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path: root/drivers/usb/host/xhci-dbgcap.h
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Diffstat (limited to 'drivers/usb/host/xhci-dbgcap.h')
-rw-r--r--drivers/usb/host/xhci-dbgcap.h229
1 files changed, 229 insertions, 0 deletions
diff --git a/drivers/usb/host/xhci-dbgcap.h b/drivers/usb/host/xhci-dbgcap.h
new file mode 100644
index 000000000000..e66ea0748ba3
--- /dev/null
+++ b/drivers/usb/host/xhci-dbgcap.h
@@ -0,0 +1,229 @@
+
+/**
+ * xhci-dbgcap.h - xHCI debug capability support
+ *
+ * Copyright (C) 2017 Intel Corporation
+ *
+ * Author: Lu Baolu <baolu.lu@linux.intel.com>
+ */
+#ifndef __LINUX_XHCI_DBGCAP_H
+#define __LINUX_XHCI_DBGCAP_H
+
+#include <linux/tty.h>
+#include <linux/kfifo.h>
+
+struct dbc_regs {
+ __le32 capability;
+ __le32 doorbell;
+ __le32 ersts; /* Event Ring Segment Table Size*/
+ __le32 __reserved_0; /* 0c~0f reserved bits */
+ __le64 erstba; /* Event Ring Segment Table Base Address */
+ __le64 erdp; /* Event Ring Dequeue Pointer */
+ __le32 control;
+ __le32 status;
+ __le32 portsc; /* Port status and control */
+ __le32 __reserved_1; /* 2b~28 reserved bits */
+ __le64 dccp; /* Debug Capability Context Pointer */
+ __le32 devinfo1; /* Device Descriptor Info Register 1 */
+ __le32 devinfo2; /* Device Descriptor Info Register 2 */
+};
+
+struct dbc_info_context {
+ __le64 string0;
+ __le64 manufacturer;
+ __le64 product;
+ __le64 serial;
+ __le32 length;
+ __le32 __reserved_0[7];
+};
+
+#define DBC_CTRL_DBC_RUN BIT(0)
+#define DBC_CTRL_PORT_ENABLE BIT(1)
+#define DBC_CTRL_HALT_OUT_TR BIT(2)
+#define DBC_CTRL_HALT_IN_TR BIT(3)
+#define DBC_CTRL_DBC_RUN_CHANGE BIT(4)
+#define DBC_CTRL_DBC_ENABLE BIT(31)
+#define DBC_CTRL_MAXBURST(p) (((p) >> 16) & 0xff)
+#define DBC_DOOR_BELL_TARGET(p) (((p) & 0xff) << 8)
+
+#define DBC_MAX_PACKET 1024
+#define DBC_MAX_STRING_LENGTH 64
+#define DBC_STRING_MANUFACTURER "Linux Foundation"
+#define DBC_STRING_PRODUCT "Linux USB Debug Target"
+#define DBC_STRING_SERIAL "0001"
+#define DBC_CONTEXT_SIZE 64
+
+/*
+ * Port status:
+ */
+#define DBC_PORTSC_CONN_STATUS BIT(0)
+#define DBC_PORTSC_PORT_ENABLED BIT(1)
+#define DBC_PORTSC_CONN_CHANGE BIT(17)
+#define DBC_PORTSC_RESET_CHANGE BIT(21)
+#define DBC_PORTSC_LINK_CHANGE BIT(22)
+#define DBC_PORTSC_CONFIG_CHANGE BIT(23)
+
+struct dbc_str_descs {
+ char string0[DBC_MAX_STRING_LENGTH];
+ char manufacturer[DBC_MAX_STRING_LENGTH];
+ char product[DBC_MAX_STRING_LENGTH];
+ char serial[DBC_MAX_STRING_LENGTH];
+};
+
+#define DBC_PROTOCOL 1 /* GNU Remote Debug Command */
+#define DBC_VENDOR_ID 0x1d6b /* Linux Foundation 0x1d6b */
+#define DBC_PRODUCT_ID 0x0010 /* device 0010 */
+#define DBC_DEVICE_REV 0x0010 /* 0.10 */
+
+enum dbc_state {
+ DS_DISABLED = 0,
+ DS_INITIALIZED,
+ DS_ENABLED,
+ DS_CONNECTED,
+ DS_CONFIGURED,
+ DS_STALLED,
+};
+
+struct dbc_request {
+ void *buf;
+ unsigned int length;
+ dma_addr_t dma;
+ void (*complete)(struct xhci_hcd *xhci,
+ struct dbc_request *req);
+ struct list_head list_pool;
+ int status;
+ unsigned int actual;
+
+ struct dbc_ep *dep;
+ struct list_head list_pending;
+ dma_addr_t trb_dma;
+ union xhci_trb *trb;
