drivers/ieee1394/ohci1394.h

   1 /*
   2  * ohci1394.h - driver for OHCI 1394 boards
   3  * Copyright (C)1999,2000 Sebastien Rougeaux <sebastien.rougeaux@anu.edu.au>
   4  *                        Gord Peters <GordPeters@smarttech.com>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software Foundation,
  18  * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  19  */
  20
  21 #ifndef _OHCI1394_H
  22 #define _OHCI1394_H
  23
  24 #include "ieee1394_types.h"
  25 #include <asm/io.h>
  26
  27 #define OHCI1394_DRIVER_NAME      "ohci1394"
  28
  29 #define OHCI1394_MAX_AT_REQ_RETRIES     0x2
  30 #define OHCI1394_MAX_AT_RESP_RETRIES    0x2
  31 #define OHCI1394_MAX_PHYS_RESP_RETRIES  0x8
  32 #define OHCI1394_MAX_SELF_ID_ERRORS     16
  33
  34 #define AR_REQ_NUM_DESC         4               /* number of AR req descriptors */
  35 #define AR_REQ_BUF_SIZE         PAGE_SIZE       /* size of AR req buffers */
  36 #define AR_REQ_SPLIT_BUF_SIZE   PAGE_SIZE       /* split packet buffer */
  37
  38 #define AR_RESP_NUM_DESC        4               /* number of AR resp descriptors */
  39 #define AR_RESP_BUF_SIZE        PAGE_SIZE       /* size of AR resp buffers */
  40 #define AR_RESP_SPLIT_BUF_SIZE  PAGE_SIZE       /* split packet buffer */
  41
  42 #define IR_NUM_DESC             16              /* number of IR descriptors */
  43 #define IR_BUF_SIZE             PAGE_SIZE       /* 4096 bytes/buffer */
  44 #define IR_SPLIT_BUF_SIZE       PAGE_SIZE       /* split packet buffer */
  45
  46 #define IT_NUM_DESC             16      /* number of IT descriptors */
  47
  48 #define AT_REQ_NUM_DESC         32      /* number of AT req descriptors */
  49 #define AT_RESP_NUM_DESC        32      /* number of AT resp descriptors */
  50
  51 #define OHCI_LOOP_COUNT         100     /* Number of loops for reg read waits */
  52
  53 #define OHCI_CONFIG_ROM_LEN     1024    /* Length of the mapped configrom space */
  54
  55 #define OHCI1394_SI_DMA_BUF_SIZE        8192 /* length of the selfid buffer */
  56
  57 /* PCI configuration space addresses */
  58 #define OHCI1394_PCI_HCI_Control 0x40
  59
  60 struct dma_cmd {
  61         u32 control;
  62         u32 address;
  63         u32 branchAddress;
  64         u32 status;
  65 };
  66
  67 /*
  68  * FIXME:
  69  * It is important that a single at_dma_prg does not cross a page boundary
  70  * The proper way to do it would be to do the check dynamically as the
  71  * programs are inserted into the AT fifo.
  72  */
  73 struct at_dma_prg {
  74         struct dma_cmd begin;
  75         quadlet_t data[4];
  76         struct dma_cmd end;
  77         quadlet_t pad[4]; /* FIXME: quick hack for memory alignment */
  78 };
  79
  80 /* identify whether a DMA context is asynchronous or isochronous */
  81 enum context_type { DMA_CTX_ASYNC_REQ, DMA_CTX_ASYNC_RESP, DMA_CTX_ISO };
  82
  83 /* DMA receive context */
  84 struct dma_rcv_ctx {
  85         struct ti_ohci *ohci;
  86         enum context_type type;
  87         int ctx;
  88         unsigned int num_desc;
  89
  90         unsigned int buf_size;
  91         unsigned int split_buf_size;
  92
  93         /* dma block descriptors */
  94         struct dma_cmd **prg_cpu;
  95         dma_addr_t *prg_bus;
  96         struct pci_pool *prg_pool;
  97
  98         /* dma buffers */
  99         quadlet_t **buf_cpu;
 100         dma_addr_t *buf_bus;
 101
 102         unsigned int buf_ind;
 103         unsigned int buf_offset;
 104         quadlet_t *spb;
 105         spinlock_t lock;
 106         struct tasklet_struct task;
 107         int ctrlClear;
 108         int ctrlSet;
 109         int cmdPtr;
 110         int ctxtMatch;
 111 };
 112
 113 /* DMA transmit context */
 114 struct dma_trm_ctx {
 115         struct ti_ohci *ohci;
 116         enum context_type type;
 117         int ctx;
 118         unsigned int num_desc;
 119
 120         /* dma block descriptors */
 121         struct at_dma_prg **prg_cpu;
 122         dma_addr_t *prg_bus;
 123         struct pci_pool *prg_pool;
 124
 125         unsigned int prg_ind;
 126         unsigned int sent_ind;
 127         int free_prgs;
