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         const struct usb_endpoint_descriptor    *desc;
  45         struct list_head                        queue;
  46         unsigned long                           pio_irqs;
  47
  48         unsigned short                          fifo_size;
  49         u8                                      bEndpointAddress;
  50         u8                                      bmAttributes;
  51
  52         unsigned                                stopped : 1;
  53         unsigned                                dma_fixup : 1;
  54
  55         /* UDCCS = UDC Control/Status for this EP
  56          * UBCR = UDC Byte Count Remaining (contents of OUT fifo)
  57          * UDDR = UDC Endpoint Data Register (the fifo)
  58          * DRCM = DMA Request Channel Map
  59          */
  60         volatile u32                            *reg_udccs;
  61         volatile u32                            *reg_ubcr;
  62         volatile u32                            *reg_uddr;
  63 };
  64
  65 struct pxa25x_request {
  66         struct usb_request                      req;
  67         struct list_head                        queue;
  68 };
  69
  70 enum ep0_state {
  71         EP0_IDLE,
  72         EP0_IN_DATA_PHASE,
  73         EP0_OUT_DATA_PHASE,
  74         EP0_END_XFER,
  75         EP0_STALL,
  76 };
  77
  78 #define EP0_FIFO_SIZE   ((unsigned)16)
  79 #define BULK_FIFO_SIZE  ((unsigned)64)
  80 #define ISO_FIFO_SIZE   ((unsigned)256)
  81 #define INT_FIFO_SIZE   ((unsigned)8)
  82
  83 struct udc_stats {
  84         struct ep0stats {
  85                 unsigned long           ops;
  86                 unsigned long           bytes;
  87         } read, write;
  88         unsigned long                   irqs;
  89 };
  90
  91 #ifdef CONFIG_USB_PXA25X_SMALL
  92 /* when memory's tight, SMALL config saves code+data.  */
  93 #define PXA_UDC_NUM_ENDPOINTS   3
  94 #endif
  95
  96 #ifndef PXA_UDC_NUM_ENDPOINTS
  97 #define PXA_UDC_NUM_ENDPOINTS   16
  98 #endif
  99
 100 struct pxa25x_udc {
 101         struct usb_gadget                       gadget;
 102         struct usb_gadget_driver                *driver;
 103
 104         enum ep0_state                          ep0state;
 105         struct udc_stats                        stats;
 106         unsigned                                got_irq : 1,
 107                                                 vbus : 1,
 108                                                 pullup : 1,
 109                                                 has_cfr : 1,
 110                                                 req_pending : 1,
 111                                                 req_std : 1,
 112                                                 req_config : 1,
 113                                                 suspended : 1,
 114                                                 active : 1;
 115
 116 #define start_watchdog(dev) mod_timer(&dev->timer, jiffies + (HZ/200))
 117         struct timer_list                       timer;
 118
 119         struct device                           *dev;
 120         struct clk                              *clk;
 121         struct pxa2xx_udc_mach_info             *mach;
 122         struct otg_transceiver                  *transceiver;
 123         u64                                     dma_mask;
 124         struct pxa25x_ep                        ep [PXA_UDC_NUM_ENDPOINTS];
 125
 126 #ifdef CONFIG_USB_GADGET_DEBUG_FS
 127         struct dentry                           *debugfs_udc;
 128 #endif
 129 };
 130
 131 /*-------------------------------------------------------------------------*/
 132
 133 #ifdef CONFIG_ARCH_LUBBOCK
 134 #include <mach/lubbock.h>
 135 /* lubbock can also report usb connect/disconnect irqs */
 136 #endif
 137
 138 static struct pxa25x_udc *the_controller;
 139
 140 /*-------------------------------------------------------------------------*/
 141
 142 /*
 143  * Debugging support vanishes in non-debug builds.  DBG_NORMAL should be
 144  * mostly silent during normal use/testing, with no timing side-effects.
