1 use self::{platform_device::PlatformBusDevice, subsys::PlatformBus}; 2 3 use super::{ 4 device::{ 5 bus::{bus_register, Bus, BusState}, 6 device_unregister, sys_devices_kset, DevicePrivateData, IdTable, 7 }, 8 kobject::KObject, 9 }; 10 use crate::driver::base::device::device_register; 11 use alloc::{collections::BTreeSet, string::ToString, sync::Arc, vec::Vec}; 12 use core::fmt::Debug; 13 use system_error::SystemError; 14 use unified_init::{define_unified_initializer_slice, unified_init}; 15 16 pub mod platform_device; 17 pub mod platform_driver; 18 pub mod subsys; 19 20 static mut PLATFORM_BUS_DEVICE: Option<Arc<PlatformBusDevice>> = None; 21 static mut PLATFORM_BUS: Option<Arc<PlatformBus>> = None; 22 23 define_unified_initializer_slice!(PLATFORM_DEVICE_INITIALIZER); 24 25 #[allow(dead_code)] 26 #[inline(always)] 27 pub fn platform_bus_device() -> Arc<PlatformBusDevice> { 28 unsafe { PLATFORM_BUS_DEVICE.clone().unwrap() } 29 } 30 31 #[allow(dead_code)] 32 #[inline(always)] 33 pub fn platform_bus() -> Arc<PlatformBus> { 34 unsafe { PLATFORM_BUS.clone().unwrap() } 35 } 36 37 /// @brief: platform总线匹配表 38 /// 总线上的设备和驱动都存在一份匹配表 39 /// 根据匹配表条目是否匹配来辨识设备和驱动能否进行匹配 40 #[derive(Debug, Clone)] 41 pub struct CompatibleTable(BTreeSet<&'static str>); 42 43 /// @brief: 匹配表操作方法集 44 impl CompatibleTable { 45 /// @brief: 创建一个新的匹配表 46 /// @parameter id_vec: 匹配条目数组 47 /// @return: 匹配表 48 #[inline] 49 #[allow(dead_code)] 50 pub fn new(id_vec: Vec<&'static str>) -> CompatibleTable { 51 CompatibleTable(BTreeSet::from_iter(id_vec.iter().cloned())) 52 } 53 54 /// @brief: 判断两个匹配表是否能够匹配 55 /// @parameter other: 其他匹配表 56 /// @return: 如果匹配成功，返回true，否则，返回false 57 #[allow(dead_code)] 58 pub fn matches(&self, other: &CompatibleTable) -> bool { 59 self.0.intersection(&other.0).next().is_some() 60 } 61 62 /// @brief: 添加一组匹配条目 63 /// @param: 64 #[allow(dead_code)] 65 pub fn add_device(&mut self, devices: Vec<&'static str>) { 66 for str in devices { 67 self.0.insert(str); 68 } 69 } 70 } 71 72 /// @brief: 初始化platform总线 73 /// @parameter: None 74 /// @return: None 75 /// 76 /// 参考： https://code.dragonos.org.cn/xref/linux-6.1.9/drivers/base/platform.c?fi=platform_bus_init#1511 77 pub fn platform_bus_init() -> Result<(), SystemError> { 78 let platform_device: Arc<PlatformBusDevice> = PlatformBusDevice::new( 79 DevicePrivateData::new( 80 IdTable::new("platform".to_string(), None), 81 BusState::NotInitialized.into(), 82 ), 83 Some(Arc::downgrade(&(sys_devices_kset() as Arc<dyn KObject>))), 84 ); 85 unsafe { PLATFORM_BUS_DEVICE = Some(platform_device.clone()) }; 86 // 注册到/sys/devices下 87 device_register(platform_device.clone())?; 88 89 let paltform_bus = PlatformBus::new(); 90 // 注册到/sys/bus下 91 let r = bus_register(paltform_bus.clone() as Arc<dyn Bus>); 92 if r.is_err() { 93 device_unregister(platform_device.clone()); 94 unsafe { PLATFORM_BUS_DEVICE = None }; 95 return r; 96 } 97 unsafe { PLATFORM_BUS = Some(paltform_bus) }; 98 99 unified_init!(PLATFORM_DEVICE_INITIALIZER); 100 101 return r; 102 } 103