231 lines
5.6 KiB
C
231 lines
5.6 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/**
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* xhci-dbgcap.h - xHCI debug capability support
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*
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* Copyright (C) 2017 Intel Corporation
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*
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* Author: Lu Baolu <baolu.lu@linux.intel.com>
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*/
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#ifndef __LINUX_XHCI_DBGCAP_H
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#define __LINUX_XHCI_DBGCAP_H
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#include <linux/tty.h>
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#include <linux/kfifo.h>
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struct dbc_regs {
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__le32 capability;
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__le32 doorbell;
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__le32 ersts; /* Event Ring Segment Table Size*/
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__le32 __reserved_0; /* 0c~0f reserved bits */
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__le64 erstba; /* Event Ring Segment Table Base Address */
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__le64 erdp; /* Event Ring Dequeue Pointer */
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__le32 control;
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__le32 status;
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__le32 portsc; /* Port status and control */
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__le32 __reserved_1; /* 2b~28 reserved bits */
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__le64 dccp; /* Debug Capability Context Pointer */
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__le32 devinfo1; /* Device Descriptor Info Register 1 */
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__le32 devinfo2; /* Device Descriptor Info Register 2 */
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};
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struct dbc_info_context {
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__le64 string0;
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__le64 manufacturer;
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__le64 product;
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__le64 serial;
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__le32 length;
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__le32 __reserved_0[7];
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};
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#define DBC_CTRL_DBC_RUN BIT(0)
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#define DBC_CTRL_PORT_ENABLE BIT(1)
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#define DBC_CTRL_HALT_OUT_TR BIT(2)
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#define DBC_CTRL_HALT_IN_TR BIT(3)
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#define DBC_CTRL_DBC_RUN_CHANGE BIT(4)
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#define DBC_CTRL_DBC_ENABLE BIT(31)
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#define DBC_CTRL_MAXBURST(p) (((p) >> 16) & 0xff)
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#define DBC_DOOR_BELL_TARGET(p) (((p) & 0xff) << 8)
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#define DBC_MAX_PACKET 1024
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#define DBC_MAX_STRING_LENGTH 64
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#define DBC_STRING_MANUFACTURER "Linux Foundation"
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#define DBC_STRING_PRODUCT "Linux USB Debug Target"
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#define DBC_STRING_SERIAL "0001"
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#define DBC_CONTEXT_SIZE 64
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/*
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* Port status:
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*/
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#define DBC_PORTSC_CONN_STATUS BIT(0)
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#define DBC_PORTSC_PORT_ENABLED BIT(1)
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#define DBC_PORTSC_CONN_CHANGE BIT(17)
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#define DBC_PORTSC_RESET_CHANGE BIT(21)
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#define DBC_PORTSC_LINK_CHANGE BIT(22)
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#define DBC_PORTSC_CONFIG_CHANGE BIT(23)
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struct dbc_str_descs {
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char string0[DBC_MAX_STRING_LENGTH];
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char manufacturer[DBC_MAX_STRING_LENGTH];
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char product[DBC_MAX_STRING_LENGTH];
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char serial[DBC_MAX_STRING_LENGTH];
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};
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#define DBC_PROTOCOL 1 /* GNU Remote Debug Command */
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#define DBC_VENDOR_ID 0x1d6b /* Linux Foundation 0x1d6b */
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#define DBC_PRODUCT_ID 0x0010 /* device 0010 */
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#define DBC_DEVICE_REV 0x0010 /* 0.10 */
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enum dbc_state {
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DS_DISABLED = 0,
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DS_INITIALIZED,
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DS_ENABLED,
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DS_CONNECTED,
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DS_CONFIGURED,
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DS_STALLED,
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};
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struct dbc_ep {
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struct xhci_dbc *dbc;
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struct list_head list_pending;
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struct xhci_ring *ring;
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unsigned int direction:1;
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};
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#define DBC_QUEUE_SIZE 16
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#define DBC_WRITE_BUF_SIZE 8192
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/*
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* Private structure for DbC hardware state:
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*/
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struct dbc_port {
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struct tty_port port;
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spinlock_t port_lock; /* port access */
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struct list_head read_pool;
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struct list_head read_queue;
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unsigned int n_read;
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struct tasklet_struct push;
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struct list_head write_pool;
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struct kfifo write_fifo;
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bool registered;
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};
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struct dbc_driver {
