Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Driver for ST5481 USB ISDN modem |
| 3 | * |
| 4 | * Author Frode Isaksen |
| 5 | * Copyright 2001 by Frode Isaksen <fisaksen@bewan.com> |
| 6 | * 2001 by Kai Germaschewski <kai.germaschewski@gmx.de> |
| 7 | * |
| 8 | * This software may be used and distributed according to the terms |
| 9 | * of the GNU General Public License, incorporated herein by reference. |
| 10 | * |
| 11 | */ |
| 12 | |
| 13 | #include <linux/init.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 14 | #include <linux/gfp.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 15 | #include <linux/usb.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 16 | #include <linux/netdevice.h> |
| 17 | #include "st5481.h" |
| 18 | |
| 19 | static void ph_connect(struct st5481_adapter *adapter); |
| 20 | static void ph_disconnect(struct st5481_adapter *adapter); |
| 21 | |
| 22 | static struct Fsm l1fsm; |
| 23 | |
| 24 | static char *strL1State[] = |
| 25 | { |
| 26 | "ST_L1_F3", |
| 27 | "ST_L1_F4", |
| 28 | "ST_L1_F6", |
| 29 | "ST_L1_F7", |
| 30 | "ST_L1_F8", |
| 31 | }; |
| 32 | |
| 33 | static char *strL1Event[] = |
| 34 | { |
| 35 | "EV_IND_DP", |
| 36 | "EV_IND_1", |
| 37 | "EV_IND_2", |
| 38 | "EV_IND_3", |
| 39 | "EV_IND_RSY", |
| 40 | "EV_IND_5", |
| 41 | "EV_IND_6", |
| 42 | "EV_IND_7", |
| 43 | "EV_IND_AP", |
| 44 | "EV_IND_9", |
| 45 | "EV_IND_10", |
| 46 | "EV_IND_11", |
| 47 | "EV_IND_AI8", |
| 48 | "EV_IND_AI10", |
| 49 | "EV_IND_AIL", |
| 50 | "EV_IND_DI", |
| 51 | "EV_PH_ACTIVATE_REQ", |
| 52 | "EV_PH_DEACTIVATE_REQ", |
| 53 | "EV_TIMER3", |
| 54 | }; |
| 55 | |
| 56 | static inline void D_L1L2(struct st5481_adapter *adapter, int pr, void *arg) |
| 57 | { |
| 58 | struct hisax_if *ifc = (struct hisax_if *) &adapter->hisax_d_if; |
| 59 | |
| 60 | ifc->l1l2(ifc, pr, arg); |
| 61 | } |
| 62 | |
| 63 | static void |
| 64 | l1_go_f3(struct FsmInst *fi, int event, void *arg) |
| 65 | { |
| 66 | struct st5481_adapter *adapter = fi->userdata; |
| 67 | |
| 68 | if (fi->state == ST_L1_F7) |
| 69 | ph_disconnect(adapter); |
| 70 | |
| 71 | FsmChangeState(fi, ST_L1_F3); |
| 72 | D_L1L2(adapter, PH_DEACTIVATE | INDICATION, NULL); |
| 73 | } |
| 74 | |
| 75 | static void |
| 76 | l1_go_f6(struct FsmInst *fi, int event, void *arg) |
| 77 | { |
| 78 | struct st5481_adapter *adapter = fi->userdata; |
| 79 | |
| 80 | if (fi->state == ST_L1_F7) |
| 81 | ph_disconnect(adapter); |
| 82 | |
| 83 | FsmChangeState(fi, ST_L1_F6); |
| 84 | } |
| 85 | |
| 86 | static void |
| 87 | l1_go_f7(struct FsmInst *fi, int event, void *arg) |
| 88 | { |
| 89 | struct st5481_adapter *adapter = fi->userdata; |
| 90 | |
| 91 | FsmDelTimer(&adapter->timer, 0); |
| 92 | ph_connect(adapter); |
| 93 | FsmChangeState(fi, ST_L1_F7); |
| 94 | D_L1L2(adapter, PH_ACTIVATE | INDICATION, NULL); |
| 95 | } |
| 96 | |
| 97 | static void |
| 98 | l1_go_f8(struct FsmInst *fi, int event, void *arg) |
| 99 | { |
| 100 | struct st5481_adapter *adapter = fi->userdata; |
| 101 | |
| 102 | if (fi->state == ST_L1_F7) |
| 103 | ph_disconnect(adapter); |
| 104 | |
| 105 | FsmChangeState(fi, ST_L1_F8); |
| 106 | } |
| 107 | |
| 108 | static void |
| 109 | l1_timer3(struct FsmInst *fi, int event, void *arg) |
| 110 | { |
| 111 | struct st5481_adapter *adapter = fi->userdata; |
| 112 | |
| 113 | st5481_ph_command(adapter, ST5481_CMD_DR); |
| 114 | FsmChangeState(fi, ST_L1_F3); |
| 115 | D_L1L2(adapter, PH_DEACTIVATE | INDICATION, NULL); |
