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-rw-r--r--drivers/dio/Makefile6
-rw-r--r--drivers/dio/dio-driver.c142
-rw-r--r--drivers/dio/dio-sysfs.c82
-rw-r--r--drivers/dio/dio.c287
4 files changed, 517 insertions, 0 deletions
diff --git a/drivers/dio/Makefile b/drivers/dio/Makefile
new file mode 100644
index 0000000000..11202f2bb2
--- /dev/null
+++ b/drivers/dio/Makefile
@@ -0,0 +1,6 @@
+# SPDX-License-Identifier: GPL-2.0-only
+#
+# Makefile for the linux kernel.
+#
+
+obj-y := dio.o dio-driver.o dio-sysfs.o
diff --git a/drivers/dio/dio-driver.c b/drivers/dio/dio-driver.c
new file mode 100644
index 0000000000..69c46935ff
--- /dev/null
+++ b/drivers/dio/dio-driver.c
@@ -0,0 +1,142 @@
+/*
+ * DIO Driver Services
+ *
+ * Copyright (C) 2004 Jochen Friedrich
+ *
+ * Loosely based on drivers/pci/pci-driver.c and drivers/zorro/zorro-driver.c
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file COPYING in the main directory of this archive
+ * for more details.
+ */
+
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/dio.h>
+
+
+/**
+ * dio_match_device - Tell if a DIO device structure has a matching DIO device id structure
+ * @ids: array of DIO device id structures to search in
+ * @d: the DIO device structure to match against
+ *
+ * Used by a driver to check whether a DIO device present in the
+ * system is in its list of supported devices. Returns the matching
+ * dio_device_id structure or %NULL if there is no match.
+ */
+
+static const struct dio_device_id *
+dio_match_device(const struct dio_device_id *ids,
+ const struct dio_dev *d)
+{
+ while (ids->id) {
+ if (ids->id == DIO_WILDCARD)
+ return ids;
+ if (DIO_NEEDSSECID(ids->id & 0xff)) {
+ if (ids->id == d->id)
+ return ids;
+ } else {
+ if ((ids->id & 0xff) == (d->id & 0xff))
+ return ids;
+ }
+ ids++;
+ }
+ return NULL;
+}
+
+static int dio_device_probe(struct device *dev)
+{
+ int error = 0;
+ struct dio_driver *drv = to_dio_driver(dev->driver);
+ struct dio_dev *d = to_dio_dev(dev);
+
+ if (!d->driver && drv->probe) {
+ const struct dio_device_id *id;
+
+ id = dio_match_device(drv->id_table, d);
+ if (id)
+ error = drv->probe(d, id);
+ if (error >= 0) {
+ d->driver = drv;
+ error = 0;
+ }
+ }
+ return error;
+}
+
+
+/**
+ * dio_register_driver - register a new DIO driver
+ * @drv: the driver structure to register
+ *
+ * Adds the driver structure to the list of registered drivers
+ * Returns zero or a negative error value.
+ */
+
+int dio_register_driver(struct dio_driver *drv)
+{
+ /* initialize common driver fields */
+ drv->driver.name = drv->name;
+ drv->driver.bus = &dio_bus_type;
+
+ /* register with core */
+ return driver_register(&drv->driver);
+}
+
+
+/**
+ * dio_unregister_driver - unregister a DIO driver
+ * @drv: the driver structure to unregister
+ *
+ * Deletes the driver structure from the list of registered DIO drivers,
+ * gives it a chance to clean up by calling its remove() function for
+ * each device it was responsible for, and marks those devices as
+ * driverless.
+ */
+
+void dio_unregister_driver(struct dio_driver *drv)
+{
+ driver_unregister(&drv->driver);
+}
+
+
+/**
+ * dio_bus_match - Tell if a DIO device structure has a matching DIO device id structure
+ * @dev: the DIO device structure to match against
+ * @drv: the &device_driver that points to the array of DIO device id structures to search
+ *
+ * Used by the driver core to check whether a DIO device present in the
+ * system is in a driver's list of supported devices. Returns 1 if supported,
+ * and 0 if there is no match.