 128         quadlet_t *branchAddrPtr;
 129
 130         /* list of packets inserted in the AT FIFO */
 131         struct list_head fifo_list;
 132
 133         /* list of pending packets to be inserted in the AT FIFO */
 134         struct list_head pending_list;
 135
 136         spinlock_t lock;
 137         struct tasklet_struct task;
 138         int ctrlClear;
 139         int ctrlSet;
 140         int cmdPtr;
 141 };
 142
 143 struct ohci1394_iso_tasklet {
 144         struct tasklet_struct tasklet;
 145         struct list_head link;
 146         int context;
 147         enum { OHCI_ISO_TRANSMIT, OHCI_ISO_RECEIVE,
 148                OHCI_ISO_MULTICHANNEL_RECEIVE } type;
 149 };
 150
 151 struct ti_ohci {
 152         struct pci_dev *dev;
 153
 154         enum {
 155                 OHCI_INIT_ALLOC_HOST,
 156                 OHCI_INIT_HAVE_MEM_REGION,
 157                 OHCI_INIT_HAVE_IOMAPPING,
 158                 OHCI_INIT_HAVE_CONFIG_ROM_BUFFER,
 159                 OHCI_INIT_HAVE_SELFID_BUFFER,
 160                 OHCI_INIT_HAVE_TXRX_BUFFERS__MAYBE,
 161                 OHCI_INIT_HAVE_IRQ,
 162                 OHCI_INIT_DONE,
 163         } init_state;
 164
 165         /* remapped memory spaces */
 166         void __iomem *registers;
 167
 168         /* dma buffer for self-id packets */
 169         quadlet_t *selfid_buf_cpu;
 170         dma_addr_t selfid_buf_bus;
 171
 172         /* buffer for csr config rom */
 173         quadlet_t *csr_config_rom_cpu;
 174         dma_addr_t csr_config_rom_bus;
 175         int csr_config_rom_length;
 176
 177         unsigned int max_packet_size;
 178
 179         /* async receive */
 180         struct dma_rcv_ctx ar_resp_context;
 181         struct dma_rcv_ctx ar_req_context;
 182
 183         /* async transmit */
 184         struct dma_trm_ctx at_resp_context;
 185         struct dma_trm_ctx at_req_context;
 186
 187         /* iso receive */
 188         int nb_iso_rcv_ctx;
 189         unsigned long ir_ctx_usage; /* use test_and_set_bit() for atomicity */
 190         unsigned long ir_multichannel_used; /* ditto */
 191         spinlock_t IR_channel_lock;
 192
 193         /* iso receive (legacy API) */
 194         u64 ir_legacy_channels; /* note: this differs from ISO_channel_usage;
 195                                    it only accounts for channels listened to
 196                                    by the legacy API, so that we can know when
 197                                    it is safe to free the legacy API context */
 198
 199         struct dma_rcv_ctx ir_legacy_context;
 200         struct ohci1394_iso_tasklet ir_legacy_tasklet;
 201
 202         /* iso transmit */
 203         int nb_iso_xmit_ctx;
 204         unsigned long it_ctx_usage; /* use test_and_set_bit() for atomicity */
 205
 206         /* iso transmit (legacy API) */
 207         struct dma_trm_ctx it_legacy_context;
 208         struct ohci1394_iso_tasklet it_legacy_tasklet;
 209
 210         u64 ISO_channel_usage;
 211
 212         /* IEEE-1394 part follows */
 213         struct hpsb_host *host;
 214
 215         int phyid, isroot;
 216
 217         spinlock_t phy_reg_lock;
 218         spinlock_t event_lock;
 219
 220         int self_id_errors;
 221
 222         /* Tasklets for iso receive and transmit, used by video1394,
 223          * amdtp and dv1394 */
 224
 225         struct list_head iso_tasklet_list;
 226         spinlock_t iso_tasklet_list_lock;
 227
 228         /* Swap the selfid buffer? */
 229         unsigned int selfid_swap:1;
 230         /* Some Apple chipset seem to swap incoming headers for us */
 231         unsigned int no_swap_incoming:1;
 232
 233         /* Force extra paranoia checking on bus-reset handling */
 234         unsigned int check_busreset:1;
 235 };
 236
 237 static inline int cross_bound(unsigned long addr, unsigned int size)
 238 {
 239         if (size > PAGE_SIZE)
 240                 return 1;
 241
 242         if (addr >> PAGE_SHIFT != (addr + size - 1) >> PAGE_SHIFT)
 243                 return 1;
 244
 245         return 0;
 246 }
 247
 248 /*
 249  * Register read and write helper functions.
