--- /dev/null
+/*
+ * USB HOST XHCI Controller stack
+ *
+ * Based on xHCI host controller driver in linux-kernel
+ * by Sarah Sharp.
+ *
+ * Copyright (C) 2008 Intel Corp.
+ * Author: Sarah Sharp
+ *
+ * Copyright (C) 2013 Samsung Electronics Co.Ltd
+ * Authors: Vivek Gautam <gautam.vivek@samsung.com>
+ * Vikas Sajjan <vikas.sajjan@samsung.com>
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <common.h>
+#include <asm/byteorder.h>
+#include <usb.h>
+#include <malloc.h>
+#include <asm/cache.h>
+#include <asm-generic/errno.h>
+
+#include "xhci.h"
+
+#define CACHELINE_SIZE CONFIG_SYS_CACHELINE_SIZE
+/**
+ * flushes the address passed till the length
+ *
+ * @param addr pointer to memory region to be flushed
+ * @param len the length of the cache line to be flushed
+ * @return none
+ */
+void xhci_flush_cache(uint32_t addr, u32 len)
+{
+ BUG_ON((void *)addr == NULL || len == 0);
+
+ flush_dcache_range(addr & ~(CACHELINE_SIZE - 1),
+ ALIGN(addr + len, CACHELINE_SIZE));
+}
+
+/**
+ * invalidates the address passed till the length
+ *
+ * @param addr pointer to memory region to be invalidates
+ * @param len the length of the cache line to be invalidated
+ * @return none
+ */
+void xhci_inval_cache(uint32_t addr, u32 len)
+{
+ BUG_ON((void *)addr == NULL || len == 0);
+
+ invalidate_dcache_range(addr & ~(CACHELINE_SIZE - 1),
+ ALIGN(addr + len, CACHELINE_SIZE));
+}
+
+
+/**
+ * frees the "segment" pointer passed
+ *
+ * @param ptr pointer to "segement" to be freed
+ * @return none
+ */
+static void xhci_segment_free(struct xhci_segment *seg)
+{
+ free(seg->trbs);
+ seg->trbs = NULL;
+
+ free(seg);
+}
+
+/**
+ * frees the "ring" pointer passed
+ *
+ * @param ptr pointer to "ring" to be freed
+ * @return none
+ */
+static void xhci_ring_free(struct xhci_ring *ring)
+{
+ struct xhci_segment *seg;
+ struct xhci_segment *first_seg;
+
+ BUG_ON(!ring);
+
+ first_seg = ring->first_seg;
+ seg = first_seg->next;
+ while (seg != first_seg) {
+ struct xhci_segment *next = seg->next;
+ xhci_segment_free(seg);
+ seg = next;
+ }
+ xhci_segment_free(first_seg);
+
+ free(ring);
+}
+
+/**
+ * frees the "xhci_container_ctx" pointer passed
+ *
+ * @param ptr pointer to "xhci_container_ctx" to be freed
+ * @return none
+ */
+static void xhci_free_container_ctx(struct xhci_container_ctx *ctx)
+{
+ free(ctx->bytes);
+ free(ctx);
+}
+
+/**
+ * frees the virtual devices for "xhci_ctrl" pointer passed
+ *
+ * @param ptr pointer to "xhci_ctrl" whose virtual devices are to be freed
+ * @return none
+ */
+static void xhci_free_virt_devices(struct xhci_ctrl *ctrl)
+{
+ int i;
+ int slot_id;
+ struct xhci_virt_device *virt_dev;
+
+ /*
+ * refactored here to loop through all virt_dev
+ * Slot ID 0 is reserved
+ */
+ for (slot_id = 0; slot_id < MAX_HC_SLOTS; slot_id++) {
+ virt_dev = ctrl->devs[slot_id];
+ if (!virt_dev)
+ continue;
+
+ ctrl->dcbaa->dev_context_ptrs[slot_id] = 0;
+
+ for (i = 0; i < 31; ++i)
+ if (virt_dev->eps[i].ring)
+ xhci_ring_free(virt_dev->eps[i].ring);
