#include "xhci-trace.h"
#include "xhci-dbgcap.h"
+static void dbc_free_ctx(struct device *dev, struct xhci_container_ctx *ctx)
+{
+ if (!ctx)
+ return;
+ dma_free_coherent(dev, ctx->size, ctx->bytes, ctx->dma);
+ kfree(ctx);
+}
+
+/* we use only one segment for DbC rings */
+static void dbc_ring_free(struct device *dev, struct xhci_ring *ring)
+{
+ if (!ring)
+ return;
+
+ if (ring->first_seg && ring->first_seg->trbs) {
+ dma_free_coherent(dev, TRB_SEGMENT_SIZE,
+ ring->first_seg->trbs,
+ ring->first_seg->dma);
+ kfree(ring->first_seg);
+ }
+ kfree(ring);
+}
+
static u32 xhci_dbc_populate_strings(struct dbc_str_descs *strings)
{
struct usb_string_descriptor *s_desc;
return string_length;
}
-static void xhci_dbc_init_contexts(struct xhci_hcd *xhci, u32 string_length)
+static void xhci_dbc_init_contexts(struct xhci_dbc *dbc, u32 string_length)
{
- struct xhci_dbc *dbc;
struct dbc_info_context *info;
struct xhci_ep_ctx *ep_ctx;
u32 dev_info;
dma_addr_t deq, dma;
unsigned int max_burst;
- dbc = xhci->dbc;
if (!dbc)
return;
ep_ctx->deq = cpu_to_le64(deq | dbc->ring_in->cycle_state);
/* Set DbC context and info registers: */
- xhci_write_64(xhci, dbc->ctx->dma, &dbc->regs->dccp);
+ lo_hi_writeq(dbc->ctx->dma, &dbc->regs->dccp);
dev_info = cpu_to_le32((DBC_VENDOR_ID << 16) | DBC_PROTOCOL);
writel(dev_info, &dbc->regs->devinfo1);
__releases(&dbc->lock)
__acquires(&dbc->lock)
{
- struct dbc_ep *dep = req->dep;
- struct xhci_dbc *dbc = dep->dbc;
- struct xhci_hcd *xhci = dbc->xhci;
- struct device *dev = xhci_to_hcd(dbc->xhci)->self.sysdev;
+ struct xhci_dbc *dbc = req->dbc;
+ struct device *dev = dbc->dev;
list_del_init(&req->list_pending);
req->trb_dma = 0;
dma_unmap_single(dev,
req->dma,
req->length,
- dbc_ep_dma_direction(dep));
+ dbc_ep_dma_direction(req));
/* Give back the transfer request: */
spin_unlock(&dbc->lock);
- req->complete(xhci, req);
+ req->complete(dbc, req);
spin_lock(&dbc->lock);
}
}
struct dbc_request *
-dbc_alloc_request(struct dbc_ep *dep, gfp_t gfp_flags)
+dbc_alloc_request(struct xhci_dbc *dbc, unsigned int direction, gfp_t flags)
{
struct dbc_request *req;
- req = kzalloc(sizeof(*req), gfp_flags);
+ if (direction != BULK_IN &&
+ direction != BULK_OUT)
+ return NULL;
+
+ if (!dbc)
+ return NULL;
+
+ req = kzalloc(sizeof(*req), flags);
if (!req)
return NULL;
- req->dep = dep;
+ req->dbc = dbc;
INIT_LIST_HEAD(&req->list_pending);
INIT_LIST_HEAD(&req->list_pool);
- req->direction = dep->direction;
+ req->direction = direction;
trace_xhci_dbc_alloc_request(req);
}
void
-dbc_free_request(struct dbc_ep *dep, struct dbc_request *req)
+dbc_free_request(struct dbc_request *req)
{
trace_xhci_dbc_free_request(req);
u64 addr;
union xhci_trb *trb;
unsigned int num_trbs;
- struct xhci_dbc *dbc = dep->dbc;
+ struct xhci_dbc *dbc = req->dbc;
struct xhci_ring *ring = dep->ring;
u32 length, control, cycle;
}
static int
-dbc_ep_do_queue(struct dbc_ep *dep, struct dbc_request *req)
+dbc_ep_do_queue(struct dbc_request *req)
{