 250  */
 251 static inline void reg_write(const struct ti_ohci *ohci, int offset, u32 data)
 252 {
 253         writel(data, ohci->registers + offset);
 254 }
 255
 256 static inline u32 reg_read(const struct ti_ohci *ohci, int offset)
 257 {
 258         return readl(ohci->registers + offset);
 259 }
 260
 261
 262 /* 2 KiloBytes of register space */
 263 #define OHCI1394_REGISTER_SIZE                0x800
 264
 265 /* Offsets relative to context bases defined below */
 266
 267 #define OHCI1394_ContextControlSet            0x000
 268 #define OHCI1394_ContextControlClear          0x004
 269 #define OHCI1394_ContextCommandPtr            0x00C
 270
 271 /* register map */
 272 #define OHCI1394_Version                      0x000
 273 #define OHCI1394_GUID_ROM                     0x004
 274 #define OHCI1394_ATRetries                    0x008
 275 #define OHCI1394_CSRData                      0x00C
 276 #define OHCI1394_CSRCompareData               0x010
 277 #define OHCI1394_CSRControl                   0x014
 278 #define OHCI1394_ConfigROMhdr                 0x018
 279 #define OHCI1394_BusID                        0x01C
 280 #define OHCI1394_BusOptions                   0x020
 281 #define OHCI1394_GUIDHi                       0x024
 282 #define OHCI1394_GUIDLo                       0x028
 283 #define OHCI1394_ConfigROMmap                 0x034
 284 #define OHCI1394_PostedWriteAddressLo         0x038
 285 #define OHCI1394_PostedWriteAddressHi         0x03C
 286 #define OHCI1394_VendorID                     0x040
 287 #define OHCI1394_HCControlSet                 0x050
 288 #define OHCI1394_HCControlClear               0x054
 289 #define  OHCI1394_HCControl_noByteSwap          0x40000000
 290 #define  OHCI1394_HCControl_programPhyEnable    0x00800000
 291 #define  OHCI1394_HCControl_aPhyEnhanceEnable   0x00400000
 292 #define  OHCI1394_HCControl_LPS                 0x00080000
 293 #define  OHCI1394_HCControl_postedWriteEnable   0x00040000
 294 #define  OHCI1394_HCControl_linkEnable          0x00020000
 295 #define  OHCI1394_HCControl_softReset           0x00010000
 296 #define OHCI1394_SelfIDBuffer                 0x064
 297 #define OHCI1394_SelfIDCount                  0x068
 298 #define OHCI1394_IRMultiChanMaskHiSet         0x070
 299 #define OHCI1394_IRMultiChanMaskHiClear       0x074
 300 #define OHCI1394_IRMultiChanMaskLoSet         0x078
 301 #define OHCI1394_IRMultiChanMaskLoClear       0x07C
 302 #define OHCI1394_IntEventSet                  0x080
 303 #define OHCI1394_IntEventClear                0x084
 304 #define OHCI1394_IntMaskSet                   0x088
 305 #define OHCI1394_IntMaskClear                 0x08C
 306 #define OHCI1394_IsoXmitIntEventSet           0x090
 307 #define OHCI1394_IsoXmitIntEventClear         0x094
 308 #define OHCI1394_IsoXmitIntMaskSet            0x098
 309 #define OHCI1394_IsoXmitIntMaskClear          0x09C
 310 #define OHCI1394_IsoRecvIntEventSet           0x0A0
 311 #define OHCI1394_IsoRecvIntEventClear         0x0A4
 312 #define OHCI1394_IsoRecvIntMaskSet            0x0A8
 313 #define OHCI1394_IsoRecvIntMaskClear          0x0AC
 314 #define OHCI1394_InitialBandwidthAvailable    0x0B0
 315 #define OHCI1394_InitialChannelsAvailableHi   0x0B4
 316 #define OHCI1394_InitialChannelsAvailableLo   0x0B8
 317 #define OHCI1394_FairnessControl              0x0DC
 318 #define OHCI1394_LinkControlSet               0x0E0
 319 #define OHCI1394_LinkControlClear             0x0E4
 320 #define  OHCI1394_LinkControl_RcvSelfID         0x00000200
 321 #define  OHCI1394_LinkControl_RcvPhyPkt         0x00000400
 322 #define  OHCI1394_LinkControl_CycleTimerEnable  0x00100000
 323 #define  OHCI1394_LinkControl_CycleMaster       0x00200000
 324 #define  OHCI1394_LinkControl_CycleSource       0x00400000
 325 #define OHCI1394_NodeID                       0x0E8
