[U-Boot] [PATCH v2 1/7] USB: xHCI: Add stack support for xHCI

This adds stack layer for eXtensible Host Controller Interface which facilitates use of USB 3.0 in host mode.

Adapting xHCI host controller driver in linux-kernel by Sarah Sharp to needs in u-boot.

This adds the basic xHCI host controller driver with bare minimum features: - Control/Bulk transfer support has been added with required infrastructure for necessary xHC data structures. - Stream protocol hasn't been supported yet. - No support for quirky devices has been added.

Signed-off-by: Vikas C Sajjan vikas.sajjan@samsung.com Signed-off-by: Julius Werner jwerner@chromium.org Signed-off-by: Vivek Gautam gautam.vivek@samsung.com Cc: Simon Glass sjg@chromium.org Cc: Minkyu Kang mk7.kang@samsung.com Cc: Dan Murphy dmurphy@ti.com Cc: Marek Vasut marex@denx.de --- common/usb.c | 27 +- drivers/usb/host/Makefile | 3 + drivers/usb/host/xhci-mem.c | 731 ++++++++++++++++++++++++ drivers/usb/host/xhci-ring.c | 950 +++++++++++++++++++++++++++++++ drivers/usb/host/xhci.c | 1040 ++++++++++++++++++++++++++++++++++ drivers/usb/host/xhci.h | 1280 ++++++++++++++++++++++++++++++++++++++++++ include/usb.h | 9 +- 7 files changed, 4037 insertions(+), 3 deletions(-) create mode 100644 drivers/usb/host/xhci-mem.c create mode 100644 drivers/usb/host/xhci-ring.c create mode 100644 drivers/usb/host/xhci.c create mode 100644 drivers/usb/host/xhci.h

diff --git a/common/usb.c b/common/usb.c index c97f522..e7800fa 100644 --- a/common/usb.c +++ b/common/usb.c @@ -855,6 +855,16 @@ void usb_free_device(void) }

/* + * XHCI issues Enable Slot command and thereafter + * allocates device contexts. Provide a weak alias + * function for the purpose, so that XHCI overrides it + * and EHCI/OHCI just work out of the box. + */ +__weak int usb_alloc_device(struct usb_device *udev) +{ + return 0; +} +/* * By the time we get here, the device has gotten a new device ID * and is in the default state. We need to identify the thing and * get the ball rolling.. @@ -867,6 +877,17 @@ int usb_new_device(struct usb_device *dev) int tmp; ALLOC_CACHE_ALIGN_BUFFER(unsigned char, tmpbuf, USB_BUFSIZ);

+ /* + * Allocate usb 3.0 device context. + * USB 3.0 (xHCI) protocol tries to allocate device slot + * and related data structures first. This call does that. + * Refer to sec 4.3.2 in xHCI spec rev1.0 + */ + if (usb_alloc_device(dev)) { + printf("Cannot allocate device context to get SLOT_ID\n"); + return -1; + } + /* We still haven't set the Address yet */ addr = dev->devnum; dev->devnum = 0; @@ -897,7 +918,7 @@ int usb_new_device(struct usb_device *dev) * http://sourceforge.net/mailarchive/forum.php? * thread_id=5729457&forum_id=5398 */ - struct usb_device_descriptor *desc; + __maybe_unused struct usb_device_descriptor *desc; int port = -1; struct usb_device *parent = dev->parent; unsigned short portstatus; @@ -914,6 +935,7 @@ int usb_new_device(struct usb_device *dev) dev->epmaxpacketin[0] = 64; dev->epmaxpacketout[0] = 64;

+#ifndef CONFIG_USB_XHCI err = usb_get_descriptor(dev, USB_DT_DEVICE, 0, desc, 64); if (err < 0) { debug("usb_new_device: usb_get_descriptor() failed\n"); @@ -926,11 +948,12 @@ int usb_new_device(struct usb_device *dev) * to differentiate between HUB and DEVICE. */ dev->descriptor.bDeviceClass = desc->bDeviceClass; +#endif

- /* find the port number we're at */ if (parent) { int j;

+ /* find the port number we're at */ for (j = 0; j < parent->maxchild; j++) { if (parent->children[j] == dev) { port = j; diff --git a/drivers/usb/host/Makefile b/drivers/usb/host/Makefile index ff6c80e..6bd6c86 100644 --- a/drivers/usb/host/Makefile +++ b/drivers/usb/host/Makefile @@ -42,6 +42,9 @@ COBJS-$(CONFIG_USB_EHCI_SPEAR) += ehci-spear.o COBJS-$(CONFIG_USB_EHCI_TEGRA) += ehci-tegra.o COBJS-$(CONFIG_USB_EHCI_VCT) += ehci-vct.o