+
+ if (virt_dev->in_ctx)
+ xhci_free_container_ctx(virt_dev->in_ctx);
+ if (virt_dev->out_ctx)
+ xhci_free_container_ctx(virt_dev->out_ctx);
+
+ free(virt_dev);
+ /* make sure we are pointing to NULL */
+ ctrl->devs[slot_id] = NULL;
+ }
+}
+
+/**
+ * frees all the memory allocated
+ *
+ * @param ptr pointer to "xhci_ctrl" to be cleaned up
+ * @return none
+ */
+void xhci_cleanup(struct xhci_ctrl *ctrl)
+{
+ xhci_ring_free(ctrl->event_ring);
+ xhci_ring_free(ctrl->cmd_ring);
+ xhci_free_virt_devices(ctrl);
+ free(ctrl->erst.entries);
+ free(ctrl->dcbaa);
+ memset(ctrl, '\0', sizeof(struct xhci_ctrl));
+}
+
+/**
+ * Malloc the aligned memory
+ *
+ * @param size size of memory to be allocated
+ * @return allocates the memory and returns the aligned pointer
+ */
+static void *xhci_malloc(unsigned int size)
+{
+ void *ptr;
+ size_t cacheline_size = max(XHCI_ALIGNMENT, CACHELINE_SIZE);
+
+ ptr = memalign(cacheline_size, ALIGN(size, cacheline_size));
+ BUG_ON(!ptr);
+ memset(ptr, '\0', size);
+
+ xhci_flush_cache((uint32_t)ptr, size);
+
+ return ptr;
+}
+
+/**
+ * Make the prev segment point to the next segment.
+ * Change the last TRB in the prev segment to be a Link TRB which points to the
+ * address of the next segment. The caller needs to set any Link TRB
+ * related flags, such as End TRB, Toggle Cycle, and no snoop.
+ *
+ * @param prev pointer to the previous segment
+ * @param next pointer to the next segment
+ * @param link_trbs flag to indicate whether to link the trbs or NOT
+ * @return none
+ */
+static void xhci_link_segments(struct xhci_segment *prev,
+ struct xhci_segment *next, bool link_trbs)
+{
+ u32 val;
+ u64 val_64 = 0;
+
+ if (!prev || !next)
+ return;
+ prev->next = next;
+ if (link_trbs) {
+ val_64 = (uintptr_t)next->trbs;
+ prev->trbs[TRBS_PER_SEGMENT-1].link.segment_ptr = val_64;
+
+ /*
+ * Set the last TRB in the segment to
+ * have a TRB type ID of Link TRB
+ */
+ val = le32_to_cpu(prev->trbs[TRBS_PER_SEGMENT-1].link.control);
+ val &= ~TRB_TYPE_BITMASK;
+ val |= (TRB_LINK << TRB_TYPE_SHIFT);
+
+ prev->trbs[TRBS_PER_SEGMENT-1].link.control = cpu_to_le32(val);
+ }
+}
+
+/**
+ * Initialises the Ring's enqueue,dequeue,enq_seg pointers
+ *
+ * @param ring pointer to the RING to be intialised
+ * @return none
+ */
+static void xhci_initialize_ring_info(struct xhci_ring *ring)
+{
+ /*
+ * The ring is empty, so the enqueue pointer == dequeue pointer
+ */
+ ring->enqueue = ring->first_seg->trbs;
+ ring->enq_seg = ring->first_seg;
+ ring->dequeue = ring->enqueue;
+ ring->deq_seg = ring->first_seg;
+
+ /*
+ * The ring is initialized to 0. The producer must write 1 to the
+ * cycle bit to handover ownership of the TRB, so PCS = 1.
+ * The consumer must compare CCS to the cycle bit to
+ * check ownership, so CCS = 1.
+ */
+ ring->cycle_state = 1;
+}
+
+/**
+ * Allocates a generic ring segment from the ring pool, sets the dma address,
+ * initializes the segment to zero, and sets the private next pointer to NULL.
