73 lines
2.1 KiB
C
73 lines
2.1 KiB
C
#include <device/def_device_op.h>
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#include <device/device.h>
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#include <device/pci.h>
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#include <device/pci_info.h>
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#include <device/pci_xhci.h>
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#include <device/xhci.h>
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#include <libk/align.h>
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#include <libk/lengthof.h>
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#include <libk/printf.h>
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#include <libk/std.h>
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#include <limine/requests.h>
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#include <proc/proc.h>
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#include <proc/reschedule.h>
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#include <sys/debug.h>
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#include <sys/mm.h>
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static int xhci_counter = 0;
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bool pci_xhci_init (struct proc* proc, struct reschedule_ctx* rctx, struct pci_info pci_info) {
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struct limine_hhdm_response* hhdm = limine_hhdm_request.response;
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uint8_t progif = pci_read8 (pci_info.bus, pci_info.slot, pci_info.func, PCI_PROG_IF);
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/* not an XHCI controller */
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if (progif != 0x30) {
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return true;
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}
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uint16_t pci_cmd = pci_read16 (pci_info.bus, pci_info.slot, pci_info.func, PCI_COMMAND);
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uint16_t new_cmd = (pci_cmd | (1 << 1) | (1 << 2));
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if (pci_cmd != new_cmd) {
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pci_write16 (pci_info.bus, pci_info.slot, pci_info.func, PCI_COMMAND, new_cmd);
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}
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uintptr_t xhci_phys = 0;
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uint32_t bar0 = pci_read32 (pci_info.bus, pci_info.slot, pci_info.func, PCI_BAR0);
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if ((bar0 & PCI_BAR_MEM64)) {
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uint32_t bar1 = pci_read32 (pci_info.bus, pci_info.slot, pci_info.func, PCI_BAR1);
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xhci_phys = ((uint64_t)bar1 << 32) | (bar0 & ~0xF);
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DEBUG ("XHCI phys base addr=%p (64 bit)\n", xhci_phys);
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} else {
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xhci_phys = (bar0 & ~0xF);
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DEBUG ("XHCI phys base addr=%p (32 bit)\n", xhci_phys);
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}
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if (xhci_phys == 0) {
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DEBUG ("WARNING xhci_phys is NULL!\n");
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return false;
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}
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uintptr_t xhci_base = xhci_phys + (uintptr_t)hhdm->offset;
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/* 2 pages should cover the mmio space */
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mm_map_kernel_page (xhci_phys, xhci_base, MM_PG_RW | MM_PG_PRESENT);
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mm_map_kernel_page (xhci_phys + PAGE_SIZE, xhci_base + PAGE_SIZE, MM_PG_RW | MM_PG_PRESENT);
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char key[32];
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snprintf (key, sizeof (key), "xhci%d", xhci_counter++);
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struct xhci_init init = {.xhci_mmio_base = xhci_base};
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device_op_func_t ops[] = {0};
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struct device* xhci =
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device_create (key, ops, lengthof (ops), &xhci_init, &xhci_fini, &init, proc, rctx);
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return true;
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}
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