From ace9429bb58fd418f0c81d4c2835699bddf6bde6 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Thu, 11 Apr 2024 10:27:49 +0200 Subject: Adding upstream version 6.6.15. Signed-off-by: Daniel Baumann --- drivers/tc/Makefile | 8 ++ drivers/tc/tc-driver.c | 109 ++++++++++++++++++++++++++ drivers/tc/tc.c | 208 +++++++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 325 insertions(+) create mode 100644 drivers/tc/Makefile create mode 100644 drivers/tc/tc-driver.c create mode 100644 drivers/tc/tc.c (limited to 'drivers/tc') diff --git a/drivers/tc/Makefile b/drivers/tc/Makefile new file mode 100644 index 000000000..6cccaf1f6 --- /dev/null +++ b/drivers/tc/Makefile @@ -0,0 +1,8 @@ +# SPDX-License-Identifier: GPL-2.0-only +# +# Makefile for the linux kernel. +# + +# Object file lists. + +obj-$(CONFIG_TC) += tc.o tc-driver.o diff --git a/drivers/tc/tc-driver.c b/drivers/tc/tc-driver.c new file mode 100644 index 000000000..d45f2c1ff --- /dev/null +++ b/drivers/tc/tc-driver.c @@ -0,0 +1,109 @@ +/* + * TURBOchannel driver services. + * + * Copyright (c) 2005 James Simmons + * Copyright (c) 2006 Maciej W. Rozycki + * + * Loosely based on drivers/dio/dio-driver.c and + * drivers/pci/pci-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 +#include +#include + +/** + * tc_register_driver - register a new TC driver + * @drv: the driver structure to register + * + * Adds the driver structure to the list of registered drivers + * Returns a negative value on error, otherwise 0. + * If no error occurred, the driver remains registered even if + * no device was claimed during registration. + */ +int tc_register_driver(struct tc_driver *tdrv) +{ + return driver_register(&tdrv->driver); +} +EXPORT_SYMBOL(tc_register_driver); + +/** + * tc_unregister_driver - unregister a TC driver + * @drv: the driver structure to unregister + * + * Deletes the driver structure from the list of registered TC 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 tc_unregister_driver(struct tc_driver *tdrv) +{ + driver_unregister(&tdrv->driver); +} +EXPORT_SYMBOL(tc_unregister_driver); + +/** + * tc_match_device - tell if a TC device structure has a matching + * TC device ID structure + * @tdrv: the TC driver to earch for matching TC device ID strings + * @tdev: the TC device structure to match against + * + * Used by a driver to check whether a TC device present in the + * system is in its list of supported devices. Returns the matching + * tc_device_id structure or %NULL if there is no match. + */ +static const struct tc_device_id *tc_match_device(struct tc_driver *tdrv, + struct tc_dev *tdev) +{ + const struct tc_device_id *id = tdrv->id_table; + + if (id) { + while (id->name[0] || id->vendor[0]) { + if (strcmp(tdev->name, id->name) == 0 && + strcmp(tdev->vendor, id->vendor) == 0) + return id; + id++; + } + } + return NULL; +} + +/** + * tc_bus_match - Tell if a device structure has a matching + * TC device ID structure + * @dev: the device structure to match against + * @drv: the device driver to search for matching TC device ID strings + * + * Used by a driver to check whether a TC device present in the + * system is in its list of supported devices. Returns 1 if there + * is a match or 0 otherwise. + */ +static int tc_bus_match(struct device *dev, struct device_driver *drv) +{ + struct tc_dev *tdev = to_tc_dev(dev); + struct tc_driver *tdrv = to_tc_driver(drv); + const struct tc_device_id *id; + + id = tc_match_device(tdrv, tdev); + if (id) + return 1; + + return 0; +} + +struct bus_type tc_bus_type = { + .name = "tc", + .match = tc_bus_match, +}; +EXPORT_SYMBOL(tc_bus_type); + +static int __init tc_driver_init(void) +{ + return bus_register(&tc_bus_type); +} + +postcore_initcall(tc_driver_init); diff --git a/drivers/tc/tc.c b/drivers/tc/tc.c new file mode 100644 index 000000000..c5b17dd8f --- /dev/null +++ b/drivers/tc/tc.c @@ -0,0 +1,208 @@ +/* + * TURBOchannel bus services. + * + * Copyright (c) Harald Koerfgen, 1998 + * Copyright (c) 2001, 2003, 2005, 2006, 2018 Maciej W. Rozycki + * Copyright (c) 2005 James Simmons + * + * 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 +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include + +static struct tc_bus tc_bus = { + .name = "TURBOchannel", +}; + +/* + * Probing for TURBOchannel modules. + */ +static void __init tc_bus_add_devices(struct tc_bus *tbus) +{ + resource_size_t slotsize = tbus->info.slot_size << 20; + resource_size_t extslotsize = tbus->ext_slot_size; + resource_size_t slotaddr; + resource_size_t