projects / GitHub / mt8127 / android_kernel_alcatel_ttab.git / blame
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| 61974038 BH |
1 | /* |
| 2 | * Architecture- / platform-specific boot-time initialization code for | |
| 3 | * IBM PowerPC 4xx based boards. Adapted from original | |
| 4 | * code by Gary Thomas, Cort Dougan <cort@fsmlabs.com>, and Dan Malek | |
| 5 | * <dan@net4x.com>. | |
| 6 | * | |
| 7 | * Copyright(c) 1999-2000 Grant Erickson <grant@lcse.umn.edu> | |
| 8 | * | |
| 9 | * Rewritten and ported to the merged powerpc tree: | |
| 10 | * Copyright 2007 IBM Corporation | |
| 11 | * Josh Boyer <jwboyer@linux.vnet.ibm.com> | |
| 12 | * | |
| 13 | * Adapted to EP405 by Ben. Herrenschmidt <benh@kernel.crashing.org> | |
| 14 | * | |
| 15 | * TODO: Wire up the PCI IRQ mux and the southbridge interrupts | |
| 16 | * | |
| 17 | * 2002 (c) MontaVista, Software, Inc. This file is licensed under | |
| 18 | * the terms of the GNU General Public License version 2. This program | |
| 19 | * is licensed "as is" without any warranty of any kind, whether express | |
| 20 | * or implied. | |
| 21 | */ | |
| 22 | ||
| 23 | #include <linux/init.h> | |
| 24 | #include <linux/of_platform.h> | |
| 25 | ||
| 26 | #include <asm/machdep.h> | |
| 27 | #include <asm/prom.h> | |
| 28 | #include <asm/udbg.h> | |
| 29 | #include <asm/time.h> | |
| 30 | #include <asm/uic.h> | |
| 31 | #include <asm/pci-bridge.h> | |
| 93173ce2 | 32 | #include <asm/ppc4xx.h> |
| 61974038 BH |
33 | |
| 34 | static struct device_node *bcsr_node; | |
| 35 | static void __iomem *bcsr_regs; | |
| 36 | ||
| 37 | /* BCSR registers */ | |
| 38 | #define BCSR_ID 0 | |
| 39 | #define BCSR_PCI_CTRL 1 | |
| 40 | #define BCSR_FLASH_NV_POR_CTRL 2 | |
| 41 | #define BCSR_FENET_UART_CTRL 3 | |
| 42 | #define BCSR_PCI_IRQ 4 | |
| 43 | #define BCSR_XIRQ_SELECT 5 | |
| 44 | #define BCSR_XIRQ_ROUTING 6 | |
| 45 | #define BCSR_XIRQ_STATUS 7 | |
| 46 | #define BCSR_XIRQ_STATUS2 8 | |
| 47 | #define BCSR_SW_STAT_LED_CTRL 9 | |
| 48 | #define BCSR_GPIO_IRQ_PAR_CTRL 10 | |
| 49 | /* there's more, can't be bothered typing them tho */ | |
| 50 | ||
| 51 | ||
| 8cb34d29 | 52 | static __initdata struct of_device_id ep405_of_bus[] = { |
| 61974038 BH |
53 | { .compatible = "ibm,plb3", }, |
| 54 | { .compatible = "ibm,opb", }, | |
| 55 | { .compatible = "ibm,ebc", }, | |
| 56 | {}, | |
| 57 | }; | |
| 58 | ||
| 59 | static int __init ep405_device_probe(void) | |
| 60 | { | |
| 61974038 BH |
61 | of_platform_bus_probe(NULL, ep405_of_bus, NULL); |
| 62 | ||
| 63 | return 0; | |
| 64 | } | |
| 3f8c5c3b | 65 | machine_device_initcall(ep405, ep405_device_probe); |
| 61974038 BH |
66 | |
| 67 | static void __init ep405_init_bcsr(void) | |
| 68 | { | |
| 69 | const u8 *irq_routing; | |
| 70 | int i; | |
| 71 | ||
| 72 | /* Find the bloody thing & map it */ | |
| 73 | bcsr_node = of_find_compatible_node(NULL, NULL, "ep405-bcsr"); | |
| 74 | if (bcsr_node == NULL) { | |
| 75 | printk(KERN_ERR "EP405 BCSR not found !\n"); | |
| 76 | return; | |
| 77 | } | |
| 78 | bcsr_regs = of_iomap(bcsr_node, 0); | |
| 79 | if (bcsr_regs == NULL) { | |
| 80 | printk(KERN_ERR "EP405 BCSR failed to map !\n"); | |
| 81 | return; | |
| 82 | } | |
| 83 | ||
| 84 | /* Get the irq-routing property and apply the routing to the CPLD */ | |
| 85 | irq_routing = of_get_property(bcsr_node, "irq-routing", NULL); | |
| 86 | if (irq_routing == NULL) | |
| 87 | return; | |
| 88 | for (i = 0; i < 16; i++) { | |
| 89 | u8 irq = irq_routing[i]; | |
| 90 | out_8(bcsr_regs + BCSR_XIRQ_SELECT, i); | |
| 91 | out_8(bcsr_regs + BCSR_XIRQ_ROUTING, irq); | |
| 92 | } | |
| 93 | in_8(bcsr_regs + BCSR_XIRQ_SELECT); | |
| 94 | mb(); | |
| 95 | out_8(bcsr_regs + BCSR_GPIO_IRQ_PAR_CTRL, 0xfe); | |
| 96 | } | |
| 97 | ||
| 98 | static void __init ep405_setup_arch(void) | |
| 99 | { | |
| 100 | /* Find & init the BCSR CPLD */ | |
| 101 | ep405_init_bcsr(); | |
| 25c24f3d BH |
102 | |
| 103 | ppc_pci_flags = PPC_PCI_REASSIGN_ALL_RSRC; | |
| 61974038 BH |
104 | } |
| 105 | ||
| 106 | static int __init ep405_probe(void) | |
| 107 | { | |
| 108 | unsigned long root = of_get_flat_dt_root(); | |
| 109 | ||
| 110 | if (!of_flat_dt_is_compatible(root, "ep405")) | |
| 111 | return 0; | |
| 112 | ||
| 113 | return 1; | |
| 114 | } | |
| 115 | ||
| 116 | define_machine(ep405) { | |
| 117 | .name = "EP405", | |
| 118 | .probe = ep405_probe, | |
| 119 | .setup_arch = ep405_setup_arch, | |
| 120 | .progress = udbg_progress, | |
| 121 | .init_IRQ = uic_init_tree, | |
| 122 | .get_irq = uic_get_irq, | |
| 93173ce2 | 123 | .restart = ppc4xx_reset_system, |
| 61974038 BH |
124 | .calibrate_decr = generic_calibrate_decr, |
| 125 | }; |