+ * Section 4.11.1.1:
+ * "All components of all Command and Transfer TRBs shall be initialized to '0'"
+ *
+ * @param none
+ * @return pointer to the newly allocated SEGMENT
+ */
+static struct xhci_segment *xhci_segment_alloc(void)
+{
+ struct xhci_segment *seg;
+
+ seg = (struct xhci_segment *)malloc(sizeof(struct xhci_segment));
+ BUG_ON(!seg);
+
+ seg->trbs = (union xhci_trb *)xhci_malloc(SEGMENT_SIZE);
+
+ seg->next = NULL;
+
+ return seg;
+}
+
+/**
+ * Create a new ring with zero or more segments.
+ * TODO: current code only uses one-time-allocated single-segment rings
+ * of 1KB anyway, so we might as well get rid of all the segment and
+ * linking code (and maybe increase the size a bit, e.g. 4KB).
+ *
+ *
+ * Link each segment together into a ring.
+ * Set the end flag and the cycle toggle bit on the last segment.
+ * See section 4.9.2 and figures 15 and 16 of XHCI spec rev1.0.
+ *
+ * @param num_segs number of segments in the ring
+ * @param link_trbs flag to indicate whether to link the trbs or NOT
+ * @return pointer to the newly created RING
+ */
+struct xhci_ring *xhci_ring_alloc(unsigned int num_segs, bool link_trbs)
+{
+ struct xhci_ring *ring;
+ struct xhci_segment *prev;
+
+ ring = (struct xhci_ring *)malloc(sizeof(struct xhci_ring));
+ BUG_ON(!ring);
+
+ if (num_segs == 0)
+ return ring;
+
+ ring->first_seg = xhci_segment_alloc();
+ BUG_ON(!ring->first_seg);
+
+ num_segs--;
+
+ prev = ring->first_seg;
+ while (num_segs > 0) {
+ struct xhci_segment *next;
+
+ next = xhci_segment_alloc();
+ BUG_ON(!next);
+
+ xhci_link_segments(prev, next, link_trbs);
+
+ prev = next;
+ num_segs--;
+ }
+ xhci_link_segments(prev, ring->first_seg, link_trbs);
+ if (link_trbs) {
+ /* See section 4.9.2.1 and 6.4.4.1 */
+ prev->trbs[TRBS_PER_SEGMENT-1].link.control |=
+ cpu_to_le32(LINK_TOGGLE);
+ }
+ xhci_initialize_ring_info(ring);
+
+ return ring;
+}
+
+/**
+ * Allocates the Container context
+ *
+ * @param ctrl Host controller data structure
+ * @param type type of XHCI Container Context
+ * @return NULL if failed else pointer to the context on success
+ */
+static struct xhci_container_ctx
+ *xhci_alloc_container_ctx(struct xhci_ctrl *ctrl, int type)
+{
+ struct xhci_container_ctx *ctx;
+
+ ctx = (struct xhci_container_ctx *)
+ malloc(sizeof(struct xhci_container_ctx));
+ BUG_ON(!ctx);
+
+ BUG_ON((type != XHCI_CTX_TYPE_DEVICE) && (type != XHCI_CTX_TYPE_INPUT));
+ ctx->type = type;
+ ctx->size = (MAX_EP_CTX_NUM + 1) *
+ CTX_SIZE(readl(&ctrl->hccr->cr_hccparams));
+ if (type == XHCI_CTX_TYPE_INPUT)
+ ctx->size += CTX_SIZE(readl(&ctrl->hccr->cr_hccparams));
+
+ ctx->bytes = (u8 *)xhci_malloc(ctx->size);
+
+ return ctx;
+}
+
+/**
+ * Allocating virtual device
+ *
+ * @param udev pointer to USB deivce structure
+ * @return 0 on success else -1 on failure
+ */
+int xhci_alloc_virt_device(struct usb_device *udev)
+{
+ u64 byte_64 = 0;
+ unsigned int slot_id = udev->slot_id;
+ struct xhci_virt_device *virt_dev;
+ struct xhci_ctrl *ctrl = udev->controller;
+
+ /* Slot ID 0 is reserved */
+ if (ctrl->devs[slot_id]) {