 326 #define OHCI1394_PhyControl                   0x0EC
 327 #define OHCI1394_IsochronousCycleTimer        0x0F0
 328 #define OHCI1394_AsReqFilterHiSet             0x100
 329 #define OHCI1394_AsReqFilterHiClear           0x104
 330 #define OHCI1394_AsReqFilterLoSet             0x108
 331 #define OHCI1394_AsReqFilterLoClear           0x10C
 332 #define OHCI1394_PhyReqFilterHiSet            0x110
 333 #define OHCI1394_PhyReqFilterHiClear          0x114
 334 #define OHCI1394_PhyReqFilterLoSet            0x118
 335 #define OHCI1394_PhyReqFilterLoClear          0x11C
 336 #define OHCI1394_PhyUpperBound                0x120
 337
 338 #define OHCI1394_AsReqTrContextBase           0x180
 339 #define OHCI1394_AsReqTrContextControlSet     0x180
 340 #define OHCI1394_AsReqTrContextControlClear   0x184
 341 #define OHCI1394_AsReqTrCommandPtr            0x18C
 342
 343 #define OHCI1394_AsRspTrContextBase           0x1A0
 344 #define OHCI1394_AsRspTrContextControlSet     0x1A0
 345 #define OHCI1394_AsRspTrContextControlClear   0x1A4
 346 #define OHCI1394_AsRspTrCommandPtr            0x1AC
 347
 348 #define OHCI1394_AsReqRcvContextBase          0x1C0
 349 #define OHCI1394_AsReqRcvContextControlSet    0x1C0
 350 #define OHCI1394_AsReqRcvContextControlClear  0x1C4
 351 #define OHCI1394_AsReqRcvCommandPtr           0x1CC
 352
 353 #define OHCI1394_AsRspRcvContextBase          0x1E0
 354 #define OHCI1394_AsRspRcvContextControlSet    0x1E0
 355 #define OHCI1394_AsRspRcvContextControlClear  0x1E4
 356 #define OHCI1394_AsRspRcvCommandPtr           0x1EC
 357
 358 /* Isochronous transmit registers */
 359 /* Add (16 * n) for context n */
 360 #define OHCI1394_IsoXmitContextBase           0x200
 361 #define OHCI1394_IsoXmitContextControlSet     0x200
 362 #define OHCI1394_IsoXmitContextControlClear   0x204
 363 #define OHCI1394_IsoXmitCommandPtr            0x20C
 364
 365 /* Isochronous receive registers */
 366 /* Add (32 * n) for context n */
 367 #define OHCI1394_IsoRcvContextBase            0x400
 368 #define OHCI1394_IsoRcvContextControlSet      0x400
 369 #define OHCI1394_IsoRcvContextControlClear    0x404
 370 #define OHCI1394_IsoRcvCommandPtr             0x40C
 371 #define OHCI1394_IsoRcvContextMatch           0x410
 372
 373 /* Interrupts Mask/Events */
 374
 375 #define OHCI1394_reqTxComplete           0x00000001
 376 #define OHCI1394_respTxComplete          0x00000002
 377 #define OHCI1394_ARRQ                    0x00000004
 378 #define OHCI1394_ARRS                    0x00000008
 379 #define OHCI1394_RQPkt                   0x00000010
 380 #define OHCI1394_RSPkt                   0x00000020
 381 #define OHCI1394_isochTx                 0x00000040
 382 #define OHCI1394_isochRx                 0x00000080
 383 #define OHCI1394_postedWriteErr          0x00000100
 384 #define OHCI1394_lockRespErr             0x00000200
 385 #define OHCI1394_selfIDComplete          0x00010000
 386 #define OHCI1394_busReset                0x00020000
 387 #define OHCI1394_phy                     0x00080000
 388 #define OHCI1394_cycleSynch              0x00100000
 389 #define OHCI1394_cycle64Seconds          0x00200000
 390 #define OHCI1394_cycleLost               0x00400000
 391 #define OHCI1394_cycleInconsistent       0x00800000
 392 #define OHCI1394_unrecoverableError      0x01000000
 393 #define OHCI1394_cycleTooLong            0x02000000
 394 #define OHCI1394_phyRegRcvd              0x04000000
 395 #define OHCI1394_masterIntEnable         0x80000000
 396
 397 /* DMA Control flags */
 398 #define DMA_CTL_OUTPUT_MORE              0x00000000
 399 #define DMA_CTL_OUTPUT_LAST              0x10000000
 400 #define DMA_CTL_INPUT_MORE               0x20000000
 401 #define DMA_CTL_INPUT_LAST               0x30000000
 402 #define DMA_CTL_UPDATE                   0x08000000
