drivers/usb/gadget/at91_udc.h

   1 /*
   2  * Copyright (C) 2004 by Thomas Rathbone, HP Labs
   3  * Copyright (C) 2005 by Ivan Kokshaysky
   4  * Copyright (C) 2006 by SAN People
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the
  18  * Free Software Foundation, Inc.,
  19  * 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  20  */
  21
  22 #ifndef AT91_UDC_H
  23 #define AT91_UDC_H
  24
  25 /*
  26  * USB Device Port (UDP) registers.
  27  * Based on AT91RM9200 datasheet revision E.
  28  */
  29
  30 #define AT91_UDP_FRM_NUM        0x00            /* Frame Number Register */
  31 #define     AT91_UDP_NUM        (0x7ff <<  0)   /* Frame Number */
  32 #define     AT91_UDP_FRM_ERR    (1     << 16)   /* Frame Error */
  33 #define     AT91_UDP_FRM_OK     (1     << 17)   /* Frame OK */
  34
  35 #define AT91_UDP_GLB_STAT       0x04            /* Global State Register */
  36 #define     AT91_UDP_FADDEN     (1 <<  0)       /* Function Address Enable */
  37 #define     AT91_UDP_CONFG      (1 <<  1)       /* Configured */
  38 #define     AT91_UDP_ESR        (1 <<  2)       /* Enable Send Resume */
  39 #define     AT91_UDP_RSMINPR    (1 <<  3)       /* Resume has been sent */
  40 #define     AT91_UDP_RMWUPE     (1 <<  4)       /* Remote Wake Up Enable */
  41
  42 #define AT91_UDP_FADDR          0x08            /* Function Address Register */
  43 #define     AT91_UDP_FADD       (0x7f << 0)     /* Function Address Value */
  44 #define     AT91_UDP_FEN        (1    << 8)     /* Function Enable */
  45
  46 #define AT91_UDP_IER            0x10            /* Interrupt Enable Register */
  47 #define AT91_UDP_IDR            0x14            /* Interrupt Disable Register */
  48 #define AT91_UDP_IMR            0x18            /* Interrupt Mask Register */
  49
  50 #define AT91_UDP_ISR            0x1c            /* Interrupt Status Register */
  51 #define     AT91_UDP_EP(n)      (1 << (n))      /* Endpoint Interrupt Status */
  52 #define     AT91_UDP_RXSUSP     (1 <<  8)       /* USB Suspend Interrupt Status */
  53 #define     AT91_UDP_RXRSM      (1 <<  9)       /* USB Resume Interrupt Status */
  54 #define     AT91_UDP_EXTRSM     (1 << 10)       /* External Resume Interrupt Status */
  55 #define     AT91_UDP_SOFINT     (1 << 11)       /* Start of Frame Interrupt Status */
  56 #define     AT91_UDP_ENDBUSRES  (1 << 12)       /* End of Bus Reset Interrpt Status */
  57 #define     AT91_UDP_WAKEUP     (1 << 13)       /* USB Wakeup Interrupt Status */
  58
  59 #define AT91_UDP_ICR            0x20            /* Interrupt Clear Register */
  60 #define AT91_UDP_RST_EP         0x28            /* Reset Endpoint Register */
  61
  62 #define AT91_UDP_CSR(n)         (0x30+((n)*4))  /* Endpoint Control/Status Registers 0-7 */
  63 #define     AT91_UDP_TXCOMP     (1 <<  0)       /* Generates IN packet with data previously written in DPR */
  64 #define     AT91_UDP_RX_DATA_BK0 (1 <<  1)      /* Receive Data Bank 0 */
  65 #define     AT91_UDP_RXSETUP    (1 <<  2)       /* Send STALL to the host */
  66 #define     AT91_UDP_STALLSENT  (1 <<  3)       /* Stall Sent / Isochronous error (Isochronous endpoints) */
  67 #define     AT91_UDP_TXPKTRDY   (1 <<  4)       /* Transmit Packet Ready */
  68 #define     AT91_UDP_FORCESTALL (1 <<  5)       /* Force Stall */
  69 #define     AT91_UDP_RX_DATA_BK1 (1 <<  6)      /* Receive Data Bank 1 */
  70 #define     AT91_UDP_DIR        (1 <<  7)       /* Transfer Direction */
  71 #define     AT91_UDP_EPTYPE     (7 <<  8)       /* Endpoint Type */
  72 #define         AT91_UDP_EPTYPE_CTRL            (0 <<  8)
  73 #define         AT91_UDP_EPTYPE_ISO_OUT         (1 <<  8)
  74 #define         AT91_UDP_EPTYPE_BULK_OUT        (2 <<  8)
  75 #define         AT91_UDP_EPTYPE_INT_OUT         (3 <<  8)
  76 #define         AT91_UDP_EPTYPE_ISO_IN          (5 <<  8)
  77 #define         AT91_UDP_EPTYPE_BULK_IN         (6 <<  8)
