staging: comedi: move out of staging directory

The comedi code came into the kernel back in 2008, but traces its
lifetime to much much earlier.  It's been polished and buffed and
there's really nothing preventing it from being part of the "real"
portion of the kernel.

So move it to drivers/comedi/ as it belongs there.

Many thanks to the hundreds of developers who did the work to make this
happen.

Cc: Ian Abbott <abbotti@mev.co.uk>
Cc: H Hartley Sweeten <hsweeten@visionengravers.com>
Link: https://lore.kernel.org/r/YHauop4u3sP6lz8j@kroah.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 295 insertions, 0 deletions

diff --git a/drivers/comedi/drivers/8255_pci.c b/drivers/comedi/drivers/8255_pci.c
new file mode 100644
index 000000000000..5a810f0e532a
--- /dev/null
+++ b/drivers/comedi/drivers/8255_pci.c
@@ -0,0 +1,295 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * COMEDI driver for generic PCI based 8255 digital i/o boards
+ * Copyright (C) 2012 H Hartley Sweeten <hsweeten@visionengravers.com>
+ *
+ * Based on the tested adl_pci7296 driver written by:
+ *	Jon Grierson <jd@renko.co.uk>
+ * and the experimental cb_pcidio driver written by:
+ *	Yoshiya Matsuzaka
+ *
+ * COMEDI - Linux Control and Measurement Device Interface
+ * Copyright (C) 2000 David A. Schleef <ds@schleef.org>
+ */
+
+/*
+ * Driver: 8255_pci
+ * Description: Generic PCI based 8255 Digital I/O boards
+ * Devices: [ADLink] PCI-7224 (adl_pci-7224), PCI-7248 (adl_pci-7248),
+ *   PCI-7296 (adl_pci-7296),
+ *   [Measurement Computing] PCI-DIO24 (cb_pci-dio24),
+ *   PCI-DIO24H (cb_pci-dio24h), PCI-DIO48H (cb_pci-dio48h),
+ *   PCI-DIO96H (cb_pci-dio96h),
+ *   [National Instruments] PCI-DIO-96 (ni_pci-dio-96),
+ *   PCI-DIO-96B (ni_pci-dio-96b), PXI-6508 (ni_pxi-6508),
+ *   PCI-6503 (ni_pci-6503), PCI-6503B (ni_pci-6503b),
+ *   PCI-6503X (ni_pci-6503x), PXI-6503 (ni_pxi-6503)
+ * Author: H Hartley Sweeten <hsweeten@visionengravers.com>
+ * Updated: Wed, 12 Sep 2012 11:52:01 -0700
+ * Status: untested
+ *
+ * These boards have one or more 8255 digital I/O chips, each of which
+ * is supported as a separate 24-channel DIO subdevice.
+ *
+ * Boards with 24 DIO channels (1 DIO subdevice):
+ *
+ *   PCI-7224, PCI-DIO24, PCI-DIO24H, PCI-6503, PCI-6503B, PCI-6503X,
+ *   PXI-6503
+ *
+ * Boards with 48 DIO channels (2 DIO subdevices):
+ *
+ *   PCI-7248, PCI-DIO48H
+ *
+ * Boards with 96 DIO channels (4 DIO subdevices):
+ *
+ *   PCI-7296, PCI-DIO96H, PCI-DIO-96, PCI-DIO-96B, PXI-6508
+ *
+ * Some of these boards also have an 8254 programmable timer/counter
+ * chip.  This chip is not currently supported by this driver.
+ *
+ * Interrupt support for these boards is also not currently supported.
+ *
+ * Configuration Options: not applicable, uses PCI auto config.
+ */
+
+#include <linux/module.h>
+
+#include "../comedi_pci.h"
+
+#include "8255.h"
+
+enum pci_8255_boardid {
+	BOARD_ADLINK_PCI7224,
