drivers/usb/gadget/omap_udc.h

   1 /*
   2  * omap_udc.h -- for omap 3.2 udc, with OTG support
   3  *
   4  * 2004 (C) Texas Instruments, Inc.
   5  * 2004 (C) David Brownell
   6  */
   7
   8 /*
   9  * USB device/endpoint management registers
  10  */
  11 #define UDC_REG(offset)              __REG16(UDC_BASE + (offset))
  12
  13 #define UDC_REV_REG                     UDC_REG(0x0)    /* Revision */
  14 #define UDC_EP_NUM_REG                  UDC_REG(0x4)    /* Which endpoint */
  15 #       define  UDC_SETUP_SEL           (1 << 6)
  16 #       define  UDC_EP_SEL              (1 << 5)
  17 #       define  UDC_EP_DIR              (1 << 4)
  18         /* low 4 bits for endpoint number */
  19 #define UDC_DATA_REG                    UDC_REG(0x08)   /* Endpoint FIFO */
  20 #define UDC_CTRL_REG                    UDC_REG(0x0C)   /* Endpoint control */
  21 #       define  UDC_CLR_HALT            (1 << 7)
  22 #       define  UDC_SET_HALT            (1 << 6)
  23 #       define  UDC_CLRDATA_TOGGLE      (1 << 3)
  24 #       define  UDC_SET_FIFO_EN         (1 << 2)
  25 #       define  UDC_CLR_EP              (1 << 1)
  26 #       define  UDC_RESET_EP            (1 << 0)
  27 #define UDC_STAT_FLG_REG                UDC_REG(0x10)   /* Endpoint status */
  28 #       define  UDC_NO_RXPACKET         (1 << 15)
  29 #       define  UDC_MISS_IN             (1 << 14)
  30 #       define  UDC_DATA_FLUSH          (1 << 13)
  31 #       define  UDC_ISO_ERR             (1 << 12)
  32 #       define  UDC_ISO_FIFO_EMPTY      (1 << 9)
  33 #       define  UDC_ISO_FIFO_FULL       (1 << 8)
  34 #       define  UDC_EP_HALTED           (1 << 6)
  35 #       define  UDC_STALL               (1 << 5)
  36 #       define  UDC_NAK                 (1 << 4)
  37 #       define  UDC_ACK                 (1 << 3)
  38 #       define  UDC_FIFO_EN             (1 << 2)
  39 #       define  UDC_NON_ISO_FIFO_EMPTY  (1 << 1)
  40 #       define  UDC_NON_ISO_FIFO_FULL   (1 << 0)
  41 #define UDC_RXFSTAT_REG                 UDC_REG(0x14)   /* OUT bytecount */
  42 #define UDC_SYSCON1_REG                 UDC_REG(0x18)   /* System config 1 */
  43 #       define  UDC_CFG_LOCK            (1 << 8)
  44 #       define  UDC_DATA_ENDIAN         (1 << 7)
  45 #       define  UDC_DMA_ENDIAN          (1 << 6)
  46 #       define  UDC_NAK_EN              (1 << 4)
  47 #       define  UDC_AUTODECODE_DIS      (1 << 3)
  48 #       define  UDC_SELF_PWR            (1 << 2)
  49 #       define  UDC_SOFF_DIS            (1 << 1)
  50 #       define  UDC_PULLUP_EN           (1 << 0)
  51 #define UDC_SYSCON2_REG                 UDC_REG(0x1C)   /* System config 2 */
  52 #       define  UDC_RMT_WKP             (1 << 6)
  53 #       define  UDC_STALL_CMD           (1 << 5)
  54 #       define  UDC_DEV_CFG             (1 << 3)
  55 #       define  UDC_CLR_CFG             (1 << 2)
  56 #define UDC_DEVSTAT_REG                 UDC_REG(0x20)   /* Device status */
  57 #       define  UDC_B_HNP_ENABLE        (1 << 9)
  58 #       define  UDC_A_HNP_SUPPORT       (1 << 8)
  59 #       define  UDC_A_ALT_HNP_SUPPORT   (1 << 7)
  60 #       define  UDC_R_WK_OK             (1 << 6)
  61 #       define  UDC_USB_RESET           (1 << 5)
  62 #       define  UDC_SUS                 (1 << 4)
  63 #       define  UDC_CFG                 (1 << 3)
  64 #       define  UDC_ADD                 (1 << 2)
  65 #       define  UDC_DEF                 (1 << 1)
  66 #       define  UDC_ATT                 (1 << 0)
  67 #define UDC_SOF_REG                     UDC_REG(0x24)   /* Start of frame */
