drivers/usb/gadget/imx_udc.h

   1 /*
   2  *      Copyright (C) 2005 Mike Lee(eemike@gmail.com)
   3  *
   4  *      This udc driver is now under testing and code is based on pxa2xx_udc.h
   5  *      Please use it with your own risk!
   6  *
   7  *      This program is free software; you can redistribute it and/or modify
   8  *      it under the terms of the GNU General Public License as published by
   9  *      the Free Software Foundation; either version 2 of the License, or
  10  *      (at your option) any later version.
  11  */
  12
  13 #ifndef __LINUX_USB_GADGET_IMX_H
  14 #define __LINUX_USB_GADGET_IMX_H
  15
  16 #include <linux/types.h>
  17
  18 /* Helper macros */
  19 #define EP_NO(ep)       ((ep->bEndpointAddress) & ~USB_DIR_IN) /* IN:1, OUT:0 */
  20 #define EP_DIR(ep)      ((ep->bEndpointAddress) & USB_DIR_IN ? 1 : 0)
  21 #define IMX_USB_NB_EP   6
  22
  23 /* Driver structures */
  24 struct imx_request {
  25         struct usb_request                      req;
  26         struct list_head                        queue;
  27         unsigned int                            in_use;
  28 };
  29
  30 enum ep0_state {
  31         EP0_IDLE,
  32         EP0_IN_DATA_PHASE,
  33         EP0_OUT_DATA_PHASE,
  34         EP0_CONFIG,
  35         EP0_STALL,
  36 };
  37
  38 struct imx_ep_struct {
  39         struct usb_ep                           ep;
  40         struct imx_udc_struct                   *imx_usb;
  41         struct list_head                        queue;
  42         unsigned char                           stopped;
  43         unsigned char                           fifosize;
  44         unsigned char                           bEndpointAddress;
  45         unsigned char                           bmAttributes;
  46 };
  47
  48 struct imx_udc_struct {
  49         struct usb_gadget                       gadget;
  50         struct usb_gadget_driver                *driver;
  51         struct device                           *dev;
  52         struct imx_ep_struct                    imx_ep[IMX_USB_NB_EP];
  53         struct clk                              *clk;
  54         struct timer_list                       timer;
  55         enum ep0_state                          ep0state;
  56         struct resource                         *res;
  57         void __iomem                            *base;
  58         unsigned char                           set_config;
  59         int                                     cfg,
  60                                                 intf,
  61                                                 alt,
  62                                                 usbd_int[7];
  63 };
  64
  65 /* USB registers */
  66 #define  USB_FRAME              (0x00)  /* USB frame */
  67 #define  USB_SPEC               (0x04)  /* USB Spec */
  68 #define  USB_STAT               (0x08)  /* USB Status */
  69 #define  USB_CTRL               (0x0C)  /* USB Control */
  70 #define  USB_DADR               (0x10)  /* USB Desc RAM addr */
  71 #define  USB_DDAT               (0x14)  /* USB Desc RAM/EP buffer data */
  72 #define  USB_INTR               (0x18)  /* USB interrupt */
  73 #define  USB_MASK               (0x1C)  /* USB Mask */
  74 #define  USB_ENAB               (0x24)  /* USB Enable */
  75 #define  USB_EP_STAT(x)         (0x30 + (x*0x30)) /* USB status/control */
  76 #define  USB_EP_INTR(x)         (0x34 + (x*0x30)) /* USB interrupt */
  77 #define  USB_EP_MASK(x)         (0x38 + (x*0x30)) /* USB mask */
