* [PATCH v2 1/4] usb: host: export symbols for xhci hooks usage
2022-03-07 10:17 ` [PATCH v2 0/4] support USB offload feature Daehwan Jung
@ 2022-03-07 10:17 ` Daehwan Jung
2022-03-08 15:38 ` Krzysztof Kozlowski
2022-03-07 10:17 ` [PATCH v2 2/4] usb: host: add xhci hooks for USB offload Daehwan Jung
` (2 subsequent siblings)
3 siblings, 1 reply; 9+ messages in thread
From: Daehwan Jung @ 2022-03-07 10:17 UTC (permalink / raw)
To: Mathias Nyman, Greg Kroah-Hartman
Cc: open list:USB XHCI DRIVER, open list, Howard Yen, Jack Pham,
Puma Hsu, J . Avila, Daehwan Jung, sc.suh, cpgs, cpgsproxy5
Export symbols for xhci hooks usage:
xhci_ring_free
- Allow xhci hook to free xhci_ring.
xhci_get_slot_ctx
- Allow xhci hook to get slot_ctx from the xhci_container_ctx
for getting the slot_ctx information to know which slot is
offloading and compare the context in remote subsystem memory
if needed.
xhci_get_ep_ctx
- Allow xhci hook to get ep_ctx from the xhci_container_ctx for
getting the ep_ctx information to know which ep is offloading and
comparing the context in remote subsystem memory if needed.
xhci_handle_event
- Allow xhci hook to handle the xhci events from the USB
controller.
xhci_update_erst_dequeue
- If xhci events was handle by xhci hook, it needs to update
the erst dequeue pointer to let the USB controller know the
events was handled.
xhci_ring_alloc
- Allocate a struct xhci_ring.
xhci_alloc_erst
xhci_free_erst
- Allocate and free event ring segment tables.
xhci_trb_virt_to_dma
- Used to retrieve the DMA address of a TRB
xhci_ring_cmd_db
- Notify the controller when a new command is issued
xhci_alloc_command
xhci_free_command
- Allocate and free a struct xhci_command
xhci_queue_stop_endpoint
- Issue a stop endpoint command to the controller
xhci_segment_free
- Free a segment struct.
xhci_link_segments
- Make the prev segment point to the next segment.
xhci_initialize_ring_info
- Initialize a ring struct.
xhci_check_trb_in_td_math
- Check TRB math for validation.
xhci_get_endpoint_address
- Get endpoint address from endpoint index.
xhci_address_device
- Issue an address device command
xhci_bus_suspend
xhci_bus_resume
- Suspend and resume for power scenario
xhci_remove_stream_mapping
- Remove stream mapping in stream endpoint
xhci_remove_segment_mapping
- Remove segment mapping
Signed-off-by: Daehwan Jung <dh10.jung@samsung.com>
Signed-off-by: Jack Pham <jackp@codeaurora.org>
Signed-off-by: Howard Yen <howardyen@google.com>
---
drivers/usb/host/xhci-hub.c | 2 ++
drivers/usb/host/xhci-mem.c | 29 +++++++++++++++++++++--------
drivers/usb/host/xhci-ring.c | 9 +++++++--
drivers/usb/host/xhci.c | 4 +++-
4 files changed, 33 insertions(+), 11 deletions(-)
diff --git a/drivers/usb/host/xhci-hub.c b/drivers/usb/host/xhci-hub.c
index 1e7dc130c39a..56546aaa93c7 100644
--- a/drivers/usb/host/xhci-hub.c
+++ b/drivers/usb/host/xhci-hub.c
@@ -1812,6 +1812,7 @@ int xhci_bus_suspend(struct usb_hcd *hcd)
return 0;
}
+EXPORT_SYMBOL_GPL(xhci_bus_suspend);
/*
* Workaround for missing Cold Attach Status (CAS) if device re-plugged in S3.
@@ -1956,6 +1957,7 @@ int xhci_bus_resume(struct usb_hcd *hcd)
spin_unlock_irqrestore(&xhci->lock, flags);
return 0;
}
+EXPORT_SYMBOL_GPL(xhci_bus_resume);
unsigned long xhci_get_resuming_ports(struct usb_hcd *hcd)
{
diff --git a/drivers/usb/host/xhci-mem.c b/drivers/usb/host/xhci-mem.c
index bbb27ee2c6a3..45be6732eb89 100644
--- a/drivers/usb/host/xhci-mem.c
+++ b/drivers/usb/host/xhci-mem.c
@@ -65,7 +65,7 @@ static struct xhci_segment *xhci_segment_alloc(struct xhci_hcd *xhci,
return seg;
}
-static void xhci_segment_free(struct xhci_hcd *xhci, struct xhci_segment *seg)
+void xhci_segment_free(struct xhci_hcd *xhci, struct xhci_segment *seg)
{
if (seg->trbs) {
dma_pool_free(xhci->segment_pool, seg->trbs, seg->dma);
@@ -74,8 +74,9 @@ static void xhci_segment_free(struct xhci_hcd *xhci, struct xhci_segment *seg)
kfree(seg->bounce_buf);
kfree(seg);
}
+EXPORT_SYMBOL_GPL(xhci_segment_free);
-static void xhci_free_segments_for_ring(struct xhci_hcd *xhci,
+void xhci_free_segments_for_ring(struct xhci_hcd *xhci,
struct xhci_segment *first)
{
struct xhci_segment *seg;
@@ -96,9 +97,9 @@ static void xhci_free_segments_for_ring(struct xhci_hcd *xhci,
* DMA address of the next segment. The caller needs to set any Link TRB
* related flags, such as End TRB, Toggle Cycle, and no snoop.
*/
-static void xhci_link_segments(struct xhci_segment *prev,
- struct xhci_segment *next,
- enum xhci_ring_type type, bool chain_links)
+void xhci_link_segments(struct xhci_segment *prev,
+ struct xhci_segment *next,
+ enum xhci_ring_type type, bool chain_links)
{
u32 val;
@@ -118,6 +119,7 @@ static void xhci_link_segments(struct xhci_segment *prev,
prev->trbs[TRBS_PER_SEGMENT-1].link.control = cpu_to_le32(val);
}
}
+EXPORT_SYMBOL_GPL(xhci_link_segments);
/*
* Link the ring to the new segments.
@@ -206,7 +208,7 @@ static int xhci_insert_segment_mapping(struct radix_tree_root *trb_address_map,
return ret;
}
-static void xhci_remove_segment_mapping(struct radix_tree_root *trb_address_map,
+void xhci_remove_segment_mapping(struct radix_tree_root *trb_address_map,
struct xhci_segment *seg)
{
unsigned long key;
@@ -215,6 +217,7 @@ static void xhci_remove_segment_mapping(struct radix_tree_root *trb_address_map,
if (radix_tree_lookup(trb_address_map, key))
radix_tree_delete(trb_address_map, key);
}
+EXPORT_SYMBOL_GPL(xhci_remove_segment_mapping);
static int xhci_update_stream_segment_mapping(
struct radix_tree_root *trb_address_map,
@@ -256,7 +259,7 @@ static int xhci_update_stream_segment_mapping(
return ret;
}
-static void xhci_remove_stream_mapping(struct xhci_ring *ring)
+void xhci_remove_stream_mapping(struct xhci_ring *ring)
{
struct xhci_segment *seg;
@@ -269,6 +272,7 @@ static void xhci_remove_stream_mapping(struct xhci_ring *ring)
seg = seg->next;
} while (seg != ring->first_seg);
}
+EXPORT_SYMBOL_GPL(xhci_remove_stream_mapping);
static int xhci_update_stream_mapping(struct xhci_ring *ring, gfp_t mem_flags)
{
@@ -292,6 +296,7 @@ void xhci_ring_free(struct xhci_hcd *xhci, struct xhci_ring *ring)
kfree(ring);
}
+EXPORT_SYMBOL_GPL(xhci_ring_free);
void xhci_initialize_ring_info(struct xhci_ring *ring,
unsigned int cycle_state)
@@ -316,6 +321,7 @@ void xhci_initialize_ring_info(struct xhci_ring *ring,
*/
ring->num_trbs_free = ring->num_segs * (TRBS_PER_SEGMENT - 1) - 1;
}
+EXPORT_SYMBOL_GPL(xhci_initialize_ring_info);
/* Allocate segments and link them for a ring */
static int xhci_alloc_segments_for_ring(struct xhci_hcd *xhci,
@@ -407,6 +413,7 @@ struct xhci_ring *xhci_ring_alloc(struct xhci_hcd *xhci,
kfree(ring);
return NULL;
}
+EXPORT_SYMBOL_GPL(xhci_ring_alloc);
void xhci_free_endpoint_ring(struct xhci_hcd *xhci,
struct xhci_virt_device *virt_dev,
@@ -518,6 +525,7 @@ struct xhci_slot_ctx *xhci_get_slot_ctx(struct xhci_hcd *xhci,
return (struct xhci_slot_ctx *)
(ctx->bytes + CTX_SIZE(xhci->hcc_params));
}
+EXPORT_SYMBOL_GPL(xhci_get_slot_ctx);
struct xhci_ep_ctx *xhci_get_ep_ctx(struct xhci_hcd *xhci,
struct xhci_container_ctx *ctx,
@@ -1754,6 +1762,7 @@ struct xhci_command *xhci_alloc_command(struct xhci_hcd *xhci,
INIT_LIST_HEAD(&command->cmd_list);
return command;
}
+EXPORT_SYMBOL_GPL(xhci_alloc_command);
struct xhci_command *xhci_alloc_command_with_ctx(struct xhci_hcd *xhci,
bool allocate_completion, gfp_t mem_flags)
@@ -1787,6 +1796,7 @@ void xhci_free_command(struct xhci_hcd *xhci,
kfree(command->completion);
kfree(command);
}
+EXPORT_SYMBOL_GPL(xhci_free_command);
int xhci_alloc_erst(struct xhci_hcd *xhci,
struct xhci_ring *evt_ring,
@@ -1817,6 +1827,7 @@ int xhci_alloc_erst(struct xhci_hcd *xhci,
return 0;
}
+EXPORT_SYMBOL_GPL(xhci_alloc_erst);
void xhci_free_erst(struct xhci_hcd *xhci, struct xhci_erst *erst)
{
@@ -1830,6 +1841,7 @@ void xhci_free_erst(struct xhci_hcd *xhci, struct xhci_erst *erst)
erst->erst_dma_addr);
erst->entries = NULL;
}
+EXPORT_SYMBOL_GPL(xhci_free_erst);
void xhci_mem_cleanup(struct xhci_hcd *xhci)
{
@@ -1965,7 +1977,7 @@ static int xhci_test_trb_in_td(struct xhci_hcd *xhci,
}
/* TRB math checks for xhci_trb_in_td(), using the command and event rings. */
-static int xhci_check_trb_in_td_math(struct xhci_hcd *xhci)
+int xhci_check_trb_in_td_math(struct xhci_hcd *xhci)
{
struct {
dma_addr_t input_dma;
@@ -2085,6 +2097,7 @@ static int xhci_check_trb_in_td_math(struct xhci_hcd *xhci)
xhci_dbg(xhci, "TRB math tests passed.\n");
return 0;
}
+EXPORT_SYMBOL_GPL(xhci_check_trb_in_td_math);
static void xhci_set_hc_event_deq(struct xhci_hcd *xhci)
{
diff --git a/drivers/usb/host/xhci-ring.c b/drivers/usb/host/xhci-ring.c
index d0b6806275e0..2e99393560e5 100644
--- a/drivers/usb/host/xhci-ring.c
+++ b/drivers/usb/host/xhci-ring.c
@@ -79,6 +79,7 @@ dma_addr_t xhci_trb_virt_to_dma(struct xhci_segment *seg,
return 0;
return seg->dma + (segment_offset * sizeof(*trb));
}
+EXPORT_SYMBOL_GPL(xhci_trb_virt_to_dma);
static bool trb_is_noop(union xhci_trb *trb)
{
@@ -311,6 +312,7 @@ void xhci_ring_cmd_db(struct xhci_hcd *xhci)
/* Flush PCI posted writes */
readl(&xhci->dba->doorbell[0]);
}
+EXPORT_SYMBOL_GPL(xhci_ring_cmd_db);
static bool xhci_mod_cmd_timer(struct xhci_hcd *xhci, unsigned long delay)
{
@@ -2965,7 +2967,7 @@ static int handle_tx_event(struct xhci_hcd *xhci,
* Returns >0 for "possibly more events to process" (caller should call again),
* otherwise 0 if done. In future, <0 returns should indicate error code.
*/
-static int xhci_handle_event(struct xhci_hcd *xhci)
+int xhci_handle_event(struct xhci_hcd *xhci)
{
union xhci_trb *event;
int update_ptrs = 1;
@@ -3034,13 +3036,14 @@ static int xhci_handle_event(struct xhci_hcd *xhci)
*/
return 1;
}
+EXPORT_SYMBOL_GPL(xhci_handle_event);
/*
* Update Event Ring Dequeue Pointer:
* - When all events have finished
* - To avoid "Event Ring Full Error" condition
*/
-static void xhci_update_erst_dequeue(struct xhci_hcd *xhci,
+void xhci_update_erst_dequeue(struct xhci_hcd *xhci,
union xhci_trb *event_ring_deq)
{
u64 temp_64;
@@ -3070,6 +3073,7 @@ static void xhci_update_erst_dequeue(struct xhci_hcd *xhci,
temp_64 |= ERST_EHB;
xhci_write_64(xhci, temp_64, &xhci->ir_set->erst_dequeue);
}
+EXPORT_SYMBOL_GPL(xhci_update_erst_dequeue);
/*
* xHCI spec says we can get an interrupt, and if the HC has an error condition,
@@ -4420,6 +4424,7 @@ int xhci_queue_stop_endpoint(struct xhci_hcd *xhci, struct xhci_command *cmd,
return queue_command(xhci, cmd, 0, 0, 0,
trb_slot_id | trb_ep_index | type | trb_suspend, false);
}
+EXPORT_SYMBOL_GPL(xhci_queue_stop_endpoint);
int xhci_queue_reset_ep(struct xhci_hcd *xhci, struct xhci_command *cmd,
int slot_id, unsigned int ep_index,
diff --git a/drivers/usb/host/xhci.c b/drivers/usb/host/xhci.c
index 642610c78f58..8f53672dcd97 100644
--- a/drivers/usb/host/xhci.c
+++ b/drivers/usb/host/xhci.c
@@ -1457,6 +1457,7 @@ unsigned int xhci_get_endpoint_address(unsigned int ep_index)
unsigned int direction = ep_index % 2 ? USB_DIR_OUT : USB_DIR_IN;
return direction | number;
}
+EXPORT_SYMBOL_GPL(xhci_get_endpoint_address);
/* Find the flag for this endpoint (for use in the control context). Use the
* endpoint index to create a bitmask. The slot context is bit 0, endpoint 0 is
@@ -4313,10 +4314,11 @@ static int xhci_setup_device(struct usb_hcd *hcd, struct usb_device *udev,
return ret;
}
-static int xhci_address_device(struct usb_hcd *hcd, struct usb_device *udev)
+int xhci_address_device(struct usb_hcd *hcd, struct usb_device *udev)
{
return xhci_setup_device(hcd, udev, SETUP_CONTEXT_ADDRESS);
}
+EXPORT_SYMBOL_GPL(xhci_address_device);
static int xhci_enable_device(struct usb_hcd *hcd, struct usb_device *udev)
{
--
2.31.1
^ permalink raw reply related [flat|nested] 9+ messages in thread* [PATCH v2 2/4] usb: host: add xhci hooks for USB offload
2022-03-07 10:17 ` [PATCH v2 0/4] support USB offload feature Daehwan Jung
2022-03-07 10:17 ` [PATCH v2 1/4] usb: host: export symbols for xhci hooks usage Daehwan Jung
@ 2022-03-07 10:17 ` Daehwan Jung
2022-03-07 10:17 ` [PATCH v2 3/4] usb: host: add some to xhci overrides " Daehwan Jung
2022-03-07 10:17 ` [PATCH v2 4/4] usb: host: add xhci-exynos module Daehwan Jung
3 siblings, 0 replies; 9+ messages in thread
From: Daehwan Jung @ 2022-03-07 10:17 UTC (permalink / raw)
To: Mathias Nyman, Greg Kroah-Hartman
Cc: open list:USB XHCI DRIVER, open list, Howard Yen, Jack Pham,
Puma Hsu, J . Avila, Daehwan Jung, sc.suh, cpgs, cpgsproxy5
To enable supporting for USB offload, define "offload" in usb controller
node of device tree. "offload" value can be used to determine which type
of offload was been enabled in the SoC.
For example:
&usbdrd_dwc3 {
...
/* support usb offloading, 0: disabled, 1: audio */
offload = <1>;
...
};
There are several vendor_ops introduced by this patch:
struct xhci_vendor_ops - function callbacks for vendor specific operations
{
@vendor_init:
- called for vendor init process during xhci-plat-hcd
probe.
@vendor_cleanup:
- called for vendor cleanup process during xhci-plat-hcd
remove.
@is_usb_offload_enabled:
- called to check if usb offload enabled.