| 116 | } |
| 117 | |
| 118 | static void |
| 119 | l1_ignore(struct FsmInst *fi, int event, void *arg) |
| 120 | { |
| 121 | } |
| 122 | |
| 123 | static void |
| 124 | l1_activate(struct FsmInst *fi, int event, void *arg) |
| 125 | { |
| 126 | struct st5481_adapter *adapter = fi->userdata; |
| 127 | |
| 128 | st5481_ph_command(adapter, ST5481_CMD_DR); |
| 129 | st5481_ph_command(adapter, ST5481_CMD_PUP); |
| 130 | FsmRestartTimer(&adapter->timer, TIMER3_VALUE, EV_TIMER3, NULL, 2); |
| 131 | st5481_ph_command(adapter, ST5481_CMD_AR8); |
| 132 | FsmChangeState(fi, ST_L1_F4); |
| 133 | } |
| 134 | |
| 135 | static struct FsmNode L1FnList[] __initdata = |
| 136 | { |
| 137 | {ST_L1_F3, EV_IND_DP, l1_ignore}, |
| 138 | {ST_L1_F3, EV_IND_AP, l1_go_f6}, |
| 139 | {ST_L1_F3, EV_IND_AI8, l1_go_f7}, |
| 140 | {ST_L1_F3, EV_IND_AI10, l1_go_f7}, |
| 141 | {ST_L1_F3, EV_PH_ACTIVATE_REQ, l1_activate}, |
| 142 | |
| 143 | {ST_L1_F4, EV_TIMER3, l1_timer3}, |
| 144 | {ST_L1_F4, EV_IND_DP, l1_go_f3}, |
| 145 | {ST_L1_F4, EV_IND_AP, l1_go_f6}, |
| 146 | {ST_L1_F4, EV_IND_AI8, l1_go_f7}, |
| 147 | {ST_L1_F4, EV_IND_AI10, l1_go_f7}, |
| 148 | |
| 149 | {ST_L1_F6, EV_TIMER3, l1_timer3}, |
| 150 | {ST_L1_F6, EV_IND_DP, l1_go_f3}, |
| 151 | {ST_L1_F6, EV_IND_AP, l1_ignore}, |
| 152 | {ST_L1_F6, EV_IND_AI8, l1_go_f7}, |
| 153 | {ST_L1_F6, EV_IND_AI10, l1_go_f7}, |
| 154 | {ST_L1_F7, EV_IND_RSY, l1_go_f8}, |
| 155 | |
| 156 | {ST_L1_F7, EV_IND_DP, l1_go_f3}, |
| 157 | {ST_L1_F7, EV_IND_AP, l1_go_f6}, |
| 158 | {ST_L1_F7, EV_IND_AI8, l1_ignore}, |
| 159 | {ST_L1_F7, EV_IND_AI10, l1_ignore}, |
| 160 | {ST_L1_F7, EV_IND_RSY, l1_go_f8}, |
| 161 | |
| 162 | {ST_L1_F8, EV_TIMER3, l1_timer3}, |
| 163 | {ST_L1_F8, EV_IND_DP, l1_go_f3}, |
| 164 | {ST_L1_F8, EV_IND_AP, l1_go_f6}, |
| 165 | {ST_L1_F8, EV_IND_AI8, l1_go_f8}, |
| 166 | {ST_L1_F8, EV_IND_AI10, l1_go_f8}, |
| 167 | {ST_L1_F8, EV_IND_RSY, l1_ignore}, |
| 168 | }; |
| 169 | |
Joe Perches | 9920239 | 2010-11-10 18:54:58 +0000 | [diff] [blame] | 170 | static __attribute__((format(printf, 2, 3))) |
| 171 | void l1m_debug(struct FsmInst *fi, char *fmt, ...) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 172 | { |
| 173 | va_list args; |
| 174 | char buf[256]; |
| 175 | |
| 176 | va_start(args, fmt); |
Alexey Dobriyan | 0b2dd13 | 2006-12-08 02:39:34 -0800 | [diff] [blame] | 177 | vsnprintf(buf, sizeof(buf), fmt, args); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 178 | DBG(8, "%s", buf); |
| 179 | va_end(args); |
| 180 | } |
| 181 | |
| 182 | /* ====================================================================== |
| 183 | * D-Channel out |
| 184 | */ |
| 185 | |
| 186 | /* |
| 187 | D OUT state machine: |
| 188 | ==================== |
| 189 | |
| 190 | Transmit short frame (< 16 bytes of encoded data): |
| 191 | |
| 192 | L1 FRAME D_OUT_STATE USB D CHANNEL |
| 193 | -------- ----------- --- --------- |
| 194 | |
| 195 | FIXME |
| 196 | |
| 197 | -> [xx..xx] SHORT_INIT -> [7Exx..xxC1C27EFF] |
| 198 | SHORT_WAIT_DEN <> OUT_D_COUNTER=16 |
| 199 | |
| 200 | END_OF_SHORT <- DEN_EVENT -> 7Exx |
| 201 | xxxx |
| 202 | xxxx |
| 203 | xxxx |
| 204 | xxxx |
| 205 | xxxx |
| 206 | C1C1 |
| 207 | 7EFF |
| 208 | WAIT_FOR_RESET_IDLE <- D_UNDERRUN <- (8ms) |
| 209 | IDLE <> Reset pipe |
| 210 | |
| 211 | |
| 212 | |
| 213 | Transmit long frame (>= 16 bytes of encoded data): |
| 214 | |
| 215 | L1 FRAME D_OUT_STATE USB D CHANNEL |