  78 #define  USB_EP_FDAT(x)         (0x3C + (x*0x30)) /* USB FIFO data */
  79 #define  USB_EP_FDAT0(x)        (0x3C + (x*0x30)) /* USB FIFO data */
  80 #define  USB_EP_FDAT1(x)        (0x3D + (x*0x30)) /* USB FIFO data */
  81 #define  USB_EP_FDAT2(x)        (0x3E + (x*0x30)) /* USB FIFO data */
  82 #define  USB_EP_FDAT3(x)        (0x3F + (x*0x30)) /* USB FIFO data */
  83 #define  USB_EP_FSTAT(x)        (0x40 + (x*0x30)) /* USB FIFO status */
  84 #define  USB_EP_FCTRL(x)        (0x44 + (x*0x30)) /* USB FIFO control */
  85 #define  USB_EP_LRFP(x)         (0x48 + (x*0x30)) /* USB last rd f. pointer */
  86 #define  USB_EP_LWFP(x)         (0x4C + (x*0x30)) /* USB last wr f. pointer */
  87 #define  USB_EP_FALRM(x)        (0x50 + (x*0x30)) /* USB FIFO alarm */
  88 #define  USB_EP_FRDP(x)         (0x54 + (x*0x30)) /* USB FIFO read pointer */
  89 #define  USB_EP_FWRP(x)         (0x58 + (x*0x30)) /* USB FIFO write pointer */
  90 /* USB Control Register Bit Fields.*/
  91 #define CTRL_CMDOVER            (1<<6)  /* UDC status */
  92 #define CTRL_CMDERROR           (1<<5)  /* UDC status */
  93 #define CTRL_FE_ENA             (1<<3)  /* Enable Font End logic */
  94 #define CTRL_UDC_RST            (1<<2)  /* UDC reset */
  95 #define CTRL_AFE_ENA            (1<<1)  /* Analog Font end enable */
  96 #define CTRL_RESUME             (1<<0)  /* UDC resume */
  97 /* USB Status Register Bit Fields.*/
  98 #define STAT_RST                (1<<8)
  99 #define STAT_SUSP               (1<<7)
 100 #define STAT_CFG                (3<<5)
 101 #define STAT_INTF               (3<<3)
 102 #define STAT_ALTSET             (7<<0)
 103 /* USB Interrupt Status/Mask Registers Bit fields */
 104 #define INTR_WAKEUP             (1<<31) /* Wake up Interrupt */
 105 #define INTR_MSOF               (1<<7)  /* Missed Start of Frame */
 106 #define INTR_SOF                (1<<6)  /* Start of Frame */
 107 #define INTR_RESET_STOP         (1<<5)  /* Reset Signaling stop */
 108 #define INTR_RESET_START        (1<<4)  /* Reset Signaling start */
 109 #define INTR_RESUME             (1<<3)  /* Suspend to resume */
 110 #define INTR_SUSPEND            (1<<2)  /* Active to suspend */
 111 #define INTR_FRAME_MATCH        (1<<1)  /* Frame matched */
 112 #define INTR_CFG_CHG            (1<<0)  /* Configuration change occurred */
 113 /* USB Enable Register Bit Fields.*/
 114 #define ENAB_RST                (1<<31) /* Reset USB modules */
 115 #define ENAB_ENAB               (1<<30) /* Enable USB modules*/
 116 #define ENAB_SUSPEND            (1<<29) /* Suspend USB modules */
 117 #define ENAB_ENDIAN             (1<<28) /* Endian of USB modules */
 118 #define ENAB_PWRMD              (1<<0)  /* Power mode of USB modules */
 119 /* USB Descriptor Ram Address Register bit fields */
 120 #define DADR_CFG                (1<<31) /* Configuration */
 121 #define DADR_BSY                (1<<30) /* Busy status */
 122 #define DADR_DADR               (0x1FF) /* Descriptor Ram Address */
 123 /* USB Descriptor RAM/Endpoint Buffer Data Register bit fields */
 124 #define DDAT_DDAT               (0xFF)  /* Descriptor Endpoint Buffer */
 125 /* USB Endpoint Status Register bit fields */
 126 #define EPSTAT_BCOUNT           (0x7F<<16)      /* Endpoint FIFO byte count */
 127 #define EPSTAT_SIP              (1<<8)  /* Endpoint setup in progress */
 128 #define EPSTAT_DIR              (1<<7)  /* Endpoint transfer direction */
 129 #define EPSTAT_MAX              (3<<5)  /* Endpoint Max packet size */