@queue_irq_work:
- called to queue vendor specific irq work.
@alloc_dcbaa:
- called when allocating vendor specific dcbaa during
memory initializtion.
@free_dcbaa:
- called to free vendor specific dcbaa when cleanup the
memory.
@alloc_transfer_ring:
- called when vendor specific transfer ring allocation is required
@free_transfer_ring:
- called to free vendor specific transfer ring
@sync_dev_ctx:
- called when synchronization for device context is required
@alloc_container_ctx
- called when allocating vendor specific container context
@free_container_ctx:
- called to free vendor specific container context
}
The xhci hooks with prefix "xhci_vendor_" on the ops in xhci_vendor_ops.
For example, vendor_init ops will be invoked by xhci_vendor_init() hook,
is_usb_offload_enabled ops will be invoked by
xhci_vendor_is_usb_offload_enabled(), and so on.
Signed-off-by: Daehwan Jung <dh10.jung@samsung.com>
Signed-off-by: J. Avila <elavila@google.com>
Signed-off-by: Puma Hsu <pumahsu@google.com>
Signed-off-by: Howard Yen <howardyen@google.com>
---
drivers/usb/host/xhci-hub.c | 5 ++
drivers/usb/host/xhci-mem.c | 131 +++++++++++++++++++++++++++++++----
drivers/usb/host/xhci-plat.c | 43 +++++++++++-
drivers/usb/host/xhci-plat.h | 8 +++
drivers/usb/host/xhci-ring.c | 13 ++++
drivers/usb/host/xhci.c | 94 ++++++++++++++++++++++++-
drivers/usb/host/xhci.h | 50 +++++++++++++
7 files changed, 327 insertions(+), 17 deletions(-)
diff --git a/drivers/usb/host/xhci-hub.c b/drivers/usb/host/xhci-hub.c
index 56546aaa93c7..aea72ffce820 100644
--- a/drivers/usb/host/xhci-hub.c
+++ b/drivers/usb/host/xhci-hub.c
@@ -535,8 +535,13 @@ static int xhci_stop_device(struct xhci_hcd *xhci, int slot_id, int suspend)
cmd->status == COMP_COMMAND_RING_STOPPED) {
xhci_warn(xhci, "Timeout while waiting for stop endpoint command\n");
ret = -ETIME;
+ goto cmd_cleanup;
}
+ ret = xhci_vendor_sync_dev_ctx(xhci, slot_id);
+ if (ret)
+ xhci_warn(xhci, "Sync device context failed, ret=%d\n", ret);
+
cmd_cleanup:
xhci_free_command(xhci, cmd);
return ret;
diff --git a/drivers/usb/host/xhci-mem.c b/drivers/usb/host/xhci-mem.c
index 45be6732eb89..ef531007fd50 100644
--- a/drivers/usb/host/xhci-mem.c
+++ b/drivers/usb/host/xhci-mem.c
@@ -367,6 +367,54 @@ static int xhci_alloc_segments_for_ring(struct xhci_hcd *xhci,
return 0;
}
+static void xhci_vendor_free_container_ctx(struct xhci_hcd *xhci, struct xhci_container_ctx *ctx)
+{
+ struct xhci_vendor_ops *ops = xhci_vendor_get_ops(xhci);
+
+ if (ops && ops->free_container_ctx)
+ ops->free_container_ctx(xhci, ctx);
+}
+
+static void xhci_vendor_alloc_container_ctx(struct xhci_hcd *xhci, struct xhci_container_ctx *ctx,
+ int type, gfp_t flags)
+{
+ struct xhci_vendor_ops *ops = xhci_vendor_get_ops(xhci);
+
+ if (ops && ops->alloc_container_ctx)
+ ops->alloc_container_ctx(xhci, ctx, type, flags);
+}
+
+static struct xhci_ring *xhci_vendor_alloc_transfer_ring(struct xhci_hcd *xhci,
+ u32 endpoint_type, enum xhci_ring_type ring_type,
+ unsigned int max_packet, gfp_t mem_flags)
+{
+ struct xhci_vendor_ops *ops = xhci_vendor_get_ops(xhci);
+
+ if (ops && ops->alloc_transfer_ring)
+ return ops->alloc_transfer_ring(xhci, endpoint_type, ring_type,
+ max_packet, mem_flags);
+ return 0;
+}
+
+void xhci_vendor_free_transfer_ring(struct xhci_hcd *xhci,
+ struct xhci_ring *ring, unsigned int ep_index)
+{
+ struct xhci_vendor_ops *ops = xhci_vendor_get_ops(xhci);
+
+ if (ops && ops->free_transfer_ring)
+ ops->free_transfer_ring(xhci, ring, ep_index);
+}
+
+bool xhci_vendor_is_usb_offload_enabled(struct xhci_hcd *xhci,
+ struct xhci_virt_device *virt_dev, unsigned int ep_index)
+{
+ struct xhci_vendor_ops *ops = xhci_vendor_get_ops(xhci);
+
+ if (ops && ops->is_usb_offload_enabled)
+ return ops->is_usb_offload_enabled(xhci, virt_dev, ep_index);
+ return false;
+}
+
/*
* Create a new ring with zero or more segments.
*
@@ -419,7 +467,11 @@ void xhci_free_endpoint_ring(struct xhci_hcd *xhci,
struct xhci_virt_device *virt_dev,
unsigned int ep_index)
{
- xhci_ring_free(xhci, virt_dev->eps[ep_index].ring);
+ if (xhci_vendor_is_usb_offload_enabled(xhci, virt_dev, ep_index))
+ xhci_vendor_free_transfer_ring(xhci, virt_dev->eps[ep_index].ring, ep_index);
+ else
+ xhci_ring_free(xhci, virt_dev->eps[ep_index].ring);
+
virt_dev->eps[ep_index].ring = NULL;
}
@@ -477,6 +529,7 @@ struct xhci_container_ctx *xhci_alloc_container_ctx(struct xhci_hcd *xhci,
{
struct xhci_container_ctx *ctx;
struct device *dev = xhci_to_hcd(xhci)->self.sysdev;
+ struct xhci_vendor_ops *ops = xhci_vendor_get_ops(xhci);
if ((type != XHCI_CTX_TYPE_DEVICE) && (type != XHCI_CTX_TYPE_INPUT))
return NULL;
@@ -490,7 +543,12 @@ struct xhci_container_ctx *xhci_alloc_container_ctx(struct xhci_hcd *xhci,
if (type == XHCI_CTX_TYPE_INPUT)
ctx->size += CTX_SIZE(xhci->hcc_params);
- ctx->bytes = dma_pool_zalloc(xhci->device_pool, flags, &ctx->dma);
+ if (xhci_vendor_is_usb_offload_enabled(xhci, NULL, 0) &&
+ (ops && ops->alloc_container_ctx))
+ xhci_vendor_alloc_container_ctx(xhci, ctx, type, flags);
+ else
+ ctx->bytes = dma_pool_zalloc(xhci->device_pool, flags, &ctx->dma);
+
if (!ctx->bytes) {
kfree(ctx);
return NULL;
@@ -501,9 +559,16 @@ struct xhci_container_ctx *xhci_alloc_container_ctx(struct xhci_hcd *xhci,
void xhci_free_container_ctx(struct xhci_hcd *xhci,
struct xhci_container_ctx *ctx)
{
+ struct xhci_vendor_ops *ops = xhci_vendor_get_ops(xhci);
+
if (!ctx)
return;
- dma_pool_free(xhci->device_pool, ctx->bytes, ctx->dma);
+ if (xhci_vendor_is_usb_offload_enabled(xhci, NULL, 0) &&
+ (ops && ops->free_container_ctx))
+ xhci_vendor_free_container_ctx(xhci, ctx);
+ else
+ dma_pool_free(xhci->device_pool, ctx->bytes, ctx->dma);
+
kfree(ctx);
}
@@ -896,7 +961,7 @@ void xhci_free_virt_device(struct xhci_hcd *xhci, int slot_id)
for (i = 0; i < 31; i++) {
if (dev->eps[i].ring)
- xhci_ring_free(xhci, dev->eps[i].ring);
+ xhci_free_endpoint_ring(xhci, dev, i);
if (dev->eps[i].stream_info)
xhci_free_stream_info(xhci,
dev->eps[i].stream_info);
@@ -1494,8 +1559,16 @@ int xhci_endpoint_init(struct xhci_hcd *xhci,
mult = 0;
/* Set up the endpoint ring */
- virt_dev->eps[ep_index].new_ring =
- xhci_ring_alloc(xhci, 2, 1, ring_type, max_packet, mem_flags);
+ if (xhci_vendor_is_usb_offload_enabled(xhci, virt_dev, ep_index) &&
+ usb_endpoint_xfer_isoc(&ep->desc)) {
+ virt_dev->eps[ep_index].new_ring =
+ xhci_vendor_alloc_transfer_ring(xhci, endpoint_type, ring_type,
+ max_packet, mem_flags);
+ } else {
+ virt_dev->eps[ep_index].new_ring =
+ xhci_ring_alloc(xhci, 2, 1, ring_type, max_packet, mem_flags);
+ }
+
if (!virt_dev->eps[ep_index].new_ring)
return -ENOMEM;
@@ -1843,6 +1916,24 @@ void xhci_free_erst(struct xhci_hcd *xhci, struct xhci_erst *erst)
}
EXPORT_SYMBOL_GPL(xhci_free_erst);
+static struct xhci_device_context_array *xhci_vendor_alloc_dcbaa(
+ struct xhci_hcd *xhci, gfp_t flags)
+{
+ struct xhci_vendor_ops *ops = xhci_vendor_get_ops(xhci);
+
+ if (ops && ops->alloc_dcbaa)
+ return ops->alloc_dcbaa(xhci, flags);
+ return 0;
+}
+
+static void xhci_vendor_free_dcbaa(struct xhci_hcd *xhci)
+{
+ struct xhci_vendor_ops *ops = xhci_vendor_get_ops(xhci);
+
+ if (ops && ops->free_dcbaa)
+ ops->free_dcbaa(xhci);
+}
+
void xhci_mem_cleanup(struct xhci_hcd *xhci)
{
struct device *dev = xhci_to_hcd(xhci)->self.sysdev;
@@ -1894,9 +1985,13 @@ void xhci_mem_cleanup(struct xhci_hcd *xhci)
xhci_dbg_trace(xhci, trace_xhci_dbg_init,
"Freed medium stream array pool");
- if (xhci->dcbaa)
- dma_free_coherent(dev, sizeof(*xhci->dcbaa),
- xhci->dcbaa, xhci->dcbaa->dma);
+ if (xhci_vendor_is_usb_offload_enabled(xhci, NULL, 0)) {
+ xhci_vendor_free_dcbaa(xhci);
+ } else {
+ if (xhci->dcbaa)
+ dma_free_coherent(dev, sizeof(*xhci->dcbaa),
+ xhci->dcbaa, xhci->dcbaa->dma);
+ }
xhci->dcbaa = NULL;
scratchpad_free(xhci);
@@ -2433,15 +2528,21 @@ int xhci_mem_init(struct xhci_hcd *xhci, gfp_t flags)
* xHCI section 5.4.6 - Device Context array must be
* "physically contiguous and 64-byte (cache line) aligned".
*/
- xhci->dcbaa = dma_alloc_coherent(dev, sizeof(*xhci->dcbaa), &dma,
- flags);
- if (!xhci->dcbaa)
- goto fail;
- xhci->dcbaa->dma = dma;
+ if (xhci_vendor_is_usb_offload_enabled(xhci, NULL, 0)) {
+ xhci->dcbaa = xhci_vendor_alloc_dcbaa(xhci, flags);
+ if (!xhci->dcbaa)
+ goto fail;
+ } else {
+ xhci->dcbaa = dma_alloc_coherent(dev, sizeof(*xhci->dcbaa), &dma,
+ flags);
+ if (!xhci->dcbaa)
+ goto fail;
+ xhci->dcbaa->dma = dma;
+ }
xhci_dbg_trace(xhci, trace_xhci_dbg_init,
"// Device context base array address = 0x%llx (DMA), %p (virt)",
(unsigned long long)xhci->dcbaa->dma, xhci->dcbaa);
- xhci_write_64(xhci, dma, &xhci->op_regs->dcbaa_ptr);
+ xhci_write_64(xhci, xhci->dcbaa->dma, &xhci->op_regs->dcbaa_ptr);
/*
* Initialize the ring segment pool. The ring must be a contiguous
diff --git a/drivers/usb/host/xhci-plat.c b/drivers/usb/host/xhci-plat.c
index 649ffd861b44..3d2fe4d77f38 100644
--- a/drivers/usb/host/xhci-plat.c
+++ b/drivers/usb/host/xhci-plat.c
@@ -173,6 +173,41 @@ static const struct of_device_id usb_xhci_of_match[] = {
MODULE_DEVICE_TABLE(of, usb_xhci_of_match);
#endif
+static struct xhci_plat_priv_overwrite xhci_plat_vendor_overwrite;
+
+int xhci_plat_register_vendor_ops(struct xhci_vendor_ops *vendor_ops)
+{
+ if (vendor_ops == NULL)
+ return -EINVAL;
+
+ xhci_plat_vendor_overwrite.vendor_ops = vendor_ops;
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(xhci_plat_register_vendor_ops);
+
+static int xhci_vendor_init(struct xhci_hcd *xhci)
+{
+ struct xhci_vendor_ops *ops = NULL;
+
+ if (xhci_plat_vendor_overwrite.vendor_ops)
+ ops = xhci->vendor_ops = xhci_plat_vendor_overwrite.vendor_ops;
+
+ if (ops && ops->vendor_init)
+ return ops->vendor_init(xhci);
+ return 0;
+}
+
+static void xhci_vendor_cleanup(struct xhci_hcd *xhci)
+{
+ struct xhci_vendor_ops *ops = xhci_vendor_get_ops(xhci);
+
+ if (ops && ops->vendor_cleanup)
+ ops->vendor_cleanup(xhci);
+
+ xhci->vendor_ops = NULL;
+}
+
static int xhci_plat_probe(struct platform_device *pdev)
{
const struct xhci_plat_priv *priv_match;
@@ -321,6 +356,10 @@ static int xhci_plat_probe(struct platform_device *pdev)
goto put_usb3_hcd;
}
+ ret = xhci_vendor_init(xhci);
+ if (ret)
+ goto disable_usb_phy;
+
hcd->tpl_support = of_usb_host_tpl_support(sysdev->of_node);
xhci->shared_hcd->tpl_support = hcd->tpl_support;
if (priv && (priv->quirks & XHCI_SKIP_PHY_INIT))
@@ -393,8 +432,10 @@ static int xhci_plat_remove(struct platform_device *dev)
usb_phy_shutdown(hcd->usb_phy);
usb_remove_hcd(hcd);
- usb_put_hcd(shared_hcd);
+ xhci_vendor_cleanup(xhci);
+
+ usb_put_hcd(shared_hcd);
clk_disable_unprepare(clk);
clk_disable_unprepare(reg_clk);
usb_put_hcd(hcd);
diff --git a/drivers/usb/host/xhci-plat.h b/drivers/usb/host/xhci-plat.h
index 1fb149d1fbce..658589bbf2da 100644
--- a/drivers/usb/host/xhci-plat.h
+++ b/drivers/usb/host/xhci-plat.h
@@ -13,6 +13,7 @@
struct xhci_plat_priv {
const char *firmware_name;
unsigned long long quirks;
+ struct xhci_vendor_data *vendor_data;
void (*plat_start)(struct usb_hcd *);
int (*init_quirk)(struct usb_hcd *);
int (*suspend_quirk)(struct usb_hcd *);
@@ -21,4 +22,11 @@ struct xhci_plat_priv {
#define hcd_to_xhci_priv(h) ((struct xhci_plat_priv *)hcd_to_xhci(h)->priv)
#define xhci_to_priv(x) ((struct xhci_plat_priv *)(x)->priv)
+
+struct xhci_plat_priv_overwrite {
+ struct xhci_vendor_ops *vendor_ops;
+};
+
+int xhci_plat_register_vendor_ops(struct xhci_vendor_ops *vendor_ops);
+
#endif /* _XHCI_PLAT_H */
diff --git a/drivers/usb/host/xhci-ring.c b/drivers/usb/host/xhci-ring.c
index 2e99393560e5..e611f8d7d587 100644
--- a/drivers/usb/host/xhci-ring.c
+++ b/drivers/usb/host/xhci-ring.c
@@ -3075,6 +3075,15 @@ void xhci_update_erst_dequeue(struct xhci_hcd *xhci,
}
EXPORT_SYMBOL_GPL(xhci_update_erst_dequeue);
+static irqreturn_t xhci_vendor_queue_irq_work(struct xhci_hcd *xhci)
+{
+ struct xhci_vendor_ops *ops = xhci_vendor_get_ops(xhci);
+
+ if (ops && ops->queue_irq_work)
+ return ops->queue_irq_work(xhci);
+ return IRQ_NONE;
+}
+
/*
* xHCI spec says we can get an interrupt, and if the HC has an error condition,
* we might get bad data out of the event ring. Section 4.10.2.7 has a list of
@@ -3108,6 +3117,10 @@ irqreturn_t xhci_irq(struct usb_hcd *hcd)
goto out;
}
+ ret = xhci_vendor_queue_irq_work(xhci);
+ if (ret == IRQ_HANDLED)
+ goto out;
+
/*
* Clear the op reg interrupt status first,
* so we can receive interrupts from other MSI-X interrupters.