int ret;
- struct device *dev;
- struct xhci_dbc *dbc = dep->dbc;
- struct xhci_hcd *xhci = dbc->xhci;
-
- dev = xhci_to_hcd(xhci)->self.sysdev;
+ struct xhci_dbc *dbc = req->dbc;
+ struct device *dev = dbc->dev;
+ struct dbc_ep *dep = &dbc->eps[req->direction];
if (!req->length || !req->buf)
return -EINVAL;
return 0;
}
-int dbc_ep_queue(struct dbc_ep *dep, struct dbc_request *req,
- gfp_t gfp_flags)
+int dbc_ep_queue(struct dbc_request *req)
{
unsigned long flags;
- struct xhci_dbc *dbc = dep->dbc;
+ struct xhci_dbc *dbc = req->dbc;
int ret = -ESHUTDOWN;
+ if (!dbc)
+ return -ENODEV;
+
+ if (req->direction != BULK_IN &&
+ req->direction != BULK_OUT)
+ return -EINVAL;
+
spin_lock_irqsave(&dbc->lock, flags);
if (dbc->state == DS_CONFIGURED)
- ret = dbc_ep_do_queue(dep, req);
+ ret = dbc_ep_do_queue(req);
spin_unlock_irqrestore(&dbc->lock, flags);
mod_delayed_work(system_wq, &dbc->event_work, 0);
return ret;
}
-static inline void xhci_dbc_do_eps_init(struct xhci_hcd *xhci, bool direction)
+static inline void xhci_dbc_do_eps_init(struct xhci_dbc *dbc, bool direction)
{
struct dbc_ep *dep;
- struct xhci_dbc *dbc = xhci->dbc;
dep = &dbc->eps[direction];
dep->dbc = dbc;
INIT_LIST_HEAD(&dep->list_pending);
}
-static void xhci_dbc_eps_init(struct xhci_hcd *xhci)
+static void xhci_dbc_eps_init(struct xhci_dbc *dbc)
{
- xhci_dbc_do_eps_init(xhci, BULK_OUT);
- xhci_dbc_do_eps_init(xhci, BULK_IN);
+ xhci_dbc_do_eps_init(dbc, BULK_OUT);
+ xhci_dbc_do_eps_init(dbc, BULK_IN);
}
-static void xhci_dbc_eps_exit(struct xhci_hcd *xhci)
+static void xhci_dbc_eps_exit(struct xhci_dbc *dbc)
{
- struct xhci_dbc *dbc = xhci->dbc;
-
memset(dbc->eps, 0, sizeof(struct dbc_ep) * ARRAY_SIZE(dbc->eps));
}
erst->entries = NULL;
}
-static int xhci_dbc_mem_init(struct xhci_hcd *xhci, gfp_t flags)
+static struct xhci_container_ctx *
+dbc_alloc_ctx(struct device *dev, gfp_t flags)
+{
+ struct xhci_container_ctx *ctx;
+
+ ctx = kzalloc(sizeof(*ctx), flags);
+ if (!ctx)
+ return NULL;
+
+ /* xhci 7.6.9, all three contexts; info, ep-out and ep-in. Each 64 bytes*/
+ ctx->size = 3 * DBC_CONTEXT_SIZE;
+ ctx->bytes = dma_alloc_coherent(dev, ctx->size, &ctx->dma, flags);
+ if (!ctx->bytes) {
+ kfree(ctx);
+ return NULL;
+ }
+ return ctx;
+}
+
+struct xhci_ring *
+xhci_dbc_ring_alloc(struct device *dev, enum xhci_ring_type type, gfp_t flags)
+{
+ struct xhci_ring *ring;
+ struct xhci_segment *seg;
+ dma_addr_t dma;
+
+ ring = kzalloc(sizeof(*ring), flags);
+ if (!ring)
+ return NULL;
+
+ ring->num_segs = 1;
+ ring->type = type;
+
+ seg = kzalloc(sizeof(*seg), flags);
+ if (!seg)
+ goto seg_fail;
+
+ ring->first_seg = seg;
+ ring->last_seg = seg;
+ seg->next = seg;
+
+ seg->trbs = dma_alloc_coherent(dev, TRB_SEGMENT_SIZE, &dma, flags);
+ if (!seg->trbs)
+ goto dma_fail;
+
+ seg->dma = dma;
+
+ /* Only event ring does not use link TRB */
+ if (type != TYPE_EVENT) {
+ union xhci_trb *trb = &seg->trbs[TRBS_PER_SEGMENT - 1];
+
+ trb->link.segment_ptr = cpu_to_le64(dma);
