[linux.git] / drivers / uio / uio_netx.c

// SPDX-License-Identifier: GPL-2.0
/*
 * UIO driver for Hilscher NetX based fieldbus cards (cifX, comX).
 * See http://www.hilscher.com for details.
 *
 * (C) 2007 Hans J. Koch <[email protected]>
 * (C) 2008 Manuel Traut <[email protected]>
 *
 */

#include <linux/device.h>
#include <linux/io.h>
#include <linux/module.h>
#include <linux/pci.h>
#include <linux/slab.h>
#include <linux/uio_driver.h>

#define PCI_VENDOR_ID_HILSCHER		0x15CF
#define PCI_DEVICE_ID_HILSCHER_NETX	0x0000
#define PCI_DEVICE_ID_HILSCHER_NETPLC	0x0010
#define PCI_SUBDEVICE_ID_NETPLC_RAM	0x0000
#define PCI_SUBDEVICE_ID_NETPLC_FLASH	0x0001
#define PCI_SUBDEVICE_ID_NXSB_PCA	0x3235
#define PCI_SUBDEVICE_ID_NXPCA		0x3335

#define DPM_HOST_INT_EN0	0xfff0
#define DPM_HOST_INT_STAT0	0xffe0

#define DPM_HOST_INT_MASK	0xe600ffff
#define DPM_HOST_INT_GLOBAL_EN	0x80000000

static irqreturn_t netx_handler(int irq, struct uio_info *dev_info)
{
	void __iomem *int_enable_reg = dev_info->mem[0].internal_addr
					+ DPM_HOST_INT_EN0;
	void __iomem *int_status_reg = dev_info->mem[0].internal_addr
					+ DPM_HOST_INT_STAT0;

	/* Is one of our interrupts enabled and active ? */
	if (!(ioread32(int_enable_reg) & ioread32(int_status_reg)
		& DPM_HOST_INT_MASK))
		return IRQ_NONE;

	/* Disable interrupt */
	iowrite32(ioread32(int_enable_reg) & ~DPM_HOST_INT_GLOBAL_EN,
		int_enable_reg);
	return IRQ_HANDLED;
}

static int netx_pci_probe(struct pci_dev *dev,
					const struct pci_device_id *id)
{
	struct uio_info *info;
	int bar;

	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, "netx"))
		goto out_disable;

	switch (id->device) {
	case PCI_DEVICE_ID_HILSCHER_NETX:
		bar = 0;
		info->name = "netx";
		break;
	case PCI_DEVICE_ID_HILSCHER_NETPLC:
		bar = 0;
		info->name = "netplc";
		break;
	default:
		bar = 2;
		info->name = "netx_plx";
	}

	/* BAR0 or 2 points to the card's dual port memory */
	info->mem[0].addr = pci_resource_start(dev, bar);
	if (!info->mem[0].addr)
		goto out_release;
	info->mem[0].internal_addr = ioremap(pci_resource_start(dev, bar),
						pci_resource_len(dev, bar));

	if (!info->mem[0].internal_addr)
			goto out_release;

	info->mem[0].size = pci_resource_len(dev, bar);
	info->mem[0].memtype = UIO_MEM_PHYS;
	info->irq = dev->irq;
	info->irq_flags = IRQF_SHARED;
	info->handler = netx_handler;
	info->version = "0.0.1";

	/* Make sure all interrupts are disabled */
	iowrite32(0, info->mem[0].internal_addr + DPM_HOST_INT_EN0);

	if (uio_register_device(&dev->dev, info))
		goto out_unmap;

	pci_set_drvdata(dev, info);
	dev_info(&dev->dev, "Found %s card, registered UIO device.\n",
				info->name);

	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 netx_pci_remove(struct pci_dev *dev)
{
	struct uio_info *info = pci_get_drvdata(dev);

	/* Disable all interrupts */
	iowrite32(0, info->mem[0].internal_addr + DPM_HOST_INT_EN0);
	uio_unregister_device(info);
	pci_release_regions(dev);
	pci_disable_device(dev);
	iounmap(info->mem[0].internal_addr);