+# xhci +COBJS-$(CONFIG_USB_XHCI) += xhci.o xhci-mem.o xhci-ring.o + COBJS := $(COBJS-y) SRCS := $(COBJS:.o=.c) OBJS := $(addprefix $(obj),$(COBJS)) diff --git a/drivers/usb/host/xhci-mem.c b/drivers/usb/host/xhci-mem.c new file mode 100644 index 0000000..709ef7e --- /dev/null +++ b/drivers/usb/host/xhci-mem.c @@ -0,0 +1,731 @@ +/* + * USB HOST XHCI Controller stack + * + * Copyright (C) 2013 Samsung Electronics Co.Ltd + * Vivek Gautam gautam.vivek@samsung.com + * Vikas Sajjan vikas.sajjan@samsung.com + * + * Based on xHCI host controller driver in linux-kernel + * by Sarah Sharp. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of + * the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, + * MA 02110-1301 USA + */ + +#include <common.h> +#include <asm/byteorder.h> +#include <usb.h> +#include <asm/io.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 -1; + } + + ctrl->devs[slot_id] = (struct xhci_virt_device *) + malloc(sizeof(struct xhci_virt_device)); + + if (!ctrl->devs[slot_id]) { + printf("Failed to allocate virtual device\n"); + return -1; + } + + 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) { + printf("Failed to allocate out context for virt dev\n"); + return -1; + } + + /* 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) { + printf("Failed to allocate in context for virt dev\n"); + return -1; + } + + /* 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) { + printf("unable to allocate DCBA\n"); + return -1; + } + + 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)); +} diff --git a/drivers/usb/host/xhci-ring.c b/drivers/usb/host/xhci-ring.c new file mode 100644 index 0000000..8340850 --- /dev/null +++ b/drivers/usb/host/xhci-ring.c @@ -0,0 +1,950 @@ +/* + * USB HOST XHCI Controller stack + * + * Copyright (C) 2013 Samsung Electronics Co.Ltd + * Vivek Gautam gautam.vivek@samsung.com + * Vikas Sajjan vikas.sajjan@samsung.com + * + * Based on xHCI host controller driver in linux-kernel + * by Sarah Sharp. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of + * the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, + * MA 02110-1301 USA + */ + +#include <common.h> +#include <asm/byteorder.h> +#include <usb.h> +#include <asm/io.h> +#include <asm/unaligned.h> +#include <asm-generic/errno.h> + +#include "xhci.h" + +/** + * Is this TRB a link TRB or was the last TRB the last TRB in this event ring + * segment? I.e. would the updated event TRB pointer step off the end of the + * event seg ? + * + * @param ctrl Host controller data structure + * @param ring pointer to the ring + * @param seg poniter to the segment to which TRB belongs + * @param trb poniter to the ring trb + * @return 1 if this TRB a link TRB else 0 + */ +static int last_trb(struct xhci_ctrl *ctrl, struct xhci_ring *ring, + struct xhci_segment *seg, union xhci_trb *trb) +{ + if (ring == ctrl->event_ring) + return trb == &seg->trbs[TRBS_PER_SEGMENT]; + else + return TRB_TYPE_LINK_LE32(trb->link.control); +} + +/** + * Does this link TRB point to the first segment in a ring, + * or was the previous TRB the last TRB on the last segment in the ERST? + * + * @param ctrl Host controller data structure + * @param ring pointer to the ring + * @param seg poniter to the segment to which TRB belongs + * @param trb poniter to the ring trb + * @return 1 if this TRB is the last TRB on the last segment else 0 + */ +static bool last_trb_on_last_seg(struct xhci_ctrl *ctrl, + struct xhci_ring *ring, + struct xhci_segment *seg, + union xhci_trb *trb) +{ + if (ring == ctrl->event_ring) + return ((trb == &seg->trbs[TRBS_PER_SEGMENT]) && + (seg->next == ring->first_seg)); + else + return le32_to_cpu(trb->link.control) & LINK_TOGGLE; +} + +/** + * See Cycle bit rules. SW is the consumer for the event ring only. + * Don't make a ring full of link TRBs. That would be dumb and this would loop. + * + * If we've just enqueued a TRB that is in the middle of a TD (meaning the + * chain bit is set), then set the chain bit in all the following link TRBs. + * If we've enqueued the last TRB in a TD, make sure the following link TRBs + * have their chain bit cleared (so that each Link TRB is a separate TD). + * + * Section 6.4.4.1 of the 0.95 spec says link TRBs cannot have the chain bit + * set, but other sections talk about dealing with the chain bit set. This was + * fixed in the 0.96 specification errata, but we have to assume that all 0.95 + * xHCI hardware can't handle the chain bit being cleared on a link TRB. + * + * @param ctrl Host controller data structure + * @param ring pointer to the ring + * @param more_trbs_coming flag to indicate whether more trbs + * are expected or NOT. + * Will you enqueue more TRBs before calling + * prepare_ring()? + * @return none + */ +static void inc_enq(struct xhci_ctrl *ctrl, struct xhci_ring *ring, + bool more_trbs_coming) +{ + u32 chain; + union xhci_trb *next; + + chain = le32_to_cpu(ring->enqueue->generic.field[3]) & TRB_CHAIN; + next = ++(ring->enqueue); + + /* + * Update the dequeue pointer further if that was a link TRB or we're at + * the end of an event ring segment (which doesn't have link TRBS) + */ + while (last_trb(ctrl, ring, ring->enq_seg, next)) { + if (ring != ctrl->event_ring) { + /* + * If the caller doesn't plan on enqueueing more + * TDs before ringing the doorbell, then we + * don't want to give the link TRB to the + * hardware just yet. We'll give the link TRB + * back in prepare_ring() just before we enqueue + * the TD at the top of the ring. + */ + if (!chain && !more_trbs_coming) + break; + + /* + * If we're not dealing with 0.95 hardware or + * isoc rings on AMD 0.96 host, + * carry over the chain bit of the previous TRB + * (which may mean the chain bit is cleared). + */ + next->link.control &= cpu_to_le32(~TRB_CHAIN); + next->link.control |= cpu_to_le32(chain); + + next->link.control ^= cpu_to_le32(TRB_CYCLE); + xhci_flush_cache((uint32_t)next, + sizeof(union xhci_trb)); + } + /* Toggle the cycle bit after the last ring segment. */ + if (last_trb_on_last_seg(ctrl, ring, + ring->enq_seg, next)) + ring->cycle_state = (ring->cycle_state ? 0 : 1); + + ring->enq_seg = ring->enq_seg->next; + ring->enqueue = ring->enq_seg->trbs; + next = ring->enqueue; + } +} + +/** + * See Cycle bit rules. SW is the consumer for the event ring only. + * Don't make a ring full of link TRBs. That would be dumb and this would loop. + * + * @param ctrl Host controller data structure + * @param ring Ring whose Dequeue TRB pointer needs to be incremented. + * return none + */ +static void inc_deq(struct xhci_ctrl *ctrl, struct xhci_ring *ring) +{ + do { + /* + * Update the dequeue pointer further if that was a link TRB or + * we're at the end of an event ring segment (which doesn't have + * link TRBS) + */ + if (last_trb(ctrl, ring, ring->deq_seg, ring->dequeue)) { + if (ring == ctrl->event_ring && + last_trb_on_last_seg(ctrl, ring, + ring->deq_seg, ring->dequeue)) { + ring->cycle_state = (ring->cycle_state ? 0 : 1); + } + ring->deq_seg = ring->deq_seg->next; + ring->dequeue = ring->deq_seg->trbs; + } else { + ring->dequeue++; + } + } while (last_trb(ctrl, ring, ring->deq_seg, ring->dequeue)); +} + +/** + * Generic function for queueing a TRB on a ring. + * The caller must have checked to make sure there's room on the ring. + * + * @param more_trbs_coming: Will you enqueue more TRBs before calling + * prepare_ring()? + * @param ctrl Host controller data structure + * @param ring pointer to the ring + * @param more_trbs_coming flag to indicate whether more trbs + * @param trb_fields pointer to trb field array containing TRB contents + * @return pointer to the enqueued trb + */ +static struct xhci_generic_trb *queue_trb(struct xhci_ctrl *ctrl, + struct xhci_ring *ring, + bool more_trbs_coming, + unsigned int *trb_fields) +{ + struct xhci_generic_trb *trb; + int i; + + trb = &ring->enqueue->generic; + + for (i = 0; i < 4; i++) + trb->field[i] = cpu_to_le32(trb_fields[i]); + + xhci_flush_cache((uint32_t)trb, sizeof(struct xhci_generic_trb)); + + inc_enq(ctrl, ring, more_trbs_coming); + + return trb; +} + +/** + * Does various checks on the endpoint ring, and makes it ready + * to queue num_trbs. + * + * @param ctrl Host controller data structure + * @param ep_ring pointer to the EP Transfer Ring + * @param ep_state State of the End Point + * @return error code in case of invalid ep_state, 0 on success + */ +static int prepare_ring(struct xhci_ctrl *ctrl, struct xhci_ring *ep_ring, + u32 ep_state) +{ + union xhci_trb *next = ep_ring->enqueue; + + /* Make sure the endpoint has been added to xHC schedule */ + switch (ep_state) { + case EP_STATE_DISABLED: + /* + * USB core changed config/interfaces without notifying us, + * or hardware is reporting the wrong state. + */ + printf("WARN urb submitted to disabled ep\n"); + return -ENOENT; + case EP_STATE_ERROR: + printf("WARN waiting for error on ep to be cleared\n"); + return -EINVAL; + case EP_STATE_HALTED: + printf("WARN halted endpoint, queueing URB anyway.\n"); + case EP_STATE_STOPPED: + case EP_STATE_RUNNING: + debug("EP STATE RUNNING.\n"); + break; + default: + printf("ERROR unknown endpoint state for ep\n"); + return -EINVAL; + } + + while (last_trb(ctrl, ep_ring, ep_ring->enq_seg, next)) { + /* + * If we're not dealing with 0.95 hardware or isoc rings + * on AMD 0.96 host, clear the chain bit. + */ + next->link.control &= cpu_to_le32(~TRB_CHAIN); + + next->link.control ^= cpu_to_le32(TRB_CYCLE); + + xhci_flush_cache((uint32_t)next, sizeof(union xhci_trb)); + + /* Toggle the cycle bit after the last ring segment. */ + if (last_trb_on_last_seg(ctrl, ep_ring, + ep_ring->enq_seg, next)) + ep_ring->cycle_state = (ep_ring->cycle_state ? 0 : 1); + ep_ring->enq_seg = ep_ring->enq_seg->next; + ep_ring->enqueue = ep_ring->enq_seg->trbs; + next = ep_ring->enqueue; + } + + return 0; +} + +/** + * Generic function for queueing a command TRB on the command ring. + * Check to make sure there's room on the command ring for one command TRB. + * + * @param ctrl Host controller data structure + * @param ptr Pointer address to write in the first two fields (opt.) + * @param slot_id Slot ID to encode in the flags field (opt.) + * @param ep_index Endpoint index to encode in the flags field (opt.) + * @param cmd Command type to enqueue + * @return none + */ +void xhci_queue_command(struct xhci_ctrl *ctrl, u8 *ptr, u32 slot_id, + u32 ep_index, trb_type cmd) +{ + u32 fields[4]; + u64 val_64 = (uintptr_t)ptr; + + BUG_ON(prepare_ring(ctrl, ctrl->cmd_ring, EP_STATE_RUNNING)); + + fields[0] = lower_32_bits(val_64); + fields[1] = upper_32_bits(val_64); + fields[2] = 0; + fields[3] = TRB_TYPE(cmd) | EP_ID_FOR_TRB(ep_index) | + SLOT_ID_FOR_TRB(slot_id) | ctrl->cmd_ring->cycle_state; + + queue_trb(ctrl, ctrl->cmd_ring, false, fields); + + /* Ring the command ring doorbell */ + xhci_writel(&ctrl->dba->doorbell[0], DB_VALUE_HOST); +} + +/** + * The TD size is the number of bytes remaining in the TD (including this TRB), + * right shifted by 10. + * It must fit in bits 21:17, so it can't be bigger than 31. + * + * @param remainder remaining packets to be sent + * @return remainder if remainder is less than max else max + */ +static u32 xhci_td_remainder(unsigned int remainder) +{ + u32 max = (1 << (21 - 17 + 1)) - 1; + + if ((remainder >> 10) >= max) + return max << 17; + else + return (remainder >> 10) << 17; +} + +/** + * Finds out the remanining packets to be sent + * + * @param running_total total size sent so far + * @param trb_buff_len length of the TRB Buffer + * @param total_packet_count total packet count + * @param maxpacketsize max packet size of current pipe + * @param num_trbs_left number of TRBs left to be processed + * @return 0 if running_total or trb_buff_len is 0, else remainder + */ +static u32 xhci_v1_0_td_remainder(int running_total, + int trb_buff_len, + unsigned int total_packet_count, + int maxpacketsize, + unsigned int num_trbs_left) +{ + int packets_transferred; + + /* One TRB with a zero-length data packet. */ + if (num_trbs_left == 0 || (running_total == 0 && trb_buff_len == 0)) + return 0; + + /* + * All the TRB queueing functions don't count the current TRB in + * running_total. + */ + packets_transferred = (running_total + trb_buff_len) / maxpacketsize; + + if ((total_packet_count - packets_transferred) > 31) + return 31 << 17; + return (total_packet_count - packets_transferred) << 17; +} + +/** + * Ring the doorbell of the End Point + * + * @param udev pointer to the USB device structure + * @param ep_index index of the endpoint + * @param start_cycle cycle flag of the first TRB + * @param start_trb pionter to the first TRB + * @return none + */ +static void giveback_first_trb(struct usb_device *udev, int ep_index, + int start_cycle, + struct xhci_generic_trb *start_trb) +{ + struct xhci_ctrl *ctrl = udev->controller; + + /* + * Pass all the TRBs to the hardware at once and make sure this write + * isn't reordered. + */ + if (start_cycle) + start_trb->field[3] |= cpu_to_le32(start_cycle); + else + start_trb->field[3] &= cpu_to_le32(~TRB_CYCLE); + + xhci_flush_cache((uint32_t)start_trb, sizeof(struct xhci_generic_trb)); + + /* Ringing EP doorbell here */ + xhci_writel(&ctrl->dba->doorbell[udev->slot_id], + DB_VALUE(ep_index, 0)); + + return; +} + +/**** POLLING mechanism for XHCI ****/ + +/** + * Finalizes a handled event TRB by advancing our dequeue pointer and giving + * the TRB back to the hardware for recycling. Must call this exactly once at + * the end of each event handler, and not touch the TRB again afterwards. + * + * @param ctrl Host controller data structure + * @return none + */ +void xhci_acknowledge_event(struct xhci_ctrl *ctrl) +{ + /* Advance our dequeue pointer to the next event */ + inc_deq(ctrl, ctrl->event_ring); + + /* Inform the hardware */ + xhci_writeq(&ctrl->ir_set->erst_dequeue, + (uintptr_t)ctrl->event_ring->dequeue | ERST_EHB); +} + +/** + * Checks if there is a new event to handle on the event ring. + * + * @param ctrl Host controller data structure + * @return 0 if failure else 1 on success + */ +static int event_ready(struct xhci_ctrl *ctrl) +{ + union xhci_trb *event; + + xhci_inval_cache((uint32_t)ctrl->event_ring->dequeue, + sizeof(union xhci_trb)); + + event = ctrl->event_ring->dequeue; + + /* Does the HC or OS own the TRB? */ + if ((le32_to_cpu(event->event_cmd.flags) & TRB_CYCLE) != + ctrl->event_ring->cycle_state) + return 0; + + return 1; +} + +/** + * Waits for a specific type of event and returns it. Discards unexpected + * events. Caller *must* call xhci_acknowledge_event() after it is finished + * processing the event, and must not access the returned pointer afterwards. + * + * @param ctrl Host controller data structure + * @param expected TRB type expected from Event TRB + * @return pointer to event trb + */ +union xhci_trb *xhci_wait_for_event(struct xhci_ctrl *ctrl, trb_type expected) +{ + trb_type type; + unsigned long ts = get_timer(0); + + do { + union xhci_trb *event = ctrl->event_ring->dequeue; + + if (!event_ready(ctrl)) + continue; + + type = TRB_FIELD_TO_TYPE(le32_to_cpu(event->event_cmd.flags)); + if (type == expected) + return event; + + if (type == TRB_PORT_STATUS) + /* TODO: remove this once enumeration has been reworked */ + /* + * Port status change events always have a + * successful completion code + */ + BUG_ON(GET_COMP_CODE( + le32_to_cpu(event->generic.field[2])) != + COMP_SUCCESS); + else + printf("Unexpected XHCI event TRB, skipping... " + "(%08x %08x %08x %08x)\n", + le32_to_cpu(event->generic.field[0]), + le32_to_cpu(event->generic.field[1]), + le32_to_cpu(event->generic.field[2]), + le32_to_cpu(event->generic.field[3])); + + xhci_acknowledge_event(ctrl); + } while (get_timer(ts) < XHCI_TIMEOUT); + + if (expected == TRB_TRANSFER) + return NULL; + + printf("XHCI timeout on event type %d... cannot recover.