UIO: Hilscher CIF card driver

this is a patch that adds support for Hilscher CIF DeviceNet and Profibus cards. I tested it on a Kontron CPX board, and Thomas reviewed it. You can find the user space part here: http://www.osadl.org/projects/downloads/UIO/user/cif-0.1.0.tar.gz Notes: cif_api.c is the main file you want to look at. It contains the functions to open, close, mmap and so on. cif_dps.c adds functions specific to Profibus cards, and cif_dn.c contains functions for DeviceNet cards. cif.c is a universal playground, it's just a small test program. The user space part of this UIO driver is still work in progress, and not everything is tested yet. At the moment, the thread in cif_api.c contains some code that artificially makes the card generate interrupts, this was added for testing and will be removed later. But the driver already contains all the functions needed for useful operation, so it gives a good idea of how such a thing looks like. For comparison, here's what you get from the manufacturer (www.hilscher.com) when you ask for a Linux 2.6 driver: http://www.tglx.de/private/hjk/cif-orig-2.6.tar.bz2 WARNING: Don't look at the code for too long, you might become sick :-) Signed-off-by: Hans-Jürgen Koch <hjk@linutronix.de> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

UIO: Hilscher CIF card driver
this is a patch that adds support for Hilscher CIF DeviceNet and Profibus cards. I tested it on a Kontron CPX board, and Thomas reviewed it. You can find the user space part here: http://www.osadl.org/projects/downloads/UIO/user/cif-0.1.0.tar.gz Notes: cif_api.c is the main file you want to look at. It contains the functions to open, close, mmap and so on. cif_dps.c adds functions specific to Profibus cards, and cif_dn.c contains functions for DeviceNet cards. cif.c is a universal playground, it's just a small test program. The user space part of this UIO driver is still work in progress, and not everything is tested yet. At the moment, the thread in cif_api.c contains some code that artificially makes the card generate interrupts, this was added for testing and will be removed later. But the driver already contains all the functions needed for useful operation, so it gives a good idea of how such a thing looks like. For comparison, here's what you get from the manufacturer (www.hilscher.com) when you ask for a Linux 2.6 driver: http://www.tglx.de/private/hjk/cif-orig-2.6.tar.bz2 WARNING: Don't look at the code for too long, you might become sick :-) Signed-off-by: Hans-Jürgen Koch <hjk@linutronix.de> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Hans-Jürgen Koch · Greg Kroah-Hartman
1 parent e3e0a28b5b
Showing 3 changed files with 171 additions and 1 deletions Side-by-side Diff
drivers/uio/Kconfig
drivers/uio/Makefile
drivers/uio/uio_cif.c
@@ -13,5 +13,18 @@
  
 	  If you don't know what to do here, say N.
  
+config UIO_CIF
+	tristate "generic Hilscher CIF Card driver"
+	depends on UIO && PCI
+	default n
+	help
+	  Driver for Hilscher CIF DeviceNet and Profibus cards.  This
+	  driver requires a userspace component that handles all of the
+	  heavy lifting and can be found at:
+	  	http://www.osadl.org/projects/downloads/UIO/user/cif-*
+
+	  To compile this driver as a module, choose M here: the module
+	  will be called uio_cif.
+
 endmenu
-obj-$(CONFIG_UIO) += uio.o
+obj-$(CONFIG_UIO)	+= uio.o
+obj-$(CONFIG_UIO_CIF)	+= uio_cif.o
+/*
+ * UIO Hilscher CIF card driver
+ *
+ * (C) 2007 Hans J. Koch <hjk@linutronix.de>
+ * Original code (C) 2005 Benedikt Spranger <b.spranger@linutronix.de>
+ *
+ * Licensed under GPL version 2 only.
