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path: root/drivers/usb/gadget/udc/aspeed-vhub/vhub.h
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Diffstat (limited to 'drivers/usb/gadget/udc/aspeed-vhub/vhub.h')
-rw-r--r--drivers/usb/gadget/udc/aspeed-vhub/vhub.h514
1 files changed, 514 insertions, 0 deletions
diff --git a/drivers/usb/gadget/udc/aspeed-vhub/vhub.h b/drivers/usb/gadget/udc/aspeed-vhub/vhub.h
new file mode 100644
index 000000000000..2b040257bc1f
--- /dev/null
+++ b/drivers/usb/gadget/udc/aspeed-vhub/vhub.h
@@ -0,0 +1,514 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+#ifndef __ASPEED_VHUB_H
+#define __ASPEED_VHUB_H
+
+/*****************************
+ * *
+ * VHUB register definitions *
+ * *
+ *****************************/
+
+#define AST_VHUB_CTRL 0x00 /* Root Function Control & Status Register */
+#define AST_VHUB_CONF 0x04 /* Root Configuration Setting Register */
+#define AST_VHUB_IER 0x08 /* Interrupt Ctrl Register */
+#define AST_VHUB_ISR 0x0C /* Interrupt Status Register */
+#define AST_VHUB_EP_ACK_IER 0x10 /* Programmable Endpoint Pool ACK Interrupt Enable Register */
+#define AST_VHUB_EP_NACK_IER 0x14 /* Programmable Endpoint Pool NACK Interrupt Enable Register */
+#define AST_VHUB_EP_ACK_ISR 0x18 /* Programmable Endpoint Pool ACK Interrupt Status Register */
+#define AST_VHUB_EP_NACK_ISR 0x1C /* Programmable Endpoint Pool NACK Interrupt Status Register */
+#define AST_VHUB_SW_RESET 0x20 /* Device Controller Soft Reset Enable Register */
+#define AST_VHUB_USBSTS 0x24 /* USB Status Register */
+#define AST_VHUB_EP_TOGGLE 0x28 /* Programmable Endpoint Pool Data Toggle Value Set */
+#define AST_VHUB_ISO_FAIL_ACC 0x2C /* Isochronous Transaction Fail Accumulator */
+#define AST_VHUB_EP0_CTRL 0x30 /* Endpoint 0 Contrl/Status Register */
+#define AST_VHUB_EP0_DATA 0x34 /* Base Address of Endpoint 0 In/OUT Data Buffer Register */
+#define AST_VHUB_EP1_CTRL 0x38 /* Endpoint 1 Contrl/Status Register */
+#define AST_VHUB_EP1_STS_CHG 0x3C /* Endpoint 1 Status Change Bitmap Data */
+#define AST_VHUB_SETUP0 0x80 /* Root Device Setup Data Buffer0 */
+#define AST_VHUB_SETUP1 0x84 /* Root Device Setup Data Buffer1 */
+
+/* Main control reg */
+#define VHUB_CTRL_PHY_CLK (1 << 31)
+#define VHUB_CTRL_PHY_LOOP_TEST (1 << 25)
+#define VHUB_CTRL_DN_PWN (1 << 24)
+#define VHUB_CTRL_DP_PWN (1 << 23)
+#define VHUB_CTRL_LONG_DESC (1 << 18)
+#define VHUB_CTRL_ISO_RSP_CTRL (1 << 17)
+#define VHUB_CTRL_SPLIT_IN (1 << 16)
+#define VHUB_CTRL_LOOP_T_RESULT (1 << 15)
+#define VHUB_CTRL_LOOP_T_STS (1 << 14)
+#define VHUB_CTRL_PHY_BIST_RESULT (1 << 13)
