626 lines
16 KiB
C
626 lines
16 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* MUSB OTG driver defines
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*
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* Copyright 2005 Mentor Graphics Corporation
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* Copyright (C) 2005-2006 by Texas Instruments
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* Copyright (C) 2006-2007 Nokia Corporation
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*/
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#ifndef __MUSB_CORE_H__
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#define __MUSB_CORE_H__
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#include <linux/slab.h>
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#include <linux/list.h>
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#include <linux/interrupt.h>
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#include <linux/errno.h>
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#include <linux/timer.h>
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#include <linux/device.h>
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#include <linux/usb/ch9.h>
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#include <linux/usb/gadget.h>
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#include <linux/usb.h>
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#include <linux/usb/otg.h>
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#include <linux/usb/musb.h>
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#include <linux/phy/phy.h>
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#include <linux/workqueue.h>
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struct musb;
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struct musb_hw_ep;
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struct musb_ep;
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struct musb_qh;
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/* Helper defines for struct musb->hwvers */
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#define MUSB_HWVERS_MAJOR(x) ((x >> 10) & 0x1f)
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#define MUSB_HWVERS_MINOR(x) (x & 0x3ff)
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#define MUSB_HWVERS_RC 0x8000
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#define MUSB_HWVERS_1300 0x52C
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#define MUSB_HWVERS_1400 0x590
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#define MUSB_HWVERS_1800 0x720
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#define MUSB_HWVERS_1900 0x784
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#define MUSB_HWVERS_2000 0x800
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#include "musb_debug.h"
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#include "musb_dma.h"
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#include "musb_io.h"
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#include "musb_gadget.h"
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#include <linux/usb/hcd.h>
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#include "musb_host.h"
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/* NOTE: otg and peripheral-only state machines start at B_IDLE.
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* OTG or host-only go to A_IDLE when ID is sensed.
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*/
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#define is_peripheral_active(m) (!(m)->is_host)
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#define is_host_active(m) ((m)->is_host)
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/****************************** CONSTANTS ********************************/
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#ifndef MUSB_C_NUM_EPS
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#define MUSB_C_NUM_EPS ((u8)16)
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#endif
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#ifndef MUSB_MAX_END0_PACKET
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#define MUSB_MAX_END0_PACKET ((u16)MUSB_EP0_FIFOSIZE)
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#endif
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/* host side ep0 states */
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enum musb_h_ep0_state {
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MUSB_EP0_IDLE,
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MUSB_EP0_START, /* expect ack of setup */
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MUSB_EP0_IN, /* expect IN DATA */
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MUSB_EP0_OUT, /* expect ack of OUT DATA */
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MUSB_EP0_STATUS, /* expect ack of STATUS */
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} __attribute__ ((packed));
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/* peripheral side ep0 states */
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enum musb_g_ep0_state {
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MUSB_EP0_STAGE_IDLE, /* idle, waiting for SETUP */
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MUSB_EP0_STAGE_SETUP, /* received SETUP */
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MUSB_EP0_STAGE_TX, /* IN data */
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MUSB_EP0_STAGE_RX, /* OUT data */
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MUSB_EP0_STAGE_STATUSIN, /* (after OUT data) */
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MUSB_EP0_STAGE_STATUSOUT, /* (after IN data) */
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MUSB_EP0_STAGE_ACKWAIT, /* after zlp, before statusin */
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} __attribute__ ((packed));
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/*
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* OTG protocol constants. See USB OTG 1.3 spec,
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* sections 5.5 "Device Timings" and 6.6.5 "Timers".
