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