diff --git a/drivers/usb/host/xhci.c b/drivers/usb/host/xhci.c
index 8f53672dcd97..3f82df2c5be1 100644
--- a/drivers/usb/host/xhci.c
+++ b/drivers/usb/host/xhci.c
@@ -1632,6 +1632,11 @@ static int xhci_urb_enqueue(struct usb_hcd *hcd, struct urb *urb, gfp_t mem_flag
return -ENODEV;
}
+ if (xhci_vendor_usb_offload_skip_urb(xhci, urb)) {
+ xhci_dbg(xhci, "skip urb for usb offload\n");
+ return -EOPNOTSUPP;
+ }
+
if (usb_endpoint_xfer_isoc(&urb->ep->desc))
num_tds = urb->number_of_packets;
else if (usb_endpoint_is_bulk_out(&urb->ep->desc) &&
@@ -2975,6 +2980,14 @@ static int xhci_configure_endpoint(struct xhci_hcd *xhci,
xhci_finish_resource_reservation(xhci, ctrl_ctx);
spin_unlock_irqrestore(&xhci->lock, flags);
}
+ if (ret)
+ goto failed;
+
+ ret = xhci_vendor_sync_dev_ctx(xhci, udev->slot_id);
+ if (ret)
+ xhci_warn(xhci, "sync device context failed, ret=%d", ret);
+
+failed:
return ret;
}
@@ -3118,7 +3131,11 @@ void xhci_reset_bandwidth(struct usb_hcd *hcd, struct usb_device *udev)
for (i = 0; i < 31; i++) {
if (virt_dev->eps[i].new_ring) {
xhci_debugfs_remove_endpoint(xhci, virt_dev, i);
- xhci_ring_free(xhci, virt_dev->eps[i].new_ring);
+ if (xhci_vendor_is_usb_offload_enabled(xhci, virt_dev, i))
+ xhci_vendor_free_transfer_ring(xhci, virt_dev->eps[i].new_ring, i);
+ else
+ xhci_ring_free(xhci, virt_dev->eps[i].new_ring);
+
virt_dev->eps[i].new_ring = NULL;
}
}
@@ -3279,6 +3296,13 @@ static void xhci_endpoint_reset(struct usb_hcd *hcd,
wait_for_completion(stop_cmd->completion);
+ err = xhci_vendor_sync_dev_ctx(xhci, udev->slot_id);
+ if (err) {
+ xhci_warn(xhci, "%s: Failed to sync device context failed, err=%d",
+ __func__, err);
+ goto cleanup;
+ }
+
spin_lock_irqsave(&xhci->lock, flags);
/* config ep command clears toggle if add and drop ep flags are set */
@@ -3310,6 +3334,11 @@ static void xhci_endpoint_reset(struct usb_hcd *hcd,
wait_for_completion(cfg_cmd->completion);
+ err = xhci_vendor_sync_dev_ctx(xhci, udev->slot_id);
+ if (err)
+ xhci_warn(xhci, "%s: Failed to sync device context failed, err=%d",
+ __func__, err);
+
xhci_free_command(xhci, cfg_cmd);
cleanup:
xhci_free_command(xhci, stop_cmd);
@@ -3855,6 +3884,13 @@ static int xhci_discover_or_reset_device(struct usb_hcd *hcd,
/* Wait for the Reset Device command to finish */
wait_for_completion(reset_device_cmd->completion);
+ ret = xhci_vendor_sync_dev_ctx(xhci, slot_id);
+ if (ret) {
+ xhci_warn(xhci, "%s: Failed to sync device context failed, err=%d",
+ __func__, ret);
+ goto command_cleanup;
+ }
+
/* The Reset Device command can't fail, according to the 0.95/0.96 spec,
* unless we tried to reset a slot ID that wasn't enabled,
* or the device wasn't in the addressed or configured state.
@@ -4100,6 +4136,14 @@ int xhci_alloc_dev(struct usb_hcd *hcd, struct usb_device *udev)
xhci_warn(xhci, "Could not allocate xHCI USB device data structures\n");
goto disable_slot;
}
+
+ ret = xhci_vendor_sync_dev_ctx(xhci, slot_id);
+ if (ret) {
+ xhci_warn(xhci, "%s: Failed to sync device context failed, err=%d",
+ __func__, ret);
+ goto disable_slot;
+ }
+
vdev = xhci->devs[slot_id];
slot_ctx = xhci_get_slot_ctx(xhci, vdev->out_ctx);
trace_xhci_alloc_dev(slot_ctx);
@@ -4230,6 +4274,13 @@ static int xhci_setup_device(struct usb_hcd *hcd, struct usb_device *udev,
/* ctrl tx can take up to 5 sec; XXX: need more time for xHC? */
wait_for_completion(command->completion);
+ ret = xhci_vendor_sync_dev_ctx(xhci, udev->slot_id);
+ if (ret) {
+ xhci_warn(xhci, "%s: Failed to sync device context failed, err=%d",
+ __func__, ret);
+ goto out;
+ }
+
/* FIXME: From section 4.3.4: "Software shall be responsible for timing
* the SetAddress() "recovery interval" required by USB and aborting the
* command on a timeout.
@@ -4382,6 +4433,14 @@ static int __maybe_unused xhci_change_max_exit_latency(struct xhci_hcd *xhci,
return -ENOMEM;
}
+ ret = xhci_vendor_sync_dev_ctx(xhci, udev->slot_id);
+ if (ret) {
+ spin_unlock_irqrestore(&xhci->lock, flags);
+ xhci_warn(xhci, "%s: Failed to sync device context failed, err=%d",
+ __func__, ret);
+ return ret;
+ }
+
xhci_slot_copy(xhci, command->in_ctx, virt_dev->out_ctx);
spin_unlock_irqrestore(&xhci->lock, flags);
@@ -4409,6 +4468,30 @@ static int __maybe_unused xhci_change_max_exit_latency(struct xhci_hcd *xhci,
return ret;
}
+struct xhci_vendor_ops *xhci_vendor_get_ops(struct xhci_hcd *xhci)
+{
+ return xhci->vendor_ops;
+}
+EXPORT_SYMBOL_GPL(xhci_vendor_get_ops);
+
+int xhci_vendor_sync_dev_ctx(struct xhci_hcd *xhci, unsigned int slot_id)
+{
+ struct xhci_vendor_ops *ops = xhci_vendor_get_ops(xhci);
+
+ if (ops && ops->sync_dev_ctx)
+ return ops->sync_dev_ctx(xhci, slot_id);
+ return 0;
+}
+
+bool xhci_vendor_usb_offload_skip_urb(struct xhci_hcd *xhci, struct urb *urb)
+{
+ struct xhci_vendor_ops *ops = xhci_vendor_get_ops(xhci);
+
+ if (ops && ops->usb_offload_skip_urb)
+ return ops->usb_offload_skip_urb(xhci, urb);
+ return false;
+}
+
#ifdef CONFIG_PM
/* BESL to HIRD Encoding array for USB2 LPM */
@@ -5133,6 +5216,15 @@ static int xhci_update_hub_device(struct usb_hcd *hcd, struct usb_device *hdev,
return -ENOMEM;
}
+ ret = xhci_vendor_sync_dev_ctx(xhci, hdev->slot_id);
+ if (ret) {
+ xhci_warn(xhci, "%s: Failed to sync device context failed, err=%d",
+ __func__, ret);
+ xhci_free_command(xhci, config_cmd);
+ spin_unlock_irqrestore(&xhci->lock, flags);
+ return ret;
+ }
+
xhci_slot_copy(xhci, config_cmd->in_ctx, vdev->out_ctx);
ctrl_ctx->add_flags |= cpu_to_le32(SLOT_FLAG);
slot_ctx = xhci_get_slot_ctx(xhci, config_cmd->in_ctx);
diff --git a/drivers/usb/host/xhci.h b/drivers/usb/host/xhci.h
index 473a33ce299e..e2ed4f88ae4b 100644
--- a/drivers/usb/host/xhci.h
+++ b/drivers/usb/host/xhci.h
@@ -1929,6 +1929,9 @@ struct xhci_hcd {
struct list_head regset_list;
void *dbc;
+
+ struct xhci_vendor_ops *vendor_ops;
+
/* platform-specific data -- must come last */
unsigned long priv[] __aligned(sizeof(s64));
};
@@ -2207,6 +2210,53 @@ static inline struct xhci_ring *xhci_urb_to_transfer_ring(struct xhci_hcd *xhci,
urb->stream_id);
}
+/**
+ * struct xhci_vendor_ops - function callbacks for vendor specific operations
+ * @vendor_init: called for vendor init process
+ * @vendor_cleanup: called for vendor cleanup process
+ * @is_usb_offload_enabled: called to check if usb offload enabled
+ * @queue_irq_work: called to queue vendor specific irq work
+ * @alloc_dcbaa: called when allocating vendor specific dcbaa
+ * @free_dcbaa: called to free vendor specific dcbaa
+ * @alloc_transfer_ring: called when remote transfer ring allocation is required
+ * @free_transfer_ring: called to free vendor specific transfer ring
+ * @sync_dev_ctx: called when synchronization for device context is required
+ * @alloc_container_ctx: called when allocating vendor specific container context
+ * @free_container_ctx: called to free vendor specific container context
+ */
+struct xhci_vendor_ops {
+ int (*vendor_init)(struct xhci_hcd *xhci);
+ void (*vendor_cleanup)(struct xhci_hcd *xhci);
+ bool (*is_usb_offload_enabled)(struct xhci_hcd *xhci,
+ struct xhci_virt_device *vdev,
+ unsigned int ep_index);
+ irqreturn_t (*queue_irq_work)(struct xhci_hcd *xhci);
+
+ struct xhci_device_context_array *(*alloc_dcbaa)(struct xhci_hcd *xhci,
+ gfp_t flags);
+ void (*free_dcbaa)(struct xhci_hcd *xhci);
+
+ struct xhci_ring *(*alloc_transfer_ring)(struct xhci_hcd *xhci,
+ u32 endpoint_type, enum xhci_ring_type ring_type,
+ unsigned int max_packet, gfp_t mem_flags);
+ void (*free_transfer_ring)(struct xhci_hcd *xhci,
+ struct xhci_ring *ring, unsigned int ep_index);
+ int (*sync_dev_ctx)(struct xhci_hcd *xhci, unsigned int slot_id);
+ bool (*usb_offload_skip_urb)(struct xhci_hcd *xhci, struct urb *urb);
+ void (*alloc_container_ctx)(struct xhci_hcd *xhci, struct xhci_container_ctx *ctx,
+ int type, gfp_t flags);
+ void (*free_container_ctx)(struct xhci_hcd *xhci, struct xhci_container_ctx *ctx);
+};
+
+struct xhci_vendor_ops *xhci_vendor_get_ops(struct xhci_hcd *xhci);
+
+int xhci_vendor_sync_dev_ctx(struct xhci_hcd *xhci, unsigned int slot_id);
+bool xhci_vendor_usb_offload_skip_urb(struct xhci_hcd *xhci, struct urb *urb);
+void xhci_vendor_free_transfer_ring(struct xhci_hcd *xhci,
+ struct xhci_ring *ring, unsigned int ep_index);
+bool xhci_vendor_is_usb_offload_enabled(struct xhci_hcd *xhci,
+ struct xhci_virt_device *virt_dev, unsigned int ep_index);
+
/*
* TODO: As per spec Isochronous IDT transmissions are supported. We bypass
* them anyways as we where unable to find a device that matches the
--
2.31.1
^ permalink raw reply related [flat|nested] 9+ messages in thread* [PATCH v2 4/4] usb: host: add xhci-exynos module
2022-03-07 10:17 ` [PATCH v2 0/4] support USB offload feature Daehwan Jung
` (2 preceding siblings ...)
2022-03-07 10:17 ` [PATCH v2 3/4] usb: host: add some to xhci overrides " Daehwan Jung
@ 2022-03-07 10:17 ` Daehwan Jung
2022-03-07 10:31 ` Greg Kroah-Hartman
` (2 more replies)
3 siblings, 3 replies; 9+ messages in thread
From: Daehwan Jung @ 2022-03-07 10:17 UTC (permalink / raw)
To: Mathias Nyman, Greg Kroah-Hartman
Cc: open list:USB XHCI DRIVER, open list, Howard Yen, Jack Pham,
Puma Hsu, J . Avila, Daehwan Jung, sc.suh, cpgs, cpgsproxy5
This is for reference to introduce usb offload as seeing how a user does.
We only care DCBAA, Device Context, Transfer Ring, Event Ring, and ERST.
They are allocated on specific address(SRAM) for Co-Processor.
Co-processor could use them directly without xhci driver after then.
Signed-off-by: Daehwan Jung <dh10.jung@samsung.com>
---
drivers/usb/host/xhci-exynos.c | 2025 ++++++++++++++++++++++++++++++++
drivers/usb/host/xhci-exynos.h | 150 +++
2 files changed, 2175 insertions(+)
create mode 100644 drivers/usb/host/xhci-exynos.c
create mode 100644 drivers/usb/host/xhci-exynos.h
diff --git a/drivers/usb/host/xhci-exynos.c b/drivers/usb/host/xhci-exynos.c
new file mode 100644
index 000000000000..3913c48d4b20
--- /dev/null
+++ b/drivers/usb/host/xhci-exynos.c
@@ -0,0 +1,2025 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * xhci-exynos.c - xHCI host controller driver platform Bus Glue for Exynos.
+ *
+ * Copyright (C) 2022 Samsung Electronics Incorporated - http://www.samsung.com
+ * Author: Daehwan Jung <dh10.jung@samsung.com>
+ *
+ * A lot of code borrowed from the Linux xHCI driver.
