diff options
Diffstat (limited to 'kernel/drivers/staging/comedi/drivers/addi_apci_2032.c')
-rw-r--r-- | kernel/drivers/staging/comedi/drivers/addi_apci_2032.c | 339 |
1 files changed, 339 insertions, 0 deletions
diff --git a/kernel/drivers/staging/comedi/drivers/addi_apci_2032.c b/kernel/drivers/staging/comedi/drivers/addi_apci_2032.c new file mode 100644 index 000000000..ad715253b --- /dev/null +++ b/kernel/drivers/staging/comedi/drivers/addi_apci_2032.c @@ -0,0 +1,339 @@ +/* + * addi_apci_2032.c + * Copyright (C) 2004,2005 ADDI-DATA GmbH for the source code of this module. + * Project manager: Eric Stolz + * + * ADDI-DATA GmbH + * Dieselstrasse 3 + * D-77833 Ottersweier + * Tel: +19(0)7223/9493-0 + * Fax: +49(0)7223/9493-92 + * http://www.addi-data.com + * info@addi-data.com + * + * This program 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. + */ + +#include <linux/module.h> +#include <linux/interrupt.h> +#include <linux/slab.h> + +#include "../comedi_pci.h" +#include "addi_watchdog.h" + +/* + * PCI bar 1 I/O Register map + */ +#define APCI2032_DO_REG 0x00 +#define APCI2032_INT_CTRL_REG 0x04 +#define APCI2032_INT_CTRL_VCC_ENA (1 << 0) +#define APCI2032_INT_CTRL_CC_ENA (1 << 1) +#define APCI2032_INT_STATUS_REG 0x08 +#define APCI2032_INT_STATUS_VCC (1 << 0) +#define APCI2032_INT_STATUS_CC (1 << 1) +#define APCI2032_STATUS_REG 0x0c +#define APCI2032_STATUS_IRQ (1 << 0) +#define APCI2032_WDOG_REG 0x10 + +struct apci2032_int_private { + spinlock_t spinlock; + bool active; + unsigned char enabled_isns; +}; + +static int apci2032_do_insn_bits(struct comedi_device *dev, + struct comedi_subdevice *s, + struct comedi_insn *insn, + unsigned int *data) +{ + s->state = inl(dev->iobase + APCI2032_DO_REG); + + if (comedi_dio_update_state(s, data)) + outl(s->state, dev->iobase + APCI2032_DO_REG); + + data[1] = s->state; + + return insn->n; +} + +static int apci2032_int_insn_bits(struct comedi_device *dev, + struct comedi_subdevice *s, + struct comedi_insn *insn, + unsigned int *data) +{ + data[1] = inl(dev->iobase + APCI2032_INT_STATUS_REG) & 3; + return insn->n; +} + +static void apci2032_int_stop(struct comedi_device *dev, + struct comedi_subdevice *s) +{ + struct apci2032_int_private *subpriv = s->private; + + subpriv->active = false; + subpriv->enabled_isns = 0; + outl(0x0, dev->iobase + APCI2032_INT_CTRL_REG); +} + +static int apci2032_int_cmdtest(struct comedi_device *dev, + struct comedi_subdevice *s, + struct comedi_cmd *cmd) +{ + int err = 0; + + /* Step 1 : check if triggers are trivially valid */ + + err |= comedi_check_trigger_src(&cmd->start_src, TRIG_NOW); + err |= comedi_check_trigger_src(&cmd->scan_begin_src, TRIG_EXT); + err |= comedi_check_trigger_src(&cmd->convert_src, TRIG_NOW); + err |= comedi_check_trigger_src(&cmd->scan_end_src, TRIG_COUNT); + err |= comedi_check_trigger_src(&cmd->stop_src, TRIG_COUNT | TRIG_NONE); + + if (err) + return 1; + + /* Step 2a : make sure trigger sources are unique */ + err |= comedi_check_trigger_is_unique(cmd->stop_src); + + /* Step 2b : and mutually