| 216 | -------- ----------- --- --------- |
| 217 | |
| 218 | -> [xx...xx] IDLE |
| 219 | WAIT_FOR_STOP <> OUT_D_COUNTER=0 |
| 220 | WAIT_FOR_RESET <> Reset pipe |
| 221 | STOP |
| 222 | INIT_LONG_FRAME -> [7Exx..xx] |
| 223 | WAIT_DEN <> OUT_D_COUNTER=16 |
| 224 | OUT_NORMAL <- DEN_EVENT -> 7Exx |
| 225 | END_OF_FRAME_BUSY -> [xxxx] xxxx |
| 226 | END_OF_FRAME_NOT_BUSY -> [xxxx] xxxx |
| 227 | -> [xxxx] xxxx |
| 228 | -> [C1C2] xxxx |
| 229 | -> [7EFF] xxxx |
| 230 | xxxx |
| 231 | xxxx |
| 232 | .... |
| 233 | xxxx |
| 234 | C1C2 |
| 235 | 7EFF |
| 236 | <- D_UNDERRUN <- (> 8ms) |
| 237 | WAIT_FOR_STOP <> OUT_D_COUNTER=0 |
| 238 | WAIT_FOR_RESET <> Reset pipe |
| 239 | STOP |
| 240 | |
| 241 | */ |
| 242 | |
| 243 | static struct Fsm dout_fsm; |
| 244 | |
| 245 | static char *strDoutState[] = |
| 246 | { |
| 247 | "ST_DOUT_NONE", |
| 248 | |
| 249 | "ST_DOUT_SHORT_INIT", |
| 250 | "ST_DOUT_SHORT_WAIT_DEN", |
| 251 | |
| 252 | "ST_DOUT_LONG_INIT", |
| 253 | "ST_DOUT_LONG_WAIT_DEN", |
| 254 | "ST_DOUT_NORMAL", |
| 255 | |
| 256 | "ST_DOUT_WAIT_FOR_UNDERRUN", |
| 257 | "ST_DOUT_WAIT_FOR_NOT_BUSY", |
| 258 | "ST_DOUT_WAIT_FOR_STOP", |
| 259 | "ST_DOUT_WAIT_FOR_RESET", |
| 260 | }; |
| 261 | |
| 262 | static char *strDoutEvent[] = |
| 263 | { |
| 264 | "EV_DOUT_START_XMIT", |
| 265 | "EV_DOUT_COMPLETE", |
| 266 | "EV_DOUT_DEN", |
| 267 | "EV_DOUT_RESETED", |
| 268 | "EV_DOUT_STOPPED", |
| 269 | "EV_DOUT_COLL", |
| 270 | "EV_DOUT_UNDERRUN", |
| 271 | }; |
| 272 | |
Joe Perches | 9920239 | 2010-11-10 18:54:58 +0000 | [diff] [blame] | 273 | static __attribute__((format(printf, 2, 3))) |
| 274 | void dout_debug(struct FsmInst *fi, char *fmt, ...) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 275 | { |
| 276 | va_list args; |
| 277 | char buf[256]; |
| 278 | |
| 279 | va_start(args, fmt); |
Alexey Dobriyan | 0b2dd13 | 2006-12-08 02:39:34 -0800 | [diff] [blame] | 280 | vsnprintf(buf, sizeof(buf), fmt, args); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 281 | DBG(0x2, "%s", buf); |
| 282 | va_end(args); |
| 283 | } |
| 284 | |
| 285 | static void dout_stop_event(void *context) |
| 286 | { |
| 287 | struct st5481_adapter *adapter = context; |
| 288 | |
| 289 | FsmEvent(&adapter->d_out.fsm, EV_DOUT_STOPPED, NULL); |
| 290 | } |
| 291 | |
| 292 | /* |
| 293 | * Start the transfer of a D channel frame. |
| 294 | */ |
| 295 | static void usb_d_out(struct st5481_adapter *adapter, int buf_nr) |
| 296 | { |
| 297 | struct st5481_d_out *d_out = &adapter->d_out; |
| 298 | struct urb *urb; |
| 299 | unsigned int num_packets, packet_offset; |
| 300 | int len, buf_size, bytes_sent; |
| 301 | struct sk_buff *skb; |
| 302 | struct usb_iso_packet_descriptor *desc; |
| 303 | |
| 304 | if (d_out->fsm.state != ST_DOUT_NORMAL) |
| 305 | return; |
| 306 | |
| 307 | if (test_and_set_bit(buf_nr, &d_out->busy)) { |
| 308 | DBG(2, "ep %d urb %d busy %#lx", EP_D_OUT, buf_nr, d_out->busy); |
| 309 | return; |
| 310 | } |
| 311 | urb = d_out->urb[buf_nr]; |
| 312 | |
| 313 | skb = d_out->tx_skb; |
| 314 | |
| 315 | buf_size = NUM_ISO_PACKETS_D * SIZE_ISO_PACKETS_D_OUT; |
| 316 | |
| 317 | if (skb) { |
| 318 | len = isdnhdlc_encode(&d_out->hdlc_state, |
| 319 | skb->data, skb->len, &bytes_sent, |
| 320 | urb->transfer_buffer, buf_size); |
| 321 | skb_pull(skb,bytes_sent); |
| 322 | } else { |
| 323 | // Send flags or idle |
| 324 | len = isdnhdlc_encode(&d_out->hdlc_state, |
| 325 | NULL, 0, &bytes_sent, |
| 326 | urb->transfer_buffer, buf_size); |