+ printf("Virt dev for slot[%d] already allocated\n", slot_id);
+ return -EEXIST;
+ }
+
+ ctrl->devs[slot_id] = (struct xhci_virt_device *)
+ malloc(sizeof(struct xhci_virt_device));
+
+ if (!ctrl->devs[slot_id]) {
+ puts("Failed to allocate virtual device\n");
+ return -ENOMEM;
+ }
+
+ memset(ctrl->devs[slot_id], 0, sizeof(struct xhci_virt_device));
+ virt_dev = ctrl->devs[slot_id];
+
+ /* Allocate the (output) device context that will be used in the HC. */
+ virt_dev->out_ctx = xhci_alloc_container_ctx(ctrl,
+ XHCI_CTX_TYPE_DEVICE);
+ if (!virt_dev->out_ctx) {
+ puts("Failed to allocate out context for virt dev\n");
+ return -ENOMEM;
+ }
+
+ /* Allocate the (input) device context for address device command */
+ virt_dev->in_ctx = xhci_alloc_container_ctx(ctrl,
+ XHCI_CTX_TYPE_INPUT);
+ if (!virt_dev->in_ctx) {
+ puts("Failed to allocate in context for virt dev\n");
+ return -ENOMEM;
+ }
+
+ /* Allocate endpoint 0 ring */
+ virt_dev->eps[0].ring = xhci_ring_alloc(1, true);
+
+ byte_64 = (uintptr_t)(virt_dev->out_ctx->bytes);
+
+ /* Point to output device context in dcbaa. */
+ ctrl->dcbaa->dev_context_ptrs[slot_id] = byte_64;
+
+ xhci_flush_cache((uint32_t)&ctrl->dcbaa->dev_context_ptrs[slot_id],
+ sizeof(__le64));
+ return 0;
+}
+
+/**
+ * Allocates the necessary data structures
+ * for XHCI host controller
+ *
+ * @param ctrl Host controller data structure
+ * @param hccr pointer to HOST Controller Control Registers
+ * @param hcor pointer to HOST Controller Operational Registers
+ * @return 0 if successful else -1 on failure
+ */
+int xhci_mem_init(struct xhci_ctrl *ctrl, struct xhci_hccr *hccr,
+ struct xhci_hcor *hcor)
+{
+ uint64_t val_64;
+ uint64_t trb_64;
+ uint32_t val;
+ unsigned long deq;
+ int i;
+ struct xhci_segment *seg;
+
+ /* DCBAA initialization */
+ ctrl->dcbaa = (struct xhci_device_context_array *)
+ xhci_malloc(sizeof(struct xhci_device_context_array));
+ if (ctrl->dcbaa == NULL) {
+ puts("unable to allocate DCBA\n");
+ return -ENOMEM;
+ }
+
+ val_64 = (uintptr_t)ctrl->dcbaa;
+ /* Set the pointer in DCBAA register */
+ xhci_writeq(&hcor->or_dcbaap, val_64);
+
+ /* Command ring control pointer register initialization */
+ ctrl->cmd_ring = xhci_ring_alloc(1, true);
+
+ /* Set the address in the Command Ring Control register */
+ trb_64 = (uintptr_t)ctrl->cmd_ring->first_seg->trbs;
+ val_64 = xhci_readq(&hcor->or_crcr);
+ val_64 = (val_64 & (u64) CMD_RING_RSVD_BITS) |
+ (trb_64 & (u64) ~CMD_RING_RSVD_BITS) |
+ ctrl->cmd_ring->cycle_state;
+ xhci_writeq(&hcor->or_crcr, val_64);
+
+ /* write the address of db register */
+ val = xhci_readl(&hccr->cr_dboff);
+ val &= DBOFF_MASK;
+ ctrl->dba = (struct xhci_doorbell_array *)((char *)hccr + val);
+
+ /* write the address of runtime register */
+ val = xhci_readl(&hccr->cr_rtsoff);
+ val &= RTSOFF_MASK;
+ ctrl->run_regs = (struct xhci_run_regs *)((char *)hccr + val);
+
+ /* writting the address of ir_set structure */
+ ctrl->ir_set = &ctrl->run_regs->ir_set[0];
+
+ /* Event ring does not maintain link TRB */
+ ctrl->event_ring = xhci_ring_alloc(ERST_NUM_SEGS, false);
