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-rw-r--r--sys/dev/usb/xhci.c463
1 files changed, 0 insertions, 463 deletions
diff --git a/sys/dev/usb/xhci.c b/sys/dev/usb/xhci.c
deleted file mode 100644
index f221843..0000000
--- a/sys/dev/usb/xhci.c
+++ /dev/null
@@ -1,463 +0,0 @@
-/*
- * Copyright (c) 2023-2024 Ian Marco Moffett and the Osmora Team.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are met:
- *
- * 1. Redistributions of source code must retain the above copyright notice,
- * this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. Neither the name of Hyra nor the names of its
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
- * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
- * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
- * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
- * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
- * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
- * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
- */
-
-#include <sys/driver.h>
-#include <dev/pci/pci.h>
-#include <sys/syslog.h>
-#include <sys/timer.h>
-#include <dev/usb/xhciregs.h>
-#include <dev/usb/xhcivar.h>
-#include <vm/physseg.h>
-#include <vm/dynalloc.h>
-#include <vm/vm.h>
-#include <string.h>
-#include <assert.h>
-
-__MODULE_NAME("xhci");
-__KERNEL_META("$Hyra$: xhci.c, Ian Marco Moffett, "
- "xHCI driver");
-
-#define pr_trace(fmt, ...) kprintf("xhci: " fmt, ##__VA_ARGS__)
-#define pr_error(...) pr_trace(__VA_ARGS__)
-
-static struct pci_device *hci_dev;
-static struct timer driver_tmr;
-
-static inline uint32_t *
-xhci_get_portsc(struct xhci_hc *hc, uint8_t portno)
-{
- if (portno > hc->maxports) {
- portno = hc->maxports;
- }
- return XHCI_BASE_OFF(hc->opregs, 0x400 + (0x10 * (portno - 1)));
-}
-
-/*
- * Set event ring segment table base
- * address.
- *
- * @hc: Host controler descriptor.
- * @pa: Physical address.
- */
-static inline void
-xhci_set_erst_base(struct xhci_hc *hc, uintptr_t pa)
-{
- struct xhci_caps *caps = XHCI_CAPS(hc->base);
- void *runtime_base = XHCI_RTS(hc->base, caps->rtsoff);
- uintptr_t *erstba;
-
- /*
- * The spec states that the Event Ring Segment Table
- * Base Address register is at 'runtime_base + 0x30 +
- * (32 * interrupter)'. See the xHCI spec, section 5.5.2.3.2
- */
- erstba = XHCI_BASE_OFF(runtime_base, 0x30);
- *erstba = pa;
-}
-
-/*
- * Submit a command by pushing a TRB to the
- * command ring.
- *
- * @hc: Host controller descriptor.
- * @trb: Transfer Request Block of command.
- */
-static int
-xhci_submit_cmd(struct xhci_hc *hc, struct xhci_trb trb)
-{
- volatile uint32_t *cmd_db;
- struct xhci_caps *caps = XHCI_CAPS(hc->base);
-
- /* Push the TRB to the command ring */
- hc->cmd_ring[hc->cmd_ptr++] = trb.dword0;
- hc->cmd_ring[hc->cmd_ptr++] = trb.dword1;
- hc->cmd_ring[hc->cmd_ptr++] = trb.dword2;
- hc->cmd_ring[hc->cmd_ptr++] = trb.dword3 | hc->cycle;
- hc->cmd_count++;
-
- /* Ring the command doorbell */
- cmd_db = XHCI_CMD_DB(hc->base, caps->dboff);
- *cmd_db = 0;
-
- if (hc->cmd_count >= XHCI_CMDRING_LEN - 1) {
- /*
- * Create raw link TRB and ring the doorbell. We want the
- * xHC to flip its cycle bit so it doesn't confuse existing
- * entries (that we'll overwrite) in the ring with current
- * entries, so we set the Toggle Cycle bit.
- *
- * See the xHCI spec, section 6.4.4.1 for information regarding
- * the format of link TRBs.
- */
- hc->cmd_ring[hc->cmd_ptr++] = VIRT_TO_PHYS(hc->cmd_ring) & 0xFFFFFFFF;
- hc->cmd_ring[hc->cmd_ptr++] = VIRT_TO_PHYS(hc->cmd_ring) >> 32;
- hc->cmd_ring[hc->cmd_ptr++] = 0;
- hc->cmd_ring[hc->cmd_ptr++] = hc->cycle | (XHCI_LINK << 10) | __BIT(1);
- *cmd_db = 0;
-
- /* Reset command state and flip cycle */
- hc->cmd_ptr = 0;
- hc->cmd_count = 0;
- hc->cycle = ~hc->cycle;
- }
-
- return 0;
-}
-
-/*
- * Parse xHCI extended caps
- */
-static int
-xhci_parse_ecp(struct xhci_hc *hc)
-{
- struct xhci_caps *caps = XHCI_CAPS(hc->base);
- struct xhci_proto *proto;
- uint32_t *p, val, dword2;
- uint32_t cap_ptr = XHCI_ECP(caps->hccparams1);
-
- p = XHCI_BASE_OFF(hc->base, cap_ptr*4);
- while (cap_ptr != 0) {
- val = *p;
- dword2 = *((uint32_t *)XHCI_BASE_OFF(p, 8));
-
- /* Get the next cap */
- p = XHCI_BASE_OFF(p, XHCI_PROTO_NEXT(val) * 4);
- cap_ptr = XHCI_PROTO_NEXT(val);
-
- if (XHCI_PROTO_ID(val) != XHCI_ECAP_PROTO) {
- /* Not a Supported Protocol Capability */
- continue;
- }
-
- if (hc->protocnt > XHCI_MAX_PROTOS) {
- /* Too many protocols */
- break;
- }
-
- proto = &hc->protos[hc->protocnt++];
- proto->major = XHCI_PROTO_MAJOR(val);
- proto->port_count = XHCI_PROTO_PORTCNT(dword2);
- proto->port_start = XHCI_PROTO_PORTOFF(dword2);
- }
-
- return 0;
-}
-
-/*
- * Set of xHCI scratchpad buffers.