 130 #define EPSTAT_TYP              (3<<3)  /* Endpoint type */
 131 #define EPSTAT_ZLPS             (1<<2)  /* Send zero length packet */
 132 #define EPSTAT_FLUSH            (1<<1)  /* Endpoint FIFO Flush */
 133 #define EPSTAT_STALL            (1<<0)  /* Force stall */
 134 /* USB Endpoint FIFO Status Register bit fields */
 135 #define FSTAT_FRAME_STAT        (0xF<<24)       /* Frame status bit [0-3] */
 136 #define FSTAT_ERR               (1<<22) /* FIFO error */
 137 #define FSTAT_UF                (1<<21) /* FIFO underflow */
 138 #define FSTAT_OF                (1<<20) /* FIFO overflow */
 139 #define FSTAT_FR                (1<<19) /* FIFO frame ready */
 140 #define FSTAT_FULL              (1<<18) /* FIFO full */
 141 #define FSTAT_ALRM              (1<<17) /* FIFO alarm */
 142 #define FSTAT_EMPTY             (1<<16) /* FIFO empty */
 143 /* USB Endpoint FIFO Control Register bit fields */
 144 #define FCTRL_WFR               (1<<29) /* Write frame end */
 145 /* USB Endpoint Interrupt Status Regsiter bit fields */
 146 #define EPINTR_FIFO_FULL        (1<<8)  /* fifo full */
 147 #define EPINTR_FIFO_EMPTY       (1<<7)  /* fifo empty */
 148 #define EPINTR_FIFO_ERROR       (1<<6)  /* fifo error */
 149 #define EPINTR_FIFO_HIGH        (1<<5)  /* fifo high */
 150 #define EPINTR_FIFO_LOW         (1<<4)  /* fifo low */
 151 #define EPINTR_MDEVREQ          (1<<3)  /* multi Device request */
 152 #define EPINTR_EOT              (1<<2)  /* fifo end of transfer */
 153 #define EPINTR_DEVREQ           (1<<1)  /* Device request */
 154 #define EPINTR_EOF              (1<<0)  /* fifo end of frame */
 155
 156 /* Debug macros */
 157 #ifdef DEBUG
 158
 159 /* #define DEBUG_REQ */
 160 /* #define DEBUG_TRX */
 161 /* #define DEBUG_INIT */
 162 /* #define DEBUG_EP0 */
 163 /* #define DEBUG_EPX */
 164 /* #define DEBUG_IRQ */
 165 /* #define DEBUG_EPIRQ */
 166 /* #define DEBUG_DUMP */
 167 /* #define DEBUG_ERR */
 168
 169 #ifdef DEBUG_REQ
 170         #define D_REQ(dev, args...)     dev_dbg(dev, ## args)
 171 #else
 172         #define D_REQ(dev, args...)     do {} while (0)
 173 #endif /* DEBUG_REQ */
 174
 175 #ifdef DEBUG_TRX
 176         #define D_TRX(dev, args...)     dev_dbg(dev, ## args)
 177 #else
 178         #define D_TRX(dev, args...)     do {} while (0)
 179 #endif /* DEBUG_TRX */
 180
 181 #ifdef DEBUG_INIT
 182         #define D_INI(dev, args...)     dev_dbg(dev, ## args)
 183 #else
 184         #define D_INI(dev, args...)     do {} while (0)
 185 #endif /* DEBUG_INIT */
 186
 187 #ifdef DEBUG_EP0
 188         static const char *state_name[] = {
 189                 "EP0_IDLE",
 190                 "EP0_IN_DATA_PHASE",
 191                 "EP0_OUT_DATA_PHASE",
 192                 "EP0_CONFIG",
 193                 "EP0_STALL"
 194         };
 195         #define D_EP0(dev, args...)     dev_dbg(dev, ## args)
 196 #else
 197         #define D_EP0(dev, args...)     do {} while (0)
 198 #endif /* DEBUG_EP0 */
 199
 200 #ifdef DEBUG_EPX
 201         #define D_EPX(dev, args...)     dev_dbg(dev, ## args)
 202 #else
 203         #define D_EPX(dev, args...)     do {} while (0)
 204 #endif /* DEBUG_EP0 */
 205
 206 #ifdef DEBUG_IRQ
 207         static void dump_intr(const char *label, int irqreg, struct device *dev)
 208         {
 209                 dev_dbg(dev, "<%s> USB_INTR=[%s%s%s%s%s%s%s%s%s]\n", label,
 210                         (irqreg & INTR_WAKEUP) ? " wake" : "",
 211                         (irqreg & INTR_MSOF) ? " msof" : "",
 212                         (irqreg & INTR_SOF) ? " sof" : "",