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int (*configure)(struct xhci_dbc *dbc);
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void (*disconnect)(struct xhci_dbc *dbc);
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};
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struct xhci_dbc {
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spinlock_t lock; /* device access */
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struct device *dev;
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struct xhci_hcd *xhci;
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struct dbc_regs __iomem *regs;
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struct xhci_ring *ring_evt;
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struct xhci_ring *ring_in;
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struct xhci_ring *ring_out;
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struct xhci_erst erst;
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struct xhci_container_ctx *ctx;
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struct dbc_str_descs *string;
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dma_addr_t string_dma;
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size_t string_size;
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enum dbc_state state;
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struct delayed_work event_work;
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unsigned resume_required:1;
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struct dbc_ep eps[2];
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const struct dbc_driver *driver;
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void *priv;
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};
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struct dbc_request {
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void *buf;
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unsigned int length;
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dma_addr_t dma;
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void (*complete)(struct xhci_dbc *dbc,
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struct dbc_request *req);
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struct list_head list_pool;
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int status;
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unsigned int actual;
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struct xhci_dbc *dbc;
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struct list_head list_pending;
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dma_addr_t trb_dma;
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union xhci_trb *trb;
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unsigned direction:1;
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};
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#define dbc_bulkout_ctx(d) \
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((struct xhci_ep_ctx *)((d)->ctx->bytes + DBC_CONTEXT_SIZE))
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#define dbc_bulkin_ctx(d) \
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((struct xhci_ep_ctx *)((d)->ctx->bytes + DBC_CONTEXT_SIZE * 2))
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#define dbc_bulkout_enq(d) \
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xhci_trb_virt_to_dma((d)->ring_out->enq_seg, (d)->ring_out->enqueue)
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#define dbc_bulkin_enq(d) \
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xhci_trb_virt_to_dma((d)->ring_in->enq_seg, (d)->ring_in->enqueue)
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#define dbc_epctx_info2(t, p, b) \
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cpu_to_le32(EP_TYPE(t) | MAX_PACKET(p) | MAX_BURST(b))
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#define dbc_ep_dma_direction(d) \
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((d)->direction ? DMA_FROM_DEVICE : DMA_TO_DEVICE)
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#define BULK_OUT 0
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#define BULK_IN 1
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#define EPID_OUT 2
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#define EPID_IN 3
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enum evtreturn {
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EVT_ERR = -1,
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EVT_DONE,
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EVT_GSER,
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EVT_DISC,
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};
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static inline struct dbc_ep *get_in_ep(struct xhci_dbc *dbc)
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{
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return &dbc->eps[BULK_IN];
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}
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static inline struct dbc_ep *get_out_ep(struct xhci_dbc *dbc)
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{
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return &dbc->eps[BULK_OUT];
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}
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#ifdef CONFIG_USB_XHCI_DBGCAP
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int xhci_dbc_init(struct xhci_hcd *xhci);
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void xhci_dbc_exit(struct xhci_hcd *xhci);
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int xhci_dbc_tty_probe(struct xhci_hcd *xhci);
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void xhci_dbc_tty_remove(struct xhci_dbc *dbc);
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struct dbc_request *dbc_alloc_request(struct xhci_dbc *dbc,
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unsigned int direction,
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gfp_t flags);
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void dbc_free_request(struct dbc_request *req);
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int dbc_ep_queue(struct dbc_request *req);
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#ifdef CONFIG_PM
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int xhci_dbc_suspend(struct xhci_hcd *xhci);
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int xhci_dbc_resume(struct xhci_hcd *xhci);
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#endif /* CONFIG_PM */
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#else
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static inline int xhci_dbc_init(struct xhci_hcd *xhci)
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{
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return 0;
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}
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static inline void xhci_dbc_exit(struct xhci_hcd *xhci)
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{
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}
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static inline int xhci_dbc_suspend(struct xhci_hcd *xhci)
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{
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return 0;
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}
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static inline int xhci_dbc_resume(struct xhci_hcd *xhci)
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{
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return 0;
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}
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#endif /* CONFIG_USB_XHCI_DBGCAP */
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#endif /* __LINUX_XHCI_DBGCAP_H */
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