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*/
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#define OTG_TIME_A_WAIT_VRISE 100 /* msec (max) */
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#define OTG_TIME_A_WAIT_BCON 1100 /* min 1 second */
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#define OTG_TIME_A_AIDL_BDIS 200 /* min 200 msec */
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#define OTG_TIME_B_ASE0_BRST 100 /* min 3.125 ms */
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/****************************** FUNCTIONS ********************************/
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#define MUSB_HST_MODE(_musb)\
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{ (_musb)->is_host = true; }
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#define MUSB_DEV_MODE(_musb) \
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{ (_musb)->is_host = false; }
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#define test_devctl_hst_mode(_x) \
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(musb_readb((_x)->mregs, MUSB_DEVCTL)&MUSB_DEVCTL_HM)
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#define MUSB_MODE(musb) ((musb)->is_host ? "Host" : "Peripheral")
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/******************************** TYPES *************************************/
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struct musb_io;
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/**
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* struct musb_platform_ops - Operations passed to musb_core by HW glue layer
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* @quirks: flags for platform specific quirks
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* @enable: enable device
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* @disable: disable device
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* @ep_offset: returns the end point offset
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* @ep_select: selects the specified end point
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* @fifo_mode: sets the fifo mode
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* @fifo_offset: returns the fifo offset
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* @readb: read 8 bits
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* @writeb: write 8 bits
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* @clearb: could be clear-on-readb or W1C
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* @readw: read 16 bits
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* @writew: write 16 bits
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* @clearw: could be clear-on-readw or W1C
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* @read_fifo: reads the fifo
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* @write_fifo: writes to fifo
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* @get_toggle: platform specific get toggle function
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* @set_toggle: platform specific set toggle function
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* @dma_init: platform specific dma init function
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* @dma_exit: platform specific dma exit function
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* @init: turns on clocks, sets up platform-specific registers, etc
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* @exit: undoes @init
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* @set_mode: forcefully changes operating mode
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* @try_idle: tries to idle the IP
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* @recover: platform-specific babble recovery
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* @vbus_status: returns vbus status if possible
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* @set_vbus: forces vbus status
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* @pre_root_reset_end: called before the root usb port reset flag gets cleared
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* @post_root_reset_end: called after the root usb port reset flag gets cleared
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* @phy_callback: optional callback function for the phy to call
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*/
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struct musb_platform_ops {
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#define MUSB_G_NO_SKB_RESERVE BIT(9)
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#define MUSB_DA8XX BIT(8)
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#define MUSB_PRESERVE_SESSION BIT(7)
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#define MUSB_DMA_UX500 BIT(6)
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#define MUSB_DMA_CPPI41 BIT(5)
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#define MUSB_DMA_CPPI BIT(4)
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#define MUSB_DMA_TUSB_OMAP BIT(3)
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#define MUSB_DMA_INVENTRA BIT(2)
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#define MUSB_IN_TUSB BIT(1)
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#define MUSB_INDEXED_EP BIT(0)
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u32 quirks;
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int (*init)(struct musb *musb);
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int (*exit)(struct musb *musb);
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void (*enable)(struct musb *musb);
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void (*disable)(struct musb *musb);
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u32 (*ep_offset)(u8 epnum, u16 offset);
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void (*ep_select)(void __iomem *mbase, u8 epnum);
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u16 fifo_mode;
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u32 (*fifo_offset)(u8 epnum);
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u32 (*busctl_offset)(u8 epnum, u16 offset);
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u8 (*readb)(void __iomem *addr, u32 offset);
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void (*writeb)(void __iomem *addr, u32 offset, u8 data);
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u8 (*clearb)(void __iomem *addr, u32 offset);
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u16 (*readw)(void __iomem *addr, u32 offset);
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void (*writew)(void __iomem *addr, u32 offset, u16 data);
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u16 (*clearw)(void __iomem *addr, u32 offset);
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void (*read_fifo)(struct musb_hw_ep *hw_ep, u16 len, u8 *buf);
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void (*write_fifo)(struct musb_hw_ep *hw_ep, u16 len, const u8 *buf);
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u16 (*get_toggle)(struct musb_qh *qh, int is_out);
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u16 (*set_toggle)(struct musb_qh *qh, int is_out, struct urb *urb);
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struct dma_controller *
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(*dma_init) (struct musb *musb, void __iomem *base);
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void (*dma_exit)(struct dma_controller *c);
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int (*set_mode)(struct musb *musb, u8 mode);
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void (*try_idle)(struct musb *musb, unsigned long timeout);
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int (*recover)(struct musb *musb);
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int (*vbus_status)(struct musb *musb);
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void (*set_vbus)(struct musb *musb, int on);
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void (*pre_root_reset_end)(struct musb *musb);
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void (*post_root_reset_end)(struct musb *musb);
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int (*phy_callback)(enum musb_vbus_id_status status);
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void (*clear_ep_rxintr)(struct musb *musb, int epnum);
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};
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/*
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* struct musb_hw_ep - endpoint hardware (bidirectional)
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*
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* Ordered slightly for better cacheline locality.