| 327 | } |
| 328 | |
| 329 | if (len < buf_size) { |
| 330 | FsmChangeState(&d_out->fsm, ST_DOUT_WAIT_FOR_UNDERRUN); |
| 331 | } |
| 332 | if (skb && !skb->len) { |
| 333 | d_out->tx_skb = NULL; |
| 334 | D_L1L2(adapter, PH_DATA | CONFIRM, NULL); |
| 335 | dev_kfree_skb_any(skb); |
| 336 | } |
| 337 | |
| 338 | // Prepare the URB |
| 339 | urb->transfer_buffer_length = len; |
| 340 | num_packets = 0; |
| 341 | packet_offset = 0; |
| 342 | while (packet_offset < len) { |
| 343 | desc = &urb->iso_frame_desc[num_packets]; |
| 344 | desc->offset = packet_offset; |
| 345 | desc->length = SIZE_ISO_PACKETS_D_OUT; |
| 346 | if (len - packet_offset < desc->length) |
| 347 | desc->length = len - packet_offset; |
| 348 | num_packets++; |
| 349 | packet_offset += desc->length; |
| 350 | } |
| 351 | urb->number_of_packets = num_packets; |
| 352 | |
| 353 | // Prepare the URB |
| 354 | urb->dev = adapter->usb_dev; |
| 355 | // Need to transmit the next buffer 2ms after the DEN_EVENT |
| 356 | urb->transfer_flags = 0; |
| 357 | urb->start_frame = usb_get_current_frame_number(adapter->usb_dev)+2; |
| 358 | |
| 359 | DBG_ISO_PACKET(0x20,urb); |
| 360 | |
| 361 | if (usb_submit_urb(urb, GFP_KERNEL) < 0) { |
| 362 | // There is another URB queued up |
| 363 | urb->transfer_flags = URB_ISO_ASAP; |
| 364 | SUBMIT_URB(urb, GFP_KERNEL); |
| 365 | } |
| 366 | } |
| 367 | |
| 368 | static void fifo_reseted(void *context) |
| 369 | { |
| 370 | struct st5481_adapter *adapter = context; |
| 371 | |
| 372 | FsmEvent(&adapter->d_out.fsm, EV_DOUT_RESETED, NULL); |
| 373 | } |
| 374 | |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 375 | static void usb_d_out_complete(struct urb *urb) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 376 | { |
| 377 | struct st5481_adapter *adapter = urb->context; |
| 378 | struct st5481_d_out *d_out = &adapter->d_out; |
Alan Cox | 17a4506 | 2006-10-03 01:13:55 -0700 | [diff] [blame] | 379 | long buf_nr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 380 | |
| 381 | DBG(2, ""); |
| 382 | |
| 383 | buf_nr = get_buf_nr(d_out->urb, urb); |
| 384 | test_and_clear_bit(buf_nr, &d_out->busy); |
| 385 | |
| 386 | if (unlikely(urb->status < 0)) { |
Karsten Keil | 61ffcaf | 2005-09-17 23:52:42 +0200 | [diff] [blame] | 387 | switch (urb->status) { |
| 388 | case -ENOENT: |
| 389 | case -ESHUTDOWN: |
| 390 | case -ECONNRESET: |
| 391 | DBG(1,"urb killed status %d", urb->status); |
| 392 | break; |
| 393 | default: |
Arjan van de Ven | b6c6393 | 2008-07-25 01:45:52 -0700 | [diff] [blame] | 394 | WARNING("urb status %d",urb->status); |
Karsten Keil | 61ffcaf | 2005-09-17 23:52:42 +0200 | [diff] [blame] | 395 | if (d_out->busy == 0) { |
| 396 | st5481_usb_pipe_reset(adapter, EP_D_OUT | USB_DIR_OUT, fifo_reseted, adapter); |
| 397 | } |
| 398 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 399 | } |
Karsten Keil | 61ffcaf | 2005-09-17 23:52:42 +0200 | [diff] [blame] | 400 | return; // Give up |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 401 | } |
| 402 | |
| 403 | FsmEvent(&adapter->d_out.fsm, EV_DOUT_COMPLETE, (void *) buf_nr); |
| 404 | } |
| 405 | |
| 406 | /* ====================================================================== */ |
| 407 | |
| 408 | static void dout_start_xmit(struct FsmInst *fsm, int event, void *arg) |
| 409 | { |
| 410 | // FIXME unify? |
| 411 | struct st5481_adapter *adapter = fsm->userdata; |
| 412 | struct st5481_d_out *d_out = &adapter->d_out; |