\n", expected); + BUG(); +} + +/* + * Stops transfer processing for an endpoint and throws away all unprocessed + * TRBs by setting the xHC's dequeue pointer to our enqueue pointer. The next + * xhci_bulk_tx/xhci_ctrl_tx on this enpoint will add new transfers there and + * ring the doorbell, causing this endpoint to start working again. + * (Careful: This will BUG() when there was no transfer in progress. Shouldn't + * happen in practice for current uses and is too complicated to fix right now.) + */ +static void abort_td(struct usb_device *udev, int ep_index) +{ + struct xhci_ctrl *ctrl = udev->controller; + struct xhci_ring *ring = ctrl->devs[udev->slot_id]->eps[ep_index].ring; + union xhci_trb *event; + u32 field; + + xhci_queue_command(ctrl, NULL, udev->slot_id, ep_index, TRB_STOP_RING); + + event = xhci_wait_for_event(ctrl, TRB_TRANSFER); + field = le32_to_cpu(event->trans_event.flags); + BUG_ON(TRB_TO_SLOT_ID(field) != udev->slot_id); + BUG_ON(TRB_TO_EP_INDEX(field) != ep_index); + BUG_ON(GET_COMP_CODE(le32_to_cpu(event->trans_event.transfer_len + != COMP_STOP))); + xhci_acknowledge_event(ctrl); + + event = xhci_wait_for_event(ctrl, TRB_COMPLETION); + BUG_ON(TRB_TO_SLOT_ID(le32_to_cpu(event->event_cmd.flags)) + != udev->slot_id || GET_COMP_CODE(le32_to_cpu( + event->event_cmd.status)) != COMP_SUCCESS); + xhci_acknowledge_event(ctrl); + + xhci_queue_command(ctrl, (void *)((uintptr_t)ring->enqueue | + ring->cycle_state), udev->slot_id, ep_index, TRB_SET_DEQ); + event = xhci_wait_for_event(ctrl, TRB_COMPLETION); + BUG_ON(TRB_TO_SLOT_ID(le32_to_cpu(event->event_cmd.flags)) + != udev->slot_id || GET_COMP_CODE(le32_to_cpu( + event->event_cmd.status)) != COMP_SUCCESS); + xhci_acknowledge_event(ctrl); +} + +static void record_transfer_result(struct usb_device *udev, + union xhci_trb *event, int length) +{ + udev->act_len = min(length, length - + EVENT_TRB_LEN(le32_to_cpu(event->trans_event.transfer_len))); + + switch (GET_COMP_CODE(le32_to_cpu(event->trans_event.transfer_len))) { + case COMP_SUCCESS: + BUG_ON(udev->act_len != length); + /* fallthrough */ + case COMP_SHORT_TX: + udev->status = 0; + break; + case COMP_STALL: + udev->status = USB_ST_STALLED; + break; + case COMP_DB_ERR: + case COMP_TRB_ERR: + udev->status = USB_ST_BUF_ERR; + break; + case COMP_BABBLE: + udev->status = USB_ST_BABBLE_DET; + break; + default: + udev->status = 0x80; /* USB_ST_TOO_LAZY_TO_MAKE_A_NEW_MACRO */ + } +} + +/**** Bulk and Control transfer methods ****/ +/** + * Queues up the BULK Request + * + * @param udev pointer to the USB device structure + * @param pipe contains the DIR_IN or OUT , devnum + * @param length length of the buffer + * @param buffer buffer to be read/written based on the request + * @return returns 0 if successful else -1 on failure + */ +int xhci_bulk_tx(struct usb_device *udev, unsigned long pipe, + int length, void *buffer) +{ + int num_trbs = 0; + struct xhci_generic_trb *start_trb; + bool first_trb = 0; + int start_cycle; + u32 field = 0; + u32 length_field = 0; + struct xhci_ctrl *ctrl = udev->controller; + int slot_id = udev->slot_id; + int ep_index; + struct xhci_virt_device *virt_dev; + struct xhci_ep_ctx *ep_ctx; + struct xhci_ring *ring; /* EP transfer ring */ + union xhci_trb *event; + + int running_total, trb_buff_len; + unsigned int total_packet_count; + int maxpacketsize; + u64 addr; + int ret; + u32 trb_fields[4]; + u64 val_64 = (uintptr_t)buffer; + + debug("dev=%p, pipe=%lx, buffer=%p, length=%d\n", + udev, pipe, buffer, length); + + ep_index = usb_pipe_ep_index(pipe); + virt_dev = ctrl->devs[slot_id]; + + xhci_inval_cache((uint32_t)virt_dev->out_ctx->bytes, + virt_dev->out_ctx->size); + + ep_ctx = xhci_get_ep_ctx(ctrl, virt_dev->out_ctx, ep_index); + + ring = virt_dev->eps[ep_index].ring; + /* + * How much data is (potentially) left before the 64KB boundary? + * XHCI Spec puts restriction( TABLE 49 and 6.4.1 section of XHCI Spec) + * that the buffer should not span 64KB boundary. if so + * we send request in more than 1 TRB by chaining them. + */ + running_total = TRB_MAX_BUFF_SIZE - + (lower_32_bits(val_64) & (TRB_MAX_BUFF_SIZE - 1)); + trb_buff_len = running_total; + running_total &= TRB_MAX_BUFF_SIZE - 1; + + /* + * If there's some data on this 64KB chunk, or we have to send a + * zero-length transfer, we need at least one TRB + */ + if (running_total != 0 || length == 0) + num_trbs++; + + /* How many more 64KB chunks to transfer, how many more TRBs? */ + while (running_total < length) { + num_trbs++; + running_total += TRB_MAX_BUFF_SIZE; + } + + /* + * XXX: Calling routine prepare_ring() called in place of + * prepare_trasfer() as there in 'Linux' since we are not + * maintaining multiple TDs/transfer at the same time. + */ + ret = prepare_ring(ctrl, ring, + le32_to_cpu(ep_ctx->ep_info) & EP_STATE_MASK); + if (ret < 0) + return ret; + + /* + * Don't give the first TRB to the hardware (by toggling the cycle bit) + * until we've finished creating all the other TRBs. The ring's cycle + * state may change as we enqueue the other TRBs, so save it too. + */ + start_trb = &ring->enqueue->generic; + start_cycle = ring->cycle_state; + + running_total = 0; + maxpacketsize = usb_maxpacket(udev, pipe); + + total_packet_count = DIV_ROUND_UP(length, maxpacketsize); + + /* How much data is in the first TRB? */ + /* + * How much data is (potentially) left before the 64KB boundary? + * XHCI Spec puts restriction( TABLE 49 and 6.4.1 section of XHCI Spec) + * that the buffer should not span 64KB boundary. if so + * we send request in more than 1 TRB by chaining them. + */ + addr = val_64; + + if (trb_buff_len > length) + trb_buff_len = length; + + first_trb = true; + + /* flush the buffer before use */ + xhci_flush_cache((uint32_t)buffer, length); + + /* Queue the first TRB, even if it's zero-length */ + do { + u32 remainder = 0; + field = 0; + /* Don't change the cycle bit of the first TRB until later */ + if (first_trb) { + first_trb = false; + if (start_cycle == 0) + field |= TRB_CYCLE; + } else { + field |= ring->cycle_state; + } + + /* + * Chain all the TRBs together; clear the chain bit in the last + * TRB to indicate it's the last TRB in the chain. + */ + if (num_trbs > 1) + field |= TRB_CHAIN; + else + field |= TRB_IOC; + + /* Only set interrupt on short packet for IN endpoints */ + if (usb_pipein(pipe)) + field |= TRB_ISP; + + /* Set the TRB length, TD size, and interrupter fields. */ + if (HC_VERSION(xhci_readl(&ctrl->hccr->cr_capbase)) < 0x100) + remainder = xhci_td_remainder(length - running_total); + else + remainder = xhci_v1_0_td_remainder(running_total, + trb_buff_len, + total_packet_count, + maxpacketsize, + num_trbs - 1); + + length_field = ((trb_buff_len & TRB_LEN_MASK) | + remainder | + ((0 & TRB_INTR_TARGET_MASK) << + TRB_INTR_TARGET_SHIFT)); + + trb_fields[0] = lower_32_bits(addr); + trb_fields[1] = upper_32_bits(addr); + trb_fields[2] = length_field; + trb_fields[3] = field | (TRB_NORMAL << TRB_TYPE_SHIFT); + + queue_trb(ctrl, ring, (num_trbs > 1), trb_fields); + + --num_trbs; + + running_total += trb_buff_len; + + /* Calculate length for next transfer */ + addr += trb_buff_len; + trb_buff_len = min((length - running_total), TRB_MAX_BUFF_SIZE); + } while (running_total < length); + + giveback_first_trb(udev, ep_index, start_cycle, start_trb); + + event = xhci_wait_for_event(ctrl, TRB_TRANSFER); + if (!event) { + debug("XHCI bulk transfer timed out, aborting...\n"); + abort_td(udev, ep_index); + udev->status = USB_ST_NAK_REC; /* closest thing to a timeout */ + udev->act_len = 0; + return -1; + } + field = le32_to_cpu(event->trans_event.flags); + + BUG_ON(TRB_TO_SLOT_ID(field) != slot_id); + BUG_ON(TRB_TO_EP_INDEX(field) != ep_index); + BUG_ON(*(void **)(uintptr_t)le64_to_cpu(event->trans_event.buffer) - + buffer > (size_t)length); + + record_transfer_result(udev, event, length); + xhci_acknowledge_event(ctrl); + xhci_inval_cache((uint32_t)buffer, length); + + return (udev->status != USB_ST_NOT_PROC) ? 0 : -1; +} + +/** + * Queues up the Control Transfer Request + * + * @param udev pointer to the USB device structure + * @param pipe contains the DIR_IN or OUT , devnum + * @param req request type + * @param length length of the buffer + * @param buffer buffer to be read/written based on the request + * @return returns 0 if successful else -1 on failure + */ +int xhci_ctrl_tx(struct usb_device *udev, unsigned long pipe, + struct devrequest *req, int length, + void *buffer) +{ + int ret; + int start_cycle; + int num_trbs; + u32 field; + u32 length_field; + u64 buf_64 = 0; + struct xhci_generic_trb *start_trb; + struct xhci_ctrl *ctrl = udev->controller; + int slot_id = udev->slot_id; + int ep_index; + u32 trb_fields[4]; + struct xhci_virt_device *virt_dev = ctrl->devs[slot_id]; + struct xhci_ring *ep_ring; + union xhci_trb *event; + + debug("req=%u (%#x), type=%u (%#x), value=%u (%#x), index=%u\n", + req->request, req->request, + req->requesttype, req->requesttype, + le16_to_cpu(req->value), le16_to_cpu(req->value), + le16_to_cpu(req->index)); + + ep_index = usb_pipe_ep_index(pipe); + + ep_ring = virt_dev->eps[ep_index].ring; + + /* + * Check to see if the max packet size for the default control + * endpoint changed during FS device enumeration + */ + if (udev->speed == USB_SPEED_FULL) { + ret = xhci_check_maxpacket(udev); + if (ret < 0) + return ret; + } + + xhci_inval_cache((uint32_t)virt_dev->out_ctx->bytes, + virt_dev->out_ctx->size); + + struct xhci_ep_ctx *ep_ctx = NULL; + ep_ctx = xhci_get_ep_ctx(ctrl, virt_dev->out_ctx, ep_index); + + /* 1 TRB for setup, 1 for status */ + num_trbs = 2; + /* + * Don't need to check if we need additional event data and normal TRBs, + * since data in control transfers will never get bigger than 16MB + * XXX: can we get a buffer that crosses 64KB boundaries? + */ + + if (length > 0) + num_trbs++; + /* + * XXX: Calling routine prepare_ring() called in place of + * prepare_trasfer() as there in 'Linux' since we are not + * maintaining multiple TDs/transfer at the same time. + */ + ret = prepare_ring(ctrl, ep_ring, + le32_to_cpu(ep_ctx->ep_info) & EP_STATE_MASK); + + if (ret < 0) + return ret; + + /* + * Don't give the first TRB to the hardware (by toggling the cycle bit) + * until we've finished creating all the other TRBs. The ring's cycle + * state may change as we enqueue the other TRBs, so save it too. + */ + start_trb = &ep_ring->enqueue->generic; + start_cycle = ep_ring->cycle_state; + + debug("start_trb %p, start_cycle %d\n", start_trb, start_cycle); + + /* Queue setup TRB - see section 6.4.1.2.1 */ + /* FIXME better way to translate setup_packet into two u32 fields? */ + field = 0; + field |= TRB_IDT | (TRB_SETUP << TRB_TYPE_SHIFT); + if (start_cycle == 0) + field |= 0x1; + + /* xHCI 1.0 6.4.1.2.1: Transfer Type field */ + if (HC_VERSION(xhci_readl(&ctrl->hccr->cr_capbase)) == 0x100) { + if (length > 0) { + if (req->requesttype & USB_DIR_IN) + field |= (TRB_DATA_IN << TRB_TX_TYPE_SHIFT); + else + field |= (TRB_DATA_OUT << TRB_TX_TYPE_SHIFT); + } + } + + debug("req->requesttype = %d, req->request = %d," + "le16_to_cpu(req->value) = %d," + "le16_to_cpu(req->index) = %d," + "le16_to_cpu(req->length) = %d\n", + req->requesttype, req->request, le16_to_cpu(req->value), + le16_to_cpu(req->index), le16_to_cpu(req->length)); + + trb_fields[0] = req->requesttype | req->request << 8 | + le16_to_cpu(req->value) << 16; + trb_fields[1] = le16_to_cpu(req->index) | + le16_to_cpu(req->length) << 16; + /* TRB_LEN | (TRB_INTR_TARGET) */ + trb_fields[2] = (8 | ((0 & TRB_INTR_TARGET_MASK) << + TRB_INTR_TARGET_SHIFT)); + /* Immediate data in pointer */ + trb_fields[3] = field; + queue_trb(ctrl, ep_ring, true, trb_fields); + + /* Re-initializing field to zero */ + field = 0; + /* If there's data, queue data TRBs */ + /* Only set interrupt on short packet for IN endpoints */ + if (usb_pipein(pipe)) + field = TRB_ISP | (TRB_DATA << TRB_TYPE_SHIFT); + else + field = (TRB_DATA << TRB_TYPE_SHIFT); + + length_field = (length & TRB_LEN_MASK) | xhci_td_remainder(length) | + ((0 & TRB_INTR_TARGET_MASK) << TRB_INTR_TARGET_SHIFT); + debug("length_field = %d, length = %d," + "xhci_td_remainder(length) = %d , TRB_INTR_TARGET(0) = %d\n", + length_field, (length & TRB_LEN_MASK), + xhci_td_remainder(length), 0); + + if (length > 0) { + if (req->requesttype & USB_DIR_IN) + field |= TRB_DIR_IN; + buf_64 = (uintptr_t)buffer; + + trb_fields[0] = lower_32_bits(buf_64); + trb_fields[1] = upper_32_bits(buf_64); + trb_fields[2] = length_field; + trb_fields[3] = field | ep_ring->cycle_state; + + xhci_flush_cache((uint32_t)buffer, length); + queue_trb(ctrl, ep_ring, true, trb_fields); + } + + /* + * Queue status TRB - + * see Table 7 and sections 4.11.2.2 and 6.4.1.2.3 + */ + + /* If the device sent data, the status stage is an OUT transfer */ + field = 0; + if (length > 0 && req->requesttype & USB_DIR_IN) + field = 0; + else + field = TRB_DIR_IN; + + trb_fields[0] = 0; + trb_fields[1] = 0; + trb_fields[2] = ((0 & TRB_INTR_TARGET_MASK) << TRB_INTR_TARGET_SHIFT); + /* Event on completion */ + trb_fields[3] = field | TRB_IOC | + (TRB_STATUS << TRB_TYPE_SHIFT) | + ep_ring->cycle_state; + + queue_trb(ctrl, ep_ring, false, trb_fields); + + giveback_first_trb(udev, ep_index, start_cycle, start_trb); + + event = xhci_wait_for_event(ctrl, TRB_TRANSFER); + if (!event) + goto abort; + field = le32_to_cpu(event->trans_event.flags); + + BUG_ON(TRB_TO_SLOT_ID(field) != slot_id); + BUG_ON(TRB_TO_EP_INDEX(field) != ep_index); + + record_transfer_result(udev, event, length); + xhci_acknowledge_event(ctrl); + + /* Invalidate buffer to make it available to usb-core */ + if (length > 0) + xhci_inval_cache((uint32_t)buffer, length); + + if (GET_COMP_CODE(le32_to_cpu(event->trans_event.transfer_len)) + == COMP_SHORT_TX) { + /* Short data stage, clear up additional status stage event */ + event = xhci_wait_for_event(ctrl, TRB_TRANSFER); + if (!event) + goto abort; + BUG_ON(TRB_TO_SLOT_ID(field) != slot_id); + BUG_ON(TRB_TO_EP_INDEX(field) != ep_index); + xhci_acknowledge_event(ctrl); + } + + return (udev->status != USB_ST_NOT_PROC) ? 0 : -1; + +abort: + debug("XHCI control transfer timed out, aborting...\n"); + abort_td(udev, ep_index); + udev->status = USB_ST_NAK_REC; + udev->act_len = 0; + return -1; +} diff --git a/drivers/usb/host/xhci.c b/drivers/usb/host/xhci.c new file mode 100644 index 0000000..3e53e3d --- /dev/null +++ b/drivers/usb/host/xhci.c @@ -0,0 +1,1040 @@ +/* + * USB HOST XHCI Controller stack + * + * Copyright (C) 2013 Samsung Electronics Co.Ltd + * Vivek Gautam gautam.vivek@samsung.com + * Vikas Sajjan vikas.sajjan@samsung.com + * + * Based on xHCI host controller driver in linux-kernel + * by Sarah Sharp. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of + * the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, + * MA 02110-1301 USA + */ + +/** + * This file gives the xhci stack for usb3.0 looking into + * xhci specification Rev1.0 (5/21/10). + * The quirk devices support hasn't been given yet. + */ + +#include <common.h> +#include <asm/byteorder.h> +#include <usb.h> +#include <asm/io.h> +#include <malloc.h> +#include <watchdog.h> +#include <asm/cache.h> +#include <asm/unaligned.h> +#include <asm-generic/errno.h> +#include "xhci.h" + +#ifndef CONFIG_USB_MAX_CONTROLLER_COUNT +#define CONFIG_USB_MAX_CONTROLLER_COUNT 1 +#endif + +static struct descriptor { + struct usb_hub_descriptor hub; + struct usb_device_descriptor device; + struct usb_config_descriptor config; + struct usb_interface_descriptor interface; + struct usb_endpoint_descriptor endpoint; + struct usb_ss_ep_comp_descriptor ep_companion; +} __attribute__ ((packed)) descriptor = { + { + 0xc, /* bDescLength */ + 0x2a, /* bDescriptorType: hub descriptor */ + 2, /* bNrPorts -- runtime modified */ + cpu_to_le16(0x8), /* wHubCharacteristics */ + 10, /* bPwrOn2PwrGood */ + 0, /* bHubCntrCurrent */ + {}, /* Device removable */ + {} /* at most 7 ports! XXX */ + }, + { + 0x12, /* bLength */ + 1, /* bDescriptorType: UDESC_DEVICE */ + cpu_to_le16(0x0300), /* bcdUSB: v3.0 */ + 9, /* bDeviceClass: UDCLASS_HUB */ + 0, /* bDeviceSubClass: UDSUBCLASS_HUB */ + 3, /* bDeviceProtocol: UDPROTO_SSHUBSTT */ + 9, /* bMaxPacketSize: 512 bytes 2^9 */ + 0x0000, /* idVendor */ + 0x0000, /* idProduct */ + cpu_to_le16(0x0100), /* bcdDevice */ + 1, /* iManufacturer */ + 2, /* iProduct */ + 0, /* iSerialNumber */ + 1 /* bNumConfigurations: 1 */ + }, + { + 0x9, + 2, /* bDescriptorType: UDESC_CONFIG */ + cpu_to_le16(0x1f), /* includes SS endpoint descriptor */ + 1, /* bNumInterface */ + 1, /* bConfigurationValue */ + 0, /* iConfiguration */ + 0x40, /* bmAttributes: UC_SELF_POWER */ + 0 /* bMaxPower */ + }, + { + 0x9, /* bLength */ + 4, /* bDescriptorType: UDESC_INTERFACE */ + 0, /* bInterfaceNumber */ + 0, /* bAlternateSetting */ + 1, /* bNumEndpoints */ + 9, /* bInterfaceClass: UICLASS_HUB */ + 0, /* bInterfaceSubClass: UISUBCLASS_HUB */ + 0, /* bInterfaceProtocol: UIPROTO_HSHUBSTT */ + 0 /* iInterface */ + }, + { + 0x7, /* bLength */ + 5, /* bDescriptorType: UDESC_ENDPOINT */ + 0x81, /* bEndpointAddress: IN endpoint 1 */ + 3, /* bmAttributes: UE_INTERRUPT */ + 8, /* wMaxPacketSize */ + 255 /* bInterval */ + }, + { + 0x06, /* ss_bLength */ + 0x30, /* ss_bDescriptorType: SS EP Companion */ + 0x00, /* ss_bMaxBurst: allows 1 TX between ACKs */ + /* ss_bmAttributes: 1 packet per service interval */ + 0x00, + /* ss_wBytesPerInterval: 15 bits for max 15 ports */ + cpu_to_le16(0x02), + }, +}; + +static struct xhci_ctrl xhcic[CONFIG_USB_MAX_CONTROLLER_COUNT]; + +/** + * Waits for as per specified amount of time + * for the "result" to match with "done" + * + * @param ptr pointer to the register to be read + * @param mask mask for the value read + * @param done value to be campared with result + * @param usec time to wait till + * @return 0 if handshake is success else < 0 on failure + */ +static int handshake(uint32_t volatile *ptr, uint32_t mask, + uint32_t done, int usec) +{ + uint32_t result; + + do { + result = xhci_readl(ptr); + if (result == ~(uint32_t)0) + return -ENODEV; + result &= mask; + if (result == done) + return 0; + usec--; + udelay(1); + } while (usec > 0); + + return -ETIMEDOUT; +} + +/** + * Set the run bit and wait for the host to be running. + * + * @param hcor pointer to host controller operation registers + * @return status of the Handshake + */ +static int xhci_start(struct xhci_hcor *hcor) +{ + u32 temp; + int ret; + + printf("Starting the controller\n"); + temp = xhci_readl(&hcor->or_usbcmd); + temp |= (CMD_RUN); + xhci_writel(&hcor->or_usbcmd, temp); + + /* + * Wait for the HCHalted Status bit to be 0 to indicate the host is + * running. + */ + ret = handshake(&hcor->or_usbsts, STS_HALT, 0, XHCI_MAX_HALT_USEC); + if (ret) + debug("Host took too long to start, " + "waited %u microseconds.