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*/
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struct musb_hw_ep {
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struct musb *musb;
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void __iomem *fifo;
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void __iomem *regs;
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#if IS_ENABLED(CONFIG_USB_MUSB_TUSB6010)
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void __iomem *conf;
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#endif
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/* index in musb->endpoints[] */
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u8 epnum;
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/* hardware configuration, possibly dynamic */
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bool is_shared_fifo;
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bool tx_double_buffered;
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bool rx_double_buffered;
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u16 max_packet_sz_tx;
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u16 max_packet_sz_rx;
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struct dma_channel *tx_channel;
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struct dma_channel *rx_channel;
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#if IS_ENABLED(CONFIG_USB_MUSB_TUSB6010)
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/* TUSB has "asynchronous" and "synchronous" dma modes */
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dma_addr_t fifo_async;
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dma_addr_t fifo_sync;
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void __iomem *fifo_sync_va;
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#endif
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/* currently scheduled peripheral endpoint */
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struct musb_qh *in_qh;
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struct musb_qh *out_qh;
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u8 rx_reinit;
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u8 tx_reinit;
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/* peripheral side */
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struct musb_ep ep_in; /* TX */
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struct musb_ep ep_out; /* RX */
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};
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static inline struct musb_request *next_in_request(struct musb_hw_ep *hw_ep)
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{
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return next_request(&hw_ep->ep_in);
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}
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static inline struct musb_request *next_out_request(struct musb_hw_ep *hw_ep)
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{
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return next_request(&hw_ep->ep_out);
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}
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struct musb_csr_regs {
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/* FIFO registers */
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u16 txmaxp, txcsr, rxmaxp, rxcsr;
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u16 rxfifoadd, txfifoadd;
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u8 txtype, txinterval, rxtype, rxinterval;
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u8 rxfifosz, txfifosz;
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u8 txfunaddr, txhubaddr, txhubport;
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u8 rxfunaddr, rxhubaddr, rxhubport;
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};
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struct musb_context_registers {
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u8 power;
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u8 intrusbe;
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u16 frame;
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u8 index, testmode;
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u8 devctl, busctl, misc;
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u32 otg_interfsel;
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struct musb_csr_regs index_regs[MUSB_C_NUM_EPS];
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};
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/*
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* struct musb - Driver instance data.
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*/
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struct musb {
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/* device lock */
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spinlock_t lock;
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spinlock_t list_lock; /* resume work list lock */
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struct musb_io io;
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const struct musb_platform_ops *ops;
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struct musb_context_registers context;
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irqreturn_t (*isr)(int, void *);
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struct delayed_work irq_work;
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struct delayed_work deassert_reset_work;
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struct delayed_work finish_resume_work;
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struct delayed_work gadget_work;
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u16 hwvers;
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u16 intrrxe;
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u16 intrtxe;
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/* this hub status bit is reserved by USB 2.0 and not seen by usbcore */
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#define MUSB_PORT_STAT_RESUME (1 << 31)
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u32 port1_status;
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unsigned long rh_timer;
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enum musb_h_ep0_state ep0_stage;
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/* bulk traffic normally dedicates endpoint hardware, and each
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* direction has its own ring of host side endpoints.
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* we try to progress the transfer at the head of each endpoint's
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* queue until it completes or NAKs too much; then we try the next
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* endpoint.