+ trb->link.control = cpu_to_le32(LINK_TOGGLE | TRB_TYPE(TRB_LINK));
+ }
+ INIT_LIST_HEAD(&ring->td_list);
+ xhci_initialize_ring_info(ring, 1);
+ return ring;
+dma_fail:
+ kfree(seg);
+seg_fail:
+ kfree(ring);
+ return NULL;
+}
+
+static int xhci_dbc_mem_init(struct xhci_dbc *dbc, gfp_t flags)
{
int ret;
dma_addr_t deq;
u32 string_length;
- struct xhci_dbc *dbc = xhci->dbc;
- struct device *dev = xhci_to_hcd(xhci)->self.controller;
+ struct device *dev = dbc->dev;
/* Allocate various rings for events and transfers: */
- dbc->ring_evt = xhci_ring_alloc(xhci, 1, 1, TYPE_EVENT, 0, flags);
+ dbc->ring_evt = xhci_dbc_ring_alloc(dev, TYPE_EVENT, flags);
if (!dbc->ring_evt)
goto evt_fail;
- dbc->ring_in = xhci_ring_alloc(xhci, 1, 1, TYPE_BULK, 0, flags);
+ dbc->ring_in = xhci_dbc_ring_alloc(dev, TYPE_BULK, flags);
if (!dbc->ring_in)
goto in_fail;
- dbc->ring_out = xhci_ring_alloc(xhci, 1, 1, TYPE_BULK, 0, flags);
+ dbc->ring_out = xhci_dbc_ring_alloc(dev, TYPE_BULK, flags);
if (!dbc->ring_out)
goto out_fail;
goto erst_fail;
/* Allocate context data structure: */
- dbc->ctx = xhci_alloc_container_ctx(xhci, XHCI_CTX_TYPE_DEVICE, flags);
+ dbc->ctx = dbc_alloc_ctx(dev, flags); /* was sysdev, and is still */
if (!dbc->ctx)
goto ctx_fail;
/* Setup ERST register: */
writel(dbc->erst.erst_size, &dbc->regs->ersts);
- xhci_write_64(xhci, dbc->erst.erst_dma_addr, &dbc->regs->erstba);
+
+ lo_hi_writeq(dbc->erst.erst_dma_addr, &dbc->regs->erstba);
deq = xhci_trb_virt_to_dma(dbc->ring_evt->deq_seg,
dbc->ring_evt->dequeue);
- xhci_write_64(xhci, deq, &dbc->regs->erdp);
+ lo_hi_writeq(deq, &dbc->regs->erdp);
/* Setup strings and contexts: */
string_length = xhci_dbc_populate_strings(dbc->string);
- xhci_dbc_init_contexts(xhci, string_length);
+ xhci_dbc_init_contexts(dbc, string_length);
- xhci_dbc_eps_init(xhci);
+ xhci_dbc_eps_init(dbc);
dbc->state = DS_INITIALIZED;
return 0;
string_fail:
- xhci_free_container_ctx(xhci, dbc->ctx);
+ dbc_free_ctx(dev, dbc->ctx);
dbc->ctx = NULL;
ctx_fail:
dbc_erst_free(dev, &dbc->erst);
erst_fail:
- xhci_ring_free(xhci, dbc->ring_out);
+ dbc_ring_free(dev, dbc->ring_out);
dbc->ring_out = NULL;
out_fail:
- xhci_ring_free(xhci, dbc->ring_in);
+ dbc_ring_free(dev, dbc->ring_in);
dbc->ring_in = NULL;
in_fail:
- xhci_ring_free(xhci, dbc->ring_evt);
+ dbc_ring_free(dev, dbc->ring_evt);
dbc->ring_evt = NULL;
evt_fail:
return -ENOMEM;
}
-static void xhci_dbc_mem_cleanup(struct xhci_hcd *xhci)
+static void xhci_dbc_mem_cleanup(struct xhci_dbc *dbc)
{
- struct xhci_dbc *dbc = xhci->dbc;
- struct device *dev = xhci_to_hcd(xhci)->self.controller;
-
if (!dbc)
return;
- xhci_dbc_eps_exit(xhci);
+ xhci_dbc_eps_exit(dbc);
if (dbc->string) {
dma_free_coherent(dbc->dev, dbc->string_size,
dbc->string = NULL;
}
- xhci_free_container_ctx(xhci, dbc->ctx);
+ dbc_free_ctx(dbc->dev, dbc->ctx);
dbc->ctx = NULL;
- dbc_erst_free(dev, &dbc->erst);
- xhci_ring_free(xhci, dbc->ring_out);
- xhci_ring_free(xhci, dbc->ring_in);