+#define VHUB_CTRL_PHY_BIST_CTRL (1 << 12)
+#define VHUB_CTRL_PHY_RESET_DIS (1 << 11)
+#define VHUB_CTRL_SET_TEST_MODE(x) ((x) << 8)
+#define VHUB_CTRL_MANUAL_REMOTE_WAKEUP (1 << 4)
+#define VHUB_CTRL_AUTO_REMOTE_WAKEUP (1 << 3)
+#define VHUB_CTRL_CLK_STOP_SUSPEND (1 << 2)
+#define VHUB_CTRL_FULL_SPEED_ONLY (1 << 1)
+#define VHUB_CTRL_UPSTREAM_CONNECT (1 << 0)
+
+/* IER & ISR */
+#define VHUB_IRQ_USB_CMD_DEADLOCK (1 << 18)
+#define VHUB_IRQ_EP_POOL_NAK (1 << 17)
+#define VHUB_IRQ_EP_POOL_ACK_STALL (1 << 16)
+#define VHUB_IRQ_DEVICE5 (1 << 13)
+#define VHUB_IRQ_DEVICE4 (1 << 12)
+#define VHUB_IRQ_DEVICE3 (1 << 11)
+#define VHUB_IRQ_DEVICE2 (1 << 10)
+#define VHUB_IRQ_DEVICE1 (1 << 9)
+#define VHUB_IRQ_BUS_RESUME (1 << 8)
+#define VHUB_IRQ_BUS_SUSPEND (1 << 7)
+#define VHUB_IRQ_BUS_RESET (1 << 6)
+#define VHUB_IRQ_HUB_EP1_IN_DATA_ACK (1 << 5)
+#define VHUB_IRQ_HUB_EP0_IN_DATA_NAK (1 << 4)
+#define VHUB_IRQ_HUB_EP0_IN_ACK_STALL (1 << 3)
+#define VHUB_IRQ_HUB_EP0_OUT_NAK (1 << 2)
+#define VHUB_IRQ_HUB_EP0_OUT_ACK_STALL (1 << 1)
+#define VHUB_IRQ_HUB_EP0_SETUP (1 << 0)
+#define VHUB_IRQ_ACK_ALL 0x1ff
+
+/* SW reset reg */
+#define VHUB_SW_RESET_EP_POOL (1 << 9)
+#define VHUB_SW_RESET_DMA_CONTROLLER (1 << 8)
+#define VHUB_SW_RESET_DEVICE5 (1 << 5)
+#define VHUB_SW_RESET_DEVICE4 (1 << 4)
+#define VHUB_SW_RESET_DEVICE3 (1 << 3)
+#define VHUB_SW_RESET_DEVICE2 (1 << 2)
+#define VHUB_SW_RESET_DEVICE1 (1 << 1)
+#define VHUB_SW_RESET_ROOT_HUB (1 << 0)
+#define VHUB_SW_RESET_ALL (VHUB_SW_RESET_EP_POOL | \
+ VHUB_SW_RESET_DMA_CONTROLLER | \
+ VHUB_SW_RESET_DEVICE5 | \
+ VHUB_SW_RESET_DEVICE4 | \
+ VHUB_SW_RESET_DEVICE3 | \
+ VHUB_SW_RESET_DEVICE2 | \
+ VHUB_SW_RESET_DEVICE1 | \
+ VHUB_SW_RESET_ROOT_HUB)
+/* EP ACK/NACK IRQ masks */
+#define VHUB_EP_IRQ(n) (1 << (n))
+#define VHUB_EP_IRQ_ALL 0x7fff /* 15 EPs */
+
+/* USB status reg */
+#define VHUB_USBSTS_HISPEED (1 << 27)
+
+/* EP toggle */
+#define VHUB_EP_TOGGLE_VALUE (1 << 8)
+#define VHUB_EP_TOGGLE_SET_EPNUM(x) ((x) & 0x1f)
+
+/* HUB EP0 control */
+#define VHUB_EP0_CTRL_STALL (1 << 0)
+#define VHUB_EP0_TX_BUFF_RDY (1 << 1)
+#define VHUB_EP0_RX_BUFF_RDY (1 << 2)
+#define VHUB_EP0_RX_LEN(x) (((x) >> 16) & 0x7f)
+#define VHUB_EP0_SET_TX_LEN(x) (((x) & 0x7f) << 8)
+
+/* HUB EP1 control */
+#define VHUB_EP1_CTRL_RESET_TOGGLE (1 << 2)
+#define VHUB_EP1_CTRL_STALL (1 << 1)
+#define VHUB_EP1_CTRL_ENABLE (1 << 0)
+
+/***********************************
+ * *
+ * per-device register definitions *
+ * *
+ ***********************************/
+#define AST_VHUB_DEV_EN_CTRL 0x00
+#define AST_VHUB_DEV_ISR 0x04
+#define AST_VHUB_DEV_EP0_CTRL 0x08
