drivers/usb/gadget/pxa2xx_udc.h

   1 /*
   2  * linux/drivers/usb/gadget/pxa2xx_udc.h
   3  * Intel PXA2xx on-chip full speed USB device controller
   4  *
   5  * Copyright (C) 2003 Robert Schwebel <r.schwebel@pengutronix.de>, Pengutronix
   6  * Copyright (C) 2003 David Brownell
   7  *
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 2 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, write to the Free Software
  21  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  22  */
  23
  24 #ifndef __LINUX_USB_GADGET_PXA2XX_H
  25 #define __LINUX_USB_GADGET_PXA2XX_H
  26
  27 #include <linux/types.h>
  28
  29 /*-------------------------------------------------------------------------*/
  30
  31 /* pxa2xx has this (move to include/asm-arm/arch-pxa/pxa-regs.h) */
  32 #define UFNRH_SIR       (1 << 7)        /* SOF interrupt request */
  33 #define UFNRH_SIM       (1 << 6)        /* SOF interrupt mask */
  34 #define UFNRH_IPE14     (1 << 5)        /* ISO packet error, ep14 */
  35 #define UFNRH_IPE9      (1 << 4)        /* ISO packet error, ep9 */
  36 #define UFNRH_IPE4      (1 << 3)        /* ISO packet error, ep4 */
  37
  38 /* pxa255 has this (move to include/asm-arm/arch-pxa/pxa-regs.h) */
  39 #define UDCCFR          UDC_RES2        /* UDC Control Function Register */
  40 #define UDCCFR_AREN     (1 << 7)        /* ACK response enable (now) */
  41 #define UDCCFR_ACM      (1 << 2)        /* ACK control mode (wait for AREN) */
  42
  43 /* latest pxa255 errata define new "must be one" bits in UDCCFR */
  44 #define UDCCFR_MB1      (0xff & ~(UDCCFR_AREN|UDCCFR_ACM))
  45
  46 /*-------------------------------------------------------------------------*/
  47
  48 struct pxa2xx_udc;
  49
  50 struct pxa2xx_ep {
  51         struct usb_ep                           ep;
  52         struct pxa2xx_udc                       *dev;
  53
  54         const struct usb_endpoint_descriptor    *desc;
  55         struct list_head                        queue;
  56         unsigned long                           pio_irqs;
  57
  58         unsigned short                          fifo_size;
  59         u8                                      bEndpointAddress;
  60         u8                                      bmAttributes;
  61
  62         unsigned                                stopped : 1;
  63         unsigned                                dma_fixup : 1;
  64
  65         /* UDCCS = UDC Control/Status for this EP
  66          * UBCR = UDC Byte Count Remaining (contents of OUT fifo)
  67          * UDDR = UDC Endpoint Data Register (the fifo)
  68          * DRCM = DMA Request Channel Map
  69          */
  70         volatile u32                            *reg_udccs;
  71         volatile u32                            *reg_ubcr;
  72         volatile u32                            *reg_uddr;
  73 };
  74
  75 struct pxa2xx_request {
  76         struct usb_request                      req;
  77         struct list_head                        queue;
  78 };
  79
  80 enum ep0_state {
  81         EP0_IDLE,
  82         EP0_IN_DATA_PHASE,
  83         EP0_OUT_DATA_PHASE,
  84         EP0_END_XFER,
  85         EP0_STALL,
  86 };
  87
  88 #define EP0_FIFO_SIZE   ((unsigned)16)
  89 #define BULK_FIFO_SIZE  ((unsigned)64)
  90 #define ISO_FIFO_SIZE   ((unsigned)256)
  91 #define INT_FIFO_SIZE   ((unsigned)8)
  92
  93 struct udc_stats {
  94         struct ep0stats {
  95                 unsigned long           ops;
  96                 unsigned long           bytes;
  97         } read, write;
  98         unsigned long                   irqs;
  99 };
 100
 101 #ifdef CONFIG_USB_PXA2XX_SMALL
 102 /* when memory's tight, SMALL config saves code+data.  */
 103 #define PXA_UDC_NUM_ENDPOINTS   3
 104 #endif
 105
 106 #ifndef PXA_UDC_NUM_ENDPOINTS
 107 #define PXA_UDC_NUM_ENDPOINTS   16
 108 #endif
 109
 110 struct pxa2xx_udc {
 111         struct usb_gadget                       gadget;
 112         struct usb_gadget_driver                *driver;
 113
 114         enum ep0_state                          ep0state;
 115         struct udc_stats                        stats;
 116         unsigned                                got_irq : 1,
 117                                                 vbus : 1,
 118                                                 pullup : 1,
 119                                                 has_cfr : 1,
 120                                                 req_pending : 1,
 121                                                 req_std : 1,
 122                                                 req_config : 1;
 123
 124 #define start_watchdog(dev) mod_timer(&dev->timer, jiffies + (HZ/200))
 125         struct timer_list                       timer;
 126
 127         struct device                           *dev;
 128         struct clk                              *clk;
 129         struct pxa2xx_udc_mach_info             *mach;
 130         u64                                     dma_mask;
 131         struct pxa2xx_ep                        ep [PXA_UDC_NUM_ENDPOINTS];
 132 };
 133
 134 /*-------------------------------------------------------------------------*/
 135
 136 #ifdef CONFIG_ARCH_LUBBOCK
 137 #include <asm/arch/lubbock.h>
 138 /* lubbock can also report usb connect/disconnect irqs */
 139 #endif
 140
 141 static struct pxa2xx_udc *the_controller;
 142
 143 /*-------------------------------------------------------------------------*/
 144
 145 /*
 146  * Debugging support vanishes in non-debug builds.  DBG_NORMAL should be
 147  * mostly silent during normal use/testing, with no timing side-effects.
