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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 | /* * Architecture- / platform-specific boot-time initialization code for * IBM PowerPC 4xx based boards. Adapted from original * code by Gary Thomas, Cort Dougan <cort@fsmlabs.com>, and Dan Malek * <dan@net4x.com>. * * Copyright(c) 1999-2000 Grant Erickson <grant@lcse.umn.edu> * * Rewritten and ported to the merged powerpc tree: * Copyright 2007 IBM Corporation * Josh Boyer <jwboyer@linux.vnet.ibm.com> * * Adapted to EP405 by Ben. Herrenschmidt <benh@kernel.crashing.org> * * TODO: Wire up the PCI IRQ mux and the southbridge interrupts * * 2002 (c) MontaVista, Software, Inc. This file is licensed under * the terms of the GNU General Public License version 2. This program * is licensed "as is" without any warranty of any kind, whether express * or implied. */ #include <linux/init.h> #include <linux/of_platform.h> #include <asm/machdep.h> #include <asm/prom.h> #include <asm/udbg.h> #include <asm/time.h> #include <asm/uic.h> #include <asm/pci-bridge.h> #include <asm/ppc4xx.h> static struct device_node *bcsr_node; static void __iomem *bcsr_regs; /* BCSR registers */ #define BCSR_ID 0 #define BCSR_PCI_CTRL 1 #define BCSR_FLASH_NV_POR_CTRL 2 #define BCSR_FENET_UART_CTRL 3 #define BCSR_PCI_IRQ 4 #define BCSR_XIRQ_SELECT 5 #define BCSR_XIRQ_ROUTING 6 #define BCSR_XIRQ_STATUS 7 #define BCSR_XIRQ_STATUS2 8 #define BCSR_SW_STAT_LED_CTRL 9 #define BCSR_GPIO_IRQ_PAR_CTRL 10 /* there's more, can't be bothered typing them tho */ static __initdata struct of_device_id ep405_of_bus[] = { { .compatible = "ibm,plb3", }, { .compatible = "ibm,opb", }, { .compatible = "ibm,ebc", }, {}, }; static int __init ep405_device_probe(void) { of_platform_bus_probe(NULL, ep405_of_bus, NULL); return 0; } machine_device_initcall(ep405, ep405_device_probe); static void __init ep405_init_bcsr(void) { const u8 *irq_routing; int i; /* Find the bloody thing & map it */ bcsr_node = of_find_compatible_node(NULL, NULL, "ep405-bcsr"); if (bcsr_node == NULL) { printk(KERN_ERR "EP405 BCSR not found !\n"); return; } bcsr_regs = of_iomap(bcsr_node, 0); if (bcsr_regs == NULL) { printk(KERN_ERR "EP405 BCSR failed to map !\n"); return; } /* Get the irq-routing property and apply the routing to the CPLD */ irq_routing = of_get_property(bcsr_node, "irq-routing", NULL); if (irq_routing == NULL) return; for (i = 0; i < 16; i++) { u8 irq = irq_routing[i]; out_8(bcsr_regs + BCSR_XIRQ_SELECT, i); out_8(bcsr_regs + BCSR_XIRQ_ROUTING, irq); } in_8(bcsr_regs + BCSR_XIRQ_SELECT); mb(); out_8(bcsr_regs + BCSR_GPIO_IRQ_PAR_CTRL, 0xfe); } static void __init ep405_setup_arch(void) { /* Find & init the BCSR CPLD */ ep405_init_bcsr(); ppc_pci_flags = PPC_PCI_REASSIGN_ALL_RSRC; } static int __init ep405_probe(void) { unsigned long root = of_get_flat_dt_root(); if (!of_flat_dt_is_compatible(root, "ep405")) return 0; return 1; } define_machine(ep405) { .name = "EP405", .probe = ep405_probe, .setup_arch = ep405_setup_arch, .progress = udbg_progress, .init_IRQ = uic_init_tree, .get_irq = uic_get_irq, .restart = ppc4xx_reset_system, .calibrate_decr = generic_calibrate_decr, }; |