+/*
+ * UIO driver fo Humusoft MF624 DAQ card.
+ * Copyright (C) 2011 Rostislav Lisovy <lisovy@gmail.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.
+ *
+ * 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.
+ */
+
#include <linux/init.h>
#include <linux/module.h>
#include <linux/device.h>
#include <linux/kernel.h>
#include <linux/uio_driver.h>
-
#define PCI_VENDOR_ID_HUMUSOFT 0x186c
#define PCI_DEVICE_ID_MF624 0x0624
#define PCI_SUBVENDOR_ID_HUMUSOFT 0x186c
#define PCI_SUBDEVICE_DEVICE 0x0624
+/* BAR0 Interrupt control/status register */
#define INTCSR 0x4C
#define INTCSR_ADINT_ENABLE (1 << 0)
#define INTCSR_CTR4INT_ENABLE (1 << 3)
#define INTCSR_ADINT_STATUS (1 << 2)
#define INTCSR_CTR4INT_STATUS (1 << 5)
-typedef enum {ADC, CTR4, ALL} mf624_interrupt_source_t;
+enum mf624_interrupt_source {ADC, CTR4, ALL};
-
-void mf624_disable_interrupt(mf624_interrupt_source_t source, struct uio_info *info)
+void mf624_disable_interrupt(enum mf624_interrupt_source source,
+ struct uio_info *info)
{
- u32 *INTCSR_reg = ((u32*) info->mem[0].internal_addr) + INTCSR;
+ void __iomem *INTCSR_reg = info->mem[0].internal_addr + INTCSR;
switch (source) {
- case ADC:
- iowrite32(ioread32(INTCSR_reg) & ~(INTCSR_ADINT_ENABLE),
- INTCSR_reg);
- break;
- case CTR4:
- iowrite32(ioread32(INTCSR_reg) & ~(INTCSR_CTR4INT_ENABLE),
- INTCSR_reg);
- break;
- case ALL:
- iowrite32(ioread32(INTCSR_reg) & ~(INTCSR_ADINT_ENABLE | INTCSR_CTR4INT_ENABLE),
- INTCSR_reg);
- break;
- default:
- iowrite32(ioread32(INTCSR_reg) & ~(INTCSR_ADINT_ENABLE | INTCSR_CTR4INT_ENABLE),
- INTCSR_reg);
- break;
+ case ADC:
+ iowrite32(ioread32(INTCSR_reg)
+ & ~(INTCSR_ADINT_ENABLE | INTCSR_PCIINT_ENABLE),
+ INTCSR_reg);
+ break;
+
+ case CTR4:
+ iowrite32(ioread32(INTCSR_reg)
+ & ~(INTCSR_CTR4INT_ENABLE | INTCSR_PCIINT_ENABLE),
+ INTCSR_reg);
+ break;
+
+ case ALL:
+ default:
+ iowrite32(ioread32(INTCSR_reg)
+ & ~(INTCSR_ADINT_ENABLE | INTCSR_CTR4INT_ENABLE
+ | INTCSR_PCIINT_ENABLE),
+ INTCSR_reg);
+ break;
}
}
-void mf624_enable_interrupt(mf624_interrupt_source_t source, struct uio_info *info)
+void mf624_enable_interrupt(enum mf624_interrupt_source source,
+ struct uio_info *info)
{
- u32 *INTCSR_reg = ((u32*) info->mem[0].internal_addr) + INTCSR;
+ void __iomem *INTCSR_reg = info->mem[0].internal_addr + INTCSR;
switch (source) {
- case ADC:
- iowrite32(ioread32(INTCSR_reg) | (INTCSR_ADINT_ENABLE),
- INTCSR_reg);
- break;
- case CTR4:
- iowrite32(ioread32(INTCSR_reg) | (INTCSR_CTR4INT_ENABLE),
- INTCSR_reg);
- break;
- case ALL:
- iowrite32(ioread32(INTCSR_reg) | (INTCSR_ADINT_ENABLE | INTCSR_CTR4INT_ENABLE),
- INTCSR_reg);
- break;
- default:
- iowrite32(ioread32(INTCSR_reg) | (INTCSR_ADINT_ENABLE | INTCSR_CTR4INT_ENABLE),
- INTCSR_reg);
- break;
+ case ADC:
+ iowrite32(ioread32(INTCSR_reg)
+ | INTCSR_ADINT_ENABLE | INTCSR_PCIINT_ENABLE,
+ INTCSR_reg);
+ break;
+
+ case CTR4:
+ iowrite32(ioread32(INTCSR_reg)
+ | INTCSR_CTR4INT_ENABLE | INTCSR_PCIINT_ENABLE,
+ INTCSR_reg);
+ break;
+
+ case ALL:
+ default:
+ iowrite32(ioread32(INTCSR_reg)
+ | INTCSR_ADINT_ENABLE | INTCSR_CTR4INT_ENABLE
+ | INTCSR_PCIINT_ENABLE,
+ INTCSR_reg);
+ break;
}
}
static irqreturn_t mf624_irq_handler(int irq, struct uio_info *info)
{
- u32 *INTCSR_reg = ((u32*) info->mem[0].internal_addr) + INTCSR;
+ void __iomem *INTCSR_reg = info->mem[0].internal_addr + INTCSR;
- if (((ioread32(INTCSR_reg) & INTCSR_ADINT_ENABLE) > 0)
- && ((ioread32(INTCSR_reg) & INTCSR_ADINT_STATUS) > 0))
- {
- //disable interrupt
+ if ((ioread32(INTCSR_reg) & INTCSR_ADINT_ENABLE)
+ && (ioread32(INTCSR_reg) & INTCSR_ADINT_STATUS)) {
mf624_disable_interrupt(ADC, info);
return IRQ_HANDLED;
}
- if (((ioread32(INTCSR_reg) & INTCSR_CTR4INT_ENABLE) > 0)
- && ((ioread32(INTCSR_reg) & INTCSR_CTR4INT_STATUS) > 0))
- {
- //disable interrupt
+ if ((ioread32(INTCSR_reg) & INTCSR_CTR4INT_ENABLE)