| 413 | struct urb *urb; |
| 414 | int len, bytes_sent; |
| 415 | struct sk_buff *skb; |
| 416 | int buf_nr = 0; |
| 417 | |
| 418 | skb = d_out->tx_skb; |
| 419 | |
| 420 | DBG(2,"len=%d",skb->len); |
| 421 | |
Karsten Keil | c38fc3b | 2009-07-08 20:31:42 +0200 | [diff] [blame] | 422 | isdnhdlc_out_init(&d_out->hdlc_state, HDLC_DCHANNEL | HDLC_BITREVERSE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 423 | |
| 424 | if (test_and_set_bit(buf_nr, &d_out->busy)) { |
Arjan van de Ven | b6c6393 | 2008-07-25 01:45:52 -0700 | [diff] [blame] | 425 | WARNING("ep %d urb %d busy %#lx", EP_D_OUT, buf_nr, d_out->busy); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 426 | return; |
| 427 | } |
| 428 | urb = d_out->urb[buf_nr]; |
| 429 | |
| 430 | DBG_SKB(0x10, skb); |
| 431 | len = isdnhdlc_encode(&d_out->hdlc_state, |
| 432 | skb->data, skb->len, &bytes_sent, |
| 433 | urb->transfer_buffer, 16); |
| 434 | skb_pull(skb, bytes_sent); |
| 435 | |
| 436 | if(len < 16) |
| 437 | FsmChangeState(&d_out->fsm, ST_DOUT_SHORT_INIT); |
| 438 | else |
| 439 | FsmChangeState(&d_out->fsm, ST_DOUT_LONG_INIT); |
| 440 | |
| 441 | if (skb->len == 0) { |
| 442 | d_out->tx_skb = NULL; |
| 443 | D_L1L2(adapter, PH_DATA | CONFIRM, NULL); |
| 444 | dev_kfree_skb_any(skb); |
| 445 | } |
| 446 | |
| 447 | // Prepare the URB |
| 448 | urb->transfer_buffer_length = len; |
| 449 | |
| 450 | urb->iso_frame_desc[0].offset = 0; |
| 451 | urb->iso_frame_desc[0].length = len; |
| 452 | urb->number_of_packets = 1; |
| 453 | |
| 454 | // Prepare the URB |
| 455 | urb->dev = adapter->usb_dev; |
| 456 | urb->transfer_flags = URB_ISO_ASAP; |
| 457 | |
| 458 | DBG_ISO_PACKET(0x20,urb); |
| 459 | SUBMIT_URB(urb, GFP_KERNEL); |
| 460 | } |
| 461 | |
| 462 | static void dout_short_fifo(struct FsmInst *fsm, int event, void *arg) |
| 463 | { |
| 464 | struct st5481_adapter *adapter = fsm->userdata; |
| 465 | struct st5481_d_out *d_out = &adapter->d_out; |
| 466 | |
| 467 | FsmChangeState(&d_out->fsm, ST_DOUT_SHORT_WAIT_DEN); |
| 468 | st5481_usb_device_ctrl_msg(adapter, OUT_D_COUNTER, 16, NULL, NULL); |
| 469 | } |
| 470 | |
| 471 | static void dout_end_short_frame(struct FsmInst *fsm, int event, void *arg) |
| 472 | { |
| 473 | struct st5481_adapter *adapter = fsm->userdata; |
| 474 | struct st5481_d_out *d_out = &adapter->d_out; |
| 475 | |
| 476 | FsmChangeState(&d_out->fsm, ST_DOUT_WAIT_FOR_UNDERRUN); |
| 477 | } |
| 478 | |
| 479 | static void dout_long_enable_fifo(struct FsmInst *fsm, int event, void *arg) |
| 480 | { |
| 481 | struct st5481_adapter *adapter = fsm->userdata; |
| 482 | struct st5481_d_out *d_out = &adapter->d_out; |
| 483 | |
| 484 | st5481_usb_device_ctrl_msg(adapter, OUT_D_COUNTER, 16, NULL, NULL); |
| 485 | FsmChangeState(&d_out->fsm, ST_DOUT_LONG_WAIT_DEN); |
| 486 | } |
| 487 | |
| 488 | static void dout_long_den(struct FsmInst *fsm, int event, void *arg) |
| 489 | { |
| 490 | struct st5481_adapter *adapter = fsm->userdata; |
| 491 | struct st5481_d_out *d_out = &adapter->d_out; |
| 492 | |
| 493 | FsmChangeState(&d_out->fsm, ST_DOUT_NORMAL); |
| 494 | usb_d_out(adapter, 0); |
| 495 | usb_d_out(adapter, 1); |
| 496 | } |
| 497 | |
| 498 | static void dout_reset(struct FsmInst *fsm, int event, void *arg) |
| 499 | { |
| 500 | struct st5481_adapter *adapter = fsm->userdata; |
| 501 | struct st5481_d_out *d_out = &adapter->d_out; |
| 502 | |
| 503 | FsmChangeState(&d_out->fsm, ST_DOUT_WAIT_FOR_RESET); |
