drivers/usb/gadget/pxa25x_udc.h

   1 /*
   2  * Intel PXA25x on-chip full speed USB device controller
   3  *
   4  * Copyright (C) 2003 Robert Schwebel <r.schwebel@pengutronix.de>, Pengutronix
   5  * Copyright (C) 2003 David Brownell
   6  *
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2 of the License, or
  11  * (at your option) any later version.
  12  */
  13
  14 #ifndef __LINUX_USB_GADGET_PXA25X_H
  15 #define __LINUX_USB_GADGET_PXA25X_H
  16
  17 #include <linux/types.h>
  18
  19 /*-------------------------------------------------------------------------*/
  20
  21 /* pxa25x has this (move to include/asm-arm/arch-pxa/pxa-regs.h) */
  22 #define UFNRH_SIR       (1 << 7)        /* SOF interrupt request */
  23 #define UFNRH_SIM       (1 << 6)        /* SOF interrupt mask */
  24 #define UFNRH_IPE14     (1 << 5)        /* ISO packet error, ep14 */
  25 #define UFNRH_IPE9      (1 << 4)        /* ISO packet error, ep9 */
  26 #define UFNRH_IPE4      (1 << 3)        /* ISO packet error, ep4 */
  27
  28 /* pxa255 has this (move to include/asm-arm/arch-pxa/pxa-regs.h) */
  29 #define UDCCFR          UDC_RES2        /* UDC Control Function Register */
  30 #define UDCCFR_AREN     (1 << 7)        /* ACK response enable (now) */
  31 #define UDCCFR_ACM      (1 << 2)        /* ACK control mode (wait for AREN) */
  32
  33 /* latest pxa255 errata define new "must be one" bits in UDCCFR */
  34 #define UDCCFR_MB1      (0xff & ~(UDCCFR_AREN|UDCCFR_ACM))
  35
  36 /*-------------------------------------------------------------------------*/
  37
  38 struct pxa25x_udc;
  39
  40 struct pxa25x_ep {
  41         struct usb_ep                           ep;
  42         struct pxa25x_udc                       *dev;
  43
  44         struct list_head                        queue;
  45         unsigned long                           pio_irqs;
  46
  47         unsigned short                          fifo_size;
  48         u8                                      bEndpointAddress;
  49         u8                                      bmAttributes;
  50
  51         unsigned                                stopped : 1;
  52         unsigned                                dma_fixup : 1;
  53
  54         /* UDCCS = UDC Control/Status for this EP
  55          * UBCR = UDC Byte Count Remaining (contents of OUT fifo)
  56          * UDDR = UDC Endpoint Data Register (the fifo)
  57          * DRCM = DMA Request Channel Map
  58          */
  59         volatile u32                            *reg_udccs;
  60         volatile u32                            *reg_ubcr;
  61         volatile u32                            *reg_uddr;
  62 };
  63
  64 struct pxa25x_request {
  65         struct usb_request                      req;
  66         struct list_head                        queue;
  67 };
  68
  69 enum ep0_state {
  70         EP0_IDLE,
  71         EP0_IN_DATA_PHASE,
  72         EP0_OUT_DATA_PHASE,
  73         EP0_END_XFER,
  74         EP0_STALL,
  75 };
  76
  77 #define EP0_FIFO_SIZE   ((unsigned)16)
  78 #define BULK_FIFO_SIZE  ((unsigned)64)
  79 #define ISO_FIFO_SIZE   ((unsigned)256)
  80 #define INT_FIFO_SIZE   ((unsigned)8)
  81
  82 struct udc_stats {
  83         struct ep0stats {
  84                 unsigned long           ops;
  85                 unsigned long           bytes;
  86         } read, write;
  87         unsigned long                   irqs;
  88 };
  89
  90 #ifdef CONFIG_USB_PXA25X_SMALL
  91 /* when memory's tight, SMALL config saves code+data.  */
  92 #define PXA_UDC_NUM_ENDPOINTS   3
  93 #endif
  94
  95 #ifndef PXA_UDC_NUM_ENDPOINTS
  96 #define PXA_UDC_NUM_ENDPOINTS   16
  97 #endif
  98
  99 struct pxa25x_udc {
 100         struct usb_gadget                       gadget;
 101         struct usb_gadget_driver                *driver;
 102
 103         enum ep0_state                          ep0state;
 104         struct udc_stats                        stats;
 105         unsigned                                got_irq : 1,
 106                                                 vbus : 1,
 107                                                 pullup : 1,
 108                                                 has_cfr : 1,
 109                                                 req_pending : 1,
 110                                                 req_std : 1,
 111                                                 req_config : 1,
 112                                                 suspended : 1,
 113                                                 active : 1;
 114
 115 #define start_watchdog(dev) mod_timer(&dev->timer, jiffies + (HZ/200))
 116         struct timer_list                       timer;
 117
 118         struct device                           *dev;
 119         struct clk                              *clk;
 120         struct pxa2xx_udc_mach_info             *mach;
 121         struct usb_phy                          *transceiver;
 122         u64                                     dma_mask;
 123         struct pxa25x_ep                        ep [PXA_UDC_NUM_ENDPOINTS];
 124
 125 #ifdef CONFIG_USB_GADGET_DEBUG_FS
 126         struct dentry                           *debugfs_udc;
 127 #endif
 128 };
 129
 130 /*-------------------------------------------------------------------------*/
 131
 132 #ifdef CONFIG_ARCH_LUBBOCK
 133 #include <mach/lubbock.h>
 134 /* lubbock can also report usb connect/disconnect irqs */
 135 #endif
 136
 137 static struct pxa25x_udc *the_controller;
 138
 139 /*-------------------------------------------------------------------------*/
 140
 141 /*
 142  * Debugging support vanishes in non-debug builds.  DBG_NORMAL should be
 143  * mostly silent during normal use/testing, with no timing side-effects.
