Adding upstream version 6.6.15.upstream/6.6.15

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 248 insertions, 0 deletions

diff --git a/drivers/usb/host/xhci-dbgcap.h b/drivers/usb/host/xhci-dbgcap.h
new file mode 100644
index 0000000000..51a7ab3ba0
--- /dev/null
+++ b/drivers/usb/host/xhci-dbgcap.h
@@ -0,0 +1,248 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/**
+ * 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_ep {
+	struct xhci_dbc			*dbc;
+	struct list_head		list_pending;
+	struct xhci_ring		*ring;
+	unsigned int			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 */
+	int				minor;
+
+	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_driver {
+	int (*configure)(struct xhci_dbc *dbc);
+	void (*disconnect)(struct xhci_dbc *dbc);
+};
+
+struct xhci_dbc {
+	spinlock_t			lock;		/* device access */
+	struct device			*dev;
+	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;
+	u16				idVendor;
+	u16				idProduct;
+	u16				bcdDevice;
+	u8				bInterfaceProtocol;
+
+	enum dbc_state			state;
+	struct delayed_work		event_work;
+	unsigned			resume_required:1;
+	struct dbc_ep			eps[2];
+
+	const struct dbc_driver		*driver;
+	void				*priv;
+};
+
+struct dbc_request {
+	void				*buf;
+	unsigned int			length;
+	dma_addr_t			dma;
+	void				(*complete)(struct xhci_dbc *dbc,
+						    struct dbc_request *req);
+	struct list_head		list_pool;
+	int				status;
+	unsigned int			actual;
+
+	struct xhci_dbc			*dbc;
+	struct list_head		list_pending;
+	dma_addr_t			trb_dma;
+	union xhci_trb			*trb;
+	unsigned			direction:1;
+};
+
+#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_dbc *dbc)
+{
+	return &dbc->eps[BULK_IN];
+}
+
+static inline struct dbc_ep *get_out_ep(struct xhci_dbc *dbc)
+{
+	return &dbc->eps[BULK_OUT];
+}
+
+#ifdef CONFIG_USB_XHCI_DBGCAP
+int xhci_create_dbc_dev(struct xhci_hcd *xhci);
+void xhci_remove_dbc_dev(struct xhci_hcd *xhci);
+int xhci_dbc_init(void);
+void xhci_dbc_exit(void);
+int dbc_tty_init(void);
+void dbc_tty_exit(void);
+int xhci_dbc_tty_probe(struct device *dev, void __iomem *res, struct xhci_hcd *xhci);
+void xhci_dbc_tty_remove(struct xhci_dbc *dbc);
+struct xhci_dbc *xhci_alloc_dbc(struct device *dev, void __iomem *res,
+				 const struct dbc_driver *driver);
+void xhci_dbc_remove(struct xhci_dbc *dbc);
+struct dbc_request *dbc_alloc_request(struct xhci_dbc *dbc,
+				      unsigned int direction,
+				      gfp_t flags);
+void dbc_free_request(struct dbc_request *req);
+int dbc_ep_queue(struct dbc_request *req);
+#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_create_dbc_dev(struct xhci_hcd *xhci)
+{
+	return 0;
+}
+
+static inline void xhci_remove_dbc_dev(struct xhci_hcd *xhci)
+{
+}
+static inline int xhci_dbc_init(void)
+{
+	return 0;
+}
+static inline void xhci_dbc_exit(void)
+{
+}
+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 */