+ */
+
+#include <linux/clk.h>
+#include <linux/dma-mapping.h>
+#include <linux/module.h>
+#include <linux/pci.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/platform_device.h>
+#include <linux/usb/phy.h>
+#include <linux/slab.h>
+#include <linux/phy/phy.h>
+#include <linux/acpi.h>
+#include <linux/usb/of.h>
+#ifdef CONFIG_SND_EXYNOS_USB_AUDIO
+#include "../../../sound/usb/exynos_usb_audio.h"
+#include <linux/types.h>
+#include "xhci-trace.h"
+#endif
+
+#include "../core/hub.h"
+#include "../core/phy.h"
+#include "xhci.h"
+#include "xhci-plat.h"
+#include "xhci-mvebu.h"
+#include "xhci-rcar.h"
+#include "../dwc3/dwc3-exynos.h"
+#include "../dwc3/exynos-otg.h"
+#include "xhci-exynos.h"
+#include <soc/samsung/exynos-cpupm.h>
+
+static struct hc_driver __read_mostly xhci_exynos_hc_driver;
+
+static int xhci_exynos_setup(struct usb_hcd *hcd);
+static int xhci_exynos_start(struct usb_hcd *hcd);
+static int xhci_exynos_bus_suspend(struct usb_hcd *hcd);
+static int xhci_exynos_bus_resume(struct usb_hcd *hcd);
+static int xhci_exynos_wake_lock(struct xhci_hcd_exynos *xhci_exynos,
+ int is_main_hcd, int is_lock);
+
+static int is_rewa_enabled;
+
+static struct xhci_hcd_exynos *g_xhci_exynos;
+#ifdef CONFIG_SND_EXYNOS_USB_AUDIO
+extern struct usb_xhci_pre_alloc xhci_pre_alloc;
+
+struct xhci_ring *xhci_ring_alloc_uram(struct xhci_hcd *xhci,
+ unsigned int num_segs, unsigned int cycle_state,
+ enum xhci_ring_type type, unsigned int max_packet, gfp_t flags,
+ u32 endpoint_type);
+
+static void *dma_pre_alloc_coherent(struct xhci_hcd *xhci, size_t size,
+ dma_addr_t *dma_handle, gfp_t gfp)
+{
+ struct usb_xhci_pre_alloc *xhci_alloc = g_xhci_exynos->xhci_alloc;
+ u64 align = size % PAGE_SIZE;
+ u64 b_offset = xhci_alloc->offset;
+
+ if (align)
+ xhci_alloc->offset = xhci_alloc->offset + size + (PAGE_SIZE - align);
+ else
+ xhci_alloc->offset = xhci_alloc->offset + size;
+
+ *dma_handle = xhci_alloc->dma + b_offset;
+
+ return (void *)xhci_alloc->pre_dma_alloc + b_offset;
+}
+
+static void xhci_exynos_usb_offload_enable_event_ring(struct xhci_hcd *xhci)
+{
+ u32 temp;
+ u64 temp_64;
+
+ temp_64 = xhci_read_64(xhci, &g_xhci_exynos->ir_set_audio->erst_dequeue);
+ temp_64 &= ~ERST_PTR_MASK;
+ xhci_info(xhci, "ERST2 deq = 64'h%0lx", (unsigned long) temp_64);
+
+ xhci_info(xhci, "// [USB Audio] Set the interrupt modulation register");
+ temp = readl(&g_xhci_exynos->ir_set_audio->irq_control);
+ temp &= ~ER_IRQ_INTERVAL_MASK;
+
+ temp |= (u32)160;
+ writel(temp, &g_xhci_exynos->ir_set_audio->irq_control);
+
+ temp = readl(&g_xhci_exynos->ir_set_audio->irq_pending);
+ xhci_info(xhci, "// [USB Audio] Enabling event ring interrupter %p by writing 0x%x to irq_pending",
+ g_xhci_exynos->ir_set_audio, (unsigned int) ER_IRQ_ENABLE(temp));
+ writel(ER_IRQ_ENABLE(temp), &g_xhci_exynos->ir_set_audio->irq_pending);
+}
+
+static void xhci_exynos_usb_offload_store_hw_info(struct xhci_hcd *xhci, struct usb_hcd *hcd,
+ struct usb_device *udev)
+{
+ struct xhci_virt_device *virt_dev;
+ struct xhci_erst_entry *entry = &g_xhci_exynos->erst_audio.entries[0];
+
+ virt_dev = xhci->devs[udev->slot_id];
+
+ g_hwinfo->dcbaa_dma = xhci->dcbaa->dma;
+ g_hwinfo->save_dma = g_xhci_exynos->save_dma;
+ g_hwinfo->cmd_ring = xhci->op_regs->cmd_ring;
+ g_hwinfo->slot_id = udev->slot_id;
+ g_hwinfo->in_dma = g_xhci_exynos->in_dma;
+ g_hwinfo->in_buf = g_xhci_exynos->in_addr;
+ g_hwinfo->out_dma = g_xhci_exynos->out_dma;
+ g_hwinfo->out_buf = g_xhci_exynos->out_addr;
+ g_hwinfo->in_ctx = virt_dev->in_ctx->dma;
+ g_hwinfo->out_ctx = virt_dev->out_ctx->dma;
+ g_hwinfo->erst_addr = entry->seg_addr;
+ g_hwinfo->speed = udev->speed;
+ if (xhci->quirks & XHCI_USE_URAM_FOR_EXYNOS_AUDIO)
+ g_hwinfo->use_uram = true;
+ else
+ g_hwinfo->use_uram = false;
+
+ pr_info("<<< %s\n", __func__);
+}
+static void xhci_exynos_set_hc_event_deq_audio(struct xhci_hcd *xhci)
+{
+ u64 temp;
+ dma_addr_t deq;
+
+ deq = xhci_trb_virt_to_dma(g_xhci_exynos->event_ring_audio->deq_seg,
+ g_xhci_exynos->event_ring_audio->dequeue);
+ if (deq == 0 && !in_interrupt())
+ xhci_warn(xhci, "WARN something wrong with SW event ring "
+ "dequeue ptr.\n");
+ /* Update HC event ring dequeue pointer */
+ temp = xhci_read_64(xhci, &g_xhci_exynos->ir_set_audio->erst_dequeue);
+ temp &= ERST_PTR_MASK;
+ /* Don't clear the EHB bit (which is RW1C) because
+ * there might be more events to service.
+ */
+ temp &= ~ERST_EHB;
+ xhci_info(xhci, "//[%s] Write event ring dequeue pointer = 0x%llx, "
+ "preserving EHB bit", __func__,
+ ((u64) deq & (u64) ~ERST_PTR_MASK) | temp);
+ xhci_write_64(xhci, ((u64) deq & (u64) ~ERST_PTR_MASK) | temp,
+ &g_xhci_exynos->ir_set_audio->erst_dequeue);
+}
+
+void xhci_exynos_parse_endpoint(struct xhci_hcd *xhci, struct usb_device *udev,
+ struct usb_endpoint_descriptor *desc,
+ struct xhci_container_ctx *ctx)
+{
+ struct usb_endpoint_descriptor *d = desc;
+ int size = 0x100;
+ unsigned int ep_index;
+ struct xhci_ep_ctx *ep_ctx;
+
+ g_hwinfo->rawdesc_length = size;
+ ep_index = xhci_get_endpoint_index(d);
+ ep_ctx = xhci_get_ep_ctx(xhci, ctx, ep_index);
+
+ pr_info("udev = 0x%8x, Ep = 0x%x, desc = 0x%8x, deq = 0x%8x\n",
+ udev, d->bEndpointAddress, d, ep_ctx->deq);
+
+ if (ep_ctx->deq == 0) {
+ pr_info("ep_ctx->deq: 0x%8x has wrong address!!\n", ep_ctx->deq);
+ return;
+ }
+
+ if ((d->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) ==
+ USB_ENDPOINT_XFER_ISOC) {
+ if ((d->bmAttributes & USB_ENDPOINT_USAGE_MASK) ==
+ USB_ENDPOINT_USAGE_FEEDBACK) {
+ /* Only Feedback endpoint(Not implict feedback data endpoint) */
+ if (d->bEndpointAddress & USB_ENDPOINT_DIR_MASK) {
+ g_hwinfo->fb_in_ep =
+ d->bEndpointAddress;
+ pr_info("Feedback IN ISO endpoint #0%x 0x%x\n",
+ d->bEndpointAddress, d->bSynchAddress);
+
+ pr_info("[%s] set fb in deq : %#08llx\n",
+ __func__, ep_ctx->deq);
+ g_hwinfo->fb_old_in_deq = g_hwinfo->fb_in_deq;
+ g_hwinfo->fb_in_deq = ep_ctx->deq;
+ } else {
+ g_hwinfo->fb_out_ep =
+ d->bEndpointAddress;
+ pr_info("Feedback OUT ISO endpoint #0%x 0x%x\n",
+ d->bEndpointAddress, d->bSynchAddress);
+
+ pr_info("[%s] set fb out deq : %#08llx\n",
+ __func__, ep_ctx->deq);
+ g_hwinfo->fb_old_out_deq = g_hwinfo->fb_out_deq;
+ g_hwinfo->fb_out_deq = ep_ctx->deq;
+ }
+ } else {
+ /* Data Stream Endpoint only */
+ if (d->bEndpointAddress & USB_ENDPOINT_DIR_MASK) {
+ if (d->bEndpointAddress != g_hwinfo->fb_in_ep) {
+ g_hwinfo->in_ep =
+ d->bEndpointAddress;
+ pr_info(" This is IN ISO endpoint #0%x 0x%x\n",
+ d->bEndpointAddress, d->bSynchAddress);
+
+ pr_info("[%s] set in deq : %#08llx\n",
+ __func__, ep_ctx->deq);
+ g_hwinfo->old_in_deq = g_hwinfo->in_deq;
+ g_hwinfo->in_deq = ep_ctx->deq;
+ } else {
+ pr_info("IN ISO endpoint is same with FB #0%x\n",
+ d->bEndpointAddress);
+ pr_info("[%s] set fb in deq : %#08llx\n",
+ __func__, ep_ctx->deq);
+ g_hwinfo->fb_old_in_deq = g_hwinfo->fb_in_deq;
+ g_hwinfo->fb_in_deq = ep_ctx->deq;
+ }
+
+ if ((d->bLength > 7) && (d->bSynchAddress != 0x0)) {
+ g_hwinfo->fb_out_ep =
+ d->bSynchAddress;
+ pr_info("Feedback OUT ISO endpoint #0%x 0x%x\n",
+ d->bEndpointAddress, d->bSynchAddress);
+
+ pr_info("[%s] set fb out deq : %#08llx\n",
+ __func__, ep_ctx->deq);
+ g_hwinfo->fb_old_out_deq = g_hwinfo->fb_out_deq;
+ g_hwinfo->fb_out_deq = ep_ctx->deq;
+ }
+ } else {
+ g_hwinfo->out_ep =
+ d->bEndpointAddress;
+ pr_info(" This is OUT ISO endpoint #0%x 0x%x\n",
+ d->bEndpointAddress, d->bSynchAddress);
+
+ pr_info("[%s] set out deq : %#08llx\n",
+ __func__, ep_ctx->deq);
+ g_hwinfo->old_out_deq = g_hwinfo->out_deq;
+ g_hwinfo->out_deq = ep_ctx->deq;
+ if ((d->bLength > 7) && (d->bSynchAddress != 0x0)) {
+ g_hwinfo->fb_in_ep =
+ d->bSynchAddress;
+ pr_info("Feedback IN ISO endpoint #0%x 0x%x\n",
+ d->bEndpointAddress, d->bSynchAddress);
+
+ pr_info("[%s] set fb in deq : %#08llx\n",
+ __func__, ep_ctx->deq);
+ g_hwinfo->fb_old_in_deq = g_hwinfo->fb_in_deq;
+ g_hwinfo->fb_in_deq = ep_ctx->deq;
+ }
+ }
+ }
+ }
+
+
+}
+int xhci_exynos_address_device(struct usb_hcd *hcd, struct usb_device *udev)
+{
+ struct xhci_hcd *xhci;
+ int ret;
+
+ pr_debug("%s +++", __func__);
+ ret = xhci_address_device(hcd, udev);
+ xhci = hcd_to_xhci(hcd);
+
+ xhci_exynos_usb_offload_store_hw_info(xhci, hcd, udev);
+
+ pr_debug("%s ---", __func__);
+ return ret;
+}
+int xhci_exynos_add_endpoint(struct usb_hcd *hcd, struct usb_device *udev,
+ struct usb_host_endpoint *ep)
+{
+ int ret;
+ struct xhci_hcd *xhci;
+ struct xhci_virt_device *virt_dev;
+
+ pr_debug("%s +++", __func__);
+ ret = xhci_add_endpoint(hcd, udev, ep);
+ if (!ret && udev->slot_id) {
+ xhci = hcd_to_xhci(hcd);
+ virt_dev = xhci->devs[udev->slot_id];
+ xhci_exynos_parse_endpoint(xhci, udev, &ep->desc, virt_dev->out_ctx);
+ }
+ pr_debug("%s ---", __func__);
+ return ret;
+}
+static int xhci_exynos_alloc_event_ring(struct xhci_hcd *xhci, gfp_t flags)
+{
+ dma_addr_t dma;
+ unsigned int val;
+ u64 val_64;
+ struct xhci_segment *seg;
+
+ g_xhci_exynos->ir_set_audio = &xhci->run_regs->ir_set[1];
+ g_xhci_exynos->save_addr = dma_pre_alloc_coherent(xhci,
+ sizeof(PAGE_SIZE), &dma, flags);
+ g_xhci_exynos->save_dma = dma;
+ xhci_info(xhci, "// Save address = 0x%llx (DMA), %p (virt)",
+ (unsigned long long)g_xhci_exynos->save_dma, g_xhci_exynos->save_addr);
+
+ if ((xhci->quirks & XHCI_USE_URAM_FOR_EXYNOS_AUDIO)) {
+ /* for AUDIO erst */
+ g_xhci_exynos->event_ring_audio = xhci_ring_alloc_uram(xhci, ERST_NUM_SEGS,
+ 1, TYPE_EVENT, 0, flags, 0);
+ if (!g_xhci_exynos->event_ring_audio)
+ goto fail;
+
+ g_xhci_exynos->erst_audio.entries = ioremap(EXYNOS_URAM_ABOX_ERST_SEG_ADDR,
+ sizeof(struct xhci_erst_entry) * ERST_NUM_SEGS);
+ if (!g_xhci_exynos->erst_audio.entries)
+ goto fail;
+
+ dma = EXYNOS_URAM_ABOX_ERST_SEG_ADDR;
+ xhci_info(xhci, "ABOX audio ERST allocated at 0x%x",
+ EXYNOS_URAM_ABOX_ERST_SEG_ADDR);
+ } else {
+ /* for AUDIO erst */
+ g_xhci_exynos->event_ring_audio = xhci_ring_alloc(xhci, ERST_NUM_SEGS, 1,
+ TYPE_EVENT, 0, flags);
+ if (!g_xhci_exynos->event_ring_audio)
+ goto fail;
+ if (xhci_check_trb_in_td_math(xhci) < 0)
+ goto fail;
+ g_xhci_exynos->erst_audio.entries = dma_pre_alloc_coherent(xhci,
+ sizeof(struct xhci_erst_entry) * ERST_NUM_SEGS, &dma,
+ flags);
+ if (!g_xhci_exynos->erst_audio.entries)
+ goto fail;
+ }
+ xhci_info(xhci, "// Allocated event ring segment table at 0x%llx",
+ (unsigned long long)dma);
+
+ memset(g_xhci_exynos->erst_audio.entries, 0, sizeof(struct xhci_erst_entry) *
+ ERST_NUM_SEGS);
+ g_xhci_exynos->erst_audio.num_entries = ERST_NUM_SEGS;
+ g_xhci_exynos->erst_audio.erst_dma_addr = dma;
+ xhci_info(xhci, "// Set ERST to 0; private num segs = %i, virt addr = %p, dma addr = 0x%llx",
+ xhci->erst.num_entries,
+ xhci->erst.entries,
+ (unsigned long long)xhci->erst.erst_dma_addr);
+
+ /* set ring base address and size for each segment table entry */
+ for (val = 0, seg = g_xhci_exynos->event_ring_audio->first_seg;
+ val < ERST_NUM_SEGS; val++) {
+ struct xhci_erst_entry *entry = &g_xhci_exynos->erst_audio.entries[val];
+
+ entry->seg_addr = cpu_to_le64(seg->dma);
+ entry->seg_size = cpu_to_le32(TRBS_PER_SEGMENT);
+ entry->rsvd = 0;
+ seg = seg->next;
+ }
+
+ /* set ERST count with the number of entries in the segment table */
+ val = readl(&g_xhci_exynos->ir_set_audio->erst_size);
+ val &= ERST_SIZE_MASK;
+ val |= ERST_NUM_SEGS;
+ xhci_info(xhci, "// Write ERST size = %i to ir_set 0 (some bits preserved)",
+ val);
+ writel(val, &g_xhci_exynos->ir_set_audio->erst_size);
+
+ xhci_info(xhci, "// Set ERST entries to point to event ring.");
+ /* set the segment table base address */
+ xhci_info(xhci, "// Set ERST base address for ir_set 0 = 0x%llx",
+ (unsigned long long)g_xhci_exynos->erst_audio.erst_dma_addr);
+ val_64 = xhci_read_64(xhci, &g_xhci_exynos->ir_set_audio->erst_base);
+ val_64 &= ERST_PTR_MASK;
+ val_64 |= (g_xhci_exynos->erst_audio.erst_dma_addr & (u64) ~ERST_PTR_MASK);
+ xhci_write_64(xhci, val_64, &g_xhci_exynos->ir_set_audio->erst_base);
+
+ /* Set the event ring dequeue address */
+ xhci_exynos_set_hc_event_deq_audio(xhci);
+ xhci_info(xhci, "// Wrote ERST address to ir_set 1.");