  68 #       define  UDC_FT_LOCK             (1 << 12)
  69 #       define  UDC_TS_OK               (1 << 11)
  70 #       define  UDC_TS                  0x03ff
  71 #define UDC_IRQ_EN_REG                  UDC_REG(0x28)   /* Interrupt enable */
  72 #       define  UDC_SOF_IE              (1 << 7)
  73 #       define  UDC_EPN_RX_IE           (1 << 5)
  74 #       define  UDC_EPN_TX_IE           (1 << 4)
  75 #       define  UDC_DS_CHG_IE           (1 << 3)
  76 #       define  UDC_EP0_IE              (1 << 0)
  77 #define UDC_DMA_IRQ_EN_REG              UDC_REG(0x2C)   /* DMA irq enable */
  78         /* rx/tx dma channels numbered 1-3 not 0-2 */
  79 #       define  UDC_TX_DONE_IE(n)       (1 << (4 * (n) - 2))
  80 #       define  UDC_RX_CNT_IE(n)        (1 << (4 * (n) - 3))
  81 #       define  UDC_RX_EOT_IE(n)        (1 << (4 * (n) - 4))
  82 #define UDC_IRQ_SRC_REG                 UDC_REG(0x30)   /* Interrupt source */
  83 #       define  UDC_TXN_DONE            (1 << 10)
  84 #       define  UDC_RXN_CNT             (1 << 9)
  85 #       define  UDC_RXN_EOT             (1 << 8)
  86 #       define  UDC_SOF                 (1 << 7)
  87 #       define  UDC_EPN_RX              (1 << 5)
  88 #       define  UDC_EPN_TX              (1 << 4)
  89 #       define  UDC_DS_CHG              (1 << 3)
  90 #       define  UDC_SETUP               (1 << 2)
  91 #       define  UDC_EP0_RX              (1 << 1)
  92 #       define  UDC_EP0_TX              (1 << 0)
  93 #       define  UDC_IRQ_SRC_MASK        0x7bf
  94 #define UDC_EPN_STAT_REG                UDC_REG(0x34)   /* EP irq status */
  95 #define UDC_DMAN_STAT_REG               UDC_REG(0x38)   /* DMA irq status */
  96 #       define  UDC_DMA_RX_SB           (1 << 12)
  97 #       define  UDC_DMA_RX_SRC(x)       (((x)>>8) & 0xf)
  98 #       define  UDC_DMA_TX_SRC(x)       (((x)>>0) & 0xf)
  99
 100
 101 /* DMA configuration registers:  up to three channels in each direction.  */
 102 #define UDC_RXDMA_CFG_REG               UDC_REG(0x40)   /* 3 eps for RX DMA */
 103 #       define  UDC_DMA_REQ             (1 << 12)
 104 #define UDC_TXDMA_CFG_REG               UDC_REG(0x44)   /* 3 eps for TX DMA */
 105 #define UDC_DATA_DMA_REG                UDC_REG(0x48)   /* rx/tx fifo addr */
 106
 107 /* rx/tx dma control, numbering channels 1-3 not 0-2 */
 108 #define UDC_TXDMA_REG(chan)             UDC_REG(0x50 - 4 + 4 * (chan))
 109 #       define UDC_TXN_EOT              (1 << 15)       /* bytes vs packets */
 110 #       define UDC_TXN_START            (1 << 14)       /* start transfer */
 111 #       define UDC_TXN_TSC              0x03ff          /* units in xfer */
 112 #define UDC_RXDMA_REG(chan)             UDC_REG(0x60 - 4 + 4 * (chan))
 113 #       define UDC_RXN_STOP             (1 << 15)       /* enable EOT irq */
 114 #       define UDC_RXN_TC               0x00ff          /* packets in xfer */
 115
 116
 117 /*
 118  * Endpoint configuration registers (used before CFG_LOCK is set)
 119  * UDC_EP_TX_REG(0) is unused
 120  */
 121 #define UDC_EP_RX_REG(endpoint)         UDC_REG(0x80 + (endpoint)*4)
 122 #       define  UDC_EPN_RX_VALID        (1 << 15)
 123 #       define  UDC_EPN_RX_DB           (1 << 14)
 124         /* buffer size in bits 13, 12 */
 125 #       define  UDC_EPN_RX_ISO          (1 << 11)
 126         /* buffer pointer in low 11 bits */
 127 #define UDC_EP_TX_REG(endpoint)         UDC_REG(0xc0 + (endpoint)*4)
 128         /* same bitfields as in RX_REG */
 129
 130 /*-------------------------------------------------------------------------*/