 148  */
 149 #define DBG_NORMAL      1       /* error paths, device state transitions */
 150 #define DBG_VERBOSE     2       /* add some success path trace info */
 151 #define DBG_NOISY       3       /* ... even more: request level */
 152 #define DBG_VERY_NOISY  4       /* ... even more: packet level */
 153
 154 #define DMSG(stuff...)  pr_debug("udc: " stuff)
 155
 156 #ifdef DEBUG
 157
 158 static const char *state_name[] = {
 159         "EP0_IDLE",
 160         "EP0_IN_DATA_PHASE", "EP0_OUT_DATA_PHASE",
 161         "EP0_END_XFER", "EP0_STALL"
 162 };
 163
 164 #ifdef VERBOSE
 165 #    define UDC_DEBUG DBG_VERBOSE
 166 #else
 167 #    define UDC_DEBUG DBG_NORMAL
 168 #endif
 169
 170 static void __maybe_unused
 171 dump_udccr(const char *label)
 172 {
 173         u32     udccr = UDCCR;
 174         DMSG("%s %02X =%s%s%s%s%s%s%s%s\n",
 175                 label, udccr,
 176                 (udccr & UDCCR_REM) ? " rem" : "",
 177                 (udccr & UDCCR_RSTIR) ? " rstir" : "",
 178                 (udccr & UDCCR_SRM) ? " srm" : "",
 179                 (udccr & UDCCR_SUSIR) ? " susir" : "",
 180                 (udccr & UDCCR_RESIR) ? " resir" : "",
 181                 (udccr & UDCCR_RSM) ? " rsm" : "",
 182                 (udccr & UDCCR_UDA) ? " uda" : "",
 183                 (udccr & UDCCR_UDE) ? " ude" : "");
 184 }
 185
 186 static void __maybe_unused
 187 dump_udccs0(const char *label)
 188 {
 189         u32             udccs0 = UDCCS0;
 190
 191         DMSG("%s %s %02X =%s%s%s%s%s%s%s%s\n",
 192                 label, state_name[the_controller->ep0state], udccs0,
 193                 (udccs0 & UDCCS0_SA) ? " sa" : "",
 194                 (udccs0 & UDCCS0_RNE) ? " rne" : "",
 195                 (udccs0 & UDCCS0_FST) ? " fst" : "",
 196                 (udccs0 & UDCCS0_SST) ? " sst" : "",
 197                 (udccs0 & UDCCS0_DRWF) ? " dwrf" : "",
 198                 (udccs0 & UDCCS0_FTF) ? " ftf" : "",
 199                 (udccs0 & UDCCS0_IPR) ? " ipr" : "",
 200                 (udccs0 & UDCCS0_OPR) ? " opr" : "");
 201 }
 202
 203 static void __maybe_unused
 204 dump_state(struct pxa2xx_udc *dev)
 205 {
 206         u32             tmp;
 207         unsigned        i;
 208
 209         DMSG("%s %s, uicr %02X.%02X, usir %02X.%02x, ufnr %02X.%02X\n",
 210                 is_usb_connected() ? "host " : "disconnected",
 211                 state_name[dev->ep0state],
 212                 UICR1, UICR0, USIR1, USIR0, UFNRH, UFNRL);
 213         dump_udccr("udccr");
 214         if (dev->has_cfr) {
 215                 tmp = UDCCFR;
 216                 DMSG("udccfr %02X =%s%s\n", tmp,
 217                         (tmp & UDCCFR_AREN) ? " aren" : "",
 218                         (tmp & UDCCFR_ACM) ? " acm" : "");
 219         }
 220
 221         if (!dev->driver) {
 222                 DMSG("no gadget driver bound\n");
 223                 return;
 224         } else
 225                 DMSG("ep0 driver '%s'\n", dev->driver->driver.name);
 226
 227         if (!is_usb_connected())
 228                 return;
 229
 230         dump_udccs0 ("udccs0");
 231         DMSG("ep0 IN %lu/%lu, OUT %lu/%lu\n",
 232                 dev->stats.write.bytes, dev->stats.write.ops,
 233                 dev->stats.read.bytes, dev->stats.read.ops);
 234
 235         for (i = 1; i < PXA_UDC_NUM_ENDPOINTS; i++) {
 236                 if (dev->ep [i].desc == 0)
 237                         continue;
 238                 DMSG ("udccs%d = %02x\n", i, *dev->ep->reg_udccs);
 239         }
 240 }
 241
 242 #else
 243
 244 #define dump_udccr(x)   do{}while(0)
 245 #define dump_udccs0(x)  do{}while(0)
 246 #define dump_state(x)   do{}while(0)
 247
 248 #define UDC_DEBUG ((unsigned)0)
 249
 250 #endif
 251
 252 #define DBG(lvl, stuff...) do{if ((lvl) <= UDC_DEBUG) DMSG(stuff);}while(0)
 253
 254 #define ERR(stuff...)           pr_err("udc: " stuff)
 255 #define WARN(stuff...)          pr_warning("udc: " stuff)
 256 #define INFO(stuff...)          pr_info("udc: " stuff)
 257
 258
 259 #endif /* __LINUX_USB_GADGET_PXA2XX_H */