+
+ return 0;
+fail:
+ return -1;
+}
+
+static void xhci_exynos_free_event_ring(struct xhci_hcd *xhci)
+{
+ if (xhci->quirks & XHCI_USE_URAM_FOR_EXYNOS_AUDIO)
+ iounmap(g_xhci_exynos->erst_audio.entries);
+ else
+ g_xhci_exynos->erst_audio.entries = NULL;
+
+ xhci_info(xhci, "%s: Freed ERST for Audio offloading", __func__);
+
+ if (g_xhci_exynos->event_ring_audio)
+ xhci_exynos_ring_free(xhci, g_xhci_exynos->event_ring_audio);
+ g_xhci_exynos->event_ring_audio = NULL;
+ xhci_info(xhci, "%s: Freed event ring for Audio offloading", __func__);
+}
+
+static void xhci_exynos_free_container_ctx(struct xhci_hcd *xhci, struct xhci_container_ctx *ctx)
+{
+ /* Ignore dma_pool_free if it is allocated from URAM */
+ if (ctx->dma != EXYNOS_URAM_DEVICE_CTX_ADDR)
+ dma_pool_free(xhci->device_pool, ctx->bytes, ctx->dma);
+}
+
+static void xhci_exynos_alloc_container_ctx(struct xhci_hcd *xhci, struct xhci_container_ctx *ctx,
+ int type, gfp_t flags)
+{
+ if (type != XHCI_CTX_TYPE_INPUT && g_xhci_exynos->exynos_uram_ctx_alloc == 0 &&
+ xhci->quirks & XHCI_USE_URAM_FOR_EXYNOS_AUDIO) {
+ /* Only first Device Context uses URAM */
+ int i;
+
+ ctx->bytes = ioremap(EXYNOS_URAM_DEVICE_CTX_ADDR, 2112);
+ if (!ctx->bytes)
+ return;
+
+ for (i = 0; i < 2112; i++)
+ ctx->bytes[i] = 0;
+
+ ctx->dma = EXYNOS_URAM_DEVICE_CTX_ADDR;
+ g_xhci_exynos->usb_audio_ctx_addr = ctx->bytes;
+ g_xhci_exynos->exynos_uram_ctx_alloc = 1;
+ xhci_info(xhci, "First device context allocated at URAM(%x)",
+ EXYNOS_URAM_DEVICE_CTX_ADDR);
+ } else {
+ ctx->bytes = dma_pool_zalloc(xhci->device_pool, flags, &ctx->dma);
+ if (!ctx->bytes)
+ return;
+ }
+}
+
+static struct xhci_ring *xhci_exynos_alloc_transfer_ring(struct xhci_hcd *xhci, u32 endpoint_type,
+ enum xhci_ring_type ring_type, unsigned int max_packet, gfp_t mem_flags)
+{
+ if (xhci->quirks & XHCI_USE_URAM_FOR_EXYNOS_AUDIO) {
+ /* If URAM is not allocated, it try to allocate from URAM */
+ if (g_xhci_exynos->exynos_uram_isoc_out_alloc == 0 &&
+ endpoint_type == ISOC_OUT_EP) {
+ xhci_info(xhci, "First ISOC OUT ring is allocated from URAM.\n");
+ return xhci_ring_alloc_uram(xhci, 1, 1, ring_type,
+ max_packet, mem_flags,
+ endpoint_type);
+
+ g_xhci_exynos->exynos_uram_isoc_out_alloc = 1;
+ } else if (g_xhci_exynos->exynos_uram_isoc_in_alloc == 0 &&
+ endpoint_type == ISOC_IN_EP &&
+ EXYNOS_URAM_ISOC_IN_RING_ADDR != 0x0) {
+ xhci_info(xhci, "First ISOC IN ring is allocated from URAM.\n");
+ return xhci_ring_alloc_uram(xhci, 1, 1, ring_type,
+ max_packet, mem_flags,
+ endpoint_type);
+
+ g_xhci_exynos->exynos_uram_isoc_in_alloc = 1;
+ } else {
+ return xhci_ring_alloc(xhci, 2, 1, ring_type,
+ max_packet, mem_flags);
+ }
+
+ } else {
+ return xhci_ring_alloc(xhci, 2, 1, ring_type, max_packet, mem_flags);
+ }
+}
+
+void xhci_exynos_segment_free_skip(struct xhci_hcd *xhci, struct xhci_segment *seg)
+{
+ if (seg->trbs) {
+ /* Check URAM address for memory free */
+ if (seg->dma == EXYNOS_URAM_ABOX_EVT_RING_ADDR) {
+ iounmap(seg->trbs);
+ } else if (seg->dma == EXYNOS_URAM_ISOC_OUT_RING_ADDR) {
+ g_xhci_exynos->exynos_uram_isoc_out_alloc = 0;
+ if (in_interrupt())
+ g_xhci_exynos->usb_audio_isoc_out_addr = (u8 *)seg->trbs;
+ else
+ iounmap(seg->trbs);
+ } else if (seg->dma == EXYNOS_URAM_ISOC_IN_RING_ADDR) {
+ g_xhci_exynos->exynos_uram_isoc_in_alloc = 0;
+ if (in_interrupt())
+ g_xhci_exynos->usb_audio_isoc_in_addr = (u8 *)seg->trbs;
+ else
+ iounmap(seg->trbs);
+ } else
+ dma_pool_free(xhci->segment_pool, seg->trbs, seg->dma);
+
+ seg->trbs = NULL;
+ }
+ kfree(seg->bounce_buf);
+ kfree(seg);
+}
+
+void xhci_exynos_free_segments_for_ring(struct xhci_hcd *xhci,
+ struct xhci_segment *first)
+{
+ struct xhci_segment *seg;
+
+ seg = first->next;
+
+ if (!seg)
+ xhci_err(xhci, "segment is null unexpectedly\n");
+
+ while (seg != first) {
+ struct xhci_segment *next = seg->next;
+
+ xhci_exynos_segment_free_skip(xhci, seg);
+ seg = next;
+ }
+ xhci_exynos_segment_free_skip(xhci, first);
+}
+
+void xhci_exynos_ring_free(struct xhci_hcd *xhci, struct xhci_ring *ring)
+{
+ if (!ring)
+ return;
+
+ //trace_xhci_ring_free(ring);
+
+ if (ring->first_seg) {
+ if (ring->type == TYPE_STREAM)
+ xhci_remove_stream_mapping(ring);
+
+ xhci_exynos_free_segments_for_ring(xhci, ring->first_seg);
+ }
+
+ kfree(ring);
+}
+
+static void xhci_exynos_free_transfer_ring(struct xhci_hcd *xhci,
+ struct xhci_virt_device *virt_dev, unsigned int ep_index)
+{
+ xhci_exynos_ring_free(xhci, virt_dev->eps[ep_index].ring);
+}
+
+static int xhci_exynos_vendor_init(struct xhci_hcd *xhci)
+{
+ return 0;
+
+}
+static void xhci_exynos_vendor_cleanup(struct xhci_hcd *xhci)
+{
+ xhci_exynos_free_event_ring(xhci);
+}
+
+static bool xhci_exynos_is_usb_offload_enabled(struct xhci_hcd *xhci,
+ struct xhci_virt_device *virt_dev, unsigned int ep_index)
+{
+ return true;
+}
+
+static struct xhci_device_context_array *xhci_exynos_alloc_dcbaa(
+ struct xhci_hcd *xhci, gfp_t flags)
+{
+ dma_addr_t dma;
+
+ if (xhci->quirks & XHCI_USE_URAM_FOR_EXYNOS_AUDIO) {
+ int i;
+
+ xhci_info(xhci, "DCBAA is allocated at 0x%x(URAM)",
+ EXYNOS_URAM_DCBAA_ADDR);
+ /* URAM allocation for DCBAA */
+ xhci->dcbaa = ioremap(EXYNOS_URAM_DCBAA_ADDR,
+ sizeof(*xhci->dcbaa));
+ if (!xhci->dcbaa)
+ return NULL;
+ /* Clear DCBAA */
+ for (i = 0; i < MAX_HC_SLOTS; i++)
+ xhci->dcbaa->dev_context_ptrs[i] = 0x0;
+
+ xhci->dcbaa->dma = EXYNOS_URAM_DCBAA_ADDR;
+ } else {
+ xhci->dcbaa = dma_pre_alloc_coherent(xhci, sizeof(*xhci->dcbaa),
+ &dma, flags);
+ if (!xhci->dcbaa)
+ return NULL;
+ memset(xhci->dcbaa, 0, sizeof *(xhci->dcbaa));
+ xhci->dcbaa->dma = dma;
+ }
+ return xhci->dcbaa;
+}
+
+static void xhci_exynos_free_dcbaa(struct xhci_hcd *xhci)
+{
+ if (xhci->quirks & XHCI_USE_URAM_FOR_EXYNOS_AUDIO) {
+ iounmap(xhci->dcbaa);
+ if (g_xhci_exynos->usb_audio_ctx_addr != NULL) {
+ iounmap(g_xhci_exynos->usb_audio_ctx_addr);
+ g_xhci_exynos->usb_audio_ctx_addr = NULL;
+ }
+ if (g_xhci_exynos->usb_audio_isoc_out_addr != NULL) {
+ iounmap(g_xhci_exynos->usb_audio_isoc_out_addr);
+ g_xhci_exynos->usb_audio_isoc_out_addr = NULL;
+ }
+ if (g_xhci_exynos->usb_audio_isoc_in_addr != NULL) {
+ iounmap(g_xhci_exynos->usb_audio_isoc_in_addr);
+ g_xhci_exynos->usb_audio_isoc_in_addr = NULL;
+ }
+ } else
+ xhci->dcbaa = NULL;
+}
+
+/* URAM Allocation Functions */
+static struct xhci_segment *xhci_segment_alloc_uram(struct xhci_hcd *xhci,
+ unsigned int cycle_state,
+ unsigned int max_packet,
+ gfp_t flags)
+{
+ struct xhci_segment *seg;
+ dma_addr_t dma;
+ int i;
+ struct device *dev = xhci_to_hcd(xhci)->self.sysdev;
+
+ seg = kzalloc_node(sizeof(*seg), flags, dev_to_node(dev));
+ if (!seg)
+ return NULL;
+
+ seg->trbs = ioremap(EXYNOS_URAM_ABOX_EVT_RING_ADDR, TRB_SEGMENT_SIZE);
+ if (!seg->trbs)
+ return NULL;
+
+ dma = EXYNOS_URAM_ABOX_EVT_RING_ADDR;
+
+ if (max_packet) {
+ seg->bounce_buf = kzalloc_node(max_packet, flags,
+ dev_to_node(dev));
+ if (!seg->bounce_buf) {
+ dma_pool_free(xhci->segment_pool, seg->trbs, dma);
+ kfree(seg);
+ return NULL;
+ }
+ }
+ /* If the cycle state is 0, set the cycle bit to 1 for all the TRBs */
+ if (cycle_state == 0) {
+ for (i = 0; i < TRBS_PER_SEGMENT; i++)
+ seg->trbs[i].link.control |= cpu_to_le32(TRB_CYCLE);
+ }
+ seg->dma = dma;
+ xhci_info(xhci, "ABOX Event Ring is allocated at 0x%x",
+ EXYNOS_URAM_ABOX_EVT_RING_ADDR);
+ seg->next = NULL;
+
+ return seg;
+}
+
+static struct xhci_segment *xhci_segment_alloc_uram_ep(struct xhci_hcd *xhci,
+ unsigned int cycle_state,
+ unsigned int max_packet,
+ gfp_t flags, int seg_num,
+ u32 endpoint_type)
+{
+ struct xhci_segment *seg;
+ dma_addr_t dma;
+ int i;
+ struct device *dev = xhci_to_hcd(xhci)->self.sysdev;
+
+ seg = kzalloc_node(sizeof(*seg), flags, dev_to_node(dev));
+ if (!seg)
+ return NULL;
+
+ if (seg_num != 0) {
+ /* Support just one segment */
+ xhci_err(xhci, "%s : Unexpected SEG NUMBER!\n", __func__);
+ return NULL;
+ }
+
+ if (endpoint_type == ISOC_OUT_EP) {
+ seg->trbs = ioremap(EXYNOS_URAM_ISOC_OUT_RING_ADDR,
+ TRB_SEGMENT_SIZE);
+ if (!seg->trbs)
+ return NULL;
+
+ dma = EXYNOS_URAM_ISOC_OUT_RING_ADDR;
+ xhci_info(xhci, "First ISOC-OUT Ring is allocated at 0x%x", dma);
+ } else if (endpoint_type == ISOC_IN_EP) {
+ seg->trbs = ioremap(EXYNOS_URAM_ISOC_IN_RING_ADDR,
+ TRB_SEGMENT_SIZE);
+ if (!seg->trbs)
+ return NULL;
+
+ dma = EXYNOS_URAM_ISOC_IN_RING_ADDR;
+ xhci_info(xhci, "First ISOC-IN Ring is allocated at 0x%x", dma);
+ } else {
+ xhci_err(xhci, "%s : Unexpected EP Type!\n", __func__);
+ return NULL;
+ }
+
+ for (i = 0; i < 256; i++) {
+ seg->trbs[i].link.segment_ptr = 0;
+ seg->trbs[i].link.intr_target = 0;
+ seg->trbs[i].link.control = 0;
+ }
+
+
+ if (max_packet) {
+ seg->bounce_buf = kzalloc_node(max_packet, flags,
+ dev_to_node(dev));
+ if (!seg->bounce_buf) {
+ dma_pool_free(xhci->segment_pool, seg->trbs, dma);
+ kfree(seg);
+ return NULL;
+ }
+ }
+ /* If the cycle state is 0, set the cycle bit to 1 for all the TRBs */
+ if (cycle_state == 0) {
+ for (i = 0; i < TRBS_PER_SEGMENT; i++)
+ seg->trbs[i].link.control |= cpu_to_le32(TRB_CYCLE);
+ }
+ seg->dma = dma;
+ seg->next = NULL;
+
+ return seg;
+}
+
+static int xhci_alloc_segments_for_ring_uram(struct xhci_hcd *xhci,
+ struct xhci_segment **first, struct xhci_segment **last,
+ unsigned int num_segs, unsigned int cycle_state,
+ enum xhci_ring_type type, unsigned int max_packet, gfp_t flags,
+ u32 endpoint_type)
+{
+ struct xhci_segment *prev;
+ bool chain_links;
+
+ /* Set chain bit for 0.95 hosts, and for isoc rings on AMD 0.96 host */
+ chain_links = !!(xhci_link_trb_quirk(xhci) ||
+ (type == TYPE_ISOC &&
+ (xhci->quirks & XHCI_AMD_0x96_HOST)));
+
+ if (type == TYPE_ISOC) {
+ prev = xhci_segment_alloc_uram_ep(xhci, cycle_state,
+ max_packet, flags, 0,
+ endpoint_type);
+ } else if (type == TYPE_EVENT) {
+ prev = xhci_segment_alloc_uram(xhci, cycle_state, max_packet, flags);
+ } else {
+ xhci_err(xhci, "Unexpected TYPE for URAM allocation!\n");
+ return -ENOMEM;
+ }
+
+ if (!prev)
+ return -ENOMEM;
+ num_segs--;
+
+ *first = prev;
+ while (num_segs > 0) {
+ struct xhci_segment *next = NULL;
+
+ if (type == TYPE_ISOC) {
+ prev = xhci_segment_alloc_uram_ep(xhci, cycle_state,
+ max_packet, flags, 1,
+ endpoint_type);
+ } else if (type == TYPE_EVENT) {
+ next = xhci_segment_alloc_uram(xhci, cycle_state,
+ max_packet, flags);
+ } else {
+ xhci_err(xhci, "Unexpected TYPE for URAM alloc(multi)!\n");
+ return -ENOMEM;
+ }
+
+ if (!next) {
+ prev = *first;
+ while (prev) {
+ next = prev->next;
+ xhci_segment_free(xhci, prev);
+ prev = next;
+ }
+ return -ENOMEM;
+ }
+ xhci_link_segments(prev, next, type, chain_links);
+
+ prev = next;
+ num_segs--;
+ }
+ xhci_link_segments(prev, *first, type, chain_links);
+ *last = prev;
+
+ return 0;
+}
+
+struct xhci_ring *xhci_ring_alloc_uram(struct xhci_hcd *xhci,
+ unsigned int num_segs, unsigned int cycle_state,
+ enum xhci_ring_type type, unsigned int max_packet, gfp_t flags,
+ u32 endpoint_type)
+{
+ struct xhci_ring *ring;
+ int ret;
+ struct device *dev = xhci_to_hcd(xhci)->self.sysdev;
+
+ ring = kzalloc_node(sizeof(*ring), flags, dev_to_node(dev));
+ if (!ring)
+ return NULL;
+
+ ring->num_segs = num_segs;
+ ring->bounce_buf_len = max_packet;
+ INIT_LIST_HEAD(&ring->td_list);
+ ring->type = type;
+ if (num_segs == 0)
+ return ring;
+
+ ret = xhci_alloc_segments_for_ring_uram(xhci, &ring->first_seg,
+ &ring->last_seg, num_segs, cycle_state, type,
+ max_packet, flags, endpoint_type);
+ if (ret)
+ goto fail;
+
+ /* Only event ring does not use link TRB */
+ if (type != TYPE_EVENT) {
+ /* See section 4.9.2.1 and 6.4.4.1 */
+ ring->last_seg->trbs[TRBS_PER_SEGMENT - 1].link.control |=
+ cpu_to_le32(LINK_TOGGLE);
+ }
+ xhci_initialize_ring_info(ring, cycle_state);
+ //trace_xhci_ring_alloc(ring);
+ return ring;
+
+fail:
+ kfree(ring);
+ return NULL;
+}
+#endif
+//#ifdef CONFIG_SND_EXYNOS_USB_AUDIO
+
+extern struct usb_xhci_pre_alloc xhci_pre_alloc;
+static const struct xhci_driver_overrides xhci_exynos_overrides __initconst = {
+ .extra_priv_size = sizeof(struct xhci_exynos_priv),
+ .reset = xhci_exynos_setup,