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*/
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struct musb_hw_ep *bulk_ep;
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struct list_head control; /* of musb_qh */
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struct list_head in_bulk; /* of musb_qh */
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struct list_head out_bulk; /* of musb_qh */
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struct list_head pending_list; /* pending work list */
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struct timer_list otg_timer;
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struct timer_list dev_timer;
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struct notifier_block nb;
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struct dma_controller *dma_controller;
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struct device *controller;
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void __iomem *ctrl_base;
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void __iomem *mregs;
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#if IS_ENABLED(CONFIG_USB_MUSB_TUSB6010)
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dma_addr_t async;
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dma_addr_t sync;
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void __iomem *sync_va;
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u8 tusb_revision;
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#endif
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/* passed down from chip/board specific irq handlers */
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u8 int_usb;
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u16 int_rx;
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u16 int_tx;
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struct usb_phy *xceiv;
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struct phy *phy;
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enum usb_otg_state otg_state;
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int nIrq;
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unsigned irq_wake:1;
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struct musb_hw_ep endpoints[MUSB_C_NUM_EPS];
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#define control_ep endpoints
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#define VBUSERR_RETRY_COUNT 3
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u16 vbuserr_retry;
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u16 epmask;
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u8 nr_endpoints;
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int (*board_set_power)(int state);
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u8 min_power; /* vbus for periph, in mA/2 */
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enum musb_mode port_mode;
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bool session;
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unsigned long quirk_retries;
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bool is_host;
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int a_wait_bcon; /* VBUS timeout in msecs */
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unsigned long idle_timeout; /* Next timeout in jiffies */
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unsigned is_initialized:1;
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unsigned is_runtime_suspended:1;
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/* active means connected and not suspended */
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unsigned is_active:1;
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unsigned is_multipoint:1;
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unsigned hb_iso_rx:1; /* high bandwidth iso rx? */
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unsigned hb_iso_tx:1; /* high bandwidth iso tx? */
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unsigned dyn_fifo:1; /* dynamic FIFO supported? */
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unsigned bulk_split:1;
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#define can_bulk_split(musb, type) \
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(((type) == USB_ENDPOINT_XFER_BULK) && (musb)->bulk_split)
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unsigned bulk_combine:1;
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#define can_bulk_combine(musb, type) \
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(((type) == USB_ENDPOINT_XFER_BULK) && (musb)->bulk_combine)
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/* is_suspended means USB B_PERIPHERAL suspend */
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unsigned is_suspended:1;
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/* may_wakeup means remote wakeup is enabled */
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unsigned may_wakeup:1;
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/* is_self_powered is reported in device status and the
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* config descriptor. is_bus_powered means B_PERIPHERAL
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* draws some VBUS current; both can be true.
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*/
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unsigned is_self_powered:1;
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unsigned is_bus_powered:1;
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unsigned set_address:1;
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unsigned test_mode:1;
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unsigned softconnect:1;
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unsigned flush_irq_work:1;
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u8 address;
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u8 test_mode_nr;
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u16 ackpend; /* ep0 */
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enum musb_g_ep0_state ep0_state;
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struct usb_gadget g; /* the gadget */
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struct usb_gadget_driver *gadget_driver; /* its driver */
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struct usb_hcd *hcd; /* the usb hcd */
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const struct musb_hdrc_config *config;
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int xceiv_old_state;
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#ifdef CONFIG_DEBUG_FS
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struct dentry *debugfs_root;
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#endif
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};
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/* This must be included after struct musb is defined */
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#include "musb_regs.h"
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static inline struct musb *gadget_to_musb(struct usb_gadget *g)
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{
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return container_of(g, struct musb, g);
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}
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static inline char *musb_ep_xfertype_string(u8 type)
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{
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char *s;
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switch (type) {
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case USB_ENDPOINT_XFER_CONTROL:
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s = "ctrl";
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break;
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case USB_ENDPOINT_XFER_ISOC:
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s = "iso";
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break;
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case USB_ENDPOINT_XFER_BULK:
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s = "bulk";
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break;
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case USB_ENDPOINT_XFER_INT:
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s = "int";
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break;
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default:
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s = "";
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break;
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}
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return s;
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}
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static inline int musb_read_fifosize(struct musb *musb,
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struct musb_hw_ep *hw_ep, u8 epnum)
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{
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void __iomem *mbase = musb->mregs;
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u8 reg = 0;
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/* read from core using indexed model */
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reg = musb_readb(mbase, musb->io.ep_offset(epnum, MUSB_FIFOSIZE));
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/* 0's returned when no more endpoints */
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if (!reg)
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return -ENODEV;
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musb->nr_endpoints++;
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musb->epmask |= (1 << epnum);
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hw_ep->max_packet_sz_tx = 1 << (reg & 0x0f);