\n", + XHCI_MAX_HALT_USEC); + return ret; +} + +/** + * Resets the XHCI Controller + * + * @param hcor pointer to host controller operation registers + * @return -1 if XHCI Controller is halted else status of handshake + */ +int xhci_reset(struct xhci_hcor *hcor) +{ + u32 cmd; + u32 state; + int ret; + + /* Halting the Host first */ + debug("// Halt the HC\n"); + state = xhci_readl(&hcor->or_usbsts) & STS_HALT; + if (!state) { + cmd = xhci_readl(&hcor->or_usbcmd); + cmd &= ~CMD_RUN; + xhci_writel(&hcor->or_usbcmd, cmd); + } + + ret = handshake(&hcor->or_usbsts, + STS_HALT, STS_HALT, XHCI_MAX_HALT_USEC); + if (ret) { + printf("Host not halted after %u microseconds.\n", + XHCI_MAX_HALT_USEC); + return -1; + } + + debug("// Reset the HC\n"); + cmd = xhci_readl(&hcor->or_usbcmd); + cmd |= CMD_RESET; + xhci_writel(&hcor->or_usbcmd, cmd); + + ret = handshake(&hcor->or_usbcmd, CMD_RESET, 0, XHCI_MAX_RESET_USEC); + if (ret) + return ret; + + /* + * xHCI cannot write to any doorbells or operational registers other + * than status until the "Controller Not Ready" flag is cleared. + */ + return handshake(&hcor->or_usbsts, STS_CNR, 0, XHCI_MAX_RESET_USEC); +} + +/** + * Used for passing endpoint bitmasks between the core and HCDs. + * Find the index for an endpoint given its descriptor. + * Use the return value to right shift 1 for the bitmask. + * + * Index = (epnum * 2) + direction - 1, + * where direction = 0 for OUT, 1 for IN. + * For control endpoints, the IN index is used (OUT index is unused), so + * index = (epnum * 2) + direction - 1 = (epnum * 2) + 1 - 1 = (epnum * 2) + * + * @param desc USB enpdoint Descriptor + * @return index of the Endpoint + */ +static unsigned int xhci_get_ep_index(struct usb_endpoint_descriptor *desc) +{ + unsigned int index; + + if (usb_endpoint_xfer_control(desc)) { + index = (unsigned int)(usb_endpoint_num(desc) * 2); + } else { + index = (unsigned int)((usb_endpoint_num(desc) * 2) - + (usb_endpoint_dir_in(desc) ? 0 : 1)); + } + + return index; +} + +/** + * Issue a configure endpoint command or evaluate context command + * and wait for it to finish. + * + * @param udev pointer to the Device Data Structure + * @param ctx_change flag to indicate the Context has changed or NOT + * @return 0 on success, -1 on failure + */ +static int xhci_configure_endpoints(struct usb_device *udev, bool ctx_change) +{ + struct xhci_container_ctx *in_ctx; + struct xhci_virt_device *virt_dev; + struct xhci_ctrl *ctrl = udev->controller; + union xhci_trb *event; + + virt_dev = ctrl->devs[udev->slot_id]; + in_ctx = virt_dev->in_ctx; + + xhci_flush_cache((uint32_t)in_ctx->bytes, in_ctx->size); + xhci_queue_command(ctrl, in_ctx->bytes, udev->slot_id, 0, + ctx_change ? TRB_EVAL_CONTEXT : TRB_CONFIG_EP); + event = xhci_wait_for_event(ctrl, TRB_COMPLETION); + BUG_ON(TRB_TO_SLOT_ID(le32_to_cpu(event->event_cmd.flags)) + != udev->slot_id); + + switch (GET_COMP_CODE(le32_to_cpu(event->event_cmd.status))) { + case COMP_SUCCESS: + debug("Successful %s command\n", + ctx_change ? "Evaluate Context" : "Configure Endpoint"); + break; + default: + printf("ERROR: %s command returned completion code %d.\n", + ctx_change ? "Evaluate Context" : "Configure Endpoint", + GET_COMP_CODE(le32_to_cpu(event->event_cmd.status))); + return -1; + } + + xhci_acknowledge_event(ctrl); + + return 0; +} + +/** + * Configure the endpoint, programming the device contexts. + * + * @param udev pointer to the USB device structure + * @return returns the status of the xhci_configure_endpoints + */ +static int xhci_set_configuration(struct usb_device *udev) +{ + struct xhci_container_ctx *in_ctx; + struct xhci_container_ctx *out_ctx; + struct xhci_input_control_ctx *ctrl_ctx; + struct xhci_slot_ctx *slot_ctx; + struct xhci_ep_ctx *ep_ctx[MAX_EP_CTX_NUM]; + int cur_ep; + int max_ep_flag = 0; + int ep_index; + unsigned int dir; + unsigned int ep_type; + struct xhci_ctrl *ctrl = udev->controller; + int num_of_ep; + int ep_flag = 0; + u64 trb_64 = 0; + int slot_id = udev->slot_id; + struct xhci_virt_device *virt_dev = ctrl->devs[slot_id]; + struct usb_interface *ifdesc; + + out_ctx = virt_dev->out_ctx; + in_ctx = virt_dev->in_ctx; + + num_of_ep = udev->config.if_desc[0].no_of_ep; + ifdesc = &udev->config.if_desc[0]; + + ctrl_ctx = xhci_get_input_control_ctx(in_ctx); + /* Zero the input context control */ + ctrl_ctx->add_flags = 0; + ctrl_ctx->drop_flags = 0; + + /* EP_FLAG gives values 1 & 4 for EP1OUT and EP2IN */ + for (cur_ep = 0; cur_ep < num_of_ep; cur_ep++) { + ep_flag = xhci_get_ep_index(&ifdesc->ep_desc[cur_ep]); + ctrl_ctx->add_flags |= cpu_to_le32(1 << (ep_flag + 1)); + if (max_ep_flag < ep_flag) + max_ep_flag = ep_flag; + } + + xhci_inval_cache((uint32_t)out_ctx->bytes, out_ctx->size); + + /* slot context */ + xhci_slot_copy(ctrl, in_ctx, out_ctx); + slot_ctx = xhci_get_slot_ctx(ctrl, in_ctx); + slot_ctx->dev_info &= ~(LAST_CTX_MASK); + slot_ctx->dev_info |= cpu_to_le32(LAST_CTX(max_ep_flag + 1) | 0); + + xhci_endpoint_copy(ctrl, in_ctx, out_ctx, 0); + + /* filling up ep contexts */ + for (cur_ep = 0; cur_ep < num_of_ep; cur_ep++) { + struct usb_endpoint_descriptor *endpt_desc = NULL; + + endpt_desc = &ifdesc->ep_desc[cur_ep]; + trb_64 = 0; + + ep_index = xhci_get_ep_index(endpt_desc); + ep_ctx[ep_index] = xhci_get_ep_ctx(ctrl, in_ctx, ep_index); + + /* Allocate the ep rings */ + virt_dev->eps[ep_index].ring = xhci_ring_alloc(1, true); + if (!virt_dev->eps[ep_index].ring) + return -1; + + /*NOTE: ep_desc[0] actually represents EP1 and so on */ + dir = (((endpt_desc->bEndpointAddress) & (0x80)) >> 7); + ep_type = (((endpt_desc->bmAttributes) & (0x3)) | (dir << 2)); + ep_ctx[ep_index]->ep_info2 = + cpu_to_le32(ep_type << EP_TYPE_SHIFT); + ep_ctx[ep_index]->ep_info2 |= + cpu_to_le32(MAX_PACKET + (get_unaligned(&endpt_desc->wMaxPacketSize))); + + ep_ctx[ep_index]->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[ep_index].ring->enqueue; + ep_ctx[ep_index]->deq = cpu_to_le64(trb_64 | + virt_dev->eps[ep_index].ring->cycle_state); + } + + return xhci_configure_endpoints(udev, false); +} + +/** + * Issue an Address Device command (which will issue a SetAddress request to + * the device). + * + * @param udev pointer to the Device Data Structure + * @return 0 if successful else error code on failure + */ +static int xhci_address_device(struct usb_device *udev) +{ + int ret = 0; + struct xhci_ctrl *ctrl = udev->controller; + struct xhci_slot_ctx *slot_ctx; + struct xhci_input_control_ctx *ctrl_ctx; + struct xhci_virt_device *virt_dev; + int slot_id = udev->slot_id; + union xhci_trb *event; + + virt_dev = ctrl->devs[slot_id]; + + /* + * This is the first Set Address since device plug-in + * so setting up the slot context. + */ + debug("Setting up addressable devices\n"); + xhci_setup_addressable_virt_dev(udev); + + ctrl_ctx = xhci_get_input_control_ctx(virt_dev->in_ctx); + ctrl_ctx->add_flags = cpu_to_le32(SLOT_FLAG | EP0_FLAG); + ctrl_ctx->drop_flags = 0; + + xhci_queue_command(ctrl, (void *)ctrl_ctx, slot_id, 0, TRB_ADDR_DEV); + event = xhci_wait_for_event(ctrl, TRB_COMPLETION); + BUG_ON(TRB_TO_SLOT_ID(le32_to_cpu(event->event_cmd.flags)) != slot_id); + + switch (GET_COMP_CODE(le32_to_cpu(event->event_cmd.status))) { + case COMP_CTX_STATE: + case COMP_EBADSLT: + printf("Setup ERROR: address device command for slot %d.\n", + slot_id); + ret = -EINVAL; + break; + case COMP_TX_ERR: + printf("Device not responding to set address.\n"); + ret = -EPROTO; + break; + case COMP_DEV_ERR: + printf("ERROR: Incompatible device" + "for address device command.\n"); + ret = -ENODEV; + break; + case COMP_SUCCESS: + debug("Successful Address Device command\n"); + udev->status = 0; + break; + default: + printf("ERROR: unexpected command completion code 0x%x.\n", + GET_COMP_CODE(le32_to_cpu(event->event_cmd.status))); + ret = -EINVAL; + break; + } + + xhci_acknowledge_event(ctrl); + + if (ret < 0) + /* + * TODO: Unsuccessful Address Device command shall leave the + * slot in default state. So, issue Disable Slot command now. + */ + return ret; + + xhci_inval_cache((uint32_t)virt_dev->out_ctx->bytes, + virt_dev->out_ctx->size); + slot_ctx = xhci_get_slot_ctx(ctrl, virt_dev->out_ctx); + + debug("xHC internal address is: %d\n", + le32_to_cpu(slot_ctx->dev_state) & DEV_ADDR_MASK); + + return 0; +} + +/** + * Issue Enable slot command to the controller to allocate + * device slot and assign the slot id. It fails if the xHC + * ran out of device slots, the Enable Slot command timed out, + * or allocating memory failed. + * + * @param udev pointer to the Device Data Structure + * @return Returns 0 on succes else return -1 on failure + */ +int usb_alloc_device(struct usb_device *udev) +{ + union xhci_trb *event; + struct xhci_ctrl *ctrl = udev->controller; + + /* + * Root hub will be first device to be initailized. + * If this device is root-hub, don't do any xHC related + * stuff. + */ + if (ctrl->rootdev == 0) { + udev->speed = USB_SPEED_SUPER; + return 0; + } + + xhci_queue_command(ctrl, NULL, 0, 0, TRB_ENABLE_SLOT); + event = xhci_wait_for_event(ctrl, TRB_COMPLETION); + BUG_ON(GET_COMP_CODE(le32_to_cpu(event->event_cmd.status)) + != COMP_SUCCESS); + + udev->slot_id = TRB_TO_SLOT_ID(le32_to_cpu(event->event_cmd.flags)); + + xhci_acknowledge_event(ctrl); + + if (xhci_alloc_virt_device(udev) < 0) { + /* + * TODO: Unsuccessful Address Device command shall leave + * the slot in default. So, issue Disable Slot command now. + */ + printf("Could not allocate xHCI USB device data structures\n"); + return -1; + } + + return 0; +} + +/* + * Full speed devices may have a max packet size greater than 8 bytes, but the + * USB core doesn't know that until it reads the first 8 bytes of the + * descriptor. If the usb_device's max packet size changes after that point, + * we need to issue an evaluate context command and wait on it. + * + * @param udev pointer to the Device Data Structure + * @return returns the status of the xhci_configure_endpoints + */ +int xhci_check_maxpacket(struct usb_device *udev) +{ + struct xhci_ctrl *ctrl = udev->controller; + unsigned int slot_id = udev->slot_id; + int ep_index = 0; /* control endpoint */ + struct xhci_container_ctx *in_ctx; + struct xhci_container_ctx *out_ctx; + struct xhci_input_control_ctx *ctrl_ctx; + struct xhci_ep_ctx *ep_ctx; + int max_packet_size; + int hw_max_packet_size; + int ret = 0; + struct usb_interface *ifdesc; + + ifdesc = &udev->config.if_desc[0]; + + out_ctx = ctrl->devs[slot_id]->out_ctx; + xhci_inval_cache((uint32_t)out_ctx->bytes, out_ctx->size); + + ep_ctx = xhci_get_ep_ctx(ctrl, out_ctx, ep_index); + hw_max_packet_size = MAX_PACKET_DECODED(le32_to_cpu(ep_ctx->ep_info2)); + max_packet_size = usb_endpoint_maxp(&ifdesc->ep_desc[0]); + if (hw_max_packet_size != max_packet_size) { + debug("Max Packet Size for ep 0 changed.\n"); + debug("Max packet size in usb_device = %d\n", max_packet_size); + debug("Max packet size in xHCI HW = %d\n", hw_max_packet_size); + debug("Issuing evaluate context command.\n"); + + /* Set up the modified control endpoint 0 */ + xhci_endpoint_copy(ctrl, ctrl->devs[slot_id]->in_ctx, + ctrl->devs[slot_id]->out_ctx, ep_index); + in_ctx = ctrl->devs[slot_id]->in_ctx; + ep_ctx = xhci_get_ep_ctx(ctrl, in_ctx, ep_index); + ep_ctx->ep_info2 &= cpu_to_le32(~MAX_PACKET_MASK); + ep_ctx->ep_info2 |= cpu_to_le32(MAX_PACKET(max_packet_size)); + + /* + * Set up the input context flags for the command + * FIXME: This won't work if a non-default control endpoint + * changes max packet sizes. + */ + ctrl_ctx = xhci_get_input_control_ctx(in_ctx); + ctrl_ctx->add_flags = cpu_to_le32(EP0_FLAG); + ctrl_ctx->drop_flags = 0; + + ret = xhci_configure_endpoints(udev, true); + } + return ret; +} + +/** + * Clears the Change bits of the Port Status Register + * + * @param wValue request value + * @param wIndex request index + * @param addr address of posrt status register + * @param port_status state of port status register + * @return none + */ +static void xhci_clear_port_change_bit(u16 wValue, + u16 wIndex, volatile uint32_t *addr, u32 port_status) +{ + char *port_change_bit; + u32 status; + + switch (wValue) { + case USB_PORT_FEAT_C_RESET: + status = PORT_RC; + port_change_bit = "reset"; + break; + case USB_PORT_FEAT_C_CONNECTION: + status = PORT_CSC; + port_change_bit = "connect"; + break; + case USB_PORT_FEAT_C_OVER_CURRENT: + status = PORT_OCC; + port_change_bit = "over-current"; + break; + case USB_PORT_FEAT_C_ENABLE: + status = PORT_PEC; + port_change_bit = "enable/disable"; + break; + case USB_PORT_FEAT_C_SUSPEND: + status = PORT_PLC; + port_change_bit = "suspend/resume"; + break; + default: + /* Should never happen */ + return; + } + + /* Change bits are all write 1 to clear */ + xhci_writel(addr, port_status | status); + + port_status = xhci_readl(addr); + debug("clear port %s change, actual port %d status = 0x%x\n", + port_change_bit, wIndex, port_status); +} + +/** + * Save Read Only (RO) bits and save read/write bits where + * writing a 0 clears the bit and writing a 1 sets the bit (RWS). + * For all other types (RW1S, RW1CS, RW, and RZ), writing a '0' has no effect. + * + * @param state state of the Port Status and Control Regsiter + * @return a value that would result in the port being in the + * same state, if the value was written to the port + * status control register. + */ +static u32 xhci_port_state_to_neutral(u32 state) +{ + /* Save read-only status and port state */ + return (state & XHCI_PORT_RO) | (state & XHCI_PORT_RWS); +} + +/** + * Submits the Requests to the XHCI Host Controller + * + * @param udev pointer to the USB device structure + * @param pipe contains the DIR_IN or OUT , devnum + * @param buffer buffer to be read/written based on the request + * @return returns 0 if successful else -1 on failure + */ +static int xhci_submit_root(struct usb_device *udev, unsigned long pipe, + void *buffer, struct devrequest *req) +{ + uint8_t tmpbuf[4]; + u16 typeReq; + void *srcptr = NULL; + int len, srclen; + uint32_t reg; + volatile uint32_t *status_reg; + struct xhci_ctrl *ctrl = udev->controller; + struct xhci_hcor *hcor = ctrl->hcor; + + if (((req->requesttype & USB_RT_PORT) && + le16_to_cpu(req->index)) > CONFIG_SYS_USB_XHCI_MAX_ROOT_PORTS) { + printf("The request port(%d) is not configured\n", + le16_to_cpu(req->index) - 1); + return -1; + } + + status_reg = (volatile uint32_t *) + (&hcor->PortRegs[le16_to_cpu(req->index) - 1].or_portsc); + srclen = 0; + + typeReq = req->request | req->requesttype << 8; + + switch (typeReq) { + case DeviceRequest | USB_REQ_GET_DESCRIPTOR: + switch (le16_to_cpu(req->value) >> 8) { + case USB_DT_DEVICE: + debug("USB_DT_DEVICE request\n"); + srcptr = &descriptor.device; + srclen = 0x12; + break; + case USB_DT_CONFIG: + debug("USB_DT_CONFIG config\n"); + srcptr = &descriptor.config; + srclen = 0x19; + break; + case USB_DT_STRING: + debug("USB_DT_STRING config\n"); + switch (le16_to_cpu(req->value) & 0xff) { + case 0: /* Language */ + srcptr = "\4\3\11\4"; + srclen = 4; + break; + case 1: /* Vendor String */ + srcptr = "\16\3u\0-\0b\0o\0o\0t\0"; + srclen = 14; + break; + case 2: /* Product Name */ + srcptr = "\52\3X\0H\0C\0I\0 " + "\0H\0o\0s\0t\0 " + "\0C\0o\0n\0t\0r\0o\0l\0l\0e\0r\0"; + srclen = 42; + break; + default: + printf("unknown value DT_STRING %x\n", + le16_to_cpu(req->value)); + goto unknown; + } + break; + default: + printf("unknown value %x\n", le16_to_cpu(req->value)); + goto unknown; + } + break; + case USB_REQ_GET_DESCRIPTOR | ((USB_DIR_IN | USB_RT_HUB) << 8): + switch (le16_to_cpu(req->value) >> 8) { + case USB_DT_HUB: + debug("USB_DT_HUB config\n"); + srcptr = &descriptor.hub; + srclen = 0x8; + break; + default: + printf("unknown value %x\n", le16_to_cpu(req->value)); + goto unknown; + } + break; + case USB_REQ_SET_ADDRESS | (USB_RECIP_DEVICE << 8): + debug("USB_REQ_SET_ADDRESS\n"); + ctrl->rootdev = le16_to_cpu(req->value); + break; + case DeviceOutRequest | USB_REQ_SET_CONFIGURATION: + /* Do nothing */ + break; + case USB_REQ_GET_STATUS | ((USB_DIR_IN | USB_RT_HUB) << 8): + tmpbuf[0] = 1; /* USB_STATUS_SELFPOWERED */ + tmpbuf[1] = 0; + srcptr = tmpbuf; + srclen = 2; + break; + case USB_REQ_GET_STATUS | ((USB_RT_PORT | USB_DIR_IN) << 8): + memset(tmpbuf, 0, 4); + reg = xhci_readl(status_reg); + if (reg & PORT_CONNECT) { + tmpbuf[0] |= USB_PORT_STAT_CONNECTION; + switch (reg & DEV_SPEED_MASK) { + case XDEV_FS: + debug("SPEED = FULLSPEED\n"); + break; + case XDEV_LS: + debug("SPEED = LOWSPEED\n"); + tmpbuf[1] |= USB_PORT_STAT_LOW_SPEED >> 8; + break; + case XDEV_HS: + debug("SPEED = HIGHSPEED\n"); + tmpbuf[1] |= USB_PORT_STAT_HIGH_SPEED >> 8; + break; + case XDEV_SS: + debug("SPEED = SUPERSPEED\n"); + tmpbuf[1] |= USB_PORT_STAT_SUPER_SPEED >> 8; + break; + } + } + if (reg & PORT_PE) + tmpbuf[0] |= USB_PORT_STAT_ENABLE; + if ((reg & PORT_PLS_MASK) == XDEV_U3) + tmpbuf[0] |= USB_PORT_STAT_SUSPEND; + if (reg & PORT_OC) + tmpbuf[0] |= USB_PORT_STAT_OVERCURRENT; + if (reg & PORT_RESET) + tmpbuf[0] |= USB_PORT_STAT_RESET; + if (reg & PORT_POWER) + /* + * XXX: This Port power bit (for USB 3.0 hub) + * we are faking in USB 2.0 hub port status; + * since there's a change in bit positions in + * two: + * USB 2.0 port status PP is at position[8] + * USB 3.0 port status PP is at position[9] + * So, we are still keeping