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61 lines
1.6 KiB
C
61 lines
1.6 KiB
C
#include "usb.h"
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#include "xhci/xhci.h"
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#include <common/kprint.h>
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#include <driver/pci/pci.h>
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#include <debug/bug.h>
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#include <common/spinlock.h>
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extern spinlock_t xhci_controller_init_lock; // xhci控制器初始化锁
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#define MAX_USB_NUM 8 // pci总线上的usb设备的最大数量
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// 在pci总线上寻找到的usb设备控制器的header
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static struct pci_device_structure_header_t *usb_pdevs[MAX_USB_NUM];
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static int usb_pdevs_count = 0;
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/**
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* @brief 初始化usb驱动程序
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*
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*/
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void usb_init()
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{
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kinfo("Initializing usb driver...");
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spin_init(&xhci_controller_init_lock);
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// 获取所有usb-pci设备的列表
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pci_get_device_structure(USB_CLASS, USB_SUBCLASS, usb_pdevs, &usb_pdevs_count);
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if (WARN_ON(usb_pdevs_count == 0))
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{
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kwarn("There is no usb hardware in this computer!");
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return;
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}
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// 初始化每个usb控制器
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for (int i = 0; i < usb_pdevs_count; ++i)
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{
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io_mfence();
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switch (usb_pdevs[i]->ProgIF)
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{
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case USB_TYPE_UHCI:
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case USB_TYPE_OHCI:
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case USB_TYPE_EHCI:
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case USB_TYPE_UNSPEC:
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case USB_TYPE_DEVICE:
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kwarn("Unsupported usb host type: %#02x", usb_pdevs[i]->ProgIF);
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break;
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case USB_TYPE_XHCI:
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// 初始化对应的xhci控制器
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xhci_init((struct pci_device_structure_general_device_t *)usb_pdevs[i]);
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io_mfence();
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break;
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default:
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kerror("Error value of usb_pdevs[%d]->ProgIF: %#02x", i, usb_pdevs[i]->ProgIF);
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return;
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break;
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}
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}
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kinfo("Successfully initialized all usb host controllers!");
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} |