+ */
+
+static int dio_bus_match(struct device *dev, struct device_driver *drv)
+{
+ struct dio_dev *d = to_dio_dev(dev);
+ struct dio_driver *dio_drv = to_dio_driver(drv);
+ const struct dio_device_id *ids = dio_drv->id_table;
+
+ if (!ids)
+ return 0;
+
+ return dio_match_device(ids, d) ? 1 : 0;
+}
+
+
+struct bus_type dio_bus_type = {
+ .name = "dio",
+ .match = dio_bus_match,
+ .probe = dio_device_probe,
+};
+
+
+static int __init dio_driver_init(void)
+{
+ return bus_register(&dio_bus_type);
+}
+
+postcore_initcall(dio_driver_init);
+
+EXPORT_SYMBOL(dio_register_driver);
+EXPORT_SYMBOL(dio_unregister_driver);
+EXPORT_SYMBOL(dio_bus_type);
diff --git a/drivers/dio/dio-sysfs.c b/drivers/dio/dio-sysfs.c
new file mode 100644
index 0000000000..ee1a3b59bd
--- /dev/null
+++ b/drivers/dio/dio-sysfs.c
@@ -0,0 +1,82 @@
+/*
+ * File Attributes for DIO Devices
+ *
+ * Copyright (C) 2004 Jochen Friedrich
+ *
+ * Loosely based on drivers/pci/pci-sysfs.c and drivers/zorro/zorro-sysfs.c
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file COPYING in the main directory of this archive
+ * for more details.
+ */
+
+
+#include <linux/kernel.h>
+#include <linux/dio.h>
+#include <linux/stat.h>
+
+/* show configuration fields */
+
+static ssize_t dio_show_id(struct device *dev, struct device_attribute *attr, char *buf)
+{
+ struct dio_dev *d;
+
+ d = to_dio_dev(dev);
+ return sprintf(buf, "0x%02x\n", (d->id & 0xff));
+}
+static DEVICE_ATTR(id, S_IRUGO, dio_show_id, NULL);
+
+static ssize_t dio_show_ipl(struct device *dev, struct device_attribute *attr, char *buf)
+{
+ struct dio_dev *d;
+
+ d = to_dio_dev(dev);
+ return sprintf(buf, "0x%02x\n", d->ipl);
+}
+static DEVICE_ATTR(ipl, S_IRUGO, dio_show_ipl, NULL);
+
+static ssize_t dio_show_secid(struct device *dev, struct device_attribute *attr, char *buf)
+{
+ struct dio_dev *d;
+
+ d = to_dio_dev(dev);
+ return sprintf(buf, "0x%02x\n", ((d->id >> 8)& 0xff));
+}
+static DEVICE_ATTR(secid, S_IRUGO, dio_show_secid, NULL);
+
+static ssize_t dio_show_name(struct device *dev, struct device_attribute *attr, char *buf)
+{
+ struct dio_dev *d;
+
+ d = to_dio_dev(dev);
+ return sprintf(buf, "%s\n", d->name);
+}
+static DEVICE_ATTR(name, S_IRUGO, dio_show_name, NULL);
+
+static ssize_t dio_show_resource(struct device *dev, struct device_attribute *attr, char *buf)
+{
+ struct dio_dev *d = to_dio_dev(dev);
+
+ return sprintf(buf, "0x%08lx 0x%08lx 0x%08lx\n",
+ (unsigned long)dio_resource_start(d),
+ (unsigned long)dio_resource_end(d),
+ dio_resource_flags(d));
+}
+static DEVICE_ATTR(resource, S_IRUGO, dio_show_resource, NULL);
+
+int dio_create_sysfs_dev_files(struct dio_dev *d)
+{
+ struct device *dev = &d->dev;
+ int error;
+
+ /* current configuration's attributes */