it at position [8] + */ + tmpbuf[1] |= USB_PORT_STAT_POWER >> 8; + if (reg & PORT_CSC) + tmpbuf[2] |= USB_PORT_STAT_C_CONNECTION; + if (reg & PORT_PEC) + tmpbuf[2] |= USB_PORT_STAT_C_ENABLE; + if (reg & PORT_OCC) + tmpbuf[2] |= USB_PORT_STAT_C_OVERCURRENT; + if (reg & PORT_RC) + tmpbuf[2] |= USB_PORT_STAT_C_RESET; + + srcptr = tmpbuf; + srclen = 4; + break; + case USB_REQ_SET_FEATURE | ((USB_DIR_OUT | USB_RT_PORT) << 8): + reg = xhci_readl(status_reg); + reg = xhci_port_state_to_neutral(reg); + switch (le16_to_cpu(req->value)) { + case USB_PORT_FEAT_ENABLE: + reg |= PORT_PE; + xhci_writel(status_reg, reg); + break; + case USB_PORT_FEAT_POWER: + reg |= PORT_POWER; + xhci_writel(status_reg, reg); + break; + case USB_PORT_FEAT_RESET: + reg |= PORT_RESET; + xhci_writel(status_reg, reg); + break; + default: + printf("unknown feature %x\n", le16_to_cpu(req->value)); + goto unknown; + } + break; + case USB_REQ_CLEAR_FEATURE | ((USB_DIR_OUT | USB_RT_PORT) << 8): + reg = xhci_readl(status_reg); + reg = xhci_port_state_to_neutral(reg); + switch (le16_to_cpu(req->value)) { + case USB_PORT_FEAT_ENABLE: + reg &= ~PORT_PE; + break; + case USB_PORT_FEAT_POWER: + reg &= ~PORT_POWER; + break; + case USB_PORT_FEAT_C_RESET: + case USB_PORT_FEAT_C_CONNECTION: + case USB_PORT_FEAT_C_OVER_CURRENT: + case USB_PORT_FEAT_C_ENABLE: + xhci_clear_port_change_bit((le16_to_cpu(req->value)), + le16_to_cpu(req->index), + status_reg, reg); + break; + default: + printf("unknown feature %x\n", le16_to_cpu(req->value)); + goto unknown; + } + xhci_writel(status_reg, reg); + break; + default: + printf("Unknown request\n"); + goto unknown; + } + + debug("scrlen = %d\n req->length = %d\n", + srclen, le16_to_cpu(req->length)); + + len = min(srclen, le16_to_cpu(req->length)); + + if (srcptr != NULL && len > 0) + memcpy(buffer, srcptr, len); + else + debug("Len is 0\n"); + + udev->act_len = len; + udev->status = 0; + + return 0; + +unknown: + udev->act_len = 0; + udev->status = USB_ST_STALLED; + + return -1; +} + +/** + * Submits the INT request to XHCI Host cotroller + * + * @param udev pointer to the USB device + * @param pipe contains the DIR_IN or OUT , devnum + * @param buffer buffer to be read/written based on the request + * @param length length of the buffer + * @param interval interval of the interrupt + * @return 0 + */ +int +submit_int_msg(struct usb_device *udev, unsigned long pipe, void *buffer, + int length, int interval) +{ + /* + * TODO: Not addressing any interrupt type transfer requests + * Add support for it later. + */ + return -1; +} + +/** + * submit the BULK type of request to the USB Device + * + * @param udev pointer to the USB device + * @param pipe contains the DIR_IN or OUT , devnum + * @param buffer buffer to be read/written based on the request + * @param length length of the buffer + * @return returns 0 if successful else -1 on failure + */ +int +submit_bulk_msg(struct usb_device *udev, unsigned long pipe, void *buffer, + int length) +{ + if (usb_pipetype(pipe) != PIPE_BULK) { + printf("non-bulk pipe (type=%lu)", usb_pipetype(pipe)); + return -1; + } + + return xhci_bulk_tx(udev, pipe, length, buffer); +} + +/** + * submit the control type of request to the Root hub/Device based on the devnum + * + * @param udev pointer to the USB device + * @param pipe contains the DIR_IN or OUT , devnum + * @param buffer buffer to be read/written based on the request + * @param length length of the buffer + * @param setup Request type + * @return returns 0 if successful else -1 on failure + */ +int +submit_control_msg(struct usb_device *udev, unsigned long pipe, void *buffer, + int length, struct devrequest *setup) +{ + struct xhci_ctrl *ctrl = udev->controller; + int ret = 0; + + if (usb_pipetype(pipe) != PIPE_CONTROL) { + printf("non-control pipe (type=%lu)", usb_pipetype(pipe)); + return -1; + } + + if (usb_pipedevice(pipe) == ctrl->rootdev) + return xhci_submit_root(udev, pipe, buffer, setup); + + if (setup->request == USB_REQ_SET_ADDRESS) + return xhci_address_device(udev); + + if (setup->request == USB_REQ_SET_CONFIGURATION) { + ret = xhci_set_configuration(udev); + if (ret) { + printf("Failed to configure xHC endpoint\n"); + return ret; + } + } + + return xhci_ctrl_tx(udev, pipe, setup, length, buffer); +} + +/** + * Intialises the XHCI host controller + * and allocates the necessary data structures + * + * @param index index to the host controller data structure + * @return pointer to the intialised controller + */ +int usb_lowlevel_init(int index, void **controller) +{ + uint32_t val; + uint32_t val2; + uint32_t reg; + struct xhci_hccr *hccr; + struct xhci_hcor *hcor; + struct xhci_ctrl *ctrl; + + if (xhci_hcd_init(index, &hccr, (struct xhci_hcor **)&hcor) != 0) + return -ENODEV; + + if (xhci_reset(hcor) != 0) + return -ENODEV; + + ctrl = &xhcic[index]; + + ctrl->hccr = hccr; + ctrl->hcor = hcor; + + /* + * Program the Number of Device Slots Enabled field in the CONFIG + * register with the max value of slots the HC can handle. + */ + val = (xhci_readl(&hccr->cr_hcsparams1) & HCS_SLOTS_MASK); + val2 = xhci_readl(&hcor->or_config); + val |= (val2 & ~HCS_SLOTS_MASK); + xhci_writel(&hcor->or_config, val); + + /* initializing xhci data structures */ + if (xhci_mem_init(ctrl, hccr, hcor) < 0) + return -ENOMEM; + + reg = xhci_readl(&hccr->cr_hcsparams1); + descriptor.hub.bNbrPorts = ((reg & HCS_MAX_PORTS_MASK) >> + HCS_MAX_PORTS_SHIFT); + printf("Register %x NbrPorts %d\n", reg, descriptor.hub.bNbrPorts); + + /* Port Indicators */ + reg = xhci_readl(&hccr->cr_hccparams); + if (HCS_INDICATOR(reg)) + put_unaligned(get_unaligned(&descriptor.hub.wHubCharacteristics) + | 0x80, &descriptor.hub.wHubCharacteristics); + + /* Port Power Control */ + if (HCC_PPC(reg)) + put_unaligned(get_unaligned(&descriptor.hub.wHubCharacteristics) + | 0x01, &descriptor.hub.wHubCharacteristics); + + if (xhci_start(hcor)) { + xhci_reset(hcor); + return -ENODEV; + } + + /* Zero'ing IRQ control register and IRQ pending register */ + xhci_writel(&ctrl->ir_set->irq_control, 0x0); + xhci_writel(&ctrl->ir_set->irq_pending, 0x0); + + reg = HC_VERSION(xhci_readl(&hccr->cr_capbase)); + printf("USB XHCI %x.%02x\n", reg >> 8, reg & 0xff); + + *controller = &xhcic[index]; + + return 0; +} + +/** + * Stops the XHCI host controller + * and cleans up all the related data structures + * + * @param index index to the host controller data structure + * @return none + */ +int usb_lowlevel_stop(int index) +{ + struct xhci_ctrl *ctrl = (xhcic + index); + u32 temp; + + xhci_reset(ctrl->hcor); + + debug("// Disabling event ring interrupts\n"); + temp = xhci_readl(&ctrl->hcor->or_usbsts); + xhci_writel(&ctrl->hcor->or_usbsts, temp & ~STS_EINT); + temp = xhci_readl(&ctrl->ir_set->irq_pending); + xhci_writel(&ctrl->ir_set->irq_pending, ER_IRQ_DISABLE(temp)); + + xhci_hcd_stop(index); + + xhci_cleanup(ctrl); + + return 0; +} diff --git a/drivers/usb/host/xhci.h b/drivers/usb/host/xhci.h new file mode 100644 index 0000000..467afe0 --- /dev/null +++ b/drivers/usb/host/xhci.h @@ -0,0 +1,1280 @@ +/* + * USB HOST XHCI Controller + * + * Copyright (C) 2013 Samsung Electronics Co.Ltd + * Vivek Gautam gautam.vivek@samsung.com + * Vikas Sajjan vikas.sajjan@samsung.com + * + * Based on xHCI host controller driver in linux-kernel + * by Sarah Sharp. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of + * the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, + * MA 02110-1301 USA + */ + +#ifndef HOST_XHCI_H_ +#define HOST_XHCI_H_ + +#include <asm/cache.h> +#include <linux/list.h> + +/* (shifted) direction/type/recipient from the USB 2.0 spec, table 9.2 */ +#define DeviceRequest \ + ((USB_DIR_IN | USB_TYPE_STANDARD | USB_RECIP_DEVICE) << 8) + +#define DeviceOutRequest \ + ((USB_DIR_OUT | USB_TYPE_STANDARD | USB_RECIP_DEVICE) << 8) + +#define InterfaceRequest \ + ((USB_DIR_IN | USB_TYPE_STANDARD | USB_RECIP_INTERFACE) << 8) + +#define EndpointRequest \ + ((USB_DIR_IN | USB_TYPE_STANDARD | USB_RECIP_INTERFACE) << 8) + +#define EndpointOutRequest \ + ((USB_DIR_OUT | USB_TYPE_STANDARD | USB_RECIP_INTERFACE) << 8) + +#define upper_32_bits(n) (u32)(((n) >> 32)) +#define lower_32_bits(n) (u32)(n) + +#define MAX_EP_CTX_NUM 31 +#define XHCI_ALIGNMENT 64 +/* Generic timeout for XHCI events */ +#define XHCI_TIMEOUT 5000 +/* Max number of USB devices for any host controller - limit in section 6.1 */ +#define MAX_HC_SLOTS 256 +/* Section 5.3.3 - MaxPorts */ +#define MAX_HC_PORTS 127 + +/* Up to 16 ms to halt an HC */ +#define XHCI_MAX_HALT_USEC (16*1000) + +#define XHCI_MAX_RESET_USEC (250*1000) + +/* + * These bits are Read Only (RO) and should be saved and written to the + * registers: 0, 3, 10:13, 30 + * connect status, over-current status, port speed, and device removable. + * connect status and port speed are also sticky - meaning they're in + * the AUX well and they aren't changed by a hot, warm, or cold reset. + */ +#define XHCI_PORT_RO ((1 << 0) | (1 << 3) | (0xf << 10) | (1 << 30)) +/* + * These bits are RW; writing a 0 clears the bit, writing a 1 sets the bit: + * bits 5:8, 9, 14:15, 25:27 + * link state, port power, port indicator state, "wake on" enable state + */ +#define XHCI_PORT_RWS ((0xf << 5) | (1 << 9) | (0x3 << 14) | (0x7 << 25)) +/* + * These bits are RW; writing a 1 sets the bit, writing a 0 has no effect: + * bit 4 (port reset) + */ +#define XHCI_PORT_RW1S ((1 << 4)) +/* + * These bits are RW; writing a 1 clears the bit, writing a 0 has no effect: + * bits 1, 17, 18, 19, 20, 21, 22, 23 + * port enable/disable, and + * change bits: connect, PED, + * warm port reset changed (reserved zero for USB 2.0 ports), + * over-current, reset, link state, and L1 change + */ +#define XHCI_PORT_RW1CS ((1 << 1) | (0x7f << 17)) +/* + * Bit 16 is RW, and writing a '1' to it causes the link state control to be + * latched in + */ +#define XHCI_PORT_RW ((1 << 16)) +/* + * These bits are Reserved Zero (RsvdZ) and zero should be written to them: + * bits 2, 24, 28:31 + */ +#define XHCI_PORT_RZ ((1 << 2) | (1 << 24) | (0xf << 28)) + +/* + * XHCI Register Space. + */ +struct xhci_hccr { + uint32_t cr_capbase; + uint32_t cr_hcsparams1; + uint32_t cr_hcsparams2; + uint32_t cr_hcsparams3; + uint32_t cr_hccparams; + uint32_t cr_dboff; + uint32_t cr_rtsoff; + +/* hc_capbase bitmasks */ +/* bits 7:0 - how long is the Capabilities register */ +#define HC_LENGTH(p) XHCI_HC_LENGTH(p) +/* bits 31:16 */ +#define HC_VERSION(p) (((p) >> 16) & 0xffff) + +/* HCSPARAMS1 - hcs_params1 - bitmasks */ +/* bits 0:7, Max Device Slots */ +#define HCS_MAX_SLOTS(p) (((p) >> 0) & 0xff) +#define HCS_SLOTS_MASK 0xff +/* bits 8:18, Max Interrupters */ +#define HCS_MAX_INTRS(p) (((p) >> 8) & 0x7ff) +/* bits 24:31, Max Ports - max value is 0x7F = 127 ports */ +#define HCS_MAX_PORTS_SHIFT 24 +#define HCS_MAX_PORTS_MASK (0x7f << HCS_MAX_PORTS_SHIFT) +#define HCS_MAX_PORTS(p) (((p) >> 24) & 0x7f) + +/* HCSPARAMS2 - hcs_params2 - bitmasks */ +/* bits 0:3, frames or uframes that SW needs to queue transactions + * ahead of the HW to meet periodic deadlines */ +#define HCS_IST(p) (((p) >> 0) & 0xf) +/* bits 4:7, max number of Event Ring segments */ +#define HCS_ERST_MAX(p) (((p) >> 4) & 0xf) +/* bit 26 Scratchpad restore - for save/restore HW state - not used yet */ +/* bits 27:31 number of Scratchpad buffers SW must allocate for the HW */ +#define HCS_MAX_SCRATCHPAD(p) (((p) >> 27) & 0x1f) + +/* HCSPARAMS3 - hcs_params3 - bitmasks */ +/* bits 0:7, Max U1 to U0 latency for the roothub ports */ +#define HCS_U1_LATENCY(p) (((p) >> 0) & 0xff) +/* bits 16:31, Max U2 to U0 latency for the roothub ports */ +#define HCS_U2_LATENCY(p) (((p) >> 16) & 0xffff) + +/* HCCPARAMS - hcc_params - bitmasks */ +/* true: HC can use 64-bit address pointers */ +#define HCC_64BIT_ADDR(p) ((p) & (1 << 0)) +/* true: HC can do bandwidth negotiation */ +#define HCC_BANDWIDTH_NEG(p) ((p) & (1 << 1)) +/* true: HC uses 64-byte Device Context structures + * FIXME 64-byte context structures aren't supported yet. + */ +#define HCC_64BYTE_CONTEXT(p) ((p) & (1 << 2)) +/* true: HC has port power switches */ +#define HCC_PPC(p) ((p) & (1 << 3)) +/* true: HC has port indicators */ +#define HCS_INDICATOR(p) ((p) & (1 << 4)) +/* true: HC has Light HC Reset Capability */ +#define HCC_LIGHT_RESET(p) ((p) & (1 << 5)) +/* true: HC supports latency tolerance messaging */ +#define HCC_LTC(p) ((p) & (1 << 6)) +/* true: no secondary Stream ID Support */ +#define HCC_NSS(p) ((p) & (1 << 7)) +/* Max size for Primary Stream Arrays - 2^(n+1), where n is bits 12:15 */ +#define HCC_MAX_PSA(p) (1 << ((((p) >> 12) & 0xf) + 1)) +/* Extended Capabilities pointer from PCI base - section 5.3.6 */ +#define HCC_EXT_CAPS(p) XHCI_HCC_EXT_CAPS(p) + +/* db_off bitmask - bits 0:1 reserved */ +#define DBOFF_MASK (~0x3) + +/* run_regs_off bitmask - bits 0:4 reserved */ +#define RTSOFF_MASK (~0x1f) + +}; + +struct xhci_hcor_portRegss { + volatile uint32_t or_portsc; + volatile uint32_t or_portpmsc; + volatile uint32_t or_portli; + volatile uint32_t reserved_3; +}; + +struct xhci_hcor { + volatile uint32_t or_usbcmd; + volatile uint32_t or_usbsts; + volatile uint32_t or_pagesize; + volatile uint32_t reserved_0[2]; + volatile uint32_t or_dnctrl; + volatile uint64_t or_crcr; + volatile uint32_t reserved_1[4]; + volatile uint64_t or_dcbaap; + volatile uint32_t or_config; + volatile uint32_t reserved_2[241]; + struct xhci_hcor_portRegss PortRegs[CONFIG_SYS_USB_XHCI_MAX_ROOT_PORTS]; + + uint32_t reserved_4[CONFIG_SYS_USB_XHCI_MAX_ROOT_PORTS * 254]; +}; + +/* USBCMD - USB command - command bitmasks */ +/* start/stop HC execution - do not write unless HC is halted*/ +#define CMD_RUN XHCI_CMD_RUN +/* Reset HC - resets internal HC state machine and all registers (except + * PCI config regs). HC does NOT drive a USB reset on the downstream ports. + * The xHCI driver must reinitialize the xHC after setting this bit. + */ +#define CMD_RESET (1 << 1) +/* Event Interrupt Enable - a '1' allows interrupts from the host controller */ +#define CMD_EIE XHCI_CMD_EIE +/* Host System Error Interrupt Enable - get out-of-band signal for HC errors */ +#define CMD_HSEIE XHCI_CMD_HSEIE +/* bits 4:6 are reserved (and should be preserved on writes). */ +/* light reset (port status stays unchanged) - reset completed when this is 0 */ +#define CMD_LRESET (1 << 7) +/* host controller save/restore state. */ +#define CMD_CSS (1 << 8) +#define CMD_CRS (1 << 9) +/* Enable Wrap Event - '1' means xHC generates an event when MFINDEX wraps. */ +#define CMD_EWE XHCI_CMD_EWE +/* MFINDEX power management - '1' means xHC can stop MFINDEX counter if all root + * hubs are in U3 (selective suspend), disconnect, disabled, or powered-off. + * '0' means the xHC can power it off if all ports are in the disconnect, + * disabled, or powered-off state. + */ +#define CMD_PM_INDEX (1 << 11) +/* bits 12:31 are reserved (and should be preserved on writes). */ + +/* USBSTS - USB status - status bitmasks */ +/* HC not running - set to 1 when run/stop bit is cleared. */ +#define STS_HALT XHCI_STS_HALT +/* serious error, e.g. PCI parity error. The HC will clear the run/stop bit. */ +#define STS_FATAL (1 << 2) +/* event interrupt - clear this prior to clearing any IP flags in IR set*/ +#define STS_EINT (1 << 3) +/* port change detect */ +#define STS_PORT (1 << 4) +/* bits 5:7 reserved and zeroed */ +/* save state status - '1' means xHC is saving state */ +#define STS_SAVE (1 << 8) +/* restore state status - '1' means xHC is restoring state */ +#define STS_RESTORE (1 << 9) +/* true: save or restore error */ +#define STS_SRE (1 << 10) +/* true: Controller Not Ready to accept doorbell or op reg writes after reset */ +#define STS_CNR XHCI_STS_CNR +/* true: internal Host Controller Error - SW needs to reset and reinitialize */ +#define STS_HCE (1 << 12) +/* bits 13:31 reserved and should be preserved */ + +/* + * DNCTRL - Device Notification Control Register - dev_notification bitmasks + * Generate a device notification event when the HC sees a transaction with a + * notification type that matches a bit set in this bit field. + */ +#define DEV_NOTE_MASK (0xffff) +#define ENABLE_DEV_NOTE(x) (1 << (x)) +/* Most of the device notification types should only be used for debug. + * SW does need to pay attention to function wake notifications. + */ +#define DEV_NOTE_FWAKE ENABLE_DEV_NOTE(1) + +/* CRCR - Command Ring Control Register - cmd_ring bitmasks */ +/* bit 0 is the command ring cycle state */ +/* stop ring operation after completion of the currently executing command */ +#define CMD_RING_PAUSE (1 << 1) +/* stop ring immediately - abort the currently executing command */ +#define CMD_RING_ABORT (1 << 2) +/* true: command ring is running */ +#define CMD_RING_RUNNING (1 << 3) +/* bits 4:5 reserved and should be preserved */ +/* Command Ring pointer - bit mask for the lower 32 bits. */ +#define CMD_RING_RSVD_BITS (0x3f) + +/* CONFIG - Configure Register - config_reg bitmasks */ +/* bits 0:7 - maximum number of device slots enabled (NumSlotsEn) */ +#define MAX_DEVS(p) ((p) & 0xff) +/* bits 8:31 - reserved and should be preserved */ + +/* PORTSC - Port Status and Control Register - port_status_base bitmasks */ +/* true: device connected */ +#define PORT_CONNECT (1 << 0) +/* true: port enabled */ +#define PORT_PE (1 << 1) +/* bit 2 reserved and zeroed */ +/* true: port has an over-current condition */ +#define PORT_OC (1 << 3) +/* true: port reset signaling asserted */ +#define PORT_RESET (1 << 4) +/* Port Link State - bits 5:8 + * A read gives the current link PM state of the port, + * a write with Link State Write Strobe set sets the link state. + */ +#define PORT_PLS_MASK (0xf << 5) +#define XDEV_U0 (0x0 << 5) +#define XDEV_U2 (0x2 << 5) +#define XDEV_U3 (0x3 << 5) +#define XDEV_RESUME (0xf << 5) +/* true: port has power (see HCC_PPC) */ +#define PORT_POWER (1 << 9) +/* bits 10:13 indicate device speed: + * 0 - undefined speed - port hasn't be initialized by a reset yet + * 1 - full speed + * 2 - low speed + * 3 - high speed + * 4 - super speed + * 5-15 reserved + */ +#define DEV_SPEED_MASK (0xf << 10) +#define XDEV_FS (0x1 << 10) +#define XDEV_LS (0x2 << 10) +#define XDEV_HS (0x3 << 10) +#define XDEV_SS (0x4 << 10) +#define DEV_UNDEFSPEED(p) (((p) & DEV_SPEED_MASK) == (0x0<<10)) +#define DEV_FULLSPEED(p) (((p) & DEV_SPEED_MASK) == XDEV_FS) +#define DEV_LOWSPEED(p) (((p) & DEV_SPEED_MASK) == XDEV_LS) +#define DEV_HIGHSPEED(p) (((p) & DEV_SPEED_MASK) == XDEV_HS) +#define DEV_SUPERSPEED(p) (((p) & DEV_SPEED_MASK) == XDEV_SS) +/* Bits 20:23 in the Slot Context are the speed for the device */ +#define SLOT_SPEED_FS (XDEV_FS << 10) +#define SLOT_SPEED_LS (XDEV_LS << 10) +#define SLOT_SPEED_HS (XDEV_HS << 10) +#define SLOT_SPEED_SS (XDEV_SS << 10) +/* Port Indicator Control */ +#define PORT_LED_OFF (0 << 14) +#define PORT_LED_AMBER (1 << 14) +#define PORT_LED_GREEN (2 << 14) +#define PORT_LED_MASK (3 << 14) +/* Port Link State Write Strobe - set this when changing link state */ +#define PORT_LINK_STROBE (1 << 16) +/* true: connect status change */ +#define PORT_CSC (1 << 17) +/* true: port enable change */ +#define PORT_PEC (1 << 18) +/* true: warm reset for a USB 3.0 device is done. A "hot" reset puts the port + * into an enabled state, and the device into the default state. A "warm" reset + * also resets the link, forcing the device through the link training sequence. + * SW can also look at the Port Reset register to see when warm reset is done. + */ +#define PORT_WRC (1 << 19) +/* true: over-current change */ +#define PORT_OCC (1 << 20) +/* true: reset change - 1 to 0 transition of PORT_RESET */ +#define PORT_RC (1 << 21) +/* port link status change - set on some port link state transitions: + * Transition Reason + * -------------------------------------------------------------------------- + * - U3 to Resume Wakeup signaling from a device + * - Resume to Recovery to U0 USB 3.0 device resume + * - Resume to U0 USB 2.0 device resume + * - U3 to Recovery to U0 Software resume of USB 3.0 device complete + * - U3 to U0 Software resume of USB 2.0 device complete + * - U2 to U0 L1 resume of USB 2.1 device complete + * - U0 to U0 (???) L1 entry rejection by USB 2.1 device + * - U0 to disabled L1 entry error with USB 2.1 device + * - Any state to inactive Error on USB 3.0 port + */ +#define PORT_PLC (1 << 22) +/* port configure error change - port failed to configure its link partner */ +#define PORT_CEC (1 << 23) +/* bit 24 reserved */ +/* wake on connect (enable) */ +#define PORT_WKCONN_E (1 << 25) +/* wake on disconnect (enable) */ +#define PORT_WKDISC_E (1 << 26) +/* wake on over-current (enable) */ +#define PORT_WKOC_E (1 << 27) +/* bits 28:29 reserved */ +/* true: device is removable - for USB 3.0 roothub emulation */ +#define PORT_DEV_REMOVE (1 << 30) +/* Initiate a warm port reset - complete when PORT_WRC is '1' */ +#define PORT_WR (1 << 31) + +/* We mark duplicate entries with -1 */ +#define DUPLICATE_ENTRY ((u8)(-1)) + +/* Port Power Management Status and Control - port_power_base bitmasks */ +/* Inactivity timer value for transitions into U1, in microseconds. + * Timeout can be up to 127us. 0xFF means an infinite timeout. + */ +#define PORT_U1_TIMEOUT(p) ((p) & 0xff) +/* Inactivity timer value for transitions into U2 */ +#define PORT_U2_TIMEOUT(p) (((p) & 0xff) << 8) +/* Bits 24:31 for port testing */ + +/* USB2 Protocol PORTSPMSC */ +#define PORT_L1S_MASK 7 +#define PORT_L1S_SUCCESS 1 +#define PORT_RWE (1 << 3) +#define PORT_HIRD(p) (((p) & 0xf) << 4) +#define PORT_HIRD_MASK (0xf << 4) +#define PORT_L1DS(p) (((p) & 0xff) << 8) +#define PORT_HLE (1 << 16) + +/** +* struct xhci_intr_reg - Interrupt Register Set +* @irq_pending: IMAN - Interrupt Management Register. Used to enable +* interrupts and check for pending interrupts. +* @irq_control: IMOD - Interrupt Moderation Register. +* Used to throttle interrupts. +* @erst_size: Number of segments in the + Event Ring Segment Table (ERST). +* @erst_base: ERST base address. +* @erst_dequeue: Event ring dequeue pointer. +* +* Each interrupter (defined by a MSI-X vector) has an event ring and an Event +* Ring Segment Table (ERST) associated with it. +* The event ring is comprised of multiple segments of the same size. +* The HC places events on the ring and "updates the Cycle bit in the TRBs to +* indicate to software the current position of the Enqueue Pointer." +* The HCD (Linux) processes those events and updates the dequeue pointer. +*/ +struct xhci_intr_reg { + volatile __le32 irq_pending; + volatile __le32 irq_control; + volatile __le32 erst_size; + volatile __le32 rsvd; + volatile __le64 erst_base; + volatile __le64 erst_dequeue; +}; + +/* irq_pending bitmasks */ +#define ER_IRQ_PENDING(p) ((p) & 0x1) +/* bits 2:31 need to be preserved */ +/* THIS IS BUGGY - FIXME - IP IS WRITE 1 TO CLEAR */ +#define ER_IRQ_CLEAR(p) ((p) & 0xfffffffe) +#define ER_IRQ_ENABLE(p) ((ER_IRQ_CLEAR(p)) | 0x2) +#define ER_IRQ_DISABLE(p) ((ER_IRQ_CLEAR(p)) & ~(0x2)) + +/* irq_control bitmasks */ +/* Minimum interval between interrupts (in 250ns intervals). The interval + * between interrupts will be longer if there are no events on the event ring. + * Default is 4000 (1 ms). + */ +#define ER_IRQ_INTERVAL_MASK (0xffff) +/* Counter used to count down the time to the next interrupt - HW use only */ +#define ER_IRQ_COUNTER_MASK (0xffff << 16) + +/* erst_size bitmasks */ +/* Preserve bits 16:31 of erst_size */ +#define ERST_SIZE_MASK (0xffff << 16) + +/* erst_dequeue bitmasks */ +/* Dequeue ERST Segment Index (DESI) - Segment number (or alias) + * where the current dequeue pointer lies. This is an optional HW hint. + */ +#define ERST_DESI_MASK (0x7) +/* Event Handler Busy (EHB) - is the event ring scheduled to be serviced by + * a work queue (or delayed service routine)? + */ +#define ERST_EHB (1 << 3) +#define ERST_PTR_MASK (0xf) + +/** + * struct xhci_run_regs + * @microframe_index: MFINDEX - current microframe number + * + * Section 5.5 Host Controller Runtime Registers: + * "Software should read and write these registers using only Dword (32 bit) + * or larger accesses" + */ +struct xhci_run_regs { + __le32 microframe_index; + __le32 rsvd[7]; + struct xhci_intr_reg ir_set[128]; +}; + +/** + * struct doorbell_array + * + * Bits 0 - 7: Endpoint target + * Bits 8 - 15: RsvdZ + * Bits 16 - 31: Stream ID + * + * Section 5.6 + */ +struct xhci_doorbell_array { + volatile __le32 doorbell[256]; +}; + +#define DB_VALUE(ep, stream) ((((ep) + 1) & 0xff) | ((stream) << 16)) +#define DB_VALUE_HOST 0x00000000 + +/** + * struct xhci_protocol_caps + * @revision: major revision, minor revision, capability ID, + * and next capability pointer. + * @name_string: Four ASCII characters to say which spec this xHC + * follows, typically "USB ". + * @port_info: Port offset, count, and protocol-defined information. + */ +struct xhci_protocol_caps { + u32 revision; + u32 name_string; + u32 port_info; +}; + +#define XHCI_EXT_PORT_MAJOR(x) (((x) >> 24) & 0xff) +#define XHCI_EXT_PORT_OFF(x) ((x) & 0xff) +#define XHCI_EXT_PORT_COUNT(x) (((x) >> 8) & 0xff) + +/** + * struct xhci_container_ctx + * @type: Type of context. Used to calculated offsets to contained contexts. + * @size: Size of the context data + * @bytes: The raw context data given to HW + * @dma: dma address of the bytes + * + * Represents either a Device or Input context. Holds a pointer to the raw + * memory used for the context (bytes) and dma address of it (dma). + */ +struct xhci_container_ctx { + unsigned type; +#define XHCI_CTX_TYPE_DEVICE 0x1 +#define XHCI_CTX_TYPE_INPUT 0x2 + + int size; + u8 *bytes; +}; + +/** + * struct xhci_slot_ctx + * @dev_info: Route string, device speed, hub info, and last valid endpoint + * @dev_info2: Max exit latency for device number, root hub port number + * @tt_info: tt_info is used to construct split transaction tokens + * @dev_state: slot state and device address + * + * Slot Context - section 6.2.1.1. This assumes the HC uses 32-byte context + * structures. If the HC uses 64-byte contexts, there is an additional 32 bytes + * reserved at the end of the slot context for HC internal use. + */ +struct xhci_slot_ctx { + __le32 dev_info; + __le32 dev_info2; + __le32 tt_info; + __le32 dev_state; + /* offset 0x10 to 0x1f reserved for HC internal use */ + __le32 reserved[4]; +}; + +/* dev_info bitmasks */ +/* Route String - 0:19 */ +#define ROUTE_STRING_MASK (0xfffff) +/* Device speed - values defined by PORTSC Device Speed field - 20:23 */ +#define DEV_SPEED (0xf << 20) +/* bit 24 reserved */ +/* Is this LS/FS device connected through a HS hub? - bit 25 */ +#define DEV_MTT (0x1 << 25) +/* Set if the device is a hub - bit 26 */ +#define DEV_HUB (0x1 << 26) +/* Index of the last valid endpoint context in this device context - 27:31 */ +#define LAST_CTX_MASK (0x1f << 27) +#define LAST_CTX(p) ((p) << 27) +#define LAST_CTX_TO_EP_NUM(p) (((p) >> 27) - 1) +#define SLOT_FLAG (1 << 0) +#define EP0_FLAG (1 << 1) + +/* dev_info2 bitmasks */ +/* Max Exit Latency (ms) - worst case time to wake up all links in dev path */ +#define MAX_EXIT (0xffff) +/* Root hub port number that is needed to access the USB device */ +#define ROOT_HUB_PORT(p) (((p) & 0xff) << 16) +#define ROOT_HUB_PORT_MASK (0xff) +#define ROOT_HUB_PORT_SHIFT (16) +#define DEVINFO_TO_ROOT_HUB_PORT(p) (((p) >> 16) & 0xff) +/* Maximum number of ports under a hub device */ +#define XHCI_MAX_PORTS(p) (((p) & 0xff) << 24) + +/* tt_info bitmasks */ +/* + * TT Hub Slot ID - for low or full speed devices attached to a high-speed hub + * The Slot ID of the hub that isolates the high speed signaling from + * this low or full-speed device. '0' if attached to root hub port. + */ +#define TT_SLOT (0xff) +/* + * The number of the downstream facing port of the high-speed hub + * '0' if the device is not low or full speed. + */ +#define TT_PORT (0xff << 8) +#define TT_THINK_TIME(p) (((p) & 0x3) << 16) + +/* dev_state bitmasks */ +/* USB device address - assigned by the HC */ +#define DEV_ADDR_MASK (0xff) +/* bits 8:26 reserved */ +/* Slot state */ +#define SLOT_STATE (0x1f << 27) +#define GET_SLOT_STATE(p) (((p) & (0x1f << 27)) >> 27) + +#define SLOT_STATE_DISABLED 0 +#define SLOT_STATE_ENABLED SLOT_STATE_DISABLED +#define SLOT_STATE_DEFAULT 1 +#define SLOT_STATE_ADDRESSED 2 +#define SLOT_STATE_CONFIGURED 3 + +/** + * struct xhci_ep_ctx + * @ep_info: endpoint state, streams, mult, and interval information. + * @ep_info2: information on endpoint type, max packet size, max burst size, + * error count, and whether the HC will force an event for all + * transactions. + * @deq: 64-bit ring dequeue pointer address. If the endpoint only + * defines one stream, this points to the endpoint transfer ring. + * Otherwise, it points to a stream context array, which has a + * ring pointer for each flow. + * @tx_info: + * Average TRB lengths for the endpoint ring and + * max payload within an Endpoint Service Interval Time (ESIT). + * + * Endpoint Context - section 6.2.1.2.This assumes the HC uses 32-byte context + * structures.If the HC uses 64-byte contexts, there is an additional 32 bytes + * reserved at the end of the endpoint context for HC internal use. + */ +struct xhci_ep_ctx { + __le32 ep_info; + __le32 ep_info2; + __le64 deq; + __le32 tx_info; + /* offset 0x14 - 0x1f reserved for HC internal use */ + __le32 reserved[3]; +}; + +/* ep_info bitmasks */ +/* + * Endpoint State - bits 0:2 + * 0 - disabled + * 1 - running + * 2 - halted due to halt condition - ok to manipulate endpoint ring + * 3 - stopped + * 4 - TRB error + * 5-7 - reserved + */ +#define EP_STATE_MASK (0xf) +#define EP_STATE_DISABLED 0 +#define EP_STATE_RUNNING 1 +#define EP_STATE_HALTED 2 +#define EP_STATE_STOPPED 3 +#define EP_STATE_ERROR 4 +/* Mult - Max number of burtst within an interval, in EP companion desc. */ +#define EP_MULT(p) (((p) & 0x3) << 8) +#define CTX_TO_EP_MULT(p) (((p) >> 8) & 0x3) +/* bits 10:14 are Max Primary Streams */ +/* bit 15 is Linear Stream Array */ +/* Interval - period between requests to an endpoint - 125u increments. */ +#define EP_INTERVAL(p) (((p) & 0xff) << 16) +#define EP_INTERVAL_TO_UFRAMES(p) (1 << (((p) >> 16) & 0xff)) +#define CTX_TO_EP_INTERVAL(p) (((p) >> 16) & 0xff) +#define EP_MAXPSTREAMS_MASK (0x1f << 10) +#define EP_MAXPSTREAMS(p) (((p) << 10) & EP_MAXPSTREAMS_MASK) +/* Endpoint is set up with a Linear Stream Array (vs. Secondary Stream Array) */ +#define EP_HAS_LSA (1 << 15) + +/* ep_info2 bitmasks */ +/* + * Force Event - generate transfer events for all TRBs for this endpoint + * This will tell the HC to ignore the IOC and ISP flags (for debugging only). + */ +#define FORCE_EVENT (0x1) +#define ERROR_COUNT(p) (((p) & 0x3) << 1) +#define ERROR_COUNT_SHIFT (1) +#define ERROR_COUNT_MASK (0x3) +#define CTX_TO_EP_TYPE(p) (((p) >> 3) & 0x7) +#define EP_TYPE(p) ((p) << 3) +#define EP_TYPE_SHIFT (3) +#define ISOC_OUT_EP 1 +#define BULK_OUT_EP 2 +#define INT_OUT_EP 3 +#define CTRL_EP 4 +#define ISOC_IN_EP 5 +#define BULK_IN_EP 6 +#define INT_IN_EP 7 +/* bit 6 reserved */ +/* bit 7 is Host Initiate Disable - for disabling stream selection */ +#define MAX_BURST(p) (((p)&0xff) << 8) +#define MAX_BURST_MASK (0xff) +#define MAX_BURST_SHIFT (8) +#define CTX_TO_MAX_BURST(p) (((p) >> 8) & 0xff) +#define MAX_PACKET(p) (((p)&0xffff) << 16) +#define MAX_PACKET_MASK (0xffff) +#define MAX_PACKET_DECODED(p) (((p) >> 16) & 0xffff) +#define MAX_PACKET_SHIFT (16) + +/* Get max packet size from ep desc. Bit 10..0 specify the max packet size. + * USB2.0 spec 9.6.6. + */ +#define GET_MAX_PACKET(p) ((p) & 0x7ff) + +/* tx_info bitmasks */ +#define AVG_TRB_LENGTH_FOR_EP(p) ((p) & 0xffff) +#define MAX_ESIT_PAYLOAD_FOR_EP(p) (((p) & 0xffff) << 16) +#define CTX_TO_MAX_ESIT_PAYLOAD(p) (((p) >> 16) & 0xffff) + +/* deq bitmasks */ +#define EP_CTX_CYCLE_MASK (1 << 0) + + +/** + * struct xhci_input_control_context + * Input control context; see section 6.2.5. + * + * @drop_context: set the bit of the endpoint context you want to disable + * @add_context: set the bit of the endpoint context you want to enable + */ +struct xhci_input_control_ctx { + volatile __le32 drop_flags; + volatile __le32 add_flags; + __le32 rsvd2[6]; +}; + + +/** + * struct xhci_device_context_array + * @dev_context_ptr array of 64-bit DMA addresses for device contexts + */ +struct xhci_device_context_array { + /* 64-bit device addresses; we only write 32-bit addresses */ + __le64 dev_context_ptrs[MAX_HC_SLOTS]; +}; +/* TODO: write function to set the 64-bit device DMA address */ +/* + * TODO: change this to be dynamically sized at HC mem init time since the HC + * might not be able to handle the maximum number of devices possible. + */ + + +struct xhci_transfer_event { + /* 64-bit buffer address, or immediate data */ + __le64 buffer; + __le32 transfer_len; + /* This field is interpreted differently based on the type of TRB */ + volatile __le32 flags; +}; + +/* Transfer event TRB length bit mask */ +/* bits 0:23 */ +#define EVENT_TRB_LEN(p) ((p) & 0xffffff) + +/** Transfer Event bit fields **/ +#define TRB_TO_EP_ID(p) (((p) >> 16) & 0x1f) + +/* Completion Code - only applicable for some types of TRBs */ +#define COMP_CODE_MASK (0xff << 24) +#define COMP_CODE_SHIFT (24) +#define GET_COMP_CODE(p) (((p) & COMP_CODE_MASK) >> 24) + +typedef enum { + COMP_SUCCESS = 1, + /* Data Buffer Error */ + COMP_DB_ERR, /* 2 */ + /* Babble Detected Error */ + COMP_BABBLE, /* 3 */ + /* USB Transaction Error */ + COMP_TX_ERR, /* 4 */ + /* TRB Error - some TRB field is invalid */ + COMP_TRB_ERR, /* 5 */ + /* Stall Error - USB device is stalled */ + COMP_STALL, /* 6 */ + /* Resource Error - HC doesn't have memory for that device configuration */ + COMP_ENOMEM, /* 7 */ + /* Bandwidth Error - not enough room in schedule for this dev config */ + COMP_BW_ERR, /* 8 */ + /* No Slots Available Error - HC ran out of device slots */ + COMP_ENOSLOTS, /* 9 */ + /* Invalid Stream Type Error */ + COMP_STREAM_ERR, /* 10 */ + /* Slot Not Enabled Error - doorbell rung for disabled device slot */ + COMP_EBADSLT, /* 11 */ + /* Endpoint Not Enabled Error */ + COMP_EBADEP,/* 12 */ + /* Short Packet */ + COMP_SHORT_TX, /* 13 */ + /* Ring Underrun - doorbell rung for an empty isoc OUT ep ring */ + COMP_UNDERRUN, /* 14 */ + /* Ring Overrun - isoc IN ep ring is empty when ep is scheduled to RX */ + COMP_OVERRUN, /* 15 */ + /* Virtual Function Event Ring Full Error */ + COMP_VF_FULL, /* 16 */ + /* Parameter Error - Context parameter is invalid */ + COMP_EINVAL, /* 17 */ + /* Bandwidth Overrun Error - isoc ep exceeded its allocated bandwidth */ + COMP_BW_OVER,/* 18 */ + /* Context State Error - illegal context state