+ && (ioread32(INTCSR_reg) & INTCSR_CTR4INT_STATUS)) {
mf624_disable_interrupt(CTR4, info);
return IRQ_HANDLED;
}
static int mf624_irqcontrol(struct uio_info *info, s32 irq_on)
{
- if (irq_on == 0) { // Disable interrupts
+ if (irq_on == 0)
mf624_disable_interrupt(ALL, info);
- }
- else if (irq_on == 1) {
+ else if (irq_on == 1)
mf624_enable_interrupt(ALL, info);
- }
return 0;
}
-static int __devinit mf624_pci_probe(struct pci_dev *dev,
- const struct pci_device_id *id)
+static int mf624_pci_probe(struct pci_dev *dev, const struct pci_device_id *id)
{
struct uio_info *info;
info = kzalloc(sizeof(struct uio_info), GFP_KERNEL);
if (!info)
return -ENOMEM;
-
+
if (pci_enable_device(dev))
goto out_free;
if (pci_request_regions(dev, "mf624"))
goto out_disable;
-
+
info->name = "mf624";
info->version = "0.0.1";
- // BAR0
- info->mem[0].name = "PCI chipset, interrupts, status bits, special functions";
+ /* Note: Datasheet says device uses BAR0, BAR1, BAR2 -- do not trust it */
+
+ /* BAR0 */
+ info->mem[0].name = "PCI chipset, interrupts, status "
+ "bits, special functions";
info->mem[0].addr = pci_resource_start(dev, 0);
if (!info->mem[0].addr)
goto out_release;
if (!info->mem[0].internal_addr)
goto out_release;
-
- //BAR2
+ /* BAR2 */
info->mem[1].name = "ADC, DAC, DIO";
info->mem[1].addr = pci_resource_start(dev, 2);
if (!info->mem[1].addr)
- goto out_release;
+ goto out_unmap0;
info->mem[1].size = pci_resource_len(dev, 2);
info->mem[1].memtype = UIO_MEM_PHYS;
info->mem[1].internal_addr = pci_ioremap_bar(dev, 2);
if (!info->mem[1].internal_addr)
- goto out_release;
+ goto out_unmap0;
-
- //BAR4
+ /* BAR4 */
info->mem[2].name = "Counter/timer chip";
info->mem[2].addr = pci_resource_start(dev, 4);
if (!info->mem[2].addr)
- goto out_release;
+ goto out_unmap1;
info->mem[2].size = pci_resource_len(dev, 4);
info->mem[2].memtype = UIO_MEM_PHYS;
info->mem[2].internal_addr = pci_ioremap_bar(dev, 4);
if (!info->mem[2].internal_addr)
- goto out_release;
+ goto out_unmap1;
-
info->irq = dev->irq;
info->irq_flags = IRQF_SHARED;
info->handler = mf624_irq_handler;
info->irqcontrol = mf624_irqcontrol;
- if(uio_register_device(&dev->dev, info))
- goto out_unmap;
+ if (uio_register_device(&dev->dev, info))
+ goto out_unmap2;
pci_set_drvdata(dev, info);
return 0;
-
-out_unmap:
- iounmap(info->mem[0].internal_addr);
- iounmap(info->mem[1].internal_addr);
+out_unmap2:
iounmap(info->mem[2].internal_addr);
+out_unmap1:
+ iounmap(info->mem[1].internal_addr);
+out_unmap0:
+ iounmap(info->mem[0].internal_addr);
+
out_release:
pci_release_regions(dev);
+
out_disable:
pci_disable_device(dev);
+
out_free:
kfree(info);
return -ENODEV;
static void mf624_pci_remove(struct pci_dev *dev)
{
struct uio_info *info = pci_get_drvdata(dev);
-
+
mf624_disable_interrupt(ALL, info);
-
+
uio_unregister_device(info);
pci_release_regions(dev);
pci_disable_device(dev);
kfree(info);
}
-static struct pci_device_id mf624_pci_id[] __devinitdata = {
- {
- .vendor = PCI_VENDOR_ID_HUMUSOFT,
- .device = PCI_DEVICE_ID_MF624,
- .subvendor = PCI_SUBVENDOR_ID_HUMUSOFT,
- .subdevice = PCI_SUBDEVICE_DEVICE,
- },
+static DEFINE_PCI_DEVICE_TABLE(mf624_pci_id) = {
+ { PCI_DEVICE(PCI_VENDOR_ID_HUMUSOFT, PCI_DEVICE_ID_MF624) },
{ 0, }
};
static struct pci_driver mf624_pci_driver = {
.name = "mf624",
.id_table = mf624_pci_id,
- .probe = mf624_pci_probe,
+ .probe = mf624_pci_probe,
.remove = mf624_pci_remove,
};
+MODULE_DEVICE_TABLE(pci, mf624_pci_id);
-static int __init mf624_init_module(void)
-{
- return pci_register_driver(&mf624_pci_driver);
-}
-
-static void __exit mf624_exit_module(void)
-{
- pci_unregister_driver(&mf624_pci_driver);
-}
-
-module_init(mf624_init_module);
-module_exit(mf624_exit_module);
-
+module_pci_driver(mf624_pci_driver);
MODULE_LICENSE("GPL v2");
MODULE_AUTHOR("Rostislav Lisovy <lisovy@gmail.com>");
projects / mf6xx.git / blobdiff