+ ctrl->erst.entries = (struct xhci_erst_entry *)
+ xhci_malloc(sizeof(struct xhci_erst_entry) * ERST_NUM_SEGS);
+
+ ctrl->erst.num_entries = ERST_NUM_SEGS;
+
+ for (val = 0, seg = ctrl->event_ring->first_seg;
+ val < ERST_NUM_SEGS;
+ val++) {
+ trb_64 = 0;
+ trb_64 = (uintptr_t)seg->trbs;
+ struct xhci_erst_entry *entry = &ctrl->erst.entries[val];
+ xhci_writeq(&entry->seg_addr, trb_64);
+ entry->seg_size = cpu_to_le32(TRBS_PER_SEGMENT);
+ entry->rsvd = 0;
+ seg = seg->next;
+ }
+ xhci_flush_cache((uint32_t)ctrl->erst.entries,
+ ERST_NUM_SEGS * sizeof(struct xhci_erst_entry));
+
+ deq = (unsigned long)ctrl->event_ring->dequeue;
+
+ /* Update HC event ring dequeue pointer */
+ xhci_writeq(&ctrl->ir_set->erst_dequeue,
+ (u64)deq & (u64)~ERST_PTR_MASK);
+
+ /* set ERST count with the number of entries in the segment table */
+ val = xhci_readl(&ctrl->ir_set->erst_size);
+ val &= ERST_SIZE_MASK;
+ val |= ERST_NUM_SEGS;
+ xhci_writel(&ctrl->ir_set->erst_size, val);
+
+ /* this is the event ring segment table pointer */
+ val_64 = xhci_readq(&ctrl->ir_set->erst_base);
+ val_64 &= ERST_PTR_MASK;
+ val_64 |= ((u32)(ctrl->erst.entries) & ~ERST_PTR_MASK);
+
+ xhci_writeq(&ctrl->ir_set->erst_base, val_64);
+
+ /* initializing the virtual devices to NULL */
+ for (i = 0; i < MAX_HC_SLOTS; ++i)
+ ctrl->devs[i] = NULL;
+
+ /*
+ * Just Zero'ing this register completely,
+ * or some spurious Device Notification Events
+ * might screw things here.
+ */
+ xhci_writel(&hcor->or_dnctrl, 0x0);
+
+ return 0;
+}
+
+/**
+ * Give the input control context for the passed container context
+ *
+ * @param ctx pointer to the context
+ * @return pointer to the Input control context data
+ */
+struct xhci_input_control_ctx
+ *xhci_get_input_control_ctx(struct xhci_container_ctx *ctx)
+{
+ BUG_ON(ctx->type != XHCI_CTX_TYPE_INPUT);
+ return (struct xhci_input_control_ctx *)ctx->bytes;
+}
+
+/**
+ * Give the slot context for the passed container context
+ *
+ * @param ctrl Host controller data structure
+ * @param ctx pointer to the context
+ * @return pointer to the slot control context data
+ */
+struct xhci_slot_ctx *xhci_get_slot_ctx(struct xhci_ctrl *ctrl,
+ struct xhci_container_ctx *ctx)
+{
+ if (ctx->type == XHCI_CTX_TYPE_DEVICE)
+ return (struct xhci_slot_ctx *)ctx->bytes;
+
+ return (struct xhci_slot_ctx *)
+ (ctx->bytes + CTX_SIZE(readl(&ctrl->hccr->cr_hccparams)));
+}
+
+/**
+ * Gets the EP context from based on the ep_index
+ *
+ * @param ctrl Host controller data structure
+ * @param ctx context container
+ * @param ep_index index of the endpoint
+ * @return pointer to the End point context
+ */
+struct xhci_ep_ctx *xhci_get_ep_ctx(struct xhci_ctrl *ctrl,
+ struct xhci_container_ctx *ctx,
+ unsigned int ep_index)
+{
+ /* increment ep index by offset of start of ep ctx array */
+ ep_index++;
+ if (ctx->type == XHCI_CTX_TYPE_INPUT)
+ ep_index++;
+
+ return (struct xhci_ep_ctx *)
+ (ctx->bytes +
+ (ep_index * CTX_SIZE(readl(&ctrl->hccr->cr_hccparams))));
+}
+
+/**
+ * Copy output xhci_ep_ctx to the input xhci_ep_ctx copy.