| 504 | st5481_usb_pipe_reset(adapter, EP_D_OUT | USB_DIR_OUT, fifo_reseted, adapter); |
| 505 | } |
| 506 | |
| 507 | static void dout_stop(struct FsmInst *fsm, int event, void *arg) |
| 508 | { |
| 509 | struct st5481_adapter *adapter = fsm->userdata; |
| 510 | struct st5481_d_out *d_out = &adapter->d_out; |
| 511 | |
| 512 | FsmChangeState(&d_out->fsm, ST_DOUT_WAIT_FOR_STOP); |
| 513 | st5481_usb_device_ctrl_msg(adapter, OUT_D_COUNTER, 0, dout_stop_event, adapter); |
| 514 | } |
| 515 | |
| 516 | static void dout_underrun(struct FsmInst *fsm, int event, void *arg) |
| 517 | { |
| 518 | struct st5481_adapter *adapter = fsm->userdata; |
| 519 | struct st5481_d_out *d_out = &adapter->d_out; |
| 520 | |
| 521 | if (test_bit(0, &d_out->busy) || test_bit(1, &d_out->busy)) { |
| 522 | FsmChangeState(&d_out->fsm, ST_DOUT_WAIT_FOR_NOT_BUSY); |
| 523 | } else { |
| 524 | dout_stop(fsm, event, arg); |
| 525 | } |
| 526 | } |
| 527 | |
| 528 | static void dout_check_busy(struct FsmInst *fsm, int event, void *arg) |
| 529 | { |
| 530 | struct st5481_adapter *adapter = fsm->userdata; |
| 531 | struct st5481_d_out *d_out = &adapter->d_out; |
| 532 | |
| 533 | if (!test_bit(0, &d_out->busy) && !test_bit(1, &d_out->busy)) |
| 534 | dout_stop(fsm, event, arg); |
| 535 | } |
| 536 | |
| 537 | static void dout_reseted(struct FsmInst *fsm, int event, void *arg) |
| 538 | { |
| 539 | struct st5481_adapter *adapter = fsm->userdata; |
| 540 | struct st5481_d_out *d_out = &adapter->d_out; |
| 541 | |
| 542 | FsmChangeState(&d_out->fsm, ST_DOUT_NONE); |
| 543 | // FIXME locking |
| 544 | if (d_out->tx_skb) |
| 545 | FsmEvent(&d_out->fsm, EV_DOUT_START_XMIT, NULL); |
| 546 | } |
| 547 | |
| 548 | static void dout_complete(struct FsmInst *fsm, int event, void *arg) |
| 549 | { |
| 550 | struct st5481_adapter *adapter = fsm->userdata; |
Alan Cox | 17a4506 | 2006-10-03 01:13:55 -0700 | [diff] [blame] | 551 | long buf_nr = (long) arg; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 552 | |
| 553 | usb_d_out(adapter, buf_nr); |
| 554 | } |
| 555 | |
| 556 | static void dout_ignore(struct FsmInst *fsm, int event, void *arg) |
| 557 | { |
| 558 | } |
| 559 | |
| 560 | static struct FsmNode DoutFnList[] __initdata = |
| 561 | { |
| 562 | {ST_DOUT_NONE, EV_DOUT_START_XMIT, dout_start_xmit}, |
| 563 | |
| 564 | {ST_DOUT_SHORT_INIT, EV_DOUT_COMPLETE, dout_short_fifo}, |
| 565 | |
| 566 | {ST_DOUT_SHORT_WAIT_DEN, EV_DOUT_DEN, dout_end_short_frame}, |
| 567 | {ST_DOUT_SHORT_WAIT_DEN, EV_DOUT_UNDERRUN, dout_underrun}, |
| 568 | |
| 569 | {ST_DOUT_LONG_INIT, EV_DOUT_COMPLETE, dout_long_enable_fifo}, |
| 570 | |
| 571 | {ST_DOUT_LONG_WAIT_DEN, EV_DOUT_DEN, dout_long_den}, |
| 572 | {ST_DOUT_LONG_WAIT_DEN, EV_DOUT_UNDERRUN, dout_underrun}, |
| 573 | |
| 574 | {ST_DOUT_NORMAL, EV_DOUT_UNDERRUN, dout_underrun}, |
| 575 | {ST_DOUT_NORMAL, EV_DOUT_COMPLETE, dout_complete}, |
| 576 | |
| 577 | {ST_DOUT_WAIT_FOR_UNDERRUN, EV_DOUT_UNDERRUN, dout_underrun}, |
| 578 | {ST_DOUT_WAIT_FOR_UNDERRUN, EV_DOUT_COMPLETE, dout_ignore}, |
| 579 | |
| 580 | {ST_DOUT_WAIT_FOR_NOT_BUSY, EV_DOUT_COMPLETE, dout_check_busy}, |
| 581 | |
| 582 | {ST_DOUT_WAIT_FOR_STOP, EV_DOUT_STOPPED, dout_reset}, |
| 583 | |
| 584 | {ST_DOUT_WAIT_FOR_RESET, EV_DOUT_RESETED, dout_reseted}, |
| 585 | }; |
| 586 | |
| 587 | void st5481_d_l2l1(struct hisax_if *hisax_d_if, int pr, void *arg) |
| 588 | { |
| 589 | struct st5481_adapter *adapter = hisax_d_if->priv; |