transition requested */ + COMP_CTX_STATE,/* 19 */ + /* No Ping Response Error - HC didn't get PING_RESPONSE in time to TX */ + COMP_PING_ERR,/* 20 */ + /* Event Ring is full */ + COMP_ER_FULL,/* 21 */ + /* Incompatible Device Error */ + COMP_DEV_ERR,/* 22 */ + /* Missed Service Error - HC couldn't service an isoc ep within interval */ + COMP_MISSED_INT,/* 23 */ + /* Successfully stopped command ring */ + COMP_CMD_STOP, /* 24 */ + /* Successfully aborted current command and stopped command ring */ + COMP_CMD_ABORT, /* 25 */ + /* Stopped - transfer was terminated by a stop endpoint command */ + COMP_STOP,/* 26 */ + /* Same as COMP_EP_STOPPED, but the transferred length in the event + * is invalid */ + COMP_STOP_INVAL, /* 27*/ + /* Control Abort Error - Debug Capability - control pipe aborted */ + COMP_DBG_ABORT, /* 28 */ + /* Max Exit Latency Too Large Error */ + COMP_MEL_ERR,/* 29 */ + /* TRB type 30 reserved */ + /* Isoc Buffer Overrun - an isoc IN ep sent more data than could fit in TD */ + COMP_BUFF_OVER = 31, + /* Event Lost Error - xHC has an "internal event overrun condition" */ + COMP_ISSUES, /* 32 */ + /* Undefined Error - reported when other error codes don't apply */ + COMP_UNKNOWN, /* 33 */ + /* Invalid Stream ID Error */ + COMP_STRID_ERR, /* 34 */ + /* Secondary Bandwidth Error - may be returned by a Configure Endpoint cmd */ + COMP_2ND_BW_ERR, /* 35 */ + /* Split Transaction Error */ + COMP_SPLIT_ERR /* 36 */ + +} xhci_comp_code; + +struct xhci_link_trb { + /* 64-bit segment pointer*/ + volatile __le64 segment_ptr; + volatile __le32 intr_target; + volatile __le32 control; +}; + +/* control bitfields */ +#define LINK_TOGGLE (0x1 << 1) + +/* Command completion event TRB */ +struct xhci_event_cmd { + /* Pointer to command TRB, or the value passed by the event data trb */ + volatile __le64 cmd_trb; + volatile __le32 status; + volatile __le32 flags; +}; + +/* flags bitmasks */ +/* bits 16:23 are the virtual function ID */ +/* bits 24:31 are the slot ID */ +#define TRB_TO_SLOT_ID(p) (((p) & (0xff << 24)) >> 24) +#define TRB_TO_SLOT_ID_SHIFT (24) +#define TRB_TO_SLOT_ID_MASK (0xff << TRB_TO_SLOT_ID_SHIFT) +#define SLOT_ID_FOR_TRB(p) (((p) & 0xff) << 24) +#define SLOT_ID_FOR_TRB_MASK (0xff) +#define SLOT_ID_FOR_TRB_SHIFT (24) + +/* Stop Endpoint TRB - ep_index to endpoint ID for this TRB */ +#define TRB_TO_EP_INDEX(p) ((((p) & (0x1f << 16)) >> 16) - 1) +#define EP_ID_FOR_TRB(p) ((((p) + 1) & 0x1f) << 16) + +#define SUSPEND_PORT_FOR_TRB(p) (((p) & 1) << 23) +#define TRB_TO_SUSPEND_PORT(p) (((p) & (1 << 23)) >> 23) +#define LAST_EP_INDEX 30 + +/* Set TR Dequeue Pointer command TRB fields */ +#define TRB_TO_STREAM_ID(p) ((((p) & (0xffff << 16)) >> 16)) +#define STREAM_ID_FOR_TRB(p) ((((p)) & 0xffff) << 16) + + +/* Port Status Change Event TRB fields */ +/* Port ID - bits 31:24 */ +#define GET_PORT_ID(p) (((p) & (0xff << 24)) >> 24) +#define PORT_ID_SHIFT (24) +#define PORT_ID_MASK (0xff << PORT_ID_SHIFT) + +/* Normal TRB fields */ +/* transfer_len bitmasks - bits 0:16 */ +#define TRB_LEN(p) ((p) & 0x1ffff) +#define TRB_LEN_MASK (0x1ffff) +/* Interrupter Target - which MSI-X vector to target the completion event at */ +#define TRB_INTR_TARGET_SHIFT (22) +#define TRB_INTR_TARGET_MASK (0x3ff) +#define TRB_INTR_TARGET(p) (((p) & 0x3ff) << 22) +#define GET_INTR_TARGET(p) (((p) >> 22) & 0x3ff) +#define TRB_TBC(p) (((p) & 0x3) << 7) +#define TRB_TLBPC(p) (((p) & 0xf) << 16) + +/* Cycle bit - indicates TRB ownership by HC or HCD */ +#define TRB_CYCLE (1<<0) +/* + * Force next event data TRB to be evaluated before task switch. + * Used to pass OS data back after a TD completes. + */ +#define TRB_ENT (1<<1) +/* Interrupt on short packet */ +#define TRB_ISP (1<<2) +/* Set PCIe no snoop attribute */ +#define TRB_NO_SNOOP (1<<3) +/* Chain multiple TRBs into a TD */ +#define TRB_CHAIN (1<<4) +/* Interrupt on completion */ +#define TRB_IOC (1<<5) +/* The buffer pointer contains immediate data */ +#define TRB_IDT (1<<6) + +/* Block Event Interrupt */ +#define TRB_BEI (1<<9) + +/* Control transfer TRB specific fields */ +#define TRB_DIR_IN (1<<16) +#define TRB_TX_TYPE(p) ((p) << 16) +#define TRB_TX_TYPE_SHIFT (16) +#define TRB_DATA_OUT 2 +#define TRB_DATA_IN 3 + +/* Isochronous TRB specific fields */ +#define TRB_SIA (1 << 31) + +struct xhci_generic_trb { + volatile __le32 field[4]; +}; + +union xhci_trb { + struct xhci_link_trb link; + struct xhci_transfer_event trans_event; + struct xhci_event_cmd event_cmd; + struct xhci_generic_trb generic; +}; + +/* TRB bit mask */ +#define TRB_TYPE_BITMASK (0xfc00) +#define TRB_TYPE(p) ((p) << 10) +#define TRB_TYPE_SHIFT (10) +#define TRB_FIELD_TO_TYPE(p) (((p) & TRB_TYPE_BITMASK) >> 10) + +/* TRB type IDs */ +typedef enum { + /* bulk, interrupt, isoc scatter/gather, and control data stage */ + TRB_NORMAL = 1, + /* setup stage for control transfers */ + TRB_SETUP, /* 2 */ + /* data stage for control transfers */ + TRB_DATA, /* 3 */ + /* status stage for control transfers */ + TRB_STATUS, /* 4 */ + /* isoc transfers */ + TRB_ISOC, /* 5 */ + /* TRB for linking ring segments */ + TRB_LINK, /* 6 */ + /* TRB for EVENT DATA */ + TRB_EVENT_DATA, /* 7 */ + /* Transfer Ring No-op (not for the command ring) */ + TRB_TR_NOOP, /* 8 */ + /* Command TRBs */ + /* Enable Slot Command */ + TRB_ENABLE_SLOT, /* 9 */ + /* Disable Slot Command */ + TRB_DISABLE_SLOT, /* 10 */ + /* Address Device Command */ + TRB_ADDR_DEV, /* 11 */ + /* Configure Endpoint Command */ + TRB_CONFIG_EP, /* 12 */ + /* Evaluate Context Command */ + TRB_EVAL_CONTEXT, /* 13 */ + /* Reset Endpoint Command */ + TRB_RESET_EP, /* 14 */ + /* Stop Transfer Ring Command */ + TRB_STOP_RING, /* 15 */ + /* Set Transfer Ring Dequeue Pointer Command */ + TRB_SET_DEQ, /* 16 */ + /* Reset Device Command */ + TRB_RESET_DEV, /* 17 */ + /* Force Event Command (opt) */ + TRB_FORCE_EVENT, /* 18 */ + /* Negotiate Bandwidth Command (opt) */ + TRB_NEG_BANDWIDTH, /* 19 */ + /* Set Latency Tolerance Value Command (opt) */ + TRB_SET_LT, /* 20 */ + /* Get port bandwidth Command */ + TRB_GET_BW, /* 21 */ + /* Force Header Command - generate a transaction or link management packet */ + TRB_FORCE_HEADER, /* 22 */ + /* No-op Command - not for transfer rings */ + TRB_CMD_NOOP, /* 23 */ + /* TRB IDs 24-31 reserved */ + /* Event TRBS */ + /* Transfer Event */ + TRB_TRANSFER = 32, + /* Command Completion Event */ + TRB_COMPLETION, /* 33 */ + /* Port Status Change Event */ + TRB_PORT_STATUS, /* 34 */ + /* Bandwidth Request Event (opt) */ + TRB_BANDWIDTH_EVENT, /* 35 */ + /* Doorbell Event (opt) */ + TRB_DOORBELL, /* 36 */ + /* Host Controller Event */ + TRB_HC_EVENT, /* 37 */ + /* Device Notification Event - device sent function wake notification */ + TRB_DEV_NOTE, /* 38 */ + /* MFINDEX Wrap Event - microframe counter wrapped */ + TRB_MFINDEX_WRAP, /* 39 */ + /* TRB IDs 40-47 reserved, 48-63 is vendor-defined */ + /* Nec vendor-specific command completion event. */ + TRB_NEC_CMD_COMP = 48, /* 48 */ + /* Get NEC firmware revision. */ + TRB_NEC_GET_FW, /* 49 */ +} trb_type; + +#define TRB_TYPE_LINK(x) (((x) & TRB_TYPE_BITMASK) == TRB_TYPE(TRB_LINK)) +/* Above, but for __le32 types -- can avoid work by swapping constants: */ +#define TRB_TYPE_LINK_LE32(x) (((x) & cpu_to_le32(TRB_TYPE_BITMASK)) == \ + cpu_to_le32(TRB_TYPE(TRB_LINK))) +#define TRB_TYPE_NOOP_LE32(x) (((x) & cpu_to_le32(TRB_TYPE_BITMASK)) == \ + cpu_to_le32(TRB_TYPE(TRB_TR_NOOP))) + +/* + * TRBS_PER_SEGMENT must be a multiple of 4, + * since the command ring is 64-byte aligned. + * It must also be greater than 16. + */ +#define TRBS_PER_SEGMENT 64 +/* Allow two commands + a link TRB, along with any reserved command TRBs */ +#define MAX_RSVD_CMD_TRBS (TRBS_PER_SEGMENT - 3) +#define SEGMENT_SIZE (TRBS_PER_SEGMENT*16) +/* SEGMENT_SHIFT should be log2(SEGMENT_SIZE). + * Change this if you change TRBS_PER_SEGMENT! + */ +#define SEGMENT_SHIFT 10 +/* TRB buffer pointers can't cross 64KB boundaries */ +#define TRB_MAX_BUFF_SHIFT 16 +#define TRB_MAX_BUFF_SIZE (1 << TRB_MAX_BUFF_SHIFT) + +struct xhci_segment { + union xhci_trb *trbs; + /* private to HCD */ + struct xhci_segment *next; +}; + +struct xhci_ring { + struct xhci_segment *first_seg; + union xhci_trb *enqueue; + struct xhci_segment *enq_seg; + union xhci_trb *dequeue; + struct xhci_segment *deq_seg; + /* + * Write the cycle state into the TRB cycle field to give ownership of + * the TRB to the host controller (if we are the producer), or to check + * if we own the TRB (if we are the consumer). See section 4.9.1. + */ + volatile u32 cycle_state; + unsigned int num_segs; +}; + +struct xhci_erst_entry { + /* 64-bit event ring segment address */ + __le64 seg_addr; + __le32 seg_size; + /* Set to zero */ + __le32 rsvd; +}; + +struct xhci_erst { + struct xhci_erst_entry *entries; + unsigned int num_entries; + /* Num entries the ERST can contain */ + unsigned int erst_size; +}; + +/* + * Each segment table entry is 4*32bits long. 1K seems like an ok size: + * (1K bytes * 8bytes/bit) / (4*32 bits) = 64 segment entries in the table, + * meaning 64 ring segments. + * Initial allocated size of the ERST, in number of entries */ +#define ERST_NUM_SEGS 3 +/* Initial number of event segment rings allocated */ +#define ERST_ENTRIES 3 +/* Initial allocated size of the ERST, in number of entries */ +#define ERST_SIZE 64 +/* Poll every 60 seconds */ +#define POLL_TIMEOUT 60 +/* Stop endpoint command timeout (secs) for URB cancellation watchdog timer */ +#define XHCI_STOP_EP_CMD_TIMEOUT 5 +/* XXX: Make these module parameters */ + +struct xhci_virt_ep { + struct xhci_ring *ring; + unsigned int ep_state; +#define SET_DEQ_PENDING (1 << 0) +#define EP_HALTED (1 << 1) /* For stall handling */ +#define EP_HALT_PENDING (1 << 2) /* For URB cancellation */ +/* Transitioning the endpoint to using streams, don't enqueue URBs */ +#define EP_GETTING_STREAMS (1 << 3) +#define EP_HAS_STREAMS (1 << 4) +/* Transitioning the endpoint to not using streams, don't enqueue URBs */ +#define EP_GETTING_NO_STREAMS (1 << 5) +}; + +#define CTX_SIZE(_hcc) (HCC_64BYTE_CONTEXT(_hcc) ? 64 : 32) + +struct xhci_virt_device { + struct usb_device *udev; + /* + * Commands to the hardware are passed an "input context" that + * tells the hardware what to change in its data structures. + * The hardware will return changes in an "output context" that + * software must allocate for the hardware. We need to keep + * track of input and output contexts separately because + * these commands might fail and we don't trust the hardware. + */ + struct xhci_container_ctx *out_ctx; + /* Used for addressing devices and configuration changes */ + struct xhci_container_ctx *in_ctx; + /* Rings saved to ensure old alt settings can be re-instated */ +#define XHCI_MAX_RINGS_CACHED 31 + struct xhci_virt_ep eps[31]; +}; + +/* TODO: copied from ehci.h - can be refactored? */ +/* xHCI spec says all registers are little endian */ +static inline unsigned int xhci_readl(uint32_t volatile *regs) +{ + return readl(regs); +} + +static inline void xhci_writel(uint32_t volatile *regs, const unsigned int val) +{ + writel(val, regs); +} + +/* + * Registers should always be accessed with double word or quad word accesses. + * Some xHCI implementations may support 64-bit address pointers. Registers + * with 64-bit address pointers should be written to with dword accesses by + * writing the low dword first (ptr[0]), then the high dword (ptr[1]) second. + * xHCI implementations that do not support 64-bit address pointers will ignore + * the high dword, and write order is irrelevant. + */ +static inline u64 xhci_readq(__le64 volatile *regs) +{ + __u32 *ptr = (__u32 *)regs; + u64 val_lo = readl(ptr); + u64 val_hi = readl(ptr + 1); + return val_lo + (val_hi << 32); +} + +static inline void xhci_writeq(__le64 volatile *regs, const u64 val) +{ + __u32 *ptr = (__u32 *)regs; + u32 val_lo = lower_32_bits(val); + /* FIXME */ + u32 val_hi = 0; + writel(val_lo, ptr); + writel(val_hi, ptr + 1); +} + +int xhci_hcd_init(int index, struct xhci_hccr **ret_hccr, + struct xhci_hcor **ret_hcor); +void xhci_hcd_stop(int index); + + +/************************************************************* + EXTENDED CAPABILITY DEFINITIONS +*************************************************************/ +/* Up to 16 ms to halt an HC */ +#define XHCI_MAX_HALT_USEC (16*1000) +/* HC not running - set to 1 when run/stop bit is cleared. */ +#define XHCI_STS_HALT (1 << 0) + +/* HCCPARAMS offset from PCI base address */ +#define XHCI_HCC_PARAMS_OFFSET 0x10 +/* HCCPARAMS contains the first extended capability pointer */ +#define XHCI_HCC_EXT_CAPS(p) (((p)>>16)&0xffff) + +/* Command and Status registers offset from the Operational Registers address */ +#define XHCI_CMD_OFFSET 0x00 +#define XHCI_STS_OFFSET 0x04 + +#define XHCI_MAX_EXT_CAPS 50 + +/* Capability Register */ +/* bits 7:0 - how long is the Capabilities register */ +#define XHCI_HC_LENGTH(p) (((p) >> 00) & 0x00ff) + +/* Extended capability register fields */ +#define XHCI_EXT_CAPS_ID(p) (((p) >> 0) & 0xff) +#define XHCI_EXT_CAPS_NEXT(p) (((p) >> 8) & 0xff) +#define XHCI_EXT_CAPS_VAL(p) ((p) >> 16) +/* Extended capability IDs - ID 0 reserved */ +#define XHCI_EXT_CAPS_LEGACY 1 +#define XHCI_EXT_CAPS_PROTOCOL 2 +#define XHCI_EXT_CAPS_PM 3 +#define XHCI_EXT_CAPS_VIRT 4 +#define XHCI_EXT_CAPS_ROUTE 5 +/* IDs 6-9 reserved */ +#define XHCI_EXT_CAPS_DEBUG 10 +/* USB Legacy Support Capability - section 7.1.1 */ +#define XHCI_HC_BIOS_OWNED (1 << 16) +#define XHCI_HC_OS_OWNED (1 << 24) + +/* USB Legacy Support Capability - section 7.1.1 */ +/* Add this offset, plus the value of xECP in HCCPARAMS to the base address */ +#define XHCI_LEGACY_SUPPORT_OFFSET (0x00) + +/* USB Legacy Support Control and Status Register - section 7.1.2 */ +/* Add this offset, plus the value of xECP in HCCPARAMS to the base address */ +#define XHCI_LEGACY_CONTROL_OFFSET (0x04) +/* bits 1:2, 5:12, and 17:19 need to be preserved; bits 21:28 should be zero */ +#define XHCI_LEGACY_DISABLE_SMI ((0x3 << 1) + (0xff << 5) + (0x7 << 17)) + +/* USB 2.0 xHCI 0.96 L1C capability - section 7.2.2.1.3.2 */ +#define XHCI_L1C (1 << 16) + +/* USB 2.0 xHCI 1.0 hardware LMP capability - section 7.2.2.1.3.2 */ +#define XHCI_HLC (1 << 19) + +/* command register values to disable interrupts and halt the HC */ +/* start/stop HC execution - do not write unless HC is halted*/ +#define XHCI_CMD_RUN (1 << 0) +/* Event Interrupt Enable - get irq when EINT bit is set in USBSTS register */ +#define XHCI_CMD_EIE (1 << 2) +/* Host System Error Interrupt Enable - get irq when HSEIE bit set in USBSTS */ +#define XHCI_CMD_HSEIE (1 << 3) +/* Enable Wrap Event - '1' means xHC generates an event when MFINDEX wraps. */ +#define XHCI_CMD_EWE (1 << 10) + +#define XHCI_IRQS (XHCI_CMD_EIE | XHCI_CMD_HSEIE | XHCI_CMD_EWE) + +/* true: Controller Not Ready to accept doorbell or op reg writes after reset */ +#define XHCI_STS_CNR (1 << 11) + +struct xhci_ctrl { + struct xhci_hccr *hccr; /* R/O registers, not need for volatile */ + struct xhci_hcor *hcor; + struct xhci_doorbell_array *dba; + struct xhci_run_regs *run_regs; + struct xhci_device_context_array *dcbaa \ + __attribute__ ((aligned(ARCH_DMA_MINALIGN))); + struct xhci_ring *event_ring; + struct xhci_ring *cmd_ring; + struct xhci_ring *transfer_ring; + struct xhci_segment *seg; + struct xhci_intr_reg *ir_set; + struct xhci_erst erst; + struct xhci_erst_entry entry[ERST_NUM_SEGS]; + struct xhci_virt_device *devs[MAX_HC_SLOTS]; + int rootdev; +}; + +unsigned long trb_addr(struct xhci_segment *seg, union xhci_trb *trb); +struct xhci_input_control_ctx + *xhci_get_input_control_ctx(struct xhci_container_ctx *ctx); +struct xhci_slot_ctx *xhci_get_slot_ctx(struct xhci_ctrl *ctrl, + struct xhci_container_ctx *ctx); +struct xhci_ep_ctx *xhci_get_ep_ctx(struct xhci_ctrl *ctrl, + struct xhci_container_ctx *ctx, + unsigned int ep_index); +void xhci_endpoint_copy(struct xhci_ctrl *ctrl, + struct xhci_container_ctx *in_ctx, + struct xhci_container_ctx *out_ctx, + unsigned int ep_index); +void xhci_slot_copy(struct xhci_ctrl *ctrl, + struct xhci_container_ctx *in_ctx, + struct xhci_container_ctx *out_ctx); +void xhci_setup_addressable_virt_dev(struct usb_device *udev); +void xhci_queue_command(struct xhci_ctrl *ctrl, u8 *ptr, + u32 slot_id, u32 ep_index, trb_type cmd); +void xhci_acknowledge_event(struct xhci_ctrl *ctrl); +union xhci_trb *xhci_wait_for_event(struct xhci_ctrl *ctrl, trb_type expected); +int xhci_bulk_tx(struct usb_device *udev, unsigned long pipe, + int length, void *buffer); +int xhci_ctrl_tx(struct usb_device *udev, unsigned long pipe, + struct devrequest *req, int length, void *buffer); +int xhci_check_maxpacket(struct usb_device *udev); +void xhci_flush_cache(uint32_t addr, u32 type_len); +void xhci_inval_cache(uint32_t addr, u32 type_len); +void xhci_cleanup(struct xhci_ctrl *ctrl); +struct xhci_ring *xhci_ring_alloc(unsigned int num_segs, bool link_trbs); +int xhci_alloc_virt_device(struct usb_device *udev); +int xhci_mem_init(struct xhci_ctrl *ctrl, struct xhci_hccr *hccr, + struct xhci_hcor *hcor); + +#endif /* HOST_XHCI_H_ */ diff --git a/include/usb.h b/include/usb.h index 60db897..a96ec23 100644 --- a/include/usb.h +++ b/include/usb.h @@ -125,6 +125,8 @@ struct usb_device { struct usb_device *children[USB_MAXCHILDREN];