+#define AST_VHUB_DEV_EP0_DATA 0x0c
+
+/* Device enable control */
+#define VHUB_DEV_EN_SET_ADDR(x) ((x) << 8)
+#define VHUB_DEV_EN_ADDR_MASK ((0xff) << 8)
+#define VHUB_DEV_EN_EP0_NAK_IRQEN (1 << 6)
+#define VHUB_DEV_EN_EP0_IN_ACK_IRQEN (1 << 5)
+#define VHUB_DEV_EN_EP0_OUT_NAK_IRQEN (1 << 4)
+#define VHUB_DEV_EN_EP0_OUT_ACK_IRQEN (1 << 3)
+#define VHUB_DEV_EN_EP0_SETUP_IRQEN (1 << 2)
+#define VHUB_DEV_EN_SPEED_SEL_HIGH (1 << 1)
+#define VHUB_DEV_EN_ENABLE_PORT (1 << 0)
+
+/* Interrupt status */
+#define VHUV_DEV_IRQ_EP0_IN_DATA_NACK (1 << 4)
+#define VHUV_DEV_IRQ_EP0_IN_ACK_STALL (1 << 3)
+#define VHUV_DEV_IRQ_EP0_OUT_DATA_NACK (1 << 2)
+#define VHUV_DEV_IRQ_EP0_OUT_ACK_STALL (1 << 1)
+#define VHUV_DEV_IRQ_EP0_SETUP (1 << 0)
+
+/* Control bits.
+ *
+ * Note: The driver relies on the bulk of those bits
+ * matching corresponding vHub EP0 control bits
+ */
+#define VHUB_DEV_EP0_CTRL_STALL VHUB_EP0_CTRL_STALL
+#define VHUB_DEV_EP0_TX_BUFF_RDY VHUB_EP0_TX_BUFF_RDY
+#define VHUB_DEV_EP0_RX_BUFF_RDY VHUB_EP0_RX_BUFF_RDY
+#define VHUB_DEV_EP0_RX_LEN(x) VHUB_EP0_RX_LEN(x)
+#define VHUB_DEV_EP0_SET_TX_LEN(x) VHUB_EP0_SET_TX_LEN(x)
+
+/*************************************
+ * *
+ * per-endpoint register definitions *
+ * *
+ *************************************/
+
+#define AST_VHUB_EP_CONFIG 0x00
+#define AST_VHUB_EP_DMA_CTLSTAT 0x04
+#define AST_VHUB_EP_DESC_BASE 0x08
+#define AST_VHUB_EP_DESC_STATUS 0x0C
+
+/* EP config reg */
+#define VHUB_EP_CFG_SET_MAX_PKT(x) (((x) & 0x3ff) << 16)
+#define VHUB_EP_CFG_AUTO_DATA_DISABLE (1 << 13)
+#define VHUB_EP_CFG_STALL_CTRL (1 << 12)
+#define VHUB_EP_CFG_SET_EP_NUM(x) (((x) & 0xf) << 8)
+#define VHUB_EP_CFG_SET_TYPE(x) ((x) << 5)
+#define EP_TYPE_OFF 0
+#define EP_TYPE_BULK 1
+#define EP_TYPE_INT 2
+#define EP_TYPE_ISO 3
+#define VHUB_EP_CFG_DIR_OUT (1 << 4)
+#define VHUB_EP_CFG_SET_DEV(x) ((x) << 1)
+#define VHUB_EP_CFG_ENABLE (1 << 0)
+
+/* EP DMA control */
+#define VHUB_EP_DMA_PROC_STATUS(x) (((x) >> 4) & 0xf)
+#define EP_DMA_PROC_RX_IDLE 0
+#define EP_DMA_PROC_TX_IDLE 8
+#define VHUB_EP_DMA_IN_LONG_MODE (1 << 3)
+#define VHUB_EP_DMA_OUT_CONTIG_MODE (1 << 3)
+#define VHUB_EP_DMA_CTRL_RESET (1 << 2)
+#define VHUB_EP_DMA_SINGLE_STAGE (1 << 1)
+#define VHUB_EP_DMA_DESC_MODE (1 << 0)
+
+/* EP DMA status */
+#define VHUB_EP_DMA_SET_TX_SIZE(x) ((x) << 16)
+#define VHUB_EP_DMA_TX_SIZE(x) (((x) >> 16) & 0x7ff)
+#define VHUB_EP_DMA_RPTR(x) (((x) >> 8) & 0xff)
+#define VHUB_EP_DMA_SET_RPTR(x) (((x) & 0xff) << 8)
+#define VHUB_EP_DMA_SET_CPU_WPTR(x) (x)
+#define VHUB_EP_DMA_SINGLE_KICK (1 << 0) /* WPTR = 1 for single mode */