+ .start = xhci_exynos_start,
+#ifdef CONFIG_SND_EXYNOS_USB_AUDIO
+ .add_endpoint = xhci_exynos_add_endpoint,
+ .address_device = xhci_exynos_address_device,
+#endif
+ .bus_suspend = xhci_exynos_bus_suspend,
+ .bus_resume = xhci_exynos_bus_resume,
+};
+
+int xhci_exynos_bus_suspend(struct usb_hcd *hcd)
+{
+ struct xhci_exynos_priv *priv = hcd_to_xhci_exynos_priv(hcd);
+ struct xhci_hcd_exynos *xhci_exynos = priv->xhci_exynos;
+ struct xhci_hcd *xhci = hcd_to_xhci(hcd);
+ int ret, main_hcd;
+
+ pr_info("%s, priv = 0x%8x, xhci_exynos = 0x%8x\n",
+ __func__, priv, xhci_exynos);
+
+ if (hcd == xhci->main_hcd)
+ main_hcd = 1;
+ else
+ main_hcd = 0;
+
+ ret = xhci_bus_suspend(hcd);
+
+ xhci_exynos_wake_lock(xhci_exynos, main_hcd, 0);
+
+ return ret;
+}
+
+int xhci_exynos_bus_resume(struct usb_hcd *hcd)
+{
+ struct xhci_exynos_priv *priv = hcd_to_xhci_exynos_priv(hcd);
+ struct xhci_hcd_exynos *xhci_exynos = priv->xhci_exynos;
+ struct xhci_hcd *xhci = hcd_to_xhci(hcd);
+
+ int ret, main_hcd;
+
+ if (hcd == xhci->main_hcd)
+ main_hcd = 1;
+ else
+ main_hcd = 0;
+
+ pr_info("%s, hcd = 0x%8x\n", __func__, hcd);
+
+ ret = xhci_bus_resume(hcd);
+
+ xhci_exynos_wake_lock(xhci_exynos, main_hcd, 1);
+
+ return ret;
+}
+
+static void xhci_priv_exynos_start(struct usb_hcd *hcd)
+{
+ struct xhci_exynos_priv *priv = hcd_to_xhci_exynos_priv(hcd);
+
+ if (priv->plat_start)
+ priv->plat_start(hcd);
+}
+
+void xhci_exynos_portsc_power_off(void __iomem *portsc, u32 on, u32 prt)
+{
+ struct xhci_hcd_exynos *xhci_exynos = g_xhci_exynos;
+
+ u32 reg;
+
+ spin_lock(&xhci_exynos->xhcioff_lock);
+
+ pr_info("%s, on=%d portsc_control_priority=%d, prt=%d\n",
+ __func__, on, xhci_exynos->portsc_control_priority, prt);
+
+ if (xhci_exynos->portsc_control_priority > prt) {
+ spin_unlock(&xhci_exynos->xhcioff_lock);
+ return;
+ }
+
+ xhci_exynos->portsc_control_priority = prt;
+
+ if (on && !xhci_exynos->port_off_done) {
+ pr_info("%s, Do not switch-on port\n", __func__);
+ spin_unlock(&xhci_exynos->xhcioff_lock);
+ return;
+ }
+
+ reg = readl(portsc);
+
+ if (on)
+ reg |= PORT_POWER;
+ else
+ reg &= ~PORT_POWER;
+
+ writel(reg, portsc);
+ reg = readl(portsc);
+
+ pr_info("power %s portsc, reg = 0x%x addr = %8x\n",
+ on ? "on" : "off", reg, (u64)portsc);
+
+ if (on)
+ xhci_exynos->port_off_done = 0;
+ else
+ xhci_exynos->port_off_done = 1;
+
+ spin_unlock(&xhci_exynos->xhcioff_lock);
+}
+
+int xhci_exynos_port_power_set(u32 on, u32 prt)
+{
+ if (!g_xhci_exynos)
+ return -EACCES;
+
+ if (g_xhci_exynos->usb3_portsc) {
+ xhci_exynos_portsc_power_off(g_xhci_exynos->usb3_portsc, on, prt);
+ return 0;
+ }
+
+ pr_info("%s, usb3_portsc is NULL\n", __func__);
+ return -EIO;
+}
+EXPORT_SYMBOL_GPL(xhci_exynos_port_power_set);
+
+static int xhci_exynos_check_port(struct usb_device *dev, bool on)
+{
+ struct usb_device *hdev;
+ struct usb_device *udev = dev;
+ struct device *ddev = &udev->dev;
+ struct xhci_hcd_exynos *xhci_exynos = g_xhci_exynos;
+ enum usb_port_state pre_state;
+ int usb3_hub_detect = 0;
+ int usb2_detect = 0;
+ int port;
+ int bInterfaceClass = 0;
+
+ if (udev->bus->root_hub == udev) {
+ pr_info("this dev is a root hub\n");
+ goto skip;
+ }
+
+ pre_state = xhci_exynos->port_state;
+
+ /* Find root hub */
+ hdev = udev->parent;
+ if (!hdev)
+ goto skip;
+
+ hdev = dev->bus->root_hub;
+ if (!hdev)
+ goto skip;
+ pr_info("root hub maxchild = %d\n", hdev->maxchild);
+
+ /* check all ports */
+ usb_hub_for_each_child(hdev, port, udev) {
+ dev_dbg(ddev, "%s, class = %d, speed = %d\n",
+ __func__, udev->descriptor.bDeviceClass,
+ udev->speed);
+ dev_dbg(ddev, "udev = 0x%8x, state = %d\n", udev, udev->state);
+ if (udev && udev->state == USB_STATE_CONFIGURED) {
+ if (!dev->config->interface[0])
+ continue;
+
+ bInterfaceClass = udev->config->interface[0]
+ ->cur_altsetting->desc.bInterfaceClass;
+ if (on) {
+ if (bInterfaceClass == USB_CLASS_HID ||
+ bInterfaceClass == USB_CLASS_AUDIO) {
+ udev->do_remote_wakeup =
+ (udev->config->desc.bmAttributes &
+ USB_CONFIG_ATT_WAKEUP) ? 1 : 0;
+ if (udev->do_remote_wakeup == 1) {
+ device_init_wakeup(ddev, 1);
+ usb_enable_autosuspend(dev);
+ }
+ dev_dbg(ddev, "%s, remote_wakeup = %d\n",
+ __func__, udev->do_remote_wakeup);
+ }
+ }
+ if (bInterfaceClass == USB_CLASS_HUB) {
+ xhci_exynos->port_state = PORT_HUB;
+ usb3_hub_detect = 1;
+ break;
+ } else if (bInterfaceClass == USB_CLASS_BILLBOARD) {
+ xhci_exynos->port_state = PORT_DP;
+ usb3_hub_detect = 1;
+ break;
+ }
+
+ if (udev->speed >= USB_SPEED_SUPER) {
+ xhci_exynos->port_state = PORT_USB3;
+ usb3_hub_detect = 1;
+ break;
+ } else {
+ xhci_exynos->port_state = PORT_USB2;
+ usb2_detect = 1;
+ }
+ } else {
+ pr_info("not configured, state = %d\n", udev->state);
+ }
+ }
+
+ if (!usb3_hub_detect && !usb2_detect)
+ xhci_exynos->port_state = PORT_EMPTY;
+
+ pr_info("%s %s state pre=%d now=%d\n", __func__,
+ on ? "on" : "off", pre_state, xhci_exynos->port_state);
+
+ return xhci_exynos->port_state;
+
+skip:
+ return -EINVAL;
+}
+
+static void xhci_exynos_set_port(struct usb_device *dev, bool on)
+{
+ int port;
+
+ port = xhci_exynos_check_port(dev, on);
+ if (g_xhci_exynos->dp_use == true)
+ port = PORT_DP;
+
+ switch (port) {
+ case PORT_EMPTY:
+ pr_info("Port check empty\n");
+ is_otg_only = 1;
+ if (!g_xhci_exynos->usb3_phy_control) {
+ usb_power_notify_control(0, 1);
+ g_xhci_exynos->usb3_phy_control = true;
+ }
+ xhci_exynos_port_power_set(1, 1);
+ break;
+ case PORT_USB2:
+ pr_info("Port check usb2\n");
+ is_otg_only = 0;
+ xhci_exynos_port_power_set(0, 1);
+ if (g_xhci_exynos->usb3_phy_control) {
+ usb_power_notify_control(0, 0);
+ g_xhci_exynos->usb3_phy_control = false;
+ }
+ break;
+ case PORT_USB3:
+ /* xhci_port_power_set(1, 1); */
+ is_otg_only = 0;
+ pr_info("Port check usb3\n");
+ break;
+ case PORT_HUB:
+ /*xhci_exynos_port_power_set(1, 1);*/
+ pr_info("Port check hub\n");
+ is_otg_only = 0;
+ break;
+ case PORT_DP:
+ /*xhci_exynos_port_power_set(1, 1);*/
+ pr_info("Port check DP\n");
+ is_otg_only = 0;
+ break;
+ default:
+ break;
+ }
+}
+
+int xhci_exynos_inform_dp_use(int use, int lane_cnt)
+{
+ int ret = 0;
+
+ pr_info("[%s] dp use = %d, lane_cnt = %d\n",
+ __func__, use, lane_cnt);
+
+ /*
+ * otg_connection will be available
+ * after usb__audio is merged.
+ * At that time, modify this.
+ */
+ /*if (!otg_connection || !g_xhci_exynos)*/
+ if (!g_xhci_exynos)
+ return 0;
+
+ if (use == 1) {
+ g_xhci_exynos->dp_use = true;
+#ifdef CONFIG_EXYNOS_USBDRD_PHY30
+ if (g_xhci_exynos->usb3_phy_control == false) {
+ usb_power_notify_control(1, 1);
+ g_xhci_exynos->usb3_phy_control = true;
+ }
+ if (lane_cnt == 4) {
+ exynos_usbdrd_dp_use_notice(lane_cnt);
+ ret = xhci_exynos_port_power_set(0, 2);
+ }
+#endif
+ udelay(1);
+ } else {
+#ifdef CONFIG_EXYNOS_USBDRD_PHY30
+ if (g_xhci_exynos->port_state == PORT_USB2) {
+ if (g_xhci_exynos->usb3_phy_control == true) {
+ usb_power_notify_control(1, 0);
+ g_xhci_exynos->usb3_phy_control = false;
+ }
+ }
+#endif
+ g_xhci_exynos->dp_use = false;
+ }
+
+ return ret;
+}
+EXPORT_SYMBOL(xhci_exynos_inform_dp_use);
+
+static int xhci_exynos_power_notify(struct notifier_block *self,
+ unsigned long action, void *dev)
+{
+ switch (action) {
+ case USB_DEVICE_ADD:
+ xhci_exynos_set_port(dev, 1);
+ break;
+ case USB_DEVICE_REMOVE:
+ xhci_exynos_set_port(dev, 0);
+ break;
+ }
+ return NOTIFY_OK;
+}
+
+static struct notifier_block dev_nb = {
+ .notifier_call = xhci_exynos_power_notify,
+};
+
+void xhci_exynos_register_notify(void)
+{
+ is_otg_only = 1;
+ g_xhci_exynos->port_state = PORT_EMPTY;
+ usb_register_notify(&dev_nb);
+}
+
+void xhci_exynos_unregister_notify(void)
+{
+ usb_unregister_notify(&dev_nb);
+}
+
+static int xhci_priv_init_quirk(struct usb_hcd *hcd)
+{
+ struct xhci_exynos_priv *priv = hcd_to_xhci_exynos_priv(hcd);
+
+ if (!priv->init_quirk)
+ return 0;
+
+ return priv->init_quirk(hcd);
+}
+
+static int xhci_priv_suspend_quirk(struct usb_hcd *hcd)
+{
+ struct xhci_plat_priv *priv = hcd_to_xhci_priv(hcd);
+
+ if (!priv->suspend_quirk)
+ return 0;
+
+ return priv->suspend_quirk(hcd);
+}
+
+static int xhci_priv_resume_quirk(struct usb_hcd *hcd)
+{
+ struct xhci_exynos_priv *priv = hcd_to_xhci_exynos_priv(hcd);
+
+ if (!priv->resume_quirk)
+ return 0;
+
+ return priv->resume_quirk(hcd);
+}
+
+static void xhci_exynos_quirks(struct device *dev, struct xhci_hcd *xhci)
+{
+ struct xhci_exynos_priv *priv = xhci_to_exynos_priv(xhci);
+
+ /*
+ * As of now platform drivers don't provide MSI support so we ensure
+ * here that the generic code does not try to make a pci_dev from our
+ * dev struct in order to setup MSI
+ */
+ xhci->quirks |= XHCI_PLAT | priv->quirks;
+}
+
+/* called during probe() after chip reset completes */
+static int xhci_exynos_setup(struct usb_hcd *hcd)
+{
+ int ret;
+#ifdef CONFIG_SND_EXYNOS_USB_AUDIO
+ struct xhci_hcd *xhci = hcd_to_xhci(hcd);
+#endif
+
+ ret = xhci_priv_init_quirk(hcd);
+ if (ret)
+ return ret;
+
+ ret = xhci_gen_setup(hcd, xhci_exynos_quirks);
+#ifdef CONFIG_SND_EXYNOS_USB_AUDIO
+ pr_debug("%s: alloc_event_ring!\n", __func__);
+ xhci_exynos_alloc_event_ring(xhci, GFP_KERNEL);
+#endif
+
+ return ret;
+}
+
+static int xhci_exynos_start(struct usb_hcd *hcd)
+{
+#ifdef CONFIG_SND_EXYNOS_USB_AUDIO
+ struct xhci_hcd *xhci;
+#endif
+ int ret;
+
+ xhci_priv_exynos_start(hcd);
+ ret = xhci_run(hcd);
+
+#ifdef CONFIG_SND_EXYNOS_USB_AUDIO
+ xhci = hcd_to_xhci(hcd);
+ pr_debug("%s: enable_event_ring!\n", __func__);
+ xhci_exynos_usb_offload_enable_event_ring(xhci);
+#endif
+ return ret;
+}
+
+static ssize_t
+xhci_exynos_ss_compliance_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct usb_hcd *hcd = dev_get_drvdata(dev);
+ u32 reg;
+ void __iomem *reg_base;
+
+ reg_base = hcd->regs;
+ reg = readl(reg_base + PORTSC_OFFSET);
+
+ return sysfs_emit(buf, "0x%x\n", reg);
+}
+
+static ssize_t
+xhci_exynos_ss_compliance_store(struct device *dev,
+ struct device_attribute *attr, const char *buf, size_t n)
+{
+ struct usb_hcd *hcd = dev_get_drvdata(dev);
+ int value;
+ u32 reg;
+ void __iomem *reg_base;
+
+ if (kstrtoint(buf, 10, &value))
+ return -EINVAL;
+
+ reg_base = hcd->regs;
+
+ if (value == 1) {
+ /* PORTSC PLS is set to 10, LWS to 1 */
+ reg = readl(reg_base + PORTSC_OFFSET);
+ reg &= ~((0xF << 5) | (1 << 16));
+ reg |= (10 << 5) | (1 << 16);
+ writel(reg, reg_base + PORTSC_OFFSET);
+ pr_info("SS host compliance enabled portsc 0x%x\n", reg);
+ } else
+ pr_info("Only 1 is allowed for input value\n");
+
+ return n;
+}
+
+static DEVICE_ATTR_RW(xhci_exynos_ss_compliance);
+
+
+static struct attribute *xhci_exynos_attrs[] = {
+ &dev_attr_xhci_exynos_ss_compliance.attr,
+ NULL
+};
+ATTRIBUTE_GROUPS(xhci_exynos);
+
+#ifdef CONFIG_OF
+static const struct of_device_id usb_xhci_of_match[] = {
+ {
+ .compatible = "generic-xhci",
+ }, {
+ .compatible = "xhci-platform",
+ },
+ {},
+};
+MODULE_DEVICE_TABLE(of, usb_xhci_of_match);
+#endif
+
+static void xhci_pm_runtime_init(struct device *dev)
+{
+ dev->power.runtime_status = RPM_SUSPENDED;
+ dev->power.idle_notification = false;
+
+ dev->power.disable_depth = 1;
+ atomic_set(&dev->power.usage_count, 0);
+
+ dev->power.runtime_error = 0;
+
+ atomic_set(&dev->power.child_count, 0);
+ pm_suspend_ignore_children(dev, false);
+ dev->power.runtime_auto = true;
+
+ dev->power.request_pending = false;
+ dev->power.request = RPM_REQ_NONE;
+ dev->power.deferred_resume = false;
+ dev->power.accounting_timestamp = jiffies;
+
+ dev->power.timer_expires = 0;
+ init_waitqueue_head(&dev->power.wait_queue);
+}
+
+static struct xhci_plat_priv_overwrite xhci_plat_vendor_overwrite;
+
+int xhci_exynos_register_vendor_ops(struct xhci_vendor_ops *vendor_ops)
+{
+ if (vendor_ops == NULL)
+ return -EINVAL;
+
+ xhci_plat_vendor_overwrite.vendor_ops = vendor_ops;
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(xhci_exynos_register_vendor_ops);
+
+
+static int xhci_vendor_init(struct xhci_hcd *xhci)
+{
+ struct xhci_vendor_ops *ops = NULL;
+
+ if (xhci_plat_vendor_overwrite.vendor_ops)
+ ops = xhci->vendor_ops = xhci_plat_vendor_overwrite.vendor_ops;
+
+ if (ops && ops->vendor_init)