 403 #define DMA_CTL_IMMEDIATE                0x02000000
 404 #define DMA_CTL_IRQ                      0x00300000
 405 #define DMA_CTL_BRANCH                   0x000c0000
 406 #define DMA_CTL_WAIT                     0x00030000
 407
 408 /* OHCI evt_* error types, table 3-2 of the OHCI 1.1 spec. */
 409 #define EVT_NO_STATUS           0x0     /* No event status */
 410 #define EVT_RESERVED_A          0x1     /* Reserved, not used !!! */
 411 #define EVT_LONG_PACKET         0x2     /* The revc data was longer than the buf */
 412 #define EVT_MISSING_ACK         0x3     /* A subaction gap was detected before an ack
 413                                            arrived, or recv'd ack had a parity error */
 414 #define EVT_UNDERRUN            0x4     /* Underrun on corresponding FIFO, packet
 415                                            truncated */
 416 #define EVT_OVERRUN             0x5     /* A recv FIFO overflowed on reception of ISO
 417                                            packet */
 418 #define EVT_DESCRIPTOR_READ     0x6     /* An unrecoverable error occurred while host was
 419                                            reading a descriptor block */
 420 #define EVT_DATA_READ           0x7     /* An error occurred while host controller was
 421                                            attempting to read from host memory in the data
 422                                            stage of descriptor processing */
 423 #define EVT_DATA_WRITE          0x8     /* An error occurred while host controller was
 424                                            attempting to write either during the data stage
 425                                            of descriptor processing, or when processing a single
 426                                            16-bit host memory write */
 427 #define EVT_BUS_RESET           0x9     /* Identifies a PHY packet in the recv buffer as
 428                                            being a synthesized bus reset packet */
 429 #define EVT_TIMEOUT             0xa     /* Indicates that the asynchronous transmit response
 430                                            packet expired and was not transmitted, or that an
 431                                            IT DMA context experienced a skip processing overflow */
 432 #define EVT_TCODE_ERR           0xb     /* A bad tCode is associated with this packet.
 433                                            The packet was flushed */
 434 #define EVT_RESERVED_B          0xc     /* Reserved, not used !!! */
 435 #define EVT_RESERVED_C          0xd     /* Reserved, not used !!! */
 436 #define EVT_UNKNOWN             0xe     /* An error condition has occurred that cannot be
 437                                            represented by any other event codes defined herein. */
 438 #define EVT_FLUSHED             0xf     /* Send by the link side of output FIFO when asynchronous
 439                                            packets are being flushed due to a bus reset. */
 440
 441 #define OHCI1394_TCODE_PHY               0xE
 442
 443 void ohci1394_init_iso_tasklet(struct ohci1394_iso_tasklet *tasklet,
 444                                int type,
 445                                void (*func)(unsigned long),
 446                                unsigned long data);
 447 int ohci1394_register_iso_tasklet(struct ti_ohci *ohci,
 448                                   struct ohci1394_iso_tasklet *tasklet);
 449 void ohci1394_unregister_iso_tasklet(struct ti_ohci *ohci,
 450                                      struct ohci1394_iso_tasklet *tasklet);
 451
 452 /* returns zero if successful, one if DMA context is locked up */
 453 int ohci1394_stop_context      (struct ti_ohci *ohci, int reg, char *msg);
 454 struct ti_ohci *ohci1394_get_struct(int card_num);
 455
 456 #endif