+ * Useful when you want to change one particular aspect of the endpoint
+ * and then issue a configure endpoint command.
+ *
+ * @param ctrl Host controller data structure
+ * @param in_ctx contains the input context
+ * @param out_ctx contains the input context
+ * @param ep_index index of the end point
+ * @return none
+ */
+void xhci_endpoint_copy(struct xhci_ctrl *ctrl,
+ struct xhci_container_ctx *in_ctx,
+ struct xhci_container_ctx *out_ctx,
+ unsigned int ep_index)
+{
+ struct xhci_ep_ctx *out_ep_ctx;
+ struct xhci_ep_ctx *in_ep_ctx;
+
+ out_ep_ctx = xhci_get_ep_ctx(ctrl, out_ctx, ep_index);
+ in_ep_ctx = xhci_get_ep_ctx(ctrl, in_ctx, ep_index);
+
+ in_ep_ctx->ep_info = out_ep_ctx->ep_info;
+ in_ep_ctx->ep_info2 = out_ep_ctx->ep_info2;
+ in_ep_ctx->deq = out_ep_ctx->deq;
+ in_ep_ctx->tx_info = out_ep_ctx->tx_info;
+}
+
+/**
+ * Copy output xhci_slot_ctx to the input xhci_slot_ctx.
+ * Useful when you want to change one particular aspect of the endpoint
+ * and then issue a configure endpoint command.
+ * Only the context entries field matters, but
+ * we'll copy the whole thing anyway.
+ *
+ * @param ctrl Host controller data structure
+ * @param in_ctx contains the inpout context
+ * @param out_ctx contains the inpout context
+ * @return none
+ */
+void xhci_slot_copy(struct xhci_ctrl *ctrl, struct xhci_container_ctx *in_ctx,
+ struct xhci_container_ctx *out_ctx)
+{
+ struct xhci_slot_ctx *in_slot_ctx;
+ struct xhci_slot_ctx *out_slot_ctx;
+
+ in_slot_ctx = xhci_get_slot_ctx(ctrl, in_ctx);
+ out_slot_ctx = xhci_get_slot_ctx(ctrl, out_ctx);
+
+ in_slot_ctx->dev_info = out_slot_ctx->dev_info;
+ in_slot_ctx->dev_info2 = out_slot_ctx->dev_info2;
+ in_slot_ctx->tt_info = out_slot_ctx->tt_info;
+ in_slot_ctx->dev_state = out_slot_ctx->dev_state;
+}
+
+/**
+ * Setup an xHCI virtual device for a Set Address command
+ *
+ * @param udev pointer to the Device Data Structure
+ * @return returns negative value on failure else 0 on success
+ */
+void xhci_setup_addressable_virt_dev(struct usb_device *udev)
+{
+ struct usb_device *hop = udev;
+ struct xhci_virt_device *virt_dev;
+ struct xhci_ep_ctx *ep0_ctx;
+ struct xhci_slot_ctx *slot_ctx;
+ u32 port_num = 0;
+ u64 trb_64 = 0;
+ struct xhci_ctrl *ctrl = udev->controller;
+
+ virt_dev = ctrl->devs[udev->slot_id];
+
+ BUG_ON(!virt_dev);
+
+ /* Extract the EP0 and Slot Ctrl */