+
+/*******************************
+ * *
+ * DMA descriptors definitions *
+ * *
+ *******************************/
+
+/* Desc W1 IN */
+#define VHUB_DSC1_IN_INTERRUPT (1 << 31)
+#define VHUB_DSC1_IN_SPID_DATA0 (0 << 14)
+#define VHUB_DSC1_IN_SPID_DATA2 (1 << 14)
+#define VHUB_DSC1_IN_SPID_DATA1 (2 << 14)
+#define VHUB_DSC1_IN_SPID_MDATA (3 << 14)
+#define VHUB_DSC1_IN_SET_LEN(x) ((x) & 0xfff)
+#define VHUB_DSC1_IN_LEN(x) ((x) & 0xfff)
+
+/****************************************
+ * *
+ * Data structures and misc definitions *
+ * *
+ ****************************************/
+
+#define AST_VHUB_NUM_GEN_EPs 15 /* Generic non-0 EPs */
+#define AST_VHUB_NUM_PORTS 5 /* vHub ports */
+#define AST_VHUB_EP0_MAX_PACKET 64 /* EP0's max packet size */
+#define AST_VHUB_EPn_MAX_PACKET 1024 /* Generic EPs max packet size */
+#define AST_VHUB_DESCS_COUNT 256 /* Use 256 descriptor mode (valid
+ * values are 256 and 32)
+ */
+
+struct ast_vhub;
+struct ast_vhub_dev;
+
+/*
+ * DMA descriptor (generic EPs only, currently only used
+ * for IN endpoints
+ */
+struct ast_vhub_desc {
+ __le32 w0;
+ __le32 w1;
+};
+
+/* A transfer request, either core-originated or internal */
+struct ast_vhub_req {
+ struct usb_request req;
+ struct list_head queue;
+
+ /* Actual count written to descriptors (desc mode only) */
+ unsigned int act_count;
+
+ /*
+ * Desc number of the final packet or -1. For non-desc
+ * mode (or ep0), any >= 0 value means "last packet"
+ */
+ int last_desc;
+
+ /* Request active (pending DMAs) */
+ bool active : 1;
+
+ /* Internal request (don't call back core) */
+ bool internal : 1;
+};
+#define to_ast_req(__ureq) container_of(__ureq, struct ast_vhub_req, req)
+
+/* Current state of an EP0 */
+enum ep0_state {
+ ep0_state_token,
+ ep0_state_data,
+ ep0_state_status,
+};
+
+/*
+ * An endpoint, either generic, ep0, actual gadget EP
+ * or internal use vhub EP0. vhub EP1 doesn't have an
+ * associated structure as it's mostly HW managed.
+ */
+struct ast_vhub_ep {
+ struct usb_ep ep;
+
+ /* Request queue */
+ struct list_head queue;
+
+ /* EP index in the device, 0 means this is an EP0 */
+ unsigned int d_idx;
+
+ /* Dev pointer or NULL for vHub EP0 */
+ struct ast_vhub_dev *dev;
+
+ /* vHub itself */
+ struct ast_vhub *vhub;
+
+ /*
+ * DMA buffer for EP0, fallback DMA buffer for misaligned
+ * OUT transfers for generic EPs
+ */
+ void *buf;
+ dma_addr_t buf_dma;
+
+ /* The rest depends on the EP type */
+ union {
+ /* EP0 (either device or vhub) */
+ struct {
+ /*
+ * EP0 registers are "similar" for
+ * vHub and devices but located in
+ * different places.
