drivers/usb/gadget/udc/at91_udc.h

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * Copyright (C) 2004 by Thomas Rathbone, HP Labs
   4  * Copyright (C) 2005 by Ivan Kokshaysky
   5  * Copyright (C) 2006 by SAN People
   6  */
   7
   8 #ifndef AT91_UDC_H
   9 #define AT91_UDC_H
  10
  11 /*
  12  * USB Device Port (UDP) registers.
  13  * Based on AT91RM9200 datasheet revision E.
  14  */
  15
  16 #define AT91_UDP_FRM_NUM        0x00            /* Frame Number Register */
  17 #define     AT91_UDP_NUM        (0x7ff <<  0)   /* Frame Number */
  18 #define     AT91_UDP_FRM_ERR    (1     << 16)   /* Frame Error */
  19 #define     AT91_UDP_FRM_OK     (1     << 17)   /* Frame OK */
  20
  21 #define AT91_UDP_GLB_STAT       0x04            /* Global State Register */
  22 #define     AT91_UDP_FADDEN     (1 <<  0)       /* Function Address Enable */
  23 #define     AT91_UDP_CONFG      (1 <<  1)       /* Configured */
  24 #define     AT91_UDP_ESR        (1 <<  2)       /* Enable Send Resume */
  25 #define     AT91_UDP_RSMINPR    (1 <<  3)       /* Resume has been sent */
  26 #define     AT91_UDP_RMWUPE     (1 <<  4)       /* Remote Wake Up Enable */
  27
  28 #define AT91_UDP_FADDR          0x08            /* Function Address Register */
  29 #define     AT91_UDP_FADD       (0x7f << 0)     /* Function Address Value */
  30 #define     AT91_UDP_FEN        (1    << 8)     /* Function Enable */
  31
  32 #define AT91_UDP_IER            0x10            /* Interrupt Enable Register */
  33 #define AT91_UDP_IDR            0x14            /* Interrupt Disable Register */
  34 #define AT91_UDP_IMR            0x18            /* Interrupt Mask Register */
  35
  36 #define AT91_UDP_ISR            0x1c            /* Interrupt Status Register */
  37 #define     AT91_UDP_EP(n)      (1 << (n))      /* Endpoint Interrupt Status */
  38 #define     AT91_UDP_RXSUSP     (1 <<  8)       /* USB Suspend Interrupt Status */
  39 #define     AT91_UDP_RXRSM      (1 <<  9)       /* USB Resume Interrupt Status */
  40 #define     AT91_UDP_EXTRSM     (1 << 10)       /* External Resume Interrupt Status [AT91RM9200 only] */
  41 #define     AT91_UDP_SOFINT     (1 << 11)       /* Start of Frame Interrupt Status */
  42 #define     AT91_UDP_ENDBUSRES  (1 << 12)       /* End of Bus Reset Interrupt Status */
  43 #define     AT91_UDP_WAKEUP     (1 << 13)       /* USB Wakeup Interrupt Status [AT91RM9200 only] */
  44
  45 #define AT91_UDP_ICR            0x20            /* Interrupt Clear Register */
  46 #define AT91_UDP_RST_EP         0x28            /* Reset Endpoint Register */
  47
  48 #define AT91_UDP_CSR(n)         (0x30+((n)*4))  /* Endpoint Control/Status Registers 0-7 */
  49 #define     AT91_UDP_TXCOMP     (1 <<  0)       /* Generates IN packet with data previously written in DPR */
  50 #define     AT91_UDP_RX_DATA_BK0 (1 <<  1)      /* Receive Data Bank 0 */
  51 #define     AT91_UDP_RXSETUP    (1 <<  2)       /* Send STALL to the host */
  52 #define     AT91_UDP_STALLSENT  (1 <<  3)       /* Stall Sent / Isochronous error (Isochronous endpoints) */
  53 #define     AT91_UDP_TXPKTRDY   (1 <<  4)       /* Transmit Packet Ready */
  54 #define     AT91_UDP_FORCESTALL (1 <<  5)       /* Force Stall */
  55 #define     AT91_UDP_RX_DATA_BK1 (1 <<  6)      /* Receive Data Bank 1 */
  56 #define     AT91_UDP_DIR        (1 <<  7)       /* Transfer Direction */
  57 #define     AT91_UDP_EPTYPE     (7 <<  8)       /* Endpoint Type */
  58 #define         AT91_UDP_EPTYPE_CTRL            (0 <<  8)
  59 #define         AT91_UDP_EPTYPE_ISO_OUT         (1 <<  8)
  60 #define         AT91_UDP_EPTYPE_BULK_OUT        (2 <<  8)
  61 #define         AT91_UDP_EPTYPE_INT_OUT         (3 <<  8)
  62 #define         AT91_UDP_EPTYPE_ISO_IN          (5 <<  8)
  63 #define         AT91_UDP_EPTYPE_BULK_IN         (6 <<  8)
  64 #define         AT91_UDP_EPTYPE_INT_IN          (7 <<  8)
  65 #define     AT91_UDP_DTGLE      (1 << 11)       /* Data Toggle */
  66 #define     AT91_UDP_EPEDS      (1 << 15)       /* Endpoint Enable/Disable */
  67 #define     AT91_UDP_RXBYTECNT  (0x7ff << 16)   /* Number of bytes in FIFO */
  68
  69 #define AT91_UDP_FDR(n)         (0x50+((n)*4))  /* Endpoint FIFO Data Registers 0-7 */
  70
  71 #define AT91_UDP_TXVC           0x74            /* Transceiver Control Register */
  72 #define     AT91_UDP_TXVC_TXVDIS (1 << 8)       /* Transceiver Disable */
  73 #define     AT91_UDP_TXVC_PUON   (1 << 9)       /* PullUp On [AT91SAM9260 only] */
  74
  75 /*-------------------------------------------------------------------------*/
  76
  77 /*
  78  * controller driver data structures
  79  */
  80
  81 #define NUM_ENDPOINTS   6
  82
  83 /*
  84  * hardware won't disable bus reset, or resume while the controller
  85  * is suspended ... watching suspend helps keep the logic symmetric.