+ if ((error = device_create_file(dev, &dev_attr_id)) ||
+ (error = device_create_file(dev, &dev_attr_ipl)) ||
+ (error = device_create_file(dev, &dev_attr_secid)) ||
+ (error = device_create_file(dev, &dev_attr_name)) ||
+ (error = device_create_file(dev, &dev_attr_resource)))
+ return error;
+
+ return 0;
+}
+
diff --git a/drivers/dio/dio.c b/drivers/dio/dio.c
new file mode 100644
index 0000000000..0a051d6568
--- /dev/null
+++ b/drivers/dio/dio.c
@@ -0,0 +1,287 @@
+// SPDX-License-Identifier: GPL-2.0
+/* Code to support devices on the DIO and DIO-II bus
+ * Copyright (C) 05/1998 Peter Maydell <pmaydell@chiark.greenend.org.uk>
+ * Copyright (C) 2004 Jochen Friedrich <jochen@scram.de>
+ *
+ * This code has basically these routines at the moment:
+ * int dio_find(u_int deviceid)
+ * Search the list of DIO devices and return the select code
+ * of the next unconfigured device found that matches the given device ID.
+ * Note that the deviceid parameter should be the encoded ID.
+ * This means that framebuffers should pass it as
+ * DIO_ENCODE_ID(DIO_ID_FBUFFER,DIO_ID2_TOPCAT)
+ * (or whatever); everybody else just uses DIO_ID_FOOBAR.
+ * unsigned long dio_scodetophysaddr(int scode)
+ * Return the physical address corresponding to the given select code.
+ * int dio_scodetoipl(int scode)
+ * Every DIO card has a fixed interrupt priority level. This function
+ * returns it, whatever it is.
+ * const char *dio_scodetoname(int scode)
+ * Return a character string describing this board [might be "" if
+ * not CONFIG_DIO_CONSTANTS]
+ * void dio_config_board(int scode) mark board as configured in the list
+ * void dio_unconfig_board(int scode) mark board as no longer configured
+ *
+ * This file is based on the way the Amiga port handles Zorro II cards,
+ * although we aren't so complicated...
+ */
+#include <linux/module.h>
+#include <linux/string.h>
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/dio.h>
+#include <linux/slab.h> /* kmalloc() */
+#include <linux/uaccess.h>
+#include <linux/io.h> /* readb() */
+
+struct dio_bus dio_bus = {
+ .resources = {
+ /* DIO range */
+ { .name = "DIO mem", .start = 0x00600000, .end = 0x007fffff },
+ /* DIO-II range */
+ { .name = "DIO-II mem", .start = 0x01000000, .end = 0x1fffffff }
+ },
+ .name = "DIO bus"
+};
+
+/* not a real config option yet! */
+#define CONFIG_DIO_CONSTANTS
+
+#ifdef CONFIG_DIO_CONSTANTS
+/* We associate each numeric ID with an appropriate descriptive string
+ * using a constant array of these structs.
+ * FIXME: we should be able to arrange to throw away most of the strings
+ * using the initdata stuff. Then we wouldn't need to worry about
+ * carrying them around...
+ * I think we do this by copying them into newly kmalloc()ed memory and
+ * marking the names[] array as .initdata ?