+ *
+ */
+
+#include <linux/device.h>
+#include <linux/module.h>
+#include <linux/pci.h>
+#include <linux/uio_driver.h>
+
+#include <asm/io.h>
+
+#ifndef PCI_DEVICE_ID_PLX_9030
+#define PCI_DEVICE_ID_PLX_9030	0x9030
+#endif
+
+#define PLX9030_INTCSR		0x4C
+#define INTSCR_INT1_ENABLE	0x01
+#define INTSCR_INT1_STATUS	0x04
+#define INT1_ENABLED_AND_ACTIVE	(INTSCR_INT1_ENABLE | INTSCR_INT1_STATUS)
+
+#define PCI_SUBVENDOR_ID_PEP	0x1518
+#define CIF_SUBDEVICE_PROFIBUS	0x430
+#define CIF_SUBDEVICE_DEVICENET	0x432
+
+
+static irqreturn_t hilscher_handler(int irq, struct uio_info *dev_info)
+{
+	void __iomem *plx_intscr = dev_info->mem[0].internal_addr
+					+ PLX9030_INTCSR;
+
+	if ((ioread8(plx_intscr) & INT1_ENABLED_AND_ACTIVE)
+	    != INT1_ENABLED_AND_ACTIVE)
+		return IRQ_NONE;
+
+	/* Disable interrupt */
+	iowrite8(ioread8(plx_intscr) & ~INTSCR_INT1_ENABLE, plx_intscr);
+	return IRQ_HANDLED;
+}
+
+static int __devinit hilscher_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, "hilscher"))
+		goto out_disable;
+
+	info->mem[0].addr = pci_resource_start(dev, 0);
+	if (!info->mem[0].addr)
+		goto out_release;
+	info->mem[0].internal_addr = ioremap(pci_resource_start(dev, 0),
+					     pci_resource_len(dev, 0));
+	if (!info->mem[0].internal_addr)
+		goto out_release;
+
+	info->mem[0].size = pci_resource_len(dev, 0);
+	info->mem[0].memtype = UIO_MEM_PHYS;
+	info->mem[1].addr = pci_resource_start(dev, 2);
+	info->mem[1].size = pci_resource_len(dev, 2);
+	info->mem[1].memtype = UIO_MEM_PHYS;
+	switch (id->subdevice) {
+		case CIF_SUBDEVICE_PROFIBUS:
+			info->name = "CIF_Profibus";
+			break;
+		case CIF_SUBDEVICE_DEVICENET:
+			info->name = "CIF_Devicenet";
+			break;
+		default:
+			info->name = "CIF_???";
+	}
+	info->version = "0.0.1";
+	info->irq = dev->irq;
+	info->irq_flags = IRQF_DISABLED | IRQF_SHARED;
+	info->handler = hilscher_handler;
+
+	if (uio_register_device(&dev->dev, info))
+		goto out_unmap;
+
+	pci_set_drvdata(dev, info);
+
+	return 0;
+out_unmap:
+	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 hilscher_pci_remove(struct pci_dev *dev)
+{
+	struct uio_info *info = pci_get_drvdata(dev);
+
+	uio_unregister_device(info);
+	pci_release_regions(dev);
+	pci_disable_device(dev);
+	pci_set_drvdata(dev, NULL);
+	iounmap(info->mem[0].internal_addr);
+
+	kfree (info);
+}
+
+static struct pci_device_id hilscher_pci_ids[] = {
+	{
+		.vendor =	PCI_VENDOR_ID_PLX,
+		.device =	PCI_DEVICE_ID_PLX_9030,
+		.subvendor =	PCI_SUBVENDOR_ID_PEP,
+		.subdevice =	CIF_SUBDEVICE_PROFIBUS,
+	},
+	{
+		.vendor =	PCI_VENDOR_ID_PLX,
+		.device =	PCI_DEVICE_ID_PLX_9030,
+		.subvendor =	PCI_SUBVENDOR_ID_PEP,
+		.subdevice =	CIF_SUBDEVICE_DEVICENET,
+	},
+	{ 0, }
+};
+
+static struct pci_driver hilscher_pci_driver = {
+	.name = "hilscher",
+	.id_table = hilscher_pci_ids,
+	.probe = hilscher_pci_probe,
+	.remove = hilscher_pci_remove,
+};
+
+static int __init hilscher_init_module(void)
+{
+	return pci_register_driver(&hilscher_pci_driver);
+}
+
+static void __exit hilscher_exit_module(void)
+{
+	pci_unregister_driver(&hilscher_pci_driver);
+}
+
+module_init(hilscher_init_module);
+module_exit(hilscher_exit_module);
+
+MODULE_LICENSE("GPL v2");
+MODULE_AUTHOR("Hans J. Koch, Benedikt Spranger");
...	...	@@ -13,5 +13,18 @@
13	13
14	14	If you don't know what to do here, say N.