 213                         (irqreg & INTR_RESUME) ? " resume" : "",
 214                         (irqreg & INTR_SUSPEND) ? " suspend" : "",
 215                         (irqreg & INTR_RESET_STOP) ? " noreset" : "",
 216                         (irqreg & INTR_RESET_START) ? " reset" : "",
 217                         (irqreg & INTR_FRAME_MATCH) ? " fmatch" : "",
 218                         (irqreg & INTR_CFG_CHG) ? " config" : "");
 219         }
 220 #else
 221         #define dump_intr(x, y, z)              do {} while (0)
 222 #endif /* DEBUG_IRQ */
 223
 224 #ifdef DEBUG_EPIRQ
 225         static void dump_ep_intr(const char *label, int nr, int irqreg,
 226                                                         struct device *dev)
 227         {
 228                 dev_dbg(dev, "<%s> EP%d_INTR=[%s%s%s%s%s%s%s%s%s]\n", label, nr,
 229                         (irqreg & EPINTR_FIFO_FULL) ? " full" : "",
 230                         (irqreg & EPINTR_FIFO_EMPTY) ? " fempty" : "",
 231                         (irqreg & EPINTR_FIFO_ERROR) ? " ferr" : "",
 232                         (irqreg & EPINTR_FIFO_HIGH) ? " fhigh" : "",
 233                         (irqreg & EPINTR_FIFO_LOW) ? " flow" : "",
 234                         (irqreg & EPINTR_MDEVREQ) ? " mreq" : "",
 235                         (irqreg & EPINTR_EOF) ? " eof" : "",
 236                         (irqreg & EPINTR_DEVREQ) ? " devreq" : "",
 237                         (irqreg & EPINTR_EOT) ? " eot" : "");
 238         }
 239 #else
 240         #define dump_ep_intr(x, y, z, i)        do {} while (0)
 241 #endif /* DEBUG_IRQ */
 242
 243 #ifdef DEBUG_DUMP
 244         static void dump_usb_stat(const char *label,
 245                                                 struct imx_udc_struct *imx_usb)
 246         {
 247                 int temp = __raw_readl(imx_usb->base + USB_STAT);
 248
 249                 dev_dbg(imx_usb->dev,
 250                         "<%s> USB_STAT=[%s%s CFG=%d, INTF=%d, ALTR=%d]\n", label,
 251                         (temp & STAT_RST) ? " reset" : "",
 252                         (temp & STAT_SUSP) ? " suspend" : "",
 253                         (temp & STAT_CFG) >> 5,
 254                         (temp & STAT_INTF) >> 3,
 255                         (temp & STAT_ALTSET));
 256         }
 257
 258         static void dump_ep_stat(const char *label,
 259                                                 struct imx_ep_struct *imx_ep)
 260         {
 261                 int temp = __raw_readl(imx_ep->imx_usb->base
 262                                                 + USB_EP_INTR(EP_NO(imx_ep)));
 263
 264                 dev_dbg(imx_ep->imx_usb->dev,
 265                         "<%s> EP%d_INTR=[%s%s%s%s%s%s%s%s%s]\n",
 266                         label, EP_NO(imx_ep),
 267                         (temp & EPINTR_FIFO_FULL) ? " full" : "",
 268                         (temp & EPINTR_FIFO_EMPTY) ? " fempty" : "",
 269                         (temp & EPINTR_FIFO_ERROR) ? " ferr" : "",
 270                         (temp & EPINTR_FIFO_HIGH) ? " fhigh" : "",
 271                         (temp & EPINTR_FIFO_LOW) ? " flow" : "",
 272                         (temp & EPINTR_MDEVREQ) ? " mreq" : "",
 273                         (temp & EPINTR_EOF) ? " eof" : "",
 274                         (temp & EPINTR_DEVREQ) ? " devreq" : "",
 275                         (temp & EPINTR_EOT) ? " eot" : "");
 276
 277                 temp = __raw_readl(imx_ep->imx_usb->base