 145  */
 146 #define DBG_NORMAL      1       /* error paths, device state transitions */
 147 #define DBG_VERBOSE     2       /* add some success path trace info */
 148 #define DBG_NOISY       3       /* ... even more: request level */
 149 #define DBG_VERY_NOISY  4       /* ... even more: packet level */
 150
 151 #define DMSG(stuff...)  pr_debug("udc: " stuff)
 152
 153 #ifdef DEBUG
 154
 155 static const char *state_name[] = {
 156         "EP0_IDLE",
 157         "EP0_IN_DATA_PHASE", "EP0_OUT_DATA_PHASE",
 158         "EP0_END_XFER", "EP0_STALL"
 159 };
 160
 161 #ifdef VERBOSE_DEBUG
 162 #    define UDC_DEBUG DBG_VERBOSE
 163 #else
 164 #    define UDC_DEBUG DBG_NORMAL
 165 #endif
 166
 167 static void __maybe_unused
 168 dump_udccr(const char *label)
 169 {
 170         u32     udccr = UDCCR;
 171         DMSG("%s %02X =%s%s%s%s%s%s%s%s\n",
 172                 label, udccr,
 173                 (udccr & UDCCR_REM) ? " rem" : "",
 174                 (udccr & UDCCR_RSTIR) ? " rstir" : "",
 175                 (udccr & UDCCR_SRM) ? " srm" : "",
 176                 (udccr & UDCCR_SUSIR) ? " susir" : "",
 177                 (udccr & UDCCR_RESIR) ? " resir" : "",
 178                 (udccr & UDCCR_RSM) ? " rsm" : "",
 179                 (udccr & UDCCR_UDA) ? " uda" : "",
 180                 (udccr & UDCCR_UDE) ? " ude" : "");
 181 }
 182
 183 static void __maybe_unused
 184 dump_udccs0(const char *label)
 185 {
 186         u32             udccs0 = UDCCS0;
 187
 188         DMSG("%s %s %02X =%s%s%s%s%s%s%s%s\n",
 189                 label, state_name[the_controller->ep0state], udccs0,
 190                 (udccs0 & UDCCS0_SA) ? " sa" : "",
 191                 (udccs0 & UDCCS0_RNE) ? " rne" : "",
 192                 (udccs0 & UDCCS0_FST) ? " fst" : "",
 193                 (udccs0 & UDCCS0_SST) ? " sst" : "",
 194                 (udccs0 & UDCCS0_DRWF) ? " dwrf" : "",
 195                 (udccs0 & UDCCS0_FTF) ? " ftf" : "",
 196                 (udccs0 & UDCCS0_IPR) ? " ipr" : "",
 197                 (udccs0 & UDCCS0_OPR) ? " opr" : "");
 198 }
 199
 200 static void __maybe_unused
 201 dump_state(struct pxa25x_udc *dev)
 202 {
 203         u32             tmp;
 204         unsigned        i;
 205
 206         DMSG("%s, uicr %02X.%02X, usir %02X.%02x, ufnr %02X.%02X\n",
 207                 state_name[dev->ep0state],
 208                 UICR1, UICR0, USIR1, USIR0, UFNRH, UFNRL);
 209         dump_udccr("udccr");
 210         if (dev->has_cfr) {
 211                 tmp = UDCCFR;
 212                 DMSG("udccfr %02X =%s%s\n", tmp,
 213                         (tmp & UDCCFR_AREN) ? " aren" : "",
 214                         (tmp & UDCCFR_ACM) ? " acm" : "");
 215         }
 216
 217         if (!dev->driver) {
 218                 DMSG("no gadget driver bound\n");
 219                 return;
 220         } else
 221                 DMSG("ep0 driver '%s'\n", dev->driver->driver.name);
 222
 223         dump_udccs0 ("udccs0");
 224         DMSG("ep0 IN %lu/%lu, OUT %lu/%lu\n",
 225                 dev->stats.write.bytes, dev->stats.write.ops,
 226                 dev->stats.read.bytes, dev->stats.read.ops);
 227
 228         for (i = 1; i < PXA_UDC_NUM_ENDPOINTS; i++) {
 229                 if (dev->ep [i].desc == NULL)
 230                         continue;
 231                 DMSG ("udccs%d = %02x\n", i, *dev->ep->reg_udccs);
 232         }
 233 }
 234
 235 #else
 236
 237 #define dump_udccr(x)   do{}while(0)
 238 #define dump_udccs0(x)  do{}while(0)
 239 #define dump_state(x)   do{}while(0)
 240
 241 #define UDC_DEBUG ((unsigned)0)
 242
 243 #endif
 244
 245 #define DBG(lvl, stuff...) do{if ((lvl) <= UDC_DEBUG) DMSG(stuff);}while(0)
 246
 247 #define ERR(stuff...)           pr_err("udc: " stuff)
 248 #define WARNING(stuff...)       pr_warning("udc: " stuff)
 249 #define INFO(stuff...)          pr_info("udc: " stuff)
 250
 251
 252 #endif /* __LINUX_USB_GADGET_PXA25X_H */