- xhci_ring_free(xhci, dbc->ring_evt);
+ dbc_erst_free(dbc->dev, &dbc->erst);
+ dbc_ring_free(dbc->dev, dbc->ring_out);
+ dbc_ring_free(dbc->dev, dbc->ring_in);
+ dbc_ring_free(dbc->dev, dbc->ring_evt);
dbc->ring_in = NULL;
dbc->ring_out = NULL;
dbc->ring_evt = NULL;
}
-static int xhci_do_dbc_start(struct xhci_hcd *xhci)
+static int xhci_do_dbc_start(struct xhci_dbc *dbc)
{
int ret;
u32 ctrl;
- struct xhci_dbc *dbc = xhci->dbc;
if (dbc->state != DS_DISABLED)
return -EINVAL;
if (ret)
return ret;
- ret = xhci_dbc_mem_init(xhci, GFP_ATOMIC);
+ ret = xhci_dbc_mem_init(dbc, GFP_ATOMIC);
if (ret)
return ret;
return 0;
}
-static int xhci_do_dbc_stop(struct xhci_hcd *xhci)
+static int xhci_do_dbc_stop(struct xhci_dbc *dbc)
{
- struct xhci_dbc *dbc = xhci->dbc;
-
if (dbc->state == DS_DISABLED)
return -1;
return 0;
}
-static int xhci_dbc_start(struct xhci_hcd *xhci)
+static int xhci_dbc_start(struct xhci_dbc *dbc)
{
int ret;
unsigned long flags;
- struct xhci_dbc *dbc = xhci->dbc;
WARN_ON(!dbc);
- pm_runtime_get_sync(xhci_to_hcd(xhci)->self.controller);
+ pm_runtime_get_sync(dbc->dev); /* note this was self.controller */
spin_lock_irqsave(&dbc->lock, flags);
- ret = xhci_do_dbc_start(xhci);
+ ret = xhci_do_dbc_start(dbc);
spin_unlock_irqrestore(&dbc->lock, flags);
if (ret) {
- pm_runtime_put(xhci_to_hcd(xhci)->self.controller);
+ pm_runtime_put(dbc->dev); /* note this was self.controller */
return ret;
}
return mod_delayed_work(system_wq, &dbc->event_work, 1);
}
-static void xhci_dbc_stop(struct xhci_hcd *xhci)
+static void xhci_dbc_stop(struct xhci_dbc *dbc)
{
int ret;
unsigned long flags;
- struct xhci_dbc *dbc = xhci->dbc;
- struct dbc_port *port = &dbc->port;
WARN_ON(!dbc);
- cancel_delayed_work_sync(&dbc->event_work);
+ switch (dbc->state) {
+ case DS_DISABLED:
+ return;
+ case DS_CONFIGURED:
+ case DS_STALLED:
+ if (dbc->driver->disconnect)
+ dbc->driver->disconnect(dbc);
+ break;
+ default:
+ break;
+ }
- if (port->registered)
- xhci_dbc_tty_unregister_device(xhci);
+ cancel_delayed_work_sync(&dbc->event_work);
spin_lock_irqsave(&dbc->lock, flags);
- ret = xhci_do_dbc_stop(xhci);
+ ret = xhci_do_dbc_stop(dbc);
spin_unlock_irqrestore(&dbc->lock, flags);
if (!ret) {
- xhci_dbc_mem_cleanup(xhci);
- pm_runtime_put_sync(xhci_to_hcd(xhci)->self.controller);
+ xhci_dbc_mem_cleanup(dbc);
+ pm_runtime_put_sync(dbc->dev); /* note, was self.controller */
}
}
writel(portsc & ~DBC_PORTSC_RESET_CHANGE, &dbc->regs->portsc);
}
-static void dbc_handle_xfer_event(struct xhci_hcd *xhci, union xhci_trb *event)
+static void dbc_handle_xfer_event(struct xhci_dbc *dbc, union xhci_trb *event)
{
struct dbc_ep *dep;
struct xhci_ring *ring;
u32 comp_code;
size_t remain_length;
struct dbc_request *req = NULL, *r;
- struct xhci_dbc *dbc = xhci->dbc;
comp_code = GET_COMP_CODE(le32_to_cpu(event->generic.field[2]));
remain_length = EVENT_TRB_LEN(le32_to_cpu(event->generic.field[2]));
ep_id = TRB_TO_EP_ID(le32_to_cpu(event->generic.field[3]));
dep = (ep_id == EPID_OUT) ?
