drivers/usb/gadget/ci13xxx_udc.h

   1 /*
   2  * ci13xxx_udc.h - structures, registers, and macros MIPS USB IP core
   3  *
   4  * Copyright (C) 2008 Chipidea - MIPS Technologies, Inc. All rights reserved.
   5  *
   6  * Author: David Lopo
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License version 2 as
  10  * published by the Free Software Foundation.
  11  *
  12  * Description: MIPS USB IP core family device controller
  13  *              Structures, registers and logging macros
  14  */
  15
  16 #ifndef _CI13XXX_h_
  17 #define _CI13XXX_h_
  18
  19 /******************************************************************************
  20  * DEFINE
  21  *****************************************************************************/
  22 #define CI13XXX_PAGE_SIZE  4096ul /* page size for TD's */
  23 #define ENDPT_MAX          (32)
  24 #define CTRL_PAYLOAD_MAX   (64)
  25 #define RX        (0)  /* similar to USB_DIR_OUT but can be used as an index */
  26 #define TX        (1)  /* similar to USB_DIR_IN  but can be used as an index */
  27
  28 /******************************************************************************
  29  * STRUCTURES
  30  *****************************************************************************/
  31 /* DMA layout of transfer descriptors */
  32 struct ci13xxx_td {
  33         /* 0 */
  34         u32 next;
  35 #define TD_TERMINATE          BIT(0)
  36 #define TD_ADDR_MASK          (0xFFFFFFEUL << 5)
  37         /* 1 */
  38         u32 token;
  39 #define TD_STATUS             (0x00FFUL <<  0)
  40 #define TD_STATUS_TR_ERR      BIT(3)
  41 #define TD_STATUS_DT_ERR      BIT(5)
  42 #define TD_STATUS_HALTED      BIT(6)
  43 #define TD_STATUS_ACTIVE      BIT(7)
  44 #define TD_MULTO              (0x0003UL << 10)
  45 #define TD_IOC                BIT(15)
  46 #define TD_TOTAL_BYTES        (0x7FFFUL << 16)
  47         /* 2 */
  48         u32 page[5];
  49 #define TD_CURR_OFFSET        (0x0FFFUL <<  0)
  50 #define TD_FRAME_NUM          (0x07FFUL <<  0)
  51 #define TD_RESERVED_MASK      (0x0FFFUL <<  0)
  52 } __attribute__ ((packed));
  53
  54 /* DMA layout of queue heads */
  55 struct ci13xxx_qh {
  56         /* 0 */
  57         u32 cap;
  58 #define QH_IOS                BIT(15)
  59 #define QH_MAX_PKT            (0x07FFUL << 16)
  60 #define QH_ZLT                BIT(29)
  61 #define QH_MULT               (0x0003UL << 30)
  62         /* 1 */
  63         u32 curr;
  64         /* 2 - 8 */
  65         struct ci13xxx_td        td;
  66         /* 9 */
  67         u32 RESERVED;
  68         struct usb_ctrlrequest   setup;
  69 } __attribute__ ((packed));
  70
  71 /* Extension of usb_request */
  72 struct ci13xxx_req {
  73         struct usb_request   req;
  74         unsigned             map;
  75         struct list_head     queue;
  76         struct ci13xxx_td   *ptr;
  77         dma_addr_t           dma;
  78         struct ci13xxx_td   *zptr;
  79         dma_addr_t           zdma;
  80 };
  81
  82 /* Extension of usb_ep */
  83 struct ci13xxx_ep {
  84         struct usb_ep                          ep;
  85         const struct usb_endpoint_descriptor  *desc;
  86         u8                                     dir;
  87         u8                                     num;
  88         u8                                     type;
  89         char                                   name[16];
  90         struct {
  91                 struct list_head   queue;
  92                 struct ci13xxx_qh *ptr;
  93                 dma_addr_t         dma;
  94         }                                      qh;
  95         int                                    wedge;
  96
  97         /* global resources */
  98         spinlock_t                            *lock;
  99         struct device                         *device;
 100         struct dma_pool                       *td_pool;
 101 };
 102
 103 struct ci13xxx;
 104 struct ci13xxx_udc_driver {
 105         const char      *name;
 106         unsigned long    flags;
 107 #define CI13XXX_REGS_SHARED             BIT(0)
 108 #define CI13XXX_REQUIRE_TRANSCEIVER     BIT(1)
 109 #define CI13XXX_PULLUP_ON_VBUS          BIT(2)
 110 #define CI13XXX_DISABLE_STREAMING       BIT(3)
 111
 112 #define CI13XXX_CONTROLLER_RESET_EVENT          0
 113 #define CI13XXX_CONTROLLER_STOPPED_EVENT        1
 114         void    (*notify_event) (struct ci13xxx *udc, unsigned event);
 115 };
 116
 117 /* CI13XXX UDC descriptor & global resources */
 118 struct ci13xxx {
 119         spinlock_t                *lock;      /* ctrl register bank access */
