| Josh Boyer | 8105fa8 | 2008-09-03 20:58:22 -0400 | [diff] [blame^] | 1 | /* |
| 2 | * Generic PowerPC 40x platform support |
| 3 | * |
| 4 | * Copyright 2008 IBM Corporation |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify it |
| 7 | * under the terms of the GNU General Public License as published by the |
| 8 | * Free Software Foundation; version 2 of the License. |
| 9 | * |
| 10 | * This implements simple platform support for PowerPC 44x chips. This is |
| 11 | * mostly used for eval boards or other simple and "generic" 44x boards. If |
| 12 | * your board has custom functions or hardware, then you will likely want to |
| 13 | * implement your own board.c file to accommodate it. |
| 14 | */ |
| 15 | |
| 16 | #include <asm/machdep.h> |
| 17 | #include <asm/pci-bridge.h> |
| 18 | #include <asm/ppc4xx.h> |
| 19 | #include <asm/prom.h> |
| 20 | #include <asm/time.h> |
| 21 | #include <asm/udbg.h> |
| 22 | #include <asm/uic.h> |
| 23 | |
| 24 | #include <linux/init.h> |
| 25 | #include <linux/of_platform.h> |
| 26 | |
| 27 | static __initdata struct of_device_id ppc40x_of_bus[] = { |
| 28 | { .compatible = "ibm,plb3", }, |
| 29 | { .compatible = "ibm,plb4", }, |
| 30 | { .compatible = "ibm,opb", }, |
| 31 | { .compatible = "ibm,ebc", }, |
| 32 | { .compatible = "simple-bus", }, |
| 33 | {}, |
| 34 | }; |
| 35 | |
| 36 | static int __init ppc40x_device_probe(void) |
| 37 | { |
| 38 | of_platform_bus_probe(NULL, ppc40x_of_bus, NULL); |
| 39 | |
| 40 | return 0; |
| 41 | } |
| 42 | machine_device_initcall(ppc40x_simple, ppc40x_device_probe); |
| 43 | |
| 44 | /* This is the list of boards that can be supported by this simple |
| 45 | * platform code. This does _not_ mean the boards are compatible, |
| 46 | * as they most certainly are not from a device tree perspective. |
| 47 | * However, their differences are handled by the device tree and the |
| 48 | * drivers and therefore they don't need custom board support files. |
| 49 | * |
| 50 | * Again, if your board needs to do things differently then create a |
| 51 | * board.c file for it rather than adding it to this list. |
| 52 | */ |
| 53 | static char *board[] __initdata = { |
| 54 | "amcc,acadia" |
| 55 | }; |
| 56 | |
| 57 | static int __init ppc40x_probe(void) |
| 58 | { |
| 59 | unsigned long root = of_get_flat_dt_root(); |
| 60 | int i = 0; |
| 61 | |
| 62 | for (i = 0; i < ARRAY_SIZE(board); i++) { |
| 63 | if (of_flat_dt_is_compatible(root, board[i])) { |
| 64 | ppc_pci_flags = PPC_PCI_REASSIGN_ALL_RSRC; |
| 65 | return 1; |
| 66 | } |
| 67 | } |
| 68 | |
| 69 | return 0; |
| 70 | } |
| 71 | |
| 72 | define_machine(ppc40x_simple) { |
| 73 | .name = "PowerPC 40x Platform", |
| 74 | .probe = ppc40x_probe, |
| 75 | .progress = udbg_progress, |
| 76 | .init_IRQ = uic_init_tree, |
| 77 | .get_irq = uic_get_irq, |
| 78 | .restart = ppc4xx_reset_system, |
| 79 | .calibrate_decr = generic_calibrate_decr, |
| 80 | }; |