- get_out_ep(xhci) : get_in_ep(xhci);
+ get_out_ep(dbc) : get_in_ep(dbc);
ring = dep->ring;
switch (comp_code) {
struct dbc_ep *dep;
union xhci_trb *evt;
u32 ctrl, portsc;
- struct xhci_hcd *xhci = dbc->xhci;
bool update_erdp = false;
/* DbC state machine: */
dbc->state = DS_STALLED;
if (ctrl & DBC_CTRL_HALT_IN_TR) {
- dep = get_in_ep(xhci);
+ dep = get_in_ep(dbc);
xhci_dbc_flush_endpoint_requests(dep);
}
if (ctrl & DBC_CTRL_HALT_OUT_TR) {
- dep = get_out_ep(xhci);
+ dep = get_out_ep(dbc);
xhci_dbc_flush_endpoint_requests(dep);
}
dbc_handle_port_status(dbc, evt);
break;
case TRB_TYPE(TRB_TRANSFER):
- dbc_handle_xfer_event(xhci, evt);
+ dbc_handle_xfer_event(dbc, evt);
break;
default:
break;
if (update_erdp) {
deq = xhci_trb_virt_to_dma(dbc->ring_evt->deq_seg,
dbc->ring_evt->dequeue);
- xhci_write_64(xhci, deq, &dbc->regs->erdp);
+ lo_hi_writeq(deq, &dbc->regs->erdp);
}
return EVT_DONE;
static void xhci_dbc_handle_events(struct work_struct *work)
{
- int ret;
enum evtreturn evtr;
struct xhci_dbc *dbc;
unsigned long flags;
- struct xhci_hcd *xhci;
dbc = container_of(to_delayed_work(work), struct xhci_dbc, event_work);
- xhci = dbc->xhci;
spin_lock_irqsave(&dbc->lock, flags);
evtr = xhci_dbc_do_handle_events(dbc);
switch (evtr) {
case EVT_GSER:
- ret = xhci_dbc_tty_register_device(xhci);
- if (ret) {
- dev_err(dbc->dev, "failed to alloc tty device\n");
- break;
- }
-
- dev_info(dbc->dev, "DbC now attached to /dev/ttyDBC0\n");
+ if (dbc->driver->configure)
+ dbc->driver->configure(dbc);
break;
case EVT_DISC:
- xhci_dbc_tty_unregister_device(xhci);
+ if (dbc->driver->disconnect)
+ dbc->driver->disconnect(dbc);
break;
case EVT_DONE:
break;
const char *buf, size_t count)
{
struct xhci_hcd *xhci;
+ struct xhci_dbc *dbc;
xhci = hcd_to_xhci(dev_get_drvdata(dev));
+ dbc = xhci->dbc;
if (!strncmp(buf, "enable", 6))
- xhci_dbc_start(xhci);
+ xhci_dbc_start(dbc);
else if (!strncmp(buf, "disable", 7))
- xhci_dbc_stop(xhci);
+ xhci_dbc_stop(dbc);
else
return -EINVAL;
if (ret)
goto init_err3;
- ret = xhci_dbc_tty_register_driver(xhci);
+ ret = xhci_dbc_tty_probe(xhci);
if (ret)
goto init_err2;
return 0;
init_err1:
- xhci_dbc_tty_unregister_driver();
+ xhci_dbc_tty_remove(xhci->dbc);
init_err2:
xhci_do_dbc_exit(xhci);
init_err3:
return;
device_remove_file(dev, &dev_attr_dbc);
- xhci_dbc_tty_unregister_driver();
- xhci_dbc_stop(xhci);
+ xhci_dbc_tty_remove(xhci->dbc);
+ xhci_dbc_stop(xhci->dbc);
xhci_do_dbc_exit(xhci);
}
if (dbc->state == DS_CONFIGURED)
dbc->resume_required = 1;
- xhci_dbc_stop(xhci);
+ xhci_dbc_stop(dbc);
return 0;
}
if (dbc->resume_required) {
dbc->resume_required = 0;
- xhci_dbc_start(xhci);
+ xhci_dbc_start(dbc);
}
return ret;
projects / platform / kernel / linux-rpi.git / blobdiff