 144  */
 145 #define DBG_NORMAL      1       /* error paths, device state transitions */
 146 #define DBG_VERBOSE     2       /* add some success path trace info */
 147 #define DBG_NOISY       3       /* ... even more: request level */
 148 #define DBG_VERY_NOISY  4       /* ... even more: packet level */
 149
 150 #define DMSG(stuff...)  pr_debug("udc: " stuff)
 151
 152 #ifdef DEBUG
 153
 154 static const char *state_name[] = {
 155         "EP0_IDLE",
 156         "EP0_IN_DATA_PHASE", "EP0_OUT_DATA_PHASE",
 157         "EP0_END_XFER", "EP0_STALL"
 158 };
 159
 160 #ifdef VERBOSE_DEBUG
 161 #    define UDC_DEBUG DBG_VERBOSE
 162 #else
 163 #    define UDC_DEBUG DBG_NORMAL
 164 #endif
 165
 166 static void __maybe_unused
 167 dump_udccr(const char *label)
 168 {
 169         u32     udccr = UDCCR;
 170         DMSG("%s %02X =%s%s%s%s%s%s%s%s\n",
 171                 label, udccr,
 172                 (udccr & UDCCR_REM) ? " rem" : "",
 173                 (udccr & UDCCR_RSTIR) ? " rstir" : "",
 174                 (udccr & UDCCR_SRM) ? " srm" : "",
 175                 (udccr & UDCCR_SUSIR) ? " susir" : "",
 176                 (udccr & UDCCR_RESIR) ? " resir" : "",
 177                 (udccr & UDCCR_RSM) ? " rsm" : "",
 178                 (udccr & UDCCR_UDA) ? " uda" : "",
 179                 (udccr & UDCCR_UDE) ? " ude" : "");
 180 }
 181
 182 static void __maybe_unused
 183 dump_udccs0(const char *label)
 184 {
 185         u32             udccs0 = UDCCS0;
 186
 187         DMSG("%s %s %02X =%s%s%s%s%s%s%s%s\n",
 188                 label, state_name[the_controller->ep0state], udccs0,
 189                 (udccs0 & UDCCS0_SA) ? " sa" : "",
 190                 (udccs0 & UDCCS0_RNE) ? " rne" : "",
 191                 (udccs0 & UDCCS0_FST) ? " fst" : "",
 192                 (udccs0 & UDCCS0_SST) ? " sst" : "",
 193                 (udccs0 & UDCCS0_DRWF) ? " dwrf" : "",
 194                 (udccs0 & UDCCS0_FTF) ? " ftf" : "",
 195                 (udccs0 & UDCCS0_IPR) ? " ipr" : "",
 196                 (udccs0 & UDCCS0_OPR) ? " opr" : "");
 197 }
 198
 199 static void __maybe_unused
 200 dump_state(struct pxa25x_udc *dev)
 201 {
 202         u32             tmp;
 203         unsigned        i;
 204
 205         DMSG("%s, uicr %02X.%02X, usir %02X.%02x, ufnr %02X.%02X\n",
 206                 state_name[dev->ep0state],
 207                 UICR1, UICR0, USIR1, USIR0, UFNRH, UFNRL);
 208         dump_udccr("udccr");
 209         if (dev->has_cfr) {
 210                 tmp = UDCCFR;
 211                 DMSG("udccfr %02X =%s%s\n", tmp,
 212                         (tmp & UDCCFR_AREN) ? " aren" : "",
 213                         (tmp & UDCCFR_ACM) ? " acm" : "");
 214         }
 215
 216         if (!dev->driver) {
 217                 DMSG("no gadget driver bound\n");
 218                 return;
 219         } else
 220                 DMSG("ep0 driver '%s'\n", dev->driver->driver.name);
 221
 222         dump_udccs0 ("udccs0");
 223         DMSG("ep0 IN %lu/%lu, OUT %lu/%lu\n",
 224                 dev->stats.write.bytes, dev->stats.write.ops,
 225                 dev->stats.read.bytes, dev->stats.read.ops);
 226
 227         for (i = 1; i < PXA_UDC_NUM_ENDPOINTS; i++) {
 228                 if (dev->ep [i].desc == NULL)
 229                         continue;
 230                 DMSG ("udccs%d = %02x\n", i, *dev->ep->reg_udccs);
 231         }
 232 }
 233
 234 #else
 235
 236 #define dump_udccr(x)   do{}while(0)
 237 #define dump_udccs0(x)  do{}while(0)
 238 #define dump_state(x)   do{}while(0)
 239
 240 #define UDC_DEBUG ((unsigned)0)
 241
 242 #endif
 243
 244 #define DBG(lvl, stuff...) do{if ((lvl) <= UDC_DEBUG) DMSG(stuff);}while(0)
 245
 246 #define ERR(stuff...)           pr_err("udc: " stuff)
 247 #define WARNING(stuff...)       pr_warning("udc: " stuff)
 248 #define INFO(stuff...)          pr_info("udc: " stuff)
 249
 250
 251 #endif /* __LINUX_USB_GADGET_PXA25X_H */