+ return ops->vendor_init(xhci);
+ return 0;
+}
+
+static void xhci_vendor_cleanup(struct xhci_hcd *xhci)
+{
+ struct xhci_vendor_ops *ops = xhci_vendor_get_ops(xhci);
+
+ if (ops && ops->vendor_cleanup)
+ ops->vendor_cleanup(xhci);
+
+ xhci->vendor_ops = NULL;
+}
+
+#ifdef CONFIG_SND_EXYNOS_USB_AUDIO
+static struct xhci_vendor_ops ops = {
+ .vendor_init = xhci_exynos_vendor_init,
+ .vendor_cleanup = xhci_exynos_vendor_cleanup,
+ .is_usb_offload_enabled = xhci_exynos_is_usb_offload_enabled,
+ .alloc_dcbaa = xhci_exynos_alloc_dcbaa,
+ .free_dcbaa = xhci_exynos_free_dcbaa,
+ .alloc_transfer_ring = xhci_exynos_alloc_transfer_ring,
+ .free_transfer_ring = xhci_exynos_free_transfer_ring,
+ .alloc_container_ctx = xhci_exynos_alloc_container_ctx,
+ .free_container_ctx = xhci_exynos_free_container_ctx,
+};
+#endif
+
+int xhci_exynos_wake_lock(struct xhci_hcd_exynos *xhci_exynos,
+ int is_main_hcd, int is_lock)
+{
+ struct usb_hcd *hcd = xhci_exynos->hcd;
+ int idle_ip_index;
+ struct xhci_hcd *xhci = hcd_to_xhci(hcd);
+ struct wakeup_source *main_wakelock, *shared_wakelock;
+
+ main_wakelock = xhci_exynos->main_wakelock;
+ shared_wakelock = xhci_exynos->shared_wakelock;
+
+ dev_info(xhci_exynos->dev, "<<< %s - hcd = 0x%8x 0x%8x 0x%8x\n",
+ __func__, hcd, main_wakelock, shared_wakelock);
+
+ if (xhci->xhc_state & XHCI_STATE_REMOVING) {
+ dev_info(xhci_exynos->dev, "%s - Host removing return!\n",
+ __func__);
+ return -ESHUTDOWN;
+ }
+
+ if (is_lock) {
+ if (is_main_hcd) {
+ dev_info(xhci_exynos->dev, "%s: Main HCD WAKE LOCK\n", __func__);
+ __pm_stay_awake(main_wakelock);
+ } else {
+ dev_info(xhci_exynos->dev, "%s: Shared HCD WAKE LOCK\n", __func__);
+ __pm_stay_awake(shared_wakelock);
+ }
+
+ /* Add a routine for disable IDLEIP (IP idle) */
+ dev_info(xhci_exynos->dev, "IDLEIP(SICD) disable.\n");
+ idle_ip_index = get_idle_ip_index();
+ pr_info("%s, usb idle ip = %d\n", __func__, idle_ip_index);
+ exynos_update_ip_idle_status(idle_ip_index, 0);
+ } else {
+ if (is_main_hcd) {
+ dev_info(xhci_exynos->dev, "%s: Main HCD WAKE UNLOCK\n", __func__);
+ __pm_relax(main_wakelock);
+ } else {
+ dev_info(xhci_exynos->dev, "%s: Shared HCD WAKE UNLOCK\n", __func__);
+ __pm_relax(shared_wakelock);
+ }
+
+ if (!main_wakelock->active && !shared_wakelock->active) {
+ xhci_info(xhci, "Try to IDLEIP Enable!!!\n");
+
+ /* Add a routine for enable IDLEIP (IP idle) */
+ dev_info(xhci_exynos->dev, "IDLEIP(SICD) Enable.\n");
+ idle_ip_index = get_idle_ip_index();
+ pr_info("%s, usb idle ip = %d\n", __func__, idle_ip_index);
+ exynos_update_ip_idle_status(idle_ip_index, 1);
+ }
+ }
+
+ return 0;
+}
+static int xhci_exynos_probe(struct platform_device *pdev)
+{
+ struct device *parent = pdev->dev.parent;
+ const struct hc_driver *driver;
+ struct device *sysdev, *tmpdev;
+ struct xhci_hcd *xhci;
+ struct xhci_hcd_exynos *xhci_exynos;
+ struct xhci_exynos_priv *priv;
+ struct resource *res;
+ struct usb_hcd *hcd;
+ struct usb_device *hdev;
+ struct usb_hub *hub;
+ struct usb_port *port_dev;
+ int ret;
+ int irq;
+
+ struct wakeup_source *main_wakelock, *shared_wakelock;
+ int value;
+
+ dev_info(&pdev->dev, "XHCI PLAT START\n");
+
+#ifdef CONFIG_SND_EXYNOS_USB_AUDIO
+ xhci_exynos_register_vendor_ops(&ops);
+#endif
+ main_wakelock = wakeup_source_register(&pdev->dev, dev_name(&pdev->dev));
+ __pm_stay_awake(main_wakelock);
+
+ /* Initialization shared wakelock for SS HCD */
+ shared_wakelock = wakeup_source_register(&pdev->dev, dev_name(&pdev->dev));
+ __pm_stay_awake(shared_wakelock);
+
+ is_rewa_enabled = 0;
+
+ if (usb_disabled())
+ return -ENODEV;
+
+ driver = &xhci_exynos_hc_driver;
+
+ irq = platform_get_irq(pdev, 0);
+ if (irq < 0)
+ return irq;
+
+ /*
+ * sysdev must point to a device that is known to the system firmware
+ * or PCI hardware. We handle these three cases here:
+ * 1. xhci_plat comes from firmware
+ * 2. xhci_plat is child of a device from firmware (dwc3-plat)
+ * 3. xhci_plat is grandchild of a pci device (dwc3-pci)
+ */
+ for (sysdev = &pdev->dev; sysdev; sysdev = sysdev->parent) {
+ if (is_of_node(sysdev->fwnode) ||
+ is_acpi_device_node(sysdev->fwnode))
+ break;
+#ifdef CONFIG_PCI
+ else if (sysdev->bus == &pci_bus_type)
+ break;
+#endif
+ }
+
+ if (!sysdev)
+ sysdev = &pdev->dev;
+
+ /* Try to set 64-bit DMA first */
+ if (WARN_ON(!sysdev->dma_mask))
+ /* Platform did not initialize dma_mask */
+ ret = dma_coerce_mask_and_coherent(sysdev,
+ DMA_BIT_MASK(64));
+ else
+ ret = dma_set_mask_and_coherent(sysdev, DMA_BIT_MASK(64));
+
+ /* If seting 64-bit DMA mask fails, fall back to 32-bit DMA mask */
+ if (ret) {
+ ret = dma_set_mask_and_coherent(sysdev, DMA_BIT_MASK(32));
+ if (ret)
+ return ret;
+ }
+
+ xhci_pm_runtime_init(&pdev->dev);
+
+ pm_runtime_set_active(&pdev->dev);
+ pm_runtime_enable(&pdev->dev);
+ pm_runtime_get_noresume(&pdev->dev);
+
+ hcd = __usb_create_hcd(driver, sysdev, &pdev->dev,
+ dev_name(&pdev->dev), NULL);
+ if (!hcd) {
+ ret = -ENOMEM;
+ goto disable_runtime;
+ }
+ hcd->skip_phy_initialization = 1;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ hcd->regs = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(hcd->regs)) {
+ ret = PTR_ERR(hcd->regs);
+ goto put_hcd;
+ }
+
+ hcd->rsrc_start = res->start;
+ hcd->rsrc_len = resource_size(res);
+
+ xhci = hcd_to_xhci(hcd);
+
+ g_xhci_exynos = devm_kzalloc(&pdev->dev, sizeof(struct xhci_hcd_exynos), GFP_KERNEL);
+#ifdef CONFIG_SND_EXYNOS_USB_AUDIO
+ g_hwinfo = devm_kzalloc(hcd->self.sysdev, sizeof(struct hcd_hw_info), GFP_KERNEL);
+#endif
+
+ ret = xhci_vendor_init(xhci);
+ if (ret)
+ goto put_hcd;
+
+ if (g_xhci_exynos)
+ xhci_exynos = g_xhci_exynos;
+ else
+ goto put_hcd;
+
+ xhci_exynos->dev = &pdev->dev;
+
+ xhci_exynos->hcd = (struct usb_hcd *)platform_get_drvdata(pdev);
+ platform_set_drvdata(pdev, xhci_exynos);
+
+ spin_lock_init(&xhci_exynos->xhcioff_lock);
+
+ xhci_exynos->port_off_done = 0;
+ xhci_exynos->portsc_control_priority = 0;
+ xhci_exynos->usb3_phy_control = true;
+ xhci_exynos->dp_use = 0;
+
+ xhci_exynos->usb3_portsc = hcd->regs + PORTSC_OFFSET;
+ if (xhci_exynos->port_set_delayed) {
+ pr_info("port power set delayed\n");
+ xhci_exynos_portsc_power_off(xhci_exynos->usb3_portsc, 0, 2);
+ xhci_exynos->port_set_delayed = 0;
+ }
+
+ xhci_exynos->main_wakelock = main_wakelock;
+ xhci_exynos->shared_wakelock = shared_wakelock;
+
+ xhci_exynos_register_notify();
+
+ /*
+ * Not all platforms have clks so it is not an error if the
+ * clock do not exist.
+ */
+ xhci->reg_clk = devm_clk_get_optional(&pdev->dev, "reg");
+ if (IS_ERR(xhci->reg_clk)) {
+ ret = PTR_ERR(xhci->reg_clk);
+ goto put_hcd;
+ }
+
+ ret = clk_prepare_enable(xhci->reg_clk);
+ if (ret)
+ goto put_hcd;
+
+ xhci->clk = devm_clk_get_optional(&pdev->dev, NULL);
+ if (IS_ERR(xhci->clk)) {
+ ret = PTR_ERR(xhci->clk);
+ goto disable_reg_clk;
+ }
+
+ ret = clk_prepare_enable(xhci->clk);
+ if (ret)
+ goto disable_reg_clk;
+
+ priv = hcd_to_xhci_exynos_priv(hcd);
+ priv->xhci_exynos = xhci_exynos;
+
+ device_wakeup_enable(hcd->self.controller);
+
+ xhci->main_hcd = hcd;
+ xhci->shared_hcd = __usb_create_hcd(driver, sysdev, &pdev->dev,
+ dev_name(&pdev->dev), hcd);
+ if (!xhci->shared_hcd) {
+ ret = -ENOMEM;
+ goto disable_clk;
+ }
+ xhci->shared_hcd->skip_phy_initialization = 1;
+
+ xhci_exynos->shared_hcd = xhci->shared_hcd;
+
+ /* imod_interval is the interrupt moderation value in nanoseconds. */
+ xhci->imod_interval = 40000;
+
+ /* Iterate over all parent nodes for finding quirks */
+ for (tmpdev = &pdev->dev; tmpdev; tmpdev = tmpdev->parent) {
+
+ if (device_property_read_bool(tmpdev, "usb2-lpm-disable"))
+ xhci->quirks |= XHCI_HW_LPM_DISABLE;
+
+ if (device_property_read_bool(tmpdev, "usb3-lpm-capable"))
+ xhci->quirks |= XHCI_LPM_SUPPORT;
+
+ if (device_property_read_bool(tmpdev, "quirk-broken-port-ped"))
+ xhci->quirks |= XHCI_BROKEN_PORT_PED;
+
+ device_property_read_u32(tmpdev, "imod-interval-ns",
+ &xhci->imod_interval);
+ }
+
+ hcd->usb_phy = devm_usb_get_phy_by_phandle(sysdev, "usb-phy", 0);
+ if (IS_ERR(hcd->usb_phy)) {
+ ret = PTR_ERR(hcd->usb_phy);
+ if (ret == -EPROBE_DEFER)
+ goto put_usb3_hcd;
+ hcd->usb_phy = NULL;
+ } else {
+ ret = usb_phy_init(hcd->usb_phy);
+ if (ret)
+ goto put_usb3_hcd;
+ }
+
+ /* Get USB2.0 PHY for main hcd */
+ if (parent) {
+ xhci_exynos->phy_usb2 = devm_phy_get(parent, "usb2-phy");
+ if (IS_ERR_OR_NULL(xhci_exynos->phy_usb2)) {
+ xhci_exynos->phy_usb2 = NULL;
+ dev_err(&pdev->dev,
+ "%s: failed to get phy\n", __func__);
+ }
+ }
+
+ /* Get USB3.0 PHY to tune the PHY */
+ if (parent) {
+ xhci_exynos->phy_usb3 =
+ devm_phy_get(parent, "usb3-phy");
+ if (IS_ERR_OR_NULL(xhci_exynos->phy_usb3)) {
+ xhci_exynos->phy_usb3 = NULL;
+ dev_err(&pdev->dev,
+ "%s: failed to get phy\n", __func__);
+ }
+ }
+
+ ret = of_property_read_u32(parent->of_node, "xhci_l2_support", &value);
+ if (ret == 0 && value == 1)
+ xhci->quirks |= XHCI_L2_SUPPORT;
+ else {
+ dev_err(&pdev->dev,
+ "can't get xhci l2 support, error = %d\n", ret);
+ }
+
+#ifdef CONFIG_SND_EXYNOS_USB_AUDIO
+ ret = of_property_read_u32(parent->of_node,
+ "xhci_use_uram_for_audio", &value);
+ if (ret == 0 && value == 1) {
+ /*
+ * Check URAM address. At least the following address should
+ * be defined.(Otherwise, URAM feature will be disabled.)
+ */
+ if (EXYNOS_URAM_DCBAA_ADDR == 0x0 ||
+ EXYNOS_URAM_ABOX_ERST_SEG_ADDR == 0x0 ||
+ EXYNOS_URAM_ABOX_EVT_RING_ADDR == 0x0 ||
+ EXYNOS_URAM_DEVICE_CTX_ADDR == 0x0 ||
+ EXYNOS_URAM_ISOC_OUT_RING_ADDR == 0x0) {
+ dev_info(&pdev->dev,
+ "Some URAM addresses are not defiend!\n");
+ goto skip_uram;
+ }
+
+ dev_info(&pdev->dev, "Support URAM for USB audio.\n");
+ xhci->quirks |= XHCI_USE_URAM_FOR_EXYNOS_AUDIO;
+ /* Initialization Default Value */
+ xhci_exynos->exynos_uram_ctx_alloc = false;
+ xhci_exynos->exynos_uram_isoc_out_alloc = false;
+ xhci_exynos->exynos_uram_isoc_in_alloc = false;
+ xhci_exynos->usb_audio_ctx_addr = NULL;
+ xhci_exynos->usb_audio_isoc_out_addr = NULL;
+ xhci_exynos->usb_audio_isoc_in_addr = NULL;
+ } else {
+ dev_err(&pdev->dev, "URAM is not used.\n");
+ }
+skip_uram:
+
+ xhci_exynos->xhci_alloc = &xhci_pre_alloc;
+
+#endif
+
+ hcd->tpl_support = of_usb_host_tpl_support(sysdev->of_node);
+ xhci->shared_hcd->tpl_support = hcd->tpl_support;
+ ret = usb_add_hcd(hcd, irq, IRQF_SHARED);
+ if (ret)
+ goto disable_usb_phy;
+
+ /* Set port_dev quirks for reduce port initialize time */
+ hdev = xhci->main_hcd->self.root_hub;
+ hub = usb_get_intfdata(hdev->actconfig->interface[0]);
+ port_dev = hub->ports[0];
+ port_dev->quirks |= USB_PORT_QUIRK_FAST_ENUM;
+
+ if (HCC_MAX_PSA(xhci->hcc_params) >= 4)
+ xhci->shared_hcd->can_do_streams = 1;
+
+ ret = usb_add_hcd(xhci->shared_hcd, irq, IRQF_SHARED);
+ if (ret)
+ goto dealloc_usb2_hcd;
+
+ /* Set port_dev quirks for reduce port initialize time */
+ hdev = xhci->shared_hcd->self.root_hub;
+ hub = usb_get_intfdata(hdev->actconfig->interface[0]);
+ if (hub) {
+ port_dev = hub->ports[0];
+ port_dev->quirks |= USB_PORT_QUIRK_FAST_ENUM;
+ }
+
+#ifdef CONFIG_SND_EXYNOS_USB_AUDIO
+ ret = of_property_read_u32(parent->of_node,
+ "usb_audio_offloading", &value);
+ if (ret == 0 && value == 1) {
+ ret = exynos_usb_audio_init(parent, pdev);
+ if (ret) {
+ dev_err(&pdev->dev, "USB Audio INIT fail\n");
+ goto dealloc_usb2_hcd;
+ }
+ dev_info(&pdev->dev, "USB Audio offloading is supported\n");
+ } else
+ dev_err(&pdev->dev, "No usb offloading, err = %d\n", ret);
+
+ xhci_exynos->out_dma = xhci_data.out_data_dma;
+ xhci_exynos->out_addr = xhci_data.out_data_addr;
+ xhci_exynos->in_dma = xhci_data.in_data_dma;
+ xhci_exynos->in_addr = xhci_data.in_data_addr;
+#endif
+
+ device_enable_async_suspend(&pdev->dev);
+ pm_runtime_put_noidle(&pdev->dev);
+
+ device_set_wakeup_enable(&xhci->main_hcd->self.root_hub->dev, 1);
+
+#ifdef CONFIG_EXYNOS_USBDRD_PHY30
+ device_set_wakeup_enable(&xhci->shared_hcd->self.root_hub->dev, 1);
+#else
+ device_set_wakeup_enable(&xhci->shared_hcd->self.root_hub->dev, 0);
+#endif
+
+ /*
+ * Prevent runtime pm from being on as default, users should enable
+ * runtime pm using power/control in sysfs.