  86  */
  87 #define MINIMUS_INTERRUPTUS \
  88         (AT91_UDP_ENDBUSRES | AT91_UDP_RXRSM | AT91_UDP_RXSUSP)
  89
  90 struct at91_ep {
  91         struct usb_ep                   ep;
  92         struct list_head                queue;
  93         struct at91_udc                 *udc;
  94         void __iomem                    *creg;
  95
  96         unsigned                        maxpacket:16;
  97         u8                              int_mask;
  98         unsigned                        is_pingpong:1;
  99
 100         unsigned                        stopped:1;
 101         unsigned                        is_in:1;
 102         unsigned                        is_iso:1;
 103         unsigned                        fifo_bank:1;
 104 };
 105
 106 struct at91_udc_caps {
 107         int (*init)(struct at91_udc *udc);
 108         void (*pullup)(struct at91_udc *udc, int is_on);
 109 };
 110
 111 struct at91_udc_data {
 112         int     vbus_pin;               /* high == host powering us */
 113         u8      vbus_active_low;        /* vbus polarity */
 114         u8      vbus_polled;            /* Use polling, not interrupt */
 115         int     pullup_pin;             /* active == D+ pulled up */
 116         u8      pullup_active_low;      /* true == pullup_pin is active low */
 117 };
 118
 119 /*
 120  * driver is non-SMP, and just blocks IRQs whenever it needs
 121  * access protection for chip registers or driver state
 122  */
 123 struct at91_udc {
 124         struct usb_gadget               gadget;
 125         struct at91_ep                  ep[NUM_ENDPOINTS];
 126         struct usb_gadget_driver        *driver;
 127         const struct at91_udc_caps      *caps;
 128         unsigned                        vbus:1;
 129         unsigned                        enabled:1;
 130         unsigned                        clocked:1;
 131         unsigned                        suspended:1;
 132         unsigned                        req_pending:1;
 133         unsigned                        wait_for_addr_ack:1;
 134         unsigned                        wait_for_config_ack:1;
 135         unsigned                        active_suspend:1;
 136         u8                              addr;
 137         struct at91_udc_data            board;
 138         struct clk                      *iclk, *fclk;
 139         struct platform_device          *pdev;
 140         struct proc_dir_entry           *pde;
 141         void __iomem                    *udp_baseaddr;
 142         int                             udp_irq;
 143         spinlock_t                      lock;
 144         struct timer_list               vbus_timer;
 145         struct work_struct              vbus_timer_work;
 146         struct regmap                   *matrix;
 147 };
 148
 149 static inline struct at91_udc *to_udc(struct usb_gadget *g)
 150 {
 151         return container_of(g, struct at91_udc, gadget);
 152 }
 153
 154 struct at91_request {
 155         struct usb_request              req;
 156         struct list_head                queue;
 157 };
 158
 159 /*-------------------------------------------------------------------------*/
 160
 161 #ifdef VERBOSE_DEBUG
 162 #    define VDBG                DBG
 163 #else
 164 #    define VDBG(stuff...)      do{}while(0)
 165 #endif
 166
 167 #ifdef PACKET_TRACE
 168 #    define PACKET              VDBG
 169 #else
 170 #    define PACKET(stuff...)    do{}while(0)
 171 #endif
 172
 173 #define ERR(stuff...)           pr_err("udc: " stuff)
 174 #define WARNING(stuff...)       pr_warn("udc: " stuff)
 175 #define INFO(stuff...)          pr_info("udc: " stuff)
 176 #define DBG(stuff...)           pr_debug("udc: " stuff)
 177
 178 #endif
 179