+	BOARD_ADLINK_PCI7248,
+	BOARD_ADLINK_PCI7296,
+	BOARD_CB_PCIDIO24,
+	BOARD_CB_PCIDIO24H,
+	BOARD_CB_PCIDIO48H_OLD,
+	BOARD_CB_PCIDIO48H_NEW,
+	BOARD_CB_PCIDIO96H,
+	BOARD_NI_PCIDIO96,
+	BOARD_NI_PCIDIO96B,
+	BOARD_NI_PXI6508,
+	BOARD_NI_PCI6503,
+	BOARD_NI_PCI6503B,
+	BOARD_NI_PCI6503X,
+	BOARD_NI_PXI_6503,
+};
+
+struct pci_8255_boardinfo {
+	const char *name;
+	int dio_badr;
+	int n_8255;
+	unsigned int has_mite:1;
+};
+
+static const struct pci_8255_boardinfo pci_8255_boards[] = {
+	[BOARD_ADLINK_PCI7224] = {
+		.name		= "adl_pci-7224",
+		.dio_badr	= 2,
+		.n_8255		= 1,
+	},
+	[BOARD_ADLINK_PCI7248] = {
+		.name		= "adl_pci-7248",
+		.dio_badr	= 2,
+		.n_8255		= 2,
+	},
+	[BOARD_ADLINK_PCI7296] = {
+		.name		= "adl_pci-7296",
+		.dio_badr	= 2,
+		.n_8255		= 4,
+	},
+	[BOARD_CB_PCIDIO24] = {
+		.name		= "cb_pci-dio24",
+		.dio_badr	= 2,
+		.n_8255		= 1,
+	},
+	[BOARD_CB_PCIDIO24H] = {
+		.name		= "cb_pci-dio24h",
+		.dio_badr	= 2,
+		.n_8255		= 1,
+	},
+	[BOARD_CB_PCIDIO48H_OLD] = {
+		.name		= "cb_pci-dio48h",
+		.dio_badr	= 1,
+		.n_8255		= 2,
+	},
+	[BOARD_CB_PCIDIO48H_NEW] = {
+		.name		= "cb_pci-dio48h",
+		.dio_badr	= 2,
+		.n_8255		= 2,
+	},
+	[BOARD_CB_PCIDIO96H] = {
+		.name		= "cb_pci-dio96h",
+		.dio_badr	= 2,
+		.n_8255		= 4,
+	},
+	[BOARD_NI_PCIDIO96] = {
+		.name		= "ni_pci-dio-96",
+		.dio_badr	= 1,
+		.n_8255		= 4,
+		.has_mite	= 1,
+	},
+	[BOARD_NI_PCIDIO96B] = {
+		.name		= "ni_pci-dio-96b",
+		.dio_badr	= 1,
+		.n_8255		= 4,
+		.has_mite	= 1,
+	},
+	[BOARD_NI_PXI6508] = {
+		.name		= "ni_pxi-6508",
+		.dio_badr	= 1,
+		.n_8255		= 4,
+		.has_mite	= 1,
+	},
+	[BOARD_NI_PCI6503] = {
+		.name		= "ni_pci-6503",
+		.dio_badr	= 1,
+		.n_8255		= 1,
+		.has_mite	= 1,
+	},
+	[BOARD_NI_PCI6503B] = {
+		.name		= "ni_pci-6503b",
+		.dio_badr	= 1,
+		.n_8255		= 1,
+		.has_mite	= 1,
+	},
+	[BOARD_NI_PCI6503X] = {
+		.name		= "ni_pci-6503x",
+		.dio_badr	= 1,
+		.n_8255		= 1,
+		.has_mite	= 1,
+	},
+	[BOARD_NI_PXI_6503] = {
+		.name		= "ni_pxi-6503",
+		.dio_badr	= 1,
+		.n_8255		= 1,
+		.has_mite	= 1,
+	},
+};
+
+/* ripped from mite.h and mite_setup2() to avoid mite dependency */
+#define MITE_IODWBSR	0xc0	/* IO Device Window Base Size Register */
+#define WENAB		BIT(7)	/* window enable */
+
+static int pci_8255_mite_init(struct pci_dev *pcidev)
+{
+	void __iomem *mite_base;
+	u32 main_phys_addr;
+
+	/* ioremap the MITE registers (BAR 0) temporarily */
+	mite_base = pci_ioremap_bar(pcidev, 0);
+	if (!mite_base)
+		return -ENOMEM;
+
+	/* set data window to main registers (BAR 1) */
+	main_phys_addr = pci_resource_start(pcidev, 1);
+	writel(main_phys_addr | WENAB, mite_base + MITE_IODWBSR);
+
+	/* finished with MITE registers */
+	iounmap(mite_base);
+	return 0;
+}
+
+static int pci_8255_auto_attach(struct comedi_device *dev,
+				unsigned long context)
+{
+	struct pci_dev *pcidev = comedi_to_pci_dev(dev);
+	const struct pci_8255_boardinfo *board = NULL;
+	struct comedi_subdevice *s;