	kfree(info);
}

static struct pci_device_id netx_pci_ids[] = {
	{
		.vendor =	PCI_VENDOR_ID_HILSCHER,
		.device =	PCI_DEVICE_ID_HILSCHER_NETX,
		.subvendor =	0,
		.subdevice =	0,
	},
	{
		.vendor =       PCI_VENDOR_ID_HILSCHER,
		.device =       PCI_DEVICE_ID_HILSCHER_NETPLC,
		.subvendor =    PCI_VENDOR_ID_HILSCHER,
		.subdevice =    PCI_SUBDEVICE_ID_NETPLC_RAM,
	},
	{
		.vendor =       PCI_VENDOR_ID_HILSCHER,
		.device =       PCI_DEVICE_ID_HILSCHER_NETPLC,
		.subvendor =    PCI_VENDOR_ID_HILSCHER,
		.subdevice =    PCI_SUBDEVICE_ID_NETPLC_FLASH,
	},
	{
		.vendor =	PCI_VENDOR_ID_PLX,
		.device =	PCI_DEVICE_ID_PLX_9030,
		.subvendor =	PCI_VENDOR_ID_PLX,
		.subdevice =	PCI_SUBDEVICE_ID_NXSB_PCA,
	},
	{
		.vendor =	PCI_VENDOR_ID_PLX,
		.device =	PCI_DEVICE_ID_PLX_9030,
		.subvendor =	PCI_VENDOR_ID_PLX,
		.subdevice =	PCI_SUBDEVICE_ID_NXPCA,
	},
	{ 0, }
};

static struct pci_driver netx_pci_driver = {
	.name = "netx",
	.id_table = netx_pci_ids,
	.probe = netx_pci_probe,
	.remove = netx_pci_remove,
};