compatible */ + + if (err) + return 2; + + /* Step 3: check if arguments are trivially valid */ + + err |= comedi_check_trigger_arg_is(&cmd->start_arg, 0); + err |= comedi_check_trigger_arg_is(&cmd->scan_begin_arg, 0); + err |= comedi_check_trigger_arg_is(&cmd->convert_arg, 0); + err |= comedi_check_trigger_arg_is(&cmd->scan_end_arg, + cmd->chanlist_len); + if (cmd->stop_src == TRIG_COUNT) + err |= comedi_check_trigger_arg_min(&cmd->stop_arg, 1); + else /* TRIG_NONE */ + err |= comedi_check_trigger_arg_is(&cmd->stop_arg, 0); + + if (err) + return 3; + + /* Step 4: fix up any arguments */ + + /* Step 5: check channel list if it exists */ + + return 0; +} + +static int apci2032_int_cmd(struct comedi_device *dev, + struct comedi_subdevice *s) +{ + struct comedi_cmd *cmd = &s->async->cmd; + struct apci2032_int_private *subpriv = s->private; + unsigned char enabled_isns; + unsigned int n; + unsigned long flags; + + enabled_isns = 0; + for (n = 0; n < cmd->chanlist_len; n++) + enabled_isns |= 1 << CR_CHAN(cmd->chanlist[n]); + + spin_lock_irqsave(&subpriv->spinlock, flags); + + subpriv->enabled_isns = enabled_isns; + subpriv->active = true; + outl(enabled_isns, dev->iobase + APCI2032_INT_CTRL_REG); + + spin_unlock_irqrestore(&subpriv->spinlock, flags); + + return 0; +} + +static int apci2032_int_cancel(struct comedi_device *dev, + struct comedi_subdevice *s) +{ + struct apci2032_int_private *subpriv = s->private; + unsigned long flags; + + spin_lock_irqsave(&subpriv->spinlock, flags); + if (subpriv->active) + apci2032_int_stop(dev, s); + spin_unlock_irqrestore(&subpriv->spinlock, flags); + + return 0; +} + +static irqreturn_t apci2032_interrupt(int irq, void *d) +{ + struct comedi_device *dev = d; + struct comedi_subdevice *s = dev->read_subdev; + struct comedi_cmd *cmd = &s->async->cmd; + struct apci2032_int_private *subpriv; + unsigned int val; + + if (!dev->attached) + return IRQ_NONE; + + /* Check if VCC OR CC interrupt has occurred */ + val = inl(dev->iobase + APCI2032_STATUS_REG) & APCI2032_STATUS_IRQ; + if (!val) + return IRQ_NONE; + + subpriv = s->private; + spin_lock(&subpriv->spinlock); + + val = inl(dev->iobase + APCI2032_INT_STATUS_REG) & 3; + /* Disable triggered interrupt sources. */ + outl(~val & 3, dev->iobase + APCI2032_INT_CTRL_REG); + /* + * Note: We don't reenable the triggered interrupt sources because they + * are level-sensitive, hardware error status interrupt sources and + * they'd keep triggering interrupts repeatedly. + */ + + if (subpriv->active && (val & subpriv->enabled_isns) != 0) { + unsigned short bits = 0; + int i; + + /* Bits in scan data correspond to indices in channel list. */ + for (i = 0; i < cmd->chanlist_len; i++) { + unsigned int chan = CR_CHAN(cmd->chanlist[i]); + + if (val & (1 << chan)) + bits |= (1 << i); + } + + comedi_buf_write_samples(s, &bits, 1); + + if (cmd->stop_src == TRIG_COUNT && + s->async->scans_done >= cmd->stop_arg) + s->async->events |= COMEDI_CB_EOA; + } + + spin_unlock(&subpriv->spinlock); + + comedi_handle_events(dev, s); + + return