+ */
+ void __iomem *ctlstat;
+ void __iomem *setup;
+
+ /* Current state & direction */
+ enum ep0_state state;
+ bool dir_in;
+
+ /* Internal use request */
+ struct ast_vhub_req req;
+ } ep0;
+
+ /* Generic endpoint (aka EPn) */
+ struct {
+ /* Registers */
+ void __iomem *regs;
+
+ /* Index in global pool (0..14) */
+ unsigned int g_idx;
+
+ /* DMA Descriptors */
+ struct ast_vhub_desc *descs;
+ dma_addr_t descs_dma;
+ unsigned int d_next;
+ unsigned int d_last;
+ unsigned int dma_conf;
+
+ /* Max chunk size for IN EPs */
+ unsigned int chunk_max;
+
+ /* State flags */
+ bool is_in : 1;
+ bool is_iso : 1;
+ bool stalled : 1;
+ bool wedged : 1;
+ bool enabled : 1;
+ bool desc_mode : 1;
+ } epn;
+ };
+};
+#define to_ast_ep(__uep) container_of(__uep, struct ast_vhub_ep, ep)
+
+/* A device attached to a vHub port */
+struct ast_vhub_dev {
+ struct ast_vhub *vhub;
+ void __iomem *regs;
+
+ /* Device index (0...4) and name string */
+ unsigned int index;
+ const char *name;
+
+ /* sysfs enclosure for the gadget gunk */
+ struct device *port_dev;
+
+ /* Link to gadget core */
+ struct usb_gadget gadget;
+ struct usb_gadget_driver *driver;
+ bool registered : 1;
+ bool wakeup_en : 1;
+ bool suspended : 1;
+ bool enabled : 1;
+
+ /* Endpoint structures */
+ struct ast_vhub_ep ep0;
+ struct ast_vhub_ep *epns[AST_VHUB_NUM_GEN_EPs];
+
+};
+#define to_ast_dev(__g) container_of(__g, struct ast_vhub_dev, gadget)
+
+/* Per vhub port stateinfo structure */
+struct ast_vhub_port {
+ /* Port status & status change registers */
+ u16 status;
+ u16 change;
+
+ /* Associated device slot */
+ struct ast_vhub_dev dev;
+};
+
+/* Global vhub structure */
+struct ast_vhub {
+ struct platform_device *pdev;
+ void __iomem *regs;
+ int irq;
+ spinlock_t lock;
+ struct work_struct wake_work;
+ struct clk *clk;
+
+ /* EP0 DMA buffers allocated in one chunk */
+ void *ep0_bufs;
+ dma_addr_t ep0_bufs_dma;
+
+ /* EP0 of the vhub itself */
+ struct ast_vhub_ep ep0;
+
+ /* State of vhub ep1 */
+ bool ep1_stalled : 1;
+
+ /* Per-port info */
+ struct ast_vhub_port ports[AST_VHUB_NUM_PORTS];
+
+ /* Generic EP data structures */
+ struct ast_vhub_ep epns[AST_VHUB_NUM_GEN_EPs];
+
+ /* Upstream bus is suspended ? */
+ bool suspended : 1;
+
+ /* Hub itself can signal remote wakeup */
+ bool wakeup_en : 1;
+
+ /* Force full speed only */
+ bool force_usb1 : 1;
+
+ /* Upstream bus speed captured at bus reset */
+ unsigned int speed;
+};
+
+/* Standard request handlers result codes */
+enum std_req_rc {
+ std_req_stall = -1, /* Stall requested */
+ std_req_complete = 0, /* Request completed with no data */
+ std_req_data = 1, /* Request completed with data */
+ std_req_driver = 2, /* Pass to driver pls */
+};
+
+#ifdef CONFIG_USB_GADGET_VERBOSE
+#define UDCVDBG(u, fmt...) dev_dbg(&(u)->pdev->dev, fmt)
+
+#define EPVDBG(ep, fmt, ...) do { \
+ dev_dbg(&(ep)->vhub->pdev->dev, \
+ "%s:EP%d " fmt, \
+ (ep)->dev ? (ep)->dev->name : "hub", \
+ (ep)->d_idx, ##__VA_ARGS__); \
