^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) //
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) // Bus implementation for the NuBus subsystem.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) //
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) // Copyright (C) 2017 Finn Thain
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) #include <linux/device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) #include <linux/dma-mapping.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include <linux/list.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/nubus.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/seq_file.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #define to_nubus_board(d) container_of(d, struct nubus_board, dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #define to_nubus_driver(d) container_of(d, struct nubus_driver, driver)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) static int nubus_bus_match(struct device *dev, struct device_driver *driver)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) static int nubus_device_probe(struct device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) struct nubus_driver *ndrv = to_nubus_driver(dev->driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) int err = -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) if (ndrv->probe)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) err = ndrv->probe(to_nubus_board(dev));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) static int nubus_device_remove(struct device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) struct nubus_driver *ndrv = to_nubus_driver(dev->driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) int err = -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) if (dev->driver && ndrv->remove)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) err = ndrv->remove(to_nubus_board(dev));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) struct bus_type nubus_bus_type = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) .name = "nubus",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) .match = nubus_bus_match,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) .probe = nubus_device_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) .remove = nubus_device_remove,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) EXPORT_SYMBOL(nubus_bus_type);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) int nubus_driver_register(struct nubus_driver *ndrv)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) ndrv->driver.bus = &nubus_bus_type;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) return driver_register(&ndrv->driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) EXPORT_SYMBOL(nubus_driver_register);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) void nubus_driver_unregister(struct nubus_driver *ndrv)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) driver_unregister(&ndrv->driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) EXPORT_SYMBOL(nubus_driver_unregister);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) static struct device nubus_parent = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) .init_name = "nubus",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) static int __init nubus_bus_register(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) return bus_register(&nubus_bus_type);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) postcore_initcall(nubus_bus_register);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) int __init nubus_parent_device_register(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) return device_register(&nubus_parent);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) static void nubus_device_release(struct device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) struct nubus_board *board = to_nubus_board(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) struct nubus_rsrc *fres, *tmp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) list_for_each_entry_safe(fres, tmp, &nubus_func_rsrcs, list)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) if (fres->board == board) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) list_del(&fres->list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) kfree(fres);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) kfree(board);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) int nubus_device_register(struct nubus_board *board)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) board->dev.parent = &nubus_parent;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) board->dev.release = nubus_device_release;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) board->dev.bus = &nubus_bus_type;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) dev_set_name(&board->dev, "slot.%X", board->slot);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) board->dev.dma_mask = &board->dev.coherent_dma_mask;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) dma_set_mask(&board->dev, DMA_BIT_MASK(32));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) return device_register(&board->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) static int nubus_print_device_name_fn(struct device *dev, void *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) struct nubus_board *board = to_nubus_board(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) struct seq_file *m = data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) seq_printf(m, "Slot %X: %s\n", board->slot, board->name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) int nubus_proc_show(struct seq_file *m, void *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) return bus_for_each_dev(&nubus_bus_type, NULL, m,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) nubus_print_device_name_fn);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) }
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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