+ ep0_ctx = xhci_get_ep_ctx(ctrl, virt_dev->in_ctx, 0);
+ slot_ctx = xhci_get_slot_ctx(ctrl, virt_dev->in_ctx);
+
+ /* Only the control endpoint is valid - one endpoint context */
+ slot_ctx->dev_info |= cpu_to_le32(LAST_CTX(1) | 0);
+
+ switch (udev->speed) {
+ case USB_SPEED_SUPER:
+ slot_ctx->dev_info |= cpu_to_le32(SLOT_SPEED_SS);
+ break;
+ case USB_SPEED_HIGH:
+ slot_ctx->dev_info |= cpu_to_le32(SLOT_SPEED_HS);
+ break;
+ case USB_SPEED_FULL:
+ slot_ctx->dev_info |= cpu_to_le32(SLOT_SPEED_FS);
+ break;
+ case USB_SPEED_LOW:
+ slot_ctx->dev_info |= cpu_to_le32(SLOT_SPEED_LS);
+ break;
+ default:
+ /* Speed was set earlier, this shouldn't happen. */
+ BUG();
+ }
+
+ /* Extract the root hub port number */
+ if (hop->parent)
+ while (hop->parent->parent)
+ hop = hop->parent;
+ port_num = hop->portnr;
+ debug("port_num = %d\n", port_num);
+
+ slot_ctx->dev_info2 |=
+ cpu_to_le32(((port_num & ROOT_HUB_PORT_MASK) <<
+ ROOT_HUB_PORT_SHIFT));
+
+ /* Step 4 - ring already allocated */
+ /* Step 5 */
+ ep0_ctx->ep_info2 = cpu_to_le32(CTRL_EP << EP_TYPE_SHIFT);
+ debug("SPEED = %d\n", udev->speed);
+
+ switch (udev->speed) {
+ case USB_SPEED_SUPER:
+ ep0_ctx->ep_info2 |= cpu_to_le32(((512 & MAX_PACKET_MASK) <<
+ MAX_PACKET_SHIFT));
+ debug("Setting Packet size = 512bytes\n");
+ break;
+ case USB_SPEED_HIGH:
+ /* USB core guesses at a 64-byte max packet first for FS devices */
+ case USB_SPEED_FULL:
+ ep0_ctx->ep_info2 |= cpu_to_le32(((64 & MAX_PACKET_MASK) <<
+ MAX_PACKET_SHIFT));
+ debug("Setting Packet size = 64bytes\n");
+ break;
+ case USB_SPEED_LOW:
+ ep0_ctx->ep_info2 |= cpu_to_le32(((8 & MAX_PACKET_MASK) <<
+ MAX_PACKET_SHIFT));
+ debug("Setting Packet size = 8bytes\n");
+ break;
+ default:
+ /* New speed? */
+ BUG();
+ }
+
+ /* EP 0 can handle "burst" sizes of 1, so Max Burst Size field is 0 */
+ ep0_ctx->ep_info2 |=
+ cpu_to_le32(((0 & MAX_BURST_MASK) << MAX_BURST_SHIFT) |
+ ((3 & ERROR_COUNT_MASK) << ERROR_COUNT_SHIFT));
+
+ trb_64 = (uintptr_t)virt_dev->eps[0].ring->first_seg->trbs;
+ ep0_ctx->deq = cpu_to_le64(trb_64 | virt_dev->eps[0].ring->cycle_state);
+
+ /* Steps 7 and 8 were done in xhci_alloc_virt_device() */
+
+ xhci_flush_cache((uint32_t)ep0_ctx, sizeof(struct xhci_ep_ctx));
+ xhci_flush_cache((uint32_t)slot_ctx, sizeof(struct xhci_slot_ctx));
+}
Code Review / kvmfornfv.git / blobdiff