- */
-static int
-xhci_init_scratchpads(struct xhci_hc *hc)
-{
- struct xhci_caps *caps = XHCI_CAPS(hc->base);
- uint16_t max_bufs_lo, max_bufs_hi, max_bufs;
- uintptr_t *buffer_array, tmp;
-
- max_bufs_lo = XHCI_MAX_SP_LO(caps->hcsparams2);
- max_bufs_hi = XHCI_MAX_SP_HI(caps->hcsparams2);
- max_bufs = (max_bufs_hi << 5) | max_bufs_lo;
- if (max_bufs == 0) {
- /*
- * Some emulators like QEMU don't need any
- * scratchpad buffers so we can just return
- * early.
- */
- return 0;
- }
-
- pr_trace("Need %d scratchpad buffers\n", max_bufs);
-
- /* Allocate buffer array */
- buffer_array = dynalloc_memalign(sizeof(uintptr_t)*max_bufs, 0x1000);
- if (buffer_array == NULL) {
- pr_error("Failed to allocate scratchpad buffer array\n");
- return -1;
- }
-
- memset(buffer_array, 0, sizeof(uintptr_t)*max_bufs);
-
- /* Fill the buffer array */
- for (size_t i = 0; i < max_bufs; ++i) {
- tmp = vm_alloc_pageframe(1);
-
- if (tmp == 0) {
- /* TODO: Shutdown, free memory */
- pr_error("Failed to fill scratchpad buffer array\n");
- return -1;
- }
-
- buffer_array[i] = tmp;
- }
-
- hc->dcbaap[0] = VIRT_TO_PHYS(buffer_array);
- return 0;
-}
-
-/*
- * Init USB ports on the root hub.
- */
-static int
-xhci_init_ports(struct xhci_hc *hc)
-{
- struct xhci_caps *caps = XHCI_CAPS(hc->base);
- size_t maxports = XHCI_MAXPORTS(caps->hcsparams1);
- uint32_t *portsc;
-
- for (size_t i = 1; i < maxports; ++i) {
- portsc = xhci_get_portsc(hc, i);
- if (__TEST(*portsc, XHCI_PORTSC_CCS)) {
- pr_trace("Device connected on port %d, resetting...\n", i);
- *portsc |= XHCI_PORTSC_PR;
- }
- }
-
- return 0;
-}
-
-/*
- * Poll USBSTS.HCH to be val
- *
- * Returns 0 on success. Non-zero values returned
- * indicate a hang.
- */
-static int
-xhci_poll_hch(struct xhci_hc *hc, uint8_t val)
-{
- struct xhci_opregs *opregs = hc->opregs;
- size_t time_waiting = 0;
-
- while ((opregs->usbsts & USBSTS_HCH) != val) {
- if (time_waiting >= XHCI_TIMEOUT) {
- /* Hang */
- return -1;
- }
-
- time_waiting += 50;
- driver_tmr.msleep(50);
- }
-
- return 0;
-}
-
-/*
- * Start up the host controller by setting
- * the USBCMD run/stop bit.
- */
-static int
-xhci_start_hc(struct xhci_hc *hc)
-{
- struct xhci_opregs *opregs = hc->opregs;
- int status;
-
- opregs->usbcmd |= USBCMD_RUN;
-
- if ((status = xhci_poll_hch(hc, 0)) != 0) {
- return status;
- }
-
- return 0;
-}
-
-static int
-xhci_reset_hc(struct xhci_hc *hc)
-{
- struct xhci_opregs *opregs = hc->opregs;
- size_t time_waiting = 0; /* In ms */
-
- pr_trace("Resetting host controller...\n");
-
- /*
- * Set USBCMD.HCRST to reset the controller and
- * wait for it to become zero.
- */
- opregs->usbcmd |= USBCMD_HCRST;
- while (1) {
- if (!__TEST(opregs->usbcmd, USBCMD_HCRST)) {
- /* Reset is complete */
- break;
- }
- if (time_waiting >= XHCI_TIMEOUT) {
- pr_error("Hang while polling USBCMD.HCRST to be zero\n");
- return -1;
- }
- driver_tmr.msleep(50);
- time_waiting += 50;
- }
- return 0;
-}
-
-/*
- * Allocate the Device Context Base Address
- * Array.