+ } while(0)
+
+#define DVDBG(d, fmt, ...) do { \
+ dev_dbg(&(d)->vhub->pdev->dev, \
+ "%s " fmt, (d)->name, \
+ ##__VA_ARGS__); \
+ } while(0)
+
+#else
+#define UDCVDBG(u, fmt...) do { } while(0)
+#define EPVDBG(ep, fmt, ...) do { } while(0)
+#define DVDBG(d, fmt, ...) do { } while(0)
+#endif
+
+#ifdef CONFIG_USB_GADGET_DEBUG
+#define UDCDBG(u, fmt...) dev_dbg(&(u)->pdev->dev, fmt)
+
+#define EPDBG(ep, fmt, ...) do { \
+ dev_dbg(&(ep)->vhub->pdev->dev, \
+ "%s:EP%d " fmt, \
+ (ep)->dev ? (ep)->dev->name : "hub", \
+ (ep)->d_idx, ##__VA_ARGS__); \
+ } while(0)
+
+#define DDBG(d, fmt, ...) do { \
+ dev_dbg(&(d)->vhub->pdev->dev, \
+ "%s " fmt, (d)->name, \
+ ##__VA_ARGS__); \
+ } while(0)
+#else
+#define UDCDBG(u, fmt...) do { } while(0)
+#define EPDBG(ep, fmt, ...) do { } while(0)
+#define DDBG(d, fmt, ...) do { } while(0)
+#endif
+
+/* core.c */
+void ast_vhub_done(struct ast_vhub_ep *ep, struct ast_vhub_req *req,
+ int status);
+void ast_vhub_nuke(struct ast_vhub_ep *ep, int status);
+struct usb_request *ast_vhub_alloc_request(struct usb_ep *u_ep,
+ gfp_t gfp_flags);
+void ast_vhub_free_request(struct usb_ep *u_ep, struct usb_request *u_req);
+void ast_vhub_init_hw(struct ast_vhub *vhub);
+
+/* ep0.c */
+void ast_vhub_ep0_handle_ack(struct ast_vhub_ep *ep, bool in_ack);
+void ast_vhub_ep0_handle_setup(struct ast_vhub_ep *ep);
+void ast_vhub_init_ep0(struct ast_vhub *vhub, struct ast_vhub_ep *ep,
+ struct ast_vhub_dev *dev);
+int ast_vhub_reply(struct ast_vhub_ep *ep, char *ptr, int len);
+int __ast_vhub_simple_reply(struct ast_vhub_ep *ep, int len, ...);
+#define ast_vhub_simple_reply(udc, ...) \
+ __ast_vhub_simple_reply((udc), \
+ sizeof((u8[]) { __VA_ARGS__ })/sizeof(u8), \
+ __VA_ARGS__)
+
+/* hub.c */
+void ast_vhub_init_hub(struct ast_vhub *vhub);
+enum std_req_rc ast_vhub_std_hub_request(struct ast_vhub_ep *ep,
+ struct usb_ctrlrequest *crq);
+enum std_req_rc ast_vhub_class_hub_request(struct ast_vhub_ep *ep,
+ struct usb_ctrlrequest *crq);
+void ast_vhub_device_connect(struct ast_vhub *vhub, unsigned int port,
+ bool on);
+void ast_vhub_hub_suspend(struct ast_vhub *vhub);
+void ast_vhub_hub_resume(struct ast_vhub *vhub);
+void ast_vhub_hub_reset(struct ast_vhub *vhub);
+void ast_vhub_hub_wake_all(struct ast_vhub *vhub);
+
+/* dev.c */
+int ast_vhub_init_dev(struct ast_vhub *vhub, unsigned int idx);
+void ast_vhub_del_dev(struct ast_vhub_dev *d);
+void ast_vhub_dev_irq(struct ast_vhub_dev *d);
+int ast_vhub_std_dev_request(struct ast_vhub_ep *ep,
+ struct usb_ctrlrequest *crq);
+
+/* epn.c */
+void ast_vhub_epn_ack_irq(struct ast_vhub_ep *ep);
+void ast_vhub_update_epn_stall(struct ast_vhub_ep *ep);
+struct ast_vhub_ep *ast_vhub_alloc_epn(struct ast_vhub_dev *d, u8 addr);
+void ast_vhub_dev_suspend(struct ast_vhub_dev *d);
+void ast_vhub_dev_resume(struct ast_vhub_dev *d);
+void ast_vhub_dev_reset(struct ast_vhub_dev *d);
+
+#endif /* __ASPEED_VHUB_H */
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.