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/* shared TX/RX FIFO? */
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if ((reg & 0xf0) == 0xf0) {
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hw_ep->max_packet_sz_rx = hw_ep->max_packet_sz_tx;
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hw_ep->is_shared_fifo = true;
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return 0;
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} else {
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hw_ep->max_packet_sz_rx = 1 << ((reg & 0xf0) >> 4);
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hw_ep->is_shared_fifo = false;
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}
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return 0;
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}
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static inline void musb_configure_ep0(struct musb *musb)
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{
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musb->endpoints[0].max_packet_sz_tx = MUSB_EP0_FIFOSIZE;
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musb->endpoints[0].max_packet_sz_rx = MUSB_EP0_FIFOSIZE;
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musb->endpoints[0].is_shared_fifo = true;
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}
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/***************************** Glue it together *****************************/
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extern const char musb_driver_name[];
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extern void musb_stop(struct musb *musb);
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extern void musb_start(struct musb *musb);
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extern void musb_write_fifo(struct musb_hw_ep *ep, u16 len, const u8 *src);
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extern void musb_read_fifo(struct musb_hw_ep *ep, u16 len, u8 *dst);
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extern int musb_set_host(struct musb *musb);
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extern int musb_set_peripheral(struct musb *musb);
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extern void musb_load_testpacket(struct musb *);
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extern irqreturn_t musb_interrupt(struct musb *);
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extern void musb_hnp_stop(struct musb *musb);
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int musb_queue_resume_work(struct musb *musb,
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int (*callback)(struct musb *musb, void *data),
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void *data);
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static inline void musb_platform_set_vbus(struct musb *musb, int is_on)
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{
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if (musb->ops->set_vbus)
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musb->ops->set_vbus(musb, is_on);
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}
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static inline void musb_platform_enable(struct musb *musb)
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{
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if (musb->ops->enable)
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musb->ops->enable(musb);
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}
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static inline void musb_platform_disable(struct musb *musb)
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{
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if (musb->ops->disable)
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musb->ops->disable(musb);
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}
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static inline int musb_platform_set_mode(struct musb *musb, u8 mode)
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{
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if (!musb->ops->set_mode)
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return 0;
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return musb->ops->set_mode(musb, mode);
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}
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static inline void musb_platform_try_idle(struct musb *musb,
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unsigned long timeout)
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{
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if (musb->ops->try_idle)
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musb->ops->try_idle(musb, timeout);
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}
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static inline int musb_platform_recover(struct musb *musb)
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{
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if (!musb->ops->recover)
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return 0;
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return musb->ops->recover(musb);
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}
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static inline int musb_platform_get_vbus_status(struct musb *musb)
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{
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if (!musb->ops->vbus_status)
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return -EINVAL;
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return musb->ops->vbus_status(musb);
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}
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static inline int musb_platform_init(struct musb *musb)
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{
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if (!musb->ops->init)
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return -EINVAL;
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return musb->ops->init(musb);
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}
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static inline int musb_platform_exit(struct musb *musb)
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{
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if (!musb->ops->exit)
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return -EINVAL;
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return musb->ops->exit(musb);
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}
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static inline void musb_platform_pre_root_reset_end(struct musb *musb)
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{
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if (musb->ops->pre_root_reset_end)
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musb->ops->pre_root_reset_end(musb);
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}
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static inline void musb_platform_post_root_reset_end(struct musb *musb)
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{
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if (musb->ops->post_root_reset_end)
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musb->ops->post_root_reset_end(musb);
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}
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static inline void musb_platform_clear_ep_rxintr(struct musb *musb, int epnum)
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{
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if (musb->ops->clear_ep_rxintr)
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musb->ops->clear_ep_rxintr(musb, epnum);
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}
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static inline void musb_set_state(struct musb *musb,
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enum usb_otg_state otg_state)
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{
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if (musb->xceiv)
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musb->xceiv->otg->state = otg_state;
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else
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musb->otg_state = otg_state;
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}
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static inline enum usb_otg_state musb_get_state(struct musb *musb)
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{
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if (musb->xceiv)
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return musb->xceiv->otg->state;
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return musb->otg_state;
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}
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static inline const char *musb_otg_state_string(struct musb *musb)
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{
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return usb_otg_state_string(musb_get_state(musb));
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}
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/*
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* gets the "dr_mode" property from DT and converts it into musb_mode
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* if the property is not found or not recognized returns MUSB_OTG
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*/
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extern enum musb_mode musb_get_mode(struct device *dev);
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#endif /* __MUSB_CORE_H__ */
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