| 590 | struct sk_buff *skb = arg; |
| 591 | |
| 592 | switch (pr) { |
| 593 | case PH_ACTIVATE | REQUEST: |
| 594 | FsmEvent(&adapter->l1m, EV_PH_ACTIVATE_REQ, NULL); |
| 595 | break; |
| 596 | case PH_DEACTIVATE | REQUEST: |
| 597 | FsmEvent(&adapter->l1m, EV_PH_DEACTIVATE_REQ, NULL); |
| 598 | break; |
| 599 | case PH_DATA | REQUEST: |
| 600 | DBG(2, "PH_DATA REQUEST len %d", skb->len); |
Eric Sesterhenn | 6dd44a7 | 2006-03-26 18:19:26 +0200 | [diff] [blame] | 601 | BUG_ON(adapter->d_out.tx_skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 602 | adapter->d_out.tx_skb = skb; |
| 603 | FsmEvent(&adapter->d_out.fsm, EV_DOUT_START_XMIT, NULL); |
| 604 | break; |
| 605 | default: |
Arjan van de Ven | b6c6393 | 2008-07-25 01:45:52 -0700 | [diff] [blame] | 606 | WARNING("pr %#x\n", pr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 607 | break; |
| 608 | } |
| 609 | } |
| 610 | |
| 611 | /* ====================================================================== |
| 612 | */ |
| 613 | |
| 614 | /* |
| 615 | * Start receiving on the D channel since entered state F7. |
| 616 | */ |
| 617 | static void ph_connect(struct st5481_adapter *adapter) |
| 618 | { |
| 619 | struct st5481_d_out *d_out = &adapter->d_out; |
| 620 | struct st5481_in *d_in = &adapter->d_in; |
| 621 | |
| 622 | DBG(8,""); |
| 623 | |
| 624 | FsmChangeState(&d_out->fsm, ST_DOUT_NONE); |
| 625 | |
| 626 | // st5481_usb_device_ctrl_msg(adapter, FFMSK_D, OUT_UNDERRUN, NULL, NULL); |
| 627 | st5481_usb_device_ctrl_msg(adapter, FFMSK_D, 0xfc, NULL, NULL); |
| 628 | st5481_in_mode(d_in, L1_MODE_HDLC); |
| 629 | |
| 630 | #ifdef LOOPBACK |
| 631 | // Turn loopback on (data sent on B and D looped back) |
| 632 | st5481_usb_device_ctrl_msg(cs, LBB, 0x04, NULL, NULL); |
| 633 | #endif |
| 634 | |
| 635 | st5481_usb_pipe_reset(adapter, EP_D_OUT | USB_DIR_OUT, NULL, NULL); |
| 636 | |
| 637 | // Turn on the green LED to tell that we are in state F7 |
| 638 | adapter->leds |= GREEN_LED; |
| 639 | st5481_usb_device_ctrl_msg(adapter, GPIO_OUT, adapter->leds, NULL, NULL); |
| 640 | } |
| 641 | |
| 642 | /* |
| 643 | * Stop receiving on the D channel since not in state F7. |
| 644 | */ |
| 645 | static void ph_disconnect(struct st5481_adapter *adapter) |
| 646 | { |
| 647 | DBG(8,""); |
| 648 | |
| 649 | st5481_in_mode(&adapter->d_in, L1_MODE_NULL); |
| 650 | |
| 651 | // Turn off the green LED to tell that we left state F7 |
| 652 | adapter->leds &= ~GREEN_LED; |
| 653 | st5481_usb_device_ctrl_msg(adapter, GPIO_OUT, adapter->leds, NULL, NULL); |
| 654 | } |
| 655 | |
| 656 | static int st5481_setup_d_out(struct st5481_adapter *adapter) |
| 657 | { |
| 658 | struct usb_device *dev = adapter->usb_dev; |
| 659 | struct usb_interface *intf; |
| 660 | struct usb_host_interface *altsetting = NULL; |
| 661 | struct usb_host_endpoint *endpoint; |
| 662 | struct st5481_d_out *d_out = &adapter->d_out; |
| 663 | |
| 664 | DBG(2,""); |
| 665 | |
| 666 | intf = usb_ifnum_to_if(dev, 0); |
| 667 | if (intf) |
| 668 | altsetting = usb_altnum_to_altsetting(intf, 3); |
| 669 | if (!altsetting) |
| 670 | return -ENXIO; |
| 671 | |
| 672 | // Allocate URBs and buffers for the D channel out |
| 673 | endpoint = &altsetting->endpoint[EP_D_OUT-1]; |
| 674 | |
| 675 | DBG(2,"endpoint address=%02x,packet size=%d", |
| 676 | endpoint->desc.bEndpointAddress, le16_to_cpu(endpoint->desc.wMaxPacketSize)); |
| 677 | |
| 678 | return st5481_setup_isocpipes(d_out->urb, dev, |