+ */
+ pm_runtime_forbid(&pdev->dev);
+
+ return 0;
+
+
+dealloc_usb2_hcd:
+ usb_remove_hcd(hcd);
+
+disable_usb_phy:
+ usb_phy_shutdown(hcd->usb_phy);
+
+put_usb3_hcd:
+ usb_put_hcd(xhci->shared_hcd);
+
+disable_clk:
+ clk_disable_unprepare(xhci->clk);
+
+disable_reg_clk:
+ clk_disable_unprepare(xhci->reg_clk);
+
+put_hcd:
+ xhci_exynos_unregister_notify();
+ usb_put_hcd(hcd);
+
+disable_runtime:
+ pm_runtime_put_noidle(&pdev->dev);
+ pm_runtime_disable(&pdev->dev);
+
+ if (main_wakelock) {
+ wakeup_source_unregister(main_wakelock);
+ pr_err("%s: unregister main_wakelock", __func__);
+ }
+ if (shared_wakelock) {
+ wakeup_source_unregister(shared_wakelock);
+ pr_err("%s: unregister shared_wakelock", __func__);
+ }
+
+ return ret;
+}
+
+static int xhci_exynos_remove(struct platform_device *dev)
+{
+ struct xhci_hcd_exynos *xhci_exynos = platform_get_drvdata(dev);
+ struct usb_hcd *hcd = xhci_exynos->hcd;
+ struct xhci_hcd *xhci = hcd_to_xhci(hcd);
+#ifdef CONFIG_SND_EXYNOS_USB_AUDIO
+ struct device *parent = dev->dev.parent;
+#endif
+ struct clk *clk = xhci->clk;
+ struct clk *reg_clk = xhci->reg_clk;
+ struct usb_hcd *shared_hcd = xhci->shared_hcd;
+ struct usb_device *rhdev = hcd->self.root_hub;
+ struct usb_device *srhdev = shared_hcd->self.root_hub;
+ struct usb_device *udev;
+ int port, need_wait, timeout;
+
+ dev_info(&dev->dev, "XHCI PLAT REMOVE\n");
+
+ pm_runtime_get_sync(&dev->dev);
+ xhci->xhc_state |= XHCI_STATE_REMOVING;
+
+ if (xhci_exynos->port_state == PORT_USB2)
+ usb_power_notify_control(0, 1);
+
+ xhci_exynos_port_power_set(1, 3);
+
+ xhci_exynos->usb3_portsc = NULL;
+ xhci_exynos->port_set_delayed = 0;
+
+#ifdef CONFIG_SND_EXYNOS_USB_AUDIO
+ xhci_exynos->xhci_alloc->offset = 0;
+ dev_info(&dev->dev, "WAKE UNLOCK\n");
+#endif
+
+ __pm_relax(xhci_exynos->main_wakelock);
+
+ __pm_relax(xhci_exynos->shared_wakelock);
+
+ xhci_exynos_unregister_notify();
+
+ if (!rhdev || !srhdev)
+ goto remove_hcd;
+
+ /* check all ports */
+ for (timeout = 0; timeout < XHCI_HUB_EVENT_TIMEOUT; timeout++) {
+ need_wait = false;
+ usb_hub_for_each_child(rhdev, port, udev) {
+ if (udev && udev->devnum != -1)
+ need_wait = true;
+ }
+ if (need_wait == false) {
+ usb_hub_for_each_child(srhdev, port, udev) {
+ if (udev && udev->devnum != -1)
+ need_wait = true;
+ }
+ }
+ if (need_wait == true) {
+ usleep_range(20000, 22000);
+ timeout += 20;
+ xhci_info(xhci, "Waiting USB hub disconnect\n");
+ } else {
+ xhci_info(xhci, "device disconnect all done\n");
+ break;
+ }
+ }
+
+remove_hcd:
+ usb_remove_hcd(shared_hcd);
+ xhci->shared_hcd = NULL;
+ usb_phy_shutdown(hcd->usb_phy);
+ /*
+ * In usb_remove_hcd, phy_exit is called if phy is not NULL.
+ * However, in the case that PHY was turn on or off as runtime PM,
+ * PHY sould not exit at this time. So, to prevent the PHY exit,
+ * PHY pointer have to be NULL.
+ */
+#ifdef CONFIG_SND_EXYNOS_USB_AUDIO
+ if (parent && xhci_exynos->phy_usb2)
+ xhci_exynos->phy_usb2 = NULL;
+
+ if (parent && xhci_exynos->phy_usb3)
+ xhci_exynos->phy_usb3 = NULL;
+#endif
+ usb_remove_hcd(hcd);
+
+ xhci_vendor_cleanup(xhci);
+ wakeup_source_unregister(xhci_exynos->main_wakelock);
+ wakeup_source_unregister(xhci_exynos->shared_wakelock);
+
+ devm_iounmap(&dev->dev, hcd->regs);
+ usb_put_hcd(shared_hcd);
+
+ clk_disable_unprepare(clk);
+ clk_disable_unprepare(reg_clk);
+ usb_put_hcd(hcd);
+
+ pm_runtime_disable(&dev->dev);
+ pm_runtime_put_noidle(&dev->dev);
+ pm_runtime_set_suspended(&dev->dev);
+
+ return 0;
+}
+
+/*
+static void xhci_exynos_shutdown(struct platform_device *dev)
+{
+ struct xhci_hcd_exynos *xhci_exynos = platform_get_drvdata(dev);
+ struct usb_hcd *hcd = xhci_exynos->hcd;
+
+ platform_set_drvdata(dev, hcd);
+ usb_hcd_platform_shutdown(dev);
+ platform_set_drvdata(dev, xhci_exynos);
+}
+*/
+extern u32 otg_is_connect(void);
+static int __maybe_unused xhci_exynos_suspend(struct device *dev)
+{
+ struct xhci_hcd_exynos *xhci_exynos = dev_get_drvdata(dev);
+ struct usb_hcd *hcd = xhci_exynos->hcd;
+ struct xhci_hcd *xhci = hcd_to_xhci(hcd);
+ int ret = 0;
+
+ if (otg_is_connect() == 1) { /* If it is OTG_CONNECT_ONLY */
+ ret = xhci_priv_suspend_quirk(hcd);
+ if (ret)
+ return ret;
+ /*
+ * xhci_suspend() needs `do_wakeup` to know whether host is allowed
+ * to do wakeup during suspend.
+ */
+ pr_info("[%s]: xhci_suspend!\n", __func__);
+ ret = xhci_suspend(xhci, device_may_wakeup(dev));
+ } else { /* Enable HS ReWA */
+ exynos_usbdrd_phy_vendor_set(xhci_exynos->phy_usb2, 1, 0);
+#ifdef CONFIG_EXYNOS_USBDRD_PHY30
+ /* Enable SS ReWA */
+ exynos_usbdrd_phy_vendor_set(xhci_exynos->phy_usb3, 1, 0);
+#endif
+ is_rewa_enabled = 1;
+ }
+ usb_dr_role_control(0);
+
+ return ret;
+}
+
+static int __maybe_unused xhci_exynos_resume(struct device *dev)
+{
+ struct xhci_hcd_exynos *xhci_exynos = dev_get_drvdata(dev);
+ struct usb_hcd *hcd = xhci_exynos->hcd;
+ struct xhci_hcd *xhci = hcd_to_xhci(hcd);
+ int ret;
+
+ ret = xhci_priv_resume_quirk(hcd);
+ if (ret)
+ return ret;
+
+ if (otg_is_connect() == 1) { /* If it is OTG_CONNECT_ONLY */
+ pr_info("[%s]: xhci_resume!\n", __func__);
+ ret = xhci_resume(xhci, 0);
+
+ if (ret)
+ return ret;
+ }
+
+ if (is_rewa_enabled == 1) {
+#ifdef CONFIG_EXYNOS_USBDRD_PHY30
+ /* Disable SS ReWA */
+ exynos_usbdrd_phy_vendor_set(xhci_exynos->phy_usb3, 1, 1);
+#endif
+ /* Disablee HS ReWA */
+ exynos_usbdrd_phy_vendor_set(xhci_exynos->phy_usb2, 1, 1);
+ exynos_usbdrd_phy_vendor_set(xhci_exynos->phy_usb2, 0, 0);
+ is_rewa_enabled = 0;
+ }
+ usb_dr_role_control(1);
+
+ return ret;
+}
+
+static const struct dev_pm_ops xhci_plat_pm_ops = {
+ SET_SYSTEM_SLEEP_PM_OPS(xhci_exynos_suspend, xhci_exynos_resume)
+};
+
+static const struct acpi_device_id usb_xhci_acpi_match[] = {
+ /* XHCI-compliant USB Controller */
+ { "PNP0D10", },
+ { }
+};
+MODULE_DEVICE_TABLE(acpi, usb_xhci_acpi_match);
+
+static struct platform_driver usb_xhci_driver = {
+ .probe = xhci_exynos_probe,
+ .remove = xhci_exynos_remove,
+ /* Host is supposed to removed in usb_reboot_noti.
+ * Thats's why we don't need xhci_exynos_shutdown.
+ * .shutdown = xhci_exynos_shutdown,
+ */
+ .driver = {
+ .name = "xhci-hcd-exynos",
+ .pm = &xhci_plat_pm_ops,
+ .of_match_table = of_match_ptr(usb_xhci_of_match),
+ .acpi_match_table = ACPI_PTR(usb_xhci_acpi_match),
+ .dev_groups = xhci_exynos_groups,
+ },
+};
+MODULE_ALIAS("platform:xhci-hcd-exynos");
+
+static int __init xhci_exynos_init(void)
+{
+ xhci_init_driver(&xhci_exynos_hc_driver, &xhci_exynos_overrides);
+ return platform_driver_register(&usb_xhci_driver);
+}
+module_init(xhci_exynos_init);
+
+static void __exit xhci_exynos_exit(void)
+{
+ platform_driver_unregister(&usb_xhci_driver);
+}
+module_exit(xhci_exynos_exit);
+
+MODULE_DESCRIPTION("xHCI Exynos Platform Host Controller Driver");
+MODULE_LICENSE("GPL");
diff --git a/drivers/usb/host/xhci-exynos.h b/drivers/usb/host/xhci-exynos.h
new file mode 100644
index 000000000000..51a872e19fa5
--- /dev/null
+++ b/drivers/usb/host/xhci-exynos.h
@@ -0,0 +1,150 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * xhci-exynos.h - xHCI host controller driver platform Bus Glue for Exynos.
+ *
+ * Copyright (C) 2022 Samsung Electronics Incorporated - http://www.samsung.com
+ * Author: Daehwan Jung <dh10.jung@samsung.com>
+ *
+ * A lot of code borrowed from the Linux xHCI driver.
+ */
+
+#include "xhci.h"
+#include "../dwc3/dwc3-exynos.h"
+
+/*
+ * Sometimes deadlock occurred between hub_event and remove_hcd.
+ * In order to prevent it, waiting for completion of hub_event was added.
+ * This is a timeout (300msec) value for the waiting.
+ */
+#define XHCI_HUB_EVENT_TIMEOUT (300)
+
+#define XHCI_USE_URAM_FOR_EXYNOS_AUDIO BIT_ULL(62)
+#define XHCI_L2_SUPPORT BIT_ULL(63)
+
+#define PORTSC_OFFSET 0x430
+
+#ifdef CONFIG_SND_EXYNOS_USB_AUDIO
+
+/* EXYNOS uram memory map */
+#if defined(CONFIG_SOC_S5E9925)
+#define EXYNOS_URAM_ABOX_EVT_RING_ADDR 0x02a00000
+#define EXYNOS_URAM_ISOC_OUT_RING_ADDR 0x02a01000
+#define EXYNOS_URAM_ISOC_IN_RING_ADDR 0x02a02000
+#define EXYNOS_URAM_DEVICE_CTX_ADDR 0x02a03000
+#define EXYNOS_URAM_DCBAA_ADDR 0x02a03880
+#define EXYNOS_URAM_ABOX_ERST_SEG_ADDR 0x02a03C80
+#elif defined(CONFIG_SOC_S5E8825)
+#define EXYNOS_URAM_ABOX_EVT_RING_ADDR 0x13300000
+#define EXYNOS_URAM_ISOC_OUT_RING_ADDR 0x13301000
+#define EXYNOS_URAM_ISOC_IN_RING_ADDR 0x13302000
+#define EXYNOS_URAM_DEVICE_CTX_ADDR 0x13303000
+#define EXYNOS_URAM_DCBAA_ADDR 0x13303880
+#define EXYNOS_URAM_ABOX_ERST_SEG_ADDR 0x13303C80
+#else
+#error
+#endif
+#endif
+
+enum usb_port_state {
+ PORT_EMPTY = 0, /* OTG only */
+ PORT_USB2, /* usb 2.0 device only */
+ PORT_USB3, /* usb 3.0 device only */
+ PORT_HUB, /* usb hub single */
+ PORT_DP /* DP device */
+};
+
+struct xhci_hcd_exynos {
+#ifdef CONFIG_SND_EXYNOS_USB_AUDIO
+ struct xhci_intr_reg __iomem *ir_set_audio;
+#endif
+
+#ifdef CONFIG_SND_EXYNOS_USB_AUDIO
+ struct xhci_ring *event_ring_audio;
+ struct xhci_erst erst_audio;
+ dma_addr_t save_dma;
+ void *save_addr;
+ dma_addr_t out_dma;
+ void *out_addr;
+ dma_addr_t in_dma;
+ void *in_addr;
+#endif
+ struct device *dev;
+ struct usb_hcd *hcd;
+ struct usb_hcd *shared_hcd;
+
+ struct wakeup_source *main_wakelock; /* Wakelock for HS HCD */
+ struct wakeup_source *shared_wakelock; /* Wakelock for SS HCD */
+
+ void __iomem *usb3_portsc;
+ spinlock_t xhcioff_lock;
+ int port_off_done;
+ int port_set_delayed;
+ u32 portsc_control_priority;
+ enum usb_port_state port_state;
+ int dp_use;
+ int usb3_phy_control;
+
+ struct usb_xhci_pre_alloc *xhci_alloc;
+ struct phy *phy_usb2;
+ struct phy *phy_usb3;
+
+ /* This flag is used to check first allocation for URAM */
+ bool exynos_uram_ctx_alloc;
+ bool exynos_uram_isoc_out_alloc;
+ bool exynos_uram_isoc_in_alloc;
+ u8 *usb_audio_ctx_addr;
+ u8 *usb_audio_isoc_out_addr;
+ u8 *usb_audio_isoc_in_addr;
+
+};
+
+struct usb_phy_roothub {
+ struct phy *phy;
+ struct list_head list;
+};
+
+struct xhci_exynos_priv {
+ const char *firmware_name;
+ unsigned long long quirks;
+ struct xhci_vendor_data *vendor_data;
+ int (*plat_setup)(struct usb_hcd *hcd);
+ void (*plat_start)(struct usb_hcd *hcd);
+ int (*init_quirk)(struct usb_hcd *hcd);
+ int (*suspend_quirk)(struct usb_hcd *hcd);
+ int (*resume_quirk)(struct usb_hcd *hcd);
+ struct xhci_hcd_exynos *xhci_exynos;
+};
+
+#define hcd_to_xhci_exynos_priv(h) ((struct xhci_exynos_priv *)hcd_to_xhci(h)->priv)
+#define xhci_to_exynos_priv(x) ((struct xhci_exynos_priv *)(x)->priv)
+
+extern int is_otg_only;
+extern int exynos_usbdrd_phy_vendor_set(struct phy *phy, int is_enable,
+ int is_cancel);
+extern int get_idle_ip_index(void);
+
+#ifdef CONFIG_SND_EXYNOS_USB_AUDIO
+int xhci_store_hw_info(struct usb_hcd *hcd, struct usb_device *udev);
+int xhci_set_deq(struct xhci_hcd *xhci, struct xhci_container_ctx *ctx,
+ unsigned int last_ep, struct usb_device *udev);
+extern void xhci_remove_stream_mapping(struct xhci_ring *ring);
+extern struct hcd_hw_info *g_hwinfo;
+extern int xhci_check_trb_in_td_math(struct xhci_hcd *xhci);
+void xhci_exynos_ring_free(struct xhci_hcd *xhci, struct xhci_ring *ring);
+extern void xhci_segment_free(struct xhci_hcd *xhci, struct xhci_segment *seg);
+extern void xhci_link_segments(struct xhci_segment *prev, struct xhci_segment *next,
+ enum xhci_ring_type type, bool chain_links);
+extern void xhci_initialize_ring_info(struct xhci_ring *ring,
+ unsigned int cycle_state);
+#endif
+
+int xhci_hub_check_speed(struct usb_hcd *hcd);
+int xhci_check_usbl2_support(struct usb_hcd *hcd);
+int xhci_wake_lock(struct usb_hcd *hcd, int is_lock);
+void xhci_usb_parse_endpoint(struct usb_device *udev, struct usb_endpoint_descriptor *desc,
+ int size);
+
+extern int exynos_usbdrd_phy_vendor_set(struct phy *phy, int is_enable,
+ int is_cancel);
+extern int exynos_usbdrd_phy_tune(struct phy *phy, int phy_state);
+void usb_power_notify_control(int owner, int on);
--
2.31.1
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