extslotaddr; + resource_size_t devsize; + void __iomem *module; + struct tc_dev *tdev; + int i, slot, err; + u8 pattern[4]; + long offset; + + for (slot = 0; slot < tbus->num_tcslots; slot++) { + slotaddr = tbus->slot_base + slot * slotsize; + extslotaddr = tbus->ext_slot_base + slot * extslotsize; + module = ioremap(slotaddr, slotsize); + BUG_ON(!module); + + offset = TC_OLDCARD; + + err = 0; + err |= tc_preadb(pattern + 0, module + offset + TC_PATTERN0); + err |= tc_preadb(pattern + 1, module + offset + TC_PATTERN1); + err |= tc_preadb(pattern + 2, module + offset + TC_PATTERN2); + err |= tc_preadb(pattern + 3, module + offset + TC_PATTERN3); + if (err) + goto out_err; + + if (pattern[0] != 0x55 || pattern[1] != 0x00 || + pattern[2] != 0xaa || pattern[3] != 0xff) { + offset = TC_NEWCARD; + + err = 0; + err |= tc_preadb(pattern + 0, + module + offset + TC_PATTERN0); + err |= tc_preadb(pattern + 1, + module + offset + TC_PATTERN1); + err |= tc_preadb(pattern + 2, + module + offset + TC_PATTERN2); + err |= tc_preadb(pattern + 3, + module + offset + TC_PATTERN3); + if (err) + goto out_err; + } + + if (pattern[0] != 0x55 || pattern[1] != 0x00 || + pattern[2] != 0xaa || pattern[3] != 0xff) + goto out_err; + + /* Found a board, allocate it an entry in the list */ + tdev = kzalloc(sizeof(*tdev), GFP_KERNEL); + if (!tdev) { + pr_err("tc%x: unable to allocate tc_dev\n", slot); + goto out_err; + } + dev_set_name(&tdev->dev, "tc%x", slot); + tdev->bus = tbus; + tdev->dev.parent = &tbus->dev; + tdev->dev.bus = &tc_bus_type; + tdev->slot = slot; + + /* TURBOchannel has 34-bit DMA addressing (16GiB space). */ + tdev->dma_mask = DMA_BIT_MASK(34); + tdev->dev.dma_mask = &tdev->dma_mask; + tdev->dev.coherent_dma_mask = DMA_BIT_MASK(34); + + for (i = 0; i < 8; i++) { + tdev->firmware[i] = + readb(module + offset + TC_FIRM_VER + 4 * i); + tdev->vendor[i] = + readb(module + offset + TC_VENDOR + 4 * i); + tdev->name[i] = + readb(module + offset + TC_MODULE + 4 * i); + } + tdev->firmware[8] = 0; + tdev->vendor[8] = 0; + tdev->name[8] = 0; + + pr_info("%s: %s %s %s\n", dev_name(&tdev->dev), tdev->vendor, + tdev->name, tdev->firmware); + + devsize = readb(module + offset + TC_SLOT_SIZE); + devsize <<= 22; + if (devsize <= slotsize) { + tdev->resource.start = slotaddr; + tdev->resource.end = slotaddr + devsize - 1; + } else if (devsize <= extslotsize) { + tdev->resource.start = extslotaddr; + tdev->resource.end = extslotaddr + devsize - 1; + } else { + pr_err("%s: Cannot provide slot space " + "(%ldMiB required, up to %ldMiB supported)\n", + dev_name(&tdev->dev), (long)(devsize >> 20), + (long)(max(slotsize, extslotsize) >> 20)); + kfree(tdev); + goto out_err; + } + tdev->resource.name = tdev->name; + tdev->resource.flags = IORESOURCE_MEM; + + tc_device_get_irq(tdev); + + if (device_register(&tdev->dev)) { + put_device(&tdev->dev); + goto out_err; + } + list_add_tail(&tdev->node, &tbus->devices); + +out_err: + iounmap(module); + } +} + +/* + * The main entry. + */ +static int __init tc_init(void) +{ + /* Initialize the TURBOchannel bus */ + if (tc_bus_get_info(&tc_bus)) + goto out_err; + + INIT_LIST_HEAD(&tc_bus.devices); + dev_set_name(&tc_bus.dev, "tc"); + if (device_register(&tc_bus.dev)) + goto out_err_device; + + if (tc_bus.info.slot_size) { + unsigned int tc_clock = tc_get_speed(&tc_bus) / 100000; + + pr_info("tc: TURBOchannel rev. %d at %d.%d MHz " + "(with%s parity)\n", tc_bus.info.revision, + tc_clock / 10, tc_clock % 10, + tc_bus.info.parity ? "" : "out"); + + tc_bus.resource[0].start = tc_bus.slot_base; + tc_bus.resource[0].end = tc_bus.slot_base + + (tc_bus.info.slot_size << 20) * + tc_bus.num_tcslots - 1; + tc_bus.resource[0].name = tc_bus.name; + tc_bus.resource[0].flags = IORESOURCE_MEM; + if (request_resource(&iomem_resource, + &tc_bus.resource[0]) < 0) { + pr_err("tc: Cannot reserve resource\n"); + goto out_err_device; + } + if (tc_bus.ext_slot_size) { + tc_bus.resource[1].start = tc_bus.ext_slot_base; + tc_bus.resource[1].end = tc_bus.ext_slot_base + + tc_bus.ext_slot_size * + tc_bus.num_tcslots - 1; + tc_bus.resource[1].name = tc_bus.name; + tc_bus.resource[1].flags = IORESOURCE_MEM; + if (request_resource(&iomem_resource, + &tc_bus.resource[1]) < 0) { + pr_err("tc: Cannot reserve resource\n"); + goto out_err_resource; + } + } + + tc_bus_add_devices(&tc_bus); + } + + return 0; + +out_err_resource: + release_resource(&tc_bus.resource[0]); +out_err_device: + put_device(&tc_bus.dev); +out_err: + return 0; +} + +subsys_initcall(tc_init); -- cgit v1.2.3