+ */
+struct dioname {
+ int id;
+ const char *name;
+};
+
+/* useful macro */
+#define DIONAME(x) { DIO_ID_##x, DIO_DESC_##x }
+#define DIOFBNAME(x) { DIO_ENCODE_ID(DIO_ID_FBUFFER, DIO_ID2_##x), DIO_DESC2_##x }
+
+static struct dioname names[] = {
+ DIONAME(DCA0), DIONAME(DCA0REM), DIONAME(DCA1), DIONAME(DCA1REM),
+ DIONAME(DCM), DIONAME(DCMREM),
+ DIONAME(LAN),
+ DIONAME(FHPIB), DIONAME(NHPIB),
+ DIONAME(SCSI0), DIONAME(SCSI1), DIONAME(SCSI2), DIONAME(SCSI3),
+ DIONAME(FBUFFER),
+ DIONAME(PARALLEL), DIONAME(VME), DIONAME(DCL), DIONAME(DCLREM),
+ DIONAME(MISC0), DIONAME(MISC1), DIONAME(MISC2), DIONAME(MISC3),
+ DIONAME(MISC4), DIONAME(MISC5), DIONAME(MISC6), DIONAME(MISC7),
+ DIONAME(MISC8), DIONAME(MISC9), DIONAME(MISC10), DIONAME(MISC11),
+ DIONAME(MISC12), DIONAME(MISC13),
+ DIOFBNAME(GATORBOX), DIOFBNAME(TOPCAT), DIOFBNAME(RENAISSANCE),
+ DIOFBNAME(LRCATSEYE), DIOFBNAME(HRCCATSEYE), DIOFBNAME(HRMCATSEYE),
+ DIOFBNAME(DAVINCI), DIOFBNAME(XXXCATSEYE), DIOFBNAME(HYPERION),
+ DIOFBNAME(XGENESIS), DIOFBNAME(TIGER), DIOFBNAME(YGENESIS)
+};
+
+#undef DIONAME
+#undef DIOFBNAME
+
+static const char unknowndioname[]
+ = "unknown DIO board, please email linux-m68k@lists.linux-m68k.org";
+
+static const char *dio_getname(int id)
+{
+ /* return pointer to a constant string describing the board with given ID */
+ unsigned int i;
+
+ for (i = 0; i < ARRAY_SIZE(names); i++)
+ if (names[i].id == id)
+ return names[i].name;
+
+ return unknowndioname;
+}
+
+#else
+
+static char dio_no_name[] = { 0 };
+#define dio_getname(_id) (dio_no_name)
+
+#endif /* CONFIG_DIO_CONSTANTS */
+
+static void dio_dev_release(struct device *dev)
+{
+ struct dio_dev *ddev = container_of(dev, typeof(struct dio_dev), dev);
+ kfree(ddev);
+}
+
+int __init dio_find(int deviceid)
+{
+ /* Called to find a DIO device before the full bus scan has run.
+ * Only used by the console driver.
+ */
+ int scode, id;
+ u_char prid, secid, i;
+
+ for (scode = 0; scode < DIO_SCMAX; scode++) {
+ void *va;
+ unsigned long pa;
+
+ if (DIO_SCINHOLE(scode))
+ continue;
+
+ pa = dio_scodetophysaddr(scode);
+
+ if (!pa)
+ continue;
+
+ if (scode < DIOII_SCBASE)
+ va = (void *)(pa + DIO_VIRADDRBASE);
+ else
+ va = ioremap(pa, PAGE_SIZE);
+
+ if (copy_from_kernel_nofault(&i,
+ (unsigned char *)va + DIO_IDOFF, 1)) {
+ if (scode >= DIOII_SCBASE)
+ iounmap(va);
+ continue; /* no board present at that select code */
+ }
+
+ prid = DIO_ID(va);
+
+ if (DIO_NEEDSSECID(prid)) {
+ secid = DIO_SECID(va);
+ id = DIO_ENCODE_ID(prid, secid);
+ } else
+ id = prid;
+
+ if (id == deviceid) {
+ if (scode >= DIOII_SCBASE)
+ iounmap(va);
+ return scode;
+ }
+ }
+
+ return -1;
+}
+
+/* This is the function that scans the DIO space and works out what
+ * hardware is actually present.