+ unsigned direction:1;
+};
+
+struct dbc_ep {
+ struct xhci_dbc *dbc;
+ struct list_head list_pending;
+ struct xhci_ring *ring;
+ unsigned direction:1;
+};
+
+#define DBC_QUEUE_SIZE 16
+#define DBC_WRITE_BUF_SIZE 8192
+
+/*
+ * Private structure for DbC hardware state:
+ */
+struct dbc_port {
+ struct tty_port port;
+ spinlock_t port_lock; /* port access */
+
+ struct list_head read_pool;
+ struct list_head read_queue;
+ unsigned int n_read;
+ struct tasklet_struct push;
+
+ struct list_head write_pool;
+ struct kfifo write_fifo;
+
+ bool registered;
+ struct dbc_ep *in;
+ struct dbc_ep *out;
+};
+
+struct xhci_dbc {
+ spinlock_t lock; /* device access */
+ struct xhci_hcd *xhci;
+ struct dbc_regs __iomem *regs;
+ struct xhci_ring *ring_evt;
+ struct xhci_ring *ring_in;
+ struct xhci_ring *ring_out;
+ struct xhci_erst erst;
+ struct xhci_container_ctx *ctx;
+
+ struct dbc_str_descs *string;
+ dma_addr_t string_dma;
+ size_t string_size;
+
+ enum dbc_state state;
+ struct delayed_work event_work;
+ unsigned resume_required:1;
+ struct dbc_ep eps[2];
+
+ struct dbc_port port;
+};
+
+#define dbc_bulkout_ctx(d) \
+ ((struct xhci_ep_ctx *)((d)->ctx->bytes + DBC_CONTEXT_SIZE))
+#define dbc_bulkin_ctx(d) \
+ ((struct xhci_ep_ctx *)((d)->ctx->bytes + DBC_CONTEXT_SIZE * 2))
+#define dbc_bulkout_enq(d) \
+ xhci_trb_virt_to_dma((d)->ring_out->enq_seg, (d)->ring_out->enqueue)
+#define dbc_bulkin_enq(d) \
+ xhci_trb_virt_to_dma((d)->ring_in->enq_seg, (d)->ring_in->enqueue)
+#define dbc_epctx_info2(t, p, b) \
+ cpu_to_le32(EP_TYPE(t) | MAX_PACKET(p) | MAX_BURST(b))
+#define dbc_ep_dma_direction(d) \
+ ((d)->direction ? DMA_FROM_DEVICE : DMA_TO_DEVICE)
+
+#define BULK_OUT 0
+#define BULK_IN 1
+#define EPID_OUT 2
+#define EPID_IN 3
+
+enum evtreturn {
+ EVT_ERR = -1,
+ EVT_DONE,
+ EVT_GSER,
+ EVT_DISC,
+};
+
+static inline struct dbc_ep *get_in_ep(struct xhci_hcd *xhci)
+{
+ struct xhci_dbc *dbc = xhci->dbc;
+
+ return &dbc->eps[BULK_IN];
+}
+
+static inline struct dbc_ep *get_out_ep(struct xhci_hcd *xhci)
+{
+ struct xhci_dbc *dbc = xhci->dbc;
+
+ return &dbc->eps[BULK_OUT];
+}
+
+#ifdef CONFIG_USB_XHCI_DBGCAP
+int xhci_dbc_init(struct xhci_hcd *xhci);
+void xhci_dbc_exit(struct xhci_hcd *xhci);
+int xhci_dbc_tty_register_driver(struct xhci_hcd *xhci);
+void xhci_dbc_tty_unregister_driver(void);
+int xhci_dbc_tty_register_device(struct xhci_hcd *xhci);
+void xhci_dbc_tty_unregister_device(struct xhci_hcd *xhci);
+struct dbc_request *dbc_alloc_request(struct dbc_ep *dep, gfp_t gfp_flags);
+void dbc_free_request(struct dbc_ep *dep, struct dbc_request *req);
+int dbc_ep_queue(struct dbc_ep *dep, struct dbc_request *req, gfp_t gfp_flags);
+#ifdef CONFIG_PM
+int xhci_dbc_suspend(struct xhci_hcd *xhci);
+int xhci_dbc_resume(struct xhci_hcd *xhci);
+#endif /* CONFIG_PM */
+#else
+static inline int xhci_dbc_init(struct xhci_hcd *xhci)
+{
+ return 0;
+}
+
+static inline void xhci_dbc_exit(struct xhci_hcd *xhci)
+{
+}
+
+static inline int xhci_dbc_suspend(struct xhci_hcd *xhci)
+{
+ return 0;
+}
+
+static inline int xhci_dbc_resume(struct xhci_hcd *xhci)
+{
+ return 0;
+}
+#endif /* CONFIG_USB_XHCI_DBGCAP */
+#endif /* __LINUX_XHCI_DBGCAP_H */