15	15
	16	+config UIO_CIF
	17	+ tristate "generic Hilscher CIF Card driver"
	18	+ depends on UIO && PCI
	19	+ default n
	20	+ help
	21	+ Driver for Hilscher CIF DeviceNet and Profibus cards. This
	22	+ driver requires a userspace component that handles all of the
	23	+ heavy lifting and can be found at:
	24	+ http://www.osadl.org/projects/downloads/UIO/user/cif-*
	25	+
	26	+ To compile this driver as a module, choose M here: the module
	27	+ will be called uio_cif.
	28	+
16	29	endmenu
1		-obj-$(CONFIG_UIO) += uio.o
	1	+obj-$(CONFIG_UIO) += uio.o
	2	+obj-$(CONFIG_UIO_CIF) += uio_cif.o
	1	+/*
	2	+ * UIO Hilscher CIF card driver
	3	+ *
	4	+ * (C) 2007 Hans J. Koch <hjk@linutronix.de>
	5	+ * Original code (C) 2005 Benedikt Spranger <b.spranger@linutronix.de>
	6	+ *
	7	+ * Licensed under GPL version 2 only.
	8	+ *
	9	+ */
	10	+
	11	+#include <linux/device.h>
	12	+#include <linux/module.h>
	13	+#include <linux/pci.h>
	14	+#include <linux/uio_driver.h>
	15	+
	16	+#include <asm/io.h>
	17	+
	18	+#ifndef PCI_DEVICE_ID_PLX_9030
	19	+#define PCI_DEVICE_ID_PLX_9030 0x9030
	20	+#endif
	21	+
	22	+#define PLX9030_INTCSR 0x4C
	23	+#define INTSCR_INT1_ENABLE 0x01
	24	+#define INTSCR_INT1_STATUS 0x04
	25	+#define INT1_ENABLED_AND_ACTIVE (INTSCR_INT1_ENABLE \| INTSCR_INT1_STATUS)
	26	+
	27	+#define PCI_SUBVENDOR_ID_PEP 0x1518
	28	+#define CIF_SUBDEVICE_PROFIBUS 0x430
	29	+#define CIF_SUBDEVICE_DEVICENET 0x432
	30	+
	31	+
	32	+static irqreturn_t hilscher_handler(int irq, struct uio_info *dev_info)
	33	+{
	34	+ void __iomem *plx_intscr = dev_info->mem[0].internal_addr
	35	+ + PLX9030_INTCSR;
	36	+
	37	+ if ((ioread8(plx_intscr) & INT1_ENABLED_AND_ACTIVE)
	38	+ != INT1_ENABLED_AND_ACTIVE)
	39	+ return IRQ_NONE;
	40	+
	41	+ /* Disable interrupt */
	42	+ iowrite8(ioread8(plx_intscr) & ~INTSCR_INT1_ENABLE, plx_intscr);
	43	+ return IRQ_HANDLED;
	44	+}
	45	+
	46	+static int __devinit hilscher_pci_probe(struct pci_dev *dev,
	47	+ const struct pci_device_id *id)
	48	+{
	49	+ struct uio_info *info;
	50	+
	51	+ info = kzalloc(sizeof(struct uio_info), GFP_KERNEL);
	52	+ if (!info)
	53	+ return -ENOMEM;
	54	+
	55	+ if (pci_enable_device(dev))
	56	+ goto out_free;
	57	+
	58	+ if (pci_request_regions(dev, "hilscher"))
	59	+ goto out_disable;
	60	+
	61	+ info->mem[0].addr = pci_resource_start(dev, 0);
	62	+ if (!info->mem[0].addr)
	63	+ goto out_release;
	64	+ info->mem[0].internal_addr = ioremap(pci_resource_start(dev, 0),
	65	+ pci_resource_len(dev, 0));
	66	+ if (!info->mem[0].internal_addr)
