projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| cc35b676 JX |
1 | /* |
| 2 | * Copyright 2008-2011, IBM Corporation | |
| 3 | * | |
| 4 | * This program is free software; you can redistribute it and/or | |
| 5 | * modify it under the terms of the GNU General Public License | |
| 6 | * as published by the Free Software Foundation; either version | |
| 7 | * 2 of the License, or (at your option) any later version. | |
| 8 | */ | |
| 9 | ||
| 10 | #include <linux/kernel.h> | |
| 11 | #include <linux/of.h> | |
| 12 | #include <linux/of_device.h> | |
| 13 | #include <linux/smp.h> | |
| 14 | #include <linux/delay.h> | |
| 15 | #include <linux/time.h> | |
| dc7a9bd3 | 16 | #include <linux/of_address.h> |
| cc35b676 JX |
17 | |
| 18 | #include <asm/scom.h> | |
| 19 | ||
| 20 | #include "wsp.h" | |
| 21 | #include "ics.h" | |
| 22 | ||
| 23 | #define WSP_SOC_COMPATIBLE "ibm,wsp-soc" | |
| 24 | #define PBIC_COMPATIBLE "ibm,wsp-pbic" | |
| 25 | #define COPRO_COMPATIBLE "ibm,wsp-coprocessor" | |
| 26 | ||
| 27 | static int __init wsp_probe_buses(void) | |
| 28 | { | |
| 29 | static __initdata struct of_device_id bus_ids[] = { | |
| 30 | /* | |
| 31 | * every node in between needs to be here or you won't | |
| 32 | * find it | |
| 33 | */ | |
| 34 | { .compatible = WSP_SOC_COMPATIBLE, }, | |
| 35 | { .compatible = PBIC_COMPATIBLE, }, | |
| 36 | { .compatible = COPRO_COMPATIBLE, }, | |
| 37 | {}, | |
| 38 | }; | |
| 39 | of_platform_bus_probe(NULL, bus_ids, NULL); | |
| 40 | ||
| 41 | return 0; | |
| 42 | } | |
| 43 | ||
| 44 | void __init wsp_setup_arch(void) | |
| 45 | { | |
| 46 | /* init to some ~sane value until calibrate_delay() runs */ | |
| 47 | loops_per_jiffy = 50000000; | |
| 48 | ||
| 49 | scom_init_wsp(); | |
| 50 | ||
| 51 | /* Setup SMP callback */ | |
| 52 | #ifdef CONFIG_SMP | |
| 53 | a2_setup_smp(); | |
| 54 | #endif | |
| 55 | #ifdef CONFIG_PCI | |
| 56 | wsp_setup_pci(); | |
| 57 | #endif | |
| 58 | } | |
| 59 | ||
| 60 | void __init wsp_setup_irq(void) | |
| 61 | { | |
| 62 | wsp_init_irq(); | |
| 63 | opb_pic_init(); | |
| 64 | } | |
| 65 | ||
| 66 | ||
| 67 | int __init wsp_probe_devices(void) | |
| 68 | { | |
| 69 | struct device_node *np; | |
| 70 | ||
| 71 | /* Our RTC is a ds1500. It seems to be programatically compatible | |
| 72 | * with the ds1511 for which we have a driver so let's use that | |
| 73 | */ | |
| 74 | np = of_find_compatible_node(NULL, NULL, "dallas,ds1500"); | |
| 75 | if (np != NULL) { | |
| 76 | struct resource res; | |
| 77 | if (of_address_to_resource(np, 0, &res) == 0) | |
| 78 | platform_device_register_simple("ds1511", 0, &res, 1); | |
| 79 | } | |
| 80 | ||
| 81 | wsp_probe_buses(); | |
| 82 | ||
| 83 | return 0; | |
| 84 | } | |
| 85 | ||
| 86 | void wsp_halt(void) | |
| 87 | { | |
| 88 | u64 val; | |
| 89 | scom_map_t m; | |
| 90 | struct device_node *dn; | |
| 91 | struct device_node *mine; | |
| 92 | struct device_node *me; | |
| aaa63093 | 93 | int rc; |
| cc35b676 JX |
94 | |
| 95 | me = of_get_cpu_node(smp_processor_id(), NULL); | |
| 96 | mine = scom_find_parent(me); | |
| 97 | ||
| 98 | /* This will halt all the A2s but not power off the chip */ | |
| 99 | for_each_node_with_property(dn, "scom-controller") { | |
| 100 | if (dn == mine) | |
| 101 | continue; | |
| 102 | m = scom_map(dn, 0, 1); | |
| 103 | ||
| 104 | /* read-modify-write it so the HW probe does not get | |
| 105 | * confused */ | |
| aaa63093 BH |
106 | rc = scom_read(m, 0, &val); |
| 107 | if (rc == 0) | |
| 108 | scom_write(m, 0, val | 1); | |
| cc35b676 JX |
109 | scom_unmap(m); |
| 110 | } | |
| 111 | m = scom_map(mine, 0, 1); | |
| aaa63093 BH |
112 | rc = scom_read(m, 0, &val); |
| 113 | if (rc == 0) | |
| 114 | scom_write(m, 0, val | 1); | |
| cc35b676 JX |
115 | /* should never return */ |
| 116 | scom_unmap(m); | |
| 117 | } |