+ */
+static int __init dio_init(void)
+{
+ int scode;
+ int i;
+ struct dio_dev *dev;
+ int error;
+
+ if (!MACH_IS_HP300)
+ return 0;
+
+ printk(KERN_INFO "Scanning for DIO devices...\n");
+
+ /* Initialize the DIO bus */
+ INIT_LIST_HEAD(&dio_bus.devices);
+ dev_set_name(&dio_bus.dev, "dio");
+ error = device_register(&dio_bus.dev);
+ if (error) {
+ pr_err("DIO: Error registering dio_bus\n");
+ return error;
+ }
+
+ /* Request all resources */
+ dio_bus.num_resources = (hp300_model == HP_320 ? 1 : 2);
+ for (i = 0; i < dio_bus.num_resources; i++)
+ request_resource(&iomem_resource, &dio_bus.resources[i]);
+
+ /* Register all devices */
+ for (scode = 0; scode < DIO_SCMAX; ++scode) {
+ u_char prid, secid = 0; /* primary, secondary ID bytes */
+ u_char *va;
+ unsigned long pa;
+
+ if (DIO_SCINHOLE(scode))
+ continue;
+
+ pa = dio_scodetophysaddr(scode);
+
+ if (!pa)
+ continue;
+
+ if (scode < DIOII_SCBASE)
+ va = (void *)(pa + DIO_VIRADDRBASE);
+ else
+ va = ioremap(pa, PAGE_SIZE);
+
+ if (copy_from_kernel_nofault(&i,
+ (unsigned char *)va + DIO_IDOFF, 1)) {
+ if (scode >= DIOII_SCBASE)
+ iounmap(va);
+ continue; /* no board present at that select code */
+ }
+
+ /* Found a board, allocate it an entry in the list */
+ dev = kzalloc(sizeof(struct dio_dev), GFP_KERNEL);
+ if (!dev) {
+ if (scode >= DIOII_SCBASE)
+ iounmap(va);
+ return -ENOMEM;
+ }
+
+ dev->bus = &dio_bus;
+ dev->dev.parent = &dio_bus.dev;
+ dev->dev.bus = &dio_bus_type;
+ dev->dev.release = dio_dev_release;
+ dev->scode = scode;
+ dev->resource.start = pa;
+ dev->resource.end = pa + DIO_SIZE(scode, va);
+ dev_set_name(&dev->dev, "%02x", scode);
+
+ /* read the ID byte(s) and encode if necessary. */
+ prid = DIO_ID(va);
+
+ if (DIO_NEEDSSECID(prid)) {
+ secid = DIO_SECID(va);
+ dev->id = DIO_ENCODE_ID(prid, secid);
+ } else
+ dev->id = prid;
+
+ dev->ipl = DIO_IPL(va);
+ strcpy(dev->name, dio_getname(dev->id));
+ printk(KERN_INFO "select code %3d: ipl %d: ID %02X", dev->scode, dev->ipl, prid);
+ if (DIO_NEEDSSECID(prid))
+ printk(":%02X", secid);
+ printk(": %s\n", dev->name);
+
+ if (scode >= DIOII_SCBASE)
+ iounmap(va);
+ error = device_register(&dev->dev);
+ if (error) {
+ pr_err("DIO: Error registering device %s\n",
+ dev->name);
+ put_device(&dev->dev);
+ continue;
+ }
+ error = dio_create_sysfs_dev_files(dev);
+ if (error)
+ dev_err(&dev->dev, "Error creating sysfs files\n");
+ }
+ return 0;
+}
+
+subsys_initcall(dio_init);
+
+/* Bear in mind that this is called in the very early stages of initialisation
+ * in order to get the address of the serial port for the console...
+ */
+unsigned long dio_scodetophysaddr(int scode)
+{
+ if (scode >= DIOII_SCBASE)
+ return (DIOII_BASE + (scode - 132) * DIOII_DEVSIZE);
+ else if (scode > DIO_SCMAX || scode < 0)
+ return 0;
+ else if (DIO_SCINHOLE(scode))
+ return 0;
+
+ return (DIO_BASE + scode * DIO_DEVSIZE);
+}
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