	67	+ goto out_release;
	68	+
	69	+ info->mem[0].size = pci_resource_len(dev, 0);
	70	+ info->mem[0].memtype = UIO_MEM_PHYS;
	71	+ info->mem[1].addr = pci_resource_start(dev, 2);
	72	+ info->mem[1].size = pci_resource_len(dev, 2);
	73	+ info->mem[1].memtype = UIO_MEM_PHYS;
	74	+ switch (id->subdevice) {
	75	+ case CIF_SUBDEVICE_PROFIBUS:
	76	+ info->name = "CIF_Profibus";
	77	+ break;
	78	+ case CIF_SUBDEVICE_DEVICENET:
	79	+ info->name = "CIF_Devicenet";
	80	+ break;
	81	+ default:
	82	+ info->name = "CIF_???";
	83	+ }
	84	+ info->version = "0.0.1";
	85	+ info->irq = dev->irq;
	86	+ info->irq_flags = IRQF_DISABLED \| IRQF_SHARED;
	87	+ info->handler = hilscher_handler;
	88	+
	89	+ if (uio_register_device(&dev->dev, info))
	90	+ goto out_unmap;
	91	+
	92	+ pci_set_drvdata(dev, info);
	93	+
	94	+ return 0;
	95	+out_unmap:
	96	+ iounmap(info->mem[0].internal_addr);
	97	+out_release:
	98	+ pci_release_regions(dev);
	99	+out_disable:
	100	+ pci_disable_device(dev);
	101	+out_free:
	102	+ kfree (info);
	103	+ return -ENODEV;
	104	+}
	105	+
	106	+static void hilscher_pci_remove(struct pci_dev *dev)
	107	+{
	108	+ struct uio_info *info = pci_get_drvdata(dev);
	109	+
	110	+ uio_unregister_device(info);
	111	+ pci_release_regions(dev);
	112	+ pci_disable_device(dev);
	113	+ pci_set_drvdata(dev, NULL);
	114	+ iounmap(info->mem[0].internal_addr);
	115	+
	116	+ kfree (info);
	117	+}
	118	+
	119	+static struct pci_device_id hilscher_pci_ids[] = {
	120	+ {
	121	+ .vendor = PCI_VENDOR_ID_PLX,
	122	+ .device = PCI_DEVICE_ID_PLX_9030,
	123	+ .subvendor = PCI_SUBVENDOR_ID_PEP,
	124	+ .subdevice = CIF_SUBDEVICE_PROFIBUS,
	125	+ },
	126	+ {
	127	+ .vendor = PCI_VENDOR_ID_PLX,
	128	+ .device = PCI_DEVICE_ID_PLX_9030,
	129	+ .subvendor = PCI_SUBVENDOR_ID_PEP,
	130	+ .subdevice = CIF_SUBDEVICE_DEVICENET,
	131	+ },
	132	+ { 0, }
	133	+};
	134	+
	135	+static struct pci_driver hilscher_pci_driver = {
	136	+ .name = "hilscher",
	137	+ .id_table = hilscher_pci_ids,
	138	+ .probe = hilscher_pci_probe,
	139	+ .remove = hilscher_pci_remove,
	140	+};
	141	+
	142	+static int __init hilscher_init_module(void)
	143	+{
	144	+ return pci_register_driver(&hilscher_pci_driver);
	145	+}
	146	+
	147	+static void __exit hilscher_exit_module(void)
	148	+{
	149	+ pci_unregister_driver(&hilscher_pci_driver);
	150	+}
	151	+
	152	+module_init(hilscher_init_module);
	153	+module_exit(hilscher_exit_module);
	154	+
	155	+MODULE_LICENSE("GPL v2");
	156	+MODULE_AUTHOR("Hans J. Koch, Benedikt Spranger");