 120         void __iomem              *regs;      /* registers address space */
 121
 122         struct dma_pool           *qh_pool;   /* DMA pool for queue heads */
 123         struct dma_pool           *td_pool;   /* DMA pool for transfer descs */
 124         struct usb_request        *status;    /* ep0 status request */
 125
 126         struct usb_gadget          gadget;     /* USB slave device */
 127         struct ci13xxx_ep          ci13xxx_ep[ENDPT_MAX]; /* extended endpts */
 128         u32                        ep0_dir;    /* ep0 direction */
 129 #define ep0out ci13xxx_ep[0]
 130 #define ep0in  ci13xxx_ep[hw_ep_max / 2]
 131         u8                         remote_wakeup; /* Is remote wakeup feature
 132                                                         enabled by the host? */
 133         u8                         suspended;  /* suspended by the host */
 134         u8                         test_mode;  /* the selected test mode */
 135
 136         struct usb_gadget_driver  *driver;     /* 3rd party gadget driver */
 137         struct ci13xxx_udc_driver *udc_driver; /* device controller driver */
 138         int                        vbus_active; /* is VBUS active */
 139         struct otg_transceiver    *transceiver; /* Transceiver struct */
 140 };
 141
 142 /******************************************************************************
 143  * REGISTERS
 144  *****************************************************************************/
 145 /* register size */
 146 #define REG_BITS   (32)
 147
 148 /* HCCPARAMS */
 149 #define HCCPARAMS_LEN         BIT(17)
 150
 151 /* DCCPARAMS */
 152 #define DCCPARAMS_DEN         (0x1F << 0)
 153 #define DCCPARAMS_DC          BIT(7)
 154
 155 /* TESTMODE */
 156 #define TESTMODE_FORCE        BIT(0)
 157
 158 /* USBCMD */
 159 #define USBCMD_RS             BIT(0)
 160 #define USBCMD_RST            BIT(1)
 161 #define USBCMD_SUTW           BIT(13)
 162 #define USBCMD_ATDTW          BIT(14)
 163
 164 /* USBSTS & USBINTR */
 165 #define USBi_UI               BIT(0)
 166 #define USBi_UEI              BIT(1)
 167 #define USBi_PCI              BIT(2)
 168 #define USBi_URI              BIT(6)
 169 #define USBi_SLI              BIT(8)
 170
 171 /* DEVICEADDR */
 172 #define DEVICEADDR_USBADRA    BIT(24)
 173 #define DEVICEADDR_USBADR     (0x7FUL << 25)
 174
 175 /* PORTSC */
 176 #define PORTSC_FPR            BIT(6)
 177 #define PORTSC_SUSP           BIT(7)
 178 #define PORTSC_HSP            BIT(9)
 179 #define PORTSC_PTC            (0x0FUL << 16)
 180
 181 /* DEVLC */
 182 #define DEVLC_PSPD            (0x03UL << 25)
 183 #define    DEVLC_PSPD_HS      (0x02UL << 25)
 184
 185 /* USBMODE */
 186 #define USBMODE_CM            (0x03UL <<  0)
 187 #define    USBMODE_CM_IDLE    (0x00UL <<  0)
 188 #define    USBMODE_CM_DEVICE  (0x02UL <<  0)
 189 #define    USBMODE_CM_HOST    (0x03UL <<  0)
 190 #define USBMODE_SLOM          BIT(3)
 191 #define USBMODE_SDIS          BIT(4)
 192
 193 /* ENDPTCTRL */
 194 #define ENDPTCTRL_RXS         BIT(0)
 195 #define ENDPTCTRL_RXT         (0x03UL <<  2)
 196 #define ENDPTCTRL_RXR         BIT(6)         /* reserved for port 0 */
 197 #define ENDPTCTRL_RXE         BIT(7)
 198 #define ENDPTCTRL_TXS         BIT(16)
 199 #define ENDPTCTRL_TXT         (0x03UL << 18)
 200 #define ENDPTCTRL_TXR         BIT(22)        /* reserved for port 0 */
 201 #define ENDPTCTRL_TXE         BIT(23)
 202
 203 /******************************************************************************
 204  * LOGGING
 205  *****************************************************************************/
 206 #define ci13xxx_printk(level, format, args...) \
 207 do { \
 208         if (_udc == NULL) \
 209                 printk(level "[%s] " format "\n", __func__, ## args); \
 210         else \
 211                 dev_printk(level, _udc->gadget.dev.parent, \
 212                            "[%s] " format "\n", __func__, ## args); \
 213 } while (0)
 214
 215 #define err(format, args...)    ci13xxx_printk(KERN_ERR, format, ## args)
 216 #define warn(format, args...)   ci13xxx_printk(KERN_WARNING, format, ## args)
 217 #define info(format, args...)   ci13xxx_printk(KERN_INFO, format, ## args)
 218
 219 #ifdef TRACE
 220 #define trace(format, args...)      ci13xxx_printk(KERN_DEBUG, format, ## args)
 221 #define dbg_trace(format, args...)  dev_dbg(dev, format, ##args)
 222 #else
 223 #define trace(format, args...)      do {} while (0)
 224 #define dbg_trace(format, args...)  do {} while (0)
 225 #endif
 226
 227 #endif  /* _CI13XXX_h_ */