IRQ_HANDLED; +} + +static int apci2032_reset(struct comedi_device *dev) +{ + outl(0x0, dev->iobase + APCI2032_DO_REG); + outl(0x0, dev->iobase + APCI2032_INT_CTRL_REG); + + addi_watchdog_reset(dev->iobase + APCI2032_WDOG_REG); + + return 0; +} + +static int apci2032_auto_attach(struct comedi_device *dev, + unsigned long context_unused) +{ + struct pci_dev *pcidev = comedi_to_pci_dev(dev); + struct comedi_subdevice *s; + int ret; + + ret = comedi_pci_enable(dev); + if (ret) + return ret; + dev->iobase = pci_resource_start(pcidev, 1); + apci2032_reset(dev); + + if (pcidev->irq > 0) { + ret = request_irq(pcidev->irq, apci2032_interrupt, + IRQF_SHARED, dev->board_name, dev); + if (ret == 0) + dev->irq = pcidev->irq; + } + + ret = comedi_alloc_subdevices(dev, 3); + if (ret) + return ret; + + /* Initialize the digital output subdevice */ + s = &dev->subdevices[0]; + s->type = COMEDI_SUBD_DO; + s->subdev_flags = SDF_WRITABLE; + s->n_chan = 32; + s->maxdata = 1; + s->range_table = &range_digital; + s->insn_bits = apci2032_do_insn_bits; + + /* Initialize the watchdog subdevice */ + s = &dev->subdevices[1]; + ret = addi_watchdog_init(s, dev->iobase + APCI2032_WDOG_REG); + if (ret) + return ret; + + /* Initialize the interrupt subdevice */ + s = &dev->subdevices[2]; + s->type = COMEDI_SUBD_DI; + s->subdev_flags = SDF_READABLE; + s->n_chan = 2; + s->maxdata = 1; + s->range_table = &range_digital; + s->insn_bits = apci2032_int_insn_bits; + if (dev->irq) { + struct apci2032_int_private *subpriv; + + dev->read_subdev = s; + subpriv = kzalloc(sizeof(*subpriv), GFP_KERNEL); + if (!subpriv) + return -ENOMEM; + spin_lock_init(&subpriv->spinlock); + s->private = subpriv; + s->subdev_flags = SDF_READABLE | SDF_CMD_READ | SDF_PACKED; + s->len_chanlist = 2; + s->do_cmdtest = apci2032_int_cmdtest; + s->do_cmd = apci2032_int_cmd; + s->cancel = apci2032_int_cancel; + } + + return 0; +} + +static void apci2032_detach(struct comedi_device *dev) +{ + if (dev->iobase) + apci2032_reset(dev); + comedi_pci_detach(dev); + if (dev->read_subdev) + kfree(dev->read_subdev->private); +} + +static struct comedi_driver apci2032_driver = { + .driver_name = "addi_apci_2032", + .module = THIS_MODULE, + .auto_attach = apci2032_auto_attach, + .detach = apci2032_detach, +}; + +static int apci2032_pci_probe(struct pci_dev *dev, + const struct pci_device_id *id) +{ + return comedi_pci_auto_config(dev, &apci2032_driver, id->driver_data); +} + +static const struct pci_device_id apci2032_pci_table[] = { + { PCI_DEVICE(PCI_VENDOR_ID_ADDIDATA, 0x1004) }, + { 0 } +}; +MODULE_DEVICE_TABLE(pci, apci2032_pci_table); + +static struct pci_driver apci2032_pci_driver = { + .name = "addi_apci_2032", + .id_table = apci2032_pci_table, + .probe = apci2032_pci_probe, + .remove = comedi_pci_auto_unconfig, +}; +module_comedi_pci_driver(apci2032_driver, apci2032_pci_driver); + +MODULE_AUTHOR("Comedi http://www.comedi.org"); +MODULE_DESCRIPTION("ADDI-DATA APCI-2032, 32 channel DO boards"); +MODULE_LICENSE("GPL"); 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