drivers/usb/isp1760/isp1760-udc.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  * Driver for the NXP ISP1761 device controller
   4  *
   5  * Copyright 2021 Linaro, Rui Miguel Silva
   6  * Copyright 2014 Ideas on Board Oy
   7  *
   8  * Contacts:
   9  *      Laurent Pinchart <laurent.pinchart@ideasonboard.com>
  10  *      Rui Miguel Silva <rui.silva@linaro.org>
  11  */
  12
  13 #ifndef _ISP1760_UDC_H_
  14 #define _ISP1760_UDC_H_
  15
  16 #include <linux/ioport.h>
  17 #include <linux/list.h>
  18 #include <linux/spinlock.h>
  19 #include <linux/timer.h>
  20 #include <linux/usb/gadget.h>
  21
  22 #include "isp1760-regs.h"
  23
  24 struct isp1760_device;
  25 struct isp1760_udc;
  26
  27 enum isp1760_ctrl_state {
  28         ISP1760_CTRL_SETUP,             /* Waiting for a SETUP transaction */
  29         ISP1760_CTRL_DATA_IN,           /* Setup received, data IN stage */
  30         ISP1760_CTRL_DATA_OUT,          /* Setup received, data OUT stage */
  31         ISP1760_CTRL_STATUS,            /* 0-length request in status stage */
  32 };
  33
  34 struct isp1760_ep {
  35         struct isp1760_udc *udc;
  36         struct usb_ep ep;
  37
  38         struct list_head queue;
  39
  40         unsigned int addr;
  41         unsigned int maxpacket;
  42         char name[7];
  43
  44         const struct usb_endpoint_descriptor *desc;
  45
  46         bool rx_pending;
  47         bool halted;
  48         bool wedged;
  49 };
  50
  51 /**
  52  * struct isp1760_udc - UDC state information
  53  * irq: IRQ number
  54  * irqname: IRQ name (as passed to request_irq)
  55  * regs: regmap for UDC registers
  56  * driver: Gadget driver
  57  * gadget: Gadget device
  58  * lock: Protects driver, vbus_timer, ep, ep0_*, DC_EPINDEX register
  59  * ep: Array of endpoints
  60  * ep0_state: Control request state for endpoint 0
  61  * ep0_dir: Direction of the current control request
  62  * ep0_length: Length of the current control request
  63  * connected: Tracks gadget driver bus connection state
  64  */
  65 struct isp1760_udc {
  66         struct isp1760_device *isp;
  67
  68         int irq;
  69         char *irqname;
  70
  71         struct regmap *regs;
  72         struct regmap_field *fields[DC_FIELD_MAX];
  73
  74         struct usb_gadget_driver *driver;
  75         struct usb_gadget gadget;
  76
  77         spinlock_t lock;
  78         struct timer_list vbus_timer;
  79
  80         struct isp1760_ep ep[15];
  81
  82         enum isp1760_ctrl_state ep0_state;
  83         u8 ep0_dir;
  84         u16 ep0_length;
  85
  86         bool connected;
  87         bool is_isp1763;
  88
  89         unsigned int devstatus;
  90 };
  91
  92 #ifdef CONFIG_USB_ISP1761_UDC
  93 int isp1760_udc_register(struct isp1760_device *isp, int irq,
  94                          unsigned long irqflags);
  95 void isp1760_udc_unregister(struct isp1760_device *isp);
  96 #else
  97 static inline int isp1760_udc_register(struct isp1760_device *isp, int irq,
  98                                        unsigned long irqflags)
  99 {
 100         return 0;
 101 }
 102
 103 static inline void isp1760_udc_unregister(struct isp1760_device *isp)
 104 {
 105 }
 106 #endif
 107
 108 #endif