- *
- * Returns the physical address and sets
- * hc->dcbaap to the virtual address.
- */
-static uintptr_t
-xhci_alloc_dcbaa(struct xhci_hc *hc)
-{
- size_t dcbaa_size;
-
- dcbaa_size = sizeof(uintptr_t) * hc->maxslots;
- hc->dcbaap = dynalloc_memalign(dcbaa_size, 0x1000);
- __assert(hc->dcbaap != NULL);
-
- return VIRT_TO_PHYS(hc->dcbaap);
-}
-
-/*
- * Allocates command ring and sets hc->cmd_ring
- * to the virtual address.
- *
- * Returns the physical address.
- */
-static uintptr_t
-xhci_alloc_cmdring(struct xhci_hc *hc)
-{
- size_t cmdring_size;
-
- cmdring_size = XHCI_TRB_SIZE * XHCI_CMDRING_LEN;
- hc->cmd_ring = dynalloc_memalign(cmdring_size, 0x1000);
- __assert(hc->cmd_ring != NULL);
-
- return VIRT_TO_PHYS(hc->cmd_ring);
-}
-
-/*
- * Sets up the event ring.
- */
-static void
-xhci_init_evring(struct xhci_hc *hc)
-{
- struct xhci_caps *caps = XHCI_CAPS(hc->base);
- struct xhci_evring_segment *seg;
- uint64_t *erdp, *erstba;
- uint32_t *erst_size;
- void *runtime = XHCI_RTS(hc->base, caps->rtsoff);
- size_t size;
-
- size = XHCI_EVRING_LEN * XHCI_TRB_SIZE;
- seg = dynalloc_memalign(size, 64);
- memset(seg, 0, size);
-
- /* Set the size of the event ring segment table */
- erst_size = XHCI_BASE_OFF(runtime, 0x28);
- *erst_size = 1;
-
- /* Setup the event ring segment */
- memset(seg, 0, size);
- seg->base = VIRT_TO_PHYS(seg);
- seg->size = XHCI_EVRING_LEN;
-
- /* Setup the event ring dequeue pointer */
- erdp = XHCI_BASE_OFF(runtime, 0x38);
- *erdp = seg->base;
-
- /* Point ERSTBA to our event ring segment */
- erstba = XHCI_BASE_OFF(runtime, 0x30);
- *erstba = VIRT_TO_PHYS(seg);
-
- hc->event_ring = PHYS_TO_VIRT(seg->base);
-}
-
-static int
-xhci_init_hc(struct xhci_hc *hc)
-{
- struct xhci_caps *caps;
- struct xhci_opregs *opregs;
-
- /* Get some information from the controller */
- caps = XHCI_CAPS(hc->base);
- hc->caplen = caps->caplength;
- hc->maxslots = XHCI_MAXSLOTS(caps->hcsparams1);
- hc->maxports = XHCI_MAXSLOTS(caps->hcsparams1);
-
- opregs->config |= hc->maxslots;
-
- /* Fetch the opregs */
- opregs = XHCI_OPBASE(hc->base, hc->caplen);
- hc->opregs = XHCI_OPBASE(hc->base, hc->caplen);
-
- if (xhci_reset_hc(hc) != 0) {
- return -1;
- }
-
- /* Set cmdring state */
- hc->cycle = 1;
- hc->cmd_ptr = 0;
- hc->cmd_count = 0;
-
- /* Allocate resources and tell the HC about them */
- opregs->dcbaa_ptr = xhci_alloc_dcbaa(hc);
- xhci_init_scratchpads(hc);
- xhci_init_evring(hc);
- opregs->cmd_ring = xhci_alloc_cmdring(hc);
-
- /* We're ready, start up the HC and ports */
- xhci_start_hc(hc);
- xhci_parse_ecp(hc);
- xhci_init_ports(hc);
- return 0;
-}
-
-static int
-xhci_init(void)
-{
- uintptr_t bar0, bar1, base;
- struct xhci_hc hc;
- struct pci_lookup hc_lookup = {
- .pci_class = 0x0C,
- .pci_subclass = 0x03
- };
-
- /* Find the host controller on the bus */
- hci_dev = pci_get_device(hc_lookup, PCI_CLASS | PCI_SUBCLASS);
- if (hci_dev == NULL) {
- return -1;
- }
-
- bar0 = hci_dev->bar[0] & ~7;
- bar1 = hci_dev->bar[1] & ~7;
- base = __COMBINE32(bar1, bar0);
- hc.base = PHYS_TO_VIRT(base);
- pr_trace("xHCI HC base @ 0x%p\n", base);
-
- if (req_timer(TIMER_GP, &driver_tmr) != 0) {
- pr_error("Failed to fetch general purpose timer\n");
- return -1;
- }
- if (driver_tmr.msleep == NULL) {
- pr_error("Timer does not have msleep()\n");
- return -1;
- }
-
- return xhci_init_hc(&hc);
-}
-
-DRIVER_EXPORT(xhci_init);
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