void *controller; /* hardware controller private data */ + /* slot_id - for xHCI enabled devices */ + unsigned int slot_id; };

/********************************************************************** @@ -138,7 +140,7 @@ struct usb_device { defined(CONFIG_USB_OMAP3) || defined(CONFIG_USB_DA8XX) || \ defined(CONFIG_USB_BLACKFIN) || defined(CONFIG_USB_AM35X) || \ defined(CONFIG_USB_MUSB_DSPS) || defined(CONFIG_USB_MUSB_AM35X) || \ - defined(CONFIG_USB_MUSB_OMAP2PLUS) + defined(CONFIG_USB_MUSB_OMAP2PLUS) || defined(CONFIG_USB_XHCI)

int usb_lowlevel_init(int index, void **controller); int usb_lowlevel_stop(int index); @@ -338,6 +340,10 @@ int usb_set_interface(struct usb_device *dev, int interface, int alternate); #define usb_pipecontrol(pipe) (usb_pipetype((pipe)) == PIPE_CONTROL) #define usb_pipebulk(pipe) (usb_pipetype((pipe)) == PIPE_BULK)

+#define usb_pipe_ep_index(pipe) \ + usb_pipecontrol(pipe) ? (usb_pipeendpoint(pipe) * 2) : \ + ((usb_pipeendpoint(pipe) * 2) - \ + (usb_pipein(pipe) ? 0 : 1))

/************************************************************************* * Hub Stuff @@ -382,5 +388,6 @@ struct usb_device *usb_alloc_new_device(void *controller);

int usb_new_device(struct usb_device *dev); void usb_free_device(void); +int usb_alloc_device(struct usb_device *dev);

#endif /*_USB_H_ */