  78 #define         AT91_UDP_EPTYPE_INT_IN          (7 <<  8)
  79 #define     AT91_UDP_DTGLE      (1 << 11)       /* Data Toggle */
  80 #define     AT91_UDP_EPEDS      (1 << 15)       /* Endpoint Enable/Disable */
  81 #define     AT91_UDP_RXBYTECNT  (0x7ff << 16)   /* Number of bytes in FIFO */
  82
  83 #define AT91_UDP_FDR(n)         (0x50+((n)*4))  /* Endpoint FIFO Data Registers 0-7 */
  84
  85 #define AT91_UDP_TXVC           0x74            /* Transceiver Control Register */
  86 #define     AT91_UDP_TXVC_TXVDIS (1 << 8)       /* Transceiver Disable */
  87
  88
  89 /*-------------------------------------------------------------------------*/
  90
  91 /*
  92  * controller driver data structures
  93  */
  94
  95 #define NUM_ENDPOINTS   6
  96
  97 /*
  98  * hardware won't disable bus reset, or resume while the controller
  99  * is suspended ... watching suspend helps keep the logic symmetric.
 100  */
 101 #define MINIMUS_INTERRUPTUS \
 102         (AT91_UDP_ENDBUSRES | AT91_UDP_RXRSM | AT91_UDP_RXSUSP)
 103
 104 struct at91_ep {
 105         struct usb_ep                   ep;
 106         struct list_head                queue;
 107         struct at91_udc                 *udc;
 108         void __iomem                    *creg;
 109
 110         unsigned                        maxpacket:16;
 111         u8                              int_mask;
 112         unsigned                        is_pingpong:1;
 113
 114         unsigned                        stopped:1;
 115         unsigned                        is_in:1;
 116         unsigned                        is_iso:1;
 117         unsigned                        fifo_bank:1;
 118
 119         const struct usb_endpoint_descriptor
 120                                         *desc;
 121 };
 122
 123 /*
 124  * driver is non-SMP, and just blocks IRQs whenever it needs
 125  * access protection for chip registers or driver state
 126  */
 127 struct at91_udc {
 128         struct usb_gadget               gadget;
 129         struct at91_ep                  ep[NUM_ENDPOINTS];
 130         struct usb_gadget_driver        *driver;
 131         unsigned                        vbus:1;
 132         unsigned                        enabled:1;
 133         unsigned                        clocked:1;
 134         unsigned                        suspended:1;
 135         unsigned                        req_pending:1;
 136         unsigned                        wait_for_addr_ack:1;
 137         unsigned                        wait_for_config_ack:1;
 138         unsigned                        selfpowered:1;
 139         u8                              addr;
 140         struct at91_udc_data            board;
 141         struct clk                      *iclk, *fclk;
 142         struct platform_device          *pdev;
 143         struct proc_dir_entry           *pde;
 144 };
 145
 146 static inline struct at91_udc *to_udc(struct usb_gadget *g)
 147 {
 148         return container_of(g, struct at91_udc, gadget);
 149 }
 150
 151 struct at91_request {
 152         struct usb_request              req;
 153         struct list_head                queue;
 154 };
 155
 156 /*-------------------------------------------------------------------------*/
 157
 158 #ifdef DEBUG
 159 #define DBG(stuff...)           printk(KERN_DEBUG "udc: " stuff)
 160 #else
 161 #define DBG(stuff...)           do{}while(0)
 162 #endif
 163
 164 #ifdef VERBOSE
 165 #    define VDBG                DBG
 166 #else
 167 #    define VDBG(stuff...)      do{}while(0)
 168 #endif
 169
 170 #ifdef PACKET_TRACE
 171 #    define PACKET              VDBG
 172 #else
 173 #    define PACKET(stuff...)    do{}while(0)
 174 #endif
 175
 176 #define ERR(stuff...)           printk(KERN_ERR "udc: " stuff)
 177 #define WARN(stuff...)          printk(KERN_WARNING "udc: " stuff)
 178 #define INFO(stuff...)          printk(KERN_INFO "udc: " stuff)
 179
 180 #endif
 181