drivers/usb/isp1760/isp1760-udc.h

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