 131
 132 struct omap_req {
 133         struct usb_request              req;
 134         struct list_head                queue;
 135         unsigned                        dma_bytes;
 136         unsigned                        mapped:1;
 137 };
 138
 139 struct omap_ep {
 140         struct usb_ep                   ep;
 141         struct list_head                queue;
 142         unsigned long                   irqs;
 143         struct list_head                iso;
 144         const struct usb_endpoint_descriptor    *desc;
 145         char                            name[14];
 146         u16                             maxpacket;
 147         u8                              bEndpointAddress;
 148         u8                              bmAttributes;
 149         unsigned                        double_buf:1;
 150         unsigned                        stopped:1;
 151         unsigned                        fnf:1;
 152         unsigned                        has_dma:1;
 153         u8                              ackwait;
 154         u8                              dma_channel;
 155         u16                             dma_counter;
 156         int                             lch;
 157         struct omap_udc                 *udc;
 158         struct timer_list               timer;
 159 };
 160
 161 struct omap_udc {
 162         struct usb_gadget               gadget;
 163         struct usb_gadget_driver        *driver;
 164         spinlock_t                      lock;
 165         struct omap_ep                  ep[32];
 166         u16                             devstat;
 167         u16                             clr_halt;
 168         struct otg_transceiver          *transceiver;
 169         struct list_head                iso;
 170         unsigned                        softconnect:1;
 171         unsigned                        vbus_active:1;
 172         unsigned                        ep0_pending:1;
 173         unsigned                        ep0_in:1;
 174         unsigned                        ep0_set_config:1;
 175         unsigned                        ep0_reset_config:1;
 176         unsigned                        ep0_setup:1;
 177         struct completion               *done;
 178         struct clk                      *dc_clk;
 179         struct clk                      *hhc_clk;
 180         unsigned                        clk_requested:1;
 181 };
 182
 183 /*-------------------------------------------------------------------------*/
 184
 185 #ifdef VERBOSE
 186 #    define VDBG                DBG
 187 #else
 188 #    define VDBG(stuff...)      do{}while(0)
 189 #endif
 190
 191 #define ERR(stuff...)           pr_err("udc: " stuff)
 192 #define WARN(stuff...)          pr_warning("udc: " stuff)
 193 #define INFO(stuff...)          pr_info("udc: " stuff)
 194 #define DBG(stuff...)           pr_debug("udc: " stuff)
 195
 196 /*-------------------------------------------------------------------------*/
 197
 198 #define MOD_CONF_CTRL_0_REG     __REG32(MOD_CONF_CTRL_0)
 199 #define VBUS_W2FC_1510          (1 << 17)       /* 0 gpio0, 1 dvdd2 pin */
 200
 201 #define FUNC_MUX_CTRL_0_REG     __REG32(FUNC_MUX_CTRL_0)
 202 #define VBUS_CTRL_1510          (1 << 19)       /* 1 connected (software) */
 203 #define VBUS_MODE_1510          (1 << 18)       /* 0 hardware, 1 software */
 204
 205 #define HMC_1510        ((MOD_CONF_CTRL_0_REG >> 1) & 0x3f)
 206 #define HMC_1610        (OTG_SYSCON_2_REG & 0x3f)
 207 #define HMC             (cpu_is_omap15xx() ? HMC_1510 : HMC_1610)
 208