module_pci_driver(netx_pci_driver);
MODULE_DEVICE_TABLE(pci, netx_pci_ids);
MODULE_LICENSE("GPL v2");
MODULE_AUTHOR("Hans J. Koch, Manuel Traut");
Commit	Line	Data
bce5c2ea	1	// SPDX-License-Identifier: GPL-2.0
8f314cfc HK	2	/*
	3	* UIO driver for Hilscher NetX based fieldbus cards (cifX, comX).
	4	* See http://www.hilscher.com for details.
	5	*
318af55d	6	* (C) 2007 Hans J. Koch <[email protected]>
8f314cfc HK	7	* (C) 2008 Manuel Traut <[email protected]>
8f314cfc HK	8	*
8f314cfc HK	9	*/
	10
	11	#include <linux/device.h>
	12	#include <linux/io.h>
	13	#include <linux/module.h>
	14	#include <linux/pci.h>
5a0e3ad6	15	#include <linux/slab.h>
8f314cfc HK	16	#include <linux/uio_driver.h>
	17
	18	#define PCI_VENDOR_ID_HILSCHER 0x15CF
	19	#define PCI_DEVICE_ID_HILSCHER_NETX 0x0000
d8408aef DT	20	#define PCI_DEVICE_ID_HILSCHER_NETPLC 0x0010
	21	#define PCI_SUBDEVICE_ID_NETPLC_RAM 0x0000
	22	#define PCI_SUBDEVICE_ID_NETPLC_FLASH 0x0001
8f314cfc HK	23	#define PCI_SUBDEVICE_ID_NXSB_PCA 0x3235
	24	#define PCI_SUBDEVICE_ID_NXPCA 0x3335
	25
	26	#define DPM_HOST_INT_EN0 0xfff0
	27	#define DPM_HOST_INT_STAT0 0xffe0
	28
	29	#define DPM_HOST_INT_MASK 0xe600ffff
	30	#define DPM_HOST_INT_GLOBAL_EN 0x80000000
	31
	32	static irqreturn_t netx_handler(int irq, struct uio_info *dev_info)
	33	{
	34	void __iomem *int_enable_reg = dev_info->mem[0].internal_addr
	35	+ DPM_HOST_INT_EN0;
	36	void __iomem *int_status_reg = dev_info->mem[0].internal_addr
	37	+ DPM_HOST_INT_STAT0;
	38
	39	/* Is one of our interrupts enabled and active ? */
	40	if (!(ioread32(int_enable_reg) & ioread32(int_status_reg)
	41	& DPM_HOST_INT_MASK))
	42	return IRQ_NONE;
	43
	44	/* Disable interrupt */
	45	iowrite32(ioread32(int_enable_reg) & ~DPM_HOST_INT_GLOBAL_EN,
	46	int_enable_reg);
	47	return IRQ_HANDLED;
	48	}
	49
b17b75bb	50	static int netx_pci_probe(struct pci_dev *dev,
8f314cfc HK	51	const struct pci_device_id *id)
	52	{
	53	struct uio_info *info;
	54	int bar;
	55
	56	info = kzalloc(sizeof(struct uio_info), GFP_KERNEL);
	57	if (!info)
	58	return -ENOMEM;
	59
	60	if (pci_enable_device(dev))
	61	goto out_free;
	62
	63	if (pci_request_regions(dev, "netx"))
	64	goto out_disable;
	65
	66	switch (id->device) {
	67	case PCI_DEVICE_ID_HILSCHER_NETX:
	68	bar = 0;
	69	info->name = "netx";
	70	break;
d8408aef DT	71	case PCI_DEVICE_ID_HILSCHER_NETPLC:
	72	bar = 0;
	73	info->name = "netplc";
	74	break;
8f314cfc HK	75	default:
	76	bar = 2;
	77	info->name = "netx_plx";
	78	}
	79
	80	/* BAR0 or 2 points to the card's dual port memory */
	81	info->mem[0].addr = pci_resource_start(dev, bar);
	82	if (!info->mem[0].addr)
	83	goto out_release;
	84	info->mem[0].internal_addr = ioremap(pci_resource_start(dev, bar),
	85	pci_resource_len(dev, bar));
	86
	87	if (!info->mem[0].internal_addr)
	88	goto out_release;
	89
	90	info->mem[0].size = pci_resource_len(dev, bar);
	91	info->mem[0].memtype = UIO_MEM_PHYS;
	92	info->irq = dev->irq;
	93	info->irq_flags = IRQF_SHARED;
	94	info->handler = netx_handler;
	95	info->version = "0.0.1";
	96
	97	/* Make sure all interrupts are disabled */
	98	iowrite32(0, info->mem[0].internal_addr + DPM_HOST_INT_EN0);
	99
	100	if (uio_register_device(&dev->dev, info))
	101	goto out_unmap;
	102
	103	pci_set_drvdata(dev, info);
	104	dev_info(&dev->dev, "Found %s card, registered UIO device.\n",
	105	info->name);
	106
	107	return 0;
	108
	109	out_unmap:
	110	iounmap(info->mem[0].internal_addr);
	111	out_release:
	112	pci_release_regions(dev);
	113	out_disable:
	114	pci_disable_device(dev);
	115	out_free:
	116	kfree(info);
	117	return -ENODEV;
	118	}
	119
	120	static void netx_pci_remove(struct pci_dev *dev)
	121	{
	122	struct uio_info *info = pci_get_drvdata(dev);
	123
	124	/* Disable all interrupts */
	125	iowrite32(0, info->mem[0].internal_addr + DPM_HOST_INT_EN0);
	126	uio_unregister_device(info);
	127	pci_release_regions(dev);
	128	pci_disable_device(dev);
8f314cfc HK	129	iounmap(info->mem[0].internal_addr);
	130
	131	kfree(info);
	132	}
	133
	134	static struct pci_device_id netx_pci_ids[] = {
	135	{
	136	.vendor = PCI_VENDOR_ID_HILSCHER,
	137	.device = PCI_DEVICE_ID_HILSCHER_NETX,
	138	.subvendor = 0,
	139	.subdevice = 0,
	140	},
d8408aef DT	141	{
	142	.vendor = PCI_VENDOR_ID_HILSCHER,
	143	.device = PCI_DEVICE_ID_HILSCHER_NETPLC,
	144	.subvendor = PCI_VENDOR_ID_HILSCHER,
	145	.subdevice = PCI_SUBDEVICE_ID_NETPLC_RAM,
	146	},
	147	{
	148	.vendor = PCI_VENDOR_ID_HILSCHER,
	149	.device = PCI_DEVICE_ID_HILSCHER_NETPLC,
	150	.subvendor = PCI_VENDOR_ID_HILSCHER,
	151	.subdevice = PCI_SUBDEVICE_ID_NETPLC_FLASH,
	152	},
8f314cfc HK	153	{
	154	.vendor = PCI_VENDOR_ID_PLX,
	155	.device = PCI_DEVICE_ID_PLX_9030,
	156	.subvendor = PCI_VENDOR_ID_PLX,
	157	.subdevice = PCI_SUBDEVICE_ID_NXSB_PCA,
	158	},
	159	{
	160	.vendor = PCI_VENDOR_ID_PLX,
	161	.device = PCI_DEVICE_ID_PLX_9030,
	162	.subvendor = PCI_VENDOR_ID_PLX,
	163	.subdevice = PCI_SUBDEVICE_ID_NXPCA,
	164	},
	165	{ 0, }
	166	};
	167
	168	static struct pci_driver netx_pci_driver = {
	169	.name = "netx",
	170	.id_table = netx_pci_ids,
	171	.probe = netx_pci_probe,
	172	.remove = netx_pci_remove,
	173	};
	174
b59f9a05	175	module_pci_driver(netx_pci_driver);
8f314cfc HK	176	MODULE_DEVICE_TABLE(pci, netx_pci_ids);
	177	MODULE_LICENSE("GPL v2");
	178	MODULE_AUTHOR("Hans J. Koch, Manuel Traut");