; + me1400_device_t *me1400_device; + me_subdevice_t *subdevice; + unsigned int version_idx; + unsigned int me8255_idx; + unsigned int dio_idx; + unsigned int me8254_idx; + unsigned int ctr_idx; + unsigned int ext_irq_idx; + + PDEBUG("executed.\n"); + + // Allocate structure for device instance. + me1400_device = kmalloc(sizeof(me1400_device_t), GFP_KERNEL); + + if (!me1400_device) { + PERROR("Cannot get memory for 1400ate device instance.\n"); + return NULL; + } + + memset(me1400_device, 0, sizeof(me1400_device_t)); + + // Initialize base class structure. + err = me_device_pci_init((me_device_t *) me1400_device, pci_device); + + if (err) { + kfree(me1400_device); + PERROR("Cannot initialize device base class.\n"); + return NULL; + } + + /* Check for ME1400 extension device. If detected we fake a ME-1400 D device id. */ + if (me1400_device->base.info.pci.device_id == + PCI_DEVICE_ID_MEILHAUS_ME140C) { + uint8_t ctrl; + ctrl = + inb(me1400_device->base.info.pci.reg_bases[2] + + ME1400D_CLK_SRC_2_REG); + PDEBUG_REG("xxx_reg inb(0x%X+0x%X)=0x%x\n", + me1400_device->base.info.pci.reg_bases[2], + ME1400D_CLK_SRC_2_REG, ctrl); + outb(ctrl | 0xF0, + me1400_device->base.info.pci.reg_bases[2] + + ME1400D_CLK_SRC_2_REG); + PDEBUG_REG("xxx_reg outb(0x%X+0x%X)=0x%x\n", + me1400_device->base.info.pci.reg_bases[2], + ME1400D_CLK_SRC_2_REG, ctrl | 0xF0); + ctrl = + inb(me1400_device->base.info.pci.reg_bases[2] + + ME1400D_CLK_SRC_2_REG); + PDEBUG_REG("xxx_reg inb(0x%X+0x%X)=0x%x\n", + me1400_device->base.info.pci.reg_bases[2], + ME1400D_CLK_SRC_2_REG, ctrl); + + if ((ctrl & 0xF0) == 0xF0) { + PINFO("ME1400 D detected.\n"); + me1400_device->base.info.pci.device_id = + PCI_DEVICE_ID_MEILHAUS_ME140D; + } + } + + /* Initialize global stuff of digital i/o subdevices. */ + for (me8255_idx = 0; me8255_idx < ME1400_MAX_8255; me8255_idx++) { + me1400_device->dio_current_mode[me8255_idx] = 0; + spin_lock_init(&me1400_device->dio_ctrl_reg_lock[me8255_idx]); + } + + /* Initialize global stuff of counter subdevices. */ + spin_lock_init(&me1400_device->clk_src_reg_lock); + + for (me8254_idx = 0; me8254_idx < ME1400_MAX_8254; me8254_idx++) + spin_lock_init(&me1400_device->ctr_ctrl_reg_lock[me8254_idx]); + + /* Get the index in the device version information table. */ + version_idx = + me1400_versions_get_device_index(me1400_device->base.info.pci. + device_id); + + /* Generate DIO subdevice instances. */ + for (me8255_idx = 0; + me8255_idx < me1400_versions[version_idx].dio_chips; + me8255_idx++) { + for (dio_idx = 0; dio_idx < 3; dio_idx++) { + subdevice = + (me_subdevice_t *) + me8255_constructor(me1400_versions[version_idx]. + device_id, + me1400_device->base.info.pci. + reg_bases[2], me8255_idx, + dio_idx, + &me1400_device-> + dio_current_mode[me8255_idx], + &me1400_device-> + dio_ctrl_reg_lock[me8255_idx]); + + if (!subdevice) { + me_device_deinit((me_device_t *) me1400_device); + kfree(me1400_device); + PERROR("Cannot get memory for subdevice.\n"); + return NULL; + } + + me_slist_add_subdevice_tail(&me1400_device->base.slist, + subdevice); + } + } + + /* Generate counter subdevice instances. */ + for (me8254_idx = 0; + me8254_idx < me1400_versions[version_idx].ctr_chips; + me8254_idx++) { + for (ctr_idx = 0; ctr_idx < 3; ctr_idx++) { + subdevice = + (me_subdevice_t *) + me8254_constructor(me1400_device->base.info.pci. + device_id, + me1400_device->base.info.pci. + reg_bases[2], me8254_idx, + ctr_idx, + &me1400_device-> + ctr_ctrl_reg_lock[me8254_idx], + &me1400_device-> + clk_src_reg_lock); + + if (!subdevice) { + me_device_deinit((me_device_t *) me1400_device); + kfree(me1400_device); + PERROR("Cannot get memory for subdevice.\n"); + return NULL; + } + + me_slist_add_subdevice_tail(&me1400_device->base.slist, + subdevice); + } + } + + /* Generate external interrupt subdevice instances. */ + for (ext_irq_idx = 0; + ext_irq_idx < me1400_versions[version_idx].ext_irq_subdevices; + ext_irq_idx++) { + subdevice = + (me_subdevice_t *) + me1400_ext_irq_constructor(me1400_device->base.info.pci. + device_id, + me1400_device->base.info.pci. + reg_bases[1], + me1400_device->base.info.pci. + reg_bases[2], + &me1400_device->clk_src_reg_lock, + me1400_device->base.irq); + + if (!subdevice) { + me_device_deinit((me_device_t *) me1400_device); + kfree(me1400_device); + PERROR("Cannot get memory for subdevice.\n"); + return NULL; + } + + me_slist_add_subdevice_tail(&me1400_device->base.slist, + subdevice); + } + + return (me_device_t *) me1400_device; +} + +// Init and exit of module. + +static int __init me1400_init(void) +{ + PDEBUG("executed.\n"); + return 0; +} + +static void __exit me1400_exit(void) +{ + PDEBUG("executed.\n"); +} + +module_init(me1400_init); +module_exit(me1400_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 Meilhaus ME-14xx devices"); +MODULE_SUPPORTED_DEVICE("Meilhaus ME-14xx MIO devices"); +MODULE_LICENSE("GPL"); + +// Export the constructor. +EXPORT_SYMBOL(me1400_pci_constructor); |