 278                                                 + USB_EP_STAT(EP_NO(imx_ep)));
 279
 280                 dev_dbg(imx_ep->imx_usb->dev,
 281                         "<%s> EP%d_STAT=[%s%s bcount=%d]\n",
 282                         label, EP_NO(imx_ep),
 283                         (temp & EPSTAT_SIP) ? " sip" : "",
 284                         (temp & EPSTAT_STALL) ? " stall" : "",
 285                         (temp & EPSTAT_BCOUNT) >> 16);
 286
 287                 temp = __raw_readl(imx_ep->imx_usb->base
 288                                                 + USB_EP_FSTAT(EP_NO(imx_ep)));
 289
 290                 dev_dbg(imx_ep->imx_usb->dev,
 291                         "<%s> EP%d_FSTAT=[%s%s%s%s%s%s%s]\n",
 292                         label, EP_NO(imx_ep),
 293                         (temp & FSTAT_ERR) ? " ferr" : "",
 294                         (temp & FSTAT_UF) ? " funder" : "",
 295                         (temp & FSTAT_OF) ? " fover" : "",
 296                         (temp & FSTAT_FR) ? " fready" : "",
 297                         (temp & FSTAT_FULL) ? " ffull" : "",
 298                         (temp & FSTAT_ALRM) ? " falarm" : "",
 299                         (temp & FSTAT_EMPTY) ? " fempty" : "");
 300         }
 301
 302         static void dump_req(const char *label, struct imx_ep_struct *imx_ep,
 303                                                         struct usb_request *req)
 304         {
 305                 int i;
 306
 307                 if (!req || !req->buf) {
 308                         dev_dbg(imx_ep->imx_usb->dev,
 309                                         "<%s> req or req buf is free\n", label);
 310                         return;
 311                 }
 312
 313                 if ((!EP_NO(imx_ep) && imx_ep->imx_usb->ep0state
 314                         == EP0_IN_DATA_PHASE)
 315                         || (EP_NO(imx_ep) && EP_DIR(imx_ep))) {
 316
 317                         dev_dbg(imx_ep->imx_usb->dev,
 318                                                 "<%s> request dump <", label);
 319                         for (i = 0; i < req->length; i++)
 320                                 printk("%02x-", *((u8 *)req->buf + i));
 321                         printk(">\n");
 322                 }
 323         }
 324
 325 #else
 326         #define dump_ep_stat(x, y)              do {} while (0)
 327         #define dump_usb_stat(x, y)             do {} while (0)
 328         #define dump_req(x, y, z)               do {} while (0)
 329 #endif /* DEBUG_DUMP */
 330
 331 #ifdef DEBUG_ERR
 332         #define D_ERR(dev, args...)     dev_dbg(dev, ## args)
 333 #else
 334         #define D_ERR(dev, args...)     do {} while (0)
 335 #endif
 336
 337 #else
 338         #define D_REQ(dev, args...)             do {} while (0)
 339         #define D_TRX(dev, args...)             do {} while (0)
 340         #define D_INI(dev, args...)             do {} while (0)
 341         #define D_EP0(dev, args...)             do {} while (0)
 342         #define D_EPX(dev, args...)             do {} while (0)
 343         #define dump_ep_intr(x, y, z, i)        do {} while (0)
 344         #define dump_intr(x, y, z)              do {} while (0)
 345         #define dump_ep_stat(x, y)              do {} while (0)
 346         #define dump_usb_stat(x, y)             do {} while (0)
 347         #define dump_req(x, y, z)               do {} while (0)
 348         #define D_ERR(dev, args...)             do {} while (0)
 349 #endif /* DEBUG */
 350
 351 #endif /* __LINUX_USB_GADGET_IMX_H */