109 lines
2.3 KiB
C
109 lines
2.3 KiB
C
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/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Driver for the NXP ISP1761 device controller
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*
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* Copyright 2021 Linaro, Rui Miguel Silva
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* Copyright 2014 Ideas on Board Oy
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*
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* Contacts:
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* Laurent Pinchart <laurent.pinchart@ideasonboard.com>
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* Rui Miguel Silva <rui.silva@linaro.org>
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*/
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#ifndef _ISP1760_UDC_H_
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#define _ISP1760_UDC_H_
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#include <linux/ioport.h>
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#include <linux/list.h>
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#include <linux/spinlock.h>
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#include <linux/timer.h>
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#include <linux/usb/gadget.h>
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#include "isp1760-regs.h"
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struct isp1760_device;
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struct isp1760_udc;
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enum isp1760_ctrl_state {
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ISP1760_CTRL_SETUP, /* Waiting for a SETUP transaction */
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ISP1760_CTRL_DATA_IN, /* Setup received, data IN stage */
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ISP1760_CTRL_DATA_OUT, /* Setup received, data OUT stage */
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ISP1760_CTRL_STATUS, /* 0-length request in status stage */
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};
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struct isp1760_ep {
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struct isp1760_udc *udc;
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struct usb_ep ep;
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struct list_head queue;
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unsigned int addr;
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unsigned int maxpacket;
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char name[7];
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const struct usb_endpoint_descriptor *desc;
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bool rx_pending;
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bool halted;
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bool wedged;
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};
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/**
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* struct isp1760_udc - UDC state information
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* irq: IRQ number
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* irqname: IRQ name (as passed to request_irq)
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* regs: regmap for UDC registers
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* driver: Gadget driver
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* gadget: Gadget device
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* lock: Protects driver, vbus_timer, ep, ep0_*, DC_EPINDEX register
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* ep: Array of endpoints
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* ep0_state: Control request state for endpoint 0
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* ep0_dir: Direction of the current control request
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* ep0_length: Length of the current control request
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* connected: Tracks gadget driver bus connection state
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*/
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struct isp1760_udc {
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struct isp1760_device *isp;
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int irq;
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char *irqname;
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struct regmap *regs;
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struct regmap_field *fields[DC_FIELD_MAX];
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struct usb_gadget_driver *driver;
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struct usb_gadget gadget;
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spinlock_t lock;
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struct timer_list vbus_timer;
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struct isp1760_ep ep[15];
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enum isp1760_ctrl_state ep0_state;
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u8 ep0_dir;
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u16 ep0_length;
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bool connected;
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bool is_isp1763;
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unsigned int devstatus;
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};
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#ifdef CONFIG_USB_ISP1761_UDC
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int isp1760_udc_register(struct isp1760_device *isp, int irq,
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unsigned long irqflags);
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void isp1760_udc_unregister(struct isp1760_device *isp);
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#else
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static inline int isp1760_udc_register(struct isp1760_device *isp, int irq,
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unsigned long irqflags)
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{
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return 0;
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}
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static inline void isp1760_udc_unregister(struct isp1760_device *isp)
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{
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}
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#endif
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#endif
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