| 679 | usb_sndisocpipe(dev, endpoint->desc.bEndpointAddress), |
| 680 | NUM_ISO_PACKETS_D, SIZE_ISO_PACKETS_D_OUT, |
| 681 | NUM_ISO_PACKETS_D * SIZE_ISO_PACKETS_D_OUT, |
| 682 | usb_d_out_complete, adapter); |
| 683 | } |
| 684 | |
| 685 | static void st5481_release_d_out(struct st5481_adapter *adapter) |
| 686 | { |
| 687 | struct st5481_d_out *d_out = &adapter->d_out; |
| 688 | |
| 689 | DBG(2,""); |
| 690 | |
| 691 | st5481_release_isocpipes(d_out->urb); |
| 692 | } |
| 693 | |
| 694 | int st5481_setup_d(struct st5481_adapter *adapter) |
| 695 | { |
| 696 | int retval; |
| 697 | |
| 698 | DBG(2,""); |
| 699 | |
| 700 | retval = st5481_setup_d_out(adapter); |
| 701 | if (retval) |
| 702 | goto err; |
| 703 | adapter->d_in.bufsize = MAX_DFRAME_LEN_L1; |
| 704 | adapter->d_in.num_packets = NUM_ISO_PACKETS_D; |
| 705 | adapter->d_in.packet_size = SIZE_ISO_PACKETS_D_IN; |
| 706 | adapter->d_in.ep = EP_D_IN | USB_DIR_IN; |
| 707 | adapter->d_in.counter = IN_D_COUNTER; |
| 708 | adapter->d_in.adapter = adapter; |
| 709 | adapter->d_in.hisax_if = &adapter->hisax_d_if.ifc; |
| 710 | retval = st5481_setup_in(&adapter->d_in); |
| 711 | if (retval) |
| 712 | goto err_d_out; |
| 713 | |
| 714 | adapter->l1m.fsm = &l1fsm; |
| 715 | adapter->l1m.state = ST_L1_F3; |
Karsten Keil | 61ffcaf | 2005-09-17 23:52:42 +0200 | [diff] [blame] | 716 | adapter->l1m.debug = st5481_debug & 0x100; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 717 | adapter->l1m.userdata = adapter; |
| 718 | adapter->l1m.printdebug = l1m_debug; |
| 719 | FsmInitTimer(&adapter->l1m, &adapter->timer); |
| 720 | |
| 721 | adapter->d_out.fsm.fsm = &dout_fsm; |
| 722 | adapter->d_out.fsm.state = ST_DOUT_NONE; |
Karsten Keil | 61ffcaf | 2005-09-17 23:52:42 +0200 | [diff] [blame] | 723 | adapter->d_out.fsm.debug = st5481_debug & 0x100; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 724 | adapter->d_out.fsm.userdata = adapter; |
| 725 | adapter->d_out.fsm.printdebug = dout_debug; |
| 726 | |
| 727 | return 0; |
| 728 | |
| 729 | err_d_out: |
| 730 | st5481_release_d_out(adapter); |
| 731 | err: |
| 732 | return retval; |
| 733 | } |
| 734 | |
| 735 | void st5481_release_d(struct st5481_adapter *adapter) |
| 736 | { |
| 737 | DBG(2,""); |
| 738 | |
| 739 | st5481_release_in(&adapter->d_in); |
| 740 | st5481_release_d_out(adapter); |
| 741 | } |
| 742 | |
| 743 | /* ====================================================================== |
| 744 | * init / exit |
| 745 | */ |
| 746 | |
| 747 | int __init st5481_d_init(void) |
| 748 | { |
| 749 | int retval; |
| 750 | |
| 751 | l1fsm.state_count = L1_STATE_COUNT; |
| 752 | l1fsm.event_count = L1_EVENT_COUNT; |
| 753 | l1fsm.strEvent = strL1Event; |
| 754 | l1fsm.strState = strL1State; |
| 755 | retval = FsmNew(&l1fsm, L1FnList, ARRAY_SIZE(L1FnList)); |
| 756 | if (retval) |
| 757 | goto err; |
| 758 | |
| 759 | dout_fsm.state_count = DOUT_STATE_COUNT; |
| 760 | dout_fsm.event_count = DOUT_EVENT_COUNT; |
| 761 | dout_fsm.strEvent = strDoutEvent; |
| 762 | dout_fsm.strState = strDoutState; |
| 763 | retval = FsmNew(&dout_fsm, DoutFnList, ARRAY_SIZE(DoutFnList)); |
| 764 | if (retval) |
| 765 | goto err_l1; |
| 766 | |
| 767 | return 0; |
| 768 | |
| 769 | err_l1: |
| 770 | FsmFree(&l1fsm); |
| 771 | err: |
| 772 | return retval; |
| 773 | } |
| 774 | |
| 775 | // can't be __exit |
| 776 | void st5481_d_exit(void) |
| 777 | { |
| 778 | FsmFree(&l1fsm); |
| 779 | FsmFree(&dout_fsm); |
| 780 | } |