+	int ret;
+	int i;
+
+	if (context < ARRAY_SIZE(pci_8255_boards))
+		board = &pci_8255_boards[context];
+	if (!board)
+		return -ENODEV;
+	dev->board_ptr = board;
+	dev->board_name = board->name;
+
+	ret = comedi_pci_enable(dev);
+	if (ret)
+		return ret;
+
+	if (board->has_mite) {
+		ret = pci_8255_mite_init(pcidev);
+		if (ret)
+			return ret;
+	}
+
+	if ((pci_resource_flags(pcidev, board->dio_badr) & IORESOURCE_MEM)) {
+		dev->mmio = pci_ioremap_bar(pcidev, board->dio_badr);
+		if (!dev->mmio)
+			return -ENOMEM;
+	} else {
+		dev->iobase = pci_resource_start(pcidev, board->dio_badr);
+	}
+
+	/*
+	 * One, two, or four subdevices are setup by this driver depending
+	 * on the number of channels provided by the board. Each subdevice
+	 * has 24 channels supported by the 8255 module.
+	 */
+	ret = comedi_alloc_subdevices(dev, board->n_8255);
+	if (ret)
+		return ret;
+
+	for (i = 0; i < board->n_8255; i++) {
+		s = &dev->subdevices[i];
+		if (dev->mmio)
+			ret = subdev_8255_mm_init(dev, s, NULL, i * I8255_SIZE);
+		else
+			ret = subdev_8255_init(dev, s, NULL, i * I8255_SIZE);
+		if (ret)
+			return ret;
+	}
+
+	return 0;
+}
+
+static struct comedi_driver pci_8255_driver = {
+	.driver_name	= "8255_pci",
+	.module		= THIS_MODULE,
+	.auto_attach	= pci_8255_auto_attach,
+	.detach		= comedi_pci_detach,
+};
+
+static int pci_8255_pci_probe(struct pci_dev *dev,
+			      const struct pci_device_id *id)
+{
+	return comedi_pci_auto_config(dev, &pci_8255_driver, id->driver_data);
+}
+
+static const struct pci_device_id pci_8255_pci_table[] = {
+	{ PCI_VDEVICE(ADLINK, 0x7224), BOARD_ADLINK_PCI7224 },
+	{ PCI_VDEVICE(ADLINK, 0x7248), BOARD_ADLINK_PCI7248 },
+	{ PCI_VDEVICE(ADLINK, 0x7296), BOARD_ADLINK_PCI7296 },
+	{ PCI_VDEVICE(CB, 0x0028), BOARD_CB_PCIDIO24 },
+	{ PCI_VDEVICE(CB, 0x0014), BOARD_CB_PCIDIO24H },
+	{ PCI_DEVICE_SUB(PCI_VENDOR_ID_CB, 0x000b, 0x0000, 0x0000),
+	  .driver_data = BOARD_CB_PCIDIO48H_OLD },
+	{ PCI_DEVICE_SUB(PCI_VENDOR_ID_CB, 0x000b, PCI_VENDOR_ID_CB, 0x000b),
+	  .driver_data = BOARD_CB_PCIDIO48H_NEW },
+	{ PCI_VDEVICE(CB, 0x0017), BOARD_CB_PCIDIO96H },
+	{ PCI_VDEVICE(NI, 0x0160), BOARD_NI_PCIDIO96 },
+	{ PCI_VDEVICE(NI, 0x1630), BOARD_NI_PCIDIO96B },
+	{ PCI_VDEVICE(NI, 0x13c0), BOARD_NI_PXI6508 },
+	{ PCI_VDEVICE(NI, 0x0400), BOARD_NI_PCI6503 },
+	{ PCI_VDEVICE(NI, 0x1250), BOARD_NI_PCI6503B },
+	{ PCI_VDEVICE(NI, 0x17d0), BOARD_NI_PCI6503X },
+	{ PCI_VDEVICE(NI, 0x1800), BOARD_NI_PXI_6503 },
+	{ 0 }
+};
+MODULE_DEVICE_TABLE(pci, pci_8255_pci_table);
+
+static struct pci_driver pci_8255_pci_driver = {
+	.name		= "8255_pci",
+	.id_table	= pci_8255_pci_table,
+	.probe		= pci_8255_pci_probe,
+	.remove		= comedi_pci_auto_unconfig,
+};
+module_comedi_pci_driver(pci_8255_driver, pci_8255_pci_driver);
+
+MODULE_DESCRIPTION("COMEDI - Generic PCI based 8255 Digital I/O boards");
+MODULE_AUTHOR("Comedi https://www.comedi.org");
+MODULE_LICENSE("GPL");